/* =========================================================
   AI 创客家 · 公开活动动态页（/events，无需登录）
   黑底、细线、大字号排版；不用渐变、发光和装饰图形，信息本身就是版面。
   ========================================================= */

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
a { color: inherit; text-decoration: none; }

.ev-page {
  --bg: #000;
  --text: #f5f5f7;
  --text-2: #a1a1a6;
  --text-3: #6e6e73;
  --line: #262628;
  --line-strong: #3a3a3c;
  --live: #30d158;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-feature-settings: "tnum";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
::selection { background: rgba(255, 255, 255, 0.25); }

.ev-wrap { max-width: 1120px; margin: 0 auto; padding: 0 32px; }
.ev-label { margin: 0; color: var(--text-3); font-size: 13px; font-weight: 500; letter-spacing: 0.02em; }

/* ---------- 顶栏 ---------- */
.ev-bar { position: sticky; top: 0; z-index: 20; border-bottom: 1px solid var(--line); background: rgba(0, 0, 0, 0.78); backdrop-filter: saturate(180%) blur(20px); -webkit-backdrop-filter: saturate(180%) blur(20px); }
.ev-bar .ev-wrap { display: flex; align-items: center; justify-content: space-between; height: 56px; }
.ev-brand { display: inline-flex; align-items: center; gap: 10px; font-size: 15px; font-weight: 600; }
.ev-brand img { width: 26px; height: 26px; padding: 2px; border-radius: 6px; background: #fff; object-fit: contain; }
.ev-brand em { padding-left: 10px; border-left: 1px solid var(--line-strong); color: var(--text-2); font-style: normal; font-weight: 400; }
.ev-cta { color: var(--text); font-size: 14px; }
.ev-cta:hover { color: #fff; text-decoration: underline; text-underline-offset: 4px; }

/* ---------- 首屏 ---------- */
.ev-hero { position: relative; display: flex; align-items: flex-end; min-height: min(86vh, 860px); padding: 160px 0 72px; overflow: hidden; border-bottom: 1px solid var(--line); }
.ev-hero-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 60% 35%; }
.ev-hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, #000 0%, rgba(0, 0, 0, 0.82) 30%, rgba(0, 0, 0, 0.35) 62%, rgba(0, 0, 0, 0.15) 100%), linear-gradient(90deg, rgba(0, 0, 0, 0.55) 0%, transparent 60%); }
.ev-hero-copy { position: relative; z-index: 1; width: 100%; }
.ev-hero .ev-label { color: rgba(255, 255, 255, 0.72); }
.ev-hero .ev-now { border-top-color: rgba(255, 255, 255, 0.22); }
.ev-hero .ev-now > div + div { border-left-color: rgba(255, 255, 255, 0.22); }
.ev-hero .ev-now small { color: rgba(255, 255, 255, 0.72); }
.ev-hero h1 { margin: 20px 0 0; font-size: clamp(56px, 9vw, 120px); font-weight: 600; line-height: 1; letter-spacing: -0.045em; }
.ev-now { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 72px; border-top: 1px solid var(--line); }
.ev-now > div { padding: 22px 0 0; }
.ev-now > div + div { padding-left: 32px; border-left: 1px solid var(--line); }
.ev-now strong { display: block; margin-top: 10px; font-size: 22px; font-weight: 600; letter-spacing: -0.01em; }
.ev-now small { display: block; margin-top: 6px; color: var(--text-2); font-size: 15px; }
.ev-dot { display: inline-block; width: 7px; height: 7px; margin-right: 8px; border-radius: 50%; background: var(--live); vertical-align: 1px; }

/* ---------- 正在进行 ---------- */
.ev-live { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 48px; align-items: end; padding: 88px 0; border-bottom: 1px solid var(--line); }
.ev-live h2 { margin: 18px 0 0; font-size: clamp(36px, 5vw, 60px); font-weight: 600; line-height: 1.05; letter-spacing: -0.035em; }
.ev-live p.ev-sum { max-width: 520px; margin: 20px 0 0; color: var(--text-2); font-size: 19px; line-height: 1.55; }
.ev-live-date { min-width: 260px; text-align: right; }
.ev-live-date b { display: block; font-size: 88px; font-weight: 600; line-height: 0.9; letter-spacing: -0.05em; }
.ev-live-date small { display: block; margin-top: 14px; color: var(--text-2); font-size: 15px; }
.ev-days { display: grid; grid-auto-flow: column; gap: 4px; margin-top: 22px; }
.ev-days i { height: 2px; background: var(--line-strong); }
.ev-days i.on { background: var(--text); }

/* ---------- 日程表 ---------- */
.ev-section { padding: 88px 0; border-bottom: 1px solid var(--line); }
.ev-section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 36px; }
.ev-section-head h2 { margin: 0; font-size: 40px; font-weight: 600; letter-spacing: -0.03em; }
.ev-section-head span { color: var(--text-3); font-size: 15px; }

.ev-table { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line-strong); }
.ev-row {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr) 110px 150px;
  gap: 32px;
  align-items: baseline;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}
.ev-when b { font-size: 44px; font-weight: 600; line-height: 1; letter-spacing: -0.04em; }
.ev-when small { display: block; margin-top: 8px; color: var(--text-3); font-size: 14px; }
.ev-what h3 { margin: 0; font-size: 24px; font-weight: 600; letter-spacing: -0.02em; }
.ev-what p { margin: 8px 0 0; color: var(--text-2); font-size: 15px; line-height: 1.6; }
.ev-kind { color: var(--text-2); font-size: 15px; }
.ev-state { color: var(--text); font-size: 15px; text-align: right; white-space: nowrap; }
.ev-row.is-past { padding: 22px 0; }
.ev-row.is-past .ev-when b { font-size: 28px; color: var(--text-3); }
.ev-row.is-past h3 { color: var(--text-3); font-size: 18px; font-weight: 500; }
.ev-row.is-past .ev-kind, .ev-row.is-past .ev-state { color: var(--text-3); }
.ev-empty { margin: 0; padding: 40px 0; border-top: 1px solid var(--line-strong); color: var(--text-2); }

/* ---------- 活动现场 ---------- */
.ev-scenes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.ev-scenes figure { margin: 0; }
.ev-scenes img { display: block; width: 100%; height: auto; aspect-ratio: 4 / 3; border-radius: 14px; object-fit: cover; background: #1c1c1e; }
.ev-scenes figcaption { display: flex; justify-content: space-between; gap: 12px; margin-top: 14px; font-size: 15px; }
.ev-scenes figcaption span { color: var(--text-3); }

/* ---------- 月历 ---------- */
.ev-cal { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 64px; }
.ev-month h3 { margin: 0 0 18px; font-size: 17px; font-weight: 600; }
.ev-month ol { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 4px; margin: 0; padding: 0; list-style: none; }
.ev-month li { aspect-ratio: 1; display: flex; align-items: center; justify-content: center; border-radius: 8px; color: var(--text-3); font-size: 14px; }
.ev-month li.wk { aspect-ratio: auto; padding-bottom: 6px; font-size: 12px; }
.ev-month li.on { padding: 0; }
.ev-month li button {
  width: 100%; height: 100%; border: 0; border-radius: 8px;
  background: #1c1c1e; color: var(--text); font: inherit; font-weight: 600;
  cursor: pointer; transition: background 0.15s ease;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; padding: 4px;
}
.ev-month li button b { font-weight: 600; }
.ev-month li button small {
  max-width: 100%; color: var(--text-2); font-size: 12px; font-weight: 400; line-height: 1.2;
  overflow: hidden; white-space: nowrap; text-overflow: clip;
}
.ev-month li button:hover { background: #2c2c2e; }
.ev-month li button:focus-visible { outline: 2px solid var(--text); outline-offset: 2px; }
.ev-month li.is-past button { background: transparent; color: var(--text-2); }
.ev-month li.is-past button b { text-decoration: line-through; text-decoration-color: var(--text-3); }
.ev-month li.is-past button small { color: var(--text-3); }
.ev-month li.is-past button:hover { background: #1c1c1e; }
.ev-month li.today { box-shadow: inset 0 0 0 1.5px var(--text); border-radius: 8px; color: var(--text); }
.ev-month li.today button { box-shadow: inset 0 0 0 1.5px var(--text); }
.ev-legend { display: flex; flex-wrap: wrap; gap: 10px 24px; margin-top: 28px; color: var(--text-3); font-size: 13px; }
.ev-legend-tip { margin-left: auto; }
.ev-legend i { display: inline-block; width: 12px; height: 12px; margin-right: 8px; border-radius: 3px; background: #1c1c1e; vertical-align: -1px; }
.ev-legend i.ev-k { background: var(--k); border-radius: 50%; width: 8px; height: 8px; margin-right: 8px; vertical-align: 1px; }
.ev-legend i.t { background: transparent; box-shadow: inset 0 0 0 1.5px var(--text); }

.ev-what p.ev-place { margin-top: 6px; color: var(--text-3); font-size: 14px; }
.ev-what p.ev-signup { margin-top: 6px; color: var(--text); font-size: 14px; }
.ev-now small + small { margin-top: 2px; }

/* ---------- 日期详情弹窗 ---------- */
.ev-dialog {
  width: min(520px, calc(100vw - 32px));
  max-height: calc(100vh - 64px);
  padding: 28px;
  border: 1px solid var(--line-strong);
  border-radius: 20px;
  background: #111113;
  color: var(--text);
  overflow: auto;
}
.ev-dialog::backdrop { background: rgba(0, 0, 0, 0.6); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }
.ev-dialog-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 8px; }
.ev-dialog-head h2 { margin: 6px 0 0; font-size: 34px; font-weight: 600; letter-spacing: -0.03em; }
.ev-dialog-close { padding: 6px 12px; border: 1px solid var(--line-strong); border-radius: 999px; background: transparent; color: var(--text-2); font: inherit; font-size: 13px; cursor: pointer; }
.ev-dialog-close:hover { color: var(--text); border-color: var(--text-3); }
.ev-detail { padding: 22px 0 4px; border-top: 1px solid var(--line); margin-top: 16px; }
.ev-detail h3 { margin: 8px 0 0; font-size: 24px; font-weight: 600; letter-spacing: -0.02em; }
.ev-detail-sum { margin: 10px 0 0; color: var(--text-2); font-size: 15px; line-height: 1.6; }
.ev-detail dl { display: grid; gap: 10px; margin: 18px 0 0; }
.ev-detail dl div { display: grid; grid-template-columns: 56px minmax(0, 1fr); gap: 12px; font-size: 15px; }
.ev-detail dt { color: var(--text-3); }
.ev-detail dd { margin: 0; }

/* ---------- 页脚 ---------- */
.ev-foot .ev-wrap { display: flex; justify-content: space-between; gap: 16px; padding-top: 28px; padding-bottom: 48px; color: var(--text-3); font-size: 12px; }

.ev-cta:focus-visible, .ev-brand:focus-visible { outline: 2px solid var(--text); outline-offset: 4px; border-radius: 4px; }

@media (max-width: 900px) {
  .ev-row { grid-template-columns: 140px minmax(0, 1fr); gap: 12px 24px; }
  .ev-kind { grid-column: 2; }
  .ev-state { grid-column: 2; text-align: left; }
  .ev-live { grid-template-columns: 1fr; gap: 40px; }
  .ev-live-date { text-align: left; }
}

@media (max-width: 600px) {
  .ev-wrap { padding: 0 20px; }
  .ev-brand em { display: none; }
  .ev-hero { min-height: 640px; padding: 120px 0 40px; }
  .ev-hero-img { object-position: 62% 30%; }
  .ev-scenes { grid-template-columns: 1fr; gap: 28px; }
  .ev-now { grid-template-columns: 1fr; margin-top: 48px; }
  .ev-now > div + div { margin-top: 22px; padding-left: 0; border-left: 0; border-top: 1px solid var(--line); }
  .ev-live, .ev-section { padding: 56px 0; }
  .ev-live p.ev-sum { font-size: 17px; }
  .ev-live-date b { font-size: 64px; }
  .ev-section-head h2 { font-size: 30px; }
  .ev-row { grid-template-columns: 1fr; gap: 6px; padding: 24px 0; }
  .ev-kind, .ev-state { grid-column: 1; }
  .ev-what { margin-top: 10px; }
  .ev-when b { font-size: 36px; }
  .ev-when small { display: inline; margin-left: 10px; }
  .ev-kind { display: none; }
  .ev-state { margin-top: 6px; }
  .ev-cal { grid-template-columns: 1fr; gap: 40px; }
  .ev-month li button { gap: 2px; padding: 0; }
  .ev-month li button small { font-size: 10px; letter-spacing: -0.04em; }
  .ev-foot .ev-wrap { flex-direction: column; gap: 4px; }
}
@media (max-width: 380px) {
  .ev-month li button small { font-size: 9px; }
}

/* 活动类型标记：每种活动一个低饱和颜色 */
.k-expo { --k: #c9a46a; }
.k-weekend { --k: #7fae8c; }
.k-hack { --k: #d9785f; }
.k-demo { --k: #7c9fd0; }
.k-camp { --k: #a991d4; }
.k-other { --k: #8e8e93; }
.ev-k { display: inline-block; width: 7px; height: 7px; margin-right: 8px; border-radius: 50%; background: var(--k); vertical-align: 2px; }
.ev-month li.on button { position: relative; overflow: hidden; }
.ev-month li.on button::before { content: ""; position: absolute; top: 7px; right: 7px; width: 7px; height: 7px; border-radius: 50%; background: var(--k); }
.ev-month li.is-past button::before { opacity: 0.45; }
.ev-row.is-past .ev-k { opacity: 0.45; }
@media (max-width: 720px) {
  .ev-month li.on button::before { top: 5px; right: 5px; width: 6px; height: 6px; }
  .ev-legend-tip { margin-left: 0; width: 100%; }
}