/* roulang page: index */
* { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
            color: #333333;
            background-color: #ffffff;
            line-height: 1.6;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 { font-weight: 600; }
        h1 { font-size: 3rem; line-height: 1.2; }
        h2 { font-size: 2.25rem; line-height: 1.3; }
        h3 { font-size: 1.5rem; line-height: 1.4; }
        @media (max-width: 768px) {
            h1 { font-size: 2.5rem; }
            h2 { font-size: 2rem; }
            h3 { font-size: 1.25rem; }
        }
        .pg-container {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        @media (min-width: 1400px) {
            .pg-container { max-width: 1320px; }
        }
        .pg-btn-primary {
            background-color: #00C1D4;
            color: white;
            border-radius: 0.5rem;
            padding: 0.75rem 1.75rem;
            font-weight: 500;
            transition: all 0.3s ease;
            box-shadow: 0 4px 12px rgba(0, 193, 212, 0.2);
        }
        .pg-btn-primary:hover {
            background-color: #00A8B8;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 193, 212, 0.3);
        }
        .pg-btn-secondary {
            border: 2px solid #00C1D4;
            color: #00C1D4;
            background-color: transparent;
            border-radius: 0.5rem;
            padding: 0.75rem 1.75rem;
            font-weight: 500;
            transition: all 0.3s ease;
        }
        .pg-btn-secondary:hover {
            background-color: #00C1D4;
            color: white;
        }
        .pg-card {
            background: white;
            border-radius: 0.75rem;
            border: 1px solid #E9ECEF;
            box-shadow: 0 2px 8px rgba(15, 42, 90, 0.08);
            transition: all 0.3s ease;
            overflow: hidden;
        }
        .pg-card:hover {
            box-shadow: 0 8px 24px rgba(0, 193, 212, 0.15);
            transform: translateY(-4px);
            border-color: #00C1D4;
        }
        .pg-tag {
            display: inline-block;
            background-color: #FF9A1F;
            color: white;
            font-size: 0.75rem;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            font-weight: 500;
        }
        .pg-section-title {
            text-align: center;
            margin-bottom: 3rem;
            color: #0F2A5A;
        }
        .pg-section-title h2 {
            display: inline-block;
            position: relative;
            padding-bottom: 0.75rem;
        }
        .pg-section-title h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 4rem;
            height: 4px;
            background-color: #00C1D4;
            border-radius: 2px;
        }
        .mobile-menu-open { display: block !important; }
        .faq-item {
            border-bottom: 1px solid #E9ECEF;
        }
        .faq-question {
            padding: 1.5rem 0;
            cursor: pointer;
            font-weight: 500;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .faq-answer {
            padding-bottom: 1.5rem;
            color: #666666;
            display: none;
        }
        .faq-answer.active { display: block; }
        .pg-bg-gradient {
            background: linear-gradient(135deg, #0F2A5A 0%, #1A4B8C 100%);
        }
        .pg-feature-icon {
            width: 4rem;
            height: 4rem;
            background-color: rgba(0, 193, 212, 0.1);
            border-radius: 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            color: #00C1D4;
            font-size: 1.875rem;
        }
        .pg-scroll-container {
            display: flex;
            overflow-x: auto;
            gap: 1.5rem;
            padding-bottom: 1rem;
            scrollbar-width: thin;
            scrollbar-color: #00C1D4 #F8F9FA;
        }
        .pg-scroll-container::-webkit-scrollbar { height: 6px; }
        .pg-scroll-container::-webkit-scrollbar-track { background: #F8F9FA; border-radius: 3px; }
        .pg-scroll-container::-webkit-scrollbar-thumb { background-color: #00C1D4; border-radius: 3px; }
        @media (min-width: 992px) {
            .pg-scroll-container { overflow-x: visible; flex-wrap: wrap; }
        }

/* roulang page: category1 */
:root {
            /* 设计变量 */
            --pg-deep: #0F2A5A;
            --pg-cyan: #00C1D4;
            --pg-orange: #FF9A1F;
            --pg-bg: #F8F9FA;
            --pg-footer: #1A365D;
            --pg-text-dark: #333333;
            --pg-text-gray: #666666;
            --pg-border: #E9ECEF;
            --pg-shadow: 0 2px 8px rgba(15, 42, 90, 0.08);
            --pg-shadow-hover: 0 8px 24px rgba(0, 193, 212, 0.15);
            --radius-sm: 6px;
            --radius-md: 8px;
            --space-unit: 8px;
            --transition: all 0.3s ease;
        }

        /* Base Reset */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { font-size: 16px; scroll-behavior: smooth; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
            color: var(--pg-text-dark);
            background-color: #fff;
            line-height: 1.6;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5 { font-weight: 600; line-height: 1.3; }
        a { color: inherit; text-decoration: none; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, select, textarea { font: inherit; }
        .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 calc(var(--space-unit) * 3); }

        /* 容器与工具类 */
        .pg-container { width: 100%; max-width: 1200px; margin: 0 auto; padding-left: 24px; padding-right: 24px; }
        .pg-section { padding: 80px 0; }
        @media (max-width: 768px) {
            .pg-section { padding: 48px 0; }
        }

        /* 按钮系统 */
        .pg-btn-primary {
            display: inline-block;
            background-color: var(--pg-cyan);
            color: white;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: var(--radius-md);
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: var(--pg-shadow);
            text-align: center;
        }
        .pg-btn-primary:hover {
            background-color: #00A8B8;
            box-shadow: var(--pg-shadow-hover);
            transform: translateY(-2px);
        }
        .pg-btn-secondary {
            display: inline-block;
            background-color: transparent;
            color: var(--pg-cyan);
            font-weight: 600;
            padding: 10px 26px;
            border-radius: var(--radius-md);
            border: 2px solid var(--pg-cyan);
            cursor: pointer;
            transition: var(--transition);
        }
        .pg-btn-secondary:hover {
            background-color: var(--pg-cyan);
            color: white;
        }
        .pg-btn-ghost {
            display: inline-block;
            background-color: transparent;
            color: var(--pg-text-gray);
            font-weight: 500;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .pg-btn-ghost:hover {
            color: var(--pg-deep);
            background-color: var(--pg-bg);
        }

        /* 标签与徽章 */
        .pg-tag {
            display: inline-block;
            background-color: rgba(0, 193, 212, 0.1);
            color: var(--pg-cyan);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 50px;
            margin-right: 8px;
            margin-bottom: 8px;
        }
        .pg-tag-orange {
            background-color: rgba(255, 154, 31, 0.1);
            color: var(--pg-orange);
        }
        .pg-badge {
            position: absolute;
            top: 16px;
            right: 16px;
            background-color: var(--pg-orange);
            color: white;
            font-size: 0.7rem;
            font-weight: bold;
            padding: 2px 10px;
            border-radius: 4px;
            z-index: 2;
        }

        /* 导航样式 - 沿用首页结构，仅调整 active 状态 */
        .pg-header {
            background-color: white;
            box-shadow: 0 4px 12px rgba(15, 42, 90, 0.05);
            position: sticky;
            top: 0;
            z-index: 50;
        }
        .pg-nav {
            padding: 16px 0;
        }
        .pg-nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .pg-logo {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .pg-logo-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-md);
            background-color: var(--pg-deep);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 1.25rem;
        }
        .pg-logo-text {
            font-weight: bold;
            color: var(--pg-deep);
            font-size: 1.25rem;
        }
        .pg-logo-sub {
            color: var(--pg-text-gray);
            font-size: 0.75rem;
        }
        .pg-nav-desktop {
            display: none;
            align-items: center;
            gap: 32px;
        }
        @media (min-width: 768px) {
            .pg-nav-desktop { display: flex; }
        }
        .pg-nav-link {
            color: var(--pg-text-dark);
            font-weight: 500;
            padding-bottom: 6px;
            border-bottom: 2px solid transparent;
            transition: var(--transition);
        }
        .pg-nav-link:hover,
        .pg-nav-link.active {
            color: var(--pg-cyan);
            border-bottom-color: var(--pg-cyan);
        }
        .pg-nav-link.active {
            font-weight: 600;
        }
        .pg-mobile-menu-btn {
            display: block;
            color: var(--pg-text-dark);
            font-size: 1.5rem;
            background: none;
            border: none;
            cursor: pointer;
        }
        @media (min-width: 768px) {
            .pg-mobile-menu-btn { display: none; }
        }
        .pg-mobile-menu {
            display: none;
            margin-top: 16px;
            border-top: 1px solid var(--pg-border);
            padding-top: 16px;
        }
        .pg-mobile-menu.active {
            display: block;
        }
        .pg-mobile-link {
            display: block;
            color: var(--pg-text-dark);
            font-weight: 500;
            padding: 12px 0 12px 20px;
            border-left: 4px solid transparent;
            transition: var(--transition);
        }
        .pg-mobile-link:hover,
        .pg-mobile-link.active {
            color: var(--pg-cyan);
            border-left-color: var(--pg-cyan);
        }
        .pg-mobile-link.active {
            font-weight: 600;
        }

        /* 分类页 Hero */
        .pg-category-hero {
            background: linear-gradient(rgba(15, 42, 90, 0.85), rgba(15, 42, 90, 0.92)), url('/assets/images/backpic/back-2.webp') no-repeat center center / cover;
            color: white;
            padding: 100px 0 80px;
            text-align: center;
        }
        .pg-category-hero h1 {
            font-size: 3rem;
            font-weight: 700;
            margin-bottom: 24px;
        }
        .pg-category-hero p {
            font-size: 1.125rem;
            max-width: 700px;
            margin: 0 auto 32px;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .pg-category-hero { padding: 64px 0 48px; }
            .pg-category-hero h1 { font-size: 2.25rem; }
            .pg-category-hero p { font-size: 1rem; }
        }

        /* 筛选栏 */
        .pg-filter-bar {
            background-color: var(--pg-bg);
            padding: 20px 0;
            border-bottom: 1px solid var(--pg-border);
        }
        .pg-filter-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }
        .pg-filter-group {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .pg-filter-select {
            padding: 10px 16px;
            border: 1px solid var(--pg-border);
            border-radius: var(--radius-sm);
            background-color: white;
            color: var(--pg-text-dark);
            min-width: 180px;
            cursor: pointer;
            transition: var(--transition);
        }
        .pg-filter-select:focus {
            outline: none;
            border-color: var(--pg-cyan);
        }
        .pg-sort-label {
            color: var(--pg-text-gray);
            font-size: 0.875rem;
            margin-right: 8px;
        }

        /* 产品网格 */
        .pg-products-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 32px;
            margin-top: 48px;
        }
        @media (max-width: 768px) {
            .pg-products-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        .pg-product-card {
            background-color: white;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--pg-border);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
            position: relative;
        }
        .pg-product-card:hover {
            box-shadow: var(--pg-shadow-hover);
            transform: translateY(-8px);
        }
        .pg-product-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-bottom: 1px solid var(--pg-border);
        }
        .pg-product-body {
            padding: 24px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        .pg-product-tags {
            margin-bottom: 12px;
        }
        .pg-product-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--pg-deep);
            margin-bottom: 12px;
        }
        .pg-product-desc {
            color: var(--pg-text-gray);
            line-height: 1.7;
            margin-bottom: 20px;
            flex-grow: 1;
        }
        .pg-product-features {
            list-style: none;
            margin-bottom: 24px;
        }
        .pg-product-features li {
            padding-left: 24px;
            position: relative;
            margin-bottom: 8px;
            font-size: 0.875rem;
            color: var(--pg-text-dark);
        }
        .pg-product-features li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--pg-cyan);
            font-weight: bold;
        }
        .pg-product-footer {
            margin-top: auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .pg-product-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--pg-cyan);
            font-weight: 600;
            transition: var(--transition);
        }
        .pg-product-cta:hover {
            gap: 12px;
        }

        /* 侧边信息板块 */
        .pg-sidebar-section {
            background-color: var(--pg-bg);
            border-radius: var(--radius-md);
            padding: 32px;
            margin-top: 80px;
        }
        .pg-sidebar-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--pg-deep);
            margin-bottom: 24px;
            padding-bottom: 16px;
            border-bottom: 2px solid var(--pg-border);
        }
        .pg-resource-list {
            list-style: none;
            margin-bottom: 32px;
        }
        .pg-resource-list li {
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .pg-resource-list li i {
            color: var(--pg-cyan);
        }
        .pg-contact-form {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .pg-form-input {
            padding: 12px 16px;
            border: 1px solid var(--pg-border);
            border-radius: var(--radius-sm);
            background-color: white;
            transition: var(--transition);
        }
        .pg-form-input:focus {
            outline: none;
            border-color: var(--pg-cyan);
        }

        /* FAQ 板块 */
        .pg-faq-section {
            background-color: white;
            padding: 80px 0;
            border-top: 1px solid var(--pg-border);
        }
        .pg-ffaq-container {
            max-width: 800px;
            margin: 0 auto;
        }
        .pg-faq-title {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--pg-deep);
            text-align: center;
            margin-bottom: 48px;
        }
        .pg-faq-item {
            margin-bottom: 16px;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--pg-border);
        }
        .pg-faq-question {
            background-color: var(--pg-bg);
            padding: 20px 24px;
            font-weight: 600;
            color: var(--pg-deep);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: var(--transition);
        }
        .pg-faq-question:hover {
            background-color: #f0f3f8;
        }
        .pg-faq-question.active {
            color: var(--pg-cyan);
        }
        .pg-faq-icon {
            transition: transform 0.3s ease;
        }
        .pg-faq-question.active .pg-faq-icon {
            transform: rotate(180deg);
        }
        .pg-faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            color: var(--pg-text-gray);
            line-height: 1.7;
        }
        .pg-faq-answer.open {
            padding: 24px;
            max-height: 500px;
        }

        /* CTA 板块 */
        .pg-cta-section {
            background: linear-gradient(135deg, var(--pg-deep) 0%, #1A4B8C 100%);
            color: white;
            padding: 80px 0;
            text-align: center;
        }
        .pg-cta-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 24px;
        }
        .pg-cta-text {
            font-size: 1.125rem;
            max-width: 700px;
            margin: 0 auto 40px;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.7;
        }
        .pg-cta-buttons {
            display: flex;
            gap: 24px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* 页脚样式 - 沿用首页片段 */
        .pg-footer {
            background-color: var(--pg-footer);
            color: white;
            padding-top: 64px;
            padding-bottom: 32px;
        }
        .pg-footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 48px;
            margin-bottom: 48px;
        }
        @media (min-width: 768px) {
            .pg-footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (min-width: 992px) {
            .pg-footer-grid {
                grid-template-columns: repeat(4, 1fr);
            }
        }
        .pg-footer-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 24px;
        }
        .pg-footer-logo-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-md);
            background-color: rgba(255, 255, 255, 0.2);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 1.25rem;
        }
        .pg-footer-brand-text {
            font-weight: bold;
            font-size: 1.25rem;
        }
        .pg-footer-desc {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.875rem;
            line-height: 1.6;
            margin-bottom: 24px;
        }
        .pg-footer-social {
            display: flex;
            gap: 16px;
        }
        .pg-social-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: rgba(255, 255, 255, 0.1);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        .pg-social-icon:hover {
            background-color: var(--pg-cyan);
            transform: translateY(-3px);
        }
        .pg-footer-column h4 {
            font-weight: 600;
            font-size: 1.125rem;
            margin-bottom: 24px;
            padding-bottom: 12px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.2);
        }
        .pg-footer-links {
            list-style: none;
        }
        .pg-footer-links li {
            margin-bottom: 12px;
        }
        .pg-footer-links a {
            color: rgba(255, 255, 255, 0.7);
            transition: var(--transition);
            font-size: 0.875rem;
        }
        .pg-footer-links a:hover {
            color: white;
            padding-left: 4px;
        }
        .pg-footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            text-align: center;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.875rem;
        }
        .pg-footer-bottom a {
            color: var(--pg-cyan);
            text-decoration: underline;
        }
        .pg-footer-bottom a:hover {
            color: white;
        }