:root{
  --ink:#16202e;
  --ink-2:#4a5768;
  --ink-3:#7d8a9c;
  --line:#e4e9f0;
  --line-2:#f0f4f8;
  --navy:#0e3a63;
  --steel:#2f6fb5;
  --accent:#d9691a;
  --accent-soft:#fdf0e3;
  --accent-line:#f2c9a0;
  --green:#1c7a4f;
  --green-soft:#eaf6ef;
  --red:#b5392f;
  --red-soft:#fdeeed;
  --part:#ffcf8a;
  --part-line:#c98a2e;
  --steel-a:#e3e8ef;
  --steel-a-line:#9aa5b5;
  --steel-b:#ccd6e2;
  --steel-b-line:#8293a8;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:#ffffff;
  color:var(--ink);
  font-family:"Segoe UI","Helvetica Neue",Helvetica,Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.78;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{line-height:1.3;letter-spacing:-0.01em;margin:0;}
p{margin:0 0 1.05em;}
a{color:var(--steel);}

.topbar{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(160%) blur(8px);
  border-bottom:1px solid var(--line);
}
.topbar-in{
  max-width:960px;margin:0 auto;padding:0 24px;height:56px;
  display:flex;align-items:center;gap:20px;
}
.brand{display:flex;align-items:center;gap:9px;font-weight:700;font-size:15px;color:var(--navy);white-space:nowrap;}
.brand svg{display:block;}
.topnav{margin-left:auto;display:flex;gap:18px;overflow-x:auto;scrollbar-width:none;}
.topnav::-webkit-scrollbar{display:none;}
.topnav a{
  font-size:13.5px;color:var(--ink-2);text-decoration:none;white-space:nowrap;
  padding:4px 0;border-bottom:2px solid transparent;
}
.topnav a:hover{color:var(--navy);border-bottom-color:var(--accent);}

.wrap{max-width:880px;margin:0 auto;padding:0 24px;}

.hero{
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,#fbfcfe 0%,#ffffff 100%);
  position:relative;overflow:hidden;
}
.hero-bg{
  position:absolute;inset:0;
  background-image:
    linear-gradient(var(--line-2) 1px,transparent 1px),
    linear-gradient(90deg,var(--line-2) 1px,transparent 1px);
  background-size:38px 38px;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),rgba(0,0,0,0) 78%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),rgba(0,0,0,0) 78%);
  pointer-events:none;
}
.hero-in{position:relative;max-width:880px;margin:0 auto;padding:64px 24px 52px;}
.kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:700;letter-spacing:.11em;text-transform:uppercase;
  color:var(--accent);background:var(--accent-soft);border:1px solid var(--accent-line);
  padding:6px 12px;border-radius:999px;margin-bottom:22px;
}
.kicker i{width:6px;height:6px;border-radius:50%;background:var(--accent);display:block;}
h1{font-size:43px;font-weight:800;color:var(--navy);margin-bottom:16px;letter-spacing:-0.022em;}
h1 em{font-style:normal;color:var(--accent);}
.lede{font-size:18.5px;color:var(--ink-2);max-width:660px;line-height:1.7;}
.meta{
  margin-top:26px;display:flex;flex-wrap:wrap;gap:10px 26px;
  font-size:14px;color:var(--ink-3);border-top:1px solid var(--line);padding-top:18px;
}
.meta b{color:var(--ink-2);font-weight:600;}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:34px 0 0;}
.stat{
  background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 16px 14px;
  box-shadow:0 1px 2px rgba(16,32,51,.04);
}
.stat .n{font-size:26px;font-weight:800;color:var(--navy);letter-spacing:-.02em;line-height:1.1;}
.stat .n span{font-size:15px;color:var(--accent);}
.stat .t{font-size:13.5px;color:var(--ink-3);margin-top:4px;line-height:1.4;}

section{padding:56px 0 8px;}
.eyebrow{
  font-size:12.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  color:var(--steel);margin-bottom:10px;
}
h2{font-size:30px;font-weight:800;color:var(--navy);margin-bottom:14px;letter-spacing:-.02em;}
h3{font-size:20px;font-weight:700;color:var(--navy);margin:34px 0 10px;}
h4{font-size:16px;font-weight:700;color:var(--navy);margin-bottom:8px;}
.sub{color:var(--ink-2);font-size:17px;}
hr.rule{border:0;border-top:1px solid var(--line);margin:52px 0 0;}

.callout{
  background:var(--accent-soft);border:1px solid var(--accent-line);border-left:4px solid var(--accent);
  border-radius:10px;padding:18px 20px;margin:26px 0;
}
.callout p:last-child{margin-bottom:0;}
.callout .ct{font-weight:700;color:#9c4a10;margin-bottom:6px;font-size:15px;}
.note{
  background:#f7f9fc;border:1px solid var(--line);border-left:4px solid var(--steel);
  border-radius:10px;padding:18px 20px;margin:26px 0;
}
.note .ct{font-weight:700;color:var(--navy);margin-bottom:6px;font-size:15px;}

.tablewrap{
  border:1px solid var(--line);border-radius:12px;overflow:hidden;margin:26px 0 10px;
  box-shadow:0 1px 2px rgba(16,32,51,.04);
}
.tscroll{overflow-x:auto;}
table{width:100%;border-collapse:collapse;font-size:16px;min-width:640px;}
thead th{
  background:var(--navy);color:#fff;text-align:left;font-weight:600;font-size:14.5px;
  letter-spacing:.02em;padding:12px 16px;white-space:nowrap;
}
tbody td{padding:13px 16px;border-top:1px solid var(--line);vertical-align:top;color:var(--ink);}
tbody tr:nth-child(even){background:#fafbfd;}
tbody td:first-child{font-weight:600;color:var(--navy);white-space:nowrap;}
td .cn{display:block;font-size:13px;color:var(--ink-3);font-weight:400;}
.pill{
  display:inline-block;font-size:12.5px;font-weight:700;padding:2px 9px;border-radius:999px;
  border:1px solid transparent;white-space:nowrap;
}
.pill.g{background:var(--green-soft);color:var(--green);border-color:#c6e6d4;}
.pill.o{background:var(--accent-soft);color:#9c4a10;border-color:var(--accent-line);}
.pill.r{background:var(--red-soft);color:var(--red);border-color:#f3cfcb;}
.pill.b{background:#eef4fb;color:var(--steel);border-color:#cfe0f3;}

.method{
  margin:34px 0 44px;border:1px solid var(--line);border-radius:14px;
  background:#fff;box-shadow:0 1px 3px rgba(16,32,51,.05);overflow:hidden;
}
.mhead{
  display:flex;gap:16px;align-items:flex-start;
  padding:22px 24px 18px;border-bottom:1px solid var(--line);background:#fcfdff;
}
.num{
  flex:0 0 auto;width:46px;height:46px;border-radius:11px;
  background:var(--navy);color:#fff;display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:17px;letter-spacing:-.02em;
}
.mhead .tt{flex:1;min-width:0;}
.mhead h3{margin:0 0 4px;font-size:23px;font-weight:800;color:var(--navy);letter-spacing:-.018em;}
.mhead h3 .cn{
  font-size:14px;font-weight:600;color:var(--accent);background:var(--accent-soft);
  border:1px solid var(--accent-line);border-radius:6px;padding:2px 8px;margin-left:8px;
  vertical-align:middle;white-space:nowrap;
}
.tagline{margin:0;color:var(--ink-2);font-size:16px;line-height:1.6;}
.mbody{padding:20px 24px 24px;}

figure{margin:20px 0 22px;}
.figbox{
  border:1px solid var(--line);border-radius:10px;background:#fdfefe;
  padding:14px 10px 8px;overflow:hidden;
}
svg.fig{display:block;width:100%;height:auto;}
figcaption{
  font-size:14px;color:var(--ink-3);margin-top:10px;text-align:center;line-height:1.55;
}
figcaption b{color:var(--ink-2);font-weight:600;}

.stA{fill:var(--steel-a);stroke:var(--steel-a-line);stroke-width:1.4;}
.stB{fill:var(--steel-b);stroke:var(--steel-b-line);stroke-width:1.4;}
.stC{fill:#b9c6d6;stroke:#7c8ba0;stroke-width:1.2;}
.pt{fill:var(--part);stroke:var(--part-line);stroke-width:1.5;}
.ej{fill:#f0903c;stroke:#a9500f;stroke-width:1.5;}
.ejd{fill:#d9691a;stroke:#8f4207;stroke-width:1.5;}
.navyp{fill:#14406e;stroke:#0a2846;stroke-width:1.4;}
.ghost{fill:none;stroke:var(--red);stroke-width:1.7;stroke-dasharray:6 4;}
.lead{stroke:#98a2b3;stroke-width:1.1;fill:none;}
.lead-d{stroke:#98a2b3;stroke-width:1.1;fill:none;stroke-dasharray:4 3;}
.ar{stroke:var(--red);stroke-width:2.4;fill:none;}
.arh{fill:var(--red);}
.ar-blue{stroke:#1f7ac0;stroke-width:2.2;fill:none;}
.arh-blue{fill:#1f7ac0;}
.lb{font-size:13px;fill:#33445c;font-family:inherit;}
.lb-b{font-size:13px;fill:var(--navy);font-weight:700;font-family:inherit;}
.lb-w{font-size:13px;fill:#fff;font-weight:600;font-family:inherit;}
.lb-e{font-size:13px;fill:#a9500f;font-weight:700;font-family:inherit;}
.lb-r{font-size:12.5px;fill:var(--red);font-weight:700;font-family:inherit;}
.lb-dim{font-size:12px;fill:#5b6a80;font-family:inherit;}

.pc{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:6px;}
.box{border:1px solid var(--line);border-radius:10px;padding:15px 17px;background:#fff;}
.box.use{background:var(--green-soft);border-color:#c6e6d4;}
.box.care{background:var(--red-soft);border-color:#f3cfcb;}
.box h4{display:flex;align-items:center;gap:7px;margin-bottom:7px;font-size:15px;}
.box.use h4{color:var(--green);}
.box.care h4{color:var(--red);}
.box ul{margin:0;padding-left:19px;}
.box li{margin-bottom:5px;font-size:15.5px;line-height:1.6;}
.box li:last-child{margin-bottom:0;}

.spec{
  display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin:18px 0 4px;
  border:1px solid var(--line);border-radius:10px;overflow:hidden;
}
.spec div{padding:12px 15px;border-right:1px solid var(--line);background:#fafbfd;}
.spec div:last-child{border-right:0;}
.spec .k{font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-3);font-weight:700;}
.spec .v{font-size:16px;font-weight:600;color:var(--navy);margin-top:2px;}

.dec{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:26px 0 8px;}
.dcard{
  border:1px solid var(--line);border-radius:11px;padding:16px 18px;background:#fff;
  display:flex;gap:14px;align-items:flex-start;
}
.dcard .ic{
  flex:0 0 auto;width:38px;height:38px;border-radius:9px;background:#eef4fb;border:1px solid #cfe0f3;
  display:flex;align-items:center;justify-content:center;color:var(--steel);font-weight:800;font-size:14px;
}
.dcard .q{font-weight:700;color:var(--navy);font-size:16px;margin-bottom:2px;}
.dcard .a{font-size:15.5px;color:var(--ink-2);line-height:1.6;}
.dcard .a b{color:var(--accent);}

.comp{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:26px 0 8px;}
.ccard{border:1px solid var(--line);border-radius:11px;overflow:hidden;background:#fff;}
.ccard .ch{background:#f4f7fb;border-bottom:1px solid var(--line);padding:11px 15px;font-weight:700;color:var(--navy);font-size:15px;}
.ccard .cb{padding:13px 15px;font-size:15.5px;color:var(--ink-2);line-height:1.6;}
.ccard .cb span{color:var(--ink-3);font-size:13.5px;display:block;margin-top:5px;}

.check{list-style:none;padding:0;margin:22px 0 6px;}
.check li{
  position:relative;padding:11px 0 11px 34px;border-bottom:1px solid var(--line-2);font-size:16px;
}
.check li:last-child{border-bottom:0;}
.check li::before{
  content:"";position:absolute;left:6px;top:17px;width:11px;height:11px;
  border:2px solid var(--steel);border-radius:3px;
}
.check li b{color:var(--navy);}

.formula{
  background:#f7f9fc;border:1px solid var(--line);border-radius:10px;
  padding:18px 20px;margin:22px 0;font-size:16px;
}
.fml{
  font-family:"Cambria Math",Georgia,"Times New Roman",serif;font-size:20px;
  color:var(--navy);background:#fff;border:1px solid var(--line);border-radius:8px;
  padding:12px 16px;display:inline-block;margin:6px 0 12px;
}
.fml i{font-style:italic;}
.flist{margin:0;padding-left:20px;color:var(--ink-2);font-size:15.5px;}
.flist li{margin-bottom:4px;}

.cta{
  margin-top:64px;
  background:#1e3a5f;
  border-radius:6px;
  color:#fff;
  display:flex;gap:48px;align-items:center;
  padding:46px 52px;
}
.cta .cta-l{flex:1.6;min-width:0;}
.cta h2{color:#fff;margin:0 0 12px;font-size:26px;letter-spacing:-.015em;}
.cta .cta-p{color:#c7d5e6;font-size:16px;line-height:1.7;margin:0 0 24px;max-width:520px;}
.cta-btn{
  display:inline-block;background:#f4771f;color:#fff;text-decoration:none;
  font-size:17px;font-weight:700;letter-spacing:.01em;
  padding:15px 34px;border-radius:4px;
  transition:background .18s ease, transform .18s ease;
}
.cta-btn:hover{background:#ff8a33;transform:translateY(-1px);}
.cta .cta-r{
  flex:1;min-width:0;border-left:1px solid rgba(255,255,255,.28);
  padding-left:44px;
}
.cta .cta-brand{font-weight:800;font-size:19px;margin-bottom:14px;color:#fff;}
.cta .cta-r ul{list-style:none;margin:0;padding:0;}
.cta .cta-r li{
  color:#c7d5e6;font-size:15.5px;line-height:1.6;
  padding:5px 0 5px 18px;position:relative;
}
.cta .cta-r li::before{
  content:"";position:absolute;left:0;top:14px;width:7px;height:7px;
  border-radius:50%;background:#f4771f;
}
@media (max-width:720px){
  .cta{flex-direction:column;align-items:stretch;gap:28px;padding:34px 26px;}
  .cta .cta-r{border-left:0;padding-left:0;border-top:1px solid rgba(255,255,255,.28);padding-top:24px;}
}

footer{margin-top:60px;border-top:1px solid var(--line);background:#fbfcfe;}
.foot-in{max-width:880px;margin:0 auto;padding:34px 24px 46px;color:var(--ink-3);font-size:14.5px;}
.foot-in b{color:var(--ink-2);}
.foot-in p{margin:0 0 8px;}

@media (max-width:720px){
  h1{font-size:32px;}
  h2{font-size:25px;}
  .stats{grid-template-columns:repeat(2,1fr);}
  .pc{grid-template-columns:1fr;}
  .dec{grid-template-columns:1fr;}
  .comp{grid-template-columns:1fr;}
  .spec{grid-template-columns:1fr;}
  .spec div{border-right:0;border-bottom:1px solid var(--line);}
  .topnav{display:none;}
  .hero-in{padding:44px 24px 38px;}
}