:root{--font-main:'Inter',-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;--bg-primary:#f4f6f8;--bg-surface:#ffffff;--bg-subtle:#f0f3f6;--bg-card:#ffffff;--bg-hover:#eef2f6;--text-main:#1e293b;--text-muted:#64748b;--text-subtle:#94a3b8;--primary:#0284c7;--primary-hover:#0369a1;--primary-light:#e0f2fe;--primary-border:#bae6fd;--accent:#10b981;--accent-light:#d1fae5;--danger:#ef4444;--danger-light:#fee2e2;--warning:#f59e0b;--border-color:#e2e8f0;--border-subtle:#f1f5f9;--quote-bg:#f8fafc;--quote-border:#94a3b8;--header-bg:#0f172a;--header-text:#ffffff;--shadow-sm:0 1px 2px 0 rgb(0 0 0 / 0.05);--shadow-md:0 4px 6px -1px rgb(0 0 0 / 0.1),0 2px 4px -2px rgb(0 0 0 / 0.1);--shadow-lg:0 10px 15px -3px rgb(0 0 0 / 0.1),0 4px 6px -4px rgb(0 0 0 / 0.1);--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-full:9999px;--app-max-width:860px}[data-theme="dark"]{--bg-primary:#0b1120;--bg-surface:#1e293b;--bg-subtle:#182234;--bg-card:#1e293b;--bg-hover:#273549;--text-main:#f1f5f9;--text-muted:#94a3b8;--text-subtle:#64748b;--primary:#38bdf8;--primary-hover:#7dd3fc;--primary-light:#0c4a6e;--primary-border:#0369a1;--border-color:#334155;--border-subtle:#1e293b;--quote-bg:#151e2e;--quote-border:#475569;--header-bg:#090e1a;--header-text:#f8fafc;--shadow-sm:0 1px 2px 0 rgb(0 0 0 / 0.3);--shadow-md:0 4px 6px -1px rgb(0 0 0 / 0.3);--shadow-lg:0 10px 15px -3px rgb(0 0 0 / 0.4)}*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}body{font-family:var(--font-main);background-color:var(--bg-primary);color:var(--text-main);line-height:1.5;font-size:15px;min-height:100vh;-webkit-font-smoothing:antialiased}a{color:var(--primary);text-decoration:none;transition:color 0.15s ease}a:hover{text-decoration:underline}img{max-width:100%;height:auto;display:inline-block}button,input,textarea{font-family:inherit;font-size:inherit}.hidden{display:none !important}#app{display:flex;flex-direction:column;min-height:100vh}.main-container{flex:1;width:100%;max-width:var(--app-max-width);margin:0 auto;padding:12px 12px 32px 12px}.app-header{position:sticky;top:0;z-index:100;background-color:var(--header-bg);color:var(--header-text);box-shadow:var(--shadow-md);border-bottom:1px solid rgba(255,255,255,0.08)}.header-content{display:flex;align-items:center;justify-content:space-between;max-width:var(--app-max-width);margin:0 auto;padding:10px 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var(--border-color);gap:8px}.post-author-wrap{display:flex;align-items:center;gap:10px}.post-avatar{width:38px;height:38px;border-radius:var(--radius-full);object-fit:cover;background-color:#cbd5e1;flex-shrink:0}.post-author-details{display:flex;flex-direction:column}.post-author-name{font-size:14px;font-weight:700;color:var(--text-main);display:flex;align-items:center;gap:6px}.post-flag{width:14px;height:10px;vertical-align:middle}.post-author-meta{font-size:11px;color:var(--text-muted);display:flex;gap:6px}.post-rank-badge{color:var(--primary);font-weight:600}.post-meta-right{display:flex;flex-direction:column;align-items:flex-end;gap:2px}.post-date{font-size:12px;color:var(--text-muted)}.post-id-badge{font-size:11px;color:var(--text-subtle)}.post-likes-badge{background-color:var(--accent-light);color:#065f46;font-size:11px;font-weight:600;padding:1px 6px;border-radius:var(--radius-sm);display:inline-flex;align-items:center;gap:3px}.post-body{padding:14px;font-size:15px;line-height:1.6;color:var(--text-main);word-break:break-word}.post-body blockquote,.post-body .quote,.post-body div[style*="quote"]{background-color:var(--quote-bg);border-left:3px solid var(--quote-border);padding:8px 12px;margin:10px 0;border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-size:14px;color:var(--text-muted)}.post-body img{max-width:100%;height:auto;border-radius:var(--radius-sm);margin:6px 0}.post-signature{padding:8px 14px;border-top:1px dashed var(--border-color);font-size:12px;color:var(--text-muted);font-style:italic}.post-edited{padding:4px 14px 8px 14px;font-size:11px;color:var(--text-subtle);text-align:right}.reply-section{margin-top:20px}.reply-card{background-color:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:14px;box-shadow:var(--shadow-sm)}.reply-header{margin-bottom:10px}.reply-title{font-size:16px;font-weight:700;color:var(--text-main)}.reply-composer .toolbar{display:flex;gap:4px;margin-bottom:8px;flex-wrap:wrap}.tool-btn{background-color:var(--bg-subtle);border:1px solid var(--border-color);color:var(--text-main);padding:4px 8px;border-radius:var(--radius-sm);font-size:12px;cursor:pointer}.tool-btn:hover{background-color:var(--bg-hover)}.reply-textarea{width:100%;padding:10px;background-color:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-main);font-size:14px;resize:vertical;min-height:90px;margin-bottom:8px}.reply-textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.reply-footer{display:flex;align-items:center;justify-content:space-between}.word-count{font-size:12px;color:var(--text-muted)}.word-count.valid{color:var(--accent);font-weight:600}.reply-guest-notice{text-align:center;padding:16px;background-color:var(--bg-subtle);border-radius:var(--radius-md)}.reply-guest-notice p{font-size:14px;color:var(--text-muted);margin-bottom:10px}.article-container{background-color:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:18px;box-shadow:var(--shadow-sm)}.article-title{font-size:22px;font-weight:700;line-height:1.35;color:var(--text-main);margin-bottom:8px}.article-meta{font-size:13px;color:var(--text-muted);margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--border-color)}.article-img{width:100%;border-radius:var(--radius-md);margin-bottom:16px}.article-body{font-size:16px;line-height:1.7;color:var(--text-main)}.article-body p{margin-bottom:14px}.categories-list{display:flex;flex-direction:column;gap:16px}.category-group{background-color:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-sm)}.category-title{background-color:var(--bg-subtle);padding:10px 14px;font-size:15px;font-weight:700;border-bottom:1px solid var(--border-color)}.section-item{padding:12px 14px;border-bottom:1px solid var(--border-subtle);cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:8px}.section-item:last-child{border-bottom:none}.section-item:hover{background-color:var(--bg-hover)}.section-item-title{font-size:14px;font-weight:600;color:var(--text-main)}.section-item-desc{font-size:12px;color:var(--text-muted)}.section-item-stats{font-size:11px;color:var(--text-subtle);text-align:right;white-space:nowrap}.modal-backdrop{position:fixed;inset:0;background-color:rgba(0,0,0,0.6);backdrop-filter:blur(4px);z-index:1000;display:flex;align-items:center;justify-content:center;padding:16px;animation:fadeIn 0.15s ease-out}.modal-card{background-color:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-lg);width:100%;max-width:380px;padding:20px;box-shadow:var(--shadow-lg);animation:slideUp 0.2s ease-out}.modal-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.modal-title{font-size:17px;font-weight:700}.modal-close{background:none;border:none;font-size:18px;color:var(--text-muted);cursor:pointer;padding:4px}.modal-form .form-group{margin-bottom:14px}.modal-form label{display:block;font-size:13px;font-weight:500;margin-bottom:4px;color:var(--text-main)}.form-input{width:100%;padding:10px 12px;background-color:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-main);font-size:14px}.form-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.form-group-checkbox{margin-bottom:16px}.checkbox-label{display:flex;align-items:center;gap:8px;font-size:13px;cursor:pointer;color:var(--text-muted)}.login-links{margin-top:16px;text-align:center;font-size:12px;color:var(--text-muted)}.login-links .sep{margin:0 6px;color:var(--border-color)}.alert{padding:10px 12px;border-radius:var(--radius-md);font-size:13px;margin-bottom:14px}.alert-error{background-color:var(--danger-light);color:#991b1b;border:1px solid #fecaca}.toast-container{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);z-index:2000;display:flex;flex-direction:column;gap:8px;width:90%;max-width:360px;pointer-events:none}.toast{background-color:var(--header-bg);color:#ffffff;padding:10px 16px;border-radius:var(--radius-full);font-size:13px;font-weight:500;box-shadow:var(--shadow-lg);text-align:center;pointer-events:auto;animation:toastIn 0.25s ease-out}.toast.toast-error{background-color:#dc2626}.toast.toast-success{background-color:#059669}.app-footer{text-align:center;padding:20px 12px;font-size:12px;color:var(--text-subtle);border-top:1px solid var(--border-color);margin-top:auto}.skeleton-list{display:flex;flex-direction:column;gap:10px}.skeleton-card{height:68px;background:linear-gradient(90deg,var(--bg-subtle) 25%,var(--bg-hover) 50%,var(--bg-subtle) 75%);background-size:200% 100%;animation:skeletonLoading 1.5s infinite;border-radius:var(--radius-md)}.skeleton-news{height:80px;background:linear-gradient(90deg,var(--bg-subtle) 25%,var(--bg-hover) 50%,var(--bg-subtle) 75%);background-size:200% 100%;animation:skeletonLoading 1.5s infinite;border-radius:var(--radius-md)}.skeleton-post{height:140px;background:linear-gradient(90deg,var(--bg-subtle) 25%,var(--bg-hover) 50%,var(--bg-subtle) 75%);background-size:200% 100%;animation:skeletonLoading 1.5s infinite;border-radius:var(--radius-md)}@keyframes skeletonLoading{0%{background-position:200% 0}100%{background-position:-200% 0}}@keyframes fadeIn{from{opacity:0}to{opacity:1}}@keyframes slideUp{from{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}@keyframes toastIn{from{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}@media (min-width:640px){.main-container{padding:20px 16px 40px 16px}.section-title{font-size:20px}.topic-card{padding:14px 18px}.news-card{padding:14px 18px}.featured-img-wrap{height:240px}.post-body{padding:18px 20px}}