/* ============================================
   抖阴 - 植物视频社区 全站样式表
   bantauh.cn | 梅花风格主题
   ============================================ */

/* === 基础重置 === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;color:#333;line-height:1.8;background:#faf8f5}
a{color:#c0392b;text-decoration:none;transition:color .3s}
a:hover{color:#e74c3c}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.4;color:#2c3e50}

/* === 容器 === */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:60px 0}
.section-title{text-align:center;margin-bottom:40px;font-size:28px;position:relative}
.section-title::after{content:"";display:block;width:60px;height:3px;background:linear-gradient(90deg,#e8a0bf,#c0392b);margin:12px auto 0}
.section-subtitle{text-align:center;color:#888;font-size:15px;margin-top:-30px;margin-bottom:30px}

/* === 头部导航 === */
.site-header{background:rgba(255,255,255,.97);position:sticky;top:0;z-index:1000;box-shadow:0 2px 12px rgba(0,0,0,.08);backdrop-filter:blur(10px)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo-area{display:flex;align-items:center;gap:10px}
.logo-area img{height:45px;width:auto}
.logo-area .brand-name{font-size:22px;font-weight:800;color:#c0392b;letter-spacing:1px}
.main-nav{display:flex;gap:0}
.main-nav a{padding:0 18px;height:70px;line-height:70px;font-size:15px;color:#555;font-weight:500;transition:all .3s;position:relative}
.main-nav a:hover,.main-nav a.active{color:#c0392b}
.main-nav a::after{content:"";position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:0;height:3px;background:#c0392b;transition:width .3s}
.main-nav a:hover::after,.main-nav a.active::after{width:60%}
.mobile-menu-btn{display:none;font-size:24px;cursor:pointer;background:none;border:none;color:#333}

/* === 搜索框 === */
.search-bar{background:#f5f0eb;padding:12px 0;border-bottom:1px solid #e8e0d8}
.search-bar .container{display:flex;justify-content:center}
.search-box{display:flex;max-width:600px;width:100%}
.search-box input{flex:1;padding:10px 18px;border:2px solid #ddd;border-right:none;border-radius:25px 0 0 25px;font-size:14px;outline:none;transition:border-color .3s}
.search-box input:focus{border-color:#c0392b}
.search-box button{padding:10px 28px;background:#c0392b;color:#fff;border:none;border-radius:0 25px 25px 0;cursor:pointer;font-size:14px;transition:background .3s}
.search-box button:hover{background:#a93226}

/* === Banner区域 === */
.hero-banner{position:relative;height:520px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.hero-banner .banner-bg{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;filter:brightness(.85)}
.hero-banner .banner-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(135deg,rgba(192,57,43,.4),rgba(44,62,80,.5))}
.hero-content{position:relative;z-index:2;text-align:center;color:#fff;padding:0 20px}
.hero-content h1{font-size:48px;margin-bottom:15px;text-shadow:2px 2px 8px rgba(0,0,0,.5);letter-spacing:3px}
.hero-content .hero-desc{font-size:18px;max-width:700px;margin:0 auto 25px;line-height:1.8;text-shadow:1px 1px 4px rgba(0,0,0,.4)}
.hero-content .hero-tags{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.hero-content .hero-tags span{background:rgba(255,255,255,.2);padding:6px 16px;border-radius:20px;font-size:13px;backdrop-filter:blur(5px);border:1px solid rgba(255,255,255,.3)}

/* === 面包屑 === */
.breadcrumb{padding:12px 0;font-size:13px;color:#999}
.breadcrumb a{color:#c0392b}
.breadcrumb span{margin:0 6px;color:#ccc}

/* === 视频卡片 === */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.video-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 15px rgba(0,0,0,.08);transition:transform .3s,box-shadow .3s;cursor:pointer}
.video-card:hover{transform:translateY(-5px);box-shadow:0 8px 25px rgba(0,0,0,.15)}
.video-card .thumb{position:relative;padding-top:56.25%;overflow:hidden}
.video-card .thumb img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.video-card:hover .thumb img{transform:scale(1.08)}
.video-card .play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:56px;height:56px;background:rgba(192,57,43,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;pointer-events:none}
.video-card:hover .play-btn{opacity:1}
.play-btn::after{content:"";display:block;width:0;height:0;border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:3px}
.video-card .duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.7);color:#fff;padding:2px 8px;border-radius:4px;font-size:12px}
.video-card .card-info{padding:14px}
.video-card .card-title{font-size:15px;font-weight:600;color:#2c3e50;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-card .card-meta{display:flex;justify-content:space-between;font-size:12px;color:#999}
.video-card .card-meta .views{display:flex;align-items:center;gap:4px}
.video-card .card-tags{margin-top:8px;display:flex;flex-wrap:wrap;gap:5px}
.video-card .card-tags span{background:#fdf0ed;color:#c0392b;padding:2px 8px;border-radius:10px;font-size:11px}

/* === 模块卡片 === */
.module-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}
.module-card{background:#fff;border-radius:12px;padding:30px;text-align:center;box-shadow:0 4px 15px rgba(0,0,0,.06);transition:transform .3s}
.module-card:hover{transform:translateY(-3px)}
.module-card .icon{font-size:42px;margin-bottom:15px}
.module-card h4{font-size:18px;margin-bottom:10px;color:#2c3e50}
.module-card p{font-size:14px;color:#777;line-height:1.7}

/* === 专家展示 === */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.expert-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 15px rgba(0,0,0,.06);text-align:center;transition:transform .3s}
.expert-card:hover{transform:translateY(-3px)}
.expert-card .expert-photo{height:200px;overflow:hidden}
.expert-card .expert-photo img{width:100%;height:100%;object-fit:cover}
.expert-card .expert-info{padding:18px}
.expert-card .expert-name{font-size:17px;font-weight:700;color:#2c3e50;margin-bottom:5px}
.expert-card .expert-title{font-size:13px;color:#c0392b;margin-bottom:8px}
.expert-card .expert-desc{font-size:13px;color:#888;line-height:1.6}
.expert-card .expert-btn{display:inline-block;margin-top:12px;padding:6px 20px;background:#c0392b;color:#fff;border-radius:20px;font-size:13px;transition:background .3s}
.expert-card .expert-btn:hover{background:#a93226;color:#fff}

/* === FAQ === */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:10px;margin-bottom:12px;box-shadow:0 2px 8px rgba(0,0,0,.05);overflow:hidden}
.faq-item .faq-q{padding:18px 22px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-size:15px;color:#2c3e50;transition:background .3s}
.faq-item .faq-q:hover{background:#fdf0ed}
.faq-item .faq-q::after{content:"+";font-size:20px;color:#c0392b;transition:transform .3s}
.faq-item.active .faq-q::after{transform:rotate(45deg)}
.faq-item .faq-a{padding:0 22px;max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s ease;font-size:14px;color:#666;line-height:1.8}
.faq-item.active .faq-a{max-height:300px;padding:0 22px 18px}

/* === 用户评论 === */
.review-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.review-card{background:#fff;border-radius:12px;padding:22px;box-shadow:0 4px 12px rgba(0,0,0,.06)}
.review-card .stars{color:#f39c12;font-size:16px;margin-bottom:8px}
.review-card .review-text{font-size:14px;color:#555;line-height:1.7;margin-bottom:12px;font-style:italic}
.review-card .reviewer{display:flex;align-items:center;gap:10px}
.review-card .reviewer .avatar{width:36px;height:36px;border-radius:50%;background:#e8a0bf;display:flex;align-items:center;justify-content:center;color:#fff;font-size:14px;font-weight:700}
.review-card .reviewer .name{font-size:13px;color:#333;font-weight:600}
.review-card .reviewer .date{font-size:11px;color:#aaa}

/* === 合作品牌 === */
.partner-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.partner-wall .partner-item{background:#fff;padding:15px 25px;border-radius:10px;box-shadow:0 2px 8px rgba(0,0,0,.05);font-size:16px;font-weight:600;color:#666;transition:transform .3s}
.partner-wall .partner-item:hover{transform:scale(1.05)}

/* === 社交分享 === */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.share-bar a{display:flex;align-items:center;gap:6px;padding:8px 18px;border-radius:20px;color:#fff;font-size:13px;transition:opacity .3s}
.share-bar a:hover{opacity:.85;color:#fff}
.share-wechat{background:#07c160}
.share-weibo{background:#e6162d}
.share-douyin{background:#161823}
.share-bilibili{background:#00a1d6}

/* === 页脚 === */
.site-footer{background:#2c3e50;color:#ccc;padding:50px 0 20px}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;margin-bottom:30px}
.footer-col h5{color:#fff;font-size:16px;margin-bottom:15px;position:relative;padding-bottom:10px}
.footer-col h5::after{content:"";position:absolute;bottom:0;left:0;width:30px;height:2px;background:#c0392b}
.footer-col p,.footer-col a{font-size:13px;color:#aaa;line-height:2}
.footer-col a:hover{color:#e8a0bf}
.footer-col .qrcode-img{width:120px;border-radius:8px;margin-top:8px}
.footer-bottom{border-top:1px solid #3d566e;padding-top:20px;text-align:center;font-size:13px;color:#888}
.footer-bottom .update-time{margin-top:5px;font-size:12px;color:#777}

/* === 联系我们 === */
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:30px}
.contact-card{background:#fff;border-radius:12px;padding:30px;box-shadow:0 4px 15px rgba(0,0,0,.06)}
.contact-card h4{font-size:18px;color:#2c3e50;margin-bottom:15px;border-left:4px solid #c0392b;padding-left:12px}
.contact-card p{font-size:14px;color:#666;line-height:2}

/* === 联系表单 === */
.contact-form{background:#fff;border-radius:12px;padding:35px;box-shadow:0 4px 15px rgba(0,0,0,.06);max-width:700px;margin:0 auto}
.contact-form .form-group{margin-bottom:20px}
.contact-form .form-group label{display:block;font-size:14px;font-weight:600;color:#2c3e50;margin-bottom:6px}
.contact-form .form-group input,.contact-form .form-group select,.contact-form .form-group textarea{width:100%;padding:10px 14px;border:2px solid #e0d8d0;border-radius:8px;font-size:14px;outline:none;transition:border-color .3s;font-family:inherit}
.contact-form .form-group input:focus,.contact-form .form-group select:focus,.contact-form .form-group textarea:focus{border-color:#c0392b}
.contact-form .submit-btn{display:block;width:100%;padding:12px;background:#c0392b;color:#fff;border:none;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:background .3s}
.contact-form .submit-btn:hover{background:#a93226}

/* === How-To指南 === */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:30px}
.howto-step{text-align:center;padding:25px 15px;background:#fff;border-radius:12px;box-shadow:0 4px 12px rgba(0,0,0,.06)}
.howto-step .step-num{width:45px;height:45px;border-radius:50%;background:#c0392b;color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:700;margin:0 auto 12px}
.howto-step h5{font-size:15px;margin-bottom:8px;color:#2c3e50}
.howto-step p{font-size:13px;color:#888}

/* === 内页通用 === */
.page-hero{height:300px;position:relative;display:flex;align-items:center;justify-content:center;overflow:hidden}
.page-hero .banner-bg{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;filter:brightness(.7)}
.page-hero .banner-overlay,.banner-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(135deg,rgba(192,57,43,.35),rgba(44,62,80,.45))}
.page-hero .page-hero-content{position:relative;z-index:2;text-align:center;color:#fff}
.page-hero .page-hero-content h1{font-size:36px;text-shadow:2px 2px 6px rgba(0,0,0,.5)}
.page-hero .page-hero-content p{font-size:16px;margin-top:10px;text-shadow:1px 1px 4px rgba(0,0,0,.3)}

.content-area{padding:40px 0}
.content-area article{background:#fff;border-radius:12px;padding:35px;box-shadow:0 4px 15px rgba(0,0,0,.06);margin-bottom:25px}
.content-area article h2{font-size:22px;color:#2c3e50;margin-bottom:15px;border-left:4px solid #c0392b;padding-left:12px}
.content-area article h3{font-size:18px;color:#c0392b;margin:20px 0 10px}
.content-area article p{font-size:15px;color:#555;line-height:1.9;margin-bottom:12px}

/* === 懒加载 === */
img[data-src]{opacity:0;transition:opacity .5s}
img.loaded{opacity:1}

/* === 干扰标签隐藏 === */
.gt-noise{position:absolute;width:0;height:0;overflow:hidden;opacity:0;pointer-events:none;z-index:-9999}

/* === 响应式 === */
@media(max-width:1024px){
  .video-grid{grid-template-columns:repeat(3,1fr)}
  .expert-grid{grid-template-columns:repeat(2,1fr)}
  .review-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .howto-steps{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .header-inner{flex-wrap:wrap}
  .main-nav{display:none;flex-direction:column;width:100%;background:#fff;position:absolute;top:70px;left:0;box-shadow:0 4px 12px rgba(0,0,0,.1)}
  .main-nav.show{display:flex}
  .main-nav a{height:50px;line-height:50px;border-bottom:1px solid #f0f0f0;padding:0 20px}
  .mobile-menu-btn{display:block}
  .hero-banner{height:380px}
  .hero-content h1{font-size:30px}
  .hero-content .hero-desc{font-size:15px}
  .video-grid{grid-template-columns:repeat(2,1fr)}
  .module-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .howto-steps{grid-template-columns:1fr}
  .section{padding:40px 0}
  .section-title{font-size:22px}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .hero-banner{height:300px}
  .hero-content h1{font-size:24px}
  .search-box input{padding:8px 14px}
}