@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=Source+Sans+3:wght@300;400;500;600;700&display=swap');
*,*::before,*::after{box-sizing:border-box}
:root{
  --paper:#fafaf8;--ink:#1a1a1a;--mid:#4a4a4a;--chalk:#f2f0ea;
  --grain:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/></filter><rect width='140' height='140' filter='url(%23n)' opacity='0.24'/></svg>");
  --disp:'Bebas Neue','Source Sans 3',ui-sans-serif,system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --body:'Source Sans 3',ui-sans-serif,system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;overflow-x:hidden;
  font-family:var(--body);font-size:17px;line-height:1.75;color:var(--ink);
  background-color:var(--paper);background-image:var(--grain);background-size:140px 140px;
}
body.lock{overflow:hidden}
a{color:var(--ink)}
img{max-width:100%}
:focus-visible{outline:3px solid var(--mid);outline-offset:2px}

/* 页头 */
.top{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:12px 18px;border-bottom:2px solid var(--ink)}
.brand{display:inline-flex;align-items:center;gap:8px;font-family:var(--disp);font-size:28px;letter-spacing:.05em;text-decoration:none;color:var(--ink);transform:rotate(-1.4deg);padding:4px 2px}
.brand .mark{width:26px;height:26px;object-fit:contain;filter:grayscale(1) contrast(1.5)}
.mark-ink{display:inline-block;width:16px;height:16px;border:3px solid var(--ink);border-radius:14px 4px 12px 5px}
.tools{display:flex;align-items:center;gap:8px}
.find{display:flex;align-items:center;border:2px solid var(--ink);border-radius:9px 4px 10px 5px;background:#fff;overflow:hidden}
.find input{font:inherit;font-size:16px;border:0;padding:9px 10px;width:130px;background:transparent;color:var(--ink)}
.find input:focus{outline:2px solid var(--mid);outline-offset:-3px}
.find button{font:inherit;font-size:16px;border:0;border-left:2px solid var(--ink);background:var(--chalk);padding:9px 12px;min-height:42px;cursor:pointer;color:var(--ink)}
.burger{font:inherit;font-size:16px;min-height:42px;padding:9px 14px;border:2px solid var(--ink);border-radius:11px 5px 12px 6px;background:var(--ink);color:var(--paper);cursor:pointer}

/* 粘性锚点条 */
.strip{position:sticky;top:0;z-index:40;background:rgba(250,250,248,.97);border-bottom:2px solid var(--ink);padding:8px 12px;overflow-x:auto}
.jump{display:flex;gap:6px;width:max-content}
.jump a{flex:0 0 auto;display:inline-flex;align-items:center;min-height:40px;padding:8px 12px;font-size:15px;text-decoration:none;color:var(--mid);background:#fff;border:1px dashed #b9b5ac;border-radius:12px 5px 11px 6px}
.jump a:hover,.jump a[aria-current]{color:var(--ink);border-style:solid;border-color:var(--ink);transform:rotate(-1deg)}

/* 全屏遮罩菜单 */
.menu{position:fixed;inset:0;z-index:90;background:var(--ink);color:var(--paper);padding:58px 22px 30px;overflow-y:auto;display:grid;align-content:start}
.menu[hidden]{display:none}
.menu nav{display:grid;gap:2px}
.menu a{display:flex;align-items:center;min-height:52px;padding:10px 4px;font-family:var(--disp);font-size:clamp(24px,5.4vw,36px);letter-spacing:.05em;color:var(--paper);text-decoration:none;border-bottom:1px dashed #4a4a4a}
.menu a:hover{transform:translateX(5px);color:#fff}
.close{position:absolute;top:12px;right:16px;min-height:44px;padding:8px 14px;font:inherit;font-size:16px;background:transparent;color:var(--paper);border:2px solid var(--paper);border-radius:11px 5px 12px 6px;cursor:pointer}

/* 主区 */
main{display:block}
.hero{display:grid;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:22px;min-height:45vh;padding:34px 22px;border-bottom:2px solid var(--ink);scroll-margin-top:76px;background-image:radial-gradient(circle at 1px 1px,#d8d5cc 1px,transparent 0);background-size:20px 20px}
.hero-copy{text-align:right}
.hero h1{margin:0;font-family:var(--disp);font-size:clamp(34px,6.8vw,62px);line-height:1.06;letter-spacing:.02em}
.hero-fig{margin:0;max-width:206px;padding:8px;background:#fff;border:2px solid var(--ink);border-radius:13px 6px 15px 7px}
.hero-fig svg,.hero-fig img{display:block;width:100%;height:auto}
.hero-art{filter:grayscale(1) contrast(1.15)}

.stage{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:28px;align-items:start;max-width:1160px;margin:0 auto;padding:30px 22px 60px}
.prose{min-width:0}
.prose div{--rot:-.22deg;border:2px solid var(--ink);border-radius:10px;background:#fff;padding:20px 20px 24px;margin:0 0 26px;scroll-margin-top:76px}
.prose div:nth-child(even){--rot:.22deg}
.prose div.hit{outline:3px solid var(--ink);outline-offset:3px}
.prose h2{font-family:var(--disp);font-size:clamp(22px,3.4vw,30px);letter-spacing:.04em;margin:0}
.prose h2+hr{border:0;border-top:3px solid var(--ink);width:64px;margin:8px 0 16px}
.prose h3{font-size:19px;margin:24px 0 8px}
.prose p,.prose li{font-size:17px;line-height:1.78}
.prose p{margin:0 0 14px}
.prose ul,.prose ol{margin:0 0 14px;padding-left:22px}
.prose a{color:var(--ink);text-decoration:underline;text-decoration-style:dashed;text-underline-offset:3px}
.prose img{height:auto;border:2px solid var(--ink);border-radius:8px;filter:grayscale(.15)}
.prose figure{margin:16px 0}
.prose blockquote{margin:16px 0;padding:10px 14px;border-left:4px solid var(--mid);background:var(--chalk)}
.prose hr{border:0;border-top:2px dashed #c6c3ba;margin:18px 0}
.prose table{width:100%;border-collapse:collapse;font-size:16px}
.prose th,.prose td{border:1px solid var(--mid);padding:7px 9px;text-align:left}

/* 侧栏 */
.rail{position:sticky;top:64px;border-left:2px solid var(--ink);padding:0 0 0 16px}
.rail h2{margin:0;font-family:var(--disp);font-size:20px;letter-spacing:.06em}
.rail hr{border:0;border-top:2px dashed #c6c3ba;margin:8px 0 10px}
.rail ul{list-style:none;margin:0;padding:0}
.rail a{display:flex;align-items:center;min-height:40px;padding:7px 4px;font-size:16px;color:var(--mid);text-decoration:none;border-bottom:1px dashed #d5d1c8}
.rail a:hover{color:var(--ink);transform:translateX(2px)}

/* 页脚 */
footer{display:grid;grid-template-columns:1.3fr 1fr 1fr 1.2fr;gap:20px;align-items:start;border-top:3px solid var(--ink);background-color:var(--chalk);background-image:var(--grain);background-size:140px 140px;padding:26px 22px 18px}
footer div{min-width:0}
.f-brand .brand{font-size:26px}
footer dl{margin:0}
footer dt a{display:inline-flex;align-items:center;min-height:40px;padding:6px 0;font-size:16px;color:var(--mid);text-decoration:none;border-bottom:1px dashed #c1bdb3}
footer dt a:hover{color:var(--ink)}
footer dd{margin:0}
.f-bar{display:flex;flex-direction:column;align-items:flex-end;justify-content:space-between;gap:12px;text-align:right}
.f-bar p{margin:0;font-size:15px;color:var(--mid)}
.f-bar a{display:inline-flex;align-items:center;min-height:40px;padding:6px 12px;font-size:15px;color:var(--ink);text-decoration:none;border:2px solid var(--ink);border-radius:11px 5px 12px 6px}

/* 呈现动效 */
.rv{opacity:0;transform:translateY(16px) rotate(calc(var(--rot,0deg) * 2))}
.rv.in{opacity:1;transform:translateY(0) rotate(var(--rot,0deg));transition:opacity .3s steps(5,end),transform .32s cubic-bezier(.2,.85,.3,1);transition-delay:calc(var(--i,0) * 55ms)}

@media (max-width:900px){
  .stage{grid-template-columns:minmax(0,1fr)}
  .rail{position:static;order:2;border-left:0;border-top:2px dashed #c6c3ba;padding:14px 0 0}
  .rail ul{display:grid;grid-template-columns:1fr 1fr;gap:0 14px}
  footer{grid-template-columns:1fr 1fr}
  .f-bar{grid-column:1 / -1;flex-direction:row;align-items:center;text-align:left}
}
@media (max-width:620px){
  body{font-size:16px}
  .top{padding:10px 14px}
  .hero{grid-template-columns:minmax(0,1fr);gap:16px;padding:26px 16px}
  .hero-copy{order:1}
  .hero-fig{order:2;max-width:150px;justify-self:end}
  .stage{padding:22px 14px 44px;gap:20px}
  .prose div{padding:16px 14px}
  .prose h2{font-size:23px}
  .brand{font-size:24px}
  .find input{width:96px}
  footer{padding:22px 14px 16px;gap:14px}
}
@media (max-width:400px){
  .find input{width:76px}
  .burger,.find button{padding:9px 11px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .rv,.rv.in{opacity:1;transform:rotate(var(--rot,0deg));transition:none}
  .jump a:hover,.rail a:hover,.menu a:hover{transform:none}
}

button[aria-expanded]{min-width:44px;min-height:44px}