/* Matthew — 展览现场
   纯白底 · 衬线 · 细线条 · 大留白 */

:root{
  --paper:#ffffff;
  --ink:#111111;
  --ink-2:#4a4a4a;
  --grey:#8c8c8c;
  --line:#e4e4e4;
  --line-2:#f0f0f0;
  --serif:"Times New Roman",Times,"Songti SC",STSong,"Noto Serif CJK SC","Source Han Serif SC",serif;
  --sans:"Helvetica Neue",Helvetica,Arial,"PingFang SC","Hiragino Sans GB",sans-serif;
  --max:1440px;
  --pad:clamp(26px,5vw,80px);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--serif);font-size:16px;line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}

.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--pad)}
.mono{font-family:var(--sans);font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:var(--grey)}
.rule{height:1px;background:var(--line);border:0;margin:0}

/* ---------- nav ---------- */
header.nav{
  position:sticky;top:0;z-index:60;background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(8px);
  border-bottom:1px solid var(--line);
}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{font-size:14px;letter-spacing:.42em;text-transform:uppercase;font-family:var(--sans)}
.nav-links{display:flex;gap:34px}
.nav-links a{font-family:var(--sans);font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:var(--grey);transition:color .25s}
.nav-links a:hover{color:var(--ink)}
@media(max-width:640px){.nav-links{gap:18px}.brand{letter-spacing:.3em;font-size:12px}}

/* ---------- hero ---------- */
/* 只设上下内边距，避免覆盖 .wrap 的左右留白 */
.hero{padding-top:clamp(60px,11vw,150px);padding-bottom:clamp(50px,8vw,110px)}
.hero-grid{display:grid;grid-template-columns:1fr .62fr;gap:clamp(30px,6vw,90px);align-items:end}
.hero h1{
  font-size:clamp(46px,10.5vw,150px);line-height:.92;margin:0 0 6px;
  letter-spacing:.02em;font-weight:400;
}
.hero .sub{display:flex;flex-wrap:wrap;gap:8px 26px;margin-top:34px;color:var(--grey);font-size:13px;letter-spacing:.06em}
.hero-portrait{position:relative}
.hero-portrait img{width:100%;filter:grayscale(1) contrast(1.02)}
.hero-portrait figcaption{margin-top:12px;color:var(--grey);font-size:12px;letter-spacing:.05em}
.hero-statement{margin-top:clamp(46px,7vw,90px);max-width:720px;color:var(--ink-2)}
.hero-statement p{margin:0 0 1.1em}
@media(max-width:860px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-portrait{max-width:340px}
}

/* ---------- section head ---------- */
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:24px;padding-bottom:18px;border-bottom:1px solid var(--line);margin-bottom:clamp(34px,5vw,64px);flex-wrap:wrap}
.sec-head h2{margin:0;font-size:clamp(20px,2.4vw,28px);font-weight:400;letter-spacing:.24em}
.sec-head .cn{font-size:13px;color:var(--grey);letter-spacing:.3em;margin-left:14px}

/* ---------- 核心展件 / 关于 ---------- */
/* 同上：只设上下内边距，左右留白交给 .wrap */
.keynote{padding-top:clamp(30px,5vw,60px);padding-bottom:clamp(60px,9vw,120px)}
.keynote-grid{display:grid;grid-template-columns:1.55fr .95fr;gap:clamp(28px,4.5vw,70px);align-items:start}
.keynote .frame{border:1px solid var(--line);padding:clamp(14px,2vw,30px);background:#fff}
.keynote .frame img{width:100%;cursor:zoom-in}
.keynote-meta{padding-top:6px}
.keynote-meta .tag{display:inline-block;border:1px solid var(--ink);padding:4px 10px;font-family:var(--sans);font-size:9px;letter-spacing:.24em;text-transform:uppercase;margin-bottom:26px}
.keynote-meta h3{font-size:clamp(30px,4vw,46px);margin:0 0 10px;font-weight:400;letter-spacing:.14em}
.keynote-meta .label{color:var(--grey);font-size:14px;letter-spacing:.08em;margin-bottom:22px}
.keynote-meta .lead{color:var(--ink-2);margin-bottom:26px}
.keynote-meta .lead p{margin:0 0 1em}
.btn-more{display:inline-flex;align-items:center;gap:12px;font-family:var(--sans);font-size:10px;letter-spacing:.22em;text-transform:uppercase;border-bottom:1px solid var(--ink);padding-bottom:5px}
.btn-more:hover{color:var(--grey);border-color:var(--grey)}
@media(max-width:860px){.keynote-grid{grid-template-columns:1fr}}

/* ---------- 作品 masonry ---------- */
section.works{padding-bottom:clamp(60px,9vw,120px)}
.grid{columns:3;column-gap:clamp(24px,3.4vw,56px)}
@media(max-width:1080px){.grid{columns:2}}
@media(max-width:640px){.grid{columns:1}}
.card{break-inside:avoid;margin:0 0 clamp(34px,4.4vw,72px);cursor:pointer}
.card .box{position:relative;overflow:hidden;background:#fafafa}
.card .box img{width:100%;transition:transform 1.1s cubic-bezier(.16,.8,.3,1),opacity .5s}
.card:hover .box img{transform:scale(1.035)}
.card figcaption{display:flex;align-items:baseline;gap:12px;padding-top:13px;border-top:1px solid var(--line-2);margin-top:13px}
.card .num{font-family:var(--sans);font-size:10px;letter-spacing:.16em;color:var(--grey);flex:0 0 auto;padding-top:2px}
.card h3{margin:0;font-size:17px;font-weight:400;letter-spacing:.1em}
.card .meta{margin-left:auto;font-size:12px;color:var(--grey);letter-spacing:.04em;text-align:right;flex:0 0 auto}
@media(max-width:640px){.card .meta{display:none}}

/* ---------- 创作历程 ---------- */
section.process{padding-bottom:clamp(70px,10vw,140px)}
.scroller{display:flex;gap:clamp(18px,2.2vw,34px);overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:18px;scrollbar-width:thin}
.scroller::-webkit-scrollbar{height:1px}
.scroller::-webkit-scrollbar-thumb{background:var(--line)}
.pcard{flex:0 0 clamp(240px,25vw,330px);scroll-snap-align:start;cursor:pointer}
.pcard .pbox{position:relative;aspect-ratio:4/3;overflow:hidden;background:#f7f7f7;border:1px solid var(--line-2)}
.pcard .pbox img,.pcard .pbox video{width:100%;height:100%;object-fit:cover;transition:transform 1.1s cubic-bezier(.16,.8,.3,1)}
.pcard:hover .pbox img,.pcard:hover .pbox video{transform:scale(1.04)}
.pcard .play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;pointer-events:none}
.pcard .play span{font-family:var(--sans);font-size:9px;letter-spacing:.24em;text-transform:uppercase;color:var(--ink);background:rgba(255,255,255,.9);padding:7px 12px;border:1px solid var(--line)}
.pcard figcaption{padding-top:11px;margin-top:11px;border-top:1px solid var(--line-2)}
.pcard h4{margin:0 0 3px;font-size:15px;font-weight:400;letter-spacing:.1em}
.pcard .pmeta{font-size:12px;color:var(--grey)}
.hint{margin-top:20px;color:var(--grey);font-size:12px;letter-spacing:.06em}

/* ---------- 思想记录 ---------- */
.tlist{display:flex;flex-direction:column}
.trow{display:flex;align-items:baseline;gap:clamp(16px,3vw,34px);width:100%;text-align:left;background:none;border:none;border-top:1px solid var(--line-2);padding:clamp(18px,2.6vw,26px) 4px;cursor:pointer;font:inherit;color:inherit;transition:background .25s}
.trow:last-child{border-bottom:1px solid var(--line-2)}
.trow:hover{background:#fafafa}
.trow .tno{font-family:var(--sans);font-size:11px;letter-spacing:.18em;color:var(--grey);flex:0 0 auto}
.trow .ttl{font-size:clamp(16px,2vw,19px);letter-spacing:.1em;font-weight:400}
.trow .tarr{margin-left:auto;color:var(--grey);font-size:14px}
.trow:hover .tarr{color:var(--ink)}
.ttext .tline{margin:0 0 .9em;line-height:2}
.ttext .tline:last-child{margin-bottom:0}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);padding:clamp(40px,6vw,80px) 0 60px}
.foot-grid{display:grid;grid-template-columns:1fr auto;gap:30px;align-items:end}
.foot-grid .big{font-size:clamp(24px,3.6vw,44px);letter-spacing:.16em;margin:0}
.foot-note{color:var(--grey);font-size:13px;max-width:520px}
.foot-note p{margin:0 0 .7em}
@media(max-width:720px){.foot-grid{grid-template-columns:1fr}}

/* ---------- viewer ---------- */
.viewer{position:fixed;inset:0;z-index:200;background:#fff;overflow-y:auto;visibility:hidden;opacity:0;transition:opacity .35s}
.viewer.on{visibility:visible;opacity:1}
.vbar{position:sticky;top:0;z-index:5;background:rgba(255,255,255,.95);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:20px;padding:0 var(--pad);height:58px}
.vbar .vt{font-family:var(--sans);font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:var(--grey);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.vclose{font-family:var(--sans);font-size:10px;letter-spacing:.22em;text-transform:uppercase;flex:0 0 auto}
.vclose:hover{color:var(--grey)}
.vbody{max-width:820px;margin:0 auto;padding:clamp(30px,6vw,70px) var(--pad) 0}
.vimg{margin-bottom:6px;background:#fafafa}
.vimg img{width:100%;height:auto;display:block}
.vimg + .vimg{margin-top:8px}
.vcap{color:var(--grey);font-size:12px;letter-spacing:.05em;margin:8px 0 34px}
/* 与 .vbody 同宽同留白，文字才不会顶到屏幕两边；
   分隔线用伪元素内缩 var(--pad)，与上方图片左右边缘对齐 */
.vtext{position:relative;max-width:820px;margin:0 auto;padding:38px var(--pad) 0}
.vtext::before{content:'';position:absolute;left:var(--pad);right:var(--pad);top:0;height:1px;background:var(--line)}
.vtext h2{font-size:clamp(30px,4.6vw,52px);font-weight:400;letter-spacing:.12em;margin:0 0 8px}
.vtext .vlabel{color:var(--grey);font-size:14px;letter-spacing:.08em;margin-bottom:6px}
.vtext .vmedium{color:var(--grey);font-size:13px;letter-spacing:.04em;margin-bottom:34px}
.vsec{margin-bottom:34px}
.vsec h5{font-family:var(--sans);font-size:9.5px;letter-spacing:.24em;text-transform:uppercase;color:var(--grey);margin:0 0 12px;font-weight:400}
.vsec p{margin:0 0 1em;color:var(--ink-2)}
.vnav{position:relative;display:flex;justify-content:space-between;gap:20px;max-width:820px;margin:0 auto;padding:40px var(--pad) 90px;margin-top:50px}
.vnav::before{content:'';position:absolute;left:var(--pad);right:var(--pad);top:0;height:1px;background:var(--line)}
.vnav button{font-family:var(--sans);font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:var(--grey)}
.vnav button:hover{color:var(--ink)}
.vvid{width:100%;background:#000;display:block;min-height:180px}
.vstat{margin:12px 0 0;font-family:var(--sans);font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--grey)}

/* ---------- 窄屏（手机）---------- */
@media(max-width:640px){
  body{font-size:15.5px;line-height:1.9}
  .hero .sub{gap:6px 18px;margin-top:26px;font-size:12.5px}
  .hero-statement{margin-top:38px}
  .hero-statement p{margin-bottom:1em}
  .sec-head{gap:10px}
  .sec-head h2{letter-spacing:.18em}
  .sec-head .cn{letter-spacing:.2em;margin-left:10px}
  .keynote .frame{padding:12px}
  .keynote-meta .lead{font-size:15.5px}
  .card h3{font-size:16px}
  .pcard{flex:0 0 74vw}
  .hint{font-size:11.5px}
  .foot-grid{gap:22px}
  .foot-note{font-size:12.5px}
  .vbody{padding-top:26px}
  .vtext{padding-top:26px}
  .vtext h2{letter-spacing:.08em}
  .vtext .vmedium{margin-bottom:24px}
  .vsec p{font-size:15.5px}
  .vsec{margin-bottom:26px}
  .vnav{margin-top:36px;padding-top:28px;padding-bottom:70px}
}
@media(max-width:400px){
  .nav-links{gap:14px}
  .brand{letter-spacing:.22em}
}