/*
 * 易班工作站网站主样式文件
 * 包含全局样式、导航、布局等核心样式
 *
 * 主题色：蓝白渐变
 * 主蓝色：#2E7BFF
 * 渐变：linear-gradient(135deg, #667eea 0%, #764ba2 100%)
 */

/* ========================================
   CSS 变量定义 - 蓝白主题色彩体系
======================================== */
:root {
  /* 主蓝色系 */
  --primary-color: #2E7BFF;
  --primary-color-rgb: 46, 123, 255;
  --primary-light: #6BA3FF;
  --primary-lighter: #A4C7FF;
  --primary-lightest: #E6F1FF;
  --primary-dark: #1A5FB4;
  --primary-darker: #0F4A8C;

  /* 次要蓝色系 */
  --secondary-blue: #4F9CF9;
  --secondary-blue-light: #7BB3FA;
  --secondary-blue-dark: #3A8CE8;

  /* 渐变色彩 */
  --primary-gradient: linear-gradient(135deg, #2E7BFF 0%, #4F9CF9 100%);
  --primary-gradient-hover: linear-gradient(135deg, #1A5FB4 0%, #3A8CE8 100%);
  --blue-gradient: linear-gradient(45deg, #667eea 0%, #764ba2 100%);
  --ocean-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --sky-gradient: linear-gradient(135deg, #74b9ff 0%, #0984e3 100%);

  /* 功能色彩 */
  --success-color: #00b894;
  --success-light: #55efc4;
  --warning-color: #fdcb6e;
  --warning-light: #ffeaa7;
  --danger-color: #e84393;
  --danger-light: #fd79a8;
  --info-color: #74b9ff;
  --info-light: #a29bfe;

  /* 中性色系 */
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;

  /* 文字颜色 */
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;
  --text-light: #cbd5e1;
  --text-accent: var(--primary-color);

  /* 背景色 */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-dark: #1e293b;
  --bg-darker: #0f172a;
  --bg-overlay: rgba(15, 23, 42, 0.6);
  --bg-overlay-light: rgba(248, 250, 252, 0.9);
  --bg-glass: rgba(255, 255, 255, 0.1);
  --bg-glass-dark: rgba(30, 41, 59, 0.8);

  /* 边框和阴影 */
  --border-color: #e2e8f0;
  --border-color-light: #f1f5f9;
  --border-color-dark: #cbd5e1;
  --border-radius-sm: 4px;
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --border-radius-xl: 16px;
  --border-radius-full: 9999px;

  /* 阴影系统 */
  --shadow-xs: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(15, 23, 42, 0.1), 0 1px 2px -1px rgba(15, 23, 42, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.1), 0 2px 4px -2px rgba(15, 23, 42, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.1), 0 4px 6px -4px rgba(15, 23, 42, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(15, 23, 42, 0.25);
  --shadow-colored: 0 10px 30px rgba(46, 123, 255, 0.2);
  --shadow-colored-lg: 0 20px 40px rgba(46, 123, 255, 0.3);

  /* 间距系统 */
  --spacing-px: 1px;
  --spacing-0: 0;
  --spacing-1: 0.25rem;  /* 4px */
  --spacing-2: 0.5rem;   /* 8px */
  --spacing-3: 0.75rem;  /* 12px */
  --spacing-4: 1rem;     /* 16px */
  --spacing-5: 1.25rem;  /* 20px */
  --spacing-6: 1.5rem;   /* 24px */
  --spacing-8: 2rem;     /* 32px */
  --spacing-10: 2.5rem;  /* 40px */
  --spacing-12: 3rem;    /* 48px */
  --spacing-16: 4rem;    /* 64px */
  --spacing-20: 5rem;    /* 80px */
  --spacing-24: 6rem;    /* 96px */

  /* 补充缺失的间距变量 */
  --spacing-xs: 0.5rem;   /* 8px */
  --spacing-sm: 0.75rem;  /* 12px */
  --spacing-md: 1rem;     /* 16px */
  --spacing-lg: 1.5rem;   /* 24px */
  --spacing-xl: 2rem;     /* 32px */
  --spacing-2xl: 3rem;    /* 48px */

  /* 字体系统 */
  --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --font-family-heading: "Poppins", var(--font-family-base);
  --font-family-mono: "SF Mono", "Monaco", "Inconsolata", "Roboto Mono", monospace;

  --font-size-xs: 0.75rem;   /* 12px */
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-base: 1rem;    /* 16px */
  --font-size-lg: 1.125rem;  /* 18px */
  --font-size-xl: 1.25rem;   /* 20px */
  --font-size-2xl: 1.5rem;   /* 24px */
  --font-size-3xl: 1.875rem; /* 30px */
  --font-size-4xl: 2.25rem;  /* 36px */
  --font-size-5xl: 3rem;     /* 48px */
  --font-size-6xl: 3.75rem;  /* 60px */

  --font-weight-thin: 100;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  --font-weight-black: 900;

  --line-height-tight: 1.25;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  --line-height-loose: 2;

  /* 层级系统 */
  --z-index-dropdown: 1000;
  --z-index-sticky: 1020;
  --z-index-fixed: 1030;
  --z-index-modal-backdrop: 1040;
  --z-index-modal: 1050;
  --z-index-popover: 1060;
  --z-index-tooltip: 1070;
  --z-index-max: 2147483647;

  /* 过渡动画系统 */
  --transition-none: none;
  --transition-all: all 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: all 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 350ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slower: all 500ms cubic-bezier(0.4, 0, 0.2, 1);

  --ease-linear: linear;
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);

  /* 断点系统 */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}

/* ========================================
   全局样式重置
======================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

*::before,
*::after {
  box-sizing: border-box;
}

/* ========================================
   基础样式
======================================== */
html {
  font-size: 16px;
  line-height: 1.6;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-primary);
  background: linear-gradient(135deg, #f8fafc 0%, #e6f1ff 25%, #ffffff 50%, #e6f1ff 75%, #f8fafc 100%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
}

/* 文字选择样式 */
::selection {
  background: var(--primary-color);
  color: var(--text-white);
}

::-moz-selection {
  background: var(--primary-color);
  color: var(--text-white);
}

/* 自定义滚动条样式 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
  border-radius: var(--border-radius-sm);
}

::-webkit-scrollbar-thumb {
  background: var(--primary-gradient);
  border-radius: var(--border-radius-sm);
  transition: var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-gradient-hover);
  box-shadow: var(--shadow-colored);
}

::-webkit-scrollbar-corner {
  background: var(--bg-secondary);
}

/* Firefox滚动条样式 */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--primary-color) var(--bg-secondary);
}

/* ========================================
   排版样式
======================================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
}

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

a:hover,
a:focus {
  color: #1a5fb4;
  text-decoration: underline;
}

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

/* ========================================
   布局容器
======================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

/* ========================================
   加载动画
======================================== */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-overlay.hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-spinner {
  text-align: center;
}

.spinner-ring {
  width: 60px;
  height: 60px;
  border: 4px solid var(--border-color);
  border-top: 4px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto var(--spacing-md);
}

.loading-text {
  font-size: var(--font-size-lg);
  color: var(--primary-color);
  font-weight: 600;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* ========================================
   导航栏样式增强
======================================== */
.navbar {
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-index-fixed);
  transition: var(--transition-base);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.navbar.scrolled {
  background: rgba(0, 0, 0, 0.98);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  border-bottom-color: rgba(255, 255, 255, 0.2);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-6);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-xl);
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition-fast);
}

.nav-logo:hover {
  transform: scale(1.05);
}

.nav-logo img {
  height: 40px;
  width: auto;
  max-width: 60px;
  object-fit: contain;
  border-radius: var(--border-radius);
  transition: var(--transition-fast);
  background: rgba(255, 255, 255, 0.9);
  padding: 4px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.nav-logo:hover img {
  transform: rotate(5deg);
}

.logo-text {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-family: var(--font-family-heading);
}

.nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--spacing-2);
}

.nav-menu li {
  position: relative;
}

.nav-menu a {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-4);
  color: var(--text-primary);
  font-weight: var(--font-weight-medium);
  border-radius: var(--border-radius);
  transition: var(--transition-fast);
  position: relative;
  text-decoration: none;
  font-size: var(--font-size-sm);
}

.nav-menu a::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--primary-gradient);
  opacity: 0;
  border-radius: var(--border-radius);
  transition: var(--transition-fast);
  z-index: -1;
}

.nav-menu a:hover::before,
.nav-menu a[aria-current="page"]::before {
  opacity: 0.1;
}

.nav-menu a:hover,
.nav-menu a[aria-current="page"] {
  color: var(--primary-color);
  transform: translateY(-1px);
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--primary-gradient);
  transition: var(--transition-fast);
  transform: translateX(-50%);
  border-radius: var(--border-radius-sm);
}

.nav-menu a:hover::after,
.nav-menu a[aria-current="page"]::after {
  width: 80%;
}

/* 导航菜单图标 - 增强对比度版本 */
.nav-menu a i {
  font-size: var(--font-size-sm);
  transition: var(--transition-fast);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
  background: rgba(255, 255, 255, 0.1);
  padding: 4px;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.nav-menu a:hover i {
  transform: scale(1.1);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.4);
}

/* 移动端菜单切换按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  padding: var(--spacing-2);
  border-radius: var(--border-radius);
  transition: var(--transition-fast);
  background: transparent;
  border: none;
}

.nav-toggle:hover {
  background: var(--bg-secondary);
  transform: scale(1.05);
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  margin: 2px 0;
  transition: var(--transition-fast);
  border-radius: var(--border-radius-sm);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* 下拉菜单 */
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--bg-primary);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--spacing-3);
  min-width: 200px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: var(--transition-fast);
  border: 1px solid var(--border-color);
}

.nav-menu li:hover .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown a {
  padding: var(--spacing-2) var(--spacing-3);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-1);
}

.nav-dropdown a:last-child {
  margin-bottom: 0;
}

/* ========================================
   页面头部区域
======================================== */
.page-header {
  position: relative;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  overflow: hidden;
}

.header-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-overlay);
}

.header-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--text-white);
  max-width: 800px;
  padding: var(--spacing-xl) var(--spacing-md);
}

.page-title {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: white !important;
  text-shadow:
    0 2px 4px rgba(0, 0, 0, 0.5),
    0 4px 8px rgba(0, 0, 0, 0.3),
    0 0 16px rgba(0, 0, 0, 0.2);
}

.page-subtitle {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-lg);
  color: white !important;
  opacity: 0.9;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: white !important;
  opacity: 0.8;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

.breadcrumb a {
  color: white !important;
  text-decoration: none;
  transition: opacity 0.3s ease;
}

.breadcrumb a:hover {
  opacity: 1;
  text-decoration: underline;
}

.breadcrumb span {
  color: white !important;
}

/* ========================================
   英雄区域（首页轮播）
======================================== */
.hero-section {
  position: relative;
  height: 85vh;
  min-height: 600px;
  max-height: 800px;
  overflow: hidden;
  margin-top: 70px;
  isolation: isolate; /* 创建新的堆叠上下文 */
}

.hero-slider {
  position: relative;
  width: 100%;
  height: 100%;
}

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 1s ease-in-out;
  display: flex;
  align-items: center;
  justify-content: center;
}

.slide.active {
  opacity: 1;
}

.slide::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
  animation: fadeInUp 1s ease 0.5s both;
  color: #ffffff !important;
}

.hero-subtitle {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xl);
  opacity: 0.9;
  animation: fadeInUp 1s ease 0.7s both;
  color: #ffffff !important;
}

.cta-button {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-xl);
  background: var(--primary-gradient);
  color: var(--text-white);
  font-weight: 600;
  border-radius: 50px;
  text-decoration: none;
  transition: var(--transition-base);
  animation: fadeInUp 1s ease 0.9s both;
  box-shadow: 0 4px 15px rgba(46, 123, 255, 0.3);
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(46, 123, 255, 0.4);
  color: var(--text-white);
  text-decoration: none;
}

/* 轮播控制器 */
.slider-controls {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--spacing-sm);
  z-index: 3;
}

.control-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid var(--text-white);
  background: transparent;
  cursor: pointer;
  transition: var(--transition-fast);
}

.control-dot.active,
.control-dot:hover {
  background: var(--text-white);
}

.slider-arrows {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  z-index: 3;
}

.arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: var(--text-white);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition-fast);
  backdrop-filter: blur(10px);
}

.arrow:hover {
  background: rgba(255, 255, 255, 0.3);
}

.arrow-prev {
  left: 30px;
}

.arrow-next {
  right: 30px;
}

/* ========================================
   动态粒子动画效果 (Canvas)
======================================== */
.particle-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  /* 确保Canvas不影响其他元素 */
  will-change: contents;
  opacity: 0.8;
}

/* 确保hero内容层级正确 */
.slide-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: #ffffff !important;
  max-width: 800px;
  padding: 0 var(--spacing-md);
  /* 确保文字在粒子之上 */
  mix-blend-mode: normal;
}

/* ========================================
   内容区域通用样式
======================================== */
main {
  min-height: calc(100vh - 70px);
}

/* 统一所有首页标题字体大小 - 以"我们的成就"为基准 */
.section-title {
  text-align: center;
  font-size: 2.5rem; /* 统一字体大小 */
  font-weight: 700;
  margin-bottom: var(--spacing-xl);
  position: relative;
  color: var(--text-primary);
}

/* 确保首页所有标题使用统一样式 */
.achievements-title,
.news-section .section-title,
.services-section .section-title,
.quick-links .section-title {
  font-size: 2.5rem !important;
  font-weight: 700 !important;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: var(--primary-gradient);
  border-radius: 2px;
}

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

/* ========================================
   增强卡片样式
======================================== */
.card {
  background: var(--bg-primary);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: var(--transition-base);
  border: 1px solid var(--border-color);
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--primary-gradient);
  transform: scaleX(0);
  transition: var(--transition-base);
  transform-origin: left;
}

.card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-2xl);
  border-color: var(--primary-light);
}

.card:hover::before {
  transform: scaleX(1);
}

/* 卡片变体 */
.card-featured {
  background: var(--primary-gradient);
  color: var(--text-inverse);
  border: none;
}

.card-featured .card-header,
.card-featured .card-footer {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

.card-glass {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.card-minimal {
  background: transparent;
  border: none;
  box-shadow: none;
}

.card-minimal:hover {
  background: var(--bg-secondary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

/* 卡片内容区域 */
.card-header {
  padding: var(--spacing-6);
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
  position: relative;
}

.card-header h3,
.card-header h4 {
  margin: 0;
  color: var(--text-primary);
  font-weight: var(--font-weight-semibold);
}

.card-body {
  padding: var(--spacing-6);
  position: relative;
}

.card-footer {
  padding: var(--spacing-6);
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-4);
}

/* 卡片图片 */
.card-image {
  position: relative;
  overflow: hidden;
  background: var(--bg-secondary);
}

.card-image img {
  width: 100%;
  height: auto;
  transition: var(--transition-slow);
  display: block;
}

.card:hover .card-image img {
  transform: scale(1.1);
}

.card-image-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-overlay);
  opacity: 0;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-inverse);
}

.card:hover .card-image-overlay {
  opacity: 1;
}

.card-image-badge {
  position: absolute;
  top: var(--spacing-4);
  right: var(--spacing-4);
  background: var(--primary-color);
  color: var(--text-inverse);
  padding: var(--spacing-1) var(--spacing-3);
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

/* 卡片动作区域 */
.card-actions {
  display: flex;
  gap: var(--spacing-2);
  align-items: center;
}

.card-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--border-radius-full);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  transition: var(--transition-fast);
  text-decoration: none;
  border: none;
  cursor: pointer;
}

.card-action:hover {
  background: var(--primary-color);
  color: var(--text-inverse);
  transform: scale(1.1);
}

/* 卡片特殊效果 */
.card-hover-lift {
  transition: var(--transition-base);
}

.card-hover-lift:hover {
  transform: translateY(-12px);
  box-shadow: var(--shadow-colored-lg);
}

.card-tilt {
  transition: var(--transition-base);
  transform-style: preserve-3d;
}

.card-tilt:hover {
  transform: perspective(1000px) rotateX(5deg) rotateY(5deg) translateY(-8px);
}

/* 新闻卡片特殊样式 */
.news-card {
  overflow: hidden;
  border-radius: var(--border-radius-lg);
  background: var(--bg-primary);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-base);
}

.news-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.news-image {
  position: relative;
  height: 200px;
  overflow: hidden;
  background: var(--bg-secondary);
}

.news-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-slow);
}

.news-card:hover .news-image img {
  transform: scale(1.1);
}

.news-date {
  position: absolute;
  top: var(--spacing-4);
  left: var(--spacing-4);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-radius: var(--border-radius);
  padding: var(--spacing-2) var(--spacing-3);
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.news-date .day {
  display: block;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--primary-color);
  line-height: 1;
}

.news-date .month {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.news-content {
  padding: var(--spacing-6);
}

.news-title {
  margin: 0 0 var(--spacing-3) 0;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
}

.news-title a {
  color: var(--text-primary);
  text-decoration: none;
  transition: var(--transition-fast);
}

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

.news-excerpt {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-4);
  line-height: var(--line-height-relaxed);
  font-size: var(--font-size-sm);
}

.news-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

.news-meta span {
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
}

.news-meta i {
  font-size: var(--font-size-xs);
}

/* ========================================
   增强按钮样式
======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-6);
  border: none;
  border-radius: var(--border-radius);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
  text-align: center;
  cursor: pointer;
  transition: var(--transition-fast);
  text-decoration: none;
  line-height: var(--line-height-tight);
  position: relative;
  overflow: hidden;
  user-select: none;
  white-space: nowrap;
}

.btn:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(46, 123, 255, 0.2);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

/* 按钮尺寸 */
.btn-xs {
  padding: var(--spacing-1) var(--spacing-3);
  font-size: var(--font-size-xs);
  gap: var(--spacing-1);
}

.btn-sm {
  padding: var(--spacing-2) var(--spacing-4);
  font-size: var(--font-size-sm);
}

.btn-lg {
  padding: var(--spacing-4) var(--spacing-8);
  font-size: var(--font-size-lg);
  gap: var(--spacing-3);
}

.btn-xl {
  padding: var(--spacing-5) var(--spacing-10);
  font-size: var(--font-size-xl);
  gap: var(--spacing-3);
}

/* 主要按钮 */
.btn-primary {
  background: var(--primary-gradient);
  color: var(--text-inverse);
  box-shadow: var(--shadow-colored);
  border: none;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--primary-gradient-hover);
  opacity: 0;
  transition: var(--transition-fast);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-colored-lg);
  color: var(--text-inverse);
  text-decoration: none;
}

.btn-primary:hover::before {
  opacity: 1;
}

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

/* 次要按钮 */
.btn-secondary {
  background: var(--gray-500);
  color: var(--text-inverse);
  border: none;
}

.btn-secondary:hover {
  background: var(--gray-600);
  transform: translateY(-1px);
  color: var(--text-inverse);
  text-decoration: none;
}

/* 成功按钮 */
.btn-success {
  background: var(--success-color);
  color: var(--text-inverse);
  border: none;
}

.btn-success:hover {
  background: var(--success-light);
  transform: translateY(-1px);
  color: var(--text-inverse);
}

/* 警告按钮 */
.btn-warning {
  background: var(--warning-color);
  color: var(--text-primary);
  border: none;
}

.btn-warning:hover {
  background: var(--warning-light);
  transform: translateY(-1px);
  color: var(--text-primary);
}

/* 危险按钮 */
.btn-danger {
  background: var(--danger-color);
  color: var(--text-inverse);
  border: none;
}

.btn-danger:hover {
  background: var(--danger-light);
  transform: translateY(-1px);
  color: var(--text-inverse);
}

/* 轮廓按钮 */
.btn-outline {
  background: transparent;
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
}

.btn-outline:hover {
  background: var(--primary-color);
  color: var(--text-inverse);
  transform: translateY(-1px);
  text-decoration: none;
}

.btn-outline-secondary {
  background: transparent;
  border: 2px solid var(--gray-500);
  color: var(--gray-500);
}

.btn-outline-secondary:hover {
  background: var(--gray-500);
  color: var(--text-inverse);
}

/* 幽灵按钮 */
.btn-ghost {
  background: transparent;
  color: var(--primary-color);
  border: none;
}

.btn-ghost:hover {
  background: var(--primary-lightest);
  color: var(--primary-color);
  transform: translateY(-1px);
}

/* 按钮形状 */
.btn-rounded {
  border-radius: var(--border-radius-full);
}

.btn-square {
  border-radius: 0;
}

.btn-circle {
  border-radius: 50%;
  width: 3rem;
  height: 3rem;
  padding: 0;
}

/* 特殊效果按钮 */
.btn-gradient {
  background: var(--primary-gradient);
  color: var(--text-inverse);
  background-size: 200% 200%;
  animation: gradientShift 3s ease infinite;
}

.btn-glow {
  position: relative;
  overflow: visible;
}

.btn-glow::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: inherit;
  border-radius: inherit;
  filter: blur(8px);
  opacity: 0;
  transition: var(--transition-fast);
  z-index: -1;
}

.btn-glow:hover::after {
  opacity: 0.4;
}

/* 按钮加载状态 */
.btn-loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}

.btn-loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 1rem;
  height: 1rem;
  margin: -0.5rem 0 0 -0.5rem;
  border: 2px solid transparent;
  border-top: 2px solid currentColor;
  border-radius: 50%;
  animation: buttonSpin 1s linear infinite;
}

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

/* 按钮组 */
.btn-group {
  display: inline-flex;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.btn-group .btn {
  border-radius: 0;
  border-right: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-group .btn:first-child {
  border-top-left-radius: var(--border-radius);
  border-bottom-left-radius: var(--border-radius);
}

.btn-group .btn:last-child {
  border-top-right-radius: var(--border-radius);
  border-bottom-right-radius: var(--border-radius);
  border-right: none;
}

/* 悬浮操作按钮 */
.btn-float {
  position: fixed;
  bottom: var(--spacing-8);
  right: var(--spacing-8);
  width: 4rem;
  height: 4rem;
  border-radius: 50%;
  background: var(--primary-gradient);
  color: var(--text-inverse);
  border: none;
  box-shadow: var(--shadow-xl);
  z-index: var(--z-index-sticky);
  transition: var(--transition-base);
}

.btn-float:hover {
  transform: scale(1.1) translateY(-2px);
  box-shadow: var(--shadow-2xl);
}

/* 播放按钮 */
.btn-play {
  position: relative;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border: none;
  width: 4rem;
  height: 4rem;
  border-radius: 50%;
  color: var(--primary-color);
  font-size: var(--font-size-xl);
  transition: var(--transition-base);
}

.btn-play::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  border: 2px solid var(--primary-color);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  animation: playPulse 2s infinite;
}

.btn-play:hover {
  transform: scale(1.1);
  background: var(--primary-color);
  color: var(--text-inverse);
}

@keyframes playPulse {
  0% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
  }
  100% {
    transform: translate(-50%, -50%) scale(1.5);
    opacity: 0;
  }
}

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

.form-group label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
  color: var(--text-primary);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  transition: var(--transition-fast);
  background: var(--bg-primary);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(46, 123, 255, 0.1);
}

/* ========================================
   分页组件样式（统一修复圆点与数字重叠）
======================================== */
.pagination {
  margin-top: var(--spacing-lg);
}

.pagination-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  list-style: none; /* 移除默认项目符号，修复黑点 */
  padding: 0;
  margin: 0;
}

.pagination-list li {
  list-style: none; /* 保险去除li圆点 */
}

.pagination-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  height: 44px;
  padding: 0 var(--spacing-sm);
  line-height: 1;
  border-radius: var(--border-radius-full);
  color: var(--text-primary);
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  transition: var(--transition-fast);
}

.pagination-link:hover {
  transform: translateY(-1px);
  border-color: var(--primary-light);
  color: var(--primary-color);
}

.pagination-link.active {
  background: var(--primary-gradient);
  color: var(--text-inverse);
  border-color: transparent;
}

.pagination-link.disabled {
  opacity: 0.5;
  pointer-events: none;
}

.pagination-ellipsis {
  color: var(--text-muted);
  padding: 0 var(--spacing-1);
  user-select: none;
}

.pagination-link i {
  font-size: 0.9rem;
}

/* ========================================
   网格布局
======================================== */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* ========================================
   页脚样式
======================================== */
.footer {
  background: linear-gradient(135deg, #1e293b 0%, #334155 50%, #475569 100%);
  color: var(--text-white);
  padding: var(--spacing-xl) 0 var(--spacing-lg);
  margin-top: var(--spacing-xl);
  position: relative;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--primary-gradient);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
}

.footer-section h3,
.footer-section h4 {
  color: var(--text-white);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
}

.footer-section p {
  opacity: 0.8;
  line-height: 1.6;
  font-size: var(--font-size-sm);
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-sm);
}

.footer-section ul li a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: var(--transition-fast);
  font-size: var(--font-size-sm);
}

.footer-section ul li a:hover {
  color: var(--text-white);
}

.social-links {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(46, 123, 255, 0.4);
  border-radius: 50%;
  color: var(--text-white);
  transition: var(--transition-fast);
  border: 2px solid rgba(46, 123, 255, 0.6);
  box-shadow: 0 2px 8px rgba(46, 123, 255, 0.3);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.social-links a:hover {
  background: var(--primary-gradient);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(46, 123, 255, 0.4);
  border-color: rgba(46, 123, 255, 0.8);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.6);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-lg);
  text-align: center;
  opacity: 0.8;
  font-size: var(--font-size-xs);
}

.footer-bottom a {
  color: var(--text-white);
  text-decoration: none;
  font-size: var(--font-size-xs);
}

.footer-bottom a:hover {
  text-decoration: underline;
}

/* ========================================
   返回顶部按钮
======================================== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: var(--primary-gradient);
  color: var(--text-white);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-base);
  z-index: var(--z-index-fixed);
  box-shadow: var(--box-shadow);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-2px);
  box-shadow: var(--box-shadow-lg);
}

/* ========================================
   工具类
======================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--primary-color); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-white { color: var(--text-white); }

.bg-primary { background: var(--primary-color); }
.bg-secondary { background: var(--bg-secondary); }
.bg-dark { background: var(--bg-dark); }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.align-items-center { align-items: center; }
.justify-content-center { justify-content: center; }
.justify-content-between { justify-content: space-between; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

/* ========================================
   响应式标题字体大小统一
======================================== */
@media (max-width: 768px) {
  /* 移动端统一标题字体大小 */
  .section-title,
  .achievements-title,
  .news-section .section-title,
  .services-section .section-title,
  .quick-links .section-title {
    font-size: 2rem !important; /* 移动端稍小但保持一致 */
  }
}

@media (max-width: 480px) {
  /* 小屏幕设备标题字体大小 */
  .section-title,
  .achievements-title,
  .news-section .section-title,
  .services-section .section-title,
  .quick-links .section-title {
    font-size: 1.75rem !important; /* 小屏幕进一步缩小但保持一致 */
  }
}

/* ========================================
   基础保障样式（Fallback）——日历与模态框
   说明：当增强样式(ui-enhancements.css)未能加载或被局部覆盖时，
   本段提供最小可用的布局与可见性保障，避免功能性崩溃。
======================================== */

/* 日历基础网格（确保7列布局） */
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
}
.calendar-day-header {
  text-align: center;
  font-weight: 600;
}

/* 模态框基础显示（确保遮罩与居中弹出） */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  z-index: var(--z-index-modal);
}
.modal.open {
  opacity: 1;
  visibility: visible;
}
.modal .modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
}
.modal .modal-content {
  position: relative;
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.98);
  border-radius: 24px;
  transform: scale(0.9) translateY(20px);
  transition: all 0.3s ease;
}
.modal.open .modal-content {
  transform: scale(1) translateY(0);
}