/* ================================
   上海汉猿工业产品设计有限公司 - 主样式
   ================================ */

:root {
  --primary: #1a1a2e;
  --accent: #C9B59A;
  --accent2: #0f3460;
  --light: #f5f5f5;
  --white: #ffffff;
  --gray: #888;
  --dark-gray: #333;
  --border: #e0e0e0;
  --font-main: 'Microsoft YaHei', 'PingFang SC', Arial, sans-serif;
  --transition: all 0.3s ease;
  --shadow: 0 4px 20px rgba(0,0,0,0.1);
  --shadow-hover: 0 8px 40px rgba(0,0,0,0.18);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-main);
  color: var(--dark-gray);
  background: var(--white);
  line-height: 1.6;
}

a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 80px 0; }
.section-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
  color: var(--primary);
  letter-spacing: 2px;
}
.section-title span { color: var(--accent); }
.section-sub {
  text-align: center;
  color: var(--gray);
  font-size: 0.95rem;
  margin-bottom: 50px;
}
.section-sub::after {
  content: '';
  display: block;
  width: 50px;
  height: 3px;
  background: var(--accent);
  margin: 14px auto 0;
  border-radius: 2px;
}
.btn {
  display: inline-block;
  padding: 12px 32px;
  background: var(--accent);
  color: var(--white);
  border-radius: 3px;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 1px;
  border: 2px solid var(--accent);
  cursor: pointer;
  transition: var(--transition);
}
.btn:hover { background: transparent; color: var(--accent); }
.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid var(--white);
}
.btn-outline:hover { background: var(--white); color: var(--accent); }

/* ===== 顶部公告栏 ===== */
.top-bar {
  background: var(--primary);
  color: rgba(255,255,255,0.7);
  font-size: 0.82rem;
  padding: 8px 0;
}
.top-bar .container { display: flex; justify-content: space-between; align-items: center; }
.top-bar a { color: rgba(255,255,255,0.7); }
.top-bar a:hover { color: var(--accent); }

/* ===== 导航栏 ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(18,18,24,0.80);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: 0 2px 20px rgba(0,0,0,0.25);
  transition: var(--transition);
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo { display: flex; align-items: center; gap: 0; }
.logo-img-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.logo-img { height: 38px; width: auto; display: block; }
.logo-img-wrap .logo-cn-img {
  position: absolute; inset: 0; height: 38px; width: auto; display: block;
  opacity: 0; transition: opacity .3s;
}
.logo-img-wrap:hover .logo-cn-img { opacity: 1; }
.logo-img-wrap:hover .logo-en-img { opacity: 0; }

.nav-menu { display: flex; align-items: center; gap: 0; }
.nav-item { position: relative; }
.nav-link {
  display: block;
  padding: 28px 18px;
  font-size: 0.93rem;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  letter-spacing: 0.5px;
  transition: var(--transition);
}
.nav-link:hover, .nav-link.active { color: #C9B59A; }


/* 下拉菜单 */
.dropdown { position: relative; }
.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 160px;
  background: var(--white);
  box-shadow: var(--shadow);
  border-top: 3px solid var(--accent);
  z-index: 100;
}
.dropdown:hover .dropdown-menu { display: block; }
.dropdown-menu a {
  display: block;
  padding: 10px 20px;
  font-size: 0.88rem;
  color: var(--dark-gray);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.dropdown-menu a:hover { background: var(--light); color: var(--accent); padding-left: 28px; }

.nav-contact-btn {
  background: var(--accent);
  color: var(--white) !important;
  padding: 10px 22px !important;
  border-radius: 3px;
  margin-left: 10px;
}
.nav-contact-btn:hover { background: var(--primary) !important; color: var(--white) !important; }
.nav-contact-btn::after { display: none !important; }

/* 汉堡菜单 */
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 5px; }
.hamburger span { width: 24px; height: 2px; background: rgba(255,255,255,0.85); border-radius: 2px; transition: var(--transition); }

/* ===== Hero Banner ===== */
.hero {
  position: relative;
  height: 680px;
  overflow: hidden;
  background: var(--primary);
}
.swiper-container, .hero-swiper { width: 100%; height: 100%; }
.hero-slide {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transition: transform 6s ease;
}
.hero-slide:hover .hero-bg { transform: scale(1.04); }
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,26,46,0.85) 0%, rgba(15,52,96,0.6) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 620px;
  margin-left: 10%;
  animation: fadeInUp 0.8s ease;
}
.hero-tag {
  display: inline-block;
  background: var(--accent);
  color: var(--white);
  font-size: 0.8rem;
  padding: 5px 14px;
  border-radius: 2px;
  margin-bottom: 18px;
  letter-spacing: 2px;
  text-transform: uppercase;
}
.hero-title {
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: 2px;
}
.hero-desc {
  font-size: 1rem;
  color: rgba(255,255,255,0.8);
  margin-bottom: 32px;
  line-height: 1.8;
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-arrows { position: absolute; right: 40px; bottom: 40px; display: flex; gap: 10px; z-index: 5; }
.hero-arrow {
  width: 44px; height: 44px;
  border: 2px solid rgba(255,255,255,0.5);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; color: white; font-size: 1rem;
  transition: var(--transition);
}
.hero-arrow:hover { background: var(--accent); border-color: var(--accent); }

.hero-dots { position: absolute; bottom: 48px; left: 50%; transform: translateX(-50%); display: flex; gap: 8px; z-index: 5; }
.hero-dot {
  width: 8px; height: 8px;
  border-radius: 4px;
  background: rgba(255,255,255,0.4);
  cursor: pointer;
  transition: var(--transition);
}
.hero-dot.active { width: 24px; background: var(--accent); }

/* ===== 数据统计 ===== */
.stats-bar {
  background: var(--primary);
  padding: 40px 0;
}
.stats-bar .container { display: flex; justify-content: space-around; flex-wrap: wrap; gap: 20px; }
.stat-item { text-align: center; flex: 1; min-width: 120px; }
.stat-num { font-size: 2.4rem; font-weight: 700; color: #C9B59A; line-height: 1; }
.stat-unit { font-size: 1rem; color: #C9B59A; font-weight: 400; }
.stat-label { font-size: 0.88rem; color: rgba(255,255,255,0.6); margin-top: 6px; letter-spacing: 1px; }

/* ===== 关于我们（首页简介） ===== */
.about-home { background: var(--white); }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-img-wrap { position: relative; }
.about-img-wrap img { border-radius: 4px; box-shadow: var(--shadow); width: 100%; object-fit: cover; height: 400px; }
.about-badge {
  position: absolute;
  bottom: -20px;
  right: -20px;
  width: 120px;
  height: 120px;
  background: var(--accent);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 0.85rem;
  text-align: center;
  line-height: 1.3;
}
.about-badge strong { font-size: 1.4rem; display: block; }
.about-text .tag { color: var(--accent); font-size: 0.85rem; font-weight: 600; letter-spacing: 3px; text-transform: uppercase; margin-bottom: 12px; }
.about-text h2 { font-size: 1.8rem; color: var(--primary); margin-bottom: 16px; line-height: 1.3; }
.about-text p { color: #555; line-height: 1.9; margin-bottom: 14px; }
.about-features { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 24px 0; }
.about-feature { display: flex; align-items: flex-start; gap: 10px; }
.about-feature i { color: var(--accent); margin-top: 3px; font-size: 1rem; }
.about-feature span { font-size: 0.9rem; color: #555; }

/* ===== 服务模块 ===== */
.services { background: var(--light); }
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.service-card {
  background: var(--white);
  padding: 36px 28px;
  border-radius: 0;
  text-align: center;
  transition: var(--transition);
  border-bottom: 3px solid transparent;
  box-shadow: var(--shadow);
}
.service-card:hover { transform: translateY(-6px); border-bottom-color: var(--accent); box-shadow: var(--shadow-hover); }
.service-icon { width: 68px; height: 68px; border-radius: 50%; background: linear-gradient(135deg, var(--accent2), var(--accent)); display: flex; align-items: center; justify-content: center; margin: 0 auto 20px; }
.service-icon i { font-size: 1.6rem; color: var(--white); }
.service-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--primary); margin-bottom: 12px; }
.service-card p { font-size: 0.88rem; color: var(--gray); line-height: 1.8; }

/* ===== 产品展示 ===== */
.products { background: var(--white); }
.product-tabs { display: flex; justify-content: center; gap: 10px; margin-bottom: 40px; flex-wrap: wrap; }
.tab-btn {
  padding: 9px 22px;
  border: 2px solid var(--border);
  border-radius: 3px;
  background: transparent;
  font-size: 0.88rem;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-main);
  color: var(--dark-gray);
}
.tab-btn.active, .tab-btn:hover { border-color: var(--accent); color: var(--accent); background: rgba(233,69,96,0.05); }
.products-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product-card {
  border-radius: 0;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  background: var(--white);
  cursor: pointer;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.product-img-wrap { position: relative; overflow: hidden; height: 240px; }
.product-img-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.product-card:hover .product-img-wrap img { transform: scale(1.08); }
.product-overlay {
  position: absolute;
  inset: 0;
  background: rgba(26,26,46,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}
.product-card:hover .product-overlay { opacity: 1; }
.product-overlay a {
  width: 44px; height: 44px;
  border: 2px solid white;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: white; font-size: 1rem; margin: 0 6px;
  transition: var(--transition);
}
.product-overlay a:hover { background: var(--accent); border-color: var(--accent); }
.product-info { padding: 18px 20px; }
.product-info h4 { font-size: 0.98rem; font-weight: 600; color: var(--primary); margin-bottom: 6px; }
.product-info p { font-size: 0.83rem; color: var(--gray); line-height: 1.6; }
.product-cat { display: inline-block; font-size: 0.75rem; color: var(--accent); border: 1px solid var(--accent); padding: 2px 8px; border-radius: 2px; margin-top: 8px; }
.view-more-wrap { text-align: center; margin-top: 40px; }

/* ===== 案例展示 ===== */
.cases { background: var(--light); }
.cases-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.case-card {
  position: relative;
  overflow: hidden;
  border-radius: 0;
  height: 280px;
  cursor: pointer;
}
.case-card.big { grid-row: span 2; height: 100%; }
.case-img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.case-card:hover .case-img { transform: scale(1.06); }
.case-info {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 20px 24px;
  background: linear-gradient(transparent, rgba(26,26,46,0.92));
  color: var(--white);
  transform: translateY(20px);
  transition: var(--transition);
}
.case-card:hover .case-info { transform: translateY(0); }
.case-info h4 { font-size: 1rem; font-weight: 700; margin-bottom: 6px; }
.case-info p { font-size: 0.83rem; opacity: 0.8; line-height: 1.5; }
.case-tag { display: inline-block; font-size: 0.72rem; background: var(--accent); padding: 3px 10px; border-radius: 2px; margin-bottom: 8px; letter-spacing: 1px; }

/* ===== 新闻动态 ===== */
.news { background: var(--white); }
.news-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 32px; }
.news-featured {
  position: relative;
  overflow: hidden;
  border-radius: 0;
  cursor: pointer;
}
.news-featured img { width: 100%; height: 320px; object-fit: cover; transition: transform 0.5s ease; }
.news-featured:hover img { transform: scale(1.04); }
.news-featured-info {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 28px;
  background: linear-gradient(transparent, rgba(15,52,96,0.93));
  color: var(--white);
}
.news-featured-info .date { font-size: 0.8rem; opacity: 0.7; margin-bottom: 8px; }
.news-featured-info h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 8px; }
.news-featured-info p { font-size: 0.85rem; opacity: 0.8; line-height: 1.6; }

.news-list { display: flex; flex-direction: column; gap: 0; }
.news-item {
  display: flex;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
}
.news-item:hover { padding-left: 8px; }
.news-item:last-child { border-bottom: none; }
.news-date-box {
  min-width: 52px;
  text-align: center;
  background: var(--light);
  border-radius: 4px;
  padding: 8px 6px;
  transition: var(--transition);
}
.news-item:hover .news-date-box { background: var(--accent); }
.news-date-box .day { font-size: 1.4rem; font-weight: 700; color: var(--primary); line-height: 1; }
.news-date-box .month { font-size: 0.72rem; color: var(--gray); margin-top: 2px; }
.news-item:hover .news-date-box .day,
.news-item:hover .news-date-box .month { color: var(--white); }
.news-info h4 { font-size: 0.92rem; font-weight: 600; color: var(--primary); margin-bottom: 6px; line-height: 1.4; }
.news-info p { font-size: 0.82rem; color: var(--gray); line-height: 1.5; }

/* ===== 视频展示 ===== */
.video-section { background: var(--primary); padding: 80px 0; }
.video-section .section-title { color: var(--white); }
.video-wrap {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  max-width: 820px;
  margin: 0 auto;
  cursor: pointer;
}
.video-wrap video, .video-wrap img { width: 100%; height: 460px; object-fit: cover; display: block; }
.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.35);
  transition: var(--transition);
}
.video-play-btn:hover { background: rgba(0,0,0,0.2); }
.video-play-btn i {
  width: 72px; height: 72px;
  background: var(--accent);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem;
  color: var(--white);
  transition: var(--transition);
}
.video-play-btn:hover i { transform: scale(1.1); }

/* ===== 合作客户 ===== */
.partners { background: var(--light); padding: 60px 0; }
.partners-title { text-align: center; font-size: 0.88rem; color: var(--gray); letter-spacing: 3px; text-transform: uppercase; margin-bottom: 32px; }
.partners-logos { display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 30px 50px; }
.partner-logo {
  height: 48px;
  opacity: 0.5;
  filter: grayscale(1);
  transition: var(--transition);
  display: flex; align-items: center;
}
.partner-logo:hover { opacity: 1; filter: grayscale(0); }
.partner-logo img { height: 100%; }

/* ===== 联系我们（首页） ===== */
.contact-banner {
  background: linear-gradient(135deg, var(--accent2), var(--primary));
  padding: 70px 0;
  text-align: center;
  color: var(--white);
}
.contact-banner h2 { font-size: 2rem; font-weight: 700; margin-bottom: 12px; }
.contact-banner p { font-size: 1rem; opacity: 0.8; margin-bottom: 30px; }
.contact-info-row { display: flex; justify-content: center; gap: 40px; margin-bottom: 32px; flex-wrap: wrap; }
.contact-info-item { display: flex; align-items: center; gap: 10px; font-size: 0.95rem; }
.contact-info-item i { font-size: 1.1rem; color: var(--accent); }

/* ===== 页脚 ===== */
.footer { background: var(--primary); color: rgba(255,255,255,0.65); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 40px; margin-bottom: 40px; }
.footer-about .footer-logo-text { font-size: 1.1rem; font-weight: 700; color: var(--white); margin-bottom: 16px; }
.footer-about p { font-size: 0.85rem; line-height: 1.9; margin-bottom: 20px; }
.footer-social { display: flex; gap: 10px; }
.social-icon {
  width: 36px; height: 36px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,0.6); font-size: 0.9rem;
  transition: var(--transition);
}
.social-icon:hover { background: var(--accent); border-color: var(--accent); color: var(--white); }

.footer-col h4 { color: var(--white); font-size: 0.95rem; font-weight: 600; margin-bottom: 20px; position: relative; padding-bottom: 10px; }
.footer-col h4::after { content: ''; position: absolute; bottom: 0; left: 0; width: 30px; height: 2px; background: var(--accent); }
.footer-links li { margin-bottom: 10px; }
.footer-links a { font-size: 0.85rem; color: rgba(255,255,255,0.6); transition: var(--transition); }
.footer-links a:hover { color: var(--accent); padding-left: 6px; }

.footer-contact-info li { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 12px; font-size: 0.85rem; }
.footer-contact-info i { color: var(--accent); margin-top: 2px; min-width: 16px; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  flex-wrap: wrap;
  gap: 10px;
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--accent); }

/* ===== 回到顶部 ===== */
.back-top {
  position: fixed;
  right: 28px;
  bottom: 28px;
  width: 44px;
  height: 44px;
  background: var(--accent);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
  box-shadow: 0 4px 14px rgba(233,69,96,0.4);
}
.back-top.show { opacity: 1; visibility: visible; }
.back-top:hover { transform: translateY(-3px); }

/* ===== 动画 ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .hero { height: 480px; }
  .hero-title { font-size: 1.8rem; }
  .about-grid { grid-template-columns: 1fr; }
  .about-badge { display: none; }
  .services-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .case-card.big { grid-row: auto; height: 280px; }
  .news-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .stats-bar .container { flex-direction: row; flex-wrap: wrap; }
  .stat-item { min-width: 50%; }
  .top-bar { display: none; }
  .contact-info-row { flex-direction: column; align-items: center; gap: 16px; }
  .page-hero { padding: 60px 0 40px; }
  .page-hero h1 { font-size: 1.8rem; }
}
@media (max-width: 480px) {
  .products-grid { grid-template-columns: 1fr; }
  .hero-content { margin-left: 5%; }
  .hero-title { font-size: 1.5rem; }
  .section { padding: 50px 0; }
  .section-title { font-size: 1.5rem; }
  .page-hero { padding: 50px 0 30px; }
  .page-hero h1 { font-size: 1.5rem; }
}

/* 页面内容占位图 */
.img-placeholder {
  background: linear-gradient(135deg, #e8ecf0, #c8d0da);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #8899aa;
  font-size: 0.85rem;
}