/* roulang page: index */
:root {
      --primary: #7B2FFF;
      --primary-glow: rgba(123, 47, 255, 0.5);
      --secondary: #F5A623;
      --accent: #00F0FF;
      --bg-dark: #0A0A0F;
      --bg-card: #14141F;
      --bg-light: #F8F8FC;
      --text-dark-heading: #1A1A2E;
      --text-dark-body: #4A4A60;
      --text-light-heading: #FFFFFF;
      --text-light-body: #B0B0C0;
      --radius-card-tl: 16px;
      --radius-card-br: 16px;
      --radius-card-other: 4px;
      --shadow-card: 0 4px 24px rgba(123,47,255,0.08);
      --shadow-card-hover: 0 12px 40px rgba(123,47,255,0.2);
      --transition-fast: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
      --container-max: 1280px;
    }

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

    body {
      font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      background-color: var(--bg-dark);
      color: var(--text-light-body);
      line-height: 1.7;
      font-size: 16px;
      scroll-behavior: smooth;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 40px;
    }

    /* 导航栏 */
    .main-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      transition: background 0.3s, backdrop-filter 0.3s;
      background: transparent;
    }

    .main-header.scrolled {
      background: rgba(10, 10, 15, 0.92);
      backdrop-filter: blur(12px);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 40px;
      height: 80px;
    }

    .logo {
      font-family: 'Orbitron', 'Microsoft YaHei', sans-serif;
      font-weight: 800;
      font-size: 24px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      display: flex;
      align-items: center;
      gap: 8px;
      text-decoration: none;
      transition: transform 0.3s;
    }

    .logo-icon {
      width: 28px;
      height: 28px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
      display: inline-block;
      transform: rotate(0deg);
    }

    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }

    .nav-link {
      font-weight: 500;
      font-size: 15px;
      color: rgba(255,255,255,0.8);
      text-decoration: none;
      position: relative;
      padding-bottom: 6px;
      transition: color 0.2s;
    }

    .nav-link:hover,
    .nav-link.active {
      color: white;
    }

    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent);
    }

    .nav-cta {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: white;
      padding: 10px 24px;
      border-radius: 8px;
      font-weight: 600;
      text-decoration: none;
      font-size: 14px;
      transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    }

    .nav-cta:hover {
      transform: scale(1.05);
      box-shadow: 0 0 28px var(--primary-glow);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      z-index: 1001;
    }

    .hamburger span {
      width: 28px;
      height: 3px;
      background: var(--accent);
      transition: all 0.3s;
    }

    /* 移动端导航 */
    @media (max-width: 1024px) {
      .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        max-width: 320px;
        height: 100vh;
        background: rgba(10,10,15,0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        padding: 40px;
        transition: right 0.4s;
      }
      .nav-links.active {
        right: 0;
      }
      .hamburger {
        display: flex;
      }
      .nav-link {
        font-size: 20px;
        margin: 16px 0;
      }
    }

    /* 区块间距 */
    section {
      padding: 100px 0;
      scroll-margin-top: 80px;
    }

    .bg-light-section {
      background-color: var(--bg-light);
    }

    .section-title {
      font-family: 'Orbitron', 'Microsoft YaHei', sans-serif;
      font-weight: 700;
      font-size: 40px;
      color: var(--text-light-heading);
      margin-bottom: 16px;
      text-align: left;
    }

    .bg-light-section .section-title {
      color: var(--text-dark-heading);
    }

    .section-subtitle {
      font-size: 18px;
      color: var(--text-light-body);
      margin-bottom: 48px;
    }

    .bg-light-section .section-subtitle {
      color: var(--text-dark-body);
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: radial-gradient(circle at 30% 40%, #1a1030 0%, #0A0A0F 80%);
      position: relative;
      overflow: hidden;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }

    .hero-title {
      font-family: 'Orbitron', 'Microsoft YaHei', sans-serif;
      font-weight: 800;
      font-size: 56px;
      line-height: 1.2;
      background: linear-gradient(135deg, #c89efc, #f5a623);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 24px;
    }

    .hero-desc {
      font-size: 20px;
      color: #B0B0C0;
      margin-bottom: 32px;
    }

    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, #7B2FFF, #F5A623);
      border: none;
      color: white;
      padding: 14px 36px;
      border-radius: 8px;
      font-weight: 600;
      cursor: pointer;
      transition: transform 0.25s, box-shadow 0.25s;
      text-decoration: none;
    }

    .btn-primary:hover {
      transform: scale(1.05);
      box-shadow: 0 0 30px rgba(123,47,255,0.5);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid #7B2FFF;
      color: #7B2FFF;
      padding: 14px 36px;
      border-radius: 8px;
      font-weight: 600;
      transition: 0.25s;
      text-decoration: none;
    }

    .btn-outline:hover {
      background: #7B2FFF;
      color: white;
    }

    .hero-visual {
      position: relative;
      height: 500px;
    }

    .hero-bg-img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      border-radius: 24px;
      mask-image: linear-gradient(to bottom, black 80%, transparent);
    }

    /* 卡片通用 */
    .card-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
    }

    .service-card {
      background: #14141F;
      border-radius: var(--radius-card-tl) var(--radius-card-other) var(--radius-card-br) var(--radius-card-other);
      padding: 32px;
      border: 1px solid rgba(255,255,255,0.06);
      transition: all 0.3s;
      box-shadow: var(--shadow-card);
    }

    .service-card:hover {
      transform: translateY(-4px);
      background: #1A1A2E;
      box-shadow: var(--shadow-card-hover);
    }

    .card-icon {
      font-size: 40px;
      margin-bottom: 20px;
    Adult{Margin-top: 12px;}