/* 光影 GUANGYING — guangying.icu */
:root{
  --bg:#08080a;
  --bg-soft:#101014;
  --fg:#e9e6df;
  --fg-dim:#8b8780;
  --line:rgba(233,230,223,.10);
  --pad:clamp(18px,5vw,64px);
  --gap:clamp(8px,1.2vw,18px);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--fg);overflow-x:hidden;
  font-family:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  line-height:1.7;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
img{display:block;max-width:100%}
::selection{background:rgba(233,230,223,.16)}
:focus-visible{outline:1px solid rgba(233,230,223,.55);outline-offset:4px}

/* 导航 */
.nav{
  position:fixed;inset:0 0 auto 0;z-index:60;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:calc(16px + env(safe-area-inset-top)) var(--pad) 16px;
  transition:background .5s var(--ease),backdrop-filter .5s var(--ease),border-color .5s var(--ease);
  border-bottom:1px solid transparent;
}
.nav.scrolled{
  background:rgba(8,8,10,.72);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom-color:var(--line);
}
.brand{font-size:13px;letter-spacing:.34em;text-transform:uppercase;opacity:.92}
.links{display:flex;gap:clamp(14px,2.6vw,30px);font-size:12.5px;letter-spacing:.14em}
.links a{color:var(--fg-dim);transition:color .35s var(--ease)}
.links a:hover{color:var(--fg)}

/* 开场 */
.hero{
  position:relative;min-height:100svh;
  display:flex;flex-direction:column;justify-content:flex-end;
  padding:0 var(--pad) clamp(40px,7vh,88px);overflow:hidden;isolation:isolate;
}
.hero-ph{
  position:absolute;inset:0;z-index:-2;
  background:
    radial-gradient(90% 75% at 24% 16%,#3f6579 0%,transparent 62%),
    radial-gradient(85% 80% at 82% 88%,#0b1116 0%,transparent 60%),
    linear-gradient(168deg,#101c26 0%,#070b0e 100%);
}
.hero-ph::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(120% 110% at 50% 40%,transparent 28%,rgba(0,0,0,.78) 100%);
}
.hero-ph::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.55'/%3E%3C/svg%3E");
  opacity:.2;mix-blend-mode:overlay;
}
.eyebrow{margin:0 0 clamp(14px,2.2vh,26px);font-size:10.5px;letter-spacing:.46em;text-transform:uppercase;color:var(--fg-dim)}
.hero h1{margin:0;font-size:clamp(46px,13vw,132px);font-weight:200;letter-spacing:.16em;line-height:1.05}
.sub{margin:clamp(16px,2.6vh,30px) 0 0;font-size:clamp(13px,1.5vw,15px);letter-spacing:.1em;color:var(--fg-dim)}
.cue{
  position:absolute;left:var(--pad);bottom:clamp(16px,3vh,30px);
  display:flex;align-items:center;gap:12px;font-size:10px;letter-spacing:.3em;text-transform:uppercase;color:var(--fg-dim);
}
.cue span{display:block;width:44px;height:1px;background:currentColor;transform-origin:left;animation:sweep 2.8s var(--ease) infinite}
@keyframes sweep{0%{transform:scaleX(.2);opacity:.3}50%{transform:scaleX(1);opacity:.9}100%{transform:scaleX(.2);opacity:.3}}

/* 段落 */
.sec{padding:clamp(72px,13vh,150px) var(--pad)}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:20px;margin-bottom:clamp(26px,4vh,48px)}
.sec-head h2{margin:0;font-size:clamp(20px,2.6vw,27px);font-weight:300;letter-spacing:.1em}
.sec-head p{margin:0;font-size:11px;letter-spacing:.24em;text-transform:uppercase;color:var(--fg-dim)}

/* 网格 */
.grid{columns:3;column-gap:var(--gap)}
.tile{
  display:block;width:100%;margin:0 0 var(--gap);break-inside:avoid;
  position:relative;overflow:hidden;text-align:left;background:var(--bg-soft);
}
.tile img{
  width:100%;height:auto;background:var(--bg-soft);
  transition:transform 1.1s var(--ease),opacity .6s var(--ease);
}
.cap{
  position:absolute;inset:auto 0 0 0;padding:clamp(14px,2vw,22px);
  display:flex;align-items:baseline;justify-content:space-between;gap:12px;
  font-size:12.5px;letter-spacing:.05em;
  background:linear-gradient(to top,rgba(0,0,0,.82),rgba(0,0,0,.25) 55%,transparent);
}
.cap em{font-style:normal;font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;color:rgba(233,230,223,.62);white-space:nowrap}
@media (hover:hover){
  .cap{opacity:0;transform:translateY(10px);transition:opacity .55s var(--ease),transform .55s var(--ease)}
  .tile:hover img,.tile:focus-visible img{transform:scale(1.035)}
  .tile:hover .cap,.tile:focus-visible .cap{opacity:1;transform:none}
}
@media (max-width:900px){.grid{columns:2}}
@media (max-width:600px){
  .grid{columns:1}
  .hero{min-height:92svh}
  .links{font-size:11.5px;letter-spacing:.1em}
  .brand{letter-spacing:.26em}
}

/* 空状态 */
.empty{
  columns:1;margin:0;padding:clamp(60px,14vh,140px) 0;text-align:center;
  color:var(--fg-dim);font-size:13px;letter-spacing:.2em;
}

/* 关于 / 联系 */
.about{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,80px);align-items:start}
.about p{margin:0 0 1.1em;font-size:clamp(13.5px,1.6vw,16px);color:rgba(233,230,223,.78);max-width:34em}
.about p:last-child{margin-bottom:0}
.meta-list{list-style:none;margin:0;padding:0;font-size:12.5px;letter-spacing:.06em}
.meta-list li{display:flex;justify-content:space-between;gap:16px;padding:14px 0;border-top:1px solid var(--line);color:var(--fg-dim)}
.meta-list li:last-child{border-bottom:1px solid var(--line)}
.meta-list b{color:var(--fg);font-weight:400}
@media (max-width:820px){.about{grid-template-columns:1fr}}

.contact{text-align:center;padding:clamp(80px,15vh,170px) var(--pad)}
.contact .k{font-size:10.5px;letter-spacing:.42em;text-transform:uppercase;color:var(--fg-dim);margin:0 0 clamp(18px,3vh,32px)}
.contact a{
  display:inline-block;font-size:clamp(22px,5.2vw,46px);font-weight:200;letter-spacing:.06em;
  border-bottom:1px solid transparent;padding-bottom:.12em;
  transition:border-color .45s var(--ease);
  word-break:break-all;
}
.contact a:hover{border-bottom-color:rgba(233,230,223,.5)}

footer{
  display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between;align-items:center;
  padding:26px var(--pad) calc(30px + env(safe-area-inset-bottom));
  border-top:1px solid var(--line);font-size:11px;letter-spacing:.16em;color:var(--fg-dim);
}

/* 大图查看 */
.lb{
  position:fixed;inset:0;z-index:100;display:grid;grid-template-rows:1fr auto;
  background:rgba(4,4,5,.96);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  opacity:0;visibility:hidden;transition:opacity .4s var(--ease),visibility .4s;
}
.lb.on{opacity:1;visibility:visible}
.lb-stage{position:relative;display:grid;place-items:center;padding:clamp(14px,3vw,44px);min-height:0}
.lb-img{max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain}
.lb-bar{
  display:flex;justify-content:space-between;gap:20px;
  padding:0 clamp(16px,3vw,44px) calc(18px + env(safe-area-inset-bottom));
  font-size:12px;letter-spacing:.1em;color:rgba(233,230,223,.72);
}
.lb-bar span:last-child{letter-spacing:.2em;color:var(--fg-dim);white-space:nowrap}
.lb-close{
  position:absolute;top:calc(14px + env(safe-area-inset-top));right:clamp(14px,3vw,32px);z-index:2;
  width:46px;height:46px;display:grid;place-items:center;font-size:19px;color:var(--fg-dim);
}
.lb-close:hover{color:var(--fg)}
.lb-prev,.lb-next{
  position:absolute;top:50%;transform:translateY(-50%);z-index:2;
  width:52px;height:52px;display:grid;place-items:center;font-size:20px;color:rgba(233,230,223,.55);
  transition:color .3s var(--ease),background .3s var(--ease);
}
.lb-prev:hover,.lb-next:hover{color:var(--fg);background:rgba(255,255,255,.05)}
.lb-prev{left:clamp(6px,1.4vw,18px)}
.lb-next{right:clamp(6px,1.4vw,18px)}
@media (max-width:600px){
  .lb-prev,.lb-next{display:none}
  .lb-stage{padding:56px 10px 10px}
}

/* 滚动淡入 */
.reveal{opacity:0;transform:translateY(22px);transition:opacity 1s var(--ease),transform 1s var(--ease)}
.reveal.in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
}