/* ============================================
   encyclopedia.css — 迪卓依思·地理志 百科首页样式
   ============================================ */

/* ---- Hero Section ---- */
.ency-hero {
    min-height: 55vh;
    display: flex;
    align-items: center;
    background: linear-gradient(160deg, #0a1628 0%, #1a3a5c 40%, #0d2137 100%);
    color: white;
    padding-top: 72px;
    position: relative;
    overflow: hidden;
}

.ency-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100'%3E%3Cpath d='M0 50 Q25 30 50 50 T100 50' stroke='rgba(255,255,255,0.03)' fill='none' stroke-width='1'/%3E%3Cpath d='M0 60 Q25 40 50 60 T100 60' stroke='rgba(255,255,255,0.02)' fill='none' stroke-width='1'/%3E%3C/svg%3E");
    opacity: 0.5;
}

.ency-hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    padding: var(--space-3xl) var(--space-lg);
}

.ency-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.15);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    margin-bottom: var(--space-xl);
    letter-spacing: 0.05em;
}

.ency-hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3.25rem);
    font-weight: 900;
    margin-bottom: var(--space-md);
    text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.ency-hero h1 .highlight {
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-secondary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.ency-hero p {
    color: rgba(255,255,255,0.75);
    font-size: clamp(1rem, 2vw, 1.25rem);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
    line-height: 1.8;
}

/* ---- Search Box ---- */
.ency-search-wrap {
    max-width: 640px;
    margin: 0 auto;
    position: relative;
}

.ency-search-box {
    display: flex;
    align-items: center;
    background: rgba(255,255,255,0.12);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: var(--radius-full);
    padding: var(--space-sm) var(--space-lg);
    transition: var(--transition-base);
}

.ency-search-box:focus-within {
    background: rgba(255,255,255,0.2);
    border-color: rgba(255,255,255,0.4);
    box-shadow: 0 0 0 4px rgba(46,125,50,0.2);
}

.ency-search-box svg {
    color: rgba(255,255,255,0.6);
    flex-shrink: 0;
}

.ency-search-box input {
    flex: 1;
    background: transparent;
    border: none;
    color: white;
    font-size: 1.0625rem;
    padding: var(--space-sm) var(--space-md);
    outline: none;
    font-family: var(--font-body);
}

.ency-search-box input::placeholder {
    color: rgba(255,255,255,0.45);
}

.ency-search-box .search-clear {
    width: 32px; height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.5);
    transition: var(--transition-fast);
    opacity: 0;
    pointer-events: none;
}

.ency-search-box .search-clear.visible {
    opacity: 1;
    pointer-events: auto;
}

.ency-search-box .search-clear:hover {
    background: rgba(255,255,255,0.15);
    color: white;
}

/* ---- Category Nav ---- */
.ency-categories {
    background: var(--color-card);
    border-bottom: 1px solid var(--color-border-light);
    padding: var(--space-xl) 0;
    position: sticky;
    top: 72px;
    z-index: 100;
}

.cat-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: var(--space-md);
}

.cat-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-lg) var(--space-md);
    border-radius: var(--radius-lg);
    border: 2px solid transparent;
    background: var(--color-bg);
    cursor: pointer;
    transition: var(--transition-base);
    text-align: center;
}

.cat-card:hover {
    border-color: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.cat-card.active {
    border-color: var(--color-primary);
    background: linear-gradient(135deg, #E8F5E9, #C8E6C9);
}

.cat-card .cat-icon {
    font-size: 2rem;
    line-height: 1;
}

.cat-card .cat-name {
    font-weight: 600;
    font-size: 0.9375rem;
    color: var(--color-text);
}

.cat-card .cat-count {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

/* ---- A-Z Index ---- */
.ency-az {
    background: var(--color-bg);
    padding: var(--space-xl) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.az-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.az-nav {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.az-btn {
    min-width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    background: var(--color-card);
    border: 1px solid var(--color-border-light);
    transition: var(--transition-fast);
    cursor: pointer;
    padding: 0 var(--space-sm);
}

.az-btn:hover {
    background: var(--color-sky);
    color: var(--color-secondary-dark);
    border-color: var(--color-secondary-light);
}

.az-btn.active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    box-shadow: 0 2px 8px rgba(46,125,50,0.3);
}

.az-btn.disabled {
    opacity: 0.35;
    cursor: not-allowed;
    pointer-events: none;
}

/* ---- Term List ---- */
.ency-terms {
    background: var(--color-bg);
    padding: var(--space-2xl) 0 var(--space-4xl);
    min-height: 60vh;
}

.terms-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
    gap: var(--space-md);
}

.terms-header h2 {
    font-family: var(--font-heading);
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.terms-header .result-count {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
}

.terms-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

/* ---- Term Card ---- */
.term-card {
    background: var(--color-card);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border-light);
    padding: var(--space-xl);
    transition: var(--transition-base);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.term-card::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, var(--color-primary), var(--color-secondary));
    opacity: 0;
    transition: var(--transition-base);
}

.term-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: transparent;
}

.term-card:hover::before {
    opacity: 1;
}

.term-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: var(--space-md);
    gap: var(--space-md);
}

.term-card-title {
    flex: 1;
}

.term-card-title h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
    line-height: 1.3;
}

.term-card-title .term-meta {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.term-card-title .term-pinyin {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    font-style: italic;
}

.term-card-title .term-en {
    font-size: 0.8125rem;
    color: var(--color-secondary);
    font-family: var(--font-mono);
}

.term-card .term-category-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    background: var(--color-sky);
    color: var(--color-secondary-dark);
    flex-shrink: 0;
}

.term-card .term-definition {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-md);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.term-card .term-standard {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border-light);
}

.term-card .term-standard svg {
    flex-shrink: 0;
}

/* ---- Term Detail Modal ---- */
.term-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
}

.term-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.term-modal {
    background: var(--color-card);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 800px;
    max-height: 85vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transform: translateY(20px) scale(0.98);
    transition: var(--transition-base);
    box-shadow: var(--shadow-xl);
}

.term-modal-overlay.active .term-modal {
    transform: translateY(0) scale(1);
}

.term-modal-header {
    padding: var(--space-xl) var(--space-2xl);
    border-bottom: 1px solid var(--color-border-light);
    position: relative;
    background: linear-gradient(135deg, #f8faf8, #ffffff);
}

.term-modal-header .modal-close {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    width: 40px; height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    transition: var(--transition-fast);
    background: var(--color-bg);
    border: 1px solid var(--color-border-light);
}

.term-modal-header .modal-close:hover {
    background: var(--color-border-light);
    color: var(--color-text);
}

.term-modal-header h2 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
    padding-right: 48px;
}

.term-modal-header .modal-meta {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.term-modal-header .modal-meta span {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.term-modal-header .modal-meta .modal-cat {
    background: var(--color-sky);
    color: var(--color-secondary-dark);
    padding: 2px 10px;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.8125rem;
}

.term-modal-body {
    padding: var(--space-xl) var(--space-2xl);
    overflow-y: auto;
    flex: 1;
}

.term-modal-body .modal-section {
    margin-bottom: var(--space-xl);
}

.term-modal-body .modal-section:last-child {
    margin-bottom: 0;
}

.term-modal-body .modal-section h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.term-modal-body .modal-section h4::before {
    content: '';
    width: 4px; height: 18px;
    background: linear-gradient(180deg, var(--color-primary), var(--color-secondary));
    border-radius: 2px;
}

.term-modal-body .modal-definition {
    font-size: 1rem;
    line-height: 1.9;
    color: var(--color-text);
    padding: var(--space-lg);
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--color-primary);
}

.term-modal-body .modal-standard {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    color: var(--color-text-muted);
    padding: var(--space-md);
    background: #FFF8E1;
    border-radius: var(--radius-lg);
    border: 1px solid #FFE082;
}

.term-modal-body .modal-related {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.term-modal-body .modal-related a {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--color-secondary);
    transition: var(--transition-fast);
}

.term-modal-body .modal-related a:hover {
    background: var(--color-sky);
    border-color: var(--color-secondary-light);
}

/* ---- Canvas Diagram Area ---- */
.modal-canvas-wrap {
    margin: var(--space-lg) 0;
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    border: 1px solid var(--color-border-light);
}

.modal-canvas-wrap canvas {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-md);
}

.modal-canvas-wrap .canvas-caption {
    text-align: center;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-top: var(--space-sm);
}

/* ---- Empty State ---- */
.terms-empty {
    text-align: center;
    padding: var(--space-4xl) var(--space-lg);
    color: var(--color-text-muted);
}

.terms-empty svg {
    margin-bottom: var(--space-lg);
    opacity: 0.5;
}

.terms-empty h3 {
    font-family: var(--font-heading);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
}

/* ---- Featured Terms ---- */
.ency-featured {
    background: var(--color-card);
    padding: var(--space-4xl) 0;
}

.featured-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.featured-card {
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    border: 1px solid var(--color-border-light);
    transition: var(--transition-base);
    cursor: pointer;
}

.featured-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: var(--color-primary-light);
}

.featured-card .featured-letter {
    width: 48px; height: 48px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
}

.featured-card h4 {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.featured-card p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ---- Stats Bar ---- */
.ency-stats-bar {
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-secondary-dark));
    color: white;
    padding: var(--space-xl) 0;
}

.ency-stats-bar .stats-flex {
    display: flex;
    justify-content: center;
    gap: var(--space-3xl);
    flex-wrap: wrap;
}

.ency-stats-bar .stat-unit {
    text-align: center;
}

.ency-stats-bar .stat-unit .num {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 900;
    background: linear-gradient(135deg, #fff, rgba(255,255,255,0.7));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.ency-stats-bar .stat-unit .label {
    font-size: 0.875rem;
    color: rgba(255,255,255,0.7);
    margin-top: 4px;
}

/* ---- Responsive ---- */
@media (min-width: 1024px) and (max-width: 1439px) {
    .cat-grid { grid-template-columns: repeat(3, 1fr); }
    .terms-grid { grid-template-columns: 1fr; }
    .featured-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px) and (max-width: 1023px) {
    .cat-grid { grid-template-columns: repeat(3, 1fr); }
    .terms-grid { grid-template-columns: 1fr; }
    .featured-grid { grid-template-columns: repeat(2, 1fr); }
    .ency-categories { position: relative; top: auto; }
}

@media (max-width: 767px) {
    .cat-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-sm); }
    .terms-grid { grid-template-columns: 1fr; }
    .featured-grid { grid-template-columns: 1fr; }
    .ency-categories { position: relative; top: auto; }
    .az-btn { min-width: 32px; height: 32px; font-size: 0.8125rem; }
    .term-modal { max-height: 90vh; }
    .term-modal-header { padding: var(--space-lg); }
    .term-modal-body { padding: var(--space-lg); }
    .terms-header { flex-direction: column; align-items: flex-start; }
}