/* ============================================================
   大象传媒视频社区 - 迈巴赫黑金殿堂主题
   Design: Black & Champagne Gold, Diamond Quilting Motif
   ============================================================ */

/* --- Reset & Base --- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;background:#0A0A0A;color:#F5F0E8;line-height:1.7;overflow-x:hidden}
a{color:#C9A96E;text-decoration:none;transition:color .2s}
a:hover{color:#E8C97A}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{font-family:"Playfair Display","Noto Serif SC","STSong",serif;color:#F5F0E8;line-height:1.3;letter-spacing:1px}
h1{font-size:2.8rem;margin-bottom:1rem}
h2{font-size:2rem;margin-bottom:.8rem}
h3{font-size:1.5rem;margin-bottom:.6rem}
h4{font-size:1.2rem;margin-bottom:.5rem}
p{margin-bottom:1rem;color:#BDB5A8}

/* --- Diamond Quilting Pattern (CSS) --- */
.diamond-bg{
  background-image:
    linear-gradient(45deg, rgba(201,169,110,.04) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(201,169,110,.04) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(201,169,110,.04) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(201,169,110,.04) 75%);
  background-size:40px 40px;
  background-position:0 0,0 20px,20px -20px,-20px 0;
}

/* --- Container --- */
.container{width:100%;max-width:1280px;margin:0 auto;padding:0 1.5rem}
@media(max-width:768px){.container{padding:0 1rem}}

/* --- Gold Separator --- */
.gold-line{height:1px;background:linear-gradient(90deg,transparent,#C9A96E,transparent);margin:3rem 0;border:none}

/* --- Header / Navigation --- */
.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(10,10,10,.92);backdrop-filter:blur(12px);border-bottom:1px solid rgba(201,169,110,.15);transition:background .3s}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo{display:flex;align-items:center;gap:.6rem}
.logo img{height:42px;width:auto}
.logo span{font-family:"Playfair Display","Noto Serif SC",serif;font-size:1.6rem;color:#C9A96E;font-weight:700;letter-spacing:2px}
.main-nav ul{display:flex;gap:1.8rem;align-items:center}
.main-nav a{color:#F5F0E8;font-size:.9rem;padding:.4rem 0;position:relative;transition:color .2s}
.main-nav a::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:#C9A96E;transition:width .25s ease-out}
.main-nav a:hover::after,.main-nav a.active::after{width:100%}
.main-nav a:hover{color:#C9A96E}

/* --- Search Bar --- */
.search-bar{margin:0;padding:12px 0;background:rgba(20,20,20,.8);border-bottom:1px solid rgba(201,169,110,.1)}
.search-bar form{display:flex;max-width:500px;margin:0 auto}
.search-bar input{flex:1;padding:10px 16px;background:#1A1A1A;border:1px solid rgba(201,169,110,.3);border-radius:4px 0 0 4px;color:#F5F0E8;font-size:.9rem;outline:none;transition:border-color .2s}
.search-bar input:focus{border-color:#C9A96E}
.search-bar button{padding:10px 20px;background:linear-gradient(135deg,#C9A96E,#8B7355);border:none;color:#0A0A0A;font-weight:600;border-radius:0 4px 4px 0;cursor:pointer;transition:opacity .2s}
.search-bar button:hover{opacity:.85}

/* --- Hero Banner --- */
.hero{position:relative;width:100%;min-height:520px;display:flex;align-items:center;overflow:hidden;margin-top:70px}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;z-index:0}
.hero-bg::after{content:'';position:absolute;inset:0;background:linear-gradient(to right,rgba(10,10,10,.88) 0%,rgba(10,10,10,.5) 60%,rgba(10,10,10,.3) 100%)}
.hero-content{position:relative;z-index:1;max-width:640px;padding:4rem 0}
.hero-content h1{font-size:3rem;margin-bottom:1rem}
.hero-content h1 span{color:#C9A96E}
.hero-content p{font-size:1.1rem;color:#BDB5A8;margin-bottom:1.5rem}
.hero-tags{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:1.5rem}
.hero-tags span{background:rgba(201,169,110,.12);border:1px solid rgba(201,169,110,.3);padding:4px 12px;border-radius:3px;font-size:.8rem;color:#C9A96E}
.btn-gold{display:inline-block;padding:12px 32px;background:linear-gradient(135deg,#C9A96E,#8B7355);color:#0A0A0A;font-weight:700;border-radius:4px;transition:transform .15s,box-shadow .2s;border:none;cursor:pointer;font-size:.95rem}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(201,169,110,.25);color:#0A0A0A}
.btn-gold:active{transform:scale(.97)}

/* --- Section Titles --- */
.section-title{text-align:center;margin-bottom:2.5rem}
.section-title h2{display:inline-block;position:relative;padding-bottom:.8rem}
.section-title h2::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:60px;height:2px;background:linear-gradient(90deg,#C9A96E,#8B7355)}
.section-title p{color:#9A9088;margin-top:.5rem;font-size:.95rem}

/* --- Video Cards --- */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.5rem}
.video-card{position:relative;background:#141414;border-radius:6px;overflow:hidden;border:1px solid rgba(201,169,110,.1);transition:transform .25s ease-out,border-color .25s}
.video-card:hover{transform:translateY(-4px);border-color:rgba(201,169,110,.4)}
.video-card .thumb{position:relative;aspect-ratio:16/9;overflow:hidden}
.video-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.video-card:hover .thumb img{transform:scale(1.03)}
.video-card .play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%) scale(.8);width:56px;height:56px;background:rgba(201,169,110,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .25s,transform .25s}
.video-card:hover .play-btn{opacity:1;transform:translate(-50%,-50%) scale(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 #0A0A0A;margin-left:4px}
.video-card .card-body{padding:1rem 1.2rem}
.video-card .card-body h4{font-size:1rem;margin-bottom:.4rem;font-family:"Noto Sans SC",sans-serif;font-weight:600}
.video-card .meta{display:flex;gap:1rem;font-size:.8rem;color:#9A9088}
.video-card .meta span{display:flex;align-items:center;gap:4px}
.video-card .duration{position:absolute;bottom:8px;right:8px;background:rgba(10,10,10,.8);padding:2px 8px;border-radius:3px;font-size:.75rem;color:#F5F0E8}

/* --- Sections --- */
section{padding:4rem 0}
.section-dark{background:#0A0A0A}
.section-alt{background:#0F0F0F}

/* --- Expert Cards --- */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1.5rem}
.expert-card{background:#141414;border:1px solid rgba(201,169,110,.1);border-radius:6px;padding:1.5rem;text-align:center;transition:border-color .25s}
.expert-card:hover{border-color:rgba(201,169,110,.4)}
.expert-card img{width:100px;height:100px;border-radius:50%;object-fit:cover;margin:0 auto 1rem;border:2px solid #C9A96E}
.expert-card h4{margin-bottom:.3rem}
.expert-card .role{color:#C9A96E;font-size:.85rem;margin-bottom:.5rem}
.expert-card p{font-size:.85rem;color:#9A9088}
.expert-card .btn-sm{display:inline-block;margin-top:.8rem;padding:6px 16px;border:1px solid #C9A96E;color:#C9A96E;border-radius:3px;font-size:.8rem;transition:background .2s,color .2s}
.expert-card .btn-sm:hover{background:#C9A96E;color:#0A0A0A}

/* --- FAQ --- */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border-bottom:1px solid rgba(201,169,110,.15);padding:1.2rem 0}
.faq-item summary{cursor:pointer;font-weight:600;color:#F5F0E8;font-size:1rem;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq-item summary::after{content:'+';font-size:1.4rem;color:#C9A96E;transition:transform .2s}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item p{margin-top:.8rem;color:#BDB5A8;font-size:.9rem;padding-left:.5rem}

/* --- Reviews --- */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem}
.review-card{background:#141414;border:1px solid rgba(201,169,110,.1);border-radius:6px;padding:1.5rem}
.review-card .stars{color:#C9A96E;margin-bottom:.5rem;font-size:1.1rem}
.review-card blockquote{font-style:italic;color:#BDB5A8;font-size:.9rem;margin-bottom:.8rem;line-height:1.6}
.review-card .reviewer{font-size:.8rem;color:#9A9088}

/* --- Contact / Info --- */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:2rem}
.contact-box{background:#141414;border:1px solid rgba(201,169,110,.1);border-radius:6px;padding:1.5rem}
.contact-box h4{color:#C9A96E;margin-bottom:.8rem}
.contact-box p{font-size:.9rem;color:#BDB5A8}

/* --- Footer --- */
.site-footer{background:#050505;border-top:1px solid rgba(201,169,110,.15);padding:3rem 0 1.5rem}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:2rem;margin-bottom:2rem}
.footer-col h5{color:#C9A96E;margin-bottom:1rem;font-size:.95rem}
.footer-col a{display:block;color:#9A9088;font-size:.85rem;margin-bottom:.5rem;transition:color .2s}
.footer-col a:hover{color:#C9A96E}
.footer-bottom{text-align:center;padding-top:1.5rem;border-top:1px solid rgba(201,169,110,.1);font-size:.8rem;color:#9A9088}
.footer-qr{display:flex;gap:1.5rem;justify-content:center;margin:1.5rem 0}
.footer-qr div{text-align:center}
.footer-qr img{width:100px;height:100px;border:1px solid rgba(201,169,110,.2);border-radius:4px}
.footer-qr span{display:block;margin-top:.4rem;font-size:.75rem;color:#9A9088}

/* --- Share Buttons --- */
.share-bar{display:flex;gap:.8rem;flex-wrap:wrap;margin-top:1rem}
.share-bar a{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;background:#1A1A1A;border:1px solid rgba(201,169,110,.2);border-radius:3px;font-size:.8rem;color:#BDB5A8;transition:border-color .2s,color .2s}
.share-bar a:hover{border-color:#C9A96E;color:#C9A96E}

/* --- Brand Wall --- */
.brand-wall{display:flex;flex-wrap:wrap;gap:2rem;justify-content:center;align-items:center;padding:2rem 0}
.brand-wall span{font-size:1.1rem;color:#9A9088;font-weight:600;letter-spacing:1px;padding:1rem 1.5rem;border:1px solid rgba(201,169,110,.15);border-radius:4px}

/* --- How-To Guide --- */
.howto-steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.5rem}
.howto-step{background:#141414;border:1px solid rgba(201,169,110,.1);border-radius:6px;padding:1.5rem;text-align:center}
.howto-step .step-num{display:inline-flex;width:40px;height:40px;align-items:center;justify-content:center;background:linear-gradient(135deg,#C9A96E,#8B7355);color:#0A0A0A;font-weight:700;border-radius:50%;margin-bottom:1rem;font-size:1.1rem}
.howto-step h4{margin-bottom:.5rem}
.howto-step p{font-size:.85rem;color:#9A9088}

/* --- Mobile Nav Toggle --- */
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:.5rem}
.nav-toggle span{display:block;width:24px;height:2px;background:#C9A96E;margin:5px 0;transition:transform .2s}
@media(max-width:900px){
  .nav-toggle{display:block}
  .main-nav{position:absolute;top:70px;left:0;width:100%;background:rgba(10,10,10,.98);padding:1rem 0;display:none}
  .main-nav.open{display:block}
  .main-nav ul{flex-direction:column;align-items:flex-start;padding:0 1.5rem;gap:1rem}
  .hero-content h1{font-size:2rem}
  .hero{min-height:400px}
  .video-grid{grid-template-columns:1fr}
}

/* --- Animations --- */
@media(prefers-reduced-motion:no-preference){
  .fade-in{opacity:0;transform:translateY(20px);transition:opacity .5s ease-out,transform .5s ease-out}
  .fade-in.visible{opacity:1;transform:translateY(0)}
}

/* --- JSON-LD hidden --- */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}

/* --- Breadcrumb --- */
.breadcrumb{padding:1rem 0;font-size:.85rem}
.breadcrumb a{color:#9A9088}
.breadcrumb a:hover{color:#C9A96E}
.breadcrumb span{color:#C9A96E}

/* --- Inner Page Hero --- */
.inner-hero{margin-top:70px;padding:3rem 0;background:#0F0F0F;border-bottom:1px solid rgba(201,169,110,.1)}
.inner-hero h1{font-size:2.2rem}