/* Apple Style CSS */
:root {
  /* Apple 标准颜色 */
  --apple-white: #ffffff;
  --apple-gray-50: #f5f5f7;
  --apple-gray-100: #e8e8ed;
  --apple-gray-200: #d2d2d7;
  --apple-gray-300: #a1a1a6;
  --apple-gray-400: #86868b;
  --apple-gray-500: #6e6e73;
  --apple-gray-600: #55555a;
  --apple-gray-700: #3a3a3c;
  --apple-gray-800: #2c2c2e;
  --apple-gray-900: #1c1c1e;
  --apple-blue: #0066cc;
  --apple-blue-hover: #2983cc;
  --apple-black: #000000;
  --apple-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  --apple-border-radius: 12px;
  --apple-transition: all 0.2s ease-in-out;
  --max-width: 980px;
}

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

html, body {
  height: 100%;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  font-weight: 400;
  line-height: 1.5;
  color: var(--apple-gray-900);
  background-color: var(--apple-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 通用容器 */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* 辅助类 */
.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;
}

/* Skip link for accessibility */
.skip-link {
  position: fixed;
  left: 20px;
  top: 20px;
  background: var(--apple-white);
  color: var(--apple-blue);
  padding: 12px 16px;
  border-radius: 8px;
  z-index: 1000;
  transform: translateY(-150%);
  transition: transform 0.3s ease;
  text-decoration: none;
  box-shadow: var(--apple-shadow);
}

.skip-link:focus {
  transform: translateY(0);
  outline: 2px solid var(--apple-blue);
  outline-offset: 2px;
}

/* Apple 导航 */
.apple-nav {
  background-color: var(--apple-white);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--apple-gray-100);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-logo-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  text-align: center;
}

.nav-logo {
  font-size: 18px;
  font-weight: 600;
  color: var(--apple-gray-900);
  text-decoration: none;
  letter-spacing: -0.5px;
}



.nav a {
  font-size: 14px;
  color: var(--apple-gray-700);
  text-decoration: none;
  transition: color var(--apple-transition);
}

.nav a:hover,
.nav a:focus {
  color: var(--apple-blue);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 22px;
  color: var(--apple-gray-700);
  padding: 8px;
  cursor: pointer;
}

/* Apple 英雄区域 */
.apple-hero {
  padding: 120px 0 80px;
  text-align: center;
}

.apple-large-title-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
  text-align: center;
}

.apple-large-title {
  font-size: 56px;
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--apple-gray-900);
  margin: 0;
}

.apple-title-gif {
  height: 120px;
  width: 120px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.nav-logo-gif {
  height: 24px;
  width: 24px;
  vertical-align: middle;
  border-radius: 50%;
  object-fit: cover;
}

/* 响应式调整 */
@media (max-width: 720px) {
  .apple-large-title-container {
    gap: 12px;
  }
  
  .apple-large-title {
    font-size: 40px;
  }
  
  .apple-title-gif {
    height: 100px;
    width: 100px;
  }
  
  .nav-logo-gif {
    height: 20px;
    width: 20px;
  }
  
  .nav-logo-container {
    gap: 3px;
  }
}

.apple-subtitle {
  font-size: 24px;
  font-weight: 400;
  color: var(--apple-gray-600);
  margin-bottom: 32px;
  letter-spacing: 0.011em;
}

.apple-cta {
  margin-top: 32px;
}

/* Apple 按钮样式 */
.apple-btn {
  display: inline-block;
  font-size: 17px;
  font-weight: 500;
  color: var(--apple-white);
  background-color: var(--apple-blue);
  border-radius: 980px;
  padding: 12px 24px;
  text-decoration: none;
  transition: background-color var(--apple-transition);
  cursor: pointer;
  border: none;
  outline: none;
}

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

.apple-btn:focus {
  outline: 2px solid var(--apple-blue);
  outline-offset: 2px;
}

.apple-btn-full {
  width: 100%;
  text-align: center;
}

/* Apple 链接样式 */
.apple-link {
  color: var(--apple-blue);
  text-decoration: none;
  font-size: 16px;
  font-weight: 400;
  transition: var(--apple-transition);
}

.apple-link:hover {
  text-decoration: underline;
}

/* Apple 内容区域 */
.apple-section {
  padding: 80px 0;
  border-top: 1px solid var(--apple-gray-100);
}

.apple-section-title {
  font-size: 40px;
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin-bottom: 40px;
  text-align: center;
  color: var(--apple-gray-900);
}

.apple-content {
  max-width: 720px;
  margin: 0 auto 48px;
  text-align: center;
}

.apple-content p {
  font-size: 17px;
  color: var(--apple-gray-700);
  line-height: 1.6;
  margin-bottom: 16px;
}

/* Apple 网格布局 */
.apple-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
  margin-top: 40px;
}

.apple-card {
  background: var(--apple-white);
  border-radius: var(--apple-border-radius);
  padding: 32px;
  transition: var(--apple-transition);
  border: 1px solid var(--apple-gray-100);
}

.apple-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--apple-shadow);
}

.apple-card-title {
  font-size: 24px;
  font-weight: 500;
  color: var(--apple-gray-900);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.apple-card-desc {
  font-size: 16px;
  color: var(--apple-gray-600);
  margin-bottom: 24px;
  line-height: 1.6;
}

/* 评论卡片样式 */
.apple-comment-card {
  background: var(--apple-white);
  border-radius: var(--apple-border-radius);
  padding: 24px;
  margin-bottom: 16px;
  border: 1px solid var(--apple-gray-100);
  text-align: left;
}

.apple-comment-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.apple-comment-header strong {
  font-size: 16px;
  color: var(--apple-gray-900);
}

.apple-comment-time {
  font-size: 12px;
  color: var(--apple-gray-500);
}

.apple-comment-content {
  font-size: 15px;
  color: var(--apple-gray-700);
  line-height: 1.6;
  white-space: pre-line;
}

/* Apple 表单样式 */
.apple-form {
  max-width: 580px;
  margin: 0 auto;
}

.apple-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.apple-form-group {
  margin-bottom: 16px;
}

.apple-form input,
.apple-form textarea {
  width: 100%;
  padding: 14px;
  border: 1px solid var(--apple-gray-200);
  border-radius: 8px;
  font-size: 16px;
  font-family: inherit;
  color: var(--apple-gray-900);
  background-color: var(--apple-white);
  transition: var(--apple-transition);
}

.apple-form input:focus,
.apple-form textarea:focus {
  outline: none;
  border-color: var(--apple-blue);
  background-color: var(--apple-white);
  box-shadow: 0 0 0 2px rgba(0, 102, 204, 0.1);
}

.apple-form textarea {
  min-height: 140px;
  resize: vertical;
  line-height: 1.5;
}

/* Apple 页脚 */
.apple-footer {
  background-color: var(--apple-gray-50);
  padding: 40px 0;
  border-top: 1px solid var(--apple-gray-100);
}

.apple-footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  text-align: center;
}

.apple-footer-content p {
  font-size: 13px;
  color: var(--apple-gray-500);
}

/* 响应式设计 */
@media (max-width: 768px) {
  .apple-hero {
    padding: 80px 0 60px;
  }
  
  .apple-large-title {
    font-size: 40px;
  }
  
  .apple-subtitle {
    font-size: 20px;
  }
  
  .apple-section {
    padding: 60px 0;
  }
  
  .apple-section-title {
    font-size: 32px;
    margin-bottom: 32px;
  }
  
  .apple-grid {
    gap: 24px;
  }
  
  .apple-card {
    padding: 24px;
  }
  
  .apple-form-row {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .nav {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--apple-white);
    flex-direction: column;
    gap: 16px;
    padding: 24px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    display: none;
    z-index: 99;
    border-bottom: 1px solid var(--apple-gray-100);
  }
  
  .nav.show {
    display: flex;
  }
  
  .nav-toggle {
    display: block;
  }
}

@media (max-width: 480px) {
  .apple-large-title {
    font-size: 32px;
  }
  
  .apple-subtitle {
    font-size: 18px;
  }
  
  .apple-section-title {
    font-size: 28px;
  }
  
  .apple-btn {
    font-size: 16px;
    padding: 10px 20px;
  }
}

/* 滚动平滑 */
html {
  scroll-behavior: smooth;
}

/* Apple 淡入动画 */
.apple-fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s cubic-bezier(0.25, 0.1, 0.25, 1), transform 0.8s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.apple-fade-in.apple-visible {
  opacity: 1;
  transform: translateY(0);
}

/* 延迟淡入 */
.apple-fade-in-delay-1 {
  transition-delay: 0.1s;
}

.apple-fade-in-delay-2 {
  transition-delay: 0.2s;
}

.apple-fade-in-delay-3 {
  transition-delay: 0.3s;
}

/* 微交互效果 */
.apple-micro-interaction {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.apple-micro-interaction:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

/* 微妙的缩放效果 */
.apple-scale {
  transition: transform 0.2s ease;
}

.apple-scale:hover {
  transform: scale(1.02);
}

/* GIF上传相关样式 */
.apple-gif {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin-bottom: 16px;
}

.apple-gif-links {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--apple-gray-100);
}

.apple-gif-links .apple-form-group {
  margin-bottom: 12px;
}

.apple-gif-links label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--apple-gray-700);
  margin-bottom: 6px;
}

.input-group {
  display: flex;
  gap: 8px;
}

.copy-input {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--apple-gray-200);
  border-radius: 6px;
  font-size: 14px;
  background-color: var(--apple-white);
  color: var(--apple-gray-900);
  transition: border-color 0.2s ease;
}

.copy-input:focus {
  outline: none;
  border-color: var(--apple-blue);
}

.apple-btn-small {
  padding: 6px 12px;
  font-size: 13px;
  min-width: 80px;
}

.apple-spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--apple-gray-200);
  border-top-color: var(--apple-blue);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  vertical-align: middle;
  margin-right: 8px;
}

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

#upload-status {
  margin-top: 16px;
  text-align: center;
}

/* 按钮波纹效果 */
.apple-btn {
  position: relative;
  overflow: hidden;
}

.apple-btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s ease, height 0.6s ease;
}

.apple-btn:active::after {
  width: 300px;
  height: 300px;
}

/* 导航栏滚动效果 */
.apple-nav-scroll {
  transition: background-color 0.3s ease, border-bottom 0.3s ease, box-shadow 0.3s ease;
}

/* 输入框交互效果 */
.apple-form input,
.apple-form textarea {
  position: relative;
  transition: border-color 0.3s ease, box-shadow 0.3s ease, padding 0.3s ease;
}

.apple-form input:focus,
.apple-form textarea:focus {
  padding-left: 16px;
  padding-right: 16px;
}

/* 链接下划线动画 */
.apple-link-underline {
  position: relative;
  text-decoration: none;
}

.apple-link-underline::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--apple-blue);
  transition: width 0.3s ease;
}

.apple-link-underline:hover::after {
  width: 100%;
}

/* 加载动画 */
@keyframes apple-spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

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

/* 脉冲动画 */
@keyframes apple-pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(0, 102, 204, 0.4);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(0, 102, 204, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(0, 102, 204, 0);
  }
}

.apple-pulse {
  animation: apple-pulse 2s infinite;
}