:root{--red:#C90000;--red2:#A80000;--text:#1F2329;--muted:#5D6673;--soft:#F6F7F9;--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-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.75}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.wrap{width:min(1180px,calc(100% - 32px));margin:auto}.site-header{position:fixed;inset:0 0 auto;z-index:100;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;gap:10px;white-space:nowrap;flex-wrap:nowrap;margin-left:auto}.nav-core a{color:var(--text);background:var(--soft);border-radius:999px;padding:9px 15px;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;background:linear-gradient(180deg,#F12B2B 0%,#C90000 55%,#A80000 100%);color:#fff;border-radius:999px;padding:11px 22px;font-weight:800;box-shadow:0 8px 20px rgba(201,0,0,.2)}.header-register{flex:0 0 auto}.menu-btn{display:none;border:0;background:none;width:40px;padding:8px}.menu-btn span{display:block;height:2px;background:#222;margin:5px 0}.layout{display:grid;grid-template-columns:190px minmax(0,1fr);gap:26px;padding-top:98px}.side-category{position:sticky;top:96px;height:max-content;background:#fff;border:1px solid rgba(201,0,0,.10);border-radius:18px;box-shadow:var(--shadow);padding:15px;max-height:calc(100vh - 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