/* ============================================================
   星烁艺雕主站 V3 · layout.css
   关于我们 / CTA联系 / 页脚(含备案) / 回到顶部 / 响应式
   ============================================================ */

/* ===== 关于我们 ===== */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.about-lead .section-tag{margin-bottom:18px}
.about-lead h2{font-size:34px;font-weight:800;line-height:1.4;margin-bottom:22px}
.about-lead h2 .hl{color:var(--primary)}
.about-lead p{font-size:16px;color:var(--text-secondary);line-height:1.95;margin-bottom:18px}
.about-pill{display:flex;flex-direction:column;gap:14px;margin:28px 0}
.about-pill .pi{display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid var(--border);border-radius:12px;padding:16px 20px;box-shadow:var(--shadow-sm)}
.about-pill .pi svg{width:23px;height:23px;stroke:var(--primary);fill:none;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0;margin-top:2px}
.about-pill .pi b{display:block;font-size:15.5px;margin-bottom:2px}
.about-pill .pi span{font-size:13.5px;color:var(--text-muted);line-height:1.6}
/* 关于视觉：错位双窗口（aw- 命名空间隔离） */
.about-visual{position:relative;height:440px}
.aw-window{position:absolute;border-radius:14px;box-shadow:var(--shadow-lg);overflow:hidden;background:#fff;border:1px solid var(--border)}
.aw-back{width:72%;height:270px;top:0;left:0;background:#fff;z-index:1;transform:rotate(-3deg)}
.aw-front{width:68%;height:288px;bottom:0;right:0;z-index:2;background:#0F3E74;transform:rotate(2deg)}
.aw-winbar{height:36px;background:#EEF3F9;display:flex;align-items:center;gap:6px;padding:0 13px}
.aw-winbar i{width:9px;height:9px;border-radius:50%}
.aw-winbar i:nth-child(1){background:#FF6058}.aw-winbar i:nth-child(2){background:#FFBD2F}.aw-winbar i:nth-child(3){background:#28C840}
.aw-back-body{padding:20px}
.aw-back-body .b1{height:15px;width:55%;background:#D7E3F4;border-radius:5px;margin-bottom:14px}
.aw-back-body .b2{height:9px;width:100%;background:#EDF1F6;border-radius:5px;margin-bottom:8px}
.aw-back-body .b3{height:9px;width:80%;background:#EDF1F6;border-radius:5px;margin-bottom:18px}
.aw-back-body .b4{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}
.aw-back-body .b4 i{height:46px;background:#F4F7FB;border:1px solid var(--border);border-radius:7px}
.aw-front-body{padding:22px}
.aw-kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:16px}
.aw-kpis div{background:rgba(255,255,255,.08);border-radius:8px;padding:11px}
.aw-kpis b{display:block;color:#7FD0FF;font-size:17px;font-weight:800}
.aw-kpis span{font-size:10.5px;color:rgba(255,255,255,.7)}
.aw-bars{height:120px;display:flex;align-items:flex-end;gap:8px;background:rgba(255,255,255,.05);border-radius:8px;padding:14px}
.aw-bars i{flex:1;border-radius:4px 4px 0 0;background:linear-gradient(180deg,#7FD0FF,#2374D9)}
.aw-badge{position:absolute;top:46%;left:2%;z-index:3;background:var(--accent);color:#fff;font-size:14px;font-weight:700;padding:12px 18px;border-radius:11px;box-shadow:0 10px 26px rgba(255,125,51,.4);animation:floaty 6s ease-in-out infinite}

/* ===== CTA 联系 ===== */
.cta{background:linear-gradient(125deg,var(--primary) 0%,var(--primary-dark) 60%,var(--primary-deep) 100%);border-radius:var(--radius-lg);padding:70px 60px;color:#fff;display:grid;grid-template-columns:1.3fr 1fr;gap:50px;align-items:center;position:relative;overflow:hidden}
.cta::before{content:'';position:absolute;width:340px;height:340px;border-radius:50%;background:rgba(255,255,255,.06);top:-150px;right:-90px}
.cta::after{content:'';position:absolute;width:220px;height:220px;border-radius:50%;background:rgba(255,125,51,.16);bottom:-110px;right:120px}
.cta-left{position:relative;z-index:2}
.cta-left h2{font-size:34px;font-weight:800;margin-bottom:16px;line-height:1.35}
.cta-left p{font-size:16.5px;opacity:.92;line-height:1.9;margin-bottom:26px;max-width:480px}
.cta-points{display:flex;gap:24px;flex-wrap:wrap}
.cta-points span{font-size:14px;display:inline-flex;align-items:center;gap:8px;opacity:.95}
.cta-points svg{width:18px;height:18px;stroke:#FFB36E;fill:none;stroke-width:2.6;stroke-linecap:round;stroke-linejoin:round}
.cta-card{background:#fff;border-radius:18px;padding:38px 32px;text-align:center;color:var(--text-main);position:relative;z-index:2;box-shadow:var(--shadow-lg)}
.cta-qr{width:172px;height:172px;margin:0 auto 18px;border-radius:14px;background:var(--bg-light) repeating-linear-gradient(45deg,#fff 0 8px,#F0F4F9 8px 16px);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:9px;border:2px dashed #C7D5E8}
.cta-qr svg{width:40px;height:40px;stroke:var(--primary);fill:none;stroke-width:1.8}
.cta-qr span{font-size:12.5px;color:var(--text-muted);padding:0 14px;line-height:1.5}
.cta-card h3{font-size:19px;font-weight:700;margin-bottom:7px}
.cta-card p{font-size:13.5px;color:var(--text-muted);line-height:1.7}
.cta-note{font-size:12px;color:rgba(255,255,255,.7);margin-top:16px;position:relative;z-index:2}

/* ===== 页脚（含备案位） ===== */
.footer{background:#0E2138;color:rgba(255,255,255,.72);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:44px;padding-bottom:44px}
.footer-brand .logo{color:#fff;display:inline-block;margin-bottom:16px}
.footer-brand .logo span{color:#5AA0F2}
.footer-brand p{font-size:14px;line-height:1.9;opacity:.8;max-width:290px}
.footer-col h4{color:#fff;font-size:15.5px;margin-bottom:18px;font-weight:700}
.footer-col li{margin-bottom:11px}
.footer-col a{font-size:14px;opacity:.8;transition:all .3s}
.footer-col a:hover{opacity:1;color:#5AA0F2;padding-left:4px}
.footer-contact li{font-size:14px;opacity:.85;margin-bottom:12px;line-height:1.7;display:flex;gap:9px;align-items:flex-start}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;text-align:center}
.footer-bottom p{font-size:13px;opacity:.62;line-height:1.9}
.footer-beian{display:inline-flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:center}
.footer-beian a{color:rgba(255,255,255,.62);transition:color .3s}
.footer-beian a:hover{color:#5AA0F2}
.footer-beian .gongan{display:inline-flex;align-items:center;gap:5px}
.footer-beian .gongan::before{content:'';width:14px;height:14px;background:rgba(255,255,255,.55);border-radius:2px;
  -webkit-mask:radial-gradient(circle at 50% 40%,transparent 2.5px,#000 3px) ;mask:radial-gradient(circle at 50% 40%,transparent 2.5px,#000 3px)}
.beian-pending{opacity:.55;font-style:normal}

/* ===== 回到顶部 ===== */
.backtop{position:fixed;right:28px;bottom:28px;width:48px;height:48px;border-radius:50%;background:var(--primary);color:#fff;border:none;font-size:20px;cursor:pointer;opacity:0;visibility:hidden;transition:all .35s;box-shadow:var(--shadow-md);z-index:900}
.backtop.show{opacity:1;visibility:visible}
.backtop:hover{background:var(--primary-dark);transform:translateY(-3px)}

/* ===== 响应式 ===== */
@media(max-width:1024px){
  .container{padding:0 28px}
  .section{padding:72px 0}
  .section-title{font-size:31px}
  .nav{padding:14px 28px}.nav.scrolled{padding:10px 28px}
  .nav-links{position:fixed;top:64px;right:0;width:260px;height:calc(100vh - 64px);background:#fff;flex-direction:column;align-items:flex-start;padding:30px 28px;gap:22px;box-shadow:-8px 0 30px rgba(16,40,80,.12);transform:translateX(100%);transition:transform .35s;z-index:999}
  .nav-links.open{transform:translateX(0)}
  .nav-toggle{display:block}
  .hero{min-height:auto;padding:120px 0 60px}
  .hero::before{background:linear-gradient(180deg,rgba(255,255,255,.95) 0%,rgba(255,255,255,.82) 55%,rgba(255,255,255,.6) 100%)}
  .hero-title{font-size:38px}
  .trust-grid{grid-template-columns:repeat(2,1fr)}
  .trust-item:nth-child(2)::after{display:none}
  .svc-grid,.svc-grid.flip{grid-template-columns:1fr}
  .svc-grid.flip .svc-visual{order:0}
  .svc-text,.svc-grid.flip .svc-text{padding:52px 0 8px}
  .svc-visual{padding:30px 0 60px;min-height:auto}
  .cap-tabs{grid-template-columns:repeat(2,1fr)}
  .cap-panel.active{grid-template-columns:1fr}
  .cap-demo{border-left:none;border-top:1px solid var(--border)}
  .ind-grid,.adv-grid,.testi-grid{grid-template-columns:repeat(2,1fr)}
  .flow-grid{grid-template-columns:repeat(2,1fr);gap:34px 10px}
  .flow-step::after{display:none!important}
  .about-grid{grid-template-columns:1fr;gap:48px}
  .about-visual{height:380px;max-width:440px;margin:0 auto}
  .cta{grid-template-columns:1fr;padding:48px 34px;gap:34px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
}
@media(max-width:640px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .section-title{font-size:26px}
  .hero-title{font-size:30px}
  .hero-subtitle{font-size:16px}
  .hero-stats{gap:26px;flex-wrap:wrap}
  .stat-num{font-size:32px}
  .trust-grid{grid-template-columns:1fr 1fr}
  .trust-item{padding:30px 14px}
  .trust-num{font-size:32px}
  .trust-item::after{display:none!important}
  .svc-points{grid-template-columns:1fr}
  .cap-tabs{grid-template-columns:1fr}
  .cap-info{padding:32px 26px}
  .ind-grid,.adv-grid,.testi-grid,.case-grid{grid-template-columns:1fr}
  .flow-grid{grid-template-columns:1fr}
  .case-cover{height:210px}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .cta{padding:40px 24px}
  .cta-left h2{font-size:26px}
  .about-visual{height:320px}
  .aw-front{height:240px}
  .btn{padding:14px 28px}
}