/* =====================================================================
   拾光喵 · 拾光册（活动页）
   一页一枚邮票的翻页册。动效只用 transform / opacity；尊重减少动态效果。
   ===================================================================== */

.act-body{overscroll-behavior-x:none}
.act-main{flex:1;display:flex;flex-direction:column}

/* ---------- 舞台：雾霾蓝由浅到深 ---------- */
.act-stage{
  position:relative;min-height:100svh;overflow:clip;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  padding:calc(var(--nav-h) + 22px) 0 22px;background:var(--bg2)
}
.act-haze{position:absolute;inset:0;pointer-events:none}
.act-haze i{position:absolute;display:block}
.act-haze i:nth-child(1){left:-14%;top:4%;width:40%;height:60%;background:var(--d1);border-radius:120px;opacity:.7}
.act-haze i:nth-child(2){right:-12%;bottom:-10%;width:40%;height:52%;background:var(--d1);border-radius:120px;opacity:.7}
.act-haze i:nth-child(3){left:2.5%;bottom:10%;width:16vmin;height:16vmin;background:var(--d2);border-radius:40%;opacity:.6}
.act-haze i:nth-child(4){right:3.5%;top:14%;width:11vmin;height:11vmin;background:var(--d2);border-radius:40%;opacity:.6}
.act-haze i:nth-child(5){right:12%;top:31%;width:1.5vmin;height:1.5vmin;background:var(--warm);border-radius:50%}

/* ---------- 册子 ---------- */
.book-wrap{
  --pw:420px;--ph:580px;
  --ink:#1C1917;--ink2:#57534E;--paper-page:#FCFAF5;--paper-stamp:#F6F2E5;
  --noise: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='.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .42 0 0 0 0 .36 0 0 0 0 .26 .11 0 0 0 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  position:relative;z-index:1;width:100%;display:flex;justify-content:center;
  touch-action:pan-y;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none
}
.book{position:relative;width:calc(var(--pw) * 2);height:var(--ph);outline:none}
.book.single{width:var(--pw)}
.book-shift{position:absolute;top:0;left:var(--pw);width:var(--pw);height:var(--ph);will-change:transform}
.book.single .book-shift{left:0}
.book.is-dragging{cursor:grabbing}

/* 书下的影子与纸边 */
.floor{position:absolute;top:0;height:100%;width:100%;pointer-events:none;
  box-shadow:0 30px 60px -24px rgba(28,25,23,.38),0 10px 22px -12px rgba(28,25,23,.18)}
.floor-r{left:0;border-radius:0 12px 12px 0;
  box-shadow:0 30px 60px -24px rgba(28,25,23,.38),0 10px 22px -12px rgba(28,25,23,.18),
    1px 1px 0 #ECE6D8,2px 2px 0 #FBF9F4,3px 3px 0 #E6DFCF,4px 4px 0 #FAF7F0,5px 5px 0 #E2DBCA}
.floor-l{left:-100%;border-radius:12px 0 0 12px;opacity:0;will-change:opacity;
  box-shadow:0 30px 60px -24px rgba(28,25,23,.38),0 10px 22px -12px rgba(28,25,23,.18),
    -1px 1px 0 #ECE6D8,-2px 2px 0 #FBF9F4,-3px 3px 0 #E6DFCF,-4px 4px 0 #FAF7F0,-5px 5px 0 #E2DBCA}
.book.single .floor-l{display:none}

/* 翻页时投在下一页上的影子 */
.cast{position:absolute;top:0;height:100%;width:100%;overflow:hidden;pointer-events:none;z-index:40}
.cast-r{left:0}
.cast-l{left:-100%}
.book.single .cast-l{display:none}
.cast i{position:absolute;top:0;left:0;height:100%;width:22%;opacity:0;will-change:transform,opacity}
.cast-r i{background:linear-gradient(to right,rgba(23,18,14,.32),rgba(23,18,14,.08) 55%,rgba(23,18,14,0))}
.cast-l i{background:linear-gradient(to left,rgba(23,18,14,.32),rgba(23,18,14,.08) 55%,rgba(23,18,14,0))}

/* 一张书页（正反两面） */
.leaf{position:absolute;inset:0;transform-origin:0 50%;transform-style:preserve-3d;will-change:transform;container-type:inline-size}
.face{
  position:absolute;inset:0;overflow:hidden;
  backface-visibility:hidden;-webkit-backface-visibility:hidden;
  background-color:var(--paper-page);background-image:var(--noise);color:var(--ink2);
  font-size:3.6cqw;line-height:1.7
}
.face.front{border-radius:0 12px 12px 0;
  background-image:linear-gradient(to right,rgba(70,56,30,.13),rgba(70,56,30,.04) 5%,rgba(70,56,30,0) 11%),var(--noise)}
.face.back{transform:rotateY(180deg);border-radius:12px 0 0 12px;
  background-image:linear-gradient(to left,rgba(70,56,30,.13),rgba(70,56,30,.04) 5%,rgba(70,56,30,0) 11%),var(--noise)}
.book.single .face.front{background-image:linear-gradient(to right,rgba(70,56,30,.09),rgba(70,56,30,0) 6%),var(--noise)}
.shade{position:absolute;inset:0;pointer-events:none;opacity:0;z-index:30;will-change:opacity}
.face.front .shade{background:linear-gradient(to right,rgba(23,18,14,.42),rgba(23,18,14,.12) 55%,rgba(255,255,255,.04))}
.face.back .shade{background:linear-gradient(to left,rgba(23,18,14,.42),rgba(23,18,14,.12) 55%,rgba(255,255,255,.04))}

/* 通用书页排版（单位跟着页宽走） */
.face :where(h2,h3){color:var(--ink);letter-spacing:.02em}
.pg-eyebrow{font-size:3.1cqw;letter-spacing:.32em;font-weight:700;color:#E0762B;padding-left:.32em}
.pg-title{font-size:6.6cqw;line-height:1.35;margin-top:2.4cqw;font-weight:700}
.pg-text{font-size:3.7cqw;color:var(--ink2)}
.pg-hint{margin-top:auto;font-size:3.1cqw;letter-spacing:.08em;color:var(--ink2);opacity:.72}

/* ---------- 封面 / 封底（雾霾蓝布面） ---------- */
.pg-cover,.pg-backcover,.pg-cloth{
  background-color:#2A2115;color:#F7F2EA;
  background-image:
    radial-gradient(120% 80% at 28% 16%,rgba(199,168,116,.26),rgba(199,168,116,0) 60%),
    linear-gradient(160deg,#2F2715 0%,#271F14 52%,#1E1711 100%)
}
.pg-cover::after,.pg-backcover::after,.pg-cloth::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='c'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='1.2' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 .09 0 0 0 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23c)'/%3E%3C/svg%3E")
}
.pg-cover{display:flex;flex-direction:column;align-items:center;text-align:center;padding:13cqw 10cqw 9cqw;
  box-shadow:inset 3.2cqw 0 3cqw -2.4cqw rgba(0,0,0,.28)}
.cv-frame{position:absolute;inset:5cqw 5cqw 5cqw 7cqw;border:1px solid rgba(247,242,234,.22);border-radius:2.4cqw;pointer-events:none}
.cv-kicker{font-size:3cqw;letter-spacing:.42em;padding-left:.42em;color:#B3A897}
.cv-seal{margin-top:9cqw;width:34cqw;aspect-ratio:386/479;container-type:inline-size;
  filter:drop-shadow(0 2cqw 3cqw rgba(0,0,0,.25))}
.cv-seal-paper{position:absolute;inset:0;display:grid;place-items:center;background:#F6F2E5;
  -webkit-mask:var(--perf);mask:var(--perf)}
.cv-seal-paper img{width:64%;height:auto;border-radius:22%}
.cv-title{margin-top:9cqw;font-size:12.5cqw;line-height:1.1;letter-spacing:.26em;padding-left:.26em;color:#F7F2EA;font-weight:700}
.cv-sub{margin-top:5cqw;font-size:4cqw;color:#F7F2EA;letter-spacing:.06em}
.cv-sub2{margin-top:1.4cqw;font-size:3.4cqw;color:#B3A897;letter-spacing:.04em}
.cv-open{position:absolute;right:9cqw;bottom:8.5cqw;display:flex;align-items:center;gap:1.4cqw;
  flex-direction:row-reverse;font-size:3.1cqw;letter-spacing:.2em;color:#F7F2EA;opacity:.85}
.cv-open svg{width:4.4cqw;height:4.4cqw}
.cv-corner{position:absolute;right:0;bottom:0;width:14cqw;height:14cqw;pointer-events:none;
  background:linear-gradient(135deg,rgba(255,255,255,0) 50%,rgba(255,255,255,.16) 50%,rgba(255,255,255,.04) 70%,rgba(0,0,0,.08));
  border-top-left-radius:2cqw;animation:cvCorner 3.2s ease-in-out 1.6s infinite}
@keyframes cvCorner{0%,100%{opacity:.35}50%{opacity:1}}

.pg-backcover{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:10cqw}
.bc-logo{width:24cqw;height:auto;border-radius:22.5%;box-shadow:0 3cqw 6cqw rgba(0,0,0,.28)}
.bc-name{margin-top:5cqw;font-size:5.4cqw;letter-spacing:.3em;padding-left:.3em;font-weight:700;color:#F5F0E8}
.bc-slogan{margin-top:9cqw;font-size:5cqw;line-height:1.75;color:#F7F2EA;font-weight:600;display:flex;flex-direction:column}
.bc-mail{margin-top:8cqw;font-size:3.5cqw}
.bc-mail a{color:#B3A897;text-decoration:none;border-bottom:1px solid rgba(179,168,151,.35)}
.bc-mail a:hover{color:#F7F2EA}
.bc-again{margin-top:6cqw;font:inherit;font-size:3.3cqw;letter-spacing:.14em;color:#F7F2EA;background:rgba(255,255,255,.1);
  border:1px solid rgba(247,242,234,.28);border-radius:999px;padding:1.6cqw 5cqw;cursor:pointer;transition:background-color .2s}
.bc-again:hover{background:rgba(255,255,255,.18)}

/* ---------- 衬页 / 对页 ---------- */
.pg-endpaper{display:flex;align-items:center;justify-content:center;text-align:center;
  background-image:
    linear-gradient(to left,rgba(70,56,30,.13),rgba(70,56,30,.04) 5%,rgba(70,56,30,0) 11%),
    radial-gradient(circle at 1px 1px,rgba(180,83,9,.16) 1px,transparent 1.4px),var(--noise);
  background-size:auto,6cqw 6cqw,auto}
.ep-line{font-size:5.2cqw;line-height:1.75;color:var(--ink);font-weight:600}
.ep-small{margin-top:5cqw;font-size:3.4cqw;line-height:1.85;color:var(--ink2)}
.ep-dot{display:block;width:2.2cqw;height:2.2cqw;border-radius:50%;background:#E0762B;margin:7cqw auto 0}

.pg-comp{display:flex;align-items:center;justify-content:center;text-align:center}
.comp-inner{display:flex;flex-direction:column;align-items:center}
.comp-no{font-size:22cqw;line-height:1;font-weight:700;letter-spacing:.04em;color:transparent;
  -webkit-text-stroke:1px rgba(180,83,9,.42)}
.comp-art{margin-top:6cqw;width:30cqw;height:30cqw;color:#B45309;opacity:.9}
.comp-art svg{width:100%;height:100%;overflow:visible}
.comp-theme{margin-top:6cqw;font-size:5.4cqw;color:var(--ink);font-weight:700;letter-spacing:.2em;padding-left:.2em;
  display:flex;flex-direction:column;align-items:center}
.comp-theme em{font-style:normal;font-weight:500;font-size:3.2cqw;letter-spacing:.14em;color:var(--ink2);margin-top:1.4cqw}

.pg-themes{display:flex;flex-direction:column;align-items:center;padding:12cqw 9cqw 9cqw;text-align:center}
.tm-list{list-style:none;margin-top:7cqw;display:grid;grid-template-columns:repeat(3,1fr);gap:5cqw 4cqw;width:100%}
.tm-list li{display:flex;flex-direction:column;align-items:center;gap:1.6cqw}
.tm-art{width:13cqw;height:13cqw;color:#B45309;padding:2.4cqw;border-radius:3.4cqw;background:rgba(180,83,9,.08)}
.tm-art svg{width:100%;height:100%;overflow:visible}
.tm-cn{font-size:3.4cqw;color:var(--ink);letter-spacing:.12em;padding-left:.12em}
.tm-note{margin-top:auto;font-size:3.4cqw;color:var(--ink2)}

.pg-demo{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:10cqw 8cqw;text-align:center}
.demo{margin-top:8cqw;display:flex;align-items:center;gap:4cqw}
.demo-a{width:30cqw;height:auto;border-radius:1.6cqw;box-shadow:0 1.6cqw 4cqw rgba(28,25,23,.18)}
.demo-arrow{width:8cqw;color:#E0762B;flex:none}
.demo-b{width:34cqw;aspect-ratio:386/479;position:relative;container-type:inline-size;filter:drop-shadow(0 1.6cqw 2.6cqw rgba(28,25,23,.2))}
.demo-paper{position:absolute;inset:0;background:var(--paper-stamp);-webkit-mask:var(--perf);mask:var(--perf)}
.demo-paper img{position:absolute;left:9.5%;top:13.5%;width:76%;height:65%;object-fit:cover}
.demo-note{margin-top:8cqw;font-size:3.7cqw;line-height:1.85;color:var(--ink)}
.demo-src{margin-top:3cqw;font-size:2.8cqw;color:var(--ink2);opacity:.7}

/* ---------- 邮票页 ---------- */
.pg-stamp{display:flex;flex-direction:column;align-items:center;padding:9cqw 8cqw 7cqw;text-align:center}
.pg-head{display:flex;flex-direction:column;align-items:center;gap:1.4cqw}
.pg-no{font-size:3.1cqw;letter-spacing:.3em;padding-left:.3em;font-weight:700;color:#E0762B}
.pg-theme{font-size:6.4cqw;line-height:1.2;font-weight:700;color:var(--ink);letter-spacing:.18em;padding-left:.18em}
.pg-theme em{font-style:normal;font-size:3.2cqw;font-weight:500;letter-spacing:.12em;color:var(--ink2);margin-left:.9em}

/* ---------- 邮票（按模板比例 386×479 重建） ---------- */
.stamp{
  position:relative;width:66cqw;aspect-ratio:386/479;margin:6.5cqw auto 0;container-type:inline-size
}
.stamp,.cv-seal,.demo-b{
  /* 齿孔：内框 + 四边一串圆，合起来就是模板上的波浪齿边 */
  --r:3.4cqw;--d:2.1cqw;--s:7cqw;
  --perf:
    linear-gradient(#000 0 0) center/calc(100% - 2*var(--d)) calc(100% - 2*var(--d)) no-repeat,
    radial-gradient(circle var(--r) at 50% var(--r),#000 96%,#0000 100%) top/var(--s) calc(2*var(--r)) round no-repeat,
    radial-gradient(circle var(--r) at 50% calc(100% - var(--r)),#000 96%,#0000 100%) bottom/var(--s) calc(2*var(--r)) round no-repeat,
    radial-gradient(circle var(--r) at var(--r) 50%,#000 96%,#0000 100%) left/calc(2*var(--r)) var(--s) no-repeat round,
    radial-gradient(circle var(--r) at calc(100% - var(--r)) 50%,#000 96%,#0000 100%) right/calc(2*var(--r)) var(--s) no-repeat round
}
.stamp-shadow{position:absolute;left:7%;right:7%;top:7%;bottom:-1%;border-radius:6%;background:rgba(44,37,29,.34);
  filter:blur(4cqw);opacity:.55;transform:translate3d(0,2.4cqw,0);will-change:transform,opacity}
.stamp-tilt{position:absolute;inset:0;display:block;will-change:transform}
.stamp-card{
  all:unset;box-sizing:border-box;position:absolute;inset:0;display:block;cursor:pointer;
  transform-style:preserve-3d;transform:perspective(1600px) rotateY(0deg);
  transition:transform .85s cubic-bezier(.2,.78,.18,1)
}
.stamp-card.is-flipped{transform:perspective(1600px) rotateY(180deg)}
.stamp-card:focus-visible{outline:3px solid #8DB6E0;outline-offset:4px;border-radius:3%}
.sf{position:absolute;inset:0;display:block;backface-visibility:hidden;-webkit-backface-visibility:hidden}
.sf-back{transform:rotateY(180deg)}
.paper{
  position:absolute;inset:0;display:block;overflow:hidden;
  background-color:var(--paper-stamp);background-image:var(--noise);color:#1E1E1E;
  -webkit-mask:var(--perf);mask:var(--perf)
}
.st-title{position:absolute;left:50%;top:6%;width:21.5%;height:4.8%;transform:translateX(-50%);
  display:grid;place-items:center;border:max(1px,.36cqw) solid #222;
  font-size:3.6cqw;line-height:1;letter-spacing:.24em;padding-left:.24em;font-weight:600;color:#1A1A1A}
.st-photo{position:absolute;left:9.5%;top:13.5%;width:76%;height:65%;overflow:hidden;background:#E6E0D0;
  box-shadow:inset 0 0 0 1px rgba(0,0,0,.05)}
.st-photo img{width:100%;height:100%;object-fit:cover;display:block;pointer-events:none}
.st-date{position:absolute;left:9.5%;bottom:5.2%;font-size:3.7cqw;line-height:1;color:#1A1A1A;letter-spacing:.04em;font-variant-numeric:tabular-nums}
.st-date i{font-style:normal;margin-right:.8em}
.st-year{position:absolute;right:6%;bottom:5.2%;width:4.6cqw;display:flex;flex-direction:column;align-items:center;
  font-size:4.6cqw;line-height:1.62;color:#1A1A1A;font-variant-numeric:tabular-nums}
.st-year b{font-weight:400;display:block;line-height:1.62}
.glare{position:absolute;left:-40%;top:-40%;width:180%;height:180%;pointer-events:none;opacity:0;will-change:transform,opacity;
  background:radial-gradient(closest-side,rgba(255,255,255,.5),rgba(255,255,255,0) 70%)}

/* 邮票背面 */
.paper-back{display:flex;flex-direction:column;align-items:center;text-align:center;padding:24% 13% 0}
.pm{position:absolute;right:9%;top:7%;width:30%;color:#B45309;opacity:.6;transform:rotate(-14deg);display:block}
.pm svg{display:block;width:100%;height:auto}
.pm .pm-wave{position:absolute;left:-78%;top:28%;width:90%}
.sb-title{font-size:8.4cqw;font-weight:700;color:#1C1917;letter-spacing:.24em;padding-left:.24em;line-height:1.2}
.sb-en{margin-top:1.6cqw;font-size:3.6cqw;letter-spacing:.18em;color:#57534E}
.sb-date{margin-top:6cqw;font-size:3.8cqw;color:#57534E;letter-spacing:.04em}
.sb-line{margin-top:6cqw;font-size:4.6cqw;line-height:1.8;color:#1C1917;text-wrap:balance}
.sb-src{position:absolute;left:0;right:0;bottom:7%;font-size:3.1cqw;color:#57534E;opacity:.7;letter-spacing:.08em}

/* ---------- 怎么参与 ---------- */
.pg-rules{display:flex;flex-direction:column;padding:11cqw 10cqw 9cqw}
.rules{list-style:none;margin-top:7cqw;display:grid;gap:6.4cqw}
.rules li{display:flex;gap:4cqw;align-items:flex-start}
.r-no{flex:none;width:8cqw;height:8cqw;border-radius:50%;display:grid;place-items:center;
  background:#B45309;color:#fff;font-size:3.8cqw;font-weight:700;margin-top:.4cqw}
.rules h3{font-size:4.5cqw;line-height:1.45;font-weight:700}
.rules p{margin-top:1.4cqw;font-size:3.6cqw;line-height:1.8;color:var(--ink2)}
.rules-note{margin-top:auto;padding-top:5cqw;border-top:1px dashed rgba(180,83,9,.3);font-size:3.6cqw;color:var(--ink)}

/* ---------- 做一枚 ---------- */
.pg-make{display:flex;flex-direction:column;align-items:center;text-align:center;padding:10cqw 8cqw 8cqw}
.make-a,.make-b{display:flex;flex-direction:column;align-items:center;width:100%;flex:1}
.make-a[hidden],.make-b[hidden]{display:none}
.make-a .pg-text{margin-top:4cqw}
.tm-chips{margin-top:6cqw;display:grid;grid-template-columns:repeat(4,1fr);gap:2.6cqw;width:100%}
.tm-chip{font:inherit;font-size:3.6cqw;letter-spacing:.14em;padding:2.2cqw 0 2.2cqw .14em;border-radius:999px;cursor:pointer;
  color:var(--ink);background:rgba(180,83,9,.07);border:1px solid rgba(180,83,9,.18);
  transition:background-color .2s,color .2s,border-color .2s}
.tm-chip:hover{border-color:rgba(180,83,9,.45)}
.tm-chip[aria-checked="true"]{background:#1C1917;border-color:#1C1917;color:#fff}
.make-pick{margin-top:8cqw;height:auto;padding:3.4cqw 9cqw;font-size:4cqw;border-radius:999px}
.make-err{min-height:1.6em;margin-top:2.4cqw;font-size:3.2cqw;color:#C26A55}
.make-note{margin-top:auto;font-size:3.1cqw;line-height:1.8;color:var(--ink2);opacity:.85}
.make-slot{width:100%;display:flex;justify-content:center}
.make-slot .stamp{width:54cqw;margin-top:4cqw}
.make-actions{margin-top:5cqw;display:flex;align-items:center;gap:3cqw;font-size:3.5cqw;color:var(--ink2)}
.make-link{font:inherit;background:none;border:0;color:var(--ink);cursor:pointer;padding:1cqw 1.4cqw;border-bottom:1px solid rgba(28,25,23,.25)}
.make-link:hover{border-bottom-color:var(--ink)}

/* 新做好的一枚：落下来，照片从下往上印出来 */
.st-print{position:absolute;inset:0;background:#E6E0D0;transform-origin:50% 0;transform:scaleY(0);pointer-events:none}
.stamp.is-new .stamp-tilt{animation:stampDrop .85s cubic-bezier(.22,1.15,.36,1) both}
.stamp.is-new .stamp-shadow{animation:shadowIn .85s ease-out both}
.stamp.is-new .st-print{animation:photoPrint .75s .45s ease-out both}
.stamp.is-new .st-title,.stamp.is-new .st-date,.stamp.is-new .st-year{animation:inkIn .4s 1.05s ease-out both}
@keyframes stampDrop{0%{opacity:0;transform:translate3d(0,14%,0) rotate(-9deg) scale(.74)}60%{opacity:1;transform:translate3d(0,-2%,0) rotate(2deg) scale(1.03)}100%{opacity:1;transform:none}}
@keyframes shadowIn{from{opacity:0}to{opacity:.55}}
@keyframes photoPrint{from{transform:scaleY(1)}to{transform:scaleY(0)}}
@keyframes inkIn{from{opacity:0}to{opacity:1}}

/* ---------- 翻页控制 ---------- */
.book-ctrl{position:relative;z-index:1;margin-top:clamp(16px,2.8vh,28px);display:flex;align-items:center;gap:18px}
.bc-btn{width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:var(--card);color:var(--title);
  display:grid;place-items:center;cursor:pointer;transition:opacity .2s ease,background-color .2s ease}
.bc-btn svg{width:20px;height:20px}
@media (hover:hover){.bc-btn:hover:not(:disabled){background:var(--d1)}}
.bc-btn:disabled{opacity:.32;cursor:default}
.bc-mid{display:flex;flex-direction:column;align-items:center;gap:9px;min-width:168px}
.bc-label{font-size:14px;color:var(--title);letter-spacing:.06em;display:flex;gap:10px;align-items:baseline}
.bc-count{font-size:12px;color:var(--text);opacity:.8;font-variant-numeric:tabular-nums}
.bc-dots{display:flex;gap:8px}
.bc-dots button{position:relative;width:7px;height:7px;border-radius:50%;border:0;padding:0;cursor:pointer;
  background:var(--d3);transition:background-color .25s ease,transform .25s ease}
.bc-dots button::before{content:"";position:absolute;inset:-8px -4px}
.bc-dots button[aria-current="true"]{background:var(--btn);transform:scale(1.35)}
.book-hint{position:relative;z-index:1;margin-top:12px;font-size:13px;color:var(--text);opacity:.78;transition:opacity .6s ease}
.book-hint.is-gone{opacity:0}

/* ---------- 无脚本：竖排阅读 ---------- */
html:not(.js) .book-wrap{--pw:min(420px,90vw);--ph:calc(var(--pw) * 1.38)}
html:not(.js) .book{width:var(--pw);height:auto}
html:not(.js) .book-shift{position:static;height:auto}
html:not(.js) .leaf{position:relative;height:var(--ph);margin-bottom:24px;transform:none}
html:not(.js) .face.back,html:not(.js) .floor,html:not(.js) .cast,html:not(.js) .book-ctrl,html:not(.js) .book-hint{display:none}

/* ---------- 响应式 ---------- */
@media (max-width:760px){
  .act-stage{padding:calc(var(--nav-h) + 14px) 0 16px}
  .book-ctrl{gap:14px}
  .bc-mid{min-width:150px}
}
@media (max-width:380px){
  .nav-brand span{display:none}
}

@media (prefers-reduced-motion: reduce){
  .leaf,.book-shift,.stamp-tilt,.stamp-shadow,.glare,.cast i,.floor-l,.shade{will-change:auto}
  .stamp-card{transition:none}
  .cv-corner{animation:none;opacity:.6}
}
html:not(.js) .cv-open,html:not(.js) .cv-corner{display:none}