/* ============================================================
   vptech110 主题 — 视频侦查实验室网
   蓝色Bootstrap风格 · 响应式
   ============================================================ */

:root {
    --primary: #3498db;
    --primary-dark: #2980b9;
    --primary-light: #5dade2;
    --accent: #e74c3c;
    --bg: #f8f9fa;
    --white: #fff;
    --text: #333;
    --text-light: #666;
    --text-lighter: #999;
    --border: #e0e0e0;
    --shadow: 0 2px 10px rgba(0,0,0,.08);
    --radius: 6px;
    --header-h: 64px;
    --font: 'Microsoft YaHei','PingFang SC',Arial,sans-serif;
    --max-w: 1200px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font:15px/1.7 var(--font);color:var(--text);background:var(--bg)}
a{color:var(--primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--primary-dark)}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
input,button,textarea,select{font:inherit;outline:none}
button{cursor:pointer;border:none;background:none}
.container{max-width:var(--max-w);margin:0 auto;padding:0 20px}

/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:100;background:var(--primary);box-shadow:0 2px 8px rgba(0,0,0,.15);height:var(--header-h)}
.header-inner{max-width:var(--max-w);margin:0 auto;padding:0 20px;display:flex;align-items:center;height:100%}
.logo{flex-shrink:0;margin-right:30px}
.logo a{color:#fff;font-size:19px;font-weight:700;letter-spacing:1px;white-space:nowrap}
.logo a:hover{color:#fff}
.main-nav{flex:1}
.nav-list{display:flex;gap:0}
.nav-list li a{display:block;padding:0 15px;line-height:var(--header-h);color:rgba(255,255,255,.9);font-size:14px;font-weight:500;transition:all .2s}
.nav-list li a:hover,.nav-list li.active a{background:rgba(255,255,255,.12);color:#fff}
.search-toggle{color:rgba(255,255,255,.9);font-size:18px;padding:8px;border-radius:50%;margin-left:8px}
.search-toggle:hover{color:#fff;background:rgba(255,255,255,.1)}
.mobile-menu-btn{display:none;flex-direction:column;gap:5px;padding:8px;margin-left:auto}
.mobile-menu-btn span{display:block;width:22px;height:2px;background:#fff;border-radius:2px}

/* ===== Search Overlay ===== */
.search-overlay{position:fixed;inset:0;background:rgba(0,0,0,.85);z-index:200;display:none;justify-content:center;align-items:center}
.search-overlay.active{display:flex}
.search-inner{width:90%;max-width:560px}
.search-form{display:flex;gap:10px}
.search-input{flex:1;padding:14px 18px;font-size:16px;background:#fff;border-radius:var(--radius)}
.search-submit{padding:14px 28px;font-size:15px;background:var(--accent);color:#fff;border-radius:var(--radius);font-weight:600}
.search-close{position:absolute;top:-45px;right:0;font-size:26px;color:#fff;padding:6px}

/* ===== Slider ===== */
.hero-slider{position:relative;margin-bottom:30px;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);background:#ddd}
.slider-track{display:flex;transition:transform .5s ease}
.slider-slide{flex:0 0 100%}
.slider-slide img{width:100%;height:380px;object-fit:cover}
.slide-caption{position:absolute;bottom:0;left:0;right:0;padding:14px 20px;background:linear-gradient(transparent,rgba(0,0,0,.7));color:#fff;font-size:17px;font-weight:600}
.slider-prev,.slider-next{position:absolute;top:50%;transform:translateY(-50%);width:40px;height:40px;background:rgba(255,255,255,.85);border-radius:50%;font-size:18px;color:var(--primary);box-shadow:0 1px 4px rgba(0,0,0,.1);opacity:0;transition:opacity .3s}
.hero-slider:hover .slider-prev,.hero-slider:hover .slider-next{opacity:1}
.slider-prev{left:14px}.slider-next{right:14px}
.slider-dots{position:absolute;bottom:14px;left:50%;transform:translateX(-50%);display:flex;gap:8px}
.slider-dot{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.5);cursor:pointer}
.slider-dot.active{background:var(--accent)}

/* ===== Sections ===== */
.section{margin-bottom:30px}
.section-header{display:flex;align-items:center;justify-content:space-between;padding-bottom:12px;border-bottom:3px solid var(--primary);margin-bottom:18px}
.section-title{font-size:20px;font-weight:700;color:var(--primary-dark)}

/* ===== Top News ===== */
.top-news-list{display:flex;flex-direction:column;gap:12px}
.top-news-item{padding:16px 20px;background:var(--white);border-left:4px solid var(--primary);border-radius:0 var(--radius) var(--radius) 0;box-shadow:var(--shadow);transition:all .2s}
.top-news-item:hover{box-shadow:0 4px 16px rgba(0,0,0,.12);transform:translateX(3px)}
.top-news-title{font-size:16px;font-weight:600;margin-bottom:4px}
.top-news-title a{color:var(--text)}
.top-news-title a:hover{color:var(--primary)}
.top-news-excerpt{font-size:13px;color:var(--text-light);line-height:1.6}

/* ===== Main + Sidebar ===== */
.main-with-sidebar{display:grid;grid-template-columns:1fr 300px;gap:28px}
.content-area{min-width:0}

/* ===== Post List ===== */
.post-list{display:flex;flex-direction:column;gap:18px}
.post-item{display:flex;gap:18px;background:var(--white);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);transition:box-shadow .2s}
.post-item:hover{box-shadow:0 4px 16px rgba(0,0,0,.12)}
.post-thumb{flex-shrink:0;width:200px;height:135px;overflow:hidden;border-radius:4px}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.post-item:hover .post-thumb img{transform:scale(1.06)}
.post-body{flex:1;min-width:0;display:flex;flex-direction:column}
.post-title{font-size:17px;font-weight:600;margin-bottom:6px}
.post-title a{color:var(--text)}.post-title a:hover{color:var(--primary)}
.post-meta{display:flex;gap:14px;font-size:12px;color:var(--text-lighter);margin-bottom:8px}
.post-excerpt{font-size:13px;color:var(--text-light);line-height:1.7;flex:1}

/* ===== Sidebar ===== */
.sidebar{position:sticky;top:calc(var(--header-h) + 20px)}
.sidebar-widget{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:16px;overflow:hidden}
.widget-header{padding:14px 18px;border-bottom:1px solid var(--border)}
.widget-title{font-size:16px;font-weight:700;color:var(--primary-dark);padding-left:12px;border-left:3px solid var(--primary)}
.hot-list{padding:6px 0}
.hot-list li{display:flex;align-items:flex-start;padding:9px 18px;gap:10px;transition:background .2s}
.hot-list li:hover{background:var(--bg)}
.hot-rank{flex-shrink:0;width:22px;height:22px;line-height:22px;text-align:center;font-size:12px;font-weight:700;color:#fff;border-radius:4px;background:var(--text-lighter)}
.hot-rank.r1{background:#e74c3c}.hot-rank.r2{background:#e67e22}.hot-rank.r3{background:#f1c40f;color:#333}
.hot-list li a{font-size:13px;line-height:1.5;color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.hot-list li a:hover{color:var(--primary)}

/* ===== Single Post ===== */
.single-post{background:var(--white);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.post-title-single{font-size:24px;font-weight:700;color:var(--text);line-height:1.4;margin-bottom:14px}
.post-meta-single{display:flex;flex-wrap:wrap;gap:18px;font-size:13px;color:var(--text-lighter);padding-bottom:18px;margin-bottom:22px;border-bottom:1px solid var(--border)}
.post-content{font-size:15px;line-height:1.9;word-break:break-all}
.post-content p{margin-bottom:16px}
.post-content img{max-width:100%;height:auto;margin:14px auto;border-radius:4px}
.post-content h2,.post-content h3{color:var(--primary-dark);margin:24px 0 12px}
.breadcrumb{padding:10px 0;font-size:13px;color:var(--text-lighter)}.breadcrumb a{color:var(--text-light)}.breadcrumb a:hover{color:var(--primary)}.breadcrumb .separator{margin:0 6px}

/* ===== Pagination ===== */
.pagination{margin-top:24px}
.page-nav{display:flex;justify-content:center;gap:6px;flex-wrap:wrap}
.page-nav li{list-style:none}
.page-nav a,.page-nav span{display:inline-block;min-width:36px;height:36px;line-height:36px;text-align:center;background:var(--white);border-radius:4px;font-size:13px;color:var(--text-light);box-shadow:0 1px 3px rgba(0,0,0,.06);transition:all .2s}
.page-nav a:hover{background:var(--primary-light);color:#fff}
.page-current a{background:var(--primary);color:#fff;font-weight:600}

/* ===== Footer ===== */
.friend-links{background:var(--white);padding:20px 0;margin-top:36px;border-top:3px solid var(--primary)}
.friend-links-header{font-size:15px;font-weight:700;color:var(--primary-dark);margin-bottom:10px}
.friend-links-list{display:flex;flex-wrap:wrap;gap:14px}
.friend-links-list a{font-size:13px;color:var(--text-light)}.friend-links-list a:hover{color:var(--primary)}
.site-footer{background:#2c3e50;color:rgba(255,255,255,.7);padding:22px 0;text-align:center;font-size:12px;line-height:2}
.site-footer a{color:rgba(255,255,255,.8)}.site-footer a:hover{color:#fff}
.beian-icon{display:inline-block;height:15px;vertical-align:-3px;margin-right:4px}
.back-to-top{position:fixed;bottom:28px;right:28px;width:42px;height:42px;background:var(--primary);color:#fff;border-radius:50%;font-size:20px;box-shadow:0 2px 8px rgba(0,0,0,.2);opacity:0;visibility:hidden;transition:all .3s;z-index:90}
.back-to-top.visible{opacity:1;visibility:visible}.back-to-top:hover{background:var(--accent);transform:translateY(-3px)}
.empty-state{text-align:center;padding:60px 20px;color:var(--text-lighter)}

/* ===== Responsive ===== */
@media (max-width:960px){
    .main-with-sidebar{grid-template-columns:1fr}.sidebar{position:static}
    .post-item{flex-direction:column}.post-thumb{width:100%;height:180px}
    .slider-slide img{height:260px}
    .post-title-single{font-size:21px}
}
@media (max-width:640px){
    :root{--header-h:54px}
    .container{padding:0 12px}
    .mobile-menu-btn{display:flex}
    .main-nav{position:fixed;top:var(--header-h);left:0;width:100%;background:var(--primary-dark);max-height:0;overflow:hidden;transition:max-height .3s}
    .main-nav.open{max-height:400px}
    .nav-list{flex-direction:column}
    .nav-list li a{padding:12px 18px;line-height:1.5;border-bottom:1px solid rgba(255,255,255,.08)}
    .slider-slide img{height:180px}
    .slide-caption{font-size:14px;padding:8px 12px}
    .post-title{font-size:15px}
    .single-post{padding:16px}
    .post-title-single{font-size:19px}
}