*{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#6d4aff;--primary-dark:#5939e5;--secondary:#1a1a2e;--accent:#00d4aa;--text:#333;--text-light:#666;--bg:#f8f9fa;--white:#fff;--border:#e0e0e0;--shadow:0 2px 12px rgba(0,0,0,.08);--radius:8px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans SC",sans-serif;color:var(--text);line-height:1.7;background:var(--white)}
a{color:var(--primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--primary-dark)}
img{max-width:100%;height:auto}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
/* Language Toggle */
#lang-toggle{display:none}
.lang-en{display:none}
.lang-zh{display:block}
#lang-toggle:checked~.page-wrapper .lang-zh{display:none}
#lang-toggle:checked~.page-wrapper .lang-en{display:block}
.lang-btn{cursor:pointer;padding:6px 16px;border:2px solid var(--primary);border-radius:20px;font-size:14px;font-weight:600;color:var(--primary);transition:all .2s;display:inline-block}
.lang-btn:hover{background:var(--primary);color:var(--white)}
/* Header */
header{background:var(--secondary);padding:15px 0;position:sticky;top:0;z-index:1000;box-shadow:0 2px 8px rgba(0,0,0,.3)}
header .container{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap}
.logo{font-size:24px;font-weight:800;color:var(--white)}
.logo span{color:var(--accent)}
nav{display:flex;align-items:center;gap:5px;flex-wrap:wrap}
nav a{color:rgba(255,255,255,.85);padding:8px 14px;border-radius:var(--radius);font-size:14px;font-weight:500;transition:all .2s}
nav a:hover{color:var(--white);background:rgba(255,255,255,.1)}
/* Hero */
.hero{background:linear-gradient(135deg,var(--secondary) 0%,#16213e 50%,var(--primary-dark) 100%);padding:80px 0;text-align:center;color:var(--white)}
.hero h1{font-size:48px;font-weight:800;margin-bottom:20px;line-height:1.2}
.hero p{font-size:20px;opacity:.9;max-width:700px;margin:0 auto 30px}
.hero-badges{display:flex;justify-content:center;gap:20px;flex-wrap:wrap;margin-top:30px}
.hero-badge{background:rgba(255,255,255,.1);padding:12px 24px;border-radius:var(--radius);backdrop-filter:blur(4px)}
.hero-badge strong{display:block;font-size:24px;color:var(--accent)}
/* Buttons */
.btn{display:inline-block;padding:14px 32px;border-radius:var(--radius);font-weight:600;font-size:16px;transition:all .2s;text-align:center}
.btn-primary{background:var(--primary);color:var(--white)}
.btn-primary:hover{background:var(--primary-dark);color:var(--white);transform:translateY(-2px);box-shadow:0 4px 12px rgba(109,74,255,.4)}
.btn-secondary{background:transparent;color:var(--white);border:2px solid var(--white)}
.btn-secondary:hover{background:var(--white);color:var(--secondary)}
.btn-accent{background:var(--accent);color:var(--secondary)}
.btn-accent:hover{background:#00b894;color:var(--white);transform:translateY(-2px)}
.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary)}
.btn-outline:hover{background:var(--primary);color:var(--white)}
/* Sections */
section{padding:60px 0}
.section-title{text-align:center;margin-bottom:50px}
.section-title h2{font-size:36px;font-weight:700;margin-bottom:12px;color:var(--secondary)}
.section-title p{font-size:18px;color:var(--text-light);max-width:600px;margin:0 auto}
/* Features Grid */
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:30px}
.feature-card{background:var(--white);border:1px solid var(--border);border-radius:12px;padding:30px;text-align:center;transition:all .3s}
.feature-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.feature-icon{width:64px;height:64px;margin:0 auto 20px;background:linear-gradient(135deg,var(--primary),var(--accent));border-radius:16px;display:flex;align-items:center;justify-content:center}
.feature-icon svg{width:32px;height:32px;fill:var(--white)}
.feature-card h3{font-size:20px;margin-bottom:10px;color:var(--secondary)}
.feature-card p{color:var(--text-light);font-size:15px}
/* Pricing */
.pricing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:30px;max-width:1100px;margin:0 auto}
.pricing-card{background:var(--white);border:2px solid var(--border);border-radius:16px;padding:40px 30px;text-align:center;transition:all .3s;position:relative}
.pricing-card.popular{border-color:var(--primary);transform:scale(1.05)}
.pricing-card.popular::before{content:"最受欢迎";position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:var(--primary);color:var(--white);padding:4px 20px;border-radius:20px;font-size:13px;font-weight:600}
.pricing-card h3{font-size:24px;margin-bottom:8px;color:var(--secondary)}
.pricing-card .price{font-size:48px;font-weight:800;color:var(--primary);margin:20px 0}
.pricing-card .price span{font-size:16px;color:var(--text-light);font-weight:400}
.pricing-card ul{list-style:none;margin:20px 0;text-align:left}
.pricing-card ul li{padding:8px 0;border-bottom:1px solid var(--border);font-size:14px;color:var(--text-light)}
.pricing-card ul li::before{content:"✓";color:var(--accent);font-weight:700;margin-right:8px}
/* FAQ */
.faq-category{margin-bottom:40px}
.faq-category h3{font-size:24px;color:var(--secondary);margin-bottom:20px;padding-bottom:10px;border-bottom:3px solid var(--primary)}
.faq-item{background:var(--bg);border-radius:var(--radius);padding:24px;margin-bottom:16px}
.faq-item h4{font-size:18px;color:var(--secondary);margin-bottom:12px}
.faq-steps{counter-reset:step;list-style:none}
.faq-steps li{counter-increment:step;padding:8px 0 8px 40px;position:relative;color:var(--text-light);font-size:15px}
.faq-steps li::before{content:counter(step);position:absolute;left:0;top:8px;width:28px;height:28px;background:var(--primary);color:var(--white);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700}
/* Blog */
.blog-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:30px}
.blog-card{background:var(--white);border:1px solid var(--border);border-radius:12px;overflow:hidden;transition:all .3s}
.blog-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.blog-card-img{height:200px;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;color:var(--white);font-size:48px}
.blog-card-body{padding:24px}
.blog-card-meta{font-size:13px;color:var(--text-light);margin-bottom:10px}
.blog-card-meta span{margin-right:15px}
.blog-card h3{font-size:20px;margin-bottom:10px;color:var(--secondary)}
.blog-card p{color:var(--text-light);font-size:14px;margin-bottom:15px}
/* Article */
.article-header{background:linear-gradient(135deg,var(--secondary),var(--primary-dark));color:var(--white);padding:60px 0;text-align:center}
.article-header h1{font-size:36px;font-weight:700;margin-bottom:15px}
.article-meta{font-size:14px;opacity:.8}
.article-meta span{margin:0 10px}
.article-body{max-width:800px;margin:0 auto;padding:40px 20px}
.article-body h2{font-size:28px;margin:30px 0 15px;color:var(--secondary)}
.article-body h3{font-size:22px;margin:25px 0 12px;color:var(--secondary)}
.article-body p{margin-bottom:16px;font-size:16px;line-height:1.8;color:var(--text)}
.article-body img{border-radius:var(--radius);margin:20px 0}
.article-body ul,.article-body ol{margin:15px 0 15px 30px}
.article-body li{margin-bottom:8px}
/* Breadcrumb */
.breadcrumb{padding:15px 0;font-size:14px;color:var(--text-light);border-bottom:1px solid var(--border)}
.breadcrumb a{color:var(--text-light)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb span{margin:0 8px;color:var(--border)}
/* Footer */
footer{background:var(--secondary);color:rgba(255,255,255,.7);padding:50px 0 20px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:30px;margin-bottom:30px}
.footer-col h4{color:var(--white);font-size:16px;margin-bottom:15px}
.footer-col a{display:block;color:rgba(255,255,255,.6);padding:4px 0;font-size:14px;transition:color .2s}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);font-size:13px}
/* Stats */
.stats-section{background:var(--bg);padding:40px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat-item h3{font-size:36px;font-weight:800;color:var(--primary)}
.stat-item p{font-size:14px;color:var(--text-light);margin-top:5px}
/* Testimonials */
.testimonials{background:var(--bg)}
.testimonial-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:30px}
.testimonial-card{background:var(--white);border-radius:12px;padding:30px;box-shadow:var(--shadow)}
.testimonial-card p{font-style:italic;color:var(--text-light);margin-bottom:15px}
.testimonial-card .author{font-weight:600;color:var(--secondary)}
/* CTA */
.cta-section{background:linear-gradient(135deg,var(--primary),var(--primary-dark));padding:60px 0;text-align:center;color:var(--white)}
.cta-section h2{font-size:36px;font-weight:700;margin-bottom:15px}
.cta-section p{font-size:18px;opacity:.9;margin-bottom:30px}
/* Platform Icons */
.platform-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:20px;max-width:800px;margin:30px auto}
.platform-card{background:var(--white);border:1px solid var(--border);border-radius:12px;padding:30px;text-align:center;transition:all .3s}
.platform-card:hover{border-color:var(--primary);transform:translateY(-3px);box-shadow:var(--shadow)}
.platform-card svg{width:48px;height:48px;margin-bottom:10px}
.platform-card h4{font-size:16px;color:var(--secondary)}
/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.contact-info{padding:30px}
.contact-info h3{font-size:24px;margin-bottom:20px;color:var(--secondary)}
.contact-info p{margin-bottom:15px;color:var(--text-light)}
.contact-form{background:var(--bg);padding:30px;border-radius:12px}
/* Responsive */
@media(max-width:768px){
.hero h1{font-size:32px}
.hero p{font-size:16px}
.stats-grid{grid-template-columns:repeat(2,1fr)}
.contact-grid{grid-template-columns:1fr}
nav{gap:2px}
nav a{padding:6px 10px;font-size:13px}
.pricing-card.popular{transform:scale(1)}
.section-title h2{font-size:28px}
}