/* ============================================================
   展示站样式 —— 沿用概念原型视觉，零改动
   ============================================================ */

/* ---------- 滚动进度 ---------- */
#progress{
  position:fixed;top:0;left:0;height:2px;width:0;
  background:var(--accent);z-index:1000;
  box-shadow:0 0 12px rgba(232,69,44,.7);
}

/* ---------- 导航 ---------- */
header{
  position:fixed;top:0;left:0;right:0;z-index:900;
  display:flex;align-items:center;justify-content:space-between;
  padding:22px 40px;
  transition:background .5s var(--ease),backdrop-filter .5s var(--ease),padding .5s var(--ease);
}
header.solid{
  background:rgba(7,7,10,.72);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  padding:14px 40px;
  border-bottom:1px solid var(--line);
}
.brand{font-family:var(--serif);font-size:19px;letter-spacing:.22em;color:var(--text);}
.brand span{
  font-family:var(--sans);font-size:9px;letter-spacing:.3em;
  color:var(--dim);display:block;margin-top:3px;font-weight:400;
}
nav{display:flex;gap:34px;align-items:center;}
nav a{
  color:var(--muted);font-size:12.5px;letter-spacing:.16em;
  transition:color .35s var(--ease);position:relative;
}
nav a::after{
  content:'';position:absolute;left:0;bottom:-5px;width:0;height:1px;
  background:var(--accent);transition:width .4s var(--ease);
}
nav a:hover{color:var(--text);}
nav a:hover::after{width:100%;}

/* ---------- HERO ---------- */
.hero{position:relative;height:100svh;min-height:600px;display:flex;align-items:flex-end;overflow:hidden;}
.hero-media{position:absolute;inset:0;z-index:0;width:100%;height:100%;object-fit:cover;}
.hero-fallback{
  position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(58% 52% at 22% 32%, rgba(232,69,44,.42), transparent 62%),
    radial-gradient(52% 60% at 78% 42%, rgba(48,86,184,.30), transparent 62%),
    radial-gradient(44% 44% at 52% 86%, rgba(198,152,86,.20), transparent 64%),
    radial-gradient(30% 30% at 90% 15%, rgba(120,60,180,.22), transparent 66%),
    #07070a;
  animation:drift 26s var(--ease) infinite alternate;
}
@keyframes drift{
  0%{transform:scale(1.06) translate3d(0,0,0);}
  100%{transform:scale(1.18) translate3d(-2.5%,-1.5%,0);}
}
.hero::before{
  content:'';position:absolute;inset:0;z-index:1;
  background:linear-gradient(to top,var(--ink) 2%,rgba(7,7,10,.55) 38%,rgba(7,7,10,.25) 70%,rgba(7,7,10,.6) 100%);
}
.hero-inner{position:relative;z-index:2;width:100%;padding:0 40px 76px;}
.hero-eyebrow{font-size:10px;letter-spacing:.42em;color:var(--accent);text-transform:uppercase;margin-bottom:24px;opacity:0;animation:rise 1.1s var(--ease) .25s forwards;}
.hero-title{
  font-family:var(--serif);font-size:clamp(52px,11vw,142px);
  line-height:.94;font-weight:400;letter-spacing:.04em;
  opacity:0;animation:rise 1.3s var(--ease) .4s forwards;
}
.hero-title em{
  font-family:var(--sans);font-style:normal;display:block;
  font-size:clamp(11px,1.5vw,17px);letter-spacing:.5em;
  color:var(--muted);font-weight:300;margin-top:22px;
}
.hero-sub{
  margin-top:34px;max-width:520px;font-size:14.5px;color:#b6b0aa;
  font-weight:300;opacity:0;animation:rise 1.3s var(--ease) .6s forwards;
}
@keyframes rise{from{opacity:0;transform:translateY(26px);}to{opacity:1;transform:none;}}

.scroll-cue{
  position:absolute;left:40px;bottom:26px;z-index:3;
  display:flex;align-items:center;gap:12px;
  font-size:9.5px;letter-spacing:.3em;color:var(--dim);
  opacity:0;animation:rise 1.3s var(--ease) .9s forwards;
}
.scroll-cue i{display:block;width:52px;height:1px;background:var(--dim);position:relative;overflow:hidden;}
.scroll-cue i::after{content:'';position:absolute;inset:0;background:var(--accent);animation:sweep 2.4s var(--ease) infinite;}
@keyframes sweep{0%{transform:translateX(-100%);}60%,100%{transform:translateX(100%);}}

/* ---------- 声音开关 ---------- */
.sound{
  position:fixed;right:40px;bottom:34px;z-index:900;
  display:flex;align-items:center;gap:10px;
  background:rgba(15,15,20,.6);backdrop-filter:blur(10px);
  border:1px solid var(--line);border-radius:100px;
  padding:9px 16px 9px 12px;cursor:pointer;
  font-size:10px;letter-spacing:.22em;color:var(--muted);
  transition:border-color .35s var(--ease),color .35s var(--ease);
}
.sound:hover{border-color:rgba(232,69,44,.5);color:var(--text);}
.sound .bars{display:flex;align-items:flex-end;gap:2.5px;height:13px;}
.sound .bars b{display:block;width:2px;background:var(--dim);height:4px;transition:height .3s var(--ease),background .3s;}
.sound.on .bars b{background:var(--accent);animation:eq .9s ease-in-out infinite alternate;}
.sound.on .bars b:nth-child(2){animation-delay:.15s;}
.sound.on .bars b:nth-child(3){animation-delay:.3s;}
.sound.on .bars b:nth-child(4){animation-delay:.45s;}
@keyframes eq{from{height:4px;}to{height:13px;}}

/* ---------- 区块通用 ---------- */
.wrap{max-width:1440px;margin:0 auto;padding:0 40px;}
.sec-head{display:flex;align-items:baseline;gap:20px;margin-bottom:56px;}
.sec-num{font-family:var(--mono);font-size:11px;color:var(--accent);letter-spacing:.1em;}
.sec-title{font-family:var(--serif);font-size:clamp(26px,3.4vw,40px);font-weight:400;letter-spacing:.06em;}
.sec-title small{font-family:var(--sans);font-size:10px;letter-spacing:.34em;color:var(--dim);display:block;margin-top:10px;font-weight:300;}

/* ---------- 作品墙 ---------- */
.works{padding:140px 0 120px;}
.grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px;}
.card{
  position:relative;grid-column:span 2;aspect-ratio:16/10;
  border-radius:3px;overflow:hidden;cursor:pointer;background:var(--ink-2);
  transition:transform .6s var(--ease);
}
.card.wide{grid-column:span 4;aspect-ratio:16/7;}
.card.tall{grid-column:span 2;aspect-ratio:3/4;}
.card:hover{transform:translateY(-4px);}

.card-poster{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  filter:saturate(.5) brightness(.62);transform:scale(1.02);
  transition:filter .7s var(--ease),transform 1.4s var(--ease);
}
.card:hover .card-poster{filter:saturate(1.05) brightness(1);transform:scale(1.06);}
.card-preview{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  opacity:0;transition:opacity .5s var(--ease);
}
.card.playing .card-preview{opacity:1;}
.card.playing .card-poster{opacity:0;}

.plate{
  position:absolute;inset:0;
  background:
    radial-gradient(70% 70% at 30% 35%, var(--c1), transparent 65%),
    radial-gradient(60% 60% at 75% 70%, var(--c2), transparent 62%),
    #0b0b10;
  filter:saturate(.5) brightness(.62);
  transition:filter .7s var(--ease);
}
.card:hover .plate{filter:saturate(1.05) brightness(1);}

.card::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(to top,rgba(7,7,10,.85) 0%,rgba(7,7,10,.15) 45%,transparent 70%);
  z-index:1;
}
.card-meta{
  position:absolute;z-index:2;left:20px;right:20px;bottom:18px;
  display:flex;justify-content:space-between;align-items:flex-end;gap:14px;
}
.card-t{font-family:var(--serif);font-size:17px;letter-spacing:.06em;line-height:1.35;}
.card-t i{
  font-family:var(--sans);font-style:normal;display:block;
  font-size:9.5px;letter-spacing:.26em;color:var(--muted);margin-top:7px;font-weight:300;
}
.card-d{font-family:var(--mono);font-size:10px;color:var(--dim);white-space:nowrap;}
.play{
  position:absolute;z-index:3;top:50%;left:50%;transform:translate(-50%,-50%) scale(.85);
  width:52px;height:52px;border-radius:50%;
  border:1px solid rgba(232,230,225,.5);
  display:flex;align-items:center;justify-content:center;
  opacity:0;transition:opacity .45s var(--ease),transform .45s var(--ease);
  backdrop-filter:blur(4px);
}
.play::before{
  content:'';width:0;height:0;
  border-left:11px solid var(--text);border-top:7px solid transparent;border-bottom:7px solid transparent;
  margin-left:3px;
}
.card:hover .play{opacity:1;transform:translate(-50%,-50%) scale(1);}

/* ---------- 方法论 ---------- */
.process{padding:120px 0;background:var(--ink-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);}
.step{background:var(--ink-2);padding:44px 34px 46px;}
.step-n{font-family:var(--mono);font-size:36px;color:rgba(232,230,225,.09);line-height:1;margin-bottom:24px;letter-spacing:-.02em;}
.step h3{font-family:var(--serif);font-size:20px;font-weight:400;letter-spacing:.08em;margin-bottom:8px;}
.step h3 em{font-family:var(--sans);font-style:normal;font-size:9.5px;letter-spacing:.28em;color:var(--dim);display:block;margin-top:8px;}
.step p{font-size:13px;color:#9d978f;font-weight:300;}
.prompt{
  margin-top:22px;padding:16px 18px;background:#0a0a0e;
  border-left:2px solid var(--accent);border-radius:0 3px 3px 0;
  font-family:var(--mono);font-size:11px;line-height:1.9;color:#7f8a92;word-break:break-word;
}
.prompt b{color:var(--accent);font-weight:400;}

/* ---------- 关于 ---------- */
.about{padding:140px 0;}
.about-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:80px;align-items:start;}
.portrait{aspect-ratio:3/4;border-radius:3px;overflow:hidden;position:relative;background:#0d0d12;}
.portrait img{width:100%;height:100%;object-fit:cover;}
.about-body p{margin-bottom:22px;font-size:15px;color:#b0aaa4;font-weight:300;line-height:2;}
.about-body p.lead{font-family:var(--serif);font-size:22px;color:var(--text);line-height:1.9;letter-spacing:.03em;}
.facts{margin-top:38px;border-top:1px solid var(--line);}
.fact{display:flex;gap:24px;padding:15px 0;border-bottom:1px solid var(--line);}
.fact dt{width:92px;flex:none;font-size:10.5px;letter-spacing:.2em;color:var(--dim);padding-top:4px;}
.fact dd{font-size:13.5px;color:#b0aaa4;font-weight:300;}

/* ---------- 页脚 ---------- */
footer{padding:70px 0 54px;border-top:1px solid var(--line);}
.foot{display:flex;justify-content:space-between;align-items:flex-end;flex-wrap:wrap;gap:30px;}
.foot-cta{font-family:var(--serif);font-size:clamp(24px,3.4vw,40px);letter-spacing:.05em;line-height:1.4;}
.foot-cta a{color:var(--text);border-bottom:1px solid var(--accent);padding-bottom:4px;transition:color .35s var(--ease);}
.foot-cta a:hover{color:var(--accent);}
.foot-meta{font-size:11px;color:var(--dim);letter-spacing:.14em;text-align:right;line-height:2.1;}

/* ---------- 灯箱 ---------- */
.lightbox{
  position:fixed;inset:0;z-index:2000;background:rgba(4,4,6,.96);
  display:none;align-items:center;justify-content:center;padding:40px;
  opacity:0;transition:opacity .4s var(--ease);
}
.lightbox.open{display:flex;opacity:1;}
.lb-stage{width:100%;max-width:1100px;position:relative;}
.lb-video{width:100%;aspect-ratio:16/9;background:#000;border-radius:4px;display:block;}
.lb-info{margin-top:18px;display:flex;justify-content:space-between;align-items:flex-start;gap:24px;flex-wrap:wrap;}
.lb-title{font-family:var(--serif);font-size:22px;letter-spacing:.05em;}
.lb-title small{font-family:var(--sans);font-size:10px;letter-spacing:.28em;color:var(--dim);display:block;margin-top:8px;}
.lb-desc{max-width:560px;font-size:13px;color:#9d978f;font-weight:300;line-height:1.9;}
.lb-close{
  position:absolute;top:-34px;right:0;background:none;border:none;
  color:var(--muted);font-size:11px;letter-spacing:.24em;z-index:10;
}
.lb-close:hover{color:var(--accent);}
.lb-note{
  padding:60px 20px;text-align:center;color:var(--muted);font-size:12.5px;letter-spacing:.1em;
}

/* ---------- 空状态 ---------- */
.empty{
  padding:80px 40px;text-align:center;color:var(--dim);
  border:1px dashed var(--line-strong);border-radius:var(--radius);
  font-size:13px;letter-spacing:.1em;line-height:2;
}

/* ---------- 作品详情页 ---------- */
.work-page{padding:140px 0 100px;}
.work-stage{width:100%;aspect-ratio:16/9;background:#000;border-radius:4px;overflow:hidden;}
.work-stage video{width:100%;height:100%;object-fit:contain;}
.work-meta{margin-top:40px;display:grid;grid-template-columns:1fr 1.2fr;gap:60px;}

/* ---------- 响应式 ---------- */
@media(max-width:1024px){
  .grid{grid-template-columns:repeat(4,1fr);}
  .card,.card.tall{grid-column:span 2;}
  .card.wide{grid-column:span 4;}
  .steps{grid-template-columns:1fr;}
  .about-grid,.work-meta{grid-template-columns:1fr;gap:44px;}
  .portrait{max-width:340px;}
}
@media(max-width:720px){
  header{padding:16px 20px;}
  header.solid{padding:12px 20px;}
  nav{gap:18px;}
  nav a{font-size:11px;letter-spacing:.1em;}
  nav a.hide-sm{display:none;}
  .wrap,.hero-inner{padding-left:20px;padding-right:20px;}
  .scroll-cue{left:20px;}
  .sound{right:20px;bottom:20px;}
  .grid{grid-template-columns:1fr;gap:12px;}
  .card,.card.wide,.card.tall{grid-column:span 1;aspect-ratio:16/9;}
  .works,.about,.work-page{padding:88px 0;}
  .sec-head{margin-bottom:36px;}
  .foot{flex-direction:column;align-items:flex-start;}
  .foot-meta{text-align:left;}
  .lightbox{padding:16px;}
}