/* ===== 引航前台自包含样式（红色科技风） ===== */
:root{
  --main:#e10000; --main-d:#b80000; --ink:#20242e; --gray:#6b7280;
  --bg:#ffffff; --bg-alt:#f6f7fb; --line:#e9ebf0; --radius:12px;
  --shadow:0 8px 28px rgba(20,24,40,.08);
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased;}
a{color:inherit;text-decoration:none;transition:color .2s;}
img{max-width:100%;display:block;}
ul{list-style:none;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}

/* ---------- 头部 ---------- */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:74px;}
.logo{display:flex;align-items:center;gap:10px;}
.logo img{height:42px;width:auto;}
.logo .logo-text{font-size:19px;font-weight:800;letter-spacing:.5px;color:var(--ink);white-space:nowrap;}
.logo .logo-text b{color:var(--main);}
.main-nav{display:flex;align-items:center;gap:4px;}
.main-nav a{padding:10px 14px;font-size:15px;color:#3a3f4b;border-radius:8px;white-space:nowrap;}
.main-nav a:hover{color:var(--main);background:#fff5f5;}
.main-nav a.active{color:var(--main);font-weight:700;}
.header-tel{display:flex;align-items:center;gap:7px;color:var(--main);font-weight:800;font-size:17px;white-space:nowrap;}
.header-tel svg{width:19px;height:19px;}
.nav-toggle{display:none;background:none;border:none;font-size:26px;color:var(--ink);cursor:pointer;}

/* ---------- Hero 轮播 ---------- */
.hero{position:relative;height:520px;overflow:hidden;background:#111;}
.hero-slide{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;animation:heroFade 15s infinite;}
.hero-slide:nth-child(1){animation-delay:0s;}
.hero-slide:nth-child(2){animation-delay:5s;}
.hero-slide:nth-child(3){animation-delay:10s;}
.hero-slide:nth-child(4){animation-delay:15s;}
@keyframes heroFade{0%{opacity:0}4%{opacity:1}30%{opacity:1}36%{opacity:0}100%{opacity:0}}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(100deg,rgba(12,14,24,.85) 0%,rgba(12,14,24,.55) 42%,rgba(12,14,24,.15) 100%);}
.hero-content{position:relative;z-index:2;height:100%;display:flex;flex-direction:column;justify-content:center;max-width:1200px;margin:0 auto;padding:0 20px;color:#fff;}
.hero-content .eyebrow{display:inline-block;font-size:14px;letter-spacing:3px;color:#ff9a9a;margin-bottom:14px;font-weight:600;}
.hero-content h1{font-size:52px;line-height:1.2;font-weight:800;margin-bottom:18px;text-shadow:0 4px 22px rgba(0,0,0,.35);}
.hero-content h1 em{font-style:normal;color:#ff5a5a;}
.hero-content p{font-size:17px;color:#dfe3ea;max-width:560px;margin-bottom:30px;}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap;}
.btn-main,.btn-ghost{display:inline-flex;align-items:center;gap:8px;padding:13px 30px;border-radius:999px;font-size:15px;font-weight:700;transition:.25s;}
.btn-main{background:var(--main);color:#fff;box-shadow:0 8px 22px rgba(225,0,0,.4);}
.btn-main:hover{background:var(--main-d);transform:translateY(-2px);}
.btn-ghost{border:1.5px solid rgba(255,255,255,.6);color:#fff;}
.btn-ghost:hover{background:rgba(255,255,255,.14);}

/* ---------- 通用区块 ---------- */
.section{padding:76px 0;}
.section.alt{background:var(--bg-alt);}
.sec-title{text-align:center;font-size:32px;font-weight:800;margin-bottom:10px;}
.sec-title span{color:var(--main);}
.sec-sub{text-align:center;color:var(--gray);font-size:15px;margin-bottom:46px;}

/* 服务卡片 */
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.svc-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;transition:.28s;position:relative;overflow:hidden;}
.svc-card:before{content:"";position:absolute;left:0;top:0;width:4px;height:0;background:var(--main);transition:.28s;}
.svc-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:#ffd9d9;}
.svc-card:hover:before{height:100%;}
.svc-icon{width:52px;height:52px;border-radius:14px;background:#fff1f1;color:var(--main);display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:800;margin-bottom:18px;}
.svc-card h3{font-size:20px;margin-bottom:10px;}
.svc-card p{color:var(--gray);font-size:14px;line-height:1.75;margin-bottom:16px;min-height:50px;}
.svc-card .more{color:var(--main);font-size:14px;font-weight:700;}

/* 新闻卡片 */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:0 4px 18px rgba(20,24,40,.05);transition:.28s;display:flex;flex-direction:column;}
.news-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);}
.news-card .thumb{height:190px;overflow:hidden;background:#eee;}
.news-card .thumb img{width:100%;height:100%;object-fit:cover;transition:.5s;}
.news-card:hover .thumb img{transform:scale(1.06);}
.news-card .body{padding:18px 20px 22px;flex:1;display:flex;flex-direction:column;}
.news-card h3{font-size:17px;line-height:1.55;margin-bottom:10px;}
.news-card:hover h3{color:var(--main);}
.news-card p{color:var(--gray);font-size:13px;line-height:1.7;flex:1;margin-bottom:12px;}
.news-card .date{color:#a3a8b3;font-size:12px;}

/* 内页 banner */
.sub-banner{height:280px;display:flex;align-items:center;justify-content:center;text-align:center;color:#fff;position:relative;
  background:radial-gradient(circle at 18% 28%,rgba(255,255,255,.14),transparent 42%),linear-gradient(135deg,#c81a1a 0%,#8a0f0f 100%);}
.sub-banner h1{position:relative;z-index:2;font-size:38px;font-weight:800;letter-spacing:1px;}
.sub-banner p{position:relative;z-index:2;color:#ffd9d9;font-size:15px;margin-top:8px;}

/* 内页布局 */
.page-wrap{padding:44px 0 70px;}
.breadcrumb{font-size:13px;color:var(--gray);margin-bottom:26px;padding-bottom:14px;border-bottom:1px solid var(--line);}
.breadcrumb a:hover{color:var(--main);}
.layout{display:grid;grid-template-columns:1fr 300px;gap:34px;align-items:start;}
.layout.full{grid-template-columns:1fr;}

/* 列表 */
.list-item{display:flex;gap:22px;padding:24px 0;border-bottom:1px solid var(--line);}
.list-item:first-child{padding-top:0;}
.list-item .thumb{width:230px;height:150px;flex:0 0 auto;border-radius:10px;overflow:hidden;background:#eee;}
.list-item .thumb img{width:100%;height:100%;object-fit:cover;}
.list-item h2{font-size:20px;margin-bottom:10px;}
.list-item h2 a:hover{color:var(--main);}
.list-item .meta{color:#a3a8b3;font-size:13px;margin-bottom:8px;}
.list-item .sum{color:var(--gray);font-size:14px;line-height:1.75;margin-bottom:12px;}
.list-item .read{color:var(--main);font-size:14px;font-weight:700;}
.empty{color:#a3a8b3;text-align:center;padding:70px 0;font-size:16px;}

/* 侧栏 */
.sidebar .box{background:var(--bg-alt);border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin-bottom:22px;}
.sidebar .box h3{font-size:17px;margin-bottom:14px;padding-left:11px;border-left:3px solid var(--main);}
.sidebar .box li{line-height:2.05;font-size:14px;border-bottom:1px dashed var(--line);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.sidebar .box li:last-child{border-bottom:none;}
.sidebar .box li a{color:#4b515e;}
.sidebar .box li a:hover{color:var(--main);}
.sidebar .box p{color:var(--gray);font-size:14px;line-height:1.9;}

/* 文章/单页 */
.article-box h1{font-size:30px;line-height:1.4;margin-bottom:14px;}
.article-meta{color:#a3a8b3;font-size:13px;padding-bottom:16px;margin-bottom:24px;border-bottom:1px solid var(--line);}
.article-content{font-size:15.5px;line-height:2;color:#3d4350;}
.article-content p{margin-bottom:18px;}
.article-content img{max-width:100%;height:auto;border-radius:10px;margin:16px 0;}
.article-content h2,.article-content h3{margin:24px 0 14px;}
.article-content ul,.article-content ol{padding-left:22px;margin-bottom:16px;list-style:disc;}

/* 留言表单 */
.msg-form{margin-top:30px;background:var(--bg-alt);border:1px solid var(--line);border-radius:var(--radius);padding:26px;}
.msg-form h3{font-size:19px;margin-bottom:16px;}
.msg-form input,.msg-form textarea{width:100%;padding:11px 14px;border:1px solid #dfe2e9;border-radius:8px;font-size:14px;font-family:inherit;margin-bottom:12px;background:#fff;}
.msg-form input:focus,.msg-form textarea:focus{outline:none;border-color:var(--main);}
.msg-form textarea{height:120px;resize:vertical;}
.msg-form button{background:var(--main);color:#fff;border:none;border-radius:8px;padding:12px 34px;font-size:15px;font-weight:700;cursor:pointer;}
.msg-form button:hover{background:var(--main-d);}
.alert-ok{background:#e8f8ee;color:#17924a;border:1px solid #c4ecd4;padding:12px 16px;border-radius:8px;margin-bottom:18px;font-size:14px;}

/* ---------- 页脚 ---------- */
.site-footer{background:#161a24;color:#9aa1af;padding:56px 0 0;margin-top:20px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;}
.site-footer h4{color:#fff;font-size:16px;margin-bottom:18px;position:relative;padding-left:11px;}
.site-footer h4:before{content:"";position:absolute;left:0;top:4px;width:3px;height:16px;background:var(--main);border-radius:2px;}
.site-footer p,.site-footer li{font-size:13.5px;line-height:2.1;}
.site-footer a:hover{color:#fff;}
.footer-qr{width:112px;height:112px;background:#fff;padding:6px;border-radius:8px;object-fit:contain;}
.footer-bottom{border-top:1px solid #262b38;margin-top:40px;padding:18px 0;text-align:center;font-size:12.5px;color:#7b8290;}
.footer-bottom a:hover{color:#fff;}

/* ---------- 响应式 ---------- */
@media(max-width:1024px){
  .svc-grid,.news-grid{grid-template-columns:repeat(2,1fr);}
  .layout{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .hero-content h1{font-size:40px;}
}
@media(max-width:760px){
  .nav-toggle{display:block;}
  .main-nav{position:absolute;top:74px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:10px 16px;border-bottom:1px solid var(--line);display:none;box-shadow:0 10px 24px rgba(0,0,0,.08);}
  .main-nav.open{display:flex;}
  .main-nav a{padding:12px;}
  .header-tel{display:none;}
  .hero{height:420px;}
  .hero-content h1{font-size:30px;}
  .hero-content p{font-size:15px;}
  .svc-grid,.news-grid{grid-template-columns:1fr;}
  .list-item{flex-direction:column;}
  .list-item .thumb{width:100%;height:190px;}
  .footer-grid{grid-template-columns:1fr;}
  .sub-banner{height:190px;}
  .sub-banner h1{font-size:26px;}
  .section{padding:52px 0;}
  .sec-title{font-size:24px;}
}

/* ---------- 面包屑 ---------- */
.breadcrumb{font-size:13px;color:#8a90a0;padding:16px 0 4px;}
.breadcrumb a{color:#6b7280;}
.breadcrumb a:hover{color:var(--main);}
.breadcrumb span{color:var(--main);font-weight:600;}

/* ---------- 相关阅读（文末内链，强化整站内链） ---------- */
.related-posts{margin-top:34px;border-top:1px solid var(--line);padding-top:20px;}
.related-posts h3{font-size:17px;margin-bottom:12px;color:#1f2733;}
.rp-list{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:10px 24px;}
.rp-list li{padding-left:16px;position:relative;line-height:1.9;font-size:14.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.rp-list li:before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;background:var(--main);}
.rp-list a{color:#3a4252;}
.rp-list a:hover{color:var(--main);}
@media(max-width:760px){.rp-list{grid-template-columns:1fr;}}

/* GEO FAQ 区块（利于百度精选摘要 + AI 引用） */
.geo-faq{background:#fff;padding:46px 0;border-top:1px solid #f0f0f0;}
.geo-faq .sec-title{margin-bottom:8px;}
.faq-list{display:grid;grid-template-columns:1fr 1fr;gap:14px 26px;margin-top:22px;}
.faq-item{border:1px solid #eee;border-left:3px solid var(--main);background:#fcfcfd;border-radius:8px;padding:14px 16px;}
.faq-item h3{font-size:15.5px;color:#182030;margin-bottom:6px;}
.faq-item p{font-size:14px;line-height:1.8;color:#5a6275;margin:0;}
@media(max-width:760px){.faq-list{grid-template-columns:1fr;}}