/* =========================================================
   林克生物官网 - 自定义样式
   品牌色：红色系（基于Logo #E8334A / #D63031）
   ========================================================= */

/* 全局 */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: #2c2c2c;
    line-height: 1.6;
}

/* ===== 品牌色变量 ===== */
:root {
    --brand-primary: #2970B7;
    --brand-accent: #1FB5A6;
    --brand-gradient: linear-gradient(135deg, #2970B7 0%, #1FB5A6 100%);
    --brand-dark: #1a4f7a;
    --brand-warm: #e8f4f8;
}

.bg-primary {
    background: var(--brand-gradient) !important;
}

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

.btn-primary {
    background: var(--brand-primary);
    border-color: var(--brand-primary);
}

.btn-primary:hover,
.btn-primary:focus {
    background: var(--brand-dark);
    border-color: var(--brand-dark);
}

.btn-outline-primary {
    color: var(--brand-primary);
    border-color: var(--brand-primary);
}

.btn-outline-primary:hover {
    background: var(--brand-primary);
    border-color: var(--brand-primary);
    color: #fff;
}

/* 导航栏 */
.navbar {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    background: var(--brand-gradient) !important;
}

.navbar-brand {
    font-size: 1.2rem;
}

.brand-icon img {
    height: 48px;
    width: auto;
}

.brand-text small {
    letter-spacing: 0.03em;
}

.nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    transition: all 0.2s;
}

.nav-link:hover {
    color: rgba(255, 255, 255, 0.85) !important;
}

.nav-link.active {
    color: #fff !important;
    position: relative;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 2px;
    background: #fff;
    border-radius: 1px;
}

/* Hero区 */
.hero-section {
    background: var(--brand-gradient);
    min-height: 60vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: radial-gradient(circle at 20% 50%, rgba(255,255,255,0.08) 0%, transparent 50%),
                      radial-gradient(circle at 80% 20%, rgba(255,255,255,0.06) 0%, transparent 40%);
}

.hero-section .container {
    position: relative;
    z-index: 1;
}

.min-vh-75 {
    min-height: 60vh;
}

/* 页面头部 */
.page-header {
    background: var(--brand-warm) !important;
    border-bottom: 1px solid #d4eaef;
}

/* 渐变文字 */
.gradient-text {
    background: linear-gradient(135deg, #ffffff 0%, #1FB5A6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 产品卡片 */
.product-card {
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    transition: all 0.3s ease;
    overflow: hidden;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(41, 112, 183, 0.15);
    border-color: var(--brand-accent);
}

.product-card .card-body {
    padding: 1.25rem;
}

.product-card .card-title {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.product-card .card-footer {
    padding: 0 1.25rem 1.25rem;
}

/* Badge */
.badge.bg-primary {
    background: var(--brand-gradient) !important;
}

/* 功能图标 */
.feature-icon {
    width: 70px;
    height: 70px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--brand-warm);
    box-shadow: 0 4px 15px rgba(41, 112, 183, 0.1);
}

.feature-icon i {
    font-size: 1.8rem;
    background: var(--brand-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* 服务步骤圆圈 */
.step-circle {
    width: 50px;
    height: 50px;
    background: var(--brand-gradient);
    color: #fff;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: bold;
}

/* 表格 */
.table th {
    font-weight: 500;
}

.table td {
    vertical-align: middle;
}

/* CTA */
.cta-section {
    background: var(--brand-gradient);
}

/* 页脚 */
footer a.hover-white:hover {
    color: #fff !important;
}

footer {
    background: var(--brand-dark) !important;
}

/* 文章 */
.article-content {
    font-size: 1.05rem;
    line-height: 1.8;
}

.article-content h2,
.article-content h3 {
    margin-top: 1.5rem;
    margin-bottom: 1rem;
}

/* 面包屑 */
.breadcrumb {
    font-size: 0.85rem;
}

.breadcrumb a {
    color: var(--brand-primary);
}

/* 分页 */
.pagination .page-link {
    color: var(--brand-primary);
}

.pagination .page-item.active .page-link {
    background: var(--brand-primary);
    border-color: var(--brand-primary);
}

/* 折叠 */
.accordion-button:not(.collapsed) {
    background-color: var(--brand-warm);
    color: var(--brand-dark);
}

.accordion-button:focus {
    box-shadow: 0 0 0 0.25px rgba(41, 112, 183, 0.25);
}

/* 表单 */
.form-control:focus {
    border-color: var(--brand-accent);
    box-shadow: 0 0 0 0.2rem rgba(31, 181, 166, 0.25);
}

/* 链接 */
a {
    color: var(--brand-primary);
}

a:hover {
    color: var(--brand-accent);
}

/* 渐变分隔线 */
.brand-divider {
    height: 4px;
    background: var(--brand-gradient);
    border-radius: 2px;
    margin: 1rem 0;
}

/* 数字高亮 */
.stat-highlight {
    background: var(--brand-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
}

/* 页脚渐变线 */
.footer-gradient {
    height: 3px;
    background: var(--brand-gradient);
}

/* 响应式 */
@media (max-width: 768px) {
    .hero-section h1 {
        font-size: 1.8rem;
    }

    .hero-section {
        min-height: 50vh;
    }

    .product-card {
        margin-bottom: 1rem;
    }
}