/* roulang page: index */
:root {
            --mg-primary: #FF5A00;
            --mg-primary-hover: #E04E00;
            --mg-primary-light: #FFF0E8;
            --mg-secondary: #0072FF;
            --mg-accent: #00C48C;
            --mg-dark: #0F141C;
            --mg-dark-card: #161D27;
            --mg-gray-bg: #F5F7FA;
            --mg-text-main: #1A202C;
            --mg-text-muted: #64748B;
            --mg-border: #E2E8F0;
            --mg-radius-sm: 8px;
            --mg-radius-md: 14px;
            --mg-radius-lg: 20px;
            --mg-shadow: 0 10px 30px rgba(15, 20, 28, 0.06);
            --mg-shadow-hover: 0 16px 40px rgba(255, 90, 0, 0.12);
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--mg-text-main);
            background-color: #FFFFFF;
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.25s ease;
        }

        /* 顶部促销通告条 */
        .top-promo-bar {
            background-color: var(--mg-dark);
            color: #A0AEC0;
            font-size: 0.825rem;
            padding: 7px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .top-promo-bar a {
            color: #CBD5E1;
        }
        .top-promo-bar a:hover {
            color: var(--mg-primary);
        }

        /* 主导航栏 */
        .site-navbar {
            background-color: #FFFFFF;
            box-shadow: 0 2px 15px rgba(0,0,0,0.04);
            padding: 14px 0;
            position: sticky;
            top: 0;
            z-index: 1020;
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.35rem;
            color: var(--mg-dark);
            letter-spacing: -0.5px;
        }
        .brand-logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--mg-primary), #FF8533);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-size: 1.2rem;
            box-shadow: 0 4px 12px rgba(255, 90, 0, 0.3);
        }
        .nav-link-custom {
            font-weight: 600;
            color: var(--mg-text-main);
            padding: 6px 14px;
            border-radius: 6px;
        }
        .nav-link-custom:hover, .nav-link-custom.active {
            color: var(--mg-primary);
            background-color: var(--mg-primary-light);
        }

        /* 按钮与徽章 */
        .btn-mg-primary {
            background: linear-gradient(135deg, var(--mg-primary), #FF7324);
            color: #FFFFFF;
            font-weight: 600;
            border-radius: var(--mg-radius-sm);
            padding: 10px 22px;
            border: none;
            box-shadow: 0 4px 16px rgba(255, 90, 0, 0.25);
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-mg-primary:hover {
            background: linear-gradient(135deg, var(--mg-primary-hover), var(--mg-primary));
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(255, 90, 0, 0.35);
        }
        .btn-mg-dark {
            background-color: var(--mg-dark);
            color: #FFFFFF;
            font-weight: 600;
            border-radius: var(--mg-radius-sm);
            padding: 10px 22px;
            border: 1px solid rgba(255,255,255,0.1);
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-mg-dark:hover {
            background-color: #1F2937;
            color: #FFFFFF;
            transform: translateY(-2px);
        }
        .badge-geo {
            background-color: var(--mg-primary-light);
            color: var(--mg-primary);
            font-size: 0.8rem;
            font-weight: 700;
            padding: 5px 12px;
            border-radius: 30px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        /* Hero 蓝图：无大图图标矩阵 + 状态条 + 短标题 */
        .hero-section {
            background: radial-gradient(circle at 50% 0%, #FFF5EF 0%, #FFFFFF 70%);
            padding: 60px 0 50px;
            border-bottom: 1px solid #EDF2F7;
        }
        .hero-status-bar {
            background: #FFFFFF;
            border: 1px solid var(--mg-border);
            border-radius: 50px;
            padding: 6px 18px;
            display: inline-flex;
            align-items: center;
            gap: 12px;
            font-size: 0.875rem;
            color: var(--mg-text-muted);
            box-shadow: 0 2px 10px rgba(0,0,0,0.03);
            margin-bottom: 24px;
        }
        .status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--mg-accent);
            box-shadow: 0 0 0 3px rgba(0, 196, 140, 0.2);
        }
        .hero-grid-item {
            background: #FFFFFF;
            border: 1px solid var(--mg-border);
            border-radius: var(--mg-radius-md);
            padding: 24px 20px;
            text-align: center;
            transition: all 0.3s ease;
            box-shadow: var(--mg-shadow);
        }
        .hero-grid-item:hover {
            border-color: var(--mg-primary);
            transform: translateY(-5px);
            box-shadow: var(--mg-shadow-hover);
        }
        .hero-grid-icon {
            width: 54px;
            height: 54px;
            background: var(--mg-primary-light);
            color: var(--mg-primary);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin: 0 auto 16px;
        }

        /* 统一卡片与布局 */
        .section-padding {
            padding: 85px 0;
        }
        .section-header {
            margin-bottom: 48px;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--mg-dark);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .section-desc {
            font-size: 1rem;
            color: var(--mg-text-muted);
            max-width: 720px;
            margin: 0 auto;
        }
        .card-custom {
            background: #FFFFFF;
            border: 1px solid var(--mg-border);
            border-radius: var(--mg-radius-md);
            padding: 28px;
            transition: all 0.3s ease;
            height: 100%;
            box-shadow: var(--mg-shadow);
        }
        .card-custom:hover {
            transform: translateY(-4px);
            border-color: rgba(255, 90, 0, 0.4);
            box-shadow: var(--mg-shadow-hover);
        }

        /* 指标卡片 */
        .metric-card {
            background: var(--mg-dark);
            color: #FFFFFF;
            border-radius: var(--mg-radius-md);
            padding: 30px 24px;
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(255,255,255,0.06);
        }
        .metric-card::after {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 90px;
            height: 90px;
            background: radial-gradient(circle, rgba(255,90,0,0.15) 0%, transparent 70%);
        }
        .metric-num {
            font-size: 2.3rem;
            font-weight: 800;
            color: var(--mg-primary);
            line-height: 1.1;
            margin-bottom: 8px;
            font-family: Arial, sans-serif;
        }

        /* 对比表 */
        .custom-table {
            border-collapse: separate;
            border-spacing: 0;
            width: 100%;
            border-radius: var(--mg-radius-md);
            overflow: hidden;
            border: 1px solid var(--mg-border);
        }
        .custom-table th {
            background: #F8FAFC;
            padding: 18px 24px;
            font-weight: 700;
            color: var(--mg-dark);
            border-bottom: 1px solid var(--mg-border);
        }
        .custom-table td {
            padding: 16px 24px;
            border-bottom: 1px solid #EDF2F7;
            vertical-align: middle;
        }
        .custom-table tr:last-child td {
            border-bottom: none;
        }
        .custom-table .col-highlight {
            background: rgba(255, 90, 0, 0.02);
            font-weight: 600;
            color: var(--mg-dark);
        }

        /* 裂变任务进度条与邀请卡 */
        .progress-stepper {
            display: flex;
            justify-content: space-between;
            position: relative;
            margin: 30px 0 20px;
        }
        .progress-stepper::before {
            content: '';
            position: absolute;
            top: 15px;
            left: 5%;
            right: 5%;
            height: 3px;
            background: #E2E8F0;
            z-index: 1;
        }
        .progress-bar-fill {
            position: absolute;
            top: 15px;
            left: 5%;
            width: 65%;
            height: 3px;
            background: var(--mg-primary);
            z-index: 2;
        }
        .step-node {
            position: relative;
            z-index: 3;
            text-align: center;
            background: #FFFFFF;
            padding: 0 8px;
        }
        .step-circle {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: #EDF2F7;
            color: var(--mg-text-muted);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.85rem;
            margin: 0 auto 8px;
            border: 2px solid #FFFFFF;
        }
        .step-node.active .step-circle {
            background: var(--mg-primary);
            color: #FFFFFF;
            box-shadow: 0 0 0 3px rgba(255,90,0,0.2);
        }

        /* 排行榜 */
        .rank-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .rank-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 18px;
            border-bottom: 1px solid #EDF2F7;
        }
        .rank-item:last-child {
            border-bottom: none;
        }
        .rank-badge {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            font-weight: 700;
            margin-right: 12px;
        }
        .rank-1 { background: #FFD700; color: #855D00; }
        .rank-2 { background: #E2E8F0; color: #475569; }
        .rank-3 { background: #FFEDD5; color: #C2410C; }
        .rank-other { background: #F1F5F9; color: #64748B; }

        /* FAQ 手风琴 */
        .accordion-button:not(.collapsed) {
            color: var(--mg-primary);
            background-color: var(--mg-primary-light);
            box-shadow: none;
        }
        .accordion-button:focus {
            box-shadow: 0 0 0 2px rgba(255, 90, 0, 0.25);
            border-color: var(--mg-primary);
        }
        .accordion-item {
            border: 1px solid var(--mg-border);
            border-radius: var(--mg-radius-sm) !important;
            margin-bottom: 12px;
            overflow: hidden;
        }

        /* 页脚 */
        .site-footer {
            background-color: #0B0E14;
            color: #94A3B8;
            padding: 70px 0 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.9rem;
        }
        .footer-title {
            color: #FFFFFF;
            font-weight: 700;
            font-size: 1.05rem;
            margin-bottom: 20px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a:hover {
            color: var(--mg-primary);
        }
        .footer-bottom {
            margin-top: 50px;
            padding-top: 25px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.825rem;
        }

        @media (max-width: 991px) {
            .section-padding { padding: 50px 0; }
            .section-title { font-size: 1.6rem; }
            .hero-section { padding: 40px 0; }
        }