:root{--navy:#003b78;--navy-dark:#002d62;--link:#064fd1;--orange:#fa4b0b;--green:#079323;--text:#15181d;--muted:#5c6169;--line:#cfd4da;--soft:#f5f8fc;--focus:#ff9b35;--panel-radius:5px;--container:1280px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--text);background:#fff;font-family:"Noto Sans CJK SC","Microsoft YaHei","PingFang SC",Arial,sans-serif;font-size:16px;line-height:1.55;letter-spacing:0}
a{color:var(--link);text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease}
a:hover{text-decoration:underline;color:#003991}
button,input{font:inherit;letter-spacing:0}
button,a{touch-action:manipulation}
button{cursor:pointer}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.container{width:min(calc(100% - 32px),var(--container));margin-inline:auto}
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:fixed;top:8px;left:8px;z-index:50;padding:10px 14px;background:#fff;border:2px solid var(--navy);transform:translateY(-150%)}
.skip-link:focus{transform:translateY(0)}
.site-header{background:#fff}
.header-inner{height:76px;display:flex;align-items:center;gap:36px}
.brand{display:flex;flex-direction:column;flex:0 0 330px;color:var(--navy-dark);line-height:1.1}
.brand:hover{text-decoration:none}
.brand strong{font-family:STKaiti,"KaiTi",serif;font-size:42px;font-weight:800}
.brand span{font-size:14px;color:#555;margin-left:4px;margin-top:2px}
.header-search{margin-left:auto;display:grid;grid-template-columns:minmax(280px,510px) 84px;gap:14px;flex:1;justify-content:end}
.header-search input,.mobile-home-search input{height:44px;border:1px solid #999;border-radius:3px;padding:0 14px;color:var(--text);min-width:0}
.header-search button,.mobile-home-search button{height:44px;border:0;border-radius:3px;background:var(--orange);color:#fff;font-weight:700}
.header-search button:hover,.mobile-home-search button:hover{background:#d83d07}
.mobile-search-link,.menu-button{display:none}
.main-nav{background:linear-gradient(90deg,var(--navy-dark),#004990,var(--navy-dark));border-bottom:1px solid #2d6ca9}
.nav-primary{height:42px;display:flex;align-items:stretch}
.nav-primary a{color:#fff;flex:0 0 150px;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700}
.nav-primary a:hover{background:#0759a9;text-decoration:none}
.nav-more{display:none}
.promo{min-height:43px;margin-top:8px;border:1px solid #b9d3f5;background:#f5f9ff;color:#084cc4;display:flex;align-items:center;justify-content:center;gap:14px;font-size:17px;font-weight:700;letter-spacing:1px}
.promo svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.page-shell{padding-top:8px;padding-bottom:16px}
.mobile-home-search{display:none}
.category-strip{height:43px;border:1px solid var(--line);border-radius:var(--panel-radius);display:flex;align-items:center;margin-bottom:5px;overflow:hidden}
.category-strip a{flex:1;text-align:center;font-weight:700;border-right:1px solid #ddd;min-width:80px}
.category-strip a:last-child{border-right:0}
.panel{border:1px solid var(--line);border-radius:var(--panel-radius);background:#fff}
.panel-heading{min-height:40px;display:flex;align-items:center;justify-content:space-between;padding:0 14px;border-bottom:1px solid var(--line)}
.panel-heading h1,.panel-heading h2{font-size:21px;margin:0;color:#17191d}
.panel-heading>a{font-size:16px}
.home-grid{display:grid;grid-template-columns:minmax(0,1fr) 365px;gap:12px}
.recommendations{overflow:hidden}
.book-card{display:grid;grid-template-columns:100px minmax(0,1fr) 120px;gap:14px;padding:9px 14px;border-bottom:1px solid #d8dce1;min-height:116px}
.book-card:last-child{border-bottom:0}
.book-cover{display:block;width:100px;height:96px;overflow:hidden;background:#e7edf5;border-radius:3px;align-self:start}
.book-cover img{display:block;width:100%;height:100%;object-fit:cover}
.book-card-body{min-width:0}
.book-card h3{font-size:17px;line-height:1.3;margin:1px 0 3px}
.book-author,.book-summary{margin:0;font-size:14px}
.book-summary{color:#474b52;margin-top:2px;display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden}
.book-actions{display:flex;flex-direction:column;align-items:flex-end;justify-content:center;gap:8px;font-size:16px}
.status{color:var(--green);white-space:nowrap}
.status.completed{color:#078e1d}
.home-sidebar{display:flex;flex-direction:column;gap:10px}
.compact-list ol,.update-list ul{list-style:none;margin:0;padding:5px 14px 7px}
.compact-list li{display:grid;grid-template-columns:25px minmax(0,1fr) 86px;align-items:center;min-height:28px;border-bottom:1px dashed #d8dce1;font-size:14px;counter-increment:item}
.compact-list ol{counter-reset:item}
.compact-list li::before{content:counter(item);color:#222}
.compact-list li:nth-child(-n+3)::before{color:#e81818}
.compact-list li span{text-align:right;color:#494d53;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.update-list li{display:grid;grid-template-columns:50px minmax(0,1fr) minmax(100px,1.1fr);gap:6px;align-items:center;min-height:27px;border-bottom:1px dashed #d8dce1;font-size:13px}
.update-list li>*{overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.update-list time{color:#444}
.completed-list{margin-top:10px}
.completed-table>div{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;padding:4px 14px;border-bottom:1px solid #dde1e6;font-size:14px}
.completed-table>div:last-child{border-bottom:0}
.completed-table>div>*:last-child{text-align:center}
.empty-state{text-align:center;padding:72px 24px;border:1px solid var(--line);border-radius:var(--panel-radius);background:var(--soft)}
.empty-state h2{font-size:24px;margin:0 0 8px}.empty-state p{color:var(--muted);margin:0}
.breadcrumbs{min-height:40px;display:flex;align-items:center;gap:10px;padding:0 12px;border:1px solid var(--line);border-radius:var(--panel-radius);margin-bottom:8px;overflow:hidden;white-space:nowrap}
.breadcrumbs>*{overflow:hidden;text-overflow:ellipsis}
.list-page .list-description{margin:0;padding:12px 16px;border-bottom:1px solid var(--line);color:var(--muted)}
.list-page .book-card{grid-template-columns:105px minmax(0,1fr) 140px;min-height:130px}
.list-page .book-cover{height:112px}
.pager{display:flex;align-items:center;justify-content:center;gap:12px;margin:16px auto}
.pager a,.pager span,.pager strong{min-height:44px;min-width:86px;padding:9px 14px;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;border-radius:3px}
.pager span{color:#999}.pager strong{border:0;font-weight:500}
.detail-layout{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:12px}
.detail-main,.detail-sidebar{display:flex;flex-direction:column;gap:10px;min-width:0}
.book-hero{display:grid;grid-template-columns:230px minmax(0,1fr);gap:28px;padding:20px}
.detail-cover{width:230px;height:307px;object-fit:cover;border-radius:4px;background:#e6ebf2}
.book-facts h1{font-family:STKaiti,"KaiTi",serif;font-size:34px;line-height:1.25;margin:0 0 10px;color:#080b0e}
.book-facts dl,.book-info dl{margin:0}
.book-facts dl>div,.book-info dl>div{display:grid;grid-template-columns:90px minmax(0,1fr);margin:3px 0}
.book-facts dt,.book-info dt{font-weight:400}.book-facts dd,.book-info dd{margin:0;min-width:0}
.hero-actions{display:grid;grid-template-columns:160px 160px;gap:24px;margin-top:20px}
.button{min-height:46px;border:1px solid var(--link);border-radius:4px;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:18px;padding:8px 18px}
.button:hover{text-decoration:none}
.button.primary{background:var(--orange);border-color:var(--orange);color:#fff}.button.primary:hover{background:#d83d07}
.button.secondary{background:#fff;color:var(--link)}.button.secondary:hover{background:#f1f6ff}
.summary-panel{padding:10px 14px}.summary-panel h2,.downloads h2,.book-info h2,.related h2{font-size:21px;margin:0 0 5px}
.summary-copy p{margin:0;line-height:1.85;text-indent:2em}.summary-toggle{display:none}
.text-button{border:0;background:transparent;color:var(--link);min-height:44px;padding:6px 0}
.chapter-preview ol{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));margin:0;padding:5px 14px 8px;list-style-position:inside}
.chapter-preview li{padding:4px 6px;border-bottom:1px dashed #d7dbe0;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.muted{color:var(--muted);padding:12px 14px;margin:0}
.downloads{padding:8px 10px}.download-note{text-align:center;background:#fff9e8;border:1px solid #e9bf41;margin:0 0 5px;padding:5px;color:#695018}
.download-list{border:1px solid var(--line)}
.download-list>div{display:grid;grid-template-columns:2fr 1fr 180px;align-items:center;gap:10px;min-height:38px;border-bottom:1px solid var(--line);padding:3px 10px}.download-list>div:last-child{border-bottom:0}
.download-list strong{color:var(--link);font-weight:500}.download-button{background:var(--orange);color:#fff;text-align:center;border-radius:3px;padding:4px 10px}.download-button:hover{background:#d83d07;color:#fff;text-decoration:none}
.download-meta{display:flex;justify-content:space-between;margin:6px 2px 0;color:#444}
.detail-sidebar .panel{padding:10px 14px}.book-info dl>div{grid-template-columns:70px minmax(0,1fr)}
.related ul{margin:0;padding:0 0 0 20px}.related li{margin:6px 0}
.directory-page .panel-heading h1{font-size:22px}.directory-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));margin:0;padding:10px 16px;list-style:none;gap:0 18px}
.directory-grid li{min-width:0;border-bottom:1px dashed #d8dce1;padding:9px 0;display:flex;justify-content:space-between;gap:10px}.directory-grid li a{overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.directory-grid time{color:var(--muted);font-size:13px;white-space:nowrap}
.reader{--reader-bg:#fff;--reader-text:#242424;--reader-font:19px;--reader-line:1.95;--reader-width:900px;max-width:var(--reader-width);margin:0 auto;padding:0 26px 40px;background:var(--reader-bg);color:var(--reader-text);transition:background-color .2s ease,color .2s ease}
.reader[data-theme="green"]{--reader-bg:#eef5e9;--reader-text:#1c291d}.reader[data-theme="dark"]{--reader-bg:#1f2429;--reader-text:#d7d9dc;--line:#4b5258;--link:#8db9ff}
.reader[data-width="wide"]{--reader-width:1120px}.reader[data-line="compact"]{--reader-line:1.65}
.reader-breadcrumbs{border-left:0;border-right:0;border-top:0;border-radius:0;background:transparent}
.reader-header{text-align:center;padding:25px 0 15px}.reader-header h1{font-size:30px;margin:0 0 8px}.reader-header p{margin:0;color:var(--muted)}
.reader-tools{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:8px 18px;border:1px solid var(--line);padding:8px;background:rgba(255,255,255,.5)}
.reader-tools>div{display:flex;align-items:center;gap:5px}.reader-tools span{font-size:14px;color:var(--muted)}
.reader-tools button{min-width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:3px;color:#222}
.swatch{display:block;width:20px;height:20px;border:1px solid #888;border-radius:50%}.swatch.light{background:#fff}.swatch.green{background:#eef5e9}.swatch.dark{background:#1f2429}
.chapter-nav{display:grid;grid-template-columns:repeat(3,1fr);margin:16px 0;border:1px solid var(--line);border-radius:4px;overflow:hidden}.chapter-nav>*{min-height:46px;display:flex;align-items:center;justify-content:center;border-right:1px solid var(--line)}.chapter-nav>*:last-child{border-right:0}.chapter-nav span{color:#999}
.chapter-content{font-family:"Noto Serif CJK SC","Songti SC","SimSun",serif;font-size:var(--reader-font);line-height:var(--reader-line)}
.chapter-content p{margin:0 0 1.15em;text-indent:2em;overflow-wrap:anywhere}
.error-page{text-align:center;padding:100px 20px}.error-page>strong{display:block;font-size:72px;color:var(--navy)}.error-page h1{font-size:28px;margin:0}.error-page p{color:var(--muted);margin:10px 0 24px}.error-page .button{max-width:180px;margin:auto}
.site-footer{border-top:1px solid #d9dde2;text-align:center;padding:17px 16px 13px;color:#575b61}.site-footer nav{display:flex;justify-content:center;gap:14px}.site-footer p{font-size:13px;margin:7px 0 0}

@media(max-width:1023px){
  :root{--container:960px}.header-inner{gap:18px}.brand{flex-basis:290px}.brand strong{font-size:37px}.header-search{grid-template-columns:minmax(220px,1fr) 74px}.nav-primary a{flex:1}.home-grid{grid-template-columns:minmax(0,1fr) 320px}.book-card{grid-template-columns:88px minmax(0,1fr) 104px;padding-inline:10px}.book-cover{width:88px}.detail-layout{grid-template-columns:minmax(0,1fr) 290px}.book-hero{grid-template-columns:190px minmax(0,1fr);gap:20px}.detail-cover{width:190px;height:254px}.hero-actions{grid-template-columns:140px 140px;gap:14px}
}
@media(min-width:768px) and (max-width:900px){
  .detail-layout{display:flex;flex-direction:column}.detail-main,.detail-sidebar{display:contents}.book-hero{grid-template-columns:220px minmax(0,1fr)}.detail-cover{width:220px;height:294px}.book-info{order:4}.related{order:5}.directory-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:767px){
  body{font-size:16px;line-height:1.6}.container{width:calc(100% - 30px)}
  .header-inner{height:94px;gap:10px}.brand{flex:1 1 auto;min-width:0}.brand strong{font-size:32px;white-space:nowrap}.brand span{font-size:13px;white-space:nowrap}
  .header-search{display:none}.mobile-search-link{display:flex;align-items:center;gap:5px;min-height:48px;padding:0 12px;border:1px solid var(--orange);border-radius:8px;color:var(--orange);font-size:18px;font-weight:700}.mobile-search-link:hover{text-decoration:none;background:#fff4ef}.mobile-search-link svg{width:25px;height:25px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round}
  .menu-button{display:flex;align-items:center;justify-content:center;width:48px;height:48px;border:0;background:transparent;color:var(--navy)}.menu-button svg{width:36px;height:36px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round}
  .nav-primary{width:100%;height:60px}.nav-primary a{font-size:18px;flex:0 0 25%}.nav-primary a:nth-child(5){display:none}.nav-more{width:100%;padding:8px 15px;background:#fff;border-bottom:1px solid var(--line)}.nav-more:not([hidden]){display:flex;gap:10px}.nav-more a{flex:1;min-height:44px;border:1px solid var(--line);display:flex;align-items:center;justify-content:center}
  .promo{width:calc(100% - 30px);min-height:88px;margin-top:12px;padding:8px 14px;display:grid;grid-template-columns:22px 1fr;text-align:center;gap:1px 8px;font-size:17px}.promo svg{grid-row:1}.promo span:first-of-type{grid-column:2}.promo b{display:none}.promo span:nth-of-type(2){grid-column:1/3}.promo span:nth-of-type(3){grid-column:1/3}
  .page-shell{padding-top:15px}.mobile-home-search{display:grid;grid-template-columns:minmax(0,1fr) 116px;gap:10px;margin-bottom:12px}.mobile-home-search input,.mobile-home-search button{height:60px;font-size:18px}
  .category-strip{height:auto;display:grid;grid-template-columns:repeat(4,1fr);padding:10px 0;margin-bottom:14px}.category-strip a{min-width:0;min-height:34px;display:flex;align-items:center;justify-content:center;border-right:1px solid #ddd;font-size:16px}.category-strip a:nth-child(4n){border-right:0}
  .home-grid{display:flex;flex-direction:column;gap:12px}.panel-heading{min-height:46px;padding-inline:14px}.panel-heading h1,.panel-heading h2{font-size:21px}
  .book-card,.list-page .book-card{grid-template-columns:116px minmax(0,1fr) 96px;gap:12px;padding:10px 14px;min-height:157px}.book-cover,.list-page .book-cover{width:116px;height:143px}.book-card h3{font-size:18px}.book-author,.book-summary{font-size:15px}.book-summary{-webkit-line-clamp:3}.book-actions{font-size:16px;gap:7px}
  .recommendations .book-card:nth-of-type(n+6){display:none}.home-sidebar{display:contents}.compact-list{order:2}.update-list{order:3}.completed-list{margin-top:12px}.compact-list li{min-height:35px;font-size:15px;grid-template-columns:30px minmax(0,1fr) 90px}.update-list li{min-height:36px;font-size:14px;grid-template-columns:58px minmax(0,1fr) minmax(115px,1.1fr)}.compact-list li:nth-child(n+6),.update-list li:nth-child(n+6){display:none}
  .completed-table>div{grid-template-columns:minmax(0,1.5fr) minmax(70px,.8fr) 70px 78px;gap:8px;min-height:38px;align-items:center;padding-inline:12px;font-size:14px}.completed-table>div:nth-child(n+6){display:none}
  .breadcrumbs{min-height:46px;margin-bottom:12px;padding-inline:12px}.detail-layout{display:flex;flex-direction:column}.detail-main,.detail-sidebar{display:contents}
  .book-hero{display:grid;grid-template-columns:40% minmax(0,1fr);gap:18px;padding:16px}.detail-cover{width:100%;height:auto;aspect-ratio:3/4;object-fit:cover}.book-facts h1{font-size:30px}.book-facts dl>div{grid-template-columns:80px minmax(0,1fr);margin:2px 0}.hero-actions{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:4px 0 0}.button{min-height:52px;font-size:18px}
  .summary-panel{padding:12px 16px}.summary-panel h2,.downloads h2,.book-info h2,.related h2{font-size:21px}.summary-copy.collapsed{max-height:140px;overflow:hidden;position:relative}.summary-copy.collapsed::after{content:"";position:absolute;left:0;right:0;bottom:0;height:45px;background:linear-gradient(transparent,#fff)}.summary-toggle{display:block;margin-left:auto}
  .chapter-preview ol{grid-template-columns:1fr;padding-inline:14px}.chapter-preview li{min-height:43px;display:flex;align-items:center}.downloads{padding:12px 14px}.download-note{font-size:14px}.download-list>div{grid-template-columns:minmax(0,1.2fr) 78px;min-height:60px;padding:6px 10px}.download-button{grid-column:1/-1;min-height:44px;display:flex;align-items:center;justify-content:center}.download-meta{font-size:13px;gap:10px}.detail-sidebar .panel{padding:12px 16px}.book-info{order:4}.related{order:5}
  .directory-grid{grid-template-columns:1fr;padding-inline:14px}.directory-grid li{min-height:48px;align-items:center}.directory-page .panel-heading{align-items:flex-start;gap:8px;padding-top:9px;padding-bottom:9px}.directory-page .panel-heading h1{font-size:19px}
  .reader{width:100%;padding:0 17px 32px}.reader-header{padding:20px 0 12px}.reader-header h1{font-size:26px}.reader-tools{justify-content:flex-start;gap:8px 12px}.reader-tools>div{flex:1 1 auto}.chapter-content{font-size:18px;line-height:1.9}.chapter-nav>*{min-height:50px}.reader-breadcrumbs{font-size:14px;padding-inline:0}
  .error-page{padding:70px 20px}.site-footer nav{gap:8px;flex-wrap:wrap}.site-footer p{font-size:12px}
}
@media(max-width:480px){
  .container{width:calc(100% - 20px)}.header-inner{width:calc(100% - 20px)}.brand strong{font-size:27px}.brand span{font-size:11px}.mobile-search-link{padding:0 8px}.mobile-search-link span{display:none}.nav-primary a{font-size:16px}.promo{width:calc(100% - 20px);font-size:16px}.page-shell{width:calc(100% - 20px)}
  .mobile-home-search{grid-template-columns:minmax(0,1fr) 94px}.book-card,.list-page .book-card{grid-template-columns:86px minmax(0,1fr) 78px;gap:9px;padding:9px}.book-cover,.list-page .book-cover{width:86px;height:122px}.book-card h3{font-size:17px}.book-author,.book-summary{font-size:14px}.book-summary{-webkit-line-clamp:3}.book-actions{font-size:14px}.completed-table>div{grid-template-columns:minmax(0,1fr) 70px 68px}.completed-table>div>*:nth-child(2){display:none}.update-list li{grid-template-columns:50px minmax(0,1fr)}.update-list li span{display:none}
  .book-hero{grid-template-columns:116px minmax(0,1fr);gap:13px;padding:12px}.book-facts h1{font-size:25px}.book-facts dl>div{grid-template-columns:66px minmax(0,1fr);font-size:14px}.hero-actions{gap:10px}.button{font-size:17px}.download-meta{flex-direction:column;gap:0}.reader-tools span{display:none}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}