/* ==========================================================================
   导航栏 Navbar
   ========================================================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px 0;
  background: rgba(250, 247, 242, 0.85);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: all var(--duration-base) var(--ease-out);
}

.navbar.is-scrolled {
  padding: 12px 0;
  background: rgba(250, 247, 242, 0.95);
  border-bottom-color: var(--color-line);
  box-shadow: var(--shadow-xs);
}

.navbar.is-dark {
  background: rgba(44, 38, 32, 0.85);
}

.navbar.is-dark .nav-link,
.navbar.is-dark .nav-logo-text,
.navbar.is-dark .nav-toggle span,
.navbar.is-dark .nav-tel {
  color: var(--color-bg);
}

.navbar.is-dark.is-scrolled {
  background: rgba(44, 38, 32, 0.95);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-serif);
  font-size: var(--fs-lg);
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink);
  flex-shrink: 0;
}

.nav-logo-mark {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.nav-logo-mark svg {
  width: 100%;
  height: 100%;
}

.nav-logo-text {
  font-family: var(--font-serif);
  font-weight: 500;
  letter-spacing: var(--tracking-wider);
  color: var(--color-ink);
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.nav-logo-text small {
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: var(--tracking-widest);
  color: var(--color-muted);
  text-transform: uppercase;
  margin-top: 2px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-item {
  position: relative;
}

.nav-link {
  font-family: var(--font-sans);
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink);
  padding: 8px 0;
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color var(--duration-fast) var(--ease-out);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--color-gold-deep);
  transition: width var(--duration-base) var(--ease-out);
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--color-gold-deep);
}

.nav-link:hover::after,
.nav-link.is-active::after {
  width: 100%;
}

.nav-item.has-dropdown .nav-link::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  margin-left: 2px;
  opacity: 0.6;
}

.nav-dropdown {
  position: absolute;
  top: calc(100% + 16px);
  left: -16px;
  min-width: 220px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 12px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--duration-base) var(--ease-out);
}

.nav-item.has-dropdown:hover .nav-dropdown,
.nav-item.has-dropdown:focus-within .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown a {
  display: block;
  padding: 10px 16px;
  font-size: var(--fs-sm);
  color: var(--color-text);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
}

.nav-dropdown a:hover {
  background: var(--color-bg-alt);
  color: var(--color-ink);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav-tel {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-serif);
  font-size: var(--fs-md);
  font-weight: 500;
  color: var(--color-ink);
}

.nav-tel svg {
  width: 14px;
  height: 14px;
}

.nav-cta {
  padding: 10px 24px;
  background: var(--color-ink);
  color: var(--color-bg);
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  border-radius: var(--radius-full);
  transition: all var(--duration-base) var(--ease-out);
}

.nav-cta:hover {
  background: var(--color-gold-deep);
  transform: translateY(-1px);
}

/* 移动端专用精简 CTA（在抽屉菜单顶部显示） */
.nav-cta-mobile {
  display: none;
  align-items: center;
  justify-content: center;
  padding: 14px 22px;
  background: var(--color-ink);
  color: var(--color-bg);
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  border-radius: var(--radius-full);
  width: 100%;
  margin-top: 12px;
}

.nav-cta-mobile:hover {
  background: var(--color-gold-deep);
  color: var(--color-bg);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  height: 28px;
  align-items: center;
  justify-content: center;
}

.nav-toggle span {
  width: 22px;
  height: 1.5px;
  background: var(--color-ink);
  border-radius: 2px;
  transition: all var(--duration-base) var(--ease-out);
}

.nav-toggle.is-open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* 移动端 */
@media (max-width: 1024px) {
  .navbar {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: 0;
    bottom: auto;
    width: 100%;
    height: 100vh;
    height: 100dvh;
    max-width: 380px;
    background: var(--color-bg);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    /* 顶部留出 Logo 高度 + 关闭按钮区，避免与导航栏视觉冲突 */
    padding: 72px 28px 32px;
    gap: var(--space-4);
    transform: translateX(100%);
    transition: transform var(--duration-base) var(--ease-out);
    box-shadow: var(--shadow-xl);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
  }

  /* 抽屉顶部的关闭按钮（仅移动端可见） */
  .nav-close {
    display: none;
  }
  .nav-menu.is-open .nav-close {
    display: inline-flex;
  }

  .nav-menu::before {
    content: "";
    position: absolute;
    top: 18px;
    right: 18px;
    width: 36px;
    height: 36px;
    background:
      linear-gradient(45deg, transparent 46%, var(--color-ink) 46%, var(--color-ink) 54%, transparent 54%),
      linear-gradient(-45deg, transparent 46%, var(--color-ink) 46%, var(--color-ink) 54%, transparent 54%);
    opacity: 0.7;
    pointer-events: none;
  }

  .nav-menu.is-open {
    transform: translateX(0);
  }

  .navbar.is-dark .nav-menu .nav-link {
    color: var(--color-ink);
  }

  .navbar.is-dark .nav-menu .nav-link:hover,
  .navbar.is-dark .nav-menu .nav-link.is-active {
    color: var(--color-gold-deep);
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    width: 100%;
    /* 让列表自身能伸缩：内容超出视口高度时可滚动到全部项 */
    flex: 1 1 auto;
  }

  .nav-item {
    width: 100%;
    border-bottom: 1px solid var(--color-line);
  }
  .nav-item:last-child {
    border-bottom: none;
  }

  .nav-link {
    font-size: var(--fs-lg);
    width: 100%;
    padding: 14px 0;
    justify-content: space-between;
  }

  .nav-dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    padding: 0 0 12px 0;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 2px;
  }

  .nav-dropdown a {
    padding: 10px 12px;
    font-size: var(--fs-sm);
    color: var(--color-muted);
    border-radius: var(--radius-md);
  }

  .nav-tel { display: none; }

  /* 移动端：CTA 缩为图标式紧凑按钮，避免与汉堡按钮挤占空间 */
  .nav-cta {
    width: 40px;
    height: 40px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    flex-shrink: 0;
    color: var(--color-bg);
  }
  .nav-cta-text { display: none; }
  .nav-cta-icon { display: inline-block; }

  .nav-cta-mobile { display: inline-flex; }

  .nav-toggle { display: flex; }
}

/* 遮罩层 */
.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(44, 38, 32, 0.4);
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-base) var(--ease-out);
  z-index: 99;
}

.nav-overlay.is-visible {
  opacity: 1;
  visibility: visible;
}