:root{
    --ink:#14142c;
    --ink2:#2f2f52;
    --muted:#5a5a80;
    --bg:#f6f6fc;
    --line:rgba(88,70,168,.14);
    --violet:#7a5cff;
    --blue:#2f7cf6;
    --cyan:#12c2b8;
    --pink:#ff5fa2;
    --r:18px;
    --maxw:1180px;
    --sh1:0 2px 10px rgba(40,30,110,.06);
    --sh2:0 18px 40px rgba(50,35,130,.12);
  }
  *{box-sizing:border-box;}
  html{
    scroll-behavior:smooth;
    scroll-padding-top:88px;
    background:#f6f6fc;
  }
  body{
    margin:0;
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
    color:var(--ink);
    background:#f6f6fc;
    font-size:16px;
    line-height:1.7;
    -webkit-font-smoothing:antialiased;
  }
  body::before{
    content:"";
    position:fixed;
    inset:0;
    z-index:0;
    pointer-events:none;
    background:
      radial-gradient(880px 520px at 10% -6%, rgba(122,92,255,.20), transparent 62%),
      radial-gradient(760px 460px at 92% 4%, rgba(18,194,184,.16), transparent 64%),
      radial-gradient(720px 520px at 50% 104%, rgba(255,95,162,.13), transparent 66%);
  }
  .page{position:relative;z-index:1;}
  img{max-width:100%;}
  a{color:inherit;text-decoration:none;}
  h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;color:var(--ink);}
  p{margin:0;}
  ul,ol{margin:0;padding:0;list-style:none;}
  .container{
    width:100%;
    max-width:var(--maxw);
    margin:0 auto;
    padding:0 20px;
  }
  .section{padding:72px 0;}
  .section-tint{background:rgba(255,255,255,.5);border-top:1px solid rgba(88,70,168,.08);border-bottom:1px solid rgba(88,70,168,.08);}
  .eyebrow{
    display:inline-block;
    font-size:12.5px;
    letter-spacing:.14em;
    font-weight:600;
    color:#5f4bd6;
    padding:6px 14px;
    border-radius:999px;
    background:rgba(122,92,255,.10);
    border:1px solid rgba(122,92,255,.20);
  }
  .section-head{
    max-width:760px;
    margin:0 auto 42px;
    text-align:center;
  }
  .section-head h2{
    font-size:clamp(23px,3vw,33px);
    line-height:1.32;
    margin:16px 0 12px;
  }
  .section-head p{
    color:var(--muted);
    font-size:15.5px;
    line-height:1.85;
  }
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    padding:13px 28px;
    border-radius:999px;
    font-size:15px;
    font-weight:600;
    border:1px solid transparent;
    cursor:pointer;
    transition:transform .25s ease, box-shadow .25s ease, background .25s ease, color .25s ease;
    white-space:nowrap;
  }
  .btn-primary{
    background:linear-gradient(120deg,#6f52f5,#2f7cf6 48%,#0fbfb4);
    color:#ffffff;
    box-shadow:0 12px 26px rgba(80,70,220,.26);
  }
  .btn-primary:hover{transform:translateY(-3px);box-shadow:0 18px 34px rgba(80,70,220,.34);}
  .btn-primary:active{transform:translateY(-1px);}
  .btn-outline{
    background:rgba(255,255,255,.9);
    color:var(--ink);
    border-color:rgba(122,92,255,.32);
    box-shadow:var(--sh1);
  }
  .btn-outline:hover{transform:translateY(-3px);border-color:rgba(122,92,255,.65);box-shadow:0 14px 28px rgba(90,70,190,.14);}
  .btn-ghost{
    background:rgba(122,92,255,.10);
    color:#4a37c9;
    border-color:rgba(122,92,255,.22);
    padding:10px 20px;
    font-size:14px;
  }
  .btn-ghost:hover{background:rgba(122,92,255,.18);transform:translateY(-2px);}
  .btn-block{width:100%;}

  /* ---------- header ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    background:rgba(246,246,252,.86);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    border-bottom:1px solid rgba(88,70,168,.10);
  }
  .header-inner{
    position:relative;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    min-height:68px;
  }
  .brand{
    display:flex;
    align-items:center;
    gap:10px;
    flex:0 0 auto;
    min-width:0;
  }
  .brand-mark{
    display:flex;
    align-items:center;
    justify-content:center;
    max-width:132px;
    overflow:hidden;
  }
  .ai-page-logo{
    display:block;
    max-height:38px;
    width:auto;
    max-width:100%;
  }
  .brand-name{
    font-weight:800;
    font-size:17px;
    letter-spacing:.02em;
    color:var(--ink);
    white-space:nowrap;
  }
  .site-nav{margin-left:auto;}
  .nav-links{
    display:flex;
    align-items:center;
    gap:0;
    flex-wrap:nowrap;
  }
  .nav-links a{
    display:block;
    padding:10px 11px;
    font-size:14px;
    font-weight:500;
    color:var(--ink2);
    border-radius:10px;
    transition:color .2s ease, background .2s ease;
    white-space:nowrap;
  }
  .nav-links a:hover{color:#5b45e0;background:rgba(122,92,255,.10);}
  .header-actions{
    display:flex;
    align-items:center;
    gap:10px;
    flex:0 0 auto;
  }
  .nav-toggle{
    display:none;
    flex-direction:column;
    justify-content:center;
    gap:5px;
    width:42px;
    height:42px;
    border-radius:12px;
    border:1px solid rgba(122,92,255,.24);
    background:rgba(255,255,255,.9);
    cursor:pointer;
    padding:0 11px;
  }
  .nav-toggle span{
    display:block;
    height:2px;
    border-radius:2px;
    background:#4a37c9;
    transition:transform .3s ease, opacity .3s ease;
  }
  .nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  .nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
  .nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

  /* ---------- hero ---------- */
  .hero{
    position:relative;
    padding:78px 0 66px;
    text-align:center;
    overflow:hidden;
  }
  .hero::after{
    content:"";
    position:absolute;
    left:50%;
    top:-160px;
    width:820px;
    height:520px;
    transform:translateX(-50%);
    background:radial-gradient(closest-side, rgba(122,92,255,.22), rgba(47,124,246,.10) 55%, transparent 78%);
    filter:blur(10px);
    pointer-events:none;
    z-index:-1;
  }
  .hero h1{
    font-size:clamp(28px,4.6vw,50px);
    line-height:1.24;
    margin:20px auto 18px;
    max-width:920px;
    letter-spacing:-.02em;
  }
  .hero-lead{
    max-width:730px;
    margin:0 auto;
    color:var(--muted);
    font-size:clamp(14.5px,1.6vw,16.5px);
    line-height:1.9;
  }
  .hero-actions{
    display:flex;
    flex-wrap:wrap;
    justify-content:center;
    gap:14px;
    margin-top:32px;
  }
  .hero-stats{
    margin:46px 0 0;
    padding:16px 8px;
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:8px;
    background:rgba(255,255,255,.72);
    border:1px solid var(--line);
    border-radius:22px;
    box-shadow:var(--sh1);
    backdrop-filter:blur(10px);
  }
  .hero-stats li{
    position:relative;
    padding:8px 6px;
    text-align:center;
  }
  .hero-stats li + li::before{
    content:"";
    position:absolute;
    left:0;
    top:18%;
    width:1px;
    height:64%;
    background:linear-gradient(180deg,transparent,rgba(122,92,255,.35),transparent);
  }
  .hero-stats strong{
    display:block;
    font-size:clamp(19px,2.4vw,27px);
    font-weight:800;
    letter-spacing:-.02em;
    color:var(--ink);
  }
  .hero-stats span{
    display:block;
    margin-top:4px;
    font-size:12.5px;
    color:var(--muted);
  }
  .model-cloud{
    display:flex;
    flex-wrap:wrap;
    justify-content:center;
    gap:9px;
    margin-top:34px;
  }
  .model-cloud span{
    padding:7px 13px;
    font-size:13px;
    color:#41416b;
    border-radius:999px;
    background:rgba(255,255,255,.8);
    border:1px solid rgba(88,70,168,.16);
    box-shadow:0 1px 4px rgba(40,30,110,.05);
    transition:transform .25s ease, border-color .25s ease, color .25s ease;
  }
  .model-cloud span:hover{transform:translateY(-3px);border-color:rgba(122,92,255,.45);color:#5b45e0;}

  /* ---------- cards ---------- */
  .card{
    background:rgba(255,255,255,.84);
    border:1px solid var(--line);
    border-radius:var(--r);
    padding:24px;
    box-shadow:var(--sh1);
    transition:transform .3s ease, box-shadow .3s ease, border-color .3s ease;
  }
  .card:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:rgba(122,92,255,.34);}
  .card h3{font-size:17px;margin-bottom:8px;}
  .card p{font-size:14px;color:var(--muted);line-height:1.75;}

  /* ---------- about ---------- */
  .about-grid{
    display:grid;
    grid-template-columns:1.08fr .92fr;
    gap:44px;
    align-items:start;
  }
  .about-text p{
    color:var(--muted);
    font-size:15px;
    line-height:1.9;
    margin-bottom:14px;
  }
  .about-features{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:10px 16px;
    margin-top:22px;
  }
  .about-features li{
    display:flex;
    align-items:flex-start;
    gap:9px;
    font-size:14px;
    color:var(--ink2);
    line-height:1.6;
  }
  .dot{
    flex:0 0 auto;
    width:18px;
    height:18px;
    margin-top:3px;
    border-radius:50%;
    background:linear-gradient(135deg,#7a5cff,#12c2b8);
    position:relative;
  }
  .dot::after{
    content:"";
    position:absolute;
    left:5px;
    top:5px;
    width:8px;
    height:5px;
    border-left:2px solid #fff;
    border-bottom:2px solid #fff;
    transform:rotate(-45deg);
  }
  .about-media{
    border-radius:22px;
    overflow:hidden;
    border:1px solid var(--line);
    background:#fff;
    box-shadow:var(--sh2);
    padding:8px;
  }
  .about-media img{border-radius:16px;display:block;width:100%;}
  .ai-page-image{display:block;width:100%;border-radius:16px;}

  /* ---------- services ---------- */
  .service-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:20px;
  }
  .service-card{
    position:relative;
    overflow:hidden;
    padding-top:26px;
  }
  .service-card::before{
    content:"";
    position:absolute;
    left:0;
    right:0;
    top:0;
    height:3px;
    background:linear-gradient(90deg,#7a5cff,#2f7cf6,#12c2b8,#ff5fa2);
    opacity:.85;
  }
  .svc-mark{
    display:block;
    width:40px;
    height:40px;
    border-radius:12px;
    margin-bottom:14px;
    background:linear-gradient(135deg,#7a5cff,#2f7cf6);
    box-shadow:0 8px 18px rgba(122,92,255,.24);
  }
  .svc-mark::after{
    content:"";
    display:block;
    width:14px;
    height:14px;
    margin:13px 0 0 13px;
    border-radius:4px;
    background:rgba(255,255,255,.9);
  }
  .service-card:nth-child(3n+2) .svc-mark{background:linear-gradient(135deg,#12c2b8,#2f7cf6);box-shadow:0 8px 18px rgba(18,194,184,.24);}
  .service-card:nth-child(3n+3) .svc-mark{background:linear-gradient(135deg,#ff5fa2,#7a5cff);box-shadow:0 8px 18px rgba(255,95,162,.22);}
  .tag-cloud{
    display:flex;
    flex-wrap:wrap;
    justify-content:center;
    gap:10px;
    margin-top:30px;
  }
  .tag-cloud span{
    padding:8px 15px;
    font-size:13.5px;
    color:var(--ink2);
    border-radius:999px;
    background:#fff;
    border:1px solid var(--line);
    box-shadow:var(--sh1);
    transition:transform .25s ease, color .25s ease, border-color .25s ease;
  }
  .tag-cloud span:hover{transform:translateY(-2px);color:#5b45e0;border-color:rgba(122,92,255,.45);}

  /* ---------- steps ---------- */
  .steps{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:18px;
  }
  .steps li{
    position:relative;
    background:rgba(255,255,255,.84);
    border:1px solid var(--line);
    border-radius:var(--r);
    padding:24px 20px;
    box-shadow:var(--sh1);
    transition:transform .3s ease, box-shadow .3s ease, border-color .3s ease;
  }
  .steps li:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:rgba(122,92,255,.34);}
  .step-no{
    display:inline-block;
    font-size:12.5px;
    font-weight:700;
    letter-spacing:.12em;
    color:#5b45e0;
    padding:4px 11px;
    border-radius:999px;
    background:rgba(122,92,255,.11);
    margin-bottom:14px;
  }
  .steps h3{font-size:16px;margin-bottom:8px;}
  .steps p{font-size:13.5px;color:var(--muted);line-height:1.75;}

  /* ---------- solutions ---------- */
  .solution-grid{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:18px;
  }
  .solution-card h3{font-size:16.5px;}
  .solution-card .chips{
    display:flex;
    flex-wrap:wrap;
    gap:7px;
    margin-top:14px;
  }
  .solution-card .chips span{
    font-size:12px;
    padding:4px 10px;
    border-radius:999px;
    color:#4a37c9;
    background:rgba(122,92,255,.09);
    border:1px solid rgba(122,92,255,.16);
  }

  /* ---------- network ---------- */
  .network-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:18px;
  }
  .network-card{
    background:rgba(255,255,255,.84);
    border:1px solid var(--line);
    border-radius:var(--r);
    padding:26px 24px;
    box-shadow:var(--sh1);
    transition:transform .3s ease, box-shadow .3s ease;
  }
  .network-card:hover{transform:translateY(-4px);box-shadow:var(--sh2);}
  .network-card h3{font-size:16.5px;margin-bottom:10px;}
  .network-card p{font-size:14px;color:var(--muted);line-height:1.8;}

  /* ---------- timeline ---------- */
  .timeline{
    position:relative;
    max-width:760px;
    margin:0 auto;
    padding-left:6px;
  }
  .timeline::before{
    content:"";
    position:absolute;
    left:19px;
    top:10px;
    bottom:10px;
    width:2px;
    border-radius:2px;
    background:linear-gradient(180deg,#7a5cff,#2f7cf6,#12c2b8,#ff5fa2);
    opacity:.42;
  }
  .timeline li{
    position:relative;
    padding:0 0 26px 56px;
  }
  .timeline li:last-child{padding-bottom:0;}
  .timeline li::before{
    content:"";
    position:absolute;
    left:12px;
    top:6px;
    width:16px;
    height:16px;
    border-radius:50%;
    background:#fff;
    border:3px solid var(--violet);
    box-shadow:0 0 0 4px rgba(122,92,255,.10);
  }
  .timeline h3{font-size:16.5px;margin-bottom:6px;}
  .timeline p{font-size:14px;color:var(--muted);line-height:1.8;}

  /* ---------- cases ---------- */
  .case-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:20px;
    align-items:start;
  }
  .case-card{
    padding:12px 12px 20px;
  }
  .case-media{
    border-radius:14px;
    overflow:hidden;
    background:#f1f0fb;
    border:1px solid rgba(88,70,168,.10);
  }
  .case-media img{display:block;width:100%;border-radius:14px;}
  .case-body{padding:16px 8px 0;}
  .case-body h3{font-size:16.5px;margin-bottom:6px;}
  .case-body p{font-size:13.5px;color:var(--muted);line-height:1.75;}
  .strip-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:16px;
    margin-top:22px;
  }
  .strip-grid figure{
    margin:0;
    border-radius:14px;
    overflow:hidden;
    border:1px solid var(--line);
    background:#fff;
    box-shadow:var(--sh1);
    transition:transform .3s ease, box-shadow .3s ease;
  }
  .strip-grid figure:hover{transform:translateY(-4px);box-shadow:var(--sh2);}
  .strip-grid img{display:block;width:100%;border-radius:14px;}

  /* ---------- review ---------- */
  .review-card{
    background:rgba(255,255,255,.86);
    border:1px solid var(--line);
    border-radius:24px;
    padding:32px 28px;
    box-shadow:var(--sh2);
  }
  .review-head{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    justify-content:space-between;
    gap:24px;
    padding-bottom:24px;
    margin-bottom:24px;
    border-bottom:1px solid rgba(88,70,168,.12);
  }
  .score-block{display:flex;align-items:center;gap:20px;}
  .score-num{
    font-size:46px;
    font-weight:800;
    line-height:1;
    letter-spacing:-.03em;
    color:var(--ink);
  }
  .score-num span{font-size:17px;font-weight:600;color:var(--muted);margin-left:4px;letter-spacing:0;}
  .score-meta strong{display:block;font-size:15px;color:var(--ink);}
  .score-meta small{display:block;font-size:13px;color:var(--muted);margin-top:2px;}
  .stars{
    color:#f0a400;
    font-size:19px;
    letter-spacing:4px;
    line-height:1.2;
  }
  .review-badge{
    display:inline-block;
    font-size:13px;
    font-weight:600;
    color:#0b7a72;
    background:rgba(18,194,184,.12);
    border:1px solid rgba(18,194,184,.30);
    padding:7px 16px;
    border-radius:999px;
  }
  .table-wrap{
    overflow-x:auto;
    border-radius:16px;
    border:1px solid var(--line);
    background:#fff;
    -webkit-overflow-scrolling:touch;
  }
  .compare-table{
    width:100%;
    min-width:740px;
    border-collapse:collapse;
    font-size:14.5px;
  }
  .compare-table thead th{
    padding:14px 16px;
    text-align:left;
    font-weight:700;
    color:var(--ink);
    background:linear-gradient(120deg,rgba(122,92,255,.12),rgba(18,194,184,.12));
    border-bottom:1px solid var(--line);
    white-space:nowrap;
  }
  .compare-table tbody td{
    padding:14px 16px;
    border-bottom:1px solid rgba(88,70,168,.08);
    color:var(--ink2);
    vertical-align:top;
  }
  .compare-table tbody tr:last-child td{border-bottom:0;}
  .compare-table tbody tr:hover{background:rgba(122,92,255,.05);}
  .compare-table .hl{color:#5b45e0;font-weight:600;}

  /* ---------- token ---------- */
  .token-grid{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:18px;
  }
  .token-card{
    background:rgba(255,255,255,.86);
    border:1px solid var(--line);
    border-radius:var(--r);
    padding:24px 20px;
    box-shadow:var(--sh1);
    transition:transform .3s ease, box-shadow .3s ease, border-color .3s ease;
  }
  .token-card:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:rgba(122,92,255,.34);}
  .token-card h3{font-size:16px;margin-bottom:8px;}
  .token-card p{font-size:13.5px;color:var(--muted);line-height:1.75;}
  .token-note{
    margin-top:22px;
    font-size:13px;
    color:var(--muted);
    text-align:center;
    line-height:1.8;
  }

  /* ---------- testimonials ---------- */
  .quote-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:20px;
  }
  .quote-card{
    display:flex;
    flex-direction:column;
    justify-content:space-between;
    gap:18px;
    min-height:100%;
  }
  .quote-text{
    font-size:14.5px;
    color:var(--ink2);
    line-height:1.85;
  }
  .quote-user{
    display:flex;
    align-items:center;
    gap:12px;
  }
  .avatar{
    flex:0 0 auto;
    width:40px;
    height:40px;
    border-radius:50%;
    display:flex;
    align-items:center;
    justify-content:center;
    font-weight:700;
    font-size:15px;
    color:#fff;
    background:linear-gradient(135deg,#7a5cff,#2f7cf6);
    box-shadow:0 6px 14px rgba(90,70,190,.24);
  }
  .quote-card:nth-child(3n+2) .avatar{background:linear-gradient(135deg,#12c2b8,#2f7cf6);box-shadow:0 6px 14px rgba(18,194,184,.22);}
  .quote-card:nth-child(3n+3) .avatar{background:linear-gradient(135deg,#ff5fa2,#7a5cff);box-shadow:0 6px 14px rgba(255,95,162,.22);}
  .quote-user strong{display:block;font-size:14.5px;color:var(--ink);}
  .quote-user small{display:block;font-size:12.5px;color:var(--muted);}

  /* ---------- partner ---------- */
  .partner-card{
    position:relative;
    overflow:hidden;
    border-radius:26px;
    padding:44px 36px;
    background:linear-gradient(125deg,rgba(122,92,255,.14),rgba(47,124,246,.10) 46%,rgba(18,194,184,.14));
    border:1px solid rgba(122,92,255,.22);
    box-shadow:var(--sh2);
    display:grid;
    grid-template-columns:1.35fr .65fr;
    gap:32px;
    align-items:center;
  }
  .partner-card h2{font-size:clamp(22px,2.8vw,30px);line-height:1.35;margin-bottom:14px;}
  .partner-card p{font-size:14.5px;color:var(--ink2);line-height:1.9;}
  .partner-actions{display:flex;flex-direction:column;gap:12px;align-items:stretch;}
  .partner-list{
    display:flex;
    flex-wrap:wrap;
    gap:8px;
    margin-top:16px;
  }
  .partner-list span{
    font-size:12.5px;
    padding:5px 12px;
    border-radius:999px;
    color:#0b7a72;
    background:rgba(255,255,255,.75);
    border:1px solid rgba(18,194,184,.28);
  }

  /* ---------- help ---------- */
  .help-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:20px;
    align-items:start;
  }
  .help-card h3{font-size:16.5px;margin-bottom:14px;}
  .help-list li{
    padding:9px 0;
    border-bottom:1px dashed rgba(88,70,168,.16);
    font-size:14px;
  }
  .help-list li:last-child{border-bottom:0;padding-bottom:0;}
  .help-list a{color:var(--ink2);transition:color .2s ease;}
  .help-list a:hover{color:#5b45e0;}
  .wiki-tags{
    display:flex;
    flex-wrap:wrap;
    gap:8px;
  }
  .wiki-tags span{
    font-size:12.5px;
    padding:6px 12px;
    border-radius:8px;
    color:#41416b;
    background:rgba(122,92,255,.08);
    border:1px solid rgba(122,92,255,.14);
  }
  .article-list li{
    padding:9px 0;
    border-bottom:1px dashed rgba(88,70,168,.16);
    font-size:14px;
  }
  .article-list li:last-child{border-bottom:0;padding-bottom:0;}
  .article-list a{color:var(--ink2);transition:color .2s ease;}
  .article-list a:hover{color:#5b45e0;}

  /* ---------- faq ---------- */
  .faq-list{
    max-width:900px;
    margin:0 auto;
    display:grid;
    gap:12px;
  }
  .faq-item{
    background:rgba(255,255,255,.86);
    border:1px solid var(--line);
    border-radius:14px;
    box-shadow:var(--sh1);
    overflow:hidden;
    transition:border-color .25s ease, box-shadow .25s ease;
  }
  .faq-item[open]{
    border-color:rgba(122,92,255,.36);
    box-shadow:0 14px 30px rgba(50,35,130,.10);
  }
  .faq-item summary{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    padding:18px 22px;
    font-size:15px;
    font-weight:600;
    color:var(--ink);
    cursor:pointer;
    list-style:none;
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary::after{
    content:"";
    flex:0 0 auto;
    width:9px;
    height:9px;
    border-right:2px solid #5b45e0;
    border-bottom:2px solid #5b45e0;
    transform:rotate(45deg);
    transition:transform .3s ease;
  }
  .faq-item[open] summary::after{transform:rotate(-135deg);}
  .faq-body{
    padding:0 22px 18px;
  }
  .faq-body p{
    font-size:14px;
    color:var(--muted);
    line-height:1.85;
  }

  /* ---------- contact ---------- */
  .contact-grid{
    display:grid;
    grid-template-columns:0.9fr 1.1fr;
    gap:32px;
    align-items:start;
  }
  .contact-info{
    background:rgba(255,255,255,.86);
    border:1px solid var(--line);
    border-radius:22px;
    padding:28px 26px;
    box-shadow:var(--sh1);
  }
  .contact-info h3{font-size:17px;margin-bottom:16px;}
  .contact-list li{
    display:flex;
    justify-content:space-between;
    gap:14px;
    padding:11px 0;
    border-bottom:1px dashed rgba(88,70,168,.16);
    font-size:14px;
  }
  .contact-list li:last-child{border-bottom:0;}
  .contact-list .k{color:var(--muted);flex:0 0 auto;}
  .contact-list .v{color:var(--ink);font-weight:600;text-align:right;word-break:break-all;}
  .contact-list a.v:hover{color:#5b45e0;}
  .kefu-qr{
    margin-top:20px;
    text-align:center;
    padding-top:20px;
    border-top:1px dashed rgba(88,70,168,.16);
  }
  .kefu-qr img{
    width:150px;
    max-width:100%;
    height:auto;
    border-radius:14px;
    border:1px solid var(--line);
    background:#fff;
    padding:6px;
    display:block;
    margin:0 auto 10px;
  }
  .kefu-qr p{font-size:13px;color:var(--muted);}

  .contact-form{
    background:rgba(255,255,255,.9);
    border:1px solid var(--line);
    border-radius:22px;
    padding:28px 26px;
    box-shadow:var(--sh2);
  }
  .form-row{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:16px;
  }
  .field{margin-bottom:16px;}
  .field label{
    display:block;
    font-size:13.5px;
    font-weight:600;
    color:var(--ink2);
    margin-bottom:7px;
  }
  .field label em{color:#e0426f;font-style:normal;margin-left:2px;}
  .field input,
  .field select,
  .field textarea{
    width:100%;
    padding:12px 14px;
    font-size:14.5px;
    font-family:inherit;
    color:var(--ink);
    background:#fff;
    border:1px solid rgba(88,70,168,.20);
    border-radius:12px;
    outline:none;
    transition:border-color .2s ease, box-shadow .2s ease;
  }
  .field textarea{resize:vertical;min-height:104px;line-height:1.7;}
  .field input::placeholder,
  .field textarea::placeholder{color:#9a9ab5;}
  .field input:focus,
  .field select:focus,
  .field textarea:focus{
    border-color:rgba(122,92,255,.62);
    box-shadow:0 0 0 4px rgba(122,92,255,.12);
  }
  .form-note{
    margin-top:12px;
    font-size:12.5px;
    color:var(--muted);
    line-height:1.7;
    text-align:center;
  }

  /* ---------- footer ---------- */
  .site-footer{
    background:#f0effa;
    border-top:1px solid rgba(88,70,168,.14);
    color:#2f2f52;
    padding:52px 0 24px;
    margin-top:8px;
  }
  .footer-top{
    display:grid;
    grid-template-columns:1.6fr 1fr 1fr 1fr;
    gap:34px;
    padding-bottom:34px;
    border-bottom:1px solid rgba(88,70,168,.14);
  }
  .footer-brand .brand-name{display:block;margin-top:10px;}
  .footer-brand p{
    margin-top:12px;
    font-size:13.5px;
    color:#55557a;
    line-height:1.85;
    max-width:360px;
  }
  .footer-col h3{
    font-size:14.5px;
    color:#22224a;
    margin-bottom:14px;
    font-weight:700;
  }
  .footer-col li{
    font-size:13.5px;
    color:#55557a;
    padding:5px 0;
    line-height:1.7;
    word-break:break-all;
  }
  .footer-col a{
    color:#4a4a75;
    transition:color .2s ease;
  }
  .footer-col a:hover{color:#5b45e0;}
  .footer-bottom{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    padding-top:20px;
    font-size:13px;
    color:#5b5b82;
  }
  .footer-bottom a{color:#4a37c9;font-weight:600;}
  .footer-bottom a:hover{text-decoration:underline;}

  /* ---------- floating ---------- */
  .float-tools{
    position:fixed;
    right:18px;
    bottom:22px;
    z-index:80;
    display:flex;
    flex-direction:column;
    align-items:flex-end;
    gap:10px;
  }
  .float-btn{
    width:54px;
    height:54px;
    border-radius:18px;
    border:1px solid rgba(122,92,255,.30);
    background:linear-gradient(135deg,#6f52f5,#2f7cf6);
    color:#fff;
    font-size:13px;
    font-weight:600;
    letter-spacing:.04em;
    cursor:pointer;
    box-shadow:0 12px 26px rgba(80,70,220,.30);
    transition:transform .25s ease, box-shadow .25s ease, opacity .25s ease;
    display:flex;
    align-items:center;
    justify-content:center;
  }
  .float-btn:hover{transform:translateY(-3px);box-shadow:0 18px 32px rgba(80,70,220,.38);}
  .back-top{
    background:#ffffff;
    color:#4a37c9;
    border:1px solid rgba(122,92,255,.30);
    box-shadow:0 10px 22px rgba(50,35,130,.16);
  }
  .back-top[hidden]{display:none;}
  .kefu-panel{
    width:246px;
    background:#ffffff;
    border:1px solid var(--line);
    border-radius:18px;
    box-shadow:0 24px 48px rgba(50,35,130,.20);
    padding:18px;
    text-align:center;
    opacity:0;
    transform:translateY(10px) scale(.96);
    pointer-events:none;
    transition:opacity .25s ease, transform .25s ease;
  }
  .kefu-panel.open{opacity:1;transform:none;pointer-events:auto;}
  .kefu-panel img{
    width:150px;
    max-width:100%;
    height:auto;
    border-radius:12px;
    border:1px solid var(--line);
    display:block;
    margin:0 auto 10px;
  }
  .kefu-panel .kefu-title{
    font-size:13.5px;
    color:var(--ink);
    font-weight:600;
    margin-bottom:10px;
  }
  .kefu-panel ul li{
    font-size:13px;
    color:var(--muted);
    padding:3px 0;
  }

  /* ---------- reveal ---------- */
  .js .reveal{
    opacity:0;
    transform:translateY(20px);
    transition:opacity .7s cubic-bezier(.22,.7,.3,1), transform .7s cubic-bezier(.22,.7,.3,1);
  }
  .js .reveal.is-visible{
    opacity:1;
    transform:none;
  }
  @media (prefers-reduced-motion: reduce){
    .js .reveal{opacity:1;transform:none;transition:none;}
    html{scroll-behavior:auto;}
  }

  /* ---------- responsive ---------- */
  @media (max-width:1080px){
    .nav-links a{padding:10px 8px;font-size:13.5px;}
    .brand-name{display:none;}
  }
  @media (max-width:980px){
    .site-nav{
      position:absolute;
      top:100%;
      left:0;
      right:0;
      background:rgba(255,255,255,.98);
      border-bottom:1px solid rgba(88,70,168,.14);
      border-radius:0 0 18px 18px;
      box-shadow:0 22px 40px rgba(50,35,130,.14);
      max-height:0;
      overflow:hidden;
      transition:max-height .35s ease;
    }
    .site-nav.open{max-height:560px;overflow-y:auto;}
    .nav-links{
      flex-direction:column;
      align-items:stretch;
      padding:8px 12px 16px;
    }
    .nav-links a{
      padding:12px 14px;
      font-size:14.5px;
      border-bottom:1px solid rgba(88,70,168,.08);
      border-radius:0;
    }
    .nav-links li:last-child a{border-bottom:0;}
    .header-actions .btn-ghost{display:none;}
    .nav-toggle{display:flex;}
    .brand-name{display:inline;}
    .about-grid{grid-template-columns:1fr;gap:28px;}
    .solution-grid{grid-template-columns:repeat(2,1fr);}
    .token-grid{grid-template-columns:repeat(2,1fr);}
    .quote-grid{grid-template-columns:repeat(2,1fr);}
    .service-grid{grid-template-columns:repeat(2,1fr);}
    .steps{grid-template-columns:repeat(2,1fr);}
    .case-grid{grid-template-columns:repeat(2,1fr);}
    .strip-grid{grid-template-columns:repeat(2,1fr);}
    .help-grid{grid-template-columns:1fr 1fr;}
    .contact-grid{grid-template-columns:1fr;}
    .footer-top{grid-template-columns:1fr 1fr;}
    .partner-card{grid-template-columns:1fr;padding:34px 26px;}
    .partner-actions{flex-direction:row;flex-wrap:wrap;}
    .partner-actions .btn{flex:1 1 auto;}
  }
  @media (max-width:720px){
    .section{padding:52px 0;}
    .hero{padding:56px 0 48px;}
    .hero-stats{grid-template-columns:repeat(2,1fr);gap:4px;padding:12px 6px;}
    .hero-stats li + li::before{display:none;}
    .hero-stats li:nth-child(odd)::after{
      content:"";
      position:absolute;
      right:0;
      top:18%;
      width:1px;
      height:64%;
      background:linear-gradient(180deg,transparent,rgba(122,92,255,.30),transparent);
    }
    .network-grid{grid-template-columns:1fr;}
    .quote-grid{grid-template-columns:1fr;}
    .solution-grid{grid-template-columns:1fr;}
    .token-grid{grid-template-columns:1fr;}
    .service-grid{grid-template-columns:1fr;}
    .steps{grid-template-columns:1fr;}
    .case-grid{grid-template-columns:1fr;}
    .strip-grid{grid-template-columns:1fr;}
    .help-grid{grid-template-columns:1fr;}
    .form-row{grid-template-columns:1fr;gap:0;}
    .footer-top{grid-template-columns:1fr;gap:26px;}
    .review-card{padding:24px 18px;}
    .score-num{font-size:38px;}
    .review-head{gap:16px;}
    .contact-info,.contact-form{padding:22px 18px;}
    .float-tools{right:14px;bottom:16px;}
    .float-btn{width:50px;height:50px;border-radius:16px;}
    .kefu-panel{width:224px;}
    .hero-actions .btn{flex:1 1 150px;}
  }
  @media (max-width:420px){
    .container{padding:0 16px;}
    .about-features{grid-template-columns:1fr;}
    .footer-bottom{flex-direction:column;align-items:flex-start;}
  }