:root{--page:#F6F5F1;--paper:#FFFFFF;--soft:#EDF2F3;--dark:#203646;--heading:#20303B;--body:#3B4A54;--muted:#64737D;--brand:#137C87;--brand-dark:#115460;--accent:#C97751;--line:#DCE3E4;--on-dark:#F7FAFA}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--page);color:var(--body);font:16px/1.78 system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;overflow-x:hidden}button,input{font:inherit}button{cursor:pointer}a{color:var(--brand-dark);text-decoration:none}a:hover{text-decoration:underline}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid var(--accent);outline-offset:3px}img{width:100%;height:auto;max-width:100%;display:block;object-fit:contain;object-position:center}.wrap{max-width:1160px;margin:auto;padding-inline:32px;min-width:0}h1,h2,h3{color:var(--heading);line-height:1.32;letter-spacing:.01em}h1{font-size:clamp(28px,3vw,38px);margin:0 0 20px}h2{font-size:clamp(22px,2.3vw,26px);margin:0 0 18px}h3{font-size:19px;margin:0 0 10px}p{margin:0 0 16px}small,.eyebrow{font-size:13px;color:var(--muted)}.eyebrow{letter-spacing:.14em;color:var(--brand);font-weight:700}.site-header{background:#fff;border-bottom:1px solid var(--line)}.brand-bar{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:100px}.brand{display:flex;align-items:center;min-width:0;gap:13px;color:var(--heading)}.brand-logo{width:94px;max-height:75px;object-fit:contain;flex-shrink:0}.brand-copy{display:flex;flex-direction:column;min-width:0;white-space:nowrap;line-height:1.3}.brand-copy strong{font-size:20px}.brand-copy small{font-size:10px;letter-spacing:.1em;color:var(--brand)}.header-actions{display:flex;align-items:center;gap:12px}.plain-button,.desktop-app,.nav-overview{border:1px solid var(--line);background:white;border-radius:8px;padding:9px 16px;color:var(--heading);font-size:14px}.desktop-app{background:var(--soft);border-color:transparent}.top-nav{border-top:1px solid 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@media(max-width:1024px){.wrap{padding-inline:24px}.nav-inner{gap:16px}.article-layout{grid-template-columns:minmax(0,1fr) 190px;gap:25px}.brand-logo{width:82px}}
@media(max-width:767px){body{font-size:15px;line-height:1.76}.wrap{padding-inline:17px}.brand-bar{min-height:64px}.brand-logo{width:54px;max-height:52px}.brand{gap:6px}.brand-copy strong{font-size:17px}.brand-copy small{font-size:8px;letter-spacing:0}.desktop-search,.desktop-app,.top-nav{display:none}.mobile-menu{display:block;border:0;background:var(--soft);color:var(--heading);border-radius:9px;min-width:44px;min-height:44px;font-size:22px}.site-main{padding-top:26px;padding-bottom:calc(82px + env(safe-area-inset-bottom))}h1{font-size:28px}h2{font-size:23px}h3{font-size:18px}.hero{grid-template-columns:1fr;gap:24px;padding:0 0 35px}.hero-image{padding:6px}.content-section{padding:30px 0}.section-head{display:block}.feature-grid,.pair-grid,.weekly-grid,.dark-banner,.page-top,.article-layout{grid-template-columns:1fr;gap:17px}.tool-grid{grid-template-columns:1fr}.tool-grid a{padding:16px}.page-top{padding-bottom:24px}.page-top .page-art{max-width:400px;justify-self:center}.article-side{display:none}.article-block{padding:25px 0}.dark-banner{padding:25px}.dark-banner img{max-width:290px}.quickstrip{display:flex;gap:8px;overflow-x:auto;scrollbar-width:thin;max-width:100%;margin:17px 0 8px;padding-bottom:9px}.quickstrip a{white-space:nowrap;flex:0 0 auto;background:white;border:1px solid var(--line);padding:6px 12px;border-radius:100px;font-size:13px}.quickstrip a[aria-current]{color:white;background:var(--brand)}.mobile-bottom{display:grid;grid-template-columns:repeat(3,1fr);position:fixed;bottom:0;left:0;right:0;z-index:50;background:white;border-top:1px solid var(--line);height:calc(54px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom a,.mobile-bottom button{display:flex;align-items:center;justify-content:center;background:transparent;border:0;min-height:54px;font-size:14px;color:var(--heading)}.mobile-bottom [aria-current]{color:var(--brand);font-weight:700}.menu-panel{top:auto;bottom:0;left:0;right:0;border-radius:18px 18px 0 0;max-height:82vh;padding:20px 18px calc(20px + env(safe-area-inset-bottom))}.menu-groups{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.menu-sites{gap:12px}.search-panel{top:8vh}.footer-intro{grid-template-columns:1fr;gap:14px}.footer-logo{max-width:120px}.footer-groups{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.site-footer{padding-bottom:calc(95px + env(safe-area-inset-bottom))}.footer-bottom{display:block}.footer-bottom a{display:inline-block;margin-bottom:8px}.summary-line{padding:17px}}
@media(min-width:768px) and (max-width:870px){.nav-inner>a:nth-of-type(3){display:none}.nav-inner{gap:14px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}