:root{--color-primary:#2563eb;--color-primary-dark:#1d4ed8;--color-primary-light:#dbeafe;--color-secondary:#0f172a;--color-accent:#10b981;--color-bg:#fff;--color-bg-alt:#f8fafc;--color-bg-dark:#0f172a;--color-text:#1e293b;--color-text-light:#64748b;--color-text-inv:#fff;--color-border:#e2e8f0;--radius:8px;--shadow-sm:0 1px 2px rgba(0,0,0,.05);--shadow:0 1px 3px rgba(0,0,0,.1),0 1px 2px rgba(0,0,0,.06);--shadow-md:0 4px 6px rgba(0,0,0,.1);--max-w:1120px}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:"PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;color:var(--color-text);background:var(--color-bg);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--color-primary);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}
h1,h2,h3,h4,h5,h6{line-height:1.25;font-weight:700;color:var(--color-secondary)}
h1{font-size:2.25rem}
h2{font-size:1.75rem}
h3{font-size:1.25rem}
p{margin-top:.5rem}
ul,ol{padding-left:1.25rem}
.container{width:100%;max-width:var(--max-w);margin:0 auto;padding:0 1.25rem}
.section{padding:4rem 0}
.section-alt{background:var(--color-bg-alt)}
.section-dark{background:var(--color-bg-dark);color:var(--color-text-inv)}
.section-dark h2,.section-dark h3{color:var(--color-text-inv)}
.text-center{text-align:center}
.text-light{color:var(--color-text-light)}
.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}.mt-4{margin-top:2rem}
.mb-2{margin-bottom:1rem}.mb-3{margin-bottom:1.5rem}
.max-w-prose{max-width:680px}
.mx-auto{margin-left:auto;margin-right:auto}
.site-nav{background:rgba(255,255,255,.95);border-bottom:1px solid var(--color-border);position:sticky;top:0;z-index:100;backdrop-filter:blur(8px)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.nav-logo{font-size:1.25rem;font-weight:700;color:var(--color-secondary)}
.nav-logo:hover{text-decoration:none}
.nav-links{display:flex;gap:1.5rem;list-style:none;padding:0}
.nav-links a{color:var(--color-text);font-size:.95rem;font-weight:500}
.nav-links a:hover{color:var(--color-primary);text-decoration:none}
.nav-toggle{display:none;background:none;border:none;font-size:1.5rem;cursor:pointer;padding:.25rem}
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.75rem 1.5rem;border-radius:var(--radius);font-size:1rem;font-weight:600;border:none;cursor:pointer;transition:background .2s,transform .1s;text-decoration:none}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn-primary{background:var(--color-primary);color:var(--color-text-inv)}
.btn-primary:hover{background:var(--color-primary-dark)}
.btn-outline{background:transparent;color:var(--color-primary);border:2px solid var(--color-primary)}
.btn-outline:hover{background:var(--color-primary);color:var(--color-text-inv)}
.btn-sm{padding:.5rem 1rem;font-size:.875rem}
.btn-group{display:flex;flex-wrap:wrap;gap:1rem;margin-top:1.5rem}
.btn-white{background:#fff;color:var(--color-primary)}
.btn-white:hover{background:var(--color-primary-light)}
.card{background:#fff;border:1px solid var(--color-border);border-radius:var(--radius);padding:1.5rem;box-shadow:var(--shadow-sm);transition:box-shadow .2s}
.card:hover{box-shadow:var(--shadow-md)}
.card h3{margin-bottom:.5rem}
.card-icon{width:48px;height:48px;background:var(--color-primary-light);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:1rem}
.card-icon svg{width:24px;height:24px;stroke:var(--color-primary);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:1.5rem}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem}
.pricing-card{background:#fff;border:2px solid var(--color-border);border-radius:var(--radius);padding:2rem;text-align:center;display:flex;flex-direction:column}
.pricing-card.featured{border-color:var(--color-primary);box-shadow:var(--shadow-md);position:relative}
.pricing-card.featured::before{content:"推荐";position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--color-primary);color:#fff;padding:.25rem 1rem;border-radius:1rem;font-size:.75rem;font-weight:600}
.pricing-card h3{font-size:1.25rem}
.price{font-size:2.5rem;font-weight:700;color:var(--color-primary);margin:1rem 0 .5rem}
.price span{font-size:1rem;font-weight:400;color:var(--color-text-light)}
.pricing-features{list-style:none;padding:0;margin:1.5rem 0;text-align:left;flex:1}
.pricing-features li{padding:.375rem 0;padding-left:1.5rem;position:relative;font-size:.9rem}
.pricing-features li::before{content:"✓";color:var(--color-accent);font-weight:700;position:absolute;left:0}
.case-card{background:#fff;border:1px solid var(--color-border);border-radius:var(--radius);overflow:hidden}
.case-header{background:var(--color-primary-light);padding:1.5rem;text-align:center}
.case-header .case-icon{font-size:2rem;margin-bottom:.5rem}
.case-body{padding:1.5rem}
.case-stat{display:flex;justify-content:space-between;padding:.5rem 0;border-bottom:1px solid var(--color-border);font-size:.9rem}
.case-stat:last-child{border-bottom:none}
.case-stat strong{color:var(--color-primary)}
.blog-list{display:flex;flex-direction:column;gap:2rem}
.blog-card{background:#fff;border:1px solid var(--color-border);border-radius:var(--radius);padding:2rem}
.blog-card .blog-date{font-size:.8rem;color:var(--color-text-light)}
.blog-card h3{margin:.5rem 0}
.blog-card p{color:var(--color-text-light)}
.article-body h2{margin-top:2rem;margin-bottom:.75rem}
.article-body p{margin-bottom:1rem}
.article-body ul,.article-body ol{margin-bottom:1rem}
.article-body li{margin-bottom:.375rem}
.article-body blockquote{border-left:4px solid var(--color-primary);padding:1rem 1.25rem;margin:1.5rem 0;background:var(--color-primary-light);border-radius:0 var(--radius) var(--radius) 0}
.faq-item{border-bottom:1px solid var(--color-border);padding:1.25rem 0}
.faq-item h3{font-size:1.05rem;margin-bottom:.5rem}
.faq-item p{color:var(--color-text-light);font-size:.95rem}
.contact-form{max-width:560px;margin:0 auto}
.form-group{margin-bottom:1.25rem}
.form-group label{display:block;font-weight:600;margin-bottom:.375rem;font-size:.95rem}
.form-group input,.form-group textarea,.form-group select{width:100%;padding:.75rem 1rem;border:1px solid var(--color-border);border-radius:var(--radius);font-size:1rem;font-family:inherit}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{outline:2px solid var(--color-primary);outline-offset:1px;border-color:var(--color-primary)}
.form-group textarea{resize:vertical;min-height:120px}
.wechat-box{background:var(--color-bg-alt);border:1px dashed var(--color-primary);border-radius:var(--radius);padding:2rem;text-align:center;max-width:400px;margin:2rem auto 0}
.wechat-placeholder{width:160px;height:160px;background:var(--color-primary-light);border-radius:var(--radius);margin:1rem auto;display:flex;align-items:center;justify-content:center;font-size:3rem}
.site-footer{background:var(--color-bg-dark);color:var(--color-text-inv);padding:3rem 0 1.5rem}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:2rem;margin-bottom:2rem}
.footer-grid h4{color:var(--color-text-inv);font-size:1rem;margin-bottom:.75rem}
.footer-grid a{color:#94a3b8;font-size:.9rem;display:block;padding:.25rem 0}
.footer-grid a:hover{color:#fff}
.footer-bottom{border-top:1px solid #334155;padding-top:1rem;text-align:center;font-size:.85rem;color:#94a3b8}
.breadcrumb{padding:.75rem 0;font-size:.85rem;color:var(--color-text-light)}
.breadcrumb a{color:var(--color-primary)}
.hero{padding:5rem 0 4rem;text-align:center}
.hero h1{font-size:2.75rem;max-width:720px;margin:0 auto}
.hero p{font-size:1.15rem;color:var(--color-text-light);max-width:560px;margin:1rem auto 0}
.steps{display:flex;flex-direction:column;gap:1.5rem;max-width:640px}
.step{display:flex;gap:1rem;align-items:flex-start}
.step-num{width:40px;height:40px;background:var(--color-primary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;flex-shrink:0}
.step h3{margin-bottom:.25rem}
.step p{color:var(--color-text-light);font-size:.95rem}
.stats-row{display:flex;justify-content:center;gap:3rem;flex-wrap:wrap;margin:2rem 0}
.stat-item{text-align:center}
.stat-num{font-size:2rem;font-weight:700;color:var(--color-primary)}
.stat-label{font-size:.85rem;color:var(--color-text-light);margin-top:.25rem}
.legal-body h2{margin-top:2rem;margin-bottom:.5rem}
.legal-body p,.legal-body li{color:var(--color-text-light);line-height:1.7;font-size:.95rem}
.legal-body ul{margin-bottom:1rem}
@media(max-width:768px){
.nav-links{display:none}
.nav-toggle{display:block}
.nav-links.open{display:flex;flex-direction:column;position:absolute;top:64px;left:0;right:0;background:#fff;border-bottom:1px solid var(--color-border);padding:1rem 1.25rem;box-shadow:var(--shadow)}
.hero{padding:3rem 0 2rem}
.hero h1{font-size:1.75rem}
.hero p{font-size:1rem}
h2{font-size:1.4rem}
.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr 1fr}
.stats-row{gap:1.5rem}
.section{padding:2.5rem 0}
.pricing-card{padding:1.5rem}
.btn-group{flex-direction:column}
.btn-group .btn{width:100%;justify-content:center}
}
@media(max-width:480px){
.footer-grid{grid-template-columns:1fr}
}