:root{
    --purple:#7c3aed;
    --purple-deep:#5b21b6;
    --pink:#d946ef;
    --ink:#211b36;
    --ink-2:#4a4463;
    --ink-3:#6f6987;
    --line:rgba(124,58,237,.16);
    --card-bg:rgba(255,255,255,.84);
    --radius:18px;
    --shadow:0 10px 30px rgba(88,50,160,.10);
    --shadow-hover:0 18px 42px rgba(88,50,160,.19);
    --max:1180px;
  }
  *{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth;scroll-padding-top:88px;background:#f7f4ff}
  body{
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
    font-size:16px;line-height:1.75;color:var(--ink);
    background:transparent;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  .bg-decor{position:fixed;inset:0;z-index:-1;pointer-events:none;overflow:hidden;
    background:linear-gradient(180deg,#faf7ff 0%,#f3efff 36%,#eef3ff 70%,#f8f4ff 100%)}
  .bg-decor .orb{position:absolute;border-radius:50%;filter:blur(60px);opacity:.6}
  .orb-1{width:560px;height:560px;top:-180px;left:-150px;background:radial-gradient(circle,#c9b6ff,rgba(201,182,255,0) 70%);animation:orbFloat 22s ease-in-out infinite}
  .orb-2{width:640px;height:640px;top:-210px;right:-220px;background:radial-gradient(circle,#f5d0fe,rgba(245,208,254,0) 70%);animation:orbFloat 28s ease-in-out infinite reverse}
  .orb-3{width:520px;height:520px;bottom:4%;left:32%;background:radial-gradient(circle,#bfdcff,rgba(191,220,255,0) 70%);opacity:.35;animation:orbFloat 34s ease-in-out infinite}
  @keyframes orbFloat{0%,100%{transform:translate3d(0,0,0)}50%{transform:translate3d(36px,28px,0)}}

  .container{width:100%;max-width:var(--max);margin:0 auto;padding:0 20px}

  /* ---------- header ---------- */
  .site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.86);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
  .nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px}
  .brand{display:flex;align-items:center;flex-shrink:0;text-decoration:none}
  .ai-page-logo{display:block;max-width:130px;height:auto}
  .nav-links{display:flex;align-items:center;justify-content:flex-end;gap:0;flex-wrap:wrap;margin-left:auto}
  .nav-links a{display:block;padding:8px 10px;font-size:14px;color:var(--ink-2);text-decoration:none;border-radius:8px;white-space:nowrap;transition:color .22s ease,background .22s ease}
  .nav-links a:hover{color:var(--purple-deep);background:rgba(124,58,237,.09)}
  .nav-cta{flex-shrink:0;display:inline-flex;align-items:center;padding:9px 20px;border-radius:999px;font-size:14px;font-weight:600;color:#fff;text-decoration:none;background:linear-gradient(120deg,#7c3aed,#a855f7 55%,#d946ef);box-shadow:0 8px 20px rgba(124,58,237,.3);transition:transform .22s ease,box-shadow .22s ease}
  .nav-cta:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(124,58,237,.42)}
  .nav-toggle{display:none;width:42px;height:38px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:5px}
  .nav-toggle span{display:block;width:18px;height:2px;background:var(--purple-deep);border-radius:2px;transition:transform .25s ease,opacity .25s ease}
  .nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav-toggle.is-open span:nth-child(2){opacity:0}
  .nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

  /* ---------- buttons ---------- */
  .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 30px;border-radius:999px;font-size:15.5px;font-weight:600;font-family:inherit;text-decoration:none;border:1px solid transparent;cursor:pointer;transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease}
  .btn-primary{background:linear-gradient(120deg,#7c3aed,#a855f7 55%,#d946ef);color:#fff;box-shadow:0 12px 28px rgba(124,58,237,.32)}
  .btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 36px rgba(124,58,237,.44)}
  .btn-ghost{background:rgba(255,255,255,.92);color:var(--purple-deep);border-color:var(--line)}
  .btn-ghost:hover{background:#fff;transform:translateY(-2px);box-shadow:var(--shadow)}

  /* ---------- hero ---------- */
  .hero{position:relative;padding:72px 0 60px;overflow:hidden}
  .hero::before{content:"";position:absolute;inset:0;pointer-events:none;
    background-image:linear-gradient(rgba(124,58,237,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(124,58,237,.07) 1px,transparent 1px);
    background-size:58px 58px;
    -webkit-mask-image:radial-gradient(circle at 50% 22%,#000 0%,transparent 70%);
    mask-image:radial-gradient(circle at 50% 22%,#000 0%,transparent 70%)}
  .hero-inner{position:relative;text-align:center;max-width:900px;margin:0 auto}
  .hero-badge{display:inline-block;padding:5px 16px;border-radius:999px;font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--purple-deep);background:rgba(124,58,237,.1);border:1px solid var(--line);animation:riseIn .7s ease both}
  .hero h1{margin:20px 0 0;font-size:clamp(30px,5.2vw,52px);line-height:1.22;letter-spacing:-.02em;color:var(--ink);animation:riseIn .7s .1s ease both}
  .hero h1 em{font-style:normal;color:var(--purple-deep)}
  .hero-sub{margin:18px auto 0;max-width:720px;font-size:16px;color:var(--ink-2);animation:riseIn .7s .2s ease both}
  .hero-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin-top:30px;animation:riseIn .7s .3s ease both}
  .hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:48px;animation:riseIn .7s .42s ease both}
  .stat-card{background:var(--card-bg);border:1px solid var(--line);border-radius:16px;padding:20px 14px;text-align:center;box-shadow:var(--shadow);transition:transform .3s ease,box-shadow .3s ease}
  .stat-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
  .stat-card strong{display:block;font-size:26px;line-height:1.3;color:var(--purple-deep);letter-spacing:-.02em}
  .stat-card span{display:block;margin-top:4px;font-size:13px;color:var(--ink-3)}
  @keyframes riseIn{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}

  /* ---------- sections ---------- */
  section{padding:66px 0}
  .section-head{max-width:780px;margin:0 auto 40px;text-align:center}
  .eyebrow{display:inline-block;margin-bottom:14px;padding:4px 14px;border-radius:999px;font-size:13px;font-weight:600;letter-spacing:.12em;color:var(--purple-deep);background:rgba(124,58,237,.1);border:1px solid var(--line)}
  h2{font-size:clamp(23px,3.2vw,33px);line-height:1.34;letter-spacing:-.01em;color:var(--ink)}
  .section-head p{margin-top:12px;font-size:15.5px;color:var(--ink-3)}
  h3{font-size:17px;line-height:1.5;color:var(--ink)}

  .grid{display:grid;gap:20px}
  .grid-2{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(3,1fr)}
  .grid-4{grid-template-columns:repeat(4,1fr)}

  .card{background:var(--card-bg);border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;box-shadow:var(--shadow);transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease}
  .card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover);border-color:rgba(124,58,237,.34)}
  .card p{margin-top:10px;font-size:14.5px;color:var(--ink-3)}
  .card-tag{display:inline-block;margin-bottom:12px;padding:3px 11px;border-radius:999px;font-size:12px;font-weight:600;color:var(--purple-deep);background:rgba(124,58,237,.12)}

  /* ---------- about ---------- */
  .about-top{display:grid;grid-template-columns:1.15fr .85fr;gap:28px;align-items:start;margin-bottom:32px}
  .about-text p{font-size:15.5px;color:var(--ink-2)}
  .about-text p + p{margin-top:14px}
  .about-media{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px;box-shadow:var(--shadow)}
  .about-media .media-box{display:flex;align-items:center;justify-content:center;border-radius:12px;overflow:hidden;background:#f5f1ff}
  .about-media img{display:block;width:100%;height:auto;max-width:100%}

  /* ---------- tag cloud ---------- */
  .tag-cloud{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:28px}
  .tag-cloud span{padding:7px 16px;border-radius:999px;font-size:13.5px;color:var(--purple-deep);background:rgba(255,255,255,.9);border:1px solid var(--line);transition:transform .25s ease,box-shadow .25s ease,background .25s ease}
  .tag-cloud span:hover{transform:translateY(-3px);background:#fff;box-shadow:0 8px 18px rgba(124,58,237,.18)}
  .model-strip{margin-top:22px;padding:18px 20px;border-radius:16px;background:rgba(255,255,255,.78);border:1px dashed rgba(124,58,237,.3);text-align:center;font-size:14px;color:var(--ink-2);line-height:2}

  /* ---------- process ---------- */
  .steps{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
  .step{position:relative;background:var(--card-bg);border:1px solid var(--line);border-radius:16px;padding:22px 18px;box-shadow:var(--shadow);transition:transform .3s ease,box-shadow .3s ease}
  .step:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
  .step-num{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:10px;font-size:14px;font-weight:700;color:#fff;background:linear-gradient(120deg,#7c3aed,#d946ef);margin-bottom:12px}
  .step h3{font-size:16px}
  .step p{margin-top:8px;font-size:13.5px;color:var(--ink-3)}

  /* ---------- network ---------- */
  .net-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
  .net-card{background:linear-gradient(160deg,rgba(255,255,255,.94),rgba(248,243,255,.9));border:1px solid var(--line);border-radius:16px;padding:22px 20px;box-shadow:var(--shadow);transition:transform .3s ease,box-shadow .3s ease}
  .net-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
  .net-card strong{display:block;font-size:16px;color:var(--purple-deep)}
  .net-card p{margin-top:8px;font-size:13.5px;color:var(--ink-3)}

  /* ---------- cases ---------- */
  .case-media{display:flex;align-items:center;justify-content:center;aspect-ratio:4/3;border-radius:14px;overflow:hidden;background:#f5f1ff;border:1px solid rgba(124,58,237,.1)}
  .case-media img{display:block;width:100%;height:100%;object-fit:contain}
  .case-card{padding:18px}
  .case-card h3{margin-top:14px;font-size:16px}
  .case-card p{margin-top:6px;font-size:13.5px;color:var(--ink-3)}

  /* ---------- compare ---------- */
  .rate-panel{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:26px;padding:26px 24px;margin-bottom:26px;border-radius:var(--radius);background:linear-gradient(120deg,rgba(124,58,237,.12),rgba(217,70,239,.1));border:1px solid rgba(124,58,237,.22);text-align:center}
  .rate-score strong{display:block;font-size:44px;line-height:1.1;color:var(--purple-deep);letter-spacing:-.03em}
  .rate-score span{font-size:13px;color:var(--ink-3)}
  .rate-stars{font-size:24px;letter-spacing:4px;color:#f59e0b}
  .rate-desc{flex:1 1 260px;min-width:220px;font-size:14.5px;color:var(--ink-2)}

  .table-wrap{overflow-x:auto;border-radius:16px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow);-webkit-overflow-scrolling:touch}
  table{width:100%;border-collapse:collapse;min-width:680px;font-size:14.5px}
  thead th{background:rgba(124,58,237,.09);color:var(--purple-deep);font-weight:600;text-align:left;padding:15px 18px;white-space:nowrap;border-bottom:1px solid rgba(124,58,237,.16)}
  tbody td{padding:14px 18px;border-bottom:1px solid rgba(124,58,237,.09);color:var(--ink-2);vertical-align:top}
  tbody tr:last-child td{border-bottom:none}
  tbody tr:hover td{background:rgba(124,58,237,.04)}
  tbody td:first-child{color:var(--ink);font-weight:600}
  tbody td:nth-child(2){color:#5b21b6;font-weight:600}
  .table-note{margin-top:14px;font-size:13.5px;color:var(--ink-3);text-align:center}

  /* ---------- form ---------- */
  .match-wrap{display:grid;grid-template-columns:1fr 1.1fr;gap:28px;align-items:start}
  .match-info .card{background:rgba(255,255,255,.86)}
  .match-list{list-style:none;margin-top:16px;display:grid;gap:12px}
  .match-list li{display:flex;gap:10px;font-size:14.5px;color:var(--ink-2)}
  .match-list li::before{content:"✓";flex-shrink:0;display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;margin-top:4px;border-radius:50%;font-size:12px;font-weight:700;color:#fff;background:linear-gradient(120deg,#7c3aed,#d946ef)}
  .req-form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;box-shadow:var(--shadow)}
  .form-row{margin-bottom:16px}
  .form-row label{display:block;margin-bottom:7px;font-size:14px;font-weight:600;color:var(--ink-2)}
  .form-row input,.form-row select,.form-row textarea{width:100%;padding:11px 14px;font-size:14.5px;font-family:inherit;color:var(--ink);background:#faf8ff;border:1px solid rgba(124,58,237,.22);border-radius:10px;outline:none;transition:border-color .22s ease,box-shadow .22s ease,background .22s ease}
  .form-row input:focus,.form-row select:focus,.form-row textarea:focus{border-color:var(--purple);background:#fff;box-shadow:0 0 0 3px rgba(124,58,237,.14)}
  .form-row textarea{min-height:110px;resize:vertical}
  .form-note{margin-top:12px;font-size:12.5px;color:var(--ink-3);text-align:center}

  /* ---------- reviews ---------- */
  .review-card{display:flex;flex-direction:column;height:100%}
  .review-stars{font-size:15px;letter-spacing:3px;color:#f59e0b}
  .review-text{margin-top:12px;font-size:14.5px;color:var(--ink-2);flex:1}
  .review-user{display:flex;align-items:center;gap:12px;margin-top:18px;padding-top:16px;border-top:1px solid rgba(124,58,237,.12)}
  .review-avatar{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:50%;font-size:15px;font-weight:700;color:#fff;background:linear-gradient(120deg,#7c3aed,#d946ef);flex-shrink:0}
  .review-user strong{display:block;font-size:14px;color:var(--ink)}
  .review-user span{display:block;font-size:12.5px;color:var(--ink-3)}

  /* ---------- faq ---------- */
  .help-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:30px}
  .help-card{background:rgba(255,255,255,.86);border:1px solid var(--line);border-radius:14px;padding:18px;box-shadow:var(--shadow);transition:transform .3s ease,box-shadow .3s ease}
  .help-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
  .help-card h3{font-size:15px}
  .help-card p{margin-top:6px;font-size:13px;color:var(--ink-3)}

  .faq-list{display:grid;gap:12px;max-width:920px;margin:0 auto}
  .faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);overflow:hidden;transition:border-color .25s ease,box-shadow .25s ease}
  .faq-item.open{border-color:rgba(124,58,237,.4);box-shadow:var(--shadow-hover)}
  .faq-q{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;padding:17px 20px;font-size:15.5px;font-weight:600;font-family:inherit;text-align:left;color:var(--ink);background:transparent;border:none;cursor:pointer}
  .faq-icon{flex-shrink:0;display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:50%;font-size:15px;font-weight:700;color:var(--purple-deep);background:rgba(124,58,237,.12);transition:transform .3s ease,background .3s ease,color .3s ease}
  .faq-item.open .faq-icon{transform:rotate(45deg);color:#fff;background:linear-gradient(120deg,#7c3aed,#d946ef)}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .34s ease}
  .faq-a p{padding:0 20px 18px;font-size:14.5px;color:var(--ink-3)}

  /* ---------- articles ---------- */
  .article-list{display:grid;gap:14px;max-width:920px;margin:0 auto}
  .article-item{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:20px 22px;border-radius:14px;background:rgba(255,255,255,.88);border:1px solid var(--line);box-shadow:var(--shadow);text-decoration:none;color:inherit;transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease}
  .article-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(124,58,237,.34)}
  .article-body h3{font-size:15.5px;color:var(--ink)}
  .article-body p{margin-top:6px;font-size:13.5px;color:var(--ink-3)}
  .article-arrow{flex-shrink:0;font-size:18px;color:var(--purple-deep);transition:transform .3s ease}
  .article-item:hover .article-arrow{transform:translateX(4px)}

  /* ---------- join ---------- */
  .join-panel{position:relative;overflow:hidden;border-radius:22px;padding:44px 34px;text-align:center;background:linear-gradient(130deg,#4c1d95,#7c3aed 52%,#c026d3);box-shadow:0 22px 46px rgba(76,29,149,.3)}
  .join-panel::after{content:"";position:absolute;width:420px;height:420px;right:-160px;top:-180px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.32),rgba(255,255,255,0) 70%)}
  .join-panel h2{position:relative;color:#fff}
  .join-panel p{position:relative;margin:14px auto 0;max-width:680px;font-size:15px;color:#efe6ff}
  .join-actions{position:relative;display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin-top:26px}
  .join-panel .btn-ghost{background:rgba(255,255,255,.94);color:#5b21b6;border-color:transparent}
  .join-panel .btn-primary{background:#fff;color:#5b21b6;box-shadow:0 12px 26px rgba(0,0,0,.16)}
  .join-panel .btn-primary:hover{background:#f7f2ff}

  /* ---------- contact ---------- */
  .contact-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:start}
  .contact-list{list-style:none;display:grid;gap:12px;margin-top:16px}
  .contact-list li{display:flex;flex-wrap:wrap;gap:8px;font-size:14.5px;color:var(--ink-2)}
  .contact-list li b{color:var(--ink);font-weight:600;min-width:96px}
  .qr-card{text-align:center}
  .qr-card img{display:block;width:100%;max-width:190px;height:auto;margin:0 auto;border-radius:12px;border:1px solid var(--line)}
  .qr-card p{margin-top:10px;font-size:13.5px;color:var(--ink-3)}

  /* ---------- footer ---------- */
  .site-footer{position:relative;margin-top:20px;padding:44px 0 26px;background:linear-gradient(150deg,#2b1a52,#3d2174 60%,#2a1747);color:#e6ddff}
  .footer-top{display:grid;grid-template-columns:1fr 1.2fr;gap:32px;align-items:start}
  .footer-brand .ai-page-logo{filter:brightness(0) invert(1);opacity:.95}
  .footer-brand p{margin-top:12px;font-size:13.5px;color:#cfc2f2}
  .footer-links h3{font-size:15px;color:#fff;margin-bottom:12px}
  .footer-links ul{list-style:none;display:flex;flex-wrap:wrap;gap:10px}
  .footer-links li a{display:inline-block;padding:6px 14px;border-radius:999px;font-size:13px;color:#ddd0ff;text-decoration:none;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.16);transition:background .25s ease,color .25s ease,transform .25s ease}
  .footer-links li a:hover{background:#fff;color:#3d2174;transform:translateY(-2px)}
  .footer-bottom{margin-top:32px;padding-top:20px;border-top:1px solid rgba(255,255,255,.16);font-size:13px;color:#bfb0e8;text-align:center}
  .footer-bottom a{color:#fff;text-decoration:none;border-bottom:1px solid rgba(255,255,255,.45)}

  /* ---------- float tools ---------- */
  .float-tools{position:fixed;right:18px;bottom:22px;z-index:120;display:flex;flex-direction:column;align-items:flex-end;gap:12px}
  .kefu{position:relative;display:flex;flex-direction:column;align-items:flex-end}
  .float-btn{display:inline-flex;align-items:center;justify-content:center;min-width:56px;height:52px;padding:0 16px;border:none;border-radius:16px;font-size:14px;font-weight:600;font-family:inherit;color:#fff;cursor:pointer;background:linear-gradient(130deg,#7c3aed,#d946ef);box-shadow:0 12px 26px rgba(124,58,237,.36);transition:transform .25s ease,box-shadow .25s ease}
  .float-btn:hover{transform:translateY(-3px);box-shadow:0 16px 32px rgba(124,58,237,.48)}
  .back-top{width:52px;min-width:52px;padding:0;background:#fff;color:var(--purple-deep);border:1px solid var(--line);box-shadow:var(--shadow)}
  .back-top:hover{box-shadow:var(--shadow-hover)}
  .kefu-panel{position:absolute;right:0;bottom:calc(100% + 12px);width:238px;padding:16px;border-radius:16px;background:#fff;border:1px solid var(--line);box-shadow:0 20px 44px rgba(60,20,120,.22);opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .28s ease,transform .28s ease,visibility .28s ease;text-align:center}
  .kefu-panel.show{opacity:1;visibility:visible;transform:translateY(0)}
  .kefu-panel h3{font-size:15px;color:var(--ink);margin-bottom:10px}
  .kefu-panel img{display:block;width:100%;max-width:150px;height:auto;margin:0 auto 10px;border-radius:10px;border:1px solid var(--line)}
  .kefu-panel p{font-size:13px;line-height:1.9;color:var(--ink-3)}

  /* ---------- reveal ---------- */
  .js .reveal{opacity:0;transform:translateY(22px);transition:opacity .65s ease,transform .65s ease}
  .js .reveal.in{opacity:1;transform:translateY(0)}

  /* ---------- responsive ---------- */
  @media (max-width:1000px){
    .nav-links{position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;flex-wrap:nowrap;margin-left:0;padding:8px 16px 16px;max-height:0;overflow:hidden;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 16px 30px rgba(88,50,160,.12);transition:max-height .36s ease}
    .nav-links.open{max-height:520px}
    .nav-links a{padding:11px 12px;font-size:15px}
    .nav-toggle{display:inline-flex}
    .nav-wrap{position:relative}
    .about-top{grid-template-columns:1fr}
    .match-wrap{grid-template-columns:1fr}
    .contact-grid{grid-template-columns:1fr}
    .steps{grid-template-columns:repeat(2,1fr)}
    .net-grid{grid-template-columns:repeat(2,1fr)}
    .help-grid{grid-template-columns:repeat(2,1fr)}
    .footer-top{grid-template-columns:1fr}
  }
  @media (max-width:900px){
    .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
    .hero-stats{grid-template-columns:repeat(2,1fr)}
  }
  @media (max-width:620px){
    section{padding:52px 0}
    .hero{padding:52px 0 46px}
    .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
    .steps{grid-template-columns:1fr}
    .net-grid{grid-template-columns:1fr}
    .help-grid{grid-template-columns:1fr}
    .hero-stats{grid-template-columns:repeat(2,1fr)}
    .hero-actions .btn{width:100%}
    .rate-panel{padding:22px 18px;gap:16px}
    .join-panel{padding:34px 22px}
    .article-item{flex-direction:column;align-items:flex-start;gap:8px}
    .article-arrow{display:none}
  }
  @media (prefers-reduced-motion:reduce){
    *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
    html{scroll-behavior:auto}
  }