/* V14 Answer：首页与 CV 页共用 */
:root {
  --bg: #fbfbfa; --card: #fff; --soft: #f3f3f1; --ink: #1b1b1a; --ink2: #44443f; --muted: #7a7a73; --line: #e6e5e1; --acc: #20808d; --acc-soft: #e5f3f4;
  --sans: "Inter", system-ui, -apple-system, sans-serif; --serif: "Newsreader", Georgia, serif; --mono: "JetBrains Mono", ui-monospace, monospace;
  --pm-bg: var(--soft); --pm-ph-bg: var(--soft); --pm-ph-ink: var(--muted);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 70px; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.7 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: var(--acc); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--acc); outline-offset: 2px; }
.col { max-width: 820px; margin: 0 auto; padding: 0 24px; }

.top { display: flex; align-items: center; justify-content: space-between; padding: 18px 0; }
.top .nm { font: 600 15px var(--sans); color: var(--ink); display: flex; align-items: center; gap: 10px; }
.top .nm:hover { text-decoration: none; }
.top .nm i { width: 24px; height: 24px; border-radius: 50%; background: #fff center 20% / cover; border: 1px solid var(--line); }
.top nav { display: flex; gap: 4px; }
.top nav a { color: var(--ink2); font-size: 14px; padding: 6px 12px; border-radius: 999px; }
.top nav a:hover, .top nav a[aria-current] { background: var(--soft); text-decoration: none; }

.q { margin: 36px 0 24px; font: 500 clamp(26px, 3.6vw, 34px)/1.25 var(--serif); letter-spacing: -.01em; min-height: 1.3em; }
.q .cur { display: inline-block; width: 2px; height: .9em; background: var(--acc); vertical-align: -0.08em; margin-left: 3px; animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.lbl { display: flex; align-items: center; gap: 8px; font: 600 13px var(--sans); color: var(--ink2); margin: 26px 0 10px; }
.lbl i { color: var(--acc); }

.sources { display: grid; grid-auto-flow: column; grid-auto-columns: 168px; gap: 10px; overflow-x: auto; padding-bottom: 6px; scrollbar-width: thin; }
.src { background: var(--card); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; color: var(--ink); font-size: 12.5px; line-height: 1.35; opacity: 0; transform: translateY(6px); transition: opacity .4s, transform .4s, border-color .2s; transition-delay: calc(var(--k) * 70ms); }
.ready .src { opacity: 1; transform: none; }
.src:hover { border-color: var(--acc); text-decoration: none; }
.src .pm { aspect-ratio: 16 / 9; }
.src div.t { padding: 7px 9px 9px; }
.src b { display: block; font-weight: 600; }
.src span { color: var(--muted); font: 11px var(--mono); }
.src sup { font: 600 10px var(--mono); color: var(--acc); margin-right: 4px; }

.ans > * { opacity: 0; transform: translateY(6px); transition: opacity .5s ease, transform .5s ease; }
.ans > .on { opacity: 1; transform: none; }
.ans p { margin: 0 0 14px; font-size: 16.5px; }
.ans h3 { font: 600 18px var(--sans); margin: 28px 0 10px; }
.ans blockquote { margin: 0 0 16px; padding: 4px 0 4px 16px; border-left: 3px solid var(--acc); font: italic 400 19px/1.5 var(--serif); color: var(--ink2); }
.ans ul { margin: 0 0 14px; padding-left: 20px; }
.ans li { margin-bottom: 4px; }
.ans li time { font: 13px var(--mono); color: var(--muted); margin-right: 8px; }
.cite { display: inline-grid; place-items: center; min-width: 18px; height: 18px; padding: 0 4px; margin: 0 1px; border-radius: 9px; background: var(--soft); color: var(--ink2); font: 600 10.5px var(--mono); vertical-align: 2px; cursor: pointer; }
.cite:hover { background: var(--acc); color: #fff; text-decoration: none; }
.pop { position: absolute; z-index: 30; width: 260px; background: var(--card); border: 1px solid var(--line); border-radius: 10px; box-shadow: 0 14px 34px -16px rgba(0,0,0,.35); overflow: hidden; pointer-events: none; opacity: 0; transform: translateY(4px); transition: opacity .15s, transform .15s; font-size: 13px; }
.pop.on { opacity: 1; transform: none; }
.pop .pm { aspect-ratio: 16 / 9; }
.pop div.t { padding: 8px 10px; }
.pop b { display: block; }
.pop span { font: 11.5px var(--mono); color: var(--muted); }

.tabs { position: relative; display: flex; flex-wrap: wrap; gap: 6px; margin: 4px 0 14px; }
.tabs button { border: 1px solid var(--line); background: var(--card); border-radius: 999px; padding: 4px 12px; font: 500 13px var(--sans); color: var(--ink2); cursor: pointer; }
.tabs button[aria-selected="true"] { background: var(--acc-soft); border-color: var(--acc); color: var(--acc); }
.tabs button sup { font: 10px var(--mono); margin-left: 2px; opacity: .7; }
.tab-ind { display: none; }
.works { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.w { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 12px; background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 10px; animation: in .35s ease both; animation-delay: calc(var(--i) * 40ms); }
@keyframes in { from { opacity: 0; } }
.w .pm { aspect-ratio: 4 / 3; border-radius: 6px; }
.w b.t { display: block; font-size: 15px; }
.w .v { font: 11.5px var(--mono); color: var(--acc); }
.w p { margin: 2px 0 4px; font-size: 13.5px; color: var(--ink2); line-height: 1.45; }
.w .ln { font: 12px var(--mono); display: flex; gap: 10px; }
.w .au { font-size: 12px; color: var(--muted); line-height: 1.4; }
.w .au .me, .ans .me { color: var(--ink); font-weight: 600; }
.contacts { display: flex; flex-wrap: wrap; gap: 6px; margin: 4px 0 14px; }
.contacts a, .contacts button { display: inline-flex; gap: 7px; align-items: center; font: 500 13.5px var(--sans); padding: 6px 12px; border: 1px solid var(--line); border-radius: 999px; background: var(--card); color: var(--ink); }
.contacts a:hover, .contacts button:hover { border-color: var(--acc); color: var(--acc); text-decoration: none; }
.follow { border-top: 1px solid var(--line); margin-top: 30px; padding-top: 6px; }
.follow button, .follow a { display: flex; align-items: center; justify-content: space-between; width: 100%; border: 0; border-bottom: 1px solid var(--line); background: none; padding: 11px 2px; font: 15px var(--sans); color: var(--ink); cursor: pointer; text-align: left; }
.follow button:hover, .follow a:hover { color: var(--acc); text-decoration: none; }
.follow i { color: var(--muted); }
.meta { display: flex; gap: 14px; flex-wrap: wrap; font: 12px var(--mono); color: var(--muted); margin-top: 8px; }
footer { padding: 36px 0 52px; font-size: 13px; color: var(--muted); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
table.cv { width: 100%; border-collapse: collapse; font-size: 15px; margin-bottom: 8px; }
table.cv td { padding: 7px 10px 7px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
table.cv td:first-child { font: 13px var(--mono); color: var(--muted); white-space: nowrap; width: 150px; }
table.cv small { display: block; color: var(--muted); font-size: 13.5px; }

@media (max-width: 640px) { .col { padding: 0 16px; } .works { grid-template-columns: 1fr; } table.cv td:first-child { white-space: normal; width: 100px; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .ans > *, .src { opacity: 1; transform: none; transition: none; } .w { animation: none; } .q .cur { animation: none; } }