*{margin:0;padding:0;box-sizing:border-box}
:root{
  --brand:#14477e;--brand-mid:#1a5fa8;--brand-light:#e8f0f9;--brand-accent:#2d7be8;
  --green:#0d622b;--green-mid:#0f7a35;--green-light:#e6f4ec;
  --bg:#ffffff;--bg2:#f7f9fc;--bg3:#f0f4f8;
  --text:#0f172a;--muted:#64748b;--dim:#94a3b8;
  --border:#e2e8f0;--border2:#cbd5e1
}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);width:100%}

/* ── 导航 ── */
.site-nav{display:flex;align-items:center;justify-content:space-between;padding:0 48px;height:68px;border-bottom:1px solid var(--border);background:rgba(255,255,255,0.95);backdrop-filter:blur(10px);position:sticky;top:0;z-index:100}
.nav-logo{display:flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0}
.logo-mark{width:34px;height:34px;border-radius:7px;background:var(--brand);display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;color:#fff}
.logo-text{font-size:17px;font-weight:600;color:var(--text)}
.nav-links{display:flex;gap:32px}
.nav-links a{font-size:15px;font-weight:500;color:var(--muted);text-decoration:none;transition:color 0.2s}
.nav-links a:hover{color:var(--text)}
.nav-btns{display:flex;gap:10px;align-items:center;flex-shrink:0}
.nav-ghost{font-size:15px;font-weight:500;color:var(--muted);text-decoration:none;padding:8px 18px;border:1px solid var(--border2);border-radius:7px;white-space:nowrap}
.nav-primary{font-size:15px;color:#fff;background:var(--brand);text-decoration:none;padding:9px 20px;border-radius:7px;font-weight:600;white-space:nowrap}

/* ── Hero ── */
.hero{position:relative;overflow:hidden;min-height:600px;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;padding:88px 48px 0}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;display:block}
.hero-overlay{position:absolute;inset:0;background:rgba(255,255,255,0.82);z-index:1}
.hero-content{position:relative;z-index:2;text-align:center;width:100%}
.hero-eyebrow{display:inline-flex;align-items:center;background:var(--brand-light);color:var(--brand);font-size:13px;font-weight:600;padding:6px 16px;border-radius:20px;margin-bottom:32px;letter-spacing:0.5px}
.hero h1{font-size:72px;font-weight:700;line-height:1.1;color:var(--text);max-width:720px;margin:0 auto 24px;letter-spacing:-2px}
.hero h1 span{color:var(--brand)}
.hero-p{font-size:20px;font-weight:400;color:var(--muted);line-height:1.75;max-width:520px;margin:0 auto 52px}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:64px}
.btn-brand{background:var(--brand);color:#fff;font-size:16px;font-weight:600;padding:15px 36px;border-radius:10px;text-decoration:none}
.btn-outline{border:2px solid var(--border2);color:var(--text);font-size:16px;font-weight:600;padding:15px 36px;border-radius:10px;text-decoration:none}
.hero-screen{width:100%;max-width:800px;margin:0 auto;height:240px;border-radius:16px 16px 0 0;overflow:hidden;border:1px solid var(--border);border-bottom:none;position:relative;z-index:2}
.hero-screen img{width:100%;height:100%;object-fit:cover;object-position:top;display:block}

/* ── 产品区 ── */
.products-section{position:relative;overflow:hidden;padding:96px 48px}
.products-bg{position:absolute;inset:0;z-index:0}
.products-bg img{width:100%;height:100%;object-fit:cover;display:block}
.products-overlay{position:absolute;inset:0;background:rgba(247,249,252,0.90);z-index:1}
.products-content{position:relative;z-index:2}
.sec-eyebrow{font-size:13px;letter-spacing:3px;color:var(--brand);text-transform:uppercase;margin-bottom:16px;font-weight:600}
.sec-title{font-size:48px;font-weight:700;color:var(--text);letter-spacing:-1.5px;margin-bottom:16px;line-height:1.1}
.sec-sub{font-size:18px;font-weight:400;color:var(--muted);line-height:1.75;max-width:520px}
.prod-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:56px}
.pc{border-radius:20px;border:1px solid var(--border);background:#fff;overflow:hidden;display:flex;flex-direction:column;transition:box-shadow 0.2s}
.pc:hover{box-shadow:0 12px 40px rgba(0,0,0,0.10)}
.pc-head{height:200px;position:relative;overflow:hidden}
.pc-head img{width:100%;height:100%;object-fit:cover;display:block}
.pc-head-overlay{position:absolute;inset:0;background:rgba(255,255,255,0.55)}
.pc-head-content{position:absolute;inset:0;padding:28px 32px;display:flex;flex-direction:column;justify-content:flex-end}
.pc-badge{display:inline-flex;font-size:12px;font-weight:600;padding:5px 13px;border-radius:20px;margin-bottom:10px;width:fit-content}
.badge-blue{background:rgba(20,71,126,0.15);color:var(--brand)}
.badge-green{background:rgba(13,98,43,0.15);color:var(--green)}
.pc-name{font-size:30px;font-weight:700;color:var(--text)}
.pc-en{font-size:11px;letter-spacing:2px;color:var(--muted);text-transform:uppercase;font-weight:500}
.pc-body{padding:32px;flex:1;display:flex;flex-direction:column}
.pc-desc{font-size:16px;font-weight:400;color:var(--muted);line-height:1.85;margin-bottom:24px}
.pc-tags{display:flex;flex-wrap:wrap;gap:8px;height:60px;align-content:flex-start;overflow:hidden;margin-bottom:28px}
.ptag{font-size:13px;font-weight:500;color:var(--muted);background:var(--bg2);padding:6px 14px;border-radius:20px;border:1px solid var(--border);white-space:nowrap}
.pc-actions{display:flex;gap:12px;align-items:center;margin-top:auto}
.pc-btn-blue{background:var(--brand);color:#fff;font-size:15px;font-weight:600;padding:11px 24px;border-radius:8px;text-decoration:none}
.pc-btn-green{background:var(--green);color:#fff;font-size:15px;font-weight:600;padding:11px 24px;border-radius:8px;text-decoration:none}
.pc-link{font-size:15px;font-weight:500;color:var(--muted);text-decoration:none}

/* ── 图文特性区 ── */
.feature-row{position:relative;overflow:hidden}
.feature-bg{position:absolute;inset:0;z-index:0}
.feature-bg img{width:100%;height:100%;object-fit:cover;display:block}
.feature-overlay{position:absolute;inset:0;z-index:1}
.feature-inner{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center;padding:96px 48px}
.feature-row.reverse .feature-inner{direction:rtl}
.feature-row.reverse .feature-inner>*{direction:ltr}
.feat-visual{border-radius:16px;overflow:hidden;height:300px;border:1px solid var(--border);box-shadow:0 8px 32px rgba(0,0,0,0.10)}
.feat-visual img{width:100%;height:100%;object-fit:cover;display:block}
.feat-eyebrow{font-size:12px;letter-spacing:2.5px;text-transform:uppercase;margin-bottom:14px;font-weight:600}
.feat-title{font-size:36px;font-weight:700;color:var(--text);letter-spacing:-0.8px;margin-bottom:16px;line-height:1.25}
.feat-desc{font-size:16px;font-weight:400;color:var(--muted);line-height:1.85;margin-bottom:28px}
.feat-points{display:flex;flex-direction:column;gap:12px}
.feat-point{display:flex;align-items:flex-start;gap:12px;font-size:15px;font-weight:400;color:var(--muted)}
.feat-dot{width:7px;height:7px;border-radius:50%;flex-shrink:0;margin-top:7px}

/* ── 新闻资讯 ── */
.news-section{position:relative;overflow:hidden;padding:96px 48px}
.news-bg{position:absolute;inset:0;z-index:0}
.news-bg img{width:100%;height:100%;object-fit:cover;display:block}
.news-overlay{position:absolute;inset:0;background:rgba(255,255,255,0.88);z-index:1}
.news-content{position:relative;z-index:2}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:52px}
.nc{background:rgba(255,255,255,0.92);backdrop-filter:blur(8px);border:1px solid var(--border);border-radius:16px;padding:32px;display:flex;flex-direction:column;gap:14px;cursor:pointer;transition:box-shadow 0.2s}
.nc:hover{box-shadow:0 4px 24px rgba(0,0,0,0.09)}
.nc-tag{font-size:12px;letter-spacing:1.5px;color:var(--brand);text-transform:uppercase;font-weight:600}
.nc-title{font-size:17px;font-weight:600;color:var(--text);line-height:1.6;flex:1}
.nc-meta{font-size:13px;color:var(--dim);display:flex;align-items:center;justify-content:space-between}
.nc-link{font-size:13px;font-weight:500;color:var(--brand);text-decoration:none}

/* ── 服务与支持 ── */
.support-section{position:relative;overflow:hidden;padding:96px 48px}
.support-bg{position:absolute;inset:0;z-index:0}
.support-bg img{width:100%;height:100%;object-fit:cover;display:block}
.support-overlay{position:absolute;inset:0;background:rgba(247,249,252,0.90);z-index:1}
.support-content{position:relative;z-index:2}
.support-row{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:52px;max-width:600px}
.sc{background:rgba(255,255,255,0.9);border:1px solid var(--border);border-radius:16px;padding:32px}
.sc-icon{width:44px;height:44px;background:var(--brand-light);border-radius:10px;display:flex;align-items:center;justify-content:center;margin-bottom:16px;color:var(--brand);font-size:20px}
.sc-title{font-size:18px;font-weight:600;color:var(--text);margin-bottom:10px}
.sc-desc{font-size:15px;font-weight:400;color:var(--muted);line-height:1.75}

/* ── 下载 CTA ── */
.download{padding:96px 48px;background:var(--bg2);text-align:center;border-top:1px solid var(--border)}
.dl-h{font-size:48px;font-weight:700;color:var(--text);letter-spacing:-1.5px;margin-bottom:16px;line-height:1.1}
.dl-p{font-size:18px;font-weight:400;color:var(--muted);margin-bottom:56px}
.dl-cards{display:grid;grid-template-columns:1fr 1fr;gap:20px;max-width:660px;margin:0 auto}
.dl-card{border-radius:18px;padding:36px;border:1px solid var(--border);text-align:left;background:#fff;transition:box-shadow 0.2s}
.dl-card:hover{box-shadow:0 4px 24px rgba(0,0,0,0.09)}
.dl-card-stripe{height:4px;border-radius:3px;margin-bottom:22px}
.dl-card-name{font-size:22px;font-weight:700;color:var(--text);margin-bottom:8px}
.dl-card-sub{font-size:15px;font-weight:400;color:var(--muted);margin-bottom:28px;line-height:1.7}
.dl-card-btn{font-size:15px;font-weight:600;padding:12px 24px;border-radius:9px;text-decoration:none;display:inline-block}
.dcb-blue{background:var(--brand);color:#fff}
.dcb-green{background:var(--green);color:#fff}

/* ── 页脚 ── */
.site-footer{padding:40px 48px;border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;background:#fff}
.footer-left{display:flex;align-items:center;gap:10px}
.footer-copy{font-size:14px;font-weight:400;color:var(--dim)}

/* ── 响应式 ── */
@media(max-width:1024px){
  .site-nav{padding:0 24px}
  .hero{padding:72px 24px 0}
  .hero h1{font-size:56px}
  .products-section,.news-section,.support-section{padding:72px 24px}
  .feature-inner{padding:72px 24px;gap:48px}
  .download{padding:72px 24px}
  .site-footer{padding:32px 24px}
}
@media(max-width:768px){
  .site-nav{padding:0 16px;height:60px}
  .nav-links{display:none}
  .hero{padding:56px 16px 0}
  .hero h1{font-size:40px;letter-spacing:-1px}
  .hero-p{font-size:17px}
  .hero-actions{flex-direction:column;align-items:center}
  .btn-brand,.btn-outline{width:100%;max-width:280px;text-align:center}
  .products-section{padding:56px 16px}
  .sec-title{font-size:34px;letter-spacing:-1px}
  .sec-sub{font-size:16px}
  .prod-grid{grid-template-columns:1fr}
  .feature-inner{grid-template-columns:1fr;padding:56px 16px;gap:32px}
  .feature-row.reverse .feature-inner{direction:ltr}
  .feat-title{font-size:28px}
  .feat-desc{font-size:15px}
  .news-section,.support-section{padding:56px 16px}
  .news-grid{grid-template-columns:1fr}
  .support-row{grid-template-columns:1fr;max-width:100%}
  .download{padding:56px 16px}
  .dl-h{font-size:34px}
  .dl-p{font-size:16px}
  .dl-cards{grid-template-columns:1fr}
  .site-footer{flex-direction:column;gap:12px;text-align:center;padding:28px 16px}
}
/* ── 在线客服卡片点击态 ── */
.sc-clickable{cursor:pointer;transition:box-shadow 0.2s,border-color 0.2s}
.sc-clickable:hover{box-shadow:0 4px 20px rgba(20,71,126,0.12);border-color:var(--brand-light)}
.sc-hint{font-size:13px;font-weight:600;color:var(--brand);margin-top:14px}

/* ── 客服弹窗遮罩 ── */
.contact-mask{position:fixed;inset:0;background:rgba(15,23,42,0.45);z-index:200;opacity:0;pointer-events:none;transition:opacity 0.25s}
.contact-mask.active{opacity:1;pointer-events:auto}

/* ── 客服弹窗主体 ── */
.contact-modal{position:fixed;top:50%;left:50%;transform:translate(-50%,-48%);z-index:201;width:100%;max-width:420px;background:#fff;border-radius:20px;border:1px solid var(--border);box-shadow:0 24px 64px rgba(15,23,42,0.16);opacity:0;pointer-events:none;transition:opacity 0.25s,transform 0.25s}
.contact-modal.active{opacity:1;pointer-events:auto;transform:translate(-50%,-50%)}

.contact-modal-header{display:flex;align-items:center;justify-content:space-between;padding:24px 28px 0}
.contact-modal-title{font-size:18px;font-weight:700;color:var(--text)}
.contact-modal-close{background:none;border:none;cursor:pointer;color:var(--dim);padding:4px;border-radius:6px;display:flex;align-items:center;justify-content:center;transition:background 0.15s}
.contact-modal-close:hover{background:var(--bg2);color:var(--text)}

.contact-modal-body{padding:24px 28px 32px}

.contact-item{display:flex;align-items:flex-start;gap:16px}
.contact-item-icon{width:44px;height:44px;border-radius:10px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.contact-icon-qr{background:var(--brand-light);color:var(--brand)}
.contact-icon-phone{background:#e6f4ec;color:var(--green)}
.contact-icon-mail{background:#fff3e6;color:#b45309}
.contact-item-content{flex:1}
.contact-item-label{font-size:12px;font-weight:600;color:var(--dim);letter-spacing:0.5px;text-transform:uppercase;margin-bottom:8px}
.contact-item-value{font-size:16px;font-weight:600;color:var(--text);text-decoration:none;transition:color 0.2s}
.contact-item-value:hover{color:var(--brand)}

.contact-qr{margin-top:4px}
.contact-qr img{width:140px;height:140px;border-radius:10px;border:1px solid var(--border);display:block}

.contact-divider{height:1px;background:var(--border);margin:20px 0}

@media(max-width:480px){
  .contact-modal{max-width:calc(100% - 32px)}
  .contact-modal-header{padding:20px 20px 0}
  .contact-modal-body{padding:20px 20px 28px}
}
/* ── 复制按钮 ── */
.contact-item-row{display:flex;align-items:center;gap:10px}
.copy-btn{background:none;border:1px solid var(--border);border-radius:6px;padding:5px 7px;cursor:pointer;color:var(--dim);display:flex;align-items:center;justify-content:center;transition:background 0.15s,color 0.15s,border-color 0.15s;flex-shrink:0}
.copy-btn:hover{background:var(--bg2);color:var(--text);border-color:var(--border2)}
.copy-btn-success{background:var(--green-light) !important;color:var(--green) !important;border-color:rgba(13,98,43,0.2) !important}