/* roulang page: index */
:root {
      --bg-dark: #0a0d14;
      --bg-card: #121824;
      --bg-card-hover: #1a2334;
      --border-color: #222e44;
      --border-accent: #334466;
      --text-main: #f0f4fc;
      --text-muted: #8b9bb4;
      --text-dim: #5c6b84;
      --accent-color: #3b82f6;
      --accent-hover: #2563eb;
      --accent-glow: rgba(59, 130, 246, 0.15);
      --danger: #ef4444;
      --success: #10b981;
      --warning: #f59e0b;
      --code-bg: #06080d;
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 18px;
      --radius-full: 9999px;
      --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: var(--font-stack);
      line-height: 1.6;
      font-size: 15px;
      overflow-x: hidden;
    }

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

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

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 悬浮胶囊导航 */
    .header-wrapper {
      position: fixed;
      top: 18px;
      left: 0;
      width: 100%;
      z-index: 1000;
      display: flex;
      justify-content: center;
      pointer-events: none;
      padding: 0 16px;
    }

    .nav-capsule {
      pointer-events: auto;
      background: rgba(18, 24, 36, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-full);
      padding: 8px 14px 8px 22px;
      display: flex;
      align-items: center;
      gap: 28px;
      box-shadow: 0 8px 30px rgba(0, 0, 0, 0.45);
      max-width: 900px;
      width: 100%;
      justify-content: space-between;
    }

    .nav-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.15rem;
      letter-spacing: -0.02em;
      color: #fff;
    }

    .nav-brand .brand-badge {
      background: linear-gradient(135deg, #3b82f6, #1d4ed8);
      color: #fff;
      font-size: 11px;
      padding: 2px 7px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      text-transform: uppercase;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 20px;
      list-style: none;
    }

    .nav-menu a {
      color: var(--text-muted);
      font-size: 0.92rem;
      font-weight: 500;
    }

    .nav-menu a:hover,
    .nav-menu a.active {
      color: #fff;
    }

    .nav-btn {
      background: var(--accent-color);
      color: #fff;
      padding: 8px 18px;
      border-radius: var(--radius-full);
      font-size: 0.88rem;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      border: 1px solid rgba(255, 255, 255, 0.15);
    }

    .nav-btn:hover {
      background: var(--accent-hover);
      box-shadow: 0 0 16px rgba(59, 130, 246, 0.4);
    }

    /* 板块通用规范 */
    section {
      padding: 88px 0;
      position: relative;
    }

    section.alt-bg {
      background-color: #0d121c;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .section-head {
      margin-bottom: 48px;
      max-width: 720px;
    }

    .section-tag {
      display: inline-block;
      color: var(--accent-color);
      font-size: 0.85rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      margin-bottom: 10px;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      color: #fff;
      line-height: 1.3;
      margin-bottom: 16px;
      letter-spacing: -0.02em;
    }

    .section-desc {
      color: var(--text-muted);
      font-size: 1.02rem;
      line-height: 1.7;
    }

    /* 1. Hero 开发者/API风格首屏 */
    .hero-section {
      padding-top: 160px;
      padding-bottom: 96px;
      background: radial-gradient(circle at 50% 0%, rgba(59, 130, 246, 0.12) 0%, transparent 60%);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }

    .hero-content h1 {
      font-size: 2.9rem;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 24px;
      letter-spacing: -0.03em;
      color: #fff;
    }

    .hero-content p {
      font-size: 1.08rem;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 34px;
    }

    .hero-actions {
      display: flex;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn-main {
      background: var(--accent-color);
      color: #fff;
      padding: 13px 28px;
      border-radius: var(--radius-md);
      font-weight: 600;
      font-size: 1rem;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .btn-main:hover {
      background: var(--accent-hover);
      box-shadow: 0 0 20px rgba(59, 130, 246, 0.4);
    }

    .btn-secondary {
      background: #192233;
      color: var(--text-main);
      border: 1px solid var(--border-color);
      padding: 13px 24px;
      border-radius: var(--radius-md);
      font-weight: 600;
      font-size: 1rem;
    }

    .btn-secondary:hover {
      background: #222f46;
      border-color: var(--border-accent);
    }

    .code-terminal {
      background: var(--code-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
    }

    .terminal-bar {
      background: #0f1420;
      padding: 12px 18px;
      display: flex;
      align-items: center;
      gap: 8px;
      border-bottom: 1px solid var(--border-color);
    }

    .terminal-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
    }
    .dot-red { background: #ff5f56; }
    .dot-yellow { background: #ffbd2e; }
    .dot-green { background: #27c93f; }
    .terminal-title {
      font-family: monospace;
      font-size: 12px;
      color: var(--text-dim);
      margin-left: 10px;
    }

    .terminal-body {
      padding: 22px;
      font-family: "SFMono-Regular", Consolas, Menlo, Monaco, monospace;
      font-size: 0.86rem;
      line-height: 1.65;
      color: #9cdcfe;
    }

    .terminal-body .cmd { color: #4ec9b0; }
    .terminal-body .string { color: #ce9178; }
    .terminal-body .key { color: #9cdcfe; }
    .terminal-body .comment { color: #6a9955; }

    /* 2. 行业痛点板块 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .pain-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 30px;
      border-radius: var(--radius-md);
      transition: var(--transition);
    }

    .pain-card:hover {
      transform: translateY(-4px);
      border-color: var(--border-accent);
    }

    .pain-tag {
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--danger);
      background: rgba(239, 68, 68, 0.1);
      padding: 3px 8px;
      border-radius: var(--radius-sm);
      display: inline-block;
      margin-bottom: 16px;
    }

    .pain-title {
      font-size: 1.25rem;
      font-weight: 600;
      margin-bottom: 12px;
      color: #fff;
    }

    .pain-text {
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 3. 解决方案系统 */
    .grid-2x2 {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
    }

    .solution-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      position: relative;
    }

    .solution-box h3 {
      font-size: 1.35rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: #fff;
    }

    .solution-box p {
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }

    .solution-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .solution-tags span {
      background: #172132;
      border: 1px solid var(--border-color);
      color: var(--text-main);
      font-size: 0.82rem;
      padding: 4px 12px;
      border-radius: var(--radius-sm);
    }

    /* 4. 场景演示 (Bento Grid) */
    .scenario-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr;
      gap: 24px;
    }

    .scenario-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 34px;
    }

    .scenario-card.full-col {
      grid-column: span 2;
    }

    .scenario-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
    }

    .scenario-badge {
      background: rgba(59, 130, 246, 0.15);
      color: var(--accent-color);
      font-size: 0.8rem;
      font-weight: 600;
      padding: 3px 10px;
      border-radius: var(--radius-sm);
    }

    .scenario-title {
      font-size: 1.3rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
    }

    .scenario-detail {
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 5. 优势数据与指标 */
    .stats-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }

    .stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px 20px;
    }

    .stat-number {
      font-size: 2.6rem;
      font-weight: 800;
      color: #fff;
      line-height: 1.1;
      margin-bottom: 8px;
      letter-spacing: -0.03em;
    }

    .stat-number span {
      color: var(--accent-color);
      font-size: 1.8rem;
    }

    .stat-label {
      color: var(--text-muted);
      font-size: 0.95rem;
      font-weight: 500;
    }

    /* 6. 限时动态 / 爆款热点条 */
    .urgent-banner {
      background: linear-gradient(90deg, #18253f, #0d121c);
      border: 1px solid rgba(59, 130, 246, 0.3);
      border-radius: var(--radius-lg);
      padding: 24px 32px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      margin-bottom: 40px;
    }

    .urgent-info {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .pulse-dot {
      width: 12px;
      height: 12px;
      background: var(--danger);
      border-radius: 50%;
      box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7);
      animation: pulse 1.6s infinite;
    }

    @keyframes pulse {
      0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7); }
      70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(239, 68, 68, 0); }
      100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
    }

    /* 7. 爆料线索与资讯流 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .news-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .news-header {
      display: flex;
      justify-content: space-between;
      font-size: 0.8rem;
      color: var(--text-dim);
      margin-bottom: 12px;
    }

    .news-topic {
      color: var(--accent-color);
      font-weight: 600;
    }

    .news-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
      line-height: 1.45;
    }

    .news-excerpt {
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .news-status {
      font-size: 0.8rem;
      color: var(--success);
      font-weight: 500;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    /* 8. 入口矩阵与频道导航 */
    .portal-matrix {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .matrix-btn {
      background: #141c2c;
      border: 1px solid var(--border-color);
      padding: 20px;
      border-radius: var(--radius-md);
      text-align: center;
      display: block;
      transition: var(--transition);
    }

    .matrix-btn:hover {
      background: #1b263b;
      border-color: var(--accent-color);
      transform: translateY(-2px);
    }

    .matrix-name {
      font-size: 1.05rem;
      font-weight: 600;
      color: #fff;
      margin-bottom: 6px;
    }

    .matrix-count {
      font-size: 0.82rem;
      color: var(--text-dim);
    }

    /* 9. 媒体精选横滑/宽卡展示 */
    .media-spotlight {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      align-items: center;
    }

    .spotlight-info h3 {
      font-size: 1.4rem;
      color: #fff;
      margin-bottom: 14px;
    }

    .spotlight-info p {
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }

    .spotlight-timeline {
      border-left: 2px solid var(--border-accent);
      padding-left: 20px;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .timeline-item {
      position: relative;
    }

    .timeline-item::before {
      content: "";
      position: absolute;
      left: -25px;
      top: 6px;
      width: 8px;
      height: 8px;
      background: var(--accent-color);
      border-radius: 50%;
    }

    .timeline-time {
      font-size: 0.8rem;
      color: var(--accent-color);
      font-weight: 600;
    }

    .timeline-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 10. 套餐与接入层级对比 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .pricing-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px 28px;
      position: relative;
      display: flex;
      flex-direction: column;
    }

    .pricing-card.featured {
      border-color: var(--accent-color);
      background: #151f33;
      box-shadow: 0 10px 30px rgba(59, 130, 246, 0.1);
    }

    .featured-label {
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--accent-color);
      color: #fff;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 2px 14px;
      border-radius: var(--radius-full);
      text-transform: uppercase;
    }

    .plan-name {
      font-size: 1.25rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 8px;
    }

    .plan-price {
      font-size: 2.2rem;
      font-weight: 800;
      color: #fff;
      margin-bottom: 18px;
    }

    .plan-features {
      list-style: none;
      margin-bottom: 28px;
      flex-grow: 1;
    }

    .plan-features li {
      color: var(--text-muted);
      font-size: 0.92rem;
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .plan-features li::before {
      content: "✓";
      color: var(--accent-color);
      font-weight: 800;
    }

    /* 11. 保障承诺条 */
    .guarantee-strip {
      background: #111723;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 44px 0;
    }

    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .guarantee-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
    }

    .guarantee-icon {
      font-size: 1.5rem;
      color: var(--accent-color);
      line-height: 1;
    }

    .guarantee-title {
      font-size: 1rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 4px;
    }

    .guarantee-desc {
      font-size: 0.85rem;
      color: var(--text-dim);
      line-height: 1.5;
    }

    /* 12. 转化与线索表单 */
    .form-wrapper {
      max-width: 680px;
      margin: 0 auto;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .form-input, .form-textarea, .form-select {
      width: 100%;
      background: #090d14;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 12px 16px;
      color: #fff;
      font-size: 0.95rem;
      font-family: inherit;
      outline: none;
      transition: var(--transition);
    }

    .form-input:focus, .form-textarea:focus, .form-select:focus {
      border-color: var(--accent-color);
      box-shadow: 0 0 0 3px var(--accent-glow);
    }

    .form-submit-btn {
      width: 100%;
      background: var(--accent-color);
      color: #fff;
      border: none;
      padding: 14px;
      border-radius: var(--radius-sm);
      font-size: 1rem;
      font-weight: 700;
      cursor: pointer;
      transition: var(--transition);
    }

    .form-submit-btn:hover {
      background: var(--accent-hover);
    }

    /* 统一页脚 */
    footer {
      background: #070a0f;
      border-top: 1px solid var(--border-color);
      padding: 64px 0 32px;
      color: var(--text-dim);
      font-size: 0.88rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 48px;
    }

    .footer-brand {
      color: #fff;
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .footer-desc {
      line-height: 1.6;
      margin-bottom: 16px;
      max-width: 320px;
    }

    .footer-col h4 {
      color: #fff;
      font-size: 0.98rem;
      font-weight: 600;
      margin-bottom: 18px;
    }

    .footer-col ul {
      list-style: none;
    }

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

    .footer-col a:hover {
      color: #fff;
    }

    .footer-bottom {
      border-top: 1px solid #161e2e;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
    }

    /* 响应式断点 */
    @media (max-width:1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .scenario-grid {
        grid-template-columns: 1fr;
      }
      .scenario-card.full-col {
        grid-column: span 1;
      }
      .pricing-grid {
        grid-template-columns: 1fr;
      }
      .stats-row {
        grid-template-columns: repeat(2, 1fr);
      }
      .guarantee-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .media-spotlight {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .header-wrapper {
        top: 10px;
        padding: 0 10px;
      }
      .nav-capsule {
        padding: 8px 14px;
        gap: 12px;
      }
      .nav-menu {
        display: none;
      }
      .hero-section {
        padding-top: 110px;
        padding-bottom: 60px;
      }
      .hero-content h1 {
        font-size: 2.1rem;
      }
      .grid-3, .grid-2x2, .news-grid, .portal-matrix {
        grid-template-columns: 1fr;
      }
      .stats-row {
        grid-template-columns: 1fr;
      }
      .guarantee-grid {
        grid-template-columns: 1fr;
      }
      .urgent-banner {
        flex-direction: column;
        align-items: flex-start;
      }
      .form-wrapper {
        padding: 24px 18px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }

    @media (max-width: 520px) {
      .section-title {
        font-size: 1.65rem;
      }
      .hero-content h1 {
        font-size: 1.8rem;
      }
      .terminal-body {
        font-size: 0.78rem;
        padding: 16px;
      }
    }