:root {
  --primary: #FF6B35;
  --primary-dark: #E55A2B;
  --accent: #1A1A2E;
  --accent-light: #16213E;
  --text: #333;
  --text-light: #666;
  --bg: #F8F9FA;
  --white: #fff;
  --border: #E2E8F0;
  --shadow: rgba(0,0,0,0.08);
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { font-family:'PingFang SC','Microsoft YaHei',sans-serif; color:var(--text); background:var(--bg); line-height:1.6; }

a { color:inherit; text-decoration:none; }
img { max-width:100%; height:auto; display:block; }
ul { list-style:none; }

/* Header */
.site-header {
  background:var(--accent);
  position:sticky; top:0; z-index:100;
  box-shadow:0 2px 12px rgba(0,0,0,0.15);
}
.header-inner {
  max-width:1200px; margin:0 auto;
  padding:0 1rem;
  display:flex; align-items:center; gap:2rem;
  height:64px;
}
.logo-area { display:flex; align-items:center; gap:0.5rem; flex-shrink:0; }
.logo-area img { height:36px; width:auto; }
.logo-area .site-name { color:var(--white); font-size:1.2rem; font-weight:700; letter-spacing:1px; }

.main-nav { flex:1; }
.main-nav ul { display:flex; gap:0.25rem; }
.main-nav a {
  color:rgba(255,255,255,0.85);
  padding:0.5rem 1rem;
  border-radius:6px;
  font-size:0.9rem;
  transition:background 0.2s, color 0.2s;
  display:block;
}
.main-nav a:hover, .main-nav a[aria-current="page"] {
  background:rgba(255,255,255,0.12);
  color:var(--white);
}

.menu-toggle { display:none; background:none; border:none; cursor:pointer; padding:0.5rem; }
.menu-toggle svg { width:24px; height:24px; fill:var(--white); }

/* Footer */
.site-footer {
  background:var(--accent);
  color:rgba(255,255,255,0.7);
  padding:2.5rem 1rem 1.5rem;
  margin-top:4rem;
}
.footer-inner { max-width:1200px; margin:0 auto; }
.footer-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(200px,1fr)); gap:2rem; margin-bottom:2rem; }
.footer-brand .site-name { color:var(--white); font-size:1.2rem; font-weight:700; margin-bottom:0.5rem; }
.footer-brand p { font-size:0.85rem; line-height:1.6; }
.footer-col h4 { color:var(--white); font-size:0.95rem; margin-bottom:0.75rem; font-weight:600; }
.footer-col ul li { margin-bottom:0.4rem; }
.footer-col a { color:rgba(255,255,255,0.65); font-size:0.85rem; transition:color 0.2s; }
.footer-col a:hover { color:var(--primary); }
.footer-bottom { border-top:1px solid rgba(255,255,255,0.1); padding-top:1.25rem; text-align:center; font-size:0.8rem; }

/* Container */
.container { max-width:1200px; margin:0 auto; padding:0 1rem; }

/* Mobile menu */
.mobile-nav { display:none; }
@media (max-width:768px) {
  .menu-toggle { display:block; }
  .main-nav { display:none; }
  .main-nav.open { 
    display:flex; flex-direction:column; position:absolute; top:64px; left:0; right:0;
    background:var(--accent); padding:1rem; gap:0.25rem; box-shadow:0 4px 12px rgba(0,0,0,0.2);
  }
  .main-nav.open ul { flex-direction:column; }
  .main-nav.open a { padding:0.75rem 1rem; }
}

/* Buttons */
.btn {
  display:inline-flex; align-items:center; justify-content:center;
  padding:0.6rem 1.4rem; border-radius:6px; font-size:0.9rem;
  font-weight:600; cursor:pointer; border:none; transition:all 0.2s;
}
.btn-primary { background:var(--primary); color:var(--white); }
.btn-primary:hover { background:var(--primary-dark); transform:translateY(-1px); }
.btn-outline { border:2px solid var(--primary); color:var(--primary); background:transparent; }
.btn-outline:hover { background:var(--primary); color:var(--white); }