/* roulang page: index */
:root {
            --brand-deep: #1F5E7D;
            --brand-light: #E7F2F8;
            --bg-warm: #FBFCFD;
            --card-bg: #FFFFFF;
            --text-main: #1C3543;
            --text-sub: #5B7586;
            --border-line: #D9E7EF;
            --accent-orange: #F28C28;
            --accent-hover: #D4771F;
            --success-green: #2E9E6B;
            --warning-red: #C0392B;
            --radius-card: 14px;
            --radius-btn: 50px;
            --radius-input: 10px;
            --radius-tag: 6px;
            --radius-img: 16px;
            --shadow-card: 0 4px 16px rgba(31, 94, 125, 0.08);
            --shadow-card-hover: 0 10px 30px rgba(31, 94, 125, 0.15);
            --shadow-btn: 0 6px 16px rgba(242, 140, 40, 0.25);
            --section-gap: 88px;
            --font-stack: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 80px;
        }

        body {
            font-family: var(--font-stack);
            background: var(--bg-warm);
            color: var(--text-main);
            font-size: 16px;
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            color: var(--brand-deep);
            transition: color 0.2s ease;
        }

        a:hover {
            color: var(--accent-orange);
        }

        ul,
        ol {
            list-style: none;
        }

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

        .container-custom {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .section-padding {
            padding: var(--section-gap) 0;
        }

        .section-title {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-main);
            text-align: center;
            margin-bottom: 14px;
        }

        .section-lead {
            font-size: 17px;
            color: var(--text-sub);
            text-align: center;
            max-width: 680px;
            margin: 0 auto 48px;
            line-height: 1.8;
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 56px;
            }
            .section-title {
                font-size: 24px;
            }
            .section-lead {
                font-size: 15px;
                margin-bottom: 32px;
            }
        }

        /* ----- 按钮 ----- */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            padding: 12px 32px;
            font-size: 16px;
            line-height: 1.4;
            transition: all 0.25s ease;
            border: 1.5px solid transparent;
            cursor: pointer;
        }

        .btn-cta {
            background: var(--accent-orange);
            color: #fff;
            border-color: var(--accent-orange);
            box-shadow: 0 2px 8px rgba(242, 140, 40, 0.2);
        }

        .btn-cta:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-btn);
        }

        .btn-outline {
            background: transparent;
            color: var(--brand-deep);
            border: 1.5px solid var(--brand-deep);
        }

        .btn-outline:hover {
            background: var(--brand-deep);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(31, 94, 125, 0.18);
        }

        .btn-lg {
            padding: 16px 44px;
            font-size: 17px;
        }

        /* ----- 导航栏 ----- */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1040;
            background: var(--card-bg);
            box-shadow: 0 2px 16px rgba(31, 94, 125, 0.06);
            border-bottom: 1px solid var(--border-line);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .brand-icon {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--brand-deep);
            border-radius: 50%;
            flex-shrink: 0;
        }

        .brand-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--brand-deep);
            letter-spacing: 0.5px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .main-nav .nav-link {
            font-size: 16px;
            font-weight: 500;
            color: var(--text-sub);
            padding: 24px 0;
            position: relative;
            transition: color 0.2s;
            white-space: nowrap;
        }

        .main-nav .nav-link::after {
            content: "";
            position: absolute;
            bottom: 16px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-orange);
            transition: width 0.3s;
            border-radius: 2px;
        }

        .main-nav .nav-link:hover,
        .main-nav .nav-link.active {
            color: var(--brand-deep);
        }

        .main-nav .nav-link:hover::after,
        .main-nav .nav-link.active::after {
            width: 100%;
        }

        .nav-cta {
            margin-left: 12px;
        }

        .nav-cta .btn {
            padding: 10px 26px;
            font-size: 15px;
            white-space: nowrap;
        }

        .navbar-toggler {
            display: none;
            background: none;
            border: 1px solid var(--border-line);
            border-radius: 10px;
            width: 44px;
            height: 44px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: background 0.2s;
        }

        .navbar-toggler:hover {
            background: var(--brand-light);
        }

        .navbar-toggler span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--brand-deep);
            margin: 3px auto;
            border-radius: 2px;
            transition: 0.3s;
        }

        @media (max-width: 1024px) {
            .main-nav {
                gap: 18px;
            }
            .main-nav .nav-link {
                font-size: 15px;
            }
            .nav-cta .btn {
                padding: 8px 20px;
                font-size: 14px;
            }
        }

        @media (max-width: 768px) {
            .navbar-toggler {
                display: flex;
                flex-direction: column;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 12px 24px 24px;
                border-bottom: 1px solid var(--border-line);
                box-shadow: 0 12px 32px rgba(31, 94, 125, 0.1);
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav .nav-link {
                padding: 12px 0;
                border-bottom: 1px solid #f0f5f8;
                font-size: 16px;
            }
            .main-nav .nav-link::after {
                display: none;
            }
            .main-nav .nav-link.active {
                color: var(--accent-orange);
            }
            .nav-cta {
                margin: 16px 0 0;
            }
            .nav-cta .btn {
                width: 100%;
                justify-content: center;
                padding: 14px 24px;
            }
        }

        /* ----- Hero ----- */
        .hero {
            position: relative;
            min-height: 90vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #F2F8FB 0%, var(--brand-light) 100%);
            padding: 100px 0;
            overflow: hidden;
        }

        .hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.35;
            z-index: 0;
        }

        .hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(255, 255, 255, 0.82);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 820px;
            padding: 0 24px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(231, 242, 248, 0.95);
            border: 1px solid var(--border-line);
            color: var(--brand-deep);
            font-size: 13px;
            font-weight: 600;
            padding: 8px 20px;
            border-radius: 50px;
            margin-bottom: 28px;
            letter-spacing: 0.3px;
            animation: fadeUp 0.6s ease-out both;
        }

        .hero-badge i {
            color: var(--accent-orange);
        }

        .hero h1 {
            font-size: 44px;
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-main);
            margin-bottom: 20px;
            letter-spacing: 1px;
            animation: fadeUp 0.6s 0.1s ease-out both;
        }

        .hero h1 .highlight {
            color: var(--brand-deep);
            position: relative;
            display: inline-block;
        }

        .hero h1 .highlight::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 4px;
            width: 100%;
            height: 8px;
            background: rgba(242, 140, 40, 0.2);
            border-radius: 4px;
            z-index: -1;
        }

        .hero-subtitle {
            font-size: 17px;
            color: var(--text-sub);
            line-height: 1.8;
            max-width: 600px;
            margin: 0 auto 36px;
            animation: fadeUp 0.6s 0.2s ease-out both;
        }

        .hero-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
            animation: fadeUp 0.6s 0.3s ease-out both;
        }

        .hero-scroll {
            position: absolute;
            bottom: 28px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 2;
            color: var(--text-sub);
            font-size: 22px;
            animation: bounceDown 2s infinite;
        }

        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes bounceDown {
            0%,
            100% {
                transform: translateX(-50%) translateY(0);
            }
            50% {
                transform: translateX(-50%) translateY(8px);
            }
        }

        @media (max-width: 768px) {
            .hero {
                min-height: 88vh;
                padding: 70px 0;
            }
            .hero h1 {
                font-size: 30px;
                line-height: 1.3;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .hero-buttons .btn {
                width: 100%;
                max-width: 280px;
            }
        }

        /* ----- 卖点区 ----- */
        .features-section {
            background: var(--bg-warm);
        }

        .feature-row {
            display: flex;
            align-items: center;
            gap: 56px;
            margin-bottom: 72px;
        }

        .feature-row:last-child {
            margin-bottom: 0;
        }

        .feature-row.reverse {
            flex-direction: row-reverse;
        }

        .feature-image {
            flex: 1;
        }

        .feature-image .img-wrap {
            border-radius: var(--radius-img);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: box-shadow 0.3s, transform 0.3s;
        }

        .feature-image .img-wrap:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }

        .feature-image img {
            width: 100%;
            height: 340px;
            object-fit: cover;
        }

        .feature-info {
            flex: 1;
        }

        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--brand-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            color: var(--brand-deep);
            font-size: 20px;
        }

        .feature-info h3 {
            font-size: 24px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 14px;
            line-height: 1.4;
        }

        .feature-info p {
            font-size: 16px;
            color: var(--text-sub);
            line-height: 1.8;
            margin-bottom: 18px;
        }

        .feature-link {
            font-size: 15px;
            font-weight: 600;
            color: var(--accent-orange);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap 0.2s;
        }

        .feature-link:hover {
            gap: 12px;
            color: var(--accent-hover);
        }

        @media (max-width: 992px) {
            .feature-row,
            .feature-row.reverse {
                flex-direction: column;
                gap: 32px;
            }
            .feature-image img {
                height: 260px;
            }
            .feature-info {
                max-width: 100%;
            }
        }

        /* ----- 演示区 ----- */
        .demo-section {
            background: var(--brand-light);
            padding: var(--section-gap) 0;
        }

        .demo-mockup {
            max-width: 900px;
            margin: 0 auto 56px;
            background: #fff;
            border-radius: 20px;
            box-shadow: 0 16px 48px rgba(31, 94, 125, 0.14);
            overflow: hidden;
            border: 1px solid var(--border-line);
        }

        .demo-browser-bar {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 14px 20px;
            background: #f7fafc;
            border-bottom: 1px solid var(--border-line);
        }

        .demo-browser-bar .dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
        }

        .demo-browser-bar .dot:nth-child(1) {
            background: #ff5f57;
        }
        .demo-browser-bar .dot:nth-child(2) {
            background: #febc2e;
        }
        .demo-browser-bar .dot:nth-child(3) {
            background: #28c840;
        }

        .demo-browser-bar .url {
            flex: 1;
            background: #fff;
            border: 1px solid var(--border-line);
            border-radius: 20px;
            padding: 6px 18px;
            font-size: 13px;
            color: var(--text-sub);
            margin-left: 12px;
            overflow: hidden;
            white-space: nowrap;
            text-overflow: ellipsis;
        }

        .demo-screen {
            padding: 20px;
            background: var(--bg-warm);
        }

        .demo-screen img {
            width: 100%;
            height: 420px;
            object-fit: cover;
            border-radius: 12px;
        }

        .demo-steps {
            display: flex;
            align-items: flex-start;
            justify-content: center;
            gap: 0;
            max-width: 900px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .demo-step {
            flex: 1;
            text-align: center;
            padding: 0 20px;
            position: relative;
        }

        .demo-step:not(:last-child)::after {
            content: "";
            position: absolute;
            top: 28px;
            right: -20px;
            width: 40px;
            height: 2px;
            background: var(--border-line);
        }

        .demo-step-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--brand-deep);
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 6px 16px rgba(31, 94, 125, 0.2);
        }

        .demo-step h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .demo-step p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.6;
            max-width: 220px;
            margin: 0 auto;
        }

        @media (max-width: 768px) {
            .demo-mockup {
                margin-bottom: 40px;
            }
            .demo-screen img {
                height: 240px;
            }
            .demo-steps {
                flex-direction: column;
                gap: 36px;
            }
            .demo-step:not(:last-child)::after {
                display: none;
            }
            .demo-step {
                padding: 0 12px;
            }
        }

        /* ----- 证据区 ----- */
        .proof-section {
            background: var(--bg-warm);
        }

        .stats-row {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            margin-bottom: 64px;
        }

        .stat-item {
            text-align: center;
            background: #fff;
            border: 1px solid var(--border-line);
            border-radius: var(--radius-card);
            padding: 36px 48px;
            min-width: 200px;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .stat-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }

        .stat-number {
            font-size: 42px;
            font-weight: 700;
            color: var(--brand-deep);
            line-height: 1.2;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-sub);
            margin-top: 8px;
        }

        .testimonials {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .testimonial-card {
            background: #fff;
            border: 1px solid var(--border-line);
            border-left: 3px solid var(--accent-orange);
            border-radius: var(--radius-card);
            padding: 28px;
            box-shadow: var(--shadow-card);
            transition: box-shadow 0.3s, transform 0.3s;
        }

        .testimonial-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }

        .testimonial-text {
            font-size: 15px;
            color: var(--text-main);
            line-height: 1.8;
            margin-bottom: 18px;
            position: relative;
            padding-left: 20px;
        }

        .testimonial-text::before {
            content: "\201C";
            font-size: 40px;
            color: var(--accent-orange);
            position: absolute;
            left: 0;
            top: -8px;
            line-height: 1;
        }

        .testimonial-user {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .testimonial-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--brand-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-deep);
            font-size: 16px;
            font-weight: 600;
            flex-shrink: 0;
        }

        .testimonial-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
        }

        .testimonial-role {
            font-size: 12px;
            color: var(--text-sub);
        }

        @media (max-width: 992px) {
            .testimonials {
                grid-template-columns: 1fr;
                max-width: 600px;
                margin: 0 auto;
            }
        }

        @media (max-width: 576px) {
            .stats-row {
                flex-direction: column;
                align-items: center;
            }
            .stat-item {
                width: 100%;
                max-width: 300px;
                padding: 28px 24px;
            }
        }

        /* ----- 价格区 ----- */
        .pricing-section {
            background: #fff;
            padding: var(--section-gap) 0;
        }

        .pricing-cards {
            display: flex;
            justify-content: center;
            align-items: flex-start;
            gap: 32px;
            max-width: 920px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .pricing-card {
            flex: 1;
            background: var(--card-bg);
            border: 1.5px solid var(--border-line);
            border-radius: 20px;
            padding: 36px 32px;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s, box-shadow 0.3s;
            max-width: 420px;
        }

        .pricing-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }

        .pricing-card.featured {
            border-color: var(--brand-deep);
            box-shadow: 0 12px 32px rgba(31, 94, 125, 0.18);
            transform: scale(1.03);
            background: linear-gradient(145deg, #fff, var(--brand-light));
            position: relative;
        }

        .pricing-card.featured:hover {
            box-shadow: 0 16px 40px rgba(31, 94, 125, 0.22);
            transform: scale(1.03) translateY(-4px);
        }

        .pricing-tag {
            position: absolute;
            top: -12px;
            right: 28px;
            background: rgba(242, 140, 40, 0.15);
            color: var(--accent-hover);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 20px;
            border: 1px solid rgba(242, 140, 40, 0.3);
        }

        .pricing-name {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .pricing-price-wrap {
            display: flex;
            align-items: baseline;
            gap: 6px;
            margin-bottom: 24px;
        }

        .pricing-price {
            font-size: 42px;
            font-weight: 700;
            color: var(--brand-deep);
            line-height: 1.2;
        }

        .pricing-unit {
            font-size: 14px;
            color: var(--text-sub);
        }

        .pricing-features {
            margin-bottom: 28px;
        }

        .pricing-features li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 15px;
            color: var(--text-sub);
            padding: 7px 0;
            line-height: 1.6;
        }

        .pricing-features li i {
            color: var(--success-green);
            font-size: 14px;
            margin-top: 4px;
        }

        .pricing-features li.dim {
            opacity: 0.5;
        }

        .pricing-btn {
            width: 100%;
        }

        @media (max-width: 768px) {
            .pricing-cards {
                flex-direction: column;
                align-items: center;
            }
            .pricing-card,
            .pricing-card.featured {
                width: 100%;
                max-width: 420px;
                transform: none;
            }
            .pricing-card.featured {
                order: -1;
            }
            .pricing-card.featured:hover {
                transform: translateY(-4px);
            }
        }

        /* ----- 资讯列表 ----- */
        .news-section {
            background: var(--bg-warm);
            padding: var(--section-gap) 0;
        }

        .news-list {
            max-width: 920px;
            margin: 0 auto;
        }

        .news-item {
            display: flex;
            gap: 20px;
            padding: 24px 0;
            border-bottom: 1px solid var(--border-line);
            transition: background 0.2s;
        }

        .news-item:first-child {
            border-top: 1px solid var(--border-line);
        }

        .news-item:hover {
            background: rgba(231, 242, 248, 0.3);
        }

        .news-thumb {
            width: 80px;
            height: 80px;
            border-radius: 10px;
            overflow: hidden;
            flex-shrink: 0;
            background: var(--brand-light);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .news-thumb .no-image {
            color: var(--brand-deep);
            font-size: 26px;
        }

        .news-body {
            flex: 1;
            min-width: 0;
        }

        .news-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--brand-deep);
            line-height: 1.5;
            margin-bottom: 6px;
        }

        .news-title a {
            color: inherit;
            transition: color 0.2s;
        }

        .news-title a:hover {
            color: var(--accent-orange);
            text-decoration: underline;
        }

        .news-excerpt {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.6;
            margin-bottom: 8px;
            overflow: hidden;
            white-space: nowrap;
            text-overflow: ellipsis;
        }

        .news-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        .news-cat {
            font-size: 12px;
            color: var(--brand-deep);
            background: var(--brand-light);
            padding: 2px 12px;
            border-radius: 20px;
            font-weight: 500;
        }

        .news-date {
            font-size: 13px;
            color: var(--text-sub);
        }

        .news-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-orange);
            margin-left: auto;
            transition: letter-spacing 0.2s;
        }

        .news-link:hover {
            letter-spacing: 1px;
        }

        .empty-state {
            max-width: 920px;
            margin: 0 auto;
            background: var(--brand-light);
            border-radius: var(--radius-card);
            padding: 40px;
            text-align: center;
            border: 1px dashed var(--border-line);
        }

        .empty-icon {
            font-size: 36px;
            color: var(--brand-deep);
            margin-bottom: 12px;
        }

        .empty-state p {
            font-size: 15px;
            color: var(--text-sub);
            margin-bottom: 16px;
        }

        @media (max-width: 768px) {
            .news-item {
                flex-direction: row;
                padding: 18px 12px;
            }
            .news-thumb {
                width: 68px;
                height: 68px;
            }
            .news-title {
                font-size: 15px;
            }
            .news-link {
                margin-left: 0;
            }
            .news-meta {
                gap: 10px;
            }
        }

        /* ----- FAQ ----- */
        .faq-section {
            background: var(--brand-light);
            padding: var(--section-gap) 0;
        }

        .faq-wrap {
            max-width: 920px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .accordion-item {
            background: #fff;
            border: 1px solid var(--border-line);
            border-radius: var(--radius-card);
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(31, 94, 125, 0.04);
            transition: box-shadow 0.3s;
        }

        .accordion-item:focus-within,
        .accordion-item:hover {
            box-shadow: 0 6px 20px rgba(31, 94, 125, 0.1);
        }

        .accordion-button {
            background: #fff;
            color: var(--brand-deep);
            font-size: 17px;
            font-weight: 600;
            padding: 20px 24px;
            position: relative;
            border: none;
            transition: color 0.2s;
        }

        .accordion-button:not(.collapsed) {
            background: #fff;
            color: var(--brand-deep);
            box-shadow: none;
        }

        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(31, 94, 125, 0.12);
        }

        .accordion-button::after {
            display: none;
        }

        .accordion-button .faq-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--brand-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            color: var(--brand-deep);
            margin-left: auto;
            flex-shrink: 0;
            transition: transform 0.3s;
        }

        .accordion-button:not(.collapsed) .faq-icon {
            transform: rotate(45deg);
            background: var(--accent-orange);
            color: #fff;
        }

        .accordion-body {
            padding: 0 24px 24px;
            color: var(--text-sub);
            font-size: 15px;
            line-height: 1.8;
        }

        .accordion-item::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: transparent;
        }

        .accordion-item:has(.accordion-button:not(.collapsed))::before {
            background: var(--accent-orange);
        }

        /* ----- CTA 区 ----- */
        .cta-section {
            background: var(--brand-deep);
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.06;
        }

        .cta-content {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .cta-content h2 {
            font-size: 32px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .cta-content p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.8;
            margin-bottom: 32px;
        }

        .cta-content .btn-cta {
            background: var(--accent-orange);
            border-color: var(--accent-orange);
            padding: 16px 48px;
            font-size: 17px;
        }

        .cta-content .btn-cta:hover {
            background: #fff;
            color: var(--brand-deep);
            border-color: #fff;
        }

        @media (max-width: 768px) {
            .cta-content h2 {
                font-size: 24px;
            }
            .cta-content p {
                font-size: 15px;
            }
        }

        /* ----- 页脚 ----- */
        .site-footer {
            background: #113946;
            color: rgba(255, 255, 255, 0.75);
            padding: 64px 0 0;
        }

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

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }

        .footer-brand .brand-icon {
            width: 36px;
            height: 36px;
            background: rgba(255, 255, 255, 0.15);
        }

        .footer-brand-text {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 280px;
        }

        .footer-title {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

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

        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            transition: color 0.2s, padding-left 0.2s;
        }

        .footer-links a:hover {
            color: var(--accent-orange);
            padding-left: 4px;
        }

        .footer-contact {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.65);
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
        }

        .footer-contact i {
            width: 20px;
            color: var(--accent-orange);
            font-size: 14px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-bottom .heart {
            color: var(--accent-orange);
        }

        @media (max-width: 992px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .site-footer {
                padding-top: 48px;
            }
        }

        /* ----- 浮动 CTA ----- */
        .float-cta {
            position: fixed;
            right: 20px;
            bottom: 20px;
            z-index: 1050;
            background: var(--accent-orange);
            color: #fff;
            border: none;
            border-radius: 50px;
            padding: 14px 24px;
            font-size: 15px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 8px 24px rgba(242, 140, 40, 0.4);
            cursor: pointer;
            transition: transform 0.3s, box-shadow 0.3s, background 0.3s;
        }

        .float-cta:hover {
            background: var(--accent-hover);
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(242, 140, 40, 0.45);
        }

        .float-cta i {
            font-size: 18px;
        }

        @media (max-width: 768px) {
            .float-cta {
                padding: 10px 18px;
                font-size: 14px;
                right: 14px;
                bottom: 14px;
            }
        }

        /* ----- 通用组件辅助 ----- */
        .text-accent {
            color: var(--accent-orange);
        }

        .bg-light-blue {
            background: var(--brand-light);
        }

        .mt-1 {
            margin-top: 1rem;
        }
        .mt-2 {
            margin-top: 2rem;
        }
        .mt-3 {
            margin-top: 3rem;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }
        .mb-2 {
            margin-bottom: 2rem;
        }
        .mb-3 {
            margin-bottom: 3rem;
        }

/* roulang page: article */
:root {
            --primary: #1F5E7D;
            --primary-light: #E7F2F8;
            --bg: #FBFCFD;
            --card-bg: #FFFFFF;
            --text: #1C3543;
            --text-muted: #5B7586;
            --border: #D9E7EF;
            --accent: #F28C28;
            --accent-hover: #D4771F;
            --success: #2E9E6B;
            --warning: #C0392B;
            --radius: 14px;
            --radius-sm: 10px;
            --radius-lg: 16px;
            --shadow: 0 4px 16px rgba(31,94,125,0.08);
            --shadow-hover: 0 10px 30px rgba(31,94,125,0.15);
            --shadow-cta: 0 6px 16px rgba(242,140,40,0.25);
            --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --radius-btn: 50px;
            --transition: 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

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

        ul, ol {
            list-style: none;
        }

        .container-custom {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: #FFFFFF;
            border-bottom: 1px solid var(--border);
            height: 72px;
            display: flex;
            align-items: center;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-icon {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-light);
            border-radius: 50%;
            transition: transform var(--transition);
        }

        .brand:hover .brand-icon {
            transform: rotate(20deg);
        }

        .brand-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.5px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted);
            position: relative;
            padding: 10px 2px;
            letter-spacing: 0.2px;
            white-space: nowrap;
        }

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

        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .nav-cta {
            margin-left: 4px;
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 24px;
            background: var(--accent);
            color: #FFFFFF;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 14px;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            box-shadow: 0 2px 8px rgba(242,140,40,0.2);
            line-height: 1.4;
        }

        .btn-cta:hover {
            background: var(--accent-hover);
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: var(--shadow-cta);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 24px;
            background: transparent;
            color: var(--primary);
            border: 1.5px solid var(--primary);
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 14px;
            cursor: pointer;
            transition: all var(--transition);
        }

        .btn-outline:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
        }

        .navbar-toggler {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            z-index: 1001;
        }

        .navbar-toggler span {
            width: 24px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .navbar-toggler.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .navbar-toggler.active span:nth-child(2) {
            opacity: 0;
        }

        .navbar-toggler.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ===== Article Hero ===== */
        .article-hero {
            background: linear-gradient(135deg, #F2F8FB 0%, #E7F2F8 100%);
            padding: 56px 0 48px;
            border-bottom: 1px solid var(--border);
        }

        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .breadcrumb-nav a {
            color: var(--primary);
            font-weight: 500;
        }

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

        .breadcrumb-nav .sep {
            color: #B0C4D0;
            font-size: 12px;
        }

        .breadcrumb-nav .current {
            color: var(--text-muted);
            max-width: 500px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .article-title {
            font-size: 42px;
            font-weight: 700;
            line-height: 1.25;
            color: var(--text);
            margin-bottom: 24px;
            max-width: 900px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .meta-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255,255,255,0.8);
            border: 1px solid var(--border);
            color: var(--primary);
            font-size: 13px;
            padding: 6px 16px;
            border-radius: 50px;
            font-weight: 500;
        }

        .meta-tag i {
            font-size: 13px;
            color: var(--accent);
        }

        /* ===== Article Main ===== */
        .article-main {
            padding: 64px 0;
            background: var(--bg);
        }

        .article-content {
            max-width: 780px;
            margin: 0 auto;
            font-size: 17px;
            line-height: 1.8;
            color: var(--text);
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            padding: 48px;
            border: 1px solid var(--border);
        }

        .article-content p {
            margin-bottom: 24px;
        }

        .article-content h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
            margin: 40px 0 16px;
            padding-top: 8px;
            position: relative;
        }

        .article-content h2::before {
            content: '';
            display: block;
            width: 36px;
            height: 3px;
            background: var(--accent);
            border-radius: 3px;
            margin-bottom: 14px;
        }

        .article-content h3 {
            font-size: 22px;
            font-weight: 600;
            color: var(--text);
            margin: 32px 0 14px;
        }

        .article-content ul,
        .article-content ol {
            margin-bottom: 24px;
            padding-left: 20px;
        }

        .article-content ul li,
        .article-content ol li {
            margin-bottom: 10px;
            padding-left: 6px;
            position: relative;
        }

        .article-content ul li::before {
            content: '';
            position: absolute;
            left: -16px;
            top: 13px;
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
        }

        .article-content ol {
            padding-left: 22px;
        }

        .article-content ol li {
            list-style: decimal;
            padding-left: 4px;
        }

        .article-content blockquote {
            border-left: 4px solid var(--accent);
            background: var(--primary-light);
            padding: 18px 24px;
            margin: 32px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-muted);
            font-style: normal;
        }

        .article-content blockquote p {
            margin-bottom: 0;
        }

        .article-content img {
            border-radius: var(--radius-lg);
            margin: 28px auto;
            box-shadow: var(--shadow);
            max-width: 100%;
        }

        .article-content a {
            color: var(--primary);
            border-bottom: 1px solid var(--primary);
            font-weight: 500;
        }

        .article-content a:hover {
            color: var(--accent);
            border-bottom-color: var(--accent);
        }

        .article-content table {
            width: 100%;
            margin: 28px 0;
            border-collapse: collapse;
            font-size: 15px;
        }

        .article-content table th,
        .article-content table td {
            border: 1px solid var(--border);
            padding: 12px 16px;
            text-align: left;
        }

        .article-content table th {
            background: var(--primary-light);
            font-weight: 600;
            color: var(--primary);
        }

        /* ===== Article Not Found ===== */
        .article-not-found {
            text-align: center;
            padding: 80px 40px;
        }

        .article-not-found .not-found-icon {
            width: 72px;
            height: 72px;
            background: var(--primary-light);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 24px;
            font-size: 30px;
            color: var(--primary);
        }

        .article-not-found h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
        }

        .article-not-found p {
            color: var(--text-muted);
            margin-bottom: 28px;
            max-width: 420px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Post Nav ===== */
        .post-nav-wrap {
            max-width: 780px;
            margin: 48px auto 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 28px 0;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .post-nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--text);
            flex: 1;
            transition: all var(--transition);
            min-width: 0;
        }

        .post-nav-link:hover {
            color: var(--primary);
        }

        .post-nav-link i {
            font-size: 18px;
            color: var(--accent);
            flex-shrink: 0;
        }

        .post-nav-text {
            min-width: 0;
        }

        .post-nav-label {
            display: block;
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 2px;
        }

        .post-nav-title {
            font-size: 15px;
            font-weight: 500;
            color: inherit;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            display: block;
            max-width: 220px;
        }

        .post-nav-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-light);
            color: var(--primary);
            padding: 10px 20px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 500;
            transition: all var(--transition);
            flex-shrink: 0;
        }

        .post-nav-back:hover {
            background: var(--primary);
            color: #FFFFFF;
            transform: translateY(-2px);
        }

        .post-nav-link.next-post {
            justify-content: flex-end;
            text-align: right;
        }

        /* ===== Related Posts ===== */
        .related-posts-section {
            padding: 88px 0;
            background: var(--primary-light);
        }

        .related-posts-section .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .related-posts-section .section-header h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text);
            position: relative;
            display: inline-block;
        }

        .related-posts-section .section-header h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 48px;
            height: 3px;
            background: var(--accent);
            border-radius: 3px;
        }

        .related-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
            height: 100%;
            border: 1px solid var(--border);
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }

        .related-card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

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

        .related-card-tag {
            font-size: 12px;
            color: var(--accent);
            background: rgba(242,140,40,0.1);
            padding: 4px 12px;
            border-radius: 50px;
            display: inline-block;
            width: fit-content;
            margin-bottom: 12px;
            font-weight: 500;
        }

        .related-card-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 10px;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card-title a {
            color: inherit;
        }

        .related-card-title a:hover {
            color: var(--primary);
        }

        .related-card-summary {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }

        .related-card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-muted);
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }

        .related-card-meta i {
            font-size: 12px;
            color: var(--accent);
            margin-right: 4px;
        }

        /* ===== Comment Form ===== */
        .comment-section {
            padding: 88px 0;
            background: var(--bg);
        }

        .comment-wrap {
            max-width: 780px;
            margin: 0 auto;
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            padding: 40px;
            border: 1px solid var(--border);
        }

        .comment-wrap h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .comment-wrap h3 i {
            color: var(--accent);
        }

        .comment-subtitle {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 32px;
        }

        .comment-form .form-label {
            font-size: 14px;
            font-weight: 500;
            color: var(--text);
            margin-bottom: 8px;
        }

        .comment-form .form-control {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            height: 46px;
            font-size: 15px;
            color: var(--text);
            background: var(--bg);
            padding: 0 16px;
            transition: all var(--transition);
            box-shadow: none;
        }

        .comment-form .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(31,94,125,0.12);
            outline: none;
            background: #fff;
        }

        .comment-form textarea.form-control {
            height: auto;
            padding: 14px 16px;
            resize: vertical;
            min-height: 120px;
        }

        .comment-form .form-control::placeholder {
            color: #A0B4C0;
            font-size: 14px;
        }

        .comment-form .text-muted {
            font-size: 13px;
            color: var(--text-muted) !important;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #113946;
            color: rgba(255,255,255,0.85);
            padding: 64px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.4fr;
            gap: 48px;
            padding-bottom: 48px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-brand-text {
            font-size: 22px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: 0.5px;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255,255,255,0.65);
            max-width: 320px;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 2px;
            background: var(--accent);
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

        .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-contact {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .footer-contact li {
            color: rgba(255,255,255,0.65);
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-contact i {
            color: var(--accent);
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.12);
            padding: 20px 0;
            font-size: 13px;
            color: rgba(255,255,255,0.5);
            text-align: center;
            letter-spacing: 0.3px;
        }

        .footer-bottom .heart {
            color: var(--accent);
            margin: 0 4px;
        }

        /* ===== Float CTA ===== */
        .float-cta {
            position: fixed;
            right: 20px;
            bottom: 20px;
            z-index: 1050;
        }

        .float-cta .btn-cta {
            height: 56px;
            padding: 0 28px;
            border-radius: 50px;
            box-shadow: var(--shadow-cta);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
        }

        .float-cta .btn-cta i {
            font-size: 18px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .main-nav {
                gap: 20px;
            }
            .nav-link {
                font-size: 14px;
            }
            .article-title {
                font-size: 36px;
            }
            .related-card-img {
                height: 160px;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                height: 64px;
            }

            .navbar-toggler {
                display: flex;
            }

            .main-nav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: #FFFFFF;
                flex-direction: column;
                align-items: flex-start;
                padding: 24px 24px 32px;
                gap: 0;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 8px 24px rgba(31,94,125,0.12);
                transform: translateY(-120%);
                opacity: 0;
                visibility: hidden;
                transition: all 0.4s ease;
                z-index: 999;
            }

            .main-nav.nav-open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }

            .main-nav .nav-link {
                display: block;
                width: 100%;
                text-align: left;
                padding: 14px 0;
                font-size: 16px;
                color: var(--text);
                border-bottom: 1px solid rgba(217,231,239,0.6);
            }

            .main-nav .nav-link.active::after {
                display: none;
            }

            .main-nav .nav-link.active {
                color: var(--accent);
            }

            .main-nav .nav-cta {
                width: 100%;
                margin-top: 20px;
            }

            .main-nav .nav-cta .btn-cta {
                width: 100%;
            }

            .article-hero {
                padding: 40px 0 32px;
            }

            .article-title {
                font-size: 30px;
            }

            .article-content {
                padding: 28px 22px;
                font-size: 15px;
                border-radius: var(--radius);
            }

            .article-content h2 {
                font-size: 24px;
            }

            .article-content h3 {
                font-size: 19px;
            }

            .post-nav-wrap {
                flex-direction: column;
                align-items: stretch;
                gap: 16px;
                padding: 24px 0;
            }

            .post-nav-link {
                justify-content: flex-start;
            }

            .post-nav-link.next-post {
                justify-content: flex-start;
                text-align: left;
            }

            .post-nav-back {
                align-self: center;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .related-posts-section {
                padding: 56px 0;
            }

            .related-posts-section .section-header h2 {
                font-size: 26px;
            }

            .comment-section {
                padding: 56px 0;
            }

            .comment-wrap {
                padding: 28px 20px;
            }

            .float-cta {
                right: 16px;
                bottom: 16px;
            }

            .float-cta .btn-cta {
                height: 48px;
                padding: 0 20px;
                font-size: 14px;
            }
        }

        @media (max-width: 520px) {
            .container-custom {
                padding: 0 16px;
            }

            .brand-text {
                font-size: 18px;
            }

            .brand-icon {
                width: 34px;
                height: 34px;
            }

            .brand-icon svg {
                width: 20px;
                height: 20px;
            }

            .article-title {
                font-size: 26px;
            }

            .meta-tag {
                font-size: 12px;
                padding: 4px 12px;
            }

            .article-content {
                padding: 24px 18px;
            }

            .article-content p {
                line-height: 1.75;
            }

            .related-card-img {
                height: 140px;
            }

            .comment-wrap {
                padding: 24px 18px;
            }

            .float-cta .btn-cta span {
                display: none;
            }

            .float-cta .btn-cta {
                width: 48px;
                padding: 0;
                justify-content: center;
            }

            .footer-bottom {
                font-size: 12px;
                padding: 16px 8px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #1F5E7D;
            --primary-light: #E7F2F8;
            --primary-dark: #174A63;
            --bg: #FBFCFD;
            --card-bg: #FFFFFF;
            --text: #1C3543;
            --text-muted: #5B7586;
            --border: #D9E7EF;
            --accent: #F28C28;
            --accent-hover: #D4771F;
            --success: #2E9E6B;
            --danger: #C0392B;
            --radius-card: 14px;
            --radius-btn: 50px;
            --radius-input: 10px;
            --radius-tag: 6px;
            --radius-img: 16px;
            --shadow-card: 0 4px 16px rgba(31,94,125,0.08);
            --shadow-hover: 0 10px 30px rgba(31,94,125,0.15);
            --shadow-accent: 0 6px 16px rgba(242,140,40,0.25);
            --container-max: 1280px;
            --nav-height: 72px;
            --section-space: 88px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s;
        }

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

        img {
            max-width: 100%;
            height: auto;
        }

        .container-custom {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 30px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            border: 1.5px solid transparent;
            text-decoration: none;
            line-height: 1.4;
            transition: all .25s ease;
            cursor: pointer;
        }

        .btn:focus-visible {
            outline: 3px solid rgba(31,94,125,0.35);
            outline-offset: 2px;
        }

        .btn-cta {
            background: var(--accent);
            color: #FFFFFF;
        }

        .btn-cta:hover {
            background: var(--accent-hover);
            color: #FFFFFF;
            box-shadow: var(--shadow-accent);
            transform: translateY(-2px);
        }

        .btn-outline {
            border-color: var(--primary);
            color: var(--primary);
            background: transparent;
        }

        .btn-outline:hover {
            background: var(--primary);
            color: #FFFFFF;
            box-shadow: var(--shadow-card);
            transform: translateY(-2px);
        }

        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            color: var(--primary);
            text-decoration: none;
            transition: gap .25s;
        }

        .text-link:hover {
            gap: 12px;
            color: var(--accent-hover);
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: #FFFFFF;
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 4px rgba(31,94,125,0.03);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            flex-shrink: 0;
        }

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
        }

        .brand-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.2px;
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .main-nav .nav-link {
            position: relative;
            padding: 10px 2px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-muted);
            text-decoration: none;
            white-space: nowrap;
            transition: color .2s;
        }

        .main-nav .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: width .25s;
        }

        .main-nav .nav-link:hover {
            color: var(--primary);
        }

        .main-nav .nav-link:hover::after,
        .main-nav .nav-link.active::after {
            width: 100%;
        }

        .main-nav .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }

        .nav-cta .btn {
            padding: 10px 26px;
            font-size: 14px;
        }

        .navbar-toggler {
            display: none;
            width: 42px;
            height: 42px;
            border: none;
            border-radius: 10px;
            background: var(--primary-light);
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            padding: 0;
            cursor: pointer;
        }

        .navbar-toggler span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: transform .3s, opacity .3s;
        }

        .navbar-toggler.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .navbar-toggler.active span:nth-child(2) {
            opacity: 0;
        }

        .navbar-toggler.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ===== Page Banner ===== */
        .page-banner {
            position: relative;
            padding: 76px 0 72px;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid var(--border);
        }

        .page-banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(255, 255, 255, 0.94), rgba(255, 255, 255, 0.84) 55%, rgba(251, 252, 253, 0.76));
            z-index: 1;
        }

        .page-banner .container-custom {
            position: relative;
            z-index: 2;
        }

        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 22px;
        }

        .breadcrumb-nav a {
            color: var(--text-muted);
            text-decoration: none;
        }

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

        .breadcrumb-sep {
            font-size: 11px;
            color: var(--border);
        }

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

        .page-banner-title {
            font-size: 42px;
            line-height: 1.2;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }

        .page-banner-desc {
            max-width: 700px;
            font-size: 17px;
            line-height: 1.8;
            color: var(--text);
            margin-bottom: 24px;
        }

        .page-banner-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .badge-light {
            background: var(--primary-light);
            color: var(--primary);
            padding: 8px 16px;
            border-radius: var(--radius-tag);
            font-size: 13px;
            font-weight: 500;
        }

        .badge-light i {
            margin-right: 6px;
            color: var(--accent);
        }

        /* ===== Category Main ===== */
        .category-main {
            padding: var(--section-space) 0 56px;
        }

        .category-article {
            margin-bottom: 64px;
        }

        .category-article:last-child {
            margin-bottom: 0;
        }

        .category-article h2 {
            font-size: 28px;
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 18px;
        }

        .category-article p {
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .category-article .block-lead {
            font-size: 16px;
        }

        /* Feature block */
        .feature-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 44px;
            align-items: center;
            margin-bottom: 12px;
        }

        .feature-block.reverse .feature-media {
            order: 2;
        }

        .feature-media img {
            width: 100%;
            height: 320px;
            object-fit: cover;
            border-radius: var(--radius-img);
            box-shadow: var(--shadow-card);
        }

        .feature-body h2 {
            font-size: 26px;
        }

        .feature-body .icon-list {
            list-style: none;
            padding: 0;
            margin: 22px 0 0;
        }

        .feature-body .icon-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            color: var(--text);
            line-height: 1.7;
            margin-bottom: 14px;
        }

        .feature-body .icon-list li i {
            width: 22px;
            flex: 0 0 22px;
            margin-top: 3px;
            color: var(--accent);
            font-size: 15px;
        }

        .article-link-row {
            margin-top: 20px;
        }

        /* Sport cards */
        .sport-cards {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin-top: 28px;
        }

        .sport-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 24px;
            transition: transform .25s, box-shadow .25s, border-color .25s;
        }

        .sport-card:hover {
            border-color: rgba(31, 94, 125, 0.3);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .sport-card .sport-icon {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            margin-bottom: 16px;
        }

        .sport-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
        }

        .sport-card .sport-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 14px;
        }

        .sport-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

        .sport-tags .tag {
            background: #F3F8FB;
            color: var(--primary);
            padding: 4px 10px;
            border-radius: var(--radius-tag);
            font-size: 12px;
            font-weight: 500;
        }

        /* Steps flow */
        .steps-flow {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 28px;
        }

        .step-item {
            position: relative;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 30px 24px 26px;
            text-align: center;
            transition: transform .25s, box-shadow .25s;
        }

        .step-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .step-item:not(:last-child)::after {
            content: "\f054";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            font-size: 15px;
            position: absolute;
            right: -20px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--accent);
            background: var(--bg);
            border-radius: 50%;
            z-index: 2;
        }

        .step-number {
            width: 48px;
            height: 48px;
            margin: 0 auto 18px;
            background: var(--primary);
            color: #FFFFFF;
            font-size: 20px;
            font-weight: 700;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 6px 14px rgba(31, 94, 125, 0.18);
        }

        .step-item h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 10px;
        }

        .step-item p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* Feature grid */
        .feature-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-top: 28px;
        }

        .feature-item {
            display: flex;
            gap: 16px;
            padding: 24px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            transition: border-color .25s, box-shadow .25s;
        }

        .feature-item:hover {
            border-color: rgba(31, 94, 125, 0.3);
            box-shadow: var(--shadow-card);
        }

        .feature-item i {
            width: 42px;
            height: 42px;
            flex: 0 0 42px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 16px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .feature-item h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 6px;
        }

        .feature-item p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 0;
        }

        /* Sidebar */
        .sidebar {
            position: sticky;
            top: calc(var(--nav-height) + 24px);
        }

        .sidebar-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 24px;
            margin-bottom: 24px;
            box-shadow: 0 2px 8px rgba(31, 94, 125, 0.04);
        }

        .sidebar-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border);
        }

        .sidebar-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .sidebar-links li+li {
            border-top: 1px solid #EFF4F8;
        }

        .sidebar-links a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 0;
            color: var(--text);
            font-size: 14px;
            text-decoration: none;
            transition: color .2s, padding-left .2s;
        }

        .sidebar-links a i {
            width: 16px;
            color: var(--primary);
            font-size: 13px;
            flex-shrink: 0;
        }

        .sidebar-links a:hover {
            color: var(--accent-hover);
            padding-left: 6px;
        }

        .sidebar-links .article-date {
            margin-left: auto;
            font-size: 12px;
            color: var(--text-muted);
            flex-shrink: 0;
        }

        .sidebar-cta {
            background: var(--primary-light);
            border-color: transparent;
            text-align: center;
        }

        .sidebar-cta h3 {
            border-bottom: none;
            margin-bottom: 8px;
        }

        .sidebar-cta p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 18px;
        }

        .sidebar-cta .btn {
            font-size: 14px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: var(--section-space) 0;
            background: var(--primary-light);
        }

        .faq-header {
            text-align: center;
            margin-bottom: 44px;
        }

        .faq-header h2 {
            font-size: 30px;
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
        }

        .faq-header p {
            color: var(--text-muted);
            font-size: 15px;
        }

        .faq-wrap {
            max-width: 920px;
            margin: 0 auto;
        }

        .faq-wrap .accordion-item {
            background: #FFFFFF;
            border: 1px solid var(--border);
            border-radius: var(--radius-card) !important;
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(31, 94, 125, 0.04);
        }

        .faq-wrap .accordion-button {
            background: #FFFFFF;
            color: var(--primary);
            font-size: 17px;
            line-height: 1.5;
            font-weight: 600;
            padding: 18px 24px;
            box-shadow: none;
            border-radius: var(--radius-card) !important;
        }

        .faq-wrap .accordion-button:not(.collapsed) {
            background: #FFFFFF;
            color: var(--primary);
            box-shadow: inset 3px 0 0 var(--accent);
        }

        .faq-wrap .accordion-button:focus {
            box-shadow: none;
        }

        .faq-wrap .accordion-button::after {
            background-image: none;
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            color: var(--primary);
            font-size: 14px;
            transform: rotate(-90deg);
            transition: transform .3s;
        }

        .faq-wrap .accordion-button:not(.collapsed)::after {
            transform: rotate(0);
        }

        .faq-wrap .accordion-body {
            padding: 0 26px 22px 27px;
            color: var(--text-muted);
            line-height: 1.8;
            font-size: 15px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: var(--section-space) 0;
            background: var(--bg);
        }

        .cta-box {
            background: #FFFFFF;
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 52px 40px;
            text-align: center;
            box-shadow: var(--shadow-card);
        }

        .cta-box h2 {
            font-size: 28px;
            line-height: 1.35;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
        }

        .cta-box p {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 580px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #113946;
            color: rgba(255, 255, 255, 0.72);
            padding-top: 64px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 56px;
            padding-bottom: 48px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .footer-brand-text {
            color: #FFFFFF;
            font-size: 22px;
            font-weight: 700;
        }

        .footer-desc {
            color: rgba(255, 255, 255, 0.58);
            line-height: 1.8;
            margin-top: 16px;
            max-width: 360px;
            font-size: 14px;
        }

        .footer-title {
            color: #FFFFFF;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .footer-links,
        .footer-contact {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li+li,
        .footer-contact li+li {
            margin-top: 12px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.62);
            text-decoration: none;
            font-size: 14px;
            transition: color .2s;
        }

        .footer-links a:hover {
            color: var(--accent);
        }

        .footer-contact li {
            color: rgba(255, 255, 255, 0.62);
            font-size: 14px;
        }

        .footer-contact i {
            width: 20px;
            color: var(--accent);
            margin-right: 6px;
            font-size: 14px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.14);
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-bottom .heart {
            color: var(--accent);
            margin-left: 4px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1199.98px) {
            .main-nav {
                gap: 22px;
            }
        }

        @media (max-width: 991.98px) {
            .main-nav {
                gap: 16px;
            }

            .main-nav .nav-link {
                font-size: 15px;
            }

            .nav-cta .btn {
                padding: 9px 20px;
                font-size: 13px;
            }

            .feature-block {
                gap: 28px;
            }

            .feature-media img {
                height: 280px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
        }

        @media (max-width: 767.98px) {
            :root {
                --section-space: 52px;
            }

            .site-header {
                position: sticky;
            }

            .navbar-toggler {
                display: flex;
            }

            .main-nav {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                background: #FFFFFF;
                padding: 18px 24px 24px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 20px 40px rgba(31, 94, 125, 0.12);
                z-index: 1050;
            }

            .main-nav.open {
                display: flex;
            }

            .main-nav .nav-link {
                padding: 14px 0;
                font-size: 16px;
                width: 100%;
                border-bottom: 1px solid #F0F5F8;
            }

            .main-nav .nav-link::after {
                display: none;
            }

            .nav-cta {
                width: 100%;
                margin-top: 16px;
            }

            .nav-cta .btn {
                width: 100%;
                padding: 12px 20px;
            }

            .page-banner {
                padding: 48px 0;
            }

            .page-banner-title {
                font-size: 30px;
            }

            .page-banner-desc {
                font-size: 15px;
            }

            .category-main {
                padding-top: 48px;
            }

            .feature-block {
                grid-template-columns: 1fr;
            }

            .feature-block.reverse .feature-media {
                order: 0;
            }

            .feature-media img {
                height: 230px;
            }

            .sport-cards,
            .feature-grid {
                grid-template-columns: 1fr;
            }

            .steps-flow {
                grid-template-columns: 1fr;
            }

            .step-item:not(:last-child)::after {
                display: none;
            }

            .sidebar {
                position: static;
                margin-top: 12px;
            }

            .faq-header h2,
            .cta-box h2 {
                font-size: 24px;
            }

            .cta-box {
                padding: 36px 20px;
            }

            .cta-actions {
                flex-direction: column;
            }

            .cta-actions .btn {
                width: 100%;
            }

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

        @media (max-width: 520px) {
            .container-custom {
                padding-left: 18px;
                padding-right: 18px;
            }

            .brand-text {
                font-size: 18px;
            }

            .page-banner-title {
                font-size: 26px;
            }

            .page-banner-badges .badge-light {
                padding: 6px 12px;
                font-size: 12px;
            }

            .category-article h2 {
                font-size: 22px;
            }

            .feature-body h2 {
                font-size: 22px;
            }

            .step-item {
                padding: 24px 18px;
            }

            .sport-card,
            .feature-item {
                padding: 20px 16px;
            }

            .sidebar-card {
                padding: 20px 16px;
            }
        }

/* roulang page: category2 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1F5E7D;
            --primary-light: #E7F2F8;
            --primary-grad: #F2F8FB;
            --bg: #FBFCFD;
            --white: #FFFFFF;
            --text: #1C3543;
            --text-secondary: #5B7586;
            --border: #D9E7EF;
            --accent: #F28C28;
            --accent-hover: #D4771F;
            --success: #2E9E6B;
            --footer-bg: #113946;
            --radius-card: 14px;
            --radius-btn: 50px;
            --radius-input: 10px;
            --radius-tag: 6px;
            --radius-img: 16px;
            --shadow-card: 0 4px 16px rgba(31, 94, 125, 0.08);
            --shadow-card-hover: 0 10px 30px rgba(31, 94, 125, 0.15);
            --shadow-btn: 0 6px 16px rgba(242, 140, 40, 0.25);
            --container-max: 1280px;
            --spacer-section: 88px;
            --spacer-section-mobile: 48px;
            --font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background: var(--bg);
            color: var(--text);
            font-size: 16px;
            line-height: 1.8;
            margin: 0;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.25s ease;
        }

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

        img {
            max-width: 100%;
            height: auto;
            object-fit: cover;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            margin: 0 0 16px;
        }

        p {
            margin: 0 0 16px;
        }

        ul {
            padding: 0;
            margin: 0;
            list-style: none;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
        }

        /* ===== Layout ===== */
        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section-padding {
            padding-top: var(--spacer-section);
            padding-bottom: var(--spacer-section);
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            background: var(--white);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1030;
            box-shadow: 0 2px 12px rgba(31, 94, 125, 0.04);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-icon {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .brand-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-link {
            font-size: 16px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 2px;
            position: relative;
            transition: color 0.25s ease;
            white-space: nowrap;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transform: scaleX(0);
            transform-origin: left center;
            transition: transform 0.3s ease;
        }

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

        .nav-link:hover::after,
        .nav-link.active::after {
            transform: scaleX(1);
        }

        .nav-link.active {
            color: var(--primary);
        }

        .nav-cta {
            margin-left: 16px;
        }

        .nav-cta .btn-cta {
            padding: 10px 24px;
            font-size: 14px;
        }

        .navbar-toggler {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            padding: 8px;
            cursor: pointer;
        }

        .navbar-toggler span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }

        /* ===== Buttons ===== */
        .btn {
            border-radius: var(--radius-btn);
            padding: 12px 32px;
            font-weight: 600;
            font-size: 16px;
            line-height: 1.4;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .btn-cta {
            background: var(--accent);
            color: var(--white) !important;
            box-shadow: var(--shadow-btn);
        }

        .btn-cta:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(242, 140, 40, 0.3);
            color: var(--white) !important;
        }

        .btn-outline {
            background: transparent;
            color: var(--primary) !important;
            border: 1.5px solid var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== Page Hero ===== */
        .category-hero {
            background: linear-gradient(135deg, var(--primary-grad) 0%, var(--primary-light) 100%);
            padding: 72px 0 56px;
            position: relative;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.08;
        }

        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 28px;
            position: relative;
            z-index: 1;
        }

        .breadcrumb-nav a {
            color: var(--text-secondary);
            transition: color 0.2s ease;
        }

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

        .breadcrumb-nav .sep {
            color: var(--border);
        }

        .category-hero h1 {
            font-size: 42px;
            font-weight: 800;
            margin-bottom: 16px;
            line-height: 1.2;
            color: var(--text);
            position: relative;
            z-index: 1;
        }

        .category-hero .lead-text {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.8;
            margin-bottom: 0;
            position: relative;
            z-index: 1;
        }

        /* ===== Category Layout ===== */
        .category-layout {
            padding-top: 64px;
            padding-bottom: 72px;
        }

        .col-main {
            padding-right: 20px;
        }

        .col-side {
            padding-left: 20px;
        }

        /* ===== Content Blocks ===== */
        .content-block {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 32px;
            box-shadow: var(--shadow-card);
            margin-bottom: 32px;
            transition: box-shadow 0.3s ease;
        }

        .content-block:hover {
            box-shadow: var(--shadow-card-hover);
        }

        .content-block .block-image {
            border-radius: var(--radius-img);
            overflow: hidden;
            margin-bottom: 28px;
        }

        .content-block .block-image img {
            width: 100%;
            max-height: 360px;
            object-fit: cover;
            display: block;
        }

        .content-block h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 14px;
            position: relative;
            padding-left: 18px;
        }

        .content-block h2::before {
            content: '';
            position: absolute;
            left: 0;
            top: 6px;
            width: 4px;
            height: 22px;
            background: var(--accent);
            border-radius: 2px;
        }

        .content-block p {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-secondary);
            margin-bottom: 14px;
        }

        .content-block p:last-child {
            margin-bottom: 0;
        }

        /* ===== Data Grid ===== */
        .data-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-top: 24px;
        }

        .data-item {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 24px 20px;
            display: flex;
            gap: 14px;
            align-items: flex-start;
            transition: all 0.3s ease;
        }

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

        .data-icon {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 18px;
            flex-shrink: 0;
        }

        .data-item h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .data-item p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        /* ===== Scene List ===== */
        .scene-list {
            margin-top: 28px;
        }

        .scene-item {
            display: flex;
            gap: 20px;
            padding: 24px 0;
            border-bottom: 1px solid var(--border);
            transition: background 0.3s ease;
        }

        .scene-item:first-child {
            padding-top: 0;
        }

        .scene-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .scene-num {
            font-size: 28px;
            font-weight: 800;
            color: var(--primary-light);
            line-height: 1;
            flex-shrink: 0;
            min-width: 48px;
            transition: color 0.3s ease;
        }

        .scene-item:hover .scene-num {
            color: var(--accent);
        }

        .scene-item h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .scene-item p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== Sidebar ===== */
        .side-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 24px;
            box-shadow: var(--shadow-card);
            margin-bottom: 24px;
            transition: box-shadow 0.3s ease;
        }

        .side-card:hover {
            box-shadow: var(--shadow-card-hover);
        }

        .side-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 18px;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .side-title i {
            color: var(--accent);
        }

        .side-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
            transition: padding-left 0.3s ease;
        }

        .side-list li:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .side-list li:first-child {
            padding-top: 0;
        }

        .side-list a {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            color: var(--text);
            font-weight: 500;
            line-height: 1.6;
        }

        .side-list a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .side-list .tag {
            font-size: 11px;
            background: var(--primary-light);
            color: var(--primary);
            padding: 2px 8px;
            border-radius: var(--radius-tag);
            white-space: nowrap;
            font-weight: 600;
        }

        .entry-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .entry-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 10px;
            font-size: 15px;
            font-weight: 500;
            color: var(--primary);
            transition: all 0.3s ease;
        }

        .entry-link i {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--primary);
            flex-shrink: 0;
        }

        .entry-link:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            transform: translateX(4px);
            color: var(--primary);
        }

        .side-cta {
            background: var(--primary);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            text-align: center;
            color: var(--white);
            margin-bottom: 24px;
            position: relative;
            overflow: hidden;
        }

        .side-cta::after {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 100px;
            height: 100px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
        }

        .side-cta h3 {
            color: var(--white);
            font-size: 20px;
            margin-bottom: 10px;
        }

        .side-cta p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .side-cta .btn-cta {
            background: var(--accent);
            color: var(--white) !important;
            font-size: 14px;
            padding: 10px 24px;
        }

        .side-cta .btn-cta:hover {
            background: var(--accent-hover);
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            background: var(--primary-light);
            padding-top: var(--spacer-section);
            padding-bottom: var(--spacer-section);
        }

        .faq-section .section-title {
            font-size: 32px;
            text-align: center;
            margin-bottom: 40px;
        }

        .faq-wrap {
            max-width: 920px;
            margin: 0 auto;
        }

        .accordion-item {
            background: var(--white);
            border: 1px solid var(--border) !important;
            border-radius: var(--radius-card) !important;
            margin-bottom: 12px;
            box-shadow: var(--shadow-card);
            overflow: hidden;
        }

        .accordion-item:last-child {
            margin-bottom: 0;
        }

        .accordion-button {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary);
            padding: 20px 24px;
            background: var(--white);
            border: none;
            box-shadow: none !important;
            position: relative;
            transition: all 0.3s ease;
        }

        .accordion-button::after {
            background: none;
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: var(--primary);
            transition: transform 0.3s ease;
            font-size: 16px;
        }

        .accordion-button:not(.collapsed) {
            background: var(--white);
            color: var(--primary);
            box-shadow: none;
        }

        .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
        }

        .accordion-button:focus {
            outline: none;
            box-shadow: none;
        }

        .accordion-button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: -2px;
            border-radius: var(--radius-card);
        }

        .accordion-item:has(.accordion-button:not(.collapsed)) {
            border-left: 3px solid var(--accent) !important;
        }

        .accordion-body {
            padding: 0 24px 24px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* ===== Bottom CTA ===== */
        .bottom-cta {
            padding-top: var(--spacer-section);
            padding-bottom: var(--spacer-section);
        }

        .cta-box {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 56px 40px;
            text-align: center;
            box-shadow: var(--shadow-card);
            position: relative;
            background: linear-gradient(135deg, var(--primary-grad) 0%, var(--primary-light) 100%);
        }

        .cta-box h2 {
            font-size: 32px;
            margin-bottom: 16px;
        }

        .cta-box p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 520px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--footer-bg);
            color: rgba(255, 255, 255, 0.86);
            padding: 64px 0 0;
            font-size: 15px;
            line-height: 1.8;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 48px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-brand-text {
            font-size: 22px;
            font-weight: 700;
            color: var(--white);
        }

        .footer-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.8;
            max-width: 320px;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--white);
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 28px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .footer-links li,
        .footer-contact li {
            margin-bottom: 8px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            transition: all 0.3s ease;
        }

        .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
        }

        .footer-contact i {
            color: var(--accent);
            width: 16px;
            font-size: 14px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-bottom .heart {
            color: var(--accent);
            margin: 0 2px;
            font-size: 12px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .main-nav {
                gap: 20px;
            }

            .nav-link {
                font-size: 15px;
            }

            .col-main {
                padding-right: 12px;
            }

            .col-side {
                padding-left: 12px;
            }
        }

        @media (max-width: 768px) {
            .container-custom {
                padding: 0 16px;
            }

            .section-padding {
                padding-top: var(--spacer-section-mobile);
                padding-bottom: var(--spacer-section-mobile);
            }

            .header-inner {
                height: 60px;
            }

            .main-nav {
                position: fixed;
                top: 60px;
                left: 0;
                right: 0;
                background: var(--white);
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                padding: 16px 24px 24px;
                box-shadow: 0 8px 24px rgba(31, 94, 125, 0.12);
                transform: translateY(-120%);
                opacity: 0;
                transition: transform 0.35s ease, opacity 0.3s ease;
                border-bottom: 1px solid var(--border);
                z-index: 1020;
            }

            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
            }

            .main-nav .nav-link {
                width: 100%;
                padding: 14px 0;
                font-size: 16px;
                border-bottom: 1px solid var(--border);
                line-height: 1.2;
            }

            .main-nav .nav-link:last-of-type {
                border-bottom: none;
            }

            .main-nav .nav-link::after {
                display: none;
            }

            .main-nav .nav-cta {
                width: 100%;
                margin: 16px 0 0;
            }

            .main-nav .nav-cta .btn-cta {
                width: 100%;
            }

            .navbar-toggler {
                display: flex;
            }

            .navbar-toggler.active span:nth-child(1) {
                transform: rotate(45deg) translate(5px, 5px);
            }

            .navbar-toggler.active span:nth-child(2) {
                opacity: 0;
            }

            .navbar-toggler.active span:nth-child(3) {
                transform: rotate(-45deg) translate(5px, -5px);
            }

            .category-hero {
                padding: 48px 0 40px;
            }

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

            .category-hero .lead-text {
                font-size: 15px;
            }

            .category-layout {
                padding-top: 40px;
                padding-bottom: 48px;
            }

            .col-main,
            .col-side {
                padding: 0;
            }

            .col-side {
                margin-top: 32px;
            }

            .content-block {
                padding: 20px;
            }

            .content-block h2 {
                font-size: 22px;
            }

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

            .scene-item {
                gap: 14px;
            }

            .scene-num {
                font-size: 22px;
                min-width: 36px;
            }

            .faq-section .section-title {
                font-size: 24px;
            }

            .accordion-button {
                font-size: 16px;
                padding: 16px 18px;
            }

            .accordion-body {
                padding: 0 18px 18px;
                font-size: 14px;
            }

            .cta-box {
                padding: 36px 20px;
            }

            .cta-box h2 {
                font-size: 24px;
            }

            .cta-box p {
                font-size: 15px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                padding-bottom: 24px;
            }

            .footer-desc {
                max-width: 100%;
            }

            .site-footer {
                padding-top: 48px;
            }
        }

        @media (max-width: 520px) {
            .brand-text {
                font-size: 18px;
            }

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

            .content-block h2 {
                font-size: 20px;
            }

            .data-item {
                padding: 18px 16px;
            }

            .btn {
                padding: 10px 22px;
                font-size: 15px;
            }

            .cta-box {
                padding: 28px 16px;
            }

            .cta-box h2 {
                font-size: 20px;
            }
        }