/* roulang page: index */
:root {
      --deep-violet: #2D1B4E;
      --electric-magenta: #E5007E;
      --magenta-hover: #FF1A8C;
      --data-cyan: #00E5FF;
      --bg-deep: #0A0A0F;
      --card-gray: #14141F;
      --text-primary: #FFFFFF;
      --text-secondary: #E0E0E0;
      --text-muted: #A0A0B0;
      --border-subtle: rgba(229, 0, 126, 0.15);
      --border-active: rgba(229, 0, 126, 0.6);
      --shadow-magenta: rgba(229, 0, 126, 0.25);
      --shadow-card: 0 8px 30px rgba(229, 0, 126, 0.1);
      --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
      --container-max: 1280px;
      --radius-sm: 4px;
      --radius-md: 8px;
      --transition: 0.3s ease;
    }
    
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    html {
      scroll-behavior: smooth;
    }
    
    body {
      background-color: var(--bg-deep);
      font-family: var(--font-sans);
      color: var(--text-secondary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    
    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* 导航栏 */
    .nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      backdrop-filter: blur(12px);
      background-color: rgba(10, 10, 15, 0.75);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      transition: background-color 0.25s ease, box-shadow 0.25s ease;
    }
    
    .nav.scrolled {
      background-color: rgba(10, 10, 15, 0.96);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
      border-bottom-color: rgba(229, 0, 126, 0.2);
    }
    
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    
    .logo {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--text-primary);
      letter-spacing: -0.5px;
      text-decoration: none;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    
    .logo i {
      color: var(--electric-magenta);
      font-size: 2rem;
    }
    
    .nav-links {
      display: flex;
      align-items: center;
      gap: 36px;
    }
    
    .nav-links a {
      color: #D0D0E0;
      text-decoration: none;
      font-weight: 500;
      font-size: 1rem;
      position: relative;
      padding: 6px 0;
      transition: color 0.2s;
    }
    
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--electric-magenta);
      transition: width 0.25s ease;
    }
    
    .nav-links a:hover {
      color: var(--electric-magenta);
    }
    
    .nav-links a:hover::after {
      width: 100%;
    }
    
    .btn-primary {
      background: var(--electric-magenta);
      color: white;
      border: none;
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 0.95rem;
      letter-spacing: 0.3px;
      cursor: pointer;
      transition: background 0.2s, box-shadow 0.2s;
      text-decoration: none;
      display: inline-block;
    }
    
    .btn-primary:hover {
      background: var(--magenta-hover);
      box-shadow: 0 0 22px rgba(229, 0, 126, 0.55);
    }
    
    .btn-outline {
      background: transparent;
      border: 1px solid var(--electric-magenta);
      color: var(--electric-magenta);
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      transition: 0.25s;
      text-decoration: none;
      display: inline-block;
    }
    
    .btn-outline:hover {
      background: var(--electric-magenta);
      color: white;
    }
    
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: transparent;
      border: none;
    }
    
    .hamburger span {
      width: 26px;
      height: 2.5px;
      background: white;
      border-radius: 2px;
      transition: 0.25s;
    }
    
    /* 移动端导航面板 */
    .mobile-menu {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: rgba(10, 10, 15, 0.98);
      backdrop-filter: blur(20px);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 32px;
      transform: translateY(-100%);
      transition: transform 0.4s ease;
      z-index: 999;
    }
    
    .mobile-menu.active {
      transform: translateY(0);
    }
    
    .mobile-menu a {
      color: #E0E0E0;
      font-size: 1.8rem;
      font-weight: 600;
      text-decoration: none;
    }
    
    /* Hero */
    .hero {
      padding: 140px 0 100px;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      display: flex;
      align-items: center;
      min-height: 90vh;
    }
    
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 40%, rgba(45, 27, 78, 0.7) 0%, #0A0A0F 95%);
    }
    
    .hero-content {
      position: relative;
      display: flex;
      align-items: center;
      gap: 50px;
      flex-wrap: wrap;
    }
    
    .hero-text {
      flex: 1 1 500px;
    }
    
    .hero h1 {
      font-size: 56px;
      font-weight: 800;
      letter-spacing: -1.5px;
      line-height: 1.1;
      color: white;
      margin-bottom: 20px;
    }
    
    .hero-sub {
      font-size: 1.2rem;
      color: #D0D0E0;
      margin-bottom: 36px;
      max-width: 550px;
    }
    
    .hero-visual {
      flex: 1 1 400px;
      display: flex;
      justify-content: center;
    }
    
    .dashboard-mock {
      background: rgba(20, 20, 31, 0.7);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(229, 0, 126, 0.25);
      border-radius: 16px;
      padding: 24px;
      box-shadow: 0 0 40px rgba(229, 0, 126, 0.2);
    }
    
    /* 区块通用 */
    section {
      padding: 90px 0;
    }
    
    .section-title {
      font-size: 40px;
      font-weight: 700;
      letter-spacing: -0.5px;
      color: white;
      margin-bottom: 16px;
      position: relative;
    }
    
    .title-decor {
      width: 60px;
      height: 3px;
      background: var(--electric-magenta);
      margin-bottom: 40px;
    }
    
    /* 数据服务卡片 */
    .data-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
      margin-top: 20px;
    }
    
    .data-card {
      background: var(--card-gray);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 26px 22px;
      display: flex;
      align-items: center;
      gap: 18px;
      transition: all 0.3s;
    }
    
    .data-card:hover {
      border-color: var(--border-active);
      box-shadow: var(--shadow-card);
      transform: translateY(-4px);
    }
    
    .live-dot {
      width: 12px;
      height: 12px;
      background: var(--data-cyan);
      border-radius: 50%;
      box-shadow: 0 0 14px var(--data-cyan);
      flex-shrink: 0;
    }
    
    /* 核心优势 */
    .advantage-row {
      display: flex;
      gap: 50px;
      flex-wrap: wrap;
    }
    
    .stats-board {
      background: var(--card-gray);
      border-radius: 16px;
      padding: 32px;
      flex: 1 1 400px;
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    
    .advantage-list {
      flex: 1 1 400px;
    }
    
    .adv-item {
      display: flex;
      gap: 16px;
      align-items: flex-start;
      padding: 18px 0;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    
    /* 行业方案 */
    .solution-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }
    
    .solution-card {
      background-size: cover;
      background-position: center;
      border-radius: 12px;
      height: 280px;
      position: relative;
      overflow: hidden;
      display: flex;
      align-items: flex-end;
    }
    
    .solution-card::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(0deg, rgba(10,10,15,0.85) 20%, transparent);
      transition: 0.3s;
    }
    
    .solution-card:hover::before {
      background: linear-gradient(0deg, rgba(10,10,15,0.95) 30%, transparent);
    }
    
    .solution-info {
      position: relative;
      padding: 32px;
      color: white;
    }
    
    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px 40px;
    }
    
    .faq-item {
      border-bottom: 1px solid rgba(255,255,255,0.08);
      padding: 16px 0;
    }
    
    .faq-question {
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
      color: white;
    }
    
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      color: #B0B0C0;
    }
    
    /* 联系CTA */
    .cta-block {
      background: #1A1028;
      text-align: center;
    }
    
    /* 页脚 */
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }
    
    @media (max-width: 1024px) {
      .data-grid { grid-template-columns: 1fr 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .hero h1 { font-size: 38px; }
      .section-title { font-size: 30px; }
      .data-grid, .solution-grid, .faq-grid { grid-template-columns: 1fr; }
      .hero-content { flex-direction: column; }
    }