/* roulang page: index */
:root {
      --primary: #C11B5A;
      --primary-dark: #9A1547;
      --accent: #00F0B5;
      --deep: #1A1A2E;
      --gray-bg: #F7F5F2;
      --white: #FFFFFF;
      --text-main: #1A1A2E;
      --text-secondary: #5A5A72;
      --text-light: #B0B0C0;
      --border-light: #E8E6E1;
      --radius-card: 16px;
      --radius-btn: 40px;
      --radius-badge: 8px;
      --shadow-sm: 0 4px 20px rgba(26, 26, 46, 0.06);
      --shadow-hover: 0 8px 32px rgba(193, 27, 90, 0.12);
      --font-title: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --font-mono: 'Inter', 'DIN Alternate', monospace;
    }

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

    body {
      font-family: var(--font-body);
      font-size: 16px;
      line-height: 1.7;
      color: var(--text-main);
      background-color: var(--white);
      -webkit-font-smoothing: antialiased;
    }

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

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

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

    button {
      font-family: inherit;
      cursor: pointer;
    }

    /* 导航 Header */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: var(--white);
      border-bottom: 1px solid var(--border-light);
      z-index: 1000;
      display: flex;
      align-items: center;
    }

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

    .logo {
      font-family: var(--font-title);
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--primary);
      display: flex;
      align-items: baseline;
      gap: 4px;
    }
    .logo span {
      color: var(--deep);
      font-weight: 600;
      font-size: 1rem;
      margin-left: 2px;
    }

    .nav-menu {
      display: flex;
      gap: 32px;
      align-items: center;
    }

    .nav-menu a {
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--text-main);
      position: relative;
      padding: 4px 0;
    }

    .nav-menu a::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 50%;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: 0.2s ease;
      transform: translateX(-50%);
    }

    .nav-menu a:hover {
      color: var(--primary);
    }
    .nav-menu a:hover::after {
      width: 100%;
    }

    .btn-primary {
      background: var(--primary);
      color: var(--white);
      border: none;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 0.95rem;
      transition: all 0.25s;
      display: inline-block;
      text-align: center;
      box-shadow: 0 4px 12px rgba(193, 27, 90, 0.2);
    }

    .btn-primary:hover {
      background: var(--primary-dark);
      box-shadow: 0 0 16px rgba(193, 27, 90, 0.5);
      color: white;
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      padding: 10px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: all 0.25s;
    }
    .btn-outline:hover {
      background: var(--primary);
      color: white;
      box-shadow: 0 0 12px rgba(193,27,90,0.3);
    }

    .btn-accent {
      background: var(--accent);
      color: var(--deep);
      border: none;
      padding: 16px 40px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      font-size: 1.1rem;
      transition: all 0.3s;
      display: inline-block;
    }
    .btn-accent:hover {
      box-shadow: 0 0 24px rgba(0, 240, 181, 0.5);
    }

    .mobile-menu-toggle {
      display: none;
      font-size: 1.8rem;
      background: none;
      border: none;
      color: var(--deep);
    }

    /* 移动端导航 */
    @media (max-width: 768px) {
      .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        padding: 100px 32px 32px;
        gap: 28px;
        box-shadow: -8px 0 30px rgba(0,0,0,0.1);
        transition: right 0.3s ease;
        align-items: flex-start;
      }
      .nav-menu.active {
        right: 0;
      }
      .mobile-menu-toggle {
        display: block;
        z-index: 1001;
      }
      .nav-menu .btn-primary {
        width: 100%;
      }
    }

    /* Hero */
    .hero {
      padding: 120px 0 80px;
      background: var(--white);
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 48px;
    }
    .hero-left {
      flex: 1 1 45%;
    }
    .hero-right {
      flex: 1 1 55%;
      background: linear-gradient(135deg, #C11B5A 0%, #1A1A2E 100%);
      border-radius: 32px;
      min-height: 420px;
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
      overflow: hidden;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
    }
    .hero-right img {
      max-width: 80%;
      border-radius: 20px;
    }
    h1 {
      font-family: var(--font-title);
      font-size: 3rem;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 20px;
    }
    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-secondary);
      margin-bottom: 28px;
    }
    .badge-row {
      display: flex;
      gap: 16px;
      margin-bottom: 36px;
      flex-wrap: wrap;
    }
    .badge {
      background: var(--deep);
      color: var(--accent);
      padding: 6px 16px;
      border-radius: var(--radius-badge);
      font-size: 0.9rem;
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    @media (max-width: 1024px) {
      .hero-grid {
        flex-direction: column;
      }
      .hero-right {
        min-height: 300px;
        width: 100%;
      }
    }

    /* 通用板块 */
    section {
      padding: 80px 0;
    }
    .section-title {
      font-family: var(--font-title);
      font-size: 2.25rem;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .section-desc {
      color: var(--text-secondary);
      margin-bottom: 48px;
      font-size: 1.1rem;
    }

    /* 亮点网格 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: var(--white);
      padding: 28px 24px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      transition: all 0.25s;
    }
    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .feature-icon {
      width: 64px;
      height: 64px;
      background: #F7F5F2;
      border-radius: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      font-size: 2rem;
      color: var(--primary);
    }
    .feature-card h3 {
      font-size: 1.4rem;
      margin-bottom: 10px;
    }
    .badge-mini {
      background: var(--deep);
      color: var(--accent);
      font-size: 0.8rem;
      padding: 2px 10px;
      border-radius: 20px;
      display: inline-block;
      margin-top: 12px;
    }

    /* 产品卡片 */
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .product-card {
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s;
    }
    .product-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }
    .product-img {
      height: 200px;
      background-color: #ddd;
      background-image: url('/assets/images/coverpic/cover-1.webp');
      background-size: cover;
    }
    .product-content {
      padding: 20px;
    }
    .tag {
      background: var(--primary);
      color: white;
      padding: 2px 12px;
      border-radius: 20px;
      font-size: 0.75rem;
      font-weight: 600;
    }
    .product-content h3 {
      margin: 12px 0 8px;
    }

    /* 数据看板 */
    .data-showcase {
      background: var(--gray-bg);
    }
    .table-comparison {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .plan-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 32px 24px;
      text-align: center;
      box-shadow: var(--shadow-sm);
    }
    .plan-highlight {
      border: 2px solid var(--primary);
      box-shadow: 0 10px 28px rgba(193,27,90,0.1);
    }
    .big-number {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--accent);
      font-family: var(--font-mono);
    }

    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      background: white;
      border-radius: 12px;
      margin-bottom: 16px;
      border: 1px solid var(--border-light);
      transition: 0.2s;
    }
    .faq-question {
      padding: 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      cursor: pointer;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      padding: 0 20px;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-bottom: 20px;
    }
    .faq-item.active {
      border-color: var(--accent);
    }

    /* CTA */
    .cta-block {
      background: linear-gradient(135deg, #1A1A2E 0%, #2a2a4a 100%);
      color: white;
      text-align: center;
      padding: 80px 24px;
      border-radius: 32px;
      margin: 40px 0;
    }

    /* Footer */
    .footer {
      background: var(--deep);
      color: var(--text-light);
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
    }
    .copyright {
      border-top: 1px solid #2a2a4a;
      margin-top: 40px;
      padding-top: 20px;
      text-align: center;
    }

    @media (max-width: 768px) {
      h1 { font-size: 2.2rem; }
      .features-grid, .products-grid, .table-comparison { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .hero-buttons { flex-direction: column; }
    }