/* roulang page: index */
:root {
            --primary: #0B7285;
            --primary-dark: #085A6B;
            --primary-light: rgba(11, 114, 133, 0.10);
            --accent: #E38C3F;
            --accent-light: rgba(227, 140, 63, 0.12);
            --bg: #F5F6F4;
            --dark: #16181D;
            --dark-soft: #1F232A;
            --text: #1F2937;
            --text-secondary: #4B5563;
            --text-tertiary: #6B7280;
            --text-muted: #9CA3AF;
            --border: #E5E7EB;
            --success: #16A34A;
            --warning: #D97706;
            --danger: #DC2626;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-pill: 999px;
            --shadow-card: 0 1px 2px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.06);
            --shadow-hover: 0 8px 24px rgba(0,0,0,0.10);
            --transition: all 0.25s ease;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-num: 'Inter', 'Roboto Mono', monospace;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        .container {
            max-width: 1280px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .text-muted {
            color: var(--text-tertiary) !important;
        }

        .btn {
            border-radius: var(--radius-btn);
            font-weight: 600;
            padding: 10px 24px;
            transition: var(--transition);
            font-size: 15px;
            line-height: 1.5;
            border: 1px solid transparent;
        }

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

        .btn-primary:hover {
            background-color: var(--accent);
            border-color: var(--accent);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(227, 140, 63, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(227, 140, 63, 0.25);
        }

        .btn-outline-light {
            border-color: rgba(255, 255, 255, 0.6);
            color: #fff;
            background: transparent;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }

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

        .btn-accent:hover {
            background-color: #f09a52;
            border-color: #f09a52;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(227, 140, 63, 0.4);
        }

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

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .section {
            padding: 96px 0;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
            text-align: center;
            margin-bottom: 48px;
            position: relative;
        }

        .section-title::after {
            content: '';
            display: block;
            width: 48px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), #4fb3c4);
            border-radius: 2px;
            margin: 16px auto 0;
        }

        /* ===== 倒计时条 ===== */
        .countdown-bar {
            background: var(--dark);
            color: #fff;
            padding: 10px 0;
            font-size: 14px;
            min-height: 44px;
            position: relative;
            z-index: 1000;
        }

        .countdown-bar .container {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            flex-wrap: nowrap;
        }

        .countdown-label {
            font-weight: 500;
            letter-spacing: 0.2px;
            white-space: nowrap;
        }

        .countdown-timer {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-family: var(--font-num);
        }

        .countdown-timer .num {
            font-size: 16px;
            font-weight: 700;
            color: var(--accent);
            background: rgba(255, 255, 255, 0.08);
            padding: 2px 7px;
            border-radius: 4px;
            min-width: 36px;
            text-align: center;
            display: inline-block;
        }

        .countdown-timer .unit {
            font-size: 12px;
            color: var(--text-muted);
            margin-right: 6px;
            letter-spacing: 0.4px;
        }

        .countdown-timer .unit:last-child {
            margin-right: 0;
        }

        @media (max-width: 576px) {
            .countdown-timer .unit {
                display: none;
            }

            .countdown-timer .num {
                font-size: 14px;
                min-width: 30px;
                padding: 2px 5px;
            }

            .countdown-label {
                font-size: 13px;
            }
        }

        /* ===== 导航 ===== */
        .site-header {
            background: var(--bg);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 999;
            min-height: 56px;
            transition: box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 56px;
        }

        .header-left {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .logo {
            font-size: 18px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .logo i {
            color: var(--primary);
            font-size: 20px;
        }

        .main-nav ul {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .main-nav ul li a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 2px;
            position: relative;
            display: inline-block;
        }

        .main-nav ul li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width 0.3s ease;
        }

        .main-nav ul li a:hover {
            color: var(--primary);
        }

        .main-nav ul li a:hover::after {
            width: 100%;
        }

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

        .main-nav ul li a.active::after {
            width: 100%;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .search-btn {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            color: var(--text-secondary);
            font-size: 15px;
            transition: var(--transition);
        }

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

        .header-cta {
            padding: 8px 22px;
            font-size: 14px;
        }

        .custom-toggler {
            display: none;
            width: 40px;
            height: 40px;
            background: transparent;
            border: none;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            cursor: pointer;
            border-radius: var(--radius-btn);
        }

        .custom-toggler span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: var(--transition);
        }

        .custom-toggler:hover span {
            background: var(--primary);
        }

        .mobile-nav {
            background: var(--bg);
            border-top: 1px solid var(--border);
            padding: 0;
        }

        .mobile-menu-list {
            list-style: none;
            padding: 8px 24px 16px;
            margin: 0;
        }

        .mobile-menu-list li a {
            display: block;
            padding: 14px 4px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            border-bottom: 1px solid var(--border);
        }

        .mobile-menu-list li a:last-child {
            border-bottom: none;
        }

        .mobile-menu-list li a.active {
            color: var(--primary);
        }

        .mobile-menu-list li a.mobile-cta {
            color: var(--primary);
            font-weight: 600;
        }

        @media (max-width: 768px) {
            .main-nav {
                display: none;
            }

            .custom-toggler {
                display: flex;
            }

            .header-cta {
                display: none;
            }

            .header-left {
                gap: 12px;
            }
        }

        /* ===== Hero ===== */
        .hero-section {
            padding: 80px 0 60px;
            position: relative;
            overflow: hidden;
            min-height: 520px;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -120px;
            width: 620px;
            height: 620px;
            background: radial-gradient(circle at center, rgba(11, 114, 133, 0.07) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero-grid {
            display: flex;
            align-items: center;
            gap: 48px;
        }

        .hero-content {
            flex: 0 0 55%;
            max-width: 55%;
        }

        .hero-title {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.2;
            color: var(--text);
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }

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

        .hero-subtitle {
            font-size: 17px;
            line-height: 1.75;
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 440px;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            gap: 20px;
            margin-bottom: 36px;
            flex-wrap: wrap;
        }

        .hero-trust {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 14px;
            color: var(--text-tertiary);
        }

        .hero-trust i {
            color: var(--accent);
            font-size: 18px;
        }

        .hero-visual {
            flex: 0 0 45%;
            max-width: 45%;
            position: relative;
        }

        .hero-visual .hero-img-wrap {
            position: relative;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            background: var(--dark);
            min-height: 360px;
        }

        .hero-visual img.hero-main-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 360px;
        }

        .hero-visual .hero-img-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(180deg, transparent 40%, rgba(0, 0, 0, 0.25) 100%);
        }

        .hero-deco-dots {
            position: absolute;
            bottom: -16px;
            left: -20px;
            width: 120px;
            height: 90px;
            background-image: radial-gradient(var(--primary) 1.5px, transparent 1.5px);
            background-size: 12px 12px;
            opacity: 0.35;
            pointer-events: none;
            z-index: 2;
        }

        .hero-deco-cloud {
            position: absolute;
            top: -32px;
            right: -24px;
            width: 180px;
            height: 90px;
            background: rgba(255, 255, 255, 0.12);
            border-radius: 60% 40% 50% 50%;
            filter: blur(2px);
            pointer-events: none;
            z-index: 2;
        }

        @media (max-width: 992px) {
            .hero-grid {
                flex-direction: column;
                gap: 32px;
            }

            .hero-content,
            .hero-visual {
                flex: 0 0 100%;
                max-width: 100%;
            }

            .hero-visual .hero-img-wrap {
                min-height: 0;
            }

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

        @media (max-width: 576px) {
            .hero-section {
                padding: 48px 0 32px;
            }

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

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

            .hero-visual {
                min-height: 260px;
                max-height: 320px;
            }

            .hero-visual img.hero-main-img {
                min-height: 260px;
            }
        }

        /* ===== 卖点区 ===== */
        .feature-section {
            background: #fff;
        }

        .feature-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            max-width: 1080px;
            margin: 0 auto;
        }

        .feature-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 28px;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .feature-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            border-color: rgba(11, 114, 133, 0.2);
        }

        .feature-card.large {
            padding: 36px;
        }

        .feature-card .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary);
            background: var(--primary-light);
            margin-bottom: 18px;
            transition: var(--transition);
        }

        .feature-card:hover .feature-icon {
            color: var(--accent);
            background: var(--accent-light);
            transform: scale(1.05);
        }

        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
        }

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

        .feature-card.small {
            padding: 22px;
        }

        .feature-card.small .feature-icon {
            width: 40px;
            height: 40px;
            font-size: 17px;
            margin-bottom: 12px;
        }

        .feature-card.small h3 {
            font-size: 16px;
        }

        .feature-row-2 {
            margin-top: 24px;
            display: grid;
            grid-template-columns: 0.85fr 1.15fr;
            gap: 24px;
        }

        @media (max-width: 768px) {
            .feature-grid,
            .feature-row-2 {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 576px) {
            .feature-card.large {
                padding: 24px;
            }
        }

        /* ===== 图墙 ===== */
        .gallery-section {
            background: var(--bg);
        }

        .gallery-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr;
            grid-template-rows: 1fr 1fr;
            gap: 20px;
            max-width: 1080px;
            margin: 0 auto;
        }

        .gallery-item {
            border-radius: 16px;
            overflow: hidden;
            position: relative;
            cursor: pointer;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }

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

        .gallery-item img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .gallery-item:hover img {
            transform: scale(1.03);
        }

        .gallery-item .gallery-caption {
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            padding: 60px 20px 16px;
            background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.35) 100%);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        .gallery-item.main {
            grid-row: span 2;
        }

        .gallery-item.main .gallery-caption {
            font-size: 17px;
            padding: 80px 24px 24px;
        }

        @media (max-width: 768px) {
            .gallery-grid {
                grid-template-columns: 1fr;
            }

            .gallery-item.main {
                grid-row: auto;
            }

            .gallery-item {
                min-height: 200px;
            }
        }

        /* ===== CTA 表单 ===== */
        .cta-section {
            background: var(--dark);
            color: #fff;
            padding: 72px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 50%;
            height: 100%;
            background: linear-gradient(135deg, transparent 0%, rgba(11, 114, 133, 0.08) 100%);
            pointer-events: none;
        }

        .cta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: start;
        }

        .cta-title {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 32px;
            color: #fff;
        }

        .cta-form .form-control {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            padding: 12px 16px;
            font-size: 15px;
            color: var(--text);
            margin-bottom: 16px;
            width: 100%;
            transition: var(--transition);
        }

        .cta-form .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 2px rgba(11, 114, 133, 0.2);
        }

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

        .cta-form textarea.form-control {
            min-height: 90px;
            resize: vertical;
        }

        .cta-form .btn-submit {
            background: var(--accent);
            color: #fff;
            border: none;
            padding: 12px 32px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            width: 100%;
            cursor: pointer;
            transition: var(--transition);
        }

        .cta-form .btn-submit:hover {
            background: #f09a52;
            box-shadow: 0 6px 18px rgba(227, 140, 63, 0.35);
            transform: translateY(-2px);
        }

        .cta-form .btn-submit:active {
            transform: translateY(0);
        }

        .cta-benefits {
            padding-top: 8px;
        }

        .cta-benefits .benefit-title {
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 24px;
        }

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

        .cta-benefits ul li {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.85);
            padding: 8px 0;
            display: flex;
            align-items: center;
            gap: 12px;
            line-height: 1.7;
        }

        .cta-benefits ul li i {
            color: var(--accent);
            font-size: 16px;
            flex-shrink: 0;
        }

        @media (max-width: 768px) {
            .cta-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .cta-title {
                font-size: 24px;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg);
        }

        .faq-wrapper {
            max-width: 860px;
            margin: 0 auto;
        }

        .accordion-item {
            background: var(--bg);
            border: 1px solid var(--border) !important;
            border-radius: var(--radius-card) !important;
            margin-bottom: 16px;
            overflow: hidden;
            box-shadow: none;
        }

        .accordion-button {
            background: var(--bg) !important;
            color: var(--text) !important;
            font-size: 16px;
            font-weight: 600;
            padding: 16px 20px;
            border: none;
            position: relative;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: none !important;
        }

        .accordion-button::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 0;
            background: var(--primary);
            border-radius: 0 3px 3px 0;
            transition: height 0.3s ease;
        }

        .accordion-button:not(.collapsed)::before {
            height: 60%;
        }

        .accordion-button:not(.collapsed) {
            color: var(--primary) !important;
        }

        .accordion-button::after {
            background-image: none !important;
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            content: '\f078';
            font-size: 14px;
            color: var(--text-tertiary);
            width: auto;
            height: auto;
            transition: transform 0.3s ease;
        }

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

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

        .accordion-body {
            padding: 16px 20px 20px;
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
            background: var(--bg);
            border-top: 1px solid var(--border);
        }

        @media (max-width: 576px) {
            .accordion-button {
                font-size: 15px;
                padding: 14px 16px;
            }
        }

        /* ===== 最新信息列表 ===== */
        .latest-section {
            background: #fff;
        }

        .news-list {
            max-width: 960px;
            margin: 0 auto;
        }

        .news-card {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 24px;
            margin-bottom: 16px;
            transition: var(--transition);
            box-shadow: var(--shadow-card);
        }

        .news-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            border-color: rgba(11, 114, 133, 0.15);
        }

        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
            width: 140px;
            flex-direction: column;
            align-items: flex-start;
        }

        .badge-cat {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            white-space: nowrap;
        }

        .news-meta time {
            font-size: 12px;
            color: var(--text-tertiary);
            font-family: var(--font-num);
        }

        .news-body {
            flex: 1;
        }

        .news-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
            line-height: 1.5;
        }

        .news-title a {
            color: inherit;
        }

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

        .news-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .news-link:hover {
            color: var(--accent);
        }

        .news-link i {
            font-size: 12px;
            transition: transform 0.2s ease;
        }

        .news-link:hover i {
            transform: translateX(3px);
        }

        .empty-state {
            border: 2px dashed var(--border);
            border-radius: var(--radius-card);
            background: var(--bg);
            padding: 48px;
            text-align: center;
            color: var(--text-tertiary);
            font-size: 15px;
        }

        @media (max-width: 576px) {
            .news-card {
                flex-direction: column;
                gap: 12px;
                padding: 18px;
            }

            .news-meta {
                width: 100%;
                flex-direction: row;
                align-items: center;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 64px 0 0;
        }

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

        .footer-brand .logo {
            color: #fff;
            margin-bottom: 12px;
        }

        .footer-brand .logo i {
            color: var(--accent);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 220px;
            margin-bottom: 16px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.8);
            font-size: 13px;
            transition: var(--transition);
        }

        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
        }

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

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

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

        .footer-links li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }

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

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

        .footer-contact li {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            display: flex;
            align-items: flex-start;
            gap: 10px;
            margin-bottom: 12px;
            line-height: 1.6;
        }

        .footer-contact li i {
            color: var(--accent);
            margin-top: 4px;
            font-size: 14px;
        }

        .footer-qr {
            text-align: center;
            padding: 16px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-card);
            background: rgba(255, 255, 255, 0.03);
        }

        .footer-qr .qr-icon {
            font-size: 64px;
            color: rgba(255, 255, 255, 0.4);
            margin-bottom: 8px;
        }

        .footer-qr span {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
            display: block;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            text-align: center;
            font-size: 12px;
            color: var(--text-muted);
        }

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

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

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

        @media (max-width: 576px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        /* ===== 通用响应式 ===== */
        @media (max-width: 800px) {
            .section {
                padding: 72px 0;
            }

            .section-title {
                font-size: 24px;
                margin-bottom: 36px;
            }
        }

        @media (max-width: 520px) {
            .section {
                padding: 48px 0;
            }

            .section-title {
                font-size: 20px;
                margin-bottom: 28px;
            }

            .logo {
                font-size: 16px;
            }
        }

        /* 装饰线 */
        .section-divider {
            border: none;
            height: 1px;
            background: var(--border);
            max-width: 1280px;
            margin: 0 auto;
        }

/* roulang page: category1 */
/* ========== 设计变量 ========== */
        :root {
            --primary: #0B7285;
            --primary-dark: #095E6D;
            --accent: #E38C3F;
            --accent-light: #F0A563;
            --bg: #F5F6F4;
            --dark: #16181D;
            --dark-2: #1F242B;
            --text-1: #1F2937;
            --text-2: #4B5563;
            --text-3: #6B7280;
            --text-4: #9CA3AF;
            --border: #E5E7EB;
            --success: #16A34A;
            --warning: #D97706;
            --error: #DC2626;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-pill: 999px;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04), 0 4px 12px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.14);
            --transition-base: all 0.25s ease;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-mono: 'Inter', 'Roboto Mono', monospace;
        }

        /* ========== Reset & Base ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-1);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        h1, h2, h3, h4, h5, h6 {
            margin: 0 0 0.5em 0;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-1);
        }
        p {
            margin: 0 0 1rem 0;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul {
            margin: 0;
            padding: 0;
            list-style: none;
        }
        .container {
            max-width: 1280px;
        }

        /* ========== 导航 ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--bg);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.03);
        }
        .site-header.scrolled {
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
        }
        .header-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 56px;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 800;
            color: var(--text-1);
            letter-spacing: 0.5px;
        }
        .logo i {
            color: var(--primary);
            font-size: 20px;
        }
        .logo:hover {
            color: var(--primary);
        }
        .main-nav ul {
            display: flex;
            gap: 32px;
        }
        .main-nav a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-2);
            padding: 6px 2px;
            position: relative;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition-base);
        }
        .main-nav .active a,
        .main-nav a:hover {
            color: var(--primary);
        }
        .main-nav .active a::after {
            width: 100%;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .btn-accent {
            background: var(--accent);
            border: none;
            color: #fff;
            border-radius: var(--radius-sm);
            padding: 8px 22px;
            font-size: 14px;
            font-weight: 600;
            transition: var(--transition-base);
        }
        .btn-accent:hover {
            background: var(--accent-light);
            color: #fff;
            box-shadow: 0 4px 14px rgba(227, 140, 63, 0.35);
            transform: translateY(-2px);
        }
        .btn-accent:active {
            transform: translateY(0);
        }
        .nav-toggle {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            background: transparent;
            color: var(--text-1);
            font-size: 18px;
            cursor: pointer;
            transition: var(--transition-base);
        }
        .nav-toggle:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .mobile-nav {
            background: var(--bg);
            border-top: 1px solid var(--border);
            padding: 12px 0 16px;
        }
        .mobile-nav ul {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-nav li a {
            display: block;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            color: var(--text-2);
        }
        .mobile-nav li.active a {
            color: var(--primary);
            background: rgba(11, 114, 133, 0.06);
            font-weight: 600;
        }

        /* ========== 通用板块 ========== */
        .section {
            padding: 96px 0;
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 16px;
            text-align: center;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-3);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }

        /* ========== 分类 Hero ========== */
        .category-hero {
            position: relative;
            padding: 72px 0 64px;
            background: var(--bg);
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(11, 114, 133, 0.06) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero-grid {
            display: flex;
            align-items: center;
            gap: 48px;
        }
        .hero-content {
            flex: 0 0 55%;
        }
        .hero-visual {
            flex: 0 0 45%;
            position: relative;
        }
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-3);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .breadcrumb-custom a {
            color: var(--text-3);
        }
        .breadcrumb-custom a:hover {
            color: var(--primary);
        }
        .breadcrumb-custom .sep {
            color: var(--text-4);
            font-size: 12px;
        }
        .breadcrumb-custom .current {
            color: var(--text-1);
            font-weight: 600;
        }
        .category-hero h1 {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            color: var(--text-1);
        }
        .category-hero h1 .highlight {
            color: var(--primary);
        }
        .hero-desc {
            font-size: 16px;
            color: var(--text-2);
            line-height: 1.8;
            max-width: 520px;
            margin-bottom: 32px;
        }
        .hero-btns {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn {
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            padding: 10px 26px;
            transition: var(--transition-base);
            border: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: 0 4px 16px rgba(11, 114, 133, 0.3);
            transform: translateY(-2px);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            border: 1.5px solid var(--border);
            color: var(--text-1);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(11, 114, 133, 0.03);
            transform: translateY(-2px);
        }
        .hero-visual img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            width: 100%;
            object-fit: cover;
        }
        .hero-visual::after {
            content: '';
            position: absolute;
            bottom: -18px;
            left: -18px;
            width: 80px;
            height: 80px;
            background-image: radial-gradient(var(--accent) 2px, transparent 2px);
            background-size: 12px 12px;
            opacity: 0.4;
            border-radius: 12px;
            z-index: -1;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(227, 140, 63, 0.12);
            color: var(--accent);
            border-radius: var(--radius-pill);
            padding: 4px 14px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 20px;
        }
        .hero-badge i {
            font-size: 12px;
        }

        /* ========== About 图文区 ========== */
        .guide-about {
            background: #fff;
            padding: 96px 0;
        }
        .about-grid {
            display: flex;
            align-items: center;
            gap: 64px;
        }
        .about-visual {
            flex: 0 0 46%;
        }
        .about-visual img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            width: 100%;
        }
        .about-content {
            flex: 0 0 54%;
        }
        .about-content .section-kicker {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(11, 114, 133, 0.08);
            padding: 4px 14px;
            border-radius: var(--radius-pill);
            margin-bottom: 16px;
        }
        .about-content h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 20px;
        }
        .about-content p {
            color: var(--text-2);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .about-list {
            margin-top: 24px;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .about-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
        }
        .about-list .icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(11, 114, 133, 0.08);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            flex-shrink: 0;
            margin-top: 4px;
        }
        .about-list .text b {
            color: var(--text-1);
            font-weight: 600;
        }
        .about-list .text span {
            color: var(--text-3);
            font-size: 14px;
        }

        /* ========== 核心领域卡片 ========== */
        .guide-subjects {
            padding: 96px 0;
            background: var(--bg);
        }
        .subject-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 28px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .subject-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: rgba(11, 114, 133, 0.2);
        }
        .subject-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: rgba(11, 114, 133, 0.08);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 20px;
            border: 1.5px solid rgba(11, 114, 133, 0.15);
        }
        .subject-card:hover .subject-icon {
            color: var(--accent);
            border-color: var(--accent);
        }
        .subject-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .subject-card p {
            font-size: 14px;
            color: var(--text-3);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .subject-card .card-tag {
            display: inline-block;
            font-size: 12px;
            color: var(--primary);
            background: rgba(11, 114, 133, 0.06);
            border-radius: var(--radius-pill);
            padding: 2px 10px;
            margin-top: 16px;
            align-self: flex-start;
        }
        .subjects-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr;
            gap: 24px;
        }
        .subjects-grid .subject-card:last-child {
            grid-column: span 1;
        }

        /* ========== 适用场景 ========== */
        .guide-scenes {
            background: var(--dark);
            padding: 96px 0;
            color: #fff;
        }
        .guide-scenes .section-title {
            color: #fff;
        }
        .guide-scenes .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }
        .scene-grid {
            display: flex;
            gap: 24px;
            margin-top: 48px;
        }
        .scene-item {
            flex: 1;
            background: var(--dark-2);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: var(--transition-base);
        }
        .scene-item:hover {
            border-color: var(--accent);
            transform: translateY(-2px);
        }
        .scene-item .num {
            font-family: var(--font-mono);
            font-size: 14px;
            color: var(--accent);
            font-weight: 700;
            letter-spacing: 1px;
            display: block;
            margin-bottom: 12px;
        }
        .scene-item i {
            font-size: 24px;
            color: var(--accent);
            margin-bottom: 16px;
            display: inline-block;
        }
        .scene-item h3 {
            font-size: 16px;
            color: #fff;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .scene-item p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ========== 内容特色 ========== */
        .guide-features {
            background: #fff;
            padding: 96px 0;
        }
        .feature-grid {
            display: flex;
            gap: 48px;
            align-items: center;
        }
        .feature-visual {
            flex: 0 0 45%;
        }
        .feature-visual img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            width: 100%;
        }
        .feature-list {
            flex: 0 0 55%;
        }
        .feature-list h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 24px;
        }
        .feature-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 18px 0;
            border-bottom: 1px solid var(--border);
        }
        .feature-item:last-child {
            border-bottom: none;
        }
        .feature-item .index {
            font-family: var(--font-mono);
            font-size: 13px;
            font-weight: 700;
            color: var(--accent);
            background: rgba(227, 140, 63, 0.08);
            border-radius: var(--radius-sm);
            padding: 4px 10px;
            flex-shrink: 0;
        }
        .feature-item h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .feature-item p {
            font-size: 14px;
            color: var(--text-3);
            margin-bottom: 0;
        }

        /* ========== 相关阅读 ========== */
        .guide-readmore {
            background: var(--bg);
            padding: 96px 0;
        }
        .read-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 24px;
            display: flex;
            gap: 16px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition-base);
            height: 100%;
        }
        .read-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .read-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: rgba(11, 114, 133, 0.08);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
            border: 1.5px solid rgba(11, 114, 133, 0.12);
        }
        .read-body h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 6px;
        }
        .read-body h3 a {
            color: var(--text-1);
        }
        .read-body h3 a:hover {
            color: var(--primary);
        }
        .read-body p {
            font-size: 14px;
            color: var(--text-3);
            margin-bottom: 0;
            line-height: 1.6;
        }
        .read-meta {
            font-size: 12px;
            color: var(--text-4);
            margin-top: 8px;
        }
        .read-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            max-width: 960px;
            margin: 0 auto;
        }

        /* ========== FAQ ========== */
        .guide-faq {
            background: #fff;
            padding: 96px 0;
        }
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }
        .accordion-item {
            background: var(--bg);
            border: 1px solid var(--border) !important;
            border-radius: var(--radius-md) !important;
            margin-bottom: 16px;
            overflow: hidden;
        }
        .accordion-button {
            background: transparent;
            color: var(--text-1);
            font-size: 16px;
            font-weight: 600;
            padding: 18px 22px;
            border: none;
            box-shadow: none;
            position: relative;
            transition: var(--transition-base);
        }
        .accordion-button::after {
            display: none;
        }
        .accordion-button:not(.collapsed) {
            background: rgba(11, 114, 133, 0.04);
            color: var(--primary);
            box-shadow: none;
        }
        .accordion-button:not(.collapsed)::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 22px;
            background: var(--primary);
            border-radius: 0 4px 4px 0;
        }
        .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--primary);
            outline-offset: -2px;
            border-radius: var(--radius-md);
        }
        .accordion-icon {
            margin-left: auto;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(11, 114, 133, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            color: var(--primary);
            transition: var(--transition-base);
            flex-shrink: 0;
            margin-top: -4px;
        }
        .accordion-button:not(.collapsed) .accordion-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(180deg);
        }
        .accordion-body {
            padding: 0 22px 18px;
            font-size: 14px;
            color: var(--text-3);
            line-height: 1.8;
            border-top: 1px solid var(--border);
            background: rgba(255, 255, 255, 0.6);
        }
        .accordion-body .faq-answer {
            padding-top: 16px;
        }

        /* ========== CTA 区 ========== */
        .guide-cta {
            background: var(--dark);
            padding: 80px 0;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .guide-cta::before {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -40px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(227, 140, 63, 0.15) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-grid {
            display: flex;
            gap: 64px;
            align-items: center;
        }
        .cta-text {
            flex: 0 0 55%;
        }
        .cta-text h2 {
            font-size: 28px;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-text p {
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 24px;
            max-width: 460px;
        }
        .cta-btns {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .cta-form {
            flex: 0 0 45%;
            background: var(--dark-2);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 32px;
        }
        .cta-form h3 {
            font-size: 18px;
            color: #fff;
            margin-bottom: 16px;
        }
        .form-control-modern {
            width: 100%;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 10px 16px;
            font-size: 14px;
            color: var(--text-1);
            background: #fff;
            margin-bottom: 12px;
            transition: var(--transition-base);
            outline: none;
        }
        .form-control-modern:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(11, 114, 133, 0.15);
        }
        .form-control-modern::placeholder {
            color: var(--text-4);
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.8);
            padding-top: 64px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
        }
        .footer-brand .logo {
            color: #fff;
            font-size: 20px;
            gap: 10px;
        }
        .footer-brand .logo i {
            color: var(--accent);
        }
        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 12px;
            line-height: 1.6;
        }
        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 16px;
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            transition: var(--transition-base);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: #fff;
        }
        .footer-title {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-links li,
        .footer-contact li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: var(--transition-base);
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-contact i {
            width: 16px;
            color: var(--accent);
            font-size: 13px;
        }
        .footer-qr {
            display: flex;
            align-items: center;
            gap: 12px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px dashed rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-sm);
            padding: 16px;
        }
        .qr-icon {
            font-size: 32px;
            color: var(--accent);
        }
        .footer-qr span {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.5;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 18px 0;
            font-size: 12px;
            color: var(--text-4);
        }
        .footer-bottom .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
        }

        /* ========== 焦点态 ========== */
        :focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1199.98px) {
            .container {
                max-width: 960px;
            }
            .hero-grid {
                gap: 32px;
            }
            .category-hero h1 {
                font-size: 36px;
            }
            .about-grid {
                gap: 40px;
            }
            .feature-grid {
                gap: 32px;
            }
        }
        @media (max-width: 991.98px) {
            .section {
                padding: 72px 0;
            }
            .main-nav {
                display: none;
            }
            .hero-grid {
                flex-direction: column;
            }
            .hero-content,
            .hero-visual {
                flex: 0 0 100%;
            }
            .hero-visual {
                margin-top: 16px;
            }
            .hero-visual img {
                max-height: 320px;
                object-fit: cover;
            }
            .about-grid {
                flex-direction: column-reverse;
            }
            .about-visual,
            .about-content {
                flex: 0 0 100%;
            }
            .feature-grid {
                flex-direction: column;
            }
            .feature-visual,
            .feature-list {
                flex: 0 0 100%;
            }
            .subjects-grid {
                grid-template-columns: 1fr 1fr;
            }
            .scene-grid {
                flex-direction: column;
            }
            .read-grid {
                grid-template-columns: 1fr;
            }
            .cta-grid {
                flex-direction: column;
                gap: 32px;
            }
            .cta-text,
            .cta-form {
                flex: 0 0 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 767.98px) {
            .section {
                padding: 48px 0;
            }
            .category-hero {
                padding: 40px 0;
            }
            .category-hero h1 {
                font-size: 28px;
            }
            .section-title {
                font-size: 24px;
            }
            .about-content h2,
            .feature-list h2,
            .cta-text h2 {
                font-size: 24px;
            }
            .subjects-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom .container {
                flex-direction: column;
                text-align: center;
            }
            .hero-btns {
                flex-direction: column;
                align-items: flex-start;
            }
            .hero-btns .btn {
                width: 100%;
                justify-content: center;
            }
            .read-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 575.98px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .hero-desc {
                font-size: 15px;
            }
            .btn {
                padding: 8px 18px;
                font-size: 14px;
            }
            .subject-card {
                padding: 20px;
            }
            .scene-item {
                padding: 20px;
            }
            .cta-form {
                padding: 20px;
            }
            .header-row {
                height: 52px;
            }
            .logo {
                font-size: 16px;
            }
            .btn-accent {
                padding: 6px 14px;
                font-size: 13px;
            }
        }

/* roulang page: article */
:root {
            --primary: #0B7285;
            --primary-dark: #085E6E;
            --primary-light: #E3F2F5;
            --accent: #E38C3F;
            --accent-dark: #C97A2E;
            --accent-light: #FDF3E8;
            --bg: #F5F6F4;
            --dark: #16181D;
            --text-1: #1F2937;
            --text-2: #4B5563;
            --text-3: #6B7280;
            --border: #E5E7EB;
            --white: #FFFFFF;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-tag: 999px;
            --shadow-card: 0 1px 2px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.06);
            --shadow-hover: 0 8px 24px rgba(0,0,0,0.10);
            --font-main: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-num: 'Inter', 'Roboto Mono', monospace;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-main);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-1);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        button {
            font-family: inherit;
            cursor: pointer;
        }

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

        :focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .container {
            max-width: 1280px;
            padding-left: 24px;
            padding-right: 24px;
            margin-left: auto;
            margin-right: auto;
            width: 100%;
        }

        /* ===== 导航 ===== */
        .site-header {
            background: var(--white);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            width: 100%;
            z-index: 1000;
            box-shadow: 0 1px 4px rgba(0,0,0,0.04);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 56px;
            gap: 24px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text-1);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }

        .logo i {
            color: var(--primary);
            font-size: 22px;
        }

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

        .main-nav {
            flex: 1;
            display: flex;
            justify-content: center;
        }

        .main-nav ul {
            display: flex;
            gap: 8px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .main-nav a {
            display: block;
            padding: 8px 18px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-2);
            border-radius: 6px;
            transition: all 0.2s ease;
        }

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

        .main-nav li.active a {
            color: var(--primary);
            font-weight: 600;
            background: transparent;
            position: relative;
        }

        .main-nav li.active a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 18px;
            right: 18px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            padding: 10px 22px;
            border: 1px solid transparent;
            transition: all 0.25s ease;
            line-height: 1.4;
        }

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

        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: 0 6px 16px rgba(11, 114, 133, 0.25);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-outline {
            border-color: var(--border);
            background: var(--white);
            color: var(--text-1);
        }

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

        .btn-sm {
            padding: 7px 16px;
            font-size: 14px;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border);
            border-radius: 8px;
            width: 40px;
            height: 40px;
            font-size: 18px;
            color: var(--text-1);
            align-items: center;
            justify-content: center;
            transition: all 0.2s ease;
        }

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

        /* ===== 面包屑 ===== */
        .breadcrumb-nav {
            background: var(--white);
            border-bottom: 1px solid var(--border);
            padding: 14px 0;
        }

        .breadcrumb-nav .container {
            display: flex;
            align-items: center;
        }

        .breadcrumb-nav ol {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            margin: 0;
            padding: 0;
            gap: 8px;
            font-size: 14px;
            color: var(--text-3);
        }

        .breadcrumb-nav li {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .breadcrumb-nav li + li::before {
            content: '/';
            color: var(--border);
            font-size: 13px;
        }

        .breadcrumb-nav a {
            color: var(--text-3);
            transition: color 0.2s ease;
        }

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

        .breadcrumb-nav li.active {
            color: var(--text-1);
            font-weight: 500;
            max-width: 260px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        /* ===== 文章主体 ===== */
        .article-main {
            padding: 48px 0 72px;
        }

        .article-layout {
            max-width: 860px;
            margin: 0 auto;
        }

        .article-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: 16px;
            box-shadow: var(--shadow-card);
            padding: 40px 48px;
        }

        .article-header {
            margin-bottom: 32px;
        }

        .article-category-badge {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 999px;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .article-title {
            font-size: 30px;
            font-weight: 800;
            line-height: 1.35;
            color: var(--text-1);
            margin: 0 0 20px;
            letter-spacing: -0.4px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 14px;
            color: var(--text-3);
            margin-bottom: 20px;
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta i {
            color: var(--primary);
            font-size: 14px;
        }

        .article-summary {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-2);
            background: var(--bg);
            border-left: 3px solid var(--primary);
            border-radius: 0 8px 8px 0;
            padding: 14px 20px;
            margin-bottom: 0;
        }

        .article-divider {
            height: 1px;
            background: var(--border);
            margin: 8px 0 32px;
        }

        /* ===== 正文排版 ===== */
        .article-body {
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-1);
        }

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

        .article-body h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-1);
            margin-top: 44px;
            margin-bottom: 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary-light);
            letter-spacing: -0.3px;
        }

        .article-body h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-1);
            margin-top: 32px;
            margin-bottom: 12px;
        }

        .article-body h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-1);
            margin-top: 24px;
            margin-bottom: 10px;
        }

        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
            text-decoration-color: rgba(11, 114, 133, 0.35);
        }

        .article-body a:hover {
            color: var(--accent);
            text-decoration-color: var(--accent);
        }

        .article-body img {
            border-radius: var(--radius-card);
            margin: 28px 0;
            width: 100%;
        }

        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            border-radius: 0 10px 10px 0;
            padding: 18px 24px;
            margin: 28px 0;
            color: var(--text-2);
            font-style: normal;
        }

        .article-body blockquote p:last-child {
            margin-bottom: 0;
        }

        .article-body ul,
        .article-body ol {
            padding-left: 1.6rem;
            margin-bottom: 24px;
        }

        .article-body li {
            margin-bottom: 8px;
        }

        .article-body li::marker {
            color: var(--primary);
        }

        .article-body table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            margin: 28px 0;
            border-radius: 10px;
            overflow: hidden;
            border: 1px solid var(--border);
        }

        .article-body th {
            background: var(--primary-light);
            font-weight: 700;
            color: var(--text-1);
            text-align: left;
            padding: 12px 16px;
            border-bottom: 1px solid var(--border);
        }

        .article-body td {
            padding: 12px 16px;
            border-bottom: 1px solid var(--border);
            color: var(--text-2);
        }

        .article-body tr:last-child td {
            border-bottom: none;
        }

        .article-body code {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 6px;
            padding: 2px 8px;
            font-size: 14px;
            font-family: 'Roboto Mono', monospace;
            color: var(--primary-dark);
        }

        /* ===== 标签/分享 ===== */
        .article-share {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 24px 0 0;
            margin-top: 40px;
            border-top: 1px solid var(--border);
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 500;
            color: var(--text-2);
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 4px 14px;
            transition: all 0.2s ease;
        }

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

        .share-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-3);
        }

        .share-actions a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg);
            border: 1px solid var(--border);
            color: var(--text-2);
            font-size: 15px;
            transition: all 0.2s ease;
        }

        .share-actions a:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(11, 114, 133, 0.2);
        }

        /* ===== 返回入口 ===== */
        .article-back {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 40px;
        }

        /* ===== 相关阅读 ===== */
        .related-section {
            background: var(--bg);
            padding: 72px 0;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-1);
            margin-bottom: 32px;
            position: relative;
            padding-left: 18px;
            letter-spacing: -0.3px;
        }

        .section-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 26px;
            background: var(--primary);
            border-radius: 4px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .related-card {
            display: flex;
            gap: 16px;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 16px;
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
        }

        .related-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(11, 114, 133, 0.3);
            transform: translateY(-3px);
        }

        .related-thumb {
            flex-shrink: 0;
            width: 110px;
            height: 82px;
            border-radius: 8px;
            overflow: hidden;
            background: var(--primary-light);
        }

        .related-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

        .related-card:hover .related-thumb img {
            transform: scale(1.06);
        }

        .related-info {
            flex: 1;
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .related-info h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-1);
            margin: 0 0 6px;
            line-height: 1.4;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .related-info p {
            font-size: 13px;
            color: var(--text-3);
            line-height: 1.6;
            margin: 0 0 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }

        .related-meta {
            font-size: 12px;
            color: var(--text-3);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .related-meta i {
            color: var(--primary);
        }

        /* ===== 未找到 ===== */
        .not-found-box {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: 16px;
            box-shadow: var(--shadow-card);
            padding: 72px 48px;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }

        .not-found-box .icon-wrap {
            width: 72px;
            height: 72px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 30px;
            margin-bottom: 20px;
        }

        .not-found-box h1 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-1);
            margin-bottom: 12px;
        }

        .not-found-box p {
            color: var(--text-2);
            margin-bottom: 24px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--dark);
            color: #C7CCD1;
            padding-top: 64px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.2fr 1fr;
            gap: 40px;
            padding-bottom: 48px;
        }

        .footer-brand .logo {
            color: #fff;
            font-size: 22px;
            margin-bottom: 14px;
        }

        .footer-brand .logo i {
            color: var(--accent);
        }

        .footer-brand p {
            font-size: 14px;
            color: #9CA3AF;
            margin: 0 0 20px;
            line-height: 1.7;
            max-width: 240px;
        }

        .footer-social {
            display: flex;
            gap: 10px;
        }

        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            color: #C7CCD1;
            font-size: 15px;
            transition: all 0.2s ease;
        }

        .footer-social a:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-2px);
        }

        .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
        }

        .footer-links,
        .footer-contact {
            list-style: none;
            margin: 0;
            padding: 0;
            font-size: 14px;
        }

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

        .footer-links a {
            color: #9CA3AF;
            transition: color 0.2s ease;
        }

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

        .footer-contact li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            margin-bottom: 12px;
            color: #9CA3AF;
            line-height: 1.6;
        }

        .footer-contact i {
            color: var(--accent);
            font-size: 14px;
            margin-top: 4px;
            flex-shrink: 0;
        }

        .footer-qr {
            display: flex;
            align-items: center;
            gap: 14px;
            background: rgba(255,255,255,0.06);
            border-radius: 12px;
            padding: 16px;
        }

        .qr-icon {
            font-size: 40px;
            color: var(--accent);
        }

        .footer-qr span {
            font-size: 13px;
            color: #9CA3AF;
            line-height: 1.5;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 20px 0;
            text-align: center;
            font-size: 12px;
            color: #6B7280;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991.98px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }

            .article-card {
                padding: 32px 28px;
            }
        }

        @media (max-width: 767.98px) {
            .nav-toggle {
                display: inline-flex;
            }

            .main-nav {
                position: fixed;
                top: 56px;
                left: 12px;
                right: 12px;
                background: var(--white);
                border: 1px solid var(--border);
                border-radius: 12px;
                box-shadow: 0 12px 32px rgba(0,0,0,0.12);
                display: none;
                padding: 12px;
                z-index: 999;
            }

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

            .main-nav ul {
                flex-direction: column;
                gap: 4px;
            }

            .main-nav a {
                padding: 12px 16px;
                font-size: 15px;
                border-radius: 8px;
                display: flex;
                align-items: center;
                min-height: 44px;
            }

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

            .main-nav li.active a {
                background: var(--primary-light);
                color: var(--primary);
                font-weight: 600;
            }

            .article-title {
                font-size: 23px;
            }

            .article-card {
                padding: 24px 20px;
                border-radius: 12px;
            }

            .article-main {
                padding: 32px 0 48px;
            }

            .article-share {
                flex-direction: column;
                align-items: flex-start;
                gap: 14px;
            }

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

            .section-title {
                font-size: 22px;
                margin-bottom: 24px;
            }

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

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

            .breadcrumb-nav li.active {
                max-width: 160px;
            }

            .article-meta {
                gap: 12px;
            }

            .not-found-box {
                padding: 48px 24px;
            }
        }

        @media (max-width: 575.98px) {
            .header-inner {
                gap: 12px;
                padding-left: 16px;
                padding-right: 16px;
            }

            .logo {
                font-size: 18px;
            }

            .logo i {
                font-size: 18px;
            }

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

            .article-body {
                font-size: 15px;
            }

            .article-body h2 {
                font-size: 20px;
            }

            .article-body h3 {
                font-size: 18px;
            }

            .related-thumb {
                width: 96px;
                height: 76px;
            }

            .article-back {
                flex-direction: column;
            }

            .article-back .btn {
                width: 100%;
            }

            .breadcrumb-nav {
                padding: 10px 0;
            }

            .breadcrumb-nav ol {
                font-size: 13px;
                gap: 6px;
            }
        }