/* ============================================================
   巨量星辰 · 知识库栏目样式
   依赖 assets/style.css 中的 CSS 变量，不重复定义品牌色
   ============================================================ */

/* ---------------- 知识库首页 Hero ---------------- */
.kb-hero {
  position: relative; overflow: hidden; color: #fff; text-align: center;
  padding: 72px 0 66px;
  background:
    radial-gradient(880px 440px at 78% -12%, rgba(198,161,91,0.20), transparent 62%),
    radial-gradient(640px 360px at 10% 90%, rgba(18,42,82,0.6), transparent 55%),
    linear-gradient(180deg, #0E2143 0%, var(--ink) 46%, var(--ink-deep) 100%);
}
.kb-hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .48;
  background-image:
    linear-gradient(rgba(198,161,91,0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(198,161,91,0.055) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(700px 420px at 50% 0%, #000 28%, transparent 76%);
  -webkit-mask-image: radial-gradient(700px 420px at 50% 0%, #000 28%, transparent 76%);
}
.kb-hero .wrap { position: relative; }
.kb-hero h1 {
  margin: 22px 0 0; font-family: var(--serif); font-weight: 700;
  font-size: clamp(30px, 4.6vw, 50px); letter-spacing: 8px; line-height: 1.3;
  background: linear-gradient(120deg, #F7ECC8 0%, #E3C584 38%, #C6A15B 68%, #B18A45 100%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.kb-hero .sub {
  margin: 16px auto 0; max-width: 700px; font-size: 14.5px; letter-spacing: 1px;
  color: rgba(255,255,255,0.74); line-height: 1.95;
}
.kb-hero-stats {
  margin-top: 34px; display: flex; justify-content: center; gap: clamp(28px, 6vw, 78px);
  flex-wrap: wrap;
}
.kb-hero-stats b {
  display: block; font-family: var(--serif); font-size: 27px; color: var(--gold-light);
  letter-spacing: 1px;
}
.kb-hero-stats span { font-size: 11.5px; letter-spacing: 2.5px; color: rgba(255,255,255,0.55); }

/* ---------------- 分类筛选 ---------------- */
.kb-list-sec { padding-top: 56px; }
.kb-cats { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-bottom: 40px; }
.kb-chip {
  font-family: var(--sans); font-size: 13px; letter-spacing: 1.5px; cursor: pointer;
  padding: 8px 22px; border-radius: 999px; color: var(--muted);
  background: #fff; border: 1px solid var(--line);
  transition: color .25s, border-color .25s, background .25s;
}
.kb-chip:hover { color: var(--gold-deep); border-color: rgba(198,161,91,0.55); }
.kb-chip.on {
  color: #fff; background: linear-gradient(135deg, #D6B273, var(--gold-deep));
  border-color: transparent; box-shadow: 0 10px 22px -12px rgba(169,132,63,0.7);
}

/* ---------------- 文章卡片 ---------------- */
.kb-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.kb-card {
  position: relative; display: flex; flex-direction: column;
  background: var(--card); border: 1px solid var(--line); border-radius: 16px;
  padding: 28px 28px 22px; overflow: hidden;
  transition: transform .3s, box-shadow .3s, border-color .3s;
}
.kb-card::after {
  content: ""; position: absolute; left: 0; top: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--gold-light), var(--gold-deep));
  opacity: 0; transition: opacity .3s;
}
.kb-card:hover { transform: translateY(-5px); border-color: rgba(198,161,91,0.45); box-shadow: 0 24px 46px -22px rgba(10,26,51,0.24); }
.kb-card:hover::after { opacity: 1; }
.kb-card[hidden] { display: none; }
.kb-card-no {
  font-family: var(--serif); font-size: 12px; letter-spacing: 3px; color: var(--gold-deep);
  opacity: .75;
}
.kb-card-tag {
  position: absolute; top: 26px; right: 26px;
  font-size: 10.5px; letter-spacing: 1.5px; color: var(--gold-deep);
  background: var(--gold-soft); border: 1px solid rgba(198,161,91,0.28);
  padding: 2px 10px; border-radius: 999px;
}
.kb-card h3 {
  margin: 12px 0 10px; font-family: var(--serif); font-size: 19px; line-height: 1.55;
  color: var(--ink); letter-spacing: .5px; max-width: 88%;
}
.kb-card p { font-size: 13.2px; color: var(--muted); line-height: 1.9; flex: 1; }
.kb-card-foot {
  margin-top: 18px; padding-top: 14px; border-top: 1px dashed var(--line);
  display: flex; align-items: center; justify-content: space-between;
  font-size: 12px; color: var(--muted); letter-spacing: 1px;
}
.kb-card-foot i { font-style: normal; color: var(--gold-deep); letter-spacing: 1px; }
.kb-empty { text-align: center; color: var(--muted); font-size: 13px; padding: 30px 0; }

/* ---------------- 面包屑 ---------------- */
.kb-crumb {
  background: var(--bg-alt); border-bottom: 1px solid var(--line);
  font-size: 12.5px; color: var(--muted); letter-spacing: .5px;
}
.kb-crumb .wrap { display: flex; align-items: center; gap: 10px; padding: 13px 28px; flex-wrap: wrap; }
.kb-crumb a { color: var(--muted); transition: color .2s; }
.kb-crumb a:hover { color: var(--gold-deep); }
.kb-crumb i { font-style: normal; color: #C9CCD4; }
.kb-crumb span { color: var(--ink); max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---------------- 文章布局 ---------------- */
.kb-layout {
  display: grid; grid-template-columns: minmax(0, 1fr) 248px; gap: 56px;
  padding-top: 54px; padding-bottom: 82px; align-items: start;
}
.kb-article { min-width: 0; }
.kb-cat {
  display: inline-block; font-size: 11.5px; letter-spacing: 2.5px;
  color: var(--gold-deep); background: var(--gold-soft);
  border: 1px solid rgba(198,161,91,0.3);
  padding: 4px 14px; border-radius: 999px;
}
.kb-article > h1 {
  margin: 18px 0 0; font-family: var(--serif); font-weight: 700;
  font-size: clamp(25px, 3.1vw, 34px); line-height: 1.5; letter-spacing: 1.5px;
  color: var(--ink);
}
.kb-meta {
  margin-top: 14px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  font-size: 12.5px; color: var(--muted); letter-spacing: 1px;
}
.kb-meta i { font-style: normal; color: #C9CCD4; }
.kb-meta::after {
  content: ""; flex: 1 1 100%; height: 1px; margin-top: 6px;
  background: linear-gradient(90deg, var(--line), transparent);
}

/* 结论先行块 */
.kb-answer {
  position: relative; margin: 30px 0 6px; padding: 24px 26px 22px 26px;
  border-radius: 14px; border: 1px solid rgba(198,161,91,0.38);
  background: linear-gradient(135deg, rgba(198,161,91,0.11), rgba(198,161,91,0.03));
}
.kb-answer::before {
  content: ""; position: absolute; left: 0; top: 16px; bottom: 16px; width: 3px;
  border-radius: 3px; background: linear-gradient(180deg, var(--gold-light), var(--gold-deep));
}
.kb-answer-tag {
  display: inline-block; font-size: 10.5px; letter-spacing: 3px; color: var(--gold-deep);
  margin-bottom: 9px;
}
.kb-answer p { font-size: 14.8px; line-height: 2; color: var(--ink); letter-spacing: .3px; }

/* 正文排版 */
.kb-body { margin-top: 40px; }
.kb-body h2 {
  position: relative; margin: 46px 0 16px; padding-left: 16px;
  font-family: var(--serif); font-size: 20.5px; letter-spacing: 1.5px;
  color: var(--ink); line-height: 1.6; scroll-margin-top: 92px;
}
.kb-body h2::before {
  content: ""; position: absolute; left: 0; top: .45em; width: 4px; height: 1.05em;
  border-radius: 2px; background: linear-gradient(180deg, var(--gold-light), var(--gold-deep));
}
.kb-body h3 {
  margin: 30px 0 10px; font-family: var(--serif); font-size: 16.5px;
  color: var(--ink); letter-spacing: 1px;
}
.kb-body h3::before { content: "· "; color: var(--gold); }
.kb-body p { margin: 12px 0; font-size: 14.8px; line-height: 1.98; color: var(--text); letter-spacing: .2px; }
.kb-body b { color: var(--ink); font-weight: 600; }

.kb-list { margin: 14px 0; padding: 0; }
.kb-list li {
  position: relative; padding: 7px 0 7px 22px; font-size: 14.5px;
  line-height: 1.9; color: var(--text);
}
.kb-list li::before {
  content: ""; position: absolute; left: 2px; top: 17px; width: 7px; height: 7px;
  border-radius: 2px; transform: rotate(45deg);
  background: linear-gradient(135deg, var(--gold-light), var(--gold-deep));
}
.kb-num { margin: 14px 0; padding: 0; list-style: none; counter-reset: kbn; }
.kb-num li {
  position: relative; padding: 8px 0 8px 38px; font-size: 14.5px; line-height: 1.9;
  counter-increment: kbn;
}
.kb-num li::before {
  content: counter(kbn, decimal-leading-zero);
  position: absolute; left: 0; top: 9px;
  font-family: var(--serif); font-size: 12.5px; letter-spacing: .5px;
  color: var(--gold-deep); background: var(--gold-soft);
  border: 1px solid rgba(198,161,91,0.28); border-radius: 6px;
  padding: 1px 7px;
}
.kb-check li::before {
  content: "☐"; background: none; border: none; transform: none;
  font-size: 15px; top: 9px; left: 2px; color: var(--gold-deep);
}

/* 对比表格 */
.kb-table {
  width: 100%; margin: 20px 0 8px; border-collapse: collapse;
  font-size: 13.6px; background: var(--card);
  border: 1px solid var(--line); border-radius: 12px; overflow: hidden;
  box-shadow: 0 8px 26px -20px rgba(10,26,51,0.3);
}
.kb-table th {
  background: linear-gradient(120deg, var(--ink), var(--ink-2));
  color: var(--gold-light); font-family: var(--serif); font-weight: 700;
  font-size: 13.5px; letter-spacing: 1.5px; padding: 12px 16px; text-align: left;
}
.kb-table td { padding: 12px 16px; border-top: 1px solid var(--line); line-height: 1.8; vertical-align: top; }
.kb-table tr:nth-child(even) td { background: var(--bg-alt); }
.kb-table td:first-child { color: var(--ink); font-weight: 600; white-space: nowrap; }

/* ---------------- FAQ ---------------- */
.kb-faq { margin-top: 56px; padding-top: 8px; border-top: 1px solid var(--line); }
.kb-faq > h2 {
  margin: 34px 0 6px; font-family: var(--serif); font-size: 22px; letter-spacing: 3px; color: var(--ink);
}
.kb-faq details {
  border-bottom: 1px dashed var(--line); padding: 4px 0;
}
.kb-faq summary {
  cursor: pointer; list-style: none; position: relative;
  padding: 16px 34px 16px 26px; font-size: 14.8px; font-weight: 600;
  color: var(--ink); letter-spacing: .3px; line-height: 1.7;
}
.kb-faq summary::-webkit-details-marker { display: none; }
.kb-faq summary::before {
  content: "Q"; position: absolute; left: 0; top: 17px;
  font-family: var(--serif); font-size: 13px; font-weight: 700;
  color: var(--gold-deep);
}
.kb-faq summary::after {
  content: "+"; position: absolute; right: 6px; top: 50%; transform: translateY(-50%);
  font-size: 17px; color: var(--gold); transition: transform .25s;
}
.kb-faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.kb-faq details[open] summary { color: var(--gold-deep); }
.kb-a { padding: 0 6px 16px 26px; }
.kb-a p { font-size: 14.2px; line-height: 1.95; color: var(--text); }

/* ---------------- 实体信息块（N.A.P.） ---------------- */
.kb-entity {
  margin-top: 52px; padding: 24px 26px; border-radius: 14px;
  background: var(--bg-alt); border: 1px solid var(--line);
}
.kb-entity-head { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.kb-entity-head img { height: 30px; width: auto; }
.kb-entity-head span { font-family: var(--serif); font-size: 15px; letter-spacing: 2px; color: var(--ink); }
.kb-entity dl { margin: 0; display: grid; gap: 8px; }
.kb-entity dl > div { display: grid; grid-template-columns: 82px 1fr; gap: 14px; font-size: 13.2px; }
.kb-entity dt { color: var(--muted); letter-spacing: 1px; }
.kb-entity dd { margin: 0; color: var(--ink); line-height: 1.75; }

/* ---------------- 继续阅读 ---------------- */
.kb-rel { margin-top: 44px; }
.kb-rel h3 {
  font-family: var(--serif); font-size: 15px; letter-spacing: 3px; color: var(--gold-deep);
  margin-bottom: 14px;
}
.kb-rel a {
  display: flex; align-items: baseline; justify-content: space-between; gap: 16px;
  padding: 13px 4px; border-top: 1px solid var(--line);
  transition: padding-left .25s, color .25s;
}
.kb-rel a:last-child { border-bottom: 1px solid var(--line); }
.kb-rel a:hover { padding-left: 10px; }
.kb-rel a b { font-family: var(--serif); font-size: 14.5px; color: var(--ink); font-weight: 700; letter-spacing: .5px; }
.kb-rel a:hover b { color: var(--gold-deep); }
.kb-rel a span { flex: none; font-size: 11px; letter-spacing: 1.5px; color: var(--muted); }

/* ---------------- 侧栏 ---------------- */
.kb-aside { position: sticky; top: 92px; display: grid; gap: 18px; }
.kb-toc { border-left: 2px solid var(--line); padding-left: 18px; }
.kb-toc h4 {
  font-family: var(--serif); font-size: 12.5px; letter-spacing: 3px;
  color: var(--muted); margin-bottom: 12px;
}
.kb-toc ol { margin: 0; padding: 0; list-style: none; }
.kb-toc li { margin: 0; }
.kb-toc a {
  display: block; padding: 5px 0; font-size: 12.8px; line-height: 1.6;
  color: var(--muted); transition: color .2s, border-color .2s;
  border-left: 2px solid transparent; margin-left: -20px; padding-left: 18px;
}
.kb-toc a:hover { color: var(--gold-deep); }
.kb-toc a.on { color: var(--ink); border-left-color: var(--gold); font-weight: 600; }
.kb-side-cta {
  padding: 20px 18px; border-radius: 14px; text-align: center;
  background: linear-gradient(150deg, var(--ink) 0%, var(--ink-2) 100%);
  border: 1px solid rgba(198,161,91,0.32);
}
.kb-side-cta b {
  display: block; font-family: var(--serif); font-size: 14px; letter-spacing: 1px;
  color: var(--gold-light); margin-bottom: 8px;
}
.kb-side-cta p { font-size: 12px; line-height: 1.8; color: rgba(255,255,255,0.62); margin-bottom: 14px; }
.kb-side-cta .btn-gold { width: 100%; justify-content: center; padding: 9px 12px; font-size: 12.5px; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1080px) {
  .kb-layout { grid-template-columns: 1fr; gap: 0; padding-top: 42px; }
  .kb-aside { position: static; display: none; }
}
@media (max-width: 860px) {
  .kb-grid { grid-template-columns: 1fr; }
  .kb-card h3 { max-width: 100%; }
}
@media (max-width: 620px) {
  .kb-hero { padding: 54px 0 46px; }
  .kb-hero h1 { letter-spacing: 4px; }
  .kb-body h2 { font-size: 18.5px; margin-top: 38px; }
  .kb-body p, .kb-list li, .kb-num li { font-size: 14.2px; }
  .kb-table { font-size: 12.6px; }
  .kb-table th, .kb-table td { padding: 10px 11px; }
  .kb-table td:first-child { white-space: normal; }
  .kb-answer { padding: 20px 18px 18px; }
  .kb-answer p { font-size: 14.2px; }
  .kb-entity dl > div { grid-template-columns: 1fr; gap: 2px; }
}