/* ========== Reset & Base ========== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;line-height:1.7;color:#2c3e50;background:#fff;overflow-x:hidden}
a{color:inherit;text-decoration:none;transition:color .2s}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}

/* ========== CSS Variables ========== */
:root{
  --primary:#1a6dcc;
  --primary-dark:#155a96;
  --primary-light:#e8f2fc;
  --accent:#00b4a6;
  --accent-light:#e0f7f5;
  --text:#2c3e50;
  --text-light:#6b7c8c;
  --text-lighter:#9aaab8;
  --bg:#ffffff;
  --bg-alt:#f7f9fb;
  --border:#e4e9ee;
  --shadow:0 2px 12px rgba(0,0,0,.06);
  --shadow-lg:0 8px 32px rgba(0,0,0,.1);
  --radius:8px;
  --radius-lg:16px;
  --max-width:1200px;
}

/* ========== Layout ========== */
.container{max-width:var(--max-width);margin:0 auto;padding:0 24px}
.section{padding:72px 0}
.section-alt{background:var(--bg-alt)}
.section-title{text-align:center;margin-bottom:48px}
.section-title h2{font-size:2rem;font-weight:700;color:var(--text);margin-bottom:12px}
.section-title p{color:var(--text-light);font-size:1.05rem;max-width:640px;margin:0 auto}
.section-title .divider{width:48px;height:3px;background:var(--primary);margin:16px auto 0;border-radius:2px}

/* ========== Header ========== */
.header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);transition:box-shadow .3s}
.header.scrolled{box-shadow:var(--shadow)}
.header .container{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-size:1.25rem;font-weight:700;color:var(--text)}
.logo .logo-icon{width:38px;height:38px;background:linear-gradient(135deg,var(--primary),var(--accent));border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.1rem;font-weight:800;flex-shrink:0}
.logo .logo-text{display:flex;flex-direction:column;line-height:1.2}
.logo .logo-text .cn{font-size:1.15rem}
.logo .logo-text .en{font-size:.65rem;color:var(--text-lighter);font-weight:400;letter-spacing:.5px}
.nav{display:flex;align-items:center;gap:8px}
.nav a{padding:8px 16px;border-radius:6px;font-size:.95rem;color:var(--text);font-weight:500;transition:all .2s}
.nav a:hover,.nav a.active{color:var(--primary);background:var(--primary-light)}
.nav-cta{margin-left:8px;padding:8px 20px;background:var(--primary);color:#fff !important;border-radius:6px;font-weight:500;transition:background .2s}
.nav-cta:hover{background:var(--primary-dark);color:#fff !important}
.menu-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.menu-toggle span{width:24px;height:2px;background:var(--text);border-radius:2px;transition:all .3s}

/* ========== Hero ========== */
.hero{position:relative;padding:140px 0 80px;background:linear-gradient(135deg,#f0f6fc 0%,#e8f4f3 100%);overflow:hidden}
.hero::before{content:'';position:absolute;top:-50%;right:-10%;width:600px;height:600px;background:radial-gradient(circle,rgba(26,109,204,.08) 0%,transparent 70%);border-radius:50%}
.hero::after{content:'';position:absolute;bottom:-30%;left:-10%;width:400px;height:400px;background:radial-gradient(circle,rgba(0,180,166,.08) 0%,transparent 70%);border-radius:50%}
.hero .container{position:relative;z-index:1;display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.hero-content h1{font-size:2.6rem;font-weight:800;line-height:1.3;color:var(--text);margin-bottom:20px}
.hero-content h1 .highlight{color:var(--primary)}
.hero-content .subtitle{font-size:1.15rem;color:var(--text-light);margin-bottom:32px;line-height:1.8}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:8px;font-size:.95rem;font-weight:600;cursor:pointer;transition:all .2s;border:none}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 4px 16px rgba(26,109,204,.3)}
.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff}
.hero-visual{display:flex;justify-content:center;align-items:center}
.hero-card{background:#fff;border-radius:var(--radius-lg);padding:32px;box-shadow:var(--shadow-lg);width:100%;max-width:420px}
.hero-card .card-header{display:flex;align-items:center;gap:12px;margin-bottom:24px;padding-bottom:16px;border-bottom:2px solid var(--primary-light)}
.hero-card .card-header .icon{width:48px;height:48px;background:var(--primary-light);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.4rem}
.hero-card .card-header h3{font-size:1.1rem;font-weight:700}
.hero-card .card-header p{font-size:.8rem;color:var(--text-light)}
.hero-stats{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.hero-stats .stat{text-align:center;padding:16px;background:var(--bg-alt);border-radius:var(--radius)}
.hero-stats .stat .num{font-size:1.8rem;font-weight:800;color:var(--primary)}
.hero-stats .stat .label{font-size:.8rem;color:var(--text-light);margin-top:4px}

/* ========== Services Cards ========== */
.services-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px}
.service-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;transition:all .3s;position:relative;overflow:hidden}
.service-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--primary),var(--accent));transform:scaleX(0);transform-origin:left;transition:transform .3s}
.service-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px);border-color:transparent}
.service-card:hover::before{transform:scaleX(1)}
.service-card .icon{width:56px;height:56px;background:var(--primary-light);border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.6rem;margin-bottom:20px}
.service-card h3{font-size:1.25rem;font-weight:700;margin-bottom:12px;color:var(--text)}
.service-card p{color:var(--text-light);font-size:.95rem;margin-bottom:16px;line-height:1.8}
.service-card .features{display:flex;flex-wrap:wrap;gap:8px}
.service-card .features li{font-size:.82rem;padding:4px 12px;background:var(--bg-alt);border-radius:20px;color:var(--text-light)}

/* ========== Features Section ========== */
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:32px}
.feature-item{text-align:center;padding:24px}
.feature-item .icon{width:72px;height:72px;margin:0 auto 20px;background:linear-gradient(135deg,var(--primary),var(--accent));border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.8rem;color:#fff}
.feature-item h3{font-size:1.15rem;font-weight:700;margin-bottom:10px}
.feature-item p{color:var(--text-light);font-size:.95rem}

/* ========== About Section ========== */
.about-content{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.about-text h2{font-size:2rem;font-weight:700;margin-bottom:20px}
.about-text p{color:var(--text-light);margin-bottom:16px;line-height:1.9}
.about-info{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:24px}
.about-info .info-item{padding:16px;background:var(--bg-alt);border-radius:var(--radius);border-left:3px solid var(--primary)}
.about-info .info-item .label{font-size:.8rem;color:var(--text-lighter);margin-bottom:4px}
.about-info .info-item .value{font-size:.95rem;font-weight:600;color:var(--text)}
.about-visual{display:flex;justify-content:center}
.about-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);padding:40px;box-shadow:var(--shadow);width:100%;max-width:440px}
.about-card .badge{display:inline-block;padding:4px 14px;background:var(--accent-light);color:var(--accent);border-radius:20px;font-size:.8rem;font-weight:600;margin-bottom:20px}
.about-card h3{font-size:1.3rem;font-weight:700;margin-bottom:16px}
.about-card .info-list{display:flex;flex-direction:column;gap:14px}
.about-card .info-list li{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid var(--border);font-size:.9rem}
.about-card .info-list li:last-child{border-bottom:none}
.about-card .info-list .key{color:var(--text-light)}
.about-card .info-list .val{font-weight:600;color:var(--text)}

/* ========== CTA Section ========== */
.cta{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;text-align:center;padding:64px 0}
.cta h2{font-size:2rem;font-weight:700;margin-bottom:16px}
.cta p{font-size:1.05rem;opacity:.9;margin-bottom:32px}
.cta .btn{background:#fff;color:var(--primary)}
.cta .btn:hover{background:var(--bg-alt);transform:translateY(-2px)}

/* ========== Contact ========== */
.contact-content{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.contact-info{display:flex;flex-direction:column;gap:24px}
.contact-item{display:flex;gap:16px;align-items:flex-start;padding:24px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);transition:box-shadow .2s}
.contact-item:hover{box-shadow:var(--shadow)}
.contact-item .icon{width:48px;height:48px;background:var(--primary-light);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.3rem;flex-shrink:0}
.contact-item .info h4{font-size:1rem;font-weight:700;margin-bottom:4px}
.contact-item .info p{color:var(--text-light);font-size:.9rem}
.contact-form{background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px}
.contact-form h3{font-size:1.3rem;font-weight:700;margin-bottom:24px}
.form-group{margin-bottom:20px}
.form-group label{display:block;font-size:.9rem;font-weight:600;margin-bottom:6px;color:var(--text)}
.form-group input,.form-group textarea,.form-group select{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius);font-size:.9rem;font-family:inherit;transition:border-color .2s}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{outline:none;border-color:var(--primary)}
.form-group textarea{resize:vertical;min-height:120px}
.form-msg{padding:12px 16px;border-radius:var(--radius);font-size:.9rem;display:none;margin-top:16px}
.form-msg.success{display:block;background:var(--accent-light);color:var(--accent)}

/* ========== Breadcrumb ========== */
.breadcrumb{padding:100px 0 24px;background:var(--bg-alt)}
.breadcrumb .container{display:flex;align-items:center;gap:8px;font-size:.85rem;color:var(--text-light)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .separator{color:var(--text-lighter)}
.breadcrumb .current{color:var(--text);font-weight:500}

/* ========== Page Hero ========== */
.page-hero{padding:32px 0 48px;background:var(--bg-alt)}
.page-hero h1{font-size:2.2rem;font-weight:800;margin-bottom:12px}
.page-hero p{color:var(--text-light);font-size:1.05rem;max-width:680px}

/* ========== Footer ========== */
.footer{background:#1a2332;color:#9aaab8;padding:56px 0 24px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand .logo{color:#fff;margin-bottom:16px}
.footer-brand p{font-size:.9rem;line-height:1.8;margin-bottom:16px}
.footer-col h4{color:#fff;font-size:1rem;font-weight:600;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:.9rem;transition:color .2s}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;display:flex;justify-content:space-between;align-items:center;font-size:.85rem;flex-wrap:wrap;gap:12px}
.footer-bottom a{color:var(--accent)}
.footer-bottom .icp{display:flex;gap:16px;flex-wrap:wrap}

/* ========== Animations ========== */
@keyframes fadeInUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
.fade-in{animation:fadeInUp .6s ease forwards}
.fade-in-delay-1{animation-delay:.1s;opacity:0}
.fade-in-delay-2{animation-delay:.2s;opacity:0}
.fade-in-delay-3{animation-delay:.3s;opacity:0}

/* ========== Responsive ========== */
@media(max-width:968px){
  .hero .container,.about-content,.contact-content{grid-template-columns:1fr}
  .hero-visual,.about-visual{order:-1}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .nav{display:none;position:fixed;top:68px;left:0;right:0;background:#fff;flex-direction:column;padding:16px;box-shadow:var(--shadow-lg);border-top:1px solid var(--border)}
  .nav.open{display:flex}
  .nav a{width:100%;padding:12px 16px}
  .menu-toggle{display:flex}
  .hero-content h1{font-size:2rem}
  .section-title h2{font-size:1.6rem}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;text-align:center}
}
@media(max-width:480px){
  .hero-content h1{font-size:1.6rem}
  .section{padding:48px 0}
  .hero-stats{grid-template-columns:1fr}
  .about-info{grid-template-columns:1fr}
}