/* 频道页共用（Hello Hackathon / Demo Day / 智能体） */

.ch-hero {
  background: linear-gradient(160deg, #0b1f24 0%, #0e3a3a 60%, #0aa6a0 150%);
  color: #fff; padding: 64px 0 56px; position: relative; overflow: hidden;
}
.ch-hero::after {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(800px 380px at 80% 10%, rgba(77, 208, 200, .2), transparent 60%);
}
.ch-hero .wrap { position: relative; z-index: 1; }
.ch-hero .kicker { font-size: 13px; opacity: .65; letter-spacing: .5px; }
.ch-hero h1 { font-size: 38px; margin: 8px 0 14px; letter-spacing: -.5px; }
.ch-hero p { color: rgba(255, 255, 255, .78); font-size: 16px; max-width: 620px; }

.ev {
  display: grid; grid-template-columns: 130px 1fr auto; gap: 20px; align-items: center;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px; transition: .18s;
}
.ev:hover { border-color: var(--brand); box-shadow: var(--shadow); }
.ev .when {
  background: var(--bg-2); border-radius: 10px; padding: 14px 10px; text-align: center;
}
.ev .when b { display: block; font-size: 17px; }
.ev .when small { color: var(--ink-3); font-size: 12px; }
.ev .what h3 { font-size: 17px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.ev .what p { color: var(--ink-2); font-size: 14px; margin-top: 5px; }
.ev-link { cursor: pointer; }
.ev-go { color: var(--brand); font-size: 14px; font-weight: 600; white-space: nowrap; align-self: center; }
.ev-link:hover .ev-go { text-decoration: underline; }

.agent-card { display: flex; flex-direction: column; height: 100%; }
.agent-card .ico {
  width: 42px; height: 42px; border-radius: 10px; display: grid; place-items: center;
  background: var(--brand-light); color: var(--brand-dark); font-size: 19px; margin-bottom: 12px;
}
.agent-card .by { color: var(--ink-3); font-size: 13px; margin-top: 2px; }
.agent-card .desc { color: var(--ink-2); font-size: 14px; margin-top: 10px; flex: 1; }

@media (max-width: 860px) {
  .ch-hero h1 { font-size: 28px; }
  .ev { grid-template-columns: 1fr; }
}