/* 91网 - 极简高端风格主样式 */
:root {
  --primary: #1a1a2e;
  --accent: #e94560;
  --accent2: #0f3460;
  --bg: #ffffff;
  --bg2: #f8f8f8;
  --text: #1a1a2e;
  --text2: #555;
  --border: #e8e8e8;
  --radius: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.07);
  --transition: 0.3s ease;
  --font: 'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--accent)}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
button{cursor:pointer;border:none;background:none;font-family:var(--font)}

/* ===== HEADER ===== */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,0.97);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);transition:box-shadow var(--transition)}
.site-header.scrolled{box-shadow:0 2px 20px rgba(0,0,0,0.08)}
.header-inner{max-width:1200px;margin:0 auto;padding:0 24px;display:flex;align-items:center;height:64px;gap:32px}
.logo{display:flex;align-items:center;gap:10px;font-size:1.4rem;font-weight:700;color:var(--primary);letter-spacing:-0.5px;flex-shrink:0}
.logo-icon{width:36px;height:36px;background:linear-gradient(135deg,var(--accent),var(--accent2));border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1rem;font-weight:900}
.main-nav{display:flex;align-items:center;gap:4px;flex:1}
.main-nav a{padding:6px 14px;border-radius:6px;font-size:0.93rem;color:var(--text2);font-weight:500;transition:all var(--transition)}
.main-nav a:hover,.main-nav a.active{color:var(--accent);background:#fff0f3}
.search-bar{display:flex;align-items:center;background:var(--bg2);border:1px solid var(--border);border-radius:24px;padding:6px 16px;gap:8px;min-width:200px;transition:border var(--transition)}
.search-bar:focus-within{border-color:var(--accent)}
.search-bar input{border:none;background:none;outline:none;font-size:0.88rem;color:var(--text);width:100%;font-family:var(--font)}
.search-bar button{color:var(--text2);font-size:1rem;padding:0;transition:color var(--transition)}
.search-bar button:hover{color:var(--accent)}
.header-cta{flex-shrink:0;background:var(--accent);color:#fff;padding:8px 20px;border-radius:24px;font-size:0.88rem;font-weight:600;transition:all var(--transition)}
.header-cta:hover{background:#c73652;color:#fff;transform:translateY(-1px)}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:4px}
.hamburger span{display:block;width:22px;height:2px;background:var(--text);border-radius:2px;transition:all var(--transition)}

/* ===== HERO / BANNER ===== */
.hero{position:relative;min-height:90vh;display:flex;align-items:center;overflow:hidden;background:var(--primary)}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0.25;transition:opacity 0.5s}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(26,26,46,0.92) 0%,rgba(15,52,96,0.75) 100%)}
.hero-content{position:relative;z-index:2;max-width:1200px;margin:0 auto;padding:80px 24px;display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.hero-text{}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(233,69,96,0.15);border:1px solid rgba(233,69,96,0.3);color:#ff8fa3;padding:6px 14px;border-radius:20px;font-size:0.82rem;font-weight:600;margin-bottom:24px;letter-spacing:0.5px}
.hero h1{font-size:clamp(2rem,4vw,3.2rem);font-weight:800;color:#fff;line-height:1.2;margin-bottom:20px;letter-spacing:-1px}
.hero h1 em{color:var(--accent);font-style:normal}
.hero-desc{font-size:1.05rem;color:rgba(255,255,255,0.75);margin-bottom:36px;max-width:480px;line-height:1.8}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.btn-primary{background:var(--accent);color:#fff;padding:14px 32px;border-radius:32px;font-size:1rem;font-weight:700;transition:all var(--transition);display:inline-flex;align-items:center;gap:8px}
.btn-primary:hover{background:#c73652;color:#fff;transform:translateY(-2px);box-shadow:0 8px 24px rgba(233,69,96,0.4)}
.btn-outline{border:2px solid rgba(255,255,255,0.4);color:#fff;padding:12px 28px;border-radius:32px;font-size:1rem;font-weight:600;transition:all var(--transition)}
.btn-outline:hover{border-color:#fff;background:rgba(255,255,255,0.1);color:#fff}
.hero-stats{display:flex;gap:32px;margin-top:40px}
.hero-stat{text-align:center}
.hero-stat strong{display:block;font-size:1.8rem;font-weight:800;color:#fff}
.hero-stat span{font-size:0.82rem;color:rgba(255,255,255,0.6)}
.hero-visual{position:relative}
.hero-video-card{background:rgba(255,255,255,0.08);backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,0.15);border-radius:16px;overflow:hidden;cursor:pointer}
.hero-video-card img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform 0.4s}
.hero-video-card:hover img{transform:scale(1.03)}
.hero-play{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:64px;height:64px;background:rgba(233,69,96,0.9);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.4rem;transition:all var(--transition);pointer-events:none}
.hero-video-card:hover .hero-play{background:var(--accent);transform:translate(-50%,-50%) scale(1.1)}
.hero-video-info{padding:16px}
.hero-video-info h3{color:#fff;font-size:1rem;font-weight:600;margin-bottom:6px}
.hero-video-meta{display:flex;gap:16px;font-size:0.82rem;color:rgba(255,255,255,0.6)}

/* ===== SECTIONS ===== */
.section{padding:80px 0}
.section-alt{background:var(--bg2)}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section-header{text-align:center;margin-bottom:56px}
.section-tag{display:inline-block;background:rgba(233,69,96,0.08);color:var(--accent);padding:4px 14px;border-radius:20px;font-size:0.82rem;font-weight:600;margin-bottom:12px;letter-spacing:0.5px}
.section-header h2{font-size:clamp(1.6rem,3vw,2.4rem);font-weight:800;color:var(--primary);margin-bottom:12px;letter-spacing:-0.5px}
.section-header p{font-size:1rem;color:var(--text2);max-width:560px;margin:0 auto}

/* ===== VIDEO CARDS ===== */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.video-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:var(--shadow);transition:all var(--transition);cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 40px rgba(0,0,0,0.12)}
.video-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#f0f0f0}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 0.4s;loading:lazy}
.video-card:hover .video-thumb img{transform:scale(1.05)}
.video-play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:52px;height:52px;background:rgba(233,69,96,0.85);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.2rem;opacity:0;transition:all var(--transition)}
.video-card:hover .video-play-btn{opacity:1;transform:translate(-50%,-50%) scale(1.1)}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,0.7);color:#fff;font-size:0.75rem;padding:2px 8px;border-radius:4px}
.video-info{padding:16px}
.video-info h3{font-size:0.95rem;font-weight:600;color:var(--primary);margin-bottom:8px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;gap:12px;font-size:0.8rem;color:var(--text2)}
.video-meta span{display:flex;align-items:center;gap:4px}
.video-tag{display:inline-block;background:rgba(233,69,96,0.08);color:var(--accent);font-size:0.75rem;padding:2px 8px;border-radius:4px;margin-bottom:8px}

/* ===== FEATURES ===== */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.feature-card{padding:36px 28px;border-radius:12px;background:#fff;border:1px solid var(--border);transition:all var(--transition);text-align:center}
.feature-card:hover{border-color:var(--accent);box-shadow:0 8px 32px rgba(233,69,96,0.1);transform:translateY(-4px)}
.feature-icon{width:56px;height:56px;background:linear-gradient(135deg,rgba(233,69,96,0.1),rgba(15,52,96,0.1));border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.6rem;margin:0 auto 20px}
.feature-card h3{font-size:1.1rem;font-weight:700;color:var(--primary);margin-bottom:10px}
.feature-card p{font-size:0.9rem;color:var(--text2);line-height:1.7}

/* ===== STATS ===== */
.stats-section{background:linear-gradient(135deg,var(--primary),var(--accent2));padding:64px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;text-align:center}
.stat-item strong{display:block;font-size:2.4rem;font-weight:800;color:#fff;margin-bottom:6px}
.stat-item span{font-size:0.9rem;color:rgba(255,255,255,0.7)}

/* ===== NEWS / ARTICLES ===== */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.news-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:var(--shadow);transition:all var(--transition)}
.news-card:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(0,0,0,0.12)}
.news-img{aspect-ratio:3/2;overflow:hidden}
.news-img img{width:100%;height:100%;object-fit:cover;transition:transform 0.4s}
.news-card:hover .news-img img{transform:scale(1.05)}
.news-body{padding:20px}
.news-cat{font-size:0.78rem;color:var(--accent);font-weight:600;margin-bottom:8px;text-transform:uppercase;letter-spacing:0.5px}
.news-body h3{font-size:1rem;font-weight:700;color:var(--primary);margin-bottom:10px;line-height:1.4}
.news-body p{font-size:0.88rem;color:var(--text2);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-footer{display:flex;justify-content:space-between;align-items:center;margin-top:14px;font-size:0.8rem;color:var(--text2)}
.news-footer a{color:var(--accent);font-weight:600}

/* ===== REVIEWS ===== */
.reviews-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.review-card{background:#fff;border-radius:12px;padding:28px;border:1px solid var(--border);transition:all var(--transition)}
.review-card:hover{border-color:var(--accent);box-shadow:0 8px 32px rgba(233,69,96,0.08)}
.review-stars{color:#f5a623;font-size:1rem;margin-bottom:12px;letter-spacing:2px}
.review-text{font-size:0.95rem;color:var(--text2);line-height:1.7;margin-bottom:16px;font-style:italic}
.review-author{display:flex;align-items:center;gap:12px}
.review-avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent2));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:0.9rem}
.review-author-info strong{display:block;font-size:0.9rem;font-weight:700;color:var(--primary)}
.review-author-info span{font-size:0.8rem;color:var(--text2)}

/* ===== FAQ ===== */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--border)}
.faq-q{display:flex;justify-content:space-between;align-items:center;padding:20px 0;cursor:pointer;font-size:1rem;font-weight:600;color:var(--primary);transition:color var(--transition)}
.faq-q:hover{color:var(--accent)}
.faq-q .faq-icon{width:24px;height:24px;border-radius:50%;background:var(--bg2);display:flex;align-items:center;justify-content:center;font-size:1.1rem;color:var(--text2);transition:all var(--transition);flex-shrink:0}
.faq-item.open .faq-q{color:var(--accent)}
.faq-item.open .faq-icon{background:var(--accent);color:#fff;transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 0.4s ease,padding 0.3s}
.faq-a p{padding-bottom:20px;font-size:0.93rem;color:var(--text2);line-height:1.8}
.faq-item.open .faq-a{max-height:200px}

/* ===== CONTACT ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:start}
.contact-info h3{font-size:1.4rem;font-weight:700;color:var(--primary);margin-bottom:16px}
.contact-info p{color:var(--text2);line-height:1.8;margin-bottom:24px}
.contact-items{display:flex;flex-direction:column;gap:16px}
.contact-item{display:flex;align-items:center;gap:14px;font-size:0.93rem;color:var(--text2)}
.contact-item-icon{width:40px;height:40px;background:rgba(233,69,96,0.08);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.1rem;flex-shrink:0}
.contact-form{background:#fff;border-radius:16px;padding:36px;box-shadow:var(--shadow);border:1px solid var(--border)}
.form-group{margin-bottom:20px}
.form-group label{display:block;font-size:0.88rem;font-weight:600;color:var(--primary);margin-bottom:6px}
.form-group input,.form-group textarea,.form-group select{width:100%;padding:12px 16px;border:1px solid var(--border);border-radius:8px;font-size:0.93rem;font-family:var(--font);color:var(--text);background:#fff;transition:border var(--transition);outline:none}
.form-group input:focus,.form-group textarea:focus{border-color:var(--accent)}
.form-group textarea{resize:vertical;min-height:100px}
.form-submit{width:100%;background:var(--accent);color:#fff;padding:14px;border-radius:8px;font-size:1rem;font-weight:700;transition:all var(--transition)}
.form-submit:hover{background:#c73652;transform:translateY(-1px)}

/* ===== FOOTER ===== */
.site-footer{background:var(--primary);color:rgba(255,255,255,0.8);padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;margin-bottom:48px}
.footer-brand .logo{color:#fff;margin-bottom:16px}
.footer-brand p{font-size:0.88rem;line-height:1.8;color:rgba(255,255,255,0.6);max-width:280px}
.footer-col h4{font-size:0.95rem;font-weight:700;color:#fff;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul li a{font-size:0.88rem;color:rgba(255,255,255,0.6);transition:color var(--transition)}
.footer-col ul li a:hover{color:var(--accent)}
.footer-social{display:flex;gap:12px;margin-top:20px}
.social-btn{width:36px;height:36px;border-radius:8px;background:rgba(255,255,255,0.08);display:flex;align-items:center;justify-content:center;font-size:0.85rem;color:rgba(255,255,255,0.7);transition:all var(--transition)}
.social-btn:hover{background:var(--accent);color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.1);padding:20px 0;display:flex;justify-content:space-between;align-items:center;font-size:0.82rem;color:rgba(255,255,255,0.4)}
.footer-bottom a{color:rgba(255,255,255,0.5)}
.footer-bottom a:hover{color:var(--accent)}

/* ===== INNER PAGE ===== */
.page-hero{background:linear-gradient(135deg,var(--primary),var(--accent2));padding:80px 0 60px;text-align:center}
.page-hero h1{font-size:clamp(1.8rem,3vw,2.8rem);font-weight:800;color:#fff;margin-bottom:12px}
.page-hero p{font-size:1rem;color:rgba(255,255,255,0.75);max-width:560px;margin:0 auto}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:0.83rem;color:rgba(255,255,255,0.5);justify-content:center;margin-top:16px}
.breadcrumb a{color:rgba(255,255,255,0.6)}
.breadcrumb a:hover{color:#fff}
.breadcrumb span{color:rgba(255,255,255,0.3)}

/* ===== ABOUT PAGE ===== */
.about-intro{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.about-intro img{border-radius:16px;box-shadow:var(--shadow)}
.about-text h2{font-size:1.8rem;font-weight:800;color:var(--primary);margin-bottom:16px}
.about-text p{color:var(--text2);line-height:1.8;margin-bottom:16px}
.about-values{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:48px}
.value-item{text-align:center;padding:28px 20px;background:#fff;border-radius:12px;border:1px solid var(--border)}
.value-icon{font-size:2rem;margin-bottom:12px}
.value-item h4{font-size:1rem;font-weight:700;color:var(--primary);margin-bottom:8px}
.value-item p{font-size:0.85rem;color:var(--text2)}

/* ===== VIDEO PAGE ===== */
.filter-bar{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:32px}
.filter-btn{padding:8px 20px;border-radius:24px;font-size:0.88rem;font-weight:600;border:1px solid var(--border);color:var(--text2);transition:all var(--transition);cursor:pointer;background:#fff}
.filter-btn:hover,.filter-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}

/* ===== RESPONSIVE ===== */
@media(max-width:1024px){
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .header-inner{padding:0 16px}
  .main-nav,.search-bar,.header-cta{display:none}
  .hamburger{display:flex}
  .mobile-nav{display:none;position:fixed;inset:0;background:rgba(255,255,255,0.98);z-index:200;flex-direction:column;align-items:center;justify-content:center;gap:24px}
  .mobile-nav.open{display:flex}
  .mobile-nav a{font-size:1.3rem;font-weight:600;color:var(--primary)}
  .mobile-nav .close-btn{position:absolute;top:20px;right:20px;font-size:1.5rem;cursor:pointer}
  .hero-content{grid-template-columns:1fr;gap:40px;padding:60px 16px}
  .hero-visual{display:none}
  .hero-stats{gap:20px}
  .features-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .news-grid{grid-template-columns:1fr}
  .reviews-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .about-intro{grid-template-columns:1fr}
  .about-values{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px;text-align:center}
  .video-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
  .section{padding:56px 0}
}
@media(max-width:480px){
  .hero h1{font-size:1.8rem}
  .hero-actions{flex-direction:column}
  .btn-primary,.btn-outline{text-align:center;justify-content:center}
}

/* ===== ANIMATIONS ===== */
@keyframes fadeUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
.animate-up{animation:fadeUp 0.6s ease both}
.delay-1{animation-delay:0.1s}
.delay-2{animation-delay:0.2s}
.delay-3{animation-delay:0.3s}
.delay-4{animation-delay:0.4s}

/* ===== MODAL ===== */
.modal-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.85);z-index:500;align-items:center;justify-content:center}
.modal-overlay.open{display:flex}
.modal-box{background:#000;border-radius:12px;overflow:hidden;width:90%;max-width:800px;position:relative}
.modal-close{position:absolute;top:12px;right:12px;color:#fff;font-size:1.5rem;cursor:pointer;z-index:10;background:rgba(0,0,0,0.5);width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;transition:background var(--transition)}
.modal-close:hover{background:var(--accent)}
.modal-video{width:100%;aspect-ratio:16/9;background:#111;display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,0.5);font-size:1rem}
.modal-info{padding:20px;background:#1a1a2e}
.modal-info h3{color:#fff;font-size:1.1rem;font-weight:700;margin-bottom:8px}
.modal-meta{display:flex;gap:16px;font-size:0.83rem;color:rgba(255,255,255,0.5)}

/* ===== UTILITY ===== */
.text-center{text-align:center}
.mt-8{margin-top:8px}
.mt-16{margin-top:16px}
.mt-24{margin-top:24px}
.mt-32{margin-top:32px}
.mb-16{margin-bottom:16px}
.mb-32{margin-bottom:32px}
.btn-more{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border:1px solid var(--border);border-radius:32px;font-size:0.93rem;font-weight:600;color:var(--text2);transition:all var(--transition)}
.btn-more:hover{border-color:var(--accent);color:var(--accent)}