/* ==========================================================================
   SIKEO — B2B export site
   Pure static CSS. No external fonts, no CDN, no JS.
   Palette: ink #0f1e28 / amber #ffc52d / red #c5002e
   ========================================================================== */

:root {
  --ink: #0f1e28;
  --ink-2: #172b38;
  --ink-3: #24404f;
  --amber: #ffc52d;
  --red: #c5002e;
  --paper: #ffffff;
  --mist: #f4f6f7;
  --mist-2: #e9edef;
  --line: #dfe4e7;
  --text: #17242c;
  --text-2: #5a6b76;
  --text-3: #8b9aa3;
  --radius: 2px;
  --shadow-sm: 0 1px 2px rgba(15, 30, 40, .06), 0 2px 8px rgba(15, 30, 40, .04);
  --shadow-lg: 0 18px 50px -18px rgba(15, 30, 40, .28);
  --maxw: 1180px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
               "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--paper);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 32px; }

/* ---------- type ---------- */

.eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--text-3);
}

.eyebrow--amber { color: var(--amber); }

h1, h2, h3 { font-weight: 700; letter-spacing: -.022em; line-height: 1.12; }

.h-display { font-size: clamp(34px, 3.9vw, 54px); letter-spacing: -.032em; line-height: 1.08; }
.h-section { font-size: clamp(28px, 3.2vw, 42px); letter-spacing: -.028em; }

.lede { font-size: 18px; line-height: 1.62; color: var(--text-2); }
.muted { color: var(--text-2); }
.small { font-size: 13px; }

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  font-size: 14px;
  font-weight: 650;
  letter-spacing: .02em;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: transform .18s ease, background .18s ease, color .18s ease, border-color .18s ease;
  cursor: pointer;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }

.btn--primary { background: var(--ink); color: #fff; }
.btn--primary:hover { background: var(--ink-3); }

.btn--amber { background: var(--amber); color: var(--ink); }
.btn--amber:hover { background: #ffd45c; }

.btn--ghost { border-color: rgba(255, 255, 255, .28); color: #fff; }
.btn--ghost:hover { border-color: #fff; background: rgba(255, 255, 255, .08); }

.btn--line { border-color: var(--line); color: var(--ink); background: #fff; }
.btn--line:hover { border-color: var(--ink); }

.arrow::after { content: "\2192"; font-weight: 400; }

/* ---------- topbar + nav ---------- */

.topbar {
  background: var(--ink);
  color: rgba(255, 255, 255, .72);
  font-size: 12.5px;
  letter-spacing: .01em;
}
.topbar .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  height: 38px;
}
.topbar strong { color: var(--amber); font-weight: 650; }

.nav {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(255, 255, 255, .93);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 32px;
}

.brand { display: flex; align-items: center; gap: 0; }
.brand__logo { height: 30px; width: auto; display: block; }
.brand__div {
  width: 1px;
  height: 20px;
  background: var(--line);
  margin: 0 13px;
  flex: 0 0 auto;
}
.brand__sub {
  font-size: 9px;
  line-height: 1.3;
  letter-spacing: .16em;
  color: var(--text-3);
  text-transform: uppercase;
  max-width: 84px;
}

.nav__links { display: flex; align-items: center; gap: 30px; font-size: 14px; font-weight: 550; }
.nav__links a { color: var(--text-2); padding: 6px 0; border-bottom: 2px solid transparent; transition: color .15s, border-color .15s; }
.nav__links a:hover { color: var(--ink); border-bottom-color: var(--amber); }

.nav__cta { display: flex; align-items: center; gap: 14px; }
.nav__tel { font-size: 13px; color: var(--text-2); }

/* ---------- hero ---------- */

.hero {
  background: var(--ink);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: -20%; right: -10%;
  width: 620px; height: 620px;
  background: radial-gradient(circle, rgba(255, 197, 45, .13), transparent 62%);
  pointer-events: none;
}
.hero .wrap {
  position: relative;
  display: grid;
  grid-template-columns: 1.02fr .98fr;
  gap: 64px;
  align-items: center;
  padding-top: 88px;
  padding-bottom: 96px;
}

.hero h1 { color: #fff; margin: 20px 0 22px; }
.hero h1 em { font-style: normal; color: var(--amber); }
.hero .lede { color: rgba(255, 255, 255, .70); max-width: 34em; }

.hero__actions { display: flex; gap: 14px; margin-top: 34px; flex-wrap: wrap; }

.hero__note {
  margin-top: 26px;
  font-size: 12.5px;
  color: rgba(255, 255, 255, .42);
  display: flex;
  align-items: center;
  gap: 10px;
}
.hero__note .dot { width: 5px; height: 5px; border-radius: 50%; background: var(--amber); flex: 0 0 auto; }

.hero__media { position: relative; }
.hero__frame {
  position: relative;
  aspect-ratio: 1 / 1.02;
  border-radius: 2px;
  overflow: hidden;
  background: #0a1620;
  box-shadow: 0 40px 90px -40px rgba(0, 0, 0, .85);
}
.hero__frame img { width: 100%; height: 100%; object-fit: cover; object-position: 58% 48%; }
.hero__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15, 30, 40, 0) 42%, rgba(15, 30, 40, .45) 100%);
  pointer-events: none;
}

.hero__tag {
  position: absolute;
  top: 18px; left: 18px;
  background: var(--amber);
  color: var(--ink);
  font-size: 10.5px;
  font-weight: 800;
  letter-spacing: .14em;
  padding: 6px 10px;
  border-radius: 1px;
}

.hero__stat {
  position: absolute;
  left: -46px;
  bottom: 34px;
  background: #fff;
  color: var(--ink);
  padding: 18px 22px;
  border-radius: 2px;
  box-shadow: var(--shadow-lg);
  min-width: 208px;
}
.hero__stat .num {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.hero__stat .num span { font-size: 15px; font-weight: 700; color: var(--text-2); letter-spacing: 0; }
.hero__stat .cap {
  font-size: 11.5px;
  color: var(--text-2);
  margin-top: 8px;
  line-height: 1.4;
  letter-spacing: .01em;
}

/* ---------- trust strip ---------- */

.trust { border-bottom: 1px solid var(--line); background: #fff; }
.trust .wrap {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.trust__item {
  padding: 30px 28px 30px 0;
  border-right: 1px solid var(--line);
}
.trust__item:last-child { border-right: 0; }
.trust__item + .trust__item { padding-left: 28px; }
.trust__kicker {
  font-size: 10.5px;
  font-weight: 800;
  letter-spacing: .16em;
  color: var(--amber);
  background: var(--ink);
  display: inline-block;
  padding: 3px 7px;
  margin-bottom: 12px;
  border-radius: 1px;
}
.trust__title { font-size: 15.5px; font-weight: 700; letter-spacing: -.01em; }
.trust__desc { font-size: 13px; color: var(--text-2); margin-top: 6px; line-height: 1.5; }

/* ---------- section shells ---------- */

.section { padding: 96px 0; }
.section--mist { background: var(--mist); }
.section--ink { background: var(--ink); color: #fff; }

.head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 40px;
  margin-bottom: 48px;
}
.head__left { max-width: 42em; }
.head h2 { margin: 14px 0 0; }
.head p { margin-top: 14px; }
.head__link { font-size: 14px; font-weight: 650; color: var(--ink); border-bottom: 2px solid var(--amber); padding-bottom: 3px; white-space: nowrap; }

/* ---------- product lines ---------- */

.lines {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.line {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 2px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow .22s ease, transform .22s ease, border-color .22s ease;
}
.line:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: transparent; }
.line__img { aspect-ratio: 4 / 3; overflow: hidden; background: var(--mist-2); }
.line__img img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 40%; transition: transform .5s ease; }
.line:hover .line__img img { transform: scale(1.04); }
.line__body { padding: 20px 20px 22px; border-top: 1px solid var(--line); }
.line__no {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .12em;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
}
.line__body h3 { font-size: 17px; margin: 8px 0 6px; letter-spacing: -.015em; }
.line__body p { font-size: 13px; color: var(--text-2); line-height: 1.5; }
.line__count { margin-top: 14px; font-size: 12px; color: var(--text-3); letter-spacing: .02em; }
.line__count b { color: var(--ink); font-weight: 750; }

/* ---------- product grid ---------- */

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 2px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow .22s ease, transform .22s ease, border-color .22s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: transparent; }

.card__img { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: var(--mist-2); }
.card__img img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 38%; transition: transform .5s ease; }
.card:hover .card__img img { transform: scale(1.035); }

.card__badge {
  position: absolute;
  top: 12px; left: 12px;
  background: rgba(15, 30, 40, .88);
  color: #fff;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: .1em;
  padding: 5px 9px;
  border-radius: 1px;
  backdrop-filter: blur(6px);
}
.card__badge--hot { background: var(--red); }
.card__badge--new { background: var(--amber); color: var(--ink); }

.card__body { padding: 20px 20px 22px; display: flex; flex-direction: column; flex: 1; }
.card__line { font-size: 10.5px; font-weight: 750; letter-spacing: .14em; text-transform: uppercase; color: var(--text-3); }
.card__title { font-size: 16px; font-weight: 700; letter-spacing: -.015em; line-height: 1.35; margin: 9px 0 0; }
.card__desc { font-size: 13px; color: var(--text-2); line-height: 1.5; margin-top: 8px; }

.card__foot {
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid var(--mist-2);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
}
.card__price { font-size: 19px; font-weight: 800; letter-spacing: -.03em; font-variant-numeric: tabular-nums; }
.card__price small { font-size: 11px; font-weight: 600; color: var(--text-3); letter-spacing: 0; margin-left: 3px; }
.card__sold { font-size: 12px; color: var(--text-2); text-align: right; line-height: 1.35; }
.card__sold b { display: block; font-size: 13.5px; color: var(--ink); font-weight: 750; font-variant-numeric: tabular-nums; }

.note { font-size: 12px; color: var(--text-3); margin-top: 28px; display: flex; gap: 8px; }
.note::before { content: "*"; color: #8a6100; font-weight: 800; }

/* ---------- OEM band ---------- */

.oem .wrap { padding-top: 96px; padding-bottom: 96px; }
.oem__top {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: end;
  margin-bottom: 64px;
}
.oem .h-section { color: #fff; }
.oem .lede { color: rgba(255, 255, 255, .66); }

.oem__brands {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
  font-size: 13px;
  letter-spacing: .18em;
  font-weight: 800;
  color: rgba(255, 255, 255, .34);
  text-transform: uppercase;
}
.oem__brands span { white-space: nowrap; }

.oem__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, .10);
  border: 1px solid rgba(255, 255, 255, .10);
}
.oem__cell { background: var(--ink); padding: 32px 28px 34px; }
.oem__cell .no {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .14em;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}
.oem__cell h3 { font-size: 18px; color: #fff; margin: 14px 0 10px; }
.oem__cell p { font-size: 13.5px; color: rgba(255, 255, 255, .58); line-height: 1.62; }

.oem__stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, .10);
  border: 1px solid rgba(255, 255, 255, .10);
  border-top: 0;
}
.oem__stat { background: var(--ink); padding: 30px 28px; }
.oem__stat .n {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -.035em;
  color: var(--amber);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.oem__stat .n span { font-size: 14px; letter-spacing: 0; }
.oem__stat .l { font-size: 12px; color: rgba(255, 255, 255, .50); margin-top: 10px; line-height: 1.45; }

/* ---------- technology ---------- */

.tech {
  display: grid;
  grid-template-columns: .95fr 1.05fr;
  gap: 80px;
  align-items: center;
}
.tech__media {
  aspect-ratio: 4 / 5;
  overflow: hidden;
  border-radius: 2px;
  background: var(--mist-2);
}
.tech__media img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 50%; }

.steps { margin-top: 40px; display: grid; gap: 0; }
.step {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 20px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}
.step:last-child { border-bottom: 1px solid var(--line); }
.step__no {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .06em;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
  padding-top: 2px;
}
.step h3 { font-size: 17px; letter-spacing: -.015em; }
.step p { font-size: 13.5px; color: var(--text-2); margin-top: 6px; line-height: 1.6; }

/* ---------- faq ---------- */

.faq { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; align-items: start; }
.qa { border-top: 1px solid var(--line); }
.qa:last-child { border-bottom: 1px solid var(--line); }
.qa__q {
  padding: 22px 0 0;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.01em;
  display: flex;
  justify-content: space-between;
  gap: 20px;
}
.qa__a { font-size: 14px; color: var(--text-2); line-height: 1.65; padding: 10px 0 22px; max-width: 46em; }

/* ---------- contact ---------- */

.contact { background: var(--ink); color: #fff; }
.contact .wrap {
  display: grid;
  grid-template-columns: .92fr 1.08fr;
  gap: 80px;
  padding-top: 96px;
  padding-bottom: 96px;
  align-items: start;
}
.contact h2 { color: #fff; margin: 14px 0 18px; }
.contact .lede { color: rgba(255, 255, 255, .66); }

.info { margin-top: 40px; display: grid; gap: 22px; }
.info__row { display: grid; grid-template-columns: 96px 1fr; gap: 16px; padding-top: 18px; border-top: 1px solid rgba(255, 255, 255, .12); }
.info__k { font-size: 11px; font-weight: 800; letter-spacing: .14em; color: var(--amber); text-transform: uppercase; padding-top: 3px; }
.info__v { font-size: 14px; color: rgba(255, 255, 255, .78); line-height: 1.6; }

.form {
  background: #fff;
  border-radius: 2px;
  padding: 34px;
  box-shadow: var(--shadow-lg);
}
.form__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: 11.5px; font-weight: 750; letter-spacing: .08em; text-transform: uppercase; color: var(--text-3); }
.field input, .field select, .field textarea {
  font-family: inherit;
  font-size: 14px;
  color: var(--text);
  background: var(--mist);
  border: 1px solid var(--line);
  border-radius: 1px;
  padding: 12px 13px;
  outline: none;
  transition: border-color .15s, background .15s;
  width: 100%;
}
.field input:focus, .field select:focus, .field textarea:focus {
  background: #fff;
  border-color: var(--ink);
}
.field textarea { resize: vertical; min-height: 92px; }
.form__actions { margin-top: 22px; display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap; }
.form__legal { font-size: 11.5px; color: var(--text-3); line-height: 1.5; max-width: 22em; }

/* ---------- footer ---------- */

.footer { background: #0a1620; color: rgba(255, 255, 255, .48); font-size: 13px; }
.footer .wrap { padding-top: 56px; padding-bottom: 34px; }
.footer__top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, .09);
}
.footer .brand__logo { height: 27px; }
.footer__about { margin-top: 18px; line-height: 1.65; max-width: 24em; }
.footer h4 { font-size: 11px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; color: rgba(255, 255, 255, .85); margin-bottom: 16px; }
.footer ul { list-style: none; display: grid; gap: 10px; }
.footer ul a:hover { color: var(--amber); }
.footer__bottom {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-top: 26px;
  font-size: 12px;
  color: rgba(255, 255, 255, .30);
  flex-wrap: wrap;
}

/* ---------- responsive ---------- */

@media (max-width: 1080px) {
  .hero .wrap { grid-template-columns: 1fr; gap: 48px; padding-top: 64px; padding-bottom: 72px; }
  .hero__stat { left: 24px; bottom: 24px; }
  .lines { grid-template-columns: repeat(2, 1fr); }
  .grid { grid-template-columns: repeat(2, 1fr); }
  .oem__top, .tech, .faq, .contact .wrap { grid-template-columns: 1fr; gap: 48px; }
  .oem__grid, .oem__stats { grid-template-columns: repeat(2, 1fr); }
  .footer__top { grid-template-columns: 1fr 1fr; gap: 36px; }
  .nav__links { display: none; }
}

@media (max-width: 720px) {
  .wrap { padding: 0 20px; }
  .section, .oem .wrap, .contact .wrap { padding-top: 64px; padding-bottom: 64px; }
  .topbar .wrap { justify-content: center; }
  .topbar .topbar__right { display: none; }
  .trust .wrap { grid-template-columns: 1fr 1fr; }
  .trust__item, .trust__item + .trust__item { padding: 24px 18px; border-right: 0; border-bottom: 1px solid var(--line); }
  .trust__item:nth-child(odd) { padding-left: 0; }
  .lines, .grid, .oem__grid, .oem__stats, .form__grid { grid-template-columns: 1fr; }
  .head { flex-direction: column; align-items: flex-start; gap: 18px; }
  .head__link { align-self: flex-start; }
  .tech__media { aspect-ratio: 1 / 1; }
  .form { padding: 24px; }
  .hero__stat { position: static; margin-top: 18px; box-shadow: none; border: 1px solid var(--line); }
}