:root{
    --navy-1:#173B73;
    --navy-2:#2D5FA6;
    --blue-accent:#3B7DD8;
    --blue-light:#EAF2FC;
    --orange:#F0803C;
    --orange-dark:#E06B27;
    --text-dark:#1B2A41;
    --text-body:#4A5A72;
    --text-muted:#8592A6;
    --card-border:#E7ECF3;
    --white:#FFFFFF;
  }
  *{box-sizing:border-box;margin:0;padding:0;}
  html{scroll-behavior:smooth;}
  body{
    font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
    color:var(--text-dark);
    background:var(--white);
    line-height:1.6;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;}
  a{text-decoration:none;color:inherit;}
  ul{list-style:none;}

  /* ---------- Header ---------- */

  .nav-wrap{
    max-width:1200px;margin:0 auto;
    display:flex;align-items:center;justify-content:space-between;
    padding:0 24px;height:64px;
  }
  .brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:19px;font-weight:700;letter-spacing:.5px;}
  .brand-mark{
    width:32px;height:32px;border-radius:8px;
    background:linear-gradient(145deg,var(--orange),var(--orange-dark));
    display:flex;align-items:center;justify-content:center;
    flex-shrink:0;
  }
  .brand-mark svg{width:18px;height:18px;}
  nav.main-nav{display:flex;align-items:center;gap:2px;}
  nav.main-nav a{
    color:rgba(255,255,255,.78);
    font-size:14.5px;
    padding:10px 16px;
    border-radius:6px;
    position:relative;
    transition:color .2s ease, background .2s ease;
    white-space:nowrap;
  }
  nav.main-nav a:hover{color:#fff;background:rgba(255,255,255,.06);}
  nav.main-nav a.active{color:#fff;background:rgba(255,255,255,.1);}
  nav.main-nav a.active::after{
    content:"";position:absolute;left:16px;right:16px;bottom:4px;height:2px;
    background:var(--orange);border-radius:2px;
  }
  .nav-actions{display:flex;align-items:center;}
  .btn-login{
    background:linear-gradient(135deg,var(--orange),var(--orange-dark));
    color:#fff;font-size:14px;font-weight:600;
    padding:9px 22px;border-radius:20px;
    box-shadow:0 4px 12px rgba(224,107,39,.35);
    transition:transform .2s ease, box-shadow .2s ease;
    border:none;cursor:pointer;
  }
  .btn-login:hover{transform:translateY(-1px);box-shadow:0 6px 16px rgba(224,107,39,.45);}
  .nav-toggle{display:none;background:none;border:none;color:#fff;font-size:22px;cursor:pointer;}

  /* ---------- Hero ---------- */
  .hero{
    background:
      radial-gradient(1200px 500px at 15% -10%, rgba(59,125,216,.35), transparent 60%),
      radial-gradient(900px 400px at 90% 0%, rgba(240,128,60,.18), transparent 55%),
      linear-gradient(160deg, var(--navy-1) 0%, var(--navy-2) 100%);
    color:#fff;
    padding:72px 24px 88px;
    position:relative;
    overflow:hidden;
  }
  .hero::before{
    content:"";position:absolute;inset:0;
    background-image:
      linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
    background-size:48px 48px;
    mask-image:radial-gradient(ellipse 80% 60% at 50% 20%, black, transparent);
    pointer-events:none;
  }
  .hero-inner{max-width:920px;margin:0 auto;text-align:center;position:relative;z-index:1;}
  .hero-eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:13px;letter-spacing:2px;color:rgba(255,255,255,.65);
    text-transform:uppercase;margin-bottom:20px;
  }
  .hero-eyebrow::before,.hero-eyebrow::after{content:"";width:24px;height:1px;background:rgba(255,255,255,.35);}
  h1.hero-title{
    font-size:44px;font-weight:800;letter-spacing:6px;margin-bottom:26px;
    background:linear-gradient(180deg,#fff, #cfe0ff);
    -webkit-background-clip:text;background-clip:text;color:transparent;
  }
  .hero-desc{
    font-size:15.5px;color:rgba(255,255,255,.82);
    max-width:840px;margin:0 auto;text-align:justify;
    line-height:2;
  }
  .hero-cta{margin-top:36px;display:flex;gap:16px;justify-content:center;flex-wrap:wrap;}
  .btn-primary{
    background:linear-gradient(135deg,var(--orange),var(--orange-dark));
    color:#fff;font-weight:600;font-size:15px;
    padding:13px 30px;border-radius:26px;
    box-shadow:0 8px 20px rgba(224,107,39,.35);
    transition:transform .2s ease;
  }
  .btn-primary:hover{transform:translateY(-2px);}
  .btn-ghost{
    border:1px solid rgba(255,255,255,.35);color:#fff;font-size:15px;font-weight:500;
    padding:12px 28px;border-radius:26px;transition:background .2s ease, border-color .2s ease;
  }
  .btn-ghost:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.6);}

  /* ---------- Section shell ---------- */
  section{padding:88px 24px;}
  .section-inner{max-width:1180px;margin:0 auto;}
  .section-head{text-align:center;margin-bottom:56px;}
  .section-head .kicker{
    color:var(--orange-dark);font-size:13px;font-weight:700;letter-spacing:3px;text-transform:uppercase;
    display:block;margin-bottom:12px;
  }
  .section-head h2{font-size:30px;font-weight:800;color:var(--text-dark);letter-spacing:.5px;}
  .section-head h2 .accent{color:var(--blue-accent);}
  .section-head p{margin-top:14px;color:var(--text-muted);font-size:15px;}

  /* ---------- Core capabilities ---------- */
  .capabilities{background:var(--white);}
  .cap-grid{
    display:grid;grid-template-columns:repeat(2,1fr);gap:24px;
  }
  .cap-card{
    border:1px solid var(--card-border);
    border-radius:16px;
    padding:32px 30px;
    background:linear-gradient(180deg,#fff, #fbfcfe);
    transition:transform .25s ease, box-shadow .25s ease, border-color .25s ease;
    position:relative;
    overflow:hidden;
  }
  .cap-card::before{
    content:"";position:absolute;top:0;left:0;width:4px;height:0;
    background:linear-gradient(180deg,var(--blue-accent),var(--orange));
    transition:height .3s ease;
  }
  .cap-card:hover{transform:translateY(-6px);box-shadow:0 18px 40px rgba(23,59,115,.1);border-color:transparent;}
  .cap-card:hover::before{height:100%;}
  .cap-icon{
    width:52px;height:52px;border-radius:14px;
    background:var(--blue-light);
    display:flex;align-items:center;justify-content:center;
    margin-bottom:20px;
  }
  .cap-icon svg{width:26px;height:26px;stroke:var(--navy-2);}
  .cap-card h3{font-size:19px;font-weight:700;margin-bottom:10px;color:var(--text-dark);}
  .cap-card p.cap-desc{font-size:14px;color:var(--text-body);margin-bottom:20px;}
  .tag-row{display:flex;flex-wrap:wrap;gap:8px;}
  .tag{
    font-size:12.5px;color:var(--navy-2);
    background:var(--blue-light);
    padding:5px 12px;border-radius:6px;font-weight:500;
  }

  /* ---------- Feature showcase ---------- */
  .showcase{
    background:linear-gradient(135deg, var(--navy-1) 0%, var(--blue-accent) 100%);
    color:#fff;
  }
  .showcase .section-head h2{color:#fff;}
  .showcase .section-head .kicker{color:#ffd8b8;}
  .showcase-top{
    display:grid;grid-template-columns:0.85fr 1.15fr;gap:56px;align-items:center;margin-bottom:64px;
  }
  .showcase-copy h3{font-size:24px;font-weight:700;margin-bottom:16px;}
  .showcase-copy p{color:rgba(255,255,255,.78);font-size:14.5px;line-height:1.9;}
  .showcase-copy .mini-badges{display:flex;gap:10px;margin-top:24px;flex-wrap:wrap;}
  .mini-badges span{
    font-size:12.5px;padding:6px 14px;border-radius:16px;
    border:1px solid rgba(255,255,255,.3);color:#fff;
  }
  .mock-frame{
    background:rgba(255,255,255,.08);
    border:1px solid rgba(255,255,255,.18);
    border-radius:18px;
    padding:22px;
    backdrop-filter:blur(6px);
  }
  .mock-screen{
    background:linear-gradient(160deg,#8FB6E8,#5C8FCE);
    border-radius:12px;
    height:260px;
    position:relative;
    overflow:hidden;
    display:flex;align-items:center;justify-content:center;
  }
  .mock-screen .badge-id{
    position:absolute;top:16px;left:16px;
    background:rgba(255,255,255,.85);color:var(--navy-2);
    font-size:11px;font-weight:700;letter-spacing:1px;
    padding:4px 10px;border-radius:5px;
    z-index:3;
  }
  .mock-screen svg{width:120px;height:120px;opacity:.85;}

  .showcase-grid-title{
    text-align:center;font-size:14px;color:rgba(255,255,255,.65);
    letter-spacing:2px;margin-bottom:28px;text-transform:uppercase;
  }
  .preview-grid{
    display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-bottom:20px;
  }
  .preview-card{
    background:rgba(255,255,255,.07);
    border:1px solid rgba(255,255,255,.15);
    border-radius:14px;
    overflow:hidden;
    transition:transform .25s ease, background .25s ease;
    position:relative;
  }
  .preview-card:hover{transform:translateY(-4px);background:rgba(255,255,255,.12);}
  .card-bg{position:absolute;inset:0;z-index:1;overflow:hidden;}
  .card-bg img{width:100%;height:100%;object-fit:cover;display:block;}
  .card-mask{position:absolute;inset:0;z-index:2;background:linear-gradient(180deg, rgba(11,21,38,.35), rgba(11,21,38,.75));}
  .card-front{position:relative;z-index:3;}
  .preview-thumb{
    height:170px;
    display:flex;align-items:center;justify-content:center;
  }
  .preview-thumb svg{width:46px;height:46px;opacity:.95;}
  .preview-label{
    padding:14px 18px;font-size:14.5px;font-weight:600;color:#fff;
    display:flex;align-items:center;gap:8px;
    border-top:1px solid rgba(255,255,255,.12);
  }
  .preview-label .dot{width:6px;height:6px;border-radius:50%;background:var(--orange);flex-shrink:0;}

  .module-grid{
    display:grid;grid-template-columns:repeat(3,1fr);gap:18px;
  }
  .module-card{
    background:rgba(255,255,255,.06);
    border:1px solid rgba(255,255,255,.13);
    border-radius:12px;
    padding:22px 16px;
    text-align:center;
    transition:background .25s ease, transform .25s ease;
    position:relative;
    overflow:hidden;
  }
  .module-card:hover{background:rgba(255,255,255,.13);transform:translateY(-3px);}
  .module-icon{
    width:40px;height:40px;margin:0 auto 12px;
    border-radius:10px;background:rgba(255,255,255,.18);
    display:flex;align-items:center;justify-content:center;
    backdrop-filter:blur(2px);
  }
  .module-icon svg{width:20px;height:20px;}
  .module-card span{font-size:14px;font-weight:600;color:#fff;text-shadow:0 1px 3px rgba(0,0,0,.45);}

  /* ---------- CTA footer band ---------- */
  .cta-band{
    background:linear-gradient(120deg, var(--blue-accent), var(--navy-2));
    color:#fff;text-align:center;padding:80px 24px;
    position:relative;overflow:hidden;
  }
  .cta-band::after{
    content:"";position:absolute;width:480px;height:480px;border-radius:50%;
    background:radial-gradient(circle, rgba(240,128,60,.25), transparent 70%);
    top:-220px;right:-140px;
  }
  .cta-band h2{font-size:28px;font-weight:800;margin-bottom:12px;position:relative;}
  .cta-band p{color:rgba(255,255,255,.8);font-size:14.5px;margin-bottom:32px;position:relative;}
  .cta-band .btn-primary{position:relative;font-size:15.5px;padding:14px 36px;}


  /* ---------- Reveal-on-scroll ---------- */
  .reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease, transform .7s ease;}
  .reveal.in{opacity:1;transform:translateY(0);}

  /* ---------- Responsive ---------- */
  @media (max-width:960px){
    nav.main-nav{display:none;}
    .nav-toggle{display:block;}
    .cap-grid{grid-template-columns:1fr;}
    .showcase-top{grid-template-columns:1fr;gap:32px;}
    .preview-grid{grid-template-columns:1fr;}
    .module-grid{grid-template-columns:repeat(2,1fr);}
    h1.hero-title{font-size:30px;letter-spacing:3px;}
  }
  @media (max-width:560px){
    .module-grid{grid-template-columns:1fr 1fr;}
    section{padding:60px 18px;}
    h1.hero-title{font-size:24px;}
    .hero{padding:56px 18px 64px;}
    .btn-login{padding:8px 16px;font-size:13px;}
  }