:root{--red:#C90000;--red2:#A80000;--text:#1F2329;--muted:#5D6673;--light:#F6F7F9;--section:#F1F3F6;--line:rgba(201,0,0,.12);--shadow:0 12px 30px rgba(18,28,45,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:var(--text);font:16px/1.75 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.container{width:min(1180px,calc(100% - 32px));margin:auto}.site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid rgba(201,0,0,.08)}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:74px}.logo{flex:0 0 auto}.logo img{max-height:52px;width:auto}.nav-core{display:flex;align-items:center;justify-content:center;gap:10px;white-space:nowrap;flex-wrap:nowrap;min-width:0}.nav-core a{color:var(--text);background:var(--light);border-radius:999px;padding:9px 16px;font-weight:700}.nav-core a:hover,.nav-core a.active{color:var(--red);background:rgba(201,0,0,.08)}.main-btn{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:999px;padding:11px 24px;background:linear-gradient(180deg,#F12B2B 0%,#C90000 55%,#A80000 100%);color:#fff;font-weight:800;box-shadow:0 8px 18px rgba(201,0,0,.2)}.header-register{flex:0 0 auto}.menu-toggle{display:none;background:transparent;border:0;padding:8px}.menu-toggle span{display:block;width:23px;height:2px;background:#20242a;margin:5px 0}.page-shell{display:grid;grid-template-columns:190px minmax(0,1fr);gap:26px;padding-top:24px;padding-bottom:50px}.side-category{position:sticky;top:96px;align-self:start;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:12px;max-height:calc(100vh - 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