/* ============================================
   偷拍 - 原创星河主题样式表
   配色：星河紫 #6C5CE7 / 极光青 #00CEC9 / 霓虹粉 #FD79A8
   ============================================ */

/* === Reset & Base === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;background:#0D1117;color:#E6EDF3;line-height:1.7;overflow-x:hidden}
a{color:#00CEC9;text-decoration:none;transition:color .3s}
a:hover{color:#6C5CE7}
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}

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

/* === Header === */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(13,17,23,.92);backdrop-filter:blur(12px);border-bottom:1px solid #21262D;transition:background .3s}
.header-inner{display:flex;align-items:center;justify-content:space-between;max-width:1200px;margin:0 auto;padding:0 20px;height:68px}
.site-logo img{height:44px;width:auto}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{padding:8px 14px;border-radius:8px;font-size:14px;color:#8B949E;font-weight:500;transition:all .3s}
.main-nav a:hover,.main-nav a.active{color:#E6EDF3;background:rgba(108,92,231,.15)}
.nav-toggle{display:none;background:none;border:none;color:#E6EDF3;font-size:24px;cursor:pointer;padding:8px}
.header-search{position:relative;margin-left:12px}
.header-search input{width:180px;padding:7px 36px 7px 14px;border-radius:20px;border:1px solid #21262D;background:#161B22;color:#E6EDF3;font-size:13px;transition:all .3s}
.header-search input:focus{outline:none;border-color:#6C5CE7;width:240px}
.header-search input::placeholder{color:#484F58}
.search-btn{position:absolute;right:4px;top:50%;transform:translateY(-50%);background:none;border:none;color:#8B949E;cursor:pointer;padding:6px;font-size:16px}

/* === Hero Section === */
.hero-section{position:relative;min-height:520px;display:flex;align-items:center;justify-content:center;text-align:center;margin-top:68px;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;filter:brightness(.45)}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(13,17,23,.3) 0%,rgba(13,17,23,.85) 100%);z-index:1}
.hero-content{position:relative;z-index:2;max-width:720px;padding:60px 20px}
.hero-content h1{font-size:42px;margin-bottom:16px;background:linear-gradient(135deg,#6C5CE7,#00CEC9);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-content .hero-desc{font-size:17px;color:#8B949E;margin-bottom:28px;line-height:1.8}
.hero-cta{display:inline-flex;gap:14px;flex-wrap:wrap;justify-content:center}
.btn-primary{display:inline-block;padding:12px 32px;background:linear-gradient(135deg,#6C5CE7,#00CEC9);color:#fff;border-radius:30px;font-weight:600;font-size:15px;transition:transform .3s,box-shadow .3s;border:none;cursor:pointer}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(108,92,231,.4);color:#fff}
.btn-outline{display:inline-block;padding:12px 32px;border:2px solid #6C5CE7;color:#6C5CE7;border-radius:30px;font-weight:600;font-size:15px;transition:all .3s;background:transparent;cursor:pointer}
.btn-outline:hover{background:#6C5CE7;color:#fff}

/* === Stats Bar === */
.stats-bar{background:#161B22;border-top:1px solid #21262D;border-bottom:1px solid #21262D;padding:28px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat-item .stat-num{font-size:32px;font-weight:800;background:linear-gradient(135deg,#6C5CE7,#00CEC9);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.stat-item .stat-label{font-size:13px;color:#8B949E;margin-top:4px}

/* === Section Common === */
.section{padding:70px 0}
.section-header{text-align:center;margin-bottom:48px}
.section-header h2{font-size:30px;margin-bottom:12px;color:#E6EDF3}
.section-header h2 span{color:#6C5CE7}
.section-header p{font-size:15px;color:#8B949E;max-width:600px;margin:0 auto}

/* === Video Grid === */
.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.video-card{background:#161B22;border-radius:14px;overflow:hidden;border:1px solid #21262D;transition:transform .3s,box-shadow .3s,border-color .3s}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 36px rgba(108,92,231,.2);border-color:#6C5CE7}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden}
.video-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .video-thumb img{transform:scale(1.06)}
.play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:56px;height:56px;background:rgba(108,92,231,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;z-index:2}
.play-btn::after{content:'';width:0;height:0;border-left:20px solid #fff;border-top:12px solid transparent;border-bottom:12px solid transparent;margin-left:4px}
.video-card:hover .play-btn{opacity:1}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.75);color:#fff;font-size:12px;padding:2px 8px;border-radius:4px;z-index:2}
.video-info{padding:16px}
.video-info h3{font-size:15px;margin-bottom:8px;color:#E6EDF3;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;align-items:center;gap:12px;font-size:12px;color:#8B949E}
.video-meta span{display:flex;align-items:center;gap:4px}
.video-tags{display:flex;gap:6px;margin-top:10px;flex-wrap:wrap}
.video-tags span{font-size:11px;padding:3px 10px;border-radius:12px;background:rgba(108,92,231,.12);color:#6C5CE7}

/* === Feature Cards === */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feature-card{background:#161B22;border:1px solid #21262D;border-radius:14px;padding:32px 24px;text-align:center;transition:all .3s}
.feature-card:hover{border-color:#00CEC9;transform:translateY(-4px)}
.feature-icon{width:64px;height:64px;margin:0 auto 18px;border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:28px}
.feature-icon.purple{background:rgba(108,92,231,.15);color:#6C5CE7}
.feature-icon.cyan{background:rgba(0,206,201,.15);color:#00CEC9}
.feature-icon.pink{background:rgba(253,121,168,.15);color:#FD79A8}
.feature-icon.gold{background:rgba(253,203,110,.15);color:#FDCB6E}
.feature-card h3{font-size:17px;margin-bottom:10px;color:#E6EDF3}
.feature-card p{font-size:13px;color:#8B949E;line-height:1.7}

/* === AI Section === */
.ai-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.ai-card{background:linear-gradient(145deg,#161B22,#1C2333);border:1px solid #21262D;border-radius:14px;padding:36px 28px;transition:all .3s;position:relative;overflow:hidden}
.ai-card::before{content:'';position:absolute;top:-50%;right:-50%;width:100%;height:100%;background:radial-gradient(circle,rgba(108,92,231,.08) 0%,transparent 70%);transition:all .5s}
.ai-card:hover::before{top:-30%;right:-30%}
.ai-card:hover{border-color:#6C5CE7}
.ai-card h3{font-size:18px;margin-bottom:12px;color:#E6EDF3}
.ai-card p{font-size:13px;color:#8B949E;line-height:1.8}
.ai-tag{display:inline-block;padding:4px 12px;border-radius:12px;font-size:11px;background:rgba(0,206,201,.12);color:#00CEC9;margin-top:14px}

/* === Community Tabs === */
.community-tabs{display:flex;gap:8px;justify-content:center;margin-bottom:36px;flex-wrap:wrap}
.community-tabs button{padding:10px 22px;border-radius:24px;border:1px solid #21262D;background:#161B22;color:#8B949E;font-size:14px;cursor:pointer;transition:all .3s}
.community-tabs button.active,.community-tabs button:hover{background:#6C5CE7;color:#fff;border-color:#6C5CE7}
.community-panel{display:none}
.community-panel.active{display:block}
.community-content{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.community-item{background:#161B22;border:1px solid #21262D;border-radius:12px;padding:24px;transition:all .3s}
.community-item:hover{border-color:#00CEC9}
.community-item h4{font-size:16px;margin-bottom:8px;color:#E6EDF3}
.community-item p{font-size:13px;color:#8B949E;line-height:1.7}

/* === Expert Section === */
.expert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.expert-card{background:#161B22;border:1px solid #21262D;border-radius:14px;overflow:hidden;text-align:center;transition:all .3s}
.expert-card:hover{transform:translateY(-4px);border-color:#6C5CE7}
.expert-avatar{width:100px;height:100px;border-radius:50%;margin:28px auto 16px;border:3px solid #6C5CE7;overflow:hidden}
.expert-avatar img{width:100%;height:100%;object-fit:cover}
.expert-card h3{font-size:17px;color:#E6EDF3;margin-bottom:4px}
.expert-card .expert-title{font-size:13px;color:#6C5CE7;margin-bottom:12px}
.expert-card p{font-size:13px;color:#8B949E;padding:0 20px;line-height:1.7}
.expert-links{display:flex;gap:10px;justify-content:center;padding:18px 0}
.expert-links a{padding:7px 18px;border-radius:20px;font-size:12px;border:1px solid #21262D;color:#8B949E;transition:all .3s}
.expert-links a:hover{border-color:#6C5CE7;color:#6C5CE7}

/* === Brand Wall === */
.brand-wall{display:flex;gap:24px;justify-content:center;flex-wrap:wrap;align-items:center}
.brand-wall-item{width:120px;height:60px;background:#161B22;border:1px solid #21262D;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:14px;color:#8B949E;transition:all .3s}
.brand-wall-item:hover{border-color:#6C5CE7;color:#E6EDF3}

/* === How-To Steps === */
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
.step-card{background:#161B22;border:1px solid #21262D;border-radius:14px;padding:32px 24px;text-align:center;position:relative;counter-increment:step;transition:all .3s}
.step-card:hover{border-color:#00CEC9}
.step-card::before{content:counter(step);display:flex;align-items:center;justify-content:center;width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,#6C5CE7,#00CEC9);color:#fff;font-size:20px;font-weight:800;margin:0 auto 18px}
.step-card h3{font-size:16px;margin-bottom:10px;color:#E6EDF3}
.step-card p{font-size:13px;color:#8B949E;line-height:1.7}

/* === FAQ === */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#161B22;border:1px solid #21262D;border-radius:12px;margin-bottom:12px;overflow:hidden;transition:border-color .3s}
.faq-item:hover{border-color:#6C5CE7}
.faq-question{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-size:15px;font-weight:600;color:#E6EDF3;transition:color .3s}
.faq-question::after{content:'+';font-size:22px;color:#6C5CE7;transition:transform .3s}
.faq-item.open .faq-question::after{transform:rotate(45deg)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:all .4s ease;font-size:14px;color:#8B949E;line-height:1.8}
.faq-item.open .faq-answer{padding:0 24px 18px;max-height:500px}

/* === Reviews === */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review-card{background:#161B22;border:1px solid #21262D;border-radius:14px;padding:28px;transition:all .3s}
.review-card:hover{border-color:#FD79A8}
.review-stars{color:#FDCB6E;font-size:14px;margin-bottom:12px}
.review-card p{font-size:14px;color:#8B949E;line-height:1.8;margin-bottom:14px;font-style:italic}
.review-author{display:flex;align-items:center;gap:10px}
.review-author .avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,#6C5CE7,#00CEC9);display:flex;align-items:center;justify-content:center;color:#fff;font-size:14px;font-weight:700}
.review-author .name{font-size:13px;color:#E6EDF3;font-weight:600}
.review-author .date{font-size:11px;color:#484F58}

/* === Contact Section === */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:start}
.contact-info{background:#161B22;border:1px solid #21262D;border-radius:14px;padding:32px}
.contact-info h3{font-size:18px;margin-bottom:18px;color:#E6EDF3}
.contact-item{display:flex;gap:12px;margin-bottom:16px;font-size:14px;color:#8B949E}
.contact-item strong{color:#E6EDF3;min-width:80px}
.qrcode-wrap{display:flex;gap:24px;margin-top:24px}
.qrcode-box{text-align:center}
.qrcode-box img{width:140px;height:140px;border-radius:10px;border:1px solid #21262D}
.qrcode-box p{font-size:12px;color:#8B949E;margin-top:8px}

/* === Share Bar === */
.share-bar{background:#161B22;border-top:1px solid #21262D;border-bottom:1px solid #21262D;padding:20px 0;text-align:center}
.share-bar p{font-size:14px;color:#8B949E;margin-bottom:12px}
.share-btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.share-btn{padding:8px 20px;border-radius:20px;border:1px solid #21262D;background:#161B22;color:#8B949E;font-size:13px;cursor:pointer;transition:all .3s}
.share-btn:hover{border-color:#6C5CE7;color:#6C5CE7}

/* === Footer === */
.site-footer{background:#0A0E14;border-top:1px solid #21262D;padding:50px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px;margin-bottom:40px}
.footer-brand img{height:40px;margin-bottom:14px}
.footer-brand p{font-size:13px;color:#8B949E;line-height:1.8}
.footer-col h4{font-size:15px;color:#E6EDF3;margin-bottom:16px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:2px;background:linear-gradient(90deg,#6C5CE7,#00CEC9)}
.footer-col a{display:block;font-size:13px;color:#8B949E;padding:4px 0;transition:color .3s}
.footer-col a:hover{color:#00CEC9}
.footer-bottom{border-top:1px solid #21262D;padding:20px 0;text-align:center}
.footer-bottom p{font-size:12px;color:#484F58}
.footer-bottom a{color:#6C5CE7}

/* === Breadcrumb === */
.breadcrumb{padding:14px 0;font-size:13px;color:#8B949E}
.breadcrumb a{color:#6C5CE7}
.breadcrumb span{margin:0 8px;color:#484F58}

/* === Inner Page Banner === */
.inner-banner{position:relative;height:280px;display:flex;align-items:center;justify-content:center;text-align:center;margin-top:68px;overflow:hidden}
.inner-banner .hero-bg{position:absolute;inset:0}
.inner-banner .hero-bg img{width:100%;height:100%;object-fit:cover;filter:brightness(.35)}
.inner-banner .hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(13,17,23,.4),rgba(13,17,23,.9))}
.inner-banner .inner-title{position:relative;z-index:2}
.inner-banner h1{font-size:34px;color:#E6EDF3;margin-bottom:10px}
.inner-banner p{font-size:15px;color:#8B949E}

/* === Noise Wrap (SEO hidden) === */
.noise-wrap{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* === Animations === */
.fade-in{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.fade-in.visible{opacity:1;transform:translateY(0)}

/* === Responsive === */
@media(max-width:1024px){
  .video-grid,.feature-grid,.ai-grid,.expert-grid,.review-grid{grid-template-columns:repeat(2,1fr)}
  .steps-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr}
}
@media(max-width:768px){
  .main-nav{position:fixed;top:68px;left:0;right:0;background:rgba(13,17,23,.98);flex-direction:column;padding:20px;gap:4px;transform:translateY(-120%);transition:transform .3s;border-bottom:1px solid #21262D}
  .main-nav.open{transform:translateY(0)}
  .main-nav a{padding:12px 16px;width:100%}
  .nav-toggle{display:block}
  .header-search{display:none}
  .hero-content h1{font-size:28px}
  .hero-section{min-height:400px}
  .video-grid,.feature-grid,.ai-grid,.expert-grid,.review-grid,.community-content{grid-template-columns:1fr}
  .steps-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .section{padding:48px 0}
  .section-header h2{font-size:24px}
  .inner-banner{height:220px}
  .inner-banner h1{font-size:26px}
}
@media(max-width:480px){
  .stats-grid{grid-template-columns:1fr 1fr}
  .stat-item .stat-num{font-size:24px}
  .hero-cta{flex-direction:column;align-items:center}
  .qrcode-wrap{flex-direction:column;align-items:center}
}