:root {
  --ink: #1c1914;
  --ink-soft: #4a453c;
  --paper: #f4efe6;
  --paper-deep: #ebe4d6;
  --line: #d4ccbc;
  --bronze: #8a6a3b;
  --bronze-deep: #6e532c;
  --banner: #2a261f;
  --serif: "Source Serif 4", "Noto Serif TC", "Songti TC", serif;
  --sans: "Source Sans 3", "Noto Sans TC", "PingFang TC", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.125rem;
  line-height: 1.7;
  min-height: 100vh;
}


.site-header {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.1rem 6vw;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(244, 239, 230, 0.92);
  backdrop-filter: blur(10px);
  z-index: 10;
}

.wordmark {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  line-height: 1.1;
  min-width: 6.5rem;
}

.wordmark-en {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: 0.04em;
}

.wordmark-zh {
  font-family: var(--serif);
  font-size: 0.8rem;
  color: var(--bronze-deep);
  letter-spacing: 0.28em;
  margin-top: 0.15rem;
}

.site-nav {
  display: flex;
  gap: 1.4rem;
  margin-left: auto;
}

.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.95rem;
  border-bottom: 1px solid transparent;
  padding-bottom: 0.1rem;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--bronze);
}

.lang-switch {
  display: flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
}

.lang-btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--ink-soft);
  font: 500 0.75rem/1 var(--sans);
  letter-spacing: 0.08em;
  padding: 0.35rem 0.7rem;
  cursor: pointer;
}

.lang-btn.is-active {
  background: var(--ink);
  color: var(--paper);
}

.hero {
  padding: clamp(5rem, 14vh, 8rem) 6vw clamp(4rem, 12vh, 6.5rem);
  max-width: 46rem;
  margin: 0 auto;
  text-align: left;
}

.eyebrow {
  margin: 0 0 1.2rem;
  letter-spacing: 0.08em;
  font-size: 0.9rem;
  color: var(--bronze-deep);
}

.hero h1 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(2rem, 5.2vw, 3.35rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

html[lang="zh-HK"] .hero h1,
html[lang="zh"] .hero h1 {
  word-break: keep-all;
  line-break: strict;
  letter-spacing: 0.04em;
}

.hero-lead {
  margin: 1.4rem 0 0;
  font-size: 1.2rem;
  color: var(--ink-soft);
  max-width: 38rem;
}

.section {
  padding: 3.6rem 6vw;
  max-width: 64rem;
  margin: 0 auto;
  border-top: 1px solid var(--line);
}

.section h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(1.6rem, 3vw, 2rem);
  margin: 0 0 0.9rem;
  letter-spacing: -0.01em;
}

.intro {
  color: var(--ink-soft);
  max-width: 38rem;
  margin: 0 0 2rem;
}

.audience {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.audience li {
  background: var(--paper-deep);
  border-radius: 1rem;
  padding: 1.4rem 1.3rem 1.5rem;
}

.audience h3 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.25rem;
  margin: 0 0 0.55rem;
}

.audience p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.02rem;
}

#products,
#contact {
  max-width: 46rem;
  margin-left: auto;
  margin-right: auto;
  width: 100%;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 2rem 6vw 2.6rem;
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.site-footer p { margin: 0.2rem 0; }

@media (max-width: 800px) {
  .audience { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .site-header {
    flex-wrap: wrap;
    padding: 0.9rem 5vw;
    gap: 0.7rem 1rem;
  }
  .site-nav {
    order: 3;
    width: 100%;
    margin: 0;
    justify-content: flex-start;
    gap: 1rem;
  }
  .hero,
  .section {
    padding-left: 5vw;
    padding-right: 5vw;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}