:root{--page-background: #f3f8fa;--surface: #ffffff;--surface-soft: #f7fafb;--primary: #158f86;--primary-dark: #08766f;--primary-soft: #e4f5f2;--text-main: #163149;--text-secondary: #5f7487;--text-muted: #8294a3;--border: #d8e4ea;--border-strong: #c5d5dd;--danger: #b42318;--danger-background: #fff4f3;--shadow: 0 12px 28px rgba(22, 49, 73, .06), 0 2px 6px rgba(22, 49, 73, .04);--radius-sm: 8px;--radius-md: 14px;--radius-lg: 18px;--container-width: 1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-height:100vh;color:var(--text-main);background:radial-gradient(circle at top right,rgba(21,143,134,.07),transparent 32rem),var(--page-background);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button,input,select,textarea{font:inherit}button{border:0}a{color:inherit}.shell{width:min(var(--container-width),calc(100% - 40px));margin-inline:auto}h1,h2,h3,p{margin-top:0}.site-header{position:sticky;top:0;z-index:40;background:#fffffff0;border-bottom:1px solid var(--border);box-shadow:0 4px 18px #1631490a;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.header-inner{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:28px}.brand{display:inline-flex;align-items:center;gap:13px;text-decoration:none}.brand-mark{position:relative;width:43px;height:43px;flex:0 0 auto;border-radius:12px;background:var(--primary-soft)}.brand-mark:before,.brand-mark:after{content:"";position:absolute;left:11px;width:21px;height:2px;border-radius:999px;background:var(--primary)}.brand-mark:before{top:15px}.brand-mark:after{bottom:15px}.brand-arrow-left,.brand-arrow-right{position:absolute;width:7px;height:7px;border-top:2px solid var(--primary);border-right:2px solid var(--primary)}.brand-arrow-left{top:12px;left:9px;transform:rotate(-135deg)}.brand-arrow-right{right:9px;bottom:12px;transform:rotate(45deg)}.brand-text{display:flex;flex-direction:column;gap:3px}.brand-name{font-size:1rem;font-weight:800}.brand-tagline{color:var(--text-secondary);font-size:.7rem}.main-nav{display:flex;align-items:center;gap:8px}.nav-link{padding:10px 15px;border-radius:10px;color:var(--text-secondary);text-decoration:none;font-size:.84rem;font-weight:650}.nav-link:hover{color:var(--primary-dark);background:var(--surface-soft)}.nav-link.active{color:var(--primary-dark);background:var(--primary-soft)}.button{min-height:44px;display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 17px;border:1px solid transparent;border-radius:9px;text-decoration:none;font-size:.81rem;font-weight:700;cursor:pointer}.button-primary{color:#fff;background:linear-gradient(180deg,#1aa398,var(--primary));box-shadow:0 7px 17px #158f8633}.button-primary:hover{background:var(--primary-dark)}.button-secondary{color:var(--text-secondary);border-color:var(--border-strong);background:var(--surface)}.button-secondary:hover{background:var(--surface-soft)}.button-copy{min-height:32px;padding:6px 10px;color:var(--primary-dark);border-color:var(--border);background:var(--primary-soft);font-size:.7rem}.button-disabled{width:100%;color:var(--text-muted);background:#edf2f5;cursor:not-allowed}.alert{display:flex;gap:12px;margin-bottom:20px;padding:14px 16px;border-radius:var(--radius-md)}.alert-error{color:var(--danger);border:1px solid #f1c8c4;background:var(--danger-background)}.alert-icon{width:25px;height:25px;flex:0 0 auto;display:grid;place-items:center;border-radius:50%;color:#fff;background:var(--danger);font-size:.76rem;font-weight:800}.alert-title{display:block;margin-bottom:3px;font-size:.82rem;font-weight:750}.alert-message{font-size:.78rem}.site-footer{border-top:1px solid var(--border);background:#ffffffb8}.footer-inner{min-height:82px;display:flex;align-items:center;justify-content:space-between;gap:24px}.footer-brand{display:flex;flex-direction:column;gap:4px}.footer-title{font-size:.76rem;font-weight:750}.footer-text{color:var(--text-secondary);font-size:.68rem}.footer-links{display:flex;gap:17px}.footer-link{color:var(--text-secondary);text-decoration:none;font-size:.7rem}.footer-link:hover{color:var(--primary-dark)}@media(max-width:900px){.header-inner{flex-wrap:wrap;padding-block:14px}.main-nav{order:3;width:100%;overflow-x:auto}}@media(max-width:600px){.shell{width:calc(100% - 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