/* =============================================
   糖心传媒 - 主样式文件
   域名: yzczx.cn
   版本: 1.0.0
   ============================================= */

/* ---- CSS变量 ---- */
:root {
  --primary: #c0181e;
  --primary-dark: #8b0000;
  --primary-light: #e63946;
  --secondary: #1a1a2e;
  --secondary-light: #16213e;
  --accent: #f4a261;
  --accent-gold: #d4af37;
  --text-main: #1c1c1c;
  --text-muted: #666;
  --text-light: #999;
  --bg-white: #fff;
  --bg-light: #f8f8f8;
  --bg-dark: #111;
  --border: #e5e5e5;
  --shadow: 0 4px 20px rgba(0,0,0,.1);
  --shadow-hover: 0 8px 32px rgba(192,24,30,.18);
  --radius: 10px;
  --radius-lg: 18px;
  --transition: all .28s cubic-bezier(.4,0,.2,1);
  --font-main: 'PingFang SC','Microsoft YaHei','Hiragino Sans GB',sans-serif;
}

/* ---- Reset ---- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font-main);color:var(--text-main);background:var(--bg-white);line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:var(--transition)}
ul,ol{list-style:none}
button{cursor:pointer;border:none;background:none;font-family:inherit}
input,textarea,select{font-family:inherit;outline:none}

/* ---- 通用工具类 ---- */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:72px 0}
.section-sm{padding:48px 0}
.text-center{text-align:center}
.text-red{color:var(--primary)}
.bg-dark{background:var(--secondary)}
.bg-light{background:var(--bg-light)}
.hidden{display:none!important}
.flex{display:flex}
.flex-center{display:flex;align-items:center;justify-content:center}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}

/* ---- 标题样式 ---- */
.section-title{font-size:2rem;font-weight:700;color:var(--text-main);margin-bottom:12px;line-height:1.3}
.section-title span{color:var(--primary)}
.section-subtitle{font-size:1rem;color:var(--text-muted);margin-bottom:40px}
.section-header{text-align:center;margin-bottom:48px}
.section-header::after{content:'';display:block;width:60px;height:3px;background:linear-gradient(90deg,var(--primary),var(--accent-gold));margin:16px auto 0;border-radius:2px}

/* ---- 按钮 ---- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:6px;font-size:.95rem;font-weight:600;transition:var(--transition);letter-spacing:.5px}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 6px 20px rgba(192,24,30,.35)}
.btn-outline{border:2px solid var(--primary);color:var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff}
.btn-gold{background:linear-gradient(135deg,var(--accent-gold),#c9a227);color:#fff}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(212,175,55,.4)}
.btn-sm{padding:8px 18px;font-size:.85rem}
.btn-lg{padding:16px 36px;font-size:1.05rem}

/* ---- 顶部公告栏 ---- */
.top-bar{background:var(--secondary);color:#ccc;font-size:.82rem;padding:6px 0;border-bottom:1px solid #2a2a3e}
.top-bar .container{display:flex;justify-content:space-between;align-items:center;gap:12px}
.top-bar a{color:#aaa;transition:var(--transition)}
.top-bar a:hover{color:var(--primary-light)}
.top-bar-left,.top-bar-right{display:flex;align-items:center;gap:16px}

/* ---- 导航栏 ---- */
.navbar{background:#fff;border-bottom:2px solid var(--border);position:sticky;top:0;z-index:1000;box-shadow:0 2px 12px rgba(0,0,0,.07)}
.navbar-inner{display:flex;align-items:center;justify-content:space-between;height:70px;gap:20px}
.navbar-brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.navbar-logo{width:44px;height:44px;object-fit:contain}
.navbar-brand-text{font-size:1.5rem;font-weight:800;color:var(--primary);letter-spacing:1px}
.navbar-brand-sub{font-size:.72rem;color:var(--text-muted);display:block;line-height:1}

.nav-menu{display:flex;align-items:center;gap:4px}
.nav-item{position:relative}
.nav-link{padding:8px 14px;border-radius:6px;font-size:.92rem;font-weight:500;color:var(--text-main);transition:var(--transition);white-space:nowrap}
.nav-link:hover,.nav-link.active{color:var(--primary);background:rgba(192,24,30,.06)}
.nav-link.active{font-weight:700}

/* 下拉菜单 */
.dropdown{position:absolute;top:calc(100% + 8px);left:0;min-width:160px;background:#fff;border-radius:var(--radius);box-shadow:0 8px 32px rgba(0,0,0,.12);border:1px solid var(--border);opacity:0;visibility:hidden;transform:translateY(-8px);transition:var(--transition);z-index:200}
.nav-item:hover .dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown a{display:block;padding:10px 18px;font-size:.88rem;color:var(--text-main);transition:var(--transition)}
.dropdown a:hover{color:var(--primary);background:rgba(192,24,30,.05)}

/* 搜索框 */
.search-bar{background:var(--bg-light);border-bottom:1px solid var(--border);padding:10px 0}
.search-form{display:flex;align-items:center;max-width:600px;margin:0 auto;background:#fff;border:2px solid var(--border);border-radius:30px;overflow:hidden;transition:var(--transition)}
.search-form:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(192,24,30,.1)}
.search-input{flex:1;padding:10px 20px;font-size:.95rem;border:none;background:transparent;color:var(--text-main)}
.search-input::placeholder{color:var(--text-light)}
.search-btn{padding:10px 22px;background:var(--primary);color:#fff;font-size:.9rem;font-weight:600;border-radius:0 28px 28px 0;transition:var(--transition)}
.search-btn:hover{background:var(--primary-dark)}

/* 移动端菜单按钮 */
.nav-toggle{display:none;flex-direction:column;gap:5px;padding:8px;cursor:pointer}
.nav-toggle span{width:24px;height:2px;background:var(--text-main);border-radius:2px;transition:var(--transition)}

/* ---- Hero 横幅 ---- */
.hero{position:relative;min-height:520px;background:var(--secondary);overflow:hidden;display:flex;align-items:center}
.hero-bg{position:absolute;inset:0;object-fit:cover;width:100%;height:100%;opacity:.38}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(26,26,46,.9) 0%,rgba(139,0,0,.6) 100%)}
.hero-content{position:relative;z-index:2;max-width:680px}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(192,24,30,.25);border:1px solid rgba(192,24,30,.5);color:#f9c;padding:6px 14px;border-radius:20px;font-size:.82rem;margin-bottom:20px}
.hero-title{font-size:3rem;font-weight:900;color:#fff;line-height:1.2;margin-bottom:16px}
.hero-title em{color:var(--accent-gold);font-style:normal}
.hero-desc{font-size:1.05rem;color:rgba(255,255,255,.82);margin-bottom:32px;line-height:1.8}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:32px;margin-top:40px;flex-wrap:wrap}
.hero-stat{text-align:center}
.hero-stat-num{font-size:1.8rem;font-weight:800;color:var(--accent-gold)}
.hero-stat-label{font-size:.8rem;color:rgba(255,255,255,.65);margin-top:2px}

/* ---- 视频卡片 ---- */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.video-card{background:#fff;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);transition:var(--transition);cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.video-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#111}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.video-card:hover .video-thumb img{transform:scale(1.06)}
.play-btn{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;transition:var(--transition);background:rgba(0,0,0,.35)}
.video-card:hover .play-btn{opacity:1}
.play-icon{width:56px;height:56px;background:rgba(192,24,30,.92);border-radius:50%;display:flex;align-items:center;justify-content:center;transform:scale(.85);transition:var(--transition)}
.video-card:hover .play-icon{transform:scale(1)}
.play-icon svg{width:22px;height:22px;fill:#fff;margin-left:4px}
.video-duration{position:absolute;bottom:10px;right:10px;background:rgba(0,0,0,.75);color:#fff;font-size:.75rem;padding:3px 8px;border-radius:4px}
.video-tag{position:absolute;top:10px;left:10px;background:var(--primary);color:#fff;font-size:.72rem;padding:3px 10px;border-radius:4px;font-weight:600}
.video-info{padding:16px}
.video-title{font-size:.95rem;font-weight:700;color:var(--text-main);margin-bottom:8px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;align-items:center;gap:12px;font-size:.8rem;color:var(--text-muted)}
.video-meta span{display:flex;align-items:center;gap:4px}
.video-meta svg{width:14px;height:14px;fill:currentColor}
.video-author{display:flex;align-items:center;gap:8px;margin-top:10px}
.video-avatar{width:28px;height:28px;border-radius:50%;object-fit:cover;background:var(--bg-light)}
.video-author-name{font-size:.82rem;color:var(--text-muted)}

/* ---- 图片卡片 ---- */
.photo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}
.photo-card{position:relative;border-radius:var(--radius);overflow:hidden;aspect-ratio:3/4;cursor:pointer}
.photo-card img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.photo-card:hover img{transform:scale(1.08)}
.photo-overlay{position:absolute;inset:0;background:linear-gradient(to top,rgba(0,0,0,.7) 0%,transparent 50%);opacity:0;transition:var(--transition)}
.photo-card:hover .photo-overlay{opacity:1}
.photo-caption{position:absolute;bottom:0;left:0;right:0;padding:16px;color:#fff;transform:translateY(10px);opacity:0;transition:var(--transition)}
.photo-card:hover .photo-caption{transform:translateY(0);opacity:1}
.photo-caption h4{font-size:.9rem;font-weight:700;margin-bottom:4px}
.photo-caption p{font-size:.78rem;opacity:.8}

/* ---- 专家卡片 ---- */
.expert-card{background:#fff;border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow);transition:var(--transition);text-align:center;border:1px solid var(--border)}
.expert-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover);border-color:rgba(192,24,30,.2)}
.expert-avatar{width:90px;height:90px;border-radius:50%;object-fit:cover;margin:0 auto 16px;border:3px solid var(--primary)}
.expert-name{font-size:1.1rem;font-weight:700;margin-bottom:4px}
.expert-title{font-size:.85rem;color:var(--primary);font-weight:600;margin-bottom:10px}
.expert-desc{font-size:.85rem;color:var(--text-muted);line-height:1.6;margin-bottom:16px}
.expert-tags{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin-bottom:16px}
.expert-tag{background:rgba(192,24,30,.08);color:var(--primary);font-size:.75rem;padding:3px 10px;border-radius:20px}
.expert-actions{display:flex;gap:8px;justify-content:center}

/* ---- 评论卡片 ---- */
.review-card{background:#fff;border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow);border-left:4px solid var(--primary)}
.review-stars{color:var(--accent-gold);font-size:1rem;margin-bottom:10px}
.review-text{font-size:.92rem;color:var(--text-main);line-height:1.7;margin-bottom:16px}
.review-author{display:flex;align-items:center;gap:12px}
.review-avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent-gold));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1rem;flex-shrink:0}
.review-name{font-weight:700;font-size:.92rem}
.review-date{font-size:.78rem;color:var(--text-muted)}

/* ---- FAQ ---- */
.faq-item{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;margin-bottom:12px}
.faq-question{padding:18px 20px;font-weight:600;font-size:.95rem;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:var(--transition)}
.faq-question:hover{background:rgba(192,24,30,.04)}
.faq-question.active{background:rgba(192,24,30,.06);color:var(--primary)}
.faq-icon{width:20px;height:20px;border-radius:50%;border:2px solid currentColor;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:var(--transition);font-size:.9rem}
.faq-question.active .faq-icon{transform:rotate(45deg);border-color:var(--primary)}
.faq-answer{padding:0 20px;max-height:0;overflow:hidden;transition:max-height .35s ease,padding .35s ease;font-size:.9rem;color:var(--text-muted);line-height:1.7}
.faq-answer.open{padding:0 20px 18px;max-height:400px}

/* ---- 合作品牌 ---- */
.partner-logos{display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:center}
.partner-logo{padding:16px 28px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);font-size:.95rem;font-weight:700;color:var(--text-muted);transition:var(--transition)}
.partner-logo:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-3px);box-shadow:var(--shadow)}

/* ---- 统计数字 ---- */
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat-card{text-align:center;padding:32px 20px;background:#fff;border-radius:var(--radius-lg);box-shadow:var(--shadow)}
.stat-num{font-size:2.4rem;font-weight:900;color:var(--primary);line-height:1}
.stat-unit{font-size:1.2rem;font-weight:700;color:var(--accent-gold)}
.stat-label{font-size:.88rem;color:var(--text-muted);margin-top:8px}

/* ---- 联系模块 ---- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.contact-info h3{font-size:1.3rem;font-weight:700;margin-bottom:20px}
.contact-item{display:flex;gap:14px;margin-bottom:20px}
.contact-icon{width:44px;height:44px;background:rgba(192,24,30,.1);border-radius:10px;display:flex;align-items:center;justify-content:center;flex-shrink:0;color:var(--primary);font-size:1.2rem}
.contact-label{font-size:.82rem;color:var(--text-muted)}
.contact-value{font-size:.95rem;font-weight:600;color:var(--text-main)}
.qr-grid{display:flex;gap:24px;flex-wrap:wrap}
.qr-item{text-align:center}
.qr-item img{width:120px;height:120px;border-radius:10px;border:2px solid var(--border)}
.qr-item p{font-size:.8rem;color:var(--text-muted);margin-top:8px}

/* ---- 社区功能 ---- */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{padding:28px 24px;background:#fff;border-radius:var(--radius-lg);box-shadow:var(--shadow);transition:var(--transition);border-top:3px solid transparent}
.feature-card:hover{transform:translateY(-5px);border-top-color:var(--primary)}
.feature-icon{font-size:2.2rem;margin-bottom:16px}
.feature-title{font-size:1.05rem;font-weight:700;margin-bottom:10px}
.feature-desc{font-size:.88rem;color:var(--text-muted);line-height:1.7}

/* ---- 面包屑 ---- */
.breadcrumb{background:var(--bg-light);padding:12px 0;border-bottom:1px solid var(--border)}
.breadcrumb-list{display:flex;align-items:center;gap:8px;font-size:.85rem;color:var(--text-muted)}
.breadcrumb-list a{color:var(--text-muted);transition:var(--transition)}
.breadcrumb-list a:hover{color:var(--primary)}
.breadcrumb-sep{color:var(--border)}
.breadcrumb-current{color:var(--primary);font-weight:600}

/* ---- 标签云 ---- */
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
.tag{padding:6px 16px;background:var(--bg-light);border:1px solid var(--border);border-radius:20px;font-size:.85rem;color:var(--text-muted);transition:var(--transition)}
.tag:hover{background:var(--primary);color:#fff;border-color:var(--primary)}

/* ---- 分享按钮 ---- */
.share-bar{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.share-label{font-size:.88rem;color:var(--text-muted);font-weight:600}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:20px;font-size:.82rem;font-weight:600;transition:var(--transition)}
.share-wechat{background:#07c160;color:#fff}
.share-weibo{background:#e6162d;color:#fff}
.share-douyin{background:#000;color:#fff}
.share-bilibili{background:#00a1d6;color:#fff}
.share-btn:hover{opacity:.85;transform:translateY(-2px)}

/* ---- 页脚 ---- */
.footer{background:var(--secondary);color:rgba(255,255,255,.75);padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:48px}
.footer-brand .footer-logo{width:50px;margin-bottom:14px}
.footer-brand-name{font-size:1.4rem;font-weight:800;color:#fff;margin-bottom:10px}
.footer-brand-desc{font-size:.88rem;line-height:1.7;margin-bottom:20px}
.footer-social{display:flex;gap:10px}
.social-icon{width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center;font-size:.85rem;transition:var(--transition)}
.social-icon:hover{background:var(--primary);transform:translateY(-3px)}
.footer-col h4{font-size:1rem;font-weight:700;color:#fff;margin-bottom:16px;padding-bottom:8px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-links{display:flex;flex-direction:column;gap:8px}
.footer-links a{font-size:.88rem;color:rgba(255,255,255,.65);transition:var(--transition)}
.footer-links a:hover{color:var(--primary-light);padding-left:4px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;display:flex;justify-content:space-between;align-items:center;flex-wrap:gap;gap:12px;font-size:.82rem;color:rgba(255,255,255,.5)}
.footer-bottom a{color:rgba(255,255,255,.5);transition:var(--transition)}
.footer-bottom a:hover{color:var(--primary-light)}

/* ---- 内页横幅 ---- */
.page-banner{background:linear-gradient(135deg,var(--secondary) 0%,var(--primary-dark) 100%);padding:60px 0;text-align:center;position:relative;overflow:hidden}
.page-banner::before{content:'';position:absolute;inset:0;background:url('../images/hero-banner.jpg') center/cover no-repeat;opacity:.15}
.page-banner-content{position:relative;z-index:2}
.page-banner h1{font-size:2.4rem;font-weight:900;color:#fff;margin-bottom:12px}
.page-banner p{font-size:1rem;color:rgba(255,255,255,.8);max-width:600px;margin:0 auto}

/* ---- 分页 ---- */
.pagination{display:flex;justify-content:center;gap:8px;margin-top:40px}
.page-btn{width:40px;height:40px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:.9rem;border:1px solid var(--border);color:var(--text-muted);transition:var(--transition)}
.page-btn:hover,.page-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}

/* ---- 弹幕效果 ---- */
.danmu-bar{background:rgba(0,0,0,.85);padding:10px 0;overflow:hidden;position:relative;height:40px}
.danmu-track{display:flex;gap:60px;animation:danmu-scroll 25s linear infinite;white-space:nowrap}
.danmu-track:hover{animation-play-state:paused}
.danmu-item{font-size:.85rem;color:#fff;opacity:.85;flex-shrink:0}
.danmu-item span{color:var(--accent-gold)}
@keyframes danmu-scroll{0%{transform:translateX(0)}100%{transform:translateX(-50%)}}

/* ---- 加载动画 ---- */
.skeleton{background:linear-gradient(90deg,#f0f0f0 25%,#e0e0e0 50%,#f0f0f0 75%);background-size:200% 100%;animation:skeleton-loading 1.5s infinite;border-radius:var(--radius)}
@keyframes skeleton-loading{0%{background-position:200% 0}100%{background-position:-200% 0}}

/* ---- 回到顶部 ---- */
.back-to-top{position:fixed;bottom:30px;right:30px;width:44px;height:44px;background:var(--primary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.2rem;box-shadow:0 4px 16px rgba(192,24,30,.4);opacity:0;visibility:hidden;transition:var(--transition);z-index:999}
.back-to-top.visible{opacity:1;visibility:visible}
.back-to-top:hover{background:var(--primary-dark);transform:translateY(-3px)}

/* ---- 通知条 ---- */
.notice-bar{background:linear-gradient(90deg,var(--primary),var(--primary-dark));color:#fff;padding:8px 0;font-size:.85rem}
.notice-bar .container{display:flex;align-items:center;gap:12px}
.notice-tag{background:rgba(255,255,255,.25);padding:2px 10px;border-radius:12px;font-size:.78rem;font-weight:700;flex-shrink:0}
.notice-text{flex:1;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}

/* ---- 响应式 ---- */
@media(max-width:1024px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .hero-title{font-size:2rem}
  .section{padding:48px 0}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr}
  .feature-grid{grid-template-columns:1fr}
  .nav-menu{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;padding:16px;box-shadow:0 8px 24px rgba(0,0,0,.1);border-top:1px solid var(--border)}
  .nav-menu.open{display:flex}
  .nav-toggle{display:flex}
  .navbar-inner{flex-wrap:wrap;height:auto;padding:12px 0}
  .top-bar-left{display:none}
  .hero-stats{gap:20px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;text-align:center}
  .video-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
}
@media(max-width:480px){
  .hero-title{font-size:1.6rem}
  .hero-actions{flex-direction:column}
  .btn-lg{width:100%;justify-content:center}
  .stats-grid{grid-template-columns:1fr 1fr}
  .section-title{font-size:1.5rem}
}