@import"https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap";@import"https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&display=swap";:root{--carbon-black: #0a0a0a;--carbon-dark: #1a1a1a;--carbon-medium: #2a2a2a;--carbon-light: #3a3a3a;--carbon-gray: #666666;--carbon-light-gray: #999999;--carbon-accent: #007acc;--carbon-accent-hover: #005a9e;--carbon-white: #f5f5f5;--font-family: "Inter", system-ui, -apple-system, sans-serif;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--font-size-2xl: 1.5rem;--font-size-3xl: 1.875rem;--font-size-4xl: 2.25rem;--spacing-1: .25rem;--spacing-2: .5rem;--spacing-3: .75rem;--spacing-4: 1rem;--spacing-6: 1.5rem;--spacing-8: 2rem;--spacing-12: 3rem;--spacing-16: 4rem;--spacing-20: 5rem;--radius-sm: .25rem;--radius: .5rem;--radius-md: .75rem;--radius-lg: 1rem;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .5);--shadow: 0 2px 4px rgba(0, 0, 0, .3);--shadow-md: 0 4px 8px rgba(0, 0, 0, .25);--shadow-lg: 0 8px 16px rgba(0, 0, 0, .2)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:var(--font-family);background-color:var(--carbon-black);color:var(--carbon-white);line-height:1.6;overflow-x:hidden}.app{min-height:100vh;display:flex;flex-direction:column}.carbon-fiber{background-image:radial-gradient(circle at 1px 1px,var(--carbon-gray) 1px,transparent 0),linear-gradient(45deg,var(--carbon-dark) 25%,transparent 25%),linear-gradient(-45deg,var(--carbon-dark) 25%,transparent 25%),linear-gradient(45deg,transparent 75%,var(--carbon-medium) 75%),linear-gradient(-45deg,transparent 75%,var(--carbon-medium) 75%);background-size:4px 4px,16px 16px,16px 16px,16px 16px,16px 16px;background-position:0 0,0 0,0 0,8px 8px,8px 8px}.header{background:linear-gradient(135deg,var(--carbon-black),var(--carbon-dark));position:relative;height:200px;display:flex;align-items:center;padding:0 var(--spacing-8);box-shadow:var(--shadow-lg);overflow:hidden}.header:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;opacity:.3;z-index:1;background-image:repeating-linear-gradient(45deg,transparent,transparent 2px,var(--carbon-gray) 2px,var(--carbon-gray) 4px),repeating-linear-gradient(-45deg,transparent,transparent 2px,var(--carbon-light) 2px,var(--carbon-light) 4px)}.header-content{position:relative;z-index:2;display:flex;align-items:center;width:100%;max-width:1200px;margin:0 auto}.logo-placeholder{width:250px;height:120px;display:flex;align-items:center;justify-content:center;margin-right:var(--spacing-6)}.logo-image{width:100%;height:100%;object-fit:contain;filter:brightness(.9)}.header-title{font-family:Orbitron,monospace;font-size:4.5rem;font-weight:900;letter-spacing:.1em;background:linear-gradient(135deg,#fff,#e0e0e0,#fff);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;text-shadow:0 0 30px rgba(255,255,255,.2);text-transform:uppercase}.navigation{background-color:var(--carbon-dark);border-bottom:1px solid var(--carbon-medium);position:sticky;top:0;z-index:100}.nav-content{max-width:1200px;margin:0 auto;padding:0 var(--spacing-8)}.nav-list{display:flex;align-items:center;gap:var(--spacing-2);padding:var(--spacing-4) 0;justify-content:flex-start}.nav-item{list-style:none}.nav-link{display:block;padding:var(--spacing-3) var(--spacing-6);color:#d1d5db;background-color:var(--carbon-light);text-decoration:none;font-weight:500;border-radius:var(--radius);border:1px solid var(--carbon-gray);transition:all .2s ease;position:relative;overflow:hidden}.nav-link:hover{background-color:var(--carbon-medium);color:var(--carbon-white);border-color:var(--carbon-accent);transform:translateY(-1px);box-shadow:var(--shadow)}.nav-link.active{background-color:var(--carbon-accent);color:var(--carbon-white);border-color:var(--carbon-accent);font-weight:600;box-shadow:var(--shadow-md)}.nav-link:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.1),transparent);transition:left .5s ease}.nav-link:hover:before{left:100%}.nav-item:last-child{margin-left:auto}.seafile-link{background:linear-gradient(135deg,#2d4a5c,#1e3540);color:var(--carbon-white)!important;font-weight:600;border:1px solid #3a5a6b}.seafile-link:hover{background:linear-gradient(135deg,#3a5a6b,#2d4a5c);border-color:var(--carbon-accent);transform:translateY(-2px);box-shadow:var(--shadow-md)}.main-content{flex:1;max-width:1200px;margin:0 auto;padding:var(--spacing-8);width:100%}.page-content{background-color:var(--carbon-dark);border-radius:var(--radius-lg);padding:var(--spacing-8);box-shadow:var(--shadow-lg);position:relative;overflow:hidden}.page-content:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--carbon-accent),var(--carbon-gray),var(--carbon-accent))}.page-title{font-size:var(--font-size-3xl);font-weight:700;margin-bottom:var(--spacing-6);color:var(--carbon-white);position:relative}.page-title:after{content:"";position:absolute;bottom:-8px;left:0;width:60px;height:2px;background:var(--carbon-accent)}.page-section{margin-bottom:var(--spacing-8)}.section-title{font-size:var(--font-size-xl);font-weight:600;margin-bottom:var(--spacing-4);color:var(--carbon-light-gray)}.section-content{color:var(--carbon-light-gray);line-height:1.7}.section-content p{margin-bottom:var(--spacing-4)}.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:var(--spacing-6);margin-top:var(--spacing-8)}.feature-card{background-color:var(--carbon-medium);border-radius:var(--radius);padding:var(--spacing-6);border:1px solid var(--carbon-light);transition:all .3s ease}.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--carbon-accent)}.feature-title{font-size:var(--font-size-lg);font-weight:600;margin-bottom:var(--spacing-3);color:var(--carbon-white)}.feature-description{color:var(--carbon-light-gray);font-size:var(--font-size-sm)}.feature-card-link{text-decoration:none;color:inherit;cursor:pointer;position:relative;overflow:hidden}.feature-card-link:before{content:"";position:absolute;top:var(--spacing-3);right:var(--spacing-3);width:24px;height:24px;background:var(--carbon-accent);border-radius:50%;opacity:0;transition:all .3s ease;transform:translateY(-10px);display:flex;align-items:center;justify-content:center}.feature-card-link:after{content:"↗";position:absolute;top:var(--spacing-3);right:var(--spacing-3);width:24px;height:24px;color:var(--carbon-white);font-size:12px;font-weight:700;opacity:0;transition:all .3s ease;transform:translateY(-10px);display:flex;align-items:center;justify-content:center;z-index:1}.feature-card-link:hover:before{opacity:1;transform:translateY(0)}.feature-card-link:hover:after{opacity:1;transform:translateY(0)}.feature-card-link:hover{transform:translateY(-6px);box-shadow:0 12px 24px #007acc4d;border-color:var(--carbon-accent)}.feature-card-link:hover .feature-title{color:var(--carbon-accent)}.feature-card-disabled{opacity:.6;cursor:not-allowed}.feature-card-disabled:hover{transform:none;box-shadow:var(--shadow);border-color:var(--carbon-light)}.footer{background-color:var(--carbon-dark);border-top:1px solid var(--carbon-medium);padding:var(--spacing-8);text-align:center;color:var(--carbon-gray);margin-top:auto}@media (max-width: 768px){.header{height:120px;padding:var(--spacing-2) var(--spacing-4)}.header-content{flex-direction:row;align-items:center;justify-content:flex-start;gap:var(--spacing-3)}.logo-placeholder{width:40px;height:30px;margin-right:var(--spacing-3)}.header-title{font-size:2rem;line-height:1.1}.nav-content{padding:0 var(--spacing-4)}.nav-list{flex-wrap:wrap}.main-content{padding:var(--spacing-4)}.page-content{padding:var(--spacing-6)}.feature-grid{grid-template-columns:1fr}}@media (max-width: 480px){.header{height:100px;padding:var(--spacing-2)}.logo-placeholder{width:35px;height:25px;margin-right:var(--spacing-2)}.header-title{font-size:1.5rem;line-height:1;letter-spacing:.05em}.page-title{font-size:var(--font-size-2xl)}.nav-list{flex-direction:column;align-items:stretch;gap:var(--spacing-2)}.nav-item{width:100%}.nav-item:last-child{margin-left:0;margin-top:0}.nav-link{width:100%;text-align:center;justify-content:center;display:flex;align-items:center}.seafile-link{margin-left:0;width:100%;text-align:center;justify-content:center;display:flex;align-items:center}}@media (max-width: 360px){.header{height:80px;padding:var(--spacing-1)}.header-content{gap:var(--spacing-2)}.logo-placeholder{width:30px;height:20px;margin-right:var(--spacing-1)}.header-title{font-size:1.2rem;letter-spacing:.02em}}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:fadeIn .6s ease-out}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--carbon-dark)}::-webkit-scrollbar-thumb{background:var(--carbon-gray);border-radius:var(--radius-sm)}::-webkit-scrollbar-thumb:hover{background:var(--carbon-light-gray)}