/* ===========================================
   真冠科技 / 御試 — Shared Stylesheet
   =========================================== */

:root {
  /* Theme: 深藍金 (default) */
  --c-bg: #F7F3EA;
  --c-bg-elevated: #FFFFFF;
  --c-surface: #FBF8F1;
  --c-ink: #0F1E47;
  --c-ink-soft: #3A4566;
  --c-ink-mute: #6B7388;
  --c-line: #E5DECC;
  --c-line-strong: #D4CBB3;
  --c-gold: #C9A962;
  --c-gold-deep: #A8893F;
  --c-gold-soft: #E8D7A6;
  --c-navy: #0F1E47;
  --c-navy-deep: #07112B;
  --c-navy-soft: #1E2E5C;
  --c-success: #2D6A4F;

  --r-sm: 6px;
  --r-md: 12px;
  --r-lg: 20px;
  --r-pill: 999px;

  --shadow-sm: 0 1px 2px rgba(15, 30, 71, 0.04), 0 2px 6px rgba(15, 30, 71, 0.04);
  --shadow-md: 0 4px 12px rgba(15, 30, 71, 0.06), 0 12px 32px rgba(15, 30, 71, 0.06);
  --shadow-lg: 0 8px 24px rgba(15, 30, 71, 0.08), 0 24px 60px rgba(15, 30, 71, 0.10);

  --font-serif: "Noto Serif TC", "Songti TC", "PingFang TC", serif;
  --font-sans: "Noto Sans TC", "PingFang TC", "Helvetica Neue", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", ui-monospace, monospace;

  --container: 1200px;
  --container-narrow: 880px;
}

[data-theme="light"] {
  --c-bg: #FFFFFF;
  --c-bg-elevated: #FFFFFF;
  --c-surface: #F7F8FA;
  --c-line: #ECEEF2;
  --c-line-strong: #DDE0E8;
}

[data-theme="warm"] {
  --c-bg: #F1E9D9;
  --c-bg-elevated: #FAF3E2;
  --c-surface: #EFE5CF;
  --c-line: #DCCFAF;
  --c-line-strong: #C4B58F;
}

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

html, body {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--c-bg);
  color: var(--c-ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "palt";
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
}

/* Typography */
.serif { font-family: var(--font-serif); }
.mono { font-family: var(--font-mono); }

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0;
  line-height: 1.25;
  color: var(--c-navy);
}

h1 { font-size: clamp(40px, 5.5vw, 68px); letter-spacing: -0.02em; }
h2 { font-size: clamp(30px, 3.8vw, 44px); }
h3 { font-size: clamp(20px, 2vw, 24px); }

p { margin: 0; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-gold-deep);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--c-gold);
}

/* Layout */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 28px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--c-bg) 88%, transparent);
  backdrop-filter: saturate(150%) blur(14px);
  -webkit-backdrop-filter: saturate(150%) blur(14px);
  border-bottom: 1px solid color-mix(in oklab, var(--c-line) 70%, transparent);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand__mark {
  width: 38px;
  height: 38px;
  border-radius: 9px;
  object-fit: cover;
  box-shadow: 0 1px 0 rgba(15, 30, 71, 0.08);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand__zh {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 600;
  color: var(--c-navy);
  letter-spacing: 0.04em;
}

.brand__en {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--c-ink-mute);
  text-transform: uppercase;
  margin-top: 2px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav a {
  padding: 8px 14px;
  border-radius: var(--r-pill);
  font-size: 14px;
  color: var(--c-ink-soft);
  transition: all 0.18s ease;
}

.nav a:hover {
  color: var(--c-navy);
  background: color-mix(in oklab, var(--c-line) 50%, transparent);
}

.nav a.is-active {
  color: var(--c-navy);
  background: color-mix(in oklab, var(--c-gold) 18%, transparent);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  background: var(--c-navy);
  color: #FBF8F1;
  border-radius: var(--r-pill);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(15, 30, 71, 0.18);
}

.nav-cta__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-gold);
}

/* ===== Footer ===== */
.site-footer {
  margin-top: 96px;
  padding: 56px 0 36px;
  background: var(--c-navy-deep);
  color: rgba(255, 255, 255, 0.72);
  font-size: 13.5px;
}

.site-footer__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

.site-footer__top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 36px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-footer__brand {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.site-footer__brand .brand__zh,
.site-footer__brand .brand__en {
  color: rgba(255, 255, 255, 0.92);
}

.site-footer__brand .brand__en { color: var(--c-gold); }

.site-footer__tag {
  font-family: var(--font-serif);
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  max-width: 280px;
  line-height: 1.7;
}

.site-footer h4 {
  color: rgba(255, 255, 255, 0.95);
  font-size: 13px;
  font-family: var(--font-sans);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.site-footer a:hover {
  color: var(--c-gold);
}

.site-footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
  letter-spacing: 0.04em;
}

@media (max-width: 760px) {
  .site-footer__top {
    grid-template-columns: 1fr 1fr;
  }
  .site-footer__bottom {
    flex-direction: column;
    gap: 10px;
    align-items: flex-start;
  }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-primary {
  background: var(--c-navy);
  color: #FBF8F1;
}

.btn-primary:hover {
  background: var(--c-navy-soft);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-ghost {
  background: transparent;
  color: var(--c-navy);
  border-color: var(--c-line-strong);
}

.btn-ghost:hover {
  border-color: var(--c-navy);
  background: var(--c-bg-elevated);
}

.btn-gold {
  background: linear-gradient(180deg, #DCBB72 0%, #C9A962 100%);
  color: var(--c-navy-deep);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.45) inset, 0 8px 20px rgba(168, 137, 63, 0.28);
}

.btn-gold:hover {
  transform: translateY(-1px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.55) inset, 0 12px 28px rgba(168, 137, 63, 0.36);
}

.store-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 12px 22px 12px 18px;
  background: var(--c-navy);
  color: #FBF8F1;
  border-radius: 14px;
  transition: transform 0.2s ease, background 0.2s ease;
}

.store-btn:hover {
  transform: translateY(-2px);
  background: var(--c-navy-soft);
}

.store-btn__icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.store-btn__label {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.store-btn__label small {
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  opacity: 0.7;
}

.store-btn__label strong {
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.02em;
  margin-top: 3px;
}

/* ===== Page chrome ===== */
main {
  min-height: 60vh;
}

.section {
  padding: 96px 0;
}

.section-tight {
  padding: 72px 0;
}

/* ===== Decorative ===== */
.divider-gold {
  display: block;
  width: 40px;
  height: 1px;
  background: var(--c-gold);
  margin: 24px 0;
}