@import url('https://fonts.googleapis.com/css2?family=Libre+Bodoni:wght@400;500;600;700&family=Public+Sans:wght@300;400;500;600;700&display=swap');

:root{
  --paper:#fafaf8;
  --ink:#1a1a1a;
  --soft:#4a4a4a;
  --wash:#efece2;
  --serif:'Libre Bodoni',Georgia,'Times New Roman',serif;
  --sans:'Public Sans','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
html.menu-lock{overflow:hidden}
body{
  margin:0;
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  color:var(--ink);
  background-color:var(--paper);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='p'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23p)' opacity='0.22'/%3E%3C/svg%3E");
  background-attachment:fixed;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
p{margin:0 0 1em}
h1,h2,h3{font-family:var(--serif);font-weight:600;line-height:1.16;margin:0 0 .42em}
a{color:inherit;transition:transform .12s linear,color .12s linear,background-color .12s linear}
main section[id]{scroll-margin-top:136px}

/* ---------- 顶部两行 ---------- */
.bar{
  position:sticky;top:0;z-index:40;
  background-color:var(--paper);
  border-bottom:2px solid var(--ink);
}
.bar-row{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  max-width:1160px;margin:0 auto;padding:12px 20px;
}
.brand{
  font-family:var(--serif);font-size:22px;font-weight:700;
  letter-spacing:.02em;text-decoration:none;line-height:1.2;
}
.brand::after{
  content:"";display:block;height:3px;margin-top:3px;
  background:repeating-linear-gradient(90deg,var(--ink) 0 9px,transparent 9px 14px);
}
.burger{
  display:inline-flex;align-items:center;gap:9px;
  min-height:44px;padding:8px 16px;
  background:var(--paper);color:var(--ink);
  border:2px solid var(--ink);border-radius:18px 24px 18px 24px;
  font:inherit;font-size:16px;line-height:1;cursor:pointer;
}
.burger:active{transform:rotate(-1.4deg)}
.burger-mark{
  width:20px;height:13px;
  background:
    linear-gradient(var(--ink),var(--ink)) 0 0/100% 2px no-repeat,
    linear-gradient(var(--ink),var(--ink)) 0 50%/78% 2px no-repeat,
    linear-gradient(var(--ink),var(--ink)) 0 100%/92% 2px no-repeat;
}
.bar-strip{
  margin:0;padding:5px 20px;
  background:var(--ink);color:var(--paper);
  font-size:13px;letter-spacing:.16em;text-align:center;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}

/* ---------- 全屏遮罩菜单 ---------- */
.veil{
  position:fixed;inset:0;z-index:60;
  padding:96px 24px 48px;overflow:auto;
  background:var(--ink);color:var(--paper);
  transform:translateY(-102%);
  transition:transform .18s linear;
}
.veil.open{transform:none}
.veil-nav ol{list-style:none;margin:0 auto;padding:0;max-width:640px}
.veil-nav a{
  display:flex;align-items:center;min-height:54px;padding:8px 4px;
  font-family:var(--serif);font-size:24px;text-decoration:none;
  border-bottom:1px dashed rgba(250,250,248,.42);
}
.veil-nav li:nth-child(even) a{transform:rotate(-.5deg)}
.veil-nav a:hover{transform:translateX(5px);color:#fff}

/* ---------- 首屏 ---------- */
.hero{
  display:grid;grid-template-columns:1.05fr .95fr;gap:32px;align-items:center;
  min-height:70vh;max-width:1160px;margin:0 auto;padding:34px 20px 44px;
}
.hero-copy{text-align:left}
.sticker{
  display:inline-block;margin:0 0 18px;padding:4px 16px;
  border:2px solid var(--ink);border-radius:18px;
  background:var(--wash);transform:rotate(-3deg);
  font-size:14px;letter-spacing:.1em;
}
.sticker a{text-decoration:none;display:inline-block;padding:2px 0}
.hero h1{font-size:clamp(30px,5.4vw,58px);letter-spacing:-.015em;margin:0 0 .35em}
.hero-lead{color:var(--soft);max-width:42ch;margin:0}
.hero-figure{
  position:relative;margin:0;min-height:280px;
  border:2px solid var(--ink);border-radius:18px 30px 18px 30px;
  background:var(--wash);overflow:hidden;transform:rotate(.7deg);
}
.hero-figure::before{
  content:"";position:absolute;left:50%;top:-9px;z-index:2;
  width:92px;height:20px;margin-left:-46px;
  background:rgba(26,26,26,.12);border:1px solid rgba(26,26,26,.22);
  transform:rotate(-2deg);
}
.hero-photo{width:100%;height:100%;min-height:280px;object-fit:cover;filter:grayscale(.18) contrast(1.06)}

/* ---------- 内容骨架 ---------- */
.wrap{max-width:1160px;margin:0 auto;padding:0 20px 72px}
.stage{display:grid;grid-template-columns:236px minmax(0,1fr);gap:30px;align-items:start}

.rail{
  position:sticky;top:120px;
  padding:14px 16px;
  border:2px solid var(--ink);border-radius:18px;
  background:var(--paper);transform:rotate(-.5deg);
}
.rail-title{font-size:18px;letter-spacing:.08em;margin:0 0 4px}
.rail-nav ol{list-style:none;margin:0;padding:0}
.rail-nav a{
  display:block;min-height:42px;padding:9px 0;
  font-size:16px;text-decoration:none;
  border-bottom:1px dashed rgba(26,26,26,.28);
}
.rail-nav li:last-child a{border-bottom:0}
.rail-nav a:hover{transform:translateX(3px);color:var(--soft)}

.sheet{padding-top:6px}
.sheet > section{padding:34px 0;border-top:2px dashed rgba(26,26,26,.32)}
.sheet > section:first-child{border-top:0;padding-top:4px}
.sheet h2{font-size:clamp(23px,3.2vw,33px);position:relative;padding-bottom:11px}
.sheet h2::after{
  content:"";position:absolute;left:0;bottom:0;width:74px;height:4px;
  background:repeating-linear-gradient(90deg,var(--ink) 0 10px,transparent 10px 17px);
}
p.subtitle{font-style:italic;color:var(--soft);margin:-4px 0 16px;font-size:16px}
.sheet h3{font-size:20px;margin-top:1.3em}
.sheet p{max-width:70ch}
.sheet ul,.sheet ol{max-width:70ch;padding-left:1.25em}
.sheet li{margin:.36em 0}
.sheet a{
  text-decoration:underline;text-decoration-style:wavy;
  text-decoration-thickness:1px;text-underline-offset:4px;
}
.sheet a:hover{color:var(--soft)}
.sheet strong{background:linear-gradient(transparent 62%,#e6e1d2 62%)}
.sheet blockquote{
  margin:1.4em 0;padding:8px 0 8px 18px;
  border-left:4px solid var(--ink);
  font-family:var(--serif);font-style:italic;color:var(--soft);
}
.sheet img{margin:1.2em 0;height:auto;border:2px solid var(--ink);border-radius:18px;filter:grayscale(.12) contrast(1.04)}
.sheet figure{margin:1.2em 0}
.sheet table{width:100%;border-collapse:collapse;font-size:16px}
.sheet th,.sheet td{border:1px solid rgba(26,26,26,.5);padding:8px 10px;text-align:left}
.sheet th{background:var(--wash)}
.sheet code{padding:1px 5px;border:1px solid rgba(26,26,26,.35);border-radius:6px;font-size:15px}

/* 逐节抖入 */
.sheet > article{animation:sheetIn .45s linear both}
.sheet > article:nth-child(1){animation-delay:.02s}
.sheet > article:nth-child(2){animation-delay:.08s}
.sheet > article:nth-child(3){animation-delay:.14s}
.sheet > article:nth-child(4){animation-delay:.2s}
.sheet > article:nth-child(5){animation-delay:.26s}
.sheet > article:nth-child(6){animation-delay:.32s}
.sheet > article:nth-child(7){animation-delay:.38s}
.sheet > article:nth-child(n+8){animation-delay:.44s}
@keyframes sheetIn{
  from{opacity:0;transform:translateY(9px) rotate(-.25deg)}
  to{opacity:1;transform:none}
}

/* ---------- 页脚 ---------- */
.foot{
  margin-top:16px;padding:42px 20px 22px;
  border-top:2px solid var(--ink);
  background-color:var(--paper);
}
.foot-cta{
  max-width:720px;margin:0 auto;padding:26px 20px;
  border:2px dashed var(--ink);border-radius:18px;
  text-align:center;transform:rotate(-.4deg);
}
.foot-cta h2{font-size:clamp(22px,3vw,30px);margin:0 0 6px}
.foot-cta .subtitle{margin:0 0 16px}
.cta-btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:46px;padding:10px 24px;
  background:var(--ink);color:var(--paper);
  border:2px solid var(--ink);border-radius:18px;
  font-size:16px;text-decoration:none;
}
.cta-btn:hover{background:var(--paper);color:var(--ink)}
.foot-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;max-width:900px;margin:34px auto 0}
.fcol dl{margin:0}
.fcol dt{font-family:var(--serif);font-size:16px;letter-spacing:.06em;margin-bottom:6px}
.fcol dd{margin:0;color:var(--soft);font-size:16px}
.foot a{
  display:inline-flex;align-items:center;min-height:42px;
  text-decoration:none;border-bottom:1px dashed rgba(26,26,26,.3);
}
.foot-copy{text-align:center;font-size:14px;color:var(--soft);margin:30px 0 0}

/* ---------- 窄屏 ---------- */
@media (max-width:880px){
  .hero{grid-template-columns:1fr;min-height:0;gap:22px;padding-top:26px}
  .hero-figure,.hero-photo{min-height:212px}
  .hero-figure{transform:rotate(.4deg)}
  .stage{grid-template-columns:1fr;gap:20px}
  .rail{position:static;transform:none}
  .rail-nav ol{display:grid;grid-template-columns:1fr 1fr;gap:0 14px}
  .foot-cols{grid-template-columns:1fr;gap:16px;max-width:420px}
  .foot-cta{padding:22px 16px}
}
@media (max-width:430px){
  .bar-row{padding:10px 14px}
  .wrap{padding:0 14px 56px}
  .hero{padding:22px 14px 30px}
  .brand{font-size:20px}
  .veil-nav a{font-size:21px}
  .foot{padding:34px 14px 18px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .sheet > article{animation:none}
  .veil{transition:none}
  a{transition:none}
  .sticker,.rail,.hero-figure,.foot-cta{transform:none}
}
</style>

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