/* roulang page: index */
:root {
      --bg-dark: #040711;
      --bg-card: rgba(16, 24, 48, 0.72);
      --bg-card-hover: rgba(22, 33, 66, 0.85);
      --text-main: #f1f5f9;
      --text-muted: #94a3b8;
      --accent-cyan: #00d2ff;
      --accent-blue: #0066ff;
      --accent-green: #10b981;
      --accent-pink: #f43f5e;
      --border-color: rgba(0, 210, 255, 0.16);
      --border-glow: rgba(0, 210, 255, 0.4);
      --shadow-glow: 0 0 25px rgba(0, 102, 255, 0.45);
      --font-base: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: var(--font-base);
      line-height: 1.75;
      overflow-x: hidden;
      font-size: 16px;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

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

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .section-spacing {
      padding: 96px 0;
      position: relative;
    }

    .section-alt {
      background: radial-gradient(circle at 50% 10%, rgba(0, 102, 255, 0.08), transparent 70%), #060b18;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    /* 顶部双行导航 */
    .top-toolbar {
      background: #020409;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 13px;
      color: var(--text-muted);
      padding: 8px 0;
    }

    .toolbar-flex {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }

    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .status-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: var(--accent-green);
      box-shadow: 0 0 10px var(--accent-green);
    }

    .sticky-header {
      position: sticky;
      top: 0;
      z-index: 99;
      background: rgba(4, 7, 17, 0.85);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-color);
    }

    .header-nav {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 76px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 19px;
      font-weight: 700;
      letter-spacing: 0.5px;
      color: #fff;
    }

    .brand-logo-icon {
      width: 38px;
      height: 38px;
      border-radius: 10px;
      background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 16px rgba(0, 210, 255, 0.4);
    }

    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 28px;
    }

    .nav-links a {
      font-size: 15px;
      color: #cbd5e1;
      font-weight: 500;
    }

    .nav-links a:hover {
      color: var(--accent-cyan);
    }

    /* 按钮组件 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 13px 28px;
      border-radius: 8px;
      font-size: 15px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.3s ease;
      min-height: 48px;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
      color: #fff;
      border: 1px solid rgba(255, 255, 255, 0.2);
      box-shadow: var(--shadow-glow);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 35px rgba(0, 210, 255, 0.7);
    }

    .btn-outline {
      background: rgba(16, 24, 48, 0.6);
      color: var(--accent-cyan);
      border: 1px solid var(--border-color);
      backdrop-filter: blur(8px);
    }

    .btn-outline:hover {
      border-color: var(--accent-cyan);
      background: rgba(0, 210, 255, 0.1);
      color: #fff;
    }

    /* 板块通用标题 */
    .section-head {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 56px auto;
    }

    .section-tag {
      display: inline-block;
      font-size: 13px;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--accent-cyan);
      margin-bottom: 12px;
      padding: 4px 14px;
      background: rgba(0, 210, 255, 0.1);
      border: 1px solid rgba(0, 210, 255, 0.25);
      border-radius: 999px;
    }

    .section-title {
      font-size: 34px;
      font-weight: 700;
      color: #fff;
      line-height: 1.35;
      margin-bottom: 16px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.8;
    }

    /* 玻璃态卡片 */
    .glass-card {
      background: var(--bg-card);
      backdrop-filter: blur(14px);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 32px;
      transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    }

    .glass-card:hover {
      border-color: var(--border-glow);
      background: var(--bg-card-hover);
      transform: translateY(-5px);
      box-shadow: 0 12px 30px rgba(0, 0, 0, 0.45);
    }

    /* HERO 区块：新品发布与倒计时环 */
    #hero {
      padding: 80px 0 110px 0;
      background: linear-gradient(180deg, #091226 0%, #040711 100%);
      position: relative;
    }

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

    .hero-h1 {
      font-size: 44px;
      line-height: 1.25;
      font-weight: 800;
      color: #fff;
      margin-bottom: 22px;
      letter-spacing: -0.5px;
    }

    .hero-intro {
      font-size: 16px;
      color: #cbd5e1;
      margin-bottom: 34px;
      line-height: 1.8;
    }

    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 40px;
    }

    .hero-countdown-box {
      background: rgba(16, 24, 48, 0.85);
      border: 1px solid var(--accent-cyan);
      border-radius: 16px;
      padding: 30px;
      box-shadow: 0 0 30px rgba(0, 210, 255, 0.25);
    }

    .countdown-title {
      font-size: 16px;
      color: var(--accent-cyan);
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .countdown-ring-wrap {
      display: flex;
      justify-content: space-around;
      gap: 12px;
      text-align: center;
      margin-bottom: 24px;
    }

    .countdown-unit {
      width: 74px;
      height: 74px;
      border-radius: 50%;
      border: 2px solid var(--border-glow);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      background: rgba(0, 102, 255, 0.1);
    }

    .countdown-val {
      font-size: 22px;
      font-weight: 700;
      font-family: var(--font-mono);
      color: #fff;
      line-height: 1;
    }

    .countdown-lbl {
      font-size: 11px;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* 区块2: 架构解构 */
    .arch-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .spec-table {
      width: 100%;
      margin-top: 24px;
      border-collapse: collapse;
      font-size: 14px;
    }

    .spec-table th, .spec-table td {
      padding: 12px 16px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      text-align: left;
    }

    .spec-table th {
      color: var(--accent-cyan);
      font-weight: 600;
    }

    .layer-cards {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .layer-step {
      background: rgba(16, 24, 48, 0.5);
      border-left: 4px solid var(--accent-cyan);
      padding: 16px 20px;
      border-radius: 0 10px 10px 0;
    }

    /* 区块3: 6卡片网格 */
    .grid-3x2 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .feature-icon-bar {
      font-size: 26px;
      margin-bottom: 18px;
      color: var(--accent-cyan);
    }

    /* 区块4: 3核心立体模块 */
    .modules-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .module-card {
      border-top: 3px solid var(--accent-blue);
      position: relative;
      overflow: hidden;
    }

    .module-card:nth-child(2) {
      border-top-color: var(--accent-cyan);
      transform: translateY(-8px);
    }

    .module-card:nth-child(3) {
      border-top-color: var(--accent-green);
    }

    .spec-list {
      list-style: none;
      margin: 20px 0;
      font-size: 14px;
      color: var(--text-muted);
    }

    .spec-list li {
      padding: 6px 0;
      border-bottom: 1px dashed rgba(255, 255, 255, 0.06);
    }

    /* 区块5: 数据处理流展示 */
    .flow-wrapper {
      background: rgba(9, 14, 28, 0.9);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 40px;
    }

    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
      margin-top: 36px;
    }

    .flow-box {
      background: rgba(16, 24, 48, 0.9);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: 12px;
      padding: 24px;
      text-align: center;
      position: relative;
    }

    .flow-badge {
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--accent-blue);
      color: #fff;
      font-size: 11px;
      padding: 2px 10px;
      border-radius: 10px;
      font-family: var(--font-mono);
    }

    /* 区块6: 真实场景展示 */
    .scenarios-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .scenario-card {
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .scenario-thumb {
      height: 160px;
      border-radius: 8px;
      overflow: hidden;
      margin-bottom: 20px;
    }

    .scenario-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    /* 区块7: 数据指标横条 */
    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      background: linear-gradient(90deg, rgba(0, 102, 255, 0.15), rgba(0, 210, 255, 0.15));
      border: 1px solid var(--border-glow);
      border-radius: 16px;
      padding: 44px 32px;
      text-align: center;
    }

    .metric-value {
      font-size: 40px;
      font-weight: 800;
      color: #fff;
      font-family: var(--font-mono);
      text-shadow: 0 0 20px var(--accent-cyan);
      margin-bottom: 6px;
    }

    .metric-label {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* 区块8: 验证评价墙 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .quote-icon {
      font-size: 36px;
      color: var(--accent-cyan);
      opacity: 0.4;
      line-height: 1;
      margin-bottom: 12px;
    }

    .author-meta {
      margin-top: 20px;
      padding-top: 16px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 13px;
    }

    .author-meta b {
      color: #fff;
      display: block;
    }

    /* 区块9: 资讯列表 */
    .insights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .insight-card {
      display: flex;
      flex-direction: column;
    }

    .insight-img {
      height: 180px;
      border-radius: 10px;
      overflow: hidden;
      margin-bottom: 18px;
    }

    .insight-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .insight-time {
      font-size: 12px;
      color: var(--accent-cyan);
      margin-bottom: 8px;
    }

    /* 区块10: 价格部署方案 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
      align-items: stretch;
    }

    .pricing-card {
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 36px 28px;
      background: var(--bg-card);
      display: flex;
      flex-direction: column;
      position: relative;
    }

    .pricing-card.featured {
      border-color: var(--accent-cyan);
      box-shadow: 0 0 35px rgba(0, 210, 255, 0.25);
      background: rgba(16, 28, 58, 0.85);
    }

    .pricing-badge {
      position: absolute;
      top: -12px;
      right: 24px;
      background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
      color: #fff;
      font-size: 12px;
      padding: 3px 12px;
      border-radius: 20px;
      font-weight: 600;
    }

    .price-num {
      font-size: 32px;
      font-weight: 700;
      color: #fff;
      margin: 18px 0;
      font-family: var(--font-mono);
    }

    .pricing-features {
      list-style: none;
      margin: 24px 0;
      flex-grow: 1;
    }

    .pricing-features li {
      font-size: 14px;
      color: #cbd5e1;
      padding: 8px 0;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .check-mark {
      color: var(--accent-green);
      font-weight: bold;
    }

    /* 区块11: FAQ 手风琴 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      margin-bottom: 16px;
      overflow: hidden;
      transition: all 0.3s;
    }

    .faq-question {
      padding: 22px 28px;
      font-size: 17px;
      font-weight: 600;
      color: #fff;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-toggle {
      font-size: 20px;
      color: var(--accent-cyan);
      transition: transform 0.3s;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out, padding 0.3s ease;
      padding: 0 28px;
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.8;
    }

    .faq-item.active {
      border-color: var(--border-glow);
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding-bottom: 22px;
    }

    .faq-item.active .faq-toggle {
      transform: rotate(45deg);
    }

    /* 区块12: 转化表单 */
    .conversion-box {
      background: radial-gradient(circle at top right, rgba(0, 210, 255, 0.15), rgba(16, 24, 48, 0.95)), #080f24;
      border: 1px solid var(--accent-cyan);
      border-radius: 20px;
      padding: 56px;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
      box-shadow: var(--shadow-glow);
    }

    .conversion-form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .form-control {
      background: rgba(4, 7, 17, 0.7);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: 8px;
      padding: 14px 18px;
      color: #fff;
      font-size: 15px;
      width: 100%;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--accent-cyan);
      box-shadow: 0 0 12px rgba(0, 210, 255, 0.3);
    }

    /* 页脚 */
    footer {
      background: #020408;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 64px 0 32px 0;
      font-size: 14px;
      color: #64748b;
    }

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

    .footer-title {
      color: #fff;
      font-size: 16px;
      font-weight: 600;
      margin-bottom: 20px;
    }

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

    .footer-list li {
      margin-bottom: 12px;
    }

    .footer-list a:hover {
      color: var(--accent-cyan);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 28px;
      text-align: center;
      font-size: 13px;
      line-height: 1.8;
    }

    /* 移动端汉堡菜单 */
    .mobile-menu-btn {
      display: none;
      background: transparent;
      border: none;
      color: #fff;
      font-size: 24px;
      cursor: pointer;
    }

    /* 响应式调整 */
    @media (max-width: 1024px) {
      .hero-grid, .arch-grid, .conversion-box {
        grid-template-columns: 1fr;
      }
      .grid-3x2, .modules-grid, .scenarios-grid, .testimonials-grid, .insights-grid, .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .flow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-bar {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        right: 0;
        background: rgba(4, 7, 17, 0.96);
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.show {
        display: flex;
      }
      .grid-3x2, .modules-grid, .scenarios-grid, .testimonials-grid, .insights-grid, .pricing-grid {
        grid-template-columns: 1fr;
      }
      .flow-steps {
        grid-template-columns: 1fr;
      }
      .metrics-bar {
        grid-template-columns: 1fr;
      }
      .hero-h1 {
        font-size: 32px;
      }
      .section-title {
        font-size: 26px;
      }
      .conversion-box {
        padding: 32px 20px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }