/* ============================================================
   亿力通 eleeton - 光纤直放站·手机信号放大器官网
   style.css 主样式表
   ============================================================ */

:root {
  --primary: #0a5cd6;
  --primary-dark: #0846a8;
  --primary-light: #e8f1fd;
  --navy: #0b2e5f;
  --navy-darker: #071f42;
  --accent: #ff8c1a;
  --accent-dark: #e67a00;
  --text: #333;
  --text-light: #666;
  --text-gray: #999;
  --border: #e5e8ec;
  --bg-gray: #f5f7fa;
  --white: #fff;
  --shadow: 0 4px 20px rgba(10, 60, 130, 0.08);
  --shadow-hover: 0 8px 30px rgba(10, 60, 130, 0.15);
  --radius: 8px;
  --transition: all 0.3s ease;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  background: var(--white);
}

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

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ============ 顶部信息条 ============ */
.topbar {
  background: var(--navy-darker);
  color: rgba(255,255,255,0.85);
  font-size: 13px;
  padding: 7px 0;
}
.topbar .container { display: flex; justify-content: space-between; align-items: center; }
.topbar a:hover { color: var(--accent); }
.topbar .welcome { letter-spacing: 0.5px; }
.topbar .hotline { display: flex; align-items: center; gap: 6px; }
.topbar .hotline strong { color: var(--accent); font-size: 15px; font-family: Georgia, serif; letter-spacing: 0.5px; }

/* ============ 头部导航 ============ */
.header {
  background: var(--white);
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  position: sticky;
  top: 0;
  z-index: 1000;
}
.header .container { display: flex; align-items: center; justify-content: space-between; height: 76px; }

.logo { display: flex; align-items: center; gap: 12px; }
.logo-mark {
  width: 46px; height: 46px;
  background: linear-gradient(135deg, var(--primary), #2e8bff);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 20px;
  font-family: Georgia, serif;
  flex-shrink: 0;
}
.logo-text .cn { font-size: 22px; font-weight: 700; color: var(--navy); letter-spacing: 2px; line-height: 1.2; }
.logo-text .en { font-size: 11px; color: var(--text-gray); letter-spacing: 3px; text-transform: uppercase; }

.nav { display: flex; align-items: center; height: 100%; }
.nav > li { position: relative; height: 100%; }
.nav > li > a {
  display: flex; align-items: center; height: 100%;
  padding: 0 18px;
  font-size: 16px;
  color: var(--text);
  font-weight: 500;
}
.nav > li > a:hover, .nav > li.active > a { color: var(--primary); }
.nav > li.active > a::after {
  content: "";
  position: absolute; bottom: 0; left: 18px; right: 18px;
  height: 3px; background: var(--primary); border-radius: 2px 2px 0 0;
}
/* 下拉菜单 */
.nav .dropdown {
  position: absolute; top: 100%; left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: var(--white);
  min-width: 220px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-hover);
  padding: 8px 0;
  opacity: 0; visibility: hidden;
  transition: var(--transition);
}
.nav > li:hover .dropdown { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.nav .dropdown a {
  display: block; padding: 10px 22px;
  font-size: 14px; color: var(--text-light);
  white-space: nowrap;
}
.nav .dropdown a:hover { background: var(--primary-light); color: var(--primary); padding-left: 26px; }

.header-phone { text-align: right; }
.header-phone .label { font-size: 12px; color: var(--text-gray); }
.header-phone .number { font-size: 20px; font-weight: 700; color: var(--primary); font-family: Georgia, serif; letter-spacing: 1px; }

/* 移动端菜单按钮 */
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--navy); margin: 5px 0; transition: var(--transition); }

/* ============ Hero 轮播 ============ */
.hero { position: relative; height: 520px; overflow: hidden; background: var(--navy); }
.hero-slide {
  position: absolute; inset: 0;
  opacity: 0; transition: opacity 0.8s ease;
  display: flex; align-items: center;
  background: linear-gradient(120deg, #071f42 0%, #0b2e5f 45%, #0a5cd6 100%);
}
.hero-slide.active { opacity: 1; }
.hero-bg { position: absolute; inset: 0; z-index: 0; background-size: cover; background-position: center; }
.hero-slide.has-img::before {
  background: linear-gradient(90deg, rgba(7,31,66,0.88) 0%, rgba(7,31,66,0.62) 42%, rgba(7,31,66,0.18) 100%);
}
.hero-slide::before {
  content: "";
  position: absolute; inset: 0; z-index: 1;
  background:
    radial-gradient(circle at 80% 30%, rgba(46,139,255,0.25) 0%, transparent 40%),
    radial-gradient(circle at 15% 80%, rgba(255,140,26,0.12) 0%, transparent 35%);
}
.hero-slide .container { position: relative; z-index: 2; color: #fff; }
.hero-tag {
  display: inline-block;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.3);
  padding: 5px 16px; border-radius: 20px;
  font-size: 14px; margin-bottom: 20px;
  letter-spacing: 1px;
}
.hero h2 { font-size: 44px; line-height: 1.3; margin-bottom: 16px; letter-spacing: 1px; }
.hero h2 em { font-style: normal; color: var(--accent); }
.hero p { font-size: 18px; color: rgba(255,255,255,0.85); margin-bottom: 34px; max-width: 620px; }
.hero-btns { display: flex; gap: 16px; }
.hero-btns .btn-primary { background: var(--accent); }
.hero-btns .btn-primary:hover { background: var(--accent-dark); }
.hero-btns .btn-ghost { border-color: rgba(255,255,255,0.6); color: #fff; }
.hero-btns .btn-ghost:hover { background: rgba(255,255,255,0.12); border-color: #fff; }

.hero-dots { position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%); display: flex; gap: 10px; z-index: 5; }
.hero-dots button {
  width: 32px; height: 4px; border: none; border-radius: 2px;
  background: rgba(255,255,255,0.35); cursor: pointer; transition: var(--transition);
}
.hero-dots button.active { background: var(--accent); width: 46px; }

/* hero 内信号波纹装饰 */
.signal-rings { position: absolute; right: 6%; top: 50%; transform: translateY(-50%); width: 340px; height: 340px; opacity: 0.9; }
.signal-rings .ring {
  position: absolute; border: 2px solid rgba(255,255,255,0.15); border-radius: 50%;
  top: 50%; left: 50%; transform: translate(-50%,-50%);
  animation: ringPulse 3s infinite ease-out;
}
.signal-rings .ring:nth-child(1) { width: 120px; height: 120px; }
.signal-rings .ring:nth-child(2) { width: 200px; height: 200px; animation-delay: 0.5s; }
.signal-rings .ring:nth-child(3) { width: 280px; height: 280px; animation-delay: 1s; }
.signal-rings .ring-core {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  width: 60px; height: 60px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #ffb066);
  display: flex; align-items: center; justify-content: center;
  font-size: 28px; color: #fff;
  box-shadow: 0 0 40px rgba(255,140,26,0.5);
}
@keyframes ringPulse {
  0% { opacity: 0.8; }
  100% { opacity: 0.1; }
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 30px;
  border-radius: var(--radius);
  font-size: 15px; font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 6px 16px rgba(10,92,214,0.35); }
.btn-ghost { border-color: var(--primary); color: var(--primary); background: transparent; }
.btn-ghost:hover { background: var(--primary); color: #fff; }
.btn-lg { padding: 14px 38px; font-size: 16px; }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 6px 16px rgba(255,140,26,0.35); }

/* ============ 通用区块 ============ */
.section { padding: 80px 0; }
.section-gray { background: var(--bg-gray); }
.section-navy { background: linear-gradient(135deg, var(--navy-darker), var(--navy)); color: #fff; }

.section-header { text-align: center; margin-bottom: 50px; }
.section-header .sub {
  color: var(--primary); font-size: 14px;
  letter-spacing: 3px; text-transform: uppercase;
  margin-bottom: 10px; font-weight: 600;
}
.section-header h2 { font-size: 34px; color: var(--navy); letter-spacing: 1px; }
.section-navy .section-header h2 { color: #fff; }
.section-header .line {
  width: 56px; height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  margin: 18px auto 0; border-radius: 2px;
}
.section-header .desc { color: var(--text-light); max-width: 720px; margin: 16px auto 0; font-size: 15px; }
.section-navy .section-header .desc { color: rgba(255,255,255,0.75); }

/* ============ 面包屑 ============ */
.breadcrumb-wrap { background: var(--bg-gray); border-bottom: 1px solid var(--border); padding: 14px 0; }
.breadcrumb { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; font-size: 13px; color: var(--text-gray); }
.breadcrumb a { color: var(--text-gray); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: #ccc; }
.breadcrumb .current { color: var(--primary); }

/* ============ 产品卡片 ============ */
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.product-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.product-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  display: flex; flex-direction: column;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: var(--primary); }
.product-thumb {
  height: 190px;
  background: var(--white);
  display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.product-thumb img {
  width: 100%; height: 100%;
  object-fit: contain;
  padding: 10px;
  transition: var(--transition);
}
.product-card:hover .product-thumb img { transform: scale(1.05); }
.product-thumb .icon { font-size: 64px; filter: drop-shadow(0 4px 8px rgba(10,60,130,0.15)); }
.product-thumb .badge {
  position: absolute; top: 12px; left: 12px;
  background: var(--accent); color: #fff;
  font-size: 12px; padding: 3px 10px; border-radius: 12px;
}
.product-thumb .badge.blue { background: var(--primary); }
.product-body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
.product-body h3 { font-size: 17px; color: var(--navy); margin-bottom: 8px; line-height: 1.4; }
.product-body p { font-size: 13px; color: var(--text-light); flex: 1; }
.product-body .specs { margin: 12px 0; display: flex; flex-wrap: wrap; gap: 6px; }
.spec-tag {
  font-size: 12px; color: var(--primary);
  background: var(--primary-light);
  padding: 2px 9px; border-radius: 3px;
}
.product-body .more { color: var(--primary); font-size: 14px; font-weight: 500; margin-top: 8px; }
.product-body .more:hover { gap: 6px; }

/* ============ 特性/优势卡片 ============ */
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.feature-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 34px 26px;
  text-align: center;
  transition: var(--transition);
  border: 1px solid transparent;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.feature-card .icon {
  width: 74px; height: 74px; margin: 0 auto 20px;
  background: var(--primary-light);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 34px;
}
.feature-card h3 { font-size: 18px; color: var(--navy); margin-bottom: 10px; }
.feature-card p { font-size: 13.5px; color: var(--text-light); }
.section-navy .feature-card { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.12); }
.section-navy .feature-card h3 { color: #fff; }
.section-navy .feature-card p { color: rgba(255,255,255,0.7); }
.section-navy .feature-card .icon { background: rgba(255,255,255,0.1); }

/* 数字统计 */
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat-item { text-align: center; padding: 20px 10px; }
.stat-item .num { font-size: 44px; font-weight: 700; color: var(--accent); font-family: Georgia, serif; line-height: 1.1; }
.stat-item .num span { font-size: 18px; margin-left: 2px; }
.stat-item .label { color: rgba(255,255,255,0.75); margin-top: 6px; font-size: 14px; }

/* ============ 双版本对比（核心创新） ============ */
.duo-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.duo-card {
  background: var(--white);
  border-radius: 14px;
  overflow: hidden;
  border: 2px solid var(--border);
  transition: var(--transition);
  display: flex; flex-direction: column;
}
.duo-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.duo-card.recommend { border-color: var(--accent); position: relative; }
.duo-card.recommend::before {
  content: "推荐";
  position: absolute; top: 16px; right: -34px;
  background: var(--accent); color: #fff;
  font-size: 13px; padding: 4px 40px;
  transform: rotate(45deg);
  z-index: 2;
}
.duo-head { padding: 28px; text-align: center; background: var(--bg-gray); }
.duo-card.recommend .duo-head { background: linear-gradient(135deg, #fff4e5, #ffe8cc); }
.duo-head .type { font-size: 13px; color: var(--text-gray); letter-spacing: 2px; margin-bottom: 6px; }
.duo-head h3 { font-size: 24px; color: var(--navy); }
.duo-head .suit { display: inline-block; margin-top: 10px; font-size: 13px; color: var(--primary); background: var(--primary-light); padding: 4px 14px; border-radius: 14px; }
.duo-card.recommend .duo-head .suit { background: #fff; color: var(--accent-dark); }
.duo-body { padding: 26px 28px; flex: 1; }
.duo-body ul li {
  display: flex; gap: 10px;
  padding: 9px 0;
  font-size: 14px; color: var(--text-light);
  border-bottom: 1px dashed var(--border);
}
.duo-body ul li:last-child { border-bottom: none; }
.duo-body ul li .check { color: var(--primary); font-weight: 700; }
.duo-card.recommend .duo-body ul li .check { color: var(--accent); }
.duo-foot { padding: 0 28px 28px; }
.duo-foot .btn { width: 100%; }

/* ============ 解决方案 ============ */
.solution-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.solution-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  height: 240px;
  background: linear-gradient(135deg, var(--navy), var(--primary-dark));
  display: flex; align-items: flex-end;
  transition: var(--transition);
}
.solution-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.solution-card .bg-icon {
  position: absolute; top: 24px; right: 20px;
  font-size: 60px; opacity: 0.18;
}
.solution-card .content { position: relative; padding: 24px; color: #fff; width: 100%; }
.solution-card .content::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(transparent, rgba(7,31,66,0.9));
  z-index: -1;
}
.solution-card h3 { font-size: 18px; margin-bottom: 6px; }
.solution-card p { font-size: 13px; color: rgba(255,255,255,0.75); }
.solution-card .link { display: inline-block; margin-top: 12px; font-size: 13px; color: var(--accent); }

/* ============ 案例卡片 ============ */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.case-thumb { height: 190px; background: var(--bg-gray); overflow: hidden; }
.case-thumb img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.case-card:hover .case-thumb img { transform: scale(1.05); }
.case-body { padding: 22px; }
.case-body .tag { font-size: 12px; color: var(--primary); background: var(--primary-light); padding: 3px 10px; border-radius: 3px; }
.case-body h3 { font-size: 16px; color: var(--navy); margin: 12px 0 8px; line-height: 1.5; }
.case-body p { font-size: 13px; color: var(--text-light); }

/* ============ 新闻卡片 ============ */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: var(--transition);
  display: flex; flex-direction: column;
}
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: var(--primary); }
.news-card .meta { display: flex; align-items: center; gap: 10px; font-size: 12px; color: var(--text-gray); margin-bottom: 14px; }
.news-card .meta .cat { color: var(--primary); background: var(--primary-light); padding: 2px 10px; border-radius: 3px; }
.news-card h3 { font-size: 17px; color: var(--navy); line-height: 1.55; margin-bottom: 12px; flex: 1; }
.news-card h3 a:hover { color: var(--primary); }
.news-card p { font-size: 13px; color: var(--text-light); margin-bottom: 14px; }
.news-card .date { font-size: 12px; color: var(--text-gray); }
.news-card .more { color: var(--primary); font-size: 13px; font-weight: 500; }

/* 新闻列表页 */
.news-list { display: flex; flex-direction: column; gap: 20px; max-width: 860px; margin: 0 auto; }
.news-item {
  display: flex; gap: 24px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: var(--transition);
}
.news-item:hover { box-shadow: var(--shadow-hover); border-color: var(--primary); }
.news-item .date-box {
  flex-shrink: 0; width: 78px; height: 84px;
  background: var(--primary-light);
  border-radius: var(--radius);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
}
.news-item .date-box .day { font-size: 28px; font-weight: 700; color: var(--primary); font-family: Georgia, serif; line-height: 1.1; }
.news-item .date-box .ym { font-size: 12px; color: var(--text-gray); }
.news-item .info h3 { font-size: 17px; color: var(--navy); margin-bottom: 8px; line-height: 1.5; }
.news-item .info h3 a:hover { color: var(--primary); }
.news-item .info p { font-size: 13.5px; color: var(--text-light); margin-bottom: 10px; }
.news-item .info .meta { font-size: 12px; color: var(--text-gray); display: flex; gap: 16px; }

/* ============ 文章详情页 ============ */
.article-page { max-width: 860px; margin: 0 auto; }
.article-header { margin-bottom: 30px; }
.article-header h1 { font-size: 28px; color: var(--navy); line-height: 1.5; margin-bottom: 16px; }
.article-header .meta { display: flex; flex-wrap: wrap; gap: 20px; font-size: 13px; color: var(--text-gray); padding-bottom: 20px; border-bottom: 1px solid var(--border); }
.article-content { font-size: 15.5px; line-height: 1.9; color: #3a3a3a; padding-top: 28px; }
.article-content h2 { font-size: 22px; color: var(--navy); margin: 34px 0 16px; padding-left: 12px; border-left: 4px solid var(--primary); }
.article-content h3 { font-size: 18px; color: var(--navy); margin: 28px 0 12px; }
.article-content p { margin-bottom: 16px; }
.article-content ul { margin: 0 0 16px 8px; }
.article-content ul li { padding-left: 20px; position: relative; margin-bottom: 8px; list-style: none; }
.article-content ul li::before { content: "•"; color: var(--primary); position: absolute; left: 4px; }
.article-content blockquote {
  background: var(--primary-light);
  border-left: 4px solid var(--primary);
  padding: 16px 20px;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 20px 0;
  color: var(--primary-dark);
}
.article-content table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 14px; }
.article-content th, .article-content td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; }
.article-content th { background: var(--bg-gray); color: var(--navy); }
.article-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 36px; padding-top: 24px; border-top: 1px solid var(--border); }
.article-tags a { font-size: 13px; color: var(--text-light); background: var(--bg-gray); padding: 4px 14px; border-radius: 14px; }
.article-tags a:hover { color: var(--primary); background: var(--primary-light); }

/* ============ FAQ 手风琴（GEO 优化核心） ============ */
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 14px;
  overflow: hidden;
}
.faq-item.open { border-color: var(--primary); box-shadow: var(--shadow); }
.faq-q {
  width: 100%;
  background: none; border: none;
  padding: 18px 22px;
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  cursor: pointer;
  font-size: 15.5px; font-weight: 500; color: var(--navy);
  text-align: left;
  font-family: inherit;
}
.faq-q .arrow { flex-shrink: 0; width: 22px; height: 22px; border-radius: 50%; background: var(--primary-light); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 13px; transition: var(--transition); }
.faq-item.open .faq-q .arrow { transform: rotate(45deg); background: var(--primary); color: #fff; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
.faq-a-inner { padding: 0 22px 20px; font-size: 14.5px; color: var(--text-light); line-height: 1.85; }
.faq-a-inner p { margin-bottom: 10px; }
.faq-a-inner ul { margin-left: 4px; }
.faq-a-inner ul li { padding-left: 18px; position: relative; margin-bottom: 6px; }
.faq-a-inner ul li::before { content: "•"; color: var(--primary); position: absolute; left: 2px; }

/* ============ 页面 Hero（子页横幅） ============ */
.page-hero {
  background: linear-gradient(120deg, var(--navy-darker), var(--navy) 55%, var(--primary-dark));
  color: #fff;
  padding: 64px 0;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(circle at 85% 20%, rgba(46,139,255,0.3) 0%, transparent 45%);
}
.page-hero .container { position: relative; }
.page-hero h1 { font-size: 34px; letter-spacing: 1px; margin-bottom: 10px; }
.page-hero p { color: rgba(255,255,255,0.75); font-size: 15px; }

/* ============ 联系/表单 ============ */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; align-items: start; }
.contact-info-card {
  background: linear-gradient(135deg, var(--navy-darker), var(--navy));
  color: #fff;
  border-radius: 14px;
  padding: 40px 36px;
}
.contact-info-card h3 { font-size: 22px; margin-bottom: 8px; }
.contact-info-card .sub { color: rgba(255,255,255,0.65); font-size: 14px; margin-bottom: 30px; }
.contact-line { display: flex; gap: 16px; padding: 16px 0; border-bottom: 1px solid rgba(255,255,255,0.1); }
.contact-line:last-of-type { border-bottom: none; }
.contact-line .icon {
  width: 44px; height: 44px; flex-shrink: 0;
  background: rgba(255,255,255,0.1);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
}
.contact-line .label { font-size: 12px; color: rgba(255,255,255,0.55); }
.contact-line .value { font-size: 15.5px; margin-top: 2px; line-height: 1.5; }
.contact-line .value strong { color: var(--accent); font-size: 19px; font-family: Georgia, serif; letter-spacing: 0.5px; }

.form-card { background: var(--white); border: 1px solid var(--border); border-radius: 14px; padding: 36px; box-shadow: var(--shadow); }
.form-card h3 { font-size: 20px; color: var(--navy); margin-bottom: 6px; }
.form-card .sub { font-size: 13px; color: var(--text-gray); margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 13.5px; color: var(--text); margin-bottom: 7px; font-weight: 500; }
.form-group label .req { color: #e53e3e; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid #d8dee6;
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  transition: var(--transition);
  background: var(--white);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(10,92,214,0.12);
}
.form-group textarea { resize: vertical; min-height: 110px; }
.form-submit { width: 100%; }
.form-note { font-size: 12px; color: var(--text-gray); text-align: center; margin-top: 12px; }

/* ============ 关于我们 ============ */
.about-intro { display: grid; grid-template-columns: 1.1fr 1fr; gap: 44px; align-items: center; }
.about-visual {
  background: linear-gradient(135deg, var(--primary), #2e8bff);
  border-radius: 16px;
  height: 360px;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  color: #fff; text-align: center;
  position: relative; overflow: hidden;
}
.about-visual::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(circle at 30% 20%, rgba(255,255,255,0.18) 0%, transparent 45%);
}
.about-visual .big { font-size: 56px; font-weight: 700; font-family: Georgia, serif; position: relative; }
.about-visual .big span { font-size: 22px; }
.about-visual .txt { font-size: 16px; margin-top: 8px; opacity: 0.9; position: relative; }
.about-visual img { width: 100%; height: 100%; object-fit: cover; }
.about-photo {
  border-radius: 16px;
  overflow: hidden;
  height: 360px;
  background: var(--bg-gray);
  border: 1px solid var(--border);
}
.about-photo img { width: 100%; height: 100%; object-fit: cover; }
.about-text h2 { font-size: 28px; color: var(--navy); margin-bottom: 20px; }
.about-text p { color: var(--text-light); margin-bottom: 14px; font-size: 15px; }
.about-text .highlight {
  background: var(--primary-light);
  border-left: 4px solid var(--primary);
  padding: 14px 18px;
  border-radius: 0 8px 8px 0;
  color: var(--primary-dark);
  font-size: 14.5px;
  margin: 18px 0;
}
.timeline { position: relative; max-width: 860px; margin: 0 auto; padding-left: 30px; }
.timeline::before { content: ""; position: absolute; left: 8px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(var(--primary), var(--accent)); }
.timeline-item { position: relative; padding-bottom: 34px; }
.timeline-item::before {
  content: "";
  position: absolute; left: -28px; top: 6px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--white);
  border: 3px solid var(--primary);
}
.timeline-item .year { font-size: 20px; font-weight: 700; color: var(--primary); font-family: Georgia, serif; }
.timeline-item h3 { font-size: 17px; color: var(--navy); margin: 6px 0; }
.timeline-item p { font-size: 14px; color: var(--text-light); }

/* 资质徽章 */
.cert-row { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }
.cert-badge {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 26px;
  display: flex; align-items: center; gap: 12px;
  font-size: 14.5px; color: var(--navy); font-weight: 500;
  transition: var(--transition);
}
.cert-badge:hover { border-color: var(--primary); box-shadow: var(--shadow); transform: translateY(-3px); }
.cert-badge .icon { font-size: 24px; }

/* ============ CTA 条 ============ */
.cta-bar { background: linear-gradient(120deg, var(--primary-dark), var(--primary)); color: #fff; padding: 52px 0; }
.cta-bar .container { display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.cta-bar h2 { font-size: 26px; margin-bottom: 8px; }
.cta-bar p { color: rgba(255,255,255,0.8); font-size: 15px; }
.cta-bar .phone { font-size: 30px; font-weight: 700; color: var(--accent); font-family: Georgia, serif; letter-spacing: 1px; }
.cta-bar .phone-label { font-size: 13px; color: rgba(255,255,255,0.7); }

/* ============ 页脚 ============ */
.footer { background: var(--navy-darker); color: rgba(255,255,255,0.65); padding: 60px 0 0; font-size: 13.5px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 44px; }
.footer h4 { color: #fff; font-size: 16px; margin-bottom: 20px; letter-spacing: 1px; }
.footer-brand .logo { margin-bottom: 18px; }
.footer-brand .logo-text .cn { color: #fff; font-size: 20px; }
.footer-brand .logo-text .en { color: rgba(255,255,255,0.4); }
.footer-brand p { line-height: 1.9; }
.footer ul li { margin-bottom: 11px; }
.footer ul a:hover { color: var(--accent); padding-left: 4px; }
.footer-contact li { display: flex; gap: 10px; margin-bottom: 13px; line-height: 1.7; }
.footer-contact .fi { flex-shrink: 0; margin-top: 3px; }
.footer-contact strong { color: var(--accent); font-size: 16px; font-family: Georgia, serif; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 20px 0; }
.footer-bottom .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: 12.5px; color: rgba(255,255,255,0.4); }

/* ============ 悬浮咨询 ============ */
.float-contact { position: fixed; right: 20px; bottom: 100px; z-index: 999; display: flex; flex-direction: column; gap: 10px; }
.float-btn {
  width: 54px; height: 54px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  font-size: 11px;
  box-shadow: 0 4px 16px rgba(10,92,214,0.4);
  transition: var(--transition);
}
.float-btn:hover { transform: translateY(-3px); background: var(--primary-dark); }
.float-btn .fi { font-size: 20px; line-height: 1.2; }
.float-btn.wechat { background: #07c160; box-shadow: 0 4px 16px rgba(7,193,96,0.4); }
.float-btn.top { background: var(--navy); box-shadow: 0 4px 16px rgba(11,46,95,0.4); }
.float-btn.phone-btn { background: var(--accent); box-shadow: 0 4px 16px rgba(255,140,26,0.4); }

/* ============ 页面切换动画 ============ */
.fade-up { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .product-grid, .product-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
  .feature-grid, .solution-grid { grid-template-columns: repeat(2, 1fr); }
  .case-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .hero h2 { font-size: 36px; }
  .signal-rings { display: none; }
  .duo-grid { gap: 20px; }
}

@media (max-width: 768px) {
  .topbar .welcome { display: none; }
  .header-phone { display: none; }
  .nav-toggle { display: block; }
  .nav {
    position: fixed;
    top: 0; right: -280px;
    width: 280px; height: 100vh;
    background: var(--white);
    flex-direction: column;
    align-items: stretch;
    padding: 80px 0 30px;
    transition: right 0.3s ease;
    box-shadow: -4px 0 20px rgba(0,0,0,0.1);
    overflow-y: auto;
    z-index: 1001;
  }
  .nav.open { right: 0; }
  .nav > li { height: auto; }
  .nav > li > a { padding: 14px 28px; height: auto; }
  .nav > li.active > a::after { display: none; }
  .nav .dropdown {
    position: static;
    transform: none;
    opacity: 1; visibility: visible;
    box-shadow: none;
    padding: 0 0 6px 0;
    display: none;
  }
  .nav > li:hover .dropdown { transform: none; }
  .nav .dropdown a { padding: 10px 44px; }
  .nav .dropdown { display: none; }
  .nav li.dropdown-parent.open-mobile .dropdown { display: block; }

  .hero { height: 430px; }
  .hero h2 { font-size: 27px; }
  .hero p { font-size: 15px; }
  .hero-btns { flex-direction: column; }
  .hero-btns .btn { width: 70%; }

  .section { padding: 54px 0; }
  .section-header h2 { font-size: 26px; }
  .product-grid, .product-grid.cols-3,
  .feature-grid, .solution-grid,
  .case-grid, .news-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .product-thumb { height: 140px; }
  .product-thumb .icon { font-size: 44px; }
  .product-body { padding: 14px; }
  .product-body h3 { font-size: 15px; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .stat-item .num { font-size: 32px; }
  .duo-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .about-intro { grid-template-columns: 1fr; }
  .about-visual { height: 260px; }
  .form-row { grid-template-columns: 1fr; }
  .news-item { flex-direction: column; gap: 14px; }
  .news-item .date-box { width: 100%; height: auto; flex-direction: row; gap: 8px; padding: 10px; }
  .page-hero { padding: 44px 0; }
  .page-hero h1 { font-size: 26px; }
  .cta-bar .container { justify-content: center; text-align: center; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .float-contact { right: 12px; bottom: 80px; }
  .float-btn { width: 48px; height: 48px; }
  .article-header h1 { font-size: 22px; }
  /* 窄屏下规格表格改为容器内横向滑动，避免撑破页面 */
  table { display: block; max-width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; font-size: 13px !important; }
  table th, table td { padding: 9px 10px !important; }
  /* 抽屉菜单打开时，汉堡按钮保持在最上层可再次点击关闭 */
  .nav-toggle { position: relative; z-index: 1002; }
}

@media (max-width: 480px) {
  .product-grid, .product-grid.cols-3,
  .feature-grid, .solution-grid { grid-template-columns: 1fr; }
  .case-grid, .news-grid { grid-template-columns: 1fr; }
  .wechat-modal-card { padding: 22px 18px 18px; }
  .wechat-modal-card img { width: 180px; height: 180px; }
}

/* ---------- 微信咨询（浮动按钮 + 二维码弹层） ---------- */
.float-btn.wechat-btn { background: #09bb07; border-color: #09bb07; color: #fff; }
.float-btn.wechat-btn:hover { background: #07ad06; border-color: #07ad06; }
.wechat-modal { position: fixed; inset: 0; z-index: 9999; display: flex; align-items: center; justify-content: center; }
.wechat-modal[hidden] { display: none; }
.wechat-modal-mask { position: absolute; inset: 0; background: rgba(7, 20, 40, 0.62); }
.wechat-modal-card {
  position: relative; background: #fff; border-radius: 16px;
  padding: 28px 28px 22px; text-align: center;
  max-width: 300px; width: calc(100% - 48px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  animation: wxPop 0.22s ease;
}
@keyframes wxPop { from { transform: scale(0.92); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.wechat-modal-card h3 { margin: 0 0 16px; font-size: 18px; color: #0b2e5f; }
.wechat-modal-card img { width: 220px; height: 220px; display: block; margin: 0 auto; }
.wechat-modal-card p { font-size: 14px; color: #666; margin: 12px 0 0; }
.wechat-phone { margin-top: 12px; padding-top: 12px; border-top: 1px dashed #e5e8ec; font-size: 15px; color: #333; }
.wechat-phone a { color: #0a5cd6; font-weight: 700; }
.wechat-close { position: absolute; top: 6px; right: 12px; background: none; border: none; font-size: 26px; color: #999; cursor: pointer; line-height: 1; }
.wechat-close:hover { color: #333; }