/* roulang page: index */
:root {
      --primary-purple: #7B2FFF;
      --primary-cyan: #00E5FF;
      --accent-orange: #FF6B35;
      --deep-black: #0A0A0F;
      --graphite: #1A1A24;
      --card-bg: rgba(20, 20, 30, 0.8);
      --border-light: rgba(123, 47, 255, 0.3);
      --text-primary: #F0F0FF;
      --text-body: #B0B0C0;
      --text-muted: #8888A0;
      --font-mono: 'SF Mono', 'Consolas', 'Monaco', monospace;
      --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --shadow-glow: 0 8px 32px rgba(123, 47, 255, 0.2);
      --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.5);
      --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1.2);
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--deep-black);
      color: var(--text-body);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航区 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 999;
      background: transparent;
      backdrop-filter: blur(0px);
      transition: var(--transition-smooth);
      padding: 0;
      height: 72px;
      display: flex;
      align-items: center;
    }
    .navbar.scrolled {
      background: rgba(10, 10, 15, 0.85);
      backdrop-filter: blur(16px);
      box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.7);
      border-bottom: 1px solid rgba(123, 47, 255, 0.2);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 24px;
      font-weight: 700;
      color: white;
      text-decoration: none;
      background: linear-gradient(135deg, var(--primary-cyan), var(--primary-purple));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .logo i {
      font-size: 26px;
      background: none;
      -webkit-text-fill-color: var(--primary-cyan);
      text-shadow: 0 0 12px var(--primary-purple);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .nav-links a {
      font-size: 15px;
      font-weight: 500;
      color: #CCCCDD;
      text-decoration: none;
      position: relative;
      transition: color 0.2s ease;
    }
    .nav-links a:hover {
      color: white;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 0;
      height: 2px;
      background: linear-gradient(to right, var(--primary-purple), var(--primary-cyan));
      transition: width 0.3s ease;
      box-shadow: 0 0 8px var(--primary-purple);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .btn-cta-nav {
      background: linear-gradient(135deg, var(--primary-purple), var(--primary-cyan));
      border: none;
      color: white;
      font-weight: 600;
      font-size: 14px;
      padding: 10px 24px;
      border-radius: 30px;
      cursor: pointer;
      box-shadow: 0 4px 15px rgba(123, 47, 255, 0.4);
      transition: var(--transition-smooth);
      text-decoration: none;
      display: inline-block;
    }
    .btn-cta-nav:hover {
      box-shadow: 0 0 20px var(--primary-cyan);
      transform: scale(1.03);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: transparent;
      border: none;
      z-index: 1001;
    }
    .hamburger .bar {
      width: 24px;
      height: 2px;
      background: white;
      transition: 0.3s;
      border-radius: 2px;
    }
    .mobile-menu {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: rgba(8, 8, 14, 0.95);
      backdrop-filter: blur(20px);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 40px;
      transform: translateY(-100%);
      transition: transform 0.4s ease;
      z-index: 1000;
    }
    .mobile-menu.active {
      transform: translateY(0);
    }
    .mobile-menu a {
      color: white;
      font-size: 24px;
      text-decoration: none;
      font-weight: 600;
    }
    /* 粒子背景 */
    #particle-canvas {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      z-index: 0;
      pointer-events: none;
    }
    .hero-section {
      position: relative;
      height: 100vh;
      min-height: 700px;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      background: radial-gradient(circle at 30% 50%, #1a1030, #0A0A0F 70%);
      overflow: hidden;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 900px;
    }
    .hero-title {
      font-size: 56px;
      font-weight: 700;
      letter-spacing: -1px;
      background: linear-gradient(to right, var(--primary-purple), var(--primary-cyan));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 20px;
      line-height: 1.2;
    }
    .hero-sub {
      font-size: 20px;
      color: #A0A0B8;
      margin-bottom: 40px;
      font-weight: 400;
    }
    .btn-group {
      display: flex;
      gap: 20px;
      justify-content: center;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary-purple), var(--primary-cyan));
      border: none;
      padding: 14px 36px;
      border-radius: 30px;
      color: white;
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      box-shadow: 0 0 20px rgba(123, 47, 255, 0.5);
      transition: var(--transition-smooth);
      text-decoration: none;
      display: inline-block;
    }
    .btn-primary:hover {
      box-shadow: 0 0 30px var(--primary-cyan);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--primary-cyan);
      padding: 14px 36px;
      border-radius: 30px;
      color: var(--primary-cyan);
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      transition: var(--transition-smooth);
      text-decoration: none;
    }
    .btn-outline:hover {
      background: rgba(0, 229, 255, 0.1);
      box-shadow: 0 0 20px rgba(0, 229, 255, 0.4);
    }
    .scroll-indicator {
      position: absolute;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      color: var(--primary-cyan);
      font-size: 28px;
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0% { opacity: 0.6; transform: translateX(-50%) translateY(0); }
      50% { opacity: 1; transform: translateX(-50%) translateY(8px); }
      100% { opacity: 0.6; transform: translateX(-50%) translateY(0); }
    }
    .section {
      padding: 100px 0;
    }
    .section-title {
      font-size: 40px;
      font-weight: 600;
      color: white;
      text-align: center;
      margin-bottom: 48px;
    }
    .data-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }
    .data-item .number {
      font-family: var(--font-mono);
      font-size: 48px;
      font-weight: 700;
      color: var(--primary-cyan);
      text-shadow: 0 0 15px var(--primary-purple);
    }
    .data-item .label {
      font-size: 14px;
      color: var(--text-muted);
      margin-top: 8px;
    }
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .service-card {
      background: var(--card-bg);
      backdrop-filter: blur(12px);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 32px;
      transition: var(--transition-smooth);
      box-shadow: var(--shadow-card);
    }
    .service-card:hover {
      transform: translateY(-8px);
      border-color: var(--primary-cyan);
      box-shadow: 0 12px 30px rgba(123, 47, 255, 0.3);
    }
    .service-icon {
      font-size: 40px;
      color: var(--primary-purple);
      margin-bottom: 20px;
    }
    .service-title {
      font-size: 22px;
      font-weight: 600;
      color: #E0E0F0;
      margin-bottom: 12px;
    }
    .comparison-container {
      display: flex;
      align-items: center;
      gap: 40px;
    }
    .compare-box {
      flex: 1;
      background: rgba(20,20,30,0.7);
      padding: 40px;
      border-radius: var(--radius-lg);
    }
    .vs-text {
      font-size: 48px;
      font-weight: 700;
      background: linear-gradient(to bottom, var(--primary-purple), var(--primary-cyan));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .faq-item {
      border-bottom: 1px solid rgba(255,255,255,0.1);
      padding: 24px 0;
    }
    .faq-question {
      font-weight: 600;
      font-size: 18px;
      color: white;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
    }
    .contact-form input, .contact-form select {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.1);
      padding: 14px;
      border-radius: 8px;
      width: 100%;
      color: white;
    }
    .contact-form input:focus {
      border-color: var(--primary-cyan);
      outline: none;
      box-shadow: 0 0 15px rgba(0,229,255,0.3);
    }
    footer {
      background: #0A0A0F;
      text-align: center;
      padding: 32px;
      color: #666680;
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .hero-title { font-size: 36px; }
      .data-grid { grid-template-columns: repeat(2,1fr); }
      .services-grid { grid-template-columns: 1fr; }
      .comparison-container { flex-direction: column; }
    }