/* ============================================================
   黄色仓库 - 黄色仓库仓储物流管理SaaS平台 主样式表
   版本: 1.0.0
   描述: 基于CSS变量的企业级SaaS平台设计系统
   ============================================================ */

/* === CSS 变量定义（设计令牌） === */
:root {
  /* 主色调 */
  --primary: #1565C0;
  --secondary: #0D47A1;
  
  /* 背景与容器 */
  --bg: #ECEFF1;
  --card-bg: #FFFFFF;
  
  /* 强调与交互 */
  --accent: #1976D2;
  
  /* 文本颜色 */
  --text: #263238;
  --text-light: #546E7A;
  --text-inverse: #FFFFFF;
  
  /* 状态与反馈色 */
  --success: #2E7D32;
  --success-bg: #E8F5E9;
  --warning: #F57F17;
  --warning-bg: #FFFDE7;
  --danger: #C62828;
  --danger-bg: #FFEBEE;
  --info: #0277BD;
  
  /* 边框与分割线 */
  --border: #CFD8DC;
  --border-light: #E0E0E0;
  
  /* 阴影体系 */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  
  /* 间距系统 */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
  
  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  
  /* 侧边栏宽度 */
  --sidebar-width: 240px;
  --sidebar-collapsed: 64px;
  --header-height: 60px;
}

/* === 全局重置与基础样式 === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  color: var(--text);
  background-color: var(--bg);
  line-height: 1.6;
  overflow-x: hidden;
}

/* 等宽字体（数字与代码） */
.font-mono {
  font-family: "Roboto Mono", "Courier New", Courier, monospace;
}

/* === 通用工具类 === */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-fluid {
  width: 100%;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: var(--spacing-3xl) 0;
}

.section--dark {
  background-color: var(--secondary);
  color: var(--text-inverse);
}

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

/* === 排版系统 === */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--text);
}

h1 { font-size: 2.5rem; margin-bottom: var(--spacing-lg); }
h2 { font-size: 2rem; margin-bottom: var(--spacing-md); }
h3 { font-size: 1.5rem; margin-bottom: var(--spacing-md); }
h4 { font-size: 1.25rem; margin-bottom: var(--spacing-sm); }
h5 { font-size: 1.125rem; margin-bottom: var(--spacing-sm); }
h6 { font-size: 1rem; margin-bottom: var(--spacing-sm); }

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-light);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s ease-in-out;
}

a:hover {
  color: var(--secondary);
}

/* === 按钮组件 === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 12px 24px;
  border: none;
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease-in-out;
  text-decoration: none;
  line-height: 1.5;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: translateY(0);
}

.btn--primary {
  background-color: var(--primary);
  color: var(--text-inverse);
}

.btn--primary:hover {
  background-color: var(--secondary);
  color: var(--text-inverse);
}

.btn--secondary {
  background-color: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn--secondary:hover {
  background-color: var(--primary);
  color: var(--text-inverse);
}

.btn--ghost {
  background-color: rgba(255,255,255,0.1);
  color: var(--text-inverse);
  border: 1px solid rgba(255,255,255,0.3);
}

.btn--ghost:hover {
  background-color: rgba(255,255,255,0.2);
  color: var(--text-inverse);
}

.btn--lg {
  padding: 16px 32px;
  font-size: 1.0625rem;
}

.btn--sm {
  padding: 8px 16px;
  font-size: 0.8125rem;
}

/* === 导航栏（营销页面顶部） === */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-light);
  z-index: 1000;
  display: flex;
  align-items: center;
  padding: 0 var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.navbar__brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
}

.navbar__brand-icon {
  width: 36px;
  height: 36px;
  background-color: var(--primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.125rem;
}

.navbar__nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  margin-left: auto;
  list-style: none;
}

.navbar__link {
  color: var(--text);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: color 0.2s;
  text-decoration: none;
}

.navbar__link:hover {
  color: var(--primary);
}

.navbar__actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-left: var(--spacing-xl);
}

/* 移动端菜单按钮 */
.navbar__toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text);
}

/* === Hero 首屏英雄区 === */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--header-height) + var(--spacing-3xl)) var(--spacing-lg) var(--spacing-3xl);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

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

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13, 71, 161, 0.85) 0%, rgba(21, 101, 192, 0.75) 100%);
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero__title {
  font-size: 3rem;
  font-weight: 800;
  color: var(--text-inverse);
  margin-bottom: var(--spacing-lg);
  line-height: 1.2;
}

.hero__subtitle {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-xl);
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* === 功能矩阵卡片 === */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}

.feature-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.feature-card__icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  color: white;
  font-size: 1.5rem;
}

.feature-card__title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text);
}

.feature-card__desc {
  font-size: 0.875rem;
  color: var(--text-light);
  line-height: 1.6;
}

.feature-card__link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: var(--spacing-md);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
}

/* === KPI 指标卡片 === */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--spacing-md);
}

.kpi-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
}

.kpi-card__title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-light);
  margin-bottom: var(--spacing-sm);
}

.kpi-card__value {
  font-family: "Roboto Mono", monospace;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: var(--spacing-xs);
}

.kpi-card__trend {
  font-size: 0.8125rem;
  display: flex;
  align-items: center;
  gap: 4px;
}

.kpi-card__trend--up {
  color: var(--success);
}

.kpi-card__trend--down {
  color: var(--danger);
}

/* === 数据仪表盘布局 === */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--spacing-lg);
}

.dashboard-grid .span-full { grid-column: span 12; }
.dashboard-grid .span-8 { grid-column: span 8; }
.dashboard-grid .span-6 { grid-column: span 6; }
.dashboard-grid .span-4 { grid-column: span 4; }
.dashboard-grid .span-3 { grid-column: span 3; }

/* === 时间线组件 === */
.timeline {
  position: relative;
  padding: var(--spacing-lg) 0;
}

.timeline--horizontal {
  display: flex;
  align-items: flex-start;
  overflow-x: auto;
  gap: 0;
}

.timeline__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  flex: 1;
  min-width: 120px;
  padding: 0 var(--spacing-md);
}

.timeline__node {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  position: relative;
  z-index: 2;
  border: 3px solid var(--border);
  background: var(--card-bg);
  color: var(--text-light);
}

.timeline__item--completed .timeline__node {
  border-color: var(--primary);
  background: var(--primary);
  color: var(--text-inverse);
}

.timeline__item--active .timeline__node {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--text-inverse);
  box-shadow: 0 0 0 4px rgba(25, 118, 210, 0.2);
  animation: pulse 2s infinite;
}

.timeline__item--error .timeline__node {
  border-color: var(--danger);
  background: var(--danger);
  color: var(--text-inverse);
}

.timeline__connector {
  position: absolute;
  top: 24px;
  left: calc(50% + 24px);
  right: calc(-50% + 24px);
  height: 3px;
  background: var(--border);
  z-index: 1;
}

.timeline__item--completed .timeline__connector {
  background: var(--primary);
}

.timeline__label {
  margin-top: var(--spacing-sm);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-light);
  text-align: center;
}

.timeline__item--active .timeline__label {
  color: var(--accent);
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(25, 118, 210, 0.2); }
  50% { box-shadow: 0 0 0 8px rgba(25, 118, 210, 0.1); }
}

/* === 表格组件 === */
.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.data-table thead {
  background: #F5F7FA;
}

.data-table th {
  padding: 12px 16px;
  text-align: left;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-light);
  border-bottom: 1px solid var(--border);
}

.data-table td {
  padding: 12px 16px;
  font-size: 0.875rem;
  border-bottom: 1px solid var(--border-light);
  color: var(--text);
}

.data-table tbody tr:hover {
  background-color: #F5F7FA;
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

/* === 状态标签 === */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge--success { background: var(--success-bg); color: var(--success); }
.badge--warning { background: var(--warning-bg); color: var(--warning); }
.badge--danger { background: var(--danger-bg); color: var(--danger); }
.badge--info { background: #E3F2FD; color: var(--info); }

/* === 侧边栏（后台页面） === */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--secondary);
  color: var(--text-inverse);
  z-index: 1001;
  display: flex;
  flex-direction: column;
  transition: width 0.3s ease;
  overflow-y: auto;
}

.sidebar__header {
  padding: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar__logo {
  width: 32px;
  height: 32px;
  background: var(--accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
}

.sidebar__title {
  font-size: 0.9375rem;
  font-weight: 700;
}

.sidebar__nav {
  flex: 1;
  padding: var(--spacing-md) 0;
}

.sidebar__item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: 10px var(--spacing-lg);
  color: rgba(255,255,255,0.7);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s;
  border-left: 3px solid transparent;
}

.sidebar__item:hover {
  background: rgba(255,255,255,0.05);
  color: var(--text-inverse);
}

.sidebar__item--active {
  background: rgba(255,255,255,0.1);
  color: var(--text-inverse);
  border-left-color: var(--accent);
}

.sidebar__icon {
  width: 20px;
  text-align: center;
  font-size: 1rem;
}

/* === 后台主内容区域 === */
.main-content {
  margin-left: var(--sidebar-width);
  padding: var(--spacing-lg);
  min-height: 100vh;
}

.main-content__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-light);
}

/* === 卡片容器 === */
.card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
}

.card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-light);
}

.card__title {
  font-size: 1rem;
  font-weight: 600;
}

/* === 代码块 === */
.code-block {
  background: #1E293B;
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  overflow-x: auto;
  position: relative;
}

.code-block pre {
  font-family: "Roboto Mono", monospace;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: #E2E8F0;
  margin: 0;
}

.code-block__copy {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.7);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s;
}

.code-block__copy:hover {
  background: rgba(255,255,255,0.2);
  color: white;
}

/* === 价格卡片 === */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  align-items: start;
}

.pricing-card {
  background: var(--card-bg);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  border: 2px solid var(--border-light);
  text-align: center;
  transition: all 0.3s;
}

.pricing-card--featured {
  border-color: var(--primary);
  transform: scale(1.02);
  box-shadow: var(--shadow-lg);
}

.pricing-card__name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.pricing-card__price {
  font-family: "Roboto Mono", monospace;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: var(--spacing-md);
}

.pricing-card__price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-light);
}

.pricing-card__features {
  list-style: none;
  text-align: left;
  margin-bottom: var(--spacing-xl);
}

.pricing-card__features li {
  padding: 8px 0;
  font-size: 0.875rem;
  color: var(--text-light);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.pricing-card__features li::before {
  content: "✓";
  color: var(--success);
  font-weight: 700;
}

/* === 页脚 === */
.footer {
  background: var(--secondary);
  color: var(--text-inverse);
  padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

.footer__brand {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.footer__desc {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.7;
}

.footer__title {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--spacing-md);
}

.footer__links {
  list-style: none;
}

.footer__links li {
  margin-bottom: var(--spacing-sm);
}

.footer__links a {
  color: rgba(255,255,255,0.7);
  font-size: 0.875rem;
  transition: color 0.2s;
  text-decoration: none;
}

.footer__links a:hover {
  color: white;
}

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer__copyright {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.5);
}

.footer__badges {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.footer__badges img {
  height: 32px;
  opacity: 0.7;
  transition: opacity 0.2s;
}

.footer__badges img:hover {
  opacity: 1;
}

/* === 面包屑导航 === */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.8125rem;
  color: var(--text-light);
  margin-bottom: var(--spacing-lg);
}

.breadcrumb a {
  color: var(--text-light);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--primary);
}

.breadcrumb__separator {
  color: var(--border);
}

/* === 搜索组件 === */
.search-modal {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(4px);
}

.search-modal.active {
  display: flex;
}

.search-modal__box {
  background: var(--card-bg);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 640px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.search-modal__input {
  width: 100%;
  padding: var(--spacing-lg);
  border: none;
  font-size: 1.125rem;
  outline: none;
  background: transparent;
}

.search-modal__results {
  border-top: 1px solid var(--border-light);
  max-height: 400px;
  overflow-y: auto;
  padding: var(--spacing-md);
}

/* === 标签页 === */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border-light);
  margin-bottom: var(--spacing-lg);
}

.tabs__item {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-light);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all 0.2s;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
}

.tabs__item:hover {
  color: var(--primary);
}

.tabs__item--active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.tab-content {
  display: none;
}

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

/* === Logo 墙 === */
.logo-wall {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-2xl);
  padding: var(--spacing-xl) 0;
}

.logo-wall img {
  height: 40px;
  filter: grayscale(100%);
  opacity: 0.5;
  transition: all 0.3s;
}

.logo-wall img:hover {
  filter: grayscale(0%);
  opacity: 1;
}

/* === CTA 转化区 === */
.cta-section {
  background: var(--secondary);
  padding: var(--spacing-3xl);
  border-radius: var(--radius-xl);
  text-align: center;
  color: var(--text-inverse);
}

.cta-section h2 {
  color: var(--text-inverse);
  margin-bottom: var(--spacing-md);
}

.cta-section p {
  color: rgba(255,255,255,0.8);
  max-width: 600px;
  margin: 0 auto var(--spacing-xl);
}

/* === 骨架屏加载 === */
.skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* === 流动光效动画 === */
@keyframes flow {
  0% { background-position: 0% 50%; }
  100% { background-position: 200% 50%; }
}

.flow-line {
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  background-size: 200% 100%;
  animation: flow 2s linear infinite;
}

/* === 响应式设计 === */
@media (max-width: 1024px) {
  .dashboard-grid .span-8,
  .dashboard-grid .span-6 { grid-column: span 12; }
  .dashboard-grid .span-4 { grid-column: span 6; }
  .dashboard-grid .span-3 { grid-column: span 6; }
  
  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --sidebar-width: 0px;
  }
  
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  
  .navbar__nav {
    display: none;
  }
  
  .navbar__toggle {
    display: block;
  }
  
  .hero__title {
    font-size: 2rem;
  }
  
  .hero__subtitle {
    font-size: 1rem;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  
  .dashboard-grid .span-8,
  .dashboard-grid .span-6,
  .dashboard-grid .span-4,
  .dashboard-grid .span-3 { grid-column: span 12; }
  
  .sidebar {
    transform: translateX(-100%);
  }
  
  .sidebar.active {
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .footer__grid {
    grid-template-columns: 1fr;
  }
  
  .footer__bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero__actions {
    flex-direction: column;
    align-items: center;
  }
  
  .btn--lg {
    width: 100%;
  }
  
  .kpi-grid {
    grid-template-columns: 1fr;
  }
}

/* === 打印样式 === */
@media print {
  .navbar, .sidebar, .footer, .btn {
    display: none !important;
  }
  
  .main-content {
    margin-left: 0 !important;
  }
}