.page-news{
  --obs-rule:var(--line);
  --obs-gap:28px;
  padding-bottom:72px;
}

/* 面包屑 */
.page-news .crumbs{padding-top:20px;font-size:13px;}
.page-news .crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;}
.page-news .crumbs li{display:flex;align-items:center;gap:8px;color:var(--muted);}
.page-news .crumbs li+li::before{content:"/";color:var(--line);}
.page-news .crumbs a{color:var(--muted);text-decoration:none;}
.page-news .crumbs a:hover{color:var(--cyan);}
.page-news .crumbs [aria-current]{color:var(--text);}

/* 头图框景 */
.page-news .obs-hero{padding-top:22px;}
.page-news .obs-frame{
  position:relative;
  border:1px solid var(--obs-rule);
  background:
    radial-gradient(120% 140% at 88% -10%, rgba(255,106,31,.14), transparent 58%),
    radial-gradient(90% 120% at 0% 110%, rgba(43,231,218,.10), transparent 60%),
    var(--void);
  box-shadow:var(--shadow-soft);
  overflow:hidden;
}
.page-news .obs-frame::before,
.page-news .obs-frame::after{
  content:"";
  position:absolute;
  left:14px;right:14px;
  height:7px;
  background:repeating-linear-gradient(90deg,var(--obs-rule) 0 1px,transparent 1px 18px);
  opacity:.85;
  pointer-events:none;
}
.page-news .obs-frame::before{top:10px;}
.page-news .obs-frame::after{bottom:10px;}

.page-news .obs-hero-inner{
  display:grid;
  gap:18px;
  padding:34px 22px 30px;
}
.page-news .obs-hero-inner .eyebrow{
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--cyan);
  text-transform:none;
}
.page-news .obs-hero h1{
  margin:0;
  max-width:20ch;
  font-family:var(--font-sans);
  font-weight:900;
  font-size:30px;
  line-height:1.24;
  letter-spacing:-.02em;
  color:var(--text);
}
.page-news .obs-lead{
  margin:0;
  max-width:60ch;
  font-size:16px;
  line-height:1.75;
  color:var(--muted);
}
.page-news .obs-hero-figure{margin:6px 0 0;}
.page-news .obs-hero-figure .figure-media{
  border:1px solid var(--obs-rule);
  background:var(--panel);
  overflow:hidden;
}
.page-news .obs-hero-figure img{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:1200/480;
  object-fit:cover;
}
.page-news .obs-hero-figure figcaption{
  margin-top:10px;
  padding-top:10px;
  border-top:1px solid var(--obs-rule);
  font-size:13px;
  line-height:1.6;
  color:var(--muted);
}

/* 本期索引 */
.page-news .obs-index{
  list-style:none;
  margin:16px 0 0;
  padding:1px;
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:1px;
  background:var(--obs-rule);
  border:1px solid var(--obs-rule);
}
.page-news .obs-index a{
  display:flex;
  flex-direction:column;
  gap:5px;
  height:100%;
  padding:14px 14px 16px;
  background:var(--void);
  text-decoration:none;
  transition:background .18s var(--ease);
}
.page-news .obs-index a:hover,
.page-news .obs-index a:focus-visible{background:var(--panel);}
.page-news .obs-index-num{
  font-family:var(--font-mono);
  font-size:22px;
  font-weight:700;
  line-height:1.1;
  color:var(--orange);
}
.page-news .obs-index a:hover .obs-index-num{color:var(--cyan);}
.page-news .obs-index-label{
  font-size:14px;
  font-weight:700;
  color:var(--text);
}
.page-news .obs-index-note{
  font-size:12px;
  line-height:1.5;
  color:var(--muted);
}

/* 双条目流 */
.page-news .obs-streams{padding-top:52px;}
.page-news .obs-streams-head{align-items:flex-end;}
.page-news .obs-streams-head .section-title{
  margin:6px 0 0;
  font-size:24px;
  font-weight:900;
  letter-spacing:-.02em;
  color:var(--text);
}
.page-news .obs-streams-head .section-note{
  font-size:13px;
  color:var(--muted);
}

.page-news .obs-cols{
  display:grid;
  grid-template-columns:1fr;
  gap:40px;
  margin-top:26px;
}
.page-news .obs-col{min-width:0;}
.page-news .obs-col-title{
  display:flex;
  align-items:center;
  gap:10px;
  margin:0 0 18px;
  padding-bottom:10px;
  border-bottom:1px solid var(--obs-rule);
  font-size:16px;
  font-weight:800;
  letter-spacing:.01em;
  color:var(--text);
}
.page-news .obs-col-dot{
  width:8px;height:8px;
  flex:0 0 8px;
  background:var(--orange);
  box-shadow:0 0 0 4px rgba(255,106,31,.14);
}
.page-news .obs-col--guide .obs-col-dot{
  background:var(--cyan);
  box-shadow:0 0 0 4px rgba(43,231,218,.14);
}

.page-news .obs-inline-figure{margin:0 0 20px;}
.page-news .obs-inline-figure .figure-media{
  border:1px solid var(--obs-rule);
  background:var(--panel);
  overflow:hidden;
}
.page-news .obs-inline-figure img{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:640/360;
  object-fit:cover;
}
.page-news .obs-inline-figure figcaption{
  margin-top:8px;
  font-size:12px;
  line-height:1.55;
  color:var(--muted);
}

.page-news .obs-guide-lead{
  margin:0 0 18px;
  padding:12px 14px;
  border-left:2px solid var(--cyan);
  background:rgba(43,231,218,.06);
  font-size:14px;
  line-height:1.7;
  color:var(--text);
}

/* 条目 */
.page-news .obs-item{
  --accent:var(--line);
  margin-bottom:12px;
  border:1px solid var(--obs-rule);
  border-left:3px solid var(--accent);
  background:var(--panel);
  box-shadow:var(--shadow-soft);
}
.page-news .obs-item--advance{--accent:var(--orange);}
.page-news .obs-item--delay{--accent:var(--change);}
.page-news .obs-item--split{--accent:var(--cyan);}
.page-news .obs-item--guide{--accent:var(--ok-b);}

.page-news .obs-item > summary{
  list-style:none;
  cursor:pointer;
  display:grid;
  grid-template-columns:auto 1fr;
  gap:8px 12px;
  padding:15px 16px;
  align-items:start;
}
.page-news .obs-item > summary::-webkit-details-marker{display:none;}
.page-news .obs-item > summary:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:-2px;
}
.page-news .obs-item[open] > summary{border-bottom:1px solid var(--obs-rule);}

.page-news .obs-flag{
  grid-column:1;
  grid-row:1;
  display:inline-block;
  padding:2px 7px;
  font-size:12px;
  font-weight:800;
  line-height:1.5;
  color:var(--void);
  background:var(--orange);
  white-space:nowrap;
}
.page-news .obs-item--delay .obs-flag{background:var(--change);color:var(--text);}
.page-news .obs-item--split .obs-flag{background:var(--cyan);}
.page-news .obs-flag--pkg{background:var(--wait);color:var(--void);}
.page-news .obs-flag--guide{background:var(--ok-b);color:var(--void);}

.page-news .obs-title{
  grid-column:2;
  grid-row:1;
  font-size:15px;
  font-weight:700;
  line-height:1.6;
  color:var(--text);
  background-image:linear-gradient(var(--cyan),var(--cyan));
  background-repeat:no-repeat;
  background-position:0 100%;
  background-size:0 1px;
  transition:background-size .2s var(--ease),color .2s var(--ease);
}
.page-news .obs-item > summary:hover .obs-title{
  background-size:100% 1px;
  color:#fff;
}
.page-news .obs-when{
  grid-column:2;
  grid-row:2;
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--muted);
}

.page-news .obs-body{padding:14px 16px 18px;}
.page-news .obs-body > p{
  margin:0 0 12px;
  font-size:14px;
  line-height:1.75;
  color:var(--muted);
}

.page-news .obs-facts{
  margin:0;
  display:grid;
  grid-template-columns:1fr;
  gap:1px;
  background:var(--obs-rule);
  border:1px solid var(--obs-rule);
}
.page-news .obs-facts > div{
  display:flex;
  justify-content:space-between;
  gap:12px;
  padding:9px 11px;
  background:var(--void);
}
.page-news .obs-facts dt{
  font-size:12px;
  color:var(--muted);
}
.page-news .obs-facts dd{
  margin:0;
  font-size:13px;
  font-weight:700;
  text-align:right;
  color:var(--text);
}
.page-news .obs-facts dd.num{font-family:var(--font-mono);}

.page-news .obs-meter-row{
  display:grid;
  grid-template-columns:auto 1fr;
  gap:6px 10px;
  align-items:center;
  margin-top:12px;
}
.page-news .obs-meter-label{
  font-family:var(--font-mono);
  font-size:11px;
  color:var(--muted);
}
.page-news .obs-meter-row .meter{
  display:block;
  height:7px;
  background:var(--line);
  overflow:hidden;
}
.page-news .obs-meter-row .meter-fill{
  display:block;
  height:100%;
  background:var(--muted);
}
.page-news .obs-meter-row .meter-fill--signal{
  background:linear-gradient(90deg,var(--orange),var(--cyan));
}

.page-news .obs-col-foot{
  margin:16px 0 0;
  font-size:13px;
  line-height:1.7;
  color:var(--muted);
}
.page-news .obs-col-foot a{
  color:var(--cyan);
  text-decoration:none;
  border-bottom:1px solid rgba(43,231,218,.4);
}
.page-news .obs-col-foot a:hover{border-bottom-color:var(--cyan);}

/* 专题归档 */
.page-news .obs-topics{
  margin-top:60px;
  padding-top:44px;
  border-top:1px solid var(--obs-rule);
  background-image:repeating-linear-gradient(90deg,rgba(37,48,83,.42) 0 1px,transparent 1px 64px);
  background-position:0 0;
  background-repeat:repeat-x;
  background-size:auto 8px;
}
.page-news .obs-topics .section-title{
  margin:6px 0 0;
  font-size:24px;
  font-weight:900;
  letter-spacing:-.02em;
  color:var(--text);
}
.page-news .obs-topics .section-note{font-size:13px;color:var(--muted);}

.page-news .obs-texture{margin:22px 0 0;}
.page-news .obs-texture .figure-media{
  border:1px solid var(--obs-rule);
  overflow:hidden;
  background:var(--panel);
}
.page-news .obs-texture img{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:1200/240;
  object-fit:cover;
}

.page-news .obs-topic-stack{margin-top:22px;border-top:1px solid var(--obs-rule);}
.page-news .obs-topic{border-bottom:1px solid var(--obs-rule);}
.page-news .obs-topic > summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
  padding:16px 4px;
}
.page-news .obs-topic > summary::-webkit-details-marker{display:none;}
.page-news .obs-topic > summary:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:2px;
}
.page-news .obs-topic-idx{
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--orange);
}
.page-news .obs-topic-name{
  font-size:17px;
  font-weight:800;
  color:var(--text);
}
.page-news .obs-topic > summary:hover .obs-topic-name{color:var(--cyan);}
.page-news .obs-topic-count{
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--muted);
}

.page-news .obs-topic-list{
  list-style:none;
  margin:0 0 18px;
  padding:0 0 0 2px;
}
.page-news .obs-topic-list li{
  position:relative;
  display:grid;
  gap:3px;
  padding:11px 0 11px 18px;
  border-left:1px solid var(--obs-rule);
}
.page-news .obs-topic-list li::before{
  content:"";
  position:absolute;
  left:-4px;
  top:18px;
  width:7px;height:7px;
  background:var(--cyan);
}
.page-news .obs-topic-when{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.04em;
  color:var(--muted);
}
.page-news .obs-topic-text{
  font-size:14px;
  line-height:1.7;
  color:var(--text);
}

/* 回看方式 */
.page-news .obs-howto{margin-top:56px;}
.page-news .obs-howto-card{
  border:1px solid var(--obs-rule);
  background:var(--panel);
  box-shadow:var(--shadow-soft);
  display:grid;
  grid-template-columns:1fr;
}
.page-news .obs-howto-main{padding:26px 20px 28px;}
.page-news .obs-howto-main .eyebrow{
  margin:0 0 6px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--cyan);
}
.page-news .obs-howto-main .section-title{
  margin:0 0 20px;
  font-size:23px;
  font-weight:900;
  letter-spacing:-.02em;
  color:var(--text);
}

.page-news .obs-steps{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:16px;
}
.page-news .obs-steps li{
  display:grid;
  grid-template-columns:auto 1fr;
  gap:12px;
  padding-bottom:16px;
  border-bottom:1px solid var(--obs-rule);
}
.page-news .obs-steps li:last-child{border-bottom:0;padding-bottom:0;}
.page-news .obs-step-num{
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:700;
  color:var(--orange);
  padding-top:3px;
}
.page-news .obs-steps h3{
  margin:0 0 5px;
  font-size:15px;
  font-weight:800;
  color:var(--text);
}
.page-news .obs-steps p{
  margin:0;
  font-size:14px;
  line-height:1.7;
  color:var(--muted);
}
.page-news .obs-steps a{
  color:var(--cyan);
  text-decoration:none;
  border-bottom:1px solid rgba(43,231,218,.4);
}
.page-news .obs-steps a:hover{border-bottom-color:var(--cyan);}

.page-news .obs-howto-side{
  display:grid;
  grid-template-columns:1fr;
  gap:1px;
  background:var(--obs-rule);
  border-top:1px solid var(--obs-rule);
}
.page-news .obs-side-block{
  padding:20px;
  background:var(--void);
}
.page-news .obs-side-title{
  margin:0 0 8px;
  font-size:13px;
  font-weight:800;
  letter-spacing:.04em;
  color:var(--muted);
}
.page-news .obs-side-num{
  margin:0 0 8px;
  font-family:var(--font-mono);
  font-size:26px;
  font-weight:700;
  line-height:1.1;
  color:var(--cyan);
}
.page-news .obs-side-text{
  margin:0;
  font-size:13px;
  line-height:1.7;
  color:var(--muted);
}
.page-news .obs-side-link{margin:10px 0 0;}
.page-news .obs-side-link a{
  font-size:13px;
  font-weight:700;
  color:var(--orange);
  text-decoration:none;
}
.page-news .obs-side-link a:hover{color:var(--cyan);}

/* 中屏 */
@media (min-width:720px){
  .page-news .obs-hero h1{font-size:38px;}
  .page-news .obs-lead{font-size:17px;}
  .page-news .obs-index{grid-template-columns:repeat(4,1fr);}
  .page-news .obs-hero-inner{padding:38px 30px 32px;}
  .page-news .obs-howto-side{grid-template-columns:repeat(3,1fr);}
  .page-news .obs-topic-list li{
    grid-template-columns:180px 1fr;
    gap:14px;
    align-items:baseline;
  }
}

/* 宽屏：左变更右攻略，中间极细中线 */
@media (min-width:980px){
  .page-news .obs-hero h1{font-size:44px;max-width:22ch;}
  .page-news .obs-hero-inner{padding:44px 36px 36px;gap:20px;}
  .page-news .obs-streams-head .section-title,
  .page-news .obs-topics .section-title,
  .page-news .obs-howto-main .section-title{font-size:28px;}

  .page-news .obs-cols{
    grid-template-columns:1fr 1fr;
    gap:0;
  }
  .page-news .obs-col--change{
    padding-right:32px;
    border-right:1px solid var(--obs-rule);
  }
  .page-news .obs-col--guide{padding-left:32px;}

  .page-news .obs-howto-card{grid-template-columns:1.5fr 1fr;}
  .page-news .obs-howto-side{
    grid-template-columns:1fr;
    border-top:0;
    border-left:1px solid var(--obs-rule);
  }
  .page-news .obs-howto-main{padding:32px 34px 34px;}

  .page-news .obs-facts{grid-template-columns:1fr;}
}

/* 动效降级 */
@media (prefers-reduced-motion:reduce){
  .page-news .obs-title,
  .page-news .obs-index a{transition:none;}
}
<<<END>>>
</main>