/* ============================================================
   PANETHOS 磐信智策 — Prototype Site Styles
   Brand: deep red #A4161A · charcoal · neutral grays
   ============================================================ */

:root{
  --brand:#A4161A;
  --brand-dark:#7B1113;
  --brand-soft:#F4E7E7;
  --ink:#1A1A1A;
  --charcoal:#2B2B2D;
  --gray-700:#3F4145;
  --gray-500:#6B6E73;
  --gray-400:#9AA0A6;
  --gray-200:#E4E6E9;
  --gray-100:#F1F2F3;
  --paper:#FBFAF8;
  --white:#FFFFFF;
  --maxw:1180px;
  --radius:4px;
  --shadow:0 1px 3px rgba(20,20,20,.06),0 8px 28px rgba(20,20,20,.06);
  --serif:"Noto Serif SC","Songti SC",Georgia,"Times New Roman",serif;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  color:var(--ink);
  background:var(--white);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;line-height:1.3;color:var(--ink)}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- Top utility bar ---------- */
.topbar{background:var(--charcoal);color:var(--gray-200);font-size:13px}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar a{color:var(--gray-200);opacity:.85}
.topbar a:hover{opacity:1;color:#fff}
.topbar .meta span{margin-right:18px}
.topbar .lang a{margin-left:14px;opacity:.7}
.topbar .lang a.active{opacity:1;color:#fff;font-weight:600}

/* ---------- Header / Nav ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--gray-200)}
.nav{display:flex;align-items:center;justify-content:space-between;height:76px}
.brand{display:flex;align-items:center;gap:13px}
.brand img{height:44px;width:auto}
.brand .wordmark{display:flex;flex-direction:column;line-height:1.15}
.brand .cn{font-family:var(--serif);font-size:21px;font-weight:700;letter-spacing:2px;color:var(--ink)}
.brand .en{font-size:11px;letter-spacing:3px;color:var(--gray-500);text-transform:uppercase}
.menu{display:flex;align-items:center;gap:6px}
.menu a{padding:10px 16px;font-size:15px;color:var(--gray-700);border-radius:var(--radius);position:relative;transition:color .2s}
.menu a:hover{color:var(--brand)}
.menu a.active{color:var(--brand);font-weight:600}
.menu a.active::after{content:"";position:absolute;left:16px;right:16px;bottom:2px;height:2px;background:var(--brand)}
.nav-cta{background:var(--brand);color:#fff !important;padding:10px 20px !important;border-radius:var(--radius);font-weight:500}
.nav-cta:hover{background:var(--brand-dark)}
.burger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.burger span{width:24px;height:2px;background:var(--ink);transition:.3s}

/* ---------- Hero ---------- */
.hero{position:relative;background:linear-gradient(120deg,#1A1A1A 0%,#2B2B2D 55%,#3a1416 100%);color:#fff;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background:
  radial-gradient(circle at 82% 18%,rgba(164,22,26,.32),transparent 42%),
  url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60'%3E%3Cpath d='M0 59h60M59 0v60' stroke='%23ffffff' stroke-opacity='0.04' stroke-width='1'/%3E%3C/svg%3E");
  pointer-events:none}
.hero .container{position:relative;z-index:2;padding:108px 24px 116px}
.hero .eyebrow{display:inline-block;font-size:13px;letter-spacing:3px;text-transform:uppercase;color:var(--brand);border-left:3px solid var(--brand);padding-left:12px;margin-bottom:26px}
.hero h1{font-size:46px;color:#fff;line-height:1.32;max-width:18em;letter-spacing:1px}
.hero h1 .accent{color:#fff;border-bottom:3px solid var(--brand)}
.hero p.lead{margin-top:26px;font-size:18px;color:rgba(255,255,255,.82);max-width:40em;line-height:1.9}
.hero .actions{margin-top:40px;display:flex;gap:16px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 30px;border-radius:var(--radius);font-size:15px;font-weight:500;transition:.2s;cursor:pointer;border:1px solid transparent}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark)}
.btn-ghost{border-color:rgba(255,255,255,.4);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.1);border-color:#fff}
.btn-outline{border-color:var(--brand);color:var(--brand)}
.btn-outline:hover{background:var(--brand);color:#fff}

/* ---------- Stat strip ---------- */
.stats{background:var(--paper);border-bottom:1px solid var(--gray-200)}
.stats .grid{display:grid;grid-template-columns:repeat(4,1fr);text-align:center}
.stat{padding:40px 16px;border-right:1px solid var(--gray-200)}
.stat:last-child{border-right:none}
.stat .num{font-family:var(--serif);font-size:38px;font-weight:700;color:var(--brand)}
.stat .label{margin-top:6px;font-size:14px;color:var(--gray-500)}

/* ---------- Section scaffolding ---------- */
.section{padding:88px 0}
.section.alt{background:var(--paper)}
.section-head{max-width:760px;margin-bottom:52px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head .kicker{font-size:13px;letter-spacing:3px;text-transform:uppercase;color:var(--brand);font-weight:600;margin-bottom:14px}
.section-head h2{font-size:33px;letter-spacing:1px}
.section-head p{margin-top:16px;color:var(--gray-500);font-size:16px;line-height:1.9}

/* ---------- Services grid ---------- */
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--gray-200);border:1px solid var(--gray-200)}
.svc-card{background:#fff;padding:38px 32px;transition:.25s;position:relative}
.svc-card:hover{background:var(--white);box-shadow:var(--shadow);z-index:2;transform:translateY(-3px)}
.svc-card .ico{width:46px;height:46px;color:var(--brand);margin-bottom:20px}
.svc-card h3{font-size:19px;margin-bottom:10px}
.svc-card p{color:var(--gray-500);font-size:14.5px;line-height:1.8}
.svc-card .more{display:inline-block;margin-top:16px;font-size:13px;color:var(--brand);font-weight:600;letter-spacing:.5px}

/* ---------- Feature / why-us ---------- */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center}
.feature-list{list-style:none;margin-top:24px}
.feature-list li{padding:20px 0;border-top:1px solid var(--gray-200);display:flex;gap:18px}
.feature-list li:last-child{border-bottom:1px solid var(--gray-200)}
.feature-list .n{font-family:var(--serif);font-size:22px;font-weight:700;color:var(--brand);min-width:42px}
.feature-list h4{font-size:17px;margin-bottom:4px}
.feature-list p{color:var(--gray-500);font-size:14.5px}
.media-card{background:linear-gradient(150deg,#2B2B2D,#3a1416);border-radius:var(--radius);padding:48px;color:#fff;box-shadow:var(--shadow)}
.media-card blockquote{font-family:var(--serif);font-size:21px;line-height:1.7;color:#fff}
.media-card .by{margin-top:24px;color:var(--brand-soft);font-size:14px}
.media-card .by strong{display:block;color:#fff;font-size:16px;font-family:var(--serif)}

/* ---------- Approach steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step{padding:30px 26px;border:1px solid var(--gray-200);border-radius:var(--radius);background:#fff;position:relative}
.step .badge{font-family:var(--serif);font-size:15px;color:#fff;background:var(--brand);width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.step h4{font-size:17px;margin-bottom:8px}
.step p{font-size:14px;color:var(--gray-500)}

/* ---------- CTA band ---------- */
.cta-band{background:var(--brand);color:#fff;padding:64px 0}
.cta-band .container{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-band h2{color:#fff;font-size:28px}
.cta-band p{color:rgba(255,255,255,.85);margin-top:8px}
.cta-band .btn-white{background:#fff;color:var(--brand)}
.cta-band .btn-white:hover{background:var(--ink);color:#fff}

/* ---------- About page ---------- */
.page-hero{background:linear-gradient(120deg,#1A1A1A,#2B2B2D);color:#fff;padding:78px 0 64px;position:relative}
.page-hero .crumb{font-size:13px;color:var(--gray-400);margin-bottom:14px;letter-spacing:1px}
.page-hero h1{font-size:38px;color:#fff}
.page-hero p{margin-top:14px;color:rgba(255,255,255,.78);max-width:48em}
.info-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--gray-200);border:1px solid var(--gray-200)}
.info-grid .row{background:#fff;padding:22px 26px}
.info-grid .row .k{font-size:13px;color:var(--gray-400);letter-spacing:1px;margin-bottom:6px}
.info-grid .row .v{font-size:15.5px;color:var(--ink)}
.scope-box{background:var(--paper);border-left:3px solid var(--brand);padding:26px 30px;border-radius:0 var(--radius) var(--radius) 0;color:var(--gray-700);line-height:2}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.tag{background:var(--brand-soft);color:var(--brand-dark);padding:6px 14px;border-radius:30px;font-size:13px;font-weight:500}

/* ---------- Leadership ---------- */
.leader{display:grid;grid-template-columns:300px 1fr;gap:48px;align-items:start}
.leader .avatar{background:linear-gradient(150deg,#2B2B2D,#3a1416);border-radius:var(--radius);aspect-ratio:3/4;display:flex;align-items:flex-end;justify-content:center;color:#fff;position:relative;overflow:hidden}
.leader .avatar .mono{font-family:var(--serif);font-size:120px;font-weight:700;color:rgba(255,255,255,.08);position:absolute;top:50%;left:50%;transform:translate(-50%,-55%)}
.leader .avatar .cap{position:relative;z-index:2;background:rgba(0,0,0,.35);width:100%;padding:18px;text-align:center}
.leader .avatar .cap strong{display:block;font-family:var(--serif);font-size:20px}
.leader .avatar .cap span{font-size:13px;color:var(--brand-soft)}
.leader h3{font-size:24px;margin-bottom:6px}
.leader .role{color:var(--brand);font-weight:600;margin-bottom:18px}
.leader p{color:var(--gray-700);margin-bottom:14px}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px}
.contact-info .item{display:flex;gap:16px;padding:20px 0;border-bottom:1px solid var(--gray-200)}
.contact-info .item .ico{width:38px;height:38px;color:var(--brand);flex-shrink:0}
.contact-info .item .k{font-size:13px;color:var(--gray-400);letter-spacing:1px}
.contact-info .item .v{font-size:16px;color:var(--ink)}
.form-card{background:#fff;border:1px solid var(--gray-200);border-radius:var(--radius);padding:36px;box-shadow:var(--shadow)}
.form-row{margin-bottom:18px}
.form-row label{display:block;font-size:14px;color:var(--gray-700);margin-bottom:7px}
.form-row input,.form-row textarea,.form-row select{width:100%;padding:12px 14px;border:1px solid var(--gray-200);border-radius:var(--radius);font-family:inherit;font-size:15px;background:var(--paper);transition:.2s}
.form-row input:focus,.form-row textarea:focus,.form-row select:focus{outline:none;border-color:var(--brand);background:#fff}
.form-note{font-size:12.5px;color:var(--gray-400);margin-top:6px}
.map-embed{margin-top:30px;border:1px solid var(--gray-200);border-radius:var(--radius);overflow:hidden;height:240px;background:var(--gray-100) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40'%3E%3Cpath d='M0 39h40M39 0v40' stroke='%23d8dadd' stroke-width='1'/%3E%3C/svg%3E");display:flex;align-items:center;justify-content:center;color:var(--gray-400);font-size:14px}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:var(--gray-400);padding:64px 0 0;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.site-footer .brand .cn{color:#fff}
.site-footer .brand .en{color:var(--gray-500)}
.site-footer .ft-about{margin-top:18px;line-height:1.9;color:var(--gray-400);max-width:24em}
.site-footer h5{color:#fff;font-family:var(--sans);font-size:15px;margin-bottom:18px;letter-spacing:1px}
.site-footer ul{list-style:none}
.site-footer ul li{margin-bottom:11px}
.site-footer ul a:hover{color:#fff}
.site-footer .contact-line{margin-bottom:11px;line-height:1.7}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:22px 0;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13px;color:var(--gray-500)}
.footer-bottom a:hover{color:#fff}

/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media(max-width:960px){
  .split,.contact-grid,.leader{grid-template-columns:1fr;gap:36px}
  .svc-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .stats .grid{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2){border-right:none}
  .leader{}
  .leader .avatar{max-width:300px}
}
@media(max-width:680px){
  .menu{position:fixed;top:114px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:12px 24px;border-bottom:1px solid var(--gray-200);box-shadow:var(--shadow);transform:translateY(-150%);transition:transform .3s;gap:0}
  .menu.open{transform:none}
  .menu a{padding:14px 4px;border-bottom:1px solid var(--gray-100)}
  .menu a.active::after{display:none}
  .burger{display:flex}
  .hero h1{font-size:32px}
  .hero .container{padding:72px 24px}
  .section{padding:60px 0}
  .svc-grid{grid-template-columns:1fr}
  .info-grid,.steps{grid-template-columns:1fr}
  .topbar .meta{display:none}
  .section-head h2{font-size:27px}
}