/* ============================================
   布局样式 - 顶部导航、页脚与响应式适配
   ============================================ */

/* ========== 站点头部结构 ========== */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: var(--z-fixed);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

/* ========== 导航栏样式 ========== */
.navbar {
  border-bottom: 1px solid rgba(17, 24, 39, 0.06);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-6);
  min-height: 78px;
  flex-wrap: nowrap;
}

.navbar-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  text-decoration: none;
  color: var(--color-primary-dark);
  transition: color var(--transition-fast);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-xl);
  letter-spacing: var(--letter-spacing-wide);
  margin-right: var(--spacing-6);
}

.navbar-brand:hover {
  color: var(--color-accent-dark);
}

.navbar-brand span {
  font-size: inherit;
  font-weight: inherit;
  white-space: nowrap;
}

.navbar-menu {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  flex: 1;
  flex-wrap: nowrap;
  list-style: none;
  margin: 0;
  padding: 0;
  min-width: 0;
}

.navbar-item {
  position: relative;
  white-space: nowrap;
}

.navbar-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-3);
  border-radius: var(--radius-full);
  color: var(--color-text-primary);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  transition: color var(--transition-fast), background-color var(--transition-fast), transform var(--transition-fast);
}

.navbar-link:hover {
  color: var(--color-primary-dark);
  background-color: rgba(52, 73, 94, 0.08);
  transform: translateY(-1px);
}

.navbar-link.active {
  background-color: rgba(46, 204, 113, 0.12);
  color: var(--color-accent-dark);
}

.navbar-link::after {
  content: '';
  position: absolute;
  inset: auto var(--spacing-4) -4px var(--spacing-4);
  height: 3px;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, rgba(46, 204, 113, 0.85), rgba(15, 23, 42, 0.85));
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-fast);
}

.navbar-link:hover::after,
.navbar-link.active::after {
  transform: scaleX(1);
}

.navbar-link .indicator {
  display: inline-flex;
  padding: 0 var(--spacing-1);
  font-size: var(--font-size-xs);
  color: var(--color-accent);
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  flex-shrink: 0;
}

.navbar-phone {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--spacing-1);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  color: var(--color-text-tertiary);
}

.navbar-phone strong {
  font-size: var(--font-size-lg);
  letter-spacing: 0.04em;
  color: var(--color-primary-dark);
}

.navbar .btn {
  border-radius: var(--radius-full);
  padding: var(--spacing-3) var(--spacing-5);
}

/* ========== 下拉菜单 ========== */
.dropdown {
  position: relative;
}

.dropdown::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  height: 18px;
}

.dropdown-toggle::after {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  margin-left: var(--spacing-2);
  transition: transform var(--transition-fast);
}

.dropdown:hover .dropdown-toggle::after {
  transform: rotate(-135deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  padding: var(--spacing-2);
  border-radius: var(--radius-2xl);
  border: 1px solid rgba(17, 24, 39, 0.08);
  background: var(--color-white);
  box-shadow: 0 30px 60px -28px rgba(15, 23, 42, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-12px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
  list-style: none;
  z-index: var(--z-dropdown);
  pointer-events: none;
}

.dropdown:hover .dropdown-menu,
.dropdown.active .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  padding: var(--spacing-3) var(--spacing-4);
  border-radius: var(--radius-xl);
  color: var(--color-text-primary);
  text-decoration: none;
  transition: background-color var(--transition-fast), color var(--transition-fast), padding var(--transition-fast);
}

.dropdown-item:hover {
  background: rgba(46, 204, 113, 0.12);
  color: var(--color-primary-dark);
  padding-left: var(--spacing-5);
}

.dropdown-item span {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
}

.dropdown-divider {
  height: 1px;
  background: rgba(17, 24, 39, 0.06);
  margin: var(--spacing-2) 0;
}

/* ========== 移动端导航 ========== */
.navbar-toggle {
  display: none;
  background: transparent;
  border: 1px solid rgba(17, 24, 39, 0.12);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2) var(--spacing-3);
  color: var(--color-primary-dark);
  font-size: var(--font-size-xl);
}

.navbar-toggle span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
}

@media (max-width: 1024px) {
  .navbar__inner {
    gap: var(--spacing-4);
  }

  .navbar-menu {
    gap: var(--spacing-1);
  }
}

@media (max-width: 900px) {
  .navbar-toggle {
    display: inline-flex;
  }

  .navbar-menu {
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-white);
    border-radius: var(--radius-2xl);
    margin: 0 var(--spacing-6);
    padding: var(--spacing-4);
    border: 1px solid rgba(17, 24, 39, 0.08);
    box-shadow: 0 30px 60px -28px rgba(15, 23, 42, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity var(--transition-fast), transform var(--transition-fast);
  }

  .navbar-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .navbar-actions {
    display: none;
  }

  .dropdown-menu {
    position: static;
    margin-top: var(--spacing-2);
    border-radius: var(--radius-xl);
    box-shadow: none;
    border: none;
    padding: var(--spacing-2) var(--spacing-3);
  }

  .dropdown-item {
    padding: var(--spacing-2) var(--spacing-3);
  }
}

@media (max-width: 1180px) {
  .navbar-phone {
    display: none;
  }

  .navbar-actions .btn {
    padding: var(--spacing-3) var(--spacing-4);
  }

  .navbar-link {
    padding: var(--spacing-3) var(--spacing-2);
  }
}

/* ========== 页脚样式 ========== */
.footer {
  margin-top: var(--spacing-24);
  background: radial-gradient(circle at top right, rgba(46, 204, 113, 0.18), transparent 45%), #0F172A;
  color: rgba(255, 255, 255, 0.82);
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0), rgba(15, 23, 42, 0.9));
  pointer-events: none;
}

.footer-top {
  padding: var(--spacing-20) 0 var(--spacing-12);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-5);
}

.footer-brand h2 {
  font-size: var(--font-size-3xl);
  color: var(--color-white);
  letter-spacing: -0.02em;
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.8;
}

.footer-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-3);
}

.footer-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-2) var(--spacing-3);
  border-radius: var(--radius-full);
  background-color: rgba(148, 163, 184, 0.16);
  color: rgba(255, 255, 255, 0.82);
  font-size: var(--font-size-xs);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing-10);
  margin-top: var(--spacing-12);
}

.footer-section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

.footer-section h3 {
  color: var(--color-white);
  font-size: var(--font-size-lg);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.footer-section ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--spacing-3);
}

.footer-section a {
  color: rgba(255, 255, 255, 0.72);
  text-decoration: none;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.footer-section a:hover {
  color: var(--color-white);
  transform: translateX(4px);
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.footer-contact-item {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-1);
}

.footer-contact-item span {
  font-size: var(--font-size-xs);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  color: rgba(148, 163, 184, 0.75);
}

.footer-divider {
  height: 1px;
  background: rgba(148, 163, 184, 0.2);
  margin: 0;
}

.footer-bottom {
  padding: var(--spacing-10) 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-6);
  flex-wrap: wrap;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-4);
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.6);
}

.footer-legal a {
  color: inherit;
  text-decoration: none;
}

.footer-legal a:hover {
  color: var(--color-white);
}

.footer-social {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-3);
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: rgba(148, 163, 184, 0.18);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: var(--font-size-sm);
  transition: transform var(--transition-fast), background var(--transition-fast);
}

.footer-social a:hover {
  transform: translateY(-2px);
  background: rgba(46, 204, 113, 0.28);
}

/* ========== 悬浮咨询组件 ========== */
.floating-cta {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: calc(var(--z-fixed) - 1);
  width: 320px;
  border-radius: var(--radius-3xl);
  background: var(--color-white);
  box-shadow: 0 35px 70px -40px rgba(15, 23, 42, 0.45);
  border: 1px solid rgba(17, 24, 39, 0.08);
  transition: opacity var(--transition-base), transform var(--transition-base);
  opacity: 0;
  transform: translateY(24px);
  pointer-events: none;
}

.floating-cta.floating-cta--visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.floating-cta__fab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: var(--spacing-4) var(--spacing-5);
  border: none;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: var(--color-white);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-3xl);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.floating-cta__fab:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 35px -28px rgba(46, 204, 113, 0.6);
}

.floating-cta__body {
  display: none;
  padding: var(--spacing-6);
  gap: var(--spacing-4);
}

.floating-cta--expanded .floating-cta__body {
  display: grid;
}

.floating-cta--expanded .floating-cta__fab {
  display: none;
}

.floating-cta__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--spacing-4);
}

.floating-cta__label {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  color: var(--color-accent-dark);
}

.floating-cta__header strong {
  display: block;
  font-size: 1.4rem;
  color: var(--color-primary-dark);
  margin-top: var(--spacing-2);
}

.floating-cta__close {
  background: transparent;
  border: none;
  color: var(--color-text-tertiary);
  font-size: var(--font-size-lg);
  cursor: pointer;
}

.floating-cta__body p {
  margin: 0;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.floating-cta__buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-3);
}

.floating-cta__meta {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-1);
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
}

.floating-cta__meta a {
  color: var(--color-primary);
  text-decoration: none;
}

.floating-cta__meta a:hover {
  color: var(--color-accent-dark);
}

.floating-cta__hint {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  margin-top: var(--spacing-2);
}

.floating-cta__hint::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }

  .floating-cta {
    bottom: 24px;
    right: 24px;
    width: min(320px, 86vw);
  }
}

@media (max-width: 768px) {
  .site-header {
    background: rgba(255, 255, 255, 0.98);
  }

  .navbar__inner {
    min-height: 72px;
  }

  .footer-top {
    padding: var(--spacing-16) 0 var(--spacing-10);
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .floating-cta {
    bottom: 18px;
    right: 18px;
  }
}