/* roulang page: index */
:root {
      --deep-space: #0B0C10;
      --deep-space-rgb: 11, 12, 16;
      --nebula-green: #45E3B2;
      --nebula-green-rgb: 69, 227, 178;
      --aurora-orange: #F9844A;
      --aurora-orange-rgb: 249, 132, 74;
      --title-white: #F0F2F5;
      --body-gray: #B0B7C3;
      --muted-gray: #6B7280;
      --card-bg: rgba(18, 22, 28, 0.85);
      --card-border: rgba(69, 227, 178, 0.15);
      --card-shadow: 0 8px 32px rgba(0,0,0,0.45), 0 0 1px rgba(69,227,178,0.25);
      --border-radius-lg: 16px;
      --border-radius-pill: 48px;
      --font-heading: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
      --font-body: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
      --transition: 0.25s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: var(--font-body);
      background-color: var(--deep-space);
      color: var(--body-gray);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      background-image: radial-gradient(rgba(69, 227, 178, 0.05) 1px, transparent 1px);
      background-size: 40px 40px;
      position: relative;
    }

    body::before {
      content: "";
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><circle cx="15" cy="20" r="0.8" fill="white" opacity="0.3"/><circle cx="88" cy="45" r="0.6" fill="white" opacity="0.25"/><circle cx="40" cy="85" r="1" fill="white" opacity="0.2"/><circle cx="72" cy="12" r="0.7" fill="white" opacity="0.35"/><circle cx="5" cy="60" r="0.5" fill="white" opacity="0.2"/></svg>');
      background-size: 180px 180px;
      pointer-events: none;
      z-index: 0;
    }

    h1, h2, h3, h4 {
      font-family: var(--font-heading);
      color: var(--title-white);
      font-weight: 700;
      line-height: 1.2;
    }

    h2 {
      font-size: 2.5rem;
      margin-bottom: 1.5rem;
      letter-spacing: -0.02em;
    }

    .container-custom {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 2rem;
    }

    /* 浮动导航 Dock */
    .navbar-dock {
      position: fixed;
      top: 16px;
      left: 50%;
      transform: translateX(-50%);
      width: auto;
      max-width: 900px;
      background: rgba(13, 15, 20, 0.92);
      backdrop-filter: blur(4px);
      border: 1px solid rgba(69, 227, 178, 0.2);
      border-radius: var(--border-radius-pill);
      padding: 0.5rem 1.5rem;
      z-index: 1000;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1.5rem;
      box-shadow: 0 10px 30px rgba(0,0,0,0.6);
    }

    .logo-text {
      font-family: var(--font-heading);
      font-weight: 700;
      font-size: 1.4rem;
      color: var(--nebula-green);
      letter-spacing: 0.05em;
      white-space: nowrap;
    }

    .nav-links {
      display: flex;
      gap: 1.8rem;
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .nav-links a {
      color: var(--body-gray);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      transition: color var(--transition);
      white-space: nowrap;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--nebula-green);
    }

    .btn-cta-sm {
      background: transparent;
      border: 1.5px solid var(--nebula-green);
      color: var(--nebula-green);
      padding: 0.4rem 1.2rem;
      border-radius: 40px;
      font-weight: 600;
      font-size: 0.9rem;
      transition: all var(--transition);
      white-space: nowrap;
    }

    .btn-cta-sm:hover {
      background: rgba(69, 227, 178, 0.1);
      color: #5FF0C5;
      border-color: #5FF0C5;
    }

    /* 主CTA按钮 */
    .btn-primary-cta {
      background: var(--nebula-green);
      border: none;
      color: var(--deep-space);
      font-weight: 700;
      padding: 0.9rem 2.4rem;
      border-radius: 40px;
      font-size: 1.1rem;
      transition: all var(--transition);
      box-shadow: 0 4px 15px rgba(69, 227, 178, 0.3);
      display: inline-block;
      text-decoration: none;
    }

    .btn-primary-cta:hover {
      background: #5FF0C5;
      box-shadow: 0 8px 22px rgba(69, 227, 178, 0.5);
      color: #0B0C10;
    }

    .btn-secondary-outline {
      background: transparent;
      border: 1.5px solid var(--nebula-green);
      color: var(--nebula-green);
      padding: 0.6rem 1.6rem;
      border-radius: 40px;
      font-weight: 600;
      transition: all var(--transition);
      text-decoration: none;
      display: inline-block;
    }

    .btn-secondary-outline:hover {
      background: rgba(69, 227, 178, 0.1);
      color: #5FF0C5;
    }

    /* Hero 看板 */
    .hero-section {
      padding: 7rem 0 5rem;
      position: relative;
      z-index: 2;
      min-height: 90vh;
      display: flex;
      align-items: center;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-repeat: no-repeat;
      background-attachment: fixed;
      background-blend-mode: soft-light;
    }

    .hero-content {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 3rem;
    }

    .hero-left {
      flex: 1 1 45%;
    }

    .hero-right {
      flex: 1 1 50%;
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 1.5rem;
    }

    .metric-card {
      background: var(--card-bg);
      backdrop-filter: blur(8px);
      border: 1px solid var(--card-border);
      border-radius: var(--border-radius-lg);
      padding: 1.8rem 1.2rem;
      box-shadow: var(--card-shadow);
      text-align: center;
      transition: all var(--transition);
    }

    .metric-card:hover {
      border-color: rgba(69, 227, 178, 0.5);
      transform: translateY(-4px);
    }

    .metric-number {
      font-size: 2.4rem;
      font-weight: 700;
      color: var(--aurora-orange);
      font-variant-numeric: tabular-nums;
      letter-spacing: -0.02em;
    }

    .metric-label {
      font-weight: 600;
      color: var(--body-gray);
      margin-top: 0.5rem;
    }

    /* 服务卡片网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.8rem;
      margin-top: 2rem;
    }

    .service-card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--border-radius-lg);
      padding: 2rem 1.5rem;
      box-shadow: var(--card-shadow);
      transition: all var(--transition);
      display: flex;
      flex-direction: column;
    }

    .service-card:hover {
      border-color: rgba(69, 227, 178, 0.6);
      transform: translateY(-6px);
      box-shadow: 0 15px 35px rgba(0,0,0,0.7), 0 0 8px rgba(69,227,178,0.4);
    }

    .service-img {
      width: 100%;
      height: 180px;
      object-fit: cover;
      border-radius: 12px;
      margin-bottom: 1.5rem;
      background: #1A1D24;
    }

    /* 对比区块 */
    .comparison-row {
      display: flex;
      flex-wrap: wrap;
      gap: 2rem;
      margin-top: 2rem;
    }

    .compare-card {
      flex: 1 1 280px;
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--border-radius-lg);
      padding: 2rem;
      box-shadow: var(--card-shadow);
    }

    .check-green {
      color: var(--nebula-green);
      margin-right: 0.5rem;
    }

    .cross-gray {
      color: var(--muted-gray);
      margin-right: 0.5rem;
    }

    /* FAQ */
    .accordion-item {
      background: transparent;
      border: 1px solid rgba(69, 227, 178, 0.2);
      border-radius: 12px;
      margin-bottom: 1rem;
    }

    .accordion-button {
      background: rgba(18,22,28,0.9);
      color: var(--title-white);
      font-weight: 600;
      border-radius: 12px;
      padding: 1.2rem 1.8rem;
    }

    .accordion-button:not(.collapsed) {
      background: rgba(69, 227, 178, 0.08);
      color: var(--nebula-green);
      box-shadow: none;
    }

    .accordion-body {
      color: var(--body-gray);
      padding: 1.2rem 1.8rem;
    }

    /* 表单 */
    .form-control-dark {
      background: rgba(18,22,28,0.9);
      border: 1px solid rgba(69,227,178,0.3);
      color: white;
      border-radius: 30px;
      padding: 0.7rem 1.4rem;
    }

    .form-control-dark:focus {
      border-color: var(--nebula-green);
      box-shadow: 0 0 8px rgba(69,227,178,0.4);
    }

    /* 页脚 */
    .footer-section {
      border-top: 1px solid rgba(69,227,178,0.15);
    }

    @media (max-width: 1200px) {
      .services-grid { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 992px) {
      .services-grid { grid-template-columns: repeat(2, 1fr); }
      .hero-right { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .navbar-dock {
        width: 95%;
        padding: 0.5rem 1rem;
        gap: 0.8rem;
        justify-content: space-between;
      }
      .nav-links { gap: 1rem; font-size: 0.8rem; }
      .logo-text { font-size: 1.1rem; }
      h2 { font-size: 2rem; }
      .services-grid { grid-template-columns: 1fr; }
      .hero-right { grid-template-columns: 1fr; }
      .hero-left { text-align: center; }
      .comparison-row { flex-direction: column; }
    }