/* ============================================================
   Huakui Knitting — precision manufacturing stylesheet
   ============================================================ */
:root {
  --green: #0878C9;
  --forest: #064E83;
  --green-50: #EAF5FC;
  --green-20: #C8E6F8;
  --cream: #F5F8FA;
  --cream-2: #EAF0F4;
  --surface: #FFFFFF;
  --ink: #17212B;
  --muted: #5F6D79;
  --line: rgba(11, 62, 98, 0.14);
  --terra: #0878C9;
  --terra-50: #EAF5FC;
  --radius: 8px;
  --radius-sm: 5px;
  --radius-lg: 12px;
  --shadow: 0 2px 4px rgba(11,62,98,.06), 0 18px 44px rgba(11,62,98,.10);
  --serif: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --sans: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --maxw: 1200px;
}

/* ---------- reset / base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--cream);
  -webkit-font-smoothing: antialiased;
}
img, video, svg { max-width: 100%; display: block; }
a { color: var(--forest); text-decoration: none; }
a:hover { color: var(--green); }
h1, h2, h3 { font-family: var(--sans); font-weight: 750; line-height: 1.12; margin: 0 0 .5em; color: var(--ink); letter-spacing: -.025em; }
h1 { font-size: clamp(2.4rem, 5vw, 4.7rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; list-style: none; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
[id] { scroll-margin-top: 84px; }
.eyebrow {
  font-family: var(--sans);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--green);
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  margin: 0 0 .8em;
}
.eyebrow::before { content: ""; width: 28px; height: 2px; background: currentColor; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4em;
  font-family: var(--sans);
  font-size: .95rem;
  font-weight: 500;
  padding: .7em 1.4em;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, background .2s ease, color .2s ease, border-color .2s ease;
  text-decoration: none;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--green); color: #fff; box-shadow: 0 8px 22px rgba(8,120,201,.22); }
.btn-primary:hover { background: #0566ae; color: #fff; }
.btn-ghost { background: transparent; color: var(--forest); border-color: var(--forest); }
.btn-ghost:hover { background: var(--forest); color: #fff; }
.btn-lg { padding: .85em 1.8em; font-size: 1rem; }
.btn-block { width: 100%; }

/* ---------- bands ---------- */
.band { padding: clamp(4rem, 8vw, 7rem) 0; }
.band:nth-child(even) { background: var(--surface); }
.section-head { max-width: 720px; margin: 0 auto clamp(2rem,4vw,3rem); text-align: center; }
.section-sub { color: var(--muted); font-size: 1.05rem; }

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 1.5rem; height: 76px; }
.brand { display: flex; align-items: center; gap: .55rem; color: var(--ink); font-weight: 500; }
.brand-mark { display: inline-flex; width: 42px; height: 42px; align-items: center; justify-content: center; }
.brand-mark img { width: 42px; height: 42px; object-fit: contain; }
.brand-text { font-family: var(--sans); font-size: 1.16rem; font-weight: 800; letter-spacing: -.02em; color: var(--ink); }
.nav-desktop { display: flex; gap: 1.6rem; margin-left: auto; }
.nav-desktop a { color: var(--ink); font-size: .95rem; }
.nav-desktop a:hover { color: var(--green); }
.header-actions { display: flex; align-items: center; gap: .8rem; }
.lang-switch { position: relative; }
.lang-toggle {
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: .35em .8em;
  font-size: .82rem;
  font-weight: 600;
  color: var(--forest);
  text-transform: uppercase;
  cursor: pointer;
}
.lang-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  min-width: 120px;
  padding: 4px;
  display: none;
}
.lang-menu.open { display: block; }
.lang-menu a { display: block; padding: .5em .8em; font-size: .9rem; border-radius: 4px; }
.lang-menu a:hover { background: var(--green-50); }
.nav-toggle { display: none; flex-direction: column; gap: 4px; width: 28px; height: 22px; justify-content: center; background: none; border: 0; cursor: pointer; }
.nav-toggle span { display: block; height: 2px; background: var(--forest); border-radius: 2px; }
.nav-mobile { display: none; flex-direction: column; gap: 1rem; padding: 1rem 24px 1.5rem; border-top: 1px solid var(--line); }
.nav-mobile.open { display: flex; }
.nav-mobile a { color: var(--ink); }

/* ---------- hero ---------- */
.hero { position: relative; padding-top: clamp(3.5rem, 7vw, 6.5rem); overflow: hidden; background: #fff; }
.hero-bg { position: absolute; inset: 0; background: linear-gradient(118deg, #fff 0%, #fff 48%, #e9f4fb 48%, #d8eaf5 100%); }
.hero-bg::after { content: ""; position: absolute; width: 420px; height: 420px; border: 1px solid rgba(8,120,201,.15); border-radius: 50%; right: -180px; top: -210px; }
.hero-bg-tint { position: absolute; inset: 0; background: linear-gradient(90deg, transparent 0 47%, rgba(8,120,201,.045) 47% 100%); }
.hero-inner { position: relative; display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(2.5rem,6vw,6rem); align-items: center; padding-bottom: 3rem; }
.hero-title { margin: .22em 0 .42em; max-width: 12ch; }
.hero-sub { color: var(--muted); font-size: 1.1rem; max-width: 36em; }
.hero-cta { display: flex; gap: .8rem; flex-wrap: wrap; margin-top: 1.4rem; }
.hero-media { position: relative; }
.hero-video { position: relative; background: #0b2638; border: 8px solid #fff; border-radius: 2px; padding: 0; box-shadow: 22px 24px 0 #0878C9, var(--shadow); }
.hero-video::before { content: "FACTORY / FOSHAN"; position: absolute; z-index: 2; top: 16px; left: 16px; padding: .42rem .6rem; background: rgba(7,32,49,.78); color: #fff; font-size: .68rem; font-weight: 700; letter-spacing: .12em; }
.hero-video video { width: 100%; border-radius: 0; aspect-ratio: 4 / 3; object-fit: cover; background: #0b2638; }
.hero-video-label { display: block; text-align: center; font-size: .82rem; color: var(--muted); margin-top: .6rem; }
.trust-strip {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  padding: 2rem 24px 3.5rem;
  border-top: 1px solid var(--line);
}
.trust-strip li { text-align: center; }
.trust-value { display: block; font-family: var(--sans); font-weight: 800; font-size: 2rem; color: var(--forest); }
.trust-label { display: block; font-size: .82rem; color: var(--muted); }

/* ---------- certifications ---------- */
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.cert-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 1.5rem 1.25rem;
  text-align: center;
}
.cert-badge {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.1rem;
  color: var(--green);
  border: 1px solid var(--green-20);
  background: var(--green-50);
  border-radius: 999px;
  padding: .4em 1em;
  display: inline-block;
  margin-bottom: .8rem;
}
.cert-card p { color: var(--muted); font-size: .9rem; margin: 0; }

/* ---------- capabilities ---------- */
.cap-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.cap-card { background: var(--surface); border: 1px solid var(--line); border-top: 3px solid var(--green); border-radius: 2px; padding: 1.8rem 1.45rem; box-shadow: 0 10px 30px rgba(11,62,98,.05); }
.cap-icon { width: 44px; height: 44px; border-radius: 12px; background-color: var(--green-50); background-repeat: no-repeat; background-position: center; background-size: 24px 24px; margin-bottom: .8rem; }
.cap-icon-draw { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235C7A5A' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 20h9'/%3E%3Cpath d='M16.5 3.5a2.12 2.12 0 0 1 3 3L7 19l-4 1 1-4Z'/%3E%3C/svg%3E"); }
.cap-icon-design { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235C7A5A' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='3' y='3' width='18' height='18' rx='2'/%3E%3Cpath d='M3 9h18'/%3E%3Cpath d='M9 21V9'/%3E%3C/svg%3E"); }
.cap-icon-proto { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235C7A5A' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 2l9 5v10l-9 5-9-5V7z'/%3E%3Cpath d='M12 22V12'/%3E%3Cpath d='M3 7l9 5 9-5'/%3E%3C/svg%3E"); }
.cap-icon-rnd { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235C7A5A' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M9 3h6'/%3E%3Cpath d='M10 3v6L5 19a2 2 0 0 0 2 3h10a2 2 0 0 0 2-3l-5-10V3'/%3E%3Cpath d='M7 14h10'/%3E%3C/svg%3E"); }
.cap-card h3 { font-size: 1.1rem; margin-bottom: .4em; }
.cap-card p { color: var(--muted); font-size: .92rem; margin: 0; }

/* ---------- partners ---------- */
.partners { background: var(--cream-2); }
.logo-wall { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.logo-tile {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  height: 122px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform .15s ease;
}
.logo-tile:hover { transform: translateY(-2px); }
.logo-tile img { width: 72%; height: 72px; object-fit: contain; mix-blend-mode: multiply; }

/* ---------- factory ---------- */
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-bottom: 2.5rem; }
.stat { background: #fff; border: 1px solid var(--line); border-left: 4px solid var(--green); border-radius: 2px; padding: 1.5rem 1rem; text-align: center; }
.stat-value { display: block; font-family: var(--serif); font-size: 1.9rem; color: var(--forest); }
.stat-label { display: block; font-size: .84rem; color: var(--muted); margin-top: .2rem; }
.factory-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; }
.factory-block h3 { color: var(--forest); border-bottom: 2px solid var(--green-20); padding-bottom: .4rem; margin-bottom: 1rem; }
.bullet-list li { position: relative; padding-left: 1.4rem; margin-bottom: .7rem; color: var(--ink); }
.bullet-list li::before { content: ""; position: absolute; left: 0; top: .6em; width: 7px; height: 7px; background: var(--green); border-radius: 50%; }
.bullet-list strong { color: var(--forest); }

/* ---------- process ---------- */
.step-flow { display: grid; grid-template-columns: repeat(6, 1fr); gap: .8rem; counter-reset: step; }
.step { position: relative; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.3rem 1rem; }
.step-num {
  display: inline-flex; width: 30px; height: 30px; align-items: center; justify-content: center;
  background: var(--green); color: #fff; border-radius: 2px; font-family: var(--sans); font-weight: 700; font-size: .9rem;
  margin-bottom: .6rem;
}
.step h3 { font-size: 1rem; margin-bottom: .3em; }
.step p { font-size: .85rem; color: var(--muted); margin: 0; }

/* ---------- quality ---------- */
.quality-cols { display: grid; grid-template-columns: 1.4fr 1fr; gap: 3rem; align-items: start; }
.quality-story .lead { font-size: 1.1rem; color: var(--ink); margin-bottom: 1.2rem; }
.metric-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.metric { background: linear-gradient(145deg, #064E83, #0878C9); border-radius: 2px; padding: 1.6rem 1.2rem; color: #fff; }
.metric-value { display: block; font-family: var(--serif); font-size: 1.9rem; }
.metric-label { display: block; font-size: .82rem; opacity: .85; margin-top: .2rem; }

/* ---------- products preview ---------- */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.product-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: transform .15s ease, box-shadow .2s ease; }
.product-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.product-card-link { display: block; color: inherit; }
.product-thumb { display: block; aspect-ratio: 1 / 1; background: var(--green-50); overflow: hidden; }
.product-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s ease; }
.product-card:hover .product-thumb img { transform: scale(1.035); }
.product-body { padding: 1.1rem 1.1rem 1.3rem; }
.product-body h3 { font-size: 1.05rem; margin-bottom: .3em; }
.product-body p { color: var(--muted); font-size: .88rem; margin: 0 0 .5em; }
.product-materials { font-size: .8rem; color: var(--green); font-weight: 500; }

/* ---------- sustainability ---------- */
.eco-intro { max-width: 760px; margin: 0 auto 2rem; text-align: center; font-size: 1.1rem; color: var(--muted); }
.eco-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.eco-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.5rem 1.25rem; }
.eco-leaf { display: inline-flex; margin-bottom: .7rem; }
.eco-card h3 { font-size: 1.05rem; margin-bottom: .3em; }
.eco-card p { color: var(--muted); font-size: .88rem; margin: 0; }
.eco-note { text-align: center; font-size: .85rem; color: var(--muted); margin-top: 1.5rem; font-style: italic; }

/* ---------- why us ---------- */
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.why-item { display: flex; gap: .7rem; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.3rem 1.1rem; }
.why-check { flex: 0 0 auto; margin-top: 2px; }
.why-item h3 { font-size: 1rem; margin: 0 0 .2em; }
.why-item p { color: var(--muted); font-size: .85rem; margin: 0; }

/* ---------- inquiry ---------- */
.inquiry { background: linear-gradient(120deg, #062f4d 0%, #075b94 55%, #0878c9 100%); color: #fff; }
.inquiry h2, .inquiry .eyebrow { color: #fff; }
.inquiry .section-sub, .inquiry-contact span { color: rgba(255,255,255,.74); }
.inquiry-contact a { color: #fff; font-weight: 600; }
.inquiry-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 3rem; align-items: start; }
.inquiry-contact { margin-top: 1.5rem; }
.inquiry-contact li { margin-bottom: .4rem; }
.inquiry-contact span { color: var(--muted); font-size: .9rem; }
.inquiry-form {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  box-shadow: var(--shadow);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.inquiry-form label { display: block; font-size: .85rem; font-weight: 500; color: var(--forest); }
.inquiry-form .form-full { grid-column: 1 / -1; }
.inquiry-form input, .inquiry-form select, .inquiry-form textarea {
  width: 100%;
  margin-top: .35rem;
  padding: .6rem .7rem;
  font-family: var(--sans);
  font-size: .95rem;
  color: var(--ink);
  background: var(--cream);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}
.inquiry-form textarea { resize: vertical; }
.inquiry-form .btn { grid-column: 1 / -1; }
.form-note { grid-column: 1 / -1; font-size: .78rem; color: var(--muted); margin: 0; }
.form-success { grid-column: 1 / -1; background: var(--green-50); color: var(--forest); border-radius: var(--radius-sm); padding: .8rem 1rem; font-size: .9rem; margin: 0; }
.honey { position: absolute; left: -9999px; }

/* ---------- catalog page ---------- */
.catalog-list { display: flex; flex-direction: column; gap: 1.5rem; }
.cat-block { display: grid; grid-template-columns: 220px 1fr; gap: 1.8rem; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 1.5rem; align-items: center; }
.cat-thumb { aspect-ratio: 1 / 1; border-radius: var(--radius); background: var(--green-50); overflow: hidden; }
.cat-thumb img { width: 100%; height: 100%; object-fit: cover; }
.cat-materials { font-size: .8rem; color: var(--green); font-weight: 600; letter-spacing: .04em; text-transform: uppercase; margin: 0 0 .4em; }
.cat-body h2 { margin: 0 0 .3em; }
.cat-desc { color: var(--muted); margin: 0 0 1.2em; max-width: 52ch; }
@media (max-width: 640px) { .cat-block { grid-template-columns: 1fr; } .cat-thumb { aspect-ratio: 16 / 9; } }

/* ---------- footer ---------- */
.site-footer { background: #061D2D; color: #c9d4dc; padding: 3rem 0 2rem; }
.footer-inner { display: flex; justify-content: space-between; gap: 2rem; flex-wrap: wrap; }
.footer-legal { font-family: var(--serif); font-size: 1.1rem; color: #fff; margin: 0 0 .3em; }
.footer-addr { color: #7cc7f5; margin-bottom: .6em; }
.footer-contact { margin: .15em 0; font-size: .9rem; }
.footer-contact a { color: #e6e6df; }
.footer-tag { margin-top: 1rem; font-style: italic; color: #9a9a92; }
.footer-meta { text-align: right; }
.footer-certs { color: #7cc7f5; font-size: .85rem; margin-bottom: .6em; }
.footer-copy { font-size: .8rem; color: #8a8a82; }
.footer-copy a { color: #7cc7f5; }

/* ---------- reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .btn:hover { transform: none; }
}

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; gap: 2rem; }
  .hero-media { order: -1; }
  .trust-strip { grid-template-columns: repeat(2, 1fr); gap: 1.5rem 1rem; }
  .cert-grid, .cap-grid, .stat-grid, .eco-grid, .why-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .step-flow { grid-template-columns: repeat(3, 1fr); }
  .factory-cols, .quality-cols, .inquiry-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-meta { text-align: left; }
}
@media (max-width: 720px) {
  .nav-desktop { display: none; }
  .nav-toggle { display: flex; }
  .header-actions .btn-primary { display: none; }
  .logo-wall { grid-template-columns: repeat(2, 1fr); }
  .step-flow { grid-template-columns: repeat(2, 1fr); }
  .metric-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .container { padding: 0 18px; }
  .cert-grid, .cap-grid, .stat-grid, .eco-grid, .why-grid, .product-grid, .step-flow { grid-template-columns: 1fr; }
  .inquiry-form { grid-template-columns: 1fr; padding: 1.4rem; }
  .inquiry-form .form-row { grid-column: 1 / -1; display: block; }
}