/* 青桠科技官网 - 共享样式 */
:root{
  --p:#0D9488;--pl:#14B8A6;--pd:#0F766E;--p-dark:#0D6B63;
  --a:#F59E0B;--al:#FBBF24;
  --s:#10B981;
  --bg:#F8FAFC;--bg2:#F1F5F9;
  --t:#0F172A;--t2:#334155;--ts:#64748B;
  --b:#E2E8F0;
  --nav-h:72px;
  --r:16px;--rs:10px;
  --sh:0 1px 3px rgba(0,0,0,.06),0 1px 2px rgba(0,0,0,.04);
  --sh-md:0 4px 12px rgba(0,0,0,.08);
  --sh-lg:0 12px 40px rgba(0,0,0,.1);
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;background:#fff;color:var(--t);line-height:1.6;overflow-x:hidden;-webkit-font-smoothing:antialiased}

.container{max-width:1200px;margin:0 auto;padding:0 32px}

/* Nav */
nav{position:fixed;top:0;left:0;right:0;height:var(--nav-h);background:rgba(255,255,255,.92);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--b);z-index:1000;display:flex;align-items:center}
nav .container{display:flex;align-items:center;justify-content:space-between;width:100%}
.nav-logo{display:flex;align-items:center;gap:10px;text-decoration:none}
.nav-logo .logo-icon{width:36px;height:36px;background:linear-gradient(135deg,var(--p),var(--pd));border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:18px}
.nav-logo .logo-text{font-size:17px;font-weight:700;color:var(--t)}
.nav-logo .logo-sub{font-size:11px;color:var(--ts);font-weight:400;margin-left:8px;padding-left:8px;border-left:1px solid var(--b)}
.nav-links{display:flex;gap:4px;list-style:none;align-items:center}
.nav-links a{text-decoration:none;color:var(--t2);font-size:14px;font-weight:500;padding:8px 16px;border-radius:8px;transition:all .2s}
.nav-links a:hover{background:var(--bg2);color:var(--p)}
.nav-links a.active{background:#F0FDFA;color:var(--p);font-weight:600}
.nav-cta{padding:8px 20px!important;background:var(--p)!important;color:#fff!important;font-weight:600!important;border-radius:8px!important}
.nav-cta:hover{background:var(--pd)!important;color:#fff!important;transform:translateY(-1px);box-shadow:0 4px 12px rgba(13,148,136,.3)}
.nav-toggle{display:none;background:none;border:none;font-size:24px;cursor:pointer;color:var(--t);padding:8px}

/* Page Header */
.page-header{padding:120px 0 60px;text-align:center}
.page-header.dark{background:linear-gradient(180deg,#042F2E 0%,#0F4A47 50%,#115E56 100%);color:#fff}
.page-header .badge{display:inline-block;padding:4px 16px;background:rgba(13,148,136,.15);color:var(--p);border-radius:20px;font-size:12px;font-weight:700;letter-spacing:1px;text-transform:uppercase;margin-bottom:16px}
.page-header.dark .badge{background:rgba(255,255,255,.12);color:rgba(255,255,255,.85)}
.page-header h1{font-size:48px;font-weight:800;line-height:1.2;margin-bottom:16px;letter-spacing:-.5px}
.page-header .sub{font-size:18px;color:var(--ts);max-width:600px;margin:0 auto}
.page-header.dark .sub{color:rgba(255,255,255,.7)}

/* Section */
.section{padding:80px 0}
.section .label{display:inline-block;font-size:12px;font-weight:700;color:var(--p);letter-spacing:1px;text-transform:uppercase;margin-bottom:12px}
.section h2{font-size:36px;font-weight:800;margin-bottom:12px;letter-spacing:-.5px;line-height:1.3}
.section .desc{font-size:16px;color:var(--ts);margin-bottom:40px;max-width:600px}
.section.alt{background:var(--bg)}
.section.dark{background:#042F2E;color:#fff}
.section.dark .desc{color:rgba(255,255,255,.65)}
.section.dark h2{color:#fff}
.section.dark .label{color:var(--pl)}

/* Cards */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:20px}
.card{background:#fff;border-radius:var(--r);padding:28px;border:1px solid var(--b);transition:all .25s}
.card:hover{border-color:var(--p);box-shadow:var(--sh-md);transform:translateY(-2px)}
.card .card-icon{font-size:32px;margin-bottom:12px}
.card h4{font-size:18px;margin-bottom:8px}
.card p{font-size:14px;color:var(--ts);line-height:1.6}
.dark .card{background:rgba(255,255,255,.04);border-color:rgba(255,255,255,.08)}
.dark .card:hover{border-color:var(--p);background:rgba(255,255,255,.07)}
.dark .card h4{color:#fff}
.dark .card p{color:rgba(255,255,255,.6)}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:var(--rs);font-size:14px;font-weight:600;cursor:pointer;text-decoration:none;transition:all .2s;border:none}
.btn-primary{background:var(--p);color:#fff}
.btn-primary:hover{background:var(--pd);transform:translateY(-1px);box-shadow:0 6px 20px rgba(13,148,136,.35)}
.btn-outline{border:2px solid var(--b);color:var(--t);background:#fff}
.btn-outline:hover{border-color:var(--p);color:var(--p)}
.btn-ghost{background:transparent;color:var(--p);padding:8px 16px}
.btn-ghost:hover{background:#F0FDFA}

/* Tables */
.table-wrap{overflow-x:auto;margin:16px 0;border-radius:var(--rs);border:1px solid var(--b)}
table{width:100%;border-collapse:collapse;font-size:13px}
th{background:var(--bg2);color:var(--t2);font-weight:700;text-align:left;padding:12px 16px;border-bottom:2px solid var(--b);font-size:11px;text-transform:uppercase;letter-spacing:.5px}
td{padding:12px 16px;border-bottom:1px solid var(--b);vertical-align:top;font-size:13px;line-height:1.6}
tr:last-child td{border-bottom:none}

/* Features */
.features{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.feature{text-align:center;padding:28px 20px}
.feature .f-icon{font-size:36px;margin-bottom:12px}
.feature h4{font-size:16px;margin-bottom:6px}
.feature p{font-size:13px;color:var(--ts);line-height:1.5}

/* Tabs */
.tabs{display:flex;gap:8px;margin-bottom:24px;flex-wrap:wrap}
.tab{padding:10px 18px;border-radius:8px;font-size:13px;font-weight:600;cursor:pointer;border:1px solid var(--b);background:#fff;transition:all .2s;color:var(--ts)}
.tab:hover{border-color:var(--p);color:var(--p)}
.tab.active{background:var(--p);color:#fff;border-color:var(--p)}
.panel{display:none}
.panel.active{display:block}

/* Step flow */
.steps{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px}
.step{position:relative;text-align:center;padding:24px 16px}
.step .step-num{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,var(--p),var(--pd));color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:20px;font-weight:800;margin-bottom:12px}
.step h4{font-size:16px;margin-bottom:6px}
.step p{font-size:13px;color:var(--ts)}

/* Hero specific */
.hero{min-height:90vh;display:flex;align-items:center;position:relative;overflow:hidden;background:linear-gradient(170deg,#F8FAFC 0%,#F0FDFA 30%,#E6FFFA 60%,#CCFBF1 100%)}
.hero::before{content:'';position:absolute;top:-200px;right:-100px;width:600px;height:600px;border-radius:50%;background:radial-gradient(circle,rgba(13,148,136,.08) 0%,transparent 70%);pointer-events:none}
.hero::after{content:'';position:absolute;bottom:-100px;left:-50px;width:400px;height:400px;border-radius:50%;background:radial-gradient(circle,rgba(245,158,11,.06) 0%,transparent 70%);pointer-events:none}
.hero-content{position:relative;z-index:1}
.hero h1{font-size:56px;font-weight:800;line-height:1.15;margin-bottom:20px;letter-spacing:-1px}
.hero h1 em{font-style:normal;color:var(--p)}
.hero .hero-desc{font-size:18px;color:var(--ts);max-width:520px;line-height:1.7;margin-bottom:32px}
.hero-btns{display:flex;gap:14px}
.hero-stats{display:flex;gap:40px;margin-top:48px;padding-top:32px;border-top:1px solid var(--b)}
.hero-stat .hs-num{font-size:36px;font-weight:800;color:var(--pd)}
.hero-stat .hs-label{font-size:13px;color:var(--ts);margin-top:2px}

/* Case cards */
.case-row{display:grid;grid-template-columns:1fr 2fr;gap:24px;background:#fff;border-radius:var(--r);padding:28px;border:1px solid var(--b);margin-bottom:20px;transition:all .2s}
.case-row:hover{border-color:var(--p);box-shadow:var(--sh-md)}
.case-row .case-left .case-tag{display:inline-block;padding:3px 12px;border-radius:12px;font-size:11px;font-weight:600;background:#F0FDFA;color:var(--p);margin-bottom:10px}
.case-row .case-left h4{font-size:20px;margin-bottom:8px}
.case-row .case-left .case-meta{font-size:12px;color:var(--ts)}
.case-row .case-right h5{font-size:14px;color:var(--p);margin:8px 0 4px}
.case-row .case-right p{font-size:13px;color:var(--ts);margin-bottom:6px}

/* Footer */
footer{background:#042F2E;color:#fff;padding:60px 0 32px}
footer .ft-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}
footer h4{font-size:14px;font-weight:600;margin-bottom:16px;color:rgba(255,255,255,.7);text-transform:uppercase;letter-spacing:.5px;font-size:11px}
footer a{display:block;color:rgba(255,255,255,.5);text-decoration:none;font-size:13px;padding:4px 0;transition:color .2s}
footer a:hover{color:#fff}
footer .ft-copy{margin-top:40px;padding-top:24px;border-top:1px solid rgba(255,255,255,.1);text-align:center;font-size:12px;color:rgba(255,255,255,.35)}

/* Responsive */
@media(max-width:768px){
  .container{padding:0 20px}
  nav .container{padding:0 20px}
  .nav-links{display:none;position:fixed;top:var(--nav-h);left:0;right:0;background:#fff;flex-direction:column;padding:20px;gap:8px;border-bottom:1px solid var(--b);box-shadow:var(--sh-lg)}
  .nav-links.open{display:flex}
  .nav-toggle{display:block}
  .hero h1{font-size:36px}
  .hero-stats{flex-wrap:wrap;gap:20px}
  .section h2{font-size:28px}
  .case-row{grid-template-columns:1fr}
  .card-grid{grid-template-columns:1fr}
  footer .ft-grid{grid-template-columns:1fr 1fr;gap:24px}
  .page-header h1{font-size:32px}
  .page-header{padding:100px 0 40px}
}

/* Animations */
@keyframes fadeUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
.animate{animation:fadeUp .6s ease both}