/* roulang page: index */
* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    :root {
      --deep-indigo: #0B0F19;
      --electric-purple: #A855F7;
      --electric-purple-dark: #7C3AED;
      --neon-cyan: #22D3EE;
      --gray-white: #F8FAFC;
      --slate-gray: #94A3B8;
      --dark-blue-gray: #1E293B;
      --deep-footer: #060B14;
      --border-light: #E2E8F0;
      --card-glass: rgba(30, 41, 59, 0.6);
      --button-glow: 0 0 20px rgba(168, 85, 247, 0.6);
      --hover-glow: 0 0 30px rgba(168, 85, 247, 0.9);
      --neon-glow-text: 0 0 15px #22D3EE;
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-btn: 50px;
      --font-title: 'PingFang SC', 'Microsoft YaHei', 'Inter', sans-serif;
      --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --font-data: 'DIN Alternate', 'Inter', sans-serif;
    }
    body {
      background-color: var(--deep-indigo);
      color: var(--gray-white);
      font-family: var(--font-body);
      line-height: 1.8;
      font-size: 18px;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }
    @media (max-width: 768px) {
      .container {
        padding: 0 20px;
      }
    }
    /* 导航 */
    header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: #FFFFFF;
      border-bottom: 1px solid var(--border-light);
      box-shadow: 0 2px 8px rgba(0,0,0,0.04);
      backdrop-filter: blur(8px);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
      color: var(--deep-indigo);
    }
    .logo-icon {
      font-size: 30px;
      color: var(--electric-purple);
    }
    .logo-text {
      font-weight: 700;
      font-size: 20px;
      letter-spacing: 0.5px;
      font-family: var(--font-title);
      color: var(--deep-indigo);
    }
    .nav-links {
      display: flex;
      gap: 32px;
      list-style: none;
    }
    .nav-links a {
      text-decoration: none;
      color: var(--slate-gray);
      font-weight: 500;
      font-size: 16px;
      position: relative;
      padding: 8px 0;
      transition: color 0.2s;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--electric-purple);
      transition: width 0.25s ease;
    }
    .nav-links a:hover {
      color: var(--electric-purple);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .search-box {
      display: flex;
      align-items: center;
      background: #f1f5f9;
      border-radius: 20px;
      padding: 6px 16px;
      color: var(--slate-gray);
      font-size: 14px;
    }
    .search-box i {
      margin-right: 6px;
      font-size: 14px;
    }
    .search-box input {
      border: none;
      background: transparent;
      outline: none;
      font-size: 14px;
      width: 120px;
      color: var(--deep-indigo);
    }
    .search-box input::placeholder {
      color: #94a3b8;
    }
    .btn-nav {
      background: linear-gradient(135deg, var(--electric-purple), var(--electric-purple-dark));
      color: white;
      border: none;
      border-radius: var(--radius-btn);
      padding: 8px 24px;
      font-weight: 600;
      font-size: 14px;
      cursor: pointer;
      box-shadow: var(--button-glow);
      transition: all 0.3s;
      white-space: nowrap;
    }
    .btn-nav:hover {
      box-shadow: var(--hover-glow);
      outline: 1px solid var(--neon-cyan);
    }
    .hamburger {
      display: none;
      font-size: 24px;
      color: var(--deep-indigo);
      cursor: pointer;
    }
    @media (max-width: 1024px) {
      .nav-links, .nav-actions .search-box {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .nav-actions .btn-nav {
        display: none;
      }
    }
    /* 移动端菜单 */
    .mobile-menu {
      position: fixed;
      top: 0;
      right: -100%;
      width: 75%;
      max-width: 320px;
      height: 100vh;
      background: rgba(10, 15, 25, 0.9);
      backdrop-filter: blur(20px);
      padding: 24px;
      display: flex;
      flex-direction: column;
      gap: 24px;
      transition: right 0.3s ease;
      z-index: 100;
      border-left: 1px solid rgba(168,85,247,0.3);
    }
    .mobile-menu.open {
      right: 0;
    }
    .mobile-menu a {
      color: white;
      font-size: 20px;
      text-decoration: none;
      font-weight: 500;
    }
    .mobile-close {
      align-self: flex-end;
      font-size: 28px;
      color: white;
      cursor: pointer;
    }
    /* Hero */
    #hero {
      background-color: var(--deep-indigo);
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      padding: 120px 0 100px;
      display: flex;
      align-items: center;
      overflow: hidden;
    }
    #hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 40%, rgba(168,85,247,0.25) 0%, transparent 60%);
      pointer-events: none;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 700px;
    }
    .hero h1 {
      font-family: var(--font-title);
      font-weight: 700;
      font-size: 56px;
      line-height: 1.2;
      margin-bottom: 24px;
    }
    .hero h1 .highlight {
      color: var(--neon-cyan);
      text-shadow: var(--neon-glow-text);
    }
    .hero-sub {
      font-size: 20px;
      color: var(--slate-gray);
      margin-bottom: 40px;
      max-width: 600px;
    }
    .hero-buttons {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--electric-purple), var(--electric-purple-dark));
      color: white;
      border: none;
      border-radius: var(--radius-btn);
      padding: 14px 36px;
      font-weight: 700;
      font-size: 18px;
      cursor: pointer;
      box-shadow: var(--button-glow);
      transition: all 0.3s;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-primary:hover {
      box-shadow: var(--hover-glow);
      outline: 2px solid var(--neon-cyan);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--neon-cyan);
      color: var(--neon-cyan);
      border-radius: var(--radius-btn);
      padding: 14px 36px;
      font-weight: 600;
      font-size: 18px;
      cursor: pointer;
      transition: 0.3s;
    }
    .btn-outline:hover {
      background: rgba(34,211,238,0.15);
    }
    @media (max-width: 1024px) {
      .hero h1 {
        font-size: 40px;
      }
    }
    @media (max-width: 768px) {
      .hero h1 {
        font-size: 32px;
      }
      .hero-sub {
        font-size: 18px;
      }
      .hero-buttons .btn-primary, .hero-buttons .btn-outline {
        width: 100%;
        justify-content: center;
      }
    }
    /* 通用板块 */
    section {
      padding: 80px 0;
    }
    .section-title {
      font-family: var(--font-title);
      font-weight: 700;
      font-size: 40px;
      margin-bottom: 16px;
      text-align: center;
    }
    .section-desc {
      color: var(--slate-gray);
      text-align: center;
      max-width: 600px;
      margin: 0 auto 48px;
    }
    /* 痛点 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .pain-card {
      background: var(--card-glass);
      backdrop-filter: blur(16px);
      border-radius: var(--radius-lg);
      padding: 32px;
      border: 1px solid transparent;
      position: relative;
      box-shadow: 0 8px 32px rgba(168,85,247,0.15);
      transition: 0.3s;
      border-image: linear-gradient(135deg, var(--electric-purple), var(--neon-cyan)) 1;
    }
    .pain-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 40px rgba(34,211,238,0.25);
    }
    .pain-card h3 {
      font-size: 24px;
      margin-bottom: 12px;
    }
    .pain-desc {
      color: var(--slate-gray);
    }
    @media (max-width: 1024px) {
      .pain-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .pain-grid {
        grid-template-columns: 1fr;
      }
    }
    /* 解决方案交替 */
    .solution-row {
      display: flex;
      align-items: center;
      gap: 60px;
      margin-bottom: 80px;
    }
    .solution-row.reverse {
      flex-direction: row-reverse;
    }
    .solution-img {
      flex: 1;
      border-radius: var(--radius-lg);
      overflow: hidden;
      background: rgba(30,41,59,0.5);
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .solution-img img {
      width: 100%;
      height: auto;
      display: block;
      border-radius: var(--radius-lg);
    }
    .solution-text {
      flex: 1;
    }
    .solution-text h3 {
      font-size: 32px;
      margin-bottom: 16px;
    }
    @media (max-width: 768px) {
      .solution-row, .solution-row.reverse {
        flex-direction: column;
      }
    }
    /* 成果数据 */
    .stats-grid {
      display: flex;
      justify-content: center;
      gap: 48px;
      flex-wrap: wrap;
    }
    .stat-item {
      text-align: center;
    }
    .stat-number {
      font-family: var(--font-data);
      font-weight: 800;
      font-size: 48px;
      color: var(--neon-cyan);
      text-shadow: var(--neon-glow-text);
    }
    /* 证言横向滚动 */
    .testimonial-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 16px;
      scrollbar-width: thin;
    }
    .testimonial-card {
      min-width: 300px;
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(10px);
      border-radius: var(--radius-lg);
      padding: 24px;
      display: flex;
      gap: 16px;
      align-items: center;
      border: 1px solid rgba(168,85,247,0.3);
    }
    /* FAQ */
    .faq-item {
      background: var(--dark-blue-gray);
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 24px;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
      font-weight: 600;
    }
    .faq-answer {
      padding: 0 24px 18px;
      color: var(--slate-gray);
      display: none;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    /* CTA */
    #cta {
      background: var(--deep-footer);
      text-align: center;
      padding: 80px 20px;
    }
    /* 页脚 */
    footer {
      background: var(--deep-footer);
      border-top: 2px solid var(--electric-purple);
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }
    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }
    .footer-links a {
      display: block;
      color: var(--slate-gray);
      text-decoration: none;
      margin-bottom: 8px;
    }