/* roulang page: index */
* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    :root {
      --primary-green: #00C853;
      --deep-charcoal: #1A1A1A;
      --electric-purple: #B026FF;
      --amber-gold: #FFAB00;
      --surface-dark: #242424;
      --text-light: #B0B0B0;
      --white: #FFFFFF;
      --card-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
      --glow-green: 0 0 20px rgba(0, 200, 83, 0.6);
      --border-radius-card: 12px;
      --border-radius-btn: 50px;
      --transition-smooth: all 0.3s ease;
      --container-max: 1280px;
      --section-spacing: 100px;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: 'Inter', 'Noto Sans SC', sans-serif;
      background-color: var(--deep-charcoal);
      color: var(--text-light);
      line-height: 1.6;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }

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

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-smooth);
    }

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      background: none;
    }

    /* 导航 */
    #header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(26, 26, 26, 0.85);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--primary-green);
      z-index: 1000;
      padding: 0 24px;
      height: 70px;
      display: flex;
      align-items: center;
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 24px;
      font-weight: 700;
      color: var(--white);
      letter-spacing: 0.5px;
    }

    .logo-icon {
      display: flex;
      align-items: center;
      justify-content: center;
      background: var(--primary-green);
      width: 36px;
      height: 36px;
      border-radius: 8px;
      color: var(--deep-charcoal);
      font-size: 22px;
      font-weight: 800;
    }

    .nav-menu {
      display: flex;
      gap: 32px;
      align-items: center;
    }

    .nav-menu a {
      color: var(--text-light);
      font-weight: 500;
      position: relative;
      padding: 8px 0;
    }

    .nav-menu a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary-green);
      transition: width 0.3s ease;
    }

    .nav-menu a:hover {
      color: var(--primary-green);
    }

    .nav-menu a:hover::after {
      width: 100%;
    }

    .hamburger {
      display: none;
      font-size: 26px;
      color: var(--white);
      background: none;
      border: none;
    }

    .mobile-drawer {
      position: fixed;
      top: 0;
      right: -100%;
      width: 75%;
      max-width: 320px;
      height: 100vh;
      background: var(--surface-dark);
      backdrop-filter: blur(20px);
      z-index: 2000;
      padding: 30px 24px;
      display: flex;
      flex-direction: column;
      gap: 28px;
      transition: right 0.4s ease;
      box-shadow: -10px 0 30px rgba(0,0,0,0.7);
    }

    .mobile-drawer.active {
      right: 0;
    }

    .drawer-close {
      align-self: flex-end;
      font-size: 28px;
      color: var(--white);
      background: transparent;
      border: none;
    }

    .mobile-drawer a {
      font-size: 20px;
      font-weight: 600;
      color: var(--white);
      border-bottom: 1px solid #333;
      padding-bottom: 12px;
    }

    /* Hero */
    #hero {
      margin-top: 70px;
      display: flex;
      min-height: 90vh;
      background-color: var(--deep-charcoal);
    }

    .hero-left {
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: center;
      padding: 0 24px 0 60px;
      background: linear-gradient(135deg, #1a1a1a 0%, #0e0e0e 100%);
    }

    .hero-right {
      flex: 1;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      min-height: 500px;
    }

    .hero-right::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(0,200,83,0.25) 0%, rgba(0,0,0,0.65) 100%);
    }

    .hero-title {
      font-size: 52px;
      font-weight: 800;
      color: var(--white);
      line-height: 1.2;
      letter-spacing: -0.5px;
      margin-bottom: 24px;
      max-width: 600px;
    }

    .hero-sub {
      font-size: 20px;
      color: #ccc;
      margin-bottom: 40px;
      max-width: 500px;
    }

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

    .btn-primary {
      background: linear-gradient(135deg, #00C853, #009688);
      color: var(--white);
      padding: 16px 38px;
      border-radius: var(--border-radius-btn);
      font-weight: 700;
      font-size: 18px;
      letter-spacing: 1px;
      text-transform: uppercase;
      box-shadow: 0 4px 15px rgba(0,200,83,0.4);
      transition: var(--transition-smooth);
    }

    .btn-primary:hover {
      box-shadow: var(--glow-green);
      transform: translateY(-3px);
    }

    .btn-outline {
      border: 2px solid var(--electric-purple);
      color: var(--electric-purple);
      padding: 16px 38px;
      border-radius: var(--border-radius-btn);
      font-weight: 700;
      font-size: 18px;
      background: transparent;
      transition: 0.3s;
    }

    .btn-outline:hover {
      background: var(--electric-purple);
      color: white;
    }

    /* 板块标题 */
    .section-title {
      font-size: 38px;
      font-weight: 700;
      color: var(--white);
      margin-bottom: 16px;
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 0;
      width: 60px;
      height: 4px;
      background: var(--primary-green);
    }

    /* Highlights */
    #highlights {
      padding: var(--section-spacing) 0;
    }
    .grid-highlights {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .highlight-card {
      background: var(--surface-dark);
      border-radius: 8px;
      padding: 32px 24px;
      transition: all 0.3s ease;
      border: 1px solid transparent;
    }
    .highlight-card:hover {
      border-color: var(--electric-purple);
      transform: translateY(-4px);
      box-shadow: var(--card-shadow);
    }
    .highlight-icon {
      font-size: 32px;
      color: var(--primary-green);
      margin-bottom: 16px;
    }
    .highlight-number {
      font-size: 34px;
      font-weight: 700;
      color: var(--amber-gold);
      margin-bottom: 8px;
    }

    /* Services 瀑布流 */
    #services {
      padding: var(--section-spacing) 0;
    }
    .masonry {
      columns: 3;
      column-gap: 24px;
    }
    .service-card {
      background: var(--surface-dark);
      border-radius: var(--border-radius-card);
      padding: 28px;
      margin-bottom: 24px;
      break-inside: avoid;
      transition: 0.3s;
      position: relative;
      overflow: hidden;
    }
    .service-card:hover {
      box-shadow: var(--card-shadow);
    }
    .service-icon {
      font-size: 36px;
      color: var(--primary-green);
      margin-bottom: 16px;
    }
    .service-title {
      font-size: 22px;
      font-weight: 600;
      color: var(--white);
    }

    /* Comparison */
    #comparison {
      padding: var(--section-spacing) 0;
    }
    .compare-table {
      display: flex;
      background: var(--surface-dark);
      border-radius: 12px;
      overflow: hidden;
    }
    .col {
      flex: 1;
      padding: 32px;
    }
    .col-left {
      background: #2a2a2a;
    }
    .col-right {
      background: #1e1e1e;
      border-left: 2px solid var(--primary-green);
    }
    .compare-row {
      display: flex;
      justify-content: space-between;
      padding: 18px 0;
      border-bottom: 1px solid #3a3a3a;
    }

    /* FAQ */
    #faq {
      padding: var(--section-spacing) 0;
    }
    .accordion-item {
      background: var(--surface-dark);
      margin-bottom: 12px;
      border-radius: 8px;
      overflow: hidden;
    }
    .accordion-btn {
      width: 100%;
      text-align: left;
      padding: 20px;
      font-weight: 600;
      color: white;
      background: transparent;
      display: flex;
      justify-content: space-between;
      font-size: 18px;
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      background: #2A2A2A;
      padding: 0 20px;
    }

    /* CTA */
    #cta {
      background: var(--deep-charcoal);
      padding: 80px 24px;
      text-align: center;
    }
    .pulse-btn {
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0% { box-shadow: 0 0 0 0 rgba(0,200,83,0.7); }
      70% { box-shadow: 0 0 0 18px rgba(0,200,83,0); }
      100% { box-shadow: 0 0 0 0 rgba(0,200,83,0); }
    }

    /* Footer */
    #footer {
      background: #111;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 30px;
    }

    @media (max-width: 1024px) {
      .masonry { columns: 2; }
    }
    @media (max-width: 768px) {
      .hamburger { display: block; }
      .nav-menu { display: none; }
      #hero { flex-direction: column; }
      .hero-left { padding: 40px 24px; }
      .hero-right { min-height: 320px; }
      .grid-highlights { grid-template-columns: 1fr; }
      .masonry { columns: 1; }
      .compare-table { flex-direction: column; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .hero-title { font-size: 36px; }
    }