/* 仅知识库的书本选择界面；不命中机器人、原卡片布局或其他弹窗。 */
#knowledge-book{width:min(850px,calc(100% - 20px));max-height:calc(100dvh - 24px);padding:42px 27px 24px;border:0;border-radius:18px;background:transparent;box-shadow:none;overflow-x:hidden;color:var(--ink);text-align:left;cursor:auto!important}#knowledge-book *{cursor:auto!important}#knowledge-book a,#knowledge-book button{cursor:pointer!important}#knowledge-book::backdrop{background:var(--ink);opacity:.34}
#knowledge-book .kb-close{position:absolute;right:22px;top:0;width:44px;height:44px;border:1px solid var(--line);border-radius:50%;background:var(--paper);color:var(--ink);font-size:22px;z-index:4}
#knowledge-book .kb-volume{position:relative;display:grid;grid-template-columns:1fr 1fr;perspective:1600px;isolation:isolate;min-height:368px}
#knowledge-book .kb-page{position:relative;display:flex;flex-direction:column;min-width:0;padding:30px 26px 24px;background:var(--paper);border:1px solid var(--line);border-bottom:7px double var(--robot-bodyLight);box-shadow:0 12px 25px var(--shadow)}
#knowledge-book .kb-page:first-child{border-radius:12px 0 0 12px;background:linear-gradient(90deg,var(--paper) 93%,var(--line));transform-origin:right center}#knowledge-book .kb-page:nth-child(2){border-radius:0 12px 12px 0;background:linear-gradient(90deg,var(--line),var(--paper) 7%)}
#knowledge-book .kb-index{font:9px ui-monospace,SFMono-Regular,monospace;letter-spacing:1.6px;color:var(--muted);margin-bottom:24px}#knowledge-book .kb-mark{width:44px;height:44px;color:var(--cyan);margin-bottom:22px}#knowledge-book .kb-page:nth-child(2) .kb-mark{color:var(--accentText)}#knowledge-book h2{font-size:23px;font-weight:550;letter-spacing:.5px;margin:0 0 15px}#knowledge-book .kb-description{font-size:12px;color:var(--muted);line-height:1.9;margin:0 0 26px;max-width:230px}#knowledge-book .kb-link{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:48px;padding:11px 14px;border:1px solid var(--line);border-radius:8px;font-size:12px;background:var(--bg)}#knowledge-book .kb-link:hover{border-color:var(--accent);color:var(--accentText)}#knowledge-book .kb-link svg{width:15px;height:15px}#knowledge-book .kb-folio{font:9px ui-monospace,monospace;color:var(--muted);margin-top:18px;text-align:right}
#knowledge-book .kb-cover{position:absolute;inset:0 0 0 50%;padding:30px;display:flex;flex-direction:column;align-items:center;justify-content:center;border:1px solid var(--robot-bodyDark);border-left:7px solid var(--robot-bodyDark);border-radius:2px 12px 12px 2px;background:linear-gradient(135deg,var(--robot-accentMint),var(--robot-bodyLight));transform-origin:left center;backface-visibility:hidden;z-index:3;box-shadow:0 12px 25px var(--shadow);pointer-events:none;color:var(--ink)}#knowledge-book .kb-cover svg{width:82px;height:100px;margin:22px 0;color:var(--robot-accentCream)}#knowledge-book .kb-cover strong{font-size:25px;letter-spacing:5px;font-weight:550}#knowledge-book .kb-cover small{font:9px ui-monospace,monospace;letter-spacing:2px}#knowledge-book .kb-note{margin:20px 0 0;text-align:center;color:var(--paper);font-size:11px;letter-spacing:1px}
/* 1秒翻开：书封绕书脊转动，内页只做 transform/opacity，无逐帧布局。 */
#knowledge-book.kb-open .kb-volume{animation:kb-settle var(--kb-duration,1000ms) cubic-bezier(.22,.7,.2,1) both}#knowledge-book.kb-open .kb-cover{animation:kb-cover-open var(--kb-duration,1000ms) cubic-bezier(.22,.7,.2,1) both}#knowledge-book.kb-open .kb-page:first-child{animation:kb-left-open var(--kb-duration,1000ms) cubic-bezier(.22,.7,.2,1) both}#knowledge-book.kb-open .kb-page-content{animation:kb-content var(--kb-duration,1000ms) ease both;display:flex;flex-direction:column;flex:1}
@keyframes kb-settle{from{transform:translateX(-23%) scale(.9)}to{transform:translateX(0) scale(1)}}@keyframes kb-cover-open{0%,8%{transform:rotateY(0)}100%{transform:rotateY(-180deg)}}@keyframes kb-left-open{0%,12%{transform:rotateY(90deg);opacity:0}60%{opacity:1}100%{transform:rotateY(0);opacity:1}}@keyframes kb-content{0%,55%{opacity:0;transform:translateY(6px)}100%{opacity:1;transform:translateY(0)}}
#knowledge-book.kb-static .kb-volume,#knowledge-book.kb-static .kb-page,#knowledge-book.kb-static .kb-page-content{animation:none!important;transform:none!important;opacity:1!important}#knowledge-book.kb-static .kb-cover{animation:none!important;transform:rotateY(-180deg)}
@media(max-width:600px){#knowledge-book{padding:48px 13px 18px}#knowledge-book .kb-page{padding:23px 15px 16px;min-height:335px}#knowledge-book h2{font-size:16px;line-height:1.5}#knowledge-book .kb-index{font-size:7px;letter-spacing:.7px;margin-bottom:22px}#knowledge-book .kb-description{font-size:11px;line-height:1.8}#knowledge-book .kb-link{padding:10px;font-size:11px}#knowledge-book .kb-cover{padding:14px}#knowledge-book .kb-cover strong{font-size:20px;letter-spacing:2px}#knowledge-book .kb-cover small{font-size:7px;letter-spacing:.8px}#knowledge-book .kb-note{font-size:10px}#knowledge-book .kb-mark{width:36px;height:36px}}
@media(prefers-reduced-motion:reduce){#knowledge-book .kb-volume,#knowledge-book .kb-page,#knowledge-book .kb-page-content{animation:none!important;transform:none!important;opacity:1!important}#knowledge-book .kb-cover{animation:none!important;transform:rotateY(-180deg)}}
/* 双页书签扩展：所有规则限定在此书本，不影响原页面的卡片与机器人。 */
#knowledge-book{width:min(980px,calc(100% - 20px));padding-top:76px}
#knowledge-book .kb-page{padding:34px 32px 24px;min-height:490px}
#knowledge-book .kb-fixed .kb-mark{margin-top:10px;margin-bottom:26px}
#knowledge-book .kb-fixed h2{font-size:28px}
#knowledge-book .kb-description{max-width:none}
#knowledge-book .kb-keywords{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:22px}
#knowledge-book .kb-keywords span{font-size:10px;padding:6px 9px;border:1px solid var(--line);border-radius:4px;color:var(--muted)}
#knowledge-book .kb-margin-note{font-size:12px;line-height:2;letter-spacing:1px;color:var(--muted);padding-left:13px;border-left:2px solid var(--robot-coreLight);margin:4px 0 32px}
#knowledge-book .kb-tabs{position:absolute;top:-43px;right:21px;display:flex;gap:8px;z-index:2}
#knowledge-book .kb-tabs button{min-height:47px;padding:12px 18px 16px;border:1px solid var(--line);border-bottom:0;border-radius:9px 9px 0 0;background:var(--robot-accentMint);color:var(--ink);font-size:12px;opacity:.7;transform:translateY(6px);transition:transform .2s,opacity .2s}
#knowledge-book .kb-tabs button[data-book-tab=companies]{background:var(--robot-accentLilac)}
#knowledge-book .kb-tabs button[aria-selected=true]{opacity:1;transform:translateY(0);font-weight:600}
#knowledge-book .kb-tabs button[aria-selected=false]:hover{transform:translateY(3px);opacity:.9}
#knowledge-book .kb-tabs button:focus-visible,#knowledge-book .kb-panel:focus-visible{outline:2px solid var(--accentText);outline-offset:3px}
#knowledge-book .kb-panels{display:grid;flex:1;min-width:0}
#knowledge-book .kb-panel{grid-area:1/1;display:flex;flex-direction:column;min-width:0}
#knowledge-book .kb-panel[hidden]{display:none}
#knowledge-book .kb-panel .kb-index{margin-bottom:18px}
#knowledge-book .kb-panel h2{font-size:21px;line-height:1.5}
#knowledge-book .kb-panel .kb-description{margin-bottom:20px}
#knowledge-book .kb-previews{margin-bottom:24px}
#knowledge-book .kb-robot-previews{display:grid;grid-template-columns:1fr 1fr;gap:12px}
#knowledge-book .kb-preview{display:flex;align-items:center;gap:12px;min-width:0;border:1px solid var(--line);border-radius:8px;background:var(--paper);overflow:hidden;font-size:11px;transition:transform .2s}
#knowledge-book .kb-preview:hover{transform:translateY(-2px)}
#knowledge-book .kb-preview:focus-visible{outline:2px solid var(--accentText);outline-offset:3px}
#knowledge-book .kb-preview img{display:block;object-fit:contain;background:var(--white);width:44px;height:44px;flex:none;border-radius:5px}
#knowledge-book .kb-preview b{display:block;font-size:11px;font-weight:550;line-height:1.5}
#knowledge-book .kb-preview small{display:block;color:var(--muted);font-size:9px;margin-top:4px;line-height:1.5}
#knowledge-book .kb-robot-previews .kb-preview{display:block;padding:0 0 11px}
#knowledge-book .kb-robot-previews img{width:100%;height:128px;object-fit:cover;object-position:50% 28%;border-radius:0}
#knowledge-book .kb-robot-previews .kb-preview-copy{display:block;padding:10px 11px 0}
#knowledge-book .kb-company-previews{display:grid;gap:8px}
#knowledge-book .kb-company-previews .kb-preview{padding:9px 12px}
#knowledge-book .kb-panel.kb-enter{animation:kb-tab-in var(--kb-tab-half,120ms) ease-out both}
#knowledge-book .kb-panel.kb-leave{animation:kb-tab-out var(--kb-tab-half,120ms) ease-in both;pointer-events:none}
@keyframes kb-tab-in{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
@keyframes kb-tab-out{from{opacity:1;transform:none}to{opacity:0;transform:translateY(-3px)}}
#knowledge-book.kb-static .kb-panel{animation:none!important}
html.motion-off #knowledge-book *{animation:none!important;transition:none!important}
@media(max-width:700px){
 #knowledge-book{padding:48px 12px 18px;width:calc(100% - 14px)}
 #knowledge-book .kb-volume{grid-template-columns:1fr;perspective:1400px}
 #knowledge-book .kb-page{padding:25px 23px;min-height:0}
 #knowledge-book .kb-page:first-child{border-radius:12px 12px 0 0;background:linear-gradient(180deg,var(--paper) 96%,var(--line))}
 #knowledge-book .kb-page:nth-child(2){border-radius:0 0 12px 12px;background:var(--paper)}
 #knowledge-book .kb-fixed .kb-index{margin-bottom:12px}
 #knowledge-book .kb-fixed .kb-mark,#knowledge-book .kb-margin-note,#knowledge-book .kb-fixed .kb-folio{display:none}
 #knowledge-book .kb-fixed h2{font-size:23px;margin-bottom:9px}
 #knowledge-book .kb-fixed .kb-description{margin-bottom:14px}
 #knowledge-book .kb-keywords{margin-bottom:16px}
 #knowledge-book .kb-tabs{position:relative;top:auto;right:auto;gap:8px;margin:-3px 0 22px;display:grid;grid-template-columns:1fr 1fr}
 #knowledge-book .kb-tabs button{border:1px solid var(--line);border-radius:6px;transform:none!important;padding:10px 8px;min-height:44px;font-size:12px}
 #knowledge-book .kb-panel{min-height:365px}
 #knowledge-book .kb-panel h2{font-size:20px}
 #knowledge-book .kb-index{font-size:9px;letter-spacing:1px}
 #knowledge-book .kb-link{font-size:12px}
 #knowledge-book .kb-cover{inset:0;padding:25px;border-radius:12px;justify-content:flex-start;padding-top:75px}
 #knowledge-book .kb-cover strong{font-size:26px}#knowledge-book .kb-cover small{font-size:9px}
 #knowledge-book .kb-note{font-size:10px;letter-spacing:0}
}
@media(prefers-reduced-motion:reduce){#knowledge-book .kb-panel,#knowledge-book .kb-tabs button,#knowledge-book .kb-preview{animation:none!important;transition:none!important}}

/* 原生dialog保留滚动，避免透明书本外侧出现不透明滚动条轨道。 */
#knowledge-book{scrollbar-width:none}#knowledge-book::-webkit-scrollbar{width:0;height:0}
#knowledge-book.kb-open .kb-tabs{animation:kb-content var(--kb-duration,1000ms) ease both}
#knowledge-book.kb-static .kb-tabs{animation:none!important}
@media(prefers-reduced-motion:reduce){#knowledge-book .kb-tabs{animation:none!important}}
#knowledge-book .kb-close{right:0}