/* ============ 全局变量与基础 ============ */
:root{
  --bg:#0b1120;
  --bg-2:#111a2e;
  --panel:#15203a;
  --panel-2:#1b294a;
  --line:#283460;
  --text:#e6ecff;
  --text-dim:#9aa6cc;
  --text-mute:#6b779e;
  --accent:#5b8cff;
  --accent-2:#7c3aed;
  --shadow:0 8px 24px rgba(0,0,0,.45);

  --c-news:#3b82f6;
  --c-update:#10b981;
  --c-event:#f59e0b;
  --c-review:#8b5cf6;
  --c-video:#ef4444;
  --c-announce:#06b6d4;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,sans-serif;
  background:radial-gradient(1200px 600px at 70% -10%,#1a2750 0%,var(--bg) 55%) fixed;
  color:var(--text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}

/* ---------- 顶部导航 ---------- */
header{
  position:sticky;top:0;z-index:50;
  backdrop-filter:blur(10px);
  background:rgba(11,17,32,.82);
  border-bottom:1px solid var(--line);
}
.nav{
  max-width:1280px;margin:0 auto;
  display:flex;align-items:center;gap:18px;
  padding:12px 20px;flex-wrap:wrap;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo{
  width:34px;height:34px;border-radius:9px;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  display:grid;place-items:center;font-size:18px;
  box-shadow:0 0 0 3px rgba(91,140,255,.18);
}
.brand-name{font-weight:700;font-size:18px;letter-spacing:.5px;white-space:nowrap}
.brand-name span{color:var(--accent)}

.tags{display:flex;gap:8px;flex-wrap:wrap;flex:1;justify-content:center}
.tag{
  padding:9px 20px;border-radius:999px;cursor:pointer;
  font-size:15px;color:var(--text-dim);
  border:1px solid var(--line);background:var(--panel);
  transition:.2s;white-space:nowrap;user-select:none;
}
.tag:hover{color:var(--text);border-color:var(--accent);transform:translateY(-1px)}
.tag.active{
  color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent-2));
  border-color:transparent;box-shadow:0 4px 12px rgba(91,140,255,.4)
}
.tag .dot{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:6px;vertical-align:middle}

.search{position:relative;flex-shrink:0;min-width:200px}
.search input{
  width:100%;padding:8px 14px 8px 36px;border-radius:999px;
  background:var(--panel);border:1px solid var(--line);
  color:var(--text);font-size:13px;outline:none;transition:.2s;
}
.search input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(91,140,255,.15)}
.search svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);opacity:.5}

/* ---------- 主体 ---------- */
.layout{
  max-width:1280px;margin:0 auto;
  display:grid;grid-template-columns:1fr 150px;gap:24px;
  padding:28px 20px 80px;
}
.timeline-wrap{position:relative;min-width:0}

/* 日期分段标题 */
.segment{margin-bottom:10px}
.seg-head{
  display:flex;align-items:center;gap:12px;
  margin:18px 0 22px 6px;
}
.seg-badge{
  font-size:13px;font-weight:700;color:#fff;
  padding:4px 12px;border-radius:6px;
  background:linear-gradient(135deg,rgba(91,140,255,.25),rgba(124,58,237,.25));
  border:1px solid rgba(91,140,255,.4);
}
.seg-line{flex:1;height:1px;background:linear-gradient(90deg,var(--line),transparent)}

/* 时间轴 */
.timeline{position:relative;padding-left:42px}
.timeline::before{
  content:"";position:absolute;left:15px;top:6px;bottom:6px;
  width:2px;background:linear-gradient(180deg,var(--accent),var(--accent-2),var(--line));
}

.node{position:relative;margin-bottom:18px}
.node-dot{
  position:absolute;left:-34px;top:18px;width:14px;height:14px;
  border-radius:50%;background:var(--accent);
  box-shadow:0 0 0 4px rgba(91,140,255,.18);
}
.node-dot::after{
  content:"";position:absolute;inset:-6px;border-radius:50%;
  border:2px solid var(--accent);opacity:.6;
  animation:pulse 2.4s ease-out infinite;
}
@keyframes pulse{
  0%{transform:scale(.7);opacity:.7}
  100%{transform:scale(2.1);opacity:0}
}

.card{
  background:linear-gradient(180deg,var(--panel),var(--panel-2));
  border:1px solid var(--line);border-radius:14px;
  padding:16px 18px;cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow);
  border-color:rgba(91,140,255,.5);
}
.card-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:8px}
.card-time{font-size:12px;color:var(--text-mute)}
.type-chip{
  font-size:12px;font-weight:600;padding:2px 10px;border-radius:999px;
  color:#fff;display:inline-flex;align-items:center;gap:5px;
}
.type-chip .ico{font-size:13px;line-height:1}
.card-title{font-size:16px;font-weight:700;margin-bottom:6px}
.card-summary{font-size:13.5px;color:var(--text-dim);margin-bottom:10px}
.card-foot{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.source-link{
  font-size:12.5px;color:var(--accent);display:inline-flex;align-items:center;gap:5px;
  padding:3px 0;transition:.2s;
}
.source-link:hover{text-decoration:underline}
.actions{margin-left:auto;display:flex;gap:8px}
.btn{
  font-size:12.5px;padding:6px 14px;border-radius:8px;cursor:pointer;
  border:1px solid var(--line);background:var(--bg-2);color:var(--text-dim);
  transition:.2s;
}
.btn:hover{color:#fff;border-color:var(--accent);background:rgba(91,140,255,.15)}
.btn.primary{
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  border-color:transparent;color:#fff;
}
.btn.primary:hover{box-shadow:0 4px 12px rgba(91,140,255,.4);transform:translateY(-1px)}

/* 空状态 */
.empty{
  text-align:center;padding:80px 20px;color:var(--text-mute);
}
.empty .emoji{font-size:42px;margin-bottom:12px;display:block}
.empty p{font-size:15px}

/* ---------- 右侧锚点 ---------- */
.anchors{
  position:sticky;top:90px;align-self:start;
  display:flex;flex-direction:column;gap:8px;
  padding:14px 12px;border-radius:12px;
  background:var(--panel);border:1px solid var(--line);
}
.anchors h4{font-size:12px;color:var(--text-mute);margin-bottom:4px;font-weight:600}
.anchor{
  font-size:13px;color:var(--text-dim);padding:7px 12px;border-radius:8px;
  cursor:pointer;transition:.2s;border-left:3px solid transparent;
}
.anchor:hover{background:var(--bg-2);color:var(--text)}
.anchor.active{background:var(--bg-2);color:#fff;border-left-color:var(--accent)}

/* ---------- 模态框 ---------- */
.modal-mask{
  position:fixed;inset:0;z-index:100;
  background:rgba(5,9,20,.72);backdrop-filter:blur(4px);
  display:none;align-items:center;justify-content:center;padding:20px;
}
.modal-mask.show{display:flex;animation:fade .2s ease}
@keyframes fade{from{opacity:0}to{opacity:1}}
.modal{
  width:min(560px,100%);max-height:86vh;overflow:auto;
  background:var(--panel);border:1px solid var(--line);
  border-radius:16px;padding:24px;box-shadow:var(--shadow);
  animation:pop .25s ease;
}
@keyframes pop{from{transform:scale(.94);opacity:0}to{transform:scale(1);opacity:1}}
.modal-close{
  float:right;cursor:pointer;font-size:22px;color:var(--text-mute);
  line-height:1;background:none;border:none;
}
.modal-close:hover{color:var(--text)}
.modal-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:6px 0 12px}
.modal-title{font-size:20px;font-weight:700;margin-bottom:12px}
.modal-summary{font-size:14.5px;color:var(--text-dim);margin-bottom:18px;line-height:1.8}
.modal-source{font-size:13px;color:var(--text-mute);margin-bottom:18px}
.modal-actions{display:flex;gap:10px;justify-content:flex-end}

/* ---------- 响应式 ---------- */
@media (max-width:900px){
  .layout{grid-template-columns:1fr;padding:18px 14px 60px}
  .anchors{
    position:static;flex-direction:row;flex-wrap:wrap;order:-1;margin-bottom:8px;
  }
  .anchors h4{width:100%}
  .anchor{border-left:none;border-bottom:3px solid transparent}
  .anchor.active{border-left:none;border-bottom-color:var(--accent)}
}
@media (max-width:640px){
  .nav{gap:12px;padding:12px 14px}
  .tags{order:3;width:100%;justify-content:flex-start;overflow-x:auto;flex-wrap:nowrap;padding-bottom:4px}
  .search{width:100%;order:2;min-width:0}
  .timeline{padding-left:34px}
  .timeline::before{left:11px}
  .node-dot{left:-30px}
  .card-title{font-size:15px}
  .actions{margin-left:0;width:100%}
  .btn{flex:1;text-align:center}
}