:root {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", Arial, sans-serif;
  --bg:#fbfcfd;
  --surface:#fff;
  --surface-soft:#f5f8fa;
  --surface-blue:#eef9fb;
  --ink:#071f49;
  --text:#536173;
  --muted:#8a95a3;
  --line:#e7ebef;
  --line-strong:#dce3e8;
  --cyan:#01dff2;
  --cyan-strong:#08aabd;
  --shadow:0 18px 55px rgba(17,37,63,.07);
  color-scheme:light;
  color:var(--ink);
  background:var(--bg);
}
html[data-theme="dark"] {
  --bg:#0f1318;
  --surface:#171c22;
  --surface-soft:#141a20;
  --surface-blue:#132229;
  --ink:#f2f6fb;
  --text:#b4bec9;
  --muted:#7f8a96;
  --line:#252d35;
  --line-strong:#303a44;
  --cyan:#01dff2;
  --cyan-strong:#4beaf5;
  --shadow:0 18px 55px rgba(0,0,0,.22);
  color-scheme:dark;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;background:var(--bg)}
body{margin:0;min-width:280px;background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
button{font:inherit}
.site-header{position:sticky;top:0;z-index:10;padding-top:env(safe-area-inset-top);border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--bg) 90%,transparent);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px)}
.nav-shell{width:min(920px,calc(100% - 40px));height:68px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:inline-flex;align-items:center;gap:9px;font-size:15px;font-weight:700;letter-spacing:-.02em;color:var(--ink)}
.brand-mark{width:28px;height:31px;display:grid;place-items:center}
.brand-mark img,.footer-mark{display:block;width:100%;height:100%;object-fit:contain;transition:filter .2s ease,opacity .2s ease}
html[data-theme="dark"] .brand-mark img,html[data-theme="dark"] .footer-mark{filter:brightness(0) invert(1)}
.nav-tools{display:flex;align-items:center;gap:8px}
.readonly{display:inline-flex;align-items:center;min-height:36px;padding:0 13px;border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--muted);font-size:12px;font-weight:600}
.readonly-short{display:none}
.theme-toggle{width:38px;height:38px;display:grid;place-items:center;border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--ink);cursor:pointer;transition:border-color .18s ease,background .18s ease,transform .18s ease}
.theme-toggle:hover{border-color:var(--line-strong);background:var(--surface-soft)}
.theme-toggle:active{transform:scale(.96)}
.theme-icon{grid-area:1/1;font-size:16px;line-height:1;transition:opacity .16s ease,transform .16s ease}
.theme-icon-dark{opacity:0;transform:scale(.75) rotate(-12deg)}
html[data-theme="dark"] .theme-icon-light{opacity:0;transform:scale(.75) rotate(12deg)}
html[data-theme="dark"] .theme-icon-dark{opacity:1;transform:none}
.page-shell{width:min(920px,calc(100% - 40px));margin:0 auto;padding:70px 0 max(52px,env(safe-area-inset-bottom))}
.share-header{max-width:820px;margin:0 auto 38px;text-align:left}
.kicker{margin:0 0 16px;color:var(--cyan-strong);font-size:12px;font-weight:760;letter-spacing:.14em}
h1{margin:0;max-width:840px;color:var(--ink);font-size:clamp(38px,5.3vw,58px);line-height:1.08;letter-spacing:-.044em;font-weight:780;overflow-wrap:anywhere}
.share-lead{margin:18px 0 0;color:var(--text);font-size:15px;line-height:1.7}
.share-meta{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:18px;color:var(--muted);font-size:12px}
.share-meta span+span::before{content:"·";margin-right:18px;color:var(--muted)}
.cards{display:grid;gap:16px}
.share-card{position:relative;padding:30px 32px 32px 72px;border:1px solid var(--line);border-radius:18px;background:var(--surface);box-shadow:0 14px 38px rgba(17,37,63,.055)}
html[data-theme="dark"] .share-card{box-shadow:0 14px 38px rgba(0,0,0,.16)}
.card-index{position:absolute;left:28px;top:35px;color:var(--cyan-strong);font-size:11px;font-weight:760;line-height:1;letter-spacing:.12em;font-variant-numeric:tabular-nums}
h2{margin:0 0 24px;color:var(--ink);font-size:clamp(22px,4vw,30px);line-height:1.35;letter-spacing:-.03em;font-weight:730;overflow-wrap:anywhere}
.section-label{margin-bottom:8px;color:var(--muted);font-size:11px;font-weight:700;letter-spacing:.08em}
.points-label{margin-top:28px}
.insight{margin:0;color:var(--text);font-size:16px;line-height:1.82;white-space:pre-wrap}
.points{list-style:none;counter-reset:point;margin:0;padding:0}
.points li{counter-increment:point;display:grid;grid-template-columns:24px 1fr;gap:10px;align-items:start;color:var(--text);line-height:1.78}
.points li+li{margin-top:10px}
.points li::before{content:counter(point) ".";color:var(--cyan-strong);font-size:12px;font-weight:700;padding-top:2px;font-variant-numeric:tabular-nums}
.points span{min-width:0;overflow-wrap:anywhere}
.original-answer{margin-top:28px;border:1px solid var(--line);border-radius:14px;background:var(--surface-soft);overflow:hidden}
.original-answer summary{min-height:48px;padding:0 16px;display:flex;align-items:center;justify-content:space-between;gap:16px;color:var(--ink);font-size:13px;font-weight:700;cursor:pointer;list-style:none;user-select:none}
.original-answer summary::-webkit-details-marker{display:none}
.original-answer summary::after{content:"+";flex:0 0 auto;color:var(--muted);font-size:18px;font-weight:400;line-height:1;transition:transform .18s ease}
.original-answer[open] summary::after{transform:rotate(45deg)}
.original-answer-hint{margin-left:auto;color:var(--muted);font-size:11px;font-weight:500}
.original-answer-body{border-top:1px solid var(--line);padding:18px 16px 20px;background:var(--surface)}
.original-answer-body p{margin:0;color:var(--text);font-size:14px;line-height:1.82;white-space:pre-wrap;overflow-wrap:anywhere;word-break:break-word}
.card-actions{display:flex;justify-content:flex-end;margin-top:26px;padding-top:18px;border-top:1px solid var(--line)}
.card-copy{min-height:34px;padding:0 13px;border:1px solid var(--line);border-radius:999px;background:var(--surface-soft);color:var(--text);font-size:12px;font-weight:650;cursor:pointer;transition:border-color .18s ease,background .18s ease,color .18s ease,transform .18s ease}
.card-copy:hover{border-color:var(--line-strong);background:var(--surface-blue);color:var(--ink)}
.card-copy:active{transform:scale(.97)}
.card-copy[data-state="success"]{border-color:color-mix(in srgb,var(--cyan-strong) 35%,var(--line));background:var(--surface-blue);color:var(--cyan-strong)}
.card-copy[data-state="error"]{color:var(--muted)}
.growth-card{margin-top:24px;padding:32px 34px;display:flex;align-items:center;justify-content:space-between;gap:28px;border:1px solid var(--line);border-radius:18px;background:linear-gradient(135deg,var(--surface-blue),var(--surface));box-shadow:0 14px 38px rgba(17,37,63,.045)}
html[data-theme="dark"] .growth-card{box-shadow:0 14px 38px rgba(0,0,0,.14)}
.growth-copy{max-width:620px}
.growth-kicker{margin:0 0 9px;color:var(--cyan-strong);font-size:10px;font-weight:780;letter-spacing:.14em}
.growth-card h2{margin:0;color:var(--ink);font-size:24px;line-height:1.35;letter-spacing:-.025em;font-weight:730}
.growth-copy>p:last-child{margin:10px 0 0;color:var(--text);font-size:14px;line-height:1.72}
.growth-cta{flex:0 0 auto;min-height:42px;padding:0 16px;display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--ink);border-radius:999px;background:var(--ink);color:var(--bg);font-size:13px;font-weight:700;transition:transform .18s ease,opacity .18s ease}
.growth-cta:hover{opacity:.9}
.growth-cta:active{transform:scale(.98)}
.state{min-height:48vh;display:grid;place-items:center;align-content:center;text-align:center;color:var(--muted);padding:50px 0}
.state h1{max-width:none;font-size:30px;letter-spacing:-.03em;margin-top:16px}
.state p{max-width:34em;margin:12px auto 0;font-size:14px}
.state-icon{width:48px;height:48px;display:grid;place-items:center;border:1px solid var(--line);border-radius:16px;background:var(--surface);box-shadow:var(--shadow);color:var(--muted);font-size:18px}
.loading-dot{width:8px;height:8px;border-radius:50%;background:var(--cyan-strong);box-shadow:0 0 0 7px color-mix(in srgb,var(--cyan) 14%,transparent);animation:breathe 1.4s ease-in-out infinite}
.state>.loading-dot+p{margin-top:20px}
.footer{display:flex;justify-content:space-between;align-items:center;gap:24px;margin-top:46px;padding:28px 0 0;border-top:1px solid var(--line);color:var(--muted);font-size:11px}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-mark{width:24px;height:27px}
.footer-brand div{display:grid;gap:2px}
.footer strong{color:var(--ink);font-size:13px}
.footer a{transition:color .18s ease}
.footer a:hover{color:var(--ink)}
@keyframes breathe{50%{transform:scale(.78);opacity:.58}}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}.loading-dot{animation:none}.theme-icon,.brand-mark img,.footer-mark{transition:none}}
@media(max-width:640px){
  .nav-shell{width:min(100% - 24px,920px);height:60px}
  .brand{font-size:14px}
  .brand-mark{width:25px;height:28px}
  .readonly{min-height:36px;padding:0 11px;font-size:11px}
  .theme-toggle{width:40px;height:40px}
  .page-shell{width:min(100% - 24px,920px);padding-top:38px;padding-bottom:max(38px,env(safe-area-inset-bottom))}
  .share-header{margin-bottom:26px}
  .kicker{margin-bottom:12px;font-size:11px}
  h1{font-size:clamp(34px,10.2vw,44px);line-height:1.1;letter-spacing:-.038em}
  .share-lead{margin-top:14px;font-size:15px;line-height:1.65}
  .share-meta{display:grid;gap:3px}
  .share-meta span+span::before{content:none}
  .cards{gap:12px}
  .share-card{padding:22px 18px 24px;border-radius:16px;box-shadow:0 10px 28px rgba(17,37,63,.05)}
  html[data-theme="dark"] .share-card{box-shadow:0 10px 28px rgba(0,0,0,.14)}
  .card-index{position:static;display:block;margin-bottom:12px;font-size:10px}
  h2{font-size:21px;line-height:1.38;margin-bottom:18px}
  .section-label{margin-bottom:6px}
  .points-label{margin-top:22px}
  .insight{font-size:15px;line-height:1.78}
  .points li{grid-template-columns:21px 1fr;gap:7px}
  .original-answer{margin-top:22px;border-radius:13px}
  .original-answer summary{min-height:46px;padding:0 13px;gap:10px;font-size:13px}
  .original-answer-hint{font-size:10px}
  .original-answer-body{padding:15px 13px 17px}
  .original-answer-body p{font-size:14px;line-height:1.78}
  .card-actions{margin-top:22px;padding-top:16px}
  .card-copy{min-height:38px;padding:0 14px;font-size:12px}
  .growth-card{margin-top:16px;padding:24px 20px;display:grid;gap:20px;border-radius:16px}
  .growth-card h2{font-size:21px;line-height:1.4}
  .growth-copy>p:last-child{font-size:14px}
  .growth-cta{width:100%;min-height:46px}
  .footer{align-items:flex-start;display:grid;gap:14px;margin-top:34px;padding-top:24px}
}
@media(max-width:390px){
  .readonly-long{display:none}
  .readonly-short{display:inline}
  .nav-tools{gap:6px}
  .page-shell{width:min(100% - 20px,920px)}
  h1{font-size:clamp(32px,10.5vw,40px)}
  .share-card{padding:20px 16px 22px}
  .points li{grid-template-columns:19px 1fr;gap:6px}
}