/* ==========================================================================
   伏昼 FUZHOU — 视觉系统
   参照 magdum.art：白底 / 极细字 / 巨型字标 / 横向漂移图卡
   ========================================================================== */

:root{
  --paper:#ffffff;
  --ink:#050505;
  --line:#e6e4de;
  --ash:#8a8a8a;
  --smoke:#f3f2ee;
  --gutter:clamp(1.25rem, 4vw, 4rem);
  --header-h:90px;
  --ease:cubic-bezier(.22, 1, .36, 1);
  --grain:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
ul{list-style:none;margin:0;padding:0}
h1,h2,h3,p{margin:0}

.wrap{max-width:1560px;margin:0 auto;padding-left:var(--gutter);padding-right:var(--gutter)}

/* ---------- Header ---------- */
.site-header{position:relative;z-index:30}
.site-header .wrap{
  display:flex;align-items:center;justify-content:space-between;gap:1.5rem;
  padding-top:1.75rem;padding-bottom:1rem;
}
.logo{display:inline-flex;align-items:baseline;gap:.55rem;line-height:1}
.logo b{font-size:1.05rem;font-weight:600;letter-spacing:.02em}
.logo i{
  font-style:normal;font-size:.62rem;letter-spacing:.3em;color:var(--ash);
  text-transform:uppercase;
}
.someone-nav{display:flex;align-items:center;gap:clamp(1rem,2.2vw,1.6rem);flex-wrap:nowrap}
.someone-nav a{
  display:inline-flex;align-items:center;
  font-size:.78rem;line-height:1;letter-spacing:.14em;text-transform:uppercase;
  opacity:.6;transition:opacity .2s ease;white-space:nowrap;
}
.someone-nav a:hover{opacity:1}
.someone-nav a.on{opacity:1}

/* ---------- 首页：漂移 ---------- */
.drift-hero{
  position:relative;
  height:calc(100svh - var(--header-h));
  min-height:600px;
  padding:0 var(--gutter);
  overflow:hidden;
  -webkit-user-select:none;user-select:none;
}
.drift-copy{position:relative;z-index:5;padding-top:1rem;max-width:1560px;margin:0 auto}
.drift-title{
  margin:0;
  font-size:clamp(4.2rem, 15.5vw, 13rem);
  font-weight:800;
  line-height:.82;
  letter-spacing:-.02em;
}
.drift-title .zh{letter-spacing:.02em}
.drift-title .en{
  display:block;font-weight:800;letter-spacing:-.03em;
  font-family:"Helvetica Neue",Impact,"Arial Black",sans-serif;
}
.drift-title > span{display:block;overflow:hidden}
.drift-title > span > span{
  display:inline-block;transform:translateY(110%);
  transition:transform .85s var(--ease);will-change:transform;
}
.drift-hero.is-ready .drift-title > span > span{transform:translateY(0)}
.drift-title > span:nth-child(2) > span{transition-delay:.08s}

.drift-intro{
  width:min(100%,620px);margin:1.6rem 0 0;
  font-size:clamp(1.05rem,1.9vw,1.45rem);line-height:1.35;font-weight:600;
}
.drift-meta{
  margin:1.1rem 0 0;
  font-size:clamp(.68rem,1.05vw,.78rem);line-height:1;
  font-weight:500;letter-spacing:.24em;color:var(--ash);text-transform:uppercase;
}
.drift-links{margin:1.9rem 0 0;display:flex;flex-wrap:wrap;gap:.9rem 1.6rem}
.drift-links a{
  font-size:.76rem;letter-spacing:.16em;text-transform:uppercase;
  border-bottom:1px solid var(--line);padding-bottom:3px;transition:border-color .2s ease;
}
.drift-links a:hover{border-color:var(--ink)}
.drift-intro,.drift-meta,.drift-links{
  opacity:0;transform:translateY(12px);
  transition:opacity .7s ease,transform .7s ease;
}
.drift-hero.is-ready .drift-intro,
.drift-hero.is-ready .drift-meta,
.drift-hero.is-ready .drift-links{opacity:1;transform:translateY(0)}
.drift-hero.is-ready .drift-meta{transition-delay:.14s}
.drift-hero.is-ready .drift-links{transition-delay:.2s}

/* 漂移图卡流 */
.drift-stream{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  height:58%;min-height:380px;
}
.drift-track{position:relative;height:100%;touch-action:pan-y;cursor:grab}
.drift-track.dragging{cursor:grabbing}
.drift-item{
  position:absolute;left:0;bottom:0;display:block;
  width:clamp(15rem,26vw,30rem);aspect-ratio:480/440;
  transform-origin:bottom left;will-change:transform;
  -webkit-tap-highlight-color:transparent;
}
.drift-media{
  position:absolute;inset:0;overflow:hidden;background:var(--smoke);
}
.drift-media img,
.drift-media .tile{
  position:absolute;top:0;left:0;
  width:112%;height:100%;object-fit:cover;display:block;
  transform:translate3d(var(--px,0%),0,0);
  transition:transform .5s var(--ease);
  pointer-events:none;-webkit-user-drag:none;
}
.drift-caption{
  position:absolute;left:0;top:-2.1rem;
  display:inline-flex;align-items:center;gap:.5rem;
  max-width:min(18rem,92vw);
  color:var(--ink);
  opacity:0;translate:0 100%;
  transition:opacity .32s var(--ease),translate .32s var(--ease);
  pointer-events:none;
}
.drift-caption::before{
  content:"";width:.5rem;height:.5rem;border-radius:50%;
  background:currentColor;flex:0 0 auto;
}
.drift-caption b{font-size:.75rem;line-height:1;font-weight:600;letter-spacing:.06em}
.drift-caption small{font-size:.7rem;letter-spacing:.1em;color:var(--ash);text-transform:uppercase}
.drift-item:hover .drift-caption,
.drift-item:focus-visible .drift-caption{opacity:1;translate:0 0}
.drift-item:hover .drift-media img,
.drift-item:hover .drift-media .tile{transform:translate3d(calc(var(--px,0%) - 3%),0,0)}

/* ---------- 占位图卡 ---------- */
.tile{
  position:relative;overflow:hidden;background:var(--smoke);
  background-image:var(--grain);
}
.tile::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(160deg,var(--tone,#2b3a4a),#0d0d0d 120%);
  opacity:1;
}
.tile::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(120% 90% at 50% 35%,rgba(255,255,255,.16),rgba(0,0,0,.42) 78%);
  mix-blend-mode:overlay;
}
.tile > span{
  position:absolute;inset:auto 0 14px 0;z-index:2;
  text-align:center;color:rgba(255,255,255,.5);
  font-size:.68rem;letter-spacing:.22em;text-transform:uppercase;
}

/* ---------- 内页通用 ---------- */
.page-head{
  padding:clamp(2rem,5vw,4rem) 0 clamp(1.5rem,3vw,2.5rem);
  border-bottom:1px solid var(--line);
}
.page-head h1{
  font-size:clamp(2.4rem,7vw,5rem);font-weight:800;line-height:.92;letter-spacing:-.02em;
}
.page-head .en{
  display:block;margin-top:.5rem;
  font-size:clamp(.7rem,1.1vw,.8rem);letter-spacing:.28em;color:var(--ash);text-transform:uppercase;
}
.page-head p{margin-top:1.2rem;max-width:620px;color:#3d3b37}

/* ---------- 作品页 ---------- */
.cat{padding:clamp(2.5rem,5vw,4.5rem) 0 0}
.cat-head{display:flex;align-items:baseline;gap:1rem;margin-bottom:1.1rem}
.cat-head h2{font-size:clamp(1.35rem,2.6vw,1.9rem);font-weight:600;letter-spacing:.01em}
.cat-head .en{font-size:.72rem;letter-spacing:.24em;color:var(--ash);text-transform:uppercase}
.cat-head .rule{flex:1;height:1px;background:var(--line)}
.cat-head .num{font-size:.72rem;letter-spacing:.18em;color:var(--ash)}

.work-grid{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:clamp(8px,1.5vw,14px);
}
@media(max-width:1100px){.work-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:720px){.work-grid{grid-template-columns:repeat(2,1fr)}}
.work-card{display:block;cursor:pointer}
.work-thumb{
  position:relative;overflow:hidden;aspect-ratio:4/3;background:var(--smoke);
}
.work-thumb .tile{position:absolute;inset:0}
.work-thumb img{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  transition:transform .6s ease;
}
.work-card:hover .work-thumb img{transform:scale(1.045)}
.work-card:hover .work-thumb .tile::before{transform:scale(1.045)}
.work-grid .work-title{
  margin-top:.5rem;letter-spacing:.04em;font-weight:400;font-size:.9rem;
  display:flex;gap:.45rem;align-items:baseline;
}
.work-grid .work-title i{font-style:normal;color:var(--ash);font-size:.76rem;letter-spacing:.14em;text-transform:uppercase}
.work-card:hover .work-title{opacity:.55}

/* ---------- 关于页 ---------- */
.about-grid{
  display:grid;grid-template-columns:1.5fr 1fr;gap:clamp(2rem,5vw,5rem);
  padding:clamp(2.5rem,5vw,4rem) 0;
}
@media(max-width:820px){.about-grid{grid-template-columns:1fr}}
.about-body p{max-width:640px;font-size:1.02rem;line-height:1.85;color:#2b2926}
.about-body p + p{margin-top:1.15rem}
.about-side dl{margin:0}
.about-side dt{
  font-size:.68rem;letter-spacing:.24em;color:var(--ash);text-transform:uppercase;
  padding-top:1.4rem;border-top:1px solid var(--line);
}
.about-side dd{margin:.4rem 0 0;font-size:.95rem}
.about-side dd a{border-bottom:1px solid var(--line);padding-bottom:2px}
.about-side dd a:hover{border-color:var(--ink)}

/* ---------- 灯箱 ---------- */
.lightbox{
  position:fixed;inset:0;z-index:100;display:none;
  align-items:center;justify-content:center;
  background:rgba(255,255,255,.96);padding:4vw;
}
.lightbox.on{display:flex}
.lightbox img{max-width:92vw;max-height:82vh;object-fit:contain}
.lightbox .lb-cap{
  position:absolute;left:0;right:0;bottom:3vh;text-align:center;
  font-size:.78rem;letter-spacing:.14em;color:var(--ash);text-transform:uppercase;
}
.lightbox .lb-close{
  position:absolute;top:2.2vh;right:3vw;background:none;border:0;cursor:pointer;
  font-size:.78rem;letter-spacing:.2em;text-transform:uppercase;color:var(--ink);opacity:.6;
}
.lightbox .lb-close:hover{opacity:1}

/* ---------- Footer ---------- */
.site-footer{border-top:1px solid var(--line);margin-top:clamp(3rem,7vw,6rem);padding:1.6rem 0 2.2rem}
.site-footer .wrap{
  display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;
  font-size:.72rem;letter-spacing:.14em;color:var(--ash);text-transform:uppercase;
}
.site-footer a{opacity:.75}
.site-footer a:hover{opacity:1}

@media(max-width:640px){
  :root{--header-h:76px}
  .drift-stream{height:52%;min-height:300px}
  .someone-nav a{font-size:.68rem;letter-spacing:.08em}
  .work-grid{gap:8px}
}
@media(prefers-reduced-motion:reduce){
  .drift-title > span > span{transform:none!important}
  .drift-intro,.drift-meta,.drift-links{opacity:1!important;transform:none!important}
}