:root{--font-size-base:14px;--bg-primary:#fafafa;--bg-primary-rgb:250, 250, 250;--bg-secondary:#f0f0f0;--bg-sidebar:#f5f5f5;--bg-card:#fff;--bg-card-rgb:255, 255, 255;--bg-card-hover:#fafafa;--bg-input:#fff;--bg-sidebar-surface:var(--bg-card);--bg-sidebar-surface-rgb:var(--bg-card-rgb);--bg-main-surface:var(--bg-card);--bg-main-surface-rgb:var(--bg-card-rgb);--border-color:#e0e0e0;--border-light:#ebebeb;--accent-primary:#333;--accent-hover:#1a1a1a;--accent-muted:#888;--text-primary:#1a1a1a;--text-secondary:#666;--text-muted:#999;--input-placeholder-color:var(--text-muted);--input-border-color:rgba(var(--accent-primary-rgb), .18);--input-border-hover-color:rgba(var(--accent-primary-rgb), .32);--input-border-focus-color:var(--accent-primary);--success:#2e7d32;--error:#c62828;--warning:#f57f17;--msg-user-bg:#f5f5f5;--msg-assistant-bg:#f5f5f5;--msg-system-border:#bdbdbd;--code-bg:#f4f4f4;--text-on-accent:#fff;--text-on-overlay:#fff;--accent-info:#4a90d9;--accent-primary-rgb:51, 51, 51;--accent-hover-rgb:26, 26, 26;--text-primary-rgb:26, 26, 26;--text-secondary-rgb:102, 102, 102;--text-muted-rgb:153, 153, 153;--success-rgb:46, 125, 50;--error-rgb:198, 40, 40;--warning-rgb:245, 127, 23;--accent-info-rgb:74, 144, 217}.dark{--bg-primary:#1a1a1a;--bg-primary-rgb:26, 26, 26;--bg-secondary:#252525;--bg-sidebar:#202020;--bg-card:#2a2a2a;--bg-card-rgb:42, 42, 42;--bg-card-hover:#333;--bg-input:#2a2a2a;--bg-sidebar-surface:var(--bg-primary);--bg-sidebar-surface-rgb:var(--bg-primary-rgb);--bg-main-surface:var(--bg-primary);--bg-main-surface-rgb:var(--bg-primary-rgb);--border-color:#3a3a3a;--border-light:#333;--accent-primary:#e0e0e0;--accent-hover:#f5f5f5;--accent-muted:#888;--text-primary:#e0e0e0;--text-secondary:#a0a0a0;--text-muted:#888;--success:#66bb6a;--error:#ef5350;--warning:#ffb74d;--msg-user-bg:#292929;--msg-assistant-bg:#292929;--msg-system-border:#555;--code-bg:#1e1e1e;--text-on-accent:#1a1a1a;--text-on-overlay:#fff;--accent-info:#6ba3d6;--accent-primary-rgb:224, 224, 224;--accent-hover-rgb:245, 245, 245;--text-primary-rgb:224, 224, 224;--text-secondary-rgb:160, 160, 160;--text-muted-rgb:136, 136, 136;--success-rgb:102, 187, 106;--error-rgb:239, 83, 80;--warning-rgb:255, 183, 77;--accent-info-rgb:107, 163, 214}.comic{--border-color:#1a1a1a;--border-light:#555;--msg-system-border:#1a1a1a;--font-ui:"Comic Neue", "ZCOOL KuaiLe", "Zen Maru Gothic", "Gaegu", cursive, sans-serif;--comic-border-width:2.5px;--comic-shadow:3px 3px 0px #00000026}.dark.comic{--border-color:#666;--border-light:#555;--msg-system-border:#888;--comic-shadow:3px 3px 0px #ffffff14}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;font-size:14px;line-height:1.6}body{background:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Noto Sans,Ubuntu,Cantarell,Helvetica Neue,sans-serif}a{color:var(--accent-primary);text-decoration:none}a:hover{color:var(--accent-hover)}code{background:var(--code-bg);border-radius:6px;padding:2px 6px;font-family:JetBrains Mono,Fira Code,Consolas,monospace;font-size:.9em}pre code{border-radius:10px;padding:16px;display:block;overflow-x:auto}.section{max-width:1120px;margin:0 auto;padding:80px 24px}@media (max-width:768px){.section{padding:48px 16px}}.section-title{text-align:center;color:var(--text-primary);margin-bottom:16px;font-size:32px;font-weight:700}@media (max-width:768px){.section-title{font-size:24px}}.section-desc{text-align:center;color:var(--text-secondary);max-width:640px;margin:0 auto 48px;font-size:16px}.reveal{opacity:0;transition:opacity .6s,transform .6s;transform:translateY(24px)}.reveal.revealed{opacity:1;transform:translateY(0)}.reveal-delay-1{transition-delay:80ms}.reveal-delay-2{transition-delay:.16s}.reveal-delay-3{transition-delay:.24s}.reveal-delay-4{transition-delay:.32s}@keyframes fade-in-up{0%{opacity:0;transform:translateY(32px)}to{opacity:1;transform:translateY(0)}}@keyframes fade-in{0%{opacity:0}to{opacity:1}}@keyframes pulse-border{0%,to{border-color:var(--border-color)}50%{border-color:var(--text-muted)}}.animate-fade-in-up{animation:.7s both fade-in-up}.animate-fade-in{animation:.5s both fade-in}.animate-delay-1{animation-delay:.1s}.animate-delay-2{animation-delay:.2s}.animate-delay-3{animation-delay:.3s}.animate-delay-4{animation-delay:.4s}.animate-delay-5{animation-delay:.5s}