/* ============================================================
   components.css —— 可复用组件
   导航 / 汉堡 / 按钮 / 分类标题 / 图片卡片 / lightbox / 回到顶部
   ============================================================ */

/* 无障碍焦点框 */
*:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 3px;
}

/* ---------------- 顶栏导航 ---------------- */
.nav {
  display: flex;
  align-items: center;
  gap: 34px;
}
.nav-link {
  position: relative;
  font-family: var(--font-cn);
  font-size: 1rem;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  padding: 6px 2px;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--green);
  transition: width var(--ease);
}
.nav-link:hover { color: var(--green); }
.nav-link:hover::after,
.nav-link.active::after { width: 100%; }
.nav-link.active { color: var(--green); }

/* ---------------- 汉堡菜单按钮（移动端显示） ---------------- */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  width: 42px;
  height: 42px;
  flex-shrink: 0;
}
.nav-toggle span {
  display: block;
  width: 26px;
  height: 2px;
  border-radius: 2px;
  background: var(--ink);
  transition: transform var(--ease), opacity var(--ease);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ---------------- 主按钮 ---------------- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 38px;
  font-family: var(--font-cn);
  font-size: 1.02rem;
  letter-spacing: 0.16em;
  padding-left: calc(38px + 0.16em);
  color: #fff;
  background: var(--green);
  border-radius: 2px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--ease), background var(--ease), box-shadow var(--ease);
}
.btn-primary:hover {
  background: var(--green-deep);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

/* ---------------- 菜单分类导航（吸顶横条） ---------------- */
.menu-nav {
  position: sticky;
  top: var(--header-h);
  z-index: 90;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 9px 10px;
  padding: 14px 24px;
  background: rgba(250, 247, 240, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line);
}
.menu-nav-link {
  white-space: nowrap;
  padding: 7px 16px;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: color var(--ease), background var(--ease), border-color var(--ease);
}
.menu-nav-link:hover {
  color: var(--green);
  border-color: var(--green);
}
.menu-nav-link.active {
  color: #fff;
  background: var(--green);
  border-color: var(--green);
}

/* ---------------- 分类水墨标题 ---------------- */
.cat-banner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 18px;
}
.cat-index {
  flex-shrink: 0;
  font-family: var(--font-en);
  font-weight: 700;
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(58, 74, 63, 0.4);
}
.cat-name-cn {
  flex-shrink: 0;
  font-family: var(--font-cn);
  font-weight: 700;
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  letter-spacing: 0.08em;
  color: var(--green-deep);
}
.cat-name-en {
  flex-shrink: 0;
  font-family: var(--font-en);
  font-style: italic;
  font-size: clamp(0.9rem, 2vw, 1.15rem);
  letter-spacing: 0.04em;
  color: var(--red);
}
.cat-banner::after {
  content: "";
  flex: 1 1 40px;
  height: 2px;
  background: linear-gradient(90deg, rgba(58, 74, 63, 0.28), transparent);
}

/* ---------------- 菜单图卡片 ---------------- */
.menu-figure {
  position: relative;
  margin: 0;
}
.menu-img {
  width: 100%;
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-img);
  box-shadow: var(--shadow);
  cursor: zoom-in;
  transition: transform var(--ease), box-shadow var(--ease);
}
.menu-img:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
/* hover 放大镜角标提示 */
.menu-figure::after {
  content: "\2922";              /* ⤢ 对角双箭头 */
  position: absolute;
  right: 16px;
  bottom: 16px;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(58, 74, 63, 0.88);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  opacity: 0;
  transform: scale(0.82);
  transition: opacity var(--ease), transform var(--ease);
  pointer-events: none;
}
.menu-figure:hover::after {
  opacity: 1;
  transform: scale(1);
}

/* ---------------- Lightbox 图片放大 ---------------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(22, 20, 16, 0.93);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--ease), visibility var(--ease);
}
.lightbox.open {
  opacity: 1;
  visibility: visible;
}
.lb-stage {
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 92vw;
  max-height: 86vh;
}
.lb-img {
  max-width: 92vw;
  max-height: 86vh;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: 4px;
  box-shadow: var(--shadow-lg);
  transform: scale(0.96);
  transition: transform var(--ease);
}
.lightbox.open .lb-img { transform: scale(1); }

.lb-close {
  position: absolute;
  top: 20px;
  right: 24px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  line-height: 1;
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  transition: background var(--ease), transform var(--ease);
}
.lb-close:hover { background: rgba(255, 255, 255, 0.22); transform: rotate(90deg); }

.lb-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.4rem;
  line-height: 1;
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  transition: background var(--ease);
}
.lb-nav:hover { background: rgba(255, 255, 255, 0.24); }
.lb-prev { left: 24px; }
.lb-next { right: 24px; }

.lb-caption {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  padding: 8px 22px;
  font-family: var(--font-cn);
  font-size: 1rem;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.92);
  background: rgba(0, 0, 0, 0.35);
  border-radius: 999px;
  white-space: nowrap;
}

/* ---------------- 回到顶部 ---------------- */
.back-to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 80;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: #fff;
  background: var(--green);
  border-radius: 50%;
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity var(--ease), visibility var(--ease), transform var(--ease), background var(--ease);
}
.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.back-to-top:hover {
  background: var(--green-deep);
  transform: translateY(-3px);
}