/* Reset & base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; -webkit-text-size-adjust: 100%; }
body { font-family: 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', Arial, sans-serif; line-height: 1.6; color: #1D3557; background: #F8F9FA; }
a { color: #E63946; text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible { outline: 3px solid #F4A261; outline-offset: 2px; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

/* CSS Variables */
:root {
  --c-primary-red: #E63946;
  --c-primary-blue: #1D3557;
  --c-accent-gold: #F4A261;
  --c-bg-light: #F8F9FA;
  --c-bg-dark: #1A1A2E;
  --c-text-primary: #1D3557;
  --c-text-secondary: #6C757D;
  --c-text-light: #FFFFFF;
  --c-border: #DEE2E6;
  --c-success: #2A9D8F;
  --radius: 16px;
  --radius-sm: 8px;
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-hover: 0 8px 30px rgba(0,0,0,0.15);
  --transition: 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  --font-heading: 'Georgia', 'Times New Roman', serif;
  --font-heading-bold: 'Impact', 'Arial Black', sans-serif;
  --font-body: 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', Arial, sans-serif;
  --font-mono: 'Courier New', monospace;
}

/* Container */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* Skip link */
.skip-link { position: absolute; top: -100px; left: 0; z-index: 100; background: var(--c-primary-blue); color: var(--c-text-light); padding: 8px 16px; border-radius: 0 0 var(--radius-sm) 0; transition: top 0.3s; }
.skip-link:focus { top: 0; text-decoration: none; }

/* Header */
.header { position: fixed; top: 0; left: 0; width: 100%; z-index: 90; background: rgba(29,53,87,0.95); backdrop-filter: blur(12px); transition: background 0.3s, box-shadow 0.3s; }
.header--scrolled { background: rgba(255,255,255,0.85); box-shadow: 0 2px 12px rgba(0,0,0,0.1); }
.header--scrolled .header__brand { color: var(--c-primary-blue); }
.header--scrolled .nav__link { color: var(--c-primary-blue); }
.header--scrolled .header__cta { background: var(--c-primary-red); border-color: var(--c-primary-red); }
.header__inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.header__brand { font-family: var(--font-heading-bold); font-size: 1.5rem; color: #fff; text-decoration: none; letter-spacing: 0.05em; transition: color 0.3s; }
.header__brand:hover { color: var(--c-accent-gold); text-decoration: none; }

/* Navigation */
.nav { display: flex; align-items: center; }
.nav__list { display: flex; gap: 28px; }
.nav__link { font-family: var(--font-body); font-size: 0.95rem; color: #fff; padding: 6px 0; border-bottom: 2px solid transparent; transition: color 0.3s, border-color 0.3s; }
.nav__link:hover { color: var(--c-accent-gold); text-decoration: none; border-bottom-color: var(--c-accent-gold); }
.nav__link[aria-current="page"] { color: var(--c-accent-gold); border-bottom-color: var(--c-accent-gold); font-weight: 700; }

/* Nav toggle (hamburger) */
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; flex-direction: column; gap: 5px; width: 32px; }
.nav-toggle__bar { display: block; width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: transform 0.3s, opacity 0.3s; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.header--scrolled .nav-toggle__bar { background: var(--c-primary-blue); }

/* Header CTA button */
.header__cta { margin-left: 20px; }

/* Button */
.button { display: inline-flex; align-items: center; justify-content: center; padding: 10px 28px; border-radius: 50px; font-family: var(--font-body); font-size: 0.95rem; font-weight: 600; color: #fff; background: var(--c-primary-red); border: 2px solid var(--c-primary-red); cursor: pointer; transition: transform 0.2s, box-shadow 0.2s, background 0.3s, color 0.3s; text-decoration: none; }
.button:hover { transform: scale(1.04); box-shadow: 0 4px 14px rgba(230,57,70,0.4); text-decoration: none; }
.button:focus-visible { outline: 3px solid var(--c-accent-gold); outline-offset: 2px; }
.button--secondary { background: transparent; color: var(--c-primary-blue); border-color: var(--c-primary-blue); }
.button--secondary:hover { background: var(--c-primary-blue); color: #fff; }

/* Footer */
.footer { background: var(--c-bg-dark); color: var(--c-text-secondary); padding: 48px 0 32px; }
.footer__inner { display: grid; grid-template-columns: 1fr 1fr; gap: 32px 48px; }
.footer__brand { font-family: var(--font-heading-bold); font-size: 1.3rem; color: var(--c-text-light); letter-spacing: 0.05em; }
.footer__contact { display: flex; flex-direction: column; gap: 8px; }
.footer__contact-item { font-size: 0.9rem; color: var(--c-text-secondary); }
.footer__contact-item a { color: var(--c-accent-gold); text-decoration: none; }
.footer__contact-item a:hover { text-decoration: underline; }
.footer__links { display: flex; gap: 24px; align-items: flex-start; }
.footer__link { color: var(--c-accent-gold); font-size: 0.9rem; border-bottom: 1px solid transparent; transition: border-color 0.2s; }
.footer__link:hover { border-bottom-color: var(--c-accent-gold); text-decoration: none; }
.footer__note { grid-column: 1 / -1; font-size: 0.85rem; color: var(--c-text-secondary); font-style: italic; }
.footer__meta { grid-column: 1 / -1; display: flex; justify-content: space-between; align-items: center; border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px; font-size: 0.85rem; color: var(--c-text-secondary); }
.footer__copyright a { color: var(--c-text-secondary); }
.footer__icp { color: var(--c-text-secondary); }

/* Generic card */
.card { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 24px; transition: box-shadow 0.3s, transform 0.3s; }
.card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }

/* Section */
.section { padding: 80px 0; }

/* Utility for scroll reveal */
[data-animate] { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275); }
[data-animate].is-visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  [data-animate] { opacity: 1; transform: none; transition: none; }
  .button:hover { transform: none; }
  .card:hover { transform: none; }
}

/* Responsive */
@media (max-width: 768px) {
  .container { padding: 0 16px; }
  .header__inner { height: 56px; position: relative; }
  .nav-toggle { display: flex; }
  .nav { position: absolute; top: 100%; left: 0; width: 100%; background: rgba(29,53,87,0.98); backdrop-filter: blur(12px); flex-direction: column; padding: 16px 24px; transform: scaleY(0); transform-origin: top; opacity: 0; transition: transform 0.3s, opacity 0.3s; }
  .nav[data-open] { transform: scaleY(1); opacity: 1; }
  .header--scrolled .nav { background: rgba(255,255,255,0.98); }
  .nav__list { flex-direction: column; gap: 0; }
  .nav__link { display: block; padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,0.1); color: #fff; }
  .header--scrolled .nav__link { color: var(--c-primary-blue); border-bottom-color: rgba(29,53,87,0.1); }
  .header__cta { display: none; }
  .footer__inner { grid-template-columns: 1fr; gap: 24px; }
  .footer__links { justify-content: flex-start; }
  .footer__meta { flex-direction: column; gap: 8px; text-align: center; }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .header__inner { height: 60px; }
  .nav__list { gap: 20px; }
}

/* Responsive image container (placeholder for page images) */
.image-container { border-radius: var(--radius); overflow: hidden; background: var(--c-border); aspect-ratio: 16 / 9; display: flex; align-items: center; justify-content: center; color: var(--c-text-secondary); font-size: 0.9rem; }
.image-container--square { aspect-ratio: 1 / 1; }
.image-container--wide { aspect-ratio: 21 / 9; }