:root{--bg:#F7F8FC;--card:#fff;--soft:#EEF3FA;--ink:#202B43;--body:#38445A;--sub:#637189;--accent:#7566AB;--line:#E2E8F1}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--body);font:16px/1.78 system-ui,-apple-system,"Microsoft YaHei",sans-serif;overflow-wrap:anywhere}a{color:#51448c;text-underline-offset:4px}a:hover{color:#312663}button,input{font:inherit}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #7566AB;outline-offset:3px}.wrap{max-width:1160px;padding:0 28px;margin:auto}.brandbar{background:white;border-bottom:1px solid var(--line)}.brandinner{min-height:70px;display:flex;align-items:center;gap:22px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;white-space:nowrap}.brand img{height:28px;max-width:170px;width:auto;object-fit:contain}.brand small{display:block;font-size:10px;letter-spacing:.14em;line-height:1.1;color:var(--sub)}.toplinks,.quicklinks{display:flex;align-items:center;gap:22px;margin-left:auto}.toplinks a,.quicklinks a,.catalog a{text-decoration:none;color:var(--body);font-size:14px}.toplinks a[aria-current],.quicklinks a[aria-current]{color:var(--accent);text-decoration:underline;text-underline-offset:7px}.controls{display:flex;align-items:center;gap:8px}.iconbtn{min-width:44px;min-height:44px;border:1px solid var(--line);border-radius:10px;background:white;color:var(--ink);display:grid;place-items:center;font-size:20px}.fallback-link{display:none}.ribbon{background:var(--soft);border-bottom:1px solid var(--line)}.ribbon .wrap{display:flex;align-items:center;min-height:40px;gap:20px}.ribbon p{font-size:13px;color:var(--sub);margin:0}.quicklinks{gap:20px}.main{padding-top:30px;padding-bottom:54px}.pagehead{margin:8px 0 24px}.eyebrow{font-size:13px;letter-spacing:.11em;color:var(--accent);font-weight:700}.pagehead h1,.hero h1{font-size:34px;line-height:1.25;color:var(--ink);margin:7px 0 15px}.lead{max-width:720px;font-size:17px;line-height:1.8;color:var(--body)}h2{font-size:25px;line-height:1.4;color:var(--ink);margin:0 0 12px}h3{font-size:19px;line-height:1.4;color:var(--ink);margin:0 0 9px}p{margin:0 0 14px}.section{margin:54px 0}.card,.panel{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:22px;min-width:0}.soft{background:var(--soft)}.hero,.split,.feature,.editorial{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:26px;align-items:center}.hero{background:#fff;border:1px solid var(--line);border-radius:14px;padding:28px}.hero .lead{max-width:600px}.hero-media{max-height:260px}.media{min-width:0;background:var(--soft);border-radius:11px;min-height:115px;padding:10px;display:flex;justify-content:center;align-items:center;text-align:center;color:var(--sub)}.media img{display:block;max-width:100%;width:auto;height:auto;max-height:inherit;object-fit:contain;object-position:center}.media:not(:has(img)){font-size:16px;font-weight:600;color:var(--accent)}.media.small{max-height:175px}.media.medium{max-height:260px}.media.portrait{max-height:340px;max-width:210px;margin:auto}.media.portrait img{max-height:320px}.actions,.related{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}.linkbtn{min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:7px 16px;border-radius:10px;background:#283956;color:white;text-decoration:none;font-weight:600}.linkbtn.alt{background:var(--soft);color:var(--ink);border:1px solid var(--line)}.grid4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.grid3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.tile .media{margin-bottom:14px}.tile p{font-size:15px}.kicker{color:var(--accent);font-size:13px;font-weight:700;letter-spacing:.1em}.essay{max-width:770px}.essay p{line-height:1.82}.essay section{margin:0 0 25px}.notice{border-left:3px solid var(--accent);background:var(--soft);padding:15px 18px;margin:24px 0;border-radius:0 10px 10px 0}.page-layout-a .introgrid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:26px;align-items:center;margin-bottom:28px}.page-layout-b .intro-media{max-width:630px;margin:0 auto 30px}.page-layout-b .essay{max-width:none;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.page-layout-b .essay section{padding:22px;background:white;border:1px solid var(--line);border-radius:12px}.page-layout-c .articlegrid{display:grid;grid-template-columns:minmax(0,220px) minmax(0,1fr);gap:26px;align-items:start}.toc{position:static}.toc a{display:block;padding:8px 0}.page-layout-c .essay{max-width:790px}.page-layout-c .intro-media{max-width:560px;margin:0 0 24px}.footer{background:#202B43;color:#f3f5fb;padding:40px 0 24px}.footer a{color:#e3e9ff;text-decoration:none}.footer a:hover{text-decoration:underline;color:#fff}.footerbrand{font-size:19px;font-weight:800;display:flex;gap:12px;align-items:center;margin-bottom:22px}.footerbrand img{max-height:28px;max-width:145px;width:auto;object-fit:contain}.footergrid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:28px}.footergrid h2{font-size:16px;color:white;margin-bottom:13px}.footergrid a{display:block;margin:6px 0;font-size:14px}.footnote{border-top:1px solid #566075;margin-top:26px;padding-top:20px;font-size:13px;color:#e3e9ff}.mobilefoot{display:none}.overlay[hidden]{display:none!important}.overlay{position:fixed;inset:0;z-index:50;background:#111b2ab8;padding:14px;display:flex;justify-content:center;align-items:flex-start}.overlaybox{width:min(880px,100%);max-height:calc(100dvh - 28px);overflow:auto;background:white;border-radius:12px;padding:24px;margin:auto;box-shadow:0 15px 55px #1115}.overlayhead{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}.overlayhead h2{margin:0}.menugroups{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.menugroups nav{background:var(--soft);padding:15px;border-radius:10px}.menugroups nav a,.results a{display:block;padding:8px 4px}.searchbox label{display:block;font-weight:700;margin-bottom:8px}.searchbox input{width:100%;padding:12px;border-radius:9px;border:1px solid #9ba9bd;min-height:46px}.results{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:2px 16px;margin-top:12px}.results a{background:var(--soft);border-radius:6px;padding:7px 12px}.faqitem{padding:18px 0;border-bottom:1px solid var(--line)}.faqitem p{max-width:790px}.minirow{display:flex;gap:12px;align-items:center}.minirow .media{width:40%;flex:none}.smalltext{color:var(--sub);font-size:14px}body.layeropen{overflow:hidden}@media(max-width:1024px){.wrap{padding:0 22px}.toplinks a:nth-child(n+3){display:none}.quicklinks a:nth-child(n+4){display:none}.ribbon p{display:none}.grid4{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:768px){.wrap{padding:0 16px}.brandinner{min-height:60px}.toplinks,.ribbon,.service-top{display:none!important}.controls{margin-left:auto}.fallback-link{display:inline-flex;align-items:center;font-size:13px}.main{padding-top:18px}.hero,.split,.feature,.editorial,.page-layout-a .introgrid,.page-layout-c .articlegrid{grid-template-columns:1fr}.hero{padding:18px}.hero-media{max-height:220px}.media.medium{max-height:220px}.media.small{max-height:160px}.page-layout-b .essay{grid-template-columns:1fr}.page-layout-c .toc{display:none}.page-layout-c .intro-media{margin:0 0 20px}.section{margin:36px 0}.pagehead h1,.hero h1{font-size:28px}h2{font-size:22px}.grid3{grid-template-columns:1fr}.footergrid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.mobilefoot{display:flex;gap:16px;flex-wrap:wrap;margin-top:25px}.overlaybox{padding:18px}.menugroups{grid-template-columns:1fr}.menugroups nav{padding:10px}.results{grid-template-columns:1fr}}@media(max-width:480px){.grid4,.grid2{grid-template-columns:1fr}.footergrid{grid-template-columns:1fr}.brand img{max-width:112px}.media.portrait{max-height:320px}.hero-media{max-height:220px}.minirow{display:block}.minirow .media{width:100%;margin-bottom:12px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}