/* ========== 全局样式 ========== */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif; background: #0a1a0a; color: #e8e8e8; line-height: 1.8; font-size: 16px; }
a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
a:hover { color: #d4af37; }
img { max-width: 100%; height: auto; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ========== 顶部导航 ========== */
.header { background: linear-gradient(135deg, #0a1a0a 0%, #1a2f1a 50%, #0a1a0a 100%); border-bottom: 2px solid #d4af37; position: sticky; top: 0; z-index: 1000; }
.top-bar { background: #0d1f0d; padding: 8px 0; font-size: 13px; color: #8a9a8a; }
.top-bar .container { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px 20px; }
.top-bar span { margin: 0; }
.top-bar .phone-icon { color: #d4af37; }
.nav-main { display: flex; align-items: center; justify-content: space-between; padding: 10px 0; }
.logo { display: flex; align-items: center; }
.logo img { height: 60px; width: auto; }
.nav-menu { display: flex; list-style: none; gap: 5px; }
.nav-menu li a { display: block; padding: 10px 20px; color: #e8e8e8; font-size: 15px; border-radius: 5px; transition: all 0.3s; position: relative; }
.nav-menu li a:hover, .nav-menu li a.active { color: #d4af37; background: rgba(212,175,55,0.1); }
.nav-menu li a::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 0; height: 2px; background: #d4af37; transition: width 0.3s; }
.nav-menu li a:hover::after, .nav-menu li a.active::after { width: 60%; }

/* ========== 轮播/Banner区域 ========== */
.banner { position: relative; min-height: 500px; height: auto; overflow: hidden; background: linear-gradient(135deg, #0a1a0a, #1a3a1a, #0a2a0a); padding: 80px 0; }
.banner-content { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); text-align: center; z-index: 2; }
.banner h1 { font-size: 42px; color: #d4af37; text-shadow: 2px 2px 10px rgba(0,0,0,0.5); margin-bottom: 15px; letter-spacing: 3px; }
.banner .subtitle { font-size: 20px; color: #c8d8c8; margin-bottom: 10px; }
.banner .tagline { font-size: 16px; color: #8a9a8a; margin-bottom: 30px; }
.banner .btn-group { display: flex; gap: 20px; justify-content: center; }
.btn-primary { display: inline-block; padding: 14px 35px; background: linear-gradient(135deg, #d4af37, #b8960c); color: #0a1a0a; font-size: 16px; font-weight: bold; border-radius: 30px; border: none; cursor: pointer; transition: all 0.3s; }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 25px rgba(212,175,55,0.4); }
.btn-secondary { display: inline-block; padding: 14px 35px; background: transparent; color: #d4af37; font-size: 16px; font-weight: bold; border-radius: 30px; border: 2px solid #d4af37; cursor: pointer; transition: all 0.3s; }
.btn-secondary:hover { background: rgba(212,175,55,0.1); transform: translateY(-3px); }
.banner-particles { position: absolute; width: 100%; height: 100%; top: 0; left: 0; }
.particle { position: absolute; width: 4px; height: 4px; background: #d4af37; border-radius: 50%; opacity: 0.3; animation: float 6s infinite; }
@keyframes float { 0%, 100% { transform: translateY(0) rotate(0deg); opacity: 0.3; } 50% { transform: translateY(-100px) rotate(180deg); opacity: 0.8; } }

/* ========== 通用区块 ========== */
.section { padding: 60px 0; }
.section-dark { background: #0d1f0d; }
.section-title { text-align: center; margin-bottom: 50px; }
.section-title h2 { font-size: 32px; color: #d4af37; position: relative; display: inline-block; padding-bottom: 15px; }
.section-title h2::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 80px; height: 3px; background: linear-gradient(90deg, transparent, #d4af37, transparent); }
.section-title p { color: #8a9a8a; margin-top: 15px; font-size: 15px; }

/* ========== 特色服务 ========== */
.services-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 25px; }
.service-card { background: linear-gradient(135deg, #1a2f1a, #0d1f0d); border: 1px solid rgba(212,175,55,0.2); border-radius: 15px; padding: 35px 25px; text-align: center; transition: all 0.4s; position: relative; overflow: hidden; }
.service-card::before { content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%; background: linear-gradient(90deg, transparent, rgba(212,175,55,0.05), transparent); transition: left 0.6s; }
.service-card:hover::before { left: 100%; }
.service-card:hover { transform: translateY(-10px); border-color: #d4af37; box-shadow: 0 15px 40px rgba(212,175,55,0.15); }
.service-icon { font-size: 50px; margin-bottom: 20px; display: block; }
.service-card h3 { font-size: 20px; color: #d4af37; margin-bottom: 12px; }
.service-card p { color: #8a9a8a; font-size: 14px; line-height: 1.8; }

/* ========== 文章列表 ========== */
.articles-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.article-card { background: linear-gradient(135deg, #1a2f1a, #0d1f0d); border: 1px solid rgba(212,175,55,0.15); border-radius: 12px; overflow: hidden; transition: all 0.4s; }
.article-card:hover { transform: translateY(-8px); border-color: #d4af37; box-shadow: 0 12px 35px rgba(212,175,55,0.12); }
.article-img { height: 200px; background: linear-gradient(135deg, #1a3a1a, #0d2a0d); display: flex; align-items: center; justify-content: center; font-size: 60px; position: relative; overflow: hidden; }
.article-img::after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 60px; background: linear-gradient(transparent, #1a2f1a); }
.article-body { padding: 25px; }
.article-body h3 { font-size: 18px; color: #d4af37; margin-bottom: 10px; line-height: 1.5; }
.article-body p { color: #8a9a8a; font-size: 14px; line-height: 1.8; margin-bottom: 15px; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.article-meta { display: flex; justify-content: space-between; color: #5a6a5a; font-size: 12px; border-top: 1px solid rgba(212,175,55,0.1); padding-top: 12px; }
.read-more { color: #d4af37; font-weight: bold; }

/* ========== 栏目导航 ========== */
.cat-nav { display: flex; gap: 15px; margin-bottom: 40px; flex-wrap: wrap; justify-content: center; }
.cat-nav a { padding: 10px 25px; background: rgba(212,175,55,0.1); border: 1px solid rgba(212,175,55,0.3); border-radius: 25px; color: #c8d8c8; transition: all 0.3s; }
.cat-nav a:hover, .cat-nav a.active { background: linear-gradient(135deg, #d4af37, #b8960c); color: #0a1a0a; font-weight: bold; border-color: #d4af37; }

/* ========== 关于我们 ========== */
.about-content { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.about-img { height: 400px; background: linear-gradient(135deg, #1a3a1a, #0d2a0d); border-radius: 15px; border: 2px solid rgba(212,175,55,0.2); display: flex; align-items: center; justify-content: center; font-size: 80px; }
.about-text h2 { font-size: 30px; color: #d4af37; margin-bottom: 20px; }
.about-text p { color: #b8c8b8; margin-bottom: 15px; line-height: 2; }
.about-features { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 30px; }
.about-feature { display: flex; align-items: center; gap: 12px; }
.about-feature .icon { font-size: 30px; }
.about-feature .text h4 { color: #d4af37; font-size: 16px; }
.about-feature .text p { color: #8a9a8a; font-size: 13px; }

/* ========== 联系我们 ========== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; }
.contact-info { display: flex; flex-direction: column; gap: 25px; }
.contact-item { display: flex; align-items: center; gap: 20px; background: linear-gradient(135deg, #1a2f1a, #0d1f0d); border: 1px solid rgba(212,175,55,0.2); border-radius: 12px; padding: 25px; transition: all 0.3s; }
.contact-item:hover { border-color: #d4af37; transform: translateX(5px); }
.contact-icon { font-size: 40px; }
.contact-detail h4 { color: #d4af37; font-size: 18px; margin-bottom: 5px; }
.contact-detail p { color: #8a9a8a; }
.contact-form { background: linear-gradient(135deg, #1a2f1a, #0d1f0d); border: 1px solid rgba(212,175,55,0.2); border-radius: 15px; padding: 40px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; color: #d4af37; margin-bottom: 8px; font-size: 14px; }
.form-group input, .form-group textarea { width: 100%; padding: 12px 18px; background: #0a1a0a; border: 1px solid rgba(212,175,55,0.3); border-radius: 8px; color: #e8e8e8; font-size: 15px; transition: border-color 0.3s; }
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: #d4af37; }
.form-group textarea { height: 120px; resize: vertical; }

/* ========== 悬浮按钮 ========== */
.floating-btns { position: fixed; right: 20px; bottom: 100px; z-index: 9999; display: flex; flex-direction: column; gap: 12px; }
.float-btn { width: 56px; height: 56px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 24px; color: #fff; cursor: pointer; transition: all 0.3s; box-shadow: 0 4px 15px rgba(0,0,0,0.3); position: relative; }
.float-btn:hover { transform: scale(1.15); }
.float-btn.qq-btn { background: linear-gradient(135deg, #4a9eff, #2176d4); }
.float-btn.phone-btn { background: linear-gradient(135deg, #d4af37, #b8960c); animation: pulse 2s infinite; }
.float-btn.wechat-btn { background: linear-gradient(135deg, #07c55e, #06a84e); }
.float-btn .tooltip { position: absolute; right: 65px; background: #1a2f1a; color: #d4af37; padding: 8px 15px; border-radius: 8px; font-size: 13px; white-space: nowrap; opacity: 0; pointer-events: none; transition: all 0.3s; border: 1px solid rgba(212,175,55,0.3); }
.float-btn:hover .tooltip { opacity: 1; right: 70px; }
@keyframes pulse { 0%, 100% { box-shadow: 0 4px 15px rgba(212,175,55,0.3); } 50% { box-shadow: 0 4px 25px rgba(212,175,55,0.6); } }

/* ========== 回到顶部 ========== */
.back-top { position: fixed; right: 20px; bottom: 30px; width: 45px; height: 45px; background: linear-gradient(135deg, #d4af37, #b8960c); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: #0a1a0a; font-size: 20px; cursor: pointer; opacity: 0; transition: all 0.3s; z-index: 999; }
.back-top.show { opacity: 1; }
.back-top:hover { transform: translateY(-5px); }

/* ========== 页脚 ========== */
.footer { background: linear-gradient(135deg, #0a150a, #0d1f0d); border-top: 2px solid #d4af37; padding: 50px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.footer-about h3, .footer-links h4 { color: #d4af37; margin-bottom: 20px; font-size: 18px; }
.footer-about p { color: #8a9a8a; font-size: 14px; line-height: 2; }
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: #8a9a8a; font-size: 14px; transition: color 0.3s; }
.footer-links a:hover { color: #d4af37; padding-left: 5px; }
.footer-bottom { border-top: 1px solid rgba(212,175,55,0.15); padding: 20px 0; text-align: center; }
.footer-bottom p { color: #5a6a5a; font-size: 13px; margin-bottom: 5px; }
.footer-bottom .keywords { color: #8a9a8a; font-size: 12px; display: flex; flex-wrap: wrap; justify-content: center; gap: 5px 10px; }
.footer-bottom .keywords a { color: #5a7a5a; margin: 0; }
.footer-bottom .keywords a:hover { color: #d4af37; }

/* ========== 文章详情页 ========== */
.article-detail { max-width: 900px; margin: 0 auto; }
.article-detail h1 { font-size: 30px; color: #d4af37; text-align: center; margin: 30px 0 15px; line-height: 1.5; }
.article-detail .article-info { text-align: center; color: #5a6a5a; font-size: 13px; margin-bottom: 30px; padding-bottom: 20px; border-bottom: 1px solid rgba(212,175,55,0.15); }
.article-detail .article-info span { margin: 0 10px; }
.article-detail .article-content { background: linear-gradient(135deg, #1a2f1a, #0d1f0d); border: 1px solid rgba(212,175,55,0.15); border-radius: 12px; padding: 40px; line-height: 2.2; color: #c8d8c8; }
.article-detail .article-content p { margin-bottom: 18px; text-indent: 2em; }
.article-detail .article-content h2 { color: #d4af37; font-size: 22px; margin: 25px 0 15px; padding-left: 15px; border-left: 4px solid #d4af37; }
.article-detail .article-content h3 { color: #c8d8c8; font-size: 18px; margin: 20px 0 10px; }
.article-detail .article-content img { border-radius: 8px; margin: 20px 0; }
.article-detail .article-content blockquote { border-left: 4px solid #d4af37; padding: 15px 20px; margin: 20px 0; background: rgba(212,175,55,0.05); border-radius: 0 8px 8px 0; }
.article-nav { display: flex; justify-content: space-between; margin-top: 40px; padding-top: 20px; border-top: 1px solid rgba(212,175,55,0.15); }
.article-nav a { color: #d4af37; }

/* ========== 面包屑导航 ========== */
.breadcrumb { padding: 15px 0; font-size: 14px; color: #5a6a5a; }
.breadcrumb a { color: #8a9a8a; }
.breadcrumb a:hover { color: #d4af37; }
.breadcrumb span { margin: 0 8px; }

/* ========== 响应式优化 ========== */
@media (max-width: 768px) {
    /* 导航栏：垂直堆叠，允许折行，不再隐藏 */
    .nav-main { flex-direction: column; gap: 12px; padding: 12px 0; }
    .nav-menu { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; padding: 0; }
    .nav-menu li a { padding: 8px 12px; font-size: 13px; }
    
    /* Banner：自适应高度，防止内容溢出 */
    .banner { min-height: 420px; padding: 60px 0; }
    .banner h1 { font-size: 24px; letter-spacing: 1px; }
    .banner .subtitle { font-size: 15px; }
    .banner .tagline { font-size: 13px; margin-bottom: 20px; }
    .banner .btn-group { flex-direction: column; align-items: center; gap: 12px; }
    .btn-primary, .btn-secondary { width: 85%; text-align: center; padding: 12px 0; font-size: 15px; }

    /* 统计栏：改为 2x2 网格 */
    .stats-bar { grid-template-columns: repeat(2, 1fr); gap: 20px; padding: 30px 0; }
    .stat-num { font-size: 28px; }
    .stat-label { font-size: 13px; }

    /* 服务卡片：改为 2 列 */
    .services-grid { grid-template-columns: repeat(2, 1fr); gap: 15px; }
    .service-card { padding: 25px 15px; }
    .service-icon { font-size: 36px; }
    .service-card h3 { font-size: 16px; }

    /* 悬浮按钮：缩小尺寸，下移防遮挡 */
    .floating-btns { right: 10px; bottom: 75px; gap: 10px; }
    .float-btn { width: 45px; height: 45px; font-size: 20px; }
    .float-btn .tooltip { display: none; }
    
    /* 推荐区：改为单列 */
    .recommend-grid { grid-template-columns: 1fr; gap: 15px; }
    .recommend-card { flex-direction: column; align-items: flex-start; padding: 20px; }
    .recommend-num { font-size: 28px; margin-bottom: 10px; }

    /* 布局单列化 */
    .articles-grid { grid-template-columns: 1fr; }
    .about-content { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    .about-features { grid-template-columns: 1fr; }
    
    /* 标题字号调整 */
    .section-title h2 { font-size: 22px; }
    .section-title p { font-size: 14px; }
}

/* ========== 小屏手机精细适配 (480px以下) ========== */
@media (max-width: 480px) {
    .container { padding: 0 15px; }
    .section { padding: 40px 0; }
    .section-title { margin-bottom: 30px; }
    .section-title h2 { font-size: 20px; }
    
    /* 服务卡片小屏单列 */
    .services-grid { grid-template-columns: 1fr; }
    
    /* 关于我们图片高度压缩 */
    .about-img { height: 220px; font-size: 60px; }
    .about-text h2 { font-size: 24px; }
    
    /* 页脚底部间距 */
    .footer { padding: 40px 0 0; }
    .back-top { right: 10px; bottom: 20px; width: 40px; height: 40px; font-size: 18px; }
}

/* ========== 金色渐变文字 ========== */
.gold-text { background: linear-gradient(135deg, #d4af37, #f0d060, #d4af37); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

/* ========== 加载动画 ========== */
.fade-in { opacity: 0; transform: translateY(30px); transition: all 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ========== 统计数字 ========== */
.stats-bar { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; padding: 40px 0; }
.stat-item { text-align: center; }
.stat-num { font-size: 42px; color: #d4af37; font-weight: bold; }
.stat-label { color: #8a9a8a; font-size: 14px; margin-top: 5px; }

/* ========== 推荐卡片 ========== */
.recommend-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 25px; }
.recommend-card { background: linear-gradient(135deg, #1a2f1a, #0d1f0d); border: 1px solid rgba(212,175,55,0.15); border-radius: 12px; padding: 30px; display: flex; gap: 20px; transition: all 0.3s; }
.recommend-card:hover { border-color: #d4af37; }
.recommend-num { font-size: 36px; color: #d4af37; font-weight: bold; min-width: 50px; }
.recommend-text h4 { color: #d4af37; font-size: 16px; margin-bottom: 8px; }
.recommend-text p { color: #8a9a8a; font-size: 14px; line-height: 1.8; }