:root {
  --dark: #111827;
  --blue: #0f4c81;
  --light: #f5f7fa;
  --gray: #6b7280;
  --border: #e5e7eb;
  --accent: #f59e0b;
  --blue-light: #eaf2f8;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: Arial, "Noto Sans TC", sans-serif; color: var(--dark); line-height: 1.6; }
img { -webkit-user-drag: none; user-drag: none; pointer-events: none; }

/* ── Header ── */
header {
  padding: 0 6%;
  height: 124px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border);
  background: white;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 8px rgba(0,0,0,.06);
}
.logo { text-decoration: none; display: inline-flex; align-items: center; }
.logo img { height: 104px; width: auto; display: block; }
nav a {
  margin-left: 28px;
  text-decoration: none;
  color: var(--dark);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .02em;
  transition: color .2s;
}
nav a:hover, nav a.active { color: var(--blue); }
.nav-cta {
  margin-left: 28px;
  background: var(--accent);
  color: #111;
  padding: 10px 22px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: .02em;
  transition: opacity .2s;
}
.nav-cta:hover { opacity: .88; }

/* ── Language Switch ── */
.lang-switch {
  margin-left: 12px;
  padding: 6px 14px;
  border: 1.5px solid var(--blue);
  border-radius: 6px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: .05em;
  transition: all .2s;
}
.lang-switch:hover {
  background: var(--blue);
  color: white;
}

/* ── Buttons ── */
.btn {
  display: inline-block;
  background: var(--accent);
  color: #111;
  padding: 13px 24px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 700;
  font-size: 16px;
}
.btn.outline {
  background: white;
  color: var(--blue);
  border: 2px solid var(--blue);
}
.btn:hover { opacity: .88; }

/* ── Page Hero ── */
.page-hero {
  background: linear-gradient(135deg, #f8fafc 0%, #eaf2f8 100%);
  padding: 60px 6% 50px;
  border-bottom: 1px solid var(--border);
}
.page-hero h1 { font-size: 40px; margin: 0 0 10px; }
.page-hero p { color: var(--gray); font-size: 18px; margin: 0; max-width: 700px; }

/* ── Sections ── */
section { padding: 70px 6%; }
h2 { font-size: 34px; margin: 0 0 10px; }
.section-sub { color: var(--gray); max-width: 760px; margin: 0 0 34px; font-size: 17px; }

/* ── Cards ── */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card {
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 28px;
  background: white;
}
.card h3 { margin-top: 0; color: var(--blue); font-size: 20px; }
.card p { color: var(--gray); }

/* ── Tags ── */
.tag {
  display: inline-block;
  background: var(--blue-light);
  color: var(--blue);
  padding: 4px 12px;
  border-radius: 99px;
  font-size: 13px;
  margin: 4px 4px 0 0;
}

/* ── Dark section ── */
.dark { background: var(--dark); color: white; }
.dark h2 { color: white; }
.dark .section-sub { color: #cbd5e1; }
.dark .card { background: #1f2937; border-color: #374151; }
.dark .card h3 { color: var(--accent); }
.dark .card p { color: #9ca3af; }

/* ── Gallery ── */
.gallery { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.photo {
  height: 190px;
  border-radius: 16px;
  background: linear-gradient(145deg, #e5e7eb, #ffffff);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #6b7280;
  padding: 20px;
  font-weight: 700;
  font-size: 14px;
  overflow: hidden;
  position: relative;
}
.photo img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 16px;
}
.photo .photo-sub {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(17,24,39,.72);
  color: white;
  padding: 8px 12px;
  font-size: 12px;
  font-weight: 400;
  border-radius: 0 0 16px 16px;
  text-align: left;
  line-height: 1.5;
}

/* ── Stats ── */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 32px; }
.stat { background: white; padding: 18px 20px; border-radius: 14px; border: 1px solid var(--border); }
.stat strong { display: block; font-size: 26px; color: var(--blue); }
.stat span { font-size: 14px; color: var(--gray); }

/* ── Spec table ── */
.spec-table { width: 100%; border-collapse: collapse; margin-top: 20px; }
.spec-table th, .spec-table td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border); }
.spec-table th { background: var(--blue-light); color: var(--blue); font-size: 14px; }
.spec-table tr:last-child td { border-bottom: none; }

/* ── RFQ form ── */
.rfq-wrap { background: var(--light); }
.rfq-form { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; max-width: 860px; }
.rfq-form input, .rfq-form select, .rfq-form textarea {
  width: 100%;
  padding: 13px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  background: white;
  font-family: inherit;
}
.rfq-form .full { grid-column: span 2; }
.rfq-form textarea { min-height: 130px; }
.rfq-form input[type="file"] { background: white; cursor: pointer; }

/* ── Process steps ── */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 30px; }
.step { padding: 24px; text-align: center; position: relative; }
.step:not(:last-child)::after {
  content: "→";
  position: absolute;
  right: -10px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  color: var(--blue);
}
.step-num {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--blue);
  color: white;
  font-size: 18px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 12px;
}
.step h4 { margin: 0 0 6px; font-size: 15px; }
.step p { font-size: 13px; color: var(--gray); margin: 0; }

/* ── Contact ── */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; align-items: start; }
.contact-info h3 { color: var(--blue); margin-top: 28px; font-size: 16px; margin-bottom: 6px; }
.contact-info h3:first-child { margin-top: 0; }
.map-placeholder {
  background: linear-gradient(145deg, #cbd5e1, #e5e7eb);
  border-radius: 18px;
  height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #475569;
  font-weight: 700;
  font-size: 16px;
  text-align: center;
}

/* ── Why us ── */
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.why-card {
  background: var(--blue-light);
  border-radius: 18px;
  padding: 28px;
}
.why-card .icon { font-size: 28px; margin-bottom: 12px; }
.why-card h3 { margin: 0 0 8px; color: var(--blue); }
.why-card p { color: var(--gray); margin: 0; font-size: 15px; }

/* ── CTA Banner ── */
.cta-banner {
  background: var(--blue);
  color: white;
  padding: 60px 6%;
  text-align: center;
}
.cta-banner h2 { color: white; margin-bottom: 12px; }
.cta-banner p { color: #bfdbfe; margin-bottom: 28px; font-size: 18px; }
.cta-banner .btn { background: var(--accent); color: #111; margin: 0 8px; }
.cta-banner .btn.outline { background: transparent; color: white; border-color: white; }

/* ── Footer ── */
footer {
  padding: 40px 6%;
  background: #0b1220;
  color: #cbd5e1;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
}
.footer-brand .logo { display: block; margin-bottom: 0; }
.footer-brand .logo img { height: 100px; width: auto; opacity: .92; }
.footer-brand p { color: #9ca3af; font-size: 14px; margin: 0; }
footer h4 { color: white; margin: 0 0 12px; font-size: 15px; }
footer ul { list-style: none; padding: 0; margin: 0; }
footer ul li { margin-bottom: 8px; }
footer ul li a { color: #9ca3af; text-decoration: none; font-size: 14px; }
footer ul li a:hover { color: white; }
.footer-bottom {
  padding: 16px 6%;
  background: #0b1220;
  border-top: 1px solid #1f2937;
  color: #6b7280;
  font-size: 13px;
  text-align: center;
}

/* ── Mobile Nav ── */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--dark);
  border-radius: 2px;
  transition: .3s;
}
.mobile-nav {
  display: none;
  position: sticky;
  top: 144px;
  z-index: 99;
  background: white;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 16px rgba(0,0,0,.08);
  flex-direction: column;
  padding: 8px 6%;
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  color: var(--dark);
  font-size: 16px;
  font-weight: 500;
}
.mobile-nav a:last-child { border-bottom: none; }
.mobile-nav .mobile-cta {
  margin: 10px 0 6px;
  background: var(--accent);
  color: #111;
  padding: 13px;
  border-radius: 8px;
  text-align: center;
  font-weight: 700;
  border: none !important;
}
.mobile-nav .lang-switch-mobile {
  color: var(--blue) !important;
  font-size: 14px !important;
  font-weight: 600 !important;
  letter-spacing: .04em;
}

/* ── Responsive ── */
@media (max-width: 960px) {
  header { height: 144px; }
  .logo img { height: 124px; }
  .footer-brand .logo img { height: 20px; }
  .nav-cta { display: none; }
  .lang-switch { display: none; }
  nav { display: none; }
  .nav-toggle { display: flex; }
  .cards, .gallery, .steps, .why-grid { grid-template-columns: 1fr 1fr; }
  .cards-2col { grid-template-columns: repeat(2, 1fr) !important; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  footer { grid-template-columns: 1fr; gap: 24px; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  header { height: 124px; padding: 0 5%; }
  .logo img { height: 108px; }
  .mobile-nav { top: 124px; padding: 8px 5%; }
  .cards, .gallery, .steps, .why-grid { grid-template-columns: 1fr; }
  .cards-2col { grid-template-columns: 1fr !important; }
  .rfq-form { grid-template-columns: 1fr; }
  .rfq-form .full { grid-column: span 1; }
  h2 { font-size: 24px; }
  .page-hero { padding: 32px 5% 28px; }
  .page-hero h1 { font-size: 24px; }
  .page-hero p { font-size: 15px; }
  section { padding: 44px 5%; }
  .cta-banner { padding: 44px 5%; }
  .cta-banner p { font-size: 16px; margin-bottom: 20px; }
  .cta-banner .btn { display: block; margin: 0 0 12px; width: 100%; text-align: center; box-sizing: border-box; }
  .footer-brand .logo img { height: 100px; }
  .spec-table th, .spec-table td { padding: 10px 10px; font-size: 13px; }
}