:root{
  --blue:#0a5bd6;
  --blue-d:#073e96;
  --teal:#00a6a8;
  --ink:#1b2430;
  --gray:#5d6b7a;
  --bg:#f5f8fc;
  --white:#fff;
  --line:#e4ebf3;
  --radius:14px;
  --shadow:0 10px 30px rgba(10,91,214,.10);
  --maxw:1180px;
  --cn-font:"Microsoft YaHei","PingFang SC","Hiragino Sans GB","Source Han Sans CN",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--cn-font);color:var(--ink);background:var(--white);line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 18px}

/* 顶部条 */
.topbar{background:var(--blue-d);color:#dfeaff;font-size:13px}
.topbar-inner{display:flex;justify-content:space-between;align-items:center;height:38px;flex-wrap:wrap;gap:6px}
.topbar a{color:#dfeaff}
.topbar a:hover{color:#fff}
.topbar .sep{margin:0 10px;opacity:.5}

/* 导航 */
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);box-shadow:0 2px 14px rgba(0,0,0,.06)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;flex-direction:column;line-height:1.1}
.logo-cn{font-size:20px;font-weight:800;color:var(--blue)}
.logo-en{font-size:11px;color:var(--gray);letter-spacing:.5px}
.nav{display:flex;align-items:center;gap:26px}
.nav a{font-size:15px;color:var(--ink);font-weight:600;position:relative;padding:6px 0}
.nav a:hover{color:var(--blue)}
.nav a.nav-cta{background:var(--blue);color:#fff;padding:9px 18px;border-radius:30px;font-weight:700}
.nav a.nav-cta:hover{background:var(--blue-d)}
.menu-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.menu-toggle span{width:24px;height:2px;background:var(--ink);border-radius:2px;transition:.3s}

/* 首屏 */
.hero{position:relative;color:#fff;overflow:hidden}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;transform:scale(1.05)}
.hero-mask{position:absolute;inset:0;background:linear-gradient(120deg,rgba(7,62,150,.92),rgba(0,166,168,.62))}
.hero-inner{position:relative;padding:90px 18px 100px;max-width:780px}
.hero-tag{display:inline-block;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.4);padding:6px 16px;border-radius:30px;font-size:13px;margin-bottom:18px}
.hero h1{font-size:42px;line-height:1.25;font-weight:800;letter-spacing:1px}
.hero-sub{font-size:17px;margin:20px 0 28px;opacity:.95}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:14px 30px;border-radius:34px;font-weight:700;font-size:15px;transition:.25s;cursor:pointer;border:2px solid transparent}
.btn-primary{background:#ff7a1a;color:#fff;box-shadow:0 8px 22px rgba(255,122,26,.4)}
.btn-primary:hover{background:#ff6612;transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.12);border-color:#fff;color:#fff}
.btn-ghost:hover{background:#fff;color:var(--blue)}
.btn-block{width:100%;text-align:center}
.hero-points{list-style:none;display:flex;gap:30px;flex-wrap:wrap;margin-top:36px}
.hero-points li{font-size:15px;opacity:.95}
.hero-points strong{display:block;font-size:20px;color:#ffe600}

/* 信任 */
.trust{background:var(--blue);color:#fff}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;padding:30px 18px}
.trust-item{text-align:center}
.trust-num{font-size:38px;font-weight:800;line-height:1}
.trust-label{font-size:14px;opacity:.9;margin-top:6px}

/* 通用区块 */
.section{padding:70px 0}
.section-alt{background:var(--bg)}
.sec-head{text-align:center;max-width:820px;margin:0 auto 44px}
.sec-kicker{display:inline-block;color:var(--teal);font-weight:700;font-size:14px;letter-spacing:2px;margin-bottom:10px}
.sec-head h2{font-size:30px;font-weight:800;color:var(--ink)}
.sec-head p{margin-top:14px;color:var(--gray);font-size:16px}

/* 功能卡 */
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.feat-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 22px;text-align:center;box-shadow:var(--shadow);transition:.25s}
.feat-card:hover{transform:translateY(-6px)}
.feat-ico{width:58px;height:58px;margin:0 auto 14px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--teal));color:#fff;display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:800}
.feat-card h3{font-size:18px;margin-bottom:8px}
.feat-card p{font-size:14px;color:var(--gray)}

/* 原理 */
.principle-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.principle-step{background:#fff;border-radius:var(--radius);padding:24px 20px;border-top:4px solid var(--teal);box-shadow:var(--shadow)}
.ps-no{font-size:26px;font-weight:800;color:var(--blue);opacity:.25}
.principle-step h4{font-size:17px;margin:6px 0 8px}
.principle-step p{font-size:14px;color:var(--gray)}

/* 图说 */
.about-figure{margin-top:40px;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.about-figure-cap{padding:12px 16px;background:#fff;font-size:14px;color:var(--gray);text-align:center}

/* 产品系列 */
.series-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.series-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.25s;display:flex;flex-direction:column}
.series-card:hover{transform:translateY(-6px)}
.series-card img{height:200px;object-fit:cover}
.series-body{padding:20px 20px 24px}
.series-body h3{font-size:19px;color:var(--blue);margin-bottom:8px}
.series-body p{font-size:14px;color:var(--gray);margin-bottom:12px}
.series-body ul{list-style:none;display:flex;flex-wrap:wrap;gap:8px}
.series-body li{background:var(--bg);color:var(--ink);font-size:13px;padding:4px 12px;border-radius:20px}
.series-card--wide{grid-column:span 3;flex-direction:row}
.series-card--wide img{width:46%;height:auto}
.series-card--wide .series-body{flex:1;display:flex;flex-direction:column;justify-content:center}

/* 核心部件 */
.comp-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.comp-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.25s}
.comp-card:hover{transform:translateY(-5px)}
.comp-card img{height:160px;object-fit:cover}
.comp-card h4{font-size:16px;padding:14px 14px 4px;color:var(--ink)}
.comp-card p{font-size:13px;color:var(--gray);padding:0 14px 16px}
.tech-points{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:34px}
.tp{background:linear-gradient(135deg,var(--blue),var(--blue-d));color:#fff;border-radius:var(--radius);padding:22px 20px}
.tp h4{font-size:17px;margin-bottom:8px}
.tp p{font-size:14px;opacity:.92}

/* 场景 */
.scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.scene-card{position:relative;height:200px;border-radius:var(--radius);background-size:cover;background-position:center;display:flex;align-items:flex-end;overflow:hidden}
.scene-card::after{content:"";position:absolute;inset:0;background:linear-gradient(transparent,rgba(7,62,150,.8))}
.scene-card span{position:relative;z-index:2;color:#fff;font-weight:700;font-size:16px;padding:16px}

/* 案例 */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.case-item{margin:0;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);background:#fff}
.case-item img{height:220px;object-fit:cover}
.case-item figcaption{padding:14px 16px;font-size:14px;color:var(--ink);font-weight:600;text-align:center}

/* 关于 */
.company-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.company-text h2{font-size:28px;margin:8px 0 16px}
.company-text p{color:var(--gray);margin-bottom:14px;font-size:16px}
.company-list{list-style:none;margin-top:14px}
.company-list li{position:relative;padding-left:26px;margin-bottom:10px;font-size:15px}
.company-list li::before{content:"✓";position:absolute;left:0;top:0;color:var(--teal);font-weight:800}
.company-media{position:relative}
.company-media img{border-radius:var(--radius);box-shadow:var(--shadow)}
.company-medal{position:absolute;right:-10px;bottom:-18px;width:130px;background:#fff;border-radius:50%;box-shadow:var(--shadow);padding:6px}

/* 联系 */
.section-contact{background:linear-gradient(135deg,var(--blue-d),var(--teal));color:#fff}
.section-contact .sec-kicker{color:#ffe600}
.section-contact h2{color:#fff}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.contact-info p{opacity:.92;font-size:16px;margin:12px 0 22px}
.contact-list{list-style:none}
.contact-list li{display:flex;gap:14px;padding:10px 0;border-bottom:1px solid rgba(255,255,255,.18);font-size:15px}
.contact-list li span{width:56px;color:#ffe600;font-weight:700;flex:none}
.contact-list a{font-weight:700}
.contact-form{background:#fff;border-radius:var(--radius);padding:28px;color:var(--ink);box-shadow:var(--shadow)}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:6px}
.field input,.field select,.field textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit;outline:none;transition:.2s}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(10,91,214,.12)}
.form-note{margin-top:12px;font-size:14px;text-align:center;color:var(--teal);font-weight:600;min-height:20px}

/* 微信联系块 */
.contact-wechat{background:#fff;border-radius:var(--radius);padding:24px;text-align:center;color:var(--ink);box-shadow:var(--shadow);display:flex;flex-direction:column;align-items:center;gap:14px}
.wechat-qr{width:200px;height:200px;object-fit:cover;border:1px solid var(--line);border-radius:12px}
.wechat-id{font-size:15px;color:var(--gray)}
.wechat-id strong{color:var(--blue);font-size:17px}

/* 页脚小二维码 */
.footer-qr{width:84px;height:84px;border-radius:10px;border:1px solid rgba(255,255,255,.25);margin-top:14px;display:block}
.footer-qr-cap{font-size:13px;color:#92a4c0;margin-top:6px}

@media(max-width:680px){
  .wechat-qr{width:240px;height:240px}
  .contact-wechat .wechat-id{text-align:center}
  .footer-qr{margin-left:auto;margin-right:auto}
  .footer-qr-cap{text-align:center}
}

/* 底部 */
.footer{background:#11203a;color:#c7d3e6}
.footer-inner{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:30px;padding:48px 18px 30px}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:14px}
.footer-col a,.footer-col p{color:#c7d3e6;font-size:14px;display:block;margin-bottom:8px}
.footer-col a:hover{color:#fff}
.logo--footer .logo-cn{color:#fff}
.logo--footer .logo-en{color:#9fb3d1}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:16px 0;font-size:13px;color:#92a4c0}
.footer-bottom .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

/* 悬浮电话 */
.float-call{position:fixed;right:18px;bottom:20px;z-index:60;background:var(--blue);color:#fff;display:flex;align-items:center;gap:8px;padding:12px 18px;border-radius:40px;box-shadow:0 10px 24px rgba(10,91,214,.45);font-weight:700}
.float-call:hover{background:var(--blue-d)}
.float-ico{font-size:18px}

/* 服务区域城市入口 */
.city-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.city-chip{display:block;background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 14px;text-align:center;font-weight:700;color:var(--blue);box-shadow:var(--shadow);transition:.22s}
.city-chip:hover{background:var(--blue);color:#fff;transform:translateY(-3px)}

/* 首页子页入口链接 */
.more-links{text-align:center;margin-top:30px;font-size:15px;color:var(--gray)}
.more-links a{color:var(--blue);font-weight:600;margin:0 2px}
.more-links a:hover{color:var(--blue-d);text-decoration:underline}

/* 响应式 */
@media(max-width:980px){
  .feat-grid,.principle-grid,.comp-grid,.tech-points,.scene-grid{grid-template-columns:repeat(2,1fr)}
  .series-grid{grid-template-columns:repeat(2,1fr)}
  .series-card--wide{grid-column:span 2}
  .case-grid{grid-template-columns:repeat(2,1fr)}
  .trust-grid{grid-template-columns:repeat(2,1fr);gap:24px}
  .company-grid,.contact-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  .topbar-left{display:none}
  .topbar-inner{justify-content:center}
  .nav{position:fixed;top:104px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;gap:0;padding:10px 18px 20px;box-shadow:0 12px 24px rgba(0,0,0,.12);transform:translateY(-130%);transition:.3s;z-index:40}
  .nav.open{transform:translateY(0)}
  .nav a{padding:14px 0;border-bottom:1px solid var(--line)}
  .nav a.nav-cta{text-align:center;margin-top:10px}
  .menu-toggle{display:flex}
  .header-inner{height:58px}
  .hero-inner{padding:60px 18px 70px}
  .hero h1{font-size:28px}
  .hero-sub{font-size:15px}
  .hero-points{gap:18px}
  .hero-points li{font-size:13px}
  .sec-head h2{font-size:24px}
  .feat-grid,.principle-grid,.comp-grid,.tech-points,.scene-grid,.series-grid,.case-grid{grid-template-columns:1fr}
  .series-card--wide,.series-card--wide img{grid-column:auto;flex-direction:column;width:100%}
  .trust-grid{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr}
  .float-txt{display:none}
  .float-call{padding:14px}
}

SEO_TRUST_CSS
/* trust section now uses template component classes (.feat-card/.principle-step) */
.trust-block{background:var(--bg)}
.trust-steps{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-top:32px}
.trust-steps .principle-step{text-align:center}
.trust-steps .ps-no{display:block;margin-bottom:6px}
.principle-step h4{font-size:16px;color:var(--ink);margin-bottom:6px}
.principle-step p{font-size:13px;color:var(--gray);line-height:1.7}
a,button{-webkit-tap-highlight-color:transparent}
img{background:#eef3f9}
.btn,.rel-card,.faq-q{min-height:44px}
@media(max-width:980px){.trust-steps{grid-template-columns:repeat(3,1fr)}}
@media(max-width:560px){.trust-steps{grid-template-columns:1fr 1fr}.feat-grid{grid-template-columns:1fr 1fr}}

LOCAL_CSS
/* localized content */
.local-guide{background:#fff}
.local-guide .sec-head p{text-align:left;max-width:none;margin:14px auto 0;color:#5d6b7a;font-size:15px;line-height:1.9}
.local-venues,.local-dist{margin:18px 0;font-size:14px;color:#5d6b7a;line-height:1.9}
.local-dist-t{color:#1b2430;font-weight:700;margin-right:6px}
.tag{display:inline-block;background:#eef3f9;border:1px solid #e4ebf3;color:#0a5bd6;border-radius:20px;padding:5px 14px;margin:5px 6px 0 0;font-size:13px}
.local-tips{list-style:none;margin:14px 0 0;padding:0}
.local-tips li{position:relative;padding-left:26px;margin-bottom:10px;font-size:15px;color:#1b2430}
.local-tips li::before{content:"\2713";position:absolute;left:0;top:0;color:#00a6a8;font-weight:800}

REL_CSS
/* related internal links */
.rel-links{background:#f6f9fd}
.rel-grid{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.rel-card{display:inline-block;background:#fff;border:1px solid #e4ebf3;color:#0a5bd6;border-radius:8px;padding:10px 16px;font-size:14px;text-decoration:none;transition:.2s}
.rel-card:hover{background:#0a5bd6;color:#fff;border-color:#0a5bd6}

FAQ_CSS
/* FAQ accordion */
.faq-local{background:#fff}
.faq-list{margin-top:10px}
.faq-item{border:1px solid #e4ebf3;border-radius:10px;margin-bottom:12px;overflow:hidden;background:#fafcff}
.faq-item summary{cursor:pointer;padding:16px 18px;font-weight:700;color:#1b2430;font-size:16px;list-style:none;position:relative;padding-right:42px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";position:absolute;right:18px;top:14px;font-size:22px;color:#0a5bd6;font-weight:800}
.faq-item[open] summary::after{content:"\2212"}
.faq-a{padding:0 18px 18px;color:#5d6b7a;font-size:15px;line-height:1.9}