/* ============================================
   青柠视频 - 赛博霓虹风格原创样式
   tvotdg.cn | 游戏解说视频社区
   ============================================ */
:root{
  --c-primary:#6C5CE7;
  --c-secondary:#00D2FF;
  --c-accent:#FD79A8;
  --c-dark:#0D1117;
  --c-card:#161B22;
  --c-card2:#1C2333;
  --c-border:#30363D;
  --c-text:#E6EDF3;
  --c-text2:#8B949E;
  --c-glow:rgba(108,92,231,.35);
  --radius:12px;
  --shadow:0 4px 24px rgba(0,0,0,.4);
  --transition:.3s ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--c-dark);color:var(--c-text);line-height:1.7;overflow-x:hidden}
a{color:var(--c-secondary);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--c-accent)}
img{max-width:100%;height:auto;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* === 导航 === */
.tx-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(13,17,23,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--c-border);transition:var(--transition)}
.tx-nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.tx-logo{display:flex;align-items:center;gap:10px}
.tx-logo img{height:36px;width:auto}
.tx-logo span{font-size:1.2rem;font-weight:700;background:linear-gradient(135deg,var(--c-primary),var(--c-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.tx-nav-links{display:flex;gap:24px;list-style:none}
.tx-nav-links a{color:var(--c-text2);font-size:.95rem;padding:6px 0;position:relative}
.tx-nav-links a:hover,.tx-nav-links a.active{color:var(--c-text)}
.tx-nav-links a::after{content:"";position:absolute;bottom:0;left:0;width:0;height:2px;background:linear-gradient(90deg,var(--c-primary),var(--c-secondary));transition:var(--transition)}
.tx-nav-links a:hover::after,.tx-nav-links a.active::after{width:100%}
.tx-hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.tx-hamburger span{width:24px;height:2px;background:var(--c-text);transition:var(--transition)}

/* === 搜索框 === */
.tx-search-bar{background:var(--c-card);border-bottom:1px solid var(--c-border);padding:12px 0;margin-top:64px}
.tx-search-wrap{display:flex;gap:10px;max-width:600px;margin:0 auto}
.tx-search-wrap input{flex:1;background:var(--c-dark);border:1px solid var(--c-border);border-radius:var(--radius);padding:10px 16px;color:var(--c-text);font-size:.95rem;outline:none;transition:var(--transition)}
.tx-search-wrap input:focus{border-color:var(--c-primary);box-shadow:0 0 0 3px var(--c-glow)}
.tx-search-wrap button{background:linear-gradient(135deg,var(--c-primary),var(--c-secondary));border:none;border-radius:var(--radius);padding:10px 24px;color:#fff;font-size:.95rem;cursor:pointer;transition:var(--transition)}
.tx-search-wrap button:hover{transform:translateY(-1px);box-shadow:0 4px 16px var(--c-glow)}
.tx-search-tip{text-align:center;color:var(--c-text2);font-size:.8rem;margin-top:6px}

/* === Banner === */
.tx-banner{position:relative;height:520px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.tx-banner-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(.45)}
.tx-banner-content{position:relative;z-index:2;text-align:center;padding:0 20px;max-width:800px}
.tx-banner-content h1{font-size:2.8rem;font-weight:800;margin-bottom:16px;background:linear-gradient(135deg,#fff,var(--c-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.tx-banner-content p{font-size:1.15rem;color:rgba(255,255,255,.85);line-height:1.8;margin-bottom:24px}
.tx-banner-content .tx-btn{display:inline-block}

/* === 通用区块 === */
.tx-section{padding:64px 0}
.tx-section-title{text-align:center;margin-bottom:48px}
.tx-section-title h2{font-size:1.8rem;font-weight:700;margin-bottom:8px}
.tx-section-title h2 em{font-style:normal;background:linear-gradient(135deg,var(--c-primary),var(--c-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.tx-section-title p{color:var(--c-text2);font-size:1rem}

/* === 按钮 === */
.tx-btn{display:inline-block;padding:12px 28px;border-radius:var(--radius);font-weight:600;font-size:.95rem;transition:var(--transition);cursor:pointer;border:none}
.tx-btn-primary{background:linear-gradient(135deg,var(--c-primary),var(--c-secondary));color:#fff}
.tx-btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px var(--c-glow);color:#fff}
.tx-btn-outline{border:1px solid var(--c-primary);color:var(--c-primary);background:transparent}
.tx-btn-outline:hover{background:var(--c-primary);color:#fff}

/* === 数据统计 === */
.tx-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:40px 0}
.tx-stat-card{text-align:center;padding:28px 16px;background:var(--c-card);border-radius:var(--radius);border:1px solid var(--c-border);transition:var(--transition)}
.tx-stat-card:hover{border-color:var(--c-primary);transform:translateY(-4px);box-shadow:0 8px 30px var(--c-glow)}
.tx-stat-num{font-size:2.2rem;font-weight:800;background:linear-gradient(135deg,var(--c-primary),var(--c-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.tx-stat-label{color:var(--c-text2);font-size:.9rem;margin-top:4px}

/* === 视频卡片 === */
.tx-video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.tx-video-card{background:var(--c-card);border-radius:var(--radius);overflow:hidden;border:1px solid var(--c-border);transition:var(--transition)}
.tx-video-card:hover{border-color:var(--c-primary);transform:translateY(-4px);box-shadow:0 8px 30px var(--c-glow)}
.tx-video-thumb{position:relative;aspect-ratio:16/9;overflow:hidden}
.tx-video-thumb img{width:100%;height:100%;object-fit:cover;transition:var(--transition)}
.tx-video-card:hover .tx-video-thumb img{transform:scale(1.05)}
.tx-video-play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.5);opacity:0;transition:var(--transition)}
.tx-video-card:hover .tx-video-play{opacity:1}
.tx-video-play-icon{width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,var(--c-primary),var(--c-accent));display:flex;align-items:center;justify-content:center;box-shadow:0 4px 20px rgba(108,92,231,.5)}
.tx-video-play-icon::after{content:"";border:solid #fff;border-width:0 0 10px 16px;border-color:transparent transparent transparent #fff;margin-left:4px}
.tx-video-info{padding:16px}
.tx-video-info h3{font-size:1rem;font-weight:600;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tx-video-meta{display:flex;gap:12px;color:var(--c-text2);font-size:.8rem}
.tx-video-tag{display:inline-block;background:var(--c-card2);padding:2px 8px;border-radius:4px;font-size:.75rem;color:var(--c-secondary);margin-top:6px}

/* === 功能模块网格 === */
.tx-feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.tx-feature-card{background:var(--c-card);border-radius:var(--radius);padding:32px 24px;border:1px solid var(--c-border);transition:var(--transition);text-align:center}
.tx-feature-card:hover{border-color:var(--c-secondary);transform:translateY(-4px);box-shadow:0 8px 30px rgba(0,210,255,.15)}
.tx-feature-icon{width:64px;height:64px;margin:0 auto 16px;border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:1.8rem;background:linear-gradient(135deg,var(--c-primary),var(--c-secondary))}
.tx-feature-card h3{font-size:1.1rem;margin-bottom:8px}
.tx-feature-card p{color:var(--c-text2);font-size:.9rem;line-height:1.6}

/* === 社区4列 === */
.tx-community-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.tx-community-card{background:var(--c-card);border-radius:var(--radius);overflow:hidden;border:1px solid var(--c-border);transition:var(--transition)}
.tx-community-card:hover{border-color:var(--c-accent);transform:translateY(-4px)}
.tx-community-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.tx-community-card h4{padding:12px 14px;font-size:.95rem}

/* === 专家 === */
.tx-expert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.tx-expert-card{background:var(--c-card);border-radius:var(--radius);padding:32px 24px;text-align:center;border:1px solid var(--c-border);transition:var(--transition)}
.tx-expert-card:hover{border-color:var(--c-primary);box-shadow:0 8px 30px var(--c-glow)}
.tx-expert-avatar{width:96px;height:96px;border-radius:50%;margin:0 auto 16px;overflow:hidden;border:3px solid var(--c-primary)}
.tx-expert-avatar img{width:100%;height:100%;object-fit:cover}
.tx-expert-role{color:var(--c-secondary);font-size:.85rem;margin-bottom:8px}
.tx-expert-card h3{margin-bottom:8px}
.tx-expert-card p{color:var(--c-text2);font-size:.88rem;line-height:1.6;margin-bottom:12px}
.tx-expert-btns{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}

/* === 合作品牌 === */
.tx-partner-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:24px}
.tx-partner-item{width:120px;height:60px;background:var(--c-card);border-radius:8px;display:flex;align-items:center;justify-content:center;border:1px solid var(--c-border);color:var(--c-text2);font-size:.85rem;font-weight:600;transition:var(--transition)}
.tx-partner-item:hover{border-color:var(--c-primary);color:var(--c-text)}

/* === HowTo === */
.tx-howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.tx-howto-step{background:var(--c-card);border-radius:var(--radius);padding:28px 20px;text-align:center;border:1px solid var(--c-border);position:relative;counter-increment:step}
.tx-howto-step::before{content:counter(step);display:block;width:40px;height:40px;line-height:40px;border-radius:50%;background:linear-gradient(135deg,var(--c-primary),var(--c-secondary));color:#fff;font-weight:700;margin:0 auto 12px;font-size:1.1rem}
.tx-howto-step h4{margin-bottom:6px}
.tx-howto-step p{color:var(--c-text2);font-size:.88rem}

/* === FAQ === */
.tx-faq-list{max-width:800px;margin:0 auto}
.tx-faq-item{background:var(--c-card);border-radius:var(--radius);margin-bottom:12px;border:1px solid var(--c-border);overflow:hidden}
.tx-faq-q{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;transition:var(--transition)}
.tx-faq-q:hover{color:var(--c-secondary)}
.tx-faq-q::after{content:"+";font-size:1.4rem;color:var(--c-primary);transition:var(--transition)}
.tx-faq-item.open .tx-faq-q::after{content:"-";color:var(--c-accent)}
.tx-faq-a{padding:0 24px;max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s ease}
.tx-faq-item.open .tx-faq-a{max-height:300px;padding:0 24px 18px}
.tx-faq-a p{color:var(--c-text2);line-height:1.7;font-size:.92rem}

/* === 评论 === */
.tx-review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.tx-review-card{background:var(--c-card);border-radius:var(--radius);padding:24px;border:1px solid var(--c-border)}
.tx-review-stars{color:#F1C40F;margin-bottom:8px;font-size:1rem}
.tx-review-text{color:var(--c-text2);font-size:.92rem;line-height:1.7;margin-bottom:12px;font-style:italic}
.tx-review-author{font-weight:600;font-size:.9rem}
.tx-review-date{color:var(--c-text2);font-size:.8rem}

/* === 标签云 === */
.tx-tag-cloud{display:flex;flex-wrap:wrap;justify-content:center;gap:10px}
.tx-tag{display:inline-block;padding:6px 16px;background:var(--c-card);border:1px solid var(--c-border);border-radius:20px;font-size:.85rem;color:var(--c-text2);transition:var(--transition)}
.tx-tag:hover{border-color:var(--c-primary);color:var(--c-text);background:var(--c-card2)}

/* === 联系我们 === */
.tx-contact-grid{display:grid;grid-template-columns:2fr 1fr;gap:32px}
.tx-contact-info p{color:var(--c-text2);line-height:2;font-size:.95rem}
.tx-contact-info strong{color:var(--c-text)}
.tx-contact-qr{display:flex;gap:20px}
.tx-contact-qr-item{text-align:center}
.tx-contact-qr-item img{width:140px;height:140px;border-radius:8px;border:2px solid var(--c-border)}
.tx-contact-qr-item p{font-size:.8rem;color:var(--c-text2);margin-top:6px}

/* === 页脚 === */
.tx-footer{background:var(--c-card);border-top:1px solid var(--c-border);padding:48px 0 24px}
.tx-footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:32px}
.tx-footer-grid h4{font-size:1rem;margin-bottom:16px;color:var(--c-text)}
.tx-footer-grid p,.tx-footer-grid a{color:var(--c-text2);font-size:.88rem;line-height:2}
.tx-footer-grid a:hover{color:var(--c-secondary)}
.tx-footer-bottom{border-top:1px solid var(--c-border);padding-top:20px;text-align:center;color:var(--c-text2);font-size:.82rem}
.tx-footer-bottom a{color:var(--c-text2)}

/* === 面包屑 === */
.tx-breadcrumb{padding:16px 0;font-size:.88rem;color:var(--c-text2);margin-top:76px}
.tx-breadcrumb a{color:var(--c-secondary)}

/* === 内页 === */
.tx-page-hero{padding:40px 0;text-align:center;border-bottom:1px solid var(--c-border);margin-top:76px}
.tx-page-hero h1{font-size:2rem;margin-bottom:8px}
.tx-page-hero p{color:var(--c-text2)}

/* === 响应式 === */
@media(max-width:1024px){
  .tx-video-grid,.tx-feature-grid,.tx-expert-grid{grid-template-columns:repeat(2,1fr)}
  .tx-community-grid,.tx-howto-steps{grid-template-columns:repeat(2,1fr)}
  .tx-stats{grid-template-columns:repeat(2,1fr)}
  .tx-contact-grid{grid-template-columns:1fr}
  .tx-footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .tx-nav-links{display:none;position:absolute;top:64px;left:0;width:100%;background:rgba(13,17,23,.98);flex-direction:column;padding:20px;gap:0;border-bottom:1px solid var(--c-border)}
  .tx-nav-links.open{display:flex}
  .tx-nav-links a{padding:12px 0;border-bottom:1px solid var(--c-border)}
  .tx-hamburger{display:flex}
  .tx-banner{height:400px}
  .tx-banner-content h1{font-size:1.8rem}
  .tx-video-grid,.tx-feature-grid,.tx-expert-grid,.tx-review-grid{grid-template-columns:1fr}
  .tx-community-grid{grid-template-columns:repeat(2,1fr)}
  .tx-howto-steps{grid-template-columns:1fr}
  .tx-stats{grid-template-columns:repeat(2,1fr)}
  .tx-section{padding:40px 0}
  .tx-contact-qr{flex-direction:column;align-items:center}
}
@media(max-width:480px){
  .tx-community-grid{grid-template-columns:1fr}
  .tx-stats{grid-template-columns:1fr}
  .tx-banner{height:320px}
  .tx-banner-content h1{font-size:1.5rem}
}