/* roulang page: index */
@import url('/assets/css/vendor/1ecd1de215-css2.css');
    :root {
      --primary: #0AEFFF;
      --primary-dark: #00C8D6;
      --secondary-bg: #1A0A2E;
      --secondary-bg-light: #2D1B4E;
      --accent: #FF6B35;
      --text-main: #111827;
      --text-secondary: #6B7280;
      --text-light: #CBD5E1;
      --bg-card: #F4F6F9;
      --bg-light: #F8FAFC;
      --border-light: #E2E6ED;
      --success: #10B981;
      --danger: #EF4444;
      --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
      --shadow-md: 0 12px 28px rgba(0,0,0,0.12);
      --shadow-xl: 0 20px 40px rgba(0,0,0,0.25);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-tag: 20px;
      --radius-panel: 16px;
      --max-width: 1280px;
      --header-height: 72px;
      --transition: 0.25s ease;
      --font-title: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      --font-mono: 'DIN Alternate', 'Roboto Mono', monospace;
    }
    * {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Inter', sans-serif;
      background-color: #FFFFFF;
      color: var(--text-main);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3, h4 {
      font-family: var(--font-title);
      margin: 0;
    }
    h1 {
      font-weight: 800;
      font-size: clamp(2.8rem, 6vw, 3.5rem);
      letter-spacing: -0.5px;
    }
    h2 {
      font-weight: 700;
      font-size: clamp(2rem, 4vw, 2.5rem);
    }
    h3 {
      font-weight: 600;
      font-size: 1.25rem;
    }
    h4 {
      font-weight: 600;
      font-size: 1.1rem;
    }
    .container {
      max-width: var(--max-width);
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    img {
      max-width: 100%;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    button, .btn {
      cursor: pointer;
      transition: var(--transition);
      font-family: inherit;
    }
    .text-mono {
      font-family: var(--font-mono);
      font-weight: 600;
    }
    /* Navbar */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: var(--header-height);
      background: rgba(26, 10, 46, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(10, 239, 255, 0.3);
      z-index: 100;
      display: flex;
      align-items: center;
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .logo {
      font-weight: 800;
      font-size: 1.8rem;
      background: linear-gradient(135deg, #0AEFFF, #00C8D6);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: 1px;
    }
    .nav-links {
      display: flex;
      gap: 2rem;
      align-items: center;
      color: white;
      font-weight: 500;
    }
    .nav-links a {
      font-size: 16px;
    }
    .nav-links a:hover, .nav-links a.active {
      color: var(--primary);
      border-bottom: 2px solid var(--primary);
      padding-bottom: 4px;
    }
    .mega-trigger {
      position: relative;
    }
    .mega-panel {
      position: absolute;
      top: 40px;
      right: 0;
      width: 520px;
      background: white;
      border-radius: var(--radius-panel);
      box-shadow: var(--shadow-xl);
      padding: 24px;
      display: none;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      z-index: 200;
      transition: 0.2s ease;
      transform: translateY(4px);
    }
    .mega-trigger:hover .mega-panel {
      display: grid;
      transform: translateY(0);
    }
    .mega-service {
      background: var(--bg-light);
      border-radius: var(--radius-card);
      padding: 16px;
      transition: 0.2s;
    }
    .mega-service:hover {
      background: white;
      box-shadow: var(--shadow-sm);
    }
    .mega-case img {
      border-radius: 8px;
      height: 70px;
      object-fit: cover;
    }
    /* Hamburger */
    .menu-checkbox {
      display: none;
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
    }
    .hamburger span {
      width: 25px;
      height: 2px;
      background: white;
      transition: 0.3s;
    }
    .mobile-menu {
      display: none;
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .menu-checkbox:checked ~ .mobile-menu {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background: rgba(26,10,46,0.95);
        backdrop-filter: blur(20px);
        padding: 20px;
        gap: 16px;
      }
      .mobile-menu a {
        color: white;
        font-size: 18px;
        border-bottom: 1px solid rgba(255,255,255,0.2);
        padding-bottom: 8px;
      }
    }

    /* Hero */
    .hero {
      min-height: 85vh;
      background: linear-gradient(135deg, #1A0A2E 0%, #2D1B4E 100%);
      display: flex;
      align-items: center;
      padding-top: var(--header-height);
    }
    .hero-clip {
      clip-path: polygon(8% 0, 100% 0, 100% 92%, 92% 100%, 0 100%, 0 8%);
      border: 2px solid rgba(10,239,255,0.6);
      overflow: hidden;
    }

    /* Section */
    .section {
      padding: 100px 0;
    }
    @media (max-width: 768px) {
      .section { padding: 60px 0; }
    }

    .card {
      background: var(--bg-card);
      border-radius: var(--radius-card);
      padding: 32px;
      transition: 0.3s;
      box-shadow: var(--shadow-sm);
    }
    .card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
    }

    .btn-primary {
      background: var(--primary);
      color: var(--secondary-bg);
      font-weight: 600;
      padding: 12px 32px;
      border-radius: var(--radius-btn);
      display: inline-block;
      border: none;
      transition: 0.25s;
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      color: white;
      transform: translateY(-2px);
      box-shadow: 0 0 20px rgba(10,239,255,0.5);
    }
    .btn-outline {
      border: 2px solid var(--primary);
      color: white;
      padding: 10px 32px;
      border-radius: var(--radius-btn);
      background: transparent;
      font-weight: 600;
    }
    .btn-outline:hover {
      background: rgba(255,255,255,0.15);
      border-color: white;
      transform: translateY(-2px);
    }

    .service-tab:checked + label {
      border-left: 4px solid var(--primary);
      background: rgba(10,239,255,0.05);
      font-weight: 600;
    }

    .faq-details[open] summary {
      background: var(--bg-card);
    }
    .faq-details[open] .faq-arrow {
      transform: rotate(180deg);
    }