:root{--bg:#FFF8F8;--paper:#fff;--soft:#FBE9EC;--ink:#351C23;--body:#4B3037;--muted:#76545F;--accent:#C9365B;--footer:#321C24;--line:#EDD8DE}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--body);font-family:system-ui,-apple-system,"Segoe UI","Microsoft YaHei","PingFang SC",sans-serif;line-height:1.82;font-size:16px}a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:3px}a:hover{text-decoration-thickness:2px}a:focus-visible,button:focus-visible{outline:3px solid #8d1735;outline-offset:3px}.container{width:min(1160px,calc(100% - 40px));margin-inline:auto}.site-header{background:var(--paper);border-bottom:1px solid var(--line)}.mast{min-height:82px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:inline-flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none;font-weight:700}.brand img{max-width:160px;max-height:42px;width:auto;height:auto;object-fit:contain}.brand-cn{font-size:24px}.brand-en{font-size:13px;letter-spacing:.22em}.mast-side{display:flex;gap:22px;align-items:center;color:var(--muted);font-size:14px}.mobile-menu-toggle{display:none}.primary-nav{border-top:1px solid var(--line);background:#fff}.desktop-nav{display:flex;align-items:stretch;gap:0}.desktop-nav a,.desktop-nav button,.mobile-quick a{min-height:48px;display:inline-flex;align-items:center;padding:0 16px;border:0;border-right:1px solid var(--line);background:none;color:var(--ink);text-decoration:none;font:inherit;white-space:nowrap}.desktop-nav a:first-child{border-left:1px solid var(--line)}.desktop-nav a[aria-current=page]{color:var(--accent);box-shadow:inset 0 -2px var(--accent)}.all-toggle{cursor:pointer}.all-sections{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;padding-block:24px 28px;border-top:1px solid var(--line)}.all-sections[hidden]{display:none}.all-sections h2{font-size:15px;margin:0 0 8px;color:var(--ink)}.all-sections section div{display:grid;gap:3px}.all-sections a{padding:6px 0;color:var(--body);text-decoration:none}.all-sections a[aria-current=page]{color:var(--accent)}.mobile-quick{display:none}.crumbs{margin-top:26px;color:var(--muted);font-size:14px;display:flex;flex-wrap:wrap;gap:4px}.crumbs a{color:inherit}.page-hero,.home-hero{max-width:760px;padding:42px 0 20px}.eyebrow{font-size:13px;letter-spacing:.12em;color:var(--accent);font-weight:700}.page-hero h1,.home-hero h1{font-size:clamp(28px,3vw,38px);line-height:1.25;color:var(--ink);margin:.3em 0}.lead{font-size:17px;color:var(--body);margin:0}.section{padding:48px 0;border-top:1px solid var(--line)}.section h2{font-size:clamp(21px,2.2vw,27px);line-height:1.35;color:var(--ink);margin:0 0 18px}.section h3{font-size:19px;color:var(--ink);margin:0 0 8px}.reading{max-width:740px}.reading p,.feature-copy p{margin:0 0 1em}.two-col{display:grid;grid-template-columns:minmax(0,3fr) minmax(0,2fr);gap:32px;align-items:start}.two-col.reverse{grid-template-columns:minmax(0,2fr) minmax(0,3fr)}.three-col{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.text-index{border-top:2px solid var(--ink);padding-top:16px}.soft{background:var(--soft);border-radius:10px;padding:22px}.image-stage{display:flex;justify-content:center;align-items:center;background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px}.image-stage img{display:block;max-width:100%;height:auto;width:auto;object-fit:contain;object-position:center}.banner-image img{max-height:320px}.main-image img{max-width:680px;max-height:400px}.split-image img{max-height:220px}.side-image img{max-height:170px}.app-image img{max-width:240px;max-height:360px}.icon-image img{max-width:44px;max-height:44px}.caption{max-width:760px;margin:10px auto 0;color:var(--muted);font-size:13px;text-align:center}.inline-links{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px}.inline-links a,.pill-link{display:inline-flex;align-items:center;min-height:44px;padding:7px 13px;border:1px solid var(--line);border-radius:8px;background:#fff;text-decoration:none}.topic-list{display:grid;grid-template-columns:1fr 1fr;gap:0 28px}.topic-list article{padding:18px 0;border-top:1px solid var(--line)}.steps{counter-reset:steps;display:grid;gap:18px}.step{border-top:1px solid var(--line);padding-top:15px}.step h3:before{counter-increment:steps;content:counter(steps,decimal-leading-zero) " ";color:var(--accent);font-size:13px;margin-right:6px}.quote-note{border-left:3px solid var(--accent);padding:2px 0 2px 18px;color:var(--muted)}.related{padding:36px 0 54px;border-top:1px solid var(--line)}.related h2{font-size:20px}.related-links{display:flex;flex-wrap:wrap;gap:10px}.related-links a{min-height:44px;display:inline-flex;align-items:center;padding:5px 12px;background:#fff;border:1px solid var(--line);border-radius:8px;text-decoration:none}.site-footer{background:var(--footer);color:#f7e8ec;margin-top:40px}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;padding:48px 0 34px}.footer-grid h2{font-size:15px;margin:0 0 10px;color:#fff}.footer-grid>div>a:not(.brand){display:block;color:#f5dbe2;padding:4px 0;text-decoration:none}.footer-brand-mark{color:#fff}.footer-brand p{max-width:280px;color:#e7cbd2}.footnote{border-top:1px solid rgba(255,255,255,.16);padding:16px 0 24px;color:#d9bbc4;font-size:13px}.faq-item{border-top:1px solid var(--line);padding:18px 0}.faq-item h2{font-size:19px;margin:0 0 7px}.compact-list{margin:0;padding-left:1.2em}.compact-list li{margin:.35em 0}@media(max-width:900px){.mast-side{display:none}.mobile-menu-toggle{display:inline-flex;align-items:center;min-height:44px;padding:0 13px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink)}.desktop-nav{display:none}.mobile-quick{display:flex}.mobile-quick a{flex:1;justify-content:center;border-left:1px solid var(--line)}.all-sections{grid-template-columns:1fr 1fr}.two-col,.two-col.reverse,.three-col{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.topic-list{grid-template-columns:1fr}.section{padding:38px 0}}@media(max-width:640px){body{font-size:15.5px}.container{width:calc(100% - 32px)}.mast{min-height:76px;gap:12px}.brand img{max-width:126px;max-height:38px}.brand-cn{font-size:21px}.brand-en{font-size:11px}.all-sections{grid-template-columns:1fr;padding-block:18px}.page-hero,.home-hero{padding:30px 0 16px}.section{padding:30px 0}.soft{padding:18px}.banner-image img{max-height:220px}.main-image img{max-height:300px}.split-image img{max-height:200px}.app-image img{max-width:200px}.footer-grid{grid-template-columns:1fr;padding:36px 0 28px;gap:24px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}