/* ========================================
   三机精控 - 设计系统 v2
   配色：深蓝 #1c2680 + 红色 #dd213c + 白色
   ======================================== */

:root {
  --blue: #1c2680;
  --blue-light: #2a3a9e;
  --blue-dark: #121a5c;
  --blue-pale: #e8ecf8;
  --red: #dd213c;
  --red-light: #e8465c;
  --red-dark: #b01a30;
  --white: #ffffff;
  --gray-50: #f8f9fc;
  --gray-100: #f0f2f7;
  --gray-200: #e2e5ed;
  --gray-300: #c8cdd8;
  --gray-500: #7a8299;
  --gray-700: #3d4457;
  --gray-900: #1a1d28;
  --font: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Noto Sans SC', sans-serif;
  --font-num: 'DIN Alternate', 'SF Mono', 'Menlo', monospace;
  --shadow-sm: 0 2px 8px rgba(28,38,128,0.06);
  --shadow-md: 0 4px 20px rgba(28,38,128,0.1);
  --shadow-lg: 0 8px 40px rgba(28,38,128,0.15);
  --shadow-card: 0 2px 12px rgba(0,0,0,0.06);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body { font-family: var(--font); font-size: 15px; color: var(--gray-700); background: var(--white); line-height: 1.7; -webkit-font-smoothing: antialiased; overflow-x: hidden; max-width: 100vw; }
a { text-decoration: none; color: inherit; transition: color var(--transition); }
ul, ol { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ========================================
   滚动动画
   ======================================== */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity 0.8s ease, transform 0.8s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-left { opacity: 0; transform: translateX(-50px); transition: opacity 0.8s ease, transform 0.8s ease; }
.reveal-left.visible { opacity: 1; transform: translateX(0); }
.reveal-right { opacity: 0; transform: translateX(50px); transition: opacity 0.8s ease, transform 0.8s ease; }
.reveal-right.visible { opacity: 1; transform: translateX(0); }
.reveal-scale { opacity: 0; transform: scale(0.9); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal-scale.visible { opacity: 1; transform: scale(1); }

/* ========================================
   顶部栏
   ======================================== */
.top-bar {
  background: var(--blue-dark); color: rgba(255,255,255,0.7);
  height: 40px; line-height: 40px; font-size: 13px;
}
.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(--white); }
.top-bar .phone { display: flex; align-items: center; gap: 6px; color: var(--white); font-weight: 500; }
.top-bar .phone svg { width: 14px; height: 14px; fill: var(--red); }

/* ========================================
   导航栏
   ======================================== */
.main-header {
  background: var(--white); position: sticky; top: 0; z-index: 1000;
  box-shadow: 0 1px 0 var(--gray-200); transition: box-shadow var(--transition);
}
.main-header.scrolled { box-shadow: var(--shadow-md); }
.main-header .container { display: flex; justify-content: space-between; align-items: center; height: 80px; }
.logo { display: flex; align-items: center; gap: 12px; }
.logo img { height: 56px; width: auto; }
.logo-text { display: none; }
.nav-menu { display: flex; gap: 0; }
.nav-menu > li > a {
  display: block; padding: 0 22px; line-height: 72px; font-size: 15px;
  font-weight: 500; color: var(--gray-700); position: relative; transition: color var(--transition);
}
.nav-menu > li > a:hover, .nav-menu > li > a.active { color: var(--blue); }
.nav-menu > li > a::after {
  content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
  width: 0; height: 3px; background: var(--red); border-radius: 3px 3px 0 0;
  transition: width var(--transition);
}
.nav-menu > li > a:hover::after, .nav-menu > li > a.active::after { width: 60%; }

.menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: 10px; }
.menu-toggle span { display: block; width: 22px; height: 2px; background: var(--blue); margin: 5px 0; transition: var(--transition); border-radius: 2px; }

/* ========================================
   Banner
   ======================================== */
.banner { position: relative; width: 100%; aspect-ratio: 16/9; overflow: hidden; background: var(--blue-dark); }
.banner-slides { position: relative; width: 100%; height: 100%; }
.banner-slide {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  opacity: 0; transition: opacity 1.2s ease; display: flex; align-items: center; justify-content: center;
}
.banner-slide.active { opacity: 1; }
.banner-slide .slide-bg {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  background-size: cover; background-position: center;
}
.banner-slide .slide-bg img {
  width: 100%; height: 100%; object-fit: cover;
}
.banner-slide .slide-bg::after {
  content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  background: linear-gradient(135deg, rgba(28,38,128,0.85) 0%, rgba(18,26,92,0.6) 50%, rgba(221,33,60,0.3) 100%);
}
.banner-slide .slide-content {
  position: relative; z-index: 2; text-align: center; color: white; padding: 0 24px;
  max-width: 800px;
}
.banner-slide .slide-content .tag {
  display: inline-block; padding: 8px 24px; background: rgba(221,33,60,0.9);
  border-radius: 20px; font-size: 16px; font-weight: 600; letter-spacing: 3px;
  margin-bottom: 24px; animation: fadeInDown 0.8s ease 0.3s both;
}
.banner-slide .slide-content h2 {
  font-size: 54px; font-weight: 900; line-height: 1.2; margin-bottom: 16px;
  letter-spacing: 3px; animation: fadeInUp 0.8s ease 0.5s both;
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}
.banner-slide .slide-content p {
  font-size: 17px; opacity: 0.9; margin-bottom: 32px; font-weight: 300;
  animation: fadeInUp 0.8s ease 0.7s both;
}
.banner-slide .slide-content .btn-group { animation: fadeInUp 0.8s ease 0.9s both; }
.banner-btn {
  position: absolute; top: 50%; transform: translateY(-50%); z-index: 10;
  width: 48px; height: 48px; background: rgba(255,255,255,0.15); backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.2); border-radius: 50%; color: white;
  font-size: 18px; cursor: pointer; transition: var(--transition);
  display: flex; align-items: center; justify-content: center;
}
.banner-btn:hover { background: var(--red); border-color: var(--red); transform: translateY(-50%) scale(1.1); }
.banner-btn.prev { left: 24px; }
.banner-btn.next { right: 24px; }
.banner-dots {
  position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%); z-index: 10;
  display: flex; gap: 10px;
}
.banner-dots .dot {
  width: 32px; height: 4px; border-radius: 4px; background: rgba(255,255,255,0.3);
  cursor: pointer; transition: var(--transition);
}
.banner-dots .dot.active { background: var(--red); width: 48px; }

/* Banner进入动画 */
@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeInDown { from { opacity: 0; transform: translateY(-20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeInLeft { from { opacity: 0; transform: translateX(-40px); } to { opacity: 1; transform: translateX(0); } }
@keyframes fadeInRight { from { opacity: 0; transform: translateX(40px); } to { opacity: 1; transform: translateX(0); } }
@keyframes scaleIn { from { opacity: 0; transform: scale(0.8); } to { opacity: 1; transform: scale(1); } }
@keyframes pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.05); } }

/* ========================================
   按钮
   ======================================== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 32px; border-radius: 6px; font-size: 15px; font-weight: 500;
  cursor: pointer; transition: all var(--transition); border: none; font-family: var(--font);
  letter-spacing: 0.5px;
}
.btn-white { background: var(--white); color: var(--blue); }
.btn-white:hover { background: var(--gray-100); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-red { background: var(--red); color: var(--white); }
.btn-red:hover { background: var(--red-light); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(221,33,60,0.3); }
.btn-outline-white { background: transparent; color: var(--white); border: 1.5px solid rgba(255,255,255,0.5); }
.btn-outline-white:hover { background: var(--white); color: var(--blue); border-color: var(--white); }
.btn-blue { background: var(--blue); color: var(--white); }
.btn-blue:hover { background: var(--blue-light); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(28,38,128,0.3); }

/* ========================================
   3栏产品入口（Banner下方）
   ======================================== */
.product-entrance {
  padding: 60px 24px 20px; position: relative; z-index: 10;
}
.product-entrance .container {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px;
}
.product-entrance .section-title {
  grid-column: 1 / -1; text-align: center; margin-bottom: 20px;
}
.product-entrance .section-title .overline {
  font-size: 13px; font-weight: 600; color: var(--red); letter-spacing: 4px;
  text-transform: uppercase; margin-bottom: 8px; font-family: var(--font-num);
}
.product-entrance .section-title h2 {
  font-size: 36px; font-weight: 900; color: var(--gray-900); margin: 0;
}
.entrance-card {
  background: var(--white); border-radius: 16px; padding: 36px 48px;
  box-shadow: var(--shadow-card); display: flex; align-items: center; gap: 24px;
  cursor: pointer; transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative; overflow: hidden; border: 1px solid var(--gray-100);
}
.entrance-card::before {
  content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px;
  background: var(--blue); transition: all var(--transition);
}
.entrance-card:hover { transform: translateY(-6px); box-shadow: 0 16px 48px rgba(28,38,128,0.12); }
.entrance-card:hover::before { height: 100%; background: linear-gradient(135deg, var(--blue) 0%, var(--blue-light) 100%); opacity: 0.05; }
.entrance-card .entrance-text { flex: 1; min-width: 0; }
.entrance-card .entrance-text h3 { font-size: 24px; font-weight: 800; color: var(--gray-900); margin: 0 0 8px 0; }
.entrance-card .entrance-text p { font-size: 15px; color: var(--gray-500); line-height: 1.6; margin: 0; }
.entrance-card .entrance-btn {
  flex-shrink: 0; padding: 4px 14px; background: var(--blue); color: white;
  border-radius: 4px; font-size: 12px; font-weight: 500;
  transition: all var(--transition); letter-spacing: 0.5px;
}
.entrance-card:hover .entrance-btn { background: var(--red); }
#coreBusinesses { display: flex; flex-direction: column; gap: 20px; grid-column: 1 / -1; }
#coreBusinesses .entrance-card { width: 100%; justify-content: space-between; }

/* ========================================
   Banner下方标语
   ======================================== */
.banner-tagline {
  text-align: center;
  padding: 20px 5px;
  background: var(--white);
}
.banner-tagline img {
  display: block;
  width: 100%;
  height: auto;
}

/* ========================================
   新产品展示区 - 全幅
   ======================================== */
.equipment-showcase {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px;
  padding: 0 12px;
}
.equipment-card {
  position: relative; overflow: hidden;
  height: auto; aspect-ratio: 16/9; cursor: pointer; width: 100%;
  display: flex; align-items: center; justify-content: center;
  background: var(--gray-100);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid var(--gray-200);
}
.equipment-card::after {
  content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  background: linear-gradient(135deg, rgba(28,38,128,0.7), rgba(221,33,60,0.3));
  opacity: 0; transition: opacity 0.4s ease;
}
.equipment-card:hover::after { opacity: 1; }
.equipment-card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0,0,0,0.15); }
.equipment-card .equip-placeholder {
  text-align: center; color: var(--gray-400); z-index: 1; transition: all 0.3s ease;
}
.equipment-card .equip-placeholder svg { width: 48px; height: 48px; fill: var(--gray-300); margin-bottom: 8px; }
.equipment-card .equip-placeholder p { font-size: 14px; font-weight: 500; }
.equipment-card:hover .equip-placeholder { color: white; transform: scale(1.05); }
.equipment-card:hover .equip-placeholder svg { fill: rgba(255,255,255,0.6); }
.equipment-card .equip-badge {
  position: absolute; top: 16px; left: 16px; padding: 4px 14px;
  background: var(--red); color: white; border-radius: 4px; font-size: 12px; font-weight: 600;
  z-index: 2; letter-spacing: 1px;
}
.equipment-card img { position: absolute; top: 0; left: 0; width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
.equipment-card:hover img { transform: scale(1.06); }
.equipment-card .equip-overlay {
  position: absolute; bottom: 0; left: 0; width: 100%; padding: 20px;
  background: linear-gradient(transparent, rgba(0,0,0,0.7));
  color: white; z-index: 2; transform: translateY(10px); opacity: 0;
  transition: all 0.3s ease;
}
.equipment-card:hover .equip-overlay { transform: translateY(0); opacity: 1; }
.equipment-card .equip-overlay h4 { font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.equipment-card .equip-overlay p { font-size: 13px; opacity: 0.8; }

/* ========================================
   区块标题
   ======================================== */
.section { padding: 80px 0; }
.section-header { text-align: center; margin-bottom: 50px; }
.section-header .overline {
  display: inline-block; font-size: 13px; font-weight: 500; color: var(--red);
  letter-spacing: 3px; text-transform: uppercase; margin-bottom: 12px;
}
.section-header h2 { font-size: 36px; font-weight: 900; color: var(--gray-900); letter-spacing: 1px; }
.section-header .line { width: 48px; height: 3px; background: var(--red); margin: 16px auto; border-radius: 3px; }
.section-header p { font-size: 15px; color: var(--gray-500); max-width: 560px; margin: 0 auto; }

/* ========================================
   产品展示
   ======================================== */
.products-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.product-card {
  background: var(--white); border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-card); transition: all var(--transition); cursor: pointer;
  border: 1px solid var(--gray-200);
}
.product-card:hover {
  transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: transparent;
}
.product-card .card-img {
  aspect-ratio: 16/9; background: transparent; overflow: hidden; position: relative;
  display: flex; align-items: center; justify-content: center;
}
.product-card .card-img img { width: calc(100% - 16px); height: calc(100% - 16px); object-fit: contain; transition: transform 0.6s ease; }
.product-card:hover .card-img img { transform: scale(1.08); }
.product-card .card-img .overlay {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  background: linear-gradient(180deg, transparent 50%, rgba(28,38,128,0.7) 100%);
  opacity: 0; transition: opacity var(--transition);
}
.product-card:hover .card-img .overlay { opacity: 1; }
.product-card .card-img .view-btn {
  position: absolute; bottom: 16px; left: 50%; transform: translateX(-50%) translateY(10px);
  padding: 8px 24px; background: var(--white); color: var(--blue); border-radius: 4px;
  font-size: 13px; font-weight: 500; opacity: 0; transition: all var(--transition);
}
.product-card:hover .card-img .view-btn { opacity: 1; transform: translateX(-50%) translateY(0); }
.product-card .card-body { padding: 28px; }
.product-card .card-body h3 { font-size: 20px; font-weight: 700; color: var(--gray-900); margin-bottom: 10px; }
.product-card .card-body p { font-size: 14px; color: var(--gray-500); line-height: 1.6; }

/* ========================================
   企业优势
   ======================================== */
.advantages { background: var(--gray-50); }
.advantages-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.advantage-card {
  text-align: center; padding: 40px 24px; background: var(--white);
  border-radius: var(--radius); transition: all var(--transition);
  border: 1px solid transparent;
}
.advantage-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--blue-pale); }
.advantage-card .adv-icon {
  width: 72px; height: 72px; margin: 0 auto 20px; border-radius: 50%;
  background: linear-gradient(135deg, var(--blue-pale), var(--white));
  display: flex; align-items: center; justify-content: center; transition: all var(--transition);
}
.advantage-card:hover .adv-icon { background: linear-gradient(135deg, var(--blue), var(--blue-light)); transform: rotateY(180deg); }
.advantage-card .adv-icon svg { width: 32px; height: 32px; fill: var(--blue); transition: fill var(--transition); }
.advantage-card:hover .adv-icon svg { fill: var(--white); }
.advantage-card h4 { font-size: 17px; font-weight: 700; color: var(--gray-900); margin-bottom: 10px; }
.advantage-card p { font-size: 13px; color: var(--gray-500); line-height: 1.7; }

/* 合作单位 */
.partners-section { margin-top: 48px; }
.partners-row {
  display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 32px;
  padding: 24px 0;
}
.partner-item {
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  transition: transform var(--transition);
}
.partner-item:hover { transform: translateY(-4px); }
.partner-item img {
  width: 200px; height: 100px; object-fit: contain;
  background: var(--white); border: 1px solid var(--gray-200); border-radius: 8px; padding: 12px;
}
.partner-placeholder {
  width: 200px; height: 100px; display: flex; align-items: center; justify-content: center;
  background: var(--gray-100); border: 1px dashed var(--gray-300); border-radius: 8px;
  font-size: 13px; color: var(--gray-500);
}
.partner-item span { font-size: 13px; color: var(--gray-700); font-weight: 500; }

@media (max-width: 768px) {
  .partners-row { gap: 20px; }
  .partner-item img, .partner-placeholder { width: 140px; height: 70px; }
}

/* ========================================
   数据看板
   ======================================== */
.stats-bar {
  background: linear-gradient(135deg, var(--blue-dark), var(--blue));
  padding: 60px 0; position: relative; overflow: hidden;
}
.stats-bar::before {
  content: ''; position: absolute; top: -50%; right: -10%; width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(221,33,60,0.15), transparent 70%);
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; text-align: center; position: relative; }
.stat-item .stat-num {
  font-size: 48px; font-weight: 900; color: var(--white); font-family: var(--font-num);
  line-height: 1;
}
.stat-item .stat-num .unit { font-size: 20px; font-weight: 400; opacity: 0.8; margin-left: 4px; }
.stat-item .stat-label { font-size: 14px; color: rgba(255,255,255,0.6); margin-top: 10px; }

/* ========================================
   关于我们
   ======================================== */
.about-section .container { display: flex; gap: 60px; align-items: center; }
.about-img { flex: 1; position: relative; }
.about-img img { border-radius: var(--radius); box-shadow: var(--shadow-lg); width: 100%; }
.about-img .float-badge {
  position: absolute; bottom: -20px; right: -20px; background: var(--red);
  color: white; padding: 20px 28px; border-radius: var(--radius);
  box-shadow: 0 8px 30px rgba(221,33,60,0.3); text-align: center;
}
.about-img .float-badge .num { font-size: 36px; font-weight: 900; font-family: var(--font-num); }
.about-img .float-badge .txt { font-size: 13px; opacity: 0.9; }
.about-text { flex: 1; }
.about-text .overline { font-size: 13px; color: var(--red); font-weight: 500; letter-spacing: 3px; margin-bottom: 12px; }
.about-text h2 { font-size: 30px; font-weight: 900; color: var(--gray-900); margin-bottom: 20px; }
.about-text p { font-size: 15px; color: var(--gray-500); line-height: 1.9; margin-bottom: 16px; }
.about-text .highlight {
  display: inline-block; padding: 6px 16px; background: var(--blue-pale);
  color: var(--blue); border-radius: 4px; font-size: 14px; font-weight: 500;
  margin-right: 8px; margin-bottom: 8px;
}

/* ========================================
   新闻
   ======================================== */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card {
  background: var(--white); border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-card); transition: all var(--transition);
  border: 1px solid var(--gray-200);
}
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.news-card .news-img { height: 200px; background: var(--gray-100); overflow: hidden; position: relative; }
.news-card .news-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
.news-card:hover .news-img img { transform: scale(1.06); }
.news-card .news-img .date-badge {
  position: absolute; top: 16px; left: 16px; background: var(--red);
  color: white; padding: 6px 14px; border-radius: 4px; font-size: 12px; font-weight: 500;
}
.news-card .news-body { padding: 20px; }
.news-card .news-body h4 {
  font-size: 16px; font-weight: 700; color: var(--gray-900); margin-bottom: 10px;
  line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.news-card .news-body p {
  font-size: 13px; color: var(--gray-500); line-height: 1.7;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}

/* ========================================
   CTA横幅
   ======================================== */
.cta-banner {
  background: linear-gradient(135deg, var(--blue), var(--blue-dark));
  padding: 70px 0; text-align: center; color: white; position: relative; overflow: hidden;
}
.cta-banner::before, .cta-banner::after {
  content: ''; position: absolute; border-radius: 50%; background: rgba(221,33,60,0.1);
}
.cta-banner::before { width: 300px; height: 300px; top: -100px; left: -50px; }
.cta-banner::after { width: 200px; height: 200px; bottom: -60px; right: -30px; }
.cta-banner h2 { font-size: 30px; font-weight: 900; margin-bottom: 16px; position: relative; }
.cta-banner p { font-size: 16px; opacity: 0.8; margin-bottom: 32px; position: relative; }

/* ========================================
   页脚
   ======================================== */
.footer { background: var(--gray-900); color: rgba(255,255,255,0.6); padding: 50px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-col h4 { color: var(--white); font-size: 16px; font-weight: 700; margin-bottom: 20px; }
.footer-col p { font-size: 13px; line-height: 1.8; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 13px; color: rgba(255,255,255,0.5); transition: all var(--transition); }
.footer-col ul li a:hover { color: var(--white); padding-left: 5px; }
.footer-col .contact-item { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; font-size: 13px; }
.footer-col .contact-item svg { width: 18px; height: 18px; fill: var(--red); flex-shrink: 0; }
.footer-col .phone-num { font-size: 22px; font-weight: 700; color: var(--white); font-family: var(--font-num); line-height: 1; }
.footer-bottom { text-align: center; padding: 20px 0; font-size: 12px; color: rgba(255,255,255,0.3); }

/* ========================================
   内页
   ======================================== */
.page-banner {
  min-height: 200px; padding: 60px 0; background: linear-gradient(135deg, var(--blue-dark), var(--blue));
  display: flex; align-items: center; justify-content: center; color: white; text-align: center;
  position: relative; overflow: hidden;
}
.page-banner::before {
  content: ''; position: absolute; width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, rgba(221,33,60,0.1), transparent 70%);
  top: -200px; right: -100px;
}
.page-banner > div { padding: 0 24px; max-width: 800px; width: 100%; }
.page-banner h1 { font-size: 36px; font-weight: 900; letter-spacing: 3px; position: relative; }
.page-banner p { font-size: 14px; opacity: 0.7; margin-top: 10px; position: relative; }
.breadcrumb { padding: 16px 0; background: var(--gray-50); font-size: 13px; color: var(--gray-500); }
.breadcrumb a { color: var(--gray-500); }
.breadcrumb a:hover { color: var(--blue); }
.breadcrumb span { margin: 0 8px; }

/* ========================================
   返回顶部
   ======================================== */
.back-to-top {
  position: fixed; bottom: 30px; right: 30px; width: 46px; height: 46px;
  background: var(--blue); color: white; border: none; border-radius: 50%;
  cursor: pointer; font-size: 18px; display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; transition: all var(--transition); z-index: 999;
  box-shadow: 0 4px 16px rgba(28,38,128,0.3);
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--red); transform: translateY(-3px); }

/* ========================================
   分类筛选
   ======================================== */
.filter-bar { display: flex; justify-content: center; gap: 0; margin-bottom: 40px; flex-wrap: wrap; }
.filter-btn {
  padding: 10px 28px; background: var(--white); border: 1px solid var(--gray-200);
  font-size: 14px; color: var(--gray-500); cursor: pointer; transition: all var(--transition);
  font-family: var(--font); font-weight: 500;
}
.filter-btn:first-child { border-radius: 6px 0 0 6px; }
.filter-btn:last-child { border-radius: 0 6px 6px 0; }
.filter-btn.active, .filter-btn:hover {
  background: var(--blue); color: white; border-color: var(--blue);
}

/* ========================================
   联系我们
   ======================================== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info-card { background: var(--gray-50); border-radius: var(--radius); padding: 40px; }
.contact-info-card h3 { font-size: 22px; font-weight: 700; color: var(--gray-900); margin-bottom: 30px; }
.info-item { display: flex; gap: 16px; margin-bottom: 24px; }
.info-icon {
  width: 48px; height: 48px; background: linear-gradient(135deg, var(--blue), var(--blue-light));
  border-radius: 12px; display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.info-icon svg { width: 22px; height: 22px; fill: white; }
.info-item .info-text h4 { font-size: 14px; color: var(--gray-900); font-weight: 700; margin-bottom: 4px; }
.info-item .info-text p { font-size: 13px; color: var(--gray-500); }
.contact-form-card { background: var(--white); border-radius: var(--radius); padding: 40px; box-shadow: var(--shadow-md); }
.contact-form-card h3 { font-size: 22px; font-weight: 700; color: var(--gray-900); margin-bottom: 30px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 13px; color: var(--gray-700); margin-bottom: 6px; font-weight: 500; }
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: 12px 16px; border: 1.5px solid var(--gray-200); border-radius: var(--radius-sm);
  font-size: 14px; font-family: var(--font); transition: all var(--transition); background: var(--white);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  border-color: var(--blue); outline: none; box-shadow: 0 0 0 3px rgba(28,38,128,0.08);
}
.form-group textarea { min-height: 110px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.map-section { margin-top: 60px; }
.map-placeholder {
  width: 100%; height: 350px; background: var(--gray-100); border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center; color: var(--gray-500);
  border: 2px dashed var(--gray-200);
}

/* 高德地图容器 */
.gaode-map {
  width: 100%;
  height: 450px;
  border-radius: 8px;
  overflow: hidden;
}
.gaode-map-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--gray-400);
  font-size: 14px;
  background: var(--gray-50);
}

/* ========================================
   关于我们页
   ======================================== */
.about-intro { display: flex; gap: 50px; align-items: center; margin-bottom: 70px; }
.about-intro .intro-img { flex: 1; }
.about-intro .intro-img img { border-radius: var(--radius); box-shadow: var(--shadow-lg); width: 100%; }
.about-intro .intro-text { flex: 1; }
.about-intro .intro-text h2 { font-size: 28px; font-weight: 900; color: var(--gray-900); margin-bottom: 20px; }
.about-intro .intro-text p { font-size: 15px; color: var(--gray-500); line-height: 1.9; margin-bottom: 14px; }

.about-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 70px; }
.about-stat-card {
  background: var(--white); border-radius: var(--radius); padding: 32px; text-align: center;
  border: 1px solid var(--gray-200); transition: all var(--transition);
}
.about-stat-card:hover { border-color: var(--blue); box-shadow: var(--shadow-md); }
.about-stat-card .num { font-size: 40px; font-weight: 900; color: var(--blue); font-family: var(--font-num); margin-bottom: 6px; }
.about-stat-card .label { font-size: 14px; color: var(--gray-500); }

.honors-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.honor-card {
  background: var(--white); border-radius: var(--radius); padding: 28px 20px;
  text-align: center; box-shadow: var(--shadow-card); transition: all var(--transition);
  border: 1px solid var(--gray-200);
}
.honor-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--blue-pale); }
.honor-icon {
  width: 56px; height: 56px; margin: 0 auto 14px; border-radius: 50%;
  background: linear-gradient(135deg, var(--blue-pale), var(--white));
  display: flex; align-items: center; justify-content: center;
}
.honor-icon svg { width: 26px; height: 26px; fill: var(--blue); }
.honor-card h4 { font-size: 14px; font-weight: 700; color: var(--gray-900); margin-bottom: 6px; }
.honor-card p { font-size: 12px; color: var(--gray-500); }

/* ========================================
   响应式
   ======================================== */
@media (max-width: 1024px) {
  .products-grid { grid-template-columns: repeat(3, 1fr); }
  .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .about-section .container { flex-direction: column; }
  .about-intro { flex-direction: column; }
  .honors-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .top-bar .slogan { display: none; }
  .menu-toggle { display: block; }
  .nav-menu {
    position: fixed; top: 120px; left: 0; width: 100%; background: var(--white);
    flex-direction: column; box-shadow: var(--shadow-lg);
    transform: translateX(-100%); transition: transform 0.3s ease; z-index: 999;
  }
  .nav-menu.open { transform: translateX(0); }
  .nav-menu > li > a { padding: 14px 24px; border-bottom: 1px solid var(--gray-100); line-height: 1.4; }
  .nav-menu > li > a::after { display: none; }
  .banner-slide .slide-content h2 { font-size: 26px; margin-bottom: 12px; }
  .banner-slide .slide-content .tag { font-size: 13px; padding: 4px 14px; margin-bottom: 12px; }
  .banner-slide .slide-content p { font-size: 13px; margin-bottom: 16px; }
  .banner-dots { bottom: 20px; }
  .banner-tagline { padding: 20px 0; }
  .product-entrance .container { grid-template-columns: 1fr; }
  #coreBusinesses { gap: 16px; }
  .entrance-card { padding: 20px; gap: 16px; }
  .entrance-card .entrance-text h3 { font-size: 18px; margin-bottom: 4px; }
  .entrance-card .entrance-text p { font-size: 13px; }
  .equipment-showcase { grid-template-columns: 1fr; gap: 12px; padding: 0; }
  .products-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .advantages-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .knowledge-list { grid-template-columns: 1fr !important; }
  .contact-grid { grid-template-columns: 1fr; gap: 24px; }
  .contact-info-card, .contact-form-card { padding: 24px; }
  .contact-info-card h3, .contact-form-card h3 { font-size: 18px; margin-bottom: 20px; }
  .info-item { gap: 12px; margin-bottom: 16px; }
  .info-icon { width: 40px; height: 40px; border-radius: 10px; }
  .info-icon svg { width: 18px; height: 18px; }
  .map-section { margin-top: 40px; }
  .gaode-map { height: 300px; }
  #contactPhone { font-size: 18px !important; }
  .about-stats { grid-template-columns: 1fr 1fr; }
  .honors-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 50px 0; }
  .section-header h2 { font-size: 24px; }
  .page-banner { min-height: 140px; padding: 40px 0; }
  .page-banner h1 { font-size: 24px; letter-spacing: 2px; }
  .page-banner p { font-size: 12px; margin-top: 6px; }
  .stat-item .stat-num { font-size: 36px; }
}

@media (max-width: 480px) {
  .products-grid { grid-template-columns: 1fr; }
  .product-entrance .container { gap: 16px; }
  .form-row { grid-template-columns: 1fr; }
  .page-banner { min-height: 110px; padding: 30px 0; }
  .page-banner h1 { font-size: 20px; }
  .page-banner p { font-size: 11px; }
  .entrance-card { padding: 16px; gap: 12px; }
  .entrance-card .entrance-text h3 { font-size: 16px; }
  .entrance-card .entrance-text p { font-size: 12px; }
  .knowledge-list { grid-template-columns: 1fr !important; }
  .contact-info-card, .contact-form-card { padding: 20px; }
  .map-section { margin-top: 30px; }
  .gaode-map { height: 250px; }
  #contactPhone { font-size: 17px !important; }
}

/* ========================================
   首页横幅（Banner下方可编辑横幅）
   ======================================== */
.promo-banner { padding: 0 24px; margin-top: 0; }
.promo-banner .container { max-width: 1200px; margin: 0 auto; }
.promo-banner-item {
  position: relative; border-radius: var(--radius); overflow: hidden;
  height: 140px; cursor: pointer; display: flex; align-items: center;
  background: linear-gradient(135deg, var(--blue), var(--blue-light));
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.promo-banner-bg {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  object-fit: cover; z-index: 0; transition: transform 0.6s ease;
}
.promo-banner-item:hover .promo-banner-bg { transform: scale(1.05); }
.promo-banner-item::after {
  content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  background: linear-gradient(135deg, rgba(28,38,128,0.85), rgba(28,38,128,0.6));
  transition: background 0.4s ease;
}
.promo-banner-item:hover::after {
  background: linear-gradient(135deg, rgba(28,38,128,0.75), rgba(221,33,60,0.5));
}
.promo-banner-content {
  position: relative; z-index: 2; padding: 0 48px; color: white; display: flex;
  align-items: center; justify-content: space-between; width: 100%;
}
.promo-banner-content .promo-text h3 {
  font-size: 22px; font-weight: 900; margin-bottom: 6px; letter-spacing: 1px;
}
.promo-banner-content .promo-text p {
  font-size: 14px; opacity: 0.85; font-weight: 300;
}
.promo-banner-content .promo-btn {
  padding: 10px 28px; background: var(--red); color: white; border-radius: 6px;
  font-size: 14px; font-weight: 500; white-space: nowrap; transition: all 0.3s ease;
  opacity: 0; transform: translateX(20px);
}
.promo-banner-item:hover .promo-btn {
  opacity: 1; transform: translateX(0);
}
.promo-banner-content .promo-btn:hover {
  background: var(--red-light); transform: translateY(-2px);
}

/* ========================================
   知识案例页
   ======================================== */
.knowledge-filter { display: flex; gap: 0; margin-bottom: 40px; justify-content: center; flex-wrap: wrap; }
.knowledge-filter .filter-btn {
  padding: 10px 28px; background: var(--white); border: 1px solid var(--gray-200);
  font-size: 14px; color: var(--gray-500); cursor: pointer; transition: all var(--transition);
  font-family: var(--font); font-weight: 500;
}
.knowledge-filter .filter-btn:first-child { border-radius: 6px 0 0 6px; }
.knowledge-filter .filter-btn:last-child { border-radius: 0 6px 6px 0; }
.knowledge-filter .filter-btn.active,
.knowledge-filter .filter-btn:hover {
  background: var(--blue); color: white; border-color: var(--blue);
}
.knowledge-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.knowledge-card {
  background: var(--white); border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-card); transition: all var(--transition);
  border: 1px solid var(--gray-200); cursor: pointer;
}
.knowledge-card:hover {
  transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent;
}
.knowledge-card .card-img {
  height: 180px; background: var(--gray-100); overflow: hidden; position: relative;
  display: flex; align-items: center; justify-content: center;
}
.knowledge-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
.knowledge-card:hover .card-img img { transform: scale(1.06); }
.knowledge-card .card-img .category-badge {
  position: absolute; top: 12px; left: 12px; padding: 4px 12px;
  background: var(--red); color: white; border-radius: 4px; font-size: 12px; font-weight: 500;
}
.knowledge-card .card-body { padding: 20px; }
.knowledge-card .card-body h3 {
  font-size: 16px; font-weight: 700; color: var(--gray-900); margin-bottom: 10px;
  line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.knowledge-card .card-body p {
  font-size: 13px; color: var(--gray-500); line-height: 1.7; margin-bottom: 12px;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.knowledge-card .card-meta {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 12px; color: var(--gray-300);
}
.knowledge-card .card-meta .date { display: flex; align-items: center; gap: 4px; }
.knowledge-card .card-meta .read-more { color: var(--blue); font-weight: 500; transition: color 0.3s; }
.knowledge-card:hover .card-meta .read-more { color: var(--red); }

/* 文章详情区（内嵌在列表页下方或作为展开内容） */
.article-content { max-width: 800px; margin: 0 auto; }
.article-content h1 { font-size: 28px; font-weight: 900; color: var(--gray-900); margin-bottom: 16px; line-height: 1.4; }
.article-content .article-meta { font-size: 13px; color: var(--gray-500); margin-bottom: 30px; display: flex; gap: 20px; }
.article-content .article-body { font-size: 15px; color: var(--gray-700); line-height: 2; }
.article-content .article-body p { margin-bottom: 16px; }
.article-content .article-body h2 { font-size: 20px; font-weight: 700; color: var(--gray-900); margin: 30px 0 16px; }
.article-content .article-body h3 { font-size: 17px; font-weight: 700; color: var(--gray-900); margin: 24px 0 12px; }
.article-content .article-tags { margin-top: 30px; display: flex; gap: 8px; flex-wrap: wrap; }
.article-content .article-tags span {
  padding: 4px 14px; background: var(--blue-pale); color: var(--blue);
  border-radius: 4px; font-size: 12px; font-weight: 500;
}

/* ========================================
   设计优化 - 产品卡片光效
   ======================================== */
.product-card::after {
  content: ''; position: absolute; top: 0; left: -75%; width: 50%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
  transform: skewX(-25deg); transition: left 0.6s ease; pointer-events: none;
}
.product-card { position: relative; overflow: hidden; }
.product-card:hover::after { left: 125%; }

/* 侧边浮动联系按钮 */
.float-contact {
  position: fixed; right: 20px; bottom: 100px; z-index: 998;
  display: flex; flex-direction: column; gap: 10px;
}
.float-contact a {
  width: 48px; height: 48px; border-radius: 50%; display: flex; align-items: center;
  justify-content: center; color: white; transition: all 0.3s ease; box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}
.float-contact a:hover { transform: scale(1.1); }
.float-contact .phone-btn { background: var(--red); }
.float-contact .wechat-btn { background: #07c160; }

/* 使用说明页 */
.video-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(360px, 1fr)); gap: 30px; }
.video-card { background: var(--white); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-card); border: 1px solid var(--gray-200); transition: all var(--transition); }
.video-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.video-player { position: relative; width: 100%; aspect-ratio: 16 / 9; background: var(--gray-100); }
.video-player iframe { width: 100%; height: 100%; }
.video-placeholder { display: flex; flex-direction: column; align-items: center; justify-content: center; height: 100%; color: var(--gray-400); gap: 12px; }
.video-info { padding: 20px; }
.video-info h3 { font-size: 16px; font-weight: 700; color: var(--gray-900); margin-bottom: 8px; }
.video-info p { font-size: 13px; color: var(--gray-500); line-height: 1.7; }
.video-tips { max-width: 800px; margin: 0 auto; }
.video-tips p { font-size: 14px; color: var(--gray-600); line-height: 2; margin-bottom: 12px; padding-left: 20px; border-left: 3px solid var(--blue-pale); }

.equip-link { position: absolute; top: 0; left: 0; width: 100%; height: 100%; text-decoration: none; color: inherit; z-index: 1; }
.equip-link .equip-placeholder, .equip-link .equip-overlay { position: absolute; }
.equip-link .equip-placeholder { top: 50%; left: 50%; transform: translate(-50%, -50%); z-index: 1; text-align: center; }
.equip-link .equip-overlay { bottom: 0; left: 0; width: 100%; padding: 20px; z-index: 3; }

/* ========================================
   社交媒体二维码
   ======================================== */
.qr-section { background: var(--gray-50); }
.qr-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; max-width: 800px; margin: 0 auto; }
.qr-card {
  background: var(--white); border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-card); border: 1px solid var(--gray-200);
  transition: all var(--transition); text-align: center;
}
.qr-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.qr-img {
  width: 200px; height: 200px; margin: 30px auto 0;
  background: var(--gray-50); border-radius: 12px; overflow: hidden;
  display: flex; align-items: center; justify-content: center; border: 1px solid var(--gray-200);
}
.qr-img img { width: 100%; height: 100%; object-fit: contain; }
.qr-placeholder { text-align: center; color: var(--gray-400); }
.qr-placeholder p { font-size: 13px; margin-top: 8px; font-weight: 500; }
.qr-info { padding: 20px; }
.qr-info h4 { font-size: 16px; font-weight: 700; color: var(--gray-900); margin-bottom: 6px; }
.qr-info p { font-size: 13px; color: var(--gray-500); line-height: 1.6; }

/* 关于我们统计数字单位 */
.about-stat-card .stat-unit { font-size: 16px; font-weight: 700; color: var(--blue); font-family: var(--font-num); }

/* 关于我们 - 联系方式 */
.about-contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.about-contact-item {
  background: var(--white); border-radius: var(--radius); padding: 28px;
  box-shadow: var(--shadow-card); border: 1px solid var(--gray-200);
  display: flex; gap: 16px; align-items: flex-start; transition: all var(--transition);
}
.about-contact-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.about-contact-icon {
  width: 48px; height: 48px; min-width: 48px; border-radius: 12px;
  background: var(--blue-pale); display: flex; align-items: center; justify-content: center;
}
.about-contact-icon svg { width: 24px; height: 24px; fill: var(--blue); }
.about-contact-item h4 { font-size: 15px; font-weight: 700; color: var(--gray-900); margin-bottom: 6px; }
.about-contact-item p { font-size: 14px; color: var(--gray-600); margin-bottom: 4px; word-break: break-all; }
.about-contact-item span { font-size: 12px; color: var(--gray-400); }

@media (max-width: 768px) {
  .about-contact-grid { grid-template-columns: 1fr; }
}

/* ========================================
   产品详情页
   ======================================== */
.product-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: start; }
.product-detail-img { border-radius: var(--radius); overflow: hidden; background: transparent; }
.product-detail-img img { width: 100%; height: auto; }
.product-detail-info h1 { font-size: 32px; color: var(--gray-900); margin-bottom: 8px; line-height: 1.3; }
.product-detail-info .subtitle { font-size: 16px; color: var(--gray-500); margin-bottom: 20px; }
.product-detail-info .desc { font-size: 15px; line-height: 1.8; color: var(--gray-700); margin-bottom: 24px; }
.product-detail-info .desc h2 { font-size: 20px; font-weight: 700; color: var(--gray-900); margin: 28px 0 10px; }
.product-detail-info .desc h3 { font-size: 17px; font-weight: 700; color: var(--gray-900); margin: 22px 0 8px; }
.spec-table { width: 100%; border-collapse: collapse; margin-bottom: 24px; }
.spec-table th, .spec-table td { padding: 12px 16px; border: 1px solid var(--gray-200); font-size: 14px; text-align: left; }
.spec-table th { background: var(--gray-50); color: var(--gray-900); font-weight: 500; width: 30%; white-space: nowrap; }
.spec-table td { color: var(--gray-700); }
.spec-table tr:hover { background: var(--gray-50); }

@media (max-width: 768px) {
  .product-detail { grid-template-columns: 1fr; gap: 30px; }
  .product-detail-info h1 { font-size: 24px; text-align: center; }
  .product-detail-info .subtitle { text-align: center; }
  .product-detail .desc { text-align: left; }
  .spec-table th { width: 35%; font-size: 13px; }
  .spec-table td { font-size: 13px; }
}

@media (max-width: 768px) {
  .qr-grid { grid-template-columns: 1fr; max-width: 300px; }
  .qr-img { width: 160px; height: 160px; }
}