/* ============================================
   赤峰市盛煜坤策智能科技有限公司 - 官网样式
   设计系统：科技蓝主色调，现代无衬线字体
   ============================================ */

/* CSS 变量定义 */
:root {
  /* 主色系 - 科技蓝 */
  --color-primary: #1A5FFF;
  --color-primary-dark: #0A2E6F;
  --color-primary-light: #3B7EFF;
  --color-primary-lighter: #E8F0FF;
  --color-accent: #00D4FF;
  --color-accent-dark: #00A8CC;

  /* 中性色 */
  --color-dark: #0A1628;
  --color-text: #1E293B;
  --color-text-secondary: #64748B;
  --color-text-light: #94A3B8;
  --color-border: #E2E8F0;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F8FAFC;
  --color-bg-dark: #0A1628;

  /* 渐变 */
  --gradient-primary: linear-gradient(135deg, #1A5FFF 0%, #00D4FF 100%);
  --gradient-dark: linear-gradient(135deg, #0A1628 0%, #0A2E6F 100%);
  --gradient-hero: linear-gradient(135deg, #0A1628 0%, #0A2E6F 50%, #1A5FFF 100%);

  /* 字体 */
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", monospace;

  /* 间距 */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

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

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-blue: 0 8px 24px rgba(26, 95, 255, 0.2);

  /* 过渡 */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* 布局 */
  --header-height: 72px;
  --container-max: 1200px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* 移动端菜单打开时禁止背景滚动 */
body.menu-open {
  overflow: hidden;
  position: fixed;
  width: 100%;
}

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

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

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

ul, ol {
  list-style: none;
}

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

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

/* ============================================
   布局工具类
   ============================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

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

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

.section-dark {
  background: var(--color-bg-dark);
  color: #fff;
}

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

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

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

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: #fff;
}

h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
h4 { font-size: 1.25rem; }

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

.section-subtitle {
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto var(--space-3xl);
}

.section-dark .section-subtitle {
  color: rgba(255, 255, 255, 0.7);
}

.badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--color-primary-lighter);
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.badge-accent {
  background: rgba(0, 212, 255, 0.15);
  color: var(--color-accent);
}

/* ============================================
   按钮
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  transition: all var(--transition-base);
  white-space: nowrap;
  cursor: pointer;
}

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

.btn-primary:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(26, 95, 255, 0.3);
}

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

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

.btn-white {
  background: #fff;
  color: var(--color-primary);
}

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

.btn-ghost {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
}

/* ============================================
   头部导航
   ============================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: all var(--transition-base);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-dark);
}

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

.logo-img {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  display: block;
  flex-shrink: 0;
}

.site-footer .logo-img {
  width: 44px;
  height: 44px;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.3rem;
  font-weight: 800;
  flex-shrink: 0;
}

.logo-text {
  line-height: 1.2;
}

.logo-text small {
  display: block;
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--color-text-secondary);
}

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

.main-nav a {
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: var(--space-sm) 0;
}

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

.main-nav a:hover::after,
.main-nav a.active::after {
  width: 100%;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-primary);
}

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

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-sm);
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-dark);
  transition: all var(--transition-base);
  border-radius: 2px;
}

.menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

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

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(0, 212, 255, 0.15) 0%, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(26, 95, 255, 0.2) 0%, transparent 40%);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
  width: 100%;
}

.hero-content {
  color: #fff;
}

.hero-content h1 {
  color: #fff;
  margin-bottom: var(--space-lg);
  line-height: 1.2;
}

.hero-content h1 .highlight {
  background: linear-gradient(135deg, #00D4FF 0%, #FFFFFF 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content p {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--space-2xl);
  max-width: 520px;
}

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

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-card {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  width: 100%;
  max-width: 420px;
}

.hero-card h3 {
  color: #fff;
  font-size: 1.1rem;
  margin-bottom: var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.hero-card h3::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 50%;
  display: inline-block;
}

.ai-platform-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 380px;
  overflow-y: auto;
  padding-right: 6px;
}

.ai-platform-list::-webkit-scrollbar {
  width: 4px;
}

.ai-platform-list::-webkit-scrollbar-thumb {
  background: rgba(0, 212, 255, 0.3);
  border-radius: 2px;
}

.ai-platform-list::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 212, 255, 0.5);
}

.ai-platform-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.ai-platform-item:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(0, 212, 255, 0.3);
}

.ai-platform-name {
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255, 255, 255, 0.92);
  font-size: 0.92rem;
  font-weight: 500;
}

.ai-platform-icon {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.ai-platform-icon img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
}

.ai-platform-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: #00D4FF;
}

.ai-platform-status::before {
  content: '';
  width: 6px;
  height: 6px;
  background: #00D4FF;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* 页面通用 Hero (内页) */
.page-hero {
  padding: calc(var(--header-height) + var(--space-4xl)) 0 var(--space-3xl);
  background: var(--gradient-dark);
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(circle at 30% 50%, rgba(0, 212, 255, 0.1) 0%, transparent 50%);
}

.page-hero .container {
  position: relative;
  z-index: 1;
}

.page-hero h1 {
  color: #fff;
  margin-bottom: var(--space-md);
}

.page-hero p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.7);
}

.breadcrumb a:hover {
  color: #fff;
}

.breadcrumb span {
  color: rgba(255, 255, 255, 0.3);
}

/* ============================================
   统计数据
   ============================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

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

.stat-number {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: var(--space-sm);
}

.section-dark .stat-number {
  background: linear-gradient(135deg, #00D4FF 0%, #FFFFFF 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

.section-dark .stat-label {
  color: rgba(255, 255, 255, 0.6);
}

/* ============================================
   服务卡片
   ============================================ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.service-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

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

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

.service-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--color-primary-lighter);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  font-size: 1.5rem;
}

.service-card h3 {
  font-size: 1.2rem;
  margin-bottom: var(--space-md);
}

.service-card p {
  color: var(--color-text-secondary);
  font-size: 0.92rem;
  margin-bottom: var(--space-lg);
  line-height: 1.7;
}

.service-features {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.service-features li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.88rem;
  color: var(--color-text);
}

.service-features li::before {
  content: '✓';
  color: var(--color-primary);
  font-weight: 700;
  flex-shrink: 0;
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.9rem;
  margin-top: var(--space-lg);
  transition: gap var(--transition-fast);
}

.service-link:hover {
  gap: var(--space-sm);
}

/* ============================================
   优势区域
   ============================================ */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2xl);
}

.advantage-item {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
}

.advantage-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary);
  opacity: 0.2;
  line-height: 1;
  flex-shrink: 0;
}

.advantage-content h4 {
  font-size: 1.1rem;
  margin-bottom: var(--space-sm);
}

.advantage-content p {
  color: var(--color-text-secondary);
  font-size: 0.92rem;
}

/* ============================================
   案例展示
   ============================================ */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.case-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

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

.case-image {
  width: 100%;
  height: 200px;
  background: var(--gradient-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.case-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26, 95, 255, 0.3) 0%, rgba(0, 212, 255, 0.2) 100%);
}

.case-image .case-icon {
  font-size: 3rem;
  position: relative;
  z-index: 1;
}

.case-body {
  padding: var(--space-xl);
}

.case-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--color-primary-lighter);
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.case-body h3 {
  font-size: 1.1rem;
  margin-bottom: var(--space-sm);
}

.case-body p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin-bottom: var(--space-md);
}

.case-stats {
  display: flex;
  gap: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
}

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

.case-stat strong {
  display: block;
  font-size: 1.3rem;
  color: var(--color-primary);
  font-weight: 700;
}

.case-stat span {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

/* ============================================
   文章卡片
   ============================================ */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.blog-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

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

.blog-card-image {
  width: 100%;
  height: 180px;
  background: var(--gradient-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.blog-card-image .blog-icon {
  font-size: 2.5rem;
}

.blog-card-body {
  padding: var(--space-xl);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: 0.8rem;
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
}

.blog-card-category {
  color: var(--color-primary);
  font-weight: 600;
}

.blog-card h3 {
  font-size: 1.05rem;
  margin-bottom: var(--space-sm);
  line-height: 1.4;
}

.blog-card h3 a {
  color: var(--color-dark);
}

.blog-card h3 a:hover {
  color: var(--color-primary);
}

.blog-card p {
  color: var(--color-text-secondary);
  font-size: 0.88rem;
  flex: 1;
  margin-bottom: var(--space-md);
}

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

.blog-card-author {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.82rem;
  color: var(--color-text-secondary);
}

.blog-card-author .author-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
}

/* 文章分类筛选 */
.blog-filters {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-3xl);
  flex-wrap: wrap;
}

.blog-filter {
  padding: 8px 20px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  cursor: pointer;
}

.blog-filter:hover,
.blog-filter.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* ============================================
   文章详情
   ============================================ */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--space-3xl);
  align-items: start;
}

.article-main {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: var(--space-3xl);
  border: 1px solid var(--color-border);
}

.article-header {
  margin-bottom: var(--space-2xl);
  padding-bottom: var(--space-2xl);
  border-bottom: 1px solid var(--color-border);
}

.article-header h1 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: var(--space-md);
  line-height: 1.4;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
  color: var(--color-text-secondary);
  font-size: 0.88rem;
}

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

.article-content {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--color-text);
}

.article-content h2 {
  font-size: 1.4rem;
  margin: var(--space-2xl) 0 var(--space-md);
}

.article-content h3 {
  font-size: 1.15rem;
  margin: var(--space-xl) 0 var(--space-md);
}

.article-content p {
  margin-bottom: var(--space-md);
}

.article-content ul, .article-content ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-xl);
}

.article-content ul li, .article-content ol li {
  margin-bottom: var(--space-sm);
  list-style: disc;
}

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

.article-content blockquote {
  border-left: 4px solid var(--color-primary);
  background: var(--color-primary-lighter);
  padding: var(--space-md) var(--space-lg);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-bottom: var(--space-md);
  color: var(--color-text);
  font-style: italic;
}

.article-content code {
  background: var(--color-bg-alt);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--color-primary-dark);
}

.article-content pre {
  background: var(--color-bg-dark);
  color: #e2e8f0;
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: var(--space-md);
}

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

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-md);
}

.article-content th, .article-content td {
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  text-align: left;
}

.article-content th {
  background: var(--color-bg-alt);
  font-weight: 600;
}

/* 文章侧边栏 */
.article-sidebar {
  position: sticky;
  top: calc(var(--header-height) + var(--space-xl));
}

.sidebar-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.sidebar-card h3 {
  font-size: 1.05rem;
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 2px solid var(--color-primary);
}

.sidebar-post {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
}

.sidebar-post:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.sidebar-post:first-child {
  padding-top: 0;
}

.sidebar-post-num {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  opacity: 0.3;
  flex-shrink: 0;
  line-height: 1;
}

.sidebar-post h4 {
  font-size: 0.88rem;
  line-height: 1.4;
  margin-bottom: var(--space-xs);
}

.sidebar-post h4 a {
  color: var(--color-text);
}

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

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

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

.sidebar-tag {
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  background: var(--color-bg-alt);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.sidebar-tag:hover {
  background: var(--color-primary-lighter);
  color: var(--color-primary);
  border-color: var(--color-primary-lighter);
}

/* ============================================
   FAQ 手风琴
   ============================================ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  overflow: hidden;
  transition: all var(--transition-base);
}

.faq-item.active {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-xl);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-dark);
  text-align: left;
  transition: color var(--transition-fast);
}

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

.faq-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform var(--transition-base);
  color: var(--color-primary);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
}

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

.faq-answer-inner {
  padding: 0 var(--space-xl) var(--space-lg);
  color: var(--color-text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* ============================================
   关于我们
   ============================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.about-visual {
  position: relative;
}

.about-visual-card {
  background: var(--gradient-dark);
  border-radius: var(--radius-xl);
  padding: var(--space-3xl);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.about-visual-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.2) 0%, transparent 70%);
  border-radius: 50%;
}

.about-visual-card h3 {
  color: #fff;
  margin-bottom: var(--space-lg);
  position: relative;
}

.about-visual-card p {
  color: rgba(255, 255, 255, 0.7);
  position: relative;
  margin-bottom: var(--space-md);
}

.about-visual-card .company-name {
  font-size: 1.3rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--space-sm);
}

.about-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: var(--space-xl);
  position: relative;
}

.about-info-item {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
}

.about-info-item .info-label {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.85rem;
  min-width: 80px;
}

.about-info-item .info-value {
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.9rem;
}

/* 发展历程 */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  width: 50%;
  padding: 0 var(--space-2xl) var(--space-2xl) 0;
}

.timeline-item:nth-child(even) {
  margin-left: 50%;
  padding: 0 0 var(--space-2xl) var(--space-2xl);
}

.timeline-item::before {
  content: '';
  position: absolute;
  right: -7px;
  top: 6px;
  width: 14px;
  height: 14px;
  background: var(--color-primary);
  border: 3px solid #fff;
  border-radius: 50%;
  box-shadow: 0 0 0 2px var(--color-primary);
}

.timeline-item:nth-child(even)::before {
  right: auto;
  left: -7px;
}

.timeline-year {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.timeline-content h4 {
  font-size: 1rem;
  margin-bottom: var(--space-sm);
}

.timeline-content p {
  color: var(--color-text-secondary);
  font-size: 0.88rem;
}

/* 价值观卡片 */
.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

.value-card {
  text-align: center;
  padding: var(--space-2xl);
  border-radius: var(--radius-lg);
  background: var(--color-bg-alt);
  transition: all var(--transition-base);
}

.value-card:hover {
  background: #fff;
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.value-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto var(--space-md);
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #fff;
}

.value-card h4 {
  font-size: 1rem;
  margin-bottom: var(--space-sm);
}

.value-card p {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

/* ============================================
   服务详情页
   ============================================ */
.service-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
  margin-bottom: var(--space-4xl);
}

.service-detail:nth-child(even) {
  direction: rtl;
}

.service-detail:nth-child(even) > * {
  direction: ltr;
}

.service-detail-content h2 {
  margin-bottom: var(--space-md);
}

.service-detail-content p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

.service-detail-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.service-detail-list li {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
}

.service-detail-list .list-icon {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-lighter);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  flex-shrink: 0;
}

.service-detail-list .list-text strong {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.service-detail-list .list-text span {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.service-detail-visual {
  background: var(--gradient-dark);
  border-radius: var(--radius-xl);
  padding: var(--space-3xl);
  color: #fff;
  position: relative;
  overflow: hidden;
  min-height: 320px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.service-detail-visual::before {
  content: '';
  position: absolute;
  bottom: -30%;
  right: -20%;
  width: 250px;
  height: 250px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.service-detail-visual h3 {
  color: #fff;
  margin-bottom: var(--space-lg);
  position: relative;
}

.service-detail-visual p {
  color: rgba(255, 255, 255, 0.7);
  position: relative;
  font-size: 0.9rem;
  margin-bottom: var(--space-md);
}

.service-process {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  position: relative;
}

.service-process-step {
  display: flex;
  gap: var(--space-md);
  align-items: center;
  padding: var(--space-md);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  position: relative;
}

.process-step-num {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.process-step-text strong {
  display: block;
  font-size: 0.9rem;
  color: #fff;
}

.process-step-text span {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
}

/* ============================================
   联系页面
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
}

.contact-form {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-3xl);
}

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

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.form-group label .required {
  color: #ef4444;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
  background: var(--color-bg-alt);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(26, 95, 255, 0.1);
}

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

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

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.contact-info-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
  transition: all var(--transition-base);
}

.contact-info-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.contact-info-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--color-primary-lighter);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.contact-info-card h4 {
  font-size: 1rem;
  margin-bottom: var(--space-xs);
}

.contact-info-card p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

.contact-map {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 240px;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

/* ============================================
   CTA 区域
   ============================================ */
.cta-section {
  background: var(--gradient-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-3xl);
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  border-radius: 50%;
}

.cta-section h2 {
  color: #fff;
  margin-bottom: var(--space-md);
  position: relative;
}

.cta-section p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1.05rem;
  max-width: 500px;
  margin: 0 auto var(--space-2xl);
  position: relative;
}

.cta-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
}

/* ============================================
   页脚
   ============================================ */
.site-footer {
  background: var(--color-bg-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-3xl) 0 var(--space-xl);
}

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

.footer-brand .logo {
  color: #fff;
  margin-bottom: var(--space-md);
}

.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

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

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 1rem;
  transition: all var(--transition-base);
}

.footer-social a:hover {
  background: var(--color-primary);
  color: #fff;
}

.footer-col h4 {
  color: #fff;
  font-size: 0.95rem;
  margin-bottom: var(--space-lg);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-col ul a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.88rem;
  transition: color var(--transition-fast);
}

.footer-col ul a:hover {
  color: var(--color-accent);
}

.footer-contact-item {
  display: flex;
  gap: var(--space-sm);
  font-size: 0.85rem;
  margin-bottom: var(--space-sm);
  color: rgba(255, 255, 255, 0.6);
}

.footer-contact-item span {
  flex-shrink: 0;
}

.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.4);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.4);
}

.footer-bottom a:hover {
  color: rgba(255, 255, 255, 0.7);
}

/* ============================================
   响应式设计
   断点：1024px 平板横屏 / 768px 平板竖屏 / 480px 大屏手机 / 360px 小屏手机
   ============================================ */

/* ---------- 1024px 平板横屏 / 小屏笔记本 ---------- */
@media (max-width: 1024px) {
  :root {
    --header-height: 68px;
  }

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

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

  /* Hero */
  .hero {
    min-height: auto;
    padding: calc(var(--header-height) + var(--space-3xl)) 0 var(--space-3xl);
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
    text-align: center;
  }

  .hero-content p {
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-visual {
    display: none;
  }

  /* 网格降为两列 */
  .services-grid,
  .cases-grid,
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-sidebar {
    position: static;
  }

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

  /* 页面内页Hero */
  .page-hero {
    padding: calc(var(--header-height) + var(--space-3xl)) 0 var(--space-2xl);
  }

  .page-hero h1 {
    font-size: clamp(1.5rem, 5vw, 2rem);
  }

  /* 服务详情 */
  .service-detail {
    gap: var(--space-2xl);
  }

  .service-detail-visual {
    min-height: 260px;
    padding: var(--space-2xl);
  }

  /* Logo文字调整 */
  .logo-text {
    font-size: 1rem;
  }

  .logo-text small {
    font-size: 0.65rem;
  }
}

/* ---------- 768px 平板竖屏 ---------- */
@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }

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

  .section {
    padding: var(--space-2xl) 0;
  }

  .section-sm {
    padding: var(--space-2xl) 0;
  }

  /* =====================
     头部导航
     ===================== */
  .site-header {
    background: rgba(255, 255, 255, 0.98);
  }

  .header-inner {
    padding: 0 var(--space-md);
  }

  /* Logo 在移动端略缩小 */
  .logo {
    font-size: 1rem;
    gap: var(--space-xs);
  }

  .logo-img {
    width: 34px;
    height: 34px;
  }

  .logo-text small {
    display: none;
  }

  /* 汉堡菜单 */
  .menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 10px;
    border-radius: var(--radius-sm);
  }

  /* 导航菜单 - 下拉式 */
  .main-nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: var(--space-xl);
    gap: 0;
    box-shadow: var(--shadow-lg);
    border-top: 1px solid var(--color-border);
    overflow-y: auto;
    z-index: 999;
  }

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

  .main-nav a {
    display: flex;
    align-items: center;
    padding: 14px 0;
    font-size: 1.05rem;
    border-bottom: 1px solid var(--color-border);
    width: 100%;
  }

  .main-nav a::after {
    display: none;
  }

  .main-nav a:last-child {
    border-bottom: none;
  }

  /* CTA按钮在移动端隐藏，移到菜单底部 */
  .header-cta .btn {
    display: none;
  }

  /* body 菜单打开时禁止滚动 */
  body.menu-open {
    overflow: hidden;
  }

  /* =====================
     Hero 区域
     ===================== */
  .hero {
    min-height: auto;
    padding: calc(var(--header-height) + var(--space-2xl)) 0 var(--space-2xl);
  }

  .hero-content h1 {
    font-size: clamp(1.4rem, 6vw, 1.9rem);
    margin-bottom: var(--space-md);
  }

  .hero-content p {
    font-size: 0.95rem;
    margin-bottom: var(--space-xl);
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
    padding: 14px 24px;
    font-size: 1rem;
    min-height: 48px;
  }

  /* =====================
     网格全面改为单列
     ===================== */
  .services-grid,
  .cases-grid,
  .blog-grid,
  .advantages-grid,
  .about-grid,
  .contact-grid,
  .service-detail,
  .values-grid,
  .stats-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  /* 数据统计两列 */
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
  }

  /* 服务详情反转恢复 */
  .service-detail:nth-child(even) {
    direction: ltr;
  }

  .service-detail-visual {
    min-height: auto;
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
  }

  .service-detail {
    margin-bottom: var(--space-3xl);
    gap: var(--space-lg);
  }

  /* =====================
     卡片调整
     ===================== */
  .service-card {
    padding: var(--space-xl);
  }

  .case-card {
    border-radius: var(--radius-md);
  }

  .case-image {
    height: 160px;
  }

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

  .case-stats {
    flex-wrap: wrap;
  }

  .blog-card-image {
    height: 150px;
  }

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

  /* =====================
     文章详情/博客
     ===================== */
  .article-main {
    padding: var(--space-xl) var(--space-lg);
    border-radius: var(--radius-md);
  }

  .article-header h1 {
    font-size: 1.3rem;
  }

  .article-meta {
    gap: var(--space-md);
    font-size: 0.82rem;
    flex-wrap: wrap;
  }

  .article-content h2 {
    font-size: 1.15rem;
  }

  .article-content h3 {
    font-size: 1rem;
  }

  /* 代码块横向滚动 */
  .article-content pre {
    padding: var(--space-md);
    font-size: 0.82rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  /* 表格横向滚动 */
  .article-content table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: nowrap;
  }

  .article-content th,
  .article-content td {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.88rem;
  }

  .article-content ul,
  .article-content ol {
    padding-left: var(--space-lg);
  }

  /* =====================
     联系页面
     ===================== */
  .contact-form {
    padding: var(--space-xl);
    border-radius: var(--radius-md);
  }

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

  .form-control {
    padding: 14px 16px;
    font-size: 1rem;
    min-height: 48px;
  }

  .form-group label {
    font-size: 0.92rem;
  }

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

  /* 联系信息卡片竖排 */
  .contact-info-card {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-sm);
    padding: var(--space-lg);
  }

  .contact-map {
    min-height: 200px;
  }

  /* =====================
     关于页面
     ===================== */
  .about-visual {
    padding: var(--space-xl);
  }

  .about-visual-card {
    min-height: auto;
    padding: var(--space-xl);
  }

  .company-name {
    font-size: 1.3rem;
  }

  /* 时间轴 */
  .timeline {
    padding-left: var(--space-lg);
  }

  .timeline::before {
    left: 4px;
  }

  .timeline-item,
  .timeline-item:nth-child(even) {
    width: 100%;
    margin-left: 0;
    padding: 0 0 var(--space-2xl) var(--space-xl);
  }

  .timeline-item::before,
  .timeline-item:nth-child(even)::before {
    left: -5px;
    right: auto;
    width: 14px;
    height: 14px;
  }

  /* =====================
     FAQ
     ===================== */
  .faq-question {
    padding: var(--space-md) var(--space-lg);
    font-size: 0.95rem;
    min-height: 48px;
  }

  .faq-answer-inner {
    padding: 0 var(--space-lg) var(--space-lg);
    font-size: 0.9rem;
  }

  /* =====================
     CTA 区域
     ===================== */
  .cta-section {
    padding: var(--space-2xl);
    border-radius: var(--radius-lg);
    margin: 0 var(--space-md);
  }

  .cta-section h2 {
    font-size: 1.4rem;
  }

  /* =====================
     文章筛选
     ===================== */
  .blog-filters {
    gap: var(--space-xs);
    margin-bottom: var(--space-2xl);
    padding: 0 var(--space-sm);
  }

  .blog-filter {
    padding: 8px 16px;
    font-size: 0.82rem;
    min-height: 38px;
  }

  /* =====================
     面包屑
     ===================== */
  .breadcrumb {
    flex-wrap: wrap;
    font-size: 0.8rem;
  }

  /* =====================
     页面内页Hero
     ===================== */
  .page-hero {
    padding: calc(var(--header-height) + var(--space-2xl)) 0 var(--space-xl);
  }

  .page-hero h1 {
    font-size: clamp(1.3rem, 5vw, 1.7rem);
  }

  .page-hero p {
    font-size: 0.92rem;
  }

  /* =====================
     按钮
     ===================== */
  .btn {
    min-height: 44px;
    padding: 12px 24px;
    font-size: 0.92rem;
  }

  .btn-lg {
    padding: 14px 28px;
    font-size: 0.98rem;
  }

  /* =====================
     Footer
     ===================== */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
    text-align: center;
  }

  .site-footer .logo {
    justify-content: center;
  }

  .footer-social {
    justify-content: center;
  }

  .footer-contact-item {
    justify-content: center;
  }

  .footer-col h4 {
    margin-bottom: var(--space-md);
  }

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

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

  /* =====================
     工具类
     ===================== */
  .section-title {
    font-size: 1.4rem;
  }

  .section-subtitle {
    font-size: 0.92rem;
    margin-bottom: var(--space-2xl);
    padding: 0 var(--space-sm);
  }

  .badge {
    font-size: 0.75rem;
    padding: 4px 12px;
  }
}

/* ---------- 480px 大屏手机 ---------- */
@media (max-width: 480px) {
  :root {
    --header-height: 56px;
  }

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

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

  /* Hero */
  .hero {
    padding: calc(var(--header-height) + var(--space-xl)) 0 var(--space-xl);
  }

  .hero-content h1 {
    font-size: 1.3rem;
  }

  .hero-content p {
    font-size: 0.88rem;
  }

  /* 网格 */
  .services-grid,
  .cases-grid,
  .blog-grid {
    gap: var(--space-md);
  }

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

  .stat-card {
    padding: var(--space-md);
  }

  .stat-number {
    font-size: 2rem;
  }

  .stat-label {
    font-size: 0.82rem;
  }

  /* 卡片 */
  .service-card {
    padding: var(--space-lg);
  }

  .service-icon {
    width: 48px;
    height: 48px;
    font-size: 1.3rem;
    margin-bottom: var(--space-md);
  }

  .service-card h3 {
    font-size: 1.05rem;
  }

  .service-card p {
    font-size: 0.88rem;
  }

  .service-features li {
    font-size: 0.84rem;
  }

  .case-image {
    height: 140px;
  }

  .case-body h3 {
    font-size: 1rem;
  }

  .case-stats {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .case-stat strong {
    font-size: 1.1rem;
  }

  .blog-card-image {
    height: 140px;
  }

  .blog-card h3 {
    font-size: 0.98rem;
  }

  /* 优势 */
  .advantage-item {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .advantage-number {
    font-size: 2rem;
  }

  /* 文章详情 */
  .article-main {
    padding: var(--space-lg);
  }

  .article-header h1 {
    font-size: 1.15rem;
  }

  .article-header {
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-lg);
  }

  .article-content {
    font-size: 0.92rem;
  }

  .article-content h2 {
    font-size: 1.05rem;
    margin: var(--space-xl) 0 var(--space-sm);
  }

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

  /* 页面Hero */
  .page-hero {
    padding: calc(var(--header-height) + var(--space-xl)) 0 var(--space-lg);
  }

  .page-hero h1 {
    font-size: 1.2rem;
  }

  .page-hero p {
    font-size: 0.85rem;
  }

  /* CTA */
  .cta-section {
    padding: var(--space-xl);
    margin: 0 var(--space-sm);
  }

  .cta-section h2 {
    font-size: 1.2rem;
  }

  /* 联系表单 */
  .contact-form {
    padding: var(--space-lg);
  }

  .contact-info-card {
    padding: var(--space-md);
  }

  /* 服务流程 */
  .service-process-step {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-sm);
  }

  .process-step-num {
    width: 32px;
    height: 32px;
    font-size: 0.8rem;
  }

  /* 关于页公司信息 */
  .company-name {
    font-size: 1.15rem;
  }

  .about-info-item {
    flex-direction: column;
    gap: var(--space-xs);
  }

  /* FAQ */
  .faq-question {
    padding: var(--space-md);
    font-size: 0.9rem;
  }

  .faq-answer-inner {
    padding: 0 var(--space-md) var(--space-md);
    font-size: 0.86rem;
  }

  /* 值卡片 */
  .value-card {
    padding: var(--space-lg);
  }

  .value-icon {
    width: 44px;
    height: 44px;
    font-size: 1.2rem;
    margin-bottom: var(--space-md);
  }

  /* Logo */
  .logo-img {
    width: 30px;
    height: 30px;
  }

  .logo {
    font-size: 0.9rem;
  }

  .site-footer .logo-img {
    width: 36px;
    height: 36px;
  }

  /* 按钮 */
  .btn {
    min-height: 44px;
    padding: 11px 20px;
    font-size: 0.88rem;
  }

  .btn-lg {
    padding: 13px 24px;
    font-size: 0.95rem;
  }

  /* header CTA在480以下手机已经隐藏 */
  .header-cta {
    gap: var(--space-sm);
  }

  /* 幻灯片/遮罩 */
  .main-nav {
    padding: var(--space-lg);
  }

  .main-nav a {
    padding: 12px 0;
    font-size: 1rem;
  }
}

/* ---------- 360px 小屏手机 ---------- */
@media (max-width: 360px) {
  .container {
    padding: 0 var(--space-sm);
  }

  .hero-content h1 {
    font-size: 1.15rem;
  }

  .hero-content p {
    font-size: 0.84rem;
  }

  .hero-actions .btn {
    padding: 12px 16px;
    font-size: 0.88rem;
  }

  .section-title {
    font-size: 1.25rem;
  }

  .contact-form {
    padding: var(--space-md);
  }

  .article-main {
    padding: var(--space-md);
  }

  .service-card {
    padding: var(--space-md);
  }

  .blog-filter {
    padding: 6px 12px;
    font-size: 0.76rem;
  }

  .blog-filters {
    gap: 6px;
  }

  .footer-grid {
    gap: var(--space-xl);
  }

  .footer-col ul li a {
    font-size: 0.88rem;
  }
}

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

.fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
}

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

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

/* 无障碍焦点样式 */
*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* 跳转链接 */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: #fff;
  padding: 8px 16px;
  z-index: 1001;
  border-radius: 0 0 var(--radius-md) 0;
}

.skip-link:focus {
  top: 0;
  color: #fff;
}