:root{--green:#2F7D5B;--pink:#D96C8A;--ink:#1F2A26;--bg:#F7F8F5;--soft:#EEF3EF;--text:#28312D;--muted:#6B756F;--orange:#E58A3A;--line:#DDE6E0;--white:#fff;--radius:18px;--shadow:0 16px 38px rgba(31,42,38,.08);--max:1220px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.72}img{display:block;max-width:100%;height:auto}a{color:inherit;text-decoration:none}button,input{font:inherit}.skip-link{position:fixed;left:14px;top:-80px;z-index:100;background:var(--ink);color:#fff;padding:10px 14px;border-radius:8px}.skip-link:focus{top:14px}.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}.site-head{position:sticky;top:0;z-index:40;background:rgba(247,248,245,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(47,125,91,.13)}.head-inner{max-width:var(--max);margin:auto;min-height:76px;padding:10px 20px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);font-size:1.14rem}.brand img{width:42px;height:42px;object-fit:contain}.main-nav{display:flex;gap:8px;align-items:center}.main-nav a{padding:9px 12px;border-radius:999px;color:#4b5a53;font-weight:650;font-size:.94rem}.main-nav a:hover,.main-nav a.active{background:var(--soft);color:var(--green)}.mini-search{display:flex;border:1px solid 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0}.button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 17px;border-radius:12px;font-weight:800}.button.primary{background:var(--ink);color:#fff}.button.ghost{border:1px solid #bfd0c5;background:#fff}.button.soft{background:var(--orange);color:#fff}.lead-media{margin:0;position:relative}.lead-media img{width:100%;aspect-ratio:1.38;object-fit:cover;border-radius:26px;box-shadow:var(--shadow)}.lead-media figcaption{position:absolute;left:18px;bottom:18px;background:rgba(31,42,38,.9);color:#fff;padding:9px 12px;border-radius:10px;font-size:.88rem}.topic-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}.topic-chips span{background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 11px;font-size:.84rem;font-weight:700}.topic-chips small{color:var(--muted);font-weight:600;margin-left:6px}.section-wrap{padding:48px 0}.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;margin-bottom:22px;border-bottom:1px solid var(--line);padding-bottom:20px}.section-head h2,.split-band h2,.feature-note h2,.utility-strip h2,.related-callout h2,.evidence-ladder h2,.rules-panel h2,.app-note h2,.article-side h2{margin:0;color:var(--ink);font-size:clamp(1.7rem,3vw,2.6rem);line-height:1.17;letter-spacing:-.025em}.section-head>p{max-width:460px;margin:0;color:var(--muted)}.story-list{display:grid;grid-template-columns:1fr 1fr;gap:0 34px}.story-row{padding:24px 0;border-bottom:1px solid var(--line)}.story-row h3{font-size:1.2rem;line-height:1.35;margin:7px 0 9px;color:var(--ink)}.story-row h3 a:hover{color:var(--green)}.story-row p{margin:0 0 10px;color:#54615a}.story-meta{display:flex;justify-content:space-between;gap:16px;color:var(--muted);font-size:.78rem}.story-meta span{color:var(--pink);font-weight:800}.text-link{color:var(--green);font-weight:800;font-size:.9rem}.text-link:hover{text-decoration:underline}.text-link.strong{font-size:1rem}.split-band{margin:44px 0;background:var(--ink);color:#eef6f1;border-radius:24px;padding:34px;display:grid;grid-template-columns:.8fr 1.2fr;gap:38px}.split-band .eyebrow{color:#9fd8bb}.split-band h2{color:#fff}.split-band .band-copy p{color:#c9d4ce}.split-band .text-link{color:#ffbf7d}.compact-list .story-row{border-color:rgba(255,255,255,.13)}.compact-list .story-row p{color:#cbd4cf}.compact-list .story-row h3{color:#fff}.two-col-feature{display:grid;grid-template-columns:1fr 1fr;gap:28px}.feature-note{background:#fff;border:1px solid var(--line);padding:18px;border-radius:22px}.feature-note img{aspect-ratio:1.52;object-fit:cover;border-radius:15px;margin-bottom:22px}.feature-note p{color:var(--muted)}.utility-strip{margin-top:46px;background:var(--soft);border-radius:22px;padding:28px 30px;display:flex;justify-content:space-between;align-items:center;gap:26px}.utility-strip p{margin:6px 0 0;color:var(--muted);max-width:740px}.inner-page{padding-top:54px}.topic-hero,.community-intro,.app-hero{display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:center;margin-bottom:48px}.topic-hero h1,.community-intro h1,.app-hero h1{font-size:clamp(2.35rem,4.5vw,4.2rem)}.topic-hero p,.community-intro p,.app-hero p{font-size:1.08rem;color:var(--muted)}.topic-hero img,.community-intro img,.app-hero img{border-radius:24px;aspect-ratio:1.45;object-fit:cover}.dark-accent{background:var(--ink);color:#edf4f0;padding:30px;border-radius:26px}.dark-accent h1{color:#fff}.dark-accent p{color:#cbd4cf}.dark-accent .eyebrow{color:#f0aebf}.method-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:30px 0 18px}.method-grid article,.mobile-points article{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px}.method-grid strong{font-size:1.08rem;color:var(--ink)}.method-grid p,.mobile-points p{margin:8px 0 0;color:var(--muted)}.related-callout{margin-top:40px;padding:28px;border-left:4px solid var(--orange);background:#fff;border-radius:0 18px 18px 0}.related-callout p{color:var(--muted)}.evidence-ladder{background:#fff;padding:28px;border-radius:22px;border:1px solid var(--line);margin-bottom:24px}.evidence-ladder ol{list-style:none;margin:22px 0 0;padding:0;display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.evidence-ladder li{padding:17px;background:var(--soft);border-radius:14px;display:flex;flex-direction:column}.evidence-ladder span{color:var(--muted);font-size:.93rem;margin-top:5px}.cross-links{display:flex;gap:12px;margin-top:32px}.cross-links a{padding:10px 14px;border:1px solid var(--line);background:#fff;border-radius:12px;font-weight:800;color:var(--green)}.community-board{padding:34px;background:#fff;border:1px solid var(--line);border-radius:22px}.board-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.board-grid article{padding:18px;background:var(--soft);border-radius:14px}.board-grid h3{margin:0 0 6px;color:var(--ink)}.board-grid p{margin:0;color:var(--muted)}.rules-panel{padding:28px;background:#fff0f4;border-radius:20px;border:1px solid #f2ccd7}.rules-panel ul{margin-bottom:0}.mobile-points{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.mobile-points h2{font-size:1.15rem;margin:0;color:var(--ink)}.app-note{margin-top:44px;display:grid;grid-template-columns:.9fr 1.1fr;gap:34px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:22px;padding:20px}.app-note img{border-radius:15px}.simple-head{max-width:850px}.simple-head h1{font-size:clamp(2.2rem,4vw,3.8rem)}.simple-head p{color:var(--muted)}.search-large{margin:32px 0;padding:20px;background:#fff;border:1px solid var(--line);border-radius:18px}.search-large label{font-weight:800;display:block;margin-bottom:8px}.search-large>div{display:flex;gap:8px}.search-large input{flex:1;min-width:0;border:1px solid #cdd9d1;border-radius:10px;padding:11px 12px;outline:none}.search-large input:focus{border-color:var(--green);box-shadow:0 0 0 3px rgba(47,125,91,.12)}.search-large button{border:0;background:var(--green);color:#fff;border-radius:10px;padding:10px 18px;font-weight:800}.empty-state{padding:30px;background:#fff;border:1px dashed #c4d0c9;border-radius:18px}.article-page{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:56px;align-items:start}.article-main{max-width:820px}.article-main header{padding:30px 0;border-bottom:1px solid var(--line)}.crumb{display:inline-block;color:var(--green);font-weight:800;margin-bottom:18px}.article-main h1{font-size:clamp(2.25rem,4.8vw,4.1rem);line-height:1.08;letter-spacing:-.04em;margin:4px 0 20px;color:var(--ink)}.article-dek{font-size:1.12rem;color:#536159}.article-main time{color:var(--muted);font-size:.88rem}.article-body{font-size:1.05rem}.article-body p{margin:24px 0}.article-body h2{font-size:1.7rem;margin:34px 0 10px;color:var(--ink)}.article-tip{padding:18px 20px;background:var(--soft);border-radius:14px;border-left:4px solid var(--orange)}.article-tip p{margin:7px 0 0}.article-side{position:sticky;top:100px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px}.article-side h2{font-size:1.25rem}.article-side a{display:block;padding:14px 0;border-bottom:1px solid var(--line)}.article-side a:last-child{border-bottom:0}.article-side span{display:block;color:var(--pink);font-size:.76rem;font-weight:800}.article-side strong{display:block;margin-top:3px;line-height:1.35}.error-page{min-height:60vh;display:grid;place-items:center;text-align:center}.error-page>div{max-width:720px}.error-page h1{font-size:clamp(2.3rem,4vw,4rem)}.site-footer{background:var(--ink);color:#dbe6df;padding:44px 20px 24px}.footer-grid{max-width:var(--max);margin:auto;display:grid;grid-template-columns:1.5fr .75fr .75fr;gap:44px}.footer-grid strong{color:#fff;font-size:1.05rem}.footer-grid p{max-width:620px;color:#bfcac4}.footer-grid a{display:block;margin-top:8px;color:#d9e5de}.copyright{max-width:var(--max);margin:32px auto 0;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);font-size:.84rem;color:#9fb0a7}
@media(max-width:980px){.head-inner{grid-template-columns:auto auto 1fr;gap:12px}.menu-toggle{display:inline-flex;justify-self:start;border:1px solid var(--line);background:#fff;border-radius:10px;padding:8px 11px}.main-nav{position:absolute;left:20px;right:20px;top:70px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:10px;box-shadow:var(--shadow);display:none;flex-direction:column;align-items:stretch}.main-nav.open{display:flex}.main-nav a{border-radius:10px}.mini-search{justify-self:end}.lead-grid,.topic-hero,.community-intro,.app-hero{grid-template-columns:1fr}.lead-media{order:-1}.story-list{grid-template-columns:1fr}.split-band{grid-template-columns:1fr}.article-page{grid-template-columns:1fr}.article-side{position:static}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:1/-1}}
@media(max-width:720px){.head-inner{grid-template-columns:1fr auto}.brand{grid-column:1}.menu-toggle{grid-column:2}.mini-search{grid-column:1/-1;width:100%}.mini-search input{width:100%}.page-shell{padding:28px 16px 52px}.lead-grid{padding-top:14px;gap:24px}.lead-copy h1,.topic-hero h1,.community-intro h1,.app-hero h1{font-size:2.45rem}.lead-media figcaption{position:static;background:transparent;color:var(--muted);padding:8px 2px}.section-head{align-items:flex-start;flex-direction:column;gap:8px}.split-band{padding:22px;margin-inline:-4px}.two-col-feature,.method-grid,.mobile-points,.board-grid,.evidence-ladder ol,.app-note{grid-template-columns:1fr}.utility-strip{align-items:flex-start;flex-direction:column}.community-board{padding:22px}.article-main h1{font-size:2.45rem}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}.search-large>div{flex-direction:column}.dark-accent{padding:22px}.cross-links{flex-direction:column}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}
:focus-visible{outline:3px solid rgba(229,138,58,.55);outline-offset:3px}
.guide-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.guide-grid article{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px}.guide-grid h3{margin:0 0 8px;color:var(--ink);font-size:1.08rem}.guide-grid p{color:var(--muted);margin:0 0 12px}.guide-grid ol{margin:0;padding-left:20px;color:#4d5b54}.guide-grid li+li{margin-top:5px}@media(max-width:720px){.guide-grid{grid-template-columns:1fr}}