/* ============================================================
   子平真诠 ZIPING ZHENQUAN — 全局样式
   品牌调性：静·深·灵·拙·隐
   配色：靛蓝 #1B2838 / 玄纸白 #F7F4EF / 朱砂 #B5342E / 金 #C9A96E
   五色：水#1B2838 木#4A6741 火#8B2E2E 土#6B5B4A 金#C9A96E
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;1,300;1,400&family=Inter:wght@200;300;400;500&family=Noto+Serif+SC:wght@300;400;500;700&display=swap');

/* Performance: disable animations for users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

:root {
  --ink: #1A1A2E;
  --xuan-paper: #F7F4EF;
  --vermillion: #B5342E;
  --gold: #C9A96E;
  --water: #1B2838;
  --wood: #4A6741;
  --fire: #8B2E2E;
  --earth: #6B5B4A;
  --metal: #C9A96E;
  --faded-ink: #5C5C6E;
  --border-light: rgba(26,26,46,0.08);
  --font-display: 'Cormorant Garamond', 'Noto Serif SC', serif;
  --font-cn: 'Noto Serif SC', serif;
  --font-body: 'Inter', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--xuan-paper);
  color: var(--ink);
  font-weight: 300;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: var(--vermillion); color: var(--xuan-paper); }

/* ========== 导航栏 ========== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 24px 64px;
  display: flex; justify-content: space-between; align-items: center;
  background: linear-gradient(to bottom, rgba(247,244,239,0.97), rgba(247,244,239,0));
  transition: all 0.6s ease;
}

.site-header.scrolled {
  background: rgba(247,244,239,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 14px 64px;
  border-bottom: 1px solid var(--border-light);
}

.site-header .logo-link {
  text-decoration: none; color: var(--ink);
  display: flex; align-items: center; gap: 12px;
}

.site-header .logo-img {
  height: 48px;
  width: auto;
  transition: height 0.6s ease;
}

.site-header.scrolled .logo-img { height: 36px; }

.site-header .logo-text {
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.1em;
  font-weight: 400;
}

.site-nav {
  display: flex; gap: 32px; align-items: center;
}

.site-nav a {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--faded-ink);
  text-decoration: none;
  transition: color 0.3s;
  font-weight: 400;
}

.site-nav a:hover, .site-nav a.active { color: var(--vermillion); }

.site-nav .nav-cta {
  padding: 8px 20px;
  border: 1px solid var(--vermillion);
  color: var(--vermillion) !important;
  transition: all 0.3s;
}

.site-nav .nav-cta:hover {
  background: var(--vermillion);
  color: var(--xuan-paper) !important;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none; border: none;
  cursor: pointer; padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--ink);
  margin: 5px 0;
  transition: 0.3s;
}

/* ========== 通用区块 ========== */
.section { padding: 128px 64px; }

.section-label {
  font-family: var(--font-display);
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  letter-spacing: 0.16em;
  color: var(--ink);
  margin-bottom: 28px;
  font-weight: 400;
  text-align: center;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  font-weight: 400;
  letter-spacing: 0.12em;
  margin-bottom: 8px;
  color: var(--ink);
}

.section-header .sub {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 0.9rem;
  color: var(--faded-ink);
  letter-spacing: 0.06em;
}

.line {
  display: block;
  width: 40px; height: 1px;
  background: var(--vermillion);
  margin: 36px auto;
  opacity: 0.5;
}

/* ========== CTA 按钮 ========== */
.btn-primary {
  display: inline-block;
  padding: 14px 48px;
  background: var(--vermillion);
  color: var(--xuan-paper);
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.4s ease;
}

.btn-primary:hover {
  background: var(--ink);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(26,26,46,0.15);
}

.btn-outline {
  display: inline-block;
  padding: 14px 48px;
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--ink);
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.4s ease;
}

.btn-outline:hover {
  background: var(--ink);
  color: var(--xuan-paper);
  transform: translateY(-2px);
}

.btn-gold {
  background: var(--gold);
  color: var(--xuan-paper);
}

.btn-gold:hover { background: var(--ink); }

/* ========== 滚动动画 ========== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1),
              transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========== Footer ========== */
.site-footer {
  padding: 56px 64px;
  text-align: center;
  border-top: 1px solid var(--border-light);
}

.site-footer .links {
  display: flex; justify-content: center; gap: 28px;
  margin-bottom: 28px; flex-wrap: wrap;
}

.site-footer .links a {
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--faded-ink);
  text-decoration: none;
  transition: color 0.3s;
}

.site-footer .links a:hover { color: var(--vermillion); }

.site-footer .brand {
  font-family: var(--font-display);
  font-size: 0.6rem;
  color: var(--faded-ink);
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}

.site-footer .copy {
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  color: var(--ink);
  font-weight: 400;
  opacity: 0.92;
  line-height: 1.7;
}

.dpo {
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--ink);
  font-weight: 500;
  opacity: 0.85;
  line-height: 1.7;
}

.site-footer .social-links {
  display: flex; justify-content: center; gap: 20px;
  margin-bottom: 24px;
}

.site-footer .social-links a {
  font-size: 1.1rem;
  color: var(--faded-ink);
  text-decoration: none;
  transition: color 0.3s, transform 0.3s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: rgba(26,26,46,0.03);
}

.site-footer .social-links a:hover {
  color: var(--vermillion);
  transform: translateY(-2px);
  background: rgba(26,26,46,0.06);
}

/* ========== 响应式 ========== */

/* PWA standalone mode: add safe-area padding */
@media (display-mode: standalone) {
  .site-header { padding-top: calc(18px + env(safe-area-inset-top)); }
  .site-footer { padding-bottom: calc(56px + env(safe-area-inset-bottom)); }
}

@media (max-width: 900px) {
  .site-header { padding: 18px 24px; }
  .site-header.scrolled { padding: 12px 24px; }
  .site-nav { display: none; }
  .site-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute; top: 100%; left: 0; right: 0;
    background: rgba(247,244,239,0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 32px 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border-light);
    animation: slideDown 0.25s ease;
  }
  @keyframes slideDown { from { opacity:0; transform:translateY(-8px); } to { opacity:1; transform:translateY(0); } }
  .nav-toggle { display: block; z-index: 101; }
  .nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  .nav-toggle.open span:nth-child(2) { opacity: 0; }
  .nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
  .section { padding: 80px 24px; }

  /* Mobile header auth */
  .header-auth { margin-left: auto; margin-right: 12px; }
  .header-auth .user-email { max-width: 100px; font-size: 0.6rem; }

  /* Site nav links larger for touch */
  .site-nav a { font-size: 0.78rem; padding: 8px 0; }
}

@media (max-width: 500px) {
  .site-header .logo-text { font-size: 0.9rem; }
  .site-header .logo-img { height: 36px; }
  .site-header.scrolled .logo-img { height: 28px; }
  .section { padding: 56px 20px; }
  .section-label { font-size: 0.9rem; }
  .section-header h2 { font-size: 1rem; }
  .section-header .sub { font-size: 0.78rem; }
  .btn-primary, .btn-outline { padding: 12px 28px; font-size: 0.68rem; width: 100%; text-align: center; }

  /* Footer mobile */
  .site-footer { padding: 40px 20px; }
  .site-footer .links { gap: 16px; }
  .site-footer .links a { font-size: 0.6rem; }
  .site-footer .copy, .site-footer .dpo { font-size: 0.8rem !important; font-weight: 400; line-height: 1.7; }

  /* Touch targets & iOS zoom fix */
  a, button, .btn-primary, .btn-outline, input, select { min-height: 44px; }
  input, select { font-size: 16px !important; }

  /* Prevent horizontal overflow */
  body { overflow-x: hidden; }
  img { max-width: 100%; height: auto; }
  table { display: block; overflow-x: auto; }

}

/* ===== 语言切换按钮 ===== */
.lang-switch {
  padding: 6px 14px;
  border: 1px solid var(--border-light);
  background: transparent;
  font-family: var(--font-body);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: var(--faded-ink);
  cursor: pointer;
  transition: all 0.3s;
  margin-left: 12px;
}
.lang-switch:hover {
  border-color: var(--gold);
  color: var(--gold);
}