/* ================================================
   AI行业SEO引流网站 - 全局样式表
   版本：V1.0
   创建日期：2026-04-22
   ================================================ */

/* ==================== CSS变量定义 ==================== */
:root {
  /* 主色调 */
  --primary-color: #0066FF;
  --primary-dark: #0052CC;
  --primary-light: #3385FF;

  /* 辅助色 */
  --secondary-color: #667EEA;
  --secondary-dark: #5A67D8;
  --accent-color: #F59E0B;

  /* 背景色 */
  --bg-color: #FFFFFF;
  --bg-gray: #F8FAFC;
  --bg-dark: #1A1A2E;

  /* 文字色 */
  --text-primary: #333333;
  --text-secondary: #666666;
  --text-light: #999999;
  --text-white: #FFFFFF;

  /* 边框色 */
  --border-color: #E5E7EB;
  --border-light: #F3F4F6;

  /* 状态色 */
  --success-color: #10B981;
  --warning-color: #F59E0B;
  --error-color: #EF4444;
  --info-color: #3B82F6;

  /* 阴影 */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);

  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* 过渡 */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;

  /* 间距 */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* 容器宽度 */
  --container-max: 1200px;
  --container-narrow: 800px;

  /* 字体 */
  --font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
}

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

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

body {
  font-family: var(--font-family);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-primary);
  background-color: var(--bg-color);
  min-height: 100vh;
}

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

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

ul, ol {
  list-style: none;
}

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

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

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* ==================== 容器 ==================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.container-narrow {
  max-width: var(--container-narrow);
}

/* ==================== 头部 ==================== */
.header {
  background: var(--bg-color);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-top {
  background: var(--bg-dark);
  color: var(--text-white);
  padding: var(--space-2) 0;
  font-size: 0.875rem;
}

.header-top .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-contact {
  display: flex;
  gap: var(--space-6);
}

.header-contact a {
  color: var(--text-white);
  opacity: 0.9;
}

.header-contact a:hover {
  opacity: 1;
}

.header-social {
  display: flex;
  gap: var(--space-4);
}

.header-social a {
  color: var(--text-white);
  opacity: 0.9;
}

.header-main {
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--border-light);
}

.header-main .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.logo img {
  height: 40px;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.logo-text span:first-child {
  font-size: 1.25rem;
  color: var(--primary-color);
}

.logo-text span:last-child {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* ==================== 导航 ==================== */
.nav {
  display: flex;
  align-items: center;
  flex: 1;
  justify-content: flex-end;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: var(--space-2) var(--space-3);
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.9375rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-link:hover,
.nav-item.active .nav-link {
  color: var(--primary-color);
  background: var(--bg-gray);
}

.nav-link i {
  font-size: 0.625rem;
  transition: transform var(--transition-fast);
}

.nav-item:hover .nav-link i {
  transform: rotate(180deg);
}

/* 下拉菜单 */
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background: var(--bg-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-fast);
  padding: var(--space-2);
  z-index: 100;
}

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

.dropdown-item {
  display: block;
  padding: var(--space-3) var(--space-4);
  color: var(--text-primary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.dropdown-item:hover {
  background: var(--bg-gray);
  color: var(--primary-color);
}

/* 移动端菜单按钮 */
.menu-toggle {
  display: none;
  width: 32px;
  height: 32px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-fast);
}

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

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

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

/* 搜索框 */
.header-search {
  display: flex;
  align-items: center;
  background: var(--bg-gray);
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-4);
  width: 240px;
}

.header-search input {
  flex: 1;
  border: none;
  background: none;
  outline: none;
  padding: var(--space-1);
}

.header-search button {
  color: var(--text-secondary);
}

/* 搜索结果下拉 */
.search-results {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  margin-top: var(--space-2);
  max-height: 400px;
  overflow-y: auto;
  z-index: 1000;
  border: 1px solid var(--border-color);
}

.search-result-item {
  display: block;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-light);
  transition: background var(--transition-fast);
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-item:hover {
  background: var(--bg-gray);
}

.search-result-item .result-title {
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.search-result-item .result-category {
  font-size: 0.75rem;
  color: var(--text-light);
}

.search-no-results {
  padding: var(--space-6);
  text-align: center;
  color: var(--text-secondary);
}

/* 咨询按钮 */
.btn-consult {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--text-white);
  font-weight: 600;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-fast);
}

.btn-consult:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: var(--text-white);
}

/* ==================== Hero轮播区 ==================== */
.hero {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  display: flex;
  align-items: center;
  background: var(--gradient-hero);
}

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

.hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  display: flex;
  align-items: center;
  opacity: 0;
  transition: opacity 0.8s ease;
}

.hero-slide.active {
  opacity: 1;
  z-index: 2;
}

.hero-slide-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
}

.hero-slide-bg::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, rgba(15, 23, 42, 0.95) 0%, rgba(30, 41, 59, 0.8) 50%, transparent 100%);
}

.hero-content {
  position: relative;
  z-index: 10;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  color: var(--text-white);
  max-width: 600px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  margin-bottom: var(--space-4);
  width: fit-content;
}

.hero-title {
  font-size: 2.75rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-4);
}

.hero-desc {
  font-size: 1.125rem;
  opacity: 0.9;
  margin-bottom: var(--space-6);
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: var(--space-4);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  background: var(--primary-color);
  color: var(--text-white);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: var(--text-white);
  transform: translateY(-2px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  background: rgba(255, 255, 255, 0.15);
  color: var(--text-white);
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.3);
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.25);
  color: var(--text-white);
}

/* 轮播指示器 */
.hero-indicators {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 20;
  margin: 0;
  padding: 0;
  list-style: none;
}

.hero-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  cursor: pointer;
  transition: all 0.3s;
  border: none;
}

.hero-indicator.active {
  background: white;
  width: 40px;
  border-radius: 6px;
}

/* ==================== 副导航 ==================== */
.sub-nav {
  background: var(--bg-gray);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--border-light);
}

.sub-nav-list {
  display: flex;
  justify-content: center;
  gap: var(--space-8);
}

.sub-nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-secondary);
  font-size: 0.9375rem;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.sub-nav-link:hover {
  color: var(--primary-color);
  background: var(--bg-color);
}

.sub-nav-link i {
  font-size: 1.125rem;
}

/* ==================== 数据统计区 ==================== */
.stats {
  padding: var(--space-12) 0;
  background: var(--bg-color);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.stat-item {
  text-align: center;
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  background: var(--bg-gray);
  transition: all var(--transition-fast);
}

.stat-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.stat-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: var(--radius-lg);
  color: var(--text-white);
  font-size: 1.5rem;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
  line-height: 1.2;
}

.stat-unit {
  font-size: 1rem;
  font-weight: 400;
}

.stat-label {
  color: var(--text-secondary);
  margin-top: var(--space-2);
}

/* ==================== 课程导航区 ==================== */
.courses {
  padding: var(--space-16) 0;
  background: linear-gradient(180deg, var(--bg-gray) 0%, var(--bg-color) 100%);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(0, 102, 255, 0.1);
  color: var(--primary-color);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  margin-bottom: var(--space-4);
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.section-desc {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.course-card {
  background: var(--bg-color);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.course-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal);
}

.course-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
}

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

.course-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(0, 102, 255, 0.1), rgba(102, 126, 234, 0.1));
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-6);
  font-size: 1.75rem;
  color: var(--primary-color);
}

.course-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-3);
}

.course-desc {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-bottom: var(--space-6);
  line-height: 1.7;
}

.course-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.course-tag {
  padding: var(--space-1) var(--space-3);
  background: var(--bg-gray);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.course-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--primary-color);
  font-weight: 500;
}

.course-link:hover {
  gap: var(--space-3);
}

/* ==================== 最新资讯区 ==================== */
.latest-news {
  padding: var(--space-16) 0;
}

.tabs {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.tab {
  padding: var(--space-3) var(--space-6);
  background: var(--bg-gray);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.tab:hover,
.tab.active {
  background: var(--primary-color);
  color: var(--text-white);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.news-card {
  background: var(--bg-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.news-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.news-image {
  height: 200px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  position: relative;
  overflow: hidden;
}

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

.news-category {
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  padding: var(--space-1) var(--space-3);
  background: var(--primary-color);
  color: var(--text-white);
  font-size: 0.75rem;
  border-radius: var(--radius-sm);
}

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

.news-meta {
  display: flex;
  gap: var(--space-4);
  font-size: 0.875rem;
  color: var(--text-light);
  margin-bottom: var(--space-3);
}

.news-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-3);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

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

.news-excerpt {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.more-link {
  display: flex;
  justify-content: center;
  margin-top: var(--space-8);
}

.btn-more {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

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

/* ==================== 薪资分析区 ==================== */
.salary {
  padding: var(--space-16) 0;
  background: var(--bg-dark);
  color: var(--text-white);
}

.salary .section-title {
  color: var(--text-white);
}

.salary .section-desc {
  color: rgba(255, 255, 255, 0.7);
}

.salary-table-wrapper {
  overflow-x: auto;
  margin-top: var(--space-8);
}

.salary-table {
  width: 100%;
  border-collapse: collapse;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.salary-table th,
.salary-table td {
  padding: var(--space-4) var(--space-6);
  text-align: left;
}

.salary-table th {
  background: rgba(255, 255, 255, 0.1);
  font-weight: 600;
  color: var(--text-white);
}

.salary-table td {
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.9);
}

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

.salary-table tr:hover td {
  background: rgba(255, 255, 255, 0.05);
}

.salary-high {
  color: var(--success-color);
  font-weight: 600;
}

.salary-trend {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--success-color);
}

.demand-stars {
  color: var(--accent-color);
}

/* ==================== 学员案例区 ==================== */
.cases {
  padding: var(--space-16) 0;
}

.cases-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.case-card {
  background: var(--bg-color);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-fast);
}

.case-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.case-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-light);
}

.case-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-white);
  font-size: 1.25rem;
  font-weight: 600;
}

.case-info h4 {
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.case-info p {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.case-transition {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  padding: var(--space-4);
  background: var(--bg-gray);
  border-radius: var(--radius-md);
}

.case-from,
.case-to {
  flex: 1;
  text-align: center;
}

.case-from p,
.case-to p {
  font-size: 0.75rem;
  color: var(--text-light);
  margin-bottom: var(--space-1);
}

.case-from span,
.case-to span {
  font-weight: 600;
  font-size: 0.875rem;
}

.case-to span {
  color: var(--primary-color);
}

.case-arrow {
  color: var(--primary-color);
  font-size: 1.25rem;
}

.case-salary {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.case-salary-change {
  color: var(--success-color);
  font-weight: 600;
}

.case-link {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* ==================== 工具导航区 ==================== */
.tools {
  padding: var(--space-16) 0;
  background: var(--bg-gray);
}

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

.tool-card {
  background: var(--bg-color);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
  transition: all var(--transition-fast);
  border: 2px solid transparent;
}

.tool-card:hover {
  border-color: var(--primary-color);
  transform: translateY(-5px);
}

.tool-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-gray);
  border-radius: var(--radius-lg);
  font-size: 2rem;
}

.tool-name {
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.tool-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ==================== CTA区域 ==================== */
.cta {
  padding: var(--space-16) 0;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--text-white);
  text-align: center;
}

.cta-title {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: var(--space-4);
}

.cta-desc {
  font-size: 1.125rem;
  opacity: 0.9;
  margin-bottom: var(--space-8);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
}

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

.cta .btn-primary:hover {
  background: var(--bg-gray);
}

.cta .btn-secondary {
  border-color: var(--text-white);
}

/* ==================== 底部 ==================== */
.footer {
  background: var(--bg-dark);
  color: var(--text-white);
  padding-top: var(--space-16);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-12);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-about .logo {
  color: var(--text-white);
  margin-bottom: var(--space-4);
}

.footer-about .logo span:first-child {
  color: var(--text-white);
}

.footer-about p {
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.8;
  margin-bottom: var(--space-6);
}

.footer-social {
  display: flex;
  gap: var(--space-4);
}

.footer-social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  color: var(--text-white);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: var(--primary-color);
  transform: translateY(-3px);
}

.footer-column h4 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-6);
  color: var(--text-white);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  transition: all var(--transition-fast);
}

.footer-links a:hover {
  color: var(--primary-light);
  padding-left: var(--space-2);
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  color: rgba(255, 255, 255, 0.7);
}

.footer-contact i {
  color: var(--primary-light);
  margin-top: var(--space-1);
}

.footer-bottom {
  padding: var(--space-6) 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.875rem;
}

.footer-bottom-links {
  display: flex;
  gap: var(--space-6);
}

.footer-bottom-links a {
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom-links a:hover {
  color: var(--text-white);
}

.friendly-links {
  background: rgba(255, 255, 255, 0.05);
  padding: var(--space-8) 0;
}

.friendly-links h4 {
  color: var(--text-white);
  font-size: 1rem;
  margin-bottom: var(--space-4);
}

.friendly-links-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.friendly-links-list a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.875rem;
  padding: var(--space-2) var(--space-4);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.friendly-links-list a:hover {
  background: var(--primary-color);
  color: var(--text-white);
}

/* ==================== 面包屑 ==================== */
.breadcrumb {
  padding: var(--space-4) 0;
  background: var(--bg-gray);
  border-bottom: 1px solid var(--border-light);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.875rem;
}

.breadcrumb-item {
  color: var(--text-secondary);
}

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

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

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

.breadcrumb-item.active {
  color: var(--text-primary);
  font-weight: 500;
}

/* ==================== 页面标题区 ==================== */
.page-header {
  padding: var(--space-12) 0;
  background: linear-gradient(135deg, var(--bg-dark) 0%, rgba(102, 126, 234, 0.8) 100%);
  color: var(--text-white);
  text-align: center;
}

.page-header h1 {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: var(--space-4);
}

.page-header p {
  font-size: 1.125rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
}

/* ==================== 内容布局 ==================== */
.content-wrapper {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--space-8);
  padding: var(--space-12) 0;
}

.main-content {
  min-width: 0;
}

.sidebar {
  position: sticky;
  top: 100px;
  align-self: start;
}

.sidebar-widget {
  background: var(--bg-color);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-6);
}

.sidebar-widget h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--primary-color);
}

.sidebar-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.sidebar-tag {
  display: inline-block;
  padding: var(--space-2) var(--space-3);
  background: var(--bg-gray);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

.sidebar-tag:hover {
  background: var(--primary-color);
  color: var(--text-white);
}

.sidebar-articles {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.sidebar-article {
  display: flex;
  gap: var(--space-3);
}

.sidebar-article-image {
  width: 80px;
  height: 60px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  flex-shrink: 0;
  overflow: hidden;
}

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

.sidebar-article-content h4 {
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.4;
  margin-bottom: var(--space-1);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.sidebar-article-content h4 a {
  color: var(--text-primary);
}

.sidebar-article-content h4 a:hover {
  color: var(--primary-color);
}

.sidebar-article-content span {
  font-size: 0.75rem;
  color: var(--text-light);
}

.sidebar-cta {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--text-white);
  text-align: center;
}

.sidebar-cta h3 {
  border-bottom-color: rgba(255, 255, 255, 0.3);
  color: var(--text-white);
}

.sidebar-cta p {
  font-size: 0.9375rem;
  opacity: 0.9;
  margin-bottom: var(--space-4);
}

.sidebar-cta .btn {
  width: 100%;
  background: var(--text-white);
  color: var(--primary-color);
  justify-content: center;
}

/* ==================== 文章列表 ==================== */
.article-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.article-card {
  display: flex;
  gap: var(--space-6);
  background: var(--bg-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
  min-height: 200px;
}

.article-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.article-card-img-link {
  flex-shrink: 0;
  width: 280px;
  height: 200px;
  overflow: hidden;
}

.article-card-image {
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  transition: transform var(--transition-normal);
}

.article-card:hover .article-card-image {
  transform: scale(1.05);
}

.article-card-content {
  flex: 1;
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
}

.article-card-meta {
  display: flex;
  gap: var(--space-4);
  font-size: 0.875rem;
  color: var(--text-light);
  margin-bottom: var(--space-3);
}

.article-card-category {
  color: var(--primary-color);
}

.article-card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-3);
  line-height: 1.4;
}

.article-card-title a {
  color: var(--text-primary);
}

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

.article-card-excerpt {
  color: var(--text-secondary);
  line-height: 1.8;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-light);
}

.article-card-tags {
  display: flex;
  gap: var(--space-2);
}

.article-card-tag {
  padding: var(--space-1) var(--space-2);
  background: var(--bg-gray);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.article-card-more {
  color: var(--primary-color);
  font-size: 0.875rem;
  font-weight: 500;
}

/* ==================== 文章内容页 ==================== */
.article-header {
  margin-bottom: var(--space-8);
}

.article-header h1 {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: var(--space-4);
}

.article-meta {
  display: flex;
  gap: var(--space-6);
  font-size: 0.875rem;
  color: var(--text-secondary);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--border-light);
}

.article-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.article-body {
  font-size: 1.0625rem;
  line-height: 1.9;
}

.article-body h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: var(--space-10) 0 var(--space-4);
  color: var(--text-primary);
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: var(--space-8) 0 var(--space-3);
  color: var(--text-primary);
}

.article-body p {
  margin-bottom: var(--space-4);
}

.article-body ul,
.article-body ol {
  margin: var(--space-4) 0 var(--space-6) var(--space-6);
}

.article-body li {
  margin-bottom: var(--space-2);
  list-style: disc;
}

.article-body ol li {
  list-style: decimal;
}

.article-body code {
  background: var(--bg-gray);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.875em;
  color: var(--primary-color);
}

.article-body pre {
  background: var(--bg-dark);
  color: var(--text-white);
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  margin: var(--space-6) 0;
}

.article-body pre code {
  background: none;
  padding: 0;
  color: inherit;
}

.article-body blockquote {
  border-left: 4px solid var(--primary-color);
  padding: var(--space-4) var(--space-6);
  background: var(--bg-gray);
  margin: var(--space-6) 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.article-body img {
  border-radius: var(--radius-lg);
  margin: var(--space-6) 0;
}

.article-footer {
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-light);
}

.article-tags {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
}

.article-tag {
  padding: var(--space-2) var(--space-4);
  background: var(--bg-gray);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.article-share {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.article-share span {
  color: var(--text-secondary);
}

/* 相关推荐 */
.related-articles {
  margin-top: var(--space-12);
}

.related-articles h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-6);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.related-card {
  background: var(--bg-gray);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-fast);
}

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

.related-card-image {
  height: 140px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.related-card-content {
  padding: var(--space-4);
}

.related-card-title {
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-card-title a {
  color: var(--text-primary);
}

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

/* ==================== 分页 ==================== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-12);
}

.pagination-item {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: var(--space-2) var(--space-3);
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-weight: 500;
  transition: all var(--transition-fast);
  cursor: pointer;
  user-select: none;
  text-decoration: none;
}

.pagination-item:hover,
.pagination-item.active {
  background: var(--primary-color);
  border-color: var(--primary-color);
  color: var(--text-white);
}

.pagination-item.disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

/* button元素重置，与a元素保持一致 */
button.pagination-item {
  border: 1px solid var(--border-color);
  background: var(--bg-color);
  font-family: inherit;
  font-size: inherit;
  outline: none;
}

button.pagination-item:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* 省略号不hover变色 */
.pagination-ellipsis {
  cursor: default;
  background: transparent !important;
  border-color: transparent !important;
  color: var(--text-secondary) !important;
}

/* 分页页码信息 */
.pagination-info {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  padding: 0 var(--space-2);
  white-space: nowrap;
}

/* ==================== 悬浮咨询按钮 ==================== */
.floating-contact {
  position: fixed;
  right: 20px;
  bottom: 100px;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  z-index: 999;
}

.floating-btn {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-color);
  color: var(--text-white);
  border-radius: 50%;
  box-shadow: var(--shadow-lg);
  font-size: 1.25rem;
  transition: all var(--transition-fast);
}

.floating-btn:hover {
  transform: scale(1.1);
  background: var(--primary-dark);
}

.floating-btn.wechat {
  background: #07C160;
}

.floating-btn.phone {
  background: var(--accent-color);
}

/* ==================== 模态框 ==================== */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
}

.modal.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--bg-color);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  max-width: 500px;
  width: 90%;
  transform: translateY(20px);
  transition: transform var(--transition-fast);
}

.modal.active .modal-content {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-6);
}

.modal-header h3 {
  font-size: 1.25rem;
  font-weight: 600;
}

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-gray);
  border-radius: 50%;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--error-color);
  color: var(--text-white);
}

.form-group {
  margin-bottom: var(--space-4);
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--space-2);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  outline: none;
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-submit {
  width: 100%;
  padding: var(--space-4);
  background: var(--primary-color);
  color: var(--text-white);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.form-submit:hover {
  background: var(--primary-dark);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
  .container {
    padding: 0 var(--space-6);
  }

  .header-main .container {
    flex-wrap: wrap;
  }

  .nav {
    order: 3;
    width: 100%;
    display: none;
    padding-top: var(--space-4);
  }

  .nav.active {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    width: 100%;
  }

  .nav-link {
    justify-content: space-between;
  }

  .nav-dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    padding-left: var(--space-4);
    display: none;
  }

  .nav-item.active .nav-dropdown {
    display: block;
  }

  .header-search {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .hero {
    height: 400px;
  }

  .hero-title {
    font-size: 2rem;
  }

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

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

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

  .cases-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
  }

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

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
  }

  .content-wrapper {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

  .article-card {
    flex-direction: column;
  }

  .article-card-img-link {
    width: 100%;
    height: 200px;
  }

  .article-card-image {
    width: 100%;
    height: 200px;
  }

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

@media (max-width: 768px) {
  :root {
    font-size: 14px;
  }

  .container {
    padding: 0 var(--space-4);
  }

  .header-top {
    display: none;
  }

  .hero {
    height: 350px;
  }

  .hero-content {
    padding: 0 var(--space-4);
  }

  .hero-title {
    font-size: 1.75rem;
  }

  .hero-desc {
    font-size: 1rem;
  }

  .hero-buttons {
    flex-direction: column;
    gap: var(--space-3);
  }

  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }

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

  .stat-item {
    padding: var(--space-4);
  }

  .stat-number {
    font-size: 1.75rem;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .courses-grid,
  .news-grid {
    grid-template-columns: 1fr;
  }

  .cases-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
  }

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

  .tabs {
    flex-wrap: wrap;
    gap: var(--space-2);
  }

  .tab {
    padding: var(--space-2) var(--space-4);
    font-size: 0.875rem;
  }

  .salary-table {
    font-size: 0.875rem;
  }

  .salary-table th,
  .salary-table td {
    padding: var(--space-3);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }

  .friendly-links-list {
    justify-content: center;
  }

  .article-header h1 {
    font-size: 1.5rem;
  }

  .article-meta {
    flex-wrap: wrap;
    gap: var(--space-3);
  }

  .related-grid {
    grid-template-columns: 1fr;
  }

  .article-card {
    flex-direction: column;
  }

  .article-card-img-link {
    width: 100%;
    height: 180px;
    flex-shrink: 0;
  }

  .article-card-image {
    width: 100%;
    height: 180px;
  }

  .article-card-content {
    padding: var(--space-4);
  }

  .article-card-title {
    font-size: 1.1rem;
  }

  .article-card-excerpt {
    -webkit-line-clamp: 2;
  }

  .floating-contact {
    right: 10px;
    bottom: 80px;
  }

  .floating-btn {
    width: 44px;
    height: 44px;
  }

  .pagination {
    gap: var(--space-1);
  }

  .pagination-item {
    min-width: 36px;
    height: 36px;
  }
}

@media (max-width: 480px) {
  .hero {
    height: 300px;
  }

  .hero-indicators {
    bottom: 20px;
  }

  .hero-indicator {
    width: 8px;
    height: 8px;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .tools-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
  }

  .tool-card {
    padding: var(--space-4);
  }

  .tool-icon {
    width: 48px;
    height: 48px;
    font-size: 1.5rem;
  }

  .cta-title {
    font-size: 1.5rem;
  }

  .cta-buttons {
    flex-direction: column;
  }

  .article-body h2 {
    font-size: 1.25rem;
  }

  .article-body h3 {
    font-size: 1.125rem;
  }
}

/* ==================== 动画 ==================== */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

.animate-fadeIn {
  animation: fadeIn 0.6s ease forwards;
}

.animate-pulse {
  animation: pulse 2s ease-in-out infinite;
}

/* 滚动显示动画 */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 加载状态 */
.loading {
  position: relative;
  pointer-events: none;
}

.loading::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ==================== 微信弹窗样式 ==================== */
.modal-wechat {
  max-width: 400px;
}

.wechat-content {
  padding: var(--space-6);
  text-align: center;
}

.wechat-qrcode {
  background: var(--bg-gray);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin-bottom: var(--space-6);
}

.wechat-qrcode img {
  width: 180px;
  height: 180px;
  border-radius: var(--radius-md);
}

.wechat-info {
  text-align: left;
}

.wechat-tip {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
  font-size: 0.9rem;
}

.wechat-tip i {
  margin-right: var(--space-2);
}

.wechat-id {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.wechat-id strong {
  color: var(--primary-color);
  font-weight: 600;
}

/* ==================== 资料领取弹窗样式 ==================== */
.modal-resource {
  max-width: 500px;
}

.resource-content {
  padding: var(--space-6);
}

.resource-list {
  margin-bottom: var(--space-6);
}

.resource-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--bg-gray);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-3);
  transition: all var(--transition-fast);
}

.resource-item:hover {
  background: var(--primary-color);
  color: white;
}

.resource-item i {
  font-size: 1.25rem;
  color: var(--primary-color);
}

.resource-item:hover i {
  color: white;
}

.resource-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.resource-form input {
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.resource-form input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.resource-note {
  margin-top: var(--space-4);
  font-size: 0.85rem;
  color: var(--text-light);
  text-align: center;
}

.resource-note i {
  margin-right: var(--space-2);
}

/* ==================== 社交媒体弹窗样式 ==================== */
.modal-social {
  max-width: 450px;
}

.social-content {
  padding: var(--space-6);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.social-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-6);
  background: var(--bg-gray);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--transition-normal);
}

.social-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.social-item i {
  font-size: 2.5rem;
  margin-bottom: var(--space-3);
}

.social-item.wechat-item i {
  color: #07C160;
}

.social-item:nth-child(2) i {
  color: #E6162D;
}

.social-item:nth-child(3) i {
  color: #00A1D6;
}

.social-item:nth-child(4) i {
  color: #0066FF;
}

.social-item span {
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.social-item small {
  font-size: 0.8rem;
  color: var(--text-light);
}

/* ==================== 搜索结果样式 ==================== */
.search-results {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  max-height: 500px;
  overflow-y: auto;
  z-index: 1000;
  display: none;
  margin-top: 8px;
  border: 1px solid #e8e8e8;
}

.search-results-header {
  padding: 12px 16px;
  background: #f8f9fa;
  border-bottom: 1px solid #eee;
  font-size: 13px;
  color: #666;
}

.results-count {
  font-weight: 500;
}

.search-results-list {
  padding: 8px 0;
}

.search-result-item {
  display: flex;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid #f0f0f0;
  text-decoration: none;
  color: var(--text-primary);
  transition: all 0.2s ease;
  gap: 12px;
}

.search-result-item:hover {
  background: #f8f9fa;
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-item:hover .result-arrow {
  opacity: 1;
  transform: translateX(0);
}

.result-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 16px;
  flex-shrink: 0;
}

.result-content {
  flex: 1;
  min-width: 0;
}

.result-title {
  font-weight: 600;
  font-size: 15px;
  color: #1a1a1a;
  margin-bottom: 4px;
  line-height: 1.4;
}

.result-title em {
  background: #fff3bf;
  color: #d4380d;
  font-style: normal;
  padding: 0 2px;
  border-radius: 2px;
}

.result-desc {
  font-size: 13px;
  color: #666;
  line-height: 1.5;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.result-desc em {
  background: #fff3bf;
  color: #d4380d;
  font-style: normal;
  padding: 0 2px;
  border-radius: 2px;
}

.result-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
}

.result-category {
  color: var(--primary-color);
  background: rgba(102, 126, 234, 0.1);
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 500;
}

.result-arrow {
  color: #ccc;
  opacity: 0;
  transform: translateX(-4px);
  transition: all 0.2s ease;
}

.search-results-footer {
  padding: 10px 16px;
  background: #fafafa;
  border-top: 1px solid #eee;
  font-size: 12px;
  color: #999;
  text-align: center;
}

.search-no-results {
  padding: 40px 20px;
  text-align: center;
  color: #666;
}

.no-results-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: #f5f5f5;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 24px;
  color: #ccc;
}

.search-no-results p {
  margin: 8px 0;
  font-size: 14px;
}

.search-no-results strong {
  color: #1a1a1a;
}

.no-results-tip {
  font-size: 13px !important;
  color: #999 !important;
}

.no-results-tip a {
  color: var(--primary-color);
  text-decoration: none;
}

.no-results-tip a:hover {
  text-decoration: underline;
}

/* ==================== 测评表单样式 ==================== */
.assessment-container {
  max-width: 600px;
  margin: 0 auto;
  padding: var(--space-8);
}

.assessment-header {
  text-align: center;
  margin-bottom: var(--space-8);
}

.assessment-header h1 {
  font-size: 2rem;
  margin-bottom: var(--space-4);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.progress-bar {
  height: 8px;
  background: var(--bg-gray);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: var(--space-4);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  border-radius: var(--radius-full);
  transition: width var(--transition-normal);
}

.progress-text {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.form-step {
  display: none;
}

.form-step.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

.form-step h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-6);
  text-align: center;
}

.form-options {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.form-option {
  display: flex;
  align-items: center;
  padding: var(--space-4);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.form-option:hover {
  border-color: var(--primary-light);
  background: rgba(0, 102, 255, 0.05);
}

.form-option input[type="radio"],
.form-option input[type="checkbox"] {
  margin-right: var(--space-4);
  width: 20px;
  height: 20px;
  accent-color: var(--primary-color);
}

.form-option.error {
  border-color: var(--error-color);
  background: rgba(239, 68, 68, 0.05);
}

.step-buttons {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.step-buttons .btn {
  flex: 1;
}

/* 测评结果样式 */
.assessment-result {
  display: none;
  padding: var(--space-8);
}

.result-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-lg);
  text-align: center;
}

.result-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-6);
}

.result-icon i {
  font-size: 2.5rem;
  color: white;
}

.result-title {
  font-size: 1.5rem;
  margin-bottom: var(--space-4);
}

.profile-tag {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  padding: var(--space-2) var(--space-6);
  border-radius: var(--radius-full);
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-6);
}

.result-recommendations {
  text-align: left;
  margin-top: var(--space-8);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-light);
}

.recommendation-item {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
}

.recommendation-item.primary {
  background: linear-gradient(135deg, rgba(0, 102, 255, 0.1), rgba(102, 126, 234, 0.1));
  border-left: 4px solid var(--primary-color);
}

.recommendation-item.secondary {
  background: var(--bg-gray);
  border-left: 4px solid var(--secondary-color);
}

.recommendation-item h4 {
  margin-bottom: var(--space-2);
}

.recommendation-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ==================== 面试题库页面样式 ==================== */
.question-section {
  margin-bottom: var(--space-8);
}

.question-category {
  font-size: 1.25rem;
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--primary-color);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.question-category i {
  color: var(--primary-color);
}

.question-card {
  background: white;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
  overflow: hidden;
}

.question-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: var(--space-5);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.question-header:hover {
  background: var(--bg-gray);
}

.question-number {
  background: var(--primary-color);
  color: white;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 600;
  margin-right: var(--space-4);
  flex-shrink: 0;
}

.question-text {
  flex: 1;
  font-weight: 500;
}

.question-toggle {
  color: var(--text-light);
  transition: transform var(--transition-fast);
}

.question-card.active .question-toggle {
  transform: rotate(180deg);
}

.question-answer {
  display: none;
  padding: 0 var(--space-5) var(--space-5);
  border-top: 1px solid var(--border-light);
}

.question-card.active .question-answer {
  display: block;
}

.answer-content {
  padding: var(--space-4);
  background: var(--bg-gray);
  border-radius: var(--radius-md);
  line-height: 1.8;
}

.answer-content p {
  margin-bottom: var(--space-3);
}

.answer-content code {
  background: var(--bg-dark);
  color: #E0E0E0;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.answer-content pre {
  background: var(--bg-dark);
  color: #E0E0E0;
  padding: var(--space-4);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: var(--space-4) 0;
}

.answer-content pre code {
  background: none;
  padding: 0;
}

/* ==================== 工具导航页面样式 ==================== */
.tool-section {
  margin-bottom: var(--space-12);
}

.tool-category-title {
  font-size: 1.5rem;
  margin-bottom: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.tool-category-title i {
  font-size: 2rem;
}

.tools-full-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-6);
}

.tool-full-card {
  background: white;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: all var(--transition-normal);
}

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

.tool-full-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.tool-full-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
}

.tool-full-name {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.tool-full-company {
  font-size: 0.85rem;
  color: var(--text-light);
}

.tool-full-desc {
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
  line-height: 1.6;
}

.tool-full-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.tool-full-tag {
  background: var(--bg-gray);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.tool-full-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--primary-color);
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.tool-full-link:hover {
  gap: var(--space-3);
}

/* ==================== 课程详情页样式 ==================== */
.course-hero {
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--primary-color) 100%);
  color: white;
  padding: var(--space-16) 0;
}

.course-hero-content {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--space-12);
  align-items: center;
}

.course-hero-tag {
  display: inline-block;
  background: rgba(255, 255, 255, 0.2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  margin-bottom: var(--space-4);
}

.course-hero-title {
  font-size: 2.5rem;
  margin-bottom: var(--space-4);
}

.course-hero-desc {
  font-size: 1.125rem;
  opacity: 0.9;
  line-height: 1.8;
  margin-bottom: var(--space-6);
}

.course-hero-stats {
  display: flex;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

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

.course-hero-stat-value {
  font-size: 2rem;
  font-weight: 700;
}

.course-hero-stat-label {
  font-size: 0.9rem;
  opacity: 0.8;
}

.course-hero-sidebar {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}

.course-sidebar-price {
  text-align: center;
  margin-bottom: var(--space-6);
}

.course-sidebar-price-label {
  font-size: 0.9rem;
  opacity: 0.8;
}

.course-sidebar-price-value {
  font-size: 2.5rem;
  font-weight: 700;
}

.course-sidebar-features {
  list-style: none;
  margin-bottom: var(--space-6);
}

.course-sidebar-features li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) 0;
}

.course-sidebar-features li i {
  color: var(--success-color);
}

/* 课程章节手风琴 */
.curriculum-item {
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-3);
  overflow: hidden;
}

.curriculum-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5);
  background: var(--bg-gray);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.curriculum-header:hover {
  background: var(--border-light);
}

.curriculum-item.active .curriculum-header {
  background: var(--primary-color);
  color: white;
}

.curriculum-item-number {
  background: var(--primary-color);
  color: white;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  margin-right: var(--space-4);
}

.curriculum-item.active .curriculum-item-number {
  background: white;
  color: var(--primary-color);
}

.curriculum-item-title {
  flex: 1;
  font-weight: 500;
}

.curriculum-item-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: 0.9rem;
  opacity: 0.8;
}

.curriculum-toggle {
  transition: transform var(--transition-fast);
}

.curriculum-item.active .curriculum-toggle {
  transform: rotate(180deg);
}

.curriculum-content {
  display: none;
  padding: var(--space-5);
  border-top: 1px solid var(--border-light);
}

.curriculum-item.active .curriculum-content {
  display: block;
}

.curriculum-topics {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.curriculum-topic {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.curriculum-topic i {
  color: var(--primary-color);
  margin-top: 4px;
}

/* ==================== 岗位详情页样式 ==================== */
.job-hero {
  background: linear-gradient(135deg, #1A1A2E 0%, #667EEA 100%);
  color: white;
  padding: var(--space-16) 0;
}

.job-hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.job-hero-title {
  font-size: 2.5rem;
  margin-bottom: var(--space-4);
}

.job-hero-desc {
  font-size: 1.125rem;
  opacity: 0.9;
  line-height: 1.8;
  margin-bottom: var(--space-8);
}

.job-hero-tags {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.job-tag {
  background: rgba(255, 255, 255, 0.2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
}

.job-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-8);
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.job-stat-item {
  text-align: center;
}

.job-stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.job-stat-label {
  font-size: 0.9rem;
  opacity: 0.8;
}

/* 岗位详情内容 */
.job-content-grid {
  display: grid;
  grid-template-columns: 1fr 350px;
  gap: var(--space-8);
}

.job-main-content h2 {
  font-size: 1.5rem;
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--primary-color);
}

.job-main-content h3 {
  font-size: 1.25rem;
  margin: var(--space-6) 0 var(--space-4);
}

.job-main-content ul {
  list-style: none;
  margin-bottom: var(--space-6);
}

.job-main-content li {
  padding: var(--space-3) 0;
  padding-left: var(--space-6);
  position: relative;
}

.job-main-content li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  background: var(--primary-color);
  border-radius: 50%;
}

/* 学员画像侧边栏 */
.student-profile {
  background: white;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  position: sticky;
  top: 100px;
}

.student-profile h3 {
  font-size: 1.125rem;
  margin-bottom: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.student-profile h3 i {
  color: var(--primary-color);
}

.profile-item {
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-light);
}

.profile-item:last-child {
  border-bottom: none;
}

.profile-label {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: var(--space-2);
}

.profile-value {
  font-weight: 500;
}

.profile-bullets {
  margin-top: var(--space-3);
}

.profile-bullets li {
  padding: var(--space-2) 0;
  padding-left: var(--space-4);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ==================== 响应式调整 ==================== */
@media (max-width: 1024px) {
  .course-hero-content {
    grid-template-columns: 1fr;
  }

  .course-hero-sidebar {
    max-width: 400px;
    margin: 0 auto;
  }

  .job-content-grid {
    grid-template-columns: 1fr;
  }

  .student-profile {
    position: static;
  }
}

@media (max-width: 768px) {
  .course-hero-title {
    font-size: 1.75rem;
  }

  .course-hero-stats {
    flex-wrap: wrap;
    gap: var(--space-4);
  }

  .job-hero-title {
    font-size: 1.75rem;
  }

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

  .social-content {
    grid-template-columns: 1fr;
  }

  .assessment-container {
    padding: var(--space-4);
  }
}

/* ==================== 学员故事详情页样式 ==================== */
.student-hero {
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--secondary-color) 100%);
  color: white;
  padding: var(--space-16) 0;
}

.student-hero-content {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-8);
  align-items: center;
}

.student-avatar-large {
  width: 150px;
  height: 150px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  font-weight: 700;
}

.student-info h1 {
  font-size: 2rem;
  margin-bottom: var(--space-3);
}

.student-info .student-subtitle {
  font-size: 1.125rem;
  opacity: 0.9;
  margin-bottom: var(--space-6);
}

.student-badges {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.student-badge {
  background: rgba(255, 255, 255, 0.2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.student-badge i {
  color: var(--accent-color);
}

/* 故事时间线 */
.timeline {
  position: relative;
  padding-left: var(--space-8);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-color);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-8);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-8) + 8px);
  top: 4px;
  width: 16px;
  height: 16px;
  background: var(--primary-color);
  border-radius: 50%;
  border: 3px solid white;
  box-shadow: var(--shadow-md);
}

.timeline-date {
  font-size: 0.85rem;
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.timeline-title {
  font-size: 1.25rem;
  margin-bottom: var(--space-3);
}

.timeline-content {
  background: var(--bg-gray);
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  line-height: 1.8;
}

.timeline-content p {
  margin-bottom: var(--space-3);
}

.timeline-content blockquote {
  border-left: 4px solid var(--primary-color);
  padding-left: var(--space-4);
  margin: var(--space-4) 0;
  font-style: italic;
  color: var(--text-secondary);
}

.salary-comparison {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-4);
  align-items: center;
  background: white;
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  margin: var(--space-6) 0;
  box-shadow: var(--shadow-md);
}

.salary-before, .salary-after {
  text-align: center;
}

.salary-label {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: var(--space-2);
}

.salary-value {
  font-size: 2rem;
  font-weight: 700;
}

.salary-after .salary-value {
  color: var(--success-color);
}

.salary-arrow {
  font-size: 2rem;
  color: var(--primary-color);
}

.offer-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-4);
  margin: var(--space-6) 0;
}

.offer-item {
  background: white;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  text-align: center;
  transition: all var(--transition-normal);
}

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

.offer-item.accepted {
  border-color: var(--success-color);
  background: rgba(16, 185, 129, 0.05);
}

.offer-company {
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.offer-position {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: var(--space-3);
}

.offer-salary {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--success-color);
}

.offer-item.accepted .offer-badge {
  display: inline-block;
  background: var(--success-color);
  color: white;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  margin-top: var(--space-2);
}

@media (max-width: 768px) {
  .student-hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .student-avatar-large {
    margin: 0 auto;
  }

  .student-badges {
    justify-content: center;
  }

  .salary-comparison {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  .salary-arrow {
    transform: rotate(90deg);
  }
}

/* ==================== AI学习路径详情页样式 ==================== */
.learning-path-hero {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: white;
  padding: var(--space-16) 0;
  text-align: center;
}

.learning-path-hero h1 {
  font-size: 2.5rem;
  margin-bottom: var(--space-4);
}

.learning-path-hero p {
  font-size: 1.125rem;
  opacity: 0.9;
  max-width: 700px;
  margin: 0 auto var(--space-8);
}

.path-steps {
  counter-reset: step;
}

.path-step {
  display: grid;
  grid-template-columns: 100px 1fr 300px;
  gap: var(--space-8);
  padding: var(--space-8) 0;
  border-bottom: 1px solid var(--border-light);
  align-items: start;
}

.path-step-number {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 700;
  color: white;
  position: relative;
}

.path-step-number::after {
  content: '';
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 20px;
  background: var(--border-color);
}

.path-step:last-child .path-step-number::after {
  display: none;
}

.path-step-content h3 {
  font-size: 1.5rem;
  margin-bottom: var(--space-4);
}

.path-step-content p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-4);
}

.path-step-topics {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.path-topic {
  background: var(--bg-gray);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.path-step-card {
  background: white;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
}

.path-step-card h4 {
  font-size: 1.125rem;
  margin-bottom: var(--space-4);
  color: var(--primary-color);
}

.path-step-card ul {
  list-style: none;
}

.path-step-card li {
  padding: var(--space-2) 0;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.path-step-card li i {
  color: var(--success-color);
}

@media (max-width: 1024px) {
  .path-step {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .path-step-number {
    width: 60px;
    height: 60px;
    font-size: 1.5rem;
  }
}

/* ==================== 额外样式 ==================== */
.more-link {
  text-align: center;
  margin-top: var(--space-8);
}

.tool-card {
  text-decoration: none;
  color: inherit;
}

/* ==================== 联系选项弹窗样式 ==================== */
.contact-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.contact-option {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-6) var(--space-4);
  background: var(--bg-gray);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--transition-normal);
}

.contact-option:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.contact-option i {
  font-size: 2.5rem;
  margin-bottom: var(--space-3);
  color: var(--primary-color);
}

.contact-option span {
  font-weight: 600;
  font-size: 0.95rem;
}

/* 微信选项 */
.contact-option[data-action="wechat"] i,
.contact-option.social-wechat i {
  color: #07C160;
}

.contact-option[data-action="wechat"]:hover,
.contact-option.social-wechat:hover {
  background: linear-gradient(135deg, rgba(7, 193, 96, 0.1), rgba(7, 193, 96, 0.05));
  border: 1px solid rgba(7, 193, 96, 0.3);
}

/* 电话选项 */
.contact-option[href^="tel"] i {
  color: var(--accent-color);
}

.contact-option[href^="tel"]:hover {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(245, 158, 11, 0.05));
  border: 1px solid rgba(245, 158, 11, 0.3);
}

/* 微博选项 */
.contact-option[data-action="weibo"] i,
.contact-option.social-weibo i {
  color: #E6162D;
}

.contact-option[data-action="weibo"]:hover,
.contact-option.social-weibo:hover {
  background: linear-gradient(135deg, rgba(230, 22, 45, 0.1), rgba(230, 22, 45, 0.05));
  border: 1px solid rgba(230, 22, 45, 0.3);
}

/* B站选项 */
.contact-option[data-action="bilibili"] i,
.contact-option.social-bilibili i {
  color: #FB7299;
}

.contact-option[data-action="bilibili"]:hover,
.contact-option.social-bilibili:hover {
  background: linear-gradient(135deg, rgba(251, 114, 153, 0.1), rgba(251, 114, 153, 0.05));
  border: 1px solid rgba(251, 114, 153, 0.3);
}

/* 小号弹窗样式 */
.modal-small {
  max-width: 400px;
}

.modal-small .modal-content {
  padding: var(--space-6);
}

.social-link-content {
  text-align: center;
  padding: var(--space-6) 0;
}

.social-link-content i {
  margin-bottom: var(--space-4);
}

.social-link-content p {
  font-size: 1.1rem;
  font-weight: 500;
  margin-top: var(--space-3);
}

.social-link-content small {
  color: var(--text-light);
  font-size: 0.9rem;
}

/* 联系方式弹窗内边距调整 */
.modal-content .contact-options {
  margin-top: var(--space-6);
}

/* ==================== 顶级课程详情页增强样式 V2.0 ==================== */

/* 动态背景粒子效果 */
.course-hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: 0;
}

.course-particle {
  position: absolute;
  width: 6px;
  height: 6px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  animation: float-particle 15s infinite ease-in-out;
}

.course-particle:nth-child(1) { left: 10%; animation-delay: 0s; }
.course-particle:nth-child(2) { left: 20%; animation-delay: 2s; }
.course-particle:nth-child(3) { left: 30%; animation-delay: 4s; }
.course-particle:nth-child(4) { left: 40%; animation-delay: 1s; }
.course-particle:nth-child(5) { left: 50%; animation-delay: 3s; }
.course-particle:nth-child(6) { left: 60%; animation-delay: 5s; }
.course-particle:nth-child(7) { left: 70%; animation-delay: 2.5s; }
.course-particle:nth-child(8) { left: 80%; animation-delay: 1.5s; }
.course-particle:nth-child(9) { left: 90%; animation-delay: 4.5s; }
.course-particle:nth-child(10) { left: 15%; animation-delay: 3.5s; }

@keyframes float-particle {
  0%, 100% {
    transform: translateY(100vh) scale(0);
    opacity: 0;
  }
  10% {
    opacity: 1;
    transform: translateY(90vh) scale(1);
  }
  90% {
    opacity: 1;
    transform: translateY(10vh) scale(1);
  }
  100% {
    transform: translateY(0) scale(0);
    opacity: 0;
  }
}

/* 渐变网格背景 */
.course-grid-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  z-index: 0;
}

/* 增强版Hero区域 */
.course-hero-v2 {
  position: relative;
  padding: 100px 0 80px;
  overflow: hidden;
}

.course-hero-v2 .container {
  position: relative;
  z-index: 10;
}

.course-hero-badge-row {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.course-badge-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50px;
  font-size: 0.875rem;
  color: white;
  animation: badge-slide-in 0.6s ease forwards;
  opacity: 0;
}

.course-badge-item:nth-child(1) { animation-delay: 0.1s; }
.course-badge-item:nth-child(2) { animation-delay: 0.2s; }
.course-badge-item:nth-child(3) { animation-delay: 0.3s; }

@keyframes badge-slide-in {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.course-badge-hot {
  background: linear-gradient(135deg, #EF4444, #F97316);
  border-color: #EF4444;
}

.course-badge-new {
  background: linear-gradient(135deg, #10B981, #059669);
  border-color: #10B981;
}

.course-hero-v2 h1 {
  font-size: 3.5rem;
  font-weight: 800;
  color: white;
  margin-bottom: 20px;
  line-height: 1.2;
  animation: title-reveal 0.8s ease forwards;
  animation-delay: 0.2s;
  opacity: 0;
  background: linear-gradient(135deg, #ffffff 0%, #e0e7ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.course-hero-v2 .course-subtitle {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 40px;
  max-width: 700px;
  line-height: 1.8;
  animation: subtitle-fade 0.8s ease forwards;
  animation-delay: 0.4s;
  opacity: 0;
}

@keyframes subtitle-fade {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 0.9;
    transform: translateY(0);
  }
}

/* 数据统计卡片 */
.course-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.course-stat-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 16px;
  padding: 24px;
  text-align: center;
  transition: all 0.3s ease;
  animation: stat-card-in 0.6s ease forwards;
  opacity: 0;
}

.course-stat-card:nth-child(1) { animation-delay: 0.3s; }
.course-stat-card:nth-child(2) { animation-delay: 0.4s; }
.course-stat-card:nth-child(3) { animation-delay: 0.5s; }
.course-stat-card:nth-child(4) { animation-delay: 0.6s; }

@keyframes stat-card-in {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.course-stat-card:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.course-stat-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.1));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.course-stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: white;
  line-height: 1;
  margin-bottom: 8px;
}

.course-stat-number .unit {
  font-size: 1rem;
  font-weight: 500;
  opacity: 0.8;
}

.course-stat-label {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
}

/* CTA按钮组 */
.course-cta-row {
  display: flex;
  gap: 16px;
  animation: cta-in 0.6s ease forwards;
  animation-delay: 0.7s;
  opacity: 0;
}

@keyframes cta-in {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.btn-hero-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 32px;
  background: linear-gradient(135deg, #ffffff 0%, #e0e7ff 100%);
  color: var(--primary-color);
  font-weight: 700;
  font-size: 1rem;
  border-radius: 50px;
  text-decoration: none;
  transition: all 0.3s ease;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.btn-hero-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
  color: var(--primary-dark);
}

.btn-hero-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 32px;
  background: transparent;
  color: white;
  font-weight: 600;
  font-size: 1rem;
  border-radius: 50px;
  border: 2px solid rgba(255, 255, 255, 0.5);
  text-decoration: none;
  transition: all 0.3s ease;
}

.btn-hero-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: white;
  transform: translateY(-3px);
}

/* 右侧悬浮卡片 */
.course-hero-card {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 320px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-radius: 24px;
  padding: 32px;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
  animation: card-float 3s ease-in-out infinite;
  z-index: 20;
}

@keyframes card-float {
  0%, 100% {
    transform: translateY(-50%) translateX(0);
  }
  50% {
    transform: translateY(calc(-50% - 10px)) translateX(0);
  }
}

.course-card-price {
  text-align: center;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px dashed #e5e7eb;
}

.course-card-price-label {
  font-size: 0.875rem;
  color: #6b7280;
  margin-bottom: 8px;
}

.course-card-price-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary-color);
}

.course-card-price-value .original {
  font-size: 1rem;
  color: #9ca3af;
  text-decoration: line-through;
  margin-left: 8px;
}

.course-card-features {
  list-style: none;
}

.course-card-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  color: #374151;
  font-size: 0.9375rem;
}

.course-card-features li i {
  color: #10B981;
  font-size: 1rem;
}

.course-card-cta {
  display: block;
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  font-weight: 600;
  text-align: center;
  border-radius: 12px;
  text-decoration: none;
  margin-top: 20px;
  transition: all 0.3s ease;
}

.course-card-cta:hover {
  transform: scale(1.02);
  box-shadow: 0 10px 30px rgba(0, 102, 255, 0.3);
  color: white;
}

/* ==================== 薪资对比雷达图区域 ==================== */
.salary-section {
  padding: 100px 0;
  background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

.salary-header {
  text-align: center;
  margin-bottom: 60px;
}

.salary-header h2 {
  font-size: 2.5rem;
  font-weight: 700;
  color: #1f2937;
  margin-bottom: 16px;
}

.salary-header p {
  font-size: 1.125rem;
  color: #6b7280;
  max-width: 600px;
  margin: 0 auto;
}

.salary-comparison-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.salary-card {
  background: white;
  border-radius: 20px;
  padding: 32px 24px;
  text-align: center;
  border: 1px solid #e5e7eb;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.salary-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.salary-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.1);
  border-color: var(--primary-color);
}

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

.salary-card.featured {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  border: none;
  transform: scale(1.05);
}

.salary-card.featured::before {
  display: none;
}

.salary-card.featured:hover {
  transform: scale(1.08);
}

.salary-card-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(239, 68, 68, 0.1);
  color: #EF4444;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 50px;
  margin-bottom: 16px;
}

.salary-card.featured .salary-card-tag {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}

.salary-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.salary-card-range {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 4px;
}

.salary-card.featured .salary-card-range {
  color: white;
}

.salary-card-unit {
  font-size: 0.875rem;
  opacity: 0.8;
  margin-bottom: 20px;
}

.salary-card-list {
  list-style: none;
  text-align: left;
}

.salary-card-list li {
  padding: 8px 0;
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.salary-card.featured .salary-card-list li {
  border-bottom-color: rgba(255, 255, 255, 0.1);
}

.salary-card-list li:last-child {
  border-bottom: none;
}

.salary-card-list li i {
  color: #10B981;
  font-size: 0.75rem;
}

/* ==================== 课程大纲增强版 ==================== */
.curriculum-section {
  padding: 100px 0;
  background: #ffffff;
}

.curriculum-section .section-header {
  text-align: center;
  margin-bottom: 60px;
}

.curriculum-section .section-header h2 {
  font-size: 2.5rem;
  font-weight: 700;
  color: #1f2937;
  margin-bottom: 16px;
}

.curriculum-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.curriculum-tab {
  padding: 12px 24px;
  background: #f3f4f6;
  border: none;
  border-radius: 50px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: #6b7280;
  cursor: pointer;
  transition: all 0.3s ease;
}

.curriculum-tab:hover {
  background: #e5e7eb;
}

.curriculum-tab.active {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
}

.curriculum-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.curriculum-card {
  background: white;
  border: 1px solid #e5e7eb;
  border-radius: 20px;
  padding: 28px;
  transition: all 0.3s ease;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.curriculum-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 0;
}

.curriculum-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  border-color: var(--primary-color);
}

.curriculum-card:hover::after {
  opacity: 0.03;
}

.curriculum-card > * {
  position: relative;
  z-index: 1;
}

.curriculum-card-header {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
}

.curriculum-card-num {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
  flex-shrink: 0;
}

.curriculum-card-info h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 4px;
}

.curriculum-card-info span {
  font-size: 0.8125rem;
  color: #9ca3af;
}

.curriculum-card-topics {
  margin-bottom: 16px;
}

.curriculum-card-topics li {
  padding: 8px 0;
  font-size: 0.875rem;
  color: #4b5563;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid #f3f4f6;
}

.curriculum-card-topics li:last-child {
  border-bottom: none;
}

.curriculum-card-topics li i {
  color: var(--primary-color);
  font-size: 0.625rem;
}

.curriculum-card-project {
  padding: 12px 16px;
  background: linear-gradient(135deg, rgba(0, 102, 255, 0.05), rgba(102, 126, 234, 0.05));
  border-radius: 10px;
  border-left: 3px solid var(--primary-color);
}

.curriculum-card-project span {
  font-size: 0.8125rem;
  color: var(--primary-color);
  font-weight: 500;
}

/* ==================== 学员案例墙 ==================== */
.students-section {
  padding: 100px 0;
  background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

.students-header {
  text-align: center;
  margin-bottom: 60px;
}

.students-header h2 {
  font-size: 2.5rem;
  font-weight: 700;
  color: #1f2937;
  margin-bottom: 16px;
}

.students-header p {
  font-size: 1.125rem;
  color: #6b7280;
}

.students-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.student-card {
  background: white;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
}

.student-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.1);
}

.student-card-header {
  padding: 32px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  text-align: center;
}

.student-avatar {
  width: 100px;
  height: 100px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  font-weight: 700;
  border: 4px solid rgba(255, 255, 255, 0.3);
}

.student-name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.student-role {
  font-size: 0.875rem;
  opacity: 0.9;
}

.student-card-body {
  padding: 28px;
}

.student-transition {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px;
  background: #f9fafb;
  border-radius: 12px;
  margin-bottom: 20px;
}

.student-from, .student-to {
  text-align: center;
}

.student-from p, .student-to p {
  font-size: 0.75rem;
  color: #9ca3af;
  margin-bottom: 4px;
}

.student-from span {
  font-weight: 600;
  color: #6b7280;
}

.student-to span {
  font-weight: 700;
  color: var(--primary-color);
}

.student-arrow {
  color: var(--primary-color);
  font-size: 1.5rem;
}

.student-salary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
  border-top: 1px solid #e5e7eb;
}

.student-salary-label {
  font-size: 0.875rem;
  color: #6b7280;
}

.student-salary-value {
  font-size: 1.25rem;
  font-weight: 700;
  color: #10B981;
}

.student-quote {
  font-size: 0.9375rem;
  color: #4b5563;
  font-style: italic;
  line-height: 1.7;
  padding: 16px;
  background: #f9fafb;
  border-radius: 10px;
  position: relative;
}

.student-quote::before {
  content: '"';
  font-size: 3rem;
  color: var(--primary-color);
  opacity: 0.2;
  position: absolute;
  top: 0;
  left: 12px;
}

/* ==================== 项目实战增强 ==================== */
.projects-section {
  padding: 100px 0;
  background: #ffffff;
}

.projects-header {
  text-align: center;
  margin-bottom: 60px;
}

.projects-header h2 {
  font-size: 2.5rem;
  font-weight: 700;
  color: #1f2937;
  margin-bottom: 16px;
}

.projects-header p {
  font-size: 1.125rem;
  color: #6b7280;
  max-width: 600px;
  margin: 0 auto;
}

.projects-grid-v2 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.project-card-v2 {
  background: white;
  border-radius: 20px;
  padding: 32px;
  border: 1px solid #e5e7eb;
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
}

.project-card-v2::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.project-card-v2:hover {
  transform: translateY(-8px);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.12);
  border-color: transparent;
}

.project-card-v2:hover::before {
  transform: scaleX(1);
}

.project-icon-large {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, rgba(0, 102, 255, 0.1), rgba(102, 126, 234, 0.1));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 20px;
}

.project-card-v2 h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #1f2937;
  margin-bottom: 12px;
}

.project-card-v2 p {
  font-size: 0.9375rem;
  color: #6b7280;
  line-height: 1.7;
  margin-bottom: 20px;
}

.project-tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.project-tech-tag {
  padding: 6px 12px;
  background: #f3f4f6;
  border-radius: 6px;
  font-size: 0.75rem;
  color: #6b7280;
  font-weight: 500;
}

/* ==================== 服务保障增强 ==================== */
.guarantee-section {
  padding: 100px 0;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
}

.guarantee-header {
  text-align: center;
  margin-bottom: 60px;
}

.guarantee-header h2 {
  font-size: 2.5rem;
  font-weight: 700;
  color: white;
  margin-bottom: 16px;
}

.guarantee-header p {
  font-size: 1.125rem;
  opacity: 0.9;
}

.guarantee-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.guarantee-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 20px;
  padding: 36px;
  text-align: center;
  transition: all 0.3s ease;
}

.guarantee-card:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-5px);
}

.guarantee-icon {
  width: 80px;
  height: 80px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  margin: 0 auto 24px;
}

.guarantee-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.guarantee-card p {
  font-size: 0.9375rem;
  opacity: 0.9;
  line-height: 1.7;
}

/* ==================== FAQ手风琴 ==================== */
.faq-section {
  padding: 100px 0;
  background: #f8fafc;
}

.faq-header {
  text-align: center;
  margin-bottom: 60px;
}

.faq-header h2 {
  font-size: 2.5rem;
  font-weight: 700;
  color: #1f2937;
  margin-bottom: 16px;
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: white;
  border-radius: 16px;
  margin-bottom: 16px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 28px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.faq-question:hover {
  background: #f9fafb;
}

.faq-question h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  color: #1f2937;
  display: flex;
  align-items: center;
  gap: 12px;
}

.faq-question h3 span {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  flex-shrink: 0;
}

.faq-toggle {
  width: 32px;
  height: 32px;
  background: #f3f4f6;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  flex-shrink: 0;
}

.faq-item.active .faq-toggle {
  background: var(--primary-color);
  color: white;
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

.faq-answer-content {
  padding: 0 28px 24px;
  color: #6b7280;
  line-height: 1.8;
}

/* ==================== 对比表格增强 ==================== */
.compare-section {
  padding: 100px 0;
  background: #ffffff;
}

.compare-header {
  text-align: center;
  margin-bottom: 60px;
}

.compare-header h2 {
  font-size: 2.5rem;
  font-weight: 700;
  color: #1f2937;
  margin-bottom: 16px;
}

.compare-table-wrapper {
  max-width: 900px;
  margin: 0 auto;
  overflow-x: auto;
}

.compare-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: white;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

.compare-table thead {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
}

.compare-table th {
  padding: 20px 24px;
  text-align: left;
  font-weight: 600;
  font-size: 0.9375rem;
}

.compare-table th:first-child {
  border-radius: 16px 0 0 0;
}

.compare-table th:last-child {
  border-radius: 0 16px 0 0;
}

.compare-table td {
  padding: 16px 24px;
  border-bottom: 1px solid #f3f4f6;
  font-size: 0.9375rem;
  color: #4b5563;
}

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

.compare-table tr:hover td {
  background: #f9fafb;
}

.compare-table td:first-child {
  font-weight: 600;
  color: #1f2937;
}

.compare-highlight {
  background: linear-gradient(135deg, rgba(0, 102, 255, 0.05), rgba(102, 126, 234, 0.05)) !important;
  font-weight: 600;
  color: var(--primary-color) !important;
}

.compare-check {
  color: #10B981;
  font-size: 1.125rem;
}

.compare-cross {
  color: #ef4444;
  font-size: 1.125rem;
}

/* ==================== 滚动动画 ==================== */
.reveal-up {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-scale.visible {
  opacity: 1;
  transform: scale(1);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* 数字递增动画 */
.count-up {
  display: inline-block;
}

/* ==================== 响应式调整 ==================== */
@media (max-width: 1200px) {
  .course-hero-card {
    display: none;
  }
  
  .salary-comparison-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .curriculum-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .students-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .projects-grid-v2 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .guarantee-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .course-hero-v2 {
    padding: 60px 0 40px;
  }
  
  .course-hero-v2 h1 {
    font-size: 2rem;
  }
  
  .course-hero-v2 .course-subtitle {
    font-size: 1rem;
  }
  
  .course-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .course-stat-card {
    padding: 16px;
  }
  
  .course-stat-number {
    font-size: 1.75rem;
  }
  
  .course-cta-row {
    flex-direction: column;
  }
  
  .btn-hero-primary,
  .btn-hero-secondary {
    width: 100%;
    justify-content: center;
  }
  
  .salary-comparison-grid {
    grid-template-columns: 1fr;
  }
  
  .salary-card.featured {
    transform: none;
  }
  
  .curriculum-grid {
    grid-template-columns: 1fr;
  }
  
  .students-grid {
    grid-template-columns: 1fr;
  }
  
  .projects-grid-v2 {
    grid-template-columns: 1fr;
  }
  
  .guarantee-grid {
    grid-template-columns: 1fr;
  }
  
  .salary-header h2,
  .curriculum-section .section-header h2,
  .students-header h2,
  .projects-header h2,
  .guarantee-header h2,
  .faq-header h2,
  .compare-header h2 {
    font-size: 1.75rem;
  }
}

.contact-option {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-6) var(--space-4);
  background: var(--bg-gray);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--transition-normal);
}

.contact-option:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.contact-option i {
  font-size: 2.5rem;
  margin-bottom: var(--space-3);
  color: var(--primary-color);
}

.contact-option span {
  font-weight: 600;
  font-size: 0.95rem;
}

/* 微信选项 */
.contact-option[data-action="wechat"] i,
.contact-option.social-wechat i {
  color: #07C160;
}

.contact-option[data-action="wechat"]:hover,
.contact-option.social-wechat:hover {
  background: linear-gradient(135deg, rgba(7, 193, 96, 0.1), rgba(7, 193, 96, 0.05));
  border: 1px solid rgba(7, 193, 96, 0.3);
}

/* 电话选项 */
.contact-option[href^="tel"] i {
  color: var(--accent-color);
}

.contact-option[href^="tel"]:hover {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(245, 158, 11, 0.05));
  border: 1px solid rgba(245, 158, 11, 0.3);
}

/* 微博选项 */
.contact-option[data-action="weibo"] i,
.contact-option.social-weibo i {
  color: #E6162D;
}

.contact-option[data-action="weibo"]:hover,
.contact-option.social-weibo:hover {
  background: linear-gradient(135deg, rgba(230, 22, 45, 0.1), rgba(230, 22, 45, 0.05));
  border: 1px solid rgba(230, 22, 45, 0.3);
}

/* B站选项 */
.contact-option[data-action="bilibili"] i,
.contact-option.social-bilibili i {
  color: #FB7299;
}

.contact-option[data-action="bilibili"]:hover,
.contact-option.social-bilibili:hover {
  background: linear-gradient(135deg, rgba(251, 114, 153, 0.1), rgba(251, 114, 153, 0.05));
  border: 1px solid rgba(251, 114, 153, 0.3);
}

/* 小号弹窗样式 */
.modal-small {
  max-width: 400px;
}

.modal-small .modal-content {
  padding: var(--space-6);
}

.social-link-content {
  text-align: center;
  padding: var(--space-6) 0;
}

.social-link-content i {
  margin-bottom: var(--space-4);
}

.social-link-content p {
  font-size: 1.1rem;
  font-weight: 500;
  margin-top: var(--space-3);
}

.social-link-content small {
  color: var(--text-light);
  font-size: 0.9rem;
}

/* 联系方式弹窗内边距调整 */
.modal-content .contact-options {
  margin-top: var(--space-6);
}

/* 学员详情页样式 */
.story-article {
  padding: 40px 0;
  background: #f8fafc;
}

.story-layout {
  display: grid;
  gap: 30px;
}

.story-main {
  background: white;
  border-radius: 16px;
  padding: 40px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.story-header {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #312e81 100%);
  margin: -40px -40px 40px -40px;
  padding: 60px 40px 40px;
  border-radius: 16px 16px 0 0;
  position: relative;
  overflow: hidden;
}

.story-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('https://images.unsplash.com/photo-1522202176988-66273c2fd55f?w=1200&h=600&fit=crop');
  background-size: cover;
  background-position: center;
  opacity: 0.3;
}

.story-category {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.15);
  color: white;
  padding: 8px 16px;
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 20px;
  position: relative;
  backdrop-filter: blur(10px);
}

.story-header h1 {
  font-size: 2.25rem;
  font-weight: 700;
  color: white;
  line-height: 1.3;
  margin-bottom: 24px;
  position: relative;
}

.story-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.9rem;
  position: relative;
}

.story-meta > span {
  display: flex;
  align-items: center;
  gap: 8px;
}

.story-meta i {
  opacity: 0.7;
}

.story-summary {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  position: relative;
}

.story-summary p {
  color: rgba(255, 255, 255, 0.95);
  font-size: 1.1rem;
  line-height: 1.8;
}

.story-content {
  margin-top: 40px;
}

.story-section {
  margin-bottom: 48px;
}

.story-section h2 {
  font-size: 1.5rem;
  color: #1e293b;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid #e2e8f0;
}

.story-section p {
  margin-bottom: 16px;
  line-height: 1.9;
}

.story-section blockquote {
  background: linear-gradient(135deg, #f8fafc, #f1f5f9);
  border-left: 4px solid #6366f1;
  padding: 24px;
  margin: 24px 0;
  border-radius: 0 12px 12px 0;
}

.story-section blockquote p {
  color: #475569;
  font-size: 1.05rem;
  font-style: italic;
}

.story-section ul {
  list-style: none;
  margin: 16px 0;
}

.story-section ul li {
  padding: 12px 0;
  padding-left: 28px;
  position: relative;
  border-bottom: 1px solid #f1f5f9;
}

.story-section ul li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: #10b981;
  font-weight: bold;
}

.story-section ol {
  list-style: none;
  counter-reset: step;
  margin: 16px 0;
}

.story-section ol li {
  padding: 12px 0;
  padding-left: 40px;
  position: relative;
  counter-increment: step;
}

.story-section ol li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 600;
}

.story-section code {
  background: #f1f5f9;
  padding: 4px 8px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: #6366f1;
}

/* 时间线样式 */
.timeline {
  position: relative;
  padding-left: 30px;
  margin: 30px 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, #6366f1, #8b5cf6);
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
}

.timeline-marker {
  position: absolute;
  left: -30px;
  top: 0;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: white;
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 600;
  white-space: nowrap;
}

.timeline-content {
  background: #f8fafc;
  padding: 24px;
  border-radius: 12px;
  margin-top: 40px;
}

.timeline-content h4 {
  color: #1e293b;
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.timeline-content p {
  color: #64748b;
  line-height: 1.8;
}

.timeline-content ul {
  margin-top: 16px;
}

/* 学员信息卡片 */
.author-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  font-weight: 700;
  flex-shrink: 0;
}

.story-sidebar {
  position: sticky;
  top: 100px;
  height: fit-content;
}

.sidebar-card {
  background: white;
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.sidebar-card h3 {
  font-size: 1.1rem;
  color: #1e293b;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.sidebar-card h3 i {
  color: #6366f1;
}

.related-item {
  display: flex;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid #f1f5f9;
  transition: all 0.3s;
}

.related-item:last-child {
  border-bottom: none;
}

.related-item:hover {
  background: #f8fafc;
  margin: 0 -12px;
  padding-left: 12px;
  padding-right: 12px;
  border-radius: 8px;
}

.related-item img {
  width: 80px;
  height: 60px;
  object-fit: cover;
  border-radius: 8px;
  flex-shrink: 0;
}

.related-item-content h4 {
  font-size: 0.9rem;
  color: #1e293b;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-item-content span {
  font-size: 0.8rem;
  color: #94a3b8;
}

/* 响应式调整 */
@media (max-width: 1024px) {
  .story-layout {
    grid-template-columns: 1fr;
  }
  
  .story-sidebar {
    position: static;
  }
}

@media (max-width: 768px) {
  .story-main {
    padding: 24px;
  }
  
  .story-header {
    margin: -24px -24px 24px -24px;
    padding: 40px 24px 24px;
  }
  
  .story-header h1 {
    font-size: 1.5rem;
  }
  
  .story-meta {
    gap: 16px;
  }
  
  .story-section h2 {
    font-size: 1.25rem;
  }
}

/* ==================== 全局返回按钮（固定在顶部导航栏） ==================== */
.back-btn {
  position: fixed;
  top: 20px;
  left: 20px;
  z-index: 9999;
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.95);
  color: var(--text-primary);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
  transition: all 0.3s;
  font-size: 18px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.back-btn:hover {
  background: #ffffff;
  transform: scale(1.08);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.back-btn:active {
  transform: scale(0.95);
}

/* 返回顶部按钮 */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 999;
  width: 44px;
  height: 44px;
  background: var(--text-secondary);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  transition: all 0.3s;
  font-size: 18px;
}

.back-to-top:hover {
  background: var(--text-primary);
  transform: scale(1.1);
}

.back-to-top.visible {
  display: flex;
}

/* 移动端适配 */
@media (max-width: 768px) {
  .back-btn {
    top: 16px;
    left: 16px;
    width: 40px;
    height: 40px;
    font-size: 16px;
  }
  
  .back-btn:hover {
    transform: scale(1.05);
  }
  
  .back-btn:active {
    transform: scale(0.92);
  }
  
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
  }
}