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

    :root {
      --primary-deep: #0B0C1E;
      --accent-purple: #C084FC;
      --accent-gold: #FDE047;
      --bg-light: #FAF9FE;
      --surface-glass: rgba(255, 255, 255, 0.8);
      --text-main: #1E1B2E;
      --text-soft: #4B4A5A;
      --border-light: rgba(192, 132, 252, 0.2);
      --shadow-card: 0 4px 24px rgba(192, 132, 252, 0.12);
      --shadow-hover: 0 8px 32px rgba(192, 132, 252, 0.25);
      --radius-card: 16px;
      --radius-btn: 9999px;
      --radius-input: 12px;
      --font-serif: 'Noto Serif SC', 'Source Han Serif SC', serif;
      --font-sans: 'Inter', 'Noto Sans SC', system-ui, sans-serif;
      --font-mono: 'JetBrains Mono', monospace;
    }

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

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(250, 249, 254, 0.9);
      backdrop-filter: blur(16px);
      box-shadow: 0 4px 20px rgba(11, 12, 30, 0.08);
      z-index: 50;
      padding: 12px 0;
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-family: var(--font-serif);
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--primary-deep);
      letter-spacing: 1px;
      text-decoration: none;
    }
    .logo i {
      color: var(--accent-gold);
      font-size: 2rem;
    }

    .search-wrapper {
      flex: 1;
      max-width: 45%;
      margin: 0 32px;
      position: relative;
    }
    .search-wrapper input {
      width: 100%;
      padding: 14px 24px 14px 48px;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-btn);
      background: rgba(255,255,255,0.6);
      backdrop-filter: blur(8px);
      font-size: 1rem;
      outline: none;
      transition: all 0.25s;
      color: var(--text-main);
    }
    .search-wrapper input:focus {
      border-color: var(--accent-purple);
      box-shadow: 0 0 0 4px rgba(192,132,252,0.3);
    }
    .search-wrapper .fa-search {
      position: absolute;
      left: 20px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--accent-gold);
      font-size: 1.2rem;
    }

    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
    }
    .nav-links a {
      text-decoration: none;
      font-weight: 500;
      color: var(--text-main);
      transition: 0.2s;
      font-size: 1rem;
    }
    .nav-links a:hover {
      color: var(--accent-purple);
    }

    .hamburger {
      display: none;
      background: none;
      border: none;
      font-size: 1.8rem;
      color: var(--primary-deep);
      cursor: pointer;
    }

    /* 移动端导航 */
    @media (max-width: 1024px) {
      .search-wrapper {
        max-width: 100%;
        order: 3;
        margin: 12px 0 0;
      }
      .nav-links {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .nav-links.mobile-open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: rgba(11,12,30,0.95);
        backdrop-filter: blur(20px);
        padding: 24px;
        gap: 20px;
        align-items: center;
      }
      .nav-links.mobile-open a {
        color: white;
        font-size: 1.2rem;
      }
    }

    /* 底部移动搜索 */
    .mobile-bottom-search {
      display: none;
    }
    @media (max-width: 768px) {
      .mobile-bottom-search {
        display: block;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        background: rgba(250,249,254,0.9);
        backdrop-filter: blur(20px);
        padding: 10px 16px;
        z-index: 60;
        border-top: 1px solid var(--border-light);
      }
      .mobile-bottom-search input {
        width: 100%;
        padding: 12px 20px 12px 40px;
        border-radius: 30px;
        border: 1px solid var(--accent-purple);
        background: white;
      }
    }

    /* Hero */
    .hero {
      padding: 140px 0 80px;
      background: radial-gradient(circle at 30% 40%, rgba(192,132,252,0.18) 0%, rgba(11,12,30,0.95) 90%);
      position: relative;
      overflow: hidden;
    }
    .hero::before {
      content: "";
      position: absolute;
      width: 100%;
      height: 100%;
      background: radial-gradient(2px 2px at 15px 60px, #fff, rgba(0,0,0,0)),
                  radial-gradient(2px 2px at 75px 200px, #C084FC, rgba(0,0,0,0)),
                  radial-gradient(3px 3px at 230px 90px, #FDE047, rgba(0,0,0,0));
      background-size: 300px 300px;
      animation: drift 20s infinite linear;
      opacity: 0.6;
    }
    @keyframes drift {
      0% { transform: translate(0,0); }
      100% { transform: translate(-20px, -10px); }
    }
    .hero-container {
      display: flex;
      align-items: center;
      gap: 48px;
      position: relative;
      z-index: 2;
    }
    .hero-text {
      flex: 1;
    }
    .hero h1 {
      font-family: var(--font-serif);
      font-size: 3rem;
      font-weight: 700;
      color: white;
      line-height: 1.3;
    }
    .hero p {
      font-size: 1.2rem;
      color: rgba(255,255,255,0.8);
      margin: 24px 0 32px;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--accent-purple), #a55cf0);
      border: none;
      color: white;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 1.1rem;
      cursor: pointer;
      box-shadow: 0 4px 15px rgba(192,132,252,0.5);
      transition: all 0.25s ease;
      display: inline-block;
      text-decoration: none;
    }
    .btn-primary:hover {
      transform: scale(1.03);
      box-shadow: 0 0 20px rgba(192,132,252,0.8);
    }
    .hero-image {
      flex: 1;
      display: flex;
      justify-content: center;
    }
    .hero-image img {
      max-width: 100%;
      border-radius: 32px;
      box-shadow: 0 20px 40px rgba(192,132,252,0.3);
    }
    @media (max-width: 768px) {
      .hero-container {
        flex-direction: column;
        text-align: center;
      }
      .hero h1 {
        font-size: 2.2rem;
      }
    }

    /* 通用板块 */
    section {
      padding: 80px 0;
    }
    .section-title {
      font-family: var(--font-serif);
      font-size: 2.25rem;
      font-weight: 700;
      color: var(--primary-deep);
      margin-bottom: 16px;
      text-align: center;
    }
    .section-sub {
      text-align: center;
      color: var(--text-soft);
      max-width: 600px;
      margin: 0 auto 48px;
    }

    /* 服务卡片交替布局 */
    .services-grid {
      display: flex;
      flex-direction: column;
      gap: 40px;
    }
    .service-row {
      display: flex;
      align-items: center;
      gap: 40px;
      background: var(--surface-glass);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-card);
    }
    .service-row.reverse {
      flex-direction: row-reverse;
    }
    .service-img {
      flex: 1;
      border-radius: 12px;
      overflow: hidden;
    }
    .service-img img {
      width: 100%;
      display: block;
    }
    .service-content {
      flex: 1;
    }
    .service-content h3 {
      font-family: var(--font-serif);
      font-size: 1.8rem;
      margin-bottom: 12px;
    }
    .btn-ghost {
      color: var(--accent-purple);
      font-weight: 600;
      text-decoration: none;
      margin-top: 16px;
      display: inline-block;
    }
    @media (max-width: 768px) {
      .service-row, .service-row.reverse {
        flex-direction: column;
      }
    }

    /* 优势数据 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 24px;
      text-align: center;
    }
    .stat-number {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--accent-gold);
      font-family: var(--font-serif);
    }
    @media (max-width: 768px) {
      .stats-grid {
        grid-template-columns: repeat(2,1fr);
      }
    }

    /* 案例卡片 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(2,1fr);
      gap: 32px;
    }
    .case-card {
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }
    .case-card img {
      width: 100%;
      height: 240px;
      object-fit: cover;
    }
    @media (max-width: 768px) {
      .cases-grid {
        grid-template-columns: 1fr;
      }
    }

    /* FAQ */
    .faq-item {
      background: white;
      border-radius: 12px;
      margin-bottom: 16px;
      padding: 16px 24px;
      cursor: pointer;
      border-left: 4px solid transparent;
      transition: 0.2s;
    }
    .faq-item.active {
      border-left-color: var(--accent-purple);
      background: #f5f0ff;
    }

    /* 联系 */
    .contact-form input, .contact-form textarea {
      width: 100%;
      padding: 14px;
      border-radius: var(--radius-input);
      border: 1px solid var(--border-light);
      margin-bottom: 16px;
    }

    footer {
      background: var(--primary-deep);
      color: #ccc;
      padding: 48px 0 24px;
    }