*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;line-height:1.8;color:#333;background:#f8f9fa}a{color:#2a9d8f;text-decoration:none;transition:color .2s}a:hover{color:#1a7a6d}img{max-width:100%;height:auto}ul{list-style:none}.container{max-width:1100px;margin:0 auto;padding:0 20px}.header{background:#fff;border-bottom:3px solid #2a9d8f;position:sticky;top:0;z-index:100;box-shadow:0 2px 8px #0000000f}.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}.logo{font-size:1.4rem;font-weight:700;color:#2a9d8f}.nav{display:flex;gap:24px}.nav a{color:#555;font-size:.95rem;font-weight:500;padding:4px 0;border-bottom:2px solid transparent;transition:all .2s}.nav a:hover{color:#2a9d8f;border-bottom-color:#2a9d8f}.main{min-height:60vh}.hero{background:linear-gradient(135deg,#2a9d8f,#264653);color:#fff;padding:80px 0 60px;text-align:center}.hero h1{font-size:2.6rem;margin-bottom:16px;line-height:1.3}.hero p{font-size:1.2rem;opacity:.9;max-width:600px;margin:0 auto 32px}.hero-btn{display:inline-block;background:#fff;color:#2a9d8f;padding:12px 36px;border-radius:8px;font-weight:600;font-size:1.05rem;transition:transform .2s,box-shadow .2s}.hero-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px #00000026;color:#1a7a6d}.section{padding:60px 0}.section:nth-child(2n){background:#fff}.section-title{font-size:1.8rem;color:#264653;text-align:center;margin-bottom:12px}.section-subtitle{text-align:center;color:#888;margin-bottom:40px;font-size:1.05rem}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}.card{background:#fff;border-radius:12px;padding:32px 28px;box-shadow:0 2px 12px #0000000f;transition:transform .2s,box-shadow .2s;border-top:4px solid #2a9d8f}.card:hover{transform:translateY(-4px);box-shadow:0 8px 30px #0000001a}.card-icon{font-size:2.4rem;margin-bottom:16px}.card h3{font-size:1.2rem;color:#264653;margin-bottom:10px}.card p{color:#666;font-size:.95rem;line-height:1.7}.article{max-width:800px;margin:0 auto;padding:60px 20px}.article h2{font-size:1.6rem;color:#264653;margin:40px 0 16px;padding-bottom:8px;border-bottom:2px solid #e9ecef}.article h3{font-size:1.25rem;color:#2a9d8f;margin:28px 0 12px}.article p{margin-bottom:16px;color:#444}.article ul,.article ol{margin:12px 0 20px 24px;list-style:disc}.article ol{list-style:decimal}.article li{margin-bottom:8px;color:#444}.article blockquote{border-left:4px solid #2a9d8f;background:#f0f7f6;padding:16px 20px;margin:20px 0;border-radius:0 8px 8px 0}.article blockquote p{color:#264653;margin:0}.article table{width:100%;border-collapse:collapse;margin:20px 0}.article th,.article td{padding:10px 14px;border:1px solid #dee2e6;text-align:left}.article th{background:#2a9d8f;color:#fff}.cta{background:linear-gradient(135deg,#2a9d8f,#264653);color:#fff;text-align:center;padding:60px 20px;border-radius:12px;margin:40px 0}.cta h2{font-size:1.5rem;margin-bottom:12px}.cta p{opacity:.9;margin-bottom:24px}.references{font-size:.85rem;color:#888;list-style:decimal;margin-top:32px;padding-left:20px}.references li{margin-bottom:6px;line-height:1.5}sup{color:#2a9d8f;font-size:.75rem}.footer{background:#264653;color:#ddd;padding:48px 0 24px;margin-top:40px}.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:32px;margin-bottom:32px}.footer h3{color:#fff;font-size:1.1rem;margin-bottom:12px}.footer a{color:#a8d8d0}.footer a:hover{color:#fff}.footer ul li{margin-bottom:6px}.copyright{text-align:center;padding-top:24px;border-top:1px solid rgba(255,255,255,.15);font-size:.85rem;color:#999}@media(max-width:768px){.header-inner{flex-direction:column;height:auto;padding:12px 0;gap:8px}.nav{gap:12px;flex-wrap:wrap;justify-content:center}.nav a{font-size:.85rem}.hero h1{font-size:1.8rem}.hero p{font-size:1rem}.section-title{font-size:1.4rem}}