:root{--primary-color: #6366f1;--primary-hover: #4f46e5;--primary-color-dark: #4f46e5;--secondary-color: #8b5cf6;--accent-color: #ec4899;--error-color: #ef4444;--error-hover: #dc2626;--text-primary: #1f2937;--text-secondary: #6b7280;--text-light: #9ca3af;--bg-primary: #ffffff;--bg-secondary: #f9fafb;--bg-dark: #111827;--border-color: #e5e7eb;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1);--font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;--font-mono: "SF Mono", Monaco, "Cascadia Code", monospace;--navbar-height: 70px;--container-width: 1200px;--container-padding: 20px;--vh: 1vh;--hero-height: 100vh;--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-base: .3s cubic-bezier(.4, 0, .2, 1);--transition-slow: .5s cubic-bezier(.4, 0, .2, 1)}.gpu-accelerated{transform:translateZ(0);backface-visibility:hidden}.content-auto{content-visibility:auto;contain-intrinsic-size:auto 500px}.layout-contained{contain:layout style}.fully-contained{contain:strict}.hidden{display:none!important}.visible-block{display:block!important}.visible-flex{display:flex!important}.visible-grid{display:grid!important}::-webkit-scrollbar{background-color:#f9fafb}::-webkit-scrollbar-thumb{background-color:#c1c1c1}::-webkit-scrollbar-thumb:hover{background-color:#a8a8a8}html{scrollbar-color:#c1c1c1 #f9fafb}*{margin:0;padding:0;box-sizing:border-box}html{font-size:16px}body{font-family:var(--font-primary);color:var(--text-primary);background-color:var(--bg-primary);line-height:1.6;min-height:100vh;display:flex;flex-direction:column}main{flex:1;padding-top:var(--navbar-height)}a{color:inherit;text-decoration:none;transition:color 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12px);left:0;min-width:120px;background:#ffffffd9;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid rgba(229,231,235,.8);border-radius:0 0 12px 12px;box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transform:translateY(-10px);transition:all .3s cubic-bezier(.4,0,.2,1);z-index:1000;list-style:none;padding:0;margin:0;max-height:0;overflow:hidden;transform-origin:top center}.dropdown-item:hover .dropdown-menu{opacity:1;visibility:visible;transform:translateY(0);max-height:200px;padding:8px 0}.dropdown-item-sub{margin:0}.dropdown-link{display:block;padding:10px 20px;color:var(--text-secondary);text-decoration:none;transition:all .2s ease;border-radius:0;position:relative;overflow:hidden;font-weight:500}.dropdown-link:after{content:"";position:absolute;left:10%;right:10%;bottom:0;height:3px;border-radius:2px;background:var(--primary-color);opacity:0;transform:scaleX(0);transition:all .28s cubic-bezier(.4,0,.2,1);pointer-events:none}.dropdown-link:hover:after{opacity:1;transform:scaleX(1)}.dropdown-link:hover{color:var(--primary-color);font-weight:700}.navbar-toggle{display:none;flex-direction:column;gap:4px;padding:8px;background:none;border:none;cursor:pointer}.toggle-bar{width:24px;height:2px;background:var(--text-primary);border-radius:2px;transition:all var(--transition-fast)}.mobile-sidebar{position:fixed;top:0;right:-100vw;width:100vw;height:100vh;background:var(--bg-primary);box-shadow:var(--shadow-xl);transition:right var(--transition-base);z-index:1100;overflow-y:auto;overflow-x:hidden;-webkit-overflow-scrolling:touch}.mobile-sidebar.active{right:0}.sidebar-header{display:flex;justify-content:space-between;align-items:center;padding:20px;border-bottom:1px solid 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