/* ============================================
   糖心vlog 全站样式表 - 原创设计
   主色调：金色 #D4A017 / 深色 #1A1A2E / 暖色 #F5E6C8
   ============================================ */

/* === 基础重置 === */
*,*::before,*::after{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:#FDFAF3;line-height:1.7;overflow-x:hidden}
a{text-decoration:none;color:inherit;transition:color .3s}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.3}

/* === 配色变量 === */
:root{
  --gold:#D4A017;
  --gold-light:#F0D060;
  --gold-dark:#A67C00;
  --dark:#1A1A2E;
  --dark-blue:#16213E;
  --cream:#FDFAF3;
  --warm:#F5E6C8;
  --text:#2D2D2D;
  --text-light:#6B6B6B;
  --white:#FFFFFF;
  --shadow:0 4px 20px rgba(0,0,0,.08);
  --shadow-gold:0 4px 24px rgba(212,160,23,.2);
  --radius:12px;
  --radius-lg:20px;
}

/* === 头部导航 === */
.site-header{position:sticky;top:0;z-index:1000;background:var(--dark);backdrop-filter:blur(12px);border-bottom:2px solid var(--gold);transition:all .3s}
.header-inner{max-width:1320px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:68px}
.logo-wrap{display:flex;align-items:center;gap:10px}
.logo-wrap img{height:42px;width:auto}
.logo-wrap .brand-name{font-size:1.4rem;font-weight:800;color:var(--gold);letter-spacing:1px}
.main-nav{display:flex;gap:6px}
.main-nav a{color:var(--white);font-size:.95rem;padding:8px 16px;border-radius:8px;transition:all .3s;font-weight:500}
.main-nav a:hover,.main-nav a.active{background:var(--gold);color:var(--dark)}
.mobile-menu-btn{display:none;background:none;border:none;color:var(--gold);font-size:1.6rem;cursor:pointer}

/* === 搜索框 === */
.search-bar{background:linear-gradient(135deg,var(--dark-blue),var(--dark));padding:14px 24px}
.search-inner{max-width:680px;margin:0 auto;display:flex;gap:10px}
.search-inner input{flex:1;padding:10px 18px;border:2px solid var(--gold);border-radius:25px;background:rgba(255,255,255,.08);color:var(--white);font-size:.95rem;outline:none;transition:border-color .3s}
.search-inner input::placeholder{color:rgba(255,255,255,.5)}
.search-inner input:focus{border-color:var(--gold-light);background:rgba(255,255,255,.12)}
.search-inner button{padding:10px 28px;background:var(--gold);color:var(--dark);border:none;border-radius:25px;font-weight:700;cursor:pointer;transition:all .3s;font-size:.95rem}
.search-inner button:hover{background:var(--gold-light);transform:scale(1.03)}

/* === Banner区域 === */
.hero-banner{position:relative;min-height:520px;display:flex;align-items:center;overflow:hidden;background:var(--dark)}
.hero-banner .banner-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.7}
.hero-banner .banner-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(26,26,46,.85) 0%,rgba(22,33,62,.6) 50%,rgba(212,160,23,.15) 100%)}
.hero-content{position:relative;z-index:2;max-width:1320px;margin:0 auto;padding:60px 24px;color:var(--white)}
.hero-content h1{font-size:3rem;margin-bottom:16px;text-shadow:0 2px 12px rgba(0,0,0,.4)}
.hero-content h1 .highlight{color:var(--gold);display:inline}
.hero-content .subtitle{font-size:1.25rem;color:var(--warm);margin-bottom:24px;max-width:640px}
.hero-content .hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.hero-content .hero-tags span{background:rgba(212,160,23,.2);border:1px solid var(--gold);color:var(--gold-light);padding:6px 16px;border-radius:20px;font-size:.85rem}
.hero-content .hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.btn-gold{display:inline-flex;align-items:center;gap:8px;padding:12px 32px;background:linear-gradient(135deg,var(--gold),var(--gold-dark));color:var(--dark);font-weight:700;border-radius:30px;border:none;cursor:pointer;transition:all .3s;font-size:1rem}
.btn-gold:hover{transform:translateY(-2px);box-shadow:var(--shadow-gold)}
.btn-outline{display:inline-flex;align-items:center;gap:8px;padding:12px 32px;background:transparent;color:var(--gold);font-weight:700;border-radius:30px;border:2px solid var(--gold);cursor:pointer;transition:all .3s;font-size:1rem}
.btn-outline:hover{background:var(--gold);color:var(--dark)}

/* === 通用容器 === */
.container{max-width:1320px;margin:0 auto;padding:0 24px}
.section{padding:64px 0}
.section-dark{background:var(--dark);color:var(--white)}
.section-warm{background:var(--warm)}
.section-cream{background:var(--cream)}
.section-title{text-align:center;margin-bottom:48px}
.section-title h2{font-size:2rem;color:var(--dark);margin-bottom:10px}
.section-dark .section-title h2{color:var(--gold)}
.section-title .title-line{width:60px;height:4px;background:var(--gold);margin:12px auto 0;border-radius:2px}
.section-title p{color:var(--text-light);margin-top:10px;font-size:1rem}
.section-dark .section-title p{color:rgba(255,255,255,.7)}

/* === 视频卡片网格 === */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:24px}
.video-card{background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:all .35s;cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 36px rgba(0,0,0,.12)}
.video-card .thumb-wrap{position:relative;padding-top:56.25%;overflow:hidden;background:#000}
.video-card .thumb-wrap img,.video-card .thumb-wrap video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .thumb-wrap img,.video-card:hover .thumb-wrap video{transform:scale(1.05)}
.video-card .play-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.35);opacity:0;transition:opacity .3s}
.video-card:hover .play-overlay{opacity:1}
.play-overlay .play-btn{width:60px;height:60px;background:var(--gold);border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 16px rgba(212,160,23,.4);transition:transform .3s}
.play-overlay .play-btn::after{content:'';display:block;width:0;height:0;border-style:solid;border-width:12px 0 12px 20px;border-color:transparent transparent transparent var(--dark);margin-left:4px}
.video-card:hover .play-overlay .play-btn{transform:scale(1.1)}
.video-card .card-body{padding:16px 18px}
.video-card .card-body h3{font-size:1rem;color:var(--text);margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-card .card-body p{font-size:.85rem;color:var(--text-light);margin-bottom:10px;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:.8rem;color:var(--text-light);border-top:1px solid #f0f0f0;padding-top:10px}
.video-card .card-meta span{display:flex;align-items:center;gap:4px}
.video-card .duration-tag{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.75);color:var(--white);padding:2px 8px;border-radius:4px;font-size:.75rem}

/* === 模块卡片（传媒/AI/社区等） === */
.module-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.module-card{background:var(--white);border-radius:var(--radius);padding:28px 24px;box-shadow:var(--shadow);transition:all .35s;border-top:4px solid transparent}
.module-card:hover{transform:translateY(-4px);border-top-color:var(--gold);box-shadow:var(--shadow-gold)}
.module-card .card-icon{width:56px;height:56px;background:linear-gradient(135deg,var(--gold),var(--gold-dark));border-radius:14px;display:flex;align-items:center;justify-content:center;margin-bottom:16px;font-size:1.6rem;color:var(--dark)}
.module-card h3{font-size:1.15rem;margin-bottom:8px;color:var(--text)}
.module-card p{font-size:.9rem;color:var(--text-light);line-height:1.6}
.section-dark .module-card{background:var(--dark-blue);border-top-color:var(--gold)}
.section-dark .module-card h3{color:var(--gold-light)}
.section-dark .module-card p{color:rgba(255,255,255,.7)}

/* === 专家展示 === */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.expert-card{background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);text-align:center;transition:all .35s}
.expert-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-gold)}
.expert-card .expert-img{width:100%;height:200px;object-fit:cover}
.expert-card .expert-info{padding:20px}
.expert-card h4{font-size:1.05rem;color:var(--text);margin-bottom:4px}
.expert-card .expert-title{font-size:.85rem;color:var(--gold);margin-bottom:10px}
.expert-card p{font-size:.85rem;color:var(--text-light);margin-bottom:12px}
.expert-card .expert-links{display:flex;justify-content:center;gap:12px}
.expert-card .expert-links a{padding:6px 14px;border:1px solid var(--gold);color:var(--gold);border-radius:20px;font-size:.8rem;transition:all .3s}
.expert-card .expert-links a:hover{background:var(--gold);color:var(--dark)}

/* === FAQ === */
.faq-list{max-width:860px;margin:0 auto}
.faq-item{background:var(--white);border-radius:var(--radius);margin-bottom:12px;box-shadow:var(--shadow);overflow:hidden}
.faq-item .faq-q{padding:18px 24px;font-weight:700;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-size:1rem;color:var(--text);transition:background .3s}
.faq-item .faq-q:hover{background:var(--warm)}
.faq-item .faq-q::after{content:'+';font-size:1.4rem;color:var(--gold);transition:transform .3s;font-weight:400}
.faq-item.active .faq-q::after{transform:rotate(45deg)}
.faq-item .faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 24px}
.faq-item.active .faq-a{max-height:300px;padding:0 24px 18px}
.faq-item .faq-a p{font-size:.9rem;color:var(--text-light);line-height:1.7}

/* === 用户评论 === */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:24px}
.review-card{background:var(--white);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);border-left:4px solid var(--gold)}
.review-card .review-header{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.review-card .avatar{width:44px;height:44px;border-radius:50%;background:var(--gold);display:flex;align-items:center;justify-content:center;color:var(--dark);font-weight:700;font-size:1.1rem}
.review-card .reviewer-name{font-weight:700;font-size:.95rem}
.review-card .review-date{font-size:.8rem;color:var(--text-light)}
.review-card .stars{color:var(--gold);font-size:.9rem;margin-bottom:8px;letter-spacing:2px}
.review-card .review-text{font-size:.9rem;color:var(--text-light);line-height:1.7}

/* === 合作品牌墙 === */
.partner-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:32px;align-items:center}
.partner-wall .partner-item{width:120px;height:60px;background:var(--white);border-radius:8px;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow);padding:10px;opacity:.7;transition:all .3s}
.partner-wall .partner-item:hover{opacity:1;transform:scale(1.08)}

/* === How-To指南 === */
.howto-steps{max-width:860px;margin:0 auto;display:flex;flex-direction:column;gap:20px}
.howto-step{display:flex;gap:20px;align-items:flex-start;background:var(--white);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.howto-step .step-num{width:48px;height:48px;flex-shrink:0;background:var(--gold);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.2rem;font-weight:800;color:var(--dark)}
.howto-step .step-content h4{font-size:1.05rem;margin-bottom:6px}
.howto-step .step-content p{font-size:.9rem;color:var(--text-light)}

/* === 联系我们 === */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.contact-card{background:var(--white);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);text-align:center}
.contact-card h4{font-size:1.1rem;color:var(--gold);margin-bottom:12px}
.contact-card p{font-size:.9rem;color:var(--text-light);margin-bottom:6px}
.contact-card img{max-width:160px;margin:12px auto 0;border-radius:8px}

/* === 社交分享 === */
.share-bar{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;padding:20px 0}
.share-btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border-radius:25px;font-size:.9rem;font-weight:600;transition:all .3s;border:2px solid}
.share-btn.wechat{border-color:#07C160;color:#07C160}
.share-btn.weibo{border-color:#E6162D;color:#E6162D}
.share-btn.douyin{border-color:#000;color:#000}
.share-btn.bilibili{border-color:#00A1D6;color:#00A1D6}
.share-btn:hover{transform:translateY(-2px);opacity:.8}

/* === 页脚 === */
.site-footer{background:var(--dark);color:rgba(255,255,255,.7);padding:48px 0 0}
.footer-inner{max-width:1320px;margin:0 auto;padding:0 24px}
.footer-top{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:32px;padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-col h4{color:var(--gold);font-size:1rem;margin-bottom:14px}
.footer-col p,.footer-col a{font-size:.88rem;color:rgba(255,255,255,.6);display:block;margin-bottom:8px;transition:color .3s}
.footer-col a:hover{color:var(--gold)}
.footer-col .footer-logo{height:36px;margin-bottom:12px}
.footer-qr{display:flex;gap:16px;margin-top:10px}
.footer-qr img{width:100px;border-radius:8px}
.footer-bottom{text-align:center;padding:20px 0;font-size:.82rem;color:rgba(255,255,255,.4)}

/* === 面包屑 === */
.breadcrumb{padding:14px 0;font-size:.88rem;color:var(--text-light)}
.breadcrumb a{color:var(--gold);transition:color .3s}
.breadcrumb a:hover{color:var(--gold-dark)}
.breadcrumb span{margin:0 8px;color:#ccc}

/* === 视频播放页 === */
.video-player-wrap{position:relative;padding-top:56.25%;background:#000;border-radius:var(--radius);overflow:hidden;margin-bottom:24px}
.video-player-wrap video,.video-player-wrap iframe{position:absolute;inset:0;width:100%;height:100%}
.video-detail{max-width:960px;margin:0 auto}
.video-detail h1{font-size:1.6rem;margin-bottom:12px}
.video-detail .video-meta{display:flex;gap:20px;font-size:.9rem;color:var(--text-light);margin-bottom:20px;flex-wrap:wrap}
.video-detail .video-desc{font-size:.95rem;color:var(--text);line-height:1.8;margin-bottom:24px}

/* === 内页通用 === */
.page-hero{background:var(--dark);padding:48px 0;text-align:center;color:var(--white)}
.page-hero h1{font-size:2.2rem;color:var(--gold);margin-bottom:10px}
.page-hero p{font-size:1.05rem;color:rgba(255,255,255,.7);max-width:640px;margin:0 auto}

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

/* === 懒加载 === */
.lazy{opacity:0;transition:opacity .5s}
.lazy.loaded{opacity:1}

/* === 响应式 === */
@media(max-width:1024px){
  .hero-content h1{font-size:2.2rem}
  .video-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}
}
@media(max-width:768px){
  .header-inner{height:58px}
  .main-nav{display:none;position:absolute;top:58px;left:0;right:0;background:var(--dark);flex-direction:column;padding:16px;border-top:1px solid rgba(255,255,255,.1)}
  .main-nav.open{display:flex}
  .mobile-menu-btn{display:block}
  .hero-banner{min-height:400px}
  .hero-content h1{font-size:1.8rem}
  .hero-content .subtitle{font-size:1rem}
  .section{padding:40px 0}
  .section-title h2{font-size:1.6rem}
  .video-grid{grid-template-columns:1fr}
  .module-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr}
  .video-card .thumb-wrap{cursor:pointer}
  .video-card .play-overlay{opacity:.7}
}
@media(max-width:480px){
  .hero-content h1{font-size:1.5rem}
  .btn-gold,.btn-outline{padding:10px 22px;font-size:.9rem}
  .search-inner{flex-direction:column}
  .search-inner button{width:100%}
}