/* ============================================================
   AI 新闻雷达 — 编辑部杂志风
   纸张底 / 衬线大标题 / 细分割线 / 大量留白
   ============================================================ */
:root{
  --paper:#f6f2e8;
  --paper-hi:#fffdf7;
  --ink:#191512;
  --ink-2:#585148;
  --ink-3:#938b7d;
  --rule:#191512;
  --accent:#b4392a;     /* 朱红 */
  --accent-2:#20408f;   /* 墨蓝 */
  --maxw:1160px;
  --serif:"Newsreader","Fraunces",Georgia,"Songti SC","Noto Serif SC",serif;
  --display:"Fraunces",Georgia,"Songti SC",serif;
  --sans:"Archivo","Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  color:var(--ink);
  font-family:var(--serif);
  font-size:17px;
  line-height:1.6;
  background:
    radial-gradient(1200px 520px at 10% -10%, var(--paper-hi) 0%, transparent 60%),
    radial-gradient(900px 620px at 112% 6%, #ece3d1 0%, transparent 55%),
    var(--paper);
  background-attachment:fixed;
}
/* 纸张颗粒 */
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.5;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.35'/%3E%3C/svg%3E");
  mix-blend-mode:multiply;
}
.paper{position:relative;z-index:1;max-width:var(--maxw);margin:0 auto;padding:30px clamp(18px,4vw,54px) 60px}
a{color:inherit;text-decoration:none}

.kicker{
  font-family:var(--sans);font-size:11px;font-weight:700;
  letter-spacing:.22em;text-transform:uppercase;color:var(--ink-2);
}
.kicker.accent{color:var(--accent)}

/* ---------------------------- 报头 ---------------------------- */
.masthead{padding-top:6px}
.topline{display:flex;justify-content:space-between;align-items:baseline;gap:16px;
  font-family:var(--sans);font-size:11px;font-weight:600;letter-spacing:.18em;
  text-transform:uppercase;color:var(--ink-2);padding-bottom:14px}
.dateline{color:var(--ink-3)}

.brandrow{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;flex-wrap:wrap}
.wordmark{
  font-family:var(--display);font-weight:900;font-style:normal;
  font-size:clamp(42px,8.4vw,88px);line-height:.92;letter-spacing:-.02em;
  margin:0;font-variation-settings:"opsz" 120;
  text-shadow:0 1px 0 rgba(255,255,255,.6);
}
.wordmark::after{content:"©";font-size:.22em;vertical-align:super;color:var(--accent);margin-left:.35em;font-weight:400}

.controls{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding-bottom:8px}
.search{display:flex;align-items:center;gap:9px;border-bottom:1px solid var(--ink);
  padding:4px 2px;min-width:210px}
.search-label{font-family:var(--sans);font-size:10.5px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-3);white-space:nowrap;flex:none}
.search input{border:0;background:transparent;outline:none;font-family:var(--serif);font-size:16px;color:var(--ink);width:100%}
.search input::placeholder{color:var(--ink-3);font-style:italic}
.btn{
  font-family:var(--sans);font-size:11px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;
  color:var(--ink);background:transparent;border:1px solid var(--ink);border-radius:0;
  padding:9px 16px;cursor:pointer;transition:background .18s ease,color .18s ease}
.btn:hover{background:var(--ink);color:var(--paper)}
.btn:disabled{opacity:.45;cursor:progress}
.btn-accent{background:var(--accent);border-color:var(--accent);color:#fff}
.btn-accent:hover{background:#8f2b1f;border-color:#8f2b1f;color:#fff}
.backlink{display:inline-block;font-family:var(--sans);font-size:11px;font-weight:600;
  letter-spacing:.16em;text-transform:uppercase;color:var(--ink-2);
  padding:2px 0;margin:0 0 10px;border-bottom:1px solid transparent;transition:.15s}
.backlink:hover{color:var(--accent);border-color:var(--accent)}
.auto{display:flex;align-items:center;gap:6px;font-family:var(--sans);font-size:11px;
  font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-2);cursor:pointer}
.auto input{accent-color:var(--accent)}

.rule-thick{height:2px;background:var(--rule);margin-top:18px}
.sections{display:flex;flex-wrap:wrap;gap:26px;padding:13px 0 12px}
.tab{
  font-family:var(--sans);font-size:12px;font-weight:600;letter-spacing:.08em;
  color:var(--ink-2);background:none;border:0;cursor:pointer;padding:2px 0;
  position:relative;transition:color .15s ease}
.tab:hover{color:var(--ink)}
.tab .n{font-size:10px;vertical-align:super;color:var(--ink-3);margin-left:3px}
.tab.active{color:var(--accent)}
.tab.active::after{content:"";position:absolute;left:0;right:0;bottom:-3px;height:2px;background:var(--accent)}
.rule{height:1px;background:var(--rule);opacity:.3}

/* ---------------------------- 头条 ---------------------------- */
.lead{padding:34px 0 30px;border-bottom:1px solid rgba(25,21,18,.35)}
.lead-card{display:grid;grid-template-columns:1fr;gap:18px}
.lead-title{
  font-family:var(--display);font-weight:600;font-variation-settings:"opsz" 100;
  font-size:clamp(30px,5.2vw,54px);line-height:1.06;letter-spacing:-.015em;
  margin:.35em 0 0;max-width:20ch}
.lead-title a{background-image:linear-gradient(var(--accent),var(--accent));
  background-size:0% 2px;background-repeat:no-repeat;background-position:0 100%;
  transition:background-size .35s ease}
.lead-title a:hover{background-size:100% 2px}
.lead-deck{font-family:var(--serif);font-size:clamp(16px,1.6vw,19px);color:var(--ink-2);
  max-width:62ch;margin:16px 0 0}
.lead-meta{display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  font-family:var(--sans);font-size:11px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3)}
.lead-meta .src{color:var(--accent)}
.lead-meta .read{color:var(--ink);border-bottom:1px solid var(--ink);padding-bottom:1px;margin-left:auto}
.lead-meta .read:hover{color:var(--accent);border-color:var(--accent)}

/* ---------------------------- 双栏 ---------------------------- */
.columns{display:grid;grid-template-columns:minmax(0,1fr) 258px;gap:clamp(30px,5vw,64px);padding-top:34px}

.sechead{display:flex;align-items:baseline;gap:12px;
  font-family:var(--sans);font-size:12px;font-weight:700;letter-spacing:.2em;text-transform:uppercase;
  color:var(--ink);margin:0 0 4px;padding-bottom:10px;border-bottom:2px solid var(--rule)}
.sechead-count{color:var(--ink-3);font-weight:600;letter-spacing:.1em}

.stream{list-style:none;margin:0;padding:0}
.stream .item{display:grid;grid-template-columns:58px 1fr;gap:18px;
  padding:22px 0;border-bottom:1px solid rgba(25,21,18,.22)}
.stream .idx{font-family:var(--display);font-weight:900;font-size:30px;line-height:1;color:var(--ink);
  opacity:.28;font-variant-numeric:tabular-nums;padding-top:2px}
.stream .item-title{font-family:var(--display);font-weight:600;font-size:clamp(19px,2.1vw,24px);
  line-height:1.22;margin:0;letter-spacing:-.01em}
.stream .item-title a{background-image:linear-gradient(var(--accent),var(--accent));
  background-size:0% 1.5px;background-repeat:no-repeat;background-position:0 100%;transition:background-size .3s ease}
.stream .item-title a:hover{background-size:100% 1.5px}
.stream .item-sum{margin:8px 0 0;color:var(--ink-2);font-size:16px;max-width:70ch}
.stream .item-meta{margin-top:10px;display:flex;align-items:center;gap:12px;
  font-family:var(--sans);font-size:10.5px;font-weight:600;letter-spacing:.13em;text-transform:uppercase;color:var(--ink-3)}
.stream .item-meta .src{color:var(--accent-2)}
.stream .item-meta .time{margin-left:auto}

.empty{padding:48px 0;color:var(--ink-2);font-style:italic}

/* ---------------------------- 侧栏 ---------------------------- */
.rail{position:sticky;top:24px;align-self:start}
.rail-block{margin-bottom:34px}
.railhead{font-family:var(--sans);font-size:11px;font-weight:700;letter-spacing:.2em;text-transform:uppercase;
  color:var(--ink);margin:0 0 14px;padding-bottom:8px;border-bottom:1px solid var(--rule)}
.stats{display:grid;gap:14px}
.stat{display:flex;align-items:baseline;justify-content:space-between;gap:10px;flex-wrap:nowrap}
.stat b{font-family:var(--display);font-weight:900;font-size:32px;line-height:1;
  font-variant-numeric:tabular-nums;white-space:nowrap;flex:0 0 auto;min-width:max-content}
.stat span{font-family:var(--sans);font-size:10.5px;font-weight:600;letter-spacing:.14em;
  text-transform:uppercase;color:var(--ink-3);text-align:right;flex:1 1 auto;min-width:0}

.sources{display:grid;gap:9px}
.srcrow{display:flex;align-items:center;gap:9px;font-family:var(--sans);font-size:12px;font-weight:600;letter-spacing:.03em;color:var(--ink-2)}
.srcrow .dot{width:8px;height:8px;border-radius:50%;background:var(--ink-2);flex:none}
.srcrow.ok .dot{background:#1f7a4d}
.srcrow.bad{color:var(--ink-3)}
.srcrow.bad .dot{background:var(--accent)}
.srcrow .cnt{margin-left:auto;font-variant-numeric:tabular-nums;color:var(--ink-3)}

.railnote{font-size:14.5px;color:var(--ink-2);margin:0 0 10px}
.railnote-dim{font-family:var(--sans);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3)}

.colophon{padding-top:40px;font-family:var(--sans);font-size:11px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--ink-3);text-align:center}
.colophon p{margin:14px 0 0}
.colophon strong{color:var(--ink-2)}

/* ---------------------------- 动效 ---------------------------- */
@keyframes rise{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.lead-card{animation:rise .6s cubic-bezier(.2,.7,.2,1) both}
.stream .item{animation:rise .55s cubic-bezier(.2,.7,.2,1) both;
  animation-delay:calc(var(--i,0) * 32ms)}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* ---------------------------- 响应式 ---------------------------- */
@media(max-width:900px){
  .columns{grid-template-columns:1fr;gap:36px}
  .rail{position:static;border-top:1px solid rgba(25,21,18,.3);padding-top:28px}
  .stream .item{grid-template-columns:44px 1fr;gap:14px}
  .stream .idx{font-size:24px}
}
@media(max-width:620px){
  .topline{flex-direction:column;gap:4px}
  .controls{width:100%;padding-bottom:0}
  .search{flex:1}
  .sections{gap:18px}
  .lead-meta .read{margin-left:0}
}