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4px;color:var(--muted)}.paper-group{margin-bottom:30px}.paper-group-head{display:flex;align-items:baseline;gap:10px;margin-bottom:12px;padding-bottom:8px;border-bottom:1px solid var(--line)}.paper-group-head h2{margin:0}.section{background:#fff;border-radius:12px;padding:28px 30px 34px;margin:22px 0;box-shadow:0 2px 12px rgba(20,24,35,.045)}.section-head{position:relative;text-align:center;margin-bottom:24px}.section-head h2{display:inline-block;position:relative;margin:0;padding-bottom:12px;font-size:22px;font-weight:700}.section-head h2:after{content:"";position:absolute;left:50%;bottom:0;transform:translateX(-50%);width:46px;height:3px;border-radius:3px;background:var(--brand)}.section-head .sub{margin:8px 0 0}.section-head .sub,.section-more{color:var(--muted);font-size:14px}.section-more{position:absolute;right:0;bottom:14px}.section-more:hover{color:var(--brand)}.subject-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:18px;gap:18px}@media 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0,rgba(232,239,255,0) 70%),radial-gradient(760px 400px at 88% 82%,#fff1e4 0,rgba(255,241,228,0) 70%),#f7f8fb}.auth-card{width:100%;max-width:402px;background:#fff;border-radius:14px;padding:32px 34px 28px;box-shadow:0 16px 48px rgba(28,36,54,.1)}.auth-card h2{margin:0 0 4px;font-size:22px}.auth-sub{margin:0 0 20px;font-size:13px;color:var(--muted)}.subject-hero{padding:34px 0 30px;border-bottom:1px solid var(--line)}.subject-hero-stats{display:flex;gap:28px;flex:none}.subject-hero-stats div{text-align:center}.subject-hero-stats b{display:block;font-size:22px;font-weight:800;line-height:1.25;color:var(--text)}.subject-hero-stats span{font-size:12.5px;color:var(--muted)}@media (max-width:760px){.subject-hero-stats{gap:18px}}.cat-card{display:flex;flex-direction:column;gap:10px;padding:18px 18px 15px;background:#fff;border:1px solid var(--line);border-radius:10px;transition:transform .18s,box-shadow .18s,border-color .18s}.cat-card:hover{transform:translateY(-2px);border-color:#ffd0ae;box-shadow:0 8px 22px rgba(244,110,24,.1)}.cat-name{font-size:15.5px;font-weight:600}.cat-go{color:var(--brand);font-size:13.5px;font-weight:500}.section .filters{background:#f7f8fa;border-color:#eef0f3;margin-bottom:22px}.chip:hover{border-color:#ffcfad;background:var(--brand-soft);color:var(--brand)}.chip.on{background:var(--brand);border-color:var(--brand)}.chip.on,.chip.on:hover{color:#fff}.paper-group-head{border-bottom:1px solid #f0f1f3}.paper-group-head h2{font-size:17px;font-weight:700}.card{border-color:#eef0f3;box-shadow:0 2px 10px rgba(20,24,35,.04)}.hero-stat b{margin-bottom:2px}.hero-stat span{display:block}.hero-contact{position:absolute;right:0;bottom:0;z-index:2}.hero-contact img{display:block;width:320px;height:auto}@media (max-width:900px){.nav-inner{padding:0 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0}.paper-table{min-width:720px}.filter-row{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch;padding-bottom:2px}.filter-row::-webkit-scrollbar{display:none}.filter-row .chip{flex:0 0 auto}.filter-label{position:-webkit-sticky;position:sticky;left:0;z-index:1;background:#f7f8fa}.subject-hero{padding:22px 0 20px}.subject-hero-stats{gap:16px}.subject-hero-stats b{font-size:18px}.footer-inner{padding:26px 16px 18px}.auth-card{padding:26px 22px 22px}}