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

:root{
  --ink:#1C1A18;
  --paper:#F4EBDD;
  --red:#C9452D;
  --line:rgba(28,26,24,.18);
  --disp:"Cormorant Garamond","Songti SC","Noto Serif SC",Georgia,serif;
  --body:"Libre Baskerville","Songti SC","Noto Serif SC",Georgia,serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  padding-bottom:98px;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--body);
  font-size:17px;
  line-height:1.85;
  overflow-x:hidden;
  overflow-wrap:break-word;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit}
h1,h2,h3{font-family:var(--disp);font-weight:600;line-height:1.18;margin:0;letter-spacing:.01em}
:focus-visible{outline:3px solid var(--red);outline-offset:3px}

/* 角落徽标 */
.brandmark{
  position:fixed;top:16px;left:16px;z-index:80;
  width:48px;height:48px;display:grid;place-items:center;
  background:var(--paper);border:2px solid var(--ink);color:var(--ink);
  text-decoration:none;font-family:var(--disp);font-size:23px;line-height:1;
  transition:background .25s ease,color .25s ease,border-color .25s ease;
}
.brandmark img,.brandmark .mark-img{width:100%;height:100%;object-fit:cover}
.brandmark:hover{background:var(--red);border-color:var(--red);color:var(--paper)}

/* 首屏 */
.hero{
  position:relative;isolation:isolate;overflow:hidden;
  min-height:100vh;min-height:100svh;
  display:grid;place-items:center;
  padding:104px 22px 128px;
  background:var(--ink);color:var(--paper);
}
.hero::before{
  content:"";position:absolute;inset:-120px;z-index:0;
  background-image:radial-gradient(circle,rgba(244,235,221,.22) 1px,transparent 1.5px);
  background-size:24px 24px;opacity:.55;
  animation:drift 26s linear infinite;
}
.hero-art{position:absolute;inset:-10% 0 auto;height:130%;z-index:1;will-change:transform}
.hero-art img{width:100%;height:100%;object-fit:cover;filter:grayscale(1) contrast(1.15);opacity:.4}
.hero::after{
  content:"";position:absolute;inset:0;z-index:2;pointer-events:none;
  background:linear-gradient(180deg,rgba(28,26,24,.8),rgba(28,26,24,.42) 42%,rgba(28,26,24,.95));
}
.hero-inner{position:relative;z-index:3;text-align:center;max-width:58rem}
.hero-title{font-size:clamp(2.35rem,8.4vw,6.4rem);letter-spacing:.01em}
.hero-title span{
  display:inline-block;
  animation:rise 1s cubic-bezier(.19,.9,.24,1) both,track 1.3s cubic-bezier(.19,.9,.24,1) both;
  text-shadow:0 2px 40px rgba(28,26,24,.5);
}
.hero-desc{
  max-width:38rem;margin:26px auto 0;
  font-size:clamp(1rem,1.6vw,1.12rem);line-height:1.95;
  color:rgba(244,235,221,.78);
  animation:rise .95s .3s cubic-bezier(.19,.9,.24,1) both;
}
.cue{
  display:inline-block;margin-top:38px;font-size:.95rem;letter-spacing:.42em;
  color:var(--red);animation:bob 2.6s ease-in-out infinite;
}

@keyframes rise{from{opacity:0;transform:translateY(36px)}to{opacity:1;transform:none}}
@keyframes track{from{letter-spacing:.24em}to{letter-spacing:.01em}}
@keyframes drift{to{background-position:24px 24px}}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(8px)}}

/* 版心 */
.wrap{
  max-width:1168px;margin:0 auto;padding:0 22px;
  display:grid;grid-template-columns:212px minmax(0,1fr);
  gap:52px;align-items:start;
}
.stage{grid-column:2;grid-row:1;min-width:0}
.rail{grid-column:1;grid-row:1;position:sticky;top:34px;padding-top:64px}

.rail-h{font-size:1rem;letter-spacing:.3em;color:var(--red)}
.rail-h span{display:block;border-bottom:2px solid var(--ink);padding-bottom:7px}
.rail-list{list-style:none;margin:14px 0 0;padding:0;font-size:.98rem}
.rail-list li{border-bottom:1px dotted var(--line)}
.rail-list a{display:block;padding:11px 0;text-decoration:none;line-height:1.5;transition:color .2s ease,padding-left .2s ease}
.rail-list a:hover{color:var(--red);padding-left:6px}

/* 正文 */
.paper{max-width:46rem;padding-bottom:44px;counter-reset:sec}
.paper>article{
  counter-increment:sec;
  padding:62px 0 42px;
  border-top:1px solid var(--line);
  scroll-margin-top:44px;
}
.paper>article:first-child{border-top:0;padding-top:74px}
.paper>article::before{
  content:counter(sec,decimal-leading-zero);
  display:block;font-family:var(--disp);font-size:clamp(2rem,5vw,3rem);
  line-height:1;color:var(--red);letter-spacing:.08em;margin-bottom:12px;
}
.paper h2{font-size:clamp(1.7rem,3.6vw,2.55rem);margin:0 0 20px}
.paper h2 span{border-bottom:3px solid var(--red);padding-bottom:5px}
.paper h3{font-size:1.24rem;margin:34px 0 12px;letter-spacing:.02em}
.paper p{margin:0 0 20px;max-width:40rem}
.paper ul,.paper ol{padding-left:1.35rem;margin:0 0 22px}
.paper li{margin:7px 0}
.paper a{color:var(--red);text-underline-offset:4px;text-decoration-thickness:2px}
.paper strong{color:var(--red)}
.paper blockquote{
  margin:28px 0;padding:18px 22px;
  border-left:4px solid var(--red);background:rgba(201,69,45,.07);
}
.paper blockquote p:last-child{margin-bottom:0}
.paper img{margin:26px 0;border:2px solid var(--ink)}
.paper hr{border:0;border-top:1px solid var(--line);margin:34px 0}

.js .paper>article{opacity:0;transform:translateY(22px);transition:opacity .8s ease,transform .8s cubic-bezier(.19,.9,.24,1)}
.js .paper>article.in{opacity:1;transform:none}

/* 页脚 */
.foot{
  margin-top:92px;background:var(--ink);color:var(--paper);
  padding:68px max(22px,calc((100% - 1124px) / 2)) 0;
  display:grid;grid-template-columns:1.4fr 1fr 1.2fr;gap:42px;
}
.foot h2{font-size:1rem;letter-spacing:.28em;margin:0 0 16px}
.foot h2 span{display:block;padding-bottom:9px;border-bottom:1px solid rgba(244,235,221,.35)}
.foot-logo{margin:16px 0 0}
.foot-logo img,.foot-logo .mark-img{width:48px;height:48px;object-fit:cover;border:2px solid var(--paper)}
.foot-logo .mark-txt{
  display:grid;place-items:center;width:48px;height:48px;
  border:2px solid var(--paper);font-family:var(--disp);font-size:23px;
}
.foot-list{list-style:none;margin:0;padding:0;font-size:.98rem}
.foot-list li{border-bottom:1px dotted rgba(244,235,221,.22)}
.foot-list a{display:block;padding:9px 0;min-height:42px;text-decoration:none;line-height:1.6;transition:color .2s ease,padding-left .2s ease}
.foot-list a:hover{color:var(--red);padding-left:6px}

.sub{display:grid;gap:10px;max-width:21rem}
.sub label{font-size:.88rem;letter-spacing:.2em;color:rgba(244,235,221,.72)}
.sub input{
  font:inherit;font-size:16px;padding:11px 13px;border-radius:0;
  background:transparent;border:2px solid rgba(244,235,221,.5);color:var(--paper);
}
.sub input::placeholder{color:rgba(244,235,221,.5)}
.sub button{
  font:inherit;font-size:16px;min-height:46px;padding:10px 18px;border-radius:0;
  background:var(--red);border:2px solid var(--red);color:var(--paper);
  letter-spacing:.22em;cursor:pointer;transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.sub button:hover{background:var(--paper);border-color:var(--paper);color:var(--ink)}

.footbar{
  grid-column:1 / -1;margin:46px 0 0;padding:20px 0 28px;
  border-top:1px solid rgba(244,235,221,.22);
  text-align:center;font-size:.88rem;letter-spacing:.12em;color:rgba(244,235,221,.7);
}

/* 底部固定条 */
.dock{
  position:fixed;left:0;right:0;bottom:0;z-index:90;
  display:flex;align-items:stretch;gap:8px;
  padding:6px 10px calc(6px + env(safe-area-inset-bottom));
  background:rgba(28,26,24,.97);
  border-top:2px solid var(--red);
  backdrop-filter:blur(6px);
}
.dock ol{
  list-style:none;display:flex;gap:2px;flex:1;min-width:0;
  margin:0;padding:0;overflow-x:auto;scrollbar-width:none;
}
.dock ol::-webkit-scrollbar{display:none}
.dock a{
  display:flex;align-items:center;min-height:46px;padding:0 13px;
  color:var(--paper);text-decoration:none;font-size:16px;letter-spacing:.04em;
  white-space:nowrap;border-bottom:3px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.dock ol a:hover,.dock ol a.on{color:var(--red);border-bottom-color:var(--red)}
.dock-cta{
  display:flex;align-items:center;min-height:46px;padding:0 16px;
  background:var(--red);color:var(--paper);text-decoration:none;
  font-size:16px;letter-spacing:.08em;white-space:nowrap;
  transition:background .2s ease,color .2s ease;
}
.dock-cta:hover{background:var(--paper);color:var(--ink)}

@media (max-width:900px){
  .wrap{grid-template-columns:1fr;gap:0;padding:0 18px}
  .stage{grid-column:1;grid-row:1}
  .rail{
    grid-column:1;grid-row:2;position:static;padding:34px 0 6px;
    border-top:2px solid var(--ink);margin-top:36px;
  }
  .rail-list{display:grid;grid-template-columns:1fr 1fr;gap:0 18px}
  .paper{max-width:none}
  .hero{padding:88px 18px 108px}
  .hero-desc{font-size:1rem}
  .foot{grid-template-columns:1fr;gap:34px;padding-top:54px}
  .footbar{margin-top:36px}
}

@media (max-width:420px){
  .dock a{padding:0 11px;font-size:16px}
  .dock-cta{padding:0 12px}
  .brandmark{width:44px;height:44px;top:12px;left:12px}
  .hero-title{font-size:clamp(2rem,9.6vw,2.9rem)}
  .rail-list{grid-template-columns:1fr}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html{scroll-behavior:auto}
  .js .paper>article{opacity:1;transform:none}
  .hero-art{transform:none !important}
}

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