/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2C6FBA;
            --primary-dark: #1C4F85;
            --primary-light: #EAF1F9;
            --accent: #D97736;
            --bg: #FFFFFF;
            --bg-light: #F5F7FA;
            --text: #1F2937;
            --text-secondary: #64748B;
            --border: #E2E8F0;
            --radius: 14px;
            --radius-sm: 8px;
            --shadow: 0 2px 10px rgba(0, 20, 50, 0.06);
            --shadow-hover: 0 8px 24px rgba(0, 20, 50, 0.10);
            --transition: all 0.3s ease;
            --nav-bg: rgba(255, 255, 255, 0.88);
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            color: var(--text);
            background: var(--bg);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-family: "Noto Serif SC", "Songti SC", "SimSun", serif;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul, ol {
            list-style: none;
        }
        button, input, textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        input, textarea {
            width: 100%;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            transition: var(--transition);
            color: var(--text);
        }
        input::placeholder,
        textarea::placeholder {
            color: #94A3B8;
        }
        input:focus,
        textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(44, 111, 186, 0.2);
        }
        .grid-container {
            max-width: 1200px;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-block;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 15px;
            line-height: 1.5;
            text-align: center;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(44, 111, 186, 0.25);
        }
        .btn-primary:focus {
            box-shadow: 0 0 0 3px rgba(44, 111, 186, 0.2);
        }
        .btn-primary:active {
            transform: translateY(1px);
        }
        .btn-link {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-link:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
        }

        /* ===== 徽章/标签 ===== */
        .badge {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            line-height: 1.5;
        }
        .badge-accent {
            background: rgba(217, 119, 54, 0.12);
            color: var(--accent);
        }

        /* ===== 悬浮胶囊导航 ===== */
        .site-header {
            position: sticky;
            top: 16px;
            z-index: 100;
            max-width: 1160px;
            width: calc(100% - 32px);
            margin: 16px auto 0;
            background: var(--nav-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-radius: 999px;
            padding: 10px 28px;
            box-shadow: 0 4px 20px rgba(0, 20, 50, 0.08);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            transition: box-shadow 0.3s ease;
        }
        .site-header:hover {
            box-shadow: 0 6px 28px rgba(0, 20, 50, 0.10);
        }
        .logo {
            font-family: "Noto Serif SC", "Songti SC", serif;
            font-size: 24px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
            line-height: 1.2;
        }
        .logo i {
            color: var(--primary);
            font-size: 20px;
        }
        .logo:hover {
            color: var(--primary);
        }
        .main-nav ul {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0;
            padding: 0;
        }
        .main-nav a {
            display: block;
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 15px;
            color: var(--text);
            font-weight: 500;
        }
        .main-nav a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .main-nav a.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--primary-light);
            position: relative;
        }
        .main-nav a.active::after {
            content: "";
            display: block;
            width: 6px;
            height: 6px;
            background: var(--primary);
            border-radius: 50%;
            margin: 2px auto 0;
        }
        .header-cta {
            padding: 8px 20px;
            font-size: 14px;
            flex-shrink: 0;
        }
        .hamburger {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary-light);
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            cursor: pointer;
            transition: var(--transition);
        }
        .hamburger:hover {
            background: rgba(44, 111, 186, 0.2);
        }
        .hamburger span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }

        /* ===== Hero ===== */
        .hero {
            background: linear-gradient(180deg, #F8FAFC 0%, #FFFFFF 100%);
            padding: 68px 0 56px;
            border-bottom: 1px solid var(--border);
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-weight: 700;
            font-size: 14px;
            letter-spacing: 2px;
            margin-bottom: 16px;
        }
        .hero-tag::before {
            content: "";
            display: block;
            width: 18px;
            height: 2px;
            background: var(--primary);
        }
        .hero h1 {
            font-size: 36px;
            line-height: 1.3;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
            max-width: 560px;
        }
        .hero-sub {
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-secondary);
            max-width: 560px;
            margin-bottom: 28px;
        }
        .hero-buttons {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 28px;
            flex-wrap: wrap;
        }
        .hero-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-secondary);
            flex-wrap: wrap;
        }
        .hero-meta .dot {
            width: 3px;
            height: 3px;
            background: #CBD5E1;
            border-radius: 50%;
        }
        .hero-image {
            position: relative;
            border-radius: var(--radius);
            background: var(--bg-light);
            border: 1px solid var(--border);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            min-height: 300px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .hero-image:hover {
            box-shadow: var(--shadow-hover);
            transform: scale(1.01);
        }
        .hero-image svg {
            width: 100%;
            height: auto;
        }
        .hero-caption {
            position: absolute;
            bottom: 14px;
            left: 16px;
            font-size: 13px;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.82);
            padding: 4px 12px;
            border-radius: 999px;
            backdrop-filter: blur(6px);
        }

        /* ===== 快讯条 ===== */
        .ticker-bar {
            margin-top: 32px;
            padding: 12px 0;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            font-size: 14px;
            color: var(--text-secondary);
            overflow: hidden;
            white-space: nowrap;
        }
        .ticker-bar .ticker-inner {
            display: inline-block;
            animation: ticker 30s linear infinite;
        }
        .ticker-bar span {
            margin: 0 24px;
        }
        .ticker-bar .ticker-dot {
            color: var(--accent);
        }
        @keyframes ticker {
            0% {
                transform: translateX(0);
            }
            100% {
                transform: translateX(-50%);
            }
        }

        /* ===== 板块通用 ===== */
        .section-padding {
            padding: 80px 0;
        }
        .section-head {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-head h2 {
            font-size: 30px;
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }
        .section-head p {
            color: var(--text-secondary);
            font-size: 15px;
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .section-head h2::after {
            content: "";
            display: block;
            width: 36px;
            height: 3px;
            background: var(--accent);
            border-radius: 3px;
            margin: 12px auto 0;
        }

        /* ===== 服务区 ===== */
        .services {
            padding: 80px 0;
        }
        .service-card {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 36px 32px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
            position: relative;
            overflow: hidden;
        }
        .service-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            border-color: rgba(44, 111, 186, 0.3);
        }
        .service-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--primary);
            opacity: 0;
            transition: var(--transition);
        }
        .service-card:hover::before {
            opacity: 1;
        }
        .service-icon {
            width: 56px;
            height: 56px;
            background: var(--primary-light);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary);
            margin-bottom: 20px;
        }
        .service-card h3 {
            font-size: 19px;
            margin-bottom: 10px;
        }
        .service-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
            flex-grow: 1;
        }
        .service-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .service-link:hover {
            text-decoration: underline;
            gap: 8px;
        }

        /* ===== 优势数据 ===== */
        .stats {
            background: var(--bg-light);
            padding: 64px 0;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .stat-item {
            text-align: center;
            padding: 24px 16px;
            position: relative;
        }
        .stat-item + .stat-item::before {
            content: "";
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 1px;
            height: 56px;
            background: var(--border);
        }
        .stat-number {
            font-family: "Noto Serif SC", serif;
            font-size: 38px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-number .unit {
            font-size: 18px;
            color: var(--accent);
            margin-left: 2px;
        }
        .stat-label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        /* ===== 案例区 ===== */
        .features {
            padding: 80px 0;
        }
        .feature-main {
            background: var(--bg);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .feature-main:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .feature-thumb {
            height: 220px;
            background: linear-gradient(135deg, var(--primary-light) 0%, #DCE8F5 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 48px;
            color: var(--primary);
        }
        .feature-body {
            padding: 28px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        .feature-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 12px;
            flex-wrap: wrap;
        }
        .feature-main h3 {
            font-size: 21px;
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .feature-main p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex-grow: 1;
        }
        .feature-side {
            display: flex;
            flex-direction: column;
            gap: 16px;
            height: 100%;
        }
        .feature-small {
            background: var(--bg);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            padding: 22px 24px;
            flex: 1;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .feature-small:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .feature-small .feature-meta {
            margin-bottom: 8px;
        }
        .feature-small h3 {
            font-size: 17px;
            line-height: 1.4;
            margin-bottom: 8px;
        }
        .feature-small p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            flex-grow: 1;
        }

        /* ===== 标签云 ===== */
        .tag-cloud {
            margin-top: 48px;
            text-align: center;
        }
        .tag-cloud .tag-title {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 16px;
            font-weight: 600;
        }
        .tag-cloud a {
            display: inline-block;
            padding: 6px 16px;
            margin: 0 6px 10px;
            background: var(--bg-light);
            border: 1px solid var(--border);
            border-radius: 999px;
            font-size: 13px;
            color: var(--text);
            transition: var(--transition);
        }
        .tag-cloud a:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }

        /* ===== 方案区 ===== */
        .methods {
            background: var(--bg-light);
            padding: 80px 0;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .methods-left .section-head {
            text-align: left;
            margin-bottom: 36px;
        }
        .methods-left .section-head h2::after {
            margin: 12px 0 0;
        }
        .methods-left .section-head p {
            margin: 0;
        }
        .method-item {
            display: flex;
            gap: 24px;
            padding: 28px 0;
            border-bottom: 1px solid var(--border);
            position: relative;
        }
        .method-item:last-child {
            border-bottom: none;
        }
        .method-num {
            font-family: "Noto Serif SC", serif;
            font-size: 44px;
            font-weight: 800;
            color: var(--primary-light);
            line-height: 1;
            min-width: 64px;
        }
        .method-item h3 {
            font-size: 19px;
            margin-bottom: 6px;
        }
        .method-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .method-quote {
            background: #fff;
            border-left: 4px solid var(--primary);
            border-radius: 0 var(--radius) var(--radius) 0;
            padding: 40px 36px;
            box-shadow: var(--shadow);
            margin: 0;
            position: relative;
        }
        .method-quote blockquote {
            border: none;
            padding: 0;
            margin: 0;
            font-size: 18px;
            line-height: 1.8;
            color: var(--text);
            font-family: "Noto Serif SC", "Songti SC", serif;
        }
        .method-quote .quote-source {
            margin-top: 20px;
            font-size: 14px;
            color: var(--text-secondary);
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 80px 0;
        }
        .faq-list {
            max-width: 840px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border);
        }
        .faq-item:first-child {
            border-top: 1px solid var(--border);
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 22px 0;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            transition: var(--transition);
            background: transparent;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            flex-shrink: 0;
            transition: var(--transition);
        }
        .faq-item.active .faq-question {
            color: var(--primary);
        }
        .faq-item.active .faq-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(45deg);
        }
        .faq-answer {
            display: none;
            padding: 0 40px 24px 0;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        .faq-item.active {
            border-left: 3px solid var(--primary);
            padding-left: 20px;
            margin-left: -20px;
        }

        /* ===== 联系区 ===== */
        .contact {
            background: var(--bg-light);
            padding: 80px 0;
            border-top: 1px solid var(--border);
        }
        .contact-cta {
            background: var(--primary-light);
            border-radius: var(--radius);
            padding: 48px 40px;
            text-align: center;
            margin-bottom: 40px;
            border: 1px solid rgba(44, 111, 186, 0.12);
        }
        .contact-cta h2 {
            font-size: 26px;
            margin-bottom: 12px;
        }
        .contact-cta p {
            color: var(--text-secondary);
            font-size: 15px;
            max-width: 520px;
            margin: 0 auto 24px;
        }
        .contact-form {
            background: #fff;
            border-radius: var(--radius);
            padding: 36px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .contact-form .btn {
            width: 100%;
        }
        .contact-form label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
            display: block;
        }
        .contact-form textarea {
            min-height: 100px;
            resize: vertical;
            margin-top: 20px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-light);
            border-top: 1px solid var(--border);
            padding: 40px 0 28px;
        }
        .footer-brand {
            font-family: "Noto Serif SC", serif;
            font-size: 24px;
            font-weight: 700;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-brand i {
            color: var(--primary);
            font-size: 20px;
        }
        .footer-desc {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 8px;
            line-height: 1.6;
        }
        .footer-links {
            display: flex;
            gap: 24px;
            justify-content: flex-end;
            align-items: center;
            height: 100%;
        }
        .footer-links a {
            font-size: 14px;
            color: var(--text-secondary);
        }
        .footer-links a:hover {
            color: var(--primary);
        }
        .footer-copyright {
            text-align: center;
            font-size: 13px;
            color: var(--text-secondary);
            padding-top: 28px;
            margin-top: 28px;
            border-top: 1px solid var(--border);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .hero {
                padding: 48px 0 40px;
            }
            .hero h1 {
                font-size: 32px;
            }
            .section-padding,
            .services,
            .features,
            .faq-section,
            .contact {
                padding: 56px 0;
            }
            .stats {
                padding: 48px 0;
            }
            .methods {
                padding: 56px 0;
            }
            .stat-number {
                font-size: 32px;
            }
            .stat-number .unit {
                font-size: 16px;
            }
        }
        @media (max-width: 768px) {
            .site-header {
                border-radius: 24px;
                padding: 10px 16px;
                top: 12px;
                width: calc(100% - 24px);
                margin-top: 12px;
                flex-wrap: wrap;
            }
            .hamburger {
                display: flex;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: calc(100% + 12px);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                border-radius: 20px;
                padding: 16px;
                box-shadow: var(--shadow-hover);
                backdrop-filter: blur(12px);
            }
            .main-nav.open {
                display: block;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 8px;
            }
            .main-nav a {
                padding: 12px 20px;
                width: 100%;
                text-align: center;
            }
            .header-cta {
                display: none;
            }
            .hero {
                padding: 36px 0 32px;
            }
            .hero h1 {
                font-size: 28px;
            }
            .hero-sub {
                font-size: 15px;
            }
            .hero-image {
                margin-top: 28px;
                min-height: 220px;
            }
            .stat-item + .stat-item::before {
                display: none;
            }
            .stat-item {
                padding: 16px;
            }
            .footer-links {
                justify-content: flex-start;
                margin-top: 20px;
            }
            .contact-form {
                padding: 24px;
            }
            .contact-cta {
                padding: 32px 24px;
            }
            .feature-side {
                margin-top: 0;
            }
        }
        @media (max-width: 520px) {
            .hero h1 {
                font-size: 24px;
            }
            .hero-buttons {
                flex-direction: column;
                align-items: stretch;
                gap: 12px;
            }
            .hero-buttons .btn {
                width: 100%;
            }
            .section-head h2 {
                font-size: 24px;
            }
            .method-item {
                gap: 16px;
            }
            .method-num {
                font-size: 34px;
                min-width: 44px;
            }
            .method-quote {
                padding: 28px 20px;
            }
            .method-quote blockquote {
                font-size: 16px;
            }
            .faq-answer {
                padding-right: 0;
            }
            .contact-form .btn {
                margin-top: 12px;
            }
            .footer-links {
                flex-wrap: wrap;
                gap: 12px;
            }
            .logo {
                font-size: 20px;
            }
            .logo i {
                font-size: 17px;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2C6FBA;
            --primary-dark: #1C4F85;
            --primary-light: #EAF1F9;
            --accent: #D97736;
            --bg: #FFFFFF;
            --bg-light: #F5F7FA;
            --text: #1F2937;
            --text-secondary: #64748B;
            --border: #E2E8F0;
            --radius: 14px;
            --radius-sm: 8px;
            --shadow: 0 2px 10px rgba(0, 20, 50, 0.06);
            --shadow-hover: 0 8px 24px rgba(0, 20, 50, 0.10);
            --transition: all 0.3s ease;
            --nav-bg: rgba(255, 255, 255, 0.88);
        }

        /* ===== Reset / 基础 ===== */
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            color: var(--text);
            background: var(--bg);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        input,
        textarea {
            width: 100%;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            transition: var(--transition);
            color: var(--text);
        }
        input::placeholder,
        textarea::placeholder {
            color: #94A3B8;
        }
        input:focus,
        textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(44, 111, 186, 0.2);
        }
        .grid-container {
            max-width: 1200px;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-block;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 15px;
            line-height: 1.5;
            text-align: center;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(44, 111, 186, 0.25);
        }
        .btn-primary:focus {
            box-shadow: 0 0 0 3px rgba(44, 111, 186, 0.2);
        }
        .btn-primary:active {
            transform: translateY(1px);
        }
        .btn-link {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-link:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
        }
        .btn-light {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
        }
        .btn-light:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
            border-color: var(--primary-light);
        }

        /* ===== 徽章/标签 ===== */
        .badge {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            line-height: 1.5;
            transition: var(--transition);
        }
        .badge:hover {
            background: var(--primary);
            color: #fff;
        }
        .badge-accent {
            background: rgba(217, 119, 54, 0.12);
            color: var(--accent);
        }
        .badge-accent:hover {
            background: var(--accent);
            color: #fff;
        }

        /* ===== 悬浮胶囊导航 ===== */
        .site-header {
            position: sticky;
            top: 16px;
            z-index: 100;
            max-width: 1160px;
            width: calc(100% - 32px);
            margin: 16px auto 0;
            background: var(--nav-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-radius: 999px;
            padding: 10px 28px;
            box-shadow: 0 4px 20px rgba(0, 20, 50, 0.08);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            transition: box-shadow 0.3s ease;
        }
        .site-header:hover {
            box-shadow: 0 6px 28px rgba(0, 20, 50, 0.10);
        }
        .logo {
            font-family: "Noto Serif SC", "Songti SC", serif;
            font-size: 24px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
            line-height: 1.2;
        }
        .logo i {
            color: var(--primary);
            font-size: 20px;
        }
        .logo:hover {
            color: var(--primary);
        }
        .main-nav ul {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0;
            padding: 0;
            list-style: none;
        }
        .main-nav a {
            display: block;
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 15px;
            color: var(--text);
            font-weight: 500;
        }
        .main-nav a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .main-nav a.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--primary-light);
            position: relative;
        }
        .main-nav a.active::after {
            content: "";
            display: block;
            width: 6px;
            height: 6px;
            background: var(--primary);
            border-radius: 50%;
            margin: 2px auto 0;
        }
        .header-cta {
            padding: 8px 20px;
            font-size: 14px;
            flex-shrink: 0;
        }
        .header-cta i {
            margin-right: 4px;
        }
        .hamburger {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary-light);
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 4px;
            cursor: pointer;
            transition: var(--transition);
        }
        .hamburger:hover {
            background: rgba(44, 111, 186, 0.2);
        }
        .hamburger span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: translateY(6px) rotate(45deg);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: translateY(-6px) rotate(-45deg);
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-section {
            padding: 32px 0 0;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 13px;
            color: var(--text-secondary);
        }
        .breadcrumb a {
            color: var(--primary);
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb .sep {
            color: var(--border);
        }
        .breadcrumb .current {
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* ===== 频道头部 ===== */
        .category-hero {
            padding: 16px 0 0;
        }
        .category-hero .channel-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
        }
        .category-hero .channel-tag::before {
            content: "";
            width: 24px;
            height: 2px;
            background: var(--accent);
            display: inline-block;
        }
        .category-hero h1 {
            font-family: "Noto Serif SC", serif;
            font-size: 36px;
            font-weight: 700;
            line-height: 1.25;
            margin: 0 0 12px;
            color: var(--text);
        }
        .category-hero .category-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 760px;
            line-height: 1.75;
            margin-bottom: 20px;
        }
        /* 工具条 */
        .filter-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding: 14px 0;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            margin-top: 12px;
        }
        .filter-tabs {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .filter-tab {
            display: inline-block;
            padding: 7px 20px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: transparent;
            border: 1px solid var(--border);
            cursor: pointer;
            transition: var(--transition);
        }
        .filter-tab:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .filter-tab.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .filter-info {
            font-size: 13px;
            color: var(--text-secondary);
        }
        .filter-info strong {
            color: var(--accent);
        }

        /* ===== 分类内容区 ===== */
        .category-content {
            padding: 40px 0 64px;
        }

        /* 大卡片 */
        .featured-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin-bottom: 36px;
        }
        .featured-card {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .featured-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .featured-card .card-media {
            width: 100%;
            aspect-ratio: 16 / 9;
            background: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 40px;
            border-bottom: 1px solid var(--border);
            overflow: hidden;
        }
        .featured-card .card-media .fa-solid {
            opacity: 0.6;
            transition: var(--transition);
        }
        .featured-card:hover .card-media .fa-solid {
            opacity: 1;
            transform: scale(1.05);
        }
        .featured-card .card-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .featured-card .card-meta {
            font-size: 13px;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
        }
        .featured-card .card-meta .time {
            color: var(--accent);
            font-weight: 600;
        }
        .featured-card h3 {
            font-family: "Noto Serif SC", serif;
            font-size: 20px;
            font-weight: 700;
            line-height: 1.4;
            margin: 0 0 12px;
        }
        .featured-card h3 a {
            color: var(--text);
        }
        .featured-card h3 a:hover {
            color: var(--primary);
        }
        .featured-card .card-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }
        .featured-card .card-footer {
            padding-top: 14px;
            border-top: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
        }
        .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
        }
        .card-link:hover {
            text-decoration: underline;
        }
        .card-link i {
            font-size: 12px;
            margin-left: 4px;
            transition: transform 0.3s ease;
        }
        .card-link:hover i {
            transform: translateX(3px);
        }

        /* 单行列表 */
        .list-rows {
            border-top: 1px solid var(--border);
        }
        .list-row {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 22px 0;
            border-bottom: 1px solid var(--border);
            transition: background 0.2s ease;
        }
        .list-row:hover {
            background: var(--bg-light);
        }
        .list-row .thumb {
            width: 120px;
            flex-shrink: 0;
            aspect-ratio: 4 / 3;
            border-radius: var(--radius-sm);
            background: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 20px;
            overflow: hidden;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .list-row:hover .thumb {
            border-color: var(--primary);
            color: var(--primary);
        }
        .list-row .row-content {
            flex: 1;
            min-width: 0;
        }
        .list-row .row-meta {
            font-size: 13px;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 6px;
        }
        .list-row .row-meta .tag-label {
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 999px;
            padding: 2px 10px;
            font-size: 12px;
            font-weight: 600;
        }
        .list-row h4 {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.5;
            margin: 0 0 6px;
        }
        .list-row h4 a {
            color: var(--text);
        }
        .list-row h4 a:hover {
            color: var(--primary);
        }
        .list-row .row-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .list-row .row-time {
            flex-shrink: 0;
            font-size: 13px;
            color: var(--accent);
            font-weight: 500;
            white-space: nowrap;
        }

        /* ===== 分页器 ===== */
        .pagination-bar {
            margin-top: 40px;
            display: flex;
            justify-content: center;
        }
        .pagination-bar .pagination {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0;
            padding: 0;
            list-style: none;
        }
        .pagination-bar .pagination a,
        .pagination-bar .pagination span {
            display: block;
            min-width: 40px;
            height: 40px;
            padding: 0 12px;
            border-radius: var(--radius-sm);
            background: #fff;
            border: 1px solid var(--border);
            color: var(--text);
            font-size: 14px;
            font-weight: 500;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        .pagination-bar .pagination a:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }
        .pagination-bar .pagination .current {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            font-weight: 600;
        }
        .pagination-bar .pagination .disabled {
            opacity: 0.5;
            pointer-events: none;
            background: var(--bg-light);
        }

        /* ===== 侧栏 ===== */
        .sidebar {
            margin-left: 8px;
        }
        .sidebar-widget {
            background: var(--bg-light);
            border-radius: var(--radius);
            padding: 24px;
            margin-bottom: 24px;
            border: 1px solid var(--border);
        }
        .sidebar-widget .widget-title {
            font-family: "Noto Serif SC", serif;
            font-size: 17px;
            font-weight: 700;
            margin: 0 0 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text);
        }
        .sidebar-widget .widget-title i {
            color: var(--primary);
            font-size: 15px;
        }
        .sidebar-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .sidebar-list li {
            margin-bottom: 2px;
        }
        .sidebar-list a {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 10px 0;
            font-size: 14px;
            color: var(--text);
            line-height: 1.6;
            border-bottom: 1px dashed var(--border);
            transition: var(--transition);
        }
        .sidebar-list li:last-child a {
            border-bottom: none;
        }
        .sidebar-list a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .sidebar-list a .arrow {
            color: var(--primary);
            font-weight: 700;
            font-size: 12px;
            margin-top: 4px;
            flex-shrink: 0;
        }
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-light);
            padding: 72px 0;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .faq-section .section-title {
            text-align: center;
            font-family: "Noto Serif SC", serif;
            font-size: 28px;
            font-weight: 700;
            margin: 0 0 12px;
        }
        .faq-section .section-sub {
            text-align: center;
            color: var(--text-secondary);
            font-size: 15px;
            margin-bottom: 40px;
        }
        .faq-list {
            max-width: 840px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item.open {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(44, 111, 186, 0.06);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            text-align: left;
            background: #fff;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 14px;
            transition: var(--transition);
        }
        .faq-item.open .faq-question {
            color: var(--primary);
        }
        .faq-item.open .faq-question .icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(45deg);
        }
        .faq-answer {
            padding: 0 22px;
            max-height: 0;
            overflow: hidden;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            transition: max-height 0.35s ease, padding 0.35s ease;
        }
        .faq-item.open .faq-answer {
            padding: 0 22px 20px;
            max-height: 300px;
        }

        /* ===== CTA区 ===== */
        .cta-section {
            background: var(--primary-color, var(--primary));
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 56px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section .cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }
        .cta-section .cta-text {
            flex: 1;
            min-width: 260px;
        }
        .cta-section .cta-text h2 {
            color: #fff;
            font-family: "Noto Serif SC", serif;
            font-size: 26px;
            margin: 0 0 10px;
        }
        .cta-section .cta-text p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 15px;
            margin: 0;
            line-height: 1.7;
        }
        .cta-section .cta-form-wrap {
            flex: 1;
            min-width: 300px;
            max-width: 520px;
            background: rgba(255, 255, 255, 0.12);
            border-radius: var(--radius);
            padding: 20px;
            backdrop-filter: blur(4px);
        }
        .cta-form {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .cta-form-row {
            display: flex;
            gap: 12px;
        }
        .cta-form-row .form-field {
            flex: 1;
        }
        .cta-form input,
        .cta-form textarea {
            background: rgba(255, 255, 255, 0.95);
            border-color: transparent;
        }
        .cta-form textarea {
            resize: vertical;
            min-height: 72px;
        }
        .cta-form .btn-primary {
            background: #fff;
            color: var(--primary-dark);
            border-color: #fff;
            font-weight: 700;
        }
        .cta-form .btn-primary:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
            border-color: var(--primary-light);
        }
        .cta-form input:focus,
        .cta-form textarea:focus {
            background: #fff;
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.25);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-light);
            border-top: 1px solid var(--border);
            padding: 40px 0 20px;
        }
        .footer-brand {
            font-family: "Noto Serif SC", serif;
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-brand i {
            color: var(--primary);
        }
        .footer-desc {
            font-size: 13px;
            color: var(--text-secondary);
            margin: 10px 0 0;
            line-height: 1.7;
        }
        .footer-links {
            display: flex;
            justify-content: flex-end;
            gap: 20px;
            flex-wrap: wrap;
        }
        .footer-links a {
            font-size: 14px;
            color: var(--text);
            font-weight: 500;
        }
        .footer-links a:hover {
            color: var(--primary);
        }
        .footer-copyright {
            text-align: center;
            font-size: 13px;
            color: var(--text-secondary);
            padding-top: 20px;
            margin-top: 28px;
            border-top: 1px solid var(--border);
        }

        /* ===== 移动端断点 ===== */
        @media (max-width: 1024px) {
            .featured-card h3 {
                font-size: 18px;
            }
            .list-row .row-excerpt {
                -webkit-line-clamp: 2;
            }
        }
        @media (max-width: 900px) {
            .site-header {
                max-width: calc(100% - 24px);
                margin-top: 12px;
                width: calc(100% - 24px);
            }
            .main-nav {
                display: none;
                position: absolute;
                top: calc(100% + 8px);
                left: 12px;
                right: 12px;
                background: var(--nav-bg);
                backdrop-filter: blur(12px);
                -webkit-backdrop-filter: blur(12px);
                border-radius: 16px;
                padding: 12px;
                box-shadow: 0 8px 24px rgba(0, 20, 50, 0.12);
                border: 1px solid var(--border);
            }
            .main-nav.open {
                display: block;
            }
            .main-nav ul {
                flex-direction: column;
                align-items: stretch;
                gap: 2px;
            }
            .main-nav a {
                text-align: center;
                padding: 12px 18px;
                border-radius: 10px;
            }
            .main-nav a.active::after {
                margin: 4px auto 0;
            }
            .hamburger {
                display: flex;
            }
            .header-cta {
                display: none;
            }
            .category-hero h1 {
                font-size: 30px;
            }
            .featured-grid {
                grid-template-columns: 1fr;
            }
            .list-row .thumb {
                width: 90px;
            }
            .cta-section .cta-inner {
                flex-direction: column;
            }
            .cta-section .cta-form-wrap {
                max-width: 100%;
                width: 100%;
            }
        }
        @media (max-width: 640px) {
            .site-header {
                padding: 8px 16px;
                border-radius: 999px;
            }
            .logo {
                font-size: 20px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .filter-bar {
                align-items: flex-start;
            }
            .filter-tabs {
                overflow-x: auto;
                max-width: 100%;
                padding-bottom: 4px;
            }
            .filter-tab {
                white-space: nowrap;
                padding: 6px 14px;
                font-size: 13px;
            }
            .breadcrumb-section {
                padding-top: 16px;
            }
            .sidebar {
                margin-left: 0;
                margin-top: 40px;
            }
            .list-row {
                gap: 12px;
                padding: 18px 0;
            }
            .list-row .thumb {
                width: 72px;
            }
            .list-row .row-time {
                display: none;
            }
            .list-row h4 {
                font-size: 15px;
            }
            .list-row .row-excerpt {
                -webkit-line-clamp: 1;
            }
            .faq-question {
                padding: 15px 16px;
                font-size: 14px;
            }
            .faq-answer {
                padding: 0 16px;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 16px;
            }
            .cta-section {
                padding: 40px 0;
            }
            .cta-form-row {
                flex-direction: column;
            }
        }
        @media (max-width: 420px) {
            .site-header {
                width: calc(100% - 20px);
                margin-top: 10px;
                border-radius: 20px;
            }
            .category-content {
                padding: 24px 0 40px;
            }
        }
        /* 打印隐藏导航 */
        @media print {
            .site-header,
            .filter-bar,
            .pagination-bar,
            .cta-section,
            .site-footer {
                display: none;
            }
        }