/* 美加飞 品牌官网 - 全局样式 */
:root{
  --brand:#0E5CD8;
  --brand-2:#1D8BFF;
  --cyan:#22D3EE;
  --dark:#08142A;
  --ink:#12203A;
  --text:#33415C;
  --muted:#6B7A93;
  --line:#E6EBF3;
  --bg:#FFFFFF;
  --bg-soft:#F5F8FD;
  --radius:16px;
  --shadow:0 10px 30px rgba(8,20,42,.08);
  --shadow-lg:0 20px 60px rgba(8,20,42,.14);
  --max:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{color:var(--ink);margin:0;line-height:1.3;font-weight:700;letter-spacing:-.02em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}

/* ---------- 顶部导航 ---------- */
.hdr{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.88);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.hdr-in{display:flex;align-items:center;gap:28px;height:70px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--ink);white-space:nowrap}
.logo-mark{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--brand),var(--cyan));display:flex;align-items:center;justify-content:center;color:#fff;font-size:15px;font-weight:800;box-shadow:0 6px 16px rgba(14,92,216,.35)}
.logo small{display:block;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:.14em}
.nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav>li{position:relative}
.nav a.navlink{display:block;padding:9px 11px;border-radius:10px;font-size:15px;color:var(--ink);font-weight:500;transition:.2s;white-space:nowrap}
.nav a.navlink:hover,.nav>li:hover>a.navlink{color:var(--brand);background:var(--bg-soft)}
.nav a.navlink.active{color:var(--brand);background:var(--bg-soft)}
.nav .caret{margin-left:4px;font-size:10px;opacity:.6}
.dropdown{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(8px);min-width:200px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-lg);padding:8px;opacity:0;visibility:hidden;transition:.2s}
.nav>li:hover .dropdown{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.dropdown a{display:block;padding:9px 12px;border-radius:9px;font-size:14px;transition:.15s}
.dropdown a:hover{background:var(--bg-soft);color:var(--brand)}
.dropdown a span{display:block;font-size:12px;color:var(--muted)}
.hdr-actions{display:flex;align-items:center;gap:10px}
.burger{display:none;margin-left:auto;width:42px;height:42px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer}
.burger span{display:block;width:18px;height:2px;background:var(--ink);margin:4px auto;border-radius:2px}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 22px;border-radius:999px;font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;transition:.2s;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 8px 20px rgba(14,92,216,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(14,92,216,.38)}
.btn-ghost{border-color:var(--line);color:var(--ink);background:#fff}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-light{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.35)}
.btn-light:hover{background:rgba(255,255,255,.24)}
.btn-sm{padding:8px 16px;font-size:14px}
.btn-block{width:100%}

/* ---------- 通用区块 ---------- */
.section{padding:88px 0}
.section-soft{background:var(--bg-soft)}
.sec-head{max-width:720px;margin:0 auto 52px;text-align:center}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.16em;color:var(--brand);margin-bottom:12px}
.sec-head h2{font-size:34px;margin-bottom:14px}
.sec-head p{color:var(--muted);font-size:16px}
.grid{display:grid;gap:24px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}

/* ---------- Hero ---------- */
.hero{position:relative;background:var(--dark);color:#fff;overflow:hidden;padding:110px 0 90px}
.hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(900px 500px at 78% 8%,rgba(34,211,238,.28),transparent 60%),
  radial-gradient(760px 520px at 12% 92%,rgba(29,139,255,.30),transparent 62%);}
.hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);background-size:56px 56px;mask-image:radial-gradient(circle at 50% 30%,#000,transparent 78%)}
.hero-in{position:relative;z-index:2;display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center}
.badge{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;background:rgba(34,211,238,.14);border:1px solid rgba(34,211,238,.35);color:#9FE9F7;font-size:13px;font-weight:600;margin-bottom:22px}
.hero h1{color:#fff;font-size:48px;line-height:1.22;margin-bottom:20px}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,#7FE7FA,#7FB6FF);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{font-size:17px;color:rgba(255,255,255,.74);max-width:560px;margin-bottom:32px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:38px}
.hero-stats{display:flex;gap:40px;flex-wrap:wrap;border-top:1px solid rgba(255,255,255,.12);padding-top:26px}
.hero-stats div b{display:block;font-size:30px;color:#fff;line-height:1.2}
.hero-stats div span{font-size:13px;color:rgba(255,255,255,.6)}

/* Hero 右侧卡片 */
.hero-card{background:linear-gradient(160deg,rgba(255,255,255,.10),rgba(255,255,255,.04));border:1px solid rgba(255,255,255,.16);border-radius:22px;padding:26px;box-shadow:0 30px 70px rgba(0,0,0,.35)}
.hero-card h4{color:#fff;font-size:16px;margin-bottom:18px;display:flex;align-items:center;gap:8px}
.hero-card .dot{width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 4px rgba(34,211,238,.2)}
.stack{display:flex;flex-direction:column;gap:12px}
.stack-item{display:flex;gap:12px;padding:14px;border-radius:14px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.08);transition:.2s}
.stack-item:hover{background:rgba(255,255,255,.11);transform:translateX(4px)}
.stack-item i{width:34px;height:34px;flex:none;border-radius:10px;background:linear-gradient(135deg,var(--brand-2),var(--cyan));display:flex;align-items:center;justify-content:center;font-style:normal;font-size:13px;font-weight:800;color:#04121f}
.stack-item b{display:block;color:#fff;font-size:14.5px}
.stack-item span{font-size:12.5px;color:rgba(255,255,255,.62)}

/* ---------- 卡片 ---------- */
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;transition:.25s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:rgba(14,92,216,.25)}
.card .ico{width:50px;height:50px;border-radius:14px;background:linear-gradient(135deg,#EAF2FF,#DCF5FA);color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:800;margin-bottom:18px}
.card h3{font-size:19px;margin-bottom:10px}
.card p{font-size:14.5px;color:var(--muted)}
.card ul{margin-top:16px;padding-top:16px;border-top:1px dashed var(--line)}
.card ul li{position:relative;padding-left:18px;font-size:14px;color:var(--text);margin-bottom:7px}
.card ul li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:var(--brand-2)}

/* 产品卡（带标签） */
.prod{position:relative;overflow:hidden}
.prod-tag{position:absolute;right:20px;top:20px;font-size:12px;font-weight:700;padding:4px 11px;border-radius:999px;background:var(--bg-soft);color:var(--brand)}
.prod-tag.hot{background:linear-gradient(135deg,var(--brand),var(--cyan));color:#fff}
.prod .meta{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.chip{font-size:12px;padding:4px 10px;border-radius:8px;background:var(--bg-soft);color:var(--muted)}
.prod .link{display:inline-flex;align-items:center;gap:6px;margin-top:18px;color:var(--brand);font-weight:600;font-size:14.5px}
.prod .link:hover{gap:10px}

/* ---------- 分步流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;position:relative}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px 18px}
.step .n{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--cyan));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:14px;margin-bottom:12px}
.step h4{font-size:15.5px;margin-bottom:6px}
.step p{font-size:13px;color:var(--muted)}
.step:not(:last-child)::after{content:"";position:absolute;right:-12px;top:38px;width:12px;height:2px;background:var(--line)}

/* ---------- 对比表 ---------- */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table{width:100%;border-collapse:collapse;min-width:760px}
th,td{padding:16px 20px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--line)}
thead th{background:var(--bg-soft);color:var(--ink);font-weight:700;white-space:nowrap}
tbody tr:hover{background:#FAFCFF}
td:first-child{font-weight:600;color:var(--ink)}
.tick{color:var(--brand);font-weight:700}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;padding-left:34px}
.timeline::before{content:"";position:absolute;left:9px;top:8px;bottom:8px;width:2px;background:linear-gradient(180deg,var(--brand),var(--cyan))}
.tl-item{position:relative;margin-bottom:30px}
.tl-item::before{content:"";position:absolute;left:-34px;top:6px;width:20px;height:20px;border-radius:50%;background:#fff;border:3px solid var(--brand);box-shadow:0 0 0 4px rgba(14,92,216,.12)}
.tl-item h4{font-size:17px;margin-bottom:6px}
.tl-item p{font-size:14.5px;color:var(--muted)}

/* ---------- 新闻 / 政策 ---------- */
.news-item{display:grid;grid-template-columns:120px 1fr auto;gap:26px;align-items:center;padding:24px;border-bottom:1px solid var(--line);transition:.2s}
.news-item:hover{background:var(--bg-soft)}
.news-date{font-size:13px;color:var(--muted)}
.news-date b{display:block;font-size:26px;color:var(--ink);line-height:1.1}
.news-item h3{font-size:18px;margin-bottom:6px}
.news-item p{font-size:14px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tag{display:inline-block;font-size:12px;padding:3px 10px;border-radius:6px;background:var(--bg-soft);color:var(--brand);font-weight:600}
.tag.new{background:linear-gradient(135deg,var(--brand),var(--cyan));color:#fff}

/* 折叠面板 */
.acc{border:1px solid var(--line);border-radius:14px;margin-bottom:14px;background:#fff;overflow:hidden}
.acc-hd{padding:20px 24px;display:flex;align-items:center;gap:14px;cursor:pointer;font-weight:600;color:var(--ink);font-size:16px;user-select:none}
.acc-hd:hover{background:var(--bg-soft)}
.acc-hd .plus{margin-left:auto;transition:.3s;font-size:20px;color:var(--brand);font-weight:400}
.acc.open .acc-hd .plus{transform:rotate(45deg)}
.acc-bd{display:none;padding:0 24px 24px;font-size:14.5px;color:var(--text)}
.acc.open .acc-bd{display:block;animation:fade .3s ease}
.acc-bd h4{font-size:15px;margin:18px 0 8px}
.acc-bd ol,.acc-bd ul{padding-left:20px}
.acc-bd li{margin-bottom:6px}
@keyframes fade{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

/* ---------- 会员 / 价格 ---------- */
.plan{border:1px solid var(--line);border-radius:var(--radius);padding:30px;background:#fff;display:flex;flex-direction:column;transition:.25s}
.plan:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.plan.featured{border:2px solid var(--brand);box-shadow:0 16px 40px rgba(14,92,216,.16);position:relative}
.plan.featured::before{content:"最受欢迎";position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,var(--brand),var(--cyan));color:#fff;font-size:12px;font-weight:700;padding:4px 14px;border-radius:999px}
.plan h3{font-size:20px}
.plan .price{font-size:32px;font-weight:800;color:var(--ink);margin:14px 0 4px}
.plan .price span{font-size:14px;font-weight:500;color:var(--muted)}
.plan ul{margin:20px 0;flex:1}
.plan ul li{position:relative;padding-left:22px;font-size:14.5px;margin-bottom:10px}
.plan ul li::before{content:"✓";position:absolute;left:0;color:var(--brand);font-weight:800}

/* ---------- 表单 ---------- */
.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;font-weight:600;color:var(--ink);margin-bottom:7px}
.field input,.field select,.field textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:14.5px;font-family:inherit;color:var(--text);background:#fff;transition:.2s;outline:none}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(14,92,216,.12)}
.field textarea{min-height:110px;resize:vertical}
.form-note{font-size:13px;color:var(--muted);margin-top:12px}
.alert{display:none;padding:14px 16px;border-radius:10px;background:#E9F8EF;color:#0E7A3C;font-size:14px;margin-top:16px;border:1px solid #BFE9CF}

/* ---------- CTA 条 ---------- */
.cta{background:linear-gradient(120deg,var(--dark),#0E3A8C 60%,#0B5CA8);color:#fff;padding:72px 0;text-align:center}
.cta h2{color:#fff;font-size:32px;margin-bottom:14px}
.cta p{color:rgba(255,255,255,.72);margin-bottom:30px;font-size:16px}
.cta .btn-light{background:#fff;color:var(--brand);border-color:#fff}
.cta .btn-light:hover{background:rgba(255,255,255,.88)}

/* ---------- 页脚 ---------- */
.ftr{background:var(--dark);color:rgba(255,255,255,.62);padding:64px 0 0;font-size:14px}
.ftr-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:44px}
.ftr h4{color:#fff;font-size:15px;margin-bottom:18px}
.ftr a{display:block;padding:6px 0;transition:.2s}
.ftr a:hover{color:#7FE7FA;transform:translateX(3px)}
.ftr .logo{color:#fff;margin-bottom:16px}
.ftr .logo small{color:rgba(255,255,255,.45)}
.ftr-btm{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px}

/* ---------- 页面内页头 ---------- */
.phead{background:linear-gradient(135deg,var(--dark),#0E3A8C);color:#fff;padding:80px 0 70px;position:relative;overflow:hidden}
.phead::after{content:"";position:absolute;inset:0;background:radial-gradient(700px 380px at 82% 20%,rgba(34,211,238,.22),transparent 62%)}
.phead .container{position:relative;z-index:2}
.phead h1{color:#fff;font-size:40px;margin-bottom:12px}
.phead p{color:rgba(255,255,255,.7);font-size:16px;max-width:640px}
.crumb{font-size:13px;color:rgba(255,255,255,.5);margin-bottom:14px}
.crumb a:hover{color:#fff}

/* 小贴士 */
.tip{background:#FFF8E8;border:1px solid #F5E3B8;color:#8A6212;padding:14px 18px;border-radius:12px;font-size:14px;margin-bottom:28px}

/* 入场动画 */
.reveal{opacity:0;transform:translateY(24px);transition:.7s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- 应用场景 ---------- */
.sc{padding:56px 0;border-bottom:1px solid var(--line)}
.sc:last-of-type{border-bottom:none}
.sc-head{display:flex;gap:18px;align-items:flex-start;margin-bottom:28px}
.sc-no{flex:none;width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,var(--brand),var(--cyan));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:17px;box-shadow:0 8px 20px rgba(14,92,216,.22)}
.sc-head h2{font-size:26px;margin-bottom:6px}
.sc-head p{color:var(--muted);font-size:15.5px}
.sc-label{font-size:16px;margin-bottom:14px;padding-left:12px;border-left:3px solid var(--brand)}
.sc-sol{border-color:rgba(14,92,216,.28);background:linear-gradient(160deg,#FBFCFF,#F5F9FF)}
.sc-sol-text{margin-bottom:18px;font-size:14.5px}
.sc-sub{font-size:14px;color:var(--ink);margin:16px 0 10px}
.sc-chips{display:flex;gap:8px;flex-wrap:wrap}
.sc-btns{display:flex;gap:12px;margin-top:22px;flex-wrap:wrap}
/* 痛点列表：每 3 条后多留半行 */
.sc-pain li{margin-bottom:2px}
.sc-pain li:nth-child(3n){margin-bottom:14px}
.sc-pain li:last-child{margin-bottom:0}

/* ---------- 客户案例 ---------- */
.case-card{display:flex;flex-direction:column}
.case-top{display:flex;align-items:center;gap:10px;margin-bottom:14px;flex-wrap:wrap}
.case-ind{font-size:12.5px;font-weight:700;color:var(--brand);background:var(--bg-soft);padding:4px 11px;border-radius:8px}
.case-card h3{font-size:19px;margin-bottom:10px}
.case-sum{font-size:14.5px;color:var(--muted)}
.case-meta{font-size:13px;color:var(--muted);margin:14px 0 12px;padding-top:12px;border-top:1px dashed var(--line)}
.case-res li{position:relative;padding-left:20px;font-size:14px;margin-bottom:8px}
.case-res li::before{content:"✓";position:absolute;left:0;color:var(--brand);font-weight:800}

/* ---------- 响应式 ---------- */
@media (max-width:1240px){
  .nav a.navlink{padding:9px 7px;font-size:14.5px}
  .hdr-actions .btn{padding:9px 14px;font-size:14px}
  .logo{font-size:18px}
}
@media (max-width:1024px){
  .nav a.navlink{padding:9px 11px;font-size:15px}
  .hero-in{grid-template-columns:1fr;gap:40px}
  .hero h1{font-size:38px}
  .g4{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .step:not(:last-child)::after{display:none}
  .ftr-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .nav,.hdr-actions .btn-ghost{display:none}
  .nav.show{display:flex;flex-direction:column;position:absolute;top:70px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:12px;box-shadow:var(--shadow-lg);max-height:calc(100vh - 70px);overflow:auto}
  .nav.show>li{width:100%}
  .nav.show .dropdown{position:static;transform:none;opacity:1;visibility:visible;box-shadow:none;border:none;padding:0 0 0 12px;background:transparent}
  .burger{display:block}
  .hdr-actions{margin-left:0}
  .hero{padding:70px 0 60px}
  .hero h1{font-size:31px}
  .section{padding:60px 0}
  .sec-head h2{font-size:26px}
  .g2,.g3,.g4{grid-template-columns:1fr}
  .news-item{grid-template-columns:1fr;gap:12px}
  .news-date{display:flex;gap:8px;align-items:baseline}
  .news-date b{font-size:18px}
  .phead{padding:52px 0 44px}
  .phead h1{font-size:28px}
  .ftr-grid{grid-template-columns:1fr}
  .hero-stats{gap:26px}
}