/* roulang page: index */
:root {
      --primary: #6C3CF0;
      --primary-deep: #3A2EE0;
      --accent: #00F0FF;
      --bg-dark: #0B0E17;
      --bg-card: rgba(18,22,35,0.7);
      --text-white: #FFFFFF;
      --text-body: #B0C4E6;
      --border-glow: rgba(0,240,255,0.15);
      --radius-lg: 16px;
      --radius-md: 10px;
      --shadow-glow: 0 0 24px rgba(0,240,255,0.6);
      --shadow-card: 0 0 30px rgba(0,240,255,0.08);
      --font-numbers: 'Rajdhani', 'Inter', sans-serif;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      background: linear-gradient(135deg, #0B0E17 0%, #111624 100%);
      color: var(--text-body);
      line-height: 1.8;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    h1, h2, h3, h4 {
      font-weight: 700;
      color: var(--text-white);
      letter-spacing: 0.5px;
    }
    h1 {
      font-size: 48px;
      letter-spacing: 2px;
    }
    h2 {
      font-size: 36px;
      margin-bottom: 1.5rem;
    }
    h3 {
      font-size: 22px;
      font-weight: 600;
    }
    p {
      color: var(--text-body);
      margin-bottom: 1rem;
    }
    a {
      color: var(--accent);
      transition: 0.25s ease;
      text-decoration: none;
    }
    a:hover {
      color: #80f0ff;
      text-shadow: 0 0 8px rgba(0,240,255,0.6);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 按钮 */
    .btn-primary {
      background: linear-gradient(135deg, #00F0FF 0%, #00c8e0 100%);
      border: none;
      color: #0B0E17;
      font-weight: 700;
      font-size: 16px;
      padding: 14px 36px;
      border-radius: 10px;
      box-shadow: 0 0 24px rgba(0,240,255,0.65);
      letter-spacing: 1px;
      transition: all 0.3s ease;
      display: inline-block;
      text-align: center;
      cursor: pointer;
      font-family: inherit;
      min-height: 48px;
    }
    .btn-primary:hover {
      box-shadow: 0 0 40px rgba(0,240,255,0.9);
      transform: translateY(-2px);
      color: #0B0E17;
      background: linear-gradient(135deg, #30f5ff 0%, #00e0f5 100%);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--accent);
      color: var(--accent);
      font-weight: 600;
      font-size: 16px;
      padding: 14px 36px;
      border-radius: 10px;
      transition: all 0.3s ease;
      display: inline-block;
      text-align: center;
      cursor: pointer;
      font-family: inherit;
      min-height: 48px;
    }
    .btn-outline:hover {
      background: rgba(0,240,255,0.08);
      border-color: #80f0ff;
      color: #ffffff;
      box-shadow: 0 0 20px rgba(0,240,255,0.4);
    }
    /* 玻璃卡片 */
    .glass-card {
      background: rgba(18,22,35,0.7);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border: 1px solid rgba(0,240,255,0.15);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: 0 0 30px rgba(0,240,255,0.08), inset 0 1px 0 rgba(255,255,255,0.05);
      transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .glass-card:hover {
      transform: translateY(-6px);
      border-color: rgba(0,240,255,0.45);
      box-shadow: 0 0 40px rgba(0,240,255,0.2);
    }
    /* 导航 */
    .main-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 40;
      background: rgba(11,14,23,0.85);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(0,240,255,0.1);
      height: 72px;
      display: flex;
      align-items: center;
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .logo {
      font-size: 26px;
      font-weight: 700;
      color: white;
      letter-spacing: 2px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo i {
      color: var(--accent);
      font-size: 28px;
      filter: drop-shadow(0 0 8px var(--accent));
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      color: #B0C4E6;
      font-weight: 500;
      font-size: 16px;
      position: relative;
      padding: 8px 0;
      text-decoration: none;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent);
      box-shadow: 0 0 12px var(--accent);
      transition: width 0.3s ease;
    }
    .nav-links a:hover {
      color: var(--accent);
      text-shadow: 0 0 6px var(--accent);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      color: var(--accent);
      font-size: 28px;
      cursor: pointer;
    }
    /* 分屏 Hero */
    .hero-split {
      display: flex;
      min-height: 100vh;
      align-items: center;
      margin-top: 0;
      padding-top: 72px;
    }
    .hero-visual {
      width: 45%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .hero-visual::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(108,60,240,0.75) 0%, rgba(58,46,224,0.8) 100%);
      mix-blend-mode: overlay;
    }
    .hero-content {
      width: 55%;
      padding: 40px 60px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .hero-content h1 {
      font-size: 52px;
      margin-bottom: 20px;
      line-height: 1.2;
    }
    .hero-content .sub {
      font-size: 20px;
      color: #B0C4E6;
      margin-bottom: 40px;
    }
    .btn-group {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }
    /* 区块通用 */
    section {
      padding: 90px 0;
      position: relative;
    }
    .section-title {
      text-align: center;
      margin-bottom: 60px;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }
    .text-accent {
      color: var(--accent);
    }
    .number-highlight {
      font-family: var(--font-numbers);
      font-weight: 700;
      font-size: 48px;
      color: var(--accent);
    }
    /* 场景交错 */
    .scenario-row {
      display: flex;
      align-items: center;
      gap: 48px;
      margin-bottom: 64px;
    }
    .scenario-img {
      flex: 1;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: 0 0 25px rgba(0,240,255,0.25);
    }
    .scenario-text {
      flex: 1;
    }
    /* FAQ */
    .accordion-item {
      border-bottom: 1px solid rgba(0,240,255,0.2);
      margin-bottom: 12px;
    }
    .accordion-title {
      background: transparent;
      color: white;
      font-weight: 600;
      padding: 20px 8px;
      width: 100%;
      text-align: left;
      border: none;
      font-size: 18px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      padding: 0 8px;
      color: #B0C4E6;
    }
    .accordion-content.open {
      max-height: 300px;
      padding-bottom: 20px;
    }
    /* 页脚 */
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }
    @media (max-width: 1024px) {
      .hero-split {
        flex-direction: column;
        padding-top: 72px;
      }
      .hero-visual {
        width: 100%;
        min-height: 350px;
        order: -1;
      }
      .hero-content {
        width: 100%;
        padding: 30px;
      }
      h1 {
        font-size: 40px;
      }
      .grid-3, .grid-2 {
        grid-template-columns: 1fr;
      }
      .scenario-row {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(11,14,23,0.98);
        padding: 20px;
      }
      .nav-links.active {
        display: flex;
      }
      .menu-toggle {
        display: block;
      }
      .btn-group {
        flex-direction: column;
      }
      .btn-primary, .btn-outline {
        width: 100%;
      }
      section {
        padding: 60px 0;
      }
    }