:root{
  --gold:#d9bc7f;
  --gold-soft:rgba(217,188,127,.62);
  --gold-dim:rgba(217,188,127,.22);
  --paper:#f0e8d8;
  --ink:#0a0b0c;
  --glass:rgba(13,14,15,.58);
  --serif:"Songti SC","STSong","Noto Serif SC","Source Han Serif SC","SimSun",serif;
  --kai:"Kaiti SC","STKaiti","KaiTi","STKaiti",var(--serif);
  --sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%;overflow:hidden;background:#08090a;color:var(--paper);font-family:var(--serif)}
body{overscroll-behavior:none}
button{font:inherit;color:inherit}
#stage{position:fixed;inset:0}
#stage canvas{display:block;width:100%;height:100%}
#app{position:fixed;inset:0;z-index:10;pointer-events:none}
#grain{position:fixed;inset:0;z-index:20;pointer-events:none;opacity:.055;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.86' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.9'/%3E%3C/svg%3E")}
#vignette{position:fixed;inset:0;z-index:5;pointer-events:none;
  background:
    linear-gradient(180deg,rgba(4,6,8,.52) 0%,rgba(4,6,8,0) 24%,rgba(4,6,8,0) 62%,rgba(4,6,8,.72) 100%),
    radial-gradient(125% 100% at 50% 42%,transparent 52%,rgba(3,5,7,.62) 100%),
    linear-gradient(90deg,rgba(4,6,8,.4),transparent 26%,transparent 76%,rgba(4,6,8,.36))}
#error{position:fixed;inset:0;z-index:90;display:none;place-items:center;background:#0b0c0d;color:#e5d7bc;
  font:14px/1.9 var(--sans);padding:40px;text-align:center}

/* ---------- 载入 ---------- */
#loader{position:fixed;inset:0;z-index:100;display:grid;place-items:center;background:#0a0b0c;
  transition:opacity 1.1s ease,visibility 1.1s}
#loader.done{opacity:0;visibility:hidden}
.loader-inner{text-align:center;transform:translateY(-2vh)}
.seal{width:82px;height:82px;margin:0 auto 26px;border:2px solid #b4462f;color:#e9d9bb;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  font-family:var(--kai);font-size:29px;line-height:1.02;letter-spacing:2px;
  box-shadow:0 0 0 1px rgba(180,70,47,.18),0 0 48px rgba(180,70,47,.14) inset;
  animation:sealIn 1.5s cubic-bezier(.19,1,.22,1) both}
@keyframes sealIn{from{opacity:0;transform:scale(.82) rotate(-3deg)}to{opacity:1;transform:scale(1) rotate(0)}}
.loader-line{width:170px;height:1px;margin:0 auto 18px;background:rgba(217,188,127,.16);overflow:hidden}
.loader-line i{display:block;width:42%;height:100%;background:linear-gradient(90deg,transparent,var(--gold),transparent);
  animation:load 1.5s ease-in-out infinite}
@keyframes load{0%{transform:translateX(-120%)}100%{transform:translateX(340%)}}
#loader p{margin:0;font:10px/1 var(--sans);letter-spacing:.5em;color:rgba(217,188,127,.55)}

/* ---------- 品牌 ---------- */
.brand{position:absolute;left:clamp(24px,4.4vw,64px);top:clamp(26px,5.6vh,58px);max-width:420px;
  pointer-events:none;animation:fadeUp 1.4s .5s cubic-bezier(.19,1,.22,1) both}
.eyebrow{display:flex;align-items:center;gap:12px;font:9.5px/1 var(--sans);letter-spacing:.34em;color:var(--gold-soft)}
.eyebrow .rule{display:inline-block;width:34px;height:1px;background:linear-gradient(90deg,var(--gold),transparent)}
.brand h1{margin:16px 0 8px;font-family:var(--kai);font-size:clamp(46px,5.3vw,72px);font-weight:400;
  letter-spacing:.2em;line-height:1.06;color:#f6efdf;text-shadow:0 4px 40px rgba(0,0,0,.6)}
.brand .en{font:9px/1 var(--sans);letter-spacing:.46em;color:rgba(240,232,216,.52)}
.brand .intro{margin:22px 0 0;font-size:12.5px;line-height:2.15;letter-spacing:.18em;color:rgba(240,232,216,.66);
  max-width:290px}
.ornament{display:flex;align-items:center;gap:8px;margin-top:24px;width:150px;opacity:.65}
.ornament span{flex:1;height:1px;background:linear-gradient(90deg,rgba(217,188,127,.7),transparent)}
.ornament span:first-child{background:linear-gradient(90deg,transparent,rgba(217,188,127,.7))}
.ornament i{width:5px;height:5px;border:1px solid var(--gold);transform:rotate(45deg)}
.chapter{position:absolute;top:clamp(30px,5.8vh,62px);left:50%;transform:translateX(-50%);
  font:10px/1 var(--sans);letter-spacing:.34em;color:rgba(240,232,216,.42);pointer-events:none;
  animation:fadeIn 1.6s 1s both}
.chapter em{color:var(--gold-dim);font-style:normal;margin:0 6px}

/* ---------- 视角 ---------- */
.views{position:absolute;right:clamp(22px,3.4vw,52px);top:clamp(28px,5.5vh,58px);display:flex;flex-direction:column;
  gap:7px;pointer-events:auto;animation:fadeIn 1.4s .9s both}
.nav-cap{text-align:right;font:9px/1 var(--sans);letter-spacing:.42em;color:var(--gold-soft);margin-bottom:8px}
.view-btn{position:relative;appearance:none;border:1px solid rgba(217,188,127,.15);border-right:0;
  background:rgba(12,13,14,.34);backdrop-filter:blur(9px);-webkit-backdrop-filter:blur(9px);
  width:132px;padding:9px 16px 9px 18px;display:flex;align-items:baseline;justify-content:space-between;
  gap:8px;cursor:pointer;transition:background .35s,border-color .35s,color .35s;text-align:left}
.view-btn::before{content:"";position:absolute;left:-1px;top:50%;width:1px;height:0;background:var(--gold);
  transform:translateY(-50%);transition:height .35s cubic-bezier(.19,1,.22,1)}
.view-btn span{font-size:13px;letter-spacing:.2em;color:rgba(240,232,216,.82);transition:color .35s}
.view-btn small{font:8px/1 var(--sans);letter-spacing:.18em;color:rgba(240,232,216,.3)}
.view-btn:hover{background:rgba(30,26,20,.55);border-color:rgba(217,188,127,.38)}
.view-btn:hover::before{height:52%}
.view-btn.active{background:linear-gradient(90deg,rgba(100,75,35,.46),rgba(20,18,15,.4));
  border-color:rgba(217,188,127,.5)}
.view-btn.active::before{height:100%}
.view-btn.active span{color:#fff5e0}
.view-btn.active small{color:var(--gold-soft)}

/* ---------- 数据 ---------- */
.facts{position:absolute;left:clamp(24px,4.4vw,64px);bottom:clamp(30px,6vh,56px);display:flex;gap:clamp(22px,3.4vw,50px);
  pointer-events:none;animation:fadeUp 1.4s 1.1s cubic-bezier(.19,1,.22,1) both}
.fact{position:relative;padding-top:13px;border-top:1px solid rgba(217,188,127,.24);min-width:96px}
.fact::before{content:"";position:absolute;top:-1px;left:0;width:18px;height:1px;background:var(--gold)}
.fact .k{display:block;font:9px/1 var(--sans);letter-spacing:.32em;color:rgba(217,188,127,.62);margin-bottom:8px}
.fact .v{display:block;font-size:11px;letter-spacing:.14em;color:rgba(240,232,216,.55);margin-bottom:5px}
.fact b{font:400 17px/1.2 var(--serif);letter-spacing:.08em;color:#efe5d1}
.fact b i{font-style:normal;font-size:10px;color:rgba(240,232,216,.5);margin-left:2px}

/* ---------- 控制 ---------- */
.controls{position:absolute;right:clamp(22px,3.4vw,52px);bottom:clamp(28px,5.8vh,54px);
  display:flex;gap:2px;pointer-events:auto;animation:fadeIn 1.4s 1.3s both}
.ctl{appearance:none;border:0;background:rgba(12,13,14,.44);backdrop-filter:blur(9px);-webkit-backdrop-filter:blur(9px);
  padding:10px 12px;font:10.5px/1 var(--sans);letter-spacing:.16em;color:rgba(240,232,216,.6);cursor:pointer;
  border-top:1px solid rgba(217,188,127,.16);transition:color .3s,background .3s,border-color .3s;white-space:nowrap}
.ctl .ico{color:var(--gold-soft);margin-right:6px;font-size:11px;display:inline-block;transition:transform .4s}
.ctl:hover{color:#fff3dc;background:rgba(35,29,21,.62);border-top-color:var(--gold)}
.ctl:hover .ico{transform:rotate(45deg)}
.ctl.active{color:#f5e6c6;border-top-color:var(--gold);background:rgba(48,38,24,.55)}
.ctl.active .ico{color:var(--gold)}
.hint{position:absolute;left:50%;bottom:clamp(30px,6vh,54px);transform:translateX(-50%);
  font:9.5px/1 var(--sans);letter-spacing:.26em;color:rgba(240,232,216,.34);pointer-events:none;
  animation:fadeIn 1.6s 1.6s both;white-space:nowrap}
.hint i{display:inline-block;width:1px;height:8px;background:rgba(217,188,127,.22);margin:0 12px;vertical-align:-1px}
.compass{position:absolute;left:clamp(24px,4.4vw,64px);top:50%;transform:translateY(-50%);
  display:flex;flex-direction:column;align-items:center;gap:9px;pointer-events:none;opacity:.5;
  animation:fadeIn 1.6s 1.5s both}
.compass span{font-family:var(--kai);font-size:12px;color:rgba(240,232,216,.8)}
.compass i{width:1px;height:34px;background:linear-gradient(180deg,var(--gold-soft),transparent)}

/* ---------- 标注 ---------- */
#hotspots{position:fixed;inset:0;z-index:8;pointer-events:none;transition:opacity .5s}
#hotspots.off{opacity:0}
.hotspot{position:absolute;transform:translate(-50%,-50%);display:flex;align-items:center;gap:8px;
  pointer-events:auto;cursor:pointer;white-space:nowrap;transition:opacity .35s;
  appearance:none;border:0;background:transparent;padding:0;font:inherit;color:inherit}
.hotspot .dot{position:relative;width:9px;height:9px;flex:0 0 auto;border:1px solid rgba(255,244,218,.9);
  border-radius:50%;background:rgba(217,188,127,.28);box-shadow:0 0 0 1px rgba(10,12,14,.5)}
.hotspot .dot::after{content:"";position:absolute;inset:-5px;border:1px solid rgba(217,188,127,.4);border-radius:50%;
  animation:pulse 2.6s ease-out infinite}
@keyframes pulse{0%{transform:scale(.6);opacity:.9}70%,100%{transform:scale(1.35);opacity:0}}
.hotspot .label{font:10px/1 var(--sans);letter-spacing:.22em;color:rgba(255,247,231,.88);
  padding:6px 9px;background:rgba(10,11,12,.48);border:1px solid rgba(217,188,127,.22);
  backdrop-filter:blur(5px);-webkit-backdrop-filter:blur(5px);opacity:0;transform:translateX(-4px);
  transition:opacity .3s,transform .3s,background .3s}
.hotspot:hover .label,.hotspot.open .label{opacity:1;transform:translateX(0);background:rgba(35,28,18,.72)}
.hotspot:hover .dot{background:var(--gold);box-shadow:0 0 16px rgba(217,188,127,.7)}
.hotspot.hidden{opacity:0;pointer-events:none}

/* ---------- 信息卡 ---------- */
.card{position:absolute;left:clamp(24px,4.4vw,64px);bottom:clamp(126px,19vh,176px);width:min(374px,calc(100vw - 48px));
  padding:28px 30px 26px;background:linear-gradient(145deg,rgba(20,19,17,.88),rgba(9,10,11,.82));
  border:1px solid rgba(217,188,127,.26);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  box-shadow:0 28px 70px rgba(0,0,0,.5),0 0 0 1px rgba(0,0,0,.4) inset;
  pointer-events:auto;opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity .45s,transform .45s cubic-bezier(.19,1,.22,1),visibility .45s}
.card::before{content:"";position:absolute;left:-1px;top:-1px;width:34px;height:1px;background:var(--gold)}
.card::after{content:"";position:absolute;left:-1px;top:-1px;width:1px;height:34px;background:var(--gold)}
.card.open{opacity:1;visibility:visible;transform:translateY(0)}
.card-kicker{font:9px/1 var(--sans);letter-spacing:.38em;color:var(--gold-soft);margin-bottom:13px}
.card h2{margin:0;font-family:var(--kai);font-size:29px;font-weight:400;letter-spacing:.14em;color:#f7efdd}
.card-rule{width:100%;height:1px;margin:18px 0 15px;background:linear-gradient(90deg,rgba(217,188,127,.4),transparent)}
.card p{margin:0;font-size:12.5px;line-height:2.05;letter-spacing:.08em;color:rgba(240,232,216,.7);text-align:justify}
.card-facts{display:grid;grid-template-columns:1fr 1fr;gap:12px 16px;margin:20px 0 0;padding:16px 0 0;
  border-top:1px solid rgba(217,188,127,.14)}
.card-facts div{display:flex;flex-direction:column;gap:6px}
.card-facts dt{font:9px/1 var(--sans);letter-spacing:.22em;color:rgba(217,188,127,.55)}
.card-facts dd{margin:0;font-size:12px;letter-spacing:.08em;color:rgba(240,232,216,.85)}
.card-close{position:absolute;right:13px;top:13px;width:28px;height:28px;border:0;background:transparent;
  color:rgba(240,232,216,.42);font:18px/1 var(--sans);cursor:pointer;transition:color .3s,transform .3s}
.card-close:hover{color:var(--gold);transform:rotate(90deg)}

@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}

/* ---------- 响应式 ---------- */
@media(max-width:1100px){
  .chapter{display:none}
  .hint{display:none}
  .facts .fact:nth-child(3){display:none}
}
@media(max-width:820px){
  .brand{max-width:300px;top:24px;left:22px}
  .brand h1{font-size:46px;margin:13px 0 7px}
  .brand .intro{display:none}
  .brand .en{font-size:8px}
  .ornament{display:none}
  .views{top:auto;bottom:92px;right:16px;flex-direction:row;gap:5px;flex-wrap:wrap;justify-content:flex-end;max-width:calc(100vw - 32px)}
  .nav-cap{display:none}
  .view-btn{width:auto;padding:8px 11px;border-right:1px solid rgba(217,188,127,.15)}
  .view-btn small{display:none}
  .view-btn span{font-size:11.5px;letter-spacing:.14em}
  .view-btn::before{display:none}
  .facts{left:22px;bottom:24px;gap:20px}
  .fact{min-width:72px;padding-top:10px}
  .fact .v{display:none}
  .fact b{font-size:14px}
  .fact .k{font-size:8px}
  .controls{right:16px;bottom:24px;flex-wrap:wrap;justify-content:flex-end;max-width:58vw}
  .ctl{padding:8px 9px;font-size:9.5px;letter-spacing:.08em}
  .ctl .ico{margin-right:3px}
  .compass{display:none}
  .card{left:16px;right:16px;bottom:auto;top:50%;width:auto;transform:translateY(calc(-50% + 14px));max-height:62vh;overflow:auto}
  .card.open{transform:translateY(-50%)}
  .hotspot .label{font-size:9px;letter-spacing:.12em}
}
@media(max-width:520px){
  .brand h1{font-size:40px;letter-spacing:.16em}
  .brand .eyebrow{font-size:8px;letter-spacing:.26em}
  .fact:nth-child(2){display:none}
  .controls .ctl span:not(.ico){display:none}
  .ctl{padding:9px 10px}
  .ctl .ico{font-size:14px;margin:0}
  .views{bottom:84px}
}
@media(prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}