:root{--page:#F6F5F1;--surface:#FFFFFF;--surface-soft:#EDEFEA;--ink:#202A28;--muted:#596560;--primary:#23665D;--primary-dark:#184B44;--accent:#B27A46;--line:#D9DEDA;--footer:#1B302D}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--page);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;font-size:16px;line-height:1.75;overflow-x:hidden}img{max-width:100%;height:auto;display:block}[hidden]{display:none!important}a{color:var(--primary);text-decoration-thickness:1px;text-underline-offset:3px}a:hover{color:var(--primary-dark)}button,a{touch-action:manipulation}.skip-link{position:absolute;left:-9999px;top:8px;background:var(--ink);color:white;padding:8px 12px;z-index:100}.skip-link:focus{left:8px}.site-header{background:#fff;border-bottom:1px solid var(--line);position:relative;z-index:20}.header-inner{height:68px;max-width:1180px;margin:auto;padding:0 32px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;min-width:0;flex:0 0 auto}.brand-logo{height:32px;width:auto;max-width:150px;object-fit:contain}.brand-mark{width:32px;height:32px;border-radius:9px;background:var(--primary);color:white;display:grid;place-items:center;font-weight:700}.brand-copy{display:flex;flex-direction:column;line-height:1.05;white-space:nowrap}.brand-copy strong{font-size:16px}.brand-copy small{font-size:10px;letter-spacing:.08em;color:var(--muted);margin-top:5px}.main-nav{display:flex;align-items:stretch;justify-content:center;gap:4px;min-width:0;flex:1;height:100%}.main-nav a,.header-actions>a{display:flex;align-items:center;min-height:44px;padding:0 10px;color:var(--ink);text-decoration:none;border-bottom:2px solid transparent;white-space:nowrap}.main-nav a:hover,.main-nav a.is-active,.header-actions>a:hover,.header-actions>a.is-active{color:var(--primary);border-bottom-color:var(--primary);background:var(--surface-soft)}.header-actions{display:flex;align-items:center;gap:8px}.menu-toggle{min-height:44px;border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:9px;padding:0 14px;font:inherit;cursor:pointer}.menu-toggle:hover,.menu-toggle[aria-expanded="true"]{border-color:var(--primary);background:var(--surface-soft);color:var(--primary)}.mobile-toggle{display:none}.directory{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.desktop-directory{position:absolute;left:50%;transform:translateX(-50%);top:68px;width:min(920px,calc(100% - 48px));border-radius:0 0 12px 12px;box-shadow:0 18px 36px rgba(24,75,68,.12)}.directory-inner{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;padding:22px}.directory-group h2,.mobile-group h2{font-size:14px;color:var(--accent);margin:0 0 9px}.directory-link{display:block;padding:8px 9px;border-radius:8px;text-decoration:none;color:var(--ink)}.directory-link:hover,.directory-link.is-active{background:var(--surface-soft)}.directory-link strong,.directory-link span{display:block}.directory-link strong{font-size:15px}.directory-link span{font-size:13px;color:var(--muted);line-height:1.45;margin-top:2px}.mobile-directory{display:none}.site-main{max-width:1180px;margin:0 auto;padding:0 32px 70px}.section{margin:56px 0}.eyebrow{font-size:13px;letter-spacing:.08em;color:var(--primary);font-weight:700;text-transform:uppercase}.hero{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(320px,.95fr);gap:44px;align-items:center;padding:54px 0 24px}.hero h1,.page-head h1{font-size:32px;line-height:1.25;margin:8px 0 18px;letter-spacing:-.02em}.hero p{max-width:650px;color:var(--muted);margin:0 0 22px}.hero-actions,.inline-links{display:flex;flex-wrap:wrap;gap:10px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 16px;border-radius:9px;background:var(--primary);color:white;text-decoration:none}.btn:hover{background:var(--primary-dark);color:white}.btn.secondary{background:transparent;color:var(--primary);border:1px solid var(--primary)}.hero-visual,.media-box{background:var(--surface-soft);border:1px solid var(--line);border-radius:12px;padding:10px}.hero-visual img{max-height:250px;width:100%;object-fit:contain}.index-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--line);border-left:1px solid var(--line);background:var(--surface)}.index-item{padding:20px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.index-item .num{display:block;color:var(--accent);font-size:13px}.index-item h2{font-size:18px;margin:5px 0}.index-item p{margin:0;color:var(--muted);font-size:14px;line-height:1.65}.mag-row{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(240px,.6fr);gap:34px;align-items:center}.mag-row.reverse{grid-template-columns:minmax(240px,.65fr) minmax(0,1.35fr)}.mag-row h2,.section-title{font-size:24px;line-height:1.35;margin:0 0 14px}.prose p{margin:0 0 1em}.prose p:last-child{margin-bottom:0}.media-box img{width:100%;max-height:225px;object-fit:contain}.method-lines{border-top:1px solid var(--line)}.method-line{display:grid;grid-template-columns:160px 1fr auto;gap:20px;align-items:center;padding:16px 0;border-bottom:1px solid var(--line)}.method-line strong{font-size:16px}.method-line span{color:var(--muted)}.production{display:grid;grid-template-columns:.9fr 1.1fr;gap:34px;align-items:start}.production .media-box img{max-height:240px}.mini-stack article{padding:0 0 17px;margin-bottom:17px;border-bottom:1px solid var(--line)}.mini-stack article:last-child{margin-bottom:0}.mini-stack h3{font-size:18px;margin:0 0 5px}.mini-stack p{margin:0;color:var(--muted)}.bookmark-layout{display:grid;grid-template-columns:1.2fr .8fr;gap:34px}.lead-read{background:var(--surface);border-left:4px solid var(--primary);padding:22px;border-radius:0 12px 12px 0}.short-recs{display:grid;gap:0}.short-recs a{padding:15px 0;border-bottom:1px solid var(--line);text-decoration:none;color:var(--ink)}.short-recs a strong{display:block}.short-recs a span{font-size:14px;color:var(--muted)}.soft-section{background:var(--surface-soft);margin-left:-32px;margin-right:-32px;padding:44px 32px}.guide-two{display:grid;grid-template-columns:1fr 1fr;gap:40px}.guide-list{display:grid;gap:12px}.guide-list div{background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px}.guide-list strong{display:block}.guide-list span{color:var(--muted);font-size:14px}.mobile-promo{display:grid;grid-template-columns:1fr 300px;gap:40px;align-items:center}.icon-copy{display:grid;grid-template-columns:auto 1fr;gap:16px;align-items:start}.small-icon{width:56px;max-width:64px;height:auto}.mobile-art{text-align:center}.mobile-art img{max-width:240px;max-height:340px;object-fit:contain;margin:auto}.closing-links{display:grid;grid-template-columns:1fr 1fr;gap:40px;border-top:1px solid var(--line);padding-top:24px}.closing-links div{display:flex;flex-wrap:wrap;gap:10px 18px}.page-head{max-width:780px;padding:42px 0 28px;border-bottom:1px solid var(--line)}.breadcrumbs{font-size:13px;color:var(--muted)}.breadcrumbs a{color:var(--muted)}.page-head p{color:var(--muted);margin:0}.article-shell{display:grid;grid-template-columns:minmax(0,780px) minmax(180px,1fr);gap:42px;align-items:start;margin-top:30px}.article-shell.single{display:block;max-width:780px}.article-shell>.article{min-width:0}.article h2{font-size:24px;line-height:1.35;margin:38px 0 12px}.article h2:first-child{margin-top:0}.article h3{font-size:18px;margin:26px 0 8px}.article p{margin:0 0 1em}.article ul,.article ol{padding-left:1.35em}.article li{margin:.45em 0}.aside{border-left:1px solid var(--line);padding-left:20px;position:sticky;top:92px}.aside h2{font-size:16px;margin:0 0 9px}.aside a{display:block;padding:7px 0}.concepts,.steps,.route-list,.archive-list,.faq-list,.support-grid{display:grid;gap:14px}.concepts{grid-template-columns:1fr 1fr;margin:22px 0}.concept{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:17px}.concept strong{display:block;margin-bottom:5px}.concept p{font-size:14px;color:var(--muted);margin:0}.numbered{counter-reset:step}.numbered article{counter-increment:step;border-top:1px solid var(--line);padding:22px 0}.numbered article h2{margin:0 0 8px}.numbered article h2:before{content:"0" counter(step) " · ";color:var(--accent)}.inline-media{margin:24px 0}.inline-media img{max-height:230px;margin:auto;object-fit:contain}.split-record{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center;margin:32px 0}.split-record.reverse .media-box{order:-1}.checklist{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:18px 20px;margin:24px 0}.checklist h2{margin:0 0 8px;font-size:19px}.stage{border-top:3px solid var(--primary);background:var(--surface);padding:20px;border-radius:0 0 12px 12px}.sample-note{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;background:#fff;border:1px solid var(--line);padding:18px;border-radius:10px;white-space:pre-line}.route{padding:20px;border:1px solid var(--line);background:var(--surface);border-radius:12px}.route h2{margin:0 0 7px;font-size:21px}.chapter{padding:28px 0;border-bottom:1px solid var(--line)}.chapter h2{margin:0 0 10px}.archive-item{display:grid;grid-template-columns:140px 1fr;gap:22px;padding:18px 0;border-bottom:1px solid var(--line)}.archive-item strong{font-size:18px}.archive-item p{margin:0}.phone-layout{display:grid;grid-template-columns:1fr 250px;gap:34px;align-items:start}.phone-layout .small-icon-wrap{margin-bottom:18px}.phone-layout .mobile-art{position:sticky;top:92px}.support-grid{grid-template-columns:1fr 1fr}.support-card{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:20px}.support-card h2{font-size:20px;margin:0 0 8px}.faq-item{border-bottom:1px solid var(--line);padding:18px 0}.faq-item h2{font-size:19px;margin:0 0 7px}.site-footer{background:var(--footer);color:#F4F5F1;padding:42px 32px 84px}.footer-inner{max-width:1180px;margin:auto;display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:36px}.footer-intro p{color:#DDE5E2;max-width:360px}.footer-column h2{font-size:15px;color:#F4F5F1;margin:0 0 9px}.footer-column a{display:block;color:#E8F3F0;padding:4px 0}.footer-bottom{max-width:1180px;margin:28px auto 0;padding-top:18px;border-top:1px solid rgba(255,255,255,.18);display:flex;justify-content:space-between;gap:24px;color:#DDE5E2;font-size:14px}.footer-bottom p{margin:0}.mobile-bottom{display:none}
@media(max-width:1020px){.header-inner{padding:0 24px;gap:15px}.main-nav a{padding:0 7px;font-size:14px}.brand-copy small{display:none}.site-main{padding-left:24px;padding-right:24px}.soft-section{margin-left:-24px;margin-right:-24px;padding-left:24px;padding-right:24px}}
@media(max-width:800px){.mag-row,.mag-row.reverse,.production,.bookmark-layout,.guide-two,.mobile-promo,.split-record,.phone-layout{grid-template-columns:1fr}.split-record.reverse .media-box{order:0}.article-shell{grid-template-columns:1fr}.aside{position:static;border-left:0;border-top:1px solid var(--line);padding:20px 0 0}.mobile-promo{gap:24px}.mobile-art img{max-width:175px;max-height:260px}.phone-layout .mobile-art{position:static}.article-shell{gap:24px}}
@media(max-width:767px){.site-header{min-height:60px}.header-inner{height:60px;padding:0 16px}.brand-logo{height:28px}.brand-mark{width:28px;height:28px}.brand-copy strong{font-size:15px}.brand-copy small{display:none}.main-nav,.desktop-toggle,.mobile-reading-link{display:none}.header-actions{margin-left:auto}.mobile-toggle{display:inline-flex;align-items:center}.mobile-directory{display:block;position:static;padding:12px 16px 18px}.mobile-primary{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;margin-bottom:16px}.mobile-primary a,.mobile-links a{min-height:44px;display:flex;align-items:center;border:1px solid var(--line);border-radius:8px;padding:8px 10px;text-decoration:none;color:var(--ink);background:#fff}.mobile-primary a.is-active,.mobile-links a.is-active{border-color:var(--primary);background:var(--surface-soft);color:var(--primary)}.mobile-group{border-top:1px solid var(--line);padding-top:12px;margin-top:12px}.mobile-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px}.desktop-directory{display:none}.site-main{padding:0 16px 92px}.section{margin:36px 0}.hero{grid-template-columns:1fr;gap:22px;padding:34px 0 12px}.hero h1,.page-head h1{font-size:27px}.hero-visual img{max-height:190px}.index-grid{grid-template-columns:1fr}.index-item{padding:16px}.mag-row,.mag-row.reverse{gap:20px}.mag-row h2,.section-title,.article h2{font-size:21px}.method-line{grid-template-columns:1fr;gap:4px;padding:14px 0}.soft-section{margin-left:-16px;margin-right:-16px;padding:30px 16px}.small-icon{width:46px}.closing-links{grid-template-columns:1fr;gap:18px}.page-head{padding:30px 0 22px}.article-shell{margin-top:24px}.concepts,.support-grid{grid-template-columns:1fr}.archive-item{grid-template-columns:1fr;gap:5px}.media-box img,.inline-media img{max-height:190px}.site-footer{padding:34px 16px 96px}.footer-inner{grid-template-columns:1fr;gap:24px}.footer-bottom{display:block}.footer-bottom p+p{margin-top:8px}.mobile-bottom{position:fixed;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(4,1fr);min-height:56px;padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid var(--line);z-index:30}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:54px;padding:6px 4px;text-align:center;text-decoration:none;color:var(--ink);font-size:13px}.mobile-bottom a:hover{background:var(--surface-soft);color:var(--primary)}}
@media(max-width:360px){.brand-copy strong{font-size:14px}.menu-toggle{padding:0 11px}.mobile-primary,.mobile-links{grid-template-columns:1fr}.hero-actions .btn{width:100%}}
