:root {
    --site-font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", system-ui, sans-serif;
    --site-font-mono: "SFMono-Regular", "Consolas", "Liberation Mono", monospace;
}

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

html {
    line-height: 1.5;
    -webkit-text-size-adjust: 100%;
    tab-size: 4;
    font-family: var(--site-font-sans);
}

body {
    margin: 0;
    font-family: var(--site-font-sans);
}

img,
svg {
    display: block;
}

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

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

.absolute { position: absolute; }
.relative { position: relative; }
.fixed { position: fixed; }
.inset-0 { inset: 0; }
.top-0 { top: 0; }
.top-16 { top: 4rem; }
.top-3\.5 { top: 0.875rem; }
.right-0 { right: 0; }
.left-4 { left: 1rem; }
.z-10 { z-index: 10; }
.z-50 { z-index: 50; }

.block { display: block; }
.hidden { display: none; }
.inline-block { display: inline-block; }
.inline-flex { display: inline-flex; }
.flex { display: flex; }
.grid { display: grid; }
.flex-1 { flex: 1 1 0%; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }
.flex-grow { flex-grow: 1; }
.flex-grow-0 { flex-grow: 0; }
.flex-shrink { flex-shrink: 1; }
.flex-shrink-0 { flex-shrink: 0; }
.items-center { align-items: center; }
.items-baseline { align-items: baseline; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }

.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }
.gap-12 { gap: 3rem; }
.space-y-3 > :not([hidden]) ~ :not([hidden]) { margin-top: 0.75rem; }
.space-y-6 > :not([hidden]) ~ :not([hidden]) { margin-top: 1.5rem; }
.space-x-4 > :not([hidden]) ~ :not([hidden]) { margin-left: 1rem; }
.space-x-8 > :not([hidden]) ~ :not([hidden]) { margin-left: 2rem; }

.mx-auto { margin-left: auto; margin-right: auto; }
.ml-10 { margin-left: 2.5rem; }
.mr-2 { margin-right: 0.5rem; }
.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; }
.mb-12 { margin-bottom: 3rem; }
.mt-8 { margin-top: 2rem; }
.mt-12 { margin-top: 3rem; }
.mt-auto { margin-top: auto; }

.w-4 { width: 1rem; }
.w-5 { width: 1.25rem; }
.w-6 { width: 1.5rem; }
.w-12 { width: 3rem; }
.w-48 { width: 12rem; }
.w-64 { width: 16rem; }
.w-auto { width: auto; }
.w-full { width: 100%; }
.max-w-md { max-width: 28rem; }
.max-w-2xl { max-width: 42rem; }
.max-w-3xl { max-width: 48rem; }
.max-w-4xl { max-width: 56rem; }
.max-w-6xl { max-width: 72rem; }
.max-w-7xl { max-width: 80rem; }
.max-w-none { max-width: none; }
.max-w-\[140px\] { max-width: 140px; }
.max-w-\[80\%\] { max-width: 80%; }
.min-w-\[40px\] { min-width: 40px; }

.h-4 { height: 1rem; }
.h-5 { height: 1.25rem; }
.h-6 { height: 1.5rem; }
.h-12 { height: 3rem; }
.h-16 { height: 4rem; }
.h-20 { height: 5rem; }
.h-48 { height: 12rem; }
.h-auto { height: auto; }
.h-full { height: 100%; }
.h-screen { height: 100vh; }
.h-\[28px\] { height: 28px; }
.max-h-\[60\%\] { max-height: 60%; }

.overflow-hidden { overflow: hidden; }
.object-cover { object-fit: cover; }
.object-contain { object-fit: contain; }
.resize-none { resize: none; }
.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.whitespace-nowrap { white-space: nowrap; }
.line-clamp-3 {
    overflow: hidden;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
}

.rounded { border-radius: 0.25rem; }
.rounded-md { border-radius: 0.375rem; }
.rounded-lg { border-radius: 0.5rem; }
.rounded-full { border-radius: 9999px; }

.border { border-width: 1px; border-style: solid; }
.border-b { border-bottom-width: 1px; border-bottom-style: solid; }
.border-l { border-left-width: 1px; border-left-style: solid; }
.border-t { border-top-width: 1px; border-top-style: solid; }
.border-gray-700 { border-color: #374151; }
.border-gray-800 { border-color: #1f2937; }
.border-accent-color { border-color: var(--accent-color); }

.bg-gray-700 { background-color: #374151; }
.bg-gray-800\/30 { background-color: rgba(31, 41, 55, 0.3); }
.bg-gray-800\/50 { background-color: rgba(31, 41, 55, 0.5); }
.bg-gray-900 { background-color: #111827; }
.bg-gray-900\/30 { background-color: rgba(17, 24, 39, 0.3); }
.bg-gray-900\/90 { background-color: rgba(17, 24, 39, 0.9); }
.bg-gray-900\/95 { background-color: rgba(17, 24, 39, 0.95); }
.bg-accent-color { background-color: var(--accent-color); }
.bg-accent-color\/20 { background-color: rgba(94, 139, 126, 0.2); }
.bg-primary-color\/20 { background-color: rgba(74, 108, 140, 0.2); }
.bg-secondary-color\/20 { background-color: rgba(141, 153, 174, 0.2); }

.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-xl { font-size: 1.25rem; line-height: 1.75rem; }
.text-2xl { font-size: 1.5rem; line-height: 2rem; }
.text-3xl { font-size: 1.875rem; line-height: 2.25rem; }
.text-4xl { font-size: 2.25rem; line-height: 2.5rem; }
.text-white { color: #ffffff; }
.text-gray-300 { color: #d1d5db; }
.text-gray-400 { color: #9ca3af; }
.text-gray-500 { color: #6b7280; }
.text-gray-600 { color: #4b5563; }
.text-accent-color { color: var(--accent-color); }
.text-primary-color { color: var(--primary-color); }
.text-secondary-color { color: var(--secondary-color); }

.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.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; }
.px-8 { padding-left: 2rem; padding-right: 2rem; }
.py-1 { padding-top: 0.25rem; padding-bottom: 0.25rem; }
.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-16 { padding-top: 4rem; padding-bottom: 4rem; }
.pt-8 { padding-top: 2rem; }
.pt-24 { padding-top: 6rem; }
.pt-32 { padding-top: 8rem; }
.pb-8 { padding-bottom: 2rem; }
.pb-12 { padding-bottom: 3rem; }
.pb-16 { padding-bottom: 4rem; }
.pl-12 { padding-left: 3rem; }
.pr-2 { padding-right: 0.5rem; }

.opacity-25 { opacity: 0.25; }
.opacity-75 { opacity: 0.75; }
.shadow-lg { box-shadow: 0 10px 25px rgba(0, 0, 0, 0.35); }
.backdrop-blur-sm { backdrop-filter: blur(6px); }

.transition-all { transition: all 0.3s ease; }
.transition-colors { transition: color 0.3s ease, background-color 0.3s ease, border-color 0.3s ease; }
.transition-transform { transition: transform 0.3s ease; }
.duration-300 { transition-duration: 0.3s; }
.cursor-pointer { cursor: pointer; }
.cursor-default { cursor: default; }

.hover\:text-accent-color:hover { color: var(--accent-color); }
.hover\:text-white:hover { color: #ffffff; }
.hover\:border-accent-color:hover { border-color: var(--accent-color); }
.hover\:bg-accent-color:hover { background-color: var(--accent-color); }
.hover\:bg-opacity-80:hover { opacity: 0.8; }

.group:hover .group-hover\:-translate-y-1 { transform: translateY(-0.25rem); }
.group:hover .group-hover\:scale-105 { transform: scale(1.05); }

.aspect-video {
    aspect-ratio: 16 / 9;
}

.animate-spin {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.prose p,
.prose li,
.prose blockquote {
    max-width: 65ch;
}

.article-content img {
    height: auto;
}

@media (min-width: 640px) {
    .sm\:px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
    .sm\:flex-row { flex-direction: row; }
    .sm\:mb-0 { margin-bottom: 0; }
}

@media (min-width: 768px) {
    .md\:block { display: block; }
    .md\:hidden { display: none; }
    .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\:text-2xl { font-size: 1.5rem; line-height: 2rem; }
    .md\:text-4xl { font-size: 2.25rem; line-height: 2.5rem; }
    .md\:text-5xl { font-size: 3rem; line-height: 1; }
    .md\:text-6xl { font-size: 3.75rem; line-height: 1; }
}

@media (min-width: 1024px) {
    .lg\:block { display: block; }
    .lg\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .lg\:px-8 { padding-left: 2rem; padding-right: 2rem; }
}