/* Full-screen landscape booklet — no banner */
*{box-sizing:border-box}
body.book-page{margin:0;background:#07110E;color:#fff;overflow:hidden;font-family:"PingFang TC","Noto Sans TC",sans-serif}
.book-bg{position:fixed;inset:0;background:url(../assets/img/grass-field.jpg) center/cover no-repeat;filter:saturate(.9) brightness(.72);transform:scale(1.05);z-index:0}
.book-bg:after{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at 50% 45%,rgba(7,17,14,.04) 0%,rgba(7,17,14,.38) 55%,rgba(7,17,14,.82) 100%)}
.book-top{position:fixed;left:0;right:0;top:0;z-index:5;display:flex;justify-content:space-between;align-items:center;padding:18px 28px;background:linear-gradient(180deg,rgba(5,12,10,.75),transparent)}
.book-brand{display:flex;align-items:center;gap:12px;color:#fff;text-decoration:none}
.book-brand svg{width:28px;height:28px}
.book-brand b{display:block;font-size:13px;letter-spacing:.12em;font-weight:600}
.book-brand span{display:block;font-size:7px;letter-spacing:.18em;color:rgba(255,255,255,.5);margin-top:2px}
.book-top__right{display:flex;align-items:center;gap:14px;font-size:8px;letter-spacing:.13em;color:rgba(255,255,255,.55);text-transform:uppercase}
.book-top__right a{color:#E3C48F;text-decoration:none;border-bottom:1px solid rgba(227,196,143,.4);padding-bottom:2px}
.book-stage{position:fixed;inset:72px 0 74px;z-index:2;display:flex;align-items:center;justify-content:center;padding:0 34px}
.book-frame{position:relative;width:min(84vw,calc((100vh - 190px) * 1.776));aspect-ratio:1684/948;background:#F7FAFB;box-shadow:0 30px 90px rgba(0,0,0,.55);overflow:hidden}
.book-frame img{display:block;width:100%;height:100%;object-fit:contain;transition:opacity .22s ease}
.book-frame img.is-fading{opacity:.1}
.book-nav{position:absolute;top:50%;transform:translateY(-50%);z-index:4;width:44px;height:44px;border:1px solid rgba(255,255,255,.25);background:rgba(7,17,14,.45);color:#fff;display:grid;place-items:center;cursor:pointer;backdrop-filter:blur(8px);transition:background .2s}
.book-nav:hover{background:rgba(255,255,255,.9);color:#07110E}
.book-nav[disabled]{opacity:.2;pointer-events:none}
.book-nav--prev{left:12px}.book-nav--next{right:12px}
.book-nav svg{width:16px;height:16px}
.book-bottom{position:fixed;left:0;right:0;bottom:0;z-index:5;padding:14px 28px 20px;background:linear-gradient(0deg,rgba(5,12,10,.88),transparent);display:flex;align-items:center;gap:18px}
.book-bottom__left{display:flex;align-items:center;gap:8px;flex:none}
.book-bottom__mid{flex:1;display:flex;align-items:center;gap:12px}
.book-count{font-size:9px;letter-spacing:.16em;color:rgba(255,255,255,.65);min-width:58px;text-align:center}
.book-slider{-webkit-appearance:none;appearance:none;width:100%;height:18px;background:transparent;cursor:pointer}
.book-slider::-webkit-slider-runnable-track{height:1px;background:rgba(255,255,255,.25)}
.book-slider::-webkit-slider-thumb{-webkit-appearance:none;width:10px;height:10px;border-radius:50%;background:#C9A46A;margin-top:-4.5px;border:0}
.book-slider::-moz-range-track{height:1px;background:rgba(255,255,255,.25)}
.book-slider::-moz-range-thumb{width:10px;height:10px;border:0;border-radius:50%;background:#C9A46A}
.book-bottom__right{display:flex;align-items:center;gap:8px;flex:none}
.book-btn{width:32px;height:32px;border:1px solid rgba(255,255,255,.22);background:transparent;color:#fff;display:grid;place-items:center;cursor:pointer}
.book-btn:hover{background:#fff;color:#07110E}
.book-btn svg{width:13px;height:13px}
.book-dl{display:inline-flex;align-items:center;gap:6px;border:1px solid #C9A46A;background:#C9A46A;color:#07110E;font-size:8px;letter-spacing:.1em;text-decoration:none;padding:8px 10px}
.book-dl:hover{background:#fff;border-color:#fff}
.book-hint{position:fixed;left:28px;bottom:2px;z-index:5;font-size:7px;letter-spacing:.14em;color:rgba(255,255,255,.35);text-transform:uppercase}
@media(max-width:800px){
  .book-top{padding:12px 14px}
  .book-top__right{display:none}
  .book-stage{inset:54px 0 64px;padding:0 6px}
  .book-frame{width:100%;max-height:70vh}
  .book-nav{width:32px;height:32px}
  .book-nav--prev{left:4px}.book-nav--next{right:4px}
  .book-bottom{padding:10px 12px 16px;gap:8px;flex-wrap:wrap}
  .book-bottom__mid{order:3;flex:1 1 100%}
  .book-hint{display:none}
  .book-dl{padding:7px 8px}
}