/* layout.css — 全局布局：container、navbar、footer */

/* ===== Container ===== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  width: 100%;
}

/* ===== Navbar ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--navbar-height);
  background: transparent;
  transition: background var(--transition-fast);
  display: flex;
  align-items: center;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.navbar__brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.navbar__logo {
  height: 2.5rem;
  width: auto;
}

.navbar__title {
  color: var(--color-white);
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.navbar__menu {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.navbar__link {
  color: var(--color-white);
  font-size: var(--font-size-base);
  padding: 0.5rem 0;
  position: relative;
  transition: color var(--transition-fast);
}

/* 下划线动画 */
.navbar__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-white);
  transition: width var(--transition-fast);
}

.navbar__link:hover::after {
  width: 100%;
}

/* 滚动后实色背景 */
.navbar--solid {
  background: var(--color-primary);
}

/* 汉堡菜单按钮（移动端显示） */
.navbar__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
}

.navbar__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  transition: var(--transition-fast);
}

/* ===== Footer ===== */
.footer {
  background: var(--color-bg-dark);
  color: var(--color-text-muted);
  padding: var(--spacing-md) 0;
  text-align: center;
}

.footer__links {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__links-label {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
}

.footer__link {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--color-text-light);
}

.footer__copyright {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-xs);
}

.footer__icp {
  font-size: var(--font-size-sm);
}

/* 导航"进入系统"按钮 */
.navbar__link--cta {
  background: rgba(255, 255, 255, 0.2);
  padding: 0.4rem 1rem !important;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  transition: background var(--transition-fast), border-color var(--transition-fast) !important;
}

.navbar__link--cta:hover {
  background: rgba(255, 255, 255, 0.35);
  border-color: white;
}

.navbar__link--cta::after {
  display: none !important;
}