:root{--bg-main: #f5f6fa;--bg-card: #ffffff;--bg-sidebar: #ffffff;--bg-hover: #f0f2f5;--text-main: #1d1d1f;--text-secondary: #86868b;--text-muted: #a1a1a6;--accent: #0066cc;--accent-light: #e6f0fa;--border: #e5e5e5;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .05), 0 2px 4px -1px rgba(0, 0, 0, .03);--shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, .08), 0 4px 6px -2px rgba(0, 0, 0, .04);--hero-bg: linear-gradient(135deg, #0062E6, #33AEFF);--header-height: 60px;--sidebar-width: 260px}body.dark{--bg-main: #121212;--bg-card: #1e1e1e;--bg-sidebar: #1e1e1e;--bg-hover: #2c2c2e;--text-main: #f5f5f7;--text-secondary: #a1a1a6;--text-muted: #6e6e73;--accent: #2997ff;--accent-light: rgba(41, 151, 255, .15);--border: #333336;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .2);--shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, .4);--hero-bg: linear-gradient(135deg, #0d326b, #185a9d)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg-main);background-image:radial-gradient(var(--border) 1px,transparent 0);background-size:20px 20px;color:var(--text-main);line-height:1.5;transition:background-color .3s,color .3s}a{text-decoration:none;color:inherit}#app{display:flex;min-height:100vh}#sidebar{width:var(--sidebar-width);background-color:var(--bg-sidebar);border-right:1px solid var(--border);display:flex;flex-direction:column;position:fixed;top:0;bottom:0;left:0;z-index:100;transition:transform .3s ease}.sidebar-header{height:var(--header-height);display:flex;align-items:center;justify-content:space-between;padding:0 20px;border-bottom:1px solid var(--border)}.logo{display:flex;align-items:center;gap:10px;color:var(--accent)}.logo h1{font-size:1.25rem;font-weight:600;color:var(--text-main)}#close-sidebar-btn{display:none;background:none;border:none;color:var(--text-secondary);cursor:pointer}#category-nav{flex:1;overflow-y:auto;padding:20px 0}.nav-item{display:flex;align-items:center;padding:10px 20px;margin:0 10px 4px;border-radius:8px;cursor:pointer;color:var(--text-main);transition:background-color .2s,color .2s;font-size:.95rem}.nav-item:hover{background-color:var(--bg-hover)}.nav-item.active{background-color:var(--accent-light);color:var(--accent);font-weight:500}.nav-icon{margin-right:12px;font-size:1.1rem}.sidebar-footer{padding:20px;border-top:1px solid var(--border)}.sidebar-footer a{display:flex;align-items:center;gap:8px;color:var(--text-secondary);font-size:.9rem;transition:color .2s}.sidebar-footer a:hover{color:var(--text-main)}main{flex:1;margin-left:var(--sidebar-width);min-width:0;display:flex;flex-direction:column}header{height:var(--header-height);background-color:rgba(var(--bg-main),.8);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);position:sticky;top:0;z-index:50;display:flex;align-items:center;justify-content:space-between;padding:0 24px;border-bottom:1px solid var(--border)}.header-left{display:flex;align-items:center;gap:16px}#menu-btn{display:none;background:none;border:none;color:var(--text-main);cursor:pointer;padding:0}.mobile-title{display:none;font-size:1.2rem;font-weight:600}.header-right{display:flex;align-items:center;gap:16px;margin-left:auto}.search-box{display:flex;align-items:center;background-color:var(--bg-card);border:1px solid var(--border);border-radius:20px;padding:6px 16px;width:260px;transition:border-color .2s}.search-box:focus-within{border-color:var(--accent)}.search-box svg{color:var(--text-secondary);margin-right:8px}#search-input{border:none;background:transparent;outline:none;width:100%;color:var(--text-main);font-size:.9rem}#theme-toggle{background:none;border:none;color:var(--text-secondary);cursor:pointer;display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;transition:background-color .2s}#theme-toggle:hover{background-color:var(--bg-hover);color:var(--text-main)}body.dark .moon-icon{display:none}body:not(.dark) .sun-icon{display:none}.hero{background:linear-gradient(120deg,#0f172a,#1d4ed8,#0ea5e9);background-size:200% auto;animation:gradientFlow 15s ease infinite;color:#fff;padding:80px 24px;text-align:center;position:relative;overflow:hidden;border-bottom:1px solid rgba(255,255,255,.1);box-shadow:inset 0 -10px 30px #0000001a}body.dark .hero{background:linear-gradient(120deg,#020617,#1e3a8a,#0369a1);background-size:200% auto;border-bottom:1px solid rgba(0,0,0,.5)}@keyframes gradientFlow{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 50%}}.hero:after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.15) 1px,transparent 1px);background-size:24px 24px;z-index:1}.hero-title{font-size:2.8rem;font-weight:800;margin-bottom:16px;position:relative;z-index:2;text-shadow:0 4px 20px rgba(0,0,0,.3);letter-spacing:-.5px}.hero-subtitle{font-size:1.25rem;opacity:.9;position:relative;z-index:2;font-weight:300;text-shadow:0 2px 10px rgba(0,0,0,.2)}.bulletin{background-color:var(--bg-card);padding:12px 24px;display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--border);font-size:.9rem;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}.bulletin-text-container{overflow:hidden;white-space:nowrap;flex:1}#bulletin-text{display:inline-block}#content-container{padding:32px}.category-section{margin-bottom:40px}.category-title{font-size:1.5rem;font-weight:700;margin-bottom:24px;color:var(--text-main);display:flex;align-items:center;gap:10px;position:relative;padding-left:14px}.category-title:before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:4px;height:20px;background:var(--accent);border-radius:4px}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px}.card{background-color:rgba(var(--bg-card),.7);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid var(--border);border-radius:16px;padding:20px;transition:all .3s cubic-bezier(.25,.8,.25,1);display:flex;flex-direction:column;position:relative;overflow:hidden}.card:before{content:"";position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(135deg,#ffffff1a,#fff0);z-index:0;pointer-events:none}body.dark .card:before{background:linear-gradient(135deg,#ffffff0d,#fff0)}.card:hover{transform:translateY(-5px) scale(1.02);box-shadow:var(--shadow-hover);border-color:var(--accent);background-color:var(--bg-card)}.card:after{content:"";position:absolute;bottom:0;left:0;width:100%;height:4px;background:var(--hero-bg);opacity:0;transition:opacity .3s}.card:hover:after{opacity:1}.card-header{display:flex;align-items:center;gap:14px;margin-bottom:12px;position:relative;z-index:1}.card-icon{width:48px;height:48px;border-radius:50%;background-color:var(--accent-light);color:var(--accent);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.4rem;flex-shrink:0;overflow:hidden;box-shadow:0 4px 10px #0000001a}.card-icon img{width:100%;height:100%;object-fit:cover}.card-title-wrap{flex:1;min-width:0}.card-title{font-size:1.1rem;font-weight:700;margin-bottom:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--text-main);transition:color .2s}.card:hover .card-title{color:var(--accent)}.card-meta{display:flex;align-items:center;gap:8px;font-size:.8rem;color:var(--text-secondary)}.tag{background-color:var(--bg-main);padding:3px 8px;border-radius:12px;font-weight:500;border:1px solid var(--border)}.card-desc{font-size:.9rem;color:var(--text-secondary);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;flex:1;position:relative;z-index:1}.card-link{position:absolute;top:0;left:0;width:100%;height:100%;z-index:10}.empty-state{text-align:center;padding:60px 20px;color:var(--text-secondary)}.loading{text-align:center;padding:60px 20px;color:var(--text-secondary);font-size:1.1rem}#sidebar-overlay{display:none;position:fixed;inset:0;background-color:#00000080;z-index:90;backdrop-filter:blur(2px);-webkit-backdrop-filter:blur(2px)}@media(max-width:1100px){.grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:768px){#sidebar{transform:translate(-100%)}#sidebar.open{transform:translate(0)}#close-sidebar-btn{display:block}main{margin-left:0}#menu-btn,.mobile-title{display:block}.header-right{flex:1;justify-content:flex-end}.search-box{display:none}.grid{grid-template-columns:1fr}.hero{padding:30px 20px}.hero-title{font-size:1.5rem}#sidebar-overlay.open{display:block}}.site-footer{margin-top:60px;padding:40px 24px;border-top:1px solid var(--border);background:var(--bg-card);text-align:center}.footer-content{max-width:800px;margin:0 auto;font-size:.85rem;color:var(--text-secondary);line-height:1.6}.footer-content p{margin-bottom:12px}.footer-content strong{color:var(--text-main)}.footer-copyright{margin-top:20px;font-size:.75rem;opacity:.7}.back-to-top{position:fixed;bottom:30px;right:30px;width:50px;height:50px;border-radius:50%;background:var(--card-bg);border:1px solid var(--border-color);color:var(--text-color);display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 4px 15px #0000001a;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);opacity:0;visibility:hidden;transform:translateY(20px);transition:all .3s ease;z-index:99}body.dark .back-to-top{box-shadow:0 4px 15px #0000004d}.back-to-top.show{opacity:1;visibility:visible;transform:translateY(0)}.back-to-top:hover{background:var(--accent-color);color:#fff;border-color:var(--accent-color)}.toast{position:fixed;bottom:100px;left:50%;transform:translate(-50%) translateY(20px);background:var(--text-color);color:var(--bg-color);padding:12px 24px;border-radius:8px;font-size:.95rem;font-weight:500;opacity:0;visibility:hidden;transition:all .3s cubic-bezier(.68,-.55,.265,1.55);z-index:1000;box-shadow:0 10px 30px #0003}.toast.show{opacity:1;visibility:visible;transform:translate(-50%) translateY(0)}.highlight{background-color:#ffeb3b66;color:inherit;border-radius:2px;padding:0 2px}body.dark .highlight{background-color:#ffd54f4d}.skeleton-wrapper{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px}.skeleton-card{background:var(--card-bg);border:1px solid var(--border-color);border-radius:16px;padding:20px;display:flex;flex-direction:column}.skeleton{background:linear-gradient(90deg,var(--bg-hover) 25%,var(--border-color) 50%,var(--bg-hover) 75%);background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:4px}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}.skeleton-header{display:flex;align-items:center;gap:10px;margin-bottom:10px}.skeleton-avatar{width:40px;height:40px;border-radius:8px;flex-shrink:0}.skeleton-title-wrap{flex:1}.skeleton-title{width:72%;height:14px;margin-bottom:6px}.skeleton-meta{width:40%;height:11px}.skeleton-line{width:100%;height:11px;margin-bottom:7px}.skeleton-line:last-child{width:76%}.avatar-color-0{background:#e3f2fd;color:#1976d2}.avatar-color-1{background:#fce4ec;color:#c2185b}.avatar-color-2{background:#e8f5e9;color:#388e3c}.avatar-color-3{background:#fff3e0;color:#f57c00}.avatar-color-4{background:#f3e5f5;color:#7b1fa2}.avatar-color-5{background:#e0f7fa;color:#0097a7}body.dark .avatar-color-0{background:#1976d233;color:#90caf9}body.dark .avatar-color-1{background:#c2185b33;color:#f48fb1}body.dark .avatar-color-2{background:#388e3c33;color:#a5d6a7}body.dark .avatar-color-3{background:#f57c0033;color:#ffcc80}body.dark .avatar-color-4{background:#7b1fa233;color:#ce93d8}body.dark .avatar-color-5{background:#0097a733;color:#80deea}.card-copy-btn{position:absolute;top:15px;right:15px;width:30px;height:30px;border-radius:50%;background:var(--bg-hover);border:none;color:var(--text-secondary);display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:15;opacity:0;transform:scale(.8);transition:all .2s}.card:hover .card-copy-btn{opacity:1;transform:scale(1)}.card-copy-btn:hover{background:var(--accent-light);color:var(--accent)}#progress-container{position:sticky;top:var(--header-height);left:0;width:100%;height:3px;background:transparent;z-index:49}#progress-bar{height:100%;background:var(--accent-color, #2997ff);width:0%;transition:width .1s ease-out}body.dark .card{transition:all .3s cubic-bezier(.25,.8,.25,1),box-shadow .3s ease,border-color .3s ease}body.dark .card:hover{border-color:#fff3}body.dark .card:hover:has(.avatar-color-0){box-shadow:0 0 20px #90caf926,inset 0 0 10px #90caf90d;border-color:#90caf94d}body.dark .card:hover:has(.avatar-color-1){box-shadow:0 0 20px #f48fb126,inset 0 0 10px #f48fb10d;border-color:#f48fb14d}body.dark .card:hover:has(.avatar-color-2){box-shadow:0 0 20px #a5d6a726,inset 0 0 10px #a5d6a70d;border-color:#a5d6a74d}body.dark .card:hover:has(.avatar-color-3){box-shadow:0 0 20px #ffcc8026,inset 0 0 10px #ffcc800d;border-color:#ffcc804d}body.dark .card:hover:has(.avatar-color-4){box-shadow:0 0 20px #ce93d826,inset 0 0 10px #ce93d80d;border-color:#ce93d84d}body.dark .card:hover:has(.avatar-color-5){box-shadow:0 0 20px #80deea26,inset 0 0 10px #80deea0d;border-color:#80deea4d}.card{position:relative;overflow:hidden}.card .ripple{position:absolute;border-radius:50%;transform:scale(0);animation:ripple .6s linear;background-color:#2997ff26;pointer-events:none}body.dark .card .ripple{background-color:#ffffff1a}@keyframes ripple{to{transform:scale(4);opacity:0}}.submit-btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:12px;background:linear-gradient(135deg,var(--accent),#8b5cf6);color:#fff;border-radius:12px;font-weight:600;transition:all .3s ease;box-shadow:0 4px 15px #2997ff4d}.sidebar-footer .submit-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px #2997ff66;opacity:.95;color:#fff}.like-btn{display:inline-flex;align-items:center;gap:4px;background:transparent;border:none;color:var(--text-secondary);font-size:.85rem;cursor:pointer;padding:2px 6px;border-radius:10px;transition:all .2s ease;margin-left:auto}.like-btn:hover{background:var(--bg-hover);color:#ef4444}.like-btn.liked{color:#ef4444}.like-btn.liked svg{fill:#ef4444;stroke:#ef4444}.like-animation{animation:pop .4s ease}@keyframes pop{0%{transform:scale(1)}50%{transform:scale(1.4)}to{transform:scale(1)}}