@import url('https://fonts.googleapis.com/css2?family=Crimson+Text:wght@400;600;700&family=EB+Garamond:wght@400;500;600;700;800&display=swap');

:root{
  --wine:#7A2E3A;
  --paper:#F2EADF;
  --ink:#2F3B36;
  --ink-2:#414F49;
  --line:rgba(47,59,54,.18);
  --r:28px;
  --shadow:0 26px 54px -32px rgba(47,59,54,.6);
  --maxw:1120px;
}

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

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

body{
  margin:0;
  background-color:var(--paper);
  background-image:radial-gradient(rgba(47,59,54,.055) 1px,transparent 1px);
  background-size:22px 22px;
  color:var(--ink);
  font-family:'Crimson Text',Georgia,'Songti SC','STSong',serif;
  font-size:17px;
  line-height:1.78;
  overflow-x:hidden;
}

img{max-width:100%;display:block}
p{margin:0 0 1em}
a{color:var(--wine)}

h1,h2,h3{
  font-family:'EB Garamond',Georgia,'Songti SC',serif;
  font-weight:700;
  line-height:1.14;
  letter-spacing:-.015em;
  margin:0;
}

a:focus-visible,button:focus-visible{
  outline:2px solid var(--wine);
  outline-offset:3px;
}

/* ── 顶栏：品牌行 ─────────────────────────── */
.topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  flex-wrap:wrap;
  padding:16px clamp(16px,4vw,52px);
  border-bottom:1px solid var(--line);
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:11px;
  min-height:44px;
  text-decoration:none;
  color:var(--ink);
  font-family:'EB Garamond',Georgia,serif;
  font-size:clamp(1.15rem,2.5vw,1.6rem);
  letter-spacing:.05em;
  transition:color .3s ease;
}
.brand:hover{color:var(--wine)}

.mark{
  width:22px;
  height:22px;
  border-radius:5px;
  background:var(--wine);
  transform:rotate(45deg);
  box-shadow:inset 0 0 0 2px rgba(242,234,223,.55);
  transition:transform .45s cubic-bezier(.2,.7,.3,1),background .3s ease;
}
.brand:hover .mark{transform:rotate(135deg);background:var(--ink)}

.cta{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:11px 24px;
  border-radius:999px;
  background:var(--wine);
  color:var(--paper);
  text-decoration:none;
  font-weight:600;
  letter-spacing:.08em;
  transition:background .3s ease,transform .3s ease,box-shadow .3s ease;
  box-shadow:0 14px 26px -18px rgba(122,46,58,.9);
}
.cta:hover{background:var(--ink);transform:translateY(-2px)}

/* ── 侧栏菜单行 ───────────────────────────── */
.dock{
  position:sticky;
  top:0;
  z-index:40;
  background:rgba(242,234,223,.93);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}

.menu{
  list-style:none;
  margin:0 auto;
  padding:7px clamp(10px,3vw,40px);
  max-width:var(--maxw);
  display:flex;
  flex-wrap:wrap;
  gap:3px;
}

.menu a{
  display:flex;
  align-items:center;
  gap:8px;
  min-height:44px;
  padding:10px 14px;
  border-radius:999px;
  color:var(--ink-2);
  font-size:16px;
  text-decoration:none;
  transition:background .3s ease,color .3s ease,transform .3s ease;
}
.menu a:hover{background:var(--wine);color:var(--paper);transform:translateY(-2px)}

.dot{
  width:6px;
  height:6px;
  flex:0 0 auto;
  border-radius:50%;
  background:var(--wine);
  transition:transform .35s ease,background .3s ease;
}
.menu a:hover .dot{background:var(--paper);transform:scale(1.7)}

/* ── 首屏（文案贴顶部，标题必在首屏内）───── */
.hero{
  position:relative;
  isolation:isolate;
  min-height:100svh;
  display:flex;
  align-items:flex-start;
  justify-content:flex-end;
  overflow:hidden;
  padding:clamp(24px,5.5vh,68px) clamp(18px,5vw,64px) clamp(96px,20vh,168px);
  background:var(--ink);
}

.hero-far{
  position:absolute;
  inset:-4% 0 0 0;
  z-index:0;
  background:
    radial-gradient(120% 90% at 82% 8%,rgba(122,46,58,.85),rgba(47,59,54,.96) 72%),
    var(--ink);
  will-change:transform;
}

.hero-img{
  position:absolute;
  inset:-9% 0 0 0;
  width:100%;
  height:120%;
  object-fit:cover;
  z-index:1;
  filter:contrast(1.06) saturate(.9);
  will-change:transform;
}

.hero-veil{
  position:absolute;
  inset:0;
  z-index:2;
  background:linear-gradient(205deg,rgba(47,59,54,.12) 0%,rgba(122,46,58,.42) 46%,rgba(24,31,27,.93) 100%);
}

.hero-badge{
  position:absolute;
  right:clamp(18px,5vw,64px);
  bottom:clamp(30px,7vw,74px);
  z-index:3;
  margin:0;
  padding:9px 20px;
  border-radius:999px;
  background:var(--paper);
  color:var(--wine);
  font-size:16px;
  letter-spacing:.14em;
  transform:rotate(-3deg);
  box-shadow:var(--shadow);
  will-change:transform;
}

.hero-copy{
  position:relative;
  z-index:3;
  text-align:right;
  max-width:44rem;
}

.hero-copy h1{
  color:var(--paper);
  font-size:clamp(2rem,6.6vw,4.6rem);
  text-shadow:0 8px 34px rgba(0,0,0,.38);
  text-wrap:balance;
}

/* ── 引言 ─────────────────────────────────── */
.lede{
  max-width:44rem;
  margin:clamp(44px,8vw,92px) auto 0;
  padding:0 clamp(18px,5vw,40px);
}

.lede h2{
  color:var(--wine);
  font-size:clamp(1.65rem,4.2vw,2.7rem);
  text-wrap:balance;
}

.subtitle{
  margin:16px 0 0;
  padding-left:16px;
  border-left:3px solid var(--wine);
  color:var(--ink-2);
  font-size:clamp(1.02rem,1.9vw,1.2rem);
  font-style:italic;
  line-height:1.66;
}

/* ── 正文 ─────────────────────────────────── */
.prose{
  max-width:44rem;
  margin:0 auto;
  padding:clamp(22px,4vw,40px) clamp(18px,5vw,40px) clamp(56px,9vw,110px);
  counter-reset:ch;
}

.prose > article{
  position:relative;
  padding:clamp(38px,7vw,66px) 0 clamp(26px,4vw,40px);
  border-top:1px solid var(--line);
  scroll-margin-top:96px;
}
.prose > article:first-child{border-top:0;padding-top:clamp(16px,3vw,28px)}

.prose > article::before{
  counter-increment:ch;
  content:counter(ch,decimal-leading-zero);
  position:absolute;
  top:clamp(10px,2vw,16px);
  left:0;
  font-family:'EB Garamond',Georgia,serif;
  font-size:.82rem;
  letter-spacing:.28em;
  color:var(--wine);
  opacity:.72;
}

.prose h2{
  color:var(--wine);
  font-size:clamp(1.5rem,3.2vw,2.15rem);
  margin-bottom:.55em;
  text-wrap:balance;
}

.prose h3{
  margin-top:1.7em;
  font-size:1.3rem;
  color:var(--ink);
}

.prose p{color:var(--ink-2)}

.prose a{
  text-decoration-color:rgba(122,46,58,.42);
  text-underline-offset:3px;
}

.prose ul,.prose ol{padding-left:1.35em;color:var(--ink-2)}
.prose li{margin-bottom:.5em}

.prose blockquote{
  margin:1.6em 0;
  padding:20px 24px;
  background:rgba(255,252,246,.72);
  border-left:4px solid var(--wine);
  border-radius:0 var(--r) var(--r) 0;
  box-shadow:var(--shadow);
}
.prose blockquote p:last-child{margin-bottom:0}

.prose img{border-radius:var(--r);box-shadow:var(--shadow);margin:1.4em 0}

/* 渐进揭示 */
.js .prose > article{
  opacity:0;
  transform:translateY(30px);
  transition:opacity .75s ease,transform .75s cubic-bezier(.2,.7,.3,1);
}
.js .prose > article.is-in{opacity:1;transform:none}

/* ── 页脚 ─────────────────────────────────── */
footer{
  background:var(--ink);
  color:var(--paper);
  padding:clamp(32px,6vw,64px) clamp(18px,5vw,48px) 0;
}

.f-cta{
  max-width:var(--maxw);
  margin:0 auto clamp(32px,6vw,58px);
  padding:clamp(26px,5vw,52px);
  border-radius:var(--r);
  background:linear-gradient(135deg,var(--wine),#551e27);
  box-shadow:var(--shadow);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}

.f-kicker{
  margin:0;
  font-family:'EB Garamond',Georgia,serif;
  font-size:clamp(1.35rem,3.4vw,2.1rem);
  color:var(--paper);
  letter-spacing:.03em;
}

.f-btn{
  display:inline-flex;
  align-items:center;
  min-height:48px;
  padding:13px 28px;
  border-radius:999px;
  background:var(--paper);
  color:var(--wine);
  text-decoration:none;
  font-weight:600;
  letter-spacing:.06em;
  transition:transform .3s ease,background .3s ease,color .3s ease;
}
.f-btn:hover{background:var(--ink);color:var(--paper);transform:translateY(-2px)}

.f-cols{
  max-width:var(--maxw);
  margin:0 auto;
  padding-bottom:clamp(28px,5vw,52px);
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(22px,4vw,48px);
}

.f-title{
  margin:0 0 10px;
  font-family:'EB Garamond',Georgia,serif;
  font-size:1.08rem;
  letter-spacing:.07em;
  color:var(--paper);
  opacity:.92;
}

.f-menu{list-style:none;margin:0;padding:0}

.f-menu a{
  display:flex;
  align-items:center;
  gap:9px;
  min-height:44px;
  padding:8px 0;
  color:rgba(242,234,223,.82);
  text-decoration:none;
  transition:color .3s ease,transform .3s ease;
}
.f-menu a:hover{color:var(--paper);transform:translateX(4px)}
.f-menu .dot{background:rgba(242,234,223,.62)}
.f-menu a:hover .dot{background:var(--paper)}

.f-base{
  border-top:1px solid rgba(242,234,223,.2);
  padding:20px 0 30px;
  text-align:center;
}
.f-base p{
  margin:0;
  font-size:15px;
  color:rgba(242,234,223,.7);
  letter-spacing:.05em;
}

/* ── 移动端 ───────────────────────────────── */
@media (max-width:820px){
  .f-cols{grid-template-columns:1fr 1fr}
  .f-col:first-child{grid-column:1 / -1}
}

@media (max-width:640px){
  body{font-size:16.5px}
  .hero{
    min-height:100svh;
    padding:clamp(20px,4.5vh,40px) 16px clamp(78px,22vh,130px);
  }
  .hero-copy{max-width:100%}
  .hero-copy h1{font-size:clamp(1.85rem,8.4vw,2.7rem)}
  .hero-badge{bottom:clamp(22px,7vw,44px);right:16px}
  .menu{padding:6px 10px;gap:2px}
  .menu a{padding:10px 12px;font-size:16px}
  .f-cols{grid-template-columns:1fr}
  .f-col:first-child{grid-column:auto}
  .f-cta{flex-direction:column;align-items:flex-start}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important}
  .js .prose > article{opacity:1;transform:none}
  .hero-img,.hero-far,.hero-badge{transform:none !important}
}

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