/* ============================================================
   闽西职业技术学院汀州校区 - 设计系统 v1.0
   统一设计规范：颜色、字体、间距、按钮、卡片等
   ============================================================ */

/* ==================== 设计令牌（Design Tokens）==================== */
:root {
    /* 主色调：深海蓝 */
    --primary:        #1a3a6e;
    --primary-dark:    #0f2447;
    --primary-light:   #2a5298;
    --primary-bg:      rgba(26,58,110,0.04);
    --primary-bg-hover:rgba(26,58,110,0.08);
    
    /* 强调色：中国红 */
    --accent:         #c41e3a;
    --accent-light:   #e74c5e;
    --accent-bg:      rgba(196,30,58,0.06);
    
    /* 金色点缀 */
    --gold:           #c9a227;
    --gold-light:      #e0c054;
    --gold-bg:        rgba(201,162,39,0.08);
    
    /* 成功/警告/错误 */
    --success:        #27ae60;
    --warning:        #f39c12;
    --danger:         #e74c3c;
    --info:           #3498db;
    
    /* 文字色系 */
    --text:           #2c3e50;
    --text-dark:      #1a1a2e;
    --text-medium:    #555;
    --text-light:     #8e99a4;
    --text-lighter:   #b0b8c1;
    --text-white:     #ffffff;
    
    /* 背景色系 */
    --bg-page:       #f0f2f5;
    --bg-white:      #ffffff;
    --bg-card:       #ffffff;
    --bg-hover:      #f7f8fa;
    --bg-dark:       #1a1a2e;
    --bg-gradient:    linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, #0d1b33 100%);
    
    /* 边框 */
    --border:        #e8ecf1;
    --border-light:   #f0f2f5;
    --border-dark:    #d0d5dd;
    
    /* 阴影系统 */
    --shadow-xs:     0 1px 2px rgba(0,0,0,0.04);
    --shadow-sm:     0 1px 3px rgba(0,0,0,0.06);
    --shadow:        0 2px 12px rgba(0,0,0,0.07);
    --shadow-md:     0 4px 20px rgba(0,0,0,0.09);
    --shadow-lg:     0 8px 40px rgba(0,0,0,0.12);
    --shadow-xl:     0 20px 60px rgba(0,0,0,0.15);
    
    /* 圆角 */
    --radius-xs:     4px;
    --radius-sm:     6px;
    --radius:        10px;
    --radius-md:     14px;
    --radius-lg:     20px;
    --radius-xl:     28px;
    --radius-full:    999px;
    
    /* 动画 */
    --transition-fast:   0.15s ease;
    --transition:        0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow:   0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    
    /* 间距 */
    --space-xs:      8px;
    --space-sm:      12px;
    --space:         20px;
    --space-md:      28px;
    --space-lg:      40px;
    --space-xl:      60px;
    
    /* 字体 */
    --font-base:     15px;
    --font-scale:    1.25;
    --line-height:   1.7;
    --touch-target:   44px;
    --max-width:     1280px;
}

/* ==================== 字体系统 ==================== */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    font-size: var(--font-base);
    line-height: var(--line-height);
    color: var(--text);
    background: var(--bg-page);
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-dark);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 0.5em;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

/* ==================== 按钮系统 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 600;
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    letter-spacing: 0.3px;
}

.btn-primary {
    background: var(--primary);
    color: var(--text-white);
    border-color: var(--primary);
    box-shadow: 0 3px 12px rgba(26,58,110,0.25);
}

.btn-primary:hover {
    background: var(--primary-light);
    border-color: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(26,58,110,0.35);
}

.btn-secondary {
    background: var(--bg-white);
    color: var(--primary);
    border-color: var(--primary);
}

.btn-secondary:hover {
    background: var(--primary-bg);
    transform: translateY(-2px);
}

.btn-accent {
    background: var(--accent);
    color: var(--text-white);
    border-color: var(--accent);
}

.btn-accent:hover {
    background: var(--accent-light);
    border-color: var(--accent-light);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--text-white);
    border-color: rgba(255,255,255,0.5);
}

.btn-outline:hover {
    background: rgba(255,255,255,0.15);
    border-color: var(--text-white);
    transform: translateY(-2px);
}

.btn-gold {
    background: var(--gold);
    color: var(--primary-dark);
    border-color: var(--gold);
    font-weight: 700;
}

.btn-gold:hover {
    background: var(--gold-light);
    border-color: var(--gold-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(201,162,39,0.4);
}

.btn-sm {
    padding: 6px 16px;
    font-size: 13px;
}

.btn-lg {
    padding: 14px 36px;
    font-size: 16px;
}

.btn-block {
    display: flex;
    width: 100%;
}

/* ==================== 卡片系统 ==================== */
.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.card-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-body {
    padding: 20px 24px;
}

.card-footer {
    padding: 14px 24px;
    border-top: 1px solid var(--border-light);
    background: var(--bg-hover);
}

/* ==================== 表单系统 ==================== */
.form-group {
    margin-bottom: var(--space);
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 6px;
}

.form-control {
    display: block;
    width: 100%;
    padding: 10px 14px;
    font-size: 14px;
    line-height: 1.5;
    color: var(--text);
    background: var(--bg-white);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26,58,110,0.12);
}

.form-control:hover:not(:focus) {
    border-color: var(--border-dark);
}

/* ==================== 表格系统 ==================== */
.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.data-table thead {
    background: var(--primary);
    color: var(--text-white);
}

.data-table th {
    padding: 12px 16px;
    font-size: 13px;
    font-weight: 600;
    text-align: left;
    letter-spacing: 0.3px;
}

.data-table tbody tr {
    border-bottom: 1px solid var(--border-light);
    transition: var(--transition-fast);
}

.data-table tbody tr:hover {
    background: var(--primary-bg);
}

.data-table tbody td {
    padding: 12px 16px;
    font-size: 14px;
    color: var(--text);
}

/* ==================== 徽章系统 ==================== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 10px;
    font-size: 11px;
    font-weight: 600;
    line-height: 1.8;
    border-radius: var(--radius-full);
}

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

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

.badge-success {
    background: rgba(39,174,96,0.1);
    color: var(--success);
}

.badge-warning {
    background: rgba(243,156,18,0.1);
    color: var(--warning);
}

.badge-danger {
    background: rgba(231,76,60,0.1);
    color: var(--danger);
}

/* ==================== 分页系统 ==================== */
.pagination {
    display: flex;
    align-items: center;
    gap: 6px;
    list-style: none;
}

.pagination a,
.pagination span {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 12px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text);
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: var(--transition);
}

.pagination a:hover {
    background: var(--primary-bg);
    color: var(--primary);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 3px 10px rgba(26,58,110,0.18);
}

.pagination .active {
    background: var(--primary);
    color: var(--text-white);
    border-color: var(--primary);
}

/* ==================== 动画工具类 ==================== */
.fade-in {
    animation: fadeInUp 0.5s ease both;
}

.fade-in-delay {
    animation: fadeInUp 0.5s ease 0.15s both;
}

.fade-in-slow {
    animation: fadeIn 0.8s ease both;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
}

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

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

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

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-10px); }
}

/* ==================== 滚动条美化 ==================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-page);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: #c0c6cc;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #8e99a4;
}

/* ==================== 图片懒加载 ==================== */
img.lazy {
    opacity: 0;
    transition: opacity 0.4s ease;
}

img.lazy.loaded {
    opacity: 1;
}

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

:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: 2px;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}