/* roulang page: index */
:root {
      --deep-bg: #0D0B1E;
      --electric-purple: #A855F7;
      --neon-cyan: #00F0FF;
      --champion-gold: #F5A623;
      --card-bg: rgba(255, 255, 255, 0.04);
      --border-soft: rgba(168, 85, 247, 0.15);
      --text-primary: #FFFFFF;
      --text-body: #B0B8D0;
      --text-muted: #6B7194;
      --container-max: 1280px;
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --shadow-card: 0 4px 24px rgba(168, 85, 247, 0.08);
      --shadow-hover: 0 8px 40px rgba(0, 240, 255, 0.15);
      --font-heading: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --font-body: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
      --font-data: "DIN Alternate", "Bebas Neue", "PingFang SC", sans-serif;
    }

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

    body {
      background-color: var(--deep-bg);
      color: var(--text-body);
      font-family: var(--font-body);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease;
    }

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

    /* 导航 */
    .header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(13, 11, 30, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-soft);
    }

    .nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .logo {
      font-size: 1.8rem;
      font-weight: 700;
      font-family: var(--font-heading);
      color: var(--electric-purple);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .logo::before {
      content: "⚡";
      font-size: 1.5rem;
      color: var(--neon-cyan);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }

    .nav-links a {
      font-weight: 500;
      color: var(--text-body);
      padding: 8px 0;
      position: relative;
      font-size: 0.95rem;
      transition: color 0.2s;
    }

    .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(--neon-cyan);
      transition: width 0.25s ease;
    }

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

    .btn-primary {
      background: var(--neon-cyan);
      color: var(--deep-bg);
      font-weight: 600;
      padding: 10px 24px;
      border-radius: 30px;
      font-size: 0.95rem;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: background 0.2s, box-shadow 0.2s;
      border: none;
      cursor: pointer;
      letter-spacing: 0.3px;
    }

    .btn-primary:hover {
      background: #00D4E0;
      box-shadow: 0 0 24px rgba(0, 240, 255, 0.5);
    }

    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--electric-purple);
      color: var(--electric-purple);
      font-weight: 600;
      padding: 10px 24px;
      border-radius: 30px;
      transition: all 0.2s;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
    }

    .btn-outline:hover {
      background: rgba(168, 85, 247, 0.1);
      border-color: #C084FC;
      color: #C084FC;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      color: #fff;
      font-size: 2rem;
      cursor: pointer;
    }

    /* Hero */
    .hero {
      padding: 72px 0 100px;
      background: radial-gradient(circle at 20% 30%, rgba(168,85,247,0.12) 0%, transparent 50%);
      position: relative;
      overflow: hidden;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.9fr;
      gap: 64px;
      align-items: center;
    }

    .hero-content h1 {
      font-size: clamp(2.5rem, 5vw, 3.5rem);
      font-weight: 700;
      line-height: 1.2;
      color: #fff;
      font-family: var(--font-heading);
      letter-spacing: -0.5px;
      margin-bottom: 24px;
    }

    .hero-highlight {
      color: var(--neon-cyan);
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-body);
      margin-bottom: 32px;
      max-width: 540px;
      line-height: 1.7;
    }

    .hero-buttons {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }

    .hero-image {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: 0 0 40px rgba(168, 85, 247, 0.3);
      border: 1px solid var(--border-soft);
    }

    .hero-image img {
      width: 100%;
      height: auto;
      object-fit: cover;
    }

    .hero-image::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(168,85,247,0.2) 0%, transparent 60%);
      pointer-events: none;
    }

    /* 通用板块 */
    .section {
      padding: 100px 0;
    }

    .section-header {
      text-align: center;
      margin-bottom: 64px;
    }

    .section-header h2 {
      font-size: 2.25rem;
      font-weight: 700;
      color: #fff;
      font-family: var(--font-heading);
      margin-bottom: 12px;
    }

    .section-sub {
      color: var(--text-muted);
      font-size: 1.1rem;
    }

    /* 亮点网格 */
    .highlights-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 24px;
    }

    .highlight-card {
      background: var(--card-bg);
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      transition: all 0.25s;
    }

    .highlight-card:hover {
      border-color: var(--neon-cyan);
      box-shadow: var(--shadow-hover);
      background: rgba(255,255,255,0.06);
    }

    .highlight-icon {
      font-size: 2.2rem;
      margin-bottom: 20px;
      color: var(--neon-cyan);
    }

    .highlight-card h3 {
      color: #fff;
      font-size: 1.35rem;
      margin-bottom: 12px;
    }

    /* 服务瀑布流 */
    .services-masonry {
      column-count: 3;
      column-gap: 24px;
    }

    .service-card {
      break-inside: avoid;
      background: var(--card-bg);
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-lg);
      margin-bottom: 24px;
      overflow: hidden;
      transition: transform 0.25s, box-shadow 0.25s;
    }

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

    .service-card img {
      width: 100%;
      height: auto;
    }

    .service-body {
      padding: 24px;
    }

    .service-body h4 {
      color: #fff;
      font-size: 1.3rem;
      margin-bottom: 10px;
    }

    .tag {
      background: rgba(168,85,247,0.2);
      color: var(--electric-purple);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.8rem;
      display: inline-block;
      margin-top: 12px;
    }

    /* 对比 */
    .comparison-row {
      display: grid;
      grid-template-columns: 1fr 40px 1fr;
      align-items: center;
      gap: 32px;
    }

    .vs-divider {
      font-size: 2rem;
      font-weight: 700;
      color: var(--neon-cyan);
      text-shadow: 0 0 12px var(--neon-cyan);
      text-align: center;
    }

    .compare-card {
      background: rgba(255,255,255,0.03);
      border-radius: var(--radius-lg);
      padding: 40px;
      border: 1px solid var(--border-soft);
    }

    .compare-card h3 {
      color: #fff;
      font-size: 1.8rem;
      margin-bottom: 20px;
    }

    .feature-list {
      list-style: none;
      margin-bottom: 28px;
    }

    .feature-list li {
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .check-gold {
      color: var(--champion-gold);
    }

    /* 数据墙 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
      margin-bottom: 60px;
    }

    .stat-number {
      font-family: var(--font-data);
      font-size: 3.5rem;
      background: linear-gradient(135deg, #00F0FF, #A855F7);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      font-weight: 700;
    }

    .badge-wall {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 20px;
    }

    .badge {
      background: rgba(245,166,35,0.12);
      border: 1px solid var(--champion-gold);
      color: var(--champion-gold);
      padding: 12px 24px;
      border-radius: 40px;
      font-weight: 600;
    }

    /* 画廊 */
    .gallery {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      grid-template-areas: "big big small1" "big big small2";
    }

    .gallery-item {
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: 0.25s;
      border: 1px solid transparent;
    }
    .gallery-item:hover {
      border-color: var(--neon-cyan);
      transform: scale(1.01);
    }
    .gallery-item img { width: 100%; height: 100%; object-fit: cover; }

    /* FAQ */
    .faq-list {
      max-width: 780px;
      margin: 0 auto;
    }
    .faq-item {
      border-bottom: 1px solid var(--border-soft);
      padding: 20px 0;
    }
    .faq-question {
      width: 100%;
      background: none;
      border: none;
      color: #fff;
      font-size: 1.15rem;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
      padding: 8px 0;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-body);
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-top: 12px;
    }

    /* CTA */
    .cta-banner {
      background: linear-gradient(135deg, rgba(168,85,247,0.2) 0%, rgba(0,240,255,0.1) 100%);
      border-radius: 32px;
      padding: 80px 40px;
      text-align: center;
      border: 1px solid var(--border-soft);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      padding: 60px 0;
    }

    .copyright {
      border-top: 1px solid var(--border-soft);
      padding: 24px 0;
      text-align: center;
      color: var(--text-muted);
    }

    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; gap: 40px; }
      .services-masonry { column-count: 2; }
      .comparison-row { grid-template-columns: 1fr; }
      .vs-divider { margin: 20px 0; }
      .stats-grid { grid-template-columns: repeat(2,1fr); }
      .gallery { grid-template-columns: 1fr 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .menu-toggle { display: block; }
      .services-masonry { column-count: 1; }
      .hero-buttons { flex-direction: column; align-items: flex-start; }
      .stats-grid { grid-template-columns: 1fr; }
      .gallery { grid-template-columns: 1fr; }
    }