*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--font-body); font-size: var(--size); line-height: var(--leading); -webkit-font-smoothing: antialiased; }
a { color: inherit; }
button { font: inherit; color: inherit; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip { position: fixed; left: 0.75rem; top: 0.75rem; z-index: 20; padding: 0.4rem 0.7rem; background: var(--surface); color: var(--ink); border: 1px solid var(--line); transform: translateY(-200%); }
.skip:focus { transform: none; }

:root {
  --bg: #e7edf2; --ink: #17252f; --muted: #4c5b69; --line: rgba(23, 37, 47, 0.16);
  --surface: #f7fafc; --code: rgba(23, 37, 47, 0.06); --accent: #a8382f; --accent-soft: rgba(168, 56, 47, 0.1);
  --font-body: "LXGW WenKai", "Kaiti SC", "STKaiti", "KaiTi", "楷体", serif;
  --size: 18px; --leading: 1.78; --display: var(--font-body);
  --radius: 3px; --frame: 42rem; --gap: 0.5rem;
}
html[data-theme="dark"] {
  --bg: #131c24; --ink: #e6eef4; --muted: #a8b8c5; --line: rgba(230, 238, 244, 0.18);
  --surface: #1b2630; --code: rgba(230, 238, 244, 0.07); --accent: #f08b7f; --accent-soft: rgba(240, 139, 127, 0.14);
}

body { font-family: var(--font-body); }
h1, h2, h3 { font-family: var(--display); font-weight: 600; line-height: 1.3; overflow-wrap: break-word; }
p { margin: 0; }

.frame { position: relative; max-width: var(--frame); margin: 0 auto; padding: var(--frame-pad); min-height: 100vh; }
.margin-line { position: absolute; left: var(--rule-left); top: 0; bottom: 0; width: var(--rule-width); background: var(--rule-color); }
.read-mark { display: block; width: 100%; height: 0; background: var(--accent); }

.top { position: sticky; top: 0; z-index: 4; background: var(--bg); }
.mast { display: flex; align-items: flex-end; justify-content: space-between; gap: 0.75rem 1.25rem; flex-wrap: wrap; padding-bottom: 0.9rem; }
.mast-copy { min-width: 0; }
.site-name { font-family: var(--display); font-size: 1.06rem; letter-spacing: 0.01em; }
.site-name a { text-decoration: none; }
.lede { color: var(--muted); font-size: 0.86rem; margin-top: 0.15rem; }
.back { margin: 0; font-size: 0.86rem; }
.back a { text-decoration: none; color: var(--muted); }
.back a:hover { color: var(--ink); }

.toolbar { display: flex; align-items: center; gap: 0.4rem; flex-wrap: wrap; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; padding: 2px; background: var(--surface); }
.seg button { border: 0; background: none; cursor: pointer; padding: 0.16rem 0.62rem; border-radius: 999px; font-size: 0.76rem; color: var(--muted); line-height: 1.5; }
.seg button[aria-pressed="true"] { background: var(--accent-soft); color: var(--ink); box-shadow: inset 0 0 0 1px var(--line); }

.finder { display: flex; align-items: baseline; gap: 0.6rem 0.9rem; flex-wrap: wrap; padding: 0.15rem 0 0.55rem; }
.search { flex: 1 1 16rem; display: block; min-width: 0; }
.search input { width: 100%; font: inherit; font-size: 0.88rem; color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 999px; padding: 0.34rem 0.9rem; }
.search input::placeholder { color: var(--muted); opacity: 0.9; }
.search input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.search input::-webkit-search-cancel-button { -webkit-appearance: none; }
.result { color: var(--muted); font-size: 0.78rem; white-space: nowrap; font-variant-numeric: tabular-nums; }

.chips { display: flex; flex-wrap: wrap; gap: 0.2rem 0.95rem; padding-bottom: 0.7rem; }
.chips a { text-decoration: none; font-size: 0.86rem; padding: 0.12rem 0; color: var(--muted); }
.chips a:hover { color: var(--ink); }
.chips a[aria-current="true"] { color: var(--ink); box-shadow: inset 0 -2px 0 var(--accent); }
.chips a.is-quiet .count { opacity: 0.55; }
.count { font-size: 0.72em; margin-left: 0.3em; color: var(--muted); font-variant-numeric: tabular-nums; }

#writing { padding-top: 0.4rem; }
#writing .shelf { display: block; }
body[data-filter="life"] #writing .shelf[data-cat]:not([data-cat="life"]),
body[data-filter="work"] #writing .shelf[data-cat]:not([data-cat="work"]),
body[data-filter="tips"] #writing .shelf[data-cat]:not([data-cat="tips"]),
body[data-filter="travel"] #writing .shelf[data-cat]:not([data-cat="travel"]),
body[data-filter="hobby"] #writing .shelf[data-cat]:not([data-cat="hobby"]) { display: none; }
body[data-filter="all"] #writing .shelf.is-empty { display: none; }
body.is-searching .empty-shelves,
body:not([data-filter="all"]) .empty-shelves { display: none; }
.shelf > h2 { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.shelf.is-empty > h2 { position: static; width: auto; height: auto; margin: 0 0 0.55rem; clip: auto; font-size: 1.9rem; white-space: normal; }
.shelf.is-empty .empty { color: var(--muted); }
.shelf.is-empty { padding: 0.9rem 0 3rem; }
.empty-shelves { color: var(--muted); font-size: 0.9rem; margin-top: 1.2rem; }
.empty-hint { color: var(--muted); font-size: 0.9rem; }
.empty-hint a { color: var(--ink); text-decoration: none; margin-left: 0.6rem; box-shadow: inset 0 -1px 0 var(--accent); }

.entry a { display: block; min-width: 0; text-decoration: none; }
.entry h1, .entry h3 { margin: 0; }
.entry p { color: var(--muted); }
.entry time { color: var(--muted); font-size: 0.78rem; font-variant-numeric: tabular-nums; }
.entry a:hover h1, .entry a:hover h3 { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 0.14em; }

.foot { margin-top: 2.5rem; padding-top: 0.9rem; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.8rem; display: flex; justify-content: space-between; gap: 0.4rem 1.2rem; flex-wrap: wrap; }
.foot-note { opacity: 0.85; }

/* ---------- essay ---------- */
.essay .cat { font-size: 0.82rem; color: var(--muted); }
.essay .cat a { text-decoration: none; }
.essay h1 { margin: 0.35rem 0 0.6rem; font-size: clamp(1.6rem, 4vw, 2.2rem); }
.byline { display: flex; align-items: baseline; gap: 0.85rem; flex-wrap: wrap; color: var(--muted); font-size: 0.82rem; }
.byline span::before { content: "·"; margin-right: 0.6rem; opacity: 0.6; }
.essay .ai { margin-top: 0.5rem; font-size: 0.8rem; color: var(--muted); }
.toc { margin: 1.4rem 0 0; padding: 0.7rem 0.95rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); font-size: 0.86rem; }
.toc summary { display: flex; justify-content: space-between; gap: 1rem; cursor: pointer; color: var(--muted); list-style: none; padding: 0.05rem 0; }
.toc summary::-webkit-details-marker { display: none; }
.toc summary::after { content: "展开"; font-size: 0.78rem; }
.toc[open] summary::after { content: "收起"; }
.toc-count { margin-left: auto; margin-right: 0.7rem; font-size: 0.78rem; opacity: 0.8; }
.toc ol { list-style: none; margin: 0.55rem 0 0.1rem; padding: 0; max-height: 17rem; overflow: auto; overscroll-behavior: contain; }
.toc li a { text-decoration: none; display: block; padding: 0.16rem 0; color: var(--muted); line-height: 1.5; }
.toc li a:hover { color: var(--accent); }
.toc .lvl-2 a { color: var(--ink); }
.toc .lvl-3 { padding-left: 1rem; }
.toc .lvl-3 a { font-size: 0.94em; }
.toc a.is-reading { color: var(--accent); box-shadow: inset 2px 0 0 var(--accent); padding-left: 0.5rem; }
.toc-rail { display: none; }
.essay-layout { display: block; }

@media (min-width: 1120px) {
  html[data-look="sheet"] .frame.is-essay,
  html[data-look="pages"] .frame.is-essay { max-width: 62rem; }
  html[data-look="index"] .frame.is-essay { max-width: 62rem; }
  .essay-layout { display: grid; grid-template-columns: minmax(0, 1fr) 15rem; column-gap: 2.5rem; align-items: start; }
  .toc-rail { display: block; position: sticky; top: 5.5rem; }
  .toc-rail .toc { margin-top: 0.4rem; padding: 0.75rem 0.9rem; }
  .toc-rail .toc ol { max-height: calc(100vh - 14rem); }
  .toc-rail .toc summary { pointer-events: none; }
  .toc-rail .toc summary::after { content: ""; }
  .toc-slot { display: none; }
  html[data-look="pages"] .toc-rail .toc { background: var(--surface); }
}

.prose { max-width: 68ch; margin-top: 1.6rem; }
.prose > *:first-child { margin-top: 0; }
.prose p, .prose li { line-height: 1.9; margin: 0.95rem 0; }
.prose h2 { font-size: 1.32rem; margin: 2.1rem 0 0.55rem; }
.prose h2::before { content: ""; display: block; width: 2.1rem; height: 2px; background: var(--accent); margin-bottom: 0.6rem; opacity: 0.55; }
.prose h3 { font-size: 1.1rem; margin: 1.5rem 0 0.35rem; }
.prose a { text-decoration: underline; text-underline-offset: 0.16em; text-decoration-color: var(--accent); }
.prose blockquote { margin: 1.2rem 0; padding: 0.15rem 0 0.15rem 1rem; border-left: 2px solid var(--accent); color: var(--muted); }
.prose blockquote p { margin: 0.3rem 0; }
.prose pre { overflow: auto; padding: 0.9rem 1rem; background: var(--code); border-radius: var(--radius); font-size: 0.86rem; }
.prose code { font-family: "Sarasa Mono SC", "Cascadia Code", Consolas, monospace; font-size: 0.9em; }
.prose ul, .prose ol { padding-left: 1.3rem; }
.prose img { max-width: 100%; height: auto; border-radius: var(--radius); }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 1.8rem 0; }
.prose strong { font-weight: 700; }

.essay-end { margin-top: 2.6rem; }
.pager { display: grid; gap: 0.6rem; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); padding-top: 1rem; }
.pager a { display: block; text-decoration: none; padding: 0.7rem 0.85rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); min-width: 0; }
.pager a span { display: block; font-size: 0.74rem; color: var(--muted); margin-bottom: 0.2rem; }
.pager a strong { font-weight: 600; font-size: 0.94rem; line-height: 1.45; display: block; }
.pager a:hover { border-color: var(--accent); }
.pager-next { text-align: right; grid-column: 2; }
.essay-tools { display: flex; align-items: center; gap: 0.6rem 1rem; flex-wrap: wrap; margin-top: 1rem; font-size: 0.84rem; }
.copy { cursor: pointer; background: none; border: 1px solid var(--line); border-radius: 999px; padding: 0.28rem 0.8rem; color: var(--muted); }
.copy:hover { color: var(--ink); border-color: var(--accent); }
.copy.is-done { color: var(--ink); border-color: var(--accent); }
.back-home { text-decoration: none; color: var(--muted); }
.back-home:hover { color: var(--ink); }

.to-top { position: fixed; right: 1rem; bottom: 1.1rem; z-index: 6; border: 1px solid var(--line); background: var(--surface); color: var(--muted); border-radius: 999px; padding: 0.32rem 0.8rem; font-size: 0.78rem; cursor: pointer; opacity: 0; transform: translateY(8px); transition: opacity 160ms ease, transform 160ms ease; pointer-events: none; }
.to-top.is-on { opacity: 1; transform: none; pointer-events: auto; }

/* ---------- look: 稿纸 ---------- */
html[data-look="sheet"] {
  --bg: #e7edf2; --ink: #17252f; --muted: #4c5b69; --line: rgba(23, 37, 47, 0.16);
  --surface: #f4f8fb; --accent: #a8382f;
  --font-body: "LXGW WenKai", "Kaiti SC", "STKaiti", "KaiTi", "楷体", serif;
  --size: 18.5px; --leading: 1.8;
  --frame: 42rem; --frame-pad: 2.2rem 1.15rem 3.5rem 2.1rem; --rule-left: 0.7rem; --rule-width: 2px; --rule-color: rgba(168, 56, 47, 0.85);
}
html[data-look="sheet"][data-theme="dark"] {
  --bg: #131c24; --ink: #e6eef4; --muted: #a3b3c0; --line: rgba(230, 238, 244, 0.17);
  --surface: #1a252f; --accent: #ef8b7e; --rule-color: rgba(239, 139, 126, 0.8);
}
html[data-look="sheet"] .entry { border-top: 1px solid var(--line); padding: 1rem 0 1.1rem; }
html[data-look="sheet"] .entry:first-child { border-top: 0; }
html[data-look="sheet"] .entry time { display: block; margin-bottom: 0.2rem; }
html[data-look="sheet"] .entry h3 { font-size: 1.24rem; }
html[data-look="sheet"] .entry p { margin-top: 0.3rem; font-size: 0.96rem; }
html[data-look="sheet"] .is-latest h1 { font-size: clamp(1.7rem, 5vw, 2.35rem); }
html[data-look="sheet"] .is-latest p { font-size: 1rem; }
html[data-look="sheet"] .essay .cat { letter-spacing: 0.02em; }
html[data-look="sheet"] .prose { max-width: 33rem; }

/* ---------- look: 书架 ---------- */
html[data-look="index"] {
  --bg: #e9eee5; --ink: #18231a; --muted: #4b5a4a; --line: rgba(24, 35, 26, 0.16);
  --surface: #f4f8f1; --accent: #2f523b;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --display: "Iowan Old Style", "Palatino Linotype", Palatino, "Songti SC", "STSong", "SimSun", serif;
  --size: 17px; --leading: 1.68;
  --frame: 66rem; --frame-pad: 1.6rem 1.4rem 3.5rem; --rule-left: 0; --rule-width: 2px; --rule-color: transparent;
  --radius: 2px;
}
html[data-look="index"][data-theme="dark"] {
  --bg: #121814; --ink: #e6eee4; --muted: #adbcab; --line: rgba(230, 238, 228, 0.17);
  --surface: #1a211b; --accent: #a8cdb6;
}
html[data-look="index"] .top { border-bottom: 1px solid var(--line); margin-bottom: 1.2rem; }
html[data-look="index"] .mast { align-items: center; }
html[data-look="index"] .site-name { font-size: 1.16rem; }
html[data-look="index"] .chips { gap: 0.15rem 1.4rem; }
html[data-look="index"] .chips a[aria-current="true"] { box-shadow: inset 0 -2px 0 var(--accent); }
html[data-look="index"] .entry a { display: grid; grid-template-columns: 6.2rem minmax(0, 1fr); column-gap: 1.2rem; row-gap: 0.25rem; align-items: baseline; padding: 0.85rem 0.4rem 0.9rem; border-top: 1px solid var(--line); }
html[data-look="index"] .entry:first-child a { border-top: 0; }
html[data-look="index"] .entry a:hover { background: rgba(47, 82, 59, 0.06); }
html[data-look="index"][data-theme="dark"] .entry a:hover { background: rgba(168, 205, 182, 0.08); }
html[data-look="index"] .entry time { grid-column: 1; grid-row: 1; }
html[data-look="index"] .entry h1, html[data-look="index"] .entry h3 { grid-column: 2; grid-row: 1; margin: 0; font-size: 1.18rem; }
html[data-look="index"] .entry p { grid-column: 2; grid-row: 2; margin: 0; font-size: 0.94rem; max-width: 52ch; }
html[data-look="index"] .is-latest h1 { font-size: clamp(1.5rem, 3vw, 1.95rem); }
html[data-look="index"] .is-latest p { max-width: 58ch; }
html[data-look="index"] .essay,
html[data-look="index"] .foot { max-width: 42rem; }
html[data-look="index"] .prose { max-width: 36rem; }
html[data-look="index"] .prose p, html[data-look="index"] .prose li { line-height: 1.85; }

/* ---------- look: 散页 ---------- */
html[data-look="pages"] {
  --bg: #cdc4b6; --ink: #241c16; --muted: #5d5347; --line: rgba(36, 28, 22, 0.16);
  --surface: #fffdf7; --code: rgba(36, 28, 22, 0.05); --accent: #1f4f7e;
  --font-body: "LXGW WenKai", "Kaiti SC", "STKaiti", "KaiTi", "楷体", serif;
  --size: 17.5px; --leading: 1.72;
  --frame: 46rem; --frame-pad: 1.4rem 1rem 3.4rem; --rule-left: 0; --rule-width: 3px; --rule-color: transparent;
  --radius: 2px;
}
html[data-look="pages"][data-theme="dark"] {
  --bg: #2a251f; --ink: #f2ece2; --muted: #c2b7a7; --line: rgba(242, 236, 226, 0.18);
  --surface: #1e1a16; --code: rgba(242, 236, 226, 0.06); --accent: #9bc3e8;
}
html[data-look="pages"] .top { background: var(--bg); }
html[data-look="pages"] .chips a { background: var(--surface); padding: 0.24rem 0.68rem; box-shadow: 0 1px 0 rgba(36, 28, 22, 0.14); border-radius: 2px; }
html[data-look="pages"] .chips a[aria-current="true"] { box-shadow: inset 0 -2px 0 var(--accent), 0 1px 0 rgba(36, 28, 22, 0.14); }
html[data-look="pages"] .entry { background: var(--surface); margin-bottom: 0.65rem; border-radius: 2px; box-shadow: 0 1px 0 rgba(36, 28, 22, 0.14); }
html[data-look="pages"] .entry a { padding: 1rem 1.1rem 1.05rem; }
html[data-look="pages"] .entry time { display: block; }
html[data-look="pages"] .entry h3 { font-size: 1.2rem; margin-top: 0.15rem; }
html[data-look="pages"] .entry p { margin-top: 0.3rem; font-size: 0.94rem; }
html[data-look="pages"] .is-latest { box-shadow: inset 3px 0 0 var(--accent), 0 12px 24px rgba(36, 28, 22, 0.12); }
html[data-look="pages"] .is-latest h1 { font-size: clamp(1.6rem, 4vw, 2rem); }
html[data-look="pages"] .essay { background: var(--surface); padding: 1.2rem 1.15rem 1.5rem; border-radius: 2px; box-shadow: 0 12px 24px rgba(36, 28, 22, 0.12); }
html[data-look="pages"] .toc { background: transparent; }
html[data-look="pages"] .pager a { background: transparent; }
html[data-look="pages"] .prose { max-width: 34rem; }
html[data-look="pages"] .foot { border-top-color: rgba(36, 28, 22, 0.2); }

@media (min-width: 1080px) {
  html[data-look="sheet"] .frame { padding-right: 1.5rem; }
  html[data-look="index"] .frame { padding-left: 2rem; padding-right: 2rem; }
}
@media (max-width: 640px) {
  :root { --size: 17px; }
  html[data-look="sheet"] { --frame-pad: 1.5rem 0.95rem 3rem 1.5rem; --rule-left: 0.55rem; }
  html[data-look="index"] { --frame-pad: 1.1rem 0.95rem 3rem; }
  html[data-look="pages"] { --frame-pad: 1.1rem 0.8rem 3rem; }
  .mast { align-items: flex-start; }
  .toolbar { width: 100%; }
  .seg button { padding: 0.16rem 0.52rem; font-size: 0.72rem; }
  .chips { gap: 0.15rem 0.8rem; }
  html[data-look="index"] .entry a { grid-template-columns: 1fr; }
  html[data-look="index"] .entry time,
  html[data-look="index"] .entry h1,
  html[data-look="index"] .entry h3,
  html[data-look="index"] .entry p { grid-column: 1; grid-row: auto; }
  .pager { grid-template-columns: 1fr; }
  .pager-next { grid-column: 1; text-align: left; }
  .shelf.is-empty > h2 { font-size: 1.5rem; }
  .shelf.is-empty { padding-bottom: 2rem; }
  .to-top { right: 0.7rem; bottom: 0.7rem; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .to-top { transition: none; }
}