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

:root{
  --cream:#f5e6c8;
  --cream-lo:#efdcb9;
  --cream-hi:#fdf6e6;
  --tan:#d4a574;
  --tan-deep:#a9784c;
  --ink:#262117;
  --ink-soft:#4d402d;
  --line:rgba(38,33,23,.24);
  --radius:18px;
  --shadow:0 22px 44px -28px rgba(38,33,23,.85);
}

*,*::before,*::after{box-sizing:border-box}

html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  font-family:"Inter",-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:17px;
  line-height:1.7;
  color:var(--ink);
  background:
    radial-gradient(120% 68% at 94% -10%, rgba(212,165,116,.6), transparent 62%),
    radial-gradient(88% 56% at -6% 3%, rgba(255,214,170,.5), transparent 58%),
    linear-gradient(180deg,#f8ecd4 0%, var(--cream) 36%, var(--cream-lo) 100%);
  background-attachment:fixed;
  padding-bottom:108px;
  overflow-x:hidden;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:39;
  pointer-events:none;
  background:repeating-linear-gradient(180deg, rgba(38,33,23,.055) 0 1px, transparent 1px 3px);
  mix-blend-mode:multiply;
}

body::after{
  content:"";
  position:fixed;
  inset:-20vh 0;
  z-index:40;
  pointer-events:none;
  opacity:.3;
  mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.62'/%3E%3C/svg%3E");
  animation:grain 1.2s steps(3) infinite;
}

@keyframes grain{
  0%{transform:translate3d(0,0,0)}
  33%{transform:translate3d(-2%,1.4%,0)}
  66%{transform:translate3d(1.6%,-2%,0)}
  100%{transform:translate3d(0,0,0)}
}

a{color:var(--tan-deep);text-decoration:underline;text-underline-offset:3px}
a:hover{color:var(--ink)}

img{max-width:100%;display:block}

/* 首屏 */
.hero{
  position:relative;
  min-height:44vh;
  display:flex;
  align-items:flex-end;
  justify-content:flex-end;
  padding:70px 26px 54px;
  overflow:hidden;
  clip-path:polygon(0 0,100% 0,100% 100%,0 85%);
  background:linear-gradient(158deg,#ecd7b1 0%,#d4a574 52%,#9c6c43 100%);
}

.hero-frame{position:absolute;inset:0}

.hero-img{
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:.8;
  filter:sepia(.45) saturate(.78) contrast(1.07);
}

.hero::after{
  content:"";
  position:absolute;
  inset:0;
  background:
    radial-gradient(58% 44% at 90% 4%, rgba(255,198,132,.72), transparent 70%),
    radial-gradient(40% 34% at 6% 96%, rgba(255,226,186,.36), transparent 72%),
    linear-gradient(198deg, rgba(245,230,200,.12) 0%, rgba(38,33,23,.5) 100%);
}

.hero-copy{
  position:relative;
  z-index:2;
  max-width:660px;
  text-align:right;
}

.hero-title{
  margin:0 0 12px;
  font-size:clamp(29px,6vw,54px);
  line-height:1.16;
  letter-spacing:-.025em;
  font-weight:700;
  color:var(--cream-hi);
  text-shadow:0 2px 22px rgba(38,33,23,.5);
}

.lead{
  margin:0 0 6px;
  font-size:clamp(16px,2vw,18px);
  line-height:1.62;
  font-weight:400;
  color:rgba(253,246,230,.9);
  text-shadow:0 1px 14px rgba(38,33,23,.45);
}

/* 主体 */
.shell{
  max-width:1180px;
  margin:0 auto;
  padding:48px 26px 64px;
  display:grid;
  grid-template-columns:minmax(0,1fr) 268px;
  gap:46px;
  align-items:start;
}

.doc{min-width:0}

.story{min-width:0;overflow-wrap:break-word}

.story section{scroll-margin-top:24px}
.story section + section{
  margin-top:38px;
  padding-top:38px;
  border-top:1px dashed var(--line);
}

.story h2{
  margin:0 0 12px;
  font-size:clamp(21px,3.2vw,27px);
  line-height:1.36;
  letter-spacing:-.012em;
  font-weight:600;
  color:var(--ink);
}
.story h2::after{
  content:"";
  display:block;
  width:46px;
  height:3px;
  margin-top:11px;
  border-radius:2px;
  background:var(--tan);
}

.story h3{
  margin:26px 0 8px;
  font-size:18px;
  line-height:1.45;
  font-weight:600;
}

.story p{margin:0 0 16px}
.story p:last-child{margin-bottom:0}

.story ul,.story ol{margin:0 0 16px;padding-left:1.35em}
.story li{margin:6px 0}

.story blockquote{
  margin:22px 0;
  padding:16px 20px;
  background:var(--cream-hi);
  border-left:4px solid var(--tan);
  border-radius:0 12px 12px 0;
  color:var(--ink-soft);
}

.story table{
  width:100%;
  border-collapse:collapse;
  margin:18px 0;
  font-size:16px;
}
.story th,.story td{
  padding:10px 12px;
  border-bottom:1px solid var(--line);
  text-align:left;
  vertical-align:top;
}
.story th{background:rgba(212,165,116,.28);font-weight:600}

.story pre{
  overflow-x:auto;
  padding:16px;
  border-radius:14px;
  background:var(--ink);
  color:var(--cream);
  font-size:15px;
  line-height:1.6;
}
.story code{font-family:ui-monospace,Menlo,Consolas,monospace}

.story hr{border:0;border-top:1px dashed var(--line);margin:30px 0}

.story figure{margin:20px 0}

.polaroid,
.story img{
  padding:9px 9px 26px;
  background:var(--cream-hi);
  border-radius:4px;
  box-shadow:var(--shadow);
}

.subtitle{
  margin:0 0 14px;
  font-size:16px;
  line-height:1.5;
  letter-spacing:.06em;
  color:var(--ink-soft);
}

/* 侧栏 */
.rail{
  position:sticky;
  top:26px;
  padding:22px 20px 26px;
  border-radius:var(--radius);
  background:var(--cream-lo);
  box-shadow:var(--shadow);
}

.rail-h{
  margin:0 0 8px;
  font-size:20px;
  line-height:1.3;
  letter-spacing:.02em;
  font-weight:600;
}

.rail-list{
  margin:0;
  padding:0;
  list-style:none;
  display:grid;
  gap:2px;
}

.rail-list a{
  display:flex;
  align-items:center;
  min-height:42px;
  padding:0 10px;
  border-radius:10px;
  font-size:16px;
  color:var(--ink);
  text-decoration:none;
}
.rail-list a:hover{background:var(--tan)}

/* 页脚 */
.foot{
  max-width:1180px;
  margin:0 auto;
  padding:26px 26px 22px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px 26px;
  border-top:1px solid var(--line);
  color:var(--ink-soft);
  font-size:16px;
}

.foot-meta{min-width:0}

.foot-mark{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  font-weight:700;
  letter-spacing:.14em;
  font-size:16px;
  color:var(--ink);
  text-decoration:none;
}

.foot-links ul,
.dock .menu-panel{
  display:flex;
  flex-wrap:wrap;
  gap:2px 14px;
  margin:0;
  padding:0;
  list-style:none;
}

.foot-links a{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  font-size:16px;
  color:var(--ink-soft);
  text-decoration:none;
}
.foot-links a:hover{color:var(--ink);text-decoration:underline}

.foot-form{display:flex;align-items:center;gap:6px;min-width:0}

.foot-form input{
  width:min(42vw,180px);
  min-width:0;
  min-height:42px;
  padding:0 14px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(253,246,230,.85);
  font:inherit;
  font-size:16px;
  color:var(--ink);
}

.foot-form button{
  min-height:42px;
  padding:0 16px;
  border:0;
  border-radius:999px;
  background:var(--tan);
  color:var(--ink);
  font:inherit;
  font-size:16px;
  font-weight:600;
  cursor:pointer;
}
.foot-form button:hover{background:var(--tan-deep);color:var(--cream-hi)}

.foot-legal{margin-left:auto;font-size:16px}

/* 底部固定条 */
.dock{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:60;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:10px;
  padding:8px 14px;
  background:rgba(245,230,200,.97);
  border-top:2px solid var(--ink);
  box-shadow:0 -12px 30px -22px rgba(38,33,23,.9);
}

.dock-left{justify-self:start;min-width:0}
.dock-mark{
  justify-self:center;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 4px;
  font-size:16px;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--ink);
  text-decoration:none;
  white-space:nowrap;
}

.menu{position:relative}

.menu > summary{
  list-style:none;
  cursor:pointer;
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:44px;
  padding:0 14px;
  border-radius:999px;
  background:var(--ink);
  color:var(--cream);
  font-size:16px;
  font-weight:600;
  letter-spacing:.06em;
  user-select:none;
}
.menu > summary::-webkit-details-marker{display:none}

.menu > summary::after{
  content:"";
  width:0;
  height:0;
  border:5px solid transparent;
  border-bottom-color:currentColor;
  margin-top:-4px;
}
.menu[open] > summary::after{
  margin-top:4px;
  border-bottom-color:transparent;
  border-top-color:currentColor;
}

.menu-panel{
  position:absolute;
  left:0;
  bottom:calc(100% + 12px);
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:2px;
  width:min(80vw,320px);
  padding:10px;
  border-radius:14px;
  background:var(--cream-lo);
  box-shadow:0 24px 48px -24px rgba(38,33,23,.9);
  animation:panel .22s ease-out;
}

@keyframes panel{
  from{opacity:0;transform:translateY(8px)}
  to{opacity:1;transform:translateY(0)}
}

.menu-panel a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:0 12px;
  border-radius:9px;
  font-size:16px;
  color:var(--ink);
  text-decoration:none;
}
.menu-panel a:hover{background:var(--tan)}

.dock-search{
  justify-self:end;
  display:flex;
  align-items:center;
  gap:6px;
  min-width:0;
}

.dock-search input{
  width:min(38vw,180px);
  min-width:0;
  min-height:40px;
  padding:0 12px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(253,246,230,.9);
  font:inherit;
  font-size:16px;
  color:var(--ink);
}

.dock-search button{
  min-height:40px;
  padding:0 12px;
  border:0;
  border-radius:999px;
  background:var(--tan);
  color:var(--ink);
  font:inherit;
  font-size:16px;
  font-weight:600;
  cursor:pointer;
}
.dock-search button:hover{background:var(--tan-deep);color:var(--cream-hi)}

/* 滚动进入 */
.reveal{opacity:0;transform:translate3d(0,16px,0)}
.reveal.in{
  opacity:1;
  transform:none;
  transition:opacity .58s ease,transform .58s cubic-bezier(.2,.7,.3,1);
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  body::after{animation:none}
  .reveal{opacity:1;transform:none;transition:none}
}

/* 平板以下 */
@media (max-width:880px){
  .shell{
    grid-template-columns:minmax(0,1fr);
    gap:34px;
    padding:38px 20px 54px;
  }
  .rail{position:static;order:2}
  .hero{min-height:42vh;padding:58px 20px 46px}
  .foot{justify-content:flex-start;padding:24px 20px 20px}
  .foot-legal{margin-left:0}
}

@media (max-width:560px){
  body{font-size:17px;padding-bottom:100px}
  .hero{padding:52px 16px 42px;min-height:40vh}
  .hero-copy{max-width:100%}
  .dock{padding:8px 10px;gap:6px}
  .dock-mark{font-size:16px;letter-spacing:.06em}
  .menu > summary{padding:0 11px;gap:6px}
  .dock-search input{width:84px;padding:0 10px}
  .dock-search button{padding:0 10px}
  .foot-form input{width:min(56vw,170px)}
}

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