/* ============ 基础 ============ */
:root{
  --ui-brand: #30203f;
  --ui-focus: #dcd0ed;
  --ui-bg: rgba(24,16,32,.76);
  --ui-bg-hover: rgba(24,16,32,.92);
  --ui-border: rgba(255,255,255,.18);
  --ui-text: #fff;
  --ui-text-dim: rgba(255,255,255,.72);
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-t: env(safe-area-inset-top, 0px);
  --thumb: 60px;
  --ease: cubic-bezier(.22,.61,.36,1);
}
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
[hidden]{display:none!important}
html,body{height:100%;overflow:hidden;background:#000}
body{
  font:14px/1.5 -apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
  color:var(--ui-text);
  user-select:none;-webkit-user-select:none;
}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
button:disabled{opacity:.4;cursor:default}
button:focus-visible,a:focus-visible,canvas:focus-visible{outline:3px solid var(--ui-focus);outline-offset:4px;box-shadow:0 0 0 2px var(--ui-brand)}
.svg-sprite{position:absolute;width:0;height:0;overflow:hidden}
svg{display:block;width:100%;height:100%;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}

/* ============ 全景画布 ============ */
#pano{position:fixed;inset:0;background:#000;cursor:grab;touch-action:none}
#pano.is-dragging{cursor:grabbing}
#pano-canvas{display:block;width:100%;height:100%}
.hotspots{position:absolute;inset:0;pointer-events:none;overflow:hidden}

/* ============ 顶部 ============ */
.topbar{
  position:fixed;left:0;right:0;top:0;z-index:30;
  display:flex;align-items:flex-start;justify-content:space-between;
  padding:calc(14px + var(--safe-t)) max(16px,env(safe-area-inset-right)) 0 max(16px,env(safe-area-inset-left));
  pointer-events:none;
  background:linear-gradient(to bottom,rgba(0,0,0,.55),rgba(0,0,0,0));
}
.brand{
  display:flex;align-items:center;gap:10px;
  pointer-events:auto;text-decoration:none;color:#fff;
  max-width:60vw;
}
.brand-block{max-width:calc(100% - 62px);padding:10px 12px;background:var(--ui-bg);border:1px solid var(--ui-border);border-radius:4px;pointer-events:auto}
.return-site{display:inline-flex;align-items:center;gap:9px;min-height:44px;margin-top:5px;color:var(--ui-focus);font-size:13px;text-decoration:underline;text-underline-offset:4px}
.return-site:hover{color:#fff}
.brand-logo{height:34px;width:auto;display:none;filter:drop-shadow(0 2px 6px rgba(0,0,0,.5))}
.brand-logo.is-loaded{display:block}
.brand-name{
  font-size:15px;letter-spacing:.5px;line-height:1.35;
  text-shadow:0 1px 6px rgba(0,0,0,.7);
  white-space:normal;overflow-wrap:anywhere;
}
.scene-current{font-size:12px;color:var(--ui-text-dim);margin-top:5px;text-shadow:0 1px 4px #000}
.tools{display:flex;flex-direction:column;gap:8px;pointer-events:auto}
.tool{
  width:44px;height:44px;padding:12px;border-radius:50%;
  background:var(--ui-bg);border:1px solid var(--ui-border);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  color:#fff;transition:background .2s,transform .2s,color .2s;
}
.tool:hover{background:var(--ui-bg-hover)}
.tool:active{transform:scale(.92)}
.tool.is-active{background:var(--ui-brand);color:#fff;border-color:#fff}

/* ============ 底部缩略图 ============ */
.scene-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:20;
  padding:10px 0 calc(10px + var(--safe-b));
  background:linear-gradient(to top,rgba(0,0,0,.86) 0%,rgba(0,0,0,.58) 62%,rgba(0,0,0,0) 100%);
  transition:transform .35s var(--ease),opacity .35s;
}
.scene-bar.is-hidden{transform:translateY(110%);opacity:0;pointer-events:none}
.scene-track{
  display:flex;gap:9px;align-items:flex-start;
  width:max-content;max-width:100%;margin:auto;
  padding:0 max(16px,env(safe-area-inset-right)) 0 max(16px,env(safe-area-inset-left));overflow-x:auto;overscroll-behavior-x:contain;
  scrollbar-width:none;-ms-overflow-style:none;scroll-snap-type:x proximity;
}
.scene-track::-webkit-scrollbar{display:none}
.scene-item{
  flex:0 0 auto;width:var(--thumb);scroll-snap-align:center;
  display:flex;flex-direction:column;align-items:center;gap:5px;
  padding:0;transition:transform .2s;
}
.scene-item:active{transform:scale(.95)}
.scene-pic{
  position:relative;width:var(--thumb);height:var(--thumb);border-radius:5px;overflow:hidden;
  background:#222 center/cover no-repeat;
  border:2px solid transparent;box-shadow:0 2px 8px rgba(0,0,0,.4);
  transition:border-color .2s;
}
.scene-pic::after{
  content:"";position:absolute;inset:0;border-radius:3px;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.14)
}
.scene-item.is-active .scene-pic{border-color:#fff}
.scene-item.is-active .scene-pic::before{
  content:"";position:absolute;right:3px;top:3px;width:14px;height:14px;z-index:2;
  border-radius:50%;background:#fff;
  background-image:url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M20 6L9 17l-5-5' fill='none' stroke='%23111' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-size:9px 9px;background-position:center;background-repeat:no-repeat;
}
.scene-name{
  display:block;width:100%;
  font-size:11px;line-height:1.25;color:var(--ui-text-dim);
  text-align:center;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  text-shadow:0 1px 3px rgba(0,0,0,.9);
}
.scene-item.is-active .scene-name{color:#fff}

/* ============ 左下 / 右下 ============ */
.dock{position:fixed;bottom:calc(12px + var(--safe-b));z-index:25;display:flex;flex-direction:column;gap:12px;transition:bottom .35s var(--ease)}
.dock-left{left:max(16px,env(safe-area-inset-left))}
.dock-right{right:max(16px,env(safe-area-inset-right))}
.dock-btn{display:flex;flex-direction:column;align-items:center;gap:5px;color:var(--ui-text-dim)}
.dock-icon{
  width:34px;height:34px;padding:7px;border-radius:50%;
  background:var(--ui-bg);border:1px solid var(--ui-border);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);color:#fff;
  transition:background .2s,transform .2s;
}
.dock-btn:active .dock-icon{transform:scale(.92)}
.dock-btn:hover .dock-icon{background:var(--ui-bg-hover)}
.dock-text{font-size:11px;letter-spacing:.5px;text-shadow:0 1px 4px rgba(0,0,0,.8);white-space:nowrap}
.dock-btn.is-liked .dock-icon{color:#ff5a72;border-color:rgba(255,90,114,.5)}
.dock-btn.is-liked svg{fill:currentColor}

/* 底部条展开时，把左右按钮抬高，避免压住缩略图 */
body.scene-bar-open .dock{bottom:calc(var(--thumb) + 44px + var(--safe-b))}
/* 平板/桌面缩略图 */
@media (min-width:768px){
  :root{--thumb:64px}
}

/* ============ 指南针 ============ */
.compass{
  position:fixed;left:50%;bottom:calc(12px + var(--safe-b));z-index:10;
  width:96px;height:96px;margin-left:-48px;
  pointer-events:none;opacity:.85;
  transition:bottom .35s var(--ease);
}
body.scene-bar-open .compass{bottom:calc(var(--thumb) + 44px + var(--safe-b))}
.compass-ring{position:relative;width:100%;height:100%;transition:transform .08s linear}
.compass-ring svg{width:100%;height:100%;stroke:none;fill:none}
.compass-ring::before,.compass-ring::after{content:"";position:absolute;inset:6%;border-radius:50%;background:repeating-conic-gradient(#ffffff8c 0deg 1deg,transparent 1deg 5deg);-webkit-mask:radial-gradient(farthest-side,transparent calc(100% - 3px),#000 0);mask:radial-gradient(farthest-side,transparent calc(100% - 3px),#000 0)}
.compass-ring::after{background:repeating-conic-gradient(#ffffffe6 0deg 1.5deg,transparent 1.5deg 45deg);-webkit-mask:radial-gradient(farthest-side,transparent calc(100% - 6px),#000 0);mask:radial-gradient(farthest-side,transparent calc(100% - 6px),#000 0)}
.compass-ring text{
  fill:rgba(255,255,255,.92);font-size:12px;font-family:inherit;
  stroke:none;letter-spacing:1px;
}
.compass-ring text.cp-n{fill:#fff;font-size:13px}
.compass-text{
  position:absolute;left:0;right:0;top:50%;transform:translateY(-50%);text-align:center;
  font-size:12px;letter-spacing:2px;color:#fff;text-shadow:0 1px 4px rgba(0,0,0,.8);
}

/* ============ 加载 ============ */
.loading{
  position:fixed;inset:0;z-index:90;background:var(--ui-brand);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;
  transition:opacity .6s ease,visibility .6s;
}
.loading.is-done{opacity:0;visibility:hidden}
.loading-brand{font-size:17px;letter-spacing:2px;color:rgba(255,255,255,.9)}
.loading-bar{width:180px;height:2px;background:rgba(255,255,255,.16);border-radius:2px;overflow:hidden}
.loading-bar i{display:block;height:100%;width:0;background:var(--ui-focus);transition:width .25s ease}
.loading-num{font-size:12px;color:rgba(255,255,255,.55);letter-spacing:1px;font-variant-numeric:tabular-nums}
.loading-message{display:none;padding:0 24px;text-align:center;color:var(--ui-text-dim)}
#loading-retry{display:none}
.loading.is-error .loading-message{display:block}
.loading.is-error #loading-retry{display:inline-flex}
.loading.is-error .loading-bar,.loading.is-error .loading-num{display:none}
.retry-button{padding:6px 14px;border:1px solid rgba(255,255,255,.45);border-radius:18px;font-size:12px;white-space:nowrap}
.status{position:fixed;left:50%;top:calc(80px + var(--safe-t));transform:translateX(-50%);z-index:85;max-width:calc(100% - 48px);display:flex;align-items:center;gap:12px;padding:10px 16px;background:rgba(16,16,18,.9);border:1px solid var(--ui-border);border-radius:24px;font-size:12px;box-shadow:0 4px 20px #0005}

/* ============ 引导 ============ */
.guide{position:fixed;inset:0;z-index:60;display:flex;align-items:center;justify-content:center;pointer-events:none}
.guide[hidden]{display:none}
.guide-card{
  padding:16px 26px 14px;border-radius:10px;
  background:rgba(28,28,30,.62);border:1px solid rgba(255,255,255,.14);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  text-align:center;animation:guideIn .5s var(--ease);
}
@keyframes guideIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.guide-title{font-size:13px;color:rgba(255,255,255,.9);margin-bottom:12px;letter-spacing:1px}
.guide-row{display:flex;gap:34px;align-items:flex-end}
.guide-item{display:flex;flex-direction:column;align-items:center;gap:8px;font-size:11px;color:rgba(255,255,255,.7)}
.guide-drag{width:52px;height:26px;stroke:rgba(255,255,255,.9);stroke-width:1.6}
.guide-wheel{
  width:22px;height:36px;border:1.6px solid rgba(255,255,255,.9);border-radius:12px;position:relative;display:block
}
.guide-wheel::after{
  content:"";position:absolute;left:50%;top:7px;width:2px;height:8px;margin-left:-1px;border-radius:2px;
  background:rgba(255,255,255,.9);animation:wheel 1.6s ease-in-out infinite
}
@keyframes wheel{0%,100%{transform:translateY(0);opacity:.9}50%{transform:translateY(6px);opacity:.4}}

/* ============ 弹窗 ============ */
.modal{position:fixed;inset:0;z-index:80;display:flex;align-items:center;justify-content:center;padding:24px}
.modal[hidden]{display:none}
.modal-mask{position:absolute;inset:0;background:rgba(0,0,0,.72);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);animation:fadeIn .25s ease}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.modal-panel{
  position:relative;z-index:1;width:100%;max-width:620px;max-height:82vh;
  background:rgba(22,22,24,.96);border:1px solid rgba(255,255,255,.12);
  border-radius:14px;padding:34px 30px 30px;
  box-shadow:0 24px 70px rgba(0,0,0,.6);
  animation:panelIn .3s var(--ease);overflow:auto;
}
@keyframes panelIn{from{opacity:0;transform:translateY(14px) scale(.98)}to{opacity:1;transform:none}}
.modal-close{
  position:absolute;right:12px;top:12px;width:32px;height:32px;padding:8px;border-radius:50%;
  color:rgba(255,255,255,.7);background:rgba(255,255,255,.06);
}
.modal-close:hover{background:rgba(255,255,255,.14);color:#fff}
.about-title{font-size:17px;font-weight:600;letter-spacing:1px;margin-bottom:16px;padding-right:30px}
.about-body{font-size:13.5px;line-height:1.95;color:rgba(255,255,255,.78);white-space:pre-wrap;word-break:break-word;user-select:text;-webkit-user-select:text}
.about-body a{color:var(--ui-focus);text-decoration:underline;text-underline-offset:3px}

.video-panel{max-width:900px;padding:0;background:#000;border-color:rgba(255,255,255,.1);overflow:visible}
.video-panel video{display:block;width:100%;max-height:82vh;border-radius:14px;background:#000}
.video-panel .modal-close{z-index:2;background:rgba(0,0,0,.55)}

/* ============ 热点 ============ */
.hotspot{
  position:absolute;left:0;top:0;width:44px;height:44px;pointer-events:auto;
  transform:translate3d(-9999px,-9999px,0);
  will-change:transform;cursor:pointer;
}
.hotspot.is-hidden{display:none}
@keyframes hotspot-frames{to{background-position-y:var(--sprite-end)}}
.hotspot-icon{
  position:absolute;left:50%;top:50%;width:44px;height:44px;
  transform:translate(-50%,-50%);
  background-repeat:no-repeat;background-position:0 0;
  filter:drop-shadow(0 2px 6px rgba(0,0,0,.45));
}
.hotspot-label{
  position:absolute;left:50%;bottom:calc(100% + 2px);
  transform:translateX(-50%);
  padding:5px 8px;border-radius:5px;
  background:rgba(0,0,0,.5);color:#fff;
  font-size:12px;line-height:1.2;letter-spacing:2px;white-space:nowrap;
  text-shadow:0 1px 2px rgba(0,0,0,.4);
  transition:background .2s;
}
.hotspot:hover .hotspot-label{background:rgba(0,0,0,.72)}

/* 场景切换黑幕 */
.fade{
  position:fixed;inset:0;z-index:70;background:#000;
  opacity:0;pointer-events:none;transition:opacity .22s ease;
}
.fade.is-on{opacity:1}

/* 竖屏调整 */
@media (max-aspect-ratio:1/1){
  .topbar{padding-top:calc(10px + var(--safe-t))}
  .brand-name{font-size:13px;max-width:52vw}
  .tool{width:44px;height:44px;padding:12px}
  :root{--thumb:56px}
  .scene-bar{padding-bottom:calc(8px + var(--safe-b))}
  .compass{width:82px;height:82px;margin-left:-41px}
  .compass-text{font-size:11px}
  .about-panel{padding:28px 20px 22px}
  .about-body{font-size:13px}
}
/* 横屏手机：整体压缩，但保留场景条 */
@media (max-height:520px){
  :root{--thumb:46px}
  .scene-bar{padding:5px 0 calc(5px + var(--safe-b))}
  .scene-name{font-size:10px}
  .brand-name{font-size:12px}
  .tools{flex-direction:row}
  .tool{width:32px;height:32px;padding:8px}
  .compass{display:none}
  body.scene-bar-open .dock{bottom:calc(var(--thumb) + 38px + var(--safe-b))}
  .modal{padding:12px}
  .about-panel{max-height:calc(100dvh - 24px)}
  .guide-card{padding:10px 18px}
  .guide-title{margin-bottom:8px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;transition-duration:.01ms!important}
  .hotspot-icon{animation:none!important}
}