@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,wght@0,400;0,500;0,700;1,400&family=Nunito:ital,wght@0,700;0,800;0,900;1,700&display=swap');

:root{
  --paper:#f5e6c8;
  --paper-2:#eedcba;
  --card:#fcf3e0;
  --caramel:#d4a574;
  --caramel-2:#bb8558;
  --ink:#262117;
  --ink-2:#4d4030;
  --ink-3:#7c6b53;
  --line:rgba(38,33,23,.16);
  --shadow:0 8px 20px rgba(70,48,22,.14);
  --shadow-lg:0 20px 40px rgba(70,48,22,.22);
  --r:10px;
  --dock-h:76px;
  --body:"DM Sans",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  --head:"Nunito","DM Sans",system-ui,"PingFang SC","Microsoft YaHei",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:hidden}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font:400 17px/1.75 var(--body);
  letter-spacing:.006em;
  padding-bottom:calc(var(--dock-h) + 14px);
}
body::before{
  content:"";
  position:fixed;
  inset:-8%;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(58vw 42vw at 92% -12%,rgba(255,186,92,.38),rgba(255,186,92,0) 68%),
    radial-gradient(52vw 44vw at -12% 104%,rgba(206,116,58,.24),rgba(206,116,58,0) 70%),
    radial-gradient(30vw 30vw at 30% 50%,rgba(255,236,200,.55),rgba(255,236,200,0) 70%);
  animation:leak 16s ease-in-out infinite alternate;
}
.grain{
  position:fixed;
  inset:0;
  z-index:60;
  pointer-events:none;
  opacity:.2;
  mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='0.55'/%3E%3C/svg%3E");
  background-size:180px 180px;
  animation:grainShift 1.1s steps(3) infinite;
}
.leak{
  position:fixed;
  inset:0;
  z-index:1;
  pointer-events:none;
  background:linear-gradient(205deg,rgba(255,206,138,.22),rgba(255,206,138,0) 46%);
}

main{position:relative;z-index:2}

.skip{
  position:absolute;
  left:14px;
  top:-70px;
  z-index:80;
  padding:10px 18px;
  border-radius:999px;
  background:var(--ink);
  color:var(--paper);
  text-decoration:none;
  transition:top .2s;
}
.skip:focus{top:14px}

/* ---------- 首屏 ---------- */
.hero{
  max-width:1180px;
  margin:0 auto;
  min-height:70vh;
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:clamp(20px,4vw,56px);
  align-items:center;
  padding:clamp(26px,5vw,62px) clamp(18px,4vw,40px) clamp(20px,3vw,38px);
}
.hero-copy{order:2;text-align:right}
.badge{
  display:inline-block;
  margin:0 0 1rem;
  padding:.32rem .95rem;
  border-radius:999px;
  background:var(--caramel);
  color:#3a2a15;
  font-family:var(--head);
  font-weight:800;
  font-size:.86rem;
  letter-spacing:.08em;
  box-shadow:0 6px 14px rgba(140,95,50,.28);
  transform:rotate(-1.6deg);
}
.hero h1{
  font-family:var(--head);
  font-weight:900;
  font-size:clamp(2rem,5.6vw,3.4rem);
  line-height:1.1;
  letter-spacing:-.015em;
  margin:0 0 .7rem;
}
.lede{
  margin:0 0 0 auto;
  max-width:34ch;
  color:var(--ink-2);
  font-size:1.01rem;
}

.polaroid{
  position:relative;
  order:1;
  margin:0;
  max-width:520px;
  padding:14px 14px 46px;
  background:#fdf8ec;
  border:1px solid rgba(38,33,23,.1);
  border-radius:5px;
  box-shadow:var(--shadow-lg);
  transform:rotate(-2.6deg);
}
.polaroid .hero-img{
  display:block;
  width:100%;
  height:auto;
  border-radius:3px;
  filter:sepia(.28) contrast(1.06) saturate(.78);
  animation:track 9s ease-in-out infinite;
}
.polaroid::after{
  content:"";
  position:absolute;
  inset:14px 14px 46px;
  border-radius:3px;
  pointer-events:none;
  mix-blend-mode:screen;
  background:linear-gradient(115deg,rgba(255,206,140,.28),rgba(255,206,140,0) 56%);
}

/* ---------- 侧栏 + 正文 ---------- */
.spread{
  max-width:1180px;
  margin:0 auto;
  padding:clamp(6px,1.5vw,16px) clamp(18px,4vw,40px) clamp(26px,5vw,56px);
  display:grid;
  grid-template-columns:230px minmax(0,1fr);
  gap:clamp(20px,3vw,40px);
  align-items:start;
}
.rail{
  position:sticky;
  top:18px;
  padding:16px 16px 20px;
  background:var(--card);
  border:1px solid rgba(38,33,23,.1);
  border-radius:var(--r);
  box-shadow:var(--shadow);
}
.rail h2{
  margin:0 0 .5rem;
  font-family:var(--head);
  font-weight:800;
  font-size:.95rem;
  letter-spacing:.16em;
  color:var(--ink-2);
}
.rail hr{
  border:0;
  border-top:1px dashed var(--caramel-2);
  margin:0 0 .85rem;
}
.rail-list{margin:0}
.rail-list dt{margin:0}
.rail-list dt + dt{margin-top:2px}
.rail-list a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:8px 12px;
  border-radius:999px;
  color:var(--ink-2);
  text-decoration:none;
  font-size:.95rem;
  line-height:1.4;
  transition:background .2s,color .2s,transform .2s;
}
.rail-list a:hover,.rail-list a:focus-visible{
  background:rgba(212,165,116,.36);
  color:var(--ink);
  transform:translateX(3px);
}

.prose{min-width:0}
.prose div{
  margin:0 0 clamp(18px,3vw,28px);
  padding:clamp(20px,3.4vw,34px);
  background:linear-gradient(180deg,#fdf6e6,#f8edd6);
  border:1px solid rgba(38,33,23,.08);
  border-radius:var(--r);
  box-shadow:var(--shadow);
  scroll-margin-top:20px;
  scroll-margin-bottom:calc(var(--dock-h) + 20px);
}
.prose div:first-child{margin-top:0}
.prose h2{
  font-family:var(--head);
  font-weight:800;
  font-size:clamp(1.45rem,3.4vw,1.95rem);
  line-height:1.26;
  letter-spacing:-.01em;
  margin:.1em 0 .35em;
}
.prose h3{
  font-family:var(--head);
  font-weight:800;
  font-size:clamp(1.12rem,2.4vw,1.32rem);
  margin:1.4em 0 .45em;
}
.prose hr{
  border:0;
  height:1px;
  margin:.2rem 0 1.1rem;
  background:linear-gradient(90deg,var(--caramel),rgba(212,165,116,0));
}
.prose p{margin:0 0 1em;color:var(--ink-2)}
.prose p:last-child{margin-bottom:0}
.prose ul,.prose ol{padding-left:1.25em;color:var(--ink-2)}
.prose li{margin:.35em 0}
.prose a{
  color:#8a4f22;
  text-decoration:underline;
  text-decoration-color:var(--caramel);
  text-underline-offset:3px;
}
.prose a:hover{color:var(--ink)}
.prose strong{color:var(--ink)}
.prose blockquote{
  margin:1.2em 0;
  padding:.7em 1.1em;
  border-left:3px solid var(--caramel);
  border-radius:0 var(--r) var(--r) 0;
  background:rgba(212,165,116,.18);
  color:var(--ink-2);
}
.prose figure{margin:1.2em 0}
.prose img{max-width:100%;height:auto;border-radius:6px;filter:sepia(.18) saturate(.9)}
.prose figcaption{margin-top:.45em;font-size:.9rem;color:var(--ink-3)}
.prose aside{
  margin:1.2em 0;
  padding:1em 1.1em;
  border:1px dashed var(--caramel);
  border-radius:var(--r);
  background:rgba(212,165,116,.16);
  color:var(--ink-2);
}
.prose table{
  display:block;
  width:100%;
  overflow-x:auto;
  border-collapse:collapse;
  font-size:.96rem;
}
.prose th,.prose td{border:1px solid var(--line);padding:.5em .7em;text-align:left;vertical-align:top}
.prose th{background:rgba(212,165,116,.25);font-weight:700}
.prose code{
  font-family:ui-monospace,Menlo,Consolas,monospace;
  font-size:.92em;
  padding:.1em .35em;
  border-radius:4px;
  background:rgba(38,33,23,.08);
}

/* ---------- 页脚 ---------- */
.foot{position:relative;z-index:2;margin-top:clamp(18px,4vw,40px);padding-bottom:10px}
.foot-cta{
  max-width:1180px;
  margin:0 auto clamp(22px,4vw,40px);
  padding:clamp(24px,5vw,46px) clamp(20px,4vw,40px);
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:16px;
  text-align:center;
  border-radius:var(--r);
  background:linear-gradient(140deg,#eccfa2,#d4a574 58%,#c08f5f);
  box-shadow:var(--shadow-lg);
}
.cta-label{
  margin:0;
  font-family:var(--head);
  font-weight:900;
  font-size:clamp(1.6rem,4.6vw,2.5rem);
  line-height:1.16;
  color:#2f2415;
}
.cta-btn{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:10px 26px;
  border-radius:999px;
  background:#2b2417;
  color:var(--paper);
  font-family:var(--head);
  font-weight:800;
  text-decoration:none;
  box-shadow:0 8px 18px rgba(43,36,23,.35);
  transition:transform .2s,box-shadow .2s;
}
.cta-btn:hover{transform:translateY(-2px);box-shadow:0 12px 22px rgba(43,36,23,.42)}

.foot-row{
  max-width:1180px;
  margin:0 auto;
  padding:16px clamp(18px,4vw,40px) 0;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 22px;
}
.foot-logo{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:40px;
  color:var(--ink);
  font-family:var(--head);
  font-weight:800;
  font-size:.98rem;
  text-decoration:none;
}
.logo-img{width:34px;height:34px;border-radius:50%;object-fit:cover}
.foot-nav dl{margin:0;display:flex;flex-wrap:wrap;gap:2px 14px}
.foot-nav dt{margin:0}
.foot-nav a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  color:var(--ink-2);
  font-size:.94rem;
  text-decoration:none;
  border-bottom:1px dashed transparent;
}
.foot-nav a:hover{color:var(--ink);border-bottom-color:var(--caramel-2)}
.copy{
  margin:0;
  font-size:.86rem;
  color:var(--ink-3);
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  line-height:1.5;
}
.host{font-size:.76rem;letter-spacing:.05em}

/* ---------- 底部固定条 ---------- */
.dock{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:50;
  display:flex;
  align-items:center;
  gap:12px;
  padding:10px clamp(12px,3vw,26px) calc(10px + env(safe-area-inset-bottom));
  background:rgba(245,230,200,.95);
  border-top:1px solid var(--line);
  box-shadow:0 -8px 24px rgba(70,48,22,.14);
  backdrop-filter:blur(6px);
}
.dock-brand{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  min-height:40px;
  color:var(--ink);
  font-family:var(--head);
  font-weight:900;
  font-size:1rem;
  letter-spacing:.02em;
  text-decoration:none;
}
.dock-nav{
  flex:1 1 auto;
  display:flex;
  gap:6px;
  padding:2px;
  overflow-x:auto;
  scrollbar-width:none;
}
.dock-nav::-webkit-scrollbar{display:none}
.pill{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:8px 15px;
  border-radius:999px;
  background:rgba(255,250,238,.92);
  border:1px solid var(--line);
  color:var(--ink-2);
  font-size:.93rem;
  white-space:nowrap;
  text-decoration:none;
  transition:background .2s,color .2s,transform .2s;
}
.pill:hover,.pill:focus-visible{background:var(--caramel);color:#33260f;transform:translateY(-2px)}
.dock-search{flex:0 0 auto}
.dock-search input{
  width:clamp(96px,16vw,156px);
  height:40px;
  padding:0 14px;
  border-radius:999px;
  border:1px solid var(--line);
  background:#fffaf0;
  color:var(--ink);
  font:inherit;
  font-size:.92rem;
}
.dock-search input:focus{outline:2px solid var(--caramel-2);outline-offset:2px}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(16px)}
.reveal.in{
  opacity:1;
  transform:none;
  transition:opacity .7s ease,transform .75s cubic-bezier(.2,.7,.3,1);
}
@keyframes track{
  0%,46%,58%,100%{transform:skewX(0deg) translateY(0)}
  50%{transform:skewX(-.6deg) translateY(1px)}
  54%{transform:skewX(.45deg) translateY(-1px)}
}
@keyframes leak{
  from{opacity:.7;transform:translate3d(0,0,0) scale(1)}
  to{opacity:1;transform:translate3d(-1.6%,1%,0) scale(1.05)}
}
@keyframes grainShift{
  0%{background-position:0 0}
  33%{background-position:-40px 22px}
  66%{background-position:28px -30px}
  100%{background-position:0 0}
}

/* ---------- 断点 ---------- */
@media (max-width:900px){
  .hero{grid-template-columns:1fr;min-height:0}
  .hero-copy{order:1;text-align:left}
  .lede{margin-left:0;max-width:44ch}
  .polaroid{order:2;max-width:100%;transform:rotate(-1.5deg)}
  .spread{grid-template-columns:1fr}
  .rail{position:static;padding:14px}
  .rail-list{display:flex;flex-wrap:wrap;gap:6px}
  .rail-list dt + dt{margin-top:0}
  .rail-list a{
    background:rgba(255,250,238,.9);
    border:1px solid var(--line);
    font-size:.9rem;
    padding:8px 13px;
  }
}

@media (max-width:640px){
  :root{--dock-h:132px}
  .dock{flex-wrap:wrap;row-gap:8px}
  .dock-nav{order:3;flex:1 1 100%}
  .dock-search input{width:112px}
  .foot-row{justify-content:center;text-align:center}
  .copy{flex:1 1 100%;order:3;align-items:center}
  .foot-nav dl{justify-content:center}
}

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

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