/* =========================================================
   北京国科宏业科技有限公司 · 官网样式
   设计基调：对标 NI 官网 —— 大留白、清晰层级、沉稳蓝色主色
   ========================================================= */

:root {
  --navy-950: #06192e;
  --navy-900: #0a2540;
  --navy-800: #103a63;
  --navy-700: #17508a;
  --blue-600: #1268b3;
  --blue-500: #1b7fd4;
  --blue-100: #d8eaf8;
  --blue-50: #eef6fc;
  --hero-blue: #37719f;
  --ink: #1c2733;
  --ink-2: #46586b;
  --muted: #6b7c8d;
  --line: #e3e9ef;
  --bg-soft: #f4f7fa;
  --white: #ffffff;
  --radius: 10px;
  --shadow-sm: 0 1px 3px rgba(10, 37, 64, .08);
  --shadow-md: 0 10px 30px rgba(10, 37, 64, .12);
  --shadow-lg: 0 24px 60px rgba(10, 37, 64, .22);
  --maxw: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ---------- 顶部工具条 ---------- */
.topbar {
  background: var(--navy-950);
  color: #9fb4c8;
  font-size: 13px;
}
.topbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 34px;
}
.topbar a:hover { color: #fff; }
.topbar .tb-links { display: flex; gap: 22px; }
.topbar .tb-right { display: flex; gap: 18px; align-items: center; }

/* ---------- 主导航 ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .97);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo { display: flex; align-items: center; gap: 12px; }
.logo img { height: 46px; width: auto; }
.logo-text { line-height: 1.25; }
/* 与 LOGO 手写体标志同色（#25418F） */
.logo-text b { display: block; font-size: 23px; color: #25418f; letter-spacing: 1.5px; }
.logo-text span { display: block; font-size: 11px; color: var(--muted); letter-spacing: .4px; }

.nav { display: flex; align-items: center; gap: 14px; }
.nav a {
  padding: 10px 20px;
  font-size: 17px;
  font-weight: 500;
  letter-spacing: .5px;
  color: var(--ink-2);
  border-radius: 6px;
  transition: all .2s;
  position: relative;
}
.nav a:hover { color: var(--blue-600); background: var(--blue-50); }
.nav a.active { color: var(--blue-600); }
.nav a.active::after {
  content: "";
  position: absolute;
  left: 20px; right: 20px; bottom: 2px;
  height: 3px; border-radius: 2px;
  background: var(--blue-600);
}
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 26px;
  border-radius: 6px;
  font-size: 15px; font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all .2s;
  white-space: nowrap;
}
.btn-primary { background: var(--blue-600); color: #fff; }
.btn-primary:hover { background: var(--navy-800); transform: translateY(-1px); box-shadow: 0 8px 20px rgba(16, 58, 99, .3); }

/* 首页 Hero 主按钮：深蓝渐变 + 内高光 + 柔和投影，质感更强 */
.btn-hero {
  background: linear-gradient(135deg, #2a8fe0 0%, #1157a0 55%, #0d4a8c 100%);
  color: #fff;
  border: 1px solid rgba(255,255,255,.28);
  box-shadow: 0 10px 26px rgba(4, 26, 48, .38), inset 0 1px 0 rgba(255,255,255,.35);
  padding: 12px 28px;
  letter-spacing: 1px;
}
.btn-hero:hover {
  background: linear-gradient(135deg, #35a0ef 0%, #1465b5 55%, #0f549c 100%);
  transform: translateY(-2px);
  box-shadow: 0 16px 34px rgba(4, 26, 48, .46), inset 0 1px 0 rgba(255,255,255,.45);
}
.btn-hero:active { transform: translateY(0); box-shadow: 0 6px 16px rgba(4,26,48,.35), inset 0 1px 0 rgba(255,255,255,.3); }
.btn-ghost { border-color: rgba(255,255,255,.55); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.12); }
.btn-outline { border-color: var(--blue-600); color: var(--blue-600); background: transparent; }
.btn-outline:hover { background: var(--blue-600); color: #fff; }
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn-xs { padding: 6px 14px; font-size: 13px; font-weight: 500; }

/* 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-900); margin: 5px 0; transition: .2s; }

/* ---------- 页面 Banner（内页） ---------- */
.page-banner {
  background:
    linear-gradient(115deg, rgba(6,25,46,.94) 0%, rgba(10,37,64,.88) 45%, rgba(18,104,179,.55) 100%),
    repeating-linear-gradient(90deg, transparent 0 119px, rgba(255,255,255,.05) 119px 120px),
    repeating-linear-gradient(0deg, transparent 0 79px, rgba(255,255,255,.04) 79px 80px);
  color: #fff;
  padding: 72px 0 64px;
}
.page-banner h1 { font-size: 38px; font-weight: 700; letter-spacing: 2px; }
.page-banner .crumb { margin-top: 10px; font-size: 14px; color: #9fb4c8; }
.page-banner .crumb a:hover { color: #fff; }
.page-banner .sub { margin-top: 12px; max-width: 720px; color: #c9d9e8; font-size: 16px; }

/* ---------- Hero（首页 · 复刻原官网横幅） ---------- */
.hero {
  background: var(--hero-blue);
  position: relative;
  overflow: hidden;
  /* 大图整体圆角倒角：左下 + 右上，更圆润灵动 */
  margin: 18px 28px 0;
  border-radius: 0 75px 0 75px;
}
.hero-bg { display: block; width: 100%; height: auto; }
.hero-inner {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
}
.hero-inner .container { width: 100%; }
.hero-txt { max-width: 46%; color: #fff; position: relative; z-index: 2; }
.hero-txt .hero-tag {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid rgba(255,255,255,.35);
  border-radius: 999px;
  padding: 4px 13px;
  font-size: 12px; letter-spacing: 2px;
  color: #dbe8f4;
  margin-bottom: 14px;
}
.hero-txt .hero-tag i { width: 7px; height: 7px; border-radius: 50%; background: #7db9ea; box-shadow: 0 0 10px #7db9ea; }
.hero-txt h1 { font-size: clamp(22px, 2.3vw, 34px); line-height: 1.34; font-weight: 700; letter-spacing: 1px; text-shadow: 0 2px 12px rgba(6,25,46,.25); }
.hero-txt p.lead { margin-top: 10px; font-size: clamp(12.5px, 1vw, 15px); color: #e2edf7; max-width: 30em; }
.hero-actions { margin-top: 20px; display: flex; gap: 14px; flex-wrap: wrap; }
/* 两个按钮统一形式，字号放大一号 */
.hero-actions .btn { padding: 11px 30px; font-size: 17px; letter-spacing: 1px; }

/* ---------- 通用 Section ---------- */
.section { padding: 84px 0; }
.section.soft { background: var(--bg-soft); }
.sec-head { text-align: center; max-width: 760px; margin: 0 auto 54px; }
.sec-head .kicker {
  display: inline-block;
  color: var(--blue-600);
  font-size: 13.5px; font-weight: 700; letter-spacing: 3px;
  margin-bottom: 12px;
}
/* 放大版小标题（如联系页「优先联系」） */
.kicker-lg { font-size: 19px; letter-spacing: 6px; }

/* 毛笔标题字体：志莽行书（Zhi Mang Xing，SIL OFL 1.1 授权，商用免费）
   仅嵌入本页用到的 9 个字，字体文件为子集化后的 woff2（assets/fonts/，含 FONT-LICENSE.txt） */
@font-face {
  font-family: 'GK Brush';
  src: url('../fonts/gk-brush.woff2') format('woff2');
  font-display: swap;
  font-weight: 400;
  font-style: normal;
}
.kicker-brush {
  display: inline-block;
  font-family: 'GK Brush', 'STKaiti', 'KaiTi', serif;
  font-size: 27px;          /* 比「王经理」(22px) 大 5 号 */
  line-height: 1.35;
  letter-spacing: 4px;
  color: var(--navy-900);
  padding-bottom: 6px;
  border-bottom: 2px solid rgba(18, 104, 179, .18);
}
.sec-head h2 { font-size: 34px; color: var(--navy-900); letter-spacing: 1px; line-height: 1.3; }
.sec-head p { margin-top: 14px; color: var(--muted); font-size: 16px; }
.sec-head.left { text-align: left; margin-left: 0; }

/* ---------- 核心能力卡片（图标与文字居中） ---------- */
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }

.cap-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 26px 30px;
  transition: all .25s;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cap-card::after {
  content: "";
  position: absolute; left: 50%; bottom: 0;
  width: 0; height: 3px;
  background: var(--blue-600);
  transform: translateX(-50%);
  transition: width .3s;
}
.cap-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: transparent; }
.cap-card:hover::after { width: 60%; }
.cap-card .icon {
  width: 52px; height: 52px; border-radius: 50%;
  background: var(--blue-50);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 18px;
}
.cap-card .icon svg { width: 26px; height: 26px; }
.cap-card h3 { font-size: 18px; color: var(--navy-900); margin-bottom: 10px; }
.cap-card p { font-size: 14.5px; color: var(--muted); }

/* ---------- 产品分类卡 ---------- */
.cat-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  transition: all .25s;
  display: flex; flex-direction: column;
}
.cat-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.cat-card .thumb {
  aspect-ratio: 4/3;
  overflow: hidden;
  background: #fff;
  display: flex; align-items: center; justify-content: center;
}
.cat-card .thumb img {
  width: 100%; height: 100%;
  object-fit: contain;
  padding: 18px;
  transition: transform .4s;
}
.cat-card:hover .thumb img { transform: scale(1.04); }
.cat-card .body { padding: 22px 24px 26px; flex: 1; display: flex; flex-direction: column; }
.cat-card h3 { font-size: 18.5px; color: var(--navy-900); }
.cat-card p { margin-top: 8px; font-size: 14px; color: var(--muted); flex: 1; }
.cat-card .more {
  margin-top: 16px; color: var(--blue-600); font-size: 14px; font-weight: 600;
  display: inline-flex; align-items: center; gap: 6px;
}
.cat-card .more:hover { gap: 10px; transition: gap .2s; }

/* ---------- 产品卡片 ---------- */
.prod-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex; flex-direction: column;
  transition: all .25s;
}
.prod-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: transparent; }
.prod-card .thumb {
  aspect-ratio: 4/3;
  background: #fff;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden; position: relative;
  border-bottom: 1px solid var(--line);
}
.prod-card .thumb img { width: 100%; height: 100%; object-fit: contain; padding: 18px; transition: transform .35s; }
.prod-card:hover .thumb img { transform: scale(1.04); }
.prod-card .thumb .ph {
  text-align: center; color: var(--navy-700); padding: 20px;
}
.prod-card .thumb .ph .gk {
  font-size: 30px; font-weight: 800; letter-spacing: 1px;
  background: linear-gradient(120deg, var(--blue-600), var(--navy-800));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  display: block; margin-bottom: 4px;
}
.prod-card .thumb .ph small { color: #8ba3b8; font-size: 12px; letter-spacing: 2px; }
.prod-card .body { padding: 20px 22px 22px; flex: 1; display: flex; flex-direction: column; }
.prod-card .cat-chip {
  align-self: flex-start;
  font-size: 12px; color: var(--blue-600);
  background: var(--blue-50);
  padding: 3px 10px; border-radius: 999px;
  margin-bottom: 10px;
}
.prod-card h3 { font-size: 16.5px; color: var(--navy-900); line-height: 1.45; }
.prod-card p { margin-top: 8px; font-size: 13.5px; color: var(--muted); flex: 1; }
.prod-card .foot {
  margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; align-items: center;
}
.prod-card .foot a { color: var(--blue-600); font-size: 14px; font-weight: 600; }
.prod-card .foot a:hover { text-decoration: underline; }

/* 分类筛选 Tabs */
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 44px; }
.filter-bar button {
  padding: 9px 22px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink-2);
  border-radius: 999px;
  font-size: 14.5px; cursor: pointer;
  transition: all .2s;
}
.filter-bar button:hover { border-color: var(--blue-500); color: var(--blue-600); }
.filter-bar button.on { background: var(--blue-600); border-color: var(--blue-600); color: #fff; }

/* ---------- 数字统计 ---------- */
.stats-band { background: linear-gradient(120deg, var(--navy-900), var(--navy-800)); color: #fff; }
.stats-band .container { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding-top: 56px; padding-bottom: 56px; }
.stat { text-align: center; position: relative; }
.stat + .stat::before {
  content: ""; position: absolute; left: 0; top: 14%; bottom: 14%; width: 1px;
  background: rgba(255,255,255,.16);
}
.stat .num { font-size: 42px; font-weight: 800; letter-spacing: 1px; }
.stat .num span { font-size: 20px; font-weight: 600; margin-left: 4px; color: #7fb9e8; }
.stat .label { margin-top: 6px; color: #a8bfd4; font-size: 14.5px; letter-spacing: 1px; }

/* ---------- 应用领域 ---------- */
.field-item {
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  aspect-ratio: 4/3;
  display: flex; align-items: flex-end;
  color: #fff;
  background-size: cover; background-position: center;
  box-shadow: var(--shadow-sm);
}
.field-item::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(6,25,46,.05) 35%, rgba(6,25,46,.88));
}
.field-item .body { position: relative; z-index: 1; padding: 20px 22px; }
.field-item h3 { font-size: 19px; }
.field-item p { font-size: 13.5px; color: #cfdcea; margin-top: 4px; }

/* ---------- 系统集成（PXI 系统搭建） ---------- */
.sys-section {
  background:
    radial-gradient(900px 420px at 80% -10%, rgba(27,127,212,.30), transparent 60%),
    linear-gradient(150deg, var(--navy-950) 0%, var(--navy-900) 60%, #0d3054 130%);
  color: #fff;
}
.sys-section .kicker { color: #7db9ea; }
.sys-section h2 { color: #fff; }
.sys-section .sec-head p { color: #a8bfd4; }

.sys-diagram {
  background: rgba(255,255,255,.035);
  border: 1px solid rgba(255,255,255,.09);
  border-radius: 16px;
  padding: 34px 30px 22px;
  margin-bottom: 30px;
  box-shadow: inset 0 0 60px rgba(18,104,179,.12);
}
.sys-diagram svg { width: 100%; height: auto; display: block; }
.sys-diagram .dg-note {
  display: flex; justify-content: center; gap: 26px; flex-wrap: wrap;
  margin-top: 18px; font-size: 12.5px; color: #8fa9c2;
}
.sys-diagram .dg-note span { display: inline-flex; align-items: center; gap: 7px; }
.sys-diagram .dg-note i { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }

.sys-card {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 14px;
  padding: 30px 28px;
  transition: all .25s;
  height: 100%;
}
.sys-card:hover { transform: translateY(-4px); background: rgba(255,255,255,.08); border-color: rgba(125,185,234,.4); }
.sys-card .no {
  font-size: 13px; font-weight: 700; letter-spacing: 3px; color: #7db9ea;
  display: inline-flex; align-items: center; gap: 10px;
}
.sys-card .no::after { content: ""; width: 42px; height: 1px; background: rgba(125,185,234,.5); }
.sys-card h3 { font-size: 19px; margin: 12px 0 10px; letter-spacing: 1px; }
.sys-card p { font-size: 14px; color: #a8bfd4; }
.sys-card .chips { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 8px; }
.sys-card .chips span {
  font-size: 12px; color: #bcd6ec;
  border: 1px solid rgba(125,185,234,.35);
  border-radius: 999px; padding: 3px 11px;
}

.sys-scene { margin-top: 34px; text-align: center; }
.sys-scene .lbl { font-size: 13px; letter-spacing: 3px; color: #7db9ea; font-weight: 700; }
.sys-scene .chips { margin-top: 14px; display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; }
.sys-scene .chips span {
  font-size: 13.5px; color: #dbe8f4;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 999px; padding: 8px 20px;
}

/* ---------- CTA 横幅 ---------- */
.cta-band {
  background:
    radial-gradient(800px 300px at 15% 120%, rgba(27,127,212,.35), transparent 60%),
    linear-gradient(115deg, var(--navy-950), var(--navy-800));
  color: #fff;
  border-radius: 16px;
  padding: 52px 56px;
  display: flex; align-items: center; justify-content: space-between; gap: 30px;
  flex-wrap: wrap;
}
.cta-band h2 { font-size: 28px; letter-spacing: 1px; }
.cta-band p { color: #b9cbdc; margin-top: 8px; font-size: 15.5px; }

/* ---------- 关于页 ---------- */
.about-lede { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.about-lede .txt h2 { font-size: 30px; color: var(--navy-900); margin-bottom: 18px; }
.about-lede .txt p { color: var(--ink-2); margin-bottom: 14px; text-align: justify; text-indent: 2em; }
.about-lede .pic { border-radius: 14px; overflow: hidden; box-shadow: var(--shadow-md); }
.about-lede .pic img { width: 100%; }

.timeline { position: relative; padding-left: 30px; }
.timeline::before {
  content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px;
  background: var(--blue-100);
}
.tl-item { position: relative; padding-bottom: 30px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: ""; position: absolute; left: -30px; top: 7px;
  width: 16px; height: 16px; border-radius: 50%;
  background: #fff; border: 3px solid var(--blue-600);
}
.tl-item .year { font-size: 20px; font-weight: 800; color: var(--blue-600); }
.tl-item h4 { font-size: 16.5px; color: var(--navy-900); margin-top: 2px; }
.tl-item p { font-size: 14px; color: var(--muted); margin-top: 4px; }

.value-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px 26px; transition: all .25s;
}
.value-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.value-card .no { font-size: 15px; font-weight: 800; color: var(--blue-600); letter-spacing: 2px; }
.value-card h3 { font-size: 18px; color: var(--navy-900); margin: 8px 0 10px; }
.value-card p { font-size: 14.5px; color: var(--muted); }

/* ---------- 联系页 ---------- */
/* 第一优先：区域经理直线 */
.person-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; margin-bottom: 22px; }
.person-card {
  display: flex; align-items: center;
  background: linear-gradient(135deg, #ffffff, #f5fafe);
  border: 1px solid #cfe2f3;
  border-left: 4px solid var(--blue-600);
  border-radius: 12px;
  padding: 30px 36px;
  box-shadow: var(--shadow-sm);
  transition: all .25s;
}
.person-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.person-card .meta { flex: 1; }
.person-card .region {
  display: inline-block;
  font-size: 13px; color: var(--blue-600);
  background: var(--blue-50);
  padding: 3px 12px; border-radius: 999px;
  letter-spacing: 1px;
}
.person-card .meta .who { font-size: 22px; font-weight: 700; color: var(--navy-900); margin-top: 12px; }
.person-card .meta .tel {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: 10px; font-size: 24px; font-weight: 800; letter-spacing: .5px;
  color: var(--blue-600);
  font-variant-numeric: tabular-nums;
}
.person-card .meta .tel:hover { color: var(--navy-800); }

.contact-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.contact-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px 24px; text-align: center; transition: all .25s;
}
.contact-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.contact-card .icon {
  width: 54px; height: 54px; margin: 0 auto 16px;
  border-radius: 12px; background: var(--blue-50);
  display: flex; align-items: center; justify-content: center;
}
.contact-card .icon svg { width: 26px; height: 26px; }
.contact-card h4 { font-size: 15px; color: var(--muted); font-weight: 500; }
.contact-card p { font-size: 16px; color: var(--navy-900); font-weight: 600; margin-top: 6px; word-break: break-all; }
.contact-card p small { display: block; font-weight: 400; color: var(--muted); font-size: 13px; margin-top: 2px; }

.form-wrap { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: start; }
.form-card {
  background: #fff; border: 1px solid var(--line); border-radius: 14px;
  padding: 36px 38px; box-shadow: var(--shadow-sm);
}
.form-card .tip { font-size: 14px; color: var(--muted); margin-bottom: 24px; }
.f-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.f-group { margin-bottom: 18px; }
.f-group label { display: block; font-size: 14px; color: var(--ink-2); margin-bottom: 7px; font-weight: 500; }
.f-group label i { color: #d64c4c; font-style: normal; margin-left: 2px; }
.f-group input, .f-group textarea {
  width: 100%;
  border: 1px solid #cfd9e2;
  border-radius: 7px;
  padding: 11px 14px;
  font-size: 15px;
  font-family: inherit;
  color: var(--ink);
  background: #fbfdfe;
  transition: border-color .2s, box-shadow .2s;
}
.f-group input:focus, .f-group textarea:focus {
  outline: none;
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(27,127,212,.14);
  background: #fff;
}
.f-group input.err, .f-group textarea.err { border-color: #d64c4c; }
.f-group .err-msg { display: none; font-size: 12.5px; color: #d64c4c; margin-top: 5px; }
.f-group.has-err .err-msg { display: block; }
.form-ok {
  display: none;
  background: #eef9f1; border: 1px solid #bfe6cb; color: #1e7d3c;
  border-radius: 8px; padding: 12px 16px; font-size: 14.5px; margin-bottom: 18px;
}
.form-warn {
  display: none;
  background: #fff7e8; border: 1px solid #f0d8a8; color: #8a5c10;
  border-radius: 8px; padding: 12px 16px; font-size: 14.5px; margin-bottom: 18px;
  line-height: 1.7;
}
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.side-info h3 { font-size: 20px; color: var(--navy-900); margin-bottom: 18px; }
.side-info .item { display: flex; gap: 14px; padding: 16px 0; border-bottom: 1px dashed var(--line); }
.side-info .item:last-child { border-bottom: none; }
.side-info .item .ico {
  flex: none; width: 42px; height: 42px; border-radius: 10px;
  background: var(--blue-50); color: var(--blue-600);
  display: flex; align-items: center; justify-content: center; font-size: 19px;
}
.side-info .item b { display: block; font-size: 14px; color: var(--ink-2); font-weight: 500; }
.side-info .item p { font-size: 15px; color: var(--navy-900); margin-top: 2px; }

/* ---------- Footer ---------- */
.footer { background: var(--navy-950); color: #93a9bd; margin-top: 0; }
.footer .top {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px; padding: 56px 0 44px;
}
.footer h5 { color: #fff; font-size: 16px; margin-bottom: 18px; letter-spacing: 1px; }
.footer a:hover { color: #fff; }
.footer .f-list li { margin-bottom: 10px; font-size: 14px; }
.footer .f-about p { font-size: 14px; line-height: 1.8; max-width: 340px; }
.footer .f-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.footer .f-logo img { height: 38px; width: auto; }
.footer .f-logo b { color: #fff; font-size: 18px; letter-spacing: 1px; }
.footer .f-contact li { display: flex; gap: 10px; margin-bottom: 12px; font-size: 14px; }
.footer .f-contact span { color: #68849e; flex: none; }
.footer .bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 20px 0;
  font-size: 13px;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
}

/* ---------- 动效 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 产品详情页 ---------- */
.page-banner.slim { padding: 44px 0 40px; }
.page-banner.slim h1 { font-size: 28px; }

.detail-top { display: grid; grid-template-columns: 1fr 1.05fr; gap: 48px; align-items: start; }
.detail-gallery { position: sticky; top: 96px; }
.detail-shot {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  aspect-ratio: 4/3;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.detail-shot img { width: 100%; height: 100%; object-fit: contain; padding: 28px; }
.detail-shot .ph { text-align: center; color: var(--navy-700); }
.detail-shot .ph .gk {
  font-size: 56px; font-weight: 800;
  background: linear-gradient(120deg, var(--blue-600), var(--navy-800));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  display: block;
}
.detail-shot .ph small { color: #8ba3b8; font-size: 14px; letter-spacing: 3px; }
.detail-badges { margin-top: 14px; display: flex; gap: 10px; flex-wrap: wrap; }
.detail-badges span {
  font-size: 12.5px; color: var(--blue-600);
  background: var(--blue-50); border-radius: 999px; padding: 4px 14px;
}
.detail-info .cat-chip {
  display: inline-block;
  font-size: 12.5px; color: var(--blue-600);
  background: var(--blue-50);
  padding: 3px 12px; border-radius: 999px;
  margin-bottom: 12px;
}
.detail-info h2 { font-size: 27px; color: var(--navy-900); line-height: 1.4; }
.detail-summary { margin-top: 12px; color: var(--ink-2); font-size: 15.5px; }
.detail-specs { margin-top: 18px; border-top: 1px solid var(--line); }
.detail-specs li {
  padding: 9px 2px 9px 22px;
  border-bottom: 1px dashed var(--line);
  font-size: 14.5px; color: var(--ink-2);
  position: relative;
}
.detail-specs li::before {
  content: ""; position: absolute; left: 2px; top: 17px;
  width: 7px; height: 7px; border-radius: 2px; background: var(--blue-500);
}
.detail-actions { margin-top: 26px; display: flex; gap: 14px; flex-wrap: wrap; }
.detail-nav { margin-top: 30px; border-top: 1px solid var(--line); padding-top: 16px; display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; }
.detail-nav a { font-size: 13.5px; color: var(--muted); max-width: 48%; }
.detail-nav a:hover { color: var(--blue-600); }

.detail-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.detail-desc h3, .detail-params h3 {
  font-size: 19px; color: var(--navy-900); margin-bottom: 16px;
  padding-left: 12px; border-left: 3px solid var(--blue-600);
}
.detail-desc p { color: var(--ink-2); font-size: 15px; margin-bottom: 12px; text-align: justify; text-indent: 2em; }
.spec-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 10px; overflow: hidden; box-shadow: var(--shadow-sm); }
.spec-table th, .spec-table td { padding: 11px 16px; font-size: 14px; border-bottom: 1px solid var(--line); text-align: left; }
.spec-table tr:last-child th, .spec-table tr:last-child td { border-bottom: none; }
.spec-table th { width: 38%; color: var(--muted); font-weight: 500; background: #f8fafc; }
.spec-table td { color: var(--navy-900); font-weight: 500; }

/* 资料下载卡片 */
.dl-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.dl-card {
  display: flex; align-items: center; gap: 16px;
  background: #fff; border: 1px solid var(--line); border-radius: 10px;
  padding: 16px 18px; transition: all .2s;
}
.dl-card:hover { border-color: var(--blue-500); box-shadow: var(--shadow-sm); transform: translateY(-2px); }
.dl-ico {
  flex: none; width: 44px; height: 44px; border-radius: 9px;
  background: #e8f1f9; color: var(--blue-600);
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 800; letter-spacing: .5px;
}
.dl-name { flex: 1; font-size: 14px; color: var(--navy-900); line-height: 1.5; }
.dl-ico svg { width: 21px; height: 21px; }
.dl-meta { flex: 1; min-width: 0; }
.dl-meta h4 { font-size: 14.5px; font-weight: 600; color: var(--navy-900); line-height: 1.45; }
.dl-meta p { font-size: 12.5px; color: var(--muted); margin-top: 4px; }
.dl-btn {
  flex: none; font-size: 13px; font-weight: 600; color: var(--blue-600);
  border: 1px solid var(--blue-600); border-radius: 6px; padding: 6px 16px;
  transition: all .2s;
}
.dl-card:hover .dl-btn { background: var(--blue-600); color: #fff; }
.dl-empty {
  grid-column: 1/-1;
  background: var(--bg-soft); border: 1px dashed var(--line); border-radius: 10px;
  padding: 22px; text-align: center; color: var(--muted); font-size: 14.5px;
}
.dl-empty a { color: var(--blue-600); font-weight: 600; }
.dl-more-tip { margin-top: 18px; text-align: center; font-size: 13.5px; color: var(--muted); }
.dl-more-tip a { color: var(--blue-600); }

/* ---------- 合作伙伴 logo 墙 ---------- */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.partner-card {
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  padding: 26px; display: flex; align-items: center; justify-content: center;
  filter: grayscale(15%); opacity: .92;
  transition: all .25s;
}
.partner-card:hover { filter: none; opacity: 1; box-shadow: var(--shadow-md); transform: translateY(-3px); }
.partner-card img { max-height: 88px; object-fit: contain; }

/* ---------- 数字滚动动画 ---------- */
.stat .num .stat-num { display: inline-block; }
.stat .num .plus { font-size: 16px; letter-spacing: 0; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .person-grid { grid-template-columns: 1fr; }
  .stats-band .container { grid-template-columns: repeat(2, 1fr); row-gap: 34px; }
  .stat:nth-child(3)::before { display: none; }
  .about-lede, .form-wrap { grid-template-columns: 1fr; }
  .footer .top { grid-template-columns: 1fr 1fr; }
  .detail-top, .detail-cols { grid-template-columns: 1fr; }
  .detail-gallery { position: static; }
}
@media (max-width: 1180px) and (min-width: 701px) {
  .nav { gap: 2px; }
  .nav a { font-size: 14.5px; padding: 8px 10px; }
  .nav a.active::after { left: 10px; right: 10px; }
  .logo-text b { font-size: 19px; letter-spacing: 1px; }
}
@media (max-width: 860px) {
  /* 首页 Hero 改为上文下图，避免文字与产品图交叠 */
  .hero { background: var(--hero-blue); margin: 12px 14px 0; border-radius: 0 40px 0 40px; }
  .hero-inner { position: static; display: block; padding: 44px 0 36px; }
  .hero-txt { max-width: 100%; padding: 0 24px; }
  .hero-txt h1 { font-size: 28px; }
  .hero-txt p.lead { font-size: 14.5px; }
  .hero-bg { width: 100%; }
}
@media (max-width: 700px) {
  .nav {
    position: absolute; top: 100%; left: 0; right: 0;
    background: #fff; flex-direction: column; align-items: stretch;
    padding: 10px 20px 18px; gap: 4px;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-md);
    display: none;
  }
  .nav.open { display: flex; }
  .nav-toggle { display: block; }
  .header .btn { display: none; }
  .topbar .tb-links { display: none; }
  .hero-txt h1 { font-size: 25px; }
  .grid-4, .grid-3, .grid-2, .f-row { grid-template-columns: 1fr; }
  .stats-band .container { grid-template-columns: repeat(2, 1fr); }
  .stat + .stat::before { display: none; }
  .page-banner h1 { font-size: 29px; }
  .section { padding: 60px 0; }
  .cta-band { padding: 36px 28px; }
  .footer .top { grid-template-columns: 1fr; gap: 30px; }
  .sys-diagram { padding: 20px 14px 14px; }
  .partner-grid { grid-template-columns: repeat(2, 1fr); }
  .partner-card { padding: 16px; }
  .partner-card img { max-height: 64px; }
  .dl-grid { grid-template-columns: 1fr; }
}