@charset "UTF-8";
/* 妙仓AI教育 · 视觉系统 v2（2026-10-08）
   主色：赤陶橙 · 字体：全站黑体 · 底色：暖白 */
:root{
  --ink:#1B2733;          /* 主文字（深墨蓝，取自插画里的深色） */
  --ink-soft:#3D4A57;
  --brand:#C0612F;        /* 赤陶橙 —— 大面积 / 按钮 / 装饰 */
  --brand-strong:#A44A1F; /* 深一档 —— 链接与文字，保证对比度 */
  --brand-pale:#FBF1EA;
  --muted:#6E665E;        /* 暖灰 */
  --line:#E8DFD4;         /* 暖分隔线 */
  --pale:#FAF6F0;         /* 暖浅底 */
  --paper:#FFFDFA;
  --max:1280px;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:96px}
body{margin:0;color:var(--ink);background:var(--paper);font-family:var(--sans);font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
button{font:inherit}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--brand);outline-offset:4px;border-radius:2px}
img{max-width:100%}
.wrap{max-width:var(--max);margin:auto;padding:0 30px}

/* 顶栏 */
header{border-bottom:1px solid var(--line);background:rgba(255,253,250,.92);backdrop-filter:saturate(1.4) blur(8px);position:sticky;top:0;z-index:20}
.nav{height:78px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{font-size:25px;font-weight:800;letter-spacing:.5px;white-space:nowrap;color:var(--ink)}
.brand em{font-size:16px;font-style:normal;font-weight:500;border-left:1px solid var(--line);padding-left:12px;margin-left:11px;letter-spacing:.5px;color:var(--muted)}
.navlinks{display:flex;gap:26px;align-items:center;font-size:14.5px}
.navlinks a{position:relative;color:var(--ink-soft)}
.navlinks a:hover{color:var(--brand-strong)}
.outline{padding:9px 17px;border:1px solid var(--ink);border-radius:3px;color:var(--ink)!important}
.outline:hover{border-color:var(--brand);color:var(--brand-strong)!important}
.menu{display:none;background:var(--paper);border:1px solid var(--line);padding:6px 13px;color:var(--ink);border-radius:3px}

/* 通用 */
h1,h2,h3{font-family:var(--sans);font-weight:700;margin-top:0;letter-spacing:-.01em}
h1{font-size:50px;line-height:1.32;margin:16px 0 22px;text-wrap:balance}
h2{font-size:30px;line-height:1.45;margin-bottom:12px;text-wrap:balance}
h3{font-size:21px;line-height:1.6;margin-bottom:12px}
p{margin-top:0;text-wrap:pretty}
.eyebrow{color:var(--brand-strong);font-size:13px;letter-spacing:2.5px;font-weight:700}
.button{display:inline-block;background:var(--brand);color:#fff;padding:13px 24px;border-radius:3px;font-size:15.5px;font-weight:600;transition:background .18s}
.button:hover{background:var(--brand-strong)}
.textlink{color:var(--brand-strong);font-size:15px;white-space:nowrap}
.textlink:hover{text-decoration:underline;text-underline-offset:4px}
.intro{color:var(--muted);margin-bottom:26px}
.section-heading{display:flex;justify-content:space-between;align-items:baseline;gap:20px;margin-bottom:24px}
.section-heading h2{margin:0}
.example-label{font-size:13px;color:var(--muted);border:1px solid var(--line);padding:6px 12px;border-radius:3px;white-space:nowrap}

/* 内容页 */
.document{max-width:800px;margin:auto;padding:52px 28px 84px}
.crumb{color:var(--muted);font-size:14px;margin-bottom:34px}
.crumb a:hover{color:var(--brand-strong)}
.document h1{font-size:39px;margin-bottom:14px}
.document h2{font-size:25px;margin-top:40px}
.document h2:first-of-type{margin-top:32px}
.document p,.document li{color:var(--ink-soft)}
.document li{margin-bottom:10px}
.document .summary{font-size:18.5px;color:var(--ink);border-left:3px solid var(--brand);padding:14px 22px;background:var(--pale);margin:26px 0;border-radius:0 3px 3px 0}
.document .meta{font-size:13px;color:var(--muted);letter-spacing:.5px}
.document a:not(.button){color:var(--brand-strong);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px}
.document a:not(.button):hover{text-decoration-thickness:2px}
.document .qrblock{margin:8px 0 0}
.document img.qr{display:block;width:230px;max-width:62%;border-radius:10px;border:1px solid var(--line)}
/* ===== 每个内容页自己的开头形状 ===== */
.leadblock{margin:30px 0 0}
.leadflow{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:4px;overflow:hidden;background:#fff}
.leadflow>div{padding:20px 18px;border-left:1px solid var(--line)}
.leadflow>div:first-child{border-left:0}
.leadflow b{display:block;font-size:12px;letter-spacing:2px;color:var(--brand-strong);margin-bottom:8px}
.leadflow strong{display:block;font-size:17px;font-weight:700;margin-bottom:6px}
.leadflow span{display:block;color:var(--muted);font-size:13.5px;line-height:1.75}
.leadcards{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.leadcards>div{border:1px solid var(--line);border-radius:4px;padding:22px 20px;background:#fff}
.leadcards b{display:block;font-size:18px;font-weight:700;margin-bottom:8px}
.leadcards span{display:block;color:var(--muted);font-size:14px;line-height:1.8}
.leadtwo{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line);border-radius:4px;overflow:hidden}
.leadtwo>div{padding:24px 22px}
.leadtwo>div:first-child{background:var(--pale);border-right:1px solid var(--line)}
.leadtwo h3{font-size:15px;font-weight:700;letter-spacing:1px;margin:0 0 14px;color:var(--brand-strong)}
.leadtwo .no h3{color:var(--muted)}
.leadtwo ul{list-style:none;padding:0;margin:0}
.leadtwo li{position:relative;padding:6px 0 6px 21px;font-size:14.5px;line-height:1.7;color:var(--ink-soft)}
.leadtwo li:before{content:"";position:absolute;left:2px;top:14px;width:7px;height:7px;border-radius:50%;background:var(--brand)}
.leadtwo .no li:before{background:#C9BEB2}
.note{background:var(--pale);padding:22px 26px;border-radius:4px;margin:30px 0;border:1px solid var(--line)}
.note strong{color:var(--ink)}
.note p{margin:10px 0 0;font-size:15px}
details{border-bottom:1px solid var(--line);padding:18px 0}
summary{cursor:pointer;font-weight:650}
ul,ol{padding-left:24px}

/* 页脚 */
footer{padding:30px 0;font-size:13px;color:var(--muted);border-top:1px solid var(--line);margin-top:20px}
footer .wrap{display:flex;justify-content:space-between;gap:25px;flex-wrap:wrap}
.footerlinks{display:flex;gap:22px;flex-wrap:wrap}
.footerlinks a:hover{color:var(--brand-strong)}

.skip{position:absolute;top:-60px;left:20px;background:var(--paper);padding:12px;z-index:100;border-radius:3px}
.skip:focus{top:12px}

@media(max-width:950px){
  .navlinks{gap:16px}
  h1{font-size:42px}
}
@media(max-width:800px){
  .leadflow{grid-template-columns:1fr}
  .leadflow>div{border-left:0;border-top:1px solid var(--line);padding:16px 18px}
  .leadflow>div:first-child{border-top:0}
  .leadcards{grid-template-columns:1fr;gap:10px}
  .leadtwo{grid-template-columns:1fr}
  .leadtwo>div:first-child{border-right:0;border-bottom:1px solid var(--line)}
}
@media(max-width:700px){
  .wrap{padding:0 22px}
  .nav{height:70px}
  .brand{font-size:22px}
  .menu{display:block}
  .navlinks{display:none;position:absolute;top:70px;left:0;right:0;background:var(--paper);padding:18px 24px 22px;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:4px}
  .navlinks a{padding:11px 0;border-bottom:1px solid var(--line)}
  .navlinks a:last-child{border-bottom:0}
  .navlinks.open{display:flex}
  .outline{border:0;padding:11px 0;text-align:left}
  h1{font-size:33px;letter-spacing:-.02em}
  h2{font-size:25px}
  .document{padding-top:30px}
  .document h1{font-size:29px;line-height:1.35}
  .document h2{font-size:21px}
  .document .summary{font-size:17px;padding:13px 18px}
  .section-heading{flex-direction:column;align-items:flex-start;gap:10px}
  .section-heading h2{font-size:24px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .button{transition:none}
}