/* Header — light formal tech */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  font-family: var(--header-font);
}
.site-header__bar {
  position: relative;
  height: var(--header-height);
  background: var(--header-bg);
  border-bottom: 1px solid var(--header-border);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.8);
  transition: background var(--transition), box-shadow var(--transition);
}
.site-header__tech-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.55;
  background:
    repeating-linear-gradient(
      90deg,
      rgba(15, 23, 42, 0.025) 0,
      rgba(15, 23, 42, 0.025) 1px,
      transparent 1px,
      transparent 64px
    ),
    repeating-linear-gradient(
      0deg,
      rgba(15, 23, 42, 0.02) 0,
      rgba(15, 23, 42, 0.02) 1px,
      transparent 1px,
      transparent 64px
    );
}
.site-header.is-scrolled .site-header__bar {
  background: var(--header-bg-scrolled);
  box-shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
}
.site-header__inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 16px;
  max-width: var(--container-max);
}
.site-header__logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}
.site-header__logo img {
  display: block;
  height: 34px;
  width: auto;
  max-width: none;
  object-fit: contain;
  vertical-align: middle;
}

/* 导航容器：桌面 inline flex，移动抽屉由 media query 覆盖 */
.site-nav-panel {
  display: flex;
  flex: 1;
  min-width: 0;
  justify-content: center;
}
.site-nav-panel__head {
  display: none;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  min-width: 0;
  flex-wrap: nowrap;
  font-family: inherit;
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-nav > li {
  position: relative;
  flex-shrink: 0;
}
.site-nav > li > a,
.site-nav__item-row > a {
  display: flex;
  align-items: center;
  height: var(--header-height);
  padding: 0 var(--header-nav-padding-x);
  font-size: var(--header-nav-size);
  font-weight: var(--header-nav-weight);
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
  letter-spacing: normal;
  color: var(--header-text);
  white-space: nowrap;
  position: relative;
  transition: color 0.2s, background 0.2s;
}
.site-nav__has-sub > a::after,
.site-nav__has-mega > a::after,
.site-nav__has-sub .site-nav__item-row > a::after,
.site-nav__has-mega .site-nav__item-row > a::after {
  content: '';
  display: inline-block;
  width: 0;
  height: 0;
  margin-left: 6px;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  opacity: 0.35;
  transform: translateY(1px);
  transition: opacity 0.2s, transform 0.2s;
}
.site-nav__has-sub:hover > a::after,
.site-nav__has-mega:hover > a::after,
.site-nav__has-sub:hover .site-nav__item-row > a::after,
.site-nav__has-mega:hover .site-nav__item-row > a::after,
.site-nav__has-sub.is-open > a::after,
.site-nav__has-mega.is-open > a::after,
.site-nav__has-sub.is-open .site-nav__item-row > a::after,
.site-nav__has-mega.is-open .site-nav__item-row > a::after {
  opacity: 0.65;
  transform: translateY(2px);
}

/* 桌面端：item-row 与链接同行，保持 li 结构完整 */
.site-nav__item-row {
  display: flex;
  align-items: center;
  height: var(--header-height);
}
.site-nav__expand {
  display: none;
}
.site-nav__mobile-actions,
.site-nav__mobile-backdrop,
.site-nav__mobile-panel {
  display: none;
}

.site-nav > li > a::before,
.site-nav__item-row > a::before {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 0;
  height: 3px;
  background: var(--header-nav-indicator);
  border-radius: 3px 3px 0 0;
  transform: translateX(-50%);
  transition: width 0.25s ease;
}
.site-nav > li:hover > a::before,
.site-nav__has-sub:hover > a::before,
.site-nav__has-sub:hover .site-nav__item-row > a::before,
.site-nav__has-mega:hover > a::before,
.site-nav__has-mega:hover .site-nav__item-row > a::before,
.site-nav__has-sub.is-open > a::before,
.site-nav__has-sub.is-open .site-nav__item-row > a::before,
.site-nav__has-mega.is-open > a::before,
.site-nav__has-mega.is-open .site-nav__item-row > a::before {
  width: calc(100% - 16px);
}
.site-nav > li > a:hover,
.site-nav > li:hover > a,
.site-nav__has-sub:hover > a,
.site-nav__has-sub:hover .site-nav__item-row > a,
.site-nav__has-mega:hover > a,
.site-nav__has-mega:hover .site-nav__item-row > a,
.site-nav__has-sub.is-open > a,
.site-nav__has-sub.is-open .site-nav__item-row > a,
.site-nav__has-mega.is-open > a,
.site-nav__has-mega.is-open .site-nav__item-row > a {
  color: var(--header-panel-accent);
  background: var(--header-nav-hover-bg);
}

/* Dropdown */
.site-nav__dropdown {
  position: absolute;
  top: calc(100% + 1px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  min-width: 240px;
  padding: 8px 0;
  background: var(--header-panel-bg);
  border: 1px solid var(--header-panel-border);
  border-radius: 0 0 10px 10px;
  box-shadow: 0 12px 40px rgba(15, 23, 42, 0.08);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.2s, visibility 0.2s, transform 0.2s;
  z-index: 1001;
}
.site-nav__has-sub:hover .site-nav__dropdown:not(.site-nav__dropdown--mobile),
.site-nav__dropdown:not(.site-nav__dropdown--mobile):hover {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.site-nav__dropdown a {
  display: block;
  padding: 10px 20px;
  color: var(--header-panel-text);
  font-size: 13px;
  line-height: 1.5;
  white-space: nowrap;
  transition: color 0.2s, background 0.2s;
}
.site-nav__dropdown a:hover {
  color: var(--header-panel-accent);
  background: var(--header-panel-hover);
}
.site-nav__dropdown--mobile {
  display: none;
}

/* Mega menu */
.site-header__mega-layer {
  position: relative;
  z-index: 1001;
  pointer-events: none;
  font-family: var(--header-font);
}
.site-nav__mega {
  position: fixed;
  left: 0;
  right: 0;
  top: var(--header-height);
  z-index: 1001;
  background: var(--header-panel-bg);
  box-shadow: 0 16px 48px rgba(15, 23, 42, 0.08);
  border-top: 1px solid var(--header-panel-border);
  padding: 28px 0 36px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.22s, visibility 0.22s;
  max-height: calc(100vh - var(--header-height));
  overflow: hidden;
}
.site-nav__mega::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: -16px;
  height: 16px;
}
.site-header:has(.site-nav__has-mega[data-mega="mega-fly"]:hover) #mega-fly,
.site-header:has(#mega-fly:hover) #mega-fly,
.site-header:has(.site-nav__has-mega[data-mega="mega-marketplace"]:hover) #mega-marketplace,
.site-header:has(#mega-marketplace:hover) #mega-marketplace {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}
.site-nav__mega .sub-block-wrap {
  display: flex;
  flex-wrap: nowrap;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}
.site-nav__mega .left-cont {
  width: 320px;
  flex-shrink: 0;
  padding: 28px 28px;
  margin-right: 24px;
  background: var(--header-panel-side);
  border: 1px solid var(--header-panel-border);
  border-radius: var(--radius-md);
}
.site-nav__mega .left-cont .h2 {
  font-size: 22px;
  line-height: 1.45;
  color: var(--header-panel-title);
  margin: 0;
  font-weight: 700;
  letter-spacing: 0.01em;
}
.site-nav__mega .left-cont .h2 a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: inherit;
}
.site-nav__mega .left-cont .h2 a:hover {
  color: var(--header-panel-accent);
  opacity: 1;
}
.site-nav__mega .left-cont .h2 .jt1 {
  display: inline-flex;
  width: 24px;
  height: 8px;
}
.site-nav__mega .left-cont .h2 .jt1 svg { width: 100%; height: 100%; fill: currentColor; }
.site-nav__mega .left-cont .word {
  margin-top: 14px;
  line-height: 1.85;
  color: var(--header-panel-text);
  font-size: 15px;
}
.site-nav__mega .left-cont .word p {
  margin: 0 0 0.75em;
}
.site-nav__mega .left-cont .word p:last-child {
  margin-bottom: 0;
}
.site-nav__mega .right-cont {
  flex: 1;
  min-width: 0;
  padding-left: 4px;
  max-height: calc(100vh - var(--header-height) - 88px);
  overflow-y: auto;
}
.site-nav__mega .dl-box {
  display: flex;
  flex-wrap: wrap;
}
.site-nav__mega .dl {
  width: 25%;
  padding: 0 16px 0 0;
  margin-top: 24px;
}
.site-nav__mega .dl:nth-child(-n+4) { margin-top: 0; }
.site-nav__mega .dl .dt {
  margin-bottom: 10px;
  padding-bottom: 10px;
  font-size: 16px;
  line-height: 1.45;
  color: var(--header-panel-title);
  font-weight: 700;
  border-bottom: 1px solid var(--header-panel-border);
}
.site-nav__mega .dl .dt a { color: inherit; }
.site-nav__mega .dl .dt a:not([href]),
.site-nav__mega .dl .dt a[href=""] { pointer-events: none; }
.site-nav__mega .dl .dd {
  padding: 4px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.site-nav__mega .dl .dd a {
  color: var(--header-panel-text);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.5;
  transition: color 0.2s, font-weight 0.2s;
  flex: 1;
  min-width: 0;
}
.site-nav__mega .dl .dd a:hover {
  color: var(--header-panel-accent);
  font-weight: 600;
}
.site-nav__mega .dl .dd .hot {
  flex-shrink: 0;
  width: 28px;
  height: 14px;
  background: url("https://home-page-files.oss-cn-beijing.aliyuncs.com/site-v2/images/hot.svg?v=609d0ee59628") no-repeat center / contain;
  font-size: 0;
  color: transparent;
}

/* 无人机巡检算法 — 简洁布局，加大列/行间距 */
#mega-fly.site-nav__mega--fly {
  padding: 36px 0 44px;
}
#mega-fly .sub-block-wrap {
  gap: 40px;
  padding: 0 32px;
}
#mega-fly .left-cont {
  width: 300px;
  margin-right: 0;
}
#mega-fly .right-cont {
  padding-left: 40px;
  border-left: 1px solid var(--header-panel-border);
}
#mega-fly .dl-box {
  display: flex;
  flex-wrap: wrap;
  gap: 44px 40px;
}
#mega-fly .dl {
  width: calc(25% - 30px);
  margin: 0 !important;
  padding: 0;
  border: none;
  background: none;
  box-shadow: none;
}
#mega-fly .dl:hover {
  background: none;
  border: none;
  box-shadow: none;
}
#mega-fly .dl .dt {
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--header-panel-border);
}
#mega-fly .dl .dt::before {
  display: none;
}
#mega-fly .dl .dd {
  padding: 6px 0;
}
#mega-fly .dl .dd a {
  padding: 0;
  border-radius: 0;
  background: none;
}
#mega-fly .dl .dd a:hover {
  background: none;
  padding-left: 0;
}

@media (max-width: 1366px) {
  #mega-fly .dl {
    width: calc(33.333% - 27px);
  }
  #mega-fly .dl-box {
    gap: 40px 36px;
  }
}

@media (max-width: 1200px) {
  #mega-fly .dl {
    width: calc(33.333% - 24px);
  }
  #mega-fly .right-cont {
    padding-left: 28px;
  }
  #mega-fly .dl-box {
    gap: 36px 28px;
  }
}

/* Sub panels (type-b / type-c / type-d from legacy header) */
.site-header__sub-layer {
  position: relative;
  z-index: 1001;
  pointer-events: none;
  font-family: var(--header-font);
}
.site-nav__sub {
  position: fixed;
  left: 0;
  right: 0;
  top: var(--header-height);
  z-index: 1001;
  background: var(--header-panel-bg);
  box-shadow: 0 16px 48px rgba(15, 23, 42, 0.08);
  border-top: 1px solid var(--header-panel-border);
  padding: 32px 0 36px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.22s, visibility 0.22s;
  max-height: calc(100vh - var(--header-height));
  overflow: auto;
}
.site-nav__sub::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: -16px;
  height: 16px;
}
.site-header.is-sub-open .site-nav__sub.is-open,
.site-header:has(.site-nav__has-sub[data-sub="sub-custom"]:hover) #sub-custom,
.site-header:has(#sub-custom:hover) #sub-custom,
.site-header:has(.site-nav__has-sub[data-sub="sub-llm"]:hover) #sub-llm,
.site-header:has(#sub-llm:hover) #sub-llm,
.site-header:has(.site-nav__has-sub[data-sub="sub-products"]:hover) #sub-products,
.site-header:has(#sub-products:hover) #sub-products,
.site-header:has(.site-nav__has-sub[data-sub="sub-solutions"]:hover) #sub-solutions,
.site-header:has(#sub-solutions:hover) #sub-solutions,
.site-header:has(.site-nav__has-sub[data-sub="sub-about"]:hover) #sub-about,
.site-header:has(#sub-about:hover) #sub-about {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}
.site-nav__sub .sub-block-wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px 32px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 32px;
  pointer-events: auto;
}
.site-nav__sub .dl { margin: 0; flex: 0 0 auto; }
.site-nav__sub .dl .dt {
  margin: 0 0 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--header-panel-title);
}
.site-nav__sub .dl .dt a {
  color: inherit;
  pointer-events: auto;
}
.site-nav__sub .dl .dt a:hover { color: var(--header-panel-accent); }
.site-nav__sub .dl .dd { margin: 0; }
.site-nav__sub .dl .dd a {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  box-sizing: border-box;
  padding: 18px 22px;
  min-width: 320px;
  border: 1px solid var(--header-panel-border);
  border-radius: 12px;
  background: #fff;
  color: var(--header-panel-text);
  text-decoration: none;
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s, color 0.2s, transform 0.2s;
}
.site-nav__sub .dl .dd a:hover {
  border-color: rgba(37, 99, 235, 0.25);
  box-shadow: 0 10px 32px rgba(37, 99, 235, 0.1);
  color: var(--header-panel-accent);
  transform: translateY(-2px);
}
.site-nav__sub .dl .dd .ico {
  flex-shrink: 0;
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.site-nav__sub .dl .dd .ico img {
  display: block;
  width: 64px;
  height: 64px;
  object-fit: contain;
}
.site-nav__sub .dl .dd .cont { min-width: 0; }
.site-nav__sub .dl .dd .tit {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--header-panel-title);
  white-space: nowrap;
}
.site-nav__sub .dl .dd .des {
  margin: 6px 0 0;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--header-panel-text);
}
#sub-custom .dl .dt,
#sub-about .dl .dt,
#sub-llm .dl .dt,
#sub-products .dl .dt { display: none; }
#sub-custom .sub-block-wrap--row,
#sub-about .sub-block-wrap--row,
#sub-llm .sub-block-wrap--row,
#sub-products .sub-block-wrap--row {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  justify-content: center;
  align-items: flex-start;
}
#sub-custom .dl--row,
#sub-about .dl--row,
#sub-llm .dl--row,
#sub-products .dl--row {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: stretch;
  justify-content: center;
  gap: 28px 32px;
  margin: 0;
  width: auto;
  max-width: 100%;
}
#sub-custom .dl--row .dd,
#sub-about .dl--row .dd,
#sub-llm .dl--row .dd,
#sub-products .dl--row .dd {
  flex: 0 0 auto;
  margin: 0;
}
#sub-llm .dl--row .dd a {
  min-width: 300px;
}
#sub-products .dl--row .dd a {
  min-width: 280px;
}
/* 行业方案 · 左侧引导 + 分组卡片网格 */
#sub-solutions.site-nav__sub {
  padding: 28px 0 32px;
  background:
    radial-gradient(ellipse 70% 80% at 12% 20%, rgba(8, 145, 178, 0.08), transparent 55%),
    radial-gradient(ellipse 60% 70% at 88% 80%, rgba(37, 99, 235, 0.07), transparent 50%),
    var(--header-panel-bg);
}
#sub-solutions .sub-solutions-wrap {
  display: grid;
  grid-template-columns: minmax(200px, 240px) minmax(0, 1fr);
  gap: 28px 36px;
  align-items: start;
  justify-content: stretch;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 clamp(20px, 3vw, 40px);
}
#sub-solutions .sub-solutions__lead {
  position: relative;
  padding: 20px 22px;
  border-radius: 14px;
  background: linear-gradient(155deg, #0f172a 0%, #1e3a5f 55%, #0f172a 100%);
  border: 1px solid rgba(56, 189, 248, 0.22);
  box-shadow: 0 12px 36px rgba(15, 23, 42, 0.12);
}
#sub-solutions .sub-solutions__lead::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background:
    linear-gradient(rgba(56, 189, 248, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, 0.06) 1px, transparent 1px);
  background-size: 20px 20px;
  mask-image: linear-gradient(180deg, #000 0%, transparent 85%);
  pointer-events: none;
}
#sub-solutions .sub-solutions__eyebrow {
  display: inline-block;
  margin-bottom: 10px;
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(125, 211, 252, 0.95);
  background: rgba(37, 99, 235, 0.2);
  border: 1px solid rgba(56, 189, 248, 0.28);
  border-radius: 999px;
}
#sub-solutions .sub-solutions__title {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.35;
  color: #f8fafc;
}
#sub-solutions .sub-solutions__desc {
  margin: 0 0 16px;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(148, 163, 184, 0.95);
}
#sub-solutions .sub-solutions__more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: #7dd3fc;
  text-decoration: none;
  transition: color 0.2s, gap 0.2s;
}
#sub-solutions .sub-solutions__more::after {
  content: '→';
  transition: transform 0.2s;
}
#sub-solutions .sub-solutions__more:hover {
  color: #bae6fd;
  gap: 10px;
}
#sub-solutions .sub-solutions__more:hover::after {
  transform: translateX(3px);
}
#sub-solutions .sub-solutions__main {
  display: flex;
  flex-direction: column;
  gap: 22px;
  min-width: 0;
}
#sub-solutions .sub-solutions__group {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px 16px;
  width: 100%;
  margin: 0;
}
#sub-solutions .sub-solutions__group .dt {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 2px;
  padding: 0 2px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--header-panel-title);
}
#sub-solutions .sub-solutions__group .dt::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, rgba(37, 99, 235, 0.25), transparent);
}
#sub-solutions .sub-solutions__group .dd {
  margin: 0;
  min-width: 0;
}
#sub-solutions .sub-solutions__group .dd a {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  min-width: 0;
  height: 100%;
  padding: 14px 14px 14px 12px;
  border: 1px solid var(--header-panel-border);
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}
#sub-solutions .sub-solutions__group .dd a:hover {
  border-color: rgba(8, 145, 178, 0.35);
  box-shadow: 0 10px 28px rgba(8, 145, 178, 0.12);
  transform: translateY(-2px);
}
#sub-solutions .sub-solutions__group .ico {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
}
#sub-solutions .sub-solutions__group .ico img {
  width: 52px;
  height: 52px;
}
#sub-solutions .sub-solutions__group .cont {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}
#sub-solutions .sub-solutions__group .tit {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--header-panel-title);
  white-space: normal;
}
#sub-solutions .sub-solutions__group .des {
  margin: 0;
  font-size: 12px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--header-panel-text);
}
#sub-solutions .tags.hot {
  display: inline-block;
  padding: 1px 7px;
  font-size: 10px;
  font-weight: 600;
  line-height: 1.5;
  color: #fff;
  background: linear-gradient(135deg, #f97316, #ef4444);
  border-radius: 999px;
  vertical-align: middle;
  letter-spacing: 0.02em;
}
#sub-solutions .sub-solutions__group:nth-child(2) .dd a:hover {
  border-color: rgba(37, 99, 235, 0.32);
  box-shadow: 0 10px 28px rgba(37, 99, 235, 0.1);
}

@media (max-width: 1200px) {
  #sub-solutions .sub-solutions-wrap {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  #sub-solutions .sub-solutions__lead {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    gap: 8px 20px;
    align-items: center;
  }
  #sub-solutions .sub-solutions__eyebrow {
    grid-column: 1;
    margin: 0;
  }
  #sub-solutions .sub-solutions__title {
    grid-column: 1;
    margin: 0;
    font-size: 18px;
  }
  #sub-solutions .sub-solutions__desc {
    grid-column: 1 / -1;
    margin: 0;
  }
  #sub-solutions .sub-solutions__more {
    grid-column: 2;
    grid-row: 1 / span 2;
    align-self: center;
  }
  #sub-solutions .sub-solutions__group {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 992px) {
  #sub-solutions .sub-solutions__group {
    grid-template-columns: 1fr;
  }
}

.site-header.is-mega-open .site-nav__mega.is-open,
.site-header.is-sub-open .site-nav__sub.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.site-header__actions {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}
.site-header__actions .btn--header {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 120px;
  height: 42px;
  padding: 0 24px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: #fff;
  background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
  border: none;
  border-radius: 8px;
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.28);
}
.site-header__actions .btn--header:hover {
  background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}
.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--header-text);
  transition: var(--transition);
}

@media (min-width: 993px) {
  .menu-toggle { display: none !important; }
  .site-nav-panel {
    display: flex !important;
    position: static;
    transform: none;
    visibility: visible;
    pointer-events: auto;
    background: transparent;
    box-shadow: none;
    overflow: visible;
  }
  .site-nav-panel__head { display: none !important; }
  .site-nav {
    display: flex !important;
    position: static;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    height: auto;
    width: auto;
    padding: 0;
    overflow: visible;
    background: transparent;
    box-shadow: none;
  }
  .site-nav__expand { display: none !important; }
  .site-nav__mobile-actions,
  .site-nav__mobile-backdrop,
  .site-nav__mobile-panel,
  .site-nav__dropdown--mobile { display: none !important; }
  .site-header__inner {
    max-width: 100%;
    padding: 0 clamp(16px, 2vw, 40px);
  }
}

@media (min-width: 1500px) {
  :root {
    --header-nav-size: var(--header-nav-size-lg);
    --header-nav-padding-x: 14px;
  }
}

@media (max-width: 1366px) {
  :root {
    --header-nav-size: 15px;
    --header-nav-padding-x: 10px;
  }
  .site-header__logo img { height: 30px; width: auto; }
}

@media (max-width: 1200px) {
  :root {
    --header-nav-size: 15px;
    --header-nav-padding-x: 8px;
  }
  .site-nav__mega .dl { width: 33.333%; }
  .site-nav__mega .dl:nth-child(-n+3) { margin-top: 0; }
  .site-nav__mega .dl:nth-child(4) { margin-top: 24px; }
  .site-nav__sub .dl .dd a { min-width: 280px; padding: 16px 18px; }
  .site-nav__sub .dl .dd .tit { font-size: 17px; }
}

@media (max-width: 992px) {
  .menu-toggle {
    display: flex;
    margin-left: auto;
    z-index: 1003;
  }
  .site-header__mega-layer { display: none; }
  .site-header__sub-layer { display: none; }
  .site-header__actions { display: none; }

  /* 移动抽屉：独立于 header bar 的 fixed 层 */
  .site-nav-panel {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(100vw, 380px);
    max-width: 100%;
    z-index: 1002;
    flex-direction: column;
    background: var(--color-bg-dark);
    box-shadow: -8px 0 40px rgba(0, 0, 0, 0.25);
    visibility: hidden;
    transform: translateX(100%);
    transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1), visibility 0.28s;
    pointer-events: none;
    overflow: hidden;
  }
  .site-nav-panel.is-open {
    display: flex;
    flex-direction: column;
    height: 100dvh;
    max-height: 100dvh;
    visibility: visible;
    transform: translateX(0);
    pointer-events: auto;
  }

  /* 抽屉在 inner(z-index:2) 内，须抬高 stacking context，否则会被 backdrop(1001) 挡住点击 */
  .site-header.is-mobile-nav-open .site-header__inner {
    z-index: 1003;
  }

  .site-nav-panel__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
    position: sticky;
    top: 0;
    z-index: 4;
    height: var(--header-height);
    padding: 0 16px 0 20px;
    padding-top: env(safe-area-inset-top, 0);
    min-height: calc(var(--header-height) + env(safe-area-inset-top, 0));
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    background: var(--color-bg-dark);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
  }
  .site-nav-panel__title {
    font-size: 17px;
    font-weight: 500;
    color: #fff;
    letter-spacing: 0.01em;
  }
  .site-nav-panel__close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    color: rgba(255, 255, 255, 0.85);
    font-size: 28px;
    line-height: 1;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    transition: background 0.2s;
  }
  .site-nav-panel__close:hover,
  .site-nav-panel__close:active {
    background: rgba(255, 255, 255, 0.08);
  }

  .site-nav {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
    padding: 4px 0 calc(24px + env(safe-area-inset-bottom, 0));
    touch-action: pan-y;
  }

  .site-nav__mobile-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.5);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.28s, visibility 0.28s;
    z-index: 1001;
  }
  .site-header.is-mobile-nav-open .site-nav__mobile-backdrop {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  body.site-nav-open {
    overflow: hidden;
    overscroll-behavior: none;
  }

  .site-nav > li {
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }
  .site-nav > li:last-child {
    border-bottom: none;
  }

  .site-nav__item-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4px;
    height: auto;
    min-height: 52px;
  }

  .site-nav > li > a,
  .site-nav__item-row > a {
    flex: 1;
    color: #f1f5f9;
    height: auto;
    min-height: 52px;
    padding: 14px 20px;
    font-size: 15px;
    font-weight: 500;
    font-synthesis: none;
    white-space: normal;
    background: transparent;
  }
  .site-nav > li > a:active,
  .site-nav__item-row > a:active {
    background: rgba(255, 255, 255, 0.06);
  }
  .site-nav__has-sub.is-open .site-nav__item-row > a,
  .site-nav__has-mega.is-open .site-nav__item-row > a,
  .site-nav__has-sub:hover .site-nav__item-row > a,
  .site-nav__has-mega:hover .site-nav__item-row > a {
    color: #f1f5f9;
    background: transparent;
  }
  .site-nav__has-sub.is-expanded .site-nav__item-row > a,
  .site-nav__has-mega.is-expanded .site-nav__item-row > a {
    color: #fff;
    font-weight: 600;
    background: transparent;
  }
  .site-nav__item-row > a::after,
  .site-nav > li > a::before {
    display: none;
  }

  .site-nav__expand {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    margin-right: 10px;
    padding: 0;
    border: none;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.06);
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    transition: background 0.2s, transform 0.2s;
  }
  .site-nav__expand:active {
    background: rgba(255, 255, 255, 0.12);
  }
  .site-nav__expand::before {
    content: '';
    width: 8px;
    height: 8px;
    border-right: 2px solid rgba(255, 255, 255, 0.75);
    border-bottom: 2px solid rgba(255, 255, 255, 0.75);
    transform: rotate(45deg);
    transition: transform 0.22s;
    margin-top: -3px;
  }
  .site-nav__has-sub.is-expanded .site-nav__expand::before,
  .site-nav__has-mega.is-expanded .site-nav__expand::before {
    transform: rotate(-135deg);
    margin-top: 3px;
  }

  /* 覆盖桌面 .site-nav__dropdown 白底/hover，与 mega 子面板统一深色样式 */
  .site-nav__dropdown.site-nav__dropdown--mobile {
    display: none;
    position: static !important;
    top: auto !important;
    left: auto !important;
    transform: none !important;
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
    min-width: 0;
    width: auto;
    height: auto;
    min-height: 0;
    border: none !important;
    box-shadow: none !important;
    transition: none;
    z-index: auto;
    padding: 8px 12px 12px 16px;
    margin: 0 12px 10px;
    background: rgba(15, 23, 42, 0.55) !important;
    border-left: 3px solid var(--color-primary) !important;
    border-radius: 0 8px 8px 0;
  }
  .site-nav__mobile-panel {
    display: none;
    padding: 8px 12px 12px 16px;
    margin: 0 12px 10px;
    background: rgba(15, 23, 42, 0.55);
    border: none;
    border-left: 3px solid var(--color-primary);
    border-radius: 0 8px 8px 0;
  }
  .site-nav__has-sub.is-expanded,
  .site-nav__has-mega.is-expanded {
    display: flex;
    flex-direction: column;
    overflow: visible;
  }
  .site-nav__has-sub.is-expanded > .site-nav__item-row,
  .site-nav__has-mega.is-expanded > .site-nav__item-row {
    position: sticky;
    top: 0;
    z-index: 3;
    flex-shrink: 0;
    background: var(--color-bg-dark);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
  }

  .site-nav__has-sub.is-expanded > .site-nav__dropdown.site-nav__dropdown--mobile {
    display: block !important;
    flex: 0 0 auto;
    height: auto;
    max-height: min(52vh, 360px);
    overflow-y: auto;
    overflow-x: hidden;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-y;
    animation: navSubFade 0.22s ease;
  }
  .site-nav__has-mega.is-expanded > .site-nav__mobile-panel {
    display: block !important;
    flex: 0 0 auto;
    height: auto;
    max-height: min(52vh, 360px);
    overflow-y: auto;
    overflow-x: hidden;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-y;
    animation: navSubSlide 0.22s ease;
  }
  @keyframes navSubFade {
    from { opacity: 0; }
    to { opacity: 1; }
  }
  @keyframes navSubSlide {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .site-nav__dropdown--mobile a,
  .site-nav__dropdown.site-nav__dropdown--mobile a,
  .site-nav__mobile-panel a {
    display: block;
    color: rgba(255, 255, 255, 0.88) !important;
    background: transparent !important;
    padding: 11px 10px;
    margin: 0;
    font-size: 14px;
    font-weight: 500;
    line-height: 1.5;
    white-space: normal;
    border: none !important;
    border-radius: 6px;
    box-shadow: none !important;
    -webkit-tap-highlight-color: transparent;
    transition: color 0.2s, background 0.2s;
  }
  .site-nav__dropdown--mobile a:hover,
  .site-nav__dropdown--mobile a:active,
  .site-nav__dropdown--mobile a:focus,
  .site-nav__dropdown--mobile a:focus-visible,
  .site-nav__dropdown.site-nav__dropdown--mobile a:hover,
  .site-nav__dropdown.site-nav__dropdown--mobile a:active,
  .site-nav__dropdown.site-nav__dropdown--mobile a:focus,
  .site-nav__dropdown.site-nav__dropdown--mobile a:focus-visible,
  .site-nav__mobile-panel a:hover,
  .site-nav__mobile-panel a:active,
  .site-nav__mobile-panel a:focus,
  .site-nav__mobile-panel a:focus-visible {
    color: #fff !important;
    background: rgba(255, 255, 255, 0.1) !important;
    outline: none;
  }
  .site-nav__dropdown--mobile a + a,
  .site-nav__dropdown.site-nav__dropdown--mobile a + a {
    margin-top: 2px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 0;
    padding-top: 12px;
  }
  .site-nav__dropdown--mobile a:last-child,
  .site-nav__mobile-section-links a:last-child {
    border-bottom: none;
  }

  .site-nav__mobile-panel-lead {
    display: block;
    margin: 4px 0 8px;
    padding: 10px 14px;
    font-size: 14px;
    font-weight: 700;
    color: #fff !important;
    background: rgba(37, 99, 235, 0.3);
    border-radius: 8px;
    border-bottom: none !important;
  }
  .site-nav__mobile-panel-desc {
    margin: 0 0 12px;
    padding: 0 2px;
    font-size: 13px;
    line-height: 1.65;
    color: rgba(255, 255, 255, 0.5);
  }
  .site-nav__mobile-section {
    margin-bottom: 12px;
  }
  .site-nav__mobile-section-title {
    padding: 6px 0 4px;
    font-size: 12px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.55);
    letter-spacing: 0.06em;
    text-transform: uppercase;
  }
  .site-nav__mobile-section-links a {
    padding-left: 4px;
  }
  .site-nav__mobile-hot {
    display: inline-block;
    margin-left: 6px;
    padding: 1px 6px;
    font-size: 10px;
    font-weight: 700;
    color: #fff;
    background: #ef4444;
    border-radius: 4px;
    vertical-align: middle;
  }

  .site-nav__mobile-actions {
    display: block;
    padding: 16px 20px 8px;
    margin-top: auto;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }
  .btn--header-mobile {
    display: flex;
    width: 100%;
    min-width: 0;
    height: 46px;
    justify-content: center;
  }

  .menu-toggle.is-active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .menu-toggle.is-active span:nth-child(2) {
    opacity: 0;
  }
  .menu-toggle.is-active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
  .menu-toggle span {
    transition: transform 0.25s, opacity 0.25s;
  }
}

.header-spacer { height: var(--header-height); }

/* Hero */
.hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, #1B3A6B 50%, var(--color-bg-dark) 100%);
  color: var(--color-text-on-dark);
  overflow: hidden;
}
.hero__canvas {
  position: absolute; inset: 0;
  pointer-events: none;
}
.hero__content { position: relative; z-index: 2; padding: 80px 0 48px; }
.hero h1 {
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
  max-width: 720px;
}
.hero p {
  font-size: clamp(1rem, 2vw, 1.125rem);
  color: var(--color-text-muted);
  margin-bottom: 32px;
  max-width: 560px;
}
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero__glow {
  position: absolute;
  width: 600px; height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37,99,235,0.25) 0%, transparent 70%);
  top: -200px; right: -100px;
  pointer-events: none;
}

/* Page banner (inner pages) */
.page-banner {
  position: relative;
  min-height: 280px;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, #1B3A6B 100%);
  color: var(--color-text-on-dark);
  overflow: hidden;
}
.page-banner h1 { font-size: clamp(1.5rem, 3vw, 2.25rem); font-weight: 700; }
.page-banner .hero__glow { top: -150px; right: 10%; }

/* Footer */
.site-footer {
  position: relative;
  background: linear-gradient(180deg, #111827 0%, #0b1120 48%, #080f1a 100%);
  color: rgba(203, 213, 225, 0.82);
  padding: 72px 0 28px;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(56, 189, 248, 0.35), transparent);
  pointer-events: none;
}

.site-footer::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 50% 40% at 12% 0%, rgba(37, 99, 235, 0.12), transparent 60%);
  pointer-events: none;
}

.site-footer .container {
  position: relative;
  z-index: 1;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: minmax(280px, 1.35fr) repeat(3, 1fr);
  gap: 48px 40px;
  margin-bottom: 52px;
}

.site-footer__logo {
  display: inline-block;
  margin-bottom: 4px;
}

.site-footer__logo img {
  width: 152px;
  height: auto;
}

.site-footer__desc {
  margin: 18px 0 0;
  max-width: 420px;
}

.site-footer__desc p {
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(203, 213, 225, 0.78);
  margin-bottom: 12px;
}

.site-footer__desc p:last-child {
  margin-bottom: 0;
}

.site-footer__hotline {
  display: flex;
  flex-wrap: wrap;
  gap: 28px 36px;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.site-footer__label {
  display: block;
  font-size: 0.875rem;
  color: rgba(148, 163, 184, 0.9);
  margin-bottom: 6px;
  letter-spacing: 0.04em;
}

.site-footer__phone {
  font-size: 1.5rem;
  font-weight: 700;
  color: #f8fafc;
  letter-spacing: 0.02em;
  transition: color var(--transition);
}

.site-footer__phone--secondary {
  font-size: 1.25rem;
}

.site-footer__phone:hover {
  color: var(--color-primary-light);
}

.site-footer h4 {
  color: #f1f5f9;
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 20px;
  letter-spacing: 0.04em;
}

.site-footer__col ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer ul li {
  margin-bottom: 12px;
}

.site-footer ul li:last-child {
  margin-bottom: 0;
}

.site-footer ul a {
  font-size: 1rem;
  line-height: 1.5;
  color: rgba(203, 213, 225, 0.72);
  transition: color var(--transition);
}

.site-footer ul a:hover {
  color: #93c5fd;
}

.site-footer__codes {
  display: flex;
  gap: 20px;
  margin-top: 24px;
}

.site-footer__code img {
  width: 96px;
  height: 96px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: #fff;
}

.site-footer__code p {
  font-size: 0.875rem;
  text-align: center;
  margin-top: 8px;
  color: rgba(148, 163, 184, 0.95);
}

.site-footer__emails {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.site-footer__emails p {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: rgba(148, 163, 184, 0.92);
  margin-bottom: 6px;
}

.site-footer__emails p:last-child {
  margin-bottom: 0;
}

.site-footer__emails a {
  color: rgba(203, 213, 225, 0.88);
  transition: color var(--transition);
}

.site-footer__emails a:hover {
  color: #93c5fd;
}

.site-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  text-align: center;
  font-size: 0.9375rem;
  color: rgba(148, 163, 184, 0.85);
  line-height: 1.6;
}

.site-footer__bottom a {
  color: rgba(148, 163, 184, 0.85);
  margin-left: 8px;
  transition: color var(--transition);
}

.site-footer__bottom a:hover {
  color: #93c5fd;
}

@media (max-width: 992px) {
  .site-footer {
    padding: 56px 0 24px;
  }

  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px 32px;
    margin-bottom: 40px;
  }

  .site-footer__brand {
    grid-column: 1 / -1;
  }

  .site-footer__desc {
    max-width: none;
  }
}

@media (max-width: 576px) {
  .site-footer {
    padding: 48px 0 20px;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 32px;
    margin-bottom: 32px;
  }

  .site-footer h4 {
    font-size: 1.0625rem;
    margin-bottom: 14px;
  }

  .site-footer ul a {
    font-size: 0.9375rem;
  }

  .site-footer__desc p {
    font-size: 0.9375rem;
    line-height: 1.75;
  }

  .site-footer__hotline {
    flex-direction: column;
    gap: 16px;
    margin-top: 22px;
    padding-top: 20px;
  }

  .site-footer__phone {
    font-size: 1.375rem;
  }

  .site-footer__phone--secondary {
    font-size: 1.125rem;
  }

  .site-footer__codes {
    margin-top: 20px;
  }

  .site-footer__code img {
    width: 88px;
    height: 88px;
  }

  .site-footer__bottom {
    font-size: 0.875rem;
    padding-top: 20px;
  }
}

/* Nav rail (fixed side) — 与爱番番「在线咨询」分层，避免重叠 */
.nav-rail {
  position: fixed;
  right: 12px;
  bottom: calc(96px + env(safe-area-inset-bottom, 0px));
  top: auto;
  transform: none;
  z-index: 880;
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  padding: 8px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
  border: 1px solid var(--color-border);
  transition: opacity 0.25s, transform 0.25s;
}
.nav-rail__item { position: relative; }
.nav-rail__item--top {
  display: none;
  margin: 0;
  padding: 0;
  height: 0;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.25s, transform 0.25s, visibility 0.25s;
}
.nav-rail.is-top-visible .nav-rail__item--top {
  display: block;
  height: auto;
  overflow: visible;
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}
.nav-rail__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.nav-rail__btn:hover { background: var(--color-bg-subtle); }
.nav-rail__btn img { width: 24px; height: 24px; }
.nav-rail__tip {
  position: absolute;
  right: calc(100% + 12px);
  top: 50%;
  transform: translateY(-50%);
  white-space: nowrap;
  background: var(--color-bg-dark);
  color: #fff;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  pointer-events: none;
}
.nav-rail__item:hover .nav-rail__tip {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}
.nav-rail__tip a { color: var(--color-accent); font-weight: 600; display: block; margin-bottom: 4px; }
.nav-rail__tip .phone { display: block; color: #fff; margin: 4px 0; }

/* 爱番番「在线咨询」固定右下角（百度 hm 注入） */
#newBridge,
.newBridge,
#aff-im-root,
[id^="aff-im-root"],
[class*="imlp-component"] {
  z-index: 900 !important;
}
body > iframe[src*="affimvip"],
body > iframe[src*="baidu.com"] {
  z-index: 900 !important;
}

@media (max-width: 992px) {
  .nav-rail {
    right: 10px;
    bottom: calc(76px + env(safe-area-inset-bottom, 0px));
    flex-direction: column;
    gap: 4px;
    padding: 6px;
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.12);
  }
  .nav-rail__item--demo {
    display: none;
  }
  .nav-rail__btn {
    width: 42px;
    height: 42px;
  }
  .nav-rail__tip {
    display: none;
  }
  .nav-rail__item--top {
    display: block;
    height: auto;
    overflow: visible;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
  }
}

@media (max-width: 576px) {
  .nav-rail {
    bottom: calc(68px + env(safe-area-inset-bottom, 0px));
  }
  .nav-rail__btn {
    width: 40px;
    height: 40px;
  }
}

/* Grid helpers */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
@media (max-width: 992px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 576px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

/* Legacy body wrapper */
.legacy-body { padding-top: 0; }
.legacy-body img { max-width: 100%; }