html,
body {
  padding: 0;
  margin: 0;
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    Oxygen,
    Ubuntu,
    Cantarell,
    "Fira Sans",
    "Droid Sans",
    "Helvetica Neue",
    sans-serif;
  min-height: 100vh;
}

/* Fluent 2 柔和渐变背景 */
body {
  background: linear-gradient(
    135deg,
    #e3f2fd 0%,
    #f0f4ff 25%,
    #f5f7fa 50%,
    #e8f0f8 75%,
    #dde8f5 100%
  );
  background-attachment: fixed;
  position: relative;
}

/* 添加微妙的纹理层 */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(0, 120, 212, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(106, 90, 205, 0.03) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

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

* {
  box-sizing: border-box;
}

.container {
  padding: 0 2rem;
  position: relative;
  z-index: 1;
}

/* 主题切换按钮 */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: 
    0 2px 8px rgba(0, 0, 0, 0.08),
    0 1px 2px rgba(0, 0, 0, 0.04),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1000;
  padding: 0;
}

.theme-icon {
  width: 20px;
  height: 20px;
  display: block;
  transition: opacity 0.2s cubic-bezier(0.4, 0, 0.2, 1), transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-icon-sun {
  display: none;
}

.theme-icon-moon {
  display: block;
}

html[data-theme="dark"] .theme-icon-sun {
  display: block;
}

html[data-theme="dark"] .theme-icon-moon {
  display: none;
}

.theme-toggle:hover {
  transform: translateY(-2px);
  box-shadow: 
    0 8px 24px rgba(0, 120, 212, 0.15),
    0 4px 8px rgba(0, 0, 0, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.95);
  border-color: rgba(0, 120, 212, 0.3);
  color: #0078d4;
}

.theme-toggle:active {
  transform: translateY(0);
  transition: all 0.1s cubic-bezier(0.4, 0, 0.2, 1);
}

html[data-theme="dark"] .theme-toggle {
  background: rgba(30, 30, 30, 0.7);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 
    0 2px 8px rgba(0, 0, 0, 0.3),
    0 1px 2px rgba(0, 0, 0, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
  color: #ffffff;
}

html[data-theme="dark"] .theme-toggle:hover {
  border-color: rgba(0, 120, 212, 0.4);
  box-shadow: 
    0 8px 24px rgba(0, 120, 212, 0.25),
    0 4px 8px rgba(0, 0, 0, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
  color: #60cdff;
}

.main {
  padding: 3rem 0;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: relative;
  z-index: 1;
}

.title {
  line-height: 1.3;
  font-size: 2.5rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 0.5rem;
  color: #1a1a1a;
  letter-spacing: -0.02em;
}

/* Fluent 2 风格的标题渐变 - 使用 Fluent 蓝系 */
.title {
  background: linear-gradient(
    135deg,
    #0078d4 0%,
    #106ebe 30%,
    #005a9e 60%,
    #0078d4 100%
  );
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.title,
.description {
  text-align: center;
}

.description {
  margin: 4rem 0;
  line-height: 1.5;
  font-size: 1.5rem;
}

.grid {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  max-width: 800px;
}

/* Fluent 2 亚克力玻璃卡片 */
.card {
  width: 100%;
  margin: 1rem;
  padding: 1.5rem;
  text-align: left;
  color: inherit;
  text-decoration: none;
  max-width: 300px;
  
  /* 亚克力玻璃效果 */
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  
  /* Fluent 2 圆角系统 - 等距圆角 */
  border-radius: 12px;
  
  /* 高光描边效果 */
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: 
    0 2px 8px rgba(0, 0, 0, 0.08),
    0 1px 2px rgba(0, 0, 0, 0.04),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
  
  /* Fluent 交互动效 - 轻量空间变化 */
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  transform: translateY(0);
  position: relative;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: 12px;
  padding: 1px;
  background: linear-gradient(
    135deg,
    rgba(0, 120, 212, 0.1) 0%,
    rgba(255, 255, 255, 0.3) 50%,
    rgba(0, 120, 212, 0.1) 100%
  );
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
}

.card.pin {
  background: rgba(247, 247, 247, 0.75);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
}

/* Fluent 2 Hover 效果 - 轻量上浮 */
.card:hover,
.card:focus {
  color: #0078d4;
  transform: translateY(-2px);
  box-shadow: 
    0 8px 24px rgba(0, 120, 212, 0.15),
    0 4px 8px rgba(0, 0, 0, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.95);
  border-color: rgba(0, 120, 212, 0.3);
}

.card:hover::before,
.card:focus::before {
  opacity: 1;
}

.card:active {
  transform: translateY(0);
  transition: all 0.1s cubic-bezier(0.4, 0, 0.2, 1);
}

.card h2 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
  color: #1a1a1a;
  letter-spacing: -0.01em;
  transition: color 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.card:hover h2,
.card:focus h2 {
  color: #0078d4;
}

.card .title-icon {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
  gap: 0.75rem;
}

.card .title-icon img {
  width: 32px;
  height: 32px;
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.1));
}

.card:hover .title-icon img,
.card:focus .title-icon img {
  transform: scale(1.05);
}

.card p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: #605e5c;
  transition: color 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.card:hover p,
.card:focus p {
  color: #323130;
}

.card .single {
  text-overflow: ellipsis;
  overflow: hidden;
  word-break: break-all;
  white-space: nowrap;
}

.beian {
  margin-bottom: 24px;
  margin-top: 32px;
  text-align: center;
}

.beian img {
  width: 14px;
  height: 14px;
  margin: 0 4px;
  vertical-align: middle;
}

.beian a {
  text-decoration: none;
  font-size: 13px;
  color: #605e5c;
  transition: color 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.beian a:hover {
  color: #0078d4;
}

@media (max-width: 600px) {
  .grid {
    width: 100%;
    flex-direction: column;
  }
}

/* Fluent 2 深色模式 */
html[data-theme="dark"] {
  color-scheme: dark;
}

html[data-theme="dark"] body {
  color: #ffffff;
  background: linear-gradient(
    135deg,
    #1a1a1a 0%,
    #1f1f1f 25%,
    #1a1a1a 50%,
    #1d1d1d 75%,
    #1a1a1a 100%
  );
}

html[data-theme="dark"] body::before {
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(0, 120, 212, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(106, 90, 205, 0.08) 0%, transparent 50%);
}

html[data-theme="dark"] .title {
  background: linear-gradient(
    135deg,
    #60cdff 0%,
    #4fc3f7 30%,
    #29b6f6 60%,
    #60cdff 100%
  );
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

html[data-theme="dark"] .card {
  background: rgba(30, 30, 30, 0.7);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 
    0 2px 8px rgba(0, 0, 0, 0.3),
    0 1px 2px rgba(0, 0, 0, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

html[data-theme="dark"] .card::before {
  background: linear-gradient(
    135deg,
    rgba(0, 120, 212, 0.2) 0%,
    rgba(255, 255, 255, 0.1) 50%,
    rgba(0, 120, 212, 0.2) 100%
  );
}

html[data-theme="dark"] .card h2 {
  color: #ffffff;
}

html[data-theme="dark"] .card:hover h2,
html[data-theme="dark"] .card:focus h2 {
  color: #60cdff;
}

html[data-theme="dark"] .card:hover,
html[data-theme="dark"] .card:focus {
  border-color: rgba(0, 120, 212, 0.4);
  box-shadow: 
    0 8px 24px rgba(0, 120, 212, 0.25),
    0 4px 8px rgba(0, 0, 0, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

html[data-theme="dark"] .card p {
  color: #c8c6c4;
}

html[data-theme="dark"] .card:hover p,
html[data-theme="dark"] .card:focus p {
  color: #e1dfdd;
}

html[data-theme="dark"] .pin.card {
  background: rgba(40, 40, 40, 0.75);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
}

html[data-theme="dark"] .beian a {
  color: #c8c6c4;
}

html[data-theme="dark"] .beian a:hover {
  color: #60cdff;
}