/* my.8fo.com — global B2B catalogue & RFQ site
   无外部依赖：不引外部字体/CDN，避免跨境加载延迟与隐私问题 */

:root {
  --ink: #0b1524;
  --body: #33445c;
  --muted: #6b7c93;
  --brand: #0d4a8f;
  --brand-2: #1668c4;
  --accent: #e8642a;
  --bg: #ffffff;
  --soft: #f5f8fc;
  --soft-2: #eef3fa;
  --line: #dfe6ef;
  --ok: #12805c;
  --radius: 10px;
  --wrap: 1160px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", Roboto, "Helvetica Neue",
          Arial, "Noto Sans", sans-serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--body);
  background: var(--bg);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { color: var(--ink); line-height: 1.25; margin: 0 0 .5em; font-weight: 700; letter-spacing: -0.01em; }
h1 { font-size: 2.35rem; }
h2 { font-size: 1.7rem; }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
a { color: var(--brand-2); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ---------- header ---------- */
.site-head {
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.94);
  backdrop-filter: saturate(180%) blur(8px);
  position: sticky; top: 0; z-index: 40;
}
.head-in {
  display: flex; align-items: center; gap: 18px;
  min-height: 68px; flex-wrap: wrap;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; color: var(--ink); font-size: 1.12rem; letter-spacing: -0.02em; }
.logo:hover { text-decoration: none; }
.logo-mark {
  width: 34px; height: 34px; border-radius: 8px; flex: none;
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-2) 100%);
  color: #fff; display: grid; place-items: center;
  font-size: .82rem; font-weight: 800; letter-spacing: .02em;
}
.logo-sub { display: block; font-size: .68rem; font-weight: 500; color: var(--muted); letter-spacing: 0; line-height: 1.2; }

.nav { display: flex; gap: 4px; margin-inline-start: auto; align-items: center; flex-wrap: wrap; }
.nav a {
  color: var(--body); padding: 8px 12px; border-radius: 7px;
  font-size: .93rem; font-weight: 500;
}
.nav a:hover { background: var(--soft-2); color: var(--brand); text-decoration: none; }
.nav a.on { color: var(--brand); font-weight: 600; }

.lang { display: flex; gap: 2px; align-items: center; border-inline-start: 1px solid var(--line); padding-inline-start: 12px; }
.lang a { font-size: .8rem; padding: 5px 7px; border-radius: 5px; color: var(--muted); }
.lang a:hover { background: var(--soft-2); text-decoration: none; }
.lang a.on { background: var(--brand); color: #fff; font-weight: 600; }

.btn {
  display: inline-block; padding: 11px 20px; border-radius: 8px;
  font-weight: 600; font-size: .95rem; border: 1px solid transparent;
  cursor: pointer; font-family: inherit; text-align: center;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: #0a3d78; }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: #cf531f; }
.btn-ghost { border-color: var(--line); color: var(--ink); background: #fff; }
.btn-ghost:hover { border-color: var(--brand); color: var(--brand); }
.btn-sm { padding: 8px 14px; font-size: .87rem; }
.btn-block { display: block; width: 100%; }

/* ---------- hero ---------- */
.hero {
  background:
    radial-gradient(900px 380px at 82% -12%, rgba(22,104,196,.13), transparent 62%),
    linear-gradient(180deg, var(--soft) 0%, #fff 100%);
  border-bottom: 1px solid var(--line);
  padding: 62px 0 54px;
}
.hero-grid { display: grid; grid-template-columns: 1.35fr 1fr; gap: 46px; align-items: center; }
.kicker {
  display: inline-block; font-size: .8rem; font-weight: 700; letter-spacing: .06em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 12px;
}
.hero h1 { font-size: 2.7rem; margin-bottom: 16px; }
.hero-lead { font-size: 1.07rem; color: var(--body); max-width: 40em; margin-bottom: 26px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.hero-panel {
  background: #fff; border: 1px solid var(--line); border-radius: 14px;
  padding: 22px; box-shadow: 0 10px 30px rgba(11,21,36,.06);
}
.hero-panel h2 { font-size: .95rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); font-weight: 700; margin-bottom: 14px; }
.fact { display: flex; justify-content: space-between; gap: 14px; padding: 11px 0; border-bottom: 1px dashed var(--line); font-size: .93rem; }
.fact:last-child { border-bottom: 0; }
.fact b { color: var(--ink); font-weight: 700; text-align: end; }

/* ---------- stats ---------- */
.stats { border-bottom: 1px solid var(--line); background: #fff; }
.stats-in { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding: 28px 0; }
.stat b { display: block; font-size: 1.6rem; color: var(--brand); font-weight: 800; letter-spacing: -0.02em; }
.stat span { font-size: .86rem; color: var(--muted); }

/* ---------- sections ---------- */
.sec { padding: 58px 0; }
.sec-alt { background: var(--soft); border-block: 1px solid var(--line); }
.sec-head { max-width: 46em; margin-bottom: 34px; }
.sec-head p { color: var(--muted); margin-bottom: 0; }
.sec-head-row { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; flex-wrap: wrap; margin-bottom: 34px; }

/* ---------- category tiles ---------- */
.cats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.cat {
  display: block; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 20px; color: inherit;
}
.cat:hover { border-color: var(--brand-2); text-decoration: none; box-shadow: 0 6px 18px rgba(11,21,36,.07); }
.cat h3 { margin-bottom: 4px; font-size: 1.02rem; }
.cat span { font-size: .85rem; color: var(--muted); }
.cat-n { float: inline-end; font-size: .78rem; color: var(--brand); background: var(--soft-2); border-radius: 20px; padding: 2px 9px; font-weight: 700; }

/* ---------- trust ---------- */
.trust { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.trust-i { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.trust-i h3 { font-size: 1.03rem; margin-bottom: 8px; }
.trust-i p { margin: 0; font-size: .93rem; color: var(--body); }
.trust-i .num {
  display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 7px;
  background: var(--soft-2); color: var(--brand); font-weight: 800; font-size: .8rem; margin-bottom: 12px;
}

/* ---------- product cards ---------- */
.grid-p { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  display: flex; flex-direction: column; overflow: hidden;
}
.card:hover { border-color: #c3d3e6; box-shadow: 0 8px 22px rgba(11,21,36,.07); }
.card-top { padding: 20px 20px 0; }
.card-tag {
  display: inline-block; font-size: .72rem; font-weight: 700; letter-spacing: .04em;
  text-transform: uppercase; color: var(--brand); background: var(--soft-2);
  border-radius: 5px; padding: 3px 8px; margin-bottom: 12px;
}
.card h3 { font-size: 1.06rem; margin-bottom: 8px; }
.card h3 a { color: var(--ink); }
.card h3 a:hover { color: var(--brand-2); text-decoration: none; }
.card-sum { font-size: .9rem; color: var(--body); margin-bottom: 16px; }
.card-foot {
  margin-top: auto; padding: 14px 20px; border-top: 1px solid var(--line);
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  background: #fcfdff;
}
.price { font-size: .95rem; color: var(--ink); font-weight: 700; }
.price small { display: block; font-size: .72rem; color: var(--muted); font-weight: 500; }
.sku { font-size: .72rem; color: var(--muted); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

/* ---------- filters ---------- */
.filters { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 28px; }
.filters a {
  padding: 7px 14px; border: 1px solid var(--line); border-radius: 20px;
  font-size: .88rem; color: var(--body); background: #fff;
}
.filters a:hover { border-color: var(--brand-2); text-decoration: none; }
.filters a.on { background: var(--brand); border-color: var(--brand); color: #fff; font-weight: 600; }

/* ---------- breadcrumb ---------- */
.crumb { font-size: .84rem; color: var(--muted); padding: 18px 0 0; }
.crumb a { color: var(--muted); }
.crumb span { margin: 0 7px; opacity: .5; }

/* ---------- product detail ---------- */
.pdp { display: grid; grid-template-columns: 1.6fr 1fr; gap: 42px; align-items: start; padding: 26px 0 0; }
.pdp h1 { font-size: 2.05rem; margin-bottom: 12px; }
.pdp h2 { font-size: 1.2rem; margin-top: 36px; }
.pdp-lead { font-size: 1.05rem; color: var(--body); }
.pdp-body { white-space: pre-wrap; }
.buy {
  position: sticky; top: 88px; background: #fff; border: 1px solid var(--line);
  border-radius: 12px; padding: 22px; box-shadow: 0 6px 20px rgba(11,21,36,.05);
}
.buy-price { font-size: 1.75rem; font-weight: 800; color: var(--ink); letter-spacing: -0.02em; }
.buy-price small { display: block; font-size: .8rem; color: var(--muted); font-weight: 500; letter-spacing: 0; }
.buy-meta { font-size: .87rem; color: var(--muted); margin: 14px 0 18px; padding-top: 14px; border-top: 1px dashed var(--line); }
.buy-meta div { display: flex; justify-content: space-between; padding: 3px 0; }
.buy-meta b { color: var(--ink); font-weight: 600; }
.buy-note { font-size: .8rem; color: var(--muted); margin: 14px 0 0; }
.spec { width: 100%; border-collapse: collapse; font-size: .9rem; margin: 6px 0 0; }
.spec th, .spec td { text-align: start; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.spec th { background: var(--soft); font-weight: 600; color: var(--ink); }
.points { list-style: none; padding: 0; margin: 0; }
.points li { padding: 9px 0 9px 28px; position: relative; border-bottom: 1px dashed var(--line); font-size: .93rem; }
.points li::before {
  content: ""; position: absolute; inset-inline-start: 4px; top: 17px;
  width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
}

/* ---------- rfq ---------- */
.rfq-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 40px; align-items: start; }
.rfq-list { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.rfq-row { padding: 16px 18px; border-bottom: 1px solid var(--line); display: flex; gap: 14px; align-items: flex-start; }
.rfq-row:last-child { border-bottom: 0; }
.rfq-row .nm { flex: 1; font-size: .93rem; }
.rfq-row .nm b { display: block; color: var(--ink); font-weight: 600; }
.rfq-row .nm span { font-size: .8rem; color: var(--muted); }
.rfq-row .qt { display: flex; align-items: center; gap: 6px; margin-top: 9px; }
.rfq-row input[type=number], .f-in {
  font-family: inherit; font-size: .9rem; padding: 9px 11px;
  border: 1px solid var(--line); border-radius: 7px; background: #fff; color: var(--ink);
  width: 100%; max-width: 100%;
}
.rfq-row input[type=number] { width: 84px; }
.rm { background: none; border: 0; color: var(--muted); cursor: pointer; font-size: .82rem; padding: 4px; font-family: inherit; }
.rm:hover { color: #c0392b; text-decoration: underline; }
.empty { padding: 26px 20px; color: var(--muted); font-size: .92rem; text-align: center; }

.form-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; }
.f-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 14px; }
.f-field { margin-bottom: 14px; }
.f-field label { display: block; font-size: .85rem; font-weight: 600; color: var(--ink); margin-bottom: 6px; }
.f-field label .req { color: var(--accent); }
.f-in:focus { outline: 2px solid rgba(22,104,196,.35); outline-offset: 1px; border-color: var(--brand-2); }
textarea.f-in { min-height: 108px; resize: vertical; }
.f-hint { font-size: .78rem; color: var(--muted); margin-top: 5px; }
.alert { border-radius: 8px; padding: 12px 15px; font-size: .89rem; margin-bottom: 16px; }
.alert-err { background: #fdf0ee; border: 1px solid #f3cfc8; color: #a3311c; }
.alert-ok { background: #edf8f3; border: 1px solid #c3e5d6; color: #0d6448; }
.alert h3 { margin: 0 0 6px; font-size: 1rem; color: inherit; }
.ref-box {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 1.2rem;
  font-weight: 700; color: var(--ink); background: #fff; border: 1px dashed var(--brand-2);
  border-radius: 8px; padding: 12px 16px; margin: 12px 0; display: inline-block; letter-spacing: .04em;
}
.next-steps { margin: 14px 0 18px; padding-inline-start: 20px; font-size: .91rem; }
.next-steps li { margin-bottom: 5px; }

/* ---------- faq ---------- */
.faq { display: grid; gap: 10px; }
.faq-i { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 2px 18px; }
.faq-i summary { cursor: pointer; padding: 13px 0; list-style: none; display: flex; align-items: flex-start; gap: 10px; }
.faq-i summary::-webkit-details-marker { display: none; }
.faq-i summary h3 { display: inline; font-size: 1rem; margin: 0; }
.faq-i summary::after { content: "+"; margin-inline-start: auto; color: var(--brand); font-weight: 700; font-size: 1.15rem; line-height: 1.2; }
.faq-i[open] summary::after { content: "\2212"; }
.faq-i p { margin: 0 0 15px; font-size: .93rem; color: var(--body); }

/* ---------- CTA band ---------- */
.band { background: linear-gradient(135deg, #0b3c74 0%, #1668c4 100%); color: #fff; padding: 52px 0; }
.band h2 { color: #fff; }
.band p { color: rgba(255,255,255,.86); margin-bottom: 24px; max-width: 42em; }
.band .btn-ghost { background: transparent; border-color: rgba(255,255,255,.5); color: #fff; }
.band .btn-ghost:hover { background: rgba(255,255,255,.12); }
.band .btn-accent { background: #fff; color: var(--brand); }
.band .btn-accent:hover { background: #eaf1fb; }

/* ---------- footer ---------- */
.site-foot { background: #0b1524; color: #93a4bb; padding: 46px 0 26px; font-size: .89rem; }
.foot-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 30px; margin-bottom: 30px; }
.site-foot h4 { color: #fff; font-size: .83rem; text-transform: uppercase; letter-spacing: .07em; margin-bottom: 12px; }
.site-foot a { color: #93a4bb; display: block; padding: 3px 0; }
.site-foot a:hover { color: #fff; }
.site-foot .logo { color: #fff; margin-bottom: 12px; }
.foot-legal { border-top: 1px solid #22314a; padding-top: 20px; font-size: .8rem; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* ---------- 404 ---------- */
.nf { text-align: center; padding: 96px 0; }
.nf h1 { font-size: 4rem; color: var(--line); margin-bottom: 6px; }

/* ---------- RTL ---------- */
[dir="rtl"] .cat-n { float: left; }
[dir="rtl"] .nav { margin-inline-start: auto; }

/* ---------- responsive ---------- */
@media (max-width: 1000px) {
  .hero-grid, .pdp, .rfq-grid { grid-template-columns: 1fr; gap: 30px; }
  .buy { position: static; }
  .grid-p, .cats { grid-template-columns: repeat(2, 1fr); }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 2.1rem; }
  .stats-in { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-p, .cats, .trust, .f-row { grid-template-columns: 1fr; }
  .hero { padding: 40px 0 34px; }
  .hero h1 { font-size: 1.75rem; }
  h1 { font-size: 1.65rem; }
  .head-in { min-height: 60px; gap: 8px; }
  .nav { width: 100%; margin-inline-start: 0; }
  .lang { border-inline-start: 0; padding-inline-start: 0; }
  .sec { padding: 40px 0; }
}

@media print {
  .site-head, .site-foot, .band, .buy .btn { display: none; }
}