/* roulang page: index */
:root {
      --primary: #0A0F24;
      --accent: #00E5FF;
      --gold: #FFB800;
      --bg-gradient: linear-gradient(135deg, #0A0F24 0%, #141B33 100%);
      --glass-bg: rgba(255, 255, 255, 0.03);
      --glass-border: rgba(255, 255, 255, 0.08);
      --text-primary: #FFFFFF;
      --text-secondary: rgba(255, 255, 255, 0.7);
      --text-muted: rgba(255, 255, 255, 0.55);
      --radius: 16px;
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
      --transition: 0.3s ease;
      --container-max: 1280px;
      --font-sans: 'Noto Sans SC', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    }

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

    body {
      font-family: var(--font-sans);
      background: var(--primary);
      background-image: var(--bg-gradient);
      color: var(--text-primary);
      line-height: 1.8;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 5vw;
    }

    /* 浮动Dock导航 */
    .dock-nav {
      position: fixed;
      top: 24px;
      left: 50%;
      transform: translateX(-50%);
      width: auto;
      max-width: 720px;
      background: rgba(10, 15, 36, 0.75);
      backdrop-filter: blur(30px);
      -webkit-backdrop-filter: blur(30px);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: 999px;
      padding: 8px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      z-index: 1000;
      box-shadow: 0 12px 32px rgba(0,0,0,0.5);
    }

    .logo-area {
      display: flex;
      align-items: baseline;
      gap: 4px;
      font-weight: 700;
      font-size: 1.5rem;
      letter-spacing: -0.5px;
      color: white;
      text-decoration: none;
      white-space: nowrap;
    }
    .logo-area span {
      border-bottom: 2px solid var(--accent);
      padding-bottom: 2px;
    }

    .nav-links {
      display: flex;
      gap: 20px;
      align-items: center;
    }

    .nav-links a {
      color: var(--text-secondary);
      text-decoration: none;
      font-size: 0.9rem;
      font-weight: 500;
      transition: color 0.2s;
      white-space: nowrap;
    }
    .nav-links a:hover {
      color: var(--accent);
    }

    .btn-nav-cta {
      background: var(--accent);
      color: var(--primary);
      border: none;
      padding: 8px 20px;
      border-radius: 50px;
      font-weight: 600;
      font-size: 0.9rem;
      cursor: pointer;
      transition: 0.25s;
      white-space: nowrap;
      text-decoration: none;
      display: inline-block;
    }
    .btn-nav-cta:hover {
      box-shadow: 0 0 20px rgba(0,229,255,0.5);
      transform: scale(1.02);
    }

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

    /* Hero双栏 */
    .hero-section {
      min-height: 100vh;
      display: flex;
      align-items: center;
      padding-top: 80px;
      position: relative;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
      background-color: rgba(10,15,36,0.7);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 5fr 7fr;
      gap: 40px;
      align-items: center;
      width: 100%;
    }
    .hero-left {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .hero-tag {
      color: var(--accent);
      font-weight: 600;
      letter-spacing: 2px;
      font-size: 0.9rem;
    }
    h1 {
      font-size: 56px;
      font-weight: 700;
      letter-spacing: -0.5px;
      line-height: 1.2;
      margin: 0;
    }
    .hero-sub {
      color: var(--text-secondary);
      font-size: 1.1rem;
      max-width: 90%;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      margin-top: 8px;
    }
    .btn-primary {
      background: var(--accent);
      color: var(--primary);
      border: none;
      padding: 14px 36px;
      border-radius: 50px;
      font-weight: 600;
      font-size: 1rem;
      cursor: pointer;
      text-decoration: none;
      display: inline-block;
      transition: var(--transition);
    }
    .btn-primary:hover {
      box-shadow: 0 0 24px rgba(0,229,255,0.6);
      transform: scale(1.03);
    }
    .btn-secondary {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.25);
      color: white;
      padding: 14px 36px;
      border-radius: 50px;
      font-weight: 600;
      cursor: pointer;
      text-decoration: none;
      transition: var(--transition);
    }
    .btn-secondary:hover {
      border-color: var(--accent);
      color: var(--accent);
    }
    .hero-right {
      display: flex;
      justify-content: center;
      align-items: center;
    }
    .geometric-art {
      width: 100%;
      max-width: 500px;
      height: auto;
    }

    /* 通用板块 */
    section {
      padding: 90px 0;
    }
    h2 {
      font-size: 40px;
      font-weight: 700;
      margin-bottom: 48px;
      text-align: center;
    }
    .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);
      padding: 32px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }
    .glass-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 40px rgba(0,0,0,0.6);
    }

    /* 亮点网格 */
    .highlights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .icon-circle {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      border: 2px solid var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--accent);
      font-size: 1.5rem;
    }
    h3 {
      font-size: 22px;
      font-weight: 600;
      margin-bottom: 12px;
    }

    /* 案例瀑布流 */
    .cases-masonry {
      columns: 2;
      column-gap: 24px;
    }
    .case-card {
      break-inside: avoid;
      margin-bottom: 24px;
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius);
      overflow: hidden;
      transition: var(--transition);
      position: relative;
    }
    .case-card:nth-child(odd) {
      margin-top: 40px;
    }
    .case-img {
      position: relative;
      height: 200px;
      background-size: cover;
      background-position: center;
    }
    .case-img .overlay {
      position: absolute;
      inset: 0;
      background: rgba(0,229,255,0.15);
    }
    .case-content {
      padding: 24px;
    }
    .case-tag {
      color: var(--accent);
      font-size: 0.8rem;
      font-weight: 600;
    }

    /* 对比表 */
    .compare-table {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }
    .compare-col {
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      border:1px solid var(--glass-border);
      border-radius: var(--radius);
      padding: 32px;
    }
    .recommend-badge {
      background: var(--gold);
      color: #0A0F24;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 50px;
      font-size: 0.8rem;
      margin-left: 8px;
    }
    .compare-row {
      display: flex;
      justify-content: space-between;
      padding: 16px 0;
      border-bottom: 1px solid rgba(255,255,255,0.1);
    }

    /* 数据仪表板 */
    .data-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 24px;
    }
    .data-item {
      text-align: center;
    }
    .data-number {
      font-size: 3rem;
      font-weight: 700;
      color: var(--accent);
    }

    /* 流程 */
    .process-steps {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
    }
    .step-circle {
      width: 80px;
      height: 80px;
      border-radius: 50%;
      background: rgba(255,255,255,0.05);
      backdrop-filter: blur(10px);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.5rem;
      border:1px solid var(--glass-border);
      margin-bottom: 16px;
    }

    /* FAQ */
    .faq-item {
      margin-bottom: 16px;
    }
    .faq-question {
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      border:1px solid var(--glass-border);
      padding: 20px;
      border-radius: var(--radius);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
    }
    .faq-answer {
      background: rgba(0,0,0,0.3);
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s;
    }
    .faq-answer.open {
      max-height: 200px;
      padding: 24px;
    }

    /* CTA */
    .cta-band {
      background: linear-gradient(135deg, rgba(0,229,255,0.1) 0%, rgba(10,15,36,0.9) 100%);
      text-align: center;
      padding: 80px 0;
    }

    footer {
      padding: 60px 0 30px;
      border-top: 1px solid rgba(255,255,255,0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
    }

    @media (max-width: 1024px) {
      h1 { font-size: 42px; }
      .hero-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 768px) {
      .dock-nav { width: 92vw; justify-content: space-between; }
      .nav-links, .btn-nav-cta { display: none; }
      .mobile-menu-icon { display: block; }
      .highlights-grid, .data-grid { grid-template-columns: 1fr; }
      .cases-masonry { columns: 1; }
      .case-card:nth-child(odd) { margin-top: 0; }
      .compare-table { grid-template-columns: 1fr; overflow-x: auto; }
      .process-steps { flex-direction: column; gap: 30px; }
      .footer-grid { grid-template-columns: 1fr; }
      h2 { font-size: 32px; }
    }