:root{--paper:#fff8f8;--white:#fff;--soft:#fbe9ec;--ink:#351c23;--body:#4b3037;--muted:#76545f;--rose:#c9365b;--line:#edd8de;--deep:#321c24}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--body);font:16px/1.83 system-ui,-apple-system,"Microsoft YaHei",sans-serif;overflow-wrap:anywhere}img{display:block;max-width:100%;height:auto}a{color:inherit;text-decoration:none}a:hover{color:var(--rose)}a:focus-visible,button:focus-visible{outline:3px solid var(--rose);outline-offset:3px}button{font:inherit;cursor:pointer}h1,h2,h3,p,figure{margin-top:0}h1,h2,h3{color:var(--ink);line-height:1.38;letter-spacing:.015em}h1{font-size:clamp(28px,3.4vw,36px)}h2{font-size:clamp(22px,2.6vw,26px)}h3{font-size:clamp(18px,2vw,20px)}p{margin-bottom:1.1em}.shell{width:min(1160px,calc(100% - 56px));margin-inline:auto}.skip{position:absolute;transform:translateY(-150%);background:white;padding:10px;z-index:9}.skip:focus{transform:none}.site-head{background:white;border-bottom:1px solid var(--line)}.finebar{height:28px;background:var(--soft);font-size:13px;color:var(--muted)}.fine-inner{display:flex;justify-content:space-between;align-items:center;height:100%}.fine-right{display:flex;gap:22px}.masthead{min-height:84px;display:flex;align-items:center;justify-content:space-between;gap:18px}.brand,.footer-brand>a{display:inline-flex;align-items:center;gap:13px;min-width:0}.brand img,.footer-logo{max-width:160px;max-height:42px;object-fit:contain}.brand strong,.footer-brand strong{display:block;font-size:25px;color:var(--ink);white-space:nowrap;line-height:1.15}.brand small,.footer-brand small{font:700 11px/1.5 Georgia,serif;letter-spacing:.22em;color:var(--rose)}.mast-actions{display:flex;gap:22px;align-items:center}.tagline{font-size:14px;color:var(--muted)}.mobile-read{border:1px solid var(--rose);color:var(--rose);border-radius:8px;padding:8px 17px;min-height:44px;display:flex;align-items:center}.desktop-nav{border-top:1px solid var(--line);position:relative}.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:10px}.main-links{display:flex;align-items:center;gap:clamp(10px,1.7vw,25px);white-space:nowrap}.main-links>a{font-size:14px;display:flex;align-items:center;height:54px;position:relative}.main-links>a[aria-current=page]:after{content:"";position:absolute;height:2px;background:var(--rose);bottom:0;left:0;right:0}.more-toggle,.mobile-menu-toggle{border:0;background:none;color:var(--ink);min-height:44px;font-size:14px;white-space:nowrap}.extra-panel{display:grid;grid-template-columns:1fr 1fr;gap:28px;background:white;border:1px solid var(--line);border-top:2px solid var(--rose);padding:24px;margin-bottom:12px;box-shadow:0 10px 20px #351c230d}.extra-panel[hidden],.mobile-panel[hidden]{display:none!important}.extra-panel h2,.mobile-panel h2{font-size:17px;margin:0 0 8px}.extra-panel>div{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 20px}.extra-panel h2{grid-column:1/-1}.extra-panel a,.mobile-panel a{font-size:14px;min-height:40px;display:flex;align-items:center}.quick-nav,.mobile-menu-toggle,.mobile-panel{display:none}.section{padding:54px 0;border-bottom:1px solid var(--line)}.section-white{background:white}.section-soft{background:var(--soft)}.eyebrow{color:var(--rose);font-size:13px;font-weight:700;letter-spacing:.12em;margin-bottom:12px}.section-title{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:23px}.section-title h2{margin:0}.section-title>a,.text-link{color:var(--rose);font-weight:650}.intro{max-width:740px}.intro p,.article-lead{font-size:17px;line-height:1.9;color:var(--body)}.banner-picture{margin:24px 0 14px;display:flex;flex-direction:column;align-items:center}.banner-picture img{max-height:340px;max-width:100%;width:auto;height:auto;object-fit:contain;object-position:center}.banner-picture figcaption,.article-picture figcaption,.card-picture figcaption{font-size:13px;color:var(--muted);padding-top:7px}.link-pair{display:flex;flex-wrap:wrap;gap:10px 24px}.link-pair a{color:var(--rose);font-weight:650}.layout-70{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,3fr);gap:32px;align-items:start}.split{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.card{background:white;border:1px solid var(--line);border-radius:12px;padding:22px;min-width:0}.card p:last-child{margin-bottom:0}.card-picture{display:flex;flex-direction:column;align-items:center;justify-content:center;margin:0 0 15px}.card-picture img{max-height:230px;max-width:100%;width:auto;object-fit:contain;object-position:center}.article-picture{display:flex;flex-direction:column;align-items:center;margin:20px 0 28px}.article-picture img{max-width:min(100%,720px);max-height:420px;width:auto;height:auto;object-fit:contain;object-position:center}.article-picture figcaption{text-align:center}.reading-steps{margin:0;padding-left:24px}.reading-steps li{padding:0 0 14px}.reading-steps a{color:var(--rose)}.themed-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 28px}.themed-list article{border-top:1px solid var(--line);padding:18px 0}.themed-list h3{margin:0 0 7px}.themed-list p{margin-bottom:8px}.five-links{display:grid;gap:13px}.five-links a{display:block;border-bottom:1px solid var(--line);padding-bottom:10px}.vertical-reads{display:grid;gap:12px}.vertical-reads article{display:grid;grid-template-columns:minmax(130px,1fr) 2.5fr auto;align-items:center;gap:16px;background:white;border:1px solid var(--line);border-radius:9px;padding:16px}.vertical-reads h3,.vertical-reads p{margin:0}.vertical-reads>a,.vertical-reads article>a{color:var(--rose);font-weight:650}.ray-demo{border-radius:12px;min-height:130px;background:linear-gradient(110deg,#fff 0%,#fff 39%,#f6d8df 40%,#f6d8df 54%,#fff 55%,#fff 100%);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;gap:14px;margin-top:20px}.ray-demo span{display:block;width:18px;height:45px;transform:skew(-22deg);background:var(--rose);opacity:.5;border-radius:3px}.ray-demo span:nth-child(2){height:65px;opacity:.75}.ray-demo span:nth-child(3){height:85px;opacity:1}.app-visual{display:flex;align-items:center;gap:25px;justify-content:center}.app-visual img{max-width:260px;max-height:380px;object-fit:contain}.app-visual .app-icon{max-width:44px;max-height:44px}.service-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.breadcrumbs{color:var(--muted);font-size:14px;margin-bottom:22px}.breadcrumbs a{color:var(--rose)}.article-head{padding:47px 0 20px}.article-head h1{margin-bottom:19px}.article-shell{max-width:1160px;margin:auto}.article-layout{display:grid;grid-template-columns:minmax(0,740px) minmax(190px,1fr);gap:32px;align-items:start;padding-bottom:35px}.article-body{min-width:0}.article-body section{padding:22px 0;border-top:1px solid var(--line)}.article-body section:first-child{border-top:0}.article-body h2{margin:0 0 14px}.article-body p{font-size:16px;line-height:1.9}.article-aside{background:white;padding:22px;border:1px solid var(--line);border-radius:12px}.article-aside h2{font-size:19px}.article-aside a{display:block;border-top:1px solid var(--line);padding:10px 0;color:var(--rose)}.related{border-top:1px solid var(--line);padding:25px 0 48px}.related h2{font-size:21px}.related a{display:inline-flex;margin:0 24px 10px 0;color:var(--rose)}.qa section{padding:18px 0}.qa section h2{font-size:19px}.footer{background:var(--deep);color:#f7e8ed;padding:47px 0 24px}.footer-brand>a strong{color:white}.footer-brand p{max-width:520px;margin:14px 0 26px;color:#e2c9d0}.footer-columns{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:25px}.footer h2{color:white;font-size:18px}.footer-columns a{display:block;padding:5px 0;min-height:35px;color:#ead5dc;font-size:14px}.footer a:hover{color:white;text-decoration:underline}.footer-last{margin-top:28px;padding-top:20px;border-top:1px solid #795762;display:flex;justify-content:space-between;gap:20px;font-size:13px;color:#e2c9d0}.footer-last p{margin:0}@media(max-width:1000px){.tagline{display:none}.main-links{gap:10px}.main-links>a{font-size:13px}.nav-inner{gap:4px}}@media(max-width:859px){.layout-70,.article-layout{grid-template-columns:1fr}.article-aside{display:none}.shell{width:calc(100% - 48px)}.vertical-reads article{grid-template-columns:1fr auto}.vertical-reads article p{grid-column:1/-1;grid-row:2}}@media(max-width:700px){.desktop-nav,.fine-right,.mobile-read{display:none}.finebar{height:28px}.masthead{min-height:68px}.brand strong{font-size:21px}.brand img{max-width:108px;max-height:38px}.mobile-menu-toggle{display:block}.quick-nav{display:block;border-top:1px solid var(--line)}.quick-inner{display:flex;gap:25px;overflow-x:auto;scrollbar-width:thin;white-space:nowrap}.quick-inner a{font-size:14px;display:flex;align-items:center;min-height:48px}.quick-inner a[aria-current=page]{border-bottom:2px solid var(--rose);color:var(--rose)}.mobile-panel{display:grid;gap:20px;padding-block:22px;border-top:1px solid var(--line);background:white}.mobile-panel section{border-bottom:1px solid var(--line)}.mobile-panel-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:2px 12px}.shell{width:calc(100% - 32px)}.section{padding:34px 0}.split,.themed-list,.service-row,.footer-columns{grid-template-columns:1fr}.card{padding:17px}.card-picture img{max-height:200px}.banner-picture img{max-height:260px}.article-picture img{max-height:320px}.article-head{padding:30px 0 14px}.article-body section{padding:18px 0}.article-body p{font-size:15.5px}.app-visual{justify-content:flex-start}.app-visual img{max-width:210px}.app-visual .app-icon{max-width:44px}.footer-last{flex-wrap:wrap}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}