*{box-sizing:border-box}
html{scroll-behavior:smooth}
:root{
  --bg:#0b0b0c;
  --bg-soft:#121316;
  --bg-panel:#16181c;
  --bg-panel-2:#1b1e23;
  --line:#2a2d33;
  --line-soft:rgba(255,255,255,.08);
  --text:#f5efe7;
  --muted:#d7cfc4;
  --soft:#a79e92;
  --gold:#d8b26d;
  --gold-deep:#b8893c;
  --gold-soft:rgba(216,178,109,.15);
  --shadow:0 24px 80px rgba(0,0,0,.38);
  --radius:24px;
  --container:1240px;
}
html,body{margin:0;padding:0}
body{
  background:
    radial-gradient(circle at 15% 10%, rgba(216,178,109,.10), transparent 28%),
    radial-gradient(circle at 82% 18%, rgba(216,178,109,.08), transparent 26%),
    radial-gradient(circle at 72% 78%, rgba(216,178,109,.06), transparent 22%),
    linear-gradient(180deg,#0b0b0c 0%,#101113 100%);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;
  line-height:1.6;
}
body.lock{overflow:hidden}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
button,input,textarea,select{font:inherit}
button{cursor:pointer;border:0;background:none;color:inherit}
main{padding-bottom:48px}
.brief-head{
  position:sticky;top:0;z-index:60;
  display:flex;align-items:center;justify-content:space-between;gap:22px;
  height:78px;padding:0 max(22px,4vw);
  background:rgba(11,11,12,.88);
  backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line-soft);
}
.brand-text{
  flex:0 0 auto;
  font-size:20px;font-weight:800;letter-spacing:.04em;
  color:#fff;
}
.brief-head nav{
  display:flex;align-items:center;justify-content:center;gap:28px;
  margin-left:auto;
}
.brief-head nav a{
  color:var(--muted);
  font-size:14px;
  transition:.25s ease;
}
.brief-head nav a:hover{color:#fff}
.menu-toggle{
  display:none;
  min-width:72px;height:42px;padding:0 16px;border-radius:999px;
  border:1px solid rgba(255,255,255,.12);
  background:#17181b;color:#fff;
}
.head-contact,
.float-contact,
.table-btn,
.device-row button,
.footer-links button,
.service-card button{
  appearance:none;
}
.head-contact{
  flex:0 0 auto;
  height:46px;padding:0 18px;border-radius:999px;
  background:linear-gradient(180deg,var(--gold),#c99a56);
  color:#17130c;font-weight:700;box-shadow:0 10px 28px rgba(216,178,109,.22);
}

.brief-hero,
.brief-points,
.service-index,
.brief-section,
.brief-devices,
.compare,
.download-card,
.flow,
.faq,
.site-footer,
.sub-hero{
  width:min(var(--container),calc(100% - 48px));
  margin-left:auto;
  margin-right:auto;
}

.brief-hero{
  display:grid;
  grid-template-columns: minmax(320px, 1fr) minmax(360px, 620px);
  gap:30px;
  padding:56px 0 18px;
  align-items:end;
}
.brief-hero>div:first-child{
  padding:22px 0 10px;
}
.brief-hero>div:first-child span,
.sub-hero p,
.section-title p,
.download-card p,
.support-section .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  color:var(--gold);
  font-size:13px;font-weight:700;
  text-transform:uppercase;letter-spacing:.16em;
  margin:0 0 14px;
}
.brief-hero h1,
.sub-hero h1{
  margin:0;
  color:#fff;
  line-height:1.1;
  letter-spacing:-.03em;
}
.brief-hero h1{font-size:clamp(36px,6vw,72px);max-width:8.2em}
.hero-panel{
  padding:28px;
  border-radius:34px;
  background:
    linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02)),
    linear-gradient(180deg,#17191d,#111316);
  border:1px solid rgba(255,255,255,.08);
  box-shadow:var(--shadow);
}
.hero-panel p{
  margin:0 0 22px;
  color:var(--muted);
  font-size:16px;
  max-width:36em;
}
.hero-panel img{
  width:100%;
  max-height:460px;
  object-fit:contain;
  margin:0 auto 22px;
}
.hero-actions{
  display:flex;flex-wrap:wrap;gap:14px;
}
.button{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:50px;padding:0 22px;border-radius:999px;
  font-weight:700;letter-spacing:.01em;
  transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease, background .18s ease;
}
.button:hover,.table-btn:hover,.device-row button:hover,.footer-links button:hover,.head-contact:hover,.float-contact:hover,.menu-toggle:hover{
  transform:translateY(-1px);
}
.button.primary{
  background:linear-gradient(180deg,var(--gold),#ca9c59);
  color:#17130c;
  box-shadow:0 14px 30px rgba(216,178,109,.22);
}
.button.secondary{
  background:#1c1f24;
  color:#fff;
  border:1px solid rgba(255,255,255,.12);
}
.button.ghost{
  background:transparent;
  color:var(--muted);
  border:1px solid rgba(255,255,255,.12);
}
.button.ghost:hover{color:#fff;border-color:rgba(255,255,255,.22)}

.brief-points{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:18px;
  padding:14px 0 16px;
}
.brief-points article,
.service-card,
.authority-grid article,
.device-row,
.compare,
.download-card,
.flow,
.security-grid article,
.scenario-grid article,
.faq details,
.support-section,
.qr-card,
.sub-hero{
  background:
    linear-gradient(180deg, rgba(255,255,255,.035), rgba(255,255,255,.02)),
    var(--bg-panel);
  border:1px solid rgba(255,255,255,.08);
  box-shadow:var(--shadow);
}
.brief-points article{
  padding:22px 22px 20px;
  border-radius:24px;
}
.brief-points h2{
  margin:0 0 10px;
  color:#fff;
  font-size:20px;
}
.brief-points p{
  margin:0;
  color:var(--muted);
  font-size:15px;
}

.service-index{
  display:grid;
  grid-template-columns:1.2fr 1fr 1fr 1fr;
  gap:18px;
  padding:18px 0 10px;
}
.service-card{
  display:flex;flex-direction:column;justify-content:space-between;
  min-height:240px;
  padding:24px;
  border-radius:28px;
  text-align:left;
  transition:transform .2s ease,border-color .2s ease, background .2s ease;
}
.service-card:hover{transform:translateY(-2px);border-color:rgba(216,178,109,.35)}
.service-card small{
  color:var(--gold);
  font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
}
.service-card h2,.service-card h3{
  margin:12px 0 10px;
  color:#fff;line-height:1.2;
}
.service-card h2{font-size:28px}
.service-card h3{font-size:24px}
.service-card p{
  margin:0;
  color:var(--muted);
  font-size:15px;
}
.service-card strong{
  margin-top:18px;
  color:#fff;
  font-size:15px;
  word-break:break-word;
}
.service-card.official{
  background:
    linear-gradient(180deg, rgba(216,178,109,.16), rgba(216,178,109,.03)),
    var(--bg-panel);
}
.service-card.download{
  background:
    linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02)),
    linear-gradient(180deg,#1b1e23,#14161a);
}
.service-card.js-contact,
.service-card[type="button"]{
  color:inherit;
}

.brief-section,
.compare,
.download-card,
.flow,
.faq{
  margin-top:18px;
  border-radius:34px;
  padding:28px;
}
.section-title{
  margin-bottom:20px;
}
.section-title h2,
.compare h2,
.flow h2,
.faq h2,
.support-section h2,
.sub-hero h1{
  font-size:clamp(28px,3vw,42px);
}
.section-title h2,
.compare h2,
.flow h2,
.faq h2,
.support-section h2{
  margin:0 0 10px;color:#fff;line-height:1.12;
}
.section-title span,
.download-card span,
.support-section span,
.sub-hero span,
.flow p{
  display:block;
  color:var(--muted);
  font-size:16px;
  max-width:58em;
}

.authority-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:18px;
}
.authority-grid article,
.security-grid article,
.scenario-grid article{
  padding:22px;border-radius:24px;
}
.authority-grid b,
.security-grid b{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:999px;
  background:var(--gold-soft);color:var(--gold);font-size:13px;
}
.authority-grid h3,
.security-grid h3,
.scenario-grid h3{
  margin:14px 0 10px;color:#fff;font-size:20px;line-height:1.2;
}
.authority-grid p,
.security-grid p,
.scenario-grid p,
.device-row p,
.device-row small{
  margin:0;color:var(--muted);
}

.brief-devices{
  display:flex;flex-direction:column;gap:16px;
  padding-top:18px;
}
.device-row{
  display:grid;
  grid-template-columns:72px 120px minmax(0,1fr) 110px 110px;
  align-items:center;
  gap:18px;
  padding:22px 24px;
  border-radius:28px;
}
.device-row>span{
  display:flex;align-items:center;justify-content:center;
  width:56px;height:56px;border-radius:16px;
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.08);
  color:var(--gold);font-weight:800;
}
.device-row img{
  width:100%;height:98px;object-fit:contain;
}
.device-row h3{
  margin:0 0 6px;color:#fff;font-size:26px;line-height:1.15;
}
.device-row p{font-size:15px}
.device-row small{display:block;margin-top:6px;font-size:13px;color:var(--soft)}
.device-row b{
  color:#fff;font-size:30px;white-space:nowrap;
}
.device-row button,
.table-btn,
.footer-links button{
  min-height:44px;padding:0 16px;border-radius:999px;
  border:1px solid rgba(216,178,109,.45);
  background:rgba(216,178,109,.10);
  color:#f4dfbc;font-weight:700;
}

.table-wrap{overflow:auto}
table{
  width:100%;
  border-collapse:collapse;
  min-width:860px;
}
thead th{
  padding:15px 16px;
  border-bottom:1px solid var(--line);
  color:#fff;
  font-size:14px;
  text-align:left;
  background:rgba(255,255,255,.02);
}
tbody td{
  padding:16px;
  border-bottom:1px solid rgba(255,255,255,.06);
  color:var(--muted);
  vertical-align:top;
}
tbody tr:hover td{background:rgba(255,255,255,.015)}
tbody td:first-child{color:#fff;font-weight:700}
tbody td:nth-child(2){color:#f4dfbc;font-weight:700}

.scenario-grid,
.security-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:18px;
}

.download-card{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto;
  align-items:center;
  gap:22px;
}
.download-card h2{
  margin:0 0 10px;
  color:#fff;
  font-size:clamp(28px,3vw,40px);
  line-height:1.12;
}
.download-card .button{white-space:nowrap}

.flow>div{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:14px;
  margin:22px 0 18px;
}
.flow b{
  display:flex;align-items:center;justify-content:center;
  min-height:74px;padding:14px 16px;
  border-radius:20px;
  background:rgba(255,255,255,.03);
  border:1px solid rgba(255,255,255,.08);
  color:#fff;font-size:16px;text-align:center;
}
.flow p{margin:0}

.faq details{
  border-radius:24px;
  padding:20px 22px;
}
.faq details+details{margin-top:14px}
.faq summary{
  list-style:none;
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;
  color:#fff;font-size:18px;font-weight:700;
  cursor:pointer;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";
  color:var(--gold);
  font-size:24px;
  line-height:1;
}
.faq details[open] summary::after{content:"−"}
.faq details p{
  margin:14px 0 0;
  color:var(--muted);
  font-size:15px;
}

.support-section{
  display:grid;
  grid-template-columns:minmax(0,1.25fr) 320px;
  gap:22px;
}
.support-section .tags{
  display:flex;flex-wrap:wrap;gap:10px;
  margin:18px 0 22px;
}
.support-section .tags em{
  padding:8px 12px;border-radius:999px;
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.08);
  color:var(--muted);
  font-style:normal;font-size:14px;
}
.qr-card{
  padding:22px;
  border-radius:28px;
}
.qr-card img,
.modal-card img{
  width:100%;
  max-width:240px;
  margin:0 auto 16px;
  border-radius:18px;
  background:#fff;
  padding:10px;
}
.qr-card h3,
.modal-card h3{
  margin:0 0 8px;
  color:#fff;
  font-size:22px;
  text-align:center;
}
.qr-card p,
.modal-card p{
  margin:0;
  color:var(--muted);
  text-align:center;
}

.site-footer{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto;
  gap:24px;
  margin-top:24px;
  margin-bottom:28px;
  padding:24px 28px;
  border-radius:30px;
  background:linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.02)), #131519;
  border:1px solid rgba(255,255,255,.08);
  box-shadow:var(--shadow);
}
.site-footer strong{
  display:block;margin-bottom:8px;color:#fff;font-size:22px;
}
.site-footer p{
  margin:0;color:var(--muted);max-width:44em;
}
.footer-links{
  display:flex;flex-wrap:wrap;gap:12px;align-content:flex-start;justify-content:flex-end;
}
.footer-links a,
.footer-links button{
  padding:10px 14px;border-radius:999px;
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.08);
  color:var(--muted);
  min-height:44px;
  display:inline-flex;align-items:center;justify-content:center;
}
.footer-links a:hover,
.footer-links button:hover{color:#fff;border-color:rgba(216,178,109,.35)}

.sub-main{padding-top:18px}
.sub-hero{
  margin-top:18px;
  margin-bottom:18px;
  padding:30px;
  border-radius:32px;
}

.modal{
  position:fixed;inset:0;z-index:120;
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .2s ease, visibility .2s ease;
}
.modal.active{
  opacity:1;visibility:visible;pointer-events:auto;
}
.modal-mask{
  position:absolute;inset:0;
  background:rgba(0,0,0,.62);
  backdrop-filter:blur(8px);
}
.modal-card{
  position:relative;
  width:min(440px,calc(100% - 28px));
  margin:8vh auto 0;
  padding:24px;
  border-radius:28px;
  background:linear-gradient(180deg,#181a1f,#111317);
  border:1px solid rgba(255,255,255,.10);
  box-shadow:var(--shadow);
}
.close{
  position:absolute;top:12px;right:12px;
  width:38px;height:38px;border-radius:999px;
  background:rgba(255,255,255,.06);
  color:#fff;font-size:22px;
}
.modal-actions{
  display:flex;gap:12px;justify-content:center;flex-wrap:wrap;
  margin-top:18px;
}
.float-contact{
  position:fixed;
  right:18px;bottom:18px;z-index:70;
  min-width:132px;height:52px;padding:0 18px;border-radius:999px;
  background:linear-gradient(180deg,var(--gold),#ca9c59);
  color:#17130c;font-weight:800;
  box-shadow:0 18px 36px rgba(216,178,109,.24);
}

@media (max-width:1100px){
  .service-index{grid-template-columns:repeat(2,minmax(0,1fr))}
  .authority-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .brief-hero{grid-template-columns:1fr}
  .device-row{
    grid-template-columns:60px 110px minmax(0,1fr) 100px 92px;
  }
  .support-section{grid-template-columns:1fr}
  .site-footer{grid-template-columns:1fr}
  .footer-links{justify-content:flex-start}
}
@media (max-width:860px){
  .brief-head{
    flex-wrap:wrap;height:auto;padding:16px 20px;
    justify-content:space-between;
  }
  .menu-toggle{display:inline-flex;align-items:center;justify-content:center}
  .head-contact{order:3;width:100%;justify-content:center}
  .brief-head nav{
    display:none;
    width:100%;
    order:4;
    margin:0;
    padding:10px 0 4px;
    flex-direction:column;
    align-items:flex-start;
    gap:12px;
  }
  .brief-head nav.is-open{display:flex}
  .brief-head nav a{font-size:15px}
  .brief-points{grid-template-columns:1fr}
  .service-index,
  .authority-grid,
  .scenario-grid,
  .security-grid{grid-template-columns:1fr}
  .device-row{
    grid-template-columns:1fr;
    text-align:left;
  }
  .device-row>span{width:48px;height:48px}
  .device-row img{height:92px;justify-self:start}
  .device-row b{font-size:28px}
  .device-row button{width:100%}
  .download-card{grid-template-columns:1fr}
  .download-card .button{width:100%}
  .flow>div{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:560px){
  .brief-hero,
  .brief-points,
  .service-index,
  .brief-section,
  .brief-devices,
  .compare,
  .download-card,
  .flow,
  .faq,
  .site-footer,
  .sub-hero{
    width:min(var(--container),calc(100% - 28px));
  }
  .brief-hero{padding-top:30px}
  .brief-hero h1{font-size:36px;max-width:none}
  .hero-panel,
  .brief-section,
  .compare,
  .download-card,
  .flow,
  .faq,
  .site-footer,
  .sub-hero{padding:20px}
  .service-card{padding:20px;min-height:220px}
  .service-card h2,.service-card h3{font-size:24px}
  .flow>div{grid-template-columns:1fr}
  .float-contact{
    left:14px;right:14px;bottom:14px;
    width:auto;
  }
}