/* ========================================
   天一风物志 — 全局样式
   ======================================== */

@import url('variables.css?v=5');
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@900&display=swap');

/* ---- CSS Reset ---- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scrollbar-gutter: stable;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.8;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

/* 所有可交互元素共用清晰的键盘焦点反馈。 */
:where(a, button, input, select, textarea, [tabindex]):focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

:where(button, input, select, textarea):disabled,
[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
}

ul, ol {
  list-style: none;
}

/* ---- 排版 ---- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-text);
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  position: relative;
  padding-bottom: var(--spacing-md);
  font-size: 32px;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--color-primary);
  margin: var(--spacing-sm) auto 0;
  border-radius: 2px;
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-secondary);
  font-size: var(--fs-body);
  margin-top: calc(-1 * var(--spacing-md));
  margin-bottom: var(--spacing-2xl);
  font-family: var(--font-body);
  font-weight: 400;
}

/* 板块页内容模块标题：英文眉题 + 中文主标题 + 中文副标题 */
.channel-section-heading {
  width: 100%;
  margin-bottom: var(--spacing-xl);
}

.channel-section-heading__eyebrow {
  display: block;
  margin: 0 0 6px;
  color: var(--color-primary-dark);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.channel-section-heading__row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--spacing-lg);
}

.channel-section-heading__title.section-title {
  flex: 0 1 auto;
  margin-bottom: 0;
  text-align: left;
}

.channel-section-heading__title.section-title::after { margin-left: 0; }

.channel-section-heading__note {
  flex: 0 1 600px;
  width: min(600px, 50vw);
  max-width: 600px;
  margin: 8px 0 0;
  color: var(--color-text-secondary);
  font-size: var(--fs-body);
  line-height: 1.8;
  text-align: right;
}

.channel-section-heading__note strong {
  color: var(--color-primary-dark);
  font-family: var(--font-heading);
  font-size: 22px;
}

.channel-section-heading__aside {
  flex: 0 1 600px;
  width: min(600px, 50vw);
  max-width: 600px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
}

.channel-section-heading__aside .channel-section-heading__note {
  flex: 0 1 auto;
  width: 100%;
  max-width: none;
}

/* ---- 容器 ---- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--page-gutter);
}

.section {
  padding: var(--spacing-3xl) 0;
}

.section-alt {
  background-color: var(--color-bg-alt);
}

/* 频道列表页内容模块：头图之后按米白、浅米灰交替 */
.alternating-sections > section:not(.page-hero):not(.section-tone-custom) {
  background: var(--color-bg);
}

.alternating-sections > section:not(.page-hero):not(.section-tone-custom):nth-of-type(odd) {
  background: var(--color-bg-alt);
}

/* 公共标题作为模块首元素时，板块页统一保留 24px 顶部内边距。 */
.channel-sections > section:not(.page-hero) {
  padding-top: 24px;
}

/* 频道底部深色模块公共主题 */
.section-tone-deep {
  background: var(--color-surface-deep, #183d4b);
  color: #fff;
}

.section-tone-deep .section-tone-title { color: #fff; }
.section-tone-deep .section-tone-eyebrow { color: #92c9d9; }
.section-tone-deep .section-tone-note { color: rgba(255, 255, 255, .68); }
.section-tone-deep .channel-section-heading__note strong { color: #d7c19a; }

.section-tone-deep .section-tone-card {
  border: 1px solid rgba(255, 255, 255, .13);
  background: rgba(255, 255, 255, .11);
  backdrop-filter: blur(5px);
}

.section-tone-deep .section-tone-card h3,
.section-tone-deep .section-tone-card strong { color: #fff; }

.section-tone-deep .section-tone-card p { color: rgba(255, 255, 255, .68); }

/* ---- 导航栏 ---- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  flex-direction: column;
  background: transparent;
  z-index: 1000;
  transition: background var(--transition-normal), box-shadow var(--transition-normal);
}

.navbar-main {
  width: 100%;
  height: var(--navbar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--page-gutter);
}

/* ---- 导航栏第二行（详情页 Tab） ---- */
.navbar-sub {
  display: none;
  height: 0;
  transition: height var(--transition-normal);
}
.navbar-sub.active {
  display: flex;
  height: 44px;
}
.navbar.scrolled .navbar-sub.active {
  border-top: 1px solid var(--color-border);
}
.navbar-sub-inner {
  display: flex;
  align-items: stretch;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--page-gutter);
  width: 100%;
  height: 100%;
}

/* ---- 导航栏子区：分类按钮 ---- */
.sub-cat-control {
  position: relative;
  display: flex;
  flex-shrink: 0;
}

.sub-cat-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 16px 0 0;
  font-size: 13px;
  font-weight: 600;
  color: rgba(255,255,255,0.9);
  background: none;
  border: none;
  border-right: 1px solid rgba(255,255,255,0.15);
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  position: relative;
  transition: all var(--transition-fast);
}
.sub-cat-btn:hover {
  color: #fff;
}
.sub-cat-btn .arrow {
  font-size: 10px;
  transition: transform var(--transition-fast);
}
.sub-cat-btn.open .arrow {
  transform: rotate(180deg);
}
.navbar.scrolled .sub-cat-btn {
  color: var(--color-primary);
  border-right-color: var(--color-border);
}

/* ---- 导航栏子区：分类下拉菜单 ---- */
.sub-cat-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--color-primary-dark);
  border-radius: 0 0 var(--border-radius) var(--border-radius);
  box-shadow: var(--shadow-lg);
  z-index: 100;
  min-width: 180px;
  overflow: hidden;
}
.sub-cat-menu.open {
  display: block;
}
.sub-cat-menu a {
  display: block;
  padding: 10px 16px;
  font-size: var(--fs-small);
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  transition: background var(--transition-fast);
}
.sub-cat-menu a:last-child {
  border-bottom: none;
}
.sub-cat-menu a:hover {
  background: rgba(255,255,255,0.15);
  color: #fff;
}
.sub-cat-menu a.active {
  color: #fff;
  font-weight: 600;
  background: rgba(255,255,255,0.12);
}
.navbar.scrolled .sub-cat-menu {
  background: var(--color-white);
}
.navbar.scrolled .sub-cat-menu a {
  color: var(--color-text);
  border-bottom-color: var(--color-border);
}
.navbar.scrolled .sub-cat-menu a:hover {
  background: var(--color-primary-bg);
  color: var(--color-primary);
}
.navbar.scrolled .sub-cat-menu a.active {
  color: var(--color-primary);
  font-weight: 600;
  background: var(--color-primary-bg);
}

/* ---- 导航栏子区：景点 Tab ---- */
.sub-item-tabs {
  display: flex;
  gap: 0;
  overflow-x: auto;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  flex: 1;
  align-items: stretch;
  padding: 0 25px;
}
.sub-item-tabs::-webkit-scrollbar {
  display: none;
}
.sub-item-tabs a {
  display: inline-flex;
  align-items: center;
  padding: 0 16px;
  font-size: var(--fs-small);
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}
.sub-item-tabs a:hover {
  color: #fff;
  background: rgba(255,255,255,0.1);
}
.sub-item-tabs a.active {
  color: #fff;
  border-bottom-color: rgba(255,255,255,0.8);
  font-weight: 600;
}
.navbar.scrolled .sub-item-tabs a {
  color: var(--color-text-secondary);
}
.navbar.scrolled .sub-item-tabs a:hover {
  color: var(--color-primary);
  background: var(--color-primary-bg);
}
.navbar.scrolled .sub-item-tabs a.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
}

.navbar .logo {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 900;
  letter-spacing: 1px;
  color: var(--color-white);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  transition: color var(--transition-fast);
}

.navbar.scrolled .logo {
  color: var(--color-text);
}

.navbar .logo-icon {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-item {
  position: relative;
}

.nav-primary-link,
.nav-group-toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 44px;
  padding: var(--spacing-xs) 0;
  border: 0;
  background: transparent;
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.nav-group-toggle {
  cursor: pointer;
}

.nav-group-arrow {
  width: 7px;
  height: 7px;
  margin-top: -3px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  transition: transform var(--transition-fast);
}

.nav-item.open .nav-group-arrow {
  margin-top: 3px;
  transform: rotate(225deg);
}

.navbar.scrolled .nav-primary-link,
.navbar.scrolled .nav-group-toggle {
  color: var(--color-text-secondary);
}

.nav-primary-link:hover,
.nav-primary-link.active,
.nav-group-toggle:hover,
.nav-group-toggle.active,
.nav-item.open .nav-group-toggle {
  color: var(--color-white);
}

.navbar.scrolled .nav-primary-link:hover,
.navbar.scrolled .nav-primary-link.active,
.navbar.scrolled .nav-group-toggle:hover,
.navbar.scrolled .nav-group-toggle.active,
.navbar.scrolled .nav-item.open .nav-group-toggle {
  color: var(--color-primary);
}

.nav-primary-link::after,
.nav-group-toggle::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-normal);
}

.nav-primary-link:hover::after,
.nav-primary-link.active::after,
.nav-group-toggle:hover::after,
.nav-group-toggle.active::after,
.nav-item.open .nav-group-toggle::after {
  width: 100%;
}

.nav-dropdown {
  position: absolute;
  z-index: 101;
  top: calc(100% + 6px);
  left: 50%;
  display: grid;
  width: 286px;
  padding: 8px;
  border: 1px solid rgba(51, 51, 51, 0.08);
  border-radius: var(--border-radius-lg);
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 16px 38px rgba(24, 38, 44, 0.18);
  transform: translateX(-50%);
}

.nav-item:last-child .nav-dropdown {
  right: 0;
  left: auto;
  transform: none;
}

@media (min-width: 1101px) {
  .nav-dropdown--columns-2 {
    width: max-content;
    grid-template-columns: repeat(2, max-content);
    column-gap: 8px;
  }
}

.nav-dropdown[hidden] {
  display: none;
}

.nav-secondary-link {
  display: grid;
  gap: 1px;
  min-height: 58px;
  padding: 9px 12px;
  border-radius: var(--border-radius);
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-secondary-link:hover,
.nav-secondary-link.active {
  color: var(--color-primary-dark);
  background: var(--color-primary-bg);
}

.nav-secondary-label {
  font-size: var(--fs-small);
  font-weight: 700;
  line-height: 1.6;
}

.nav-secondary-description {
  color: var(--color-text-light);
  font-size: var(--fs-xs);
  line-height: 1.6;
}

.nav-secondary-link.active .nav-secondary-description {
  color: var(--color-text-secondary);
}

/* ---- 汉堡菜单按钮 ---- */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  transition: all var(--transition-normal);
  border-radius: 1px;
}

.navbar.scrolled .hamburger span {
  background: var(--color-text);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ---- Footer ---- */
.footer {
  background: var(--color-text);
  color: rgba(255, 255, 255, 0.7);
  padding: 56px 0 24px;
  font-size: var(--fs-small);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--page-gutter);
  display: grid;
  grid-template-columns: minmax(220px, .75fr) minmax(0, 2fr);
  gap: 44px 72px;
}

.footer-brand-block > p {
  margin-top: 5px;
  color: rgba(255, 255, 255, 0.62);
}

.footer-brand-block .footer-brand-note {
  max-width: 260px;
  margin-top: 18px;
  color: rgba(255, 255, 255, 0.44);
  font-size: var(--fs-xs);
  line-height: 1.9;
}

.footer-brand {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 900;
  letter-spacing: 1px;
  color: rgba(255, 255, 255, 0.92);
}

.footer-brand:hover,
.footer-bottom a:hover {
  color: var(--color-white);
}

.footer-directory {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: var(--spacing-xl);
}

.footer-group-title {
  margin-bottom: var(--spacing-md);
  color: rgba(255, 255, 255, 0.92);
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: 700;
}

.footer-group ul {
  display: grid;
  gap: 8px;
}

.footer-group--columns-2 {
  grid-column: span 2;
}

.footer-group--columns-2 ul {
  grid-template-columns: repeat(2, max-content);
  justify-content: center;
  gap: 8px clamp(32px, 4vw, 56px);
}

.footer-group--columns-2 a {
  white-space: nowrap;
}

.footer-group--columns-2 .footer-group-title {
  text-align: center;
}

.footer-group a,
.footer-bottom a {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  grid-column: 1 / -1;
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-md);
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.42);
  font-size: var(--fs-xs);
}

/* ---- 卡片组件 ---- */
.card {
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.content-card {
  display: block;
  color: inherit;
  text-decoration: none;
}

.card:hover,
.card:focus-visible {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.card-body {
  padding: var(--spacing-md) var(--spacing-lg);
}

.card-title {
  font-family: var(--font-heading);
  font-size: 24px;
  margin-bottom: var(--spacing-sm);
}

.card-text {
  font-size: var(--fs-small);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-sm);
}

.tag {
  display: inline-block;
  padding: 2px 10px;
  font-size: var(--fs-xs);
  color: var(--color-primary);
  background: var(--color-primary-bg);
  border-radius: 20px;
}

/* ---- 按钮 ---- */
.btn {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  font-size: var(--fs-small);
  font-family: var(--font-body);
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.card-meta {
  display: grid;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-sm);
  color: var(--color-text-light);
  font-size: var(--fs-xs);
}
.card-meta--split {
  grid-template-columns: repeat(2, minmax(0, auto));
  justify-content: space-between;
  gap: var(--spacing-md);
}

.btn:active {
  transform: translateY(1px);
}

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

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

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

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

/* ---- 淡入动画（初始状态） ---- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- 网格布局 ---- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
}

/* ---- 页面标题区 ---- */
.page-hero {
  position: relative;
  height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--color-white);
  overflow: hidden;
}

.page-hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, rgba(0,0,0,0.4), rgba(0,0,0,0.6));
  z-index: 1;
}

.page-hero-content {
  position: relative;
  z-index: 2;
}

.page-hero h1 {
  font-size: 42px;
  color: var(--color-white);
  margin-bottom: var(--spacing-sm);
}

.page-hero p {
  font-size: var(--fs-body);
  opacity: 0.9;
}

/* ---- 返回顶部 ---- */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: 999;
  box-shadow: var(--shadow-md);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--color-primary-dark);
  transform: translateY(-3px);
}

/* ---- 占位图片配色 ---- */
.placeholder-img {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-family: var(--font-heading);
  font-size: var(--fs-small);
}

/* ---- Tab 切换（通用交互基础） ---- */
.tab-nav { display: flex; justify-content: center; gap: var(--spacing-sm); margin-bottom: var(--spacing-2xl); flex-wrap: wrap; }
.tab-btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 44px; padding: 10px 28px; font-size: var(--fs-small); font-family: var(--font-body); border: 1px solid var(--color-primary); background: transparent; color: var(--color-primary); border-radius: var(--border-radius); cursor: pointer; transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast); }
.tab-btn:hover { background: var(--color-primary-bg); }
.tab-btn.active,
.tab-btn[aria-selected="true"] { background: var(--color-primary); color: var(--color-white); }
.tab-btn-count {
  min-width: 20px;
  padding: 1px 6px;
  border-radius: 999px;
  background: var(--color-primary-bg);
  color: inherit;
  font-size: 10px;
  line-height: 1.5;
}
.tab-btn.active .tab-btn-count,
.tab-btn[aria-selected="true"] .tab-btn-count { background: rgba(255, 255, 255, 0.16); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* 分类页签：山海自然、城市漫游、宁波味道、名人文脉、非遗民俗共用。 */
.tab-nav--category {
  --category-tab-active: #173e4e;
  --category-tab-accent: var(--color-accent);
  display: grid;
  grid-template-columns: repeat(var(--category-tab-columns, 4), minmax(0, 1fr));
  gap: 12px;
  margin: 0 0 38px;
}

.tab-nav--columns-3 { --category-tab-columns: 3; }
.tab-nav--columns-4 { --category-tab-columns: 4; }

.tab-nav--category .tab-btn {
  position: relative;
  width: 100%;
  min-height: 64px;
  padding: 14px 18px;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--color-primary-dark) 28%, var(--color-border));
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.76);
  box-shadow: 0 5px 16px rgba(46, 110, 136, 0.055);
  color: var(--color-text);
  font-size: 14px;
  font-weight: 600;
}

.tab-nav--category .tab-btn::after {
  content: '';
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 4px;
  background: var(--category-tab-accent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.tab-nav--category .tab-btn:hover {
  border-color: var(--color-primary-dark);
  background: var(--color-white);
}

.tab-nav--category .tab-btn.active,
.tab-nav--category .tab-btn[aria-selected="true"] {
  border-color: var(--category-tab-active);
  background: var(--category-tab-active);
  box-shadow: 0 10px 24px rgba(23, 62, 78, 0.18);
  color: var(--color-white);
  font-weight: 700;
}

.tab-nav--category .tab-btn.active::after,
.tab-nav--category .tab-btn[aria-selected="true"]::after {
  opacity: 1;
}

.tab-nav--category .tab-btn-icon {
  flex: 0 0 auto;
  font-size: 18px;
}

.tab-nav--category .tab-btn-count {
  min-width: 25px;
  margin-left: 4px;
  padding: 2px 7px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--color-primary-dark) 12%, transparent);
  color: inherit;
  font-size: 10px;
  font-weight: 700;
  line-height: 1.5;
}

.tab-nav--category .tab-btn.active .tab-btn-icon,
.tab-nav--category .tab-btn[aria-selected="true"] .tab-btn-icon {
  color: var(--category-tab-accent);
}

.tab-nav--category .tab-btn.active .tab-btn-count,
.tab-nav--category .tab-btn[aria-selected="true"] .tab-btn-count {
  background: rgba(255, 255, 255, 0.14);
  color: var(--color-white);
}

/* ---- 页面加载 / 空数据 / 错误状态 ---- */
.ui-state {
  grid-column: 1 / -1;
  display: flex;
  min-height: 120px;
  padding: var(--spacing-xl);
  border: 1px dashed var(--color-border);
  border-radius: var(--border-radius-lg);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--spacing-sm);
  color: var(--color-text-secondary);
  text-align: center;
  background: rgba(255, 255, 255, 0.55);
}
.ui-state strong { color: var(--color-text); font-size: var(--fs-body); }
.ui-state--error { border-color: rgba(180, 68, 68, 0.35); }
.ui-state--error strong { color: #9d3f3f; }
.ui-state-action { margin-top: var(--spacing-sm); }
.ui-state-spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--color-primary-bg);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: ui-state-spin 0.8s linear infinite;
}
@keyframes ui-state-spin { to { transform: rotate(360deg); } }

/* ---- Markdown 行内代码 ---- */
.inline-code {
  display: inline;
  margin: 0 2px;
  padding: 0 1px 1px;
  border: 0;
  border-bottom: 1px dashed #c77b74;
  border-radius: 0;
  background: transparent;
  color: #a33a32;
  font: 600 0.9em/1.55 Consolas, "SFMono-Regular", Menlo, Monaco, "Microsoft YaHei", monospace;
  vertical-align: baseline;
}

/* ---- 详情页顶部白色信息卡：浅色顶栏标题 ---- */
body .spot-info-item,
body .dish-info-item,
body .detail-info-item {
  overflow: hidden;
}

body .spot-info-item .info-label,
body .dish-info-item .info-label,
body .detail-info-item .info-label {
  display: flex;
  width: calc(100% + 48px);
  align-items: center;
  justify-content: center;
  gap: 5px;
  margin: -16px -24px 14px;
  padding: 10px 16px;
  border-bottom: 0;
  background: #d8e4e1;
  color: #4d615d;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.02em;
}

@media (max-width: 767px) {
  body .spot-info-item .info-label,
  body .dish-info-item .info-label,
  body .detail-info-item .info-label {
    width: calc(100% + 32px);
    margin: -8px -16px 12px;
    padding: 8px 12px;
  }
}

/* ---- 地点详情页公共骨架（山海自然、城市漫游） ---- */
.place-detail-hero {
  position: relative;
  display: flex;
  height: 280px;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  color: var(--color-white);
  text-align: center;
}
.place-detail-hero::before {
  position: absolute;
  z-index: 1;
  inset: 0;
  background: linear-gradient(to bottom, rgba(0, 0, 0, .3), rgba(0, 0, 0, .7));
  content: '';
}
.place-detail-hero-content {
  position: relative;
  z-index: 2;
  padding-top: 72px;
}
.place-detail-hero h1 {
  margin-bottom: var(--spacing-sm);
  color: var(--color-white);
  font-size: 44px;
}
.place-detail-subtitle {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  opacity: .9;
}
.place-detail-info-bar {
  position: relative;
  z-index: 3;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-top: calc(-1 * var(--spacing-xl) - 12px);
  padding: var(--spacing-lg) 0;
}
.place-detail-info-bar .detail-info-item {
  min-width: 140px;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--border-radius);
  background: var(--color-white);
  box-shadow: var(--shadow-md);
  text-align: center;
}
.place-detail-info-bar .info-label {
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-light);
  font-size: var(--fs-xs);
}
.place-detail-info-bar .info-value {
  color: var(--color-text);
  font-size: var(--fs-small);
  font-weight: 600;
}
.place-detail-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px var(--page-gutter) var(--spacing-2xl);
}
.place-detail-content > h2,
.place-detail-text-section > h2 {
  display: inline-block;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--color-primary);
  font-size: var(--fs-h2);
}
.place-detail-description {
  margin-bottom: var(--spacing-2xl);
  color: var(--color-text);
  font-size: var(--fs-body);
  line-height: 2;
}
.place-detail-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: 30px;
}
.place-detail-tags .tag {
  padding: 4px 14px;
  font-size: var(--fs-small);
}
.place-detail-page .article-layout {
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 48px;
}
.place-detail-page .article-body > p:first-child {
  color: var(--color-text);
  font-size: 16px !important;
}
.place-detail-page .article-body h2 {
  display: block;
  margin: 48px 0 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
  font-size: 28px;
}
.place-detail-page .article-body h3 {
  margin: 34px 0 14px;
  padding-left: 12px;
  border-left: 3px solid var(--color-primary);
  font-size: 21px;
}
.place-detail-page .article-body h4 {
  margin: 26px 0 10px;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 700;
}
.place-detail-page .article-body p { line-height: 1.9; }
.place-detail-page .article-figure {
  max-width: 760px;
  margin: 30px auto;
}
.place-detail-page .article-figure img { max-height: 520px; }
.place-detail-page .article-sidebar { top: calc(var(--navbar-full-height, 116px) + 16px); }
.place-detail-page .article-toc {
  max-height: calc(100vh - var(--navbar-full-height, 116px) - 48px);
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
}
.place-detail-page .article-toc .toc-level-2 {
  color: var(--color-text);
  font-weight: 600;
}
.place-detail-page .article-toc .toc-level-3 {
  margin-left: 8px;
  padding-left: 12px;
  border-left: 1px solid var(--color-border);
}
.place-detail-image {
  max-height: 400px;
  margin-bottom: var(--spacing-2xl);
  overflow: hidden;
  border-radius: var(--border-radius-lg);
}
.place-detail-image[hidden] { display: none; }
.place-detail-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.place-detail-text-section[hidden] { display: none; }
.detail-text-section__body {
  margin-bottom: var(--spacing-2xl);
  color: var(--color-text);
  font-size: var(--fs-body);
  line-height: 2;
}
.place-detail-back {
  padding: var(--spacing-xl) 0 var(--spacing-3xl);
  text-align: center;
}

@media (max-width: 900px) {
  .place-detail-page .article-layout { grid-template-columns: 1fr; gap: 0; }
}

@media (max-width: 767px) {
  .place-detail-hero { height: 200px !important; }
  .place-detail-hero h1 { font-size: 24px !important; }
  .place-detail-subtitle {
    display: -webkit-box;
    max-width: calc(100% - 32px);
    margin-inline: auto;
    overflow: hidden;
    white-space: normal;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    line-height: 1.7;
  }
  .place-detail-info-bar { gap: var(--spacing-sm); }
  .place-detail-info-bar .detail-info-item {
    min-width: 100px;
    padding: var(--spacing-sm) var(--spacing-md);
  }
  .place-detail-content { padding: 20px var(--page-gutter) 40px; }
  .place-detail-page .article-body h2 { margin-top: 38px; font-size: 24px; }
  .place-detail-page .article-body h3 { margin-top: 28px; font-size: 19px; }
  .place-detail-page .article-body h4 { margin-top: 22px; font-size: 17px; }
  .place-detail-page .article-body p { line-height: 1.82; }
  .place-detail-page .article-figure { margin: 24px auto; }
}

/* ---- 详情页游玩信息（山海自然、城市漫游共用） ---- */
.detail-play-info {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-2xl);
}
.detail-play-info[hidden] { display: none; }
.detail-play-card {
  min-width: 0;
  padding: var(--spacing-lg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
}
.detail-play-card h4 {
  margin: 0 0 var(--spacing-sm);
  color: var(--color-primary);
  font-family: var(--font-body);
  font-size: 18px;
}
.detail-play-card p {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: var(--fs-body);
  line-height: 1.85;
  overflow-wrap: anywhere;
  white-space: pre-line;
}
.detail-play-card a:hover,
.detail-play-card a:focus-visible { text-decoration: underline; }
.detail-play-card.full { grid-column: 1 / -1; }
[data-detail-play-info-heading] {
  scroll-margin-top: calc(var(--navbar-full-height, 116px) + 16px);
}
.article-toc-toggle { display: none; }

@media (max-width: 900px) {
  .article-sidebar--collapsible { position: static; order: -1; margin-bottom: var(--spacing-lg); }
  .article-sidebar--collapsible .article-toc-toggle {
    display: flex;
    width: 100%;
    min-height: 44px;
    align-items: center;
    justify-content: space-between;
    padding: 12px 14px;
    border: 1px solid var(--color-border);
    border-radius: 10px;
    background: var(--color-white);
    color: var(--color-text);
    font: 600 14px/1.4 var(--font-body);
    cursor: pointer;
  }
  .article-sidebar--collapsible .article-toc-toggle::after {
    content: '展开';
    color: var(--color-primary);
    font-weight: 500;
  }
  .article-sidebar--collapsible .article-toc-toggle[aria-expanded="true"]::after { content: '收起'; }
  .article-sidebar--collapsible .article-toc {
    display: flex;
    max-height: 50vh;
    margin-top: var(--spacing-sm);
    overflow-y: auto;
    overscroll-behavior: contain;
  }
  .article-sidebar--collapsible .article-toc[hidden] { display: none; }
}

@media (max-width: 767px) {
  .detail-play-info { grid-template-columns: 1fr; }
  .detail-play-card.full { grid-column: auto; }
}

/* ---- 图片画廊（通用，供所有详情页共用） ---- */
.detail-gallery {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-2xl);
}

.detail-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  margin: 70px 0 var(--spacing-lg);
  padding: var(--spacing-md) 0;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-light);
  font-size: var(--fs-xs);
}
.detail-meta[hidden] { display: none; }
.detail-meta__link { color: inherit; font-weight: 400; text-decoration: none; }
.detail-meta__link::before { margin-right: 5px; content: '↗'; opacity: .72; font-size: .95em; }
.detail-meta__link:hover,
.detail-meta__link:focus-visible { text-decoration: underline; }
.detail-gallery .gallery-img-wrap {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 0;
  border-radius: var(--border-radius-lg);
  background: #e8efec;
  color: var(--color-white);
  cursor: zoom-in;
  scroll-snap-align: start;
  text-align: left;
}
.detail-gallery .gallery-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal), filter var(--transition-normal);
}
.detail-gallery .gallery-img-wrap:hover .gallery-img,
.detail-gallery .gallery-img-wrap:focus-visible .gallery-img {
  transform: scale(1.035);
  filter: brightness(0.9);
}
.detail-gallery .gallery-img-wrap:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
}
.gallery-open-hint {
  position: absolute;
  right: 12px;
  bottom: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(14, 38, 34, 0.78);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.gallery-img-wrap:hover .gallery-open-hint,
.gallery-img-wrap:focus-visible .gallery-open-hint {
  opacity: 1;
  transform: translateY(0);
}
.gallery-slide-count {
  display: none;
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(14, 38, 34, 0.72);
  color: #fff;
  font-size: 12px;
  line-height: 1.2;
}
.gallery-caption {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  padding: 32px 14px 12px;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.72));
  color: #fff;
  font-size: 13px;
  line-height: 1.45;
}
.gallery-more-count {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  background: rgba(14, 38, 34, 0.62);
  color: #fff;
  text-align: center;
}
.gallery-more-count strong { font-size: 26px; line-height: 1.1; }
.gallery-more-count span { font-size: 12px; }
.detail-gallery[data-count="1"] {
  grid-template-columns: minmax(0, 760px);
  justify-content: center;
}
.detail-gallery[data-count="2"] {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  max-width: 900px;
  margin-right: auto;
  margin-left: auto;
}
.detail-gallery[data-count="4"] {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  max-width: 900px;
  margin-right: auto;
  margin-left: auto;
}
.detail-gallery.is-mosaic {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  grid-template-rows: repeat(2, minmax(150px, 190px));
}
.detail-gallery.is-mosaic .gallery-img-wrap { aspect-ratio: auto; }
.detail-gallery.is-mosaic .gallery-img-wrap:first-child {
  grid-column: span 2;
  grid-row: span 2;
}
.detail-gallery.is-mosaic .gallery-img-wrap:nth-child(n + 6) { display: none; }
.detail-gallery.is-mosaic .gallery-img-wrap:nth-child(5) .gallery-open-hint { display: none; }

/* ---- 多图大图预览 ---- */
body.lightbox-open { overflow: hidden; }
.lightbox[hidden] { display: none; }
.lightbox {
  position: fixed;
  inset: 0;
  width: 100vw;
  z-index: 9999;
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) 72px;
  align-items: center;
  padding: 72px 24px 24px;
  background: rgba(4, 13, 12, 0.94);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.22s ease, visibility 0.22s ease;
}
.lightbox.active { opacity: 1; visibility: visible; }
.lightbox-toolbar {
  position: absolute;
  top: 16px;
  right: 20px;
  left: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #fff;
}
.lightbox-counter { font-size: 14px; font-variant-numeric: tabular-nums; }
.lightbox-zoom-controls { position: absolute; left: 50%; display: inline-flex; overflow: hidden; border: 1px solid rgba(255, 255, 255, .28); border-radius: 999px; background: rgba(0, 0, 0, .3); transform: translateX(-50%); }
.lightbox-zoom-controls[hidden] { display: none; }
.lightbox-zoom-controls button { display: grid; min-width: 44px; height: 44px; padding: 0 12px; place-items: center; border: 0; border-left: 1px solid rgba(255, 255, 255, .16); background: transparent; color: #fff; font-size: 20px; cursor: pointer; }
.lightbox-zoom-controls button:first-child { border-left: 0; }
.lightbox-zoom-controls button:hover { background: rgba(255, 255, 255, .14); }
.lightbox-zoom-controls button:focus-visible { position: relative; z-index: 1; outline: 2px solid #fff; outline-offset: -3px; }
.lightbox-zoom-controls button:disabled { color: rgba(255, 255, 255, .36); cursor: not-allowed; }
.lightbox-zoom-reset { min-width: 70px !important; font-size: 12px !important; font-variant-numeric: tabular-nums; }
.lightbox-stage {
  grid-column: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 0;
  height: 100%;
  margin: 0;
}
.lightbox.is-zoomable .lightbox-stage { overflow: hidden; }
.lightbox.is-zoomable .lightbox-image { touch-action: none; user-select: none; }
.lightbox.is-pannable .lightbox-image { cursor: grab; }
.lightbox.is-panning .lightbox-image { cursor: grabbing; transition: opacity .2s ease; }
.lightbox-image {
  display: block;
  max-width: 100%;
  max-height: calc(100vh - 140px);
  border-radius: var(--border-radius);
  box-shadow: 0 16px 50px rgba(0, 0, 0, 0.42);
  object-fit: contain;
  opacity: 0;
  transform: scale(0.985);
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.lightbox-image.is-loaded { opacity: 1; transform: scale(1); }
.lightbox.has-thumbnails .lightbox-image { max-height: calc(100vh - 230px); }
.lightbox-caption {
  max-width: 760px;
  margin-top: 12px;
  color: rgba(255, 255, 255, 0.86);
  font-size: 13px;
  line-height: 1.55;
  text-align: center;
}
.lightbox-thumbnails {
  display: flex;
  flex: 0 0 auto;
  gap: 8px;
  width: min(760px, 100%);
  margin-top: 14px;
  padding: 3px 2px 8px;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scroll-snap-type: inline proximity;
  scrollbar-color: rgba(255, 255, 255, .38) transparent;
  scrollbar-width: thin;
}
.lightbox-thumbnails[hidden] { display: none; }
.lightbox-thumbnail {
  flex: 0 0 72px;
  width: 72px;
  height: 56px;
  padding: 2px;
  overflow: hidden;
  border: 2px solid transparent;
  border-radius: 8px;
  background: rgba(255, 255, 255, .08);
  cursor: pointer;
  opacity: .62;
  scroll-snap-align: center;
  transition: border-color var(--transition-fast), background var(--transition-fast), opacity var(--transition-fast);
}
.lightbox-thumbnail img { display: block; width: 100%; height: 100%; border-radius: 4px; object-fit: cover; }
.lightbox-thumbnail:hover { background: rgba(255, 255, 255, .16); opacity: .9; }
.lightbox-thumbnail.active,
.lightbox-thumbnail[aria-selected="true"] { border-color: var(--color-accent); background: rgba(255, 255, 255, .18); opacity: 1; }
.lightbox-thumbnail:focus-visible { outline: 2px solid #fff; outline-offset: 2px; opacity: 1; }
.lightbox-close,
.lightbox-nav {
  border: 0;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}
.lightbox-close:hover,
.lightbox-nav:hover { background: rgba(255, 255, 255, 0.2); }
.lightbox-close:focus-visible,
.lightbox-nav:focus-visible { outline: 2px solid #fff; outline-offset: 3px; }
.lightbox-close {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: 30px;
  line-height: 1;
}
.lightbox-nav {
  width: 52px;
  height: 64px;
  border-radius: 12px;
  font-size: 46px;
  line-height: 1;
}
.lightbox-previous { grid-column: 1; }
.lightbox-next { grid-column: 3; }

@media (max-width: 767px) {
  .detail-meta { margin-top: 52px; }
  .detail-gallery,
  .detail-gallery[data-count],
  .detail-gallery.is-mosaic {
    display: grid;
    grid-template-columns: none !important;
    grid-template-rows: none;
    grid-auto-flow: column;
    grid-auto-columns: min(88%, 420px);
    gap: 12px;
    max-width: none;
    margin-right: -16px;
    padding: 3px 16px 12px 2px;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    scroll-snap-type: inline mandatory;
    scrollbar-width: none;
  }
  .detail-gallery::-webkit-scrollbar { display: none; }
  .detail-gallery.is-mosaic .gallery-img-wrap,
  .detail-gallery.is-mosaic .gallery-img-wrap:first-child,
  .detail-gallery.is-mosaic .gallery-img-wrap:nth-child(n + 6) {
    display: block;
    grid-column: auto;
    grid-row: auto;
    aspect-ratio: 4 / 3;
  }
  .detail-gallery .gallery-img { height: 100% !important; }
  .gallery-open-hint,
  .gallery-more-count,
  .gallery-caption { display: none; }
  .gallery-slide-count { display: block; }

  .lightbox {
    grid-template-columns: 1fr;
    padding: 70px 12px 82px;
  }
  .lightbox-stage { grid-column: 1; }
  .lightbox-image { max-height: calc(100vh - 180px); border-radius: 6px; }
  .lightbox.has-thumbnails .lightbox-image { max-height: calc(100vh - 255px); }
  .lightbox-thumbnails { width: 100%; margin-top: 10px; padding-bottom: 5px; }
  .lightbox-thumbnail { flex-basis: 64px; width: 64px; height: 48px; }
  .lightbox-zoom-controls { top: 0; }
  .lightbox-zoom-controls button { min-width: 40px; height: 44px; padding: 0 9px; }
  .lightbox-zoom-reset { min-width: 58px !important; }
  .lightbox-nav {
    position: absolute;
    bottom: 18px;
    width: 52px;
    height: 48px;
    border-radius: 999px;
    font-size: 38px;
  }
  .lightbox-previous { left: calc(50% - 66px); }
  .lightbox-next { right: calc(50% - 66px); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .fade-in,
  .card,
  .btn,
  .tab-btn,
  .ui-state-spinner,
  .detail-gallery .gallery-img,
  .gallery-open-hint,
  .lightbox,
  .lightbox-image,
  .lightbox-thumbnail,
  .nav-links,
  .nav-group-arrow {
    animation: none;
    transition: none;
  }
  .fade-in { opacity: 1; transform: none; }
}

/* ---- Tab 栏左右箭头滚动按钮 ---- */
.navbar-sub-inner {
  position: relative;
}
.sub-scroll-btn {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 44px;
  border: none;
  color: #fff;
  font-size: 22px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
  transition: opacity 0.2s;
  padding-bottom: 6px;
}
.sub-scroll-left {
  left: 0;
  background: linear-gradient(to right, rgba(46,110,136,0.95) 40%, transparent);
}
.sub-scroll-right {
  right: 0;
  background: linear-gradient(to left, rgba(46,110,136,0.95) 40%, transparent);
}
.navbar.scrolled .sub-scroll-left {
  background: linear-gradient(to right, rgba(255,255,255,0.95) 40%, transparent);
  color: var(--color-text);
}
.navbar.scrolled .sub-scroll-right {
  background: linear-gradient(to left, rgba(255,255,255,0.95) 40%, transparent);
  color: var(--color-text);
}