/* ========================================
   研锦生物官网样式表 - 优化版
   Yangene Biotech Official Website Styles
   ======================================== */

:root {
    --primary-color: #0a4d8c;
    --primary-light: #1a6db8;
    --primary-dark: #063566;
    --accent-color: #00a86b;
    --accent-light: #00c97b;
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a5a;
    --text-light: #6a6a7a;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #e0e0e5;
    --font-cn: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-en: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s ease;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-en); font-size: 15px; line-height: 1.6; color: var(--text-primary); background: var(--bg-white); }

.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }

/* 导航栏 */
.navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(255, 255, 255, 0.98); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border-color); }
.navbar .container { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.nav-brand { display: flex; align-items: center; gap: 0.8rem; }
.nav-brand a { display: flex; align-items: center; gap: 0.8rem; text-decoration: none; }
.logo-img { height: 60px; width: auto; border-radius: 4px; }
.logo-text-wrapper { display: flex; flex-direction: column; line-height: 1.2; }
.logo-text { font-size: 1.4rem; font-weight: 700; color: var(--primary-color); }
.logo-text-en { font-family: var(--font-en); font-size: 0.8rem; color: var(--text-light); letter-spacing: 0.5px; }
.nav-menu { display: flex; gap: 2rem; }
.nav-link { font-size: 0.95rem; font-weight: 500; color: var(--text-secondary); text-decoration: none; transition: var(--transition); }
.nav-link:hover { color: var(--primary-color); }
.nav-actions { display: flex; align-items: center; gap: 0.8rem; }
.lang-switch { padding: 0.4rem 0.8rem; font-size: 0.85rem; font-weight: 600; font-family: var(--font-en); color: var(--primary-color); background: transparent; border: 2px solid var(--primary-color); border-radius: var(--radius-sm); cursor: pointer; transition: var(--transition); }
.lang-switch:hover { background: var(--primary-color); color: white; }

/* 首页横幅 */
.hero { min-height: 65vh; display: flex; align-items: center; background: linear-gradient(135deg, #f0f4f8 0%, #e8f0f8 50%, #f0f8f4 100%); padding-top: 70px; }
.hero-content { max-width: 700px; }
.hero-title { font-size: 2.5rem; font-weight: 700; color: var(--primary-color); line-height: 1.2; margin-bottom: 0.5rem; }
.hero-subtitle { font-size: 1.4rem; font-weight: 600; color: var(--accent-color); margin-bottom: 0.8rem; }
.hero-desc { font-size: 1.05rem; color: var(--text-secondary); margin-bottom: 1.5rem; }
.hero-buttons { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 1.5rem; }

/* 搜索框 */
.search-box { display: flex; align-items: center; background: var(--bg-white); border-radius: 50px; padding: 0.5rem; box-shadow: var(--shadow-md); max-width: 500px; margin: 1rem 0; }
.search-box input { flex: 1; border: none; outline: none; padding: 0.6rem 1rem; font-size: 1rem; font-family: var(--font-en); background: transparent; }
.search-box input::placeholder { color: var(--text-light); }
.search-btn { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; background: var(--primary-color); border: none; border-radius: 50%; cursor: pointer; transition: var(--transition); }
.search-btn:hover { background: var(--primary-light); }
.search-btn span { font-size: 1.1rem; }

/* 按钮 */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 0.7rem 1.5rem; font-size: 0.95rem; font-weight: 600; text-decoration: none; border-radius: var(--radius-md); transition: var(--transition); cursor: pointer; border: none; }
.btn-primary { background: var(--primary-color); color: white; }
.btn-primary:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-outline { background: transparent; color: var(--primary-color); border: 2px solid var(--primary-color); }
.btn-outline:hover { background: var(--primary-color); color: white; }
.btn-full { width: 100%; }

/* 通用区块 */
.section-header { text-align: center; margin-bottom: 1.2rem; }
.section-title { font-size: 1.7rem; font-weight: 700; color: var(--text-primary); margin-bottom: 0.3rem; }
.section-subtitle { font-size: 1rem; color: var(--text-secondary); }

/* 快速导航 - 13个关键词 */
.quick-nav { padding: 2rem 0; background: var(--bg-white); border-bottom: 1px solid var(--border-color); }
.quick-nav .section-title { margin-bottom: 0.8rem; }
.keyword-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 0.6rem; }
.keyword-item { display: flex; align-items: center; gap: 0.4rem; padding: 0.6rem 0.8rem; background: var(--bg-light); border-radius: var(--radius-md); text-decoration: none; transition: var(--transition); border: 1px solid transparent; }
.keyword-item:hover { background: var(--bg-white); border-color: var(--primary-color); box-shadow: var(--shadow-sm); transform: translateY(-2px); }
.keyword-icon { font-size: 1.1rem; }
.keyword-text { font-size: 0.8rem; font-weight: 500; color: var(--text-primary); }

/* 服务内容详情 */
.services { padding: 2rem 0; background: var(--bg-light); }
.service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.service-block { background: var(--bg-white); border-radius: var(--radius-lg); padding: 1rem; box-shadow: var(--shadow-sm); transition: var(--transition); }
.service-block:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.service-block-highlight { border: 2px solid var(--accent-color); background: linear-gradient(135deg, #f0fff8 0%, #ffffff 100%); }
.service-header { display: flex; align-items: center; gap: 0.6rem; margin-bottom: 0.5rem; }
.service-number { display: inline-flex; align-items: center; justify-content: center; width: 28px; height: 28px; font-size: 0.85rem; font-weight: 700; font-family: var(--font-en); color: var(--primary-color); background: var(--bg-light); border-radius: 50%; }
.service-header h3 { font-size: 1rem; font-weight: 600; color: var(--text-primary); }
.service-header h3 a { color: inherit; text-decoration: none; }
.service-header h3 a:hover { color: var(--primary-color); }
.service-badge { display: inline-block; padding: 0.2rem 0.5rem; font-size: 0.7rem; font-weight: 600; color: white; background: var(--accent-color); border-radius: var(--radius-sm); margin-left: 0.5rem; }
.service-items-compact { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.service-link { padding: 0.25rem 0.6rem; font-size: 0.75rem; font-weight: 500; color: var(--text-secondary); background: var(--bg-light); border-radius: var(--radius-sm); text-decoration: none; transition: var(--transition); }
.service-link:hover { background: var(--primary-color); color: white; }

@media (max-width: 1024px) {
    .service-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
    .service-grid { grid-template-columns: 1fr; }
}

/* 核心优势 */
.advantages { padding: 2rem 0; background: var(--bg-white); }
.advantages-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.8rem; }
.advantage-card { padding: 1rem; background: var(--bg-light); border-radius: var(--radius-lg); text-align: center; transition: var(--transition); }
.advantage-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); background: var(--bg-white); }
.advantage-icon { font-size: 1.8rem; margin-bottom: 0.4rem; }
.advantage-card h3 { font-size: 0.95rem; font-weight: 600; color: var(--text-primary); margin-bottom: 0.2rem; }
.advantage-card p { font-size: 0.8rem; color: var(--text-secondary); }

/* 技术分享 */
.tech-sharing { padding: 2rem 0; background: var(--bg-white); }
.articles-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; min-height: 100px; }

.article-card { background: var(--bg-white); border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border-color); transition: var(--transition); cursor: pointer; text-decoration: none; color: inherit; display: flex; flex-direction: column; }
.article-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--primary-color); }

.article-card-image { width: 100%; height: 160px; object-fit: cover; display: block; background: var(--bg-light); }
.article-card-placeholder { width: 100%; height: 160px; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, #e8f0f8 0%, #f0f8f4 100%); font-size: 2.5rem; }
.article-card-body { padding: 1rem; flex: 1; display: flex; flex-direction: column; }
.article-card-meta { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.5rem; }
.article-card-date { font-size: 0.75rem; color: var(--text-light); font-family: var(--font-en); }
.article-card-tag { display: inline-block; padding: 0.1rem 0.4rem; font-size: 0.65rem; font-weight: 600; color: var(--primary-color); background: rgba(10, 77, 140, 0.08); border-radius: var(--radius-sm); }
.article-card-title { font-size: 0.95rem; font-weight: 600; color: var(--text-primary); line-height: 1.4; margin-bottom: 0.4rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.article-card-summary { font-size: 0.8rem; color: var(--text-secondary); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; flex: 1; }
.article-card-footer { display: flex; align-items: center; justify-content: space-between; margin-top: 0.6rem; padding-top: 0.5rem; border-top: 1px solid var(--border-color); }
.article-card-author { font-size: 0.75rem; color: var(--text-light); }
.article-card-readmore { font-size: 0.75rem; font-weight: 600; color: var(--primary-color); text-decoration: none; transition: var(--transition); }
.article-card-readmore:hover { color: var(--primary-light); }

.article-loading { grid-column: 1 / -1; display: flex; align-items: center; justify-content: center; padding: 2rem; }
.loading-spinner { display: inline-block; width: 28px; height: 28px; border: 3px solid var(--border-color); border-top-color: var(--primary-color); border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.articles-empty { grid-column: 1 / -1; text-align: center; padding: 2rem; color: var(--text-light); font-size: 0.9rem; }

@media (max-width: 1024px) {
    .articles-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
    .articles-grid { grid-template-columns: 1fr; }
}

/* 技术平台滚动展示 */
.tech-platforms { padding: 2rem 0; background: var(--bg-light); }
.platform-slider { overflow: hidden; position: relative; }
.slider-track { display: flex; gap: 1rem; animation: slideScroll 25s linear infinite; }
.slider-track:hover { animation-play-state: paused; }
.slide-item { flex: 0 0 220px; background: var(--bg-white); border-radius: var(--radius-lg); overflow: hidden; text-decoration: none; transition: var(--transition); box-shadow: var(--shadow-sm); }
.slide-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.slide-item img { width: 100%; height: 140px; object-fit: cover; display: block; }
.slide-label { padding: 0.6rem; font-size: 0.8rem; font-weight: 500; color: var(--text-primary); text-align: center; background: var(--bg-white); }

@keyframes slideScroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* 关于我们 */
.about { padding: 2rem 0; background: var(--bg-white); }
.about-content { display: grid; grid-template-columns: 2fr 1fr; gap: 1.5rem; align-items: center; }
.about-text p { font-size: 0.95rem; color: var(--text-secondary); margin-bottom: 0.6rem; line-height: 1.7; }
.about-stats { display: flex; gap: 0.8rem; }
.stat-item { flex: 1; text-align: center; padding: 0.8rem; background: var(--bg-light); border-radius: var(--radius-lg); }
.stat-number { display: block; font-size: 1.8rem; font-weight: 700; font-family: var(--font-en); color: var(--primary-color); line-height: 1; }
.stat-label { font-size: 0.8rem; color: var(--text-secondary); margin-top: 0.2rem; }

/* 联系我们 */
.contact { padding: 2rem 0; background: var(--bg-light); }
.contact-content { display: grid; grid-template-columns: 1fr 1.2fr; gap: 1.5rem; }
.contact-info { display: flex; flex-direction: column; gap: 0.6rem; }
.company-name { font-size: 1.2rem; font-weight: 700; color: var(--primary-color); margin-bottom: 0.3rem; }
.contact-item { display: flex; align-items: flex-start; gap: 0.6rem; }
.contact-icon { font-size: 1.1rem; width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; background: var(--bg-white); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); }
.contact-text h4 { font-size: 0.8rem; font-weight: 600; color: var(--text-primary); margin-bottom: 0.1rem; }
.contact-text p { font-size: 0.85rem; color: var(--text-secondary); }
.wechat-section { flex-direction: column; align-items: flex-start; }
.qrcode-box { margin-top: 0.5rem; display: inline-block; }
.qrcode-img { width: 180px; height: auto; border-radius: var(--radius-sm); box-shadow: var(--shadow-sm); }

/* 微信公众号二维码 */
.wechat-qrcode { margin-top: 1rem; padding: 1rem; background: var(--bg-white); border-radius: var(--radius-lg); text-align: center; }
.wechat-qrcode h4 { font-size: 0.9rem; font-weight: 600; color: var(--text-primary); margin-bottom: 0.5rem; }
.qrcode-images { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; }
.qrcode-images img { width: 150px; height: 150px; object-fit: contain; border-radius: var(--radius-sm); }

/* 表单 */
.contact-form { background: var(--bg-white); padding: 1.2rem; border-radius: var(--radius-lg); box-shadow: var(--shadow-md); }
.form-group { position: relative; margin-bottom: 0.8rem; }
.form-group input, .form-group textarea { width: 100%; padding: 0.7rem; font-size: 0.9rem; font-family: var(--font-en); color: var(--text-primary); background: var(--bg-light); border: 2px solid transparent; border-radius: var(--radius-md); transition: var(--transition); resize: none; }
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--primary-color); background: var(--bg-white); }
.form-group label { position: absolute; top: 0.7rem; left: 0.7rem; font-size: 0.9rem; color: var(--text-light); pointer-events: none; transition: var(--transition); }
.form-group input:focus + label, .form-group input:not(:placeholder-shown) + label, .form-group textarea:focus + label, .form-group textarea:not(:placeholder-shown) + label { top: -0.5rem; left: 0.6rem; font-size: 0.75rem; color: var(--primary-color); background: var(--bg-white); padding: 0 0.3rem; }

/* 页脚 */
.footer { background: var(--text-primary); color: white; padding: 1.2rem 0; }
.footer-content { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 1.2rem; margin-bottom: 0.8rem; }
.footer-brand .logo-text { color: white; font-size: 1.2rem; }
.footer-brand .logo-text-en { color: rgba(255, 255, 255, 0.6); }
.footer-brand p { margin-top: 0.4rem; font-size: 0.85rem; color: rgba(255, 255, 255, 0.7); }
.footer-links h4, .footer-services h4 { font-size: 0.9rem; font-weight: 600; margin-bottom: 0.4rem; color: white; }
.footer-links a, .footer-services a { display: block; font-size: 0.8rem; color: rgba(255, 255, 255, 0.7); text-decoration: none; margin-bottom: 0.2rem; transition: var(--transition); }
.footer-links a:hover, .footer-services a:hover { color: white; }
.footer-bottom { padding-top: 0.8rem; border-top: 1px solid rgba(255, 255, 255, 0.1); text-align: center; }
.footer-bottom p { font-size: 0.75rem; color: rgba(255, 255, 255, 0.6); }

/* 响应式 */
@media (max-width: 1024px) {
    .about-content { grid-template-columns: 1fr; }
    .about-stats { flex-direction: row; }
    .contact-content { grid-template-columns: 1fr; }
    .footer-content { grid-template-columns: 1fr 1fr; }
    .advantages-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .navbar .container { height: 60px; }
    .nav-menu { display: none; }
    .hero { min-height: 55vh; padding-top: 60px; }
    .hero-title { font-size: 1.8rem; }
    .hero-subtitle { font-size: 1.1rem; }
    .section-title { font-size: 1.4rem; }
    .advantages-grid { grid-template-columns: repeat(2, 1fr); }
    .keyword-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-content { grid-template-columns: 1fr; }
    .logo-img { height: 50px; }
    .logo-text { font-size: 1.2rem; }
}

@media (max-width: 480px) {
    .container { padding: 0 1rem; }
    .hero-title { font-size: 1.5rem; }
    .hero-buttons { flex-direction: column; }
    .btn { width: 100%; }
    .advantages-grid { grid-template-columns: 1fr; }
    .keyword-grid { grid-template-columns: 1fr; }
    .about-stats { flex-direction: column; }
    .search-box { max-width: 100%; }
}

/* 动画 */
@keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.hero-content { animation: fadeInUp 0.6s ease-out; }