:root {
  --ink: #40545b;
  --heading: #30464d;
  --accent: #6a9da0;
  --button: #74a8a5;
  --muted: #74858a;
  --paper: #ffffff;
  --pale: #f0f8f6;
  --pale-blue: #e4f2ef;
  --line: #dce7e6;
  --shell: min(1120px, calc(100% - 56px));
  font-family: Arial, "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  color: var(--ink);
  background: var(--paper);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; line-height: 1.75; background: var(--paper); }
a { color: inherit; }
.section-shell { width: var(--shell); margin: 0 auto; }

.site-header {
  height: 86px;
  width: var(--shell);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}
.brand { color: var(--heading); text-decoration: none; }
.brand strong, .brand small { display: block; }
.brand strong { font-size: 18px; letter-spacing: 2px; }
.brand small { color: var(--muted); font-size: 8px; letter-spacing: 1.2px; }
.site-nav { display: flex; align-items: center; gap: 30px; }
.site-nav a, .text-link { color: var(--ink); text-decoration: none; font-size: 14px; }
.site-nav a .en, .button .en, .text-link .en { display: block; margin-top: -4px; color: var(--muted); font-size: 9px; letter-spacing: .8px; line-height: 1.2; }
.site-nav a:hover, .text-link:hover { color: var(--accent); }
.nav-cta, .button { padding: 8px 16px !important; border: 1px solid var(--accent); }
.nav-cta { color: var(--accent) !important; }
.nav-cta span, .button span, .text-link span { margin-left: 8px; }
.nav-toggle { display: none; }

.eyebrow {
  margin: 0 0 20px;
  color: var(--accent);
  font-size: 10px;
  font-weight: bold;
  letter-spacing: 1.7px;
}
.hero {
  min-height: 560px;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 70px;
  align-items: center;
  padding: 72px 0 92px;
}
.hero h1, .page-hero h1 {
  margin: 0 0 24px;
  color: var(--heading);
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -1px;
}
.hero h1 em, .page-hero h1 em, .contact h2 em, .split-grid h2 span {
  color: var(--accent);
  font-style: normal;
}
.bilingual-title { display: flex; flex-wrap: wrap; align-items: baseline; gap: 12px 18px; }
.bilingual-title .en { color: var(--muted); font-size: .42em; font-weight: 400; letter-spacing: .5px; line-height: 1.4; }
.dual-copy { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.dual-copy > * { margin: 0; }
.dual-copy .en { color: var(--muted); font-size: .92em; }
.product-card .dual-copy { display: block; }
.product-card .dual-copy .en { margin-top: 4px; }
.bilingual-line { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 14px; }
.bilingual-line .en { color: var(--muted); font-size: .78em; letter-spacing: .3px; }
.hero-intro, .page-hero p:last-child { max-width: 475px; color: var(--muted); font-size: 15px; }
.hero-actions { display: flex; align-items: center; gap: 24px; margin-top: 30px; }
.button { display: inline-block; text-decoration: none; }
.button-primary { color: #fff; background: var(--button); border-color: var(--button); }
.button-light { color: var(--heading); background: #fff; }
.text-link { padding-bottom: 2px; border-bottom: 1px solid var(--accent); }

.material-visual {
  position: relative;
  height: 390px;
  overflow: hidden;
  border: 1px solid #cfe2df;
  background: #edf7f5;
}
.material-visual::before { content: ""; position: absolute; inset: 25px; border: 1px solid #bfd8d4; }
.material-visual::after { content: ""; position: absolute; right: 0; bottom: 0; left: 0; height: 70px; background: #8ebbb7; opacity: .9; }
.hero-product-photo { display: block; width: 100%; height: 100%; object-fit: cover; filter: saturate(.75); }
.visual-caption { position: absolute; z-index: 1; bottom: 18px; left: 25px; color: #fff; font-size: 12px; letter-spacing: 1px; }

.intro-band, .map-note {
  padding: 75px 0;
  background: var(--pale);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.split-grid { display: grid; grid-template-columns: 1fr 2fr; gap: 50px; }
.split-grid h2, .section-heading h2, .quality h2, .contact h2 {
  margin: 0 0 20px;
  color: var(--heading);
  font-size: clamp(30px, 3.7vw, 46px);
  font-weight: 600;
  line-height: 1.4;
}
.split-grid p:not(.eyebrow), .quality-panel p:not(.eyebrow), .contact-note { max-width: 620px; color: var(--muted); }

.products { padding: 88px 0; }
.section-heading { display: flex; align-items: end; justify-content: space-between; margin-bottom: 34px; }
.section-heading h2 { font-size: 34px; }
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.product-grid-large { grid-template-columns: repeat(3, 1fr); }
.product-card {
  min-height: 315px;
  display: flex;
  flex-direction: column;
  padding: 21px;
  border: 1px solid var(--line);
  background: #fff;
}
.product-code { color: var(--muted); font-size: 10px; letter-spacing: 1.2px; }
.product-image { display: block; width: 100%; height: 112px; object-fit: cover; margin: 18px 0 20px; border: 1px solid #c9d1cf; }
.product-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 18px 0 20px; }
.product-pair .product-image { height: 112px; margin: 0; }
.product-white { background: #fff; }
.product-gray { background: #f1f5f3; }
.product-dark { color: var(--heading); background: #e7f1ef; }
.product-dark .product-code, .product-dark p { color: #668087; }
.product-card h3 { margin: 0; color: var(--heading); font-size: 19px; font-weight: 600; }
.product-card p { margin: 7px 0 14px; color: var(--muted); font-size: 13px; line-height: 1.65; }
.product-card a { margin-top: auto; color: var(--accent); font-size: 13px; text-decoration: none; }

.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 42px; }
.feature-card { padding: 24px; border-top: 2px solid var(--accent); background: #f8fbfa; }
.feature-icon { width: 34px; height: 34px; margin-bottom: 16px; color: var(--accent); }
.feature-icon svg { display: block; width: 100%; height: 100%; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.5; }
.feature-card h3 { margin: 0 0 9px; color: var(--heading); font-size: 18px; font-weight: 600; }
.feature-card h3 .en { display: block; margin-top: 3px; color: var(--muted); font-size: 10px; font-weight: 400; letter-spacing: .7px; }
.feature-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.image-strip { display: grid; grid-template-columns: 1.35fr 1fr 1fr; gap: 14px; margin-top: 46px; }
.image-strip figure { margin: 0; }
.image-strip img { display: block; width: 100%; height: 190px; object-fit: cover; border: 1px solid var(--line); }
.image-strip figcaption { display: flex; justify-content: space-between; gap: 10px; padding-top: 9px; color: var(--muted); font-size: 11px; }
.image-strip figcaption .en { color: var(--accent); font-size: 9px; letter-spacing: .5px; }
.contact-item { display: grid; grid-template-columns: 26px 1fr; gap: 10px; align-items: start; }
.contact-item + .contact-item { margin-top: 16px; }
.contact-icon { width: 21px; height: 21px; color: var(--accent); }
.contact-icon svg { display: block; width: 100%; height: 100%; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.5; }

.quality {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  min-height: 370px;
  color: var(--heading);
  background: var(--pale-blue);
}
.quality-panel { padding: 60px; }
.quality-panel p:not(.eyebrow) { color: #668087; }
.quality-stats { display: grid; grid-template-columns: 1fr; align-content: center; padding: 40px 60px; background: #d2e9e5; }
.quality-stats div { display: flex; justify-content: space-between; padding: 17px 0; border-bottom: 1px solid #b4d3cf; }
.quality-stats strong { color: #527f82; font-size: 27px; font-weight: 500; }
.quality-stats span { color: #668087; font-size: 13px; }

.contact { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; padding: 95px 0; }
.contact-info { display: flex; flex-direction: column; align-items: flex-start; padding-top: 15px; }
.contact-info p, .contact-info a:not(.button) { margin: 0 0 12px; color: var(--muted); text-decoration: none; }
.contact-info strong { color: var(--heading); font-weight: 600; }
.contact-page { padding-top: 82px; padding-bottom: 92px; }
.contact-page h2 { font-size: 40px; }
.map-note h2 { margin: 0 0 10px; color: var(--heading); font-size: 34px; }

.page-hero { padding: 88px 0 78px; border-bottom: 1px solid var(--line); }
.history { display: grid; grid-template-columns: 1fr 2fr; gap: 50px; padding: 88px 0; }
.history h2 { margin: 0; color: var(--heading); font-size: 40px; font-weight: 600; }
.history-list { border-top: 1px solid var(--line); }
.history-list > div { display: grid; grid-template-columns: 82px minmax(0, 1fr) minmax(0, 1fr); gap: 20px; align-items: start; padding: 18px 0; border-bottom: 1px solid var(--line); }
.history-list strong { color: var(--accent); font-size: 24px; font-weight: 500; }
.history-list .history-en { color: #607276; font-size: 13px; line-height: 1.65; }
.history-list p { margin: 0; color: var(--muted); font-size: 14px; }

.site-footer { color: var(--muted); background: #eef6f4; border-top: 1px solid var(--line); font-size: 10px; letter-spacing: 1px; }
.site-footer .section-shell { display: flex; justify-content: space-between; padding: 20px 0; }

@media (max-width: 760px) {
  :root { --shell: min(100% - 36px, 1120px); }
  .site-header { height: 76px; }
  .nav-toggle { display: block; padding: 7px 12px; color: var(--accent); background: #fff; border: 1px solid var(--line); }
  .site-nav { position: absolute; z-index: 2; top: 70px; right: 18px; left: 18px; display: none; flex-direction: column; align-items: stretch; padding: 14px; background: #fff; border: 1px solid var(--line); }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 7px; }
  .hero { display: block; padding: 56px 0 70px; }
  .hero h1, .page-hero h1 { font-size: 43px; }
  .material-visual { height: 350px; margin-top: 48px; }
  .split-grid, .contact, .quality { grid-template-columns: 1fr; gap: 20px; }
  .intro-band, .products, .contact { padding: 64px 0; }
  .section-heading { display: block; }
  .section-heading .text-link { display: inline-block; margin-top: 8px; }
  .section-heading h2 { font-size: 30px; }
  .product-grid, .product-grid-large { grid-template-columns: 1fr 1fr; }
  .product-card { min-height: 295px; padding: 15px; }
  .product-image, .product-pair .product-image { height: 92px; }
  .feature-grid, .image-strip { grid-template-columns: 1fr; gap: 12px; }
  .image-strip img { height: 170px; }
  .quality-panel { padding: 48px 28px; }
  .quality-stats { padding: 22px 28px; }
  .history { display: block; padding: 64px 0; }
  .history h2 { margin-bottom: 28px; font-size: 32px; }
  .history-list > div { grid-template-columns: 70px 1fr; gap: 12px; }
  .history-list .history-en, .history-list p { grid-column: 2; }
  .history-list p { margin-top: 4px; }
  .dual-copy { grid-template-columns: 1fr; gap: 6px; }
  .bilingual-title { display: block; }
  .bilingual-title .en { display: block; margin-top: 4px; font-size: .38em; }
  .contact-page { padding-top: 60px; padding-bottom: 64px; }
  .contact-page h2 { font-size: 30px; }
  .map-note { padding: 48px 0; }
  .site-footer .section-shell { display: block; }
  .site-footer span { display: block; margin: 4px 0; }
}