/* =====================================================
   校花传媒 · 全站样式表
   品牌色：深紫 #6B21A8 | 玫瑰金 #F43F5E | 米白 #FDF8FF
   ===================================================== */

/* ── 1. CSS变量 & Reset ── */
:root {
  --c-primary:   #6B21A8;
  --c-primary-d: #4C1D95;
  --c-primary-l: #9333EA;
  --c-accent:    #F43F5E;
  --c-accent-l:  #FB7185;
  --c-gold:      #D4A853;
  --c-bg:        #FDF8FF;
  --c-bg2:       #F5F0FC;
  --c-text:      #1E1B2E;
  --c-text2:     #5B5675;
  --c-white:     #FFFFFF;
  --c-border:    #E8DEF8;
  --radius-sm:   6px;
  --radius-md:   12px;
  --radius-lg:   20px;
  --shadow-sm:   0 2px 8px rgba(107,33,168,.10);
  --shadow-md:   0 6px 24px rgba(107,33,168,.15);
  --shadow-lg:   0 16px 48px rgba(107,33,168,.20);
  --trans:       .25s ease;
  --font-main:   'PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font-main);background:var(--c-bg);color:var(--c-text);line-height:1.7;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
ul,ol{list-style:none}
button{cursor:pointer;border:none;background:none;font-family:inherit}

/* ── 2. 公共容器 ── */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:72px 0}
.section-alt{background:var(--c-bg2)}

/* ── 3. 公共标题 ── */
.section-head{text-align:center;margin-bottom:48px}
.section-head .tag{display:inline-block;background:linear-gradient(135deg,var(--c-primary-l),var(--c-accent));color:#fff;font-size:.75rem;font-weight:700;letter-spacing:.12em;padding:4px 14px;border-radius:20px;margin-bottom:12px;text-transform:uppercase}
.section-head h2{font-size:clamp(1.6rem,3vw,2.2rem);font-weight:800;color:var(--c-primary-d);line-height:1.3}
.section-head p{color:var(--c-text2);margin-top:10px;max-width:560px;margin-left:auto;margin-right:auto}

/* ── 4. 按钮 ── */
.btn{display:inline-flex;align-items:center;gap:6px;padding:12px 28px;border-radius:var(--radius-md);font-weight:700;font-size:.95rem;transition:var(--trans)}
.btn-primary{background:linear-gradient(135deg,var(--c-primary),var(--c-primary-l));color:#fff;box-shadow:0 4px 16px rgba(107,33,168,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(107,33,168,.45)}
.btn-accent{background:linear-gradient(135deg,var(--c-accent),var(--c-accent-l));color:#fff;box-shadow:0 4px 16px rgba(244,63,94,.35)}
.btn-accent:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(244,63,94,.45)}
.btn-outline{border:2px solid var(--c-primary);color:var(--c-primary);background:transparent}
.btn-outline:hover{background:var(--c-primary);color:#fff}
.btn-sm{padding:8px 18px;font-size:.85rem}

/* ── 5. 顶部公告条 ── */
.top-bar{background:linear-gradient(90deg,var(--c-primary-d),var(--c-primary-l),var(--c-accent));color:#fff;text-align:center;font-size:.8rem;padding:8px 20px;letter-spacing:.04em}
.top-bar a{color:#fff;text-decoration:underline;margin-left:8px}

/* ── 6. 导航 ── */
.navbar{position:sticky;top:0;z-index:1000;background:rgba(253,248,255,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--c-border);box-shadow:var(--shadow-sm)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.nav-logo{display:flex;align-items:center;gap:10px;font-weight:900;font-size:1.25rem;color:var(--c-primary-d)}
.nav-logo img{width:38px;height:38px;border-radius:8px;object-fit:cover}
.nav-logo span{background:linear-gradient(135deg,var(--c-primary),var(--c-accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.nav-menu{display:flex;align-items:center;gap:4px}
.nav-menu a{padding:8px 14px;border-radius:var(--radius-sm);font-size:.92rem;font-weight:600;color:var(--c-text2);transition:var(--trans)}
.nav-menu a:hover,.nav-menu a.active{color:var(--c-primary);background:var(--c-bg2)}
.nav-cta{display:flex;align-items:center;gap:10px}
.nav-toggle{display:none;flex-direction:column;gap:5px;padding:8px}
.nav-toggle span{width:22px;height:2px;background:var(--c-primary);border-radius:2px;transition:var(--trans)}

/* ── 7. 搜索框 ── */
.search-bar{background:var(--c-bg2);border-bottom:1px solid var(--c-border);padding:10px 0}
.search-inner{display:flex;align-items:center;max-width:640px;margin:0 auto;gap:0}
.search-input{flex:1;border:2px solid var(--c-border);border-right:none;border-radius:var(--radius-md) 0 0 var(--radius-md);padding:10px 18px;font-size:.95rem;background:#fff;color:var(--c-text);outline:none;transition:var(--trans)}
.search-input:focus{border-color:var(--c-primary-l)}
.search-btn{background:linear-gradient(135deg,var(--c-primary),var(--c-primary-l));color:#fff;border:none;padding:10px 22px;border-radius:0 var(--radius-md) var(--radius-md) 0;font-size:.95rem;font-weight:700;cursor:pointer;transition:var(--trans)}
.search-btn:hover{background:linear-gradient(135deg,var(--c-primary-d),var(--c-primary))}

/* ── 8. Hero ── */
.hero{position:relative;min-height:580px;display:flex;align-items:center;overflow:hidden}
.hero-bg{position:absolute;inset:0;background-image:url('../images/banner_hero.jpg');background-size:cover;background-position:center top;filter:brightness(.55)}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(76,29,149,.75) 0%,rgba(107,33,168,.45) 50%,rgba(244,63,94,.25) 100%)}
.hero-content{position:relative;z-index:2;max-width:680px}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.3);color:#fff;font-size:.8rem;padding:5px 14px;border-radius:20px;margin-bottom:20px;backdrop-filter:blur(6px)}
.hero h1{font-size:clamp(2rem,5vw,3.2rem);font-weight:900;color:#fff;line-height:1.2;margin-bottom:16px}
.hero h1 em{font-style:normal;color:var(--c-accent-l)}
.hero p{font-size:1.05rem;color:rgba(255,255,255,.88);margin-bottom:28px;max-width:520px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:32px;margin-top:40px}
.hero-stat{text-align:center}
.hero-stat strong{display:block;font-size:1.6rem;font-weight:900;color:#fff}
.hero-stat span{font-size:.8rem;color:rgba(255,255,255,.75)}

/* ── 9. 视频卡片 ── */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.video-card{background:#fff;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);transition:var(--trans)}
.video-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md)}
.video-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#1a1a2e}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.video-card:hover .video-thumb img{transform:scale(1.06)}
.play-btn{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;transition:var(--trans);background:rgba(107,33,168,.35)}
.video-card:hover .play-btn{opacity:1}
.play-icon{width:56px;height:56px;background:rgba(255,255,255,.92);border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 16px rgba(0,0,0,.3)}
.play-icon svg{width:22px;height:22px;fill:var(--c-primary);margin-left:3px}
.video-tag{position:absolute;top:10px;left:10px;background:var(--c-accent);color:#fff;font-size:.7rem;font-weight:700;padding:3px 10px;border-radius:20px}
.video-duration{position:absolute;bottom:10px;right:10px;background:rgba(0,0,0,.65);color:#fff;font-size:.72rem;padding:2px 8px;border-radius:4px}
.video-info{padding:14px 16px}
.video-info h3{font-size:.95rem;font-weight:700;color:var(--c-text);line-height:1.4;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;align-items:center;justify-content:space-between;font-size:.78rem;color:var(--c-text2)}
.video-meta-left{display:flex;gap:12px}
.video-meta span{display:flex;align-items:center;gap:3px}

/* ── 10. 功能特性卡片 ── */
.features-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:24px}
.feature-card{background:#fff;border-radius:var(--radius-lg);padding:28px 24px;box-shadow:var(--shadow-sm);transition:var(--trans);border:1px solid var(--c-border)}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--c-primary-l)}
.feature-icon{width:52px;height:52px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:16px}
.feature-card h3{font-size:1rem;font-weight:700;color:var(--c-primary-d);margin-bottom:8px}
.feature-card p{font-size:.88rem;color:var(--c-text2);line-height:1.6}

/* ── 11. AI赋能区 ── */
.ai-section{background:linear-gradient(135deg,var(--c-primary-d) 0%,var(--c-primary) 50%,#7C3AED 100%);color:#fff;position:relative;overflow:hidden}
.ai-section::before{content:'';position:absolute;top:-50%;right:-20%;width:600px;height:600px;background:radial-gradient(circle,rgba(244,63,94,.2),transparent 70%);pointer-events:none}
.ai-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.ai-text h2{font-size:clamp(1.6rem,3vw,2.2rem);font-weight:800;margin-bottom:16px}
.ai-text p{opacity:.88;margin-bottom:24px;line-height:1.8}
.ai-features{display:flex;flex-direction:column;gap:14px;margin-bottom:28px}
.ai-feature-item{display:flex;align-items:flex-start;gap:12px}
.ai-feature-item .dot{width:8px;height:8px;border-radius:50%;background:var(--c-accent-l);flex-shrink:0;margin-top:7px}
.ai-feature-item p{font-size:.9rem;opacity:.9}
.ai-image{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-lg)}
.ai-image img{width:100%;height:100%;object-fit:cover}

/* ── 12. 专家区 ── */
.experts-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:28px}
.expert-card{background:#fff;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);transition:var(--trans)}
.expert-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.expert-photo{aspect-ratio:1;overflow:hidden}
.expert-photo img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.expert-card:hover .expert-photo img{transform:scale(1.05)}
.expert-body{padding:20px}
.expert-name{font-size:1.05rem;font-weight:800;color:var(--c-primary-d)}
.expert-title{font-size:.82rem;color:var(--c-accent);font-weight:600;margin:4px 0 10px}
.expert-desc{font-size:.85rem;color:var(--c-text2);line-height:1.6;margin-bottom:14px}
.expert-awards{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px}
.expert-awards span{background:var(--c-bg2);color:var(--c-primary);font-size:.72rem;padding:3px 10px;border-radius:20px;border:1px solid var(--c-border)}
.expert-actions{display:flex;gap:8px}

/* ── 13. 社区区 ── */
.community-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px}
.community-card{background:#fff;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);transition:var(--trans)}
.community-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.community-img{aspect-ratio:4/3;overflow:hidden}
.community-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.community-card:hover .community-img img{transform:scale(1.06)}
.community-body{padding:14px}
.community-body h3{font-size:.9rem;font-weight:700;color:var(--c-text);margin-bottom:6px}
.community-meta{display:flex;gap:10px;font-size:.75rem;color:var(--c-text2)}

/* ── 14. 合作伙伴 ── */
.partners-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:20px}
.partner-item{background:#fff;border:1px solid var(--c-border);border-radius:var(--radius-md);padding:16px 28px;font-size:.9rem;font-weight:700;color:var(--c-text2);transition:var(--trans)}
.partner-item:hover{border-color:var(--c-primary-l);color:var(--c-primary);box-shadow:var(--shadow-sm)}

/* ── 15. FAQ ── */
.faq-list{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:#fff;border-radius:var(--radius-md);border:1px solid var(--c-border);overflow:hidden}
.faq-q{display:flex;justify-content:space-between;align-items:center;padding:18px 22px;cursor:pointer;font-weight:700;color:var(--c-primary-d);transition:var(--trans)}
.faq-q:hover{background:var(--c-bg2)}
.faq-q .arrow{width:20px;height:20px;border-radius:50%;background:var(--c-bg2);display:flex;align-items:center;justify-content:center;transition:transform var(--trans);flex-shrink:0}
.faq-item.open .faq-q .arrow{transform:rotate(180deg);background:var(--c-primary);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease,padding .35s ease}
.faq-item.open .faq-a{max-height:300px;padding:0 22px 18px}
.faq-a p{font-size:.9rem;color:var(--c-text2);line-height:1.8}

/* ── 16. 评价 ── */
.reviews-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.review-card{background:#fff;border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow-sm);border:1px solid var(--c-border)}
.review-stars{color:#F59E0B;font-size:1rem;margin-bottom:10px}
.review-text{font-size:.9rem;color:var(--c-text2);line-height:1.7;margin-bottom:16px}
.review-author{display:flex;align-items:center;gap:10px}
.review-avatar{width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,var(--c-primary-l),var(--c-accent));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.9rem;flex-shrink:0}
.review-name{font-weight:700;font-size:.88rem;color:var(--c-text)}
.review-date{font-size:.75rem;color:var(--c-text2)}

/* ── 17. 联系区 ── */
.contact-section{background:linear-gradient(135deg,var(--c-primary-d),var(--c-primary))}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.contact-info h2{font-size:1.8rem;font-weight:800;color:#fff;margin-bottom:12px}
.contact-info p{color:rgba(255,255,255,.85);margin-bottom:24px}
.contact-list{display:flex;flex-direction:column;gap:14px}
.contact-row{display:flex;align-items:center;gap:12px;color:rgba(255,255,255,.9);font-size:.9rem}
.contact-row .ci{width:36px;height:36px;background:rgba(255,255,255,.15);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:1rem;flex-shrink:0}
.qr-group{display:flex;gap:20px}
.qr-box{background:rgba(255,255,255,.1);border-radius:var(--radius-md);padding:16px;text-align:center;backdrop-filter:blur(6px)}
.qr-box img{width:110px;height:110px;border-radius:var(--radius-sm);object-fit:cover}
.qr-box p{color:rgba(255,255,255,.85);font-size:.78rem;margin-top:8px}

/* ── 18. 社交分享 ── */
.share-bar{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:var(--radius-sm);font-size:.82rem;font-weight:600;transition:var(--trans)}
.share-wechat{background:#07C160;color:#fff}
.share-weibo{background:#E6162D;color:#fff}
.share-douyin{background:#000;color:#fff}
.share-bilibili{background:#00A1D6;color:#fff}
.share-btn:hover{opacity:.85;transform:translateY(-1px)}

/* ── 19. 面包屑 ── */
.breadcrumb{padding:14px 0;font-size:.82rem;color:var(--c-text2)}
.breadcrumb a{color:var(--c-primary);transition:var(--trans)}
.breadcrumb a:hover{color:var(--c-accent)}
.breadcrumb span{margin:0 6px}

/* ── 20. 页脚 ── */
.footer{background:var(--c-primary-d);color:rgba(255,255,255,.85)}
.footer-top{padding:56px 0 40px;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}
.footer-brand .logo-row{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand img{width:36px;height:36px;border-radius:8px;object-fit:cover}
.footer-brand .brand-name{font-size:1.15rem;font-weight:900;color:#fff}
.footer-brand p{font-size:.85rem;line-height:1.7;opacity:.8;margin-bottom:16px}
.footer-col h4{font-size:.9rem;font-weight:800;color:#fff;margin-bottom:16px;padding-bottom:8px;border-bottom:1px solid rgba(255,255,255,.15)}
.footer-col ul li{margin-bottom:8px}
.footer-col ul li a{font-size:.85rem;opacity:.75;transition:var(--trans)}
.footer-col ul li a:hover{opacity:1;color:var(--c-accent-l)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 0;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;font-size:.8rem;opacity:.7}
.footer-bottom a{opacity:1;color:rgba(255,255,255,.7)}
.footer-bottom a:hover{color:var(--c-accent-l)}

/* ── 21. 内页Hero ── */
.page-hero{background:linear-gradient(135deg,var(--c-primary-d),var(--c-primary));padding:56px 0;text-align:center;color:#fff}
.page-hero h1{font-size:clamp(1.8rem,4vw,2.6rem);font-weight:900;margin-bottom:10px}
.page-hero p{opacity:.88;max-width:520px;margin:0 auto}

/* ── 22. 统计数字 ── */
.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat-card{background:#fff;border-radius:var(--radius-lg);padding:28px 20px;text-align:center;box-shadow:var(--shadow-sm)}
.stat-card strong{display:block;font-size:2rem;font-weight:900;background:linear-gradient(135deg,var(--c-primary),var(--c-accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.stat-card span{font-size:.85rem;color:var(--c-text2)}

/* ── 23. How-To步骤 ── */
.steps-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:24px}
.step-card{background:#fff;border-radius:var(--radius-lg);padding:28px 22px;box-shadow:var(--shadow-sm);position:relative;border:1px solid var(--c-border)}
.step-num{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--c-primary),var(--c-accent));color:#fff;font-weight:900;font-size:1rem;display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.step-card h3{font-size:.95rem;font-weight:700;color:var(--c-primary-d);margin-bottom:8px}
.step-card p{font-size:.85rem;color:var(--c-text2);line-height:1.6}

/* ── 24. 响应式 ── */
@media(max-width:1024px){
  .ai-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr 1fr}
  .stats-row{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .nav-menu,.nav-cta{display:none}
  .nav-toggle{display:flex}
  .nav-menu.open{display:flex;flex-direction:column;position:absolute;top:64px;left:0;right:0;background:#fff;padding:16px;border-bottom:1px solid var(--c-border);box-shadow:var(--shadow-md)}
  .nav-cta.open{display:flex;padding:0 16px 16px;background:#fff;border-bottom:1px solid var(--c-border)}
  .hero{min-height:440px}
  .hero-stats{gap:20px}
  .hero-stat strong{font-size:1.2rem}
  .video-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
  .footer-top{grid-template-columns:1fr}
  .stats-row{grid-template-columns:repeat(2,1fr)}
  .qr-group{flex-direction:column;align-items:flex-start}
  .section{padding:48px 0}
}
@media(max-width:480px){
  .hero h1{font-size:1.7rem}
  .hero-btns{flex-direction:column}
  .stats-row{grid-template-columns:1fr 1fr}
  .video-grid{grid-template-columns:1fr}
  .reviews-grid{grid-template-columns:1fr}
}

/* ── 25. 懒加载占位 ── */
img[loading="lazy"]{background:var(--c-bg2)}

/* ── 26. 滚动条美化 ── */
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--c-bg2)}
::-webkit-scrollbar-thumb{background:var(--c-primary-l);border-radius:3px}

/* ── 27. 选中色 ── */
::selection{background:var(--c-primary-l);color:#fff}