/* ============================================
   英赛特科技 - 深色科技风 前台样式
   ============================================ */

:root {
  /* 主色系 */
  --bg: #0a0e1a;
  --bg-2: #0f1524;
  --bg-3: #141b2e;
  --card: rgba(255, 255, 255, 0.04);
  --card-hover: rgba(0, 212, 255, 0.08);
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(0, 212, 255, 0.4);

  /* 强调色 */
  --primary: #00d4ff;
  --primary-2: #267bc3;
  --accent: #7b5cff;
  --grad: linear-gradient(135deg, #00d4ff 0%, #267bc3 100%);
  --grad-2: linear-gradient(135deg, #00d4ff 0%, #7b5cff 100%);

  /* 文字 */
  --text: #e8edf5;
  --text-2: #9aa7bd;
  --text-3: #5f6b80;

  /* 布局 */
  --container: 1200px;
  --radius: 12px;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
  --glow: 0 0 40px rgba(0, 212, 255, 0.25);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "微软雅黑", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--text); text-decoration: none; transition: color .25s; }
a:hover { color: var(--primary); }
img { max-width: 100%; border: none; vertical-align: middle; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5 { font-weight: 600; line-height: 1.3; }

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

.fl { float: left; }
.fr { float: right; }
.clearfix::after { content: ''; display: block; clear: both; }

.grad-text {
  background: var(--grad-2);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ========== 顶部导航 ========== */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: all .3s;
  background: rgba(10, 14, 26, 0.7);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
}
.topbar.scrolled {
  background: rgba(10, 14, 26, 0.92);
  border-bottom-color: var(--border);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}
.topbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo img { max-height: 40px; }
.logo .logo-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: #fff;
  white-space: nowrap;
}
.logo .logo-text.lang-en { font-size: 15px; letter-spacing: 0.2px; }
.logo .logo-text.lang-jp { font-size: 15px; letter-spacing: 0.2px; }
.logo .logo-en {
  font-size: 11px;
  color: var(--primary);
  letter-spacing: 2px;
  display: block;
  font-weight: 400;
  white-space: nowrap;
}

.nav ul { display: flex; align-items: center; gap: 4px; }
.nav li a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--text-2);
  border-radius: 8px;
  position: relative;
  white-space: nowrap;
}
.nav li a:hover, .nav li.active a { color: #fff; }
.nav.lang-en li a { font-family: Verdana, 'Segoe UI', Arial, sans-serif; font-weight: 400; }
.nav li.active a::after {
  content: '';
  position: absolute;
  left: 50%; bottom: 0;
  transform: translateX(-50%);
  width: 20px; height: 2px;
  background: var(--grad);
  border-radius: 2px;
}
.nav-cta {
  margin-left: 12px;
  padding: 9px 22px !important;
  background: var(--grad);
  color: #fff !important;
  border-radius: 30px !important;
  font-weight: 500;
}
.nav-cta:hover { box-shadow: var(--glow); }

/* 语言切换下拉菜单 */
.lang-drop { position: relative; margin-left: 10px; }
.lang-btn {
  display: flex; align-items: center; gap: 6px;
  background: none; border: 1px solid var(--border); border-radius: 20px;
  padding: 6px 14px; color: var(--text-2); font-size: 13px; cursor: pointer;
  transition: all .3s;
}
.lang-btn:hover { color: #fff; border-color: var(--primary); }
.lang-btn .globe { font-size: 15px; line-height: 1; }
.lang-btn .caret { font-size: 10px; opacity: .7; transition: transform .3s; }
.lang-drop.open .lang-btn .caret { transform: rotate(180deg); }
.lang-menu,
.nav ul .lang-menu {
  position: absolute; right: 0; top: calc(100% + 8px);
  background: rgba(14, 18, 32, .98); border: 1px solid var(--border);
  border-radius: 12px; padding: 6px; min-width: 116px;
  display: none; box-shadow: 0 12px 40px rgba(0, 0, 0, .45);
  z-index: 120;
  gap: 0; align-items: normal;
}
.lang-menu.open,
.nav ul .lang-menu.open { display: block; }
.lang-menu a,
.nav ul .lang-menu a {
  display: block; padding: 8px 14px; font-size: 13px; color: var(--text-2);
  border-radius: 8px; white-space: nowrap;
}
.nav ul .lang-menu a::after { display: none; }
.lang-menu a:hover,
.nav ul .lang-menu a:hover { background: rgba(0, 212, 255, .08); color: #fff; }
.lang-menu a.active,
.nav ul .lang-menu a.active { background: var(--grad); color: #fff; }

/* 移动端菜单按钮 */
.nav-toggle { display: none; font-size: 26px; color: #fff; cursor: pointer; background: none; border: none; }

/* ========== 首屏 Hero ========== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: 120px 0 80px;
}
#hero-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(0, 212, 255, 0.15), transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(123, 92, 255, 0.15), transparent 40%);
  z-index: 1;
}
.hero-inner { position: relative; z-index: 2; max-width: 860px; padding: 0 24px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 18px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 30px;
  font-size: 13px;
  color: var(--primary);
  margin-bottom: 28px;
}
.hero-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--primary); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .3; } }

.hero h1 {
  font-size: 56px;
  font-weight: 800;
  color: #fff;
  line-height: 1.25;
  margin-bottom: 24px;
  letter-spacing: 1px;
}
.hero .lead {
  font-size: 19px;
  color: var(--text-2);
  max-width: 640px;
  margin: 0 auto 40px;
}
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 34px;
  border-radius: 30px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all .3s;
}
.btn-primary { background: var(--grad); color: #fff; }
.btn-primary:hover { transform: translateY(-3px); box-shadow: var(--glow); color: #fff; }
.btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.3); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-3px); }

.hero-scroll {
  position: absolute;
  bottom: 34px; left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  color: var(--text-3);
  font-size: 12px;
  text-align: center;
}
.hero-scroll .mouse {
  width: 24px; height: 40px;
  border: 2px solid var(--text-3);
  border-radius: 14px;
  margin: 8px auto 0;
  position: relative;
}
.hero-scroll .mouse::after {
  content: '';
  position: absolute;
  top: 8px; left: 50%;
  width: 3px; height: 7px;
  background: var(--primary);
  border-radius: 3px;
  transform: translateX(-50%);
  animation: wheel 1.8s infinite;
}
@keyframes wheel { 0% { opacity: 1; top: 8px; } 100% { opacity: 0; top: 22px; } }

/* ========== 通用 Section ========== */
.section { padding: 100px 0; position: relative; }
.section.alt { background: var(--bg-2); }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 60px; }
.section-tag {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 14px;
  font-weight: 500;
}
.section-head h2 {
  font-size: 38px;
  color: #fff;
  margin-bottom: 16px;
  font-weight: 700;
}
.section-head p { font-size: 16px; color: var(--text-2); }

/* 滚动渐入 */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ========== 业务卡片 ========== */
.svc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.svc-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 30px;
  transition: all .35s;
  position: relative;
  overflow: hidden;
}
.svc-img {
  width: 100%;
  aspect-ratio: 4/3;
  border-radius: 12px;
  margin-bottom: 18px;
  display: block;
  overflow: hidden;
}
.svc-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.svc-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s;
}
.svc-card:hover {
  background: var(--card-hover);
  border-color: var(--border-hover);
  transform: translateY(-8px);
  box-shadow: var(--shadow);
}
.svc-card:hover::before { transform: scaleX(1); }
.svc-icon {
  width: 60px; height: 60px;
  border-radius: 14px;
  background: rgba(0, 212, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: 22px;
}
.svc-card h3 { font-size: 20px; color: #fff; margin-bottom: 12px; }
.svc-card p { font-size: 14px; color: var(--text-2); margin-bottom: 16px; }
.svc-card .more { font-size: 14px; color: var(--primary); font-weight: 500; }
.svc-card .more::after { content: ' →'; transition: margin .3s; }
.svc-card:hover .more::after { margin-left: 6px; }

/* ========== 数据统计 ========== */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  text-align: center;
}
.stat-num {
  font-size: 52px;
  font-weight: 800;
  background: var(--grad-2);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 12px;
}
.stat-num .unit { font-size: 24px; }
.stat-label { font-size: 15px; color: var(--text-2); }

/* ========== 睿表产品主推 ========== */
.product-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.product-hero .ph-text h2 { font-size: 36px; color: #fff; margin-bottom: 20px; line-height: 1.3; }
.product-hero.ph-top { align-items: flex-start; }
.product-hero .ph-text p { color: var(--text-2); margin-bottom: 24px; font-size: 16px; }
.ph-features { margin-bottom: 32px; }
.ph-features li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
  color: var(--text);
  font-size: 15px;
}
.ph-features .ck {
  flex-shrink: 0;
  width: 24px; height: 24px;
  border-radius: 50%;
  background: rgba(0, 212, 255, 0.15);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  margin-top: 2px;
}
.ph-visual {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  background: var(--bg-3);
}
.ph-visual img { width: 100%; display: block; aspect-ratio: 4/3; object-fit: cover; }
.ph-visual .ph-mock {
  aspect-ratio: 4/3;
  background:
    linear-gradient(135deg, rgba(0,212,255,.1), rgba(123,92,255,.1)),
    var(--bg-3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 90px;
}

/* ========== 案例 ========== */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.case-card {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--card);
  transition: all .35s;
}
.case-card:hover { transform: translateY(-8px); border-color: var(--border-hover); box-shadow: var(--shadow); }
.case-thumb {
  aspect-ratio: 16/10;
  overflow: hidden;
  position: relative;
  background: var(--bg-3);
}
.case-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.case-card:hover .case-thumb img { transform: scale(1.08); }
.case-body { padding: 22px; }
.case-body h3 { font-size: 18px; color: #fff; margin-bottom: 8px; }
.case-body p { font-size: 14px; color: var(--text-2); }
.case-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--primary);
  background: rgba(0,212,255,.1);
  padding: 3px 12px;
  border-radius: 20px;
  margin-bottom: 12px;
}

/* ========== 新闻 ========== */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all .35s;
  display: flex;
  flex-direction: column;
}
.news-card:hover { transform: translateY(-8px); border-color: var(--border-hover); box-shadow: var(--shadow); }
.news-thumb { aspect-ratio: 16/9; overflow: hidden; background: var(--bg-3); }
.news-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.news-card:hover .news-thumb img { transform: scale(1.08); }
.news-body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.news-date { font-size: 13px; color: var(--text-3); margin-bottom: 10px; }
.news-body h3 { font-size: 17px; color: #fff; margin-bottom: 10px; line-height: 1.5; }
.news-body p { font-size: 14px; color: var(--text-2); flex: 1; }

/* ========== 为什么选我们 ========== */
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.why-item { text-align: center; padding: 20px; }
.why-item .why-icon {
  width: 72px; height: 72px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: rgba(0,212,255,.1);
  border: 1px solid rgba(0,212,255,.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
}
.why-item h3 { font-size: 18px; color: #fff; margin-bottom: 10px; }
.why-item p { font-size: 14px; color: var(--text-2); }

/* ========== CTA ========== */
.cta {
  background:
    radial-gradient(circle at 30% 50%, rgba(0,212,255,.18), transparent 50%),
    radial-gradient(circle at 70% 50%, rgba(123,92,255,.18), transparent 50%),
    var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.cta h2 { font-size: 36px; color: #fff; margin-bottom: 16px; }
.cta p { color: var(--text-2); font-size: 17px; margin-bottom: 32px; }

/* ========== 联系 ========== */
.contact-wrap { display: grid; grid-template-columns: 1fr 1.2fr; gap: 50px; align-items: start; }
.contact-info .ci-item { display: flex; gap: 16px; margin-bottom: 28px; }
.ci-item .ci-icon {
  flex-shrink: 0;
  width: 48px; height: 48px;
  border-radius: 12px;
  background: rgba(0,212,255,.12);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
}
.ci-item h4 { font-size: 15px; color: var(--text-2); font-weight: 400; margin-bottom: 4px; }
.ci-item .ci-val { font-size: 17px; color: #fff; }

.form-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 14px; color: var(--text-2); margin-bottom: 8px; }
.form-control {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  transition: border .25s;
}
.form-control:focus { outline: none; border-color: var(--primary); }
textarea.form-control { resize: vertical; min-height: 110px; }
.btn-submit {
  width: 100%;
  padding: 14px;
  background: var(--grad);
  color: #fff;
  border: none;
  border-radius: 30px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: all .3s;
}
.btn-submit:hover { box-shadow: var(--glow); transform: translateY(-2px); }

/* ========== 内页 Banner ========== */
.page-banner {
  position: relative;
  padding: 160px 0 70px;
  text-align: center;
  overflow: hidden;
  background: var(--bg-2);
}
.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 50% 0%, rgba(0,212,255,.18), transparent 55%);
}
.page-banner .container { position: relative; z-index: 2; }
.page-banner h1 { font-size: 42px; color: #fff; margin-bottom: 14px; }
.page-banner .crumb { font-size: 14px; color: var(--text-3); }
.page-banner .crumb a { color: var(--text-2); }
.page-banner .crumb a:hover { color: var(--primary); }

/* ========== 内页主体 ========== */
.main { padding: 70px 0; }
.main-layout { display: grid; grid-template-columns: 260px 1fr; gap: 36px; align-items: start; }
.main-layout > aside { position: sticky; top: 96px; display: flex; flex-direction: column; gap: 20px; }
.side-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.side-title {
  padding: 18px 22px;
  background: var(--grad);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
}
.side-body li a {
  display: block;
  padding: 14px 22px;
  color: var(--text-2);
  border-bottom: 1px solid var(--border);
  font-size: 15px;
}
.side-body li:last-child a { border-bottom: none; }
.side-body li a:hover, .side-body li.active a { color: var(--primary); background: rgba(0,212,255,.06); }

.content-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
}
.content-card h2.page-title { font-size: 28px; color: #fff; margin-bottom: 24px; padding-bottom: 18px; border-bottom: 1px solid var(--border); }
.detail-content { color: var(--text); font-size: 15px; line-height: 1.9; }
.detail-content h2, .detail-content h3 { color: #fff; margin: 24px 0 14px; }
.detail-content p { margin-bottom: 16px; color: var(--text-2); }
.detail-content img { border-radius: 8px; margin: 16px 0; }

/* 列表项 */
.list-item {
  display: flex;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}
.list-item:last-child { border-bottom: none; }
.list-item .li-thumb { width: 220px; flex-shrink: 0; border-radius: 8px; overflow: hidden; aspect-ratio: 16/10; background: var(--bg-3); }
.list-item .li-thumb img { width: 100%; height: 100%; object-fit: cover; }
.list-item .li-body h3 { font-size: 18px; color: #fff; margin-bottom: 10px; }
.list-item .li-body p { color: var(--text-2); font-size: 14px; margin-bottom: 10px; }
.list-item .li-meta { font-size: 13px; color: var(--text-3); }

/* 分页 */
.pagination { display: flex; gap: 8px; justify-content: center; margin-top: 40px; }
.pagination a, .pagination span {
  min-width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  padding: 0 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 14px;
}
.pagination a:hover { border-color: var(--primary); color: var(--primary); }
.pagination .current { background: var(--grad); color: #fff; border-color: transparent; }
.pagination .disabled { opacity: .4; }

/* 面包屑内页网格产品 */
.prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.prod-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all .35s;
}
.prod-card:hover { transform: translateY(-8px); border-color: var(--border-hover); box-shadow: var(--shadow); }
.prod-thumb { aspect-ratio: 4/3; overflow: hidden; background: var(--bg-3); }
.prod-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.prod-card:hover .prod-thumb img { transform: scale(1.08); }
.prod-info { padding: 20px; }
.prod-info h3 { font-size: 17px; color: #fff; margin-bottom: 8px; }
.prod-info p { font-size: 13px; color: var(--text-2); }

/* ========== 页脚 ========== */
.footer {
  background: #070a12;
  border-top: 1px solid var(--border);
  padding: 70px 0 0;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; padding-bottom: 50px; }
.footer .f-about p { color: var(--text-2); font-size: 14px; margin: 18px 0; max-width: 320px; }
.footer h4 { color: #fff; font-size: 16px; margin-bottom: 20px; }
.footer .f-links li { margin-bottom: 12px; }
.footer .f-links a { color: var(--text-2); font-size: 14px; }
.footer .f-links a:hover { color: var(--primary); }
.footer .f-contact li { color: var(--text-2); font-size: 14px; margin-bottom: 14px; display: flex; gap: 10px; }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  text-align: center;
  color: var(--text-3);
  font-size: 13px;
}
.footer-bottom a { color: var(--text-3); }
.footer-bottom a:hover { color: var(--primary); }

/* ========== 响应式 ========== */
@media (max-width: 992px) {
  .svc-grid, .case-grid, .news-grid, .prod-grid { grid-template-columns: repeat(2, 1fr); }
  .stats, .why-grid { grid-template-columns: repeat(2, 1fr); }
  .product-hero, .contact-wrap { grid-template-columns: 1fr; gap: 40px; }
  .main-layout { grid-template-columns: 1fr; }
  .side-box { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 40px; }
}
@media (max-width: 768px) {
  .nav ul {
    position: fixed;
    top: 72px; left: 0; right: 0;
    flex-direction: column;
    background: rgba(10,14,26,.98);
    padding: 20px;
    gap: 8px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-150%);
    transition: transform .3s;
  }
  .nav ul.open { transform: translateY(0); }
  .nav li { width: 100%; }
  .nav li a { padding: 14px 18px; }
  .nav-toggle { display: block; }
  .lang-drop { width: 100%; margin-left: 0; }
  .lang-btn { width: 100%; justify-content: space-between; }
  .nav ul .lang-menu { position: static; width: 100%; margin-top: 4px; box-shadow: none; }
  .svc-grid, .case-grid, .news-grid, .prod-grid, .stats, .why-grid, .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .hero h1 { font-size: 32px; }
  .hero .lead { font-size: 16px; }
  .section { padding: 64px 0; }
  .section-head h2, .product-hero .ph-text h2, .cta h2 { font-size: 28px; }
  .page-banner h1 { font-size: 30px; }
  .content-card { padding: 24px; }
  .list-item { flex-direction: column; }
  .list-item .li-thumb { width: 100%; }
}


/* SVG 图标适配 */
.svc-icon img, .side-body li img, .svc-icon-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}
.svc-icon {
  display: flex;
  align-items: center;
  justify-content: center;
}
.side-body li img.emoji-icon,
.side-body li .svc-icon-img {
  width: 18px;
  height: 18px;
  display: inline-block;
  vertical-align: middle;
  margin-right: 8px;
}

/* ============================================
   深色科技感增强 —— 亮条与光效点缀
   青色→紫色发光渐变线，打破全深色沉闷感
   ============================================ */

/* 顶部导航底部霓虹亮线 */
.topbar::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, transparent, #00d4ff 25%, #7b5cff 50%, #00d4ff 75%, transparent);
  opacity: .85;
  pointer-events: none;
  z-index: 1;
}

/* 区块标题：发光标签 */
.section-tag {
  text-shadow: 0 0 16px rgba(0, 212, 255, 0.6);
}

/* 区块标题下方发光渐变短线（亮条） */
.section-head h2 {
  position: relative;
  padding-bottom: 22px;
  margin-bottom: 4px;
}
.section-head h2::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 76px;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, #00d4ff, #7b5cff, #00d4ff);
  background-size: 200% 100%;
  animation: neonFlow 4s linear infinite;
  box-shadow: 0 0 14px rgba(0, 212, 255, 0.75), 0 0 34px rgba(123, 92, 255, 0.4);
}
@keyframes neonFlow {
  0% { background-position: 0% 0; }
  100% { background-position: 200% 0; }
}

/* 首页 Hero 底部霓虹亮线 */
.hero::after {
  content: '';
  position: absolute;
  left: 12%; right: 12%;
  bottom: 0;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, transparent, #00d4ff, #7b5cff, #00d4ff, transparent);
  box-shadow: 0 0 18px rgba(0, 212, 255, 0.65);
  z-index: 2;
}

/* 服务卡片顶部亮线（hover 展开发光） */
.svc-card::before {
  height: 3px;
  background: linear-gradient(90deg, #00d4ff, #7b5cff);
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.65);
}

/* 卡片 hover 光晕 */
.svc-card:hover,
.case-card:hover,
.news-card:hover,
.why-item:hover {
  border-color: rgba(0, 212, 255, 0.5);
  box-shadow: 0 0 26px rgba(0, 212, 255, 0.16), var(--shadow);
}

/* 主按钮发光 */
.btn-primary {
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.35);
}
.btn-primary:hover {
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.55);
}

/* ===== 内页科技感 ===== */

/* 内页 Banner：网格底 + 光晕 + 底部亮线 */
.page-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.06) 1px, transparent 1px);
  background-size: 46px 46px;
  pointer-events: none;
  z-index: 1;
}
.page-banner .container { z-index: 3; }
.page-banner h1 {
  position: relative;
  padding-bottom: 22px;
}
.page-banner h1::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 70px;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, #00d4ff, #7b5cff);
  box-shadow: 0 0 14px rgba(0, 212, 255, 0.75);
}
.page-banner .crumb {
  text-shadow: 0 0 10px rgba(0, 212, 255, 0.3);
}

/* 内页 Banner 动态背景画布（每页主题化动画） */
.neon-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  pointer-events: none;
}

/* 侧边栏：顶部渐变亮线 + hover 发光 */
.side-box {
  position: relative;
}
.side-box::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, #00d4ff, #7b5cff);
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.6);
}
.side-title {
  box-shadow: inset 0 0 24px rgba(0, 212, 255, 0.18);
}
.side-body li a:hover,
.side-body li.active a {
  border-left: 3px solid #00d4ff;
  padding-left: 19px;
}

/* 内容卡：顶部渐变亮线 + 发光边框 */
.content-card {
  position: relative;
}
.content-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, #00d4ff, #7b5cff);
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.6);
}
.content-card h2.page-title {
  border-bottom: none;
  position: relative;
}
.content-card h2.page-title::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 90px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, #00d4ff, #7b5cff);
  box-shadow: 0 0 10px rgba(0, 212, 255, 0.6);
}

/* 列表项 hover：左侧发光竖条 */
.list-item {
  position: relative;
  padding-left: 18px;
  transition: all .3s;
}
.list-item::before {
  content: '';
  position: absolute;
  left: 0; top: 24px; bottom: 24px;
  width: 3px;
  border-radius: 3px;
  background: linear-gradient(180deg, #00d4ff, #7b5cff);
  opacity: 0;
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.65);
  transition: opacity .3s;
}
.list-item:hover {
  background: linear-gradient(90deg, rgba(0, 212, 255, 0.05), transparent);
  border-radius: 8px;
}
.list-item:hover::before { opacity: 1; }
.list-item .li-thumb {
  border: 1px solid var(--border);
  transition: all .3s;
}
.list-item:hover .li-thumb {
  border-color: rgba(0, 212, 255, 0.5);
  box-shadow: 0 0 16px rgba(0, 212, 255, 0.25);
}

/* 分页当前页发光 */
.pagination .current,
.pagination span.current {
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.5);
}

/* 页脚顶部霓虹亮线 */
.site-footer,
.admin-footer {
  position: relative;
}
.site-footer::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, #00d4ff, #7b5cff, #00d4ff, transparent);
  box-shadow: 0 0 16px rgba(0, 212, 255, 0.55);
  z-index: 2;
}

/* 联系表单控件 focus 发光 */
.form-control input:focus,
.form-control textarea:focus,
.form-control select:focus,
input[type="text"]:focus, input[type="email"]:focus, input[type="tel"]:focus, input[type="password"]:focus, textarea:focus {
  border-color: #00d4ff !important;
  box-shadow: 0 0 14px rgba(0, 212, 255, 0.35) !important;
}

/* 详情页富文本标题亮线 */
.detail-content h2,
.detail-content h3 {
  position: relative;
  padding-left: 14px;
}
.detail-content h2::before,
.detail-content h3::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 70%;
  border-radius: 2px;
  background: linear-gradient(180deg, #00d4ff, #7b5cff);
  box-shadow: 0 0 10px rgba(0, 212, 255, 0.6);
}