/*
 * 博客、反馈页（Pages Functions 服务端渲染，见 website-app/）的样式。
 * 顶栏、页脚、按钮和配色跟首页模板 scripts/website/page.mjs 保持一致，改那边记得同步这里。
 */
:root {
  --bg: #f8fbff;
  --panel: #ffffff;
  --line: rgba(7, 29, 68, 0.10);
  --line-2: rgba(7, 29, 68, 0.17);
  --text: #071d44;
  --dim: #4f6380;
  --faint: #697b93;
  --blue: #216ff0;
  --link: #135cca;
  --green: #188b6b;
  --red: #c4372b;
  --grad: linear-gradient(110deg, #216ff0 0%, #1594f5 100%);
  --font: "Segoe UI Variable Text", "Segoe UI", -apple-system, system-ui, sans-serif;
}
:root:lang(zh-CN) { --font: "Segoe UI Variable Text", "Segoe UI", "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", sans-serif; }
:root:lang(zh-TW) { --font: "Segoe UI Variable Text", "Segoe UI", "Microsoft JhengHei UI", "Microsoft JhengHei", "PingFang TC", sans-serif; }
:root:lang(ja) { --font: "Segoe UI Variable Text", "Segoe UI", "Yu Gothic UI", "Meiryo UI", "Hiragino Sans", sans-serif; }

* { box-sizing: border-box; margin: 0; padding: 0; }
body { background: var(--bg); color: var(--text); font: 16px/1.7 var(--font); -webkit-font-smoothing: antialiased; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
main.wrap { max-width: 820px; min-height: 60vh; }

/* ---------- 顶栏 ---------- */
header.nav {
  position: sticky; top: 0; z-index: 20;
  background: rgba(248, 251, 255, 0.88);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--line);
}
header.nav .wrap { display: flex; align-items: center; gap: 28px; height: 72px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand .brand-mark { width: 44px; height: 44px; }
.brand .brand-wordmark { width: 136px; height: auto; }
nav.links { display: flex; gap: 26px; margin-left: auto; }
nav.links a { color: var(--dim); text-decoration: none; font-size: 14.5px; }
nav.links a:hover { color: var(--text); }

.lang { position: relative; }
.lang summary {
  list-style: none; cursor: pointer; display: flex; align-items: center; gap: 6px;
  height: 36px; padding: 0 10px; border-radius: 9px; color: var(--dim); font-size: 14px;
}
.lang summary::-webkit-details-marker { display: none; }
.lang summary:hover, .lang[open] summary { color: var(--text); background: rgba(33, 111, 240, 0.08); }
.lang summary svg { width: 18px; height: 18px; }
.lang .menu {
  position: absolute; right: 0; top: 44px; min-width: 160px; padding: 6px;
  background: var(--panel); border: 1px solid var(--line-2); border-radius: 12px;
  box-shadow: 0 16px 40px rgba(7, 29, 68, 0.14);
}
.lang .menu a { display: block; padding: 8px 12px; border-radius: 8px; text-decoration: none; font-size: 14.5px; color: var(--dim); }
.lang .menu a:hover { background: rgba(33, 111, 240, 0.08); color: var(--text); }
.lang .menu a[aria-current] { color: var(--text); font-weight: 600; }
.lang .menu a[aria-current]::after { content: "✓"; float: right; color: var(--green); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 44px; padding: 0 20px; border-radius: 11px;
  font: 600 15px/1 var(--font); text-decoration: none; white-space: nowrap; cursor: pointer;
  border: 1px solid var(--line-2); color: var(--text); background: transparent;
}
.btn:hover { border-color: rgba(33, 111, 240, 0.4); }
.btn--primary { background: var(--grad); border-color: transparent; color: #fff; box-shadow: 0 8px 24px rgba(33, 111, 240, 0.24); }
.btn:disabled { opacity: 0.6; cursor: default; }

/* ---------- 页头 ---------- */
.page-head { padding: 64px 0 28px; }
.page-head h1 { font-size: clamp(30px, 5vw, 44px); line-height: 1.15; letter-spacing: -0.5px; }
.page-head p { color: var(--dim); margin-top: 12px; font-size: 17px; }
.page-head .btn { margin-top: 20px; }
.rss { color: var(--link); font-size: 14px; margin-left: 6px; }

/* ---------- 文章列表 ---------- */
.post-list { list-style: none; display: grid; gap: 16px; padding-bottom: 40px; }
.post-list a {
  display: grid; grid-template-columns: 200px 1fr; gap: 20px; align-items: start;
  padding: 18px; border-radius: 16px; background: var(--panel); border: 1px solid var(--line);
  text-decoration: none; transition: border-color 0.15s ease, transform 0.15s ease;
}
.post-list a:not(:has(img)) { grid-template-columns: 1fr; }
.post-list a:hover { border-color: rgba(33, 111, 240, 0.35); transform: translateY(-1px); }
.post-list img { width: 200px; aspect-ratio: 16 / 10; object-fit: cover; border-radius: 10px; }
.post-list h2 { font-size: 19px; line-height: 1.35; }
.post-list p { color: var(--dim); margin-top: 6px; font-size: 15px; }
.post-list time { display: block; color: var(--faint); font-size: 13.5px; margin-top: 8px; }
.empty { color: var(--dim); padding: 24px 0 64px; }

/* ---------- 文章页 ---------- */
.post { padding: 40px 0 48px; }
.crumb a { color: var(--link); text-decoration: none; font-size: 14.5px; }
.post h1 { font-size: clamp(28px, 4.6vw, 40px); line-height: 1.2; margin-top: 16px; letter-spacing: -0.4px; }
.post .meta { color: var(--faint); font-size: 14px; margin-top: 12px; }
.post .langs { color: var(--dim); font-size: 14px; margin-top: 6px; }
.post .langs a { color: var(--link); }

.prose { margin-top: 32px; font-size: 17px; line-height: 1.8; }
.prose > * + * { margin-top: 18px; }
.prose h2 { font-size: 25px; line-height: 1.3; margin-top: 44px; }
.prose h3 { font-size: 20px; line-height: 1.35; margin-top: 32px; }
.prose a { color: var(--link); }
.prose ul, .prose ol { padding-left: 26px; }
.prose li + li { margin-top: 6px; }
.prose img { border-radius: 12px; border: 1px solid var(--line); margin: 8px auto; }
.prose blockquote { border-left: 4px solid rgba(33, 111, 240, 0.35); padding: 4px 0 4px 18px; color: var(--dim); }
.prose code { font: 0.88em ui-monospace, "Cascadia Code", Consolas, monospace; background: var(--panel); border: 1px solid var(--line); border-radius: 5px; padding: 1px 5px; }
.prose pre { background: #0d1b33; color: #e6edf7; border-radius: 12px; padding: 16px 18px; overflow-x: auto; font-size: 14.5px; line-height: 1.6; }
.prose pre code { background: none; border: 0; padding: 0; color: inherit; }
.prose table { border-collapse: collapse; width: 100%; font-size: 15.5px; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--line-2); padding: 8px 12px; text-align: left; }
.prose th { background: var(--panel); }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 36px 0; }

.cta {
  display: flex; align-items: center; gap: 18px; margin-top: 56px; padding: 22px 24px;
  border-radius: 16px; background: var(--panel); border: 1px solid var(--line);
}
.cta img { width: 52px; height: 52px; flex: none; }
.cta p { color: var(--dim); flex: 1; }

/* ---------- 反馈表单 ---------- */
.feedback { display: grid; gap: 8px; max-width: 640px; padding-bottom: 64px; }
.feedback label { font-weight: 600; font-size: 15px; margin-top: 12px; }
.feedback textarea, .feedback input {
  width: 100%; font: 16px/1.6 var(--font); color: var(--text); background: var(--panel);
  border: 1px solid var(--line-2); border-radius: 11px; padding: 12px 14px;
}
.feedback textarea { resize: vertical; min-height: 160px; }
.feedback textarea:focus, .feedback input:focus { outline: 2px solid rgba(33, 111, 240, 0.35); outline-offset: 1px; border-color: var(--blue); }
.feedback small { color: var(--faint); font-size: 13.5px; }
.feedback .cf-turnstile { margin-top: 16px; min-height: 65px; }
.feedback .btn { justify-self: start; margin-top: 4px; }
.feedback .status:empty { display: none; }
.feedback .status.ok { color: var(--green); font-weight: 600; }
.feedback .status.err { color: var(--red); }
.feedback .note { color: var(--faint); font-size: 13.5px; margin-top: 8px; }
.feedback .note a { color: var(--link); }

/* ---------- 页脚 ---------- */
footer.site { padding: 40px 0 56px; color: var(--faint); font-size: 14px; }
footer.site .wrap { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; border-top: 1px solid var(--line); padding-top: 28px; }
footer.site .brand .brand-mark { width: 30px; height: 30px; }
footer.site .brand .brand-wordmark { width: 96px; }
footer.site a { color: var(--faint); text-decoration: none; }
footer.site a:hover { color: var(--text); }
footer.site .right { margin-left: auto; }

:lang(zh) h1, :lang(zh) h2, :lang(zh) h3, :lang(ja) h1, :lang(ja) h2, :lang(ja) h3 { letter-spacing: 0; }

@media (max-width: 900px) {
  nav.links { display: none; }
  .lang { margin-left: auto; }
  .lang summary span { display: none; }
  footer.site .right { margin-left: 0; }
}
@media (max-width: 640px) {
  .wrap { padding: 0 16px; }
  header.nav .wrap { gap: 12px; }
  .page-head { padding: 40px 0 20px; }
  .post-list a { grid-template-columns: 1fr; }
  .post-list img { width: 100%; }
  .cta { flex-direction: column; align-items: flex-start; }
}

/* 面包屑、主题标签、文章标签、相关文章 */
nav.crumb { font-size: 13.5px; color: var(--faint); margin-bottom: 14px; }
nav.crumb a { color: var(--dim); text-decoration: none; }
nav.crumb a:hover { color: var(--blue); }
.topics { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 22px; }
.topics a { padding: 5px 12px; border: 1px solid var(--line-2); border-radius: 999px; font-size: 13.5px; color: var(--dim); text-decoration: none; }
.topics a span { color: var(--faint); margin-left: 3px; }
.topics a:hover { color: var(--blue); border-color: var(--blue); }
.post-list .cat { color: var(--faint); font-size: 13.5px; }
.post .tags { margin: 22px 0 0; font-size: 14px; color: var(--faint); }
.post .tags a { margin-right: 8px; color: var(--dim); text-decoration: none; }
.post .tags a:hover { color: var(--blue); }
.related { margin-top: 32px; padding-top: 20px; border-top: 1px solid var(--line); }
.related h2 { font-size: 18px; margin-bottom: 10px; }
.related ul { list-style: none; display: grid; gap: 8px; }
.related a { color: var(--blue); text-decoration: none; }
.related a:hover { text-decoration: underline; }