/* 基础重置与全局变量 */
:root {
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --success-gradient: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
  --bg-gradient: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  --card-bg: rgba(255, 255, 255, 0.08);
  --card-border: rgba(255, 255, 255, 0.12);
  --text-primary: #e0e0e0;
  --text-secondary: #b0b0b0;
  --text-muted: #888;
  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.15);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --transition: 0.3s ease;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --max-width: 1200px;
  --header-height: 70px;
}

/* 亮色模式变量 */
.light-mode {
  --bg-gradient: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  --card-bg: rgba(255, 255, 255, 0.7);
  --card-border: rgba(0, 0, 0, 0.1);
  --text-primary: #1a1a2e;
  --text-secondary: #444;
  --text-muted: #666;
  --glass-bg: rgba(255, 255, 255, 0.3);
  --glass-border: rgba(0, 0, 0, 0.08);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg-gradient);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: background 0.5s ease, color 0.3s ease;
  overflow-x: hidden;
}

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

a:hover {
  color: #667eea;
}

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

button {
  cursor: pointer;
  border: none;
  background: none;
  font: inherit;
  color: inherit;
  outline: none;
}

input {
  font: inherit;
  color: inherit;
  border: none;
  outline: none;
  background: transparent;
}

ul {
  list-style: none;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

section {
  padding: 80px 0;
  position: relative;
}

h2 {
  font-size: 2.2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 40px;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 1px;
}

h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 12px;
}

/* 滚动动画基础 */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* 渐变Banner通用 */
.gradient-banner {
  background: var(--primary-gradient);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  position: relative;
  overflow: hidden;
}

.gradient-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 40%, rgba(255,255,255,0.1) 0%, transparent 60%);
  animation: shimmer 6s infinite linear;
}

@keyframes shimmer {
  0% { transform: translate(0, 0); }
  50% { transform: translate(10%, 10%); }
  100% { transform: translate(0, 0); }
}

/* 圆角卡片通用 */
.card {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 30px;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

/* 毛玻璃效果 */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
}

/* 按钮样式 */
.btn-primary {
  display: inline-block;
  padding: 14px 36px;
  background: var(--primary-gradient);
  color: #fff;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 30px rgba(102, 126, 234, 0.6);
  color: #fff;
}

/* ========== HEADER / NAV ========== */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(26, 26, 46, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: background 0.3s ease;
}

.light-mode header {
  background: rgba(245, 247, 250, 0.85);
  border-bottom: 1px solid rgba(0,0,0,0.06);
}

nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  flex-shrink: 0;
}

.logo svg {
  height: 40px;
  width: auto;
}

.nav-links {
  display: flex;
  gap: 28px;
  align-items: center;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.nav-links a:hover {
  color: #667eea;
  border-bottom-color: #667eea;
}

.nav-actions {
  display: flex;
  gap: 12px;
  align-items: center;
}

.nav-actions button {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--card-bg);
  backdrop-filter: blur(8px);
  border: 1px solid var(--card-border);
  transition: background var(--transition), transform var(--transition);
}

.nav-actions button:hover {
  background: rgba(255,255,255,0.15);
  transform: scale(1.1);
}

.mobile-menu-toggle {
  display: none;
}

.search-box {
  position: absolute;
  top: var(--header-height);
  left: 0;
  width: 100%;
  background: rgba(26, 26, 46, 0.95);
  backdrop-filter: blur(20px);
  padding: 16px 20px;
  display: none;
  gap: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.search-box.active {
  display: flex;
}

.search-box input {
  flex: 1;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  font-size: 0.95rem;
}

.search-box input::placeholder {
  color: var(--text-muted);
}

.search-submit {
  padding: 12px 24px;
  background: var(--primary-gradient);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: opacity var(--transition);
}

.search-submit:hover {
  opacity: 0.85;
}

/* ========== HERO / SLIDER ========== */
.hero {
  position: relative;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-top: var(--header-height);
}

.banner-slider {
  position: relative;
}

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.8s ease;
  pointer-events: none;
}

.slide.active {
  opacity: 1;
  position: relative;
  pointer-events: auto;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  padding: 40px 20px;
}

.hero-content h1 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #fff 0%, #e0e0e0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.light-mode .hero-content h1 {
  background: linear-gradient(135deg, #1a1a2e 0%, #333 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 30px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

.slider-controls {
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  transform: translateY(-50%);
  display: flex;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 2;
  pointer-events: none;
}

.slider-controls button {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), transform var(--transition);
  pointer-events: auto;
}

.slider-controls button:hover {
  background: rgba(255,255,255,0.2);
  transform: scale(1.1);
}

.slider-dots {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 2;
}

.slider-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,0.3);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}

.slider-dots span.active {
  background: #667eea;
  transform: scale(1.2);
}

/* ========== ABOUT ========== */
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.intro-text p {
  margin-bottom: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.intro-image svg {
  border-radius: var(--radius-md);
  width: 100%;
  height: auto;
}

/* ========== COMPANY PROFILE ========== */
.profile-content p {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 40px;
  color: var(--text-secondary);
  line-height: 1.8;
}

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

.stat-item {
  text-align: center;
  padding: 24px;
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  transition: transform var(--transition);
}

.stat-item:hover {
  transform: translateY(-4px);
}

.stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* ========== BRAND STORY ========== */
.story-content p {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 40px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.story-timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.timeline-item {
  padding: 24px;
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  position: relative;
  transition: transform var(--transition);
}

.timeline-item:hover {
  transform: translateY(-4px);
}

.timeline-item h3 {
  font-size: 1.1rem;
  color: #667eea;
  margin-bottom: 8px;
}

.timeline-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 0;
}

/* ========== CORPORATE CULTURE ========== */
.culture-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.culture-item {
  text-align: center;
  padding: 32px 20px;
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  transition: transform var(--transition);
}

.culture-item:hover {
  transform: translateY(-6px);
}

.culture-item svg {
  margin: 0 auto 16px;
}

.culture-item h3 {
  margin-bottom: 8px;
}

.culture-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ========== TEAM ========== */
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.team-member {
  text-align: center;
  padding: 32px 20px;
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  transition: transform var(--transition);
}

.team-member:hover {
  transform: translateY(-6px);
}

.team-member svg {
  margin: 0 auto 16px;
  border-radius: 50%;
}

.team-member h3 {
  margin-bottom: 4px;
}

.team-member p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

/* ========== PRODUCTS ========== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.product-card {
  text-align: center;
  padding: 24px;
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  transition: transform var(--transition);
}

.product-card:hover {
  transform: translateY(-6px);
}

.product-card svg {
  margin: 0 auto 16px;
  border-radius: var(--radius-sm);
}

.product-card h3 {
  margin-bottom: 8px;
}

.product-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ========== ADVANTAGES ========== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.advantage-item {
  text-align: center;
  padding: 32px 20px;
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  transition: transform var(--transition);
}

.advantage-item:hover {
  transform: translateY(-6px);
}

.advantage-item svg {
  margin: 0 auto 16px;
  border-radius: var(--radius-sm);
}

.advantage-item h3 {
  margin-bottom: 8px;
}

.advantage-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ========== SOLUTIONS ========== */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.solution-item {
  padding: 32px 24px;
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  transition: transform var(--transition);
}

.solution-item:hover {
  transform: translateY(-6px);
}

.solution-item h3 {
  margin-bottom: 12px;
  color: #667eea;
}

.solution-item p {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ========== INDUSTRIES ========== */
.industries-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.industry-item {
  text-align: center;
  padding: 24px;
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  transition: transform var(--transition);
}

.industry-item:hover {
  transform: translateY(-6px);
}

.industry-item svg {
  margin: 0 auto 12px;
}

.industry-item p {
  font-weight: 500;
  color: var(--text-secondary);
}

/* ========== STATISTICS ========== */
.statistics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.statistics-grid .stat-item {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  padding: 32px 20px;
  text-align: center;
  transition: transform var(--transition);
}

.statistics-grid .stat-item:hover {
  transform: translateY(-4px);
}

/* ========== CASES ========== */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.case-item {
  padding: 24px;
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  transition: transform var(--transition);
}

.case-item:hover {
  transform: translateY(-6px);
}

.case-item svg {
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  width: 100%;
}

.case-item h3 {
  margin-bottom: 8px;
}

.case-item p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ========== PARTNERS ========== */
.partners-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
}

.partner-item {
  flex: 0 0 auto;
  transition: transform var(--transition);
}

.partner-item:hover {
  transform: scale(1.05);
}

.partner-item svg {
  border-radius: var(--radius-sm);
}

/* ========== TESTIMONIALS ========== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-item {
  text-align: center;
  padding: 32px 24px;
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  transition: transform var(--transition);
}

.testimonial-item:hover {
  transform: translateY(-6px);
}

.testimonial-item svg {
  margin: 0 auto 16px;
  border-radius: 50%;
}

.testimonial-item blockquote {
  font-style: italic;
  color: var(--text-secondary);
  margin-bottom: 12px;
  line-height: 1.7;
  quotes: "“" "”" "‘" "’";
}

.testimonial-item blockquote::before {
  content: "“";
  font-size: 1.5rem;
  color: #667eea;
}

.testimonial-item blockquote::after {
  content: "”";
  font-size: 1.5rem;
  color: #667eea;
}

.testimonial-item cite {
  font-style: normal;
  font-weight: 500;
  color: #667eea;
}

/* ========== NEWS ========== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.news-item {
  padding: 24px;
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  transition: transform var(--transition);
}

.news-item:hover {
  transform: translateY(-6px);
}

.news-item svg {
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  width: 100%;
}

.news-item h3 {
  margin-bottom: 8px;
}

.news-item p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 12px;
  line-height: 1.7;
}

.news-item a {
  color: #667eea;
  font-weight: 500;
  font-size: 0.9rem;
  transition: color var(--transition);
}

.news-item a:hover {
  color: #764ba2;
}

/* ========== LATEST & RELATED ARTICLES ========== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-item {
  padding: 24px;
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  transition: transform var(--transition);
}

.article-item:hover {
  transform: translateY(-6px);
}

.article-item h3 {
  margin-bottom: 8px;
}

.article-item p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 8px;
}

.article-item time {
  font-size: 0.8rem;
  color: var(--text-muted);
}

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

.faq-item {
  margin-bottom: 12px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
}

.faq-question {
  width: 100%;
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  background: transparent;
  transition: background var(--transition);
}

.faq-question:hover {
  background: rgba(255,255,255,0.05);
}

.faq-icon {
  transition: transform var(--transition);
  display: flex;
  align-items: center;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 24px;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 24px 18px;
}

.faq-answer p {
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 0.95rem;
}

/* ========== HOWTO ========== */
.howto-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.step {
  text-align: center;
  padding: 32px 20px;
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  position: relative;
  transition: transform var(--transition);
}

.step:hover {
  transform: translateY(-6px);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary-gradient);
  color: #fff;
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.step h3 {
  margin-bottom: 8px;
}

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

/* ========== CONTACT ========== */
.contact-info {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.contact-item {
  text-align: center;
  padding: 32px 20px;
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  transition: transform var(--transition);
}

.contact-item:hover {
  transform: translateY(-6px);
}

.contact-item h3 {
  margin-bottom: 8px;
  color: #667eea;
}

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

/* ========== SIDEBAR ========== */
.sidebar {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 20px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  margin-top: 40px;
  margin-bottom: 40px;
}

.breadcrumb {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.breadcrumb a {
  color: #667eea;
}

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

.search-entry {
  display: flex;
  gap: 8px;
}

.search-entry input {
  flex: 1;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
}

.search-entry button {
  padding: 10px 20px;
  background: var(--primary-gradient);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: opacity var(--transition);
}

.search-entry button:hover {
  opacity: 0.85;
}

.latest-updates h3 {
  font-size: 1rem;
  margin-bottom: 12px;
}

.latest-updates ul li {
  margin-bottom: 6px;
}

.latest-updates ul li a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color var(--transition);
}

.latest-updates ul li a:hover {
  color: #667eea;
}

.prev-next {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.prev-next a {
  font-size: 0.9rem;
  color: #667eea;
}

.prev-next a:hover {
  text-decoration: underline;
}

/* ========== FOOTER ========== */
footer {
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(20px);
  border-top: 1px solid var(--card-border);
  padding: 60px 20px 30px;
}

.light-mode footer {
  background: rgba(255, 255, 255, 0.3);
}

.footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  margin-bottom: 40px;
}

.footer-content h3 {
  font-size: 1rem;
  margin-bottom: 16px;
  color: #667eea;
}

.footer-content ul li {
  margin-bottom: 8px;
}

.footer-content ul li a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color var(--transition);
}

.footer-content ul li a:hover {
  color: #667eea;
}

.footer-content p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 6px;
}

.footer-legal p {
  margin-bottom: 4px;
}

.footer-legal a {
  color: #667eea;
  font-size: 0.9rem;
}

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

.footer-bottom {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid var(--card-border);
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 6px;
  line-height: 1.6;
}

.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary-gradient);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
  transition: transform var(--transition), opacity var(--transition);
  opacity: 0;
  pointer-events: none;
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.back-to-top:hover {
  transform: scale(1.1);
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .intro-grid,
  .profile-stats,
  .culture-grid,
  .team-grid,
  .products-grid,
  .advantages-grid,
  .solutions-grid,
  .industries-grid,
  .statistics-grid,
  .cases-grid,
  .testimonials-grid,
  .news-grid,
  .articles-grid,
  .howto-steps,
  .contact-info,
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

  section {
    padding: 60px 0;
  }

  h2 {
    font-size: 1.8rem;
    margin-bottom: 30px;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: rgba(26, 26, 46, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 20px;
    gap: 16px;
    border-bottom: 1px solid var(--card-border);
  }

  .nav-links.active {
    display: flex;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .hero-content h1 {
    font-size: 2rem;
  }

  .hero-content p {
    font-size: 1rem;
  }

  .intro-grid,
  .profile-stats,
  .culture-grid,
  .team-grid,
  .products-grid,
  .advantages-grid,
  .solutions-grid,
  .industries-grid,
  .statistics-grid,
  .cases-grid,
  .testimonials-grid,
  .news-grid,
  .articles-grid,
  .howto-steps,
  .contact-info,
  .footer-content,
  .story-timeline {
    grid-template-columns: 1fr;
  }

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

  .slider-controls button {
    width: 40px;
    height: 40px;
  }

  .footer-content {
    gap: 24px;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
  }
}

@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 1.6rem;
  }

  .btn-primary {
    padding: 12px 28px;
    font-size: 0.9rem;
  }

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

  .card, .culture-item, .team-member, .product-card, .advantage-item, .solution-item, .industry-item, .case-item, .testimonial-item, .news-item, .article-item, .step, .contact-item {
    padding: 20px;
  }
}