:root{--bg-primary: #fafbfc;--bg-secondary: #f5f7f9;--bg-tertiary: #eef1f5;--bg-card: #ffffff;--bg-glass: rgba(255, 255, 255, .85);--bg-hover: rgba(59, 130, 246, .04);--primary-50: #f0f7ff;--primary-100: #e0efff;--primary-200: #b8d9fe;--primary-300: #7ab5fc;--primary-400: #3b8bf6;--primary-500: #1a6de8;--primary-600: #1455c2;--primary-700: #1243a0;--accent-blue: #2563eb;--accent-purple: #7c3aed;--accent-cyan: #0891b2;--accent-pink: #db2777;--accent-green: #059669;--accent-orange: #d97706;--accent-red: #dc2626;--gradient-primary: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);--gradient-secondary: linear-gradient(135deg, #8b5cf6 0%, #6366f1 100%);--gradient-accent: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);--gradient-text: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);--gradient-card: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);--text-primary: #1a1f36;--text-secondary: #4a5568;--text-muted: #8896ab;--text-light: #a0aec0;--text-inverse: #ffffff;--border-subtle: rgba(0, 0, 0, .05);--border-light: rgba(0, 0, 0, .08);--border-medium: rgba(0, 0, 0, .12);--border-focus: rgba(37, 99, 235, .4);--border-glow: rgba(59, 130, 246, .2);--shadow-xs: 0 1px 2px rgba(0, 0, 0, .03);--shadow-sm: 0 2px 4px rgba(0, 0, 0, .04);--shadow-md: 0 4px 12px rgba(0, 0, 0, .06);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .08);--shadow-xl: 0 16px 40px rgba(0, 0, 0, .1);--shadow-card: 0 2px 8px rgba(0, 0, 0, .04), 0 4px 16px rgba(0, 0, 0, .04);--shadow-glow: 0 4px 20px rgba(59, 130, 246, .15);--radius-xs: 4px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--radius-full: 9999px;--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-normal: .25s cubic-bezier(.4, 0, .2, 1);--transition-slow: .4s cubic-bezier(.4, 0, .2, 1);--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 16px;--spacing-lg: 24px;--spacing-xl: 32px;--spacing-2xl: 48px;--font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, "Noto Sans SC", "PingFang SC", 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slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}@keyframes scaleIn{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.animate-fade-in{animation:fadeIn var(--transition-normal) ease forwards}.animate-slide-up{animation:slideUp var(--transition-normal) ease forwards}.animate-slide-down{animation:slideDown var(--transition-normal) ease forwards}.animate-scale-in{animation:scaleIn var(--transition-normal) ease forwards}.page-transition{transition:opacity .25s ease,transform .25s 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0}}.blog-card-content{padding:20px}.blog-header-row{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;margin-bottom:10px}.blog-title{font-size:1.05rem;font-weight:700;color:var(--text-primary);margin:0;line-height:1.4;flex:1}.pinned-badge{display:inline-flex;align-items:center;padding:4px 10px;background:var(--gradient-primary);color:#fff;font-size:.7rem;font-weight:600;border-radius:var(--radius-sm);flex-shrink:0;text-transform:uppercase;letter-spacing:.02em}.blog-excerpt{font-size:.9rem;color:var(--text-secondary);line-height:1.6;margin:0 0 16 px 0;display:-webkit-box;-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.blog-meta{display:flex;justify-content:space-between;align-items:center;font-size:.85rem}.blog-date{color:var(--text-muted)}.read-more{display:inline-flex;align-items:center;gap:4px;color:var(--accent-blue);font-weight:600;transition:all .15s cubic-bezier(.4,0,.2,1)}.arrow-icon{width:14px;height:14px;transition:transform .15s cubic-bezier(.4,0,.2,1)}.blog-card:hover .read-more{color:var(--primary-600)}.blog-card:hover .arrow-icon{transform:translate(4px)}@media(max-width:768px){.blog-grid{grid-template-columns:1fr;gap:16px}.blog-card-image{height:140px}.blog-card-content{padding:16px}.blog-title{font-size:1rem}}.video-section{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-xl);padding:28px;box-shadow:var(--shadow-card);margin:0 20px 24px}.video-section .section-title{font-size:1.35rem;margin:0 0 20px;color:var(--text-primary);font-weight:700;display:flex;align-items:center;gap:10px;letter-spacing:-.01em}.video-section .title-icon{font-size:1.2rem}.video-player{overflow:hidden;position:relative;background:#000;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg)}.video-header-overlay{position:absolute;top:0;left:0;width:100%;padding:16px 20px;background:linear-gradient(to 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cubic-bezier(.4,0,.2,1)}.retry-btn:hover{background:var(--primary-600);transform:scale(1.02)}@media(max-width:768px){.video-section{margin:0 16px 20px;padding:20px}.video-section .section-title{font-size:1.2rem;margin-bottom:16px}.video-player video{max-height:50vh}.video-header-overlay{padding:12px 16px}.video-title{font-size:.9rem}}.video-list-section{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-xl);padding:28px;box-shadow:var(--shadow-card);margin:0 20px 30px}.video-list-section .section-title{font-size:1.35rem;margin:0 0 24px;color:var(--text-primary);font-weight:700;display:flex;align-items:center;gap:10px;letter-spacing:-.01em}.video-list-section .title-icon{font-size:1.2rem}.video-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:18px}.video-item{background:var(--bg-secondary);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);cursor:pointer;transition:all .25s cubic-bezier(.4,0,.2,1);overflow:hidden;display:flex;flex-direction:column}.video-item:hover{transform:translateY(-4px);border-color:var(--primary-200);box-shadow:var(--shadow-lg),0 0 0 1px var(--primary-100)}.video-item:focus-visible{outline:2px solid var(--accent-blue);outline-offset:2px}.video-item-cover{height:120px;background:linear-gradient(135deg,var(--primary-50) 0%,var(--bg-tertiary) 100%);display:flex;align-items:center;justify-content:center;position:relative}.video-item-cover:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(180deg,transparent 50%,rgba(0,0,0,.02) 100%)}.play-icon{width:48px;height:48px;background:var(--bg-card);border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--accent-blue);box-shadow:var(--shadow-md);transition:all .15s cubic-bezier(.4,0,.2,1);position:relative;z-index:1}.play-icon svg{width:18px;height:18px;margin-left:2px}.video-item:hover .play-icon{transform:scale(1.1);background:var(--gradient-primary);color:#fff;box-shadow:var(--shadow-lg),var(--shadow-glow)}.video-item-content{padding:16px}.video-item-title{font-size:.95rem;margin:0 0 8px;color:var(--text-primary);font-weight:600;line-height:1.4}.video-item-desc{font-size:.85rem;color:var(--text-secondary);margin:0;line-height:1.5}@media(max-width:768px){.video-list-section{margin:0 16px 24px;padding:20px}.video-list{grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px}.video-list-section .section-title{font-size:1.2rem;margin-bottom:18px}.video-item-cover{height:100px}.play-icon{width:42px;height:42px}.play-icon svg{width:16px;height:16px}}@media(max-width:480px){.video-list{grid-template-columns:1fr}}.home-view{min-height:100vh}.hero-section{background:linear-gradient(180deg,var(--primary-50) 0%,var(--bg-primary) 100%);padding:80px 40px 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