:root{
    --bg:#ffffff;--bg2:#fafafa;--bg3:#f5f5f5;
    --primary:#E20113;--primary-light:#FF1D29;--primary-50:#FFF1F2;--primary-100:#FFE4E6;--primary-200:#FECACA;
    --accent:#D10522;--accent-light:#E0031E;--accent-50:#FFF5F5;
    --red:#E20113;--red-light:#FF1D29;--red-50:#FFF1F2;
    --gray-50:#f9fafb;--gray-100:#f3f4f6;--gray-200:#e5e7eb;--gray-300:#d1d5db;
    --gray-400:#9ca3af;--gray-500:#6b7280;--gray-600:#4b5563;--gray-700:#374151;--gray-800:#1f2937;--gray-900:#111827;
    --text:#1e293b;--text2:#475569;--text3:#94a3b8;
    --glass:rgba(255,255,255,.7);--glass-b:rgba(226,1,19,.06);
    --shadow:0 1px 3px rgba(0,0,0,.06);--shadow-lg:0 8px 30px rgba(226,1,19,.06);--shadow-xl:0 16px 48px rgba(226,1,19,.08);
    --tr:all .4s cubic-bezier(.25,.8,.25,1);
}
body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
    background: var(--deep);
    color: var(--text);
    overflow-x: hidden;
    line-height: 1.6;
}
/* Navbar */

.navbar{position:fixed;top:0;left:0;right:0;z-index:1000;padding:16px 0;transition:var(--tr);background: #ffffff}
.navbar.scrolled{background:rgba(255,255,255,.88);backdrop-filter:blur(20px) saturate(1.4);border-bottom:1px solid rgba(226,1,19,.06);padding:10px 0;box-shadow:0 1px 12px rgba(0,0,0,.04)}
.navbar .container{display:flex;align-items:center;justify-content:space-between}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{padding:8px 18px;font-size:13px;font-weight:500;color:var(--text2);border-radius:8px;transition:var(--tr);letter-spacing:.3px}
.nav-links a:hover,.nav-links a.active{color:var(--primary);background:var(--primary-50)}
.nav-links a.active{font-weight:600}

.nav-brand{display:flex;align-items:center;gap:12px}
.nav-brand .brand-mark{width:40px;height:40px;border-radius:10px;overflow:hidden;flex-shrink:0}
.nav-brand .brand-mark img{width:100%;height:100%;object-fit:cover;border-radius:10px}
.nav-brand .brand-text{font-size:18px;font-weight:700;color:var(--gray-900)}
.nav-brand .brand-sub{font-size:10px;color:var(--text3);letter-spacing:2px;margin-top:-2px;font-weight: normal}