/* roulang page: index */
:root {
      --primary: #7C3AED;
      --primary-light: #8B5CF6;
      --secondary: #06B6D4;
      --accent: #F97316;
      --bg-deep: #0A0A0F;
      --bg-card: #14141F;
      --bg-alt: #0F0F17;
      --text-primary: #F8FAFC;
      --text-secondary: #94A3B8;
      --text-disabled: #475569;
      --border-glow: rgba(124,58,237,0.15);
      --border-glow-hover: rgba(124,58,237,0.35);
      --shadow-card: 0 0 0 1px rgba(124,58,237,0.1), 0 4px 24px rgba(0,0,0,0.4);
      --shadow-card-hover: 0 0 0 1px rgba(124,58,237,0.3), 0 8px 32px rgba(124,58,237,0.2);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-tag: 6px;
      --font-sans: 'Inter', 'SF Pro Display', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-deep);
      color: var(--text-primary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

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

    a {
      color: var(--secondary);
      text-decoration: none;
      transition: color var(--transition-base), text-decoration var(--transition-base);
    }

    a:hover {
      text-decoration: underline;
      color: #22D3EE;
    }

    button, input {
      font-family: inherit;
      outline: none;
    }

    /* 自定义容器与排版 */
    .container-custom {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }

    @media (min-width: 768px) {
      .container-custom {
        padding-left: 2rem;
        padding-right: 2rem;
      }
    }

    .section-py {
      padding-top: 5rem;
      padding-bottom: 5rem;
    }

    @media (min-width: 1024px) {
      .section-py {
        padding-top: 7rem;
        padding-bottom: 7rem;
      }
    }

    /* 导航栏分屏联动 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 64px;
      background: rgba(10, 10, 15, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-glow);
      z-index: 50;
      display: flex;
      align-items: center;
    }

    .nav-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    .logo-text {
      font-weight: 800;
      font-size: 1.25rem;
      background: linear-gradient(135deg, #7C3AED 0%, #A78BFA 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: -0.02em;
    }

    .nav-links {
      display: none;
      gap: 2rem;
      align-items: center;
    }

    .nav-links a {
      color: var(--text-secondary);
      font-weight: 500;
      font-size: 0.95rem;
      transition: color var(--transition-base);
      text-decoration: none;
      position: relative;
    }

    .nav-links a:hover {
      color: var(--secondary);
      text-decoration: none;
    }

    .nav-links a.active {
      color: white;
    }

    .nav-links a.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--secondary);
      border-radius: 2px;
    }

    .nav-right {
      display: flex;
      align-items: center;
      gap: 1rem;
    }

    .live-ticker {
      display: none;
      background: rgba(20,20,31,0.8);
      border: 1px solid var(--border-glow);
      border-radius: 20px;
      padding: 0.3rem 1rem;
      font-size: 0.8rem;
      color: var(--secondary);
      white-space: nowrap;
    }

    .btn-primary-sm {
      background: var(--primary);
      color: white;
      padding: 0.5rem 1.2rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 0.9rem;
      transition: all var(--transition-base);
      border: none;
      cursor: pointer;
      text-decoration: none;
      display: inline-block;
    }

    .btn-primary-sm:hover {
      background: var(--primary-light);
      box-shadow: 0 0 18px rgba(124,58,237,0.5);
      text-decoration: none;
    }

    .mobile-menu-btn {
      display: block;
      background: none;
      border: none;
      color: white;
      font-size: 1.8rem;
      cursor: pointer;
    }

    @media (min-width: 768px) {
      .nav-links {
        display: flex;
      }
      .live-ticker {
        display: flex;
      }
      .mobile-menu-btn {
        display: none;
      }
    }

    /* 移动端菜单 */
    .mobile-menu {
      display: none;
      position: fixed;
      top: 64px;
      left: 0;
      width: 100%;
      background: rgba(10,10,15,0.98);
      backdrop-filter: blur(20px);
      padding: 1.5rem;
      border-bottom: 1px solid var(--border-glow);
      flex-direction: column;
      gap: 1.5rem;
      z-index: 40;
    }

    .mobile-menu.active {
      display: flex;
    }

    /* Hero 区域 */
    .hero-grid {
      display: flex;
      flex-direction: column;
      gap: 3rem;
      align-items: center;
      padding-top: 6rem;
      padding-bottom: 3rem;
    }

    @media (min-width: 1024px) {
      .hero-grid {
        flex-direction: row;
        align-items: center;
        gap: 2rem;
      }
      .hero-left {
        width: 60%;
      }
      .hero-right {
        width: 40%;
        display: flex;
        justify-content: center;
      }
    }

    .hero-right-card {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-card);
      padding: 1.8rem;
      width: 100%;
      max-width: 380px;
      box-shadow: 0 0 30px rgba(124,58,237,0.1);
      animation: pulseGlow 2.5s infinite alternate;
    }

    @keyframes pulseGlow {
      0% { box-shadow: 0 0 20px rgba(124,58,237,0.15); }
      100% { box-shadow: 0 0 35px rgba(124,58,237,0.35); }
    }

    /* 卡片与数字 */
    .data-number {
      font-weight: 900;
      font-size: 3rem;
      line-height: 1.2;
      font-variant-numeric: tabular-nums;
      color: white;
    }

    @media (min-width: 768px) {
      .data-number {
        font-size: 3.5rem;
      }
    }

    .tag-live {
      background: var(--accent);
      color: white;
      font-weight: 600;
      font-size: 0.7rem;
      padding: 0.2rem 0.6rem;
      border-radius: 20px;
      letter-spacing: 0.5px;
      text-transform: uppercase;
    }

    .service-card, .stat-card, .compare-card {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-card);
      padding: 1.5rem;
      transition: all var(--transition-base);
    }

    .service-card:hover, .stat-card:hover, .compare-card:hover {
      border-color: var(--border-glow-hover);
      box-shadow: var(--shadow-card-hover);
    }

    .vs-divider {
      background: linear-gradient(180deg, #7C3AED, #06B6D4);
      width: 4px;
      height: 60px;
      border-radius: 4px;
    }

    @media (min-width: 768px) {
      .vs-divider {
        width: 60px;
        height: 4px;
        background: linear-gradient(90deg, #7C3AED, #06B6D4);
      }
    }

    /* 表单 */
    .input-field {
      background: var(--bg-deep);
      border: 1px solid var(--secondary);
      color: white;
      padding: 0.9rem 1.2rem;
      border-radius: var(--radius-btn);
      width: 100%;
      transition: border var(--transition-base);
    }

    .input-field:focus {
      border-color: var(--primary);
      box-shadow: 0 0 10px rgba(124,58,237,0.3);
    }

    /* FAQ 手风琴 */
    .faq-item {
      border-bottom: 1px solid var(--border-glow);
      padding: 1.2rem 0;
      cursor: pointer;
    }

    .faq-question {
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--text-primary);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-secondary);
      font-size: 0.95rem;
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      margin-top: 0.8rem;
    }

    .faq-icon {
      color: var(--secondary);
      transition: transform 0.2s;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }