/* ============================================
   小小绘 - 原创样式表
   品牌色系：小小绘粉 #E8456B / 暖橘 #FF7E5F / 深夜蓝 #1A1A2E
   ============================================ */

/* --- CSS Reset & Base --- */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","WenQuanYi Micro Hei",sans-serif;color:#2D2D3A;background:#FFF5F7;line-height:1.7;overflow-x:hidden}
a{color:#E8456B;text-decoration:none;transition:color .3s}
a:hover{color:#FF7E5F}
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;color:#1A1A2E}

/* --- Container --- */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:2rem;margin-bottom:10px;position:relative;display:inline-block}
.section-title h2::after{content:"";display:block;width:60px;height:4px;background:linear-gradient(90deg,#E8456B,#FF7E5F);margin:10px auto 0;border-radius:2px}
.section-title p{color:#6B7280;font-size:1rem}

/* --- Header / Navigation --- */
.site-header{background:#1A1A2E;position:sticky;top:0;z-index:1000;box-shadow:0 2px 20px rgba(0,0,0,.15)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:0 20px;max-width:1200px;margin:0 auto;height:68px}
.logo-link{display:flex;align-items:center;gap:10px}
.logo-link img{height:42px;width:auto}
.logo-text{color:#fff;font-size:1.3rem;font-weight:700}
.logo-text span{color:#E8456B}

/* Desktop Nav */
.main-nav{display:flex;align-items:center;gap:0}
.main-nav a{color:#ddd;padding:0 16px;font-size:.95rem;height:68px;display:flex;align-items:center;transition:all .3s;position:relative}
.main-nav a:hover,.main-nav a.active{color:#fff;background:rgba(232,69,107,.15)}
.main-nav a::after{content:"";position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:0;height:3px;background:linear-gradient(90deg,#E8456B,#FF7E5F);transition:width .3s;border-radius:2px}
.main-nav a:hover::after,.main-nav a.active::after{width:70%}

/* Mobile Menu Toggle */
.menu-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px}
.menu-toggle span{display:block;width:24px;height:2px;background:#fff;margin:5px 0;transition:all .3s}

/* --- Search Bar --- */
.search-bar{background:linear-gradient(135deg,#1A1A2E 0%,#16213E 100%);padding:16px 0}
.search-form{max-width:680px;margin:0 auto;display:flex;gap:0;border-radius:50px;overflow:hidden;box-shadow:0 4px 20px rgba(232,69,107,.2)}
.search-form input{flex:1;padding:14px 24px;border:none;font-size:1rem;outline:none;background:#fff;color:#2D2D3A}
.search-form input::placeholder{color:#aaa}
.search-form button{background:linear-gradient(135deg,#E8456B,#FF7E5F);color:#fff;border:none;padding:14px 32px;font-size:1rem;cursor:pointer;transition:opacity .3s;white-space:nowrap}
.search-form button:hover{opacity:.9}

/* --- Hero Banner --- */
.hero-section{position:relative;height:520px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.hero-section .hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(.6)}
.hero-content{position:relative;z-index:2;text-align:center;color:#fff;padding:0 20px}
.hero-content h1{font-size:2.8rem;margin-bottom:16px;text-shadow:0 2px 10px rgba(0,0,0,.5)}
.hero-content p{font-size:1.2rem;margin-bottom:28px;text-shadow:0 1px 6px rgba(0,0,0,.4);max-width:640px;margin-left:auto;margin-right:auto}
.hero-content .hero-tags{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:24px}
.hero-content .hero-tags span{background:rgba(232,69,107,.7);padding:6px 18px;border-radius:20px;font-size:.9rem}
.btn-primary{display:inline-block;background:linear-gradient(135deg,#E8456B,#FF7E5F);color:#fff;padding:14px 36px;border-radius:50px;font-size:1.05rem;font-weight:600;transition:transform .3s,box-shadow .3s;box-shadow:0 4px 15px rgba(232,69,107,.4)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 25px rgba(232,69,107,.5);color:#fff}
.btn-outline{display:inline-block;border:2px solid #E8456B;color:#E8456B;padding:12px 32px;border-radius:50px;font-size:1rem;font-weight:600;transition:all .3s}
.btn-outline:hover{background:#E8456B;color:#fff}

/* --- Section Spacing --- */
.section{padding:60px 0}
.section-alt{background:#fff}
.section-dark{background:#1A1A2E;color:#fff}
.section-dark h2,.section-dark h3,.section-dark h4{color:#fff}
.section-dark p{color:#ccc}

/* --- Video Cards Grid --- */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:24px}
.video-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 16px rgba(0,0,0,.06);transition:transform .3s,box-shadow .3s;cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 32px rgba(232,69,107,.12)}
.video-card .thumb{position:relative;padding-top:56.25%;overflow:hidden}
.video-card .thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.video-card:hover .thumb img{transform:scale(1.05)}
.video-card .play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:60px;height:60px;background:rgba(232,69,107,.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:12px 0 12px 20px;border-color:transparent transparent transparent #fff;margin-left:4px}
.video-card .card-body{padding:16px}
.video-card .card-body h3{font-size:1.05rem;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-card .card-meta{display:flex;justify-content:space-between;color:#6B7280;font-size:.85rem}
.video-card .card-meta .views{display:flex;align-items:center;gap:4px}
.video-card .card-tags{display:flex;gap:6px;margin-top:8px;flex-wrap:wrap}
.video-card .card-tags span{background:#FFF5F7;color:#E8456B;padding:2px 10px;border-radius:12px;font-size:.78rem}

/* --- Stats Bar --- */
.stats-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center;padding:40px 0}
.stat-item .stat-num{font-size:2.4rem;font-weight:800;background:linear-gradient(135deg,#E8456B,#FF7E5F);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.stat-item .stat-label{color:#6B7280;font-size:.95rem;margin-top:4px}

/* --- Service Cards --- */
.service-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.service-card{background:#fff;border-radius:12px;padding:32px 24px;text-align:center;box-shadow:0 4px 16px rgba(0,0,0,.05);transition:transform .3s,box-shadow .3s;border:1px solid #f0f0f0}
.service-card:hover{transform:translateY(-4px);box-shadow:0 8px 28px rgba(232,69,107,.1);border-color:#E8456B}
.service-card .icon{width:64px;height:64px;margin:0 auto 16px;background:linear-gradient(135deg,#E8456B,#FF7E5F);border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:28px;color:#fff}
.service-card h3{font-size:1.1rem;margin-bottom:8px}
.service-card p{color:#6B7280;font-size:.92rem}

/* --- Expert Cards --- */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.expert-card{background:#fff;border-radius:12px;padding:28px 20px;text-align:center;box-shadow:0 4px 16px rgba(0,0,0,.05);transition:transform .3s}
.expert-card:hover{transform:translateY(-4px)}
.expert-card .avatar{width:90px;height:90px;border-radius:50%;margin:0 auto 14px;overflow:hidden;border:3px solid #E8456B;background:#f0f0f0}
.expert-card .avatar img{width:100%;height:100%;object-fit:cover}
.expert-card h4{font-size:1.05rem;margin-bottom:4px}
.expert-card .role{color:#E8456B;font-size:.88rem;margin-bottom:8px}
.expert-card p{color:#6B7280;font-size:.88rem;margin-bottom:12px}
.expert-card .expert-links{display:flex;gap:10px;justify-content:center}
.expert-card .expert-links a{padding:6px 16px;border-radius:20px;font-size:.82rem;border:1px solid #E8456B;color:#E8456B;transition:all .3s}
.expert-card .expert-links a:hover{background:#E8456B;color:#fff}

/* --- Partner Logos --- */
.partner-wall{display:flex;flex-wrap:wrap;gap:30px;justify-content:center;align-items:center}
.partner-wall .partner-item{width:140px;height:70px;background:#fff;border-radius:8px;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 8px rgba(0,0,0,.05);padding:10px;filter:grayscale(100%);opacity:.6;transition:all .3s}
.partner-wall .partner-item:hover{filter:grayscale(0);opacity:1}

/* --- Reviews --- */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.review-card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 4px 16px rgba(0,0,0,.05)}
.review-card .stars{color:#FFD93D;font-size:1.1rem;margin-bottom:10px}
.review-card .review-text{color:#2D2D3A;font-size:.95rem;margin-bottom:14px;font-style:italic;line-height:1.6}
.review-card .reviewer{display:flex;align-items:center;gap:10px}
.review-card .reviewer .r-avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#E8456B,#FF7E5F);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.9rem}
.review-card .reviewer .r-info .r-name{font-weight:600;font-size:.9rem}
.review-card .reviewer .r-info .r-date{color:#6B7280;font-size:.8rem}

/* --- 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}
.faq-item .faq-q{padding:18px 24px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background .3s}
.faq-item .faq-q:hover{background:#FFF5F7}
.faq-item .faq-q .arrow{transition:transform .3s;font-size:1.2rem;color:#E8456B}
.faq-item.open .faq-q .arrow{transform:rotate(180deg)}
.faq-item .faq-a{padding:0 24px;max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s;color:#6B7280;font-size:.95rem;line-height:1.7}
.faq-item.open .faq-a{max-height:300px;padding:0 24px 18px}

/* --- Contact Section --- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.contact-info h3{font-size:1.3rem;margin-bottom:16px}
.contact-info .info-item{display:flex;align-items:flex-start;gap:12px;margin-bottom:16px}
.contact-info .info-item .info-icon{width:40px;height:40px;background:linear-gradient(135deg,#E8456B,#FF7E5F);border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.1rem;flex-shrink:0}
.contact-info .info-item .info-text strong{display:block;font-size:.95rem}
.contact-info .info-item .info-text span{color:#6B7280;font-size:.88rem}
.contact-qr{display:flex;gap:30px;justify-content:center}
.contact-qr .qr-item{text-align:center}
.contact-qr .qr-item img{width:160px;height:160px;border-radius:10px;margin-bottom:8px}
.contact-qr .qr-item p{font-size:.88rem;color:#6B7280}

/* --- Social Share --- */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;padding:20px 0}
.share-bar a{display:flex;align-items:center;gap:6px;padding:8px 20px;border-radius:20px;font-size:.88rem;color:#fff;transition:opacity .3s}
.share-bar a:hover{opacity:.85;color:#fff}
.share-wechat{background:#07C160}
.share-weibo{background:#E6162D}
.share-douyin{background:#000}
.share-bilibili{background:#00A1D6}

/* --- Footer --- */
.site-footer{background:#1A1A2E;color:#ccc;padding:40px 0 0}
.footer-inner{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;max-width:1200px;margin:0 auto;padding:0 20px}
.footer-col h4{color:#fff;font-size:1rem;margin-bottom:16px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:"";position:absolute;bottom:0;left:0;width:30px;height:2px;background:#E8456B}
.footer-col p{font-size:.88rem;line-height:1.8;color:#999}
.footer-col a{color:#999;font-size:.88rem;display:block;margin-bottom:8px;transition:color .3s}
.footer-col a:hover{color:#E8456B}
.footer-col .footer-logo{display:flex;align-items:center;gap:8px;margin-bottom:12px}
.footer-col .footer-logo img{height:36px}
.footer-col .footer-logo span{color:#fff;font-size:1.1rem;font-weight:700}
.footer-bottom{text-align:center;padding:20px;margin-top:30px;border-top:1px solid rgba(255,255,255,.08);font-size:.85rem;color:#666}
.footer-bottom a{color:#E8456B}

/* --- Breadcrumb --- */
.breadcrumb{padding:12px 0;font-size:.88rem;color:#6B7280}
.breadcrumb a{color:#E8456B}
.breadcrumb span{margin:0 6px;color:#ccc}

/* --- How-to Guide --- */
.howto-steps{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:24px;counter-reset:step}
.howto-step{background:#fff;border-radius:12px;padding:28px 20px;text-align:center;box-shadow:0 4px 16px rgba(0,0,0,.05);position:relative;counter-increment:step}
.howto-step::before{content:counter(step);position:absolute;top:-14px;left:50%;transform:translateX(-50%);width:32px;height:32px;background:linear-gradient(135deg,#E8456B,#FF7E5F);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.95rem}
.howto-step h4{margin-top:8px;margin-bottom:8px;font-size:1rem}
.howto-step p{color:#6B7280;font-size:.9rem}

/* --- Inner Page Hero --- */
.inner-hero{background:linear-gradient(135deg,#1A1A2E,#16213E);padding:50px 0 40px;text-align:center;color:#fff}
.inner-hero h1{font-size:2.2rem;margin-bottom:10px}
.inner-hero p{color:#ccc;font-size:1rem;max-width:600px;margin:0 auto}

/* --- AI Feature Cards --- */
.ai-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.ai-card{background:linear-gradient(135deg,#16213E,#1A1A2E);border-radius:12px;padding:28px;color:#fff;border:1px solid rgba(232,69,107,.2);transition:border-color .3s,transform .3s}
.ai-card:hover{border-color:#E8456B;transform:translateY(-4px)}
.ai-card h3{font-size:1.1rem;margin-bottom:10px;color:#FFD93D}
.ai-card p{color:#ccc;font-size:.92rem}

/* --- Community Features --- */
.community-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:20px}
.community-item{background:#fff;border-radius:12px;padding:24px 16px;text-align:center;box-shadow:0 4px 12px rgba(0,0,0,.05);transition:transform .3s}
.community-item:hover{transform:translateY(-4px)}
.community-item .c-icon{font-size:2.2rem;margin-bottom:10px}
.community-item h4{font-size:.98rem;margin-bottom:6px}
.community-item p{color:#6B7280;font-size:.85rem}

/* --- Lazy Load Placeholder --- */
.lazy{opacity:0;transition:opacity .6s}
.lazy.loaded{opacity:1}

/* --- Responsive --- */
@media(max-width:768px){
  .header-inner{padding:0 16px}
  .main-nav{display:none;position:absolute;top:68px;left:0;right:0;background:#1A1A2E;flex-direction:column;padding:10px 0;box-shadow:0 4px 20px rgba(0,0,0,.2)}
  .main-nav.open{display:flex}
  .main-nav a{height:auto;padding:12px 24px;border-bottom:1px solid rgba(255,255,255,.05)}
  .main-nav a::after{display:none}
  .menu-toggle{display:block}
  .hero-section{height:380px}
  .hero-content h1{font-size:1.8rem}
  .hero-content p{font-size:1rem}
  .video-grid{grid-template-columns:1fr}
  .stats-bar{grid-template-columns:repeat(2,1fr);gap:16px}
  .service-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
  .footer-col{text-align:center}
  .footer-col h4::after{margin:0 auto}
  .section{padding:40px 0}
  .section-title h2{font-size:1.6rem}
  .contact-qr{flex-direction:column;align-items:center}
  .ai-grid{grid-template-columns:1fr}
  .howto-steps{grid-template-columns:1fr}
}
@media(min-width:769px) and (max-width:1024px){
  .video-grid{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr 1fr}
}