/* ============================================================
   南京鲁泰石业有限公司 - 样式表
   设计风格：沿用同栈 Bootstrap 5 + jQuery 自适应方案
   配色主题：白色主调 + 深石绿/赤陶红点缀（简洁明亮风格）
   头尾内联（无 fetch 公共片段），每页均为自包含静态文件
   ============================================================ */

:root {
  /* 主色：深石绿（稳重、自然，区别于参考站蓝） */
  --lt-primary: #2f5d52;
  --lt-primary-dark: #244a41;
  --lt-primary-bright: #4f8a7c;
  /* 强调：赤陶红（呼应「质量为根 诚信为本」的暖石质感） */
  --lt-accent: #b5482e;
  --lt-accent-dark: #8f3823;
  /* 深色：页脚 / 导航底 / 卡片底 */
  --lt-navy: #212825;
  --lt-navy-2: #2e3833;
  --lt-gold: #c2a15a;
  --lt-gray: #f4f5f3;
  --lt-text: #2b2b2b;
  --lt-muted: #6b7280;
  --lt-line: #e6e8e6;
  --container: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  color: var(--lt-text);
  background: #fff;
  font-size: 16px;
  line-height: 1.8;
}

a { text-decoration: none; color: inherit; transition: color .2s; }
a:hover { color: var(--lt-primary-bright); }
img { max-width: 100%; display: block; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 15px; }

/* ---------- 站点头部 ---------- */
#site-header { display: contents; }

.navbar-lt {
  position: sticky;
  top: 0;
  z-index: 1090;
  transition: box-shadow .2s ease;
}
.navbar-lt.nav-scrolled { box-shadow: 0 4px 18px rgba(0,0,0,.08); }

.header { background: #fff; }
.header .container { display: flex; align-items: center; padding: 14px 15px; gap: 16px; }
.header .logo {
  height: 56px; width: 56px; border-radius: 12px; flex: 0 0 auto;
  background: linear-gradient(135deg, var(--lt-primary), var(--lt-primary-dark));
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: 26px; font-weight: 800; box-shadow: 0 6px 16px rgba(47,93,82,.25);
  overflow: hidden;
}
.header .logo img, .footer .f-about .logo img {
  width: 100%; height: 100%; object-fit: cover; border-radius: inherit;
  display: block; box-shadow: none;
}
.header .brand { display: flex; flex-direction: column; }
.header .brand .name { font-size: 24px; font-weight: 700; color: #000; letter-spacing: 1px; line-height: 1.2; }
.header .brand .name b { color: var(--lt-primary); }
.header .brand .en { font-size: 12px; color: var(--lt-muted); letter-spacing: 2px; }
.header .hotline { margin-left: auto; text-align: right; }
.header .hotline .t { font-size: 13px; color: var(--lt-muted); }
.header .hotline .p { font-size: 22px; font-weight: 700; color: var(--lt-accent); line-height: 1.2; }
.header .hotline .p small { font-size: 14px; color: var(--lt-muted); font-weight: 400; }
.header .lang-switch { margin-left: 14px; align-self: center; flex: 0 0 auto; display: inline-flex; align-items: stretch; border: 1px solid var(--lt-primary); border-radius: 20px; overflow: hidden; }
.lang-switch a { display: inline-flex; align-items: center; justify-content: center; padding: 7px 14px; color: var(--lt-primary); font-size: 13px; font-weight: 700; letter-spacing: .5px; line-height: 1; transition: background .2s, color .2s; }
.lang-switch a + a { border-left: 1px solid var(--lt-primary); }
.lang-switch a:hover { background: rgba(47,93,82,.10); }
.lang-switch a.active { background: var(--lt-primary); color: #fff; cursor: default; }

/* ---------- 导航 ---------- */
.navbar-lt { background: #fff; border-bottom: 1px solid var(--lt-line); }
.navbar-lt .container { display: flex; align-items: stretch; }
.nav-lt { display: flex; list-style: none; margin: 0; padding: 0; flex: 1; }
.nav-lt > li { position: relative; }
.nav-lt > li > a {
  display: flex; align-items: center; height: 52px; padding: 0 20px;
  color: var(--lt-navy); font-size: 16px; font-weight: 500; position: relative;
}
.nav-lt > li > a::after {
  content: ""; position: absolute; left: 50%; bottom: 0; width: 0; height: 3px;
  background: var(--lt-gold); transition: .25s; transform: translateX(-50%);
}
.nav-lt > li:hover > a, .nav-lt > li.active > a { background: rgba(47,93,82,.08); color: var(--lt-primary); }
.nav-lt > li:hover > a::after, .nav-lt > li.active > a::after { width: 60%; }
.nav-lt .dropdown-menu-lt {
  position: absolute; top: 100%; left: 0; min-width: 180px;
  background: #fff; box-shadow: 0 8px 24px rgba(0,0,0,.12);
  list-style: none; margin: 0; padding: 6px 0; display: none; z-index: 50;
  border-top: 2px solid var(--lt-gold);
}
.nav-lt > li:hover .dropdown-menu-lt { display: block; }
.nav-lt .dropdown-menu-lt a { display: block; padding: 9px 20px; color: var(--lt-text); font-size: 15px; }
.nav-lt .dropdown-menu-lt a:hover { background: var(--lt-gray); color: var(--lt-primary); padding-left: 26px; }

.nav-toggle { display: none; background: transparent; border: 0; color: var(--lt-navy); font-size: 26px; cursor: pointer; padding: 0 12px; }

/* 滚动后出现的导航右侧区（电话 + 中英切换），滚动后 top:0 时才显示 */
.navbar-aside { display: none; align-items: center; gap: 14px; margin-left: auto; padding-left: 16px; border-left: 1px solid var(--lt-line); }
.navbar-lt.nav-scrolled .navbar-aside { display: flex; }
.navbar-aside .navbar-phone { display: inline-flex; align-items: center; gap: 6px; color: var(--lt-accent); font-weight: 700; font-size: 17px; white-space: nowrap; }
.navbar-aside .navbar-phone::before { content: "\260E"; font-size: 16px; line-height: 1; }
.navbar-aside .navbar-phone span { display: inline; }
.navbar-aside .lang-mini { display: inline-flex; gap: 2px; padding: 3px; border: 1px solid var(--lt-line); border-radius: 22px; background: #fff; }
.navbar-aside .lang-mini a { padding: 5px 11px; border-radius: 18px; font-size: 12px; font-weight: 700; color: var(--lt-muted); line-height: 1; letter-spacing: .5px; transition: background .15s ease, color .15s ease; }
.navbar-aside .lang-mini a.active { background: var(--lt-primary); color: #fff; }
.navbar-aside .lang-mini a:hover:not(.active) { color: var(--lt-primary); }
@media (max-width: 768px) {
  .navbar-aside { gap: 10px; padding-left: 10px; }
  .navbar-aside .navbar-phone span { display: none; }
  .navbar-aside .navbar-phone { font-size: 18px; }
}

/* ---------- 轮播 Banner ---------- */
.hero { position: relative; }
.hero .carousel-item { height: 480px; position: relative; overflow: hidden; }
.hero .carousel-item::before { content: ""; position: absolute; inset: 0; z-index: 0; background-position: center; background-size: cover; background-repeat: no-repeat; transform: scale(1.15); transition: transform 7.5s linear; }
.hero .carousel-item::after { content: ""; position: absolute; inset: 0; z-index: 1; }
.hero .slide-1::before { background-image: url('https://img.systemdiv.com/njlutai/show-01.jpg'); }
.hero .slide-2::before { background-image: url('https://img.systemdiv.com/njlutai/show-09.jpg'); }
.hero .slide-3::before { background-image: url('https://img.systemdiv.com/njlutai/show-17.jpg'); }
.hero .slide-1::after { background: linear-gradient(120deg, rgba(33,40,37,.90), rgba(47,93,82,.82) 60%, rgba(79,138,124,.78)); }
.hero .slide-2::after { background: linear-gradient(120deg, rgba(28,34,30,.92), rgba(43,56,51,.85) 70%, rgba(79,138,124,.80)); }
.hero .slide-3::after { background: linear-gradient(120deg, rgba(33,40,37,.90), rgba(47,93,82,.82) 55%, rgba(181,72,46,.74)); }
.hero .carousel-item.active::before { transform: scale(1.0); }
.hero .carousel-caption {
  bottom: auto; top: 52%; left: 50%; right: auto; z-index: 2;
  transform: translate(-50%, -50%);
  text-align: center; max-width: 820px; width: 90%;
}
.hero .carousel-caption > * { opacity: 1; transform: none; }
.hero .carousel-caption .eyebrow { display: inline-block; background: rgba(255,255,255,.18); padding: 4px 14px; border-radius: 20px; font-size: 14px; letter-spacing: 2px; margin-bottom: 14px; }
.hero .carousel-caption h2 { font-size: 42px; font-weight: 800; margin: 0 0 14px; text-shadow: 0 2px 12px rgba(0,0,0,.25); }
.hero .carousel-caption p { font-size: 18px; opacity: .95; }
.hero .btn-ghost { margin-top: 18px; border: 1px solid #fff; color: #fff; padding: 10px 26px; border-radius: 30px; display: inline-block; background: rgba(255,255,255,.05); margin-right: 10px; }
.hero .btn-ghost:hover { background: #fff; color: var(--lt-primary); }
.hero .btn-ghost.accent { border-color: var(--lt-accent); background: var(--lt-accent); }
.hero .btn-ghost.accent:hover { background: #fff; color: var(--lt-accent); }

/* ---------- 通用区块 ---------- */
.section { padding: 64px 0; }
.section.gray { background: var(--lt-gray); }
.section-title { text-align: center; margin-bottom: 46px; }
.section-title .en { font-size: 14px; letter-spacing: 4px; color: var(--lt-gold); text-transform: uppercase; }
.section-title h2 { font-size: 33px; font-weight: 700; color: var(--lt-navy); margin: 6px 0 10px; position: relative; display: inline-block; }
.section-title h2::after { content: ""; display: block; width: 56px; height: 3px; background: var(--lt-primary); margin: 14px auto 0; }
.section-title .sub { color: var(--lt-muted); font-size: 16px; }

/* 面包屑 */
.crumb { background: var(--lt-gray); font-size: 13px; color: var(--lt-muted); }
.crumb .container { padding: 12px 15px; }
.crumb a:hover { color: var(--lt-primary-bright); }

/* ---------- 首页：关于简介 ---------- */
.about-home { display: flex; gap: 40px; align-items: center; flex-wrap: wrap; }
.about-home .txt { flex: 1 1 480px; }
.about-home .txt p { color: #555; margin-bottom: 16px; }
.about-home .stats { flex: 1 1 320px; display: grid; grid-template-columns: repeat(2,1fr); gap: 18px; }
.stat-card { background: #fff; color: var(--lt-text); border: 1px solid var(--lt-line); border-radius: 10px; padding: 26px; text-align: center; box-shadow: 0 4px 16px rgba(0,0,0,.06); }
.stat-card .num { font-size: 40px; font-weight: 800; color: var(--lt-gold); }
.stat-card .num span { font-size: 26px; }
.stat-card .lab { font-size: 15px; color: var(--lt-muted); margin-top: 6px; letter-spacing: .5px; }

/* ---------- 卡片：核心优势 ---------- */
.svc-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.svc-card { background: #fff; border: 1px solid var(--lt-line); border-radius: 10px; padding: 30px 24px; transition: .25s; border-top: 3px solid var(--lt-primary); display: flex; flex-direction: column; }
.svc-card:hover { box-shadow: 0 12px 30px rgba(0,0,0,.08); transform: translateY(-4px); }
.svc-card .ico { width: 54px; height: 54px; border-radius: 12px; background: rgba(47,93,82,.10); color: var(--lt-primary); display: flex; align-items: center; justify-content: center; font-size: 26px; font-weight: 800; margin-bottom: 16px; }
.svc-card h4 { font-size: 18px; margin: 0 0 10px; color: var(--lt-navy); }
.svc-card p { color: var(--lt-muted); font-size: 15px; margin: 0 0 14px; flex: 1; }
.svc-card a.more { color: var(--lt-primary); font-size: 14px; font-weight: 600; margin-top: auto; }

/* ---------- 产品推荐 / 图片网格 ---------- */
.gallery-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.gallery-card { background: #fff; border: 1px solid var(--lt-line); border-radius: 12px; overflow: hidden; transition: .25s; }
.gallery-card:hover { box-shadow: 0 14px 34px rgba(33,40,37,.14); transform: translateY(-4px); }
.gallery-card .thumb { height: 180px; overflow: hidden; }
.gallery-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.gallery-card:hover .thumb img { transform: scale(1.08); }
.gallery-card .body { padding: 16px 18px; }
.gallery-card .body h4 { font-size: 17px; margin: 0 0 6px; color: var(--lt-navy); }
.gallery-card .body .tag { display: inline-block; font-size: 12px; color: var(--lt-primary); background: rgba(47,93,82,.10); padding: 2px 10px; border-radius: 20px; margin-bottom: 8px; }
.gallery-card .body p { font-size: 14px; color: var(--lt-muted); margin: 0; }

/* ---------- 产品列表（文字型） ---------- */
.product-list { display: flex; flex-direction: column; gap: 0; }
.product-item { display: flex; gap: 24px; padding: 26px 0; border-bottom: 1px dashed var(--lt-line); align-items: flex-start; }
.product-item:last-child { border-bottom: 0; }
.product-item .idx { flex: 0 0 60px; height: 60px; border-radius: 50%; background: var(--lt-primary); color: #fff; font-size: 22px; font-weight: 800; display: flex; align-items: center; justify-content: center; }
.product-item .body { flex: 1; }
.product-item h4 { font-size: 19px; margin: 0 0 8px; color: var(--lt-navy); }
.product-item h4 small { color: var(--lt-gold); font-weight: 400; margin-left: 8px; font-size: 14px; }
.product-item .body p { color: #555; margin: 0 0 10px; }
.product-item .body ul.hl { list-style: none; margin: 0 0 12px; padding: 0; }
.product-item .body ul.hl li { position: relative; padding-left: 18px; margin-bottom: 5px; color: #555; font-size: 14.5px; line-height: 1.75; }
.product-item .body ul.hl li::before { content: ""; position: absolute; left: 1px; top: 9px; width: 7px; height: 7px; border-radius: 2px; background: var(--lt-gold); transform: rotate(45deg); }
.product-item .tags { display: flex; flex-wrap: wrap; gap: 8px; }
.product-item .tags span { background: var(--lt-gray); color: var(--lt-muted); font-size: 13px; padding: 3px 12px; border-radius: 20px; }

/* ---------- 规格目录表（花岗岩/大理石） ---------- */
.spec-table { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--lt-line); border-radius: 10px; overflow: hidden; }
.spec-table caption { caption-side: top; text-align: left; font-size: 17px; font-weight: 700; color: var(--lt-navy); padding: 0 0 12px; }
.spec-table th, .spec-table td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--lt-line); font-size: 15px; }
.spec-table thead th { background: var(--lt-primary); color: #fff; font-weight: 600; }
.spec-table tbody tr:nth-child(even) { background: var(--lt-gray); }
.spec-table tbody tr:hover { background: rgba(47,93,82,.08); }
.spec-table td .en { color: var(--lt-muted); font-size: 13px; }
.spec-table .badge-imp { font-size: 12px; color: #fff; background: var(--lt-accent); padding: 2px 8px; border-radius: 10px; margin-left: 6px; }
.spec-table .badge-cn { font-size: 12px; color: #fff; background: var(--lt-primary-bright); padding: 2px 8px; border-radius: 10px; margin-left: 6px; }

/* 表面工艺 chips */
.craft-chips { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 8px; }
.craft-chips .chip { background: #fff; border: 1px solid var(--lt-line); border-left: 3px solid var(--lt-primary); border-radius: 8px; padding: 14px 18px; flex: 1 1 220px; }
.craft-chips .chip b { color: var(--lt-navy); }
.craft-chips .chip span { display: block; color: var(--lt-muted); font-size: 13.5px; margin-top: 4px; }

/* ---------- 工程案例 ---------- */
/* 参考布局：inner-banner 标题区 + case-nav 分类导航 + case-grid 项目图集 */
.case-inner-banner { position: relative; min-height: 280px; display: flex; align-items: center; justify-content: center; text-align: center; color: #fff; overflow: hidden; background-size: cover; background-position: center; }
.case-inner-banner::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(26,40,37,.45), rgba(26,40,37,.62)); }
.case-inner-banner .text-box { position: relative; z-index: 2; }
.case-inner-banner .en { font-size: 15px; letter-spacing: 4px; opacity: .9; margin: 0 0 12px; }
.case-inner-banner .line { width: 56px; height: 2px; background: var(--lt-gold, #c8a96a); margin: 0 auto 12px; }
.case-inner-banner .txt { font-size: 26px; font-weight: 600; margin: 0; letter-spacing: 2px; }

/* 分类导航（参考 zj-justone case.html 的 case-nav 模式） */
.case-nav { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin: 36px 0 30px; }
.case-nav .item { display: inline-block; padding: 9px 22px; border-radius: 22px; font-size: 14.5px; color: var(--lt-navy); background: #fff; border: 1px solid var(--lt-line); transition: .2s; }
.case-nav .item:hover, .case-nav .item.active { background: var(--lt-primary); color: #fff; border-color: var(--lt-primary); }

.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.case-card { background: #fff; border: 1px solid var(--lt-line); border-radius: 12px; overflow: hidden; transition: .25s; }
.case-card:hover { box-shadow: 0 14px 34px rgba(33,40,37,.14); transform: translateY(-4px); }
.case-card .thumb { height: 200px; overflow: hidden; position: relative; }
.case-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.case-card:hover .thumb img { transform: scale(1.07); }
.case-card .thumb .corner { position: absolute; left: 0; top: 0; background: var(--lt-primary); color: #fff; font-size: 13px; padding: 5px 14px; border-bottom-right-radius: 10px; }
.case-card .body { padding: 18px 20px; }
.case-card .body h4 { font-size: 18px; margin: 0 0 8px; color: var(--lt-navy); }
.case-card .body p { font-size: 14.5px; color: var(--lt-muted); margin: 0 0 10px; }
.case-card .body .stone { font-size: 13px; color: var(--lt-primary); background: rgba(47,93,82,.10); padding: 3px 10px; border-radius: 20px; display: inline-block; }
.case-card .body .more { margin-top: 6px; font-size: 14px; color: var(--lt-primary); display: inline-flex; align-items: center; gap: 8px; }
.case-card .body .more .line { width: 22px; height: 2px; background: var(--lt-primary); transition: width .25s; }
.case-card:hover .body .more .line { width: 34px; }
.case-note { text-align: center; color: var(--lt-muted); font-size: 14px; margin-top: 28px; }
/* 分类筛选：隐藏态 + 空状态提示 */
.case-card.hide { display: none; }
.case-empty { display: none; text-align: center; color: var(--lt-muted); font-size: 15px; padding: 50px 0; }
.case-empty.show { display: block; }
/* 筛选标签可点击 */
.case-nav .item { cursor: pointer; }

/* 案例分类框架（保留为说明性框架，折叠在图集下方） */
.case-cat { background: #fff; border: 1px solid var(--lt-line); border-radius: 12px; padding: 26px 28px; margin-bottom: 22px; border-left: 4px solid var(--lt-primary); }
.case-cat h4 { font-size: 19px; color: var(--lt-navy); margin: 0 0 10px; display: flex; align-items: center; gap: 10px; }
.case-cat h4 .no { flex: 0 0 30px; height: 30px; border-radius: 50%; background: var(--lt-primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 15px; }
.case-cat p { color: #555; margin: 0 0 8px; }
.case-cat .meta { font-size: 14px; color: var(--lt-muted); }
.case-cat .meta b { color: var(--lt-primary); }

/* ---------- 案例详情页 case-detail ---------- */
.case-detail-banner { position: relative; min-height: 360px; display: flex; align-items: center; overflow: hidden; background-size: cover; background-position: center; }
.case-detail-banner::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(26,40,37,.40), rgba(26,40,37,.66)); }
.case-detail-banner .text-box { position: relative; z-index: 2; padding: 0 40px; max-width: 820px; }
.case-detail-banner .en { font-size: 14px; letter-spacing: 4px; color: var(--lt-gold, #c8a96a); margin: 0 0 12px; text-transform: uppercase; }
.case-detail-banner .line { width: 56px; height: 2px; background: var(--lt-gold, #c8a96a); margin: 0 0 16px; }
.case-detail-banner h1 { font-size: 38px; font-weight: 700; color: #fff; margin: 0; line-height: 1.25; text-shadow: 0 2px 16px rgba(0,0,0,.25); }
.case-detail-layout { display: grid; grid-template-columns: 1fr 320px; gap: 40px; align-items: start; }
.case-detail-main .case-detail-h2 { font-size: 22px; color: var(--lt-navy); margin: 30px 0 18px; padding-left: 14px; border-left: 4px solid var(--lt-primary); }
.case-detail-main .case-detail-h2:first-child { margin-top: 0; }
.case-meta { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.case-meta .cm { background: var(--lt-gray, #f4f5f3); border: 1px solid var(--lt-line); border-radius: 10px; padding: 14px 16px; }
.case-meta .cm .k { display: block; font-size: 13px; color: var(--lt-muted); margin-bottom: 6px; }
.case-meta .cm .v { font-size: 15.5px; color: var(--lt-navy); font-weight: 600; }
.case-desc { font-size: 15.5px; color: var(--lt-text); line-height: 1.9; margin: 0; }
.case-gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.case-gallery-item { border-radius: 12px; overflow: hidden; border: 1px solid var(--lt-line); }
.case-gallery-item img { width: 100%; height: 240px; object-fit: cover; display: block; transition: transform .5s ease; }
.case-gallery-item:hover img { transform: scale(1.05); }
.case-detail-side { position: sticky; top: 90px; }
.case-detail-side .side-box { background: #fff; border: 1px solid var(--lt-line); border-radius: 12px; overflow: hidden; margin-bottom: 18px; }
.case-detail-side .side-box .hd { background: var(--lt-primary); color: #fff; font-size: 15px; font-weight: 600; padding: 12px 18px; }
.case-detail-side .side-box .bd ul { list-style: none; margin: 0; padding: 14px 18px; }
.case-detail-side .side-box .bd li { display: flex; align-items: center; gap: 8px; font-size: 14.5px; padding: 8px 0; color: var(--lt-text); }
.case-detail-side .side-box .bd li .dot { flex: 0 0 auto; }
.case-detail-side .side-box .bd li a { color: var(--lt-primary); text-decoration: none; }
.case-detail-side .side-box .bd li a:hover { text-decoration: underline; }
@media (max-width: 900px) {
  .case-detail-layout { grid-template-columns: 1fr; }
  .case-detail-side { position: static; }
  .case-detail-banner h1 { font-size: 28px; }
}

/* ---------- 车间设备 / 生产流程 ---------- */
.workshop-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.workshop-card { background: #fff; border: 1px solid var(--lt-line); border-radius: 12px; overflow: hidden; transition: .25s; }
.workshop-card:hover { box-shadow: 0 12px 30px rgba(0,0,0,.08); }
.workshop-card .thumb { height: 220px; overflow: hidden; }
.workshop-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.workshop-card:hover .thumb img { transform: scale(1.06); }
.workshop-card .body { padding: 22px 24px; }
.workshop-card .body h4 { font-size: 18px; color: var(--lt-navy); margin: 0 0 8px; }
.workshop-card .body p { color: #555; font-size: 15px; margin: 0; }

.process-steps { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; counter-reset: step; }
.process-step { background: #fff; border: 1px solid var(--lt-line); border-radius: 10px; padding: 22px 16px; text-align: center; position: relative; }
.process-step .no { width: 40px; height: 40px; border-radius: 50%; background: var(--lt-primary); color: #fff; font-weight: 800; display: flex; align-items: center; justify-content: center; margin: 0 auto 12px; font-size: 18px; }
.process-step h5 { font-size: 15px; color: var(--lt-navy); margin: 0 0 6px; }
.process-step p { font-size: 13px; color: var(--lt-muted); margin: 0; line-height: 1.6; }

.equip-list { columns: 2; column-gap: 30px; list-style: none; padding: 0; margin: 0; }
.equip-list li { break-inside: avoid; padding: 10px 0 10px 22px; position: relative; border-bottom: 1px dashed var(--lt-line); color: #444; }
.equip-list li::before { content: ""; position: absolute; left: 0; top: 18px; width: 8px; height: 8px; border-radius: 2px; background: var(--lt-gold); transform: rotate(45deg); }

/* ---------- 新闻资讯 ---------- */
.news-layout { display: grid; grid-template-columns: 1fr 340px; gap: 36px; }
.news-list { display: flex; flex-direction: column; gap: 0; }
.news-row { display: flex; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--lt-line); align-items: flex-start; }
.news-row .date { flex: 0 0 64px; text-align: center; background: var(--lt-gray); border-radius: 8px; padding: 8px 0; }
.news-row .date .d { font-size: 22px; font-weight: 800; color: var(--lt-primary); line-height: 1; }
.news-row .date .y { font-size: 13px; color: var(--lt-muted); }
.news-row .meta { flex: 1; }
.news-row .meta a { font-size: 17px; font-weight: 600; color: var(--lt-navy); display: block; }
.news-row .meta a:hover { color: var(--lt-primary-bright); }
.news-row .meta .tag { font-size: 13px; color: var(--lt-gold); margin-right: 8px; }
.news-row .meta .brief { color: var(--lt-muted); font-size: 14px; margin-top: 4px; }
.side-box { background: #fff; border: 1px solid var(--lt-line); border-radius: 10px; overflow: hidden; }
.side-box .hd { background: var(--lt-gray); color: var(--lt-navy); padding: 12px 16px; font-weight: 700; border-bottom: 2px solid var(--lt-primary); }
.side-box .bd { padding: 8px 16px; }
.side-box .bd li { list-style: none; padding: 10px 0; border-bottom: 1px dashed var(--lt-line); font-size: 15px; display: flex; align-items: baseline; white-space: nowrap; }
.side-box .bd li:last-child { border-bottom: 0; }
.side-box .bd li a { color: #444; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; }
.side-box .bd li a:hover { color: var(--lt-primary-bright); }
.side-box .bd li .dot { color: var(--lt-primary); margin-right: 6px; flex-shrink: 0; }

.news-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card { display: flex; flex-direction: column; background: #fff; border: 1px solid var(--lt-line); border-radius: 12px; overflow: hidden; text-decoration: none; color: inherit; transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease; }
.news-card:hover { transform: translateY(-6px); box-shadow: 0 16px 36px rgba(33,40,37,.14); border-color: var(--lt-primary); }
.news-thumb { position: relative; height: 170px; overflow: hidden; display: flex; align-items: center; justify-content: center; }
.news-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.news-card:hover .news-thumb img { transform: scale(1.08); }
.news-thumb-ph { font-size: 24px; font-weight: 800; color: rgba(255,255,255,.92); letter-spacing: 2px; }
.news-thumb.cat-stone  { background: linear-gradient(135deg, #2f5d52, #244a41); }
.news-thumb.cat-industry { background: linear-gradient(135deg, #c2a15a, #a9853f); }
.news-thumb.cat-company { background: linear-gradient(135deg, #b5482e, #8f3823); }
.news-cat { position: absolute; left: 12px; top: 12px; background: rgba(255,255,255,.92); color: var(--lt-primary); font-size: 12px; font-weight: 600; padding: 3px 11px; border-radius: 20px; }
.news-body { padding: 16px 18px 20px; display: flex; flex-direction: column; flex: 1; }
.news-date { font-size: 12px; color: var(--lt-muted); margin-bottom: 8px; }
.news-title { font-size: 16px; line-height: 1.5; color: var(--lt-navy); font-weight: 700; margin: 0 0 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-card:hover .news-title { color: var(--lt-primary); }
.news-summary { font-size: 13px; color: #666; line-height: 1.7; margin: 0 0 14px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-more { margin-top: auto; font-size: 13px; font-weight: 600; color: var(--lt-primary); }

/* ---------- 联系我们 ---------- */
.contact-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; }
.contact-info .item { display: flex; gap: 14px; padding: 14px 0; border-bottom: 1px dashed var(--lt-line); }
.contact-info .item .ic { flex: 0 0 42px; height: 42px; border-radius: 50%; background: rgba(47,93,82,.10); color: var(--lt-primary); display: flex; align-items: center; justify-content: center; font-size: 18px; }
.contact-info .item .t { font-weight: 700; color: var(--lt-navy); }
.contact-info .item .v { color: #555; }
.contact-imgs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 20px; }
.contact-imgs img { width: 100%; height: 110px; object-fit: cover; border-radius: 8px; border: 1px solid var(--lt-line); }
.map-img-wrap { width: 100%; height: 340px; border: 1px solid var(--lt-line); border-radius: 10px; overflow: hidden; background: #f5f6f8; display:flex; align-items:center; justify-content:center; color: var(--lt-muted); }
.map-img { width: 100%; height: 100%; object-fit: cover; }

/* 表单 */
.contact-form .form-control { margin-bottom: 6px; border-radius: 8px; border-color: #e0e3e9; }
.contact-form .form-control:focus { border-color: var(--lt-primary); box-shadow: 0 0 0 0.2rem rgba(47,93,82,.15); }
.contact-form label { font-size: 14px; color: var(--lt-navy); font-weight: 600; margin-top: 10px; margin-bottom: 6px; }
.contact-form .invalid-feedback { display: none; color: var(--lt-accent); font-size: 12px; margin-bottom: 8px; }
.contact-form .is-invalid ~ .invalid-feedback[data-field] { display: block; }
.contact-form .is-invalid { border-color: var(--lt-accent); }
.cf-hp { position: absolute !important; left: -9999px; top: -9999px; width: 1px; height: 1px; opacity: 0; overflow: hidden; }

/* ---------- 视频展示 ---------- */
.video-wrap { position: relative; width: 100%; max-width: 920px; margin: 0 auto; aspect-ratio: 16 / 9; border-radius: 12px; overflow: hidden; background: var(--lt-navy); border: 1px solid var(--lt-line); }
.video-wrap video { width: 100%; height: 100%; display: block; object-fit: cover; background: #000; }

/* CTA 横幅（含视频） */
.cta-banner { display: flex; align-items: center; gap: 40px; background: #fff; border: 1px solid var(--lt-line); border-radius: 18px; overflow: hidden; padding: 44px 48px; color: var(--lt-text); box-shadow: 0 18px 50px rgba(0,0,0,.08); }
.cta-banner .txt { flex: 1; min-width: 0; }
.cta-banner .tag { display: inline-block; font-size: 13px; letter-spacing: 2px; color: var(--lt-gold); border: 1px solid rgba(194,161,90,.5); padding: 3px 12px; border-radius: 20px; margin-bottom: 14px; }
.cta-banner h2 { color: var(--lt-navy); font-size: 28px; font-weight: 800; margin-bottom: 12px; line-height: 1.3; }
.cta-banner p { color: var(--lt-muted); font-size: 15px; line-height: 1.85; margin-bottom: 22px; }
.cta-banner .media { flex: 0 0 420px; border-radius: 12px; overflow: hidden; box-shadow: 0 10px 30px rgba(0,0,0,.18); background: #000; }
.cta-banner .media video { width: 100%; height: auto; aspect-ratio: 16/9; display: block; object-fit: cover; }

/* ---------- 页脚 ---------- */
.footer { background: #f8f9fa; color: #555; padding: 48px 0 0; border-top: 1px solid var(--lt-line); }
.footer .container { display: grid; grid-template-columns: 1.5fr 1fr 1fr minmax(260px, 1.1fr); gap: 30px; }
html[lang="en"] .footer .container { grid-template-columns: 2.5fr 1fr 1fr minmax(260px, 1.1fr); }
.footer h5 { color: var(--lt-navy); font-size: 16px; margin: 0 0 16px; position: relative; padding-left: 12px; text-align: left; }
.footer h5::before { content: ""; position: absolute; left: 0; top: 3px; bottom: 3px; width: 3px; background: var(--lt-gold); }
.footer a { color: var(--lt-muted); display: block; padding: 5px 0; font-size: 14px; }
.footer a:hover { color: var(--lt-primary); }
.footer .f-about .logo { height: 50px; width: 50px; border-radius: 10px; background: linear-gradient(135deg, var(--lt-primary), var(--lt-primary-dark)); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 22px; font-weight: 800; margin-bottom: 14px; }
.footer .f-about p { font-size: 14px; line-height: 1.9; }
.footer .f-qr { text-align: left; }
.footer .f-qr .f-info { font-size: 14px; line-height: 1.75; margin: 0 0 18px; }
.footer .f-qr .f-info p { margin: 0 0 7px; color: #555; overflow-wrap: break-word; word-wrap: break-word; }
.footer .f-qr .f-info p:last-child { margin-bottom: 0; }
.footer .f-qr .f-qr-card { display: flex; align-items: center; gap: 14px; background: #fff; border: 1px solid var(--lt-line); border-radius: 10px; padding: 12px; }
.footer .f-qr .f-qr-card img { width: 90px; height: 90px; border-radius: 6px; background: #fff; padding: 0; margin: 0; flex: 0 0 90px; }
.footer .f-qr .f-qr-text { display: flex; flex-direction: column; gap: 4px; }
.footer .f-qr .f-qr-text b { font-size: 14px; color: var(--lt-navy); }
.footer .f-qr .f-qr-text span { font-size: 12px; color: var(--lt-muted); line-height: 1.5; }
.footer .bottom { border-top: 1px solid var(--lt-line); margin-top: 36px; padding: 16px 0; text-align: center; font-size: 13px; color: var(--lt-muted); }
.footer .bottom a { display: inline; color: var(--lt-muted); }

/* 返回顶部 */
#toTop { position: fixed; right: 22px; bottom: 30px; width: 46px; height: 46px; border-radius: 50%; background: var(--lt-primary); color: #fff; border: 0; font-size: 20px; cursor: pointer; display: none; z-index: 99; box-shadow: 0 6px 18px rgba(47,93,82,.4); }

/* ---------- 品牌按钮 ---------- */
.btn-brand { background: var(--lt-primary); color: #fff; border: none; transition: background .2s, transform .15s, box-shadow .2s; }
.btn-brand:hover { background: var(--lt-primary-dark); color: #fff; transform: translateY(-1px); box-shadow: 0 6px 20px rgba(47,93,82,.3); }
.btn-outline-brand { background: transparent; color: var(--lt-primary); border: 1.5px solid var(--lt-primary); transition: all .2s; }
.btn-outline-brand:hover { background: var(--lt-primary); color: #fff; transform: translateY(-1px); box-shadow: 0 6px 20px rgba(47,93,82,.2); }
.btn-accent { background: var(--lt-accent); color: #fff; border: none; }
.btn-accent:hover { background: var(--lt-accent-dark); color: #fff; }

/* ---------- 滚动渐入 ---------- */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity .65s cubic-bezier(.22,.61,.36,1), transform .65s cubic-bezier(.22,.61,.36,1); will-change: opacity, transform; }
.reveal.in { opacity: 1; transform: none; }
.reveal-fade { opacity: 0; }
.reveal-fade.in { opacity: 1; }

/* 工具类 */
.no-break { white-space: nowrap; }
.lead-text { font-size: 17px; color: #444; line-height: 1.9; }
.text-brand { color: var(--lt-primary) !important; }
.text-accent { color: var(--lt-accent) !important; }

/* ---------- 响应式 ---------- */
@media (max-width: 992px) {
  .svc-grid, .gallery-grid, .case-grid, .news-cards { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(3, 1fr); }
  .news-layout { grid-template-columns: 1fr; }
  .workshop-grid { grid-template-columns: 1fr; }
  .footer .container { grid-template-columns: 1fr 1fr; }
  .about-home .stats { grid-template-columns: repeat(4,1fr); }
  .cta-banner { flex-direction: column; padding: 32px 24px; text-align: center; }
  .cta-banner .media { flex: none; width: 100%; max-width: 420px; }
}
@media (max-width: 768px) {
  .header .container { flex-wrap: wrap; padding: 12px 15px; }
  .header .logo { height: 48px; width: 48px; font-size: 22px; }
  .header .brand .name { font-size: 18px; }
  .header .hotline { width: 100%; text-align: left; margin: 6px 0 0; }
  .nav-toggle { display: block; }
  .navbar-lt .container { flex-wrap: wrap; position: relative; }
  .nav-lt { display: none; flex-direction: column; width: 100%; background: #fff; }
  .nav-lt.open { display: flex; }
  .nav-lt > li { width: 100%; }
  .nav-lt > li > a { height: 46px; justify-content: space-between; }
  .nav-lt > li > a::after { display: none; }
  .nav-lt .dropdown-menu-lt { position: static; box-shadow: none; display: none; width: 100%; border-top: 0; }
  .nav-lt > li.open .dropdown-menu-lt { display: block; }
  .nav-lt .dropdown-menu-lt a { color: var(--lt-navy); background: var(--lt-gray); padding-left: 40px; }
  .hero .carousel-item { height: 320px; }
  .hero .carousel-caption { width: 92%; top: 52%; }
  .hero .carousel-caption h2 { font-size: 26px; }
  .hero .carousel-caption p { font-size: 15px; }
  .section { padding: 44px 0; }
  .section-title h2 { font-size: 26px; }
  .about-home .stats { grid-template-columns: repeat(2,1fr); }
  .svc-grid, .gallery-grid, .case-grid, .news-cards { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .contact-wrap { grid-template-columns: 1fr; }
  .equip-list { columns: 1; }
  .footer .container { grid-template-columns: 1fr; }
  .product-item { flex-direction: column; gap: 14px; }
  .spec-table { display: block; overflow-x: auto; white-space: nowrap; }
}
@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal-fade { opacity: 1 !important; transform: none !important; transition: none !important; }
  .hero .carousel-item::before { transition: none; transform: none; }
  .hero .carousel-caption > * { opacity: 1 !important; transform: none !important; transition: none !important; }
}

/* ---------- 新闻动态（API 动态加载） ---------- */
.news-loading, .news-error { padding: 28px 0; text-align: center; color: var(--lt-muted); font-size: 15px; }
.news-error { color: var(--lt-accent); }

/* 新闻分页 */
.pager-wrap { margin: 28px 0 8px; }
.pager { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; justify-content: space-between; }
.pager-info { font-size: 14px; color: var(--lt-muted); }
.pager-nav { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.pager-nav a {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 38px; height: 38px; padding: 0 12px;
  border: 1px solid var(--lt-line); border-radius: 8px;
  background: #fff; color: var(--lt-navy); font-size: 14px; font-weight: 600;
  text-decoration: none; cursor: pointer; transition: all .15s ease;
}
.pager-nav a:hover { border-color: var(--lt-primary); color: var(--lt-primary); }
.pager-nav a.active { background: var(--lt-primary); border-color: var(--lt-primary); color: #fff; cursor: default; }
.pager-nav a.disabled { color: #c2c8d0; border-color: var(--lt-line); cursor: not-allowed; background: #f7f8fa; }
.pager-nav a.disabled:hover { color: #c2c8d0; border-color: var(--lt-line); }

/* ---------- 新闻详情 ---------- */
.article-detail { max-width: 860px; margin: 0 auto; }
.article-detail .loading { padding: 40px 0; text-align: center; color: var(--lt-muted); }
.article-title { font-size: 30px; color: var(--lt-navy); margin: 6px 0 14px; line-height: 1.35; }
.article-meta { display: flex; flex-wrap: wrap; gap: 18px; color: var(--lt-muted); font-size: 14px; padding-bottom: 16px; margin-bottom: 22px; border-bottom: 1px solid var(--lt-line); }
.article-content { font-size: 16px; line-height: 1.9; color: #333; }
.article-content h2 { font-size: 22px; color: var(--lt-navy); margin: 28px 0 12px; }
.article-content h3 { font-size: 19px; color: var(--lt-navy); margin: 22px 0 10px; }
.article-content p { margin: 0 0 16px; }
.article-content img { max-width: 100%; height: auto; border-radius: 10px; margin: 12px 0; }
.article-content ul { padding-left: 22px; margin: 0 0 16px; }
.article-content li { margin: 6px 0; }
.article-content figure { margin: 16px 0; }
.article-content figure img { margin: 0; }
.article-pn { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin: 32px 0 24px; }
.article-pn .pn { flex: 1 1 45%; min-width: 0; color: var(--lt-navy); background: var(--lt-gray); border: 1px solid var(--lt-line); border-radius: 10px; padding: 14px 16px; font-size: 15px; }
.article-pn .pn:hover { color: var(--lt-primary); border-color: var(--lt-primary); }
.article-pn .next { text-align: right; }
.article-back { margin-top: 8px; }

/* ---------- 联系表单（API 提交） ---------- */
.cf-error { display: none; background: #fff3f1; border: 1px solid #f3c2b8; color: var(--lt-accent); border-radius: 10px; padding: 12px 14px; margin-top: 14px; font-size: 14px; }
.cf-error.is-visible { display: block; }
.btn[disabled] { opacity: .65; cursor: not-allowed; }