/* roulang page: index */
:root {
            --primary: #1A5C2E;
            --primary-hover: #154A25;
            --primary-light: #E8F0EA;
            --accent-red: #E63946;
            --accent-red-hover: #C62D38;
            --accent-amber: #F4A261;
            --bg-warm: #F5F1EB;
            --bg-dark: #1E1E1E;
            --text-main: #2D2D2D;
            --text-light: #555;
            --text-white: #FFFFFF;
            --border-warm: #D6CFC4;
            --card-shadow: 0 2px 8px rgba(0,0,0,0.06);
            --card-shadow-hover: 0 8px 24px rgba(26,92,46,0.12);
            --radius-card: 12px;
            --radius-metric: 8px;
            --radius-btn: 6px;
        }
        
        * {
            box-sizing: border-box;
        }
        
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-main);
            background-color: var(--bg-warm);
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }
        
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }
        
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        
        button, input, select, textarea {
            font-family: inherit;
        }
        
        h1, h2, h3, h4, h5, h6 {
            margin: 0;
            line-height: 1.3;
        }
        
        p {
            margin: 0;
        }
        
        .container-custom {
            max-width: 1140px;
            margin: 0 auto;
            padding: 0 24px;
        }
        
        @media (max-width: 576px) {
            .container-custom {
                padding: 0 16px;
            }
        }
        
        /* 导航栏 */
        #navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: #FFFFFF;
            box-shadow: 0 1px 4px rgba(0,0,0,0.06);
            z-index: 1000;
            padding: 14px 0;
        }
        
        #navbar .container-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        
        .nav-logo {
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        
        .nav-logo i {
            font-size: 24px;
        }
        
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 20px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        
        .nav-menu li a {
            color: var(--text-main);
            font-weight: 400;
            font-size: 15px;
            padding: 6px 0;
            position: relative;
            transition: color 0.2s;
        }
        
        .nav-menu li a:hover,
        .nav-menu li a.active {
            color: var(--primary);
        }
        
        .nav-menu li a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
        }
        
        .nav-cta {
            background: var(--accent-red);
            color: #FFFFFF !important;
            padding: 10px 20px !important;
            border-radius: var(--radius-btn);
            font-weight: 600;
            transition: background 0.2s, box-shadow 0.2s;
            white-space: nowrap;
        }
        
        .nav-cta:hover {
            background: var(--accent-red-hover);
            box-shadow: 0 4px 12px rgba(230,57,70,0.3);
            color: #FFFFFF !important;
        }
        
        .hamburger {
            display: none;
            font-size: 24px;
            color: var(--text-main);
            background: none;
            border: none;
            cursor: pointer;
            padding: 4px 8px;
        }
        
        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: #FFFFFF;
                flex-direction: column;
                padding: 20px;
                box-shadow: 0 4px 12px rgba(0,0,0,0.08);
                gap: 12px;
            }
            
            .nav-menu.active {
                display: flex;
            }
            
            .hamburger {
                display: block;
            }
            
            #navbar .container-custom {
                flex-wrap: wrap;
            }
        }
        
        /* Hero */
        #hero {
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            color: var(--text-white);
        }
        
        #hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(0,0,0,0.55);
            z-index: 1;
        }
        
        #hero .container-custom {
            position: relative;
            z-index: 2;
            width: 100%;
        }
        
        .hero-content {
            max-width: 680px;
        }
        
        .hero-content h1 {
            font-size: 42px;
            font-weight: 700;
            letter-spacing: -0.5px;
            line-height: 1.2;
            margin-bottom: 20px;
        }
        
        .hero-subtitle {
            font-size: 18px;
            font-weight: 400;
            color: rgba(255,255,255,0.7);
            margin-bottom: 32px;
            line-height: 1.6;
        }
        
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-bottom: 36px;
        }
        
        .hero-stat-item {
            text-align: left;
        }
        
        .hero-stat-num {
            font-size: 34px;
            font-weight: 700;
            font-family: 'DIN', 'Courier New', monospace;
            color: var(--accent-amber);
            line-height: 1;
            margin-bottom: 4px;
        }
        
        .hero-stat-label {
            font-size: 14px;
            color: rgba(255,255,255,0.6);
        }
        
        .hero-cta-group {
            display: flex;
            gap: 16px;
            align-items: center;
            flex-wrap: wrap;
        }
        
        .btn-primary-hero {
            background: var(--accent-red);
            color: #FFFFFF;
            padding: 16px 36px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 16px;
            border: none;
            cursor: pointer;
            transition: background 0.2s, box-shadow 0.2s;
            display: inline-block;
        }
        
        .btn-primary-hero:hover {
            background: var(--accent-red-hover);
            box-shadow: 0 6px 20px rgba(230,57,70,0.4);
        }
        
        .btn-link-hero {
            color: rgba(255,255,255,0.9);
            text-decoration: underline;
            font-weight: 400;
            font-size: 16px;
            transition: color 0.2s;
        }
        
        .btn-link-hero:hover {
            color: #FFFFFF;
        }
        
        @media (max-width: 576px) {
            .hero-content h1 {
                font-size: 28px;
            }
            .hero-subtitle {
                font-size: 14px;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
            .hero-stat-num {
                font-size: 28px;
            }
            .btn-primary-hero {
                padding: 14px 28px;
                width: 100%;
                text-align: center;
            }
        }
        
        /* Metrics */
        #metrics {
            background: var(--bg-dark);
            padding: 80px 0;
        }
        
        #metrics h2 {
            font-size: 32px;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 48px;
            text-align: center;
        }
        
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 20px;
        }
        
        .metric-card {
            background: rgba(255,255,255,0.08);
            border-radius: var(--radius-metric);
            padding: 20px;
            text-align: center;
            transition: transform 0.2s, background 0.2s;
        }
        
        .metric-card:hover {
            background: rgba(255,255,255,0.12);
            transform: translateY(-2px);
        }
        
        .metric-num {
            font-size: 34px;
            font-weight: 700;
            font-family: 'DIN', 'Courier New', monospace;
            color: var(--accent-amber);
            margin-bottom: 8px;
        }
        
        .metric-label {
            font-size: 14px;
            color: rgba(255,255,255,0.7);
        }
        
        .metric-trend {
            display: inline-block;
            color: #2ECC71;
            font-size: 14px;
            margin-top: 6px;
        }
        
        @media (max-width: 992px) {
            .metrics-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        
        @media (max-width: 576px) {
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .metric-card {
                padding: 16px;
            }
            .metric-num {
                font-size: 26px;
            }
        }
        
        /* Services */
        #services {
            background: var(--bg-warm);
            padding: 80px 0;
        }
        
        #services h2 {
            font-size: 32px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 48px;
            text-align: center;
        }
        
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        
        .service-card {
            background: #FFFFFF;
            border-radius: var(--radius-card);
            border: 1px solid var(--border-warm);
            box-shadow: var(--card-shadow);
            overflow: hidden;
            transition: all 0.2s;
            display: flex;
            flex-direction: column;
        }
        
        .service-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--card-shadow-hover);
            border-color: var(--primary);
        }
        
        .service-card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            border-radius: var(--radius-card) var(--radius-card) 0 0;
        }
        
        .service-card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        
        .service-card-body h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 12px;
        }
        
        .service-card-body p {
            font-size: 14px;
            line-height: 1.6;
            color: var(--text-light);
            margin-bottom: 18px;
            flex: 1;
        }
        
        .service-card-link {
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color 0.2s;
        }
        
        .service-card-link:hover {
            color: var(--primary-hover);
        }
        
        @media (max-width: 768px) {
            .services-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        @media (max-width: 576px) {
            .services-grid {
                grid-template-columns: 1fr;
            }
        }
        
        /* Compare */
        #compare {
            background: #FFFFFF;
            padding: 80px 0;
        }
        
        #compare h2 {
            font-size: 32px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 48px;
            text-align: center;
        }
        
        .compare-table-wrapper {
            overflow-x: auto;
            border-radius: var(--radius-card);
            border: 1px solid var(--border-warm);
        }
        
        .compare-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 600px;
        }
        
        .compare-table th,
        .compare-table td {
            padding: 14px 20px;
            text-align: center;
            font-size: 14px;
        }
        
        .compare-table thead th {
            background: #F9F7F4;
            font-weight: 600;
            font-size: 16px;
            color: var(--text-main);
            border-bottom: 1px solid var(--border-warm);
        }
        
        .compare-table tbody tr:nth-child(even) {
            background: #F9F7F4;
        }
        
        .compare-table tbody td {
            color: var(--text-light);
            line-height: 2;
        }
        
        .compare-table .plan-recommended {
            background: #FFF9F0;
            position: relative;
        }
        
        .badge-hot {
            background: var(--accent-amber);
            color: #FFFFFF;
            font-size: 12px;
            font-weight: 600;
            padding: 2px 10px;
            border-radius: 20px;
            display: inline-block;
            margin-bottom: 8px;
        }
        
        .compare-table .price {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin: 8px 0;
        }
        
        .btn-plan {
            display: inline-block;
            padding: 8px 20px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 14px;
            transition: all 0.2s;
            margin-top: 8px;
        }
        
        .btn-plan-outline {
            border: 1px solid var(--primary);
            color: var(--primary);
            background: transparent;
        }
        
        .btn-plan-outline:hover {
            background: var(--primary-light);
        }
        
        .btn-plan-accent {
            background: var(--accent-red);
            color: #FFFFFF;
            border: none;
        }
        
        .btn-plan-accent:hover {
            background: var(--accent-red-hover);
        }
        
        .fa-check-circle {
            color: var(--primary);
        }
        
        .fa-minus-circle {
            color: #ccc;
        }
        
        @media (max-width: 576px) {
            .compare-table-wrapper {
                border-radius: 8px;
            }
        }
        
        /* FAQ */
        #faq {
            background: var(--bg-warm);
            padding: 80px 0;
        }
        
        #faq h2 {
            font-size: 32px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 40px;
            text-align: center;
        }
        
        .accordion-item {
            border: none !important;
            border-bottom: 1px solid var(--border-warm) !important;
            background: transparent;
            margin-bottom: 4px;
        }
        
        .accordion-button {
            font-size: 16px !important;
            font-weight: 600 !important;
            color: var(--primary) !important;
            background: transparent !important;
            box-shadow: none !important;
            padding: 18px 0 !important;
        }
        
        .accordion-button:not(.collapsed) {
            background: transparent !important;
            color: var(--primary) !important;
        }
        
        .accordion-button::after {
            display: none;
        }
        
        .accordion-button i {
            margin-right: 12px;
            transition: transform 0.2s;
        }
        
        .accordion-button:not(.collapsed) i {
            transform: rotate(90deg);
        }
        
        .accordion-body {
            font-size: 14px !important;
            line-height: 1.7 !important;
            color: var(--text-light) !important;
            padding: 0 0 20px 32px !important;
        }
        
        /* Contact CTA */
        #contact {
            background: var(--bg-dark);
            padding: 80px 0;
        }
        
        #contact h2 {
            font-size: 32px;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 40px;
            text-align: center;
        }
        
        .contact-grid {
            display: grid;
            grid-template-columns: 3fr 2fr;
            gap: 48px;
            align-items: start;
        }
        
        .contact-form label {
            color: rgba(255,255,255,0.8);
            font-size: 14px;
            margin-bottom: 6px;
            display: block;
        }
        
        .contact-form input,
        .contact-form select {
            width: 100%;
            padding: 12px 16px;
            border-radius: var(--radius-btn);
            border: 1px solid rgba(255,255,255,0.2);
            background: rgba(255,255,255,0.1);
            color: var(--text-white);
            font-size: 15px;
            margin-bottom: 18px;
            transition: border-color 0.2s;
        }
        
        .contact-form input:focus,
        .contact-form select:focus {
            outline: none;
            border-color: var(--primary);
            background: rgba(255,255,255,0.15);
        }
        
        .contact-form select option {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        
        .btn-submit {
            width: 100%;
            background: var(--accent-red);
            color: #FFFFFF;
            border: none;
            padding: 14px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 16px;
            cursor: pointer;
            transition: background 0.2s;
        }
        
        .btn-submit:hover {
            background: var(--accent-red-hover);
        }
        
        .contact-info {
            color: var(--text-white);
        }
        
        .contact-info-item {
            margin-bottom: 24px;
        }
        
        .contact-info-item i {
            color: var(--accent-amber);
            width: 24px;
            margin-right: 12px;
        }
        
        .contact-info-item span {
            font-size: 16px;
            color: rgba(255,255,255,0.8);
        }
        
        .contact-info-item .info-large {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-white);
            display: block;
            margin-bottom: 4px;
        }
        
        .privacy-note {
            font-size: 12px;
            color: rgba(255,255,255,0.5);
            margin-top: 12px;
        }
        
        .privacy-note a {
            color: var(--accent-amber);
            text-decoration: underline;
        }
        
        @media (max-width: 768px) {
            .contact-grid {
                grid-template-columns: 1fr;
            }
        }
        
        /* Footer */
        #footer {
            background: var(--bg-dark);
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 48px 0 24px;
        }
        
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        
        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        
        .footer-col p,
        .footer-col a {
            font-size: 14px;
            color: rgba(255,255,255,0.6);
            line-height: 1.8;
            display: block;
            margin-bottom: 6px;
        }
        
        .footer-col a:hover {
            color: var(--accent-amber);
        }
        
        .footer-logo {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 12px;
            display: block;
        }
        
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 20px;
            text-align: center;
            font-size: 12px;
            color: rgba(255,255,255,0.4);
        }
        
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        
        @media (max-width: 576px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        
        /* 通用工具 */
        .section-padding {
            padding: 80px 0;
        }
        
        @media (max-width: 576px) {
            .section-padding {
                padding: 60px 0;
            }
            h2 {
                font-size: 24px !important;
            }
        }