@charset "UTF-8";
/* ==========================================================================
   大恒智能 · 页面样式
   files: assets/css/pages.css
   内容: 首页各区块 / 产品中心 / 产品详情 / 解决方案 / 方案详情 / 新闻 / 视频 / 关于 / 联系
   依据: SPEC-v2.md
   ========================================================================== */

/* ==========================================================================
   一、首页
   ========================================================================== */

/* ----- 1.1 Hero（视频背景 + 左下标题） ----- */
.hero {
  position: relative;
  width: 100%;
  aspect-ratio: 1920 / 760;
  max-height: 760px;
  overflow: hidden;
  background: #2b3a48;
}

.hero__video,
.hero__poster {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(6, 18, 32, .8) 0%, rgba(6, 18, 32, .52) 32%, rgba(6, 18, 32, .12) 60%, rgba(6, 18, 32, 0) 80%),
    linear-gradient(180deg, rgba(6, 18, 32, .3) 0%, rgba(6, 18, 32, 0) 45%);
}

.hero__inner {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  height: 100%;
  color: #fff;
}

.hero__title {
  font-size: clamp(22px, 1.9vw, 32px);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: .06em;
  text-shadow: 0 4px 18px rgba(0, 20, 40, .35);
}

.hero__title strong {
  display: block;
  margin-top: 6px;
  font-size: clamp(34px, 3.2vw, 58px);
  font-weight: 800;
  letter-spacing: .04em;
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  align-self: flex-start;
  min-width: 118px;
  height: 40px;
  margin-top: clamp(18px, 2.2vw, 34px);
  padding: 0 22px;
  font-size: 14px;
  color: #fff;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .85);
  border-radius: 3px;
  backdrop-filter: blur(2px);
  transition: background-color var(--speed) var(--ease), border-color var(--speed) var(--ease);
}

.hero__cta:hover { background: var(--c-brand-2); border-color: var(--c-brand-2); }

/* ----- 1.2 产品中心（4 块平分：单图 / 上下双图 / 单图 / 上下双图，文字在图下方） ----- */
.prod-promo {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  grid-template-rows: repeat(2, minmax(0, 1fr));
  gap: clamp(10px, 1.05vw, 16px);
  aspect-ratio: 1520 / 500;
  margin-top: clamp(24px, 2.6vw, 38px);
}

.prod-promo__item {
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  transition: border-color var(--speed) var(--ease), box-shadow var(--speed) var(--ease);
}

/* 单图占满两行 */
.prod-promo__item.is-tall { grid-row: span 2; }

.prod-promo__item:hover {
  border-color: #cfe0f3;
  box-shadow: var(--shadow-hover);
}

.prod-promo__media {
  position: relative;
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
  background: #fff;
}

.prod-promo__media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  display: block;
  transition: transform .55s var(--ease);
}

.prod-promo__item:hover .prod-promo__media img { transform: scale(1.05); }

/* 分类名在图下方 */
.prod-promo__name {
  flex: 0 0 auto;
  padding: clamp(10px, 1vw, 15px) 8px;
  font-size: clamp(14px, 1.12vw, 18px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--c-title);
  text-align: center;
  transition: color var(--speed) var(--ease);
}

.prod-promo__item:hover .prod-promo__name { color: var(--c-brand-2); }

@media (max-width: 1024px) {
  .prod-promo {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-rows: repeat(4, minmax(0, 1fr));
    aspect-ratio: 760 / 960;
  }
  .prod-promo__item.is-tall { grid-row: span 2; }
}

@media (max-width: 560px) {
  .prod-promo {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: none;
    aspect-ratio: auto;
    gap: 10px;
  }
  .prod-promo__item,
  .prod-promo__item.is-tall {
    grid-row: auto;
    aspect-ratio: auto;
  }
  .prod-promo__media { aspect-ratio: 4 / 3; }
}

/* ----- 1.3 解决方案（5 块平分，平铺展示） ----- */
.sol-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: clamp(10px, 1.05vw, 16px);
  margin-top: clamp(24px, 2.6vw, 38px);
}

.sol-tile {
  position: relative;
  display: block;
  aspect-ratio: 330 / 610;
  overflow: hidden;
  border-radius: var(--radius);
  background: #dbe3ec;
  isolation: isolate;
}

.sol-tile__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .55s var(--ease);
}

.sol-tile:hover .sol-tile__img { transform: scale(1.05); }

.sol-tile__mask {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, rgba(6, 20, 36, 0) 46%, rgba(6, 20, 36, .8) 100%);
  transition: background .4s var(--ease);
  pointer-events: none;
}

.sol-tile:hover .sol-tile__mask {
  background: linear-gradient(180deg, rgba(6, 20, 36, .1) 34%, rgba(8, 42, 88, .86) 100%);
}

.sol-tile__title {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: clamp(14px, 1.4vw, 22px) clamp(10px, 1vw, 16px);
  font-size: clamp(13px, 1vw, 17px);
  font-weight: 700;
  line-height: 1.45;
  color: #fff;
  text-align: center;
  text-shadow: 0 2px 10px rgba(0, 0, 0, .38);
}

@media (max-width: 1024px) {
  .sol-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .sol-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .sol-tile__title { font-size: 13px; }
}

/* 轮播箭头 */
.car-arrow {
  position: absolute;
  top: 50%;
  z-index: 4;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  margin-top: -23px;
  color: var(--c-title);
  background: rgba(255, 255, 255, .94);
  border: 1px solid var(--c-line);
  border-radius: 50%;
  box-shadow: var(--shadow);
  transition: color var(--speed) var(--ease), background-color var(--speed) var(--ease),
    opacity var(--speed) var(--ease);
}

.car-arrow:hover { color: #fff; background: var(--c-brand-2); border-color: var(--c-brand-2); }
.car-arrow--prev { left: 14px; }
.car-arrow--next { right: 14px; }
.car-arrow[disabled] { opacity: .35; pointer-events: none; }

/* ----- 1.4 关于大恒（文字 + 四张实景拼贴） ----- */
.about-stage {
  position: relative;
  aspect-ratio: 914 / 596;
  margin-top: clamp(20px, 2.2vw, 32px);
}

/* 左侧引言 + 按钮 */
.about-quote {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 3;
  width: 51%;
}

.about-quote blockquote {
  position: relative;
  padding: 0 26px;
  font-size: clamp(12.5px, .95vw, 15px);
  line-height: 2;
  color: var(--c-text);
}

.about-quote blockquote::before,
.about-quote blockquote::after {
  position: absolute;
  font-family: Georgia, serif;
  font-size: 34px;
  line-height: 1;
  color: #cfd8e3;
}

.about-quote blockquote::before { content: "\201C"; left: -2px; top: -6px; }
.about-quote blockquote::after { content: "\201D"; right: -2px; bottom: -18px; }

.about-quote .btn {
  margin: 16px 0 0 26px;
  background: #16202b;
  border-color: #16202b;
  color: #fff;
}

.about-quote .btn:hover {
  background: var(--c-brand-2);
  border-color: var(--c-brand-2);
}

/* 四张实景图 */
.about-shot {
  position: absolute;
  overflow: hidden;
  border-radius: 10px;
  background: #e9eef4;
  box-shadow: 0 10px 30px rgba(12, 32, 58, .1);
}

.about-shot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .6s var(--ease);
}

.about-shot:hover img { transform: scale(1.04); }

/* 底部渐隐，保证白色标签可读 */
.about-shot::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(8, 22, 40, .42) 0%, rgba(8, 22, 40, 0) 34%);
  pointer-events: none;
}

.about-shot figcaption {
  position: absolute;
  left: clamp(12px, 1.1vw, 18px);
  top: clamp(12px, 1.1vw, 18px);
  z-index: 2;
  display: grid;
  gap: 2px;
  color: #fff;
}

.about-shot figcaption b {
  font-size: clamp(14px, 1.1vw, 18px);
  font-weight: 700;
  letter-spacing: .04em;
  text-shadow: 0 2px 8px rgba(0, 0, 0, .45);
}

.about-shot figcaption span {
  font-family: var(--font-en);
  font-size: clamp(9px, .68vw, 11px);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, .86);
  text-shadow: 0 1px 6px rgba(0, 0, 0, .45);
}

/* 位置：前台左下大图、园区右上、办公与车间错落叠压 */
.about-shot--reception { left: 3%;  top: 17%; width: 48%; height: 52%; }
.about-shot--park      { left: 54%; top: 0;   width: 44%; height: 43%; }
.about-shot--office    { left: 26%; top: 57%; width: 35%; height: 40%; z-index: 2; }
.about-shot--workshop  { left: 63%; top: 42%; width: 34%; height: 47%; z-index: 2; }

@media (max-width: 1024px) {
  .about-stage {
    position: static;
    aspect-ratio: auto;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }
  .about-quote {
    position: static;
    width: auto;
    grid-column: 1 / -1;
  }
  .about-quote blockquote { padding: 0 22px; }
  .about-quote .btn { margin-left: 22px; }
  .about-shot {
    position: static;
    inset: auto;
    width: auto;
    height: auto;
    aspect-ratio: 4 / 3;
  }
}

@media (max-width: 640px) {
  .about-stage { grid-template-columns: minmax(0, 1fr); }
}

/* ----- 1.4b 荣誉证书（自动无缝轮播） ----- */
.honor {
  overflow: hidden;
}

.honor-viewport {
  position: relative;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 5%, #000 95%, transparent 100%);
  mask-image: linear-gradient(90deg, transparent 0, #000 5%, #000 95%, transparent 100%);
}

.honor-track {
  display: flex;
  width: max-content;
  will-change: transform;
  animation: honor-scroll 86s linear infinite;
}

/* 悬停暂停，方便看清单张 */
.honor:hover .honor-track,
.honor:focus-within .honor-track {
  animation-play-state: paused;
}

@keyframes honor-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

.honor-card {
  flex: 0 0 auto;
  width: clamp(158px, 12.5vw, 232px);
  margin-right: clamp(12px, 1.1vw, 20px);
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 6px 18px rgba(14, 36, 64, .06);
  transition: box-shadow var(--speed) var(--ease), transform var(--speed) var(--ease);
}

.honor-card:hover {
  box-shadow: 0 14px 30px rgba(14, 36, 64, .16);
  transform: translateY(-4px);
}

.honor-card img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 210 / 297;
  object-fit: cover;
  background: #f6f8fa;
}

@media (max-width: 768px) {
  .honor-card { width: 148px; }
  .honor-track { animation-duration: 62s; }
}

@media (prefers-reduced-motion: reduce) {
  .honor-track { animation: none; }
  .honor-viewport { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .honor-card { width: 168px; }
}

/* ----- 1.6 新闻资讯 4×2 ----- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 22px;
}

.news-card {
  min-width: 0;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--speed) var(--ease), box-shadow var(--speed) var(--ease),
    border-color var(--speed) var(--ease);
}

.news-card:hover {
  border-color: #cfe0f3;
  box-shadow: var(--shadow-hover);
  transform: translateY(-5px);
}

.news-card__media img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; }

.news-card__body { padding: 16px 18px 20px; }

.news-card__date { font-size: 12.5px; color: var(--c-muted); }

.news-card__title {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-top: 6px;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--c-title);
}

.news-card:hover .news-card__title { color: var(--c-brand-2); }

.news-card__excerpt {
  display: -webkit-box;
  -webkit-line-clamp: 5;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--c-muted);
}

.center-actions { display: flex; justify-content: center; margin-top: clamp(28px, 3vw, 44px); }

/* ==========================================================================
   二、内页通用：标题组 + 分页 + 侧栏
   ========================================================================== */

/* 页面主标题（居中英文 + 中文下划线） */
.page-title {
  padding-block: clamp(26px, 2.6vw, 42px) clamp(18px, 2vw, 28px);
  text-align: center;
}

.page-title__en {
  display: block;
  font-family: var(--font-en);
  font-size: clamp(26px, 2.6vw, 36px);
  font-weight: 900;
  line-height: 1.2;
  color: var(--c-title);
}

.page-title__cn {
  position: relative;
  display: inline-block;
  margin-top: 6px;
  padding-bottom: 12px;
  font-size: 16px;
  color: var(--c-text);
}

.page-title__cn::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 34px;
  height: 3px;
  margin-left: -17px;
  background: var(--c-brand-2);
  border-radius: 2px;
}

/* 内页两栏：左侧栏 + 右内容 */
.with-sidebar {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: clamp(24px, 3vw, 56px);
  align-items: start;
}

/* ----- 侧栏分类树 ----- */
.side-nav {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.side-nav__group + .side-nav__group { border-top: 1px solid var(--c-line); }

.side-nav__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  width: 100%;
  padding: 14px 16px;
  font-size: 15px;
  font-weight: 600;
  color: var(--c-title);
  text-align: left;
  transition: background-color var(--speed) var(--ease), color var(--speed) var(--ease);
}

.side-nav__head:hover { color: var(--c-brand-2); background: var(--c-brand-light); }

.side-nav__group.is-open > .side-nav__head {
  color: #fff;
  background: var(--c-brand);
}

.side-nav__group.is-open > .side-nav__head:hover { color: #fff; background: var(--c-brand); }

.side-nav__icon { transition: transform var(--speed) var(--ease); }
.side-nav__group.is-open .side-nav__icon { transform: rotate(45deg); }

.side-nav__sub {
  display: none;
  padding: 8px 0 12px;
  background: var(--c-bg-soft);
}
.side-nav__group.is-open .side-nav__sub { display: block; }

.side-nav__sub a {
  display: block;
  padding: 8px 16px 8px 26px;
  font-size: 13.5px;
  color: var(--c-text);
  transition: color var(--speed) var(--ease), background-color var(--speed) var(--ease);
}
.side-nav__sub a:hover { color: var(--c-brand-2); background: #fff; }
.side-nav__sub a.is-active { color: var(--c-brand-2); font-weight: 600; background: #fff; }

/* 视频中心侧栏：单层列表 */
.side-nav--simple .side-nav__link {
  display: block;
  padding: 14px 16px;
  font-size: 15px;
  color: var(--c-title);
}
.side-nav--simple li + li { border-top: 1px solid var(--c-line); }
.side-nav--simple .side-nav__link:hover { color: var(--c-brand-2); background: var(--c-brand-light); }
.side-nav--simple .side-nav__link.is-active { color: #fff; background: var(--c-brand); }

/* ----- 分页 ----- */
.pagination {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: clamp(28px, 3vw, 44px);
  font-size: 14px;
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  height: 34px;
  padding: 0 10px;
  color: var(--c-text);
  border: 1px solid var(--c-line);
  border-radius: 4px;
  transition: color var(--speed) var(--ease), border-color var(--speed) var(--ease),
    background-color var(--speed) var(--ease);
}

.pagination a:hover { color: var(--c-brand-2); border-color: var(--c-brand-2); }

.pagination .is-active {
  color: #fff;
  background: var(--c-brand-2);
  border-color: var(--c-brand-2);
}

.pagination .is-disabled { color: #c3cad4; pointer-events: none; }
.pagination .gap { border: 0; }

/* ==========================================================================
   三、产品中心 / 视频中心：3 列卡片网格
   ========================================================================== */

.card-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.plate-card {
  min-width: 0;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--speed) var(--ease), box-shadow var(--speed) var(--ease),
    border-color var(--speed) var(--ease);
}

.plate-card:hover {
  border-color: #cfe0f3;
  box-shadow: var(--shadow-hover);
  transform: translateY(-5px);
}

.plate-card__media {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 4 / 3;
  padding: 20px;
  background: linear-gradient(180deg, #fbfcfe, #f2f5f9);
}

.plate-card__media img { width: 100%; height: 100%; object-fit: contain; }

.plate-card__name {
  padding: 14px 18px 16px;
  font-size: 15.5px;
  font-weight: 600;
  text-align: center;
  color: var(--c-title);
}

.plate-card:hover .plate-card__name { color: var(--c-brand-2); }

/* ==========================================================================
   四、产品详情
   ========================================================================== */

.pd-top {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: clamp(28px, 3.6vw, 64px);
  align-items: start;
  /* 与上方面包屑条之间留出 40px 间距，避免连在一起 */
  padding-top: 40px;
  padding-bottom: var(--sec-gap);
}

.pd-gallery__main {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 4 / 3;
  padding: 24px;
  background: linear-gradient(180deg, #fbfcfe, #f2f5f9);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
}

.pd-gallery__main img { width: 100%; height: 100%; object-fit: contain; }

.pd-gallery__thumbs {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
}

.pd-thumbs-track {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: none;
}
.pd-thumbs-track::-webkit-scrollbar { display: none; }

.pd-thumbs-track button,
.pd-thumbs-track img {
  flex: 0 0 auto;
  width: 92px;
  height: 68px;
  object-fit: contain;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: 4px;
  transition: border-color var(--speed) var(--ease);
}

.pd-thumbs-track .is-active { border-color: var(--c-brand-2); }
.pd-thumbs-track button { padding: 0; }

.pd-info__title {
  margin-bottom: 18px;
  font-size: clamp(21px, 1.8vw, 27px);
  font-weight: 700;
  color: var(--c-title);
}

/* 参数表：无边框行式 */
.spec-table { font-size: 14px; }

.spec-table tr + tr { border-top: 1px solid var(--c-line); }

.spec-table th,
.spec-table td {
  padding: 9px 0;
  text-align: left;
  vertical-align: top;
}

.spec-table th {
  width: 132px;
  font-weight: 600;
  color: var(--c-title);
  white-space: nowrap;
}

.spec-table td { color: var(--c-text); }

/* 参数表下方的「联系我们」按钮：固定 180px 靠左 */
.pd-info__cta {
  display: inline-flex;
  margin-top: 26px;
  width: 180px;
  min-height: 46px;
  font-size: 15.5px;
  text-align: center;
}

/* 产品详情：左右交替图文 */
.pd-blocks { display: grid; gap: clamp(30px, 3.4vw, 56px);margin-bottom:30px; }

.pd-block {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: clamp(26px, 3.4vw, 56px);
  align-items: center;
}

.pd-block:nth-child(even) .pd-block__media { order: 2; }

.pd-block__media img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; border-radius: var(--radius-lg); }

.pd-block__title {
  font-size: clamp(18px, 1.5vw, 23px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-title);
}

.pd-block__text {;
  font-size: 14px;
  line-height: 1.9;
  color: var(--c-text);
}

/* 应用领域 4 卡 */
.app-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  margin-bottom:30px;
}

.app-card {
  min-width: 0;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--speed) var(--ease), transform var(--speed) var(--ease);
}
.app-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }

.app-card__media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }

.app-card__body { padding: 14px 16px 18px; }

.app-card__icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  margin-top: -32px;
  margin-bottom: 8px;
  color: #fff;
  background: var(--c-brand-2);
  border-radius: 8px;
}

.app-card__title { font-size: 15.5px; font-weight: 700; color: var(--c-title); }
.app-card__desc { margin-top: 5px; font-size: 13px; line-height: 1.75; color: var(--c-muted); }

/* 核心技术 2 栏 */
.core-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(24px, 3vw, 48px);
  margin-bottom:30px;
}

.core-item__media img { width: 100%; aspect-ratio: 16 / 10; object-fit: contain; background: #f7f9fc; border-radius: var(--radius-lg); }

.core-item__body {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-top: 16px;
}

.core-item__icon {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
}

.core-item__title { font-size: 15.5px; font-weight: 700; color: var(--c-title); }
.core-item__text { margin-top: 6px; font-size: 13.5px; line-height: 1.9; color: var(--c-text); }

/* FAQ（灰底圆角块） */
.faq-box {
  padding: clamp(20px, 2.4vw, 34px) clamp(20px, 2.6vw, 40px);
  background: var(--c-bg-soft);
  border-radius: var(--radius-lg);
}

.faq-item + .faq-item { margin-top: 16px; }

.faq-q {
  display: flex;
  gap: 8px;
  width: 100%;
  font-size: 15px;
  font-weight: 700;
  color: var(--c-title);
  text-align: left;
}

.faq-q:hover { color: var(--c-brand-2); }

.faq-a {
  margin-top: 6px;
  padding-left: 20px;
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--c-text);
}

/* ==========================================================================
   五、解决方案列表（交替整行）
   ========================================================================== */

.sol-rows { display: grid; }

.sol-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  min-height: 340px;
}

.sol-row__text {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: clamp(24px, 3vw, 52px);
  text-align: center;
}

.sol-row__title { font-size: clamp(18px, 1.5vw, 23px); font-weight: 700; color: var(--c-title); }
.sol-row__desc { max-width: 34em; font-size: 14px; line-height: 1.9; color: var(--c-text); }

.sol-row__media { overflow: hidden; }
.sol-row__media img { width: 100%; height: 100%; object-fit: cover; }

/* 偶数行：图在左 */
.sol-row:nth-child(even) .sol-row__media { order: -1; }

/* ==========================================================================
   六、解决方案详情
   ========================================================================== */

.sd-title {
  padding-block: clamp(24px, 2.4vw, 36px) clamp(16px, 1.8vw, 24px);
  text-align: center;
  font-size: clamp(21px, 1.9vw, 28px);
  font-weight: 700;
  color: var(--c-title);
}

/* 行业特点编号列表 */
.feature-list { counter-reset: fl; }
.feature-list li {
  position: relative;
  padding-left: 26px;
  font-size: 18px;
  line-height: 1.95;
  color: var(--c-text);
}
.feature-list li + li { margin-top: 6px; }
.feature-list li::before {
  counter-increment: fl;
  content: counter(fl) "、";
  position: absolute;
  left: 0;
  color: var(--c-brand-2);
  font-weight: 700;
}

/* 产品/应用推荐横排 */
.rec-strip { position: relative; padding-inline: 54px; }

.rec-track {
  display: flex;
  gap: 18px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
}
.rec-track::-webkit-scrollbar { display: none; }

.rec-item {
  flex: 0 0 calc((100% - 54px) / 4);
  min-width: 0;
  scroll-snap-align: start;
  text-align: center;
}

/* 产品推荐 / 用户产品：窄屏每屏 3 个、2 个 */
@media (max-width: 1024px) {
  .rec-item { flex: 0 0 calc((100% - 36px) / 3); }
}

@media (max-width: 640px) {
  .rec-item { flex: 0 0 calc((100% - 18px) / 2); }
}

.rec-item__media {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 4 / 3;
  padding: 16px;
}
.rec-item__media img { width: 100%; height: 100%; object-fit: contain; }

.rec-item__name { margin-top: 10px; font-size: 14px; font-weight: 600; color: var(--c-title); }

/* 用户案例：深蓝表头表格 */
.case-table {
  font-size: 13.5px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.case-table thead th {
  padding: 11px 14px;
  font-size: 13.5px;
  font-weight: 600;
  color: #fff;
  text-align: center;
  background: var(--c-brand);
}

.case-table tr{
  background: #f6f7f9;
}

.case-table td {
  padding: 13px 14px;
  color: var(--c-title);
  text-align: center;
  font-weight: 700;
  border-top: 1px solid var(--c-line);
}

/* 概述块 */
.overview p { font-size: 14px; line-height: 1.95; color: var(--c-text); }
.overview p + p { margin-top: 10px; }

/* 参数卡（4 个） */
.info-cards {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 20px;
}

.info-card {
  padding: 16px 18px;
  background: var(--c-bg-soft);
  border-radius: var(--radius);
}

.info-card__label { display: block; font-size: 14px; font-weight: 700; color: var(--c-title); }
.info-card__value { display: block; margin-top: 4px; font-size: 14px; color: var(--c-title); }

/* 三栏：痛点 / 方案 / 核心内容 */
.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.pain-col {
  padding: 20px;
  background: var(--c-bg-soft);
  border-radius: var(--radius);
  border-top: 3px solid var(--c-brand-2);
}

.pain-col--pain { border-top-color: #c0392b; }

.pain-col__num {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--c-accent);
}

.pain-col__title { margin-top: 4px; font-size: 15px; font-weight: 700; color: var(--c-title); }
.pain-col__text { margin-top: 8px; font-size: 13px; line-height: 1.9; color: var(--c-text); }

/* 定制细节 + 工艺流程 */
.custom-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.custom-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.custom-card {
  padding: 18px;
  background: var(--c-bg-soft);
  border-radius: var(--radius);
  border-top: 3px solid var(--c-brand-2);
}

.custom-card__num { font-size: 11.5px; font-weight: 700; letter-spacing: .08em; color: var(--c-accent); }
.custom-card__title { margin-top: 4px; font-size: 14.5px; font-weight: 700; color: var(--c-title); }
.custom-card__text { margin-top: 6px; font-size: 13px; line-height: 1.85; color: var(--c-text); }

.flow-box {
  padding: 20px 22px;
  background: var(--c-bg-soft);
  border-radius: var(--radius);
}

.flow-box__title { margin-bottom: 12px; font-size: 15px; font-weight: 700; color: var(--c-title); }

.flow-steps li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 9px 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--c-text);
  border-bottom: 1px dashed var(--c-line);
}
.flow-steps li:last-child { border-bottom: 0; }

.flow-steps .n {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  background: var(--c-brand);
  border-radius: 50%;
}

/* 项目成果 */
.achieve-head {
  padding: 12px 20px;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  background: var(--c-brand);
  border-radius: var(--radius) var(--radius) 0 0;
}

.achieve-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
  padding: 18px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-top: 0;
  border-radius: 0 0 var(--radius) var(--radius);
}

/* 项目成果 4~8 条：全部挤在一排，列数随条数变化 */
.achieve-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.achieve-grid--5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.achieve-grid--6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.achieve-grid--7 { grid-template-columns: repeat(7, minmax(0, 1fr)); }
.achieve-grid--8 { grid-template-columns: repeat(8, minmax(0, 1fr)); }

/* 条数多时卡片更紧凑，保证一行放得下 */
.achieve-grid--6 .achieve-item,
.achieve-grid--7 .achieve-item,
.achieve-grid--8 .achieve-item {
  padding: 16px 10px;
}

.achieve-grid--6 .achieve-item__text,
.achieve-grid--7 .achieve-item__text,
.achieve-grid--8 .achieve-item__text {
  font-size: 12.5px;
  line-height: 1.6;
}

.achieve-grid--7,
.achieve-grid--8 {
  gap: 8px;
  padding: 14px;
}

.achieve-grid--7 .achieve-item,
.achieve-grid--8 .achieve-item {
  padding: 12px 8px;
}

.achieve-grid--7 .achieve-item__text,
.achieve-grid--8 .achieve-item__text {
  font-size: 12px;
  line-height: 1.55;
}

.achieve-grid--7 .achieve-item__icon,
.achieve-grid--8 .achieve-item__icon {
  width: 24px;
  height: 24px;
  margin-bottom: 8px;
  font-size: 13px;
}

/* 窄屏时改为换行，避免挤成一团 */
@media (max-width: 1280px) {
  .achieve-grid--6,
  .achieve-grid--7,
  .achieve-grid--8 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 1024px) {
  .achieve-grid,
  .achieve-grid--4,
  .achieve-grid--5,
  .achieve-grid--6,
  .achieve-grid--7,
  .achieve-grid--8 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .achieve-grid--6 .achieve-item__text,
  .achieve-grid--7 .achieve-item__text,
  .achieve-grid--8 .achieve-item__text {
    font-size: 14px;
  }
}

@media (max-width: 640px) {
  .achieve-grid,
  .achieve-grid--4,
  .achieve-grid--5,
  .achieve-grid--6,
  .achieve-grid--7,
  .achieve-grid--8 {
    grid-template-columns: minmax(0, 1fr);
  }
}
}

.achieve-item {
  padding: 18px 12px;
  font-size: 13px;
  line-height: 1.7;
  text-align: center;
  color: var(--c-text);
  background: var(--c-bg-soft);
  border-radius: var(--radius);
}

.achieve-item--hot { background: #fff8ec; border: 1px solid var(--c-accent); }

.achieve-item__icon {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  margin: 0 auto 8px;
  color: #fff;
  background: var(--c-brand);
  border-radius: 6px;
  font-size: 13px;
}

.achieve-item--hot .achieve-item__icon { background: var(--c-accent); }

/* CTA 条 */
.cta-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 26px;
  padding: 22px 28px;
  color: #fff;
  background: linear-gradient(135deg, #0a3558, var(--c-brand));
  border-radius: var(--radius);
}

.cta-bar__title { font-size: clamp(16px, 1.4vw, 20px); font-weight: 700; line-height: 1.5; }
.cta-bar__desc { margin-top: 6px; font-size: 13.5px; color: rgba(255, 255, 255, .82); }

.cta-bar .btn {
  color: #fff;
  background: var(--c-accent);
  border-color: var(--c-accent);
}
.cta-bar .btn:hover { background: #e2961a; border-color: #e2961a; }

/* ==========================================================================
   七、新闻中心（单列行式列表）
   ========================================================================== */

.news-tabs {
  display: flex;
  justify-content: center;
  gap: clamp(20px, 3vw, 48px);
  padding-block: 8px clamp(18px, 2vw, 26px);
}

.news-tabs a {
  position: relative;
  padding-bottom: 8px;
  font-size: 16px;
  color: var(--c-text);
}

.news-tabs a:hover { color: var(--c-brand-2); }

.news-tabs a.is-active {
  font-weight: 700;
  color: var(--c-brand-2);
}

.news-tabs a.is-active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--c-brand-2);
}

.news-list { display: grid; gap: clamp(22px, 2.6vw, 38px); }

.news-row {
  display: grid;
  grid-template-columns: 380px minmax(0, 1fr);
  gap: clamp(22px, 2.6vw, 44px);
  align-items: start;
}

.news-row__media {
  display: block;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: #eef2f6;
}

.news-row__media img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; }

.news-row__body { min-width: 0; }

.news-row__title {
  font-size: clamp(16px, 1.35vw, 20px);
  font-weight: 700;
  line-height: 1.6;
  color: var(--c-title);
}
.news-row:hover .news-row__title { color: var(--c-brand-2); }

.news-row__date { margin-top: 6px; font-size: 13px; color: var(--c-muted); }

.news-row__excerpt {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--c-text);
}

.news-row__more {
  display: inline-flex;
  align-items: center;
  height: 30px;
  margin-top: 14px;
  padding: 0 16px;
  font-size: 13px;
  color: var(--c-text);
  border: 1px solid #cfd8e3;
  border-radius: 3px;
  transition: color var(--speed) var(--ease), border-color var(--speed) var(--ease);
}
.news-row:hover .news-row__more { color: var(--c-brand-2); border-color: var(--c-brand-2); }


/* ==========================================================================
   发展历程：大图 + 右侧文字 + 底部横向年份轴（左右箭头切换）
   ========================================================================== */

.hist {
  position: relative;
  padding-inline: clamp(44px, 5vw, 76px);
}

.hist__viewport { overflow: hidden; }

.hist__track {
  display: flex;
  transition: transform .45s cubic-bezier(.22, .61, .36, 1);
  will-change: transform;
}

.hist__item {
  flex: 0 0 100%;
  display: grid;
  grid-template-columns: minmax(0, 420px) minmax(0, 1fr);
  gap: clamp(28px, 4.4vw, 78px);
  align-items: start;
  min-width: 0;
  padding-block: 6px;
}

.hist__media {
  width:320px;
  height:202px;
  //aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--radius);
  background: #eef2f6;
}

.hist__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hist__body { min-width: 0; }

.hist__title {
  font-size: clamp(19px, 1.6vw, 25px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-title);
}

.hist__lines {
  margin-top: clamp(14px, 1.6vw, 22px);
  display: grid;
  gap: 8px;
}

.hist__lines li {
  font-size: 14px;
  line-height: 1.95;
  color: var(--c-text);
}

/* 左右箭头 */
.hist__arrow {
  position: absolute;
  top: 50%;
  z-index: 3;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  margin-top: -24px;
  color: #fff;
  background: #c9cfd6;
  border: 0;
  border-radius: 50%;
  transition: background-color var(--speed) var(--ease), opacity var(--speed) var(--ease);
}

.hist__arrow:hover { background: var(--c-brand); }
.hist__arrow[disabled] { opacity: .35; cursor: default; }
.hist__arrow--prev { left: 0; }
.hist__arrow--next { right: 0; }

/* 底部年份轴 */
.hist-timeline {
  position: relative;
  display: flex;
  margin-top: clamp(22px, 2.6vw, 38px);
  padding-top: 8px;
}

.hist-timeline::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 12px;
  height: 1px;
  background: #dfe3e8;
}

/* 已走过部分的实线 */
.hist-timeline__progress {
  position: absolute;
  left: 0;
  top: 12px;
  height: 1px;
  background: var(--c-brand);
  transition: width .45s cubic-bezier(.22, .61, .36, 1);
}

.hist-year {
  position: relative;
  z-index: 2;
  flex: 1 1 0;
  min-width: 0;
  padding-top: 22px;
  color: #9ca3af;
  background: none;
  border: 0;
  font-size: 14px;
  text-align: center;
  transition: color var(--speed) var(--ease);
}

.hist-year::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 4px;
  width: 9px;
  height: 9px;
  margin-left: -4.5px;
  background: #cfd4da;
  border-radius: 50%;
  transition: background-color var(--speed) var(--ease), transform var(--speed) var(--ease);
}

.hist-year:hover { color: var(--c-brand-2); }

.hist-year.is-active {
  color: var(--c-brand);
  font-weight: 700;
}

.hist-year.is-active::before {
  background: var(--c-brand);
  transform: scale(1.5);
}

@media (max-width: 1024px) {
  .hist { padding-inline: 0; }
  .hist__item { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .hist__arrow { top: auto; bottom: -6px; margin-top: 0; width: 42px; height: 42px; }
  .hist__arrow--prev { left: auto; right: 54px; }
  .hist__arrow--next { right: 0; }
  .hist-timeline { margin-top: 56px; overflow-x: auto; }
  .hist-year { flex: 0 0 90px; }
}

/* ==========================================================================
   八、新闻详情
   ========================================================================== */

.article-head {
  padding-block: clamp(24px, 2.6vw, 40px) 18px;
  text-align: center;
  border-bottom: 1px solid var(--c-line);
}

.article-head__title {
  font-size: clamp(20px, 1.9vw, 28px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-title);
}

.article-head__meta { margin-top: 12px; font-size: 13.5px; color: var(--c-muted); }

.article-body {
  max-width: 1180px;
  margin-inline: auto;
  padding-block: clamp(22px, 2.4vw, 36px);
  font-size: 14.5px;
  line-height: 2.05;
  color: var(--c-text);
}

.article-body p + p { margin-top: 12px; }

.article-body figure { margin: 24px 0; }
.article-body figure img {
  width: 100%;
  max-width: 760px;
  margin-inline: auto;
  border-radius: var(--radius);
}

.article-body figcaption {
  margin-top: 8px;
  font-size: 12.5px;
  color: var(--c-muted);
  text-align: center;
}

.article-body ol {
  counter-reset: art;
  margin-top: 6px;
}

.article-body ol li {
  position: relative;
  padding-left: 26px;
}
.article-body ol li + li { margin-top: 8px; }
.article-body ol li::before {
  counter-increment: art;
  content: counter(art) "、";
  position: absolute;
  left: 0;
  color: var(--c-brand-2);
  font-weight: 700;
}


/* ==========================================================================
   合作伙伴（关于页）：6×3 网格 + 悬停放大 1.1 倍
   ========================================================================== */

.partners-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: clamp(18px, 2.4vw, 40px) clamp(12px, 2vw, 32px);
  align-items: center;
  max-width: 1580px;
  margin: clamp(20px, 2.4vw, 34px) auto 0;
}

.partner-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  aspect-ratio: 195 / 100;
  padding: 8px;
  background: transparent;
  border: 0;
  text-decoration: none;
  transition: transform .3s cubic-bezier(.22, .61, .36, 1);
  transform-origin: center;
  will-change: transform;
}

/* 悬停放大 1.1 倍 */
.partner-logo:hover,
.partner-logo:focus-visible {
  transform: scale(1.1);
  z-index: 2;
  position: relative;
}

.partner-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  transition: filter .3s var(--ease);
}

/* 灰白底图上给一点对比度 */
.partner-logo:hover img {
  filter: saturate(1.08);
}

.partners-intro {
  max-width: 1240px;
  margin: clamp(14px, 1.6vw, 22px) auto 0;
  font-size: 13.5px;
  line-height: 1.95;
  color: var(--c-text);
  text-align: center;
}

@media (max-width: 1024px) {
  .partners-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (max-width: 768px) {
  .partners-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .partner-logo:hover { transform: scale(1.05); }
}

@media (max-width: 480px) {
  .partners-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (prefers-reduced-motion: reduce) {
  .partner-logo { transition: none; }
  .partner-logo:hover { transform: none; }
}




/* ==========================================================================
   核心技术（关于大恒 → 核心技术）
   ========================================================================== */

/* 左右平分两栏 */
.core-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(24px, 3vw, 48px);
  align-items: start;
}

.core-block { min-width: 0; }

.core-block__media {
  overflow: hidden;
  border-radius: var(--radius);
  background: #eef3f8;
}

.core-block__media img {
  display: block;
  width: 100%;
  height: auto;
}

/* 图标在左、标题与说明在右 */
.core-block__text {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  margin-top: clamp(16px, 1.8vw, 24px);
}

.core-block__icon {
  width: 56px;
  height: 56px;
  flex: 0 0 auto;
}

.core-block__body { min-width: 0; }

.core-block__title {
  font-size: clamp(17px, 1.5vw, 21px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--c-title);
}

.core-block__desc {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.95;
  color: var(--c-text);
}

/* ----- 特点折叠面板 ----- */
.core-accs {
  margin-top: clamp(28px, 3vw, 46px);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.core-acc {
  border-radius: 4px;
  overflow: hidden;
}

.core-acc__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 17px 22px;
  cursor: pointer;
  background: #f1f2f4;
  color: var(--c-title);
  font-size: 15px;
  font-weight: 600;
  list-style: none;
  user-select: none;
  transition: background-color var(--speed) var(--ease), color var(--speed) var(--ease);
}

.core-acc__head::-webkit-details-marker { display: none; }

.core-acc__head:hover { background: #e9ebee; }

.core-acc[open] > .core-acc__head {
  background: #2e2e2e;
  color: #fff;
}

.core-acc[open] > .core-acc__head:hover { background: #262626; }

.core-acc__chevron {
  flex: 0 0 auto;
  transition: transform var(--speed) var(--ease);
}

.core-acc[open] > .core-acc__head .core-acc__chevron { transform: rotate(90deg); }

.core-acc__list {
  padding: 20px 24px 22px;
  background: #f7f7f8;
}

.core-acc__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 2;
  color: var(--c-text);
}

.core-acc__list li::before {
  content: "•";
  position: absolute;
  left: 2px;
  top: 0;
}

/* ----- 原理视频 ----- */
.core-video {
  margin-top: clamp(34px, 3.6vw, 60px);
  padding-top: clamp(30px, 3.4vw, 52px);
  border-top: 1px solid var(--c-line);
  text-align: center;
}

.core-video__title {
  font-size: clamp(18px, 1.7vw, 23px);
  font-weight: 700;
  color: var(--c-title);
}

.core-video__desc {
  margin: 14px auto 0;
  max-width: 1080px;
  font-size: 14.5px;
  line-height: 2.05;
  color: var(--c-text);
}

.core-video__frame {
  margin-top: clamp(20px, 2.2vw, 30px);
  border-radius: var(--radius);
  overflow: hidden;
  background: #0b1220;
  box-shadow: 0 18px 44px rgba(12, 40, 78, .16);
}

.core-video__player {
  display: block;
  width: 100%;
  max-height: 78vh;
  background: #000;
}

@media (max-width: 900px) {
  .core-pair { grid-template-columns: minmax(0, 1fr); }
}

/* ==========================================================================
   客户案例列表：4 列错落网格，图文上下交替
   ========================================================================== */

.cases-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(24px, 2.6vw, 44px) clamp(16px, 1.6vw, 26px);
  align-items: start;
}

.case-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}

/* 偶数卡：文字在上、图片在下 */
.case-card:nth-child(even) .case-card__media { order: 2; }
.case-card:nth-child(even) .case-card__body { order: 1; }

/* 奇数卡整体下移，形成错落 */
.case-card:nth-child(even) { margin-top: clamp(28px, 3.2vw, 56px); }

.case-card__media {
  overflow: hidden;
  border-radius: var(--radius);
  background: #eef2f6;
}

.case-card__media img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
  transition: transform .55s var(--ease);
}

.case-card:hover .case-card__media img { transform: scale(1.05); }

.case-card__title {
  font-size: clamp(14px, 1.05vw, 16.5px);
  font-weight: 700;
  line-height: 1.55;
  color: var(--c-title);
  text-align: center;
}

.case-card__title a { color: inherit; }
.case-card__title a:hover { color: var(--c-brand-2); }

.case-card__desc {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.9;
  color: var(--c-text);
  text-align: center;
}

@media (max-width: 1024px) {
  .cases-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .case-card:nth-child(even) { margin-top: 0; }
  .case-card:nth-child(4n+2) { margin-top: clamp(20px, 3vw, 40px); }
}

@media (max-width: 560px) {
  .cases-grid { grid-template-columns: minmax(0, 1fr); }
  .case-card:nth-child(even),
  .case-card:nth-child(4n+2) { margin-top: 0; }
}

/* 案例详情：上一组 / 下一组 */
.case-pager {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: clamp(28px, 3vw, 44px);
  padding-top: clamp(20px, 2vw, 28px);
  border-top: 1px solid var(--c-line);
}

.case-pager__link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 18px;
  background: var(--c-bg-soft);
  border-radius: var(--radius);
  transition: background-color var(--speed) var(--ease);
}

.case-pager__link:hover { background: var(--c-brand-light); }

.case-pager__label { font-size: 12.5px; color: var(--c-muted); }
.case-pager__title { font-size: 14.5px; font-weight: 600; color: var(--c-title); }

.case-pager__link--next { text-align: right; }

@media (max-width: 768px) {
  .case-pager { grid-template-columns: minmax(0, 1fr); }
  .case-pager__link--next { text-align: left; }
}

/* ==========================================================================
   我们的优势（关于页）：4 列 × 2 行，文字块与图片块交替
   ========================================================================== */

.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(12px, 1.2vw, 20px);
}

.adv-cell {
  min-width: 0;
  min-height: clamp(240px, 24vw, 336px);
}

/* 文字块：浅灰底，数字在上、说明沉底 */
.adv-cell--text {
  display: flex;
  flex-direction: column;
  padding: clamp(20px, 2.2vw, 38px);
  background: #f4f5f6;
}

.adv-num {
  font-size: clamp(24px, 2.5vw, 36px);
  font-weight: 700;
  line-height: 1.2;
  color: #2b2b2b;
  letter-spacing: .01em;
}

.adv-label {
  margin-top: 8px;
  font-size: clamp(16px, 1.55vw, 22px);
  line-height: 1.35;
  color: #333;
}

.adv-desc {
  margin-top: auto;
  padding-top: 18px;
  font-size: 13.5px;
  line-height: 1.95;
  color: #555;
}

/* 图片块：等比铺满 */
.adv-cell--media {
  overflow: hidden;
  background: #eef2f6;
}

.adv-cell--media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

@media (max-width: 1024px) {
  .adv-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .adv-cell { min-height: 220px; }
}

@media (max-width: 560px) {
  .adv-grid { grid-template-columns: minmax(0, 1fr); }
  .adv-cell { min-height: 180px; }
  .adv-cell--media { min-height: 200px; }
}

/* ==========================================================================
   九、关于大恒
   ========================================================================== */

.about-tabs {
  display: flex;
  justify-content: center;
  gap: clamp(22px, 3.4vw, 64px);
  padding-block: 6px 18px;
  border-bottom: 1px solid var(--c-line);
}

.about-tabs a {
  position: relative;
  padding-bottom: 10px;
  font-size: 16px;
  color: var(--c-text);
}
.about-tabs a:hover { color: var(--c-brand-2); }
.about-tabs a.is-active { color: var(--c-brand-2); font-weight: 700; }
.about-tabs a.is-active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  background: var(--c-brand-2);
}

/* 公司简介：左视频 + 右文案（参考图） */
.profile-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(0, 1fr);
  gap: clamp(30px, 3.6vw, 64px);
  align-items: start;
}

.profile-media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #0b1622;
  border-radius: var(--radius);
}

.profile-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  background: #0b1622;
}

/* 居中播放按钮（视频未播放时显示） */
.profile-play {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 2;
  display: grid;
  place-items: center;
  width: clamp(64px, 6vw, 86px);
  height: clamp(64px, 6vw, 86px);
  color: #fff;
  background: rgba(255, 255, 255, .18);
  border: 2px solid rgba(255, 255, 255, .9);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  backdrop-filter: blur(2px);
  transition: background-color var(--speed) var(--ease), transform var(--speed) var(--ease);
}

.profile-play svg { margin-left: 4px; }

.profile-play:hover {
  background: rgba(255, 255, 255, .32);
  transform: translate(-50%, -50%) scale(1.06);
}

.profile-media.is-playing .profile-play { display: none; }

.profile-text { min-width: 0; }

.profile-text > p:first-child {
  font-size: 14.5px;
  line-height: 2;
  color: var(--c-text);
}

.profile-h3 {
  margin: clamp(16px, 1.8vw, 24px) 0 8px;
  font-size: clamp(17px, 1.4vw, 21px);
  font-weight: 700;
  color: var(--c-brand-2);
}

.profile-text p {
  font-size: 14.5px;
  line-height: 2;
  color: var(--c-text);
}

@media (max-width: 1024px) {
  .profile-grid { grid-template-columns: minmax(0, 1fr); gap: 24px; }
}

/* 厂区图片 4×2 */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.gallery-grid img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius);
}

/* 发展历程横向时间线 */
.timeline-wrap { position: relative; padding-inline: 46px; }

.timeline-track {
  display: flex;
  overflow-x: auto;
  scroll-behavior: smooth;
  scrollbar-width: none;
}
.timeline-track::-webkit-scrollbar { display: none; }

.timeline-item {
  flex: 0 0 25%;
  min-width: 220px;
  padding: 0 12px;
  text-align: center;
}

.timeline-item__year {
  font-family: var(--font-en);
  font-size: clamp(19px, 1.6vw, 24px);
  font-weight: 900;
  color: var(--c-title);
}

/* 轴线 */
.timeline-track__axis {
  position: relative;
  display: flex;
  align-items: center;
  height: 26px;
  margin-block: 10px;
}

.timeline-track__axis::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  background: #cfd8e3;
}

.timeline-item__dot {
  position: relative;
  z-index: 2;
  display: block;
  width: 9px;
  height: 9px;
  margin-inline: auto;
  background: #cfd8e3;
  border: 2px solid #fff;
  border-radius: 50%;
  box-shadow: 0 0 0 1px #cfd8e3;
}

.timeline-item__dot.is-current { background: var(--c-brand-2); box-shadow: 0 0 0 1px var(--c-brand-2); }

.timeline-item__title { font-size: 13.5px; font-weight: 700; color: var(--c-title); }
.timeline-item__text { margin-top: 6px; font-size: 12.5px; line-height: 1.8; color: var(--c-muted); }

/* 证书轮播 */
/* 合作客户地图 */
.customer-intro { max-width: 1080px; margin: 0 auto 20px; font-size: 13.5px; line-height: 1.9; color: var(--c-text); }

.map-block + .map-block { margin-top: 22px; }

.map-block__label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  font-size: 15px;
  font-weight: 700;
  color: var(--c-title);
}

.map-block__img { width: 100%; border-radius: var(--radius); background: #f7f9fc; }

/* ==========================================================================
   十、联系我们
   ========================================================================== */

.contact-head {
  padding-block: clamp(18px, 2vw, 28px) 10px;
  text-align: center;
  font-size: 15px;
  color: var(--c-text);
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(26px, 3.4vw, 56px);
  align-items: start;
  padding-block: clamp(20px, 2.4vw, 34px);
}

.company-name { font-size: clamp(17px, 1.5vw, 21px); font-weight: 700; color: var(--c-title); }
.company-name__en { margin-top: 2px; font-size: 13px; color: var(--c-muted); }

.contact-list { margin-top: 18px; display: grid; gap: 10px; }

.contact-list li { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: var(--c-text); }
.contact-list__icon { flex: 0 0 auto; color: var(--c-brand-2); margin-top: 3px; }

.branch-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
}

.branch-item {  padding: 12px 14px;
  font-size: 13px;
  color: var(--c-text);
  background: var(--c-bg-soft);
  border-radius: var(--radius);
}

.branch-item__name {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-bottom: 4px;
  font-size: 14px;
  font-weight: 700;
  color: var(--c-title);
}

/* 表单 */
.inquiry-box {
  padding: clamp(20px, 2.4vw, 30px);
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.inquiry-box__title { font-size: 17px; font-weight: 700; color: var(--c-title); }
.inquiry-box__sub { margin-top: 2px; font-size: 12.5px; color: var(--c-muted); }

.form { margin-top: 16px; display: grid; gap: 14px; }

.form__field { display: grid; gap: 6px; min-width: 0; }

.form label { font-size: 13.5px; font-weight: 600; color: var(--c-title); }
.form .req { color: #d93025; }

.form input,
.form select,
.form textarea {
  width: 100%;
  min-width: 0;
  padding: 11px 12px;
  font-size: 14px;
  color: var(--c-title);
  background: #fff;
  border: 1px solid #d8dee6;
  border-radius: 4px;
  transition: border-color var(--speed) var(--ease), box-shadow var(--speed) var(--ease);
}

.form input::placeholder,
.form textarea::placeholder { color: #b3bac4; }

.form input:focus,
.form select:focus,
.form textarea:focus {
  outline: none;
  border-color: var(--c-brand-2);
  box-shadow: 0 0 0 3px rgba(26, 115, 201, .12);
}

.form__error { display: none; font-size: 12.5px; color: #d93025; }
.form__field.is-invalid .form__error { display: block; }
.form__field.is-invalid input,
.form__field.is-invalid select,
.form__field.is-invalid textarea { border-color: #d93025; }

.form__note { font-size: 12px; color: var(--c-muted); }
.form__success {
  padding: 10px 14px;
  font-size: 13.5px;
  color: #1a7f4b;
  background: #eaf7ef;
  border: 1px solid #b7e2c6;
  border-radius: 4px;
}

.form__submit { justify-self: start; min-width: 140px; }

/* 地图占位 */
.map-slot {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 420px;
  margin-top: 12px;
  padding: 20px;
  font-size: 13.5px;
  line-height: 1.9;
  color: #8a919c;
  text-align: center;
  background: #fbfcfd;
  border: 1px dashed #c9d3df;
  border-radius: var(--radius);
}

/* ==========================================================================
   十一、搜索结果
   ========================================================================== */

.search-head { padding-block: clamp(20px, 2.2vw, 32px); }

.search-results { display: grid; gap: 16px; }

.search-item {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 20px;
  padding: 16px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  transition: box-shadow var(--speed) var(--ease), border-color var(--speed) var(--ease);
}
.search-item:hover { border-color: #cfe0f3; box-shadow: var(--shadow); }

.search-item img { width: 100%; aspect-ratio: 16 / 10; object-fit: contain; background: var(--c-bg-soft); border-radius: 4px; }

.search-item__type {
  display: inline-block;
  padding: 1px 8px;
  font-size: 11.5px;
  color: var(--c-brand-2);
  background: var(--c-brand-light);
  border-radius: 3px;
}

.search-item__title { margin-top: 6px; font-size: 16px; font-weight: 700; color: var(--c-title); }
.search-item__text { margin-top: 6px; font-size: 13.5px; line-height: 1.8; color: var(--c-muted); }

.search-empty {
  padding: 40px 24px;
  text-align: center;
  color: var(--c-text);
  background: var(--c-bg-soft);
  border: 1px dashed var(--c-line);
  border-radius: var(--radius);
}

/* ==========================================================================
   十二、响应式
   ========================================================================== */

@media (max-width: 1366px) {
  .news-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .news-row { grid-template-columns: 320px minmax(0, 1fr); }
  .profile-grid { grid-template-columns: 240px minmax(0, 1fr); }
}

@media (max-width: 1024px) {
  .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); grid-template-rows: none; }
  .product-card--featured { grid-column: 1 / -1; grid-row: auto; }
  .product-card--featured .product-card__media { aspect-ratio: 16 / 9; min-height: 0; }
  .about-grid,
  .pd-top,
  .contact-grid,
  .profile-grid { grid-template-columns: minmax(0, 1fr); }
  .news-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .card-grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .app-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .core-grid,
  .pain-grid { grid-template-columns: minmax(0, 1fr); }
  .with-sidebar { grid-template-columns: minmax(0, 1fr); }
  .gallery-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .sol-row { grid-template-columns: minmax(0, 1fr); min-height: 0; }
  .sol-row:nth-child(even) .sol-row__media { order: 0; }
  .sol-row__media img { aspect-ratio: 16 / 9; }
  .news-row { grid-template-columns: minmax(0, 1fr); }
  .custom-grid { grid-template-columns: minmax(0, 1fr); }
  .achieve-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .info-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .rec-item { flex-basis: calc((100% - 18px) / 2); }
  .timeline-item { flex-basis: 50%; }

  /* 触屏下隐藏左右箭头（可滑动） */
  .car-arrow { display: none; }
  .rec-strip,
  .timeline-wrap { padding-inline: 0; }
}

@media (max-width: 768px) {
  .news-grid { grid-template-columns: minmax(0, 1fr); }
  .card-grid-3 { grid-template-columns: minmax(0, 1fr); }
  .gallery-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .achieve-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero { aspect-ratio: auto; height: 56vw; min-height: 260px; }
  .branch-grid { grid-template-columns: minmax(0, 1fr); }
  .search-item { grid-template-columns: minmax(0, 1fr); }
  .search-item img { aspect-ratio: 16 / 9; }
  .news-tabs,
  .about-tabs { gap: 18px; }
  .footer-links { font-size: 12px; }
}

@media (max-width: 560px) {
  .app-grid,
  .info-cards,
  .custom-cards { grid-template-columns: minmax(0, 1fr); }
  .rec-item,
  .timeline-item { flex-basis: 100%; }
  .about-thumbs { grid-template-columns: minmax(0, 1fr); }
  .stat-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero__title strong { font-size: 30px; }
}

/* ==========================================================================
   客户案例详情：大图 / 两栏痛点 / 客户产品与推荐设备 / 出厂视频
   ========================================================================== */

.case-hero {
  margin: 26px 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #eef3f9;
}

.case-hero img {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 两栏痛点 ---------- */
.pain2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 26px;
  padding: 26px;
  background: var(--c-bg-soft, #f4f6f9);
  border-radius: var(--radius-lg);
}

.pain2-card {
  padding: 26px 28px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 4px 18px rgba(15, 45, 90, .05);
}

.pain2-card__label {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 700;
  color: #d98b1f;
  letter-spacing: .3px;
}

.pain2-card--sol .pain2-card__label { color: #d98b1f; }

.pain2-card__title {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.5;
  font-weight: 700;
  color: var(--c-brand-2, #1f6fd0);
}

.pain2-card__body p {
  margin: 0 0 8px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--c-text, #3a4a60);
}

.pain2-card__body p:last-child { margin-bottom: 0; }

/* ---------- 客户产品 & 推荐设备（同一行） ---------- */
.case-prod {
  padding: 24px;
  margin-top: 8px;
  background: var(--c-bg-soft, #f4f6f9);
  border-radius: var(--radius-lg);
}

.case-prod__imgs {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 16px;
}

.case-prod__cell {
  margin: 0;
  min-width: 0;
}

.case-prod__caption {
  margin: 0 0 8px;
  min-height: 22px;
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--c-title, #10233f);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 340px;
}

.case-prod__imgs--next { margin-top: 26px; }

.case-prod__img {
  display: block;
  height: 300px;
  width: auto;
  max-width: 100%;
  border-radius: 8px;
  background: #e9eef5;
  object-fit: contain;
}

/* ---------- 出厂视频 ---------- */
.case-video__label {
  margin: 30px 0 12px;
  font-size: 15px;
  font-weight: 600;
  color: var(--c-title, #10233f);
  text-align: center;
}

.case-video {
  position: relative;
  width: 100%;
  max-width: 1100px;
  aspect-ratio: 16 / 9;
  background: #0b1220;
  border-radius: 10px;
  margin-left: 11%;
  overflow: hidden;
}

.case-video iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

@media (max-width: 1024px) {
  .pain2 { grid-template-columns: minmax(0, 1fr); padding: 16px; }
  .case-prod { grid-template-columns: minmax(0, 1fr); }
  .case-prod__grid--3,
  .case-prod__grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}


/* ==========================================================================
   联系我们：总部与分公司二维码
   ========================================================================== */

.contact-side { min-width: 0; }

.contact-hq { text-align: center; }

.contact-hq .company-name { margin-bottom: 6px; }

.contact-qr {
  display: block;
  margin: 14px auto 6px;
  padding: 8px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: 8px;
}

.contact-qr--hq { width: 156px; }
.contact-qr--hq img { display: block; width: 100%; height: auto; }

.contact-line {
  margin: 0 0 6px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--c-text);
}

.branch-grid--qr {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 26px;
}

.branch-grid--qr .branch-item {
  text-align: center;
  padding: 12px 8px;
  border-radius: 8px;
  transition: background-color .2s ease;
}

.branch-grid--qr .branch-item:hover { background: var(--c-bg-soft, #f4f6f9); }

.branch-item__qr {
  display: block;
  width: 100%;
  max-width: 120px;
  height: auto;
  margin: 0 auto 10px;
  border-radius: 6px;
}

.branch-grid--qr .branch-item__name {
  margin: 0 0 4px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--c-title);
}

.branch-item__tel {
  margin: 0;
  font-size: 13.5px;
  color: var(--c-muted);
}

@media (max-width: 768px) {
  .branch-grid--qr { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ==========================================================================
   首页 · 客户案例（错落四张）
   ========================================================================== */

.case-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 26px;
  align-items: start;
  margin-top: 30px;
}

.case-strip__item {
  display: flex;
  flex-direction: column;
  gap: 18px;
  transition: transform .3s var(--ease, ease);
}

.case-strip__item:hover { transform: translateY(-4px); }

/* 偶数张：文字在上、图片在下，并整体下移形成错落 */
.case-strip__item.is-alt {
  flex-direction: column-reverse;
  margin-top: 62px;
}

.case-strip__media {
  margin: 0;
  overflow: hidden;
  border-radius: 10px;
  background: #eef3f9;
}

.case-strip__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform .5s var(--ease, ease);
}

.case-strip__item:hover .case-strip__media img { transform: scale(1.03); }

.case-strip__title {
  margin: 0 0 10px;
  font-size: 17px;
  line-height: 1.5;
  font-weight: 700;
  color: var(--c-title);
  text-align: center;
}

.case-strip__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--c-muted);
  text-align: center;
}

@media (max-width: 1024px) {
  .case-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .case-strip__item.is-alt { margin-top: 0; }
}

@media (max-width: 640px) {
  .case-strip { grid-template-columns: minmax(0, 1fr); }
}

/* ==========================================================================
   首页 · 新闻资讯（1 大 + 3 小）
   ========================================================================== */

.news-board { margin-top: 30px; }

.news-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin: 0 0 12px;
  font-size: 13.5px;
  color: var(--c-muted);
}

.news-meta time { display: inline-flex; align-items: center; }
.news-meta time::before {
  content: "";
  width: 13px;
  height: 13px;
  margin-right: 6px;
  border: 1.4px solid currentColor;
  border-radius: 3px;
  opacity: .7;
}

.news-cat {
  display: inline-block;
  padding: 2px 12px;
  background: #eaf1fb;
  border-radius: 999px;
  font-size: 12.5px;
  color: var(--c-brand-2, #1f6fd0);
}

/* 大卡：图左文右 */
.news-feature {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 40px;
  align-items: center;
  padding-bottom: 34px;
  margin-bottom: 34px;
  border-bottom: 1px solid var(--c-line);
}

.news-feature__media {
  position: relative;
  display: block;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: #eef3f9;
}

.news-feature__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s var(--ease, ease);
}

.news-feature:hover .news-feature__media img { transform: scale(1.03); }

.news-feature__badge {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 6px 16px;
  background: #fff;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-title);
  box-shadow: 0 2px 10px rgba(15, 40, 80, .12);
}

.news-feature__title {
  margin: 0 0 14px;
  font-size: 30px;
  line-height: 1.35;
  font-weight: 700;
}

.news-feature__title a { color: var(--c-title); }

.news-feature__excerpt {
  margin: 0 0 22px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-muted);
}

.news-feature__btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  justify-content: center;
  padding: 14px 26px;
  background: var(--c-brand, #0b4f9c);
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  transition: background-color .2s ease;
}

.news-feature__btn:hover { background: var(--c-brand-2, #1f6fd0); }

/* 三张小卡 */
.news-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.news-grid--3 .news-card__media { aspect-ratio: 16 / 10; }

.news-card__more {
  display: inline-block;
  margin-top: 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--c-brand-2, #1f6fd0);
}

@media (max-width: 1024px) {
  .news-feature { grid-template-columns: minmax(0, 1fr); gap: 22px; }
  .news-feature__title { font-size: 22px; }
  .news-grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .news-grid--3 { grid-template-columns: minmax(0, 1fr); }
}

/* ==========================================================================
   产品详情页：图文卡片 / 应用领域 / 核心技术 / FAQ 视频
   ========================================================================== */

/* 产品详情：3 列卡片（图片在上） */
.pd-blocks--cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 26px;
}

.pd-blocks--cards:has(> :nth-child(2):last-child ),
.pd-blocks--cards:has(> :nth-child(4):last-child ) {
  grid-template-columns: repeat(2, 1fr);
}

.pd-blocks--cards .pd-block {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: stretch;
}

/* 卡片模式下取消旧版左右交替的 order 设置 */
.pd-blocks--cards .pd-block:nth-child(even) .pd-block__media,
.pd-blocks--cards .pd-block .pd-block__media {
  order: 0;
}

.pd-blocks--cards .pd-block__media {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: #eef3f9;
  aspect-ratio: 4 / 3;
}

.pd-blocks--cards .pd-block__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.pd-blocks--cards .pd-block__title {
  margin: 0;
  font-size: 20px;
  line-height: 1.5;
  font-weight: 700;
  text-align: center;
  color: var(--c-title);
}

.pd-blocks--cards .pd-block__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-muted);
}

/* 应用领域：3 列卡片 */
.app-grid--cards { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.app-grid--cards .app-card {
  background: #fff;
  border: 1px solid var(--c-line);
}

.app-grid--cards .app-card__media img { aspect-ratio: 4 / 3; }

.app-grid--cards .app-card__body { padding: 16px 18px 20px; }

.app-grid--cards .app-card__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--c-title);
}

.app-grid--cards .app-card__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--c-muted);
}

/* 核心技术：2 列，大图 + 图标 + 标题 + 说明 */
.core-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 40px;
}

.core-item__media {
  margin: 0 0 22px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #eef3f9;
  aspect-ratio: 16 / 9;
}

.core-item__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.core-item__body { display: block; }

.core-item__icon {
  display: block;
  width: 80px;
  height: 80px;
  margin-bottom: 12px;
  margin-right: 12px;
  float: left;
}

.core-item__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--c-title);
}

.core-item__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
  color: var(--c-muted);
}

/* FAQ 视频 */
.faq-video {
  max-width: 900px;
  margin: 26px auto 0;
  padding: 0;
}

.faq-video__frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #0b1220;
  border-radius: 10px;
  overflow: hidden;
}

.faq-video__frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.faq-video__caption {
  margin-top: 12px;
  font-size: 13.5px;
  color: var(--c-muted);
  text-align: center;
}

@media (max-width: 1024px) {
  .pd-blocks--cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .app-grid--cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .core-grid { grid-template-columns: minmax(0, 1fr); gap: 30px; }
}

@media (max-width: 640px) {
  .pd-blocks--cards { grid-template-columns: minmax(0, 1fr); }
  .app-grid--cards { grid-template-columns: minmax(0, 1fr); }
}