:root {
    --theme-color: #007DFF;
    --theme-color-light: rgba(0, 125, 255, 0.1);
    --page-bg: #f5f6f8;
    --card-bg: #ffffff;
    --text-color: #18222e;
    --text-secondary: #6b7684;
    --border-color: #e4e7ec;
    --radius: 14px;
  }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  [hidden] { display: none !important; }
  html { -webkit-text-size-adjust: 100%; }
  body {
    font-family: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
    background: var(--page-bg);
    color: var(--text-color);
    line-height: 1.6;
    font-size: 15px;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
  }
  .container {
    max-width: 100%;
    width: 100%;
    padding: 16px;
    margin: 0 auto;
    flex: 1;
    display: flex;
    flex-direction: column;
  }

  /* 页首 */
  .site-header { padding: 20px 4px 12px; }
  .site-header h1 {
    font-size: 24px;
    font-weight: 700;
    padding-left: 14px;
    border-left: 6px solid var(--theme-color);
    line-height: 1.3;
    word-break: break-all;
  }
  .site-subtitle { margin-top: 8px; color: var(--text-secondary); padding-left: 20px; }
  .site-subtitle p { display: inline; }
  .site-subtitle a { color: var(--theme-color); }

  /* 站点内容区块：结构化内容块，纵向排列 */
  .site-content {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px 18px;
    margin: 12px 0;
    display: flex;
    flex-direction: column;
    gap: 16px;
  }
  .block-heading {
    font-size: 18px;
    font-weight: 700;
    line-height: 1.4;
    padding-left: 12px;
    border-left: 4px solid var(--theme-color);
    word-break: break-word;
  }
  .block-paragraph {
    line-height: 1.8;
    word-break: break-word;
    white-space: pre-wrap;
  }
  .block-list { padding-left: 22px; display: flex; flex-direction: column; gap: 4px; }
  .block-list li { line-height: 1.7; word-break: break-word; }
  .block-quote {
    padding: 14px 16px 12px 44px;
    background: var(--theme-color-light);
    border-radius: 10px;
    position: relative;
  }
  .block-quote::before {
    content: '\201C';
    position: absolute;
    top: 8px;
    left: 14px;
    font-family: Georgia, serif;
    font-size: 34px;
    line-height: 1;
    color: var(--theme-color);
  }
  .block-quote-text { line-height: 1.7; word-break: break-word; }
  .block-quote-source { margin-top: 6px; font-size: 13px; color: var(--text-secondary); text-align: right; }
  .block-image img { width: 100%; display: block; border-radius: 10px; }
  .block-image figcaption { margin-top: 6px; font-size: 13px; color: var(--text-secondary); text-align: center; }
  .block-cards-title { font-weight: 700; font-size: 15px; margin-bottom: 8px; }
  .block-cards-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
  .block-card {
    padding: 12px;
    background: var(--page-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    transition: border-color 0.15s;
  }
  .block-card:hover { border-color: var(--theme-color); }
  .block-card-title { font-weight: 600; font-size: 14px; margin-bottom: 4px; word-break: break-word; }
  .block-card-text { font-size: 13px; color: var(--text-secondary); line-height: 1.6; word-break: break-word; }
  .block-buttons { display: flex; gap: 10px; flex-wrap: wrap; }
  .block-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(100px, 1fr)); gap: 10px; }
  .block-stat {
    padding: 12px 6px;
    background: var(--theme-color-light);
    border-radius: 10px;
    text-align: center;
  }
  .block-stat-value { font-size: 22px; font-weight: 700; color: var(--theme-color); line-height: 1.3; word-break: break-all; }
  .block-stat-label { font-size: 12px; color: var(--text-secondary); margin-top: 2px; }
  .block-divider { border: none; border-top: 1px solid var(--border-color); }
  .block-table-scroll { overflow-x: auto; }
  .block-table { width: 100%; border-collapse: collapse; font-size: 14px; }
  .block-table caption { caption-side: top; text-align: left; font-size: 13px; color: var(--text-secondary); padding-bottom: 6px; }
  .block-table th { background: var(--theme-color-light); color: var(--theme-color); }
  .block-table th, .block-table td { border: 1px solid var(--border-color); padding: 8px 12px; text-align: left; word-break: break-word; }
  .block-table tbody tr:nth-child(even) { background: var(--page-bg); }
  .block-code { position: relative; }
  .block-code pre { margin: 0; padding: 14px; background: #1f2733; border-radius: 10px; overflow-x: auto; }
  .block-code code { font-family: Consolas, "JetBrains Mono", monospace; font-size: 13px; color: #e6edf3; white-space: pre; }
  .block-code-lang { position: absolute; top: 8px; right: 12px; font-size: 12px; color: #98a5b3; }
  .block-callout { padding: 12px 14px; border-radius: 0 10px 10px 0; border-left: 4px solid; }
  .block-callout-title { font-weight: 600; margin-bottom: 2px; }
  .block-callout-text { line-height: 1.7; word-break: break-word; white-space: pre-wrap; }
  .block-callout.style-info { background: rgba(0, 125, 255, 0.08); border-left-color: #007dff; }
  .block-callout.style-info .block-callout-title { color: #007dff; }
  .block-callout.style-success { background: rgba(0, 178, 74, 0.1); border-left-color: #00a84a; }
  .block-callout.style-success .block-callout-title { color: #00a84a; }
  .block-callout.style-warning { background: rgba(255, 138, 0, 0.12); border-left-color: #c76a00; }
  .block-callout.style-warning .block-callout-title { color: #c76a00; }
  .block-callout.style-error { background: rgba(224, 49, 49, 0.08); border-left-color: #d93026; }
  .block-callout.style-error .block-callout-title { color: #d93026; }
  .block-timeline { display: flex; flex-direction: column; }
  .block-timeline-item { position: relative; padding: 0 0 14px 22px; }
  .block-timeline-item:last-child { padding-bottom: 2px; }
  .block-timeline-item::before {
    content: '';
    position: absolute;
    left: 5px;
    top: 8px;
    bottom: -4px;
    width: 2px;
    background: var(--border-color);
  }
  .block-timeline-item:last-child::before { display: none; }
  .block-timeline-item::after {
    content: '';
    position: absolute;
    left: 0;
    top: 4px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--theme-color);
    box-shadow: 0 0 0 3px var(--theme-color-light);
    box-sizing: border-box;
  }
  .block-timeline-time { font-size: 12px; font-weight: 600; color: var(--theme-color); }
  .block-timeline-text { line-height: 1.6; word-break: break-word; }

  /* 公告条 */
  .announcement-bar {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    margin: 12px 0 16px;
    overflow: hidden;
  }
  .announcement-bar-title {
    font-weight: 600;
    font-size: 14px;
    color: var(--text-secondary);
    padding: 10px 16px 6px;
  }
  .announcement-item { border-top: 1px solid var(--border-color); }
  .announcement-item:first-of-type { border-top: none; }
  .announcement-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    width: 100%;
    min-height: 48px;
    padding: 8px 16px;
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    font: inherit;
    color: inherit;
  }
  .announcement-toggle:hover { background: var(--theme-color-light); }
  .announcement-title { font-weight: 600; flex: 1 1 auto; min-width: 120px; }
  .announcement-badge {
    font-size: 12px;
    padding: 1px 8px;
    border-radius: 10px;
    background: var(--theme-color-light);
    color: var(--theme-color);
    white-space: nowrap;
  }
  .announcement-badge.type-update { background: rgba(0, 178, 74, 0.12); color: #00a84a; }
  .announcement-badge.type-maintenance { background: rgba(255, 138, 0, 0.14); color: #c76a00; }
  .announcement-item.announcement-important .announcement-badge.type-notice { background: rgba(224, 49, 49, 0.12); color: #d93026; }
  .announcement-date { font-size: 12px; color: var(--text-secondary); white-space: nowrap; }

  /* 应用卡片网格 */
  .app-grid { display: grid; grid-template-columns: 1fr; gap: 14px; }
  .app-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    cursor: pointer;
    transition: border-color 0.15s;
  }
  .app-card:hover { border-color: var(--theme-color); }
  .app-card-head { display: flex; gap: 12px; align-items: center; }
  .app-icon {
    width: 52px;
    height: 52px;
    border-radius: 13px;
    object-fit: cover;
    flex: none;
    background: var(--page-bg);
  }
  .app-icon-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    color: #fff;
    background: var(--theme-color);
  }
  .app-card-title h2 { font-size: 17px; font-weight: 600; word-break: break-all; }
  .app-card-meta { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; margin-top: 2px; }
  .app-version {
    font-size: 12px;
    padding: 0 8px;
    border-radius: 10px;
    background: var(--theme-color-light);
    color: var(--theme-color);
  }
  .app-tag { font-size: 12px; color: var(--text-secondary); }
  .app-description {
    color: var(--text-secondary);
    font-size: 14px;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 4;
    overflow: hidden;
  }
  .app-actions { margin-top: auto; display: flex; gap: 10px; flex-wrap: wrap; }
  .app-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    padding: 6px 18px;
    border-radius: 10px;
    font-size: 14px;
    text-decoration: none;
    border: 1px solid transparent;
  }
  .app-button-primary { background: var(--theme-color); color: #fff; }
  .app-button-primary:hover { opacity: 0.88; }
  .app-button-secondary {
    border-color: var(--theme-color);
    color: var(--theme-color);
    background: transparent;
  }
  .app-button-secondary:hover { background: var(--theme-color-light); }

  /* Markdown 通用排版（展示页 / 站点内容 / 公告内容 / 应用描述共用） */
  .md-content h1, .md-content h2, .md-content h3, .md-content h4, .md-content h5, .md-content h6 { margin: 10px 0 6px; line-height: 1.4; }
  .md-content h1 { font-size: 20px; }
  .md-content h2 { font-size: 18px; }
  .md-content h3 { font-size: 16px; }
  .md-content h4, .md-content h5, .md-content h6 { font-size: 15px; }
  .md-content p { margin: 6px 0; }
  .md-content ul, .md-content ol { margin: 6px 0; padding-left: 22px; }
  .md-content blockquote {
    margin: 8px 0;
    padding: 4px 12px;
    border-left: 4px solid var(--theme-color);
    background: var(--theme-color-light);
    border-radius: 0 8px 8px 0;
  }
  .md-content code {
    font-family: Consolas, "JetBrains Mono", monospace;
    font-size: 13px;
    background: rgba(0, 0, 0, 0.06);
    padding: 1px 5px;
    border-radius: 5px;
  }
  .md-content pre {
    margin: 8px 0;
    padding: 12px;
    background: #1f2733;
    border-radius: 10px;
    overflow-x: auto;
  }
  .md-content pre code { background: none; color: #e6edf3; padding: 0; }
  .md-content hr { border: none; border-top: 1px solid var(--border-color); margin: 12px 0; }
  .md-content img { max-width: 100%; border-radius: 8px; }
  .md-content a { color: var(--theme-color); }

  /* 半模态弹层（SM 底部上滑，MD+ 居中弹窗）：公告详情 / 应用详情 */
  .sheet-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    z-index: 100;
  }
  .sheet {
    position: relative;
    width: 100%;
    max-width: 640px;
    max-height: 86vh;
    background: var(--card-bg);
    border-radius: 20px 20px 0 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: sheet-up 0.22s ease;
  }
  /* SM 顶部抓手，提示半模态形态 */
  .sheet::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 4px;
    border-radius: 2px;
    background: rgba(0, 0, 0, 0.15);
    pointer-events: none;
  }
  @keyframes sheet-up {
    from { transform: translateY(40%); opacity: 0.6; }
    to { transform: translateY(0); opacity: 1; }
  }
  @keyframes sheet-pop {
    from { transform: scale(0.92); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
  }
  .sheet-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 18px 18px 14px;
    border-bottom: 1px solid var(--border-color);
  }
  .sheet-header h2 { font-size: 17px; word-break: break-all; }
  .sheet-close {
    background: none;
    border: none;
    font-size: 22px;
    line-height: 1;
    color: var(--text-secondary);
    padding: 4px 8px;
    cursor: pointer;
    flex: none;
  }
  .sheet-body { padding: 16px 18px; overflow-y: auto; }
  .announcement-sheet-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    color: var(--text-secondary);
    font-size: 13px;
    margin-bottom: 10px;
  }
  .app-detail-description { color: var(--text-secondary); font-size: 14px; }
  .app-detail-actions { margin-top: 16px; display: flex; gap: 10px; flex-wrap: wrap; }

  /* 状态提示 */
  .state-box {
    background: var(--card-bg);
    border: 1px dashed var(--border-color);
    border-radius: var(--radius);
    padding: 36px 16px;
    text-align: center;
    color: var(--text-secondary);
  }
  .state-error { border-color: #d93026; color: #d93026; }

  /* 页脚：margin-top:auto 吸收剩余空间，内容不足时固定在视口底部，内容超出时随文档流 */
  .site-footer {
    margin-top: auto;
    padding: 24px 4px 8px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 13px;
  }
  .site-footer div + div { margin-top: 4px; }
  .site-footer a { color: var(--text-secondary); text-decoration: none; }
  .site-footer a:hover { color: var(--theme-color); }

  /* 三端自适应：SM <600 单列；MD 600-840 双列；LG >840 三列、内容区居中限宽 */
  @media (min-width: 600px) {
    .container { padding: 24px; }
    .app-grid { grid-template-columns: repeat(2, 1fr); }
    .sheet-overlay { align-items: center; padding: 16px; }
    .sheet { max-height: calc(100vh - 32px); border-radius: 16px; animation: sheet-pop 0.18s ease; }
    .sheet::before { display: none; }
    .sheet-header { padding: 14px 18px; }
  }
  @media (min-width: 840px) {
    .container { max-width: 1080px; }
    .app-grid { grid-template-columns: repeat(3, 1fr); }
    .site-header h1 { font-size: 28px; }
  }