/* ================================================================
 * style.css v8 — turn.js 双页 / 单页 电子画册
 * ================================================================ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --brand:#0a4a8a;
  --brand2:#2e7fd6;
  --ink:#1a2230;
  --muted:#6b7c93;
  --line:rgba(10,74,138,.10);
  --panel:rgba(255,255,255,.88);
  --radius:14px;
}

html,body{height:100%;overflow:hidden}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:linear-gradient(150deg,#e9f0f9 0%,#f7fafe 45%,#e6eefa 100%);
  color:var(--ink);
  -webkit-font-smoothing:antialiased;
  -webkit-tap-highlight-color:transparent;
  user-select:none;
}
button{font-family:inherit}

/* ---------- 顶栏 ---------- */
.topbar{
  position:fixed;inset:0 0 auto 0;height:54px;z-index:400;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 16px;
  background:var(--panel);
  backdrop-filter:blur(16px) saturate(180%);
  -webkit-backdrop-filter:blur(16px) saturate(180%);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:9px;min-width:0}
.logo-dot{
  width:10px;height:10px;border-radius:50%;flex:none;
  background:linear-gradient(135deg,var(--brand),var(--brand2));
  box-shadow:0 0 0 3px rgba(46,127,214,.14);
}
.brand-text{
  font-weight:700;color:var(--brand);font-size:15px;letter-spacing:.4px;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.topbar-right{display:flex;align-items:center;gap:5px}
.chapter-chip{
  font-size:11.5px;color:var(--brand);font-weight:600;
  background:linear-gradient(135deg,rgba(10,74,138,.08),rgba(46,127,214,.10));
  padding:5px 11px;border-radius:999px;white-space:nowrap;
  max-width:160px;overflow:hidden;text-overflow:ellipsis;
  border:1px solid rgba(10,74,138,.08);
}
.indicator{
  font-size:12.5px;color:var(--muted);font-variant-numeric:tabular-nums;
  background:rgba(10,74,138,.05);padding:5px 10px;border-radius:999px;white-space:nowrap;
}
.icon-btn{
  width:34px;height:34px;flex:none;border:none;background:transparent;
  display:flex;align-items:center;justify-content:center;
  border-radius:10px;color:var(--muted);cursor:pointer;
  transition:background .18s,color .18s,transform .18s;
}
.icon-btn:hover{background:rgba(10,74,138,.08);color:var(--brand)}
.icon-btn:active{transform:scale(.94)}
.icon-btn.on{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 3px 10px rgba(10,74,138,.3)}
.icon-btn.off{opacity:.4}

/* ---------- 舞台 ---------- */
.stage{
  position:absolute;top:54px;bottom:78px;left:0;right:0;
  display:flex;align-items:center;justify-content:center;
  padding:22px 20px;
  perspective:2600px;
  perspective-origin:50% 42%;
}
.book-frame{
  position:relative;
  display:flex;align-items:center;justify-content:center;
  width:100%;height:100%;
}

/* turn.js 容器 */
#book{
  position:relative;
  perspective:2600px;
  perspective-origin:50% 42%;
}
#book .turn-page-wrapper{
  box-shadow:0 16px 44px rgba(10,30,60,.22), 0 2px 8px rgba(10,30,60,.10);
}
/* 页面底色 + 书脊 */
#book .page{
  background-color:#fff;
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
#book .shadow{
  background:rgba(10,30,60,.22) !important;
  border-radius:50%;
  height:100% !important;
}
/* 单页模式下隐藏"书脊"阴影 */
#book.single-mode .turn-page-wrapper{box-shadow:0 12px 34px rgba(10,30,60,.20)}
#book.single-mode .turn-page-wrapper.turn-page-wrapper-shadow{
  box-shadow:0 12px 34px rgba(10,30,60,.20) !important;
}
#book.single-mode .fold-corner,
#book.single-mode .fold-back-corner{display:none !important}

/* 拖动提示 */
.corner-hint{
  position:absolute;bottom:14px;left:50%;transform:translateX(-50%);
  font-size:11px;color:#9fb0c4;letter-spacing:.4px;
  pointer-events:none;z-index:300;transition:opacity .5s;
}
.corner-hint.fade{opacity:0}

/* ---------- 底部控制 ---------- */
.controls{
  position:fixed;inset:auto 0 0 0;height:78px;z-index:400;
  display:flex;align-items:center;justify-content:center;gap:9px;padding:0 16px;
  background:var(--panel);
  backdrop-filter:blur(16px) saturate(180%);-webkit-backdrop-filter:blur(16px) saturate(180%);
  border-top:1px solid var(--line);
}
.ctrl-btn{
  width:42px;height:42px;flex:none;border:none;
  background:rgba(10,74,138,.07);color:var(--brand);
  border-radius:12px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  transition:all .18s;
}
.ctrl-btn:hover{background:rgba(10,74,138,.13);transform:translateY(-1px)}
.ctrl-btn:active{transform:translateY(0) scale(.96)}
.ctrl-btn:disabled{opacity:.34;cursor:not-allowed;transform:none}
#slider{
  flex:1;max-width:300px;height:6px;-webkit-appearance:none;appearance:none;
  background:rgba(10,74,138,.13);border-radius:3px;outline:none;cursor:pointer;
}
#slider::-webkit-slider-thumb{
  -webkit-appearance:none;appearance:none;
  width:19px;height:19px;border-radius:50%;
  background:linear-gradient(135deg,var(--brand),var(--brand2));
  cursor:pointer;box-shadow:0 2px 8px rgba(10,74,138,.36);
}
#slider::-moz-range-thumb{
  width:19px;height:19px;border-radius:50%;border:none;
  background:linear-gradient(135deg,var(--brand),var(--brand2));
  cursor:pointer;box-shadow:0 2px 8px rgba(10,74,138,.36);
}
.hint{
  position:absolute;bottom:84px;left:50%;transform:translateX(-50%);
  font-size:11.5px;color:#93a2b6;letter-spacing:.3px;
  pointer-events:none;z-index:390;transition:opacity .8s;text-align:center;
}
.hint.fade{opacity:0}

.jump-toast{
  position:fixed;top:50%;left:50%;transform:translate(-50%,-50%) scale(.9);
  padding:16px 28px;border-radius:16px;
  background:rgba(10,26,52,.92);color:#fff;
  font-size:15px;font-weight:600;letter-spacing:.5px;
  z-index:600;opacity:0;pointer-events:none;
  transition:opacity .22s,transform .22s;
  backdrop-filter:blur(10px);text-align:center;
}
.jump-toast.show{opacity:1;transform:translate(-50%,-50%) scale(1)}
.jump-toast small{display:block;font-size:12px;font-weight:400;opacity:.72;margin-top:5px}

/* ---------- 抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(8,18,34,.42);
  backdrop-filter:blur(3px);opacity:0;pointer-events:none;transition:opacity .26s;z-index:500;
}
.drawer-mask.show{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(390px,88vw);z-index:520;
  background:#fff;box-shadow:-10px 0 40px rgba(10,30,60,.18);
  transform:translateX(100%);transition:transform .3s cubic-bezier(.32,.72,0,1);
  display:flex;flex-direction:column;
}
.drawer.show{transform:translateX(0)}
.drawer-head{
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 20px 14px;border-bottom:1px solid var(--line);flex:none;
}
.drawer-head h2{font-size:17px;color:var(--brand);font-weight:700}
.drawer-close{
  width:32px;height:32px;border:none;background:rgba(10,74,138,.06);
  color:var(--muted);border-radius:9px;font-size:20px;line-height:1;cursor:pointer;transition:all .18s;
}
.drawer-close:hover{background:rgba(10,74,138,.12);color:var(--brand)}
.drawer-search{
  display:flex;align-items:center;gap:9px;margin:14px 18px 10px;
  padding:9px 13px;background:rgba(10,74,138,.05);
  border-radius:11px;color:var(--muted);flex:none;
  border:1px solid transparent;transition:border-color .18s;
}
.drawer-search:focus-within{border-color:rgba(10,74,138,.24);background:#fff}
.drawer-search input{
  flex:1;border:none;background:transparent;outline:none;
  font-size:13.5px;color:var(--ink);font-family:inherit;
}
.drawer-search input::placeholder{color:#a8b4c4}
.drawer-body{flex:1;overflow-y:auto;padding:6px 14px 24px;-webkit-overflow-scrolling:touch}

.toc-chapter{margin:16px 0 8px}
.toc-ch-title{
  display:flex;align-items:center;gap:9px;
  font-size:13px;font-weight:700;color:#fff;
  padding:8px 12px;border-radius:10px;cursor:pointer;transition:filter .15s;
}
.toc-ch-title:hover{filter:brightness(1.08)}
.toc-ch-no{font-size:11px;background:rgba(255,255,255,.22);padding:2px 7px;border-radius:999px;flex:none}
.toc-ch-range{margin-left:auto;font-size:10.5px;opacity:.75;font-weight:400}
.toc-item{
  display:flex;align-items:center;gap:10px;
  padding:9px 12px;border-radius:9px;cursor:pointer;
  font-size:13px;color:var(--ink);transition:background .15s;
}
.toc-item:hover{background:rgba(10,74,138,.06)}
.toc-item.active{background:linear-gradient(135deg,rgba(10,74,138,.10),rgba(46,127,214,.10));color:var(--brand);font-weight:600}
.toc-item .pno{
  flex:none;width:28px;height:22px;border-radius:6px;
  background:rgba(10,74,138,.07);color:var(--brand);font-size:10.5px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.toc-item .ptitle{flex:none;max-width:52%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.toc-item .psum{flex:1;font-size:11px;color:#9aa8ba;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.toc-empty{padding:34px 20px;text-align:center;color:#a8b4c4;font-size:13px;line-height:1.8}
mark{background:rgba(255,214,0,.36);color:inherit;border-radius:2px;padding:0 1px}

/* ---------- 弹窗 ---------- */
.modal-mask{
  position:fixed;inset:0;background:rgba(8,18,34,.5);backdrop-filter:blur(5px);
  display:flex;align-items:center;justify-content:center;
  opacity:0;pointer-events:none;transition:opacity .24s;z-index:550;padding:20px;
}
.modal-mask.show{opacity:1;pointer-events:auto}
.modal{
  position:relative;background:#fff;border-radius:18px;
  padding:30px 28px 26px;max-width:400px;width:100%;
  box-shadow:0 20px 60px rgba(8,20,40,.32);
  transform:translateY(14px) scale(.97);transition:transform .26s cubic-bezier(.32,.72,0,1);
}
.modal-mask.show .modal{transform:translateY(0) scale(1)}
.modal h3{font-size:18px;color:var(--brand);font-weight:700;margin-bottom:5px}
.modal-close{
  position:absolute;top:14px;right:14px;width:30px;height:30px;
  border:none;background:rgba(10,74,138,.06);color:var(--muted);
  border-radius:8px;font-size:19px;line-height:1;cursor:pointer;transition:all .18s;
}
.modal-close:hover{background:rgba(10,74,138,.13);color:var(--brand)}
.share-sub{font-size:12.5px;color:var(--muted);margin-bottom:16px}
.qr-box{
  display:flex;align-items:center;justify-content:center;
  padding:14px;background:#fff;border:1px solid var(--line);
  border-radius:14px;margin-bottom:14px;
}
#shareCanvas{width:200px;height:200px;image-rendering:pixelated}
.share-link{
  font-size:11px;color:var(--muted);text-align:center;
  background:rgba(10,74,138,.05);padding:8px 12px;border-radius:9px;
  word-break:break-all;margin-bottom:14px;line-height:1.5;
}
.share-actions{display:flex;gap:9px;margin-bottom:12px}
.btn-primary{
  flex:1;padding:11px;border-radius:11px;font-size:13.5px;font-weight:600;
  border:none;cursor:pointer;transition:all .18s;font-family:inherit;
  background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;
  box-shadow:0 4px 14px rgba(10,74,138,.28);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 18px rgba(10,74,138,.34)}
.btn-primary.done{background:linear-gradient(135deg,#1a8a4a,#2fb872)}
.share-tip{font-size:11px;color:#9aa8ba;text-align:center;line-height:1.6}

/* ---------- 全屏 ---------- */
:fullscreen .topbar,:fullscreen .controls,:fullscreen .hint,:fullscreen .corner-hint{opacity:0;pointer-events:none}
:fullscreen .stage{top:0;bottom:0;padding:16px}
:-webkit-full-screen .topbar,:-webkit-full-screen .controls,
:-webkit-full-screen .hint,:-webkit-full-screen .corner-hint{opacity:0;pointer-events:none}

/* ---------- 响应式 ---------- */
@media (max-width:900px){
  .stage{padding:14px 10px}
}
@media (max-width:768px){
  .topbar{height:48px;padding:0 10px;gap:6px}
  .brand-text{font-size:13.5px}
  .chapter-chip{max-width:96px;font-size:11px;padding:4px 9px}
  .icon-btn{width:31px;height:31px}
  .indicator{font-size:11.5px;padding:4px 8px}
  .stage{top:48px;bottom:70px}
  .controls{height:70px;gap:6px;padding:0 10px}
  .ctrl-btn{width:38px;height:38px}
  #slider{max-width:150px}
  .hint{font-size:10.5px;bottom:76px;padding:0 16px}
  .modal{padding:26px 20px 22px}
}
@media (max-width:560px){
  .chapter-chip{display:none}
  #flipBtn{display:none}   /* 手机上翻页音效默认开，隐藏按钮省空间 */
}
@media (max-width:400px){
  .brand-text{display:none}
}