:root{--ink:#172033;--muted:#687188;--line:#e5e8ef;--paper:#fff;--accent:#e6342a;--soft:#f5f7fa;--radius:18px;--shadow:0 18px 50px rgba(25,35,55,.08)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:var(--soft);font:16px/1.75 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
a{color:inherit;text-decoration:none}
a:hover{color:var(--accent)}
.shell{width:min(1180px,calc(100% - 36px));margin-inline:auto}
.topbar{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.94);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
.topbar-inner{height:70px;display:flex;align-items:center;justify-content:space-between}
.brand{font-size:22px;font-weight:900;letter-spacing:-1px}
.topbar nav,.modern-header nav{display:flex;gap:28px;font-size:14px;font-weight:700}
.hero{margin:34px 0;min-height:260px;border-radius:26px;padding:48px;display:flex;justify-content:space-between;align-items:flex-end;overflow:hidden}
.hero-one{color:#fff;background:radial-gradient(circle at 78% 20%,#ed796d 0,transparent 31%),linear-gradient(135deg,#131c31,#2e405f)}
.eyebrow,.kicker{margin:0 0 12px;color:var(--accent);font-size:12px;font-weight:900;letter-spacing:2px;text-transform:uppercase}
.hero h1{max-width:650px;margin:0 0 12px;font-size:clamp(38px,6vw,70px);line-height:1.08;letter-spacing:-3px}
.hero p{max-width:620px;margin:0;color:rgba(255,255,255,.72)}
.hero-stat{display:grid;place-items:center;width:140px;height:140px;border:1px solid rgba(255,255,255,.24);border-radius:50%;background:rgba(255,255,255,.08)}
.hero-stat strong{font-size:25px;line-height:1}.hero-stat span{font-size:13px;color:rgba(255,255,255,.7)}
.layout-main,.article-layout,.paper-columns,.paper-article-layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:28px;align-items:start}
.content-panel,.article-card,.side-card,.paper-feed,.paper-aside>.footprint-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.content-panel,.article-card,.paper-feed{padding:30px}
.section-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:18px}
.section-heading h2{margin:0;font-size:19px;letter-spacing:-.5px}.section-heading span{color:var(--muted);font-size:12px}
.news-row{display:grid;grid-template-columns:62px 1fr;gap:20px;padding:24px 0;border-top:1px solid var(--line)}
.news-row:first-child{border-top:0}
.news-date{display:flex;flex-direction:column;align-items:center;padding:9px 5px;border-radius:12px;background:var(--soft)}
.news-date strong{font-size:22px;line-height:1.2}.news-date span,.meta{color:var(--muted);font-size:12px}
.news-row h3,.paper-item h2{margin:4px 0 7px;font-size:21px;line-height:1.45}.news-row p,.paper-item p{margin:0;color:var(--muted)}
.sidebar-stack,.paper-aside{display:grid;gap:22px}
.side-card{padding:24px}
.rank-list{list-style:none;margin:0;padding:0}.rank-list li{display:grid;grid-template-columns:30px 1fr;gap:12px;padding:13px 0;border-top:1px solid var(--line);line-height:1.45}.rank-list li:first-child{border-top:0}.rank-list span{color:var(--accent);font-weight:900;font-size:13px}
.footprint-links{display:flex;flex-wrap:wrap;gap:9px}.footprint-links a{padding:6px 11px;border:1px solid var(--line);border-radius:999px;background:var(--soft);font-size:13px}
.pagination{display:flex;justify-content:center;align-items:center;gap:18px;padding-top:26px;border-top:1px solid var(--line);margin-top:20px}.pagination a{padding:8px 16px;border-radius:999px;background:var(--ink);color:#fff}.pagination span{color:var(--muted);font-size:13px}
.footer{margin-top:56px;padding:38px 0;background:#111827;color:#fff}.footer .shell{display:flex;justify-content:space-between;align-items:center}.footer p{margin:0;color:#9ca3af;font-size:13px}
.article-layout{margin-top:34px}.article-card{padding:44px}.breadcrumb{display:flex;gap:9px;margin-bottom:40px;color:var(--muted);font-size:13px}.article-card h1,.paper-article h1,.modern-article h1{margin:8px 0 18px;font-size:clamp(34px,5vw,58px);line-height:1.22;letter-spacing:-2px}.article-meta{display:flex;flex-wrap:wrap;gap:20px;color:var(--muted);font-size:13px}.article-summary{margin:42px 0;padding:28px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);font-size:20px;line-height:2}.article-summary p{margin:0}.source-box{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:22px;border-radius:14px;background:var(--soft)}.source-box p{margin:3px 0 0;color:var(--muted);font-size:13px}.source-box a,.source-button{padding:11px 17px;border-radius:10px;background:var(--accent);color:#fff;font-weight:800;white-space:nowrap}
.related-list article{padding:14px 0;border-top:1px solid var(--line)}.related-list article:first-child{border-top:0}.related-list h3{margin:2px 0;font-size:15px;line-height:1.55}

/* Theme 2: newspaper */
.theme-two{--ink:#181818;--muted:#676767;--line:#d7d1c7;--paper:#fffdf7;--soft:#f3efe6;--accent:#9e1c1c;background:#ece8df;font-family:Georgia,"Songti SC","SimSun",serif}
.paper-header{background:var(--paper);border-bottom:1px solid var(--line)}
.paper-date{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px solid var(--line);font:11px/1.5 Arial,sans-serif;letter-spacing:1px;text-transform:uppercase}
.paper-brand{padding:24px 0;text-align:center}.paper-brand a{font-size:clamp(34px,5vw,60px);font-weight:900;letter-spacing:5px}.paper-brand p{margin:0;font:10px/1.4 Arial,sans-serif;letter-spacing:5px;color:var(--muted)}
.paper-nav{border-top:3px double var(--ink)}.paper-nav .shell{display:flex;justify-content:center;gap:40px;padding:9px 0;font-size:14px;font-weight:700}
.paper-header.compact .paper-brand{padding:15px 0}.paper-header.compact .paper-brand a{font-size:34px}
.paper-main{padding-top:28px}.paper-lead{padding:48px max(24px,7vw);background:var(--paper);border-top:6px solid var(--ink);border-bottom:1px solid var(--line);text-align:center}.paper-lead h1{max-width:900px;margin:10px auto;font-size:clamp(36px,5vw,64px);line-height:1.18}.paper-lead>p:last-child{max-width:760px;margin:18px auto 0;color:var(--muted);font-size:18px}
.paper-columns{margin-top:28px}.paper-feed{border-radius:0;box-shadow:none}.paper-item{padding:27px 0;border-top:1px solid var(--line)}.paper-item:first-of-type{border-top:3px double var(--ink)}.paper-item h2{font-size:25px}.paper-aside .side-card{border-radius:0;box-shadow:none}
.paper-article-layout{margin-top:34px}.paper-article{padding:50px;background:var(--paper);border-top:6px solid var(--ink)}.paper-article h1{text-align:center}.paper-article .article-meta{justify-content:center;padding-bottom:25px;border-bottom:1px solid var(--line)}.paper-intro{font-size:22px;line-height:2.1}.paper-article blockquote{margin:32px 0;padding:18px 24px;border-left:4px solid var(--accent);background:var(--soft);color:var(--muted)}.source-button{display:inline-block;border-radius:0}

/* Theme 3: modern cards */
.theme-three{--ink:#172022;--muted:#667274;--line:#dce3df;--paper:#fff;--soft:#eef3ef;--accent:#00a36c;background:#eef3ef}
.modern-header{position:sticky;top:0;z-index:10;background:rgba(238,243,239,.92);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}.modern-header .shell{height:72px;display:flex;align-items:center;justify-content:space-between}.modern-brand{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:900}.modern-brand i{width:13px;height:13px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 6px rgba(0,163,108,.14)}
.modern-hero{padding:70px 0 100px;background:#142622;color:#fff}.modern-hero h1{margin:0;font-size:clamp(48px,8vw,92px);line-height:1.02;letter-spacing:-5px}.modern-hero>div>p:last-child{color:#9db1aa}
.modern-layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:28px;align-items:start;margin-top:-50px}.modern-feed{padding:30px;border-radius:24px;background:var(--paper);box-shadow:var(--shadow)}.card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.story-card{display:flex;flex-direction:column;min-height:260px;padding:24px;border:1px solid var(--line);border-radius:18px;background:#fff}.story-card.featured{grid-column:1/-1;min-height:300px;padding:34px;background:#e4f5ed}.story-card h2{margin:8px 0;font-size:22px;line-height:1.35}.story-card.featured h2{max-width:730px;font-size:clamp(30px,4vw,48px)}.story-card>p:not(.meta){color:var(--muted)}.read-more{margin-top:auto;color:var(--accent);font-weight:800}
.dark-card{background:#142622;color:#fff;border:0}.dark-card .rank-list li{border-color:rgba(255,255,255,.1)}.dark-card .rank-list a:hover{color:#65d8ae}
.modern-article-wrap{width:min(1040px,calc(100% - 36px));margin:44px auto}.modern-article{padding:clamp(28px,7vw,76px);border-radius:28px;background:#fff;box-shadow:var(--shadow)}.modern-article h1{max-width:900px}.summary-label{display:inline-block;margin-top:48px;padding:5px 12px;border-radius:999px;background:#dff5eb;color:#087851;font-size:12px;font-weight:900}.modern-summary{font-size:22px;line-height:2}.modern-source{display:flex;align-items:center;justify-content:space-between;margin-top:38px;padding:22px 26px;border-radius:15px;background:#142622;color:#fff;font-weight:900}.modern-source b{font-size:25px}.modern-related{display:grid;grid-template-columns:1fr 330px;gap:28px;margin-top:28px}.modern-related>section,.modern-related>.footprint-card{padding:28px;border-radius:20px;background:#fff;border:1px solid var(--line)}

@media (max-width:900px){.layout-main,.article-layout,.paper-columns,.paper-article-layout,.modern-layout,.modern-related{grid-template-columns:1fr}.hero{padding:34px}.hero-stat{display:none}.modern-layout{margin-top:-36px}.modern-related{display:grid}.paper-aside{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:640px){.shell{width:min(100% - 24px,1180px)}.topbar-inner,.modern-header .shell{height:62px}.topbar nav,.modern-header nav{gap:14px}.topbar nav a:nth-child(n+3),.modern-header nav a:nth-child(n+3){display:none}.hero{min-height:230px;margin:18px 0;padding:26px;border-radius:18px}.hero h1,.modern-hero h1{letter-spacing:-2px}.content-panel,.article-card,.paper-feed,.paper-article,.modern-feed,.modern-article{padding:22px}.news-row{grid-template-columns:1fr}.news-date{display:none}.layout-main,.article-layout{gap:18px}.article-card h1,.paper-article h1,.modern-article h1{font-size:34px;letter-spacing:-1px}.article-summary,.paper-intro,.modern-summary{font-size:18px}.source-box{align-items:flex-start;flex-direction:column}.source-box a{width:100%;text-align:center}.footer .shell{display:block}.footer p{margin-top:5px}.paper-date{display:none}.paper-brand{padding:16px 0}.paper-brand a{font-size:34px;letter-spacing:2px}.paper-nav .shell{gap:22px}.paper-lead{padding:32px 20px}.paper-aside{grid-template-columns:1fr}.modern-hero{padding:50px 0 80px}.card-grid{grid-template-columns:1fr}.story-card.featured{grid-column:auto}.modern-article-wrap{margin-top:20px}.pagination{gap:10px}.pagination a{padding:7px 11px}}

/* Plumber pool: eight single-content layouts */
.pool-page{--pool-accent:#0b72e7;--pool-ink:#172033;--pool-muted:#687188;--pool-line:#e1e6ee;--pool-paper:#fff;--pool-bg:#f3f6fa;margin:0;background:var(--pool-bg);color:var(--pool-ink);font:16px/1.75 -apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif}
.pool-theme-one{--pool-accent:#0b72e7;--pool-bg:#f3f6fa}
.pool-shell{width:min(1160px,calc(100% - 36px));margin-inline:auto}.pool-nav,.pool-dark-nav,.pool-manual-head,.pool-faq-head,.pool-check-head,.pool-wiki-head,.pool-mag-head{border-bottom:1px solid var(--pool-line);background:var(--pool-paper)}
.pool-nav .pool-shell,.pool-dark-nav .pool-shell,.pool-manual-head .pool-shell,.pool-faq-head .pool-shell,.pool-check-head .pool-shell,.pool-wiki-head .pool-shell,.pool-mag-head .pool-shell{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}.pool-nav a,.pool-dark-nav a,.pool-manual-head a,.pool-faq-head a,.pool-check-head a,.pool-wiki-head a,.pool-mag-head a{font-size:21px;font-weight:900}.pool-nav span,.pool-dark-nav span,.pool-faq-head span,.pool-check-head span,.pool-wiki-head span,.pool-mag-head span{color:var(--pool-muted);font-size:11px;font-weight:800;letter-spacing:1.6px}
.pool-grid,.pool-manual,.pool-faq-wrap,.pool-check-layout{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:28px;align-items:start;padding-block:38px}.pool-card,.pool-manual>article,.pool-faq-card,.pool-check-card,.pool-paper-story,.pool-wiki-article,.pool-mag-story{background:var(--pool-paper);border:1px solid var(--pool-line);box-shadow:0 18px 55px rgba(23,32,51,.08)}
.pool-card,.pool-manual>article,.pool-faq-card,.pool-check-card{padding:clamp(28px,5vw,60px);border-radius:22px}.pool-side{display:grid;gap:22px}.pool-side .side-card,.pool-dark-links .side-card,.pool-mag-side .side-card,.pool-wiki-related .side-card{border-color:var(--pool-line);box-shadow:none;background:var(--pool-paper)}
.pool-kicker{margin:0 0 12px;color:var(--pool-accent);font-size:12px;font-weight:900;letter-spacing:2px}.pool-page h1{margin:0 0 20px;font-size:clamp(36px,5vw,62px);line-height:1.13;letter-spacing:-2.4px}.pool-meta{color:var(--pool-muted);font-size:13px}.pool-answer{margin-top:38px;padding-top:30px;border-top:1px solid var(--pool-line);font-size:21px;line-height:1.95}.pool-source{display:inline-block;margin-top:30px;padding:11px 17px;border-radius:10px;background:var(--pool-accent);color:#fff!important;font-weight:800}.pool-footer{margin-top:44px;padding:30px 0;background:#111827;color:#aab4c5;font-size:13px}

.pool-theme-two{--pool-accent:#9b1717;--pool-ink:#191715;--pool-muted:#6d6760;--pool-line:#d6d0c5;--pool-paper:#fffdf7;--pool-bg:#ede9e1;font-family:Georgia,"Times New Roman",serif}.pool-paper-head{padding:16px 0 22px;border-bottom:4px double var(--pool-ink);background:var(--pool-paper);text-align:center}.pool-paper-head p{margin:0;font:10px/1.5 Arial,sans-serif;letter-spacing:2px}.pool-paper-head a{font-size:clamp(34px,5vw,58px);font-weight:900;letter-spacing:4px}.pool-paper-layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:30px;align-items:start;padding-top:36px}.pool-paper-story{padding:clamp(30px,6vw,70px);border-radius:0;border-top:7px solid var(--pool-ink)}.pool-paper-story h1{text-align:center}.pool-paper-story .pool-meta{text-align:center;padding-bottom:24px;border-bottom:1px solid var(--pool-line)}.pool-paper-lead{font-size:23px;line-height:2.05}

.pool-theme-three{--pool-accent:#39d99f;--pool-ink:#edf9f5;--pool-muted:#9ab6ad;--pool-line:#294a41;--pool-paper:#15352d;--pool-bg:#0c211c}.pool-dark-nav{background:#0c211c;border-color:#294a41}.pool-dark-nav a{color:#fff}.pool-dark-nav a i{display:inline-block;width:12px;height:12px;margin-right:10px;border-radius:50%;background:var(--pool-accent);box-shadow:0 0 0 6px rgba(57,217,159,.13)}.pool-dark-wrap{width:min(1040px,calc(100% - 36px));margin:44px auto}.pool-dark-answer{padding:clamp(32px,7vw,80px);border:1px solid var(--pool-line);border-radius:28px;background:linear-gradient(145deg,#183b32,#102a23);box-shadow:0 30px 80px rgba(0,0,0,.25)}.pool-dark-answer .pool-answer{color:#dcebe6}.pool-dark-links{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:24px}.pool-theme-three .side-card{color:#dcebe6}.pool-theme-three .footprint-links a{border-color:#365b50;background:#173b32}.pool-theme-three .section-heading h2{color:#fff}

.pool-theme-four{--pool-accent:#ef7a16;--pool-ink:#26333a;--pool-muted:#697980;--pool-line:#dbe2e5;--pool-paper:#fff;--pool-bg:#edf2f3}.pool-manual-head{border-top:6px solid var(--pool-accent)}.pool-manual-head b{padding:6px 10px;background:var(--pool-ink);color:#fff;font-size:11px;letter-spacing:1.8px}.pool-manual>article{border-radius:5px;box-shadow:none}.pool-manual-label{display:inline-block;margin-bottom:24px;padding:6px 10px;background:#fff2e7;color:#b94f00;font-size:11px;font-weight:900;letter-spacing:1.3px}.pool-manual-answer{margin-top:34px;padding:28px;border-left:5px solid var(--pool-accent);background:#f7f9fa}.pool-manual-answer h2{margin-top:0;font-size:18px}.pool-manual-answer p{margin-bottom:0;font-size:20px}

.pool-theme-five{--pool-accent:#6546d7;--pool-ink:#272238;--pool-muted:#766f8b;--pool-line:#e4def8;--pool-paper:#fff;--pool-bg:#f4f1ff}.pool-faq-head{background:#2a204d;color:#fff}.pool-faq-head a,.pool-faq-head span{color:#fff}.pool-faq-card{border-radius:26px}.pool-faq-q{display:inline-block;margin:0 0 12px;padding:5px 10px;border-radius:999px;background:#eee9ff;color:#573bc4;font-size:11px;font-weight:900;letter-spacing:1.6px}.pool-faq-a{margin-top:34px;padding:30px;border-radius:18px;background:#f6f3ff}.pool-faq-a b{color:var(--pool-accent);font-size:12px;letter-spacing:1.6px}.pool-faq-a p{margin-bottom:0;font-size:21px;line-height:1.9}

.pool-theme-six{--pool-accent:#087d68;--pool-ink:#1c302d;--pool-muted:#667c77;--pool-line:#d5e5e1;--pool-paper:#fff;--pool-bg:#eef7f5}.pool-check-head{border-bottom:3px solid var(--pool-accent)}.pool-check-card{position:relative;overflow:hidden}.pool-number{position:absolute;right:28px;top:12px;color:#e1f0ed;font-size:110px;font-weight:900;line-height:1}.pool-check-card h1,.pool-check-card .pool-kicker{position:relative}.pool-check-answer{display:grid;grid-template-columns:42px 1fr;gap:18px;margin-top:36px;padding:28px;border:1px solid var(--pool-line);border-radius:14px;background:#f7fbfa}.pool-check-answer>span{display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:var(--pool-accent);color:#fff;font-weight:900}.pool-check-answer p{margin:0;font-size:20px}

.pool-theme-seven{--pool-accent:#2563a5;--pool-ink:#202a35;--pool-muted:#667482;--pool-line:#d7e0e7;--pool-paper:#fff;--pool-bg:#f4f7f9}.pool-wiki-head{background:#243b53;color:#fff}.pool-wiki-head a,.pool-wiki-head span{color:#fff}.pool-wiki-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:30px;align-items:start;padding-block:40px}.pool-wiki-index{position:sticky;top:24px;display:grid;gap:12px;padding:22px;border-left:4px solid var(--pool-accent);background:#eaf2f8;color:var(--pool-muted);font-size:13px}.pool-wiki-index strong{color:var(--pool-ink);font-size:11px;letter-spacing:1.4px}.pool-wiki-article{padding:clamp(30px,5vw,64px);box-shadow:none}.pool-wiki-article h2{margin-top:38px;padding-bottom:8px;border-bottom:1px solid var(--pool-line)}.pool-wiki-article>p{font-size:20px}.pool-wiki-related{margin-top:42px}

.pool-theme-eight{--pool-accent:#d84d2f;--pool-ink:#241f1c;--pool-muted:#796f68;--pool-line:#e2d9d2;--pool-paper:#fffaf5;--pool-bg:#f1e9e1;font-family:Georgia,"Times New Roman",serif}.pool-mag-head{background:#221d1a;color:#fff}.pool-mag-head a,.pool-mag-head span{color:#fff}.pool-mag-wrap{width:min(1180px,calc(100% - 36px));display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:0;margin:42px auto;background:var(--pool-paper);box-shadow:0 24px 70px rgba(50,30,20,.12)}.pool-mag-story{padding:clamp(34px,6vw,76px);border:0;border-right:1px solid var(--pool-line);box-shadow:none}.pool-mag-category{color:var(--pool-accent);font:800 11px/1.4 Arial,sans-serif;letter-spacing:1.8px}.pool-mag-copy{margin-top:38px;padding-top:30px;border-top:3px double var(--pool-ink);font-size:22px;line-height:2}.pool-mag-side{display:grid;align-content:start;gap:20px;padding:28px}.pool-theme-eight .side-card{border-radius:0}

@media(max-width:900px){.pool-grid,.pool-paper-layout,.pool-manual,.pool-faq-wrap,.pool-check-layout,.pool-dark-links,.pool-mag-wrap{grid-template-columns:1fr}.pool-mag-story{border-right:0;border-bottom:1px solid var(--pool-line)}.pool-wiki-layout{grid-template-columns:1fr}.pool-wiki-index{position:static;display:none}}
@media(max-width:640px){.pool-shell{width:min(100% - 24px,1160px)}.pool-nav .pool-shell,.pool-dark-nav .pool-shell,.pool-manual-head .pool-shell,.pool-faq-head .pool-shell,.pool-check-head .pool-shell,.pool-wiki-head .pool-shell,.pool-mag-head .pool-shell{min-height:62px}.pool-nav span,.pool-dark-nav span,.pool-faq-head span,.pool-check-head span,.pool-wiki-head span,.pool-mag-head span{display:none}.pool-grid,.pool-manual,.pool-faq-wrap,.pool-check-layout{padding-block:20px;gap:18px}.pool-page h1{font-size:34px;letter-spacing:-1px}.pool-answer,.pool-paper-lead,.pool-faq-a p,.pool-check-answer p,.pool-wiki-article>p,.pool-mag-copy{font-size:18px}.pool-dark-wrap,.pool-mag-wrap{width:min(100% - 24px,1180px);margin:20px auto}.pool-dark-answer,.pool-mag-story,.pool-mag-side{padding:24px}.pool-paper-head a{font-size:30px;letter-spacing:2px}.pool-paper-head p{display:none}.pool-check-answer{grid-template-columns:1fr}.pool-number{font-size:80px}}