/* roulang page: index */
:root {
      --bg-dark: #060b18;
      --bg-deep: #0a1124;
      --bg-surface: rgba(15, 23, 42, 0.72);
      --bg-surface-light: rgba(30, 41, 59, 0.52);
      --border-line: rgba(56, 189, 248, 0.2);
      --border-hover: rgba(56, 189, 248, 0.55);
      --primary-cyan: #00f2fe;
      --primary-blue: #38bdf8;
      --accent-glow: #0284c7;
      --text-main: #f8fafc;
      --text-sub: #cbd5e1;
      --text-muted: #94a3b8;
      --font-stack: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: var(--font-stack);
      line-height: 1.75;
      letter-spacing: 0.02em;
    }

    body {
      background: radial-gradient(circle at 50% 0%, #0d1b38 0%, #060b18 70%);
      overflow-x: hidden;
      min-height: 100vh;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部通告条与主导航 */
    .top-bar {
      height: 38px;
      background: rgba(4, 8, 18, 0.95);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 13px;
      color: var(--text-muted);
      display: flex;
      align-items: center;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .badge-status {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: #34d399;
    }
    .badge-dot {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background-color: #34d399;
      box-shadow: 0 0 8px #34d399;
      animation: pulse 2s infinite;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 99;
      background: rgba(6, 11, 24, 0.88);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-line);
      height: 74px;
      display: flex;
      align-items: center;
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 700;
      color: #fff;
    }
    .brand-icon {
      width: 32px;
      height: 32px;
      border-radius: 8px;
      background: linear-gradient(135deg, var(--primary-cyan), #2563eb);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      color: #fff;
      font-weight: 900;
      box-shadow: 0 0 12px rgba(0, 242, 254, 0.5);
    }
    .nav-menu {
      display: flex;
      list-style: none;
      gap: 28px;
      align-items: center;
    }
    .nav-menu a {
      color: var(--text-sub);
      font-size: 15px;
      font-weight: 500;
      padding: 6px 0;
      position: relative;
    }
    .nav-menu a:hover, .nav-menu a.active {
      color: var(--primary-cyan);
    }
    .nav-menu a:hover::after, .nav-menu a.active::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--primary-cyan);
      box-shadow: 0 0 8px var(--primary-cyan);
    }

    /* 通用发光按钮 */
    .btn-glow {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 28px;
      border-radius: 9999px;
      background: linear-gradient(135deg, #0284c7 0%, #2563eb 100%);
      color: #fff;
      font-size: 15px;
      font-weight: 600;
      border: 1px solid rgba(255, 255, 255, 0.2);
      box-shadow: 0 0 20px rgba(14, 165, 233, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.25);
      cursor: pointer;
      white-space: nowrap;
    }
    .btn-glow:hover {
      box-shadow: 0 0 30px rgba(56, 189, 248, 0.75);
      transform: scale(1.02);
      color: #fff;
    }
    .btn-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      border-radius: 9999px;
      background: rgba(15, 23, 42, 0.6);
      color: var(--primary-blue);
      border: 1px solid var(--border-line);
      font-size: 15px;
      font-weight: 600;
      backdrop-filter: blur(12px);
    }
    .btn-secondary:hover {
      background: rgba(56, 189, 248, 0.15);
      border-color: var(--primary-blue);
      color: #fff;
    }

    /* 板块通用 */
    section {
      padding: 96px 0;
      position: relative;
    }
    .section-alt {
      background: linear-gradient(180deg, rgba(8, 14, 30, 0.8) 0%, rgba(5, 9, 20, 0.9) 100%);
      border-top: 1px solid rgba(255, 255, 255, 0.04);
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    }
    .section-header {
      margin-bottom: 56px;
      text-align: center;
    }
    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      border-radius: 20px;
      background: rgba(56, 189, 248, 0.1);
      border: 1px solid var(--border-line);
      color: var(--primary-cyan);
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 14px;
      text-transform: uppercase;
    }
    .section-title {
      font-size: 34px;
      font-weight: 800;
      line-height: 1.35;
      margin-bottom: 16px;
      background: linear-gradient(180deg, #ffffff 0%, #cbd5e1 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-sub);
      max-width: 780px;
      margin: 0 auto;
    }

    /* 玻璃拟态卡片 */
    .glass-card {
      background: var(--bg-surface);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 16px;
      padding: 32px;
      box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }
    .glass-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(56, 189, 248, 0.4), transparent);
    }
    .glass-card:hover {
      border-color: var(--border-hover);
      box-shadow: 0 12px 40px 0 rgba(0, 242, 254, 0.18);
      transform: translateY(-4px);
    }

    /* 网格辅助 */
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    /* 1. 首屏 Hero */
    .hero-section {
      padding: 110px 0 90px;
      background: url('/assets/images/bfe762f7465a9ee2.webp') center/cover no-repeat;
      position: relative;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 60% 30%, rgba(6, 11, 24, 0.75) 0%, rgba(6, 11, 24, 0.96) 80%);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 860px;
      margin: 0 auto;
      text-align: center;
    }
    .hero-title {
      font-size: 46px;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 24px;
      color: #fff;
    }
    .hero-desc {
      font-size: 17px;
      color: var(--text-sub);
      margin-bottom: 36px;
      line-height: 1.8;
    }
    .hero-reward-card {
      background: rgba(15, 23, 42, 0.85);
      border: 1px solid var(--border-line);
      border-radius: 20px;
      padding: 24px 32px;
      margin: 32px auto 0;
      max-width: 640px;
      box-shadow: 0 16px 36px rgba(0, 0, 0, 0.5);
    }
    .progress-bar-wrap {
      width: 100%;
      height: 8px;
      background: rgba(255, 255, 255, 0.1);
      border-radius: 99px;
      margin: 14px 0 10px;
      overflow: hidden;
    }
    .progress-bar-fill {
      width: 78%;
      height: 100%;
      background: linear-gradient(90deg, var(--primary-cyan), #3b82f6);
      box-shadow: 0 0 10px var(--primary-cyan);
    }
    .reward-meta {
      display: flex;
      justify-content: space-between;
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 2. 内容日历 */
    .calendar-card {
      border-left: 3px solid var(--primary-blue);
      padding: 20px;
      background: rgba(15, 23, 42, 0.5);
      margin-bottom: 16px;
      border-radius: 0 12px 12px 0;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .calendar-date {
      font-family: monospace;
      font-size: 14px;
      color: var(--primary-cyan);
      background: rgba(0, 242, 254, 0.08);
      padding: 4px 10px;
      border-radius: 6px;
      white-space: nowrap;
    }

    /* 3. 痛点破局对比 */
    .card-pain {
      border-top: 2px solid #ef4444;
      background: rgba(30, 15, 20, 0.5);
    }
    .card-solution {
      border-top: 2px solid #00f2fe;
      background: rgba(12, 28, 48, 0.6);
    }

    /* 4. 底层架构微展示 */
    .arch-item {
      display: flex;
      gap: 16px;
      margin-bottom: 24px;
    }
    .arch-number {
      font-size: 24px;
      font-weight: 800;
      color: var(--primary-cyan);
      font-family: monospace;
      line-height: 1;
    }

    /* 5. 热门专题矩阵 */
    .topic-img-wrap {
      border-radius: 12px;
      overflow: hidden;
      margin-bottom: 20px;
      height: 200px;
      position: relative;
    }
    .topic-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .glass-card:hover .topic-img-wrap img {
      transform: scale(1.06);
    }

    /* 6. 前后对比 */
    .compare-box {
      display: grid;
      grid-template-columns: 1fr 1fr;
      border-radius: 16px;
      overflow: hidden;
      border: 1px solid var(--border-line);
    }
    .compare-side {
      padding: 36px;
    }
    .compare-side.before {
      background: rgba(15, 23, 42, 0.4);
      border-right: 1px solid rgba(255, 255, 255, 0.08);
    }
    .compare-side.after {
      background: rgba(14, 165, 233, 0.06);
    }

    /* 7. 观点解读 */
    .quote-box {
      border-left: 4px solid var(--primary-cyan);
      padding: 20px 24px;
      background: rgba(15, 23, 42, 0.6);
      margin-top: 20px;
      font-style: italic;
      color: var(--text-sub);
    }

    /* 8. 资讯摘要 */
    .news-badge {
      font-size: 12px;
      padding: 2px 8px;
      border-radius: 4px;
      background: rgba(56, 189, 248, 0.15);
      color: var(--primary-blue);
    }

    /* 9. 媒体精选与评价 */
    .media-avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      border: 2px solid var(--primary-cyan);
      object-fit: cover;
    }

    /* 10. 数据指标条 */
    .metric-value {
      font-size: 44px;
      font-weight: 800;
      font-family: monospace;
      color: #fff;
      margin-bottom: 6px;
      text-shadow: 0 0 20px rgba(56, 189, 248, 0.5);
    }

    /* 11. 误区澄清 */
    .mistake-list dt {
      color: #f87171;
      font-weight: 600;
      margin-top: 14px;
    }
    .mistake-list dd {
      color: var(--text-sub);
      margin-left: 0;
      margin-bottom: 12px;
      font-size: 14px;
    }

    /* 12. 平台保障 */
    .guarantee-icon {
      font-size: 28px;
      color: var(--primary-cyan);
      margin-bottom: 14px;
    }

    /* 13. FAQ 手风琴 */
    .faq-container {
      max-width: 820px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: var(--bg-surface);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 12px;
      overflow: hidden;
    }
    .faq-trigger {
      padding: 20px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 600;
      font-size: 16px;
      color: var(--text-main);
      user-select: none;
    }
    .faq-trigger:hover {
      color: var(--primary-cyan);
    }
    .faq-content {
      padding: 0 24px 20px;
      color: var(--text-sub);
      font-size: 14px;
      line-height: 1.8;
      display: none;
    }
    .faq-item.active .faq-content {
      display: block;
    }
    .faq-item.active {
      border-color: var(--border-hover);
    }
    .faq-icon {
      font-size: 18px;
      transition: transform 0.3s ease;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    /* 14. 终极转化 CTA */
    .cta-container {
      background: radial-gradient(circle at center, rgba(14, 165, 233, 0.25) 0%, rgba(6, 11, 24, 0.95) 70%);
      border: 1px solid var(--border-hover);
      border-radius: 24px;
      padding: 64px 32px;
      text-align: center;
      box-shadow: 0 0 50px rgba(14, 165, 233, 0.2);
    }

    /* 页脚 */
    .site-footer {
      background: #03060f;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 64px 0 28px;
      font-size: 14px;
      color: var(--text-muted);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 48px;
    }
    .footer-title {
      font-size: 15px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: var(--primary-cyan);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
    }

    /* 移动端菜单抽屉 */
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      color: #fff;
      font-size: 24px;
      cursor: pointer;
    }

    @keyframes pulse {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.4; }
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .grid-3, .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .top-bar { display: none; }
      .nav-menu { display: none; }
      .mobile-toggle { display: block; }
      .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
      }
      .compare-box {
        grid-template-columns: 1fr;
      }
      .compare-side.before {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      }
      .hero-title {
        font-size: 30px;
      }
      .section-title {
        font-size: 26px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      section {
        padding: 64px 0;
      }
    }