:root{color-scheme:light;--bg:#f7f8fa;--surface:#fff;--ink:#273247;--muted:#6d7787;--line:#e1e6ec;--accent:#315b9b;--accent-soft:#eaf0f9;--reader:#f3f0e8;--shadow:0 18px 70px #192b4622;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg)}
*{box-sizing:border-box}body{margin:0}button,input,a{-webkit-tap-highlight-color:transparent}button,input{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}button{color:inherit}button:disabled{opacity:.5;cursor:wait}a{color:var(--accent)}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #80a4db;outline-offset:4px}svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.65;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}.icon-definitions{position:absolute;width:0;height:0;overflow:hidden}[hidden]{display:none!important}button{border:0;background:none}a{text-decoration:none}h1,h2,h3,p{margin-top:0}.primary-button,.secondary-button,.quiet-button,.icon-button,.text-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px}.primary-button,.secondary-button{padding:11px 19px;border-radius:8px;font-size:14px;font-weight:600}.primary-button{background:var(--accent);color:white}.primary-button:hover{background:#24477c}.secondary-button{border:1px solid var(--line);background:var(--surface)}.quiet-button{padding:8px 10px;color:var(--muted);font-size:13px}.quiet-button:hover,.icon-button:hover{background:var(--accent-soft);border-radius:6px;color:var(--accent)}.icon-button{width:44px;height:44px;flex-shrink:0}.text-button{font-size:14px;color:var(--accent);padding:8px 12px}.text-button:hover{text-decoration:underline}.library-layout{display:grid;grid-template-columns:232px minmax(0,1fr);min-height:100vh;min-height:100dvh}.library-sidebar{padding:38px 24px 24px;border-right:1px solid var(--line);display:flex;flex-direction:column;background:#eef2f7;position:sticky;top:0;height:100vh;height:100dvh}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);width:fit-content}.brand>span{font-size:25px;font-weight:650;letter-spacing:3px}.brand small{display:block;font-size:10px;color:var(--muted);letter-spacing:1px;font-weight:400;margin-top:4px}.brand img{border-radius:9px}.sidebar-selection{margin-top:54px;display:flex;gap:12px;align-items:center;padding:13px 12px;background:#e0e8f4;color:#294d81;border-radius:7px;font-size:14px}.sidebar-selection>span{margin-left:auto;font-size:12px;opacity:.7}.sidebar-bottom{margin-top:auto;font-size:11px;color:var(--muted)}.sidebar-bottom p{line-height:1.7;margin-bottom:10px}.status-dot{display:inline-block;width:5px;height:5px;border-radius:50%;background:#658570;margin-right:6px;vertical-align:2px}.sidebar-bottom .quiet-button{padding-left:0}.version{display:block;margin-top:16px;color:#8d96a2;font-size:10px}.library-main{position:relative;padding:64px clamp(28px,6vw,104px) 28px;max-width:1440px;width:100%;display:flex;flex-direction:column;min-width:0}.library-header{display:flex;align-items:center;justify-content:space-between;gap:16px}.section-caption{font-size:12px;color:var(--muted);margin-bottom:12px}.library-header h1{font-size:34px;font-weight:560;letter-spacing:2px;margin:0}.library-subhead{display:flex;justify-content:space-between;align-items:center;padding:24px 0;border-bottom:1px solid var(--line);gap:12px}.library-subhead p{font-size:13px;color:var(--muted);margin:0;line-height:1.7}.mobile-help{display:none}.empty-state{min-height:490px;flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:40px 0}.empty-state h2{font-size:23px;font-weight:500;margin-bottom:13px;letter-spacing:.5px}.empty-state>p{font-size:14px;color:var(--muted);line-height:1.9;margin-bottom:23px}.empty-state>.primary-button{min-width:160px}.empty-state>.text-button{margin-top:6px}.empty-state .import-hint{font-size:11px;margin:20px 0 0;color:#8a94a3}.paper-illustration{width:120px;height:137px;position:relative;margin-bottom:32px}.paper-back{position:absolute;inset:4px 9px 7px 4px;background:#dce5f1;transform:rotate(-10deg);border-radius:3px}.paper-front{position:absolute;inset:0 0 10px 13px;background:#fff;border:1px solid #dce3ed;box-shadow:0 8px 24px #30466a0a;border-radius:3px;padding:28px 15px 12px;transform:rotate(4deg)}.paper-front>span:not(.paper-bookmark){display:block;height:2px;background:#d6deea;margin:6px 0}.paper-front>.paper-heading{width:56%;height:4px!important;background:#8fa6c8!important;margin-bottom:12px!important}.paper-front>.paper-heading.second{margin-top:16px!important;margin-bottom:9px!important}.paper-front>.short{width:70%}.paper-bookmark{position:absolute;right:16px;top:-1px;width:12px;height:27px;background:#315b9b;clip-path:polygon(0 0,100% 0,100% 100%,50% 80%,0 100%)}.library-footer{margin-top:auto;padding-top:28px;display:flex;justify-content:space-between;gap:12px;color:#8792a0;font-size:11px;line-height:1.7}.continue-section{margin-top:28px;background:var(--accent-soft);border-left:3px solid #6280aa;padding:18px 22px}.continue-label{font-size:11px;color:#68809f;margin-bottom:5px}.continue-button{display:flex;align-items:center;justify-content:space-between;width:100%;text-align:left;gap:20px;padding:6px 0}.continue-button strong{display:block;font-size:18px;font-weight:500;line-height:1.6;overflow-wrap:anywhere}.continue-button small{display:block;font-size:12px;margin-top:8px;color:#6b7e98}.continue-button svg{color:#68809f}.book-list{margin-top:24px;margin-bottom:28px}.book-row{display:flex;align-items:center;gap:14px;border-bottom:1px solid var(--line);padding:20px 0}.book-open{display:flex;align-items:center;gap:20px;min-width:0;flex:1;text-align:left;padding:0}.book-spine{display:flex;align-items:center;justify-content:center;width:42px;height:58px;flex-shrink:0;border-radius:2px 5px 5px 2px;background:#dfe7f2;color:#6481a9;border-left:3px solid #87a0c3}.book-spine svg{width:20px;height:20px}.book-info{min-width:0}.book-info strong{display:block;font-size:16px;line-height:1.65;font-weight:500;overflow-wrap:anywhere}.book-info small{display:block;color:var(--muted);font-size:11px;line-height:1.8;margin-top:5px}.book-actions{display:flex;gap:0;flex-shrink:0;color:#7e8897}.book-actions .icon-button{width:38px}.book-actions svg{width:18px;height:18px}.drop-overlay{position:absolute;inset:16px;border:2px dashed #83a3cf;border-radius:10px;background:#eef4fff5;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:20px;z-index:10;color:var(--accent)}.drop-overlay svg{width:48px;height:48px}.reader-view{height:100vh;height:100dvh;display:flex;flex-direction:column;background:var(--reader)}.reader-toolbar{padding:8px max(16px,env(safe-area-inset-right)) 8px max(16px,env(safe-area-inset-left));padding-top:max(8px,env(safe-area-inset-top));display:flex;align-items:center;gap:20px;border-bottom:1px solid var(--line);background:var(--surface);flex-shrink:0}.back-library{white-space:nowrap;color:var(--ink)}.reader-title{min-width:0;flex:1;padding:0 8px}.reader-title strong{display:block;font-size:14px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;line-height:1.6}.reader-title span{font-size:10px;color:var(--muted);line-height:1.8}.toolbar-actions{display:flex;gap:4px}.type-button{font-family:Georgia,serif;font-size:22px}.reader-frame-wrap{flex:1;min-height:0;position:relative}#reader-frame{width:100%;height:100%;border:0;display:block;background:var(--reader)}.reader-loading{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:var(--muted);background:var(--reader);font-size:14px}.reader-footer{display:flex;align-items:center;justify-content:space-between;position:relative;min-height:42px;background:var(--surface);padding:0 max(24px,env(safe-area-inset-right)) max(0px,env(safe-area-inset-bottom)) max(16px,env(safe-area-inset-left));border-top:1px solid var(--line);flex-shrink:0;font-size:11px;color:var(--muted)}.reader-footer .quiet-button{min-height:40px;font-size:11px}.reader-footer svg{width:16px;height:16px}.reading-track{position:absolute;left:0;right:0;top:-1px;height:2px;background:var(--line)}#reading-progress-bar{height:100%;width:0;background:#6483af;transition:width .15s}.document-notice{background:#f6f0de;color:#706044;display:flex;align-items:center;gap:14px;padding:10px 22px;font-size:12px;line-height:1.6}.document-notice span{flex:1}.document-notice button{color:#6f592f;flex-shrink:0;min-height:30px}.panel-dialog,.help-dialog,.compact-dialog{color:var(--ink);border:1px solid var(--line);background:var(--surface);border-radius:13px;box-shadow:var(--shadow);padding:0;max-height:85vh;max-height:85dvh;overflow:auto}.panel-dialog{width:350px;margin:80px 22px auto auto}.panel-dialog::backdrop,.help-dialog::backdrop,.compact-dialog::backdrop{background:#1b2d4940;backdrop-filter:blur(2px)}.dialog-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:15px 20px;border-bottom:1px solid var(--line);background:var(--surface);position:sticky;top:0;z-index:2}.dialog-heading h2{font-size:17px;font-weight:550;margin:0}.dialog-heading .icon-button{height:36px;width:36px}.settings-body{padding:23px}.setting-group{margin-bottom:25px}.setting-label{display:flex;align-items:center;justify-content:space-between;font-size:13px;margin-bottom:14px}.setting-label output{font-size:12px;color:var(--muted)}.range-row{display:flex;align-items:center;gap:12px}.small-a{font:14px Georgia,serif;color:var(--muted)}.large-a{font:25px Georgia,serif;color:var(--muted)}input[type=range]{width:100%;accent-color:var(--accent);height:28px;cursor:pointer;margin:0}.theme-options{display:flex;gap:10px}.theme-choice{border:1px solid #d3d9e2;border-radius:7px;flex:1;min-height:48px;font-size:12px;position:relative}.theme-choice.paper{background:#f3f0e8;color:#273247}.theme-choice.white{background:#fff;color:#273247}.theme-choice.night{background:#17202d;color:#e6e9ee}.theme-choice[aria-pressed=true]{outline:2px solid #6e8bb7;outline-offset:2px}.segmented{display:flex;background:var(--bg);border:1px solid var(--line);padding:3px;border-radius:7px;gap:4px}.segmented button{flex:1;min-height:39px;font-size:13px;border-radius:4px;color:var(--muted)}.segmented button[aria-pressed=true]{background:var(--surface);color:var(--ink);box-shadow:0 1px 4px #1f345815}.serif-label{font-family:"Songti SC",STSong,"Noto Serif CJK SC",serif}.setting-hint{font-size:11px;line-height:1.8;color:var(--muted);margin:10px 0 0}.settings-body>.text-button{display:flex;margin:0 auto}.toc-dialog{width:370px;margin:80px auto auto 22px}#toc-list{padding:12px 14px 24px}#toc-list button{display:block;width:100%;text-align:left;line-height:1.8;padding:10px 12px;font-size:13px;border-radius:6px;color:var(--ink);overflow-wrap:anywhere}#toc-list button:hover{background:var(--accent-soft)}#toc-list button[data-level="2"]{padding-left:24px}#toc-list button[data-level="3"],#toc-list button[data-level="4"],#toc-list button[data-level="5"],#toc-list button[data-level="6"]{padding-left:36px;color:var(--muted);font-size:12px}.toc-empty{padding:24px;color:var(--muted);font-size:13px;line-height:1.8}.help-dialog{width:580px;max-width:calc(100vw - 28px)}.help-body{padding:24px 28px 30px;font-size:14px;line-height:1.9}.help-body h3{font-size:15px;margin:26px 0 8px;font-weight:600}.help-body>p:first-child{margin-top:0}.help-body .secondary-button{margin-top:12px}.compact-dialog{width:410px;max-width:calc(100vw - 32px);padding:28px}.compact-dialog h2{font-size:19px;font-weight:550;margin-bottom:14px}.compact-dialog p{font-size:14px;line-height:1.9;color:var(--muted);overflow-wrap:anywhere}.dialog-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:24px}.external-url{word-break:break-all}.toast{position:fixed;bottom:max(28px,env(safe-area-inset-bottom));left:50%;transform:translateX(-50%);background:#273247;color:white;padding:13px 20px;border-radius:8px;max-width:calc(100vw - 32px);width:max-content;box-shadow:0 8px 24px #20324b22;font-size:13px;line-height:1.7;z-index:100}.update-banner{display:flex;align-items:center;justify-content:center;gap:16px;background:#e2ecf9;color:#294e83;padding:10px 16px;font-size:12px}.update-banner button{color:#274f89;text-decoration:underline;min-height:28px}.noscript{padding:24px}.reader-view[data-theme=night]{--bg:#202b3a;--surface:#1c2735;--ink:#dce4ef;--muted:#a3afc0;--line:#344254;--reader:#17202d;--accent-soft:#2b3c55}.reader-view[data-theme=white]{--reader:#fff}
@media(min-width:1500px){.library-main{margin:0 auto}}@media(max-width:900px){.library-layout{grid-template-columns:190px minmax(0,1fr)}.library-sidebar{padding:30px 17px}.library-main{padding:42px 30px 24px}.library-footer{flex-direction:column;gap:4px}.book-actions .icon-button{width:34px}.book-open{gap:14px}}
@media(max-width:640px){.library-layout{display:block}.library-sidebar{height:auto;position:static;padding:18px 21px 0;background:var(--bg);border:0}.brand>span{font-size:21px}.brand small{display:none}.brand img{width:30px;height:30px;border-radius:7px}.sidebar-selection,.sidebar-bottom{display:none}.library-main{padding:32px 22px 20px;min-height:calc(100dvh - 48px)}.library-header h1{font-size:29px}.library-header .primary-button{font-size:12px;padding:10px 12px}.library-header .primary-button svg{width:17px;height:17px}.section-caption{font-size:11px;margin-bottom:9px}.library-subhead{padding:15px 0}.library-subhead p{font-size:12px}.mobile-help{display:inline-flex;padding:8px 0 8px 8px}.empty-state{min-height:430px;padding:36px 0 20px}.empty-state h2{font-size:21px}.empty-state>p{font-size:13px}.paper-illustration{width:105px;height:125px;margin-bottom:26px}.import-hint{font-size:10px!important}.library-footer{font-size:10px;gap:4px;padding-top:20px}.continue-section{padding:14px 16px;margin-top:22px}.continue-button strong{font-size:16px}.book-row{gap:4px;padding:18px 0;align-items:flex-start}.book-spine{width:32px;height:48px}.book-open{gap:12px}.book-info strong{font-size:14px}.book-info small{font-size:10px}.book-actions{flex-direction:column}.book-actions .icon-button{width:32px;height:30px;min-height:30px}.book-actions svg{width:16px;height:16px}.reader-toolbar{gap:4px;padding-left:8px;padding-right:8px}.reader-title{padding:0 6px}.reader-title strong{font-size:12px}.reader-title span{font-size:9px}.back-library span{display:none}.back-library{width:40px;padding:8px}.toolbar-actions{gap:0}.reader-footer{padding-right:18px;padding-left:8px}.reader-footer .quiet-button{font-size:10px}.panel-dialog,.toc-dialog{position:fixed;inset:auto 0 0;margin:0;width:100%;max-width:100%;max-height:82dvh;border-radius:18px 18px 0 0;border-bottom:0;padding-bottom:env(safe-area-inset-bottom)}.settings-body{padding:20px 26px}.setting-group{margin-bottom:20px}.width-setting{display:none}.help-dialog{max-height:88dvh}.help-body{padding:20px 23px;font-size:13px}.document-notice{padding:8px 14px;font-size:11px}.update-banner{font-size:11px;gap:8px}.update-banner>span{flex:1}.toast{bottom:max(60px,env(safe-area-inset-bottom));font-size:12px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

body[data-reading-theme="night"]{--bg:#202b3a;--surface:#1c2735;--ink:#dce4ef;--muted:#a3afc0;--line:#344254;--accent:#8caddd;--accent-soft:#2b3c55;color-scheme:dark}

.reader-view{color:var(--ink)}
body[data-reading-theme="night"]{color:var(--ink)}