:root{--color-primary:#5e6ad2;--color-primary-hover:#828fff;--color-primary-deep:#4a52b8;--color-on-primary:#fff;--color-canvas:#010102;--color-surface-1:#0f1011;--color-surface-2:#141516;--color-surface-3:#18191a;--color-surface-4:#191a1b;--color-ink:#f7f8f8;--color-ink-muted:#d0d6e0;--color-ink-subtle:#8a8f98;--color-ink-tertiary:#62666d;--color-hairline:#23252a;--color-hairline-strong:#34343a;--color-hairline-tertiary:#3e3e44;--gradient-primary:linear-gradient(135deg, #667eea 0%, #764ba2 100%);--gradient-hero:linear-gradient(180deg, #0d1024 0%, #010102 100%);--gradient-glow:linear-gradient(135deg, #5e6ad2 0%, #818cf8 100%);--gradient-card:linear-gradient(135deg, #5e6ad226 0%, #764ba20d 100%);--glass-bg:#0f1011d9;--glass-bg-light:#0f101199;--glass-border:#ffffff14;--glass-border-strong:#ffffff24;--blur-sm:blur(8px);--blur-md:blur(12px);--blur-lg:blur(20px);--glow-primary:0 0 20px #5e6ad259;--glow-primary-sm:0 0 10px #5e6ad240;--glow-primary-lg:0 0 40px #5e6ad273;--glow-text:0 0 8px #5e6ad280;--grid-dot-color:#5e6ad21f;--grid-line-color:#5e6ad20f;--spacing-xs:4px;--spacing-sm:8px;--spacing-md:12px;--spacing-lg:16px;--spacing-xl:24px;--spacing-xxl:32px;--spacing-huge:64px;--radius-xs:4px;--radius-sm:6px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--radius-full:9999px;--shadow-sm:0 1px 3px #0000004d;--shadow-md:0 4px 12px #0006;--shadow-lg:0 8px 24px #00000080;--shadow-card:0 0 0 1px var(--color-hairline);--shadow-card-hover:0 0 0 1px var(--color-primary), var(--glow-primary-sm);--font-sans:"Inter", -apple-system, BlinkMacSystemFont, "PingFang SC", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-mono:ui-monospace, "SF Mono", Menlo, Monaco, Consolas, "Liberation Mono", monospace;--content-width-wide:1200px;--content-width-narrow:800px}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:var(--font-sans);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;color:var(--color-ink);background:var(--color-canvas);line-height:1.5}h1,h2,h3,h4,h5,h6{color:var(--color-ink);letter-spacing:-.02em;font-weight:600;line-height:1.3}h1{letter-spacing:-.04em;font-size:2rem;font-weight:600}h2{font-size:1.5rem;font-weight:600}h3{font-size:1.25rem;font-weight:600}a{color:var(--color-ink-muted);text-decoration:none;transition:color .2s}a:hover{color:var(--color-primary-hover)}code,pre{font-family:var(--font-mono)}pre{background:var(--color-surface-1);color:var(--color-ink);border-radius:var(--radius-sm);padding:1.5rem;line-height:1.6;overflow-x:auto}.btn{border-radius:var(--radius-md);cursor:pointer;font-size:.875rem;font-weight:500;font-family:var(--font-sans);border:none;justify-content:center;align-items:center;padding:10px 20px;line-height:1;transition:all .25s cubic-bezier(.4,0,.2,1);display:inline-flex;position:relative;overflow:hidden}.btn:before{content:"";opacity:0;background:linear-gradient(135deg,#ffffff1a 0%,#0000 100%);transition:opacity .2s;position:absolute;inset:0}.btn:hover:before{opacity:1}.btn-primary{background:var(--gradient-primary);color:var(--color-on-primary);box-shadow:var(--glow-primary-sm)}.btn-primary:hover{box-shadow:var(--glow-primary);transform:translateY(-1px)}.btn-primary:active{box-shadow:var(--glow-primary-sm);transform:translateY(0)scale(.98)}.btn-secondary{background:var(--color-surface-2);color:var(--color-ink);border:1px solid var(--glass-border)}.btn-secondary:hover{border-color:var(--glass-border-strong);background:var(--color-surface-3);box-shadow:var(--shadow-sm)}.card{background:var(--color-surface-1);border-radius:var(--radius-lg);border:1px solid var(--color-hairline);padding:var(--spacing-xl);transition:all .25s cubic-bezier(.4,0,.2,1)}.card:hover{border-color:var(--color-primary);box-shadow:var(--glow-primary-sm)}.card-gradient{background:var(--color-surface-1);border-radius:var(--radius-lg);padding:1px;position:relative}.card-gradient:before{content:"";border-radius:var(--radius-lg);background:var(--gradient-primary);-webkit-mask-composite:xor;opacity:0;padding:1px;transition:opacity .3s;position:absolute;inset:0;-webkit-mask-image:linear-gradient(#fff 0 0),linear-gradient(#fff 0 0);-webkit-mask-position:0 0,0 0;-webkit-mask-size:auto,auto;-webkit-mask-repeat:repeat,repeat;-webkit-mask-clip:content-box,border-box;-webkit-mask-origin:content-box,border-box;-webkit-mask-composite:xor;mask-composite:exclude;-webkit-mask-source-type:auto,auto;mask-mode:match-source,match-source}.card-gradient:hover:before{opacity:1}.card-gradient .card-inner{background:var(--color-surface-1);border-radius:calc(var(--radius-lg) - 1px);padding:var(--spacing-xl);height:100%}.tag,.badge{border-radius:var(--radius-full);padding:3px 10px;font-size:.75rem;font-weight:500;display:inline-block}.tag{background:var(--color-surface-3);color:var(--color-ink-muted);border:1px solid var(--color-hairline)}.badge{background:var(--gradient-primary);color:var(--color-on-primary);box-shadow:var(--glow-primary-sm)}.tag-level{border-radius:var(--radius-full);padding:3px 10px;font-size:.7rem;font-weight:500;display:inline-block}.tag-level.beginner{background:var(--color-surface-3);color:var(--color-ink-muted)}.tag-level.intermediate{color:var(--color-primary-hover);background:#5e6ad226;border:1px solid #5e6ad24d}.tag-level.advanced{color:#a78bfa;background:#764ba226;border:1px solid #764ba24d}.code-block{background:var(--color-surface-1);color:var(--color-ink);border-radius:var(--radius-sm);font-family:var(--font-mono);border:1px solid var(--color-hairline);padding:1.5rem;font-size:.875rem;line-height:1.6;overflow-x:auto}.code-block-terminal{color:#10b981;border-radius:var(--radius-md);padding:var(--spacing-lg);font-family:var(--font-mono);background:#0a0a0f;border:1px solid #10b98133;font-size:.8rem;line-height:1.7;overflow-x:auto;box-shadow:inset 0 0 30px #10b98108}.grid-bg{position:relative}.grid-bg:before{content:"";background-image:radial-gradient(circle at 1px 1px, var(--grid-dot-color) 1px, transparent 0), linear-gradient(var(--grid-line-color) 1px, transparent 1px), linear-gradient(90deg, var(--grid-line-color) 1px, transparent 1px);pointer-events:none;z-index:0;background-size:24px 24px,48px 48px,48px 48px;position:absolute;inset:0}.grid-bg>*{z-index:1;position:relative}.glass{background:var(--glass-bg);-webkit-backdrop-filter:var(--blur-md);border:1px solid var(--glass-border)}.glass-strong{background:var(--glass-bg);-webkit-backdrop-filter:var(--blur-lg);border:1px solid var(--glass-border-strong)}.text-glow{text-shadow:var(--glow-text)}.empty-state{text-align:center;padding:var(--spacing-xxl);color:var(--color-ink-subtle)}.page-container{background:var(--color-canvas);min-height:100vh}.content-wide{max-width:var(--content-width-wide);padding:0 var(--spacing-xl);margin:0 auto}.content-narrow{max-width:var(--content-width-narrow);padding:0 var(--spacing-xl);margin:0 auto}.text-center{text-align:center}.text-primary{color:var(--color-primary)}.text-secondary{color:var(--color-ink-muted)}.text-glow{color:var(--color-primary-hover);text-shadow:var(--glow-text)}@keyframes fadeIn{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse-glow{0%,to{box-shadow:var(--glow-primary-sm)}50%{box-shadow:var(--glow-primary)}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}.fade-in{animation:.4s ease-out fadeIn}.fade-in-up{animation:.5s ease-out fadeInUp}.shimmer{background:linear-gradient(90deg, var(--color-surface-1) 25%, var(--color-surface-2) 50%, var(--color-surface-1) 75%);background-size:200% 100%;animation:1.5s infinite shimmer}@media (width<=768px){:root{--spacing-lg:16px;--spacing-xl:20px;--spacing-xxl:28px;--content-width-wide:100%;--content-width-narrow:100%}h1{letter-spacing:-.03em;font-size:1.5rem}h2{font-size:1.25rem}h3{font-size:1.1rem}.btn{padding:10px 18px;font-size:.875rem}.content-wide,.content-narrow{padding:0 var(--spacing-lg)}}@media (width<=480px){:root{--spacing-md:12px;--spacing-lg:14px;--spacing-xl:18px;--spacing-xxl:24px}h1{font-size:1.35rem}h2{font-size:1.15rem}.btn{padding:10px 14px;font-size:.875rem}}#app{background:var(--color-canvas);min-height:100vh}.navbar{-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--color-hairline);z-index:100;background:#010102d9;height:64px;position:sticky;top:0}.navbar-content{max-width:var(--content-width-wide);padding:0 var(--spacing-xl);justify-content:space-between;align-items:center;height:100%;margin:0 auto;display:flex}.nav-logo{align-items:center;gap:var(--spacing-sm);text-decoration:none;display:flex}.logo-icon{filter:drop-shadow(0 0 8px #5e6ad280);font-size:1.5rem}.logo-text{color:var(--color-ink);letter-spacing:-.02em;font-size:1.2rem;font-weight:600}.desktop-links{gap:var(--spacing-xl);display:flex}.nav-link{color:var(--color-ink-muted);padding:var(--spacing-sm) 0;font-size:.9rem;font-weight:500;text-decoration:none;transition:color .2s;position:relative}.nav-link:after{content:"";background:var(--gradient-primary);border-radius:1px;width:0;height:2px;transition:width .25s cubic-bezier(.4,0,.2,1);position:absolute;bottom:0;left:50%;transform:translate(-50%)}.nav-link:hover{color:var(--color-ink)}.nav-link:hover:after,.nav-link.router-link-active:after{width:100%}.nav-link.router-link-active{color:var(--color-ink)}.menu-toggle{cursor:pointer;z-index:110;background:0 0;border:none;padding:8px;display:none}.menu-icon{background:var(--color-ink);width:22px;height:2px;transition:all .3s;display:block;position:relative}.menu-icon:before,.menu-icon:after{content:"";background:var(--color-ink);width:22px;height:2px;transition:all .3s;position:absolute}.menu-icon:before{top:-6px}.menu-icon:after{top:6px}.menu-toggle.active .menu-icon{background:0 0}.menu-toggle.active .menu-icon:before{top:0;transform:rotate(45deg)}.menu-toggle.active .menu-icon:after{top:0;transform:rotate(-45deg)}.mobile-menu{-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--color-hairline);padding:var(--spacing-md) var(--spacing-xl);background:#010102f2;display:none}.mobile-link{padding:var(--spacing-sm) 0;color:var(--color-ink-muted);border-radius:var(--radius-sm);border-bottom:1px solid var(--color-hairline);font-size:.95rem;font-weight:500;text-decoration:none;transition:color .2s;display:block}.mobile-link:last-child{border-bottom:none}.mobile-link:hover,.mobile-link.router-link-active{color:var(--color-ink)}@media (width<=768px){.navbar{height:56px}.menu-toggle{display:block}.desktop-links{display:none}.mobile-menu{gap:var(--spacing-xs);flex-direction:column;display:flex}.logo-text{font-size:1.1rem}}.site-footer{-webkit-backdrop-filter:blur(12px);border-top:1px solid var(--color-hairline);padding:var(--spacing-xl) var(--spacing-lg);text-align:center;color:var(--color-ink-muted);background:#010102d9}.footer-content{max-width:var(--content-width-wide);align-items:center;gap:var(--spacing-sm);flex-direction:column;margin:0 auto;display:flex}.footer-copyright{font-size:.85rem}.footer-beian{font-size:.8rem}.beian-link{color:var(--color-ink-muted);align-items:center;gap:4px;text-decoration:none;transition:color .2s;display:inline-flex}.beian-link:hover{color:var(--color-ink)}