/* R01 · 建筑事务所 / 骨架反解自 wam.studio
   基因：石灰白底 · 巨大无衬线 · 1px 细线 · 编号即节奏 · 零阴影 */

:root{
  --bg:#f1f0ec;
  --bg-2:#e7e5df;
  --ink:#131310;
  --muted:#6b6a62;
  --line:#d5d3cb;
  --pad:clamp(20px,4.2vw,60px);
  --max:1440px;
}

*{margin:0;padding:0;box-sizing:border-box}

html{-webkit-text-size-adjust:100%}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:"Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
  font-size:16px;
  line-height:1.6;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
}

::selection{background:var(--ink);color:var(--bg)}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}

:focus-visible{outline:2px solid var(--ink);outline-offset:4px}

/* ---------- 布局骨架 ---------- */
.wrap{
  max-width:var(--max);
  margin:0 auto;
  padding:0 var(--pad);
}
.rule{height:1px;background:var(--line);border:0}

/* ---------- 顶栏 ---------- */
.top{
  position:sticky;top:0;z-index:50;
  background:rgba(241,240,236,.86);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.top-in{
  max-width:var(--max);margin:0 auto;padding:0 var(--pad);
  height:74px;display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{display:flex;align-items:baseline;gap:10px;font-weight:600;letter-spacing:-.02em;font-size:15px}
.brand span{
  font-size:10px;letter-spacing:.18em;color:var(--muted);font-weight:500;
}
.nav{display:flex;gap:clamp(14px,2.2vw,34px);align-items:center}
.nav a{
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);
  padding:6px 0;position:relative;transition:color .25s ease;
}
.nav a::after{
  content:"";position:absolute;left:0;bottom:2px;width:100%;height:1px;background:currentColor;
  transform:scaleX(0);transform-origin:left;transition:transform .35s cubic-bezier(.22,1,.36,1);
}
.nav a:hover{color:var(--ink)}
.nav a:hover::after,.nav a[aria-current]::after{transform:scaleX(1)}
.nav a[aria-current]{color:var(--ink)}

/* ---------- 首屏 ---------- */
.hero{padding:clamp(48px,7vw,104px) var(--pad) 0}
.eyebrow{
  font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted);
  display:flex;gap:14px;align-items:center;margin-bottom:clamp(24px,3.4vw,44px);
}
.eyebrow::before{content:"";width:38px;height:1px;background:var(--ink);opacity:.5}

h1{
  font-size:clamp(2.5rem,7.4vw,6.6rem);
  line-height:1.02;
  letter-spacing:-.03em;
  font-weight:500;
  max-width:17ch;
}
h1 em{font-style:normal;color:#55544c}

.hero-foot{
  display:grid;grid-template-columns:1.2fr .9fr;gap:clamp(20px,4vw,60px);
  margin-top:clamp(32px,4.4vw,56px);
  padding-bottom:clamp(28px,4vw,48px);
  border-bottom:1px solid var(--line);
  align-items:end;
}
.hero-foot p{color:var(--muted);max-width:46ch;font-size:15px;line-height:1.75}
.hero-cta{display:flex;justify-content:flex-end;gap:10px;flex-wrap:wrap}

.btn{
  display:inline-flex;align-items:center;gap:10px;
  border:1px solid var(--ink);border-radius:999px;
  padding:12px 22px;font-size:13px;letter-spacing:.02em;
  transition:background .3s ease,color .3s ease;
}
.btn:hover{background:var(--ink);color:var(--bg)}
.btn.ghost{border-color:var(--line);color:var(--muted)}
.btn.ghost:hover{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn svg{width:13px;height:13px;flex:none}

/* ---------- 作品轮播 ---------- */
.reel{padding:clamp(20px,3vw,34px) 0 clamp(52px,6vw,88px)}
.reel-frame{
  position:relative;overflow:hidden;
  aspect-ratio:16/8.4;
  background:#dcdad3;
}
/* 图片位：用灰阶几何体模拟建筑摄影，替换时塞 img 即可 */
.plate{
  position:absolute;inset:0;
  background:
    linear-gradient(102deg,transparent 0 46%,rgba(255,255,255,.5) 46% 47.2%,transparent 47.2%),
    linear-gradient(180deg,#cfcdc6 0%,#b9b7b0 38%,#8f8d86 100%);
  transition:transform 1.1s cubic-bezier(.22,1,.36,1);
}
.plate::before{ /* 立面竖线 */
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(90deg,rgba(19,19,16,.14) 0 1px,transparent 1px 58px);
  mix-blend-mode:multiply;opacity:.55;
}
.plate::after{ /* 天光斜切 */
  content:"";position:absolute;left:-10%;top:-30%;width:70%;height:170%;
  background:linear-gradient(90deg,rgba(255,255,255,.42),transparent 70%);
  transform:rotate(14deg);
}
.reel-frame:hover .plate{transform:scale(1.03)}
.reel-meta{
  position:absolute;left:0;right:0;bottom:0;
  display:flex;justify-content:space-between;align-items:flex-end;gap:20px;
  padding:clamp(16px,2vw,28px);
  color:#fff;text-shadow:0 1px 14px rgba(0,0,0,.35);
}
.reel-title{font-size:clamp(18px,2.2vw,26px);letter-spacing:-.02em;line-height:1.25}
.reel-title small{display:block;font-size:11px;letter-spacing:.18em;text-transform:uppercase;opacity:.75;margin-top:8px}
.reel-count{font-family:ui-monospace,"SFMono-Regular",Menlo,monospace;font-size:12px;letter-spacing:.12em;white-space:nowrap}
.reel-count b{font-weight:400}

/* ---------- 通用区段 ---------- */
.sec{padding:clamp(52px,7vw,110px) 0}
.sec-head{
  display:flex;justify-content:space-between;align-items:baseline;gap:24px;
  padding-bottom:20px;border-bottom:1px solid var(--line);margin-bottom:clamp(24px,3.4vw,44px);
}
.sec-head h2{
  font-size:clamp(1.5rem,3vw,2.5rem);letter-spacing:-.03em;font-weight:500;max-width:20ch;line-height:1.06;
}
.sec-head .idx{font-family:ui-monospace,monospace;font-size:11px;letter-spacing:.16em;color:var(--muted)}

.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,5vw,80px);align-items:start}
.split p{color:var(--muted);font-size:15.5px;line-height:1.8;max-width:44ch}
.split .lead{color:var(--ink);font-size:clamp(1.05rem,1.6vw,1.35rem);line-height:1.55;letter-spacing:-.015em}

.three{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(16px,2.4vw,36px)}
.stat{border-top:1px solid var(--ink);padding-top:14px}
.stat b{display:block;font-size:clamp(2rem,3.6vw,2.9rem);font-weight:400;letter-spacing:-.04em;line-height:1}
.stat span{display:block;margin-top:10px;font-size:12.5px;color:var(--muted);letter-spacing:.02em}

/* ---------- 新闻列表 ---------- */
.news{border-top:1px solid var(--line)}
.news-row{
  display:grid;grid-template-columns:110px 1fr auto;gap:clamp(14px,3vw,36px);
  align-items:baseline;
  padding:clamp(18px,2.2vw,26px) 0;
  border-bottom:1px solid var(--line);
  transition:padding-left .35s cubic-bezier(.22,1,.36,1),background .35s ease;
}
.news-row:hover{padding-left:10px;background:rgba(255,255,255,.4)}
.news-row time{font-family:ui-monospace,monospace;font-size:12px;color:var(--muted);letter-spacing:.04em}
.news-row h3{font-size:clamp(15px,1.5vw,18px);font-weight:400;letter-spacing:-.015em;line-height:1.45}
.news-row .more{font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);white-space:nowrap}
.news-row:hover .more{color:var(--ink)}

/* ---------- 页脚 ---------- */
.foot{padding:clamp(44px,6vw,80px) 0 34px;border-top:1px solid var(--line);margin-top:clamp(40px,6vw,80px)}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:clamp(20px,3vw,44px)}
.foot h4{font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);margin-bottom:14px;font-weight:500}
.foot ul{list-style:none;display:grid;gap:9px}
.foot li a{font-size:13.5px;color:var(--muted);transition:color .25s}
.foot li a:hover{color:var(--ink)}
.foot-note{
  margin-top:clamp(36px,5vw,64px);padding-top:20px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:11.5px;color:var(--muted);letter-spacing:.04em;
}

/* ---------- 内页 ---------- */
.page-head{padding:clamp(40px,6vw,88px) 0 clamp(24px,3vw,40px)}
.page-head h1{font-size:clamp(2.2rem,6vw,5.2rem)}
.page-head .sub{margin-top:22px;color:var(--muted);max-width:52ch;font-size:15px;line-height:1.8}

.proj{
  display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(18px,2.6vw,40px) clamp(18px,2.6vw,36px);
  padding-bottom:clamp(40px,6vw,80px);
}
.card{cursor:pointer}
.card .thumb{
  position:relative;overflow:hidden;aspect-ratio:4/3;background:#dcdad3;
}
.card .thumb .plate{filter:saturate(.9)}
.card:nth-child(3n+2) .thumb .plate{
  background:linear-gradient(180deg,#c6c4bd,#9d9b94 60%,#6f6d67);
}
.card:nth-child(3n) .thumb .plate{
  background:linear-gradient(115deg,#d8d6cf 0 55%,#a9a79f 55% 100%);
}
.card:hover .plate{transform:scale(1.04)}
.card-meta{display:flex;justify-content:space-between;gap:16px;padding-top:14px;border-top:1px solid var(--line);margin-top:14px}
.card-meta h3{font-size:17px;font-weight:400;letter-spacing:-.015em}
.card-meta p{font-size:12px;color:var(--muted);margin-top:4px}
.card-meta .num{font-family:ui-monospace,monospace;font-size:11px;color:var(--muted)}

.people{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(14px,2vw,28px)}
.person .face{
  aspect-ratio:3/4;background:linear-gradient(160deg,#d3d1ca,#b3b1aa 55%,#8b8983);
  position:relative;overflow:hidden;
}
.person .face::after{
  content:"";position:absolute;left:50%;top:34%;width:38%;aspect-ratio:1;border-radius:50%;
  background:rgba(19,19,16,.16);transform:translateX(-50%);
}
.person b{display:block;margin-top:12px;font-weight:400;font-size:14.5px}
.person span{display:block;font-size:12px;color:var(--muted)}

/* ---------- 入场 ---------- */
.rv{opacity:0;transform:translateY(18px);transition:opacity .9s cubic-bezier(.22,1,.36,1),transform .9s cubic-bezier(.22,1,.36,1)}
.rv.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:900px){
  .hero-foot{grid-template-columns:1fr;align-items:start}
  .hero-cta{justify-content:flex-start}
  .split{grid-template-columns:1fr}
  .three{grid-template-columns:1fr;gap:26px}
  .foot-grid{grid-template-columns:1fr 1fr}
  .proj{grid-template-columns:1fr}
  .people{grid-template-columns:1fr 1fr}
  .news-row{grid-template-columns:84px 1fr;row-gap:8px}
  .news-row .more{display:none}
  .nav{gap:14px}
  .nav a{font-size:11px;letter-spacing:.1em}
}
@media (max-width:560px){
  .top-in{height:62px}
  .brand span{display:none}
  h1{font-size:clamp(2.2rem,10.5vw,3.2rem)}
  .reel-frame{aspect-ratio:4/3.2}
  .people{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .rv{opacity:1;transform:none}
}