:root {
  --green:#2F7D5B; --green-dark:#1F2A26; --berry:#D96C8A; --orange:#E58A3A;
  --paper:#F7F8F5; --soft:#EEF3EF; --text:#28312D; --muted:#6B756F; --line:#D9E2DC;
  --white:#FFFFFF; --shadow:0 18px 45px rgba(31,42,38,.08); --radius:22px; --radius-sm:14px;
  --max:1180px; --read:760px;
}
*{box-sizing:border-box} html{scroll-behavior:smooth} body{margin:0;background:var(--paper);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.72;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}a:hover{color:var(--green)}img{display:block;max-width:100%;height:auto;border-radius:18px}button,input{font:inherit}.skip-link{position:absolute;left:-9999px;top:0}.skip-link:focus{left:16px;top:16px;z-index:99;background:var(--white);padding:10px 14px;border-radius:10px;box-shadow:var(--shadow)}
.site-header{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,.12)}.header-inner{max-width:var(--max);margin:auto;min-height:76px;padding:10px 22px;display:flex;align-items:center;gap:24px}.brand{display:flex;align-items:center;gap:12px;margin-right:auto}.brand img{width:44px;height:44px;object-fit:cover;border-radius:12px}.brand span{display:grid;line-height:1.15}.brand strong{font-size:20px;color:var(--green-dark)}.brand small{font-size:12px;color:var(--muted);margin-top:5px}.site-nav{display:flex;align-items:center;gap:6px}.site-nav a{padding:10px 13px;border-radius:12px;color:#415049;font-size:15px;font-weight:650}.site-nav a:hover,.site-nav a.is-active{background:var(--soft);color:var(--green)}.nav-toggle{display:none;border:1px solid var(--line);background:var(--white);padding:8px 12px;border-radius:10px;color:var(--green-dark)}
main{max-width:var(--max);margin:auto;padding:0 22px}.lead-zone{display:grid;grid-template-columns:minmax(0,1.03fr) minmax(380px,.97fr);gap:56px;align-items:center;padding:64px 0 48px}.eyebrow{margin:0 0 10px;text-transform:uppercase;letter-spacing:.08em;font-size:13px;font-weight:800;color:var(--green)}.lead-copy h1,.page-head h1{font-size:clamp(38px,5vw,66px);line-height:1.08;letter-spacing:-.035em;margin:0 0 22px;color:var(--green-dark)}.lead-text,.page-head p{font-size:18px;color:#53605A;max-width:720px}.lead-actions{display:flex;gap:12px;flex-wrap:wrap;margin:28px 0}.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:11px 18px;border-radius:13px;font-weight:750;border:1px solid transparent}.button.primary{background:var(--green);color:white}.button.primary:hover{background:#26694D;color:white}.button.subtle{background:var(--white);border-color:var(--line);color:var(--green-dark)}.keyword-strip{display:flex;gap:8px;flex-wrap:wrap;margin-top:28px}.keyword-strip span,.story-meta span{font-size:12px;background:var(--soft);color:#4A6658;border-radius:999px;padding:6px 9px}.lead-visual{margin:0;position:relative}.lead-visual img{width:100%;aspect-ratio:1.25/1;object-fit:cover;box-shadow:var(--shadow)}.lead-visual figcaption{position:absolute;left:20px;bottom:20px;background:rgba(31,42,38,.9);color:white;padding:10px 14px;border-radius:12px;font-size:13px}
.content-band{padding:64px 0}.two-column{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:48px;align-items:start}.section-heading{display:flex;justify-content:space-between;gap:24px;align-items:end;margin-bottom:26px}.section-heading h2,.topic-intro h2,.stream-panel h2,.callout h2,.utility-zone h2,.article-body h2,.article-related h2{margin:0;color:var(--green-dark);font-size:clamp(26px,3vw,38px);line-height:1.22;letter-spacing:-.02em}.section-heading>p{max-width:430px;margin:0;color:var(--muted)}.story-list{border-top:1px solid var(--line)}.story-row{padding:24px 0 22px;border-bottom:1px solid var(--line)}.story-row h3{margin:9px 0 8px;font-size:22px;line-height:1.35;color:var(--green-dark)}.story-row p{margin:0 0 8px;color:#55635C}.story-meta{display:flex;gap:7px;flex-wrap:wrap}.text-link{display:inline-flex;margin-top:6px;color:var(--green);font-weight:750;font-size:14px}.text-link:after{content:' →';margin-left:4px}.text-link.strong{font-size:15px}.compact .story-row{padding:17px 0}.compact .story-row h3{font-size:18px}.compact .story-row p{font-size:14px}.rail{display:grid;gap:18px;position:sticky;top:98px}.rail-card{background:var(--white);padding:24px;border-radius:var(--radius);border:1px solid var(--line)}.rail-card.accent{background:var(--green-dark);color:white;border:none}.rail-card.accent .eyebrow{color:#9CD7BB}.rail-card.accent h2{font-size:27px;line-height:1.2;margin:0 0 18px}.rail-card ol{margin:0;padding-left:20px}.rail-card li+li{margin-top:10px}.image-card{padding:14px}.image-card p{margin:14px 8px 8px;color:var(--muted);font-size:14px}
.topic-split{margin:50px 0;padding:48px;border-radius:28px;background:var(--soft);display:grid;grid-template-columns:.86fr 1.14fr;gap:46px}.topic-intro p:not(.eyebrow){color:#52615A}.topic-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.topic-card{background:var(--white);border:1px solid rgba(47,125,91,.12);border-radius:18px;padding:20px}.topic-card span{font-size:12px;color:var(--berry);font-weight:800}.topic-card h3{font-size:18px;line-height:1.35;margin:8px 0}.topic-card p{font-size:14px;color:var(--muted);margin:0}.secondary-streams{display:grid;grid-template-columns:1fr 1fr;gap:22px;padding:28px 0 72px}.stream-panel{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:16px 16px 24px}.stream-panel img{width:100%;aspect-ratio:1.55/1;object-fit:cover}.stream-panel .eyebrow{margin-top:20px}.stream-panel h2{font-size:27px}.stream-panel p:not(.eyebrow){color:var(--muted)}.stream-panel a{color:var(--green);font-weight:800}.utility-zone{display:flex;justify-content:space-between;align-items:center;gap:28px;margin-bottom:70px;padding:30px 34px;border-radius:22px;background:#F2ECE4;border:1px solid #E8DDD0}.utility-zone h2{font-size:28px}.utility-zone p{margin:8px 0 0;color:var(--muted)}
.page-shell{padding-bottom:70px}.page-head{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;padding:62px 0 42px}.page-head img{width:100%;aspect-ratio:1.45/1;object-fit:cover}.split-head{border-bottom:1px solid var(--line)}.dark-head{margin:28px -22px 0;padding:54px 44px;background:var(--green-dark);border-radius:28px;color:white}.dark-head h1,.dark-head p{color:white}.dark-head .eyebrow{color:#9CD7BB}.community-head{background:linear-gradient(135deg,#EEF3EF 0%,#F7F8F5 65%);margin:28px -22px 0;padding:48px 44px;border-radius:28px}.app-head{background:#F2ECE4;margin:28px -22px 0;padding:48px 44px;border-radius:28px}.evidence-grid,.myth-facts,.principle-grid,.app-note-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;padding:50px 0}.evidence-grid article,.myth-facts>div,.principle-grid article,.app-note-grid article{background:var(--white);border:1px solid var(--line);padding:22px;border-radius:18px}.evidence-grid span{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--soft);color:var(--green);font-weight:850}.evidence-grid h2,.myth-facts h2,.principle-grid h3,.app-note-grid h2{font-size:20px;line-height:1.3;margin:16px 0 8px;color:var(--green-dark)}.evidence-grid p,.myth-facts p,.principle-grid p,.app-note-grid p{font-size:14px;color:var(--muted);margin:0}.myth-facts{grid-template-columns:repeat(3,1fr)}.myth-facts>div{background:#FBF7F8;border-color:#EBDDE2}.callout{display:flex;justify-content:space-between;align-items:center;gap:30px;background:var(--green-dark);color:white;border-radius:22px;padding:30px 34px}.callout h2{font-size:26px;color:white}.callout p{margin:7px 0 0;color:#CFDAD5}.callout a{background:white;color:var(--green-dark);font-weight:800;padding:11px 16px;border-radius:12px;white-space:nowrap}.callout.pale{background:var(--soft);color:var(--text)}.callout.pale h2{color:var(--green-dark)}.callout.pale p{color:var(--muted)}.callout.pale a{background:var(--green);color:white}
.discussion-board{display:grid;grid-template-columns:1fr 1fr;gap:16px;padding:50px 0}.discussion-item{padding:24px;background:var(--white);border:1px solid var(--line);border-radius:18px}.discussion-item span{font-size:12px;font-weight:800;color:var(--berry)}.discussion-item h2{font-size:21px;line-height:1.35;margin:8px 0}.discussion-item p{margin:0;color:var(--muted)}.community-principles{padding:10px 0 40px}.app-note-grid{grid-template-columns:repeat(2,1fr)}.mobile-preview{display:grid;grid-template-columns:380px 1fr;gap:54px;align-items:center;background:var(--soft);border-radius:26px;padding:34px;margin:12px 0 30px}.mobile-preview img{max-height:520px;width:100%;object-fit:cover}.mobile-preview h2{font-size:34px;line-height:1.2;color:var(--green-dark)}.mobile-preview p:not(.eyebrow){color:var(--muted)}
.article-shell{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:50px;padding-top:26px;padding-bottom:70px}.breadcrumb{grid-column:1/-1;display:flex;gap:9px;color:var(--muted);font-size:14px}.article-body{max-width:var(--read)}.article-body header h1{font-size:clamp(36px,5vw,58px);line-height:1.1;letter-spacing:-.03em;color:var(--green-dark);margin:14px 0 18px}.article-deck{font-size:19px;color:#5A665F}.article-body figure{margin:30px 0}.article-body figure img{width:100%;aspect-ratio:1.65/1;object-fit:cover}.article-body section{padding:18px 0}.article-body h2{font-size:28px;margin-bottom:12px}.article-body section p{font-size:17px;line-height:1.85;color:#3E4B45}.article-related{position:sticky;top:98px;align-self:start;padding:22px;background:var(--white);border:1px solid var(--line);border-radius:20px}.article-related h2{font-size:24px}.not-found{min-height:65vh;display:grid;place-content:center;max-width:760px;text-align:center;padding-top:60px;padding-bottom:60px}.not-found h1{font-size:52px;margin:0;color:var(--green-dark)}.not-found p{color:var(--muted)}.not-found .lead-actions{justify-content:center}
.site-footer{background:var(--green-dark);color:white}.footer-inner{max-width:var(--max);margin:auto;padding:42px 22px;display:grid;grid-template-columns:1fr 1fr;gap:24px}.footer-inner strong{font-size:22px}.footer-inner p{color:#C9D6D0;max-width:600px}.footer-links{display:flex;gap:12px 18px;flex-wrap:wrap;justify-content:flex-end}.footer-links a{color:#EAF1ED}.footer-note{grid-column:1/-1;border-top:1px solid rgba(255,255,255,.12);padding-top:18px;max-width:none!important;font-size:13px}
:focus-visible{outline:3px solid rgba(229,138,58,.55);outline-offset:3px}
@media (max-width:980px){.lead-zone,.page-head,.topic-split{grid-template-columns:1fr}.lead-zone{gap:28px}.lead-visual{max-width:760px}.two-column{grid-template-columns:1fr}.rail{position:static;grid-template-columns:1fr 1fr}.evidence-grid{grid-template-columns:1fr 1fr}.article-shell{grid-template-columns:1fr}.article-related{position:static}.mobile-preview{grid-template-columns:300px 1fr}.dark-head,.community-head,.app-head{margin-left:0;margin-right:0}.site-nav{position:absolute;left:22px;right:22px;top:68px;background:var(--white);border:1px solid var(--line);border-radius:16px;padding:10px;box-shadow:var(--shadow);display:none;flex-direction:column;align-items:stretch}.site-nav.is-open{display:flex}.nav-toggle{display:block}.site-nav a{width:100%}}
@media (max-width:720px){main{padding-left:16px;padding-right:16px}.header-inner{padding-left:16px;padding-right:16px}.brand small{display:none}.lead-zone{padding-top:38px}.lead-copy h1,.page-head h1{font-size:38px}.lead-text,.page-head p{font-size:16px}.section-heading{display:block}.section-heading>p{margin-top:8px}.topic-split{padding:26px;margin-left:0;margin-right:0}.topic-grid,.secondary-streams,.discussion-board,.myth-facts,.principle-grid,.app-note-grid{grid-template-columns:1fr}.rail{grid-template-columns:1fr}.evidence-grid{grid-template-columns:1fr}.page-head{padding-top:38px}.dark-head,.community-head,.app-head{padding:30px 22px}.callout,.utility-zone{display:block}.callout a,.utility-zone .button{display:inline-flex;margin-top:18px}.mobile-preview{grid-template-columns:1fr;padding:24px}.mobile-preview img{max-height:360px}.article-body header h1{font-size:38px}.footer-inner{grid-template-columns:1fr}.footer-links{justify-content:flex-start}.secondary-streams{padding-bottom:44px}}
@media (max-width:460px){.lead-actions{display:grid}.button{width:100%}.keyword-strip{gap:6px}.topic-card{padding:16px}.story-row h3{font-size:20px}.article-related{padding:16px}.site-nav{left:12px;right:12px}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}}

.source-reference{display:grid;grid-template-columns:1fr 1fr;gap:16px}.source-card{background:var(--white);border:1px solid var(--line);border-radius:18px;padding:22px}.source-top{display:flex;align-items:center;justify-content:space-between;gap:14px}.source-top h2{font-size:21px;line-height:1.25;margin:0;color:var(--green-dark)}.source-top span{font-size:12px;font-weight:800;color:var(--green);background:var(--soft);padding:5px 9px;border-radius:999px;white-space:nowrap}.source-card>p{color:#52615A;margin:14px 0}.caution{font-size:14px;color:var(--muted);padding-top:14px;border-top:1px dashed var(--line)}.caution strong{color:var(--green-dark);margin-right:4px}@media(max-width:720px){.source-reference{grid-template-columns:1fr}.source-top{align-items:flex-start;flex-direction:column}.source-top span{white-space:normal}}

.faq-list{padding:20px 0 70px}.faq-item{display:grid;grid-template-columns:64px 1fr;gap:20px;padding:28px 0;border-top:1px solid var(--line)}.faq-item:last-child{border-bottom:1px solid var(--line)}.faq-number{font-size:13px;font-weight:850;color:var(--berry);padding-top:5px}.faq-item h2{margin:0 0 10px;font-size:22px;line-height:1.35;color:var(--green-dark)}.faq-item p{margin:0;color:#52615A;max-width:850px}@media(max-width:560px){.faq-item{grid-template-columns:1fr;gap:6px}.faq-number{padding-top:0}}