/* 思豹 SP·BAO — 官网样式
   色彩体系：墨青 #1B4443 / 奶白 #F3EEE3 / 陶土 #C86B58 / 中青 #2E6360 */

:root{
  --ink:#1B4443;
  --bone:#F3EEE3;
  --clay:#C86B58;
  --mid:#2E6360;
  --ink-90:rgba(27,68,67,.9);
  --ink-70:rgba(27,68,67,.7);
  --ink-45:rgba(27,68,67,.45);
  --line:rgba(27,68,67,.14);
  --paper:#FBFAF6;
  --max:1140px;
  --r:14px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bone);
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;
  font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
.kicker{font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--clay);margin:0 0 14px}
.eyebrow{font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--clay);margin:0 0 12px}
h1,h2,h3{margin:0;letter-spacing:.01em;line-height:1.25}
h2{font-size:clamp(22px,2.6vw,30px);font-weight:700}
h3{font-size:17px;font-weight:700}
p{margin:0}
.lead{font-size:clamp(15px,1.5vw,17px);color:var(--ink-70);max-width:62ch;margin-top:16px}
.mono{font-family:"SF Mono",ui-monospace,Consolas,"Courier New",monospace}

/* ---------- header ---------- */
.site-head{
  position:sticky;top:0;z-index:50;
  background:rgba(243,238,227,.88);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
}
.site-head .wrap{display:flex;align-items:center;gap:28px;height:70px}
.brand{display:flex;align-items:center;flex:0 0 auto}
.brand img{width:186px;height:auto}
.nav{display:flex;gap:26px;margin-left:auto;font-size:14px}
.nav a{color:var(--ink-70);transition:color .18s}
.nav a:hover{color:var(--clay)}
.head-cta{
  flex:0 0 auto;font-size:14px;font-weight:600;
  border:1px solid var(--ink);border-radius:999px;padding:8px 18px;
  transition:background .18s,color .18s;
}
.head-cta:hover{background:var(--ink);color:var(--bone)}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:var(--ink);color:var(--bone);
  padding:88px 0 76px;
}
.hero::after{
  content:"";position:absolute;inset:auto -12% -46% 44%;
  width:70vw;height:70vw;max-width:900px;max-height:900px;
  background:radial-gradient(circle at 50% 50%,rgba(46,99,96,.55),rgba(27,68,67,0) 62%);
  pointer-events:none;
}
.hero .wrap{position:relative;z-index:1}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:56px;align-items:center}
.hero h1{font-size:clamp(30px,4.2vw,50px);font-weight:700;letter-spacing:.01em}
.hero h1 em{font-style:normal;color:var(--clay)}
.hero p.lead{color:rgba(243,238,227,.76)}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  border-radius:999px;padding:12px 26px;font-size:15px;font-weight:600;
  border:1px solid transparent;transition:.18s;
}
.btn-primary{background:var(--clay);color:#fff}
.btn-primary:hover{background:#b95b48}
.btn-ghost{border-color:rgba(243,238,227,.4);color:var(--bone)}
.btn-ghost:hover{border-color:var(--bone);background:rgba(243,238,227,.08)}
.hero-mark{display:flex;justify-content:center}
.hero-mark img{width:min(100%,360px);height:auto}

.spec-strip{
  margin-top:56px;padding-top:26px;
  border-top:1px solid rgba(243,238,227,.16);
  display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:22px;
}
.spec-strip dt{font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:rgba(243,238,227,.5)}
.spec-strip dd{margin:6px 0 0;font-size:17px;font-weight:600}

/* ---------- sections ---------- */
section{padding:76px 0}
.sec-head{max-width:70ch;margin-bottom:38px}
.sec-head p{margin-top:14px;color:var(--ink-70);font-size:15px}

.grid-4{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:16px}
.grid-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}

.card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--r);
  padding:26px 24px;
}
.card .tag{
  display:inline-block;font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--mid);border:1px solid rgba(46,99,96,.3);border-radius:999px;
  padding:3px 10px;margin-bottom:14px;
}
.card p{color:var(--ink-70);font-size:14px;margin-top:10px}

/* backronym panel */
.back{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.back div{
  border-left:3px solid var(--clay);background:var(--paper);
  border-radius:0 12px 12px 0;padding:16px 20px;font-size:14px;color:var(--ink-70);
}
.back b{color:var(--ink);font-weight:700}
.back-source{margin-top:18px;font-size:14px;color:var(--ink-70)}
.back-source code{
  font-family:"SF Mono",ui-monospace,Consolas,monospace;
  background:rgba(27,68,67,.07);border-radius:5px;padding:2px 7px;color:var(--ink);
}

/* products */
.products{background:var(--paper);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.prod{
  background:#fff;border:1px solid var(--line);border-radius:var(--r);
  padding:0;overflow:hidden;display:flex;flex-direction:column;
}
.prod-top{background:var(--ink);color:var(--bone);padding:22px 24px}
.prod-top .code{font-size:12px;letter-spacing:.2em;color:rgba(243,238,227,.55)}
.prod-top .name{font-size:26px;font-weight:700;margin-top:8px;letter-spacing:.02em}
.prod-top .cn{font-size:14px;color:rgba(243,238,227,.72);margin-top:4px}
.prod-body{padding:22px 24px;display:flex;flex-direction:column;gap:16px;flex:1}
.prod-body p{font-size:14px;color:var(--ink-70)}
.prod-spec{display:flex;flex-wrap:wrap;gap:8px}
.prod-spec span{
  font-size:12px;border:1px solid var(--line);border-radius:999px;padding:4px 11px;
  color:var(--ink-70);
}
.prod-foot{
  margin-top:auto;padding-top:16px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--ink-45);
}

/* tech list */
.tech{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:0}
.tech .item{padding:26px 26px 26px 0;border-top:1px solid var(--line)}
.tech .n{font-size:12px;letter-spacing:.2em;color:var(--clay)}
.tech h3{margin:10px 0 8px}
.tech p{font-size:14px;color:var(--ink-70)}

/* about */
.about{background:var(--ink);color:var(--bone)}
.about .eyebrow{color:var(--clay)}
.about p{color:rgba(243,238,227,.76);font-size:15px}
.about-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;align-items:start}
.creed{display:grid;gap:18px}
.creed div{border-left:2px solid rgba(243,238,227,.28);padding-left:18px}
.creed b{display:block;color:var(--bone);font-size:15px}
.creed span{font-size:14px;color:rgba(243,238,227,.66)}

/* contact */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.contact-grid .card p{margin-top:8px}
.contact-grid .val{font-size:16px;font-weight:600;color:var(--ink);word-break:break-all}
.note{
  margin-top:22px;font-size:13px;color:var(--ink-45);
  border-left:3px solid var(--clay);padding-left:14px;
}

/* footer */
footer{
  background:var(--ink);color:rgba(243,238,227,.6);
  padding:44px 0 34px;font-size:13px;
}
.foot-top{display:flex;flex-wrap:wrap;gap:22px;align-items:center;justify-content:space-between}
.foot-top img{width:190px;height:auto}
.foot-links{display:flex;flex-wrap:wrap;gap:20px}
.foot-links a:hover{color:var(--bone)}
.foot-bottom{
  margin-top:26px;padding-top:18px;border-top:1px solid rgba(243,238,227,.14);
  display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;font-size:12.5px;
}

@media(max-width:900px){
  .hero-grid,.about-grid{grid-template-columns:1fr;gap:36px}
  .hero{padding:64px 0 56px}
  .nav{display:none}
  .hero-mark img{width:min(100%,260px)}
  section{padding:58px 0}
}