:root{
    --brand:#1F4E79;--brand-dark:#16395C;--brand-deep:#0E2940;--accent:#E67E22;--accent-hover:#D9720F;
    --text:#243447;--muted:#5B6B7B;--bg:#FFFFFF;--bg-soft:#F4F7FB;--border:#E3EAF2;
    --grad:linear-gradient(135deg,#1F4E79 0%,#2C6E9E 55%,#3E8BB5 100%);
    --radius:16px;--shadow:0 10px 30px rgba(31,78,121,.10);--shadow-lg:0 20px 50px rgba(31,78,121,.16);
    --font:"Microsoft YaHei","PingFang SC","Hiragino Sans GB",sans-serif;
  }
html{scroll-behavior:smooth;}
img{max-width:100%;display:block;}
body{font-family:var(--font);color:var(--text);background:var(--bg);margin:0;}
section{padding:88px 0;}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:12px 26px;border-radius:999px;font-size:15px;font-weight:700;cursor:pointer;border:2px solid transparent;transition:all .25s;text-decoration:none;}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 8px 20px rgba(230,126,34,.28);}
.btn-primary:hover{background:var(--accent-hover);}
.btn-outline{border-color:var(--border);color:var(--brand);background:#fff;}
.btn-outline:hover{border-color:var(--brand);}
.btn-ghost-white{border-color:rgba(255,255,255,.6);color:#fff;}
.btn-ghost-white:hover{background:rgba(255,255,255,.14);}
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease;}
.visible{opacity:1;transform:none;}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px;}
.logo{display:flex;align-items:center;gap:10px;font-size:21px;font-weight:800;color:var(--brand-deep);text-decoration:none;}
.logo-img{width:36px;height:36px;object-fit:contain;border-radius:50%;display:block;flex-shrink:0;}
.nav-links{display:flex;gap:28px;font-size:15px;color:var(--text);font-weight:500;}
.nav-links a{position:relative;padding:4px 0;color:var(--text);text-decoration:none;}
.nav-links a.active{color:var(--brand);font-weight:700;}
.nav-links a.active::after{content:'';position:absolute;left:0;bottom:-2px;width:100%;height:2px;background:var(--accent);}
.nav-links a:hover{color:var(--brand);}
.nav-cta{display:flex;align-items:center;gap:14px;}
.nav-cta .btn{padding:10px 20px;font-size:14px;}
.burger{display:none;background:none;border:none;cursor:pointer;width:40px;height:40px;flex-direction:column;align-items:center;justify-content:center;gap:5px;}
.burger span{display:block;width:22px;height:2px;background:var(--brand-deep);}
.mobile-menu{display:none;flex-direction:column;background:#fff;padding:18px 24px 26px;border-top:1px solid var(--border);gap:4px;}
.mobile-menu a{padding:12px 4px;font-size:16px;color:var(--text);border-bottom:1px solid var(--border);text-decoration:none;}
.mobile-menu a:last-child{border:none;}
.menu-open .mobile-menu{display:flex;}
.hero{background:var(--grad);color:#fff;padding:84px 0;overflow:hidden;position:relative;}
.hero:after{content:'';position:absolute;right:-80px;top:-80px;width:340px;height:340px;border-radius:50%;background:rgba(255,255,255,.06);}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:center;}
.hero-badge{display:inline-flex;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);padding:7px 14px;border-radius:999px;font-size:13px;margin-bottom:20px;}
.hero h1{font-size:40px;line-height:1.3;font-weight:800;margin:0;}
.hero h1 .hl{color:#FFC78C;}
.hero-sub{color:rgba(255,255,255,.9);margin-top:18px;font-size:16px;max-width:520px;line-height:1.9;}
.hero-metrics{display:flex;gap:26px;margin-top:28px;}
.hm .n{font-size:24px;font-weight:800;color:#FFC78C;}
.hm .l{font-size:13px;color:rgba(255,255,255,.75);}
.hero-cta{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap;}
.panel{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.2);border-radius:18px;padding:24px;backdrop-filter:blur(4px);}
.panel .pt{font-size:13px;color:#FFC78C;font-weight:700;margin-bottom:14px;letter-spacing:1px;}
.ptool{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px dashed rgba(255,255,255,.18);font-size:14px;}
.ptool:last-child{border:none;}
.ptool .ic{width:34px;height:34px;border-radius:9px;background:rgba(255,255,255,.12);display:flex;align-items:center;justify-content:center;font-weight:900;flex-shrink:0;}
.ptool b{color:#fff;display:block;font-size:14px;}
.ptool span{font-size:12px;color:rgba(255,255,255,.7);}
.ptool .st{color:#FFC78C;margin-left:auto;font-size:12px;font-weight:700;}
.section-head{text-align:center;max-width:820px;margin:0 auto 52px;}
.section-head .tag{display:inline-block;background:rgba(31,78,121,.08);color:var(--brand);font-size:13px;font-weight:600;padding:6px 16px;border-radius:999px;margin-bottom:16px;letter-spacing:1px;}
.section-head h2{font-size:34px;font-weight:800;color:var(--brand-deep);margin:0;}
.section-head p{color:var(--muted);margin-top:12px;font-size:15px;}
.soft-sec{background:var(--bg-soft);}
footer{background:var(--brand-deep);color:rgba(255,255,255,.82);padding:56px 0 28px;}
.foot-grid{display:grid;grid-template-columns:2.3fr 1fr 1fr 1.1fr;gap:40px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.12);}
.foot-brand p{font-size:16px;color:rgba(255,255,255,.65);margin-top:16px;max-width:380px;line-height:1.8;}
.foot-col h4{color:#fff;font-size:16px;font-weight:700;margin-bottom:16px;}
.foot-col a{display:block;font-size:14px;color:rgba(255,255,255,.7);margin-bottom:11px;text-decoration:none;}
.foot-col a:hover{color:#fff;}
.foot-qr{display:flex;gap:12px;margin-bottom:14px;}
.foot-qr a{display:flex;flex-direction:column;align-items:center;gap:6px;color:rgba(255,255,255,.92);font-size:12px;text-decoration:none;}
.foot-qr .foot-qr-img{width:64px;height:64px;border-radius:8px;object-fit:cover;background:#fff;border:2px solid rgba(255,255,255,.18);}
.foot-contact .c{margin-bottom:14px;font-size:14px;}
.foot-contact .c b{color:#fff;font-size:15px;display:block;margin-top:3px;font-weight:800;}
.foot-bottom{text-align:center;font-size:13px;color:rgba(255,255,255,.5);padding-top:22px;}
.foot-bottom a{color:rgba(255,255,255,.6);text-decoration:none;}
.float-contact{position:fixed;right:18px;top:50%;transform:translateY(-50%);z-index:200;display:flex;flex-direction:column;gap:26px;align-items:end;}
.float-contact a{display:flex;flex-direction:column;align-items:center;gap:8px;padding:4px;text-decoration:none;transition:transform .3s ease;}
.float-contact a:hover{transform:translateY(-4px);}
.float-contact .fc-icon{display:flex;align-items:center;justify-content:center;font-size:46px;line-height:1;filter:drop-shadow(0 6px 14px rgba(0,0,0,.22));}
.float-contact .fc-icon img{width:54px;height:54px;object-fit:contain;display:block;}
.float-contact .fc-txt{font-size:12px;font-weight:700;letter-spacing:.5px;padding:4px 12px;border-radius:999px;background:rgba(255,255,255,.9);box-shadow:0 3px 10px rgba(0,0,0,.1);}
.float-contact .fc-tel .fc-txt{color:#E67E22;}
.float-contact .fc-chat .fc-txt{color:#07C160;}
@media(max-width:768px){.float-contact{right:12px;top:auto;bottom:20px;transform:none;align-items:center;gap:20px;}.float-contact .fc-icon{font-size:38px;}.float-contact .fc-icon img{width:46px;height:46px;}.float-contact .fc-txt{font-size:11px;padding:3px 10px;}}
@media(max-width:960px){
  .nav-links,.nav-cta .btn-outline{display:none;}
  .burger{display:flex;}
  .hero-inner{grid-template-columns:1fr;}
  .foot-grid{grid-template-columns:1fr 1fr;}
}
@media(max-width:768px){
  section{padding:64px 0;}
  .section-head h2{font-size:27px;}
  .hero h1{font-size:30px;}
  .hero{padding:60px 0;}
  .hero-inner{padding-left:8px;padding-right:8px;}
  .nav .logo{font-size:15px;gap:6px;white-space:nowrap;flex-shrink:0;min-width:0;}
  .nav .nav-cta{flex-shrink:0;gap:8px;}
  .nav .nav-cta .btn{white-space:nowrap;font-size:12px;padding:8px 10px;}
  .foot-grid{grid-template-columns:1fr;}
}

/* ===== about 页专属 ===== */
/* 四块业务卡片（复用工具卡体系，2x2） */
.biz-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.biz-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow);transition:all .3s;display:flex;flex-direction:column;}
.biz-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:#CFE0F0;}
.biz-card .bic{width:56px;height:56px;border-radius:14px;background:rgba(31,78,121,.08);display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:16px;}
.biz-card .bhead{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;}
.biz-card h3{font-size:20px;color:var(--brand-deep);font-weight:800;margin:0;}
.biz-card .bsub{font-size:13px;color:var(--accent);font-weight:700;}
.biz-card p{font-size:14.5px;line-height:1.85;color:var(--text);margin:12px 0 14px;flex:1;}
.biz-card ul{list-style:none;display:flex;flex-direction:column;gap:8px;padding:0;margin:0 0 16px;}
.biz-card li{font-size:14px;color:var(--text);display:flex;gap:8px;align-items:flex-start;}
.biz-card li::before{content:"▸";color:var(--accent);font-weight:900;flex-shrink:0;}
.biz-card .blink{font-weight:700;color:var(--brand);font-size:14px;text-decoration:none;}
.biz-card .blink:hover{color:var(--accent);}
/* 时间线 */
.timeline{max-width:860px;margin:0 auto;position:relative;padding-left:30px;}
.timeline::before{content:"";position:absolute;left:8px;top:8px;bottom:8px;width:2px;background:#CFE0F0;}
.tl-item{position:relative;padding:0 0 30px 22px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{content:"";position:absolute;left:-28px;top:5px;width:14px;height:14px;border-radius:50%;background:var(--accent);border:3px solid #fff;box-shadow:0 0 0 2px var(--accent);}
.tl-item .ty{display:inline-block;font-size:13px;font-weight:800;color:var(--brand);background:rgba(31,78,121,.08);border-radius:999px;padding:3px 12px;margin-bottom:8px;}
.tl-item h4{font-size:17px;color:var(--brand-deep);font-weight:800;margin:0 0 6px;}
.tl-item p{font-size:14.5px;line-height:1.85;color:var(--text);margin:0;max-width:720px;}
/* 为什么是我们 */
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.why-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow);}
.why-card .wic{font-size:30px;margin-bottom:14px;}
.why-card h3{font-size:18px;color:var(--brand-deep);font-weight:800;margin:0 0 10px;}
.why-card p{font-size:14.5px;line-height:1.9;color:var(--text);margin:0;}
/* 创始人 */
.fdr{background:var(--grad);color:#fff;}
.fdr-wrap{display:grid;grid-template-columns:1.2fr .8fr;gap:52px;align-items:center;}
.fdr .tag{display:inline-block;background:rgba(255,255,255,.16);color:#fff;font-size:13px;font-weight:600;padding:6px 16px;border-radius:999px;margin-bottom:16px;letter-spacing:1px;}
.fdr h2{font-size:30px;font-weight:800;margin:0 0 18px;color:#fff;line-height:1.4;}
.fdr-quote{font-size:16.5px;line-height:1.95;color:rgba(255,255,255,.92);margin:0 0 22px;}
.fdr-points{display:flex;flex-direction:column;gap:10px;}
.fdr-points span{font-size:14.5px;color:rgba(255,255,255,.95);}
.fdr-points span::before{content:"✓ ";color:#FFC78C;font-weight:900;}
.fdr-visual{text-align:center;}
.fdr-photo{position:relative;display:inline-block;}
.fdr-photo img{width:230px;height:230px;border-radius:50%;object-fit:cover;border:5px solid rgba(255,255,255,.35);box-shadow:0 20px 46px rgba(0,0,0,.28);display:block;}
.fdr-badge{background:#fff;color:var(--brand);font-size:13px;font-weight:800;padding:7px 18px;border-radius:999px;display:inline-block;margin-top:16px;box-shadow:0 8px 20px rgba(0,0,0,.18);}
.fdr-note{font-size:12.5px;color:rgba(255,255,255,.65);margin-top:14px;}
/* 核实三步 */
.verify-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.verify-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);text-align:center;}
.verify-card .vn{width:44px;height:44px;margin:0 auto 14px;border-radius:50%;background:var(--grad);color:#fff;font-weight:900;font-size:18px;display:flex;align-items:center;justify-content:center;}
.verify-card h3{font-size:17px;color:var(--brand-deep);font-weight:800;margin:0 0 10px;}
.verify-card p{font-size:14px;line-height:1.85;color:var(--muted);margin:0;}
@media(max-width:960px){.biz-grid,.why-grid,.verify-grid{grid-template-columns:1fr 1fr;}.fdr-wrap{grid-template-columns:1fr;}}
@media(max-width:768px){.biz-grid,.why-grid,.verify-grid{grid-template-columns:1fr;}}