:root{--bg:#F6F4EE;--card:#fff;--pale:#ECEFE8;--sand:#F2E7D7;--green:#21463B;--green2:#17352D;--green3:#3C685A;--orange:#C56B3D;--gold:#C6A15B;--title:#1F2D28;--text:#3E4A45;--muted:#66716C;--hint:#78817D;--border:#D9DED8;--foot:#183129;--footText:#F4F3ED;--shadow:0 8px 24px rgba(31,45,40,.06)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8;overflow-x:hidden}a{color:var(--green);text-decoration-thickness:1px;text-underline-offset:3px}a:hover{color:var(--orange)}img{display:block;max-width:100%;height:auto;object-fit:contain}.skip-link{position:absolute;left:12px;top:-80px;background:#fff;padding:10px 14px;z-index:100}.skip-link:focus{top:12px}button,a{min-height:44px}button:focus-visible,a:focus-visible{outline:3px solid var(--gold);outline-offset:3px}.site-header{position:relative;z-index:20;background:rgba(246,244,238,.98);border-bottom:1px solid var(--border)}.header-inner{max-width:1180px;height:70px;margin:auto;padding:0 32px;display:flex;align-items:center;gap:26px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;min-width:max-content}.brand-logo{height:32px;width:auto;max-width:165px}.brand-copy{display:grid;line-height:1.15}.brand-copy strong{font-size:16px;color:var(--green2)}.brand-copy small{font-size:10px;letter-spacing:.08em;color:var(--muted);margin-top:4px}.desktop-nav{display:flex;align-items:center;gap:22px;margin-left:auto}.desktop-nav a,.header-actions a{text-decoration:none;font-size:15px;color:var(--title);display:flex;align-items:center}.desktop-nav a.is-current{color:var(--orange);font-weight:700}.header-actions{display:flex;align-items:center;gap:10px}.directory-toggle,.directory-close,.btn{border:1px solid var(--green);background:var(--green);color:#fff;border-radius:9px;padding:8px 14px;font:inherit;cursor:pointer}.mobile-entry{border-left:1px solid var(--border);padding-left:14px}.site-directory{background:#fff;border-bottom:1px solid var(--border)}.directory-inner{max-width:1180px;margin:auto;padding:26px 32px 30px}.desktop-directory{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:26px}.desktop-directory h2,.mobile-directory h2{font-size:15px;margin:0 0 10px;color:var(--green2)}.desktop-directory a{display:block;text-decoration:none;padding:5px 0;min-height:auto}.desktop-directory small{display:block;color:var(--muted);font-size:12px;line-height:1.45}.mobile-directory{display:none}.mobile-bottom-nav{display:none}main{min-height:60vh}.wrap{max-width:1180px;margin:auto;padding-left:32px;padding-right:32px}.article{max-width:780px;margin:auto}.wide{max-width:980px;margin:auto}.page-head{padding:42px 0 28px}.breadcrumbs{font-size:14px;color:var(--muted);margin:0 0 12px}.page-head h1,.hero h1{font-size:34px;line-height:1.25;color:var(--title);margin:0 0 16px}.page-lede{max-width:760px;font-size:17px;color:var(--muted);margin:0}.tag{display:inline-flex;align-items:center;background:var(--sand);color:var(--green2);border-radius:999px;padding:5px 10px;font-size:13px;min-height:auto;margin-bottom:12px}section.content-section{padding:52px 0;border-top:1px solid rgba(217,222,216,.8)}h2{font-size:25px;line-height:1.35;color:var(--title);margin:0 0 18px}h3{font-size:19px;line-height:1.45;color:var(--title);margin:28px 0 10px}p{margin:0 0 18px}ul,ol{padding-left:1.25em}.content-image{background:var(--pale);border:1px solid var(--border);border-radius:12px;padding:8px;margin:24px auto;max-height:300px}.img-compact{max-width:420px;max-height:240px}.img-narrow{max-width:360px;max-height:220px}.img-mobile{max-width:240px;max-height:380px}.prose-links{display:flex;flex-wrap:wrap;gap:10px 18px;margin-top:24px}.prose-links a{font-weight:650}.panel{background:#fff;border:1px solid var(--border);border-radius:12px;padding:22px}.soft{background:var(--pale)}.sand{background:var(--sand)}.two-col{display:grid;grid-template-columns:minmax(0,1fr) minmax(260px,.7fr);gap:34px;align-items:start}.split-even{display:grid;grid-template-columns:1fr 1fr;gap:28px}.three-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.side-layout{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:40px}.side-index{position:sticky;top:18px;border-left:2px solid var(--border);padding-left:18px}.side-index a{display:block;min-height:auto;padding:4px 0;text-decoration:none}.number-track{counter-reset:stage}.stage{position:relative;padding:0 0 34px 64px;border-left:1px solid var(--border);margin-left:18px}.stage:before{counter-increment:stage;content:counter(stage);position:absolute;left:-19px;top:0;width:38px;height:38px;border-radius:50%;background:var(--green);color:#fff;display:grid;place-items:center;font-weight:700}.steps-line{border-left:2px solid var(--gold);margin-left:10px;padding-left:28px}.steps-line article{padding:0 0 28px}.hero{padding:52px 0 58px}.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:46px;align-items:center;min-height:340px}.hero-copy p{max-width:650px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.hero-actions a{display:inline-flex;align-items:center;text-decoration:none;border:1px solid var(--green);border-radius:9px;padding:8px 14px;font-weight:650}.hero-actions a:first-child{background:var(--green);color:#fff}.hero-visual{max-width:430px;max-height:300px;margin:auto}.reading-lines{display:grid;grid-template-columns:1.35fr .8fr;gap:30px}.reading-main{padding:28px;background:#fff;border:1px solid var(--border);border-radius:14px}.reading-secondary{display:grid;gap:22px}.reading-secondary article{padding-bottom:22px;border-bottom:1px solid var(--border)}.purpose-layout{display:grid;grid-template-columns:280px 1fr;gap:40px}.purpose-list{list-style:none;padding:0;margin:0}.purpose-list li{padding:10px 0;border-bottom:1px solid var(--border);font-weight:700;color:var(--green2)}.editorial-flow{display:grid;grid-template-columns:1.4fr .6fr;gap:38px}.topic-feature{display:grid;grid-template-columns:1.2fr .8fr;gap:30px}.topic-minis{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:24px}.topic-minis article{border-top:2px solid var(--gold);padding-top:16px}.letter{max-width:740px}.link-strip{display:flex;flex-wrap:wrap;gap:8px 18px;padding-top:18px;border-top:1px solid var(--border)}.site-footer{background:var(--foot);color:var(--footText);padding:44px 0}.footer-inner{max-width:1180px;margin:auto;padding:0 32px;display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:26px}.site-footer h2{font-size:16px;color:#fff;margin-bottom:10px}.site-footer p{font-size:14px;color:#d8dfda}.site-footer a{display:block;color:var(--footText);text-decoration:none;font-size:14px;min-height:auto;padding:3px 0}.quote-box{border-left:4px solid var(--orange);background:#fff;padding:18px 22px;margin:26px 0}.faq-item{padding:0 0 24px;margin-bottom:24px;border-bottom:1px solid var(--border)}.faq-item h2{font-size:20px;margin-bottom:8px}.compact-list a{display:block;padding:8px 0;border-bottom:1px solid var(--border);text-decoration:none}.notice-list li{margin-bottom:10px}.article-note{color:var(--muted);font-size:15px}.mobile-product{display:grid;grid-template-columns:240px 1fr;gap:42px;align-items:start}.mobile-product .content-image{margin-top:0}.archive-group{padding:22px 0;border-top:1px solid var(--border)}.archive-group h2{font-size:21px}.archive-group a{display:inline-block;margin:0 16px 8px 0;min-height:auto}.notes-article{padding:48px 0;border-top:1px solid var(--border)}.notes-article.narrow{max-width:680px;margin:auto}.notes-article.interleave .content-image{float:right;max-width:340px;margin:0 0 24px 30px}.topic-row{padding:30px 0;border-top:1px solid var(--border)}.topic-row.alt{display:grid;grid-template-columns:.8fr 1.2fr;gap:34px}.mini-index{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.mini-index a{background:#fff;border:1px solid var(--border);border-radius:9px;padding:12px;text-decoration:none}.spaced-list li{margin-bottom:16px}
@media(max-width:900px){.header-inner{padding:0 22px}.desktop-nav{display:none}.brand-copy small{display:none}.desktop-directory{display:none}.mobile-directory{display:block;padding:20px 22px}.mobile-directory p{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:3px 12px}.mobile-directory a{min-height:auto;padding:5px 0;text-decoration:none}.wrap{padding-left:22px;padding-right:22px}.two-col,.split-even,.side-layout,.hero-grid,.reading-lines,.purpose-layout,.editorial-flow,.topic-feature,.mobile-product,.topic-row.alt{grid-template-columns:1fr}.three-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.side-index{position:static;border-left:0;border-top:1px solid var(--border);padding:18px 0 0}.hero{padding:42px 0}.hero-grid{min-height:0}.hero-visual{max-height:220px}.topic-minis{grid-template-columns:1fr 1fr}.footer-inner{grid-template-columns:1.3fr 1fr 1fr}.footer-brand{grid-column:1/-1}}
@media(max-width:640px){body{padding-bottom:calc(56px + env(safe-area-inset-bottom))}.header-inner{height:60px;padding:0 16px;gap:8px}.brand{gap:6px}.brand-logo{height:27px;max-width:120px}.brand-copy strong{font-size:14px}.header-actions{margin-left:auto;gap:4px}.directory-toggle{padding:6px 10px;background:transparent;color:var(--green);font-size:14px}.mobile-entry{padding-left:8px;font-size:14px}.directory-inner{padding-left:16px;padding-right:16px}.mobile-directory p{grid-template-columns:repeat(2,minmax(0,1fr));font-size:14px}.wrap{padding-left:16px;padding-right:16px}.page-head{padding:34px 0 22px}.page-head h1,.hero h1{font-size:28px}.page-lede{font-size:16px}h2{font-size:22px}h3{font-size:18px}section.content-section{padding:38px 0}.panel{padding:17px}.three-grid,.topic-minis,.mini-index{grid-template-columns:1fr}.content-image{max-width:100%;max-height:200px}.img-mobile{max-width:190px;max-height:290px}.hero-visual{max-width:100%;max-height:220px}.prose-links{display:grid;gap:6px}.footer-inner{padding:0 16px;grid-template-columns:1fr 1fr;gap:22px}.footer-brand{grid-column:1/-1}.mobile-bottom-nav{position:fixed;left:0;right:0;bottom:0;height:calc(56px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid var(--border);display:grid;grid-template-columns:repeat(4,1fr);z-index:30}.mobile-bottom-nav a{display:grid;place-items:center;text-decoration:none;color:var(--green2);font-size:14px}.notes-article.interleave .content-image{float:none;max-width:100%;margin:24px auto}.stage{padding-left:44px}.topic-row.alt{gap:10px}}
@media(max-width:370px){.mobile-directory p{grid-template-columns:1fr}.brand-copy strong{font-size:13px}.mobile-entry{font-size:13px}.directory-toggle{font-size:13px;padding:5px 8px}.footer-inner{grid-template-columns:1fr}}