:root{--page:#f7faff;--surface:#fff;--surface-soft:#eef5ff;--line:#dce7f5;--line-strong:#bfd3ee;--text:#10213a;--muted:#61728a;--blue:#1769e0;--blue-dark:#0d4faf;--green:#147a52;--shadow:0 12px 32px rgba(28,73,133,.09)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--page);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
[hidden]{display:none!important}
.shell{width:min(1120px,calc(100% - 40px));margin-inline:auto}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}
.nav-row{height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:1.2rem;font-weight:850}
.brand-mark{width:34px;height:34px;border-radius:8px;background:linear-gradient(145deg,#48a5ff,#1769e0);position:relative;box-shadow:0 6px 18px rgba(23,105,224,.22)}
.brand-mark:after{content:"";position:absolute;inset:9px;border:1px solid rgba(255,255,255,.72);border-radius:50%}
.main-nav{display:flex;align-items:center;gap:24px;color:var(--muted);font-size:.92rem;font-weight:650}
.main-nav a:hover,.main-nav .active{color:var(--blue)}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:0 16px;border:1px solid transparent;border-radius:6px;font-size:.9rem;font-weight:800;cursor:pointer}
.button-primary{background:var(--blue);color:#fff}.button-primary:hover{background:var(--blue-dark)}
.button-outline{background:#fff;border-color:var(--line-strong);color:var(--blue-dark)}
.hero{padding:46px 0 28px}
.hero-copy{max-width:760px}.eyebrow,.section-kicker{margin:0 0 5px;color:var(--blue);font-size:.77rem;font-weight:850;text-transform:uppercase}
h1,h2,h3,p{margin-top:0}h1{margin-bottom:10px;font-size:2.55rem;line-height:1.18;letter-spacing:0}.hero-copy>p:last-child{margin-bottom:24px;color:var(--muted);font-size:1.05rem}
.search-area{position:relative;max-width:820px}.search-control{position:relative}.search-symbol{position:absolute;left:18px;top:50%;width:15px;height:15px;border:2px solid #71839a;border-radius:50%;transform:translateY(-55%)}.search-symbol:after{content:"";position:absolute;width:7px;height:2px;background:#71839a;right:-6px;bottom:-3px;transform:rotate(45deg)}
.search-control input{width:100%;height:54px;padding:0 48px;border:1px solid var(--line-strong);border-radius:8px;background:#fff;color:var(--text);outline:none;box-shadow:0 8px 24px rgba(28,73,133,.07)}.search-control input:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(23,105,224,.12)}
.search-results{position:absolute;z-index:40;left:0;right:0;top:61px;max-height:430px;overflow:auto;padding:7px;background:#fff;border:1px solid var(--line-strong);border-radius:8px;box-shadow:var(--shadow)}
.search-result{display:block;padding:11px 12px;border-radius:6px}.search-result:hover,.search-result.selected{background:var(--surface-soft)}.search-result strong{display:block;font-size:.93rem;line-height:1.35}.search-result span{display:block;margin-top:3px;color:var(--muted);font-size:.8rem}.search-empty{padding:16px}.search-empty p{margin-bottom:12px;color:var(--muted);font-size:.9rem}.search-empty-actions{display:flex;gap:8px;flex-wrap:wrap}
.quick-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:13px}.quick-links a{padding:5px 10px;border:1px solid var(--line);border-radius:5px;background:rgba(255,255,255,.72);color:#43566f;font-size:.82rem;font-weight:700}.quick-links a:hover{border-color:var(--blue);color:var(--blue)}
.content-section{padding:34px 0}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:17px}.section-heading>div{min-width:0}.section-heading h2{margin:0;font-size:1.55rem;line-height:1.25}.section-heading>a,.section-heading>span{color:var(--muted);font-size:.85rem}.section-heading>a{flex:0 0 auto;color:var(--blue);font-weight:750;white-space:nowrap}
.category-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.category-card{min-height:158px;padding:18px;display:flex;flex-direction:column;border:1px solid var(--line);border-radius:8px;background:#fff}.category-card:hover{border-color:var(--line-strong);box-shadow:var(--shadow)}.category-top{display:flex;align-items:center;gap:11px}.category-icon{width:36px;height:36px;flex:0 0 36px;display:grid;place-items:center;border-radius:7px;background:var(--surface-soft);color:var(--blue);font-size:.76rem;font-weight:900}.category-card h3{margin:0;font-size:1.02rem}.category-card p{margin:9px 0 15px;color:var(--muted);font-size:.88rem;line-height:1.55}.category-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;color:var(--muted);font-size:.8rem}.category-meta b{color:var(--blue);font-size:.82rem}
.popular-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.article-tile{min-height:150px;padding:17px;display:flex;flex-direction:column;border:1px solid var(--line);border-radius:8px;background:#fff}.article-tile:hover{border-color:var(--blue)}.article-label{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:11px;color:var(--muted);font-size:.76rem}.article-label span:first-child{color:var(--blue);font-weight:800}.article-tile h3{margin:0 0 8px;font-size:1rem;line-height:1.45}.article-tile p{margin:0;color:var(--muted);font-size:.84rem;line-height:1.55}.article-more{margin-top:auto;padding-top:12px;color:var(--blue);font-size:.82rem;font-weight:800}
.latest-list{border-top:1px solid var(--line)}.latest-row{display:grid;grid-template-columns:100px minmax(0,1.2fr) minmax(240px,1fr);gap:20px;align-items:center;padding:15px 2px;border-bottom:1px solid var(--line)}.latest-row time{color:var(--muted);font-size:.8rem}.latest-title strong{display:block;font-size:.95rem;line-height:1.4}.latest-title span{display:block;margin-top:3px;color:var(--blue);font-size:.76rem;font-weight:750}.latest-row p{margin:0;color:var(--muted);font-size:.84rem;line-height:1.5}.latest-row:hover strong{color:var(--blue)}
.support-band{margin-top:38px;padding:32px 0;background:#eaf3ff;border-block:1px solid #d4e4f8}.support-inner{display:flex;align-items:center;justify-content:space-between;gap:36px}.support-inner h2{margin-bottom:7px;font-size:1.35rem}.support-inner p:not(.section-kicker){margin:0;color:var(--muted);font-size:.9rem}.support-actions{display:flex;gap:9px;flex:0 0 auto}
.site-footer{padding:28px 0 38px;background:#fff;border-top:1px solid var(--line)}.footer-row{display:flex;align-items:center;justify-content:space-between;gap:24px}.footer-row p{margin:7px 0 0;color:var(--muted);font-size:.82rem}.footer-links{display:flex;gap:20px;color:var(--muted);font-size:.85rem}
.breadcrumbs{display:flex;flex-wrap:wrap;gap:8px;padding-top:22px;color:var(--muted);font-size:.82rem}.breadcrumbs a{color:var(--blue);font-weight:750}
.category-hero{padding:27px 0 20px}.category-hero h1{font-size:2rem}.category-hero>.category-lead{max-width:760px;margin-bottom:19px;color:var(--muted)}.category-stat{display:inline-flex;margin-bottom:10px;padding:4px 8px;border-radius:5px;background:var(--surface-soft);color:var(--blue);font-size:.78rem;font-weight:800}
.category-tools{display:flex;align-items:center;justify-content:space-between;gap:18px;margin:12px 0 18px}.filter-list{display:flex;flex-wrap:wrap;gap:7px}.filter-button{min-height:34px;padding:0 12px;border:1px solid var(--line);border-radius:5px;background:#fff;color:var(--muted);font-size:.8rem;font-weight:750;cursor:pointer}.filter-button.active{border-color:var(--blue);background:var(--blue);color:#fff}
.category-articles{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:11px}.category-article{min-height:136px;padding:17px;display:flex;flex-direction:column;border:1px solid var(--line);border-radius:8px;background:#fff}.category-article:hover{border-color:var(--blue)}.category-article h2{margin:7px 0;font-size:1.03rem;line-height:1.45}.category-article p{margin:0;color:var(--muted);font-size:.84rem}.category-article-footer{display:flex;justify-content:space-between;gap:12px;margin-top:auto;padding-top:12px;color:var(--muted);font-size:.77rem}.category-article-footer b{color:var(--blue)}
.related-strip{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.related-link{padding:14px;border:1px solid var(--line);border-radius:8px;background:#fff}.related-link strong{display:block;font-size:.9rem}.related-link span{display:block;margin-top:4px;color:var(--muted);font-size:.78rem}
@media(max-width:850px){.main-nav{display:none}.category-grid,.popular-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.latest-row{grid-template-columns:90px 1fr}.latest-row p{grid-column:2}.support-inner{align-items:flex-start;flex-direction:column}.category-articles{grid-template-columns:1fr}.related-strip{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.shell{width:min(100% - 28px,1120px)}.nav-row{height:62px}.nav-action{display:none}.hero{padding:32px 0 20px}h1{font-size:2rem}.search-control input{height:52px;padding-left:46px;font-size:.88rem}.quick-links{gap:6px}.content-section{padding:27px 0}.section-heading{align-items:flex-start;gap:12px}.section-heading h2{font-size:1.4rem}.section-heading>a{font-size:.78rem}.section-heading>span{display:none}.category-grid,.popular-grid{grid-template-columns:1fr}.category-card{min-height:142px}.latest-row{grid-template-columns:1fr;gap:4px}.latest-row p{grid-column:1}.support-actions{width:100%}.support-actions .button{flex:1}.footer-row{align-items:flex-start;flex-direction:column}.footer-links{flex-wrap:wrap}.category-hero h1{font-size:1.75rem}.category-tools{align-items:flex-start;flex-direction:column}.related-strip{grid-template-columns:1fr}}