/* roulang page: index */
:root {
            --bg-pitch: #0A0F14;
            --bg-surface: #121A24;
            --bg-surface-elevated: #182230;
            --color-volt: #00FF87;
            --color-volt-hover: #10e07b;
            --color-cyan: #00D8F6;
            --color-coral: #FF4D4D;
            --text-primary: #F1F5F9;
            --text-secondary: #94A3B8;
            --text-dim: #64748B;
            --border-glow: rgba(0, 255, 135, 0.16);
            --border-cyan: rgba(0, 216, 246, 0.22);
            --border-subtle: rgba(255, 255, 255, 0.08);
            --radius-sm: 4px;
            --radius-md: 6px;
            --radius-lg: 10px;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            background-color: var(--bg-pitch);
            color: var(--text-primary);
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            line-height: 1.65;
            overflow-x: hidden;
            letter-spacing: 0.01em;
        }

        .data-mono {
            font-family: "DIN Alternate", "Roboto Mono", SFMono-Regular, Menlo, Monaco, monospace;
        }

        /* 统一平滑锚点偏移量 */
        section {
            scroll-margin-top: 104px;
        }

        /* 顶部微型活动状态栏 */
        .top-subbar {
            background-color: #05080B;
            border-bottom: 1px solid var(--border-subtle);
            font-size: 0.78rem;
            color: var(--text-secondary);
            height: 38px;
            display: flex;
            align-items: center;
        }

        .status-dot-pulse {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--color-volt);
            box-shadow: 0 0 10px var(--color-volt);
            display: inline-block;
            margin-right: 8px;
            animation: pulse-dot 1.8s infinite;
        }

        @keyframes pulse-dot {
            0% { transform: scale(0.95); opacity: 0.8; }
            50% { transform: scale(1.2); opacity: 1; }
            100% { transform: scale(0.95); opacity: 0.8; }
        }

        .event-timeline-chips {
            display: inline-flex;
            gap: 6px;
            align-items: center;
        }

        .event-chip {
            padding: 2px 8px;
            border-radius: 3px;
            font-size: 0.72rem;
            font-weight: 500;
            text-decoration: none;
            transition: all 0.2s ease;
        }

        .event-chip.active {
            background: rgba(0, 255, 135, 0.15);
            border: 1px solid var(--color-volt);
            color: var(--color-volt);
        }

        .event-chip.idle {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-subtle);
            color: var(--text-secondary);
        }

        /* 主导航 */
        .main-navbar {
            background-color: rgba(10, 15, 20, 0.92);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-subtle);
            position: sticky;
            top: 0;
            z-index: 1030;
            transition: background 0.3s ease;
        }

        .brand-logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
        }

        .brand-glyph {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--color-volt), var(--color-cyan));
            border-radius: 4px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #05080B;
            font-weight: 900;
            font-size: 1.1rem;
        }

        .brand-title {
            color: var(--text-primary);
            font-weight: 700;
            font-size: 1.12rem;
            letter-spacing: 0.03em;
        }

        .brand-title span {
            color: var(--color-volt);
            font-weight: 800;
        }

        .nav-link-tech {
            color: var(--text-secondary);
            font-size: 0.92rem;
            font-weight: 500;
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            transition: all 0.25s ease;
            text-decoration: none;
        }

        .nav-link-tech:hover,
        .nav-link-tech.active {
            color: var(--color-volt);
            background: rgba(0, 255, 135, 0.06);
        }

        .btn-volt {
            background-color: var(--color-volt);
            color: #05080B;
            font-weight: 700;
            border-radius: var(--radius-sm);
            padding: 9px 20px;
            font-size: 0.92rem;
            border: 1px solid var(--color-volt);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            transition: all 0.25s ease;
        }

        .btn-volt:hover {
            background-color: var(--color-volt-hover);
            color: #000;
            box-shadow: 0 0 20px rgba(0, 255, 135, 0.35);
        }

        .btn-outline-cyan {
            background: transparent;
            color: var(--color-cyan);
            border: 1px solid var(--color-cyan);
            border-radius: var(--radius-sm);
            padding: 9px 20px;
            font-size: 0.92rem;
            font-weight: 600;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            transition: all 0.25s ease;
        }

        .btn-outline-cyan:hover {
            background: rgba(0, 216, 246, 0.1);
            color: #fff;
            box-shadow: 0 0 16px rgba(0, 216, 246, 0.25);
        }

        /* 结构区块规范样式 */
        .section-padding {
            padding: 88px 0;
            position: relative;
        }

        .section-alt {
            background-color: #0E151E;
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .section-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.12em;
            color: var(--color-volt);
            background: rgba(0, 255, 135, 0.1);
            border: 1px solid rgba(0, 255, 135, 0.24);
            padding: 4px 12px;
            border-radius: 2px;
            margin-bottom: 14px;
        }

        .section-title {
            font-size: 2.15rem;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .section-lead {
            color: var(--text-secondary);
            font-size: 1.04rem;
            max-width: 780px;
            margin-bottom: 40px;
        }

        /* 赛场机能卡片系统 */
        .tech-card {
            background-color: var(--bg-surface);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 28px;
            height: 100%;
            transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .tech-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, transparent, rgba(0, 255, 135, 0), transparent);
            transition: background 0.3s ease;
        }

        .tech-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 255, 135, 0.4);
            box-shadow: 0 16px 36px rgba(0, 0, 0, 0.5), 0 0 20px rgba(0, 255, 135, 0.08);
            background-color: var(--bg-surface-elevated);
        }

        .tech-card:hover::before {
            background: linear-gradient(90deg, transparent, var(--color-volt), transparent);
        }

        .card-icon-box {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: rgba(0, 216, 246, 0.08);
            border: 1px solid var(--border-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            color: var(--color-cyan);
        }

        /* 首屏 Hero 大图叙事 */
        .hero-banner-narrative {
            min-height: 88vh;
            position: relative;
            display: flex;
            align-items: center;
            background: radial-gradient(circle at 75% 30%, rgba(0, 216, 246, 0.12), transparent 45%),
                        radial-gradient(circle at 20% 80%, rgba(0, 255, 135, 0.08), transparent 40%),
                        linear-gradient(180deg, #070B0E 0%, #0A0F14 100%);
            border-bottom: 1px solid var(--border-subtle);
            padding: 80px 0 60px;
        }

        .hero-backdrop-img {
            position: absolute;
            right: 0;
            top: 0;
            width: 55%;
            height: 100%;
            object-fit: cover;
            opacity: 0.22;
            mask-image: linear-gradient(to left, rgba(0,0,0,1) 0%, rgba(0,0,0,0) 95%);
            -webkit-mask-image: linear-gradient(to left, rgba(0,0,0,1) 0%, rgba(0,0,0,0) 95%);
            pointer-events: none;
            z-index: 1;
        }

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

        .hero-h1 {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.18;
            margin-bottom: 24px;
            letter-spacing: -0.02em;
        }

        .hero-h1 .gradient-text {
            background: linear-gradient(135deg, #FFFFFF 30%, var(--color-volt) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 1.14rem;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 660px;
            margin-bottom: 34px;
        }

        .hero-live-telemetry {
            background: rgba(18, 26, 36, 0.7);
            border: 1px solid var(--border-cyan);
            border-radius: var(--radius-md);
            padding: 20px;
            backdrop-filter: blur(10px);
        }

        .telemetry-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 8px 0;
            border-bottom: 1px dashed rgba(255, 255, 255, 0.08);
            font-size: 0.88rem;
        }

        .telemetry-row:last-child {
            border-bottom: none;
        }

        /* 参数表组件样式 */
        .specs-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-surface);
        }

        .specs-table th {
            background: #16222F;
            color: var(--color-cyan);
            padding: 16px 20px;
            font-weight: 600;
            font-size: 0.95rem;
            border-bottom: 1px solid var(--border-subtle);
        }

        .specs-table td {
            padding: 16px 20px;
            color: var(--text-secondary);
            border-bottom: 1px solid var(--border-subtle);
            font-size: 0.92rem;
        }

        .specs-table tr:last-child td {
            border-bottom: none;
        }

        .specs-table tr:hover td {
            background: rgba(0, 255, 135, 0.03);
            color: var(--text-primary);
        }

        /* 战术复盘现场沉浸区 */
        .dark-field-box {
            background: #06090D;
            border: 1px solid rgba(0, 216, 246, 0.25);
            border-radius: var(--radius-lg);
            position: relative;
            padding: 36px;
            background-image: radial-gradient(rgba(0, 216, 246, 0.06) 1px, transparent 1px);
            background-size: 24px 24px;
        }

        /* 交付流程时间线 */
        .workflow-step {
            position: relative;
            padding: 24px;
            background: var(--bg-surface);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            height: 100%;
        }

        .workflow-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-volt);
            line-height: 1;
            margin-bottom: 12px;
            opacity: 0.85;
        }

        /* 关键数据计数区 */
        .metric-big-num {
            font-size: 3.2rem;
            font-weight: 800;
            color: var(--color-volt);
            line-height: 1.1;
            margin-bottom: 6px;
        }

        /* FAQ 手风琴重构 */
        .accordion-tech .accordion-item {
            background-color: var(--bg-surface);
            border: 1px solid var(--border-subtle);
            margin-bottom: 12px;
            border-radius: var(--radius-sm) !important;
            overflow: hidden;
        }

        .accordion-tech .accordion-button {
            background-color: var(--bg-surface);
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1.05rem;
            padding: 20px 24px;
            box-shadow: none;
        }

        .accordion-tech .accordion-button:not(.collapsed) {
            color: var(--color-volt);
            background-color: #162230;
            border-left: 3px solid var(--color-volt);
        }

        .accordion-tech .accordion-button::after {
            filter: invert(1);
        }

        .accordion-tech .accordion-body {
            background-color: #121922;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.8;
            padding: 20px 24px;
            border-top: 1px solid var(--border-subtle);
        }

        /* 预约演示表单 */
        .form-tech-input {
            background-color: #0E151E;
            border: 1px solid var(--border-subtle);
            color: var(--text-primary);
            border-radius: var(--radius-sm);
            padding: 12px 16px;
            font-size: 0.95rem;
            transition: all 0.25s ease;
        }

        .form-tech-input:focus {
            background-color: #131C28;
            border-color: var(--color-volt);
            box-shadow: 0 0 0 0.25rem rgba(0, 255, 135, 0.18);
            color: #fff;
        }

        /* 页脚规范 */
        .site-footer {
            background-color: #06090D;
            border-top: 1px solid var(--border-subtle);
            padding: 70px 0 30px;
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        .footer-brand {
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            display: inline-block;
            text-decoration: none;
        }

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

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

        .footer-link-group a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color 0.2s ease;
        }

        .footer-link-group a:hover {
            color: var(--color-volt);
        }

        .footer-bottom {
            margin-top: 50px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 0.82rem;
            color: var(--text-dim);
        }

        /* 响应式断点优化 */
        @media (max-width: 991px) {
            .hero-h1 {
                font-size: 2.4rem;
            }
            .hero-backdrop-img {
                opacity: 0.12;
                width: 100%;
            }
            .section-padding {
                padding: 60px 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 576px) {
            .hero-h1 {
                font-size: 1.95rem;
            }
            .metric-big-num {
                font-size: 2.4rem;
            }
            .top-subbar {
                height: auto;
                padding: 8px 0;
            }
        }