:root{--bg:#F6F4EE;--card:#fff;--soft:#ECEFE8;--sand:#F2E7D7;--green:#21463B;--green2:#17352D;--green3:#3C685A;--orange:#C56B3D;--gold:#C6A15B;--title:#1F2D28;--text:#3E4A45;--muted:#66716C;--hint:#78817D;--line:#D9DED8;--footer:#183129;--footerText:#F4F3ED}
*{box-sizing:border-box}html{overflow-x:hidden}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:none}a:hover{text-decoration:underline}a:focus-visible,button:focus-visible{outline:3px solid var(--gold);outline-offset:3px}img{display:block;max-width:100%;height:auto;object-fit:contain}button{font:inherit}.site-header{background:#fff;border-bottom:1px solid var(--line);position:relative;z-index:5}.header-inner{max-width:1180px;height:70px;margin:auto;padding:0 32px;display:flex;align-items:center;gap:24px}.brand{display:flex;align-items:center;gap:10px;min-width:220px;color:var(--title)}.brand-logo{height:32px;width:auto;max-width:165px}.brand-icon{height:32px;width:32px}.brand-text{display:flex;flex-direction:column;line-height:1.15}.brand-text b{font-size:16px}.brand-text small{font-size:10px;letter-spacing:.05em;color:var(--muted)}.desktop-nav{display:flex;gap:20px;align-items:center;flex:1;justify-content:center}.desktop-nav a,.header-actions a{font-size:15px;white-space:nowrap}.desktop-nav a[aria-current=page]{color:var(--orange);font-weight:700}.header-actions{display:flex;align-items:center;gap:10px}.directory-toggle,.directory-close{min-height:44px;border:1px solid var(--green);background:var(--green);color:white;border-radius:9px;padding:8px 14px;cursor:pointer}.mobile-link{padding:8px 4px}.mobile-actions{display:none;margin-left:auto;gap:8px;align-items:center}.mobile-actions a{min-height:44px;display:flex;align-items:center}.directory-panel{background:#fff;border-bottom:1px solid var(--line)}.directory-inner{max-width:1180px;margin:auto;padding:26px 32px}.desktop-directory{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:26px}.directory-panel h2{font-size:15px;color:var(--green);margin:0 0 10px}.directory-panel section>a{display:block;padding:7px 0;color:var(--title)}.directory-panel section>a span{display:block;font-size:12px;color:var(--muted);line-height:1.4}.desktop-close{grid-column:1/-1;justify-self:end}.mobile-directory{display:none}.page-shell{max-width:1180px;margin:auto;padding:0 32px}.page-head{max-width:900px;padding:48px 0 26px}.breadcrumbs{font-size:14px;color:var(--muted);margin-bottom:10px}.page-head h1{font-size:34px;line-height:1.25;color:var(--title);margin:0 0 14px}.page-head p{margin:0;max-width:780px}.tag{display:inline-block;margin-top:12px;padding:4px 9px;border:1px solid var(--line);border-radius:999px;font-size:14px;color:var(--green3);background:#fff}.section{padding:56px 0}.section h2{font-size:25px;line-height:1.35;color:var(--title);margin:0 0 18px}.section h3{font-size:19px;line-height:1.45;color:var(--title);margin:24px 0 10px}.section p{margin:0 0 16px}.narrow{max-width:760px}.wide{max-width:960px}.soft{background:var(--soft)}.sand{background:var(--sand)}.panel{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px}.subtle-shadow{box-shadow:0 8px 24px rgba(31,45,40,.06)}.text-links{display:flex;gap:18px;flex-wrap:wrap}.content-img{background:#f8f7f2;border:1px solid var(--line);padding:8px;border-radius:12px;max-height:240px;width:auto}.focus-img{max-height:300px}.hero{max-width:1180px;margin:auto;padding:48px 32px 24px;display:grid;grid-template-columns:minmax(0,7fr) minmax(280px,5fr);gap:54px;align-items:center;min-height:360px}.hero h1{font-size:34px;line-height:1.25;margin:0 0 18px;color:var(--title)}.hero p{max-width:650px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}.btn{display:inline-flex;min-height:44px;align-items:center;padding:9px 15px;border-radius:9px;background:var(--green);color:#fff}.btn.secondary{background:transparent;border:1px solid var(--green);color:var(--green)}.hero-media img{max-width:430px;max-height:300px;margin-left:auto}.reading-lines{display:grid;grid-template-columns:1.35fr .85fr;gap:28px}.main-line{padding:26px;background:#fff;border-left:4px solid var(--orange)}.main-line-inner{display:grid;grid-template-columns:1fr 220px;gap:24px;align-items:center}.side-lines{display:grid;gap:22px;align-content:center}.side-line{padding:18px 0;border-top:1px solid var(--line)}.purpose-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:36px;align-items:start}.purpose-list{list-style:none;padding:0;margin:0}.purpose-list li{padding:11px 0;border-bottom:1px solid var(--line);font-weight:700;color:var(--title)}.editorial-split{display:grid;grid-template-columns:1.25fr .75fr;gap:34px;align-items:start}.editorial-split.reverse{grid-template-columns:.75fr 1.25fr}.step-line{border-left:2px solid var(--gold);padding-left:26px;max-width:820px}.step{position:relative;margin-bottom:28px}.step:before{content:"";position:absolute;left:-33px;top:8px;width:12px;height:12px;background:var(--orange);border-radius:50%}.topic-grid{display:grid;grid-template-columns:1.35fr repeat(3,.65fr);gap:18px}.topic-main{background:#fff;padding:22px;border:1px solid var(--line);border-radius:12px}.topic-small{padding:18px;border-top:3px solid var(--green3);background:rgba(255,255,255,.55)}.article-track{display:grid;grid-template-columns:54px minmax(0,1fr);gap:18px;margin-bottom:26px}.track-num{font-weight:700;color:var(--orange)}.two-col{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:34px}.sidebar{border-left:1px solid var(--line);padding-left:22px}.sidebar a{display:block;padding:6px 0}.qa{margin-bottom:26px}.qa h2{font-size:19px;margin-bottom:8px}.footer-inner{max-width:1180px;margin:auto;padding:48px 32px 32px;display:grid;grid-template-columns:1.35fr repeat(4,1fr);gap:26px}.site-footer{background:var(--footer);color:var(--footerText)}.site-footer h2{font-size:17px;margin:0 0 12px;color:#fff}.site-footer p{font-size:14px;color:#dfe7e1}.site-footer a{display:block;color:#f4f3ed;padding:3px 0;font-size:14px}.footer-bottom{border-top:1px solid rgba(255,255,255,.14);max-width:1180px;margin:auto;padding:18px 32px 26px;font-size:14px;color:#dfe7e1}.bottom-nav{display:none}
@media(max-width:1024px){.desktop-nav{gap:12px}.header-inner{padding:0 22px}.page-shell,.hero{padding-left:22px;padding-right:22px}.footer-inner{padding-left:22px;padding-right:22px;grid-template-columns:1.5fr repeat(2,1fr)}.topic-grid{grid-template-columns:1.2fr 1fr}.topic-small:last-child{grid-column:2}.reading-lines{grid-template-columns:1fr}.side-lines{grid-template-columns:1fr 1fr}}
@media(max-width:768px){body{padding-bottom:72px}.header-inner{height:60px;padding:0 16px}.brand{min-width:0}.brand-text small{display:none}.brand-logo{height:28px}.brand-icon{height:28px;width:28px}.desktop-nav,.header-actions{display:none}.mobile-actions{display:flex}.desktop-directory{display:none}.mobile-directory{display:block;padding:18px 16px}.mobile-directory>div{margin-bottom:18px}.mobile-directory>div>a{display:inline-flex;width:49%;min-height:40px;align-items:center;border-bottom:1px solid var(--line);color:var(--title)}.page-shell{padding-left:16px;padding-right:16px}.page-head{padding:34px 0 20px}.page-head h1,.hero h1{font-size:28px}.section{padding:40px 0}.section h2{font-size:22px}.section h3{font-size:18px}.hero{grid-template-columns:1fr;gap:22px;padding:34px 16px 24px;min-height:0}.hero-media img{margin:0;max-height:220px}.main-line-inner,.purpose-layout,.editorial-split,.editorial-split.reverse,.two-col{grid-template-columns:1fr}.side-lines{grid-template-columns:1fr}.topic-grid{grid-template-columns:1fr}.topic-small:last-child{grid-column:auto}.content-img{max-height:200px}.focus-img{max-height:210px}.sidebar{border-left:0;border-top:1px solid var(--line);padding:18px 0 0}.footer-inner{padding:38px 16px 24px;grid-template-columns:1fr 1fr}.footer-bottom{padding:16px 16px 24px}.bottom-nav{position:fixed;z-index:9;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(--line);display:grid;grid-template-columns:repeat(4,1fr)}.bottom-nav a{display:flex;align-items:center;justify-content:center;font-size:14px;color:var(--title)}.article-track{grid-template-columns:38px minmax(0,1fr);gap:10px}.track-num{font-size:14px}}
@media(max-width:390px){.brand-text b{font-size:15px}.mobile-actions{gap:5px}.directory-toggle{padding:7px 10px}.mobile-directory>div>a{width:100%}.footer-inner{grid-template-columns:1fr}.hero-actions{flex-direction:column;align-items:stretch}.btn{justify-content:center}.main-line-inner{grid-template-columns:1fr}}