:root {
  --apple-blue: #016FD1;
  --apple-blue-hover: #0159A8;
  --apple-black: #1d1d1f;
  --apple-gray: #86868b;
  --apple-light-gray: #f5f5f7;
  --apple-white: #ffffff;
  --apple-bg: #fbfbfd;
  --apple-border: #d2d2d7;
  --apple-font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --apple-font-weight-light: 300;
  --apple-font-weight-regular: 400;
  --apple-font-weight-medium: 500;
  --apple-font-weight-semibold: 600;
  --apple-font-weight-bold: 700;
  --apple-spacing-xs: 0.5rem;
  --apple-spacing-sm: 1rem;
  --apple-spacing-md: 1.5rem;
  --apple-spacing-lg: 2rem;
  --apple-spacing-xl: 3rem;
  --apple-spacing-2xl: 4rem;
  --apple-border-radius: 18px;
  --apple-border-radius-sm: 8px;
  --apple-transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
  --apple-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --apple-shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--apple-font);
  font-size: 1.175rem;
  line-height: 1.4705882353;
  font-weight: var(--apple-font-weight-regular);
  color: var(--apple-black);
  background-color: var(--apple-bg);
  letter-spacing: -0.022em;
}

a {
  text-decoration: none;
  color: var(--apple-blue);
  transition: var(--apple-transition);
}

a:hover {
  color: var(--apple-blue-hover);
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  outline: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  outline: none;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--apple-font-weight-semibold);
  line-height: 1.1;
  letter-spacing: 0.001em;
  margin-bottom: 0.8em;
}

h1 {
  font-size: 3rem;
  font-weight: var(--apple-font-weight-bold);
}
h2 {
  font-size: 2.5rem;
}
h3 {
  font-size: 2rem;
}
h4 {
  font-size: 1.5rem;
}
h5 {
  font-size: 1.25rem;
}
h6 {
  font-size: 1rem;
}

p {
  margin-bottom: 1em;
  line-height: 1.6;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--apple-spacing-lg);
}

.section {
  padding: var(--apple-spacing-2xl) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--apple-spacing-xl);
}

.section-title h2 {
  font-size: 2.5rem;
  font-weight: var(--apple-font-weight-semibold);
  margin-bottom: var(--apple-spacing-sm);
}

.section-title p {
  font-size: 1.25rem;
  color: var(--apple-gray);
  max-width: 600px;
  margin: 0 auto;
}

.btn {
  display: inline-block;
  padding: 0.8rem 2rem;
  font-size: 1.125rem;
  font-weight: var(--apple-font-weight-medium);
  text-align: center;
  border-radius: 980px;
  transition: var(--apple-transition);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--apple-blue);
  color: var(--apple-white);
}

.btn-primary:hover {
  background-color: var(--apple-blue-hover);
  text-decoration: none;
}

.btn-secondary {
  background-color: transparent;
  color: var(--apple-blue);
  border: 1px solid var(--apple-blue);
}

.btn-secondary:hover {
  background-color: var(--apple-blue);
  color: var(--apple-white);
  text-decoration: none;
}

.btn-white {
  background-color: var(--apple-white);
  color: var(--apple-blue);
}

.btn-white:hover {
  background-color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
}

.btn-dark {
  background-color: var(--apple-black);
  color: var(--apple-white);
}

.btn-dark:hover {
  background-color: #333;
  text-decoration: none;
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1.25rem;
}

.btn-sm {
  padding: 0.5rem 1.5rem;
  font-size: 0.875rem;
}

.card {
  background-color: var(--apple-white);
  border-radius: var(--apple-border-radius);
  overflow: hidden;
  transition: var(--apple-transition);
}

.card:hover {
  box-shadow: var(--apple-shadow-hover);
}

.card-image {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.card-content {
  padding: var(--apple-spacing-lg);
}

.card-title {
  font-size: 1.5rem;
  font-weight: var(--apple-font-weight-semibold);
  margin-bottom: 0.5rem;
  color: var(--apple-black);
}

.card-text {
  color: var(--apple-gray);
  line-height: 1.5;
}

.grid {
  display: grid;
  gap: var(--apple-spacing-md);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.flex {
  display: flex;
}

.flex-center {
  justify-content: center;
  align-items: center;
}

.flex-between {
  justify-content: space-between;
  align-items: center;
}

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

.flex-wrap {
  flex-wrap: wrap;
}

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

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

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

.text-primary {
  color: var(--apple-blue);
}

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

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

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

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

.bg-white {
  background-color: var(--apple-white);
}

.bg-primary {
  background-color: var(--apple-blue);
}

.bg-dark {
  background-color: var(--apple-black);
  color: var(--apple-white);
}

.mt-sm { margin-top: var(--apple-spacing-xs); }
.mt-md { margin-top: var(--apple-spacing-sm); }
.mt-lg { margin-top: var(--apple-spacing-lg); }
.mt-xl { margin-top: var(--apple-spacing-xl); }
.mt-2xl { margin-top: var(--apple-spacing-2xl); }

.mb-sm { margin-bottom: var(--apple-spacing-xs); }
.mb-md { margin-bottom: var(--apple-spacing-sm); }
.mb-lg { margin-bottom: var(--apple-spacing-lg); }
.mb-xl { margin-bottom: var(--apple-spacing-xl); }
.mb-2xl { margin-bottom: var(--apple-spacing-2xl); }

.pt-sm { padding-top: var(--apple-spacing-xs); }
.pt-md { padding-top: var(--apple-spacing-sm); }
.pt-lg { padding-top: var(--apple-spacing-lg); }
.pt-xl { padding-top: var(--apple-spacing-xl); }
.pt-2xl { padding-top: var(--apple-spacing-2xl); }

.pb-sm { padding-bottom: var(--apple-spacing-xs); }
.pb-md { padding-bottom: var(--apple-spacing-sm); }
.pb-lg { padding-bottom: var(--apple-spacing-lg); }
.pb-xl { padding-bottom: var(--apple-spacing-xl); }
.pb-2xl { padding-bottom: var(--apple-spacing-2xl); }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 767px) {
  html {
    font-size: 14px;
  }

  .container {
    padding: 0 var(--apple-spacing-sm);
  }

  .section {
    padding: var(--apple-spacing-xl) 0;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 2.25rem;
  }
  
  h2 {
    font-size: 2rem;
  }
  
  h3 {
    font-size: 1.5rem;
  }

  .section-title h2 {
    font-size: 2rem;
  }

  .section-title p {
    font-size: 1.125rem;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* IconPark图标样式 */
@import 'icons.css';