/* ===== 跨浏览器兼容性补充 ===== */
/* IE11+ / Edge / Firefox / Safari / Chrome 全适配 */

/* 1. 统一 box-sizing（兼容旧版 Firefox） */
*,
*::before,
*::after {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}

/* 2. 统一 tap-highlight（移动端 Safari/Chrome） */
a, button, input, select, textarea {
  -webkit-tap-highlight-color: transparent;
}

/* 3. 禁止 iOS 自动放大字体 */
html {
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

/* 4. 统一滚动条样式（Chrome/Safari） */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: #f0f5ff; }
::-webkit-scrollbar-thumb { background: #a0b4d6; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #1659d4; }

/* 5. input / button 统一跨浏览器外观 */
input, button, select, textarea {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  font-family: inherit;
}

/* 6. 图片在 IE / Edge 不拉伸 */
img { -ms-interpolation-mode: bicubic; }

/* 7. flex/grid 旧版前缀兜底（IE10+） */
.flex-row {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
}

/* 8. 动画前缀（Safari 旧版） */
@-webkit-keyframes fadeInUp {
  from { opacity: 0; -webkit-transform: translateY(20px); transform: translateY(20px); }
  to   { opacity: 1; -webkit-transform: translateY(0); transform: translateY(0); }
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* 9. 文字渐变兼容（Safari 需要 -webkit-background-clip） */
.gradient-text {
  background: linear-gradient(135deg, #1659d4, #06b6d4);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* 10. position: sticky 兼容 Safari */
.navbar,
.product-nav-wrap {
  position: -webkit-sticky;
  position: sticky;
}

/* ===== 全局基础样式 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #1659d4;
  --primary-dark: #0d3fa0;
  --accent: #f5c518;
  --text-dark: #1a2340;
  --text-gray: #6b7280;
  --text-light: #fff;
  --bg-light: #f0f5ff;
  --bg-section: #f7f9fc;
  --border: #e0e8f5;
  --shadow: 0 4px 24px rgba(22,89,212,0.10);
  --radius: 10px;
  --transition: .3s ease;
}

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

body {
  font-family: 'PingFang SC','Microsoft YaHei',sans-serif;
  color: var(--text-dark);
  background: #fff;
  min-width: 320px;
}

a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-title {
  text-align: center;
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.section-sub {
  text-align: center;
  font-size: .85rem;
  letter-spacing: .15em;
  color: var(--text-gray);
  text-transform: uppercase;
  margin-bottom: 40px;
}

.section-divider {
  width: 48px; height: 3px;
  background: var(--primary);
  margin: 10px auto 12px;
  border-radius: 2px;
}

/* ===== 导航栏 ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.97);
  box-shadow: 0 2px 12px rgba(22,89,212,0.08);
  height: 64px;
  display: flex; align-items: center;
}

.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px;
}

.nav-logo {
  display: flex; align-items: center;
}

.nav-logo .logo-img {
  height: 42px;
  width: auto;
  display: block;
}

.nav-menu {
  display: flex; align-items: center; gap: 4px;
}

.nav-menu > li {
  position: relative;
}

.nav-menu > li > a {
  display: flex; align-items: center; gap: 4px;
  padding: 8px 14px;
  font-size: .9rem; font-weight: 500;
  color: var(--text-dark);
  border-radius: 6px;
  transition: var(--transition);
}

.nav-menu > li > a:hover,
.nav-menu > li > a.active {
  color: var(--primary);
  background: var(--bg-light);
}

.nav-menu > li > a.active {
  border-bottom: 2px solid var(--primary);
  border-radius: 6px 6px 0 0;
}

.nav-dropdown {
  display: none;
  position: absolute; top: 100%; left: 0;
  min-width: 180px;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 8px 32px rgba(22,89,212,0.13);
  padding: 8px 0;
  z-index: 100;
}

.nav-menu > li:hover .nav-dropdown { display: block; }

.nav-dropdown li a {
  display: block; padding: 10px 20px;
  font-size: .88rem; color: var(--text-dark);
  transition: var(--transition);
}

.nav-dropdown li a:hover { background: var(--bg-light); color: var(--primary); }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px; cursor: pointer;
  background: none; border: none; padding: 4px;
}

.nav-toggle span {
  display: block; width: 24px; height: 2px;
  background: var(--text-dark); border-radius: 2px;
  transition: var(--transition);
}

/* ===== 轮播Banner ===== */
.hero-slider {
  position: relative; margin-top: 64px;
  overflow: hidden; height: 560px;
}

@media (max-width: 768px) { .hero-slider { height: 300px; } }

.slide {
  position: absolute; inset: 0;
  display: flex; align-items: center;
  opacity: 0; transition: opacity .8s ease;
  background-size: cover; background-position: center;
}

.slide.active { opacity: 1; z-index: 2; }

.slide-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(8,20,60,0.72) 0%, rgba(8,20,60,0.35) 60%, transparent 100%);
}

.slide-bg-1 { background: linear-gradient(135deg,#030b2e 0%,#0d2060 40%,#1a3a8f 70%,#0d5cb3 100%); }
.slide-bg-2 { background: linear-gradient(135deg,#050e24 0%,#0d1d50 40%,#1a306e 70%,#1050a0 100%); }
.slide-bg-3 { background: linear-gradient(135deg,#02081a 0%,#0a1840 40%,#162d6e 70%,#0a4a9e 100%); }
.slide-bg-4 { background: linear-gradient(135deg,#030d22 0%,#0b1e50 40%,#1a3070 70%,#0b50a0 100%); }

/* 粒子装饰 */
.slide-particles {
  position: absolute; inset: 0; overflow: hidden;
}
.slide-particles::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle 2px at 20% 30%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(circle 1.5px at 50% 60%, rgba(255,255,255,0.4) 0%, transparent 100%),
    radial-gradient(circle 2px at 80% 20%, rgba(100,200,255,0.5) 0%, transparent 100%),
    radial-gradient(circle 1px at 70% 80%, rgba(255,255,255,0.3) 0%, transparent 100%);
}

.slide-content {
  position: relative; z-index: 5;
  padding: 0 48px;
  max-width: 700px;
}

.slide-content .tag {
  display: inline-block;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.25);
  color: #fff; font-size: .8rem;
  padding: 4px 14px; border-radius: 20px; margin-bottom: 18px;
  backdrop-filter: blur(6px);
}

.slide-content h1 {
  font-size: clamp(1.6rem, 4vw, 2.8rem);
  font-weight: 800; color: #fff; line-height: 1.3;
  margin-bottom: 16px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.3);
}

.slide-content h1 em {
  font-style: normal;
  color: var(--accent);
}

.slide-content p {
  font-size: clamp(.8rem, 1.5vw, .95rem);
  color: rgba(255,255,255,0.82);
  line-height: 2;
  margin-bottom: 28px;
}

.slide-content p span {
  display: inline-block;
  padding: 2px 10px; margin: 2px 4px;
  background: rgba(255,255,255,0.12);
  border-radius: 4px; font-size: .82rem;
  border: 1px solid rgba(255,255,255,0.2);
}

.slide-btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--primary);
  color: #fff; padding: 11px 28px;
  border-radius: 6px; font-size: .9rem; font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 4px 16px rgba(22,89,212,0.4);
}

.slide-btn:hover { background: var(--primary-dark); transform: translateY(-2px); }

.slide-nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  z-index: 10; width: 40px; height: 40px;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 50%; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1rem;
  transition: var(--transition);
  backdrop-filter: blur(4px);
}

.slide-nav:hover { background: rgba(255,255,255,0.3); }
.slide-nav.prev { left: 20px; }
.slide-nav.next { right: 20px; }

.slide-dots {
  position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%);
  z-index: 10; display: flex; gap: 8px;
}

.slide-dots span {
  width: 8px; height: 8px; border-radius: 4px;
  background: rgba(255,255,255,0.4);
  cursor: pointer; transition: var(--transition);
}

.slide-dots span.active {
  background: #fff; width: 24px;
}

/* ===== 统计数字条 ===== */
.stats-bar {
  background: #fff;
  box-shadow: var(--shadow);
  padding: 28px 0;
  position: relative; z-index: 5;
}

.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 0; text-align: center;
}

.stats-grid .stat-item {
  padding: 10px 20px;
  border-right: 1px solid var(--border);
}

.stats-grid .stat-item:last-child { border-right: none; }

.stat-num {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800; color: var(--primary);
  line-height: 1.1;
}

.stat-num sup { font-size: 1rem; font-weight: 700; }

.stat-label {
  font-size: .8rem; color: var(--text-gray);
  margin-top: 4px;
}

/* ===== 关于我们 ===== */
.about-section {
  padding: 72px 0;
  background: linear-gradient(180deg, #fff 0%, var(--bg-light) 100%);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-text .about-en {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  color: rgba(22,89,212,0.08);
  letter-spacing: .05em;
  line-height: 1;
  margin-bottom: -10px;
}

.about-text h2 {
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 800; color: var(--text-dark);
  margin-bottom: 16px;
}

.about-divider {
  width: 40px; height: 3px;
  background: var(--primary); border-radius: 2px;
  margin-bottom: 20px;
}

.about-text p {
  font-size: .9rem; line-height: 1.9;
  color: var(--text-gray);
  margin-bottom: 12px;
}

.about-more {
  display: inline-flex; align-items: center; gap: 8px;
  width: 36px; height: 36px;
  border: 1.5px solid var(--primary);
  border-radius: 50%;
  color: var(--primary);
  margin-top: 16px;
  transition: var(--transition);
  justify-content: center;
}

.about-more:hover { background: var(--primary); color: #fff; }

.about-visual {
  position: relative;
  display: flex; align-items: center; justify-content: center;
}

.aiot-diagram {
  width: 100%; max-width: 400px;
  background: linear-gradient(135deg, #e8f0fe, #dbeafe);
  border-radius: 50%;
  aspect-ratio: 1;
  display: flex; align-items: center; justify-content: center;
  position: relative;
  box-shadow: 0 8px 40px rgba(22,89,212,0.15);
}

.aiot-center {
  background: linear-gradient(135deg, var(--primary), #0dcaf0);
  color: #fff; text-align: center;
  width: 130px; height: 130px;
  border-radius: 50%;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  font-weight: 700; font-size: .85rem;
  box-shadow: 0 4px 20px rgba(22,89,212,0.4);
  z-index: 2; position: relative;
}

.aiot-center .main-text { font-size: 1.1rem; font-weight: 900; }

.aiot-nodes {
  position: absolute; inset: 0;
  border-radius: 50%;
}

.aiot-node {
  position: absolute;
  width: 86px; height: 86px;
  background: linear-gradient(135deg, #fff, var(--bg-light));
  border-radius: 50%;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  font-size: .88rem; font-weight: 700; color: var(--primary);
  box-shadow: 0 4px 16px rgba(22,89,212,0.15);
  border: 2px solid rgba(22,89,212,0.12);
  text-align: center; line-height: 1.4;
}

.aiot-node:nth-child(1) { top: -10px; left: 50%; transform: translateX(-50%); }
.aiot-node:nth-child(2) { top: 15%; right: -10px; }
.aiot-node:nth-child(3) { bottom: 15%; right: -10px; }
.aiot-node:nth-child(4) { bottom: -10px; left: 50%; transform: translateX(-50%); }
.aiot-node:nth-child(5) { bottom: 15%; left: -10px; }
.aiot-node:nth-child(6) { top: 15%; left: -10px; }

/* ===== 解决方案入口 ===== */
.solutions-nav {
  padding: 0 0 64px;
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.sol-card {
  position: relative; overflow: hidden;
  border-radius: var(--radius);
  height: 200px;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 24px rgba(0,0,0,0.4);
}

.sol-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 40px rgba(0,80,220,0.4);
}

.sol-card .sol-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  transition: transform .7s ease;
}

.sol-card:hover .sol-bg { transform: scale(1.06); }



/* 底部渐变遮罩 */
.sol-card .sol-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(
    175deg,
    rgba(2,10,40,0.15) 0%,
    rgba(4,15,60,0.45) 40%,
    rgba(2,8,35,0.82) 75%,
    rgba(1,5,22,0.95) 100%
  );
  transition: opacity .4s;
}
.sol-ov-3 {
  background: linear-gradient(
    175deg,
    rgba(20,8,0,0.15) 0%,
    rgba(40,18,0,0.45) 40%,
    rgba(20,8,0,0.82) 75%,
    rgba(8,3,0,0.95) 100%
  );
}

.sol-card:hover .sol-overlay { opacity: 0.9; }

/* 卡片内容：标题居中 */
.sol-card .sol-content {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  justify-content: center;
  padding: 0 20px;
  color: #fff;
}

/* 标题前的彩色短线装饰 */
.sol-title-bar {
  width: 30px; height: 3px; border-radius: 2px;
  background: linear-gradient(90deg, #00d4ff, #0077ff);
  margin-bottom: 10px;
}
.sol-card:nth-child(3) .sol-title-bar { background: linear-gradient(90deg,#ff8c00,#ffcc00); }

.sol-card .sol-title {
  font-size: 1.22rem;
  font-weight: 800;
  letter-spacing: .04em;
  line-height: 1.3;
  margin-bottom: 14px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.9);
  color: #fff;
}

.sol-card .sol-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: .78rem; color: rgba(255,255,255,0.9);
  border: 1px solid rgba(255,255,255,0.4);
  padding: 5px 14px; border-radius: 20px;
  backdrop-filter: blur(6px);
  transition: var(--transition);
  background: rgba(255,255,255,0.1);
  width: fit-content;
}

.sol-card:hover .sol-link {
  background: rgba(0,180,255,0.25);
  border-color: rgba(0,220,255,0.7);
  color: #fff;
  box-shadow: 0 0 12px rgba(0,180,255,0.4);
}
.sol-card:nth-child(3):hover .sol-link {
  background: rgba(255,140,0,0.25);
  border-color: rgba(255,180,0,0.7);
  box-shadow: 0 0 12px rgba(255,140,0,0.4);
}

.sol-bg-1 { background: #0c1e5a; }
.sol-bg-2 { background: #050f2e; }
.sol-bg-3 { background: #0a0500; }
.sol-bg-4 { background: #050e30; }

/* ===== 产品与服务 ===== */
.products-section {
  padding: 72px 0;
  background: linear-gradient(180deg, var(--bg-light) 0%, #fff 100%);
}

.prod-tabs {
  display: flex; justify-content: center; gap: 0;
  margin-bottom: 40px;
  border-bottom: 2px solid var(--border);
}

.prod-tab {
  padding: 10px 36px;
  font-size: .95rem; font-weight: 600;
  color: var(--text-gray);
  cursor: pointer; border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: var(--transition);
}

.prod-tab.active { color: var(--primary); border-bottom-color: var(--primary); }
.prod-tab:hover { color: var(--primary); }

.prod-panel { display: none; }
.prod-panel.active { display: block; }

/* 软件产品 */
.software-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.sw-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: var(--transition);
  position: relative; overflow: hidden;
}

.sw-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--primary), #0dcaf0);
}

.sw-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(22,89,212,0.16); }

.sw-card-icon {
  width: 52px; height: 52px; border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), #1a8ef0);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1.4rem; margin-bottom: 16px;
  font-weight: 900;
}

.sw-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 6px; }
.sw-card .sw-en { font-size: .72rem; color: var(--text-gray); margin-bottom: 10px; letter-spacing:.05em; }
.sw-card p { font-size: .82rem; color: var(--text-gray); line-height: 1.7; }

/* 硬件产品 */
.hardware-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px;
}

.hw-card {
  display: flex; gap: 20px;
  background: #fff; border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: var(--transition);
  align-items: center;
}

.hw-card:hover { transform: translateY(-3px); box-shadow: 0 10px 36px rgba(22,89,212,0.15); }

.hw-img {
  width: 100px; height: 80px; border-radius: 8px;
  background: linear-gradient(135deg, #e8f0fe, #dbeafe);
  display: flex; align-items: center; justify-content: center;
  font-size: 2.5rem; flex-shrink: 0;
}

.hw-info h3 { font-size: .95rem; font-weight: 700; margin-bottom: 6px; }
.hw-info p { font-size: .82rem; color: var(--text-gray); line-height: 1.7; }

/* 服务 */
.service-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}

.svc-card {
  background: linear-gradient(135deg, var(--primary), #1a6ef0);
  border-radius: var(--radius);
  padding: 28px 20px; color: #fff; text-align: center;
  transition: var(--transition); cursor: pointer;
}

.svc-card:nth-child(2) { background: linear-gradient(135deg, #6b21a8, #9333ea); }
.svc-card:nth-child(3) { background: linear-gradient(135deg, #0d7a5a, #10b981); }
.svc-card:nth-child(4) { background: linear-gradient(135deg, #0d5282, #0891b2); }

.svc-card:hover { transform: translateY(-4px) scale(1.02); box-shadow: 0 12px 36px rgba(0,0,0,0.2); }

.svc-icon { font-size: 2rem; margin-bottom: 14px; }
.svc-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.svc-card p { font-size: .8rem; opacity: .88; line-height: 1.6; }

.prod-more-btn {
  display: flex; justify-content: center; margin-top: 36px;
}

.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--primary); color: #fff;
  padding: 11px 32px; border-radius: 6px;
  font-size: .9rem; font-weight: 600;
  transition: var(--transition);
  border: none; cursor: pointer;
}

.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); }

.btn-outline {
  display: inline-flex; align-items: center; gap: 8px;
  background: transparent; color: var(--primary);
  padding: 10px 28px; border-radius: 6px;
  font-size: .9rem; font-weight: 600;
  border: 1.5px solid var(--primary);
  transition: var(--transition); cursor: pointer;
}

.btn-outline:hover { background: var(--primary); color: #fff; }

/* ===== 典型案例 ===== */
.cases-section {
  padding: 72px 0;
  background: var(--bg-section);
}

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

.case-card {
  position: relative; border-radius: var(--radius);
  overflow: hidden; cursor: pointer;
  transition: var(--transition);
  height: 140px;
}

.case-card:hover { transform: translateY(-4px); box-shadow: 0 12px 36px rgba(22,89,212,0.18); }

.case-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  transition: transform .5s ease;
}

.case-card:hover .case-bg { transform: scale(1.05); }

.case-bg-1 { background-image: url('images/园区.png'); }
.case-bg-2 { background-image: url('images/AI应用落地.png'); }
.case-bg-3 { background-image: url('images/监所.png'); }
.case-bg-4 { background-image: url('images/管网.png'); }
.case-bg-5 { background-image: url('images/机场.png'); }
.case-bg-6 { background-image: url('images/中央名族大学.png'); }

.case-label {
  position: absolute; bottom: 0; left: 0; right: 0;
  background: linear-gradient(180deg, transparent 0%, rgba(8,20,60,0.65) 60%, rgba(8,20,60,0.85) 100%);
  color: #fff; padding: 50px 18px 14px;
  display: flex; align-items: center; justify-content: space-between;
}

.case-label span { font-size: .95rem; font-weight: 700; letter-spacing: .02em; }
.case-label .arrow { opacity: .85; font-size: .9rem; }

/* ===== 生态合作伙伴 ===== */
.partners-section {
  padding: 64px 0;
  background: #fff;
}

.partners-track-wrap {
  overflow: hidden; position: relative;
}

.partners-track {
  display: flex; gap: 32px;
  animation: scroll-left 20s linear infinite;
  width: max-content;
}

.partners-track:hover { animation-play-state: paused; }

@keyframes scroll-left {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.partner-logo {
  flex-shrink: 0;
  width: 200px; height: 90px;
  background: #fff;
  border: 1.5px solid var(--border);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 1.2rem;
  color: var(--text-dark);
  transition: var(--transition);
  padding: 12px 20px;
}

.partner-logo:hover { border-color: var(--primary); box-shadow: 0 4px 16px rgba(22,89,212,0.12); }

/* ===== AI助手悬浮按钮 ===== */
.ai-float {
  position: fixed; right: 20px; bottom: 100px;
  z-index: 500;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
}

.ai-float-phone {
  background: var(--primary); color: #fff;
  border-radius: 10px; padding: 10px 12px;
  text-align: center; font-size: .72rem;
  font-weight: 600; box-shadow: var(--shadow);
  white-space: nowrap;
}

.ai-float-btn {
  width: 52px; height: 52px;
  background: var(--primary); color: #fff;
  border-radius: 12px;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  font-size: .65rem; gap: 2px;
  box-shadow: 0 4px 20px rgba(22,89,212,0.4);
  cursor: pointer; transition: var(--transition);
}

.ai-float-btn:hover { background: var(--primary-dark); transform: scale(1.05); }
.ai-float-btn .ai-icon { font-size: 1.3rem; }

/* ===== 页脚 ===== */
.footer {
  background: #1a2340;
  color: rgba(255,255,255,0.85);
}

.footer-main {
  padding: 48px 0 32px;
  display: grid;
  grid-template-columns: 1.6fr 1fr auto;
  gap: 48px;
  align-items: start;
}

.footer-brand h3 { color: #fff; font-size: 1.15rem; font-weight: 800; margin-bottom: 16px; }

.footer-contact-item {
  display: flex; gap: 10px; align-items: flex-start;
  font-size: .82rem; margin-bottom: 8px;
}

.footer-contact-item .icon { font-size: 1rem; margin-top: 2px; flex-shrink: 0; }
.footer-contact-item .label { color: rgba(255,255,255,0.55); font-size: .75rem; }
.footer-contact-item .val { color: rgba(255,255,255,0.9); font-size: .88rem; font-weight: 600; }

.footer-col h4 { color: #fff; font-size: .9rem; font-weight: 700; margin-bottom: 14px; }

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

.footer-col ul li a {
  font-size: .82rem; color: rgba(255,255,255,0.6);
  transition: var(--transition);
}

.footer-col ul li a:hover { color: #fff; }

.footer-qr {
  width: 90px; height: 90px;
  background: #fff; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: .72rem; color: #333; text-align: center;
  padding: 8px;
}

.footer-qr-label { font-size: .75rem; color: rgba(255,255,255,0.6); margin-top: 8px; text-align: center; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 16px 0;
  display: flex; align-items: center; justify-content: space-between;
  font-size: .78rem; color: rgba(255,255,255,0.4);
}

/* ===== 内页通用 Banner ===== */
.inner-banner {
  height: 280px;
  background: linear-gradient(135deg, #e8f0fe 0%, #dbeafe 50%, #bfdbfe 100%);
  display: flex; align-items: center;
  margin-top: 64px;
  position: relative; overflow: hidden;
}

.inner-banner::after {
  content: '';
  position: absolute; right: 0; top: 0; bottom: 0; width: 55%;
  background: linear-gradient(135deg, transparent, rgba(22,89,212,0.05));
}

.inner-banner-content { position: relative; z-index: 2; }
.inner-banner h1 { font-size: clamp(1.6rem,4vw,2.4rem); font-weight: 800; color: var(--text-dark); margin-bottom: 10px; }
.inner-banner p { font-size: .9rem; color: var(--text-gray); }

/* ===== 面包屑导航 ===== */
.breadcrumb {
  background: #fff; border-bottom: 1px solid var(--border);
}

.breadcrumb-inner {
  max-width: 1200px; margin: 0 auto; padding: 12px 24px;
  display: flex; align-items: center; justify-content: space-between;
}

.breadcrumb-tabs {
  display: flex; gap: 0;
}

.bc-tab {
  padding: 8px 24px;
  font-size: .9rem; font-weight: 600; cursor: pointer;
  color: var(--text-dark);
  border-bottom: 2px solid transparent;
  transition: var(--transition);
}

.bc-tab.active { color: #fff; background: var(--primary); border-radius: 4px; }

.bc-nav {
  display: flex; align-items: center; gap: 6px;
  font-size: .8rem; color: var(--text-gray);
}

.bc-nav a { color: var(--text-gray); }
.bc-nav a:hover { color: var(--primary); }

/* ===== 客户案例页 ===== */
.industry-section { padding: 64px 0; }

.industry-layout {
  display: flex; justify-content: center; align-items: center;
}

.industry-list {
  display: grid; grid-template-columns: repeat(6, 1fr);
  gap: 16px;
  max-width: 1100px;
}

.ind-item {
  background: #fff; border: 1.5px solid var(--border);
  border-radius: var(--radius); padding: 24px 16px;
  text-align: center; cursor: pointer;
  transition: var(--transition);
  min-width: 140px;
}

.ind-item:hover, .ind-item.active {
  border-color: var(--primary);
  background: var(--bg-light);
  color: var(--primary);
}

.ind-icon { font-size: 2.2rem; margin-bottom: 10px; }
.ind-item span { font-size: 1rem; font-weight: 600; }

.industry-photos {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px;
}

.ind-photo {
  border-radius: 8px; overflow: hidden;
  aspect-ratio: 4/3;
}

.ind-photo-bg {
  width: 100%; height: 100%;
  background-size: cover; background-position: center;
  transition: transform .4s ease;
}

.ind-photo:hover .ind-photo-bg { transform: scale(1.06); }

.ind-bg-1 { background: linear-gradient(135deg, #1a3a70, #2d6aae); }
.ind-bg-2 { background: linear-gradient(135deg, #1a4020, #2d7040); }
.ind-bg-3 { background: linear-gradient(135deg, #3a1a00, #7a4010); }
.ind-bg-4 { background: linear-gradient(135deg, #0d2040, #1a4080); }
.ind-bg-5 { background: linear-gradient(135deg, #2a0a40, #5a1a80); }
.ind-bg-6 { background: linear-gradient(135deg, #0a2a30, #1a5060); }
.ind-bg-7 { background: linear-gradient(135deg, #2a2000, #5a4010); }
.ind-bg-8 { background: linear-gradient(135deg, #1a0a30, #3a1a60); }
.ind-bg-9 { background: linear-gradient(135deg, #001a30, #003a60); }

/* 案例合集标签 */
.case-collection-section { padding: 64px 0; background: var(--bg-section); }

.case-tags {
  display: flex; flex-wrap: wrap; gap: 12px; justify-content: center;
}

.case-tag {
  display: flex; align-items: center; gap: 8px;
  background: #fff; border: 1px solid var(--border);
  border-radius: 6px; padding: 8px 16px;
  font-size: .85rem; color: var(--text-dark);
  cursor: pointer; transition: var(--transition);
}

.case-tag::before {
  content: '◈'; color: var(--primary); font-size: .7rem;
}

.case-tag:hover { border-color: var(--primary); color: var(--primary); background: var(--bg-light); }

/* 经典案例列表 */
.classic-case {
  margin-bottom: 40px; padding-bottom: 40px;
  border-bottom: 1px solid var(--border);
}

.case-num {
  font-size: 1.3rem; font-weight: 900;
  color: var(--primary); opacity: .25;
  margin-bottom: 16px;
  font-style: italic;
}

.case-detail {
  display: grid; grid-template-columns: 320px 1fr; gap: 36px; align-items: start;
}

.case-thumb {
  border-radius: var(--radius); overflow: hidden;
  position: relative;
}

.case-thumb-img {
  width: 100%; height: 220px;
  background-size: cover; background-position: center;
}

.case-thumb-label {
  position: absolute; bottom: 0; left: 0; right: 0;
  background: linear-gradient(180deg,transparent,rgba(22,89,212,0.85));
  color: #fff; padding: 24px 16px 14px;
  font-weight: 700;
}

.case-info h3 {
  font-size: 1.1rem; font-weight: 800; color: var(--text-dark); margin-bottom: 8px;
}

.case-tags-small {
  display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px;
}

.case-tag-sm {
  background: var(--bg-light); color: var(--primary);
  padding: 4px 12px; border-radius: 4px; font-size: .78rem;
  border: 1px solid rgba(22,89,212,0.2);
}

.case-info-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 20px;
}

.case-info-box {
  background: var(--bg-section); border-radius: 8px; padding: 20px;
}

.case-info-box h4 {
  font-size: .88rem; font-weight: 700; color: var(--primary); margin-bottom: 10px;
}

.case-info-box p {
  font-size: .82rem; color: var(--text-gray); line-height: 1.8;
}

/* ===== 关于我们页 ===== */
.company-intro-section { padding: 64px 0; }

.company-intro-grid {
  display: grid; grid-template-columns: 340px 1fr; gap: 48px; align-items: start;
}

.company-photo {
  border-radius: var(--radius); overflow: hidden;
  height: 240px; background: linear-gradient(135deg, #e8f0fe, #bfdbfe);
  display: flex; align-items: center; justify-content: center;
  font-size: 4rem;
}

.company-text h2 { font-size: 1.4rem; font-weight: 800; margin-bottom: 16px; }
.company-text p { font-size: .88rem; color: var(--text-gray); line-height: 1.9; margin-bottom: 12px; }

/* 业务范围 */
.business-section {
  padding: 64px 0;
  background: linear-gradient(135deg, #1659d4, #0d3fa0);
  position: relative; overflow: hidden;
}

.business-section::before {
  content: '';
  position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E") repeat;
}

.business-layout {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center;
  position: relative; z-index: 2;
}

.china-map {
  width: 100%; max-width: 360px;
  height: 280px;
  
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  
  position: relative;
}

.china-map-svg { font-size: 8rem; opacity: .5; }

.map-dot {
  position: absolute;
  width: 10px; height: 10px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(245,197,24,0.3);
}

.certs-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px;
}

.cert-item {
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 8px; padding: 16px 20px;
  color: #fff; text-align: center;
  font-size: .82rem; font-weight: 600;
  backdrop-filter: blur(6px);
  transition: var(--transition);
}

.cert-item:hover { background: rgba(255,255,255,0.2); }

.cert-award { font-size: 1.2rem; margin-bottom: 6px; }

.business-sub { color: rgba(255,255,255,0.7); font-size: .8rem; margin-bottom: 20px; }

/* 公司资质 */
.qualifications-section { padding: 64px 0; }

/* 资质证书轮播 */
.qual-carousel-wrap {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 40px;
}

.qual-carousel {
  flex: 1;
  overflow: hidden;
  padding: 10px 0;
}

.qual-carousel-track {
  display: flex;
  gap: 24px;
  transition: transform 0.4s ease;
}

.qual-cert-item {
  flex: 0 0 auto;
  width: 180px;
  text-align: center;
}

.qual-cert-img {
  width: 100%;
  height: 240px;
  border-radius: var(--radius);
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  overflow: hidden;
}

.qual-cert-img:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(22,89,212,0.15);
}

.qual-cert-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.qual-cert-placeholder {
  font-size: 3rem;
  opacity: 0.6;
}

.qual-cert-item p {
  margin-top: 12px;
  font-size: .85rem;
  color: var(--text-gray);
  font-weight: 500;
}

.qual-carousel-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: #fff;
  color: var(--primary);
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  flex-shrink: 0;
}

.qual-carousel-btn:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* 旧样式兼容 */
.qual-grid {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px;
}

.qual-card {
  border: 2px solid var(--border); border-radius: var(--radius);
  padding: 20px; text-align: center;
  background: linear-gradient(135deg, #f0f7ff, #fff);
  transition: var(--transition);
}

.qual-card:hover { border-color: var(--primary); transform: translateY(-3px); }

.qual-icon { font-size: 2.5rem; margin-bottom: 10px; }
.qual-card p { font-size: .78rem; color: var(--text-gray); }

/* 联系我们 */
.contact-section { padding: 64px 0; }

.contact-layout {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0;
}

.contact-info { padding-right: 48px; }
.contact-info h2 { font-size: 1.8rem; font-weight: 800; margin-bottom: 4px; }
.contact-en { font-size: 2rem; font-weight: 900; color: rgba(22,89,212,0.08); margin-bottom: 24px; letter-spacing:.05em; }

.contact-item {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 18px 0; border-bottom: 1px solid var(--border);
}

.contact-item:last-child { border-bottom: none; }

.contact-item-icon {
  width: 44px; height: 44px; border-radius: 10px;
  background: var(--bg-light); border: 1.5px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; flex-shrink: 0;
}

.contact-item h4 { font-size: .82rem; color: var(--text-gray); margin-bottom: 4px; }
.contact-item p { font-size: .95rem; font-weight: 600; color: var(--text-dark); }

.contact-map {
  height: 100%; min-height: 400px;
  background: linear-gradient(135deg, #e8f0fe, #dbeafe);
  border-radius: 0 var(--radius) var(--radius) 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; color: var(--text-gray);
  position: relative; overflow: hidden;
}

.map-placeholder {
  width: 100%; height: 100%;
  background: #e8eef8;
  display: flex; align-items: center; justify-content: center;
  flex-direction: column; gap: 12px;
}

.map-marker {
  display: flex; align-items: center; gap: 8px;
  background: var(--primary); color: #fff;
  padding: 8px 16px; border-radius: 6px;
  font-size: .88rem; font-weight: 600;
  box-shadow: 0 4px 16px rgba(22,89,212,0.4);
  position: absolute;
  bottom: 30%; left: 25%;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .footer-main { grid-template-columns: 1fr 1fr; gap: 32px; }
  .solutions-grid { grid-template-columns: repeat(2, 1fr); }
  .software-grid { grid-template-columns: repeat(2, 1fr); }
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .qual-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .nav-menu { display: none; }
  .nav-toggle { display: flex; }

  .nav-menu.open {
    display: flex; flex-direction: column;
    position: fixed; top: 64px; left: 0; right: 0;
    background: #fff; padding: 16px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    z-index: 999;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
  }

  .nav-menu.open .nav-dropdown {
    display: block;
    position: static;
    box-shadow: none;
    padding-left: 16px;
  }

  .hero-slider { height: 280px; }
  .slide-content { padding: 0 24px; }
  .slide-content h1 { font-size: 1.3rem; }
  .slide-content p { display: none; }
  .slide-nav { display: none; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid .stat-item:nth-child(2) { border-right: none; }
  .stats-grid .stat-item { padding: 10px 8px; }
  .stat-num { font-size: 1.4rem; }

  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .aiot-diagram { max-width: 280px; }
  .aiot-center { width: 90px; height: 90px; font-size: .7rem; }
  .aiot-center .main-text { font-size: .85rem; }
  .aiot-node { width: 60px; height: 60px; font-size: .7rem; }

  .solutions-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .sol-card { height: 160px; }
  .sol-card .sol-title { font-size: 1rem; }

  .cases-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .case-card { height: 120px; }

  /* 页脚移动端：只显示品牌联系信息，隐藏多余列 */
  .footer-main {
    grid-template-columns: 1fr;
    gap: 0;
    padding: 28px 0 16px;
  }
  /* 页脚移动端：单列堆叠，居中展示 */
  .footer-main {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 28px 0 16px;
  }
  .footer-brand { text-align: center; padding-bottom: 20px; border-bottom: 1px solid rgba(255,255,255,0.1); }
  .footer-contact-item { justify-content: center; }
  .footer-col { text-align: center; padding-bottom: 20px; border-bottom: 1px solid rgba(255,255,255,0.1); }
  .footer-col ul { padding-left: 0; list-style: none; }
  .footer-col ul li { display: inline-block; margin: 0 8px 6px; }
  /* 二维码列居中 */
  .footer-main > div[style*="text-align:center"],
  .footer-main > div[style*="text-align: center"] {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  .footer-bottom {
    padding: 12px 0;
    font-size: .72rem;
  }

  .industry-layout { grid-template-columns: 1fr; }
  .industry-list { grid-template-columns: repeat(3, 1fr); gap: 10px; }
  .ind-item { padding: 16px 8px; min-width: auto; }
  .ind-icon { font-size: 1.6rem; }
  .ind-item span { font-size: .85rem; }

  .company-intro-grid { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
  .contact-map { height: 280px; border-radius: var(--radius); margin-top: 24px; }
  .contact-info { padding-right: 0; }
  .case-detail { grid-template-columns: 1fr; }

  .software-grid { grid-template-columns: 1fr; }
  .hardware-grid { grid-template-columns: 1fr; }
  .hw-card { flex-direction: column; text-align: center; }
  .hw-img { width: 80px; height: 64px; }
  .service-grid { grid-template-columns: 1fr 1fr; }
  .business-layout { grid-template-columns: 1fr; }
  .certs-grid { grid-template-columns: 1fr 1fr; }

  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }

  /* 产品页导航优化 — 2×2网格 */
  .product-nav-cards {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 8px !important;
  }
  .product-nav-card {
    padding: 10px 10px !important;
    gap: 8px !important;
  }
  .product-nav-card .card-icon {
    width: 32px !important;
    height: 32px !important;
    min-width: 32px !important;
    font-size: 1rem !important;
  }
  .product-nav-card .card-info div:first-child {
    font-size: .82rem !important;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  /* 手机端隐藏卡片副标题，减少视觉噪音 */
  .product-nav-card .card-info div:last-child {
    display: none !important;
  }

  /* 子导航：横向滚动，不换行 */
  .product-nav[style*="background:#f8fafc"] .container,
  .product-nav + .product-nav .container,
  div.product-nav:has(.product-nav-links) .container {
    padding-right: 0 !important;
  }
  .product-nav-links {
    display: flex !important;
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    gap: 0 !important;
    padding: 0 !important;
    scrollbar-width: none !important;
    /* 左右留一点边距方便滑动 */
    padding-left: 16px !important;
  }
  .product-nav-links::-webkit-scrollbar { display: none !important; }
  .product-nav-links a {
    flex-shrink: 0 !important;
    padding: 10px 14px !important;
    font-size: .82rem !important;
    white-space: nowrap !important;
  }

  /* 功能卡片网格优化 */
  .feature-grid {
    grid-template-columns: 1fr !important;
    gap: 16px !important;
  }
  .feature-grid[style*="repeat(4"] {
    grid-template-columns: repeat(2, 1fr) !important;
  }

  /* 实体安全管理-功能介绍：切换显示形式 */
  .psim-func-desktop { display: none !important; }
  .psim-func-mobile { display: block !important; }

  /* 智慧机场-方案价值3列→1列 */
  .airport-value-grid,
  div[style*="grid-template-columns:repeat(3,1fr)"] {
    grid-template-columns: 1fr !important;
  }

  /* 智慧机场-平台左右两列→单列 */
  div[style*="grid-template-columns:1fr 1fr"] {
    grid-template-columns: 1fr !important;
  }

  /* 智慧机场-图标3列→2列 */
  div[style*="grid-template-columns:repeat(3,1fr);gap:16px"] {
    grid-template-columns: repeat(2, 1fr) !important;
  }

  /* 解决方案页面通用两列→单列 */
  .solution-two-col {
    grid-template-columns: 1fr !important;
  }

  /* 内页Banner优化 */
  .inner-banner { height: 200px; }
  .inner-banner h1 { font-size: 1.4rem; }

  /* 面包屑导航优化 */
  .breadcrumb-tabs { flex-wrap: wrap; gap: 8px; }
  .bc-tab { padding: 6px 14px; font-size: .8rem; }

  /* 容器内边距优化 */
  .container { padding: 0 16px; }

  /* 标题字号优化 */
  .section-title { font-size: 1.3rem; }

  /* 硬件卡片网格优化 */
  .hardware-cards-grid {
    grid-template-columns: 1fr !important;
  }

  /* 服务流程优化 */
  .service-flow {
    flex-direction: column !important;
    gap: 16px !important;
  }
  .service-flow-item {
    width: 100% !important;
  }

  /* 方案价值卡片优化 */
  .value-cards {
    grid-template-columns: 1fr !important;
  }

  /* 产品标签页优化 */
  .prod-tabs { flex-wrap: wrap; }
  .prod-tab { padding: 8px 20px; font-size: .85rem; }

  /* AI助手悬浮按钮优化 */
  .ai-float { right: 12px; bottom: 80px; }
  .ai-float-btn { width: 44px; height: 44px; font-size: .55rem; }
  .ai-float-phone { padding: 6px 8px; font-size: .65rem; }
}

@media (max-width: 480px) {
  .solutions-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .service-grid { grid-template-columns: 1fr; }
  .industry-photos { grid-template-columns: repeat(2, 1fr); }
  .qual-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-main { grid-template-columns: 1fr; }

  /* 超小屏幕产品导航：保持2列 */
  .product-nav-cards {
    grid-template-columns: repeat(2, 1fr) !important;
  }

  /* 行业列表优化 */
  .industry-list { grid-template-columns: repeat(2, 1fr); }

  /* 证书轮播优化 */
  .qual-cert-item { width: 140px; }
  .qual-cert-img { height: 180px; }

  /* 合作伙伴优化 */
  .partner-logo { width: 140px; height: 70px; font-size: 1rem; }

  /* 功能卡片4列变1列 */
  .feature-grid[style*="repeat(4"] {
    grid-template-columns: 1fr !important;
  }

  /* 按钮全宽 */
  .btn-primary, .btn-outline {
    width: 100%;
    justify-content: center;
  }

  /* 案例详情优化 */
  .case-info-grid { grid-template-columns: 1fr; }

  /* 资质网格优化 */
  .certs-grid { grid-template-columns: 1fr; }

  /* 硬件卡片优化 */
  .hw-card { padding: 16px; }

  /* 服务卡片优化 */
  .svc-card { padding: 20px 16px; }

  /* 软件卡片优化 */
  .sw-card { padding: 20px; }
}