/* roulang page: index */
:root {
            --primary: #2563EB;
            --primary-hover: #1D4ED8;
            --primary-soft: rgba(37, 99, 235, 0.08);
            --secondary: #16A34A;
            --secondary-hover: #15803D;
            --bg: #F8FAFC;
            --bg-alt: #F1F5F9;
            --card: #FFFFFF;
            --text: #0F172A;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --accent: #F59E0B;
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-pill: 999px;
            --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 8px 32px rgba(37, 99, 235, 0.18);
            --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --transition: 0.2s ease;
            --section-padding: 80px;
            --section-padding-mobile: 48px;
            --container-max: 1200px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-secondary);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(37, 99, 235, 0.3);
            outline-offset: 2px;
        }

        ul,
        ol {
            list-style: none;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

        /* 导航 */
        .header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--card);
            border-bottom: 1px solid var(--border);
            transition: box-shadow var(--transition);
        }

        .header.scrolled {
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.08);
        }

        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
        }

        .header-search {
            flex: 1;
            max-width: 360px;
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-alt);
            border-radius: var(--radius-pill);
            padding: 8px 16px;
            border: 1px solid var(--border);
            transition: border-color var(--transition);
        }

        .header-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }

        .header-search svg {
            flex-shrink: 0;
            width: 18px;
            height: 18px;
            color: var(--text-muted);
        }

        .header-search input {
            flex: 1;
            font-size: 14px;
            color: var(--text);
            background: transparent;
            border: none;
            outline: none;
        }

        .header-search input::placeholder {
            color: var(--text-muted);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            transition: all var(--transition);
            white-space: nowrap;
            border: 1px solid transparent;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            border-color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn-secondary:hover {
            background: rgba(37, 99, 235, 0.05);
            transform: translateY(-2px);
        }

        .btn-success {
            background: var(--secondary);
            color: #fff;
            border-color: var(--secondary);
        }

        .btn-success:hover {
            background: var(--secondary-hover);
            border-color: var(--secondary-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(22, 163, 74, 0.3);
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 14px;
        }

        .btn-lg {
            padding: 14px 28px;
            font-size: 16px;
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 0 12px;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            border-top: 1px solid var(--border);
            padding-top: 10px;
        }

        .header-nav::-webkit-scrollbar {
            display: none;
        }

        .nav-pill {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 7px 18px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--card);
            border: 1px solid var(--border);
            transition: all var(--transition);
            white-space: nowrap;
            cursor: pointer;
        }

        .nav-pill:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-soft);
        }

        .nav-pill.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            font-weight: 600;
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--text);
            padding: 4px;
        }

        /* Hero */
        .hero {
            position: relative;
            padding: 72px 0 80px;
            background: var(--card);
            overflow: hidden;
            border-bottom: 1px solid var(--border);
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/cae04734b41a0eb9.webp') center / cover no-repeat;
            opacity: 0.07;
            pointer-events: none;
        }

        .hero .container {
            position: relative;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .hero-content {
            padding-right: 16px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-soft);
            color: var(--primary);
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 20px;
            border: 1px solid rgba(37, 99, 235, 0.2);
        }

        .hero-badge-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--secondary);
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(1.5);
            }
        }

        .hero h1 {
            font-size: clamp(32px, 4.5vw, 46px);
            font-weight: 800;
            line-height: 1.25;
            color: var(--text);
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }

        .hero p {
            font-size: 17px;
            line-height: 1.8;
            color: var(--text-secondary);
            margin-bottom: 28px;
            max-width: 520px;
        }

        .hero-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .hero-stats {
            display: flex;
            gap: 32px;
            margin-top: 36px;
            flex-wrap: wrap;
        }

        .hero-stat {
            text-align: left;
        }

        .hero-stat-number {
            font-size: 28px;
            font-weight: 800;
            color: var(--primary);
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
        }

        .hero-stat-label {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        .hero-image {
            position: relative;
            border-radius: 24px;
            overflow: hidden;
            box-shadow: var(--shadow-hover);
        }

        .hero-image img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            border-radius: 24px;
        }

        .hero-image-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 23, 42, 0.6), transparent 50%);
            border-radius: 24px;
            display: flex;
            align-items: flex-end;
            padding: 24px;
        }

        .hero-image-info {
            color: #fff;
        }

        .hero-image-info .match-tag {
            display: inline-block;
            background: var(--accent);
            color: var(--text);
            font-weight: 700;
            font-size: 12px;
            padding: 4px 10px;
            border-radius: 4px;
            margin-bottom: 8px;
        }

        .hero-image-info .match-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .hero-image-info .match-time {
            font-size: 13px;
            opacity: 0.85;
        }

        /* 数据看板条 */
        .data-strip {
            background: var(--card);
            border-bottom: 1px solid var(--border);
        }

        .data-strip .container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
        }

        .data-strip-item {
            padding: 28px 24px;
            text-align: center;
            border-right: 1px solid var(--border);
        }

        .data-strip-item:last-child {
            border-right: none;
        }

        .data-strip-number {
            font-size: 32px;
            font-weight: 800;
            color: var(--primary);
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .data-strip-label {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* 通用 section */
        .section {
            padding: var(--section-padding) 0;
        }

        .section-alt {
            background: var(--bg-alt);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .section-header {
            margin-bottom: 40px;
            max-width: 680px;
        }

        .section-header h2 {
            font-size: clamp(26px, 3vw, 32px);
            font-weight: 800;
            color: var(--text);
            line-height: 1.3;
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }

        .section-header p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* 核心工具矩阵 */
        .tools-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .tool-card {
            background: var(--card);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            gap: 12px;
            position: relative;
            overflow: hidden;
        }

        .tool-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--primary);
            opacity: 0;
            transition: opacity var(--transition);
        }

        .tool-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--primary);
        }

        .tool-card:hover::before {
            opacity: 1;
        }

        .tool-card-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 24px;
            font-weight: 700;
        }

        .tool-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.3px;
        }

        .tool-card p {
            font-size: 14.5px;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
        }

        .tool-card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            transition: gap var(--transition);
        }

        .tool-card-link:hover {
            gap: 10px;
        }

        .tool-card-link svg {
            width: 16px;
            height: 16px;
        }

        /* 优势数据区 */
        .advantage-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .advantage-item {
            background: var(--bg-alt);
            border-radius: var(--radius-card);
            padding: 32px 24px;
            text-align: center;
            transition: all var(--transition);
        }

        .advantage-item:hover {
            background: #E8EEF8;
            transform: translateY(-2px);
        }

        .advantage-number {
            font-size: 40px;
            font-weight: 800;
            color: var(--primary);
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
            margin-bottom: 8px;
        }

        .advantage-label {
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 600;
        }

        /* 使用流程 */
        .flow-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            position: relative;
        }

        .flow-step {
            text-align: center;
            padding: 24px 16px;
            position: relative;
        }

        .flow-step-number {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            border: 2px solid var(--primary);
            color: var(--primary);
            font-weight: 800;
            font-size: 20px;
            margin: 0 auto 16px;
            background: var(--card);
            position: relative;
            z-index: 2;
            transition: all var(--transition);
        }

        .flow-step:hover .flow-step-number {
            background: var(--primary);
            color: #fff;
        }

        .flow-step h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }

        .flow-step p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .flow-step::after {
            content: '';
            position: absolute;
            top: 48px;
            left: calc(50% + 32px);
            right: calc(-50% + 32px);
            height: 1px;
            background: var(--border);
            z-index: 1;
        }

        .flow-step:last-child::after {
            display: none;
        }

        /* 场景专题区 */
        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .scenario-card {
            background: var(--card);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .scenario-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--primary);
        }

        .scenario-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        .scenario-card-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex: 1;
        }

        .scenario-card h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--text);
        }

        .scenario-card p {
            font-size: 14.5px;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
        }

        .scenario-tag {
            display: inline-block;
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            align-self: flex-start;
        }

        /* 实时数据展示 */
        .simulator-panel {
            background: var(--card);
            border-radius: 24px;
            box-shadow: var(--shadow-hover);
            overflow: hidden;
            border: 1px solid var(--border);
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
        }

        .simulator-form {
            padding: 36px 32px;
            background: var(--bg-alt);
            border-right: 1px solid var(--border);
        }

        .simulator-form h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 20px;
        }

        .form-group {
            margin-bottom: 16px;
        }

        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 6px;
        }

        .form-group input,
        .form-group select {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            font-size: 14px;
            color: var(--text);
            background: var(--card);
            transition: border-color var(--transition);
        }

        .form-group input:focus,
        .form-group select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
            outline: none;
        }

        .simulator-result {
            padding: 36px 32px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .simulator-result h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 20px;
        }

        .probability-bar {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 14px;
        }

        .probability-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            min-width: 48px;
        }

        .probability-track {
            flex: 1;
            height: 8px;
            background: var(--bg-alt);
            border-radius: 4px;
            overflow: hidden;
        }

        .probability-fill {
            height: 100%;
            border-radius: 4px;
            transition: width 0.6s ease;
        }

        .probability-fill.home {
            background: var(--primary);
        }
        .probability-fill.draw {
            background: var(--accent);
        }
        .probability-fill.away {
            background: var(--secondary);
        }

        .probability-value {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            font-variant-numeric: tabular-nums;
            min-width: 40px;
            text-align: right;
        }

        .recommendation {
            margin-top: 16px;
            padding: 16px;
            background: var(--primary-soft);
            border-radius: 12px;
            border: 1px solid rgba(37, 99, 235, 0.2);
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
        }

        /* 品牌介绍 */
        .brand-intro {
            background: var(--bg-alt);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .brand-intro .container {
            max-width: 860px;
            text-align: center;
        }

        .brand-intro h2 {
            font-size: clamp(26px, 3vw, 32px);
            font-weight: 800;
            color: var(--text);
            margin-bottom: 20px;
        }

        .brand-intro p {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-secondary);
            text-align: left;
        }

        /* 资讯列表 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .news-card {
            background: var(--card);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .news-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        .news-card img {
            width: 100%;
            height: 140px;
            object-fit: cover;
        }

        .news-card-body {
            padding: 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .news-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.4;
        }

        .news-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.5;
            flex: 1;
        }

        .news-date {
            font-size: 12px;
            color: var(--text-muted);
        }

        .news-tag {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            background: var(--bg-alt);
            color: var(--text-secondary);
            padding: 3px 8px;
            border-radius: 4px;
            align-self: flex-start;
        }

        /* 合作伙伴 */
        .partner-wall {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        .partner-logo {
            width: 130px;
            height: 56px;
            background: var(--bg-alt);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-muted);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }

        .partner-logo:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-soft);
        }

        /* FAQ */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: 12px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: var(--primary);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            font-weight: 600;
            font-size: 16px;
            color: var(--text);
            cursor: pointer;
            list-style: none;
            list-style-type: none;
            user-select: none;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary .faq-arrow {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            transition: transform var(--transition);
            color: var(--text-muted);
        }

        .faq-item[open] summary .faq-arrow {
            transform: rotate(180deg);
        }

        .faq-item[open] {
            background: var(--bg-alt);
        }

        .faq-answer {
            padding: 0 20px 16px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* 保障条 */
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .guarantee-item {
            display: flex;
            flex-direction: column;
            gap: 10px;
            padding: 24px;
            background: var(--card);
            border-radius: 12px;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }

        .guarantee-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
        }

        .guarantee-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--primary-soft);
            color: var(--primary);
            font-weight: 700;
            font-size: 18px;
        }

        .guarantee-item h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
        }

        .guarantee-item p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* 联系 / CTA */
        .cta-section {
            background: var(--card);
        }

        .cta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .cta-content h2 {
            font-size: clamp(26px, 3vw, 32px);
            font-weight: 800;
            color: var(--text);
            margin-bottom: 12px;
        }

        .cta-content p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .cta-form {
            background: var(--bg-alt);
            padding: 32px;
            border-radius: 16px;
            border: 1px solid var(--border);
        }

        .cta-form .form-group {
            margin-bottom: 16px;
        }

        .cta-form .btn {
            width: 100%;
            margin-top: 8px;
        }

        /* 页脚 */
        .footer {
            background: #0F172A;
            color: #CBD5E0;
            padding: 60px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-brand h3 {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: #94A3B8;
            max-width: 280px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            font-size: 14px;
            color: #94A3B8;
            transition: color var(--transition);
        }

        .footer-col ul li a:hover {
            color: #fff;
        }

        .footer-bottom {
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: #64748B;
        }

        .footer-bottom a {
            color: #94A3B8;
        }

        .footer-bottom a:hover {
            color: #fff;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .tools-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .advantage-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .guarantee-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .simulator-panel {
                grid-template-columns: 1fr;
            }
            .simulator-form {
                border-right: none;
                border-bottom: 1px solid var(--border);
            }
            .hero .container {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-image img {
                height: 280px;
            }
            .cta-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: var(--section-padding-mobile) 0;
            }
            .header-top {
                flex-wrap: wrap;
            }
            .header-search {
                order: 3;
                max-width: 100%;
                flex-basis: 100%;
            }
            .mobile-menu-btn {
                display: block;
            }
            .header-nav {
                overflow-x: auto;
                gap: 6px;
                padding-bottom: 8px;
            }
            .nav-pill {
                font-size: 13px;
                padding: 6px 14px;
            }
            .hero {
                padding: 48px 0;
            }
            .hero h1 {
                font-size: 28px;
            }
            .hero p {
                font-size: 16px;
            }
            .hero-stats {
                gap: 20px;
            }
            .hero-stat-number {
                font-size: 22px;
            }
            .data-strip .container {
                grid-template-columns: repeat(2, 1fr);
            }
            .data-strip-item {
                padding: 20px 12px;
                border-right: none;
                border-bottom: 1px solid var(--border);
            }
            .data-strip-item:nth-child(3),
            .data-strip-item:nth-child(4) {
                border-bottom: none;
            }
            .data-strip-number {
                font-size: 26px;
            }
            .tools-grid {
                grid-template-columns: 1fr;
            }
            .advantage-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .advantage-number {
                font-size: 32px;
            }
            .flow-steps {
                grid-template-columns: 1fr;
                gap: 0;
            }
            .flow-step::after {
                display: none;
            }
            .scenarios-grid {
                grid-template-columns: 1fr;
            }
            .scenario-card img {
                height: 160px;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .guarantee-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-form {
                padding: 20px;
            }
            .simulator-form,
            .simulator-result {
                padding: 24px 18px;
            }
            .hero-image img {
                height: 220px;
            }
            .hero-image-overlay {
                padding: 16px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .btn {
                padding: 10px 18px;
                font-size: 14px;
            }
            .btn-lg {
                padding: 12px 22px;
                font-size: 15px;
            }
            .hero h1 {
                font-size: 24px;
            }
            .hero p {
                font-size: 15px;
            }
            .section-header h2 {
                font-size: 22px;
            }
            .hero-image img {
                height: 180px;
            }
            .advantage-grid {
                grid-template-columns: 1fr;
            }
            .data-strip .container {
                grid-template-columns: 1fr 1fr;
            }
            .partner-logo {
                width: 100px;
                height: 44px;
                font-size: 12px;
            }
            .tool-card {
                padding: 20px 16px;
            }
            .scenario-card-body {
                padding: 18px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #2563EB;
            --primary-hover: #1D4ED8;
            --primary-soft: rgba(37, 99, 235, 0.08);
            --secondary: #16A34A;
            --secondary-hover: #15803D;
            --bg: #F8FAFC;
            --bg-alt: #F1F5F9;
            --card: #FFFFFF;
            --text: #0F172A;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --accent: #F59E0B;
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-pill: 999px;
            --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 8px 32px rgba(37, 99, 235, 0.18);
            --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --transition: 0.2s ease;
            --section-padding: 80px;
            --section-padding-mobile: 48px;
            --container-max: 1200px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-secondary);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 3px solid rgba(37, 99, 235, 0.3);
            outline-offset: 2px;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            background: none;
            color: inherit;
        }
        button {
            cursor: pointer;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        /* 导航 */
        .header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--card);
            border-bottom: 1px solid var(--border);
            transition: box-shadow var(--transition);
        }
        .header.scrolled {
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.08);
        }
        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
        }
        .header-search {
            flex: 1;
            max-width: 360px;
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-alt);
            border-radius: var(--radius-pill);
            padding: 8px 16px;
            border: 1px solid var(--border);
            transition: border-color var(--transition);
        }
        .header-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }
        .header-search svg {
            flex-shrink: 0;
            width: 18px;
            height: 18px;
            color: var(--text-muted);
        }
        .header-search input {
            flex: 1;
            font-size: 14px;
            color: var(--text);
            background: transparent;
            border: none;
            outline: none;
        }
        .header-search input::placeholder {
            color: var(--text-muted);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            transition: all var(--transition);
            white-space: nowrap;
            border: 1px solid transparent;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            border-color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-secondary:hover {
            background: rgba(37, 99, 235, 0.05);
            transform: translateY(-2px);
        }
        .btn-success {
            background: var(--secondary);
            color: #fff;
            border-color: var(--secondary);
        }
        .btn-success:hover {
            background: var(--secondary-hover);
            border-color: var(--secondary-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(22, 163, 74, 0.3);
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 14px;
        }
        .btn-lg {
            padding: 14px 28px;
            font-size: 16px;
        }
        .header-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 0 12px;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .header-nav::-webkit-scrollbar {
            display: none;
        }
        .nav-pill {
            flex-shrink: 0;
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-alt);
            border: 1px solid var(--border);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-pill:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: #fff;
        }
        .nav-pill.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            font-weight: 600;
        }
        /* 面包屑 */
        .breadcrumb-bar {
            padding: 20px 0 12px;
            border-bottom: 1px solid var(--border);
            background: var(--card);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
        }
        .breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            font-size: 12px;
        }
        .breadcrumb .current {
            color: var(--text);
            font-weight: 500;
        }
        /* 分类页主体 */
        .category-hero {
            padding: 48px 0 40px;
            background: var(--bg);
        }
        .category-hero .container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .category-hero-text h1 {
            font-size: 36px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .category-hero-text h1 .hl {
            color: var(--primary);
        }
        .category-hero-text p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 20px;
        }
        .category-hero-img {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            aspect-ratio: 16/10;
        }
        .category-hero-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .hero-meta-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 8px;
        }
        .hero-meta-tags .tag {
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 500;
            background: var(--primary-soft);
            color: var(--primary);
            border: 1px solid rgba(37, 99, 235, 0.15);
        }
        /* 计算器工具 */
        .calculator-section {
            padding: 40px 0 var(--section-padding);
            background: var(--bg-alt);
        }
        .calculator-section .container {
            max-width: var(--container-max);
        }
        .section-heading {
            margin-bottom: 32px;
        }
        .section-heading h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.3;
            margin-bottom: 8px;
        }
        .section-heading p {
            font-size: 15px;
            color: var(--text-secondary);
        }
        .calculator-grid {
            display: grid;
            grid-template-columns: 1fr 1.1fr;
            gap: 24px;
            align-items: start;
        }
        .calc-panel {
            background: var(--card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            padding: 28px;
            border: 1px solid var(--border);
        }
        .calc-panel h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .calc-panel h3 .icon-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--primary);
            flex-shrink: 0;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-label {
            display: block;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            margin-bottom: 6px;
        }
        .form-input,
        .form-select {
            width: 100%;
            padding: 10px 14px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--border);
            background: #fff;
            font-size: 15px;
            color: var(--text);
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .form-input:focus,
        .form-select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
            outline: none;
        }
        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }
        .form-row-3 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 12px;
        }
        .result-panel {
            background: var(--card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            padding: 28px;
            border: 1px solid var(--border);
        }
        .result-panel h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .result-panel h3 .icon-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--secondary);
            flex-shrink: 0;
        }
        .prob-bar-item {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 14px;
        }
        .prob-bar-label {
            width: 72px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            flex-shrink: 0;
        }
        .prob-bar-track {
            flex: 1;
            height: 10px;
            background: var(--bg-alt);
            border-radius: var(--radius-pill);
            overflow: hidden;
        }
        .prob-bar-fill {
            height: 100%;
            border-radius: var(--radius-pill);
            transition: width 0.4s ease;
        }
        .prob-bar-fill.home {
            background: var(--primary);
        }
        .prob-bar-fill.draw {
            background: var(--accent);
        }
        .prob-bar-fill.away {
            background: var(--secondary);
        }
        .prob-bar-value {
            width: 48px;
            text-align: right;
            font-size: 14px;
            font-weight: 700;
            color: var(--text);
            font-variant-numeric: tabular-nums;
            flex-shrink: 0;
        }
        .result-summary {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 12px;
            margin: 20px 0;
        }
        .result-summary-item {
            background: var(--bg-alt);
            border-radius: 10px;
            padding: 14px;
            text-align: center;
        }
        .result-summary-item .value {
            font-size: 20px;
            font-weight: 700;
            color: var(--text);
            font-variant-numeric: tabular-nums;
        }
        .result-summary-item .label {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 2px;
        }
        .result-note {
            background: var(--primary-soft);
            border: 1px solid rgba(37, 99, 235, 0.15);
            border-radius: 10px;
            padding: 12px 16px;
            font-size: 14px;
            color: var(--primary);
            line-height: 1.5;
            margin-top: 16px;
        }
        /* 计算规则 */
        .rules-section {
            padding: var(--section-padding) 0;
            background: var(--bg);
        }
        .rules-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .rule-card {
            background: var(--card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            padding: 24px;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .rule-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }
        .rule-card .rule-index {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .rule-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }
        .rule-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        /* 数据支撑区 */
        .data-support-section {
            padding: var(--section-padding) 0;
            background: var(--bg-alt);
        }
        .data-support-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
        }
        .data-support-img {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            aspect-ratio: 16/9;
        }
        .data-support-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .data-support-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .data-support-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            color: var(--text-secondary);
            padding: 8px 0;
        }
        .data-support-list li .bullet {
            flex-shrink: 0;
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: var(--primary-soft);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 700;
            margin-top: 2px;
        }
        /* 使用建议 */
        .tips-section {
            padding: var(--section-padding) 0;
            background: var(--bg);
        }
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
        }
        .tip-item {
            background: var(--card);
            border-radius: 12px;
            padding: 18px 16px;
            border: 1px solid var(--border);
            text-align: center;
            transition: all var(--transition);
        }
        .tip-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
        }
        .tip-item .tip-number {
            font-size: 24px;
            font-weight: 800;
            color: var(--primary);
            font-variant-numeric: tabular-nums;
            margin-bottom: 6px;
        }
        .tip-item p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.5;
        }
        /* 相关工具推荐 */
        .related-tools {
            padding: var(--section-padding) 0;
            background: var(--bg-alt);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .related-card {
            background: var(--card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            padding: 22px;
            border: 1px solid var(--border);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .related-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }
        .related-card .related-badge {
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-soft);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 3px 10px;
            border-radius: var(--radius-pill);
            width: fit-content;
        }
        .related-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
        }
        .related-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .related-card .arrow {
            font-size: 18px;
            color: var(--primary);
            margin-top: auto;
            transition: transform var(--transition);
        }
        .related-card:hover .arrow {
            transform: translateX(4px);
        }
        /* FAQ */
        .faq-section {
            padding: var(--section-padding) 0;
            background: var(--bg);
        }
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--card);
            border-radius: 12px;
            border: 1px solid var(--border);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-item details {
            width: 100%;
        }
        .faq-item summary {
            padding: 18px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            transition: background var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary:hover {
            background: var(--bg-alt);
        }
        .faq-item summary .faq-icon {
            font-size: 20px;
            font-weight: 300;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
            margin-left: 12px;
        }
        .faq-item details[open] summary {
            background: var(--bg-alt);
        }
        .faq-item details[open] summary .faq-icon {
            transform: rotate(45deg);
            color: var(--primary);
        }
        .faq-answer {
            padding: 0 20px 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .faq-answer p {
            margin-bottom: 8px;
        }
        .faq-answer p:last-child {
            margin-bottom: 0;
        }
        /* 页脚 */
        .footer {
            background: #0F172A;
            color: #CBD5E1;
            padding: 48px 0 20px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand h3 {
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.6;
            color: #94A3B8;
            max-width: 320px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 12px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: #94A3B8;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 16px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: space-between;
            font-size: 13px;
            color: #64748B;
        }
        /* 响应式 */
        @media (max-width: 1024px) {
            .category-hero .container {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .category-hero-img {
                aspect-ratio: 16/9;
            }
            .calculator-grid {
                grid-template-columns: 1fr;
            }
            .data-support-grid {
                grid-template-columns: 1fr;
            }
            .rules-grid {
                grid-template-columns: 1fr 1fr;
            }
            .tips-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .related-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            :root {
                --section-padding: 48px;
            }
            .header-top {
                padding: 10px 0;
                gap: 12px;
            }
            .logo {
                font-size: 17px;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 15px;
                border-radius: 8px;
            }
            .header-search {
                max-width: none;
                padding: 6px 10px;
            }
            .header-search input {
                font-size: 13px;
                width: 60px;
            }
            .header-nav {
                gap: 6px;
                padding: 6px 0 10px;
            }
            .nav-pill {
                padding: 5px 12px;
                font-size: 13px;
            }
            .breadcrumb-bar {
                padding: 14px 0 8px;
            }
            .category-hero {
                padding: 28px 0 24px;
            }
            .category-hero-text h1 {
                font-size: 28px;
            }
            .calculator-grid {
                gap: 16px;
            }
            .calc-panel,
            .result-panel {
                padding: 20px;
            }
            .form-row,
            .form-row-3 {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .rules-grid {
                grid-template-columns: 1fr;
            }
            .tips-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .result-summary {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .header-top {
                flex-wrap: wrap;
                gap: 8px;
            }
            .logo {
                font-size: 16px;
            }
            .header-search {
                order: 3;
                width: 100%;
                max-width: 100%;
                flex: none;
            }
            .header-search input {
                width: auto;
                flex: 1;
            }
            .category-hero-text h1 {
                font-size: 24px;
            }
            .calc-panel,
            .result-panel {
                padding: 16px;
                border-radius: 12px;
            }
            .prob-bar-item {
                gap: 8px;
            }
            .prob-bar-label {
                width: 56px;
                font-size: 13px;
            }
            .prob-bar-value {
                width: 42px;
                font-size: 13px;
            }
            .tips-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 6px;
                text-align: center;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #2563EB;
            --primary-hover: #1D4ED8;
            --primary-soft: rgba(37, 99, 235, 0.08);
            --secondary: #16A34A;
            --secondary-hover: #15803D;
            --secondary-soft: rgba(22, 163, 74, 0.08);
            --bg: #F8FAFC;
            --bg-alt: #F1F5F9;
            --card: #FFFFFF;
            --text: #0F172A;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --accent: #F59E0B;
            --accent-soft: rgba(245, 158, 11, 0.12);
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-pill: 999px;
            --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 8px 32px rgba(37, 99, 235, 0.18);
            --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --transition: 0.2s ease;
            --section-padding: 80px;
            --section-padding-mobile: 48px;
            --container-max: 1200px;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-secondary);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 3px solid rgba(37, 99, 235, 0.3);
            outline-offset: 2px;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            background: none;
            color: inherit;
        }
        button {
            cursor: pointer;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text);
            line-height: 1.3;
            margin: 0 0 16px;
            font-weight: 700;
        }
        h1 {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.25;
        }
        h2 {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.3;
        }
        h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.35;
        }
        p {
            margin: 0 0 16px;
        }
        ul,
        ol {
            margin: 0 0 16px;
            padding-left: 20px;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 导航 */
        .header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--card);
            border-bottom: 1px solid var(--border);
            transition: box-shadow var(--transition);
        }
        .header.scrolled {
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.08);
        }
        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
        }
        .header-search {
            flex: 1;
            max-width: 360px;
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-alt);
            border-radius: var(--radius-pill);
            padding: 8px 16px;
            border: 1px solid var(--border);
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .header-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }
        .header-search svg {
            flex-shrink: 0;
            width: 18px;
            height: 18px;
            color: var(--text-muted);
        }
        .header-search input {
            flex: 1;
            font-size: 14px;
            color: var(--text);
            background: transparent;
            border: none;
            outline: none;
            min-width: 0;
        }
        .header-search input::placeholder {
            color: var(--text-muted);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            transition: all var(--transition);
            white-space: nowrap;
            border: 1px solid transparent;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            border-color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-secondary:hover {
            background: rgba(37, 99, 235, 0.05);
            transform: translateY(-2px);
        }
        .btn-success {
            background: var(--secondary);
            color: #fff;
            border-color: var(--secondary);
        }
        .btn-success:hover {
            background: var(--secondary-hover);
            border-color: var(--secondary-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(22, 163, 74, 0.3);
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 14px;
        }
        .btn-lg {
            padding: 14px 28px;
            font-size: 16px;
        }
        .header-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 0 12px;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .header-nav::-webkit-scrollbar {
            display: none;
        }
        .nav-pill {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-alt);
            border: 1px solid var(--border);
            transition: all var(--transition);
            white-space: nowrap;
            flex-shrink: 0;
        }
        .nav-pill:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .nav-pill.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            font-weight: 600;
        }

        /* 面包屑 */
        .breadcrumb-section {
            padding: 24px 0 0;
            background: var(--bg);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
        }
        .breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .separator {
            color: var(--text-muted);
            font-size: 12px;
        }
        .breadcrumb .current {
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* 分类页 Hero / 介绍区 */
        .page-intro {
            padding: 32px 0 48px;
            background: var(--bg);
        }
        .page-intro .container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .page-intro-content h1 {
            margin-bottom: 20px;
            font-size: 38px;
        }
        .page-intro-content p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 0;
        }
        .page-intro-image {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            aspect-ratio: 4/3;
        }
        .page-intro-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* 计算器工具主体 */
        .calculator-section {
            padding: var(--section-padding) 0;
            background: var(--bg-alt);
        }
        .calculator-section .section-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .calculator-section .section-header h2 {
            margin-bottom: 12px;
        }
        .calculator-section .section-header p {
            color: var(--text-muted);
            font-size: 15px;
            max-width: 560px;
            margin: 0 auto;
        }
        .calculator-panel {
            background: var(--card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            max-width: 960px;
            margin: 0 auto;
        }
        .calculator-input {
            padding: 32px;
            border-right: 1px solid var(--border);
            background: var(--card);
        }
        .calculator-input h3 {
            margin-bottom: 24px;
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            margin-bottom: 6px;
        }
        .form-group input,
        .form-group select {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            background: #fff;
            font-size: 15px;
            color: var(--text);
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .form-group input:focus,
        .form-group select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
            outline: none;
        }
        .form-group input::placeholder {
            color: var(--text-muted);
        }
        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .calc-actions {
            margin-top: 24px;
            display: flex;
            gap: 12px;
        }
        .calc-actions .btn {
            flex: 1;
        }
        .calculator-output {
            padding: 32px;
            background: #FBFCFE;
            display: flex;
            flex-direction: column;
        }
        .calculator-output h3 {
            margin-bottom: 20px;
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
        }
        .result-placeholder {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            flex: 1;
            color: var(--text-muted);
            font-size: 14px;
            text-align: center;
            gap: 12px;
        }
        .result-placeholder svg {
            width: 48px;
            height: 48px;
            color: var(--border);
        }
        .result-content {
            display: none;
            flex-direction: column;
            gap: 16px;
            flex: 1;
        }
        .result-content.visible {
            display: flex;
        }
        .prob-item {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .prob-label {
            width: 60px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            flex-shrink: 0;
        }
        .prob-bar-wrap {
            flex: 1;
            height: 8px;
            background: var(--bg-alt);
            border-radius: var(--radius-pill);
            overflow: hidden;
        }
        .prob-bar {
            height: 100%;
            border-radius: var(--radius-pill);
            transition: width 0.5s ease;
        }
        .prob-bar.home {
            background: var(--primary);
        }
        .prob-bar.draw {
            background: var(--accent);
        }
        .prob-bar.away {
            background: var(--secondary);
        }
        .prob-value {
            width: 48px;
            font-size: 14px;
            font-weight: 700;
            color: var(--text);
            text-align: right;
            font-variant-numeric: tabular-nums;
            flex-shrink: 0;
        }
        .expectancy-box {
            background: var(--primary-soft);
            border-radius: var(--radius-btn);
            padding: 16px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .expectancy-box .label {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
        }
        .expectancy-box .value {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            font-variant-numeric: tabular-nums;
        }
        .recommendation-box {
            background: var(--secondary-soft);
            border-radius: var(--radius-btn);
            padding: 16px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .recommendation-box .label {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
        }
        .recommendation-box .value {
            font-size: 18px;
            font-weight: 700;
            color: var(--secondary);
        }

        /* 计算规则说明 */
        .rules-section {
            padding: var(--section-padding) 0;
            background: var(--bg);
        }
        .rules-section .section-header {
            margin-bottom: 40px;
            text-align: center;
        }
        .rules-section .section-header h2 {
            margin-bottom: 12px;
        }
        .rules-section .section-header p {
            color: var(--text-muted);
            font-size: 15px;
            max-width: 560px;
            margin: 0 auto;
        }
        .rules-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .rule-card {
            background: var(--card);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .rule-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(37, 99, 235, 0.3);
        }
        .rule-card .rule-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            color: var(--primary);
            font-weight: 700;
            font-size: 18px;
        }
        .rule-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }
        .rule-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* 数据支撑区 */
        .data-support-section {
            padding: var(--section-padding) 0;
            background: var(--bg-alt);
        }
        .data-support-section .container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .data-support-content h2 {
            margin-bottom: 20px;
        }
        .data-support-content p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 24px;
        }
        .data-dimension-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .data-dimension-list li {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 15px;
            color: var(--text-secondary);
            padding: 12px 16px;
            background: var(--card);
            border-radius: var(--radius-btn);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .data-dimension-list li:hover {
            border-color: var(--primary);
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.08);
        }
        .data-dimension-list .dim-icon {
            width: 28px;
            height: 28px;
            border-radius: 6px;
            background: var(--primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--primary);
            flex-shrink: 0;
            font-weight: 600;
        }
        .data-support-image {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            aspect-ratio: 4/3;
        }
        .data-support-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* 使用建议 */
        .tips-section {
            padding: var(--section-padding) 0;
            background: var(--bg);
        }
        .tips-section .section-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .tips-section .section-header h2 {
            margin-bottom: 12px;
        }
        .tips-section .section-header p {
            color: var(--text-muted);
            font-size: 15px;
            max-width: 560px;
            margin: 0 auto;
        }
        .tips-list {
            max-width: 720px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .tip-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 20px 24px;
            background: var(--card);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .tip-item:hover {
            border-color: rgba(37, 99, 235, 0.25);
            box-shadow: var(--shadow-hover);
        }
        .tip-number {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .tip-item p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .tip-item strong {
            color: var(--text);
        }

        /* 相关工具推荐 */
        .related-tools-section {
            padding: var(--section-padding) 0;
            background: var(--bg-alt);
        }
        .related-tools-section .section-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .related-tools-section .section-header h2 {
            margin-bottom: 12px;
        }
        .related-tools-section .section-header p {
            color: var(--text-muted);
            font-size: 15px;
            max-width: 560px;
            margin: 0 auto;
        }
        .related-tools-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            max-width: 900px;
            margin: 0 auto;
        }
        .related-tool-card {
            background: var(--card);
            border-radius: var(--radius-card);
            padding: 24px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            text-align: left;
        }
        .related-tool-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(37, 99, 235, 0.3);
        }
        .related-tool-card .tool-tag {
            display: inline-block;
            padding: 4px 12px;
            background: var(--primary-soft);
            color: var(--primary);
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 12px;
            align-self: flex-start;
        }
        .related-tool-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .related-tool-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 16px;
            flex: 1;
        }
        .related-tool-card .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition);
        }
        .related-tool-card .card-link:hover {
            gap: 10px;
        }

        /* FAQ */
        .faq-section {
            padding: var(--section-padding) 0;
            background: var(--bg);
        }
        .faq-section .section-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .faq-section .section-header h2 {
            margin-bottom: 12px;
        }
        .faq-section .section-header p {
            color: var(--text-muted);
            font-size: 15px;
            max-width: 560px;
            margin: 0 auto;
        }
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--card);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item[open] {
            box-shadow: var(--shadow-sm);
            border-color: rgba(37, 99, 235, 0.25);
        }
        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 24px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            list-style: none;
            user-select: none;
            min-height: 48px;
            transition: background var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary:hover {
            background: var(--bg-alt);
        }
        .faq-item summary .faq-icon {
            width: 20px;
            height: 20px;
            flex-shrink: 0;
            transition: transform var(--transition);
            color: var(--text-muted);
        }
        .faq-item[open] summary .faq-icon {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* 页脚 */
        .footer {
            background: #0F172A;
            color: #CBD5E1;
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            margin-bottom: 24px;
        }
        .footer-brand h3 {
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 14px;
            color: #94A3B8;
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 320px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul a {
            font-size: 14px;
            color: #94A3B8;
            transition: color var(--transition);
        }
        .footer-col ul a:hover {
            color: #fff;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding: 20px 0;
            font-size: 13px;
            color: #64748B;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            h1 {
                font-size: 32px;
            }
            h2 {
                font-size: 24px;
            }
            .page-intro .container {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .page-intro-content h1 {
                font-size: 30px;
            }
            .rules-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .data-support-section .container {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .data-support-image {
                order: -1;
            }
            .related-tools-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-padding: 48px;
            }
            h1 {
                font-size: 28px;
            }
            h2 {
                font-size: 22px;
            }
            .header-top {
                gap: 12px;
                padding: 10px 0;
            }
            .header-search {
                max-width: 180px;
                padding: 6px 12px;
            }
            .logo {
                font-size: 17px;
                gap: 8px;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 15px;
                border-radius: 8px;
            }
            .btn-sm {
                padding: 6px 12px;
                font-size: 13px;
            }
            .page-intro .container {
                gap: 24px;
            }
            .page-intro-content h1 {
                font-size: 24px;
            }
            .calculator-panel {
                grid-template-columns: 1fr;
            }
            .calculator-input {
                border-right: none;
                border-bottom: 1px solid var(--border);
                padding: 24px;
            }
            .calculator-output {
                padding: 24px;
            }
            .form-row {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .rules-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .related-tools-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            h1 {
                font-size: 24px;
            }
            h2 {
                font-size: 20px;
            }
            .header-top {
                flex-wrap: nowrap;
                gap: 8px;
            }
            .header-search {
                max-width: 120px;
                padding: 4px 8px;
            }
            .header-search input {
                font-size: 12px;
            }
            .btn-sm {
                padding: 5px 10px;
                font-size: 12px;
                white-space: nowrap;
            }
            .nav-pill {
                padding: 6px 12px;
                font-size: 13px;
            }
            .page-intro {
                padding: 20px 0 32px;
            }
            .calculator-input,
            .calculator-output {
                padding: 20px;
            }
            .rule-card {
                padding: 20px 16px;
            }
            .related-tool-card {
                padding: 20px;
            }
            .faq-item summary {
                padding: 14px 18px;
                font-size: 14px;
            }
            .faq-item .faq-answer {
                padding: 0 18px 16px;
                font-size: 13px;
            }
            .calc-actions {
                flex-direction: column;
            }
        }

/* roulang page: category4 */
:root {
            --primary: #2563EB;
            --primary-hover: #1D4ED8;
            --primary-soft: rgba(37, 99, 235, 0.08);
            --secondary: #16A34A;
            --secondary-hover: #15803D;
            --bg: #F8FAFC;
            --bg-alt: #F1F5F9;
            --card: #FFFFFF;
            --text: #0F172A;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --accent: #F59E0B;
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-pill: 999px;
            --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 8px 32px rgba(37, 99, 235, 0.18);
            --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --transition: 0.2s ease;
            --section-padding: 80px;
            --section-padding-mobile: 48px;
            --container-max: 1200px;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            box-sizing: border-box;
        }

        *,
        *::before,
        *::after {
            box-sizing: inherit;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-secondary);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        main {
            flex: 1;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--primary);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 3px solid rgba(37, 99, 235, 0.3);
            outline-offset: 2px;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text);
            line-height: 1.3;
            font-weight: 700;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 导航 */
        .header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--card);
            border-bottom: 1px solid var(--border);
            transition: box-shadow var(--transition);
        }

        .header.scrolled {
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.08);
        }

        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: 0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .logo:hover {
            color: var(--primary);
        }

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .header-search {
            flex: 1;
            max-width: 360px;
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-alt);
            border-radius: var(--radius-pill);
            padding: 8px 16px;
            border: 1px solid var(--border);
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .header-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }

        .header-search svg {
            flex-shrink: 0;
            width: 18px;
            height: 18px;
            color: var(--text-muted);
        }

        .header-search input {
            flex: 1;
            font-size: 14px;
            color: var(--text);
            background: transparent;
            border: none;
            outline: none;
            width: 100%;
        }

        .header-search input::placeholder {
            color: var(--text-muted);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            transition: all var(--transition);
            white-space: nowrap;
            border: 1px solid transparent;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            border-color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
            color: #fff;
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn-secondary:hover {
            background: rgba(37, 99, 235, 0.05);
            transform: translateY(-2px);
            color: var(--primary);
        }

        .btn-success {
            background: var(--secondary);
            color: #fff;
            border-color: var(--secondary);
        }

        .btn-success:hover {
            background: var(--secondary-hover);
            border-color: var(--secondary-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(22, 163, 74, 0.3);
            color: #fff;
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 14px;
        }

        .btn-lg {
            padding: 14px 28px;
            font-size: 16px;
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 0 12px;
            overflow-x: auto;
            scrollbar-width: none;
            -webkit-overflow-scrolling: touch;
        }

        .header-nav::-webkit-scrollbar {
            display: none;
        }

        .nav-pill {
            display: inline-flex;
            align-items: center;
            flex-shrink: 0;
            padding: 7px 18px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 500;
            background: var(--bg-alt);
            color: var(--text-secondary);
            border: 1px solid var(--border);
            transition: all var(--transition);
            white-space: nowrap;
        }

        .nav-pill:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-soft);
        }

        .nav-pill.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            font-weight: 600;
        }

        /* 面包屑 */
        .breadcrumb {
            padding: 24px 0 0;
            font-size: 14px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-muted);
        }

        .breadcrumb a:hover {
            color: var(--primary);
        }

        .breadcrumb .sep {
            color: var(--text-muted);
            font-size: 12px;
        }

        .breadcrumb .current {
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* 页面头部 */
        .page-header {
            padding: 32px 0 24px;
        }

        .page-header h1 {
            font-size: 40px;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
            color: var(--text);
        }

        .page-header .page-subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 720px;
        }

        /* section 通用 */
        .section {
            padding: var(--section-padding) 0;
        }

        .section-alt {
            background: var(--bg-alt);
        }

        .section-title {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 680px;
            margin-bottom: 36px;
        }

        /* 分类介绍区 */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .intro-content p {
            font-size: 16px;
            margin-bottom: 14px;
            color: var(--text-secondary);
        }

        .intro-content p strong {
            color: var(--text);
            font-weight: 600;
        }

        .intro-image {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .intro-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 4/3;
        }

        /* 计算器工具主体 */
        .calc-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: stretch;
        }

        .calc-panel {
            background: var(--card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            padding: 32px;
            border: 1px solid var(--border);
        }

        .calc-panel h2 {
            font-size: 20px;
            margin-bottom: 20px;
            padding-bottom: 14px;
            border-bottom: 1px solid var(--border);
        }

        .form-group {
            margin-bottom: 18px;
        }

        .form-group label {
            display: block;
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 500;
            margin-bottom: 6px;
        }

        .form-group input,
        .form-group select {
            width: 100%;
            padding: 11px 14px;
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            font-size: 15px;
            color: var(--text);
            background: #fff;
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .form-group input:focus,
        .form-group select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
            outline: none;
        }

        .form-group input::placeholder {
            color: var(--text-muted);
        }

        .bet-input-row {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 10px;
        }

        .bet-input-row .match-label {
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 500;
            flex-shrink: 0;
            min-width: 60px;
        }

        .bet-input-row input {
            flex: 1;
            padding: 9px 14px;
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            font-size: 15px;
            color: var(--text);
            background: #fff;
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .bet-input-row input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
            outline: none;
        }

        .result-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0;
            border-bottom: 1px solid var(--border);
        }

        .result-item:last-child {
            border-bottom: none;
        }

        .result-item .label {
            font-size: 14px;
            color: var(--text-secondary);
        }

        .result-item .value {
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
            font-variant-numeric: tabular-nums;
        }

        .result-item .value.positive {
            color: var(--secondary);
        }

        .result-item .value.negative {
            color: #DC2626;
        }

        .result-item .value.highlight {
            color: var(--primary);
        }

        .result-note {
            margin-top: 20px;
            padding: 14px 16px;
            background: var(--primary-soft);
            border-radius: var(--radius-btn);
            font-size: 14px;
            color: var(--text-secondary);
            border-left: 3px solid var(--primary);
        }

        .result-note strong {
            color: var(--primary);
            font-weight: 600;
        }

        /* 规则卡片 */
        .rules-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .rule-card {
            background: var(--card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            padding: 24px;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }

        .rule-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }

        .rule-card .rule-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: var(--primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 14px;
        }

        .rule-card h3 {
            font-size: 17px;
            margin-bottom: 8px;
            color: var(--text);
        }

        .rule-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* 数据支撑区 */
        .data-support-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 40px;
            align-items: center;
        }

        .data-support-image img {
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
        }

        .data-table {
            background: var(--card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            border: 1px solid var(--border);
        }

        .data-table table {
            width: 100%;
            border-collapse: collapse;
            font-size: 14px;
        }

        .data-table th {
            background: var(--bg-alt);
            font-weight: 600;
            color: var(--text);
            text-align: left;
            padding: 12px 16px;
            border-bottom: 1px solid var(--border);
            white-space: nowrap;
        }

        .data-table td {
            padding: 12px 16px;
            border-bottom: 1px solid var(--border);
            color: var(--text-secondary);
            font-variant-numeric: tabular-nums;
        }

        .data-table tr:last-child td {
            border-bottom: none;
        }

        .data-table td:first-child {
            font-weight: 500;
            color: var(--text);
        }

        .tag {
            display: inline-flex;
            align-items: center;
            padding: 4px 10px;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 500;
            background: var(--primary-soft);
            color: var(--primary);
        }

        .tag-green {
            background: rgba(22, 163, 74, 0.1);
            color: var(--secondary);
        }

        /* 使用建议 */
        .tips-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 14px;
        }

        .tip-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            background: var(--card);
            border-radius: var(--radius-card);
            padding: 18px 22px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }

        .tip-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
        }

        .tip-item .tip-num {
            flex-shrink: 0;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .tip-item p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .tip-item p strong {
            color: var(--text);
            font-weight: 600;
        }

        /* 相关工具推荐 */
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .related-card {
            background: var(--card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            padding: 24px;
            border: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            transition: all var(--transition);
        }

        .related-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }

        .related-card h3 {
            font-size: 17px;
            margin-bottom: 8px;
            color: var(--text);
        }

        .related-card p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 16px;
            flex: 1;
        }

        .related-card .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .related-card .card-link:hover {
            gap: 8px;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            overflow: hidden;
        }

        .faq-item summary {
            padding: 18px 24px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: background var(--transition);
            list-style: none;
            user-select: none;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary:hover {
            background: var(--bg-alt);
        }

        .faq-item summary .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform var(--transition);
            color: var(--text-muted);
            font-size: 16px;
        }

        .faq-item[open] summary .faq-icon {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-item .faq-answer {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            border-top: 1px solid var(--border);
            padding-top: 16px;
            margin-top: 0;
        }

        /* 页脚 */
        .footer {
            background: #0F172A;
            color: #CBD5E1;
            padding: 48px 0 24px;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-brand h3 {
            color: #fff;
            font-size: 20px;
            margin-bottom: 14px;
            font-weight: 700;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: #94A3B8;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 14px;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul a {
            font-size: 14px;
            color: #94A3B8;
            transition: color var(--transition);
        }

        .footer-col ul a:hover {
            color: #fff;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 20px;
            font-size: 13px;
            color: #64748B;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .rules-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .related-grid {
                grid-template-columns: repeat(3, 1fr);
            }

            .data-support-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .intro-grid {
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-padding: var(--section-padding-mobile);
            }

            .header-top {
                flex-wrap: wrap;
                gap: 10px;
                padding: 10px 0;
            }

            .header-search {
                order: 3;
                max-width: 100%;
                flex-basis: 100%;
            }

            .header-nav {
                gap: 6px;
                padding: 6px 0 10px;
                margin: 0 -4px;
            }

            .nav-pill {
                padding: 6px 14px;
                font-size: 13px;
            }

            .page-header h1 {
                font-size: 28px;
            }

            .section-title {
                font-size: 22px;
            }

            .intro-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .intro-image img {
                aspect-ratio: 16/9;
            }

            .calc-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .calc-panel {
                padding: 20px;
            }

            .rules-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .data-table {
                overflow-x: auto;
            }

            .data-table table {
                min-width: 520px;
            }

            .result-item .value {
                font-size: 18px;
            }

            .btn-lg {
                padding: 12px 20px;
                font-size: 15px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 14px;
            }

            .header-top {
                gap: 8px;
            }

            .logo {
                font-size: 17px;
                gap: 6px;
            }

            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 15px;
                border-radius: 8px;
            }

            .btn-sm {
                padding: 6px 12px;
                font-size: 13px;
            }

            .page-header h1 {
                font-size: 24px;
                letter-spacing: 0;
            }

            .page-header .page-subtitle {
                font-size: 15px;
            }

            .breadcrumb {
                font-size: 12px;
                padding: 16px 0 0;
            }

            .section {
                padding: 36px 0;
            }

            .section-title {
                font-size: 20px;
            }

            .section-desc {
                font-size: 14px;
                margin-bottom: 24px;
            }

            .calc-panel {
                padding: 16px;
                border-radius: 12px;
            }

            .calc-panel h2 {
                font-size: 17px;
            }

            .form-group label {
                font-size: 13px;
            }

            .form-group input,
            .form-group select {
                font-size: 14px;
                padding: 9px 12px;
            }

            .bet-input-row {
                gap: 8px;
            }

            .bet-input-row .match-label {
                font-size: 13px;
                min-width: 50px;
            }

            .result-item {
                padding: 12px 0;
            }

            .result-item .value {
                font-size: 16px;
            }

            .rule-card {
                padding: 18px;
                border-radius: 12px;
            }

            .rule-card h3 {
                font-size: 15px;
            }

            .tip-item {
                padding: 14px 16px;
                border-radius: 12px;
            }

            .tip-item p {
                font-size: 14px;
            }

            .faq-item summary {
                padding: 14px 16px;
                font-size: 14px;
            }

            .faq-item .faq-answer {
                padding: 0 16px 16px;
                font-size: 13px;
                padding-top: 12px;
            }

            .related-card {
                padding: 18px;
                border-radius: 12px;
            }

            .footer {
                padding: 32px 0 16px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
                padding-bottom: 20px;
            }

            .footer-brand h3 {
                font-size: 18px;
            }

            .footer-col h4 {
                font-size: 14px;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #2563EB;
            --primary-hover: #1D4ED8;
            --primary-soft: rgba(37, 99, 235, 0.08);
            --secondary: #16A34A;
            --secondary-hover: #15803D;
            --secondary-soft: rgba(22, 163, 74, 0.08);
            --bg: #F8FAFC;
            --bg-alt: #F1F5F9;
            --card: #FFFFFF;
            --text: #0F172A;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --accent: #F59E0B;
            --accent-soft: rgba(245, 158, 11, 0.1);
            --danger: #EF4444;
            --danger-soft: rgba(239, 68, 68, 0.08);
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-pill: 999px;
            --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 8px 32px rgba(37, 99, 235, 0.18);
            --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.04);
            --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --transition: 0.2s ease;
            --section-padding: 80px;
            --section-padding-mobile: 48px;
            --container-max: 1200px;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            font-size: 16px;
        }

        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-secondary);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition), background var(--transition), border-color var(--transition);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 3px solid rgba(37, 99, 235, 0.3);
            outline-offset: 2px;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 导航 ===== */
        .header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--card);
            border-bottom: 1px solid var(--border);
            transition: box-shadow var(--transition);
        }

        .header.scrolled {
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.08);
        }

        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .header-search {
            flex: 1;
            max-width: 360px;
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-alt);
            border-radius: var(--radius-pill);
            padding: 8px 16px;
            border: 1px solid var(--border);
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .header-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }

        .header-search svg {
            flex-shrink: 0;
            width: 18px;
            height: 18px;
            color: var(--text-muted);
        }

        .header-search input {
            flex: 1;
            font-size: 14px;
            color: var(--text);
            background: transparent;
            border: none;
            outline: none;
            min-width: 0;
        }

        .header-search input::placeholder {
            color: var(--text-muted);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            transition: all var(--transition);
            white-space: nowrap;
            border: 1px solid transparent;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            border-color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn-secondary:hover {
            background: rgba(37, 99, 235, 0.05);
            transform: translateY(-2px);
        }

        .btn-success {
            background: var(--secondary);
            color: #fff;
            border-color: var(--secondary);
        }

        .btn-success:hover {
            background: var(--secondary-hover);
            border-color: var(--secondary-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(22, 163, 74, 0.3);
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 14px;
        }

        .btn-lg {
            padding: 14px 28px;
            font-size: 16px;
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 0 12px;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .header-nav::-webkit-scrollbar {
            display: none;
        }

        .nav-pill {
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            background: var(--bg-alt);
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: all var(--transition);
            border: 1px solid var(--border);
            flex-shrink: 0;
        }

        .nav-pill:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: #fff;
        }

        .nav-pill.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* ===== 面包屑 & 页面头部 ===== */
        .page-hero {
            padding: 40px 0 24px;
            background: var(--bg);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--primary);
        }

        .breadcrumb .separator {
            color: var(--text-muted);
            opacity: 0.6;
        }

        .breadcrumb .current {
            color: var(--text-secondary);
            font-weight: 600;
        }

        .page-hero h1 {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text);
            letter-spacing: 0.3px;
        }

        .page-hero .subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            margin-top: 8px;
            max-width: 720px;
        }

        /* ===== 分类介绍区 ===== */
        .intro-section {
            padding: 24px 0 0;
        }

        .intro-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 40px;
            align-items: center;
            background: var(--card);
            border-radius: var(--radius-xl);
            padding: 40px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
        }

        .intro-content h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.35;
            margin-bottom: 16px;
        }

        .intro-content p {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 12px;
        }

        .intro-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 16px;
        }

        .intro-tag {
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            border: 1px solid rgba(37, 99, 235, 0.15);
        }

        .intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: var(--bg-alt);
        }

        .intro-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-lg);
        }

        /* ===== 计算器工具主体 ===== */
        .tool-section {
            padding: 40px 0 24px;
        }

        .tool-panel {
            display: grid;
            grid-template-columns: 1fr 1.05fr;
            gap: 28px;
            background: var(--card);
            border-radius: var(--radius-xl);
            padding: 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
        }

        .tool-input-panel {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .tool-input-panel .panel-header {
            display: flex;
            align-items: center;
            gap: 10px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--bg-alt);
        }

        .tool-input-panel .panel-header h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
        }

        .tool-input-panel .panel-header .badge {
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: var(--radius-pill);
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .form-group label {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-secondary);
            letter-spacing: 0.3px;
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }

        .form-row-3 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 12px;
        }

        .form-input,
        .form-select {
            padding: 10px 14px;
            border-radius: var(--radius-btn);
            background: var(--bg);
            border: 1px solid var(--border);
            font-size: 14px;
            color: var(--text);
            transition: border-color var(--transition), box-shadow var(--transition);
            width: 100%;
        }

        .form-input:focus,
        .form-select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
            outline: none;
        }

        .form-input::placeholder {
            color: var(--text-muted);
        }

        .calc-actions {
            display: flex;
            gap: 12px;
            margin-top: 8px;
            flex-wrap: wrap;
        }

        .tool-result-panel {
            display: flex;
            flex-direction: column;
            gap: 20px;
            background: var(--bg-alt);
            border-radius: var(--radius-lg);
            padding: 24px;
        }

        .tool-result-panel .panel-header {
            display: flex;
            align-items: center;
            gap: 10px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--border);
        }

        .tool-result-panel .panel-header h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
        }

        .result-metrics {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
        }

        .result-metric {
            background: var(--card);
            border-radius: var(--radius-md);
            padding: 16px;
            text-align: center;
            border: 1px solid var(--border);
        }

        .result-metric .metric-label {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 600;
            margin-bottom: 4px;
        }

        .result-metric .metric-value {
            font-size: 24px;
            font-weight: 800;
            color: var(--primary);
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
        }

        .result-metric .metric-value.green {
            color: var(--secondary);
        }

        .result-metric .metric-value.amber {
            color: var(--accent);
        }

        .result-probability {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .prob-row {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .prob-label {
            width: 70px;
            font-size: 13px;
            font-weight: 700;
            color: var(--text);
            flex-shrink: 0;
        }

        .prob-bar {
            flex: 1;
            height: 8px;
            background: var(--border);
            border-radius: var(--radius-pill);
            overflow: hidden;
        }

        .prob-bar-fill {
            height: 100%;
            border-radius: var(--radius-pill);
            background: var(--primary);
            transition: width 0.6s ease;
        }

        .prob-bar-fill.secondary {
            background: var(--secondary);
        }

        .prob-bar-fill.accent {
            background: var(--accent);
        }

        .prob-percent {
            width: 48px;
            text-align: right;
            font-size: 14px;
            font-weight: 700;
            color: var(--text);
            font-variant-numeric: tabular-nums;
            flex-shrink: 0;
        }

        .result-alert {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 14px 16px;
            border-radius: var(--radius-md);
            background: var(--accent-soft);
            border: 1px solid rgba(245, 158, 11, 0.3);
        }

        .result-alert.warning {
            background: var(--danger-soft);
            border-color: rgba(239, 68, 68, 0.3);
        }

        .result-alert .alert-icon {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            color: var(--accent);
            margin-top: 2px;
        }

        .result-alert.warning .alert-icon {
            color: var(--danger);
        }

        .result-alert p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .result-alert p strong {
            color: var(--text);
        }

        /* ===== 计算规则说明 ===== */
        .rules-section {
            padding: 24px 0 0;
        }

        .rules-section .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 20px;
        }

        .rules-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .rule-card {
            background: var(--card);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }

        .rule-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .rule-card .rule-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: var(--primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 14px;
            color: var(--primary);
        }

        .rule-card h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }

        .rule-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .rule-card .rule-formula {
            display: inline-block;
            background: var(--bg-alt);
            padding: 8px 14px;
            border-radius: var(--radius-btn);
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            margin-top: 10px;
            font-family: 'Courier New', monospace;
            letter-spacing: 0.5px;
        }

        /* ===== 数据支撑区 ===== */
        .data-section {
            padding: 24px 0 0;
        }

        .data-panel {
            background: var(--card);
            border-radius: var(--radius-xl);
            padding: 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
        }

        .data-panel .data-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 20px;
            flex-wrap: wrap;
            gap: 12px;
        }

        .data-panel .data-header h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text);
        }

        .data-panel .data-header .data-badge {
            background: var(--secondary-soft);
            color: var(--secondary);
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 600;
        }

        .data-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .data-card {
            background: var(--bg-alt);
            border-radius: var(--radius-md);
            padding: 18px;
            text-align: center;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }

        .data-card:hover {
            border-color: var(--primary);
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        .data-card .data-value {
            font-size: 28px;
            font-weight: 800;
            color: var(--primary);
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .data-card .data-value.green {
            color: var(--secondary);
        }

        .data-card .data-label {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 600;
        }

        /* ===== 使用建议 ===== */
        .tips-section {
            padding: 24px 0 0;
        }

        .tips-section .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 20px;
        }

        .tips-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .tip-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            background: var(--card);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            transition: border-color var(--transition);
        }

        .tip-item:hover {
            border-color: var(--primary);
        }

        .tip-number {
            flex-shrink: 0;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .tip-item p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        .tip-item p strong {
            color: var(--text);
        }

        /* ===== 相关工具推荐 ===== */
        .related-section {
            padding: 24px 0 0;
        }

        .related-section .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 20px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .related-card {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--card);
            border-radius: var(--radius-lg);
            padding: 20px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }

        .related-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            border-color: var(--primary);
        }

        .related-card .related-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            flex-shrink: 0;
            font-size: 22px;
            font-weight: 700;
        }

        .related-card .related-info h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 4px;
        }

        .related-card .related-info p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        .related-card .arrow-icon {
            margin-left: auto;
            flex-shrink: 0;
            color: var(--text-muted);
            transition: color var(--transition), transform var(--transition);
        }

        .related-card:hover .arrow-icon {
            color: var(--primary);
            transform: translateX(4px);
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 24px 0 0;
        }

        .faq-section .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 20px;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .faq-item:hover {
            border-color: var(--primary);
        }

        .faq-item details {
            display: block;
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            cursor: pointer;
            list-style: none;
            gap: 12px;
            user-select: none;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: '';
            flex-shrink: 0;
            width: 10px;
            height: 10px;
            border-right: 2px solid var(--text-muted);
            border-bottom: 2px solid var(--text-muted);
            transform: rotate(45deg) translateY(-2px);
            transition: transform var(--transition);
        }

        .faq-item details[open] summary::after {
            transform: rotate(225deg) translateY(-2px);
        }

        .faq-item .faq-answer {
            padding: 0 20px 18px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            background: transparent;
        }

        .faq-item details[open] {
            background: var(--bg-alt);
        }

        /* ===== 底部 CTA ===== */
        .cta-section {
            padding: 24px 0 0;
        }

        .cta-panel {
            background: var(--text);
            border-radius: var(--radius-xl);
            padding: 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
            flex-wrap: wrap;
        }

        .cta-panel .cta-content h3 {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }

        .cta-panel .cta-content p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.7);
            max-width: 520px;
        }

        .cta-panel .cta-buttons {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .cta-panel .btn-white {
            background: #fff;
            color: var(--text);
            border-color: #fff;
        }

        .cta-panel .btn-white:hover {
            background: var(--bg-alt);
            border-color: var(--bg-alt);
            transform: translateY(-2px);
        }

        .cta-panel .btn-outline-white {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.4);
        }

        .cta-panel .btn-outline-white:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }

        /* ===== 页脚 ===== */
        .footer {
            background: #0F172A;
            color: rgba(255, 255, 255, 0.8);
            margin-top: 48px;
        }

        .footer .container {
            padding-top: 56px;
            padding-bottom: 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand h3 {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.65);
            max-width: 340px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            transition: color var(--transition);
        }

        .footer-col ul li a:hover {
            color: #fff;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 24px;
                padding: 28px;
            }

            .tool-panel {
                grid-template-columns: 1fr;
                gap: 20px;
                padding: 24px;
            }

            .data-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }

            .rules-grid {
                grid-template-columns: 1fr;
            }

            .page-hero h1 {
                font-size: 30px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-padding: 48px;
            }

            .container {
                padding: 0 18px;
            }

            .header-top {
                gap: 12px;
                padding: 10px 0;
            }

            .logo {
                font-size: 17px;
                gap: 8px;
            }

            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 15px;
                border-radius: 8px;
            }

            .header-search {
                max-width: none;
                flex: 1;
                padding: 6px 12px;
            }

            .header-search input {
                font-size: 13px;
            }

            .btn-sm {
                padding: 7px 14px;
                font-size: 13px;
            }

            .header-nav {
                padding: 6px 0 10px;
                gap: 6px;
            }

            .nav-pill {
                padding: 6px 14px;
                font-size: 13px;
            }

            .page-hero {
                padding: 28px 0 16px;
            }

            .page-hero h1 {
                font-size: 26px;
            }

            .page-hero .subtitle {
                font-size: 15px;
            }

            .breadcrumb {
                font-size: 13px;
                margin-bottom: 12px;
            }

            .intro-grid {
                padding: 20px;
                border-radius: var(--radius-lg);
            }

            .intro-content h2 {
                font-size: 21px;
            }

            .intro-content p {
                font-size: 15px;
            }

            .intro-tag {
                font-size: 12px;
                padding: 5px 12px;
            }

            .tool-panel {
                padding: 18px;
                border-radius: var(--radius-lg);
            }

            .form-row,
            .form-row-3 {
                grid-template-columns: 1fr;
            }

            .result-metrics {
                grid-template-columns: 1fr 1fr 1fr;
                gap: 8px;
            }

            .result-metric {
                padding: 12px;
            }

            .result-metric .metric-value {
                font-size: 20px;
            }

            .rules-section .section-title,
            .tips-section .section-title,
            .related-section .section-title,
            .faq-section .section-title {
                font-size: 22px;
                margin-bottom: 16px;
            }

            .rule-card {
                padding: 18px;
            }

            .data-panel {
                padding: 22px;
                border-radius: var(--radius-lg);
            }

            .data-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }

            .data-card .data-value {
                font-size: 24px;
            }

            .tips-list {
                gap: 10px;
            }

            .tip-item {
                padding: 14px 16px;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .cta-panel {
                padding: 28px 22px;
                border-radius: var(--radius-lg);
            }

            .cta-panel .cta-content h3 {
                font-size: 20px;
            }

            .footer .container {
                padding-top: 40px;
                padding-bottom: 20px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
                margin-bottom: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 14px;
            }

            .header-top {
                flex-wrap: wrap;
                gap: 8px;
            }

            .header-search {
                order: 3;
                width: 100%;
                max-width: none;
            }

            .btn-sm {
                font-size: 12px;
                padding: 6px 12px;
            }

            .logo {
                font-size: 16px;
            }

            .page-hero h1 {
                font-size: 22px;
            }

            .intro-grid {
                padding: 16px;
                gap: 16px;
            }

            .intro-content h2 {
                font-size: 18px;
            }

            .tool-panel {
                padding: 14px;
                gap: 16px;
            }

            .result-metrics {
                grid-template-columns: 1fr;
                gap: 8px;
            }

            .result-metric .metric-value {
                font-size: 22px;
            }

            .rule-card h4 {
                font-size: 15px;
            }

            .data-grid {
                grid-template-columns: 1fr;
                gap: 8px;
            }

            .faq-item summary {
                font-size: 14px;
                padding: 14px 16px;
            }

            .faq-item .faq-answer {
                font-size: 14px;
                padding: 0 16px 14px;
            }
        }