/* roulang page: index */
:root {
            --app-primary: #0FA958;
            --app-primary-dark: #0B8344;
            --app-primary-light: #E8F8F0;
            --app-secondary: #121824;
            --app-dark-card: #1B2333;
            --app-accent: #FF5E1E;
            --app-accent-hover: #E04D12;
            --app-bg-light: #F8FAFC;
            --app-bg-white: #FFFFFF;
            --app-text-main: #0F172A;
            --app-text-muted: #475569;
            --app-text-sub: #64748B;
            --app-border: rgba(226, 232, 240, 0.9);
            --app-radius-sm: 8px;
            --app-radius-md: 14px;
            --app-radius-lg: 20px;
            --app-shadow-sm: 0 4px 12px rgba(15, 23, 42, 0.04);
            --app-shadow-hover: 0 14px 28px rgba(15, 23, 42, 0.09);
            --app-transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* 基础重置 */
        *, *::before, *::after {
            box-sizing: border-box;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--app-text-main);
            background-color: var(--app-bg-light);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--app-transition);
        }
        img {
            max-width: 100%;
            height: auto;
            vertical-align: middle;
        }

        /* 顶部状态条与导航 */
        .top-event-bar {
            background-color: #0B1017;
            color: #94A3B8;
            font-size: 0.8125rem;
            padding: 7px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .event-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 2px 10px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
        }
        .chip-live {
            background-color: rgba(15, 169, 88, 0.18);
            color: #22C55E;
            border: 1px solid rgba(34, 197, 94, 0.3);
        }
        .chip-warmup {
            background-color: rgba(255, 94, 30, 0.18);
            color: #FF7A45;
            border: 1px solid rgba(255, 94, 30, 0.3);
        }
        .chip-replay {
            background-color: rgba(148, 163, 184, 0.15);
            color: #CBD5E1;
            border: 1px solid rgba(148, 163, 184, 0.25);
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1020;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--app-border);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
        }
        .brand-logo {
            font-size: 1.45rem;
            font-weight: 800;
            color: var(--app-secondary);
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: -0.5px;
        }
        .brand-logo-badge {
            background: linear-gradient(135deg, var(--app-primary), #0BD36D);
            color: #FFFFFF;
            width: 36px;
            height: 36px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 9px;
            font-size: 1rem;
            box-shadow: 0 4px 10px rgba(15, 169, 88, 0.3);
        }
        .nav-link {
            font-weight: 500;
            color: #334155 !important;
            padding: 8px 14px !important;
            font-size: 0.9375rem;
            border-radius: 6px;
            transition: var(--app-transition);
        }
        .nav-link:hover, .nav-link:focus {
            color: var(--app-primary) !important;
            background-color: rgba(15, 169, 88, 0.06);
        }
        .btn-cta-accent {
            background-color: var(--app-accent);
            color: #FFFFFF !important;
            font-weight: 600;
            border-radius: 30px;
            padding: 9px 24px;
            font-size: 0.9375rem;
            border: none;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--app-transition);
            box-shadow: 0 4px 14px rgba(255, 94, 30, 0.3);
        }
        .btn-cta-accent:hover {
            background-color: var(--app-accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(255, 94, 30, 0.4);
        }
        .btn-cta-primary {
            background-color: var(--app-primary);
            color: #FFFFFF !important;
            font-weight: 600;
            border-radius: 30px;
            padding: 10px 26px;
            font-size: 0.95rem;
            border: none;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--app-transition);
            box-shadow: 0 4px 14px rgba(15, 169, 88, 0.28);
        }
        .btn-cta-primary:hover {
            background-color: var(--app-primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(15, 169, 88, 0.38);
        }

        /* 统一板块样式规范 */
        .section-block {
            padding: 84px 0;
            position: relative;
        }
        .section-block-white {
            background-color: var(--app-bg-white);
        }
        .section-block-light {
            background-color: var(--app-bg-light);
        }
        .section-block-dark {
            background-color: #0D1117;
            color: #E2E8F0;
        }
        .section-tag {
            display: inline-block;
            font-size: 0.785rem;
            font-weight: 700;
            letter-spacing: 0.5px;
            text-transform: uppercase;
            padding: 4px 14px;
            border-radius: 30px;
            background-color: var(--app-primary-light);
            color: var(--app-primary);
            margin-bottom: 12px;
        }
        .section-tag-dark {
            background-color: rgba(15, 169, 88, 0.16);
            color: #34D399;
        }
        .section-title {
            font-size: 2.15rem;
            font-weight: 800;
            color: var(--app-text-main);
            letter-spacing: -0.6px;
            margin-bottom: 14px;
        }
        .section-title-dark {
            color: #FFFFFF;
        }
        .section-desc {
            font-size: 1rem;
            color: var(--app-text-sub);
            max-width: 760px;
            margin-bottom: 46px;
            line-height: 1.8;
        }
        .section-desc-dark {
            color: #94A3B8;
        }

        /* Hero 优惠券墙入口样式 */
        .hero-coupon-section {
            background: linear-gradient(135deg, #101622 0%, #1A2536 100%);
            color: #FFFFFF;
            padding: 70px 0 85px 0;
            position: relative;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            overflow: hidden;
        }
        .hero-bg-cover {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.18;
            pointer-events: none;
        }
        .hero-h1 {
            font-size: 2.75rem;
            font-weight: 900;
            line-height: 1.25;
            letter-spacing: -0.8px;
            margin-bottom: 20px;
        }
        .hero-highlight {
            color: #0BD36D;
            position: relative;
        }
        .coupon-master-card {
            background: linear-gradient(135deg, #FF682B 0%, #E64300 100%);
            border-radius: var(--app-radius-lg);
            padding: 34px 30px;
            position: relative;
            box-shadow: 0 16px 36px rgba(230, 67, 0, 0.35);
            border: 2px dashed rgba(255, 255, 255, 0.4);
            color: #FFFFFF;
            overflow: hidden;
        }
        .coupon-stamp {
            position: absolute;
            top: 18px;
            right: 20px;
            background: rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(4px);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 0.5px;
        }
        .coupon-val {
            font-size: 3.25rem;
            font-weight: 900;
            line-height: 1;
            margin: 14px 0 6px 0;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
        }
        .sub-coupon-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 14px;
            margin-top: 18px;
        }
        .sub-coupon-item {
            background: rgba(255, 255, 255, 0.08);
            border: 1px dashed rgba(255, 255, 255, 0.2);
            border-radius: var(--app-radius-md);
            padding: 16px;
            backdrop-filter: blur(8px);
            transition: var(--app-transition);
        }
        .sub-coupon-item:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.35);
        }

        /* 基础 Card 标准与交互 */
        .feature-box {
            background: var(--app-bg-white);
            border: 1px solid var(--app-border);
            border-radius: var(--app-radius-md);
            padding: 28px 24px;
            transition: var(--app-transition);
            height: 100%;
            position: relative;
        }
        .feature-box:hover {
            transform: translateY(-4px);
            box-shadow: var(--app-shadow-hover);
            border-color: rgba(15, 169, 88, 0.3);
        }
        .feature-icon-wrapper {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background-color: var(--app-primary-light);
            color: var(--app-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.35rem;
            margin-bottom: 20px;
        }
        .pain-badge {
            position: absolute;
            top: 20px;
            right: 20px;
            background: #FEE2E2;
            color: #DC2626;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 2px 10px;
            border-radius: 20px;
        }

        /* 步骤横轴 */
        .step-rail-card {
            background: #FFFFFF;
            border: 1px solid var(--app-border);
            border-radius: var(--app-radius-md);
            padding: 26px 20px;
            position: relative;
            text-align: left;
            height: 100%;
        }
        .step-seq-number {
            font-size: 2.2rem;
            font-weight: 900;
            color: rgba(15, 169, 88, 0.18);
            line-height: 1;
            margin-bottom: 8px;
        }

        /* 终端版本矩阵 */
        .terminal-box {
            background: #FFFFFF;
            border: 1px solid var(--app-border);
            border-radius: var(--app-radius-lg);
            padding: 34px 28px;
            position: relative;
            transition: var(--app-transition);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            height: 100%;
        }
        .terminal-box.featured {
            border: 2px solid var(--app-primary);
            box-shadow: 0 10px 28px rgba(15, 169, 88, 0.12);
        }
        .terminal-flag {
            position: absolute;
            top: -12px;
            right: 28px;
            background: var(--app-primary);
            color: #FFFFFF;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 3px 12px;
            border-radius: 20px;
        }

        /* 统计数据条 */
        .stat-item-card {
            border-right: 1px solid rgba(226, 232, 240, 0.8);
            padding: 10px 20px;
            text-align: center;
        }
        .stat-item-card:last-child {
            border-right: none;
        }
        .stat-digit {
            font-size: 2.75rem;
            font-weight: 900;
            color: var(--app-primary);
            line-height: 1.1;
            margin-bottom: 4px;
            letter-spacing: -1px;
        }

        /* 深度数据舱代码与面板 */
        .code-console {
            background-color: #06090E;
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--app-radius-md);
            padding: 22px;
            font-family: SFMono-Regular, Consolas, "Liberation Mono", Menlo, Courier, monospace;
            font-size: 0.85rem;
            color: #38BDF8;
            overflow-x: auto;
        }

        /* 手风琴 FAQ */
        .accordion-item {
            border: 1px solid var(--app-border);
            margin-bottom: 12px;
            border-radius: var(--app-radius-md) !important;
            overflow: hidden;
            background: #FFFFFF;
        }
        .accordion-button {
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--app-text-main);
            padding: 20px 24px;
            background-color: #FFFFFF;
        }
        .accordion-button:not(.collapsed) {
            color: var(--app-primary);
            background-color: var(--app-primary-light);
            box-shadow: none;
        }
        .accordion-button:focus {
            box-shadow: none;
            border-color: transparent;
        }
        .accordion-body {
            color: var(--app-text-muted);
            padding: 18px 24px 24px;
            font-size: 0.95rem;
            line-height: 1.8;
        }

        /* 页脚规范 */
        .site-footer {
            background-color: #0A0E14;
            color: #94A3B8;
            padding: 70px 0 35px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.875rem;
        }
        .footer-logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: #FFFFFF;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 16px;
        }
        .footer-title {
            color: #FFFFFF;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 20px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 11px;
        }
        .footer-links a {
            color: #94A3B8;
        }
        .footer-links a:hover {
            color: var(--app-primary);
            padding-left: 4px;
        }
        .footer-bottom {
            margin-top: 50px;
            padding-top: 25px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            color: #64748B;
            font-size: 0.8125rem;
        }

        /* 响应式断点优化 */
        @media (max-width: 991.98px) {
            .section-block {
                padding: 60px 0;
            }
            .stat-item-card {
                border-right: none;
                border-bottom: 1px solid rgba(226, 232, 240, 0.8);
                padding: 16px 0;
            }
            .stat-item-card:last-child {
                border-bottom: none;
            }
            .hero-h1 {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 575.98px) {
            .hero-h1 {
                font-size: 1.85rem;
            }
            .sub-coupon-row {
                grid-template-columns: 1fr;
            }
            .coupon-val {
                font-size: 2.75rem;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .brand-logo {
                font-size: 1.25rem;
            }
        }