/* assets/css/main.css */
/* 網站主要樣式檔案 */
/* 包含全域樣式、組件樣式和響應式設計 */

/* ========== CSS變數定義 ========== */
:root {
    /* 主要顏色 */
    --primary-color: #3498db;
    --secondary-color: #2980b9;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    
    /* 文字顏色 */
    --text-dark: #2c3e50;
    --text-muted: #6c757d;
    --text-light: #ffffff;
    
    /* 背景顏色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-light: #f1f3f4;
    --bg-dark: #2c3e50;
    
    /* 邊框和分隔線 */
    --border-color: #dee2e6;
    --border-light: #e9ecef;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 20px;
    
    /* 陰影 */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow: 0 4px 8px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.15);
    --shadow-xl: 0 12px 24px rgba(0,0,0,0.2);
    
    /* 字體 */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* 間距 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* 過渡動畫 */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
    
    /* Z-index層級 */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* ========== 基礎重置和全域樣式 ========== */
* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
    height: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-primary);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ========== 頁面佈局修復 ========== */
/* 確保 body 的直接子元素正確配置 */
body > header {
    flex-shrink: 0;
}

body > main,
body > .main-content,
body > .container {
    flex: 1 0 auto;
    width: 100%;
}

body > footer {
    flex-shrink: 0;
    margin-top: auto;
}

/* 主要容器佈局 */
.main-content {
    flex: 1 0 auto;
    padding: var(--spacing-xl) 0;
    width: 100%;
}

/* 容器包裝器確保內容不會影響 footer 位置 */
.page-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.page-wrapper > .content {
    flex: 1 0 auto;
}

.page-wrapper > footer {
    flex-shrink: 0;
}

/* ========== 文字和標題樣式 ========== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    color: var(--text-dark);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-dark);
}

.lead {
    font-size: var(--font-size-lg);
    font-weight: 400;
    color: var(--text-muted);
}

.text-muted {
    color: var(--text-muted) !important;
}

.text-primary {
    color: var(--primary-color) !important;
}

.text-success {
    color: var(--success-color) !important;
}

.text-warning {
    color: var(--warning-color) !important;
}

.text-danger {
    color: var(--danger-color) !important;
}

/* ========== 連結樣式 ========== */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover, a:focus {
    color: var(--secondary-color);
    text-decoration: none;
}

a:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ========== 按鈕樣式 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.25rem;
    font-size: var(--font-size-base);
    font-weight: 500;
    line-height: 1.5;
    border: 1px solid transparent;
    border-radius: var(--border-radius);
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    user-select: none;
    white-space: nowrap;
    vertical-align: middle;
}

.btn:focus {
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}

.btn:disabled {
    opacity: 0.65;
    pointer-events: none;
}

/* 按鈕尺寸 */
.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: var(--font-size-lg);
    border-radius: var(--border-radius-lg);
}

/* 按鈕顏色變體 */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--text-light);
}

.btn-primary:hover {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
    color: var(--text-light);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--text-muted);
    border-color: var(--text-muted);
    color: var(--text-light);
}

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

.btn-success {
    background-color: var(--success-color);
    border-color: var(--success-color);
    color: var(--text-light);
}

.btn-success:hover {
    background-color: #229954;
    border-color: #229954;
    color: var(--text-light);
}

.btn-warning {
    background-color: var(--warning-color);
    border-color: var(--warning-color);
    color: var(--text-light);
}

.btn-warning:hover {
    background-color: #e67e22;
    border-color: #e67e22;
    color: var(--text-light);
}

.btn-danger {
    background-color: var(--danger-color);
    border-color: var(--danger-color);
    color: var(--text-light);
}

.btn-danger:hover {
    background-color: #c0392b;
    border-color: #c0392b;
    color: var(--text-light);
}

/* 外框按鈕 */
.btn-outline-primary {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background-color: transparent;
}

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--text-light);
}

.btn-outline-secondary {
    border-color: var(--text-muted);
    color: var(--text-muted);
    background-color: transparent;
}

.btn-outline-secondary:hover {
    background-color: var(--text-muted);
    border-color: var(--text-muted);
    color: var(--text-light);
}

/* ========== 卡片組件 ========== */
.card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.card-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

.card-text {
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

/* ========== 表格樣式 ========== */
.table {
    width: 100%;
    margin-bottom: var(--spacing-lg);
    background-color: transparent;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 0.75rem;
    vertical-align: top;
    border-top: 1px solid var(--border-color);
}

.table thead th {
    vertical-align: bottom;
    border-bottom: 2px solid var(--border-color);
    font-weight: 600;
    color: var(--text-dark);
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(0, 0, 0, 0.025);
}

.table-hover tbody tr:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

/* ========== 表單樣式 ========== */
.form-control {
    display: block;
    width: 100%;
    padding: 0.625rem 1rem;
    font-size: var(--font-size-base);
    font-weight: 400;
    line-height: 1.5;
    color: var(--text-dark);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
    border-color: var(--primary-color);
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}

.form-control::placeholder {
    color: var(--text-muted);
    opacity: 1;
}

.form-control:disabled {
    background-color: var(--bg-light);
    opacity: 1;
}

.form-select {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m1 6 7 7 7-7'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 16px 12px;
    padding-right: 2.5rem;
}

.form-label {
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-dark);
}

.form-check {
    display: block;
    min-height: 1.5rem;
    padding-left: 1.5rem;
    margin-bottom: 0.125rem;
}

.form-check-input {
    width: 1rem;
    height: 1rem;
    margin-top: 0.25rem;
    margin-left: -1.5rem;
    vertical-align: top;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.25rem;
}

.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.form-check-label {
    color: var(--text-dark);
    cursor: pointer;
}

/* ========== 網格系統增強 ========== */
.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

/* ========== 工具卡片專用樣式 ========== */
.tool-card {
    background: var(--bg-primary);
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-light);
    position: relative;
}

.tool-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.tool-card:hover::before {
    transform: scaleX(1);
}

/* ========== 圖片樣式 ========== */
.img-fluid {
    max-width: 100%;
    height: auto;
}

.img-thumbnail {
    padding: 0.25rem;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
}

/* ========== 徽章和標籤 ========== */
.badge {
    display: inline-block;
    padding: 0.35em 0.65em;
    font-size: 0.75em;
    font-weight: 600;
    line-height: 1;
    color: var(--text-light);
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: var(--border-radius);
}

.badge-primary {
    background-color: var(--primary-color);
}

.badge-secondary {
    background-color: var(--text-muted);
}

.badge-success {
    background-color: var(--success-color);
}

.badge-warning {
    background-color: var(--warning-color);
}

.badge-danger {
    background-color: var(--danger-color);
}

/* ========== 提醒框樣式 ========== */
.alert {
    position: relative;
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
    border: 1px solid transparent;
    border-radius: var(--border-radius);
}

.alert-primary {
    color: #084298;
    background-color: #cfe2ff;
    border-color: #b6d4fe;
}

.alert-success {
    color: #0f5132;
    background-color: #d1e7dd;
    border-color: #badbcc;
}

.alert-warning {
    color: #664d03;
    background-color: #fff3cd;
    border-color: #ffecb5;
}

.alert-danger {
    color: #842029;
    background-color: #f8d7da;
    border-color: #f5c2c7;
}

.alert-info {
    color: #055160;
    background-color: #d1ecf1;
    border-color: #bee5eb;
}

/* ========== 進度條樣式 ========== */
.progress {
    display: flex;
    height: 1rem;
    overflow: hidden;
    background-color: var(--bg-light);
    border-radius: var(--border-radius);
}

.progress-bar {
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow: hidden;
    color: var(--text-light);
    text-align: center;
    white-space: nowrap;
    background-color: var(--primary-color);
    transition: width 0.6s ease;
}

.progress-bar-striped {
    background-image: linear-gradient(45deg, rgba(255, 255, 255, 0.15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.15) 50%, rgba(255, 255, 255, 0.15) 75%, transparent 75%, transparent);
    background-size: 1rem 1rem;
}

.progress-bar-animated {
    animation: progress-bar-stripes 1s linear infinite;
}

@keyframes progress-bar-stripes {
    0% {
        background-position-x: 1rem;
    }
}

/* ========== 載入動畫 ========== */
.loading-spinner {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border: 0.125rem solid var(--border-light);
    border-right-color: transparent;
    border-radius: 50%;
    animation: spinner-border 0.75s linear infinite;
}

@keyframes spinner-border {
    to {
        transform: rotate(360deg);
    }
}

.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* ========== 工具提示 ========== */
.tooltip {
    position: relative;
}

.tooltip::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    padding: 0.5rem;
    background-color: var(--dark-color);
    color: var(--text-light);
    font-size: var(--font-size-sm);
    border-radius: var(--border-radius);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
    z-index: var(--z-tooltip);
}

.tooltip::after {
    content: '';
    position: absolute;
    bottom: 115%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: var(--dark-color);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.tooltip:hover::before,
.tooltip:hover::after {
    opacity: 1;
}

/* ========== 響應式工具類 ========== */
.d-none { display: none !important; }
.d-block { display: block !important; }
.d-inline { display: inline !important; }
.d-inline-block { display: inline-block !important; }
.d-flex { display: flex !important; }
.d-grid { display: grid !important; }

.justify-content-start { justify-content: flex-start !important; }
.justify-content-center { justify-content: center !important; }
.justify-content-end { justify-content: flex-end !important; }
.justify-content-between { justify-content: space-between !important; }

.align-items-start { align-items: flex-start !important; }
.align-items-center { align-items: center !important; }
.align-items-end { align-items: flex-end !important; }

.text-start { text-align: left !important; }
.text-center { text-align: center !important; }
.text-end { text-align: right !important; }

.w-100 { width: 100% !important; }
.h-100 { height: 100% !important; }

/* 間距工具類 */
.m-0 { margin: 0 !important; }
.m-1 { margin: var(--spacing-xs) !important; }
.m-2 { margin: var(--spacing-sm) !important; }
.m-3 { margin: var(--spacing-md) !important; }
.m-4 { margin: var(--spacing-lg) !important; }
.m-5 { margin: var(--spacing-xl) !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: var(--spacing-xs) !important; }
.mb-2 { margin-bottom: var(--spacing-sm) !important; }
.mb-3 { margin-bottom: var(--spacing-md) !important; }
.mb-4 { margin-bottom: var(--spacing-lg) !important; }
.mb-5 { margin-bottom: var(--spacing-xl) !important; }

.mt-0 { margin-top: 0 !important; }
.mt-1 { margin-top: var(--spacing-xs) !important; }
.mt-2 { margin-top: var(--spacing-sm) !important; }
.mt-3 { margin-top: var(--spacing-md) !important; }
.mt-4 { margin-top: var(--spacing-lg) !important; }
.mt-5 { margin-top: var(--spacing-xl) !important; }

.p-0 { padding: 0 !important; }
.p-1 { padding: var(--spacing-xs) !important; }
.p-2 { padding: var(--spacing-sm) !important; }
.p-3 { padding: var(--spacing-md) !important; }
.p-4 { padding: var(--spacing-lg) !important; }
.p-5 { padding: var(--spacing-xl) !important; }

/* ========== Footer 專用樣式修復 ========== */
footer {
    margin-top: auto;
    flex-shrink: 0;
    width: 100%;
}

/* 如果 footer 有特定的class，也添加相同規則 */
.footer,
.site-footer,
.main-footer {
    margin-top: auto;
    flex-shrink: 0;
    width: 100%;
}

/* 確保頁面內容不會影響 footer 位置 */
.content-wrapper {
    flex: 1 0 auto;
    display: flex;
    flex-direction: column;
}

/* ========== 響應式中斷點 ========== */
@media (max-width: 576px) {
    .d-sm-none { display: none !important; }
    .d-sm-block { display: block !important; }
    .text-sm-center { text-align: center !important; }
    
    .image-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .d-md-none { display: none !important; }
    .d-md-block { display: block !important; }
    .text-md-center { text-align: center !important; }
    
    h1 { font-size: var(--font-size-3xl); }
    h2 { font-size: var(--font-size-2xl); }
    h3 { font-size: var(--font-size-xl); }
    
    .container {
        padding-left: var(--spacing-md);
        padding-right: var(--spacing-md);
    }
}

@media (max-width: 992px) {
    .d-lg-none { display: none !important; }
    .d-lg-block { display: block !important; }
    .text-lg-center { text-align: center !important; }
}

@media (max-width: 1200px) {
    .d-xl-none { display: none !important; }
    .d-xl-block { display: block !important; }
    .text-xl-center { text-align: center !important; }
}

/* ========== 印刷樣式 ========== */
@media print {
    .d-print-none { display: none !important; }
    .d-print-block { display: block !important; }
    
    * {
        color: #000 !important;
        background: transparent !important;
        box-shadow: none !important;
    }
    
    .btn {
        display: none;
    }
    
    .card {
        border: 1px solid #ccc;
    }
}

/* ========== 自定義滾動條 ========== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-light);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ========== 選擇文字樣式 ========== */
::selection {
    background-color: rgba(52, 152, 219, 0.3);
    color: var(--text-dark);
}

::-moz-selection {
    background-color: rgba(52, 152, 219, 0.3);
    color: var(--text-dark);
}

/* ========== 無障礙功能 ========== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.sr-only-focusable:active,
.sr-only-focusable:focus {
    position: static;
    width: auto;
    height: auto;
    overflow: visible;
    clip: auto;
    white-space: normal;
}

/* 減少動畫效果 (尊重用戶偏好) */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* ========== 深色模式支援 ========== */
@media (prefers-color-scheme: dark) {
    :root {
        --text-dark: #e1e5e9;
        --text-muted: #a8b2bd;
        --bg-primary: #1a1d23;
        --bg-secondary: #252930;
        --bg-light: #2f3338;
        --border-color: #404448;
        --border-light: #353840;
    }
    
    .card {
        background-color: var(--bg-secondary);
    }
    
    .form-control {
        background-color: var(--bg-light);
        color: var(--text-dark);
    }
    
    .table {
        color: var(--text-dark);
    }
}

/* ========== 動畫效果庫 ========== */
.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.slide-in-left {
    animation: slideInLeft 0.5s ease-out;
}

.slide-in-right {
    animation: slideInRight 0.5s ease-out;
}

.bounce-in {
    animation: bounceIn 0.8s ease-out;
}

.pulse {
    animation: pulse 2s infinite;
}

.shake {
    animation: shake 0.5s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

/* ========== 懸停效果增強 ========== */
.hover-lift {
    transition: transform var(--transition-normal);
}

.hover-lift:hover {
    transform: translateY(-4px);
}

.hover-shadow {
    transition: box-shadow var(--transition-normal);
}

.hover-shadow:hover {
    box-shadow: var(--shadow-lg);
}

.hover-scale {
    transition: transform var(--transition-normal);
}

.hover-scale:hover {
    transform: scale(1.05);
}

/* ========== 效能優化 ========== */
.will-change-transform {
    will-change: transform;
}

.will-change-opacity {
    will-change: opacity;
}

.gpu-accelerated {
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000px;
}