/* about.css — 关于页（完全静态、可被搜索引擎与 AI 爬虫读取，不依赖 JS） */

:root {
  --bg-page: #f5ecd7;
  --bg-surface: #fff9f0;
  --bg-hover: #e8d5b5;
  --border: #c4a882;
  --border-soft: #d8c4a3;
  --text-primary: #3d2b1f;
  --text-secondary: #5c3d2e;
  --text-muted: #8b7355;
  --accent-amber: #d9a441;
  --accent-coral: #c0693b;
  --font-display: "Playfair Display", "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-body: "Lora", "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-label: "DM Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-body);
  font-size: 18px; line-height: 1.85;
  color: var(--text-primary); background: var(--bg-page);
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
a { color: var(--accent-coral); text-decoration: none; }
a:hover { color: var(--text-primary); text-decoration: underline; text-underline-offset: 3px; }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.2; margin: 0; color: var(--text-primary); }

.about-topbar {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 22px;
  background: rgba(245, 236, 215, 0.92);
  border-bottom: 1px solid var(--border-soft);
  font-family: var(--font-label); font-size: 13px;
  position: sticky; top: 0; z-index: 10;
}
.about-topbar a { color: var(--text-secondary); text-decoration: none; }
.about-topbar a:hover { color: var(--accent-coral); }
.about-topbar .sep { color: var(--text-muted); }
.about-topbar .spacer { flex: 1; }

.about-wrap { max-width: 860px; margin: 0 auto; padding: 56px 22px 96px; }

.about-hero { margin-bottom: 40px; }
.about-hero h1 {
  font-size: clamp(30px, 5.5vw, 50px); font-weight: 700;
  margin: 0 0 10px;
}
.about-hero .role {
  font-family: var(--font-label); font-size: 14px;
  color: var(--accent-coral); letter-spacing: 0.06em;
  text-transform: uppercase; margin: 0 0 18px;
}
.about-hero .lede { font-size: 20px; color: var(--text-secondary); margin: 0; }

.about-section { margin: 44px 0; }
.about-section > h2 {
  font-size: 26px; font-weight: 700;
  padding-bottom: 10px; margin-bottom: 18px;
  border-bottom: 1px solid var(--border-soft);
}

.about-bio p { margin: 0 0 16px; }
.about-bio strong { color: var(--text-primary); }

/* 产品 listicle */
.app-list { display: grid; gap: 14px; }
.app-item {
  display: block; padding: 18px 20px;
  background: var(--bg-surface);
  border: 1px solid var(--border-soft); border-radius: 8px;
  text-decoration: none; color: inherit;
  transition: border-color .2s, transform .2s;
}
.app-item:hover { border-color: var(--accent-amber); transform: translateY(-2px); text-decoration: none; }
.app-item__head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.app-item__name { font-family: var(--font-display); font-size: 21px; font-weight: 700; color: var(--text-primary); }
.app-item__tagline { font-family: var(--font-label); font-size: 12px; color: var(--text-muted); white-space: nowrap; }
.app-item__desc { margin: 8px 0 10px; color: var(--text-secondary); font-size: 16px; }
.app-item__tags { display: flex; flex-wrap: wrap; gap: 6px; }
.app-item__tags span {
  font-family: var(--font-label); font-size: 11px;
  color: var(--text-secondary); border: 1px solid var(--border);
  border-radius: 3px; padding: 2px 7px; background: var(--bg-page);
}
.app-item__open { font-family: var(--font-label); font-size: 12px; color: var(--accent-coral); }

/* FAQ */
.faq-item { padding: 18px 0; border-bottom: 1px solid var(--border-soft); }
.faq-item:last-child { border-bottom: none; }
.faq-item h3 { font-size: 19px; font-weight: 700; margin: 0 0 10px; }
.faq-item p { margin: 0 0 10px; color: var(--text-secondary); }
.faq-item p:last-child { margin-bottom: 0; }

.about-contact { background: var(--bg-surface); border: 1px solid var(--border); border-radius: 10px; padding: 24px 26px; }
.about-contact ul { margin: 0; padding: 0; list-style: none; }
.about-contact li { margin: 8px 0; }
.about-contact .k { font-family: var(--font-label); font-size: 13px; color: var(--text-muted); margin-right: 10px; }

.about-foot { margin-top: 40px; font-family: var(--font-label); font-size: 13px; color: var(--text-muted); text-align: center; }

@media (max-width: 600px) {
  body { font-size: 17px; }
  .about-wrap { padding: 36px 18px 72px; }
  .app-item__tagline { display: none; }
}