/* DJI Air 3S · 3D 拆解可视化 */
*{margin:0;padding:0;box-sizing:border-box}
:root{
  --cyan:#22d3ee; --cyan-dim:#0e7490; --violet:#8b5cf6; --amber:#fbbf24;
  --bg0:#04070d; --bg1:#0a1526; --line:rgba(34,211,238,.22);
  --glass:rgba(9,18,32,.72); --text:#cfe6f5; --muted:#6f8ca6;
}
html,body{height:100%;overflow:hidden;background:var(--bg0)}
body{
  font-family:"HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  color:var(--text);-webkit-font-smoothing:antialiased;
  background:radial-gradient(1200px 800px at 50% 42%,#0d1f36 0%,#070d17 45%,#03050a 100%);
}
#app{position:fixed;inset:0}
#scene{position:absolute;inset:0;display:block;outline:none}

/* 背景网格光晕 */
.bg-grid{
  position:absolute;inset:0;pointer-events:none;opacity:.35;
  background-image:linear-gradient(rgba(34,211,238,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(34,211,238,.05) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 45%,#000 0%,transparent 72%);
  -webkit-mask-image:radial-gradient(circle at 50% 45%,#000 0%,transparent 72%);
}
.vignette{position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(circle at 50% 45%,transparent 40%,rgba(2,4,8,.85) 100%)}

/* 顶栏 */
header{
  position:absolute;top:0;left:0;right:0;padding:20px 28px 0;
  display:flex;justify-content:space-between;align-items:flex-start;
  pointer-events:none;z-index:5;
}
.brand{display:flex;flex-direction:column;gap:6px}
.brand .kicker{font-size:11px;letter-spacing:.32em;color:var(--cyan);opacity:.85}
.brand h1{
  font-size:26px;font-weight:700;letter-spacing:.06em;line-height:1.15;
  background:linear-gradient(90deg,#eafcff 10%,var(--cyan) 55%,var(--violet) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 0 18px rgba(34,211,238,.35));
}
.brand .sub{font-size:12px;color:var(--muted);letter-spacing:.08em}
.status{display:flex;gap:8px;align-items:center;font-size:11px;color:var(--muted);
  letter-spacing:.14em;padding:8px 12px;border:1px solid var(--line);border-radius:999px;
  background:rgba(8,16,28,.55);backdrop-filter:blur(8px)}
.dot{width:6px;height:6px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 10px var(--cyan);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}

/* 通用玻璃面板 */
.panel{
  position:absolute;background:var(--glass);
  border:1px solid var(--line);border-radius:14px;
  backdrop-filter:blur(16px) saturate(1.2);
  box-shadow:0 18px 50px rgba(0,0,0,.55),inset 0 1px 0 rgba(255,255,255,.05);
  z-index:6;
}

/* 左侧部件清单 */
#parts-panel{left:24px;top:118px;width:238px;padding:14px}
.panel-title{font-size:11px;letter-spacing:.26em;color:var(--cyan);opacity:.9;
  padding:0 4px 10px;display:flex;justify-content:space-between;align-items:center}
.panel-title span{color:var(--muted);letter-spacing:.05em}
#part-list{display:flex;flex-direction:column;gap:5px;max-height:52vh;overflow-y:auto;
  scrollbar-width:thin;scrollbar-color:rgba(34,211,238,.3) transparent}
.part-item{
  display:flex;align-items:center;gap:9px;padding:9px 10px;border-radius:9px;
  cursor:pointer;border:1px solid transparent;transition:.22s;position:relative;
  background:rgba(255,255,255,.015);
}
.part-item:hover{background:rgba(34,211,238,.09);border-color:rgba(34,211,238,.3);transform:translateX(2px)}
.part-item.active{background:rgba(34,211,238,.14);border-color:rgba(34,211,238,.55);
  box-shadow:0 0 18px rgba(34,211,238,.16) inset}
.part-item .idx{font-size:10px;color:var(--muted);width:16px;flex:none;font-variant-numeric:tabular-nums}
.part-item.active .idx{color:var(--cyan)}
.part-item .nm{font-size:12.5px;letter-spacing:.02em}
.part-item .bar{position:absolute;left:0;top:18%;bottom:18%;width:2px;border-radius:2px;
  background:var(--cyan);opacity:0;transition:.22s}
.part-item.active .bar{opacity:1}

/* 右侧详情 */
#detail-panel{right:24px;top:118px;width:300px;padding:16px 16px 18px}
.detail-empty{color:var(--muted);font-size:12.5px;line-height:1.9}
.detail-empty b{color:var(--cyan);font-weight:500}
.d-name{font-size:17px;font-weight:600;letter-spacing:.04em;margin-bottom:2px}
.d-en{font-size:10.5px;letter-spacing:.2em;color:var(--cyan);opacity:.8;text-transform:uppercase}
.d-desc{font-size:12px;color:#9db8cd;line-height:1.85;margin-top:10px;
  padding-top:10px;border-top:1px dashed rgba(34,211,238,.18)}
.specs{margin-top:12px;display:flex;flex-direction:column;gap:0}
.spec{display:flex;justify-content:space-between;gap:10px;font-size:12px;
  padding:7px 0;border-bottom:1px solid rgba(255,255,255,.045)}
.spec:last-child{border-bottom:none}
.spec .k{color:var(--muted);flex:none}
.spec .v{color:#dff2ff;text-align:right;font-variant-numeric:tabular-nums}
.spec .v em{color:var(--amber);font-style:normal}

/* 底部操作引导 */
#hint{
  position:absolute;left:50%;bottom:20px;transform:translateX(-50%);
  display:flex;gap:20px;align-items:center;padding:10px 20px;
  border:1px solid var(--line);border-radius:999px;background:rgba(8,16,28,.6);
  backdrop-filter:blur(10px);font-size:11.5px;color:var(--muted);z-index:6;white-space:nowrap;
}
#hint .k{color:var(--cyan);font-weight:600}
#hint i{width:1px;height:14px;background:var(--line)}

/* 右上工具条 */
#toolbar{position:absolute;right:24px;bottom:20px;display:flex;gap:8px;z-index:6}
.btn{
  padding:9px 15px;border-radius:9px;font-size:12px;cursor:pointer;letter-spacing:.06em;
  border:1px solid var(--line);background:rgba(9,18,32,.75);color:var(--text);
  backdrop-filter:blur(10px);transition:.2s;
}
.btn:hover{border-color:var(--cyan);color:#eafcff;box-shadow:0 0 20px rgba(34,211,238,.22);
  transform:translateY(-1px)}
.btn.primary{background:linear-gradient(135deg,rgba(34,211,238,.2),rgba(139,92,246,.18));
  border-color:rgba(34,211,238,.5)}

/* 3D 标注 */
#labels{position:absolute;inset:0;pointer-events:none;overflow:hidden;z-index:4}
.tag{
  position:absolute;transform:translate(-50%,-50%);pointer-events:none;
  font-size:11px;letter-spacing:.06em;white-space:nowrap;opacity:0;
  transition:opacity .25s;color:#dff7ff;
  padding:3px 9px;border-radius:6px;
  background:rgba(6,14,26,.82);border:1px solid rgba(34,211,238,.45);
  box-shadow:0 0 16px rgba(34,211,238,.25);
}
.tag.on{opacity:1}
.tag b{color:var(--cyan);font-weight:600}
.leader{position:absolute;width:1px;background:linear-gradient(to bottom,rgba(34,211,238,.7),transparent);
  transform-origin:top;pointer-events:none;opacity:0;transition:opacity .25s}
.leader.on{opacity:1}

/* 载入 */
#loader{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  background:var(--bg0);z-index:20;transition:opacity .6s;flex-direction:column;gap:16px}
#loader.done{opacity:0;pointer-events:none}
.spin{width:34px;height:34px;border-radius:50%;border:2px solid rgba(34,211,238,.15);
  border-top-color:var(--cyan);animation:rot .9s linear infinite}
@keyframes rot{to{transform:rotate(360deg)}}
#loader p{font-size:11px;letter-spacing:.3em;color:var(--muted)}

/* 部件点亮数值 */
.hud{position:absolute;left:24px;bottom:20px;font-size:10px;letter-spacing:.16em;
  color:var(--muted);line-height:1.9;z-index:6}
.hud b{color:var(--cyan);font-weight:600;font-variant-numeric:tabular-nums}

@media (max-width:1080px){
  #parts-panel{width:200px;top:104px;left:12px}
  #detail-panel{width:250px;top:104px;right:12px}
  header{padding:14px 16px 0}
  .brand h1{font-size:20px}
  #hint{display:none}
  .hud{display:none}
  #toolbar{right:12px;bottom:12px}
}
@media (max-width:760px){
  #detail-panel{display:none}
  #parts-panel{width:calc(100% - 24px);left:12px;top:auto;bottom:60px;max-height:34vh}
  #part-list{max-height:26vh;flex-direction:row;flex-wrap:wrap}
  .part-item{flex:1 1 46%}
}