/* ============================================================
   dtdc3 道路元素风 — 正式主题样式（响应式单套，PC/移动共用）
   沥青 #23272b / 标线黄 #f7b500 / 车牌蓝 #1d4fa1 / 混凝土 #f4f4f1
   母题：车牌标签(.dt3-plate) · 车道虚线(.dt3-lane) · 页脚警示斜纹
   ============================================================ */
:root {
    --dt3-asphalt: #23272b;
    --dt3-asphalt-deep: #1a1d21;
    --dt3-asphalt-soft: #2e3338;
    --dt3-yellow: #f7b500;
    --dt3-yellow-deep: #d99e00;
    --dt3-plate: #1d4fa1;
    --dt3-plate-deep: #173e80;
    --dt3-concrete: #f4f4f1;
    --dt3-card: #ffffff;
    --dt3-text: #23272b;
    --dt3-sub: #5b6166;
    --dt3-line: #e4e4df;
    --dt3-w: 1160px;
    --dt3-ease: cubic-bezier(.22, .68, .32, 1);
    --dt3-shadow: 0 1px 2px rgba(26,29,33,.04), 0 12px 30px -18px rgba(26,29,33,.22);
    --dt3-shadow-up: 0 2px 6px rgba(26,29,33,.08), 0 26px 44px -18px rgba(26,29,33,.34);
}
* { box-sizing: border-box; }
body.dt3 {
    margin: 0;
    background: var(--dt3-concrete);
    color: var(--dt3-text);
    font: 15px/1.7 "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
}
.dt3 a { color: inherit; text-decoration: none; }
.dt3 img { max-width: 100%; display: block; }
.dt3 ul, .dt3 h1, .dt3 h2, .dt3 h3, .dt3 h4, .dt3 p { margin: 0; padding: 0; }
.dt3 li { list-style: none; }
.dt3 a:focus-visible, .dt3 button:focus-visible, .dt3 input:focus-visible { outline: 3px solid var(--dt3-yellow); outline-offset: 2px; }
.dt3-wrap { width: var(--dt3-w); max-width: calc(100% - 32px); margin: 0 auto; }
.dt3-main { overflow-x: hidden; }

/* ---------- 母题：车牌标签 ---------- */
.dt3-plate {
    display: inline-flex;
    align-items: center;
    background: var(--dt3-plate);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .18em;
    text-transform: uppercase;
    padding: 4px 12px;
    border-radius: 6px;
    box-shadow: inset 0 0 0 2px rgba(255,255,255,.85), inset 0 0 0 3px var(--dt3-plate);
}
.dt3-lane {
    width: 200px; height: 4px;
    border-radius: 2px;
    background: repeating-linear-gradient(90deg, var(--dt3-yellow) 0 24px, transparent 24px 40px);
}

/* ---------- 顶部细条 ---------- */
.dt3-topbar { background: var(--dt3-asphalt-deep); color: #9aa2ab; font-size: 13px; line-height: 36px; }
.dt3-topbar .dt3-wrap { display: flex; justify-content: space-between; gap: 12px; }
.dt3-topbar a { color: #c6ccd4; margin-right: 14px; }
.dt3-topbar a:hover { color: var(--dt3-yellow); }
.dt3-topbar span { color: #c6ccd4; }

/* ---------- 页头 ---------- */
.dt3-head { background: #fff; border-bottom: 1px solid var(--dt3-line); }
.dt3-head-in { display: flex; align-items: center; justify-content: space-between; padding: 18px 0; gap: 12px; }
.dt3-brand { display: flex; align-items: center; gap: 14px; min-width: 0; }
/* 品牌记号：黄色圆角方 + 车道双箭头（纯 CSS） */
.dt3-brand-mark { flex: none; width: 52px; height: 52px; border-radius: 12px; background: var(--dt3-yellow); position: relative; overflow: hidden; }
.dt3-brand-logo { flex: none; }
.dt3-brand-logo img {
    display: block; height: 52px; width: auto; max-width: 200px;
    object-fit: contain; border-radius: 8px;
}
.dt3-brand-mark::before, .dt3-brand-mark::after {
    content: ""; position: absolute; top: 50%;
    width: 26px; height: 5px; border-radius: 3px;
    background: var(--dt3-asphalt); transform: translateY(-50%);
}
.dt3-brand-mark::before { left: 9px; }
.dt3-brand-mark::after { right: 9px; }
.dt3-brand-mark i {
    position: absolute; top: 50%; left: 50%;
    width: 0; height: 0; transform: translate(-50%, -50%);
    border: 8px solid transparent; border-left: 12px solid var(--dt3-asphalt);
    margin-left: 2px;
}
.dt3-brand b { font-size: 21px; font-weight: 800; letter-spacing: 1px; display: block; line-height: 1.3; white-space: nowrap; }
.dt3-brand span { display: block; font-size: 11px; color: var(--dt3-sub); letter-spacing: 1.5px; }
.dt3-head-tel { text-align: right; flex: none; }
.dt3-head-tel .lb { display: block; font-size: 13px; color: var(--dt3-sub); }
.dt3-head-tel .num {
    display: block; font-size: 23px; font-weight: 800; color: var(--dt3-asphalt);
    font-variant-numeric: tabular-nums; border-bottom: 3px solid var(--dt3-yellow); line-height: 1.35;
    white-space: nowrap;
}
/* 汉堡：桌面隐藏 */
.dt3-menu-btn {
    display: none; flex: none; width: 44px; height: 44px;
    border: 1px solid var(--dt3-line); border-radius: 10px; background: #fff;
    cursor: pointer; position: relative; padding: 0;
}
.dt3-menu-btn i, .dt3-menu-btn::before, .dt3-menu-btn::after {
    content: ""; position: absolute; left: 50%;
    width: 20px; height: 2px; border-radius: 1px;
    background: var(--dt3-asphalt); transform: translateX(-50%);
    transition: transform .25s var(--dt3-ease), opacity .2s;
}
.dt3-menu-btn::before { top: 13px; }
.dt3-menu-btn i { top: 21px; }
.dt3-menu-btn::after { top: 29px; }
.dt3-menu-btn.is-open::before { transform: translateX(-50%) translateY(8px) rotate(45deg); }
.dt3-menu-btn.is-open i { opacity: 0; }
.dt3-menu-btn.is-open::after { transform: translateX(-50%) translateY(-8px) rotate(-45deg); }

/* ---------- 导航：沥青条 + 标线黄虚线 ---------- */
.dt3-navbox { position: relative; }
.dt3-nav { background: var(--dt3-asphalt); }
.dt3-nav > .dt3-wrap > ul { display: flex; }
.dt3-nav a { display: block; padding: 0 24px; line-height: 48px; font-size: 16px; color: #e8eaed; position: relative; transition: color .2s; white-space: nowrap; }
.dt3-nav .dt3-top > a::after {
    content: ""; position: absolute; left: 22px; right: 22px; bottom: 0; height: 3px;
    background: repeating-linear-gradient(90deg, var(--dt3-yellow) 0 14px, transparent 14px 22px);
    transform: scaleX(0); transform-origin: left;
    transition: transform .25s var(--dt3-ease);
}
.dt3-nav .dt3-top > a:hover, .dt3-nav .dt3-top.is-active > a { color: var(--dt3-yellow); }
.dt3-nav .dt3-top > a:hover::after, .dt3-nav .dt3-top.is-active > a::after { transform: scaleX(1); }
/* 下拉子菜单 */
.dt3-nav li.dt3-top { position: relative; }
.dt3-sub {
    display: none;
    position: absolute; left: 0; top: 100%; z-index: 40;
    min-width: 176px;
    background: var(--dt3-asphalt-soft);
    box-shadow: 0 16px 30px -10px rgba(0,0,0,.45);
    border-top: 3px solid var(--dt3-yellow);
}
.dt3-nav li:hover > .dt3-sub { display: block; }
.dt3-sub li { position: relative; }
.dt3-sub a { line-height: 42px; padding: 0 18px; border-bottom: 1px solid rgba(255,255,255,.06); }
.dt3-sub .dt3-sub { left: 100%; top: 0; border-top: 0; }
.dt3-arrow { font-size: 10px; margin-left: 4px; opacity: .7; }
/* 吸顶 */
.dt3-nav.is-fixed { position: fixed; left: 0; right: 0; top: 0; z-index: 90; background: linear-gradient(90deg, var(--dt3-asphalt-deep), var(--dt3-asphalt-soft)); box-shadow: 0 8px 24px -8px rgba(0,0,0,.5); }

/* ---------- Hero：轮播压图 + 文案层 ---------- */
.dt3-hero { position: relative; background: var(--dt3-asphalt-deep); overflow: hidden; }
.dt3-bn-slide { position: absolute; inset: 0; opacity: 0; transition: opacity .8s ease; }
.dt3-bn-slide.is-on { opacity: 1; }
.dt3-bn-slide img { width: 100%; height: 100%; object-fit: cover; object-position: 0% 50%; }
.dt3-hero::after {
    content: ""; position: absolute; inset: 0; pointer-events: none;
    background:
        linear-gradient(to top, rgba(26,29,33,.5) 0%, rgba(26,29,33,0) 40%),
        linear-gradient(100deg, rgba(20,23,26,.72) 0%, rgba(26,29,33,.4) 38%, rgba(35,39,43,.05) 92%);
}
.dt3-hero-in { position: relative; z-index: 2; padding: 76px 0 64px; color: #fff; }
/* 公司名：车牌式徽标（蓝底白字+白内框），自带底衬压图 */
.dt3-hero-tag {
    display: inline-block; padding: 6px 16px;
    background: #1d4fa1; color: #fff;
    font-size: 13px; font-weight: 700; letter-spacing: 3px;
    border-radius: 6px;
    box-shadow: inset 0 0 0 2px rgba(255,255,255,.9), 0 6px 16px -4px rgba(0,0,0,.4);
}
.dt3-hero h1 { font-size: 44px; font-weight: 800; letter-spacing: 2px; line-height: 1.25; margin: 12px 0 16px; text-shadow: 0 2px 10px rgba(0,0,0,.9), 0 0 30px rgba(0,0,0,.45); }
.dt3-hero h1 em { font-style: normal; color: var(--dt3-yellow); }
.dt3-hero .dt3-lead { font-size: 17px; color: #e2e5e9; margin-bottom: 30px; text-shadow: 0 1px 8px rgba(0,0,0,.9), 0 0 24px rgba(0,0,0,.45); }
.dt3-hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.dt3-btn {
    display: inline-flex; align-items: center; gap: 8px;
    height: 50px; padding: 0 30px; border-radius: 999px;
    font-size: 16px; font-weight: 700; cursor: pointer; border: 0;
    transition: transform .22s var(--dt3-ease), box-shadow .22s, background .22s, border-color .22s;
}
/* 选择器统一写成 .dt3 a.xxx：全局第 32 行 `.dt3 a{color:inherit}` 特异性更高，
   只写 .xxx 时按钮文字色会被父级继承色抢走（黄底白字、黑底深字等不可读组合） */
.dt3 a.dt3-btn-main { background: var(--dt3-yellow); color: var(--dt3-asphalt); box-shadow: 0 10px 26px -10px rgba(247,181,0,.55); }
.dt3 a.dt3-btn-main:hover { background: var(--dt3-yellow-deep); color: var(--dt3-asphalt); transform: translateY(-2px); }
.dt3 a.dt3-btn-ghost { border: 2px solid rgba(255,255,255,.5); color: #fff; background: transparent; }
.dt3 a.dt3-btn-ghost:hover { border-color: var(--dt3-yellow); color: var(--dt3-yellow); transform: translateY(-2px); }
.dt3-hero-stats { display: flex; gap: 16px; margin-top: 44px; flex-wrap: wrap; }
.dt3-stat {
    min-width: 168px;
    background: rgba(38,42,47,.5);
    border: 1px solid rgba(255,255,255,.18);
    border-left: 4px solid var(--dt3-yellow);
    border-radius: 12px; padding: 16px 22px;
    backdrop-filter: blur(4px);
}
.dt3-stat b { display: block; font-size: 30px; font-weight: 800; color: var(--dt3-yellow); line-height: 1.2; font-variant-numeric: tabular-nums; }
.dt3-stat b i { font-style: normal; font-size: 14px; font-weight: 600; color: #e8eaed; margin-left: 2px; }
.dt3-stat span { display: block; font-size: 13px; color: #c8cdd4; margin-top: 4px; }
/* 轮播圆点 */
.dt3-bn-dots { position: absolute; z-index: 3; right: 24px; bottom: 18px; display: flex; gap: 8px; }
.dt3-bn-dots button {
    width: 12px; height: 12px; padding: 0; border-radius: 50%;
    border: 0; cursor: pointer;
    background: rgba(255,255,255,.55); box-shadow: 0 1px 4px rgba(0,0,0,.3);
}
.dt3-bn-dots button.is-on { background: var(--dt3-yellow); }
/* 轮播标题角标 */
.dt3-bn-cap {
    position: absolute; z-index: 2; right: 0; bottom: 0;
    background: rgba(26,29,33,.45); color: #fff;
    font-size: 13px; padding: 8px 18px 8px 22px;
    border-left: 4px solid var(--dt3-yellow);
    border-radius: 8px 0 0 0;
}

/* ---------- 区块通用 ---------- */
.dt3-sec { padding: 52px 0 8px; }
.dt3-sec-hd { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 26px; }
.dt3-sec-hd .dt3-t { font-size: 26px; font-weight: 800; letter-spacing: 1px; }
.dt3-sec-hd .dt3-t em { display: block; font-style: normal; font-size: 12px; color: var(--dt3-sub); letter-spacing: 3px; margin-top: 6px; text-transform: uppercase; font-weight: 400; }
.dt3-more { flex: none; font-size: 14px; color: var(--dt3-sub); padding-bottom: 4px; border-bottom: 2px solid transparent; transition: color .2s, border-color .2s; white-space: nowrap; }
.dt3-more:hover { color: var(--dt3-asphalt); border-color: var(--dt3-yellow); }
.dt3-sec-tint { background: var(--dt3-card); border-radius: 16px; padding: 36px 28px 26px; margin-top: 24px; box-shadow: var(--dt3-shadow); }
.dt3-sec-tint .dt3-sec-hd { margin-bottom: 22px; }

/* ---------- 双列新闻行 ---------- */
.dt3-cols { display: flex; gap: 44px; }
.dt3-col { flex: 1; min-width: 0; }
.dt3-news-card { background: var(--dt3-card); border-radius: 14px; padding: 8px 22px; box-shadow: var(--dt3-shadow); }
.dt3-news-row { display: flex; align-items: center; gap: 12px; padding: 14px 2px; border-bottom: 1px dashed var(--dt3-line); }
.dt3-news-card .dt3-news-row:last-child { border-bottom: 0; }
.dt3-news-row::before { content: ""; flex: none; width: 8px; height: 8px; border-radius: 2px; background: var(--dt3-line); transition: background .2s; }
.dt3-news-row:hover::before { background: var(--dt3-yellow); }
.dt3-news-t { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; transition: color .2s; font-size: 16px; font-weight: 400; line-height: 1.5; }
.dt3-news-row:hover .dt3-news-t { color: var(--dt3-plate); }
.dt3-news-date { flex: none; color: var(--dt3-sub); font-size: 14px; font-variant-numeric: tabular-nums; }
.dt3-news-hits { flex: none; color: #767676; font-size: 14px; width: 52px; text-align: right; }
.dt3-news-hits i { margin-right: 3px; }

/* ---------- 服务范围卡片 ---------- */
.dt3-grid { display: flex; flex-wrap: wrap; gap: 22px; }
.dt3-svc {
    width: calc((100% - 66px) / 4);
    background: var(--dt3-card); border-radius: 14px; overflow: hidden;
    box-shadow: var(--dt3-shadow);
    transition: transform .3s var(--dt3-ease), box-shadow .3s var(--dt3-ease);
}
.dt3-svc:hover { transform: translateY(-6px); box-shadow: var(--dt3-shadow-up); }
.dt3-svc img { height: 170px; width: 100%; object-fit: cover; }
.dt3-svc-bd { padding: 16px 18px 20px; }
.dt3-svc-bd h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.dt3-svc-bd p { font-size: 13px; color: var(--dt3-sub); line-height: 1.8; min-height: 72px; }
.dt3-svc-bd .dt3-svc-m { margin-top: 10px; padding-top: 10px; border-top: 1px dashed var(--dt3-line); color: #5f6d80; font-size: 13px; display: flex; gap: 16px; }
.dt3-svc-bd .dt3-svc-m i { margin-right: 4px; }

/* ---------- 列表页卡片 ---------- */
.dt3-page-hd { display: flex; align-items: center; gap: 14px; margin: 26px 0 20px; }
.dt3-page-hd .dt3-t { font-size: 22px; font-weight: 800; letter-spacing: 1px; }
.dt3-page-hd .dt3-more { color: var(--dt3-sub); border: 0; font-size: 14px; }
.dt3-lcard {
    width: calc((100% - 22px) / 2);
    background: var(--dt3-card); border-radius: 14px; overflow: hidden;
    box-shadow: var(--dt3-shadow);
    transition: transform .3s var(--dt3-ease), box-shadow .3s var(--dt3-ease);
    display: flex; flex-direction: column;
}
.dt3-lcard:hover { transform: translateY(-6px); box-shadow: var(--dt3-shadow-up); }
.dt3-lcard img.dt3-card-img { width: 100%; height: 210px; object-fit: cover; }
.dt3-lcard-bd { padding: 16px 20px 18px; display: flex; flex-direction: column; flex: 1; }
.dt3-lcard-t { font-size: 17px; font-weight: 700; line-height: 1.5; margin-bottom: 8px; transition: color .2s; display: block; }
.dt3-lcard-t:hover { color: var(--dt3-plate); }
.dt3-lcard-d { font-size: 13px; color: var(--dt3-sub); line-height: 1.8; flex: 1; }
.dt3-lcard-m { margin-top: 12px; padding-top: 10px; border-top: 1px dashed var(--dt3-line); color: #5f6d80; font-size: 13px; display: flex; gap: 18px; }
.dt3-lcard-m i { margin-right: 4px; }

/* ---------- 分页（CMS 输出 ul.pagination > li > a 三层结构） ---------- */
.dt3-pager { margin: 26px 0 30px; text-align: center; }
.dt3-pager ul.pagination {
    list-style: none; margin: 0; padding: 0;
    display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 8px;
}
.dt3-pager ul.pagination li { margin: 0; background: none; padding: 0; }
.dt3-pager a, .dt3-pager span {
    display: inline-flex; align-items: center; justify-content: center;
    min-width: 38px; height: 38px; padding: 0 12px;
    border-radius: 10px; background: var(--dt3-card); border: 1px solid var(--dt3-line);
    color: var(--dt3-sub); font-size: 14px;
}
.dt3-pager a:hover { border-color: var(--dt3-yellow); color: var(--dt3-asphalt); }
.dt3-pager li.active a, .dt3-pager li.current a,
.dt3-pager a.active, .dt3-pager a.current {
    background: var(--dt3-asphalt); border-color: var(--dt3-asphalt); color: var(--dt3-yellow); font-weight: 700;
}
.dt3-pager select, .dt3-pager input { height: 38px; border: 1px solid var(--dt3-line); border-radius: 10px; padding: 0 10px; }

/* ---------- 检测流程 ---------- */
.dt3-steps { display: flex; gap: 18px; }
.dt3-step {
    flex: 1; min-width: 0;
    background: var(--dt3-card); border-radius: 14px;
    padding: 24px 16px 22px; text-align: center; position: relative;
    box-shadow: var(--dt3-shadow);
    transition: transform .3s var(--dt3-ease), box-shadow .3s var(--dt3-ease);
}
.dt3-step:hover { transform: translateY(-5px); box-shadow: 0 2px 6px rgba(26,29,33,.08), 0 24px 42px -18px rgba(26,29,33,.32); }
.dt3-step:not(:last-child)::after {
    content: ""; position: absolute; right: -18px; top: 58px; width: 18px; height: 3px;
    background: repeating-linear-gradient(90deg, var(--dt3-yellow) 0 6px, transparent 6px 11px);
}
.dt3-step-n {
    width: 44px; height: 44px; margin: 0 auto 12px; border-radius: 50%;
    background: var(--dt3-asphalt); color: var(--dt3-yellow);
    font-size: 17px; font-weight: 800;
    display: flex; align-items: center; justify-content: center;
    font-variant-numeric: tabular-nums; border: 3px solid var(--dt3-yellow);
}
.dt3-step h3 { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.dt3-step p { font-size: 13px; color: var(--dt3-sub); line-height: 1.75; }

/* ---------- 车牌蓝色带：质量方针 ---------- */
.dt3-band { background: linear-gradient(120deg, var(--dt3-plate-deep), var(--dt3-plate)); color: #fff; padding: 46px 0; margin-top: 52px; }
.dt3-band-grid { display: flex; gap: 20px; }
.dt3-band-item {
    flex: 1; border: 1px solid rgba(255,255,255,.22);
    box-shadow: inset 0 0 0 1px rgba(255,255,255,.28);
    border-radius: 10px; padding: 18px 22px; background: rgba(255,255,255,.05);
}
.dt3-band-item h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.dt3-band-item .dt3-mini {
    display: inline-block; background: var(--dt3-yellow); color: var(--dt3-asphalt);
    font-size: 11px; font-weight: 800; border-radius: 4px; padding: 1px 7px;
    margin-right: 8px; letter-spacing: .1em;
}
.dt3-band-item p { font-size: 13px; line-height: 1.85; color: #ccd9ee; }

/* ---------- 关于我们 ---------- */
.dt3-about { display: flex; gap: 34px; background: var(--dt3-card); border-radius: 16px; padding: 26px; box-shadow: var(--dt3-shadow); }
.dt3-about-img { flex: 0 0 40%; border-radius: 12px; overflow: hidden; }
.dt3-about-img img { height: 300px; width: 100%; object-fit: cover; }
.dt3-about-txt { flex: 1; min-width: 0; font-size: 15px; color: #4a5057; line-height: 1.95; text-align: justify; }
.dt3-about-txt p { margin-bottom: 12px; }
.dt3-about-txt p:first-child { color: var(--dt3-text); font-size: 16px; }

/* ---------- 内页横幅：沥青渐变 + 车道虚线（不用图） ---------- */
.dt3-ibn { background: linear-gradient(100deg, var(--dt3-asphalt-deep) 0%, var(--dt3-asphalt-soft) 100%); color: #fff; padding: 40px 0 36px; }
.dt3-ibn .dt3-lane { width: 160px; margin-bottom: 18px; background: repeating-linear-gradient(90deg, var(--dt3-yellow) 0 22px, transparent 22px 36px); }
.dt3-ibn .dt3-ibn-t { font-size: 30px; font-weight: 800; letter-spacing: 2px; line-height: 1.35; }
.dt3-ibn h1 { font-size: 30px; font-weight: 800; letter-spacing: 2px; line-height: 1.35; }
.dt3-crumb { margin-top: 10px; font-size: 13px; color: #a7aeb7; }
.dt3-crumb a:hover { color: var(--dt3-yellow); }
.dt3-crumb .dt3-sep { margin: 0 8px; color: rgba(255,255,255,.3); }

/* ---------- 详情页 ---------- */
.dt3-article { background: var(--dt3-card); border-radius: 16px; padding: 34px 38px; margin-top: 30px; box-shadow: var(--dt3-shadow); }
.dt3-article .dt3-show-t { font-size: 24px; font-weight: 800; line-height: 1.5; }
.dt3-show-meta { display: flex; gap: 18px; font-size: 13px; color: var(--dt3-sub); padding: 14px 0 18px; border-bottom: 1px dashed var(--dt3-line); margin-bottom: 22px; font-variant-numeric: tabular-nums; }
.dt3-show-meta i { margin-right: 4px; }
.neirong { font-size: 15px; color: #3c4249; line-height: 2; word-break: break-word; }
.neirong p { margin: 0 0 14px; }
.neirong img { border-radius: 12px; margin: 18px auto; max-width: 100%; height: auto; }
.neirong h2, .neirong h3 { font-size: 17px; font-weight: 700; margin: 20px 0 10px; padding-left: 12px; border-left: 4px solid var(--dt3-yellow); line-height: 1.6; }
.dt3-prevnext { display: flex; justify-content: space-between; gap: 20px; margin-top: 26px; padding-top: 18px; border-top: 1px dashed var(--dt3-line); font-size: 14px; color: var(--dt3-sub); }
.dt3-prevnext a { color: var(--dt3-plate); }
.dt3-prevnext a:hover { text-decoration: underline; }
.dt3-rel { margin-top: 30px; }
.dt3-rel-hd { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.dt3-rel-hd b, .dt3-rel-hd h3 { font-size: 19px; font-weight: 800; }
.dt3-rel .dt3-news-card { padding: 4px 22px; }
/* 注意：选择器必须写成 .dt3 a.dt3-back —— 全局第 32 行 `.dt3 a{color:inherit}` 特异性更高，
   只写 .dt3-back 时文字色会被继承色抢走，导致黑底深字完全看不见 */
.dt3 a.dt3-back {
    display: inline-block; margin-top: 20px; padding: 10px 26px; border-radius: 999px;
    background: var(--dt3-asphalt); color: #fff; font-weight: 700; font-size: 14px;
    transition: transform .2s var(--dt3-ease), background .2s;
}
.dt3 a.dt3-back:hover { background: var(--dt3-asphalt-soft); color: #fff; transform: translateY(-2px); }

/* ---------- 单页 / 栏目聚合 ---------- */
.dt3-page-stats { display: flex; gap: 14px; margin: 26px 0 0; flex-wrap: wrap; }
.dt3-ps {
    flex: 1; min-width: 150px;
    background: var(--dt3-card); border-radius: 12px; padding: 16px 20px;
    border-left: 4px solid var(--dt3-yellow); box-shadow: var(--dt3-shadow);
}
.dt3-ps b { display: block; font-size: 26px; font-weight: 800; color: var(--dt3-asphalt); font-variant-numeric: tabular-nums; line-height: 1.25; }
.dt3-ps b i { font-style: normal; font-size: 13px; font-weight: 600; color: var(--dt3-sub); margin-left: 2px; }
.dt3-ps span { font-size: 13px; color: var(--dt3-sub); }
.dt3-catblock { background: var(--dt3-card); border-radius: 14px; padding: 18px 22px 10px; margin-top: 24px; box-shadow: var(--dt3-shadow); }
.dt3-catblock-hd { padding-bottom: 10px; border-bottom: 2px solid var(--dt3-yellow); }
.dt3-catblock-hd a { font-size: 18px; font-weight: 800; }
.dt3-catblock-hd a:hover { color: var(--dt3-plate); }
.dt3-catblock-bd .dt3-news-row:last-child { border-bottom: 0; }

/* ---------- 搜索 ---------- */
.dt3-search-form { display: flex; gap: 10px; margin-bottom: 22px; }
.dt3-search-form input {
    flex: 1; height: 46px; border: 1px solid var(--dt3-line); border-radius: 10px;
    padding: 0 16px; font-size: 15px; background: #fff;
}
.dt3-search-form button {
    height: 46px; padding: 0 26px; border: 0; border-radius: 10px; cursor: pointer;
    background: var(--dt3-asphalt); color: var(--dt3-yellow); font-size: 15px; font-weight: 700;
}
.dt3-search-form button:hover { background: var(--dt3-asphalt-soft); }
.dt3-list-row {
    display: flex; gap: 18px; background: var(--dt3-card); border-radius: 14px;
    padding: 16px; margin-bottom: 14px; box-shadow: var(--dt3-shadow);
}
.dt3-list-thumb { flex: none; width: 200px; height: 130px; object-fit: cover; border-radius: 10px; }
.dt3-list-cnt { flex: 1; min-width: 0; }
.dt3-list-t { display: block; font-size: 17px; font-weight: 700; margin-bottom: 6px; line-height: 1.5; }
.dt3-list-t:hover { color: var(--dt3-plate); }
.dt3-list-d { font-size: 13px; color: var(--dt3-sub); line-height: 1.8; }
.dt3-list-m { margin-top: 8px; font-size: 13px; color: #5f6d80; display: flex; gap: 16px; }
.dt3-list-m i { margin-right: 4px; }

/* ---------- 单页正文团队照片横滑（JS 生成） ---------- */
.dt3-team-strip { display: flex; gap: 12px; overflow-x: auto; padding: 6px 2px 14px; scroll-snap-type: x mandatory; }
.dt3-team-strip img { flex: none; height: 180px; border-radius: 10px; scroll-snap-align: start; cursor: grab; }
.dt3-team-strip.is-drag { cursor: grabbing; user-select: none; }
.dt3-team-cap { position: relative; }
.dt3-team-tip { margin-left: 10px; font-size: 12px; color: var(--dt3-yellow-deep); }

/* ---------- 消息 / 404 ---------- */
.dt3-msg { background: var(--dt3-card); border-radius: 16px; padding: 60px 30px; text-align: center; margin: 40px 0; box-shadow: var(--dt3-shadow); }
.dt3-msg-ico { font-size: 56px; margin-bottom: 18px; }
.dt3-msg-ico.is-ok { color: #2f9e63; }
.dt3-msg-ico.is-err { color: var(--dt3-yellow-deep); }
.dt3-404-n { font-size: 72px; font-weight: 800; color: var(--dt3-asphalt); line-height: 1; letter-spacing: 4px; }
.dt3-404-n em { font-style: normal; color: var(--dt3-yellow); }
.dt3-msg h2, .dt3-msg .dt3-404-m { font-size: 18px; color: var(--dt3-sub); margin: 16px 0 26px; line-height: 1.8; }

/* ---------- 页脚：警示斜纹 + 沥青 ---------- */
.dt3-footer { background: var(--dt3-asphalt-deep); color: #b9c0c8; margin-top: 56px; position: relative; }
.dt3-footer::before {
    content: ""; display: block; height: 6px;
    background: repeating-linear-gradient(-45deg, var(--dt3-yellow) 0 14px, var(--dt3-asphalt-deep) 14px 28px);
}
.dt3-footer-in { display: flex; gap: 48px; padding: 44px 0 36px; flex-wrap: wrap; }
.dt3-footer h4 { font-size: 15px; color: #fff; margin-bottom: 14px; letter-spacing: 1px; }
.dt3-footer p { font-size: 14px; line-height: 2.1; }
.dt3-footer a:hover { color: var(--dt3-yellow); }
.dt3-f-qr { display: flex; gap: 16px; align-items: center; }
.dt3-f-qr img { width: 116px; height: 116px; background: #fff; padding: 6px; border-radius: 10px; }
.dt3-flinks { background: var(--dt3-asphalt); color: #9aa2ab; font-size: 13px; padding: 14px 0; border-top: 1px solid rgba(255,255,255,.06); }
.dt3-flinks a { color: #c6ccd4; margin-right: 14px; }
.dt3-flinks a:hover { color: var(--dt3-yellow); }
.dt3-copy { border-top: 1px solid rgba(255,255,255,.1); padding: 16px 0; font-size: 13px; color: #8b929b; }
.dt3-copy-in { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.dt3-copy a:hover { color: var(--dt3-yellow); }

/* ---------- 返回顶部 ---------- */
.dt3-top-btn {
    display: none; position: fixed; right: 22px; bottom: 26px; z-index: 80;
    width: 46px; height: 46px; border: 0; border-radius: 50%; cursor: pointer;
    background: var(--dt3-yellow); color: var(--dt3-asphalt); font-size: 16px;
    box-shadow: 0 10px 24px -8px rgba(247,181,0,.6);
}
.dt3-top-btn:hover { background: var(--dt3-yellow-deep); }

/* ---------- 入场动画 ---------- */
@media (prefers-reduced-motion: no-preference) {
    @keyframes dt3rise { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: none; } }
    .dt3-hero-in > * { opacity: 0; animation: dt3rise .7s var(--dt3-ease) forwards; }
    .dt3-hero-in .dt3-hero-tag { animation-delay: .05s; }
    .dt3-hero-in h1 { animation-delay: .28s; }
    .dt3-hero-in .dt3-lead { animation-delay: .4s; }
    .dt3-hero-in .dt3-hero-btns { animation-delay: .52s; }
    .dt3-hero-in .dt3-hero-stats { animation-delay: .66s; }
}
@media (prefers-reduced-motion: reduce) {
    .dt3-svc, .dt3-step, .dt3-btn, .dt3-lcard, .dt3 a.dt3-back, .dt3-bn-slide { transition: none; }
    .dt3-hero-in > * { opacity: 1; animation: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
    .dt3-grid .dt3-svc { width: calc((100% - 22px) / 2); }
    .dt3-grid .dt3-lcard { width: 100%; }
    .dt3-steps { flex-wrap: wrap; }
    .dt3-step { width: calc((100% - 18px) / 2); flex: none; }
    .dt3-step:not(:last-child)::after { display: none; }
    .dt3-hero h1 { font-size: 36px; }
    .dt3-band-grid { flex-wrap: wrap; }
    .dt3-band-item { flex: 1 1 46%; }
    .dt3-nav a { padding: 0 16px; }
}
@media (max-width: 860px) {
    .dt3-about-img { flex: 0 0 46%; }
    .dt3-about-img img { height: 240px; }
    .dt3-cols { gap: 24px; }
}
@media (max-width: 720px) {
    .dt3-topbar .dt3-wrap span:last-child { display: none; }
    .dt3-head-in { flex-wrap: nowrap; padding: 12px 0; gap: 8px; }
    .dt3-brand-mark { width: 42px; height: 42px; border-radius: 10px; }
    .dt3-brand-logo img { height: 38px; max-width: 130px; }
    .dt3-brand-mark::before, .dt3-brand-mark::after { width: 20px; }
    .dt3-brand-mark::before { left: 7px; }
    .dt3-brand-mark::after { right: 7px; }
    .dt3-brand { gap: 10px; flex: 1 1 auto; min-width: 0; }
    .dt3-brand b {
        font-size: 14px; white-space: normal; line-height: 1.4; letter-spacing: 0;
        display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
    }
    .dt3-brand span { display: none; }
    .dt3-head-tel { margin-left: auto; flex: 0 0 auto; }
    .dt3-head-tel .lb { display: none; }
    .dt3-head-tel .num { font-size: 15px; border-bottom-width: 2px; }
    .dt3-menu-btn { display: block; }

    /* 导航：下拉面板 */
    .dt3-nav { display: none; position: absolute; left: 0; right: 0; top: 100%; z-index: 60; box-shadow: 0 16px 30px -12px rgba(0,0,0,.4); }
    .dt3-nav.is-open { display: block; }
    .dt3-nav > .dt3-wrap > ul { display: block; }
    .dt3-nav a { line-height: 46px; padding: 0 20px; border-top: 1px solid rgba(255,255,255,.08); }
    .dt3-nav .dt3-top > a::after { display: none; }
    .dt3-nav .dt3-top.is-active > a { background: rgba(247,181,0,.12); }
    /* 子菜单改为面板内平铺展开 */
    .dt3-sub { display: block; position: static; min-width: 0; background: rgba(0,0,0,.18); border-top: 0; box-shadow: none; }
    .dt3-sub a { padding-left: 36px; font-size: 14px; color: #c6ccd4; }

    .dt3-hero-in { padding: 44px 0 56px; }
    .dt3-hero h1 { font-size: 27px; letter-spacing: 1px; }
    .dt3-hero .dt3-lead { font-size: 15px; margin-bottom: 24px; }
    .dt3-btn { height: 46px; padding: 0 22px; font-size: 15px; }
    .dt3-hero-stats { gap: 10px; margin-top: 30px; }
    .dt3-stat { flex: 1; min-width: 0; padding: 12px 14px; }
    .dt3-stat b { font-size: 22px; }
    .dt3-bn-cap { display: none; }

    .dt3-sec { padding: 36px 0 6px; }
    .dt3-sec-hd .dt3-t { font-size: 21px; }
    .dt3-sec-tint { padding: 26px 16px 20px; }
    .dt3-cols { flex-direction: column; }
    .dt3-grid { gap: 14px; }
    .dt3-grid .dt3-svc { width: 100%; }
    .dt3-svc img { height: 190px; }
    .dt3-svc-bd p { min-height: 0; }
    .dt3-lcard img.dt3-card-img { height: 190px; }

    /* 流程：纵向时间线 */
    .dt3-steps { flex-direction: column; gap: 0; padding-left: 26px; position: relative; }
    .dt3-steps::before {
        content: ""; position: absolute; left: 10px; top: 30px; bottom: 30px; width: 3px; border-radius: 2px;
        background: repeating-linear-gradient(180deg, var(--dt3-yellow) 0 10px, transparent 10px 18px);
    }
    .dt3-step { width: 100%; margin-bottom: 12px; text-align: left; padding: 16px 16px 14px; }
    .dt3-step-n { position: absolute; left: -26px; top: 16px; margin: 0; width: 40px; height: 40px; font-size: 15px; background: var(--dt3-concrete); }
    .dt3-step:not(:last-child)::after { display: none; }

    .dt3-band { padding: 34px 0; margin-top: 36px; }
    .dt3-band-grid { flex-direction: column; gap: 12px; }
    .dt3-band-item { flex: none; }
    .dt3-about { flex-direction: column; padding: 16px; gap: 18px; }
    .dt3-about-img { flex: none; }
    .dt3-about-img img { height: 200px; }
    .dt3-page-stats { flex-direction: column; }

    .dt3-ibn { padding: 28px 0 26px; }
    .dt3-ibn .dt3-ibn-t, .dt3-ibn h1 { font-size: 22px; letter-spacing: 1px; }
    .dt3-article { padding: 22px 18px; margin-top: 20px; border-radius: 12px; }
    .dt3-article .dt3-show-t { font-size: 20px; }
    .dt3-show-meta { flex-wrap: wrap; gap: 10px 16px; }
    .dt3-prevnext { flex-direction: column; gap: 8px; }
    .dt3-news-card, .dt3-rel .dt3-news-card { padding: 4px 16px; }
    .dt3-news-date { display: none; }
    .dt3-news-hits { display: none; }
    .dt3-list-thumb { width: 108px; height: 76px; }
    .dt3-footer-in { gap: 24px; padding: 32px 0 26px; }
    .dt3-footer-in > div { min-width: 100%; }
    .dt3-f-qr img { width: 92px; height: 92px; }
    .dt3-copy-in { flex-direction: column; gap: 2px; }
}
@media (max-width: 380px) {
    .dt3-hero-stats { flex-direction: column; }
    .dt3-stat b { font-size: 24px; }
}