/* ===== Design tokens — 老香港懷舊風（柔和暖調） ===== */
:root {
  --color-primary: #b5485a;
  --color-primary-dark: #944a58;
  --color-primary-light: #c96a7a;
  --color-accent: #c9a86c;
  --color-jade: #4a7c66;
  --color-neon-green: #6aab8a;
  --color-bg: #faf7f0;
  --color-bg-alt: #f3ece2;
  --color-bg-dark: #2e2624;
  --color-text: #453a32;
  --color-text-muted: #786a5e;
  --color-border: #ddd2c2;
  --color-gold: #c9a86c;
  --color-primary-rgb: 181, 72, 90;
  --color-gold-rgb: 201, 168, 108;
  --color-jade-rgb: 74, 124, 102;
  --color-ink-rgb: 69, 58, 50;
  --font-sans: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  --font-serif: "Noto Serif TC", "Songti TC", "PMingLiU", serif;
  --shadow-sm: 0 1px 2px rgba(var(--color-ink-rgb), 0.06);
  --shadow-md: 0 4px 6px -1px rgba(var(--color-ink-rgb), 0.08), 0 2px 4px -2px rgba(var(--color-ink-rgb), 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(var(--color-ink-rgb), 0.09), 0 4px 6px -4px rgba(var(--color-ink-rgb), 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(var(--color-ink-rgb), 0.1), 0 8px 10px -6px rgba(var(--color-ink-rgb), 0.06);
  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --container-max: 72rem;
  --header-height: 4.5rem;
  --transition: 0.2s ease;
}

/* ===== Reset & base ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-dark);
}

ul {
  list-style: none;
}

/* ===== Layout ===== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

@media (min-width: 768px) {
  .container {
    padding-inline: 2rem;
  }
}

.section {
  padding-block: 4.5rem;
}

@media (min-width: 768px) {
  .section {
    padding-block: 6rem;
  }
}

.section--alt {
  background-color: var(--color-bg-alt);
}

.section__label {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: #fff;
  background: var(--color-primary);
  padding: 0.35rem 1.125rem;
  border: 2px solid var(--color-gold);
  box-shadow: 3px 3px 0 rgba(var(--color-ink-rgb), 0.12);
  margin-bottom: 0.875rem;
}

.section__title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-text);
  margin-bottom: 1rem;
}

.section__desc {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 40rem;
}

.section__header {
  text-align: center;
  margin-bottom: 3rem;
}

.section__header .section__desc {
  margin-inline: auto;
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(250, 247, 240, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.site-header.is-scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-text);
  text-decoration: none;
}

.logo:hover {
  color: var(--color-text);
}

.logo__icon {
  width: 2.25rem;
  height: 2.25rem;
  background: var(--color-primary);
  border: 2px solid var(--color-gold);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1rem;
  box-shadow: 2px 2px 0 rgba(var(--color-ink-rgb), 0.15);
}

.logo__text-en {
  display: block;
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

.nav {
  display: none;
  align-items: center;
  gap: 2rem;
}

@media (min-width: 768px) {
  .nav {
    display: flex;
  }
}

.nav__link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition);
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--color-primary);
}

.nav__cta {
  display: none;
}

@media (min-width: 768px) {
  .nav__cta {
    display: inline-flex;
  }
}

/* Mobile menu toggle */
.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border: none;
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--color-text);
  font-size: 1.25rem;
}

@media (min-width: 768px) {
  .menu-toggle {
    display: none;
  }
}

.mobile-nav {
  position: fixed;
  inset: var(--header-height) 0 0 0;
  background: var(--color-bg);
  padding: 1.5rem;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  z-index: 999;
  overflow-y: auto;
}

.mobile-nav.is-open {
  transform: translateX(0);
}

.mobile-nav__link {
  display: block;
  padding: 0.875rem 0;
  font-size: 1.0625rem;
  font-weight: 500;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  text-decoration: none;
}

.mobile-nav__link:hover {
  color: var(--color-primary);
}

.mobile-nav__cta {
  margin-top: 1.5rem;
  width: 100%;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
  border: 2px solid var(--color-gold);
  box-shadow: 3px 3px 0 rgba(var(--color-ink-rgb), 0.15);
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--outline {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

.btn--outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(var(--color-primary-rgb), 0.06);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.35);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.25);
  color: #fff;
}

/* ===== Cards ===== */
.card {
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: 4px;
  padding: 1.75rem;
  box-shadow: 4px 4px 0 rgba(var(--color-ink-rgb), 0.07);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

.card:hover {
  box-shadow: 6px 6px 0 rgba(var(--color-primary-rgb), 0.1);
  transform: translateY(-3px);
  border-color: var(--color-gold);
}

.card__icon {
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(var(--color-primary-rgb), 0.07);
  border: 1px solid var(--color-gold);
  border-radius: 4px;
  color: var(--color-primary);
  font-size: 1.375rem;
  margin-bottom: 1.25rem;
}

.card__title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.card__text {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--color-bg-dark);
  color: #b8a48e;
  padding-block: 3.5rem 2rem;
  border-top: 4px solid var(--color-primary);
}

.site-footer a {
  color: #e8dcc8;
  text-decoration: none;
}

.site-footer a:hover {
  color: #fff;
}

.footer__grid {
  display: grid;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

@media (min-width: 768px) {
  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
  }
}

.footer__brand .logo {
  color: #fff;
  margin-bottom: 1rem;
}

.footer__brand .logo:hover {
  color: #fff;
}

.footer__brand p {
  font-size: 0.9375rem;
  line-height: 1.7;
  max-width: 22rem;
}

.footer__heading {
  font-size: 0.875rem;
  font-weight: 600;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 1.25rem;
}

.footer__links li + li {
  margin-top: 0.625rem;
}

.footer__links a {
  font-size: 0.9375rem;
}

.footer__bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(148, 163, 184, 0.2);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  font-size: 0.875rem;
}

@media (min-width: 768px) {
  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

/* ===== Legal pages shared ===== */
.legal-hero {
  padding-top: calc(var(--header-height) + 3rem);
  padding-bottom: 2.5rem;
  background: linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
}

.legal-hero__title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.legal-hero__meta {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.legal-content {
  padding-bottom: 4rem;
}

.legal-content .container {
  max-width: 48rem;
}

.legal-content h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

.legal-content h2:first-child {
  margin-top: 0;
}

.legal-content p,
.legal-content li {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.legal-content ul {
  list-style: disc;
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.legal-content li {
  margin-bottom: 0.5rem;
}

.legal-content a {
  word-break: break-all;
}

/* ===== Utility ===== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.main-offset {
  padding-top: var(--header-height);
}