/* ============================================
   DeepDrama 全流程创作综合服务平台 - 公共样式
   ============================================ */

/* ========== CSS 变量 ========== */
:root {
  /* 主色系 */
  --color-primary: #7C3AED;
  --color-primary-light: #A78BFA;
  --color-primary-dark: #5B21B6;

  /* 渐变色 */
  --gradient-primary: linear-gradient(135deg, #7C3AED 0%, #2563EB  50%, #F59E0B 100%);
  --gradient-hero: linear-gradient(135deg, #7C3AED 0%, #2563EB  100%);
  --gradient-orange: linear-gradient(135deg, #F59E0B 0%, #EF4444  100%);
  --gradient-blue: linear-gradient(135deg, #2563EB 0%, #06B6D4  100%);

  /* 功能色 */
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-danger: #EF4444;
  --color-info: #3B82F6;

  /* 中性色 */
  --color-dark: #1E1B4B;
  --color-text: #374151;
  --color-text-light: #6B7280;
  --color-text-lighter: #9CA3AF;
  --color-bg: #F8FAFC;
  --color-white: #FFFFFF;
  --color-border: #E5E7EB;
  --color-border-light: #F3F4F6;

  /* 间距 */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
  --shadow-xl: 0 20px 40px rgba(0,0,0,0.15);
  --shadow-primary: 0 4px 20px rgba(124, 58, 237, 0.3);
  --shadow-card: 0 2px 12px rgba(124, 58, 237, 0.08);

  /* 过渡 */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.4s ease;

  /* 字体 */
  --font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 13px;
  --font-size-base: 14px;
  --font-size-md: 15px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 20px;
  --font-size-3xl: 24px;
  --font-size-4xl: 30px;
  --font-size-5xl: 36px;

  /* 布局 */
  --container-max: 1280px;
  --nav-height: 64px;
}

/* ========== 重置 & 基础 ========== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 14px;
}

body {
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-fast);
}

ul, ol {
  list-style: none;
}

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

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

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

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

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

.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.section-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-md);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 10px 24px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-base);
  font-weight: 600;
  transition: all var(--transition-normal);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background var(--transition-fast);
}

.btn:hover::before {
  background: rgba(255,255,255,0.1);
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(124, 58, 237, 0.4);
}

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

.btn-secondary:hover {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.btn-orange {
  background: var(--gradient-orange);
  color: var(--color-white);
  box-shadow: 0 4px 15px rgba(245, 158, 11, 0.35);
}

.btn-orange:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.45);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary-light);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-ghost {
  background: rgba(124, 58, 237, 0.08);
  color: var(--color-primary);
}

.btn-ghost:hover {
  background: rgba(124, 58, 237, 0.15);
}

.btn-sm {
  padding: 6px 14px;
  font-size: var(--font-size-sm);
}

.btn-lg {
  padding: 14px 32px;
  font-size: var(--font-size-lg);
}

.btn-block {
  width: 100%;
}

/* ========== 导航栏 ========== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(124, 58, 237, 0.08);
  z-index: 1000;
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
  height: 60px;
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-xl);
  font-weight: 700;
}

.navbar-brand .logo-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 20px;
}

.navbar-brand .logo-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.navbar-nav a {
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text);
  transition: all var(--transition-fast);
  position: relative;
}

.navbar-nav a:hover,
.navbar-nav a.active {
  color: var(--color-primary);
  background: rgba(124, 58, 237, 0.08);
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.navbar-actions .btn-login {
  font-weight: 500;
  color: var(--color-text);
}

.navbar-actions .btn-login:hover {
  color: var(--color-primary);
}

/* 移动端菜单按钮 */
.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}

.navbar-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* ========== Hero 区域 ========== */
.hero {
  position: relative;
  min-height: 600px;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(237, 233, 254, 0.8) 0%, rgba(219, 234, 254, 0.8) 40%, rgba(254, 243, 199, 0.8) 100%);
  z-index: 0;
}

.hero::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.15) 0%, transparent 70%);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  color: var(--color-dark);
  line-height: 1.2;
  margin-bottom: var(--space-lg);
}

.hero-title .highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: var(--font-size-xl);
  color: var(--color-text-light);
  margin-bottom: var(--space-xl);
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: var(--space-2xl);
  margin-top: var(--space-2xl);
}

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

.hero-stat-value {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-top: 2px;
}

/* ========== 卡片通用 ========== */
.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: all var(--transition-normal);
  border: 1px solid rgba(124, 58, 237, 0.06);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(124, 58, 237, 0.15);
  border-color: rgba(124, 58, 237, 0.15);
}

.card-image {
  width: 100%;
  height: 180px;
  background: linear-gradient(135deg, #E0E7FF, #EDE9FE);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  color: var(--color-primary-light);
  overflow: hidden;
  position: relative;
}

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

.card-body {
  padding: var(--space-lg);
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: var(--space-sm);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--color-border-light);
}

/* ========== 标签 ========== */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  gap: 4px;
}

.tag-free {
  background: rgba(16, 185, 129, 0.1);
  color: var(--color-success);
}

.tag-vip {
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.12), rgba(245, 158, 11, 0.12));
  color: var(--color-primary);
}

.tag-hot {
  background: rgba(239, 68, 68, 0.1);
  color: var(--color-danger);
}

.tag-new {
  background: rgba(59, 130, 246, 0.1);
  color: var(--color-info);
}

.tag-noble {
  background: linear-gradient(135deg, #7C3AED, #F59E0B);
  color: white;
}

/* ========== Tab 切换 ========== */
.tabs {
  display: flex;
  gap: var(--space-sm);
  border-bottom: 2px solid var(--color-border-light);
  margin-bottom: var(--space-xl);
  overflow-x: auto;
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.tabs::-webkit-scrollbar {
  display: none;
}

.tab-item {
  padding: 10px 20px;
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text-light);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.tab-item:hover {
  color: var(--color-primary);
  background: rgba(124, 58, 237, 0.05);
}

.tab-item.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: 600;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ========== 筛选器 ========== */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  align-items: center;
}

.filter-bar .filter-label {
  font-weight: 600;
  color: var(--color-text);
  margin-right: var(--space-sm);
}

.filter-chip {
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  background: var(--color-white);
  color: var(--color-text-light);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-chip:hover {
  border-color: var(--color-primary-light);
  color: var(--color-primary);
}

.filter-chip.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

/* ========== 网格布局 ========== */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-lg); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-lg); }
.grid-5 { display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--space-lg); }

/* ========== Toast 提示 ========== */
.toast-container {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  pointer-events: none;
}

.toast {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 12px 20px;
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-base);
  font-weight: 500;
  min-width: 280px;
  max-width: 420px;
  animation: toastIn 0.3s ease, toastOut 0.3s ease forwards;
  animation-delay: 0s, 2.7s;
  border-left: 4px solid var(--color-primary);
}

.toast.toast-success { border-left-color: var(--color-success); }
.toast.toast-warning { border-left-color: var(--color-warning); }
.toast.toast-error { border-left-color: var(--color-danger); }
.toast.toast-info { border-left-color: var(--color-info); }

.toast-icon {
  font-size: 18px;
  flex-shrink: 0;
}

.toast-success .toast-icon { color: var(--color-success); }
.toast-warning .toast-icon { color: var(--color-warning); }
.toast-error .toast-icon { color: var(--color-danger); }
.toast-info .toast-icon { color: var(--color-info); }

@keyframes toastIn {
  from { opacity: 0; transform: translateY(-20px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateY(0) scale(1); }
  to { opacity: 0; transform: translateY(-10px) scale(0.95); }
}

/* ========== Footer ========== */
.footer {
  background: var(--color-dark);
  color: rgba(255,255,255,0.7);
  margin-top: var(--space-3xl);
}

.footer-main {
  padding: var(--space-3xl) 0 var(--space-2xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(4, 1fr);
  gap: var(--space-2xl);
}

.footer-brand {
  padding-right: var(--space-xl);
}

.footer-brand .logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: white;
  margin-bottom: var(--space-md);
}

.footer-brand .logo-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.footer-brand p {
  font-size: var(--font-size-sm);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}

.footer-social {
  display: flex;
  gap: var(--space-md);
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: var(--color-primary);
  transform: translateY(-2px);
}

.footer-col h4 {
  color: white;
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: var(--space-lg);
}

.footer-col ul li {
  margin-bottom: var(--space-sm);
}

.footer-col ul li a {
  font-size: var(--font-size-sm);
  color: rgba(255,255,255,0.6);
  transition: all var(--transition-fast);
}

.footer-col ul li a:hover {
  color: white;
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: var(--space-lg) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-bottom p {
  font-size: var(--font-size-xs);
  color: rgba(255,255,255,0.4);
}

.footer-bottom .footer-links {
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.footer-bottom .footer-links a {
  font-size: var(--font-size-xs);
  color: rgba(255,255,255,0.4);
  transition: color var(--transition-fast);
}

.footer-bottom .footer-links a:hover {
  color: rgba(255,255,255,0.8);
}

/* ========== 表单 ========== */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: var(--color-white);
  transition: all var(--transition-fast);
}

.form-input:focus {
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

.form-input.error {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-error {
  font-size: var(--font-size-xs);
  color: var(--color-danger);
  margin-top: 4px;
  display: none;
}

.form-error.show {
  display: block;
}

.form-hint {
  font-size: var(--font-size-xs);
  color: var(--color-text-lighter);
  margin-top: 4px;
}

.form-checkbox {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
}

.form-checkbox input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--color-primary);
}

/* ========== 页面标题区 ========== */
.page-header {
  background: linear-gradient(135deg, #EDE9FE 0%, #DBEAFE 50%, #FEF3C7 100%);
  padding: calc(var(--nav-height) + var(--space-3xl)) 0 var(--space-2xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.1) 0%, transparent 70%);
}

.page-header h1 {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: var(--space-sm);
  position: relative;
}

.page-header p {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  position: relative;
}

/* ========== 面包屑 ========== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

.breadcrumb a {
  color: var(--color-text-light);
}

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

.breadcrumb-sep {
  color: var(--color-border);
}

/* ========== 空状态 ========== */
.empty-state {
  text-align: center;
  padding: var(--space-3xl);
  color: var(--color-text-light);
}

.empty-state-icon {
  font-size: 64px;
  margin-bottom: var(--space-lg);
  opacity: 0.5;
}

.empty-state h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

/* ========== 加载动画 ========== */
.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto;
}

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

/* ========== 轮播 ========== */
.carousel {
  position: relative;
  overflow: hidden;
}

.carousel-track {
  display: flex;
  transition: transform 0.5s ease;
}

.carousel-slide {
  flex: 0 0 100%;
}

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.carousel-dot.active {
  width: 24px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
}

.carousel-arrows {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 100%;
  display: flex;
  justify-content: space-between;
  pointer-events: none;
  padding: 0 var(--space-sm);
}

.carousel-arrow {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.9);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  pointer-events: all;
  transition: all var(--transition-fast);
  font-size: 18px;
  color: var(--color-text);
}

.carousel-arrow:hover {
  background: var(--color-primary);
  color: white;
}

/* ========== 工具类 ========== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-primary { color: var(--color-primary); }
.text-warning { color: var(--color-warning); }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }
.text-muted { color: var(--color-text-light); }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mt-4 { margin-top: var(--space-xl); }
.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.mb-4 { margin-bottom: var(--space-xl); }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-1 { gap: var(--space-sm); }
.gap-2 { gap: var(--space-md); }
.gap-3 { gap: var(--space-lg); }
.hidden { display: none !important; }
.visible { visibility: visible; }
.invisible { visibility: hidden; }
.overflow-hidden { overflow: hidden; }
.relative { position: relative; }
.absolute { position: absolute; }

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

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

/* ========== 滚动条美化 ========== */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary-light);
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(3, 1fr); }
  .grid-5 { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-brand { grid-column: span 3; padding-right: 0; }
  .hero-title { font-size: var(--font-size-4xl); }
}

@media (max-width: 768px) {
  :root { --space-3xl: 48px; --space-2xl: 32px; }
  .grid-2, .grid-3, .grid-4, .grid-5 { grid-template-columns: repeat(2, 1fr); }
  .navbar-nav { display: none; }
  .navbar-toggle { display: flex; }
  .hero { min-height: auto; padding: calc(var(--nav-height) + 40px) 0 60px; }
  .hero-title { font-size: var(--font-size-3xl); }
  .hero-desc { font-size: var(--font-size-base); }
  .hero-stats { gap: var(--space-lg); }
  .hero-stat-value { font-size: var(--font-size-3xl); }
  .section-title { font-size: var(--font-size-3xl); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-brand { grid-column: span 2; }
  .page-header h1 { font-size: var(--font-size-3xl); }
  .page-header { padding: calc(var(--nav-height) + 40px) 0 40px; }
  .tabs { flex-wrap: nowrap; overflow-x: auto; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .grid-2, .grid-3, .grid-4, .grid-5 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: span 1; }
  .hero-title { font-size: var(--font-size-2xl); }
  .hero-actions .btn { width: 100%; }
}

/* ========== 动画辅助 ========== */
.animate-fadeInUp {
  animation: fadeInUp 0.6s ease forwards;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }
.stagger-6 { animation-delay: 0.6s; }