/* 基础样式 */
:root {
  --violet-50: #f5f3ff;
  --violet-100: #ede9fe;
  --violet-200: #ddd6fe;
  --violet-500: #8b5cf6;
  --violet-600: #7c3aed;
  --violet-700: #6d28d9;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --white: #ffffff;
  --black: #000000;
}

/* 基本样式重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  color: var(--gray-800);
}

/* 排版 */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
}

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

/* 实用工具类 */
.min-h-screen {
  min-height: 100vh;
}

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.items-start {
  align-items: flex-start;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

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

.gap-2 {
  gap: 0.5rem;
}

.gap-6 {
  gap: 1.5rem;
}

.gap-8 {
  gap: 2rem;
}

.mt-4 {
  margin-top: 1rem;
}

.mt-12 {
  margin-top: 3rem;
}

.mb-2 {
  margin-bottom: 0.5rem;
}

.mb-3 {
  margin-bottom: 0.75rem;
}

.mb-4 {
  margin-bottom: 1rem;
}

.mb-8 {
  margin-bottom: 2rem;
}

.mb-10 {
  margin-bottom: 2.5rem;
}

.mb-16 {
  margin-bottom: 4rem;
}

.my-8 {
  margin-top: 2rem;
  margin-bottom: 2rem;
}

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

.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-3 {
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}

.py-4 {
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.py-8 {
  padding-top: 2rem;
  padding-bottom: 2rem;
}

.py-12 {
  padding-top: 3rem;
  padding-bottom: 3rem;
}

.py-16 {
  padding-top: 4rem;
  padding-bottom: 4rem;
}

.p-6 {
  padding: 1.5rem;
}

.w-5 {
  width: 1.25rem;
}

.w-6 {
  width: 1.5rem;
}

.w-10 {
  width: 2.5rem;
}

.w-12 {
  width: 3rem;
}

.w-full {
  width: 100%;
}

.h-5 {
  height: 1.25rem;
}

.h-6 {
  height: 1.5rem;
}

.h-10 {
  height: 2.5rem;
}

.h-12 {
  height: 3rem;
}

.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;
}

/* 颜色 */
.bg-white {
  background-color: var(--white);
}

.bg-violet-50 {
  background-color: var(--violet-50);
}

.bg-violet-100 {
  background-color: var(--violet-100);
}

.bg-violet-600 {
  background-color: var(--violet-600);
}

.bg-gray-50 {
  background-color: var(--gray-50);
}

.text-white {
  color: var(--white);
}

.text-gray-400 {
  color: var(--gray-400);
}

.text-gray-500 {
  color: var(--gray-500);
}

.text-gray-600 {
  color: var(--gray-600);
}

.text-gray-800 {
  color: var(--gray-800);
}

.text-violet-600 {
  color: var(--violet-600);
}

.text-violet-700 {
  color: var(--violet-700);
}

.text-violet-100 {
  color: var(--violet-100);
}

.border-t {
  border-top-width: 1px;
  border-top-style: solid;
  border-top-color: var(--gray-200);
}

.border-b {
  border-bottom-width: 1px;
  border-bottom-style: solid;
  border-bottom-color: var(--gray-200);
}

.border {
  border-width: 1px;
  border-style: solid;
}

.border-gray-200 {
  border-color: var(--gray-200);
}

.border-violet-200 {
  border-color: var(--violet-200);
}

.rounded-lg {
  border-radius: 0.5rem;
}

.rounded-xl {
  border-radius: 0.75rem;
}

.rounded-full {
  border-radius: 9999px;
}

/* 字体大小 */
.text-xs {
  font-size: 0.75rem;
}

.text-sm {
  font-size: 0.875rem;
}

.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;
}

.font-bold {
  font-weight: 700;
}

.font-semibold {
  font-weight: 600;
}

/* 组件样式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: background-color 0.2s;
}

.hover\:bg-violet-700:hover {
  background-color: var(--violet-700);
}

.hover\:bg-violet-50:hover {
  background-color: var(--violet-50);
}

.hover\:text-violet-600:hover {
  color: var(--violet-600);
}

.hover\:text-gray-600:hover {
  color: var(--gray-600);
}

.card {
  background-color: var(--white);
  border-radius: 0.5rem;
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
}

/* 网格布局 */
.grid {
  display: grid;
}

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

/* 响应式样式 */
@media (min-width: 768px) {
  .md\:flex {
    display: flex;
  }

  .md\:flex-row {
    flex-direction: row;
  }

  .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\:px-8 {
    padding-left: 2rem;
    padding-right: 2rem;
  }

  .md\:text-5xl {
    font-size: 3rem;
  }
  
  .md\:mt-0 {
    margin-top: 0;
  }
}

/* 手风琴/折叠面板 */
.accordion {
  width: 100%;
  margin-top: 1rem;
}

.accordion-item {
  margin-bottom: 0.5rem;
  border: 1px solid var(--gray-200);
  border-radius: 0.375rem;
  overflow: hidden;
}

.accordion-trigger {
  width: 100%;
  padding: 1rem;
  background-color: var(--white);
  text-align: left;
  font-weight: 500;
  cursor: pointer;
  border: none;
  position: relative;
}

.accordion-trigger::after {
  content: '+';
  position: absolute;
  right: 1rem;
  transition: transform 0.2s;
}

.accordion-trigger.active::after {
  content: '-';
}

.accordion-content {
  padding: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out, padding 0.3s ease;
}

.accordion-content.show {
  padding: 1rem;
  max-height: 1000px;
}

.hidden {
  display: none;
}