/* roulang page: index */
/* ===== CSS 设计变量 ===== */
        :root {
            --primary: #2B7CE6;
            --primary-dark: #1A5CB8;
            --primary-light: rgba(43,124,230,0.08);
            --accent: #FF6B35;
            --accent-dark: #E55A2B;
            --bg-body: #F5F8FC;
            --bg-card: #FFFFFF;
            --bg-dark: #1A1A2E;
            --bg-dark-secondary: #22223A;
            --text-main: #1A1A2E;
            --text-secondary: #5C6B7A;
            --text-muted: #A0AAB5;
            --text-white: #FFFFFF;
            --border-color: #E9ECEF;
            --border-light: rgba(43,124,230,0.15);
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-xl: 16px;
            --shadow-card: 0 6px 20px rgba(0,0,0,0.05);
            --shadow-card-hover: 0 12px 30px rgba(0,0,0,0.10);
            --shadow-nav: 0 2px 10px rgba(0,0,0,0.08);
            --shadow-hero: 0 4px 30px rgba(0,0,0,0.3);
            --transition-base: all 0.3s ease;
            --font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --container-max: 1200px;
            --section-padding: 60px 0;
            --section-padding-mobile: 40px 0;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-main);
            background-color: var(--bg-body);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            margin-top: 0;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-main);
        }
        p {
            margin-top: 0;
            margin-bottom: 1rem;
            color: var(--text-secondary);
        }
        ul,
        ol {
            padding-left: 1.25rem;
        }

        /* ===== Container ===== */
        .container-custom {
            max-width: var(--container-max);
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        @media (max-width: 576px) {
            .container-custom {
                padding-left: 15px;
                padding-right: 15px;
            }
        }

        /* ===== Typography ===== */
        h1 {
            font-size: 32px;
            line-height: 1.3;
        }
        h2 {
            font-size: 24px;
            line-height: 1.4;
        }
        h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.4;
        }
        h4 {
            font-size: 18px;
            font-weight: 600;
        }
        .text-small {
            font-size: 14px;
            color: var(--text-secondary);
        }
        .text-muted-custom {
            color: var(--text-muted);
        }

        /* ===== Section Spacing ===== */
        .section-padding {
            padding: var(--section-padding);
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: var(--section-padding-mobile);
            }
        }

        /* ===== Navigation ===== */
        .navbar-custom {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.7);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            transition: background 0.4s ease, box-shadow 0.4s ease;
            padding: 0;
        }
        .navbar-custom.scrolled {
            background: rgba(255, 255, 255, 1);
            box-shadow: var(--shadow-nav);
        }
        .navbar-custom .navbar-brand {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: 0.5px;
            padding: 12px 0;
        }
        .navbar-custom .navbar-brand:hover {
            color: var(--primary);
        }
        .navbar-custom .navbar-brand .brand-highlight {
            color: var(--primary);
        }
        .navbar-custom .navbar-nav .nav-link {
            font-size: 16px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 16px;
            border-radius: var(--radius-md);
            transition: var(--transition-base);
            position: relative;
        }
        .navbar-custom .navbar-nav .nav-link:hover,
        .navbar-custom .navbar-nav .nav-link.active {
            color: var(--primary);
            background: var(--primary-light);
        }
        .navbar-custom .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        .navbar-custom .navbar-toggler {
            border: none;
            padding: 4px 8px;
            color: var(--text-main);
        }
        .navbar-custom .navbar-toggler:focus {
            box-shadow: none;
        }
        .navbar-custom .navbar-toggler-icon {
            background-image: none;
            position: relative;
            width: 24px;
            height: 2px;
            background: var(--text-main);
            display: block;
            transition: var(--transition-base);
        }
        .navbar-custom .navbar-toggler-icon::before,
        .navbar-custom .navbar-toggler-icon::after {
            content: '';
            position: absolute;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--text-main);
            transition: var(--transition-base);
        }
        .navbar-custom .navbar-toggler-icon::before {
            top: -7px;
        }
        .navbar-custom .navbar-toggler-icon::after {
            top: 7px;
        }
        .navbar-custom .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-md);
            padding: 8px 20px;
            font-size: 15px;
            font-weight: 600;
            border: none;
            transition: var(--transition-base);
        }
        .navbar-custom .nav-cta:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
        }
        .navbar-custom .nav-cta i {
            font-size: 18px;
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            width: 100%;
            min-height: 80vh;
            min-height: 600px;
            display: flex;
            align-items: center;
            justify-content: center;
            background-image: linear-gradient(180deg, rgba(21,24,36,0.6) 0%, rgba(21,24,36,0.2) 100%), url('/assets/images/backpic/hero.jpg');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            color: var(--text-white);
            text-align: center;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(21,24,36,0.7) 0%, rgba(21,24,36,0.3) 50%, rgba(21,24,36,0.5) 100%);
            z-index: 1;
        }
        .hero-section .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            padding: 20px;
        }
        .hero-section .hero-title {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 1px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.3);
        }
        .hero-section .hero-subtitle {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 30px;
            line-height: 1.6;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-section .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .hero-section .btn-hero-primary {
            background: var(--primary);
            color: #fff;
            border: 2px solid var(--primary);
            padding: 12px 32px;
            border-radius: var(--radius-md);
            font-size: 17px;
            font-weight: 600;
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .hero-section .btn-hero-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(43,124,230,0.3);
        }
        .hero-section .btn-hero-outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.8);
            padding: 12px 32px;
            border-radius: var(--radius-md);
            font-size: 17px;
            font-weight: 600;
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .hero-section .btn-hero-outline:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }
        @media (max-width: 768px) {
            .hero-section {
                min-height: 70vh;
                min-height: 500px;
            }
            .hero-section .hero-title {
                font-size: 26px;
            }
            .hero-section .hero-subtitle {
                font-size: 16px;
            }
            .hero-section .btn-hero-primary,
            .hero-section .btn-hero-outline {
                padding: 10px 24px;
                font-size: 15px;
            }
        }
        @media (max-width: 576px) {
            .hero-section .hero-title {
                font-size: 22px;
            }
            .hero-section .hero-subtitle {
                font-size: 14px;
            }
            .hero-section .hero-buttons {
                flex-direction: column;
                align-items: center;
            }
        }

        /* ===== Scrollable Card Row ===== */
        .scroll-cards-wrapper {
            overflow: hidden;
            position: relative;
        }
        .scroll-cards-track {
            display: flex;
            gap: 20px;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
            padding-bottom: 8px;
            scrollbar-width: thin;
            scrollbar-color: var(--primary) transparent;
        }
        .scroll-cards-track::-webkit-scrollbar {
            height: 4px;
        }
        .scroll-cards-track::-webkit-scrollbar-track {
            background: transparent;
        }
        .scroll-cards-track::-webkit-scrollbar-thumb {
            background: var(--primary);
            border-radius: 4px;
        }
        .scroll-cards-track .scroll-card {
            flex: 0 0 280px;
            scroll-snap-align: start;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
            cursor: pointer;
        }
        .scroll-cards-track .scroll-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .scroll-cards-track .scroll-card .card-img-top {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
        }
        .scroll-cards-track .scroll-card .card-body {
            padding: 14px 16px 16px;
        }
        .scroll-cards-track .scroll-card .card-title {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 6px;
            line-height: 1.4;
            color: var(--text-main);
        }
        .scroll-cards-track .scroll-card .card-tag {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            font-size: 11px;
            font-weight: 600;
            padding: 2px 10px;
            border-radius: 20px;
            letter-spacing: 0.3px;
        }
        @media (max-width: 576px) {
            .scroll-cards-track .scroll-card {
                flex: 0 0 220px;
            }
        }

        /* ===== Card Grid ===== */
        .card-grid .card-item {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
            border: none;
            height: 100%;
        }
        .card-grid .card-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .card-grid .card-item .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
        }
        .card-grid .card-item .card-body {
            padding: 16px 18px 18px;
        }
        .card-grid .card-item .card-title {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .card-grid .card-item .card-desc {
            font-size: 14px;
            color: var(--text-secondary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 10px;
            line-height: 1.5;
        }
        .card-grid .card-item .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
        }
        .card-grid .card-item .card-meta .badge-tag {
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 500;
            padding: 2px 10px;
            border-radius: 20px;
        }
        .card-grid .card-item .card-meta .badge-tag.accent {
            background: rgba(255, 107, 53, 0.12);
            color: var(--accent);
        }
        .card-grid .card-item .btn-detail {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            padding: 0;
            border: none;
            background: none;
            transition: var(--transition-base);
        }
        .card-grid .card-item .btn-detail:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }

        /* ===== Tab Pills ===== */
        .tab-pills-custom {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 28px;
        }
        .tab-pills-custom .pill-item {
            padding: 8px 22px;
            border-radius: 30px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            cursor: pointer;
            transition: var(--transition-base);
            user-select: none;
        }
        .tab-pills-custom .pill-item:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .tab-pills-custom .pill-item.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .tab-content-custom .tab-panel {
            display: none;
        }
        .tab-content-custom .tab-panel.active {
            display: block;
        }

        /* ===== CTA Block ===== */
        .cta-block {
            background: linear-gradient(135deg, #2B7CE6 0%, #FF6B35 100%);
            padding: 80px 20px;
            text-align: center;
            color: #fff;
            border-radius: 0;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 30% 50%, rgba(255,255,255,0.08) 0%, transparent 60%);
            pointer-events: none;
        }
        .cta-block .cta-title {
            font-size: 32px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            position: relative;
        }
        .cta-block .cta-desc {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.9);
            max-width: 600px;
            margin: 0 auto 28px;
            position: relative;
        }
        .cta-block .btn-cta-primary {
            background: #fff;
            color: var(--primary);
            border: none;
            padding: 14px 36px;
            border-radius: var(--radius-md);
            font-size: 17px;
            font-weight: 700;
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            position: relative;
        }
        .cta-block .btn-cta-primary:hover {
            background: rgba(255, 255, 255, 0.9);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0,0,0,0.15);
        }
        @media (max-width: 768px) {
            .cta-block {
                padding: 50px 20px;
            }
            .cta-block .cta-title {
                font-size: 24px;
            }
            .cta-block .cta-desc {
                font-size: 16px;
            }
            .cta-block .btn-cta-primary {
                padding: 12px 28px;
                font-size: 15px;
            }
        }

        /* ===== News / CMS List ===== */
        .news-list .news-item {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 18px 22px;
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
            border: 1px solid var(--border-color);
        }
        .news-list .news-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .news-list .news-item .news-title {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 6px;
        }
        .news-list .news-item .news-title a {
            color: var(--text-main);
        }
        .news-list .news-item .news-title a:hover {
            color: var(--primary);
        }
        .news-list .news-item .news-summary {
            font-size: 14px;
            color: var(--text-secondary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 6px;
        }
        .news-list .news-item .news-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .news-list .news-item .news-meta .news-category {
            background: var(--primary-light);
            color: var(--primary);
            padding: 2px 12px;
            border-radius: 20px;
            font-weight: 500;
            font-size: 12px;
        }
        .news-list .news-item .news-meta time {
            font-size: 13px;
        }
        .news-empty {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-muted);
            font-size: 16px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px dashed var(--border-color);
        }

        /* ===== Footer ===== */
        .footer-custom {
            background: var(--bg-dark);
            color: var(--text-muted);
            padding: 50px 0 0;
        }
        .footer-custom .footer-brand {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }
        .footer-custom .footer-brand .brand-highlight {
            color: var(--primary);
        }
        .footer-custom .footer-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-custom .footer-heading {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-custom .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-custom .footer-links li {
            margin-bottom: 8px;
        }
        .footer-custom .footer-links a {
            color: var(--text-muted);
            font-size: 14px;
            transition: var(--transition-base);
        }
        .footer-custom .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-custom .footer-contact p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-custom .footer-contact i {
            color: var(--primary);
            font-size: 16px;
            width: 20px;
        }
        .footer-custom .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: var(--text-muted);
            font-size: 18px;
            transition: var(--transition-base);
            margin-right: 8px;
        }
        .footer-custom .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer-custom .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 18px 0;
            margin-top: 40px;
            text-align: center;
            font-size: 14px;
            color: var(--text-muted);
        }
        .footer-custom .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-custom .footer-bottom a:hover {
            color: #fff;
        }
        @media (max-width: 768px) {
            .footer-custom .footer-brand {
                text-align: center;
            }
            .footer-custom .footer-desc {
                text-align: center;
                margin: 0 auto 20px;
            }
            .footer-custom .footer-heading {
                text-align: center;
                margin-top: 20px;
            }
            .footer-custom .footer-links {
                text-align: center;
            }
            .footer-custom .footer-contact p {
                justify-content: center;
            }
            .footer-custom .footer-social {
                text-align: center;
            }
        }

        /* ===== Section Title ===== */
        .section-title-wrap {
            margin-bottom: 32px;
        }
        .section-title-wrap .section-title {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-main);
        }
        .section-title-wrap .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            margin: 0;
        }
        .section-title-wrap .section-link {
            font-size: 15px;
            font-weight: 600;
            color: var(--primary);
            white-space: nowrap;
        }
        .section-title-wrap .section-link:hover {
            color: var(--primary-dark);
        }
        @media (max-width: 576px) {
            .section-title-wrap .section-title {
                font-size: 22px;
            }
            .section-title-wrap .section-subtitle {
                font-size: 14px;
            }
        }

        /* ===== Utility ===== */
        .bg-white-custom {
            background: #fff;
        }
        .rounded-custom-lg {
            border-radius: var(--radius-lg);
        }
        .shadow-custom-card {
            box-shadow: var(--shadow-card);
        }
        .divider-custom {
            height: 1px;
            background: var(--border-color);
            margin: 0;
        }

        /* ===== Responsive Grid Overrides ===== */
        @media (max-width: 576px) {
            .card-grid .card-item .card-body {
                padding: 12px 14px 14px;
            }
            .card-grid .card-item .card-title {
                font-size: 15px;
            }
            .news-list .news-item {
                padding: 14px 16px;
            }
            .news-list .news-item .news-title {
                font-size: 15px;
            }
        }

        /* ===== Section Divider ===== */
        .section-divider {
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin-bottom: 16px;
        }

        /* ===== Preloader / Transitions ===== */
        .fade-in-section {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-in-section.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== Accessibility ===== */
        .skip-link {
            position: absolute;
            top: -100%;
            left: 8px;
            background: var(--primary);
            color: #fff;
            padding: 8px 16px;
            border-radius: var(--radius-md);
            z-index: 1100;
            transition: top 0.2s;
        }
        .skip-link:focus {
            top: 8px;
        }

        /* ===== Button base reset ===== */
        .btn {
            border-radius: var(--radius-md);
            font-weight: 600;
            transition: var(--transition-base);
        }
        .btn-primary-custom {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }
        .btn-primary-custom:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(43,124,230,0.25);
        }
        .btn-outline-primary-custom {
            border: 2px solid var(--primary);
            color: var(--primary);
            background: transparent;
        }
        .btn-outline-primary-custom:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-1px);
        }

        /* ===== Back to top ===== */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            border: none;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            box-shadow: 0 4px 15px rgba(43,124,230,0.3);
            opacity: 0;
            visibility: hidden;
            transition: var(--transition-base);
            z-index: 1040;
            cursor: pointer;
        }
        .back-to-top.show {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
        }

/* roulang page: article */
:root {
            --primary: #2B7CE6;
            --primary-dark: #1A5CB8;
            --primary-light: rgba(43,124,230,0.08);
            --accent: #FF6B35;
            --accent-dark: #e85a2a;
            --bg-body: #F5F8FC;
            --card-bg: #FFFFFF;
            --text-primary: #1A1A2E;
            --text-secondary: #5C6B7A;
            --text-muted: #A0AAB5;
            --border-color: #E9ECEF;
            --shadow-sm: 0 4px 14px rgba(43,124,230,0.08);
            --shadow-md: 0 6px 20px rgba(0,0,0,0.05);
            --shadow-lg: 0 12px 30px rgba(0,0,0,0.1);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-input: 6px;
            --font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --nav-glass: rgba(255,255,255,0.7);
            --footer-bg: #1A1A2E;
            --container-max: 1200px;
            --section-padding: 60px;
            --section-padding-mobile: 40px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background-color: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.6;
            margin: 0;
            padding: 0;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
        }
        .container-custom {
            max-width: var(--container-max);
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        @media (max-width: 576px) {
            .container-custom {
                padding-left: 15px;
                padding-right: 15px;
            }
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            margin-top: 0;
            line-height: 1.3;
            color: var(--text-primary);
        }
        h1 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
        }
        h2 {
            font-size: 24px;
            font-weight: 700;
            line-height: 1.4;
        }
        h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.4;
        }
        h4 {
            font-size: 18px;
            font-weight: 600;
        }
        .section-padding {
            padding-top: var(--section-padding);
            padding-bottom: var(--section-padding);
        }
        @media (max-width: 768px) {
            .section-padding {
                padding-top: var(--section-padding-mobile);
                padding-bottom: var(--section-padding-mobile);
            }
            h1 {
                font-size: 26px;
            }
            h2 {
                font-size: 20px;
            }
            h3 {
                font-size: 18px;
            }
        }

        /* ===== 导航 ===== */
        .navbar-custom {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: var(--nav-glass);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(43,124,230,0.15);
            padding: 10px 0;
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }
        .navbar-custom.scrolled {
            background: #ffffff;
            box-shadow: 0 2px 10px rgba(0,0,0,0.08);
        }
        .navbar-custom .navbar-brand {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 2px;
        }
        .navbar-custom .brand-highlight {
            color: var(--primary);
        }
        .navbar-custom .nav-link {
            font-size: 16px;
            color: var(--text-secondary);
            font-weight: 500;
            padding: 8px 16px;
            border-radius: var(--radius-btn);
            position: relative;
            transition: color 0.2s, background 0.2s;
        }
        .navbar-custom .nav-link:hover,
        .navbar-custom .nav-link:focus {
            color: var(--primary);
            background: var(--primary-light);
        }
        .navbar-custom .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .navbar-custom .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
        }
        .navbar-custom .navbar-toggler {
            border: none;
            padding: 6px 8px;
            color: var(--text-primary);
        }
        .navbar-custom .navbar-toggler:focus {
            box-shadow: none;
        }
        .navbar-custom .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='%231A1A2E' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E");
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary);
            color: #fff;
            padding: 8px 20px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            transition: background 0.25s, transform 0.2s;
        }
        .nav-cta:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
        }
        .nav-cta i {
            font-size: 16px;
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-wrapper {
            background: transparent;
            padding: 20px 0 0;
        }
        .breadcrumb-custom {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            color: var(--text-muted);
        }
        .breadcrumb-custom li+li::before {
            content: '>';
            margin-right: 6px;
            color: var(--text-muted);
        }
        .breadcrumb-custom a {
            color: var(--primary);
        }
        .breadcrumb-custom a:hover {
            color: var(--primary-dark);
        }
        .breadcrumb-custom li:last-child {
            color: var(--text-secondary);
            max-width: 240px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ===== 文章详情 ===== */
        .article-detail-wrapper {
            margin-top: 90px;
            padding-bottom: 60px;
        }
        .article-detail-container {
            max-width: 760px;
            margin-left: auto;
            margin-right: auto;
            background: var(--card-bg);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            padding: 40px 48px;
        }
        @media (max-width: 768px) {
            .article-detail-container {
                padding: 24px 20px;
                border-radius: 0;
                box-shadow: none;
                background: transparent;
            }
        }
        .article-header {
            margin-bottom: 28px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px 24px;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 12px;
        }
        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta i {
            font-size: 16px;
            color: var(--text-muted);
        }
        .article-title {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.35;
            margin: 8px 0 4px;
            color: var(--text-primary);
        }
        @media (max-width: 576px) {
            .article-title {
                font-size: 22px;
            }
        }
        .article-category-badge {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 8px;
        }
        .article-content {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-primary);
        }
        .article-content p {
            margin-bottom: 1.5em;
        }
        .article-content h2 {
            font-size: 22px;
            font-weight: 700;
            margin-top: 2em;
            margin-bottom: 0.8em;
            border-bottom: 2px solid var(--border-color);
            padding-bottom: 8px;
        }
        .article-content h3 {
            font-size: 19px;
            font-weight: 600;
            margin-top: 1.6em;
            margin-bottom: 0.6em;
        }
        .article-content h4 {
            font-size: 17px;
            font-weight: 600;
            margin-top: 1.2em;
            margin-bottom: 0.4em;
        }
        .article-content img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 24px 0;
        }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            padding: 12px 20px;
            margin: 24px 0;
            background: var(--primary-light);
            border-radius: 0 8px 8px 0;
            font-style: italic;
            color: var(--text-secondary);
        }
        .article-content ul,
        .article-content ol {
            padding-left: 24px;
            margin-bottom: 1.5em;
        }
        .article-content li {
            margin-bottom: 6px;
        }
        .article-content a {
            color: var(--primary);
            text-decoration: underline;
        }
        .article-content a:hover {
            color: var(--primary-dark);
        }
        .article-tags {
            margin-top: 32px;
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .article-tags .badge-tag {
            background: var(--bg-body);
            color: var(--text-secondary);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            transition: background 0.2s, color 0.2s;
        }
        .article-tags .badge-tag:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .article-nav {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 16px;
            margin-top: 32px;
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
        }
        .article-nav a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 15px;
            color: var(--primary);
            font-weight: 500;
            transition: color 0.2s;
        }
        .article-nav a:hover {
            color: var(--primary-dark);
        }
        .article-nav .nav-disabled {
            color: var(--text-muted);
            pointer-events: none;
        }
        .btn-back-list {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--bg-body);
            color: var(--text-secondary);
            padding: 8px 20px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 500;
            transition: background 0.2s, color 0.2s;
            border: 1px solid var(--border-color);
        }
        .btn-back-list:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: var(--primary);
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 48px 0 60px;
        }
        .related-section h2 {
            margin-bottom: 24px;
            font-size: 22px;
        }
        .related-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: transform 0.25s, box-shadow 0.25s;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .related-card .card-img-top {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
        }
        .related-card .card-body {
            padding: 16px 18px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .card-title {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 8px;
            color: var(--text-primary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-text {
            font-size: 14px;
            color: var(--text-secondary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
            flex: 1;
        }
        .related-card .card-meta {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        /* ===== 内容未找到 ===== */
        .not-found-box {
            text-align: center;
            padding: 60px 20px;
            max-width: 500px;
            margin: 40px auto;
            background: var(--card-bg);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
        }
        .not-found-box h2 {
            font-size: 24px;
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-secondary);
            margin-bottom: 20px;
        }

        /* ===== 页脚 ===== */
        .footer-custom {
            background: var(--footer-bg);
            color: #ccc;
            padding: 60px 0 30px;
        }
        .footer-custom .footer-brand {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-custom .brand-highlight {
            color: var(--primary);
        }
        .footer-custom .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: #A0AAB5;
            max-width: 340px;
        }
        .footer-custom .footer-heading {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            margin-top: 8px;
        }
        .footer-custom .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-custom .footer-links li {
            margin-bottom: 8px;
        }
        .footer-custom .footer-links a {
            color: #A0AAB5;
            font-size: 14px;
            transition: color 0.2s;
        }
        .footer-custom .footer-links a:hover {
            color: #fff;
        }
        .footer-custom .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer-custom .footer-social a {
            color: #A0AAB5;
            font-size: 22px;
            transition: color 0.2s, transform 0.2s;
            display: inline-block;
        }
        .footer-custom .footer-social a:hover {
            color: #fff;
            transform: scale(1.1);
        }
        .footer-custom .footer-contact p {
            font-size: 14px;
            color: #A0AAB5;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-custom .footer-contact i {
            width: 18px;
            font-size: 16px;
        }
        .footer-custom .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            margin-top: 40px;
            padding-top: 24px;
            text-align: center;
            font-size: 14px;
            color: #6c7a8a;
        }
        .footer-custom .footer-bottom a {
            color: #6c7a8a;
        }
        .footer-custom .footer-bottom a:hover {
            color: #fff;
        }

        /* ===== 通用按钮覆盖 ===== */
        .btn-custom-primary {
            background: var(--primary);
            color: #fff;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            border: none;
            transition: background 0.25s, transform 0.2s, box-shadow 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .btn-custom-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(43,124,230,0.3);
        }
        .btn-custom-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
            padding: 10px 26px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            transition: background 0.25s, color 0.25s, transform 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .btn-custom-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== 响应式补充 ===== */
        @media (max-width: 992px) {
            .navbar-custom .navbar-collapse {
                background: #fff;
                border-radius: 12px;
                padding: 16px 20px;
                box-shadow: 0 8px 24px rgba(0,0,0,0.08);
                margin-top: 10px;
            }
            .navbar-custom .nav-link.active::after {
                display: none;
            }
            .navbar-custom .nav-link {
                padding: 10px 12px;
            }
        }
        @media (max-width: 576px) {
            .article-detail-wrapper {
                margin-top: 76px;
            }
            .article-meta {
                gap: 8px 16px;
                font-size: 13px;
            }
            .article-content {
                font-size: 15px;
            }
            .related-card .card-img-top {
                aspect-ratio: 16/10;
            }
        }
        @media (min-width: 1200px) {
            .container-custom {
                padding-left: 0;
                padding-right: 0;
            }
        }

/* roulang page: category1 */
/* ===== CSS 设计变量 ===== */
        :root {
            --primary: #2B7CE6;
            --primary-dark: #1A5CB8;
            --primary-light: rgba(43, 124, 230, 0.08);
            --secondary: #FF6B35;
            --secondary-light: rgba(255, 107, 53, 0.12);
            --bg-body: #F5F8FC;
            --bg-card: #FFFFFF;
            --bg-dark: #1A1A2E;
            --text-primary: #1A1A2E;
            --text-secondary: #5C6B7A;
            --text-disabled: #A0AAB5;
            --text-white: #FFFFFF;
            --border-color: #E9ECEF;
            --border-light: rgba(43, 124, 230, 0.15);
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-sm: 0 4px 14px rgba(43, 124, 230, 0.08);
            --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.05);
            --shadow-lg: 0 12px 30px rgba(0, 0, 0, 0.1);
            --shadow-nav: 0 2px 10px rgba(0, 0, 0, 0.08);
            --font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --container-max: 1200px;
            --transition-base: 0.3s ease;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-primary);
            background-color: var(--bg-body);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-base);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul,
        ol {
            padding-left: 0;
            list-style: none;
            margin-bottom: 0;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            margin-top: 0;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
        }
        p {
            margin-top: 0;
            margin-bottom: 1rem;
            color: var(--text-secondary);
        }
        :focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* ===== 容器 ===== */
        .container-custom {
            max-width: var(--container-max);
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        @media (max-width: 576px) {
            .container-custom {
                padding-left: 15px;
                padding-right: 15px;
            }
        }

        /* ===== 导航 ===== */
        .navbar-custom {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.7);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            padding: 0;
            transition: background var(--transition-base), box-shadow var(--transition-base);
            min-height: 64px;
        }
        .navbar-custom.scrolled {
            background: rgba(255, 255, 255, 1);
            box-shadow: var(--shadow-nav);
        }
        .navbar-custom .navbar-brand {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            padding: 12px 0;
            letter-spacing: 0.5px;
        }
        .navbar-custom .navbar-brand .brand-highlight {
            color: var(--primary);
        }
        .navbar-custom .navbar-brand:hover {
            color: var(--text-primary);
        }
        .navbar-custom .navbar-nav .nav-link {
            font-size: 16px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            transition: color var(--transition-base), background var(--transition-base);
            position: relative;
        }
        .navbar-custom .navbar-nav .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .navbar-custom .navbar-nav .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .navbar-custom .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 16px;
            right: 16px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
        }
        .navbar-custom .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary);
            color: #fff;
            padding: 8px 20px;
            border-radius: var(--radius-md);
            font-size: 14px;
            font-weight: 600;
            transition: background var(--transition-base), transform var(--transition-base);
            border: none;
        }
        .navbar-custom .nav-cta:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
        }
        .navbar-custom .btn-link.nav-link {
            color: var(--text-secondary);
            padding: 8px 12px;
        }
        .navbar-custom .btn-link.nav-link:hover {
            color: var(--primary);
            background: transparent;
        }
        .navbar-toggler {
            border: none;
            padding: 4px 8px;
        }
        .navbar-toggler:focus {
            box-shadow: none;
        }
        .navbar-toggler .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='%232B7CE6' stroke-width='2.5' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E");
        }
        @media (max-width: 991.98px) {
            .navbar-custom .navbar-collapse {
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                border-radius: var(--radius-lg);
                padding: 12px 16px;
                margin-top: 8px;
                box-shadow: var(--shadow-md);
            }
            .navbar-custom .navbar-nav .nav-link {
                padding: 10px 12px;
            }
            .navbar-custom .navbar-nav .nav-link.active::after {
                display: none;
            }
            .navbar-custom .navbar-nav .nav-link.active {
                background: var(--primary-light);
                border-radius: var(--radius-sm);
            }
            .navbar-custom .d-flex.gap-2 {
                margin-top: 12px;
                padding-top: 12px;
                border-top: 1px solid var(--border-color);
                flex-wrap: wrap;
            }
        }

        /* ===== Hero 区（分类页半高） ===== */
        .hero-category {
            position: relative;
            height: 40vh;
            min-height: 360px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            margin-top: 64px;
            overflow: hidden;
        }
        .hero-category::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(21, 24, 36, 0.7) 0%, rgba(21, 24, 36, 0.3) 100%);
            z-index: 1;
        }
        .hero-category .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 20px;
            max-width: 800px;
        }
        .hero-category h1 {
            font-size: 42px;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: 2px;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .hero-category p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 0;
            line-height: 1.7;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
        }
        @media (max-width: 768px) {
            .hero-category {
                height: 36vh;
                min-height: 300px;
            }
            .hero-category h1 {
                font-size: 28px;
            }
            .hero-category p {
                font-size: 15px;
            }
        }
        @media (max-width: 576px) {
            .hero-category h1 {
                font-size: 24px;
            }
        }

        /* ===== 板块通用 ===== */
        .section-custom {
            padding: 60px 0;
        }
        .section-custom-sm {
            padding: 40px 0;
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 40px;
            max-width: 640px;
        }
        @media (max-width: 768px) {
            .section-custom {
                padding: 40px 0;
            }
            .section-title {
                font-size: 22px;
            }
            .section-subtitle {
                font-size: 15px;
                margin-bottom: 28px;
            }
        }

        /* ===== 介绍区 ===== */
        .intro-section .intro-img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            width: 100%;
            height: 320px;
            object-fit: cover;
        }
        .intro-section .intro-text h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .intro-section .intro-text p {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-secondary);
            margin-bottom: 16px;
        }
        @media (max-width: 768px) {
            .intro-section .intro-img {
                height: 220px;
                margin-bottom: 20px;
            }
            .intro-section .intro-text h3 {
                font-size: 19px;
            }
        }

        /* ===== 卡片 ===== */
        .card-custom {
            background: var(--bg-card);
            border: none;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            overflow: hidden;
            transition: transform var(--transition-base), box-shadow var(--transition-base);
            height: 100%;
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .card-custom .card-img-top {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .card-custom .card-body {
            padding: 20px;
        }
        .card-custom .card-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .card-custom .card-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .card-custom .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-disabled);
            margin-bottom: 12px;
        }
        .card-custom .card-meta i {
            margin-right: 4px;
        }
        .card-custom .badge-custom {
            display: inline-block;
            background: var(--secondary-light);
            color: var(--secondary);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 20px;
        }
        .card-custom .badge-primary {
            background: var(--primary-light);
            color: var(--primary);
        }
        .card-custom .card-footer-link {
            padding: 0 20px 16px;
        }
        .card-custom .card-footer-link .btn-sm-custom {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            padding: 6px 0;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition-base);
        }
        .card-custom .card-footer-link .btn-sm-custom:hover {
            gap: 10px;
            color: var(--primary-dark);
        }

        @media (max-width: 576px) {
            .card-custom .card-img-top {
                height: 150px;
            }
            .card-custom .card-body {
                padding: 16px;
            }
            .card-custom .card-title {
                font-size: 16px;
            }
        }

        /* ===== 按钮 ===== */
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 12px 28px;
            border-radius: var(--radius-md);
            font-size: 16px;
            font-weight: 600;
            border: none;
            transition: background var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
        }
        .btn-primary-custom:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(43, 124, 230, 0.25);
        }
        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--text-white);
            padding: 12px 28px;
            border-radius: var(--radius-md);
            font-size: 16px;
            font-weight: 600;
            border: 2px solid rgba(255, 255, 255, 0.7);
            transition: background var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
        }
        .btn-outline-custom:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-primary-custom:active,
        .btn-outline-custom:active {
            transform: translateY(0);
        }

        /* ===== FAQ 手风琴 ===== */
        .faq-section .accordion-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg) !important;
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--bg-card);
            box-shadow: var(--shadow-sm);
        }
        .faq-section .accordion-button {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            background: var(--bg-card);
            padding: 18px 24px;
            border: none;
            box-shadow: none;
            transition: color var(--transition-base);
        }
        .faq-section .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: var(--bg-card);
            box-shadow: none;
        }
        .faq-section .accordion-button::after {
            background-size: 18px;
            transition: transform var(--transition-base);
        }
        .faq-section .accordion-button:focus {
            box-shadow: none;
            border-color: var(--primary);
        }
        .faq-section .accordion-body {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== CTA 区 ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, #1A5CB8 100%);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }
        .cta-section h2 {
            font-size: 36px;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }
        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 32px;
            position: relative;
            z-index: 1;
        }
        .cta-section .btn-cta-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: var(--primary);
            padding: 14px 36px;
            border-radius: var(--radius-md);
            font-size: 17px;
            font-weight: 700;
            border: none;
            transition: transform var(--transition-base), box-shadow var(--transition-base);
            position: relative;
            z-index: 1;
        }
        .cta-section .btn-cta-white:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
            color: var(--primary-dark);
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 50px 0;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .cta-section p {
                font-size: 15px;
            }
            .cta-section .btn-cta-white {
                padding: 12px 28px;
                font-size: 15px;
            }
        }

        /* ===== 页脚 ===== */
        .footer-custom {
            background: var(--bg-dark);
            color: var(--text-disabled);
            padding: 60px 0 0;
        }
        .footer-custom .footer-brand {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .footer-custom .footer-brand .brand-highlight {
            color: var(--primary);
        }
        .footer-custom .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-disabled);
            margin-bottom: 16px;
            max-width: 360px;
        }
        .footer-custom .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-disabled);
            font-size: 18px;
            margin-right: 10px;
            transition: background var(--transition-base), color var(--transition-base);
        }
        .footer-custom .footer-social a:hover {
            background: var(--primary);
            color: #fff;
        }
        .footer-custom .footer-heading {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .footer-custom .footer-links li {
            margin-bottom: 10px;
        }
        .footer-custom .footer-links a {
            font-size: 14px;
            color: var(--text-disabled);
            transition: color var(--transition-base), padding-left var(--transition-base);
        }
        .footer-custom .footer-links a:hover {
            color: var(--text-white);
            padding-left: 4px;
        }
        .footer-custom .footer-contact p {
            font-size: 14px;
            color: var(--text-disabled);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-custom .footer-contact i {
            font-size: 16px;
            color: var(--primary);
            width: 20px;
            text-align: center;
        }
        .footer-custom .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 20px 0;
            margin-top: 40px;
            text-align: center;
            font-size: 13px;
            color: var(--text-disabled);
        }
        .footer-custom .footer-bottom a {
            color: var(--text-disabled);
            transition: color var(--transition-base);
        }
        .footer-custom .footer-bottom a:hover {
            color: var(--primary);
        }
        @media (max-width: 768px) {
            .footer-custom {
                padding: 40px 0 0;
            }
            .footer-custom .footer-desc {
                max-width: 100%;
            }
            .footer-custom .footer-bottom {
                margin-top: 24px;
            }
        }

        /* ===== 空态 ===== */
        .empty-state {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-disabled);
            font-size: 15px;
        }
        .empty-state i {
            font-size: 48px;
            color: var(--border-color);
            margin-bottom: 16px;
            display: block;
        }

        /* ===== 分隔线 ===== */
        .divider-custom {
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin-bottom: 20px;
        }

        /* ===== 辅助 ===== */
        .text-primary-custom {
            color: var(--primary);
        }
        .bg-light-custom {
            background: var(--bg-body);
        }
        .bg-white-custom {
            background: var(--bg-card);
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 576px) {
            .hero-category h1 {
                font-size: 22px;
            }
            .hero-category p {
                font-size: 14px;
            }
            .section-title {
                font-size: 20px;
            }
            .cta-section h2 {
                font-size: 22px;
            }
        }

        /* ===== 滚动导航背景切换 ===== */
        .navbar-custom.navbar-scrolled {
            background: rgba(255, 255, 255, 1) !important;
            box-shadow: var(--shadow-nav);
        }