/* ========== 全局变量 ========== */
:root {
  --bg-deep: #0a0a0f;
  --bg-primary: #12121a;
  --bg-secondary: #1a1a26;
  --bg-card: #1e1e2a;
  --bg-card-hover: #252532;
  --gold: #d4af37;
  --gold-light: #f5d042;
  --gold-dark: #b8962e;
  --neon-purple: #a855f7;
  --neon-cyan: #22d3ee;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border: rgba(148, 163, 184, 0.15);
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.5);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: "Noto Sans SC", "Microsoft YaHei", -apple-system, sans-serif;
  background: var(--bg-deep);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

/* ========== 顶部导航 ========== */
.nav-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: rgba(10, 10, 15, 0.9);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-brand a {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-img { height: 32px; width: auto; }
.logo-text { font-size: 18px; font-weight: 600; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}

.nav-link:hover { color: var(--gold); }
.nav-link.active { color: var(--gold); background: rgba(212, 175, 55, 0.12); }

.nav-collapse { display: flex; align-items: center; gap: 16px; }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-user {
  color: var(--text-secondary);
  font-size: 14px;
  cursor: pointer;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  position: relative;
}
.nav-user:hover { color: var(--gold); }

.nav-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 24px;
  cursor: pointer;
  padding: 4px 8px;
}

/* 用户下拉菜单 */
.nav-user-wrap { position: relative; }
.nav-user-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 8px;
  min-width: 180px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  z-index: 100;
}
.nav-user-dropdown.active { display: block; }
.nav-user-dropdown a,
.nav-user-dropdown button {
  display: block;
  width: 100%;
  padding: 12px 16px;
  text-align: left;
  color: var(--text-primary);
  background: none;
  border: none;
  cursor: pointer;
  font-size: 14px;
}
.nav-user-dropdown a:hover,
.nav-user-dropdown button:hover {
  background: rgba(255,255,255,0.06);
}
.nav-user-dropdown .divider { height: 1px; background: var(--border); }

/* 移动端 */
@media (max-width: 768px) {
  .nav-menu-toggle { display: block; }
  .nav-collapse {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(10, 10, 15, 0.98);
    border-bottom: 1px solid var(--border);
    padding: 16px;
    flex-direction: column;
    gap: 16px;
  }
  .nav-main.nav-open .nav-collapse {
    display: flex;
  }
  .nav-main { position: relative; flex-wrap: wrap; }
  .nav-links { flex-direction: column; }
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-sm { padding: 8px 16px; font-size: 13px; }
.btn-block { width: 100%; }

.btn-primary {
  background: linear-gradient(135deg, var(--gold) 0%, var(--gold-dark) 100%);
  color: #0a0a0f;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--gold-light) 0%, var(--gold) 100%);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(212, 175, 55, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-outline:hover { border-color: var(--gold); color: var(--gold); }

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover { color: var(--text-primary); background: rgba(255, 255, 255, 0.06); }

.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: var(--danger-hover); }

/* ========== 页脚 ========== */
.footer-main {
  padding: 40px 0;
  border-top: 1px solid var(--border);
  background: rgba(10, 10, 15, 0.6);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-size: 14px;
  color: var(--text-muted);
  flex-wrap: wrap;
}

/* ========== 通用模态框 ========== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  overflow-y: auto;
  padding: 24px;
}

.modal-overlay.active { display: flex; }

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.modal-header h2 { font-size: 18px; }
.modal-close {
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 24px;
  cursor: pointer;
}

.modal-body { padding: 24px; }
.modal-footer { display: flex; justify-content: flex-end; gap: 12px; padding: 20px 24px; border-top: 1px solid var(--border); }

.modal .form-group { margin-bottom: 20px; }
.modal .form-group label { display: block; margin-bottom: 8px; color: var(--text-secondary); font-size: 13px; }
.modal input {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 14px;
}
.modal input:disabled { opacity: 0.7; cursor: not-allowed; }