:root{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light;color:#1e293b;background-color:#fff;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{margin:0;padding:0;box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh}button{font-family:inherit}button:focus,button:focus-visible{outline:none}*{margin:0;padding:0;box-sizing:border-box;word-wrap:break-word;overflow-wrap:break-word}:root{--bg-primary: #ffffff;--bg-secondary: #f8fafc;--text-primary: #1e293b;--text-secondary: #64748b;--border-color: #e2e8f0;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1)}.dark{--bg-primary: #0a0f1c;--bg-secondary: #111827;--text-primary: #f8fafc;--text-secondary: 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i{font-size:36px;color:#fff}.modal-header h3{font-size:1.25rem;font-weight:700;color:var(--text-primary);margin-bottom:.25rem}.modal-header p{font-size:.875rem;color:var(--text-secondary)}.modal-body{display:flex;flex-direction:column;align-items:center;gap:1rem}.wechat-card{background:var(--bg-secondary);padding:1.25rem 2.5rem;border-radius:.75rem}.wechat-id{font-size:1.75rem;font-weight:400;color:var(--text-primary);font-family:monospace;letter-spacing:.05em}.copy-btn{display:flex;align-items:center;gap:.5rem;padding:.625rem 1.25rem;background:#07c160;color:#fff;border:none;border-radius:.5rem;font-size:.9rem;font-weight:500;cursor:pointer;transition:all .2s ease}.copy-btn:hover{background:#05a350;transform:translateY(-1px)}.copy-btn:active{transform:translateY(0)}.copy-btn i{font-size:16px}.toast{position:fixed;bottom:100px;left:50%;transform:translate(-50%);background:#000c;color:#fff;padding:.75rem 1.5rem;border-radius:2rem;display:flex;align-items:center;gap:.5rem;font-size:.9rem;animation:fadeInUp .3s ease;z-index:3000}.toast i{font-size:18px;color:#07c160}@keyframes fadeInUp{0%{opacity:0;transform:translate(-50%) translateY(10px)}to{opacity:1;transform:translate(-50%) translateY(0)}}@media(max-width:1024px){.features-grid{grid-template-columns:repeat(2,1fr)}.section-title{font-size:2rem}}@media(max-width:768px){.features{padding:60px 1.25rem}.features-grid{grid-template-columns:1fr}.section-title{font-size:1.75rem}.section-subtitle{font-size:.9rem}.footer{padding:16px 1.25rem}.footer-container{flex-direction:column;gap:1rem;align-items:center}.footer-links{gap:1rem;flex-wrap:wrap;justify-content:center}}@media(max-width:480px){.features{padding:50px .875rem}.section-title{font-size:1.5rem}.feature-card{padding:1.25rem}.footer{padding:12px .875rem}.footer-links{gap:1.25rem}.footer-link{font-size:.85rem}}