/* roulang page: index */
:root {
      --bg-deep: #060918;
      --bg-primary: #0A0E27;
      --card-bg: #111633;
      --text-primary: #FFFFFF;
      --text-body: #B0B8D1;
      --text-muted: #6B7394;
      --accent-cyan: #00F0FF;
      --accent-magenta: #FF3CAC;
      --accent-amber: #FFB800;
      --border-glow: rgba(0, 240, 255, 0.15);
      --shadow-card: 0 4px 24px rgba(0, 240, 255, 0.08);
      --shadow-hover: 0 8px 40px rgba(0, 240, 255, 0.18);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-badge: 6px;
      --max-width: 1280px;
      --font-mono: 'JetBrains Mono', 'Roboto Mono', monospace;
      --font-sans: 'Noto Sans SC', 'PingFang SC', system-ui, -apple-system, sans-serif;
      --transition-smooth: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    html {
      scroll-behavior: smooth;
      background-color: var(--bg-deep);
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-deep);
      color: var(--text-body);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 2rem;
    }

    /* 背景电路纹理 */
    .circuit-bg {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 200" opacity="0.03"><path d="M20 20h20v20h-20zM60 20h40v10h-40zM120 20h30v15h-30zM160 40v20h20M20 60h10v40M60 80h50v10M140 70v30h20M80 120h40v10M20 140h20v20M100 140v40h10M160 120v20h-20" stroke="%2300F0FF" fill="none" stroke-width="1.2"/></svg>');
      pointer-events: none;
      z-index: 0;
    }

    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(6, 9, 24, 0.88);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(0, 240, 255, 0.12);
      z-index: 50;
      padding: 0.75rem 0;
    }

    .nav-container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 2rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      font-weight: 700;
      font-size: 1.5rem;
      background: linear-gradient(135deg, #00F0FF 0%, #7BFFD6 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: -0.3px;
      text-decoration: none;
    }

    .logo-icon {
      font-size: 1.8rem;
      filter: drop-shadow(0 0 6px #00F0FF);
      color: #00F0FF;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 2rem;
      list-style: none;
    }

    .nav-links a {
      color: var(--text-body);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      transition: var(--transition-smooth);
      position: relative;
      padding-bottom: 4px;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: #fff;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent-cyan);
      transition: width 0.2s ease;
    }

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

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 1rem;
    }

    .badge-pulse {
      display: flex;
      align-items: center;
      gap: 0.4rem;
      background: rgba(255, 60, 172, 0.15);
      padding: 0.3rem 0.8rem;
      border-radius: 20px;
      font-size: 0.75rem;
      font-weight: 600;
      color: #FF3CAC;
    }

    .pulse-dot {
      width: 8px;
      height: 8px;
      background: #FF3CAC;
      border-radius: 50%;
      animation: pulse-glow 1.8s infinite;
    }

    .countdown-tag {
      background: rgba(255, 184, 0, 0.15);
      color: var(--accent-amber);
      padding: 0.3rem 0.8rem;
      border-radius: 20px;
      font-size: 0.75rem;
      font-weight: 600;
      font-family: var(--font-mono);
      letter-spacing: 0.5px;
    }

    .nav-cta {
      background: var(--accent-cyan);
      color: #0A0E27;
      font-weight: 700;
      padding: 0.5rem 1.4rem;
      border-radius: var(--radius-btn);
      text-decoration: none;
      font-size: 0.9rem;
      transition: var(--transition-smooth);
      box-shadow: 0 0 12px rgba(0,240,255,0.4);
    }

    .nav-cta:hover {
      box-shadow: 0 0 24px rgba(0,240,255,0.7);
      transform: scale(1.03);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: transparent;
      border: none;
    }
    .hamburger span {
      width: 25px;
      height: 2px;
      background: #fff;
      transition: 0.3s;
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      position: relative;
      padding: 7rem 0 4rem;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
      background-color: rgba(6,9,24,0.75);
    }

    .hero-grid {
      display: flex;
      align-items: center;
      gap: 3rem;
      flex-wrap: wrap;
    }

    .hero-content {
      flex: 1 1 500px;
    }

    .hero h1 {
      font-size: clamp(2.5rem, 6vw, 3.8rem);
      font-weight: 700;
      line-height: 1.15;
      color: #fff;
      margin-bottom: 1.2rem;
      letter-spacing: -0.5px;
    }
    .highlight {
      color: var(--accent-cyan);
      text-shadow: 0 0 12px rgba(0,240,255,0.5);
    }
    .hero-sub {
      font-size: 1.2rem;
      color: var(--accent-amber);
      margin-bottom: 2rem;
      display: flex;
      flex-wrap: wrap;
      gap: 0.8rem;
    }
    .hero-buttons {
      display: flex;
      gap: 1.2rem;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: #00F0FF;
      color: #0A0E27;
      font-weight: 700;
      padding: 0.8rem 2rem;
      border-radius: var(--radius-btn);
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      transition: var(--transition-smooth);
      box-shadow: 0 0 18px rgba(0,240,255,0.5);
    }
    .btn-primary:hover {
      box-shadow: 0 0 28px rgba(0,240,255,0.8);
      transform: scale(1.04);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid #00F0FF;
      color: #00F0FF;
      font-weight: 600;
      padding: 0.8rem 2rem;
      border-radius: var(--radius-btn);
      text-decoration: none;
      transition: var(--transition-smooth);
    }
    .btn-outline:hover {
      background: rgba(0,240,255,0.1);
      box-shadow: 0 0 15px rgba(0,240,255,0.3);
    }

    .hero-dashboard {
      flex: 1 1 400px;
      background: rgba(17,22,51,0.7);
      backdrop-filter: blur(12px);
      border-radius: 20px;
      padding: 1.5rem;
      border: 1px solid var(--border-glow);
      box-shadow: var(--shadow-card);
      font-family: var(--font-mono);
      color: #fff;
    }

    /* 数据看板 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 1.5rem;
      margin: 3rem 0;
    }
    .stat-item {
      background: rgba(17,22,51,0.7);
      backdrop-filter: blur(8px);
      padding: 1.8rem 1rem;
      border-radius: var(--radius-card);
      border: 1px solid var(--border-glow);
      text-align: center;
    }
    .stat-number {
      font-size: 3rem;
      font-weight: 700;
      font-family: var(--font-mono);
      background: linear-gradient(180deg, #00F0FF 0%, #00A3FF 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      text-shadow: 0 0 8px rgba(0,240,255,0.4);
    }
    .stat-label {
      color: var(--text-muted);
      font-size: 0.9rem;
      margin-top: 0.4rem;
    }

    /* 服务矩阵 2x3 非对称 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(6,1fr);
      gap: 1.8rem;
      margin-top: 2.5rem;
    }
    .service-card {
      background: var(--card-bg);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-card);
      padding: 2rem 1.5rem;
      transition: var(--transition-smooth);
      box-shadow: var(--shadow-card);
      backdrop-filter: blur(4px);
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(0,240,255,0.4);
    }
    .card-wide { grid-column: span 4; }
    .card-tall { grid-column: span 2; }

    /* 对比模块 */
    .compare-container {
      display: flex;
      gap: 2rem;
      margin-top: 2rem;
    }
    .compare-panel {
      flex: 1;
      background: #111633;
      border-radius: var(--radius-card);
      padding: 2rem;
      border: 1px solid var(--border-glow);
    }
    .diff-highlight { color: #FF3CAC; font-weight: 700; }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .faq-question {
      background: transparent;
      color: #fff;
      width: 100%;
      text-align: left;
      padding: 1.2rem 0;
      font-weight: 600;
      font-size: 1.1rem;
      border: none;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
    }

    .footer {
      background: #040612;
      padding: 3rem 0;
    }

    @keyframes pulse-glow {
      0% { opacity: 0.7; transform: scale(0.9); }
      50% { opacity: 1; transform: scale(1.2); }
      100% { opacity: 0.7; transform: scale(0.9); }
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .stats-grid { grid-template-columns: repeat(2,1fr); }
      .services-grid { grid-template-columns: 1fr; }
      .card-wide, .card-tall { grid-column: span 1; }
      .compare-container { flex-direction: column; }
    }