* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.pt-24 { padding-top: 6rem; }
.pt-4 { padding-top: 1rem; }
.pt-2 { padding-top: 0.5rem; }
.py-16 { padding-top: 4rem; padding-bottom: 4rem; }
.py-8 { padding-top: 2rem; padding-bottom: 2rem; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-1\.5 { padding-top: 0.375rem; padding-bottom: 0.375rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
.px-8 { padding-left: 2rem; padding-right: 2rem; }
.mx-auto { margin-left: auto; margin-right: auto; }
.mb-4 { margin-bottom: 1rem; }
.mb-8 { margin-bottom: 2rem; }
.mb-12 { margin-bottom: 3rem; }
.ml-1 { margin-left: 0.25rem; }
.ml-4 { margin-left: 1rem; }
.mt-1 { margin-top: 0.25rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }
.gap-10 { gap: 2.5rem; }
.gap-12 { gap: 3rem; }

.w-full { width: 100%; }
.w-10 { width: 2.5rem; }
.w-12 { width: 3rem; }
.w-16 { width: 4rem; }
.w-20 { width: 5rem; }
.w-56 { width: 14rem; }
.w-8 { width: 2rem; }
.w-3 { width: 0.75rem; }
.w-12 { width: 3rem; }
.max-w-7xl { max-width: 80rem; }
.max-w-6xl { max-width: 72rem; }

.h-full { height: 100%; }
.h-10 { height: 2.5rem; }
.h-12 { height: 3rem; }
.h-16 { height: 4rem; }
.h-48 { height: 12rem; }
.h-36 { height: 9rem; }
.h-80 { height: 20rem; }
.h-96 { height: 24rem; }
.h-1 { height: 0.25rem; }
.h-3 { height: 0.75rem; }
.h-\[500px\] { height: 500px; }
.min-w-\[120px\] { min-width: 120px; }
.min-w-\[140px\] { min-width: 140px; }

.top-1\/2 { top: 50%; }
.left-1\/2 { left: 50%; }
.-translate-y-1\/2 { transform: translateY(-50%); }
.-translate-x-1\/2 { transform: translateX(-50%); }

.flex { display: flex; }
.block { display: block; }
.hidden { display: none; }
.inline-block { display: inline-block; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }
.flex-wrap { flex-wrap: wrap; }

.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.inset-0 { top: 0; right: 0; bottom: 0; left: 0; }
.top-0 { top: 0; }
.left-0 { left: 0; }
.right-0 { right: 0; }
.bottom-0 { bottom: 0; }
.left-4 { left: 1rem; }
.right-4 { right: 1rem; }
.bottom-6 { bottom: 1.5rem; }
.bottom-8 { bottom: 2rem; }
.top-full { top: 100%; }
.left-6 { left: 1.5rem; }
.right-6 { right: 1.5rem; }

.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-30 { z-index: 30; }
.z-50 { z-index: 50; }

.bg-white { background-color: #ffffff; }
.bg-red-500 { background-color: #ef4444; }
.bg-red-600 { background-color: #dc2626; }
.bg-red-700 { background-color: #E8E8E8; }
.bg-gray-50 { background-color: #f9fafb; }
.bg-gray-100 { background-color: #f3f4f6; }
.bg-gray-200 { background-color: #e5e7eb; }
.bg-gray-300 { background-color: #d1d5db; }
.bg-gray-800 { background-color: #1f2937; }
.bg-gray-900 { background-color: #111827; }
.bg-black\/60 { background-color: rgba(0, 0, 0, 0.6); }
.bg-black\/70 { background-color: rgba(0, 0, 0, 0.7); }
.bg-black\/50 { background-color: rgba(0, 0, 0, 0.5); }
.bg-black\/40 { background-color: rgba(0, 0, 0, 0.4); }
.bg-white\/20 { background-color: rgba(255, 255, 255, 0.2); }
.bg-white\/40 { background-color: rgba(255, 255, 255, 0.4); }
.bg-white\/50 { background-color: rgba(255, 255, 255, 0.5); }
.bg-red-50 { background-color: #fef2f2; }
.bg-purple-600 { background-color: #9333ea; }
.bg-green-600 { background-color: #16a34a; }
.bg-orange-500 { background-color: #f97316; }

.border { border-width: 1px; }
.border-b-4 { border-bottom-width: 4px; }
.border-t { border-top-width: 1px; }
.border-gray-100 { border-color: #f3f4f6; }
.border-gray-200 { border-color: #e5e7eb; }
.border-gray-300 { border-color: #d1d5db; }
.border-red-500 { border-color: #ef4444; }
.border-red-700 { border-color: #b91c1c; }

.text-white { color: #ffffff; }
.text-gray-400 { color: #9ca3af; }
.text-gray-500 { color: #6b7280; }
.text-gray-600 { color: #4b5563; }
.text-gray-700 { color: #374151; }
.text-gray-800 { color: #1f2937; }
.text-gray-900 { color: #111827; }
.text-red-600 { color: #dc2626; }
.text-red-700 { color: #b91c1c; }

.text-xs { font-size: 0.75rem; }
.text-sm { font-size: 0.875rem; }
.text-base { font-size: 1rem; }
.text-lg { font-size: 2rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }
.text-3xl { font-size: 1.875rem; }
.text-4xl { font-size: 2.25rem; }
.text-5xl { font-size: 3rem; }
.text-6xl { font-size: 3.75rem; }
.text-7xl { font-size: 4.5rem; }

.font-bold { font-weight: 700; }
.font-medium { font-weight: 500; }
.font-normal { font-weight: 400; }

.italic { font-style: italic; }
.underline { text-decoration: underline; }

.rounded { border-radius: 0.25rem; }
.rounded-full { border-radius: 9999px; }
.rounded-lg { border-radius: 0.5rem; }
.rounded-xl { border-radius: 0.75rem; }
.rounded-2xl { border-radius: 1rem; }

.shadow-lg { box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05); }
.shadow-md { box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06); }
.shadow-sm { box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05); }

.object-cover { object-fit: cover; }
.object-center { object-position: center; }

.overflow-hidden { overflow: hidden; }
.overflow-visible { overflow: visible; }

.cursor-pointer { cursor: pointer; }

.transition-colors { transition-property: color, background-color, border-color; transition-duration: 200ms; }
.transition-all { transition-property: all; transition-duration: 200ms; }
.backdrop-blur-sm { backdrop-filter: blur(4px); }

.hover\:bg-red-600:hover { background-color: #dc2626; }
.hover\:bg-red-700:hover { background-color: #b91c1c; }
.hover\:bg-red-800:hover { background-color: #991b1b; }
.hover\:bg-gray-200:hover { background-color: #e5e7eb; }
.hover\:bg-gray-50:hover { background-color: #f9fafb; }
.hover\:bg-white\/40:hover { background-color: rgba(255, 255, 255, 0.4); }
.hover\:bg-white\/80:hover { background-color: rgba(255, 255, 255, 0.8); }
.hover\:underline:hover { text-decoration: underline; }

.focus\:outline-none:focus { outline: none; }
.focus\:border-red-500:focus { border-color: #ef4444; }

.bg-gradient-to-r { background-image: linear-gradient(to right, var(--tw-gradient-from), var(--tw-gradient-via), var(--tw-gradient-to)); }
.bg-gradient-to-b { background-image: linear-gradient(to bottom, var(--tw-gradient-from), var(--tw-gradient-to)); }
.from-black\/70 { --tw-gradient-from: rgba(0, 0, 0, 0.7); }
.from-red-600 { --tw-gradient-from: #dc2626; }
.from-black\/60 { --tw-gradient-from: rgba(0, 0, 0, 0.6); }
.via-black\/50 { --tw-gradient-via: rgba(0, 0, 0, 0.5); }
.via-transparent { --tw-gradient-via: transparent; }
.to-black\/60 { --tw-gradient-to: rgba(0, 0, 0, 0.6); }
.to-black\/50 { --tw-gradient-to: rgba(0, 0, 0, 0.5); }
.to-black\/40 { --tw-gradient-to: rgba(0, 0, 0, 0.4); }
.to-orange-500 { --tw-gradient-to: #f97316; }

.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.leading-relaxed { line-height: 1.625; }
.leading-tight { line-height: 1.25; }

.space-y-1 > :not([hidden]) ~ :not([hidden]) { margin-top: 0.25rem; }
.space-y-2 > :not([hidden]) ~ :not([hidden]) { margin-top: 0.5rem; }
.space-y-4 > :not([hidden]) ~ :not([hidden]) { margin-top: 1rem; }
.space-y-6 > :not([hidden]) ~ :not([hidden]) { margin-top: 1.5rem; }

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

.transform { transform: var(--tw-transform); }
.group-hover\:scale-105:hover { --tw-scale-x: 1.05; --tw-scale-y: 1.05; }
.group-hover\:scale-110:hover { --tw-scale-x: 1.1; --tw-scale-y: 1.1; }
.group-hover\:scale-[1.02]:hover { --tw-scale-x: 1.02; --tw-scale-y: 1.02; }
.group-hover\:-translate-y-2:hover { --tw-translate-y: -0.5rem; }
.-translate-y-1 { --tw-translate-y: -0.25rem; }
.scale-105 { --tw-scale-x: 1.05; --tw-scale-y: 1.05; }
.scale-110 { --tw-scale-x: 1.1; --tw-scale-y: 1.1; }

.transition-transform { transition-property: transform; transition-duration: 200ms; }
.duration-300 { transition-duration: 300ms; }
.duration-500 { transition-duration: 500ms; }

.animate-pulse { animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }

.text-shadow-lg { text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3); }

nav.bg-red-600 li {
    position: relative;
    list-style: none;
}

nav.bg-red-600 li ul {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 140px;
    background: #fff;
    list-style: none;
    padding: 0;
    margin: 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    z-index: 9999;
    display: none;
}

nav.bg-red-600 li:hover ul {
    display: block;
}

nav.bg-red-600 li ul li {
    border-bottom: 1px solid #f3f4f6;
}

nav.bg-red-600 li ul li:last-child {
    border-bottom: none;
}

nav.bg-red-600 li ul li a {
    display: block;
    padding: 10px 15px;
    color: #333;
    font-size: 13px;
    text-decoration: none;
}

nav.bg-red-600 li ul li a:hover {
    background-color: #f5f5f5;
}

@media (min-width: 768px) {
    .md\:text-2xl { font-size: 1.5rem; }
    .md\:text-4xl { font-size: 2.25rem; }
    .md\:text-6xl { font-size: 3.75rem; }
    .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .md\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .md\:h-80 { height: 20rem; }
    .md\:h-96 { height: 24rem; }
    .md\:p-8 { padding: 2rem; }
    .md\:p-12 { padding: 3rem; }
}

@media (min-width: 1024px) {
    .lg\:hidden { display: none; }
    .lg\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

.dropdown:hover .dropdown-menu {
    display: block !important;
}

.slider-item {
    transition: opacity 0.5s ease-in-out;
}

.video-card .play-btn {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.video-card:hover .play-btn {
    opacity: 1;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2rem;
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.section-title .divider {
    width: 60px;
    height: 3px;
    background-color: #dc2626;
    margin: 0 auto;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 9999px;
    font-weight: 500;
    transition: background-color 0.2s, color 0.2s;
    cursor: pointer;
    border: none;
}

.btn-red {
    background-color: #dc2626;
    color: white;
}

.btn-red:hover {
    background-color: #b91c1c;
}

.btn-outline {
    border: 1px solid #dc2626;
    color: #dc2626;
    background-color: transparent;
}

.btn-outline:hover {
    background-color: #dc2626;
    color: white;
}

.card {
    background-color: white;
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
}

.footer {
    background-color: #1f2937;
    color: white;
    padding: 3rem 0;
}

.footer a {
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.2s;
}

.footer a:hover {
    color: white;
}