/* roulang page: index */
:root {
      --electric-purple: #7B2FBE;
      --neon-cyan: #00F0FF;
      --deep-obsidian: #0A0E17;
      --cool-white: #F4F6FA;
      --text-light: #E8ECF1;
      --text-dark: #1E1E2A;
      --glass-bg: rgba(10,14,23,0.7);
      --glass-border: rgba(0,240,255,0.15);
      --card-shadow: 0 8px 32px rgba(123,47,190,0.12);
      --card-hover-shadow: 0 16px 48px rgba(0,240,255,0.18);
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --font-main: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --transition: 0.25s ease-in-out;
      --section-gap: 120px;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-main);
      background-color: var(--deep-obsidian);
      color: var(--text-light);
      line-height: 1.6;
      overflow-x: hidden;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    a {
      color: var(--neon-cyan);
      text-decoration: none;
      transition: color var(--transition);
    }

    a:hover {
      color: var(--electric-purple);
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    button, input {
      font-family: inherit;
      outline: none;
      border: none;
    }

    h1, h2, h3 {
      font-weight: 600;
      letter-spacing: -0.2px;
    }

    h1 {
      font-size: 48px;
      line-height: 56px;
      font-weight: 700;
      letter-spacing: -0.5px;
    }

    h2 {
      font-size: 36px;
      line-height: 44px;
      font-weight: 600;
    }

    h3 {
      font-size: 24px;
      line-height: 32px;
      font-weight: 600;
    }

    .text-body {
      font-size: 16px;
      line-height: 28px;
      font-weight: 400;
    }

    .text-small {
      font-size: 14px;
      line-height: 20px;
      font-weight: 400;
      opacity: 0.7;
    }

    /* 导航栏 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(10,14,23,0.8);
      backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(0,240,255,0.2);
      z-index: 1000;
      padding: 12px 0;
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .logo {
      font-size: 28px;
      font-weight: 700;
      color: var(--neon-cyan);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .logo-icon {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--electric-purple), var(--neon-cyan));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      color: white;
    }

    .nav-menu {
      display: flex;
      gap: 32px;
      align-items: center;
      list-style: none;
    }

    .nav-menu a {
      color: var(--text-light);
      font-weight: 500;
      font-size: 16px;
      position: relative;
      padding: 6px 0;
    }

    .nav-menu a:hover,
    .nav-menu a.active {
      color: var(--neon-cyan);
    }

    .nav-menu a.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--neon-cyan);
      box-shadow: 0 0 8px var(--neon-cyan);
    }

    .mobile-toggle {
      display: none;
      background: none;
      color: var(--neon-cyan);
      font-size: 28px;
      cursor: pointer;
    }

    /* 首屏 Hero */
    .hero {
      height: 100vh;
      display: flex;
      align-items: center;
      position: relative;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-repeat: no-repeat;
      overflow: hidden;
    }

    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 40%, rgba(123,47,190,0.5), transparent 70%),
                  linear-gradient(180deg, rgba(10,14,23,0.3) 0%, rgba(10,14,23,0.8) 90%);
      z-index: 1;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 700px;
      margin: 0 auto;
      text-align: center;
      animation: fadeInUp 0.8s ease-out;
    }

    @keyframes fadeInUp {
      from { opacity: 0; transform: translateY(30px); }
      to { opacity: 1; transform: translateY(0); }
    }

    .hero h1 {
      color: white;
      margin-bottom: 20px;
      text-shadow: 0 4px 20px rgba(0,0,0,0.5);
    }

    .hero .subtitle {
      font-size: 18px;
      color: rgba(232,236,241,0.9);
      margin-bottom: 40px;
    }

    .btn-group {
      display: flex;
      gap: 20px;
      justify-content: center;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--neon-cyan), var(--electric-purple));
      color: white;
      padding: 16px 40px;
      border-radius: var(--radius-md);
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      transition: all var(--transition);
      box-shadow: 0 4px 15px rgba(0,240,255,0.3);
      border: none;
      text-decoration: none;
      display: inline-block;
    }

    .btn-primary:hover {
      box-shadow: 0 0 30px rgba(0,240,255,0.7);
      transform: scale(1.04);
      color: white;
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--neon-cyan);
      color: var(--neon-cyan);
      padding: 16px 40px;
      border-radius: var(--radius-md);
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      transition: all var(--transition);
      text-decoration: none;
      display: inline-block;
    }

    .btn-outline:hover {
      background: rgba(0,240,255,0.1);
      color: var(--neon-cyan);
    }

    .scroll-indicator {
      position: absolute;
      bottom: 30px;
      right: 40px;
      z-index: 2;
      color: var(--neon-cyan);
      font-size: 32px;
      animation: bounce 2s infinite;
      cursor: pointer;
    }

    @keyframes bounce {
      0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
      40% { transform: translateY(-12px); }
      60% { transform: translateY(-5px); }
    }

    /* 通用板块 */
    .section {
      padding: var(--section-gap) 0;
    }

    .section-dark {
      background-color: var(--deep-obsidian);
    }

    .section-light {
      background-color: var(--cool-white);
      color: var(--text-dark);
    }

    .section-title {
      text-align: center;
      margin-bottom: 60px;
    }

    /* 数据看板 */
    .dashboard-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .stat-card {
      background: var(--glass-bg);
      backdrop-filter: blur(12px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      text-align: center;
      transition: all var(--transition);
    }

    .stat-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--card-hover-shadow);
      border-color: var(--neon-cyan);
    }

    .stat-number {
      font-size: 56px;
      font-weight: 800;
      line-height: 64px;
      background: linear-gradient(to right, var(--neon-cyan), #7B2FBE);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 10px;
    }

    .stat-label {
      font-size: 16px;
      color: var(--text-light);
      opacity: 0.8;
    }

    /* 服务卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: var(--cool-white);
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      box-shadow: var(--card-shadow);
      transition: all var(--transition);
      border: 1px solid transparent;
      text-align: left;
      color: var(--text-dark);
    }

    .service-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--card-hover-shadow);
      border-color: var(--neon-cyan);
    }

    .service-icon {
      width: 64px;
      height: 64px;
      border-radius: 50%;
      background: rgba(0,240,255,0.1);
      border: 2px solid var(--neon-cyan);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 32px;
      color: var(--electric-purple);
      margin-bottom: 20px;
    }

    .service-card h3 {
      margin-bottom: 12px;
      color: var(--text-dark);
    }

    .service-link {
      color: var(--electric-purple);
      font-weight: 600;
      margin-top: 16px;
      display: inline-block;
    }

    /* 对比区块 */
    .compare-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }

    .compare-card {
      background: var(--cool-white);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: 0 10px 25px rgba(0,0,0,0.05);
      color: var(--text-dark);
    }

    .compare-card.highlight {
      border: 2px solid var(--neon-cyan);
      background: #f0faff;
      box-shadow: 0 12px 30px rgba(0,240,255,0.1);
    }

    .compare-image {
      width: 100%;
      height: 200px;
      object-fit: cover;
      border-radius: 12px;
      margin-bottom: 20px;
    }

    .compare-list {
      list-style: none;
      padding: 0;
    }

    .compare-list li {
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .icon-check {
      color: #00b894;
    }
    .icon-cross {
      color: #d63031;
    }

    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background: var(--cool-white);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: 0 3px 12px rgba(0,0,0,0.05);
      color: var(--text-dark);
    }

    .faq-question {
      padding: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 600;
      font-size: 18px;
      background: none;
      border: none;
      width: 100%;
      text-align: left;
      color: var(--text-dark);
      transition: background var(--transition);
    }

    .faq-question:hover {
      background: rgba(0,240,255,0.05);
    }

    .faq-icon {
      font-size: 24px;
      color: var(--neon-cyan);
      transition: transform 0.3s;
    }

    .faq-answer {
      padding: 0 24px 24px;
      display: none;
      color: #333;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    /* CTA */
    .cta-section {
      background: linear-gradient(135deg, #7B2FBE, #0A0E17);
      background-image: url('/assets/images/backpic/back-2.webp');
      background-size: cover;
      background-blend-mode: overlay;
      padding: 100px 0;
      text-align: center;
    }

    .cta-form {
      display: flex;
      gap: 16px;
      max-width: 500px;
      margin: 30px auto 0;
      flex-wrap: wrap;
      justify-content: center;
    }

    .cta-input {
      flex: 1;
      padding: 16px 20px;
      background: rgba(10,14,23,0.8);
      border: 2px solid var(--neon-cyan);
      border-radius: var(--radius-md);
      color: white;
      font-size: 16px;
      min-width: 200px;
    }

    .cta-input:focus {
      box-shadow: 0 0 15px rgba(0,240,255,0.5);
    }

    .privacy-note {
      margin-top: 16px;
      opacity: 0.7;
      font-size: 13px;
    }

    /* Footer */
    .footer {
      background: #080c14;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }

    .footer-brand p {
      margin: 12px 0;
      opacity: 0.8;
    }

    .footer-links h4, .footer-contact h4 {
      color: var(--neon-cyan);
      margin-bottom: 16px;
    }

    .footer-links ul {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }

    .social-icons {
      display: flex;
      gap: 12px;
      margin-top: 16px;
    }

    .social-circle {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      border: 2px solid var(--neon-cyan);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--neon-cyan);
      transition: all var(--transition);
    }

    .social-circle:hover {
      background: var(--neon-cyan);
      color: #000;
    }

    .copyright {
      margin-top: 40px;
      text-align: center;
      opacity: 0.6;
      font-size: 14px;
      border-top: 1px solid rgba(255,255,255,0.1);
      padding-top: 20px;
    }

    /* 响应式 */
    @media (max-width: 1024px) {
      h1 { font-size: 36px; line-height: 44px; }
      h2 { font-size: 28px; }
      .section { padding: 80px 0; }
      .dashboard-grid { grid-template-columns: repeat(2, 1fr); }
      .services-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .mobile-toggle { display: block; }
      .dashboard-grid { grid-template-columns: 1fr; }
      .services-grid { grid-template-columns: 1fr; }
      .compare-wrapper { grid-template-columns: 1fr; }
      h1 { font-size: 28px; line-height: 36px; }
      .btn-group { flex-direction: column; align-items: center; }
    }

    .mobile-menu-active {
      display: flex !important;
      flex-direction: column;
      position: absolute;
      top: 70px;
      left: 0;
      width: 100%;
      background: rgba(10,14,23,0.95);
      backdrop-filter: blur(20px);
      padding: 30px;
      gap: 24px;
    }