/* ===== Design Tokens ===== */
:root {
  --red: #cf2e2e;
  --red-dark: #a82424;
  --red-light: #e85a5a;
  --ink: #1a1a1a;
  --ink-soft: #3a3a3a;
  --gray: #6b6b6b;
  --line: #e5e5e5;
  --bg: #ffffff;
  --bg-soft: #f6f6f6;
  --font-head: 'Barlow Condensed', 'Arial Narrow', sans-serif;
  --font-body: 'Barlow', 'Segoe UI', sans-serif;
  --shadow-sm: 0 2px 8px rgba(0,0,0,.06);
  --shadow-md: 0 8px 28px rgba(0,0,0,.10);
  --radius: 10px;
  --max-w: 1200px;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { font-family: var(--font-head); line-height: 1.1; margin: 0 0 .5em; font-weight: 700; letter-spacing: .01em; text-transform: uppercase; }
p { margin: 0 0 1em; }
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-title {
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  text-align: center;
  text-transform: uppercase;
}
.section-title.left { text-align: left; }
.section-sub { text-align: center; color: var(--gray); margin-top: -6px; }
.section-sub + * { margin-top: 0; }

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 12px 26px;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  border-radius: 4px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background .2s, color .2s, border-color .2s, transform .15s;
  text-align: center;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--red); color: #fff; }
.btn-primary:hover { background: var(--red-dark); }
.btn-ghost { background: transparent; color: #fff; border-color: #fff; }
.btn-ghost:hover { background: #fff; color: var(--ink); }
.btn-lg { padding: 15px 34px; font-size: 1.1rem; }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 24px; height: 88px; }
.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-logo { display: flex; }
.header-logo { display: block; height: 64px; width: auto; }
.footer-logo { display: block; height: 50px; width: auto; opacity: .9; }
.brand-text { display: flex; flex-direction: column; line-height: 1.05; }
.brand-text strong { font-family: var(--font-head); font-size: 1.35rem; letter-spacing: .06em; color: var(--ink); }
.brand-text small { font-size: .68rem; color: var(--gray); text-transform: uppercase; letter-spacing: .04em; }
.main-nav { display: flex; gap: 28px; margin-left: auto; }
.main-nav a { font-family: var(--font-head); font-weight: 600; text-transform: uppercase; letter-spacing: .05em; font-size: .98rem; color: var(--ink-soft); padding: 6px 0; border-bottom: 2px solid transparent; }
.main-nav a:hover { color: var(--red); border-bottom-color: var(--red); }
.header-tools { display: flex; align-items: center; gap: 16px; margin-left: auto; }
.nav-cta { flex-shrink: 0; }
.wa-btn { display: inline-flex; align-items: center; gap: 8px; }
.wa-btn svg { flex-shrink: 0; }

.lang-switch { display: flex; border: 1px solid var(--line); border-radius: 4px; overflow: hidden; }
.lang-btn {
  flex: 0 0 auto;
  background: #fff;
  border: 0;
  padding: 6px 12px;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: .85rem;
  letter-spacing: .04em;
  cursor: pointer;
  color: var(--gray);
  transition: background .15s, color .15s;
}
.lang-btn.active { background: var(--red); color: #fff; }
.lang-btn + .lang-btn { border-left: 1px solid var(--line); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--ink); transition: transform .25s, opacity .25s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Hero ===== */
.hero { position: relative; color: #fff; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; background-size: cover; background-position: center; transform: scale(1.02); }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(10,10,10,.88) 0%, rgba(20,20,20,.72) 45%, rgba(20,20,20,.35) 100%); }
.hero-inner { position: relative; padding: 96px 24px; max-width: var(--max-w); margin: 0 auto; }
.hero-badge {
  display: inline-block;
  background: var(--red);
  color: #fff;
  font-family: var(--font-head);
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  font-size: .85rem;
  padding: 6px 14px;
  border-radius: 3px;
  margin-bottom: 22px;
}
.hero-title { font-size: clamp(2.4rem, 6vw, 4.2rem); max-width: 16ch; margin-bottom: .45em; }
.hero-sub { font-size: clamp(1rem, 1.6vw, 1.2rem); max-width: 56ch; color: rgba(255,255,255,.92); }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin: 28px 0 40px; }
.hero-stats { display: flex; gap: 48px; flex-wrap: wrap; }
.stat strong { display: block; font-family: var(--font-head); font-size: 2.4rem; line-height: 1; color: var(--red-light); }
.stat span { font-size: .9rem; color: rgba(255,255,255,.85); text-transform: uppercase; letter-spacing: .04em; }

/* ===== Props ===== */
.props { background: var(--bg-soft); border-bottom: 1px solid var(--line); }
.props-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; padding: 52px 24px; }
.prop h3 { font-size: 1.15rem; margin: 10px 0 6px; }
.prop p { font-size: .92rem; color: var(--gray); margin: 0; }
.prop-icon { font-size: 1.6rem; }

/* ===== Categories ===== */
.cat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; margin-top: 40px; }
.cat-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: transform .2s, box-shadow .2s; }
.cat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.cat-card img { object-fit: contain; width: 100%; height: auto; display: block; }
.cat-body { padding: 16px 18px; }
.cat-body h3 { margin: 0 0 4px; font-size: 1.2rem; }
.cat-body p { margin: 0; color: var(--gray); font-size: .88rem; }

/* ===== Products ===== */
.products { background: var(--bg-soft); }
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 40px; }
.product-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform .2s, box-shadow .2s;
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.product-img { background: #fff; padding: 14px; }
.product-img img { object-fit: contain; width: 100%; height: auto; }
.product-body { padding: 0 20px 20px; display: flex; flex-direction: column; flex: 1; }
.product-cat { font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; color: var(--red); font-weight: 600; }
.product-body h3 { margin: 6px 0 8px; font-size: 1.35rem; }
.product-body p { font-size: .9rem; color: var(--gray); flex: 1; }
.product-link { font-family: var(--font-head); font-weight: 600; text-transform: uppercase; letter-spacing: .04em; color: var(--red); font-size: .92rem; margin-top: 8px; }
.product-link:hover { color: var(--red-dark); }

/* ===== Factory ===== */
.block-title { font-size: 1.6rem; text-transform: uppercase; margin-bottom: 16px; }
.factory-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; margin-top: 40px; }
.factory-text p { color: var(--ink-soft); }
.factory-list { list-style: none; padding: 0; margin: 20px 0 0; }
.factory-list li { position: relative; padding-left: 26px; margin-bottom: 10px; color: var(--ink-soft); }
.factory-list li::before { content: "✓"; position: absolute; left: 0; color: var(--red); font-weight: 700; }
.factory-gallery { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.factory-gallery img { border-radius: 8px; width: 100%; height: auto; }

/* ===== Brand ===== */
.brand-section { background: var(--ink); color: #fff; }
.brand-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.brand-text p { color: rgba(255,255,255,.82); }
.brand-visual img { border-radius: 10px; width: 100%; height: auto; }

/* ===== Blog ===== */
.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 40px; }
.blog-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column; transition: transform .2s, box-shadow .2s; }
.blog-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.blog-img { background: #fff; padding: 14px; }
.blog-img img { aspect-ratio: 1 / 1; object-fit: contain; width: 100%; }
.blog-body { padding: 0 20px 20px; display: flex; flex-direction: column; flex: 1; }
.blog-body time { font-size: .78rem; color: var(--gray); text-transform: uppercase; letter-spacing: .06em; }
.blog-body h3 { margin: 8px 0 10px; font-size: 1.2rem; line-height: 1.2; }
.blog-body p { font-size: .9rem; color: var(--gray); flex: 1; }
.blog-body .product-link { margin-top: 8px; }

/* ===== Contact ===== */
.contact-form { max-width: 720px; margin: 36px auto 0; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-field { margin-bottom: 20px; }
.form-field label { display: block; font-family: var(--font-head); font-weight: 600; text-transform: uppercase; letter-spacing: .04em; font-size: .9rem; margin-bottom: 6px; }
.form-field input, .form-field select, .form-field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-family: var(--font-body);
  font-size: 1rem;
  background: #fff;
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
  outline: 2px solid var(--red);
  outline-offset: 1px;
  border-color: transparent;
}
.form-note { margin-top: 14px; font-weight: 600; }
.form-note.ok { color: #1a7f37; }
.form-note.err { color: var(--red); }

/* ===== Footer ===== */
.site-footer { background: #111; color: rgba(255,255,255,.75); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 40px; padding: 60px 24px 40px; }
.brand-footer { background: transparent; }
.brand-footer strong { color: #fff; }
.brand-footer small { color: rgba(255,255,255,.5); }
.footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: 14px; }
.footer-col a { display: block; margin-bottom: 8px; font-size: .92rem; }
.footer-col a:hover { color: var(--red-light); }
.footer-col p { font-size: .92rem; margin-bottom: 6px; }
.footer-social { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
.footer-social .social-btn { display: inline-flex; align-items: center; justify-content: center; width: 38px; height: 38px; margin: 0; border-radius: 50%; background: rgba(255,255,255,.12); color: #fff; transition: background .2s ease, transform .2s ease; }
.footer-social .social-btn:hover { background: var(--red); color: #fff; transform: translateY(-2px); }
.footer-social .social-btn svg { width: 18px; height: 18px; fill: currentColor; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding: 22px 24px; text-align: center; font-size: .85rem; color: rgba(255,255,255,.5); }
.footer-bottom p { margin: 0; }

/* ===== Responsive ===== */
@media (max-width: 960px) {
  .props-grid { grid-template-columns: repeat(2, 1fr); }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .blog-grid { grid-template-columns: 1fr; }
  .factory-grid, .brand-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }

  /* 平板 + 手机：两行 header（第一行 logo 左 + 语言切换+WhatsApp 右，第二行汉堡居中） */
  .header-inner {
    display: grid;
    grid-template-columns: 1fr auto auto;
    grid-template-areas:
      "brand lang wa"
      "toggle toggle toggle";
    gap: 8px 12px;
    height: auto;
    padding: 12px 0;
  }
  .brand { grid-area: brand; padding-left: 6px; }
  .header-tools { display: contents; }
  .lang-switch { grid-area: lang; align-self: center; width: fit-content; }
  .nav-cta { grid-area: wa; align-self: center; margin-right: 6px; }
  .nav-toggle { display: flex; grid-area: toggle; justify-self: center; }
  .main-nav {
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    margin-left: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-md);
    padding: 8px 24px 16px;
    display: none;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 14px 0; border-bottom: 1px solid var(--line); }
}

@media (max-width: 640px) {
  .section { padding: 56px 0; }
  .header-logo { height: 48px; }
  /* WhatsApp 按钮只保留图标，节省 header 空间 */
  .nav-cta.wa-btn { padding: 9px 12px; gap: 0; }
  .nav-cta.wa-btn span { display: none; }
  .hero-inner { padding: 64px 20px; }
  .hero-stats { gap: 24px; }
  .stat strong { font-size: 1.9rem; }
  .form-row { grid-template-columns: 1fr; }
  .props-grid, .cat-grid, .product-grid, .blog-grid, .footer-grid { grid-template-columns: 1fr; }
}