/* ============================================
   T06 导航之站 v2 - 大站模式
   主题：青色 #0891b2 + 白色
   风格：清爽、导航型、资源聚合、大站模式
   ============================================ */

:root {
    --primary: #0891b2;
    --primary-dark: #0e7490;
    --primary-light: #22d3ee;
    --accent: #06b6d4;
    --bg-body: #f0fdfa;
    --bg-card: #ffffff;
    --bg-dark: #064e3b;
    --text-main: #0f172a;
    --text-gray: #64748b;
    --text-light: #94a3b8;
    --border-color: #99f6e4;
    --shadow: 0 4px 24px rgba(8,145,178,0.12);
    --radius: 12px;
    --transition: all 0.3s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text-main);
    background: var(--bg-body);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ========== 导航栏 ========== */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(12px);
    border-bottom: 2px solid var(--primary);
    box-shadow: 0 2px 20px rgba(8,145,178,0.1);
}
.nav-container {
    max-width: 1400px; margin: 0 auto; padding: 0 32px;
    display: flex; align-items: center; justify-content: space-between;
    height: 68px;
}
.nav-logo { display: flex; align-items: center; gap: 10px; }
.nav-logo-text {
    font-size: 24px; font-weight: 800; color: var(--primary);
    letter-spacing: -0.5px;
}
.nav-logo-img {
    height: 40px;
    width: auto;
    vertical-align: middle;
}
.nav-menu { display: flex; list-style: none; gap: 2px; flex-wrap: wrap; }
.nav-menu .nav-link { padding: 6px 10px; font-size: 13px; white-space: nowrap; }
.nav-link {
    padding: 8px 16px; border-radius: 8px; font-size: 14px; font-weight: 600;
    color: var(--text-main); transition: var(--transition);
}
.nav-link:hover, .nav-link.active {
    background: var(--primary); color: #fff;
}
.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; }
.nav-toggle span { width: 24px; height: 2px; background: var(--text-main); border-radius: 2px; }

/* ========== 首页Hero ========== */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--primary-dark) 50%, var(--primary) 100%);
    color: #fff; text-align: center; position: relative; overflow: hidden;
}
.hero::before {
    content: ''; position: absolute; top: -50%; left: -50%;
    width: 200%; height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 60%);
    animation: heroGlow 8s ease-in-out infinite;
}
@keyframes heroGlow {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(5%, 5%); }
}
.hero-title {
    font-size: 48px; font-weight: 900; margin-bottom: 20px;
    position: relative; z-index: 1;
    background: linear-gradient(135deg, #fff 0%, var(--primary-light) 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-desc { font-size: 18px; opacity: 0.9; max-width: 700px; margin: 0 auto 36px; position: relative; z-index: 1; }
.hero-btn {
    display: inline-block; padding: 16px 48px; border-radius: 50px;
    background: #fff; color: var(--primary-dark); font-weight: 700; font-size: 16px;
    box-shadow: 0 8px 32px rgba(255,255,255,0.3);
    transition: var(--transition); position: relative; z-index: 1;
}
.hero-btn:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(255,255,255,0.4); color: var(--primary-dark); }

/* ========== 6大导航频道 ========== */
.channels {
    padding: 80px 0; background: #fff;
}
.section-title {
    font-size: 32px; font-weight: 800; text-align: center; margin-bottom: 12px;
    color: var(--text-main);
}
.section-desc { font-size: 16px; color: var(--text-gray); text-align: center; margin-bottom: 48px; }
.channel-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.channel-card {
    background: var(--bg-card); border-radius: var(--radius); padding: 36px 28px;
    border: 2px solid var(--border-color);
    transition: var(--transition); cursor: pointer;
    position: relative; overflow: hidden;
}
.channel-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transform: scaleX(0); transition: var(--transition);
}
.channel-card:hover::before { transform: scaleX(1); }
.channel-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: var(--primary); }
.channel-img { 
    width: 100%; 
    height: 250px; 
    object-fit: cover; 
    border-radius: 12px; 
    margin-bottom: 20px; 
    transition: var(--transition); 
}
.channel-card:hover .channel-img { transform: scale(1.05); }
.channel-title { font-size: 20px; font-weight: 700; margin-bottom: 10px; color: var(--text-main); }
.channel-desc { font-size: 14px; color: var(--text-gray); line-height: 1.6; margin-bottom: 16px; }
.channel-link { font-size: 14px; font-weight: 600; color: var(--primary); }

/* ========== 板块通用 ========== */
.section { padding: 80px 0; }
.section-tag {
    display: inline-block; padding: 6px 18px; border-radius: 50px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff; font-size: 13px; font-weight: 700; margin-bottom: 16px;
}

/* ========== 文章卡片 ========== */
.article-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.article-card {
    background: var(--bg-card); border-radius: var(--radius); overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}
.article-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.article-thumb { width: 100%; height: 220px; object-fit: cover; }
.article-body { padding: 20px; }
.article-title { font-size: 16px; font-weight: 700; margin-bottom: 8px; line-height: 1.5; }
.article-title a { color: var(--text-main); }
.article-title a:hover { color: var(--primary); }
.article-excerpt { font-size: 13px; color: var(--text-gray); line-height: 1.6; }
.article-meta { display: flex; gap: 12px; margin-top: 12px; font-size: 12px; color: var(--text-light); }

/* ========== 热门推荐 ========== */
.hot-topics { background: linear-gradient(135deg, var(--bg-dark), var(--primary-dark)); color: #fff; }
.hot-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.hot-card {
    background: rgba(255,255,255,0.1); border-radius: var(--radius); padding: 24px;
    backdrop-filter: blur(10px); border: 1px solid rgba(255,255,255,0.15);
    transition: var(--transition);
}
.hot-card:hover { background: rgba(255,255,255,0.18); transform: translateY(-4px); }
.hot-num { font-size: 32px; font-weight: 900; opacity: 0.3; margin-bottom: 8px; }
.hot-title { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.hot-title a { color: #fff; }
.hot-desc { font-size: 13px; opacity: 0.7; }

/* ========== 下载区块 ========== */
.download-section { background: #fff; }
.download-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.download-card {
    text-align: center; padding: 40px 28px; border-radius: var(--radius);
    border: 2px solid var(--border-color); background: var(--bg-card);
    transition: var(--transition);
}
.download-card:hover { border-color: var(--primary); transform: translateY(-4px); box-shadow: var(--shadow); }
.download-img { 
    width: 120px; 
    height: 120px; 
    object-fit: cover; 
    border-radius: 16px; 
    margin-bottom: 20px; 
    transition: var(--transition); 
}
.download-card:hover .download-img { transform: scale(1.1); }
.download-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.download-card p { font-size: 14px; color: var(--text-gray); margin-bottom: 20px; }
.download-btn {
    display: inline-block; padding: 12px 32px; border-radius: 50px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff; font-weight: 700; font-size: 14px;
    transition: var(--transition);
}
.download-btn:hover { transform: scale(1.05); box-shadow: 0 8px 24px rgba(8,145,178,0.3); color: #fff; }

/* ========== 页脚 ========== */
.footer {
    background: var(--bg-dark); color: rgba(255,255,255,0.8); padding: 60px 0 30px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand { font-size: 28px; font-weight: 800; color: #fff; margin-bottom: 12px; }
.footer-desc { font-size: 14px; line-height: 1.8; opacity: 0.7; }
.footer-title { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: rgba(255,255,255,0.7); font-size: 14px; }
.footer-links a:hover { color: var(--primary-light); }
.footer-bottom { text-align: center; padding-top: 30px; border-top: 1px solid rgba(255,255,255,0.1); font-size: 13px; opacity: 0.5; }

/* ========== 悬浮客服 ========== */
.service-float {
    position: fixed; bottom: 32px; right: 32px; z-index: 9999;
}
.service-trigger {
    width: 60px; height: 60px; border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff; border: none; font-size: 24px; cursor: pointer;
    box-shadow: 0 8px 32px rgba(8,145,178,0.4);
    transition: var(--transition); display: flex; align-items: center; justify-content: center;
}
.service-trigger:hover { transform: scale(1.1); }
.service-panel {
    position: absolute; bottom: 76px; right: 0; width: 320px;
    background: #fff; border-radius: var(--radius); padding: 28px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
    opacity: 0; visibility: hidden; transform: translateY(12px);
    transition: var(--transition);
}
.service-panel.active { opacity: 1; visibility: visible; transform: translateY(0); }
.service-panel h4 { font-size: 16px; font-weight: 700; margin-bottom: 12px; color: var(--text-main); }
.service-wechat {
    display: flex; align-items: center; gap: 12px;
    background: var(--bg-body); border-radius: 10px; padding: 14px; margin-bottom: 12px;
}
.service-wechat-id { font-size: 18px; font-weight: 800; color: var(--primary); }
.service-copy {
    padding: 8px 16px; border-radius: 8px; background: var(--primary); color: #fff;
    border: none; cursor: pointer; font-size: 13px; font-weight: 600; margin-left: auto;
    transition: var(--transition);
}
.service-copy:hover { background: var(--primary-dark); }
.service-hint { font-size: 12px; color: var(--text-gray); }

/* ========== 面包屑 ========== */
.breadcrumb { background: #f0fdfa; padding: 12px 0; margin-top: 68px; }
.breadcrumb .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.breadcrumb a { color: var(--primary); text-decoration: none; }
.breadcrumb .sep { margin: 0 8px; color: var(--text-gray); }
.breadcrumb .current { color: var(--text-main); }

/* ========== 文章页 ========== */
.article-header {
    padding: 120px 0 40px; text-align: center;
    background: linear-gradient(135deg, var(--bg-dark), var(--primary-dark));
    color: #fff;
}
.article-meta { display: flex; justify-content: center; gap: 20px; font-size: 14px; opacity: 0.8; margin-bottom: 16px; }
.article-title { font-size: 36px; font-weight: 900; max-width: 800px; margin: 0 auto; line-height: 1.3; }
.article-cover { width: 100%; max-width: 900px; margin: 40px auto; border-radius: var(--radius); display: block; }
.article-body { max-width: 800px; margin: 0 auto; padding: 40px 24px; }
.article-body p { margin-bottom: 20px; font-size: 16px; line-height: 1.9; }
.article-body h2 { font-size: 24px; font-weight: 800; margin: 36px 0 16px; color: var(--primary-dark); }
.article-body h3 { font-size: 20px; font-weight: 700; margin: 28px 0 12px; }
.article-body ul, .article-body ol { margin-bottom: 20px; padding-left: 24px; }
.article-body li { margin-bottom: 10px; font-size: 16px; line-height: 1.8; }

/* ========== 侧边栏 ========== */
.article-layout { display: grid; grid-template-columns: 1fr 320px; gap: 40px; max-width: 1200px; margin: 0 auto; padding: 40px 24px; }
.sidebar { }
.sidebar-widget {
    background: var(--bg-card); border-radius: var(--radius); padding: 24px;
    margin-bottom: 24px; border: 1px solid var(--border-color);
}
.sidebar-title { font-size: 16px; font-weight: 700; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 2px solid var(--primary); }
.sidebar-links { list-style: none; }
.sidebar-links li { margin-bottom: 10px; }
.sidebar-links a { color: var(--text-main); font-size: 14px; }
.sidebar-links a:hover { color: var(--primary); }

/* ========== 频道页 ========== */
.channel-hero {
    padding: 140px 0 60px; text-align: center;
    background: linear-gradient(135deg, var(--bg-dark), var(--primary-dark));
    color: #fff;
}
.channel-hero h1 { font-size: 40px; font-weight: 900; margin-bottom: 16px; }
.channel-hero p { font-size: 16px; opacity: 0.85; max-width: 600px; margin: 0 auto; }

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .footer-grid { grid-template-columns: repeat(3, 1fr); }
    .article-layout { grid-template-columns: 1fr; }
    .channel-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .nav-menu { display: none; flex-direction: column; position: absolute; top: 68px; left: 0; right: 0; background: #fff; padding: 16px; box-shadow: 0 8px 32px rgba(0,0,0,0.1); }
    .nav-menu.active { display: flex; }
    .nav-toggle { display: flex; }
    .hero-title { font-size: 32px; }
    .channel-grid { grid-template-columns: 1fr; }
    .article-grid { grid-template-columns: 1fr; }
    .download-cards { grid-template-columns: 1fr; }
    .hot-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .article-title { font-size: 28px; }
}
@media (max-width: 480px) {
    .hero-title { font-size: 26px; }
    .section-title { font-size: 24px; }
    .hot-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
}