/* roulang page: index */
:root {
      --deep-purple: #4C1D95;
      --electric-cyan: #06B6D4;
      --amber-gold: #F59E0B;
      --dark-bg-start: #0F0A1A;
      --dark-bg-end: #1A1033;
      --light-bg: #F8F9FA;
      --card-white: #FFFFFF;
      --text-dark: #1E1B4B;
      --text-body: #374151;
      --text-muted: #6B7280;
      --text-light-on-dark: #A5B4FC;
      --border-light: #E5E7EB;
      --card-radius-lg: 16px;
      --card-radius-md: 12px;
      --btn-radius: 8px;
      --capsule-radius: 50px;
      --transition-base: all 0.3s ease;
      --shadow-card: 0 4px 12px rgba(0,0,0,0.06);
      --shadow-hover: 0 12px 28px rgba(109,40,217,0.15);
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --font-number: "Inter", "SF Pro Display", sans-serif;
    }
    
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    html {
      scroll-behavior: smooth;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--light-bg);
      color: var(--text-body);
      line-height: 1.7;
      overflow-x: hidden;
    }
    
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* 导航区域 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      height: 72px;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: var(--transition-base);
      background-color: rgba(15,10,26,0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    
    .header-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: 1280px;
      padding: 0 24px;
    }
    
    .logo {
      display: flex;
      align-items: center;
      text-decoration: none;
      color: white;
      font-weight: 700;
      font-size: 1.5rem;
      letter-spacing: 1px;
    }
    
    .logo i {
      font-size: 1.8rem;
      color: var(--electric-cyan);
      margin-right: 10px;
    }
    
    .logo span {
      background: linear-gradient(135deg, #fff, #e0e7ff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 30px;
      list-style: none;
    }
    
    .nav-menu a {
      color: rgba(255,255,255,0.9);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      transition: var(--transition-base);
      position: relative;
      padding: 4px 0;
    }
    
    .nav-menu a:hover,
    .nav-menu a.active {
      color: var(--electric-cyan);
    }
    
    .nav-menu a::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0%;
      height: 3px;
      background-color: var(--electric-cyan);
      transition: width 0.25s ease;
    }
    
    .nav-menu a:hover::after,
    .nav-menu a.active::after {
      width: 100%;
    }
    
    .cta-capsule {
      background: linear-gradient(135deg, #F59E0B, #D97706);
      color: #0F0A1A !important;
      padding: 10px 24px !important;
      border-radius: var(--capsule-radius);
      font-weight: 700 !important;
      letter-spacing: 0.5px;
      box-shadow: 0 4px 12px rgba(245,158,11,0.4);
      transition: var(--transition-base);
      border: none !important;
    }
    
    .cta-capsule:hover {
      background: linear-gradient(135deg, #FBBF24, #F59E0B);
      box-shadow: 0 6px 18px rgba(245,158,11,0.6);
      color: #0F0A1A !important;
      transform: scale(1.02);
    }
    
    .mobile-bottom-nav {
      display: none;
    }
    
    /* Hero Section */
    .hero-section {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: radial-gradient(circle at 30% 40%, #2D1B4E, #0F0A1A 80%);
      position: relative;
      overflow: hidden;
      padding: 100px 0 60px;
    }
    
    .hero-grid-bg {
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.2;
      mix-blend-mode: overlay;
    }
    
    .hero-container {
      position: relative;
      z-index: 2;
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      max-width: 800px;
    }
    
    @media (max-width: 768px) {
      .hero-container {
        align-items: center;
        text-align: center;
      }
    }
    
    h1 {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1.15;
      color: white;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    
    .hero-subtitle {
      font-size: 1.125rem;
      color: #A5B4FC;
      margin-bottom: 32px;
      max-width: 580px;
    }
    
    .hero-cta-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    
    .btn-primary {
      background: linear-gradient(135deg, #6D28D9, #06B6D4);
      color: white;
      padding: 14px 32px;
      border-radius: 8px;
      font-weight: 600;
      text-decoration: none;
      display: inline-block;
      transition: var(--transition-base);
      border: none;
      box-shadow: 0 8px 16px rgba(6,182,212,0.25);
    }
    
    .btn-primary:hover {
      background: linear-gradient(135deg, #7C3AED, #22D3EE);
      box-shadow: 0 0 24px rgba(6,182,212,0.6);
      transform: scale(1.03);
    }
    
    .btn-secondary {
      background: transparent;
      border: 1.5px solid var(--electric-cyan);
      color: var(--electric-cyan);
      padding: 14px 32px;
      border-radius: 8px;
      font-weight: 600;
      text-decoration: none;
      transition: var(--transition-base);
    }
    
    .btn-secondary:hover {
      background: var(--electric-cyan);
      color: #0F0A1A;
    }
    
    .stats-badge-row {
      display: flex;
      gap: 32px;
      margin-top: 48px;
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(8px);
      border-radius: 16px;
      padding: 16px 28px;
      flex-wrap: wrap;
    }
    
    .stat-item {
      display: flex;
      flex-direction: column;
    }
    
    .stat-number {
      font-family: var(--font-number);
      font-size: 1.75rem;
      font-weight: 800;
      color: var(--amber-gold);
    }
    
    .stat-label {
      color: #cbd5e1;
      font-size: 0.9rem;
    }
    
    /* Section 通用 */
    .section {
      padding: 100px 0;
    }
    
    .section-title {
      font-size: 2.25rem;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 56px;
      padding-left: 18px;
      border-left: 5px solid var(--electric-cyan);
      line-height: 1.3;
    }
    
    /* 核心优势 不对称栅格 */
    .core-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr;
      gap: 24px;
    }
    
    .core-card {
      background: var(--card-white);
      border-radius: 16px;
      padding: 32px 28px;
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border-light);
      transition: var(--transition-base);
    }
    
    .core-card:hover {
      box-shadow: var(--shadow-hover);
      border-color: rgba(6,182,212,0.4);
      transform: translateY(-4px);
    }
    
    .core-card.large {
      grid-row: span 2;
    }
    
    .icon-badge {
      font-size: 2rem;
      color: #6D28D9;
      margin-bottom: 16px;
    }
    
    .card-title {
      font-size: 1.375rem;
      font-weight: 600;
      color: var(--text-dark);
      margin-bottom: 10px;
    }
    
    .micro-badge {
      font-family: var(--font-number);
      color: var(--electric-cyan);
      font-weight: 700;
      margin-top: 12px;
    }
    
    /* 产品横向滚动 */
    .products-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 20px;
      scrollbar-width: thin;
      scrollbar-color: #6D28D9 #E5E7EB;
    }
    
    .product-card {
      min-width: 280px;
      max-width: 300px;
      background: white;
      border-radius: 16px;
      box-shadow: 0 6px 16px rgba(0,0,0,0.05);
      transition: var(--transition-base);
      display: flex;
      flex-direction: column;
    }
    
    .product-card:hover {
      transform: translateY(-5px);
    }
    
    .product-img {
      height: 160px;
      background-size: cover;
      border-radius: 16px 16px 0 0;
      position: relative;
    }
    
    .tag {
      position: absolute;
      top: 12px;
      left: 12px;
      background: var(--amber-gold);
      color: #0F0A1A;
      font-weight: 700;
      font-size: 0.75rem;
      padding: 4px 12px;
      border-radius: 20px;
    }
    
    .product-info {
      padding: 20px;
    }
    
    .feature-list {
      list-style: none;
      font-size: 0.9rem;
      margin: 12px 0;
    }
    
    .feature-list i {
      color: var(--electric-cyan);
      margin-right: 6px;
    }
    
    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    
    .faq-item {
      background: white;
      border-radius: 12px;
      padding: 18px 24px;
      border: 1px solid #E5E7EB;
      cursor: pointer;
    }
    
    .faq-question {
      font-weight: 600;
      display: flex;
      justify-content: space-between;
    }
    
    /* 联系表单 */
    .contact-section {
      background: linear-gradient(135deg, #0F0A1A, #2D1B4E);
    }
    
    .contact-form {
      max-width: 600px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 18px;
    }
    
    .contact-form input, .contact-form select, .contact-form textarea {
      padding: 14px;
      border-radius: 10px;
      border: none;
      background: rgba(255,255,255,0.1);
      color: white;
    }
    
    .submit-btn {
      background: linear-gradient(135deg, #6D28D9, #06B6D4);
      font-weight: 700;
      cursor: pointer;
    }
    
    footer {
      background: #0F0A1A;
      color: #cbd5e1;
    }
    
    @media (max-width: 1024px) {
      .core-grid { grid-template-columns: 1fr 1fr; }
    }
    
    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .mobile-bottom-nav {
        display: flex; justify-content: space-around; position: fixed; bottom: 0; width: 100%; background: rgba(15,10,26,0.92); backdrop-filter: blur(10px); padding: 12px 0; z-index: 999;
      }
      .core-grid, .faq-grid { grid-template-columns: 1fr; }
      h1 { font-size: 2.2rem; }
    }