:root{
  --brand:#1f6feb; --brand-d:#1a5fd0; --ink:#131c2b; --ink2:#26313f;
  --muted:#66748a; --line:#e4e9f2; --bg:#f6f8fc; --card:#fff;
  --nav-h:64px;
}
*{box-sizing:border-box}
/* 滚动条：细、圆角、半透明，与系统页统一（原生滚动条太粗，和整页设计不搭）
 * Chrome 121+ 一旦设了 scrollbar-width/scrollbar-color 就会忽略 ::-webkit-scrollbar，
 * 所以标准属性只喂给 Firefox，Chromium 保留 WebKit 伪元素的完全控制权。 */
::-webkit-scrollbar{width:10px;height:9px}
::-webkit-scrollbar-track,::-webkit-scrollbar-corner{background:transparent}
::-webkit-scrollbar-thumb{background:rgba(122,140,166,.45);border:2px solid transparent;background-clip:content-box;border-radius:99px}
::-webkit-scrollbar-thumb:hover{background:rgba(94,114,142,.68);background-clip:content-box}
::-webkit-scrollbar-thumb:active{background:rgba(74,94,122,.85);background-clip:content-box}
@supports not selector(::-webkit-scrollbar){
  *{scrollbar-width:thin;scrollbar-color:rgba(122,140,166,.45) transparent}
}
html{scroll-behavior:smooth}
/* 锚点定位留出吸顶导航高度，避免标题被导航遮住 */
section[id],h2[id],article[id],.sec[id]{scroll-margin-top:82px}
body{margin:0;font-family:-apple-system,"Segoe UI","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);font-size:15px;line-height:1.7;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
h1,h2,h3{margin:0;line-height:1.3}
img{max-width:100%}
.wrap,.container{max-width:1180px;margin:0 auto;padding:0 20px}
.small{font-size:13px}
.muted{color:var(--muted)}
code{background:#eef2f9;border:1px solid var(--line);border-radius:5px;padding:1px 6px;font-size:12.5px}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

/* ===== 顶部导航（servechina.cn 式二级下拉） ===== */
.nav{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.navrow{display:flex;align-items:center;gap:14px;height:var(--nav-h)}
.brand{display:flex;align-items:center;gap:9px;font-size:15px;flex:none}
.brand-logo{display:block;border-radius:7px}
.brand b{white-space:nowrap}
.links{flex:1;display:flex;justify-content:flex-end}
.navlist{display:flex;align-items:center;list-style:none;margin:0;padding:0}
.navlist>li{position:relative}
.navlist>li>a{display:flex;align-items:center;gap:5px;height:var(--nav-h);padding:0 13px;font-size:14px;color:var(--ink2);white-space:nowrap;transition:color .15s}
.navlist>li>a:hover,.navlist>li:focus-within>a{color:var(--brand)}
/* 下拉三角 */
.caret{width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;border-top:4.5px solid currentColor;opacity:.55;transition:transform .18s}
.navlist>li:hover .caret,.navlist>li:focus-within .caret{transform:rotate(180deg)}
/* 下拉面板 */
.navlist .sub{position:absolute;top:100%;left:0;min-width:230px;background:#fff;border:1px solid var(--line);border-top:3px solid var(--brand);border-radius:0 0 12px 12px;box-shadow:0 20px 44px rgba(15,34,70,.14);padding:9px;opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .18s,transform .18s,visibility .18s;z-index:40}
.navlist li:hover>.sub,.navlist li:focus-within>.sub{opacity:1;visibility:visible;transform:translateY(0)}
.navlist .sub ul{list-style:none;margin:0;padding:0}
.navlist .sub a{display:block;padding:9px 12px;border-radius:8px;font-size:13.5px;color:var(--ink2);white-space:nowrap;transition:.15s}
.navlist .sub a:hover{background:#f2f7ff;color:var(--brand)}
.cta{display:flex;gap:9px;align-items:center;flex:none}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:9px 16px;border-radius:9px;border:1px solid var(--line);background:#fff;font-size:14px;transition:.15s;cursor:pointer;font-family:inherit}
.btn:hover{border-color:var(--brand);color:var(--brand)}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn.primary:hover{background:var(--brand-d);color:#fff;border-color:var(--brand-d)}
.btn.ghost{background:transparent;border-color:transparent;color:var(--muted)}
.btn.ghost2{background:#fff;border-color:var(--line);color:var(--ink2)}
.btn.lg{padding:12px 22px;font-size:15px}
/* 汉堡按钮 */
.menubtn{display:none;flex-direction:column;justify-content:center;gap:4.5px;width:40px;height:38px;padding:0 9px;background:#fff;border:1px solid var(--line);border-radius:9px;cursor:pointer}
.menubtn span{display:block;height:2px;background:var(--ink2);border-radius:2px;transition:.2s}
.menubtn[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.menubtn[aria-expanded="true"] span:nth-child(2){opacity:0}
.menubtn[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

/* ===== Hero ===== */
.hero{background:linear-gradient(160deg,#0f2246 0%,#173a76 45%,#1f6feb 100%);color:#fff;padding:60px 0 70px;overflow:hidden}
.herorow{display:grid;grid-template-columns:1.02fr .98fr;gap:38px;align-items:center}
.pill{display:inline-block;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.3);border-radius:999px;padding:5px 14px;font-size:13px;margin-bottom:18px}
.hero h1{font-size:40px;letter-spacing:.5px}
.hero p{margin:18px 0 0;color:rgba(255,255,255,.86);font-size:16px;max-width:640px}
.hero p strong{color:#fff}
.btnrow{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.hero .btn{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.35);color:#fff}
.hero .btn:hover{background:rgba(255,255,255,.2);color:#fff}
.hero .btn.primary{background:#fff;border-color:#fff;color:var(--brand)}
.hero .btn.primary:hover{background:#eef4ff;color:var(--brand-d)}
.hero .btn.ghost2{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.3);color:#dce8ff}
.hero .btn.ghost2:hover{background:rgba(255,255,255,.18);color:#fff;border-color:rgba(255,255,255,.5)}
.proofline{display:flex;gap:18px;flex-wrap:wrap;margin-top:26px;font-size:13px;color:rgba(255,255,255,.72)}
.proofline span{position:relative;padding-left:14px}
.proofline span:before{content:"";position:absolute;left:0;top:50%;width:6px;height:6px;border-radius:50%;background:#7fb2ff;transform:translateY(-50%)}
.heroArt{margin:0;border-radius:16px;overflow:hidden;box-shadow:0 26px 64px rgba(8,20,45,.36);background:#fff;line-height:0}
.heroArt img{width:100%;height:auto;display:block}

/* ===== 业务场景横条 ===== */
.stripwrap{background:#fff;border-bottom:1px solid var(--line);padding:30px 0 34px}
.strip{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.strip li{text-align:center}
.strip img{width:100%;height:auto;display:block;border-radius:10px;border:1px solid var(--line);background:#f7fafe}
.strip b{display:block;margin-top:9px;font-size:13.5px;color:var(--ink)}
.strip span{display:block;font-size:12px;color:var(--muted);margin-top:2px}

/* ===== Section ===== */
.sec{padding:60px 0}
.sec h2{font-size:28px}
.lead{color:var(--muted);max-width:800px;margin:12px 0 30px}
.alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px;overflow:hidden}
.alt .card{background:#fbfcfe}
.cardimg{width:100%;height:auto;display:block;border-radius:10px;margin:-4px 0 12px;background:#f7fafe}
.card h3{font-size:16px;margin:0 0 6px}
.card p{margin:0;color:var(--muted);font-size:13.5px}
.ico{font-size:22px}

/* ===== 业务场景详述 ===== */
.scene{display:grid;grid-template-columns:.85fr 1.15fr;gap:34px;align-items:center;padding:26px 0;border-top:1px solid var(--line)}
.scene:first-of-type{border-top:0}
.scene.rev{grid-template-columns:1.15fr .85fr}
.scene.rev figure{order:2}
.scene figure{margin:0;background:#f7fafe;border:1px solid var(--line);border-radius:16px;overflow:hidden;line-height:0}
.scene figure img{width:100%;height:auto;display:block}
.scnum{display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:1px;color:var(--brand);background:#eaf2ff;border-radius:999px;padding:3px 11px;margin-bottom:10px}
.scene h3{font-size:21px;margin-bottom:10px}
.scene p{margin:0;color:var(--muted);font-size:14.5px}

/* ===== 模块 ===== */
.mods{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.mod{background:#fbfcfe;border:1px solid var(--line);border-radius:14px;padding:18px}
.mod h3{font-size:15px;margin-bottom:10px;color:var(--brand)}
.mod ul{margin:0;padding-left:18px;color:var(--muted);font-size:13.5px}
.mod li{margin-bottom:5px}

/* ===== 角色 ===== */
.role .scope{display:inline-block;background:#eaf2ff;color:#1d4ed8;border-radius:999px;padding:3px 11px;font-size:12.5px;margin-top:6px}
.role ul{margin:12px 0 0;padding-left:18px;color:var(--muted);font-size:13.5px}

/* ===== 表格 ===== */
.tablecard{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:auto}
table{width:100%;border-collapse:collapse;font-size:13.5px}
th,td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
th{background:#fafbfd;color:var(--muted);font-weight:600;font-size:12.5px;white-space:nowrap}
tbody tr:hover{background:#fafcff}
tbody tr:last-child td{border-bottom:0}

/* ===== 合规 ===== */
.alertbig{display:flex;gap:16px;background:#fff5f5;border:1px solid #f8c9c9;border-radius:14px;padding:20px}
.alertbig .ico{font-size:26px}
.alertbig p{margin:0 0 8px}
.alertbig p:last-child{margin:0;color:#8a4a4a;font-size:13.5px}

/* ===== FAQ ===== */
.faqlist{border:1px solid var(--line);border-radius:14px;background:#fff;overflow:hidden}
.faqlist details{border-top:1px solid var(--line)}
.faqlist details:first-child{border-top:0}
.faqlist summary{cursor:pointer;padding:15px 18px;font-weight:600;font-size:14.5px;list-style:none;position:relative;padding-right:44px}
.faqlist summary::-webkit-details-marker{display:none}
.faqlist summary:after{content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);color:var(--brand);font-size:19px;font-weight:400}
.faqlist details[open] summary:after{content:"−"}
.faqlist summary:hover{background:#fafcff}
.faqlist p{margin:0;padding:0 18px 16px;color:var(--muted);font-size:14px}

/* ===== 下载卡片 ===== */
.dlcard{display:block;transition:.18s}
.dlcard:hover{border-color:var(--brand);box-shadow:0 14px 34px rgba(31,111,235,.13);transform:translateY(-2px)}
.dlgo{display:inline-block;margin-top:12px;font-size:13.5px;font-weight:600;color:var(--brand)}
.dlgrid .card h3{font-size:16.5px}

/* ===== CTA band ===== */
.ctaband{background:linear-gradient(135deg,#12274f,#1f6feb);color:#fff;padding:44px 0}
.ctarow{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.ctaband h2{font-size:24px}
.ctaband p{margin:8px 0 0;color:rgba(255,255,255,.82);font-size:14.5px}
.ctaband .btnrow{margin-top:0}
.ctaband .btn{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.34);color:#fff}
.ctaband .btn:hover{background:rgba(255,255,255,.2);color:#fff}
.ctaband .btn.primary{background:#fff;border-color:#fff;color:var(--brand)}
.ctaband .btn.primary:hover{background:#eef4ff;color:var(--brand-d)}

/* ===== 页脚（对齐 zhubao.zerocod.cn 布局） ===== */
.site-footer{background:#0f1c33;color:#c7d1e0;padding:0 0 8px}
.footer-top-line{height:4px;background:linear-gradient(90deg,#1f6feb,#3d92f5,#7fb2ff)}
.footer-shell{padding-top:44px}
.footer-main{display:grid;grid-template-columns:1.3fr 2.5fr .95fr;gap:38px;align-items:start}
.footer-logo-link{display:flex;align-items:center;gap:11px}
.footer-logo{display:block;border-radius:10px}
.footer-logo-text{font-size:15.5px;font-weight:700;color:#fff;line-height:1.35}
.footer-slogan{margin:14px 0 0;font-size:13px;color:#9fb0c9;line-height:1.75;max-width:320px}
.footer-cta{display:inline-block;margin-top:16px;padding:10px 18px;border-radius:9px;background:var(--brand);color:#fff;font-size:14px;font-weight:600;transition:.15s}
.footer-cta:hover{background:var(--brand-d)}
.footer-nav-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.footer-col h4{margin:0 0 12px;font-size:14px;color:#fff;font-weight:700}
.footer-col-list{list-style:none;margin:0;padding:0}
.footer-col-list li{margin-bottom:2px}
.footer-col-list a{display:inline-block;padding:4px 0;font-size:13px;color:#9fb0c9;transition:.15s}
.footer-col-list a:hover{color:#7fb2ff}
.footer-qr-col{display:flex;justify-content:flex-end}
.footer-wechat{margin:0;text-align:center}
.footer-wechat img{display:block;background:#fff;border-radius:10px;padding:6px;margin:0 auto}
.footer-wechat figcaption{margin-top:10px;font-size:12px;color:#9fb0c9;line-height:1.6}
.footer-wechat figcaption strong{display:block;color:#fff;font-size:12.5px;margin-bottom:3px}
.footer-wechat figcaption span{display:block;max-width:150px;margin:0 auto}
.footer-trust-bar{border-top:1px solid rgba(255,255,255,.1);margin-top:36px;padding:20px 0}
.footer-trust-line{margin:0;font-size:13.5px;color:#c7d1e0}
.footer-trust-line strong{color:#fff}
.footer-trust-sep{margin:0 8px;opacity:.5}
.footer-trust-badges{list-style:none;display:flex;flex-wrap:wrap;gap:9px;margin:13px 0 0;padding:0}
.footer-trust-badges li{font-size:12.5px;color:#a9b8cd;border:1px solid rgba(255,255,255,.16);border-radius:999px;padding:3px 12px}
.footer-trust-meta{margin:13px 0 0;font-size:12.5px;color:#9fb0c9}
.footer-trust-meta a{color:#7fb2ff}
.footer-trust-meta a:hover{color:#a8c9ff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:16px 0 26px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;align-items:center}
.footer-copyright{font-size:12.5px;color:#8aa0b5;margin:0}
.footer-legal{font-size:12.5px;color:#8aa0b5;margin:0}
.footer-legal a{color:#9fb0c9}
.footer-legal a:hover{color:#7fb2ff}

/* ===== 移动端快捷联系条 ===== */
.mobile-contact-bar{display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;background:#fff;border-top:1px solid var(--line);box-shadow:0 -6px 20px rgba(15,34,70,.08)}
.mobile-contact-bar-btn{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:8px 0;font-size:11.5px;color:var(--ink2)}
.mobile-contact-bar-icon{font-size:16px}
.mobile-contact-bar-btn--cta{color:var(--brand);font-weight:600}

/* ===== 下载中心页 ===== */
.dlhero{background:linear-gradient(160deg,#0f2246 0%,#173a76 60%,#1f6feb 100%);color:#fff;padding:52px 0 56px}
.dlhero h1{font-size:34px}
.dlhero p{margin:14px 0 0;color:rgba(255,255,255,.85);max-width:760px;font-size:15.5px}
.dlitem{display:grid;grid-template-columns:220px 1fr;gap:26px;align-items:start;background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;margin-bottom:20px;scroll-margin-top:90px}
.dlitem figure{margin:0;background:#f7fafe;border:1px solid var(--line);border-radius:12px;overflow:hidden;line-height:0}
.dlitem figure img{width:100%;height:auto;display:block}
.dlitem h3{font-size:19px;margin-bottom:8px}
.dlitem p{margin:0 0 10px;color:var(--muted);font-size:14px}
.dlmeta{list-style:none;margin:0 0 14px;padding:0;font-size:13px;color:var(--muted)}
.dlmeta li{position:relative;padding-left:16px;margin-bottom:3px}
.dlmeta li:before{content:"";position:absolute;left:0;top:9px;width:5px;height:5px;border-radius:50%;background:#7fb2ff}
.dlnote{font-size:12.5px;color:var(--muted);margin-top:10px}

@media(max-width:1080px){
  .footer-main{grid-template-columns:1fr 1fr;gap:30px}
  .footer-qr-col{justify-content:flex-start}
  .strip{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:1000px){
  .herorow{grid-template-columns:1fr;gap:30px}
  .hero h1{font-size:32px}
  .grid4{grid-template-columns:repeat(2,1fr)}
  .grid3,.mods{grid-template-columns:1fr}
  .scene,.scene.rev{grid-template-columns:1fr;gap:18px}
  .scene.rev figure{order:0}
  .menubtn{display:flex}
  .cta .btn.ghost{display:none}
  .links{position:absolute;top:var(--nav-h);left:0;right:0;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 18px 36px rgba(15,34,70,.12);display:none;max-height:calc(100vh - var(--nav-h));overflow:auto}
  .links.open{display:block}
  .navlist{flex-direction:column;align-items:stretch;padding:8px 0}
  .navlist>li{border-top:1px solid var(--line)}
  .navlist>li:first-child{border-top:0}
  .navlist>li>a{height:auto;padding:13px 20px;font-size:15px;justify-content:space-between}
  .navlist .sub{position:static;opacity:1;visibility:visible;transform:none;border:0;border-top:0;box-shadow:none;border-radius:0;padding:0 20px 10px;display:none}
  .navlist li.open>.sub{display:block}
  .navlist .sub a{padding:9px 0;font-size:14px;color:var(--muted)}
  .navlist .sub a:hover{background:transparent}
  .navlist .sub ul{border-left:2px solid var(--line);padding-left:14px}
  .caret{display:none}
  .mobile-contact-bar{display:flex}
  body{padding-bottom:52px}
}
@media(max-width:760px){
  .footer-main{grid-template-columns:1fr;gap:26px}
  .footer-nav-grid{grid-template-columns:1fr 1fr}
  .dlitem{grid-template-columns:1fr;gap:16px}
  .dlitem figure{max-width:340px}
}
@media(max-width:560px){
  .grid4{grid-template-columns:1fr}
  .hero{padding:38px 0 46px}
  .sec{padding:42px 0}
  .sec h2{font-size:23px}
  .hero h1{font-size:27px}
  .brand b{font-size:13.5px}
  .strip{grid-template-columns:repeat(2,1fr)}
  .footer-nav-grid{grid-template-columns:1fr 1fr;gap:18px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .ctaband h2{font-size:20px}
}