/* =========================================================
   A · 真书 3D — 对开书脊 + 页弧 + 真翻页
   ========================================================= */
#mb-book-reader{
  background:
    radial-gradient(ellipse 80% 60% at 50% 50%,#14110e 0%,#080706 70%);
  overflow:visible;
}
#mb-book-reader.mb-reader{overflow:visible}
.mb-book-simple{
overflow:visible;
  position:absolute;inset:4px 10px 2px;
  perspective:1600px;
  perspective-origin:50% 45%;
  display:flex;align-items:center;justify-content:center;
}
.mb-open-book{
  position:relative;
  width:min(98%,960px);
  height:100%;
  max-height:100%;
  transform-style:preserve-3d;
  overflow:visible;
}
/* 桌面投影 */
.mb-book-shadow{
  position:absolute;left:4%;right:4%;bottom:-10px;height:28px;z-index:0;
  background:radial-gradient(ellipse at center,rgba(0,0,0,.65) 0%,transparent 72%);
  filter:blur(10px);pointer-events:none;
}
.mb-book-hard{
  position:relative;z-index:1;
  width:100%;height:100%;
  display:flex;
  transform-style:preserve-3d;
  overflow:visible;
}
/* ========== 书脊（加厚立体） ========== */
.mb-spine{
  position:absolute;left:50%;top:-2px;bottom:-2px;
  width:42px;margin-left:-21px;z-index:40;
  transform:translateZ(18px);
  background:
    linear-gradient(90deg,
      #0e0a08 0%,
      #2a1c16 8%,
      #1a120e 18%,
      #4a3228 32%,
      #6b4a38 48%,
      #4a3228 58%,
      #1a120e 72%,
      #2a1c16 88%,
      #0e0a08 100%);
  box-shadow:
    0 0 0 1px rgba(0,0,0,.5),
    6px 0 18px rgba(0,0,0,.45),
    -6px 0 18px rgba(0,0,0,.45),
    inset 2px 0 4px rgba(255,255,255,.08),
    inset -2px 0 4px rgba(0,0,0,.5);
  border-radius:3px;
  pointer-events:none;
}
.mb-spine::before{
  content:'';position:absolute;inset:6% 7px;
  background:
    repeating-linear-gradient(180deg,
      transparent 0 7px,
      rgba(201,169,97,.1) 7px 8px),
    linear-gradient(90deg,transparent,rgba(255,255,255,.04),transparent);
  border-radius:1px;
}
.mb-spine::after{
  /* 书脊顶部高光 */
  content:'';position:absolute;left:20%;right:20%;top:0;height:40%;
  background:linear-gradient(180deg,rgba(255,255,255,.12),transparent);
  pointer-events:none;
}

/* ========== 左页：向书脊收、外缘抬起 ========== */
.mb-page-left{
  width:50%;height:100%;
  position:relative;
  z-index:5;
  transform-style:preserve-3d;
  transform-origin:right center;
  transform:rotateY(18deg) translateZ(2px);
  border-radius:10px 2px 2px 10px;
  overflow:hidden;
  background:
    /* 页心弧光 */
    radial-gradient(ellipse 90% 120% at 100% 50%,rgba(255,248,235,.04) 0%,transparent 55%),
    /* 近书脊深阴影 */
    linear-gradient(90deg,transparent 70%,rgba(0,0,0,.45) 100%),
    /* 外缘亮边 */
    linear-gradient(90deg,rgba(255,255,255,.06) 0%,transparent 12%),
    linear-gradient(165deg,#221c18 0%,#171310 50%,#120f0c 100%);
  border:1px solid rgba(201,169,97,.16);
  border-right:none;
  box-shadow:
    -8px 12px 28px rgba(0,0,0,.4),
    inset -16px 0 32px -8px rgba(0,0,0,.55),
    inset 0 0 0 1px rgba(255,255,255,.03);
}
/* 左页纸堆厚度（外缘） */
.mb-page-left::before{
  content:'';position:absolute;left:0;top:3%;bottom:3%;width:10px;z-index:4;pointer-events:none;
  background:
    repeating-linear-gradient(90deg,
      rgba(255,255,255,.04) 0 1px,
      transparent 1px 2px),
    linear-gradient(90deg,rgba(40,32,28,.9),transparent);
  border-radius:4px 0 0 4px;
  box-shadow:inset 2px 0 4px rgba(0,0,0,.3);
}
/* 左页内弧（近书脊） */
.mb-page-left::after{
  content:'';position:absolute;right:0;top:0;bottom:0;width:28%;z-index:3;pointer-events:none;
  background:linear-gradient(90deg,transparent,rgba(0,0,0,.28) 70%,rgba(0,0,0,.5));
}

/* ========== 右页区：对称弧度 ========== */
.mb-page-right-wrap{
  width:50%;height:100%;
  position:relative;
  z-index:15;
  transform-style:preserve-3d;
  transform-origin:left center;
  transform:rotateY(-18deg) translateZ(2px);
  border-radius:2px 10px 10px 2px;
  overflow:visible; /* 翻页必须允许叶片跨到左页区域 */
}
.mb-page-right,
.mb-page-right-under,
.mb-flip-face{
  position:absolute;inset:0;
  border-radius:2px 10px 10px 2px;
  overflow:hidden;
  background:
    radial-gradient(ellipse 90% 120% at 0% 50%,rgba(255,248,235,.04) 0%,transparent 55%),
    linear-gradient(270deg,transparent 70%,rgba(0,0,0,.45) 100%),
    linear-gradient(270deg,rgba(255,255,255,.06) 0%,transparent 12%),
    linear-gradient(195deg,#221c18 0%,#171310 50%,#120f0c 100%);
  border:1px solid rgba(201,169,97,.16);
  border-left:none;
  box-shadow:
    8px 12px 28px rgba(0,0,0,.4),
    inset 16px 0 32px -8px rgba(0,0,0,.55),
    inset 0 0 0 1px rgba(255,255,255,.03);
}
.mb-page-right-under{z-index:1}
.mb-page-right{z-index:2}
/* 右页纸堆 + 内弧 */
.mb-page-right::before,
.mb-page-right-under::before,
.mb-flip-front::before{
  content:'';position:absolute;right:0;top:3%;bottom:3%;width:10px;z-index:4;pointer-events:none;
  background:
    repeating-linear-gradient(270deg,
      rgba(255,255,255,.04) 0 1px,
      transparent 1px 2px),
    linear-gradient(270deg,rgba(40,32,28,.9),transparent);
  border-radius:0 4px 4px 0;
}
.mb-page-right::after,
.mb-page-right-under::after,
.mb-flip-front::after{
  content:'';position:absolute;left:0;top:0;bottom:0;width:28%;z-index:3;pointer-events:none;
  background:linear-gradient(270deg,transparent,rgba(0,0,0,.28) 70%,rgba(0,0,0,.5));
}

/* ========== 翻页叶片（书脊为轴） ========== */
.mb-flipper{
  position:absolute;inset:0;z-index:50;
  transform-style:preserve-3d;
  transform-origin:left center;
  pointer-events:none;
  opacity:0;
  visibility:hidden;
  will-change:transform;
  /* 默认铺满右页；动画时由 JS 写 transform */
  transform:rotateY(0deg);
}
.mb-flipper.is-animating{
  opacity:1;
  visibility:visible;
  z-index:60;
}
.mb-flip-slot{
  position:absolute;inset:0;z-index:2;
  overflow:hidden;
}
/* 翻页动态阴影 */
.mb-flip-shade{
  position:absolute;inset:0;z-index:4;pointer-events:none;
  opacity:0;
  background:linear-gradient(90deg,
    rgba(0,0,0,.55) 0%,
    rgba(0,0,0,.2) 35%,
    transparent 70%);
  transition:opacity .2s;
}
.mb-flipper.is-animating .mb-flip-shade{opacity:1}
.mb-flip-face{
  backface-visibility:hidden;
  -webkit-backface-visibility:hidden;
}
.mb-flip-front{
  transform:rotateY(0deg) translateZ(1px);
  z-index:2;
}
.mb-flip-back{
  transform:rotateY(180deg) translateZ(1px);
  z-index:1;
  /* 翻到左页朝向 */
  border-radius:10px 2px 2px 10px;
  border-left:1px solid rgba(201,169,97,.16);
  border-right:none;
  background:
    radial-gradient(ellipse 90% 120% at 100% 50%,rgba(255,248,235,.04) 0%,transparent 55%),
    linear-gradient(90deg,transparent 70%,rgba(0,0,0,.45) 100%),
    linear-gradient(90deg,rgba(255,255,255,.06) 0%,transparent 12%),
    linear-gradient(165deg,#221c18 0%,#171310 50%,#120f0c 100%);
  box-shadow:
    -8px 12px 28px rgba(0,0,0,.4),
    inset -16px 0 32px -8px rgba(0,0,0,.55);
}
.mb-flip-back::before{
  content:'';position:absolute;left:0;top:3%;bottom:3%;width:10px;z-index:4;pointer-events:none;
  background:
    repeating-linear-gradient(90deg,
      rgba(255,255,255,.04) 0 1px,
      transparent 1px 2px),
    linear-gradient(90deg,rgba(40,32,28,.9),transparent);
}
.mb-flip-back::after{
  content:'';position:absolute;right:0;top:0;bottom:0;width:28%;z-index:3;pointer-events:none;
  background:linear-gradient(90deg,transparent,rgba(0,0,0,.28) 70%,rgba(0,0,0,.5));
}
/* 翻页时书页外缘高光条 */
.mb-flip-curl{
  position:absolute;top:0;bottom:0;width:18px;z-index:6;pointer-events:none;
  opacity:0;
}
.mb-flip-front .mb-flip-curl{
  right:0;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.1) 40%,rgba(0,0,0,.25));
  box-shadow:4px 0 12px rgba(0,0,0,.35);
}
.mb-flipper.is-animating .mb-flip-curl{opacity:1}

/* ========== 半页内容：对齐 Web 端信息密度与层级 ========== */
.bk-leaf{
  height:100%;width:100%;
  padding:14px 16px 12px 18px;
  display:flex;flex-direction:column;
  color:#F7F3EC;overflow:hidden;position:relative;
  box-sizing:border-box;background:transparent!important;z-index:2;
}
.mb-page-left .bk-leaf,.mb-flip-back .bk-leaf{padding:14px 18px 12px 16px}
.bk-leaf.is-enter{animation:bkIn .55s cubic-bezier(.16,1,.3,1) both}
@keyframes bkIn{
  from{opacity:.35;filter:blur(4px);transform:translateY(6px)}
  to{opacity:1;filter:none;transform:none}
}

/* Web 风格 eyebrow */
.bk-eye{
  display:inline-flex;align-items:center;gap:6px;align-self:flex-start;
  padding:4px 10px;border-radius:999px;margin-bottom:8px;flex-shrink:0;
  background:rgba(200,16,46,.12);color:#e8a0a8;
  font-size:9px;font-weight:600;letter-spacing:1.5px;
}
.bk-eye::before{content:'';width:4px;height:4px;border-radius:50%;background:var(--mb-red)}
.bk-eye.gold{background:rgba(201,169,97,.12);color:var(--mb-gold)}
.bk-eye.gold::before{background:var(--mb-gold)}

.bk-leaf .bk-chap{
  display:flex;align-items:center;gap:8px;margin-bottom:6px;flex-shrink:0;
}
.bk-leaf .bk-chap .no{
  font-family:var(--mb-serif);font-size:12px;color:var(--mb-gold);letter-spacing:2px;
  padding-right:8px;border-right:1px solid rgba(201,169,97,.35);
}
.bk-leaf .bk-chap .en{
  font-family:var(--mb-latin);font-style:italic;font-size:11px;color:var(--mb-faint);letter-spacing:.5px;
}
.bk-leaf .bk-title{
  font-family:var(--mb-serif);font-weight:600;color:#F7F3EC;
  font-size:clamp(16px,2.4vw,22px);line-height:1.18;margin-bottom:8px;flex-shrink:0;
  letter-spacing:.3px;
}
.bk-leaf .bk-title em{font-style:normal;color:var(--mb-red)}
.bk-leaf .bk-title .g{color:var(--mb-gold)}
.bk-leaf .bk-body{
  font-size:11.5px;line-height:1.65;color:rgba(247,243,236,.62);flex-shrink:0;
}
.bk-leaf .bk-body strong{color:#F7F3EC;font-weight:600}
.bk-leaf .bk-rule{
  width:32px;height:2px;margin:8px 0 10px;flex-shrink:0;
  background:linear-gradient(90deg,var(--mb-red),var(--mb-gold));
  border-radius:1px;
}
.bk-leaf .bk-rule.center{margin-left:auto;margin-right:auto}
.bk-leaf .fill{flex:1;min-height:0;display:flex;flex-direction:column}
.bk-leaf .fill.center{justify-content:center}
.bk-leaf .fill.end{justify-content:flex-end}

/* —— 封面 —— */
.bk-leaf.cover-l,.bk-leaf.cover-r{
  align-items:center;justify-content:center;text-align:center;padding:16px 14px;
}
.bk-leaf .seal{
  width:56px;height:56px;border-radius:14px;margin-bottom:12px;
  background:linear-gradient(145deg,var(--mb-red),var(--mb-red-deep));
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mb-serif);font-weight:900;font-size:32px;color:#fff;
  box-shadow:0 12px 28px rgba(200,16,46,.4),0 0 0 1px rgba(255,255,255,.12) inset;
  position:relative;
}
.bk-leaf .seal::after{
  content:'';position:absolute;inset:0;border-radius:inherit;
  background:radial-gradient(circle at 30% 25%,rgba(255,255,255,.25),transparent 50%);
  pointer-events:none;
}
.bk-leaf .est{font-size:10px;letter-spacing:2.5px;color:var(--mb-faint);margin-bottom:6px}
.bk-leaf.cover-l .brand{
  font-family:var(--mb-serif);font-size:20px;font-weight:600;letter-spacing:3px;color:#fff;
}
.bk-leaf.cover-l .brand small{
  display:block;font-family:var(--mb-latin);font-style:italic;font-size:12px;
  letter-spacing:2px;color:var(--mb-faint);margin-top:4px;font-weight:400;
}
.bk-leaf.cover-l .bk-partner{
  margin-top:14px;font-size:10px;color:rgba(247,243,236,.45);letter-spacing:1px;line-height:1.5;
  max-width:16ch;
}
/* 防止主站 .partner 等类污染 */
.bk-leaf .bk-partner,
.bk-leaf .brand,
.bk-leaf .matrix,
.bk-leaf .missions,
.bk-leaf .quotes,
.bk-leaf .svc-list{background:transparent!important}
.bk-leaf.cover-r h1{
  font-family:var(--mb-serif);font-size:clamp(22px,3.2vw,30px);font-weight:700;
  line-height:1.15;color:#F7F3EC;letter-spacing:.5px;
}
.bk-leaf.cover-r h1 em{font-style:normal;color:var(--mb-red);position:relative}
.bk-leaf.cover-r .sub{
  margin-top:10px;font-size:12px;color:rgba(247,243,236,.58);line-height:1.65;max-width:30ch;
}
.bk-leaf.cover-r .hint{
  margin-top:14px;font-size:10px;color:var(--mb-faint);letter-spacing:1.5px;
}
.bk-leaf .rule{
  width:40px;height:1px;margin:10px auto;
  background:linear-gradient(90deg,transparent,var(--mb-gold),transparent);
}

/* —— 数据 —— */
.bk-leaf .matrix{
  flex:1;min-height:0;
  display:grid;grid-template-columns:1fr 1fr;grid-template-rows:repeat(3,1fr);
  gap:7px;margin-top:4px;
}
.bk-leaf .matrix .cell{
  border:1px solid rgba(201,169,97,.18);border-radius:10px;
  background:linear-gradient(160deg,rgba(255,255,255,.05),rgba(255,255,255,.015));
  padding:10px 10px;display:flex;flex-direction:column;justify-content:center;
  transition:border-color .3s;
}
.bk-leaf .matrix .cell .n{
  font-family:var(--mb-serif);font-weight:700;font-size:clamp(20px,2.8vw,26px);color:#fff;line-height:1;
}
.bk-leaf .matrix .cell .n i{font-style:normal;color:var(--mb-red);font-size:.48em;margin-left:1px}
.bk-leaf .matrix .cell .n b{font-weight:700;color:var(--mb-gold);font-size:.42em}
.bk-leaf .matrix .cell .l{font-size:10px;color:rgba(247,243,236,.5);margin-top:5px;line-height:1.3}
.bk-leaf .matrix .cell .en{
  font-family:var(--mb-latin);font-style:italic;font-size:9px;color:rgba(247,243,236,.25);margin-top:2px;
}

/* —— 使命 —— */
.bk-leaf .missions{display:flex;flex-direction:column;gap:7px;margin-top:6px;flex:1;min-height:0;justify-content:center}
.bk-leaf .missions .m{
  padding:10px 12px;border-radius:10px;
  background:rgba(200,16,46,.08);border:1px solid rgba(200,16,46,.2);
  display:flex;gap:10px;align-items:flex-start;
}
.bk-leaf .missions .m .ic{
  width:28px;height:28px;border-radius:8px;flex-shrink:0;
  background:rgba(200,16,46,.2);color:#f0a0a8;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mb-serif);font-size:13px;font-weight:600;
}
.bk-leaf .missions .m .t{font-family:var(--mb-serif);font-size:13px;font-weight:600;margin-bottom:2px;color:#fff}
.bk-leaf .missions .m .d{font-size:10.5px;color:rgba(247,243,236,.55);line-height:1.4}

/* —— 视频 —— */
.bk-leaf .player{
  flex:1;min-height:0;margin-top:8px;border-radius:10px;overflow:hidden;
  border:1px solid rgba(201,169,97,.22);background:#000;
  box-shadow:0 8px 24px rgba(0,0,0,.35);
}
.bk-leaf .player video{width:100%;height:100%;object-fit:contain}

/* —— 摘录 —— */
.bk-leaf .quotes{flex:1;min-height:0;display:flex;flex-direction:column;gap:8px;margin-top:4px}
.bk-leaf .quotes .q{
  flex:1;min-height:0;padding:10px 12px;border-radius:10px;
  background:linear-gradient(135deg,rgba(255,255,255,.04),rgba(255,255,255,.015));
  border:1px solid rgba(201,169,97,.12);border-left:3px solid var(--mb-red);
  display:flex;flex-direction:column;gap:4px;
}
.bk-leaf .quotes .flag{font-size:10px;color:var(--mb-gold);font-weight:500}
.bk-leaf .quotes .txt{
  font-size:11.5px;line-height:1.5;color:rgba(247,243,236,.65);flex:1;
  display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden;
  font-family:var(--mb-serif);
}
.bk-leaf .quotes .who{font-size:10px;color:#F7F3EC;margin-top:auto}
.bk-leaf .quotes .who span{color:var(--mb-faint);font-size:9px;margin-left:4px}
.bk-leaf .bk-highlight{color:var(--mb-red);font-weight:700}

/* —— 服务 —— */
.bk-leaf .svc-list{flex:1;min-height:0;display:flex;flex-direction:column;gap:6px;margin-top:4px;justify-content:center}
.bk-leaf .svc-list .sc{
  display:grid;grid-template-columns:auto 1fr auto;gap:8px;align-items:center;
  padding:9px 11px;border-radius:10px;
  border:1px solid rgba(201,169,97,.14);
  background:linear-gradient(135deg,rgba(255,255,255,.04),rgba(255,255,255,.01));
}
.bk-leaf .svc-list .sc .num{
  font-family:var(--mb-latin);font-style:italic;font-size:14px;color:var(--mb-gold);min-width:22px;
}
.bk-leaf .svc-list .sc .t{font-family:var(--mb-serif);font-size:13px;font-weight:600;color:#fff}
.bk-leaf .svc-list .sc .d{font-size:10px;color:rgba(247,243,236,.45);margin-top:1px}
.bk-leaf .svc-list .sc .pr{font-size:12px;color:var(--mb-gold);white-space:nowrap;font-weight:500}
.bk-leaf .svc-list .sc .tag{
  font-size:8px;padding:1px 5px;border-radius:999px;margin-left:4px;vertical-align:middle;
  background:rgba(200,16,46,.2);color:#f0a0ad;
}

/* —— 流程 —— */
.bk-leaf .steps-col{flex:1;min-height:0;display:flex;flex-direction:column;gap:5px;margin-top:2px;justify-content:center}
.bk-leaf .steps-col .st{
  display:grid;grid-template-columns:32px 1fr;gap:10px;align-items:center;
  padding:7px 10px;border-radius:10px;
  background:rgba(255,255,255,.03);border:1px solid rgba(201,169,97,.12);
}
.bk-leaf .steps-col .dot{
  width:32px;height:32px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mb-serif);font-size:12px;color:#fff;font-weight:600;
  background:linear-gradient(145deg,rgba(200,16,46,.35),rgba(200,16,46,.15));
  border:1px solid rgba(201,169,97,.35);
}
.bk-leaf .steps-col .t{font-size:13px;font-weight:600;color:#fff}
.bk-leaf .steps-col .d{font-size:10px;color:rgba(247,243,236,.48);margin-top:1px;line-height:1.35}

/* —— 生态卡 —— */
.bk-leaf .card-stack{flex:1;min-height:0;display:grid;grid-template-columns:1fr;grid-template-rows:repeat(4,1fr);gap:5px;margin-top:2px}
.bk-leaf .card-stack .card{
  padding:7px 10px;border-radius:8px;min-height:0;
  border:1px solid rgba(201,169,97,.14);
  background:linear-gradient(135deg,rgba(255,255,255,.04),rgba(255,255,255,.01));
  display:flex;flex-direction:column;justify-content:center;
}
.bk-leaf .card-stack .tag{font-size:8px;color:var(--mb-gold);letter-spacing:1px;margin-bottom:2px}
.bk-leaf .card-stack .t{font-family:var(--mb-serif);font-size:12.5px;font-weight:600;margin-bottom:2px;color:#fff}
.bk-leaf .card-stack .p{font-size:10px;color:rgba(247,243,236,.5);line-height:1.3;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* —— 小程序 —— */
.bk-leaf .qr-wrap{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;
}
.bk-leaf .qr-wrap .qr{
  width:120px;height:120px;padding:8px;background:#fff;border-radius:12px;
  box-shadow:0 10px 28px rgba(0,0,0,.4),0 0 0 1px rgba(201,169,97,.2);
}
.bk-leaf .qr-wrap .qr img{width:100%;height:100%;object-fit:contain}
.bk-leaf .qr-wrap .tip{font-size:11px;color:rgba(247,243,236,.45);letter-spacing:1px}
.bk-leaf .feats{display:flex;flex-wrap:wrap;gap:5px;margin-top:8px}
.bk-leaf .feats span{
  font-size:10px;padding:4px 9px;border-radius:999px;
  border:1px solid rgba(201,169,97,.22);color:rgba(247,243,236,.55);
  background:rgba(255,255,255,.02);
}

/* —— 星嫂 —— */
.bk-leaf .price-line{
  font-family:var(--mb-serif);font-size:26px;font-weight:700;color:var(--mb-gold);margin:8px 0 6px;line-height:1;
}
.bk-leaf .price-line span{font-size:11px;color:rgba(247,243,236,.45);font-weight:400;margin-left:6px}
.bk-leaf .bens{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin-top:4px;flex:1;align-content:start}
.bk-leaf .bens .ben{
  padding:8px 9px;border-radius:8px;background:rgba(255,255,255,.03);
  border:1px solid rgba(201,169,97,.12);
}
.bk-leaf .bens .ben .t{font-size:11px;font-weight:600;color:#fff}
.bk-leaf .bens .ben .d{font-size:9.5px;color:rgba(247,243,236,.45);margin-top:2px;line-height:1.3}
.bk-leaf .poster-full{
  flex:1;min-height:0;border-radius:10px;overflow:hidden;margin-top:2px;
  border:1px solid rgba(201,169,97,.25);
  box-shadow:0 8px 24px rgba(0,0,0,.35);
}
.bk-leaf .poster-full img{width:100%;height:100%;object-fit:cover;object-position:center top}

/* 2026 真书引擎：封面、页厚、书脊、页弧 */
#mb-book-reader{perspective:1500px;background:radial-gradient(ellipse at 50% 70%,rgba(116,76,42,.34),transparent 54%)}
.mb3d-world{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  perspective:1600px;transform-style:preserve-3d;
  /* 左右不贴边：与舞台边距叠加后，安卓横屏也不会顶满 */
  padding:6px 2.5% 8px;min-height:0;box-sizing:border-box;
}
.mb3d-table-glow{display:none}
.mb3d-book{
  /* 高度相对阅读器容器，不再绑 100dvh（iPhone15 / CSS 强制横屏会裁切） */
  --book-h:min(100%,320px);
  --bk-title-size:clamp(17.5px,2.62vw,24px);
  --bk-body-size:clamp(12px,1.46vw,14px);
  --bk-card-title:clamp(14px,1.72vw,17px);
  --bk-card-body:clamp(12px,1.46vw,14px);
  --bk-card-body-dense:clamp(11px,1.34vw,13px);
  --bk-paper-ink:#2a1b15;
  --bk-paper-body:rgba(42,28,20,.82);
  --bk-paper-muted:rgba(42,28,20,.68);
  position:relative;
  /* 相对阅读区宽度，不贴满整屏（安卓横屏尤其需要） */
  width:min(92%,860px);
  height:var(--book-h);
  max-height:100%;
  max-width:100%;
  transform-style:preserve-3d;
  filter:drop-shadow(0 22px 24px rgba(0,0,0,.62));
}
.mb3d-cover-back{position:absolute;inset:-6px -8px -7px;border-radius:5px 8px 8px 5px;background:linear-gradient(105deg,#23150e,#6e301f 47%,#29140e 52%,#641f1e);box-shadow:inset 0 0 0 1px rgba(201,169,97,.22),0 3px 0 #130b08;transform:translateZ(-8px)}
.mb3d-page-stack-left,.mb3d-page-stack-right{position:absolute;top:1px;bottom:1px;width:calc(50% - 12px);background:repeating-linear-gradient(0deg,#e6dcc8 0,#e6dcc8 1px,#b7a78d 1.7px,#eee4d3 2.3px);z-index:0}
.mb3d-page-stack-left{left:1px;border-radius:5px 0 0 5px;transform:translate(-2px,5px) rotateY(5deg);transform-origin:right center;box-shadow:-5px 5px 0 #a89372,-8px 7px 0 #4a2d1d}
.mb3d-page-stack-right{right:1px;border-radius:0 5px 5px 0;transform:translate(2px,5px) rotateY(-5deg);transform-origin:left center;box-shadow:5px 5px 0 #a89372,8px 7px 0 #4a2d1d}
.mb3d-page{position:absolute;top:0;bottom:0;width:calc(50% - 12px);padding:0!important;overflow:hidden;background:#f2eadb;color:#241b16;backface-visibility:hidden;transform-style:preserve-3d;z-index:3}
.mb3d-page[hidden]{display:none}
.mb3d-page::before{content:'';position:absolute;inset:0;pointer-events:none;z-index:5;opacity:.38;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='p'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.65' numOctaves='3' seed='9'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23p)' opacity='.13'/%3E%3C/svg%3E");mix-blend-mode:multiply}
.mb3d-left-page{left:0;border-radius:6px 1px 2px 6px;transform-origin:right center;transform:rotateY(5.5deg);box-shadow:inset -22px 0 27px rgba(52,34,21,.22),inset 1px 0 rgba(255,255,255,.9)}
.mb3d-right-page{right:0;border-radius:1px 6px 6px 2px;transform-origin:left center;transform:rotateY(-5.5deg);box-shadow:inset 22px 0 27px rgba(52,34,21,.2),inset -1px 0 rgba(255,255,255,.9)}
.mb3d-spine{position:absolute;left:50%;top:-2px;bottom:-4px;width:25px;transform:translateX(-50%) translateZ(7px);z-index:8;border-radius:45%;background:linear-gradient(90deg,rgba(32,17,10,.9),rgba(126,81,45,.48) 28%,rgba(247,225,184,.23) 49%,rgba(91,51,28,.58) 72%,rgba(23,12,8,.92));box-shadow:0 0 14px rgba(28,13,7,.88),inset 0 0 6px rgba(255,231,182,.18)}
.mb3d-turn-sheet{display:none;position:absolute;right:12px;top:0;width:calc(50% - 12px);height:100%;z-index:10;transform-style:preserve-3d;transform-origin:left center;will-change:transform;contain:layout paint;transform:translateZ(0)}
.mb3d-turn-sheet[data-turning="true"]{display:block}
.mb3d-turn-face{position:absolute;inset:0;overflow:hidden;backface-visibility:hidden;background:#f2eadb;border-radius:1px 6px 6px 1px;box-shadow:0 10px 28px rgba(0,0,0,.35)}
.mb3d-turn-back{transform:rotateY(180deg);border-radius:6px 1px 1px 6px}
.mb3d-turn-light{position:absolute;inset:0;z-index:20;pointer-events:none;backface-visibility:hidden;background:linear-gradient(90deg,rgba(35,20,11,.24),transparent 30%,rgba(255,246,214,.38) 64%,rgba(60,34,18,.22));mix-blend-mode:normal}
.mb3d-turn-edge{position:absolute;top:0;bottom:0;right:-2px;width:18%;z-index:22;pointer-events:none;will-change:transform,opacity;background:linear-gradient(90deg,transparent,rgba(255,250,228,.58) 45%,rgba(73,40,20,.34) 82%,rgba(25,14,8,.5))}
.mb3d-turn-arc-shadow{position:absolute;inset:2% -10% 2% auto;width:46%;z-index:19;pointer-events:none;will-change:transform,opacity;background:radial-gradient(ellipse at center,rgba(31,17,9,.46),transparent 68%);filter:blur(5px)}
.bk-turn-placeholder{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;background:linear-gradient(135deg,#efe4cf,#dbc6a6);color:#6f251f;font-family:var(--mb-serif)}
.bk-turn-placeholder span{font-size:12px;letter-spacing:3px}.bk-turn-placeholder strong{font-size:16px;letter-spacing:1px}
.bk-turn-preview{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;padding:18px;text-align:center;font-family:var(--mb-serif);color:#2a1a13;background:linear-gradient(120deg,rgba(255,255,255,.42),rgba(224,207,177,.2))}
.bk-turn-preview span{font-family:var(--mb-sans);font-size:9px;font-weight:600;letter-spacing:1.5px;color:#9c1727}
.bk-turn-preview strong{max-width:18ch;font-size:clamp(17px,2.4vw,22px);line-height:1.25;letter-spacing:.5px}
.bk-turn-preview i{display:block;width:42px;height:1px;background:linear-gradient(90deg,#c8102e,#c9a961)}
.bk-turn-preview small{font-family:var(--mb-latin);font-size:8px;font-style:normal;letter-spacing:1.8px;color:rgba(46,29,20,.5)}
.mb3d-page .bk-leaf,.mb3d-turn-face .bk-leaf{height:100%;background:linear-gradient(120deg,rgba(255,255,255,.5),rgba(235,223,201,.2)),#f2eadb!important;color:#241b16;padding:13px 17px 11px}
.mb3d-page .bk-leaf::before,.mb3d-turn-face .bk-leaf::before{opacity:.18}
.mb3d-page .bk-title,.mb3d-turn-face .bk-title{color:#211713;font-size:var(--bk-title-size)}
.mb3d-page .bk-body,.mb3d-turn-face .bk-body{color:var(--bk-paper-body);font-size:var(--bk-body-size);line-height:1.5}
.mb3d-page .cover-l .brand{font-family:"Songti SC","STSong","Noto Serif SC",serif;font-size:clamp(40px,5.2vw,46px);font-weight:900;letter-spacing:7px;text-indent:7px}
.mb3d-page .cover-l .brand small{font-size:14px;letter-spacing:2.5px;margin-top:7px}
.mb3d-page .cover-l .bk-partner{width:100%;max-width:none;display:flex;flex-direction:column;align-items:center;gap:2px;font-size:9.5px;line-height:1.45;white-space:nowrap}
.mb3d-page .cover-l .bk-partner strong{font-size:10.5px;font-weight:500;letter-spacing:1.5px;color:rgba(46,29,20,.68)}
.mb3d-page :is(.missions .m .t,.quotes .who,.svc-list .sc .t,.steps-col .st .t,.card-stack .card .t,.bens .ben .t){color:var(--bk-paper-ink);font-size:var(--bk-card-title);font-weight:600}
.mb3d-page :is(.missions .m .d,.quotes .txt,.svc-list .sc .d,.steps-col .st .d,.card-stack .card .p,.bens .ben .d){color:var(--bk-paper-body)}
.mb3d-page .bk-body strong,.mb3d-turn-face .bk-body strong{color:#291912}
.mb3d-page .cover-l .brand,.mb3d-turn-face .cover-l .brand,.mb3d-page .cover-r h1,.mb3d-turn-face .cover-r h1{color:#271913}
.mb3d-page .cover-l .brand small,.mb3d-page .cover-l .bk-partner,.mb3d-page .cover-r .sub,.mb3d-page .cover-r .hint,.mb3d-page .est{color:rgba(46,29,20,.58)}
.mb3d-page .bk-eye{color:#a60e24;background:rgba(200,16,46,.09)}
.mb3d-page .bk-eye.gold{color:#8c6b2d;background:rgba(201,169,97,.13)}
.mb3d-page :is(.matrix .cell .l,.matrix .cell .en,.quotes .who span){color:var(--bk-paper-muted)}
.mb3d-page .matrix,.mb3d-page .missions .m,.mb3d-page .quotes .q,.mb3d-page .svc-list .sc,.mb3d-page .card-stack .card{background:rgba(97,65,41,.055);border-color:rgba(70,43,27,.13)}
.mb3d-page .matrix .cell .n{color:#271812}
.mb3d-page .bk-folio{color:rgba(45,28,19,.38)}

/* 矮横屏：吃满阅读高度，宽度仍留边（不 100% 顶满） */
@media (max-height:420px){
  .mb3d-world{padding:2px 1.5% 2px}
  .mb3d-book{--book-h:100%;width:min(96%,880px);max-width:100%}
  /* 左右页缝略收，单页内容区更宽 */
  .mb3d-page,.mb3d-page-stack-left,.mb3d-page-stack-right,.mb3d-turn-sheet{width:calc(50% - 8px)}
  .mb3d-turn-sheet{right:8px}
  .mb3d-page .bk-leaf,.mb3d-turn-face .bk-leaf{padding:6px 14px 5px}
  /* 整开导航收到书内，不再为外侧按钮预留空白 */
  .mb3d-full-nav{width:30px;height:58px}
  .mb3d-full-nav-prev{left:6px}
  .mb3d-full-nav-next{right:6px}
  .bk-full-video{padding:8px 16px 7px}
}
@media (max-height:360px){
  .mb3d-world{padding:1px 4px 1px}
  .mb3d-page .bk-leaf,.mb3d-turn-face .bk-leaf{padding:5px 12px 4px}
}
@media (prefers-reduced-motion:reduce){.mb3d-turn-sheet{transition:opacity .12s!important}}

/* 整开影院：独立舞台，不把半页元素强行拉宽 */
.mb3d-full-spread{position:absolute;inset:0;z-index:9;overflow:hidden;border-radius:6px;background:linear-gradient(135deg,#f4ead8,#e2d0b3);color:#271913;padding:0!important}
.mb3d-full-spread[hidden]{display:none}
.mb3d-full-nav{display:none;position:absolute;top:50%;z-index:24;width:36px;height:72px;padding:0;border:1px solid rgba(201,169,97,.4);border-radius:18px;background:rgba(15,10,7,.84);color:#f1d8a7;align-items:center;justify-content:center;transform:translateY(-50%);box-shadow:0 8px 22px rgba(0,0,0,.4);cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent}
.mb3d-book[data-spread-layout="full-spread"] .mb3d-full-nav{display:flex}
.mb3d-full-nav-prev{left:-43px}.mb3d-full-nav-next{right:-43px}
.mb3d-full-nav svg{display:block;width:18px;height:18px;pointer-events:none}
.mb3d-full-nav:active{transform:translateY(-50%) scale(.94)}
.mb3d-full-nav:focus-visible{outline:2px solid #d5ad63;outline-offset:3px}
.bk-full-video{position:relative;height:100%;display:grid;grid-template-rows:auto minmax(0,1fr) auto;gap:7px;padding:10px 24px 9px;box-sizing:border-box}
.bk-full-video-head,.bk-full-video-foot{display:flex;align-items:center;justify-content:space-between;gap:14px;position:relative;z-index:2;padding:0!important;background:transparent!important}
.bk-full-video-head h2{font-family:var(--mb-serif);font-size:clamp(16px,2.2vw,22px);line-height:1.1;margin-top:2px;color:#251711}
.bk-full-video-head .bk-eye{margin:0;padding:2px 7px;font-size:7.5px;color:#a60e24;background:rgba(200,16,46,.08)}
.bk-full-video-year{font-family:var(--mb-latin);font-size:9px;letter-spacing:1.6px;color:#8c6b2d;white-space:nowrap}
.bk-full-video-frame{min-height:0;background:#070605;border:1px solid rgba(112,72,34,.32);overflow:hidden;box-shadow:0 5px 16px rgba(48,27,15,.22)}
.bk-full-video-frame video{display:block;width:100%;height:100%;object-fit:contain;background:#000}
.bk-full-video-foot{font-size:9px;color:rgba(46,29,20,.66);letter-spacing:.3px}.bk-full-video-foot p{color:rgba(46,29,20,.66)!important}.bk-full-video-foot span{color:#9c1727;white-space:nowrap}
.bk-full-video::after{content:'';position:absolute;left:50%;top:0;bottom:0;width:18px;transform:translateX(-50%);z-index:3;pointer-events:none;background:linear-gradient(90deg,rgba(35,20,11,.14),rgba(255,245,218,.07),rgba(35,20,11,.14))}
@media (max-width:700px){.mb3d-full-nav{width:31px;height:64px}.mb3d-full-nav-prev{left:-35px}.mb3d-full-nav-next{right:-35px}}

/* 公共数字锚点：用真实数据填充页面，不使用空占位 */
.bk-leaf .bk-metrics{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px;margin-top:auto;padding-top:8px;min-height:92px}
.bk-leaf .bk-metric{min-width:0;display:flex;flex-direction:column;justify-content:center;padding:7px 8px;border:1px solid rgba(91,53,30,.14);border-radius:7px;background:rgba(97,65,41,.055)}
.bk-leaf .bk-metric strong{font-family:var(--mb-serif);font-size:clamp(21px,2.8vw,28px);line-height:1;color:#2a1a13}
.bk-leaf .bk-metric.is-primary strong{color:var(--mb-red)}
.bk-leaf .bk-metric strong span{font-size:.45em;color:#9b742e;margin-left:1px}
.bk-leaf .bk-metric small{font-size:10.5px;color:var(--bk-paper-muted);margin-top:3px}
.bk-leaf .bk-metrics-cta{width:100%;min-height:55px;padding-top:3px}
.mb3d-page .feats{flex:1;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-template-rows:repeat(2,minmax(0,1fr));gap:8px;align-content:stretch}
.mb3d-page .feats span{display:flex;align-items:center;justify-content:center;text-align:center}
.mb3d-page .missions .m,.mb3d-page .svc-list .sc,.mb3d-page .steps-col .st{flex:1}
.mb3d-page .card-stack{grid-template-columns:repeat(2,minmax(0,1fr));grid-template-rows:repeat(3,minmax(0,1fr))}
.mb3d-page .card-stack .p{font-size:var(--bk-card-body-dense);line-height:1.3;-webkit-line-clamp:2}
.mb3d-page .qr-wrap{justify-content:flex-end}
.mb3d-page .qr-wrap .qr{width:min(27vw,215px);height:min(27vw,215px)}
.mb3d-page .feats span{color:#7a4f29;background:rgba(201,169,97,.09);border-color:rgba(140,96,45,.22)}
.mb3d-page .feats span:not(.is-community){font-size:12.5px;padding:7px 10px}
.mb3d-page .feats .is-community{position:absolute;top:43px;right:14px;z-index:6;padding:5px 12px;border-radius:999px;background:#c8102e!important;border-color:#c8102e!important;color:#fff!important;font-size:11.5px;font-weight:600;box-shadow:0 5px 14px rgba(200,16,46,.2)}
.mb3d-page .bens{grid-template-rows:repeat(2,minmax(0,1fr));align-content:stretch}
.mb3d-book[data-spread-index="1"] .mb3d-left-page .bk-body+.bk-body,
.mb3d-book[data-spread-index="2"] .mb3d-left-page .bk-body+.bk-body{margin-top:4px!important}
.mb3d-book[data-spread-index="1"] .mb3d-left-page .bk-metrics{min-height:78px;padding-top:4px}
.mb3d-book[data-spread-index="2"] .mb3d-left-page .bk-metrics{min-height:58px;padding-top:2px}
.mb3d-book:is([data-spread-index="1"],[data-spread-index="2"]) .mb3d-left-page .bk-leaf{padding-bottom:17px}
.mb3d-book[data-spread-layout="full-spread"] .mb3d-spine{opacity:0;box-shadow:none}

@media (max-height:420px){
  .bk-leaf .bk-metrics{min-height:62px}
  .bk-leaf .bk-metrics-cta{min-height:44px;padding-top:1px}
  .bk-leaf .bk-metric strong{font-size:clamp(17px,2.3vw,22px)}
  .bk-leaf .bk-metric small{font-size:9.5px}
  .mb3d-page .qr-wrap .qr{width:min(26vw,150px);height:min(26vw,150px)}
  .mb3d-page .bk-timeline-page{--bk-timeline-track-h:168px;--bk-timeline-node-h:90px}
  .mb3d-page .cover-l .brand{font-size:clamp(30px,4.6vw,38px);letter-spacing:4px;text-indent:4px}
  .mb3d-page .cover-l .brand small{font-size:12px}
  .mb3d-page .cover-r h1{font-size:clamp(16px,2.9vw,22px)}
  .mb3d-page .matrix .cell .n{font-size:clamp(15px,2.1vw,19px)}
  .mb3d-page .matrix .cell .l{font-size:10px}
  .mb3d-page .feats span:not(.is-community){font-size:11px;padding:5px 8px}
  .mb3d-page .bk-timeline-node .y{font-size:clamp(12px,1.6vw,14px)}
  .mb3d-page .bk-timeline-node .t{font-size:clamp(12px,1.55vw,14px)}
}

/* 高密度页统一排版约束：由书本容器索引控制，不做单元素偏移补丁 */
.mb3d-page .bk-eye{margin-bottom:4px;padding:3px 8px;font-size:9.5px}
.mb3d-page .bk-chap{margin-bottom:3px}
.mb3d-page .bk-title{margin-bottom:5px;line-height:1.12}
.mb3d-page .bk-rule{margin:5px 0 7px}
.mb3d-page .matrix{gap:4px;margin-top:1px}
.mb3d-page .matrix .cell{min-height:0;padding:5px 8px;border-radius:7px}
.mb3d-page .matrix .cell .n{font-size:clamp(18px,2.35vw,23px)}
.mb3d-page .matrix .cell .l{font-size:11px;margin-top:2px;line-height:1.15}
.mb3d-page .matrix .cell .en{font-size:9.5px;margin-top:1px}
.mb3d-page .missions{justify-content:flex-start;gap:4px;margin-top:2px}
.mb3d-page .missions .m{min-height:0;padding:7px 9px;gap:9px;border-radius:7px;align-items:center}
.mb3d-page .missions .m .ic{width:31px;height:31px;border-radius:7px;font-size:14px;flex:0 0 31px;color:#9c1727}
.mb3d-page .missions .m>div:last-child{display:flex;flex-direction:column;justify-content:center;gap:2px;min-height:100%}
.mb3d-page .missions .m .t{font-size:var(--bk-card-title);margin-bottom:0}
.mb3d-page .missions .m .d{font-size:var(--bk-card-body);line-height:1.35}
.mb3d-page .quotes .q{padding:10px 12px;gap:4px}
.mb3d-page .quotes .flag{font-size:12px}
.mb3d-page .quotes .txt{font-size:clamp(14px,1.82vw,18px);line-height:1.42;flex:none;margin:auto 0}
.mb3d-page .quotes .who{font-size:11px;margin-top:0}
.mb3d-page .quotes .who span{font-size:11px}
.mb3d-page .story-titled{display:grid!important;grid-template-rows:auto auto auto minmax(0,1fr);align-content:stretch}
.mb3d-page .story-titled>.bk-eye{grid-row:1}
.mb3d-page .story-titled>.bk-chap{grid-row:2;min-height:17px}
.mb3d-page .story-titled>.bk-title{grid-row:3;min-height:25px}
.mb3d-page .story-titled>.quotes{grid-row:4;min-height:0;display:grid;grid-template-rows:repeat(2,minmax(0,1fr));gap:7px;margin:0}
.mb3d-page .story-titled .quotes .q{min-height:0;padding:8px 10px;display:grid;grid-template-rows:auto minmax(0,1fr) auto;gap:3px}
.mb3d-page .story-titled .quotes .txt{align-self:center;min-height:1.35em;font-size:clamp(13px,1.66vw,14px);line-height:1.3}
.mb3d-page .story-titled .quotes .who,.mb3d-page .story-titled .quotes .who span{font-size:10.5px}
.mb3d-page .svc-list{justify-content:flex-start;gap:4px;margin-top:1px}
.mb3d-page .svc-list .sc{min-height:0;padding:6px 9px;gap:7px;border-radius:7px}
.mb3d-page .svc-list .sc .num{font-size:12px;min-width:20px}
.mb3d-page .svc-list .sc .t{font-size:var(--bk-card-title)}
.mb3d-page .svc-list .sc .d{font-size:var(--bk-card-body-dense);line-height:1.5}
.mb3d-page .svc-list .sc .pr{font-size:12px}
.mb3d-page .svc-list .sc:first-child .pr,.mb3d-page .price-line{color:var(--mb-red)}
.mb3d-page .steps-col{justify-content:flex-start;gap:3px;margin-top:0}
.mb3d-page .steps-col .st{min-height:0;grid-template-columns:27px 1fr;gap:6px;padding:3px 7px;border-radius:7px}
.mb3d-page .steps-col .dot{width:26px;height:26px;font-size:11.5px;color:#9c1727}
.mb3d-page .steps-col .st .t{font-size:clamp(13px,1.55vw,14.5px);line-height:1.1}
.mb3d-page .steps-col .st .d{font-size:clamp(11px,1.3vw,12px);line-height:1.2}
.mb3d-page .card-stack{gap:3px;margin-top:0}
.mb3d-page .card-stack .card{min-height:0;padding:5px 8px;border-radius:6px}
.mb3d-page .card-stack .tag{font-size:9px;margin-bottom:1px}
.mb3d-page .card-stack .t{font-size:var(--bk-card-title);margin-bottom:1px}
.mb3d-page .card-stack .p{font-size:var(--bk-card-body-dense);line-height:1.25;-webkit-line-clamp:2}
.mb3d-page .bens{min-height:0;gap:4px;margin-top:2px}
.mb3d-page .bens .ben{min-height:0;padding:5px 7px}
.mb3d-page .bens .ben .t{font-size:var(--bk-card-title)}.mb3d-page .bens .ben .d{font-size:var(--bk-card-body-dense);line-height:1.2}
.mb3d-page .poster-full{margin-top:0;background:#f0e4c9}
.mb3d-page .poster-full img{object-fit:contain;object-position:center}
/* 历程页不再夹 CTA，轨道占满下半区 */
.mb3d-page .bk-timeline-page{--bk-timeline-track-h:188px;--bk-timeline-node-h:100px;display:grid!important;grid-template-rows:auto auto auto minmax(0,1fr);align-content:stretch}
.mb3d-page .bk-timeline-track{grid-row:4;position:relative;height:var(--bk-timeline-track-h);align-self:end;display:grid;align-items:stretch;margin-top:auto;margin-bottom:4px}
.mb3d-page .bk-timeline-left .bk-timeline-track{grid-template-columns:repeat(3,minmax(0,1fr))}
.mb3d-page .bk-timeline-right .bk-timeline-track{grid-template-columns:repeat(2,minmax(0,1fr))}
.mb3d-page .bk-timeline-track::before{content:"";position:absolute;left:0;right:0;top:50%;height:3px;transform:translateY(-50%);background:linear-gradient(90deg,#c8102e,#c9a961);box-shadow:-17px 0 #c8102e,17px 0 #c9a961,0 0 10px rgba(200,16,46,.18)}
.mb3d-page .bk-timeline-node{position:relative;min-width:0;min-height:0;height:var(--bk-timeline-node-h);display:block;padding:0 5px;text-align:center}
.mb3d-page .bk-timeline-node.is-top{align-self:start}
.mb3d-page .bk-timeline-node.is-bottom{align-self:end}
.mb3d-page .bk-timeline-node .point{position:absolute;left:50%;width:13px;height:13px;transform:translateX(-50%);border:3px solid #f2eadb;border-radius:50%;background:#c8102e;box-shadow:0 0 0 2px rgba(200,16,46,.28)}
.mb3d-page .bk-timeline-node.is-top .point{bottom:0}
.mb3d-page .bk-timeline-node.is-bottom .point{top:0}
.mb3d-page .bk-timeline-node .copy{position:absolute;left:50%;width:calc(100% - 10px);min-width:0;min-height:58px;max-width:15ch;transform:translateX(-50%);display:flex;flex-direction:column;justify-content:space-between}
.mb3d-page .bk-timeline-left .bk-timeline-node .copy{width:calc(100% - 8px)}
.mb3d-page .bk-timeline-node.is-top .copy{top:0}
.mb3d-page .bk-timeline-node.is-bottom .copy{bottom:1px}
.mb3d-page .bk-timeline-node .y{font-size:clamp(14px,1.9vw,17px);font-weight:800;color:#a60e24}
.mb3d-page .bk-timeline-node .t{font-family:var(--mb-serif);font-size:clamp(14px,1.8vw,16px);font-weight:700;line-height:1.1;color:#261813}
.mb3d-page .bk-timeline-node .d{font-size:11px;line-height:1.2;color:var(--bk-paper-muted);white-space:nowrap}
.mb3d-page .bk-timeline-node.is-future .point{background:#c9a961}
.mb3d-page .bk-timeline-node.is-future .y{color:#8c6b2d}

/* 封底 CTA：左页标题+正文+四数据卡（无 01/02/03） */
.mb3d-page .bk-cta-page{
  display:flex!important;flex-direction:column;height:100%;min-height:0;gap:0;
}
.mb3d-page .bk-cta-page .bk-body{flex:0 0 auto}
.mb3d-page .bk-cta-left .bk-cta-lead{
  margin-top:8px!important;color:var(--bk-paper-ink);font-weight:500;
}
.mb3d-page .bk-cta-metrics{
  display:grid!important;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;
  margin-top:auto;padding-top:10px;min-height:0;flex:0 0 auto;
}
.mb3d-page .bk-cta-metrics .bk-metric{
  min-height:58px;padding:9px 8px;justify-content:center;
}
.mb3d-page .bk-cta-metrics .bk-metric strong{font-size:clamp(18px,2.4vw,22px)}
.mb3d-page .bk-cta-metrics .bk-metric small{font-size:10px;margin-top:3px}

.mb3d-page .bk-cta-steps{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:5px;
  margin-top:6px;flex:1;min-height:0;align-content:center;
}
.mb3d-page .bk-cta-step{
  min-width:0;padding:8px 6px;border-radius:8px;text-align:center;
  background:rgba(97,65,41,.06);border:1px solid rgba(70,43,27,.12);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
}
.mb3d-page .bk-cta-step em{
  font-style:normal;width:20px;height:20px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(200,16,46,.12);color:#a60e24;font-size:11px;font-weight:700;
}
.mb3d-page .bk-cta-step span{font-size:var(--bk-card-title);font-weight:600;color:var(--bk-paper-ink);line-height:1.15}
.mb3d-page .bk-cta-step small{font-size:9.5px;color:var(--bk-paper-muted);line-height:1.2}

.mb3d-page .bk-cta-right .bk-cta-actions{
  display:flex;flex-direction:row;align-items:stretch;gap:8px;margin-top:10px;flex:0 0 auto;
}
.mb3d-page .bk-cta-right .bk-cta-actions .mb-btn{
  flex:1 1 0;min-width:0;justify-content:center;
  padding:12px 10px;font-size:13px;font-weight:600;border-radius:999px;
  box-sizing:border-box;line-height:1.2;
}
/* 书页米黄底：红按钮实底；导航按钮深描边+白底，避免 ghost 浅色看不见 */
.mb3d-page .bk-cta-right .bk-cta-actions .mb-btn-red{
  background:linear-gradient(145deg,#c8102e,#a60e24)!important;
  color:#fff!important;
  border:1px solid #a60e24!important;
  box-shadow:0 8px 16px rgba(200,16,46,.28);
}
.mb3d-page .bk-cta-right .bk-cta-actions .mb-btn-ghost{
  background:#fff!important;
  color:#2a1a13!important;
  border:1.5px solid rgba(70,43,27,.42)!important;
  box-shadow:0 4px 12px rgba(42,26,19,.1);
}
.mb3d-page .bk-cta-foot{
  margin-top:auto;padding-top:8px;text-align:center;
  border-top:1px solid rgba(70,43,27,.1);
}
.mb3d-page .bk-cta-addr{
  margin:0;font-size:11px;color:var(--bk-paper-ink);font-weight:600;line-height:1.3;
}
.mb3d-page .bk-cta-meta{
  margin:3px 0 0;font-size:9px;color:var(--bk-paper-muted);line-height:1.3;
}
@media (max-height:420px){
  .mb3d-page .bk-timeline-page{--bk-timeline-track-h:168px;--bk-timeline-node-h:90px}
  .mb3d-page .bk-cta-left .bk-cta-lead{margin-top:6px!important}
  .mb3d-page .bk-cta-metrics{gap:5px;padding-top:8px}
  .mb3d-page .bk-cta-metrics .bk-metric{min-height:48px;padding:7px 6px}
  .mb3d-page .bk-cta-metrics .bk-metric strong{font-size:clamp(15px,2.1vw,18px)}
  .mb3d-page .bk-cta-metrics .bk-metric small{font-size:9px}
  .mb3d-page .bk-cta-step{padding:6px 4px}
  .mb3d-page .bk-cta-step em{width:18px;height:18px;font-size:10px}
  .mb3d-page .bk-cta-right .bk-cta-actions{gap:6px;margin-top:8px}
  .mb3d-page .bk-cta-right .bk-cta-actions .mb-btn{padding:10px 8px;font-size:12px}
  .mb3d-page .bk-cta-foot{padding-top:6px}
  .mb3d-page .bk-cta-addr{font-size:10px}
  .mb3d-page .bk-cta-meta{font-size:8px}
}
/* 矮横屏：宽布局保留，字号略收小，避免撑出页边 */
@media (max-height:420px){
  .mb3d-book{
    --bk-title-size:clamp(14.5px,2.2vw,18px);
    --bk-body-size:clamp(10.5px,1.35vw,12.5px);
    --bk-card-title:clamp(12.5px,1.7vw,14px);
    --bk-card-body:clamp(10.5px,1.4vw,12px);
    --bk-card-body-dense:clamp(10px,1.3vw,11.5px);
  }
  .mb3d-book:is([data-spread-index="1"],[data-spread-index="2"]) .mb3d-left-page .bk-leaf{padding-bottom:10px}
  .mb3d-page .bk-body{font-size:var(--bk-body-size);line-height:1.35}
  .mb3d-page .bk-body+.bk-body{margin-top:3px!important}
  .mb3d-page .bk-title{font-size:var(--bk-title-size);margin-bottom:3px;line-height:1.1}
  .mb3d-page .bk-eye{margin-bottom:2px;padding:2px 6px;font-size:8.5px}
  .mb3d-page .bk-chap{margin-bottom:2px;font-size:10px}
  .mb3d-page .bk-rule{margin:3px 0 5px}
  .mb3d-page .quotes .flag{font-size:10.5px}
  .mb3d-page .quotes .txt{font-size:clamp(11.5px,1.55vw,13px);line-height:1.32}
  .mb3d-page .quotes .who,.mb3d-page .quotes .who span{font-size:10px}
  .mb3d-page .story-titled .quotes{gap:4px}
  .mb3d-page .story-titled .quotes .q{padding:5px 8px}
  .mb3d-page .story-titled .quotes .txt{font-size:clamp(11.5px,1.5vw,13px)}
  .mb3d-page .svc-list .sc{padding:4px 8px;gap:5px}
  .mb3d-page .svc-list .sc .num{font-size:11px}
  .mb3d-page .svc-list .sc .pr{font-size:11px}
  .mb3d-page .steps-col .st{padding:2px 6px;gap:5px}
  .mb3d-page .steps-col .st .t{font-size:clamp(11.5px,1.4vw,13px)}
  .mb3d-page .steps-col .st .d{font-size:clamp(10px,1.2vw,11px)}
  .mb3d-page .steps-col .dot{width:22px;height:22px;font-size:10px}
  .mb3d-page .card-stack .card{padding:4px 7px}
  .mb3d-page .card-stack .tag{font-size:8px}
  .mb3d-page .bk-timeline-page{--bk-timeline-track-h:160px;--bk-timeline-node-h:86px}
  .mb3d-page .bk-timeline-node .copy{width:calc(100% - 4px);min-height:48px;max-width:15ch}
  .mb3d-page .bk-timeline-node .d{font-size:9.5px;white-space:normal;overflow-wrap:anywhere}
  .mb3d-page .price-line{font-size:17px;margin:2px 0}
  .mb3d-page .matrix .cell{padding:3px 6px}
  .mb3d-page .missions .m{padding:5px 7px;gap:7px}
  .mb3d-page .missions .m .ic{width:26px;height:26px;font-size:12px;flex-basis:26px}
  .mb3d-page .bens .ben{padding:4px 6px}
  .mb3d-page .bk-leaf,.mb3d-turn-face .bk-leaf{padding:5px 12px 4px}
}

/* 极窄横屏（SE 等）：再收一档 */
@media (max-width:700px){
  .mb3d-world{padding:3px 8px 3px}
  .mb3d-book{
    width:100%;
    --bk-title-size:clamp(15px,2.4vw,19px);
    --bk-body-size:clamp(11px,1.45vw,13px);
    --bk-card-title:clamp(13px,1.9vw,14.5px);
    --bk-card-body:clamp(11px,1.7vw,12.5px);
    --bk-card-body-dense:clamp(10.5px,1.55vw,12px);
  }
  .mb3d-page .bk-leaf,.mb3d-turn-face .bk-leaf{padding:6px 11px 5px}
  .mb3d-page .quotes .txt{font-size:clamp(12.5px,2vw,14.5px)}
  .mb3d-page .bk-timeline-node{padding:0 2px}
  .mb3d-page .bk-timeline-node .copy{width:calc(100% - 4px)}
  .mb3d-page .bk-timeline-track::before{box-shadow:-12px 0 #c8102e,12px 0 #c9a961,0 0 10px rgba(200,16,46,.18)}
}