:root{--ink:#17202a;--muted:#667085;--paper:#f6f2e9;--white:#fffdf8;--blue:#1749d2;--blue-deep:#0b276f;--gold:#d7a52d;--line:#17202a21;--shadow:0 24px 70px #121e3a24}*{box-sizing:border-box}html{scroll-behavior:smooth}body{color:var(--ink);background:var(--paper);-webkit-font-smoothing:antialiased;margin:0;font-family:Noto Sans SC,Microsoft YaHei,system-ui,sans-serif}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}.site-header{z-index:50;color:#fff;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#091944f5;border-bottom:1px solid #ffffff1f;height:76px;position:sticky;top:0}.header-inner{justify-content:space-between;align-items:center;max-width:1240px;height:100%;margin:auto;padding:0 32px;display:flex}.brand{align-items:center;gap:12px;display:flex}.brand-mark{color:#091944;background:var(--gold);border-radius:5px;place-items:center;width:40px;height:40px;font-family:Georgia,serif;font-size:24px;font-weight:800;display:grid;box-shadow:inset 0 0 0 1px #ffffff40}.brand strong{letter-spacing:.08em;font-size:16px;display:block}.brand small{color:#ffffff8c;letter-spacing:.23em;margin-top:3px;font-size:8px;display:block}.nav-links{align-items:center;gap:28px;font-size:14px;display:flex}.nav-links>a:not(.nav-cta),.text-button{color:#ffffffc7;transition:color .2s}.nav-links>a:hover,.text-button:hover{color:#fff}.nav-cta{color:#081944;background:var(--gold);border-radius:4px;padding:9px 20px;font-weight:700}.text-button{background:0 0;border:0}.header-account{align-items:center;gap:16px;display:flex}.header-balance{color:#f2cf70;background:#d7a52d1f;border:1px solid #d7a52d52;border-radius:3px;padding:6px 10px;font-size:12px;font-weight:700}.hero{color:#fff;background:radial-gradient(circle at 73% 35%,#2961eb57,#0000 30%),linear-gradient(118deg,#071739 0%,#0a235e 56%,#102f7f 100%);grid-template-columns:1.1fr .9fr;align-items:center;gap:64px;min-height:650px;padding:86px max(32px,50vw - 590px);display:grid;overflow:hidden}.eyebrow{color:var(--gold);letter-spacing:.23em;font-size:11px;font-weight:800}.hero h1{letter-spacing:-.035em;margin:20px 0 24px;font-family:Georgia,Songti SC,serif;font-size:clamp(52px,6vw,78px);font-weight:600;line-height:1.1}.hero h1 span{color:#f0c657}.hero-copy>p{color:#ffffffb8;max-width:650px;margin:0;font-size:17px;line-height:1.9}.hero-actions{gap:14px;margin-top:36px;display:flex}.button{border:1px solid #0000;border-radius:4px;justify-content:center;align-items:center;min-height:45px;padding:0 24px;font-weight:700;transition:transform .2s,box-shadow .2s,background .2s;display:inline-flex}.button:hover{transform:translateY(-2px)}.button:disabled{cursor:wait;opacity:.55;transform:none}.button.primary{color:#081944;background:var(--gold);box-shadow:0 10px 26px #d7a52d33}.button.secondary{color:#fff;background:var(--blue)}.button.ghost{color:#fff;background:#ffffff0d;border-color:#ffffff47}.button.ghost.dark{color:var(--ink);border-color:var(--line);background:0 0}.button.full{width:100%}.button.small{min-height:38px;padding:0 16px;font-size:13px}.hero-stats{border-top:1px solid #ffffff26;gap:36px;margin-top:46px;padding-top:28px;display:flex}.hero-stats span{color:#ffffff80;font-size:12px}.hero-stats strong{color:#fff;margin-bottom:6px;font-family:Georgia,serif;font-size:22px;display:block}.hero-visual{perspective:1000px;place-items:center;display:grid;position:relative}.book-shadow{filter:blur(22px);background:#00000052;border-radius:50%;width:330px;height:40px;position:absolute;bottom:-28px}.book-cover{aspect-ratio:.72;color:#fff;background:linear-gradient(90deg,#ffffff17,#0000 4% 96%,#00000038),radial-gradient(circle at 78% 20%,#286ee9 0,#0000 32%),linear-gradient(145deg,#061b4c,#0d3c9c 68%,#061739);border:1px solid #ffffff3b;border-radius:5px 11px 11px 5px;flex-direction:column;width:370px;padding:44px 38px;display:flex;position:relative;overflow:hidden;transform:rotateY(-9deg)rotate(1deg);box-shadow:-16px 22px 45px #00000059,inset 5px 0 12px #0000002e}.book-cover:after{content:"";pointer-events:none;border:1px solid #d7a52d59;position:absolute;inset:14px}.cover-orbit{border:1px solid #ffffff2e;border-radius:50%;width:280px;height:280px;position:absolute;top:-70px;right:-90px;box-shadow:0 0 0 32px #ffffff06,0 0 0 64px #ffffff05}.cover-kicker{z-index:1;color:#e9c257;letter-spacing:.19em;font-size:9px;position:relative}.book-cover strong{z-index:1;letter-spacing:.04em;margin-top:62px;font-family:Songti SC,Georgia,serif;font-size:35px;line-height:1.33;position:relative}.cover-line{background:var(--gold);width:42px;height:3px;margin:28px 0 18px}.book-cover em{color:#ffffffb8;letter-spacing:.06em;font-size:13px;font-style:normal}.book-cover small{z-index:1;color:#edcd76;letter-spacing:.15em;margin-top:auto;font-family:Georgia,serif;position:relative}.book-cover-compact{width:185px;min-width:185px;padding:24px 20px;transform:none;box-shadow:-7px 11px 25px #0003}.book-cover-compact .cover-kicker{font-size:5px}.book-cover-compact strong{margin-top:30px;font-size:18px}.book-cover-compact .cover-line{width:26px;height:2px;margin:16px 0 10px}.book-cover-compact em,.book-cover-compact small{font-size:7px}.shelf-section,.toc-section,.library-page{max-width:1180px;margin:auto;padding:80px 32px 100px}.section-heading{justify-content:space-between;align-items:end;gap:32px;margin-bottom:40px;display:flex}.section-heading h1,.section-heading h2{margin:10px 0 0;font-family:Georgia,Songti SC,serif;font-size:38px}.section-heading>p{max-width:460px;color:var(--muted);margin:0;line-height:1.7}.book-grid{grid-template-columns:repeat(2,1fr);gap:24px;display:grid}.book-card{background:var(--white);border:1px solid var(--line);gap:30px;padding:30px;display:flex;box-shadow:0 14px 40px #121e3a0f}.book-card-copy{flex-direction:column;display:flex}.book-category{color:var(--blue);letter-spacing:.08em;font-size:11px;font-weight:700}.book-card h3{margin:12px 0 4px;font-family:Georgia,Songti SC,serif;font-size:24px}.book-card .author{color:var(--gold);font-size:13px;font-weight:700}.book-card p:not(.author){color:var(--muted);font-size:13px;line-height:1.7}.book-card-footer{border-top:1px solid var(--line);justify-content:space-between;align-items:center;margin-top:auto;padding-top:18px;display:flex}.book-card-footer>strong{font-family:Georgia,serif;font-size:20px}.book-card-footer a{color:var(--blue);font-size:13px;font-weight:700}.book-detail-page{background:#f7f3eb}.book-detail-hero{background:linear-gradient(112deg,#071739 0 34%,#f7f3eb 34%);grid-template-columns:390px 1fr;align-items:center;gap:80px;min-height:620px;padding:80px max(32px,50vw - 540px);display:grid}.book-detail-copy h1{margin:16px 0 8px;font-family:Georgia,Songti SC,serif;font-size:50px}.detail-author{color:#8a6820;font-weight:700}.detail-description{max-width:760px;color:var(--muted);font-size:16px;line-height:1.85}.access-badge{color:#734e00;background:#fff2c6;border-radius:3px;margin:10px 0 18px;padding:8px 12px;font-size:12px;font-weight:700;display:inline-flex}.access-badge.active{color:#11623a;background:#dff7e8}.detail-actions{flex-wrap:wrap;gap:12px;display:flex}.demo-note{color:#8a8f98;font-size:11px}.toc-grid{grid-template-columns:repeat(2,1fr);gap:10px;display:grid}.toc-item{background:var(--white);border:1px solid var(--line);grid-template-columns:42px 1fr auto;align-items:center;gap:10px;min-height:65px;padding:0 18px;transition:border .2s,transform .2s;display:grid}.toc-item:hover{border-color:var(--gold);transform:translate(3px)}.toc-item>span{color:var(--gold);font-family:Georgia,serif}.toc-item strong{font-size:14px}.toc-item em{color:var(--blue);font-size:11px;font-style:normal}.toc-item.locked{opacity:.55}.toc-item.locked em{color:var(--muted)}.asset-section{border-top:1px solid var(--line);margin-top:72px;padding-top:48px}.asset-grid{grid-template-columns:repeat(3,1fr);gap:14px;display:grid}.asset-card{background:var(--white);border:1px solid var(--line);gap:8px;padding:22px;transition:border .2s,transform .2s;display:grid}.asset-card:hover{border-color:var(--gold);transform:translateY(-2px)}.asset-card span{color:var(--blue);letter-spacing:.12em;text-transform:uppercase;font-size:10px;font-weight:800}.asset-card strong{overflow-wrap:anywhere}.asset-card small{color:var(--muted)}.auth-page{background:radial-gradient(circle at 70% 20%,#1749d21a,transparent 26%),var(--paper);place-items:center;min-height:calc(100vh - 140px);padding:70px 20px;display:grid}.auth-card{background:var(--white);border:1px solid var(--line);width:min(460px,100%);box-shadow:var(--shadow);padding:48px}.auth-card h1{margin:12px 0;font-family:Georgia,Songti SC,serif;font-size:34px}.auth-card>p{color:var(--muted);margin-bottom:28px}.auth-card form{gap:18px;display:grid}.auth-card label{gap:8px;font-size:13px;font-weight:700;display:grid}.auth-card input,.chapter-search{width:100%;height:46px;color:var(--ink);background:#fff;border:1px solid #ccd0d8;border-radius:3px;outline:none;padding:0 13px}.auth-card input:focus,.chapter-search:focus{border-color:var(--blue);box-shadow:0 0 0 3px #1749d21a}.auth-tabs{background:#edf0f6;border-radius:4px;grid-template-columns:1fr 1fr;gap:4px;margin-bottom:22px;padding:4px;display:grid}.auth-tabs button{height:38px;color:var(--muted);background:0 0;border:0;border-radius:3px;font-weight:700}.auth-tabs button.active{color:#fff;background:var(--blue-deep);box-shadow:0 3px 12px #0b276f2e}.auth-switch{color:var(--muted);text-align:center;margin-top:24px;font-size:13px}.auth-switch a{color:var(--blue);font-weight:700}.notice{border-radius:3px;margin:16px 0;padding:13px 15px;font-size:13px}.notice.error{color:#8c2424;background:#fff0ee;border:1px solid #efc3bd}.notice a{margin-left:8px;text-decoration:underline}.loading-page,.reader-error{min-height:calc(100vh - 140px);color:var(--muted);flex-direction:column;justify-content:center;align-items:center;gap:20px;display:flex}.library-section{margin-top:44px}.library-section h2{font-family:Georgia,Songti SC,serif}.record-list{gap:12px;display:grid}.record-card{background:var(--white);border:1px solid var(--line);justify-content:space-between;align-items:center;gap:20px;padding:24px;display:flex}.record-card h3{margin:10px 0 5px}.record-card p{color:var(--muted);margin:0;font-size:12px}.record-actions{gap:10px;display:flex}.status{color:#64501b;background:#f9e9b8;border-radius:2px;padding:4px 8px;font-size:10px;font-weight:800;display:inline-block}.status.paid{color:#145b37;background:#dff7e8}.status.returned,.status.expired{color:#59606b;background:#eceef1}.empty-state{text-align:center;background:var(--white);border:1px dashed #c6c7c9;padding:70px}.empty-state h2{font-family:Georgia,Songti SC,serif;font-size:28px}.empty-state p{color:var(--muted)}.admin-login-page{background:linear-gradient(135deg,#061638,#0b2c78);place-items:center;min-height:calc(100vh - 140px);padding:70px 20px;display:grid}.admin-login-card{background:var(--white);border-top:4px solid var(--gold);width:min(480px,100%);padding:50px;box-shadow:0 30px 90px #00000052}.admin-login-card h1{margin:12px 0;font-family:Georgia,Songti SC,serif;font-size:38px}.admin-login-card>p{color:var(--muted);margin-bottom:28px;line-height:1.7}.admin-login-card form,.admin-create-panel form{gap:16px;display:grid}.admin-login-card label,.admin-create-panel label{gap:8px;font-size:13px;font-weight:700;display:grid}.admin-login-card input,.admin-create-panel input{background:#fff;border:1px solid #ccd0d8;border-radius:3px;outline:none;width:100%;height:46px;padding:0 13px}.admin-login-card input:focus,.admin-create-panel input:focus{border-color:var(--blue);box-shadow:0 0 0 3px #1749d21a}.admin-page{max-width:1180px;min-height:calc(100vh - 140px);margin:auto;padding:70px 32px 110px}.admin-heading{justify-content:space-between;align-items:flex-start;gap:32px;margin-bottom:34px;display:flex}.admin-heading h1{margin:10px 0;font-family:Georgia,Songti SC,serif;font-size:44px}.admin-heading p,.admin-create-panel p{color:var(--muted);margin:0;line-height:1.7}.admin-create-panel{background:var(--white);border:1px solid var(--line);grid-template-columns:1fr minmax(360px,.8fr);align-items:end;gap:42px;padding:30px;display:grid;box-shadow:0 14px 40px #121e3a0f}.admin-create-panel h2{margin:0 0 8px;font-family:Georgia,Songti SC,serif}.admin-create-panel form{grid-template-columns:1fr auto;align-items:end}.generated-key-card{color:#fff;border-left:4px solid var(--gold);background:#0a265f;grid-template-columns:1fr auto;align-items:center;gap:14px 24px;margin-top:20px;padding:26px 30px;display:grid;box-shadow:0 16px 40px #0a265f2e}.generated-key-card span{color:#efce75;margin-bottom:10px;font-size:12px;font-weight:700;display:block}.generated-key-card code{overflow-wrap:anywhere;font-family:Cascadia Code,Consolas,monospace;font-size:16px;display:block}.generated-key-card small{color:#ffffff94;grid-column:1/-1}.admin-key-section{margin-top:62px}.admin-key-list{gap:12px;display:grid}.admin-key-card{background:var(--white);border:1px solid var(--line);grid-template-columns:minmax(220px,.8fr) 1.5fr auto;align-items:center;gap:28px;padding:24px 26px;display:grid}.admin-key-main h3{margin:9px 0 7px}.admin-key-main code{color:var(--blue);font-family:Cascadia Code,Consolas,monospace;font-size:12px}.admin-key-card dl{grid-template-columns:repeat(3,1fr);gap:14px;margin:0;display:grid}.admin-key-card dl div{min-width:0}.admin-key-card dt{color:var(--muted);margin-bottom:5px;font-size:10px}.admin-key-card dd{overflow-wrap:anywhere;margin:0;font-size:12px}.reader-shell{background:#fbfaf6;grid-template-columns:320px 1fr;min-height:calc(100vh - 76px);display:grid}.reader-sidebar{color:#fff;background:#0a1d4d;height:calc(100vh - 76px);padding:32px 24px;position:sticky;top:76px;overflow-y:auto}.reader-back{color:#e7c563;font-size:12px}.reader-sidebar h2{margin:24px 0 16px;font-family:Georgia,Songti SC,serif;font-size:21px;line-height:1.45}.reader-progress{background:#ffffff24;height:3px}.reader-progress span{background:var(--gold);height:100%;display:block}.reader-sidebar>p{color:#ffffff7a;font-size:11px}.chapter-search{color:#fff;background:#ffffff14;border-color:#ffffff24;height:38px;margin:10px 0 18px}.chapter-search::placeholder{color:#ffffff6e}.chapter-nav{gap:2px;display:grid}.chapter-nav a{color:#ffffff9e;border-left:2px solid #0000;grid-template-columns:30px 1fr;gap:8px;padding:9px 8px;font-size:12px;line-height:1.4;display:grid}.chapter-nav a:hover{color:#fff;background:#ffffff0f}.chapter-nav a.current{color:#fff;border-left-color:var(--gold);background:#d7a52d21}.chapter-nav a span{color:#d9b85d;font-family:Georgia,serif}.chapter-nav a.locked{opacity:.35}.reader-main{width:min(900px,100vw - 320px);margin:0 auto;padding:62px 70px 100px;position:relative}.reader-toolbar{z-index:4;float:right;border:1px solid var(--line);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffffe6;align-items:center;gap:5px;margin-right:-50px;padding:5px;display:flex;position:sticky;top:90px;box-shadow:0 8px 24px #00000014}.reader-toolbar span{color:var(--muted);padding:0 8px;font-size:10px}.reader-toolbar button{white-space:nowrap;background:#eef1f7;border:0;width:42px;height:32px}.markdown-body{clear:both;color:#252c35;font-family:Georgia,Noto Serif SC,Songti SC,serif;line-height:2}.markdown-body>h1:first-child{color:#0b276f;margin-top:0;padding-top:20px;font-size:2.45em;line-height:1.3}.markdown-body h1{color:#0b276f;margin:2.2em 0 .7em;font-size:1.75em;line-height:1.35}.markdown-body h2{color:#163d93;margin-top:2.1em;font-size:1.55em}.markdown-body h3{color:#183b78;margin:2em 0 .65em;font-size:1.25em}.markdown-body p{margin:1em 0}.markdown-body a{color:var(--blue);text-underline-offset:3px;text-decoration:underline}.markdown-body blockquote{color:#5f6570;border-left:4px solid var(--gold);background:#f1eee5;margin:1.6em 0;padding:8px 22px}.markdown-body pre{color:#d9e2ff;background:#091736;border-radius:5px;margin:1.5em 0;padding:22px;line-height:1.65;overflow-x:auto}.markdown-body code{color:#a63d36;background:#f1ece3;border-radius:3px;padding:.14em .35em;font-family:Cascadia Code,Consolas,monospace;font-size:.84em}.markdown-body pre code{color:inherit;background:0 0;padding:0}.markdown-body table{border-collapse:collapse;width:100%;margin:1.5em 0;font-family:Noto Sans SC,sans-serif;font-size:.85em}.markdown-body th,.markdown-body td{text-align:left;border:1px solid #d7d3c9;padding:10px 12px}.markdown-body th{background:#efebe1}.markdown-body img{max-width:100%}.reader-pagination{border-top:1px solid var(--line);grid-template-columns:1fr auto 1fr;align-items:center;gap:20px;margin-top:70px;padding-top:26px;display:grid}.reader-pagination a{color:var(--blue);font-weight:700}.reader-pagination>:last-child{text-align:right}.reader-pagination span{color:var(--muted);font-size:13px}.sidebar-toggle{display:none}.site-footer{color:#ffffff8c;text-align:center;letter-spacing:.13em;background:#071739;padding:28px;font-size:11px}@media (max-width:900px){.site-header{height:66px}.header-inner{padding:0 18px}.nav-links{gap:14px}.nav-links>a:first-child{display:none}.hero{text-align:center;grid-template-columns:1fr;padding:70px 24px}.hero-copy>p{margin:auto}.hero-actions,.hero-stats{justify-content:center}.hero-visual{margin-top:30px}.book-cover{width:min(330px,80vw)}.book-grid,.toc-grid,.asset-grid{grid-template-columns:1fr}.book-detail-hero{background:linear-gradient(#071739 0 34%,#f7f3eb 34%);grid-template-columns:1fr;gap:45px;padding:60px 24px}.book-detail-hero>.book-cover{justify-self:center}.reader-shell{display:block}.reader-sidebar{z-index:30;width:min(340px,88vw);height:calc(100vh - 66px);transition:transform .25s;position:fixed;top:66px;left:0;transform:translate(-105%);box-shadow:15px 0 40px #00000040}.reader-sidebar.open{transform:translate(0)}.sidebar-toggle{z-index:40;color:#fff;background:#0a1d4d;border:1px solid #fff3;border-radius:4px;padding:12px 18px;display:block;position:fixed;bottom:18px;left:12px;box-shadow:0 10px 30px #00000040}.reader-main{width:100%;padding:45px 24px 80px}.reader-toolbar{margin-right:0;top:78px}.admin-create-panel,.admin-key-card{grid-template-columns:1fr}.admin-key-card dl{grid-template-columns:repeat(3,1fr)}}@media (max-width:620px){.brand small,.nav-links>a:nth-child(2){display:none}.hero h1{font-size:46px}.hero-stats{gap:18px}.hero-stats strong{font-size:18px}.section-heading{display:block}.section-heading>p{margin-top:12px}.book-card{flex-direction:column}.book-cover-compact{align-self:center;width:150px}.book-detail-copy h1{font-size:38px}.detail-actions{display:grid}.toc-item{grid-template-columns:35px 1fr}.toc-item em{display:none}.auth-card{padding:32px 24px}.header-balance{display:none}.admin-page{padding:48px 20px 80px}.admin-heading{display:grid}.admin-heading h1{font-size:36px}.admin-login-card{padding:36px 24px}.admin-create-panel{padding:24px}.admin-create-panel form{grid-template-columns:1fr}.generated-key-card{grid-template-columns:1fr;padding:24px}.generated-key-card small{grid-column:auto}.admin-key-card dl{grid-template-columns:1fr}.record-card{flex-direction:column;align-items:flex-start}.markdown-body>h1:first-child{font-size:1.9em}}