/* roulang page: index */
:root {
      --primary: #FF4D2E;
      --primary-light: #FF7B3D;
      --primary-soft: #FF9F4B;
      --secondary-bg: #1A1A2E;
      --accent: #00E5A0;
      --bg-deep: #0B0B14;
      --card-bg: #141428;
      --card-highlight: #1E1E3A;
      --text-white: #FFFFFF;
      --text-body: #B0B0C0;
      --text-muted: #6B6B80;
      --border-subtle: rgba(255,255,255,0.06);
      --border-card: rgba(255,77,46,0.08);
      --shadow-card: 0 8px 32px rgba(255,77,46,0.15), 0 2px 8px rgba(0,0,0,0.4);
      --shadow-button: 0 4px 20px rgba(255,77,46,0.5);
      --radius-lg: 24px;
      --radius-md: 16px;
      --radius-sm: 8px;
      --transition: all 0.25s ease;
    }
    
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    body {
      font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      background-color: var(--bg-deep);
      color: var(--text-body);
      line-height: 1.6;
      overflow-x: hidden;
    }
    
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background-color: rgba(11, 11, 20, 0.92);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border-subtle);
      z-index: 1000;
      padding: 16px 0;
      transition: var(--transition);
    }
    
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    .logo {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
      text-decoration: none;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo i {
      font-size: 2rem;
      color: var(--primary-light);
    }
    
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    
    .nav-links a {
      color: var(--text-body);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      position: relative;
      padding: 4px 0;
      transition: var(--transition);
    }
    
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
    }
    
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width 0.25s ease;
    }
    
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }
    
    .btn-nav {
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
      color: white !important;
      padding: 10px 24px !important;
      border-radius: var(--radius-sm);
      font-weight: 700;
      letter-spacing: 0.5px;
      box-shadow: 0 4px 12px rgba(255,77,46,0.4);
      transition: var(--transition);
    }
    .btn-nav:hover {
      box-shadow: var(--shadow-button);
      transform: translateY(-1px);
    }
    
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: transparent;
      border: none;
    }
    .hamburger span {
      width: 28px;
      height: 3px;
      background: var(--text-white);
      border-radius: 3px;
      transition: var(--transition);
    }
    
    /* 移动端菜单 */
    .mobile-menu {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: var(--bg-deep);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 28px;
      transform: translateX(100%);
      transition: transform 0.4s ease;
      z-index: 999;
    }
    .mobile-menu.active {
      transform: translateX(0);
    }
    .mobile-menu a {
      color: var(--text-white);
      font-size: 1.5rem;
      font-weight: 600;
      text-decoration: none;
    }
    .mobile-menu .btn-nav {
      margin-top: 20px;
      font-size: 1.2rem;
    }
    
    /* 板块通用 */
    section {
      padding: 100px 0;
    }
    
    .section-title {
      font-size: clamp(28px, 4vw, 48px);
      font-weight: 700;
      color: var(--text-white);
      margin-bottom: 24px;
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .section-title::before {
      content: '';
      display: inline-block;
      width: 4px;
      height: 40px;
      background: var(--primary);
      border-radius: 2px;
    }
    
    /* Hero */
    .hero {
      padding-top: 140px;
      padding-bottom: 100px;
      display: flex;
      align-items: center;
      gap: 40px;
    }
    .hero-content {
      flex: 1;
    }
    .hero h1 {
      font-size: clamp(36px, 5vw, 64px);
      font-weight: 800;
      letter-spacing: -0.02em;
      line-height: 1.1;
      color: var(--text-white);
      margin-bottom: 24px;
    }
    .hero h1 span {
      background: linear-gradient(135deg, var(--primary), var(--primary-soft));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-body);
      margin-bottom: 32px;
      max-width: 500px;
    }
    .stats-row {
      display: flex;
      gap: 32px;
      margin-bottom: 40px;
    }
    .stat-item {
      text-align: left;
    }
    .stat-number {
      font-size: 2.2rem;
      font-weight: 900;
      background: linear-gradient(135deg, var(--accent), #00c98b);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .stat-label {
      color: var(--text-muted);
      font-size: 0.9rem;
    }
    .cta-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-weight: 700;
      text-decoration: none;
      letter-spacing: 0.5px;
      box-shadow: 0 4px 16px rgba(255,77,46,0.4);
      transition: var(--transition);
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      box-shadow: var(--shadow-button);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      color: var(--primary);
      border: 2px solid var(--primary);
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-weight: 700;
      text-decoration: none;
      transition: var(--transition);
    }
    .btn-outline:hover {
      background: rgba(255,77,46,0.1);
    }
    .hero-visual {
      flex: 1;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 400px;
      border-radius: var(--radius-lg);
      position: relative;
      overflow: hidden;
      box-shadow: 0 20px 40px rgba(0,0,0,0.6);
    }
    
    /* 优势非对称栅格 */
    .advantages-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr;
      gap: 24px;
      margin-top: 40px;
    }
    .adv-card {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      padding: 32px;
      border: 1px solid var(--border-card);
      transition: var(--transition);
    }
    .adv-card.large {
      grid-row: span 2;
    }
    .adv-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-card);
    }
    .adv-icon {
      font-size: 2rem;
      color: var(--accent);
      margin-bottom: 16px;
    }
    .adv-card h3 {
      color: var(--text-white);
      font-size: 1.5rem;
      margin-bottom: 12px;
    }
    
    /* 产品左右交替 */
    .product-row {
      display: flex;
      align-items: center;
      gap: 60px;
      margin-bottom: 80px;
    }
    .product-row.reverse {
      flex-direction: row-reverse;
    }
    .product-img {
      flex: 1;
      background: url('/assets/images/coverpic/cover-2.webp') center/cover no-repeat;
      min-height: 300px;
      border-radius: var(--radius-lg);
    }
    .product-info {
      flex: 1;
    }
    
    /* 场景卡片 */
    .scenarios-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 24px;
      margin-top: 40px;
    }
    .scenario-card {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      padding: 24px;
      transition: var(--transition);
    }
    .scenario-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-card);
    }
    
    /* 数据墙 */
    .marquee-wrapper {
      overflow: hidden;
      margin: 40px 0;
    }
    .marquee {
      display: flex;
      gap: 24px;
      animation: marquee 20s linear infinite;
    }
    @keyframes marquee {
      0% { transform: translateX(0); }
      100% { transform: translateX(-50%); }
    }
    .badge-card {
      background: var(--card-highlight);
      border-radius: var(--radius-md);
      padding: 20px 32px;
      text-align: center;
      min-width: 180px;
    }
    
    /* FAQ */
    .faq-item {
      background: var(--card-bg);
      border-radius: 12px;
      margin-bottom: 12px;
      border: 1px solid rgba(255,255,255,0.04);
    }
    .faq-question {
      padding: 20px 24px;
      font-weight: 700;
      color: var(--text-white);
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }
    .faq-answer {
      padding: 0 24px 20px;
      color: var(--text-body);
      display: none;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    
    /* CTA */
    .cta-section {
      background: var(--secondary-bg);
      border-radius: var(--radius-lg);
      padding: 60px;
      text-align: center;
    }
    .form-row {
      display: flex;
      gap: 16px;
      margin: 30px 0;
      flex-wrap: wrap;
    }
    .form-row input {
      flex: 1;
      background: var(--bg-deep);
      border: 1px solid #2A2A40;
      border-radius: var(--radius-sm);
      padding: 14px;
      color: white;
    }
    
    footer {
      background: var(--bg-deep);
      border-top: 1px solid var(--border-subtle);
      padding: 60px 0 30px;
    }
    
    @media (max-width: 1024px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .hero { flex-direction: column; }
      .advantages-grid { grid-template-columns: 1fr; }
      .product-row { flex-direction: column; }
    }
    @media (max-width: 768px) {
      section { padding: 60px 0; }
    }