/* ============================================================
   绵阳农业商城 · 电子手册（屏幕翻页阅读版）
   与打印稿同源内容，改为 16:9 / 适配屏幕的翻页视图
   ============================================================ */

:root{
  --teal:#006361;
  --teal-deep:#004A49;
  --teal-mid:#0A8180;
  --teal-soft:#E2F1F1;
  --green:#96DC00;
  --green-soft:#EAF7D2;
  --gold:#FFCD00;
  --gold-soft:#FFF6D6;
  --orange:#E9760F;
  --orange-soft:#FDEBD8;
  --ink:#26211B;
  --ink2:#5C574F;
  --ink3:#938C82;
  --line:#E5DFD4;
  --cream:#FDFAF4;
  --paper:#F7F5F1;
  --r:14px;
  --shadow:0 4px 24px rgba(0,0,0,.08);
  --shadow-lg:0 18px 60px rgba(0,0,0,.16);
}

*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{height:100%;overflow:hidden}
body{
  font-family:"PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  background:#2A2A28;color:var(--ink);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
button{font-family:inherit;border:none;background:none;cursor:pointer;color:inherit}
img{max-width:100%;height:auto}
p,h1,h2,h3,h4,li,span,div{overflow-wrap:break-word;word-break:normal}

/* ---------- 阅读器外框 ---------- */
.reader{
  height:100%;display:flex;flex-direction:column;
  background:radial-gradient(1200px 700px at 50% 0%,#3A3A37 0%,#232322 70%,#1B1B1A 100%);
}

/* 顶部工具条 */
.bar{
  height:52px;flex:none;display:flex;align-items:center;justify-content:space-between;
  padding:0 18px;color:rgba(255,255,255,.9);position:relative;z-index:40;
}
.bar-l,.bar-r{display:flex;align-items:center;gap:14px}
.bar .title{
  font-size:13px;letter-spacing:.6px;display:flex;align-items:center;gap:9px;
}
.bar .title img{width:22px;height:22px;border-radius:6px;background:#fff;padding:2px}
.bar .title b{font-weight:500}
.bar .title small{color:rgba(255,255,255,.45);font-size:11px;letter-spacing:1px}
.icobtn{
  width:34px;height:34px;border-radius:9px;display:flex;align-items:center;justify-content:center;
  color:rgba(255,255,255,.72);transition:.18s;font-size:15px;
}
.icobtn:hover{background:rgba(255,255,255,.1);color:#fff}
.icobtn.wide{width:auto;padding:0 13px;font-size:12.5px;gap:6px;display:flex}

/* 页码指示 */
.counter{
  font-size:12px;color:rgba(255,255,255,.6);letter-spacing:1px;
  font-variant-numeric:tabular-nums;min-width:56px;text-align:center;
}
.counter b{color:var(--gold);font-weight:500}

/* 进度条 */
.progress{
  height:2px;background:rgba(255,255,255,.1);flex:none;position:relative;z-index:40;
}
.progress i{
  position:absolute;left:0;top:0;bottom:0;background:var(--green);
  transition:width .45s cubic-bezier(.4,0,.2,1);border-radius:0 2px 2px 0;
}

/* ---------- 翻页舞台 ---------- */
.stage{
  flex:1;position:relative;display:flex;align-items:center;justify-content:center;
  padding:14px 16px 10px;min-height:0;min-width:0;overflow:hidden;
}
.deck{
  position:relative;width:100%;height:100%;max-width:1180px;
  perspective:2400px;perspective-origin:50% 50%;min-width:0;
}

/* 竖版：页面按 A4 比例（1:1.414）呈现 */
.sheet{
  position:absolute;top:0;bottom:0;left:50%;width:auto;aspect-ratio:1/1.414;
  max-width:100%;max-height:100%;
  background:#fff;border-radius:var(--r);
  box-shadow:var(--shadow-lg);overflow:hidden;
  opacity:0;pointer-events:none;visibility:hidden;
  transition:transform .58s cubic-bezier(.4,0,.2,1),opacity .38s ease,visibility 0s linear .58s;
  transform-origin:left center;backface-visibility:hidden;
  translate:-50% 0;
}
.sheet.active{
  opacity:1;pointer-events:auto;visibility:visible;
  transform:rotateY(0deg) translateX(0);
  transition:transform .58s cubic-bezier(.4,0,.2,1),opacity .38s ease,visibility 0s;
  z-index:2;
}
.sheet.prev{
  opacity:0;visibility:hidden;
  transform:rotateY(-16deg) translateX(-6%);
  z-index:1;
}
.sheet.next{
  opacity:0;visibility:hidden;
  transform:rotateY(16deg) translateX(6%);
  z-index:1;
}

/* 页面内滚动 */
.sheet > .body{
  position:absolute;inset:0;overflow-y:auto;overflow-x:hidden;
  padding:0;scrollbar-width:thin;scrollbar-color:#D5D0C6 transparent;
  /* 移动端：交给系统惯性滚动，纵向手势归浏览器、横向手势留给 JS 翻页 */
  -webkit-overflow-scrolling:touch;
  overscroll-behavior:contain;
  touch-action:pan-y pinch-zoom;
}
.sheet > .body::-webkit-scrollbar{width:6px}
.sheet > .body::-webkit-scrollbar-thumb{background:#D5D0C6;border-radius:3px}
.sheet > .body::-webkit-scrollbar-track{background:transparent}

/* 内容容器（竖版版心） */
.page{
  min-height:100%;padding:32px 34px 28px;display:flex;flex-direction:column;
  background:#fff;width:100%;max-width:100%;overflow-x:hidden;
}
/* 封面 / 封底：内层 .in 自带内边距并自己承担滚动，外层给确定高度 */
.page.cover,.page.back{padding:0;height:100%}
.cover .in,.back .in{
  overflow-y:auto;overflow-x:hidden;
  -webkit-overflow-scrolling:touch;
  overscroll-behavior:contain;
  touch-action:pan-y pinch-zoom;
  scrollbar-width:thin;
}
.cover .in::-webkit-scrollbar,.back .in::-webkit-scrollbar{width:6px}
.cover .in::-webkit-scrollbar-thumb,.back .in::-webkit-scrollbar-thumb{background:rgba(255,255,255,.35);border-radius:3px}
.cover .in::-webkit-scrollbar-track,.back .in::-webkit-scrollbar-track{background:transparent}

/* ---------- 通用元素 ---------- */
.rh{
  display:flex;align-items:center;justify-content:space-between;
  padding-bottom:12px;margin-bottom:24px;border-bottom:1px solid var(--line);flex:none;
}
.rh .l{display:flex;align-items:center;gap:10px}
.rh .mark{width:24px;height:24px;border-radius:7px;background:var(--teal);position:relative;overflow:hidden;flex:none}
.rh .mark::before{content:"";position:absolute;left:6px;top:6px;width:12px;height:7px;background:var(--green);border-radius:2px}
.rh .mark::after{content:"";position:absolute;left:6px;bottom:6px;width:12px;height:3px;background:rgba(255,255,255,.75);border-radius:2px}
.rh .t{font-size:13px;font-weight:600;letter-spacing:.4px;color:var(--teal)}
.rh .t small{display:block;font-size:9px;font-weight:400;color:var(--ink3);letter-spacing:1.4px;text-transform:uppercase;margin-top:2px}
.rh .r{font-size:11.5px;color:var(--ink3)}

.pg{
  margin-top:auto;padding-top:16px;display:flex;align-items:center;justify-content:space-between;
  font-size:11px;color:var(--ink3);flex:none;
}
.pg .dots{display:flex;gap:5px}
.pg .dots i{width:6px;height:6px;border-radius:50%;background:var(--line);transition:.3s;cursor:pointer}
.pg .dots i.on{background:var(--teal);transform:scale(1.25)}

.sec{margin-bottom:20px}
.sec .no{font-size:10.5px;letter-spacing:3px;color:var(--orange);font-weight:600;display:block;margin-bottom:6px}
.sec h2{font-size:29px;font-weight:700;letter-spacing:.5px;line-height:1.32}
.sec h3{font-size:19px;font-weight:700;letter-spacing:.4px;margin-bottom:10px}
.sec p{font-size:13px;color:var(--ink2);line-height:1.8;margin-top:8px}

.lede{
  background:var(--cream);border-left:4px solid var(--orange);
  border-radius:0 10px 10px 0;padding:14px 20px;margin-bottom:16px;
}
.lede p{font-size:15px;line-height:1.8;color:var(--ink)}
.lede b{color:var(--teal);font-weight:600}

.txt p{font-size:13.5px;line-height:1.85;color:var(--ink2)}
.txt b{color:var(--ink);font-weight:600}
.txt .hl{color:var(--teal);font-weight:600}

.flow{display:flex;align-items:stretch;margin:18px 0}
.flow .s{
  flex:1;background:var(--teal-soft);padding:11px 6px;text-align:center;position:relative;
}
.flow .s:first-child{border-radius:9px 0 0 9px}
.flow .s:last-child{border-radius:0 9px 9px 0}
.flow .s+.s{border-left:2px solid #fff}
.flow .s b{display:block;font-size:13px;color:var(--teal);font-weight:600;white-space:nowrap}
.flow .s i{display:block;font-style:normal;font-size:10.5px;color:var(--ink3);margin-top:4px}

.callout{
  margin-top:22px;background:linear-gradient(135deg,var(--teal),var(--teal-deep));
  border-radius:12px;padding:22px 26px;color:#fff;
}
.callout .lbl{font-size:11px;letter-spacing:2.5px;color:var(--gold);font-weight:600;margin-bottom:8px}
.callout p{font-size:16px;line-height:1.8;font-weight:500}

/* 难题 */
.hard-t{
  font-size:11px;letter-spacing:2.5px;color:var(--orange);font-weight:600;
  margin-bottom:11px;display:flex;align-items:center;gap:10px;
}
.hard-t::after{content:"";flex:1;height:1px;background:var(--orange-soft)}
.hard-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:11px}
.hard{
  border:1px solid var(--line);border-top:3px solid var(--orange);
  border-radius:0 0 9px 9px;padding:12px 13px 14px;background:#fff;
}
.hard .h{margin-bottom:6px}
.hard .h .hi{
  font-size:16px;font-weight:700;color:var(--ink);letter-spacing:.5px;
  display:inline-block;border-bottom:3px solid var(--orange);padding-bottom:2px;
}
.hard p{font-size:12px;line-height:1.7;color:var(--ink3)}

/* 优势卡 */
.adv-list{display:flex;flex-direction:column;gap:14px;flex:1}
.adv{
  border:1px solid var(--line);border-radius:12px;padding:18px 20px;background:#fff;
  position:relative;overflow:hidden;display:flex;flex-direction:column;
}
.adv::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--teal)}
.adv.g::before{background:var(--green)}
.adv.o::before{background:var(--orange)}
.adv.y::before{background:var(--gold)}
.adv h4{
  font-size:18px;font-weight:700;letter-spacing:.3px;display:flex;align-items:center;gap:9px;margin-bottom:12px;
}
.adv h4 .n{font-size:15px;color:var(--teal-soft);font-weight:700;font-family:"Helvetica Neue",Arial,sans-serif;letter-spacing:.5px}
.adv.g h4 .n{color:#8FBF3A}
.adv.o h4 .n{color:#E0913F}
.adv.y h4 .n{color:#C9A227}
.adv h4 .dot{width:8px;height:8px;border-radius:50%;background:var(--teal);flex:none}
.adv.g h4 .dot{background:var(--green)}
.adv.o h4 .dot{background:var(--orange)}
.adv.y h4 .dot{background:var(--gold)}
.adv ul{list-style:none;flex:1}
.adv li{
  font-size:13px;line-height:1.85;color:var(--ink2);padding-left:18px;position:relative;margin-bottom:7px;
}
.adv li::before{
  content:"";position:absolute;left:0;top:8px;width:6px;height:6px;
  background:var(--green);border-radius:1px;transform:rotate(45deg);
}
.adv.g li::before{background:var(--teal)}
.adv.o li::before{background:var(--orange)}
.adv.y li::before{background:var(--gold)}
.adv li b{color:var(--ink);font-weight:600}
.adv .val{
  margin-top:auto;background:var(--green-soft);border-radius:8px;padding:12px 14px;
  font-size:12.5px;color:#3F5C0C;line-height:1.7;display:flex;gap:10px;align-items:flex-start;
}
.adv.g .val{background:var(--teal-soft);color:#044B4A}
.adv.o .val{background:var(--orange-soft);color:#8A3F05}
.adv.y .val{background:var(--gold-soft);color:#7A5603}
.adv .val .t{
  flex:none;font-weight:700;font-size:11px;letter-spacing:.5px;
  background:var(--green);color:#2B3D06;padding:2px 8px;border-radius:5px;margin-top:2px;
}
.adv.g .val .t{background:var(--teal);color:#fff}
.adv.o .val .t{background:var(--orange);color:#fff}
.adv.y .val .t{background:var(--gold);color:var(--teal-deep)}

/* 场景 */
.sc-grid{display:flex;flex-direction:column;gap:11px}
.sc{
  border:1px solid var(--line);border-radius:12px;padding:14px 16px;background:#fff;
  position:relative;overflow:hidden;
}
.sc .tag{
  position:absolute;right:0;top:0;background:var(--orange);color:#fff;
  font-size:10px;font-weight:600;padding:3px 10px;border-radius:0 12px 0 12px;letter-spacing:.5px;
}
.sc h4{font-size:15px;font-weight:700;display:flex;align-items:center;gap:9px;margin-bottom:7px}
.sc h4 .i{
  width:23px;height:23px;border-radius:7px;background:var(--orange-soft);flex:none;
  display:flex;align-items:center;justify-content:center;
}
.sc h4 .i::after{content:"";width:10px;height:10px;border-radius:50%;background:var(--orange)}
.sc p{font-size:12.5px;line-height:1.75;color:var(--ink2)}
.sc.wide{grid-column:span 2}

.sc-cats{margin-top:16px}
.scc-t{font-size:11px;letter-spacing:2.5px;color:var(--orange);font-weight:600;margin-bottom:10px;display:flex;align-items:center;gap:10px}
.scc-t::after{content:"";flex:1;height:1px;background:var(--orange-soft)}
.scc-row{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}
.scc-row span{
  background:var(--orange-soft);border-radius:8px;padding:10px 4px;text-align:center;
  font-size:12.5px;color:#8A3F05;font-weight:600;letter-spacing:.4px;
}
.sc-cats p{font-size:11.5px;color:var(--ink3);margin-top:8px}

.sc-metric{margin-top:16px;display:grid;grid-template-columns:repeat(2,1fr);gap:11px}
.sc-metric .sm{background:var(--teal);border-radius:10px;padding:13px 8px;text-align:center;color:#fff}
.sc-metric .sm:nth-child(2){background:var(--teal-mid)}
.sc-metric .sm:nth-child(3){background:var(--orange)}
.sc-metric .sm:nth-child(4){background:var(--green);color:var(--teal-deep)}
.sc-metric .sm b{display:block;font-size:22px;font-weight:700;letter-spacing:.5px;line-height:1.3}
.sc-metric .sm span{display:block;font-size:11px;opacity:.85;margin-top:4px}

/* 步骤 */
.steps{display:flex;flex-direction:column;gap:14px}
.step{display:flex;gap:16px;align-items:flex-start}
.step .no{
  width:40px;height:40px;border-radius:11px;background:var(--teal);color:#fff;flex:none;
  display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;
  font-family:"Helvetica Neue",Arial,sans-serif;
}
.step:nth-child(2) .no{background:var(--teal-mid)}
.step:nth-child(3) .no{background:var(--orange)}
.step:nth-child(4) .no{background:var(--green);color:var(--teal-deep)}
.step .body{flex:1}
.step h4{font-size:17px;font-weight:700;margin-bottom:5px}
.step p{font-size:13.5px;line-height:1.8;color:var(--ink2)}

.step-flow{display:flex;align-items:center;margin:20px 0}
.step-flow .sf{
  flex:none;width:130px;background:var(--teal-soft);border-radius:9px;padding:12px 8px;text-align:center;
}
.step-flow .sf b{display:block;font-size:16px;font-weight:700;color:var(--teal);letter-spacing:1px}
.step-flow .sf span{display:block;font-size:11px;color:var(--ink3);margin-top:3px}
.step-flow .ar{flex:1;height:2px;background:var(--green);position:relative;min-width:20px}
.step-flow .ar::after{
  content:"";position:absolute;right:0;top:-5px;border-left:10px solid var(--green);
  border-top:6px solid transparent;border-bottom:6px solid transparent;
}

.support{margin-top:20px;display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.support .s{background:var(--cream);border-radius:10px;padding:15px 16px;text-align:center}
.support .s b{display:block;font-size:15px;color:var(--teal);font-weight:700;margin-bottom:5px}
.support .s span{font-size:12px;color:var(--ink3);line-height:1.6}

/* ---------- 封面页 ---------- */
.cover{
  background:linear-gradient(165deg,var(--teal) 0%,var(--teal-mid) 55%,var(--teal-deep) 100%);
  color:#fff;position:relative;overflow:hidden;
}
.cover .bg::before{
  content:"";position:absolute;right:-140px;top:-120px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(150,220,0,.26),transparent 66%);
}
.cover .bg::after{
  content:"";position:absolute;left:-160px;bottom:-140px;width:480px;height:480px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,205,0,.2),transparent 68%);
}
.cover .slice{position:absolute;right:-40px;bottom:-40px;width:340px;height:340px;opacity:.28}
.cover .leaf{position:absolute;right:90px;top:60px;width:150px;height:150px;opacity:.3}
.cover .in{position:relative;z-index:3;padding:52px 62px 44px;display:flex;flex-direction:column;flex:1;min-height:100%}
.cv-top{display:flex;align-items:center;gap:12px}
.cv-logo{width:46px;height:46px;border-radius:13px;background:#fff;padding:5px;flex:none;box-shadow:0 2px 12px rgba(0,0,0,.22)}
.cv-logo img{width:100%;height:100%;object-fit:contain;display:block}
.cv-top .nm{font-size:17px;font-weight:700;letter-spacing:1px}
.cv-top .nm small{display:block;font-size:9px;font-weight:400;letter-spacing:1.8px;color:rgba(255,255,255,.58);text-transform:uppercase;margin-top:2px}

.cv-mid{margin-top:auto;margin-bottom:auto}
.cv-slogan{
  display:inline-flex;align-items:center;gap:9px;margin-bottom:20px;align-self:flex-start;
  font-size:13px;font-weight:600;letter-spacing:3.4px;color:var(--gold);
  border:1px solid rgba(255,205,0,.45);border-radius:20px;padding:6px 18px;background:rgba(255,205,0,.08);
}
.cv-title{font-size:42px;line-height:1.3;font-weight:700;letter-spacing:1.5px}
.cv-title em{font-style:normal;color:var(--green)}
.cv-sub{margin-top:14px;font-size:15px;color:rgba(255,255,255,.92);letter-spacing:.5px;line-height:1.7}
.cv-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.cv-tags span{
  font-size:11.5px;color:#fff;border:1px solid rgba(255,255,255,.32);
  border-radius:18px;padding:4px 13px;letter-spacing:.5px;
}
.cv-tags span.hi{background:var(--gold);color:var(--teal-deep);border-color:var(--gold);font-weight:600}

.cv-points{margin-top:26px;display:grid;grid-template-columns:repeat(2,1fr);gap:11px;max-width:100%}
.cv-points .cp{
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);
  border-radius:10px;padding:13px 10px;text-align:center;
}
.cv-points .cp b{display:block;font-size:14px;font-weight:700;color:var(--gold);letter-spacing:.4px}
.cv-points .cp span{display:block;font-size:10.5px;color:rgba(255,255,255,.66);margin-top:4px;line-height:1.5}

.cv-foot{
  padding-top:20px;border-top:1px solid rgba(255,255,255,.2);
  display:flex;align-items:flex-end;justify-content:space-between;
}
.cv-foot .org{font-size:14px;letter-spacing:.8px}
.cv-foot .org small{display:block;font-size:10.5px;color:rgba(255,255,255,.55);letter-spacing:.4px;margin-top:4px}
.cv-foot .badge{background:var(--gold);color:var(--teal-deep);font-size:12px;font-weight:700;padding:6px 15px;border-radius:7px;letter-spacing:.5px}

/* ---------- 封底页 ---------- */
.back{background:var(--teal-deep);color:#fff;position:relative;overflow:hidden}
.back .glow{
  position:absolute;right:-150px;bottom:-150px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(150,220,0,.2),transparent 66%);
}
.back .in{position:relative;z-index:2;padding:48px 62px 40px;display:flex;flex-direction:column;flex:1;min-height:100%}
.back .bk-slogan{
  display:inline-flex;align-items:center;gap:9px;align-self:flex-start;margin-bottom:18px;
  font-size:12px;font-weight:600;letter-spacing:3.2px;color:var(--gold);
  border:1px solid rgba(255,205,0,.4);border-radius:20px;padding:5px 16px;
}
.back h2{font-size:34px;font-weight:700;letter-spacing:1px;line-height:1.45}
.back .sub{font-size:13px;color:rgba(255,255,255,.72);margin-top:10px;letter-spacing:.4px}
.back .cols{display:flex;flex-direction:column;gap:20px;margin-top:24px;flex:1}
.back .col{flex:1;display:flex;flex-direction:column}
.back .col h5{
  font-size:11.5px;letter-spacing:2.4px;color:var(--gold);font-weight:600;
  padding-bottom:8px;border-bottom:1px solid rgba(255,205,0,.28);margin-bottom:14px;
}
.back .col p{font-size:12.5px;line-height:1.85;color:rgba(255,255,255,.8)}
.back .col p b{color:#fff;font-weight:600}

.bk-url{margin-top:14px;display:flex;flex-direction:column;gap:8px}
.bk-url .u{background:rgba(255,205,0,.1);border:1px solid rgba(255,205,0,.3);border-radius:7px;padding:8px 11px}
.bk-url .u b{display:block;font-size:13px;color:var(--gold);letter-spacing:.3px;font-weight:700}
.bk-url .u span{display:block;font-size:10px;color:rgba(255,255,255,.6);margin-top:2px}

.qr-row{display:flex;gap:12px;margin-top:4px}
.qr-i{flex:1;text-align:center}
.qr-i img{width:100%;aspect-ratio:1;object-fit:contain;display:block;background:#fff;border-radius:8px;padding:6px}
.qr-i p{font-size:10.5px;color:rgba(255,255,255,.78);margin-top:7px;letter-spacing:.4px}
.qr-tip{margin-top:12px;font-size:10.5px;color:rgba(255,255,255,.5);line-height:1.7}

.bk-why{margin-top:22px}
.bw-t{font-size:11px;letter-spacing:2.4px;color:var(--gold);font-weight:600;margin-bottom:12px;display:flex;align-items:center;gap:9px}
.bw-t::after{content:"";flex:1;height:1px;background:rgba(255,205,0,.22)}
.bw-c{display:grid;grid-template-columns:1fr;gap:9px}
.bw{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:9px;padding:11px 13px}
.bw b{display:block;font-size:13.5px;font-weight:700;color:#fff;margin-bottom:4px}
.bw span{font-size:11px;line-height:1.65;color:rgba(255,255,255,.66)}

.back .foot{
  margin-top:auto;padding-top:18px;border-top:1px solid rgba(255,255,255,.18);
  display:flex;align-items:center;justify-content:space-between;
}
.back .foot span{font-size:10.5px;color:rgba(255,255,255,.55);letter-spacing:.4px}
.back .foot .org{font-size:13px;color:#fff;letter-spacing:.8px}

/* ---------- 底部控制条 ---------- */
.ctrl{
  height:62px;flex:none;display:flex;align-items:center;justify-content:center;gap:14px;
  position:relative;z-index:40;
}
.ctrl .nav{
  width:42px;height:42px;border-radius:12px;background:rgba(255,255,255,.1);
  display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.85);
  transition:.18s;font-size:16px;
}
.ctrl .nav:hover:not(:disabled){background:rgba(255,255,255,.2);color:#fff}
.ctrl .nav:disabled{opacity:.25;cursor:not-allowed}
.ctrl .mid{
  display:flex;align-items:center;gap:8px;font-size:12px;color:rgba(255,255,255,.55);
  padding:0 14px;min-width:230px;justify-content:center;
}
.ctrl .mid .track{
  flex:1;height:4px;background:rgba(255,255,255,.12);border-radius:2px;position:relative;cursor:pointer;
}
.ctrl .mid .track i{
  position:absolute;left:0;top:0;bottom:0;background:var(--green);border-radius:2px;
  transition:width .4s;pointer-events:none;
}
.ctrl .mid .track .knob{
  position:absolute;top:50%;width:12px;height:12px;border-radius:50%;background:#fff;
  transform:translate(-50%,-50%);pointer-events:none;box-shadow:0 1px 4px rgba(0,0,0,.3);
  transition:left .4s;
}

/* 目录抽屉 */
.drawer{
  position:fixed;top:0;left:0;bottom:0;width:280px;background:#1F1F1E;z-index:60;
  transform:translateX(-100%);transition:transform .34s cubic-bezier(.4,0,.2,1);
  display:flex;flex-direction:column;box-shadow:6px 0 30px rgba(0,0,0,.4);
}
.drawer.open{transform:none}
.drawer .dh{
  padding:18px 20px;border-bottom:1px solid rgba(255,255,255,.09);
  display:flex;align-items:center;justify-content:space-between;
}
.drawer .dh b{font-size:13px;color:#fff;font-weight:500;letter-spacing:.5px}
.drawer .list{flex:1;overflow-y:auto;padding:10px 0}
.drawer .list::-webkit-scrollbar{width:5px}
.drawer .list::-webkit-scrollbar-thumb{background:rgba(255,255,255,.15);border-radius:3px}
.drawer .it{
  padding:11px 20px;font-size:13px;color:rgba(255,255,255,.65);cursor:pointer;
  display:flex;align-items:center;gap:11px;border-left:3px solid transparent;transition:.16s;
}
.drawer .it:hover{background:rgba(255,255,255,.05);color:#fff}
.drawer .it.on{border-left-color:var(--green);color:var(--green);background:rgba(150,220,0,.07)}
.drawer .it .i{
  width:22px;height:22px;border-radius:6px;background:rgba(255,255,255,.08);
  display:flex;align-items:center;justify-content:center;font-size:10.5px;flex:none;
  font-variant-numeric:tabular-nums;
}
.drawer .it.on .i{background:var(--green);color:#1B1B1A;font-weight:600}
.mask{
  position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:55;opacity:0;pointer-events:none;transition:.3s;
}
.mask.on{opacity:1;pointer-events:auto}

/* 提示 */
.hint{
  position:fixed;left:50%;bottom:80px;transform:translateX(-50%);
  background:rgba(0,0,0,.78);color:#fff;font-size:12.5px;padding:9px 18px;
  border-radius:20px;z-index:70;opacity:0;pointer-events:none;transition:.25s;
}
.hint.on{opacity:1}

/* 移动端 */
@media (max-width:820px){
  /* 关掉 3D 透视：iOS/微信下 perspective+rotateY 会让内部 overflow 滚动失效 */
  .deck{perspective:none}
  .sheet{
    backface-visibility:visible;
    transition:transform .42s ease,opacity .32s ease,visibility 0s linear .42s;
  }
  .sheet.active{
    transform:translateX(0);
    transition:transform .42s ease,opacity .32s ease,visibility 0s;
  }
  .sheet.prev{transform:translateX(-6%)}
  .sheet.next{transform:translateX(6%)}

  .bar{height:48px;padding:0 12px}
  .bar .title small{display:none}
  .stage{padding:10px 8px 4px}
  .page{padding:24px 18px 28px}
  .sec h2{font-size:24px}
  .sec p{font-size:12.5px}
  .lede p{font-size:13.5px}
  .lede{padding:12px 15px;margin-bottom:14px}
  .txt p{font-size:13px}
  .adv h4{font-size:15px}
  .adv li{font-size:12px}
  .adv .val{font-size:11.5px;padding:10px 12px}
  .adv h4 .n{font-size:13px}
  .cv-in{padding:30px 24px 26px}
  .cv-title{font-size:34px}
  .cv-sub{font-size:14px}
  .cv-points{grid-template-columns:repeat(2,1fr);gap:9px;margin-top:20px}
  .cv-points .cp b{font-size:12.5px}
  .cv-points .cp span{font-size:9.5px}
  .cv-slogan{font-size:11px;letter-spacing:2.4px;padding:5px 13px}
  .hard-grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .hard .h .hi{font-size:15px}
  .hard p{font-size:11.5px}
  .adv-list{grid-template-columns:1fr;gap:12px}
  .adv{padding:16px 17px}
  .sc-grid{grid-template-columns:1fr;gap:10px}
  .sc.wide{grid-column:span 1}
  .sc p{font-size:12px}
  .sc h4{font-size:14px}
  .scc-row{grid-template-columns:repeat(3,1fr);gap:8px}
  .scc-row span{font-size:12px;padding:9px 3px}
  .sc-metric{grid-template-columns:repeat(2,1fr);gap:9px}
  .sc-metric .sm b{font-size:18px}
  .step-flow{flex-wrap:wrap;gap:6px}
  .step-flow .sf{width:auto;flex:1;min-width:64px}
  .step-flow .ar{display:none}
  .support{grid-template-columns:1fr;gap:8px}
  .flow{flex-wrap:wrap;gap:5px}
  .flow .s{flex:1;min-width:calc(50% - 3px);border-radius:8px!important}
  .flow .s+.s{border-left:none}
  .callout p{font-size:13.5px}
  /* 底部留白加大：iOS 老版本滚动容器会忽略 padding-bottom */
  .back .in{padding:30px 24px 46px}
  .cover .in{padding:30px 24px 34px}
  .back h2{font-size:25px}
  .back .cols{flex-direction:column;gap:16px}
  .bw-c{grid-template-columns:1fr;gap:8px}
  .bw span{font-size:10.5px}
  .ctrl .mid{min-width:0;flex:1}
  .ctrl{gap:8px;padding:0 12px}
  .drawer{width:250px}
}

/* 打印：借用打印稿 */
@media print{
  @page{size:A4 portrait;margin:0}
  html,body{overflow:visible;height:auto;background:#fff}
  .reader{background:#fff;display:block}
  .bar,.ctrl,.drawer,.mask,.progress,.hint{display:none!important}
  .stage{padding:0;display:block;overflow:visible;height:auto}
  .deck{position:static;height:auto;max-width:none;perspective:none}
  .sheet{
    position:static;opacity:1!important;transform:none!important;pointer-events:auto;
    visibility:visible!important;box-shadow:none;border-radius:0;
    page-break-after:always;break-after:page;height:auto;overflow:hidden;
  }
  .sheet:last-child{page-break-after:auto;break-after:auto}
  .sheet > .body{position:static;overflow:visible}
  .page{min-height:0;height:auto;padding:14mm 13mm;max-width:none}
  .page.cover,.page.back{height:auto;padding:0}
  .cover .in,.back .in{overflow:visible;height:auto}
  .pg{margin-top:12px}
  /* 打印时整体收紧，保证每页单页容纳 */
  .sec h2{font-size:24px}
  .sec p{font-size:11.5px}
  .lede{padding:11px 16px;margin-bottom:12px}
  .lede p{font-size:12.5px}
  .txt p{font-size:12px}
  .flow{margin:14px 0}
  .flow .s{padding:9px 5px}
  .hard-grid{gap:9px}
  .hard{padding:10px 11px 11px}
  .hard p{font-size:11px}
  .callout{margin-top:14px;padding:14px 18px}
  .callout p{font-size:12.5px}
  .adv{padding:14px 16px}
  .adv h4{font-size:15px;margin-bottom:9px}
  .adv li{font-size:11.5px;margin-bottom:5px}
  .adv .val{font-size:11px;padding:9px 11px}
  .sc{padding:12px 14px}
  .sc h4{font-size:13.5px;margin-bottom:6px}
  .sc p{font-size:11.5px}
  .sc-cats{margin-top:12px}
  .sc-metric{margin-top:12px}
  .sc-metric .sm{padding:10px 6px}
  .sc-metric .sm b{font-size:18px}
  .steps{gap:10px}
  .step .no{width:32px;height:32px;font-size:15px}
  .step h4{font-size:14.5px}
  .step p{font-size:11.5px}
  .step-flow{margin:14px 0}
  .support{margin-top:14px}
  .back .in{padding:16mm 13mm 14mm}
  .back h2{font-size:26px}
  .back .cols{margin-top:20px}
  .bk-why{margin-top:16px}
}