/* ============ AWKH Agent — Showcase ============ */
:root{
  --bg:#ffffff;
  --bg-soft:#f6f7fb;
  --bg-deep:#0b1220;
  --ink:#0b1220;
  --ink-2:#27303f;
  --muted:#5b6472;
  --line:#e7e9f0;
  --brand:#4f46e5;
  --brand-2:#6366f1;
  --brand-ink:#4338ca;
  --ok:#16a34a;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 1px 2px rgba(16,24,40,.04),0 12px 32px rgba(16,24,40,.08);
  --shadow-lg:0 24px 60px rgba(16,24,40,.16);
  --maxw:1200px;
  --agent-primary:#0ea5e9;
  --agent-accent:#22d3ee;
  --font:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);
  line-height:1.6;-webkit-font-smoothing:antialiased;font-size:16px;
}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.btn{
  display:inline-flex;align-items:center;gap:8px;justify-content:center;
  padding:11px 20px;border-radius:999px;font-weight:600;font-size:15px;
  border:1px solid transparent;cursor:pointer;transition:.18s ease;white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(79,70,229,.28)}
.btn-primary:hover{background:var(--brand-ink);transform:translateY(-1px)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-ink)}
.btn-soft{background:rgba(79,70,229,.10);color:var(--brand-ink);border-color:transparent}
.btn-soft:hover{background:rgba(79,70,229,.16)}

/* ---------- Nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.82);
  backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:14px 24px;display:flex;
  align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:700;letter-spacing:-.02em}
.brand strong{color:var(--brand-ink)}
.brand svg{width:30px;height:30px;border-radius:9px}
.nav-links{display:flex;align-items:center;gap:8px}
.nav-links a:not(.btn){color:var(--muted);font-weight:500;padding:8px 12px;border-radius:10px;font-size:15px}
.nav-links a:not(.btn):hover{color:var(--ink);background:var(--bg-soft)}
.lang-switch{display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:999px;overflow:hidden;background:#fff}
.lang-switch button{border:none;background:#fff;color:var(--muted);font-weight:600;font-size:13px;padding:7px 12px;cursor:pointer;transition:.15s;line-height:1}
.lang-switch button.active{background:var(--brand);color:#fff}
.lang-switch button:not(.active):hover{color:var(--brand-ink);background:rgba(79,70,229,.06)}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:72px 0 56px}
.hero-bg{position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(60% 60% at 12% 0%,rgba(99,102,241,.12),transparent 60%),
    radial-gradient(50% 50% at 95% 10%,rgba(34,211,238,.12),transparent 60%),
    linear-gradient(180deg,#fff,#f6f7fb)}
.hero-inner{position:relative;z-index:1;max-width:var(--maxw);margin:0 auto;padding:0 24px;
  display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.04em;
  color:var(--brand-ink);background:rgba(79,70,229,.10);padding:6px 12px;border-radius:999px}
.hero h1{font-size:clamp(34px,4.4vw,56px);line-height:1.05;letter-spacing:-.03em;
  margin:18px 0 16px;font-weight:800}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,var(--brand),#22d3ee);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:18px;color:var(--muted);max-width:520px;margin:0 0 26px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-trust{list-style:none;padding:0;margin:26px 0 0;display:flex;flex-wrap:wrap;gap:18px}
.hero-trust li{display:flex;align-items:center;gap:8px;color:var(--ink-2);font-weight:500;font-size:14px}
.hero-trust li::before{content:"";width:18px;height:18px;border-radius:50%;
  background:#e9f9ef url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2316a34a' stroke-width='3'%3E%3Cpath d='M5 13l4 4L19 7'/%3E%3C/svg%3E") center/12px no-repeat}

/* ---------- Hero window / chat ---------- */
.hero-window{position:relative}
.demo-tabs{display:flex;gap:8px;margin-bottom:14px;flex-wrap:wrap}
.demo-tab{flex:1;min-width:0;padding:10px 12px;border:1px solid var(--line);background:#fff;
  border-radius:14px;cursor:pointer;text-align:left;transition:.18s;display:flex;align-items:center;gap:8px}
.demo-tab .dt-av{font-size:18px}
.demo-tab .dt-name{font-weight:600;font-size:13px;line-height:1.15}
.demo-tab .dt-sub{font-size:11px;color:var(--muted)}
.demo-tab.active{border-color:var(--agent-primary);box-shadow:0 0 0 3px rgba(79,70,229,.12)}
.chat{background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow-lg);
  overflow:hidden;display:flex;flex-direction:column;height:560px}
.chat-head{display:flex;align-items:center;gap:12px;padding:14px 16px;border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,#fff,#fbfbff)}
.chat-avatar{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;font-size:22px;
  background:color-mix(in srgb,var(--agent-primary) 16%,#fff);border:1px solid color-mix(in srgb,var(--agent-primary) 30%,#fff)}
.chat-name{font-weight:700;font-size:15px}
.chat-status{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:6px}
.chat-status .dot{width:8px;height:8px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 3px rgba(22,163,74,.15)}
.chat-lead{margin-left:auto;border:1px solid var(--line);background:#fff;color:var(--brand-ink);
  font-weight:600;font-size:13px;padding:8px 14px;border-radius:999px;cursor:pointer;transition:.15s}
.chat-lead:hover{border-color:var(--brand);background:rgba(79,70,229,.06)}
.chat-body{flex:1;overflow-y:auto;padding:18px 16px;display:flex;flex-direction:column;gap:14px;background:var(--bg-soft)}
.msg{max-width:88%;display:flex;gap:10px;align-items:flex-start}
.msg.user{margin-left:auto;flex-direction:row-reverse}
.bubble{padding:11px 14px;border-radius:14px;font-size:14.5px;line-height:1.55;word-wrap:break-word}
.msg.bot .bubble{background:#fff;border:1px solid var(--line);border-top-left-radius:4px}
.msg.user .bubble{background:var(--agent-primary);color:#fff;border-top-right-radius:4px}
.bubble h1,.bubble h2,.bubble h3{margin:.4em 0 .3em;font-size:1.02em;font-weight:700}
.bubble p{margin:.4em 0}
.bubble ul,.bubble ol{margin:.3em 0 .3em 1.1em;padding:0}
.bubble code{background:rgba(79,70,229,.10);padding:1px 5px;border-radius:6px;font-size:.92em}
.bubble pre{background:#0b1220;color:#e6e8f0;padding:10px;border-radius:10px;overflow:auto}
.bubble pre code{background:none;color:inherit;padding:0}
.msg .av{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;font-size:16px;
  background:color-mix(in srgb,var(--agent-primary) 14%,#fff);border:1px solid color-mix(in srgb,var(--agent-primary) 26%,#fff);flex:none}
.msg.user .av{background:#eef0f6;border-color:#e2e5ee;font-size:14px}
.cite{color:var(--agent-primary);font-weight:700;cursor:pointer;font-size:.82em;vertical-align:super;
  padding:0 1px;text-decoration:underline}
.src-toggle{margin-top:8px;font-size:12.5px;color:var(--agent-primary);cursor:pointer;font-weight:600;display:inline-flex;align-items:center;gap:6px}
.src-panel{margin-top:8px;border:1px solid var(--line);border-radius:12px;background:#fbfbfe;overflow:hidden}
.src-item{padding:9px 12px;border-bottom:1px solid var(--line);font-size:12.5px;cursor:pointer}
.src-item:last-child{border-bottom:none}
.src-item:hover{background:rgba(79,70,229,.05)}
.src-item .si-top{display:flex;justify-content:space-between;gap:10px;font-weight:600;color:var(--ink-2)}
.src-item .si-score{color:var(--muted);font-weight:500}
.src-item .si-snip{color:var(--muted);margin-top:3px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.evi-panel{margin-top:8px;border:1px dashed var(--line);border-radius:12px;padding:10px 12px;background:#fff;font-size:12px;color:var(--muted)}
.evi-steps{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}
.evi-step{background:var(--bg-soft);border-radius:999px;padding:3px 10px;font-size:11px;color:var(--muted)}
.evi-step.active{background:var(--agent-primary);color:#fff}
.evi-step.done{background:rgba(22,163,74,.14);color:#15803d}
.typing{display:inline-flex;gap:4px;padding:6px 2px}
.typing span{width:7px;height:7px;border-radius:50%;background:var(--muted);opacity:.5;animation:blink 1.2s infinite}
.typing span:nth-child(2){animation-delay:.2s}.typing span:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,60%,100%{opacity:.3}30%{opacity:1}}
.chat-suggest{display:flex;gap:8px;flex-wrap:wrap;padding:10px 14px 2px;background:#fff;border-top:1px solid var(--line)}
.sug{font-size:12.5px;border:1px solid var(--line);border-radius:999px;padding:7px 12px;cursor:pointer;
  color:var(--ink-2);background:#fff;transition:.15s}
.sug:hover{border-color:var(--agent-primary);color:var(--agent-primary);background:rgba(14,165,233,.05)}
.chat-input{display:flex;gap:8px;padding:12px 14px;background:#fff;border-top:1px solid var(--line)}
.chat-input input{flex:1;border:1px solid var(--line);border-radius:12px;padding:11px 14px;font-size:14.5px;
  font-family:inherit;outline:none;transition:.15s}
.chat-input input:focus{border-color:var(--agent-primary);box-shadow:0 0 0 3px rgba(14,165,233,.12)}
.chat-input button{background:var(--agent-primary);color:#fff;border:none;border-radius:12px;padding:0 18px;
  font-weight:600;cursor:pointer;transition:.15s}
.chat-input button:hover{filter:brightness(1.06)}
.chat-input button:disabled{opacity:.5;cursor:default}

/* ---------- Sections ---------- */
.section{padding:72px 0;border-top:1px solid var(--line)}
.section.soft{background:var(--bg-soft)}
.sec-head{max-width:720px;margin:0 auto 40px;text-align:center}
.sec-tag{font-size:13px;font-weight:700;letter-spacing:.06em;color:var(--brand-ink);text-transform:uppercase}
.sec-head h2{font-size:clamp(26px,3.2vw,38px);letter-spacing:-.02em;margin:10px 0 12px;font-weight:800}
.sec-head p{color:var(--muted);font-size:17px;margin:0}

.demo-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.demo-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:.2s;cursor:pointer}
.demo-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:color-mix(in srgb,var(--agent-primary) 40%,#fff)}
.demo-card .dc-top{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.demo-card .dc-av{width:46px;height:46px;border-radius:13px;display:grid;place-items:center;font-size:24px;
  background:color-mix(in srgb,var(--agent-primary) 14%,#fff);border:1px solid color-mix(in srgb,var(--agent-primary) 26%,#fff)}
.demo-card h3{margin:0;font-size:18px;font-weight:700}
.demo-card .dc-role{font-size:13px;color:var(--muted)}
.demo-card p{color:var(--muted);font-size:14.5px;margin:8px 0 14px}
.demo-card .dc-go{font-weight:600;color:var(--agent-primary);font-size:14px}

.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.feature{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;transition:.2s}
.feature:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.feature .fi{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;font-size:22px;
  background:rgba(79,70,229,.10);margin-bottom:14px}
.feature h3{margin:0 0 6px;font-size:17px;font-weight:700}
.feature p{margin:0;color:var(--muted);font-size:14.5px}

.sec-grid-2{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.sec-grid-2 h2{font-size:clamp(24px,3vw,34px);letter-spacing:-.02em;margin:8px 0 14px;font-weight:800}
.sec-grid-2 p{color:var(--muted);font-size:16.5px}
.checklist{list-style:none;padding:0;margin:22px 0 0;display:grid;gap:14px}
.checklist li{display:flex;gap:12px;align-items:flex-start}
.checklist .ck{width:24px;height:24px;border-radius:8px;background:rgba(22,163,74,.12);color:var(--ok);
  display:grid;place-items:center;flex:none;font-size:14px;font-weight:700}
.checklist b{display:block;font-weight:700}
.checklist span{color:var(--muted);font-size:14.5px}
.codecard{background:var(--bg-deep);color:#e6e8f0;border-radius:var(--radius);padding:22px;font-size:13.5px;
  font-family:"SF Mono",ui-monospace,Menlo,Consolas,monospace;box-shadow:var(--shadow-lg);overflow:auto}
.codecard .c-key{color:#7dd3fc}.codecard .c-str{color:#86efac}.codecard .c-com{color:#64748b}
.codecard pre{margin:0;white-space:pre-wrap}

/* ---------- Build form ---------- */
.build{background:linear-gradient(180deg,#0b1220,#111a2e);color:#e6e8f0}
.build .sec-head h2{color:#fff}.build .sec-head p{color:#aab3c5}
.build-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.build-form{display:grid;gap:14px}
.field label{display:block;font-size:13px;font-weight:600;color:#cbd5e1;margin-bottom:6px}
.field input,.field textarea,.field select{width:100%;background:#0f1830;border:1px solid #243049;border-radius:12px;
  padding:11px 14px;color:#e6e8f0;font-family:inherit;font-size:14.5px;outline:none;transition:.15s}
.field input:focus,.field textarea:focus,.field select:focus{border-color:#6366f1;box-shadow:0 0 0 3px rgba(99,102,241,.25)}
.field textarea{resize:vertical;min-height:90px}
.build-form .btn-primary{justify-self:start;background:#6366f1}
.build-aside{background:rgba(255,255,255,.04);border:1px solid #243049;border-radius:var(--radius);padding:24px}
.build-aside h3{margin:0 0 10px;color:#fff;font-size:18px}
.build-aside ul{margin:0;padding-left:18px;color:#aab3c5;font-size:14.5px;display:grid;gap:8px}
.build-note{font-size:12.5px;color:#8b95a7;margin-top:12px}

/* ---------- Footer ---------- */
.footer{background:var(--bg-deep);color:#aab3c5;padding:48px 0 30px}
.footer-inner{max-width:var(--maxw);margin:0 auto;padding:0 24px;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
.footer .brand{color:#fff;margin-bottom:12px}
.footer p{font-size:14px;max-width:300px}
.footer h4{color:#fff;font-size:14px;margin:0 0 12px}
.footer a{display:block;color:#aab3c5;font-size:14px;padding:4px 0}
.footer a:hover{color:#fff}
.footer-bottom{max-width:var(--maxw);margin:30px auto 0;padding:18px 24px 0;border-top:1px solid #1d294200;border-top:1px solid rgba(255,255,255,.08);
  font-size:13px;color:#6b7589;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* ---------- Modal ---------- */
.modal{position:fixed;inset:0;z-index:100;display:none;align-items:center;justify-content:center;padding:20px;
  background:rgba(11,18,32,.55);backdrop-filter:blur(4px)}
.modal.open{display:flex}
.modal-card{background:#fff;border-radius:20px;box-shadow:var(--shadow-lg);width:min(480px,100%);padding:26px}
.modal-card h3{margin:0 0 4px;font-size:20px;font-weight:800}
.modal-card p.sub{margin:0 0 18px;color:var(--muted);font-size:14px}
.modal .field{margin-bottom:12px}
.modal .btn-primary{width:100%;margin-top:6px}
.modal-close{position:absolute;top:16px;right:18px;background:none;border:none;font-size:22px;color:var(--muted);cursor:pointer}

/* ---------- toast ---------- */
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);
  background:#0b1220;color:#fff;padding:12px 20px;border-radius:12px;font-size:14px;font-weight:500;
  box-shadow:var(--shadow-lg);opacity:0;transition:.25s;z-index:200;pointer-events:none}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- Responsive ---------- */
@media (max-width:980px){
  .hero-inner{grid-template-columns:1fr;gap:36px}
  .hero{padding:48px 0 40px}
  .demo-cards,.feature-grid,.build-grid,.footer-inner{grid-template-columns:1fr 1fr}
  .sec-grid-2{grid-template-columns:1fr;gap:28px}
}
@media (max-width:680px){
  .nav-links a:not(.btn){display:none}
  .demo-cards,.feature-grid,.build-grid,.footer-inner{grid-template-columns:1fr}
  .chat{height:520px}
  .wrap{padding:0 18px}
  .hero-trust{gap:10px}
}