*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --primary: #0A4D8C; --primary-light: #1565C0; --primary-dark: #063A6B;
    --accent: #FF6B35; --accent-light: #FF8C42;
    --dark: #1a1a2e; --gray-dark: #333; --gray: #666;
    --gray-light: #f5f5f5; --gray-border: #e0e0e0;
    --white: #ffffff; --text: #2c2c2c;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-hover: 0 8px 30px rgba(0,0,0,0.15);
    --transition: all 0.3s ease; --radius: 8px;
}
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; color: var(--text); background: var(--white); line-height: 1.6; overflow-x: hidden; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }

/* ========== Top Bar ========== */
.top-bar { background: var(--dark); color: rgba(255,255,255,0.85); font-size: 13px; padding: 8px 0; }
.top-bar .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; }
.top-bar-left { display: flex; gap: 20px; align-items: center; }
.top-bar-right { display: flex; gap: 12px; }
.top-bar-right a { font-size: 16px; transition: var(--transition); }
.top-bar-right a:hover { color: var(--accent); }

/* ========== Header ========== */
.header { background: white; position: sticky; top: 0; z-index: 999; box-shadow: 0 2px 10px rgba(0,0,0,0.06); transition: var(--transition); }
.nav { display: flex; justify-content: space-between; align-items: center; height: 70px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon { width: 44px; height: 44px; background: linear-gradient(135deg, var(--primary), var(--primary-light)); border-radius: 8px; display: flex; align-items: center; justify-content: center; color: white; font-size: 24px; font-weight: 800; }
.logo-text { display: flex; flex-direction: column; }
.logo-text span:first-child { font-size: 18px; font-weight: 700; color: var(--dark); }
.logo-text .en { font-size: 10px; color: var(--gray); letter-spacing: 0.5px; }
.nav-menu { display: flex; gap: 8px; align-items: center; }
.nav-menu > li { position: relative; }
.nav-menu > li > a { display: block; padding: 8px 16px; font-size: 15px; font-weight: 500; color: var(--gray-dark); transition: var(--transition); border-radius: 6px; }
.nav-menu > li > a:hover, .nav-menu > li > a.active { color: var(--primary); background: rgba(10,77,140,0.06); }
.dropdown { position: absolute; top: 100%; left: 0; background: white; min-width: 200px; box-shadow: 0 10px 30px rgba(0,0,0,0.12); border-radius: var(--radius); padding: 8px 0; margin: 0; list-style: none; opacity: 0; visibility: hidden; transform: translateY(10px); transition: var(--transition); z-index: 100; }
.nav-menu > li:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown li a { display: block; padding: 8px 20px; font-size: 14px; color: var(--gray-dark); transition: var(--transition); }
.dropdown li a:hover { background: var(--gray-light); color: var(--primary); padding-left: 26px; }
.dropdown-title { padding: 8px 20px 4px; font-size: 12px; font-weight: 700; color: var(--accent); text-transform: uppercase; letter-spacing: 1px; }
.mobile-toggle { display: none; background: none; border: none; font-size: 24px; cursor: pointer; color: var(--dark); }

/* ========== Page Banner ========== */
.page-banner { height: 240px; background: linear-gradient(135deg, #0a2a4a 0%, #0A4D8C 50%, #1565C0 100%); display: flex; align-items: center; justify-content: center; text-align: center; color: white; position: relative; overflow: hidden; }
.page-banner::before { content: ''; position: absolute; top: -50%; right: -10%; width: 500px; height: 500px; background: radial-gradient(circle, rgba(255,107,53,0.15), transparent 70%); border-radius: 50%; }
.page-banner::after { content: ''; position: absolute; bottom: -30%; left: -10%; width: 400px; height: 400px; background: radial-gradient(circle, rgba(21,101,192,0.2), transparent 70%); border-radius: 50%; }
.page-banner-content { position: relative; z-index: 1; }
.page-banner h1 { font-size: 38px; font-weight: 800; margin-bottom: 10px; letter-spacing: 2px; }
.page-banner p { font-size: 16px; opacity: 0.85; }
.breadcrumb-bar { background: var(--gray-light); border-bottom: 1px solid var(--gray-border); padding: 12px 0; }
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--gray); flex-wrap: wrap; }
.breadcrumb a { color: var(--gray); transition: var(--transition); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb-separator { color: var(--gray-border); }
.breadcrumb .current { color: var(--primary); font-weight: 600; }

/* ========== Article Layout ========== */
.article-page { padding: 50px 0; background: var(--gray-light); }
.article-layout { display: grid; grid-template-columns: 1fr 300px; gap: 30px; }

/* Article Main */
.article-main { background: white; border-radius: var(--radius); padding: 40px; box-shadow: var(--shadow); }
.article-header { border-bottom: 2px solid var(--gray-light); padding-bottom: 24px; margin-bottom: 30px; }
.article-cat-tag { display: inline-block; padding: 4px 14px; background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: white; font-size: 13px; border-radius: 4px; font-weight: 600; margin-bottom: 16px; }
.article-title { font-size: 28px; font-weight: 800; color: var(--dark); line-height: 1.4; margin-bottom: 16px; }
.article-meta { display: flex; align-items: center; gap: 20px; font-size: 14px; color: var(--gray); flex-wrap: wrap; }
.article-meta span { display: flex; align-items: center; gap: 6px; }
.article-meta .source { color: var(--primary); font-weight: 600; }

.article-body { font-size: 16px; line-height: 2; color: var(--gray-dark); }
.article-body h2 { font-size: 22px; font-weight: 700; color: var(--dark); margin: 30px 0 16px; padding-left: 14px; border-left: 4px solid var(--accent); }
.article-body h3 { font-size: 18px; font-weight: 700; color: var(--dark); margin: 24px 0 12px; }
.article-body p { margin-bottom: 18px; }
.article-body strong { color: var(--primary); font-weight: 700; }
.article-body ul, .article-body ol { margin: 16px 0 16px 24px; }
.article-body li { margin-bottom: 8px; list-style: disc; }
.article-body ol li { list-style: decimal; }
.article-body blockquote { background: linear-gradient(135deg, rgba(10,77,140,0.05), rgba(255,107,53,0.05)); border-left: 4px solid var(--primary); padding: 16px 24px; border-radius: 0 8px 8px 0; margin: 20px 0; font-style: italic; color: var(--gray-dark); }
.article-body .highlight-box { background: linear-gradient(135deg, #fff8f3, #fff5e6); border: 1px solid #ffe0c0; border-radius: 8px; padding: 20px 24px; margin: 20px 0; }
.article-body .highlight-box h4 { color: var(--accent); font-size: 16px; margin-bottom: 8px; }
.article-body .img-placeholder { width: 100%; height: 200px; border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 48px; margin: 24px 0; background: linear-gradient(135deg, #0A4D8C, #1565C0); color: rgba(255,255,255,0.8); }

/* Article Footer */
.article-footer { border-top: 2px solid var(--gray-light); margin-top: 36px; padding-top: 24px; }
.article-tags { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 24px; }
.article-tags .tag-label { font-size: 14px; font-weight: 700; color: var(--gray-dark); }
.article-tags .tag { padding: 4px 12px; background: var(--gray-light); border-radius: 4px; font-size: 13px; color: var(--gray); transition: var(--transition); cursor: pointer; }
.article-tags .tag:hover { background: var(--primary); color: white; }
.article-share { display: flex; align-items: center; gap: 12px; padding: 16px 0; border-top: 1px solid var(--gray-border); }
.article-share .share-label { font-size: 14px; font-weight: 600; color: var(--gray-dark); }
.article-share a { width: 36px; height: 36px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 16px; transition: var(--transition); }
.share-whatsapp { background: #25D366; color: white; }
.share-wechat { background: #07C160; color: white; }
.share-email { background: var(--primary); color: white; }
.share-link { background: var(--gray-light); color: var(--gray-dark); }
.article-share a:hover { transform: translateY(-3px); }

/* Prev/Next Nav */
.article-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 24px; }
.article-nav-item { background: var(--gray-light); border-radius: 8px; padding: 16px 20px; transition: var(--transition); cursor: pointer; border: 1px solid var(--gray-border); }
.article-nav-item:hover { background: white; border-color: var(--primary); box-shadow: var(--shadow); }
.article-nav-item.next { text-align: right; }
.article-nav-label { font-size: 12px; color: var(--gray); margin-bottom: 4px; }
.article-nav-title { font-size: 14px; font-weight: 600; color: var(--gray-dark); transition: var(--transition); }
.article-nav-item:hover .article-nav-title { color: var(--primary); }

/* Sidebar */
.article-sidebar { display: flex; flex-direction: column; gap: 24px; }
.sidebar-block { background: white; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.sidebar-title { background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: white; padding: 14px 20px; font-size: 16px; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.sidebar-title::before { content: ''; width: 4px; height: 18px; background: var(--accent); border-radius: 2px; }
.hot-news { padding: 8px 0; }
.hot-news-item { display: flex; gap: 12px; padding: 12px 20px; border-bottom: 1px solid var(--gray-border); transition: var(--transition); cursor: pointer; }
.hot-news-item:last-child { border-bottom: none; }
.hot-news-item:hover { background: var(--gray-light); }
.hot-news-num { width: 24px; height: 24px; border-radius: 4px; display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 700; flex-shrink: 0; }
.hot-news-item:nth-child(1) .hot-news-num { background: var(--accent); color: white; }
.hot-news-item:nth-child(2) .hot-news-num { background: #FF9F43; color: white; }
.hot-news-item:nth-child(3) .hot-news-num { background: #54A0FF; color: white; }
.hot-news-item:nth-child(n+4) .hot-news-num { background: var(--gray-light); color: var(--gray); }
.hot-news-title { font-size: 13px; color: var(--gray-dark); line-height: 1.5; transition: var(--transition); }
.hot-news-item:hover .hot-news-title { color: var(--primary); }
.hot-news-date { font-size: 12px; color: var(--gray); margin-top: 4px; }
.tag-cloud { padding: 20px; display: flex; flex-wrap: wrap; gap: 8px; }
.tag-cloud .tag { padding: 6px 14px; background: var(--gray-light); border-radius: 20px; font-size: 13px; color: var(--gray-dark); transition: var(--transition); cursor: pointer; }
.tag-cloud .tag:hover { background: var(--primary); color: white; }
.sidebar-contact { background: linear-gradient(135deg, var(--primary), var(--primary-light)); border-radius: var(--radius); padding: 24px; text-align: center; color: white; }
.sidebar-contact h4 { font-size: 18px; margin-bottom: 8px; }
.sidebar-contact p { font-size: 13px; opacity: 0.85; margin-bottom: 16px; }
.sidebar-contact-phone { font-size: 22px; font-weight: 800; margin-bottom: 12px; }
.sidebar-contact .btn { display: inline-block; padding: 10px 28px; background: var(--accent); color: white; border-radius: 6px; font-size: 14px; font-weight: 600; transition: var(--transition); }
.sidebar-contact .btn:hover { background: var(--accent-light); transform: translateY(-2px); }

/* ========== Footer ========== */
.footer { background: var(--dark); color: rgba(255,255,255,0.7); padding: 50px 0 0; }
.footer-grid { display: grid;  grid-template-columns: 3fr  1fr 1.5fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand .logo-text span:first-child { color: white; }
.footer-brand p { font-size: 13px; line-height: 1.8; margin-bottom: 16px; }
.footer-social { display: flex; gap: 10px; }
.footer-social a { width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,0.1); display: flex; align-items: center; justify-content: center; font-size: 16px; transition: var(--transition); }
.footer-social a:hover { background: var(--accent); transform: translateY(-3px); }
.footer-col h4 { color: white; font-size: 16px; margin-bottom: 16px; font-weight: 600; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { font-size: 13px; transition: var(--transition); }
.footer-col ul li a:hover { color: var(--accent); padding-left: 4px; }
.footer-contact li { display: flex; gap: 8px; align-items: flex-start; margin-bottom: 12px; font-size: 13px; }
.footer-contact .icon { flex-shrink: 0; }
.footer-bottom { padding: 20px 0; text-align: center; font-size: 13px; }

/* ========== Floating ========== */
.back-top { position: fixed; bottom: 30px; right: 30px; width: 48px; height: 48px; border-radius: 50%; background: var(--primary); color: white; border: none; font-size: 20px; cursor: pointer; opacity: 0; visibility: hidden; transition: var(--transition); z-index: 998; box-shadow: 0 4px 15px rgba(0,0,0,0.2); }
.back-top.show { opacity: 1; visibility: visible; }
.back-top:hover { background: var(--accent); transform: translateY(-3px); }
.float-contact { position: fixed; right: 30px; bottom: 90px; display: flex; flex-direction: column; gap: 10px; z-index: 998; }
.float-btn { width: 48px; height: 48px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 20px; color: white; cursor: pointer; transition: var(--transition); position: relative; box-shadow: 0 4px 15px rgba(0,0,0,0.15); }
.float-btn.whatsapp { background: #25D366; }
.float-btn.phone { background: var(--accent); }
.float-btn.email { background: var(--primary); }
.float-btn:hover { transform: scale(1.1); }
.float-btn .tooltip { position: absolute; right: 60px; top: 50%; transform: translateY(-50%); background: var(--dark); color: white; padding: 6px 12px; border-radius: 4px; font-size: 12px; white-space: nowrap; opacity: 0; visibility: hidden; transition: var(--transition); }
.float-btn:hover .tooltip { opacity: 1; visibility: visible; right: 58px; }

/* ========== Responsive ========== */
@media (max-width: 1024px) {
    .article-layout { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .top-bar-left { flex-direction: column; gap: 4px; font-size: 12px; }
    .nav-menu { display: none; position: absolute; top: 100%; left: 0; right: 0; background: white; flex-direction: column; padding: 20px; box-shadow: 0 10px 30px rgba(0,0,0,0.1); }
    .nav-menu.show { display: flex; }
    .mobile-toggle { display: block; }
    .page-banner h1 { font-size: 26px; }
    .article-main { padding: 24px; }
    .article-title { font-size: 22px; }
    .article-nav { grid-template-columns: 1fr; }
    .article-nav-item.next { text-align: left; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .float-contact { display: none; }
}