/* roulang page: index */
:root {
      --deep-midnight: #0A1128;
      --bg-primary: #060B1A;
      --bg-card: rgba(10, 17, 40, 0.8);
      --electric-cyan: #00F0FF;
      --electric-cyan-dark: #00B4D8;
      --sport-red: #FF3366;
      --text-primary: #FFFFFF;
      --text-secondary: rgba(255, 255, 255, 0.7);
      --text-muted: rgba(255, 255, 255, 0.45);
      --border-glow: rgba(0, 240, 255, 0.2);
      --card-border: rgba(0, 240, 255, 0.15);
      --radius-sm: 12px;
      --radius-md: 16px;
      --radius-lg: 20px;
      --radius-pill: 50px;
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
      --shadow-hover: 0 12px 40px rgba(0, 240, 255, 0.15);
      --frost-bg: rgba(255, 255, 255, 0.03);
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      background-color: var(--bg-primary);
      color: var(--text-primary);
      line-height: 1.6;
      scroll-behavior: smooth;
      -webkit-font-smoothing: antialiased;
    }
    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航 */
    .nav-glass {
      position: fixed;
      top: 20px;
      left: 50%;
      transform: translateX(-50%);
      width: auto;
      max-width: 600px;
      background: rgba(10, 17, 40, 0.75);
      backdrop-filter: blur(30px);
      -webkit-backdrop-filter: blur(30px);
      border: 1px solid var(--border-glow);
      border-radius: 60px;
      padding: 8px 28px;
      z-index: 100;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: 0 4px 20px rgba(0,0,0,0.5);
    }
    .logo-text {
      font-size: 22px;
      font-weight: 700;
      color: var(--electric-cyan);
      letter-spacing: 1px;
      margin-right: 30px;
      white-space: nowrap;
    }
    .nav-links {
      display: flex;
      gap: 24px;
      align-items: center;
    }
    .nav-links a {
      font-size: 15px;
      font-weight: 500;
      color: rgba(255,255,255,0.8);
      text-decoration: none;
      transition: color 0.2s, border-bottom 0.2s;
      padding-bottom: 4px;
      border-bottom: 2px solid transparent;
    }
    .nav-links a.active,
    .nav-links a:hover {
      color: var(--electric-cyan);
      border-bottom-color: var(--electric-cyan);
      text-shadow: 0 0 8px rgba(0,240,255,0.5);
    }
    .hamburger {
      display: none;
      font-size: 24px;
      color: var(--electric-cyan);
      cursor: pointer;
    }
    /* 移动端导航 */
    @media (max-width: 768px) {
      .nav-glass {
        top: auto;
        bottom: 16px;
        width: 92%;
        max-width: 100%;
        left: 4%;
        transform: translateX(0);
        border-radius: 50px;
        background: rgba(10, 17, 40, 0.9);
      }
      .desktop-nav {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .logo-text {
        margin-right: auto;
      }
      .mobile-menu {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(6, 11, 26, 0.98);
        backdrop-filter: blur(25px);
        z-index: 99;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 28px;
      }
      .mobile-menu a {
        font-size: 24px;
        color: white;
        text-decoration: none;
        font-weight: 500;
      }
      .mobile-menu a:hover {
        color: var(--electric-cyan);
      }
      .mobile-menu.active {
        display: flex;
      }
    }
    /* Hero */
    .hero-section {
      height: 100vh;
      min-height: 700px;
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
      background: radial-gradient(circle at 30% 40%, #0F1A3A, #060B1A);
      overflow: hidden;
    }
    #particle-canvas {
      position: absolute;
      top:0;
      left:0;
      width:100%;
      height:100%;
      pointer-events: none;
    }
    .hero-content {
      text-align: center;
      z-index: 2;
      max-width: 800px;
      padding: 0 20px;
    }
    .hero-title {
      font-size: clamp(36px, 5vw, 64px);
      font-weight: 800;
      background: linear-gradient(to right, #FFFFFF, #00F0FF);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 16px;
    }
    .hero-sub {
      font-size: 18px;
      color: rgba(255,255,255,0.6);
      max-width: 600px;
      margin: 0 auto 32px;
    }
    .hero-line {
      width: 80px;
      height: 2px;
      background: var(--electric-cyan);
      box-shadow: 0 0 15px var(--electric-cyan);
      margin: 0 auto 32px;
    }
    .btn-group {
      display: flex;
      gap: 20px;
      justify-content: center;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, #00F0FF, #00B4D8);
      color: #0A1128;
      font-weight: 700;
      padding: 14px 36px;
      border-radius: 50px;
      text-decoration: none;
      box-shadow: 0 0 20px rgba(0,240,255,0.5);
      transition: all 0.3s ease;
      border: none;
      cursor: pointer;
      display: inline-block;
    }
    .btn-primary:hover {
      box-shadow: 0 0 35px rgba(0,240,255,0.8);
      transform: translateY(-2px);
      color: #0A1128;
    }
    .btn-ghost {
      background: transparent;
      border: 2px solid var(--electric-cyan);
      color: var(--electric-cyan);
      font-weight: 600;
      padding: 14px 36px;
      border-radius: 50px;
      text-decoration: none;
      transition: 0.3s;
    }
    .btn-ghost:hover {
      background: var(--electric-cyan);
      color: #0A1128;
    }
    /* 板块通用 */
    section {
      padding: 100px 0;
    }
    .section-title {
      font-size: 36px;
      font-weight: 700;
      text-align: center;
      margin-bottom: 16px;
      color: white;
    }
    .section-desc {
      text-align: center;
      color: var(--text-secondary);
      max-width: 700px;
      margin: 0 auto 48px;
    }
    /* 卡片网格 */
    .grid-custom {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .glass-card {
      background: var(--frost-bg);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      transition: all 0.3s ease;
      box-shadow: var(--shadow-card);
      text-align: center;
    }
    .glass-card:hover {
      transform: translateY(-8px);
      border-color: var(--electric-cyan);
      box-shadow: var(--shadow-hover);
    }
    .card-icon {
      font-size: 48px;
      color: var(--electric-cyan);
      margin-bottom: 20px;
    }
    .card-title {
      font-size: 22px;
      font-weight: 600;
      margin-bottom: 12px;
    }
    .card-desc {
      color: var(--text-secondary);
      font-size: 15px;
      margin-bottom: 20px;
    }
    .card-link {
      color: var(--electric-cyan);
      text-decoration: none;
      font-weight: 500;
    }
    /* 数据统计 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 30px;
      text-align: center;
    }
    .stat-number {
      font-size: 48px;
      font-weight: 700;
      color: var(--electric-cyan);
    }
    .stat-label {
      font-size: 14px;
      color: var(--text-secondary);
      text-transform: uppercase;
    }
    /* 案例卡片 */
    .case-card {
      background: #1A1F35;
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: 0.3s;
      border: 1px solid transparent;
    }
    .case-card:hover {
      border-color: var(--electric-cyan);
      transform: translateY(-5px);
    }
    .case-img {
      height: 200px;
      background-size: cover;
      background-position: center;
      transition: transform 0.3s;
    }
    .case-card:hover .case-img {
      transform: scale(1.05);
    }
    .case-info {
      padding: 20px;
    }
    .tag {
      background: var(--sport-red);
      color: white;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 12px;
      font-weight: 600;
      display: inline-block;
      margin-bottom: 8px;
    }
    /* 流程 */
    .steps {
      display: flex;
      justify-content: space-between;
      text-align: center;
    }
    .step-item {
      flex:1;
      position: relative;
      padding: 0 15px;
    }
    .step-num {
      width: 60px;
      height: 60px;
      background: rgba(0,240,255,0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 28px;
      font-weight: 700;
      color: var(--electric-cyan);
      margin: 0 auto 16px;
    }
    /* FAQ */
    .accordion-item {
      background: rgba(255,255,255,0.03);
      margin-bottom: 12px;
      border-radius: 12px;
      border-left: 3px solid var(--electric-cyan);
    }
    .accordion-title {
      font-size: 18px;
      font-weight: 500;
      padding: 20px;
      color: white;
    }
    .accordion-content {
      padding: 0 20px 20px;
      color: var(--text-secondary);
    }
    /* 联系 */
    .contact-section {
      background: #0A1128;
    }
    .input-style {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(0,240,255,0.2);
      border-radius: 12px;
      padding: 14px;
      color: white;
      width: 100%;
      margin-bottom: 16px;
    }
    .input-style:focus {
      border-color: var(--electric-cyan);
      box-shadow: 0 0 10px var(--electric-cyan);
      outline: none;
    }
    .footer-links a {
      color: rgba(255,255,255,0.6);
      text-decoration: none;
      font-size: 14px;
    }
    .footer-links a:hover {
      color: var(--electric-cyan);
    }
    @media (max-width: 1024px) {
      .grid-custom { grid-template-columns: repeat(2,1fr); }
      .stats-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 640px) {
      .grid-custom { grid-template-columns: 1fr; }
      .stats-grid { grid-template-columns: 1fr; }
      .steps { flex-direction: column; }
      .nav-links.desktop-nav { display: none; }
    }