/* ============================================
   Hermes AI · 武汉绍庭法律咨询服务有限公司
   官网全局样式表  www.sttj.com.cn
   设计风格：现代SaaS · 科技绿 #07c160 · 深色导航
   ============================================ */

/* -------------------------------------------
   1. CSS 变量
   ------------------------------------------- */
:root {
  /* 品牌色 */
  --color-primary: #07c160;
  --color-primary-dark: #05a34f;
  --color-primary-light: #39d980;
  --color-primary-bg: rgba(7, 193, 96, 0.08);
  --color-primary-gradient: linear-gradient(135deg, #07c160 0%, #05a34f 100%);

  /* 深色导航 */
  --color-dark: #1a1a2e;
  --color-dark-light: #252542;
  --color-dark-lighter: #2d2d50;
  --color-dark-border: rgba(255, 255, 255, 0.08);

  /* 中性色 */
  --color-white: #ffffff;
  --color-bg: #f8f9fc;
  --color-bg-alt: #f0f2f8;
  --color-border: #e8ecf1;
  --color-border-light: #f0f2f5;

  /* 文本色 */
  --color-text: #1e2329;
  --color-text-secondary: #5a6072;
  --color-text-muted: #8c94a5;
  --color-text-inverse: #ffffff;
  --color-text-link: var(--color-primary);

  /* 功能色 */
  --color-success: #07c160;
  --color-warning: #faad14;
  --color-error: #f54538;
  --color-info: #1677ff;

  /* 字体 */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial,
    sans-serif;
  --font-family-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono',
    'Menlo', 'Courier New', monospace;

  /* 字号 */
  --font-size-xs: 12px;
  --font-size-sm: 13px;
  --font-size-base: 15px;
  --font-size-md: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 30px;
  --font-size-4xl: 36px;
  --font-size-5xl: 48px;
  --font-size-6xl: 60px;

  /* 行高 */
  --line-height-tight: 1.2;
  --line-height-base: 1.6;
  --line-height-loose: 1.8;

  /* 字重 */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  /* 间距 */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
  --spacing-4xl: 80px;
  --spacing-5xl: 120px;

  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* 阴影 */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.06);
  --shadow-card-hover: 0 8px 32px rgba(0, 0, 0, 0.1);
  --shadow-button: 0 4px 14px rgba(7, 193, 96, 0.35);

  /* 过渡 */
  --transition-fast: all 0.2s ease;
  --transition-base: all 0.3s ease;
  --transition-slow: all 0.45s ease;
  --transition-spring: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* 布局 */
  --header-height: 72px;
  --container-max: 1200px;
  --container-wide: 1400px;
  --content-padding: 24px;
}

/* -------------------------------------------
   2. 全局 Reset
   ------------------------------------------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-white);
  min-height: 100vh;
  overflow-x: hidden;
}

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

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

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

ul, ol {
  list-style: none;
}

table {
  border-collapse: collapse;
  width: 100%;
}

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

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

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
}

p {
  color: var(--color-text-secondary);
  line-height: var(--line-height-loose);
}

/* -------------------------------------------
   3. 排版系统
   ------------------------------------------- */
.heading-1 {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  letter-spacing: -0.02em;
}

.heading-2 {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  letter-spacing: -0.01em;
}

.heading-3 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
}

.heading-4 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
}

.heading-5 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
}

.body-large {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-loose);
}

.body-small {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-base);
}

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

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

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

.section-title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  text-align: center;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.01em;
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--spacing-2xl);
  line-height: var(--line-height-loose);
}

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

.container-wide {
  width: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--content-padding);
}

.section {
  padding: var(--spacing-4xl) 0;
}

.section-alt {
  background-color: var(--color-bg);
}

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

.section-dark .section-title,
.section-dark .section-subtitle {
  color: var(--color-text-inverse);
}

/* -------------------------------------------
   5. 深色导航栏（固定顶部）
   ------------------------------------------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: var(--color-dark);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--color-dark-border);
  transition: var(--transition-base);
}

.navbar.scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.navbar-inner {
  width: 100%;
  max-width: var(--container-max);
  padding: 0 var(--content-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-inverse);
}

.navbar-logo img {
  height: 36px;
  width: auto;
}

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

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

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

.navbar-nav a {
  color: rgba(255, 255, 255, 0.75);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-sm) 0;
  position: relative;
  transition: var(--transition-fast);
}

.navbar-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  transition: var(--transition-base);
}

.navbar-nav a:hover {
  color: var(--color-white);
}

.navbar-nav a:hover::after {
  width: 100%;
}

.navbar-nav a.active {
  color: var(--color-primary);
}

.navbar-nav a.active::after {
  width: 100%;
}

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

/* 移动端汉堡菜单 */
.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--spacing-xs);
  background: none;
  border: none;
}

.navbar-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text-inverse);
  border-radius: var(--radius-full);
  transition: var(--transition-base);
}

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

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

.navbar-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* -------------------------------------------
   6. Hero 区域（渐变背景）
   ------------------------------------------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--header-height) + var(--spacing-3xl)) 0 var(--spacing-3xl);
  background: linear-gradient(135deg, #0f0f23 0%, #1a1a2e 30%, #16213e 60%, #0f3460 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(7, 193, 96, 0.12) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(7, 193, 96, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  padding: 0 var(--content-padding);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 6px 16px;
  background: rgba(7, 193, 96, 0.12);
  border: 1px solid rgba(7, 193, 96, 0.25);
  border-radius: var(--radius-full);
  color: var(--color-primary-light);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-lg);
  backdrop-filter: blur(4px);
}

.hero-title {
  font-size: var(--font-size-6xl);
  font-weight: var(--font-weight-extrabold);
  color: var(--color-text-inverse);
  line-height: var(--line-height-tight);
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-lg);
}

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

.hero-description {
  font-size: var(--font-size-xl);
  color: rgba(255, 255, 255, 0.65);
  line-height: var(--line-height-loose);
  max-width: 640px;
  margin: 0 auto var(--spacing-xl);
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--spacing-3xl);
  margin-top: var(--spacing-3xl);
  padding-top: var(--spacing-2xl);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

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

.hero-stat-number {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}

.hero-stat-label {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.5);
}

/* -------------------------------------------
   7. 按钮系统
   ------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 12px 28px;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  border-radius: var(--radius-md);
  transition: var(--transition-base);
  cursor: pointer;
  white-space: nowrap;
  border: 2px solid transparent;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn:active {
  transform: scale(0.97);
}

/* 主按钮 */
.btn-primary {
  background: var(--color-primary-gradient);
  color: var(--color-white);
  box-shadow: var(--shadow-button);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, #048a43 100%);
  box-shadow: 0 6px 20px rgba(7, 193, 96, 0.45);
  transform: translateY(-2px);
  color: var(--color-white);
}

.btn-primary:active {
  transform: translateY(0) scale(0.97);
}

/* 次按钮 */
.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

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

.btn-secondary:active {
  transform: translateY(0) scale(0.97);
}

/* 幽灵按钮 */
.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: var(--color-border);
}

.btn-ghost:hover {
  background: var(--color-bg);
  border-color: var(--color-text-muted);
  color: var(--color-text);
  transform: translateY(-2px);
}

.btn-ghost:active {
  transform: translateY(0) scale(0.97);
}

/* 浅色幽灵按钮（在深色背景上） */
.btn-ghost-light {
  background: transparent;
  color: rgba(255, 255, 255, 0.8);
  border-color: rgba(255, 255, 255, 0.25);
}

.btn-ghost-light:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.4);
  color: var(--color-white);
  transform: translateY(-2px);
}

/* 按钮尺寸 */
.btn-sm {
  padding: 8px 18px;
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 16px 36px;
  font-size: var(--font-size-lg);
  border-radius: var(--radius-lg);
}

.btn-block {
  width: 100%;
}

/* 按钮带图标 */
.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-md);
}

.btn-icon.btn-sm {
  width: 32px;
  height: 32px;
}

.btn-icon.btn-lg {
  width: 48px;
  height: 48px;
}

/* -------------------------------------------
   8. 卡片网格组件
   ------------------------------------------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.card {
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

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

.card-icon {
  width: 48px;
  height: 48px;
  background: var(--color-primary-bg);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: var(--spacing-md);
  color: var(--color-primary);
  transition: var(--transition-base);
}

.card:hover .card-icon {
  background: var(--color-primary);
  color: var(--color-white);
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.card-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-loose);
  margin-bottom: var(--spacing-md);
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--color-primary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: var(--transition-fast);
}

.card-link:hover {
  gap: var(--spacing-sm);
  color: var(--color-primary-dark);
}

.card-link .arrow {
  transition: var(--transition-fast);
}

.card-link:hover .arrow {
  transform: translateX(4px);
}

/* 特色卡片（带顶部色条） */
.card-featured {
  border-top: 3px solid var(--color-primary);
}

/* 深色模式卡片 */
.card-dark {
  background: var(--color-dark-light);
  border-color: var(--color-dark-border);
}

.card-dark .card-title {
  color: var(--color-text-inverse);
}

.card-dark .card-desc {
  color: rgba(255, 255, 255, 0.6);
}

.card-dark:hover {
  background: var(--color-dark-lighter);
  border-color: transparent;
}

/* -------------------------------------------
   9. 新闻卡片组件
   ------------------------------------------- */
.news-card {
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-base);
}

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

.news-card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  overflow: hidden;
}

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

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

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

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

.news-card-tag {
  display: inline-flex;
  padding: 2px 10px;
  background: var(--color-primary-bg);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
}

.news-card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-sm);
  line-height: var(--line-height-tight);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-loose);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: var(--spacing-md);
}

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

/* -------------------------------------------
   10. 解决方案卡片组件
   ------------------------------------------- */
.solution-card {
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

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

.solution-card:hover::before {
  opacity: 1;
}

.solution-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-6px);
  border-color: transparent;
}

.solution-card-icon {
  width: 64px;
  height: 64px;
  background: var(--color-primary-bg);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--color-primary);
  margin-bottom: var(--spacing-lg);
  transition: var(--transition-base);
}

.solution-card:hover .solution-card-icon {
  background: var(--color-primary);
  color: var(--color-white);
  transform: scale(1.05) rotate(-4deg);
}

.solution-card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-sm);
}

.solution-card-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-loose);
  margin-bottom: var(--spacing-lg);
}

.solution-card-features {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.solution-card-feature {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.solution-card-feature .check {
  width: 18px;
  height: 18px;
  background: var(--color-primary-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 10px;
  flex-shrink: 0;
}

/* -------------------------------------------
   11. 团队介绍组件
   ------------------------------------------- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xl);
}

.team-card {
  text-align: center;
  transition: var(--transition-base);
}

.team-card:hover {
  transform: translateY(-4px);
}

.team-card-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  margin: 0 auto var(--spacing-md);
  background: var(--color-bg-alt);
  overflow: hidden;
  border: 3px solid transparent;
  transition: var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
  color: var(--color-text-muted);
}

.team-card:hover .team-card-avatar {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-bg);
}

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

.team-card-name {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-xs);
}

.team-card-role {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-sm);
}

.team-card-bio {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-base);
}

.team-card-social {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.team-card-social a {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  transition: var(--transition-fast);
}

.team-card-social a:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

/* -------------------------------------------
   12. 客户评价组件
   ------------------------------------------- */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.testimonial-card {
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: var(--transition-base);
  position: relative;
}

.testimonial-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
  border-color: transparent;
}

.testimonial-card::before {
  content: '"';
  position: absolute;
  top: 16px;
  left: 20px;
  font-size: 48px;
  line-height: 1;
  color: var(--color-primary);
  opacity: 0.2;
  font-family: Georgia, serif;
  font-weight: var(--font-weight-bold);
}

.testimonial-text {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: var(--line-height-loose);
  margin-bottom: var(--spacing-lg);
  font-style: italic;
  padding-top: var(--spacing-md);
}

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

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-primary-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-lg);
  flex-shrink: 0;
  overflow: hidden;
}

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

.testimonial-info-name {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  margin-bottom: 2px;
}

.testimonial-info-company {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.testimonial-rating {
  display: flex;
  gap: 2px;
  margin-top: var(--spacing-xs);
  color: var(--color-warning);
  font-size: var(--font-size-sm);
}

/* 深色背景评价卡片 */
.testimonial-card-dark {
  background: var(--color-dark-light);
  border-color: var(--color-dark-border);
}

.testimonial-card-dark .testimonial-text {
  color: rgba(255, 255, 255, 0.7);
}

.testimonial-card-dark .testimonial-info-name {
  color: var(--color-text-inverse);
}

/* -------------------------------------------
   13. 表单组件
   ------------------------------------------- */
.form-group {
  margin-bottom: var(--spacing-lg);
}

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

.form-label .required {
  color: var(--color-error);
  margin-left: 2px;
}

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

.form-input:hover,
.form-textarea:hover,
.form-select:hover {
  border-color: var(--color-text-muted);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-bg);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-muted);
}

.form-input.error,
.form-textarea.error {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(245, 69, 56, 0.1);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%238c94a5' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
  cursor: pointer;
}

.form-hint {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--spacing-xs);
}

.form-error {
  font-size: var(--font-size-xs);
  color: var(--color-error);
  margin-top: var(--spacing-xs);
}

.form-checkbox,
.form-radio {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.form-checkbox input[type="checkbox"],
.form-radio input[type="radio"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
}

/* -------------------------------------------
   14. 登录表单样式
   ------------------------------------------- */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  padding: var(--spacing-lg);
}

.login-container {
  width: 100%;
  max-width: 420px;
}

.login-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-lg);
}

.login-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.login-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: var(--color-primary-gradient);
  border-radius: var(--radius-lg);
  font-size: 24px;
  color: white;
  margin-bottom: var(--spacing-md);
}

.login-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-xs);
}

.login-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.login-divider {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.login-divider::before,
.login-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

.login-footer {
  text-align: center;
  margin-top: var(--spacing-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.login-footer a {
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
}

.login-footer a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

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

.login-social-btn {
  width: 44px;
  height: 44px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  transition: var(--transition-fast);
  background: var(--color-white);
}

.login-social-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-bg);
}

.login-forgot {
  text-align: right;
  margin-top: var(--spacing-xs);
}

.login-forgot a {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

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

/* -------------------------------------------
   15. 面包屑导航
   ------------------------------------------- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  padding: var(--spacing-md) 0;
  flex-wrap: wrap;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.breadcrumb-item a {
  color: var(--color-text-muted);
  transition: var(--transition-fast);
}

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

.breadcrumb-item.current {
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
}

.breadcrumb-separator {
  color: var(--color-border);
  font-size: var(--font-size-xs);
}

.breadcrumb-separator svg {
  width: 12px;
  height: 12px;
}

/* -------------------------------------------
   16. 聊天悬浮按钮
   ------------------------------------------- */
.chat-float {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--spacing-sm);
}

.chat-float-button {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-primary-gradient);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: 0 4px 20px rgba(7, 193, 96, 0.4);
  cursor: pointer;
  transition: var(--transition-base);
  border: none;
  position: relative;
}

.chat-float-button:hover {
  transform: scale(1.1) translateY(-2px);
  box-shadow: 0 6px 28px rgba(7, 193, 96, 0.5);
}

.chat-float-button:active {
  transform: scale(0.95);
}

.chat-float-button .pulse {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 2px solid var(--color-primary);
  animation: chat-pulse 2s infinite;
}

.chat-float-tooltip {
  background: var(--color-dark);
  color: var(--color-text-inverse);
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  white-space: nowrap;
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(8px);
  transition: var(--transition-base);
  pointer-events: none;
}

.chat-float:hover .chat-float-tooltip {
  opacity: 1;
  transform: translateY(0);
}

@keyframes chat-pulse {
  0% {
    transform: scale(1);
    opacity: 0.6;
  }
  100% {
    transform: scale(1.6);
    opacity: 0;
  }
}

/* 聊天窗口浮层 */
.chat-widget {
  position: fixed;
  bottom: 100px;
  right: 32px;
  width: 380px;
  max-height: 600px;
  background: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  z-index: 998;
  display: none;
  flex-direction: column;
  overflow: hidden;
  animation: chat-slide-up 0.3s ease;
}

.chat-widget.open {
  display: flex;
}

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

.chat-widget-header {
  background: var(--color-primary-gradient);
  color: var(--color-white);
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.chat-widget-title {
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
}

.chat-widget-close {
  color: rgba(255, 255, 255, 0.8);
  cursor: pointer;
  font-size: var(--font-size-lg);
  transition: var(--transition-fast);
}

.chat-widget-close:hover {
  color: var(--color-white);
  transform: rotate(90deg);
}

.chat-widget-body {
  flex: 1;
  padding: var(--spacing-md);
  overflow-y: auto;
  background: var(--color-bg);
}

.chat-widget-footer {
  padding: var(--spacing-md);
  border-top: 1px solid var(--color-border-light);
  display: flex;
  gap: var(--spacing-sm);
}

.chat-widget-input {
  flex: 1;
  padding: 10px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  transition: var(--transition-fast);
}

.chat-widget-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-bg);
}

.chat-widget-send {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
  flex-shrink: 0;
}

.chat-widget-send:hover {
  background: var(--color-primary-dark);
  transform: scale(1.05);
}

/* -------------------------------------------
   17. 页脚
   ------------------------------------------- */
.footer {
  background: var(--color-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--spacing-4xl) 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: var(--spacing-2xl);
  padding-bottom: var(--spacing-3xl);
  border-bottom: 1px solid var(--color-dark-border);
}

.footer-brand {
  max-width: 320px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-inverse);
  margin-bottom: var(--spacing-md);
}

.footer-logo img {
  height: 32px;
  width: auto;
}

.footer-logo .logo-icon {
  width: 32px;
  height: 32px;
  background: var(--color-primary-gradient);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-extrabold);
  font-size: var(--font-size-base);
  color: white;
}

.footer-desc {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-loose);
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: var(--spacing-lg);
}

.footer-social {
  display: flex;
  gap: var(--spacing-sm);
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: var(--font-size-base);
  transition: var(--transition-fast);
}

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

.footer-column-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-inverse);
  margin-bottom: var(--spacing-lg);
}

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

.footer-links a {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.5);
  transition: var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-primary);
  padding-left: 4px;
}

.footer-bottom {
  padding: var(--spacing-lg) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.35);
}

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

.footer-bottom-links a {
  color: rgba(255, 255, 255, 0.35);
  font-size: var(--font-size-xs);
}

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

/* -------------------------------------------
   18. 页脚导航辅助
   ------------------------------------------- */
.footer-nav-group {
  display: flex;
  flex-direction: column;
}

.footer-nav-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-inverse);
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-nav-list a {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.5);
  transition: var(--transition-fast);
  position: relative;
  padding-left: 0;
}

.footer-nav-list a::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 1px;
  background: var(--color-primary);
  transition: var(--transition-fast);
}

.footer-nav-list a:hover {
  color: var(--color-primary);
  padding-left: 12px;
}

.footer-nav-list a:hover::before {
  width: 6px;
}

/* -------------------------------------------
   19. 动画
   ------------------------------------------- */
/* 淡入动画 */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in-scale.visible {
  opacity: 1;
  transform: scale(1);
}

/* 延迟辅助类 */
.delay-100 { transition-delay: 0.1s; }
.delay-200 { transition-delay: 0.2s; }
.delay-300 { transition-delay: 0.3s; }
.delay-400 { transition-delay: 0.4s; }
.delay-500 { transition-delay: 0.5s; }

/* 渐入动画关键帧 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* 平滑滚动 */
html {
  scroll-behavior: smooth;
}

/* -------------------------------------------
   20. 响应式断点
   ------------------------------------------- */
/* 平板 (≤1024px) */
@media (max-width: 1024px) {
  :root {
    --header-height: 64px;
    --font-size-6xl: 44px;
    --font-size-5xl: 38px;
    --font-size-4xl: 30px;
    --font-size-3xl: 26px;
    --spacing-4xl: 60px;
    --spacing-3xl: 48px;
    --spacing-2xl: 36px;
  }

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

  .team-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
  }

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

  .footer-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
  }

  .solution-card {
    padding: var(--spacing-xl);
  }
}

/* 移动端 (≤768px) */
@media (max-width: 768px) {
  :root {
    --header-height: 60px;
    --font-size-6xl: 34px;
    --font-size-5xl: 30px;
    --font-size-4xl: 26px;
    --font-size-3xl: 22px;
    --font-size-2xl: 20px;
    --font-size-xl: 18px;
    --font-size-lg: 16px;
    --spacing-4xl: 48px;
    --spacing-3xl: 40px;
    --spacing-2xl: 32px;
    --content-padding: 16px;
  }

  .navbar-nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-dark);
    flex-direction: column;
    padding: var(--spacing-lg);
    gap: var(--spacing-md);
    border-bottom: 1px solid var(--color-dark-border);
    box-shadow: var(--shadow-lg);
  }

  .navbar-nav.open {
    display: flex;
  }

  .navbar-nav a {
    font-size: var(--font-size-base);
    padding: var(--spacing-sm) 0;
  }

  .navbar-toggle {
    display: flex;
  }

  .navbar-actions .btn {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: calc(var(--header-height) + var(--spacing-2xl)) 0 var(--spacing-2xl);
  }

  .hero-title {
    font-size: var(--font-size-5xl);
  }

  .hero-description {
    font-size: var(--font-size-base);
  }

  .hero-stats {
    flex-wrap: wrap;
    gap: var(--spacing-lg);
  }

  .hero-stat {
    flex: 1;
    min-width: 80px;
  }

  .hero-stat-number {
    font-size: var(--font-size-2xl);
  }

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

  .team-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
  }

  .team-card-avatar {
    width: 80px;
    height: 80px;
  }

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

  .form-row {
    grid-template-columns: 1fr;
  }

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

  .footer-brand {
    grid-column: 1 / -1;
  }

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

  .chat-float {
    bottom: 20px;
    right: 20px;
  }

  .chat-float-button {
    width: 48px;
    height: 48px;
    font-size: 20px;
  }

  .chat-widget {
    right: 16px;
    left: 16px;
    width: auto;
    bottom: 80px;
    max-height: 70vh;
  }

  .login-card {
    padding: var(--spacing-xl);
  }

  .login-container {
    max-width: 100%;
  }

  .breadcrumb {
    font-size: var(--font-size-xs);
    gap: var(--spacing-xs);
  }

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

  .solution-card {
    padding: var(--spacing-lg);
  }
}

/* 小屏手机 (≤480px) */
@media (max-width: 480px) {
  :root {
    --font-size-6xl: 28px;
    --font-size-5xl: 26px;
    --font-size-4xl: 22px;
  }

  .hero-title {
    font-size: var(--font-size-4xl);
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

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

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

  .navbar-actions .btn-sm {
    display: inline-flex;
    padding: 6px 14px;
    font-size: var(--font-size-xs);
  }
}

/* -------------------------------------------
   21. 辅助类
   ------------------------------------------- */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }

.hidden { display: none; }
.visible { display: block; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* 滚动条美化 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

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

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* 选中文本 */
::selection {
  background: var(--color-primary);
  color: var(--color-white);
}

/* 加载动画 */
@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-spinner {
  width: 24px;
  height: 24px;
  border: 2.5px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

/* 骨架屏 */
.skeleton {
  background: linear-gradient(90deg, var(--color-bg) 25%, var(--color-border-light) 50%, var(--color-bg) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

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

/* === HTML class aliases for page compatibility === */
.nav-links { display: flex; align-items: center; gap: var(--spacing-md); }
.mobile-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: var(--spacing-xs); background: none; border: none; }
@media (max-width: 768px) {
  .nav-links { display: none; flex-direction: column; width: 100%; background: var(--color-dark); position: absolute; top: var(--header-height); left: 0; padding: var(--spacing-md); }
  .nav-links.show { display: flex; }
  .nav-links a { padding: var(--spacing-sm) 0; }
  .mobile-toggle { display: flex; }
}
.logo { font-size: 20px; font-weight: 700; color: #fff; text-decoration: none; display: flex; align-items: center; gap: 8px; }
.logo:hover { opacity: 0.9; }


/* === Page Hero / Title Section === */
.page-hero { padding: 120px 0 80px; text-align: center; color: #fff; }
.page-hero h1 { font-size: 42px; font-weight: 700; margin-bottom: 16px; color: #fff; }
.page-hero p { font-size: 18px; color: rgba(255,255,255,0.75); max-width: 600px; margin: 0 auto; line-height: 1.8; }

/* === Breadcrumb === */
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: #999; padding: 16px 0; }
.breadcrumb a { color: var(--color-primary); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span { color: #999; }

/* === Filter Tags === */
.filter-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 24px; }
.filter-tag { padding: 6px 16px; border-radius: 20px; border: 1px solid #ddd; font-size: 13px; cursor: pointer; background: #fff; transition: all 0.3s; }
.filter-tag:hover { border-color: var(--color-primary); color: var(--color-primary); }
.filter-tag.active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* === Newsletter Section === */
.newsletter { background: var(--color-dark); padding: 60px 0; text-align: center; color: #fff; }
.newsletter h2 { font-size: 28px; margin-bottom: 12px; }
.newsletter p { color: rgba(255,255,255,0.7); margin-bottom: 24px; }
.newsletter-form { display: flex; max-width: 500px; margin: 0 auto; gap: 0; }
.newsletter-form input { flex: 1; padding: 14px 20px; border: none; border-radius: 6px 0 0 6px; font-size: 15px; outline: none; }
.newsletter-form button { padding: 14px 28px; background: var(--color-primary); color: #fff; border: none; border-radius: 0 6px 6px 0; font-size: 15px; cursor: pointer; }

/* === Pagination === */
.pagination { display: flex; justify-content: center; gap: 4px; margin-top: 40px; }
.pagination a { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: 6px; border: 1px solid #ddd; font-size: 14px; color: #333; text-decoration: none; transition: all 0.3s; }
.pagination a:hover { border-color: var(--color-primary); color: var(--color-primary); }
.pagination a.active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* === Stats / Numbers === */
.stats-bar { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; padding: 60px 0; text-align: center; }
.stat-item h3 { font-size: 36px; font-weight: 700; color: var(--color-primary); margin-bottom: 4px; }
.stat-item p { font-size: 14px; color: #666; }
@media (max-width: 768px) { .stats-bar { grid-template-columns: repeat(2, 1fr); } }

/* === Feature / Advantage Cards === */
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; margin: 40px 0; }
.feature-card { background: #fff; border-radius: 12px; padding: 32px 24px; text-align: center; box-shadow: var(--shadow-sm); transition: var(--transition-base); border: 1px solid #eee; }
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.feature-card .icon { font-size: 40px; margin-bottom: 16px; }
.feature-card h3 { font-size: 18px; margin-bottom: 8px; color: var(--color-dark); }
.feature-card p { font-size: 14px; color: #666; line-height: 1.6; }

/* Nav buttons (login) */
.nav-buttons { display: flex; align-items: center; gap: 8px; }
.nav-buttons .btn { padding: 6px 18px; font-size: 13px; border-radius: 6px; }
@media (max-width: 768px) { .nav-buttons { display: none; } }