/* roulang page: index */
:root {
            --primary: #1B7FBF;
            --primary-dark: #14689E;
            --primary-light: #EAF2F9;
            --accent: #34A67C;
            --accent-light: #E8F5EF;
            --highlight: #EFA23E;
            --highlight-light: #FDF3E4;
            --bg: #F5F8FB;
            --card-bg: #FFFFFF;
            --text-main: #16233A;
            --text-secondary: #5B6B80;
            --text-muted: #8A98A8;
            --border: #E5EBF0;
            --divider: #EDF1F5;
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-chip: 999px;
            --shadow-card: 0 12px 32px rgba(22, 35, 58, 0.07);
            --shadow-hover: 0 20px 48px rgba(22, 35, 58, 0.12);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
        }

        button,
        input {
            font-family: inherit;
            font-size: inherit;
        }

        .container {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.96);
            border-bottom: 1px solid var(--divider);
            backdrop-filter: blur(6px);
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }

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

        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }

        .brand-icon::before {
            content: '';
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #fff;
            position: absolute;
            top: 8px;
            left: 8px;
            box-shadow: 0 4px 0 rgba(255, 255, 255, 0.5);
        }

        .brand-icon::after {
            content: '';
            width: 16px;
            height: 2px;
            background: var(--highlight);
            position: absolute;
            bottom: 8px;
            right: 6px;
            border-radius: 2px;
        }

        .brand-text {
            font-size: 18px;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .brand-text span{
            color: var(--primary);
        }

        .nav-chip-wrap {
            display: flex;
            align-items: center;
            gap: 4px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-chip);
            padding: 4px 6px;
            overflow-x: auto;
            scrollbar-width: none;
            flex: 1;
            justify-content: center;
        }

        .nav-chip-wrap::-webkit-scrollbar {
            display: none;
        }

        .nav-chip {
            display: inline-block;
            padding: 8px 20px;
            border-radius: var(--radius-chip);
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            white-space: nowrap;
            transition: all 0.25s ease;
        }

        .nav-chip:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

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

        .nav-chip:active {
            transform: scale(0.98);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-btn);
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all 0.25s ease;
            flex-shrink: 0;
        }

        .nav-cta:hover {
            background: var(--primary-dark);
            box-shadow: 0 8px 20px rgba(27, 127, 191, 0.3);
            transform: translateY(-1px);
        }

        .nav-cta:active {
            transform: translateY(0) scale(0.98);
        }

        /* Hero */
        .hero-section {
            position: relative;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            padding: 100px 0 90px;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.82) 50%, rgba(255, 255, 255, 0.55) 100%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 760px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(27, 127, 191, 0.1);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: var(--radius-chip);
            margin-bottom: 20px;
            border: 1px solid rgba(27, 127, 191, 0.15);
        }

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

        .hero-title {
            font-size: clamp(40px, 6vw, 60px);
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-main);
            letter-spacing: -0.5px;
        }

        .hero-title .dot {
            color: var(--primary);
        }

        .hero-subtitle {
            font-size: 18px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 22px 0 32px;
            max-width: 640px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 32px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: var(--radius-btn);
            padding: 14px 32px;
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all 0.25s ease;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(27, 127, 191, 0.28);
        }
        .btn-primary:active {
            transform: translateY(0) scale(0.98);
        }

        .btn-outline {
            background: #fff;
            color: var(--primary);
            border: 1.5px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary-light);
            border-color: var(--primary-dark);
        }
        .btn-outline:active {
            transform: scale(0.98);
        }

        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.6);
        }

        .hero-meta span {
            font-size: 13px;
            color: var(--text-secondary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .hero-meta i {
            color: var(--highlight);
        }

        /* Section */
        .section {
            padding: 96px 0;
        }

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

        .section-header {
            max-width: 720px;
            margin-bottom: 48px;
        }

        .section-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 16px;
            border-radius: var(--radius-chip);
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }

        .section-title {
            font-size: clamp(28px, 4vw, 38px);
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-main);
            margin-bottom: 14px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }

        /* Story */
        .story-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
        }

        .story-image {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            position: relative;
        }

        .story-image img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }

        .story-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(22, 35, 58, 0.12) 0%, transparent 50%);
            border-radius: var(--radius-card);
        }

        .story-badge {
            position: absolute;
            bottom: 20px;
            left: 20px;
            background: rgba(255, 255, 255, 0.95);
            border-radius: var(--radius-btn);
            padding: 8px 16px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            z-index: 2;
            box-shadow: var(--shadow-card);
        }

        .story-content {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .story-title {
            font-size: clamp(26px, 3vw, 34px);
            font-weight: 700;
            line-height: 1.4;
            color: var(--text-main);
        }

        .story-text {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .story-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
            margin-top: 4px;
        }
        .story-link:hover {
            gap: 12px;
            color: var(--primary-dark);
        }
        .story-link i {
            transition: transform 0.25s ease;
        }
        .story-link:hover i {
            transform: translateX(4px);
        }

        /* Feature timeline */
        .timeline-wrap {
            display: flex;
            flex-direction: column;
            gap: 0;
            max-width: 860px;
            margin: 0 auto;
        }

        .timeline-item {
            display: grid;
            grid-template-columns: 140px 1fr;
            gap: 32px;
            padding: 32px 0;
            border-bottom: 1px solid var(--divider);
            position: relative;
        }

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

        .timeline-num {
            font-size: 40px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
            letter-spacing: -1px;
            opacity: 0.35;
            position: relative;
            top: 4px;
        }

        .timeline-tag {
            display: inline-block;
            background: var(--highlight-light);
            color: #B4791F;
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: var(--radius-chip);
            margin-bottom: 10px;
        }

        .timeline-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
            line-height: 1.45;
        }

        .timeline-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 560px;
        }

        .timeline-link {
            display: inline-block;
            margin-top: 12px;
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
        }
        .timeline-link:hover {
            color: var(--primary-dark);
            text-decoration: underline;
            text-underline-offset: 4px;
        }

        /* Trust stats */
        .trust-section {
            background: var(--primary-light);
            padding: 80px 0;
            border-top: 1px solid rgba(27, 127, 191, 0.1);
            border-bottom: 1px solid rgba(27, 127, 191, 0.1);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
            margin-bottom: 56px;
        }

        .stat-number {
            font-size: 46px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }

        .stat-label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 8px;
        }

        .badge-row {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 24px;
        }

        .cert-badge {
            display: flex;
            align-items: center;
            gap: 10px;
            background: var(--card-bg);
            border-radius: var(--radius-btn);
            padding: 10px 20px;
            box-shadow: 0 4px 14px rgba(22, 35, 58, 0.06);
            border: 1px solid var(--border);
        }

        .cert-icon {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 14px;
        }

        .cert-name {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-main);
        }

        /* News list */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .news-card {
            display: flex;
            align-items: flex-start;
            background: var(--card-bg);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            padding: 24px 28px;
            box-shadow: 0 4px 16px rgba(22, 35, 58, 0.04);
            transition: all 0.3s ease;
            gap: 24px;
        }

        .news-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(27, 127, 191, 0.2);
        }

        .news-date {
            min-width: 64px;
            text-align: center;
            padding-top: 2px;
        }

        .news-date .day {
            font-size: 24px;
            font-weight: 800;
            color: var(--highlight);
            line-height: 1.2;
        }

        .news-date .month {
            font-size: 12px;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .news-info {
            flex: 1;
        }

        .news-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 6px;
            line-height: 1.45;
            transition: color 0.25s ease;
        }
        .news-card:hover .news-title {
            color: var(--primary);
        }

        .news-summary {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 10px;
            flex-wrap: wrap;
        }

        .news-tag {
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: var(--radius-chip);
        }

        .news-link-arrow {
            color: var(--text-muted);
            font-size: 13px;
            transition: all 0.25s ease;
        }
        .news-card:hover .news-link-arrow {
            color: var(--primary);
        }

        .empty-state {
            text-align: center;
            padding: 60px 20px;
            background: var(--card-bg);
            border-radius: var(--radius-card);
            border: 1px dashed var(--border);
        }
        .empty-state i {
            font-size: 40px;
            color: #C0CCD9;
            margin-bottom: 16px;
        }
        .empty-state p {
            font-size: 15px;
            color: var(--text-muted);
        }

        /* CTA */
        .cta-section {
            background: var(--primary);
            border-radius: 24px;
            padding: 64px;
            margin: 96px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: 30%;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
        }

        .cta-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 2;
        }

        .cta-title {
            font-size: clamp(26px, 3.5vw, 36px);
            font-weight: 800;
            color: #fff;
            line-height: 1.35;
            margin-bottom: 14px;
        }

        .cta-desc {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.7;
        }

        .cta-form {
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            border-radius: var(--radius-card);
            padding: 28px;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }

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

        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 6px;
        }

        .form-input {
            width: 100%;
            background: #fff;
            border: 1px solid rgba(255, 255, 255, 0.5);
            border-radius: var(--radius-btn);
            padding: 12px 16px;
            font-size: 14px;
            color: var(--text-main);
            outline: none;
            transition: all 0.25s ease;
        }

        .form-input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(27, 127, 191, 0.15);
        }

        .form-btn {
            width: 100%;
            background: var(--highlight);
            color: var(--text-main);
            border: none;
            border-radius: var(--radius-btn);
            padding: 14px;
            font-size: 15px;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.25s ease;
            margin-top: 4px;
        }
        .form-btn:hover {
            background: #F0A94E;
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(0, 0, 0, 0.15);
        }
        .form-btn:active {
            transform: scale(0.98);
        }

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

        .faq-item {
            background: var(--card-bg);
            border-radius: 12px;
            border: 1px solid var(--border);
            margin-bottom: 12px;
            overflow: hidden;
            transition: box-shadow 0.25s ease;
        }
        .faq-item:hover {
            box-shadow: var(--shadow-card);
        }

        .faq-item.active {
            border-color: rgba(27, 127, 191, 0.3);
        }

        .faq-question {
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            user-select: none;
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }

        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            padding: 0 24px 20px;
            max-height: 300px;
        }

        /* Footer */
        .site-footer {
            background: #101D2C;
            color: #A7B4C2;
            padding: 72px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
        }

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

        .footer-brand .brand-text span {
            color: #4FA3D9;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.75;
            color: #8A9BAE;
            max-width: 300px;
        }

        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }

        .footer-link-list {
            list-style: none;
        }

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

        .footer-link-list a {
            font-size: 14px;
            color: #8A9BAE;
        }
        .footer-link-list a:hover {
            color: #4FA3D9;
        }

        .footer-contact-list {
            list-style: none;
        }

        .footer-contact-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 14px;
            font-size: 14px;
            color: #8A9BAE;
        }

        .footer-contact-list i {
            color: var(--primary);
            margin-top: 4px;
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: #6B7C90;
        }

        /* ========= 响应式 ========= */
        @media (max-width: 1024px) {
            .story-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .story-image img {
                height: 320px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
            .cta-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 64px 0;
            }
            .hero-section {
                padding: 72px 0 64px;
            }
            .nav-wrap {
                height: 64px;
                gap: 12px;
            }
            .brand-text {
                font-size: 16px;
            }
            .brand-icon {
                width: 32px;
                height: 32px;
            }
            .nav-chip-wrap {
                order: 3;
                width: 100%;
                justify-content: flex-start;
                margin-top: 8px;
                border-radius: 12px;
                overflow-x: auto;
            }
            .nav-wrap {
                flex-wrap: wrap;
                height: auto;
                padding: 12px 0;
            }
            .nav-wrap .nav-cta {
                margin-left: auto;
                padding: 8px 16px;
                font-size: 13px;
            }
            .timeline-item {
                grid-template-columns: 80px 1fr;
                gap: 16px;
            }
            .timeline-num {
                font-size: 32px;
            }
            .news-card {
                flex-direction: column;
                gap: 12px;
                padding: 20px;
            }
            .news-date {
                display: flex;
                align-items: center;
                gap: 8px;
                min-width: 0;
            }
            .cta-section {
                padding: 40px 24px;
                margin: 64px 0;
                border-radius: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                padding: 16px 0;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 36px;
            }
            .hero-subtitle {
                font-size: 16px;
            }
            .hero-actions {
                flex-direction: column;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .stats-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .badge-row {
                gap: 12px;
            }
            .cert-badge {
                padding: 8px 14px;
            }
            .timeline-item {
                grid-template-columns: 1fr;
                gap: 8px;
                padding: 24px 0;
            }
            .timeline-num {
                font-size: 26px;
            }
            .form-btn {
                padding: 12px;
            }
            .nav-cta {
                display: none;
            }
            .nav-chip {
                padding: 6px 14px;
                font-size: 13px;
            }
            .brand-text {
                font-size: 15px;
            }
            .footer-grid {
                gap: 24px;
            }
            .cta-section {
                padding: 32px 20px;
            }
        }

        /* Focus visible */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(27, 127, 191, 0.4);
            outline-offset: 2px;
        }

        .text-gradient {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

/* roulang page: category1 */
:root {
            --primary: #1B7FBF;
            --primary-dark: #14689E;
            --primary-light: #EAF2F9;
            --accent: #34A67C;
            --highlight: #EFA23E;
            --bg: #F5F8FB;
            --card: #FFFFFF;
            --text-main: #16233A;
            --text-secondary: #5B6B80;
            --text-muted: #8A98A8;
            --border: #E5EBF0;
            --divider: #EDF1F5;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 12px 32px rgba(22, 35, 58, 0.07);
            --shadow-hover: 0 20px 48px rgba(22, 35, 58, 0.12);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
            background: var(--bg);
            color: var(--text-main);
            font-size: 16px;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s ease;
        }

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: #FFFFFF;
            border-bottom: 1px solid var(--border);
            box-shadow: 0 4px 20px rgba(22, 35, 58, 0.04);
        }

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

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

        .brand-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, #1B7FBF 55%, #34A67C);
            box-shadow: 0 6px 16px rgba(27, 127, 191, 0.22);
            position: relative;
        }

        .brand-icon::before {
            content: "";
            position: absolute;
            inset: 9px;
            border-radius: 6px;
            background: rgba(255, 255, 255, 0.9);
        }

        .brand-icon::after {
            content: "";
            position: absolute;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--highlight);
            top: 5px;
            right: 6px;
        }

        .brand-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: .5px;
        }

        .brand-text span {
            color: var(--primary);
        }

        .nav-chip-wrap {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 4px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 999px;
            overflow-x: auto;
            scrollbar-width: none;
            flex: 1;
            justify-content: center;
        }

        .nav-chip-wrap::-webkit-scrollbar {
            display: none;
        }

        .nav-chip {
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            background: #FFFFFF;
            border: 1px solid var(--border);
            white-space: nowrap;
            transition: all .25s ease;
        }

        .nav-chip:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: rgba(27, 127, 191, 0.35);
        }

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

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: 10px;
            background: var(--primary);
            color: #FFFFFF;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            box-shadow: 0 8px 20px rgba(27, 127, 191, 0.22);
            transition: all .25s ease;
            flex-shrink: 0;
        }

        .nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }

        /* ===== Hero ===== */
        .cat-hero {
            position: relative;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            padding: 92px 0 84px;
        }

        .cat-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(255, 255, 255, 0.72));
        }

        .cat-hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 18px;
            border-radius: 999px;
            background: rgba(27, 127, 191, 0.1);
            border: 1px solid rgba(27, 127, 191, 0.25);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .hero-title {
            font-size: clamp(40px, 6vw, 60px);
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-main);
            letter-spacing: -.5px;
            margin: 0 0 20px;
        }

        .hero-title .dot {
            color: var(--primary);
        }

        .hero-subtitle {
            font-size: 17px;
            line-height: 1.7;
            color: var(--text-secondary);
            max-width: 720px;
            margin: 0 auto 32px;
        }

        /* ===== Buttons ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 10px;
            background: var(--primary);
            color: #FFFFFF;
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            box-shadow: 0 10px 24px rgba(27, 127, 191, 0.25);
            transition: all .25s ease;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 14px 30px rgba(27, 127, 191, 0.3);
        }

        .btn-primary:active {
            transform: translateY(0) scale(0.98);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 10px;
            background: #FFFFFF;
            color: var(--primary);
            font-size: 15px;
            font-weight: 600;
            border: 1.5px solid var(--primary);
            cursor: pointer;
            transition: all .25s ease;
        }

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

        .btn-outline:active {
            transform: scale(0.98);
        }

        /* ===== Content Section ===== */
        .content-section {
            padding: 72px 0 80px;
        }

        .main-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 36px;
        }

        .section-label {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 999px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
        }

        .section-title {
            font-size: clamp(28px, 4vw, 38px);
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-main);
            margin: 16px 0 14px;
        }

        .intro-paragraph {
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-secondary);
            margin-bottom: 18px;
        }

        .feature-list {
            display: grid;
            gap: 14px;
            margin-top: 28px;
        }

        .feature-item {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 14px 18px;
            transition: all .25s ease;
        }

        .feature-item:hover {
            border-color: rgba(27, 127, 191, 0.4);
            box-shadow: var(--shadow);
        }

        .feature-icon {
            width: 36px;
            height: 36px;
            flex-shrink: 0;
            border-radius: 10px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
        }

        .feature-text {
            font-size: 15px;
            line-height: 1.6;
            color: var(--text-main);
            font-weight: 500;
        }

        /* ===== Sidebar ===== */
        .side-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 24px;
            margin-bottom: 20px;
        }

        .side-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .side-title::before {
            content: "";
            width: 4px;
            height: 18px;
            border-radius: 4px;
            background: var(--primary);
        }

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

        .side-link {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 16px;
            border-radius: 10px;
            background: var(--bg);
            border: 1px solid var(--border);
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            transition: all .25s ease;
        }

        .side-link:hover {
            color: var(--primary);
            border-color: rgba(27, 127, 191, 0.4);
            background: var(--primary-light);
        }

        .side-link.active {
            background: var(--primary);
            color: #FFFFFF;
            border-color: var(--primary);
        }

        .side-link .fa-chevron-right {
            font-size: 12px;
            opacity: .5;
        }

        /* ===== FAQ ===== */
        .faq-item {
            border-bottom: 1px solid var(--divider);
        }

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

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            cursor: pointer;
            padding: 16px 0;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            list-style: none;
        }

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

        .faq-item .faq-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-style: normal;
            flex-shrink: 0;
            transition: transform .25s ease;
        }

        .faq-item[open] .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #FFFFFF;
        }

        .faq-content {
            padding: 0 0 18px;
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
        }

        /* ===== CTA Card ===== */
        .cta-card {
            background: linear-gradient(135deg, #1B7FBF, #14689E);
            border-radius: var(--radius);
            padding: 28px;
            color: #FFFFFF;
            box-shadow: 0 16px 36px rgba(27, 127, 191, 0.25);
        }

        .cta-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin: 0 0 10px;
        }

        .cta-card p {
            font-size: 14px;
            line-height: 1.7;
            opacity: .92;
            margin: 0 0 20px;
        }

        .btn-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 10px;
            background: #FFFFFF;
            color: var(--primary);
            font-weight: 600;
            font-size: 14px;
            border: none;
            cursor: pointer;
            transition: all .25s ease;
        }

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

        /* ===== Recommend ===== */
        .recommend-section {
            background: var(--divider);
            padding: 80px 0;
        }

        .rec-card {
            background: var(--card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all .3s ease;
            display: flex;
            flex-direction: column;
            height: 100%;
        }

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

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

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

        .rec-card-title {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .rec-card-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 16px;
            flex: 1;
        }

        .btn-sm {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: 10px;
            background: var(--primary);
            color: #FFFFFF;
            font-size: 13px;
            font-weight: 600;
            width: fit-content;
            border: none;
            cursor: pointer;
            transition: all .25s ease;
        }

        .btn-sm:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #16233A;
            color: #B8C4D0;
            padding-top: 64px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 48px;
        }

        .footer-brand .brand-text {
            font-size: 24px;
            font-weight: 800;
            color: #FFFFFF;
        }

        .footer-brand .brand-text span {
            color: var(--highlight);
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: #8A98A8;
            margin-top: 16px;
            max-width: 320px;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
        }

        .footer-link-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
            font-size: 14px;
        }

        .footer-link-list a {
            color: #B8C4D0;
            transition: color .25s ease;
        }

        .footer-link-list a:hover {
            color: #FFFFFF;
        }

        .footer-contact-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
            font-size: 14px;
            color: #B8C4D0;
        }

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

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            font-size: 13px;
            color: #8A98A8;
        }

        .footer-bottom p {
            margin: 0;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .cat-hero {
                padding: 72px 0 64px;
            }

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

        @media (max-width: 768px) {
            .nav-wrap {
                flex-wrap: wrap;
                gap: 12px;
            }

            .nav-chip-wrap {
                order: 3;
                width: 100%;
                justify-content: flex-start;
            }

            .cat-hero {
                padding: 56px 0 48px;
                text-align: center;
            }

            .hero-title {
                font-size: 36px;
            }

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

            .content-section {
                padding: 48px 0 56px;
            }

            .main-card {
                padding: 24px 20px;
            }

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

        @media (max-width: 520px) {
            .nav-wrap {
                gap: 10px;
            }

            .nav-cta {
                padding: 10px 12px;
            }

            .nav-cta .nav-cta-text {
                display: none;
            }

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

            .btn-primary,
            .btn-outline {
                width: 100%;
                justify-content: center;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
                gap: 12px;
            }

            .section-title {
                font-size: 28px;
            }
        }

/* roulang page: article */
:root {
            --primary: #1B7FBF;
            --primary-dark: #14689E;
            --primary-light: #EAF2F9;
            --accent: #34A67C;
            --highlight: #EFA23E;
            --bg: #F5F8FB;
            --card-bg: #FFFFFF;
            --hero-bg: #EAF2F9;
            --text-main: #16233A;
            --text-secondary: #5B6B80;
            --text-muted: #8A98A8;
            --text-white: #FFFFFF;
            --border: #E5EBF0;
            --divider: #EDF1F5;
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-pill: 999px;
            --shadow-default: 0 12px 32px rgba(22, 35, 58, 0.07);
            --shadow-hover: 0 20px 48px rgba(22, 35, 58, 0.12);
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg);
            color: var(--text-main);
            line-height: 1.6;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.4;
            transition: all 0.25s ease;
            border: none;
            cursor: pointer;
        }
        .btn-primary {
            background: var(--primary);
            color: var(--text-white);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        .btn-primary:active {
            background: #0F5A8C;
            transform: translateY(0);
            box-shadow: none;
        }
        .btn-secondary {
            background: var(--text-white);
            color: var(--primary);
            border: 1.5px solid var(--primary);
        }
        .btn-secondary:hover {
            background: var(--primary-light);
        }
        .btn-secondary:active {
            transform: scale(0.98);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 14px;
            border-radius: 8px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.97);
            border-bottom: 1px solid var(--divider);
            padding: 14px 0;
            box-shadow: 0 2px 8px rgba(22, 35, 58, 0.04);
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            gap: 24px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary) 0%, #2F9BD3 100%);
            position: relative;
            flex-shrink: 0;
        }
        .brand-icon::before {
            content: '';
            position: absolute;
            inset: 8px;
            border-radius: 6px;
            background: rgba(255, 255, 255, 0.25);
            box-shadow: 0 0 12px rgba(255, 255, 255, 0.6) inset;
        }
        .brand-text {
            font-size: 20px;
            font-weight: 800;
            letter-spacing: 0.5px;
            color: var(--text-main);
            white-space: nowrap;
        }
        .brand-text span {
            color: var(--primary);
        }
        .nav-chip-wrap {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            justify-content: center;
        }
        .nav-chip {
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            background: var(--text-white);
            border: 1px solid var(--border);
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        .nav-chip:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: var(--primary);
        }
        .nav-chip.active {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 18px;
            border-radius: var(--radius-btn);
            background: var(--text-white);
            color: var(--primary);
            border: 1.5px solid var(--primary);
            font-size: 14px;
            font-weight: 600;
            transition: all 0.2s ease;
            white-space: nowrap;
            cursor: pointer;
        }
        .nav-cta:hover {
            background: var(--primary);
            color: var(--text-white);
        }
        .nav-cta:active {
            transform: scale(0.97);
        }
        .breadcrumb-wrap {
            padding: 24px 0 4px;
            background: var(--bg);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .current {
            color: var(--text-secondary);
            max-width: 260px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }
        .breadcrumb-divider {
            color: var(--border);
        }
        .article-main {
            padding: 32px 0 48px;
        }
        .article-card {
            background: var(--card-bg);
            border-radius: 20px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-default);
            padding: 0;
            overflow: hidden;
            max-width: 920px;
            margin: 0 auto;
        }
        .article-header {
            padding: 48px 56px 0;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 24px;
        }
        .meta-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: var(--radius-pill);
        }
        .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .meta-item i {
            color: var(--primary);
            font-size: 13px;
        }
        .article-header h1 {
            font-size: clamp(28px, 4vw, 38px);
            font-weight: 700;
            line-height: 1.4;
            color: var(--text-main);
            letter-spacing: 0.5px;
            margin: 0 0 28px;
        }
        .article-cover {
            width: 100%;
            height: 400px;
            object-fit: cover;
            margin: 0;
        }
        .article-body {
            padding: 0 56px 0;
            max-width: 760px;
            margin: 0 auto;
        }
        .article-content {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-main);
            padding: 40px 0;
        }
        .article-content h2 {
            font-size: 24px;
            font-weight: 700;
            line-height: 1.4;
            margin: 40px 0 18px;
            color: var(--text-main);
            padding-bottom: 10px;
            border-bottom: 1px solid var(--divider);
        }
        .article-content h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.45;
            margin: 32px 0 14px;
            color: var(--text-main);
        }
        .article-content h4 {
            font-size: 17px;
            font-weight: 600;
            margin: 24px 0 12px;
            color: var(--text-main);
        }
        .article-content p {
            margin: 0 0 20px;
        }
        .article-content img {
            border-radius: var(--radius-card);
            margin: 28px auto;
            max-width: 100%;
            height: auto;
        }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 20px 24px;
            border-radius: 0 var(--radius-card) var(--radius-card) 0;
            margin: 32px 0;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .article-content blockquote p:last-child {
            margin-bottom: 0;
        }
        .article-content ul {
            margin: 20px 0;
            padding-left: 0;
            list-style: none;
        }
        .article-content ul li {
            position: relative;
            padding-left: 22px;
            margin-bottom: 10px;
        }
        .article-content ul li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 10px;
            width: 8px;
            height: 8px;
            border-radius: 2px;
            background: var(--primary);
        }
        .article-content ol {
            margin: 20px 0;
            padding-left: 24px;
        }
        .article-content ol li {
            margin-bottom: 10px;
            padding-left: 6px;
        }
        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
            text-decoration-color: rgba(27, 127, 191, 0.4);
        }
        .article-content a:hover {
            text-decoration-color: var(--primary);
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 15px;
        }
        .article-content th,
        .article-content td {
            border: 1px solid var(--divider);
            padding: 12px 16px;
            text-align: left;
        }
        .article-content th {
            background: var(--primary-light);
            font-weight: 600;
            color: var(--text-main);
        }
        .article-content tr:nth-child(even) td {
            background: #F8FAFC;
        }
        .article-content pre {
            background: #0F172A;
            color: #E2E8F0;
            padding: 24px;
            border-radius: 12px;
            overflow-x: auto;
            font-size: 14px;
            line-height: 1.8;
            margin: 28px 0;
        }
        .article-content code {
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 13px;
            padding: 2px 6px;
            border-radius: 4px;
        }
        .article-content pre code {
            background: transparent;
            color: inherit;
            padding: 0;
            font-size: inherit;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            padding: 0 0 32px;
            border-bottom: 1px solid var(--divider);
        }
        .post-tag {
            display: inline-flex;
            align-items: center;
            padding: 5px 14px;
            border-radius: var(--radius-pill);
            background: var(--bg);
            color: var(--text-secondary);
            font-size: 13px;
            font-weight: 500;
            border: 1px solid var(--border);
            transition: all 0.2s ease;
        }
        .post-tag:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: var(--primary);
        }
        .post-nav {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            padding: 24px 0 40px;
        }
        .post-nav-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 18px 20px;
            transition: all 0.25s ease;
            display: block;
        }
        .post-nav-card:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            box-shadow: var(--shadow-default);
        }
        .post-nav-card:active {
            transform: scale(0.98);
        }
        .post-nav-card-next {
            text-align: right;
        }
        .post-nav-label {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 8px;
        }
        .post-nav-card-next .post-nav-label {
            justify-content: flex-end;
        }
        .post-nav-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            display: block;
            line-height: 1.5;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }
        .not-found-card {
            max-width: 680px;
            margin: 40px auto 60px;
            background: var(--card-bg);
            border-radius: 20px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-default);
            text-align: center;
            padding: 72px 32px;
        }
        .not-found-icon {
            width: 80px;
            height: 80px;
            border-radius: 20px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 24px;
            color: var(--primary);
            font-size: 32px;
        }
        .not-found-card h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .not-found-card p {
            color: var(--text-secondary);
            margin-bottom: 28px;
            font-size: 15px;
            line-height: 1.7;
        }
        .related-section {
            padding: 64px 0;
            background: var(--bg);
        }
        .section-head {
            text-align: center;
            margin-bottom: 40px;
        }
        .section-head .tagline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 16px;
            border-radius: var(--radius-pill);
            margin-bottom: 14px;
        }
        .section-head h2 {
            font-size: clamp(26px, 3.5vw, 34px);
            font-weight: 700;
            color: var(--text-main);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            display: flex;
            background: var(--card-bg);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-default);
            border: 1px solid var(--border);
            transition: all 0.25s ease;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .related-card:active {
            transform: scale(0.98);
        }
        .related-card img {
            width: 160px;
            object-fit: cover;
            flex-shrink: 0;
        }
        .related-card-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            gap: 8px;
            min-width: 0;
        }
        .related-card-body h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.4;
            overflow: hidden;
            text-overflow: ellipsis;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }
        .related-card-body p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
            overflow: hidden;
            text-overflow: ellipsis;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }
        .related-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .related-link i {
            font-size: 12px;
            transition: transform 0.2s ease;
        }
        .related-card:hover .related-link i {
            transform: translateX(4px);
        }
        .cta-section {
            background: var(--primary-light);
            padding: 72px 0;
        }
        .cta-inner {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            max-width: 1000px;
            margin: 0 auto;
        }
        .cta-copy h2 {
            font-size: clamp(26px, 3.5vw, 34px);
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
            line-height: 1.4;
        }
        .cta-copy p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 24px;
        }
        .cta-contact-row {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
            color: var(--text-secondary);
            font-size: 14px;
        }
        .cta-contact-row i {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--card-bg);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            box-shadow: var(--shadow-default);
        }
        .cta-form-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: 32px;
            box-shadow: var(--shadow-default);
            border: 1px solid var(--border);
        }
        .cta-form-card h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .cta-form-card .sub {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 6px;
        }
        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border);
            border-radius: 10px;
            font-size: 14px;
            color: var(--text-main);
            background: var(--text-white);
            transition: all 0.2s ease;
            outline: none;
        }
        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(27, 127, 191, 0.15);
        }
        .form-control::placeholder {
            color: var(--text-muted);
        }
        textarea.form-control {
            min-height: 80px;
            resize: vertical;
        }
        .site-footer {
            background: #132238;
            color: #A7B4C4;
            padding-top: 64px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
        }
        .footer-brand .brand-text {
            color: var(--text-white);
            font-size: 22px;
            margin-bottom: 16px;
            display: block;
        }
        .footer-brand .brand-text span {
            color: #5FB3E0;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: #94A3B8;
            max-width: 320px;
        }
        .footer-title {
            color: var(--text-white);
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 24px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .footer-link-list,
        .footer-contact-list {
            list-style: none;
            padding: 0;
        }
        .footer-link-list li {
            margin-bottom: 10px;
        }
        .footer-link-list a {
            color: #94A3B8;
            font-size: 14px;
            transition: all 0.2s ease;
        }
        .footer-link-list a:hover {
            color: #5FB3E0;
            padding-left: 4px;
        }
        .footer-contact-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            color: #94A3B8;
            margin-bottom: 12px;
            line-height: 1.6;
        }
        .footer-contact-list i {
            color: #5FB3E0;
            margin-top: 4px;
            width: 16px;
            text-align: center;
            flex-shrink: 0;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: #64748B;
        }
        @media (max-width: 768px) {
            .nav-wrap {
                gap: 10px;
            }
            .nav-chip-wrap {
                overflow-x: auto;
                justify-content: flex-start;
                -webkit-overflow-scrolling: touch;
                padding: 4px 0;
                scrollbar-width: none;
            }
            .nav-chip-wrap::-webkit-scrollbar {
                display: none;
            }
            .nav-cta {
                padding: 8px 12px;
                font-size: 13px;
                flex-shrink: 0;
            }
            .brand-text {
                font-size: 17px;
            }
            .article-header {
                padding: 32px 24px 0;
            }
            .article-body {
                padding: 0 24px;
            }
            .article-cover {
                height: 240px;
            }
            .article-content {
                padding: 28px 0;
            }
            .post-nav {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .post-nav-card-next {
                text-align: left;
            }
            .post-nav-card-next .post-nav-label {
                justify-content: flex-start;
            }
            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .related-card img {
                width: 140px;
            }
            .cta-inner {
                grid-template-columns: 1fr;
                gap: 32px;
                padding: 0 16px;
            }
            .cta-form-card {
                padding: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 520px) {
            .nav-cta span {
                display: none;
            }
            .nav-cta {
                padding: 8px 10px;
            }
            .brand-text {
                font-size: 15px;
            }
            .brand-icon {
                width: 32px;
                height: 32px;
            }
            .article-header h1 {
                font-size: 24px;
                line-height: 1.4;
            }
            .article-meta {
                gap: 10px;
            }
            .article-cover {
                height: 180px;
            }
            .article-body {
                padding: 0 20px;
            }
            .article-content {
                font-size: 15px;
            }
            .article-content h2 {
                font-size: 20px;
            }
            .related-card {
                flex-direction: column;
            }
            .related-card img {
                width: 100%;
                height: 180px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .cta-section {
                padding: 48px 0;
            }
            .btn {
                padding: 12px 24px;
                font-size: 14px;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #1B7FBF;
            --primary-dark: #14689E;
            --primary-light: #EAF2F9;
            --accent: #34A67C;
            --highlight: #EFA23E;
            --bg: #F5F8FB;
            --card-bg: #FFFFFF;
            --text: #16233A;
            --text-secondary: #5B6B80;
            --text-muted: #8A98A8;
            --white: #FFFFFF;
            --border: #E5EBF0;
            --divider: #EDF1F5;
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-pill: 999px;
            --shadow: 0 12px 32px rgba(22, 35, 58, 0.07);
            --shadow-hover: 0 20px 48px rgba(22, 35, 58, 0.12);
            --transition: 0.25s ease;
            --navbar-h: 76px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease;
        }

        ul,
        ol {
            list-style: none;
        }

        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            background: none;
            outline: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.95);
            border-bottom: 1px solid var(--border);
            backdrop-filter: blur(8px);
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            height: var(--navbar-h);
        }

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

        .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary) 30%, var(--accent) 100%);
            display: block;
            position: relative;
            box-shadow: 0 6px 16px rgba(27, 127, 191, 0.25);
        }

        .brand-icon::before {
            content: "";
            position: absolute;
            inset: 10px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.9);
            box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.25);
        }

        .brand-text {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: 1px;
            color: var(--text);
            line-height: 1.2;
        }

        .brand-text span {
            color: var(--primary);
        }

        .nav-chip-wrap {
            display: flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            border: 1px solid var(--border);
            border-radius: var(--radius-pill);
            padding: 4px 6px;
            overflow-x: auto;
            scrollbar-width: none;
            flex-shrink: 0;
            max-width: 68%;
        }

        .nav-chip-wrap::-webkit-scrollbar {
            display: none;
        }

        .nav-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            color: var(--text-secondary);
            transition: all .25s ease;
            border: 1px solid transparent;
        }

        .nav-chip:hover {
            background: var(--white);
            color: var(--primary);
            border-color: var(--primary);
        }

        .nav-chip.active {
            background: var(--primary);
            color: var(--white);
            border-color: var(--primary);
            box-shadow: 0 4px 12px rgba(27, 127, 191, 0.2);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: var(--white);
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            transition: all .25s ease;
            flex-shrink: 0;
            box-shadow: 0 4px 12px rgba(27, 127, 191, 0.2);
        }

        .nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(27, 127, 191, 0.28);
        }

        .nav-cta:active {
            transform: translateY(1px);
        }

        .nav-cta i {
            font-size: 15px;
        }

        /* ===== Hero ===== */
        .page-hero {
            position: relative;
            padding: 90px 0 80px;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            background-color: var(--primary-light);
        }

        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.82) 45%, rgba(255, 255, 255, 0.55) 100%);
        }

        .page-hero .container {
            position: relative;
            z-index: 1;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: var(--white);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            margin-bottom: 18px;
            box-shadow: 0 4px 14px rgba(27, 127, 191, 0.25);
        }

        .page-hero h1 {
            font-size: clamp(34px, 4.8vw, 52px);
            font-weight: 800;
            line-height: 1.25;
            color: var(--text);
            max-width: 760px;
            margin-bottom: 16px;
        }

        .page-hero h1 .dot {
            color: var(--primary);
        }

        .page-hero .hero-sub {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.7;
            margin-bottom: 30px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            padding: 13px 30px;
            border-radius: var(--radius-btn);
            cursor: pointer;
            transition: all .25s ease;
            border: 1.5px solid transparent;
            line-height: 1.4;
        }

        .btn i {
            font-size: 14px;
        }

        .btn-primary {
            background: var(--primary);
            color: var(--white);
            box-shadow: 0 6px 18px rgba(27, 127, 191, 0.22);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 26px rgba(27, 127, 191, 0.3);
        }

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

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

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

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

        .btn-ghost {
            background: rgba(255, 255, 255, 0.7);
            color: var(--text);
            border-color: var(--border);
        }

        .btn-ghost:hover {
            background: var(--white);
            border-color: var(--primary);
            color: var(--primary);
        }

        /* ===== Main Content ===== */
        .main-content {
            padding: 72px 0 48px;
        }

        .category-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 380px;
            gap: 40px;
            align-items: start;
        }

        .content-col {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }

        .article-panel {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            padding: 36px;
            transition: box-shadow .3s ease;
        }

        .article-panel:hover {
            box-shadow: var(--shadow-hover);
        }

        .article-panel h2 {
            font-size: clamp(24px, 3vw, 30px);
            font-weight: 700;
            line-height: 1.35;
            color: var(--text);
            margin-bottom: 18px;
            position: relative;
            padding-left: 16px;
        }

        .article-panel h2::before {
            content: "";
            position: absolute;
            left: 0;
            top: 6px;
            bottom: 6px;
            width: 4px;
            border-radius: 4px;
            background: var(--primary);
        }

        .article-panel p {
            color: var(--text-secondary);
            font-size: 16px;
            line-height: 1.75;
            margin-bottom: 18px;
        }

        .article-panel .media-img {
            border-radius: 12px;
            overflow: hidden;
            margin: 22px 0;
            border: 1px solid var(--border);
        }

        .article-panel .media-img img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }

        .feature-list {
            margin-top: 10px;
        }

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid var(--divider);
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .feature-list li:last-child {
            border-bottom: none;
        }

        .feature-list li i {
            color: var(--accent);
            font-size: 16px;
            margin-top: 3px;
            flex-shrink: 0;
        }

        .feature-list li strong {
            color: var(--text);
            font-weight: 600;
        }

        /* Timeline */
        .timeline-block {
            margin-top: 24px;
        }

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

        .timeline-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .timeline-item {
            display: flex;
            gap: 18px;
            position: relative;
            padding-bottom: 26px;
        }

        .timeline-item:last-child {
            padding-bottom: 0;
        }

        .timeline-item::before {
            content: "";
            position: absolute;
            left: 17px;
            top: 36px;
            bottom: -4px;
            width: 2px;
            background: var(--border);
        }

        .timeline-item:last-child::before {
            display: none;
        }

        .timeline-num {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 14px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            position: relative;
            z-index: 1;
            border: 2px solid var(--white);
            box-shadow: 0 0 0 2px var(--primary);
        }

        .timeline-body h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 6px;
        }

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

        /* ===== Sidebar ===== */
        .sidebar-col {
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: calc(var(--navbar-h) + 24px);
        }

        .side-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            padding: 28px;
            transition: box-shadow .3s ease;
        }

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

        .side-card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .side-card-title i {
            color: var(--primary);
            font-size: 18px;
        }

        .side-nav-list {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .side-nav-list a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 11px 16px;
            border-radius: 10px;
            background: var(--bg);
            border: 1px solid transparent;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all .25s ease;
        }

        .side-nav-list a i {
            font-size: 12px;
            opacity: 0.6;
            transition: transform .25s ease;
        }

        .side-nav-list a:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: var(--primary);
            transform: translateX(4px);
        }

        .side-nav-list a:hover i {
            transform: translateX(2px);
            opacity: 1;
        }

        .side-nav-list a.current {
            background: var(--primary);
            color: var(--white);
            border-color: var(--primary);
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(27, 127, 191, 0.2);
        }

        /* Data snapshot */
        .data-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 14px;
        }

        .data-item {
            background: var(--bg);
            border-radius: 12px;
            padding: 18px 14px;
            text-align: center;
            border: 1px solid var(--divider);
        }

        .data-item .num {
            font-size: 26px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }

        .data-item .label {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .faq-item {
            border-bottom: 1px solid var(--divider);
        }

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

        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            padding: 15px 0;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            text-align: left;
            background: none;
            transition: color .2s ease;
        }

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

        .faq-question i {
            flex-shrink: 0;
            font-size: 14px;
            color: var(--primary);
            transition: transform .3s ease;
        }

        .faq-item.active .faq-question i {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .3s ease;
        }

        .faq-answer-inner {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            padding: 0 0 16px;
        }

        /* ===== Side CTA ===== */
        .side-cta {
            background: linear-gradient(135deg, var(--primary) 0%, #14689E 100%);
            border: none;
            color: var(--white);
            position: relative;
            overflow: hidden;
        }

        .side-cta::after {
            content: "";
            position: absolute;
            right: -40px;
            top: -40px;
            width: 140px;
            height: 140px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
        }

        .side-cta h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
            color: var(--white);
        }

        .side-cta p {
            font-size: 14px;
            opacity: 0.9;
            line-height: 1.6;
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
            color: var(--white);
        }

        .side-cta .btn {
            background: var(--white);
            color: var(--primary);
            font-size: 14px;
            padding: 11px 24px;
            width: 100%;
            position: relative;
            z-index: 1;
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
        }

        .side-cta .btn:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
        }

        /* ===== Recommend ===== */
        .recommend-section {
            padding: 48px 0 72px;
        }

        .recommend-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            margin-bottom: 32px;
            gap: 16px;
        }

        .recommend-header h2 {
            font-size: clamp(24px, 3vw, 30px);
            font-weight: 700;
            line-height: 1.3;
        }

        .recommend-header h2 span {
            color: var(--primary);
        }

        .recommend-header p {
            color: var(--text-muted);
            font-size: 14px;
        }

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

        .recommend-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all .3s ease;
            display: flex;
            flex-direction: column;
        }

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

        .recommend-card .rec-img {
            height: 180px;
            overflow: hidden;
            position: relative;
        }

        .recommend-card .rec-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }

        .recommend-card:hover .rec-img img {
            transform: scale(1.04);
        }

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

        .rec-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            border-radius: var(--radius-pill);
            padding: 4px 12px;
            align-self: flex-start;
            margin-bottom: 12px;
        }

        .recommend-card h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.45;
            margin-bottom: 8px;
        }

        .recommend-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .rec-link {
            margin-top: auto;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
        }

        .rec-link i {
            font-size: 12px;
            transition: transform .25s ease;
        }

        .rec-link:hover i {
            transform: translateX(4px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #16233A;
            color: #B7C3D0;
            margin-top: 0;
        }

        .site-footer .container {
            padding-top: 56px;
            padding-bottom: 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
        }

        .footer-brand .brand-text {
            color: var(--white);
            font-size: 24px;
            margin-bottom: 14px;
        }

        .footer-brand .brand-text span {
            color: #6CB7E8;
        }

        .footer-desc {
            font-size: 14px;
            color: #93A3B5;
            line-height: 1.8;
            max-width: 280px;
        }

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

        .footer-link-list li,
        .footer-contact-list li {
            margin-bottom: 10px;
        }

        .footer-link-list a {
            font-size: 14px;
            color: #93A3B5;
            transition: color .2s ease;
        }

        .footer-link-list a:hover {
            color: #6CB7E8;
        }

        .footer-contact-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            color: #93A3B5;
            line-height: 1.6;
        }

        .footer-contact-list i {
            color: #6CB7E8;
            margin-top: 3px;
            font-size: 14px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 13px;
            color: #6B7C8F;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .category-layout {
                grid-template-columns: minmax(0, 1fr) 340px;
                gap: 28px;
            }

            .nav-chip-wrap {
                max-width: 62%;
            }

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

        @media (max-width: 768px) {
            .nav-wrap {
                height: auto;
                flex-wrap: wrap;
                padding: 12px 0;
                gap: 10px;
            }

            .brand-logo {
                flex: 1;
            }

            .nav-chip-wrap {
                order: 3;
                width: 100%;
                max-width: 100%;
                padding: 4px;
            }

            .nav-cta {
                padding: 8px 16px;
                font-size: 13px;
            }

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

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

            .page-hero {
                padding: 56px 0 48px;
                text-align: center;
            }

            .page-hero h1 {
                font-size: 30px;
                margin-left: auto;
                margin-right: auto;
            }

            .page-hero .hero-sub {
                font-size: 15px;
                margin-left: auto;
                margin-right: auto;
            }

            .hero-actions {
                justify-content: center;
            }

            .category-layout {
                grid-template-columns: 1fr;
            }

            .sidebar-col {
                position: static;
            }

            .main-content {
                padding: 40px 0;
            }

            .article-panel {
                padding: 24px;
            }

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

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

            .footer-bottom {
                padding: 16px;
            }
        }

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

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

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

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

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

            .nav-cta .fa-comments {
                display: none;
            }

            .nav-cta {
                padding: 8px 14px;
                font-size: 13px;
            }

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

            .brand-icon::before {
                inset: 8px;
            }

            .brand-text {
                font-size: 16px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #1B7FBF;
            --primary-dark: #14689E;
            --primary-light: #EAF2F9;
            --accent: #34A67C;
            --highlight: #EFA23E;
            --bg: #F5F8FB;
            --card: #FFFFFF;
            --text: #16233A;
            --text-secondary: #5B6B80;
            --text-muted: #8A98A8;
            --border: #E5EBF0;
            --divider: #EDF1F5;
            --radius-lg: 16px;
            --radius-md: 10px;
            --radius-pill: 999px;
            --shadow: 0 12px 32px rgba(22, 35, 58, .07);
            --shadow-hover: 0 20px 48px rgba(22, 35, 58, .12);
            --container: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            color: inherit;
        }

        button,
        input,
        textarea {
            font: inherit;
        }

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

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: #fff;
            border-bottom: 1px solid var(--divider);
            box-shadow: 0 2px 12px rgba(22, 35, 58, .04);
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            gap: 24px;
            min-height: 72px;
        }

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

        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            position: relative;
            box-shadow: 0 6px 16px rgba(27, 127, 191, .25);
        }

        .brand-icon::after {
            content: "";
            position: absolute;
            inset: 10px;
            background: rgba(255, 255, 255, .92);
            border-radius: 50%;
            box-shadow: 0 0 0 4px rgba(255, 255, 255, .25);
        }

        .brand-text {
            font-size: 20px;
            font-weight: 800;
            letter-spacing: .5px;
            color: var(--text);
        }

        .brand-text span {
            color: var(--primary);
        }

        .nav-chip-wrap {
            display: flex;
            gap: 8px;
            padding: 4px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-pill);
            margin: 0 auto;
            overflow-x: auto;
            scrollbar-width: none;
        }

        .nav-chip-wrap::-webkit-scrollbar {
            display: none;
        }

        .nav-chip {
            display: inline-flex;
            align-items: center;
            white-space: nowrap;
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            border: 1px solid var(--border);
            background: #fff;
            transition: all .2s;
        }

        .nav-chip:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: var(--primary);
        }

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

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 14px;
            flex-shrink: 0;
            transition: all .2s;
        }

        .nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
        }

        .nav-cta:active {
            transform: scale(.98);
        }

        /* ===== 按钮 ===== */
        .btn-primary,
        .btn-secondary,
        .btn-light {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 15px;
            transition: all .2s;
            cursor: pointer;
            border: none;
        }

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

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            background: #0F567F;
            transform: translateY(0);
        }

        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border: 1.5px solid var(--primary);
        }

        .btn-secondary:hover {
            background: var(--primary-light);
        }

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

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

        .btn-block {
            width: 100%;
        }

        /* ===== Hero ===== */
        .cat-hero {
            background-size: cover;
            background-position: center;
            padding: 110px 0 90px;
            position: relative;
        }

        .cat-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(255, 255, 255, .95) 0%, rgba(255, 255, 255, .78) 45%, rgba(255, 255, 255, .55) 100%);
        }

        .hero-inner {
            position: relative;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-pill);
            padding: 6px 16px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            box-shadow: var(--shadow);
        }

        .cat-hero h1 {
            font-size: clamp(38px, 5vw, 54px);
            font-weight: 800;
            line-height: 1.2;
            margin: 18px 0 16px;
            color: var(--text);
        }

        .cat-hero p {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 640px;
        }

        .hero-actions {
            margin-top: 32px;
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== 标签 ===== */
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 6px 14px;
            border-radius: var(--radius-pill);
        }

        /* ===== 主内容两栏 ===== */
        .main-wrap {
            padding-top: 96px;
            padding-bottom: 48px;
        }

        .main-grid {
            display: grid;
            grid-template-columns: 1fr 360px;
            gap: 48px;
            align-items: start;
        }

        .content-col {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 40px;
            box-shadow: var(--shadow);
        }

        .content-col h2 {
            font-size: 30px;
            font-weight: 700;
            margin: 14px 0 18px;
            line-height: 1.35;
        }

        .content-col p {
            color: var(--text-secondary);
            margin-bottom: 20px;
        }

        .content-col img {
            border-radius: 12px;
            margin: 24px 0;
        }

        .point-list {
            list-style: none;
            margin-top: 8px;
        }

        .point-list li {
            display: flex;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid var(--divider);
            align-items: flex-start;
            font-weight: 500;
        }

        .point-list li:last-child {
            border-bottom: none;
        }

        .point-list i {
            color: var(--accent);
            margin-top: 4px;
            font-size: 15px;
        }

        /* ===== 侧边栏 ===== */
        .side-col {
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: 96px;
        }

        .side-card,
        .faq-card,
        .cta-mini-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow);
        }

        .side-card h3,
        .faq-card h3,
        .cta-mini-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 18px;
        }

        .side-links {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .side-links a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 14px;
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 600;
            color: var(--text-secondary);
            transition: all .2s;
        }

        .side-links a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        /* ===== FAQ ===== */
        .faq-item {
            border-top: 1px solid var(--divider);
        }

        .faq-item:first-of-type {
            border-top: none;
        }

        .faq-item summary {
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 0;
            font-weight: 600;
            font-size: 15px;
            color: var(--text);
            transition: color .2s;
        }

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

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

        .faq-item summary::after {
            content: "+";
            font-size: 20px;
            color: var(--primary);
            font-weight: 700;
            transition: transform .25s;
        }

        .faq-item[open] summary::after {
            content: "−";
        }

        .faq-item p {
            font-size: 14px;
            color: var(--text-secondary);
            padding: 0 0 16px;
            line-height: 1.7;
        }

        /* ===== CTA小卡 ===== */
        .cta-mini-card {
            background: var(--primary);
            color: #fff;
            border: none;
        }

        .cta-mini-card h3,
        .cta-mini-card p {
            color: #fff;
        }

        .cta-mini-card p {
            font-size: 14px;
            margin: 10px 0 20px;
            opacity: .88;
        }

        /* ===== 项目类型 ===== */
        .type-section {
            padding: 96px 0;
        }

        .section-header {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 56px;
        }

        .section-header h2 {
            font-size: clamp(28px, 4vw, 38px);
            font-weight: 800;
            line-height: 1.35;
            margin-top: 14px;
        }

        .section-header p {
            color: var(--text-secondary);
            margin-top: 12px;
        }

        .type-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .type-item {
            display: grid;
            grid-template-columns: 80px 1fr 2fr;
            gap: 24px;
            align-items: center;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow);
            transition: all .25s;
        }

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

        .type-num {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            opacity: .3;
            line-height: 1;
        }

        .type-item h3 {
            font-size: 20px;
            font-weight: 700;
        }

        .type-item p {
            color: var(--text-secondary);
            font-size: 15px;
        }

        /* ===== 流程 ===== */
        .process-section {
            padding: 96px 0;
            background: #fff;
        }

        .process-timeline {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
            margin-top: 56px;
        }

        .process-step {
            text-align: center;
            padding: 32px 20px;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            background: var(--bg);
            position: relative;
        }

        .process-step .step-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin: 0 auto 16px;
            font-size: 15px;
        }

        .process-step h3 {
            font-size: 16px;
            font-weight: 700;
        }

        .process-step p {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        /* ===== 数据 ===== */
        .stats-section {
            background: var(--primary-light);
            padding: 80px 0;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }

        .stat-item {
            text-align: center;
        }

        .stat-num {
            font-size: 48px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 10px;
        }

        /* ===== 推荐 ===== */
        .rec-section {
            padding: 96px 0;
        }

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

        .rec-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all .25s;
            display: block;
        }

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

        .rec-card:active {
            transform: scale(.98);
        }

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

        .rec-body {
            padding: 24px;
        }

        .rec-body h3 {
            font-size: 18px;
            font-weight: 700;
        }

        .rec-body p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 10px 0 16px;
        }

        .rec-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            gap: 6px;
            align-items: center;
            transition: gap .2s;
        }

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

        /* ===== CTA表单 ===== */
        .cta-section {
            background: var(--primary);
            color: #fff;
            padding: 90px 0;
            background-image: radial-gradient(circle at 90% 20%, rgba(255, 255, 255, .08) 0, transparent 40%);
        }

        .cta-section .section-tag {
            color: #fff;
            background: rgba(255, 255, 255, .16);
        }

        .cta-section h2 {
            font-size: clamp(28px, 4vw, 38px);
            font-weight: 800;
            color: #fff;
            line-height: 1.35;
            margin-top: 14px;
        }

        .cta-section p {
            color: rgba(255, 255, 255, .85);
            max-width: 520px;
            margin-top: 12px;
        }

        .cta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .cta-form {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow);
        }

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

        .cta-form input,
        .cta-form textarea {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 18px;
            background: #F8FAFC;
            transition: all .2s;
            color: var(--text);
        }

        .cta-form input:focus,
        .cta-form textarea:focus {
            border-color: var(--primary);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(27, 127, 191, .15);
            outline: none;
        }

        .cta-form textarea {
            min-height: 110px;
            resize: vertical;
        }

        .cta-form .form-note {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 10px;
            text-align: center;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--text);
            color: rgba(255, 255, 255, .72);
            padding: 64px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 40px;
            padding-bottom: 48px;
        }

        .footer-brand .brand-text {
            color: #fff;
            font-size: 22px;
        }

        .footer-brand .brand-text span {
            color: #6EC3F0;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            margin-top: 16px;
            max-width: 340px;
            color: rgba(255, 255, 255, .6);
        }

        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }

        .footer-link-list,
        .footer-contact-list {
            list-style: none;
        }

        .footer-link-list li,
        .footer-contact-list li {
            margin-bottom: 10px;
        }

        .footer-link-list a {
            font-size: 14px;
            color: rgba(255, 255, 255, .72);
            transition: color .2s;
        }

        .footer-link-list a:hover {
            color: #6EC3F0;
        }

        .footer-contact-list li {
            display: flex;
            gap: 10px;
            font-size: 14px;
            align-items: flex-start;
        }

        .footer-contact-list i {
            color: #6EC3F0;
            margin-top: 3px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding: 22px 0;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 13px;
            color: rgba(255, 255, 255, .45);
            margin: 0;
        }

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

            .side-col {
                position: static;
            }

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

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

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

        @media (max-width: 900px) {
            .nav-wrap {
                flex-wrap: wrap;
                min-height: auto;
                padding: 12px 0;
                gap: 12px;
            }

            .nav-chip-wrap {
                order: 3;
                width: 100%;
                margin: 0;
            }

            .nav-cta {
                margin-left: auto;
            }

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

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

        @media (max-width: 768px) {
            .cat-hero {
                padding: 70px 0 50px;
            }

            .cat-hero h1 {
                font-size: 34px;
            }

            .type-item {
                grid-template-columns: 1fr;
                gap: 8px;
                padding: 24px;
            }

            .type-num {
                font-size: 28px;
            }

            .content-col {
                padding: 24px;
            }

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

        @media (max-width: 600px) {
            .container {
                padding: 0 16px;
            }

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

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

            .process-timeline {
                grid-template-columns: 1fr;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                width: 100%;
            }
        }