/* === Reset & Variables === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg-cream: #FDF5E6;
  --bg-dark: #2C1E16;
  --accent-orange: #E85D3A;
  --kiwi-green: #8BC34A;
  --kiwi-yellow: #FFEB3B;
  --tech-blue: #2196F3;
  --glass-white: rgba(255,255,255,0.75);
  --text-dark: #2C1E16;
  --text-soft: #5A4A3A;
  --font-heading: Georgia, 'Times New Roman', serif;
  --font-subheading: Georgia, 'Times New Roman', serif;
  --font-body: Helvetica, Arial, sans-serif;
  --font-caption: Helvetica, Arial, sans-serif;
  --max-width: 1200px;
  --header-h: 72px;
  --space-lg: 8rem;
  --space-md: 4rem;
  --space-sm: 2rem;
  --space-xs: 1rem;
  --transition: 0.3s ease;
}
html { scroll-behavior: smooth; font-size: 16px; line-height: 1.6; }
body {
  background: var(--bg-cream);
  color: var(--text-dark);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: var(--accent-orange); text-decoration: none; transition: color var(--transition); }
a:hover, a:focus-visible { color: var(--text-dark); }
:focus-visible { outline: 3px solid var(--tech-blue); outline-offset: 2px; }
::selection { background: var(--kiwi-green); color: var(--bg-cream); }
img { max-width: 100%; display: block; height: auto; }

/* === Container === */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--space-sm); }

/* === Skip Link === */
.skip-link {
  position: absolute; top: -1000px; left: 0; z-index: 1000;
  background: var(--text-dark); color: var(--bg-cream); padding: 0.75rem 1.5rem;
  font-weight: 700; text-decoration: none;
}
.skip-link:focus { top: 0; }

/* === Header === */
.magazine-header {
  position: sticky; top: 0; z-index: 900;
  background: var(--glass-white); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 2px solid var(--kiwi-green);
  transition: background var(--transition);
}
.header-container {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--header-h); position: relative;
}
.brand {
  display: flex; flex-direction: column; line-height: 1.2;
  position: relative; padding-left: 42px;
}
.brand::before {
  content: ''; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
  width: 32px; height: 32px;
  background: radial-gradient(circle at 35% 35%, var(--kiwi-yellow) 15%, var(--kiwi-green) 40%, var(--accent-orange) 70%);
  border-radius: 50%; border: 2px solid var(--text-dark);
  box-shadow: 0 0 0 3px var(--bg-cream);
}
.brand-name {
  font-family: var(--font-heading); font-weight: 700; font-size: 1.75rem;
  color: var(--text-dark); letter-spacing: 0.02em;
}
.brand-desc {
  font-family: var(--font-caption); font-size: 0.8rem; color: var(--text-soft);
  text-transform: uppercase; letter-spacing: 0.15em;
}

/* === Navigation === */
.nav-list {
  display: flex; align-items: center; gap: 1.25rem;
  list-style: none; font-family: var(--font-caption); font-weight: 500;
  text-transform: uppercase; letter-spacing: 0.05em;
}
.nav-link {
  color: var(--text-dark); padding: 0.25rem 0; position: relative;
  font-size: 0.85rem; white-space: nowrap;
}
.nav-link::after {
  content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px;
  background: var(--accent-orange); transition: width var(--transition);
}
.nav-link:hover::after,
.nav-link[aria-current="page"]::after { width: 100%; }
.nav-link[aria-current="page"] { color: var(--accent-orange); font-weight: 600; }

/* === Nav Toggle (Mobile) === */
.nav-toggle {
  display: none; background: none; border: none; cursor: pointer;
  width: 32px; height: 24px; position: relative; padding: 0;
}
.nav-toggle-icon, .nav-toggle-icon::before, .nav-toggle-icon::after {
  content: ''; display: block; width: 100%; height: 3px;
  background: var(--text-dark); border-radius: 3px;
  position: absolute; left: 0; transition: all var(--transition);
}
.nav-toggle-icon { top: 10.5px; }
.nav-toggle-icon::before { top: -8px; }
.nav-toggle-icon::after { top: 8px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-icon { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before { transform: translateY(8px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after { transform: translateY(-8px) rotate(-45deg); }

/* === Progress Bar === */
.progress-bar {
  position: absolute; bottom: -3px; left: 0; height: 3px;
  width: 0%; background: var(--tech-blue);
  transition: width 0.2s linear;
}
@media (prefers-reduced-motion: reduce) {
  .progress-bar { transition: none; }
  html { scroll-behavior: auto; }
}

/* === Footer === */
.site-footer {
  background: var(--bg-dark); color: var(--bg-cream);
  padding: var(--space-md) 0;
  border-top: 6px solid var(--kiwi-green);
  font-family: var(--font-caption);
}
.footer-container {
  display: grid; grid-template-columns: 1fr 1fr 1fr; gap: var(--space-sm);
}
.footer-brand-name {
  font-family: var(--font-heading); font-size: 1.4rem; font-weight: 700;
  display: block; margin-bottom: 0.25rem;
}
.footer-brand-desc {
  font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.1em; opacity: 0.7;
}
.footer-links { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-link { color: var(--kiwi-yellow); }
.footer-link:hover { color: var(--accent-orange); }
.footer-contact { display: flex; flex-direction: column; gap: 0.25rem; font-size: 0.85rem; }
.footer-contact a { color: var(--kiwi-green); }
.footer-icp {
  grid-column: 1 / -1; text-align: center; margin-top: var(--space-sm);
  padding-top: var(--space-sm); border-top: 1px solid rgba(255,255,255,0.15);
  font-size: 0.75rem; opacity: 0.8;
}

/* === Base Components === */
.btn {
  display: inline-block; padding: 0.6rem 1.6rem;
  background: var(--accent-orange); color: var(--bg-cream);
  border: none; border-radius: 30px; font-family: var(--font-body);
  font-weight: 600; font-size: 0.9rem; cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  text-align: center;
}
.btn:hover, .btn:focus-visible { background: var(--text-dark); transform: scale(1.02); }

.breadcrumb {
  padding: 0.75rem 0; margin-bottom: var(--space-sm);
  background: transparent; font-size: 0.85rem; color: var(--text-soft);
}
.breadcrumb a { color: var(--accent-orange); }
.breadcrumb a:hover { text-decoration: underline; }

.section-spacer {
  padding: var(--space-lg) var(--space-sm);
}
.section-spacer + .section-spacer { padding-top: 0; }

.glass {
  background: var(--glass-white); backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

/* === Grid Utility === */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-sm); }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: var(--space-sm); }

/* === Responsive === */
@media (max-width: 1024px) {
  .footer-container { grid-template-columns: 1fr 1fr; }
  .footer-icp { grid-column: 1 / -1; }
}
@media (max-width: 768px) {
  :root { --header-h: 64px; --space-lg: 4rem; --space-md: 2rem; }
  .brand-name { font-size: 1.3rem; }
  .brand::before { width: 28px; height: 28px; }

  .nav-toggle { display: block; }
  .nav-list {
    position: fixed; top: var(--header-h); right: 0; width: 80%; max-width: 360px;
    height: calc(100vh - var(--header-h)); background: var(--bg-cream);
    flex-direction: column; align-items: flex-start; justify-content: flex-start;
    padding: var(--space-md) var(--space-sm); gap: 0.75rem;
    transform: translateX(100%); transition: transform var(--transition);
    box-shadow: -4px 0 16px rgba(0,0,0,0.1);
  }
  .nav-list[data-open] { transform: translateX(0); }
  .nav-link { font-size: 1rem; padding: 0.6rem 0; width: 100%; }
  .nav-link[aria-current="page"] { background: var(--kiwi-green); color: var(--bg-dark); padding-left: 0.5rem; border-radius: 4px; }

  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .footer-container { grid-template-columns: 1fr; text-align: center; }
  .footer-links, .footer-contact { align-items: center; }
}

/* === RTL & Typography === */
html[lang="zh"] body { text-rendering: optimizeLegibility; }
h1, h2, h3, h4 { font-family: var(--font-heading); font-weight: 700; color: var(--text-dark); }
h1 { font-size: 2.5rem; line-height: 1.15; }

/* === Decorative Lines === */
.decor-line {
  height: 3px; width: 80px; background: var(--kiwi-green);
  margin: var(--space-xs) 0;
}