/* roulang page: index */
:root {
      --primary: #0A1A2F;
      --secondary: #00E676;
      --accent: #FF6D00;
      --bg-deeper: #060E18;
      --card-bg: rgba(255,255,255,0.03);
      --border-light: rgba(255,255,255,0.08);
      --text-primary: #FFFFFF;
      --text-secondary: rgba(255,255,255,0.7);
      --text-muted: rgba(255,255,255,0.4);
      --radius-lg: 20px;
      --radius-md: 16px;
      --radius-sm: 12px;
      --shadow-card: 0 20px 35px rgba(0,0,0,0.5);
      --font-mono: 'Inter', 'SF Mono', 'Fira Code', monospace;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
      background: linear-gradient(135deg, #0A1A2F 0%, #0D2137 50%, #0A1A2F 100%);
      color: var(--text-primary);
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }
    /* 导航栏 */
    .nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(10,26,47,0.85);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(255,255,255,0.06);
      z-index: 1000;
      transition: background 0.3s ease, box-shadow 0.3s ease;
    }
    .nav.scrolled {
      background: rgba(10,26,47,0.96);
      box-shadow: 0 10px 30px rgba(0,0,0,0.6);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo {
      display: flex;
      align-items: baseline;
      gap: 8px;
      font-weight: 700;
      font-size: 1.7rem;
      letter-spacing: -0.5px;
      color: var(--text-primary);
      text-decoration: none;
    }
    .logo span {
      color: var(--secondary);
    }
    .logo .domain {
      font-size: 0.7rem;
      font-weight: 400;
      color: var(--text-muted);
      margin-left: 4px;
      align-self: flex-end;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }
    .nav-link {
      color: var(--text-secondary);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      transition: color 0.2s;
    }
    .nav-link:hover {
      color: var(--secondary);
    }
    .btn-primary {
      background: var(--secondary);
      color: #0A1A2F;
      font-weight: 700;
      padding: 12px 28px;
      border-radius: 50px;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: all 0.25s ease;
      box-shadow: 0 4px 12px rgba(0,230,118,0.3);
      border: none;
      cursor: pointer;
      font-size: 0.95rem;
    }
    .btn-primary:hover {
      box-shadow: 0 6px 22px rgba(0,230,118,0.65);
      transform: translateY(-1px);
      background: #00ff84;
    }
    .btn-outline {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.3);
      color: white;
      padding: 12px 28px;
      border-radius: 50px;
      font-weight: 600;
      text-decoration: none;
      transition: all 0.25s;
      backdrop-filter: blur(4px);
    }
    .btn-outline:hover {
      border-color: var(--secondary);
      color: var(--secondary);
      background: rgba(0,230,118,0.08);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: transparent;
      border: none;
      cursor: pointer;
    }
    .hamburger span {
      width: 26px;
      height: 2px;
      background: white;
      border-radius: 6px;
      transition: 0.2s;
    }
    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      padding-top: 72px;
      position: relative;
      overflow: hidden;
    }
    .hero-bg {
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.25;
      z-index: 0;
    }
    .hero .container {
      display: flex;
      align-items: center;
      gap: 60px;
      position: relative;
      z-index: 2;
      flex-wrap: wrap;
    }
    .hero-content {
      flex: 1 1 500px;
    }
    .hero-tag {
      display: inline-block;
      background: rgba(0,230,118,0.12);
      color: var(--secondary);
      padding: 8px 18px;
      border-radius: 50px;
      font-size: 0.9rem;
      font-weight: 500;
      border-bottom: 2px solid var(--secondary);
      margin-bottom: 24px;
    }
    .hero h1 {
      font-size: clamp(2.8rem, 5vw, 3.8rem);
      font-weight: 800;
      letter-spacing: -0.02em;
      line-height: 1.15;
      margin-bottom: 24px;
    }
    .hero h1 .highlight {
      color: var(--secondary);
    }
    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-secondary);
      margin-bottom: 40px;
      max-width: 550px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .hero-visual {
      flex: 1 1 450px;
      background: rgba(10,26,47,0.6);
      backdrop-filter: blur(18px);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 20px;
      box-shadow: var(--shadow-card);
    }
    .hero-visual img {
      width: 100%;
      border-radius: 16px;
      display: block;
    }
    .scroll-indicator {
      position: absolute;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      color: var(--secondary);
      font-size: 2rem;
      animation: bounce 2s infinite;
    }
    @keyframes bounce {
      0%,20%,50%,80%,100%{transform:translateX(-50%) translateY(0);}
      40%{transform:translateX(-50%) translateY(-10px);}
      60%{transform:translateX(-50%) translateY(-5px);}
    }
    /* 板块通用 */
    section {
      padding: 100px 0;
      position: relative;
    }
    .section-header {
      text-align: center;
      margin-bottom: 70px;
    }
    .section-header h2 {
      font-size: 2.4rem;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .glass-card {
      background: rgba(255,255,255,0.03);
      backdrop-filter: blur(16px);
      border: 1px solid rgba(255,255,255,0.06);
      border-radius: var(--radius-md);
      padding: 32px;
      transition: all 0.3s ease;
    }
    .glass-card:hover {
      transform: translateY(-6px);
      border-color: rgba(0,230,118,0.25);
      box-shadow: 0 20px 40px rgba(0,230想要的118,0.15);
    }
    /* 优势区交错 */
    .advantage-row {
      display: flex;
      align-items: center;
      gap: 50px;
      margin-bottom: 80px;
      flex-wrap: wrap;
    }
    .adv-text {
      flex: 1;
    }
    .adv-img {
      flex: 1;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-light);
    }
    .adv-img img {
      width: 100%;
      display: block;
    }
    /* 矩阵 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 28px;
    }
    .feature-icon {
      font-size: 2.3rem;
      color: var(--secondary);
      margin-bottom: 20px;
    }
    /* 场景滑动 */
    .scene-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      scroll-snap-type: x mandatory;
      padding-bottom: 15px;
    }
    .scene-card {
      min-width: 300px;
      flex: 0 0 32%;
      scroll-snap-align: start;
    }
    /* 数字动态 */
    .stat-grid {
      display: flex;
      justify-content: space-around;
      text-align: center;
      flex-wrap: wrap;
      gap: 30px;
    }
    .stat-number {
      font-family: var(--font-mono);
      font-size: 3.2rem;
      font-weight: 700;
      color: var(--secondary);
    }
    /* 案例2x2 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(2,1fr);
      gap: 28px;
    }
    .progress-circle {
      width: 80px;
      height: 80px;
      margin: 0 auto;
    }
    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 22px 0;
    }
    .faq-question {
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }
    /* 表单 */
    .cta-form input {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.15);
      padding: 14px;
      border-radius: 12px;
      color: white;
      width: 100%;
    }
    footer {
      background: #060E18;
      padding: 60px 0 30px;
    }
    @media (max-width: 1024px) {
      .grid-3 { grid-template-columns: repeat(2,1fr); }
      .case-grid { grid-template-columns: 1fr; }
      .nav-menu { display: none; }
      .hamburger { display: flex; }
    }
    @media (max-width: 640px) {
      .container { padding: 0 20px; }
      .hero-content, .adv-text, .adv-img { flex: 1 1 100%; }
      .grid-3 { grid-template-columns: 1fr; }
      .stat-number { font-size: 2.5rem; }
    }