/* =========================================================
   80shihua · 现代杂志风主题
   设计原则：现代 / 图文并茂 / 高对比（色弱友好）/ 深浅色自适应
   ========================================================= */

:root {
  /* ---- 浅色（默认）---- */
  --bg: #ffffff;
  --bg-soft: #f6f5f2;
  --fg: #15171c;          /* 近黑，正文高对比 */
  --fg-muted: #545b66;    /* 弱化文字仍 ≥6:1 */
  --primary: #4f46e5;     /* 靛蓝，色弱友好且对比充分 */
  --primary-strong: #4338ca;
  --accent: #0ea5e9;      /* 青蓝，用于渐变点缀 */
  --violet: #8b5cf6;
  --border: #e7e4de;
  --surface: #ffffff;
  --surface-2: #f1efeb;
  --shadow: 0 1px 2px rgba(20,23,28,.04), 0 8px 24px rgba(20,23,28,.06);
  --shadow-lg: 0 10px 30px rgba(20,23,28,.10), 0 2px 8px rgba(20,23,28,.06);
  --radius: 16px;
  --radius-sm: 10px;
  --maxw: 1120px;
  --header-h: 64px;

  --grad: linear-gradient(120deg, var(--primary) 0%, var(--violet) 45%, var(--accent) 100%);
  --grad-soft: linear-gradient(135deg, rgba(79,70,229,.14), rgba(14,165,233,.12));

  --font-sans: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Source Han Sans SC", "Noto Sans CJK SC", system-ui, -apple-system,
    "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-display: "Space Grotesk", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Source Han Sans SC", system-ui, sans-serif;
  --font-mono: "SFMono-Regular", "JetBrains Mono", Menlo, Consolas,
    "Liberation Mono", monospace;
}

/* ---- 深色（高对比，浅色文字 + 亮蓝主色）---- */
[data-theme="dark"] {
  --bg: #0c0e13;
  --bg-soft: #111319;
  --fg: #eef1f6;
  --fg-muted: #aab2c0;
  --primary: #8b93ff;
  --primary-strong: #aab0ff;
  --accent: #38bdf8;
  --violet: #a78bfa;
  --border: #232733;
  --surface: #14171e;
  --surface-2: #1b1f29;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 10px 30px rgba(0,0,0,.35);
  --shadow-lg: 0 14px 40px rgba(0,0,0,.5);
  --grad: linear-gradient(120deg, #818cf8 0%, #a78bfa 45%, #38bdf8 100%);
  --grad-soft: linear-gradient(135deg, rgba(129,140,248,.18), rgba(56,189,248,.14));
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.75;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-strong); }
a:focus-visible,
button:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; border-radius: 4px; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* 跳到主内容（无障碍） */
.skip-link { position: absolute; left: -999px; }
.skip-link:focus {
  left: 12px; top: 12px; background: var(--primary); color: #fff;
  padding: 8px 14px; border-radius: var(--radius-sm); z-index: 200;
}

/* ============ 顶部导航：毛玻璃吸顶 ============ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  height: var(--header-h);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  height: 100%;
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--fg); }
.brand:hover { text-decoration: none; }
.brand__mark {
  width: 30px; height: 30px; border-radius: 9px;
  background: var(--grad);
  display: grid; place-items: center;
  color: #fff; font-weight: 800; font-family: var(--font-display);
  font-size: 16px; box-shadow: var(--shadow);
}
.brand__name { font-family: var(--font-display); font-weight: 700; font-size: 19px; letter-spacing: .3px; }

.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav a {
  color: var(--fg-muted); font-size: 15.5px; font-weight: 500;
  padding: 8px 12px; border-radius: 999px; transition: color .2s, background .2s;
}
.site-nav a:hover { color: var(--fg); background: var(--surface-2); text-decoration: none; }

.header-right { display: flex; align-items: center; gap: 10px; }
.theme-toggle {
  width: 40px; height: 40px; border-radius: 999px;
  display: grid; place-items: center; cursor: pointer;
  background: var(--surface-2); border: 1px solid var(--border);
  color: var(--fg); font-size: 17px; line-height: 1;
  transition: transform .2s, border-color .2s, color .2s;
}
.theme-toggle:hover { border-color: var(--primary); color: var(--primary); transform: rotate(-12deg); }

/* 阅读进度条 */
.read-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0;
  background: var(--grad); z-index: 150; transition: width .1s linear;
}

/* ============ 首页 Hero ============ */
.hero { position: relative; overflow: hidden; padding: 72px 0 40px; }
.hero__inner { position: relative; z-index: 2; max-width: 760px; }
.hero__kicker {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: var(--primary); margin: 0 0 14px;
}
.hero__kicker::before { content: ""; width: 26px; height: 2px; background: var(--grad); border-radius: 2px; }
.hero__title {
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(38px, 6vw, 68px); line-height: 1.05; letter-spacing: -.01em;
  margin: 0 0 16px;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero__desc { font-size: clamp(17px, 2.2vw, 20px); color: var(--fg-muted); margin: 0 0 26px; max-width: 620px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px; border-radius: 999px; font-weight: 600; font-size: 15.5px;
  border: 1px solid transparent; cursor: pointer; transition: transform .15s, box-shadow .2s, background .2s;
}
.btn--primary { background: var(--grad); color: #fff; box-shadow: var(--shadow); }
.btn--primary:hover { color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-lg); text-decoration: none; }
.btn--ghost { border-color: var(--border); color: var(--fg); background: var(--surface); }
.btn--ghost:hover { border-color: var(--primary); color: var(--primary); text-decoration: none; }

.hero__glow {
  position: absolute; z-index: 1; inset: -30% -10% auto auto;
  width: 560px; height: 560px; pointer-events: none;
  background:
    radial-gradient(circle at 30% 30%, rgba(139,92,246,.22), transparent 60%),
    radial-gradient(circle at 70% 60%, rgba(14,165,233,.20), transparent 60%);
  filter: blur(10px);
}

/* ============ 区块标题 ============ */
.section { padding: 26px 0 8px; }
.section__head {
  display: flex; align-items: baseline; justify-content: space-between; gap: 12px;
  margin-bottom: 22px; padding-bottom: 14px; border-bottom: 1px solid var(--border);
}
.section__title { font-family: var(--font-display); font-size: 26px; font-weight: 700; margin: 0; letter-spacing: -.01em; }
.section__count { color: var(--fg-muted); font-size: 14px; }

/* ============ 文章网格 + 卡片 ============ */
.grid {
  display: grid; gap: 24px;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}
.card {
  display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: color-mix(in srgb, var(--primary) 45%, var(--border)); }
.card__media {
  position: relative; display: block; aspect-ratio: 16 / 9; overflow: hidden;
  background: var(--grad-soft);
}
.card__img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.card:hover .card__img { transform: scale(1.06); }
.card__media.is-broken .card__img { display: none; }
.card__media.is-broken { background: var(--grad-soft); }
.card__ph {
  position: absolute; inset: 0; display: grid; place-items: center;
  font-family: var(--font-display); font-weight: 800; font-size: 64px;
  color: color-mix(in srgb, var(--primary) 55%, var(--fg));
  background: var(--grad-soft);
}
.card__badge {
  position: absolute; left: 12px; top: 12px; z-index: 2;
  background: rgba(12,14,19,.55); color: #fff; backdrop-filter: blur(4px);
  font-size: 12.5px; font-weight: 600; padding: 4px 11px; border-radius: 999px;
  letter-spacing: .02em;
}
.card__body { padding: 18px 18px 20px; display: flex; flex-direction: column; flex: 1; }
.card__title { font-family: var(--font-display); font-size: 19px; font-weight: 700; line-height: 1.35; margin: 0 0 8px; }
.card__title a { color: var(--fg); }
.card__title a:hover { color: var(--primary); text-decoration: none; }
.card__meta { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; color: var(--fg-muted); font-size: 13.5px; }
.card__dot { opacity: .6; }
.card__excerpt { color: var(--fg-muted); font-size: 15px; line-height: 1.65; margin: 10px 0 14px;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.card__more { margin-top: auto; font-weight: 600; font-size: 14.5px; color: var(--primary); }
.card__more span { transition: transform .2s; display: inline-block; }
.card:hover .card__more span { transform: translateX(4px); }

/* 精选（首页首篇）：跨整行、横向布局 */
.card--featured { grid-column: 1 / -1; flex-direction: row; }
.card--featured .card__media { flex: 1 1 52%; aspect-ratio: auto; min-height: 300px; }
.card--featured .card__body { flex: 1 1 48%; padding: 30px 32px; justify-content: center; }
.card--featured .card__title { font-size: 28px; }
.card--featured .card__excerpt { -webkit-line-clamp: 4; font-size: 16px; }

/* ============ 列表页头部 ============ */
.list-head { padding: 40px 0 8px; }
.list-head__kicker { color: var(--primary); font-weight: 700; letter-spacing: .14em; text-transform: uppercase; font-size: 13px; margin: 0 0 8px; }
.list-head__title { font-family: var(--font-display); font-size: clamp(28px, 4vw, 42px); font-weight: 800; margin: 0; letter-spacing: -.01em; }
.list-head__desc { color: var(--fg-muted); margin: 8px 0 0; }

/* ============ 分类 / 标签 聚合 ============ */
.term-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.term-card {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 18px 20px; border-radius: var(--radius-sm);
  background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow);
  color: var(--fg); transition: transform .2s, border-color .2s, box-shadow .2s;
}
.term-card:hover { transform: translateY(-3px); border-color: var(--primary); box-shadow: var(--shadow-lg); text-decoration: none; color: var(--fg); }
.term-card__name { font-weight: 700; font-size: 16.5px; font-family: var(--font-display); }
.term-card__count {
  font-size: 13px; font-weight: 700; color: #fff; background: var(--grad);
  min-width: 30px; text-align: center; padding: 3px 9px; border-radius: 999px;
}

/* ============ 文章正文页 ============ */
.post { max-width: 760px; margin: 0 auto; }
.post-hero { padding: 40px 0 18px; }
.post-kicker { color: var(--primary); font-weight: 700; letter-spacing: .12em; text-transform: uppercase; font-size: 12.5px; margin: 0 0 10px; }
.post-title { font-family: var(--font-display); font-weight: 800; font-size: clamp(28px, 4.4vw, 44px); line-height: 1.18; letter-spacing: -.01em; margin: 0 0 14px; }
.post-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; color: var(--fg-muted); font-size: 14.5px; }
.post-meta .sep { opacity: .5; }

.taxonomy { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 8px; }
.pill {
  display: inline-block; background: var(--surface-2); color: var(--primary-strong);
  border: 1px solid var(--border); border-radius: 999px;
  padding: 4px 13px; font-size: 13.5px; font-weight: 600; transition: background .2s, color .2s;
}
.pill:hover { background: var(--primary); color: #fff; text-decoration: none; border-color: var(--primary); }

.post-divider { height: 1px; background: var(--border); margin: 22px 0; }
.post-cover { margin: 0 0 22px; border-radius: 16px; overflow: hidden; box-shadow: 0 18px 40px -22px rgba(15,23,42,.45); background: var(--surface-2); }
.post-cover img { display: block; width: 100%; height: auto; max-height: 460px; object-fit: cover; }

.post-content { font-size: 17.5px; line-height: 1.85; color: var(--fg); }
.post-content h2 {
  font-family: var(--font-display); font-size: 26px; font-weight: 700; line-height: 1.3;
  margin: 1.8em 0 .6em; scroll-margin-top: 90px;
}
.post-content h2::before {
  content: ""; display: inline-block; width: 8px; height: 22px; vertical-align: -3px;
  margin-right: 10px; border-radius: 4px; background: var(--grad);
}
.post-content h3 { font-family: var(--font-display); font-size: 21px; font-weight: 700; margin: 1.5em 0 .5em; scroll-margin-top: 90px; }
.post-content p { margin: 0 0 1.15em; }
.post-content img {
  width: 100%; border-radius: var(--radius-sm); margin: 1.4em 0;
  border: 1px solid var(--border); box-shadow: var(--shadow);
}
.post-content a { text-decoration: underline; text-underline-offset: 3px; }
.post-content blockquote {
  margin: 1.4em 0; padding: 14px 20px; border-left: 4px solid var(--primary);
  background: var(--surface-2); color: var(--fg-muted); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.post-content blockquote p:last-child { margin-bottom: 0; }
.post-content ul, .post-content ol { padding-left: 1.5em; margin: 0 0 1.15em; }
.post-content li { margin: .35em 0; }
.post-content table { border-collapse: collapse; width: 100%; margin: 1.4em 0; font-size: 15.5px; overflow: hidden; border-radius: var(--radius-sm); box-shadow: var(--shadow); }
.post-content th, .post-content td { border: 1px solid var(--border); padding: 9px 12px; text-align: left; }
.post-content th { background: var(--surface-2); font-weight: 700; }
.post-content code {
  font-family: var(--font-mono); font-size: .875em;
  background: var(--surface-2); padding: 2px 7px; border-radius: 6px; word-break: break-word;
}
.post-content .highlight { margin: 1.4em 0; border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; box-shadow: var(--shadow); }
.post-content pre { background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 16px 18px; overflow: auto; font-family: var(--font-mono); font-size: .875em; line-height: 1.65; }
.post-content .highlight pre { margin: 0; border: 0; border-radius: 0; }
.post-content pre code { background: none; padding: 0; font-size: 1em; }

/* Chroma 高亮（高对比，色弱友好） */
.chroma { color: var(--fg); background: transparent; }
.chroma .line { display: block; }
.chroma .c,.chroma .c1,.chroma .cm,.chroma .cs,.chroma .cp,.chroma .ch { color: #6b7280; font-style: italic; }
.chroma .k,.chroma .kd,.chroma .kn,.chroma .kr,.chroma .kc,.chroma .kt { color: var(--primary-strong); font-weight: 600; }
.chroma .s,.chroma .s1,.chroma .s2,.chroma .sx,.chroma .sr,.chroma .sa { color: #9a5b00; }
.chroma .n,.chroma .mi,.chroma .mf,.chroma .mh,.chroma .mo,.chroma .il { color: #7c2fb5; }
.chroma .o,.chroma .ow { color: #b45309; }
.chroma .nf,.chroma .na { color: #0b6b6b; }
.chroma .nt { color: var(--primary-strong); }
.chroma .nc,.chroma .nn { color: #7c2fb5; }
.chroma .err { color: #9a3412; }

[data-theme="dark"] .chroma { color: #eef1f6; }
[data-theme="dark"] .chroma .c,[data-theme="dark"] .chroma .c1,[data-theme="dark"] .chroma .cm,[data-theme="dark"] .chroma .cs,[data-theme="dark"] .chroma .cp,[data-theme="dark"] .chroma .ch { color: #7b8494; }
[data-theme="dark"] .chroma .k,[data-theme="dark"] .chroma .kd,[data-theme="dark"] .chroma .kn,[data-theme="dark"] .chroma .kr,[data-theme="dark"] .chroma .kc,[data-theme="dark"] .chroma .kt { color: #aab0ff; }
[data-theme="dark"] .chroma .s,[data-theme="dark"] .chroma .s1,[data-theme="dark"] .chroma .s2,[data-theme="dark"] .chroma .sx,[data-theme="dark"] .chroma .sr,[data-theme="dark"] .chroma .sa { color: #e0a96d; }
[data-theme="dark"] .chroma .n,[data-theme="dark"] .chroma .mi,[data-theme="dark"] .chroma .mf,[data-theme="dark"] .chroma .mh,[data-theme="dark"] .chroma .mo,[data-theme="dark"] .chroma .il { color: #c79bff; }
[data-theme="dark"] .chroma .o,[data-theme="dark"] .chroma .ow { color: #e0944f; }
[data-theme="dark"] .chroma .nf,[data-theme="dark"] .chroma .na { color: #5fd0d0; }
[data-theme="dark"] .chroma .nt { color: #aab0ff; }
[data-theme="dark"] .chroma .nc,[data-theme="dark"] .chroma .nn { color: #c79bff; }
[data-theme="dark"] .chroma .err { color: #f0a98a; }
[data-theme="dark"] .post-content .highlight,[data-theme="dark"] .post-content pre { background: #0f1218; border-color: #232733; }
[data-theme="dark"] .post-content th { background: #1b1f29; }
[data-theme="dark"] .post-content blockquote { background: #1b1f29; }

/* 上一篇 / 下一篇 */
.post-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 38px; }
.post-nav a {
  display: block; padding: 16px 18px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--surface); color: var(--fg); transition: transform .2s, border-color .2s, box-shadow .2s;
}
.post-nav a:hover { transform: translateY(-3px); border-color: var(--primary); box-shadow: var(--shadow); text-decoration: none; }
.post-nav .pn-label { display: block; font-size: 13px; color: var(--fg-muted); margin-bottom: 4px; }
.post-nav .pn-title { font-weight: 700; font-family: var(--font-display); line-height: 1.35; }
.post-nav .next { text-align: right; }

/* ============ 分页 ============ */
.pagination { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; justify-content: center; margin: 36px 0 8px; padding: 0; list-style: none; }
.pagination a { display: inline-block; min-width: 40px; text-align: center; padding: 9px 13px; border: 1px solid var(--border); border-radius: 999px; color: var(--fg); font-size: 15px; font-weight: 600; background: var(--surface); transition: background .2s, color .2s, border-color .2s; }
.pagination a:hover { background: var(--surface-2); border-color: var(--primary); color: var(--primary); text-decoration: none; }
.pagination .pagination-current { display: inline-block; min-width: 40px; text-align: center; padding: 9px 13px; background: var(--grad); color: #fff; border: 1px solid transparent; border-radius: 999px; font-weight: 700; }
.pagination-gap { color: var(--fg-muted); padding: 0 2px; }
.pagination-prev, .pagination-next { font-weight: 700; }

/* ============ 搜索页 ============ */
.search-page { padding: 36px 0 24px; }
.search-title { font-family: var(--font-display); font-size: 30px; font-weight: 800; margin: 0 0 6px; }
.search-hint { color: var(--fg-muted); margin: 0 0 22px; }

:root {
  --pagefind-ui-scale: 0.95;
  --pagefind-ui-primary: var(--primary);
  --pagefind-ui-text: var(--fg);
  --pagefind-ui-background: var(--surface);
  --pagefind-ui-border: var(--border);
  --pagefind-ui-tag: var(--surface-2);
  --pagefind-ui-border-width: 1px;
  --pagefind-ui-border-radius: var(--radius-sm);
  --pagefind-ui-font: var(--font-sans);
}
.pagefind-ui__result-link { text-decoration: none; }
.pagefind-ui__result-link:hover { text-decoration: underline; }

[data-theme="dark"] {
  --pagefind-ui-primary: var(--primary);
  --pagefind-ui-text: var(--fg);
  --pagefind-ui-background: var(--surface);
  --pagefind-ui-border: var(--border);
  --pagefind-ui-tag: var(--surface-2);
}
[data-theme="dark"] .pagefind-ui__search-input,
[data-theme="dark"] .pagefind-ui__search-input:focus { background: var(--surface-2) !important; color: var(--fg) !important; border-color: var(--border) !important; box-shadow: none !important; }
[data-theme="dark"] .pagefind-ui__search-input::placeholder { color: var(--fg-muted) !important; opacity: 1 !important; }
[data-theme="dark"] .pagefind-ui__search-clear,
[data-theme="dark"] .pagefind-ui__search-magnifier { background: var(--surface-2) !important; color: var(--fg) !important; }
[data-theme="dark"] .pagefind-ui__filter-label,
[data-theme="dark"] .pagefind-ui__filter-block,
[data-theme="dark"] .pagefind-ui__filter-value,
[data-theme="dark"] .pagefind-ui__filter-value-input { background: var(--surface-2) !important; color: var(--fg) !important; }
[data-theme="dark"] .pagefind-ui__filter-value::before { border-color: var(--border) !important; }
[data-theme="dark"] .pagefind-ui__filter-value::after { background: var(--primary) !important; }
[data-theme="dark"] .pagefind-ui__results-count { color: var(--fg-muted) !important; }
[data-theme="dark"] .pagefind-ui__result { border-color: var(--border) !important; }
[data-theme="dark"] .pagefind-ui__result-link,
[data-theme="dark"] .pagefind-ui__result-title { color: var(--fg) !important; }
[data-theme="dark"] .pagefind-ui__result-excerpt { color: var(--fg-muted) !important; }
[data-theme="dark"] .pagefind-ui__result-excerpt mark { background: #5b4a00 !important; color: #ffec8b !important; }
[data-theme="dark"] .pagefind-ui__result-tags,
[data-theme="dark"] .pagefind-ui__result-tag { background: var(--surface-2) !important; color: var(--fg) !important; border-color: var(--border) !important; }
[data-theme="dark"] .pagefind-ui__button { background: var(--surface-2) !important; color: var(--fg) !important; border-color: var(--border) !important; }
[data-theme="dark"] .pagefind-ui__button:hover { background: var(--primary) !important; color: #0c0e13 !important; }
[data-theme="dark"] .pagefind-ui__loading { color: var(--fg-muted) !important; background-color: var(--fg-muted) !important; }

/* ============ 页脚 ============ */
.site-footer { margin-top: 64px; border-top: 1px solid var(--border); background: var(--bg-soft); }
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; padding: 28px 0; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 700; }
.footer-copy { color: var(--fg-muted); font-size: 14px; }

/* 缺失图片占位 */
.img-missing { margin: 1.4em 0; padding: 1.4rem 1rem; border: 2px dashed var(--border); border-radius: var(--radius-sm); background: var(--surface-2); color: var(--fg-muted); text-align: center; line-height: 1.5; }
.img-missing .im-label { display: block; font-weight: 700; color: var(--primary); letter-spacing: .04em; margin-bottom: .4rem; }
.img-missing .im-desc { display: block; font-size: .92rem; word-break: break-word; }

/* ============ 文章页：目录 + 正文 ============ */
.post-layout { display: grid; grid-template-columns: minmax(0, 1fr); }

.toc {
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--surface); box-shadow: var(--shadow); overflow: hidden;
}
.toc__summary {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 12px 16px; cursor: pointer; list-style: none;
  font-family: var(--font-display); font-weight: 700; font-size: 15px; color: var(--fg);
}
.toc__summary::-webkit-details-marker { display: none; }
.toc__chev { color: var(--fg-muted); font-size: 12px; transition: transform .2s; }
.toc[open] .toc__chev { transform: rotate(180deg); }
.post-toc--auto { display: none; }
.toc__body { padding: 6px 12px 14px; }
.toc__body:empty { display: none; }
.toc__body ul { list-style: none; margin: 0; padding: 0; }
.toc__body ul ul { margin: 2px 0 2px 10px; padding-left: 10px; border-left: 1px solid var(--border); }
.toc__body li { margin: 1px 0; }
.toc__body a {
  display: block; padding: 5px 10px; border-radius: 8px;
  font-size: 13.5px; line-height: 1.5; color: var(--fg-muted);
  border-left: 2px solid transparent;
  transition: color .15s, background .15s, border-color .15s;
}
.toc__body a:hover { color: var(--primary); background: var(--surface-2); text-decoration: none; }
.toc__body a.is-active {
  color: var(--primary); background: var(--surface-2);
  border-left-color: var(--primary); font-weight: 600;
}

@media (min-width: 1180px) {
  .post-layout.has-toc { grid-template-columns: minmax(0, 1fr) 248px; column-gap: 44px; }
  .post-layout.has-toc > .post-toc { grid-column: 2; grid-row: 1; }
  .post-layout.has-toc > .post { grid-column: 1; grid-row: 1; }
  .post-toc__inner {
    position: sticky; top: calc(var(--header-h) + 24px);
    max-height: calc(100vh - var(--header-h) - 48px); overflow-y: auto;
  }
  .toc__summary { pointer-events: none; border-bottom: 1px solid var(--border); }
  .toc__chev { display: none; }
}

/* 阅读时长 / 字数 */
.post-stat {
  display: inline-flex; align-items: center;
  padding: 2px 11px; border-radius: 999px; white-space: nowrap;
  background: var(--surface-2); border: 1px solid var(--border);
  font-size: 13px; font-weight: 600; color: var(--fg-muted);
}

/* ============ 相关文章 ============ */
.related { margin-top: 46px; padding-top: 26px; border-top: 1px solid var(--border); }
.related__head { font-family: var(--font-display); font-size: 20px; font-weight: 700; margin: 0 0 16px; letter-spacing: -.01em; }
.related__grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }
.rel-card {
  display: flex; align-items: center; gap: 12px; padding: 10px 12px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--surface); color: var(--fg);
  transition: transform .2s, border-color .2s, box-shadow .2s;
}
.rel-card:hover { transform: translateY(-3px); border-color: var(--primary); box-shadow: var(--shadow); text-decoration: none; }
.rel-card__thumb {
  width: 74px; height: 56px; flex: none; border-radius: 8px;
  object-fit: cover; background: var(--grad-soft);
}
.rel-card__thumb--ph {
  display: grid; place-items: center; font-family: var(--font-display);
  font-weight: 800; font-size: 24px;
  color: color-mix(in srgb, var(--primary) 60%, var(--fg));
}
.rel-card__body { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.rel-card__title {
  font-size: 14.5px; font-weight: 600; line-height: 1.45;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.rel-card:hover .rel-card__title { color: var(--primary); }
.rel-card__date { font-size: 12.5px; color: var(--fg-muted); }

/* ============ 代码块复制按钮 ============ */
.post-content .highlight { position: relative; }
.copy-btn {
  position: absolute; top: 8px; right: 8px; z-index: 2; cursor: pointer;
  padding: 4px 11px; border-radius: 999px; font-family: var(--font-sans);
  font-size: 12.5px; font-weight: 600; color: var(--fg-muted);
  background: var(--surface); border: 1px solid var(--border);
  opacity: 0; transition: opacity .18s, color .18s, border-color .18s;
}
.post-content .highlight:hover .copy-btn,
.copy-btn:focus-visible { opacity: 1; }
.copy-btn:hover { color: var(--primary); border-color: var(--primary); }
.copy-btn.is-copied { opacity: 1; color: var(--primary); border-color: var(--primary); }
@media (hover: none) { .copy-btn { opacity: 1; } }

/* ============ 页脚（三栏） ============ */
.footer-inner {
  display: grid; grid-template-columns: minmax(0, 1.7fr) repeat(2, minmax(0, 1fr));
  gap: 30px; padding-top: 34px; padding-bottom: 24px; align-items: start;
}
.footer-col { display: flex; flex-direction: column; gap: 7px; }
.footer-col--brand { gap: 10px; }
.footer-desc { margin: 0; color: var(--fg-muted); font-size: 14px; max-width: 44ch; }
.footer-title { font-family: var(--font-display); font-size: 14px; font-weight: 700; margin: 0 0 3px; letter-spacing: .04em; }
.footer-col a { color: var(--fg-muted); font-size: 14.5px; width: fit-content; padding: 2px 0; transition: color .18s; }
.footer-col a:hover { color: var(--primary); text-decoration: none; }
.footer-bottom { padding-bottom: 26px; }

/* ============ 404 ============ */
.nf { padding: 64px 0 44px; text-align: center; }
.nf__code {
  font-family: var(--font-display); font-weight: 800; line-height: 1;
  font-size: clamp(64px, 13vw, 128px); letter-spacing: -.02em; margin: 0 0 10px;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.nf__title { font-family: var(--font-display); font-size: 24px; font-weight: 700; margin: 0 0 10px; }
.nf__desc { color: var(--fg-muted); margin: 0 auto 26px; max-width: 46ch; }
.nf__actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }

/* 返回顶部 */
.to-top {
  position: fixed; right: 22px; bottom: 22px; z-index: 120;
  width: 46px; height: 46px; border-radius: 999px; border: 1px solid var(--border);
  background: var(--surface); color: var(--fg); box-shadow: var(--shadow-lg);
  display: grid; place-items: center; font-size: 19px; cursor: pointer;
  opacity: 0; visibility: hidden; transform: translateY(12px); transition: opacity .25s, transform .25s, visibility .25s;
}
.to-top.show { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { color: var(--primary); border-color: var(--primary); }

/* 进场动效
   用独立的 translate 属性而非 transform，避免覆盖卡片 hover 的 translateY；
   transition 里显式带上 transform / box-shadow / border-color，
   否则会被本规则整体覆盖，导致 hover 时阴影与边框是瞬变的。 */
.reveal {
  --d: calc(min(var(--i, 0), 6) * 55ms);
  opacity: 0; translate: 0 18px;
  transition:
    opacity .55s ease var(--d),
    translate .55s ease var(--d),
    transform .25s ease,
    box-shadow .25s ease,
    border-color .25s ease;
}
.reveal.in { opacity: 1; translate: none; }

/* 错峰入场：同屏多张卡片依次亮起，第 7 个起统一用最大延迟 */
.grid > .card:nth-child(1), .term-grid > .term-card:nth-child(1) { --i: 0; }
.grid > .card:nth-child(2), .term-grid > .term-card:nth-child(2) { --i: 1; }
.grid > .card:nth-child(3), .term-grid > .term-card:nth-child(3) { --i: 2; }
.grid > .card:nth-child(4), .term-grid > .term-card:nth-child(4) { --i: 3; }
.grid > .card:nth-child(5), .term-grid > .term-card:nth-child(5) { --i: 4; }
.grid > .card:nth-child(6), .term-grid > .term-card:nth-child(6) { --i: 5; }
.grid > .card:nth-child(n+7), .term-grid > .term-card:nth-child(n+7) { --i: 6; }

/* 悬停光泽扫过 */
.card__media::after {
  content: ""; position: absolute; inset: 0; z-index: 2; pointer-events: none;
  background: linear-gradient(105deg, transparent 32%, rgba(255,255,255,.42) 50%, transparent 68%);
  transform: translateX(-115%);
  transition: transform .7s cubic-bezier(.22,.61,.36,1);
}
.card:hover .card__media::after { transform: translateX(115%); }
[data-theme="dark"] .card__media::after {
  background: linear-gradient(105deg, transparent 32%, rgba(255,255,255,.16) 50%, transparent 68%);
}

/* 图片淡入 + 加载骨架屏（仅在 JS 可用时启用，无 JS 时图片照常显示） */
.card__img, .post-cover img, .rel-card__thumb { transition: opacity .45s ease; }
.card__img { position: relative; z-index: 1; }
.post-cover img { position: relative; z-index: 1; }
.js .card__img, .js .post-cover img, .js .rel-card__thumb { opacity: 0; }
.js .card__img.is-loaded,
.js .post-cover img.is-loaded,
.js .rel-card__thumb.is-loaded { opacity: 1; }

@keyframes shimmer {
  from { background-position: 180% 0; }
  to { background-position: -80% 0; }
}
.js .card__media:has(.card__img:not(.is-loaded))::before,
.js .post-cover:has(img:not(.is-loaded))::before {
  content: ""; position: absolute; inset: 0; z-index: 0;
  background: linear-gradient(100deg,
    var(--surface-2) 22%,
    color-mix(in srgb, var(--surface-2) 50%, var(--bg)) 46%,
    var(--surface-2) 70%);
  background-size: 220% 100%;
  animation: shimmer 1.5s linear infinite;
}
.post-cover { position: relative; }

/* 标题渐变缓慢流动 */
@keyframes gradflow {
  from { background-position: 0% 50%; }
  to { background-position: 100% 50%; }
}
.hero__title, .nf__code {
  background-size: 220% 100%;
  animation: gradflow 9s ease-in-out infinite alternate;
}

/* 按钮点击涟漪（坐标由 JS 写入 --rx / --ry） */
.btn { position: relative; overflow: hidden; }
.btn::after {
  content: ""; position: absolute; z-index: 1; pointer-events: none;
  left: var(--rx, 50%); top: var(--ry, 50%);
  width: 12px; height: 12px; margin: -6px 0 0 -6px; border-radius: 50%;
  background: currentColor; opacity: 0;
}
.btn:active::after { animation: ripple .55s ease-out; }
@keyframes ripple {
  from { transform: scale(0); opacity: .32; }
  to { transform: scale(26); opacity: 0; }
}

/* 导航下划线生长 + 当前页标记 */
.site-nav a { position: relative; }
.site-nav a::after {
  content: ""; position: absolute; left: 10px; right: 10px; bottom: 3px; height: 2px;
  border-radius: 2px; background: var(--grad);
  transform: scaleX(0); transform-origin: left center;
  transition: transform .28s cubic-bezier(.22,.61,.36,1);
}
.site-nav a:hover::after,
.site-nav a.is-current::after { transform: scaleX(1); }
.site-nav a.is-current { color: var(--fg); font-weight: 600; }

/* 阅读进度条末端微光 */
.read-progress { box-shadow: 0 0 10px color-mix(in srgb, var(--primary) 55%, transparent); }

/* ============ 音乐页 ============ */
.music-page { max-width: 720px; margin: 0 auto; padding: 56px 0 80px; }

.music-hero { text-align: center; margin-bottom: 36px; }
.music-kicker {
  color: var(--primary); font-weight: 700; letter-spacing: .14em;
  text-transform: uppercase; font-size: 12.5px; margin: 0 0 12px;
}
.music-title {
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(30px, 5vw, 46px); line-height: 1.15;
  letter-spacing: -.01em; margin: 0;
}
.music-sub {
  color: var(--fg-muted); font-size: 16px; line-height: 1.7;
  margin: 14px auto 0; max-width: 30em;
}

/* 舞台：居中 + 主色柔光 */
.music-stage { position: relative; display: flex; justify-content: center; }
.music-stage::before {
  content: ""; position: absolute; z-index: 0; pointer-events: none;
  left: 50%; top: 50%; width: 460px; height: 460px; max-width: 130%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, color-mix(in srgb, var(--primary) 22%, transparent) 0%, transparent 66%);
  filter: blur(30px); opacity: .9;
}

/* 播放器卡片：与网易云 iframe（330×450）同宽，圆角裁切 */
.music-card {
  position: relative; z-index: 1;
  width: 360px; max-width: 100%;
  border-radius: 16px; overflow: hidden;
  background: #fff; /* 播放器为浅色，固定白底避免深色模式出现断层 */
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  transition: transform .3s cubic-bezier(.22,.61,.36,1), box-shadow .3s;
}
.music-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 50px -18px rgba(15,23,42,.4);
}
/* APlayer 融入卡片：去掉其自带边框/阴影，由卡片统一包边 */
.music-card .aplayer {
  margin: 0; border: 0; border-radius: 0; box-shadow: none;
  font-family: var(--font-sans);
}
.music-card .aplayer-list::-webkit-scrollbar { width: 6px; }
.music-card .aplayer-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.music-note {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: center;
  gap: 8px 14px; margin: 26px 0 0; text-align: center;
  color: var(--fg-muted); font-size: 14.5px;
}
.music-note__dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--grad); display: inline-block;
}
.music-note a { font-weight: 600; text-decoration: none; }
.music-note a:hover { text-decoration: underline; text-underline-offset: 3px; }

[data-theme="dark"] .music-card {
  border-color: color-mix(in srgb, var(--primary) 30%, var(--border));
  box-shadow: 0 26px 60px -20px rgba(0,0,0,.75);
}
[data-theme="dark"] .music-stage::before { opacity: .65; }

@media (max-width: 640px) {
  .music-page { padding: 40px 0 64px; }
  .music-card { width: 100%; }
}

/* ============ 响应式 ============ */
@media (max-width: 860px) {
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 24px; }
  .footer-col--brand { grid-column: 1 / -1; }
  .card--featured { flex-direction: column; }
  .card--featured .card__media { min-height: 220px; }
  .card--featured .card__body { padding: 22px; }
  .card--featured .card__title { font-size: 23px; }
}
@media (max-width: 640px) {
  body { font-size: 16.5px; }
  .container, .wrap { padding: 0 16px; }
  .site-nav a { padding: 8px 9px; font-size: 14.5px; }
  .site-nav a::after { left: 6px; right: 6px; bottom: 2px; }
  .brand__name { font-size: 17px; }
  .hero { padding: 48px 0 28px; }
  .grid { grid-template-columns: 1fr; gap: 18px; }
  .post-nav { grid-template-columns: 1fr; }
  .post-nav .next { text-align: left; }
  .post-content { font-size: 16.5px; }
  .footer-inner { grid-template-columns: 1fr; gap: 22px; }
  .rel-card__thumb { width: 62px; height: 48px; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; translate: none; transition: none; }
  .card:hover, .card--featured:hover { transform: none; }
  .card:hover .card__img { transform: none; }
  .to-top, .theme-toggle, .btn, .term-card, .post-nav a, .rel-card { transition: none; }
  .rel-card:hover, .toc__chev { transform: none; }
  .card__media::after { display: none; }
  .hero__title, .nf__code { animation: none; }
  .btn:active::after { animation: none; }
  .js .card__media:has(.card__img:not(.is-loaded))::before,
  .js .post-cover:has(img:not(.is-loaded))::before { animation: none; }
}