:root{--tos-accent:#4ec8ca;--tos-accent-rgb:78,200,202;--tos-dark-bg:#0a0e1a;--tos-card-bg:#0e1a2f;--tos-text:#fff;--tos-text-muted:hsla(0,0%,100%,.5);--tos-text-body:hsla(0,0%,100%,.78);--tos-border:hsla(0,0%,100%,.06)}.tos-page{min-height:100vh;background:var(--tos-dark-bg);color:var(--tos-text);font-family:var(--font),"Inter",sans-serif;overflow-x:hidden}.tos-nav{position:fixed;top:0;left:0;right:0;z-index:1000;display:flex;align-items:center;justify-content:space-between;padding:16px 48px;background:rgba(10,14,26,.85);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-bottom:1px solid hsla(0,0%,100%,.05);transition:background .3s}.tos-nav-logo img{height:36px;object-fit:contain}.tos-nav-back{display:flex;align-items:center;gap:8px;padding:8px 20px;border-radius:10px;background:rgba(78,200,202,.08);border:1px solid rgba(78,200,202,.2);color:var(--tos-accent);font-size:.85rem;font-weight:500;text-decoration:none;transition:all .3s}.tos-nav-back:hover{background:rgba(78,200,202,.15);border-color:rgba(78,200,202,.4);transform:translateX(-2px)}@keyframes tos-gradient-shift{0%,to{background-position:0 50%}50%{background-position:100% 50%}}.tos-hero{position:relative;display:flex;align-items:center;justify-content:center;text-align:center;padding:140px 24px 64px;background:linear-gradient(135deg,#0a0e1a,#0e1a2f 25%,#0a1628 50%,#0d1a30 75%,#0a0e1a);background-size:300% 300%;animation:tos-gradient-shift 12s ease infinite;overflow:hidden}.tos-hero:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 30% 40%,rgba(var(--tos-accent-rgb),.08) 0,transparent 50%),radial-gradient(circle at 70% 60%,rgba(var(--tos-accent-rgb),.05) 0,transparent 50%);pointer-events:none}.tos-hero-content{position:relative;z-index:2;max-width:700px}.tos-hero h1{font-family:var(--font-d),"Sora",sans-serif;font-size:3rem;font-weight:800;line-height:1.15;letter-spacing:-1.5px;margin:0 0 16px;background:linear-gradient(135deg,#fff 0,var(--tos-accent) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.tos-hero-subtitle{font-size:1.15rem;color:var(--tos-accent);font-weight:600;margin:0 0 8px;letter-spacing:1px;text-transform:uppercase}.tos-hero-date{font-size:.9rem;color:var(--tos-text-muted);margin:0}.tos-main{display:flex;max-width:1320px;margin:0 auto;padding:48px 24px 80px;gap:48px}.tos-sidebar{flex:0 0 280px;position:-webkit-sticky;position:sticky;top:90px;align-self:flex-start;max-height:calc(100vh - 110px);overflow-y:auto;padding-right:8px}.tos-sidebar::-webkit-scrollbar{width:4px}.tos-sidebar::-webkit-scrollbar-track{background:transparent}.tos-sidebar::-webkit-scrollbar-thumb{background:rgba(78,200,202,.2);border-radius:4px}.tos-toc-title{font-size:.75rem;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:var(--tos-accent);margin:0 0 16px;padding:0 12px}.tos-toc-list{list-style:none;padding:0;margin:0}.tos-toc-item{margin:0}.tos-toc-link{display:flex;align-items:baseline;gap:8px;padding:8px 12px;border-radius:8px;text-decoration:none;font-size:.8rem;line-height:1.4;color:var(--tos-text-muted);transition:all .25s ease;border-left:2px solid transparent;margin-left:0}.tos-toc-link:hover{color:hsla(0,0%,100%,.8);background:hsla(0,0%,100%,.03)}.tos-toc-link.active{color:var(--tos-accent);background:rgba(78,200,202,.06);border-left-color:var(--tos-accent);font-weight:600}.tos-toc-num{flex-shrink:0;font-size:.7rem;font-weight:700;color:inherit;opacity:.6;min-width:18px}.tos-toc-link.active .tos-toc-num{opacity:1}.tos-content{flex:1 1;min-width:0}.tos-section{background:var(--tos-card-bg);border:1px solid var(--tos-border);border-radius:16px;padding:40px;margin-bottom:28px;scroll-margin-top:100px;transition:border-color .3s}.tos-section:hover{border-color:rgba(78,200,202,.12)}.tos-section-header{display:flex;align-items:center;gap:14px;margin-bottom:24px}.tos-section-num{flex-shrink:0;width:36px;height:36px;display:flex;align-items:center;justify-content:center;background:rgba(78,200,202,.1);border:1px solid rgba(78,200,202,.2);border-radius:10px;font-size:.8rem;font-weight:700;color:var(--tos-accent)}.tos-section-title{font-family:var(--font-d),"Sora",sans-serif;font-size:1.35rem;font-weight:700;margin:0;color:var(--tos-text);line-height:1.3}.tos-section-body{font-size:.92rem;line-height:1.8;color:var(--tos-text-body)}.tos-section-body p{margin:0 0 16px}.tos-section-body p:last-child{margin-bottom:0}.tos-section-body strong{color:var(--tos-text);font-weight:600}.tos-section-body ol,.tos-section-body ul{margin:12px 0;padding-left:24px}.tos-section-body li{margin-bottom:8px}.tos-section-body a{color:var(--tos-accent);text-decoration:underline;text-underline-offset:2px}.tos-section-body a:hover{opacity:.8}.tos-highlight{color:var(--tos-text);font-weight:600;text-transform:uppercase;font-size:.88rem;letter-spacing:.3px}.tos-fab{display:none;position:fixed;bottom:24px;right:24px;z-index:999;width:52px;height:52px;border-radius:50%;background:var(--tos-accent);color:#0a0e1a;border:none;cursor:pointer;font-size:1.2rem;box-shadow:0 4px 20px rgba(78,200,202,.4);transition:transform .2s,box-shadow .2s;align-items:center;justify-content:center}.tos-fab:hover{transform:scale(1.08);box-shadow:0 6px 28px rgba(78,200,202,.5)}.tos-mobile-drawer{display:none;position:fixed;bottom:0;left:0;right:0;z-index:1001;background:var(--tos-card-bg);border-top:1px solid rgba(78,200,202,.2);border-radius:20px 20px 0 0;padding:20px 20px 32px;max-height:60vh;overflow-y:auto;transform:translateY(100%);transition:transform .35s cubic-bezier(.32,.72,0,1)}.tos-mobile-drawer.open{transform:translateY(0)}.tos-mobile-drawer-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--tos-border)}.tos-mobile-drawer-title{font-size:.85rem;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;color:var(--tos-accent)}.tos-mobile-drawer-close{background:none;border:none;color:var(--tos-text-muted);font-size:1.3rem;cursor:pointer;padding:4px}.tos-mobile-drawer-close:hover{color:var(--tos-text)}.tos-mobile-backdrop{display:none;position:fixed;inset:0;z-index:1000;background:rgba(0,0,0,.6);opacity:0;transition:opacity .3s}.tos-mobile-backdrop.open{opacity:1}.tos-footer{text-align:center;padding:40px 24px;border-top:1px solid var(--tos-border);color:var(--tos-text-muted);font-size:.82rem;line-height:1.7}@media (max-width:1024px){.tos-sidebar{display:none}.tos-main{padding:32px 16px 64px}.tos-fab{display:flex}.tos-mobile-drawer{display:block}.tos-mobile-backdrop{display:block;pointer-events:none}.tos-mobile-backdrop.open{pointer-events:auto}}@media (max-width:768px){.tos-nav{padding:14px 20px}.tos-nav-logo img{height:28px}.tos-nav-back{padding:6px 14px;font-size:.78rem}.tos-hero{padding:120px 20px 48px}.tos-hero h1{font-size:2rem}.tos-hero-subtitle{font-size:.95rem}.tos-section{padding:24px 20px;border-radius:12px;margin-bottom:20px}.tos-section-header{gap:10px;margin-bottom:18px}.tos-section-num{width:30px;height:30px;font-size:.7rem;border-radius:8px}.tos-section-title{font-size:1.1rem}.tos-section-body{font-size:.85rem;line-height:1.75}}@media (max-width:480px){.tos-hero h1{font-size:1.65rem}.tos-section{padding:20px 16px}}