/* 重置样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: #333;
  line-height: 1.5;
}

/* 布局 */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.flex {
  display: flex;
}

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

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

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

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

.gap-2 {
  gap: 0.5rem;
}

.gap-4 {
  gap: 1rem;
}

.gap-6 {
  gap: 1.5rem;
}

.gap-8 {
  gap: 2rem;
}

.min-h-screen {
  min-height: 100vh;
}

.flex-1 {
  flex: 1;
}

.flex-none {
  flex: none;
}

.w-full {
  width: 100%;
}

.h-full {
  height: 100%;
}

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

.relative {
  position: relative;
}

.absolute {
  position: absolute;
}

.inset-0 {
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
}

.grid {
  display: grid;
}

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

.space-y-2 > * + * {
  margin-top: 0.5rem;
}

.space-y-4 > * + * {
  margin-top: 1rem;
}

.space-y-6 > * + * {
  margin-top: 1.5rem;
}

.space-y-8 > * + * {
  margin-top: 2rem;
}

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

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

.mb-6 {
  margin-bottom: 1.5rem;
}

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

.mt-2 {
  margin-top: 0.5rem;
}

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

.mt-6 {
  margin-top: 1.5rem;
}

.mt-8 {
  margin-top: 2rem;
}

.ml-auto {
  margin-left: auto;
}

.ml-1 {
  margin-left: 0.25rem;
}

.ml-2 {
  margin-left: 0.5rem;
}

.ml-4 {
  margin-left: 1rem;
}

.mr-1 {
  margin-right: 0.25rem;
}

.mr-2 {
  margin-right: 0.5rem;
}

.py-2 {
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
}

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

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

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

.px-2 {
  padding-left: 0.5rem;
  padding-right: 0.5rem;
}

.px-4 {
  padding-left: 1rem;
  padding-right: 1rem;
}

.p-2 {
  padding: 0.5rem;
}

.p-4 {
  padding: 1rem;
}

.p-6 {
  padding: 1.5rem;
}

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

h1 {
  font-size: 2.25rem;
}

h2 {
  font-size: 1.875rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

.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;
}

.font-medium {
  font-weight: 500;
}

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

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

.text-muted {
  color: #6c757d;
}

.text-primary {
  color: #0070f3;
}

.text-white {
  color: #fff;
}

/* 组件 */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #eaeaea;
}

.header-inner {
  height: 4rem;
  display: flex;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.25rem;
  text-decoration: none;
  color: #333;
}

.logo img {
  width: 2rem;
  height: 2rem;
}

.nav {
  display: flex;
  gap: 1.5rem;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  color: #6c757d;
  transition: color 0.2s;
}

.nav-link:hover {
  color: #0070f3;
}

.nav-link.active {
  color: #0070f3;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.375rem;
  font-weight: 500;
  font-size: 0.875rem;
  padding: 0.5rem 1rem;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

.btn-sm {
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
}

.btn-lg {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
}

.btn-primary {
  background-color: #0070f3;
  color: white;
  border: 1px solid #0070f3;
}

.btn-primary:hover {
  background-color: #005cc5;
  border-color: #005cc5;
}

.btn-outline {
  background-color: transparent;
  color: #333;
  border: 1px solid #d1d5db;
}

.btn-outline:hover {
  background-color: #f9fafb;
}

.btn-ghost {
  background-color: transparent;
  color: #333;
  border: 1px solid transparent;
}

.btn-ghost:hover {
  background-color: #f9fafb;
}

.btn-icon {
  padding: 0.5rem;
  border-radius: 0.375rem;
}

.card {
  background-color: white;
  border-radius: 0.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  border: 1px solid #eaeaea;
}

.card-header {
  padding: 1.5rem 1.5rem 0.75rem;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.card-description {
  color: #6c757d;
  font-size: 0.875rem;
}

.card-content {
  padding: 0.75rem 1.5rem;
}

.card-footer {
  padding: 0.75rem 1.5rem 1.5rem;
  display: flex;
}

.badge {
  display: inline-flex;
  align-items: center;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.25rem 0.75rem;
  background-color: #f3f4f6;
  color: #374151;
}

.badge-outline {
  background-color: transparent;
  border: 1px solid #d1d5db;
}

.badge-primary {
  background-color: #0070f3;
  color: white;
}

.avatar {
  position: relative;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 9999px;
  overflow: hidden;
  background-color: #f3f4f6;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #6c757d;
  font-weight: 500;
}

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

.avatar-lg {
  width: 6rem;
  height: 6rem;
}

.input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border-radius: 0.375rem;
  border: 1px solid #d1d5db;
  font-size: 0.875rem;
  outline: none;
  transition: border-color 0.2s;
}

.input:focus {
  border-color: #0070f3;
  box-shadow: 0 0 0 2px rgba(0, 112, 243, 0.1);
}

.input-group {
  display: flex;
  position: relative;
}

.input-icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: #6c757d;
}

.input-icon + .input {
  padding-left: 2.5rem;
}

.select {
  width: 100%;
  padding: 0.5rem 2rem 0.5rem 0.75rem;
  border-radius: 0.375rem;
  border: 1px solid #d1d5db;
  font-size: 0.875rem;
  background-color: white;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
  background-position: right 0.5rem center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  appearance: none;
  outline: none;
}

.select:focus {
  border-color: #0070f3;
  box-shadow: 0 0 0 2px rgba(0, 112, 243, 0.1);
}

.checkbox {
  width: 1rem;
  height: 1rem;
  border-radius: 0.25rem;
  border: 1px solid #d1d5db;
  appearance: none;
  outline: none;
  cursor: pointer;
}

.checkbox:checked {
  background-color: #0070f3;
  border-color: #0070f3;
  background-image: url("data:image/svg+xml,%3csvg viewBox='0 0 16 16' fill='white' xmlns='http://www.w3.org/2000/svg'%3e%3cpath d='M12.207 4.793a1 1 0 010 1.414l-5 5a1 1 0 01-1.414 0l-2-2a1 1 0 011.414-1.414L6.5 9.086l4.293-4.293a1 1 0 011.414 0z'/%3e%3c/svg%3e");
  background-position: center;
  background-repeat: no-repeat;
}

.tabs {
  display: flex;
  flex-direction: column;
  width: 100%;
}

.tabs-list {
  display: flex;
  border-bottom: 1px solid #e5e7eb;
  margin-bottom: 1rem;
}

.tab {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: #6c757d;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
}

.tab:hover {
  color: #0070f3;
}

.tab.active {
  color: #0070f3;
  border-bottom-color: #0070f3;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.footer {
  border-top: 1px solid #eaeaea;
  background-color: #f9fafb;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 2rem 0;
}

/* 响应式 */
@media (min-width: 640px) {
  .grid-cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

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

  .sm\:gap-6 {
    gap: 1.5rem;
  }
}

@media (min-width: 768px) {
  .grid-cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .md\:grid-cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .md\:grid-cols-\[250px_1fr\] {
    grid-template-columns: 250px 1fr;
  }

  .md\:grid-cols-\[240px_1fr\] {
    grid-template-columns: 240px 1fr;
  }

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

  .md\:px-6 {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
}

@media (min-width: 1024px) {
  .grid-cols-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .lg\:grid-cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .lg\:py-32 {
    padding-top: 8rem;
    padding-bottom: 8rem;
  }
}

@media (min-width: 1280px) {
  .xl\:grid-cols-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* 特殊样式 */
.bg-gradient {
  background-image: linear-gradient(to bottom, #f9fafb, #ffffff);
}

.bg-muted {
  background-color: #f9fafb;
}

.aspect-video {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 */
  height: 0;
  overflow: hidden;
}

.aspect-video img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.aspect-square {
  position: relative;
  padding-bottom: 100%;
  height: 0;
  overflow: hidden;
}

.aspect-square img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.rounded {
  border-radius: 0.375rem;
}

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

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

.border {
  border: 1px solid #eaeaea;
}

.border-t {
  border-top: 1px solid #eaeaea;
}

.border-b {
  border-bottom: 1px solid #eaeaea;
}

.shadow {
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.shadow-md {
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.overflow-hidden {
  overflow: hidden;
}

.line-clamp-1 {
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

/* 图标 */
.icon {
  width: 1.25rem;
  height: 1.25rem;
  display: inline-block;
  vertical-align: middle;
}

.icon-sm {
  width: 1rem;
  height: 1rem;
}

.icon-lg {
  width: 1.5rem;
  height: 1.5rem;
}