/* 天衍阅读站 —— 视觉规范来自 Claude Design「天衍阅读站」稿件 */

:root {
  --bg: #eef3f6;
  --bg2: #ffffff;
  --paper: #ffffff;
  --panel: rgba(255, 255, 255, .66);
  --line: rgba(53, 99, 127, .15);
  --fg: #1f2830;
  --dim: #5e6f7c;
  --faint: #93a3ad;
  --jade: #35637f;
  --tech: #a8453a;
  --jin: #b99553;
  --glow: rgba(150, 192, 218, .42);
  --shadow: 0 30px 70px -40px rgba(30, 62, 84, .5);
  --veil: rgba(255, 255, 255, .95);
  --veil0: rgba(255, 255, 255, 0);

  --read-fs: 19px;
  --read-lh: 2.05;

  --serif: "Noto Serif SC", "Songti SC", "Source Han Serif SC", "SimSun", serif;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, monospace;
}

:root[data-theme="night"] {
  --bg: #0d1319;
  --bg2: #131b22;
  --paper: #131b22;
  --panel: rgba(255, 255, 255, .04);
  --line: rgba(160, 200, 220, .14);
  --fg: #dfe7ec;
  --dim: #93a4b0;
  --faint: #64767f;
  --jade: #8ec4de;
  --tech: #d98878;
  --jin: #cfae6e;
  --glow: rgba(120, 170, 200, .2);
  --shadow: 0 30px 70px -40px rgba(0, 0, 0, .8);
  --veil: rgba(140, 180, 205, .1);
  --veil0: rgba(140, 180, 205, 0);
}

* { box-sizing: border-box; }
html { scroll-behavior: auto; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--jade); text-decoration: none; }
a:hover { color: var(--tech); }
::selection { background: var(--glow); }

@keyframes fadeUp { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
@keyframes drift { 0% { transform: translate3d(0, 0, 0) scale(1); } 100% { transform: translate3d(-40px, -18px, 0) scale(1.08); } }
@keyframes rise { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; }
}

/* ---------- 骨架 ---------- */

.shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  /* 首屏光晕故意超出视口，用 clip 收边；clip 不建立滚动容器，顶栏 sticky 仍然有效 */
  overflow-x: clip;
  background:
    radial-gradient(90% 46% at 8% 30%, rgba(226, 197, 140, .22) 0%, transparent 62%),
    radial-gradient(120% 70% at 62% -12%, var(--glow) 0%, transparent 62%),
    linear-gradient(180deg, color-mix(in srgb, var(--bg) 88%, #ffffff) 0%, var(--bg) 46%, color-mix(in srgb, var(--bg) 70%, #ffffff) 100%);
}

.main {
  flex: 1 1 auto;
  max-width: 1120px;
  width: 100%;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- 顶栏 ---------- */

.hdr {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--line);
}

.hdr-in {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
  height: 60px;
  display: flex;
  align-items: center;
  gap: 22px;
}

.brand { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.brand-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--jade); box-shadow: 0 0 12px var(--jade); }
.brand-name { font-family: var(--serif); font-weight: 700; font-size: 16px; letter-spacing: .14em; color: var(--fg); }

.nav { display: flex; gap: 4px; flex: 1 1 auto; overflow-x: auto; scrollbar-width: none; }
.nav::-webkit-scrollbar { display: none; }
.nav a {
  padding: 7px 13px;
  border-radius: 8px;
  font-size: 13px;
  white-space: nowrap;
  color: var(--dim);
  background: transparent;
}
.nav a.on { color: var(--fg); background: var(--panel); }

.pill-ghost {
  flex: 0 0 auto;
  background: none;
  border: 1px solid var(--line);
  color: var(--dim);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 12px;
  letter-spacing: .08em;
  cursor: pointer;
  font-family: inherit;
  white-space: nowrap;
}
.pill-ghost:hover { color: var(--fg); border-color: var(--jade); }

.setbar { border-top: 1px solid var(--line); background: var(--bg2); }
.setbar[hidden] { display: none; }
.setbar-in {
  max-width: 1120px;
  margin: 0 auto;
  padding: 16px 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  align-items: center;
}
.set-grp { display: flex; align-items: center; gap: 10px; }
.set-k { font-size: 12px; color: var(--faint); letter-spacing: .1em; }
.set-v { font-size: 13px; color: var(--dim); min-width: 38px; text-align: center; }
.set-hint { font-size: 12px; color: var(--faint); }

.sq {
  width: 30px; height: 30px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: none;
  color: var(--fg);
  cursor: pointer;
  font-family: inherit;
}
.lh {
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 12px;
  cursor: pointer;
  font-family: inherit;
  border: 1px solid var(--line);
  background: none;
  color: var(--dim);
}
.lh.on { border-color: var(--jade); color: var(--jade); }

/* ---------- 首页 ---------- */

.hero { position: relative; padding: 96px 0 48px; animation: rise .7s ease both; }
.hero-blobs { position: absolute; inset: -140px -50vw 0; overflow: hidden; pointer-events: none; z-index: 0; }
.hero-blobs i {
  position: absolute;
  display: block;
  border-radius: 50%;
}
.hero-blobs i:nth-child(1) {
  left: 6%; top: 8%; width: 52vw; height: 34vw;
  background: radial-gradient(closest-side, var(--veil), var(--veil0));
  filter: blur(6px);
  animation: drift 34s ease-in-out infinite alternate;
}
.hero-blobs i:nth-child(2) {
  right: 2%; top: 0; width: 46vw; height: 30vw;
  background: radial-gradient(closest-side, var(--glow), var(--veil0));
  filter: blur(10px);
  animation: drift 46s ease-in-out infinite alternate-reverse;
}
.hero-blobs i:nth-child(3) {
  left: 28%; top: 44%; width: 64vw; height: 22vw;
  background: radial-gradient(closest-side, color-mix(in srgb, var(--veil) 84%, transparent), var(--veil0));
  filter: blur(14px);
  animation: drift 58s ease-in-out infinite alternate;
}
.hero-in { position: relative; z-index: 1; }

.eyebrow { display: flex; align-items: center; gap: 14px; margin-bottom: 26px; }
.eyebrow span:first-child { width: 34px; height: 1px; background: var(--jin); }
.eyebrow span:last-child { font-size: 11px; letter-spacing: .4em; color: var(--jin); }

.hero h1 {
  font-family: var(--serif);
  font-size: clamp(38px, 6vw, 72px);
  line-height: 1.18;
  margin: 0 0 22px;
  font-weight: 400;
  letter-spacing: .06em;
  text-wrap: pretty;
}
.hero p.lede {
  max-width: 620px;
  margin: 0 0 38px;
  color: var(--dim);
  font-size: 16px;
  line-height: 2.1;
  text-wrap: pretty;
}

.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 56px; }
.cta a { padding: 13px 26px; border-radius: 999px; font-size: 14px; letter-spacing: .06em; }
.cta .solid { background: var(--jade); color: var(--bg); font-weight: 500; }
.cta .solid:hover { color: var(--bg); opacity: .88; }
.cta .ghost { border: 1px solid var(--line); color: var(--fg); }
.cta .ghost:hover { border-color: var(--jade); }
.cta .ghost.accent { color: var(--tech); }

.stats {
  display: grid;
  /* 固定 4 列 / 窄屏 2 列：auto-fit 换行时会在末尾留出空格子，1px 缝隙的底色会露成灰块 */
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 64px;
  box-shadow: var(--shadow);
}
.stats div { background: var(--paper); padding: 24px 22px; }
.stats b { font-family: var(--serif); font-size: 30px; color: var(--fg); line-height: 1; font-weight: 400; display: block; }
.stats span { font-size: 12px; color: var(--faint); letter-spacing: .16em; margin-top: 10px; display: block; }

.sec { padding-bottom: 64px; }
.sec-wide { padding-bottom: 80px; }
.sec-last { padding-bottom: 90px; }
.sec h2 {
  font-family: var(--serif);
  font-size: 20px;
  margin: 0 0 20px;
  font-weight: 500;
  letter-spacing: .08em;
}
.sec h2.tight { margin-bottom: 8px; }
.sec p.note { margin: 0 0 20px; font-size: 13px; color: var(--faint); }

.lines { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.line-card { border: 1px solid var(--line); border-radius: 14px; padding: 26px; background: var(--panel); }
.line-head { display: flex; align-items: center; gap: 9px; margin-bottom: 14px; }
.line-head i { width: 7px; height: 7px; border-radius: 50%; display: block; }
.line-head span { font-size: 13px; letter-spacing: .16em; }
.line-card p { margin: 0 0 18px; color: var(--dim); font-size: 14px; line-height: 1.95; }
.line-card a { font-size: 13px; }
.orig .line-head i { background: var(--jade); }
.orig .line-head span { color: var(--jade); }
.fan .line-head i { background: var(--tech); box-shadow: 0 0 10px var(--tech); }
.fan .line-head span, .fan a { color: var(--tech); }
.lines-foot { margin: 18px 0 0; font-size: 13px; color: var(--faint); line-height: 1.9; }

.doc-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; }
.doc-grid.lg { grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 14px; }
.doc-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px;
  background: var(--panel);
  display: block;
}
.doc-grid.lg .doc-card { padding: 22px; }
.doc-card:hover { border-color: var(--jade); }
.doc-card b { font-family: var(--serif); font-size: 16px; color: var(--fg); margin-bottom: 7px; display: block; font-weight: 400; }
.doc-grid.lg .doc-card b { font-size: 17px; margin-bottom: 8px; }
.doc-card span { font-size: 12px; color: var(--faint); line-height: 1.8; display: block; }

.art-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 14px; }
.slot {
  border: 1px dashed var(--line);
  border-radius: 12px;
  background-image: repeating-linear-gradient(135deg, var(--panel) 0 10px, transparent 10px 20px);
  display: flex;
  align-items: flex-end;
  padding: 16px;
}
.art-grid .slot { aspect-ratio: 3 / 4; }
.slot span { font-family: var(--mono); font-size: 11px; color: var(--faint); letter-spacing: .06em; }
.art-grid figure { margin: 0; }
.art-grid img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; border-radius: 12px; border: 1px solid var(--line); display: block; }
.art-grid figcaption { font-family: var(--mono); font-size: 11px; color: var(--faint); letter-spacing: .06em; padding-top: 8px; }

/* ---------- 目录 ---------- */

.page { padding: 44px 0 80px; }
.page h1 {
  font-family: var(--serif);
  font-size: 30px;
  margin: 0 0 6px;
  font-weight: 500;
  letter-spacing: .06em;
}
.page .sub { margin: 0 0 26px; color: var(--faint); font-size: 13px; }

.toc-pages { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 26px; }
.toc-pages button {
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 12px;
  cursor: pointer;
  font-family: inherit;
  letter-spacing: .06em;
  border: 1px solid var(--line);
  background: none;
  color: var(--dim);
}
.toc-pages button.on { border-color: var(--jade); color: var(--jade); }

.toc-list { border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.toc-list a {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
}
.toc-list a:last-child { border-bottom: none; }
.toc-list a:nth-child(even) { background: var(--panel); }
.toc-list a:hover { background: var(--glow); }
.toc-num { font-family: var(--mono); font-size: 12px; color: var(--faint); min-width: 46px; }
.toc-title { font-family: var(--serif); font-size: 15px; color: var(--fg); flex: 1 1 auto; }

.tag {
  font-size: 11px;
  letter-spacing: .12em;
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--faint);
  white-space: nowrap;
}
.tag.fan { border-color: var(--tech); color: var(--tech); }

/* ---------- 阅读 ---------- */

.reader { padding: 40px 0 100px; max-width: 800px; margin: 0 auto; }
.reader-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-bottom: 30px; }

.pill {
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: .08em;
  border: 1px solid var(--line);
  color: var(--dim);
  background: transparent;
  cursor: pointer;
  font-family: inherit;
}
.pill.jade.on { border-color: var(--jade); background: var(--jade); color: var(--bg); }
.pill.tech.on { border-color: var(--tech); background: var(--tech); color: var(--bg); }
.pill.dead {
  border: 1px dashed var(--line);
  color: var(--faint);
  opacity: .5;
  pointer-events: none;
  background: none;
}

.notice {
  border-left: 2px solid var(--tech);
  padding: 10px 16px;
  margin-bottom: 26px;
  font-size: 12px;
  color: var(--dim);
  line-height: 1.8;
  background: var(--panel);
}

.sheet {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: clamp(26px, 5vw, 60px);
  box-shadow: var(--shadow);
}
.sheet .kicker { font-family: var(--mono); font-size: 12px; color: var(--faint); letter-spacing: .18em; margin-bottom: 14px; }
.sheet h1 {
  font-family: var(--serif);
  font-size: clamp(26px, 4vw, 38px);
  line-height: 1.4;
  margin: 0 0 16px;
  font-weight: 400;
  letter-spacing: .04em;
  text-wrap: pretty;
}
.rule { height: 1px; background: linear-gradient(90deg, var(--jin), transparent); margin-bottom: 40px; }

.body {
  font-family: var(--serif);
  font-size: var(--read-fs);
  line-height: var(--read-lh);
  color: var(--fg);
  letter-spacing: .01em;
}
.body p { margin: 0 0 1.1em; }

.cmp {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 34px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: clamp(22px, 4vw, 44px);
  box-shadow: var(--shadow);
}
.cmp .col-k { font-size: 12px; letter-spacing: .16em; margin-bottom: 10px; }
.cmp .col-k.jade { color: var(--jade); }
.cmp .col-k.tech { color: var(--tech); }
.cmp h2 { font-family: var(--serif); font-size: 20px; line-height: 1.5; margin: 0 0 22px; font-weight: 500; }
.cmp .body { font-size: max(15px, calc(var(--read-fs) - 3px)); }
.cmp .body p { margin: 0 0 1.05em; }

.pager { display: flex; gap: 12px; margin-top: 56px; padding-top: 26px; border-top: 1px solid var(--line); }
.pager a {
  padding: 12px 20px;
  border-radius: 10px;
  border: 1px solid var(--line);
  font-size: 13px;
  color: var(--fg);
}
.pager a.mid { color: var(--dim); }
.pager a.off { color: var(--faint); opacity: .4; pointer-events: none; }
.pager a.prev { margin-right: auto; }
.pager a.next { margin-left: auto; }

/* ---------- 搜索 ---------- */

.narrow { max-width: 760px; }
.narrow-sm { max-width: 680px; }

.q {
  width: 100%;
  padding: 15px 18px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--bg2);
  color: var(--fg);
  font-size: 15px;
  font-family: inherit;
  outline: none;
}
.q:focus { border-color: var(--jade); }
.q-bar { display: flex; align-items: center; gap: 14px; margin: 16px 0 30px; }
.q-bar button {
  padding: 10px 20px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: none;
  color: var(--tech);
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
}
.q-bar span { font-size: 12px; color: var(--faint); }

.results { display: flex; flex-direction: column; gap: 2px; }
.results a { display: block; padding: 18px 0; border-bottom: 1px solid var(--line); }
.res-head { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; flex-wrap: wrap; }
.res-num { font-family: var(--mono); font-size: 12px; color: var(--faint); }
.res-title { font-family: var(--serif); font-size: 16px; color: var(--fg); }
.res-snip { font-size: 13px; color: var(--dim); line-height: 1.9; }
.res-snip mark { background: var(--glow); color: var(--fg); padding: 1px 2px; }

/* ---------- 资料 ---------- */

.back { font-size: 12px; color: var(--faint); letter-spacing: .1em; }
.doc-hero { height: 150px; margin: 20px 0 30px; padding: 14px; }
.doc-hero img { width: 100%; height: 150px; object-fit: cover; border-radius: 12px; border: 1px solid var(--line); display: block; }

.md h1, .md h2, .md h3, .md h4 {
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--fg);
}
.md h1 { font-size: 30px; margin: 0 0 16px; }
.md h2 { font-size: 22px; margin: 44px 0 16px; }
.md h3 { font-size: 17px; margin: 44px 0 16px; }
.md h4 { font-size: 15px; margin: 44px 0 16px; }
.md p { margin: 0 0 18px; color: var(--dim); font-size: 15px; line-height: 2.05; text-wrap: pretty; }
.md ul { margin: 0 0 22px; padding-left: 20px; color: var(--dim); font-size: 14px; line-height: 2; }
.md ol { margin: 0 0 22px; padding-left: 22px; color: var(--dim); font-size: 14px; line-height: 2; }
.md li { margin: 0 0 6px; }
.md hr { height: 1px; background: var(--line); border: 0; margin: 34px 0; }
.md code { font-family: var(--mono); font-size: .9em; background: var(--panel); padding: 1px 5px; border-radius: 4px; }
.md strong { color: var(--fg); }
.md .tbl { overflow-x: auto; margin: 0 0 26px; }
.md table { width: 100%; border-collapse: collapse; font-size: 13px; }
.md th {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  color: var(--faint);
  font-weight: 500;
  letter-spacing: .08em;
}
.md td { padding: 10px 12px; border-bottom: 1px solid var(--line); color: var(--dim); }
.md .xref { color: var(--jade); }

/* ---------- 声明 ---------- */

.about { color: var(--dim); font-size: 15px; line-height: 2.1; }
.about p { margin: 0 0 20px; }
.about p:last-child { margin: 0; color: var(--faint); font-size: 13px; }

/* ---------- 页脚 ---------- */

.fillu { position: relative; margin-top: auto; height: clamp(200px, 26vw, 340px); overflow: hidden; }
.fillu .wash {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 0%, color-mix(in srgb, var(--bg) 60%, #ffffff) 46%, color-mix(in srgb, var(--bg) 30%, #ffffff) 100%);
}
:root[data-theme="night"] .fillu .wash {
  background: linear-gradient(180deg, transparent 0%, color-mix(in srgb, var(--bg) 88%, #ffffff) 46%, color-mix(in srgb, var(--bg) 76%, #ffffff) 100%);
}
.fillu i { position: absolute; display: block; border-radius: 50%; }
.fillu i:nth-of-type(1) {
  left: -12%; bottom: -46%; width: 70%; height: 120%;
  background: radial-gradient(closest-side, var(--veil), var(--veil0));
  filter: blur(8px);
  animation: drift 52s ease-in-out infinite alternate;
}
.fillu i:nth-of-type(2) {
  right: -14%; bottom: -52%; width: 76%; height: 130%;
  background: radial-gradient(closest-side, var(--glow), var(--veil0));
  filter: blur(12px);
  animation: drift 64s ease-in-out infinite alternate-reverse;
}
.fillu i:nth-of-type(3) {
  left: 22%; bottom: -30%; width: 56%; height: 80%;
  background: radial-gradient(closest-side, rgba(226, 197, 140, .3), var(--veil0));
  filter: blur(16px);
  animation: drift 78s ease-in-out infinite alternate;
}
.fillu-in {
  position: relative;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.fillu-slot {
  width: 100%;
  max-width: 820px;
  aspect-ratio: 16 / 5;
  border: 1px dashed var(--line);
  border-radius: 14px;
  display: flex;
  align-items: flex-end;
  padding: 16px;
  background: rgba(255, 255, 255, .28);
}
:root[data-theme="night"] .fillu-slot { background: rgba(255, 255, 255, .03); }
.fillu-slot span { font-family: var(--mono); font-size: 11px; color: var(--faint); letter-spacing: .06em; }
.fillu-in img { width: 100%; max-width: 820px; aspect-ratio: 16 / 5; object-fit: cover; border-radius: 14px; display: block; }

.ftr { border-top: 1px solid var(--line); }
.ftr-in {
  max-width: 1120px;
  margin: 0 auto;
  padding: 26px 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
  align-items: center;
}
.ftr-in span, .ftr-in a { font-size: 12px; color: var(--faint); letter-spacing: .1em; }

/* ---------- 杂项 ---------- */

.loading { padding: 90px 0; color: var(--faint); font-size: 13px; letter-spacing: .1em; }
.view { animation: fadeUp .4s ease both; }

@media (max-width: 760px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .hdr-in { gap: 12px; }
  .hero { padding: 64px 0 36px; }
  .reader { padding: 28px 0 70px; }
  .pager { flex-wrap: wrap; }
  .setbar-in { gap: 18px; }
}

@media (max-width: 420px) {
  .brand-name { display: none; }
  .hdr-in { gap: 10px; padding: 0 14px; }
  .main { padding: 0 14px; }
  .pill-ghost { padding: 6px 10px; }
}