:root{
    --primary:#0A2A52; --primary-2:#14417F; --primary-3:#1B54A0;
    --accent:#2E7CF6; --accent-h:#1B62D6; --accent-soft:#EAF1FE;
    --gold:#F2A93B; --green:#16A34A; --red:#DC2626;
    --bg:#FFFFFF; --bg-soft:#F4F7FB; --bg-tint:#EEF3FA;
    --text:#14213D; --muted:#5A6B85; --border:#E3E9F2;
    --shadow:0 6px 24px rgba(10,42,82,.08);
    --shadow-lg:0 16px 48px rgba(10,42,82,.16);
    --radius:14px; --radius-sm:8px;
    --maxw:1200px;
  }
  *{margin:0;padding:0;box-sizing:border-box}
  html{scroll-behavior:smooth;scroll-padding-top:78px}
  body{
    font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,"Segoe UI",Roboto,sans-serif;
    color:var(--text);background:var(--bg);line-height:1.7;font-size:16px;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  ul{list-style:none}
  .wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
  section{position:relative}
  .sec-pad{padding:96px 0}
  .sec-head{text-align:center;max-width:760px;margin:0 auto 56px}
  .eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:2px;color:var(--accent);
    background:var(--accent-soft);padding:6px 14px;border-radius:999px;margin-bottom:16px}
  .sec-head h2{font-size:34px;font-weight:800;line-height:1.25;letter-spacing:.5px;margin-bottom:14px}
  .sec-head p{color:var(--muted);font-size:16px}
  .sec-head .bar{width:56px;height:4px;border-radius:4px;margin:20px auto 0;
    background:linear-gradient(90deg,var(--accent),var(--primary-3))}

  /* Buttons */
  .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
    font-size:15px;font-weight:600;border-radius:var(--radius-sm);padding:13px 26px;
    cursor:pointer;border:1.5px solid transparent;transition:all .25s ease;white-space:nowrap}
  .btn-primary{background:var(--accent);color:#fff;box-shadow:0 8px 20px rgba(46,124,246,.32)}
  .btn-primary:hover{background:var(--accent-h);transform:translateY(-2px);box-shadow:0 12px 26px rgba(46,124,246,.4)}
  .btn-ghost{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.5);backdrop-filter:blur(4px)}
  .btn-ghost:hover{background:rgba(255,255,255,.22);transform:translateY(-2px)}
  .btn-outline{background:#fff;color:var(--primary);border-color:var(--border)}
  .btn-outline:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
  .btn-block{width:100%}

  /* ============ NAV ============ */
  .nav{position:fixed;top:0;left:0;right:0;z-index:100;transition:all .3s ease;
    background:rgba(10,42,82,0);}
  .nav-inner{max-width:var(--maxw);margin:0 auto;padding:0 24px;height:72px;
    display:flex;align-items:center;justify-content:space-between}
  .logo{display:flex;align-items:center;gap:10px;font-size:21px;font-weight:800;color:#fff;letter-spacing:1px}
  .logo .mark{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;
    background:linear-gradient(135deg,var(--accent),#5B9BFF);font-size:18px;color:#fff;box-shadow:0 4px 12px rgba(46,124,246,.5)}
  .nav-links{display:flex;align-items:center;gap:6px}
  .nav-links a{color:rgba(255,255,255,.82);font-size:14.5px;font-weight:500;padding:8px 12px;border-radius:7px;transition:all .2s}
  .nav-links a:hover,.nav-links a.active{color:#fff;background:rgba(255,255,255,.14)}
  .nav-cta{background:var(--accent);color:#fff!important;padding:10px 20px!important;border-radius:8px;font-weight:600;
    box-shadow:0 6px 16px rgba(46,124,246,.4)}
  .nav-cta:hover{background:var(--accent-h)!important}
  .nav.scrolled{background:rgba(255,255,255,.97);box-shadow:0 2px 20px rgba(10,42,82,.1);backdrop-filter:blur(10px)}
  .nav.scrolled .logo{color:var(--primary)}
  .nav.scrolled .nav-links a{color:var(--muted)}
  .nav.scrolled .nav-links a:hover,.nav.scrolled .nav-links a.active{color:var(--accent);background:var(--accent-soft)}
  .burger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
  .burger span{width:24px;height:2.5px;background:#fff;border-radius:2px;transition:all .3s}
  .nav.scrolled .burger span{background:var(--primary)}

  /* Dropdown nav (产品体系) */
  .nav-item-dd{position:relative}
  .nav-item-dd .dd-trigger{display:flex;align-items:center;gap:4px;cursor:pointer}
  .nav-item-dd .caret{font-size:10px;transition:transform .2s}
  .nav-item-dd .dd-menu{position:absolute;top:calc(100% + 10px);left:0;min-width:226px;background:#fff;
    border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow-lg);padding:8px;
    display:flex;flex-direction:column;gap:2px;opacity:0;visibility:hidden;transform:translateY(8px);
    transition:all .25s ease;z-index:50}
  .nav-item-dd:hover .dd-menu{opacity:1;visibility:visible;transform:translateY(0)}
  .nav-item-dd .dd-menu a{color:var(--muted)!important;font-size:14px;padding:10px 14px;border-radius:8px;white-space:nowrap}
  .nav-item-dd .dd-menu a:hover{color:var(--accent)!important;background:var(--accent-soft)}
  .nav:not(.scrolled) .nav-item-dd .dd-trigger{color:rgba(255,255,255,.82)}
  .nav:not(.scrolled) .nav-item-dd:hover .dd-trigger{color:#fff}

  /* ============ HERO ============ */
  .hero{background:linear-gradient(135deg,#071E3D 0%,var(--primary) 45%,var(--primary-2) 100%);
    color:#fff;overflow:hidden;padding:150px 0 90px;position:relative}
  .hero::before{content:"";position:absolute;top:-120px;right:-80px;width:520px;height:520px;border-radius:50%;
    background:radial-gradient(circle,rgba(46,124,246,.28),transparent 68%);}
  .hero::after{content:"";position:absolute;bottom:-160px;left:-100px;width:460px;height:460px;border-radius:50%;
    background:radial-gradient(circle,rgba(91,155,255,.18),transparent 70%);}
  .hero .wrap{position:relative;z-index:2}
  .hero-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center}
  .hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.12);
    border:1px solid rgba(255,255,255,.22);padding:7px 16px;border-radius:999px;font-size:13.5px;
    color:#CFE0FF;margin-bottom:24px;backdrop-filter:blur(4px)}
  .hero-badge .dot{width:7px;height:7px;border-radius:50%;background:var(--gold);box-shadow:0 0 0 4px rgba(242,169,59,.25)}
  .hero h1{font-size:48px;font-weight:800;line-height:1.22;letter-spacing:1px;margin-bottom:20px}
  .hero h1 .hl{color:#6FA8FF}
  .hero-sub{font-size:18px;color:#B9CCE8;line-height:1.8;margin-bottom:14px;max-width:560px}
  .hero-sub b{color:#fff;font-weight:600}
  .hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 32px}
  .hero-tags span{font-size:13.5px;color:#DCE8FB;background:rgba(255,255,255,.09);
    border:1px solid rgba(255,255,255,.16);padding:6px 14px;border-radius:8px}
  .hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:26px}
  .hero-trust{font-size:13.5px;color:#8FA9CE;display:flex;align-items:center;gap:8px}
  .hero-trust svg{flex:none}

  /* CSS system mockup */
  .mockup{background:#fff;border-radius:16px;box-shadow:0 30px 70px rgba(0,0,0,.42);overflow:hidden;
    transform:perspective(1400px) rotateY(-9deg) rotateX(3deg);border:1px solid rgba(255,255,255,.2)}
  .mock-bar{height:34px;background:#0F2E5A;display:flex;align-items:center;gap:7px;padding:0 14px}
  .mock-bar i{width:10px;height:10px;border-radius:50%;display:block}
  .mock-bar i:nth-child(1){background:#FF5F57}.mock-bar i:nth-child(2){background:#FEBC2E}.mock-bar i:nth-child(3){background:#28C840}
  .mock-bar span{margin-left:10px;font-size:11px;color:#7E9BC4}
  .mock-body{display:flex;height:290px;background:#F5F8FC}
  .mock-side{width:60px;background:#0A2A52;padding:12px 0;display:flex;flex-direction:column;align-items:center;gap:14px}
  .mock-side i{width:26px;height:26px;border-radius:7px;background:rgba(255,255,255,.14);display:block}
  .mock-side i.on{background:var(--accent)}
  .mock-main{flex:1;padding:16px}
  .mock-kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:14px}
  .mock-kpi{background:#fff;border-radius:9px;padding:10px;box-shadow:0 2px 8px rgba(10,42,82,.06)}
  .mock-kpi .n{font-size:19px;font-weight:800;color:var(--primary)}
  .mock-kpi .l{font-size:10px;color:var(--muted);margin-top:2px}
  .mock-kpi .n.b{color:var(--accent)}.mock-kpi .n.g{color:var(--green)}
  .mock-chart{background:#fff;border-radius:9px;padding:12px;box-shadow:0 2px 8px rgba(10,42,82,.06);height:118px}
  .mock-chart .t{font-size:11px;color:var(--muted);margin-bottom:10px;font-weight:600}
  .bars{display:flex;align-items:flex-end;gap:9px;height:74px}
  .bars b{flex:1;border-radius:4px 4px 0 0;background:linear-gradient(180deg,var(--accent),#7FB0FF);display:block;animation:grow 1.2s ease both}
  .bars b:nth-child(odd){background:linear-gradient(180deg,#0F3E7A,#3D74C4)}
  @keyframes grow{from{height:0!important}}
  .mock-list{margin-top:12px;display:flex;flex-direction:column;gap:7px}
  .mock-row{background:#fff;border-radius:7px;height:26px;display:flex;align-items:center;gap:8px;padding:0 10px;box-shadow:0 1px 4px rgba(10,42,82,.05)}
  .mock-row i{width:8px;height:8px;border-radius:50%;background:var(--accent);flex:none}
  .mock-row .ln{flex:1;height:6px;border-radius:3px;background:#E7EDF6}
  .mock-row .st{width:32px;height:12px;border-radius:6px;background:var(--accent-soft)}
  .mock-row .st.g{background:#DCFCE7}

  /* ============ STATS ============ */
  .stats{background:#fff;padding:0;position:relative;z-index:3;margin-top:-46px}
  .stats-card{max-width:1040px;margin:0 auto;background:#fff;border-radius:18px;box-shadow:var(--shadow-lg);
    display:grid;grid-template-columns:repeat(4,1fr);padding:38px 20px;border:1px solid var(--border)}
  .stat{text-align:center;position:relative}
  .stat:not(:last-child)::after{content:"";position:absolute;right:0;top:12%;height:76%;width:1px;background:var(--border)}
  .stat .num{font-size:42px;font-weight:800;color:var(--accent);line-height:1;letter-spacing:1px}
  .stat .num .u{font-size:22px;margin-left:2px}
  .stat .lbl{color:var(--muted);font-size:14px;margin-top:10px}

  /* ============ MODULES ============ */
  .modules{background:var(--bg-soft)}
  .chain{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:6px;
    background:#fff;border:1px solid var(--border);border-radius:14px;padding:18px 22px;margin-bottom:44px;box-shadow:var(--shadow)}
  .chain-node{display:flex;align-items:center;gap:8px;font-weight:600;color:var(--primary);font-size:15px;
    background:var(--bg-tint);padding:9px 16px;border-radius:9px}
  .chain-node .ic{color:var(--accent);display:flex}
  .chain-arrow{color:var(--accent);font-size:18px;font-weight:700;opacity:.6}
  .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
  .card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:30px 26px;
    box-shadow:var(--shadow);transition:transform .3s ease,box-shadow .3s ease,border-color .3s}
  .card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:#CBDCF5}
  .card .ic{width:52px;height:52px;border-radius:13px;display:grid;place-items:center;
    background:var(--accent-soft);color:var(--accent);margin-bottom:18px;transition:all .3s}
  .card:hover .ic{background:var(--accent);color:#fff;transform:scale(1.06)}
  .card h3{font-size:19px;font-weight:700;margin-bottom:10px;color:var(--primary)}
  .card p{color:var(--muted);font-size:14.5px;line-height:1.75}
  .tip-bar{margin-top:36px;background:linear-gradient(90deg,var(--accent-soft),#F7FAFF);
    border:1px dashed var(--accent);border-radius:12px;padding:20px 26px;display:flex;align-items:center;gap:14px}
  .tip-bar .ic{color:var(--accent);flex:none}
  .tip-bar p{color:var(--primary);font-size:15px;font-weight:500}
  .tip-bar b{color:var(--accent)}

  /* ============ PRODUCTS ============ */
  .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
  .chain-ai{margin-left:10px;background:linear-gradient(90deg,var(--accent),#5B9BFF);color:#fff;font-size:13px;
    font-weight:700;padding:8px 16px;border-radius:999px;box-shadow:0 6px 16px rgba(46,124,246,.35);white-space:nowrap}
  .prod{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:30px 28px;
    box-shadow:var(--shadow);transition:all .3s;display:flex;flex-direction:column}
  .prod:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:#CBDCF5}
  .prod-head{display:flex;align-items:center;gap:14px;margin-bottom:6px}
  .prod-head .ic{width:50px;height:50px;flex:none;border-radius:13px;display:grid;place-items:center;
    background:var(--accent-soft);color:var(--accent);transition:all .3s}
  .prod:hover .prod-head .ic{background:var(--accent);color:#fff}
  .prod-head h3{font-size:20px;font-weight:800;color:var(--primary)}
  .prod .pos{color:var(--accent);font-size:14px;font-weight:600;margin-bottom:16px}
  .prod ul{display:flex;flex-direction:column;gap:9px;margin-bottom:18px}
  .prod li{position:relative;padding-left:20px;color:var(--muted);font-size:14.5px;line-height:1.65}
  .prod li::before{content:"";position:absolute;left:2px;top:9px;width:7px;height:7px;border-radius:50%;background:var(--accent)}
  .prod .ai{margin-top:auto;background:linear-gradient(90deg,var(--accent-soft),#F7FAFF);
    border-left:3px solid var(--accent);border-radius:0 9px 9px 0;padding:12px 16px;font-size:13.5px;
    color:var(--primary);line-height:1.7}
  .prod .ai b{color:var(--accent)}
  .ai-card{grid-column:1/-1;background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;border:none;
    border-radius:var(--radius);padding:36px 34px;box-shadow:var(--shadow-lg);display:grid;
    grid-template-columns:1.05fr 1fr;gap:34px;align-items:center;position:relative;overflow:hidden}
  .ai-card::before{content:"";position:absolute;top:-90px;right:-60px;width:340px;height:340px;border-radius:50%;
    background:radial-gradient(circle,rgba(46,124,246,.35),transparent 70%)}
  .ai-card .l{position:relative;z-index:2}
  .ai-card .tag{display:inline-flex;align-items:center;gap:7px;background:rgba(255,255,255,.14);
    border:1px solid rgba(255,255,255,.25);color:#CFE0FF;font-size:12.5px;padding:5px 13px;border-radius:999px;margin-bottom:16px}
  .ai-card h3{font-size:25px;font-weight:800;margin-bottom:8px}
  .ai-card .pos{color:#8FB6F5;font-size:15px;font-weight:600;margin-bottom:14px}
  .ai-card p{color:#C6D6EE;font-size:14.5px;line-height:1.8}
  .ai-card ul{display:flex;flex-direction:column;gap:12px;position:relative;z-index:2}
  .ai-card li{display:flex;gap:12px;align-items:flex-start;background:rgba(255,255,255,.08);
    border:1px solid rgba(255,255,255,.14);border-radius:11px;padding:13px 16px;font-size:14px;color:#E4EDFB;line-height:1.6}
  .ai-card li .n{flex:none;width:24px;height:24px;border-radius:7px;background:var(--accent);color:#fff;
    display:grid;place-items:center;font-size:12.5px;font-weight:700}
  .grow-line{margin-top:38px;text-align:center;font-size:17px;color:var(--primary);font-weight:600;line-height:1.8}
  .grow-line b{color:var(--accent)}

  /* ============ PEIPAO BAND ============ */
  .peipao{background:linear-gradient(135deg,#071E3D,var(--primary) 55%,var(--primary-2));color:#fff;overflow:hidden;position:relative}
  .peipao::before{content:"";position:absolute;bottom:-140px;right:-80px;width:460px;height:460px;border-radius:50%;
    background:radial-gradient(circle,rgba(46,124,246,.22),transparent 70%)}
  .peipao .wrap{position:relative;z-index:2}
  .peipao .sec-head h2{color:#fff}
  .peipao .sec-head p{color:#B9CCE8}
  .peipao .eyebrow{background:rgba(255,255,255,.12);color:#8FB6F5}
  .peipao .bar{background:linear-gradient(90deg,var(--gold),var(--accent))}
  .pp-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:40px}
  .pp{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius);
    padding:30px 26px;backdrop-filter:blur(4px);transition:all .3s}
  .pp:hover{background:rgba(255,255,255,.12);transform:translateY(-5px)}
  .pp .no{font-size:13px;font-weight:800;color:var(--gold);letter-spacing:2px;margin-bottom:12px}
  .pp h3{font-size:19px;font-weight:700;margin-bottom:10px;display:flex;align-items:center;gap:10px}
  .pp h3 .ic{color:#7FB0FF;flex:none}
  .pp p{color:#C6D6EE;font-size:14.5px;line-height:1.75}
  .pp-quote{text-align:center;font-size:20px;font-weight:700;color:#fff;line-height:1.7;
    padding:28px 20px 0;border-top:1px solid rgba(255,255,255,.14)}
  .pp-quote b{color:var(--gold)}

  /* ============ ADVANTAGES ============ */
  .adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
  .adv{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:32px 28px;
    box-shadow:var(--shadow);transition:all .3s;position:relative;overflow:hidden}
  .adv::before{content:"";position:absolute;top:0;left:0;width:100%;height:4px;background:linear-gradient(90deg,var(--accent),var(--primary-3));
    transform:scaleX(0);transform-origin:left;transition:transform .35s}
  .adv:hover::before{transform:scaleX(1)}
  .adv:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
  .adv.feature{background:linear-gradient(150deg,var(--primary),var(--primary-2));color:#fff;border:none}
  .adv.feature h3{color:#fff}.adv.feature p{color:#C6D6EE}
  .adv.feature .num-badge{color:#6FA8FF}
  .adv .num-badge{font-size:14px;font-weight:800;color:var(--accent);letter-spacing:1px;margin-bottom:14px;display:block}
  .adv h3{font-size:20px;font-weight:700;margin-bottom:12px;color:var(--primary);display:flex;align-items:center;gap:10px}
  .adv p{color:var(--muted);font-size:14.5px}
  .adv-ic{color:var(--accent);flex:none}
  .adv.feature .adv-ic{color:#7FB0FF}

  /* ============ TECH ============ */
  .tech{background:var(--bg-soft)}
  .tech-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
  .tech-item{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:26px 24px;
    display:flex;gap:18px;align-items:flex-start;box-shadow:var(--shadow);transition:all .3s}
  .tech-item:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:#CBDCF5}
  .tech-item .ic{width:46px;height:46px;flex:none;border-radius:12px;display:grid;place-items:center;
    background:var(--accent-soft);color:var(--accent)}
  .tech-item h3{font-size:17px;font-weight:700;color:var(--primary);margin-bottom:7px}
  .tech-item p{color:var(--muted);font-size:14px;line-height:1.7}

  /* ============ PROCESS ============ */
  .steps{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;position:relative;margin-top:20px}
  .steps::before{content:"";position:absolute;top:34px;left:8%;right:8%;height:2px;
    background:repeating-linear-gradient(90deg,var(--border) 0 8px,transparent 8px 16px);z-index:0}
  .step{text-align:center;position:relative;z-index:1}
  .step .circle{width:68px;height:68px;border-radius:50%;margin:0 auto 18px;display:grid;place-items:center;
    background:#fff;border:2px solid var(--accent);color:var(--accent);font-size:22px;font-weight:800;
    box-shadow:0 6px 18px rgba(46,124,246,.18);transition:all .3s;position:relative}
  .step:hover .circle{background:var(--accent);color:#fff;transform:scale(1.08)}
  .step h3{font-size:17px;font-weight:700;color:var(--primary);margin-bottom:8px}
  .step p{color:var(--muted);font-size:13.5px;line-height:1.65;padding:0 6px}
  .step .free{display:inline-block;margin-top:8px;font-size:11.5px;color:var(--green);background:#DCFCE7;padding:2px 9px;border-radius:6px;font-weight:600}

  /* ============ TEAM ============ */
  .team{background:var(--bg-soft)}
  .team-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
  .member{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:36px 28px;text-align:center;
    box-shadow:var(--shadow);transition:all .3s}
  .member:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
  .avatar{width:88px;height:88px;border-radius:50%;margin:0 auto 20px;display:grid;place-items:center;
    background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;font-size:34px;font-weight:800;
    box-shadow:0 10px 24px rgba(46,124,246,.3)}
  .member h3{font-size:20px;font-weight:700;color:var(--primary);margin-bottom:6px}
  .member .role{font-size:13px;color:var(--accent);font-weight:600;margin-bottom:16px;letter-spacing:.5px}
  .member p{color:var(--muted);font-size:14.5px;text-align:left;line-height:1.75}

  /* ============ CASES ============ */
  .case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
  .case{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;
    box-shadow:var(--shadow);transition:all .3s;display:flex;flex-direction:column}
  .case:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
  .case-top{height:8px;background:linear-gradient(90deg,var(--accent),var(--primary-3))}
  .case-body{padding:28px 26px;flex:1;display:flex;flex-direction:column}
  .case-tag{display:inline-block;font-size:12px;font-weight:600;color:var(--accent);background:var(--accent-soft);
    padding:4px 12px;border-radius:6px;margin-bottom:14px;align-self:flex-start}
  .case h3{font-size:18px;font-weight:700;color:var(--primary);margin-bottom:16px}
  .case .row{display:flex;gap:10px;font-size:14px;margin-bottom:12px;color:var(--muted)}
  .case .row .k{color:var(--primary);font-weight:600;flex:none}
  .case .result{margin-top:auto;padding-top:16px;border-top:1px dashed var(--border);color:var(--text);font-size:14.5px}
  .case .result b{color:var(--accent)}

  /* ============ FAQ ============ */
  .faq{background:var(--bg-soft)}
  .faq-list{max-width:840px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
  .faq-item{background:#fff;border:1px solid var(--border);border-radius:12px;overflow:hidden;transition:all .3s}
  .faq-item.open{border-color:var(--accent);box-shadow:var(--shadow)}
  .faq-q{width:100%;background:none;border:none;cursor:pointer;padding:22px 26px;display:flex;
    align-items:center;justify-content:space-between;gap:16px;text-align:left;font-size:16.5px;
    font-weight:600;color:var(--primary);font-family:inherit}
  .faq-q .sign{width:26px;height:26px;flex:none;border-radius:50%;background:var(--accent-soft);color:var(--accent);
    display:grid;place-items:center;font-size:18px;font-weight:700;transition:transform .3s}
  .faq-item.open .sign{transform:rotate(45deg);background:var(--accent);color:#fff}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .38s ease}
  .faq-a .inner{padding:0 26px 24px;color:var(--muted);font-size:15px;line-height:1.8}

  /* ============ CTA / CONTACT ============ */
  .contact{background:linear-gradient(135deg,#071E3D,var(--primary) 50%,var(--primary-2));color:#fff;overflow:hidden;position:relative}
  .contact::before{content:"";position:absolute;top:-100px;left:-60px;width:420px;height:420px;border-radius:50%;
    background:radial-gradient(circle,rgba(46,124,246,.25),transparent 70%)}
  .contact .wrap{position:relative;z-index:2}
  .contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
  .contact-left h2{font-size:34px;font-weight:800;line-height:1.3;margin-bottom:16px}
  .contact-left p{color:#B9CCE8;font-size:16px;margin-bottom:28px;line-height:1.8}
  .contact-info{display:flex;flex-direction:column;gap:16px}
  .ci{display:flex;align-items:center;gap:14px;font-size:15px;color:#DCE8FB}
  .ci .ic{width:42px;height:42px;border-radius:11px;background:rgba(255,255,255,.1);display:grid;place-items:center;color:#7FB0FF;flex:none}
  .form-card{background:#fff;border-radius:18px;padding:34px 32px;box-shadow:0 30px 70px rgba(0,0,0,.35);color:var(--text)}
  .form-card h3{font-size:21px;font-weight:700;color:var(--primary);margin-bottom:6px}
  .form-card .sub{color:var(--muted);font-size:13.5px;margin-bottom:22px}
  .field{margin-bottom:16px}
  .field label{display:block;font-size:13.5px;font-weight:600;color:var(--primary);margin-bottom:7px}
  .field label .req{color:var(--red)}
  .field input,.field textarea{width:100%;border:1.5px solid var(--border);border-radius:9px;padding:12px 14px;
    font-size:14.5px;font-family:inherit;color:var(--text);transition:all .2s;background:#FBFCFE}
  .field input:focus,.field textarea:focus{outline:none;border-color:var(--accent);background:#fff;box-shadow:0 0 0 3px rgba(46,124,246,.12)}
  .field textarea{resize:vertical;min-height:82px}
  .field .err{color:var(--red);font-size:12.5px;margin-top:5px;display:none}
  .field.invalid input{border-color:var(--red)}
  .field.invalid .err{display:block}
  .form-success{text-align:center;padding:30px 10px;display:none}
  .form-success .ok{width:70px;height:70px;border-radius:50%;background:#DCFCE7;color:var(--green);
    display:grid;place-items:center;margin:0 auto 20px;font-size:36px}
  .form-success h3{color:var(--primary);font-size:21px;margin-bottom:10px}
  .form-success p{color:var(--muted);font-size:14.5px;margin-bottom:20px}

  /* ============ FOOTER ============ */
  .footer{background:#06172E;color:#93A9C8;padding:56px 0 0}
  .foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:40px}
  .footer .logo{color:#fff;margin-bottom:16px}
  .footer h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px}
  .footer a{color:#93A9C8;font-size:14px;transition:color .2s;display:block;padding:5px 0}
  .footer a:hover{color:#6FA8FF}
  .footer .desc{font-size:14px;line-height:1.8;max-width:300px}
  .foot-contact div{display:flex;gap:10px;align-items:flex-start;font-size:14px;margin-bottom:12px}
  .foot-contact svg{flex:none;margin-top:3px;color:#6FA8FF}
  .foot-bottom{border-top:1px solid rgba(255,255,255,.1);padding:22px 0;text-align:center;font-size:13px;color:#6C82A3}

  /* Floating CTA (mobile) */
  .float-cta{display:none}

  /* Reveal animation */
  .reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
  .reveal.in{opacity:1;transform:none}

  /* ============ RESPONSIVE ============ */
  @media(max-width:1024px){
    .hero-grid{grid-template-columns:1fr;gap:44px}
    .mockup{transform:none;max-width:520px;margin:0 auto}
    .hero h1{font-size:40px}
    .grid-3,.adv-grid,.tech-grid,.team-grid,.case-grid{grid-template-columns:repeat(2,1fr)}
    .grid-2{grid-template-columns:1fr}
    .ai-card{grid-template-columns:1fr;gap:24px}
    .steps{grid-template-columns:repeat(3,1fr);gap:26px}
    .steps::before{display:none}
    .contact-grid{grid-template-columns:1fr;gap:40px}
    .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  }
  @media(max-width:768px){
    .sec-pad{padding:66px 0}
    .sec-head h2{font-size:27px}
    .sec-head{margin-bottom:40px}
    .nav-links{position:fixed;top:72px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;
      gap:0;padding:12px 20px 20px;box-shadow:0 12px 30px rgba(10,42,82,.16);transform:translateY(-140%);
      transition:transform .35s ease;z-index:-1}
    .nav-links.open{transform:translateY(0)}
    .nav-links a{color:var(--text)!important;padding:14px 12px;border-radius:8px;font-size:15.5px}
    .nav-links a:hover,.nav-links a.active{background:var(--accent-soft)!important;color:var(--accent)!important}
    .nav-cta{text-align:center;margin-top:8px}
    .burger{display:flex}
    .hero{padding:120px 0 70px}
    .hero h1{font-size:31px}
    .hero-sub{font-size:16px}
    .stats-card{grid-template-columns:repeat(2,1fr);gap:26px 0;padding:30px 12px}
    .stat:nth-child(2)::after{display:none}
    .stat .num{font-size:34px}
    .grid-3,.adv-grid,.tech-grid,.team-grid,.case-grid{grid-template-columns:1fr}
    .pp-grid{grid-template-columns:1fr}
    .pp-quote{font-size:17px}
    .chain-ai{margin-left:0;width:100%;text-align:center}
    .steps{grid-template-columns:1fr;gap:22px}
    .step{display:flex;gap:16px;text-align:left;align-items:flex-start}
    .step .circle{margin:0;flex:none;width:54px;height:54px;font-size:19px}
    .chain{padding:16px}
    .chain-node{font-size:13.5px;padding:8px 12px}
    .foot-grid{grid-template-columns:1fr}
    .contact-left h2{font-size:27px}
    .float-cta{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:99;background:#fff;
      box-shadow:0 -4px 20px rgba(10,42,82,.14);padding:10px 16px;gap:12px;align-items:center}
    .float-cta .txt{flex:1;font-size:13px;color:var(--muted);line-height:1.4}
    .float-cta .txt b{color:var(--primary);font-size:14.5px;display:block}
    body{padding-bottom:64px}
  }
  @media(prefers-reduced-motion:reduce){
    *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
    .reveal{opacity:1;transform:none}
  }

  /* ============ PRODUCT DETAIL PAGES ============ */
  /* Product hero (dark, sits under fixed nav) */
  .phero{background:linear-gradient(135deg,#071E3D 0%,var(--primary) 45%,var(--primary-2) 100%);
    color:#fff;overflow:hidden;position:relative;padding:104px 0 80px}
  .phero::before{content:"";position:absolute;top:-120px;right:-80px;width:520px;height:520px;border-radius:50%;
    background:radial-gradient(circle,rgba(46,124,246,.28),transparent 68%)}
  .phero::after{content:"";position:absolute;bottom:-160px;left:-100px;width:460px;height:460px;border-radius:50%;
    background:radial-gradient(circle,rgba(91,155,255,.16),transparent 70%)}
  .phero .wrap{position:relative;z-index:2}
  .pb-crumb{font-size:13.5px;color:#9FB6D6;margin-bottom:22px}
  .pb-crumb a{color:#9FC4FF;font-weight:500}
  .pb-crumb a:hover{color:#fff}
  .pb-crumb i{margin:0 8px;color:rgba(255,255,255,.32);font-style:normal}
  .phero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.12);
    border:1px solid rgba(255,255,255,.22);padding:7px 16px;border-radius:999px;font-size:13.5px;color:#CFE0FF}
  .phero-badge .dot{width:7px;height:7px;border-radius:50%;background:var(--gold);box-shadow:0 0 0 4px rgba(242,169,59,.25)}
  .phero h1{font-size:46px;font-weight:800;line-height:1.2;margin:18px 0 16px;letter-spacing:.5px}
  .phero .psub{font-size:18px;color:#B9CCE8;max-width:660px;line-height:1.8}
  .phero .psub b{color:#fff}
  .phero .pactions{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}
  .phero .ptags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
  .phero .ptags span{font-size:13.5px;color:#DCE8FB;background:rgba(255,255,255,.09);
    border:1px solid rgba(255,255,255,.16);padding:6px 14px;border-radius:8px}

  /* Scenario cards */
  .scn-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
  .scn{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:28px 26px;
    box-shadow:var(--shadow);transition:all .3s}
  .scn:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:#CBDCF5}
  .scn .ic{width:50px;height:50px;border-radius:13px;display:grid;place-items:center;background:var(--accent-soft);
    color:var(--accent);margin-bottom:16px}
  .scn h3{font-size:18px;font-weight:700;color:var(--primary);margin-bottom:10px}
  .scn p{color:var(--muted);font-size:14.5px;line-height:1.7}

  /* Core features two-column */
  .feat2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
  .feat{display:flex;gap:16px;align-items:flex-start;background:#fff;border:1px solid var(--border);
    border-radius:12px;padding:22px 22px;box-shadow:var(--shadow);transition:all .3s}
  .feat:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#CBDCF5}
  .feat .ic{width:44px;height:44px;flex:none;border-radius:11px;display:grid;place-items:center;
    background:var(--accent-soft);color:var(--accent)}
  .feat h3{font-size:17px;font-weight:700;color:var(--primary);margin-bottom:6px}
  .feat p{color:var(--muted);font-size:14px;line-height:1.7}

  /* AI deep band */
  .aideep{background:linear-gradient(135deg,var(--primary),var(--primary-2));border-radius:20px;
    padding:48px 42px;color:#fff;position:relative;overflow:hidden;box-shadow:var(--shadow-lg)}
  .aideep::before{content:"";position:absolute;top:-90px;right:-60px;width:340px;height:340px;border-radius:50%;
    background:radial-gradient(circle,rgba(46,124,246,.35),transparent 70%)}
  .aideep .ahead{position:relative;z-index:2;text-align:center;max-width:700px;margin:0 auto 36px}
  .aideep .ahead .tag{display:inline-flex;align-items:center;gap:7px;background:rgba(255,255,255,.14);
    border:1px solid rgba(255,255,255,.25);color:#CFE0FF;font-size:12.5px;padding:5px 14px;border-radius:999px;margin-bottom:14px}
  .aideep .ahead h2{font-size:30px;font-weight:800;margin-bottom:10px}
  .aideep .ahead p{color:#C6D6EE;font-size:15.5px;line-height:1.8}
  .aideep .ai-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;position:relative;z-index:2}
  .aideep .ai-item{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);border-radius:13px;
    padding:22px 20px;transition:all .3s}
  .aideep .ai-item:hover{background:rgba(255,255,255,.14);transform:translateY(-4px)}
  .aideep .ai-item .n{width:30px;height:30px;border-radius:9px;background:var(--accent);color:#fff;
    display:grid;place-items:center;font-weight:800;font-size:14px;margin-bottom:14px}
  .aideep .ai-item h3{font-size:16.5px;font-weight:700;margin-bottom:8px;color:#fff}
  .aideep .ai-item p{font-size:13.8px;color:#DCE8FB;line-height:1.7}
  .aideep .ai-item .fast{display:inline-block;margin-top:12px;font-size:12.5px;font-weight:700;color:#FFD89B}

  /* Grow band (会成长的系统) */
  .grow{background:var(--bg-soft)}
  .grow-card{background:#fff;border:1px solid var(--border);border-radius:18px;padding:46px 42px;
    box-shadow:var(--shadow);text-align:center;max-width:900px;margin:0 auto}
  .grow-card .gtag{display:inline-block;font-size:13px;font-weight:700;letter-spacing:1px;color:var(--accent);
    background:var(--accent-soft);padding:6px 16px;border-radius:999px;margin-bottom:18px}
  .grow-card h2{font-size:28px;font-weight:800;color:var(--primary);margin-bottom:16px}
  .grow-card p{color:var(--muted);font-size:16px;line-height:1.9;max-width:700px;margin:0 auto}
  .grow-card .pills{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:26px}
  .grow-card .pills span{background:var(--bg-tint);color:var(--primary);font-size:14px;font-weight:600;
    padding:9px 18px;border-radius:999px;border:1px solid var(--border)}

  /* Peipao mini band on product pages */
  .pp-mini{background:linear-gradient(135deg,#071E3D,var(--primary) 55%,var(--primary-2));color:#fff;overflow:hidden;position:relative}
  .pp-mini::before{content:"";position:absolute;bottom:-140px;right:-80px;width:460px;height:460px;border-radius:50%;
    background:radial-gradient(circle,rgba(46,124,246,.22),transparent 70%)}
  .pp-mini .wrap{position:relative;z-index:2}
  .pp-mini .sec-head h2{color:#fff}.pp-mini .sec-head p{color:#B9CCE8}
  .pp-mini .eyebrow{background:rgba(255,255,255,.12);color:#8FB6F5}
  .pp-mini .bar{background:linear-gradient(90deg,var(--gold),var(--accent))}
  .pp-mini .pp-quote{color:#fff;border-top-color:rgba(255,255,255,.14)}
  .pp-mini .pp-quote b{color:var(--gold)}

  /* Trial (reserved) band */
  .trial{background:linear-gradient(135deg,#071E3D,var(--primary) 50%,var(--primary-2));color:#fff;overflow:hidden;position:relative}
  .trial::before{content:"";position:absolute;top:-100px;left:-60px;width:420px;height:420px;border-radius:50%;
    background:radial-gradient(circle,rgba(46,124,246,.25),transparent 70%)}
  .trial .wrap{position:relative;z-index:2;display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
  .trial .tl h2{font-size:32px;font-weight:800;line-height:1.3;margin-bottom:14px}
  .trial .tl p{color:#B9CCE8;font-size:16px;line-height:1.85;margin-bottom:22px}
  .trial .tl .reserved{display:inline-flex;align-items:center;gap:8px;background:rgba(242,169,59,.16);
    border:1px solid rgba(242,169,59,.5);color:#FFD89B;font-size:13px;font-weight:600;padding:7px 15px;border-radius:999px;margin-bottom:22px}
  .trial .tl .pactions{display:flex;gap:14px;flex-wrap:wrap}
  .trial .tcard{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);border-radius:18px;
    padding:30px 30px;backdrop-filter:blur(4px)}
  .trial .tcard .th{font-size:16px;font-weight:700;margin-bottom:18px;color:#fff;display:flex;align-items:center;gap:10px}
  .trial .tcard ul{display:flex;flex-direction:column;gap:14px}
  .trial .tcard li{display:flex;gap:12px;align-items:flex-start;font-size:14.5px;color:#E4EDFB;line-height:1.6}
  .trial .tcard li .ck{width:22px;height:22px;flex:none;border-radius:50%;background:rgba(46,124,246,.35);
    display:grid;place-items:center;color:#fff;font-size:13px;font-weight:700;margin-top:1px}
  .trial .btn-try{background:var(--gold);color:#3a2400;box-shadow:0 8px 20px rgba(242,169,59,.4)}
  .trial .btn-try:hover{background:#FFC05C;transform:translateY(-2px)}

  /* 试用链接预留态（未配置真实地址时的按钮外观） */
  .btn-try.is-reserved{position:relative;opacity:.92}
  .btn-try.is-reserved::after{content:"即将开放";margin-left:8px;font-size:11.5px;font-weight:700;
    background:rgba(58,36,0,.16);padding:2px 8px;border-radius:999px;letter-spacing:.3px}
  .btn-try.is-reserved:hover{opacity:1}
  .phero .btn-try.is-reserved{box-shadow:0 8px 20px rgba(242,169,59,.3)}

  /* 轻提示 toast */
  .lx-toast{position:fixed;left:50%;bottom:40px;transform:translate(-50%,16px);z-index:9999;
    background:rgba(7,30,61,.95);color:#fff;font-size:14.5px;font-weight:600;padding:13px 24px;
    border-radius:999px;box-shadow:0 12px 34px rgba(7,30,61,.4);opacity:0;pointer-events:none;
    transition:opacity .28s,transform .28s;max-width:88vw;text-align:center}
  .lx-toast.show{opacity:1;transform:translate(-50%,0)}

  /* Related products */
  .relate-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
  .rel{display:block;background:#fff;border:1px solid var(--border);border-radius:12px;padding:22px 20px;
    box-shadow:var(--shadow);transition:all .3s}
  .rel:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:var(--accent)}
  .rel .ric{width:42px;height:42px;border-radius:11px;display:grid;place-items:center;background:var(--accent-soft);
    color:var(--accent);margin-bottom:14px}
  .rel h4{font-size:15.5px;font-weight:700;color:var(--primary);margin-bottom:6px}
  .rel p{font-size:13px;color:var(--muted);line-height:1.6}
  .rel .more{margin-top:12px;font-size:13px;font-weight:600;color:var(--accent)}

  /* Product CTA (reuse contact look, centered) */
  .pcta{background:linear-gradient(135deg,#071E3D,var(--primary) 50%,var(--primary-2));color:#fff;overflow:hidden;position:relative;text-align:center}
  .pcta::before{content:"";position:absolute;top:-100px;left:-60px;width:420px;height:420px;border-radius:50%;
    background:radial-gradient(circle,rgba(46,124,246,.25),transparent 70%)}
  .pcta .wrap{position:relative;z-index:2;max-width:720px}
  .pcta h2{font-size:32px;font-weight:800;line-height:1.3;margin-bottom:14px}
  .pcta p{color:#B9CCE8;font-size:16px;line-height:1.8;margin-bottom:28px}
  .pcta .pactions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

  /* ============ PRODUCT PAGES RESPONSIVE ============ */
  @media(max-width:1024px){
    .scn-grid,.aideep .ai-grid{grid-template-columns:repeat(2,1fr)}
    .feat2{grid-template-columns:1fr}
    .trial .wrap{grid-template-columns:1fr;gap:32px}
    .relate-grid{grid-template-columns:repeat(2,1fr)}
  }
  @media(max-width:768px){
    .phero h1{font-size:31px}
    .phero .psub{font-size:16px}
    .nav-item-dd{position:static}
    .nav-item-dd .dd-menu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;
      border:none;background:transparent;padding:0 0 4px 12px}
    .nav-item-dd .caret{display:none}
    .scn-grid,.aideep .ai-grid{grid-template-columns:1fr}
    .relate-grid{grid-template-columns:1fr}
    .aideep{padding:34px 22px}
    .grow-card,.trial .tcard{padding:30px 22px}
    .trial .tl h2,.pcta h2{font-size:26px}
  }