/* ============================================================
   上海赵涌在线智能技术有限公司 · 官方网站
   静态站点样式（无构建、无外部依赖）
   ============================================================ */
:root{
  --brand:#1677C8;
  --brand-d:#0E5C9E;
  --brand-l:#EAF3FB;
  --ink:#1F2329;
  --ink-2:#5A6472;
  --ink-3:#8A93A0;
  --line:#E3E7ED;
  --bg-soft:#F7F9FC;
  --maxw:1120px;
  --radius:10px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",system-ui,-apple-system,sans-serif;
  color:var(--ink);background:#fff;line-height:1.8;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.en{font-family:"Helvetica Neue",Helvetica,Arial,system-ui,sans-serif}

/* ---------- 顶栏 ---------- */
header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;height:68px;gap:14px}
.brand{display:flex;align-items:center;gap:11px;font-size:19px;font-weight:700;color:var(--brand)}
.brand img{height:32px;width:auto}
.nav-links{margin-left:auto;display:flex;gap:30px;font-size:15px;color:var(--ink-2)}
.nav-links a:hover{color:var(--brand)}
.nav-links a.on{color:var(--brand);font-weight:600}
.nav-en{font-size:13px;color:var(--ink-3);border-left:1px solid var(--line);padding-left:22px}
@media(max-width:800px){.nav-links{display:none}.nav-en{margin-left:auto;border:0;padding:0}}

/* ---------- 首屏 ---------- */
.hero{background:linear-gradient(165deg,#0E5C9E 0%,#1677C8 58%,#2A93DC 100%);color:#fff;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(58% 60% at 82% 26%,rgba(255,255,255,.16),transparent 68%);pointer-events:none}
.hero .wrap{position:relative;z-index:2;padding:74px 24px 78px}
.hero .tag{display:inline-block;font-size:13px;letter-spacing:2.5px;color:#CFE6FA;border:1px solid rgba(255,255,255,.42);padding:4px 14px;border-radius:3px;margin-bottom:22px}
.hero h1{font-size:clamp(28px,3.6vw,42px);line-height:1.3;font-weight:800;letter-spacing:1px}
.hero h1 small{display:block;font-size:clamp(14px,1.5vw,17px);font-weight:400;letter-spacing:.4px;color:#CFE6FA;margin-top:14px}
.hero p.lead{margin-top:24px;color:#E4F1FB;font-size:16px;max-width:44em;line-height:1.95}
.hero .cta{margin-top:32px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;background:#fff;color:var(--brand-d);font-weight:700;font-size:15px;padding:12px 26px;border-radius:6px;transition:.15s}
.btn:hover{transform:translateY(-1px);box-shadow:0 6px 18px rgba(0,0,0,.16)}
.btn.line{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.55)}
.btn.line:hover{background:rgba(255,255,255,.12);box-shadow:none}

/* ---------- 通用区块 ---------- */
section.block{padding:66px 0}
section.block.soft{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{margin-bottom:34px}
.kicker{font-size:13px;letter-spacing:2.5px;color:var(--brand);font-weight:700}
h2.title{font-size:clamp(22px,2.5vw,29px);font-weight:800;margin-top:8px;letter-spacing:.5px}
h2.title small{display:block;font-size:14px;font-weight:400;color:var(--ink-3);letter-spacing:.3px;margin-top:8px}
p.desc{color:var(--ink-2);font-size:15.5px;line-height:2;max-width:60em}
p.desc + p.desc{margin-top:14px}

/* ---------- 四大理念 ---------- */
.values{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.value{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;text-align:center}
.value img{width:46px;height:46px;margin:0 auto 14px}
.value b{display:block;font-size:17px;letter-spacing:1px}
.value span{display:block;font-size:13.5px;color:var(--ink-3);margin-top:6px}
@media(max-width:820px){.values{grid-template-columns:repeat(2,1fr)}}

/* ---------- 信息表 ---------- */
table.info{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;font-size:15px}
table.info th,table.info td{padding:14px 18px;border-bottom:1px solid var(--line);vertical-align:top;text-align:left}
table.info tr:last-child th,table.info tr:last-child td{border-bottom:0}
table.info th{width:210px;background:var(--bg-soft);color:var(--ink-2);font-weight:500;white-space:nowrap}
table.info td{color:var(--ink)}
table.info td strong{font-weight:700}
@media(max-width:620px){
  table.info th{width:118px;white-space:normal;font-size:13.5px}
  table.info th,table.info td{padding:11px 12px;font-size:14px}
}

/* ---------- 资质卡 ---------- */
.certs{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:20px}
.cert{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.cert h3{font-size:16.5px;font-weight:700;margin-bottom:10px}
.cert .num{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:15px;color:var(--brand-d);background:var(--brand-l);border-radius:5px;padding:3px 9px;display:inline-block}
.cert p{font-size:14px;color:var(--ink-2);margin-top:12px;line-height:1.85}
@media(max-width:820px){.certs{grid-template-columns:1fr}}

/* ---------- 联系 ---------- */
.contact-list{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.contact-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.contact-item .lb{font-size:13px;color:var(--ink-3);letter-spacing:1px}
.contact-item .vl{font-size:16px;font-weight:600;margin-top:8px;line-height:1.7}
@media(max-width:820px){.contact-list{grid-template-columns:1fr}}

/* ---------- 页脚 ---------- */
footer{background:#22272E;color:#B9C1CC;padding:46px 0 30px;font-size:13.5px;line-height:2}
footer .f-top{display:flex;flex-wrap:wrap;gap:26px;align-items:flex-start;justify-content:space-between;padding-bottom:24px;border-bottom:1px solid rgba(255,255,255,.12)}
footer .f-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:16px;font-weight:700}
footer .f-brand img{height:24px;filter:brightness(0) invert(1);opacity:.95;margin-right:0}
footer .f-links{display:flex;gap:22px;flex-wrap:wrap}
footer .f-links a:hover{color:#fff}
footer .f-body{padding-top:20px}
footer .f-legal{color:#E4E9EF}
footer .f-legal b{color:#fff;font-weight:600}
footer .beian{display:flex;align-items:center;gap:8px;margin-top:14px;flex-wrap:wrap}
footer .beian img{width:18px;height:18px;display:inline-block}
footer .beian a{color:#B9C1CC}
footer .beian a:hover{color:#fff}
footer .copy{margin-top:16px;color:#8C95A1;font-size:12.5px}

/* ---------- 杂项 ---------- */
.tip{background:var(--brand-l);border:1px solid #CBE1F5;border-left:4px solid var(--brand);border-radius:6px;padding:16px 20px;font-size:14.5px;color:#20415F;line-height:1.9}
.breadcrumb{font-size:13.5px;color:var(--ink-3);padding-top:22px}
.breadcrumb a:hover{color:var(--brand)}
.hr-rule{height:1px;background:var(--line);border:0;margin:0}