/**
 * AMU Culture Magazine - 样式文件
 *
 * 结构说明：
 * 1. 顶部基础样式控制整体背景、顶栏、目录、书本容器和底部控制条。
 * 2. V47-V65 为历史迭代保留样式，主要解决 PageFlip 圆角、移动端单页、平板横竖屏识别。
 * 3. V74 为当前最终规则：移动端禁止缩放，固定比例显示，只保留翻页。
 *
 * 维护提示：
 * - 桌面/移动端最终以 body.reading-desktop 和 body.reading-mobile 为准。
 * - 早期 @media 规则可以保留作为兜底，但不要覆盖 V74 的移动端固定缩放规则。
 */
:root{--ink:#172238;--blue:#173a66;--page-w:min(42vw,560px);--page-h:calc(var(--page-w)*1.414);}*{box-sizing:border-box}html,body{margin:0;width:100%;height:100%;overflow:hidden;font-family:"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:#e7f5ff}.bg{position:fixed;inset:0;overflow:hidden;background:radial-gradient(circle at 82% 13%,rgba(255,245,190,.98) 0 5%,rgba(255,216,124,.58) 6% 13%,rgba(255,196,89,.22) 14% 25%,transparent 36%),linear-gradient(145deg,#2d85db 0%,#78c7ff 32%,#fff2c9 69%,#f8fcff 100%)}.bg:after{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at 82% 18%,rgba(255,255,255,.34),transparent 28%),linear-gradient(0deg,rgba(255,255,255,.82),rgba(255,255,255,.13) 48%,rgba(255,255,255,.02));backdrop-filter:blur(.2px)}.sun{position:absolute;right:7%;top:6%;width:260px;height:260px;border-radius:50%;background:radial-gradient(circle,#fffceb 0 12%,#ffd98b99 13% 32%,#ffc65c44 33% 55%,transparent 72%);filter:blur(.6px);animation:pulse 7s ease-in-out infinite}.mist{position:absolute;width:72vw;height:28vh;left:8vw;bottom:7vh;background:radial-gradient(ellipse at center,rgba(255,255,255,.78),transparent 70%);filter:blur(28px);animation:drift 25s linear infinite;opacity:.72}.mist-b{bottom:28vh;left:-20vw;animation-duration:37s;opacity:.46}.mountain{position:absolute;bottom:0;width:120vw;height:43vh;left:-10vw;background:linear-gradient(135deg,transparent 0 28%,rgba(0,44,88,.22) 29% 39%,transparent 40%),linear-gradient(45deg,transparent 0 32%,rgba(6,56,98,.32) 33% 47%,transparent 48%);clip-path:polygon(0 100%,8% 72%,17% 92%,27% 50%,39% 89%,50% 56%,64% 90%,76% 48%,88% 86%,100% 62%,100% 100%);opacity:.58}.mountain-b{bottom:-4vh;height:31vh;opacity:.36;filter:blur(4px)}#particles{position:absolute;inset:0;z-index:2;opacity:.64}@keyframes pulse{50%{transform:scale(1.08);opacity:.78}}@keyframes drift{from{transform:translateX(-10vw)}to{transform:translateX(35vw)}}.topbar{position:fixed;z-index:1200;top:0;left:0;right:0;height:64px;display:flex;justify-content:space-between;align-items:center;padding:12px 22px;color:#173052;background:linear-gradient(180deg,rgba(255,255,255,.52),rgba(255,255,255,0))}.brand{display:flex;gap:12px;align-items:center}.mark{width:52px;height:34px;border:1px solid rgba(255,255,255,.88);border-radius:14px;display:grid;place-items:center;font-weight:700;background:rgba(255,255,255,.5);backdrop-filter:blur(8px)}.title{font-size:19px;font-weight:700;letter-spacing:.08em}.sub{font-size:11px;opacity:.74;letter-spacing:.12em;margin-top:2px}button{border:0;border-radius:999px;padding:9px 14px;background:rgba(255,255,255,.84);color:#163052;box-shadow:0 8px 24px rgba(13,37,74,.16);cursor:pointer;transition:.25s;font-weight:600;white-space:nowrap}button:hover{transform:translateY(-2px);background:#fff}.actions{display:flex;gap:9px;align-items:center}.mobile-only{display:none}.stage{position:relative;z-index:5;height:100vh;display:grid;grid-template-columns:240px 1fr;align-items:center;padding:66px 8px 58px 8px;gap:10px}.toc{align-self:center;width:210px;padding:18px 15px;border:1px solid rgba(255,255,255,.44);border-radius:24px;background:rgba(255,255,255,.38);box-shadow:0 28px 80px rgba(4,28,62,.14);backdrop-filter:blur(14px)}.toc-title{font-size:24px;font-weight:700;margin-bottom:12px;letter-spacing:.18em}.toc button{width:100%;margin:6px 0;text-align:left;background:rgba(255,255,255,.68);font-size:13px;padding:10px 12px;border-radius:14px;box-shadow:none}.toc button.active{background:#183a65;color:#fff}.book-wrap{height:100%;display:grid;place-items:center;position:relative;min-width:0}.pageflip-book{width:min(90vw,1380px);height:min(86vh,920px);filter:drop-shadow(0 30px 45px rgba(2,22,48,.28));}.pageflip-book .page{background:#fff;overflow:hidden;border-radius:18px!important;box-shadow:0 10px 28px rgba(2,22,48,.10)}.pageflip-book .page img{width:100%;height:100%;object-fit:cover;display:block;user-select:none;-webkit-user-drag:none;border-radius:18px;pointer-events:none}.engine-notice{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);background:rgba(255,255,255,.72);border-radius:999px;padding:10px 18px;color:#173052;font-weight:700;box-shadow:0 12px 30px rgba(2,22,48,.12)}.engine-notice.hide{display:none}.controls{position:fixed;z-index:1000;left:50%;bottom:13px;transform:translateX(-50%);display:flex;align-items:center;gap:14px;padding:10px 15px;border-radius:999px;background:rgba(255,255,255,.40);backdrop-filter:blur(14px);box-shadow:0 14px 45px rgba(3,21,48,.17)}input[type=range]{width:280px;accent-color:#173a66}.counter{min-width:70px;text-align:center;font-weight:700;color:#173052}.page-pop{position:fixed;left:50%;top:50%;z-index:1500;transform:translate(-50%,-50%);font-size:40px;color:#fff;text-shadow:0 10px 30px rgba(0,0,0,.35);letter-spacing:.12em;pointer-events:none;animation:pop 1s ease forwards}@keyframes pop{0%{opacity:0;transform:translate(-50%,-44%) scale(.92)}30%{opacity:1}100%{opacity:0;transform:translate(-50%,-58%) scale(1.04)}}@media(max-width:900px), (pointer:coarse){.topbar{height:58px;padding:8px 10px}.mark{width:44px;height:30px;border-radius:12px;font-size:13px}.title{font-size:15px}.sub{display:none}.actions{gap:6px}.actions button{padding:7px 10px;font-size:12px}.mobile-only{display:inline-flex}.stage{display:block;height:100vh;padding:68px 10px 72px}.toc{position:fixed;z-index:1301!important;left:10px;top:62px;bottom:74px;width:min(80vw,320px);overflow:auto;transform:translateX(calc(-100% - 20px));transition:transform .28s ease;background:rgba(255,255,255,.88);backdrop-filter:blur(18px)}body.nav-open .toc{transform:translateX(0)}.toc-title{font-size:24px}.toc button{font-size:15px;padding:12px 14px}.book-wrap{height:100%}.pageflip-book{width:calc(100vw - 22px);height:calc(100vh - 146px);filter:drop-shadow(0 24px 34px rgba(2,22,48,.22))}.controls{width:calc(100vw - 20px);bottom:10px;padding:8px 10px;gap:8px;border-radius:20px}.controls button{font-size:12px;padding:8px 10px}.controls input{flex:1;width:auto;min-width:0}.counter{font-size:12px;min-width:54px}.engine-notice{font-size:12px}}

/* V47 page flip polish */
.pageflip-book, .pageflip-book *{ -webkit-tap-highlight-color: transparent; }
.stf__block, .stf__item, .stf__page, .stf__wrapper{border-radius:18px!important;}
.stf__item{overflow:hidden!important;}
.pageflip-book .page{touch-action:none;}
@media(min-width:901px) and (pointer:fine){.pageflip-book{cursor:grab}.pageflip-book:active{cursor:grabbing}}
@media(max-width:900px), (pointer:coarse){.pageflip-book .page, .pageflip-book .page img{border-radius:14px!important}.stf__block,.stf__item,.stf__page,.stf__wrapper{border-radius:14px!important;}.pageflip-book .page{touch-action:none;}}


/* V49 fixes: keep desktop real book corners and force reliable mobile single-page sizing */
@media(min-width:901px) and (pointer:fine){
  .pageflip-book{cursor:grab;border-radius:20px;overflow:visible;}
  .pageflip-book:active{cursor:grabbing}
  .pageflip-book .page,
  .pageflip-book .page img{border-radius:0!important;}
  .pageflip-book .page.book-left,
  .pageflip-book .page.book-left img{border-radius:20px 0 0 20px!important;}
  .pageflip-book .page.book-right,
  .pageflip-book .page.book-right img{border-radius:0 20px 20px 0!important;}
  .stf__block,.stf__item,.stf__page,.stf__wrapper{border-radius:0!important;}
  .stf__item{overflow:hidden!important;}
}
@media(max-width:900px), (pointer:coarse){
  .pageflip-book{width:auto;height:auto;max-width:720px;border-radius:16px!important;overflow:visible!important;}
  .pageflip-book .page,
  .pageflip-book .page img,
  .stf__block,
  .stf__item,
  .stf__page,
  .stf__wrapper{border-radius:16px!important;}
  .stf__item{overflow:hidden!important;}
  .pageflip-book .page{touch-action:none;}
}


/* V60: desktop zoom + mobile 50/50 touch zones */
.desktop-only{display:inline-flex;}
.zoom-control{align-items:center;gap:6px;padding:5px 8px;border-radius:999px;background:rgba(255,255,255,.50);backdrop-filter:blur(10px);box-shadow:0 8px 24px rgba(13,37,74,.12)}
.zoom-control button{width:30px;height:30px;padding:0;display:grid;place-items:center;font-size:18px;line-height:1;box-shadow:none;background:rgba(255,255,255,.82)}
.zoom-control input{width:220px;accent-color:#173a66}
.zoom-control span{font-size:12px;font-weight:700;color:#173052;min-width:38px;text-align:center}
.pageflip-book{transition:transform .22s ease;transform-origin:center center;}
.mobile-touch-layer{display:none;position:absolute;z-index:1250;left:50%;top:50%;transform:translate(-50%,-50%);width:var(--mobile-book-w,85vw);height:var(--mobile-book-h,70vh);border-radius:18px;touch-action:none;background:transparent;}
@media(max-width:900px), (pointer:coarse){
  .desktop-only{display:none!important;}
  .mobile-touch-layer{display:block;}
  .pageflip-book{transform:none!important;}
}


/* V61: mobile native engine touch fix */
.mobile-touch-layer{display:none!important;pointer-events:none!important;}
@media(max-width:900px), (pointer:coarse){
  .pageflip-book,
  .pageflip-book *{touch-action:none!important;-webkit-user-select:none;user-select:none;}
  .pageflip-book img{pointer-events:none!important;-webkit-user-drag:none;user-select:none;}
  .pageflip-book{width:var(--mobile-book-w,85vw)!important;height:var(--mobile-book-h,70vh)!important;}
}

.pageflip-book,.pageflip-book *{touch-action:none;}


/* V63: tablet portrait/landscape mode is controlled by JS classes, not by pointer:coarse alone */
body.reading-mobile .topbar{height:58px;padding:8px 10px}
body.reading-mobile .mark{width:44px;height:30px;border-radius:12px;font-size:13px}
body.reading-mobile .title{font-size:15px}
body.reading-mobile .sub{display:none}
body.reading-mobile .actions{gap:6px}
body.reading-mobile .actions button{padding:7px 10px;font-size:12px}
body.reading-mobile .mobile-only{display:inline-flex!important}
body.reading-mobile .desktop-only{display:none!important}
body.reading-mobile .stage{display:block;height:100vh;padding:60px 6px 58px;grid-template-columns:none}
body.reading-mobile .toc{position:fixed;z-index:1301!important;left:10px;top:62px;bottom:74px;width:min(80vw,320px);overflow:auto;transform:translateX(calc(-100% - 20px));transition:transform .28s ease;background:rgba(255,255,255,.88);backdrop-filter:blur(18px)}
body.reading-mobile.nav-open .toc{transform:translateX(0)}
body.reading-mobile .book-wrap{height:100%}
body.reading-mobile .pageflip-book{width:var(--mobile-book-w,92vw)!important;height:var(--mobile-book-h,calc(100vh - 118px))!important;filter:drop-shadow(0 24px 34px rgba(2,22,48,.22))}
body.reading-mobile .pageflip-book,
body.reading-mobile .pageflip-book *{touch-action:none!important;-webkit-user-select:none;user-select:none}
body.reading-mobile .pageflip-book .page,
body.reading-mobile .pageflip-book .page img,
body.reading-mobile .stf__block,
body.reading-mobile .stf__item,
body.reading-mobile .stf__page,
body.reading-mobile .stf__wrapper{border-radius:16px!important}
body.reading-mobile .controls{width:calc(100vw - 20px);bottom:10px;padding:8px 10px;gap:8px;border-radius:20px}
body.reading-mobile .controls button{font-size:12px;padding:8px 10px}
body.reading-mobile .controls input{flex:1;width:auto;min-width:0}
body.reading-mobile .counter{font-size:12px;min-width:54px}

body.reading-desktop .topbar{height:64px;padding:12px 22px}
body.reading-desktop .mark{width:52px;height:34px;border-radius:14px;font-size:initial}
body.reading-desktop .title{font-size:19px}
body.reading-desktop .sub{display:block}
body.reading-desktop .mobile-only{display:none!important}
body.reading-desktop .desktop-only{display:inline-flex!important}
body.reading-desktop .stage{position:relative;z-index:5;height:100vh;display:grid;grid-template-columns:240px 1fr;align-items:center;padding:66px 8px 58px 8px;gap:10px}
body.reading-desktop .toc{position:static;align-self:center;width:210px;padding:18px 15px;transform:none!important;overflow:visible;background:rgba(255,255,255,.38);backdrop-filter:blur(14px)}
body.reading-desktop .book-wrap{height:100%;display:grid;place-items:center}
body.reading-desktop .pageflip-book{width:min(90vw,1380px)!important;height:min(86vh,920px)!important;filter:drop-shadow(0 30px 45px rgba(2,22,48,.28));touch-action:none}
body.reading-desktop .pageflip-book .page,
body.reading-desktop .pageflip-book .page img{border-radius:0!important}
body.reading-desktop .pageflip-book .page.book-left,
body.reading-desktop .pageflip-book .page.book-left img{border-radius:20px 0 0 20px!important}
body.reading-desktop .pageflip-book .page.book-right,
body.reading-desktop .pageflip-book .page.book-right img{border-radius:0 20px 20px 0!important}
body.reading-desktop .stf__block,
body.reading-desktop .stf__item,
body.reading-desktop .stf__page,
body.reading-desktop .stf__wrapper{border-radius:0!important}
body.reading-desktop .controls{width:auto;bottom:13px;padding:10px 15px;gap:14px;border-radius:999px}
body.reading-desktop .controls input{width:280px;flex:initial}
body.reading-desktop .counter{font-size:initial;min-width:70px}


/* V64: mode lock - tablet portrait/landscape follows JS classes only */
html, body{width:100%;height:100%;overflow:hidden;}
body.reading-mobile .desktop-only{display:none!important;}
body.reading-mobile .mobile-only{display:inline-flex!important;}
body.reading-desktop .desktop-only{display:inline-flex!important;}
body.reading-desktop .mobile-only{display:none!important;}
body.reading-mobile .stage{display:block!important;height:100vh!important;padding:60px 6px 58px!important;grid-template-columns:none!important;}
body.reading-desktop .stage{display:grid!important;grid-template-columns:240px 1fr!important;padding:66px 8px 58px 8px!important;}
body.reading-mobile .toc{position:fixed!important;z-index:1301!important;left:10px!important;top:62px!important;bottom:74px!important;width:min(80vw,320px)!important;overflow:auto!important;transform:translateX(calc(-100% - 20px))!important;}
body.reading-mobile.nav-open .toc{transform:translateX(0)!important;}
body.reading-desktop .toc{position:static!important;transform:none!important;width:210px!important;overflow:visible!important;}
body.reading-mobile .book-wrap{height:100%!important;display:grid!important;place-items:center!important;}
body.reading-mobile .pageflip-book{width:var(--mobile-book-w,92vw)!important;height:var(--mobile-book-h,calc(100vh - 118px))!important;max-width:none!important;}
body.reading-desktop .pageflip-book{width:min(90vw,1380px)!important;height:min(86vh,920px)!important;max-width:none!important;}
body.reading-desktop .zoom-control input{width:360px!important;}
body.reading-desktop .controls input{width:360px!important;}


/* V65: final tablet portrait fallback + remove fullscreen */
#fsBtn{display:none!important;}
@media (orientation: portrait) and (min-width:560px) and (max-width:1180px) and (min-height:760px) and (max-height:1500px){
  body:not(.reading-desktop) .desktop-only{display:none!important;}
  body:not(.reading-desktop) .mobile-only{display:inline-flex!important;}
}
body.reading-mobile .pageflip-book{width:var(--mobile-book-w,92vw)!important;height:var(--mobile-book-h,calc(100vh - 118px))!important;}
body.reading-mobile .toc{position:fixed!important;}
body.reading-mobile .stage{display:block!important;grid-template-columns:none!important;}
body.reading-desktop .stage{display:grid!important;}

/* V74: mobile zoom disabled. Keep fixed scale and only allow page-turn gestures. */
/* V76: mobile view larger; JS writes exact safe size, CSS keeps a 92vw fallback without changing desktop. */
body.reading-mobile .pageflip-book{
  transform:none!important;
  transform-origin:center center!important;
}
body.reading-mobile .book-wrap{
  overflow:visible!important;
}
body.reading-mobile .pageflip-book,
body.reading-mobile .pageflip-book *{
  touch-action:none!important;
}