:root {
  --navy: #0b3d5c; --blue: #1170a8; --sky: #2ea3d6;
  --ink: #1a2733; --mut: #5a7085; --line: #dce6ee; --bg: #f5f8fa;
  --wa: #25d366; --gold: #c9a24b;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: "Segoe UI", "Microsoft YaHei", Arial, sans-serif; color: var(--ink); background: #fff; }
a { text-decoration: none; color: inherit; }
img { display: block; }

.hd { position: sticky; top: 0; z-index: 50; display: flex; align-items: center; gap: 22px;
  padding: 10px 4vw; background: #fff; border-bottom: 1px solid var(--line); }
.logo { font-weight: 800; font-size: 20px; color: var(--navy); letter-spacing: 1px; }
.logo span { color: var(--sky); font-weight: 400; }
.nav { display: flex; gap: 16px; font-size: 14px; }
.nav > a, .nav > .dd { color: var(--mut); padding: 8px 2px; cursor: pointer; }
.nav > a:hover, .nav > .dd:hover { color: var(--blue); }
.dd { position: relative; }
.dd-menu { display: none; position: absolute; top: 100%; left: -14px; background: #fff; border: 1px solid var(--line);
  border-radius: 10px; box-shadow: 0 10px 26px rgba(11,61,92,.14); padding: 8px; min-width: 230px; }
.dd:hover .dd-menu { display: block; }
.dd-menu a { display: flex; justify-content: space-between; gap: 14px; padding: 8px 10px; border-radius: 7px; font-size: 13.5px; color: var(--ink); }
.dd-menu a:hover { background: var(--bg); color: var(--blue); }
.dd-menu a span { color: var(--mut); font-size: 12px; }
.hd-right { margin-left: auto; display: flex; align-items: center; gap: 12px; }
#q { width: 210px; padding: 8px 12px; border: 1px solid var(--line); border-radius: 20px; font-size: 14px; outline: none; }
#q:focus { border-color: var(--sky); }
.wa-btn { background: var(--wa); color: #fff; padding: 8px 16px; border-radius: 20px; font-size: 14px; font-weight: 600; }

.wrap { max-width: 1240px; margin: 0 auto; padding: 24px 4vw; }

/* hero */
.hero { position: relative; color: #fff; border-radius: 16px; overflow: hidden; margin-top: 24px;
  background: linear-gradient(120deg, rgba(11,61,92,.94) 20%, rgba(17,112,168,.82) 60%, rgba(46,163,214,.55)), var(--hero-img, none); background-size: cover; }
.hero-in { padding: 76px 54px; max-width: 680px; }
.hero .kicker { letter-spacing: 3px; font-size: 12px; opacity: .85; margin-bottom: 14px; text-transform: uppercase; }
.hero h1 { font-size: 42px; line-height: 1.15; margin-bottom: 16px; }
.hero p { font-size: 16.5px; opacity: .93; line-height: 1.65; margin-bottom: 26px; }
.btn { display: inline-block; padding: 12px 26px; border-radius: 24px; font-weight: 600; font-size: 15px; cursor: pointer; }
.btn.light { background: #fff; color: var(--navy); }
.btn.wa { background: var(--wa); color: #fff; }
.btn.ghost2 { border: 1.5px solid var(--blue); color: var(--blue); }
.stats { display: flex; gap: 38px; margin-top: 32px; flex-wrap: wrap; }
.stats b { font-size: 26px; display: block; }
.stats span { font-size: 13px; opacity: .85; }

/* collections */
h2.sec { font-size: 26px; color: var(--navy); margin: 44px 0 6px; }
p.sec-sub { color: var(--mut); margin-bottom: 20px; }
.col-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 18px; }
.col-card { position: relative; border-radius: 14px; overflow: hidden; min-height: 240px; display: flex; align-items: flex-end; }
.col-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.col-card .ov { position: relative; width: 100%; padding: 20px; color: #fff;
  background: linear-gradient(180deg, transparent, rgba(11,61,92,.92) 62%); }
.col-card .ov b { font-size: 20px; display: block; margin-bottom: 4px; }
.col-card .ov span { font-size: 13px; opacity: .9; }
.col-card:hover img { transform: scale(1.03); }
.col-card img { transition: .3s; }

/* story */
.story { display: grid; grid-template-columns: minmax(280px, 460px) 1fr; gap: 40px; align-items: center;
  margin: 46px 0; }
.story img { width: 100%; border-radius: 14px; }
.story h3 { font-size: 22px; color: var(--navy); margin-bottom: 12px; }
.story p { line-height: 1.8; color: #33475b; font-size: 15px; }
.story .more { display: inline-block; margin-top: 14px; color: var(--blue); font-weight: 600; }

/* pdf downloads */
.pdfs { background: var(--bg); border-radius: 14px; padding: 26px 28px; margin: 44px 0; }
.pdfs h3 { color: var(--navy); font-size: 20px; margin-bottom: 6px; }
.pdfs p { color: var(--mut); font-size: 13.5px; margin-bottom: 14px; }
.pdfs .row { display: flex; flex-wrap: wrap; gap: 10px; }
.pdfs a { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 10px 16px; font-size: 13.5px; color: var(--navy); font-weight: 600; }
.pdfs a:hover { border-color: var(--sky); color: var(--blue); }

/* feature trio (OEM / factory / service) */
.trio { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; margin: 40px 0; }
.trio .t { background: var(--bg); border-radius: 14px; padding: 26px; }
.trio .t h4 { color: var(--navy); font-size: 17px; margin-bottom: 10px; }
.trio .t p { font-size: 14px; line-height: 1.7; color: #33475b; }

/* filter bar */
.bar { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 6px; align-items: center; }
.bar .lbl { font-size: 12px; color: var(--mut); font-weight: 700; text-transform: uppercase; letter-spacing: 1px; width: 100%; margin-top: 6px; }
.chip { padding: 7px 14px; border-radius: 16px; background: var(--bg); color: var(--mut); font-size: 13px; cursor: pointer; border: 1px solid transparent; }
.chip.on { background: var(--blue); color: #fff; }
.count { color: var(--mut); font-size: 13.5px; margin: 12px 0 16px; }

/* product grid */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 18px; }
.card { border: 1px solid var(--line); border-radius: 12px; overflow: hidden; cursor: pointer; transition: .15s; background: #fff; display: flex; flex-direction: column; }
.card:hover { box-shadow: 0 6px 20px rgba(11,61,92,.13); }
.card .ph { position: relative; background: #f2f6f9; }
.card .ph img { width: 100%; height: 210px; object-fit: cover; }
.card .bd { padding: 13px 15px 15px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.card .bd b { font-size: 14.5px; line-height: 1.45; color: var(--navy); }
.card .bd .meta { font-size: 12px; color: var(--mut); line-height: 1.7; }
.card .bd .meta i { font-style: normal; color: #8aa0b2; }
.card .bd .sku { margin-top: auto; align-self: flex-start; font-size: 12px; font-weight: 700; color: var(--blue); background: #eaf4fb; padding: 2px 8px; border-radius: 8px; }
.card .bd .custom { font-size: 11.5px; color: var(--gold); font-weight: 600; }

/* detail */
.detail { display: grid; grid-template-columns: minmax(300px, 470px) 1fr; gap: 42px; margin-top: 26px; }
.d-imgs img { width: 100%; border-radius: 12px; border: 1px solid var(--line); margin-bottom: 12px; }
.detail h1 { font-size: 25px; color: var(--navy); line-height: 1.35; margin-bottom: 6px; }
.detail .cn { color: var(--mut); font-size: 14px; margin-bottom: 14px; }
.kv { width: 100%; border-collapse: collapse; margin: 14px 0 22px; }
.kv td { border-bottom: 1px solid var(--line); padding: 10px 4px; font-size: 14.5px; }
.kv td:first-child { color: var(--blue); font-weight: 600; width: 150px; }
.ask { background: var(--wa); color: #fff; display: inline-block; padding: 13px 30px; border-radius: 26px; font-weight: 700; font-size: 16px; }
.hint { font-size: 12.5px; color: var(--mut); margin-top: 10px; }
.crumb { margin-top: 20px; font-size: 13.5px; color: var(--mut); }
.crumb a { color: var(--blue); }

/* about */
.about { max-width: 780px; }
.about p { line-height: 1.85; color: #33475b; margin: 12px 0; font-size: 15px; }
.about h2 { color: var(--navy); margin: 26px 0 8px; font-size: 20px; }

/* cta band */
.cta-band { background: linear-gradient(120deg, var(--navy), var(--blue)); color: #fff; text-align: center; padding: 52px 5vw; margin-top: 60px; }
.cta-band h2 { font-size: 24px; font-weight: 600; margin-bottom: 22px; }
.cta-band .row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.ft { background: #062a40; color: #cfe0ec; }
.ft-in { max-width: 1240px; margin: 0 auto; padding: 40px 4vw; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 28px; font-size: 13.5px; }
.ft b { color: #fff; display: block; margin-bottom: 8px; }
.ft p { line-height: 1.7; }
.ft-copy { text-align: center; padding: 14px; border-top: 1px solid rgba(255,255,255,.12); font-size: 12px; opacity: .7; }

.wa-float { position: fixed; right: 22px; bottom: 22px; width: 56px; height: 56px; border-radius: 50%;
  background: var(--wa); display: flex; align-items: center; justify-content: center; box-shadow: 0 6px 18px rgba(0,0,0,.25); z-index: 60; cursor: pointer; }
.wa-float svg { width: 30px; height: 30px; fill: #fff; }

/* decoration chips */
.decor-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; }
.decor-grid .dc { background: var(--bg); border-radius: 10px; padding: 16px 18px; }
.decor-grid .dc b { display: block; color: var(--navy); font-size: 14.5px; margin-bottom: 4px; }
.decor-grid .dc span { font-size: 12.5px; color: var(--mut); }

/* process steps */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 12px; counter-reset: st; }
.steps .st { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 18px 16px; position: relative; }
.steps .st b { display: inline-flex; width: 30px; height: 30px; align-items: center; justify-content: center;
  background: var(--blue); color: #fff; border-radius: 50%; font-size: 14px; margin-bottom: 10px; }
.steps .st span { font-size: 12.5px; line-height: 1.6; color: #33475b; display: block; }

/* faq */
.faq { max-width: 900px; }
.faq details { border-bottom: 1px solid var(--line); padding: 14px 4px; }
.faq details b { color: var(--navy); font-size: 15px; cursor: pointer; display: block; }
.faq details[open] b { color: var(--blue); }
.faq details p { margin-top: 8px; font-size: 14px; line-height: 1.75; color: #33475b; }
.faq details { cursor: pointer; }

.empty { text-align: center; color: var(--mut); padding: 60px 0; }

@media (max-width: 800px) {
  .nav { display: none; }
  #q { width: 130px; }
  .hero-in { padding: 46px 26px; }
  .hero h1 { font-size: 30px; }
  .detail, .story { grid-template-columns: 1fr; gap: 18px; }
  .stats { gap: 22px; }
}

/* ---- 询盘表单页 ---- */
.narrow { max-width: 860px; }
.inq { margin: 20px 0 10px; display: grid; gap: 14px; }
.frow2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.inq label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; font-weight: 600; color: var(--ink); }
.inq input, .inq textarea { border: 1px solid var(--line); border-radius: 8px; padding: 11px 12px; font: inherit; font-weight: 400; background: #fff; }
.inq input:focus, .inq textarea:focus { outline: 2px solid var(--sky); border-color: var(--sky); }
.inq textarea { min-height: 110px; resize: vertical; }
.inq .fsend { background: var(--wa); color: #fff; border: none; justify-self: start; }
@media (max-width: 640px) { .frow2 { grid-template-columns: 1fr; } }