.landing-page{min-height:100vh;background:var(--page-gradient);position:relative}.page-grid{position:fixed;inset:0;z-index:0;pointer-events:none;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:72px 72px;mask-image:linear-gradient(180deg,rgba(0,0,0,0.55),transparent 82%)}[data-theme=light] .page-grid{background-image:linear-gradient(rgba(10,10,10,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(10,10,10,.045) 1px,transparent 1px)}.section-shell{width:min(1200px,calc(100% - 48px));margin:0 auto;position:relative;z-index:1}.navbar{position:sticky;top:0;z-index:100;height:var(--header-h);border-bottom:1px solid transparent;background:rgba(10,10,10,.86)}[data-theme=light] .navbar{background:rgba(251,247,242,.9)}.navbar.scrolled{border-bottom-color:var(--line)}.nav-container{width:min(1200px,calc(100% - 48px));height:100%;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:var(--space-6)}.logo{display:inline-flex;align-items:center;gap:var(--space-3);min-width:0}.logo-mark{display:inline-flex;align-items:center;justify-content:center;inline-size:42px;block-size:42px;border:1px solid var(--line-accent);border-radius:14px;background:linear-gradient(180deg,rgba(255,153,51,.16),rgba(255,255,255,0));color:var(--text);font-weight:800;letter-spacing:-.04em}.logo-mark.small{inline-size:34px;block-size:34px;border-radius:12px;font-size:.82rem}.logo-text-wrap{display:flex;flex-direction:column;min-width:0}.logo-text{font-size:1rem;font-weight:800;letter-spacing:-.03em}.logo-subtext{color:var(--text-soft);font-size:.74rem;font-weight:600}.nav-links{display:flex;align-items:center;gap:var(--space-2)}.nav-actions{display:flex;align-items:center;gap:var(--space-3)}.hero{padding:var(--space-12) 0 var(--space-20)}.hero-shell{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(320px,0.85fr);gap:var(--space-10);align-items:start}.about-copy,.about-note,.hero-copy,.hero-panel,.platform-copy,.trust-panel{min-width:0}.hero-copy{display:flex;flex-direction:column;gap:var(--space-6)}.hero-text{display:flex;flex-direction:column;gap:var(--space-4)}.eyebrow{color:var(--saffron);font-size:.84rem;font-weight:700;text-transform:uppercase;letter-spacing:.14em}.hero h1,.section-title{letter-spacing:-.05em;line-height:1.04}.hero h1{font-size:clamp(2.9rem, 4.8vw, 5.5rem);max-width:12ch}.about-copy p,.hero-subtitle,.section-subtitle,.section-text{color:var(--text-muted);font-size:1.02rem;line-height:1.75}.hero-actions{display:flex;align-items:center;gap:var(--space-4);flex-wrap:wrap}.hero-metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--space-3)}.hero-panel{position:sticky;top:calc(var(--header-h) + var(--space-6))}.about-note,.preview-frame,.trust-panel{border:1px solid var(--line);border-radius:var(--radius-xl);background:linear-gradient(180deg,rgba(255,255,255,.02),rgba(255,255,255,0)),var(--surface)}.preview-frame{padding:var(--space-6)}.preview-header{display:flex;justify-content:space-between;gap:var(--space-4);align-items:flex-start;margin-bottom:var(--space-6)}.preview-stack{display:grid;gap:var(--space-3)}.about-section,.features-section,.platform-section,.trust-section{padding:var(--space-20) 0}.section-heading{display:flex;flex-direction:column;gap:var(--space-4);max-width:760px;margin-bottom:var(--space-10)}.section-title{font-size:clamp(2rem, 3vw, 3.4rem)}.section-title.left{text-align:left}.features-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--space-4)}.about-grid,.footer-bottom,.footer-inner,.platform-grid,.trust-grid{display:grid;gap:var(--space-8)}.about-grid,.platform-grid,.trust-grid{grid-template-columns:repeat(2,minmax(0,1fr));align-items:start}.platform-rail{display:grid;gap:var(--space-4)}.landing-footer{padding:var(--space-16) 0 var(--space-8);border-top:1px solid var(--line)}.footer-inner{grid-template-columns:1.5fr 1fr 1fr;padding-bottom:var(--space-8);border-bottom:1px solid var(--line)}.footer-bottom{grid-template-columns:1fr auto;align-items:center;padding-top:var(--space-6)}.chat-app{display:flex;min-height:100vh;min-height:100dvh;background:linear-gradient(180deg,var(--bg-soft) 0,var(--bg) 14%,var(--bg) 100%)}.sidebar{width:var(--sidebar-w);border-right:1px solid var(--line);background:linear-gradient(180deg,rgba(255,153,51,.08),rgba(255,255,255,0) 16%),var(--bg-soft);display:flex;flex-direction:column;flex-shrink:0;min-width:0}.chat-header,.sidebar-header{min-height:var(--header-h);border-bottom:1px solid var(--line)}.sidebar-header{display:flex;align-items:center;justify-content:space-between;gap:var(--space-3);padding:0 var(--space-5)}.sidebar-top{padding:var(--space-4);display:grid;gap:var(--space-3)}.sidebar-footer{display:grid;gap:var(--space-2);padding:var(--space-4);border-top:1px solid var(--line)}.sidebar-overlay{position:fixed;inset:0;z-index:49;background:rgba(0,0,0,.56);display:none}.chat-main{flex:1;min-width:0;display:flex;flex-direction:column;position:relative;--chat-content-pad-inline:clamp(16px, 4vw, 36px)}.chat-header{display:grid;grid-template-columns:minmax(0,1fr) auto auto;align-items:center;gap:var(--space-4);padding:0 var(--chat-content-pad-inline);background:var(--panel)}.chat-header-left,.chat-header-right{display:flex;align-items:center;gap:var(--space-3);min-width:0}.chat-header-right{justify-content:flex-end}.chat-title-wrap{display:flex;flex-direction:column;min-width:0}.messages-area{flex:1;overflow-y:auto;overflow-x:hidden;padding:var(--space-8) var(--chat-content-pad-inline) var(--space-4);overscroll-behavior:contain}.messages-content{width:100%;display:flex;flex-direction:column}.conversation-column{width:min(var(--chat-content-max-w),100%);margin-inline:auto}.input-area{flex-shrink:0;padding:var(--space-4) var(--chat-content-pad-inline) var(--space-5);border-top:1px solid var(--line);background:var(--panel)}.input-wrap{width:100%}.scroll-bottom-btn{position:absolute;right:24px;bottom:126px;z-index:4}.workspace-page-body{background:var(--bg)}.workspace-shell{height:100vh;height:100dvh}.workspace-shell .sidebar{width:288px;background:var(--bg-soft)}.workspace-shell .chat-main{background:radial-gradient(circle at top,rgba(255,153,51,.06),transparent 24%),linear-gradient(180deg,var(--bg-soft) 0,var(--bg) 12%,var(--bg) 100%)}.workspace-shell .chat-header{grid-template-columns:minmax(0,1fr) auto auto;min-height:68px}.workspace-shell .messages-area{padding-top:28px;padding-bottom:24px}.workspace-shell .conversation-column{width:min(100%,880px)}.workspace-shell .input-area{padding-top:14px;padding-bottom:18px}.workspace-empty-shell{max-width:760px}