:root {
  --paper:#FAF7F2; --paper-2:#F1EAE2; --ink:#332E2B; --muted:#766C66; --deep:#2B2523;
  --brand:#C85C3A; --amber:#E6B85C; --accent:#D94A32; --line:#DCCFC2; --white:#fffdf9;
  --shadow:0 18px 42px rgba(65,48,38,.09); --radius:22px; --radius-sm:13px; --max:1180px;
}
*{box-sizing:border-box} html{scroll-behavior:smooth} body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.72;-webkit-font-smoothing:antialiased} img{max-width:100%;height:auto;display:block} a{color:inherit;text-decoration:none} button,input{font:inherit} .container{width:min(var(--max),calc(100% - 48px));margin-inline:auto}.narrow{max-width:820px}.site-main{min-height:65vh}.section-space{padding-block:86px}.section-tinted{background:var(--paper-2)}.eyebrow{margin:0 0 12px;color:var(--brand);font-size:.82rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.lead{font-size:1.14rem;color:#514842;max-width:760px}.skip-link{position:absolute;left:-9999px;top:12px;background:var(--deep);color:#fff;padding:10px 14px;z-index:99}.skip-link:focus{left:12px}.site-header{position:sticky;top:0;z-index:50;background:rgba(250,247,242,.94);backdrop-filter:blur(12px);border-bottom:1px solid rgba(220,207,194,.75)}.header-inner{min-height:76px;display:flex;align-items:center;gap:24px}.brand{display:flex;align-items:center;gap:11px;margin-right:auto}.brand img{width:44px;height:44px;object-fit:contain}.brand span{display:grid;line-height:1.15}.brand strong{font-size:1.06rem}.brand small{font-size:.72rem;color:var(--muted);margin-top:4px}.primary-nav{display:flex;align-items:center;gap:5px}.primary-nav a,.search-open,.menu-toggle{border:0;background:transparent;padding:10px 11px;border-radius:10px;color:#4b423d}.primary-nav a:hover,.primary-nav a:focus-visible,.search-open:hover,.menu-toggle:hover{background:#eee2d8;color:var(--deep)}.search-open{border:1px solid var(--line);cursor:pointer}.menu-toggle{display:none;cursor:pointer}.search-modal[hidden]{display:none !important}.search-modal{position:fixed;inset:0;z-index:90;display:grid;place-items:start center;padding-top:12vh}.search-backdrop{position:absolute;inset:0;background:rgba(43,37,35,.58)}.search-panel{position:relative;width:min(640px,calc(100% - 32px));background:var(--white);border-radius:26px;padding:34px;box-shadow:0 30px 90px rgba(0,0,0,.22)}.search-panel h2{margin:0 0 8px;font-size:1.7rem}.search-panel p{color:var(--muted)}.search-close{position:absolute;right:18px;top:16px;border:0;background:transparent;font-size:2rem;cursor:pointer;color:var(--muted)}.search-form label{display:block;font-weight:700;margin-bottom:8px}.search-form>div{display:flex;gap:10px}.search-form input{min-width:0;flex:1;border:1px solid var(--line);background:#fff;padding:13px 14px;border-radius:12px;outline:none}.search-form input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(200,92,58,.12)}.search-form button{border:0;background:var(--brand);color:#fff;border-radius:12px;padding:0 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h1{font-size:clamp(2.45rem,5vw,4.65rem);line-height:1.08;letter-spacing:-.035em;margin:0 0 24px;max-width:760px}.intro-visual{margin:0}.intro-visual img{width:100%;aspect-ratio:1.2/1;object-fit:cover;border-radius:30px;box-shadow:var(--shadow)}.intro-visual figcaption{font-size:.78rem;color:var(--muted);margin-top:10px;text-align:right}.access-line{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:30px;padding-top:22px;border-top:1px solid var(--line)}.access-line span{font-size:.78rem;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}.access-line strong{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.access-line a{margin-left:auto;color:var(--brand);font-weight:800}.route-strip{border-block:1px solid var(--line);background:#fffaf5}.route-grid{display:grid;grid-template-columns:repeat(3,1fr)}.route-grid>div{padding:28px 30px;border-right:1px solid var(--line)}.route-grid>div:last-child{border-right:0}.route-grid 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a:nth-child(even){padding-left:28px}.source-links span{font-size:.76rem;color:#e9b65a}.source-links strong{font-size:1.05rem}.source-links small{color:#bdb3ad;line-height:1.6}.mobile-row{display:grid;grid-template-columns:.9fr 1.1fr;gap:66px;align-items:center}.mobile-row h2{font-size:2rem;line-height:1.25;margin:0 0 14px}.mobile-row figure{margin:0}.mobile-row img{border-radius:28px;max-height:430px;width:100%;object-fit:cover}.guide-grid{display:grid;grid-template-columns:.7fr 1.3fr;gap:60px}.guide-cards{display:grid;grid-template-columns:1fr 1fr;gap:14px}.guide-cards a{padding:20px;background:#fffaf5;border:1px solid var(--line);border-radius:16px;display:grid;gap:8px}.guide-cards span{color:var(--muted);font-size:.9rem}.faq-teaser{display:grid;grid-template-columns:.85fr 1.15fr;gap:60px;align-items:center;border-top:1px solid var(--line)}.faq-teaser img{border-radius:22px;aspect-ratio:1.45/1;object-fit:cover}.faq-teaser h2{font-size:2rem;line-height:1.25;margin:0 0 12px}.closing-index{padding-block:70px}.closing-columns{display:grid;grid-template-columns:1fr 1fr;gap:70px}.closing-columns h2{font-size:2rem;line-height:1.25;margin:0 0 12px}.mini-links{display:grid;border-top:1px solid var(--line)}.mini-links a{padding:15px 0;border-bottom:1px solid var(--line);font-weight:700}.breadcrumbs{display:flex;gap:9px;align-items:center;font-size:.82rem;color:var(--muted);padding-top:24px}.breadcrumbs a:hover{color:var(--brand)}.community-hero,.app-hero,.bulletin-hero,.guide-hero,.info-hero,.faq-head{display:grid;grid-template-columns:1.08fr .92fr;gap:58px;align-items:center;padding-block:52px 56px}.community-hero h1,.app-hero h1,.bulletin-hero h1,.guide-hero h1,.info-hero h1,.faq-head h1,.index-head h1,.search-page-head h1{font-size:clamp(2.2rem,4.4vw,4rem);line-height:1.1;letter-spacing:-.03em;margin:0 0 20px}.community-hero img,.app-hero img,.bulletin-hero img,.guide-hero img,.info-hero img,.faq-head 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ol{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line)}.steps li{padding:24px 20px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);display:grid;gap:8px}.steps li:first-child{border-left:1px solid var(--line)}.steps strong{font-size:1rem}.steps span{font-size:.9rem;color:var(--muted)}.compact-articles{display:grid;grid-template-columns:.7fr 1.3fr;gap:70px;padding-block:84px}.compact-articles h2{font-size:2rem;line-height:1.25;margin:0 0 12px}.compact-list{border-top:1px solid var(--line)}.compact-list a{display:grid;grid-template-columns:.9fr 1.1fr;gap:20px;padding:17px 0;border-bottom:1px solid var(--line)}.compact-list span{font-size:.88rem;color:var(--muted)}.mobile-note{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}.mobile-note img{border-radius:22px;aspect-ratio:1.4/1;object-fit:cover}.privacy-index 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p{font-size:.93rem;color:var(--muted);margin:6px 0 0}.article-side{display:grid;align-content:start;gap:16px}.side-box{border:1px solid var(--line);background:#fffaf5;border-radius:16px;padding:20px}.side-box>span{font-size:.75rem;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}.side-box>strong{display:block;margin:4px 0 8px}.side-box>p{font-size:.88rem;color:var(--muted)}.side-box>a:not(.side-link){color:var(--brand);font-weight:800;font-size:.88rem}.side-link{display:block;padding:11px 0;border-top:1px solid var(--line);font-size:.9rem;font-weight:700}.related-block{padding-block:72px}.related-block>div:first-child{margin-bottom:26px}.related-block h2{font-size:2rem;margin:0}.related-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.related-grid a{background:#fffaf5;border:1px solid var(--line);border-radius:15px;padding:18px;display:grid;gap:8px}.related-grid span{font-size:.75rem;color:var(--brand);font-weight:800}.related-grid 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0;position:relative;list-style:none}.faq-list summary:after{content:'+';position:absolute;right:8px;font-size:1.4rem;color:var(--brand)}.faq-list details[open] summary:after{content:'−'}.faq-list details div{padding:0 50px 20px 0;color:var(--muted)}.help-links{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;border-top:1px solid var(--line)}.help-links a{display:grid;gap:7px;padding:22px;border-bottom:1px solid var(--line)}.help-links span{color:var(--muted);font-size:.9rem}.prose-sections{display:grid;grid-template-columns:1fr 1fr;gap:20px}.prose-sections section,.contact-note{padding:28px;border:1px solid var(--line);border-radius:18px;background:#fffaf5}.prose-sections h2{font-size:1.28rem;margin:0 0 10px}.prose-sections p{margin:0;color:var(--muted)}.contact-note{grid-column:1/-1;background:var(--paper-2)}.contact-note p{margin-top:7px}.search-results{padding-top:24px;max-width:900px}.search-hit{padding:24px 0;border-top:1px solid 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@media (max-width:768px){.container{width:min(100% - 32px,var(--max))}.section-space{padding-block:62px}.menu-toggle{display:inline-flex}.primary-nav{position:absolute;left:16px;right:16px;top:70px;background:var(--white);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:10px;display:none;flex-direction:column;align-items:stretch}.primary-nav.open{display:flex}.primary-nav a{padding:11px 12px}.search-open{margin-left:0}.brand small{display:none}.home-intro,.community-hero,.app-hero,.bulletin-hero,.guide-hero,.info-hero,.faq-head,.visual-note,.mobile-row,.faq-teaser,.reading-note,.status-note,.mobile-note,.search-callout{grid-template-columns:1fr}.home-intro{padding-top:48px}.intro-visual{order:-1}.intro-visual img{max-height:340px}.route-grid{grid-template-columns:1fr}.route-grid>div{border-right:0;border-bottom:1px solid var(--line);padding-inline:0}.text-index{grid-template-columns:1fr}.text-index a:nth-child(odd){border-right:0}.split-editorial{grid-template-columns:1fr;padding-block:64px}.sticky-heading{position:static}.source-links{grid-template-columns:1fr}.source-links a:nth-child(odd){border-right:0;padding-right:0}.source-links a:nth-child(even){padding-left:0}.guide-grid{grid-template-columns:1fr}.closing-columns,.two-streams,.compact-articles{grid-template-columns:1fr;gap:36px}.guide-cards{grid-template-columns:1fr}.privacy-index .privacy-list{grid-template-columns:1fr}.privacy-list a:nth-child(odd){border-right:0}.index-list article{grid-template-columns:1fr;gap:10px}.article-layout{grid-template-columns:1fr;gap:35px}.article-side{grid-row:auto}.related-grid{grid-template-columns:1fr}.path-map{grid-template-columns:1fr}.path-map>div{border-right:1px solid var(--line);border-bottom:0}.path-map>div:last-child{border-bottom:1px solid var(--line)}.guide-article-list>a{grid-template-columns:1fr;gap:8px}.prose-sections{grid-template-columns:1fr}.contact-note{grid-column:auto}.help-links{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:last-child{grid-column:auto}}
@media (max-width:600px){.container{width:min(100% - 24px,var(--max))}.header-inner{min-height:68px}.brand img{width:38px;height:38px}.search-open{font-size:.84rem;padding:8px}.home-intro h1{font-size:2.45rem}.home-intro{padding-block:40px}.section-space{padding-block:52px}.route-grid>div{padding-block:22px}.access-line a{margin-left:0;width:100%}.source-band{padding-block:58px}.steps ol{grid-template-columns:1fr}.steps li{border-left:1px solid var(--line)}.compact-list a{grid-template-columns:1fr;gap:6px}.dense-list article{grid-template-columns:44px 1fr}.community-hero,.app-hero,.bulletin-hero,.guide-hero,.info-hero,.faq-head{padding-block:38px}.community-hero h1,.app-hero h1,.bulletin-hero h1,.guide-hero h1,.info-hero h1,.faq-head h1,.index-head h1,.search-page-head h1{font-size:2.35rem}.article-head h1{font-size:2.45rem}.article-body{font-size:1rem}.footer-grid{grid-template-columns:1fr}.footer-bottom{gap:16px;flex-wrap:wrap}}
@media (max-width:375px){.container{width:calc(100% - 20px)}.brand strong{font-size:.95rem}.menu-toggle,.search-open{padding:7px;font-size:.78rem}.home-intro h1,.community-hero h1,.app-hero h1,.bulletin-hero h1,.guide-hero h1,.info-hero h1,.faq-head h1,.index-head h1,.search-page-head h1{font-size:2.08rem}.search-panel{padding:26px 20px}.search-form>div{flex-direction:column}.search-form button{min-height:44px}.article-head h1{font-size:2.08rem}}

.handbook-nav{padding-top:40px}.scenario-index{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line)}.scenario-index a{display:flex;gap:10px;padding:14px 12px;border-bottom:1px solid var(--line);font-size:.9rem}.scenario-index a span{color:var(--brand);font-weight:900}.scenario-list{padding-block:72px}.scenario-list article{display:grid;grid-template-columns:80px 1fr;gap:28px;padding:34px 0;border-top:1px solid var(--line);scroll-margin-top:100px}.scenario-no{font-size:1.5rem;color:var(--brand);font-weight:900}.scenario-list h2{font-size:1.55rem;margin:0 0 18px}.scenario-list h3{font-size:.9rem;margin:20px 0 4px;color:var(--brand)}.scenario-list p{margin:0;color:#534b46;max-width:850px}.term-list{display:grid;gap:18px}.term-list>article{padding:28px;border:1px solid var(--line);border-radius:18px;background:#fffaf5}.term-head{display:flex;align-items:baseline;gap:14px}.term-head span{color:var(--brand);font-size:.8rem;font-weight:900}.term-head h2{margin:0;font-size:1.45rem}.term-definition{font-size:1.04rem;margin:12px 0 20px}.term-notes{display:grid;grid-template-columns:1fr 1fr;gap:28px;border-top:1px solid var(--line);padding-top:18px}.term-notes h3{font-size:.86rem;color:var(--brand);margin:0 0 6px}.term-notes p{margin:0;color:var(--muted);font-size:.92rem}.reference-links{display:grid;grid-template-columns:1fr 1fr;gap:16px}.reference-links a{padding:24px;border:1px solid var(--line);border-radius:16px;background:#fffaf5;display:grid;gap:8px}.reference-links span{color:var(--muted)}
@media (max-width:768px){.scenario-index{grid-template-columns:1fr 1fr}.term-notes{grid-template-columns:1fr}.reference-links{grid-template-columns:1fr}}
@media (max-width:600px){.scenario-index{grid-template-columns:1fr}.scenario-list article{grid-template-columns:44px 1fr;gap:14px}.term-list>article{padding:20px}}

.material-list{display:grid;gap:20px}.material-list>article{scroll-margin-top:96px;border-top:1px solid var(--line);padding:30px 0}.material-title{display:flex;align-items:baseline;gap:15px;margin-bottom:18px}.material-title span{color:var(--brand);font-size:.8rem;font-weight:900}.material-title h2{margin:0;font-size:1.55rem}.material-columns{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.material-columns section{padding:18px;border:1px solid var(--line);border-radius:14px;background:#fffaf5}.material-columns h3{margin:0 0 8px;color:var(--brand);font-size:.88rem}.material-columns p{margin:0;color:var(--muted);font-size:.91rem}@media(max-width:768px){.material-columns{grid-template-columns:1fr}.reference-links{grid-template-columns:1fr}}