/* ============================================================
   常州宙达机器人科技有限公司 官网样式 v2
   配色基于公司LOGO主色 #18a8d8（青蓝）+ 深海蓝
   风格对标：海康机器人 / 仙工智能 / 智世机器人
   ============================================================ */

:root {
  /* 品牌色（源自LOGO favicon主色分析） */
  --brand: #18a8d8;
  --brand-hover: #2bb8e8;
  --brand-deep: #0e7fa8;
  --brand-dark: #0a6a8f;
  /* 深海蓝 */
  --navy: #0a3d5c;
  --navy-deep: #062c44;
  --navy-black: #041e30;
  /* 辅助色 */
  --bg-light: #f2f9fc;
  --bg-card: #ffffff;
  --border: #e2edf3;
  --text: #16323f;
  --text-2: #4e6a78;
  --text-3: #8aa3b0;
  --gold: #f5a623;
  --green: #2eb67d;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 2px 16px rgba(10, 61, 92, 0.07);
  --shadow-hover: 0 12px 36px rgba(10, 61, 92, 0.14);
  --maxw: 1240px;
  --ease: cubic-bezier(.25,.6,.3,1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  color: var(--text);
  background: var(--bg-card);
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--brand-deep); text-decoration: none; transition: color .25s var(--ease); }
a:hover { color: var(--brand); }
img { max-width: 100%; display: block; }
ul { list-style: none; }

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

/* ============ 顶部导航 ============ */
.topbar {
  background: var(--navy-deep);
  color: rgba(255,255,255,.75);
  font-size: 13px;
}
.topbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 36px;
}
.topbar span b { color: var(--brand); margin-right: 4px; }

.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--border);
  transition: box-shadow .3s var(--ease);
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand { display: flex; align-items: center; gap: 12px; }
.brand .brand-mark {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--brand) 0%, var(--navy) 100%);
  color: #fff;
  font-weight: 800;
  font-size: 17px;
  letter-spacing: .5px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 12px rgba(24,168,216,.35);
}
.brand .brand-name { line-height: 1.25; }
.brand .brand-name .cn { font-size: 19px; font-weight: 700; color: var(--navy); letter-spacing: 2px; }
.brand .brand-name .en { font-size: 10.5px; color: var(--text-3); letter-spacing: 1.5px; text-transform: uppercase; }

.nav-menu { display: flex; align-items: center; gap: 2px; }
.nav-menu > li { position: relative; }
.nav-menu > li > a {
  display: block;
  padding: 10px 18px;
  font-size: 15px;
  color: var(--text);
  border-radius: 8px;
  font-weight: 500;
}
.nav-menu > li > a:hover { color: var(--brand); background: var(--bg-light); }
.nav-menu > li > a.active { color: var(--brand); font-weight: 700; }
.nav-menu > li > a.active::after {
  content: "";
  position: absolute;
  left: 18px; right: 18px; bottom: 2px;
  height: 3px; border-radius: 2px;
  background: var(--brand);
}

.nav-menu > li > a.nav-btn {
  background: var(--brand);
  color: #fff !important;
  padding: 9px 22px !important;
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(24,168,216,.35);
}
.nav-menu > li > a.nav-btn:hover { background: var(--brand-hover); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 10px; }
.nav-toggle span { width: 24px; height: 3px; background: var(--navy); border-radius: 2px; transition: .3s; }

/* ============ Hero ============ */
.hero {
  position: relative;
  background:
    radial-gradient(ellipse 60% 80% at 75% 20%, rgba(24,168,216,.25), transparent 60%),
    radial-gradient(ellipse 50% 70% at 15% 85%, rgba(14,127,168,.3), transparent 60%),
    linear-gradient(150deg, var(--navy-black) 0%, var(--navy-deep) 40%, var(--navy) 100%);
  color: #fff;
  padding: 110px 0 90px;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 70% 70% at 50% 40%, #000 30%, transparent 75%);
}
.hero .container { position: relative; z-index: 2; display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center; }

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(24,168,216,.14);
  border: 1px solid rgba(24,168,216,.45);
  color: #7fd8f5;
  font-size: 13.5px;
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 22px;
  letter-spacing: 1px;
}
.hero h1 {
  font-size: 46px;
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: 1px;
  margin-bottom: 20px;
}
.hero h1 .grad {
  background: linear-gradient(92deg, #4fd0f0 0%, #18a8d8 55%, #7fe3f7 100%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.hero .hero-sub {
  font-size: 17px;
  color: rgba(255,255,255,.72);
  line-height: 2;
  max-width: 520px;
  margin-bottom: 34px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 30px;
  border-radius: 10px;
  font-size: 15.5px;
  font-weight: 600;
  cursor: pointer; border: none;
  transition: all .3s var(--ease);
}
.btn-brand { background: var(--brand); color: #fff; box-shadow: 0 6px 22px rgba(24,168,216,.4); }
.btn-brand:hover { background: var(--brand-hover); transform: translateY(-2px); color:#fff; }
.btn-ghost { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.35); }
.btn-ghost:hover { border-color: #fff; background: rgba(255,255,255,.08); color:#fff; }
.btn-navy { background: var(--navy); color: #fff; }
.btn-navy:hover { background: var(--navy-deep); transform: translateY(-2px); color:#fff; }

.hero-visual {
  position: relative;
  aspect-ratio: 1;
  display: flex; align-items: center; justify-content: center;
}
.hero-visual .ring {
  position: absolute;
  border: 1px dashed rgba(24,168,216,.35);
  border-radius: 50%;
  animation: spin 40s linear infinite;
}
.hero-visual .ring.r1 { width: 78%; height: 78%; }
.hero-visual .ring.r2 { width: 92%; height: 92%; animation-direction: reverse; animation-duration: 55s; border-color: rgba(255,255,255,.12); }
@keyframes spin { to { transform: rotate(360deg); } }
.hero-visual .core {
  width: 62%; aspect-ratio: 1;
  border-radius: 26px;
  background: linear-gradient(145deg, rgba(24,168,216,.18), rgba(10,61,92,.4));
  border: 1px solid rgba(24,168,216,.3);
  backdrop-filter: blur(6px);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 8px;
}
.hero-visual .core .emoji { font-size: 96px; filter: drop-shadow(0 14px 34px rgba(24,168,216,.45)); }
.hero-visual .core .tag {
  font-size: 13px; color: #7fd8f5; letter-spacing: 3px;
  border-top: 1px solid rgba(24,168,216,.3);
  padding-top: 10px;
}
.hero-visual .float {
  position: absolute;
  background: rgba(6,44,68,.85);
  border: 1px solid rgba(24,168,216,.4);
  backdrop-filter: blur(8px);
  padding: 10px 18px;
  border-radius: 12px;
  font-size: 13.5px;
  box-shadow: 0 10px 30px rgba(0,0,0,.35);
  animation: floaty 5s ease-in-out infinite;
}
.hero-visual .float .fv { color: var(--brand); font-weight: 800; font-size: 17px; }
.hero-visual .float.f1 { top: 8%; left: 0; animation-delay: 0s; }
.hero-visual .float.f2 { bottom: 12%; right: -2%; animation-delay: 1.6s; }
.hero-visual .float.f3 { bottom: -2%; left: 8%; animation-delay: 3s; }
@keyframes floaty { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }

/* 数据条 */
.stats-band {
  background: linear-gradient(90deg, var(--navy-deep), var(--navy) 55%, var(--brand-dark));
  color: #fff;
}
.stats-band .container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  padding-top: 34px; padding-bottom: 34px;
  text-align: center;
}
.stats-band .st .n { font-size: 40px; font-weight: 800; color: #fff; line-height: 1.15; }
.stats-band .st .n em { font-style: normal; font-size: 22px; color: var(--brand); }
.stats-band .st .l { font-size: 14px; color: rgba(255,255,255,.65); letter-spacing: 2px; margin-top: 4px; }

/* ============ 通用 Section ============ */
.section { padding: 84px 0; }
.section.alt { background: var(--bg-light); }

.sec-head { text-align: center; max-width: 720px; margin: 0 auto 52px; }
.sec-head .kicker {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--brand);
  font-size: 13.5px; font-weight: 700;
  letter-spacing: 4px;
  margin-bottom: 14px;
}
.sec-head .kicker::before, .sec-head .kicker::after {
  content: ""; width: 28px; height: 2px; background: linear-gradient(90deg, transparent, var(--brand));
}
.sec-head .kicker::after { background: linear-gradient(90deg, var(--brand), transparent); }
.sec-head h2 { font-size: 34px; font-weight: 800; color: var(--navy); letter-spacing: 1px; margin-bottom: 14px; }
.sec-head p { color: var(--text-2); font-size: 16px; }

/* ============ 业务板块（海康式三大卡） ============ */
.biz-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.biz-card {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: all .35s var(--ease);
  display: flex; flex-direction: column;
}
.biz-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-hover); border-color: rgba(24,168,216,.4); }
.biz-card .biz-cover {
  height: 190px;
  display: flex; align-items: center; justify-content: center;
  font-size: 72px;
  position: relative;
}
.biz-card .biz-cover::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(160deg, rgba(24,168,216,.08), transparent 55%);
}
.biz-card .biz-cover.c1 { background: linear-gradient(140deg, #0a3d5c, #0e7fa8); }
.biz-card .biz-cover.c2 { background: linear-gradient(140deg, #062c44, #18a8d8); }
.biz-card .biz-cover.c3 { background: linear-gradient(140deg, #0e7fa8, #0a3d5c); }
.biz-card .biz-body { padding: 28px; flex: 1; display: flex; flex-direction: column; }
.biz-card h3 { font-size: 21px; font-weight: 700; color: var(--navy); margin-bottom: 10px; }
.biz-card .en { font-size: 12px; color: var(--brand); letter-spacing: 2px; text-transform: uppercase; margin-bottom: 10px; font-weight: 600; }
.biz-card p { font-size: 14.5px; color: var(--text-2); margin-bottom: 16px; flex: 1; }
.biz-card .more { font-size: 14.5px; font-weight: 600; color: var(--brand-deep); display: inline-flex; align-items: center; gap: 6px; }
.biz-card:hover .more { gap: 12px; color: var(--brand); }

/* ============ 产品卡 ============ */
.prod-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.prod-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all .35s var(--ease);
  display: flex; flex-direction: column;
}
.prod-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: rgba(24,168,216,.45); }
.prod-card .pc-cover {
  height: 150px;
  background: linear-gradient(145deg, #e8f6fc, #d5eef8);
  display: flex; align-items: center; justify-content: center;
  font-size: 56px;
  position: relative;
}
.prod-card .pc-cover .model {
  position: absolute; top: 12px; left: 12px;
  background: var(--navy);
  color: #7fd8f5;
  font-size: 11.5px; font-weight: 700; letter-spacing: 1px;
  padding: 3px 10px; border-radius: 6px;
}
.prod-card .pc-body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
.prod-card h3 { font-size: 17px; font-weight: 700; color: var(--navy); margin-bottom: 6px; }
.prod-card p { font-size: 13.5px; color: var(--text-2); margin-bottom: 12px; flex: 1; }
.prod-card .specs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.prod-card .specs span {
  font-size: 12px; color: var(--brand-dark);
  background: var(--bg-light);
  border: 1px solid var(--border);
  padding: 2px 10px; border-radius: 100px;
}
.prod-card .more { font-size: 13.5px; font-weight: 600; color: var(--brand-deep); }
.prod-card:hover .more { color: var(--brand); }

/* ============ 解决方案 ============ */
.sol-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.sol-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
  box-shadow: var(--shadow);
  transition: all .35s var(--ease);
  position: relative;
  overflow: hidden;
}
.sol-card::before {
  content: "";
  position: absolute; top: 0; left: 0;
  width: 100%; height: 4px;
  background: linear-gradient(90deg, var(--brand), var(--navy));
  transform: scaleX(0); transform-origin: left;
  transition: transform .4s var(--ease);
}
.sol-card:hover::before { transform: scaleX(1); }
.sol-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
.sol-card .sc-icon {
  width: 58px; height: 58px;
  border-radius: 14px;
  background: linear-gradient(145deg, #e8f6fc, #d5eef8);
  display: flex; align-items: center; justify-content: center;
  font-size: 27px;
  margin-bottom: 16px;
}
.sol-card h3 { font-size: 18px; font-weight: 700; color: var(--navy); margin-bottom: 8px; }
.sol-card p { font-size: 13.8px; color: var(--text-2); }
.sol-card .tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 14px; }
.sol-card .tags span {
  font-size: 11.5px; color: var(--brand-dark);
  background: rgba(24,168,216,.09);
  padding: 2px 10px; border-radius: 100px;
}

/* ============ 案例卡 ============ */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all .35s var(--ease);
  display: flex; flex-direction: column;
}
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.case-card .cc-cover {
  height: 140px;
  display: flex; align-items: center; justify-content: center;
  font-size: 50px;
  position: relative;
}
.case-card .cc-cover .ind {
  position: absolute; top: 14px; left: 14px;
  background: rgba(6,44,68,.8);
  color: #7fd8f5;
  font-size: 12px; font-weight: 600;
  padding: 3px 12px; border-radius: 100px;
  backdrop-filter: blur(4px);
}
.case-card .cc-body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.case-card h3 { font-size: 16.5px; font-weight: 700; color: var(--navy); margin-bottom: 8px; line-height: 1.5; }
.case-card p { font-size: 13.5px; color: var(--text-2); margin-bottom: 16px; flex: 1; }
.case-card .cc-data {
  display: flex; gap: 24px;
  border-top: 1px dashed var(--border);
  padding-top: 14px;
}
.case-card .cc-data .d .v { font-size: 20px; font-weight: 800; color: var(--brand); }
.case-card .cc-data .d .k { font-size: 11.5px; color: var(--text-3); }

/* ============ 新闻 ============ */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all .35s var(--ease);
}
.news-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
.news-card .nc-cover {
  height: 150px;
  display: flex; align-items: center; justify-content: center;
  font-size: 52px;
}
.news-card .nc-body { padding: 20px 22px 24px; }
.news-card .nc-date { font-size: 12.5px; color: var(--brand); font-weight: 700; letter-spacing: 1px; margin-bottom: 6px; }
.news-card h3 {
  font-size: 15.5px; font-weight: 700; color: var(--navy);
  line-height: 1.6; margin-bottom: 8px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.news-card:hover h3 { color: var(--brand); }
.news-card p { font-size: 13px; color: var(--text-2); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ============ 流程步骤 ============ */
.steps { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.step {
  text-align: center;
  position: relative;
  padding: 26px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.step .no {
  width: 44px; height: 44px;
  margin: 0 auto 12px;
  border-radius: 50%;
  background: linear-gradient(145deg, var(--brand), var(--navy));
  color: #fff; font-weight: 800; font-size: 16px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 6px 16px rgba(24,168,216,.35);
}
.step h4 { font-size: 15.5px; font-weight: 700; color: var(--navy); margin-bottom: 6px; }
.step p { font-size: 12.5px; color: var(--text-2); line-height: 1.65; }

/* ============ 服务支持 ============ */
.svc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.svc-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
  text-align: center;
  transition: all .35s var(--ease);
}
.svc-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
.svc-card .ic {
  width: 66px; height: 66px;
  margin: 0 auto 16px;
  border-radius: 18px;
  background: linear-gradient(145deg, var(--brand), var(--navy));
  display: flex; align-items: center; justify-content: center;
  font-size: 30px;
  box-shadow: 0 8px 20px rgba(24,168,216,.3);
}
.svc-card h3 { font-size: 18px; font-weight: 700; color: var(--navy); margin-bottom: 10px; }
.svc-card p { font-size: 14px; color: var(--text-2); }
.svc-card ul { margin-top: 14px; }
.svc-card ul li { font-size: 13.5px; color: var(--text-2); padding: 5px 0; border-bottom: 1px dashed var(--border); }
.svc-card ul li:last-child { border-bottom: none; }

/* FAQ */
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
}
.faq-item details { padding: 0; }
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 22px;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--navy);
  display: flex; justify-content: space-between; align-items: center;
  user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-size: 22px; color: var(--brand);
  transition: transform .3s;
}
.faq-item details[open] summary::after { transform: rotate(45deg); }
.faq-item .faq-body { padding: 0 22px 20px; font-size: 14px; color: var(--text-2); }

/* ============ 产品详情（产品页用） ============ */
.crumbs { padding: 22px 0 0; font-size: 13.5px; color: var(--text-3); }
.crumbs a { color: var(--text-3); }
.crumbs a:hover { color: var(--brand); }
.crumbs b { color: var(--navy); font-weight: 600; }

.page-hero {
  background:
    radial-gradient(ellipse 55% 90% at 80% 10%, rgba(24,168,216,.3), transparent 65%),
    linear-gradient(140deg, var(--navy-black), var(--navy));
  color: #fff;
  padding: 56px 0 60px;
  position: relative; overflow: hidden;
}
.page-hero::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 40px 40px;
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero .ph-kicker { color: #7fd8f5; font-size: 13.5px; letter-spacing: 4px; font-weight: 700; margin-bottom: 10px; }
.page-hero h1 { font-size: 36px; font-weight: 800; letter-spacing: 1px; margin-bottom: 12px; }
.page-hero p { color: rgba(255,255,255,.7); font-size: 16px; max-width: 640px; }

.pd-block {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 44px; align-items: start;
  padding: 44px 0;
  border-bottom: 1px solid var(--border);
}
.pd-block:last-of-type { border-bottom: none; }
.pd-visual {
  background: linear-gradient(145deg, #e8f6fc, #d5eef8);
  border-radius: 16px;
  min-height: 330px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 10px;
  font-size: 110px;
  position: relative;
  border: 1px solid #cbe9f5;
}
.pd-visual .model-tag {
  position: absolute; top: 18px; left: 18px;
  background: var(--navy); color: #7fd8f5;
  font-weight: 800; letter-spacing: 1.5px;
  font-size: 14px; padding: 6px 16px; border-radius: 8px;
}
.pd-visual .visual-note { font-size: 13px; color: var(--brand-dark); }
.pd-info h2 { font-size: 26px; font-weight: 800; color: var(--navy); margin-bottom: 4px; }
.pd-info .pd-en { color: var(--brand); font-size: 13px; letter-spacing: 2px; text-transform: uppercase; font-weight: 700; margin-bottom: 14px; }
.pd-info .pd-desc { font-size: 15px; color: var(--text-2); margin-bottom: 22px; }

table.spec { width: 100%; border-collapse: collapse; font-size: 14px; margin-bottom: 24px; }
table.spec th {
  text-align: left; width: 34%;
  background: var(--bg-light);
  color: var(--navy);
  font-weight: 600;
  padding: 11px 16px;
  border: 1px solid var(--border);
}
table.spec td { padding: 11px 16px; border: 1px solid var(--border); color: var(--text); }

/* tab 切换 */
.tab-bar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 36px; justify-content: center; }
.tab-bar a {
  padding: 9px 24px;
  border-radius: 100px;
  font-size: 14.5px; font-weight: 600;
  color: var(--text-2);
  background: var(--bg-light);
  border: 1px solid var(--border);
}
.tab-bar a:hover, .tab-bar a.on { background: var(--navy); color: #fff; border-color: var(--navy); }

/* ============ 关于我们 ============ */
.about-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 52px; align-items: center; }
.about-grid .txt h2 { font-size: 30px; font-weight: 800; color: var(--navy); margin-bottom: 18px; line-height: 1.4; }
.about-grid .txt h2 em { font-style: normal; color: var(--brand); }
.about-grid .txt p { font-size: 15px; color: var(--text-2); margin-bottom: 14px; }
.about-grid .visual {
  border-radius: 18px;
  min-height: 360px;
  background:
    radial-gradient(ellipse 70% 70% at 30% 30%, rgba(24,168,216,.35), transparent 60%),
    linear-gradient(145deg, var(--navy-black), var(--navy));
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  color: #fff; gap: 12px;
  font-size: 100px;
  border: 1px solid rgba(24,168,216,.3);
}
.about-grid .visual .vtag { font-size: 14px; color: #7fd8f5; letter-spacing: 4px; }

.tl { max-width: 760px; margin: 0 auto; position: relative; }
.tl-item { display: flex; gap: 26px; padding-bottom: 36px; position: relative; }
.tl-item::before {
  content: ""; position: absolute;
  left: 13px; top: 32px; bottom: 4px;
  width: 2px;
  background: linear-gradient(var(--brand), var(--border));
}
.tl-item:last-child::before { display: none; }
.tl-item .dot {
  width: 28px; height: 28px; flex-shrink: 0;
  border-radius: 50%;
  background: var(--bg-card);
  border: 3px solid var(--brand);
  display: flex; align-items: center; justify-content: center;
  z-index: 1;
  margin-top: 4px;
}
.tl-item .dot::after { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--brand); }
.tl-item .tl-body .yr { font-size: 15px; font-weight: 800; color: var(--brand); letter-spacing: 1px; }
.tl-item .tl-body h4 { font-size: 17.5px; font-weight: 700; color: var(--navy); margin: 4px 0 6px; }
.tl-item .tl-body p { font-size: 14px; color: var(--text-2); }

/* 荣誉资质 */
.honor-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.honor {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 22px 16px;
  text-align: center;
  box-shadow: var(--shadow);
}
.honor .hi { font-size: 34px; margin-bottom: 8px; }
.honor h4 { font-size: 14.5px; font-weight: 700; color: var(--navy); }
.honor p { font-size: 12px; color: var(--text-3); margin-top: 2px; }

/* ============ 联系我们 ============ */
.contact-grid { display: grid; grid-template-columns: .92fr 1.08fr; gap: 30px; }
.cinfo {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 34px;
  box-shadow: var(--shadow);
}
.cinfo h3 { font-size: 20px; font-weight: 800; color: var(--navy); margin-bottom: 22px; padding-bottom: 14px; border-bottom: 2px solid var(--brand); display: inline-block; }
.ci-row { display: flex; gap: 14px; padding: 13px 0; border-bottom: 1px dashed var(--border); }
.ci-row:last-child { border-bottom: none; }
.ci-row .ic {
  width: 46px; height: 46px; flex-shrink: 0;
  border-radius: 12px;
  background: linear-gradient(145deg, #e8f6fc, #d5eef8);
  display: flex; align-items: center; justify-content: center;
  font-size: 21px;
}
.ci-row .k { font-size: 12.5px; color: var(--text-3); }
.ci-row .v { font-size: 15px; font-weight: 600; color: var(--navy); line-height: 1.5; }

.cform {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 34px;
  box-shadow: var(--shadow);
}
.cform h3 { font-size: 20px; font-weight: 800; color: var(--navy); margin-bottom: 6px; }
.cform .sub { font-size: 13.5px; color: var(--text-3); margin-bottom: 22px; }
.fg { margin-bottom: 16px; }
.fg label { display: block; font-size: 13.5px; font-weight: 600; color: var(--navy); margin-bottom: 6px; }
.fg label .req { color: #e5484d; }
.fg input, .fg select, .fg textarea {
  width: 100%;
  padding: 11px 15px;
  border: 1.5px solid var(--border);
  border-radius: 9px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: #fbfdfe;
  transition: all .25s var(--ease);
}
.fg input:focus, .fg select:focus, .fg textarea:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 4px rgba(24,168,216,.12);
  background: #fff;
}
.fg textarea { min-height: 110px; resize: vertical; }
.f2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.fsubmit {
  width: 100%;
  background: linear-gradient(92deg, var(--brand), var(--brand-deep));
  color: #fff; border: none;
  padding: 14px;
  border-radius: 10px;
  font-size: 16px; font-weight: 700;
  cursor: pointer;
  box-shadow: 0 8px 22px rgba(24,168,216,.35);
  transition: all .3s var(--ease);
}
.fsubmit:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(24,168,216,.45); }

/* ============ CTA ============ */
.cta-band {
  position: relative;
  background:
    radial-gradient(ellipse 60% 100% at 70% 0%, rgba(24,168,216,.35), transparent 60%),
    linear-gradient(130deg, var(--navy-black), var(--navy));
  color: #fff;
  text-align: center;
  padding: 74px 24px;
}
.cta-band h2 { font-size: 32px; font-weight: 800; letter-spacing: 1px; margin-bottom: 12px; }
.cta-band p { color: rgba(255,255,255,.7); font-size: 16px; margin-bottom: 30px; }

/* ============ 页脚 ============ */
.footer { background: var(--navy-black); color: rgba(255,255,255,.66); padding-top: 56px; }
.f-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.4fr; gap: 36px; padding-bottom: 40px; }
.f-col h4 { color: #fff; font-size: 15.5px; font-weight: 700; margin-bottom: 16px; position: relative; padding-bottom: 10px; }
.f-col h4::after { content: ""; position: absolute; left: 0; bottom: 0; width: 26px; height: 2.5px; background: var(--brand); border-radius: 2px; }
.f-col p { font-size: 13.5px; line-height: 1.9; }
.f-col ul li { margin-bottom: 9px; }
.f-col ul li a { color: rgba(255,255,255,.6); font-size: 13.5px; }
.f-col ul li a:hover { color: var(--brand); }
.f-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.f-brand .mark {
  width: 38px; height: 38px; border-radius: 9px;
  background: linear-gradient(135deg, var(--brand), var(--navy));
  color: #fff; font-weight: 800; font-size: 14px;
  display: flex; align-items: center; justify-content: center;
}
.f-brand .nm { color: #fff; font-size: 16px; font-weight: 700; letter-spacing: 1.5px; }
.f-contact li { display: flex; gap: 9px; font-size: 13.5px; margin-bottom: 10px; align-items: flex-start; }
.f-contact li .ic { color: var(--brand); flex-shrink: 0; }
.f-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 18px 0;
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px;
  font-size: 12.5px; color: rgba(255,255,255,.35);
}

/* ============ 动画 ============ */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ============ 响应式 ============ */
@media (max-width: 1080px) {
  .prod-grid { grid-template-columns: repeat(3, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .honor-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 900px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .hero h1 { font-size: 34px; }
  .biz-grid, .sol-grid, .case-grid, .news-grid, .svc-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .about-grid .visual { display: none; }
  .pd-block { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .f-grid { grid-template-columns: 1fr 1fr; }
  .stats-band .container { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .topbar { display: none; }
  .nav-menu {
    display: none;
    position: absolute;
    top: 72px; left: 0; right: 0;
    background: #fff;
    box-shadow: 0 12px 30px rgba(0,0,0,.12);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 16px 18px;
    gap: 2px;
  }
  .nav-menu.open { display: flex; }
  .nav-menu > li > a { padding: 13px 16px; }
  .nav-menu > li > a.active::after { display: none; }
  .nav-menu > li > a.active { background: var(--bg-light); }
  .nav-toggle { display: flex; }

  .section { padding: 56px 0; }
  .sec-head h2 { font-size: 25px; }
  .hero { padding: 70px 0 60px; }
  .hero h1 { font-size: 29px; }
  .biz-grid, .sol-grid, .case-grid, .news-grid, .svc-grid, .prod-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .f2 { grid-template-columns: 1fr; }
  .f-grid { grid-template-columns: 1fr; }
  .honor-grid { grid-template-columns: repeat(2, 1fr); }
  .page-hero h1 { font-size: 26px; }
  .stats-band .st .n { font-size: 30px; }
}