/* ========================================
   山东铂石精密仪器有限公司 - 企业网站样式 v2.0
   ======================================== */

/* ===== CSS 设计变量 ===== */
:root {
  /* 品牌色 */
  --primary:       #0f2744;
  --primary-light: #1a3a5c;
  --primary-dark:  #091a2e;
  --accent:        #c8a96e;
  --accent-light:  #dfc28e;
  --accent-dark:   #a88840;

  /* 文字 */
  --text-primary:   #1a202c;
  --text-secondary: #4a5568;
  --text-light:     #718096;
  --text-muted:     #a0aec0;

  /* 背景 */
  --bg-white:   #ffffff;
  --bg-light:   #f8f9fa;
  --bg-section: #f3f5f8;

  /* 边框 */
  --border:       #e2e8f0;
  --border-light: #edf2f7;

  /* 阴影 */
  --shadow-xs:     0 1px 3px rgba(0,0,0,0.06);
  --shadow-sm:     0 2px 8px rgba(0,0,0,0.08);
  --shadow-md:     0 6px 20px rgba(0,0,0,0.09);
  --shadow-lg:     0 12px 40px rgba(0,0,0,0.11);
  --shadow-xl:     0 20px 60px rgba(0,0,0,0.14);
  --shadow-accent: 0 8px 28px rgba(200,169,110,0.22);

  /* 圆角 */
  --radius-sm: 4px;
  --radius:    8px;
  --radius-lg: 14px;
  --radius-xl: 24px;

  /* 过渡 */
  --transition:      0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.45s cubic-bezier(0.4, 0, 0.2, 1);

  /* 布局 */
  --nav-height: 72px;
}

/* ===== 重置 & 基础 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  color: var(--text-primary);
  background: var(--bg-white);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ===== 容器 ===== */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ===== 通用 Section ===== */
.section { padding: 100px 0; }

/* ===== Section Header ===== */
.section-header {
  text-align: center;
  margin-bottom: 64px;
}
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 4px;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-label::before,
.section-label::after {
  content: '';
  display: block;
  width: 24px;
  height: 1px;
  background: var(--accent);
  opacity: 0.5;
}
.section-title {
  font-size: 34px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 18px;
  letter-spacing: 1px;
}
.section-divider {
  width: 56px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  margin: 0 auto 22px;
  border-radius: 2px;
}
.section-desc {
  color: var(--text-secondary);
  font-size: 15px;
  max-width: 580px;
  margin: 0 auto;
  line-height: 1.85;
}

/* =========================================
   导航栏
   ========================================= */
#header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(9, 26, 46, 0.80);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(200,169,110,0.08);
  transition: background var(--transition), border-color var(--transition);
}
#header.scrolled {
  background: rgba(9, 26, 46, 0.97);
  border-bottom-color: rgba(200,169,110,0.18);
  box-shadow: 0 4px 24px rgba(0,0,0,0.3);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.logo-icon { width: 40px; height: 40px; flex-shrink: 0; }
.logo-text { display: flex; flex-direction: column; gap: 2px; }
.logo-cn {
  font-size: 15px;
  font-weight: 700;
  color: #ffffff;
  white-space: nowrap;
  letter-spacing: 0.5px;
}
.logo-en {
  font-size: 7.5px;
  letter-spacing: 0.8px;
  color: rgba(255,255,255,0.38);
  white-space: nowrap;
}

.main-nav ul { display: flex; gap: 2px; }
.nav-link {
  display: block;
  padding: 7px 14px;
  font-size: 13.5px;
  color: rgba(255,255,255,0.70);
  border-radius: var(--radius);
  transition: var(--transition);
  font-weight: 400;
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 3px;
  left: 14px;
  right: 14px;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
  transform: scaleX(0);
  transition: transform var(--transition);
  transform-origin: center;
}
.nav-link:hover { color: #fff; }
.nav-link:hover::after { transform: scaleX(0.6); }
.nav-link.active {
  color: var(--accent);
  background: rgba(200,169,110,0.08);
}
.nav-link.active::after { transform: scaleX(1); }

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: rgba(255,255,255,0.8);
  border-radius: 2px;
  transition: var(--transition);
}

/* =========================================
   Hero
   ========================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  padding-top: var(--nav-height);
}

/* 背景轮播 */
.hero-slideshow {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  background: var(--primary-dark);
}
.hero-slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0;
  transition: opacity 1.2s ease;
}
.hero-slide.active { opacity: 1; }
.hero-slide-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    130deg,
    rgba(9,26,46,0.88) 0%,
    rgba(9,26,46,0.68) 50%,
    rgba(9,26,46,0.82) 100%
  );
}

/* 左右箭头 */
.hslide-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 3;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.22);
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(8px);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}
.hslide-btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: var(--shadow-accent);
}
.hslide-btn svg { width: 20px; height: 20px; }
.hslide-prev { left: 28px; }
.hslide-next { right: 28px; }

/* 底部说明条 */
.hslide-bar {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  z-index: 3;
  padding: 16px 36px;
  background: linear-gradient(transparent, rgba(5,15,30,0.75));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.hslide-captions { flex: 1; position: relative; height: 20px; overflow: hidden; }
.hslide-cap {
  position: absolute;
  top: 0; left: 0;
  font-size: 12px;
  color: rgba(255,255,255,0.48);
  letter-spacing: 1.5px;
  opacity: 0;
  transition: opacity 0.5s ease;
  white-space: nowrap;
}
.hslide-cap.active { opacity: 1; }
.hslide-progress { display: flex; gap: 8px; align-items: center; flex-shrink: 0; }
.hslide-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255,255,255,0.28);
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid rgba(255,255,255,0.38);
}
.hslide-dot.active {
  background: var(--accent);
  border-color: var(--accent);
  width: 24px;
  border-radius: 3px;
}

/* Hero 内容 */
.hero-content {
  position: relative;
  z-index: 2;
  padding: 80px 28px 40px;
  max-width: 1240px;
  margin: 0 auto;
  width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 20px;
  border: 1px solid rgba(200,169,110,0.45);
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 3px;
  margin-bottom: 28px;
  border-radius: 2px;
  position: relative;
}
.hero-badge::before {
  content: '';
  display: block;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
}

.hero-title {
  font-size: clamp(34px, 5vw, 60px);
  font-weight: 700;
  color: #ffffff;
  line-height: 1.2;
  margin-bottom: 18px;
  letter-spacing: 3px;
  white-space: normal;
  word-break: keep-all;
  overflow-wrap: break-word;
}
/* 英文版公司名较长：压缩字距、略缩小字号、允许换行自然断词 */
html[data-lang="en"] .hero-title {
  letter-spacing: 0.5px;
  font-size: clamp(28px, 4.2vw, 52px);
  word-break: normal;
  overflow-wrap: normal;
}
.hero-title-accent {
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 16px;
  color: var(--accent-light);
  margin-bottom: 22px;
  font-weight: 300;
  letter-spacing: 2px;
}

.hero-desc {
  font-size: 14.5px;
  color: rgba(255,255,255,0.52);
  max-width: 620px;
  margin-bottom: 44px;
  line-height: 2;
}

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* Hero 统计栏 */
.hero-stats {
  position: relative;
  z-index: 2;
  background: rgba(200,169,110,0.05);
  border-top: 1px solid rgba(200,169,110,0.14);
  backdrop-filter: blur(10px);
  padding: 36px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 12px 24px;
  border-right: 1px solid rgba(200,169,110,0.12);
  gap: 6px;
}
.stat-item:last-child { border-right: none; }
.stat-num {
  font-size: 38px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  display: flex;
  align-items: baseline;
  gap: 2px;
}
.stat-plus { font-size: 22px; font-weight: 500; }
.stat-label {
  font-size: 12.5px;
  color: rgba(255,255,255,0.45);
  letter-spacing: 0.5px;
}

/* =========================================
   按钮
   ========================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 36px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
  letter-spacing: 0.5px;
  font-family: inherit;
  gap: 8px;
}
.btn-primary {
  background: var(--accent);
  color: var(--primary-dark);
  border-color: var(--accent);
  box-shadow: 0 4px 16px rgba(200,169,110,0.3);
}
.btn-primary:hover {
  background: var(--accent-light);
  border-color: var(--accent-light);
  box-shadow: 0 6px 24px rgba(200,169,110,0.4);
  transform: translateY(-1px);
}
.btn-outline {
  background: transparent;
  color: rgba(255,255,255,0.85);
  border-color: rgba(255,255,255,0.28);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(200,169,110,0.06);
}
.btn-full { width: 100%; }

/* =========================================
   产品中心
   ========================================= */
.products-section { background: var(--bg-white); }

.product-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 44px;
  border-bottom: 1px solid var(--border);
}
.tab-btn {
  padding: 13px 32px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-light);
  background: none;
  border: none;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  margin-bottom: -1px;
  transition: var(--transition);
  font-family: inherit;
  letter-spacing: 0.3px;
}
.tab-btn:hover { color: var(--primary); }
.tab-btn.active {
  color: var(--accent-dark);
  border-bottom-color: var(--accent);
  font-weight: 600;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.product-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  overflow: hidden;
  background: var(--bg-white);
  transition: box-shadow var(--transition-slow), transform var(--transition-slow), border-color var(--transition);
  box-shadow: var(--shadow-xs);
}
.product-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-5px);
  border-color: rgba(200,169,110,0.35);
}

.product-img {
  position: relative;
  height: 200px;
  overflow: hidden;
  flex-shrink: 0;
}
.product-img-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-slow);
}
.product-card:hover .product-img-placeholder { transform: scale(1.04); }
.product-img-placeholder svg { width: 150px; height: 120px; }
.marble-bg {
  background: linear-gradient(140deg, #262626 0%, #383838 50%, #1a1a1a 100%);
}
.instrument-bg {
  background: linear-gradient(140deg, #162132 0%, #0d1c2b 50%, #1c2d3e 100%);
}
.custom-bg {
  background: linear-gradient(140deg, #182618 0%, #122012 50%, #1e301e 100%);
}

.product-category {
  position: absolute;
  top: 14px;
  left: 14px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--primary-dark);
  background: var(--accent);
  padding: 3px 10px;
  border-radius: 3px;
  text-transform: uppercase;
  z-index: 2;
}

.product-info {
  padding: 22px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}
.product-info h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--primary);
  line-height: 1.4;
}
.product-info p {
  font-size: 12.5px;
  color: var(--text-secondary);
  line-height: 1.75;
  flex: 1;
}
.product-specs {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px;
  background: var(--bg-section);
  border-radius: var(--radius);
}
.product-specs span {
  font-size: 11.5px;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 6px;
}
.product-specs span::before {
  content: '';
  display: block;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}
.product-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-dark);
  transition: var(--transition);
  align-self: flex-start;
  margin-top: 4px;
}
.product-link::after {
  content: '→';
  font-size: 14px;
  transition: transform var(--transition);
}
.product-link:hover { color: var(--accent); }
.product-link:hover::after { transform: translateX(4px); }

/* =========================================
   企业风采
   ========================================= */
.showcase-section { background: var(--bg-section); }
.showcase-layout { margin-top: 0; }
.showcase-carousel-wrap { display: flex; flex-direction: column; gap: 12px; }

.carousel {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #f0f4f8;
  aspect-ratio: 16 / 10;
}
.carousel-track {
  display: flex;
  width: 100%;
  height: 100%;
  transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}
.carousel-slide { min-width: 100%; position: relative; display: none; flex-direction: column; }
.carousel-slide.active { display: flex; }
.slide-placeholder { flex: 1; overflow: hidden; }
.slide-placeholder svg { width: 100%; height: 100%; display: block; }
.slide-caption {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 10px 16px;
  background: linear-gradient(transparent, rgba(10,25,45,0.7));
  color: rgba(255,255,255,0.85);
  font-size: 13px;
}
.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: none;
  background: rgba(255,255,255,0.9);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  z-index: 2;
  box-shadow: 0 2px 10px rgba(0,0,0,0.15);
}
.carousel-btn:hover { background: var(--accent); color: #fff; }
.carousel-btn svg { width: 18px; height: 18px; }
.carousel-prev { left: 12px; }
.carousel-next { right: 12px; }
.carousel-dots {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 6px;
  z-index: 2;
}
.dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid rgba(255,255,255,0.6);
}
.dot.active { background: var(--accent); border-color: var(--accent); width: 20px; border-radius: 4px; }
.carousel-thumbnails { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 4px; scrollbar-width: thin; }
.thumb {
  flex-shrink: 0;
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid #ddd;
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.thumb.active, .thumb:hover { border-color: var(--accent); color: var(--accent); background: rgba(200,169,110,0.06); }

/* 视频区 */
.showcase-video-full { display: flex; flex-direction: column; gap: 20px; }
.video-main-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(200,169,110,0.12);
  box-shadow: var(--shadow-lg);
}
.video-placeholder {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #091a2e;
  overflow: hidden;
  cursor: pointer;
}
.video-placeholder svg { width: 100%; height: 100%; display: block; }
.video-placeholder video,
.video-placeholder iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: none; }
/* ====== 企业风采：视频区（彻底拆开「封面图」与「真视频画面」，避免看起来像在播一张图片） ====== */
.video-placeholder {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #091a2e;
  overflow: hidden;
  cursor: pointer;
}
.video-dim-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(5,18,35,0.0) 0%, rgba(5,18,35,0.55) 100%);
  transition: opacity 0.35s ease;
  z-index: 2;
  pointer-events: none;
}
.company-video {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  display: block;
  background: #000;
  object-fit: cover;
  z-index: 1;
}
/* 封面图：放在按钮内部，只在未播放时可见（不再复用 lazy-bg / poster 两个相同图） */
.video-play-btn {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform: none;
  background: none;
  border: none;
  cursor: pointer;
  transition: opacity 0.3s ease;
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  pointer-events: auto;
  padding: 0;
  overflow: hidden;
}
.video-cover {
  position: absolute; inset: 0;
  background: #0a1f38 url('static/1.png') center/cover no-repeat;
  z-index: 0;
  transform: scale(1.02);
  transition: transform 0.5s ease, filter 0.5s ease, opacity 0.3s ease;
}
.video-play-btn:hover .video-cover { transform: scale(1.05); filter: brightness(1.05); }
.video-play-svg {
  width: 92px; height: 92px; flex: 0 0 92px;
  position: relative; z-index: 1;
  filter: drop-shadow(0 10px 30px rgba(0,0,0,0.45));
  transition: transform 0.25s ease;
}
.video-play-btn:hover .video-play-svg { transform: scale(1.08); }
.video-play-hint {
  position: relative; z-index: 1;
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 2px;
  background: rgba(0,0,0,0.55);
  padding: 8px 20px;
  border-radius: 999px;
  border: 1px solid rgba(200,169,110,0.55);
  backdrop-filter: blur(4px);
}
/* 播放态：封面+按钮+遮罩全部隐藏，video 独占容器且变成 contain，完整显示视频真实画面 */
.video-placeholder.is-playing .video-play-btn { opacity: 0; pointer-events: none; visibility: hidden; }
.video-placeholder.is-playing .video-cover   { opacity: 0; }
.video-placeholder.is-playing .video-dim-overlay { opacity: 0; }
.video-placeholder.is-playing .company-video {
  z-index: 9;
  object-fit: contain;
  background: #000;
}

/* 左下角视频元信息/状态条：让用户一眼知道「真视频在动」还是「停在封面」 */
.video-meta {
  position: absolute;
  left: 16px;
  bottom: 14px;
  z-index: 10;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(3px);
  color: #fff;
  font-size: 12px;
  letter-spacing: 0.5px;
  pointer-events: none;
  transition: opacity 0.25s ease;
}
.video-meta .vm-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: #8fa0b8;
  flex: 0 0 8px;
  box-shadow: 0 0 0 2px rgba(255,255,255,0.15);
}
.video-meta .vm-dot--idle    { background: #8fa0b8; }
.video-meta .vm-dot--loading { background: #ffbf47; animation: vm-blink 0.9s infinite; }
.video-meta .vm-dot--playing { background: #3ddc97; animation: vm-pulse 1.2s infinite; }
.video-meta .vm-dot--paused  { background: #c8a96e; }
.video-meta .vm-dot--ended   { background: #ff6b6b; }
.video-meta .vm-text         { opacity: 0.95; }
.video-meta .vm-time         { opacity: 0.75; margin-left: 4px; font-variant-numeric: tabular-nums; }
@keyframes vm-blink { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }
@keyframes vm-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(61,220,151,0.7); }
  70%  { box-shadow: 0 0 0 10px rgba(61,220,151,0); }
  100% { box-shadow: 0 0 0 0 rgba(61,220,151,0); }
}
/* 正在播放时半透明，避免挡画面但仍能一眼看到状态 */
.video-placeholder.is-playing .video-meta { opacity: 0.65; }

.video-error-tip {
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  color: #fff;
  background: rgba(0,0,0,0.78);
  padding: 14px 22px;
  border-radius: 10px;
  font-size: 13px;
  z-index: 20;
  text-align: center;
  line-height: 1.7;
  max-width: 82%;
  border: 1px solid rgba(255,120,120,0.45);
}

/* ========== 中英语言切换（高亮版：非激活纯白 + 金色激活，避免看不清） ========== */
.lang-switch {
  display: inline-flex;
  align-items: stretch;
  height: 36px;
  margin-left: 14px;
  border: 1.5px solid rgba(232,201,138,0.85);
  border-radius: 999px;
  overflow: hidden;
  background: rgba(9,26,46,0.55);
  backdrop-filter: blur(6px);
  user-select: none;
  flex-shrink: 0;
  z-index: 3;
  box-shadow: 0 6px 22px rgba(0,0,0,0.22), inset 0 0 0 1px rgba(255,255,255,0.06);
}
.lang-switch__btn {
  height: 100%;
  padding: 0 14px;
  border: none;
  background: transparent;
  color: #ffffff;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.5px;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
  white-space: nowrap;
  text-shadow: 0 1px 0 rgba(0,0,0,0.35);
}
.lang-switch__btn:hover {
  color: #fff6e0;
  background: rgba(200,169,110,0.22);
}
.lang-switch__btn.active {
  background: linear-gradient(135deg, #e7c98a 0%, #c8a96e 55%, #9f7f44 100%);
  color: #1a2b44;
  text-shadow: 0 1px 0 rgba(255,255,255,0.35);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.45);
}
.lang-switch__sep {
  width: 1.5px;
  background: linear-gradient(180deg, rgba(232,201,138,0.18), rgba(232,201,138,0.72), rgba(232,201,138,0.18));
}
/* 切英文时：导航栏略微压缩间距，避免换行 */
html[data-lang="en"] .main-nav > ul > li > a.nav-link { padding-left: 10px; padding-right: 10px; font-size: 13.5px; }
html[data-lang="en"] .logo-en { opacity: 1; }
html[data-lang="zh"] .logo-en { opacity: 0.9; }
html[data-lang="en"] .logo-cn { display: none; }
html[data-lang="zh"] .logo-en { display: block; }
/* 移动端：语言按钮进入汉堡菜单上方 / 右对齐压缩边距 */
@media (max-width: 1024px) {
  .lang-switch { margin-left: 10px; height: 32px; }
  .lang-switch__btn { padding: 0 11px; font-size: 12px; }
}
@media (max-width: 768px) {
  .nav-container { position: relative; }
  .lang-switch {
    position: absolute;
    top: 50%;
    right: 72px;
    transform: translateY(-50%);
    margin-left: 0;
    height: 32px;
  }
}
/* EN 版式：一些标题/产品说明字号微调，避免换行撑破容器 */
html[data-lang="en"] .section-title,
html[data-lang="en"] .sub-banner-content h1 { letter-spacing: 0.5px; }
html[data-lang="en"] .product-info h3,
html[data-lang="en"] .advantage-card h3,
html[data-lang="en"] .app-item h3,
html[data-lang="en"] .partner-item p,
html[data-lang="en"] .about-card h4,
html[data-lang="en"] .quick-card h3 {
  line-height: 1.45;
  font-size: 15.5px;
}
html[data-lang="en"] .sub-banner-content h1 { font-size: 36px; }
@media (max-width: 768px) {
  html[data-lang="en"] .sub-banner-content h1 { font-size: 26px; }
}
.video-main-info {
  padding: 22px 30px;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.vmi-text h4 { font-size: 16px; font-weight: 600; color: var(--primary); margin-bottom: 5px; }
.vmi-text p { font-size: 13px; color: var(--text-secondary); }
.video-sub-links { display: flex; gap: 12px; flex-wrap: wrap; }
.video-link-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border: 1px solid rgba(200,169,110,0.18);
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
}
.video-link-item:hover { border-color: var(--accent); background: rgba(200,169,110,0.04); }
.vl-icon {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: rgba(200,169,110,0.10);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--accent);
}
.vl-icon svg { width: 14px; height: 14px; }
.video-link-item strong { display: block; font-size: 13px; color: var(--primary); margin-bottom: 1px; }
.video-link-item span { font-size: 11.5px; color: var(--text-muted); }

/* 图片缩略 */
.photo-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 10px;
}
.photo-item {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  background-size: cover;
  background-position: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.photo-item:hover { transform: translateY(-3px); box-shadow: 0 10px 28px rgba(0,0,0,0.22); }
.photo-label {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 6px 8px;
  background: linear-gradient(transparent, rgba(0,0,0,0.65));
  color: rgba(255,255,255,0.85);
  font-size: 11px;
  text-align: center;
}
.photo-more .photo-more-icon {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -60%);
  font-size: 28px;
  color: rgba(200,169,110,0.65);
  font-weight: 300;
}

/* =========================================
   核心优势
   ========================================= */
.advantages-section { background: var(--bg-white); }
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.advantage-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 38px 30px 32px;
  border: 1px solid var(--border-light);
  transition: var(--transition-slow);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-xs);
}
.advantage-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  transform: scaleX(0);
  transition: transform var(--transition-slow);
  transform-origin: left;
}
.advantage-card::after {
  content: attr(data-num);
  position: absolute;
  top: 20px;
  right: 22px;
  font-size: 52px;
  font-weight: 800;
  color: rgba(200,169,110,0.07);
  line-height: 1;
  font-family: 'Georgia', serif;
  letter-spacing: -2px;
  pointer-events: none;
}
.advantage-card:hover {
  border-color: rgba(200,169,110,0.30);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.advantage-card:hover::before { transform: scaleX(1); }

.adv-icon {
  width: 54px;
  height: 54px;
  margin-bottom: 20px;
}
.advantage-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 12px;
}
.advantage-card p {
  color: var(--text-secondary);
  font-size: 13.5px;
  line-height: 1.85;
  margin-bottom: 18px;
}
.adv-highlight {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  background: rgba(200,169,110,0.08);
  border: 1px solid rgba(200,169,110,0.22);
  color: var(--accent-dark);
  font-size: 11.5px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  letter-spacing: 0.3px;
}
.adv-highlight::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

/* =========================================
   应用领域
   ========================================= */
.applications-section { background: var(--bg-section); }
.applications-section .section-label { color: var(--accent); }
.applications-section .section-title { color: var(--primary); }
.applications-section .section-divider { background: linear-gradient(90deg, var(--accent), var(--accent-light)); }
.applications-section .section-desc { color: var(--text-secondary); }

.applications-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.app-item {
  padding: 36px 28px 32px;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  transition: var(--transition-slow);
  border: 1px solid rgba(15,39,68,0.06);
  box-shadow: var(--shadow-xs);
  position: relative;
  overflow: hidden;
}
.app-item::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}
.app-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: rgba(200,169,110,0.25);
}
.app-item:hover::after { transform: scaleX(1); }

.app-icon-wrap {
  width: 56px;
  height: 56px;
  background: rgba(200,169,110,0.10);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 20px;
  transition: var(--transition);
}
.app-item:hover .app-icon-wrap {
  background: var(--accent);
  color: var(--primary-dark);
}
.app-icon-wrap svg { width: 28px; height: 28px; }
.app-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 10px;
}
.app-item p {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.85;
}

/* =========================================
   合作伙伴
   ========================================= */
.partners-section { background: var(--bg-white); }
.partners-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 56px;
}
.partner-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 16px;
  padding: 36px 24px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  background: var(--bg-white);
  transition: var(--transition-slow);
  box-shadow: var(--shadow-xs);
  position: relative;
  overflow: hidden;
}
.partner-item::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}
.partner-item:hover {
  border-color: rgba(200,169,110,0.30);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.partner-item:hover::before { opacity: 1; }
.partner-logo-wrap svg { width: 100%; max-width: 150px; height: auto; }
.partner-item p {
  font-size: 12.5px;
  color: var(--text-light);
  line-height: 1.7;
}

/* =========================================
   新闻资讯
   ========================================= */
.news-section { background: var(--bg-section); }
.news-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}

.news-featured {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-light);
  transition: var(--transition-slow);
  box-shadow: var(--shadow-xs);
}
.news-featured:hover { box-shadow: var(--shadow-md); border-color: rgba(200,169,110,0.28); }

.news-img-placeholder {
  height: 200px;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-light) 70%, rgba(200,169,110,0.2) 100%);
  position: relative;
  display: flex;
  align-items: flex-end;
  padding: 20px;
}
.news-img-placeholder::after {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23c8a96e' fill-opacity='0.04'%3E%3Crect x='0' y='0' width='1' height='40'/%3E%3Crect x='0' y='0' width='40' height='1'/%3E%3C/g%3E%3C/svg%3E");
}
.news-date-badge {
  position: absolute;
  top: 20px; left: 20px;
  background: var(--accent);
  padding: 8px 14px;
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1.2;
  z-index: 1;
  box-shadow: 0 4px 12px rgba(200,169,110,0.35);
}
.news-day { font-size: 24px; font-weight: 700; color: var(--primary-dark); }
.news-month { font-size: 9.5px; color: var(--primary-dark); font-weight: 700; letter-spacing: 0.5px; }
.news-category-tag {
  background: rgba(200,169,110,0.18);
  color: var(--accent-light);
  padding: 5px 14px;
  border-radius: 3px;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 1.5px;
  z-index: 1;
}

.news-content { padding: 26px 28px; }
.news-content h3 {
  font-size: 15.5px;
  font-weight: 600;
  color: var(--primary);
  line-height: 1.6;
  margin-bottom: 12px;
}
.news-content p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 18px;
}
.news-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-dark);
  transition: var(--transition);
}
.news-more::after { content: '→'; transition: transform var(--transition); }
.news-more:hover { color: var(--accent); }
.news-more:hover::after { transform: translateX(4px); }

/* 新闻列表 */
.news-list { display: flex; flex-direction: column; }
.news-item {
  display: flex;
  gap: 20px;
  padding: 20px 24px;
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-bottom: none;
  transition: var(--transition);
}
.news-item:first-child { border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
.news-item:last-child {
  border-bottom: 1px solid var(--border-light);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}
.news-item:hover { background: rgba(200,169,110,0.025); }

.news-item-date {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 2px;
  width: 48px;
  border-right: 1px solid var(--border-light);
  margin-right: 4px;
  padding-right: 16px;
}
.item-month { font-size: 10px; color: var(--text-muted); margin-bottom: 2px; }
.item-day { font-size: 24px; font-weight: 700; color: var(--primary); line-height: 1.1; }

.news-item-content { flex: 1; }
.news-tag {
  display: inline-block;
  padding: 2px 9px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.5px;
  border-radius: 3px;
  margin-bottom: 7px;
}
.news-tag.industry { background: rgba(59,130,246,0.08); color: #2563eb; }
.news-tag.tech     { background: rgba(16,185,129,0.08); color: #059669; }
.news-tag.company  { background: rgba(200,169,110,0.10); color: var(--accent-dark); }
.news-tag.policy   { background: rgba(139,92,246,0.08); color: #7c3aed; }

.news-item-content h4 {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--primary);
  line-height: 1.55;
  margin-bottom: 5px;
}
.news-item-content p { font-size: 12px; color: var(--text-light); line-height: 1.65; }

/* =========================================
   关于我们
   ========================================= */
.about-section { background: var(--bg-white); }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.about-content h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 22px;
  position: relative;
  padding-bottom: 16px;
}
.about-content h3::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 48px; height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  border-radius: 2px;
}
.about-content p {
  color: var(--text-secondary);
  font-size: 14.5px;
  margin-bottom: 18px;
  line-height: 1.9;
}
.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}
.tag {
  padding: 6px 16px;
  background: rgba(15,39,68,0.05);
  border: 1px solid rgba(15,39,68,0.10);
  color: var(--primary);
  font-size: 12.5px;
  border-radius: var(--radius);
  font-weight: 600;
  transition: var(--transition);
}
.tag:hover {
  background: rgba(200,169,110,0.08);
  border-color: rgba(200,169,110,0.3);
  color: var(--accent-dark);
}

.about-visual { display: flex; flex-direction: column; gap: 20px; }
.about-img-placeholder {
  border-radius: var(--radius-lg);
  height: 280px;
  overflow: hidden;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-md);
}
.about-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.about-card {
  padding: 22px;
  background: var(--bg-light);
  border-radius: var(--radius);
  border: 1px solid var(--border-light);
  transition: var(--transition);
}
.about-card:hover {
  border-color: rgba(200,169,110,0.3);
  background: rgba(200,169,110,0.04);
  box-shadow: var(--shadow-sm);
}
.about-card-icon { width: 38px; height: 38px; color: var(--accent); margin-bottom: 12px; }
.about-card h4 { font-size: 14px; font-weight: 600; color: var(--primary); margin-bottom: 6px; }
.about-card p { font-size: 12.5px; color: var(--text-secondary); line-height: 1.65; }

/* =========================================
   联系我们
   ========================================= */
.contact-section { background: var(--bg-section); }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 40px;
  align-items: start;
}

.contact-card-main {
  background: linear-gradient(145deg, var(--primary) 0%, var(--primary-light) 60%, rgba(200,169,110,0.12) 100%);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  color: #ffffff;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.contact-card-main::before {
  content: '';
  position: absolute;
  top: -60px; right: -60px;
  width: 200px; height: 200px;
  border-radius: 50%;
  background: rgba(200,169,110,0.06);
}
.contact-card-main::after {
  content: '';
  position: absolute;
  bottom: -40px; left: -40px;
  width: 140px; height: 140px;
  border-radius: 50%;
  background: rgba(200,169,110,0.04);
}
.contact-card-main h3 {
  font-size: 19px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 5px;
  position: relative;
  z-index: 1;
}
.company-slogan {
  font-size: 12px;
  color: var(--accent-light);
  letter-spacing: 2px;
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
}

.contact-items { display: flex; flex-direction: column; gap: 22px; position: relative; z-index: 1; }
.contact-item { display: flex; gap: 16px; align-items: flex-start; }
.contact-icon {
  width: 38px; height: 38px;
  background: rgba(200,169,110,0.14);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
}
.contact-icon svg { width: 18px; height: 18px; }
.contact-label {
  display: block;
  font-size: 10.5px;
  color: rgba(255,255,255,0.38);
  letter-spacing: 0.8px;
  margin-bottom: 4px;
  text-transform: uppercase;
}
.contact-item p {
  font-size: 13.5px;
  color: rgba(255,255,255,0.82);
  line-height: 1.65;
}

.contact-form-wrap {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}
.contact-form h3 {
  font-size: 19px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 28px;
}

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 7px; margin-bottom: 18px; }
.form-group label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.3px;
}
.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 13.5px;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg-white);
  transition: var(--transition);
  outline: none;
  width: 100%;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(200,169,110,0.12);
}
.form-group textarea { resize: vertical; }
.form-group select { cursor: pointer; }
.form-note {
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
  margin-top: 12px;
}

/* =========================================
   页脚
   ========================================= */
.footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.55);
  border-top: 1px solid rgba(200,169,110,0.12);
}
.footer-main { padding: 64px 0 44px; }
.footer-grid {
  display: grid;
  grid-template-columns: 2.2fr 1fr 1.5fr 1.5fr;
  gap: 52px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.footer-logo svg { width: 34px; height: 34px; }
.footer-logo span { font-size: 15px; font-weight: 700; color: rgba(255,255,255,0.88); }
.footer-brand p { font-size: 13px; line-height: 1.85; margin-bottom: 20px; }

.footer-cert { display: flex; flex-wrap: wrap; gap: 8px; }
.footer-cert span {
  padding: 4px 12px;
  border: 1px solid rgba(200,169,110,0.22);
  color: var(--accent);
  font-size: 11px;
  border-radius: 3px;
  font-weight: 500;
}

.footer-links h4,
.footer-products h4,
.footer-contact h4 {
  font-size: 12.5px;
  font-weight: 700;
  color: rgba(255,255,255,0.82);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.footer-links ul,
.footer-products ul { display: flex; flex-direction: column; gap: 9px; }
.footer-links li a,
.footer-products li a {
  font-size: 13px;
  color: rgba(255,255,255,0.45);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.footer-links li a::before,
.footer-products li a::before {
  content: '';
  width: 4px;
  height: 1px;
  background: rgba(200,169,110,0.4);
  flex-shrink: 0;
}
.footer-links li a:hover,
.footer-products li a:hover { color: var(--accent-light); }

.footer-contact p { font-size: 13px; margin-bottom: 8px; }
.footer-qr { display: flex; align-items: center; gap: 12px; margin-top: 18px; }
.qr-placeholder {
  width: 72px; height: 72px;
  background: rgba(255,255,255,0.05);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 5px;
  border: 1px solid rgba(200,169,110,0.12);
}
.qr-placeholder svg { width: 62px; height: 62px; }
.footer-qr span { font-size: 11px; color: rgba(255,255,255,0.38); }

.footer-bottom {
  padding: 20px 0;
  border-top: 1px solid rgba(255,255,255,0.05);
}
.footer-bottom .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom p { font-size: 12px; color: rgba(255,255,255,0.28); }

/* =========================================
   悬浮联系方式
   ========================================= */

/* 整体容器：fixed 定位，高度 = 按钮高度 */
.fc-wrap {
  position: fixed;
  right: 32px;
  bottom: 96px;
  z-index: 998;
  width: 48px;   /* 与按钮等宽，防止影响页面布局 */
  height: 48px;
}

/* 触发按钮 */
.fc-btn {
  position: relative;
  z-index: 2;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  border: 1px solid rgba(200,169,110,0.40);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0,0,0,0.28);
  transition: background var(--transition), color var(--transition),
              border-color var(--transition), border-radius var(--transition),
              box-shadow var(--transition);
  outline: none;
}
.fc-btn:hover,
.fc-wrap.fc-open .fc-btn {
  background: var(--accent);
  color: var(--primary-dark);
  border-color: var(--accent);
  box-shadow: var(--shadow-accent);
  border-radius: 12px 12px 12px 0;
}
.fc-btn svg { display: block; flex-shrink: 0; }

/* 信息卡片：绝对定位到按钮正上方，默认完全隐藏 */
.fc-card {
  position: absolute;
  bottom: calc(100% + 8px);   /* 贴在按钮上方 8px */
  right: 0;
  width: 268px;
  background: var(--primary-dark);
  border-radius: 14px 14px 14px 4px;
  border: 1px solid rgba(200,169,110,0.18);
  box-shadow: 0 16px 56px rgba(0,0,0,0.40);
  overflow: hidden;
  /* 默认隐藏（双保险） */
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px) scale(0.97);
  transform-origin: bottom right;
  pointer-events: none;
  transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s;
}
.fc-card::before {
  content: '';
  display: block;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light), transparent);
}

/* 打开状态 */
.fc-wrap.fc-open .fc-card {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

/* 卡片头部 */
.fc-card-head {
  padding: 14px 18px 12px;
  border-bottom: 1px solid rgba(200,169,110,0.10);
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.fc-card-title {
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.8px;
}
.fc-card-sub {
  font-size: 11px;
  color: rgba(255,255,255,0.35);
}

/* 信息行 */
.fc-line {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 11px 18px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  transition: background var(--transition);
}
.fc-line:hover { background: rgba(200,169,110,0.05); }

.fc-line-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  background: rgba(200,169,110,0.10);
  border-radius: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-top: 3px;
}

.fc-line-body {
  display: flex;
  flex-direction: column;
  gap: 3px;
  flex: 1;
  min-width: 0;
}
.fc-line-label {
  font-size: 10px;
  color: rgba(255,255,255,0.30);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 1px;
}
.fc-line-val {
  font-size: 12.5px;
  color: rgba(255,255,255,0.80);
  line-height: 1.6;
  display: block;
  transition: color var(--transition);
}
a.fc-line-val:hover { color: var(--accent-light); }

/* 二维码区 */
.fc-qr-block {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 18px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.fc-qr-img {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(200,169,110,0.15);
  border-radius: 6px;
  padding: 4px;
  flex-shrink: 0;
  line-height: 0;
}
.fc-qr-title {
  font-size: 13px;
  color: rgba(255,255,255,0.72);
  font-weight: 600;
  margin-bottom: 3px;
}
.fc-qr-sub {
  font-size: 11px;
  color: rgba(255,255,255,0.35);
}

/* CTA 按钮 */
.fc-cta {
  display: block;
  margin: 12px 18px 16px;
  padding: 10px 0;
  text-align: center;
  background: var(--accent);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 700;
  border-radius: var(--radius);
  transition: background var(--transition), box-shadow var(--transition);
  letter-spacing: 0.5px;
}
.fc-cta:hover {
  background: var(--accent-light);
  box-shadow: 0 4px 14px rgba(200,169,110,0.35);
}

/* 手机端 */
@media (max-width: 768px) {
  .fc-wrap { right: 16px; bottom: 80px; width: 44px; height: 44px; }
  .fc-btn  { width: 44px; height: 44px; }
  .fc-card { width: 248px; }
}

/* =========================================
   回顶部按钮
   ========================================= */
.back-to-top {
  position: fixed;
  bottom: 36px;
  right: 32px;
  z-index: 999;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--primary);
  border: 1px solid rgba(200,169,110,0.35);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0,0,0,0.25);
  transition: var(--transition);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
}
.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.back-to-top:hover {
  background: var(--accent);
  color: var(--primary-dark);
  box-shadow: var(--shadow-accent);
  transform: translateY(-2px);
}
.back-to-top svg { width: 20px; height: 20px; }

/* =========================================
   动画
   ========================================= */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-20px); }
  to   { opacity: 1; transform: translateX(0); }
}
.fade-in-up { opacity: 0; animation: fadeInUp 0.6s ease forwards; }
.fade-in-up.delay-1 { animation-delay: 0.1s; }
.fade-in-up.delay-2 { animation-delay: 0.22s; }
.fade-in-up.delay-3 { animation-delay: 0.38s; }

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* 错落延迟 */
.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }
.reveal-delay-4 { transition-delay: 0.32s; }
.reveal-delay-5 { transition-delay: 0.40s; }
.reveal-delay-6 { transition-delay: 0.48s; }

/* =========================================
   响应式
   ========================================= */
@media (max-width: 1024px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2) { border-right: none; }
  .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0; right: 0;
    background: rgba(9,26,46,0.98);
    padding: 16px 0;
    border-top: 1px solid rgba(200,169,110,0.10);
    backdrop-filter: blur(20px);
  }
  .main-nav.open { display: block; }
  .main-nav ul { flex-direction: column; gap: 2px; padding: 0 16px; }
  .nav-link { padding: 11px 14px; border-radius: var(--radius); }
  .nav-link::after { display: none; }
  .menu-toggle { display: flex; }

  .section { padding: 64px 0; }
  .section-title { font-size: 26px; }

  .about-grid { grid-template-columns: 1fr; gap: 36px; }
  .photo-grid { grid-template-columns: repeat(3, 1fr); }
  .video-main-info { flex-direction: column; align-items: flex-start; }
  .advantages-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .advantage-card { padding: 26px 22px; }

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

  .applications-grid { grid-template-columns: 1fr 1fr; }
  .partners-grid { grid-template-columns: 1fr 1fr; }

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

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

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

@media (max-width: 540px) {
  .hero-title { font-size: 28px; }
  .hero-subtitle { font-size: 14px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .advantages-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr; }
  .photo-grid { grid-template-columns: repeat(3, 1fr); }
  .applications-grid { grid-template-columns: 1fr; }
  .partners-grid { grid-template-columns: 1fr 1fr; }
  .about-cards { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom .container { flex-direction: column; align-items: flex-start; }
  .logo-en { display: none; }
  .back-to-top { bottom: 20px; right: 16px; }
  .sub-banner-content h1 { font-size: 26px; }
  .home-quick-grid { grid-template-columns: 1fr; }
  .cta-band-inner { flex-direction: column; align-items: flex-start; }
}

/* =========================================
   子页 Banner
   ========================================= */
.sub-banner {
  position: relative;
  padding: calc(var(--nav-height) + 72px) 0 72px;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  overflow: hidden;
  color: #fff;
}
.sub-banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(9,26,46,0.92) 0%,
    rgba(9,26,46,0.78) 50%,
    rgba(15,39,68,0.85) 100%
  );
}
.sub-banner-content {
  position: relative;
  z-index: 1;
  text-align: center;
}
.sub-banner-content h1 {
  font-size: 40px;
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: 3px;
}
.sub-banner-content p {
  font-size: 14.5px;
  color: rgba(255,255,255,0.62);
  max-width: 620px;
  margin: 0 auto 22px;
  line-height: 1.8;
}
.breadcrumb {
  display: inline-flex;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(200,169,110,0.10);
  border: 1px solid rgba(200,169,110,0.20);
  border-radius: 999px;
  font-size: 12px;
  color: rgba(255,255,255,0.55);
  letter-spacing: 0.5px;
}
.breadcrumb a {
  color: var(--accent-light);
  transition: color var(--transition);
}
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span { color: rgba(255,255,255,0.65); }

/* =========================================
   首页快速入口
   ========================================= */
.home-quick-section { background: var(--bg-white); }
.home-quick-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 16px;
}
.quick-card {
  display: block;
  padding: 34px 28px 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  background: var(--bg-white);
  transition: var(--transition-slow);
  box-shadow: var(--shadow-xs);
  position: relative;
  overflow: hidden;
}
.quick-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s ease;
}
.quick-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-5px);
  border-color: rgba(200,169,110,0.30);
  background: var(--bg-light);
}
.quick-card:hover::before { transform: scaleX(1); }
.quick-icon {
  width: 60px; height: 60px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  transition: var(--transition);
}
.quick-icon svg { width: 34px; height: 34px; }
.quick-icon-1 { background: rgba(200,169,110,0.10); }
.quick-icon-2 { background: rgba(16,185,129,0.08); }
.quick-icon-3 { background: rgba(59,130,246,0.08); }
.quick-icon-4 { background: rgba(139,92,246,0.08); }
.quick-icon-5 { background: rgba(244,114,182,0.08); }
.quick-icon-6 { background: rgba(239,68,68,0.08); }
.quick-card:hover .quick-icon { background: var(--accent); }
.quick-card:hover .quick-icon svg { stroke: var(--primary-dark) !important; }
.quick-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 10px;
}
.quick-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}
.quick-link {
  display: inline-flex;
  align-items: center;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--accent-dark);
  letter-spacing: 0.5px;
  transition: var(--transition);
}
.quick-card:hover .quick-link {
  color: var(--accent);
  letter-spacing: 1px;
}

/* =========================================
   CTA 栏
   ========================================= */
.cta-band {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, rgba(200,169,110,0.15) 100%);
  padding: 48px 0;
  border-top: 1px solid rgba(200,169,110,0.14);
  border-bottom: 1px solid rgba(200,169,110,0.14);
}
.cta-band-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-band-inner h3 {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
  letter-spacing: 0.5px;
}
.cta-band-inner p {
  font-size: 13.5px;
  color: rgba(255,255,255,0.55);
}
.btn-lg {
  padding: 16px 44px;
  font-size: 15px;
}

@media (max-width: 1024px) {
  .home-quick-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .home-quick-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .quick-card { padding: 24px 20px; }
  .sub-banner { padding: calc(var(--nav-height) + 56px) 0 56px; }
  .sub-banner-content h1 { font-size: 30px; }
}