:root{
  --paper:#f6f4f0;
  --ink:#17161a;
  --muted:#8b857c;
  --body:#4a4740;
  --line:rgba(23,22,26,.10);
  --accent:#9d7b45;
  --serif:"Songti SC","STSong","SimSun",Georgia,"Times New Roman",serif;
  --sans:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --pad:clamp(20px,5vw,72px);
  --maxw:1440px;
  --ease:cubic-bezier(.22,1,.36,1);
}

*{box-sizing:border-box}

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

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

body.is-locked{overflow:hidden}

img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3{margin:0;font-weight:400}
section[id]{scroll-margin-top:88px}

::selection{background:rgba(157,123,69,.24)}

/* ---------- boot ---------- */
.boot{
  position:fixed;inset:0;z-index:200;
  display:grid;place-content:center;justify-items:center;gap:16px;
  background:var(--paper);
  transition:opacity .6s ease,visibility .6s ease;
}
.boot.is-done{opacity:0;visibility:hidden;pointer-events:none}
.boot__name{font-family:var(--serif);font-size:clamp(26px,4.6vw,42px);letter-spacing:.34em;text-indent:.34em}
.boot__line{width:72px;height:1px;background:var(--accent);transform:scaleX(0);transform-origin:left center;animation:bootLine .9s var(--ease) .05s forwards}
@keyframes bootLine{to{transform:scaleX(1)}}
.boot__sub{font-size:10px;letter-spacing:.46em;text-indent:.46em;color:var(--muted)}

/* ---------- nav ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:120;
  display:flex;align-items:center;justify-content:space-between;
  padding:24px var(--pad);
  border-bottom:1px solid transparent;
  transition:padding .4s var(--ease),background .4s ease,border-color .4s ease,backdrop-filter .4s ease;
}
.nav.is-solid{
  padding-top:15px;padding-bottom:15px;
  background:rgba(246,244,240,.84);
  backdrop-filter:saturate(1.5) blur(16px);
  -webkit-backdrop-filter:saturate(1.5) blur(16px);
  border-bottom-color:var(--line);
}
.nav__brand{display:flex;align-items:baseline;gap:10px}
.nav__brand-cn{font-family:var(--serif);font-size:19px;letter-spacing:.18em}
.nav__brand-en{font-size:10px;letter-spacing:.36em;color:var(--muted)}
.nav__menu{display:flex;gap:clamp(18px,3vw,42px);font-size:13px;letter-spacing:.16em}
.nav__menu a{position:relative;padding-bottom:4px;color:var(--body)}
.nav__menu a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:currentColor;
  transform:scaleX(0);transform-origin:right center;
  transition:transform .5s var(--ease);
}
.nav__menu a:hover::after{transform:scaleX(1);transform-origin:left center}

/* ---------- hero ---------- */
.hero{
  position:relative;isolation:isolate;
  min-height:100vh;min-height:100svh;
  max-width:var(--maxw);margin:0 auto;
  padding:clamp(118px,17vh,190px) var(--pad) clamp(36px,7vh,72px);
  display:flex;flex-direction:column;justify-content:space-between;
}
.hero::before{
  content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(115% 78% at 82% 8%, rgba(157,123,69,.16), transparent 58%),
    radial-gradient(85% 65% at 2% 96%, rgba(23,22,26,.055), transparent 62%);
}
.hero__eyebrow{margin:0 0 clamp(18px,3.2vh,34px);font-size:11px;letter-spacing:.46em;color:var(--accent)}
.hero__title{
  margin:0 0 clamp(16px,3vh,28px);
  font-family:var(--serif);
  font-size:clamp(66px,15vw,186px);
  line-height:.94;letter-spacing:.06em;
}
.hero__role{margin:0 0 clamp(24px,4.4vh,44px);font-size:clamp(13px,1.35vw,16px);letter-spacing:.24em;color:var(--body)}
.hero__lead{max-width:44ch;margin:0 0 clamp(28px,5vh,52px);font-size:clamp(14px,1.3vw,16px);line-height:2.05;color:#5c5850}
.hero__meta{display:flex;flex-wrap:wrap;gap:12px 30px;font-size:12px;letter-spacing:.16em;color:var(--muted)}
.hero__meta li{position:relative;padding-left:17px}
.hero__meta li::before{content:"";position:absolute;left:0;top:.72em;width:7px;height:1px;background:var(--accent)}
.hero__foot{
  display:flex;justify-content:space-between;align-items:flex-end;gap:18px;
  margin-top:clamp(34px,7vh,80px);padding-top:clamp(20px,3vh,34px);
  border-top:1px solid var(--line);
  font-size:11px;letter-spacing:.32em;color:var(--muted);
}
.hero__scroll{display:inline-flex;align-items:center;gap:14px}
.hero__scroll::after{content:"";width:48px;height:1px;background:var(--accent);animation:scrollLine 2.8s ease-in-out infinite}
@keyframes scrollLine{0%,100%{transform:scaleX(.4);opacity:.42}50%{transform:scaleX(1);opacity:1}}
.hero__count b{font-family:var(--serif);font-weight:400;font-size:15px;letter-spacing:.1em;color:var(--ink)}

/* ---------- section head ---------- */
.section__head{
  display:flex;align-items:baseline;gap:clamp(14px,2vw,28px);
  padding-bottom:26px;margin-bottom:clamp(34px,6vh,68px);
  border-bottom:1px solid var(--line);
}
.section__idx{font-size:11px;letter-spacing:.3em;color:var(--accent)}
.section__title{font-family:var(--serif);font-size:clamp(26px,4vw,44px);letter-spacing:.16em}
.section__en{margin-left:auto;font-size:11px;letter-spacing:.38em;color:var(--muted)}

/* ---------- about ---------- */
.about{max-width:var(--maxw);margin:0 auto;padding:clamp(84px,14vh,164px) var(--pad)}
.about__lead{max-width:58ch;margin:0 0 clamp(44px,8vh,88px);font-size:clamp(15px,1.5vw,19px);line-height:2.1;color:#3f3c37}
.about__cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:clamp(30px,5vw,80px);margin-bottom:clamp(44px,8vh,88px)}
.about__col h3,.about__skills h3{margin:0 0 26px;font-size:11px;font-weight:400;letter-spacing:.34em;color:var(--muted)}
.timeline li{padding-bottom:26px;margin-bottom:26px;border-bottom:1px solid var(--line)}
.timeline li:last-child{padding-bottom:0;margin-bottom:0;border-bottom:0}
.t-time{display:block;margin-bottom:10px;font-size:11px;letter-spacing:.2em;color:var(--accent)}
.t-main{display:block;margin-bottom:6px;font-size:15px;line-height:1.75}
.t-sub{display:block;font-size:13px;line-height:1.8;color:var(--muted)}
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chips li{
  padding:8px 17px;border:1px solid var(--line);border-radius:999px;
  font-size:12px;letter-spacing:.08em;color:var(--body);
  transition:border-color .35s ease,color .35s ease,transform .35s var(--ease);
}
.chips li:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}

/* ---------- works ---------- */
.works{max-width:var(--maxw);margin:0 auto;padding:clamp(84px,14vh,164px) var(--pad)}
.works__note{margin:0 0 clamp(28px,5vh,52px);font-size:12px;letter-spacing:.14em;color:var(--muted)}
.gallery{display:flex;flex-direction:column;gap:clamp(26px,4.6vh,60px)}

.page{margin:0;cursor:zoom-in;outline:none}

/* 图片容器：用宽高比先占位，避免加载时页面跳动 */
.page__frame{
  position:relative;overflow:hidden;
  background:#efede8;
  aspect-ratio:var(--ar,2.829);
  box-shadow:0 20px 64px -30px rgba(23,22,26,.4);
}
.page__frame img{
  position:absolute;inset:0;
  width:100%;height:100%;
  display:block;object-fit:cover;object-position:center;
}
/* 低清占位图先显示，全尺寸图加载完成后淡入覆盖 */
.page__img{opacity:0;transition:opacity .5s ease}
.page__img.is-ready{opacity:1}

.page__frame::after{content:"";position:absolute;inset:0;background:rgba(23,22,26,0);transition:background .5s ease}
.page:hover .page__frame::after,
.page:focus-visible .page__frame::after{background:rgba(23,22,26,.05)}
.page:focus-visible .page__frame{box-shadow:0 0 0 2px var(--accent),0 20px 64px -30px rgba(23,22,26,.4)}
.page figcaption{display:flex;align-items:center;gap:16px;padding-top:16px;font-size:11px;letter-spacing:.26em;color:var(--muted)}
.page figcaption::after{content:"";flex:1;height:1px;background:var(--line)}
.page__no{font-family:var(--serif);font-size:13px;letter-spacing:.2em;color:var(--ink)}

/* ---------- contact ---------- */
.contact{max-width:var(--maxw);margin:0 auto;padding:clamp(84px,14vh,164px) var(--pad) 0}
.contact__lead{margin:0 0 clamp(34px,6vh,60px);font-family:var(--serif);font-size:clamp(22px,3.4vw,40px);letter-spacing:.12em;line-height:1.7}
.contact__list{
  display:flex;flex-wrap:wrap;gap:clamp(30px,6vw,96px);
  padding:clamp(26px,5vh,50px) 0;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.contact__list span{display:block;margin-bottom:12px;font-size:11px;letter-spacing:.32em;color:var(--muted)}
.contact__list a,.contact__list em{font-style:normal;font-size:clamp(15px,1.6vw,19px);letter-spacing:.06em}
.contact__list a{transition:color .35s ease}
.contact__list a:hover{color:var(--accent)}
.foot{display:flex;justify-content:space-between;gap:16px;padding:clamp(28px,5vh,54px) 0;font-size:11px;letter-spacing:.26em;color:var(--muted)}

/* ---------- viewer ---------- */
.viewer{
  position:fixed;inset:0;z-index:300;
  display:flex;align-items:center;justify-content:center;
  background:rgba(13,12,15,.96);
  opacity:0;visibility:hidden;
  transition:opacity .4s ease,visibility .4s ease;
}
.viewer.is-open{opacity:1;visibility:visible}
.viewer__stage{width:100%;height:100%;display:flex;align-items:center;justify-content:center;padding:clamp(14px,4vw,56px)}
.viewer__stage img{width:auto;height:auto;max-width:100%;max-height:100%;object-fit:contain;box-shadow:0 30px 90px -40px rgba(0,0,0,.9)}
.viewer__close{
  position:absolute;top:clamp(14px,3vw,30px);right:clamp(14px,3vw,30px);
  width:44px;height:44px;border:1px solid rgba(255,255,255,.26);border-radius:50%;
  background:transparent;color:#fff;font-size:14px;line-height:1;cursor:pointer;
  transition:background .3s ease,border-color .3s ease;
}
.viewer__close:hover{background:rgba(255,255,255,.13);border-color:rgba(255,255,255,.5)}
.viewer__nav{
  position:absolute;top:50%;transform:translateY(-50%);
  width:52px;height:52px;border:1px solid rgba(255,255,255,.2);border-radius:50%;
  background:transparent;color:#fff;font-size:22px;line-height:1;cursor:pointer;
  transition:background .3s ease,border-color .3s ease;
}
.viewer__nav:hover{background:rgba(255,255,255,.13);border-color:rgba(255,255,255,.5)}
.viewer__nav--prev{left:clamp(10px,2.4vw,34px)}
.viewer__nav--next{right:clamp(10px,2.4vw,34px)}
.viewer__bar{
  position:absolute;left:0;right:0;bottom:clamp(14px,3vw,30px);
  display:flex;justify-content:center;gap:26px;
  font-size:11px;letter-spacing:.26em;color:rgba(255,255,255,.62);
}
.viewer__spinner{
  position:absolute;top:50%;left:50%;width:26px;height:26px;margin:-13px 0 0 -13px;
  border:2px solid rgba(255,255,255,.22);border-top-color:rgba(255,255,255,.8);
  border-radius:50%;animation:spin .9s linear infinite;opacity:0;transition:opacity .3s;
}
.viewer.is-loading .viewer__spinner{opacity:1}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- responsive ---------- */
@media (max-width:820px){
  .nav__brand-en{display:none}
  .section__en{display:none}
  .hero__foot{flex-direction:column;align-items:flex-start;gap:14px}
  .foot{flex-direction:column;gap:8px}
}
@media (max-width:720px){
  .viewer__hint{display:none}
  .viewer__nav{width:44px;height:44px;font-size:19px}
  .page__frame{box-shadow:0 10px 30px -20px rgba(23,22,26,.45)}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .hero__scroll::after,.boot__line{animation:none;transform:none}
  .page__img{transition:none}
  *{transition-duration:.01ms !important}
}