/* 飞陆官网 · 基础样式（变量/布局/组件），所有页面共用 */
:root{
    --bg:#070b14;
    --bg2:#0b1220;
    --card:#0e1626;
    --card2:#111c30;
    --line:rgba(120,160,255,.14);
    --line2:rgba(120,160,255,.3);
    --txt:#eef3fc;
    --txt2:#b6c2d9;
    --muted:#7d8ba8;
    --cyan:#35e0f5;
    --blue:#5b8cff;
    --violet:#a480ff;
    --green:#3ddc97;
    --amber:#ffb547;
    --grad:linear-gradient(115deg,#35e0f5,#5b8cff 52%,#a480ff);
    --radius:16px;
  }
  *{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth;scroll-padding-top:76px}
  body{
    background:var(--bg);color:var(--txt);
    font-family:"PingFang SC","Microsoft YaHei",-apple-system,"Segoe UI",system-ui,sans-serif;
    line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden;
  }
  a{color:inherit;text-decoration:none}
  .wrap{width:min(1160px,92vw);margin:0 auto}

  /* ---------- background ---------- */
  .bg-layer{position:fixed;inset:0;z-index:-2;pointer-events:none;overflow:hidden}
  .bg-grid{
    position:absolute;inset:0;
    background-image:linear-gradient(rgba(120,160,255,.055) 1px,transparent 1px),
                     linear-gradient(90deg,rgba(120,160,255,.055) 1px,transparent 1px);
    background-size:56px 56px;
    mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 20%,transparent 78%);
  }
  .blob{position:absolute;border-radius:50%;filter:blur(110px);opacity:.32}
  .b1{width:520px;height:520px;background:#1b62d6;top:-180px;left:-120px}
  .b2{width:460px;height:460px;background:#6d3fd8;top:12%;right:-160px;opacity:.24}
  .b3{width:600px;height:600px;background:#0e9fb5;bottom:-260px;left:28%;opacity:.16}

  /* ---------- nav ---------- */
  nav{
    position:sticky;top:0;z-index:50;
    backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
    background:rgba(7,11,20,.72);border-bottom:1px solid var(--line);
  }
  .nav-in{display:flex;align-items:center;justify-content:space-between;height:68px;gap:20px}
  .logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;letter-spacing:.02em;white-space:nowrap}
  .logo-mark{
    width:28px;height:28px;border-radius:8px;background:var(--grad);
    display:grid;place-items:center;font-size:14px;color:#06090f;font-weight:900;
    box-shadow:0 0 18px rgba(53,224,245,.45);
  }
  .nav-links{display:flex;gap:26px;font-size:14.5px;color:var(--txt2)}
  .nav-links a{transition:color .2s;position:relative}
  .nav-links a:hover{color:var(--cyan)}
  .btn{
    display:inline-flex;align-items:center;gap:7px;
    padding:10px 20px;border-radius:10px;font-size:14.5px;font-weight:600;
    background:var(--grad);color:#06090f;white-space:nowrap;
    transition:transform .18s,box-shadow .18s;box-shadow:0 6px 22px rgba(53,224,245,.26);
  }
  .btn:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(53,224,245,.4)}
  .btn.ghost{
    background:transparent;color:var(--txt);border:1px solid var(--line2);box-shadow:none;
  }
  .btn.ghost:hover{background:rgba(120,160,255,.09);border-color:var(--cyan)}

  /* ---------- hero ---------- */
  .hero{padding:74px 0 60px;position:relative}
  .hero-in{display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center}
  .pill{
    display:inline-flex;align-items:center;gap:8px;
    padding:6px 14px;border-radius:99px;font-size:13px;
    background:rgba(53,224,245,.09);border:1px solid rgba(53,224,245,.28);color:var(--cyan);
    margin-bottom:22px;
  }
  .pill .liveDot{width:6px;height:6px;border-radius:50%;background:var(--green);box-shadow:0 0 8px var(--green);animation:blink 1.8s infinite}
  @keyframes blink{0%,100%{opacity:1}50%{opacity:.3}}

  h1{font-size:clamp(30px,4.1vw,50px);line-height:1.22;font-weight:800;letter-spacing:-.01em;margin-bottom:20px}
  h1 .hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
  .hero-lead{font-size:17.5px;color:var(--txt2);max-width:560px;margin-bottom:14px}
  .hero-lead b{color:var(--txt);font-weight:600}
  .hero-sub{font-size:14.5px;color:var(--muted);max-width:560px;margin-bottom:30px}
  .cta{display:flex;gap:13px;flex-wrap:wrap;margin-bottom:34px}

  .kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;max-width:560px}
  .kpi{
    padding:14px 16px;border-radius:12px;background:var(--card);border:1px solid var(--line);
  }
  .kpi b{display:block;font-size:19px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:2px}
  .kpi span{font-size:12.5px;color:var(--muted)}

  /* hero visual */
  .hero-visual{position:relative;height:420px;display:grid;place-items:center}
  .orbit{width:100%;max-width:430px;overflow:visible}
  .ring{fill:none;stroke-width:1.1;opacity:.9}
  .dash{stroke-dasharray:5 8;animation:dashmove 22s linear infinite}
  @keyframes dashmove{to{stroke-dashoffset:-320}}
  .node{animation:nodePulse 2.6s ease-in-out infinite}
  @keyframes nodePulse{0%,100%{opacity:.35;r:3.4}50%{opacity:1}}
  .core{animation:corePulse 3.4s ease-in-out infinite;transform-origin:200px 200px}
  @keyframes corePulse{0%,100%{transform:scale(.94);opacity:.6}50%{transform:scale(1.06);opacity:1}}
  .badge{
    position:absolute;padding:6px 12px;border-radius:9px;font-size:12px;
    background:rgba(11,18,32,.9);border:1px solid var(--line2);color:var(--txt2);
    font-family:ui-monospace,SFMono-Regular,monospace;letter-spacing:.04em;
  }
  .badge.tl{top:16px;left:0;color:var(--cyan);border-color:rgba(53,224,245,.4)}
  .badge.tr{top:34px;right:0}
  .badge.bl{bottom:40px;left:8px}
  .badge.br{bottom:12px;right:10px;color:var(--violet);border-color:rgba(164,128,255,.4)}

  /* ---------- section shell ---------- */
  section{padding:78px 0;position:relative}
  .sec-alt{background:linear-gradient(180deg,transparent,rgba(11,18,32,.62) 18%,rgba(11,18,32,.62) 82%,transparent);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .head{margin-bottom:44px;max-width:760px}
  .kicker{
    font-family:ui-monospace,SFMono-Regular,monospace;font-size:12.5px;letter-spacing:.16em;
    color:var(--cyan);text-transform:uppercase;margin-bottom:12px;
  }
  h2{font-size:clamp(24px,2.9vw,36px);font-weight:750;line-height:1.3;letter-spacing:-.008em;margin-bottom:14px}
  h2 .hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
  .head p{font-size:16px;color:var(--txt2)}

  /* ---------- 3 运力 ---------- */
  .grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
  .card{
    background:linear-gradient(170deg,var(--card),var(--bg2));
    border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;
    transition:transform .22s,border-color .22s,box-shadow .22s;position:relative;overflow:hidden;
  }
  .card::before{
    content:"";position:absolute;inset:0;border-radius:var(--radius);
    background:radial-gradient(320px 160px at 50% 0%,rgba(53,224,245,.1),transparent 70%);
    opacity:0;transition:opacity .25s;pointer-events:none;
  }
  .card:hover{transform:translateY(-5px);border-color:var(--line2);box-shadow:0 16px 40px rgba(0,0,0,.4)}
  .card:hover::before{opacity:1}
  .ico{
    width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
    background:rgba(53,224,245,.1);border:1px solid rgba(53,224,245,.28);
    font-size:20px;margin-bottom:16px;
  }
  .card h3{font-size:18.5px;font-weight:700;margin-bottom:8px;display:flex;align-items:center;gap:9px;flex-wrap:wrap}
  .tag{
    font-size:11.5px;padding:2.5px 8px;border-radius:6px;font-weight:600;
    background:rgba(91,140,255,.14);color:#9bb6ff;border:1px solid rgba(91,140,255,.3);
  }
  .card p{font-size:14.5px;color:var(--txt2);margin-bottom:12px}
  .spec{list-style:none;font-size:13.5px;color:var(--muted);display:flex;flex-direction:column;gap:7px}
  .spec li{display:flex;gap:9px;align-items:flex-start}
  .spec li::before{content:"";flex:0 0 auto;width:5px;height:5px;border-radius:50%;background:var(--cyan);margin-top:9px;opacity:.8}

  /* ---------- 流程 ---------- */
  .flow{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;position:relative}
  .step{
    background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
    padding:24px 20px;position:relative;
  }
  .step .num{
    font-family:ui-monospace,monospace;font-size:12px;color:var(--cyan);
    letter-spacing:.1em;margin-bottom:12px;display:block;
  }
  .step h4{font-size:16.5px;font-weight:700;margin-bottom:8px}
  .step p{font-size:13.8px;color:var(--muted)}
  .step::after{
    content:"→";position:absolute;right:-13px;top:50%;transform:translateY(-50%);
    color:var(--line2);font-size:17px;z-index:2;
  }
  .step:last-child::after{display:none}

  /* ---------- 场景 ---------- */
  .grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
  .scene{
    display:flex;gap:18px;padding:24px;border-radius:var(--radius);
    background:var(--card);border:1px solid var(--line);transition:border-color .2s,background .2s;
  }
  .scene:hover{border-color:var(--line2);background:var(--card2)}
  .scene .em{font-size:24px;line-height:1;flex:0 0 auto;margin-top:2px}
  .scene h4{font-size:16.5px;font-weight:700;margin-bottom:6px}
  .scene p{font-size:14px;color:var(--txt2)}
  .scene .who{font-size:12.5px;color:var(--muted);margin-top:9px;display:block}

  /* ---------- 优势 ---------- */
  .adv{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
  .adv-item{padding:24px;border-radius:var(--radius);background:linear-gradient(160deg,var(--card),transparent);border:1px solid var(--line)}
  .adv-item h4{font-size:16.5px;font-weight:700;margin-bottom:9px;display:flex;align-items:center;gap:9px}
  .adv-item h4 .ck{color:var(--green);font-size:15px}
  .adv-item p{font-size:14px;color:var(--txt2)}

  /* ---------- contact ---------- */
  .contact-box{
    border-radius:22px;padding:48px 44px;
    background:linear-gradient(135deg,rgba(53,224,245,.1),rgba(164,128,255,.09));
    border:1px solid var(--line2);text-align:center;
  }
  .contact-box h2{margin-bottom:14px}
  .contact-box > p{font-size:16px;color:var(--txt2);max-width:560px;margin:0 auto 30px}
  .contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;max-width:760px;margin:0 auto 30px;text-align:left}
  .ci{padding:16px 18px;border-radius:12px;background:rgba(7,11,20,.6);border:1px solid var(--line)}
  .ci b{display:block;font-size:12px;color:var(--muted);letter-spacing:.08em;margin-bottom:5px;font-weight:500}
  .ci span{font-size:14.5px;color:var(--txt);word-break:break-all}

  /* ---------- footer ---------- */
  footer{padding:34px 0;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
  .foot-in{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;align-items:flex-start}
  .foot-brand{color:var(--txt);font-size:14.5px;font-weight:600;margin-bottom:6px}
  .foot-meta{margin-top:8px;max-width:620px;line-height:1.7}
  .foot-right{text-align:right;line-height:1.9}
  .foot-copy{margin-top:8px}
  .foot-beian{margin-top:8px;font-size:12.5px}
  .foot-beian a{color:var(--muted);text-decoration:none}
  .foot-beian a:hover{color:var(--txt);text-decoration:underline}
  .foot-links{display:flex;gap:18px;flex-wrap:wrap;justify-content:flex-end}
  .foot-in a:hover{color:var(--cyan)}

  /* ---------- responsive ---------- */
  @media (max-width:1000px){
    .hero-in{grid-template-columns:1fr;gap:40px}
    .hero-visual{height:340px}
    .grid3{grid-template-columns:1fr}
    .flow{grid-template-columns:repeat(2,1fr)}
    .step::after{display:none}
    .adv,.grid2{grid-template-columns:1fr}
  }
  @media (max-width:720px){
    .nav-links{display:none}
    .hero{padding:52px 0 44px}
    section{padding:56px 0}
    .kpis{grid-template-columns:1fr;max-width:100%}
    .flow{grid-template-columns:1fr}
    .contact-grid{grid-template-columns:1fr}
    .contact-box{padding:34px 24px}
    .hero-visual{height:290px}
    .foot-right{text-align:left}
    .foot-links{justify-content:flex-start}
  }