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

:root{
  --ink:#1f1f1f;
  --paper:#ffffff;
  --wash:#f5f5f5;
  --line:rgba(31,31,31,.12);
  --mute:rgba(31,31,31,.6);
  --serif:'Cinzel','Josefin Sans',Georgia,serif;
  --sans:'Josefin Sans',system-ui,-apple-system,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
}

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

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

body{
  margin:0;
  padding-bottom:104px;
  background:var(--wash);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.012em;
  overflow-x:hidden;
}

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

a{color:inherit}

p{margin:0 0 14px}

ul,ol{margin:0 0 14px;padding-left:1.25em}

li{margin:0 0 6px}

h1,h2,h3,h4{
  font-family:var(--serif);
  font-weight:600;
  line-height:1.28;
  letter-spacing:.03em;
  margin:0 0 10px;
}

h1{font-size:clamp(26px,5.2vw,60px)}
h2{font-size:clamp(21px,2.8vw,31px)}
h3{font-size:clamp(18px,2.1vw,23px)}

hr{border:0;border-top:1px solid var(--line);margin:12px 0 18px}

strong{font-weight:600}

/* 角落纯图标 */
.mark{
  position:fixed;
  left:16px;
  bottom:calc(84px + env(safe-area-inset-bottom));
  z-index:55;
  display:grid;
  place-items:center;
  width:46px;
  height:46px;
  background:var(--ink);
  border-radius:4px;
  text-decoration:none;
  box-shadow:0 6px 18px rgba(0,0,0,.18);
}
.mark img{width:26px;height:26px;object-fit:contain;filter:grayscale(1) brightness(0) invert(1)}
.mark-dot{width:11px;height:11px;border-radius:50%;background:var(--paper)}
.mark.infoot{position:static;flex:none}

/* 主区：右栏侧边 */
main{
  display:grid;
  grid-template-columns:minmax(0,1fr) 17rem;
  gap:18px;
  align-items:start;
  max-width:1240px;
  margin:0 auto;
  padding:0 18px;
}

div{grid-column:1;min-width:0}

div > article{
  background:var(--paper);
  border-radius:4px;
  padding:26px 22px;
  margin-bottom:14px;
  scroll-margin-top:18px;
  box-shadow:0 2px 12px rgba(0,0,0,.04);
}

div > article:nth-of-type(2n){background:#fbfbfb}
div > article:last-child{margin-bottom:0}

div article img{border-radius:4px;margin:6px 0 14px}

div article h2 + hr,div article h3 + hr{margin-top:0}

/* 首屏 */
.hero{
  position:relative;
  min-height:100svh;
  display:grid;
  grid-template-columns:repeat(12,1fr);
  grid-template-rows:auto 1fr auto;
  gap:14px;
  padding:96px 22px 132px;
  border-radius:4px;
  overflow:hidden;
  background:var(--paper);
  isolation:isolate;
  box-shadow:none;
}

.hero-shot-a,.hero-shot-b{
  margin:0;
  background:var(--wash);
  border-radius:4px;
  overflow:hidden;
  z-index:1;
}

.hero-shot-a{grid-column:1 / span 6;grid-row:1 / span 2;aspect-ratio:4/5}
.hero-shot-b{grid-column:3 / span 5;grid-row:2 / span 2;margin-top:34px;aspect-ratio:1/1;z-index:2}

.hero-shot-a img,.hero-shot-b img{width:100%;height:100%;object-fit:cover;margin:0;border-radius:4px}

.hero-copy{
  grid-column:7 / span 6;
  grid-row:1 / span 2;
  align-self:center;
  text-align:right;
  z-index:3;
}

.hero-copy h1{margin:0;letter-spacing:.02em}

.hero-word{
  position:absolute;
  left:-.06em;
  bottom:-.24em;
  z-index:0;
  font-family:var(--serif);
  font-weight:700;
  font-size:clamp(76px,20vw,240px);
  line-height:.78;
  letter-spacing:.04em;
  color:rgba(31,31,31,.055);
  white-space:nowrap;
  pointer-events:none;
  will-change:transform;
}

/* 侧边栏 */
.side{
  grid-column:2;
  align-self:start;
  position:sticky;
  top:18px;
  background:var(--paper);
  border-radius:4px;
  padding:22px 18px;
  box-shadow:0 2px 12px rgba(0,0,0,.04);
}

.side h2{
  font-size:19px;
  letter-spacing:.12em;
  margin:0 0 4px;
}

.side hr{margin:0 0 14px}

.side-desc{font-size:15px;color:var(--mute);line-height:1.7}

.side-nav ul{list-style:none;margin:0;padding:0}

.side-nav li{margin:0;border-top:1px solid var(--line)}

.side-nav li:first-child{border-top:0}

.side-nav a{
  display:flex;
  align-items:center;
  min-height:42px;
  padding:6px 2px;
  text-decoration:none;
  font-size:15px;
  color:var(--ink);
  transition:transform .2s ease,color .2s ease;
}

.side-nav a:hover{transform:translateX(3px);color:#000}

/* 页脚 */
.foot{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:26px;
  max-width:1240px;
  margin:34px auto 0;
  padding:46px 18px 26px;
  border-top:1px solid var(--line);
}

.foot-clip{display:flex;align-items:flex-end;gap:14px;flex:1 1 320px;min-width:0}

.foot-word{
  font-family:var(--serif);
  font-weight:700;
  font-size:clamp(30px,7vw,82px);
  line-height:.92;
  letter-spacing:.04em;
  white-space:nowrap;
}

.foot-nav{flex:0 1 auto}

.foot-nav ul{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  grid-template-columns:repeat(2,minmax(0,auto));
  gap:0 20px;
}

.foot-nav a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  font-size:15px;
  text-decoration:none;
  color:var(--mute);
}

.foot-nav a:hover{color:var(--ink)}

.foot-notes{flex:0 1 auto}

.foot-copy{margin:0;font-size:14px;color:var(--mute)}

.foot-seal{display:flex;gap:5px;padding-bottom:6px}

.foot-seal span{display:block;width:9px;height:9px;background:var(--ink);border-radius:50%}
.foot-seal span:nth-child(2){background:rgba(31,31,31,.5)}
.foot-seal span:nth-child(3){background:rgba(31,31,31,.25)}

/* 底部固定条 */
.dock{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:60;
  display:flex;
  justify-content:center;
  padding:8px 12px calc(8px + env(safe-area-inset-bottom));
  background:rgba(31,31,31,.95);
  backdrop-filter:blur(10px);
}

.dock-menu{position:relative}

.dock-menu > summary{
  list-style:none;
  cursor:pointer;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 24px;
  color:var(--paper);
  font-size:16px;
  letter-spacing:.3em;
  border:1px solid rgba(255,255,255,.34);
  border-radius:4px;
  transition:background .2s ease,color .2s ease;
}

.dock-menu > summary::-webkit-details-marker{display:none}

.dock-menu[open] > summary{background:var(--paper);color:var(--ink)}

.dock-menu > menu{
  position:absolute;
  left:50%;
  bottom:calc(100% + 10px);
  transform:translateX(-50%);
  width:min(86vw,380px);
  margin:0;
  padding:8px;
  list-style:none;
  background:var(--ink);
  border-radius:4px;
  box-shadow:0 20px 44px rgba(0,0,0,.34);
  max-height:70vh;
  overflow:auto;
}

.dock-menu > menu li{margin:0;border-bottom:1px solid rgba(255,255,255,.12)}
.dock-menu > menu li:last-child{border-bottom:0}

.dock-menu > menu a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:0 12px;
  color:var(--paper);
  text-decoration:none;
  font-size:16px;
}

.dock-menu > menu a:hover{background:rgba(255,255,255,.1)}

/* 动效 */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .55s ease,transform .55s ease}
.reveal.is-in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .hero-word{transform:none !important}
  .side-nav a:hover{transform:none}
}

/* 平板 */
@media (max-width:900px){
  main{grid-template-columns:minmax(0,1fr);padding:0 14px}
  div{grid-column:1}
  .side{grid-column:1;position:static;order:2;margin-bottom:14px}
  .side-nav ul{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}
  .side-nav li{border-top:1px solid var(--line)}
  .side-nav li:nth-child(2){border-top:0}
  .side-nav li:first-child{border-top:1px solid var(--line)}
}

/* 手机 */
@media (max-width:820px){
  .hero{
    grid-template-columns:1fr 1fr;
    grid-template-rows:auto auto;
    padding:70px 14px 118px;
    gap:10px;
  }
  .hero-shot-a{grid-column:1;grid-row:1;aspect-ratio:4/5}
  .hero-shot-b{grid-column:2;grid-row:1;margin-top:26px;aspect-ratio:4/5}
  .hero-copy{grid-column:1 / span 2;grid-row:2;text-align:right;align-self:start;padding-top:14px}
  .hero-word{font-size:clamp(64px,22vw,150px)}
  .foot{flex-direction:column;align-items:flex-start;gap:18px;padding-bottom:30px}
  .foot-clip{flex:0 0 auto}
  .foot-nav{width:100%}
  .foot-nav ul{grid-template-columns:1fr 1fr;gap:0 14px}
  .foot-seal{display:none}
}

@media (max-width:420px){
  .hero-copy h1{font-size:26px}
  div > article{padding:22px 16px}
}

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