/* roulang page: index */
:root {
      --primary: #00E5A0;
      --primary-dark: #00C48A;
      --secondary-bg: #0A1128;
      --section-alt-bg: #0F1A3A;
      --deep-footer: #060D1F;
      --accent-purple: #7B2FFF;
      --text-bright: #F0F5FF;
      --text-muted: rgba(240, 245, 255, 0.75);
      --text-faded: rgba(240, 245, 255, 0.55);
      --glass-bg: rgba(10, 17, 40, 0.6);
      --glass-border: rgba(0, 229, 160, 0.15);
      --glass-border-hover: rgba(0, 229, 160, 0.45);
      --card-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
      --card-hover-shadow: 0 12px 36px rgba(0, 229, 160, 0.25);
      --glow-sm: 0 0 12px rgba(0, 229, 160, 0.4);
      --glow-md: 0 0 24px rgba(0, 229, 160, 0.55);
      --radius-card: 20px;
      --radius-btn: 14px;
      --radius-input: 10px;
      --font-sans: "Inter", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
      --font-mono: "JetBrains Mono", "SF Mono", "Fira Code", monospace;
    }

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

    body {
      background-color: var(--secondary-bg);
      font-family: var(--font-sans);
      color: var(--text-bright);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
      background-image: 
        linear-gradient(rgba(0, 229, 160, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 229, 160, 0.025) 1px, transparent 1px);
      background-size: 36px 36px;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 28px;
      width: 100%;
    }

    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      padding: 12px 0;
      transition: all 0.35s ease;
      background: transparent;
    }

    .site-header.scrolled {
      background: rgba(10, 17, 40, 0.88);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(0, 229, 160, 0.15);
      box-shadow: 0 4px 20px rgba(0,0,0,0.4);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      text-decoration: none;
    }

    .logo-icon {
      width: 32px;
      height: 32px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .logo-text {
      font-size: 1.6rem;
      font-weight: 700;
      color: #F0F5FF;
      letter-spacing: -0.3px;
    }

    .logo-highlight {
      color: var(--primary);
      margin-right: 2px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 2.5rem;
    }

    .nav-links a {
      color: rgba(240, 245, 255, 0.82);
      text-decoration: none;
      font-weight: 500;
      font-size: 1rem;
      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(--primary);
      box-shadow: var(--glow-sm);
      transition: width 0.25s;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
    }

    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }

    .cta-nav {
      background: linear-gradient(135deg, #00E5A0 0%, #00C48A 100%);
      color: #0A1128;
      font-weight: 700;
      padding: 10px 22px;
      border-radius: 30px;
      text-decoration: none;
      box-shadow: 0 4px 14px rgba(0, 229, 160, 0.35);
      transition: all 0.25s;
      margin-left: 16px;
       font-size: 0.95rem;
    }

    .cta-nav:hover {
      box-shadow: 0 0 22px rgba(0, 229, 160, 0.7);
      transform: translateY(-1px);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 6px;
      cursor: pointer;
      background: transparent;
      border: none;
      padding: 8px;
    }
    .hamburger span {
      width: 26px;
      height: 2px;
      background: #F0F5FF;
      border-radius: 4px;
      transition: 0.2s;
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      padding-top: 90px;
      position: relative;
      background: radial-gradient(circle at 80% 20%, rgba(123, 47, 255, 0.12) 0%, transparent 55%),
                  radial-gradient(circle at 30% 70%, rgba(0, 229, 160, 0.12) 0%, transparent 60%);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
    }

    .hero-title {
      font-size: 3.8rem;
      font-weight: 800;
      line-height: 1.2;
      letter-spacing: -0.02em;
      background: linear-gradient(135deg, #00E5A0 20%, #F0F5FF 85%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 20px;
    }

    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-muted);
      margin-bottom: 32px;
      max-width: 500px;
    }

    .btn-group {
      display: flex;
      flex-wrap: wrap;
      gap: 18px;
    }

    .btn-primary {
      background: linear-gradient(135deg, #00E5A0, #00C48A);
      border: none;
      color: #071021;
      font-weight: 700;
      padding: 14px 34px;
      border-radius: var(--radius-btn);
      font-size: 1.05rem;
      cursor: pointer;
      text-decoration: none;
      box-shadow: 0 4px 20px rgba(0, 229, 160, 0.4);
      transition: all 0.25s;
      display: inline-block;
      text-align: center;
    }

    .btn-primary:hover {
      transform: scale(1.03);
      box-shadow: 0 0 28px rgba(0, 229, 160, 0.8);
    }

    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--primary);
      color: #F0F5FF;
      font-weight: 600;
      padding: 14px 34px;
      border-radius: var(--radius-btn);
      cursor: pointer;
      text-decoration: none;
      transition: 0.2s;
      display: inline-block;
      text-align: center;
    }

    .btn-outline:hover {
      background: rgba(0, 229, 160, 0.12);
    }

    .glass-dashboard {
      background: var(--glass-bg);
      backdrop-filter: blur(24px);
      border: 1px solid var(--glass-border);
      border-radius: 28px;
      padding: 32px 28px;
      box-shadow: var(--card-shadow);
    }

    .metric-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 24px;
    }
    .metric-icon {
      font-size: 1.8rem;
    }
    .metric-value {
      font-family: var(--font-mono);
      font-size: 2.7rem;
      font-weight: 800;
      color: var(--primary);
      text-shadow: 0 0 14px rgba(0,229,160,0.5);
    }
    .trend-up {
      color: #00E5A0;
      font-weight: 700;
    }

    section {
      padding: 90px 0;
    }

    .section-title {
      font-size: 2.5rem;
      font-weight: 700;
      color: #F0F5FF;
      margin-bottom: 16px;
    }

    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(18px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-card);
      box-shadow: var(--card-shadow);
      transition: all 0.3s ease;
    }

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

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 26px;
    }

    .comparison-container {
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      gap: 30px;
      align-items: center;
    }
    .vs-badge {
      background: var(--primary);
      color: #0A1128;
      font-weight: 800;
      border-radius: 60px;
      padding: 14px 20px;
      box-shadow: 0 0 28px rgba(0,229,160,0.7);
    }

    .faq-item {
      border-bottom: 1px solid rgba(0,229,160,0.1);
      padding: 18px 0;
    }
    .contact-card {
      max-width: 680px;
      margin: 0 auto;
      background: rgba(10,17,40,0.75);
      backdrop-filter: blur(24px);
      border-radius: 28px;
      padding: 40px;
    }

    footer {
      background: #060D1F;
      padding: 60px 0 20px;
    }

    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; }
      .service-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .grid-3, .service-grid { grid-template-columns: 1fr; }
      .comparison-container { grid-template-columns: 1fr; }
    }