/* roulang page: index */
:root {
      --bg-deep: #0B0C0E;
      --card-bg: #1A1C20;
      --accent-orange: #FF4F1E;
      --accent-cyan: #00E5FF;
      --text-white: #FFFFFF;
      --text-gray: #9CA3AF;
      --text-dark-gray: #6B7280;
      --border-subtle: rgba(255, 255, 255, 0.05);
      --border-hover: rgba(0, 229, 255, 0.3);
      --shadow-glow: 0 8px 30px rgba(0, 229, 255, 0.08);
      --radius-card: 16px;
      --radius-btn: 10px;
      --radius-pill: 20px;
      --transition-smooth: 0.3s ease;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      background-color: var(--bg-deep);
      color: var(--text-white);
      font-family: 'Inter', 'SF Pro Display', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition-smooth);
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }
    @media (max-width: 640px) {
      .container {
        padding: 0 1rem;
      }
    }
    /* 导航样式 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 50;
      background-color: rgba(11, 12, 14, 0.85);
      backdrop-filter: blur(20px);
      border-bottom: 1px solid var(--border-subtle);
      padding: 0.75rem 0;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
    }
    .logo-text {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--text-white);
      letter-spacing: -0.02em;
      display: flex;
      align-items: center;
      gap: 0.25rem;
    }
    .logo-icon {
      color: var(--accent-orange);
      font-size: 1.8rem;
      transform: rotate(15deg);
    }
    .search-box {
      position: relative;
      flex: 1;
      max-width: 420px;
      margin: 0 1.5rem;
    }
    .search-box input {
      width: 100%;
      background-color: var(--card-bg);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: 24px;
      padding: 0.7rem 1rem 0.7rem 2.8rem;
      color: var(--text-white);
      font-size: 0.95rem;
      transition: all var(--transition-smooth);
    }
    .search-box input:focus {
      outline: none;
      border-color: var(--accent-cyan);
      box-shadow: 0 0 0 2px rgba(0,229,255,0.2);
    }
    .search-box i {
      position: absolute;
      left: 1rem;
      top: 50%;
      transform: translateY(-50%);
      color: var(--accent-cyan);
      font-size: 1rem;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 1.8rem;
      font-weight: 500;
      font-size: 0.95rem;
    }
    .nav-links a {
      color: var(--text-gray);
      transition: color var(--transition-smooth);
    }
    .nav-links a:hover {
      color: var(--accent-orange);
    }
    .cta-micro {
      background-color: var(--accent-orange);
      color: white !important;
      padding: 0.5rem 1.2rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: background 0.2s, box-shadow 0.2s;
    }
    .cta-micro:hover {
      background-color: #FF6B3D;
      box-shadow: 0 4px 14px rgba(255,79,30,0.4);
    }
    .hamburger {
      display: none;
      font-size: 1.6rem;
      color: var(--text-gray);
      cursor: pointer;
    }
    @media (max-width: 1024px) {
      .search-box {
        max-width: 280px;
        margin: 0 1rem;
      }
      .nav-links {
        gap: 1.2rem;
      }
    }
    @media (max-width: 768px) {
      .hamburger {
        display: block;
      }
      .nav-links, .search-box {
        display: none;
        width: 100%;
      }
      .nav-links.mobile-active {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
        padding: 1rem 0 0.5rem;
      }
      .search-box.mobile-active {
        display: block;
        margin: 0.5rem 0 1rem;
      }
    }
    /* 通用区块 */
    section {
      padding: 6rem 0;
    }
    @media (max-width: 768px) {
      section {
        padding: 4rem 0;
      }
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      margin-bottom: 1rem;
      letter-spacing: -0.02em;
    }
    .section-subtitle {
      color: var(--text-gray);
      font-size: 1.1rem;
      max-width: 600px;
      margin-bottom: 3rem;
    }
    .card {
      background-color: var(--card-bg);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-card);
      padding: 2rem;
      transition: all var(--transition-smooth);
    }
    .card:hover {
      border-color: var(--border-hover);
      transform: translateY(-6px);
      box-shadow: var(--shadow-glow);
    }
    .btn-primary {
      background-color: var(--accent-orange);
      color: white;
      font-weight: 600;
      padding: 0.8rem 2rem;
      border-radius: var(--radius-btn);
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      transition: background 0.2s, box-shadow 0.2s;
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      background-color: #FF6B3D;
      box-shadow: 0 4px 20px rgba(255,79,30,0.5);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--accent-cyan);
      color: var(--accent-cyan);
      font-weight: 600;
      padding: 0.8rem 2rem;
      border-radius: var(--radius-btn);
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      transition: all 0.2s;
      cursor: pointer;
    }
    .btn-outline:hover {
      background-color: rgba(0,229,255,0.1);
      border-color: var(--accent-cyan);
    }
    /* 案例横向滚动 */
    .scroll-x {
      display: flex;
      gap: 1.5rem;
      overflow-x: auto;
      padding-bottom: 1rem;
      scrollbar-width: thin;
      scrollbar-color: var(--accent-cyan) var(--card-bg);
    }
    .scroll-x::-webkit-scrollbar {
      height: 4px;
    }
    .scroll-x::-webkit-scrollbar-thumb {
      background: var(--accent-cyan);
      border-radius: 4px;
    }
    .faq-item {
      background-color: var(--card-bg);
      border-radius: 12px;
      margin-bottom: 1rem;
      padding: 1.2rem 1.5rem;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.3s;
    }
    .faq-item.active {
      border-left: 4px solid var(--accent-cyan);
      background-color: #22252A;
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      color: white;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: var(--text-gray);
      margin-top: 0;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      margin-top: 1rem;
    }
    .faq-item.active .faq-question {
      color: var(--accent-orange);
    }
    footer {
      background-color: var(--bg-deep);
      border-top: 1px solid var(--border-subtle);
      padding: 3rem 0;
      color: var(--text-gray);
      font-size: 0.9rem;
    }