/* roulang page: index */
:root {
            --primary: #E8453A;
            --primary-dark: #C0392B;
            --primary-light: #FDE8E7;
            --secondary: #1C2333;
            --accent: #00B4A6;
            --accent-light: #E0F7F5;
            --bg: #FAFAFA;
            --surface: #FFFFFF;
            --bg-light: #F2F4F6;
            --text-primary: #1C2333;
            --text-body: #3A3F4A;
            --text-muted: #6B7280;
            --border: #E5E7EB;
            --shadow-sm: 0 2px 12px rgba(0,0,0,0.04);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.06);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
            --radius-card: 16px;
            --radius-btn: 50px;
            --radius-sm: 12px;
            --radius-xs: 8px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Inter', 'SF Pro Display', sans-serif;
            --transition: 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg);
            color: var(--text-body);
            line-height: 1.7;
            margin: 0;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        h1, h2, h3, h4, h5, h6 {
            color: var(--text-primary);
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.01em;
        }

        h1 {
            font-size: 3.5rem;
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
        }

        h2 {
            font-size: 2.25rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
        }

        h3 {
            font-size: 1.5rem;
            font-weight: 600;
            line-height: 1.35;
        }

        p {
            margin-bottom: 1.5rem;
            color: var(--text-body);
        }

        .text-muted {
            color: var(--text-muted) !important;
        }

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

        a:hover {
            color: var(--primary-dark);
        }

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

        .container {
            max-width: 1320px;
        }

        .section {
            padding: 5rem 0;
        }

        .section-title {
            text-align: center;
            margin-bottom: 3rem;
        }

        .section-title h2 {
            font-size: 2.25rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.75rem;
        }

        .section-title .divider {
            width: 50px;
            height: 4px;
            background: var(--primary);
            margin: 0 auto;
            border-radius: 2px;
        }

        .section-title.left {
            text-align: left;
        }

        .section-title.left .divider {
            margin: 0;
        }

        .btn {
            font-weight: 600;
            padding: 0.75rem 2rem;
            border-radius: var(--radius-btn);
            transition: var(--transition);
            border: 2px solid transparent;
            font-size: 1rem;
            letter-spacing: 0.01em;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
        }

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

        .btn-primary:hover, .btn-primary:focus {
            background-color: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(232, 69, 58, 0.35);
        }

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

        .btn-outline-primary:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(232, 69, 58, 0.15);
        }

        .btn-light {
            background: rgba(255,255,255,0.15);
            border-color: rgba(255,255,255,0.6);
            color: #fff;
        }

        .btn-light:hover {
            background: #fff;
            border-color: #fff;
            color: var(--secondary);
            transform: translateY(-2px);
        }

        .btn-lg {
            padding: 0.9rem 2.5rem;
            font-size: 1.1rem;
        }

        .card-custom {
            background: var(--surface);
            border: none;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            height: 100%;
        }

        .card-custom:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .card-body {
            padding: 2rem;
        }

        /* 导航卡片化面板 */
        .navbar-custom {
            background: rgba(255,255,255,0.9);
            backdrop-filter: blur(12px);
            padding: 0.75rem 0;
            border-radius: 0 0 var(--radius-card) var(--radius-card);
            box-shadow: 0 4px 20px rgba(0,0,0,0.04);
            position: sticky;
            top: 0;
            z-index: 1030;
            transition: var(--transition);
            border-bottom: 4px solid transparent;
            border-image: linear-gradient(90deg, var(--primary), var(--accent)) 1;
        }

        .navbar-brand {
            font-weight: 800;
            font-size: 1.75rem;
            color: var(--secondary) !important;
            letter-spacing: -0.01em;
        }

        .navbar-brand span {
            color: var(--primary);
        }

        .nav-link-custom {
            color: var(--text-body) !important;
            font-weight: 500;
            padding: 0.5rem 1rem !important;
            border-radius: var(--radius-xs);
            margin: 0 0.15rem;
            transition: var(--transition);
            font-size: 0.95rem;
            background: transparent;
        }

        .nav-link-custom:hover, .nav-link-custom.active {
            color: var(--primary) !important;
            background: var(--primary-light);
            transform: translateY(-2px);
        }

        .nav-link-custom.active {
            border-bottom: 3px solid var(--primary);
            border-radius: 0;
            background: transparent;
            font-weight: 600;
        }

        .navbar-cta {
            background: var(--primary);
            color: #fff !important;
            border-radius: var(--radius-btn);
            padding: 0.5rem 1.5rem !important;
            font-weight: 600;
            margin-left: 1rem;
            transition: var(--transition);
        }

        .navbar-cta:hover {
            background: var(--primary-dark);
            transform: scale(1.03);
            box-shadow: 0 6px 18px rgba(232,69,58,0.4);
            color: #fff !important;
        }

        .offcanvas-body .nav-link-custom {
            display: block;
            margin: 0.25rem 0;
        }

        /* Hero 双栏杂志布局 */
        .hero-section {
            padding: 3rem 0 5rem;
            background: var(--bg);
        }

        .hero-image-wrapper {
            position: relative;
            border-radius: 60px 16px 60px 16px;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            min-height: 420px;
            height: 100%;
            display: flex;
            align-items: flex-end;
            padding: 1.5rem;
        }

        .hero-overlay-card {
            background: rgba(28, 35, 51, 0.75);
            backdrop-filter: blur(10px);
            border-radius: var(--radius-card);
            padding: 1.25rem;
            color: #fff;
            width: 100%;
            border: 1px solid rgba(255,255,255,0.15);
        }

        .hero-data-badge {
            display: inline-block;
            background: var(--accent-light);
            color: var(--accent);
            padding: 0.4rem 1.2rem;
            border-radius: var(--radius-xs);
            font-weight: 700;
            font-size: 1.5rem;
            line-height: 1.2;
        }

        .hero-highlight {
            color: var(--primary);
        }

        .stats-row {
            display: flex;
            gap: 2rem;
            margin: 2rem 0 1.5rem;
            flex-wrap: wrap;
        }

        .stat-item h4 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 0.2rem;
        }

        /* 亮点网格卡片 */
        .feature-icon {
            width: 60px;
            height: 60px;
            background: var(--primary-light);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 1.5rem;
            transition: var(--transition);
        }

        .card-custom:hover .feature-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(6deg);
        }

        /* 方案对比卡片 */
        .plan-card {
            border-radius: var(--radius-card);
            background: var(--surface);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
            border: 1px solid var(--border);
        }

        .plan-card.recommended {
            transform: scale(1.03);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
            position: relative;
            z-index: 2;
        }

        .plan-stripe {
            height: 6px;
            width: 100%;
        }

        .plan-stripe.basic { background: #9CA3AF; }
        .plan-stripe.pro { background: var(--secondary); }
        .plan-stripe.ultimate { background: linear-gradient(90deg, var(--primary), #F59E0B); }

        .plan-body {
            padding: 2rem;
        }

        .plan-recommend-badge {
            background: var(--primary);
            color: #fff;
            font-size: 0.8rem;
            padding: 0.2rem 1rem;
            border-radius: var(--radius-btn);
            position: absolute;
            top: 1rem;
            right: 1rem;
            font-weight: 600;
        }

        .feature-list {
            list-style: none;
            padding: 0;
            margin: 1.5rem 0;
        }

        .feature-list li {
            padding: 0.5rem 0;
            display: flex;
            align-items: center;
            gap: 0.6rem;
            color: var(--text-body);
        }

        .feature-list i {
            color: var(--accent);
            font-size: 1.1rem;
        }

        /* 案例瀑布流 */
        .case-card {
            border-radius: var(--radius-sm);
            overflow: hidden;
            position: relative;
            background: #ddd;
            margin-bottom: 1.5rem;
            transition: var(--transition);
        }

        .case-card img {
            width: 100%;
            display: block;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            transition: 0.4s ease;
        }

        .case-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(transparent, rgba(0,0,0,0.7));
            color: #fff;
            padding: 1.5rem;
            transform: translateY(10%);
            transition: 0.3s;
        }

        .case-card:hover .case-overlay {
            transform: translateY(0);
            background: linear-gradient(transparent, rgba(0,0,0,0.85));
        }

        .case-card:hover img {
            transform: scale(1.04);
        }

        /* 数据跑马灯 */
        .counter-item {
            text-align: center;
            padding: 1.5rem;
        }

        .counter-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }

        /* FAQ 手风琴 */
        .accordion-custom .accordion-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 1rem;
            background: var(--surface);
            overflow: hidden;
            transition: var(--transition);
        }

        .accordion-custom .accordion-button {
            font-weight: 700;
            font-size: 1.1rem;
            background: transparent;
            box-shadow: none;
            padding: 1.25rem;
            color: var(--text-primary);
            border-left: 4px solid transparent;
            transition: var(--transition);
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            background: var(--primary-light);
            color: var(--primary);
            border-left: 4px solid var(--primary);
        }

        .accordion-custom .accordion-body {
            padding: 1.25rem;
            color: var(--text-body);
            line-height: 1.7;
        }

        /* CTA 横幅 */
        .cta-banner {
            background: linear-gradient(135deg, var(--primary) 0%, #F59E0B 100%);
            border-radius: var(--radius-card);
            padding: 4rem 2rem;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.08'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E") repeat;
            pointer-events: none;
        }

        /* 页脚 */
        .footer {
            background: var(--secondary);
            color: #9CA3AF;
            padding: 4rem 0 2rem;
        }

        .footer h5 {
            color: #fff;
            font-weight: 600;
            margin-bottom: 1.25rem;
        }

        .footer a {
            color: #9CA3AF;
            text-decoration: none;
        }

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

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

        @media (max-width: 992px) {
            h1 { font-size: 2.8rem; }
            .hero-image-wrapper { min-height: 320px; border-radius: 40px 12px 40px 12px; }
        }

        @media (max-width: 768px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.75rem; }
            .section { padding: 3.5rem 0; }
            .plan-card.recommended { transform: none; }
            .stats-row { gap: 1rem; }
        }

        @media (max-width: 576px) {
            h1 { font-size: 2rem; }
            h2 { font-size: 1.55rem; }
            .card-body { padding: 1.5rem; }
            .btn { padding: 0.6rem 1.5rem; }
            .navbar-brand { font-size: 1.4rem; }
        }