:root{
  --navy:#0B2A47;
  --navy-deep:#08213A;
  --ink:#132539;
  --paper:#F6F4EF;
  --paper-2:#FFFFFF;
  --line:rgba(11,42,71,0.12);
  --blue:#0C447C;
  --teal:#1D9E75;
  --coral:#D85A30;
  --purple:#534AB7;
  --amber:#BA7517;
  --muted:#5B6B7C;
  --font-display: "Songti SC","Noto Serif SC","STSong",serif;
  --font-body: "PingFang SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --font-en: "Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit; text-decoration:none;}
.wrap{max-width:1120px; margin:0 auto; padding:0 32px;}

/* ---- nav ---- */
header{
  position:sticky; top:0; z-index:50;
  background:rgba(246,244,239,0.9);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
nav.wrap{
  display:flex; align-items:center; justify-content:space-between;
  height:76px;
}
.brand{display:flex; align-items:center; gap:10px;}
.brand svg{width:40px; height:40px; flex-shrink:0;}
.brand-text{line-height:1.2; display:flex; flex-direction:column;}
.brand-cn{order:1; font-size:19px; color:var(--navy); letter-spacing:1px;}
.brand-en{order:2; font-family:var(--font-en); font-weight:700; font-size:13px; letter-spacing:2px; color:var(--navy); margin-top:1px;}
.nav-links{display:flex; align-items:center; gap:36px; font-size:14.5px; color:var(--ink);}
.nav-links > a, .nav-item > a{position:relative; padding:4px 0;}
.nav-links > a::after, .nav-item > a::after{
  content:""; position:absolute; left:0; bottom:0; width:0; height:1.5px;
  background:var(--coral); transition:width .25s ease;
}
.nav-links > a:hover::after, .nav-item:hover > a::after{width:100%;}

/* ---- nav dropdown ---- */
.nav-item{position:relative;}
.nav-item > a{display:inline-flex; align-items:center; gap:5px;}
.caret{font-size:11px; color:var(--muted); transition:transform .25s ease;}
.nav-item:hover .caret{transform:rotate(180deg); color:var(--coral);}
.submenu{
  position:absolute; top:100%; left:0; transform:translateY(8px);
  min-width:180px; padding:8px 0; margin-top:6px;
  background:var(--paper-2); border:1px solid var(--line); border-radius:2px;
  box-shadow:0 16px 32px rgba(11,42,71,0.1);
  opacity:0; visibility:hidden; transition:opacity .2s ease, transform .2s ease;
  z-index:60;
}
.nav-item:hover .submenu{opacity:1; visibility:visible; transform:translateY(0);}
.submenu::before{
  content:""; position:absolute; bottom:100%; left:0; right:0; height:14px;
}
.submenu a{
  display:block; padding:9px 20px; font-size:14px; color:var(--ink);
  white-space:nowrap; transition:background .18s ease, color .18s ease;
}
.submenu a:hover{background:rgba(11,42,71,0.05); color:var(--coral);}

/* ---- mobile nav (hamburger) —— 桌面端隐藏，≤860px 显示 ---- */
.nav-toggle{
  display:none; width:42px; height:42px; padding:0; border:none;
  background:transparent; cursor:pointer;
  flex-direction:column; justify-content:center; align-items:center; gap:5px;
}
.nav-toggle span{
  display:block; width:24px; height:2px; border-radius:2px; background:var(--navy);
  transition:transform .25s ease, opacity .2s ease;
}
.nav-links .nav-cta-mobile{display:none;}
.btn{
  display:inline-flex; align-items:center; gap:6px;
  padding:11px 22px; border-radius:2px; font-size:14px; font-weight:600;
  cursor:pointer; border:1px solid var(--navy); transition:all .2s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--navy); color:#fff;}
.btn-primary:hover{background:var(--navy-deep);}
.btn-ghost{background:transparent; color:var(--navy);}
.btn-ghost:hover{background:rgba(11,42,71,0.06);}

/* ---- hero ---- */
.hero{
  position:relative; overflow:hidden;
  padding:100px 0 70px;
}
.hero .wrap{display:flex; flex-direction:column; align-items:center; text-align:center;}
.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-size:12.5px; letter-spacing:3px; color:var(--teal);
  font-weight:700; margin-bottom:22px;
}
.eyebrow::before{content:""; width:22px; height:1.5px; background:var(--teal); display:inline-block;}
h1.headline{
  font-family:var(--font-display);
  font-size:44px; font-weight:700; color:var(--navy-deep);
  line-height:1.45; letter-spacing:1px; margin-bottom:22px;
}
h1.headline em{
  font-style:normal;
  background:linear-gradient(90deg,var(--blue),var(--teal));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
h1.headline .hl-sm{font-size:0.8em;}
.hl-gap{display:inline-block; width:0.5em;}
.lede{font-size:16px; color:var(--muted); max-width:560px; margin:0 auto 30px;}
.hero-cta{display:flex; gap:14px; margin-bottom:44px;}

.chain{display:flex; align-items:center; justify-content:center; flex-wrap:wrap; gap:0; font-size:13px;}
.chain .node{
  padding:7px 14px; border-radius:2px; font-weight:600; white-space:nowrap;
}
.chain .arrow{color:var(--muted); padding:0 8px; font-size:13px;}
.n1{background:rgba(83,74,183,0.1); color:var(--purple);}
.n2{background:rgba(216,90,48,0.1); color:var(--coral);}
.n3{background:rgba(186,117,23,0.12); color:var(--amber);}
.n4{background:rgba(29,158,117,0.1); color:var(--teal);}
.n5{background:rgba(12,68,124,0.1); color:var(--blue);}

.hero-mark{position:relative; display:flex; align-items:center; justify-content:center;}
.hero-mark svg{width:100%; max-width:340px; height:auto;}
.mark-stroke{
  stroke-dasharray:520; stroke-dashoffset:520;
  animation:draw 2.2s ease forwards .3s;
}
@keyframes draw{to{stroke-dashoffset:0;}}
.hero-mark .ring{
  fill:none; stroke:var(--line); stroke-width:1;
}

/* ---- section shell ---- */
section{padding:76px 0;}
.section-head{max-width:600px; margin-bottom:44px;}
.kicker{font-size:12px; letter-spacing:3px; color:var(--coral); font-weight:700; margin-bottom:12px;}
h2.section-title{
  font-family:var(--font-display); font-size:28px; font-weight:700;
  color:var(--navy-deep); letter-spacing:0.5px;
}
.section-sub{color:var(--muted); font-size:15px; margin-top:10px;}

/* ---- founder ---- */
.founder{background:var(--paper-2); border-top:1px solid var(--line); border-bottom:1px solid var(--line);}
.founder .wrap{display:grid; grid-template-columns:220px 1fr; gap:48px; align-items:center;}
.avatar{
  width:180px; height:180px; border-radius:2px;
  background:linear-gradient(135deg,var(--blue),var(--teal));
  display:flex; align-items:center; justify-content:center;
  color:#fff; font-family:var(--font-display); font-size:56px; font-weight:700;
}
.founder-name{font-size:20px; font-weight:700; color:var(--navy-deep); margin-bottom:6px;}
.founder-role{font-size:13px; color:var(--teal); font-weight:600; letter-spacing:1px; margin-bottom:16px;}
.founder-bio{color:var(--muted); font-size:15px; max-width:560px; margin-bottom:18px;}
.tags{display:flex; gap:10px; flex-wrap:wrap;}
.tag{
  font-size:12px; padding:5px 12px; border:1px solid var(--line);
  color:var(--navy); border-radius:2px; font-weight:600;
}

/* ---- offerings ---- */
.cards{display:grid; grid-template-columns:repeat(3,1fr); gap:24px;}
.card{
  background:var(--paper-2); border:1px solid var(--line); border-radius:2px;
  padding:32px 26px; transition:transform .25s ease, box-shadow .25s ease;
}
.card:hover{transform:translateY(-4px); box-shadow:0 16px 32px rgba(11,42,71,0.08);}
.card-index{font-family:var(--font-en); font-size:12px; color:var(--muted); letter-spacing:1px; margin-bottom:18px;}
.card-icon{width:38px; height:38px; margin-bottom:18px;}
.card h3{font-size:17px; font-weight:700; color:var(--navy-deep); margin-bottom:10px;}
.card p{color:var(--muted); font-size:14px;}
.card-link{display:inline-block; margin-top:16px; font-size:13px; font-weight:700; color:var(--coral); border-bottom:1px solid var(--coral); padding-bottom:2px;}

/* ---- pilot cta ---- */
.pilot{background:var(--navy-deep); color:#fff;}
.pilot .wrap{display:grid; grid-template-columns:1.3fr 0.7fr; gap:40px; align-items:center;}
.pilot .kicker{color:var(--teal);}
.pilot h2{font-family:var(--font-display); font-size:26px; font-weight:700; margin-bottom:14px;}
.pilot p{color:rgba(255,255,255,0.7); font-size:15px; max-width:480px;}
.pilot .btn-primary{background:linear-gradient(90deg,var(--blue),var(--teal)); border:none;}
.pilot .btn-ghost{border-color:rgba(255,255,255,0.3); color:#fff;}
.pilot-actions{display:flex; gap:14px; justify-content:flex-end; flex-wrap:wrap;}

/* ---- footer ---- */
footer{padding:40px 0; border-top:1px solid var(--line);}
footer .wrap{display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:16px;}
.foot-links{display:flex; gap:24px; font-size:13px; color:var(--muted);}
.foot-note{font-size:12px; color:var(--muted);}

@media(max-width:860px){
  .hero .wrap{grid-template-columns:1fr; gap:36px;}
  .hero-mark{order:-1;}
  .hero-mark svg{max-width:220px;}
  h1.headline{font-size:32px;}

  /* --- 顶栏与移动端菜单 --- */
  nav.wrap{height:64px;}
  .brand svg{width:34px; height:34px;}
  .brand-cn{font-size:16px;}
  .brand-en{font-size:11px; letter-spacing:1px;}
  .nav-toggle{display:flex;}
  nav.wrap > a.btn{display:none;}            /* 顶栏 CTA 收进展开菜单 */

  .nav-links{
    position:absolute; top:100%; left:0; right:0;
    flex-direction:column; align-items:stretch; gap:0;
    background:var(--paper-2); border-bottom:1px solid var(--line);
    box-shadow:0 18px 32px rgba(11,42,71,0.12);
    padding:6px 0; display:none;
    max-height:calc(100vh - 64px); overflow-y:auto; z-index:60;
  }
  nav.wrap.nav-open .nav-links{display:flex;}
  .nav-links > a:not(.btn), .nav-item > a{padding:13px 32px; font-size:15.5px;}
  .nav-links > a:not(.btn)::after, .nav-item > a::after{display:none;}
  .nav-item{position:static;}
  .nav-item > a{justify-content:space-between;}
  .caret{display:inline-block; font-size:13px;}
  .nav-item.open > a .caret{transform:rotate(180deg); color:var(--coral);}
  .submenu{
    position:static; display:none; opacity:1; visibility:visible; transform:none;
    box-shadow:none; border:none; background:transparent;
    min-width:0; margin:0; padding:0;
  }
  .nav-item.open .submenu{display:block;}
  .submenu::before{display:none;}
  .submenu a{padding:11px 32px 11px 48px; font-size:14px; color:var(--muted); white-space:normal;}
  .nav-links .nav-cta-mobile{display:inline-flex; margin:12px 32px 10px; justify-content:center;}

  /* 汉堡 → 关闭(X) 动画 */
  nav.wrap.nav-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  nav.wrap.nav-open .nav-toggle span:nth-child(2){opacity:0;}
  nav.wrap.nav-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

  .founder .wrap{grid-template-columns:1fr; text-align:center;}
  .founder .tags, .founder-bio{margin-left:auto; margin-right:auto;}
  .avatar{margin:0 auto;}
  .cards{grid-template-columns:1fr;}
  .pilot .wrap{grid-template-columns:1fr;}
  .pilot-actions{justify-content:flex-start;}
}

@media (prefers-reduced-motion: reduce){
  .mark-stroke{animation:none; stroke-dashoffset:0;}
}

/* ---- nav active state ---- */
.nav-item.active > a{color:var(--coral);}
.nav-links > a.active{color:var(--coral);}
.submenu a.active{color:var(--coral); background:rgba(216,90,48,0.06);}

/* ---- about page ---- */
.about-section{padding:64px 0;}
.about-section + .about-section{border-top:1px solid var(--line);}
.about-founder{background:var(--paper-2); border-top:1px solid var(--line); border-bottom:1px solid var(--line);}
.about-founder .wrap{display:grid; grid-template-columns:260px 1fr; gap:56px; align-items:start;}
.about-founder .wrap + .wrap{margin-top:52px; padding-top:52px; border-top:1px solid var(--line);}
.founder-photo{
  position:relative; width:230px; height:230px; border-radius:50%; overflow:hidden;
  background:linear-gradient(135deg,var(--blue),var(--teal));
  display:flex; align-items:center; justify-content:center;
  box-shadow:0 18px 44px rgba(11,42,71,0.14); flex-shrink:0;
}
.founder-photo .photo-fallback{
  color:#fff; font-family:var(--font-display); font-size:80px; font-weight:700;
}
.founder-photo img{position:absolute; inset:0; width:100%; height:100%; object-fit:cover;}
.about-name{
  font-family:var(--font-display); font-size:30px; font-weight:700;
  color:var(--navy-deep); margin-bottom:6px;
}
.about-edu{font-size:16px; color:var(--muted); margin-bottom:24px;}
.about-lead{color:var(--muted); font-size:16px; margin-bottom:30px;}
.cred-group{margin-bottom:22px;}
.cred-group:last-child{margin-bottom:0;}
.cred-label{font-size:12px; letter-spacing:2px; color:var(--coral); font-weight:700; margin-bottom:12px;}
.about-subtitle{font-family:var(--font-display); font-size:19px; font-weight:700; color:var(--navy-deep); margin:32px 0 16px;}
.about-note{color:var(--muted); font-size:14px; margin-top:14px;}

/* 企业理念与核心价值 */
.about-philosophy{
  background:
    radial-gradient(900px 520px at 82% 8%, rgba(29,158,117,0.06), transparent 60%),
    radial-gradient(820px 560px at 8% 100%, rgba(12,68,124,0.05), transparent 60%),
    var(--paper);
  text-align:center;
}
.about-philosophy .wrap{max-width:840px;}
.about-philosophy .eyebrow{margin-bottom:20px;}
.philo-slogan{
  font-family:var(--font-display);
  font-size:40px; font-weight:700; letter-spacing:4px;
  color:var(--navy-deep); line-height:1.4; margin-bottom:34px;
}
.philo-slogan .philo-sm{font-size:0.8em;}
.philo-gap{display:inline-block; width:0.6em;}
.philo-para{
  color:var(--ink); font-size:17px; line-height:1.95; text-align:left;
  max-width:760px; margin:0 auto 18px;
}
.philo-para .key{color:var(--blue); font-weight:700;}
.philo-value{
  margin-top:40px; padding:34px 44px;
  background:var(--paper-2); border:1px solid var(--line); border-radius:18px;
  box-shadow:0 16px 44px rgba(11,42,71,0.06);
}
.philo-value-label{
  font-size:12px; letter-spacing:3px; color:var(--coral); font-weight:700; margin-bottom:16px;
}
.philo-value-main{
  font-family:var(--font-display); font-size:26px; font-weight:700;
  letter-spacing:2px; margin-bottom:14px;
  background:linear-gradient(90deg,var(--blue),var(--teal));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.philo-value-desc{color:var(--muted); font-size:16px; line-height:1.9; max-width:680px; margin:0 auto;}

@media(max-width:860px){
  .about-founder .wrap{grid-template-columns:1fr; gap:32px; justify-items:center; text-align:center;}
  .about-founder .tags{justify-content:center;}
  .about-lead{margin-left:auto; margin-right:auto;}
  .founder-photo{width:190px; height:190px;}
  .philo-slogan{font-size:30px; letter-spacing:2px;}
  .philo-value{padding:26px 22px;}
  .philo-value-main{font-size:22px;}
}

/* ---- contact page ---- */
.contact-section{padding:60px 0 76px;}
.contact-grid{display:grid; grid-template-columns:repeat(auto-fit, minmax(210px,1fr)); gap:24px; align-items:stretch;}
.contact-card{
  background:var(--paper-2); border:1px solid var(--line); border-radius:4px;
  padding:38px 28px; text-align:center;
  display:flex; flex-direction:column; justify-content:flex-start;
  transition:transform .25s ease, box-shadow .25s ease;
}
.contact-card:hover{transform:translateY(-4px); box-shadow:0 16px 32px rgba(11,42,71,0.08);}
.contact-card .c-icon{width:42px; height:42px; margin:0 auto 18px; color:var(--blue);}
.contact-card h3{font-size:16px; font-weight:700; color:var(--navy-deep); margin-bottom:12px;}
.contact-card .c-value{
  display:inline-block; font-size:18px; font-weight:700; color:var(--blue);
  word-break:break-all; letter-spacing:0.5px;
}
a.c-value:hover{color:var(--coral);}
.c-value.c-email{font-size:15px; letter-spacing:0;}
.contact-card .c-note{font-size:13px; color:var(--muted); margin-top:8px;}
.contact-qr{
  width:158px; height:158px; margin:0 auto 12px;
  border:1px solid var(--line); border-radius:8px; overflow:hidden;
  background:var(--paper); display:flex; align-items:center; justify-content:center;
}
.contact-qr img{width:100%; height:100%; object-fit:contain;}
.contact-qr .qr-fallback{display:none; font-size:12px; color:var(--muted); padding:12px; line-height:1.6; text-align:center;}
@media(max-width:860px){
  .contact-grid{grid-template-columns:1fr; max-width:360px; margin:0 auto;}
}

/* ---- clients logo wall ---- */
.clients{
  background:var(--paper-2);
  border-top:1px solid var(--line); border-bottom:1px solid var(--line);
  padding:66px 0; overflow:hidden;
}
.clients .section-head{max-width:none; text-align:center; margin:0 auto 40px;}
.marquee{
  display:flex; flex-direction:column; gap:22px;
  position:relative;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);
          mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);
}
.marquee-row{display:flex; gap:22px; width:max-content; will-change:transform;}
.marquee-row.row-1{animation:marquee-left 46s linear infinite;}
.marquee-row.row-2{animation:marquee-right 52s linear infinite;}
.clients:hover .marquee-row{animation-play-state:paused;}
@keyframes marquee-left{from{transform:translateX(0);} to{transform:translateX(-50%);}}
@keyframes marquee-right{from{transform:translateX(-50%);} to{transform:translateX(0);}}
.logo-chip{
  flex:0 0 auto; height:100px; min-width:230px; padding:0 34px;
  display:flex; align-items:center; justify-content:center; gap:10px;
  background:var(--paper); border:1px solid var(--line); border-radius:4px;
  color:var(--navy); font-weight:700; font-size:15.5px; letter-spacing:0.5px;
  white-space:nowrap;
  transition:border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}
.logo-chip:hover{
  border-color:rgba(12,68,124,0.35);
  box-shadow:0 10px 24px rgba(11,42,71,0.08); transform:translateY(-2px);
}
.logo-chip img{max-height:80px; width:auto; display:block;}

@media(max-width:860px){
  .clients{padding:48px 0;}
  .logo-chip{height:82px; min-width:180px; padding:0 24px; font-size:14px;}
  .logo-chip img{max-height:64px;}
}
@media (prefers-reduced-motion: reduce){
  .marquee-row{animation:none;}
  .marquee{overflow-x:auto;}
}

/* ---- subpage hero ---- */
.subhero{
  background:var(--paper-2);
  border-bottom:1px solid var(--line);
  padding:52px 0 46px;
}
.breadcrumb{
  display:flex; align-items:center; flex-wrap:wrap; gap:8px;
  font-size:13px; color:var(--muted); margin-bottom:22px;
}
.breadcrumb a:hover{color:var(--coral);}
.breadcrumb .sep{color:var(--line);}
.breadcrumb .current{color:var(--ink);}
.subhero h1{
  font-family:var(--font-display); font-size:34px; font-weight:700;
  color:var(--navy-deep); letter-spacing:0.5px; margin-bottom:16px;
}
.subhero .sub-desc{color:var(--muted); font-size:16px;}

/* ---- subpage service list ---- */
.services-detail{padding:60px 0;}
.service-block{
  display:grid; grid-template-columns:60px 1fr; gap:28px;
  padding:38px 0; border-top:1px solid var(--line);
}
.service-block:first-child{border-top:none; padding-top:0;}
.service-no{
  font-family:var(--font-en); font-size:20px; font-weight:700; color:var(--blue);
  letter-spacing:1px;
}
.service-block h3{font-size:20px; font-weight:700; color:var(--navy-deep); margin-bottom:12px;}
.service-block .desc{color:var(--muted); font-size:15px; margin-bottom:20px;}
.service-list{display:grid; grid-template-columns:repeat(2,1fr); gap:11px 30px;}
.service-list li{
  list-style:none; position:relative; padding-left:20px;
  font-size:14px; color:var(--ink);
}
.service-list li::before{
  content:""; position:absolute; left:0; top:9px; width:6px; height:6px;
  border-radius:50%; background:var(--teal);
}

@media(max-width:860px){
  .subhero h1{font-size:26px;}
  .service-block{grid-template-columns:1fr; gap:12px;}
  .service-list{grid-template-columns:1fr;}
}