.page-header-section{background:var(--bg-card);border:2px solid var(--border-primary);border-radius:clamp(12px,2vw,16px);padding:clamp(20px,4vw,32px);margin-bottom:clamp(20px,3vw,28px);box-shadow:0 2px 8px rgba(0,0,0,0.08);position:relative;overflow:hidden;}
.page-header-section::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--primary-color),var(--primary-color-hover));}
.page-title-wrapper{display:flex;align-items:center;gap:clamp(12px,2vw,16px);}
.page-icon-wrapper{width:clamp(48px,8vw,64px);height:clamp(48px,8vw,64px);background:linear-gradient(135deg,var(--primary-color),var(--primary-color-hover));border-radius:12px;display:flex;align-items:center;justify-content:center;flex-shrink:0;box-shadow:0 4px 12px rgba(255,102,0,0.3);}
.page-icon-wrapper .icon{width:clamp(24px,4vw,32px);height:clamp(24px,4vw,32px);fill:white;}
.page-title{font-size:clamp(24px,5vw,36px);font-weight:700;color:var(--text-primary);margin:0;line-height:1.2;}
.category-header-section,.tag-header-section{background:var(--bg-card);border:2px solid var(--border-primary);border-radius:clamp(12px,2vw,16px);padding:clamp(20px,4vw,32px);margin-bottom:clamp(24px,4vw,36px);box-shadow:0 2px 8px rgba(0,0,0,0.08);position:relative;overflow:hidden;}
.category-header-section::before,.tag-header-section::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--primary-color),var(--primary-color-hover));}
.category-header-top,.tag-header-top{display:flex;align-items:center;justify-content:space-between;gap:clamp(12px,2vw,20px);margin-bottom:clamp(16px,3vw,24px);flex-wrap:wrap;}
.category-title-group,.tag-title-group{display:flex;align-items:center;gap:clamp(12px,2vw,16px);flex:1;min-width:0;}
.category-icon-wrapper,.tag-icon-wrapper{width:clamp(48px,8vw,64px);height:clamp(48px,8vw,64px);background:linear-gradient(135deg,var(--primary-color),var(--primary-color-hover));border-radius:12px;display:flex;align-items:center;justify-content:center;flex-shrink:0;box-shadow:0 4px 12px rgba(255,102,0,0.3);}
.category-icon-wrapper .icon,.tag-icon-wrapper .icon{width:clamp(24px,4vw,32px);height:clamp(24px,4vw,32px);fill:white;}
.category-title-content,.tag-title-content{flex:1;min-width:0;}
.category-page-title,.tag-page-title{font-size:clamp(24px,5vw,36px);font-weight:700;color:var(--text-primary);margin:0 0 clamp(4px,1vw,8px) 0;line-height:1.2;word-wrap:break-word;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;}
.category-meta-info,.tag-meta-info{display:flex;align-items:center;gap:clamp(12px,2vw,20px);flex-wrap:wrap;font-size:clamp(13px,2vw,15px);color:var(--text-secondary);}
.category-meta-item,.tag-meta-item{display:flex;align-items:center;gap:6px;}
.category-meta-item .icon,.tag-meta-item .icon{width:16px;height:16px;fill:var(--primary-color);}
.category-back-btn,.tag-back-btn{display:inline-flex;align-items:center;gap:8px;padding:clamp(8px,1.5vw,12px) clamp(16px,3vw,24px);background:var(--bg-hover);border:2px solid var(--border-primary);border-radius:8px;color:var(--text-primary);text-decoration:none;font-size:clamp(13px,2vw,15px);font-weight:500;transition:opacity 0.3s ease,transform 0.3s ease,background-color 0.3s ease,color 0.3s ease;white-space:nowrap;}
.category-back-btn:hover,.tag-back-btn:hover{background:var(--primary-color);border-color:var(--primary-color);color:white;transform:translateX(-4px);}
.category-back-btn .icon,.tag-back-btn .icon{width:16px;height:16px;transition:transform 0.3s ease;}
.category-back-btn:hover .icon,.tag-back-btn:hover .icon{transform:translateX(-2px);}
.category-description-box,.tag-description-box{background:var(--bg-hover);border-left:4px solid var(--primary-color);padding:clamp(12px,2vw,16px) clamp(16px,3vw,20px);border-radius:8px;margin-top:clamp(16px,3vw,20px);}
.category-description-box p,.tag-description-box p{margin:0;color:var(--text-primary);font-size:clamp(14px,2vw,16px);line-height:1.6;}
.filter-section{background:var(--bg-card);border:2px solid var(--border-primary);border-radius:clamp(10px,1.5vw,12px);padding:clamp(10px,1.5vw,14px);margin-bottom:clamp(14px,2.5vw,20px);}
.filter-group{margin-bottom:clamp(10px,1.5vw,14px);}
.filter-group:last-child{margin-bottom:0;}
.filter-label{display:flex;align-items:center;gap:6px;margin-bottom:clamp(8px,1vw,10px);font-size:clamp(14px,2vw,16px);font-weight:600;color:var(--text-primary);}
.filter-label .icon{width:18px;height:18px;fill:var(--primary-color);}
.filter-options{display:flex;flex-wrap:wrap;gap:clamp(6px,1vw,10px);}
.sort-options{margin-bottom:0;}
.filter-btn{display:inline-flex;align-items:center;justify-content:center;padding:clamp(5px,1vw,7px) clamp(10px,2vw,14px);background:var(--bg-hover);border:2px solid var(--border-primary);border-radius:6px;color:var(--text-primary);text-decoration:none;font-size:clamp(13px,1.8vw,14px);font-weight:500;transition:opacity 0.3s ease,transform 0.3s ease,background-color 0.3s ease,color 0.3s ease;white-space:nowrap;cursor:pointer;}
.filter-btn:hover{background:var(--primary-color);border-color:var(--primary-color);color:white;transform:translateY(-2px);box-shadow:0 4px 12px rgba(255,102,0,0.3);}
.filter-btn.active{background:var(--primary-color);border-color:var(--primary-color);color:white;font-weight:600;}
.filter-options-wrapper{display:flex;flex-direction:column;gap:clamp(10px,1.5vw,12px);}
.filter-category{display:flex;align-items:flex-start;gap:clamp(10px,1.5vw,12px);}
.filter-category-name{font-size:clamp(13px,2vw,14px);font-weight:500;color:var(--text-secondary);white-space:nowrap;padding-top:clamp(6px,1vw,8px);min-width:clamp(60px,10vw,80px);}
.filter-controls{display:flex;align-items:center;gap:clamp(16px,3vw,24px);flex-wrap:wrap;}
.filter-item{display:flex;align-items:center;gap:8px;flex:1 1 auto;min-width:clamp(140px,20vw,180px);}
.filter-item-label{display:flex;align-items:center;gap:6px;font-size:clamp(13px,1.8vw,14px);font-weight:600;color:var(--text-primary);white-space:nowrap;}
.filter-item-label .icon{width:16px;height:16px;fill:var(--primary-color);}
.filter-select{flex:1;padding:clamp(6px,1vw,8px) clamp(10px,1.5vw,12px);background:var(--bg-hover);border:2px solid var(--border-primary);border-radius:6px;color:var(--text-primary);font-size:clamp(13px,1.8vw,14px);font-weight:500;cursor:pointer;transition:opacity 0.3s ease,transform 0.3s ease,background-color 0.3s ease,color 0.3s ease;outline:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 9L1 4h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center;padding-right:30px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.filter-select:hover{border-color:var(--primary-color);background-color:var(--bg-card);}
.filter-select:focus{border-color:var(--primary-color);box-shadow:0 0 0 3px rgba(255,102,0,0.1);}
.filter-select option{background:var(--bg-card);color:var(--text-primary);padding:8px;}
.filter-select option:checked,.filter-select option:hover{background:var(--primary-color) !important;color:white !important;}
.clear-filters{margin-top:clamp(10px,1.5vw,12px);padding-top:clamp(10px,1.5vw,12px);border-top:1px solid var(--border-primary);}
.clear-filters-btn{display:inline-flex;align-items:center;gap:6px;padding:clamp(6px,1vw,8px) clamp(12px,2vw,16px);background:#ef5350;border:2px solid #ef5350;border-radius:6px;color:white;text-decoration:none;font-size:clamp(13px,1.8vw,14px);font-weight:600;transition:opacity 0.3s ease,transform 0.3s ease,background-color 0.3s ease,color 0.3s ease;white-space:nowrap;cursor:pointer;}
.clear-filters-btn:hover{background:#d32f2f;border-color:#d32f2f;transform:translateY(-2px);box-shadow:0 2px 8px rgba(239,83,80,0.4);}
.clear-filters-btn .icon{width:14px;height:14px;fill:white;transition:transform 0.3s ease;}
.clear-filters-btn:hover .icon{transform:rotate(90deg);}
.video-section{margin-bottom:clamp(32px,5vw,48px);}
.section-stats{display:flex;align-items:center;justify-content:space-between;margin-bottom:clamp(16px,3vw,24px);padding:clamp(12px,2vw,16px);background:var(--bg-hover);border-radius:8px;flex-wrap:wrap;gap:12px;}
.stats-text{font-size:clamp(13px,2vw,15px);color:var(--text-secondary);}
.stats-text strong{color:var(--primary-color);font-weight:600;}
.empty-state{text-align:center;padding:clamp(60px,10vw,100px) 20px;background:var(--bg-card);border:2px dashed var(--border-primary);border-radius:12px;}
.empty-state .icon{width:clamp(60px,10vw,90px);height:clamp(60px,10vw,90px);fill:var(--text-tertiary);margin-bottom:0;opacity:0.5;}
.empty-state-text{font-size:clamp(16px,3vw,20px);color:var(--text-secondary);margin-bottom:12px;font-weight:500;}
.empty-state-hint{font-size:clamp(13px,2vw,15px);color:var(--text-tertiary);}
.empty-state-link{display:inline-flex;align-items:center;gap:8px;margin-top:24px;padding:12px 24px;background:var(--primary-color);color:white;text-decoration:none;border-radius:8px;font-weight:500;transition:opacity 0.3s ease,transform 0.3s ease,background-color 0.3s ease,color 0.3s ease;}
.empty-state-link:hover{background:var(--primary-color-hover);transform:translateY(-2px);box-shadow:0 4px 12px rgba(255,102,0,0.4);}
.empty-state-link .icon{width:20px;height:20px;fill:white;opacity:1;flex-shrink:0;}
.empty-state-link span{white-space:nowrap;}
.breadcrumb{margin-bottom:clamp(16px,3vw,24px);}
.period-tabs-wrapper{margin-bottom:clamp(20px,3vw,28px);}
.period-tabs{display:flex;flex-wrap:wrap;gap:clamp(8px,1.5vw,12px);background:var(--bg-card);border:2px solid var(--border-primary);border-radius:clamp(12px,2vw,16px);padding:clamp(12px,2vw,16px);box-shadow:0 2px 8px rgba(0,0,0,0.08);}
.period-tab{display:inline-flex;align-items:center;gap:clamp(6px,1vw,10px);padding:clamp(10px,1.5vw,14px) clamp(16px,2.5vw,24px);background:var(--bg-hover);border:2px solid var(--border-primary);border-radius:clamp(8px,1.5vw,10px);color:var(--text-primary);text-decoration:none;font-size:clamp(14px,2vw,16px);font-weight:500;transition:opacity 0.3s ease,transform 0.3s ease,background-color 0.3s ease,color 0.3s ease;cursor:pointer;flex:1 1 auto;justify-content:center;min-width:clamp(100px,15vw,140px);}
.period-tab .icon{width:clamp(18px,2.5vw,22px);height:clamp(18px,2.5vw,22px);fill:var(--text-secondary);transition:opacity 0.3s ease,transform 0.3s ease,background-color 0.3s ease,color 0.3s ease;flex-shrink:0;}
.period-tab:hover{background:var(--bg-card);border-color:var(--primary-color);color:var(--primary-color);transform:translateY(-2px);box-shadow:0 4px 12px rgba(255,102,0,0.15);}
.period-tab:hover .icon{fill:var(--primary-color);}
.period-tab.active{background:linear-gradient(135deg,var(--primary-color),var(--primary-color-hover));border-color:var(--primary-color);color:white;font-weight:600;box-shadow:0 4px 16px rgba(255,102,0,0.35);}
.period-tab.active .icon{fill:white;}
.period-tab.active:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(255,102,0,0.45);}
.period-label{margin:0;font-size:inherit;font-weight:inherit;color:inherit;display:inline;}
@media (max-width:768px){.period-tabs{gap:8px;padding:12px;}
.period-tab{padding:10px 14px;font-size:13px;min-width:calc(50% - 4px);flex:1 1 calc(50% - 4px);}
.period-tab .icon{width:16px;height:16px;}
}
@media (max-width:480px){.period-tabs{padding:10px;border-radius:10px;}
.period-tab{padding:8px 12px;font-size:12px;min-width:calc(50% - 4px);border-radius:8px;}
.period-tab .icon{width:14px;height:14px;}
}
@media (min-width:1600px){.category-header-section,.tag-header-section{padding:36px 40px;}
}
@media (min-width:1200px) and (max-width:1599px){.category-header-section,.tag-header-section{padding:28px 32px;}
}
@media (max-width:1024px){.page-header-section{padding:24px;}
.category-header-section,.tag-header-section{padding:24px;}
.category-header-top,.tag-header-top{flex-direction:column;align-items:center;}
.category-back-btn,.tag-back-btn{width:auto;}
.filter-section{padding:14px;}
.filter-item{min-width:clamp(120px,25vw,160px);}
}
@media (max-width:768px){.page-header-section{padding:16px;}
.page-title-wrapper{flex-direction:column;text-align:center;}
.category-header-section,.tag-header-section{padding:20px;}
.category-meta-info,.tag-meta-info{flex-direction:column;align-items:flex-start;gap:8px;}
.section-stats{flex-direction:column;align-items:flex-start;}
.filter-category{flex-direction:column;gap:8px;}
.filter-category-name{min-width:auto;padding-top:0;}
}
@media (max-width:640px){.category-header-section,.tag-header-section{padding:16px;border-radius:10px;}
.category-icon-wrapper,.tag-icon-wrapper{width:36px;height:36px;border-radius:8px;}
.category-icon-wrapper .icon,.tag-icon-wrapper .icon{width:20px;height:20px;}
.category-title-group,.tag-title-group{gap:10px;}
.category-page-title,.tag-page-title{font-size:18px;-webkit-line-clamp:2;}
.category-back-btn,.tag-back-btn{width:auto;align-self:center;}
.category-description-box,.tag-description-box{padding:12px 14px;margin-top:14px;}
.empty-state{padding:50px 16px;}
.filter-section{padding:12px;border-radius:10px;}
.filter-controls{flex-direction:column;gap:10px;}
.filter-item{width:100%;min-width:100%;}
.clear-filters-btn{width:100%;justify-content:center;margin-left:0;}
}
@media (max-width:480px){.category-header-section,.tag-header-section{padding:14px;}
.category-back-btn,.tag-back-btn{font-size:13px;padding:8px 14px;}
}
@media (max-width:360px){.category-header-section,.tag-header-section{padding:12px;border-radius:8px;}
.category-title-group,.tag-title-group{gap:10px;}
}
@media (prefers-reduced-motion:reduce){*{animation-duration:0.01ms !important;animation-iteration-count:1 !important;transition-duration:0.01ms !important;}
}