/* roulang page: index */
:root {
            --primary-color: #e91e63; /* 鲜艳粉红 */
            --secondary-color: #f06292; /* 柔和粉红 */
            --accent-color: #d81b60; /* 深粉红 */
            --background-color: #fce4ec; /* 淡粉背景 */
            --text-color: #333;
            --text-light: #666;
            --border-color: #f8bbd0;
            --border-radius: 8px;
            --shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
            --container-max-width: 1200px;
            --spacing-unit: 1rem;
            --font-family: 'Helvetica Neue', 'Arial', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', sans-serif;
        }

        body {
            margin: 0;
            font-family: var(--font-family);
            background-color: var(--background-color);
            color: var(--text-color);
            line-height: 1.7;
            scroll-behavior: smooth;
        }

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

        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: color 0.3s ease;
        }

        a:hover {
            color: var(--accent-color);
            text-decoration: underline;
        }

        h1, h2, h3, h4, h5, h6 {
            margin-top: 0;
            margin-bottom: calc(var(--spacing-unit) * 0.8);
            font-weight: 600;
            color: var(--primary-color);
        }

        h1 { font-size: 2.8rem; }
        h2 { font-size: 2.2rem; }
        h3 { font-size: 1.8rem; }
        h4 { font-size: 1.4rem; }

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

        .btn {
            display: inline-block;
            padding: calc(var(--spacing-unit) * 0.8) calc(var(--spacing-unit) * 1.5);
            border: none;
            border-radius: var(--border-radius);
            font-size: 1rem;
            font-weight: 600;
            text-align: center;
            cursor: pointer;
            transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
            box-shadow: var(--shadow);
            margin: calc(var(--spacing-unit) * 0.5) 0;
        }

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

        .btn-primary:hover {
            background-color: var(--accent-color);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(233, 30, 99, 0.3);
        }

        .btn-outline-primary {
            background-color: transparent;
            color: var(--primary-color);
            border: 2px solid var(--primary-color);
        }

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

        header {
            background-color: #fff;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            padding: var(--spacing-unit) 0;
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-color);
            text-decoration: none;
        }

        .logo span {
            color: var(--accent-color);
        }

        .nav-links {
            display: flex;
            gap: calc(var(--spacing-unit) * 2);
        }

        .nav-links a {
            color: var(--text-color);
            font-weight: 500;
            padding: 0.5rem 0;
            position: relative;
        }

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

        .nav-links a:hover::after {
            width: 100%;
        }

        .nav-links a.active {
            color: var(--primary-color);
            font-weight: 700;
        }

        .mobile-nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 2rem;
            cursor: pointer;
            color: var(--primary-color);
        }

        .hero {
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            color: #fff;
            text-align: center;
            padding: calc(var(--spacing-unit) * 8) calc(var(--spacing-unit) * 2);
            position: relative;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.4);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            margin: 0 auto;
        }

        .hero h1 {
            font-size: 3.5rem;
            color: #fff;
            margin-bottom: calc(var(--spacing-unit) * 1);
            text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
        }

        .hero p {
            font-size: 1.4rem;
            color: #eee;
            margin-bottom: calc(var(--spacing-unit) * 2);
            text-shadow: 1px 1px 5px rgba(0, 0, 0, 0.5);
        }

        .section {
            padding: calc(var(--spacing-unit) * 4) 0;
            text-align: center;
        }

        .section h2 {
            margin-bottom: calc(var(--spacing-unit) * 2);
            font-size: 2.4rem;
        }

        .section p {
            color: var(--text-light);
            font-size: 1.1rem;
            max-width: 700px;
            margin: 0 auto calc(var(--spacing-unit) * 3);
        }

        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: calc(var(--spacing-unit) * 2);
            text-align: left;
        }

        .card {
            background-color: #fff;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
        }

        .card-image {
            position: relative;
            overflow: hidden;
            background-color: var(--secondary-color); /* Fallback/placeholder color */
        }
        .card-image img {
            width: 100%;
            height: 250px; /* Fixed height for cards */
            object-fit: cover;
        }

        .card-content {
            padding: var(--spacing-unit) var(--spacing-unit) calc(var(--spacing-unit) * 1.5);
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .card-content h3 {
            font-size: 1.5rem;
            margin-bottom: calc(var(--spacing-unit) * 0.5);
            color: var(--primary-color);
        }

        .card-content p {
            font-size: 0.95rem;
            color: var(--text-light);
            margin-bottom: var(--spacing-unit);
            flex-grow: 1;
        }

        .card-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: var(--spacing-unit);
            padding-top: var(--spacing-unit);
            border-top: 1px solid var(--border-color);
        }

        .card-category {
            font-size: 0.85rem;
            color: var(--primary-color);
            background-color: rgba(233, 30, 99, 0.1);
            padding: 0.3rem 0.6rem;
            border-radius: 4px;
            font-weight: 600;
        }

        .card-date {
            font-size: 0.85rem;
            color: var(--text-light);
        }

        .cta-section {
            background-color: var(--primary-color);
            color: #fff;
            padding: calc(var(--spacing-unit) * 5) 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section h2 {
            font-size: 2.8rem;
            color: #fff;
            margin-bottom: calc(var(--spacing-unit) * 1);
        }

        .cta-section p {
            font-size: 1.2rem;
            color: #fff;
            opacity: 0.9;
            max-width: 700px;
            margin: 0 auto calc(var(--spacing-unit) * 2);
        }

        .faq-section {
            padding: calc(var(--spacing-unit) * 4) 0;
            background-color: #fff;
        }

        .faq-section h2 {
            margin-bottom: calc(var(--spacing-unit) * 2);
            font-size: 2.4rem;
        }

        .faq-item {
            border-bottom: 1px solid var(--border-color);
            padding: var(--spacing-unit) 0;
        }

        .faq-question {
            cursor: pointer;
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--primary-color);
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-right: 1.5rem;
        }

        .faq-question::after {
            content: '+';
            font-size: 1.5rem;
            transition: transform 0.3s ease;
        }

        .faq-item.open .faq-question::after {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            color: var(--text-light);
            font-size: 1rem;
            padding: 0 0;
            margin-top: var(--spacing-unit);
        }

        .faq-item.open .faq-answer {
            max-height: 200px; /* Adjust as needed */
            padding: var(--spacing-unit) 0;
        }

        footer {
            background-color: #f8bbd0; /* 稍深的粉色 */
            color: #333;
            padding: calc(var(--spacing-unit) * 3) 0;
            text-align: center;
            font-size: 0.9rem;
        }

        .footer-nav {
            display: flex;
            justify-content: center;
            gap: calc(var(--spacing-unit) * 2);
            margin-bottom: var(--spacing-unit);
        }

        .footer-nav a {
            color: #333;
            font-weight: 500;
        }

        .footer-nav a:hover {
            color: var(--accent-color);
            text-decoration: underline;
        }

        .copyright {
            margin-top: calc(var(--spacing-unit) * 2);
            opacity: 0.8;
        }

        @media (max-width: 768px) {
            h1 { font-size: 2.5rem; }
            h2 { font-size: 2rem; }
            .hero h1 { font-size: 2.8rem; }
            .hero p { font-size: 1.1rem; }

            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: #fff;
                padding: var(--spacing-unit) 0;
                box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
            }

            .nav-links a {
                padding: var(--spacing-unit) var(--spacing-unit) * 2;
                text-align: left;
                border-bottom: 1px solid var(--border-color);
            }

            .nav-links a:last-child {
                border-bottom: none;
            }

            .nav-links.active {
                display: flex;
            }

            .mobile-nav-toggle {
                display: block;
            }

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

        @media (max-width: 520px) {
            h1 { font-size: 2.2rem; }
            .hero h1 { font-size: 2.4rem; }
            .hero p { font-size: 1rem; }
            .section { padding: calc(var(--spacing-unit) * 3) 0; }
            .cta-section { padding: calc(var(--spacing-unit) * 4) 0; }
            .cta-section h2 { font-size: 2.2rem; }
            .cta-section p { font-size: 1.1rem; }
            .card-content { padding: var(--spacing-unit); }
            .card-image img { height: 200px; }
        }

/* roulang page: article */
:root {
            --primary-color: #8a2be2;
            --secondary-color: #dda0dd;
            --background-color: #f8f0f8;
            --text-color: #333;
            --light-text-color: #666;
            --border-color: #e6d8e6;
            --card-background: #fff;
            --button-hover-bg: #7a20c2;
            --button-hover-text: #fff;
            --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
            --rounded-lg: 8px;
            --spacing-md: 20px;
            --spacing-lg: 30px;
            --container-max-width: 1200px;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background-color: var(--background-color);
            color: var(--text-color);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        .container {
            max-width: var(--container-max-width);
            margin: 0 auto;
            padding: 0 15px;
        }

        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: color 0.3s ease;
        }

        a:hover {
            color: var(--button-hover-bg);
        }

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

        .article-content img {
            margin: var(--spacing-md) auto;
            border-radius: var(--rounded-lg);
            box-shadow: var(--shadow-md);
        }

        header {
            background-color: var(--card-background);
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
            padding: var(--spacing-md) 0;
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.8em;
            font-weight: bold;
            color: var(--primary-color);
        }

        .logo span {
            color: var(--secondary-color);
        }

        .nav-links a {
            margin-left: var(--spacing-md);
            font-size: 1.1em;
            color: var(--text-color);
            font-weight: 500;
            position: relative;
        }

        .nav-links a.active {
            color: var(--primary-color);
            font-weight: bold;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary-color);
            transition: width 0.3s ease;
        }

        .nav-links a:hover::after {
            width: 100%;
        }

        .mobile-nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8em;
            color: var(--text-color);
            cursor: pointer;
        }

        .hero-section {
            background-image: linear-gradient(rgba(138, 43, 226, 0.6), rgba(221, 160, 221, 0.6)), url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            color: #fff;
            text-align: center;
            padding: var(--spacing-lg) 0;
            margin-bottom: var(--spacing-lg);
            border-radius: var(--rounded-lg);
        }

        .hero-section h1 {
            font-size: 2.8em;
            margin-bottom: var(--spacing-md);
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
        }

        .hero-section p {
            font-size: 1.3em;
            margin-bottom: var(--spacing-lg);
            text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
        }

        .btn {
            display: inline-block;
            background-color: var(--primary-color);
            color: #fff;
            padding: 12px 30px;
            border-radius: var(--rounded-lg);
            font-size: 1.1em;
            font-weight: bold;
            transition: background-color 0.3s ease, transform 0.2s ease;
            box-shadow: var(--shadow-md);
            cursor: pointer;
        }

        .btn:hover {
            background-color: var(--button-hover-bg);
            transform: translateY(-2px);
            color: var(--button-hover-text);
        }

        .content-section {
            background-color: var(--card-background);
            padding: var(--spacing-lg) 0;
            margin-bottom: var(--spacing-lg);
            border-radius: var(--rounded-lg);
            box-shadow: var(--shadow-md);
        }

        .content-section h2 {
            text-align: center;
            font-size: 2em;
            margin-bottom: var(--spacing-lg);
            color: var(--primary-color);
        }

        .article-header {
            text-align: center;
            margin-bottom: var(--spacing-lg);
        }

        .article-header h1 {
            font-size: 2.5em;
            margin-bottom: var(--spacing-md);
            color: var(--primary-color);
        }

        .article-meta {
            color: var(--light-text-color);
            font-size: 0.9em;
        }

        .article-content {
            font-size: 1.1em;
            color: var(--text-color);
            margin-top: var(--spacing-lg);
        }

        .article-content h3 {
            font-size: 1.8em;
            margin-top: var(--spacing-lg);
            margin-bottom: var(--spacing-md);
            color: var(--primary-color);
        }

        .article-content p, .article-content ul, .article-content ol {
            margin-bottom: var(--spacing-md);
        }

        .article-content ul, .article-content ol {
            padding-left: 20px;
        }

        .article-content li {
            margin-bottom: 10px;
        }
        
        .no-content {
            text-align: center;
            padding: var(--spacing-lg) 0;
            font-size: 1.2em;
            color: var(--light-text-color);
        }
        
        .no-content a {
            font-weight: bold;
            color: var(--primary-color);
        }

        footer {
            background-color: #333;
            color: #fff;
            text-align: center;
            padding: var(--spacing-lg) 0;
            margin-top: var(--spacing-lg);
        }

        .footer-nav {
            margin-bottom: var(--spacing-md);
        }

        .footer-nav a {
            color: #fff;
            margin: 0 var(--spacing-md);
            font-size: 1.1em;
        }

        .footer-nav a:hover {
            color: var(--secondary-color);
        }

        .copyright {
            font-size: 0.9em;
            opacity: 0.8;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .logo {
                font-size: 1.5em;
            }

            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background-color: var(--card-background);
                padding: var(--spacing-md);
                box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
            }

            .nav-links.active {
                display: flex;
            }

            .nav-links a {
                margin: 10px 0;
                width: 100%;
                text-align: center;
                padding: 10px 0;
            }

            .mobile-nav-toggle {
                display: block;
            }

            .hero-section h1 {
                font-size: 2em;
            }

            .hero-section p {
                font-size: 1.1em;
            }

            .content-section {
                padding: var(--spacing-lg) 0;
            }

            .content-section h2 {
                font-size: 1.8em;
            }

            .article-header h1 {
                font-size: 2em;
            }

            .article-content {
                font-size: 1em;
            }
        }

/* roulang page: category1 */
:root {
            --primary-color: #e91e63; /* 品牌主色，如热烈红 */
            --secondary-color: #f50057; /* 辅助色，更深的粉红 */
            --accent-color: #ffffff; /* 点缀色，白色 */
            --background-color: #f8f8f8; /* 页面背景 */
            --text-color: #333333; /* 主要文字颜色 */
            --subtle-text-color: #777777; /* 次要文字颜色 */
            --border-color: #eeeeee; /* 分隔线/边框颜色 */
            --card-background: #ffffff; /* 卡片背景 */
            --button-hover-bg: var(--secondary-color);
            --button-hover-text: var(--accent-color);
            --nav-hover-bg: var(--secondary-color);
            --nav-hover-text: var(--accent-color);
            --container-max-width: 1200px;
            --spacing-unit: 16px;
            --card-border-radius: 8px;
            --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
        }

        /* Base Reset & Typography */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html, body {
            font-family: 'Helvetica Neue', Arial, 'PingFang SC', 'Hiragino Sans GB', 'Heiti SC', 'Microsoft YaHei', 'WenQuanYi Micro Hei', sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: var(--background-color);
            scroll-behavior: smooth;
        }

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

        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: color 0.3s ease;
        }

        a:hover {
            color: var(--secondary-color);
        }

        .container {
            max-width: var(--container-max-width);
            margin: 0 auto;
            padding: 0 calc(var(--spacing-unit) * 1.5);
        }

        /* Header & Navigation */
        header {
            background-color: var(--card-background);
            box-shadow: var(--box-shadow);
            padding: calc(var(--spacing-unit) * 1);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 1px solid var(--border-color);
        }

        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.8em;
            font-weight: bold;
            color: var(--primary-color);
            letter-spacing: -1px;
            text-decoration: none;
        }
        .logo span {
            color: var(--secondary-color);
        }

        .nav-links {
            display: flex;
            gap: calc(var(--spacing-unit) * 2);
        }

        .nav-links a {
            color: var(--text-color);
            font-weight: 500;
            padding: calc(var(--spacing-unit) * 0.5) calc(var(--spacing-unit));
            border-radius: var(--card-border-radius);
            transition: background-color 0.3s ease, color 0.3s ease;
        }

        .nav-links a:hover,
        .nav-links a.active {
            background-color: var(--nav-hover-bg);
            color: var(--nav-hover-text);
        }

        .mobile-nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8em;
            color: var(--primary-color);
            cursor: pointer;
        }

        /* Hero Section */
        .hero {
            position: relative;
            color: var(--accent-color);
            text-align: center;
            padding: calc(var(--spacing-unit) * 8) 0;
            background: url('/assets/images/backpic/back-1.webp') no-repeat center center/cover;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 500px;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.4);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }

        .hero h1 {
            font-size: 3.5em;
            margin-bottom: var(--spacing-unit);
            line-height: 1.2;
        }

        .hero p {
            font-size: 1.4em;
            margin-bottom: calc(var(--spacing-unit) * 3);
        }

        .hero .cta-button {
            display: inline-block;
            background-color: var(--primary-color);
            color: var(--accent-color);
            padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 3);
            border-radius: var(--card-border-radius);
            font-size: 1.2em;
            font-weight: bold;
            transition: background-color 0.3s ease, transform 0.3s ease;
            box-shadow: var(--box-shadow);
        }

        .hero .cta-button:hover {
            background-color: var(--button-hover-bg);
            color: var(--button-hover-text);
            transform: translateY(-3px);
        }

        /* Section Styling */
        .section {
            padding: calc(var(--spacing-unit) * 6) 0;
        }

        .section h2 {
            text-align: center;
            font-size: 2.8em;
            margin-bottom: calc(var(--spacing-unit) * 4);
            line-height: 1.3;
        }

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

        /* Card Grid */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: calc(var(--spacing-unit) * 3);
        }

        .card {
            background-color: var(--card-background);
            border-radius: var(--card-border-radius);
            box-shadow: var(--box-shadow);
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
        }

        .card img {
            width: 100%;
            height: 280px; /* Fixed height for consistent card images */
            object-fit: cover;
        }

        .card-content {
            padding: calc(var(--spacing-unit) * 2);
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .card-content h3 {
            font-size: 1.6em;
            margin-bottom: var(--spacing-unit);
            color: var(--primary-color);
        }

        .card-content p {
            font-size: 1em;
            color: var(--subtle-text-color);
            margin-bottom: calc(var(--spacing-unit) * 2);
        }

        .card-content .cta-button {
            display: inline-block;
            background-color: var(--secondary-color);
            color: var(--accent-color);
            padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2);
            border-radius: var(--card-border-radius);
            font-size: 1em;
            font-weight: bold;
            text-align: center;
            transition: background-color 0.3s ease, transform 0.3s ease;
            margin-top: auto; /* Pushes button to the bottom */
        }

        .card-content .cta-button:hover {
            background-color: var(--primary-color);
            transform: translateY(-2px);
        }

        /* FAQ Section */
        .faq-section {
            background-color: #ffffff;
            padding: calc(var(--spacing-unit) * 6) 0;
            border-bottom: 1px solid var(--border-color);
        }
        .faq-section h2 {
            color: var(--primary-color);
        }

        .faq-item {
            margin-bottom: calc(var(--spacing-unit) * 3);
            border-bottom: 1px solid var(--border-color);
            padding-bottom: calc(var(--spacing-unit) * 3);
        }

        .faq-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
            margin-bottom: 0;
        }

        .faq-question {
            font-size: 1.4em;
            font-weight: bold;
            color: var(--text-color);
            cursor: pointer;
            position: relative;
            padding-left: calc(var(--spacing-unit) * 2.5);
        }

        .faq-question::before {
            content: '+';
            position: absolute;
            left: 0;
            font-size: 1.6em;
            color: var(--primary-color);
            transition: transform 0.3s ease;
        }

        .faq-item.active .faq-question::before {
            transform: rotate(90deg);
        }

        .faq-answer {
            font-size: 1.1em;
            color: var(--subtle-text-color);
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            padding-left: calc(var(--spacing-unit) * 2.5);
            margin-top: var(--spacing-unit);
        }

        .faq-item.active .faq-answer {
            max-height: 200px; /* Adjust as needed */
            padding-top: var(--spacing-unit);
        }

        /* CTA Section */
        .cta-section {
            text-align: center;
            padding: calc(var(--spacing-unit) * 6) 0;
            background-color: var(--primary-color);
            color: var(--accent-color);
        }

        .cta-section h2 {
            font-size: 2.6em;
            margin-bottom: var(--spacing-unit);
        }

        .cta-section p {
            font-size: 1.2em;
            margin-bottom: calc(var(--spacing-unit) * 3);
        }

        .cta-section .cta-button {
            display: inline-block;
            background-color: var(--accent-color);
            color: var(--primary-color);
            padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 4);
            border-radius: var(--card-border-radius);
            font-size: 1.2em;
            font-weight: bold;
            transition: background-color 0.3s ease, transform 0.3s ease;
        }

        .cta-section .cta-button:hover {
            background-color: var(--secondary-color);
            color: var(--accent-color);
            transform: translateY(-3px);
        }

        /* Footer */
        footer {
            background-color: #1a1a1a; /* Dark footer background */
            color: #bbbbbb;
            padding: calc(var(--spacing-unit) * 4) 0;
            text-align: center;
        }

        .footer-nav {
            margin-bottom: calc(var(--spacing-unit) * 2);
        }

        .footer-nav a {
            color: #bbbbbb;
            margin: 0 calc(var(--spacing-unit));
            transition: color 0.3s ease;
        }

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

        .copyright {
            font-size: 0.9em;
        }

        /* Responsive Design */
        @media (max-width: 992px) {
            .nav-links {
                gap: var(--spacing-unit);
            }
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero h1 {
                font-size: 3em;
            }
            .hero p {
                font-size: 1.2em;
            }
            .section h2 {
                font-size: 2.4em;
            }
        }

        @media (max-width: 768px) {
            .mobile-nav-toggle {
                display: block;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: var(--card-background);
                box-shadow: var(--box-shadow);
                padding: var(--spacing-unit) 0;
                gap: 0;
            }
            .nav-links.active {
                display: flex;
            }
            .nav-links a {
                padding: var(--spacing-unit) calc(var(--spacing-unit) * 1.5);
                width: 100%;
                text-align: center;
                border-radius: 0;
            }
            .nav-links a:hover,
            .nav-links a.active {
                background-color: var(--border-color);
                color: var(--primary-color);
            }

            .hero {
                padding: calc(var(--spacing-unit) * 5) 0;
                min-height: 400px;
            }
            .hero h1 {
                font-size: 2.8em;
            }
            .hero p {
                font-size: 1.1em;
                margin-bottom: calc(var(--spacing-unit) * 2);
            }
            .section h2 {
                font-size: 2.2em;
                margin-bottom: calc(var(--spacing-unit) * 3);
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .card img {
                height: 250px;
            }
            .section {
                padding: calc(var(--spacing-unit) * 4) 0;
            }
            .faq-question {
                font-size: 1.2em;
            }
            .faq-answer {
                font-size: 1em;
            }
            .cta-section h2 {
                font-size: 2.2em;
            }
            .cta-section p {
                font-size: 1.1em;
            }
        }

        @media (max-width: 576px) {
            .logo {
                font-size: 1.6em;
            }
            .hero h1 {
                font-size: 2.2em;
            }
            .hero p {
                font-size: 1em;
            }
            .hero .cta-button {
                padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2);
                font-size: 1em;
            }
            .section h2 {
                font-size: 2em;
            }
            .card-content h3 {
                font-size: 1.3em;
            }
            .card-content p {
                font-size: 0.95em;
            }
            .cta-section h2 {
                font-size: 2em;
            }
            .cta-section p {
                font-size: 1em;
            }
            .cta-section .cta-button {
                padding: calc(var(--spacing-unit) * 1.2) calc(var(--spacing-unit) * 3);
                font-size: 1.1em;
            }
            .footer-nav a {
                display: block;
                margin: calc(var(--spacing-unit) * 0.5) 0;
            }
        }

/* roulang page: category2 */
/* CSS 变量定义 */
        :root {
            --primary-color: #e91e63; /* 鲜艳的粉红/紫红 */
            --secondary-color: #f50057; /* 强调色 */
            --background-color: #f8f9fa; /* 浅灰色背景 */
            --text-color: #333;
            --text-muted-color: #6c757d;
            --border-color: #dee2e6;
            --border-radius: 8px;
            --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
            --spacing-md: 24px;
            --container-max-width: 1200px;
            --nav-height: 70px;
            --footer-height: 100px;
        }

        /* 基础 Reset & Base */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            font-size: 16px;
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Helvetica Neue', Arial, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', sans-serif;
            line-height: 1.7;
            color: var(--text-color);
            background-color: var(--background-color);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: var(--secondary-color);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            border: none;
            background: none;
            cursor: pointer;
            font-family: inherit;
        }
        h1, h2, h3, h4, h5, h6 {
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        h1 { font-size: 2.5rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.75rem; }

        /* Container */
        .container {
            max-width: var(--container-max-width);
            margin: 0 auto;
            padding: 0 15px;
            width: 100%;
        }

        /* Header & Nav */
        header {
            background-color: #fff;
            box-shadow: var(--shadow-sm);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--nav-height);
            display: flex;
            align-items: center;
        }
        header .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }
        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: bold;
            color: var(--primary-color);
            display: flex;
            align-items: center;
        }
        .logo span {
            color: var(--secondary-color);
            margin-left: 5px;
        }
        .nav-links {
            display: flex;
            gap: 20px;
        }
        .nav-links a {
            color: var(--text-color);
            font-weight: 500;
            padding: 10px 15px;
            border-radius: var(--border-radius);
            transition: background-color 0.3s ease, color 0.3s ease;
        }
        .nav-links a:hover, .nav-links a.active {
            background-color: var(--primary-color);
            color: #fff;
        }
        .mobile-nav-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text-color);
        }

        /* Main Content Area */
        main {
            flex: 1;
            padding-top: var(--spacing-md);
            padding-bottom: var(--spacing-md);
        }

        /* Hero Section */
        .hero {
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            color: #fff;
            text-align: center;
            padding: 100px 0;
            position: relative;
            border-radius: var(--border-radius);
            margin-bottom: var(--spacing-md);
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 400px;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5); /* 半透明黑色遮罩 */
            border-radius: var(--border-radius);
        }
        .hero .hero-content {
            position: relative;
            z-index: 1;
            max-width: 800px;
            padding: 20px;
        }
        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 1rem;
            text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
        }
        .hero p {
            font-size: 1.2rem;
            margin-bottom: 2rem;
            text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.5);
        }

        /* Section Title */
        .section-title {
            text-align: center;
            margin-bottom: var(--spacing-md);
            padding-top: var(--spacing-md);
        }
        .section-title h2 {
            font-size: 2.5rem;
            margin-bottom: 0.5rem;
            color: var(--primary-color);
        }
        .section-title p {
            color: var(--text-muted-color);
            font-size: 1.1rem;
            max-width: 700px;
            margin: 0 auto;
        }

        /* Card Section */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: var(--spacing-md);
            margin-bottom: var(--spacing-md);
        }
        .card {
            background-color: #fff;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-md);
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
        }
        .card img {
            width: 100%;
            height: 250px; /* 固定卡片图片高度 */
            object-fit: cover;
            display: block;
        }
        .card-content {
            padding: var(--spacing-md);
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }
        .card-content h3 {
            font-size: 1.5rem;
            margin-bottom: 0.75rem;
            color: var(--primary-color);
        }
        .card-content p {
            font-size: 0.95rem;
            color: var(--text-muted-color);
            flex-grow: 1;
            margin-bottom: 1.5rem;
        }
        .card-footer {
            padding: 0 var(--spacing-md) var(--spacing-md) var(--spacing-md);
            margin-top: auto; /* 将页脚推到底部 */
        }
        .card-footer .btn {
            width: 100%;
            text-align: center;
        }

        /* Call to Action (CTA) */
        .cta-section {
            background-color: var(--primary-color);
            color: #fff;
            text-align: center;
            padding: 60px 0;
            margin-top: var(--spacing-md);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-md);
        }
        .cta-section h2 {
            font-size: 2.2rem;
            margin-bottom: 1rem;
        }
        .cta-section p {
            font-size: 1.1rem;
            margin-bottom: 2rem;
            opacity: 0.9;
        }
        .cta-section .btn {
            background-color: #fff;
            color: var(--primary-color);
            font-weight: bold;
            padding: 12px 30px;
            border-radius: 25px;
            box-shadow: var(--shadow-sm);
        }
        .cta-section .btn:hover {
            background-color: var(--secondary-color);
            color: #fff;
        }

        /* FAQ Section */
        .faq-section {
            padding: var(--spacing-md) 0;
        }
        .faq-item {
            background-color: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            margin-bottom: var(--spacing-md);
            overflow: hidden;
        }
        .faq-question {
            padding: var(--spacing-md);
            font-weight: bold;
            cursor: pointer;
            position: relative;
            transition: background-color 0.3s ease;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .faq-question::after {
            content: '+';
            font-size: 1.5rem;
            transition: transform 0.3s ease;
        }
        .faq-item.active .faq-question::after {
            transform: rotate(45deg);
        }
        .faq-question:hover {
            background-color: var(--background-color);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            padding: 0 var(--spacing-md);
            background-color: #fff; /* 保持答案背景色 */
        }
        .faq-answer p {
            padding-bottom: var(--spacing-md);
            margin-bottom: 0;
        }

        /* Buttons */
        .btn {
            display: inline-block;
            padding: 10px 25px;
            border-radius: 25px;
            background-color: var(--primary-color);
            color: #fff;
            font-weight: 500;
            text-align: center;
            transition: background-color 0.3s ease, transform 0.3s ease;
            border: 2px solid transparent; /* 预留边框空间 */
        }
        .btn:hover {
            background-color: var(--secondary-color);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn.btn-outline {
            background-color: transparent;
            color: var(--primary-color);
            border-color: var(--primary-color);
        }
        .btn.btn-outline:hover {
            background-color: var(--primary-color);
            color: #fff;
        }

        /* Footer */
        footer {
            background-color: #333;
            color: #ccc;
            padding: var(--spacing-md) 0;
            margin-top: auto; /* 将页脚推到底部 */
            text-align: center;
            height: var(--footer-height);
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        footer .container {
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .footer-nav {
            margin-bottom: 15px;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 15px;
        }
        .footer-nav a {
            color: #ccc;
            font-size: 0.9rem;
            transition: color 0.3s ease;
        }
        .footer-nav a:hover {
            color: #fff;
        }
        .copyright {
            font-size: 0.85rem;
            margin-top: 10px;
        }

        /* Responsive Design */
        @media (max-width: 992px) {
            :root {
                --spacing-md: 20px;
            }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .hero h1 { font-size: 2.8rem; }
            .hero p { font-size: 1.1rem; }
            .card-grid {
                grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            }
            .nav-links {
                display: none; /* 隐藏桌面导航，仅在 JS 中控制显示 */
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background-color: #fff;
                flex-direction: column;
                padding: var(--spacing-md) 0;
                box-shadow: var(--shadow-md);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                width: 100%;
                text-align: center;
                padding: 15px;
            }
            .mobile-nav-toggle {
                display: block;
            }
            .logo {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --nav-height: 60px;
            }
            .hero {
                min-height: 300px;
                padding: 60px 0;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .section-title h2 {
                font-size: 2rem;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .card img {
                height: 200px;
            }
            .cta-section h2 {
                font-size: 1.8rem;
            }
            .footer-nav {
                flex-direction: column;
                gap: 10px;
            }
        }

        @media (max-width: 576px) {
             .hero h1 {
                font-size: 1.8rem;
            }
            .hero p {
                font-size: 0.95rem;
            }
            .section-title h2 {
                font-size: 1.75rem;
            }
            .card-content {
                padding: var(--spacing-md);
            }
            .card-content h3 {
                font-size: 1.3rem;
            }
            .card-content p {
                font-size: 0.9rem;
            }
            .cta-section {
                padding: 40px 0;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
        }

/* roulang page: category3 */
:root {
            --primary-color: #d43f88;
            --secondary-color: #f0a202;
            --accent-color: #e05078;
            --background-color: #f8f8f8;
            --text-color: #333;
            --light-text-color: #666;
            --border-color: #eee;
            --card-bg-color: #fff;
            --container-max-width: 1200px;
            --spacing-unit: 16px;
            --header-height: 70px;
            --footer-height: 100px;
            --border-radius: 8px;
            --box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
            --transition-speed: 0.3s;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Helvetica Neue', Arial, 'Microsoft Yahei', sans-serif;
            line-height: 1.7;
            color: var(--text-color);
            background-color: var(--background-color);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        .container {
            width: 90%;
            max-width: var(--container-max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-unit);
        }

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

        a:hover {
            color: var(--accent-color);
            text-decoration: underline;
        }

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

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

        header {
            background-color: var(--card-bg-color);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--header-height);
            display: flex;
            align-items: center;
        }

        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }

        .logo {
            font-size: 1.8em;
            font-weight: bold;
            color: var(--primary-color);
        }

        .logo span {
            color: var(--secondary-color);
        }

        .nav-links {
            display: flex;
            gap: var(--spacing-unit) * 1.5;
        }

        .nav-links a {
            color: var(--text-color);
            font-weight: 500;
            padding: var(--spacing-unit) * 0.5;
            position: relative;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--primary-color);
        }

        .nav-links a.active::after,
        .nav-links a:hover::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--primary-color);
        }

        .mobile-nav-toggle {
            display: none;
            font-size: 1.8em;
            background: none;
            border: none;
            color: var(--text-color);
        }

        .hero {
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            color: #fff;
            text-align: center;
            padding: var(--spacing-unit) * 8 0;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 500px;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.4);
        }

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

        .hero h1 {
            font-size: 3.5em;
            margin-bottom: var(--spacing-unit) * 0.5;
            line-height: 1.2;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
        }

        .hero p {
            font-size: 1.4em;
            margin-bottom: var(--spacing-unit) * 2;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
        }

        .btn {
            display: inline-block;
            background-color: var(--accent-color);
            color: #fff;
            padding: var(--spacing-unit) * 1.2 var(--spacing-unit) * 2.5;
            border-radius: var(--border-radius);
            font-size: 1.1em;
            font-weight: bold;
            transition: var(--transition-speed);
            box-shadow: var(--box-shadow);
            border: none;
        }

        .btn:hover {
            background-color: var(--primary-color);
            color: #fff;
            text-decoration: none;
            transform: translateY(-3px);
        }

        main {
            flex: 1;
            padding: var(--spacing-unit) * 4 0;
        }

        section {
            margin-bottom: var(--spacing-unit) * 4;
        }

        h2 {
            text-align: center;
            font-size: 2.5em;
            margin-bottom: var(--spacing-unit) * 3;
            color: var(--primary-color);
        }

        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: var(--spacing-unit) * 2;
        }

        .card {
            background-color: var(--card-bg-color);
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            overflow: hidden;
            transition: transform var(--transition-speed), box-shadow var(--transition-speed);
            display: flex;
            flex-direction: column;
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
        }

        .card img {
            width: 100%;
            height: 250px;
            object-fit: cover;
        }

        .card-content {
            padding: var(--spacing-unit) * 1.5;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }

        .card-content h3 {
            font-size: 1.5em;
            margin-bottom: var(--spacing-unit);
            color: var(--primary-color);
        }

        .card-content p {
            font-size: 0.95em;
            color: var(--light-text-color);
            margin-bottom: var(--spacing-unit) * 1.5;
            flex-grow: 1;
        }

        .card-content .btn {
            align-self: flex-start;
            margin-top: auto;
            background-color: var(--secondary-color);
        }

        .card-content .btn:hover {
            background-color: var(--primary-color);
        }

        .feature-section {
            text-align: center;
            padding: var(--spacing-unit) * 4 0;
            background-color: #fff;
            border-radius: var(--border-radius);
        }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-unit) * 3;
            margin-top: var(--spacing-unit) * 3;
        }

        .feature-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: var(--spacing-unit) * 1.5;
        }

        .feature-item i {
            font-size: 3em;
            color: var(--accent-color);
            margin-bottom: var(--spacing-unit);
        }

        .feature-item h3 {
            font-size: 1.3em;
            margin-bottom: var(--spacing-unit) * 0.5;
            color: var(--primary-color);
        }

        .feature-item p {
            font-size: 0.9em;
            color: var(--light-text-color);
        }

        .faq-section {
            padding: var(--spacing-unit) * 4 0;
        }

        .faq-item {
            margin-bottom: var(--spacing-unit) * 1.5;
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            background-color: var(--card-bg-color);
            overflow: hidden;
        }

        .faq-question {
            background-color: #fcfcfc;
            padding: var(--spacing-unit) * 1.5;
            cursor: pointer;
            font-weight: bold;
            color: var(--primary-color);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .faq-question::after {
            content: '+';
            font-size: 1.5em;
            transition: var(--transition-speed);
        }

        .faq-item.open .faq-question::after {
            content: '-';
        }

        .faq-answer {
            padding: var(--spacing-unit) * 1.5;
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-speed) ease-out;
            background-color: var(--card-bg-color);
            color: var(--light-text-color);
        }

        .cta-section {
            background-image: linear-gradient(to right, var(--primary-color), var(--accent-color));
            color: #fff;
            text-align: center;
            padding: var(--spacing-unit) * 5 0;
            border-radius: var(--border-radius);
        }

        .cta-section h2 {
            color: #fff;
            margin-bottom: var(--spacing-unit) * 1.5;
            font-size: 2.8em;
        }

        .cta-section p {
            font-size: 1.2em;
            margin-bottom: var(--spacing-unit) * 3;
        }

        .cta-section .btn {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
        }

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

        footer {
            background-color: #333;
            color: #bbb;
            padding: var(--spacing-unit) * 3 0;
            text-align: center;
            margin-top: auto;
            height: var(--footer-height);
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .footer-nav {
            margin-bottom: var(--spacing-unit) * 1.5;
        }

        .footer-nav a {
            color: #bbb;
            margin: 0 var(--spacing-unit);
            font-size: 0.95em;
        }

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

        .copyright {
            font-size: 0.85em;
        }

        @media (max-width: 768px) {
            :root {
                --spacing-unit: 12px;
                --header-height: 60px;
            }

            .container {
                width: 95%;
            }

            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background-color: var(--card-bg-color);
                padding: var(--spacing-unit) * 2;
                box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
            }

            .nav-links.open {
                display: flex;
            }

            .nav-links a {
                margin-bottom: var(--spacing-unit);
                padding: var(--spacing-unit);
            }

            .nav-links a::after {
                display: none;
            }

            .mobile-nav-toggle {
                display: block;
            }

            .logo {
                font-size: 1.5em;
            }

            .hero {
                min-height: 350px;
                padding: var(--spacing-unit) * 6 0;
            }

            .hero h1 {
                font-size: 2.5em;
            }

            .hero p {
                font-size: 1.1em;
            }

            h2 {
                font-size: 2em;
                margin-bottom: var(--spacing-unit) * 2.5;
            }

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

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

            .cta-section h2 {
                font-size: 2em;
            }

            .cta-section p {
                font-size: 1em;
            }
        }

/* roulang page: category4 */
:root {
            --primary-color: #e91e63; /* 鲜活的粉色系 */
            --secondary-color: #f06292; /* 柔和的粉色系 */
            --background-color: #fce4ec; /* 浅粉色背景 */
            --text-color: #333;
            --text-muted-color: #777;
            --border-color: #f8bbd0;
            --card-background: #ffffff;
            --footer-background: #f48fb1;
            --hover-color: #d81b60;
            --active-color: #c2185b;
            --container-max-width: 1200px;
            --spacing-unit: 16px;
            --border-radius: 8px;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }

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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: var(--background-color);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
            position: relative;
            overflow-x: hidden;
        }

        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: color 0.3s ease;
        }

        a:hover,
        a:focus {
            color: var(--hover-color);
            text-decoration: underline;
        }

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

        .container {
            width: 90%;
            max-width: var(--container-max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-unit);
        }

        /* Header & Navigation */
        header {
            background-color: rgba(255, 255, 255, 0.9);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
            padding: var(--spacing-unit) 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            backdrop-filter: blur(10px);
        }

        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.8em;
            font-weight: bold;
            color: var(--primary-color);
            letter-spacing: 1px;
            text-decoration: none;
        }

        .logo span {
            color: var(--secondary-color);
        }

        .nav-links {
            display: flex;
            gap: calc(var(--spacing-unit) * 2);
        }

        .nav-links a {
            color: var(--text-color);
            font-weight: 500;
            padding: calc(var(--spacing-unit) / 2) 0;
            position: relative;
            transition: color 0.3s ease;
        }

        .nav-links a.active {
            color: var(--primary-color);
            font-weight: bold;
        }

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

        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }

        .mobile-nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8em;
            cursor: pointer;
            color: var(--text-color);
        }

        /* Hero Section */
        .hero {
            background-image: linear-gradient(to bottom, rgba(255, 255, 255, 0.8), rgba(248, 187, 208, 0.6)), url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            height: 70vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            padding: calc(var(--spacing-unit) * 4) var(--spacing-unit);
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, var(--secondary-color) 0%, var(--primary-color) 100%);
            opacity: 0.2;
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            color: var(--text-color);
        }

        .hero h1 {
            font-size: 3.5em;
            margin-bottom: var(--spacing-unit);
            color: #fff;
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
        }

        .hero p {
            font-size: 1.4em;
            color: #fff;
            text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
            max-width: 800px;
            margin: 0 auto;
        }

        /* Section Styles */
        section {
            padding: calc(var(--spacing-unit) * 4) 0;
        }

        section h2 {
            text-align: center;
            font-size: 2.5em;
            margin-bottom: calc(var(--spacing-unit) * 3);
            color: var(--primary-color);
        }

        .content-section {
            text-align: center;
        }

        .content-section p {
            max-width: 800px;
            margin: 0 auto calc(var(--spacing-unit) * 2);
            font-size: 1.1em;
            color: var(--text-muted-color);
        }

        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: calc(var(--spacing-unit) * 2);
        }

        .card {
            background-color: var(--card-background);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
        }

        .card img {
            width: 100%;
            height: 250px; /* Fixed height for consistency */
            object-fit: cover;
        }

        .card-content {
            padding: calc(var(--spacing-unit) * 2);
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .card-content h3 {
            font-size: 1.6em;
            margin-bottom: var(--spacing-unit);
            color: var(--primary-color);
        }

        .card-content p {
            font-size: 1em;
            color: var(--text-muted-color);
            margin-bottom: var(--spacing-unit);
        }

        .card-content .btn {
            display: inline-block;
            margin-top: var(--spacing-unit);
        }

        /* CTA Section */
        .cta {
            background-color: var(--primary-color);
            color: #fff;
            text-align: center;
            padding: calc(var(--spacing-unit) * 4) 0;
            position: relative;
            overflow: hidden;
        }

        .cta::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.1;
            z-index: 1;
        }

        .cta-content {
            position: relative;
            z-index: 2;
        }

        .cta h2 {
            color: #fff;
            font-size: 2.8em;
            margin-bottom: var(--spacing-unit);
        }

        .cta p {
            font-size: 1.2em;
            margin-bottom: calc(var(--spacing-unit) * 2);
        }

        .btn {
            background-color: var(--secondary-color);
            color: #fff;
            padding: calc(var(--spacing-unit) * 1.2) calc(var(--spacing-unit) * 2.5);
            border-radius: var(--border-radius);
            font-size: 1.1em;
            font-weight: bold;
            transition: background-color 0.3s ease, transform 0.2s ease;
            border: none;
            cursor: pointer;
            box-shadow: var(--shadow);
        }

        .btn:hover {
            background-color: var(--hover-color);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
        }

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

        /* FAQ Section */
        .faq-section {
            background-color: #fff;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            padding: calc(var(--spacing-unit) * 2);
        }

        .faq-item {
            border-bottom: 1px solid var(--border-color);
            padding-bottom: var(--spacing-unit);
            margin-bottom: var(--spacing-unit);
        }

        .faq-item:last-child {
            border-bottom: none;
            margin-bottom: 0;
            padding-bottom: 0;
        }

        .faq-question {
            font-size: 1.3em;
            font-weight: bold;
            color: var(--primary-color);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: var(--spacing-unit) 0;
        }

        .faq-question::after {
            content: '+';
            font-size: 1.5em;
            transition: transform 0.3s ease;
        }

        .faq-item.open .faq-question::after {
            content: '−';
            transform: rotate(0deg);
        }

        .faq-answer {
            font-size: 1em;
            color: var(--text-muted-color);
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
            padding: 0 var(--spacing-unit);
        }

        .faq-item.open .faq-answer {
            max-height: 200px; /* Adjust as needed */
            padding: var(--spacing-unit) var(--spacing-unit);
        }

        /* Footer */
        footer {
            background-color: var(--footer-background);
            color: #fff;
            padding: calc(var(--spacing-unit) * 3) 0;
            text-align: center;
            margin-top: auto; /* Pushes footer to the bottom */
        }

        .footer-nav {
            margin-bottom: var(--spacing-unit);
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: calc(var(--spacing-unit) * 1.5);
        }

        .footer-nav a {
            color: #fff;
            font-weight: 500;
            transition: color 0.3s ease;
        }

        .footer-nav a:hover {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: underline;
        }

        .copyright {
            font-size: 0.9em;
            opacity: 0.8;
        }

        /* Responsive Design */
        @media (max-width: 1024px) {
            .nav-links {
                gap: calc(var(--spacing-unit) * 1.5);
            }

            .hero h1 {
                font-size: 3em;
            }

            .hero p {
                font-size: 1.2em;
            }

            section h2 {
                font-size: 2.2em;
            }

            .card-content h3 {
                font-size: 1.4em;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background-color: rgba(255, 255, 255, 0.95);
                box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
                padding: var(--spacing-unit) 0;
                backdrop-filter: blur(10px);
            }

            .nav-links a {
                padding: var(--spacing-unit) var(--spacing-unit) * 2;
                width: 100%;
                text-align: center;
            }

            .nav-links a::after {
                display: none;
            }

            .mobile-nav-toggle {
                display: block;
            }

            .nav-links.active {
                display: flex;
            }

            .hero {
                height: 50vh;
                padding: calc(var(--spacing-unit) * 3) var(--spacing-unit);
            }

            .hero h1 {
                font-size: 2.5em;
            }

            .hero p {
                font-size: 1.1em;
            }

            section h2 {
                font-size: 2em;
                margin-bottom: calc(var(--spacing-unit) * 2);
            }

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

            .cta {
                padding: calc(var(--spacing-unit) * 3) 0;
            }

            .cta h2 {
                font-size: 2.2em;
            }

            .btn {
                padding: calc(var(--spacing-unit) * 1.1) calc(var(--spacing-unit) * 2);
                font-size: 1em;
            }

            .faq-question {
                font-size: 1.1em;
            }

            .footer-nav {
                flex-direction: column;
                gap: var(--spacing-unit);
            }
        }