/* RiaBy Security — shared styles */
:root{
  --bg:#070B14;
  --bg-soft:#0B1220;
  --surface:#0F1A2E;
  --surface-2:#13203A;
  --border:rgba(148,163,184,0.14);
  --border-strong:rgba(148,163,184,0.28);
  --text:#E6EDF7;
  --muted:#8CA3C3;
  --muted-2:#5B7094;
  --accent:#38BDF8;
  --accent-dim:rgba(56,189,248,0.12);
  --accent-2:#6366F1;
  --danger:#F43F5E;
  --success:#34D399;
  --radius:16px;
  --radius-sm:10px;
  --maxw:1180px;
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-mono:"SF Mono","Cascadia Code","JetBrains Mono",Consolas,"Courier New",monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:var(--font-sans);line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
::selection{background:rgba(56,189,248,.28);color:#fff}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}

.bg-grid{
  position:fixed;inset:0;z-index:-2;pointer-events:none;
  background-image:
    linear-gradient(rgba(56,189,248,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(56,189,248,.05) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 40%,transparent 100%);
  -webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 40%,transparent 100%);
}
.bg-glow{
  position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(600px 420px at 15% -10%,rgba(56,189,248,.14),transparent 60%),
    radial-gradient(700px 500px at 85% 5%,rgba(99,102,241,.12),transparent 60%),
    radial-gradient(800px 600px at 50% 110%,rgba(244,63,94,.06),transparent 60%);
}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 32px}
section{position:relative;padding:120px 0}

/* nav */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  background:rgba(7,11,20,.72);
  border-bottom:1px solid transparent;
  transition:background .3s var(--ease),border-color .3s var(--ease);
}
.nav.scrolled{background:rgba(7,11,20,.9);border-bottom-color:var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:12px;font-weight:700;letter-spacing:.2px}
.logo-mark{
  width:34px;height:34px;border-radius:9px;position:relative;flex:none;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  box-shadow:0 0 24px rgba(56,189,248,.35);
}
.logo-mark::after{
  content:"";position:absolute;inset:7px;border-radius:5px;
  background:var(--bg);
  clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%);
}
.logo-name{font-size:17px}
.logo-name em{font-style:normal;color:var(--accent)}
.logo-sub{font-size:11px;color:var(--muted-2);letter-spacing:2px;font-family:var(--font-mono);margin-top:1px}
.nav-links{display:flex;align-items:center;gap:30px}
.nav-links a{font-size:14px;color:var(--muted);transition:color .2s;position:relative}
.nav-links a:hover{color:var(--text)}
.nav-links a.active{color:var(--text)}
.nav-links a.active::after{content:"";position:absolute;left:0;bottom:-6px;width:100%;height:2px;background:var(--accent)}
.nav-links a:not(.active)::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;background:var(--accent);transition:width .25s var(--ease)}
.nav-links a:not(.active):hover::after{width:100%}
.nav-cta{
  padding:9px 18px;border-radius:999px;font-size:13.5px;font-weight:600;color:#04101F;
  background:var(--accent);transition:transform .2s var(--ease),box-shadow .2s;
}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 8px 28px rgba(56,189,248,.35)}
.nav-burger{display:none;background:none;border:1px solid var(--border-strong);border-radius:8px;width:40px;height:40px;color:var(--text);font-size:18px;cursor:pointer}
.mobile-menu{
  display:none;position:fixed;top:72px;left:0;right:0;z-index:99;
  background:rgba(7,11,20,.98);border-bottom:1px solid var(--border);
  padding:20px 32px 28px;flex-direction:column;gap:6px;
}
.mobile-menu.open{display:flex}
.mobile-menu a{padding:12px 4px;font-size:16px;color:var(--muted);border-bottom:1px solid var(--border)}
.mobile-menu a:last-child{border-bottom:none}

/* hero */
.hero{min-height:100svh;display:flex;align-items:center;padding:140px 0 100px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border-radius:999px;
  border:1px solid var(--border-strong);background:var(--accent-dim);font-size:12.5px;color:var(--accent);
  font-family:var(--font-mono);letter-spacing:.4px;margin-bottom:28px;
}
.hero-badge .dot{width:7px;height:7px;border-radius:50%;background:var(--success);box-shadow:0 0 10px var(--success);animation:pulse 2.4s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
.hero h1{
  font-size:clamp(44px,7vw,84px);line-height:1.06;font-weight:800;letter-spacing:-1.5px;
  margin-bottom:26px;
}
.hero h1 .grad{
  background:linear-gradient(92deg,var(--accent) 10%,var(--accent-2) 55%,#93C5FD 90%);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.hero p.lead{font-size:clamp(16px,2vw,20px);color:var(--muted);max-width:620px;margin-bottom:40px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;align-items:center;margin-bottom:64px}
.btn{
  display:inline-flex;align-items:center;gap:10px;padding:14px 28px;border-radius:12px;
  font-size:15px;font-weight:600;transition:transform .2s var(--ease),box-shadow .2s,background .2s;
}
.btn-primary{background:var(--accent);color:#04101F;box-shadow:0 0 0 1px rgba(56,189,248,.4),0 10px 40px rgba(56,189,248,.22)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(56,189,248,.6),0 16px 48px rgba(56,189,248,.32)}
.btn-ghost{border:1px solid var(--border-strong);color:var(--text);background:rgba(15,26,46,.4)}
.btn-ghost:hover{border-color:var(--accent);background:var(--accent-dim);transform:translateY(-2px)}
.hero-meta{display:flex;gap:40px;flex-wrap:wrap;font-family:var(--font-mono);font-size:13px;color:var(--muted-2)}
.hero-meta b{display:block;font-size:22px;color:var(--text);font-weight:600;letter-spacing:-.5px;margin-bottom:2px}
.hero-meta b span{color:var(--accent)}

.terminal{
  margin-top:72px;border:1px solid var(--border-strong);border-radius:14px;
  background:rgba(10,16,30,.78);backdrop-filter:blur(8px);
  box-shadow:0 24px 80px rgba(0,0,0,.45);overflow:hidden;max-width:760px;
}
.term-bar{display:flex;align-items:center;gap:8px;padding:12px 16px;border-bottom:1px solid var(--border)}
.term-bar i{width:11px;height:11px;border-radius:50%}
.term-bar i:nth-child(1){background:#F43F5E}
.term-bar i:nth-child(2){background:#FBBF24}
.term-bar i:nth-child(3){background:#34D399}
.term-title{margin-left:10px;font-family:var(--font-mono);font-size:12px;color:var(--muted-2)}
.term-body{padding:20px 22px;font-family:var(--font-mono);font-size:13.5px;line-height:1.9;min-height:220px;overflow-x:auto}
.term-body .ln{color:var(--muted-2);margin-right:14px;user-select:none}
.term-body .ok{color:var(--success)}
.term-body .warn{color:#FBBF24}
.term-body .acc{color:var(--accent)}
.term-body .dim{color:var(--muted-2)}
.term-cursor{display:inline-block;width:8px;height:15px;background:var(--accent);vertical-align:middle;animation:blink 1s step-end infinite}
@keyframes blink{50%{opacity:0}}

/* page hero (inner pages) */
.page-hero{padding:190px 0 90px}
.page-hero .sec-tag{margin-bottom:18px}
.page-hero h1{font-size:clamp(36px,5vw,60px);font-weight:800;letter-spacing:-1.5px;line-height:1.12;margin-bottom:20px}
.page-hero h1 .grad{background:linear-gradient(92deg,var(--accent) 10%,var(--accent-2) 55%,#93C5FD 90%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.page-hero p.lead{font-size:17px;color:var(--muted);max-width:680px}

/* section head */
.sec-tag{display:inline-block;font-family:var(--font-mono);font-size:12.5px;letter-spacing:2px;color:var(--accent);margin-bottom:16px;text-transform:uppercase}
.sec-tag::before{content:"// ";color:var(--muted-2)}
.sec-title{font-size:clamp(28px,3.6vw,42px);font-weight:800;letter-spacing:-1px;line-height:1.2;margin-bottom:18px}
.sec-sub{font-size:16.5px;color:var(--muted);max-width:640px;margin-bottom:56px}

/* product cards */
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.prod-card{
  position:relative;border:1px solid var(--border);border-radius:var(--radius);
  background:linear-gradient(180deg,var(--surface),rgba(15,26,46,.35));
  padding:36px 30px;transition:transform .3s var(--ease),border-color .3s,box-shadow .3s;
  overflow:hidden;
}
.prod-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));opacity:.6;
}
.prod-card:hover{transform:translateY(-6px);border-color:var(--border-strong);box-shadow:0 20px 60px rgba(0,0,0,.4)}
.prod-ver{font-family:var(--font-mono);font-size:13px;color:var(--accent);letter-spacing:1px;margin-bottom:14px;display:inline-flex;align-items:center;gap:8px}
.prod-ver .tag{background:var(--accent-dim);border:1px solid rgba(56,189,248,.25);padding:3px 9px;border-radius:6px}
.prod-card h3{font-size:22px;font-weight:700;margin-bottom:10px}
.prod-card p{color:var(--muted);font-size:14.5px;margin-bottom:24px}
.prod-list{list-style:none;display:flex;flex-direction:column;gap:10px}
.prod-list li{display:flex;gap:10px;font-size:13.5px;color:var(--muted);align-items:flex-start}
.prod-list li::before{content:"▸";color:var(--accent);flex:none}

/* capability cards */
.cap-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.cap-card{
  border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);
  padding:30px 28px;display:flex;gap:20px;transition:border-color .3s,transform .3s var(--ease);
}
.cap-card:hover{border-color:var(--border-strong);transform:translateY(-4px)}
.cap-icon{
  width:46px;height:46px;flex:none;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:var(--accent-dim);border:1px solid rgba(56,189,248,.25);font-size:20px;color:var(--accent);
}
.cap-card h4{font-size:17px;font-weight:700;margin-bottom:8px}
.cap-card p{font-size:14px;color:var(--muted)}

/* about */
.about-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:48px;align-items:center}
.about-copy p{color:var(--muted);font-size:15.5px;margin-bottom:18px}
.about-copy p b{color:var(--text);font-weight:600}
.about-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.stat-card{border:1px solid var(--border);border-radius:14px;background:var(--surface);padding:24px 20px;text-align:center}
.stat-card b{display:block;font-size:32px;font-weight:800;letter-spacing:-1px;color:var(--accent);font-family:var(--font-mono)}
.stat-card span{font-size:12.5px;color:var(--muted-2);letter-spacing:1px;margin-top:6px;display:block}

/* cta band */
.cta-band{
  border:1px solid var(--border-strong);border-radius:24px;position:relative;overflow:hidden;
  background:linear-gradient(120deg,rgba(56,189,248,.10),rgba(99,102,241,.08) 55%,rgba(244,63,94,.05));
  padding:64px 56px;text-align:center;
}
.cta-band h2{font-size:clamp(26px,3.4vw,40px);font-weight:800;letter-spacing:-1px;margin-bottom:14px}
.cta-band p{color:var(--muted);max-width:520px;margin:0 auto 32px;font-size:15.5px}
.cta-contact{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;font-family:var(--font-mono);font-size:13.5px;color:var(--muted)}
.cta-contact code{border:1px solid var(--border);background:var(--surface);padding:8px 14px;border-radius:8px;color:var(--accent)}

/* footer */
footer{border-top:1px solid var(--border);padding:48px 0 40px;margin-top:40px}
.footer-inner{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.footer-logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:15px}
.footer-logo .logo-mark{width:26px;height:26px;border-radius:7px}
.footer-logo .logo-mark::after{inset:5px;border-radius:4px}
.footer-meta{font-size:13px;color:var(--muted-2);font-family:var(--font-mono)}
.footer-links{display:flex;gap:24px}
.footer-links a{font-size:13px;color:var(--muted);transition:color .2s}
.footer-links a:hover{color:var(--accent)}

/* inner page extra components */
/* timeline */
.timeline{position:relative;max-width:820px;margin:0 auto}
.timeline::before{content:"";position:absolute;left:18px;top:8px;bottom:8px;width:2px;background:linear-gradient(180deg,var(--accent),var(--accent-2),transparent)}
.tl-item{position:relative;padding:0 0 44px 60px}
.tl-dot{position:absolute;left:10px;top:6px;width:18px;height:18px;border-radius:50%;background:var(--bg);border:3px solid var(--accent);box-shadow:0 0 16px rgba(56,189,248,.5)}
.tl-date{font-family:var(--font-mono);font-size:13px;color:var(--accent);letter-spacing:1px;margin-bottom:6px}
.tl-item h4{font-size:19px;font-weight:700;margin-bottom:8px}
.tl-item p{font-size:14.5px;color:var(--muted);max-width:620px}

/* comparison table */
.table-wrap{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;overflow-x:auto}
table{width:100%;border-collapse:collapse;min-width:680px}
th{font-family:var(--font-mono);font-size:13px;letter-spacing:1px;text-transform:uppercase;color:var(--accent);text-align:left;padding:18px 22px;background:var(--surface-2);border-bottom:1px solid var(--border-strong);white-space:nowrap}
td{padding:16px 22px;font-size:14.5px;color:var(--muted);border-bottom:1px solid var(--border);vertical-align:top}
tr:last-child td{border-bottom:none}
td b{color:var(--text);font-weight:600}
td .yes{color:var(--success)}
td .no{color:var(--muted-2)}

/* feature detail blocks */
.feat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.feat-card{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);padding:32px 30px;transition:border-color .3s,transform .3s var(--ease)}
.feat-card:hover{border-color:var(--border-strong);transform:translateY(-4px)}
.feat-card .feat-no{font-family:var(--font-mono);font-size:12px;color:var(--accent);letter-spacing:1px;margin-bottom:12px;display:block}
.feat-card h3{font-size:19px;font-weight:700;margin-bottom:10px}
.feat-card p{font-size:14.5px;color:var(--muted)}

/* steps flow */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.step{position:relative;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);padding:28px 24px}
.step::before{counter-increment:step;content:"0" counter(step);font-family:var(--font-mono);font-size:12px;color:var(--accent);letter-spacing:1px;display:block;margin-bottom:12px}
.step h4{font-size:16px;font-weight:700;margin-bottom:8px}
.step p{font-size:13.5px;color:var(--muted)}

/* articles */
.article-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.article{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);padding:32px 30px;transition:border-color .3s,transform .3s var(--ease);display:block}
.article:hover{border-color:var(--border-strong);transform:translateY(-4px)}
.article .a-date{font-family:var(--font-mono);font-size:12.5px;color:var(--muted-2);letter-spacing:1px;margin-bottom:14px;display:block}
.article h3{font-size:19px;font-weight:700;margin-bottom:10px;line-height:1.35}
.article p{font-size:14px;color:var(--muted)}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:48px;align-items:start}
.contact-card{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);padding:28px 26px;display:flex;gap:18px;margin-bottom:18px}
.contact-card .cap-icon{margin-top:2px}
.contact-card h4{font-size:16px;font-weight:700;margin-bottom:6px}
.contact-card p{font-size:14px;color:var(--muted);word-break:break-all}
.form{display:flex;flex-direction:column;gap:18px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);padding:34px 30px}
.form label{font-size:13.5px;color:var(--muted);font-weight:600}
.form input,.form textarea{
  width:100%;background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius-sm);
  padding:14px 16px;color:var(--text);font-size:14.5px;font-family:var(--font-sans);outline:none;transition:border-color .2s;
}
.form input:focus,.form textarea:focus{border-color:var(--accent)}
.form textarea{min-height:140px;resize:vertical}
.form .btn{align-self:flex-start}

/* reveal */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.visible{opacity:1;transform:none}

/* 404 */
.error-wrap{min-height:100svh;display:flex;align-items:center;justify-content:center;text-align:center;padding:120px 32px}
.error-code{font-family:var(--font-mono);font-size:clamp(80px,16vw,160px);font-weight:800;letter-spacing:-4px;line-height:1;background:linear-gradient(92deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:24px}
.error-wrap h1{font-size:24px;font-weight:700;margin-bottom:12px}
.error-wrap p{color:var(--muted);margin-bottom:32px}

@media(max-width:960px){
  .prod-grid,.cap-grid,.feat-grid,.article-grid{grid-template-columns:1fr}
  .about-grid,.contact-grid{grid-template-columns:1fr}
  .nav-links{display:none}
  .nav-burger{display:block}
  .hero-meta{gap:24px}
  .steps{grid-template-columns:repeat(2,1fr)}
  section{padding:88px 0}
}
@media(max-width:640px){
  .wrap{padding:0 20px}
  .cta-band{padding:44px 24px}
  .footer-inner{flex-direction:column;text-align:center}
  .steps{grid-template-columns:1fr}
  .timeline{padding-left:2px}
  .timeline::before{left:9px;top:6px;bottom:6px}
  .tl-item{padding:0 0 36px 34px}
  .tl-dot{left:1px;top:4px;width:16px;height:16px}
  .tl-date{font-size:12.5px;letter-spacing:.5px;line-height:1.5;word-break:break-word}
  .tl-item h4{font-size:17px;line-height:1.45;word-break:break-word}
  .tl-item p{font-size:13.5px;max-width:100%;line-height:1.75;word-break:break-word}
  .case-metrics{grid-template-columns:repeat(3,1fr);gap:6px}
  .case-metric b{font-size:17px}
  .case-metric span{font-size:11px;line-height:1.4}
  .hero-meta{gap:14px}
  .hero-actions{gap:12px}
  .hero-actions .btn{width:100%;text-align:center}
  .term-body{padding:16px 14px;font-size:12.5px}
}

/* ===== blog / research list ===== */
.post-list{display:flex;flex-direction:column;gap:20px;max-width:860px}
.post-card{display:block;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);padding:30px 32px;transition:border-color .3s,transform .3s var(--ease);position:relative;overflow:hidden}
.post-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:linear-gradient(180deg,var(--accent),var(--accent-2));opacity:0;transition:opacity .3s}
.post-card:hover{border-color:var(--border-strong);transform:translateY(-3px)}
.post-card:hover::before{opacity:1}
.post-tag{display:inline-block;font-family:var(--font-mono);font-size:11.5px;letter-spacing:1px;color:var(--accent);border:1px solid rgba(56,189,248,.25);background:var(--accent-dim);padding:3px 10px;border-radius:6px;margin-bottom:14px}
.post-card h3{font-size:19px;font-weight:700;margin-bottom:10px;line-height:1.4}
.post-card p{font-size:14.5px;color:var(--muted);margin-bottom:16px;max-width:720px}
.post-meta{font-family:var(--font-mono);font-size:12.5px;color:var(--muted-2);letter-spacing:.5px}

/* article detail */
.post-body{max-width:780px;margin:0 auto;font-size:15.5px;color:var(--muted);line-height:1.9}
.post-body h2{font-size:24px;font-weight:700;color:var(--text);margin:44px 0 18px;letter-spacing:-.5px}
.post-body h3{font-size:19px;font-weight:700;color:var(--text);margin:32px 0 14px}
.post-body p{margin-bottom:18px}
.post-body ul,.post-body ol{margin:0 0 18px 22px}
.post-body li{margin-bottom:8px}
.post-body strong{color:var(--text)}
.post-body blockquote{border-left:3px solid var(--accent);background:var(--accent-dim);padding:14px 20px;border-radius:0 10px 10px 0;margin:24px 0;color:var(--text)}
.post-body code{font-family:var(--font-mono);background:var(--surface-2);border:1px solid var(--border);padding:2px 7px;border-radius:6px;font-size:13.5px;color:var(--accent)}
.post-body pre{background:var(--surface-2);border:1px solid var(--border);border-radius:12px;padding:20px 22px;overflow-x:auto;margin:24px 0}
.post-body pre code{background:none;border:none;padding:0;color:var(--text);font-size:13.5px;line-height:1.8}
.post-body .note{border:1px solid rgba(52,211,153,.3);background:rgba(52,211,153,.07);border-radius:10px;padding:14px 18px;margin:22px 0;font-size:14px;color:var(--text)}
.post-back{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:13px;color:var(--muted);margin-bottom:28px;transition:color .2s}
.post-back:hover{color:var(--accent)}
.article-hero-info{display:flex;gap:18px;flex-wrap:wrap;align-items:center;font-family:var(--font-mono);font-size:13px;color:var(--muted-2);margin-top:18px}
.article-hero-info .post-tag{margin-bottom:0}
.post-author{display:flex;align-items:center;gap:12px;margin-top:22px}
.post-author .avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent-2));display:flex;align-items:center;justify-content:center;font-weight:800;font-size:15px;color:#04101F;flex:none}
.post-author b{display:block;font-size:14.5px;color:var(--text)}
.post-author span{font-size:12.5px;color:var(--muted-2)}
.article-nav{display:flex;justify-content:space-between;gap:16px;margin-top:56px;padding-top:28px;border-top:1px solid var(--border)}
.article-nav a{flex:1;border:1px solid var(--border);border-radius:12px;background:var(--surface);padding:18px 20px;transition:border-color .3s,transform .3s var(--ease)}
.article-nav a:hover{border-color:var(--accent);transform:translateY(-2px)}
.article-nav .an-dir{display:block;font-family:var(--font-mono);font-size:11.5px;color:var(--muted-2);letter-spacing:1px;margin-bottom:6px}
.article-nav .an-title{font-size:14.5px;font-weight:600;color:var(--text)}
.article-nav a.next{text-align:right}

/* team */
.team-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.member-card{border:1px solid var(--border);border-radius:var(--radius);background:linear-gradient(180deg,var(--surface),rgba(15,26,46,.35));padding:34px 30px;text-align:center;transition:transform .3s var(--ease),border-color .3s;position:relative;overflow:hidden}
.member-card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent),var(--accent-2));opacity:.5}
.member-card:hover{transform:translateY(-5px);border-color:var(--border-strong)}
.avatar-lg{width:76px;height:76px;margin:0 auto 20px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent-2));display:flex;align-items:center;justify-content:center;font-size:26px;font-weight:800;color:#04101F;box-shadow:0 0 32px rgba(56,189,248,.35)}
.member-card h3{font-size:19px;font-weight:700;margin-bottom:4px}
.member-role{font-family:var(--font-mono);font-size:12px;color:var(--accent);letter-spacing:1px;margin-bottom:14px}
.member-card p{font-size:13.5px;color:var(--muted);margin-bottom:16px}
.member-tags{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}
.member-tags span{font-family:var(--font-mono);font-size:11px;color:var(--muted);border:1px solid var(--border);padding:3px 10px;border-radius:999px}
.team-note{max-width:780px;margin:44px auto 0;text-align:center;color:var(--muted-2);font-size:13.5px}

/* partners */
.partner-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.partner-card{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);padding:30px 28px;transition:border-color .3s,transform .3s var(--ease);display:flex;gap:20px;align-items:flex-start}
.partner-card:hover{border-color:var(--border-strong);transform:translateY(-4px)}
.partner-badge{width:52px;height:52px;flex:none;border-radius:12px;background:var(--accent-dim);border:1px solid rgba(56,189,248,.25);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:20px;color:var(--accent);font-family:var(--font-mono)}
.partner-card h3{font-size:17px;font-weight:700;margin-bottom:8px}
.partner-card p{font-size:14px;color:var(--muted)}
.coop-types{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.coop-card{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);padding:28px 24px;text-align:center;transition:border-color .3s,transform .3s var(--ease)}
.coop-card:hover{border-color:var(--accent);transform:translateY(-4px)}
.coop-icon{font-size:26px;margin-bottom:12px;display:block;color:var(--accent)}
.coop-card h4{font-size:15.5px;font-weight:700;margin-bottom:8px}
.coop-card p{font-size:13px;color:var(--muted)}

/* docs */
.docs-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.doc-card{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);padding:30px 28px;display:flex;gap:18px;align-items:flex-start;transition:border-color .3s,transform .3s var(--ease);position:relative;overflow:hidden}
.doc-card::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--accent);opacity:0;transition:opacity .3s}
.doc-card:hover{border-color:var(--border-strong);transform:translateY(-4px)}
.doc-card:hover::before{opacity:1}
.doc-icon{width:46px;height:46px;flex:none;border-radius:12px;background:var(--accent-dim);border:1px solid rgba(56,189,248,.25);display:flex;align-items:center;justify-content:center;font-size:19px;color:var(--accent)}
.doc-card h3{font-size:17px;font-weight:700;margin-bottom:8px}
.doc-card p{font-size:13.5px;color:var(--muted);margin-bottom:14px}
.doc-meta{font-family:var(--font-mono);font-size:12px;color:var(--muted-2)}
.api-table td:first-child{font-family:var(--font-mono);font-size:13.5px;color:var(--accent);white-space:nowrap}
.warn-text{color:#FBBF24}
@media(max-width:960px){
  .team-grid,.partner-grid,.docs-grid{grid-template-columns:1fr}
  .coop-types{grid-template-columns:repeat(2,1fr)}
  .article-nav{flex-direction:column}
}
@media(max-width:640px){
  .coop-types{grid-template-columns:1fr}
  .post-card{padding:24px 22px}
}

/* === RiaBy dynamic effects === */
#bg-particles{position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.55}
nav,.mobile-menu,section,footer{position:relative;z-index:1}
.hero .hero-badge,.hero h1,.hero .lead,.hero .hero-actions,.hero .hero-meta,.hero .terminal{opacity:0;animation:rise .7s cubic-bezier(.2,.7,.3,1) forwards}
.hero .hero-badge{animation-delay:.08s}
.hero h1{animation-delay:.16s}
.hero .lead{animation-delay:.30s}
.hero .hero-actions{animation-delay:.44s}
.hero .hero-meta{animation-delay:.58s}
.hero .terminal{animation-delay:.72s}
@keyframes rise{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
.prod-card,.cap-card,.feat-card,.post-card,.stat-card{transition:transform .18s ease,border-color .3s ease,box-shadow .3s ease;will-change:transform}
.prod-card:hover,.cap-card:hover,.feat-card:hover,.post-card:hover,.stat-card:hover{border-color:rgba(0,229,255,.45)!important;box-shadow:0 14px 44px rgba(0,229,255,.14)}


/* ===== RiaBy pages v2 (cases/pricing/faq/compliance/careers/docs) ===== */
/* cases */
.case-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:24px;margin-top:40px}
.case-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;transition:transform .25s var(--ease),border-color .25s}
.case-card:hover{transform:translateY(-3px);border-color:var(--border-strong)}
.case-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}
.case-tag{font-family:var(--font-mono);font-size:12px;color:var(--accent);letter-spacing:.5px}
.case-ind{font-size:12px;color:var(--muted-2)}
.case-card h3{font-size:19px;margin-bottom:8px}
.case-scope{font-size:13px;color:var(--muted);margin-bottom:14px}
.case-block{margin:12px 0}
.case-block h4{font-size:13px;color:var(--muted-2);font-family:var(--font-mono);letter-spacing:.4px;margin-bottom:6px;text-transform:uppercase}
.case-block p,.case-block li{font-size:14px;color:var(--muted)}
.case-block ul{padding-left:18px}
.case-block li{margin:4px 0}
.case-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:16px;padding-top:16px;border-top:1px solid var(--border)}
.case-metric b{display:block;font-size:20px;color:var(--text)}
.case-metric span{font-size:12px;color:var(--muted-2)}
.placeholder-note{display:inline-flex;align-items:center;gap:6px;margin-top:12px;padding:7px 12px;border-radius:8px;background:rgba(244,63,94,.08);border:1px dashed rgba(244,63,94,.35);font-size:12.5px;color:var(--danger)}
/* pricing */
.price-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;margin-top:40px;align-items:stretch}
.price-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;display:flex;flex-direction:column;position:relative;transition:transform .25s var(--ease),border-color .25s}
.price-card:hover{transform:translateY(-3px);border-color:var(--border-strong)}
.price-card.hot{border-color:var(--accent);box-shadow:0 0 40px rgba(56,189,248,.12)}
.price-badge{position:absolute;top:-12px;left:50%;transform:translateX(-50%);padding:4px 14px;border-radius:999px;background:var(--accent);color:#04101F;font-size:12px;font-weight:700;letter-spacing:.4px;white-space:nowrap}
.price-name{font-size:16px;font-weight:700;color:var(--text);margin-bottom:4px}
.price-desc{font-size:13px;color:var(--muted);min-height:40px;margin-bottom:16px}
.price-num{font-size:34px;font-weight:800;color:var(--text);line-height:1;margin-bottom:4px}
.price-num em{font-style:normal;font-size:14px;color:var(--muted-2);font-weight:600}
.price-note{font-size:12px;color:var(--muted-2);margin-bottom:18px}
.price-feats{list-style:none;padding:0;margin:0 0 22px;flex:1}
.price-feats li{padding:7px 0;font-size:13.5px;color:var(--muted);border-bottom:1px dashed var(--border);display:flex;gap:8px}
.price-feats li::before{content:"\2713";color:var(--success);flex:none}
.price-feats li.no::before{content:"\2014";color:var(--muted-2)}
.price-feats li.no{color:var(--muted-2)}
.price-card .btn{margin-top:auto}
.price-custom{background:var(--surface-2);border:1px dashed var(--border-strong);border-radius:var(--radius);padding:28px;margin-top:24px;display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap}
.price-custom h3{font-size:18px;margin-bottom:6px}
.price-custom p{font-size:13.5px;color:var(--muted);max-width:640px}
/* faq */
.faq-list{max-width:860px;margin:40px auto 0}
.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);margin-bottom:14px;overflow:hidden}
.faq-item summary{list-style:none;cursor:pointer;padding:18px 22px;font-size:15.5px;font-weight:600;color:var(--text);display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:20px;color:var(--accent);flex:none;transition:transform .25s var(--ease)}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-answer{padding:0 22px 20px;font-size:14px;color:var(--muted);line-height:1.8}
.faq-answer code{font-family:var(--font-mono);font-size:12.5px;background:var(--surface-2);padding:2px 6px;border-radius:6px;color:var(--accent)}
.faq-cat{font-size:12px;color:var(--muted-2);font-family:var(--font-mono);letter-spacing:.4px;margin-right:8px;flex:none}
/* compliance */
.cert-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin-top:36px}
.cert-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px}
.cert-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}
.cert-card h3{font-size:16px}
.cert-status{font-size:11.5px;padding:4px 10px;border-radius:999px;font-weight:600}
.cert-status.pending{background:rgba(245,158,11,.12);color:#F59E0B;border:1px solid rgba(245,158,11,.3)}
.cert-status.done{background:rgba(52,211,153,.1);color:var(--success);border:1px solid rgba(52,211,153,.3)}
.cert-card p{font-size:13px;color:var(--muted);line-height:1.7}
.shield-item{display:flex;gap:14px;padding:18px 0;border-bottom:1px solid var(--border);align-items:flex-start}
.shield-item:last-child{border-bottom:none}
.shield-ic{width:38px;height:38px;border-radius:10px;background:var(--accent-dim);color:var(--accent);display:flex;align-items:center;justify-content:center;font-size:18px;flex:none}
.shield-item h4{font-size:15px;margin-bottom:4px}
.shield-item p{font-size:13.5px;color:var(--muted)}
/* careers */
.jobs-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px;margin-top:36px}
.job-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:transform .25s var(--ease),border-color .25s}
.job-card:hover{transform:translateY(-3px);border-color:var(--border-strong)}
.job-card h3{font-size:17px;margin-bottom:6px}
.job-meta{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0 14px}
.job-meta span{font-size:12px;color:var(--muted-2);font-family:var(--font-mono);padding:4px 10px;border:1px solid var(--border);border-radius:999px}
.job-card p{font-size:13.5px;color:var(--muted);line-height:1.7;margin-bottom:14px}
.job-tags{display:flex;flex-wrap:wrap;gap:6px}
.job-tags span{font-size:12px;color:var(--accent);background:var(--accent-dim);padding:3px 10px;border-radius:6px}
.culture-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin-top:36px}
.apply-box{background:var(--surface-2);border:1px dashed var(--border-strong);border-radius:var(--radius);padding:28px;margin-top:40px;text-align:center}
.apply-box code{font-family:var(--font-mono);color:var(--accent);background:rgba(56,189,248,.08);padding:4px 10px;border-radius:6px}
/* docs api */
.api-layout{display:grid;grid-template-columns:240px 1fr;gap:40px;margin-top:40px}
.api-nav{position:sticky;top:100px;align-self:start;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px}
.api-nav a{display:block;padding:8px 12px;font-size:13.5px;color:var(--muted);border-radius:8px;margin:2px 0;transition:background .2s,color .2s}
.api-nav a:hover{color:var(--text);background:var(--surface-2)}
.api-section{margin-bottom:52px;scroll-margin-top:100px}
.api-section h3{font-size:22px;margin-bottom:8px}
.api-section .sec-sub{margin-bottom:18px}
.endpoint{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:20px;margin-bottom:14px}
.endpoint-line{display:flex;align-items:center;gap:12px;font-family:var(--font-mono);font-size:14px;margin-bottom:10px}
.method{flex:none;font-size:11.5px;font-weight:700;padding:4px 10px;border-radius:6px;letter-spacing:.6px}
.method.get{background:rgba(52,211,153,.12);color:var(--success)}
.method.post{background:rgba(56,189,248,.12);color:var(--accent)}
.method.put{background:rgba(245,158,11,.12);color:#F59E0B}
.method.delete{background:rgba(244,63,94,.12);color:var(--danger)}
.endpoint-path{color:var(--text);font-weight:600}
.endpoint-auth{font-size:12px;color:var(--muted-2);font-family:var(--font-mono);margin-bottom:10px}
.endpoint p{font-size:13.5px;color:var(--muted);line-height:1.7}
.code-block{background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius-sm);padding:18px;overflow-x:auto;margin:12px 0}
.code-block pre{font-family:var(--font-mono);font-size:13px;line-height:1.7;color:var(--text)}
.param-table td:first-child{font-family:var(--font-mono);font-size:12.5px;color:var(--accent);white-space:nowrap}
.required{color:var(--danger);font-size:11px}
.optional{color:var(--muted-2);font-size:11px}
.status-row{font-family:var(--font-mono);font-size:12.5px}
@media (max-width:900px){
  .api-layout{grid-template-columns:1fr}
  .api-nav{position:static;margin-bottom:24px}
  .case-metrics{grid-template-columns:repeat(3,1fr)}
  .price-grid{grid-template-columns:1fr}
}

/* ---- IP 情报查询页 ---- */
.ip-box{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;margin-bottom:24px}
.ip-search{display:flex;gap:12px;flex-wrap:wrap}
.ip-search input{flex:1;min-width:260px;background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);padding:12px 16px;font-size:15px;font-family:var(--font-mono)}
.ip-search input:focus{outline:none;border-color:var(--accent)}
.ip-search .btn{padding:12px 28px;font-size:14px;white-space:nowrap}
.ip-hint{font-size:12px;color:var(--muted-2);margin-top:12px}
.ip-error{background:rgba(220,53,69,.12);border:1px solid rgba(220,53,69,.4);color:#ff8f95;border-radius:var(--radius-sm);padding:12px 16px;font-size:13.5px;margin-top:14px}
.ip-result-head{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin:22px 0 18px}
.ip-addr{font-family:var(--font-mono);font-size:20px;font-weight:700;color:var(--text);word-break:break-all}
.ip-badge{display:inline-block;padding:6px 14px;border-radius:999px;font-size:12.5px;font-weight:600;letter-spacing:.3px}
.b-type-dc{background:rgba(102,126,255,.15);color:#8fa2ff;border:1px solid rgba(102,126,255,.45)}
.b-type-school{background:rgba(56,189,248,.14);color:#5ec7f7;border:1px solid rgba(56,189,248,.45)}
.b-type-broadband{background:rgba(52,211,153,.14);color:#4fd1a5;border:1px solid rgba(52,211,153,.45)}
.b-type-other{background:rgba(163,163,163,.14);color:#c6c6c6;border:1px solid rgba(163,163,163,.45)}
.ip-meta{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}
.ip-meta-item{background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius-sm);padding:12px 14px}
.ip-meta-item span{display:block;font-size:11.5px;color:var(--muted-2);margin-bottom:5px}
.ip-meta-item b{font-size:14px;color:var(--text);font-weight:600;word-break:break-all}
.ip-map-box{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
#ipmap{width:100%;height:440px;background:#0b1020;z-index:1}
#ipmap .leaflet-control-attribution{font-size:10px;color:#555}
@media (max-width:900px){
  #ipmap{height:340px}
}

/* ---- 工具箱页 ---- */
.tool-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px}
.tool-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px;display:flex;gap:18px;align-items:flex-start;transition:border-color .25s,transform .25s}
.tool-card:hover{border-color:var(--accent);transform:translateY(-3px)}
.tool-icon{flex-shrink:0;width:52px;height:52px;border-radius:14px;background:rgba(102,126,255,.12);border:1px solid rgba(102,126,255,.35);display:flex;align-items:center;justify-content:center;color:var(--accent)}
.tool-icon svg{width:26px;height:26px}
.tool-info{flex:1;min-width:0}
.tool-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:8px}
.tool-head h3{font-size:17px;color:var(--text);margin:0}
.tool-badge{font-size:11px;font-weight:600;padding:3px 10px;border-radius:999px;background:rgba(52,211,153,.14);color:#4fd1a5;border:1px solid rgba(52,211,153,.4)}
.tool-badge-soon{background:rgba(163,163,163,.12);color:var(--muted-2);border-color:rgba(163,163,163,.35)}
.tool-card p{font-size:13.5px;color:var(--muted);line-height:1.7;margin:0 0 16px}
.tool-soon{opacity:.78}
.tool-soon-tip{font-size:12px;color:var(--muted-2)}
.btn-sm{padding:9px 20px;font-size:13px}

/* ---- 首页工具箱 CTA ---- */
.toolkit-cta{background:linear-gradient(135deg,#101735 0%,#1a1140 55%,#0c1f3a 100%);border-top:1px solid rgba(255,255,255,.06);border-bottom:1px solid rgba(255,255,255,.06);padding:54px 0;position:relative;overflow:hidden}
.toolkit-cta::before{content:"";position:absolute;inset:0;background:radial-gradient(600px 220px at 20% 20%,rgba(102,126,255,.16),transparent 70%);pointer-events:none}
.toolkit-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;position:relative}
.toolkit-text h2{font-size:30px;color:var(--text);margin:8px 0 6px}
.toolkit-text p{font-size:14.5px;color:var(--muted);margin:0}
.toolkit-inner .btn{font-size:15px;padding:14px 34px}
@media (max-width:900px){
  .toolkit-inner{flex-direction:column;align-items:flex-start}
}


/* ---- Port check ---- */
.port-table-wrap{overflow-x:auto;margin-top:18px}
.port-table{width:100%;border-collapse:collapse;font-size:13.5px}
.port-table th{font-size:12px;color:var(--muted-2);text-align:left;padding:8px 12px;border-bottom:1px solid var(--border);font-weight:600}
.port-table td{padding:9px 12px;border-bottom:1px solid rgba(255,255,255,.05);color:var(--text)}
.port-table td code{background:rgba(102,126,255,.12);border:1px solid rgba(102,126,255,.3);padding:2px 8px;border-radius:6px;font-size:12.5px}
.port-badge{display:inline-block;font-size:11.5px;font-weight:600;padding:3px 10px;border-radius:999px;min-width:52px;text-align:center}
.p-open{background:rgba(52,211,153,.14);color:#4fd1a5;border:1px solid rgba(52,211,153,.4)}
.p-closed{background:rgba(163,163,163,.1);color:var(--muted-2);border:1px solid rgba(163,163,163,.3)}

/* 错误页大号错误码 */
.err-code{font-size:clamp(80px,14vw,150px);font-weight:900;line-height:1;letter-spacing:-4px;background:linear-gradient(92deg,var(--accent) 10%,var(--accent-2) 55%,#93C5FD 90%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:10px}
.page-hero .center{text-align:center}
.page-hero .center .lead{margin:0 auto}


/* ===== prefers-color-scheme: dark 深色适配 ===== */
@media (prefers-color-scheme: dark){
  :root{
    --bg:#05080F;
    --bg-soft:#091020;
    --surface:#0C1526;
    --surface-2:#0F1C33;
    --border:rgba(148,163,184,0.16);
    --border-strong:rgba(148,163,184,0.30);
    --text:#E6EDF7;
    --muted:#8CA3C3;
    --muted-2:#5B7094;
  }
  body{background:var(--bg);color:var(--text)}
  .nav{background:rgba(5,8,15,.80)}
  .nav.scrolled{background:rgba(5,8,15,.94)}
  .mobile-menu{background:rgba(5,8,15,.99)}
  .terminal{background:rgba(8,13,26,.88);box-shadow:0 24px 80px rgba(0,0,0,.6)}
  .btn-ghost{background:rgba(12,21,38,.55)}
  .hero .btn-primary{color:#04101F}
  .form input,.form textarea,.ip-search input{background:var(--bg-soft);color:var(--text)}
  .prod-card,.cap-card,.stat-card,.feat-card,.step,.article,.contact-card,.form,
  .member-card,.partner-card,.coop-card,.doc-card,.case-card,.price-card,.faq-item,
  .job-card,.cert-card,.tool-card,.ip-box,.ip-map-box,.endpoint,.code-block,.api-nav,
  .post-card,.article-nav a{background:var(--surface)}
  .prod-card{background:linear-gradient(180deg,var(--surface),rgba(15,26,46,.35))}
  .member-card{background:linear-gradient(180deg,var(--surface),rgba(15,26,46,.35))}
  footer{border-top-color:var(--border)}
  .term-body{color:var(--muted)}
}
.toolkit-btns{display:flex;gap:12px;flex-wrap:wrap}@media(max-width:640px){.toolkit-btns{flex-direction:column}}