/* roulang page: index */
:root {
            --bg-base: #0b0e14;
            --bg-surface: #121722;
            --bg-card: #161d2b;
            --bg-card-hover: #1c2536;
            --primary: #0df0a3;
            --primary-dark: #09b87c;
            --primary-glow: rgba(13, 240, 163, 0.24);
            --secondary: #7928ca;
            --secondary-glow: rgba(121, 40, 202, 0.28);
            --text-main: #f8fafc;
            --text-body: #94a3b8;
            --text-muted: #64748b;
            --border-subtle: rgba(255, 255, 255, 0.08);
            --border-highlight: rgba(13, 240, 163, 0.42);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-card: 0 14px 34px -8px rgba(0, 0, 0, 0.65);
            --shadow-neon: 0 0 24px rgba(13, 240, 163, 0.22);
            --transition: all 0.28s cubic-bezier(0.16, 1, 0.3, 1);
        }

        *, *::before, *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 112px;
        }

        body {
            margin: 0;
            background-color: var(--bg-base);
            background-image: 
                radial-gradient(circle at 12% 18%, rgba(13, 240, 163, 0.06) 0%, transparent 32%),
                radial-gradient(circle at 88% 45%, rgba(121, 40, 202, 0.07) 0%, transparent 36%),
                linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
            background-size: 100% 100%, 100% 100%, 40px 40px, 40px 40px;
            color: var(--text-body);
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
            line-height: 1.8;
            overflow-x: hidden;
        }

        h1, h2, h3, h4, h5, h6 {
            color: var(--text-main);
            font-weight: 700;
            letter-spacing: -0.01em;
            line-height: 1.32;
        }

        p {
            margin-bottom: 1.25rem;
        }

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

        a:hover {
            color: #4ff7bd;
        }

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

        /* 顶部微型状态条 */
        .topbar-status {
            background: rgba(8, 11, 16, 0.96);
            border-bottom: 1px solid var(--border-subtle);
            font-size: 0.82rem;
            padding: 7px 0;
            color: var(--text-body);
        }

        .status-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            background-color: var(--primary);
            border-radius: 50%;
            box-shadow: 0 0 10px var(--primary);
            margin-right: 6px;
            animation: pulseDot 2s infinite;
        }

        @keyframes pulseDot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.55; transform: scale(1.25); }
        }

        .os-pill {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 2px 8px;
            border-radius: 4px;
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-main);
            font-size: 0.76rem;
            margin-right: 6px;
        }

        /* 主导航栏 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(11, 14, 20, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
        }

        .navbar-custom {
            padding: 12px 0;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            color: var(--text-main) !important;
            font-weight: 800;
            font-size: 1.28rem;
        }

        .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #06110d;
            font-size: 1.35rem;
            box-shadow: var(--shadow-neon);
        }

        .nav-link-custom {
            color: var(--text-body) !important;
            font-weight: 500;
            font-size: 0.94rem;
            padding: 8px 13px !important;
            border-radius: var(--radius-sm);
            min-height: 44px;
            display: inline-flex;
            align-items: center;
            transition: var(--transition);
        }

        .nav-link-custom:hover,
        .nav-link-custom.active {
            color: var(--primary) !important;
            background: rgba(13, 240, 163, 0.08);
        }

        /* 按钮体系 */
        .btn-cyber {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 46px;
            padding: 10px 24px;
            background: linear-gradient(135deg, var(--primary) 0%, #07c888 100%);
            color: #05130e !important;
            font-weight: 700;
            border-radius: var(--radius-sm);
            border: none;
            box-shadow: 0 6px 20px rgba(13, 240, 163, 0.3);
            transition: var(--transition);
            position: relative;
        }

        .btn-cyber:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(13, 240, 163, 0.45);
            background: linear-gradient(135deg, #2bf6b1 0%, var(--primary) 100%);
        }

        .btn-outline-cyber {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 46px;
            padding: 10px 24px;
            background: rgba(255, 255, 255, 0.03);
            color: var(--text-main) !important;
            font-weight: 600;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(13, 240, 163, 0.4);
            transition: var(--transition);
        }

        .btn-outline-cyber:hover {
            background: rgba(13, 240, 163, 0.12);
            border-color: var(--primary);
            color: var(--primary) !important;
            transform: translateY(-2px);
        }

        .version-badge {
            background: var(--secondary);
            color: #fff;
            font-size: 0.68rem;
            padding: 2px 6px;
            border-radius: 4px;
            margin-left: 4px;
            font-weight: 700;
        }

        /* 通用 Section 与标题样式 */
        .section-block {
            padding: 88px 0;
            position: relative;
            border-bottom: 1px solid var(--border-subtle);
        }

        .section-alt {
            background-color: var(--bg-surface);
        }

        .section-pure-dark {
            background-color: #06080c;
        }

        .section-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 5px 14px;
            border-radius: 999px;
            background: rgba(13, 240, 163, 0.1);
            border: 1px solid rgba(13, 240, 163, 0.3);
            color: var(--primary);
            font-size: 0.84rem;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .section-title {
            font-size: clamp(1.85rem, 3vw, 2.55rem);
            margin-bottom: 18px;
            text-shadow: 0 0 28px rgba(13, 240, 163, 0.14);
        }

        .section-desc {
            color: var(--text-body);
            max-width: 780px;
            font-size: 1.02rem;
            margin-bottom: 44px;
        }

        /* 1. 首屏轮播与试用申请中心 (Hero Banner) */
        .hero-section {
            position: relative;
            padding: 76px 0 84px;
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid var(--border-subtle);
            overflow: hidden;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(105deg, rgba(11, 14, 20, 0.94) 0%, rgba(11, 14, 20, 0.85) 55%, rgba(18, 23, 34, 0.78) 100%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
        }

        .hero-h1 {
            font-size: clamp(2.1rem, 4vw, 3.25rem);
            font-weight: 800;
            line-height: 1.24;
            margin-bottom: 22px;
        }

        .text-gradient {
            background: linear-gradient(90deg, var(--primary) 0%, #68f7c8 50%, #b784f7 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .trial-privilege-box {
            background: rgba(18, 23, 34, 0.88);
            border: 1px solid var(--border-highlight);
            border-radius: var(--radius-lg);
            padding: 30px;
            box-shadow: var(--shadow-card), var(--shadow-neon);
            backdrop-filter: blur(12px);
        }

        .privilege-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: linear-gradient(90deg, var(--secondary), #9b4dff);
            color: #fff;
            padding: 4px 12px;
            border-radius: 6px;
            font-size: 0.8rem;
            font-weight: 700;
        }

        .qualification-list {
            list-style: none;
            padding: 0;
            margin: 18px 0 22px;
        }

        .qualification-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            margin-bottom: 11px;
            font-size: 0.93rem;
            color: var(--text-main);
        }

        .qualification-list li i {
            color: var(--primary);
            margin-top: 3px;
        }

        /* 卡片通用设计 */
        .cyber-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 28px;
            height: 100%;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .cyber-card:hover {
            transform: translateY(-5px);
            background: var(--bg-card-hover);
            border-color: var(--border-highlight);
            box-shadow: 0 18px 40px -10px rgba(0, 0, 0, 0.75), 0 0 20px rgba(13, 240, 163, 0.14);
        }

        .card-icon-wrap {
            width: 54px;
            height: 54px;
            border-radius: 12px;
            background: rgba(13, 240, 163, 0.1);
            border: 1px solid rgba(13, 240, 163, 0.28);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.5rem;
            margin-bottom: 20px;
        }

        /* 架构节点连接样式 */
        .arch-pipeline {
            position: relative;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
        }

        .arch-node {
            background: rgba(18, 23, 34, 0.9);
            border: 1px solid rgba(13, 240, 163, 0.35);
            border-radius: var(--radius-md);
            padding: 26px 22px;
            position: relative;
            box-shadow: 0 0 22px rgba(13, 240, 163, 0.08);
        }

        .arch-step-num {
            font-size: 0.78rem;
            font-weight: 800;
            color: #06120d;
            background: var(--primary);
            padding: 3px 10px;
            border-radius: 99px;
            display: inline-block;
            margin-bottom: 14px;
        }

        /* Tab 演示区 */
        .nav-pills-cyber .nav-link {
            background: var(--bg-card);
            color: var(--text-body);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            padding: 12px 22px;
            margin-right: 10px;
            margin-bottom: 10px;
            font-weight: 600;
            min-height: 46px;
            transition: var(--transition);
        }

        .nav-pills-cyber .nav-link.active {
            background: linear-gradient(135deg, rgba(13, 240, 163, 0.18), rgba(121, 40, 202, 0.22));
            color: var(--primary);
            border-color: var(--primary);
            box-shadow: var(--shadow-neon);
        }

        .stage-frame {
            background: #0d121b;
            border: 1px solid var(--border-highlight);
            border-radius: var(--radius-lg);
            padding: 18px;
            box-shadow: var(--shadow-card);
        }

        /* 统计看板 */
        .stats-bar {
            background: linear-gradient(90deg, #101724 0%, #171329 50%, #101724 100%);
            border-top: 1px solid rgba(13, 240, 163, 0.28);
            border-bottom: 1px solid rgba(13, 240, 163, 0.28);
            padding: 56px 0;
        }

        .stat-number {
            font-size: clamp(2.1rem, 3.5vw, 3rem);
            font-weight: 800;
            color: var(--primary);
            line-height: 1.15;
            margin-bottom: 6px;
            font-variant-numeric: tabular-nums;
        }

        /* 套餐卡片高亮 */
        .pricing-featured {
            border: 2px solid var(--primary);
            background: linear-gradient(180deg, rgba(13, 240, 163, 0.07) 0%, var(--bg-card) 38%);
            transform: scale(1.02);
        }

        .price-tag {
            font-size: 2.35rem;
            font-weight: 800;
            color: var(--text-main);
        }

        /* 手风琴 FAQ 定制 */
        .accordion-cyber .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 14px;
            overflow: hidden;
        }

        .accordion-cyber .accordion-button {
            background: var(--bg-card);
            color: var(--text-main);
            font-weight: 600;
            font-size: 1.04rem;
            padding: 20px 24px;
            box-shadow: none !important;
        }

        .accordion-cyber .accordion-button:not(.collapsed) {
            background: rgba(13, 240, 163, 0.08);
            color: var(--primary);
            border-bottom: 1px solid var(--border-subtle);
        }

        .accordion-cyber .accordion-button::after {
            filter: invert(1) brightness(200%);
        }

        .accordion-cyber .accordion-body {
            color: var(--text-body);
            padding: 20px 24px;
            line-height: 1.85;
        }

        /* 终极转化区 */
        .final-cta-section {
            background: linear-gradient(135deg, #0b161c 0%, #171029 55%, #091318 100%);
            position: relative;
            padding: 88px 0;
            border-bottom: 1px solid var(--border-subtle);
        }

        /* 页脚 */
        .site-footer {
            background: #07090e;
            padding: 72px 0 36px;
            color: var(--text-body);
            font-size: 0.92rem;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: var(--text-body);
            display: inline-flex;
            align-items: center;
            min-height: 32px;
        }

        .footer-links a:hover {
            color: var(--primary);
            transform: translateX(4px);
        }

        .form-control-cyber {
            background: rgba(11, 14, 20, 0.9);
            border: 1px solid rgba(255, 255, 255, 0.15);
            color: var(--text-main);
            min-height: 46px;
            border-radius: var(--radius-sm);
            padding: 10px 14px;
        }

        .form-control-cyber:focus {
            background: #0b0e14;
            border-color: var(--primary);
            color: var(--text-main);
            box-shadow: 0 0 0 3px rgba(13, 240, 163, 0.2);
        }

        /* 响应式适配 */
        @media (max-width: 1024px) {
            .arch-pipeline {
                grid-template-columns: repeat(2, 1fr);
            }
            .pricing-featured {
                transform: none;
            }
        }

        @media (max-width: 768px) {
            .section-block {
                padding: 64px 0;
            }
            .hero-section {
                padding: 52px 0 60px;
            }
            .arch-pipeline {
                grid-template-columns: 1fr;
            }
            .topbar-status .d-none-mobile {
                display: none !important;
            }
        }

        @media (max-width: 520px) {
            .hero-h1 {
                font-size: 1.85rem;
            }
            .trial-privilege-box {
                padding: 20px;
            }
            .btn-cyber, .btn-outline-cyber {
                width: 100%;
            }
        }