/* ===== 悦枫科技 官网重设计 · 设计系统 ===== */
:root{
  --primary:#1f6fb2; --primary-d:#155a91; --primary-l:#e8f1fb;
  --accent:#14b8a6; --accent-d:#0e9488;
  --ink:#0f172a; --sub:#475569; --muted: #d90be8;
  --bg:#ffffff; --soft:#f8fafc; --soft2:#f1f5f9; --line:#e2e8f0;
  --radius:16px; --shadow:0 6px 24px rgba(15,23,42,.08);
  --shadow-lg:0 16px 48px rgba(15,23,42,.12);
  --maxw:1180px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.75;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.text-accent{color:var(--accent-d)}

/* 按钮 */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border-radius:999px;font-weight:600;font-size:15px;cursor:pointer;transition:.2s;border:1px solid transparent}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 20px rgba(31,111,178,.28)}
.btn-primary:hover{background:var(--primary-d);transform:translateY(-2px)}
.btn-ghost{background:#fff;color:var(--primary);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--primary);background:var(--primary-l)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-d);transform:translateY(-2px)}

/* 导航 */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.85);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;letter-spacing:.5px}
.logo .mark{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:800}
.nav-links{display:flex;align-items:center;gap:28px;list-style:none}
.nav-links a{font-size:15px;color:var(--sub);font-weight:500;transition:.2s}
.nav-links a:hover,.nav-links a.active{color:var(--primary)}
.nav-cta{display:flex;align-items:center;gap:12px}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:2px;background:var(--ink);border-radius:2px}

/* Hero */
.hero{position:relative;overflow:hidden;background:radial-gradient(1200px 600px at 80% -10%,rgba(20,184,166,.18),transparent),radial-gradient(900px 500px at 0% 10%,rgba(31,111,178,.18),transparent),#fff;padding:84px 0 72px}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.hero h1{font-size:46px;line-height:1.2;letter-spacing:-.5px;margin-bottom:18px}
.hero h1 .grad{background:linear-gradient(120deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:18px;color:var(--sub);margin-bottom:28px;max-width:520px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-lg);padding:22px;display:grid;gap:14px}
.hero-card .row{display:flex;align-items:center;gap:12px;text-decoration:none;color:inherit;border-radius:12px;padding:8px 10px;margin:-8px -10px;transition:background .2s,transform .2s}
.hero-card a.row:hover{background:var(--primary-l);transform:translateX(4px)}
.hero-card a.row:hover .t{color:var(--primary)}
.hero-card .ic{width:42px;height:42px;border-radius:11px;background:var(--primary-l);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:20px;flex:0 0 auto}
.hero-card .t{font-weight:700}
.hero-card .d{font-size:13px;color:var(--sub)}

/* 区块 */
.section{padding:72px 0}
.section.soft{background:var(--soft)}
.sec-head{text-align:center;max-width:680px;margin:0 auto 44px}
.sec-head .eyebrow{display:inline-block;color:var(--accent-d);font-weight:700;font-size:13px;letter-spacing:2px;text-transform:uppercase;margin-bottom:10px}
.sec-head h2{font-size:32px;letter-spacing:-.5px;margin-bottom:12px}
.sec-head p{color:var(--sub);font-size:16px}

/* 网格与卡片 */
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.22s;box-shadow:var(--shadow)}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#cfe0f1}
.card .ic{width:50px;height:50px;border-radius:13px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:16px}
.card h3{font-size:19px;margin-bottom:8px}
.card p{color:var(--sub);font-size:14.5px}
.card .more{display:inline-block;margin-top:14px;color:var(--primary);font-weight:600;font-size:14px}

/* 产品卡（带图） */
.prod{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.22s;box-shadow:var(--shadow)}
.prod:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.prod img{width:100%;height:190px;object-fit:cover;background:var(--soft2)}
.prod .body{padding:20px 22px 24px}
.prod .tag{display:inline-block;font-size:12px;color:var(--accent-d);background:#e6f7f4;border-radius:999px;padding:3px 10px;margin-bottom:10px;font-weight:600}
.prod h3{font-size:19px;margin-bottom:8px}
.prod p{color:var(--sub);font-size:14px;min-height:62px}
.prod .more{color:var(--primary);font-weight:600;font-size:14px}

/* 数据条 */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat .n{font-size:38px;font-weight:800;background:linear-gradient(120deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .l{color:var(--sub);font-size:14px;margin-top:4px}

/* 特性列表 */
.feat{list-style:none;display:grid;gap:12px}
.feat li{display:flex;gap:10px;color:var(--sub);font-size:15px}
.feat li::before{content:"✓";color:var(--accent-d);font-weight:800;flex:0 0 auto}

/* 分栏块 */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split img{border-radius:var(--radius);box-shadow:var(--shadow-lg)}

/* 步骤 */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:s}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;position:relative}
.step::before{counter-increment:s;content:"0" counter(s);position:absolute;top:-14px;left:22px;background:var(--primary);color:#fff;font-weight:800;font-size:13px;padding:4px 10px;border-radius:8px}
.step h4{margin:8px 0 6px;font-size:16px}
.step p{color:var(--sub);font-size:13.5px}

/* CTA 横幅 */
.cta{background:linear-gradient(120deg,var(--primary),var(--accent));border-radius:24px;padding:48px;color:#fff;text-align:center;box-shadow:var(--shadow-lg)}
.cta h2{font-size:30px;margin-bottom:10px}
.cta p{opacity:.9;margin-bottom:24px;font-size:16px}
.cta .btn-ghost{background:rgba(255,255,255,.15);color:#fff;border-color:rgba(255,255,255,.4)}
.cta .btn-ghost:hover{background:#fff;color:var(--primary)}

/* 面包屑 / 子页头 */
.subhero{background:var(--soft);border-bottom:1px solid var(--line);padding:46px 0}
.subhero h1{font-size:34px;letter-spacing:-.5px}
.subhero p{color:var(--sub);margin-top:8px;font-size:16px}
.crumb{font-size:13px;color:var(--muted);margin-bottom:10px}
.crumb a:hover{color:var(--primary)}

/* 行业方案 */
.ind{display:grid;grid-template-columns:.8fr 1.2fr;gap:36px;padding:30px 0;border-bottom:1px solid var(--line)}
.ind:last-child{border-bottom:0}
.ind .num{font-size:14px;font-weight:800;color:var(--accent-d)}
.ind h3{font-size:22px;margin:6px 0 10px}
.ind .pain{color:var(--sub);font-size:14.5px}
.ind .sol{list-style:none;display:grid;gap:10px}
.ind .sol li{display:flex;gap:10px;font-size:15px}
.ind .sol li b{color:var(--primary)}

/* 表单 */
.form{display:grid;gap:14px;max-width:520px}
.form input,.form textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-family:inherit;font-size:15px;background:#fff}
.form input:focus,.form textarea:focus{outline:0;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-l)}

/* 页脚 */
.footer{background:#0f172a;color:#cbd5e1;padding:54px 0 28px;margin-top:0}
.footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr 1fr;gap:28px}
.footer .qr-mini{width:104px;height:auto;border-radius:8px;background:#fff;padding:5px;display:block;margin-bottom:8px;transition:transform .25s ease;cursor:zoom-in}
.footer .qr-mini:hover{transform:scale(1.12)}
.footer .qr-cap{font-size:13px;color:#94a3b8;line-height:1.5}
.footer h4{color:#fff;font-size:15px;margin-bottom:14px}
.footer a{color:#94a3b8;font-size:14px;display:block;margin-bottom:9px}
.footer a:hover{color:#fff}
.footer .logo{color:#fff;margin-bottom:12px}
.footer .desc{font-size:13.5px;color:#94a3b8;max-width:280px}
.footer .bottom{border-top:1px solid #1e293b;margin-top:36px;padding-top:18px;font-size:13px;color:#64748b;text-align:center}

/* 响应式 */
@media(max-width:920px){
  .hero-grid,.split,.ind{grid-template-columns:1fr}
  .grid-4,.stats{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .footer .cols{grid-template-columns:1fr 1fr}
  .hero h1{font-size:36px}
  .cta{padding:34px 22px}
}
@media(max-width:620px){
  .nav-links{position:absolute;top:66px;left:0;right:0;background:#fff;flex-direction:column;gap:0;padding:8px 20px 16px;border-bottom:1px solid var(--line);display:none}
  .nav-links.open{display:flex}
  .nav-links li{padding:12px 0;border-bottom:1px solid var(--soft2)}
  .nav-toggle{display:flex}
  .nav-cta .btn-ghost{display:none}
  .grid-2,.grid-3,.grid-4,.stats,.steps{grid-template-columns:1fr}
  .footer .cols{grid-template-columns:1fr}
  .hero{padding:54px 0 40px}
  .hero h1{font-size:30px}
}

/* ===== 悬浮客服组件 & 二维码 ===== */
.float-widget{position:fixed;right:24px;bottom:24px;z-index:60;display:flex;flex-direction:column;align-items:flex-end;gap:12px}
.float-btn{width:56px;height:56px;border-radius:50%;border:none;background:linear-gradient(135deg,#1f6fb2,#2bb5a0);color:#fff;font-size:24px;cursor:pointer;box-shadow:0 8px 22px rgba(31,111,178,.42);display:flex;align-items:center;justify-content:center;transition:transform .2s}
.float-btn:hover{transform:scale(1.06)}
.float-btn.phone{background:linear-gradient(135deg,#16a34a,#0e9f6e)}
.float-actions{display:flex;gap:12px;align-items:flex-end}
.float-panel{display:none;background:#fff;border-radius:14px;box-shadow:0 12px 36px rgba(15,23,42,.22);padding:14px;width:220px;text-align:center;overflow:visible}
.float-widget.open .float-panel{display:block;animation:fpIn .2s ease}
.float-panel img{width:190px;height:auto;border-radius:8px;transition:transform .25s ease;transform-origin:center bottom;cursor:zoom-in}
.float-panel img:hover{transform:scale(1.22)}
.fp-tabs{display:flex;gap:6px;margin-bottom:10px}
.fp-tab{flex:1;border:1px solid var(--line);background:#f4f7fb;color:#475569;border-radius:8px;padding:7px 0;font-size:13px;cursor:pointer;transition:.2s}
.fp-tab.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.float-panel p{margin:8px 0 0;font-size:13px;color:#334155}
@keyframes fpIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.qr-block{max-width:280px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;text-align:center;box-shadow:var(--shadow)}
.qr-block img{width:200px;height:auto;border-radius:8px;transition:transform .25s ease;cursor:zoom-in}
.qr-block img:hover{transform:scale(1.08)}
.qr-block .t{font-weight:700;margin-top:12px;color:var(--ink)}
.qr-block .d{font-size:13px;color:var(--sub);margin-top:4px}