* { box-sizing: border-box; }
body { margin: 0; font-family: "Microsoft YaHei", "Segoe UI", Arial, sans-serif; }
.min-h-screen { min-height: 100vh; }
.w-full { width: 100%; }
.max-w-screen-2xl { max-width: 1536px; }
.mx-auto { margin-left: auto; margin-right: auto; }
.grid { display: grid; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-1 { gap: 4px; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.gap-5 { gap: 20px; }
.gap-6 { gap: 24px; }
.flex-wrap { flex-wrap: wrap; }
.flex-col { flex-direction: column; }
.p-2 { padding: 8px; }
.p-3 { padding: 12px; }
.p-4 { padding: 16px; }
.p-5 { padding: 20px; }
.p-6 { padding: 24px; }
.px-3 { padding-left: 12px; padding-right: 12px; }
.px-4 { padding-left: 16px; padding-right: 16px; }
.px-5 { padding-left: 20px; padding-right: 20px; }
.py-2 { padding-top: 8px; padding-bottom: 8px; }
.py-3 { padding-top: 12px; padding-bottom: 12px; }
.py-4 { padding-top: 16px; padding-bottom: 16px; }
.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.rounded-lg { border-radius: 8px; }
.rounded-xl { border-radius: 12px; }
.rounded-2xl { border-radius: 16px; }
.rounded-full { border-radius: 9999px; }
.border { border: 1px solid #e2e8f0; }
.border-b { border-bottom: 1px solid #e2e8f0; }
.border-dashed { border-style: dashed; }
.bg-white { background: #fff; }
.bg-slate-50 { background: #f8fafc; }
.bg-slate-100 { background: #f1f5f9; }
.bg-slate-900 { background: #0f172a; }
.bg-teal-600 { background: #0d9488; }
.text-white { color: #fff; }
.text-slate-400 { color: #94a3b8; }
.text-slate-500 { color: #64748b; }
.text-slate-600 { color: #475569; }
.text-slate-700 { color: #334155; }
.text-slate-800 { color: #1e293b; }
.text-slate-900 { color: #0f172a; }
.text-teal-700 { color: #0f766e; }
.text-xs { font-size: 12px; }
.text-sm { font-size: 14px; }
.text-base { font-size: 16px; }
.text-lg { font-size: 18px; }
.text-xl { font-size: 20px; }
.text-2xl { font-size: 24px; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.shadow-sm { box-shadow: 0 1px 2px rgba(15, 23, 42, .06); }
.shadow-lg { box-shadow: 0 16px 40px rgba(15, 23, 42, .12); }
.overflow-auto { overflow: auto; }
.object-contain { object-fit: contain; }
.aspect-video { aspect-ratio: 16 / 9; }
.cursor-pointer { cursor: pointer; }
.col-span-full { grid-column: 1 / -1; }