:root {
  --ink: #12161c;
  --ink-2: #2a3038;
  --muted: #6b7280;
  --line: #e5e8ec;
  --bg: #ffffff;
  --bg-soft: #f5f6f8;
  --accent: #ff5a1f;
  --accent-dark: #e04410;
  --radius: 10px;
  --wrap: 1200px;
  --shadow: 0 6px 24px rgba(18, 22, 28, .08);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 .5em; font-weight: 700; }
h1 { font-size: 40px; }
h2 { font-size: 30px; }
h3 { font-size: 19px; }
p { margin: 0 0 1em; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
.center { text-align: center; }
.center-left { margin-top: 24px; }
.muted { color: var(--muted); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px; border-radius: 4px; font-weight: 600; font-size: 15px;
  border: 1px solid transparent; cursor: pointer; transition: .18s; letter-spacing: .2px;
}
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-dark); }
.btn-outline { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn-outline:hover { background: var(--ink); color: #fff; }
.btn-ghost { border-color: rgba(255,255,255,.5); color: #fff; }
.btn-ghost:hover { background: #fff; color: var(--ink); }
.btn-sm { padding: 8px 16px; font-size: 14px; }
.btn-lg { padding: 15px 34px; font-size: 16px; }
.btn[disabled] { opacity: .6; cursor: default; }

/* ---------- header ---------- */
.site-header { position: sticky; top: 0; z-index: 60; background: #fff; box-shadow: 0 1px 0 var(--line); }
.topbar { background: var(--ink); color: #c9d0d8; font-size: 13px; }
.topbar-inner { display: flex; justify-content: space-between; align-items: center; height: 38px; gap: 16px; flex-wrap: wrap; }
.topbar-contact { display: flex; gap: 22px; flex-wrap: wrap; }
.topbar-contact span { display: inline-flex; align-items: center; gap: 6px; }
.topbar .ic { opacity: .8; }

.navbar { background: #fff; }
.navbar-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; letter-spacing: -.2px; }
.brand img { height: 34px; width: auto; }
.brand-text { white-space: nowrap; }

.nav { display: flex; align-items: center; gap: 4px; }
.nav > a, .nav-drop > a {
  padding: 10px 14px; font-weight: 600; font-size: 15px; border-radius: 4px;
  display: inline-flex; align-items: center; gap: 6px;
}
.nav > a:hover, .nav-drop > a:hover { color: var(--accent); }
.nav > a.active { color: var(--accent); }
.nav-cta { background: var(--accent); color: #fff !important; margin-left: 10px; }
.nav-cta:hover { background: var(--accent-dark); color: #fff !important; }

.nav-drop { position: relative; }
.drop-panel {
  position: fixed; left: 0; right: 0; top: 110px; background: #fff; border-top: 1px solid var(--line);
  box-shadow: 0 20px 40px rgba(0,0,0,.12); opacity: 0; visibility: hidden; transform: translateY(-8px);
  transition: .18s; padding: 26px 0; z-index: 50;
}
.nav-drop:hover .drop-panel { opacity: 1; visibility: visible; transform: none; }
.drop-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.drop-grid a { padding: 12px 14px; border-radius: 6px; display: block; }
.drop-grid a:hover { background: var(--bg-soft); }
.drop-grid strong { display: block; font-size: 14px; }
.drop-grid em { font-style: normal; font-size: 12px; color: var(--muted); }

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 10px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--ink); margin: 5px 0; transition: .2s; }

/* ---------- hero ---------- */
.hero { position: relative; background: var(--ink); }
.hero-slider { position: relative; height: 560px; overflow: hidden; }
.hero-slide {
  position: absolute; inset: 0; background-size: cover; background-position: center;
  display: flex; align-items: center; opacity: 0; transition: opacity .7s ease;
}
.hero-slide::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(0,0,0,.78) 0%, rgba(0,0,0,.35) 60%, rgba(0,0,0,.15) 100%); }
.hero-slide.is-active { opacity: 1; }
.hero-content { position: relative; z-index: 2; color: #fff; max-width: 720px; }
.hero-content h1 { font-size: 48px; text-shadow: 0 2px 20px rgba(0,0,0,.3); }
.hero-content p { font-size: 19px; color: #dfe4ea; margin-bottom: 26px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-dots { position: absolute; bottom: 22px; left: 0; right: 0; display: flex; justify-content: center; gap: 8px; z-index: 3; }
.hero-dots button { width: 10px; height: 10px; border-radius: 50%; border: 0; background: rgba(255,255,255,.45); cursor: pointer; padding: 0; }
.hero-dots button.on { background: var(--accent); width: 26px; border-radius: 5px; }

/* ---------- stats ---------- */
.stats { background: var(--bg-soft); border-bottom: 1px solid var(--line); }
.stats-inner { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { text-align: center; padding: 30px 12px; border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat strong { display: block; font-size: 28px; color: var(--accent); }
.stat span { font-size: 13px; color: var(--muted); letter-spacing: .5px; text-transform: uppercase; }

/* ---------- sections ---------- */
.section { padding: 72px 0; }
.section-tight { padding: 44px 0 72px; }
.section-alt { background: var(--bg-soft); }
.section-dark { background: var(--ink); color: #fff; }
.section-dark .kicker { color: var(--accent); }
.sec-head { text-align: center; max-width: 720px; margin: 0 auto 44px; }
.sec-head-left { text-align: left; margin-left: 0; }
.kicker { display: block; font-size: 13px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--accent); margin-bottom: 8px; }
.sec-head p { color: var(--muted); }

/* ---------- category cards ---------- */
.cat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.cat-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: .2s; }
.cat-card:hover { box-shadow: var(--shadow); transform: translateY(-3px); border-color: #d6dbe1; }
.cat-img { height: 160px; background: var(--bg-soft); overflow: hidden; }
.cat-img img { width: 100%; height: 100%; object-fit: cover; }
.cat-body { padding: 18px; }
.cat-body h3 { font-size: 16px; }
.cat-body p { font-size: 14px; color: var(--muted); min-height: 44px; }
.cat-more { font-size: 14px; font-weight: 600; color: var(--accent); }

/* ---------- product cards ---------- */
.prod-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.prod-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: .2s; display: flex; flex-direction: column; }
.prod-card:hover { box-shadow: var(--shadow); transform: translateY(-3px); }
.prod-img { height: 200px; background: var(--bg-soft); overflow: hidden; }
.prod-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s; }
.prod-card:hover .prod-img img { transform: scale(1.05); }
.prod-body { padding: 18px; display: flex; flex-direction: column; flex: 1; }
.prod-tag { font-size: 12px; color: var(--accent); font-weight: 700; letter-spacing: .5px; text-transform: uppercase; margin-bottom: 6px; }
.prod-body h3 { font-size: 16px; min-height: 40px; }
.prod-body p { font-size: 14px; color: var(--muted); flex: 1; min-height: 42px; }
.prod-link { font-size: 14px; font-weight: 600; color: var(--ink); }
.prod-card:hover .prod-link { color: var(--accent); }

/* ---------- capabilities ---------- */
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.cap-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; position: relative; }
.section-alt .cap-card { background: #fff; }
.cap-no { font-size: 34px; font-weight: 800; color: rgba(255,90,31,.18); line-height: 1; margin-bottom: 8px; }
.cap-card p { color: var(--muted); font-size: 15px; margin: 0; }

/* ---------- factory gallery (About 页) ---------- */
.factory-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.factory-gallery img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: var(--radius);
  display: block;
  background: #0e1116;
}

/* ---------- video grid (About 页) ---------- */
.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.video-card { margin: 0; }
.video-card video {
  width: 100%;
  aspect-ratio: 16 / 10;
  background: #0e1116;
  border-radius: var(--radius);
  display: block;
}
.video-card figcaption {
  text-align: center;
  margin-top: 10px;
  font-weight: 600;
  color: var(--ink);
  font-size: 15px;
}

/* ---------- applications ---------- */
.app-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: #232830; }
.app-card { background: var(--ink); padding: 30px 26px; border: 1px solid #232830; }
.app-card:hover { background: #171c23; }
.app-card h3 { color: #fff; font-size: 17px; }
.app-card p { color: #9aa4af; font-size: 14px; margin: 0; }

/* ---------- testimonials ---------- */
.quote-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.quote-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; position: relative; }
.quote-mark { font-size: 60px; color: var(--accent); line-height: .6; height: 30px; }
.quote-card > p { font-size: 15px; color: var(--ink-2); }
.quote-who { border-top: 1px solid var(--line); padding-top: 14px; }
.quote-who strong { display: block; font-size: 15px; }
.quote-who span { font-size: 13px; color: var(--muted); }

/* ---------- cta band ---------- */
.cta-band { background: var(--accent); color: #fff; padding: 46px 0; }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.cta-inner h2 { margin: 0 0 4px; font-size: 28px; }
.cta-inner p { margin: 0; opacity: .9; }
.cta-band .btn-accent { background: #fff; color: var(--ink); }
.cta-band .btn-accent:hover { background: var(--ink); color: #fff; }

/* ---------- page banner ---------- */
.page-banner { background: var(--ink); color: #fff; padding: 60px 0 56px; }
.page-banner h1 { margin-bottom: 6px; }
.page-banner p { color: #aab3bd; margin: 0; max-width: 720px; }

.breadcrumb { font-size: 13px; color: var(--muted); padding: 16px 20px; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .ic { font-size: 10px; opacity: .6; margin: 0 6px; }

/* ---------- filter bar ---------- */
.filter-bar { display: flex; justify-content: space-between; gap: 16px; align-items: center; flex-wrap: wrap; margin-bottom: 30px; }
.filter-chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip { padding: 7px 14px; border: 1px solid var(--line); border-radius: 20px; font-size: 14px; background: #fff; }
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip.on { background: var(--ink); border-color: var(--ink); color: #fff; }
.search-box { display: flex; border: 1px solid var(--line); border-radius: 4px; overflow: hidden; background: #fff; }
.search-box input { border: 0; padding: 9px 12px; width: 220px; outline: none; font-size: 14px; }
.search-box button { border: 0; background: var(--ink); color: #fff; padding: 0 14px; cursor: pointer; }
.search-box button:hover { background: var(--accent); }

.empty { text-align: center; padding: 60px 0; color: var(--muted); }
.empty-page { padding: 100px 0; }
.empty-page h1 { font-size: 80px; color: var(--accent); }
.empty-page p { color: var(--muted); margin-bottom: 24px; }

/* ---------- product detail ---------- */
.detail { display: grid; grid-template-columns: 1.05fr 1fr; gap: 44px; align-items: start; }
.gallery-main { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--bg-soft); }
.gallery-main img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.gallery-thumbs { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.gallery-thumbs button { width: 78px; height: 78px; border: 2px solid var(--line); border-radius: 6px; overflow: hidden; padding: 0; cursor: pointer; background: #fff; }
.gallery-thumbs button.on { border-color: var(--accent); }
.gallery-thumbs img { width: 100%; height: 100%; object-fit: cover; }
.detail-info h1 { font-size: 30px; }
.detail-summary { color: var(--muted); font-size: 16px; }
.detail-actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 22px 0 30px; }
.spec-block h3 { font-size: 17px; padding-bottom: 10px; border-bottom: 2px solid var(--ink); }
.spec-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.spec-table th, .spec-table td { padding: 11px 10px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.spec-table th { width: 190px; color: var(--ink-2); font-weight: 600; background: #fafbfc; }
.spec-table tr:nth-child(even) th { background: #f5f6f8; }
.detail-desc { margin-top: 56px; }
.detail-desc h3 { font-size: 20px; padding-bottom: 10px; border-bottom: 2px solid var(--ink); }
.detail-caps { margin-top: 48px; }
.detail-caps h3 { font-size: 20px; padding-bottom: 10px; border-bottom: 2px solid var(--ink); margin-bottom: 18px; }
.cap-list { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px 32px; }
.cap-list li { display: flex; justify-content: space-between; align-items: baseline; padding: 12px 0; border-bottom: 1px dashed #e2e2e2; }
.cap-list li span { color: #666; font-size: 14px; }
.cap-list li b { color: var(--ink); font-weight: 600; text-align: right; }
.cap-list-wide { grid-template-columns: repeat(3, 1fr); }
.cap-note { margin-top: 18px; color: #777; font-size: 14px; line-height: 1.6; }
@media (max-width: 640px) {
  .cap-list, .cap-list-wide { grid-template-columns: 1fr; }
}
.rich-text { color: var(--ink-2); font-size: 16px; }
.rich-text p { margin-bottom: 1em; }

/* ---------- about ---------- */
.about-layout { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: start; }
.about-media img { border-radius: var(--radius); width: 100%; }
.about-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); margin-top: 20px; border-radius: var(--radius); overflow: hidden; }
.about-stats > div { background: var(--bg-soft); padding: 20px; text-align: center; }
.about-stats strong { display: block; font-size: 22px; color: var(--accent); }
.about-stats span { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .5px; }

/* ---------- contact ---------- */
.contact-layout { display: grid; grid-template-columns: 1.35fr 1fr; gap: 44px; align-items: start; }
.form { background: var(--bg-soft); padding: 30px; border-radius: var(--radius); margin-top: 18px; }
.form-row { margin-bottom: 16px; }
.form-row.two { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-row label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.form-row label em { color: var(--accent); font-style: normal; }
.form-row input, .form-row textarea {
  width: 100%; padding: 11px 13px; border: 1px solid var(--line); border-radius: 5px;
  font-size: 15px; font-family: inherit; background: #fff; outline: none;
}
.form-row input:focus, .form-row textarea:focus { border-color: var(--accent); }
.form-msg { margin: 12px 0 0; font-size: 14px; }
.form-msg.ok { color: #15803d; }
.form-msg.err { color: #dc2626; }

.side-card { background: var(--bg-soft); border-radius: var(--radius); padding: 26px; margin-bottom: 22px; }
.side-card h3 { font-size: 17px; margin-bottom: 14px; }
.side-dark { background: var(--ink); color: #fff; }
.contact-list { list-style: none; margin: 0; padding: 0; font-size: 15px; }
.contact-list li { display: flex; gap: 10px; align-items: flex-start; padding: 7px 0; }
.contact-list a:hover { color: var(--accent); }
.steps { list-style: none; padding: 0; margin: 0; font-size: 15px; color: #c9d0d8; }
.steps li { display: flex; gap: 12px; align-items: center; padding: 9px 0; }
.steps span { width: 24px; height: 24px; border-radius: 50%; background: var(--accent); color: #fff; display: inline-flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 700; flex: none; }

/* ---------- footer ---------- */
.site-footer { background: var(--ink); color: #9aa4af; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.3fr; gap: 36px; padding: 56px 20px 40px; }
.f-col h4 { color: #fff; font-size: 16px; margin-bottom: 14px; }
.f-col ul { list-style: none; padding: 0; margin: 0; }
.f-col li { padding: 5px 0; }
.f-col a:hover { color: var(--accent); }
.brand-footer img { height: 36px; margin-bottom: 14px; }
.f-about p { color: #9aa4af; }
.social { display: flex; gap: 8px; margin-top: 14px; flex-wrap: wrap; }
.social a { border: 1px solid #333a43; padding: 5px 12px; border-radius: 20px; font-size: 12px; color: #c9d0d8; }
.social a:hover { border-color: var(--accent); color: var(--accent); }
.footer-bottom { border-top: 1px solid #232830; padding: 16px 0; font-size: 13px; }
.footer-bottom .wrap { display: flex; justify-content: space-between; }
.admin-link { opacity: .45; }
.admin-link:hover { opacity: 1; color: var(--accent); }

/* ---------- icons (css-only) ---------- */
.ic { width: 14px; height: 14px; display: inline-block; flex: none; position: relative; vertical-align: -2px; background: currentColor;
  -webkit-mask-repeat: no-repeat; mask-repeat: no-repeat; -webkit-mask-size: contain; mask-size: contain; }
.ic-mail { -webkit-mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='black'><path d='M2 6a2 2 0 0 1 2-2h16a2 2 0 0 1 2 2v12a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2V6zm2.2.5L12 12.7l7.8-6.2H4.2z'/></svg>"); mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='black'><path d='M2 6a2 2 0 0 1 2-2h16a2 2 0 0 1 2 2v12a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2V6zm2.2.5L12 12.7l7.8-6.2H4.2z'/></svg>"); }
.ic-phone { -webkit-mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='black'><path d='M6.6 10.8c1.2 2.4 3.2 4.4 5.6 5.6l2-2c.3-.3.7-.4 1-.2 1.1.4 2.3.6 3.5.6.6 0 1 .4 1 1V19c0 .6-.4 1-1 1C10.6 20 4 13.4 4 5c0-.6.4-1 1-1h3.2c.6 0 1 .4 1 1 0 1.2.2 2.4.6 3.5.1.4 0 .8-.2 1l-2 1.3z'/></svg>"); mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='black'><path d='M6.6 10.8c1.2 2.4 3.2 4.4 5.6 5.6l2-2c.3-.3.7-.4 1-.2 1.1.4 2.3.6 3.5.6.6 0 1 .4 1 1V19c0 .6-.4 1-1 1C10.6 20 4 13.4 4 5c0-.6.4-1 1-1h3.2c.6 0 1 .4 1 1 0 1.2.2 2.4.6 3.5.1.4 0 .8-.2 1l-2 1.3z'/></svg>"); }
.ic-pin { -webkit-mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='black'><path d='M12 2a7 7 0 0 1 7 7c0 5.2-7 13-7 13S5 14.2 5 9a7 7 0 0 1 7-7zm0 9.5A2.5 2.5 0 1 0 12 6.5a2.5 2.5 0 0 0 0 5z'/></svg>"); mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='black'><path d='M12 2a7 7 0 0 1 7 7c0 5.2-7 13-7 13S5 14.2 5 9a7 7 0 0 1 7-7zm0 9.5A2.5 2.5 0 1 0 12 6.5a2.5 2.5 0 0 0 0 5z'/></svg>"); }
.ic-wa { -webkit-mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='black'><path d='M12 2a10 10 0 0 0-8.6 15.1L2 22l5-1.3A10 10 0 1 0 12 2zm5.3 14.1c-.2.7-1.4 1.3-2 1.4-.5.1-1.2.1-1.9-.1-.4-.1-1-.3-1.8-.6-3.1-1.3-5.1-4.5-5.3-4.7-.1-.2-1.2-1.6-1.2-3.1 0-1.4.7-2.1 1-2.4.2-.3.5-.3.7-.3h.5c.2 0 .4 0 .6.5l.9 2.1c.1.2.1.4 0 .6l-.4.6c-.1.2-.3.3-.1.6.4.6.9 1.3 1.5 1.8.7.6 1.3.8 1.6.9.2.1.4.1.6-.1l.8-1c.2-.2.3-.2.6-.1l2 1c.3.1.5.2.5.4.1.2.1.8-.1 1.2z'/></svg>"); mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='black'><path d='M12 2a10 10 0 0 0-8.6 15.1L2 22l5-1.3A10 10 0 1 0 12 2zm5.3 14.1c-.2.7-1.4 1.3-2 1.4-.5.1-1.2.1-1.9-.1-.4-.1-1-.3-1.8-.6-3.1-1.3-5.1-4.5-5.3-4.7-.1-.2-1.2-1.6-1.2-3.1 0-1.4.7-2.1 1-2.4.2-.3.5-.3.7-.3h.5c.2 0 .4 0 .6.5l.9 2.1c.1.2.1.4 0 .6l-.4.6c-.1.2-.3.3-.1.6.4.6.9 1.3 1.5 1.8.7.6 1.3.8 1.6.9.2.1.4.1.6-.1l.8-1c.2-.2.3-.2.6-.1l2 1c.3.1.5.2.5.4.1.2.1.8-.1 1.2z'/></svg>"); }
.ic-chat { -webkit-mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='black'><path d='M4 4h16a2 2 0 0 1 2 2v9a2 2 0 0 1-2 2H9l-5 4V6a2 2 0 0 1 2-2z'/></svg>"); mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='black'><path d='M4 4h16a2 2 0 0 1 2 2v9a2 2 0 0 1-2 2H9l-5 4V6a2 2 0 0 1 2-2z'/></svg>"); }
.ic-clock { -webkit-mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='black'><path d='M12 2a10 10 0 1 0 0 20 10 10 0 0 0 0-20zm1 11h4v-2h-3V6h-2v7z'/></svg>"); mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='black'><path d='M12 2a10 10 0 1 0 0 20 10 10 0 0 0 0-20zm1 11h4v-2h-3V6h-2v7z'/></svg>"); }
.ic-search { -webkit-mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'><path d='M10 2a8 8 0 1 0 4.9 14.3l4.4 4.4 1.4-1.4-4.4-4.4A8 8 0 0 0 10 2zm0 2a6 6 0 1 1 0 12 6 6 0 0 1 0-12z'/></svg>"); mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'><path d='M10 2a8 8 0 1 0 4.9 14.3l4.4 4.4 1.4-1.4-4.4-4.4A8 8 0 0 0 10 2zm0 2a6 6 0 1 1 0 12 6 6 0 0 1 0-12z'/></svg>"); width: 16px; height: 16px; }
.ic-arrow { -webkit-mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='black'><path d='M8.6 5.6 7.2 7l5 5-5 5 1.4 1.4L15 12z'/></svg>"); mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='black'><path d='M8.6 5.6 7.2 7l5 5-5 5 1.4 1.4L15 12z'/></svg>"); width: 11px; height: 11px; }
.ic-caret { -webkit-mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='black'><path d='M7 10l5 5 5-5z'/></svg>"); mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='black'><path d='M7 10l5 5 5-5z'/></svg>"); width: 11px; height: 11px; }

/* ---------- responsive ---------- */
@media (max-width: 1000px) {
  .cat-grid, .prod-grid { grid-template-columns: repeat(3, 1fr); }
  .cap-grid, .app-grid, .quote-grid { grid-template-columns: repeat(2, 1fr); }
  .factory-gallery, .video-grid { grid-template-columns: repeat(2, 1fr); }
  .drop-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .detail, .about-layout, .contact-layout { grid-template-columns: 1fr; gap: 30px; }
  .hero-content h1 { font-size: 36px; }
}
@media (max-width: 720px) {
  h1 { font-size: 28px; } h2 { font-size: 24px; }
  .topbar-inner { height: auto; padding: 6px 0; font-size: 12px; }
  .navbar-inner { height: 62px; }
  .nav-toggle { display: block; }
  .nav {
    position: fixed; top: 62px; left: 0; right: 0; background: #fff; flex-direction: column;
    align-items: stretch; padding: 10px 20px 20px; gap: 0; box-shadow: 0 20px 30px rgba(0,0,0,.12);
    display: none;
  }
  body.nav-open .nav { display: flex; }
  .nav > a, .nav-drop > a { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .nav-cta { margin: 12px 0 0; justify-content: center; }
  .drop-panel { display: none; }
  .cat-grid, .prod-grid { grid-template-columns: repeat(2, 1fr); }
  .cap-grid, .app-grid, .quote-grid { grid-template-columns: 1fr; }
  .factory-gallery, .video-grid { grid-template-columns: 1fr; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .stat { border-bottom: 1px solid var(--line); }
  .hero-slider { height: 420px; }
  .hero-content h1 { font-size: 28px; }
  .hero-content p { font-size: 16px; }
  .section { padding: 48px 0; }
  .form-row.two { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .search-box input { width: 150px; }
  .spec-table th { width: 130px; }
}

/* ---------- narrow content pages ---------- */
.narrow { max-width: 880px; }

/* ---------- FAQ accordion ---------- */
.faq-block { margin-top: 6px; }
.faq-list { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: #fff; }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item:last-child { border-bottom: 0; }
.faq-item > summary {
  list-style: none; cursor: pointer; padding: 18px 22px; font-weight: 600; font-size: 16px;
  display: flex; align-items: center; justify-content: space-between; gap: 14px; user-select: none;
}
.faq-item > summary::-webkit-details-marker { display: none; }
.faq-item > summary:hover { color: var(--accent); }
.faq-ic { width: 16px; height: 16px; flex: none; position: relative; }
.faq-ic::before, .faq-ic::after { content: ""; position: absolute; background: var(--accent); border-radius: 2px; }
.faq-ic::before { left: 0; right: 0; top: 7px; height: 2px; }
.faq-ic::after { top: 0; bottom: 0; left: 7px; width: 2px; transition: opacity .2s; }
.faq-item[open] > summary .faq-ic::after { opacity: 0; }
.faq-answer { padding: 0 22px 20px; color: var(--ink-2); }
.faq-answer p { margin: 0 0 .6em; }

/* ---------- shipping cards ---------- */
.ship-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.ship-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; }
.section-alt .ship-card { background: #fff; }
.ship-card h3 { font-size: 17px; margin-bottom: 10px; }
.ship-card p { color: var(--muted); font-size: 15px; }
.tick { list-style: none; margin: 14px 0 0; padding: 0; }
.tick li { position: relative; padding-left: 26px; margin: 8px 0; font-size: 14.5px; color: var(--ink-2); }
.tick li::before {
  content: ""; position: absolute; left: 0; top: 6px; width: 16px; height: 16px; background: var(--accent);
  -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='black'><path d='M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z'/></svg>") center/contain no-repeat;
  mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='black'><path d='M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z'/></svg>") center/contain no-repeat;
}
.tick li b { color: var(--ink); }

.table-card { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: #fff; }
.note-box { margin-top: 26px; padding: 18px 22px; background: #fff7f2; border: 1px solid #ffd9c4; border-radius: var(--radius); font-size: 15px; color: var(--ink-2); }
.note-box strong { color: var(--accent-dark); }

/* ---------- thickness guide ---------- */
.guide-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.guide-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.section-alt .guide-card { background: #fff; }
.guide-card h3 { font-size: 17px; margin-bottom: 8px; }
.guide-card p { color: var(--muted); font-size: 15px; margin: 0; }
.guide-card p b { color: var(--ink); }
.guide-table td:first-child b { color: var(--ink); }
.tag { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: 13px; font-weight: 600; white-space: nowrap; }
.tag-drone { background: #e8f0ff; color: #1d4ed8; }
.tag-rc { background: #e9f9ee; color: #15803d; }
.tag-robot { background: #f3ecff; color: #6d28d9; }
.tag-industrial { background: #fff1e6; color: #c2410c; }

@media (max-width: 1000px) {
  .ship-grid, .guide-cards { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .ship-grid, .guide-cards { grid-template-columns: 1fr; }
  .narrow { padding: 0 4px; }
}