/* 头脑风暴 BRAINSTORM —— 视觉规范取自 aihot.news 的暗色时间线风格（单列版） */
:root {
  --bg-0: #13191c;
  --surface-card: #1a2226;
  --surface-card-hover: #1d272b;
  --surface-elevated: #202a2f;
  --text-0: #e8ebf2;
  --text-soft: #d2dada;
  --text-mid: rgba(232, 235, 242, 0.55);
  --text-dim: rgba(232, 235, 242, 0.35);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.12);
  --brand-teal: #176b75;
  --cyan-a: #5deef0;
  --cyan-b: #078ea9;
  --accent: #45dbe4;
  --amber: #d3b26a;
  --rose: #d86a52;
  --emerald: #5fc79a;
  --purple: #ab9df2;
  --rank-rest: #7b869a;
  --note-fg: #8fb8a8;
  --radius: 12px;
  --radius-sm: 8px;
  --mono: "SF Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg-0);
  color: var(--text-0);
  font: 14px/1.7 -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
a { color: inherit; text-decoration: none; }
.mono { font-family: var(--mono); }

/* ---------- 主栏 ---------- */
.feed { max-width: 768px; margin: 0 auto; padding: 36px 24px 64px; }
@media (max-width: 640px) { .feed { padding: 24px 14px 50px; } }

.feed-head h1 { font-size: 23px; margin: 0 0 6px; letter-spacing: 0.01em; }

/* 板块切换 */
.tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.tab {
  padding: 5px 16px; border-radius: 999px; border: 1px solid var(--border);
  background: transparent; color: var(--text-mid); font-size: 13px; cursor: pointer;
}
.tab:hover { border-color: var(--border-strong); color: var(--text-soft); }
.tab.active {
  border-color: transparent; color: #04262b; font-weight: 650;
  background: linear-gradient(135deg, var(--cyan-a), var(--cyan-b));
}

/* 前沿关注卡片区块 */

/* 按月归档 */
.archive-page { display: flex; flex-direction: column; gap: 22px; }
.month-label {
  font-size: 14px; font-weight: 650; color: var(--cyan-a);
  padding-bottom: 8px; margin-bottom: 10px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 10px;
}
.month-cnt { font-family: var(--mono); font-size: 11px; font-weight: 400; color: var(--text-dim); }
.arc-group { margin-bottom: 28px; }
.arc-head {
  font-size: 15px; font-weight: 700; color: var(--text-0);
  margin-bottom: 14px; display: flex; align-items: center; gap: 10px;
}
.arc-head::before { content: ""; width: 4px; height: 16px; border-radius: 2px; background: linear-gradient(135deg, var(--cyan-a), var(--cyan-b)); }
.month-days { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 8px; }
.day-card {
  display: flex; flex-direction: column; gap: 2px; align-items: flex-start;
  padding: 10px 12px; border-radius: var(--radius-sm);
  background: var(--surface-card); border: 1px solid var(--border);
  color: var(--text-0); font-size: 13.5px; cursor: pointer; text-align: left;
}
.day-card:hover { background: var(--surface-card-hover); border-color: var(--border-strong); }
.day-card .mono { font-family: var(--mono); font-size: 10.5px; color: var(--text-dim); }

.fr-block {
  margin-top: 11px; padding: 10px 13px;
  background: var(--surface-elevated); border-radius: var(--radius-sm);
}
.fr-label { font-size: 11px; letter-spacing: 0.1em; color: var(--accent); margin-bottom: 5px; }
.fr-body { font-size: 13px; color: var(--text-soft); line-height: 1.7; white-space: pre-wrap; }
.fr-apps { margin: 0; padding-left: 18px; font-size: 13px; color: var(--text-soft); line-height: 1.8; }

/* 站点标识 */
.brand {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 700; letter-spacing: 0.06em;
  color: var(--cyan-a); margin-bottom: 14px;
}
.brand-mark { font-size: 15px; }
.brand-en {
  font-family: var(--mono); font-size: 10.5px; font-weight: 500;
  letter-spacing: 0.18em; color: var(--text-dim);
}
.feed-meta { font-size: 12.5px; color: var(--text-mid); }
.feed-meta .dot { margin: 0 6px; color: var(--text-dim); }
.day-link {
  font-family: var(--mono); color: var(--accent); padding: 0 4px; cursor: pointer;
}
.day-link:hover { text-decoration: underline; }
.day-off { color: var(--text-dim); padding: 0 4px; }

/* ---------- 时间线 ---------- */
.timeline { position: relative; margin-top: 14px; padding-left: 28px; }
.timeline::before {
  content: ""; position: absolute; left: 9px; top: 8px; bottom: 8px; width: 2px;
  background: linear-gradient(to bottom, var(--border-strong), transparent);
}
.tl-item { position: relative; margin-bottom: 18px; }
.tl-dot {
  position: absolute; left: -24px; top: 26px;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--bg-0); border: 2px solid var(--cyan-b);
}
.tl-item.top .tl-dot {
  border-color: var(--cyan-a);
  box-shadow: 0 0 10px rgba(93, 238, 240, 0.55);
}

.card {
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px 15px;
  transition: background 0.15s, border-color 0.15s;
}
.card:hover { background: var(--surface-card-hover); border-color: var(--border-strong); }

.card-head { display: flex; align-items: center; gap: 10px; margin-bottom: 9px; }
.rank {
  font-family: var(--mono); font-size: 11px; color: var(--rank-rest);
  border: 1px solid var(--border); border-radius: 6px; padding: 1px 8px;
  flex-shrink: 0;
}
.tl-item.top .rank {
  color: #04262b; font-weight: 700; border-color: transparent;
  background: linear-gradient(135deg, var(--cyan-a), var(--cyan-b));
}
.src {
  font-size: 12px; color: var(--text-dim);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1;
}
.fun {
  font-family: var(--mono); font-size: 11.5px; padding: 2px 10px;
  border-radius: 999px; border: 1px solid; flex-shrink: 0;
}
.fun-hi  { color: var(--accent);  border-color: rgba(93, 238, 240, 0.35); background: rgba(93, 238, 240, 0.08); }
.fun-mid { color: var(--amber);   border-color: rgba(211, 178, 106, 0.35); background: rgba(211, 178, 106, 0.08); }
.fun-low { color: var(--rank-rest); border-color: var(--border); background: transparent; }

.card-title { font-size: 16.5px; font-weight: 650; line-height: 1.45; margin: 1px 0 3px; }
.angle { font-size: 12px; color: var(--accent); margin-bottom: 8px; }
.angle::before { content: "◈ "; color: var(--cyan-b); }

.tags { display: flex; gap: 6px; flex-wrap: wrap; margin: 0 0 10px; }
.tag { font-size: 11px; padding: 1px 9px; border-radius: 999px; border: 1px solid var(--border); color: var(--text-mid); }
.t-law  { color: var(--rose);    border-color: rgba(216, 106, 82, 0.4); }
.t-biz  { color: var(--amber);   border-color: rgba(211, 178, 106, 0.4); }
.t-fin  { color: var(--emerald); border-color: rgba(95, 199, 154, 0.4); }
.t-eco  { color: var(--purple);  border-color: rgba(171, 157, 242, 0.4); }
.t-ani  { color: #f2a2c0;        border-color: rgba(242, 162, 192, 0.4); }
.t-tech { color: var(--accent);  border-color: rgba(93, 238, 240, 0.4); }
.t-prod, .t-side, .t-content, .t-other { color: var(--text-mid); border-color: var(--border-strong); }

.idea { font-size: 13.8px; color: var(--text-soft); white-space: pre-wrap; }

.news-quote {
  margin-top: 12px; padding: 10px 13px;
  border-left: 3px solid var(--brand-teal);
  background: rgba(23, 107, 117, 0.13);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 12.5px; color: var(--text-mid); line-height: 1.65;
}
.news-quote .nq-src { color: var(--text-dim); font-size: 11.5px; display: block; margin-top: 3px; }
.news-quote a { color: #6fd3da; }
.news-quote a:hover { text-decoration: underline; }

.step {
  margin-top: 11px; padding: 9px 13px; border-radius: var(--radius-sm);
  font-size: 12.5px; color: var(--note-fg); background: rgba(143, 184, 168, 0.08);
}
.step b { color: var(--emerald); font-weight: 600; margin-right: 4px; }

.sum { font-size: 12.8px; color: var(--text-mid); margin-top: 8px; }

/* 领域标签 + 落地路线 + 产出/难点 */
.field-row { display: flex; align-items: center; gap: 8px; margin: 2px 0 8px; }
.field {
  font-size: 11.5px; padding: 1px 11px; border-radius: 999px; font-weight: 600;
  color: #eafcff; border: 1px solid transparent;
  background: linear-gradient(135deg, var(--brand-teal), var(--cyan-b));
}
.plan {
  margin-top: 13px; padding: 12px 15px;
  background: rgba(23, 107, 117, 0.1);
  border: 1px solid rgba(23, 107, 117, 0.35);
  border-radius: var(--radius-sm);
}
.plan-label { font-size: 11px; letter-spacing: 0.12em; color: var(--accent); margin-bottom: 8px; }
.plan ol { margin: 0; padding: 0; list-style: none; counter-reset: step; }
.plan li {
  counter-increment: step; position: relative;
  padding-left: 27px; margin-bottom: 7px;
  font-size: 13px; color: var(--text-soft); line-height: 1.65;
}
.plan li:last-child { margin-bottom: 0; }
.plan li::before {
  content: counter(step); position: absolute; left: 0; top: 3px;
  width: 18px; height: 18px; border-radius: 50%;
  display: grid; place-items: center;
  font-family: var(--mono); font-size: 10px; font-weight: 700; color: #04262b;
  background: linear-gradient(135deg, var(--cyan-a), var(--cyan-b));
}
.plan li:first-child::before { box-shadow: 0 0 9px rgba(93, 238, 240, 0.55); }
.meta-line { margin-top: 9px; font-size: 12.5px; color: var(--text-mid); }
.meta-line b { color: var(--emerald); font-weight: 600; margin-right: 6px; }
.meta-line.risk b { color: var(--amber); }

/* 评级与终审徽章 */
.grade {
  font-family: var(--mono); font-size: 10.5px; padding: 2px 8px;
  border-radius: 999px; border: 1px solid; flex-shrink: 0; cursor: help;
}
.grade.ok { color: var(--emerald); border-color: rgba(95, 199, 154, 0.45); background: rgba(95, 199, 154, 0.08); }
.grade.mid { color: var(--amber); border-color: rgba(211, 178, 106, 0.45); background: rgba(211, 178, 106, 0.08); }
.grade.warn-tag { color: var(--rose); border-color: rgba(216, 106, 82, 0.45); background: rgba(216, 106, 82, 0.1); }

.empty {
  padding: 46px 20px; text-align: center; color: var(--text-dim); font-size: 13.5px;
  border: 1px dashed var(--border-strong); border-radius: var(--radius);
}
.empty .big { font-size: 30px; display: block; margin-bottom: 10px; }
.empty code { font-family: var(--mono); color: var(--accent); }

.warn-banner {
  margin-bottom: 16px; padding: 10px 14px; border-radius: var(--radius-sm);
  background: rgba(216, 106, 82, 0.12); border: 1px solid rgba(216, 106, 82, 0.35);
  color: #e8a292; font-size: 12.5px;
}

.info-banner {
  margin-bottom: 16px; padding: 10px 14px; border-radius: var(--radius-sm);
  background: rgba(23, 107, 117, 0.15); border: 1px solid rgba(23, 107, 117, 0.4);
  color: #9fd8de; font-size: 12.5px;
}

.feed-foot { margin-top: 34px; font-size: 11.5px; color: var(--text-dim); line-height: 1.9; }
.feed-foot a { color: var(--text-mid); border-bottom: 1px dotted var(--border-strong); }
.feed-foot a:hover { color: var(--accent); }
.link-btn {
  background: none; border: none; padding: 0; font: inherit; color: var(--text-dim);
  cursor: pointer;
}
.link-btn:hover { color: var(--accent); }

/* 前沿关注卡片 */
.w-block { margin-top: 12px; }
.w-label { font-size: 11px; letter-spacing: 0.12em; color: var(--accent); margin-bottom: 5px; }
.w-text { font-size: 13.2px; color: var(--text-soft); line-height: 1.75; }
.w-list { margin: 0; padding-left: 20px; font-size: 13.2px; color: var(--text-soft); line-height: 1.75; }