/* ============================================
   青柠视频传媒 - 全新原创样式表
   配色方案：琥珀金 #D4A853 + 深棕 #3A2518 + 暖白 #FFF8F0
   域名：tw235383.cn
   ============================================ */

/* === 基础重置 === */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:#3A2518;background:#FFF8F0;line-height:1.75;overflow-x:hidden}
a{color:#D4A853;text-decoration:none;transition:color .3s}
a:hover{color:#B8872E}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}

/* === 容器 === */
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}

/* === 顶部导航 === */
.site-header{background:linear-gradient(135deg,#3A2518 0%,#5C3D2E 100%);position:sticky;top:0;z-index:999;box-shadow:0 2px 12px rgba(58,37,24,.25)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px;max-width:1200px;margin:0 auto;padding:0 20px}
.brand-logo{display:flex;align-items:center;gap:10px}
.brand-logo img{width:42px;height:42px;border-radius:50%}
.brand-logo span{font-size:1.35rem;font-weight:700;color:#D4A853;letter-spacing:2px}
.main-nav{display:flex;gap:6px}
.main-nav a{color:#FFF8F0;padding:8px 16px;border-radius:20px;font-size:.9rem;transition:all .3s}
.main-nav a:hover,.main-nav a.on{background:#D4A853;color:#3A2518}
.menu-toggle{display:none;background:none;border:none;cursor:pointer;padding:6px}
.menu-toggle span{display:block;width:26px;height:3px;background:#D4A853;margin:5px 0;border-radius:2px;transition:all .3s}

/* === 搜索栏 === */
.search-bar{background:#F5EDE0;padding:14px 0;border-bottom:1px solid #E8D9C5}
.search-box{display:flex;max-width:560px;margin:0 auto;border-radius:28px;overflow:hidden;box-shadow:0 2px 8px rgba(58,37,24,.08)}
.search-box input{flex:1;border:none;padding:12px 22px;font-size:.95rem;background:#fff;color:#3A2518;outline:none}
.search-box button{background:#D4A853;color:#fff;border:none;padding:0 28px;font-size:.95rem;cursor:pointer;transition:background .3s}
.search-box button:hover{background:#B8872E}

/* === Hero区域 === */
.hero{position:relative;height:520px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(.65)}
.hero-content{position:relative;z-index:2;text-align:center;color:#fff;padding:0 20px}
.hero-content h1{font-size:2.8rem;font-weight:800;text-shadow:0 3px 12px rgba(0,0,0,.5);margin-bottom:12px}
.hero-content h2{font-size:1.25rem;font-weight:400;opacity:.92;text-shadow:0 2px 6px rgba(0,0,0,.4);margin-bottom:24px}
.hero-btn{display:inline-block;background:#D4A853;color:#3A2518;padding:14px 42px;border-radius:30px;font-size:1.05rem;font-weight:600;transition:all .3s;box-shadow:0 4px 16px rgba(212,168,83,.4)}
.hero-btn:hover{background:#B8872E;color:#fff;transform:translateY(-2px)}

/* === 通用区块 === */
.section{padding:60px 0}
.section-alt{background:#F5EDE0}
.section-dark{background:#3A2518;color:#FFF8F0}
.section-title{text-align:center;margin-bottom:42px}
.section-title h2{font-size:1.85rem;font-weight:700;color:#3A2518;position:relative;display:inline-block;padding-bottom:12px}
.section-title h2::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:60px;height:3px;background:linear-gradient(90deg,#D4A853,#B8872E);border-radius:2px}
.section-dark .section-title h2{color:#D4A853}
.section-title p{color:#7A6552;margin-top:10px;font-size:.95rem}
.section-dark .section-title p{color:#C9B99A}

/* === 视频卡片网格 === */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.video-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 3px 14px rgba(58,37,24,.08);transition:all .35s;cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:0 8px 28px rgba(58,37,24,.15)}
.video-thumb{position:relative;overflow:hidden;aspect-ratio:16/9}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.video-card:hover .video-thumb img{transform:scale(1.08)}
.play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%) scale(0);width:56px;height:56px;background:rgba(212,168,83,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:all .35s;opacity:0}
.play-btn::after{content:'';border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:3px}
.video-card:hover .play-btn{transform:translate(-50%,-50%) scale(1);opacity:1}
.video-info{padding:14px 16px}
.video-info h3{font-size:.95rem;font-weight:600;color:#3A2518;margin-bottom:6px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.video-meta{display:flex;gap:12px;font-size:.8rem;color:#9A8672}
.video-meta span{display:flex;align-items:center;gap:3px}
.video-tag{display:inline-block;background:#F5EDE0;color:#D4A853;font-size:.72rem;padding:2px 8px;border-radius:10px;margin-top:6px}

/* === 双栏布局 === */
.dual-cols{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.dual-cols img{border-radius:14px;box-shadow:0 4px 20px rgba(58,37,24,.1)}
.dual-text h3{font-size:1.45rem;font-weight:700;color:#3A2518;margin-bottom:14px}
.dual-text p{color:#5C3D2E;line-height:1.85;margin-bottom:12px}

/* === 专家卡片 === */
.expert-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.expert-card{display:flex;gap:20px;background:#fff;padding:24px;border-radius:14px;box-shadow:0 3px 14px rgba(58,37,24,.07);transition:all .3s}
.expert-card:hover{box-shadow:0 6px 24px rgba(58,37,24,.14)}
.expert-card img{width:90px;height:90px;border-radius:50%;object-fit:cover;border:3px solid #D4A853}
.expert-info h4{font-size:1.05rem;font-weight:700;color:#3A2518;margin-bottom:4px}
.expert-info .title{color:#D4A853;font-size:.85rem;margin-bottom:8px}
.expert-info p{font-size:.85rem;color:#7A6552;line-height:1.6}
.expert-btns{margin-top:10px;display:flex;gap:8px}
.expert-btns a{font-size:.78rem;padding:5px 14px;border-radius:16px;border:1px solid #D4A853;color:#D4A853;transition:all .3s}
.expert-btns a:hover{background:#D4A853;color:#fff}

/* === FAQ === */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border-bottom:1px solid #E8D9C5;padding:18px 0}
.faq-q{display:flex;justify-content:space-between;align-items:center;cursor:pointer;font-weight:600;color:#3A2518;font-size:1rem}
.faq-q::after{content:'+';font-size:1.4rem;color:#D4A853;transition:transform .3s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease;color:#5C3D2E;font-size:.9rem;line-height:1.8}
.faq-item.open .faq-a{max-height:300px;padding-top:12px}

/* === 用户评价 === */
.review-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.review-card{background:#fff;padding:22px;border-radius:12px;box-shadow:0 2px 10px rgba(58,37,24,.06)}
.review-stars{color:#D4A853;font-size:1rem;margin-bottom:8px;letter-spacing:2px}
.review-card p{font-size:.88rem;color:#5C3D2E;line-height:1.7;margin-bottom:10px;font-style:italic}
.review-user{font-size:.82rem;color:#9A8672;font-weight:600}

/* === How-To === */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
.howto-step{text-align:center;padding:28px 18px;background:#fff;border-radius:14px;box-shadow:0 2px 10px rgba(58,37,24,.06);position:relative}
.howto-step::before{counter-increment:step;content:counter(step);display:flex;align-items:center;justify-content:center;width:44px;height:44px;background:linear-gradient(135deg,#D4A853,#B8872E);color:#fff;border-radius:50%;font-size:1.15rem;font-weight:700;margin:0 auto 14px}
.howto-step h4{font-size:.95rem;font-weight:700;color:#3A2518;margin-bottom:8px}
.howto-step p{font-size:.82rem;color:#7A6552;line-height:1.6}

/* === 合作品牌 === */
.brand-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:28px;padding:20px 0}
.brand-wall span{background:#fff;padding:14px 28px;border-radius:10px;font-size:.9rem;color:#5C3D2E;font-weight:600;box-shadow:0 2px 8px rgba(58,37,24,.06);transition:all .3s}
.brand-wall span:hover{background:#D4A853;color:#fff}

/* === 联系信息 === */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.contact-card{text-align:center;padding:28px;background:#fff;border-radius:14px;box-shadow:0 2px 10px rgba(58,37,24,.06)}
.contact-card h4{font-size:1rem;font-weight:700;color:#3A2518;margin-bottom:10px}
.contact-card p{font-size:.88rem;color:#5C3D2E;line-height:1.7}
.contact-card img{width:140px;height:140px;margin:12px auto 0;border-radius:8px}

/* === 社交分享 === */
.m7i17a4t{display:flex;justify-content:center;gap:14px;padding:20px 0}
.m7i17a4t a{display:flex;align-items:center;gap:6px;padding:8px 20px;border-radius:20px;font-size:.85rem;color:#fff;transition:all .3s}
.m7i17a4t a:hover{opacity:.85;transform:translateY(-2px)}
.mr6iggf8{background:#07C160}
.352e6{background:#E6162D}
.6vlq5q2y{background:#161823}
.xl0zuiw{background:#00A1D6}

/* === 页脚 === */
.site-footer{background:#2A1810;color:#C9B99A;padding:40px 0 20px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;margin-bottom:30px}
.footer-brand h3{color:#D4A853;font-size:1.2rem;margin-bottom:10px}
.footer-brand p{font-size:.85rem;line-height:1.7;color:#9A8672}
.footer-col h4{color:#D4A853;font-size:.95rem;margin-bottom:14px}
.footer-col a{display:block;color:#9A8672;font-size:.85rem;padding:3px 0;transition:color .3s}
.footer-col a:hover{color:#D4A853}
.footer-qr{display:flex;gap:16px;margin-top:12px}
.footer-qr img{width:100px;height:100px;border-radius:6px}
.footer-bottom{border-top:1px solid #3A2518;padding-top:18px;text-align:center;font-size:.82rem;color:#7A6552}
.footer-bottom a{color:#D4A853}

/* === 面包屑 === */
.breadcrumb{padding:14px 0;font-size:.85rem;color:#9A8672}
.breadcrumb a{color:#D4A853}
.breadcrumb span{margin:0 6px}

/* === 内页Banner === */
.page-banner{height:280px;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
.page-banner-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(.5)}
.page-banner h1{position:relative;z-index:2;color:#fff;font-size:2.2rem;font-weight:800;text-shadow:0 3px 10px rgba(0,0,0,.5)}

/* === MCP Widget === */
.1i7ws{background:#F5EDE0;border:1px dashed #D4A853;border-radius:12px;padding:20px;margin:20px 0;text-align:center;font-size:.88rem;color:#7A6552}

/* === 滚动动画 === */
.fade-up{opacity:0;transform:translateY(30px);transition:all .7s ease}
.fade-up.visible{opacity:1;transform:translateY(0)}

/* === 视频弹窗 === */
.video-modal{display:none;position:fixed;inset:0;z-index:9999;background:rgba(0,0,0,.85);align-items:center;justify-content:center}
.video-modal.active{display:flex}
.video-modal-inner{background:#000;border-radius:12px;padding:20px;max-width:800px;width:90%;text-align:center;position:relative}
.video-modal-inner h3{color:#fff;margin-bottom:12px}
.video-modal-close{position:absolute;top:-14px;right:-14px;width:36px;height:36px;background:#D4A853;border:none;border-radius:50%;color:#fff;font-size:1.2rem;cursor:pointer}
.video-placeholder{background:#1a1a1a;aspect-ratio:16/9;border-radius:8px;display:flex;align-items:center;justify-content:center;color:#666;font-size:.9rem}

/* === 响应式 === */
@media(max-width:1024px){
  .video-grid{grid-template-columns:repeat(3,1fr)}
  .review-grid{grid-template-columns:repeat(2,1fr)}
  .howto-steps{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .main-nav{display:none;position:absolute;top:68px;left:0;right:0;background:#3A2518;flex-direction:column;padding:16px;border-top:1px solid #5C3D2E}
  .main-nav.open{display:flex}
  .menu-toggle{display:block}
  .hero{height:380px}
  .hero-content h1{font-size:1.8rem}
  .video-grid{grid-template-columns:repeat(2,1fr)}
  .dual-cols{grid-template-columns:1fr;gap:24px}
  .expert-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .howto-steps{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .section{padding:40px 0}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .nav-inner{height:56px}
  .brand-logo span{font-size:1.1rem}
  .hero{height:300px}
  .hero-content h1{font-size:1.5rem}
}