/* =============================================================
   寿光市人民政府门户网站（静态演示样板）
   文件：assets/css/layout.css
   职责：辅助工具条、门户页头、吸顶主导航（含下拉/移动菜单骨架）、
         面包屑、频道页头带、页脚、右侧悬浮工具组、栏目标题、
         网格与侧栏布局。
   依赖：tokens.css、base.css
   ============================================================= */

/* =============================================================
   1. 辅助工具条
   ============================================================= */
.util-bar {
  background: var(--c-gov-blue-deep);
  color: #C9D9E8;
  font-size: var(--fs-sm);
}
.util-bar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  min-height: 38px;
  gap: var(--sp-2) var(--sp-4);
  padding-top: 4px;
  padding-bottom: 4px;
}
.util-bar__left,
.util-bar__right {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--sp-2) var(--sp-4);
}
.util-bar a,
.util-bar button {
  color: #C9D9E8;
  font-size: var(--fs-sm);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-height: 30px;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}
.util-bar a:hover,
.util-bar button:hover {
  color: #FFFFFF;
  text-decoration: none;
  background: rgba(255, 255, 255, 0.12);
}
.util-bar__status {
  color: #9FB6CB;
}
.util-bar__divider {
  width: 1px;
  height: 14px;
  background: rgba(255, 255, 255, 0.25);
}
body.high-contrast .util-bar { background: #000; color: #fff; }
body.high-contrast .util-bar a,
body.high-contrast .util-bar button,
body.high-contrast .util-bar__status { color: #fff; }

/* =============================================================
   2. 门户页头（站标 + 搜问一体）
   ============================================================= */
.site-header {
  background:
    linear-gradient(135deg, var(--c-gov-blue) 0%, var(--c-gov-blue-dark) 62%, #0B4A45 100%);
  color: var(--c-text-invert);
  position: relative;
  overflow: hidden;
}
/* 寿光识别：温室弧线 + 叶脉抽象纹理（纯 CSS，克制使用） */
.site-header::before {
  content: "";
  position: absolute;
  right: -60px;
  top: -140px;
  width: 460px;
  height: 460px;
  border: 1.5px solid rgba(255, 255, 255, 0.10);
  border-radius: 50%;
  pointer-events: none;
}
.site-header::after {
  content: "";
  position: absolute;
  right: 80px;
  top: -40px;
  width: 300px;
  height: 300px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  pointer-events: none;
}
.site-header .container {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-5);
  padding-top: var(--sp-6);
  padding-bottom: var(--sp-6);
}
.site-brand {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  color: var(--c-text-invert);
  min-width: 0;
}
.site-brand:hover { text-decoration: none; color: var(--c-text-invert); }
.site-brand__logo {
  width: 58px;
  height: 58px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
}
.site-brand__logo img,
.site-brand__logo svg { width: 46px; height: 46px; }
.site-brand__name {
  font-size: var(--fs-2xl);
  font-weight: 700;
  letter-spacing: 2px;
  line-height: 1.2;
  margin: 0;
}
.site-brand__sub {
  display: block;
  font-size: var(--fs-sm);
  font-weight: 400;
  letter-spacing: 4px;
  color: rgba(255, 255, 255, 0.78);
  margin-top: 2px;
}
.site-brand__badge {
  display: inline-block;
  margin-left: var(--sp-2);
  padding: 1px 8px;
  font-size: var(--fs-xs);
  letter-spacing: 1px;
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: 999px;
  vertical-align: middle;
  color: rgba(255, 255, 255, 0.85);
}

/* 搜问一体复合入口 */
.site-search {
  flex: 1 1 380px;
  max-width: 560px;
  min-width: 260px;
}
.site-search__form {
  display: flex;
  background: #FFFFFF;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.site-search__input {
  flex: 1;
  min-width: 0;
  border: 0;
  padding: 0 var(--sp-4);
  min-height: var(--tap-min);
  font-size: var(--fs-base);
  color: var(--c-text);
}
.site-search__input::placeholder { color: var(--c-text-muted); }
.site-search__btn {
  flex: 0 0 auto;
  min-height: var(--tap-min);
  padding: 0 var(--sp-5);
  background: var(--c-gov-blue);
  color: #fff;
  font-size: var(--fs-base);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background var(--dur-fast) var(--ease);
}
.site-search__btn:hover { background: var(--c-gov-blue-light); }
.site-search__btn:active { background: var(--c-gov-blue-deep); }
.site-search__ask {
  flex: 0 0 auto;
  min-height: var(--tap-min);
  padding: 0 var(--sp-4);
  background: var(--c-sg-green);
  color: #fff;
  font-size: var(--fs-base);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background var(--dur-fast) var(--ease);
}
.site-search__ask:hover { background: var(--c-sg-green-dark); }
.site-search__hint {
  margin: var(--sp-2) 0 0;
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.78);
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2) var(--sp-3);
}
.site-search__hint a {
  color: rgba(255, 255, 255, 0.92);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.site-search__hint a:hover { color: #fff; }
body.high-contrast .site-header {
  background: #002244;
}

/* =============================================================
   3. 吸顶主导航
   ============================================================= */
.main-nav {
  background: var(--c-gov-blue);
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  box-shadow: 0 2px 6px rgba(7, 43, 74, 0.25);
}
.main-nav .container {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: var(--sp-3);
}
.main-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex: 1;
  min-width: 0;
}
.main-nav__item { position: relative; }
.main-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  min-height: var(--header-h);
  padding: 0 var(--sp-5);
  color: rgba(255, 255, 255, 0.92);
  font-size: var(--fs-base);
  font-weight: 600;
  border-bottom: 3px solid transparent;
  transition: background var(--dur-fast) var(--ease);
  white-space: nowrap;
}
.main-nav__link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.10);
  text-decoration: none;
}
.main-nav__link:focus-visible {
  outline-color: #fff;
  outline-offset: -4px;
}
.main-nav__link[aria-current="page"],
.main-nav__item.is-active > .main-nav__link {
  color: #fff;
  background: rgba(255, 255, 255, 0.14);
  border-bottom-color: var(--c-sg-green);
}
.main-nav__caret {
  width: 10px;
  height: 10px;
  flex: 0 0 auto;
  display: inline-block;
}
.main-nav__caret::before {
  content: "";
  display: block;
  width: 7px;
  height: 7px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  transition: transform var(--dur-fast) var(--ease);
}
.main-nav__item.is-open .main-nav__caret::before {
  transform: rotate(225deg) translateY(-1px);
}

/* 下拉菜单：由 JS 以 .is-open 控制（点击/回车/触控均可），
   同时保留 :focus-within 键盘兜底，不依赖 hover */
.main-nav__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 232px;
  background: #fff;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--c-border-light);
  border-top: 3px solid var(--c-sg-green);
  list-style: none;
  margin: 0;
  padding: var(--sp-2) 0;
  z-index: var(--z-dropdown);
  display: none;
}
.main-nav__item.is-open > .main-nav__dropdown { display: block; }
.main-nav__item:focus-within > .main-nav__dropdown { display: block; }
.main-nav__dropdown a {
  display: flex;
  align-items: center;
  min-height: var(--tap-min);
  padding: var(--sp-2) var(--sp-5);
  color: var(--c-text);
  font-size: var(--fs-base);
}
.main-nav__dropdown a:hover {
  background: var(--c-gov-blue-pale);
  color: var(--c-gov-blue-dark);
  text-decoration: none;
}
.main-nav__dropdown a.is-highlight {
  color: var(--c-gov-blue);
  font-weight: 700;
}
.main-nav__dropdown a.is-highlight::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-sg-green);
  margin-right: 8px;
  flex: 0 0 auto;
}

/* 移动菜单开关（<=1023px 显示，responsive.css 控制） */
.mobile-menu-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  min-height: var(--header-h);
  padding: 0 var(--sp-4);
  color: #fff;
  font-size: var(--fs-base);
  font-weight: 600;
}
.mobile-menu-toggle__icon {
  position: relative;
  width: 20px;
  height: 14px;
  flex: 0 0 auto;
}
.mobile-menu-toggle__icon::before,
.mobile-menu-toggle__icon::after,
.mobile-menu-toggle__icon span {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: #fff;
  border-radius: 2px;
}
.mobile-menu-toggle__icon::before { top: 0; }
.mobile-menu-toggle__icon span { top: 6px; display: block; }
.mobile-menu-toggle__icon::after { bottom: 0; }

/* 导航内快捷搜索（滚动后出现于吸顶条，桌面端） */
.main-nav__quick-search {
  display: none;
  align-items: center;
}
.main-nav.is-condensed .main-nav__quick-search { display: inline-flex; }
.main-nav__quick-search a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: var(--header-h);
  padding: 0 var(--sp-4);
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--fs-base);
}
.main-nav__quick-search a:hover { color: #fff; text-decoration: none; }

/* =============================================================
   4. 面包屑
   ============================================================= */
.breadcrumb {
  background: var(--c-bg);
  border-bottom: 1px solid var(--c-border-light);
}
.breadcrumb ol {
  list-style: none;
  margin: 0;
  padding: var(--sp-3) 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-1);
  font-size: var(--fs-sm);
}
.breadcrumb li {
  display: flex;
  align-items: center;
  margin: 0;
  color: var(--c-text-muted);
}
.breadcrumb li + li::before {
  content: "›";
  margin: 0 var(--sp-2);
  color: var(--c-border);
}
.breadcrumb a { color: var(--c-text-secondary); }
.breadcrumb a:hover { color: var(--c-gov-blue); }
.breadcrumb [aria-current="page"] {
  color: var(--c-text);
  font-weight: 600;
}

/* =============================================================
   5. 频道页头带
   ============================================================= */
.page-head {
  background:
    linear-gradient(120deg, var(--c-gov-blue-mist) 0%, #FFFFFF 55%, var(--c-sg-green-pale) 100%);
  border-bottom: 1px solid var(--c-border-light);
  padding: var(--sp-8) 0;
}
.page-head__title {
  margin: 0 0 var(--sp-2);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--sp-3);
}
.page-head__desc {
  margin: 0;
  max-width: 860px;
  color: var(--c-text-secondary);
}

/* =============================================================
   6. 栏目标题（频道内分区）
   ============================================================= */
.sec-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-3);
  margin-bottom: var(--sp-5);
  padding-bottom: var(--sp-3);
  border-bottom: 2px solid var(--c-border-light);
  position: relative;
}
.sec-head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 64px;
  height: 2px;
  background: var(--c-gov-blue);
}
.sec-head--green::after { background: var(--c-sg-green); }
.sec-head__title {
  margin: 0;
  font-size: var(--fs-xl);
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}
.sec-head__title .icon-chip { flex: 0 0 auto; }
.sec-head__more {
  font-size: var(--fs-base);
  color: var(--c-text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-height: 32px;
}
.sec-head__more:hover { color: var(--c-gov-blue); }
.sec-head__more::after { content: "→"; font-size: var(--fs-sm); }

/* =============================================================
   7. 网格与侧栏布局
   ============================================================= */
.grid {
  display: grid;
  gap: var(--sp-5);
}
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }

.layout-main-side {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: var(--sp-6);
  align-items: start;
}
.layout-side-main {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: var(--sp-6);
  align-items: start;
}

/* =============================================================
   8. 页脚
   ============================================================= */
.site-footer {
  background: var(--c-bg-footer);
  color: #B9C7D6;
  margin-top: var(--sp-12);
  font-size: var(--fs-sm);
}
.site-footer a { color: #D7E2EC; }
.site-footer a:hover { color: #fff; }
.site-footer__top {
  padding: var(--sp-8) 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}
.site-footer__cols {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: var(--sp-6);
}
.site-footer__col h4 {
  color: #fff;
  font-size: var(--fs-base);
  margin-bottom: var(--sp-3);
}
.site-footer__col ul { list-style: none; padding: 0; margin: 0; }
.site-footer__col li { margin-bottom: var(--sp-2); }
.site-footer__brandline {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-bottom: var(--sp-3);
}
.site-footer__brandline img,
.site-footer__brandline svg { width: 40px; height: 40px; }
.site-footer__brandname {
  font-size: var(--fs-lg);
  color: #fff;
  font-weight: 700;
  letter-spacing: 2px;
}
.site-footer__bottom {
  background: var(--c-bg-footer-deep);
  padding: var(--sp-4) 0;
}
.site-footer__bottom .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--sp-2) var(--sp-5);
}
.site-footer__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2) var(--sp-4);
  margin: 0;
  padding: 0;
  list-style: none;
}
.site-footer__pending {
  color: #8DA2B5;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.3);
  cursor: help;
}
.site-footer__privacy {
  margin-top: var(--sp-3);
  color: #8DA2B5;
  font-size: var(--fs-xs);
  line-height: 1.7;
}
/* 待接入的外部入口：不可点击说明态 */
.pending-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #8DA2B5;
  cursor: not-allowed;
}
.pending-link .status-badge { flex: 0 0 auto; }
body.high-contrast .site-footer { background: #000; }
body.high-contrast .site-footer__bottom { background: #000; border-top: 1px solid #fff; }

/* =============================================================
   9. 右侧悬浮工具组（菜小帮 / 寿欢迎 / 返回顶部 / 长者模式）
   ============================================================= */
.float-tools {
  position: fixed;
  right: 16px;
  bottom: 110px;
  z-index: var(--z-float);
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}
.float-tools__btn {
  width: 64px;
  min-height: 64px;
  padding: var(--sp-2) var(--sp-1);
  background: #fff;
  border: 1px solid var(--c-border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  color: var(--c-text-secondary);
  font-size: var(--fs-xs);
  line-height: 1.3;
  text-align: center;
  transition: transform var(--dur-fast) var(--ease),
              box-shadow var(--dur-fast) var(--ease),
              border-color var(--dur-fast) var(--ease);
}
.float-tools__btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--c-gov-blue-light);
  color: var(--c-gov-blue);
  text-decoration: none;
}
.float-tools__btn svg {
  width: 26px;
  height: 26px;
  flex: 0 0 auto;
}
.float-tools__btn--ai {
  border-color: var(--c-gov-blue);
  color: var(--c-gov-blue);
}
.float-tools__btn--service {
  border-color: var(--c-sg-green);
  color: var(--c-sg-green-dark);
}
.float-tools__btn--care {
  border-color: var(--c-warm);
  color: var(--c-warm-dark);
}
#backToTop {
  visibility: hidden;
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease),
              visibility var(--dur-base) var(--ease);
}
#backToTop.is-visible {
  visibility: visible;
  opacity: 1;
}
body.care-mode .float-tools__btn {
  width: 76px;
  min-height: 72px;
  font-size: var(--fs-sm);
}