/**
 * Material Design 3 完整实现
 * AI小说网 - 符合官方规范的设计系统
 */

/* ===== Material Design 3 基础变量 ===== */
:root {
  /* 颜色系统 - Primary Palette */
  --md-primary: #6200ee;
  --md-on-primary: #ffffff;
  --md-primary-container: #e0d6ff;
  --md-on-primary-container: #21005d;
  
  /* 颜色系统 - Secondary Palette */
  --md-secondary: #625b71;
  --md-on-secondary: #ffffff;
  --md-secondary-container: #e8def8;
  --md-on-secondary-container: #1d192b;
  
  /* 颜色系统 - Tertiary Palette */
  --md-tertiary: #7d5260;
  --md-on-tertiary: #ffffff;
  --md-tertiary-container: #ffd8e4;
  --md-on-tertiary-container: #31111d;
  
  /* 颜色系统 - Error Palette */
  --md-error: #b3261e;
  --md-on-error: #ffffff;
  --md-error-container: #f9dedc;
  --md-on-error-container: #410e0b;
  
  /* 颜色系统 - Surface & Background */
  --md-surface: #fffbfe;
  --md-surface-dim: #ddd8dd;
  --md-surface-bright: #fffbfe;
  --md-surface-container-lowest: #ffffff;
  --md-surface-container-low: #f7f2fa;
  --md-surface-container: #f3edf7;
  --md-surface-container-high: #ece6f0;
  --md-surface-container-highest: #e6e0e9;
  --md-on-surface: #1c1b1f;
  --md-on-surface-variant: #49454f;
  --md-outline: #79747e;
  --md-outline-variant: #cac4d0;
  --md-shadow: #000000;
  --md-scrim: #000000;
  
  /* 颜色系统 - Inverse */
  --md-inverse-surface: #313033;
  --md-inverse-on-surface: #f4eff4;
  --md-inverse-primary: #cbb2ff;
  
  /* 灰度系统 */
  --md-grey-50: #fafafa;
  --md-grey-100: #f5f5f5;
  --md-grey-200: #eeeeee;
  --md-grey-300: #e0e0e0;
  --md-grey-400: #bdbdbd;
  --md-grey-500: #9e9e9e;
  --md-grey-600: #757575;
  --md-grey-700: #616161;
  --md-grey-800: #424242;
  --md-grey-900: #212121;
  
  /* 阴影系统 */
  --shadow-1: 0 1px 2px 0 rgba(0, 0, 0, 0.3), 0 1px 3px 1px rgba(0, 0, 0, 0.15);
  --shadow-2: 0 1px 2px 0 rgba(0, 0, 0, 0.3), 0 2px 6px 2px rgba(0, 0, 0, 0.15);
  --shadow-3: 0 4px 8px 3px rgba(0, 0, 0, 0.15), 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-4: 0 6px 10px 4px rgba(0, 0, 0, 0.15), 0 2px 4px 2px rgba(0, 0, 0, 0.3);
  --shadow-5: 0 8px 12px 6px rgba(0, 0, 0, 0.15), 0 4px 4px 4px rgba(0, 0, 0, 0.3);
  
  /* 过渡动画 */
  --transition: all 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-standard: all 300ms cubic-bezier(0.2, 0, 0, 1);
  --transition-decelerate: all 250ms cubic-bezier(0, 0, 0.2, 1);
  --transition-accelerate: all 200ms cubic-bezier(0.3, 0, 1, 1);
  
  /* 圆角系统 */
  --shape-corner-none: 0px;
  --shape-corner-extra-small: 4px;
  --shape-corner-small: 8px;
  --shape-corner-medium: 12px;
  --shape-corner-large: 16px;
  --shape-corner-extra-large: 28px;
  --shape-corner-full: 50%;
  
  /* 字体系统 */
  --font-family-base: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-family-mono: 'Roboto Mono', 'Courier New', monospace;
  
  /* 排版比例尺 */
  --typescale-display-large: 57px;
  --typescale-display-medium: 45px;
  --typescale-display-small: 36px;
  --typescale-headline-large: 32px;
  --typescale-headline-medium: 28px;
  --typescale-headline-small: 24px;
  --typescale-title-large: 22px;
  --typescale-title-medium: 16px;
  --typescale-title-small: 14px;
  --typescale-body-large: 16px;
  --typescale-body-medium: 14px;
  --typescale-body-small: 12px;
  --typescale-label-large: 14px;
  --typescale-label-medium: 12px;
  --typescale-label-small: 11px;
}

/* ===== Material Design 3 基础重置 ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--typescale-body-medium);
  line-height: 1.5;
  color: var(--md-on-surface);
  background-color: var(--md-surface);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== Material Design 3 按钮组件 ===== */
.md-button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 10px 24px;
  border: none;
  border-radius: var(--shape-corner-extra-large);
  font-family: var(--font-family-base);
  font-size: var(--typescale-label-large);
  font-weight: 500;
  letter-spacing: 0.1px;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  overflow: hidden;
  transition: var(--transition-standard);
  outline: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

/* 文本按钮 */
.md-button.text {
  color: var(--md-primary);
  background: transparent;
}

.md-button.text:hover {
  background-color: rgba(98, 0, 238, 0.08);
}

.md-button.text:focus {
  background-color: rgba(98, 0, 238, 0.12);
}

.md-button.text:active {
  background-color: rgba(98, 0, 238, 0.16);
}

/* 填充按钮 */
.md-button.filled {
  background-color: var(--md-primary);
  color: var(--md-on-primary);
  box-shadow: var(--shadow-1);
}

.md-button.filled:hover {
  background-color: var(--md-primary);
  box-shadow: var(--shadow-2);
}

.md-button.filled:focus {
  background-color: var(--md-primary);
  box-shadow: var(--shadow-1);
}

.md-button.filled:active {
  background-color: var(--md-primary);
  box-shadow: var(--shadow-1);
}

.md-button.filled:disabled {
  background-color: var(--md-on-surface);
  color: var(--md-surface);
  opacity: 0.12;
  box-shadow: none;
  cursor: default;
}

/* 轮廓按钮 */
.md-button.outlined {
  background-color: transparent;
  color: var(--md-primary);
  border: 1px solid var(--md-outline);
}

.md-button.outlined:hover {
  background-color: rgba(98, 0, 238, 0.08);
  border-color: var(--md-primary);
}

.md-button.outlined:focus {
  background-color: rgba(98, 0, 238, 0.12);
  border-color: var(--md-primary);
}

.md-button.outlined:active {
  background-color: rgba(98, 0, 238, 0.16);
}

/* 悬浮按钮 */
.md-button.fab {
  width: 56px;
  height: 56px;
  min-width: 56px;
  padding: 0;
  border-radius: var(--shape-corner-full);
  box-shadow: var(--shadow-3);
}

.md-button.fab.small {
  width: 40px;
  height: 40px;
  min-width: 40px;
}

.md-button.fab.large {
  width: 96px;
  height: 96px;
  min-width: 96px;
  border-radius: var(--shape-corner-extra-large);
}

/* 图标按钮 */
.md-icon-button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  min-width: 48px;
  min-height: 48px;
  padding: 12px;
  border: none;
  border-radius: var(--shape-corner-full);
  background: transparent;
  color: var(--md-on-surface-variant);
  cursor: pointer;
  transition: var(--transition-standard);
  outline: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.md-icon-button:hover {
  background-color: rgba(30, 25, 43, 0.08);
  color: var(--md-on-surface);
}

.md-icon-button:focus {
  background-color: rgba(30, 25, 43, 0.12);
}

.md-icon-button:active {
  background-color: rgba(30, 25, 43, 0.16);
}

.md-icon-button.selected {
  color: var(--md-primary);
  background-color: rgba(98, 0, 238, 0.12);
}

/* ===== Material Design 3 卡片组件 ===== */
.md-card {
  display: flex;
  flex-direction: column;
  background-color: var(--md-surface);
  border-radius: var(--shape-corner-medium);
  box-shadow: var(--shadow-1);
  transition: var(--transition-standard);
  overflow: hidden;
}

.md-card:hover {
  box-shadow: var(--shadow-2);
}

.md-card.elevated {
  box-shadow: var(--shadow-2);
}

.md-card.elevated:hover {
  box-shadow: var(--shadow-3);
}

.md-card.outlined {
  border: 1px solid var(--md-outline-variant);
  box-shadow: none;
}

.md-card.outlined:hover {
  border-color: var(--md-outline);
}

.md-card-header {
  padding: 16px;
}

.md-card-title {
  font-size: var(--typescale-title-large);
  font-weight: 500;
  line-height: 1.375;
  color: var(--md-on-surface);
  margin-bottom: 4px;
}

.md-card-subtitle {
  font-size: var(--typescale-body-medium);
  color: var(--md-on-surface-variant);
  line-height: 1.4285714286;
}

.md-card-content {
  padding: 0 16px 16px;
  flex-grow: 1;
}

.md-card-actions {
  display: flex;
  padding: 8px 16px 16px;
  gap: 8px;
}

.md-card-actions.align-end {
  justify-content: flex-end;
}

/* ===== Material Design 3 表单组件 ===== */
.md-text-field {
  position: relative;
  display: inline-block;
  width: 100%;
  min-width: 64px;
}

.md-text-field-input {
  width: 100%;
  padding: 16px 16px 16px;
  font-family: var(--font-family-base);
  font-size: var(--typescale-body-large);
  line-height: 1.5;
  color: var(--md-on-surface);
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--md-on-surface-variant);
  outline: none;
  transition: var(--transition-standard);
}

.md-text-field-input:focus {
  border-bottom: 2px solid var(--md-primary);
}

.md-text-field-input::placeholder {
  color: var(--md-on-surface-variant);
  opacity: 1;
}

.md-text-field-label {
  position: absolute;
  top: 16px;
  left: 16px;
  font-size: var(--typescale-body-large);
  color: var(--md-on-surface-variant);
  pointer-events: none;
  transition: var(--transition-standard);
  transform-origin: left top;
}

.md-text-field-input:focus + .md-text-field-label,
.md-text-field-input:not(:placeholder-shown) + .md-text-field-label {
  top: -8px;
  font-size: var(--typescale-body-small);
  color: var(--md-primary);
  transform: scale(0.75);
}

.md-text-field.helper {
  margin-bottom: 24px;
}

.md-text-field-helper {
  margin-top: 4px;
  font-size: var(--typescale-body-small);
  color: var(--md-on-surface-variant);
}

.md-text-field.error .md-text-field-input {
  border-bottom-color: var(--md-error);
}

.md-text-field.error .md-text-field-label {
  color: var(--md-error);
}

.md-text-field.error .md-text-field-helper {
  color: var(--md-error);
}

/* ===== Material Design 3 导航组件 ===== */
.md-top-app-bar {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  height: 64px;
  padding: 0 16px;
  background-color: var(--md-surface);
  color: var(--md-on-surface);
  border-bottom: 1px solid var(--md-outline-variant);
  box-shadow: var(--shadow-1);
}

.md-top-app-bar.fixed {
  position: fixed;
  width: 100%;
}

.md-top-app-bar-title {
  font-size: var(--typescale-title-large);
  font-weight: 500;
  line-height: 1.375;
  flex-grow: 1;
  margin-left: 12px;
}

.md-top-app-bar-section {
  display: flex;
  align-items: center;
  gap: 8px;
}

.md-navigation {
  display: flex;
  align-items: center;
  gap: 8px;
}

.md-navigation-item {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 64px;
  padding: 16px 12px 20px;
  color: var(--md-on-surface-variant);
  text-decoration: none;
  font-size: var(--typescale-label-medium);
  font-weight: 500;
  line-height: 1.3333333333;
  text-align: center;
  cursor: pointer;
  /* 优化过渡效果，避免点击时的拉伸 */
  transition: color 0.2s ease, background-color 0.2s ease;
  border-radius: var(--shape-corner-extra-small);
}

.md-navigation-item:hover {
  color: var(--md-on-surface);
  background-color: rgba(30, 25, 43, 0.08);
  /* 确保没有transform效果导致拉伸 */
  transform: none;
}

.md-navigation-item.active {
  color: var(--md-primary);
}

.md-navigation-item.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 3px;
  background-color: var(--md-primary);
  border-radius: 3px 3px 0 0;
}

.md-navigation-item .material-icons {
  margin-bottom: 4px;
  font-size: var(--typescale-body-large);
}

/* 移动端底部导航 */
@media (max-width: 767px) {
  .md-navigation.mobile-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--md-surface);
    border-top: 1px solid var(--md-outline-variant);
    box-shadow: var(--shadow-2);
    padding: 8px 0 12px;
    z-index: 1000;
    /* 防止跳转时的高度变化 */
    height: auto;
    min-height: 56px;
    /* 禁用不必要的过渡动画 */
    transition: none;
  }
  
  .md-navigation-item {
    flex: 1;
    min-width: 0;
    padding: 6px 2px 8px;
    font-size: var(--typescale-label-small);
    /* 确保项目高度一致 */
    height: 44px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    /* 减少跳转时的视觉干扰 */
    transition: none;
  }
  
  .md-navigation-item .material-icons {
    font-size: var(--typescale-body-medium);
    margin-bottom: 2px;
    /* 固定图标大小防止跳动 */
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  /* 防止页面跳转时的整体布局跳动 */
  body {
    /* 确保页面内容不会因为导航固定定位而产生偏移 */
    padding-bottom: 56px;
  }
  
  /* 优化跳转动画 */
  .md-navigation-item:not(.active) {
    transform: none;
    transition: none;
  }
  
  .md-navigation-item.active {
    /* 保持激活状态的稳定性 */
    transform: none;
    transition: none;
  }
}

/* ===== Material Design 3 徽章组件 ===== */
.md-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 22px;
  padding: 0 6px;
  background-color: var(--md-error);
  color: var(--md-on-error);
  font-size: var(--typescale-label-small);
  font-weight: 500;
  line-height: 1;
  border-radius: var(--shape-corner-full);
  box-shadow: var(--shadow-1);
}

.md-badge.secondary {
  background-color: var(--md-secondary);
  color: var(--md-on-secondary);
}

.md-badge.surface {
  background-color: var(--md-surface-variant);
  color: var(--md-on-surface-variant);
}

/* ===== Material Design 3 进度指示器 ===== */
.md-linear-progress {
  width: 100%;
  height: 4px;
  background-color: var(--md-surface-variant);
  border-radius: 2px;
  overflow: hidden;
}

.md-linear-progress-indicator {
  height: 100%;
  background-color: var(--md-primary);
  border-radius: 2px;
  transition: width 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.md-circular-progress {
  display: inline-block;
  width: 48px;
  height: 48px;
  position: relative;
}

.md-circular-progress-svg {
  width: 100%;
  height: 100%;
  animation: md-rotate 2s linear infinite;
}

.md-circular-progress-circle {
  stroke: var(--md-primary);
  stroke-linecap: round;
  stroke-dasharray: 283;
  stroke-dashoffset: 280;
  transform-origin: center;
  animation: md-dash 1.5s ease-in-out infinite;
}

@keyframes md-rotate {
  100% {
    transform: rotate(360deg);
  }
}

@keyframes md-dash {
  0% {
    stroke-dashoffset: 280;
    transform: rotate(0deg);
  }
  50% {
    stroke-dashoffset: 75;
    transform: rotate(135deg);
  }
  100% {
    stroke-dashoffset: 280;
    transform: rotate(450deg);
  }
}

/* ===== Material Design 3 对话框 ===== */
.md-dialog {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background-color: rgba(0, 0, 0, 0.32);
  z-index: 10000;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-decelerate);
}

.md-dialog.open {
  opacity: 1;
  visibility: visible;
}

.md-dialog-container {
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 560px;
  max-height: calc(100vh - 48px);
  background-color: var(--md-surface);
  border-radius: var(--shape-corner-extra-large);
  box-shadow: var(--shadow-5);
  transform: scale(0.8);
  transition: var(--transition-decelerate);
  overflow: hidden;
}

.md-dialog.open .md-dialog-container {
  transform: scale(1);
}

.md-dialog-header {
  padding: 24px 24px 0;
}

.md-dialog-title {
  font-size: var(--typescale-headline-small);
  font-weight: 500;
  line-height: 1.3333333333;
  color: var(--md-on-surface);
}

.md-dialog-content {
  padding: 20px 24px;
  flex-grow: 1;
  overflow-y: auto;
  color: var(--md-on-surface-variant);
}

.md-dialog-actions {
  display: flex;
  justify-content: flex-end;
  padding: 16px 24px 24px;
  gap: 8px;
}

/* ===== Material Design 3 提示条 ===== */
.md-snackbar {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%) translateY(100%);
  display: flex;
  align-items: center;
  min-width: 344px;
  max-width: 672px;
  min-height: 48px;
  padding: 14px 16px;
  background-color: var(--md-inverse-surface);
  color: var(--md-inverse-on-surface);
  border-radius: var(--shape-corner-extra-small);
  box-shadow: var(--shadow-3);
  z-index: 10000;
  transition: var(--transition-decelerate);
}

.md-snackbar.open {
  transform: translateX(-50%) translateY(0);
}

.md-snackbar-action {
  margin-left: auto;
  margin-right: -8px;
  color: var(--md-inverse-primary);
  background: none;
  border: none;
  font-size: var(--typescale-label-large);
  font-weight: 500;
  text-transform: uppercase;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--shape-corner-small);
  transition: var(--transition-standard);
}

.md-snackbar-action:hover {
  background-color: rgba(203, 178, 255, 0.08);
}

/* ===== Material Design 3 列表 ===== */
.md-list {
  display: flex;
  flex-direction: column;
  background-color: var(--md-surface);
  border-radius: var(--shape-corner-medium);
  overflow: hidden;
}

.md-list-item {
  display: flex;
  align-items: center;
  min-height: 56px;
  padding: 16px 24px;
  text-decoration: none;
  color: var(--md-on-surface);
  transition: var(--transition-standard);
  cursor: pointer;
}

.md-list-item:hover {
  background-color: var(--md-surface-variant);
}

.md-list-item:active {
  background-color: var(--md-surface-container-high);
}

.md-list-item .material-icons {
  margin-right: 16px;
  color: var(--md-on-surface-variant);
}

.md-list-item.two-line {
  min-height: 72px;
  flex-direction: column;
  align-items: flex-start;
  padding: 16px 24px;
}

.md-list-item.two-line .md-list-item-text {
  display: flex;
  flex-direction: column;
  width: 100%;
}

.md-list-item-title {
  font-size: var(--typescale-body-large);
  font-weight: 500;
  line-height: 1.4285714286;
  margin-bottom: 2px;
}

.md-list-item-supporting-text {
  font-size: var(--typescale-body-medium);
  color: var(--md-on-surface-variant);
  line-height: 1.4285714286;
}

/* ===== Material Design 3 分割线 ===== */
.md-divider {
  height: 1px;
  background-color: var(--md-outline-variant);
  margin: 0;
  border: none;
}

.md-divider.inset {
  margin-left: 72px;
}

/* ===== Material Design 3 排版系统 ===== */
.display-large {
  font-size: var(--typescale-display-large);
  line-height: 1.123;
  font-weight: 400;
  letter-spacing: -0.25px;
}

.display-medium {
  font-size: var(--typescale-display-medium);
  line-height: 1.155;
  font-weight: 400;
  letter-spacing: 0;
}

.display-small {
  font-size: var(--typescale-display-small);
  line-height: 1.222;
  font-weight: 400;
  letter-spacing: 0;
}

.headline-large {
  font-size: var(--typescale-headline-large);
  line-height: 1.25;
  font-weight: 400;
  letter-spacing: 0;
}

.headline-medium {
  font-size: var(--typescale-headline-medium);
  line-height: 1.285;
  font-weight: 400;
  letter-spacing: 0;
}

.headline-small {
  font-size: var(--typescale-headline-small);
  line-height: 1.333;
  font-weight: 400;
  letter-spacing: 0;
}

.title-large {
  font-size: var(--typescale-title-large);
  line-height: 1.375;
  font-weight: 500;
  letter-spacing: 0;
}

.title-medium {
  font-size: var(--typescale-title-medium);
  line-height: 1.428;
  font-weight: 500;
  letter-spacing: 0.15px;
}

.title-small {
  font-size: var(--typescale-title-small);
  line-height: 1.428;
  font-weight: 500;
  letter-spacing: 0.1px;
}

.body-large {
  font-size: var(--typescale-body-large);
  line-height: 1.5;
  font-weight: 400;
  letter-spacing: 0.5px;
}

.body-medium {
  font-size: var(--typescale-body-medium);
  line-height: 1.428;
  font-weight: 400;
  letter-spacing: 0.25px;
}

.body-small {
  font-size: var(--typescale-body-small);
  line-height: 1.333;
  font-weight: 400;
  letter-spacing: 0.4px;
}

.label-large {
  font-size: var(--typescale-label-large);
  line-height: 1.428;
  font-weight: 500;
  letter-spacing: 0.1px;
  text-transform: uppercase;
}

.label-medium {
  font-size: var(--typescale-label-medium);
  line-height: 1.333;
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.label-small {
  font-size: var(--typescale-label-small);
  line-height: 1.454;
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

/* ===== Material Design 3 小说库专用样式 ===== */

/* 容器和页面头部 */
.md-container {
  width: 100%;
  max-width: var(--container-max, 1280px);
  margin: 0 auto;
  padding: 0 1rem;
}

.md-page-header {
  padding: 2rem 0;
  text-align: center;
  margin-bottom: 2rem;
}

/* 筛选器区域 */
.md-filters-section {
  background-color: var(--md-surface-container);
  border-radius: var(--shape-corner-large);
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-1);
}

.md-filter-row {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.md-filter-group {
  flex: 1;
  min-width: 200px;
}

.md-filter-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--md-on-surface);
}

.md-filter-group .md-text-field {
  width: 100%;
}

.md-filter-group .md-text-field-input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--md-outline);
  border-radius: var(--shape-corner-small);
  background-color: var(--md-surface);
  font-size: var(--typescale-body-medium);
  transition: var(--transition-standard);
}

.md-filter-group .md-text-field-input:focus {
  border-color: var(--md-primary);
  outline: none;
  box-shadow: 0 0 0 2px rgba(98, 0, 238, 0.12);
}

/* 结果信息 */
.md-results-info {
  margin-bottom: 1.5rem;
  padding: 1rem;
  background-color: var(--md-surface-container-low);
  border-radius: var(--shape-corner-medium);
  text-align: center;
}

/* 小说网格布局 */
.md-novels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

/* 小说卡片 */
.md-novel-card {
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: var(--transition-standard);
}

.md-novel-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-3);
}

.md-novel-cover {
  display: block;
  position: relative;
  aspect-ratio: 3/4;
  overflow: hidden;
  border-radius: var(--shape-corner-medium) var(--shape-corner-medium) 0 0;
}

.md-novel-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-standard);
}

.md-novel-card:hover .md-novel-cover img {
  transform: scale(1.05);
}

.md-cover-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--md-surface-container-low);
  font-size: 3rem;
  color: var(--md-on-surface-variant);
}

.md-novel-title {
  margin: 0 0 0.5rem 0;
  line-height: 1.3;
}

.md-novel-title a {
  color: var(--md-on-surface);
  text-decoration: none;
  transition: var(--transition-standard);
}

.md-novel-title a:hover {
  color: var(--md-primary);
}

.md-novel-author {
  margin: 0 0 0.75rem 0;
  color: var(--md-primary);
}

.md-novel-author a {
  color: var(--md-primary);
  text-decoration: none;
  font-weight: 500;
}

.md-novel-author a:hover {
  text-decoration: underline;
}

.md-novel-category {
  margin-bottom: 0.75rem;
}

.md-novel-desc {
  margin: 0 0 1rem 0;
  color: var(--md-on-surface-variant);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.md-novel-meta {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.md-novel-stats {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--md-outline-variant);
}

/* 分页 */
.md-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin: 2rem 0;
  flex-wrap: wrap;
}

.md-pagination-info {
  color: var(--md-on-surface-variant);
  white-space: nowrap;
}

/* 空状态 */
.md-empty-state {
  text-align: center;
  padding: 3rem 1rem;
  background-color: var(--md-surface-container-low);
  border-radius: var(--shape-corner-large);
  margin: 2rem 0;
}

.md-empty-state-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
  opacity: 0.6;
}

.md-empty-state-title {
  margin: 0 0 0.5rem 0;
  color: var(--md-on-surface);
}

.md-empty-state-desc {
  color: var(--md-on-surface-variant);
  margin: 0;
}

/* 响应式设计 */
@media (max-width: 767px) {
  .md-filter-row {
    flex-direction: column;
    gap: 1rem;
  }
  
  .md-filter-group {
    min-width: auto;
  }
  
  .md-novels-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .md-pagination {
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .md-novel-meta,
  .md-novel-stats {
    gap: 0.5rem;
  }
}

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

/* ===== Material Design 3 实用工具类 ===== */
.md-elevation-0 { box-shadow: none; }
.md-elevation-1 { box-shadow: var(--shadow-1); }
.md-elevation-2 { box-shadow: var(--shadow-2); }
.md-elevation-3 { box-shadow: var(--shadow-3); }
.md-elevation-4 { box-shadow: var(--shadow-4); }
.md-elevation-5 { box-shadow: var(--shadow-5); }

.md-rounded-none { border-radius: var(--shape-corner-none); }
.md-rounded-xs { border-radius: var(--shape-corner-extra-small); }
.md-rounded-sm { border-radius: var(--shape-corner-small); }
.md-rounded-md { border-radius: var(--shape-corner-medium); }
.md-rounded-lg { border-radius: var(--shape-corner-large); }
.md-rounded-xl { border-radius: var(--shape-corner-extra-large); }
.md-rounded-full { border-radius: var(--shape-corner-full); }

.md-transition-standard { transition: var(--transition-standard); }
.md-transition-decelerate { transition: var(--transition-decelerate); }
.md-transition-accelerate { transition: var(--transition-accelerate); }

/* 响应式工具类 */
.desktop-only { display: none; }
.mobile-only { display: none; }

@media (min-width: 768px) {
  .desktop-only { display: flex; }
  .mobile-only { display: none; }
  .md-hide-tablet-up { display: none !important; }
}

@media (max-width: 767px) {
  .desktop-only { display: none !important; }
  .mobile-only { display: flex !important; }
  .md-hide-mobile { display: none !important; }
  
  /* 移动端优化 */
  .md-top-app-bar {
    padding: 0 12px;
  }
  
  .md-top-app-bar-title {
    font-size: var(--typescale-title-medium);
  }
  
  .md-navigation.main-nav {
    display: none;
  }
  
  /* 确保移动端导航可见 */
  .md-navigation.mobile-nav {
    display: flex !important;
  }
}

/* 波纹效果 */
.md-ripple {
  position: absolute;
  border-radius: 50%;
  background-color: currentColor;
  opacity: 0.12;
  transform: scale(0);
  animation: md-ripple-animation 600ms ease-out;
  pointer-events: none;
}

@keyframes md-ripple-animation {
  0% {
    transform: scale(0);
    opacity: 0.12;
  }
  50% {
    transform: scale(1.5);
    opacity: 0.08;
  }
  100% {
    transform: scale(2);
    opacity: 0;
  }
}

/* ===== Material Design 3 暗色主题支持 ===== */
@media (prefers-color-scheme: dark) {
  :root {
    --md-surface: #1c1b1f;
    --md-surface-dim: #141316;
    --md-surface-bright: #3a383c;
    --md-surface-container-lowest: #0f0e11;
    --md-surface-container-low: #1c1b1f;
    --md-surface-container: #201f23;
    --md-surface-container-high: #2b292d;
    --md-surface-container-highest: #363438;
    --md-on-surface: #e6e1e5;
    --md-on-surface-variant: #cac4d0;
    --md-outline: #938f99;
    --md-outline-variant: #49454f;
  }
}

/* 强制暗色主题 */
.md-theme-dark {
  --md-surface: #1c1b1f;
  --md-surface-dim: #141316;
  --md-surface-bright: #3a383c;
  --md-surface-container-lowest: #0f0e11;
  --md-surface-container-low: #1c1b1f;
  --md-surface-container: #201f23;
  --md-surface-container-high: #2b292d;
  --md-surface-container-highest: #363438;
  --md-on-surface: #e6e1e5;
  --md-on-surface-variant: #cac4d0;
  --md-outline: #938f99;
  --md-outline-variant: #49454f;
}

/* ===== AI小说网专属组件 ===== */

/* Hero 区域 */
.md-hero {
  background: linear-gradient(135deg, var(--md-primary-container) 0%, var(--md-secondary-container) 100%);
  padding: 4rem 0;
  text-align: center;
}

.md-hero-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1rem;
}

.md-hero-title {
  color: var(--md-on-primary-container);
  margin-bottom: 1rem;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.md-hero-subtitle {
  color: var(--md-on-primary-container);
  margin-bottom: 1.5rem;
  opacity: 0.9;
}

.md-hero-description {
  color: var(--md-on-primary-container);
  margin-bottom: 3rem;
  opacity: 0.8;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.md-hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 2rem;
  max-width: 800px;
  margin: 0 auto;
}

.md-stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.stat-number {
  color: var(--md-primary);
  font-weight: 500;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.stat-label {
  color: var(--md-on-primary-container);
  opacity: 0.8;
}

/* 分类网格 */
.md-categories-section {
  padding: 3rem 0;
  background-color: var(--md-surface);
}

.md-categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1.5rem;
}

.md-category-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1rem;
  background: var(--md-surface-container);
  border-radius: var(--shape-corner-large);
  text-align: center;
  transition: var(--transition-standard);
  box-shadow: var(--shadow-1);
  text-decoration: none;
  color: var(--md-on-surface);
  position: relative;
  overflow: hidden;
}

.md-category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--md-primary);
  opacity: 0;
  transition: var(--transition-standard);
}

.md-category-card:hover {
  box-shadow: var(--shadow-3);
  transform: translateY(-4px);
}

.md-category-card:hover::before {
  opacity: 0.08;
}

.md-category-card:hover .category-name,
.md-category-card:hover .category-count {
  color: var(--md-primary);
  position: relative;
  z-index: 1;
}

.category-icon {
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
}

.category-name {
  margin-bottom: 0.5rem;
  position: relative;
  z-index: 1;
  transition: var(--transition-standard);
}

.category-count {
  position: relative;
  z-index: 1;
  transition: var(--transition-standard);
  opacity: 0.7;
}

/* 小说卡片网格 */
.md-novels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.md-featured-grid {
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
}

.md-novel-card {
  height: 100%;
  display: flex;
  flex-direction: column;
}

.md-novel-card.featured {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 0;
}

.md-novel-card.featured .novel-cover {
  height: 100%;
  aspect-ratio: auto;
}

.md-novel-card .novel-cover {
  display: block;
  aspect-ratio: 3/4;
  overflow: hidden;
  background: var(--md-surface-container-highest);
}

.md-novel-card .novel-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-standard);
}

.md-novel-card:hover .novel-cover img {
  transform: scale(1.05);
}

.cover-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--md-on-surface-variant);
  background: var(--md-surface-container);
}

.novel-title a {
  color: var(--md-on-surface);
  text-decoration: none;
  transition: var(--transition-standard);
}

.novel-title a:hover {
  color: var(--md-primary);
}

.novel-author a {
  color: var(--md-on-surface-variant);
  text-decoration: none;
  transition: var(--transition-standard);
}

.novel-author a:hover {
  color: var(--md-primary);
}

.novel-desc {
  color: var(--md-on-surface-variant);
  margin: 0.75rem 0;
  line-height: 1.5;
}

.novel-meta {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin: 0.75rem 0;
}

.md-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  background: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
  border-radius: var(--shape-corner-full);
  font-size: var(--typescale-label-medium);
  font-weight: 500;
  transition: var(--transition-standard);
}

.md-chip:hover {
  background: var(--md-secondary);
  color: var(--md-on-secondary);
}

.novel-stats {
  display: flex;
  gap: 1rem;
  margin-top: auto;
  padding-top: 0.75rem;
}

.stat {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  color: var(--md-on-surface-variant);
}

/* 特色区域 */
.md-featured-section,
.md-novels-section {
  padding: 3rem 0;
  background-color: var(--md-surface);
}

.section-title {
  text-align: center;
  margin-bottom: 2rem;
  color: var(--md-on-surface);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.view-more {
  color: var(--md-primary);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition-standard);
}

.view-more:hover {
  color: var(--md-primary-variant);
  text-decoration: underline;
}

/* 响应式调整 */
@media (max-width: 767px) {
  .md-hero {
    padding: 2rem 0;
  }
  
  .md-hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }
  
  .md-categories-grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1rem;
  }
  
  .md-novels-grid {
    grid-template-columns: 1fr;
  }
  
  .md-featured-grid {
    grid-template-columns: 1fr;
  }
  
  .md-novel-card.featured {
    grid-template-columns: 1fr;
  }
  
  .md-novel-card.featured .novel-cover {
    aspect-ratio: 3/4;
    height: auto;
  }
  
  .section-header {
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }
}