*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    color: #111827;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

button,
input,
select,
textarea {
    font: inherit;
}

a {
    color: inherit;
}

.hidden { display: none !important; }
.block { display: block; }
.flex { display: flex; }
.grid { display: grid; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.flex-1 { flex: 1 1 0%; }
.shrink-0 { flex-shrink: 0; }
.flex-wrap { flex-wrap: wrap; }
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.col-span-full { grid-column: 1 / -1; }
.space-y-6 > :not([hidden]) ~ :not([hidden]) { margin-top: 1.5rem; }

.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }

.w-full { width: 100%; }
.h-48 { height: 12rem; }
.h-full { height: 100%; }
.min-h-screen { min-height: 100vh; }
.max-h-96 { max-height: 24rem; }
.max-w-md { max-width: 28rem; }
.max-w-5xl { max-width: 64rem; }
.max-w-7xl { max-width: 80rem; }
.min-w-\[160px\] { min-width: 160px; }
.min-w-\[200px\] { min-width: 200px; }

.mx-4 { margin-left: 1rem; margin-right: 1rem; }
.mx-auto { margin-left: auto; margin-right: auto; }
.my-4 { margin-top: 1rem; margin-bottom: 1rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.ml-2 { margin-left: 0.5rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.mt-8 { margin-top: 2rem; }

.p-3 { padding: 0.75rem; }
.p-4 { padding: 1rem; }
.p-6 { padding: 1.5rem; }
.p-8 { padding: 2rem; }
.px-2 { padding-left: 0.5rem; padding-right: 0.5rem; }
.px-3 { padding-left: 0.75rem; padding-right: 0.75rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
.py-1 { padding-top: 0.25rem; padding-bottom: 0.25rem; }
.py-1\.5 { padding-top: 0.375rem; padding-bottom: 0.375rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-3 { padding-top: 0.75rem; padding-bottom: 0.75rem; }
.py-8 { padding-top: 2rem; padding-bottom: 2rem; }
.py-12 { padding-top: 3rem; padding-bottom: 3rem; }

.overflow-hidden { overflow: hidden; }
.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.whitespace-pre-wrap { white-space: pre-wrap; }

.rounded { border-radius: 0.25rem; }
.rounded-lg { border-radius: 0.5rem; }
.rounded-t-lg {
    border-top-left-radius: 0.5rem;
    border-top-right-radius: 0.5rem;
}
.rounded-2xl { border-radius: 1rem; }
.rounded-full { border-radius: 9999px; }

.border { border: 1px solid #e5e7eb; }
.border-b { border-bottom: 1px solid #e5e7eb; }
.border-gray-300 { border-color: #d1d5db; }
.border-red-200 { border-color: #fecaca; }
.border-red-600 { border-color: #dc2626; }
.border-slate-200 { border-color: #e2e8f0; }

.bg-white { background-color: #ffffff; }
.bg-gray-50 { background-color: #f9fafb; }
.bg-gray-200 { background-color: #e5e7eb; }
.bg-red-50 { background-color: #fef2f2; }
.bg-slate-50 { background-color: #f8fafc; }
.bg-blue-600 { background-color: #2563eb; }
.bg-red-600 { background-color: #dc2626; }
.bg-black\/50 { background-color: rgba(0, 0, 0, 0.5); }

.text-center { text-align: center; }
.text-xs { font-size: 0.75rem; line-height: 1rem; }
.text-sm { font-size: 0.875rem; line-height: 1.25rem; }
.text-lg { font-size: 1.125rem; line-height: 1.75rem; }
.text-3xl { font-size: 1.875rem; line-height: 2.25rem; }
.text-4xl { font-size: 2.25rem; line-height: 2.5rem; }
.font-medium { font-weight: 500; }
.font-bold { font-weight: 700; }
.text-white { color: #ffffff; }
.text-blue-600 { color: #2563eb; }
.text-emerald-600 { color: #059669; }
.text-red-500 { color: #ef4444; }
.text-red-600 { color: #dc2626; }
.text-red-700 { color: #b91c1c; }
.text-gray-400 { color: #9ca3af; }
.text-gray-500 { color: #6b7280; }
.text-gray-600 { color: #4b5563; }
.text-gray-700 { color: #374151; }
.text-gray-900 { color: #111827; }
.text-slate-400 { color: #94a3b8; }
.text-slate-500 { color: #64748b; }
.text-slate-600 { color: #475569; }
.text-slate-900 { color: #0f172a; }

.opacity-0 { opacity: 0; }

.shadow { box-shadow: 0 1px 3px rgba(15, 23, 42, 0.12), 0 1px 2px rgba(15, 23, 42, 0.08); }
.shadow-lg { box-shadow: 0 12px 28px rgba(15, 23, 42, 0.14), 0 6px 12px rgba(15, 23, 42, 0.08); }
.shadow-xl { box-shadow: 0 20px 40px rgba(15, 23, 42, 0.18), 0 10px 20px rgba(15, 23, 42, 0.1); }

.object-cover {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.object-contain {
    object-fit: contain;
}

.cursor-pointer { cursor: pointer; }

.transition-shadow { transition: box-shadow 0.2s ease; }
.transition-colors {
    transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.transition-opacity { transition: opacity 0.2s ease; }
.duration-200 { transition-duration: 0.2s; }

.line-clamp-2,
.line-clamp-3 {
    display: -webkit-box;
    overflow: hidden;
    -webkit-box-orient: vertical;
}

.line-clamp-2 { -webkit-line-clamp: 2; }
.line-clamp-3 { -webkit-line-clamp: 3; }

.fixed { position: fixed; }
.inset-0 { inset: 0; }
.z-50 { z-index: 50; }

.focus\:outline-none:focus {
    outline: none;
}

.focus\:border-transparent:focus {
    border-color: transparent;
}

.focus\:ring-2:focus {
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.18);
}

.focus\:ring-blue-500:focus {
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.28);
}

.hover\:underline:hover { text-decoration: underline; }
.hover\:bg-gray-100:hover { background-color: #f3f4f6; }
.hover\:bg-slate-100:hover { background-color: #f1f5f9; }
.hover\:bg-red-50:hover { background-color: #fef2f2; }
.hover\:bg-blue-700:hover { background-color: #1d4ed8; }
.hover\:bg-red-700:hover { background-color: #b91c1c; }
.hover\:shadow-lg:hover { box-shadow: 0 12px 28px rgba(15, 23, 42, 0.14), 0 6px 12px rgba(15, 23, 42, 0.08); }

.disabled\:opacity-50:disabled {
    opacity: 0.5;
}

@media (min-width: 768px) {
    .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
    .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}