:root {
  --navy: #0f1f3a;
  --navy-2: #182c4f;
  --red: #e8432e;
  --red-d: #c9351f;
  --sand: #f5f1ea;
  --paper: #ffffff;
  --ink: #16202e;
  --muted: #5d6878;
  --line: #e4ded3;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(15, 31, 58, .10);
  --font: "Archivo", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--sand);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
body.is-zh { font-family: "Noto Sans SC", "Archivo", system-ui, sans-serif; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { line-height: 1.15; margin: 0; }
p { margin: 0 0 1em; }

.container { width: min(1200px, 100% - 40px); margin-inline: auto; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 26px; border-radius: 999px; font-weight: 600; font-size: 15px;
  border: 2px solid transparent; cursor: pointer; transition: .2s ease; font-family: inherit;
}
.btn--primary { background: var(--red); color: #fff; }
.btn--primary:hover { background: var(--red-d); transform: translateY(-1px); }
.btn--ghost { border-color: var(--navy); color: var(--navy); }
.btn--ghost:hover { background: var(--navy); color: #fff; }
.btn--block { width: 100%; }

.eyebrow {
  text-transform: uppercase; letter-spacing: .14em; font-size: 12px; font-weight: 700;
  color: var(--red); margin-bottom: 12px;
}
.eyebrow--light { color: #ff8a77; }
.is-zh .eyebrow { letter-spacing: .2em; }

/* ---------- Top bar ---------- */
.topbar { background: var(--navy); color: #c9d3e3; font-size: 13px; }
.topbar__inner { display: flex; gap: 24px; padding: 8px 0; justify-content: flex-end; flex-wrap: wrap; }
.topbar__item { display: inline-flex; align-items: center; gap: 6px; }
.topbar__item svg { width: 15px; height: 15px; }
a.topbar__item:hover { color: #fff; }

/* ---------- Header ---------- */
.header {
  position: sticky; top: 0; z-index: 50; background: rgba(245, 241, 234, .94);
  backdrop-filter: blur(10px); border-bottom: 1px solid transparent; transition: .2s;
}
.header.is-scrolled { border-color: var(--line); box-shadow: 0 4px 20px rgba(15,31,58,.06); }
.header__inner { display: flex; align-items: center; gap: 24px; min-height: 76px; }
.brand { display: flex; align-items: center; gap: 12px; min-width: 0; flex: 0 1 auto; }
.brand__mark svg { width: 44px; height: 44px; flex-shrink: 0; }
.brand__text { display: flex; flex-direction: column; min-width: 0; }
.brand__name { font-weight: 800; font-size: 14px; letter-spacing: .02em; color: var(--navy); line-height: 1.25; }
.brand__sub { font-size: 12px; color: var(--muted); font-family: "Noto Sans SC", sans-serif; }

.nav { display: flex; gap: 26px; margin-left: auto; }
.nav a { font-weight: 500; font-size: 15px; color: var(--navy); position: relative; padding: 6px 0; }
.nav a::after { content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 2px; background: var(--red); transition: .2s; }
.nav a:hover::after { width: 100%; }

.header__actions { display: flex; align-items: center; gap: 12px; }
.lang { display: inline-flex; background: #fff; border: 1px solid var(--line); border-radius: 999px; padding: 3px; }
.lang__btn {
  border: 0; background: transparent; padding: 6px 12px; border-radius: 999px; font: inherit;
  font-size: 13px; font-weight: 600; color: var(--muted); cursor: pointer;
}
.lang__btn.is-active { background: var(--navy); color: #fff; }

.menu-btn { display: none; width: 42px; height: 42px; border: 0; background: var(--navy); border-radius: 10px; cursor: pointer; padding: 11px 10px; flex-direction: column; justify-content: space-between; }
.menu-btn span { display: block; height: 2px; background: #fff; border-radius: 2px; transition: .2s; }
.menu-btn.is-open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.menu-btn.is-open span:nth-child(2) { opacity: 0; }
.menu-btn.is-open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { padding: 64px 0 56px; overflow: hidden; }
.hero__grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center; }
.hero__title { font-size: clamp(36px, 5vw, 62px); font-weight: 800; color: var(--navy); letter-spacing: -.02em; margin-bottom: 20px; }
.is-zh .hero__title { letter-spacing: 0; font-weight: 900; }
.hero__lead { font-size: 18px; color: var(--muted); max-width: 540px; margin-bottom: 30px; }
.hero__cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 30px; }
.hero__points { list-style: none; padding: 0; margin: 0; display: flex; gap: 22px; flex-wrap: wrap; font-size: 14px; font-weight: 500; color: var(--navy); }
.hero__points li { display: flex; align-items: center; gap: 8px; }
.hero__points li::before { content: ""; width: 8px; height: 8px; background: var(--red); border-radius: 2px; transform: rotate(45deg); }

.hero__media { position: relative; padding: 0 0 0 40px; }
.mosaic { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.mosaic figure { margin: 0; background: #fff; border-radius: 20px; overflow: hidden; box-shadow: var(--shadow); aspect-ratio: 1; }
.mosaic figure:nth-child(2n) { transform: translateY(28px); }
.mosaic img { width: 100%; height: 100%; object-fit: contain; }
.hero__badge {
  position: absolute; bottom: -10px; left: 0; background: var(--navy); color: #fff;
  padding: 14px 18px; border-radius: 14px; display: flex; align-items: center; gap: 12px;
  max-width: 260px; box-shadow: var(--shadow); font-size: 13px; line-height: 1.35;
}
.hero__badge strong { font-size: 26px; color: var(--red); font-weight: 800; }

/* ---------- Category strip ---------- */
.cats { padding-bottom: 24px; }
.cats { padding-top: 40px; }
.cats__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.cat { display: grid; grid-template-columns: 120px 1fr; align-items: center; gap: 16px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 18px 12px 12px; transition: .2s; }
.cat:hover { border-color: var(--navy); box-shadow: var(--shadow); }
.cat img { width: 120px; height: 120px; object-fit: contain; border-radius: 10px; transition: transform .4s ease; }
.cat:hover img { transform: scale(1.05); }
.cat__label { display: flex; flex-direction: column; color: var(--navy); }
.cat__label b { font-size: 19px; }
.cat__label small { font-size: 13px; color: var(--muted); }

/* ---------- Sections ---------- */
.section { padding: 96px 0; }
.section__title { font-size: clamp(28px, 3.4vw, 42px); font-weight: 800; color: var(--navy); letter-spacing: -.015em; margin-bottom: 18px; }
.is-zh .section__title { letter-spacing: 0; }
.section__head { display: flex; justify-content: space-between; align-items: flex-end; gap: 30px; margin-bottom: 36px; }
.section__head--center { flex-direction: column; align-items: center; text-align: center; }
.section__note { max-width: 380px; color: var(--muted); font-size: 15px; margin: 0 0 18px; }

/* ---------- About ---------- */
.about { background: var(--paper); }
.about__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: center; }
.about__media { position: relative; padding: 0 50px 50px 0; }
.about__media > img:first-child { border-radius: 22px; aspect-ratio: 4 / 4.4; object-fit: cover; width: 100%; }
.about__media-sm { position: absolute; right: 0; bottom: 0; width: 48%; aspect-ratio: 1; object-fit: cover; border-radius: 18px; border: 8px solid var(--paper); box-shadow: var(--shadow); }
.about__copy p { color: var(--muted); font-size: 16.5px; }
.about__facts { display: grid; gap: 14px; margin-top: 28px; }
.about__facts div { display: flex; flex-direction: column; padding: 16px 20px; border-left: 3px solid var(--red); background: var(--sand); border-radius: 0 10px 10px 0; }
.about__facts b { color: var(--navy); font-size: 16px; }
.about__facts span { color: var(--muted); font-size: 14.5px; }

/* ---------- Products ---------- */
.filters { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 28px; }
.chip {
  border: 1px solid var(--line); background: #fff; color: var(--navy); font: inherit; font-weight: 600;
  font-size: 14px; padding: 9px 18px; border-radius: 999px; cursor: pointer; transition: .15s;
}
.chip:hover { border-color: var(--navy); }
.chip.is-active { background: var(--navy); color: #fff; border-color: var(--navy); }

.grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.card { background: #fff; border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column; transition: .25s; border: 1px solid var(--line); animation: fadeUp .4s ease both; }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card__media { position: relative; aspect-ratio: 1; background: #fff; overflow: hidden; border-bottom: 1px solid var(--line); }
.card__media img { width: 100%; height: 100%; object-fit: contain; transition: transform .5s; }
.card:hover .card__media img { transform: scale(1.05); }
.card__tag { position: absolute; top: 12px; left: 12px; background: rgba(255,255,255,.94); color: var(--navy); font-size: 11.5px; font-weight: 700; padding: 4px 10px; border-radius: 999px; text-transform: uppercase; letter-spacing: .06em; }
.card__body { padding: 16px 18px 18px; display: flex; flex-direction: column; flex: 1; }
.card__body h3 { font-size: 17px; color: var(--navy); margin-bottom: 6px; }
.card__body p { font-size: 14px; color: var(--muted); margin-bottom: 14px; flex: 1; }
.card__foot { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.card__sizes { font-size: 12.5px; color: var(--muted); font-weight: 500; }
.card__btn { font-size: 13.5px; font-weight: 700; color: var(--red); padding: 6px 14px; border: 1.5px solid var(--red); border-radius: 999px; transition: .15s; white-space: nowrap; }
.card__btn:hover { background: var(--red); color: #fff; }

@keyframes fadeUp { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

/* ---------- Services ---------- */
.services { background: var(--navy); color: #fff; }
.services .section__title { color: #fff; }
.services__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: rgba(255,255,255,.12); border-radius: var(--radius); overflow: hidden; }
.svc { background: var(--navy); padding: 34px 30px; transition: background .2s; }
.svc:hover { background: var(--navy-2); }
.svc__num { display: inline-block; font-weight: 800; color: var(--red); font-size: 14px; margin-bottom: 18px; letter-spacing: .1em; }
.svc h3 { font-size: 20px; margin-bottom: 10px; }
.svc p { color: #b6c2d6; font-size: 15px; margin: 0; }

/* ---------- Process ---------- */
.steps { list-style: none; padding: 0; margin: 10px 0 0; display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; counter-reset: s; position: relative; }
.steps::before { content: ""; position: absolute; top: 26px; left: 10%; right: 10%; height: 2px; background: repeating-linear-gradient(90deg, var(--red) 0 8px, transparent 8px 16px); }
.steps li { text-align: center; position: relative; padding: 0 6px; }
.steps span { width: 54px; height: 54px; display: grid; place-items: center; margin: 0 auto 18px; background: var(--sand); border: 2px solid var(--red); color: var(--red); border-radius: 50%; font-weight: 800; font-size: 20px; position: relative; }
.steps h4 { font-size: 17px; color: var(--navy); margin-bottom: 6px; }
.steps p { font-size: 14px; color: var(--muted); margin: 0; }

/* ---------- Band ---------- */
.band { position: relative; padding: 90px 0; overflow: hidden; background: var(--navy); }
.band > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .35; }
.band__inner { position: relative; display: flex; justify-content: space-between; align-items: center; gap: 30px; }
.band h2 { color: #fff; font-size: clamp(26px, 3.2vw, 40px); font-weight: 800; max-width: 680px; }

/* ---------- Contact ---------- */
.contact__grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 60px; align-items: start; }
.contact__company { font-weight: 800; color: var(--navy); font-size: 18px; margin-bottom: 2px; letter-spacing: .01em; }
.contact__company-zh { color: var(--muted); font-family: "Noto Sans SC", sans-serif; margin-bottom: 28px; }
.contact__list { list-style: none; padding: 0; margin: 0; display: grid; gap: 18px; }
.contact__list li { display: flex; flex-direction: column; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
.contact__label { font-size: 12px; text-transform: uppercase; letter-spacing: .12em; font-weight: 700; color: var(--red); margin-bottom: 4px; }
.contact__value { color: var(--navy); font-size: 16.5px; font-weight: 500; word-break: break-word; }
a.contact__value:hover { color: var(--red); }

.form { background: #fff; padding: 34px; border-radius: 20px; box-shadow: var(--shadow); display: grid; gap: 16px; }
.form h3 { font-size: 22px; color: var(--navy); margin-bottom: 4px; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form label { display: flex; flex-direction: column; gap: 6px; font-size: 13.5px; font-weight: 600; color: var(--navy); }
.form input, .form select, .form textarea {
  font: inherit; font-weight: 400; font-size: 15px; padding: 12px 14px; border: 1px solid var(--line);
  border-radius: 10px; background: var(--sand); color: var(--ink); width: 100%;
}
.form input:focus, .form select:focus, .form textarea:focus { outline: 2px solid var(--red); outline-offset: 1px; background: #fff; }
.form textarea { resize: vertical; }
.form__hint { font-size: 12.5px; color: var(--muted); margin: 0; text-align: center; }
.form__error { font-size: 13.5px; color: var(--red-d); margin: 0; text-align: center; font-weight: 600; }

/* ---------- Footer ---------- */
.footer { background: #0a1528; color: #aab6c9; padding: 56px 0 24px; font-size: 14.5px; }
.footer__grid { display: grid; grid-template-columns: 2fr 1fr 1.2fr; gap: 40px; padding-bottom: 36px; border-bottom: 1px solid rgba(255,255,255,.1); }
.footer__name { color: #fff; font-weight: 800; font-size: 17px; margin-bottom: 2px; }
.footer__zh { margin-bottom: 14px; font-family: "Noto Sans SC", sans-serif; }
.footer__addr { max-width: 380px; margin: 0; }
.footer__links, .footer__contact { display: flex; flex-direction: column; gap: 10px; }
.footer a:hover { color: #fff; }
.footer__bottom { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; padding-top: 20px; font-size: 13px; }

.fab { position: fixed; right: 20px; bottom: 20px; width: 54px; height: 54px; border-radius: 50%; background: var(--red); color: #fff; display: grid; place-items: center; box-shadow: 0 8px 24px rgba(232,67,46,.4); z-index: 40; transition: .2s; }
.fab:hover { transform: scale(1.08); }
.fab svg { width: 24px; height: 24px; }

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .nav { gap: 18px; }
  .brand__name { font-size: 12.5px; max-width: 230px; }
  .grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 920px) {
  .menu-btn { display: flex; }
  .header__actions { margin-left: auto; }
  .nav {
    position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; gap: 0;
    background: var(--sand); border-bottom: 1px solid var(--line); padding: 8px 20px 16px;
    display: none; box-shadow: 0 10px 20px rgba(15,31,58,.08);
  }
  .nav.is-open { display: flex; }
  .nav a { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .nav a::after { display: none; }

  .hero__grid, .about__grid, .contact__grid { grid-template-columns: 1fr; gap: 40px; }
  .hero__media { padding: 0 0 30px; max-width: 560px; }
  .cats__grid { grid-template-columns: 1fr; }
  .services__grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; gap: 0; text-align: left; }
  .steps::before { top: 10px; bottom: 10px; left: 26px; right: auto; width: 2px; height: auto; background: repeating-linear-gradient(180deg, var(--red) 0 8px, transparent 8px 16px); }
  .steps li { display: grid; grid-template-columns: 54px 1fr; column-gap: 18px; text-align: left; padding: 0 0 22px; }
  .steps span { grid-row: span 2; margin: 0; }
  .steps h4 { align-self: end; }
  .section__head { flex-direction: column; align-items: flex-start; gap: 0; }
  .section__head--center { align-items: center; }
  .band__inner { flex-direction: column; align-items: flex-start; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__grid > div:first-child { grid-column: 1 / -1; }
}

@media (max-width: 600px) {
  .container { width: calc(100% - 32px); }
  .topbar__hide-sm { display: none; }
  .topbar__inner { justify-content: center; gap: 16px; font-size: 12px; }
  .header__inner { gap: 10px; min-height: 68px; }
  .brand__mark svg { width: 38px; height: 38px; }
  .brand__name { font-size: 11px; max-width: 150px; }
  .brand__sub { font-size: 10.5px; }
  .lang__btn { padding: 5px 9px; font-size: 12px; }
  .hero { padding: 40px 0; }
  .hero__lead { font-size: 16px; }
  .mosaic { gap: 10px; }
  .mosaic figure { border-radius: 14px; }
  .mosaic figure:nth-child(2n) { transform: translateY(16px); }
  .hero__badge { bottom: 0; max-width: 210px; padding: 10px 12px; font-size: 12px; }
  .cat { grid-template-columns: 84px 1fr; }
  .cat img { width: 84px; height: 84px; }
  .section { padding: 64px 0; }
  .grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .card__body { padding: 12px; }
  .card__body h3 { font-size: 14.5px; }
  .card__body p { font-size: 12.5px; }
  .card__foot { flex-direction: column; align-items: stretch; }
  .card__btn { text-align: center; }
  .services__grid { grid-template-columns: 1fr; }
  .about__media { padding: 0 30px 30px 0; }
  .form { padding: 22px; }
  .form__row { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .cat__label b { font-size: 16px; }
  .cat__label small { font-size: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}