/* roulang page: index */
:root {
      --primary: #FF4500;
      --primary-light: #FF8C00;
      --secondary: #1A1A2E;
      --accent: #FFD700;
      --surface-glass: rgba(26, 26, 46, 0.6);
      --surface-glass-light: rgba(255, 255, 255, 0.05);
      --border-light: rgba(255, 255, 255, 0.1);
      --text-primary: #FFFFFF;
      --text-secondary: rgba(255, 255, 255, 0.7);
      --text-muted: rgba(255, 255, 255, 0.5);
      --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-mono: "Inter", "DIN Alternate", sans-serif;
      --radius-lg: 24px;
      --radius-card: 16px;
      --radius-btn: 50px;
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
      --shadow-glow: 0 12px 40px rgba(255, 69, 0, 0.3);
      --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1.2);
    }
    
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: #0A0A14;
      color: var(--text-primary);
      line-height: 1.6;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }
    
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* 按钮重置 */
    button, .btn {
      border: none;
      cursor: pointer;
      font-family: inherit;
      transition: var(--transition);
      outline: none;
    }
    
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(10, 10, 20, 0.8);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      padding: 12px 0;
    }
    
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--text-primary);
      letter-spacing: 2px;
    }
    
    .logo i {
      color: var(--primary);
      font-size: 2rem;
    }
    
    .logo span {
      background: linear-gradient(135deg, var(--primary), var(--accent));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    
    .nav-link {
      font-weight: 500;
      color: var(--text-secondary);
      position: relative;
      padding: 6px 0;
    }
    
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width 0.3s ease;
    }
    
    .nav-link:hover {
      color: var(--text-primary);
    }
    
    .nav-link:hover::after {
      width: 100%;
    }
    
    .nav-cta {
      background: linear-gradient(135deg, var(--primary), var(--primary-light));
      color: white;
      padding: 10px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      box-shadow: 0 4px 15px rgba(255, 69, 0, 0.4);
    }
    
    .nav-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(255, 69, 0, 0.6);
    }
    
    .hamburger {
      display: none;
      font-size: 1.8rem;
      color: var(--text-primary);
      cursor: pointer;
    }
    
    /* 移动端底部导航 */
    .mobile-bottom-nav {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(10, 10, 20, 0.95);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-top: 1px solid rgba(255, 255, 255, 0.15);
      padding: 10px 16px;
      z-index: 999;
      justify-content: space-around;
      align-items: center;
    }
    
    .mobile-nav-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      color: var(--text-muted);
      font-size: 0.75rem;
    }
    
    .mobile-nav-item i {
      font-size: 1.2rem;
      margin-bottom: 2px;
    }
    
    .mobile-nav-item.active {
      color: var(--primary);
    }
    
    .mobile-cta-middle {
      background: linear-gradient(135deg, var(--primary), var(--primary-light));
      color: white;
      padding: 12px 28px;
      border-radius: 40px;
      font-weight: 700;
      box-shadow: 0 0 20px rgba(255, 69, 0, 0.5);
    }
    
    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      padding-top: 80px;
    }
    
    .hero::before {
      content: '';
      position: absolute;
      top: 0; left: 0; width: 100%; height: 100%;
      background: radial-gradient(circle at 30% 40%, rgba(255, 69, 0, 0.15), transparent 70%);
    }
    
    .hero-content {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 48px;
      position: relative;
      z-index: 2;
      width: 100%;
    }
    
    .hero-text {
      flex: 1;
    }
    
    .hero h1 {
      font-size: 4rem;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 24px;
      background: linear-gradient(to right, #fff, #ddd);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    
    .hero-subtitle {
      font-size: 1.25rem;
      color: var(--text-secondary);
      margin-bottom: 40px;
      max-width: 500px;
    }
    
    .hero-buttons {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }
    
    .btn-primary {
      background: linear-gradient(135deg, var(--primary), var(--primary-light));
      color: white;
      padding: 16px 40px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      font-size: 1.1rem;
      box-shadow: 0 6px 20px rgba(255, 69, 0, 0.5);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    
    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 30px rgba(255, 69, 0, 0.7);
    }
    
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      padding: 16px 40px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      font-size: 1.1rem;
    }
    
    .btn-outline:hover {
      background: var(--primary);
      color: white;
    }
    
    .hero-visual {
      flex: 1;
      display: flex;
      justify-content: center;
      align-items: center;
    }
    
    .glass-card-preview {
      background: var(--surface-glass);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-card);
      width: 320px;
      transform: perspective(800px) rotateY(-5deg);
      transition: transform 0.4s;
    }
    
    .glass-card-preview:hover {
      transform: perspective(800px) rotateY(0deg);
    }
    
    .glass-card-preview img {
      border-radius: 12px;
      margin-bottom: 16px;
    }
    
    /* 通用板块 */
    section {
      padding: 100px 0;
    }
    
    .section-title {
      font-size: 2.8rem;
      font-weight: 700;
      text-align: center;
      margin-bottom: 16px;
      color: var(--text-primary);
    }
    
    .section-subtitle {
      text-align: center;
      color: var(--text-secondary);
      font-size: 1.2rem;
      margin-bottom: 60px;
    }
    
    /* 痛点区 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    
    .pain-card {
      background: rgba(26, 26, 46, 0.5);
      backdrop-filter: blur(10px);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      padding: 32px;
      position: relative;
      overflow: hidden;
      transition: var(--transition);
    }
    
    .pain-card::before {
      content: '';
      position: absolute;
      left: 0;
      top: 20%;
      height: 60%;
      width: 4px;
      background: var(--primary);
      border-radius: 0 2px 2px 0;
    }
    
    .pain-card:hover {
      box-shadow: var(--shadow-glow);
      transform: translateY(-5px);
    }
    
    .pain-card i {
      font-size: 2.2rem;
      color: var(--primary);
      margin-bottom: 16px;
    }
    
    /* 解决方案 Z 型布局 */
    .solution-z {
      display: flex;
      flex-direction: column;
      gap: 80px;
    }
    
    .z-row {
      display: flex;
      align-items: center;
      gap: 60px;
    }
    
    .z-row.reverse {
      flex-direction: row-reverse;
    }
    
    .z-text {
      flex: 1;
    }
    
    .z-image {
      flex: 1;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }
    
    /* 数据区 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    
    .stat-item {
      background: var(--surface-glass-light);
      backdrop-filter: blur(12px);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      padding: 32px 16px;
    }
    
    .stat-number {
      font-family: var(--font-mono);
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--accent);
      text-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
    }
    
    /* 证言 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr;
      gap: 24px;
    }
    
    .testimonial-card {
      background: rgba(255, 255, 255, 0.08);
      backdrop-filter: blur(16px);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      padding: 28px;
    }
    
    .testimonial-card.featured {
      grid-row: span 2;
    }
    
    .user-avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      box-shadow: 0 0 15px var(--primary);
    }
    
    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    
    .faq-item {
      background: rgba(26, 26, 46, 0.4);
      backdrop-filter: blur(12px);
      border: 1px solid var(--border-light);
      border-radius: 12px;
      margin-bottom: 16px;
    }
    
    .faq-question {
      width: 100%;
      background: transparent;
      color: var(--text-primary);
      padding: 20px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      font-size: 1.1rem;
    }
    
    .faq-answer {
      padding: 0 24px 20px;
      color: var(--text-secondary);
      display: none;
    }
    
    .faq-item.active .faq-answer {
      display: block;
    }
    
    /* CTA */
    .cta-section {
      background: linear-gradient(135deg, rgba(255,69,0,0.1), rgba(26,26,46,0.8));
      text-align: center;
      border-radius: var(--radius-lg);
      margin: 0 24px;
    }
    
    /* 页脚 */
    .footer {
      background: #0A0A14;
      padding: 48px 0 24px;
      border-top: 1px solid var(--border-light);
    }
    
    .footer-grid {
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 32px;
    }
    
    @media (max-width: 1024px) {
      .hero h1 { font-size: 2.8rem; }
      .pain-grid { grid-template-columns: 1fr 1fr; }
      .stats-grid { grid-template-columns: 1fr 1fr; }
      .z-row { flex-direction: column; }
      .z-row.reverse { flex-direction: column; }
    }
    
    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .hamburger { display: block; }
      .mobile-bottom-nav { display: flex; }
      .hero-content { flex-direction: column; text-align: center; }
      .hero h1 { font-size: 2.4rem; }
      .pain-grid { grid-template-columns: 1fr; }
      .testimonial-grid { grid-template-columns: 1fr; }
      .stats-grid { grid-template-columns: 1fr 1fr; }
    }