:root{
  --primary:#0052D9;
  --secondary:#FF6A00;
  --accent:#FFA533;
  --dark:#1A1A2E;
  --light:#F5F7FA;
  --gray:#BABF98;
  --slate:#555E6B;
  --line:#E0E4EA;
}
*{box-sizing:border-box;}
body{margin:0;font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;color:var(--dark);background:#fff;-webkit-font-smoothing:antialiased;line-height:1.7;}
a{color:var(--primary);text-decoration:none;font-weight:600;}
.container{max-width:1120px;margin:0 auto;padding:0 22px;}

/* ===== Header ===== */
.site-header{position:sticky;top:0;background:#fff;border-bottom:1px solid var(--line);z-index:10;box-shadow:0 1px 8px rgba(0,0,0,.04);}
.site-header .container{display:flex;align-items:center;justify-content:space-between;height:80px;}

/* ===== Logo ===== */
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;}
.logo img.logo-img{height:60px;width:auto;display:block;}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-text .brand-en{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;font-weight:800;font-size:20px;letter-spacing:2px;color:var(--dark);text-transform:uppercase;}
.logo-text .brand-zh{font-weight:700;font-size:14px;color:var(--dark);letter-spacing:2px;}
.logo-text .brand-sub{font-size:9px;font-weight:700;color:var(--secondary);letter-spacing:3px;text-transform:uppercase;margin-top:1px;}

/* ===== Nav ===== */
nav.main a{margin:0 14px;font-size:14.5px;color:var(--slate);font-weight:600;transition:color .2s;}
nav.main a:hover,nav.main a.active{color:var(--primary);}
.lang a{margin-left:10px;font-size:13px;color:var(--slate);font-weight:600;}
.lang a.active{color:var(--primary);}

/* ===== Hero ===== */
.hero{background:linear-gradient(135deg,var(--dark) 0%,#0d1230 50%,var(--primary) 100%);color:#fff;padding:80px 0 70px;position:relative;overflow:hidden;}
.hero::after{content:"";position:absolute;top:-60px;right:-80px;width:300px;height:300px;border-radius:50%;background:rgba(255,106,0,.08);pointer-events:none;}
.hero::before{content:"";position:absolute;bottom:-100px;left:-60px;width:240px;height:240px;border-radius:50%;background:rgba(0,82,217,.06);pointer-events:none;}
.hero h1{font-size:42px;margin:0 0 16px;font-weight:900;letter-spacing:1.5px;line-height:1.2;position:relative;z-index:1;}
.hero p{font-size:17.5px;max-width:700px;color:#c8d0e0;margin:0 0 30px;line-height:1.65;position:relative;z-index:1;}
.hero .slogan{display:inline-block;background:linear-gradient(90deg,var(--secondary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;font-weight:800;font-size:18px;letter-spacing:3px;margin-bottom:12px;}

/* ===== Buttons ===== */
.btn{display:inline-block;background:var(--primary);color:#fff;padding:13px 28px;border-radius:10px;font-weight:700;font-size:14.5px;transition:all .25s;cursor:pointer;border:none;}
.btn:hover{background:#0040b0;transform:translateY(-1px);box-shadow:0 6px 20px rgba(0,82,217,.35);}
.btn.ghost{background:transparent;border:2px solid rgba(255,255,255,.45);color:#fff;}
.btn.ghost:hover{border-color:#fff;background:rgba(255,255,255,.08);}
.btn.orange{background:linear-gradient(135deg,var(--secondary),var(--accent));}
.btn.orange:hover{box-shadow:0 6px 20px rgba(255,106,0,.35);}

/* ===== Sections ===== */
section{padding:70px 0;}
section.alt{background:var(--light);}
h2{font-size:29px;margin:0 0 8px;font-weight:800;color:var(--dark);letter-spacing:.5px;}
h3{font-size:19px;margin:0 0 10px;font-weight:700;color:var(--dark);}
.lead{color:var(--slate);font-size:16px;margin:0 0 32px;line-height:1.65;}

/* ===== Grids ===== */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.grid.c2{grid-template-columns:repeat(2,1fr);}
.grid.c4{grid-template-columns:repeat(4,1fr);}

/* ===== Cards ===== */
.card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px;box-shadow:0 4px 24px rgba(26,26,46,.04);transition:all .25s;position:relative;overflow:hidden;}
.card:hover{transform:translateY(-3px);box-shadow:0 12px 36px rgba(26,26,46,.1);}
.card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--primary),var(--secondary));opacity:0;transition:opacity .25s;}
.card:hover::before{opacity:1;}
.card h3{font-size:18.5px;}
.card p{color:var(--slate);font-size:14px;margin:0 0 12px;line-height:1.65;}
.card ul{margin:0;padding-left:18px;color:var(--slate);font-size:13.5px;line-height:1.75;}
.card ul li{margin:5px 0;}

/* ===== Tags ===== */
.tag{display:inline-block;font-size:11px;font-weight:800;padding:4px 11px;border-radius:20px;letter-spacing:.5px;text-transform:uppercase;}
.tag.primary{background:rgba(0,82,217,.1);color:var(--primary);}
.tag.edge{background:rgba(255,106,0,.1);color:var(--secondary);}
.tag.unique{background:linear-gradient(135deg,var(--secondary),var(--accent));color:#fff;}

/* ===== Values ===== */
.values{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:10px;}
.values .v{background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px;text-align:center;transition:all .25s;}
.values .v:hover{transform:translateY(-3px);box-shadow:0 8px 28px rgba(26,26,46,.08);}
.values .v h3{color:var(--primary);font-size:17px;margin-bottom:8px;}
.values .v p{color:var(--slate);font-size:14px;}

/* ===== Strength bar ===== */
.strength{display:flex;gap:28px;flex-wrap:wrap;margin-top:28px;}
.strength div{font-size:14px;color:var(--slate);padding:14px 18px;background:var(--light);border-radius:12px;border-left:4px solid var(--primary);}
.strength b{color:var(--dark);display:block;font-size:17px;font-weight:800;}

/* ===== CTA block ===== */
.cta{background:linear-gradient(135deg,#f0f4ff,#fff5ed);border-radius:20px;padding:48px 36px;text-align:center;margin-top:16px;border:1px solid var(--line);}
.cta h2{font-size:27px;margin-bottom:12px;}
.cta p{color:var(--slate);margin:0 0 24px;font-size:16px;}

/* ===== Forms ===== */
form.lead-form{max-width:580px;display:grid;gap:14px;}
form.lead-form label{font-size:13px;color:var(--slate);font-weight:700;}
form.lead-form input,form.lead-form textarea,form.lead-form select{width:100%;padding:13px 15px;border:1.5px solid var(--line);border-radius:10px;font-size:14.5px;font-family:inherit;transition:border-color .2s;}
form.lead-form input:focus,form.lead-form textarea:focus,form.lead-form select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(0,82,217,.1);}
.form-msg{padding:12px 16px;border-radius:10px;font-size:14px;font-weight:600;line-height:1.6;margin-top:2px;}
.form-msg.ok{background:#eaf7ee;border:1px solid #b7e0c2;color:#1a7f37;}
.form-msg.err{background:#fdecec;border:1px solid #f5c2c2;color:#b42318;}

/* ===== Contact grid ===== */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;}
.contact-info p{color:var(--slate);font-size:14.5px;margin:10px 0;}
.contact-info b{color:var(--dark);font-weight:700;}

/* ===== Note / Warning ===== */
.note{font-size:12.5px;color:var(--slate);background:linear-gradient(135deg,#fff9eb,#fff3db);border:1px solid #e8d9a0;border-radius:10px;padding:12px 16px;margin-top:20px;line-height:1.6;}

/* ===== Footer ===== */
footer.site{background:var(--dark);color:#8892a4;padding:44px 0;font-size:13px;}
footer.site a{color:#c8d0e0;font-weight:600;}
footer.site .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:18px;align-items:center;}

/* ===== Responsive ===== */
@media(max-width:880px){
  .grid,.grid.c2,.grid.c4,.values,.contact-grid{grid-template-columns:1fr;}
  .hero h1{font-size:30px;}nav.main{display:none;}
  .strength{flex-direction:column;}
}