/* ============================================================
   尚学堂 - 本地 Tailwind CSS 替代 CDN
   包含所有页面使用的 Tailwind 工具类 + 自定义样式
   ============================================================ */

/* === Reset === */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body { min-height: 100vh; line-height: 1.5; -webkit-font-smoothing: antialiased; }
img, video { max-width: 100%; display: block; }
input, textarea, button, select { font: inherit; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* === Layout === */
.mx-auto { margin-left: auto; margin-right: auto; }
.max-w-xs { max-width: 20rem; }
.max-w-2xl { max-width: 42rem; }
.max-w-3xl { max-width: 48rem; }
.max-w-4xl { max-width: 56rem; }
.max-w-5xl { max-width: 64rem; }
.max-w-6xl { max-width: 72rem; }
.max-w-lg { max-width: 32rem; }
.min-h-screen { min-height: 100vh; }

/* === Width === */
.w-full { width: 100%; }
.w-1 { width: 0.25rem; }
.w-5 { width: 1.25rem; }
.w-8 { width: 2rem; }
.w-9 { width: 2.25rem; }
.w-10 { width: 2.5rem; }
.w-11 { width: 2.75rem; }
.w-12 { width: 3rem; }
.w-14 { width: 3.5rem; }
.w-32 { width: 8rem; }
.w-40 { width: 10rem; }
.w-56 { width: 14rem; }

/* === Height === */
.h-5 { height: 1.25rem; }
.h-8 { height: 2rem; }
.h-9 { height: 2.25rem; }
.h-10 { height: 2.5rem; }
.h-11 { height: 2.75rem; }
.h-12 { height: 3rem; }
.h-14 { height: 3.5rem; }
.h-32 { height: 8rem; }
.h-40 { height: 10rem; }
.h-56 { height: 14rem; }
.h-auto { height: auto; }

/* === Padding === */
.p-3 { padding: 0.75rem; }
.p-5 { padding: 1.25rem; }
.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-6 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
.py-8 { padding-top: 2rem; padding-bottom: 2rem; }
.py-12 { padding-top: 3rem; padding-bottom: 3rem; }
.py-16 { padding-top: 4rem; padding-bottom: 4rem; }
.py-20 { padding-top: 5rem; padding-bottom: 5rem; }
.py-24 { padding-top: 6rem; padding-bottom: 6rem; }
.pb-4 { padding-bottom: 1rem; }
.pb-8 { padding-bottom: 2rem; }
.pb-10 { padding-bottom: 2.5rem; }
.pb-16 { padding-bottom: 4rem; }
.pt-14 { padding-top: 3.5rem; }

/* === Margin === */
.mb-1 { margin-bottom: 0.25rem; }
.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-10 { margin-bottom: 2.5rem; }
.mb-12 { margin-bottom: 3rem; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }
.ml-auto { margin-left: auto; }
.my-4 { margin-top: 1rem; margin-bottom: 1rem; }
.my-6 { margin-top: 1.5rem; margin-bottom: 1.5rem; }

/* === Flexbox === */
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.flex-shrink-0 { flex-shrink: 0; }
.shrink-0 { flex-shrink: 0; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.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; }
.space-y-1 > * + * { margin-top: 0.25rem; }
.space-y-2 > * + * { margin-top: 0.5rem; }
.space-y-3 > * + * { margin-top: 0.75rem; }
.space-y-4 > * + * { margin-top: 1rem; }
.space-y-12 > * + * { margin-top: 3rem; }

/* === Grid === */
.grid { display: grid; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }

/* === Display === */
.block { display: block; }
.inline-block { display: inline-block; }
.hidden { display: none; }

/* === Position === */
.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; }
.z-10 { z-index: 10; }
.z-50 { z-index: 50; }

/* === Overflow === */
.overflow-hidden { overflow: hidden; }

/* === Rounded === */
.rounded { border-radius: 0.25rem; }
.rounded-lg { border-radius: 0.5rem; }
.rounded-xl { border-radius: 0.75rem; }
.rounded-full { border-radius: 9999px; }

/* === Shadow === */
.shadow { box-shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06); }
.shadow-sm { box-shadow: 0 1px 2px 0 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-lg { box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05); }
.shadow-2xl { box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25); }

/* === Opacity === */
.opacity-60 { opacity: 0.6; }
.opacity-90 { opacity: 0.9; }

/* === Text === */
.text-xs { font-size: 0.75rem; }
.text-sm { font-size: 0.875rem; }
.text-base { font-size: 1rem; }
.text-lg { font-size: 1.125rem; }
.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-8xl { font-size: 6rem; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.text-center { text-align: center; }
.leading-relaxed { line-height: 1.625; }
.tracking-wider { letter-spacing: 0.05em; }
.tracking-widest { letter-spacing: 0.1em; }
.whitespace-nowrap { white-space: nowrap; }
.cursor-pointer { cursor: pointer; }
.outline-none { outline: none; }
.resize-none { resize: none; }

/* === Background === */
.bg-white { background-color: #ffffff; }
.bg-\[\#2a2a2a\] { background-color: #2a2a2a; }
.bg-\[\#6b8e7f\] { background-color: #6b8e7f; }
.bg-\[\#6b8e7f10\] { background-color: rgba(107, 142, 127, 0.063); }
.bg-\[\#8a8580\] { background-color: #8a8580; }
.bg-\[\#b8312f\] { background-color: #b8312f; }
.bg-\[\#b8312f10\] { background-color: rgba(184, 49, 47, 0.063); }
.bg-\[\#faf8f3\] { background-color: #faf8f3; }
.bg-gradient-to-b { background-image: linear-gradient(to bottom, var(--tw-gradient-from, transparent), var(--tw-gradient-to, transparent)); }

/* === Text Color === */
.text-\[\#2a2a2a\] { color: #2a2a2a; }
.text-\[\#4a7c8b\] { color: #4a7c8b; }
.text-\[\#5a4a3a\] { color: #5a4a3a; }
.text-\[\#6b8e7f\] { color: #6b8e7f; }
.text-\[\#7a6a5a\] { color: #7a6a5a; }
.text-\[\#8a8580\] { color: #8a8580; }
.text-\[\#8b5e3c\] { color: #8b5e3c; }
.text-\[\#8b6e4e\] { color: #8b6e4e; }
.text-\[\#b8312f\] { color: #b8312f; }
.text-\[\#c76a4a\] { color: #c76a4a; }
.text-\[\#d4c5b0\] { color: #d4c5b0; }
.text-\[\#faf8f3\] { color: #faf8f3; }

/* === Border === */
.border { border-width: 1px; }
.border-t { border-top-width: 1px; }
.border-4 { border-width: 4px; }
.border-gray-200 { border-color: #e5e7eb; }
.border-\[\#2a2a2a10\] { border-color: rgba(42, 42, 42, 0.063); }
.border-\[\#b8312f\] { border-color: #b8312f; }
.border-\[\#faf8f3\] { border-color: #faf8f3; }
.border-opacity-20 { --tw-border-opacity: 0.2; }

/* === Object === */
.object-cover { object-fit: cover; }
.object-contain { object-fit: contain; }

/* === Gradient Stops === */
.from-transparent { --tw-gradient-from: transparent; }
.from-\[\#2a2a2a08\] { --tw-gradient-from: rgba(42, 42, 42, 0.031); }
.from-\[\#6b8e7f08\] { --tw-gradient-from: rgba(107, 142, 127, 0.031); }
.to-transparent { --tw-gradient-to: transparent; }
.via-\[\#f0ebe008\] { --tw-gradient-via: rgba(240, 235, 224, 0.031); }

/* === Tracking === */
.tracking-\[0\.3em\] { letter-spacing: 0.3em; }

/* === Aspect === */
.aspect-\[3\/4\] { aspect-ratio: 3/4; }

/* === Columns (masonry) === */
.columns-2 { columns: 2; }
.md\:columns-3 { columns: 3; }
.break-inside-avoid { break-inside: avoid; }

/* === Hover === */
.hover\:shadow-lg:hover { box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05); }
.hover\:shadow-xl:hover { box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04); }
.hover\:text-\[\#faf8f3\]:hover { color: #faf8f3; }
.hover\:bg-\[\#a02a28\]:hover { background-color: #a02a28; }

/* === Focus === */
.focus\:border-\[\#b8312f\]:focus { border-color: #b8312f; }
.focus\:ring-1:focus { box-shadow: 0 0 0 1px var(--tw-ring-color, #b8312f); }
.focus\:ring-\[\#b8312f\]:focus { --tw-ring-color: #b8312f; }

/* === Responsive: md (768px+) === */
@media (min-width: 768px) {
  .md\:flex { display: flex; }
  .md\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .md\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
  .md\:grid-cols-5 { grid-template-columns: repeat(5, 1fr); }
  .md\:columns-3 { columns: 3; }
  .md\:w-1\/3 { width: 33.333%; }
  .md\:w-2\/3 { width: 66.667%; }
  .md\:pt-16 { padding-top: 4rem; }
  .md\:text-5xl { font-size: 3rem; }
}

/* === Transition === */
.transition { transition-property: all; transition-duration: 0.15s; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); }