/* roulang page: index */
:root {
      --primary-deep: #0A0E27;
      --primary-dark: #141832;
      --accent-cyan: #00F0FF;
      --accent-pink: #FF3CAC;
      --accent-gold: #FFD700;
      --bg-light: #F5F7FA;
      --text-main: #1A1A2E;
      --text-secondary: #5A5A7A;
      --text-on-dark: #FFFFFF;
      --card-bg: #FFFFFF;
      --card-dark: #1C203A;
      --border-light: rgba(0,240,255,0.08);
      --border-cyan: rgba(0,240,255,0.25);
      --shadow-default: 0 4px 20px rgba(10,14,39,0.06);
      --shadow-hover: 0 12px 32px rgba(0,240,255,0.12);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-tag: 6px;
      --font-numbers: 'Orbitron', 'Rajdhani', sans-serif;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 20px;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    button, input {
      font-family: inherit;
    }
    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
      z-index: 1000;
      display: flex;
      align-items: center;
      transition: all 0.25s ease;
    }
    .navbar.scrolled {
      background: rgba(255,255,255,0.98);
      box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 20px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 6px;
      font-weight: 800;
      font-size: 1.7rem;
      letter-spacing: -0.3px;
      color: var(--primary-deep);
    }
    .logo .ky-badge {
      font-size: 0.9rem;
      background: var(--accent-cyan);
      color: var(--primary-deep);
      padding: 2px 8px;
      border-radius: 20px;
      font-weight: 700;
      margin-left: 6px;
      letter-spacing: 0.5px;
    }
    .logo i {
      color: var(--accent-cyan);
      font-size: 1.9rem;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 2rem;
      list-style: none;
    }
    .nav-menu a {
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--text-main);
      position: relative;
      padding: 6px 0;
      transition: color 0.2s;
    }
    .nav-menu a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent-cyan);
      transition: width 0.25s ease;
    }
    .nav-menu a:hover {
      color: var(--accent-cyan);
    }
    .nav-menu a:hover::after {
      width: 100%;
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: transparent;
      border: none;
    }
    .hamburger span {
      width: 25px;
      height: 2.5px;
      background: var(--primary-deep);
      border-radius: 4px;
      transition: 0.2s;
    }
    .mobile-panel {
      display: none;
    }
    @media (max-width: 1024px) {
      .nav-menu {
        display: none;
      }
      .hamburger {
        display: flex;
      }
      .mobile-panel {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        height: calc(100vh - 72px);
        background: var(--primary-deep);
        flex-direction: column;
        justify-content: center;
        align-items: flex-start;
        padding: 2rem;
        gap: 2rem;
        z-index: 999;
        display: none;
      }
      .mobile-panel.active {
        display: flex;
      }
      .mobile-panel a {
        color: white;
        font-size: 1.5rem;
        font-weight: 600;
        border-bottom: 1px solid rgba(255,255,255,0.15);
        width: 100%;
        padding-bottom: 0.8rem;
      }
      .navbar {
        height: 64px;
      }
    }
    /* Hero */
    .hero {
      background: linear-gradient(135deg, #0A0E27 0%, #141832 100%);
      color: white;
      padding: 140px 0 80px;
      position: relative;
      overflow: hidden;
    }
    .hero::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.25;
      z-index: 0;
    }
    .hero .container {
      position: relative;
      z-index: 2;
      display: flex;
      align-items: center;
      gap: 3rem;
    }
    .hero-left {
      flex: 1;
    }
    .hero-left h1 {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1.2;
      letter-spacing: -0.5px;
      margin-bottom: 1.2rem;
    }
    .hero-left .subtitle {
      font-size: 1.1rem;
      color: rgba(255,255,255,0.8);
      margin-bottom: 2rem;
    }
    .btn-group {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--accent-cyan);
      color: #0A0E27;
      font-weight: 700;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      border: none;
      cursor: pointer;
      transition: 0.25s;
      font-size: 1rem;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-primary:hover {
      background: #33F5FF;
      box-shadow: 0 0 24px rgba(0,240,255,0.5);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--accent-cyan);
      color: var(--accent-cyan);
      font-weight: 600;
      padding: 12px 32px;
      border-radius: var(--radius-btn);
      transition: 0.25s;
    }
    .btn-outline:hover {
      background: rgba(0,240,255,0.08);
    }
    .hero-right {
      flex: 1;
      background: rgba(28,32,58,0.7);
      backdrop-filter: blur(10px);
      border-radius: 20px;
      padding: 1.5rem;
      border: 1px solid rgba(0,240,255,0.25);
    }
    @media (max-width: 768px) {
      .hero .container {
        flex-direction: column;
        text-align: center;
      }
      .hero-left h1 {
        font-size: 2.2rem;
      }
    }
    /* 数据看板 */
    .stats {
      background: var(--primary-deep);
      padding: 60px 0;
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 2rem;
    }
    .stat-card {
      background: #1C203A;
      border-radius: var(--radius-card);
      padding: 2rem 1.5rem;
      text-align: center;
      border: 1px solid var(--border-light);
    }
    .stat-number {
      font-family: var(--font-numbers);
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--accent-cyan);
    }
    .stat-label {
      color: rgba(255,255,255,0.7);
      font-size: 0.9rem;
      margin-top: 0.5rem;
    }
    @media (max-width: 768px) {
      .stats-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    /* 服务矩阵 */
    .services {
      padding: 80px 0;
      background: #F5F7FA;
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      margin-bottom: 2.5rem;
    }
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .service-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 2rem;
      box-shadow: var(--shadow-default);
      border: 1px solid var(--border-light);
      transition: all 0.3s;
    }
    .service-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(0,240,255,0.3);
    }
    .service-icon {
      font-size: 2.4rem;
      color: var(--accent-cyan);
      margin-bottom: 1.2rem;
    }
    .service-card h3 {
      font-size: 1.4rem;
      margin-bottom: 0.8rem;
    }
    @media (max-width: 1024px) {
      .services-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 640px) {
      .services-grid {
        grid-template-columns: 1fr;
      }
    }
    /* 对比区 */
    .comparison {
      background: #141832;
      padding: 80px 0;
      color: white;
    }
    .compare-wrapper {
      display: flex;
      align-items: center;
      gap: 2rem;
    }
    .vs-badge {
      background: var(--accent-pink);
      width: 60px;
      height: 60px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.5rem;
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0% { box-shadow: 0 0 0 0 rgba(255,60,172,0.6); }
      70% { box-shadow: 0 0 0 18px rgba(255,60,172,0); }
      100% { box-shadow: 0 0 0 0 rgba(255,60,172,0); }
    }
    .compare-col {
      flex: 1;
      background: rgba(28,32,58,0.7);
      padding: 2rem;
      border-radius: 16px;
    }
    .compare-item {
      display: flex;
      align-items: center;
      gap: 0.8rem;
      margin: 1rem 0;
    }
    @media (max-width: 768px) {
      .compare-wrapper {
        flex-direction: column;
      }
    }
    /* FAQ */
    .faq {
      padding: 80px 0;
    }
    .faq-inner {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      border-bottom: 1px solid #e0e0e0;
      padding: 1.2rem 0;
      cursor: pointer;
    }
    .faq-question {
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    /* 表单 */
    .contact {
      background: #0A0E27;
      padding: 80px 0;
    }
    .contact-card {
      background: white;
      border-radius: 20px;
      padding: 2.5rem;
      max-width: 600px;
      margin: 0 auto;
    }
    .input-field {
      width: 100%;
      padding: 14px;
      border: 1px solid #D1D5DB;
      border-radius: 8px;
      margin: 0.8rem 0;
    }
    /* 页脚 */
    .footer {
      background: #0A0E27;
      color: rgba(255,255,255,0.8);
      padding: 4rem 0 2rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 2rem;
    }
    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }