/* =========================================================
   花蓮縣英語教育資源中心｜英語教材 — 前台樣式
   活潑 × 學術：米色筆記紙底、海岸藍主色、珊瑚/薑黃/綠松點綴
   ========================================================= */
:root{
  --ink:#1d3557;         /* 深海藍：文字與主色 */
  --ink-2:#36507a;
  --muted:#6b7a90;
  --paper:#fbf6ec;       /* 米色紙 */
  --card:#ffffff;
  --line:#eadfc8;
  --grid:rgba(29,53,87,.05);
  --coral:#e76f51;
  --sun:#f2b134;
  --teal:#2a9d8f;
  --sky:#5fa8d3;
  --shadow:0 1px 0 rgba(29,53,87,.06), 0 10px 30px -12px rgba(29,53,87,.25);
  --radius:20px;
  --topbar:68px;
  --font-en:"Fredoka", "Noto Sans TC", system-ui, sans-serif;
  --font:"Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0}
body{
  font-family:var(--font);
  color:var(--ink);
  background-color:var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size:28px 28px;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}
a{color:inherit}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none;-webkit-tap-highlight-color:transparent}
kbd{font-family:var(--font-en);font-size:.8em;background:#fff;border:1px solid var(--line);border-bottom-width:2px;border-radius:6px;padding:0 .4em}

/* ---------- Topbar ---------- */
.topbar{
  position:sticky;top:0;z-index:40;
  height:var(--topbar);
  display:flex;align-items:center;gap:14px;
  padding:0 20px;
  background:var(--ink);
  color:#fff;
}
.topbar-wave{position:absolute;left:0;right:0;bottom:-10px;width:100%;height:12px;fill:var(--ink);pointer-events:none}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;min-width:0;flex:1}
.brand-badge{display:flex;gap:3px;flex-shrink:0}
.brand-badge span{
  width:26px;height:30px;border-radius:8px;display:grid;place-items:center;
  font:700 18px/1 var(--font-en);color:var(--ink);
}
.brand-badge span:nth-child(1){background:var(--sun);transform:rotate(-8deg)}
.brand-badge span:nth-child(2){background:#fff;transform:translateY(-3px)}
.brand-badge span:nth-child(3){background:var(--coral);color:#fff;transform:rotate(7deg)}
.brand-text{display:flex;flex-direction:column;line-height:1.2;min-width:0}
.brand-text small{font-size:12.5px;opacity:.75;letter-spacing:.06em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand-text strong{font-size:19px;font-weight:900;letter-spacing:.04em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.home-btn{
  display:inline-flex;align-items:center;gap:6px;flex-shrink:0;
  padding:9px 16px;border-radius:999px;text-decoration:none;font-weight:700;font-size:14.5px;
  background:var(--sun);color:var(--ink);
  box-shadow:0 3px 0 #c88a14;
  transition:transform .15s, box-shadow .15s;
}
.home-btn:hover{transform:translateY(-1px);box-shadow:0 4px 0 #c88a14}
.home-btn:active{transform:translateY(2px);box-shadow:0 1px 0 #c88a14}
.icon-btn{width:40px;height:40px;border-radius:12px;display:grid;place-items:center}
.menu-toggle{display:none;color:#fff;background:rgba(255,255,255,.12)}

/* ---------- Layout ---------- */
.layout{
  display:grid;grid-template-columns:300px minmax(0,1fr);
  gap:28px;width:100%;margin:0;padding:30px 28px 10px;
}

/* ---------- Sidebar / TOC ---------- */
.sidebar{
  position:sticky;top:calc(var(--topbar) + 26px);
  align-self:start;
  max-height:calc(100vh - var(--topbar) - 50px);
  display:flex;flex-direction:column;
  background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);
  border:1px solid var(--line);
  overflow:hidden;
}
.sidebar-head{display:flex;align-items:center;gap:10px;padding:16px 18px 12px;border-bottom:2px dashed var(--line)}
.sidebar-title{font:600 17px var(--font-en);letter-spacing:.02em}
.sidebar-count{margin-left:auto;font-size:13px;color:var(--muted);background:var(--paper);padding:2px 10px;border-radius:999px}
.sidebar-close{display:none}
.toc{overflow-y:auto;padding:8px 10px 14px;flex:1;overscroll-behavior:contain}
.toc-group{--c:var(--coral);margin-top:8px}
.toc-group.g1{--c:var(--teal)}
.toc-group.g2{--c:var(--sun)}
.toc-group.g3{--c:var(--sky)}
.toc-cat{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--ink-2);padding:8px 8px 6px;letter-spacing:.04em}
.toc-dot{width:10px;height:10px;border-radius:3px;background:var(--c);transform:rotate(45deg)}
.toc ol{list-style:none;margin:0;padding:0}
.toc-item{
  width:100%;display:flex;align-items:center;gap:10px;text-align:left;
  padding:7px 8px;border-radius:12px;position:relative;
  transition:background .15s;
}
.toc-item:hover{background:var(--paper)}
.toc-num{
  flex-shrink:0;width:28px;height:28px;border-radius:9px;display:grid;place-items:center;
  font:600 14px var(--font-en);background:var(--paper);color:var(--ink-2);border:1.5px solid var(--line);
}
.toc-thumb{width:34px;height:44px;object-fit:cover;object-position:top;border-radius:5px;border:1px solid var(--line);flex-shrink:0;background:#fff}
.toc-name{flex:1;min-width:0;font-size:14.5px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.toc-audio{color:var(--teal);flex-shrink:0;opacity:.8}
.toc-item.active{background:color-mix(in srgb, var(--c) 14%, #fff)}
.toc-item.active .toc-num{background:var(--c);border-color:var(--c);color:#fff}
.toc-item.active .toc-name{font-weight:700}
.admin-link{display:block;padding:12px 18px;font-size:13px;color:var(--muted);text-decoration:none;border-top:1px solid var(--line)}
.admin-link:hover{color:var(--ink)}
.scrim{display:none}

/* ---------- Stage ---------- */
.stage-wrap{min-width:0;display:flex;flex-direction:column}
.stage-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:14px}
.chip{
  font-size:13px;font-weight:700;letter-spacing:.04em;
  padding:5px 12px;border-radius:999px;background:var(--teal);color:#fff;
}
.chip:empty{display:none}
.page-title{margin:0;font:700 clamp(22px,2.6vw,30px)/1.2 var(--font-en);letter-spacing:.01em;min-width:0}
.head-right{margin-left:auto;display:flex;align-items:center;gap:14px}
.page-counter{font:500 16px var(--font-en);color:var(--muted);white-space:nowrap}
.page-counter b{font-size:24px;color:var(--coral);font-weight:700}

/* 縮放工具列 */
.zoom-tools{display:flex;align-items:center;gap:4px;background:var(--card);border:1.5px solid var(--line);border-radius:999px;padding:4px;box-shadow:var(--shadow)}
.zoom-tools[hidden]{display:none}
.zt-btn{height:36px;min-width:36px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;gap:6px;color:var(--ink);transition:background .15s,color .15s}
.zt-btn:hover{background:var(--paper)}
.zt-btn:disabled{opacity:.3;pointer-events:none}
.zt-level{min-width:58px;height:36px;border-radius:999px;font:600 14.5px var(--font-en);color:var(--ink)}
.zt-level:hover{background:var(--paper)}
.zt-sep{width:1px;height:22px;background:var(--line);margin:0 4px}
.zt-lens{padding:0 14px 0 10px;font-size:14px;font-weight:700}
.zt-lens[aria-pressed="true"]{background:var(--ink);color:#fff}

.zoom-box{position:relative;line-height:0;cursor:zoom-in}
.zoom-box.zoomed{overflow:hidden;cursor:grab;border-radius:6px}
.zoom-box.grabbing{cursor:grabbing}
.zoom-box.lens-on{cursor:zoom-in}
.zoom-inner{transform-origin:0 0}
.lens{
  position:fixed;z-index:70;width:220px;height:220px;border-radius:50%;pointer-events:none;display:none;
  background-color:#fff;background-repeat:no-repeat;
  border:4px solid #fff;box-shadow:0 0 0 3px var(--ink),0 16px 34px -8px rgba(29,53,87,.55);
}
.lens::after{
  content:attr(data-mag);position:absolute;left:50%;bottom:10px;transform:translateX(-50%);
  background:var(--ink);color:#fff;font:600 12px/1 var(--font-en);padding:4px 9px;border-radius:999px;
}

.stage{position:relative;display:flex;align-items:center;gap:16px}
.slide-viewport{
  flex:1;min-width:0;display:flex;flex-direction:column;align-items:center;
  padding:10px 0 4px;touch-action:pan-y;
}

/* ---------- 書本 ---------- */
.book{position:relative;perspective:2400px;will-change:transform}
.leaf{
  position:absolute;top:0;width:50%;height:100%;
  display:flex;align-items:center;justify-content:center;overflow:hidden;
  background:#fff;box-shadow:0 0 0 1px var(--line), 0 22px 40px -22px rgba(29,53,87,.55);
  user-select:none;-webkit-user-select:none;
}
.leaf.left{left:0;border-radius:8px 0 0 8px}
.leaf.right{left:50%;border-radius:0 8px 8px 0}
.leaf.blank{background:transparent;box-shadow:none}
.leaf.left::after,.leaf.right::after{content:"";position:absolute;top:0;bottom:0;width:46px;pointer-events:none}
.leaf.left::after{right:0;background:linear-gradient(to left, rgba(29,53,87,.16), rgba(29,53,87,0))}
.leaf.right::after{left:0;background:linear-gradient(to right, rgba(29,53,87,.16), rgba(29,53,87,0))}
.leaf.blank::after{display:none}
.book.single .leaf.left{display:none}
.book.single .leaf.right{left:0;width:100%;border-radius:8px}
.book.single .leaf.right::after{width:16px;background:linear-gradient(to right, rgba(29,53,87,.12), rgba(29,53,87,0))}
.leaf img,.face img{display:block;max-width:100%;max-height:100%;-webkit-user-drag:none;pointer-events:none}
.pg-ph{
  width:100%;height:100%;display:grid;place-items:center;text-align:center;padding:20px;
  background:repeating-linear-gradient(-45deg,#fff 0 14px,var(--paper) 14px 28px);
  font:700 clamp(22px,3vw,44px)/1.2 var(--font-en);color:var(--ink-2);
}
.pg-no{position:absolute;bottom:6px;font:600 12px/1 var(--font-en);color:#b3a689;z-index:1}
.pg-no.l{left:12px}
.pg-no.r{right:12px}

/* 翻動中的那一頁 */
.flipper{position:absolute;top:0;height:100%;width:50%;transform-style:preserve-3d;z-index:5;pointer-events:none}
.flipper.right{left:50%;transform-origin:left center}
.flipper.left{left:0;transform-origin:right center}
.flipper.single{left:0;width:100%;transform-origin:left center}
.face{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;overflow:hidden;
  background:#fff;backface-visibility:hidden;-webkit-backface-visibility:hidden;
  box-shadow:0 0 0 1px var(--line);
}
.face.back{transform:rotateY(180deg)}
.face.paper{background:linear-gradient(90deg,#efe7d6,#fbf8f1 30%,#fff)}
.flipper.right .face.front,.flipper.single .face.front{border-radius:0 8px 8px 0}
.flipper.right .face.back,.flipper.single .face.back{border-radius:8px 0 0 8px}
.flipper.left .face.front{border-radius:8px 0 0 8px}
.flipper.left .face.back{border-radius:0 8px 8px 0}
.flipper.single .face.front{border-radius:8px}
.face .shade{position:absolute;inset:0;opacity:0;pointer-events:none;z-index:2}
.flipper.right .front .shade,.flipper.single .front .shade{background:linear-gradient(to right, rgba(0,0,0,.05), rgba(0,0,0,.28))}
.flipper.right .back .shade,.flipper.single .back .shade{background:linear-gradient(to left, rgba(0,0,0,.05), rgba(0,0,0,.28))}
.flipper.left .front .shade{background:linear-gradient(to left, rgba(0,0,0,.05), rgba(0,0,0,.28))}
.flipper.left .back .shade{background:linear-gradient(to right, rgba(0,0,0,.05), rgba(0,0,0,.28))}
.flipper.turning .shade{animation:pageShade var(--dur,700ms) ease-in-out both}
@keyframes pageShade{0%{opacity:0}50%{opacity:1}100%{opacity:0}}

.captions{margin:14px 0 0;font-size:15px;color:var(--ink-2);text-align:center;line-height:1.6;max-width:900px}
.captions:empty{display:none}

.nav-arrow{
  flex-shrink:0;width:58px;height:58px;border-radius:50%;display:grid;place-items:center;
  background:var(--card);color:var(--ink);border:2px solid var(--ink);
  box-shadow:0 4px 0 var(--ink);
  transition:transform .15s, box-shadow .15s, background .15s, opacity .2s;
}
.nav-arrow:hover{background:var(--sun)}
.nav-arrow:active{transform:translateY(3px);box-shadow:0 1px 0 var(--ink)}
.nav-arrow:disabled,.ctl-btn:disabled{opacity:.28;pointer-events:none}
.swipe-hint{display:none}
.swipe-pill{display:none}

/* ---------- Controls ---------- */
.controls{
  margin-top:18px;display:flex;align-items:center;justify-content:center;gap:12px;
}
.ctl-btn{
  width:48px;height:48px;border-radius:14px;display:none;place-items:center;flex-shrink:0;
  background:var(--ink);color:#fff;
}
.ctl-btn.ghost{display:grid;background:var(--card);color:var(--ink);border:1.5px solid var(--line)}
.ctl-btn.ghost:hover{border-color:var(--ink)}

.audio-box{
  display:flex;align-items:center;gap:8px;
  background:var(--card);border:1.5px solid var(--line);border-radius:999px;padding:6px;
  box-shadow:var(--shadow);
}
.audio-box[hidden],.no-audio[hidden]{display:none}
.play-btns{display:flex;gap:8px}
.play-btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:10px 22px 10px 10px;border-radius:999px;
  background:var(--coral);color:#fff;font-weight:700;font-size:16.5px;letter-spacing:.05em;
  box-shadow:0 4px 0 #b84f36;
  transition:transform .12s, box-shadow .12s, background .2s;
}
.play-btn:hover{background:#ef7d60}
.play-btn:active{transform:translateY(3px);box-shadow:0 1px 0 #b84f36}
.play-icon{width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,.22);display:grid;place-items:center}
.play-icon .i-pause{display:none}
.playing .play-icon .i-play{display:none}
.playing .play-icon .i-pause{display:block}
.eq{display:none;align-items:flex-end;gap:2px;height:16px}
.eq i{width:3px;background:#fff;border-radius:2px;animation:eq .8s ease-in-out infinite}
.eq i:nth-child(2){animation-delay:.2s}.eq i:nth-child(3){animation-delay:.4s}.eq i:nth-child(4){animation-delay:.1s}
.playing .eq{display:inline-flex}
@keyframes eq{0%,100%{height:4px}50%{height:16px}}
.audio-progress{width:110px;height:6px;border-radius:6px;background:var(--paper);overflow:hidden}
.audio-progress span{display:block;height:100%;width:0;background:var(--teal);border-radius:6px;transition:width .15s linear}
.speed-btn{
  min-width:42px;height:42px;padding:0 8px;border-radius:999px;display:grid;place-items:center;
  font:600 15px var(--font-en);color:var(--ink);background:var(--paper);
}
.speed-btn:hover{background:#f1e8d6}
.audio-msg{font-size:12.5px;color:#9b2d20;padding:0 8px;max-width:180px;line-height:1.3}
.audio-msg:empty{display:none}
.no-audio{font-size:14px;color:var(--muted);padding:12px 18px;border:1.5px dashed var(--line);border-radius:999px;background:rgba(255,255,255,.6)}

.progress{margin-top:18px;height:6px;border-radius:6px;background:rgba(29,53,87,.08);overflow:hidden}
.progress span{display:block;height:100%;width:0;border-radius:6px;background:linear-gradient(90deg,var(--teal),var(--sky),var(--sun),var(--coral));background-size:600px 100%;transition:width .35s}
.kbd-tip{text-align:center;color:var(--muted);font-size:13px;margin:12px 0 0}

/* ---------- Empty ---------- */
.empty{text-align:center;padding:80px 20px;background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow)}
.empty-art{font:700 64px var(--font-en);letter-spacing:.1em;color:var(--sun)}
.empty h1{margin:.2em 0}
.empty p{color:var(--muted)}

.footer{text-align:center;font-size:13px;color:var(--muted);padding:26px 16px 30px}
.footer a{color:var(--ink-2)}

/* Fullscreen (上課投影) */
.stage-wrap:fullscreen{background:var(--paper);padding:24px 32px;justify-content:center}
.stage-wrap:fullscreen .kbd-tip{display:none}

/* ---------- Tablet ---------- */
@media (max-width: 1080px){
  .layout{grid-template-columns:260px minmax(0,1fr);gap:20px;padding:24px 18px 10px}
  .nav-arrow{width:48px;height:48px}
}

/* ---------- Mobile ---------- */
@media (max-width: 820px){
  :root{--topbar:60px}
  .topbar{padding:0 12px;gap:10px}
  .menu-toggle{display:grid}
  .brand-badge{display:none}
  .brand-text strong{font-size:17px}
  .brand-text small{font-size:11.5px}
  .home-btn{padding:8px 12px;font-size:13.5px}
  .layout{display:block;padding:20px 12px 0}

  .sidebar{
    position:fixed;top:0;left:0;bottom:0;z-index:60;width:min(86vw,340px);max-height:none;height:100%;align-self:stretch;
    border-radius:0 22px 22px 0;transform:translateX(-105%);transition:transform .3s cubic-bezier(.2,.8,.2,1);
  }
  .sidebar.open{transform:none}
  .sidebar-head{padding-top:max(16px, env(safe-area-inset-top))}
  .sidebar-close{display:grid;background:var(--paper)}
  .scrim{display:block;position:fixed;inset:0;z-index:55;background:rgba(29,53,87,.45);opacity:0;pointer-events:none;transition:opacity .3s}
  .scrim.show{opacity:1;pointer-events:auto}

  .stage-head{margin-bottom:10px;gap:8px}
  .page-title{font-size:21px;flex-basis:100%;order:3}
  .stage{display:block}
  .zoom-tools{display:none}
  .head-right{gap:0}
  .nav-arrow{display:none}
  .slide-viewport{overflow:hidden;margin:0 -12px;padding:6px 12px 4px}
  .captions{font-size:14px;margin-top:10px}
  .swipe-hint{
    display:block;position:absolute;left:50%;bottom:14px;transform:translateX(-50%);
    background:rgba(29,53,87,.85);color:#fff;font-size:13px;padding:6px 14px;border-radius:999px;
    pointer-events:none;animation:hint 3.2s ease forwards;white-space:nowrap;
  }
  .swipe-hint.gone{display:none}
  .swipe-pill{
    display:block;position:absolute;top:50%;z-index:5;opacity:0;pointer-events:none;
    padding:9px 14px;border-radius:999px;font-weight:700;font-size:14px;white-space:nowrap;
    background:var(--ink);color:#fff;box-shadow:0 8px 20px -6px rgba(29,53,87,.5);
    transform:translateY(-50%) scale(.85);transition:opacity .12s, background .15s;
  }
  .swipe-pill.prev{left:8px}
  .swipe-pill.next{right:8px}
  .swipe-pill.ready{background:var(--coral)}
  .swipe-pill.edge{background:#8a96a8}
  .stage-wrap,.slide-viewport{touch-action:pan-y pinch-zoom}
  @keyframes hint{0%,70%{opacity:1}100%{opacity:0}}

  .controls{
    position:sticky;bottom:0;z-index:30;margin:12px -12px 0;
    padding:10px 12px calc(10px + env(safe-area-inset-bottom));
    background:rgba(251,246,236,.94);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
    border-top:1px solid var(--line);gap:8px;
  }
  .ctl-btn{display:grid}
  .ctl-btn.ghost{display:none}
  .audio-box{flex:1;min-width:0;justify-content:space-between;box-shadow:none}
  .play-btn{padding:8px 16px 8px 8px;font-size:15px;flex-shrink:0}
  .play-btns.two .play-btn{padding-right:12px;font-size:14px}
  .play-icon{width:32px;height:32px}
  .audio-progress{flex:1;min-width:20px;width:auto}
  #replayBtn{display:none}
  .no-audio{flex:1;text-align:center;padding:12px 8px}
  .progress{margin:0 -12px;border-radius:0;height:4px}
  .kbd-tip{display:none}
  .footer{padding-bottom:24px}
}
@media (max-width: 380px){
  .home-btn span{display:none}
  .play-label{display:none}
  .play-btn{padding:8px}
}
@media (prefers-reduced-motion: reduce){
  .sidebar,.progress span{transition:none}
}

/* ---------- 燈箱 Lightbox ---------- */
.lb{
  position:fixed;inset:0;z-index:100;display:flex;flex-direction:column;
  background:rgba(13,24,42,.97);color:#fff;opacity:0;transition:opacity .18s;
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
}
.lb[hidden]{display:none}
.lb.show{opacity:1}
.lb-bar{display:flex;align-items:center;gap:12px;padding:12px 16px;padding-top:max(12px, env(safe-area-inset-top));position:relative;z-index:2}
.lb-title{font:600 19px var(--font-en);min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lb-count{font:500 14px var(--font-en);opacity:.65;white-space:nowrap}
.lb-tools{margin-left:auto;display:flex;align-items:center;gap:2px;background:rgba(255,255,255,.1);border-radius:999px;padding:3px}
.lb-btn{width:40px;height:40px;border-radius:999px;display:grid;place-items:center;color:#fff;transition:background .15s}
.lb-btn:hover{background:rgba(255,255,255,.15)}
.lb-btn:disabled{opacity:.3;pointer-events:none}
.lb-level{min-width:60px;height:40px;border-radius:999px;color:#fff;font:600 14.5px var(--font-en)}
.lb-level:hover{background:rgba(255,255,255,.15)}
.lb-close{background:var(--coral);flex-shrink:0}
.lb-close:hover{background:#ef7d60}
.lb-stage{flex:1;position:relative;overflow:hidden;touch-action:none;cursor:zoom-in;user-select:none;-webkit-user-select:none}
.lb-stage.zoomed{cursor:grab}
.lb-stage.grabbing{cursor:grabbing}
.lb-stage img{
  position:absolute;left:0;top:0;transform-origin:0 0;max-width:none;
  background:#fff;border-radius:6px;box-shadow:0 20px 60px -10px rgba(0,0,0,.6);
  transition:opacity .2s;-webkit-user-drag:none;pointer-events:auto;
}
.lb-nav{
  position:absolute;top:50%;z-index:2;width:54px;height:54px;margin-top:-6px;border-radius:50%;display:grid;place-items:center;
  background:rgba(255,255,255,.12);color:#fff;transition:background .15s;backdrop-filter:blur(4px);
}
.lb-nav:hover{background:var(--sun);color:var(--ink)}
.lb-nav:disabled{opacity:0;pointer-events:none}
.lb-nav.prev{left:18px}
.lb-nav.next{right:18px}
.lb-tip{text-align:center;font-size:13px;opacity:.6;padding:10px 16px calc(12px + env(safe-area-inset-bottom))}
.lb-tip .tip-touch{display:none}
@media (hover: none){
  .lb-tip .tip-desk{display:none}
  .lb-tip .tip-touch{display:inline}
}
@media (max-width: 820px){
  .lb-bar{padding-left:12px;padding-right:12px;gap:8px}
  .lb-title{font-size:16px}
  .lb-tools{display:none}
  .lb-close{margin-left:auto}
  .lb-nav{width:42px;height:42px;top:auto;bottom:calc(46px + env(safe-area-inset-bottom));margin:0}
  .lb-nav.prev{left:12px}.lb-nav.next{right:12px}
}