/* =============================================
   基礎樣式 — 重設、排版、通用元素
   ============================================= */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  max-width: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  max-width: 100%;
  overflow-wrap: anywhere;
  -webkit-font-smoothing: antialiased;
}

img,
svg,
video,
canvas,
iframe {
  display: block;
  max-width: 100%;
  height: auto;
}

/* Flex/Grid children must be allowed to shrink below intrinsic content width */
:where(
  .container > *,
  .header-inner > *,
  .section-header--row > *,
  .hero-inner > *,
  .products-layout > *,
  .product-detail > *,
  .product-detail-body > *,
  .contact-layout > *,
  .contact-form-layout > *,
  .about-page-content > *,
  [class*="-grid"] > *,
  [class*="-row"] > *,
  [class*="-layout"] > *,
  [class*="-cols"] > *
) {
  min-width: 0;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

h1, h2, h3, h4 {
  line-height: 1.25;
  font-weight: 700;
  color: var(--color-primary-dark);
  letter-spacing: -0.01em;
  text-wrap: balance;
}

p {
  color: var(--color-text-muted);
}

/* ---------- Typography: language-aware wrapping ---------- */
/* Keep CJK line-break rules, but allow wrapping when fallback fonts are wider */
html[lang="zh-Hant"] body,
html[lang="zh-Hant"] p,
html[lang="zh-Hant"] li,
html[lang="zh-Hant"] td,
html[lang="zh-Hant"] th,
html[lang="zh-Hant"] dd,
html[lang="zh-Hant"] figcaption,
html[lang="zh-Hant"] label,
html[lang="zh-Hant"] h1,
html[lang="zh-Hant"] h2,
html[lang="zh-Hant"] h3,
html[lang="zh-Hant"] h4,
html[lang="zh-Hant"] button,
html[lang="zh-Hant"] a,
html[lang="zh-Hant"] span {
  word-break: normal;
  overflow-wrap: anywhere;
  line-break: strict;
  hyphens: none;
}

html[lang="en"] body,
html[lang="en"] p,
html[lang="en"] li,
html[lang="en"] td,
html[lang="en"] th,
html[lang="en"] dd,
html[lang="en"] figcaption,
html[lang="en"] label,
html[lang="en"] h1,
html[lang="en"] h2,
html[lang="en"] h3,
html[lang="en"] h4,
html[lang="en"] button,
html[lang="en"] a,
html[lang="en"] span,
html[lang="en"] .home-hero-desc,
html[lang="en"] .home-product-card-desc,
html[lang="en"] .home-capability-desc,
html[lang="en"] .page-hero-desc,
html[lang="en"] .contact-form-desc,
html[lang="en"] .contact-cta-desc,
html[lang="en"] .quality-cta-desc,
html[lang="en"] .quality-section-desc,
html[lang="en"] .about-overview-text,
html[lang="en"] .about-overview-label,
html[lang="en"] .about-page-content p,
html[lang="en"] .cert-card-desc,
html[lang="en"] .cert-card-scope,
html[lang="en"] .cert-card-note,
html[lang="en"] .connector-apps-desc,
html[lang="en"] .connector-app-name,
html[lang="en"] .connector-app-name-zh,
html[lang="en"] .connector-app-name-en,
html[lang="en"] .heating-hero-desc,
html[lang="en"] .heating-block-text,
html[lang="en"] .heating-fir-card-text,
html[lang="en"] .heating-feature-card-text,
html[lang="en"] .heating-capability-card-text,
html[lang="en"] .heating-hero-patent-note {
  word-break: normal;
  overflow-wrap: anywhere;
  hyphens: manual;
  text-wrap: pretty;
}

html[lang="en"] h1,
html[lang="en"] h2,
html[lang="en"] h3,
html[lang="en"] h4,
html[lang="en"] .home-product-card-title,
html[lang="en"] .home-capability-title,
html[lang="en"] .about-overview-label,
html[lang="en"] .cert-card-title,
html[lang="en"] .connector-app-name,
html[lang="en"] .connector-app-name-zh,
html[lang="en"] .connector-app-name-en,
html[lang="en"] .heating-fir-card-title,
html[lang="en"] .heating-feature-card-title {
  text-wrap: balance;
  hyphens: manual;
}

.nowrap {
  white-space: nowrap;
}

.section-link,
.heating-patent-link,
.cert-card-link,
.home-product-card-link {
  white-space: nowrap;
}

/* Mobile: allow wrap instead of clipping / forcing horizontal overflow */
@media (max-width: 768px) {
  .nowrap,
  .section-link,
  .heating-patent-link,
  .cert-card-link,
  .home-product-card-link {
    white-space: normal;
  }

  .btn {
    white-space: normal;
    height: auto;
    max-width: 100%;
    text-align: center;
  }

  .logo-text {
    white-space: normal;
  }
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section {
  padding-block: var(--space-4xl);
}

.section-eyebrow {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary-light);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
}

.section-header {
  max-width: 560px;
  margin-bottom: var(--space-3xl);
}

.section-header--row {
  max-width: none;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-xl);
  flex-wrap: wrap;
}

.section-title {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-md);
}

.section-desc {
  font-size: var(--text-lg);
  line-height: 1.75;
  max-width: 520px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}