/* roulang page: index */
:root {
      --primary-purple: #7B2FF7;
      --primary-cyan: #00F0FF;
      --bg-deep: #0E0E12;
      --bg-card: #1A1A24;
      --text-light: #E0E0F0;
      --text-muted: #A0A0B0;
      --text-dim: #888;
      --border-subtle: rgba(0,240,255,0.15);
      --shadow-card: 0 8px 20px rgba(0,0,0,0.5);
      --shadow-glow: 0 0 14px rgba(123,47,247,0.5);
      --radius-lg: 20px;
      --radius-card: 16px;
      --radius-pill: 40px;
      --transition: all 0.25s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      background-color: var(--bg-deep);
      color: var(--text-light);
      line-height: 1.7;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, input, textarea {
      font-family: inherit;
    }
    /* 导航栏双层结构 */
    #masthead {
      background: rgba(14,14,18,0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255,255,255,0.08);
      position: sticky;
      top: 0;
      z-index: 50;
    }
    .nav-brand {
      font-size: 26px;
      font-weight: 800;
      background: linear-gradient(135deg, var(--primary-purple) 0%, var(--primary-cyan) 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: 1px;
    }
    .nav-upper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 14px 0;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .search-icon {
      font-size: 20px;
      color: #ccc;
      cursor: pointer;
      transition: var(--transition);
    }
    .search-icon:hover {
      color: var(--primary-cyan);
    }
    .btn-primary {
      background: var(--primary-purple);
      color: white;
      border: none;
      padding: 12px 28px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      font-size: 15px;
      cursor: pointer;
      transition: var(--transition);
      box-shadow: 0 4px 12px rgba(123,47,247,0.4);
      display: inline-block;
      text-align: center;
    }
    .btn-primary:hover {
      background: #9D5CFA;
      box-shadow: 0 0 18px rgba(123,47,247,0.7);
      color: white;
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary-cyan);
      color: var(--primary-cyan);
      padding: 10px 26px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
      background: rgba(0,240,255,0.02);
    }
    .btn-outline:hover {
      background: rgba(0,240,255,0.15);
      color: white;
      border-color: white;
    }
    .nav-pills {
      display: flex;
      flex-wrap: nowrap;
      overflow-x: auto;
      gap: 8px;
      padding: 8px 0 14px;
      -webkit-overflow-scrolling: touch;
      scrollbar-width: none;
    }
    .nav-pills::-webkit-scrollbar {
      display: none;
    }
    .pill {
      background: transparent;
      color: #ccc;
      padding: 8px 18px;
      border-radius: 30px;
      font-size: 14px;
      font-weight: 500;
      white-space: nowrap;
      transition: var(--transition);
      border: 1px solid transparent;
      cursor: pointer;
    }
    .pill:hover {
      background: rgba(0,240,255,0.1);
      color: var(--primary-cyan);
    }
    .pill.active {
      background: var(--primary-purple);
      color: white;
      border-color: var(--primary-purple);
      box-shadow: 0 4px 12px rgba(123,47,247,0.5);
    }
    /* Hero */
    #hero {
      background: linear-gradient(0deg, rgba(14,14,18,0.7) 0%, rgba(14,14,18,0.5) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 85vh;
      display: flex;
      align-items: center;
      padding: 60px 0;
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 48px;
      flex-wrap: wrap;
    }
    .hero-left {
      flex: 1 1 400px;
    }
    .hero-right {
      flex: 1 1 400px;
      display: flex;
      justify-content: center;
    }
    .hero-right img {
      max-height: 380px;
      border-radius: var(--radius-lg);
      box-shadow: 0 20px 40px rgba(0,240,255,0.2);
    }
    h1 {
      font-size: 52px;
      font-weight: 800;
      background: linear-gradient(to right, var(--primary-purple), var(--primary-cyan));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 20px;
      line-height: 1.2;
    }
    .hero-sub {
      font-size: 18px;
      color: #B0B0C0;
      margin-bottom: 36px;
      max-width: 500px;
    }
    .hero-btns {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }
    /* 指标看板 */
    .section-pad {
      padding: 80px 0;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 28px;
    }
    .metric-card {
      background: var(--bg-card);
      border-radius: var(--radius-card);
      padding: 28px 20px;
      border: 1px solid var(--border-subtle);
      text-align: center;
      transition: var(--transition);
    }
    .metric-card:hover {
      border-color: var(--primary-cyan);
      transform: translateY(-4px);
      box-shadow: 0 12px 24px rgba(123,47,247,0.2);
    }
    .metric-num {
      font-size: 42px;
      font-weight: 700;
      color: var(--primary-cyan);
      font-family: 'DIN Alternate', 'Roboto Mono', monospace;
      margin-bottom: 8px;
    }
    .trend-icon {
      font-size: 20px;
      margin-left: 6px;
    }
    /* 服务矩阵 2x3 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 28px;
    }
    .service-card {
      background: var(--bg-card);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      border: 1px solid var(--border-subtle);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      border-color: var(--primary-cyan);
      box-shadow: 0 16px 30px rgba(0,240,255,0.1);
      transform: translateY(-5px);
    }
    .service-icon {
      font-size: 40px;
      color: var(--primary-cyan);
      margin-bottom: 18px;
    }
    .service-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--primary-purple);
      margin-bottom: 10px;
    }
    .compare-container {
      display: flex;
      gap: 36px;
      flex-wrap: wrap;
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      padding: 40px;
      border: 1px solid var(--border-subtle);
    }
    .compare-col {
      flex: 1;
    }
    .progress-bar {
      background: #2A2A36;
      height: 8px;
      border-radius: 10px;
      margin: 12px 0;
      overflow: hidden;
    }
    .progress-fill {
      height: 100%;
      background: var(--primary-cyan);
      width: 0%;
    }
    /* FAQ */
    .accordion-item {
      background: var(--bg-card);
      border-radius: 12px;
      margin-bottom: 14px;
      border: 1px solid var(--border-subtle);
    }
    .accordion-title {
      background: transparent;
      color: #E0E0F0;
      padding: 18px 24px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-left: 4px solid transparent;
      transition: var(--transition);
    }
    .accordion-item.is-active .accordion-title {
      border-left: 4px solid var(--primary-purple);
      color: white;
    }
    .accordion-content {
      padding: 0 24px 20px;
      color: #A0A0B0;
    }
    /* 表单 */
    .contact-form {
      background: rgba(26,26,36,0.9);
      backdrop-filter: blur(8px);
      border-radius: var(--radius-lg);
      padding: 40px;
      border: 1px solid var(--border-subtle);
    }
    .form-input {
      background: #1A1A24;
      border: 1px solid #333;
      color: white;
      border-radius: 10px;
      padding: 14px;
      margin-bottom: 20px;
    }
    .form-input:focus {
      border-color: var(--primary-cyan);
      outline: none;
      box-shadow: 0 0 8px rgba(0,240,255,0.3);
    }
    footer {
      background: #0A0A0E;
      color: #888;
      padding: 50px 0 20px;
    }
    @media (max-width: 1024px) {
      .metrics-grid { grid-template-columns: repeat(2,1fr); }
      .service-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      h1 { font-size: 36px; }
      .hero-grid { flex-direction: column; }
      .metrics-grid { grid-template-columns: 1fr 1fr; }
      .service-grid { grid-template-columns: 1fr; }
      .compare-container { flex-direction: column; }
      .section-pad { padding: 48px 0; }
    }