/* roulang page: index */
:root {
      --deep-cosmic: #1E0A3C;
      --starlight-orange: #FF6B35;
      --nebula-start: #3A1C71;
      --nebula-mid: #D76D77;
      --nebula-end: #FFAF7B;
      --space-gray: #1A1A2E;
      --star-white: #F8F7FF;
      --soft-lavender: #F4F1FA;
      --border-light: #E9E7F0;
      --card-shadow: 0 8px 30px rgba(30, 10, 60, 0.08);
      --card-hover-shadow: 0 18px 40px rgba(30, 10, 60, 0.18);
      --radius-card: 24px;
      --radius-inner: 16px;
      --radius-btn: 50px;
      --transition: 0.25s ease;
      --font-title: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
    }

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

    body {
      font-family: var(--font-title);
      background-color: var(--star-white);
      color: var(--space-gray);
      line-height: 1.7;
      font-weight: 400;
      font-size: 1rem;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

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

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }

    button, .btn {
      cursor: pointer;
      font-family: inherit;
    }

    /* 导航 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(30, 10, 60, 0.75);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      z-index: 100;
      transition: background 0.3s ease, box-shadow 0.3s;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .header.scrolled {
      background: rgba(30, 10, 60, 0.92);
      box-shadow: 0 8px 24px rgba(0,0,0,0.25);
    }

    .nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.5rem;
      color: white;
      letter-spacing: 1px;
    }
    .logo .star-icon {
      font-size: 2rem;
      color: var(--starlight-orange);
      filter: drop-shadow(0 0 6px rgba(255,107,53,0.6));
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
      color: rgba(255,255,255,0.85);
      font-weight: 500;
    }
    .nav-links a {
      position: relative;
      padding: 8px 0;
      font-size: 0.95rem;
      color: rgba(255,255,255,0.85);
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: white;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--starlight-orange);
      transition: width 0.2s ease;
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }

    .btn-capsule {
      background: var(--starlight-orange);
      color: white;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      border: none;
      transition: 0.25s ease;
      box-shadow: 0 4px 12px rgba(255,107,53,0.3);
      white-space: nowrap;
    }
    .btn-capsule:hover {
      background: #E55A2B;
      box-shadow: 0 8px 20px rgba(255,107,53,0.5);
    }

    .hamburger {
      display: none;
      background: transparent;
      border: none;
      color: white;
      font-size: 2rem;
      line-height: 1;
    }

    /* Hero */
    .hero {
      background: linear-gradient(135deg, #1E0A3C 0%, #3A1C71 70%, #D76D77 100%);
      position: relative;
      overflow: hidden;
      padding: 140px 0 100px;
      color: white;
      min-height: 90vh;
      display: flex;
      align-items: center;
    }
    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 40%, rgba(255,175,123,0.15) 0%, transparent 50%);
      pointer-events: none;
    }
    .stars-layer {
      position: absolute;
      width: 100%;
      height: 100%;
      background-image: radial-gradient(2px 2px at 15% 25%, rgba(255,255,255,0.9), transparent),
                        radial-gradient(2px 2px at 75% 60%, rgba(255,255,255,0.7), transparent),
                        radial-gradient(1px 1px at 40% 80%, #FFAF7B, transparent),
                        radial-gradient(1px 1px at 90% 20%, white, transparent);
      background-size: 200px 200px, 300px 300px, 250px 250px, 180px 180px;
      opacity: 0.4;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 700px;
    }
    .hero h1 {
      font-size: 3.2rem;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 1.5rem;
    }
    .hero .subtitle {
      font-size: 1.3rem;
      opacity: 0.9;
      margin-bottom: 2.5rem;
    }
    .hero-buttons {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--starlight-orange);
      color: var(--starlight-orange);
      padding: 10px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: 0.25s;
    }
    .btn-outline:hover {
      background: rgba(255,107,53,0.15);
    }

    .stats-row {
      display: flex;
      justify-content: space-between;
      margin-top: 70px;
      gap: 30px;
      flex-wrap: wrap;
    }
    .stat-item {
      text-align: center;
    }
    .stat-number {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--starlight-orange);
    }
    .stat-label {
      font-size: 1rem;
      opacity: 0.8;
    }

    /* 通用板块 */
    section {
      padding: 90px 0;
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 600;
      margin-bottom: 16px;
      color: var(--deep-cosmic);
    }
    .section-desc {
      color: #4a4a6a;
      max-width: 600px;
      margin-bottom: 48px;
    }

    .bg-soft {
      background: var(--soft-lavender);
    }

    /* 卡片系统 */
    .card {
      background: var(--star-white);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
    }
    .card:hover {
      transform: translateY(-8px);
      box-shadow: var(--card-hover-shadow);
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .icon-circle {
      width: 60px;
      height: 60px;
      background: rgba(58,28,113,0.08);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--starlight-orange);
      font-size: 1.8rem;
    }

    /* 产品服务左右布局 */
    .product-row {
      display: flex;
      gap: 50px;
      align-items: center;
      margin-bottom: 60px;
      flex-wrap: wrap;
    }
    .product-list {
      flex: 1;
    }
    .product-img {
      flex: 1;
      border-radius: 28px;
      overflow: hidden;
      box-shadow: 0 20px 35px rgba(30,10,60,0.2);
    }
    .feature-dot {
      list-style: none;
      padding-left: 0;
    }
    .feature-dot li {
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .dot {
      width: 10px;
      height: 10px;
      background: var(--starlight-orange);
      border-radius: 50%;
    }

    /* 案例滑动 */
    .cases-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 20px;
      scroll-snap-type: x mandatory;
    }
    .case-card {
      min-width: 300px;
      background: white;
      border-radius: 24px;
      padding: 24px;
      box-shadow: var(--card-shadow);
      scroll-snap-align: start;
      flex-shrink: 0;
    }

    /* 价格卡 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      align-items: start;
    }
    .price-card {
      background: white;
      border-radius: 28px;
      padding: 36px 24px;
      box-shadow: var(--card-shadow);
      text-align: center;
      border: 2px solid transparent;
    }
    .price-card.featured {
      border-color: var(--starlight-orange);
      transform: scale(1.02);
    }
    .price {
      font-size: 3rem;
      font-weight: 800;
      color: var(--deep-cosmic);
    }

    /* FAQ */
    .faq-item {
      background: white;
      border-radius: 20px;
      margin-bottom: 16px;
      overflow: hidden;
    }
    .faq-question {
      background: var(--star-white);
      padding: 24px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
      border: none;
      width: 100%;
      text-align: left;
    }
    .faq-answer {
      padding: 0 24px 24px;
      display: none;
    }
    .faq-item.open .faq-answer {
      display: block;
    }

    .cta-final {
      background: linear-gradient(135deg, #3A1C71, #D76D77);
      padding: 90px 0;
      text-align: center;
      color: white;
    }

    footer {
      background: var(--deep-cosmic);
      color: #ccc;
      padding: 64px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }

    @media (max-width: 1024px) {
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .pricing-grid { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: block; }
      .grid-3 { grid-template-columns: 1fr; }
      .hero h1 { font-size: 2.4rem; }
      .stats-row { flex-direction: column; align-items: center; }
      .product-row { flex-direction: column; }
      .footer-grid { grid-template-columns: 1fr; }
    }