/* 魅影TV - 完整样式表 */

/* ===== CSS变量 ===== */
:root {
  --primary: #e94560;
  --primary-dark: #c2314a;
  --secondary: #0f3460;
  --secondary-light: #16213e;
  --bg-dark: #1a1a2e;
  --bg-light: #f8f9fa;
  --text-dark: #2c3e50;
  --text-light: #ecf0f1;
  --text-muted: #95a5a6;
  --card-bg: rgba(255, 255, 255, 0.85);
  --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
  --glass-bg: rgba(255, 255, 255, 0.15);
  --glass-border: rgba(255, 255, 255, 0.25);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

/* ===== 暗色模式 ===== */
body.dark-mode {
  --bg-light: #0f0f1a;
  --text-dark: #e0e0e0;
  --card-bg: rgba(30, 30, 50, 0.85);
  --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --glass-bg: rgba(0, 0, 0, 0.25);
  --glass-border: rgba(255, 255, 255, 0.1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  background: var(--bg-light);
  color: var(--text-dark);
  line-height: 1.6;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
}

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

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

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

ul, ol {
  list-style: none;
}

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

/* ===== 滚动条 ===== */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary-dark);
}

/* ===== 头部导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(26, 26, 46, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition);
}
body.dark-mode .site-header {
  background: rgba(10, 10, 20, 0.95);
}
.site-header.sticky {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 12px 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: 1px;
}
.logo svg {
  flex-shrink: 0;
}
.logo-text {
  background: linear-gradient(135deg, #e94560, #ff6b81);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  gap: 8px;
  align-items: center;
}
.nav-link {
  color: rgba(255, 255, 255, 0.8);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  transition: all var(--transition);
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition);
  border-radius: 2px;
}
.nav-link:hover {
  color: #fff;
  background: rgba(233, 69, 96, 0.15);
}
.nav-link:hover::after {
  width: 60%;
}

.nav-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}
.nav-actions button {
  padding: 8px;
  border-radius: 50%;
  color: rgba(255, 255, 255, 0.8);
  transition: all var(--transition);
}
.nav-actions button:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.menu-toggle {
  display: none;
}

.search-bar {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(10px);
}
.search-bar.active {
  max-height: 80px;
  padding: 12px 20px;
}
.search-bar form {
  display: flex;
  max-width: 600px;
  margin: 0 auto;
  gap: 8px;
}
.search-bar input {
  flex: 1;
  padding: 12px 20px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  font-size: 1rem;
  outline: none;
  transition: border var(--transition);
}
.search-bar input:focus {
  border-color: var(--primary);
}
.search-bar input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}
.search-bar button {
  padding: 12px 24px;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius-lg);
  font-weight: 600;
  transition: background var(--transition);
}
.search-bar button:hover {
  background: var(--primary-dark);
}

/* ===== Banner 轮播 ===== */
.banner {
  position: relative;
  height: 600px;
  min-height: 60vh;
  overflow: hidden;
  background: var(--bg-dark);
}
.banner-slider {
  position: relative;
  height: 100%;
  width: 100%;
}
.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.8s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
}
.slide.active {
  opacity: 1;
}
.slide:nth-child(2) {
  background: linear-gradient(135deg, #0f3460 0%, #1a1a2e 50%, #16213e 100%);
}
.slide:nth-child(3) {
  background: linear-gradient(135deg, #16213e 0%, #0f3460 50%, #1a1a2e 100%);
}
.slide-content {
  text-align: center;
  padding: 40px 20px;
  max-width: 700px;
  color: #fff;
  animation: slideUp 0.8s ease forwards;
}
.slide-content h1, .slide-content h2 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  margin-bottom: 20px;
  line-height: 1.2;
  background: linear-gradient(135deg, #fff, #e94560);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.slide-content p {
  font-size: 1.15rem;
  opacity: 0.9;
  margin-bottom: 30px;
  line-height: 1.7;
}
.btn-primary {
  display: inline-block;
  padding: 14px 36px;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius-lg);
  font-weight: 700;
  font-size: 1.05rem;
  transition: all var(--transition);
  box-shadow: 0 4px 15px rgba(233, 69, 96, 0.4);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(233, 69, 96, 0.5);
  color: #fff;
}

.banner-controls {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  transform: translateY(-50%);
  display: flex;
  justify-content: space-between;
  padding: 0 20px;
  pointer-events: none;
}
.banner-controls button {
  pointer-events: auto;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  color: #fff;
  font-size: 1.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  border: 1px solid rgba(255, 255, 255, 0.2);
}
.banner-controls button:hover {
  background: rgba(233, 69, 96, 0.6);
  transform: scale(1.1);
}

.banner-dots {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
}
.banner-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transition: all var(--transition);
  border: 2px solid transparent;
}
.banner-dot.active {
  background: var(--primary);
  border-color: rgba(255, 255, 255, 0.5);
  transform: scale(1.2);
}
.banner-dot:hover {
  background: var(--primary);
}

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

/* ===== 面包屑 ===== */
.breadcrumb {
  padding: 16px 0;
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}
.breadcrumb ol {
  display: flex;
  gap: 8px;
  align-items: center;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}
.breadcrumb li {
  font-size: 0.9rem;
  color: var(--text-muted);
}
.breadcrumb li + li::before {
  content: '/';
  margin-right: 8px;
  color: var(--text-muted);
}
.breadcrumb a {
  color: var(--primary);
}
.breadcrumb a:hover {
  text-decoration: underline;
}

/* ===== 通用Section ===== */
.section {
  padding: 80px 0;
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.section.visible {
  animation: fadeInUp 0.6s ease forwards;
}
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  text-align: center;
  margin-bottom: 50px;
  position: relative;
  color: var(--text-dark);
}
.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: linear-gradient(135deg, var(--primary), #ff6b81);
  margin: 16px auto 0;
  border-radius: 4px;
}

/* ===== 关于 ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 40px;
  align-items: start;
}
.about-text h3 {
  font-size: 1.4rem;
  color: var(--primary);
  margin: 24px 0 12px;
}
.about-text h3:first-child {
  margin-top: 0;
}
.about-text p {
  line-height: 1.8;
  color: var(--text-dark);
  opacity: 0.85;
}
.about-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.info-card {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--card-shadow);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: transform var(--transition), box-shadow var(--transition);
}
.info-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}
.info-card h4 {
  font-size: 1.2rem;
  color: var(--primary);
  margin-bottom: 16px;
}
.info-card ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.info-card li {
  font-size: 0.95rem;
  line-height: 1.6;
}
.info-card li strong {
  color: var(--text-dark);
  min-width: 120px;
  display: inline-block;
}

/* ===== 产品 ===== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}
.product-card {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--card-shadow);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition);
  cursor: default;
}
.product-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.15);
  border-color: var(--primary);
}
.product-card svg {
  margin: 0 auto 20px;
}
.product-card h3 {
  font-size: 1.3rem;
  margin-bottom: 12px;
  color: var(--text-dark);
}
.product-card p {
  font-size: 0.95rem;
  opacity: 0.8;
  line-height: 1.7;
}

/* ===== 优势 ===== */
.advantages {
  background: linear-gradient(135deg, var(--bg-dark), var(--secondary));
  color: #fff;
}
.advantages .section-title {
  color: #fff;
}
.advantages .section-title::after {
  background: linear-gradient(135deg, #fff, var(--primary));
}
.advantage-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.advantage-item {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: all var(--transition);
}
.advantage-item:hover {
  background: rgba(233, 69, 96, 0.2);
  transform: translateY(-4px);
}
.advantage-item h3 {
  font-size: 1.2rem;
  color: var(--primary);
  margin-bottom: 12px;
}
.advantage-item p {
  opacity: 0.85;
  line-height: 1.7;
}

/* ===== 解决方案 ===== */
.solution-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}
.solution-card {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  box-shadow: var(--card-shadow);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.solution-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(135deg, var(--primary), #ff6b81);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.solution-card:hover::before {
  transform: scaleX(1);
}
.solution-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}
.solution-card h3 {
  font-size: 1.25rem;
  color: var(--primary);
  margin-bottom: 14px;
}
.solution-card p {
  line-height: 1.7;
  opacity: 0.85;
}

/* ===== 行业应用 ===== */
.industry {
  background: linear-gradient(135deg, var(--secondary-light), var(--bg-dark));
  color: #fff;
  text-align: center;
}
.industry .section-title {
  color: #fff;
}
.industry p {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.1rem;
  line-height: 1.8;
  opacity: 0.9;
}

/* ===== 案例 ===== */
.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}
.case-card {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--card-shadow);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition);
}
.case-card:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
  border-color: var(--primary);
}
.case-card h3 {
  font-size: 1.1rem;
  color: var(--primary);
  margin-bottom: 12px;
}
.case-card p {
  line-height: 1.7;
  opacity: 0.85;
}

/* ===== 客户评价 ===== */
.testimonials {
  background: linear-gradient(135deg, var(--bg-dark), var(--secondary));
  color: #fff;
}
.testimonials .section-title {
  color: #fff;
}
.testimonial-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 800px;
  margin: 0 auto;
}
blockquote {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  font-style: italic;
  position: relative;
  transition: transform var(--transition);
}
blockquote:hover {
  transform: translateX(8px);
}
blockquote::before {
  content: '"';
  font-size: 3rem;
  color: var(--primary);
  position: absolute;
  top: -8px;
  left: 16px;
  opacity: 0.5;
}
blockquote p {
  line-height: 1.7;
  opacity: 0.9;
}

/* ===== 新闻 ===== */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
}
.article-card {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--card-shadow);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.article-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}
.article-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
  flex: 1;
}
.article-card h3 a {
  color: var(--text-dark);
  transition: color var(--transition);
}
.article-card h3 a:hover {
  color: var(--primary);
}
.article-card time {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.article-card p {
  font-size: 0.95rem;
  line-height: 1.7;
  opacity: 0.8;
  margin-bottom: 16px;
}
.read-more {
  color: var(--primary);
  font-weight: 600;
  font-size: 0.95rem;
  align-self: flex-start;
  transition: all var(--transition);
}
.read-more:hover {
  color: var(--primary-dark);
  letter-spacing: 1px;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-md);
  box-shadow: var(--card-shadow);
  border: 1px solid rgba(255, 255, 255, 0.1);
  overflow: hidden;
  transition: all var(--transition);
}
.faq-item:hover {
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}
.faq-item summary {
  padding: 20px 24px;
  font-weight: 600;
  font-size: 1.05rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background var(--transition);
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--primary);
  transition: transform var(--transition);
}
.faq-item[open] summary::after {
  transform: rotate(45deg);
}
.faq-item summary:hover {
  background: rgba(233, 69, 96, 0.05);
}
.faq-item p {
  padding: 0 24px 20px;
  line-height: 1.7;
  opacity: 0.85;
}

/* ===== HowTo ===== */
.howto-content {
  max-width: 800px;
  margin: 0 auto;
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-md);
  padding: 40px;
  box-shadow: var(--card-shadow);
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.howto-content h3 {
  color: var(--primary);
  margin: 24px 0 12px;
  font-size: 1.2rem;
}
.howto-content h3:first-child {
  margin-top: 0;
}
.howto-content p {
  line-height: 1.8;
  opacity: 0.85;
}
.howto-content ol {
  list-style: decimal;
  padding-left: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.howto-content ol li {
  line-height: 1.7;
  opacity: 0.85;
}
.howto-content ol li strong {
  color: var(--primary);
}

/* ===== 联系我们 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.contact-info p {
  font-size: 1rem;
  line-height: 1.6;
}
.contact-info p strong {
  color: var(--primary);
  min-width: 100px;
  display: inline-block;
}
.contact-map svg {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--card-shadow);
}

/* ===== 网站地图 ===== */
.sitemap-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  max-width: 700px;
  margin: 0 auto;
}
.sitemap-list li a {
  display: block;
  padding: 10px 20px;
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  box-shadow: var(--card-shadow);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-weight: 500;
  transition: all var(--transition);
}
.sitemap-list li a:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}

/* ===== 友情链接 ===== */
.friend-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}
.friend-links li a {
  color: var(--text-muted);
  font-size: 0.95rem;
  transition: color var(--transition);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
}
.friend-links li a:hover {
  color: var(--primary);
  background: rgba(233, 69, 96, 0.05);
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 40px 0;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}
.footer-content {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-content p {
  font-size: 0.9rem;
  line-height: 1.6;
}
.footer-content a {
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition);
}
.footer-content a:hover {
  color: var(--primary);
}

/* ===== 返回顶部 ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(233, 69, 96, 0.4);
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition);
  z-index: 999;
  border: none;
}
.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}
.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-4px);
  box-shadow: 0 6px 25px rgba(233, 69, 96, 0.5);
}

/* ===== 响应式设计 ===== */

/* 平板 */
@media (max-width: 992px) {
  .about-grid {
    grid-template-columns: 1fr;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .banner {
    height: 450px;
  }
  .slide-content {
    padding: 30px 20px;
  }
  .section {
    padding: 60px 0;
  }
}

/* 手机 */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: rgba(26, 26, 46, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 20px;
    gap: 4px;
    transform: translateY(-120%);
    transition: transform 0.4s ease;
    z-index: 999;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  .nav-menu.open {
    transform: translateY(0);
  }
  .nav-link {
    width: 100%;
    text-align: center;
    padding: 14px;
    font-size: 1.1rem;
  }
  .menu-toggle {
    display: block;
  }
  .banner {
    height: 380px;
  }
  .slide-content h1, .slide-content h2 {
    font-size: 1.8rem;
  }
  .slide-content p {
    font-size: 1rem;
  }
  .btn-primary {
    padding: 12px 28px;
    font-size: 0.95rem;
  }
  .section-title {
    font-size: 1.6rem;
    margin-bottom: 36px;
  }
  .product-grid, .solution-grid, .case-grid, .article-grid {
    grid-template-columns: 1fr;
  }
  .advantage-list {
    grid-template-columns: 1fr;
  }
  .howto-content {
    padding: 24px;
  }
  .banner-controls button {
    width: 40px;
    height: 40px;
    font-size: 1.4rem;
  }
  .banner-dots {
    bottom: 20px;
  }
  .back-to-top {
    width: 44px;
    height: 44px;
    bottom: 20px;
    right: 20px;
  }
  .search-bar.active {
    padding: 8px 16px;
  }
  .search-bar input {
    padding: 10px 16px;
    font-size: 0.9rem;
  }
  .search-bar button {
    padding: 10px 18px;
    font-size: 0.9rem;
  }
}

/* 小手机 */
@media (max-width: 480px) {
  .banner {
    height: 320px;
  }
  .slide-content h1, .slide-content h2 {
    font-size: 1.5rem;
  }
  .slide-content p {
    font-size: 0.9rem;
  }
  .section {
    padding: 40px 0;
  }
  .container {
    padding: 0 16px;
  }
  .info-card, .product-card, .solution-card, .case-card, .article-card {
    padding: 20px;
  }
  .faq-item summary {
    padding: 16px 18px;
    font-size: 0.95rem;
  }
  .faq-item p {
    padding: 0 18px 16px;
  }
}

/* ===== 滚动动画初始状态 ===== */
.section, .product-card, .article-card, .case-card, .solution-card, .advantage-item {
  opacity: 0;
  transform: translateY(30px);
}
.section.visible, .product-card.visible, .article-card.visible, .case-card.visible, .solution-card.visible, .advantage-item.visible {
  animation: fadeInUp 0.6s ease forwards;
}

/* ===== 暗色模式适配 ===== */
body.dark-mode .breadcrumb {
  background: rgba(30, 30, 50, 0.85);
}
body.dark-mode .breadcrumb li {
  color: rgba(255, 255, 255, 0.6);
}
body.dark-mode .breadcrumb a {
  color: #ff6b81;
}
body.dark-mode .sitemap-list li a {
  background: rgba(30, 30, 50, 0.85);
  border-color: rgba(255, 255, 255, 0.05);
}
body.dark-mode .friend-links li a {
  color: rgba(255, 255, 255, 0.5);
}
body.dark-mode .friend-links li a:hover {
  color: var(--primary);
  background: rgba(233, 69, 96, 0.1);
}

/* ===== 打印样式 ===== */
@media print {
  .site-header, .banner, .back-to-top, .nav-actions, .search-bar {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
  }
  .section {
    padding: 20px 0;
    page-break-inside: avoid;
  }
}