:root{--bg:#f7f9fc;--card:#fff;--text:#172033;--muted:#667085;--line:#e6eaf0;--accent:#2563eb;--accent2:#0f766e;--soft:#eef4ff;--radius:18px;--shadow:0 10px 35px rgba(16,24,40,.07)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.78}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.wrap{max-width:1120px;margin:auto;padding:0 22px}.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}.nav{height:68px;display:flex;align-items:center;gap:28px}.brand{font-size:20px;font-weight:800;color:var(--text);letter-spacing:-.02em}.navlinks{display:flex;gap:20px;margin-left:auto}.navlinks a{color:#344054;font-weight:600}.primary{display:inline-flex;align-items:center;justify-content:center;background:var(--accent);color:#fff!important;border-radius:12px;padding:10px 16px;font-weight:700;text-decoration:none!important}.official-btn{display:inline-flex;align-items:center;justify-content:center;background:#fff;color:#344054!important;border:1px solid var(--line);border-radius:12px;padding:9px 14px;font-weight:700;text-decoration:none!important}.hero{padding:64px 0 28px}.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:34px;align-items:start}.hero-grid.single{grid-template-columns:minmax(0,1fr)}.badge{display:inline-block;padding:6px 10px;border-radius:999px;background:var(--soft);color:var(--accent);font-size:13px;font-weight:700}.hero h1{font-size:clamp(34px,5vw,56px);line-height:1.12;letter-spacing:-.045em;margin:14px 0 18px}.lead{font-size:19px;color:#475467;max-width:760px}.hero-card{background:linear-gradient(145deg,#172033,#253b65);color:#fff;padding:26px;border-radius:24px;box-shadow:var(--shadow)}.hero-card h2{font-size:19px;margin-top:0}.hero-card a{color:#fff}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}.secondary{display:inline-flex;padding:10px 15px;border-radius:12px;border:1px solid var(--line);background:#fff;color:#344054;font-weight:700}.breadcrumbs{font-size:14px;color:var(--muted);padding-top:22px}.breadcrumbs a{color:#667085}.article{max-width:780px;margin:0 auto;padding:24px 0 72px}.article section{margin:34px 0}.article h2{font-size:25px;line-height:1.32;letter-spacing:-.02em;margin:0 0 12px}.article p{font-size:17px;margin:0;color:#344054}.panel,.note{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:0 4px 18px rgba(16,24,40,.035)}.panel.compare{border-color:#c7d7fe;background:#f7faff}.note{border-left:4px solid var(--accent2)}.diagnostic{display:grid;grid-template-columns:42px 1fr;gap:14px;align-items:start;margin:24px 0!important}.stepnum{width:36px;height:36px;display:flex;align-items:center;justify-content:center;background:#172033;color:#fff;border-radius:10px;font-weight:800}.flow{padding-left:22px;border-left:2px solid #d9e2f1}.eyebrow{font-size:13px!important;color:var(--accent)!important;font-weight:800;letter-spacing:.08em;text-transform:uppercase;margin-bottom:4px!important}.quick-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:28px 0}.quick-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;color:var(--text)}.quick-card strong{display:block;margin-bottom:5px}.related{margin-top:48px;padding-top:28px;border-top:1px solid var(--line)}.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.related a{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;color:#344054;font-weight:650}.footer{background:#101828;color:#d0d5dd;padding:44px 0}.footer-grid{display:grid;grid-template-columns:1.2fr 2fr;gap:44px}.footer a{color:#e4e7ec}.footer-links{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.footer small{color:#98a2b3}.notfound{text-align:center;padding:100px 20px}.notfound h1{font-size:70px;margin:0}@media(max-width:800px){.nav{height:auto;min-height:64px;flex-wrap:wrap;padding-top:10px;padding-bottom:10px}.navlinks{display:flex;order:3;width:100%;overflow-x:auto;gap:16px;padding:4px 0 2px;white-space:nowrap}.navlinks a{flex:0 0 auto}.official-btn{margin-left:auto}.hero{padding-top:38px}.hero-grid{grid-template-columns:1fr}.hero-card{display:none}.quick-grid,.related-grid{grid-template-columns:1fr}.article{padding-left:4px;padding-right:4px}.footer-grid{grid-template-columns:1fr}.footer-links{grid-template-columns:1fr 1fr}.hero h1{font-size:38px}}@media(max-width:480px){.official-btn{padding:9px 11px;font-size:14px}.wrap{padding:0 16px}.hero h1{font-size:34px}.lead{font-size:17px}.article h2{font-size:22px}.article p{font-size:16px}.footer-links{grid-template-columns:1fr}}