:root{
    /* 科技蓝体系（中国移动蓝为识别色 + 深蓝/亮蓝增强层次） */
    --blue:#00A6E9;
    --blue-d:#0066CC;
    --blue-dd:#004A99;
    --blue-l:#4DC9F7;
    --blue-bg:rgba(0,166,233,.08);
    --blue-soft:rgba(0,166,233,.14);
    --bg:#f4f8fc;
    --bg-2:#eaf3fb;
    --card:#ffffff;
    --text:#16263a;
    --text-2:#3a4a5e;
    --muted:#6b7c8f;
    --border:#e4edf5;
    --shadow:0 10px 30px rgba(0,102,204,.08);
    --shadow-h:0 18px 40px rgba(0,102,204,.16);
    --radius:18px;
  }
  [data-theme="dark"]{
    --bg:#0b1320; --bg-2:#0f1a2c; --card:#13203a; --text:#eaf2fb;
    --text-2:#b9c8da; --muted:#8aa0b8; --border:#22344f;
    --blue-bg:rgba(0,166,233,.14); --shadow:0 10px 30px rgba(0,0,0,.4);
    --shadow-h:0 18px 40px rgba(0,0,0,.55);
  }
  *{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth}
  body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
    background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased;transition:background .3s,color .3s}
  .wrap{max-width:1180px;margin:0 auto;padding:0 22px}
  a{text-decoration:none;color:inherit}
  .btn{display:inline-flex;align-items:center;gap:6px;padding:12px 26px;border-radius:999px;
    font-size:15px;font-weight:700;transition:.25s;cursor:pointer;border:1px solid transparent}
  .btn-primary{background:linear-gradient(135deg,var(--blue-d),var(--blue));color:#fff;box-shadow:0 8px 20px rgba(0,166,233,.35)}
  .btn-primary:hover{transform:translateY(-3px);box-shadow:0 14px 28px rgba(0,166,233,.45)}
  .btn-ghost{background:transparent;color:var(--blue);border-color:var(--blue)}
  .btn-ghost:hover{background:var(--blue-bg)}
  .btn-white{background:#fff;color:var(--blue-d)}
  .btn-white:hover{transform:translateY(-3px);box-shadow:0 12px 26px rgba(0,0,0,.18)}

  /* 导航 */
  .nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.78);
    backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--border);transition:.3s}
  [data-theme="dark"] .nav{background:rgba(11,19,32,.72)}
  .nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
  .brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px}
  .brand .mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--blue-d),var(--blue));
    color:#fff;display:flex;align-items:center;justify-content:center;font-size:17px;box-shadow:0 4px 12px rgba(0,166,233,.4)}
  .nav-links{display:flex;gap:26px}
  .nav-links a{font-size:14.5px;color:var(--text-2);font-weight:600;position:relative;padding:4px 0}
  .nav-links a:hover{color:var(--blue)}
  .nav-links a::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;
    background:var(--blue);transition:.25s}
  .nav-links a:hover::after{width:100%}
  .nav-right{display:flex;align-items:center;gap:14px}
  .theme-toggle{width:38px;height:38px;border-radius:50%;border:1px solid var(--border);
    background:var(--card);color:var(--text-2);cursor:pointer;font-size:16px;display:flex;align-items:center;justify-content:center;transition:.2s}
  .theme-toggle:hover{color:var(--blue);border-color:var(--blue)}

  /* Hero */
  .hero{position:relative;overflow:hidden;background:linear-gradient(135deg,var(--blue-dd) 0%,var(--blue-d) 45%,var(--blue) 100%);
    color:#fff;padding:96px 0 86px;text-align:center}
  .hero::before,.hero::after{content:"";position:absolute;border-radius:50%;filter:blur(8px);opacity:.5}
  .hero::before{width:420px;height:420px;background:radial-gradient(circle,rgba(77,201,247,.55),transparent 70%);
    top:-140px;right:-80px}
  .hero::after{width:360px;height:360px;background:radial-gradient(circle,rgba(255,255,255,.25),transparent 70%);
    bottom:-150px;left:-60px}
  .hero .grid-bg{position:absolute;inset:0;opacity:.12;
    background-image:linear-gradient(rgba(255,255,255,.5) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.5) 1px,transparent 1px);
    background-size:46px 46px;mask-image:radial-gradient(circle at 50% 40%,#000,transparent 75%)}
  .hero .wrap{position:relative;z-index:2}
  .hero .badge{display:inline-block;padding:7px 16px;border:1px solid rgba(255,255,255,.45);border-radius:999px;
    font-size:13px;margin-bottom:20px;backdrop-filter:blur(4px)}
  .hero h1{font-size:44px;font-weight:800;letter-spacing:1px;line-height:1.25;margin-bottom:16px}
  .hero h1 .hl{background:linear-gradient(90deg,#fff,#bfe9ff);-webkit-background-clip:text;background-clip:text;color:transparent}
  .hero p.lead{font-size:18px;opacity:.93;max-width:700px;margin:0 auto 32px}
  .hero .actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

  /* 计数器条 */
  .stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:54px;
    background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);border-radius:20px;padding:26px}
  .stat .num{font-size:30px;font-weight:800;line-height:1}
  .stat .num .u{font-size:16px;font-weight:700;margin-left:2px}
  .stat .lbl{font-size:13px;opacity:.9;margin-top:6px}

  /* 通用区块 */
  section.block{padding:84px 0}
  .sec-head{text-align:center;max-width:680px;margin:0 auto 50px}
  .sec-head .tag{display:inline-block;color:var(--blue);font-weight:700;font-size:13px;letter-spacing:2px;
    background:var(--blue-bg);padding:5px 14px;border-radius:999px;margin-bottom:14px}
  .sec-head h2{font-size:30px;color:var(--text);margin-bottom:10px;letter-spacing:.5px}
  .sec-head p{color:var(--muted);font-size:15.5px}

  /* 服务项目 */
  .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
  .svc{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px 26px;
    transition:.28s;position:relative;overflow:hidden}
  .svc::before{content:"";position:absolute;left:0;top:0;width:100%;height:3px;
    background:linear-gradient(90deg,var(--blue-d),var(--blue));transform:scaleX(0);transform-origin:left;transition:.3s}
  .svc:hover{transform:translateY(-6px);box-shadow:var(--shadow-h);border-color:transparent}
  .svc:hover::before{transform:scaleX(1)}
  .svc .ico{width:50px;height:50px;border-radius:14px;background:var(--blue-bg);color:var(--blue-d);
    display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:800;margin-bottom:16px}
  .svc h3{font-size:18px;color:var(--text);margin-bottom:8px}
  .svc p{font-size:14px;color:var(--muted)}

  /* AI 工具箱 */
  .tools-section{background:var(--card);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
  .grid-9{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
  .mini{display:flex;align-items:center;gap:13px;background:var(--bg);border:1px solid var(--border);
    border-radius:14px;padding:16px 18px;transition:.25s;position:relative}
  .mini:hover{background:var(--blue-bg);border-color:var(--blue);transform:translateY(-3px)}
  .mini .m-ico{width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,var(--blue-d),var(--blue));
    color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:16px;flex:none}
  .mini .m-t{font-size:14.5px;font-weight:600;color:var(--text)}
  .mini .m-t small{display:block;font-weight:500;color:var(--muted);font-size:12px}
  .mini.soon{opacity:.6;cursor:not-allowed}
  .mini.soon:hover{transform:none;background:var(--bg);border-color:var(--border)}
  .mini .badge-soon{position:absolute;top:8px;right:10px;font-size:10px;color:var(--blue-d);
    background:var(--blue-bg);padding:2px 8px;border-radius:999px;font-weight:700}
  .tools-cta{text-align:center;margin-top:34px}

  /* 关于 + 价值 */
  .about{display:grid;grid-template-columns:1.05fr .95fr;gap:46px;align-items:center}
  .about h2{font-size:30px;color:var(--text);margin-bottom:16px}
  .about p{color:var(--muted);margin-bottom:14px;font-size:15px}
  .about .pill{display:inline-block;background:var(--blue-bg);color:var(--blue-d);font-weight:700;
    padding:6px 14px;border-radius:999px;font-size:13px;margin-bottom:16px}
  .values{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
  .val{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:20px;transition:.25s}
  .val:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--blue)}
  .val .vt{font-weight:800;color:var(--blue-d);font-size:17px;margin-bottom:4px}
  .val .vd{font-size:13px;color:var(--muted)}

  /* 新闻 */
  .news{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
  .post{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:.28s;display:block}
  .post:hover{transform:translateY(-6px);box-shadow:var(--shadow-h)}
  .post .thumb{height:150px;background:linear-gradient(135deg,var(--blue-dd),var(--blue-l));position:relative}
  .post .thumb span{position:absolute;left:16px;bottom:14px;background:rgba(255,255,255,.92);color:var(--blue-d);
    font-size:12px;font-weight:700;padding:4px 12px;border-radius:999px}
  .post .body{padding:20px 22px}
  .post .date{font-size:12.5px;color:var(--blue);font-weight:600}
  .post h3{font-size:16.5px;color:var(--text);margin:7px 0 8px;line-height:1.45}
  .post p{font-size:13.5px;color:var(--muted)}

  /* 联系 */
  .contact{background:linear-gradient(135deg,var(--blue-dd),var(--blue));color:#fff;border-radius:24px;
    padding:50px;display:grid;grid-template-columns:1fr 1fr;gap:34px}
  .contact h2{font-size:27px;margin-bottom:12px}
  .contact .office{margin-bottom:18px}
  .contact .office .city{font-weight:800;font-size:16px;margin-bottom:5px;display:flex;align-items:center;gap:8px}
  .contact .office .addr{font-size:14.5px;opacity:.92}
  .contact .line{font-size:15.5px;margin-top:8px}
  .contact .line b{font-weight:800}
  .contact .side{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.25);border-radius:16px;padding:24px}
  .contact .side .t{font-weight:800;font-size:16px;margin-bottom:12px}
  .contact .side .item{font-size:14px;opacity:.92;margin-bottom:10px;display:flex;gap:8px;align-items:flex-start}
  .contact .side .item b{font-weight:700}

  /* 页脚 */
  .footer{background:var(--card);border-top:1px solid var(--border);padding:34px 0 28px;color:var(--muted);font-size:13.5px}
  .footer .wrap{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:14px}
  .footer .brand{font-size:16px;color:var(--text)}
  .footer .brand .mark{width:26px;height:26px;border-radius:8px;background:linear-gradient(135deg,var(--blue-d),var(--blue));
    color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:13px;margin-right:6px}

  .reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
  .reveal.in{opacity:1;transform:none}

  @media (max-width:900px){
    .grid-3,.news{grid-template-columns:repeat(2,1fr)}
    .grid-9{grid-template-columns:repeat(2,1fr)}
    .about,.contact{grid-template-columns:1fr}
    .stats{grid-template-columns:repeat(3,1fr)}
    .nav-links{display:none}
    .hero h1{font-size:32px}
  }
  @media (max-width:560px){
    .grid-3,.news,.grid-9{grid-template-columns:1fr}
    .hero h1{font-size:27px}
    .contact{padding:32px 22px}
    section.block{padding:60px 0}
  }