/* Glass Liquid (Apple) Design System - Terms Page */
:root {
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-bg-strong: rgba(255, 255, 255, 0.2);
    --glass-border: rgba(255, 255, 255, 0.3);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
    --glass-shadow-strong: 0 16px 64px rgba(0, 0, 0, 0.15);
    
    --primary-gradient: linear-gradient(135deg, #007AFF 0%, #5856D6 100%);
    --secondary-gradient: linear-gradient(135deg, #32D74B 0%, #30D158 100%);
    --accent-gradient: linear-gradient(135deg, #FF9500 0%, #FF6347 100%);
    --background-gradient: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    
    --text-primary: rgba(255, 255, 255, 0.95);
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-tertiary: rgba(255, 255, 255, 0.5);
    --text-dark: rgba(0, 0, 0, 0.85);
    --text-dark-secondary: rgba(0, 0, 0, 0.6);
    
    --border-radius: 16px;
    --border-radius-large: 24px;
    --border-radius-small: 12px;
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
}

/* Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Noto Sans SC', system-ui, sans-serif;
    background: var(--background-gradient);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
    padding-top: 80px; /* 为固定navbar留出空间 */
    padding-bottom: 70px; /* 为固定footer留出空间 */
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(120, 200, 255, 0.2) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* Sticky Navigation */
.sticky-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border-bottom: 1px solid var(--glass-border);
    height: 80px;
    z-index: 1001;
    box-shadow: var(--glass-shadow);
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.nav-search {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg); /* 增加筛选按钮和搜索框之间的距离 */
}

.search-container {
    position: relative;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: var(--spacing-md);
    color: var(--text-tertiary);
    pointer-events: none;
    z-index: 1;
}

.search-container input {
    padding: var(--spacing-sm) var(--spacing-md) var(--spacing-sm) 40px;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    color: var(--text-primary);
    font-family: inherit;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    width: 250px;
}

.search-container input::placeholder {
    color: var(--text-tertiary);
}

.search-container input:focus {
    outline: none;
    border-color: rgba(0, 122, 255, 0.6);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.2);
    background: rgba(255, 255, 255, 0.12);
}

/* Action Buttons */
.action-btn {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.9rem;
    box-shadow: var(--glass-shadow);
}

.action-btn:hover {
    background: var(--glass-bg-strong);
    transform: translateY(-2px);
    box-shadow: var(--glass-shadow-strong);
}

.action-btn svg {
    width: 16px;
    height: 16px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

/* Dropdown */
.dropdown {
    position: relative;
}

.dropdown-content {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    box-shadow: var(--glass-shadow-strong);
    padding: var(--spacing-md);
    min-width: 400px;
    z-index: 1002;
}

.dropdown-content.show {
    display: block;
    animation: fadeInDown 0.3s ease-out;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.filter-section-dropdown h4 {
    color: rgba(0, 0, 0, 0.9);
    margin-bottom: var(--spacing-md);
    font-size: 1rem;
    font-weight: 600;
}

/* Filter Toggle in Dropdown */
.filter-toggle {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* Header */
header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
}

header h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, #ffffff 0%, #f0f9ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
    text-shadow: 0 2px 20px rgba(255, 255, 255, 0.1);
}

.subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: var(--spacing-lg);
    letter-spacing: 0.01em;
}

.header-btn {
    position: absolute;
    top: 0;
    left: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-sm) var(--spacing-lg);
    color: var(--text-primary);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    box-shadow: var(--glass-shadow);
    font-size: 0.95rem;
}

.header-btn:hover {
    background: var(--glass-bg-strong);
    transform: translateY(-2px);
    box-shadow: var(--glass-shadow-strong);
}





/* Filter Buttons */
.filter-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 0, 0, 0.2);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    font-size: 0.95rem;
    color: rgba(0, 0, 0, 0.85);
    font-weight: 500;
}

.filter-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
    border-color: rgba(0, 0, 0, 0.3);
}

.filter-btn.active {
    background: var(--primary-gradient);
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 16px rgba(0, 122, 255, 0.3);
}

.search-stats {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    background: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-small);
    border: 1px solid rgba(255, 255, 255, 0.2);
    margin-top: var(--spacing-md);
}

/* Comparison Table */
.comparison-table {
    background: var(--glass-bg);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-large);
    box-shadow: var(--glass-shadow-strong);
    overflow: hidden;
    margin-bottom: var(--spacing-xl);
}

.table-header {
    display: grid;
    grid-template-columns: 1fr 1fr auto auto;
    gap: var(--spacing-md);
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px);
    padding: var(--spacing-lg);
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.table-header > div {
    font-size: 1rem;
    letter-spacing: 0.01em;
}

#terms-container {
    max-height: 70vh;
    overflow-y: auto;
}

.term-row {
    display: grid;
    grid-template-columns: 1fr 1fr auto auto;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    background: rgba(255, 255, 255, 0.02);
}

.term-row:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateX(4px);
}

.term-row:last-child {
    border-bottom: none;
}

.col-mainland, .col-taiwan {
    font-weight: 500;
    color: var(--text-primary);
    font-size: 1rem;
}

.col-mainland {
    color: #32D74B;
}

.col-taiwan {
    color: #007AFF;
}

.col-category {
    background: var(--accent-gradient);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-small);
    font-size: 0.8rem;
    font-weight: 600;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(255, 149, 0, 0.3);
}

.col-note {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-style: italic;
    max-width: 200px;
    word-wrap: break-word;
}

/* Fixed Footer */
.fixed-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border-top: 1px solid var(--glass-border);
    height: 70px;
    z-index: 1000;
    box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.12);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

/* Highlight Toggle in Footer */
.highlight-toggle-container {
    display: flex;
    align-items: center;
}

.highlight-toggle {
    display: flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
    gap: var(--spacing-xs);
}

.highlight-toggle input[type="checkbox"] {
    display: none;
}

.toggle-slider-small {
    position: relative;
    width: 40px;
    height: 20px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.toggle-slider-small:before {
    content: "";
    position: absolute;
    top: 2px;
    left: 2px;
    width: 14px;
    height: 14px;
    background: white;
    border-radius: 50%;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.highlight-toggle input:checked + .toggle-slider-small {
    background: var(--primary-gradient);
    border-color: rgba(0, 122, 255, 0.5);
}

.highlight-toggle input:checked + .toggle-slider-small:before {
    transform: translateX(20px);
}

.toggle-label-small {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.footer-stats {
    font-size: 0.875rem;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-small);
    border: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.footer-link a {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-small);
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-link a:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.footer-link svg {
    width: 16px;
    height: 16px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding-top: 60px; /* 移动端navbar高度调整 */
        padding-bottom: 60px; /* 移动端footer高度调整 */
    }
    
    .sticky-nav {
        height: 60px;
    }
    
    .fixed-footer {
        height: 60px;
    }
    
    .nav-content {
        padding: 0 var(--spacing-md);
        flex-direction: row;
        gap: var(--spacing-sm);
    }
    
    .nav-actions .action-btn span {
        display: none; /* 在小屏幕上隐藏按钮文字 */
    }
    
    .nav-title {
        font-size: 1rem;
    }
    
    .search-container input {
        width: 180px;
        font-size: 0.85rem;
    }
    
    .dropdown-content {
        min-width: 280px;
        right: -20px;
        left: auto;
    }
    
    .container {
        padding: var(--spacing-md);
    }
    
    .footer-content {
        padding: 0 var(--spacing-md);
        flex-direction: row;
        gap: var(--spacing-sm);
    }
    
    .footer-stats {
        font-size: 0.8rem;
    }
    
    .toggle-label-small {
        font-size: 0.8rem;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .filter-buttons {
        justify-content: center;
    }
    
    .table-header,
    .term-row {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-sm);
    }
    
    .col-category,
    .col-note {
        grid-column: 1 / -1;
        margin-top: var(--spacing-sm);
    }
    
    .col-category {
        max-width: fit-content;
        justify-self: start;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.75rem;
    }
    
    .filter-btn {
        font-size: 0.875rem;
        padding: var(--spacing-xs) var(--spacing-md);
    }
    
    .search-container input {
        width: 150px;
    }
    
    .dropdown-content {
        min-width: 260px;
        right: -40px;
    }
    
    .comparison-table {
        margin-left: calc(-1 * var(--spacing-md));
        margin-right: calc(-1 * var(--spacing-md));
        border-radius: var(--border-radius);
    }
}