/* ============================================================
 * 全站统一设计令牌与组件覆盖
 * 主色系：Tailwind-blue #3B82F6（blue-500，经典浅蓝）
 * 目标：member/ucenter、download、private、exam、ContractPage、MotorPage
 * ============================================================ */

/* ---------- 1. 设计令牌（CSS 变量） ---------- */
:root {
    /* 主色系 */
    --design-primary:        #3B82F6;   /* primary 500 经典浅蓝 */
    --design-primary-light:  #60A5FA;   /* primary 400 hover态 */
    --design-primary-dark:   #2563EB;   /* primary 600 深态 */
    --design-primary-bg:     #EFF6FF;   /* primary 50  (用于 hover/背景) */
    --design-primary-hover:  #DBEAFE;   /* primary 100 */
    --design-primary-ring:   rgba(59, 130, 246, 0.20); /* focus 外环 */

    /* 语义色 */
    --design-success:        #16A34A;
    --design-success-bg:     #F0FDF4;
    --design-warning:        #D97706;
    --design-warning-bg:     #FFFBEB;
    --design-danger:         #DC2626;
    --design-danger-bg:      #FEF2F2;

    /* 中性色 */
    --design-text:           #1F2937;   /* 主文字 */
    --design-text-muted:     #6B7280;   /* 次要文字 */
    --design-text-soft:      #9CA3AF;   /* 弱化文字 */
    --design-border:         #E5E7EB;   /* 边框 */
    --design-border-light:   #F3F4F6;   /* 淡边框 / 交替行 */
    --design-bg:             #FFFFFF;
    --design-bg-gray:        #F9FAFB;

    /* 圆角 */
    --design-radius-sm:      4px;
    --design-radius:         6px;
    --design-radius-lg:      8px;
    --design-radius-xl:      12px;

    /* 阴影 */
    --design-shadow:         0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --design-shadow-sm:      0 1px 2px rgba(0,0,0,0.04);
    --design-shadow-md:      0 4px 12px rgba(0,0,0,0.08);
    --design-shadow-lg:      0 8px 24px rgba(0,0,0,0.10);

    /* 间距 (基础单位) */
    --design-space-1: 4px;
    --design-space-2: 8px;
    --design-space-3: 12px;
    --design-space-4: 16px;
    --design-space-5: 20px;
    --design-space-6: 24px;
    --design-space-8: 32px;

    /* 字体 */
    --design-font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    --design-font-size-sm: 12px;
    --design-font-size-base: 14px;
    --design-font-size-lg: 16px;
    --design-line-height: 1.6;

    /* 过渡 */
    --design-transition: all 0.15s ease;
    --design-transition-fast: all 0.12s ease;
}

/* ---------- 2. 全站字体与基础 ---------- */
body {
    font-family: var(--design-font-family);
    color: var(--design-text);
    font-size: var(--design-font-size-base);
    line-height: var(--design-line-height);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ---------- 3. 顶导航条 ---------- */
.navbar.fixed-top {
    border-bottom: 1px solid var(--design-border-light);
    box-shadow: var(--design-shadow-sm) !important;
}
.navbar .nav-link {
    font-weight: 500;
    color: var(--design-text);
}
.navbar .nav-link:hover,
.navbar .nav-link.active {
    color: var(--design-primary);
}
.navbar .navbar-text a {
    color: var(--design-primary);
    font-weight: 500;
}

/* ---------- 4. 面包屑 ---------- */
.breadcrumb {
    background: transparent;
    padding: var(--design-space-2) 0;
    font-size: var(--design-font-size-sm);
    margin-bottom: 0;
}
.breadcrumb a {
    color: var(--design-text-muted);
}
.breadcrumb a:hover {
    color: var(--design-primary);
    text-decoration: none;
}
.breadcrumb .breadcrumb-item.active {
    color: var(--design-text);
    font-weight: 500;
}

/* ---------- 5. Bootstrap Card 覆盖 ---------- */
.card {
    border-radius: var(--design-radius-lg) !important;
    border: 1px solid var(--design-border-light) !important;
    box-shadow: var(--design-shadow-sm) !important;
    transition: box-shadow var(--design-transition);
}
.card:hover {
    box-shadow: var(--design-shadow) !important;
}
.card .card-header {
    border-bottom: 1px solid var(--design-border-light) !important;
    background: var(--design-bg-gray) !important;
    border-radius: var(--design-radius-lg) var(--design-radius-lg) 0 0 !important;
    font-weight: 600;
    color: var(--design-text);
}
.card .card-body {
    padding: var(--design-space-4);
}

/* ---------- 6. Bootstrap Button 覆盖 ---------- */
.btn {
    border-radius: var(--design-radius);
    font-weight: 500;
    font-size: var(--design-font-size-sm);
    transition: var(--design-transition);
}
.btn-primary,
.btn-info {
    background: var(--design-primary) !important;
    border-color: var(--design-border) !important;
}
.btn-primary:hover,
.btn-info:hover {
    background: var(--design-primary-light) !important;
    border-color: var(--design-border) !important;
}
.btn-outline-primary {
    color: var(--design-text) !important;          /* 黑色文字 */
    border-color: var(--design-border) !important; /* 灰色边框 */
    background: #fff !important;
}
.btn-outline-primary:hover {
    background: var(--design-primary-bg) !important;
    border-color: var(--design-primary) !important;
    color: var(--design-primary) !important;
}

/* ---------- 7. Bootstrap Table 覆盖 ---------- */
.table {
    color: var(--design-text);
    font-size: var(--design-font-size-base);
}
.table thead th {
    background: var(--design-bg-gray);
    color: var(--design-text-muted);
    font-weight: 600;
    font-size: var(--design-font-size-sm);
    border-bottom: 1px solid var(--design-border-light) !important;
    border-top: none !important;
    padding: 10px 12px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}
.table tbody td {
    padding: 10px 12px;
    border-color: var(--design-border-light);
    font-size: var(--design-font-size-base);
    vertical-align: middle;
}
.table tbody tr:hover {
    background: var(--design-primary-bg);
}
.table tbody tr:nth-child(even) {
    background: var(--design-bg-gray);
}
.table tbody tr:nth-child(even):hover {
    background: var(--design-primary-bg);
}

/* ---------- 8. Bootstrap List-Group (左侧导航) ---------- */
.list-group {
    border-radius: var(--design-radius-lg);
    border: 1px solid var(--design-border-light);
    box-shadow: var(--design-shadow-sm);
    overflow: hidden;
}
.list-group-item {
    border: none;
    border-bottom: 1px solid var(--design-border-light);
    padding: var(--design-space-3) var(--design-space-4);
    font-size: var(--design-font-size-base);
    color: var(--design-text);
    transition: var(--design-transition-fast);
}
.list-group-item:last-child {
    border-bottom: none;
}
.list-group-item:hover {
    background: var(--design-primary-bg);
    color: var(--design-primary);
    text-decoration: none;
}
.list-group-item i {
    width: 18px;
    display: inline-block;
    color: inherit;
    margin-right: var(--design-space-2);
}

/* ---------- 9. Bootstrap Dropdown ---------- */
.dropdown-menu {
    border: 1px solid var(--design-border-light);
    border-radius: var(--design-radius);
    box-shadow: var(--design-shadow-md);
    padding: 6px 0;
    font-size: var(--design-font-size-sm);
}
.dropdown-item {
    padding: 8px 16px;
    color: var(--design-text);
    transition: var(--design-transition-fast);
}
.dropdown-item:hover {
    background: var(--design-primary-bg);
    color: var(--design-primary);
}
.dropdown-divider {
    margin: 6px 0;
    border-top-color: var(--design-border-light);
}

/* ---------- 10. Bootstrap Form / Input ---------- */
.form-control {
    border: 1px solid var(--design-border);
    border-radius: var(--design-radius);
    font-size: var(--design-font-size-base);
    padding: 6px 10px;
    transition: var(--design-transition-fast);
}
.form-control:focus {
    border-color: var(--design-primary-light);
    box-shadow: 0 0 0 3px var(--design-primary-ring);
}
.form-control-sm {
    border-radius: var(--design-radius-sm);
    height: 32px;
    font-size: var(--design-font-size-sm);
}

/* ---------- 11. Bootstrap Alert ---------- */
.alert {
    border-radius: var(--design-radius-lg);
    border: none;
    box-shadow: var(--design-shadow-sm);
    font-size: var(--design-font-size-base);
}

/* ---------- 12. Container / Pages 容器 ---------- */
.container.pages {
    padding-top: var(--design-space-6);
    padding-bottom: var(--design-space-8);
}
.container.pages .row > .col-md-2,
.container.pages .row > .col-md-10 {
    margin-bottom: var(--design-space-6);
}

/* ---------- 13. 考试系统（exam 自定义组件覆盖） ---------- */
.exam-h1 {
    font-size: 22px;
    margin-bottom: 6px;
    color: var(--design-text);
    font-weight: 700;
}
.exam-sub {
    color: var(--design-text-muted);
    margin-bottom: 24px;
    font-size: var(--design-font-size-sm);
}
.exam-card {
    background: #fff;
    border-radius: var(--design-radius-lg);
    box-shadow: var(--design-shadow);
    border: 1px solid var(--design-border-light);
    padding: var(--design-space-4) var(--design-space-5);
    margin-bottom: var(--design-space-4);
    transition: var(--design-transition);
}
.exam-card:hover {
    box-shadow: var(--design-shadow-md);
    border-color: var(--design-primary-hover);
}
.exam-card h2 {
    font-size: 16px;
    font-weight: 700;
    margin: 0 0 var(--design-space-2);
    color: var(--design-text);
}
.exam-meta {
    color: var(--design-text-muted);
    font-size: var(--design-font-size-sm);
    margin-bottom: var(--design-space-3);
}
.exam-meta span {
    margin-right: var(--design-space-4);
}
.exam-take {
    display: flex;
    align-items: center;
    gap: var(--design-space-3);
    margin-top: var(--design-space-2);
}
.exam-btn {
    background: var(--design-primary);
    color: #fff;
    border: none;
    padding: 10px 24px;
    border-radius: var(--design-radius);
    cursor: pointer;
    font-size: var(--design-font-size-base);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    transition: var(--design-transition);
    font-weight: 500;
}
.exam-btn:hover {
    background: var(--design-primary-light);
    color: #fff;
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: var(--design-shadow-md);
}
.exam-empty {
    text-align: center;
    color: var(--design-text-soft);
    padding: 48px var(--design-space-4);
    font-size: var(--design-font-size-base);
}

/* 考试答题页 */
.exam-topbar {
    position: sticky;
    top: 71px;
    z-index: 99;
    background: var(--design-primary);
    color: #fff;
    padding: var(--design-space-3) var(--design-space-4);
    border-radius: var(--design-radius-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--design-shadow-md);
    margin-bottom: var(--design-space-4);
}
.exam-topbar .timer {
    font-size: 20px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    font-family: Consolas, Monaco, monospace;
    background: rgba(255,255,255,0.15);
    padding: 4px 12px;
    border-radius: var(--design-radius);
}
.exam-q {
    background: #fff;
    border-radius: var(--design-radius-lg);
    box-shadow: var(--design-shadow-sm);
    border: 1px solid var(--design-border-light);
    padding: var(--design-space-4) var(--design-space-5);
    margin: var(--design-space-4) 0;
    transition: var(--design-transition-fast);
}
.exam-q:hover {
    box-shadow: var(--design-shadow);
}
.exam-q .qt {
    font-weight: 600;
    margin-bottom: var(--design-space-3);
    color: var(--design-text);
    line-height: 1.5;
}
.exam-options label {
    display: block;
    padding: var(--design-space-2) var(--design-space-3);
    border: 1px solid var(--design-border);
    border-radius: var(--design-radius);
    margin-bottom: var(--design-space-2);
    cursor: pointer;
    font-size: var(--design-font-size-base);
    color: var(--design-text);
    transition: var(--design-transition-fast);
}
.exam-options label:hover {
    background: var(--design-primary-bg);
    border-color: var(--design-primary-light);
    color: var(--design-primary);
}
.exam-options label input {
    margin-right: var(--design-space-2);
    accent-color: var(--design-primary);
}
.exam-badge {
    font-size: var(--design-font-size-sm);
    color: var(--design-primary);
    border: 1px solid var(--design-primary);
    border-radius: var(--design-radius-sm);
    padding: 1px 8px;
    margin-left: var(--design-space-2);
    font-weight: 500;
    display: inline-block;
}
.exam-score-tag {
    font-size: var(--design-font-size-sm);
    color: var(--design-warning);
    border: 1px solid var(--design-warning);
    border-radius: var(--design-radius-sm);
    padding: 1px 8px;
    margin-left: var(--design-space-2);
    font-weight: 500;
    display: inline-block;
}
.exam-submit-bar {
    text-align: center;
    margin: var(--design-space-6) 0;
}

/* ---------- 14. 电机面价页面卡片（外层） ---------- */
#motor-page .card,
#contract-page .card,
#pdf-page .card {
    border-radius: var(--design-radius-lg) !important;
    border: 1px solid var(--design-border-light) !important;
    box-shadow: var(--design-shadow) !important;
}
#motor-page h5,
#contract-page h5,
#pdf-page h5 {
    color: var(--design-text);
    font-weight: 700;
    padding-left: var(--design-space-3);
    border-left: 3px solid var(--design-primary);
    margin-bottom: var(--design-space-4);
}

/* ---------- 16. 合同分析 iframe 容器 ---------- */
.member-contract-frame {
    width: 100%;
    border: none;
    min-height: 600px;
    display: block;
    border-radius: 0 0 var(--design-radius-lg) var(--design-radius-lg);
}
.btn-contract-maximize {
    float: right;
    padding: 4px 12px;
    font-size: var(--design-font-size-sm);
    cursor: pointer;
    border: 1px solid var(--design-border);
    background: #fff;
    border-radius: var(--design-radius);
    color: var(--design-text-muted);
    margin-left: var(--design-space-2);
    transition: var(--design-transition-fast);
}
.btn-contract-maximize:hover {
    background: var(--design-primary-bg);
    border-color: var(--design-primary-light);
    color: var(--design-primary);
}

/* ---------- 17. 响应式补充 ---------- */
@media (max-width: 768px) {
    .container.pages {
        padding-top: var(--design-space-4);
        padding-bottom: var(--design-space-6);
    }
    .exam-topbar {
        flex-direction: column;
        gap: var(--design-space-2);
        text-align: center;
    }
    .exam-meta span {
        display: inline-block;
        margin-bottom: var(--design-space-1);
    }
    .card .card-body {
        padding: var(--design-space-3);
    }
}