/* 凡人AI · 个人技术分享站 */
:root { --ink:#14110d; --paper:#ece4d6; --gold:#e7c9a0; --accent:#e5623f; --muted:#b0a79a; --line:rgba(231,201,160,.17); --serif:'Noto Serif SC','Songti SC','STSong',serif; }
.shell { width:min(1120px,calc(100% - 80px)); margin-inline:auto; }
a,button { -webkit-tap-highlight-color:transparent; }
a:focus-visible,button:focus-visible { outline:2px solid var(--gold); outline-offset:6px; }
.skip-link { position:fixed; top:12px; left:12px; z-index:100; padding:12px 20px; background:var(--paper); color:var(--ink); transform:translateY(-180%); }
.skip-link:focus { transform:none; }
.site-header { position:sticky; top:0; z-index:40; background:rgba(20,17,13,.96); border-bottom:1px solid var(--line); backdrop-filter:blur(12px); }
.header-inner { min-height:84px; display:flex; align-items:center; gap:28px; }
.brand { display:inline-flex; gap:12px; align-items:center; color:var(--paper); font:900 24px/1 var(--serif); white-space:nowrap; }
.brand img { width:36px; height:36px; border-radius:4px; }
.brand-ai { font-family:Georgia,serif; font-size:23px; margin-left:3px; font-weight:400; }
.brand-note { padding-left:26px; border-left:1px solid var(--line); color:var(--muted); font-size:12px; letter-spacing:.08em; }
.site-nav { display:flex; gap:32px; align-items:center; margin-left:auto; align-self:stretch; }
.site-nav a { display:flex; align-items:center; position:relative; font-size:14px; color:var(--muted); white-space:nowrap; transition:color .2s; }
.site-nav a:hover,.site-nav a[aria-current] { color:var(--paper); }
.site-nav a[aria-current]::after { content:''; position:absolute; height:2px; background:var(--accent); bottom:0; left:0; right:0; }
.home-intro { padding-block:76px 68px; display:grid; grid-template-columns:1fr 250px; gap:72px; align-items:center; }
.eyebrow { display:flex; align-items:center; gap:12px; margin:0 0 26px; font-size:12px; letter-spacing:.17em; color:var(--gold); }
.eyebrow>span { width:6px; height:6px; background:var(--accent); }
.home-intro h1 { font:900 clamp(38px,4.2vw,60px)/1.3 var(--serif); letter-spacing:-.025em; margin:0 0 24px; }
.home-intro h1 em { font-family:Georgia,serif; color:var(--accent); font-style:normal; font-weight:400; }
.title-dot { color:var(--accent); }
.intro-description { margin:0; font-size:15px; line-height:1.95; color:var(--muted); }
.reading-link { display:inline-flex; gap:30px; align-items:center; margin-top:30px; padding-block:8px; font-size:14px; color:var(--gold); border-bottom:1px solid rgba(231,201,160,.4); transition:color .2s,border-color .2s; }
.reading-link:hover { border-color:var(--accent); }
.intro-note { display:flex; flex-direction:column; align-items:center; gap:18px; padding-block:12px; border-block:1px solid var(--line); }
.note-label,.note-caption { color:var(--muted); font-size:11px; letter-spacing:.16em; }
.note-glyph { font:400 154px/1.1 var(--serif); color:var(--gold); }
.note-caption { color:var(--gold); }
.section-heading { display:flex; justify-content:space-between; gap:20px; align-items:center; border-top:1px solid var(--line); padding-top:24px; margin-bottom:26px; }
.section-heading h2 { margin:0; font:700 21px/1.5 var(--serif); }
.section-heading>span,.section-heading>a { font-size:12px; color:var(--muted); }
.section-heading>a:hover { color:var(--accent); }
.featured-article { display:grid; grid-template-columns:.94fr 1.06fr; gap:40px; align-items:center; color:var(--paper); }
.featured-image { overflow:hidden; background:#ece4d6; aspect-ratio:2.35/1; border-radius:3px; }
.featured-image img { display:block; width:100%; height:100%; object-fit:contain; transition:transform .4s ease; }
.featured-article:hover .featured-image img { transform:scale(1.025); }
.featured-meta { display:flex; gap:20px; align-items:center; margin-bottom:18px; font-size:11px; letter-spacing:.04em; }
.featured-meta>span { color:var(--accent); }
.featured-meta time { color:var(--muted); font-variant-numeric:tabular-nums; }
.featured-copy h3 { margin:0 0 16px; font:700 clamp(22px,2.25vw,29px)/1.55 var(--serif); text-wrap:pretty; color:var(--paper); transition:color .2s; }
.featured-article:hover h3 { color:var(--gold); }
.featured-copy p { margin:0 0 23px; color:var(--muted); font-size:14px; line-height:1.9; }
.read-more { display:flex; gap:26px; color:var(--gold); font-size:13px; }
.latest-section { padding-block:64px 92px; }
.latest-section .section-heading { margin-bottom:10px; }
.article-row { display:grid; grid-template-columns:104px 1fr 28px; align-items:start; gap:24px; padding:27px 0; border-bottom:1px solid var(--line); }
.article-row time { padding-top:6px; font:12px/1.7 ui-monospace,'SF Mono',monospace; color:var(--muted); }
.article-row-content { min-width:0; }
.article-row h3 { margin:0 0 9px; font:700 20px/1.6 var(--serif); color:var(--paper); transition:color .2s; }
.article-row:hover h3 { color:var(--gold); }
.article-row p { margin:0; color:var(--muted); font-size:12px; line-height:1.7; }
.row-arrow { color:var(--muted); padding-top:5px; text-align:right; transition:transform .2s,color .2s; }
.article-row:hover .row-arrow { transform:translate(3px,-3px); color:var(--accent); }
.site-footer { border-top:1px solid var(--line); background:#171310; }
.footer-inner { display:grid; grid-template-columns:1fr auto; gap:34px; padding-block:36px 30px; }
.footer-brand { font:700 19px var(--serif); color:var(--paper); }
.footer-inner p { color:var(--muted); font-size:12px; margin:10px 0 0; }
.footer-links { display:flex; gap:28px; align-items:start; padding-top:6px; font-size:12px; }
.footer-links a { color:var(--muted); }
.footer-meta { grid-column:1/-1; display:flex; gap:24px; flex-wrap:wrap; padding-top:20px; border-top:1px solid var(--line); color:var(--muted); font-size:11px; padding-right:120px; }
.footer-meta a { color:inherit; }
.contact-widget { position:fixed; right:24px; bottom:24px; z-index:60; display:flex; flex-direction:column; align-items:flex-end; gap:12px; }
.contact-toggle { display:flex; align-items:center; gap:10px; cursor:pointer; border:1px solid rgba(231,201,160,.28); border-radius:4px; padding:13px 18px; color:var(--gold); background:#231b15; box-shadow:0 4px 20px rgba(0,0,0,.2); font-size:13px; font-weight:500; line-height:1.5; font-family:inherit; transition:border-color .2s,background .2s; }
.contact-toggle:hover { border-color:var(--accent); background:#2d2018; }
.contact-toggle:active { transform:translateY(1px); }
.contact-panel { width:232px; padding:20px; background:#211b15; border:1px solid rgba(231,201,160,.3); border-radius:4px; box-shadow:0 12px 36px #0005; }
.contact-panel-heading { display:flex; justify-content:space-between; align-items:center; gap:12px; margin-bottom:14px; font:700 16px var(--serif); }
.contact-panel-heading button { width:32px; height:32px; border:0; background:transparent; color:var(--muted); font-size:24px; cursor:pointer; }
.contact-panel img { display:block; width:176px; height:176px; margin:auto; }
.contact-panel p { font-size:12px; line-height:1.85; text-align:center; color:var(--paper); margin:14px 0 0; }
.contact-panel p span { color:var(--muted); }
.archive-intro { padding-block:64px 55px; }
.archive-intro h1 { font:900 clamp(34px,4vw,48px)/1.4 var(--serif); margin:0 0 18px; }
.article-meta { display:flex; flex-wrap:wrap; align-items:center; gap:12px; margin-bottom:22px; }
.article-intro { background:none !important; }
.article-intro>div { padding-top:56px !important; }
.empty-note { padding:24px 0; color:var(--muted); font-size:14px; }
@media(min-width:821px) { .post { font-size:17px; } }
@media(max-width:820px) {
  .shell { width:calc(100% - 40px); }
  .header-inner { min-height:72px; gap:20px; }
  .brand-note { display:none; }
  .home-intro { padding-block:50px 48px; grid-template-columns:1fr 150px; gap:24px; }
  .note-glyph { font-size:115px; }
  .note-label,.note-caption { font-size:9px; letter-spacing:.05em; }
  .featured-article { gap:24px; }
  .featured-copy h3 { font-size:22px; }
  .featured-copy p { font-size:13px; }
  .article-row { grid-template-columns:85px 1fr 20px; gap:18px; }
  .article-row h3 { font-size:18px; }
  .contact-widget { right:16px; bottom:16px; }
}
@media(max-width:600px) {
  .header-inner { min-height:68px; gap:12px; }
  .brand { gap:8px; font-size:21px; }
  .brand img { width:31px; height:31px; }
  .brand-ai { font-size:21px; }
  .site-nav { gap:22px; }
  .site-nav a { font-size:13px; }
  .home-intro { grid-template-columns:1fr; padding-block:43px 42px; }
  .intro-note { display:none; }
  .home-intro h1 { font-size:clamp(34px,9.8vw,46px); margin-bottom:20px; }
  .eyebrow { margin-bottom:22px; font-size:11px; }
  .intro-description { font-size:14px; }
  .intro-description br { display:none; }
  .reading-link { margin-top:20px; }
  .section-heading { padding-top:20px; margin-bottom:22px; }
  .section-heading h2 { font-size:19px; }
  .section-heading>span,.section-heading>a { font-size:11px; }
  .featured-article { grid-template-columns:1fr; gap:22px; }
  .featured-image { aspect-ratio:2.35/1; }
  .featured-copy h3 { font-size:23px; line-height:1.5; margin-bottom:12px; }
  .featured-meta { margin-bottom:12px; }
  .featured-copy p { margin-bottom:16px; }
  .latest-section { padding-block:44px 65px; }
  .article-row { grid-template-columns:1fr 20px; gap:8px 16px; padding:23px 0; }
  .article-row time { grid-column:1; padding:0; font-size:11px; }
  .article-row-content { grid-column:1; }
  .article-row h3 { font-size:18px; }
  .row-arrow { grid-column:2; grid-row:2; }
  .footer-inner { gap:26px; padding-bottom:90px; }
  .footer-links { gap:18px; }
  .footer-meta { padding-right:0; gap:12px; }
  .archive-intro { padding-block:44px 38px; }
  .article-intro>div { padding-top:36px !important; padding-bottom:36px !important; }
  .article-meta { gap:10px; }
  .article-meta span { letter-spacing:.04em !important; }
  .post { padding-top:30px !important; }
}

/* Three-link navigation */
@media(max-width:600px) {
 .header-inner { flex-wrap:wrap; padding-top:16px; gap:12px; }
 .site-nav { width:100%; margin-left:0; gap:28px; min-height:42px; }
 .footer-inner { grid-template-columns:1fr; }
 .footer-links { flex-wrap:wrap; }
}