/* ========== CSS Variables ========== */
:root {
  --cream: #F5E6CC;
  --paper: #EDE0C8;
  --paper-dark: #D4C5A0;
  --brown: #6B3A2A;
  --brown-light: #8B6914;
  --red: #C41E3A;
  --red-dark: #8B1A2B;
  --red-seal: #B22222;
  --ink: #2C1810;
  --ink-light: #5C4033;
  --gold: #C5A55A;
  --dark: #1A0F0A;
  --green: #2F4F2F;
  --shadow: 0 4px 20px rgba(0,0,0,0.15);
  --shadow-light: 0 2px 8px rgba(0,0,0,0.08);
  --font-heading: 'Noto Serif SC', 'STSong', 'SimSun', 'Songti SC', Georgia, serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  color: var(--ink);
  background-color: var(--cream);
  line-height: 1.8;
  min-height: 100vh;
  background-image:
    radial-gradient(ellipse at 20% 50%, rgba(197, 165, 90, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(107, 58, 42, 0.05) 0%, transparent 50%);
}

/* ========== Typography ========== */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--ink);
  line-height: 1.4;
}

h1 { font-size: 2.5rem; font-weight: 700; }
h2 { font-size: 1.8rem; font-weight: 600; }
h3 { font-size: 1.3rem; font-weight: 600; }

/* ========== Navigation ========== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(245, 230, 204, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(139, 105, 20, 0.2);
  padding: 0 2rem;
  transition: all 0.3s ease;
}

.nav.scrolled {
  box-shadow: var(--shadow-light);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--brown);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  letter-spacing: 0.05em;
}

.nav-logo .seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 2px solid var(--red-seal);
  color: var(--red-seal);
  font-size: 0.9rem;
  transform: rotate(-5deg);
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-heading);
  color: var(--ink-light);
  text-decoration: none;
  font-size: 0.95rem;
  position: relative;
  padding: 0.3rem 0;
  transition: color 0.3s;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--red);
  transition: width 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--brown);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

/* Mobile nav */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--brown);
  transition: all 0.3s;
}

/* ========== Page Header ========== */
.page-header {
  padding-top: 100px;
  padding-bottom: 3rem;
  text-align: center;
}

.page-header h1 {
  font-size: 2.8rem;
  margin-bottom: 1rem;
}

.page-header .subtitle {
  font-family: var(--font-heading);
  color: var(--ink-light);
  font-size: 1.1rem;
}

/* Decorative divider */
.divider {
  width: 60px;
  height: 3px;
  background: var(--red);
  margin: 1.5rem auto;
  position: relative;
}

.divider::before {
  content: '◆';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--red);
  font-size: 0.5rem;
  background: var(--cream);
  padding: 0 8px;
}

/* ========== Seal / Stamp ========== */
.seal-stamp {
  display: inline-block;
  border: 3px solid var(--red-seal);
  color: var(--red-seal);
  padding: 0.5rem 0.8rem;
  font-family: var(--font-heading);
  font-weight: 700;
  transform: rotate(-8deg);
  opacity: 0.85;
  position: relative;
}

.seal-stamp::after {
  content: '';
  position: absolute;
  inset: -3px;
  border: 1px solid var(--red-seal);
  opacity: 0.3;
}

/* ========== Buttons ========== */
.btn {
  display: inline-block;
  padding: 0.75rem 2rem;
  font-family: var(--font-heading);
  font-size: 1rem;
  border: 2px solid var(--brown);
  background: transparent;
  color: var(--brown);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s;
  letter-spacing: 0.05em;
}

.btn:hover {
  background: var(--brown);
  color: var(--cream);
}

.btn-primary {
  background: var(--red);
  border-color: var(--red);
  color: #fff;
}

.btn-primary:hover {
  background: var(--red-dark);
  border-color: var(--red-dark);
  color: #fff;
}

/* ========== Card ========== */
.card {
  background: rgba(255,252,245,0.9);
  border: 1px solid var(--paper-dark);
  padding: 2rem;
  border-radius: 4px;
  box-shadow: var(--shadow-light);
  transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

/* ========== Footer ========== */
.footer {
  text-align: center;
  padding: 3rem 2rem;
  border-top: 1px solid rgba(139, 105, 20, 0.2);
  margin-top: 4rem;
}

.footer p {
  color: var(--ink-light);
  font-size: 0.9rem;
}

.footer .quote {
  font-family: var(--font-heading);
  font-style: italic;
  color: var(--brown);
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

/* ========== Animation ========== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes drawLine {
  from { stroke-dashoffset: var(--line-length); }
  to { stroke-dashoffset: 0; }
}

@keyframes sealAppear {
  from { opacity: 0; transform: rotate(-8deg) scale(0.5); }
  to { opacity: 0.85; transform: rotate(-8deg) scale(1); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.fade-in-up {
  animation: fadeInUp 0.8s ease forwards;
}

.fade-in-up-delay-1 { animation-delay: 0.2s; opacity: 0; }
.fade-in-up-delay-2 { animation-delay: 0.4s; opacity: 0; }
.fade-in-up-delay-3 { animation-delay: 0.6s; opacity: 0; }

/* ========== Responsive ========== */
@media (max-width: 768px) {
  html { font-size: 14px; }

  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(245, 230, 204, 0.98);
    flex-direction: column;
    padding: 1.5rem 2rem;
    gap: 1rem;
    border-bottom: 1px solid var(--paper-dark);
    transform: translateY(-100%);
    opacity: 0;
    transition: all 0.3s;
    pointer-events: none;
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-toggle {
    display: flex;
  }

  .page-header h1 { font-size: 2rem; }
}