/* roulang page: index */
:root {
            --bg-primary: #0F1015;
            --bg-card: #181A20;
            --bg-elevated: #22252E;
            --brand-green: #00FF88;
            --brand-purple: #7928CA;
            --brand-purple-light: #9d4edd;
            --text-main: #F4F5F7;
            --text-muted: #8C92A4;
            --border-line: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(0, 255, 136, 0.35);
            --radius-card: 16px;
            --radius-pill: 999px;
            --radius-sm: 8px;
            --shadow-subtle: 0 10px 30px rgba(0, 0, 0, 0.45), 0 0 15px rgba(0, 255, 136, 0.05);
            --transition-smooth: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* 基础重置 */
        *, *::before, *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--bg-primary);
            color: var(--text-main);
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            line-height: 1.75;
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }
        p {
            margin-bottom: 1.25rem;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-smooth);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        /* 全局排版强化 */
        .title-h1 {
            font-size: clamp(2rem, 5vw, 3.5rem);
            line-height: 1.2;
            letter-spacing: -0.02em;
            font-weight: 800;
        }
        .title-h2 {
            font-size: clamp(1.5rem, 3.5vw, 2.25rem);
            line-height: 1.25;
            font-weight: 700;
            letter-spacing: -0.01em;
        }
        .tag-sub {
            display: inline-block;
            font-size: 0.75rem;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            color: var(--brand-green);
            background: rgba(0, 255, 136, 0.08);
            border: 1px solid rgba(0, 255, 136, 0.25);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            margin-bottom: 0.75rem;
            font-weight: 600;
        }

        /* 双行固定顶部导航 */
        .header-dual {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(15, 16, 21, 0.88);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-line);
        }
        .top-status-bar {
            background: #0a0b0e;
            font-size: 0.8rem;
            color: var(--text-muted);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            padding: 4px 0;
        }
        .status-dot {
            width: 8px;
            height: 8px;
            background-color: var(--brand-green);
            border-radius: 50%;
            display: inline-block;
            box-shadow: 0 0 8px var(--brand-green);
            margin-right: 6px;
        }
        .navbar-main {
            padding: 12px 0;
        }
        .brand-logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .brand-logo i {
            color: var(--brand-green);
            font-size: 1.5rem;
        }
        .nav-link-custom {
            color: var(--text-muted);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 6px 14px;
            transition: all var(--transition-smooth);
        }
        .nav-link-custom:hover {
            color: var(--brand-green);
        }
        .btn-brand-primary {
            background-color: var(--brand-green);
            color: #050608 !important;
            font-weight: 700;
            padding: 10px 24px;
            border-radius: var(--radius-pill);
            border: 1px solid var(--brand-green);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all var(--transition-smooth);
        }
        .btn-brand-primary:hover {
            box-shadow: 0 0 20px rgba(0, 255, 136, 0.45);
            transform: translateY(-2px);
            color: #000 !important;
        }
        .btn-brand-outline {
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-main);
            border: 1px solid var(--border-line);
            padding: 10px 24px;
            border-radius: var(--radius-pill);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all var(--transition-smooth);
        }
        .btn-brand-outline:hover {
            border-color: var(--brand-purple-light);
            background: rgba(121, 40, 202, 0.15);
            color: #fff;
            transform: translateY(-2px);
        }

        /* 通用卡片与板块 */
        .section-block {
            padding: 85px 0;
            border-bottom: 1px solid var(--border-line);
            position: relative;
        }
        .section-block.bg-alternate {
            background-color: #121319;
        }
        .custom-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-line);
            border-radius: var(--radius-card);
            padding: 28px;
            box-shadow: var(--shadow-subtle);
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        .custom-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-hover);
            box-shadow: 0 16px 36px rgba(0, 0, 0, 0.6), 0 0 20px rgba(0, 255, 136, 0.08);
        }

        /* Hero 轮播定制 */
        .hero-banner-wrap {
            position: relative;
            background: radial-gradient(circle at 80% 20%, rgba(121, 40, 202, 0.25) 0%, rgba(15, 16, 21, 0) 60%),
                        radial-gradient(circle at 20% 80%, rgba(0, 255, 136, 0.12) 0%, rgba(15, 16, 21, 0) 50%);
            padding: 70px 0 90px;
        }
        .faux-dashboard-panel {
            background: rgba(24, 26, 32, 0.85);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(0, 255, 136, 0.2);
            border-radius: var(--radius-card);
            padding: 24px;
            box-shadow: 0 20px 50px rgba(0,0,0,0.6);
        }
        .live-pulse-badge {
            display: inline-flex;
            align-items: center;
            background: rgba(0, 255, 136, 0.1);
            color: var(--brand-green);
            padding: 4px 10px;
            font-size: 0.8rem;
            border-radius: 4px;
            border: 1px solid rgba(0, 255, 136, 0.2);
            font-weight: 600;
        }

        /* Accordion 重写 */
        .accordion-item {
            background-color: var(--bg-card) !important;
            border: 1px solid var(--border-line) !important;
            margin-bottom: 12px;
            border-radius: 12px !important;
            overflow: hidden;
        }
        .accordion-button {
            background-color: var(--bg-card) !important;
            color: var(--text-main) !important;
            font-weight: 600;
            box-shadow: none !important;
            padding: 20px 24px;
        }
        .accordion-button:not(.collapsed) {
            color: var(--brand-green) !important;
            border-bottom: 1px solid var(--border-line);
        }
        .accordion-button::after {
            filter: invert(1);
        }
        .accordion-body {
            background-color: var(--bg-card);
            color: var(--text-muted);
            line-height: 1.8;
            padding: 20px 24px;
        }

        /* 指标大字 */
        .metric-value {
            font-size: 3rem;
            font-weight: 800;
            color: var(--brand-green);
            line-height: 1;
            margin-bottom: 8px;
            letter-spacing: -0.03em;
        }

        /* 价格方案高亮 */
        .pricing-active {
            border: 1px solid var(--brand-green) !important;
            position: relative;
        }
        .pricing-badge {
            position: absolute;
            top: 14px;
            right: 14px;
            background: var(--brand-green);
            color: #000;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 3px 8px;
            border-radius: 4px;
        }

        /* 页脚规范 */
        .footer-elite {
            background-color: #090A0D;
            border-top: 1px solid var(--border-line);
            padding: 60px 0 30px;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .footer-elite h5 {
            color: var(--text-main);
            font-weight: 700;
            margin-bottom: 1.25rem;
            font-size: 1.05rem;
        }
        .footer-links li {
            margin-bottom: 8px;
            list-style: none;
        }
        .footer-links {
            padding-left: 0;
        }

        @media (max-width: 991px) {
            .navbar-collapse {
                background: #14161D;
                padding: 20px;
                border-radius: 12px;
                margin-top: 12px;
                border: 1px solid var(--border-line);
            }
        }