/* roulang page: index */
:root {
      --bg-deep: #0A0F24;
      --bg-mid: #111827;
      --purple: #A855F7;
      --purple-dark: #9333EA;
      --cyan: #22D3EE;
      --gold: #F59E0B;
      --white-strong: rgba(255,255,255,0.9);
      --white-mid: rgba(255,255,255,0.7);
      --white-soft: rgba(255,255,255,0.5);
      --glass-bg: rgba(255,255,255,0.03);
      --glass-border: rgba(168,85,247,0.15);
      --glass-shadow: 0 8px 32px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255,255,255,0.05);
      --radius-card: 24px;
      --radius-btn: 12px;
      --radius-tag: 20px;
    }

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

    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
      background: radial-gradient(ellipse at 30% 20%, #1a1f35 0%, #0A0F24 70%);
      color: var(--white-mid);
      line-height: 1.6;
      scroll-behavior: smooth;
      overflow-x: hidden;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 2rem;
    }

    /* 自定义导航吸顶 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 99;
      background: rgba(10,15,36,0.85);
      backdrop-filter: blur(24px);
      -webkit-backdrop-filter: blur(24px);
      border-bottom: 1px solid rgba(168,85,247,0.2);
      transition: all 0.3s ease;
    }

    .nav-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 48px;
      transition: height 0.3s ease;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      text-decoration: none;
      color: white;
    }

    .logo-icon {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, #A855F7, #22D3EE);
      border-radius: 10px;
      font-weight: 800;
      font-size: 1.3rem;
      color: #0A0F24;
      position: relative;
      box-shadow: 0 0 15px rgba(168,85,247,0.6);
    }

    .logo-dot {
      width: 6px;
      height: 6px;
      background: #F59E0B;
      border-radius: 50%;
      position: absolute;
      top: 4px;
      right: 4px;
      box-shadow: 0 0 8px #F59E0B;
    }

    .brand-text {
      font-weight: 700;
      font-size: 1.4rem;
      letter-spacing: 0.5px;
      background: linear-gradient(to right, #fff, #e9d5ff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .domain-badge {
      font-size: 0.7rem;
      color: rgba(255,255,255,0.5);
      margin-left: 0.2rem;
      letter-spacing: 0.5px;
    }

    .nav-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 44px;
      font-size: 0.9rem;
    }

    .nav-links {
      display: flex;
      gap: 2rem;
      list-style: none;
      margin: 0;
    }

    .nav-links a {
      color: var(--white-mid);
      text-decoration: none;
      font-weight: 500;
      transition: color 0.2s;
      position: relative;
    }

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

    .search-hot {
      display: flex;
      align-items: center;
      gap: 1rem;
    }

    .search-icon {
      font-size: 1.1rem;
      color: var(--white-mid);
      cursor: pointer;
    }

    .hot-tags {
      display: flex;
      gap: 0.6rem;
    }

    .tag {
      background: rgba(168,85,247,0.2);
      color: #e9d5ff;
      font-size: 0.7rem;
      padding: 2px 12px;
      border-radius: 20px;
      font-weight: 600;
      border: 0.5px solid rgba(168,85,247,0.4);
    }

    /* 吸顶压缩效果 */
    .site-header.scrolled .nav-top {
      height: 40px;
    }

    .hamburger {
      display: none;
      background: none;
      border: none;
      color: white;
      font-size: 1.8rem;
      cursor: pointer;
    }

    /* 板块通用 */
    section {
      padding: 5rem 0;
    }

    .section-title {
      font-size: 2.4rem;
      font-weight: 700;
      color: white;
      margin-bottom: 1rem;
      letter-spacing: -0.5px;
    }

    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-card);
      box-shadow: var(--glass-shadow);
    }

    .btn-primary {
      background: var(--purple);
      border: none;
      color: white;
      padding: 0.9rem 2.2rem;
      border-radius: var(--radius-btn);
      font-weight: 700;
      box-shadow: 0 0 20px rgba(168,85,247,0.5);
      transition: all 0.3s;
      display: inline-block;
      text-decoration: none;
      cursor: pointer;
    }

    .btn-primary:hover {
      background: var(--purple-dark);
      box-shadow: 0 0 30px rgba(168,85,247,0.8);
      transform: scale(1.05);
      color: white;
    }

    .btn-outline {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.3);
      color: white;
      padding: 0.85rem 2.2rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: 0.3s;
      text-decoration: none;
      display: inline-block;
    }

    .btn-outline:hover {
      border-color: var(--purple);
      background: rgba(168,85,247,0.1);
      color: white;
    }

    /* Hero */
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: center;
      min-height: 85vh;
    }

    .hero-image img {
      width: 100%;
      border-radius: 32px;
      filter: drop-shadow(0 0 25px rgba(168,85,247,0.4));
      animation: float 6s infinite ease-in-out;
    }

    @keyframes float {
      0% { transform: translateY(0px); }
      50% { transform: translateY(-12px); }
      100% { transform: translateY(0px); }
    }

    .data-badges {
      display: flex;
      gap: 2rem;
      margin-top: 2.5rem;
      color: var(--cyan);
      font-weight: 700;
    }

    /* 功能卡片三列 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }

    .feature-icon {
      width: 64px;
      height: 64px;
      background: rgba(255,255,255,0.05);
      border-radius: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 1.5rem;
      border: 1px solid rgba(168,85,247,0.3);
    }

    .tech-param {
      color: var(--cyan);
      font-family: monospace;
      font-size: 0.8rem;
      margin-top: 0.8rem;
    }

    /* 场景图文 */
    .scenario-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: center;
      margin-bottom: 4rem;
    }

    .scenario-img img {
      border-radius: 24px;
      width: 100%;
      border: 1px solid rgba(168,85,247,0.3);
    }

    /* 案例横向滚动 */
    .cases-scroll {
      display: flex;
      gap: 1.5rem;
      overflow-x: auto;
      scroll-snap-type: x mandatory;
      padding-bottom: 1rem;
    }

    .case-card {
      min-width: 300px;
      scroll-snap-align: start;
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      border-radius: 24px;
      border: 1px solid var(--glass-border);
      padding: 1.5rem;
    }

    /* 价格 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.8rem;
    }

    .pricing-card.featured {
      border: 2px solid var(--purple);
      box-shadow: 0 0 35px rgba(168,85,247,0.5);
      position: relative;
    }

    .popular-badge {
      position: absolute;
      top: -12px;
      right: 20px;
      background: var(--purple);
      color: white;
      padding: 4px 18px;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: bold;
    }

    /* FAQ */
    .accordion-item {
      border-bottom: 1px solid rgba(255,255,255,0.05);
    }

    .accordion-title {
      background: rgba(255,255,255,0.02);
      padding: 1.2rem;
      font-weight: 700;
      color: white;
      cursor: pointer;
      border-left: 3px solid transparent;
    }

    .accordion-title.active {
      border-left: 3px solid var(--purple);
    }

    /* 页脚 */
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 2rem;
    }

    @media (max-width: 1024px) {
      .hero-grid, .scenario-row {
        grid-template-columns: 1fr;
      }
      .features-grid, .pricing-grid {
        grid-template-columns: repeat(2,1fr);
      }
    }

    @media (max-width: 640px) {
      .nav-links, .search-hot {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .features-grid, .pricing-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .cases-scroll {
        flex-direction: column;
      }
    }