/* site.css — 基础层。主题色由 theme.css 覆盖，勿在此写死品牌色 */
:root {
  --primary: #12332e;
  --accent: #d4552b;
  --ink: #1b1f1e;
  --muted: #6b7a76;
  --surface: #f6f5f2;
  --line: #e4e2dd;
  --bg: #fbfaf8;
  --radius: 10px;
  --wrap: 1120px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16.5px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }
h1, h2, h3, h4 { margin: 0 0 .5em; line-height: 1.2; letter-spacing: -.02em; font-weight: 650; }
p { margin: 0 0 1em; }
ul { margin: 0 0 1em; padding-left: 1.15em; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding-left: 20px; padding-right: 20px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 12px; top: 12px; z-index: 99; background: #fff; padding: 8px 12px; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: rgba(251, 250, 248, .92);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease;
}
.site-header.is-stuck { border-bottom-color: var(--line); }
.header-inner { display: flex; align-items: center; gap: 18px; min-height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--primary); letter-spacing: -.02em; }
.brand-logo { height: 30px; width: auto; }
.brand-name { font-size: 17px; white-space: nowrap; }
.nav { margin-left: auto; display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.nav a { padding: 8px 12px; border-radius: 8px; font-size: 14.5px; color: var(--ink); }
.nav a:hover { background: var(--surface); color: var(--primary); }
.nav a[aria-current="page"] { color: var(--primary); font-weight: 600; }
.lang-switch { display: flex; gap: 6px; font-size: 13px; color: var(--muted); }
.lang-switch a { padding: 4px 6px; }
.lang-switch a[aria-current="true"] { color: var(--primary); font-weight: 600; }
.lang-switch .ls-code { display: none; }
.nav-toggle {
  display: none; margin-left: auto; padding: 9px 13px; font: inherit; font-size: 14px;
  background: none; border: 1px solid var(--line); border-radius: 8px; cursor: pointer; color: var(--ink);
}

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; padding: 11px 20px; border-radius: 8px;
  font-size: 15px; font-weight: 600; line-height: 1; cursor: pointer;
  border: 1px solid transparent; transition: transform .15s ease, background .15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: color-mix(in srgb, var(--accent) 88%, #000); color: #fff; }
.btn-ghost { border-color: var(--line); color: var(--primary); background: #fff; }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.header-cta { white-space: nowrap; }

/* ---------- hero ---------- */
.hero { padding: 64px 0 56px; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.kicker { display: inline-block; font-size: 12.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); font-weight: 700; margin-bottom: 14px; }
.hero h1 { font-size: clamp(30px, 4.4vw, 48px); font-weight: 700; color: var(--primary); }
.lead { font-size: clamp(16.5px, 1.4vw, 18.5px); color: var(--muted); max-width: 56ch; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 26px; }
.hero-media { border-radius: var(--radius); overflow: hidden; background: var(--surface); aspect-ratio: 4/3; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; }

/* ---------- sections ---------- */
.section { padding: 72px 0; }
.section.tint { background: var(--surface); }
.section-head { max-width: 64ch; margin-bottom: 36px; }
.section-head h2 { font-size: clamp(23px, 2.4vw, 31px); color: var(--primary); }
.section-head p { color: var(--muted); margin: 0; }
.eyebrow { font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); font-weight: 700; margin-bottom: 10px; }
.section-foot { margin-top: 30px; }

/* ---------- product cards ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(248px, 1fr)); gap: 26px; }
.pcard { display: flex; flex-direction: column; background: #fff; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); transition: transform .18s ease, box-shadow .18s ease; }
.pcard:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(20, 30, 28, .08); }
.pcard-media { aspect-ratio: 1/1; background: var(--surface); overflow: hidden; }
.pcard-media img { width: 100%; height: 100%; object-fit: cover; }
.pcard-body { padding: 15px 16px 18px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.pcard-body h3 { font-size: 16px; margin: 0; }
.pcard-body p { margin: 0; font-size: 14px; color: var(--muted); }
.pcard-meta { margin-top: auto; padding-top: 10px; font-size: 12.5px; color: var(--muted); letter-spacing: .01em; }
.pcard-meta strong { color: var(--primary); font-weight: 600; }

.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 30px; }
.chip { padding: 8px 15px; border-radius: 999px; border: 1px solid var(--line); font-size: 14px; background: #fff; color: var(--ink); }
.chip[aria-pressed="true"] { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ---------- capability / process ---------- */
.caps { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 26px; }
.cap h3 { font-size: 16.5px; color: var(--primary); margin-bottom: 6px; }
.cap p { font-size: 14.5px; color: var(--muted); margin: 0; }
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 22px; counter-reset: step; }
.step { padding-top: 18px; border-top: 2px solid var(--primary); }
.step h3 { font-size: 15.5px; margin-bottom: 6px; }
.step h3::before { counter-increment: step; content: "0" counter(step) "  "; color: var(--accent); font-variant-numeric: tabular-nums; }
.step p { font-size: 14px; color: var(--muted); margin: 0; }

/* ---------- product detail ---------- */
.detail { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: start; padding-top: 40px; padding-bottom: 20px; }
[hidden] { display: none !important; }
.gallery-main { position: relative; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); background: var(--surface); aspect-ratio: 1/1; }
.gallery-main > img { width: 100%; height: 100%; object-fit: cover; }
.gallery-main > video { width: 100%; height: 100%; object-fit: contain; background: #0b0f0e; display: block; }
.gallery-embed { position: relative; width: 100%; height: 100%; }
.gallery-embed img { width: 100%; height: 100%; object-fit: cover; }
.gallery-embed iframe { width: 100%; height: 100%; border: 0; display: block; }
.gplay-lg { position: absolute; inset: 0; margin: auto; width: 62px; height: 62px; border-radius: 50%; border: 0; padding: 0; background: rgba(8,12,11,.62); color: #fff; display: flex; align-items: center; justify-content: center; cursor: pointer; }
.gplay-lg:hover { background: rgba(8,12,11,.82); }
.gallery-thumbs { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.gthumb { position: relative; padding: 0; border: 2px solid transparent; border-radius: 8px; background: none; cursor: pointer; line-height: 0; }
.gthumb.is-active { border-color: var(--primary); }
.gthumb img { width: 78px; height: 78px; object-fit: cover; border-radius: 6px; }
.gthumb .gplay { position: absolute; right: 5px; bottom: 5px; width: 20px; height: 20px; border-radius: 50%; background: rgba(8,12,11,.7); color: #fff; display: flex; align-items: center; justify-content: center; }
.gthumb:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.sku-line { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); margin: -2px 0 14px; letter-spacing: .02em; text-transform: uppercase; }
.sku-line code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; text-transform: none; letter-spacing: 0; background: var(--surface); border: 1px solid var(--line); padding: 3px 8px; border-radius: 5px; color: var(--ink); }
.detail-body { max-width: 760px; }
.detail h1 { font-size: clamp(25px, 3vw, 35px); color: var(--primary); }
.detail .summary { color: var(--muted); font-size: 16.5px; }

.specs { margin: 24px 0; border-top: 1px solid var(--line); }
.spec-row { display: grid; grid-template-columns: 132px 1fr; gap: 16px; padding: 11px 0; border-bottom: 1px solid var(--line); font-size: 14.5px; }
.spec-k { color: var(--muted); font-size: 12.5px; letter-spacing: .06em; text-transform: uppercase; padding-top: 2px; }
.spec-v { color: var(--ink); }
.badges { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 0; }
.badge { font-size: 12.5px; padding: 5px 11px; border-radius: 999px; background: var(--surface); color: var(--primary); border: 1px solid var(--line); }

.breadcrumb { font-size: 13px; color: var(--muted); padding-top: 22px; display: flex; gap: 8px; flex-wrap: wrap; }
.breadcrumb a:hover { color: var(--accent); }

/* ---------- prose ---------- */
.prose { max-width: 68ch; }
.prose h2 { font-size: 24px; margin-top: 1.6em; color: var(--primary); }
.prose h3 { font-size: 18px; margin-top: 1.4em; }
.prose li { margin-bottom: .35em; }

/* ---------- cta band ---------- */
.cta-band { background: var(--primary); color: #fff; padding: 56px 0; }
.cta-band h2 { color: #fff; font-size: clamp(22px, 2.5vw, 30px); }
.cta-band p { color: rgba(255,255,255,.78); max-width: 56ch; }
.cta-band .btn-primary { background: var(--accent); }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }

/* ---------- form ---------- */
.form { display: grid; gap: 16px; max-width: 640px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; letter-spacing: .02em; }
.field input, .field textarea, .field select {
  width: 100%; padding: 12px 13px; font: inherit; font-size: 15px; color: var(--ink);
  background: #fff; border: 1px solid var(--line); border-radius: 8px;
}
.field input:focus, .field textarea:focus { outline: 2px solid color-mix(in srgb, var(--accent) 55%, #fff); outline-offset: 1px; border-color: var(--accent); }
.field textarea { min-height: 122px; resize: vertical; }
.hp { position: absolute; left: -9999px; opacity: 0; height: 0; overflow: hidden; }
.form-note { font-size: 13px; color: var(--muted); }
.form-status { font-size: 14px; }
.form-status[data-state="ok"] { color: #1c7c54; }
.form-status[data-state="err"] { color: #b3261e; }

.contact-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 48px; align-items: start; }
.contact-list { list-style: none; padding: 0; margin: 0 0 24px; }
.contact-list li { padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
.contact-list span { display: block; font-size: 12.5px; color: var(--muted); letter-spacing: .06em; text-transform: uppercase; margin-bottom: 3px; }

/* ---------- footer ---------- */
.site-footer { background: #fff; border-top: 1px solid var(--line); padding: 48px 0 30px; font-size: 14px; color: var(--muted); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 36px; margin-bottom: 30px; }
.site-footer h4 { font-size: 13px; letter-spacing: .1em; text-transform: uppercase; color: var(--primary); margin-bottom: 12px; }
.site-footer a:hover { color: var(--accent); }
.footer-bottom { border-top: 1px solid var(--line); padding-top: 18px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 12.5px; }
.footer-note { font-size: 12px; color: var(--muted); }

/* ---------- mobile sticky cta ---------- */
.mobile-cta { display: none; }

/* ---------- responsive ---------- */
@media (min-width: 901px) {
  .detail > div:first-child { position: sticky; top: 88px; }
}
@media (max-width: 900px) {
  .hero-grid, .detail, .contact-grid { grid-template-columns: 1fr; gap: 30px; }
  .hero { padding: 40px 0 36px; }
  .section { padding: 48px 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .detail { padding-top: 24px; }
  .gallery-main { max-width: 520px; }
}
@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: #fff; border-bottom: 1px solid var(--line); padding: 10px 16px 16px;
  }
  .nav.is-open { display: flex; }
  .nav a { padding: 12px 10px; }
  .header-cta { display: none; }
  .header-inner { position: relative; gap: 10px; min-height: 60px; }
  .brand-name { font-size: 15.5px; }
  .nav-toggle { padding: 8px 11px; font-size: 13.5px; margin-left: auto; }
  .lang-switch { margin-left: 2px; gap: 0; font-size: 13px; }
  .lang-switch a { padding: 9px 7px; }
  .lang-switch .ls-full { display: none; }
  .lang-switch .ls-code { display: inline; }
  .form-row { grid-template-columns: 1fr; }
  .spec-row { grid-template-columns: 108px 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
  .mobile-cta {
    display: flex; position: fixed; left: 12px; right: 12px; bottom: 12px; z-index: 45;
    box-shadow: 0 8px 24px rgba(18, 51, 46, .22);
  }
  body.has-mobile-cta { padding-bottom: 76px; }
  .cta-inner { flex-direction: column; align-items: flex-start; }
}
@media print {
  .site-header, .site-footer, .mobile-cta, .filters { display: none; }
}

/* ---------- 首页横幅轮播 ---------- */
.hcarousel { position: relative; background: #0d1413; overflow: hidden; }
.hc-track { position: relative; height: clamp(380px, 44vw, 550px); }
.hc-slide { position: absolute; inset: 0; opacity: 0; transition: opacity .55s ease; pointer-events: none; }
.hc-slide.is-active { opacity: 1; pointer-events: auto; }
.hc-img { width: 100%; height: 100%; object-fit: cover; }
.hc-scrim { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(9,14,13,.84) 0%, rgba(9,14,13,.64) 44%, rgba(9,14,13,.16) 100%); }
.hc-body { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: center; padding-top: 20px; padding-bottom: 44px; color: #fff; }
.hc-kicker { color: #fff; opacity: .85; margin-bottom: 10px; }
.hc-title { font-size: clamp(27px, 4vw, 48px); font-weight: 700; line-height: 1.14; letter-spacing: -.02em; margin: 0 0 .38em; max-width: 16em; color: #fff; }
.hc-lead { font-size: clamp(15px, 1.3vw, 17.5px); line-height: 1.62; max-width: 33em; margin: 0 0 1.5em; color: rgba(255,255,255,.87); }
.hc-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hc-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.45); }
.hc-ghost:hover { background: rgba(255,255,255,.14); color: #fff; border-color: #fff; }
.hc-arrow { position: absolute; top: 50%; transform: translateY(-50%); z-index: 2; width: 42px; height: 42px; padding: 0; display: none; align-items: center; justify-content: center; border: 0; border-radius: 50%; background: rgba(255,255,255,.16); color: #fff; cursor: pointer; }
.is-multi .hc-arrow { display: inline-flex; }
.hc-arrow:hover { background: rgba(255,255,255,.32); }
.hc-prev { left: 18px; }
.hc-next { right: 18px; }
.hc-dots { position: absolute; left: 0; right: 0; bottom: 20px; z-index: 2; display: none; gap: 8px; justify-content: center; }
.is-multi .hc-dots { display: flex; }
.hc-dot { width: 26px; height: 4px; padding: 0; border: 0; border-radius: 2px; background: rgba(255,255,255,.4); cursor: pointer; }
.hc-dot.is-active { background: #fff; }
.hc-dot:focus-visible, .hc-arrow:focus-visible { outline: 2px solid #fff; outline-offset: 3px; }
@media (max-width: 820px) {
  .hc-track { height: 64vh; min-height: 430px; max-height: 560px; }
  .hc-scrim { background: linear-gradient(180deg, rgba(9,14,13,.5) 0%, rgba(9,14,13,.8) 62%, rgba(9,14,13,.88) 100%); }
  .hc-body { justify-content: flex-end; padding-bottom: 56px; }
  .hc-title { font-size: 28px; max-width: 100%; }
  .hc-lead { font-size: 15px; margin-bottom: 1.2em; }
  .hc-prev, .hc-next { display: none !important; }
  .hc-dots { justify-content: flex-start; padding-left: 20px; padding-right: 20px; }
}
@media (prefers-reduced-motion: reduce) {
  .hc-slide { transition: none; }
}

/* ---------- 买家类型 ---------- */
.bcards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; }
.bcard { display: flex; flex-direction: column; gap: 8px; padding: 22px 22px 18px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; transition: border-color .15s, transform .15s; }
.bcard:hover { border-color: var(--primary); transform: translateY(-2px); color: inherit; }
.bcard-kicker { font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); font-weight: 700; }
.bcard h3 { margin: 0; font-size: 18px; color: var(--primary); }
.bcard p { margin: 0; font-size: 14.5px; color: var(--muted); line-height: 1.55; }
.bcard-more { margin-top: auto; padding-top: 10px; font-size: 13.5px; font-weight: 600; color: var(--accent); }

/* ---------- 案例 ---------- */
.case-list { display: grid; gap: 18px; }
.case-card { display: grid; grid-template-columns: 220px 1fr; gap: 22px; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: #fff; }
.case-card:hover { border-color: var(--primary); color: inherit; }
.case-media { aspect-ratio: 4/3; background: var(--surface); }
.case-media img { width: 100%; height: 100%; object-fit: cover; }
.case-body { padding: 18px 22px 18px 0; display: flex; flex-direction: column; gap: 6px; }
.case-country { font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); font-weight: 700; }
.case-body h3 { margin: 0; font-size: 18px; color: var(--primary); }
.case-body p { margin: 0; color: var(--muted); font-size: 14.5px; }
.case-meta { margin-top: auto; padding-top: 8px; font-size: 13px; color: var(--muted); }
.case-facts { display: flex; flex-wrap: wrap; gap: 10px; margin: 4px 0 26px; }
.case-facts > div { display: flex; flex-direction: column; gap: 2px; padding: 10px 16px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); min-width: 118px; }
.case-facts span { font-size: 11.5px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.case-facts strong { font-size: 15px; color: var(--primary); }
@media (max-width: 700px) {
  .case-card { grid-template-columns: 1fr; }
  .case-body { padding: 0 18px 18px; }
  .case-media { aspect-ratio: 16/9; }
}