:root{--bg:#F5F1E8;--header:#FFFDF8;--hero:#E8F4EF;--btn:#116B5A;--btnText:#fff;--btn2:#FFFDF8;--title:#17352F;--text:#435B55;--accent:#D67B35;--card:#fff;--border:#D7E1DC;--footer:#17352F;--footerText:#E9F2EF}
*{box-sizing:border-box}body{margin:0;font-family:Arial,"Microsoft YaHei","PingFang SC","Helvetica Neue",sans-serif;background:var(--bg);color:var(--text);line-height:1.82;overflow-x:hidden}img{max-width:100%;height:auto;object-fit:contain;display:block}a{text-decoration:none;color:inherit}.wrap{width:min(1180px,calc(100% - 40px));margin:0 auto}.site-header{background:var(--header);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:20}.nav{display:flex;align-items:center;gap:18px;min-height:74px}.brand img{display:block;width:auto;height:38px;max-width:180px;max-height:42px;object-fit:contain;flex-shrink:0}.menu{display:flex;gap:22px;margin-left:auto}.menu-toggle{display:none}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 18px;border-radius:999px;font-weight:700;border:1px solid transparent}.btn-primary{background:var(--btn);color:var(--btnText)}.btn-secondary{background:var(--btn2);color:var(--btn);border-color:var(--btn)}.hero{padding:50px 0 24px}.hero-box{background:var(--hero);padding:42px;border-radius:36px;text-align:center}.tag{display:inline-flex;padding:8px 12px;border-radius:999px;background:#fff;color:var(--accent);font-size:13px}.hero h1,.section h2{margin:14px 0;color:var(--title);line-height:1.15}.hero h1{font-size:clamp(34px,4.6vw,58px)}.actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin:22px 0}.hero-image{margin:16px auto 0;max-width:860px}.hero-image img{max-height:460px;margin:0 auto}.section{padding:58px 0}.light{background:#FFFDF8}.device-cascade{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;align-items:start}.device-card{background:var(--card);border:1px solid var(--border);border-radius:24px;padding:22px;box-shadow:0 12px 28px rgba(23,53,47,.07)}.device-card.up{transform:translateY(-14px)}.device-card.down{transform:translateY(14px)}.text-link{display:inline-block;margin-top:8px;color:var(--btn);text-decoration:underline}.paths{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.paths div{background:#fff;border:1px solid var(--border);border-radius:20px;padding:20px}.paths span{display:block;margin-top:8px}.check-table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--border);border-radius:18px;overflow:hidden}.check-table th,.check-table td{padding:16px;border-bottom:1px solid var(--border);text-align:left}.check-table thead{background:#EEF4F1;color:var(--title)}.qa-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.qa-grid div{background:#fff;border:1px solid var(--border);border-radius:22px;padding:24px}.wide{margin-top:20px}.site-footer{background:var(--footer);color:var(--footerText);padding:24px 0 90px}.footer-line{display:flex;align-items:center;gap:24px;flex-wrap:wrap}.mobile-bar{display:none}
@media (max-width:1024px){.device-cascade,.paths,.qa-grid{grid-template-columns:1fr}.device-card.up,.device-card.down{transform:none}.menu{display:none}.menu-toggle{display:inline-flex;margin-left:auto;border:1px solid var(--border);background:#fff;border-radius:999px;height:40px;padding:0 14px}}
@media (max-width:768px){.wrap{width:min(100% - 28px,1180px)}.hero-box{padding:28px 20px}.actions{flex-direction:column}.btn{width:100%}.hero-image img{max-height:300px}.check-table,.check-table thead,.check-table tbody,.check-table tr,.check-table td,.check-table th{display:block;width:100%}.check-table tr{border-bottom:1px solid var(--border)}.check-table thead{display:none}.check-table td{padding:12px 16px}.menu.open{display:flex;position:absolute;left:14px;right:14px;top:68px;background:#fff;border:1px solid var(--border);border-radius:18px;padding:14px;flex-direction:column}.mobile-bar{display:flex;position:fixed;left:0;right:0;bottom:0;background:#fff;padding:10px 14px;border-top:1px solid var(--border);min-height:64px}body{padding-bottom:78px}}
@media (max-width:520px){.footer-line{align-items:flex-start;flex-direction:column}}

.site-brand,.brand{display:inline-flex;align-items:center;gap:12px;flex-shrink:0;min-width:max-content}
.site-logo,.brand img{display:block;width:auto;height:38px;max-width:180px;max-height:42px;object-fit:contain;flex-shrink:0}
@media (max-width:768px){.site-logo,.brand img{width:auto;height:32px;max-width:150px}}