/* ============================================================
   压铸知识库（dckb）独立设计系统 —— 复刻压铸知识培训站设计语言
   顶栏搜索 + 左侧栏（工程链路/知识分类）+ 章节分组卡片
   全部选择器带 .dckb / .kb- 前缀，避免与主站 style.css 冲突
   ============================================================ */

body.dckb {
  margin: 0;
  background: #fff;
  color: var(--ink);
  font: 14.5px/1.65 -apple-system, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  -webkit-font-smoothing: antialiased;
}
body.dckb a { color: inherit; text-decoration: none; }
body.dckb svg { width: 18px; height: 18px; }

/* ---------------- 顶栏 ---------------- */
.kb-top {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #e7eaee;
}
.kb-top-inner {
  max-width: 1760px; margin: 0 auto; padding: 0 clamp(16px, 3vw, 48px);
  display: flex; align-items: center; gap: 18px; height: 60px;
}
.kb-brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.kb-logo {
  width: 36px; height: 36px; border-radius: 9px;
  background: var(--ink); color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
}
.kb-logo svg { width: 19px; height: 19px; }
.kb-brand-t { display: flex; flex-direction: column; line-height: 1.2; }
.kb-brand-t b, .kb-brand-t { font-weight: 700; font-size: 16px; letter-spacing: .5px; }
.kb-brand-t small {
  font-size: 9px; letter-spacing: 1.6px; color: #98a2b3; font-weight: 600;
}

.kb-search {
  flex: 1; max-width: 440px;
  display: flex; align-items: center; gap: 8px;
  background: #f2f4f7; border: 1px solid transparent; border-radius: 10px;
  padding: 7px 12px; color: #98a2b3;
  transition: .15s;
}
.kb-search:focus-within { background: #fff; border-color: var(--brand); box-shadow: 0 0 0 3px rgba(124,58,237,.14); }
.kb-search svg { width: 15px; height: 15px; flex-shrink: 0; }
.kb-search input {
  flex: 1; border: 0; outline: 0; background: transparent;
  font-size: 13.5px; color: var(--ink);
}
.kb-search input::placeholder { color: #98a2b3; }
.kb-search kbd {
  font: 600 10.5px/1 inherit; color: #98a2b3;
  background: #fff; border: 1px solid #e4e7ec; border-bottom-width: 2px;
  border-radius: 5px; padding: 3px 6px; white-space: nowrap;
}

.kb-menu { display: flex; gap: 4px; margin-left: auto; flex-shrink: 0; }
.kb-menu a {
  position: relative; padding: 8px 11px; border-radius: 8px;
  font-size: 13.5px; font-weight: 500; color: #475467; white-space: nowrap;
}
.kb-menu a:hover { color: var(--ink); background: #f2f4f7; }
.kb-menu a.on { color: var(--ink); font-weight: 650; }
.kb-menu a.on::after {
  content: ""; position: absolute; left: 11px; right: 11px; bottom: -13px;
  height: 2px; background: var(--ink); border-radius: 2px;
}

.kb-user { display: flex; align-items: center; gap: 10px; flex-shrink: 0; font-size: 13px; }
.kb-user a:hover { color: var(--brand); }
.kb-gold {
  font-size: 11px; font-weight: 700; color: #8a5a1c;
  background: linear-gradient(120deg,#fdf3df,#f7e6bd);
  border: 1px solid #e8d5a8; border-radius: 20px; padding: 3px 9px;
}
.kb-btn, .kb-btn-line {
  display: inline-flex; align-items: center; gap: 6px;
  border-radius: 8px; padding: 6.5px 14px;
  font-size: 13px; font-weight: 600; cursor: pointer; transition: .15s;
}
.kb-btn { background: var(--brand); color: #fff !important; border: 1px solid var(--brand); }
.kb-btn:hover { background: #6d28d9; }
.kb-btn-line { background: #fff; color: #344054 !important; border: 1px solid #d0d5dd; }
.kb-btn-line:hover { border-color: #98a2b3; }
.kb-back { color: #98a2b3; font-size: 12.5px; }

/* ---------------- 布局：侧栏 + 主区 ---------------- */
.kb-shell {
  max-width: 1760px; margin: 0 auto; padding: 0 clamp(16px, 3vw, 48px);
  display: flex; gap: 34px; align-items: flex-start;
}
.kb-side {
  width: 236px; flex-shrink: 0;
  position: sticky; top: 60px;
  max-height: calc(100vh - 60px); overflow-y: auto;
  padding: 22px 0 40px;
}
.kb-si {
  display: flex; align-items: center; gap: 9px;
  padding: 7.5px 12px; margin: 1px 0; border-radius: 8px;
  font-size: 13.5px; color: #475467; border: 1px solid transparent;
}
.kb-si:hover { color: var(--ink); background: #f2f4f7; }
.kb-si.on {
  background: #fff; color: var(--ink); font-weight: 650;
  border-color: #e4e7ec; box-shadow: 0 1px 2px rgba(16,24,40,.05);
}
.kb-sic { display: inline-flex; color: #98a2b3; }
.kb-si.on .kb-sic { color: var(--brand); }
.kb-sic svg { width: 15.5px; height: 15.5px; }
.kb-si em {
  margin-left: auto; font-style: normal;
  font-size: 11.5px; color: #98a2b3; font-variant-numeric: tabular-nums;
}
.kb-sg {
  margin: 18px 12px 6px;
  font-size: 11px; font-weight: 700; letter-spacing: 1.5px;
  color: #98a2b3;
}

.kb-main { flex: 1; min-width: 0; padding: 26px 0 60px; }

/* ---------------- 面包屑 / 页头 ---------------- */
.crumbs { display: flex; gap: 8px; align-items: center; font-size: 12.5px; color: #98a2b3; margin-bottom: 18px; }
.crumbs a:hover { color: var(--brand); }
.kb-head { margin-bottom: 10px; }
.kb-head h1 { font-size: 27px; font-weight: 800; letter-spacing: .3px; margin: 0 0 10px; }
.kb-head p { margin: 0 0 14px; color: #475467; font-size: 14.5px; max-width: 680px; }
.kb-chips { display: flex; gap: 8px; flex-wrap: wrap; }
.kb-chip {
  font-size: 12px; color: #475467; background: #f2f4f7;
  border: 1px solid #e4e7ec; border-radius: 20px; padding: 4px 11px;
}
.kb-chip b { color: var(--ink); }
.kb-chip-gold { color: #8a5a1c; background: #fdf8ef; border-color: #e8d5a8; }
.kb-note { color: #667085; font-size: 13px; margin-top: 12px; }
.kb-note a { color: var(--brand); font-weight: 600; }
.kb-src { font-size: 12px; color: #98a2b3; margin: 8px 0 0; }

/* ---------------- 首页 hero ---------------- */
.kb-hero { padding: 26px 0 8px; }
.kb-hero h1 { font-size: 32px; font-weight: 800; line-height: 1.3; margin: 0 0 14px; letter-spacing: .5px; }
.kb-hero p { font-size: 15px; color: #475467; max-width: 620px; margin: 0 0 18px; }
.kb-hero-lock { margin-top: 14px; font-size: 13px; color: #8a5a1c; background: #fdf8ef; border: 1px solid #e8d5a8; border-radius: 8px; padding: 8px 14px; display: inline-block; }

/* ---------------- 区块标题 ---------------- */
.kb-sec { margin-top: 34px; }
.kb-sec-h { display: flex; align-items: baseline; gap: 12px; margin-bottom: 16px; }
.kb-sec-h b { font-size: 17px; font-weight: 750; }
.kb-sec-h span { font-size: 13px; color: #98a2b3; }

/* ---------------- 首页大卡 / 分类磁贴 ---------------- */
.kb-flow-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.kb-big {
  border: 1px solid #e4e7ec; border-radius: 14px; padding: 20px;
  background: #fff; transition: .18s; display: block;
}
.kb-big:hover { border-color: #ddd6fe; box-shadow: 0 6px 18px rgba(16,24,40,.07); transform: translateY(-2px); }
.kb-big-ic {
  display: inline-flex; width: 34px; height: 34px; border-radius: 9px;
  background: var(--brand-weak); color: var(--brand); align-items: center; justify-content: center;
  margin-bottom: 12px;
}
.kb-big b { display: block; font-size: 15px; font-weight: 700; }
.kb-big em { font-style: normal; font-size: 12px; color: var(--brand); font-weight: 600; }
.kb-big p { font-size: 12.5px; color: #667085; margin: 8px 0 0; line-height: 1.6; }

.kb-cat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.kb-tile {
  border: 1px solid #e4e7ec; border-radius: 12px; padding: 16px 18px;
  background: #fff; transition: .18s; display: block;
}
.kb-tile:hover { border-color: #ddd6fe; box-shadow: 0 5px 14px rgba(16,24,40,.06); }
.kb-tile-ic { display: inline-flex; color: var(--brand); margin-bottom: 8px; }
.kb-tile b { font-size: 14px; font-weight: 700; }
.kb-tile em { font-style: normal; font-size: 12px; color: #98a2b3; margin-left: 8px; }
.kb-tile p {
  margin: 6px 0 0; font-size: 12.5px; color: #667085;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}

.kb-stage-strip { display: flex; flex-wrap: wrap; gap: 8px; }
.kb-stage {
  display: flex; align-items: center; gap: 9px;
  border: 1px solid #e4e7ec; border-radius: 20px; padding: 7px 14px 7px 8px;
  font-size: 12.5px; color: #475467; background: #fff; transition: .15s;
}
.kb-stage:hover { border-color: #ddd6fe; color: var(--ink); }
.kb-stage i {
  font-style: normal; font-size: 11px; font-weight: 700; color: var(--brand);
  background: var(--brand-weak); border-radius: 14px; padding: 3px 8px;
}

/* ---------------- 章节分组 + 文章卡片 ---------------- */
.kb-group { margin-top: 30px; }
.kb-group-h {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 2px 12px; border-top: 1px solid #eaecf0; margin-bottom: 14px;
}
.kb-group-h i {
  font-style: normal; font-size: 13px; font-weight: 750; color: var(--brand);
  letter-spacing: 1px;
}
.kb-group-h b { font-size: 15.5px; font-weight: 750; }
.kb-group-h em {
  margin-left: auto; font-style: normal; font-size: 12.5px; color: #98a2b3;
}

.kb-cards { display: flex; flex-direction: column; gap: 12px; }
.kb-card {
  display: block; position: relative;
  border: 1px solid #e4e7ec; border-radius: 12px;
  padding: 15px 18px 14px; background: #fff; transition: .16s;
}
.kb-card:hover { border-color: #ddd6fe; box-shadow: 0 5px 16px rgba(16,24,40,.07); transform: translateY(-1px); }
.kb-card-n { font-style: normal; font-size: 11.5px; color: #98a2b3; font-variant-numeric: tabular-nums; }
.kb-card-t { display: block; font-size: 15.5px; font-weight: 650; margin: 3px 0 0; color: var(--ink); }
.kb-card-t u {
  text-decoration: none; font-size: 11px; font-weight: 600; color: var(--brand);
  background: var(--brand-weak); border-radius: 5px; padding: 2px 7px; margin-left: 8px;
  vertical-align: 2px; white-space: nowrap;
}
.kb-card-t u.u-lock { color: #8a5a1c; background: #fdf8ef; }
.kb-card-d {
  margin: 7px 0 0; font-size: 13px; color: #667085; line-height: 1.65;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.kb-card-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 10px; }
.kb-card-tags span {
  font-size: 11.5px; color: #475467; background: #f2f4f7;
  border-radius: 6px; padding: 3px 9px;
}
.kb-card.static { cursor: default; }
.kb-card.static:hover { transform: none; box-shadow: none; border-color: #e4e7ec; }
.kb-empty {
  border: 1px dashed #d0d5dd; border-radius: 12px; padding: 34px;
  text-align: center; color: #98a2b3; font-size: 13.5px;
}
.kb-empty a { color: var(--brand); font-weight: 600; }
.kb-more { display: inline-block; margin-top: 10px; font-size: 12.5px; color: var(--brand); font-weight: 600; }

/* ---------------- 阅读页 ---------------- */
.kb-art { max-width: 800px; }
.kb-art-h h1 { font-size: 25px; font-weight: 800; line-height: 1.4; margin: 0 0 12px; }
.kb-art-lede {
  margin: 16px 0 0; padding: 14px 18px;
  background: #f8f9fb; border-left: 3px solid var(--brand); border-radius: 0 10px 10px 0;
  color: #475467; font-size: 14px;
}
.kb-art-body { margin-top: 22px; font-size: 14.5px; color: #1d2939; }
.kb-art-body h2 { font-size: 19px; font-weight: 750; margin: 30px 0 12px; }
.kb-art-body h3 { font-size: 15.5px; font-weight: 700; margin: 22px 0 10px; }
.kb-art-body p { margin: 10px 0; }
.kb-art-body img { max-width: 100%; border-radius: 10px; border: 1px solid #e4e7ec; }
/* 正文中的内联 SVG 示意图：上面的 `body.dckb svg{18px}` 是给页面小图标配的，
   会把文章里的 SVG 图也压成小点，这里按更高优先级恢复原始尺寸（2026-11-04） */
body.dckb .kb-art-body svg,
.kb-rich svg {
  width: 100%; height: auto; max-width: 680px;
  display: block; margin: 0 auto;
  border: 1px solid #e4e7ec; border-radius: 10px;
}
body.dckb .kb-art-body figure { margin: 16px 0; }
body.dckb .kb-art-body figcaption {
  font-size: 12.5px; color: #667085; text-align: center; margin-top: 8px;
}
.kb-art-body blockquote {
  margin: 14px 0; padding: 10px 16px; background: #f8f9fb;
  border-left: 3px solid #d0d5dd; border-radius: 0 8px 8px 0; color: #475467;
}
.kb-art-body code { background: #f2f4f7; border-radius: 5px; padding: 1.5px 6px; font-size: 13px; }

.kb-pn { display: flex; justify-content: space-between; gap: 14px; margin-top: 34px; }
.kb-pn-a {
  flex: 1; max-width: 50%; border: 1px solid #e4e7ec; border-radius: 10px;
  padding: 12px 16px; transition: .15s;
}
.kb-pn-a:hover { border-color: #ddd6fe; }
.kb-pn-a span { display: block; font-size: 11.5px; color: #98a2b3; }
.kb-pn-a b { font-size: 13.5px; }
.kb-pn-a.next { text-align: right; margin-left: auto; }

/* ---------------- 锁定 / 付费墙 ---------------- */
.kb-lockbar {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  background: #fdf8ef; border: 1px solid #e8d5a8; border-radius: 10px;
  padding: 10px 16px; margin-bottom: 8px; font-size: 13px; color: #667085;
}
.kb-lockbar strong { color: #8a5a1c; }
.kb-paywall { margin: 26px 0 10px; }
.kb-pay-card {
  border: 1px solid #e8d5a8; background: linear-gradient(150deg,#fffdf7,#fbf4e4);
  border-radius: 14px; padding: 34px 30px; text-align: center; max-width: 560px;
}
.kb-pay-ic { font-size: 30px; display: block; margin-bottom: 10px; }
.kb-pay-card b { font-size: 16.5px; color: #344054; }
.kb-pay-card p { color: #667085; font-size: 13.5px; margin: 10px auto 18px; max-width: 420px; }
.kb-pay-acts { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }

.kb-blurbox { position: relative; margin-top: 14px; }
.kb-blur { filter: blur(6px); pointer-events: none; user-select: none; }
.kb-blur-in {
  position: absolute; inset: 0; z-index: 2;
  display: flex; align-items: center; justify-content: center; gap: 12px; flex-wrap: wrap;
  font-size: 13.5px; color: #475467; text-align: center; padding: 20px;
}
.kb-blur-in strong { color: #8a5a1c; }

/* ---------------- 工程流程页 ---------------- */
.kb-stage-blk { margin-top: 30px; }
.kb-stage-h { display: flex; align-items: center; gap: 14px; }
.kb-stage-h i {
  font-style: normal; font-size: 14px; font-weight: 800; color: var(--brand);
  background: var(--brand-weak); border-radius: 9px; padding: 7px 11px; letter-spacing: 1px;
}
.kb-stage-h b { font-size: 17px; font-weight: 750; display: block; }
.kb-stage-h small { font-size: 12px; color: #98a2b3; letter-spacing: .5px; }
.kb-stage-goal {
  margin: 12px 0 0; padding: 11px 16px;
  background: #f8f9fb; border-radius: 10px; color: #475467; font-size: 13.5px;
}
.kb-io { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 14px; }
.kb-io-col { border: 1px solid #e4e7ec; border-radius: 10px; padding: 13px 16px; }
.kb-io-col b { font-size: 12.5px; color: var(--brand); letter-spacing: 1px; }
.kb-io-col ul { margin: 8px 0 0; padding-left: 18px; }
.kb-io-col li { font-size: 13px; color: #475467; margin: 4px 0; }
.kb-deci { margin-top: 14px; border: 1px solid #e4e7ec; border-radius: 10px; padding: 13px 16px; }
.kb-deci > b { font-size: 12.5px; color: var(--brand); letter-spacing: 1px; }
.kb-deci-row { margin-top: 10px; }
.kb-deci-row p { margin: 0; font-size: 13.5px; font-weight: 600; color: var(--ink); }
.kb-deci-row span { display: block; font-size: 12.5px; color: #667085; margin-top: 3px; }
.kb-pit { margin-top: 14px; background: #fdf3f2; border: 1px solid #f2cfc9; border-radius: 10px; padding: 12px 16px; }
.kb-pit b { font-size: 12.5px; color: #b42318; }
.kb-pit ul { margin: 8px 0 0; padding-left: 18px; }
.kb-pit li { font-size: 13px; color: #7a271a; margin: 4px 0; }
.kb-stage-chs { margin-top: 14px; display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.kb-stage-chs b { font-size: 12.5px; color: #98a2b3; }
.kb-stage-chs a {
  font-size: 12.5px; color: var(--brand); font-weight: 600;
  border: 1px solid #ddd6fe; background: #f4faf9; border-radius: 20px; padding: 5px 12px;
}
.kb-stage-chs a:hover { background: var(--brand-weak); }

/* ---------------- 表格 ---------------- */
.kb-table {
  width: 100%; border-collapse: collapse; margin-top: 14px;
  font-size: 13px;
}
.kb-table th {
  text-align: left; font-weight: 700; color: #fff; letter-spacing: .02em;
  background: #14558c; border: 1px solid #124a7b; padding: 8px 12px; white-space: nowrap;
}
.kb-table td { border: 1px solid #e4e7ec; padding: 7.5px 12px; color: #344054; }
.kb-table tr:nth-child(even) td { background: #fcfcfd; }
.kb-table.slim { margin-top: 10px; }
.kb-twrap { overflow-x: auto; }

/* ---------------- 数据速查 tabs / 公式 / 术语 / 合金 ---------------- */
.kb-tabs { display: flex; gap: 6px; margin: 20px 0 4px; border-bottom: 1px solid #eaecf0; }
.kb-tabs a {
  position: relative; padding: 9px 14px; font-size: 13.5px; font-weight: 600;
  color: #667085; border-radius: 8px 8px 0 0;
}
.kb-tabs a:hover { color: var(--ink); }
.kb-tabs a.on { color: var(--brand); }
.kb-tabs a.on::after {
  content: ""; position: absolute; left: 10px; right: 10px; bottom: -1px;
  height: 2.5px; background: var(--brand); border-radius: 2px;
}
.kb-fexpr {
  margin: 12px 0 0; padding: 13px 16px;
  background: #f8f9fb; border: 1px solid #e4e7ec; border-radius: 9px;
  font-family: "Cambria Math", Georgia, serif; font-size: 15px; color: var(--ink);
  overflow-x: auto;
}
.kb-gloss { margin: 0; }
.kb-gloss-item { padding: 11px 4px; border-bottom: 1px solid #f2f4f7; }
.kb-gloss-item dt { font-size: 14px; font-weight: 650; color: var(--ink); }
.kb-gloss-item dt u {
  text-decoration: none; font-size: 11px; color: var(--brand);
  background: var(--brand-weak); border-radius: 5px; padding: 2px 7px; margin-left: 8px;
}
.kb-gloss-item dd { margin: 4px 0 0; font-size: 13px; color: #667085; }
.kb-alloys { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 14px; }
.kb-alloy { border: 1px solid #e4e7ec; border-radius: 12px; padding: 16px 18px; }
.kb-alloy > b { font-size: 15px; }
.kb-alloy-grid {
  display: grid; grid-template-columns: auto 1fr; gap: 5px 14px; margin-top: 10px;
  font-size: 13px;
}
.kb-alloy-grid .k { color: #98a2b3; }
.kb-alloy-grid .v { color: #344054; font-variant-numeric: tabular-nums; }

/* ---------------- 决策树 ---------------- */
.kb-dtree {
  border: 1px solid #e4e7ec; border-radius: 14px; padding: 26px;
  margin-top: 22px; background: #fff; min-height: 220px;
}
.dt-q small { display: block; font-size: 11.5px; color: var(--brand); font-weight: 700; letter-spacing: 1px; }
.dt-q b { display: block; font-size: 18px; font-weight: 750; margin-top: 6px; }
.dt-q p { color: #667085; font-size: 13px; margin: 8px 0 0; }
.dt-opts { display: flex; flex-direction: column; gap: 9px; margin-top: 18px; }
.dt-opt {
  display: flex; align-items: center; gap: 12px; text-align: left;
  border: 1px solid #e4e7ec; background: #fff; border-radius: 10px;
  padding: 12px 15px; font-size: 14px; color: #344054; cursor: pointer; transition: .14s;
  font-family: inherit;
}
.dt-opt:hover { border-color: var(--brand); background: #f4faf9; color: var(--ink); }
.dt-opt i {
  font-style: normal; font-size: 11.5px; font-weight: 750; color: var(--brand);
  background: var(--brand-weak); border-radius: 6px; padding: 4px 8px;
}
.dt-res small { display: block; font-size: 11.5px; color: var(--brand); font-weight: 700; letter-spacing: 1px; }
.dt-res > b { display: block; font-size: 20px; font-weight: 800; margin: 6px 0 10px; }
.dt-res p { font-size: 13.5px; color: #475467; margin: 8px 0; }
.dt-acts { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 14px; }
.dt-act { border: 1px solid #e4e7ec; border-radius: 10px; padding: 12px 15px; }
.dt-act b { font-size: 13px; color: var(--brand); }
.dt-act ul { margin: 8px 0 0; padding-left: 17px; }
.dt-act li { font-size: 12.5px; color: #475467; margin: 4px 0; }
.dt-nav { display: flex; gap: 10px; margin-top: 18px; }
.dt-nav button {
  border: 1px solid #d0d5dd; background: #fff; border-radius: 8px;
  padding: 7px 15px; font-size: 13px; font-weight: 600; color: #344054; cursor: pointer;
}
.dt-nav button:hover { border-color: var(--brand); color: var(--brand); }
.kb-dt-crumb { margin-top: 14px; font-size: 12px; color: #98a2b3; }

/* ---------------- 页脚 ---------------- */
.kb-foot {
  border-top: 1px solid #e7eaee; margin-top: 30px;
  padding: 22px 24px 30px; text-align: center;
  font-size: 12.5px; color: #98a2b3;
}
.kb-foot-links { margin-top: 6px; }
.kb-foot-links a:hover { color: var(--brand); }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1020px) {
  .kb-search { max-width: 300px; }
  .kb-menu a { padding: 8px 7px; font-size: 12.5px; }
  .kb-flow-grid { grid-template-columns: repeat(2, 1fr); }
  .kb-cat-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 780px) {
  .kb-top-inner { flex-wrap: wrap; height: auto; padding: 10px 16px; row-gap: 8px; }
  .kb-search { order: 3; max-width: none; flex-basis: 100%; }
  .kb-menu { margin-left: 0; }
  .kb-shell { flex-direction: column; padding: 0 16px; }
  .kb-side { position: static; width: 100%; max-height: none; padding-bottom: 6px; }
  .kb-main { padding-top: 6px; }
  .kb-flow-grid, .kb-cat-grid, .kb-io, .kb-acts, .dt-acts, .kb-alloys { grid-template-columns: 1fr; }
  .kb-hero h1 { font-size: 25px; }
  .kb-menu { overflow-x: auto; }
}

/* ---- 缺陷图鉴卡片实物照片 ---- */
.kb-card-def { overflow: hidden; }
.kb-card-ph { display: block; position: relative; margin: -2px -2px 12px; border-radius: 10px 10px 0 0; overflow: hidden; background: #0e1524; }
.kb-card-ph img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; transition: transform .25s; }
.kb-card:hover .kb-card-ph img { transform: scale(1.045); }
.kb-card-ph .ph-lock { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: 26px; background: rgba(10,14,24,.18); font-style: normal; text-decoration: none; }
.kb-card-ph.ph-locked img { filter: blur(7px) saturate(.75); transform: scale(1.06); }

/* ---- 视觉统一主站（2026-11-02）：active 主站式、logo 渐变、按钮形态 ---- */
.kb-logo { background: var(--grad); box-shadow: 0 3px 10px rgba(124,58,237,.35); }
.kb-menu a { border-radius: 8px; }
.kb-menu a:hover { color: var(--brand); background: var(--brand-weak); }
.kb-menu a.on { color: var(--brand); font-weight: 650; background: var(--brand-weak); }
.kb-menu a.on::after { display: none; }
.kb-user a:hover { color: var(--brand); }
.kb-btn, .kb-btn-line { border-radius: 8px; font-weight: 600; }
.kb-btn { background: var(--brand); border-color: var(--brand); }
.kb-btn:hover { background: #6d28d9; }
.kb-si.on { color: var(--brand); background: var(--brand-weak); }
.kb-si.on .kb-sic { color: var(--brand); }
.kb-gold { background: linear-gradient(135deg, #f59e0b, #d97706); }
.crumbs a:hover, .kb-note a { color: var(--brand); }

/* ---- 侧栏「继续学习」回站入口 ---- */
.kb-sg.kb-sg-more { margin-top: 6px; }
.kb-si.kb-ext .kb-sic { color: var(--muted); }
.kb-si.kb-ext:hover .kb-sic { color: var(--brand); }
.kb-side-cta { margin: 14px 10px 4px; padding: 12px 14px; border-radius: 12px;
  background: linear-gradient(135deg, #160a26, #331463 60%, #6d1a81); color: #fff; }
.kb-side-cta b { display: block; font-size: 13.5px; margin-bottom: 3px; }
.kb-side-cta p { margin: 0 0 9px; font-size: 12px; color: rgba(255,255,255,.72); line-height: 1.55; }
.kb-side-cta a { display: inline-flex; align-items: center; gap: 5px; font-size: 12.5px; font-weight: 600;
  color: #fff; text-decoration: none; background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.35);
  border-radius: 8px; padding: 6px 12px; margin: 0 6px 6px 0; transition: .15s; }
.kb-side-cta a:hover { background: rgba(255,255,255,.26); }

/* ---- v2 版式兼容（2026-11-02）：统一 v2-layout/hero.v2/v2-cards ---- */
.kb-main .page-hero.v2 { margin-top: 0; }
.kb-main .crumbs { display: none; }  /* 面包屑并入 hero */
.ph-emoji-svg svg { width: 96px; height: 96px; opacity: .9; }
.kb-cards.v2-cards { grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px; }
.v2-side .v2-side-card .btn { display: inline-block; margin-top: 4px; }
.v2-side .v2-side-link span { flex-shrink: 0; width: 20px; text-align: center; }
.v2-side .v2-side-link { justify-content: flex-start; }
.v2-cta h3::before { background: rgba(255,255,255,.75); }

/* ============================================================
   AI 问答（dckb/ask）—— 2026-11-02
   ============================================================ */
/* 入口：顶栏 + 侧栏强调 */
.kb-menu .kb-nav-ai { color: var(--brand); font-weight: 700; }
.kb-menu .kb-nav-ai.on { background: var(--brand-weak); }
.kb-si.kb-si-ai { color: var(--brand); font-weight: 650; }
.kb-si.kb-si-ai em { background: var(--brand-weak); color: var(--brand); }

/* 首页提问大卡 */
.kb-ask-hero {
  margin: 18px 0 6px; padding: 22px 24px 18px; border-radius: 18px;
  background: linear-gradient(135deg, #faf5ff 0%, #f5f3ff 45%, #eef2ff 100%);
  border: 1px solid #e9d5ff;
}
.kb-ask-hero .kah-l b { display: block; font-size: 18px; font-weight: 800; color: var(--ink); }
.kb-ask-hero .kah-l p { margin: 6px 0 14px; font-size: 13px; color: #667085; }
.kb-ask-hero .kah-form { display: flex; gap: 10px; }
.kb-ask-hero .kah-form input {
  flex: 1; height: 46px; padding: 0 16px; font-size: 14px; color: var(--ink);
  background: #fff; border: 1px solid #ddd6fe; border-radius: 12px; outline: 0;
  transition: .15s;
}
.kb-ask-hero .kah-form input:focus { border-color: var(--brand); box-shadow: 0 0 0 4px rgba(124,58,237,.12); }
.kb-ask-hero .kah-form button {
  flex-shrink: 0; height: 46px; padding: 0 22px; border: 0; border-radius: 12px;
  background: linear-gradient(135deg, #7c3aed, #6d28d9); color: #fff;
  font-size: 14px; font-weight: 700; cursor: pointer; transition: .15s;
}
.kb-ask-hero .kah-form button:hover { filter: brightness(1.06); }
.kb-ask-hero .kah-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.kb-ask-hero .kah-chips a {
  font-size: 12.5px; color: #5b21b6; background: #fff; border: 1px solid #e9d5ff;
  border-radius: 999px; padding: 5px 12px; transition: .15s;
}
.kb-ask-hero .kah-chips a:hover { border-color: var(--brand); color: var(--brand); }

/* 文章底部「就本篇提问」 */
.kb-art-ask {
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  margin: 22px 0 6px; padding: 14px 16px; border-radius: 12px;
  background: #faf5ff; border: 1px solid #e9d5ff;
}
.kb-art-ask b { display: block; font-size: 13.5px; }
.kb-art-ask span { font-size: 12.5px; color: #667085; }
.kb-art-ask .kb-btn { flex-shrink: 0; }

/* 右栏 AI 卡 */
.v2-side-card.v2-side-ai { background: linear-gradient(135deg, #faf5ff, #eef2ff); border-color: #e9d5ff; }
.v2-side-card.v2-side-ai h3 { color: #5b21b6; }

/* 问答页 */
.ask-hero .ph-sub { max-width: 780px; }
.kab-about {
  margin: 0 0 12px; padding: 10px 14px; border-radius: 10px; font-size: 13px;
  background: #faf5ff; border: 1px solid #e9d5ff; color: #5b21b6;
}
.kab-box { border: 1px solid #e7eaee; border-radius: 14px; padding: 16px 16px 12px; background: #fff; }
.kab-h { display: flex; align-items: baseline; gap: 10px; margin-bottom: 10px; }
.kab-h b { font-size: 14.5px; font-weight: 750; }
.kab-h span { font-size: 12px; color: #98a2b3; }
.kab-box textarea {
  width: 100%; box-sizing: border-box; resize: vertical; min-height: 76px;
  padding: 12px 14px; font: inherit; font-size: 14px; color: var(--ink);
  border: 1px solid #e4e7ec; border-radius: 10px; outline: 0; background: #fcfcfd;
  transition: .15s;
}
.kab-box textarea:focus { background: #fff; border-color: var(--brand); box-shadow: 0 0 0 3px rgba(124,58,237,.12); }
.kab-bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 10px; }
.kab-tip { font-size: 11.5px; color: #98a2b3; }
.kab-bar .kb-btn { border: 0; cursor: pointer; }
.kab-bar .kb-btn:disabled { opacity: .6; cursor: default; }
.kab-sug { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.kab-sug .kab-chip {
  font: inherit; font-size: 12.5px; color: #475467; background: #f8f9fb;
  border: 1px solid #e7eaee; border-radius: 999px; padding: 5px 12px; cursor: pointer; transition: .15s;
}
.kab-sug .kab-chip:hover { border-color: #ddd6fe; color: #5b21b6; background: #faf5ff; }
.kab-gate { margin-top: 12px; padding: 10px 12px; border-radius: 10px; font-size: 12.5px;
  background: #fff8e6; border: 1px solid #f5d9a0; color: #8a5a00; }
.kab-gate a { color: #7c3aed; font-weight: 650; }

.kab-out { margin-top: 16px; }
.kab-card { border: 1px solid #e7eaee; border-radius: 14px; padding: 16px; background: #fff; }
.kab-q { font-size: 14px; font-weight: 700; color: var(--ink); padding-left: 10px;
  border-left: 3px solid var(--brand); margin-bottom: 10px; }
.kab-a { font-size: 14px; line-height: 1.78; color: #1d2939; }
.kab-a b, .kab-a strong { font-weight: 700; }
.kab-loading .kab-think, .kab-err .kab-think { font-size: 13px; color: #98a2b3; }
.kab-err .kab-think { color: #b42318; }
.kab-note { margin-top: 10px; font-size: 12.5px; color: #8a5a00; background: #fff8e6;
  border: 1px solid #f5d9a0; border-radius: 8px; padding: 8px 10px; }
.kab-cites { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.kab-cites-t { font-size: 12px; color: #98a2b3; width: 100%; }
.kab-cite {
  display: inline-flex; align-items: baseline; gap: 4px; max-width: 100%;
  font-size: 12px; color: #5b21b6; background: #faf5ff; border: 1px solid #e9d5ff;
  border-radius: 8px; padding: 4px 9px; text-decoration: none; transition: .15s;
}
.kab-cite:hover { border-color: var(--brand); background: #f3e8ff; }
.kab-cite i { font-style: normal; color: #8b5cf6; }
.kab-foot { margin-top: 12px; font-size: 11.5px; color: #98a2b3; }

.kab-hist { display: flex; flex-direction: column; gap: 8px; }
.kab-hi { border: 1px solid #e7eaee; border-radius: 10px; padding: 10px 14px; background: #fff; }
.kab-hi summary { display: flex; align-items: center; justify-content: space-between; gap: 12px;
  cursor: pointer; list-style: none; }
.kab-hi summary::-webkit-details-marker { display: none; }
.kab-hq { font-size: 13.5px; font-weight: 650; color: #1d2939; }
.kab-hi time { font-size: 11.5px; color: #98a2b3; flex-shrink: 0; }
.kab-hb { margin-top: 10px; font-size: 13px; line-height: 1.75; color: #475467;
  border-top: 1px dashed #eaecf0; padding-top: 10px; }