:root {
  --navy-950: #050b18;
  --navy-900: #08142a;
  --navy-800: #0d1d3a;
  --navy-700: #142a52;
  --blue: #2f7bff;
  --blue-light: #6aa6ff;
  --blue-deep: #1a5ad8;
  --ink: #0d1d3a;
  --text: #46546a;
  --muted: #8592a6;
  --line: #e4e9f0;
  --line-dark: rgba(255, 255, 255, .1);
  --bg-light: #f4f7fb;
  --header-h: 80px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--text); background: #fff; line-height: 1.75; -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font: inherit; }
section[id] { scroll-margin-top: 90px; }

.container { width: 100%; max-width: 1240px; margin: 0 auto; padding: 0 40px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px; height: 52px; padding: 0 32px;
  border-radius: 999px; font-size: 15px; font-weight: 600; border: 1px solid transparent; cursor: pointer;
  transition: all .3s var(--ease);
}
.btn .arrow { transition: transform .3s var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }
.btn-primary { background: var(--blue); color: #fff; box-shadow: 0 10px 30px rgba(47, 123, 255, .35); }
.btn-primary:hover { background: var(--blue-deep); }
.btn-line { border-color: rgba(255, 255, 255, .3); color: #fff; }
.btn-line:hover { border-color: #fff; background: rgba(255, 255, 255, .08); }
.btn-dark { background: var(--navy-800); color: #fff; }
.btn-dark:hover { background: var(--blue); }
.link-more { display: inline-flex; align-items: center; gap: 8px; color: var(--blue); font-size: 15px; font-weight: 500; }
.link-more .arrow { transition: transform .3s var(--ease); }
.link-more:hover .arrow { transform: translateX(4px); }

/* ---------- 顶部导航 ---------- */
.header { position: fixed; inset: 0 0 auto 0; z-index: 100; height: var(--header-h); color: #fff; transition: background .35s, height .35s, box-shadow .35s; }
.header.scrolled { background: rgba(8, 20, 42, .95); backdrop-filter: blur(12px); height: 68px; box-shadow: 0 6px 30px rgba(0, 0, 0, .25); }
.header-inner { height: 100%; display: flex; align-items: center; gap: 40px; }
.logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.logo img { width: 40px; height: 40px; border-radius: 10px; }
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-text b { font-size: 20px; letter-spacing: 2px; color: #fff; }
.logo-text small { font-size: 10px; letter-spacing: 1.5px; color: rgba(255, 255, 255, .5); }
.nav { display: flex; gap: 6px; margin-left: auto; }
.nav a { padding: 8px 18px; border-radius: 999px; font-size: 15px; color: rgba(255, 255, 255, .78); transition: color .25s, background .25s; }
.nav a:hover { color: #fff; }
.nav a.active { color: #fff; background: rgba(255, 255, 255, .1); }
.header-cta { height: 40px; padding: 0 22px; font-size: 14px; }
.menu-toggle { display: none; margin-left: auto; width: 44px; height: 44px; background: none; border: 0; cursor: pointer; }
.menu-toggle span { display: block; width: 24px; height: 2px; margin: 6px auto; background: #fff; transition: .3s; }
.menu-toggle.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ---------- 首屏 ---------- */
.hero {
  position: relative; min-height: 100vh; padding: calc(var(--header-h) + 60px) 0 100px; display: flex; align-items: center;
  color: #fff; overflow: hidden;
  background: radial-gradient(800px 600px at 72% 45%, rgba(47, 123, 255, .35), transparent 70%), radial-gradient(500px 400px at 10% 100%, rgba(26, 90, 216, .25), transparent 70%), var(--navy-950);
}
.hero::before, .page-banner::before, .cta::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  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: 72px 72px;
  -webkit-mask-image: radial-gradient(circle at 60% 50%, #000 20%, transparent 80%); mask-image: radial-gradient(circle at 60% 50%, #000 20%, transparent 80%);
}
.hero-inner { position: relative; display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: center; }
.kicker { display: inline-flex; align-items: center; gap: 10px; padding: 6px 16px; border: 1px solid rgba(106, 166, 255, .35); border-radius: 999px; font-size: 13px; color: var(--blue-light); margin-bottom: 28px; background: rgba(47, 123, 255, .08); }
.kicker i { width: 8px; height: 8px; border-radius: 50%; background: #3ddc97; box-shadow: 0 0 0 4px rgba(61, 220, 151, .2); }
.hero h1 { font-size: clamp(36px, 5vw, 64px); line-height: 1.22; letter-spacing: 2px; margin-bottom: 24px; }
.hero h1 em { font-style: normal; background: linear-gradient(90deg, var(--blue-light), #9cc4ff); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-desc { font-size: 18px; color: rgba(255, 255, 255, .68); max-width: 540px; margin-bottom: 40px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-visual { position: relative; display: flex; justify-content: center; }
.hero-visual .watch { width: min(340px, 72%); filter: drop-shadow(0 40px 60px rgba(0, 0, 0, .5)); animation: float 7s ease-in-out infinite; }
.hero-visual::before { content: ""; position: absolute; left: 50%; top: 50%; width: 420px; height: 420px; transform: translate(-50%, -50%); border-radius: 50%; border: 1px solid rgba(106, 166, 255, .2); box-shadow: 0 0 0 60px rgba(47, 123, 255, .04), 0 0 0 120px rgba(47, 123, 255, .025); }
.float-card {
  position: absolute; display: flex; align-items: center; gap: 12px; padding: 12px 18px; border-radius: 16px;
  background: rgba(13, 29, 58, .75); border: 1px solid rgba(255, 255, 255, .12); backdrop-filter: blur(12px);
  font-size: 13px; color: rgba(255, 255, 255, .65); line-height: 1.4; animation: float 6s ease-in-out infinite;
}
.float-card b { display: block; font-size: 18px; color: #fff; }
.float-card .ic { width: 36px; height: 36px; border-radius: 10px; display: grid; place-items: center; }
.float-card .ic svg { width: 20px; height: 20px; fill: none; stroke: #fff; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.fc-1 { left: 0; top: 14%; } .fc-1 .ic { background: #ff5a6e; }
.fc-2 { right: 0; top: 42%; animation-delay: -2s; } .fc-2 .ic { background: var(--blue); }
.fc-3 { left: 6%; bottom: 8%; animation-delay: -4s; } .fc-3 .ic { background: #7c5cff; }
@keyframes float { 50% { transform: translateY(-14px); } }
.ecg-line { stroke-dasharray: 300; stroke-dashoffset: 300; animation: ecg 3s linear infinite; }
@keyframes ecg { to { stroke-dashoffset: -300; } }

/* ---------- 通用区块 ---------- */
.section { padding: 120px 0; }
.section-light { background: var(--bg-light); }
.section-dark { position: relative; background: var(--navy-900); color: rgba(255, 255, 255, .7); }
.sec-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 32px; margin-bottom: 60px; }
.sec-head.center { flex-direction: column; align-items: center; text-align: center; }
.sec-en { font-size: 13px; font-weight: 600; letter-spacing: 3px; color: var(--blue); text-transform: uppercase; margin-bottom: 12px; }
.section-dark .sec-en { color: var(--blue-light); }
.sec-title { font-size: clamp(28px, 3.2vw, 42px); line-height: 1.3; color: var(--ink); letter-spacing: 1px; }
.section-dark .sec-title { color: #fff; }
.sec-sub { margin-top: 16px; max-width: 620px; color: var(--muted); }
.section-dark .sec-sub { color: rgba(255, 255, 255, .55); }

/* ---------- 监测能力 ---------- */
.metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.metric { padding: 40px 36px; border-radius: 20px; background: #fff; border: 1px solid var(--line); transition: transform .35s var(--ease), box-shadow .35s, border-color .35s; }
.metric:hover { transform: translateY(-6px); box-shadow: 0 24px 48px rgba(13, 29, 58, .1); border-color: transparent; }
.metric-ic { width: 56px; height: 56px; border-radius: 16px; display: grid; place-items: center; margin-bottom: 24px; }
.metric-ic svg { width: 28px; height: 28px; fill: none; stroke: #fff; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.metric h3 { font-size: 20px; color: var(--ink); margin-bottom: 10px; }
.metric p { font-size: 15px; color: var(--muted); }
.c-red { background: linear-gradient(135deg, #ff7a8a, #ff4d63); }
.c-blue { background: linear-gradient(135deg, #5ea2ff, #2f7bff); }
.c-purple { background: linear-gradient(135deg, #9b85ff, #6a4cff); }
.c-orange { background: linear-gradient(135deg, #ffb35c, #ff8a1f); }
.c-green { background: linear-gradient(135deg, #5fe0a8, #20b97a); }
.c-cyan { background: linear-gradient(135deg, #5ad8f0, #13a8cf); }
.note { margin-top: 32px; font-size: 13px; color: var(--muted); text-align: center; }
.section-dark .note { color: rgba(255, 255, 255, .4); }

/* ---------- 产品卡片 ---------- */
.products { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.product { display: flex; flex-direction: column; border-radius: 24px; overflow: hidden; background: #fff; border: 1px solid var(--line); transition: transform .35s var(--ease), box-shadow .35s; }
.product:hover { transform: translateY(-8px); box-shadow: 0 30px 60px rgba(13, 29, 58, .12); }
.product.hide { display: none; }
.product-cover { position: relative; height: 300px; display: grid; place-items: center; background: radial-gradient(260px 220px at 50% 55%, rgba(47, 123, 255, .35), transparent 70%), linear-gradient(160deg, var(--navy-700), var(--navy-950)); }
.product-cover .watch { height: 230px; width: auto; transition: transform .5s var(--ease); }
.product:hover .product-cover .watch { transform: scale(1.06) rotate(-3deg); }
.product-cover .tag { position: absolute; left: 20px; top: 20px; padding: 4px 12px; border-radius: 999px; background: rgba(255, 255, 255, .12); color: #fff; font-size: 12px; backdrop-filter: blur(6px); }
.product-body { flex: 1; display: flex; flex-direction: column; padding: 30px 30px 32px; }
.product h3 { font-size: 22px; color: var(--ink); margin-bottom: 8px; }
.product p { font-size: 15px; color: var(--muted); margin-bottom: 20px; }
.product ul { margin-top: auto; display: flex; flex-wrap: wrap; gap: 8px; }
.product li { font-size: 12px; padding: 3px 12px; border-radius: 999px; background: #eef4ff; color: var(--blue-deep); }

/* ---------- 应用场景 ---------- */
.scenes { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.scene { padding: 36px 30px; border-radius: 20px; border: 1px solid var(--line-dark); background: rgba(255, 255, 255, .03); transition: background .35s, border-color .35s; }
.scene:hover { background: rgba(47, 123, 255, .1); border-color: rgba(106, 166, 255, .4); }
.scene svg { width: 40px; height: 40px; fill: none; stroke: var(--blue-light); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; margin-bottom: 24px; }
.scene h3 { font-size: 19px; color: #fff; margin-bottom: 10px; }
.scene p { font-size: 14px; color: rgba(255, 255, 255, .55); }

/* ---------- 系统架构（手表 + App + 云） ---------- */
.system { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; align-items: stretch; gap: 20px; }
.sys-item { padding: 40px 32px; border-radius: 20px; background: #fff; border: 1px solid var(--line); text-align: center; }
.sys-item .metric-ic { margin: 0 auto 22px; }
.sys-item h3 { font-size: 20px; color: var(--ink); margin-bottom: 10px; }
.sys-item p { font-size: 15px; color: var(--muted); }
.sys-arrow { align-self: center; color: var(--blue); font-size: 26px; }

/* ---------- 关于 ---------- */
.about-home { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.about-home .sec-head { margin-bottom: 28px; }
.about-home p { margin-bottom: 16px; }
/* 关于：拼贴卡片 */
.bento { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.tile { position: relative; overflow: hidden; border-radius: 22px; padding: 28px; }
.tile h4 { font-size: 18px; line-height: 1.4; margin-bottom: 4px; }
.tile p { margin: 0 !important; font-size: 14px; }
.tile-brand {
  grid-column: span 2; display: flex; align-items: center; gap: 22px; padding: 32px; color: #fff;
  background: radial-gradient(360px 200px at 100% 0%, rgba(255, 255, 255, .25), transparent 70%), linear-gradient(135deg, #3b8cff, #1a5ad8);
  box-shadow: 0 24px 48px rgba(26, 90, 216, .3);
}
.tile-brand img { position: relative; z-index: 1; width: 76px; height: 76px; border-radius: 20px; box-shadow: 0 10px 24px rgba(5, 11, 24, .3); flex-shrink: 0; }
.tile-brand div { position: relative; z-index: 1; }
.tile-brand h4 { font-size: 20px; }
.tile-brand p { color: rgba(255, 255, 255, .8); }
.tile-brand .ecg { position: absolute; right: -10px; bottom: 6px; width: 60%; height: 70px; fill: none; stroke: rgba(255, 255, 255, .22); stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round; }
.tile-ic { width: 46px; height: 46px; border-radius: 14px; display: grid; place-items: center; margin-bottom: 40px; }
.tile-ic svg { width: 24px; height: 24px; fill: none; stroke: #fff; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.tile-dark { background: linear-gradient(160deg, var(--navy-700), var(--navy-900)); color: rgba(255, 255, 255, .6); }
.tile-dark h4 { color: #fff; }
.tile-dark .tile-ic { background: rgba(106, 166, 255, .18); }
.tile-dark .tile-ic svg { stroke: var(--blue-light); }
.tile-soft { background: #eef4ff; color: var(--muted); }
.tile-soft h4 { color: var(--ink); }
.tile-soft .tile-ic { background: var(--blue); }
.tile-metrics { grid-column: span 2; background: #fff; border: 1px solid var(--line); }
.tile-metrics h4 { color: var(--ink); margin-bottom: 16px; }
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip { display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px; border-radius: 999px; background: var(--bg-light); color: var(--ink); font-size: 14px; }
.chip i { width: 8px; height: 8px; border-radius: 50%; }
.dot-red { background: #ff4d63; } .dot-blue { background: var(--blue); } .dot-purple { background: #6a4cff; }
.dot-orange { background: #ff8a1f; } .dot-green { background: #20b97a; } .dot-cyan { background: #13a8cf; }
.values { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.value { padding: 44px 36px; border-radius: 20px; border: 1px solid var(--line-dark); background: rgba(255, 255, 255, .03); }
.value .en { font-size: 12px; letter-spacing: 3px; color: var(--blue-light); text-transform: uppercase; }
.value h3 { font-size: 22px; color: #fff; margin: 6px 0 18px; }
.value p { color: rgba(255, 255, 255, .7); }
.abilities { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.info-table { width: 100%; border-collapse: collapse; margin-top: 8px; font-size: 15px; }
.info-table th, .info-table td { text-align: left; padding: 14px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
.info-table th { width: 110px; color: var(--muted); font-weight: 400; }
.info-table td { color: var(--ink); }

/* ---------- 新闻 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.news-card { display: flex; flex-direction: column; border-radius: 20px; overflow: hidden; background: #fff; border: 1px solid var(--line); transition: transform .35s var(--ease), box-shadow .35s; }
.news-card:hover { transform: translateY(-6px); box-shadow: 0 24px 48px rgba(13, 29, 58, .1); }
.news-card.hide { display: none; }
.news-thumb { height: 190px; display: grid; place-items: center; }
.news-thumb svg { width: 64px; height: 64px; fill: none; stroke: #fff; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; opacity: .95; }
.news-card-body { flex: 1; display: flex; flex-direction: column; padding: 26px 28px 30px; }
.news-meta { display: flex; gap: 12px; align-items: center; font-size: 13px; color: var(--muted); margin-bottom: 10px; }
.news-meta .cat { color: var(--blue); background: #eef4ff; padding: 1px 10px; border-radius: 999px; }
.news-card h3 { font-size: 18px; line-height: 1.55; color: var(--ink); margin-bottom: 10px; transition: color .25s; }
.news-card:hover h3 { color: var(--blue); }
.news-card p { font-size: 14px; color: var(--muted); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }

.filter { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 44px; }
.filter button { padding: 9px 24px; border-radius: 999px; background: #fff; border: 1px solid var(--line); color: var(--text); cursor: pointer; font-size: 15px; transition: all .25s; }
.filter button:hover { border-color: var(--blue); color: var(--blue); }
.filter button.active { background: var(--blue); border-color: var(--blue); color: #fff; }

/* ---------- 新闻详情 ---------- */
.article-wrap { display: grid; grid-template-columns: 1fr 320px; gap: 64px; }
.article-head { padding-bottom: 28px; margin-bottom: 36px; border-bottom: 1px solid var(--line); }
.article-head h1 { font-size: clamp(26px, 3vw, 36px); line-height: 1.45; color: var(--ink); margin-bottom: 16px; }
.article-meta { display: flex; flex-wrap: wrap; gap: 24px; font-size: 14px; color: var(--muted); }
.article-body { font-size: 17px; line-height: 2; color: #33415a; }
.article-body p { margin-bottom: 22px; }
.article-body h2 { font-size: 22px; color: var(--ink); margin: 40px 0 16px; padding-left: 14px; border-left: 4px solid var(--blue); line-height: 1.4; }
.article-body ul { margin: 0 0 22px 1.2em; list-style: disc; }
.article-body li { margin-bottom: 8px; }
.article-tip { padding: 18px 22px; border-radius: 12px; background: #eef4ff; color: var(--blue-deep); font-size: 15px; }

/* ---------- 后台上传的图片 / 接口加载状态（assets/site.js） ---------- */
[hidden] { display: none !important; } /* 后台留空的可选文案（data-site-optional）要能真正隐藏 */
.news-thumb.has-img { overflow: hidden; background: var(--navy-700); }
.news-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s var(--ease); }
.news-card:hover .news-thumb img { transform: scale(1.05); }
.product-cover .product-img { max-width: 80%; object-fit: contain; }
.article-body .article-img img { display: block; max-width: 100%; height: auto; border-radius: 12px; margin: 0 auto; }
.site-empty { grid-column: 1 / -1; padding: 48px 0; text-align: center; color: var(--muted); font-size: 15px; }
.form-hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.article-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 50px; padding-top: 28px; border-top: 1px solid var(--line); font-size: 15px; }
.article-nav a:hover { color: var(--blue); }
.article-nav > :last-child { text-align: right; }
.article-nav span { color: var(--muted); }
.aside-box { position: sticky; top: 100px; padding: 30px 28px; border-radius: 20px; background: var(--bg-light); }
.aside-box h3 { font-size: 18px; color: var(--ink); padding-bottom: 14px; margin-bottom: 6px; border-bottom: 1px solid var(--line); }
.aside-box a:not(.link-more) { display: block; padding: 14px 0; border-bottom: 1px dashed var(--line); font-size: 15px; }
.aside-box a:not(.link-more):hover { color: var(--blue); }
.aside-box time { display: block; font-size: 12px; color: var(--muted); }
.aside-box .link-more { margin-top: 16px; }

/* ---------- 行动号召 ---------- */
.cta { position: relative; padding: 110px 0; color: #fff; text-align: center; overflow: hidden; background: radial-gradient(700px 320px at 50% 110%, rgba(47, 123, 255, .45), transparent 70%), var(--navy-950); }
.cta > .container { position: relative; }
.cta h2 { font-size: clamp(28px, 3.4vw, 44px); letter-spacing: 2px; margin-bottom: 14px; }
.cta p { color: rgba(255, 255, 255, .6); margin-bottom: 38px; }
.cta .hero-actions { justify-content: center; }

/* ---------- 内页横幅 ---------- */
.page-banner {
  position: relative; padding: calc(var(--header-h) + 100px) 0 90px; color: #fff; overflow: hidden;
  background: radial-gradient(700px 460px at 80% 30%, rgba(47, 123, 255, .4), transparent 70%), var(--navy-950);
}
.page-banner .container { position: relative; }
.crumbs { margin-bottom: 24px; font-size: 14px; color: rgba(255, 255, 255, .5); }
.crumbs a:hover { color: #fff; }
.crumbs span { margin: 0 10px; }
.page-banner h1 { font-size: clamp(34px, 4.4vw, 54px); letter-spacing: 4px; margin-bottom: 12px; }
.page-banner p { color: rgba(255, 255, 255, .6); max-width: 560px; }

/* ---------- 联系我们 ---------- */
.contact-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 80px; }
.contact-card { padding: 40px 36px; border-radius: 20px; background: #fff; border: 1px solid var(--line); }
.contact-card .metric-ic { margin-bottom: 22px; }
.contact-card h3 { font-size: 15px; color: var(--muted); font-weight: 400; margin-bottom: 4px; }
.contact-card p { font-size: 20px; color: var(--ink); font-weight: 600; word-break: break-all; }
.contact-card small { display: block; margin-top: 4px; color: var(--muted); font-size: 13px; }
.contact-main { display: grid; grid-template-columns: 1fr 1fr; border-radius: 24px; overflow: hidden; box-shadow: 0 30px 60px rgba(13, 29, 58, .1); }
.map-box { position: relative; min-height: 520px; overflow: hidden; background: radial-gradient(360px 300px at 50% 50%, rgba(47, 123, 255, .35), transparent 70%), var(--navy-900); }
.map-box::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px); background-size: 40px 40px; }
.map-pin { position: absolute; left: 50%; top: 46%; transform: translate(-50%, -100%); text-align: center; }
.map-pin i { display: block; width: 18px; height: 18px; margin: 0 auto; border-radius: 50%; background: var(--blue); animation: pulse 2s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(47, 123, 255, .6); } 70%, 100% { box-shadow: 0 0 0 26px rgba(47, 123, 255, 0); } }
.map-pin span { display: block; margin-top: 14px; padding: 8px 18px; border-radius: 999px; background: #fff; color: var(--ink); font-size: 14px; white-space: nowrap; }
.map-note { position: absolute; left: 28px; right: 28px; bottom: 24px; font-size: 13px; color: rgba(255, 255, 255, .45); }
.form-box { background: #fff; padding: 52px 48px; }
.form-box .sec-title { font-size: 28px; margin-bottom: 6px; }
.form-box > p { color: var(--muted); margin-bottom: 30px; }
.form { display: grid; gap: 18px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { display: grid; gap: 8px; font-size: 14px; color: var(--ink); }
.field i { color: #e5484d; font-style: normal; }
.field input, .field select, .field textarea {
  font: inherit; font-size: 15px; padding: 12px 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--bg-light);
  color: var(--ink); outline: none; transition: border-color .25s, background .25s, box-shadow .25s; resize: vertical;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--blue); background: #fff; box-shadow: 0 0 0 4px rgba(47, 123, 255, .12); }
.field .invalid { border-color: #e5484d; }
.form-tip { font-size: 14px; min-height: 1.5em; }
.form-tip.ok { color: #1f9d63; } .form-tip.err { color: #e5484d; }

/* ---------- 页脚 ---------- */
.footer { background: var(--navy-950); color: rgba(255, 255, 255, .55); font-size: 14px; }
.footer-top { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 48px; padding: 76px 0 56px; }
.footer-brand .logo { margin-bottom: 20px; }
.footer-brand p { max-width: 340px; }
.footer h4 { font-size: 16px; color: #fff; font-weight: 500; margin-bottom: 20px; }
.footer-col a, .footer-col span { display: block; padding: 5px 0; }
.footer-col span [data-site] { display: inline; padding: 0; }
.footer-col a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; padding: 22px 0 26px; border-top: 1px solid var(--line-dark); font-size: 13px; }
.footer-bottom a:hover { color: #fff; }
.footer-bottom .links { display: flex; gap: 22px; flex-wrap: wrap; }

.back-top {
  position: fixed; right: 28px; bottom: 28px; z-index: 90; width: 48px; height: 48px; border-radius: 50%; display: grid; place-items: center;
  background: var(--blue); color: #fff; font-size: 20px; box-shadow: 0 10px 24px rgba(47, 123, 255, .4);
  opacity: 0; pointer-events: none; transform: translateY(12px); transition: .3s;
}
.back-top.show { opacity: 1; pointer-events: auto; transform: none; }

/* ---------- 滚动渐显 ---------- */
.reveal { opacity: 0; transform: translateY(32px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.visible { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1100px) {
  .header-cta { display: none; }
  .scenes, .abilities { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 960px) {
  :root { --header-h: 68px; }
  .container { padding: 0 24px; }
  .menu-toggle { display: block; }
  .header { background: rgba(8, 20, 42, .96); }
  .nav {
    position: fixed; top: var(--header-h); left: 0; right: 0; flex-direction: column; gap: 0;
    background: var(--navy-900); padding: 8px 24px 24px; border-top: 1px solid var(--line-dark);
    transform: translateY(-110%); visibility: hidden; transition: transform .35s var(--ease), visibility .35s; z-index: -1;
  }
  .nav.open { transform: none; visibility: visible; }
  .nav a { padding: 16px 0; border-radius: 0; border-bottom: 1px solid var(--line-dark); }
  .nav a.active { background: none; color: var(--blue-light); }
  .hero { min-height: 0; padding-bottom: 80px; }
  .hero-inner, .about-home, .contact-main, .article-wrap { grid-template-columns: 1fr; gap: 56px; }
  .hero-visual { height: 460px; }
  .metrics, .products, .news-grid { grid-template-columns: repeat(2, 1fr); }
  .values { grid-template-columns: 1fr; }
  .system { grid-template-columns: 1fr; }
  .sys-arrow { transform: rotate(90deg); justify-self: center; }
  .section { padding: 84px 0; }
  .sec-head { flex-direction: column; align-items: flex-start; margin-bottom: 44px; }
  .contact-cards { grid-template-columns: 1fr; margin-bottom: 56px; }
  .map-box { min-height: 340px; }
  .aside-box { position: static; }
}
@media (max-width: 600px) {
  .container { padding: 0 16px; }
  .logo-text b { font-size: 18px; }
  .hero-desc { font-size: 16px; }
  .hero-visual { height: 400px; }
  .hero-visual::before { width: 300px; height: 300px; }
  .float-card { padding: 10px 14px; }
  .float-card b { font-size: 16px; }
  .metrics, .products, .news-grid, .scenes, .abilities, .form-row { grid-template-columns: 1fr; }
  .metric { padding: 32px 28px; }
  .form-box { padding: 40px 22px; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .page-banner { padding: calc(var(--header-h) + 60px) 0 60px; }
  .article-nav { grid-template-columns: 1fr; }
  .article-nav > :last-child { text-align: left; }
  .back-top { right: 16px; bottom: 16px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
  .ecg-line { stroke-dashoffset: 0; }
}