/* roulang page: index */
:root {
      --primary: #6C3CF0;
      --primary-glow: rgba(108, 60, 240, 0.35);
      --secondary: #00E5A0;
      --secondary-glow: rgba(0, 229, 160, 0.4);
      --dark-bg: #1A1A2E;
      --card-bg: #FFFFFF;
      --light-bg: #F5F3FF;
      --text-primary: #1A1A2E;
      --text-secondary: #5C5C7B;
      --text-on-dark: #FFFFFF;
      --border-light: rgba(108, 60, 240, 0.1);
      --shadow-card: 0 8px 30px rgba(108, 60, 240, 0.08);
      --shadow-hover: 0 16px 48px rgba(108, 60, 240, 0.18);
      --radius-lg: 24px;
      --radius-md: 16px;
      --radius-pill: 50px;
      --radius-btn: 12px;
      --font-sans: -apple-system, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --font-mono: 'Inter', sans-serif;
      --transition: all 0.25s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--light-bg);
      color: var(--text-primary);
      line-height: 1.7;
      margin: 0;
      overflow-x: hidden;
    }
    h1, h2, h3, .font-mono {
      font-family: var(--font-sans);
    }
    .font-mono, .counter, .btn, .tag, .nav-link {
      font-family: var(--font-mono);
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      height: auto;
    }
    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航 */
    .navbar-custom {
      height: 72px;
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(20px);
      border-bottom: 1px solid var(--border-light);
      display: flex;
      align-items: center;
      padding: 0 32px;
      position: sticky;
      top: 0;
      z-index: 100;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo-icon {
      font-size: 28px;
      color: var(--primary);
    }
    .logo-text {
      font-weight: 800;
      font-size: 1.75rem;
      background: linear-gradient(135deg, var(--primary) 0%, #a78bfa 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .logo-badge {
      background: var(--secondary);
      color: #000;
      font-size: 0.7rem;
      font-weight: 700;
      padding: 2px 10px;
      border-radius: 20px;
      margin-left: 4px;
      letter-spacing: 0.3px;
    }
    .nav-center {
      display: flex;
      gap: 28px;
      margin-left: 40px;
    }
    .nav-link {
      font-weight: 500;
      color: var(--text-primary);
      position: relative;
      padding: 8px 0;
      transition: var(--transition);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--secondary);
      transition: width 0.25s ease;
    }
    .nav-link:hover {
      color: var(--primary);
    }
    .nav-link:hover::after {
      width: 100%;
    }
    .nav-right {
      margin-left: auto;
      display: flex;
      align-items: center;
      gap: 18px;
    }
    .search-box {
      background: #f2f0fc;
      border-radius: 50px;
      padding: 8px 18px;
      display: flex;
      align-items: center;
      gap: 8px;
      border: 1px solid transparent;
      transition: var(--transition);
    }
    .search-box i {
      color: var(--text-secondary);
    }
    .search-box input {
      border: none;
      background: transparent;
      outline: none;
      width: 140px;
      font-size: 0.9rem;
    }
    .search-box:focus-within {
      border-color: var(--primary);
      background: white;
      box-shadow: 0 0 0 3px var(--primary-glow);
    }
    .btn-login {
      color: var(--text-primary);
      font-weight: 500;
      transition: var(--transition);
    }
    .btn-login:hover {
      color: var(--primary);
    }
    .btn-create {
      background: var(--primary);
      color: white;
      border-radius: var(--radius-pill);
      padding: 10px 24px;
      font-weight: 600;
      border: none;
      transition: var(--transition);
      box-shadow: 0 4px 12px var(--primary-glow);
    }
    .btn-create:hover {
      background: #5a2fd9;
      box-shadow: 0 8px 20px var(--primary-glow);
      transform: scale(1.03);
      color: white;
    }
    /* 移动导航 */
    @media (max-width: 992px) {
      .nav-center, .search-box {
        display: none;
      }
      .navbar-custom {
        padding: 0 20px;
      }
    }
    /* Hero */
    .hero-section {
      background: var(--dark-bg);
      min-height: 85vh;
      display: flex;
      align-items: center;
      position: relative;
      overflow: hidden;
      padding: 40px 0;
    }
    .particles {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: radial-gradient(circle at 30% 40%, rgba(108,60,240,0.18) 0%, transparent 50%),
                  radial-gradient(circle at 80% 70%, rgba(0,229,160,0.12) 0%, transparent 50%);
      pointer-events: none;
    }
    .hero-title {
      font-size: 2.9rem;
      font-weight: 800;
      line-height: 1.2;
      background: linear-gradient(to right, var(--primary), var(--secondary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero-desc {
      font-size: 1.25rem;
      color: rgba(255,255,255,0.8);
      max-width: 500px;
      margin: 24px 0 32px;
    }
    .btn-primary-custom {
      background: var(--primary);
      border: none;
      border-radius: var(--radius-pill);
      padding: 14px 36px;
      font-weight: 600;
      color: white;
      transition: var(--transition);
      box-shadow: 0 8px 22px var(--primary-glow);
    }
    .btn-primary-custom:hover {
      background: #5b2ed6;
      transform: translateY(-2px);
      box-shadow: 0 14px 30px var(--primary-glow);
    }
    .btn-outline-neon {
      border: 2px solid var(--secondary);
      color: var(--secondary);
      border-radius: var(--radius-pill);
      padding: 14px 36px;
      font-weight: 600;
      background: transparent;
      transition: var(--transition);
    }
    .btn-outline-neon:hover {
      background: rgba(0,229,160,0.08);
      color: var(--secondary);
    }
    .hero-image {
      border-radius: 24px;
      box-shadow: 0 0 40px rgba(108,60,240,0.4);
      animation: float 4s ease-in-out infinite;
    }
    @keyframes float {
      0% { transform: translateY(0); }
      50% { transform: translateY(-10px); }
      100% { transform: translateY(0); }
    }
    /* 区块标题 */
    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 16px;
    }
    .section-sub {
      color: var(--text-secondary);
      font-size: 1.1rem;
      max-width: 700px;
      margin: 0 auto 48px;
    }
    /* 服务卡片六宫格 */
    .service-card {
      background: var(--card-bg);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      height: 100%;
      border: 1px solid rgba(108,60,240,0.05);
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .service-icon {
      font-size: 2.8rem;
      color: var(--primary);
      margin-bottom: 20px;
      transition: transform 0.2s;
    }
    .service-card:hover .service-icon {
      transform: scale(1.1) rotate(3deg);
    }
    .link-neon {
      color: var(--secondary);
      font-weight: 600;
      transition: var(--transition);
    }
    .link-neon:hover {
      text-decoration: underline;
      color: #00c98b;
    }
    /* 数据条 */
    .stats-bg {
      background: var(--dark-bg);
      border-radius: var(--radius-lg);
      padding: 48px 24px;
    }
    .counter {
      font-size: 3rem;
      font-weight: 800;
      color: var(--secondary);
    }
    /* 案例横向滚动 */
    .case-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 16px;
      scrollbar-width: thin;
      scrollbar-color: var(--primary) #eee;
    }
    .case-card {
      min-width: 300px;
      background: white;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      flex-shrink: 0;
    }
    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .case-img {
      border-radius: 12px 12px 0 0;
      height: 180px;
      object-fit: cover;
    }
    .tag-purple {
      background: rgba(108,60,240,0.1);
      color: var(--primary);
      font-weight: 600;
      font-size: 0.8rem;
      padding: 4px 12px;
      border-radius: 20px;
    }
    /* 左右交替 */
    .alt-row {
      align-items: center;
      margin-bottom: 80px;
    }
    .alt-img {
      border-radius: 24px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.08);
    }
    /* FAQ */
    .accordion-button:not(.collapsed) {
      background-color: rgba(108,60,240,0.04);
      color: var(--primary);
      font-weight: 600;
    }
    .accordion-button:focus {
      box-shadow: 0 0 0 3px var(--primary-glow);
    }
    /* CTA */
    .cta-gradient {
      background: linear-gradient(135deg, var(--primary) 0%, #1a1a2e 100%);
      border-radius: var(--radius-lg);
      padding: 80px 24px;
      position: relative;
    }
    .btn-cta-large {
      background: var(--secondary);
      color: #000;
      font-weight: 700;
      padding: 18px 48px;
      border-radius: 50px;
      font-size: 1.3rem;
      transition: var(--transition);
      border: none;
    }
    .btn-cta-large:hover {
      background: #00d998;
      box-shadow: 0 0 30px var(--secondary-glow);
    }
    footer {
      background: var(--dark-bg);
      color: rgba(255,255,255,0.8);
    }
    .footer-title {
      color: var(--secondary);
      font-weight: 600;
      margin-bottom: 20px;
    }
    .footer-link {
      color: rgba(255,255,255,0.7);
      transition: var(--transition);
    }
    .footer-link:hover {
      color: var(--secondary);
    }
    @media (max-width: 768px) {
      .hero-title {
        font-size: 2.2rem;
      }
      .alt-row {
        flex-direction: column;
      }
    }