/* ========== 全局样式 Reset ========== */
    *, *::before, *::after {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    html {
      font-size: 16px;
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif;
      color: #333;
      line-height: 1.6;
      background-color: #f9f9f9;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    ul {
      list-style: none;
    }
    img {
      max-width: 100%;
      display: block;
    }

    /* ========== 顶部导航 ========== */
    header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background-color: #ffffff;
      border-bottom: 1px solid #e0e0e0;
      z-index: 100;
    }
    .nav-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0.5rem 1rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .logo {
      display: flex;
      align-items: center;
    }
    .logo img {
      height: 40px;
    }
    .app-title {
      font-size: 1.5rem;
      font-weight: 700;
      color: #222;
      margin-left: 0.75rem;
      letter-spacing: 1px;
      font-family: 'Segoe UI', 'Arial', 'Helvetica Neue', sans-serif;
    }

.nav-links-group {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}

@media (max-width: 700px) {
  .nav-container {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  .logo {
    margin-bottom: 0.3rem;
  }
  .nav-links-group {
    width: 100%;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between; /* 让两端分开 */
    gap: 0.5rem;
    white-space: nowrap;
    overflow-x: auto;
  }
  .nav-links {
    display: flex !important;
    flex-direction: row !important;
    gap: 0.5rem;
    width: auto !important;
    flex: 1 1 auto;
    min-width: 0;
  }
  .nav-links a {
    display: inline-block !important;
    font-size: 0.97rem;
    padding: 0.4rem 0.7rem;
    white-space: nowrap;
    width: auto !important;
    text-align: center;
  }
  .btn-download {
    display: inline-block !important;
    font-size: 0.97rem;
    padding: 0.4rem 0.7rem;
    white-space: nowrap;
    width: auto !important;
    margin-left: auto;
    flex-shrink: 0; /* 避免按钮被压缩 */
  }
}




    .nav-links a {
      font-size: 1rem;
      font-weight: 500;
      color: #333;
      transition: color 0.2s;
    }
    .nav-links a:hover {
      color: #007aff;
    }
    .btn-download {
      background-color: #007aff;
      color: #fff;
      padding: 0.5rem 1rem;
      border-radius: 4px;
      font-weight: 500;
      transition: background-color 0.2s;
    }
    .btn-download:hover {
      background-color: #005bb5;
    }

    /* 占位：用于让主体内容避开固定导航栏 */
    .nav-spacer {
      height: 64px;
    }

    /* ========== Hero 横幅 ========== */
    .hero {
      background-color: #007aff;
      color: #ffffff;
      padding: 4rem 1rem 6rem;
      text-align: center;
    }
    .hero h1 {
      font-size: 2.5rem;
      font-weight: 700;
      margin-bottom: 1rem;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
      line-height: 1.2;
    }
    .hero p.subtitle {
      font-size: 1.125rem;
      margin-bottom: 2rem;
      opacity: 0.9;
      max-width: 700px;
      margin-left: auto;
      margin-right: auto;
      line-height: 1.5;
    }
    .hero .btn-group {
      display: inline-flex;
      gap: 1rem;
      flex-wrap: wrap;
      justify-content: center;
    }
    .hero .btn-primary {
      background-color: #cc3355;
      color: #fff;
      padding: 0.75rem 1.5rem;
      border-radius: 6px;
      font-size: 1rem;
      font-weight: 600;
      transition: background-color 0.2s;
      border-radius: 24px;
    }
    .hero .btn-primary:hover {
      background-color: #e0b900;
    }
    .hero .btn-secondary {
      background-color: #fff;
      color: #1d77e9;
      padding: 0.75rem 1.5rem;
      border-radius: 6px;
      font-size: 1rem;
      font-weight: 500;
      transition: background-color 0.2s;
      border-radius: 24px;
    }
    .hero .btn-secondary:hover {
      background-color: rgba(255, 255, 255, 0.25);
    }
    .hero .hero-image {
      margin-top: 2rem;
      max-width: 900px;
      margin-left: auto;
      margin-right: auto;
    }
    .hero .hero-image img {
      max-width: 420px;
      width: 100%;
      margin: 0 auto;
      display: block;
      border-radius: 28px;
      /* box-shadow: 0 6px 30px rgba(0,0,0,0.20); */
    }
    @media (max-width: 600px) {
      .hero .hero-image img {
        max-width: 70vw;
      }
    }

    /* ========== 功能亮点 Section ========== */
    .features {
      background-color: #ffffff;
      padding: 4rem 1rem;
    }
    .features .container {
      max-width: 1200px;
      margin: 0 auto;
    }
    .features h2 {
      text-align: center;
      font-size: 2rem;
      font-weight: 700;
      margin-bottom: 2rem;
      color: #222;
    }
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 2rem;
    }
    .feature-card {
      background-color: #f0f8ff;
      border-radius: 10px;
      padding: 2rem 1.5rem;
      text-align: center;
      transition: transform 0.2s, box-shadow 0.2s;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    }
    .feature-card img {
      height: 60px;
      /* margin-bottom: 1rem; */
      border-radius: 16px;
      border: 1px solid #03a9f41f;
      box-shadow: 0 2px 8px rgba(0,0,0,0.05);
      transition: transform 0.2s;
    }
    .feature-card h3 {
      font-size: 1.25rem;
      font-weight: 600;
      margin-bottom: 0.75rem;
      color: #007aff;
    }
    .feature-card p {
      font-size: 0.95rem;
      line-height: 1.5;
      color: #444;
    }

    .feature-header-horizontal {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 1.2rem;
      margin-bottom: 1rem;
    }

    .feature-header-horizontal img {
      height: 72px;
      width: 72px;
      object-fit: contain;
      flex-shrink: 0;
      border-radius: 16px;
    }

    .feature-header-horizontal h3 {
      font-size: 1.35rem;
      font-weight: 700;
      color: #007aff;
      margin: 0;
      flex: 1 1 auto;
      text-align: left;
      /* text-align: center; */
      /* margin-left: -60px; */
      /* 居中效果如需强制：text-align:center; width:100%; */
    }

    /* ========== 屏幕截图 Section ========== */
    .screenshots {
      background-color: #f9f9f9;
      padding: 4rem 1rem;
    }
    .screenshots .container {
      max-width: 1000px;
      margin: 0 auto;
      text-align: center;
    }
    .screenshots h2 {
      font-size: 2rem;
      font-weight: 700;
      margin-bottom: 2rem;
      color: #222;
    }
    .screenshot-carousel {
      display: flex;
      overflow-x: auto;
      scroll-snap-type: x mandatory;
      gap: 1rem;
      padding-bottom: 1rem;
    }
    .screenshot-carousel img {
      flex: 0 0 auto;
      width: 300px;
      height: auto;
      border-radius: 10px;
      /* box-shadow: 0 4px 16px rgba(0,0,0,0.1); */
      scroll-snap-align: center;
    }

    /* ========== 订阅与下载 Section ========== */
    .cta {
      background-color: #ffffff;
      padding: 4rem 1rem;
    }
    .cta .container {
      max-width: 800px;
      margin: 0 auto;
      text-align: center;
    }
    .cta h2 {
      font-size: 2rem;
      font-weight: 700;
      margin-bottom: 1rem;
      color: #222;
    }
    .cta p {
      font-size: 1rem;
      margin-bottom: 1.5rem;
      color: #555;
    }
    .cta .btn-download-store {
      display: inline-block;
      background-color: #ff2d55;
      color: #fff;
      padding: 0.75rem 1.5rem;
      border-radius: 6px;
      font-size: 1rem;
      font-weight: 600;
      transition: background-color 0.2s;
    }
    .cta .btn-download-store:hover {
      background-color: #e0264c;
    }
    .cta .subscription-info {
      margin-top: 2rem;
      font-size: 0.95rem;
      color: #666;
      line-height: 1.5;
    }

    /* ========== 常见问题（FAQ） Section ========== */
    .faq {
      background-color: #f9f9f9;
      padding: 4rem 1rem;
    }
    .faq .container {
      max-width: 900px;
      margin: 0 auto;
    }
    .faq h2 {
      text-align: center;
      font-size: 2rem;
      font-weight: 700;
      margin-bottom: 2rem;
      color: #222;
    }
    .faq-item {
      margin-bottom: 1.5rem;
    }
    .faq-item h3 {
      font-size: 1.125rem;
      font-weight: 600;
      margin-bottom: 0.5rem;
      color: #007aff;
    }
    .faq-item p {
      font-size: 0.95rem;
      color: #444;
      line-height: 1.5;
    }

    /* ========== 底部 Footer ========== */
    footer {
      background-color: #ffffff;
      border-top: 1px solid #e0e0e0;
      padding: 2rem 1rem;
    }
    .footer-container {
      max-width: 1200px;
      margin: 0 auto;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 2rem;
    }
    .footer-logo img {
      height: 36px;
      margin-bottom: 1rem;
    }
    .footer-links {
      display: flex;
      flex-wrap: wrap;
      gap: 2rem;
    }
    .footer-links ul {
      min-width: 120px;
    }
    .footer-links li {
      margin-bottom: 0.5rem;
    }
    .footer-links a {
      font-size: 0.9rem;
      color: #555;
      transition: color 0.2s;
    }
    .footer-links a:hover {
      color: #007aff;
    }
    .footer-copy {
      margin-top: 2rem;
      font-size: 0.85rem;
      color: #999;
      text-align: center;
      width: 100%;
    }

    /* ========== 响应式调整 ========== */
    @media (max-width: 700px) {
      .nav-container {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
      }
      .logo {
        margin-bottom: 0.3rem;
      }
      .nav-links {
        flex-direction: column;
        gap: 0.75rem;
        width: 100%;
      }
      .nav-links a {
        display: block;
        width: 100%;
        text-align: left;
        padding: 0.3rem 0;
      }
    }
    @media (max-width: 600px) {
      .hero .btn-group {
        flex-direction: column;
        gap: 0.75rem;
      }
      .feature-grid {
        grid-template-columns: 1fr;
      }
      .screenshot-carousel img {
        width: 80%;
      }
    }

  .features .container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1rem;
  }
  .feature-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 4rem;
    gap: 3rem;
  }
  .feature-row.reverse {
    flex-direction: row-reverse;
  }
  .feature-text {
    flex: 1 1 300px;
    min-width: 220px;
  }
  .feature-text h3 {
    color: #007aff;
    font-size: 1.45rem;
    font-weight: 700;
    margin-bottom: 1.1rem;
    letter-spacing: 1px;
  }
  .feature-text p {
    font-size: 1.06rem;
    color: #222;
    line-height: 1.9;
  }
  .feature-image {
    flex: 1 1 320px;
    min-width: 220px;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
  }
  .feature-image img {
    max-width: 330px;
    width: 95%;
    margin: 0 auto;
    border-radius: 26px;
    /* box-shadow: 0 6px 24px rgba(0,0,0,0.10); */
    /* background: #fff; */
  }
  @media (max-width: 900px) {
    .feature-row,
    .feature-row.reverse {
      flex-direction: column !important;
      gap: 1.2rem;
      margin-bottom: 2.5rem;
      align-items: stretch;
    }
    .feature-image img {
      max-width: 94vw;
    }
    .feature-text,
    .feature-image {
      min-width: 0;
      text-align: center;
    }
    .feature-text h3, .feature-text p {
      text-align: center;
    }
  }