:root{
  --primary:#E84C3D;--primary-dark:#385d8a;--secondary:#66bb6a;
  --light:#f8f9fa;--dark:#333;--gray:#6c757d;--light-gray:#e9ecef;
  --transition:all .3s ease;--shadow:0 5px 15px rgba(0,0,0,.08);--radius:8px;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Inter','Segoe UI',sans-serif;line-height:1.6;color:var(--dark);background:#fff;overflow-x:hidden}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
a{color:var(--primary)}

/* header */
header{padding:16px 0;background:#fff;box-shadow:0 2px 10px rgba(0,0,0,.05);position:sticky;top:0;z-index:1000}
.header-content{display:flex;justify-content:space-between;align-items:center;gap:16px}
.logo{display:flex;align-items:center;font-weight:700;font-size:22px;color:var(--primary);text-decoration:none}
.logo img{width:45px;height:45px;margin-right:8px;border-radius:8px}
.nav-links{display:flex;list-style:none;align-items:center;flex-wrap:wrap}
.nav-links li{margin-left:24px}
.nav-links a{text-decoration:none;color:var(--dark);font-weight:500;transition:var(--transition);position:relative}
.nav-links a:hover{color:var(--primary)}
.nav-back{color:var(--dark);text-decoration:none;margin-right:16px;font-weight:500}
.mobile-menu-btn{display:none;background:none;border:none;font-size:24px;color:var(--primary);cursor:pointer}

/* buttons */
.btn{padding:14px 28px;border-radius:var(--radius);font-weight:600;text-decoration:none;display:inline-block;transition:var(--transition);cursor:pointer;border:none;font-size:16px;text-align:center}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-3px);box-shadow:var(--shadow)}
.btn-secondary{background:transparent;color:var(--primary);border:2px solid var(--primary)}
.btn-secondary:hover{background:rgba(232,76,61,.05);transform:translateY(-3px)}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:6px}

/* hero 首页 */
.hero{padding:90px 0;background:linear-gradient(135deg,#f5f7fa 0%,#e4e8f0 100%);text-align:center}
.hero h1{font-size:44px;font-weight:700;margin-bottom:18px;color:var(--dark);line-height:1.25}
.hero h1 .h1-brand{display:block;font-size:20px;font-weight:600;color:var(--primary);margin-top:14px;letter-spacing:.5px}
.hero p{font-size:18px;color:var(--gray);max-width:720px;margin:0 auto 32px}
.cta-buttons{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}

/* section 通用 */
.section-title{text-align:center;margin-bottom:50px}
.section-title h2{font-size:34px;font-weight:700;margin-bottom:12px;color:var(--dark)}
.section-title p{font-size:17px;color:var(--gray);max-width:640px;margin:0 auto}
.features,.screenshots,.download,.pricing,.scenarios{padding:90px 0}
.features,.screenshots,.download{background:#fff}
.scenarios,.pricing{background:#f8f9fa}

/* feature cards */
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:30px}
.feature-card{background:#fff;border-radius:var(--radius);padding:36px 26px;box-shadow:var(--shadow);transition:var(--transition);text-align:center}
.feature-card:hover{transform:translateY(-8px);box-shadow:0 15px 30px rgba(0,0,0,.1)}
.feature-icon{width:68px;height:68px;background:rgba(232,76,61,.1);border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 22px}
.feature-icon i{font-size:28px;color:var(--primary)}
.feature-card h3{font-size:20px;font-weight:600;margin-bottom:12px;display:flex;justify-content:center;align-items:center;gap:6px}
.feature-card p{color:var(--gray);font-size:15px}
.badge{font-size:12px;background:#ff9800;color:#fff;padding:2px 6px;border-radius:4px;font-weight:500;white-space:nowrap}

/* scenes */
.scenarios-grid{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;max-width:1050px;margin:0 auto}
.scene-tag{display:inline-flex;align-items:center;gap:8px;padding:11px 20px;background:#fff;border:1px solid var(--light-gray);border-radius:30px;font-size:15px;color:var(--dark);font-weight:500;transition:var(--transition);box-shadow:0 2px 5px rgba(0,0,0,.02);text-decoration:none}
.scene-tag i{color:var(--primary);font-size:15px}
.scene-tag:hover{transform:translateY(-3px);box-shadow:0 8px 20px rgba(0,0,0,.08);border-color:var(--primary);color:var(--primary)}
a.scene-tag{cursor:pointer}

/* screenshots */
.screenshot-slider{display:flex;overflow-x:auto;gap:26px;padding:16px 8px;scrollbar-width:thin;scrollbar-color:var(--primary) #f1f1f1}
.screenshot-slider::-webkit-scrollbar{height:8px}
.screenshot-slider::-webkit-scrollbar-track{background:#f1f1f1;border-radius:10px}
.screenshot-slider::-webkit-scrollbar-thumb{background:var(--primary);border-radius:10px}
.screenshot{flex:0 0 auto;width:240px;border-radius:20px;overflow:hidden;box-shadow:0 10px 25px rgba(0,0,0,.1);transition:var(--transition)}
.screenshot:hover{transform:scale(1.04)}
.screenshot img{width:100%;height:auto;display:block}

/* pricing */
.pricing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:26px;align-items:stretch}
.pricing-card{background:#fff;border:1px solid var(--light-gray);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);transition:var(--transition);display:flex;flex-direction:column}
.pricing-card:hover{transform:translateY(-5px);box-shadow:0 15px 30px rgba(0,0,0,.1);border-color:rgba(232,76,61,.3)}
.pricing-card.popular{border:2px solid var(--primary);position:relative}
.pricing-card.popular::before{content:'推荐';position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--primary);color:#fff;padding:4px 12px;font-size:12px;border-radius:12px;font-weight:600}
.pricing-header{text-align:center;margin-bottom:18px;padding-bottom:14px;border-bottom:1px solid var(--light-gray)}
.pricing-header h3{font-size:19px;font-weight:600}
.platform-compare{display:grid;grid-template-columns:1fr 1fr;gap:14px;flex-grow:1;margin-bottom:22px;position:relative}
.platform-compare::after{content:'';position:absolute;top:10%;bottom:10%;left:50%;width:1px;background:var(--light-gray)}
.platform-col{display:flex;flex-direction:column;align-items:center;text-align:center;padding:8px 4px}
.platform-tag{font-size:13px;font-weight:600;padding:4px 10px;border-radius:12px;margin-bottom:12px;display:inline-flex;align-items:center;gap:5px}
.platform-tag.android{background:#e8f5e9;color:#2e7d32}
.platform-tag.ios{background:#f5f5f7;color:#333}
.price-main{font-size:25px;font-weight:700;color:var(--primary);line-height:1.2;margin-bottom:4px}
.price-main span{font-size:13px;font-weight:500}
.price-sub{font-size:13px;color:var(--gray);margin-top:4px}
.ios-options{list-style:none;width:100%;font-size:14px}
.ios-options li{display:flex;justify-content:space-between;padding:6px 0;border-bottom:1px dashed var(--light-gray)}
.ios-options li:last-child{border-bottom:none}
.ios-options li span{color:var(--primary);font-weight:600}
.pricing-card .btn{width:100%;margin-top:auto}
.pricing-notice{margin-top:36px;background:#fcf9f9;border-left:4px solid var(--primary);border-radius:0 var(--radius) var(--radius) 0;padding:18px 22px;display:flex;align-items:flex-start;gap:14px;box-shadow:0 2px 10px rgba(0,0,0,.03)}
.pricing-notice .notice-icon{color:var(--primary);font-size:22px;margin-top:2px}
.pricing-notice .notice-content p{font-size:15px;color:var(--gray);margin-bottom:8px;line-height:1.7}
.pricing-notice .notice-content p:last-child{margin-bottom:0}
.pricing-notice strong{color:var(--dark);font-weight:600}
.wechat-icon{color:#07C160;margin-right:5px}
.gift-icon{color:#FFB800;margin-right:5px}

/* download */
.download{text-align:center}
.download-content{max-width:760px;margin:0 auto}
.download h2{font-size:34px;font-weight:700;margin-bottom:16px}
.download p{font-size:17px;color:var(--gray);margin-bottom:36px}
.download-buttons{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}
.download-btn{display:flex;align-items:center;padding:14px 22px;background:var(--dark);color:#fff;border-radius:var(--radius);text-decoration:none;transition:var(--transition);min-width:170px}
.download-btn:hover{transform:translateY(-3px);box-shadow:var(--shadow);background:#444}
.download-btn i{font-size:26px;margin-right:12px}
.download-btn span{display:flex;flex-direction:column;text-align:left;font-weight:600}
.wechat-wrapper{position:relative;display:flex}
.wechat-popup{position:absolute;bottom:calc(100% + 14px);left:50%;transform:translateX(-50%) translateY(10px);background:#fff;padding:12px;border-radius:var(--radius);box-shadow:0 12px 30px rgba(0,0,0,.18);opacity:0;visibility:hidden;pointer-events:none;transition:var(--transition);z-index:1200}
.wechat-popup::after{content:'';position:absolute;top:100%;left:50%;transform:translateX(-50%);border:8px solid transparent;border-top-color:#fff}
.wechat-popup img{display:block;width:170px;height:170px;object-fit:contain;border-radius:6px}
.wechat-popup p{margin-top:8px;font-size:12px;color:var(--gray);text-align:center;white-space:nowrap}
.wechat-wrapper:hover .wechat-popup,.wechat-wrapper.show .wechat-popup{opacity:1;visibility:visible;pointer-events:auto;transform:translateX(-50%) translateY(0)}

/* footer */
footer{background:var(--dark);color:#fff;padding:56px 0 26px}
.footer-content{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:36px;margin-bottom:36px}
.footer-column h3{font-size:18px;margin-bottom:22px;position:relative;padding-bottom:10px}
.footer-column h3::after{content:'';position:absolute;bottom:0;left:0;width:40px;height:2px;background:var(--primary)}
.footer-column p{color:#aaa;font-size:14px;line-height:1.8}
.footer-links{list-style:none}
.footer-links li{margin-bottom:10px}
.footer-links a{color:#aaa;text-decoration:none;transition:var(--transition);font-size:14px}
.footer-links a:hover{color:#fff;padding-left:5px}
.copyright{text-align:center;padding-top:26px;border-top:1px solid rgba(255,255,255,.1);color:#aaa;font-size:13px}
.copyright a{color:#fff}

/* ===== 专题页专用 ===== */
.breadcrumb{padding:16px 0;font-size:13px;color:var(--gray);background:#fff}
.breadcrumb a{color:var(--primary);text-decoration:none}
.breadcrumb span{margin:0 6px;color:#bbb}
.page-hero{padding:70px 0 60px;background:linear-gradient(135deg,#f5f7fa 0%,#e4e8f0 100%);text-align:center}
.page-hero h1{font-size:36px;font-weight:700;line-height:1.3;margin-bottom:16px;color:var(--dark)}
.page-hero h1 .h1-brand{display:block;font-size:18px;color:var(--primary);font-weight:600;margin-top:12px}
.page-hero .lead{font-size:17px;color:var(--gray);max-width:760px;margin:0 auto 28px}
.article-section{padding:60px 0}
.article-section:nth-of-type(even){background:#f8f9fa}
.article-content{max-width:840px;margin:0 auto}
.article-content h2{font-size:26px;margin:36px 0 14px;color:var(--dark)}
.article-content h2:first-child{margin-top:0}
.article-content h3{font-size:19px;margin:26px 0 10px;color:var(--dark)}
.article-content p{margin-bottom:15px;color:#444;line-height:1.85;font-size:16px}
.article-content ul{margin:0 0 16px 22px}
.article-content li{margin-bottom:8px;color:#444;line-height:1.75}
.faq-item{border:1px solid var(--light-gray);border-radius:var(--radius);margin-bottom:12px;padding:18px 22px;background:#fff}
.faq-q{font-weight:600;font-size:16px;margin-bottom:8px;color:var(--dark)}
.faq-a{color:var(--gray);font-size:15px;line-height:1.75}
.related-scenes{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.scene-link{display:inline-flex;align-items:center;gap:6px;padding:9px 16px;background:#fff;border:1px solid var(--light-gray);border-radius:24px;font-size:14px;color:var(--dark);text-decoration:none;transition:var(--transition)}
.scene-link:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}

/* 微信提示弹层 */
.wechat-tip-overlay{position:fixed;inset:0;background:rgba(0,0,0,.85);z-index:10000;display:none;flex-direction:column;align-items:flex-end;padding:20px 30px;color:#fff;text-align:right}
.wechat-tip-arrow{font-size:58px;margin-right:10px;animation:floatUpDown 1.5s infinite}
.wechat-tip-text{margin-top:18px;font-size:17px;line-height:1.8;margin-right:10px;background:rgba(255,255,255,.1);padding:14px 18px;border-radius:8px}
.wechat-tip-text strong{color:#ffd700}
@keyframes floatUpDown{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}

/* 响应式 */
@media(max-width:992px){
  .hero h1{font-size:38px}
  .section-title h2,.download h2{font-size:30px}
  .page-hero h1{font-size:30px}
}
@media(max-width:768px){
  .nav-links{display:none}
  .mobile-menu-btn{display:block}
  .hero{padding:64px 0}
  .hero h1{font-size:30px}
  .hero h1 .h1-brand{font-size:16px}
  .hero p{font-size:16px}
  .cta-buttons,.download-buttons{flex-direction:column;align-items:center}
  .btn,.download-btn{width:100%;max-width:300px;justify-content:center}
  .wechat-wrapper{width:100%;max-width:300px}
  .pricing-grid{grid-template-columns:1fr}
  .pricing-notice{flex-direction:column;gap:10px;padding:18px}
  .scene-tag{padding:9px 15px;font-size:14px}
  .features,.screenshots,.download,.pricing,.scenarios{padding:64px 0}
  .page-hero{padding:52px 0 44px}
  .page-hero h1{font-size:26px}
  .article-section{padding:44px 0}
}
@media(max-width:576px){
  .hero h1{font-size:26px}
  .section-title h2,.download h2{font-size:26px}
  .page-hero h1{font-size:23px}
  .article-content h2{font-size:22px}
}