/*
   四虎视频 - 原创样式表
   品牌：四虎视频 | 域名：xtcyvra.cn
   主题：植物公司+视频社区 | 豪宅风格
   配色：翡翠绿 #0d7c3e + 金色 #c9a84c + 深墨绿 #0a2e1a + 象牙白 #f8f5ec
*/
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;color:#2d2d2d;background:#f8f5ec;line-height:1.7}
a{color:#0d7c3e;text-decoration:none;transition:color .3s}
a:hover{color:#c9a84c}
img{max-width:100%;height:auto;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
section{padding:60px 0}

/* 头部导航 */
.site-header{background:linear-gradient(135deg,#0a2e1a 0%,#0d5c2e 100%);position:sticky;top:0;z-index:1000;box-shadow:0 2px 20px rgba(0,0,0,.3)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;max-width:1200px;margin:0 auto}
.logo-link{display:flex;align-items:center;gap:10px}
.logo-img{width:48px;height:48px;border-radius:8px}
.logo-text{font-size:1.6rem;font-weight:700;color:#c9a84c;letter-spacing:2px}
.main-nav{display:flex;gap:6px;list-style:none}
.main-nav a{color:#e8e0cc;padding:8px 16px;border-radius:6px;font-size:.95rem;transition:all .3s}
.main-nav a:hover,.main-nav a.active{background:rgba(201,168,76,.2);color:#c9a84c}
.mobile-menu-btn{display:none;background:none;border:none;color:#c9a84c;font-size:1.5rem;cursor:pointer}

/* 搜索栏 */
.search-bar{background:#0a2e1a;padding:12px 0;border-bottom:1px solid rgba(201,168,76,.15)}
.search-wrapper{max-width:600px;margin:0 auto;display:flex;gap:8px;padding:0 20px}
.search-input{flex:1;padding:10px 18px;border:2px solid rgba(201,168,76,.3);border-radius:25px;background:rgba(255,255,255,.08);color:#e8e0cc;font-size:.95rem;outline:none;transition:border-color .3s}
.search-input:focus{border-color:#c9a84c}
.search-input::placeholder{color:rgba(232,224,204,.4)}
.search-btn{padding:10px 24px;background:linear-gradient(135deg,#c9a84c,#a8882e);color:#0a2e1a;border:none;border-radius:25px;cursor:pointer;font-weight:600;transition:transform .2s}
.search-btn:hover{transform:scale(1.05)}

/* Banner区域 */
.hero-section{position:relative;min-height:520px;display:flex;align-items:center;overflow:hidden}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;background-repeat:no-repeat}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(10,46,26,.92) 0%,rgba(13,92,46,.75) 50%,rgba(10,46,26,.88) 100%)}
.hero-content{position:relative;z-index:2;max-width:1200px;margin:0 auto;padding:80px 20px;text-align:center}
.hero-content h1{font-size:2.8rem;color:#c9a84c;margin-bottom:16px;text-shadow:0 2px 10px rgba(0,0,0,.3)}
.hero-content h1 .brand-hl{color:#fff;font-size:3.2rem}
.hero-content p{font-size:1.15rem;color:#d4cbb8;max-width:700px;margin:0 auto 30px;line-height:1.8}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn-primary{display:inline-block;padding:14px 36px;background:linear-gradient(135deg,#c9a84c,#a8882e);color:#0a2e1a;border-radius:30px;font-weight:700;font-size:1rem;transition:all .3s;box-shadow:0 4px 15px rgba(201,168,76,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 25px rgba(201,168,76,.5);color:#0a2e1a}
.btn-outline{display:inline-block;padding:14px 36px;border:2px solid #c9a84c;color:#c9a84c;border-radius:30px;font-weight:600;font-size:1rem;transition:all .3s}
.btn-outline:hover{background:#c9a84c;color:#0a2e1a}

/* 面包屑 */
.breadcrumb{padding:12px 0;font-size:.88rem;color:#6b7c6e}
.breadcrumb a{color:#0d7c3e}
.breadcrumb span{margin:0 6px;color:#999}

/* 区块标题 */
.section-title{text-align:center;margin-bottom:45px}
.section-title h2{font-size:2rem;color:#0a2e1a;margin-bottom:10px;position:relative;display:inline-block}
.section-title h2::after{content:'';display:block;width:60px;height:3px;background:linear-gradient(90deg,#0d7c3e,#c9a84c);margin:12px auto 0;border-radius:2px}
.section-title p{color:#5a6b5e;font-size:1rem;margin-top:10px}
.section-alt{background:#eef5e9}

/* 视频卡片网格 */
.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.video-card{border-radius:12px;overflow:hidden;background:#fff;box-shadow:0 4px 20px rgba(0,0,0,.08);transition:all .3s}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 35px rgba(0,0,0,.15)}
.video-thumb{position:relative;padding-top:66.67%;overflow:hidden}
.video-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.video-card:hover .video-thumb img{transform:scale(1.08)}
.play-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(10,46,26,.4);opacity:0;transition:opacity .3s}
.video-card:hover .play-overlay{opacity:1}
.play-btn-icon{width:60px;height:60px;background:rgba(201,168,76,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.5rem;color:#0a2e1a;box-shadow:0 4px 15px rgba(0,0,0,.2);transition:transform .3s}
.play-btn-icon:hover{transform:scale(1.15)}
.video-info{padding:16px}
.video-info h3{font-size:1.05rem;color:#0a2e1a;margin-bottom:8px;line-height:1.4}
.video-info h3 a{color:#0a2e1a}
.video-info h3 a:hover{color:#0d7c3e}
.video-meta{display:flex;gap:12px;font-size:.82rem;color:#7a8c7e;margin-bottom:8px}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(10,46,26,.85);color:#c9a84c;padding:2px 8px;border-radius:4px;font-size:.78rem;font-weight:600}
.video-tags{display:flex;gap:6px;flex-wrap:wrap}
.tag{padding:3px 10px;background:#eef5e9;color:#0d7c3e;border-radius:12px;font-size:.78rem}

/* 服务模块 */
.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.service-card{background:#fff;border-radius:12px;padding:30px 24px;text-align:center;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:all .3s;border:1px solid rgba(13,124,62,.08)}
.service-card:hover{transform:translateY(-4px);box-shadow:0 8px 30px rgba(13,124,62,.12);border-color:rgba(201,168,76,.3)}
.service-icon{width:64px;height:64px;margin:0 auto 16px;background:linear-gradient(135deg,#0d7c3e,#0a5a2d);border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:1.8rem}
.service-card h3{font-size:1.1rem;color:#0a2e1a;margin-bottom:10px}
.service-card p{font-size:.9rem;color:#5a6b5e;line-height:1.6}

/* 社区模块 */
.community-features{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.community-card{background:#fff;border-radius:12px;padding:24px 18px;text-align:center;box-shadow:0 3px 15px rgba(0,0,0,.05);transition:all .3s;border:1px solid rgba(13,124,62,.06)}
.community-card:hover{transform:translateY(-3px);border-color:#c9a84c}
.community-icon{font-size:2rem;margin-bottom:12px}
.community-card h3{font-size:1rem;color:#0a2e1a;margin-bottom:8px}
.community-card p{font-size:.85rem;color:#5a6b5e;line-height:1.5}

/* AI赋能 */
.ai-section{background:linear-gradient(135deg,#0a2e1a 0%,#0d5c2e 100%);color:#e8e0cc}
.ai-section .section-title h2{color:#c9a84c}
.ai-section .section-title p{color:#a8b5aa}
.ai-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:center}
.ai-img{border-radius:12px;overflow:hidden;box-shadow:0 8px 30px rgba(0,0,0,.3)}
.ai-content h3{font-size:1.3rem;color:#c9a84c;margin-bottom:12px}
.ai-content p{color:#c4d0c6;line-height:1.8;margin-bottom:16px}
.ai-features{list-style:none}
.ai-features li{padding:8px 0;color:#a8b5aa;font-size:.95rem}
.ai-features li::before{content:'✦';color:#c9a84c;margin-right:8px}

/* 专家团队 */
.experts-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.expert-card{background:#fff;border-radius:12px;padding:24px;text-align:center;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:all .3s}
.expert-card:hover{transform:translateY(-4px);box-shadow:0 8px 30px rgba(0,0,0,.12)}
.expert-avatar{width:100px;height:100px;border-radius:50%;margin:0 auto 14px;object-fit:cover;border:3px solid #c9a84c}
.expert-card h3{font-size:1.05rem;color:#0a2e1a;margin-bottom:4px}
.expert-role{color:#0d7c3e;font-size:.88rem;margin-bottom:10px}
.expert-desc{font-size:.85rem;color:#5a6b5e;line-height:1.5;margin-bottom:14px}
.expert-btns{display:flex;gap:8px;justify-content:center}
.expert-btns a{padding:6px 14px;border-radius:20px;font-size:.82rem;border:1px solid #0d7c3e;color:#0d7c3e;transition:all .3s}
.expert-btns a:hover{background:#0d7c3e;color:#fff}

/* 品牌墙 */
.brand-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;padding:20px 0}
.brand-item{padding:16px 28px;background:#fff;border-radius:8px;box-shadow:0 2px 10px rgba(0,0,0,.05);font-size:1rem;color:#5a6b5e;font-weight:600;transition:all .3s;border:1px solid rgba(13,124,62,.08)}
.brand-item:hover{border-color:#c9a84c;color:#0a2e1a;box-shadow:0 4px 15px rgba(201,168,76,.15)}

/* How-To步骤 */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
.howto-step{background:#fff;border-radius:12px;padding:30px 20px;text-align:center;box-shadow:0 4px 20px rgba(0,0,0,.06);position:relative}
.step-number{width:48px;height:48px;background:linear-gradient(135deg,#0d7c3e,#c9a84c);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.3rem;font-weight:700;margin:0 auto 16px}
.howto-step h3{font-size:1rem;color:#0a2e1a;margin-bottom:8px}
.howto-step p{font-size:.88rem;color:#5a6b5e;line-height:1.5}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:10px;margin-bottom:12px;box-shadow:0 2px 10px rgba(0,0,0,.04);overflow:hidden;border:1px solid rgba(13,124,62,.06)}
.faq-question{display:flex;justify-content:space-between;align-items:center;padding:18px 24px;cursor:pointer;font-weight:600;color:#0a2e1a;font-size:1rem;transition:background .3s}
.faq-question:hover{background:#eef5e9}
.faq-arrow{transition:transform .3s;color:#0d7c3e;font-size:1.2rem}
.faq-item.open .faq-arrow{transform:rotate(180deg)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:all .4s;color:#5a6b5e;font-size:.92rem;line-height:1.7}
.faq-item.open .faq-answer{padding:0 24px 18px;max-height:500px}

/* 用户评价 */
.reviews-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.review-card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 4px 20px rgba(0,0,0,.06);border-left:4px solid #0d7c3e}
.review-header{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.review-avatar{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,#0d7c3e,#c9a84c);display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.2rem;font-weight:700}
.review-name{font-weight:600;color:#0a2e1a;font-size:.95rem}
.review-date{font-size:.82rem;color:#7a8c7e}
.review-stars{color:#c9a84c;font-size:.9rem;margin-bottom:8px}
.review-text{font-size:.92rem;color:#5a6b5e;line-height:1.6}

/* 联系模块 */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.contact-card{background:#fff;border-radius:12px;padding:28px;box-shadow:0 4px 20px rgba(0,0,0,.06)}
.contact-card h3{font-size:1.15rem;color:#0a2e1a;margin-bottom:16px;padding-bottom:10px;border-bottom:2px solid #eef5e9}
.contact-item{display:flex;align-items:flex-start;gap:10px;margin-bottom:12px;font-size:.92rem;color:#5a6b5e}
.contact-icon{color:#0d7c3e;font-size:1.1rem;flex-shrink:0;margin-top:2px}

/* 分享栏 */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;padding:20px 0}
.share-btn{padding:10px 22px;border-radius:25px;border:none;cursor:pointer;font-size:.9rem;font-weight:600;transition:all .3s;display:flex;align-items:center;gap:6px}
.share-wechat{background:#07c160;color:#fff}
.share-weibo{background:#e6162d;color:#fff}
.share-douyin{background:#161823;color:#fff}
.share-bilibili{background:#00a1d6;color:#fff}
.share-btn:hover{transform:translateY(-2px);opacity:.9}

/* 页脚 */
.site-footer{background:linear-gradient(135deg,#0a2e1a 0%,#071f12 100%);color:#a8b5aa;padding:50px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;margin-bottom:40px}
.footer-brand{margin-bottom:16px}
.footer-brand img{width:48px;height:48px;border-radius:8px;margin-bottom:10px}
.footer-brand p{font-size:.9rem;line-height:1.6;color:#7a8c7e}
.footer-col h4{color:#c9a84c;font-size:1rem;margin-bottom:14px}
.footer-col a{display:block;color:#7a8c7e;font-size:.88rem;padding:4px 0;transition:color .3s}
.footer-col a:hover{color:#c9a84c}
.footer-qrcodes{display:flex;gap:16px;margin-top:16px}
.footer-qrcode{width:100px;border-radius:8px}
.footer-bottom{border-top:1px solid rgba(201,168,76,.1);padding:20px 0;text-align:center;font-size:.85rem;color:#5a6b5e}
.footer-bottom a{color:#7a8c7e}
.social-links{display:flex;gap:12px;margin-top:12px}
.social-links a{width:36px;height:36px;border-radius:50%;background:rgba(201,168,76,.15);display:flex;align-items:center;justify-content:center;color:#c9a84c;font-size:.9rem;transition:all .3s}
.social-links a:hover{background:#c9a84c;color:#0a2e1a}

/* 回到顶部 */
.back-to-top{position:fixed;bottom:30px;right:30px;width:48px;height:48px;background:linear-gradient(135deg,#0d7c3e,#c9a84c);color:#fff;border:none;border-radius:50%;font-size:1.3rem;cursor:pointer;opacity:0;visibility:hidden;transition:all .3s;box-shadow:0 4px 15px rgba(0,0,0,.2);z-index:999}
.back-to-top.visible{opacity:1;visibility:visible}
.back-to-top:hover{transform:translateY(-3px)}

/* 内页头部 */
.page-header{background:linear-gradient(135deg,#0a2e1a 0%,#0d5c2e 100%);padding:50px 0;text-align:center}
.page-header h1{color:#c9a84c;font-size:2.2rem;margin-bottom:10px}
.page-header p{color:#a8b5aa;font-size:1rem}
.content-block{padding:40px 0}
.content-block h2{color:#0a2e1a;font-size:1.5rem;margin-bottom:16px}
.content-block p{color:#5a6b5e;line-height:1.8;margin-bottom:16px}

/* 响应式 */
@media(max-width:1024px){
.video-grid,.services-grid{grid-template-columns:repeat(2,1fr)}
.experts-grid,.howto-steps,.community-features{grid-template-columns:repeat(2,1fr)}
.footer-grid{grid-template-columns:1fr 1fr}
.ai-grid{grid-template-columns:1fr}
.contact-grid{grid-template-columns:1fr}
}
@media(max-width:768px){
.header-inner{flex-wrap:wrap}
.main-nav{display:none;flex-direction:column;width:100%;padding:10px 0}
.main-nav.open{display:flex}
.mobile-menu-btn{display:block}
.hero-content h1{font-size:1.8rem}
.hero-content h1 .brand-hl{font-size:2rem}
.hero-content p{font-size:1rem}
.video-grid{grid-template-columns:1fr}
.services-grid{grid-template-columns:1fr}
.experts-grid{grid-template-columns:1fr 1fr}
.community-features{grid-template-columns:1fr 1fr}
.howto-steps{grid-template-columns:1fr 1fr}
.reviews-grid{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr}
.section-title h2{font-size:1.5rem}
section{padding:40px 0}
}
@media(max-width:480px){
.experts-grid,.howto-steps,.community-features{grid-template-columns:1fr}
.hero-btns{flex-direction:column;align-items:center}
}