/* roulang page: index */
:root {
      --bg-dark: #060B16;
      --bg-gradient: linear-gradient(180deg, #060B16 0%, #0A1124 100%);
      --bg-card: rgba(13, 25, 48, 0.72);
      --border-color: rgba(0, 210, 255, 0.16);
      --border-hover: rgba(0, 210, 255, 0.45);
      --neon-cyan: #00D2FF;
      --neon-green: #00F5A0;
      --neon-purple: #7928CA;
      --text-main: #FFFFFF;
      --text-muted: #94A3B8;
      --text-dim: #64748B;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --glass-blur: blur(16px);
      --glow-shadow: 0 0 20px rgba(0, 210, 255, 0.28);
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      padding: 0;
      background-color: var(--bg-dark);
      background-image: radial-gradient(circle at 50% 0%, #101F42 0%, #060B16 75%);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    /* 顶部双行导航 */
    .header-master {
      position: sticky;
      top: 0;
      z-index: 1000;
      width: 100%;
      background: rgba(6, 11, 22, 0.88);
      backdrop-filter: var(--glass-blur);
      border-bottom: 1px solid var(--border-color);
    }
    .header-topbar {
      background: #03060D;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 12px;
      color: var(--text-dim);
      padding: 5px 0;
    }
    .header-topbar-flex {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .header-topbar a {
      color: var(--text-dim);
      text-decoration: none;
      margin-left: 15px;
      transition: color 0.2s;
    }
    .header-topbar a:hover { color: var(--neon-cyan); }
    .status-dot {
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: var(--neon-green);
      margin-right: 6px;
      box-shadow: 0 0 8px var(--neon-green);
    }

    .main-navbar {
      padding: 14px 0;
    }
    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
      color: #fff;
    }
    .brand-logo i {
      font-size: 26px;
      color: var(--neon-cyan);
      text-shadow: 0 0 10px rgba(0, 210, 255, 0.6);
    }
    .brand-logo span {
      font-size: 20px;
      font-weight: 800;
      letter-spacing: 0.5px;
      background: linear-gradient(90deg, #fff 0%, var(--neon-cyan) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .nav-menu {
      display: flex;
      list-style: none;
      margin: 0;
      padding: 0;
      gap: 22px;
    }
    .nav-menu li a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 15px;
      font-weight: 500;
      position: relative;
      padding: 6px 2px;
      transition: all 0.3s;
    }
    .nav-menu li a:hover, .nav-menu li a.active {
      color: #fff;
    }
    .nav-menu li a:hover::after, .nav-menu li a.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--neon-cyan);
      box-shadow: 0 0 8px var(--neon-cyan);
    }
    .nav-action {
      display: flex;
      align-items: center;
      gap: 14px;
    }

    /* 现代发光按钮 */
    .btn-glow {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      font-size: 15px;
      font-weight: 600;
      text-decoration: none;
      color: #fff;
      background: linear-gradient(135deg, var(--neon-cyan) 0%, var(--neon-purple) 100%);
      box-shadow: 0 0 15px rgba(0, 210, 255, 0.35);
      border: 1px solid rgba(255, 255, 255, 0.2);
      cursor: pointer;
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .btn-glow:hover {
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 0 25px rgba(0, 210, 255, 0.6);
      border-color: rgba(255, 255, 255, 0.4);
    }
    .btn-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 26px;
      border-radius: var(--radius-sm);
      font-size: 15px;
      font-weight: 600;
      text-decoration: none;
      color: #fff;
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.15);
      backdrop-filter: blur(8px);
      transition: all 0.3s;
    }
    .btn-secondary:hover {
      color: var(--neon-cyan);
      background: rgba(255, 255, 255, 0.12);
      border-color: var(--neon-cyan);
    }

    /* 通用板块规范 */
    .section-wrap {
      padding: 90px 0;
      position: relative;
    }
    .section-wrap.alt-bg {
      background: rgba(10, 17, 36, 0.45);
      border-top: 1px solid rgba(255, 255, 255, 0.03);
      border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    }
    .section-header {
      margin-bottom: 50px;
    }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      text-transform: uppercase;
      font-weight: 700;
      color: var(--neon-cyan);
      background: rgba(0, 210, 255, 0.08);
      border: 1px solid rgba(0, 210, 255, 0.2);
      padding: 4px 12px;
      border-radius: 20px;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 14px;
      line-height: 1.3;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto;
      line-height: 1.7;
    }

    /* 玻璃拟态卡片 */
    .glass-card {
      background: var(--bg-card);
      backdrop-filter: var(--glass-blur);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      height: 100%;
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
      position: relative;
      overflow: hidden;
    }
    .glass-card:hover {
      border-color: var(--border-hover);
      transform: translateY(-4px);
      box-shadow: var(--glow-shadow);
    }

    /* 1. Hero 蓝图：直播预告封面 + 开播倒计时 + 提醒订阅 */
    .hero-live-section {
      padding: 80px 0 100px;
      background: url('/assets/images/6843858c922d65a9.webp') center center/cover no-repeat;
      position: relative;
    }
    .hero-live-section::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(6, 11, 22, 0.85) 0%, rgba(6, 11, 22, 0.96) 100%);
    }
    .hero-container {
      position: relative;
      z-index: 2;
    }
    .hero-live-box {
      background: rgba(13, 25, 48, 0.85);
      border: 1px solid rgba(0, 210, 255, 0.25);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
      backdrop-filter: var(--glass-blur);
    }
    .live-badge-row {
      display: flex;
      align-items: center;
      gap: 15px;
      margin-bottom: 20px;
    }
    .live-pulsing-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(239, 68, 68, 0.15);
      border: 1px solid rgba(239, 68, 68, 0.4);
      color: #EF4444;
      padding: 5px 14px;
      border-radius: 30px;
      font-size: 13px;
      font-weight: 700;
    }
    .live-pulsing-badge .dot {
      width: 8px;
      height: 8px;
      background: #EF4444;
      border-radius: 50%;
      animation: pulseAnim 1.5s infinite;
    }
    @keyframes pulseAnim {
      0% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(1.3); }
      100% { opacity: 1; transform: scale(1); }
    }
    .countdown-widget {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      background: rgba(0, 210, 255, 0.08);
      border: 1px solid rgba(0, 210, 255, 0.2);
      border-radius: var(--radius-sm);
      padding: 8px 18px;
    }
    .countdown-num {
      font-size: 20px;
      font-weight: 800;
      color: var(--neon-cyan);
      font-family: monospace;
    }
    .hero-h1 {
      font-size: 42px;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 20px;
      color: #fff;
    }
    .hero-h1 span {
      background: linear-gradient(90deg, #00D2FF 0%, #00F5A0 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-lead-text {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 30px;
    }
    .hero-cover-preview {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid rgba(0, 210, 255, 0.3);
      position: relative;
      box-shadow: 0 10px 30px rgba(0,0,0,0.4);
    }
    .hero-cover-preview img {
      width: 100%;
      height: 280px;
      object-fit: cover;
      display: block;
      transition: transform 0.5s;
    }
    .hero-cover-preview:hover img {
      transform: scale(1.03);
    }
    .stream-overlay-tag {
      position: absolute;
      bottom: 12px;
      left: 12px;
      right: 12px;
      background: rgba(6, 11, 22, 0.85);
      backdrop-filter: blur(8px);
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      font-size: 13px;
      color: #fff;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    /* 2. 技术参数与双列架构 */
    .specs-metric-box {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      margin-top: 24px;
    }
    .spec-item {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.08);
      padding: 16px;
      border-radius: var(--radius-sm);
    }
    .spec-item .val {
      font-size: 22px;
      font-weight: 700;
      color: var(--neon-cyan);
      display: block;
      margin-bottom: 4px;
    }
    .spec-item .desc {
      font-size: 13px;
      color: var(--text-dim);
    }

    /* 3. 核心优势矩阵 */
    .advantage-icon {
      width: 50px;
      height: 50px;
      border-radius: 12px;
      background: rgba(0, 210, 255, 0.1);
      border: 1px solid rgba(0, 210, 255, 0.25);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      color: var(--neon-cyan);
      margin-bottom: 18px;
    }

    /* 4. 合集目录板块 (Blueprint Step 2) */
    .catalog-item-card {
      background: rgba(13, 25, 48, 0.6);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      display: flex;
      gap: 18px;
      margin-bottom: 18px;
      align-items: center;
      transition: all 0.3s;
    }
    .catalog-item-card:hover {
      border-color: var(--neon-cyan);
      transform: translateX(6px);
      background: rgba(13, 25, 48, 0.9);
    }
    .catalog-thumb {
      width: 130px;
      height: 80px;
      border-radius: var(--radius-sm);
      overflow: hidden;
      flex-shrink: 0;
    }
    .catalog-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .catalog-meta h4 {
      font-size: 18px;
      margin: 0 0 6px;
      color: #fff;
    }
    .catalog-meta p {
      font-size: 13px;
      color: var(--text-muted);
      margin: 0 0 8px;
      line-height: 1.5;
    }
    .catalog-tags span {
      font-size: 12px;
      padding: 2px 8px;
      border-radius: 4px;
      background: rgba(255,255,255,0.06);
      color: var(--neon-green);
      margin-right: 8px;
    }

    /* 5. 对比选型表 */
    .benchmark-table {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      background: rgba(13, 25, 48, 0.7);
    }
    .benchmark-table th, .benchmark-table td {
      padding: 16px 20px;
      text-align: left;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 14px;
    }
    .benchmark-table th {
      background: rgba(16, 31, 66, 0.8);
      color: #fff;
      font-weight: 600;
    }
    .benchmark-table tr:last-child td {
      border-bottom: none;
    }
    .benchmark-table .highlight-col {
      background: rgba(0, 210, 255, 0.05);
      color: var(--neon-cyan);
      font-weight: 600;
    }

    /* 6. 里程碑时间线 (Milestone) */
    .timeline-stream {
      position: relative;
      padding: 20px 0;
    }
    .timeline-stream::before {
      content: '';
      position: absolute;
      top: 0;
      bottom: 0;
      left: 50%;
      width: 2px;
      background: linear-gradient(180deg, var(--neon-cyan) 0%, var(--neon-purple) 100%);
      transform: translateX(-50%);
    }
    .timeline-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 40px;
      position: relative;
    }
    .timeline-content-left, .timeline-content-right {
      width: 45%;
    }
    .timeline-badge {
      position: absolute;
      left: 50%;
      transform: translateX(-50%);
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: #0A1124;
      border: 2px solid var(--neon-cyan);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--neon-cyan);
      font-size: 14px;
      z-index: 2;
      box-shadow: 0 0 10px rgba(0, 210, 255, 0.5);
    }

    /* 7. 创作者故事与案例推荐 (Blueprint Step 3) */
    .story-card-wrapper {
      position: relative;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      background: var(--bg-card);
    }
    .story-img {
      height: 200px;
      width: 100%;
      object-fit: cover;
      display: block;
    }
    .story-body {
      padding: 24px;
    }

    /* 8. 数据大屏指标看板 */
    .metrics-banner {
      background: linear-gradient(90deg, #091329 0%, #112048 50%, #091329 100%);
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 60px 0;
    }
    .metric-counter-col {
      text-align: center;
      padding: 10px 20px;
    }
    .metric-big-num {
      font-size: 44px;
      font-weight: 800;
      background: linear-gradient(180deg, #FFFFFF 0%, var(--neon-cyan) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: block;
      margin-bottom: 6px;
    }
    .metric-label {
      font-size: 15px;
      color: var(--text-muted);
    }

    /* 9. 资讯与行业前沿 (Blueprint Step 4) */
    .news-card-thumb {
      height: 160px;
      border-radius: var(--radius-sm);
      overflow: hidden;
      margin-bottom: 16px;
    }
    .news-card-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    /* 10. 专题索引与分类 (Blueprint Step 6) */
    .topic-index-badge {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 16px 20px;
      border-radius: var(--radius-sm);
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.07);
      text-decoration: none;
      color: #fff;
      transition: all 0.3s;
    }
    .topic-index-badge:hover {
      background: rgba(0, 210, 255, 0.08);
      border-color: var(--neon-cyan);
      color: var(--neon-cyan);
      transform: translateY(-2px);
    }
    .topic-icon {
      font-size: 20px;
      color: var(--neon-cyan);
    }

    /* 11. 用户口碑评价墙 (Blueprint Step 7) */
    .testimonial-avatar {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      border: 2px solid var(--neon-cyan);
      display: flex;
      align-items: center;
      justify-content: center;
      background: rgba(0, 210, 255, 0.1);
      color: var(--neon-cyan);
      font-size: 20px;
      flex-shrink: 0;
    }

    /* 12. 算力保障与高并发转化表单 */
    .conversion-panel {
      background: rgba(13, 25, 48, 0.85);
      border: 1px solid var(--border-hover);
      box-shadow: 0 0 30px rgba(0, 210, 255, 0.2);
      border-radius: var(--radius-lg);
      padding: 40px;
    }
    .input-dark {
      background: rgba(6, 11, 22, 0.8) !important;
      border: 1px solid rgba(255, 255, 255, 0.15) !important;
      color: #fff !important;
      border-radius: var(--radius-sm) !important;
      height: 46px !important;
      padding: 0 16px !important;
      margin-bottom: 18px !important;
      font-size: 14px;
    }
    .input-dark:focus {
      border-color: var(--neon-cyan) !important;
      box-shadow: 0 0 10px rgba(0, 210, 255, 0.3) !important;
    }

    /* 全局页脚 */
    .footer-master {
      background: #03060D;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 70px 0 30px;
      color: var(--text-dim);
      font-size: 14px;
    }
    .footer-heading {
      color: #fff;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 20px;
    }
    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-links li {
      margin-bottom: 10px;    }
    .footer-links a {
      color: var(--text-dim);
      text-decoration: none;
      transition: color 0.2s;
    }
    .footer-links a:hover {
      color: var(--neon-cyan);
    }
    .footer-bottom {
      margin-top: 50px;
      padding-top: 25px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 15px;
    }

    /* 移动端与自适应调整 */
    @media (max-width: 1024px) {
      .hero-h1 { font-size: 34px; }
      .timeline-stream::before { left: 24px; }
      .timeline-badge { left: 24px; }
      .timeline-row { flex-direction: column; align-items: flex-start; }
      .timeline-content-left, .timeline-content-right { width: calc(100% - 60px); margin-left: 60px; }
      .timeline-content-left { margin-bottom: 24px; }
    }
    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .header-topbar-flex { flex-direction: column; gap: 4px; text-align: center; }
      .section-wrap { padding: 60px 0; }
      .hero-h1 { font-size: 28px; }
      .hero-live-box { padding: 24px; }
      .conversion-panel { padding: 24px; }
      .specs-metric-box { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; text-align: center; }
    }