/* ══════════════════════════════════════════════
   活跃科技 ACTIVEINNO · 官网改版设计
   设计语言：深海军蓝 × 电光蓝 × 青色光流
   ══════════════════════════════════════════════ */
:root{
  --navy-950:#060D1A;
  --navy-900:#0A1428;
  --navy-800:#0F1E38;
  --navy-700:#16294A;
  --blue-600:#2563EB;
  --blue-500:#3B82F6;
  --cyan-400:#22D3EE;
  --violet-500:#8B5CF6;
  --ink:#0F1E38;
  --muted:#5B6B85;
  --line:#E4EAF3;
  --bg:#FFFFFF;
  --bg-soft:#F5F8FC;
  --card:#FFFFFF;
  --grad:linear-gradient(100deg,#3B82F6 10%,#22D3EE 90%);
  --grad-soft:linear-gradient(100deg,rgba(59,130,246,.12),rgba(34,211,238,.12));
  --radius:18px;
  --radius-lg:26px;
  --shadow:0 18px 50px -18px rgba(15,30,56,.18);
  --shadow-lg:0 30px 80px -24px rgba(37,99,235,.35);
  --font:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{width:min(1200px,92%);margin:0 auto}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.grad-light{background:linear-gradient(100deg,#93C5FD,#67E8F9);-webkit-background-clip:text;background-clip:text;color:transparent}
.center{text-align:center;margin-top:44px}

/* ── 按钮 ── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;border-radius:999px;cursor:pointer;border:0;font-family:var(--font);transition:transform .25s,box-shadow .25s,background .25s;white-space:nowrap}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 12px 28px -10px rgba(37,99,235,.55)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 36px -10px rgba(37,99,235,.6)}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.28);backdrop-filter:blur(6px)}
.btn-ghost:hover{background:rgba(255,255,255,.16);transform:translateY(-2px)}
.btn-lg{padding:15px 38px;font-size:17px}
.btn-sm{padding:10px 24px;font-size:14px}
.btn-block{width:100%}

/* ── 导航 ── */
.nav{position:fixed;inset:0 0 auto 0;z-index:100;transition:background .3s,box-shadow .3s,backdrop-filter .3s}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:11px}
.brand-logo{display:block;width:160px;height:auto}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:19px;font-weight:900;letter-spacing:2px}
.brand-text em{font-style:normal;font-size:10px;letter-spacing:3.5px;color:var(--muted);font-weight:500}
.nav .brand-text strong,.nav .brand-text em{color:#fff}
.nav-links{display:flex;gap:34px}
.nav-links a{font-size:15px;font-weight:500;color:rgba(255,255,255,.82);position:relative;padding:6px 0}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--grad);border-radius:2px;transition:width .3s}
.nav-links a:hover{color:#fff}
.nav-links a:hover::after{width:100%}
.nav.scrolled{background:rgba(255,255,255,.9);backdrop-filter:blur(14px);box-shadow:0 6px 24px -12px rgba(15,30,56,.18)}
.nav.scrolled .brand-logo{filter:brightness(0)}
.nav.scrolled .brand-text strong{color:var(--ink)}
.nav.scrolled .nav-links a{color:var(--muted)}
.nav.scrolled .nav-links a:hover{color:var(--ink)}
.nav-cta{display:flex;align-items:center;gap:14px}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:2.5px;border-radius:2px;background:#fff;transition:.3s}
.nav.scrolled .nav-toggle span{background:var(--ink)}
.mobile-menu{display:none}

/* ── Hero ── */
.hero{position:relative;background:var(--navy-950);color:#fff;overflow:hidden;padding:150px 0 0}
.hero-bg{position:absolute;inset:0;background:url("../assets/img/hero-visual.jpg") center/cover no-repeat;opacity:.5}
.hero-glow{position:absolute;inset:0;background:radial-gradient(900px 480px at 18% 30%,rgba(59,130,246,.35),transparent 60%),radial-gradient(700px 420px at 85% 70%,rgba(34,211,238,.22),transparent 60%),linear-gradient(180deg,rgba(6,13,26,.55),rgba(6,13,26,.88) 78%,var(--navy-950))}
.hero-inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;padding-bottom:70px}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:14px;font-weight:500;color:#BFDBFE;background:rgba(59,130,246,.14);border:1px solid rgba(147,197,253,.3);padding:8px 18px;border-radius:999px;margin-bottom:26px}
.eyebrow .dot{width:8px;height:8px;border-radius:50%;background:var(--cyan-400);box-shadow:0 0 12px var(--cyan-400);animation:pulse 2s infinite}
@keyframes pulse{50%{opacity:.4}}
.hero h1{font-size:clamp(44px,6vw,76px);font-weight:900;line-height:1.22;letter-spacing:1px;margin-bottom:24px}
.hero-sub{font-size:18px;color:#C7D6EC;max-width:560px;margin-bottom:36px}
.hero-sub strong{color:#fff}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:48px}
.hero-stats{display:flex;gap:0;border-top:1px solid rgba(255,255,255,.14);padding-top:28px}
.hero-stats>div{flex:1}
.hero-stats>div+div{border-left:1px solid rgba(255,255,255,.14);padding-left:28px}
.hero-stats dt{font-size:34px;font-weight:900;color:#fff}
.hero-stats dd{font-size:14px;color:#93A7C4;margin:0}
.hero-media{position:relative}
.hero-media img{border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);border:1px solid rgba(147,197,253,.25)}
.hero-card{position:absolute;background:rgba(10,20,40,.72);backdrop-filter:blur(12px);border:1px solid rgba(147,197,253,.3);border-radius:16px;padding:14px 22px;box-shadow:0 16px 40px -12px rgba(0,0,0,.5)}
.hero-card .hc-num{font-size:28px;font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1.3}
.hero-card .hc-label{font-size:13px;color:#BFDBFE;margin:0}
.float-a{top:8%;left:-34px;animation:float 5s ease-in-out infinite}
.float-b{bottom:10%;right:-20px;animation:float 6s ease-in-out infinite reverse}
@keyframes float{50%{transform:translateY(-12px)}}

/* 信任条 */
.trustbar{position:relative;border-top:1px solid rgba(255,255,255,.12);background:rgba(6,13,26,.6);backdrop-filter:blur(8px);padding:26px 0 30px}
.trustbar p{text-align:center;font-size:13px;letter-spacing:4px;color:#7E93B5;margin-bottom:16px}
.trust-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:12px}
.trust-tags span{font-size:14px;color:#C7D6EC;border:1px solid rgba(255,255,255,.16);padding:8px 20px;border-radius:999px;background:rgba(255,255,255,.04)}

/* ── 通用区块 ── */
.section{padding:110px 0}
.section-alt{background:var(--bg-soft)}
.sec-head{max-width:760px;margin:0 auto 60px;text-align:center}
.kicker{display:inline-block;font-size:14px;font-weight:700;letter-spacing:6px;color:var(--blue-600);background:var(--grad-soft);padding:8px 22px;border-radius:999px;margin-bottom:20px}
.kicker-light{color:#93C5FD;background:rgba(147,197,253,.12)}
.sec-head h2{font-size:clamp(30px,4vw,44px);font-weight:900;line-height:1.4;margin-bottom:18px;letter-spacing:1px}
.sec-desc{font-size:17px;color:var(--muted);max-width:640px;margin:0 auto}
.check-list{list-style:none;display:grid;gap:12px;margin:20px 0 24px}
.check-list li{position:relative;padding-left:32px;font-size:15.5px;color:#33415C}
.check-list li::before{content:"✓";position:absolute;left:0;top:1px;width:22px;height:22px;border-radius:50%;background:var(--grad);color:#fff;font-size:13px;font-weight:900;display:flex;align-items:center;justify-content:center}
.check-list.cols-2{grid-template-columns:1fr 1fr;gap:14px 28px}
.text-link{font-weight:700;color:var(--blue-600);font-size:15.5px}
.text-link:hover{text-decoration:underline}

/* ── 服务卡片 ── */
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.service-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);transition:transform .35s,box-shadow .35s;display:flex;flex-direction:column}
.service-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.service-media{position:relative;height:210px;overflow:hidden}
.service-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.service-card:hover .service-media img{transform:scale(1.06)}
.service-tag{position:absolute;top:16px;left:16px;font-size:13px;font-weight:700;color:#fff;background:linear-gradient(100deg,#F59E0B,#EF4444);padding:6px 16px;border-radius:999px}
.tag-ai{background:linear-gradient(100deg,#8B5CF6,#3B82F6)}
.service-body{padding:32px 30px 34px;flex:1;display:flex;flex-direction:column}
.service-body h3{font-size:22px;font-weight:900;margin-bottom:12px}
.service-body>p{font-size:15.5px;color:var(--muted);margin-bottom:4px}
.service-body .text-link{margin-top:auto;padding-top:8px}
.service-card-wide{grid-column:1/-1;flex-direction:row;align-items:center;background:linear-gradient(120deg,var(--navy-900),var(--navy-700));border:0;color:#fff}
.service-card-wide .service-body h3{color:#fff}
.service-card-wide .service-body>p{color:#B9C8E2}
.service-card-wide .check-list li{color:#D6E2F5}
.ops-row{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:22px 0 26px}
.ops-row div{background:rgba(255,255,255,.06);border:1px solid rgba(147,197,253,.22);border-radius:14px;padding:18px}
.ops-row strong{display:block;font-size:16px;margin-bottom:4px}
.ops-row span{font-size:13.5px;color:#93A7C4}
.service-card-wide .text-link{color:#7DD3FC}

/* ── 数据带 ── */
.band{background:linear-gradient(120deg,#0A1428 20%,#12306B 70%,#0E7490);color:#fff;padding:72px 0;position:relative;overflow:hidden}
.band::before{content:"";position:absolute;inset:0;background:radial-gradient(600px 300px at 80% 20%,rgba(34,211,238,.25),transparent 60%)}
.band-inner{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.band-item+.band-item{border-left:1px solid rgba(255,255,255,.16)}
.band-num{font-size:52px;font-weight:900;line-height:1.2}
.band-num .count{background:linear-gradient(100deg,#93C5FD,#67E8F9);-webkit-background-clip:text;background-clip:text;color:transparent}
.band-label{font-size:14.5px;color:#B9C8E2;margin-top:10px;line-height:1.7}

/* ── 行业方案 Tabs ── */
.tabs{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-bottom:36px}
.tab{font-family:var(--font);font-size:16px;font-weight:700;color:var(--muted);background:#fff;border:1.5px solid var(--line);border-radius:999px;padding:12px 30px;cursor:pointer;transition:.3s}
.tab:hover{border-color:var(--blue-500);color:var(--blue-600)}
.tab.active{background:var(--grad);color:#fff;border-color:transparent;box-shadow:0 12px 26px -10px rgba(37,99,235,.5)}
.tab-panels{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:48px 52px;max-width:960px;margin:0 auto}
.tab-panel{display:none;animation:fadeUp .45s}
.tab-panel.active{display:block}
@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.tab-panel h3{font-size:24px;font-weight:900;margin-bottom:10px}
.tab-panel>p{color:var(--muted);font-size:16px;margin-bottom:8px}

/* ── 服务流程 ── */
.process{list-style:none;display:grid;grid-template-columns:repeat(5,1fr);gap:20px;counter-reset:step}
.process li{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px 24px 28px;box-shadow:var(--shadow);transition:transform .3s}
.process li:hover{transform:translateY(-6px)}
.process li:not(:last-child)::after{content:"→";position:absolute;right:-19px;top:44px;z-index:2;width:30px;height:30px;border-radius:50%;background:var(--grad);color:#fff;font-weight:900;display:flex;align-items:center;justify-content:center;font-size:15px;box-shadow:0 8px 18px -6px rgba(37,99,235,.5)}
.step-no{font-size:15px;font-weight:900;letter-spacing:2px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.process h3{font-size:19px;font-weight:900;margin:10px 0}
.process p{font-size:14.5px;color:var(--muted);margin-bottom:16px}
.step-out{display:inline-block;font-size:13px;color:var(--blue-600);background:var(--grad-soft);border-radius:8px;padding:6px 12px;line-height:1.6}

/* ── 案例 ── */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-bottom:8px}
.case-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);transition:transform .35s,box-shadow .35s}
.case-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.case-media{position:relative;height:220px;overflow:hidden}
.case-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.case-card:hover .case-media img{transform:scale(1.06)}
.case-industry{position:absolute;bottom:14px;left:16px;font-size:13px;font-weight:700;color:#fff;background:rgba(10,20,40,.65);backdrop-filter:blur(6px);border:1px solid rgba(255,255,255,.25);padding:6px 16px;border-radius:999px}
.case-body{padding:30px 28px 32px}
.case-body h3{font-size:20px;font-weight:900;margin-bottom:10px}
.case-body>p{font-size:15px;color:var(--muted);margin-bottom:20px}
.case-metrics{display:grid;grid-template-columns:1fr 1fr;gap:14px;border-top:1px solid var(--line);padding-top:20px}
.case-metrics strong{display:block;font-size:30px;font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.case-metrics span{font-size:13.5px;color:var(--muted)}

/* ── 关于我们 ── */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;margin-bottom:70px}
.about-media{position:relative}
.about-media img{border-radius:var(--radius-lg);box-shadow:var(--shadow-lg)}
.about-badge{position:absolute;bottom:-24px;right:28px;background:var(--grad);color:#fff;border-radius:18px;padding:18px 30px;text-align:center;box-shadow:var(--shadow-lg)}
.about-badge strong{display:block;font-size:26px;font-weight:900}
.about-badge span{font-size:13px;opacity:.9}
.about-copy h2{font-size:clamp(28px,3.6vw,40px);font-weight:900;line-height:1.45;margin-bottom:20px}
.about-copy>p{color:var(--muted);font-size:16.5px;margin-bottom:16px}
.stack{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius-lg);padding:44px 48px}
.stack h3{font-size:22px;font-weight:900;margin-bottom:26px;text-align:center}
.stack-groups{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stack-groups>div{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px}
.stack-groups h4{font-size:15px;font-weight:900;color:var(--blue-600);margin-bottom:8px}
.stack-groups p{font-size:14px;color:var(--muted);line-height:1.8}

/* ── 客户评价 ── */
.voice-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.voice-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:36px 32px;box-shadow:var(--shadow);position:relative}
.voice-card::before{content:"“";position:absolute;top:14px;left:26px;font-size:64px;font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;opacity:.35;line-height:1}
.voice-card blockquote{font-size:16px;color:#33415C;margin:18px 0 24px;line-height:1.9}
.voice-card figcaption{border-top:1px solid var(--line);padding-top:18px}
.voice-card figcaption strong{display:block;font-size:16px}
.voice-card figcaption span{font-size:13.5px;color:var(--muted)}

/* ── FAQ ── */
.faq-wrap{max-width:860px}
.faq-list{display:grid;gap:16px}
.faq{background:#fff;border:1.5px solid var(--line);border-radius:16px;overflow:hidden;transition:border-color .3s,box-shadow .3s}
.faq[open]{border-color:var(--blue-500);box-shadow:var(--shadow)}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:22px 28px;font-size:17px;font-weight:700}
.faq summary::-webkit-details-marker{display:none}
.faq-icon{position:relative;flex:none;width:26px;height:26px;border-radius:50%;background:var(--grad-soft)}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--blue-600);border-radius:2px;top:50%;left:50%}
.faq-icon::before{width:12px;height:2.5px;transform:translate(-50%,-50%)}
.faq-icon::after{width:2.5px;height:12px;transform:translate(-50%,-50%);transition:.3s}
.faq[open] .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq p{padding:0 28px 26px;color:var(--muted);font-size:15.5px}

/* ── CTA ── */
.cta-section{background:linear-gradient(130deg,var(--navy-950) 30%,#10295E 75%,#0E5F7A);color:#fff;padding:110px 0;position:relative;overflow:hidden}
.cta-section::before{content:"";position:absolute;inset:0;background:radial-gradient(700px 380px at 12% 18%,rgba(59,130,246,.35),transparent 60%),radial-gradient(560px 340px at 88% 82%,rgba(34,211,238,.22),transparent 60%)}
.cta-grid{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.cta-copy h2{font-size:clamp(32px,4vw,46px);font-weight:900;line-height:1.4;margin-bottom:20px}
.cta-copy>p{color:#B9C8E2;font-size:17px;margin-bottom:28px}
.cta-points{list-style:none;display:grid;gap:14px;margin-bottom:36px}
.cta-points li{position:relative;padding-left:34px;font-size:16px;color:#DCE7F8}
.cta-points li::before{content:"✓";position:absolute;left:0;top:2px;width:24px;height:24px;border-radius:50%;background:linear-gradient(100deg,#3B82F6,#22D3EE);color:#fff;font-weight:900;font-size:14px;display:flex;align-items:center;justify-content:center}
.cta-points strong{color:#fff}
.cta-contact{display:flex;gap:40px;border-top:1px solid rgba(255,255,255,.15);padding-top:28px}
.cta-contact span{display:block;font-size:13px;color:#93A7C4;letter-spacing:2px;margin-bottom:6px}
.cta-contact strong{font-size:21px;font-weight:900}
.cta-form-wrap{background:rgba(255,255,255,.97);border-radius:var(--radius-lg);padding:8px;box-shadow:0 40px 90px -30px rgba(0,0,0,.5)}
.cta-form{background:#fff;border-radius:20px;padding:40px 38px;color:var(--ink)}
.cta-form h3{font-size:24px;font-weight:900;margin-bottom:6px}
.form-sub{font-size:14.5px;color:var(--muted);margin-bottom:24px}
.cta-form label{display:block;font-size:14.5px;font-weight:700;margin-bottom:16px}
.cta-form input,.cta-form select,.cta-form textarea{width:100%;margin-top:8px;font-family:var(--font);font-size:15px;border:1.5px solid var(--line);border-radius:12px;padding:13px 16px;background:#FAFCFE;transition:border-color .25s,box-shadow .25s;color:var(--ink)}
.cta-form input:focus,.cta-form select:focus,.cta-form textarea:focus{outline:none;border-color:var(--blue-500);box-shadow:0 0 0 4px rgba(59,130,246,.14)}
.cta-form input.error,.cta-form select.error{border-color:#EF4444;box-shadow:0 0 0 4px rgba(239,68,68,.12)}
.cta-form textarea{resize:vertical}
.form-note{font-size:12.5px;color:#93A0B8;text-align:center;margin-top:14px}
.form-success{margin-top:16px;background:#ECFDF5;border:1.5px solid #6EE7B7;color:#047857;font-weight:700;font-size:15px;border-radius:12px;padding:14px 18px;text-align:center}

/* ── 页脚 ── */
.footer{background:var(--navy-950);color:#B9C8E2;padding:80px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:44px;padding-bottom:56px}
.footer .brand-text strong{color:#fff}
.footer-brand p{font-size:14.5px;margin-top:18px;line-height:1.9}
.footer h4{color:#fff;font-size:16px;font-weight:700;margin-bottom:20px}
.footer nav a,.footer-grid>div p{display:block;font-size:14.5px;margin-bottom:12px;color:#93A7C4}
.footer nav a:hover{color:#fff}
.footer-grid .btn{margin-top:8px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:24px 0}
.footer-bottom .container{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer-bottom p{font-size:13px;color:#5F7191}
.icp{font-size:12.5px}

/* ── 回到顶部 ── */
.to-top{position:fixed;right:28px;bottom:28px;z-index:90;width:52px;height:52px;border-radius:50%;border:0;background:var(--grad);color:#fff;font-size:22px;font-weight:900;cursor:pointer;box-shadow:var(--shadow-lg);opacity:0;pointer-events:none;transform:translateY(12px);transition:.35s}
.to-top.show{opacity:1;pointer-events:auto;transform:none}
.to-top:hover{transform:translateY(-4px)}

/* ── 滚动显现 ── */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .8s cubic-bezier(.2,.7,.3,1),transform .8s cubic-bezier(.2,.7,.3,1)}
.reveal.visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}

/* ── 响应式 ── */
@media (max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:48px}
  .float-a{left:8px}.float-b{right:8px}
  .service-grid{grid-template-columns:1fr 1fr}
  .process{grid-template-columns:repeat(2,1fr)}
  .process li:not(:last-child)::after{display:none}
  .case-grid,.voice-grid{grid-template-columns:1fr 1fr}
  .about-grid,.cta-grid{grid-template-columns:1fr;gap:48px}
  .stack-groups{grid-template-columns:1fr 1fr}
  .band-inner{grid-template-columns:1fr 1fr;gap:40px}
  .band-item:nth-child(3){border-left:0}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:720px){
  .section{padding:80px 0}
  .nav-links{display:none}
  .nav-cta .btn{display:none}
  .nav-toggle{display:flex}
  .mobile-menu{display:flex;flex-direction:column;gap:4px;background:rgba(10,20,40,.98);backdrop-filter:blur(14px);padding:12px 5%;max-height:0;overflow:hidden;transition:max-height .4s;padding-top:0;padding-bottom:0}
  .mobile-menu.open{max-height:480px;padding:12px 5% 24px}
  .mobile-menu a{color:#DCE7F8;font-size:16px;font-weight:500;padding:13px 4px;border-bottom:1px solid rgba(255,255,255,.08)}
  .mobile-menu a.btn{border:0;margin-top:12px;color:#fff;text-align:center}
  .nav.scrolled .mobile-menu{background:rgba(255,255,255,.98)}
  .nav.scrolled .mobile-menu a{color:var(--ink);border-color:var(--line)}
  .service-grid,.case-grid,.voice-grid{grid-template-columns:1fr}
  .hero{padding-top:120px}
  .hero-stats dt{font-size:27px}
  .hero-stats>div+div{padding-left:16px}
  .tab-panels{padding:32px 26px}
  .check-list.cols-2{grid-template-columns:1fr}
  .process{grid-template-columns:1fr}
  .ops-row{grid-template-columns:1fr}
  .cta-contact{flex-direction:column;gap:18px}
  .cta-form{padding:32px 24px}
  .footer-grid{grid-template-columns:1fr;gap:36px}
  .stack{padding:32px 24px}
  .stack-groups{grid-template-columns:1fr}
  .band-inner{grid-template-columns:1fr 1fr;gap:32px}
}

.form-error{margin-top:16px;color:#B91C1C;background:#FEF2F2;border:1px solid #FECACA;border-radius:12px;padding:14px 18px}