:root {
  --paper: #F5F6F3;
  --card: #FFFFFF;
  --ink: #1F3A44;
  --ink-soft: #5C6B70;
  --faint: #9AA4A1;
  --line: #E3E1DA;
  --slide: #FAF9F6;
  --blue: #2456E6;
  --blue-bg: #EFF3FE;
  --red: #D14B41;
  --red-bg: #FBEFED;
  --green: #0E7C52;
  --green-bg: #E9F4EE;
  --amber: #B25E09;
  --serif: "Source Han Serif SC", "Noto Serif SC", "STZhongsong", "SimSun", serif;
  --sans: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  --mono: "Cascadia Code", "Consolas", "Courier New", monospace;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { background: var(--paper); color: var(--ink); font-family: var(--sans); font-size: 14px; line-height: 1.7; padding-bottom: 60px; }
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; border-radius: 4px; }

.topbar { max-width: 1180px; margin: 0 auto; padding: 22px 8px 14px; display: flex; align-items: center; gap: 18px; }
.brand { font-family: var(--serif); font-size: 19px; letter-spacing: 2px; font-weight: 700; }
.brand small { display: block; font-family: var(--sans); font-size: 10px; letter-spacing: 3px; color: var(--faint); font-weight: 400; margin-top: 1px; }
.nav { display: flex; gap: 4px; margin-left: 10px; }
.nav a { font-size: 13px; color: var(--ink-soft); padding: 6px 12px; border-radius: 999px; }
.nav a:hover { background: #ECEDE8; color: var(--ink); }
.nav a.on { background: var(--ink); color: #fff; }
.search { flex: 1; max-width: 380px; margin-left: auto; display: flex; align-items: center; gap: 8px; background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 7px 16px; color: var(--faint); font-size: 13px; }
.search input { flex: 1; border: 0; outline: 0; background: transparent; font: inherit; color: var(--ink); }
.search .kbd { font-family: var(--mono); font-size: 11px; border: 1px solid var(--line); border-radius: 5px; padding: 0 6px; background: var(--slide); }
.add { font-family: var(--sans); font-size: 12px; padding: 7px 14px; border-radius: 999px; border: 1px solid var(--ink); background: var(--ink); color: #fff; cursor: pointer; white-space: nowrap; transition: background .12s; }
.add:hover { background: #2A4C58; }

.hero { max-width: 1180px; margin: 6px auto 4px; padding: 30px 8px 8px; }
.hero h1 { font-family: var(--serif); font-size: 34px; font-weight: 700; letter-spacing: 1px; margin-bottom: 10px; }
.hero h1 em { font-style: normal; color: var(--blue); }
.hero p { color: var(--ink-soft); max-width: 640px; }

.filters { max-width: 1180px; margin: 18px auto 0; padding: 0 8px; display: flex; flex-wrap: wrap; gap: 8px; }
.pill { font-family: var(--sans); font-size: 12.5px; padding: 6px 15px; border-radius: 999px; border: 1px solid var(--line); background: var(--card); color: var(--ink-soft); cursor: pointer; transition: all .12s; }
.pill:hover { border-color: #B9C6C3; color: var(--ink); }
.pill.on { background: var(--ink); color: #fff; border-color: var(--ink); }
.pill i { font-style: normal; font-family: var(--mono); font-size: 11px; opacity: .65; margin-left: 4px; }

.grid { max-width: 1180px; margin: 18px auto 0; padding: 0 8px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.tcard { background: var(--card); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; display: block; transition: border-color .12s, transform .12s, box-shadow .12s; position: relative; }
.tcard:hover { border-color: #B9C6C3; transform: translateY(-2px); box-shadow: 0 10px 24px rgba(31,58,68,.08); }
.tcard .im { height: 132px; background: #fff; border-bottom: 1px solid var(--line); display: flex; align-items: center; justify-content: center; padding: 10px; overflow: hidden; }
.tcard .im img { max-height: 100%; max-width: 100%; }
.tcard .im .ph { text-align: center; color: #C9CDD3; }
.tcard .im .ph b { display: block; font-family: var(--serif); font-size: 30px; letter-spacing: 2px; }
.tcard .im .ph span { font-size: 11px; letter-spacing: 2px; }
.tcard .tt { padding: 10px 14px 2px; font-size: 13px; font-weight: 600; color: var(--ink); display: flex; align-items: center; gap: 8px; }
.tcard .tt .st { flex: none; font-size: 10px; padding: 1px 8px; border-radius: 999px; border: 1px solid; font-weight: 400; }
.st.verified { color: var(--green); border-color: #BFE0CF; background: var(--green-bg); }
.st.sourced { color: var(--blue); border-color: #C6D4FA; background: #fff; }
.st.cataloged { color: var(--faint); border-color: var(--line); background: var(--slide); }
.tcard .tm { padding: 2px 14px 12px; font-size: 11.5px; color: var(--faint); font-family: var(--mono); }
.tcard .tm i { font-style: normal; font-family: var(--sans); }
.empty { grid-column: 1/-1; text-align: center; color: var(--faint); padding: 40px 0; }

.sheet { max-width: 1180px; margin: 14px auto 0; background: var(--card); border: 1px solid var(--line); border-radius: 18px; box-shadow: 0 20px 50px rgba(31,58,68,.07); overflow: hidden; }
.head { padding: 34px 44px 26px; border-bottom: 1px solid var(--line); }
.eyebrow { font-size: 11px; letter-spacing: 3px; color: var(--faint); margin-bottom: 12px; }
.eyebrow b { color: var(--ink-soft); font-weight: 600; }
h1.pg { font-family: var(--serif); font-size: 30px; font-weight: 700; letter-spacing: 1px; margin-bottom: 16px; }
h1.pg .thin { color: var(--faint); font-weight: 400; margin: 0 6px; }
.badges { display: flex; flex-wrap: wrap; gap: 8px; }
.badge { font-size: 12px; padding: 5px 12px; border-radius: 999px; border: 1px solid var(--line); background: var(--slide); color: var(--ink-soft); }
.badge.ok { background: var(--green-bg); border-color: #BFE0CF; color: var(--green); font-weight: 600; }
.badge.red { background: var(--red-bg); border-color: #EFC7C2; color: var(--red); font-weight: 600; }
.badge.blue { background: var(--blue-bg); border-color: #C6D4FA; color: var(--blue); }

.main { display: grid; grid-template-columns: 430px 1fr; }
.fig { padding: 26px 28px; border-right: 1px solid var(--line); }
.slide { background: #FFFFFF; border: 1px solid var(--line); border-radius: 10px; padding: 14px; box-shadow: 0 2px 10px rgba(31,58,68,.05); }
.slide img { width: 100%; display: block; border-radius: 4px; }
.slide .noph { aspect-ratio: 7/6; background: var(--slide); border: 1px dashed var(--line); border-radius: 6px; display: flex; flex-direction: column; align-items: center; justify-content: center; color: #C4C1B8; gap: 6px; }
.slide .noph b { font-family: var(--serif); font-size: 26px; letter-spacing: 3px; }
.figcap { font-size: 12px; color: var(--ink-soft); margin-top: 10px; display: flex; gap: 8px; align-items: baseline; }
.figcap .dot-ok { color: var(--green); font-weight: 700; }
.compare { margin-top: 16px; display: flex; gap: 12px; align-items: center; background: var(--slide); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; }
.compare img { width: 120px; border: 1px solid var(--line); border-radius: 6px; background: #fff; display: block; }
.compare .t { font-size: 12px; color: var(--ink-soft); line-height: 1.6; }
.compare .t b { display: block; color: var(--ink); font-size: 12.5px; }

.codebox { padding: 22px 30px 24px; min-width: 0; }
.legend { display: flex; gap: 18px; font-size: 12px; color: var(--ink-soft); margin-bottom: 12px; align-items: center; }
.legend .grow { flex: 1; }
.sw { display: inline-block; width: 18px; height: 4px; border-radius: 2px; margin-right: 6px; vertical-align: 2px; }
.sw.r { background: var(--red); } .sw.b { background: var(--blue); } .sw.n { background: #C9CDD3; }
.ghost { font-family: var(--sans); font-size: 12px; padding: 5px 14px; border-radius: 999px; border: 1px solid var(--line); background: var(--card); color: var(--ink-soft); cursor: pointer; transition: all .12s; }
.ghost:hover { border-color: #B9C6C3; color: var(--ink); }
.ghost.on { background: var(--ink); color: #fff; border-color: var(--ink); }
.ghost:disabled { opacity: .45; cursor: not-allowed; }
pre.code { font-family: var(--mono); font-size: 13px; line-height: 1.9; color: #2B3A40; overflow-x: auto; padding-bottom: 2px; }
.ln { display: flex; border-left: 3px solid transparent; padding: 0 12px 0 8px; border-radius: 4px; white-space: pre; transition: background .12s; }
.ln:hover { background: #F1EFE9; }
.ln .no { color: #C4C1B8; width: 28px; flex: none; text-align: right; margin-right: 16px; user-select: none; font-size: 11px; padding-top: 2px; }
.ln.red { border-left-color: var(--red); background: var(--red-bg); }
.ln.blue { border-left-color: var(--blue); background: var(--blue-bg); }
.ln.dim { color: #8A9290; }
.tag { font-family: var(--sans); font-size: 10.5px; border-radius: 999px; padding: 1px 9px; margin-left: 12px; vertical-align: 1px; border: 1px solid; }
.tag.r { color: var(--red); border-color: #EFC7C2; background: #fff; }
.tag.b { color: var(--blue); border-color: #C6D4FA; background: #fff; }
.fn { color: var(--blue); }
.str { color: var(--green); }
.num { color: var(--amber); }
.kw { color: var(--ink); font-weight: 700; }
.cm { color: #8A9290; font-style: italic; }
.nocode { background: var(--slide); border: 1px dashed var(--line); border-radius: 10px; padding: 34px 24px; text-align: center; color: var(--ink-soft); font-size: 13px; }
.nocode b { display: block; font-family: var(--serif); font-size: 16px; margin-bottom: 6px; color: var(--ink); }
.tips { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 8px; }
.tip { font-size: 12px; background: var(--slide); border: 1px solid var(--line); border-radius: 8px; padding: 6px 12px; color: var(--ink-soft); }
.tip b { color: var(--ink); font-family: var(--mono); font-weight: 600; }
.verify { margin-top: 14px; font-size: 12px; color: var(--faint); }
.verify summary { cursor: pointer; color: var(--ink-soft); }
.verify p { margin-top: 6px; font-family: var(--mono); font-size: 11.5px; }
.toast { position: fixed; left: 50%; bottom: 28px; transform: translate(-50%, 16px); background: var(--ink); color: #fff; font-size: 13px; padding: 9px 18px; border-radius: 999px; opacity: 0; pointer-events: none; transition: all .18s; z-index: 60; }
.toast.on { opacity: 1; transform: translate(-50%, 0); }
.lb { position: fixed; inset: 0; background: rgba(31,58,68,.72); display: none; align-items: center; justify-content: center; z-index: 50; cursor: zoom-out; padding: 24px; }
.lb.on { display: flex; }
.lb img { max-width: 92%; max-height: 92%; background: #fff; border-radius: 8px; box-shadow: 0 30px 80px rgba(0,0,0,.35); }

.steps { border-top: 1px solid var(--line); background: var(--slide); padding: 30px 44px 34px; }
.steps h2, .family h2 { font-family: var(--serif); font-size: 19px; letter-spacing: 1px; margin-bottom: 22px; }
.cols { display: grid; grid-template-columns: 1fr 300px; gap: 40px; align-items: start; }
.step { display: flex; gap: 18px; padding: 14px 0; border-bottom: 1px dashed var(--line); }
.step:last-child { border-bottom: 0; }
.step .n { font-family: var(--serif); font-size: 26px; color: #C9CDD3; font-weight: 700; line-height: 1.1; flex: none; width: 44px; }
.step p { font-size: 13.5px; }
.step b { color: var(--ink); }
code.k { font-family: var(--mono); font-size: 12px; background: #EDF0FA; color: #27408F; border-radius: 5px; padding: 1px 7px; }
table.sample { border-collapse: collapse; width: 100%; font-size: 12.5px; background: #fff; border-radius: 10px; overflow: hidden; border: 1px solid var(--line); }
table.sample th { background: #EFF0EB; padding: 8px 14px; text-align: left; font-weight: 600; font-family: var(--mono); font-size: 12px; }
table.sample td { padding: 7px 14px; border-top: 1px solid #EFEEE8; font-family: var(--mono); }
.tblcap { font-size: 11.5px; color: var(--faint); margin-top: 8px; }

.family { border-top: 1px solid var(--line); padding: 26px 44px 30px; }
.family .row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }

footer { border-top: 1px solid var(--line); background: var(--ink); color: #9DB3AE; padding: 16px 44px; font-size: 12px; display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
footer b { color: #fff; font-weight: 600; }
footer a { color: #DCE7E4; border-bottom: 1px dotted #9DB3AE; }

.prose { max-width: 860px; margin: 0 auto; padding: 34px 24px 50px; }
.prose h2 { font-family: var(--serif); font-size: 20px; margin: 34px 0 12px; padding-top: 18px; border-top: 1px solid var(--line); }
.prose h2:first-of-type { border-top: 0; margin-top: 0; padding-top: 0; }
.prose p, .prose li { color: var(--ink-soft); font-size: 13.5px; }
.prose ul { padding-left: 20px; margin: 8px 0; }
.prose li { margin: 4px 0; }
.prose code { font-family: var(--mono); font-size: 12px; background: #EDF0FA; color: #27408F; border-radius: 5px; padding: 1px 7px; }
.prose pre { font-family: var(--mono); font-size: 12px; background: #1F3A44; color: #DCE7E4; border-radius: 10px; padding: 16px 20px; overflow-x: auto; margin: 12px 0; line-height: 1.8; }
.prose table { border-collapse: collapse; width: 100%; font-size: 12.5px; margin: 12px 0; background: #fff; border: 1px solid var(--line); }
.prose th { background: #EFF0EB; padding: 8px 12px; text-align: left; }
.prose td { padding: 7px 12px; border-top: 1px solid #EFEEE8; font-family: var(--mono); font-size: 12px; }
.ai box-title {}
.ai-note { background: var(--blue-bg); border: 1px solid #C6D4FA; border-radius: 12px; padding: 16px 20px; margin: 12px 0; }
.ai-note b { color: var(--blue); }

@media (max-width: 980px) {
  .main, .cols { grid-template-columns: 1fr; }
  .fig { border-right: 0; border-bottom: 1px solid var(--line); }
  .grid { grid-template-columns: repeat(2, 1fr); }
  .family .row { grid-template-columns: repeat(2, 1fr); }
}
@media (prefers-reduced-motion: reduce) { .tcard, .ln, .pill { transition: none; } }