/* roulang page: index */
:root {
            --color-primary: #6B46C1;
            --color-secondary: #00D4AA;
            --color-dark: #1A202C;
            --color-light: #F7FAFC;
            --color-text: #2D3748;
            --color-text-light: #718096;
            --color-border: #E2E8F0;
            --radius-sm: 4px;
            --radius-md: after 8px;
            --radius-lg: 12px;
            --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --shadow-card-hover: 0 10px 15px -3px rgba(107, 70, 193, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: ?
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            font-size: 1rem;
            line-height: 1.6;
            color: var(--color-text);
            background-color: #FFFFFF;
        }
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }
        /* Header & Navigation */
        header {
            background-color: #FFFFFF;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            position: sticky;
            top: 0;
            z-index: 1030;
        }
        .navbar-custom {
            padding: var(--spacing-sm) 0;
        }
        .navbar-brand {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--color-primary) !important;
            display: flex;
            align-items: center;
        }
        .navbar-brand .logo-icon {
            color: var(--color-secondary);
            margin-right: 10px;
        }
        .nav-link {
            color: var(--color-text) !important;
            font-weight: 500;
            margin: 0 var(--spacing-sm);
            padding: var(--spacing-xs) var(--spacing-sm) !important;
            border-radius: var(--radius-md);
            transition: all 0.3s ease;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--color-primary) !important;
            background-color: rgba(107, 70, 193, 0.08);
        }
        .nav-link.active {
            font-weight: 600;
        }
        .btn-cta {
            background-color: var(--color-secondary);
            color: white;
            font-weight: 600;
            padding: 12px 32px;
            border-radius: var(--radius-md);
            border: none;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-card);
        }
        .btn-cta:hover {
            background-color: #00c09c;
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
        }
        /* Hero Section */
        .hero {
            background: linear-gradient(135deg, var(--color-dark) 0%, #2D3748 100%);
            color: white;
            padding: 100px 0 80px;
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 50%;
            height: 100%;
            background: url('/assets/images/backpic/back-1.webp') no-repeat center right/contain;
            opacity: 0.6;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: var(--spacing-md);
        }
        .hero-subtitle {
            font-size: 1.25rem;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: var(--spacing-lg);
            max-width:跟踪
        }
        @media (max-width: 992px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .hero::before {
                width: 100%;
                opacity: 0.3;
                background-size: cover;
            }
        }
        /* Section Styling */
        section {
            padding: 80px 0;
        }
        .section-title {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--color-dark);
            text-align: center;
            margin-bottom: var(--spacing-lg);
        }
        .section-subtitle {
            color: var(--color-text-light);
            text-align: center;
            max-width: 700px;
            margin: 0 auto var(--spacing-lg);
            font-size: 1.125rem;
        }
        /* Asymmetric Grid */
        .asymmetric-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: var(--spacing-md);
            margin-bottom: var(--spacing-lg);
        }
        .card-featured {
            background: white;
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            box-shadow: var(--shadow-card);
            border-top: 4px solid var(--color-secondary);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .card-featured:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-card-hover);
        }
        .card-small {
            background: white;
            border-radius: var(--radius-lg);
            padding: var(--spacing-md);
            box-shadow: var(--shadow-card);
            margin-bottom: var(--spacing-md);
            transition: all 0.3s ease;
        }
        .card-small:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
        }
        @media (max-width: 768px) {
            .asymmetric-grid {
                grid-template-columns: 1fr;
            }
        }
        /* Stats Dashboard */
        .stats-container {
            background-color: var(--color-light);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-md);
            margin-bottom: var(--spacing-lg);
        }
        .stat-item {
            text-align: center;
            padding: var(--spacing-md);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--color-primary);
            line-height: 1;
            margin-bottom: 8px;
        }
        .stat-label {
            color: var(--color-text-light);
            font-size: 0.875rem;
        }
        @media (max-width: 992px) {
            .stats-container {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .stats-container {
                grid-template-columns: 1fr;
            }
        }
        /* Scrolling Cards for Scenarios */
        .scenarios-wrapper {
            overflow-x: auto;
            padding-bottom: var(--spacing-md);
            scrollbar-width: thin;
        }
        .scenarios-inner {
            display: flex;
            gap: var(--spacing-md);
            flex-wrap: nowrap;
            min-width: min-content;
        }
        .scenario-card {
            min-width: 280px;
            background: white;
            border-radius: var(--radius-lg);
            padding: var(--spacing-md);
            box-shadow: var(--shadow-card);
            flex-shrink: 0;
            transition: all 0.3s ease;
        }
        .scenario-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-card-hover);
        }
        .scenario-icon {
            font-size: 2rem;
            color: var(--color-secondary);
            margin-bottom: var(--spacing-sm);
        }
        /* Process Flow */
        .process-flow {
            display: flex;
            justify-content: center;
            align-items: flex-start;
            flex-wrap: wrap;
            gap: var(--spacing-lg);
            counter-reset: step;
        }
        .process-step {
            flex: 1;
            min-width: 200px;
            text-align: center;
            position: relative;
        }
        .process-step::before {
            counter-increment: step;
            content: counter(step);
            width: Joken;
            height: 40px;
            background: var(--color-primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin: 0 auto var(--spacing-sm);
        }
        .process-step:not(:last-child)::after {
            content: '';
            position: absolute;
            top: 20px;
            right: -30px;
            width: 60px;
            height: 2px;
            background-color: var(--color-border);
        }
        @media (max-width: 768px) {
            .process-step:not(:last-child)::after {
                display: none;
            }
            .process-step {
                min-width: 100%;
            }
        }
        /* FAQ */
        .accordion-custom .accordion-button {
            font-weight: 600;
            color: var(--color-dark);
            background-color: #FFFFFF;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md) !important;
            margin-bottom: 8px;
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            color: var(--color-primary);
            background-color: rgba(107, 70, 193, 0.08);
            border-color: var(--color-primary);
        }
        .accordion-custom .accordion-body {
            background-color: var(--color-light);
            border-radius: 0 0 var(--radius-md) var(--radius-md);
            border: 1px solid var(--color-border);
            border-top: none;
            color: var(--color-text);
        }
        /* Contact CTA */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary) 0%, #553C9A 100%);
            color: white;
            padding: 80px 0;
            border-radius: var(--radius-lg);
        }
        .cta-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: var(--spacing-md);
        }
        .form-control-custom {
            background-color: rgba(255, 255, 255, 0.9);
            border: none;
            border-radius: var(--radius-md);
            padding: 12px 16px;
            margin-bottom: var(--spacing-sm);
        }
        .form-control-custom:focus {
            box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.3);
        }
        /* Footer */
        footer {
            background-color: var(--color-dark);
            color: var(--color-text-light);
            padding: 60px 0 30px;
        }
        .footer-logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: white;
            margin-bottom: var(--spacing-md);
        }
        .footer-links a {
            color: var(--color-text-light);
            text-decoration: none;
            display: block;
            margin-bottom: 10px;
            transition: color 0.3s ease;
        }
        .footer-links a:hover {
            color: var(--color-secondary);
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: var(--spacing-md);
            margin-top: var(--spacing-lg);
            font-size: 0.875rem;
            text-align: center;
            color: rgba(255, 255, 255, 0.6);
        }
        /* Responsive Adjustments */
        @media (max-width: 992px) {
            section {
                padding: 60px 0;
            }
            .hero {
                padding: 80px 0 60px;
            }
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2rem;
            }
            .section-title {
                font-size: 2rem;
            }
            .nav-link {
                margin: 0;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #6B46C1;
            --secondary: #00D4AA;
            --dark: #1A202C;
            --light-bg: #F7FAFC;
            --text-primary: #2D3748;
            --text-secondary: #718096;
            --border-color: #E2E8F0;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 10px 15px -3px rgba(107, 70, 193, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
            --spacing-unit: 8px;
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--text-primary);
            line-height: 1.6;
            background-color: #FFFFFF;
            overflow-x: hidden;
        }

        .container-custom {
            width: 100%;
            max-width: 1200px;
            padding-right: calc(var(--spacing-unit) * 3);
            padding-left: calc(var(--spacing-unit) * 3);
            margin-right: auto;
            margin-left: auto;
        }

        @media (max-width: 768px) {
            .container-custom {
                padding-right: calc(var(--spacing-unit) * 2);
                padding-left: calc(var(--spacing-unit) * 2);
            }
        }

        /* 导航样式 - 与首页保持一致 */
        .navbar-custom {
            padding-top: 1.5rem;
            padding-bottom: 1.5rem;
            background-color: #FFFFFF;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
        }

        .navbar-brand {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            display: flex;
            align-items: center;
        }

        .logo-icon {
            font-size: 2rem;
            margin-right: 10px;
            color: var(--secondary);
        }

        .nav-link {
            font-weight: 500;
            color: var(--text-primary);
            margin: 0 1rem;
            padding: 0.5rem 0 !important;
            position: relative;
            transition: color 0.3s ease;
        }

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

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background-color: var(--primary);
            border-radius: 2px;
        }

        .btn-cta {
            background-color: var(--secondary);
            color: white;
            border: none;
            padding: 0.75rem 2rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .btn-cta:hover {
            background-color: #00c29b;
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .navbar-toggler {
            border: none;
            padding: 0.5rem;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 2px rgba(107, 70, 193, 0.25);
        }

        .navbar-toggler-icon {
            color: var(--primary);
            font-size: 1.5rem;
        }

        @media (max-width: 992px) {
            .navbar-collapse {
                background-color: #FFFFFF;
                padding: 1.5rem;
                border-radius: var(--radius);
                box-shadow: var(--shadow-hover);
                margin-top: 1rem;
            }
            .nav-link {
                margin: 0.5rem 0;
                display: block;
            }
        }

        /* 页面 Hero */
        .category-hero {
            background: linear-gradient(135deg, rgba(26, 32, 44, 0.95) 0%, rgba(107, 70, 193, 0.85) 100%), url('/assets/images/backpic/back-2.webp') center center no-repeat;
            background-size: cover;
            padding: 6rem 0 4rem;
            color: white;
            border-radius: 0 0 var(--radius) var(--radius);
            margin-bottom: 4rem;
        }

        .breadcrumb {
            background: transparent;
            padding: 0;
            margin-bottom: 1.5rem;
        }

        .breadcrumb-item a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
        }

        .breadcrumb-item.active {
            color: var(--secondary);
        }

        .category-title {
            font-size: 3rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .category-subtitle {
            font-size: 1.25rem;
            color: rgba(255, 255, 255, 0.9);
            max-width: 700px;
            margin-bottom: 2rem;
        }

        @media (max-width: 768px) {
            .category-hero {
                padding: 4rem 0 3rem;
                margin-bottom: 3rem;
            }
            .category-title {
                font-size: 2.25rem;
            }
            .category-subtitle {
                font-size: 1.1rem;
            }
        }

        /* 内容主板块 */
        .section-title {
            font-size: 2.25rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 3rem;
            text-align: center;
        }

        .tutorial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 2.5rem;
            margin-bottom: 5rem;
        }

        @media (max-width: 768px) {
            .tutorial-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
        }

        .tutorial-card {
            background: white;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all 0.3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .tutorial-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-hover);
        }

        .tutorial-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        .tutorial-content {
            padding: 1.75rem;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .tutorial-meta {
            display: flex;
            align-items: center;
            margin-bottom: 1rem;
        }

        .tutorial-tag {
            background-color: rgba(107, 70, 193, 0.1);
            color: var(--primary);
            padding: 0.25rem 0.75rem;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-right: 1rem;
        }

        .tutorial-duration {
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        .tutorial-card h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 1rem;
            line-height: 1.3;
        }

        .tutorial-card p {
            color: var(--text-secondary);
            margin-bottom: 1.5rem;
            flex-grow: 1;
        }

        .tutorial-link {
            color: var(--primary);
            font-weight: 600;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            transition: color 0.3s ease;
        }

        .tutorial-link:hover {
            color: var(--secondary);
        }

        .tutorial-link i {
            margin-left: 0.5rem;
            transition: transform 0.3s ease;
        }

        .tutorial-link:hover i {
            transform: translateX(4px);
        }

        /* 进阶学习板块 */
        .advanced-section {
            background-color: var(--light-bg);
            padding: 5rem 0;
            border-radius: var(--radius);
            margin-bottom: 5rem;
        }

        .advanced-card {
            background: white;
            padding: 2.5rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            height: 100%;
        }

        .advanced-icon {
            font-size: 3rem;
            color: var(--secondary);
            margin-bottom: 1.5rem;
        }

        .advanced-card h4 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--dark);
        }

        .advanced-card ul {
            padding-left: 1.25rem;
            color: var(--text-secondary);
        }

        .advanced-card li {
            margin-bottom: 0.5rem;
        }

        /* FAQ */
        .faq-accordion .accordion-item {
            border: none;
            background: transparent;
            margin-bottom: 1rem;
        }

        .faq-accordion .accordion-button {
            background-color: white;
            color: var(--dark);
            font-weight: 600;
            font-size: 1.1rem;
            padding: 1.5rem;
            border-radius: var(--radius) !important;
            box-shadow: var(--shadow);
            transition: all 0.3s ease;
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            background-color: var(--primary);
            color: white;
            box-shadow: var(--shadow-hover);
        }

        .faq-accordion .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(107, 70, 193, 0.25);
        }

        .faq-accordion .accordion-body {
            padding: 1.5rem;
            background-color: white;
            border-radius: 0 0 var(--radius) var(--radius);
            color: var(--text-secondary);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, #553C9A 100%);
            color: white;
            padding: 5rem 0;
            border-radius: var(--radius);
            text-align: center;
            margin-bottom: 5rem;
        }

        .cta-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
        }

        .cta-desc {
            font-size: 1.25rem;
            max-width: 700px;
            margin: 0 auto 3rem;
            opacity: 0.9;
        }

        .btn-cta-large {
            background-color: var(--secondary);
            color: white;
            padding: 1rem 3rem;
            font-size: 1.25rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
            border: none;
            transition: all 0.3s ease;
        }

        .btn-cta-large:hover {
            background-color: #00c29b;
            transform: translateY(-3px);
            box-shadow: 0 15px 20px rgba(0, 212, 170, 0.2);
        }

        /* 页脚样式 - 与首页保持一致 */
        footer {
            background-color: var(--dark);
            color: white;
            padding: 4rem 0 2rem;
        }

        .footer-logo {
            font-size: 1.75rem;
            font-weight: 700;
            color: white;
            margin-bottom: 1rem;
        }

        .text-white-80 {
            color: rgba(255, 255, 255, 0.8);
        }

        .footer-links {
            display: flex;
            flex-direction: column;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            margin-bottom: 0.75rem;
            transition: color 0.3s ease;
        }

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

        .form-control.bg-dark {
            background-color: rgba(255, 255, 255, 0.1) !important;
            border-color: rgba(255, 255, 255, 0.2);
            color: white;
        }

        .form-control.bg-dark::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }

        .form-control.bg-dark:focus {
            box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.25);
            border-color: var(--secondary);
        }

        .btn-secondary {
            background-color: var(--secondary);
            color: white;
            border: none;
            font-weight: 600;
        }

        .btn-secondary:hover {
            background-color: #00c29b;
        }

        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 2rem;
            margin-top: 3rem;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
        }