/* =========================================================
   鉴别手册 · 二级页样式
   与主站共用 styles.css 的变量：白卡片、发丝线、#0071e3 主蓝
   ========================================================= */

html { scroll-behavior: smooth; }

/* ---------------- 手册页头 ---------------- */
.hero-guide { padding: 54px 22px 38px; }
.hero-guide h1 { font-size: 40px; letter-spacing: -0.024em; }
.hero-guide .hero-sub {
  margin-top: 12px;
  font-size: 15px;
  color: var(--muted);
}
.guide-disclaimer,
.hero-guide .guide-disclaimer {
  margin-top: 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--gray);
}

.guide-main {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 22px 64px;
}

.guide-layout {
  display: grid;
  grid-template-columns: 204px minmax(0, 1fr);
  gap: 46px;
  align-items: start;
}

/* ---------------- 左侧目录 ---------------- */
.guide-toc {
  position: sticky;
  top: 68px;
  padding-top: 4px;
}
.guide-toc-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--gray);
  margin: 0 0 10px 12px;
  text-transform: uppercase;
}
.guide-toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
}
.guide-toc a {
  display: block;
  padding: 7px 12px;
  border-left: 2px solid transparent;
  border-radius: 0 7px 7px 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.16s, background 0.16s;
}
.guide-toc a:hover {
  color: var(--ink);
  background: rgba(0, 0, 0, 0.035);
}
.guide-toc a.on {
  color: var(--blue);
  border-left-color: var(--blue);
  background: var(--blue-tint);
  font-weight: 500;
}
.guide-toc .toc-num {
  display: inline-block;
  min-width: 17px;
  margin-right: 6px;
  font-variant-numeric: tabular-nums;
  color: var(--gray);
  font-size: 11px;
}
.guide-toc a.on .toc-num { color: var(--blue); }

/* ---------------- 配图 ---------------- */
.guide-fig {
  margin: 22px 0 24px;
  padding: 0;
}
.guide-fig svg {
  display: block;
  width: 100%;
  height: auto;
  background: #fafafa;
  border: 1px solid var(--hairline);
  border-radius: 12px;
}
.guide-fig figcaption {
  margin-top: 9px;
  font-size: 12px;
  line-height: 1.68;
  color: var(--gray);
}
.guide-fig text {
  font-family: var(--font);
  font-size: 11px;
  fill: #86868b;
}
.guide-fig .fg-t { font-size: 12.5px; fill: #1d1d1f; font-weight: 500; }
.guide-fig .fg-n { font-size: 11px; fill: #6e6e73; }
.guide-fig .fg-b { fill: #0071e3; }
.guide-fig .fg-g { fill: #1d8f45; }
.guide-fig .fg-r { fill: #d92b25; }
.guide-fig .fg-w { fill: #ffffff; }

/* ---------------- 正文 ---------------- */
.guide-body { min-width: 0; }

.guide-article {
  background: var(--card);
  border-radius: var(--radius);
  padding: 36px 40px 32px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.045);
  scroll-margin-top: 74px;
}
.guide-article + .guide-article { margin-top: 20px; }

.guide-num {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 20px;
  background: var(--blue-tint);
  color: var(--blue);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.03em;
  margin-bottom: 13px;
}

.guide-article h2 {
  margin: 0;
  font-size: 25px;
  font-weight: 700;
  letter-spacing: -0.021em;
  line-height: 1.28;
  color: var(--ink);
}

.guide-lead {
  margin: 10px 0 26px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--hairline);
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.guide-article h3 {
  margin: 28px 0 9px;
  font-size: 15.5px;
  font-weight: 600;
  letter-spacing: -0.008em;
  color: var(--ink);
}
.guide-article h3:first-of-type { margin-top: 0; }

.guide-article p {
  margin: 0 0 13px;
  font-size: 15px;
  line-height: 1.86;
  color: #37373a;
}
.guide-article p:last-child { margin-bottom: 0; }

.guide-article b { font-weight: 600; color: var(--ink); }

.guide-article ul,
.guide-article ol {
  margin: 0 0 15px;
  padding-left: 21px;
}
.guide-article li {
  margin: 0 0 7px;
  font-size: 15px;
  line-height: 1.82;
  color: #37373a;
}
.guide-article li:last-child { margin-bottom: 0; }
.guide-article ul li::marker { color: #b0b0b8; }

/* 关键结论 / 风险提示 */
.guide-key,
.guide-warn {
  margin: 20px 0 6px;
  padding: 14px 16px;
  border-radius: 12px;
  font-size: 14px;
  line-height: 1.78;
}
.guide-key { background: var(--blue-tint); color: #0a3d70; }
.guide-key b { color: #062f58; }
.guide-warn { background: #fff6e6; color: #6f4708; }
.guide-warn b { color: #54350a; }
.guide-key p,
.guide-warn p { margin: 0; font-size: 14px; line-height: 1.78; color: inherit; }

/* 表格 */
.guide-table-wrap {
  margin: 4px 0 18px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--hairline);
  border-radius: 12px;
}
.guide-table {
  width: 100%;
  min-width: 540px;
  border-collapse: collapse;
  font-size: 13px;
}
.guide-table th {
  padding: 9px 12px;
  text-align: left;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--muted);
  background: #fafafa;
  border-bottom: 1px solid var(--hairline);
  white-space: nowrap;
}
.guide-table td {
  padding: 9px 12px;
  color: #37373a;
  border-bottom: 1px solid var(--hairline);
  vertical-align: top;
}
.guide-table tbody tr:last-child td { border-bottom: none; }
.guide-table td:first-child { color: var(--ink); font-weight: 500; white-space: nowrap; }
.guide-table td:nth-child(2),
.guide-table td:nth-child(3),
.guide-table td:nth-child(4) { white-space: nowrap; }

.guide-cap {
  margin: -8px 0 18px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--gray);
}

/* 小结清单 */
.guide-check {
  list-style: none;
  padding: 0;
  margin: 0 0 6px;
  counter-reset: gk;
}
.guide-check li {
  position: relative;
  padding-left: 34px;
  margin-bottom: 14px;
  counter-increment: gk;
}
.guide-check li::before {
  content: counter(gk);
  position: absolute;
  left: 0;
  top: 1px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--blue-tint);
  color: var(--blue);
  font-size: 11.5px;
  font-weight: 600;
  display: grid;
  place-items: center;
}

/* 页尾回到首页 */
.guide-foot-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 20px;
  padding: 22px 26px;
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.045);
  text-decoration: none;
  transition: transform 0.16s, box-shadow 0.16s;
}
.guide-foot-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
}
.guide-foot-cta b {
  display: block;
  font-size: 15px;
  color: var(--ink);
  margin-bottom: 3px;
}
.guide-foot-cta span {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
}
.guide-foot-cta .arrow {
  font-size: 20px;
  color: var(--blue);
  flex: none;
}

/* ---------------- 窄屏：目录转顶部条 ---------------- */
@media (max-width: 880px) {
  .guide-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }
  .guide-toc {
    position: sticky;
    top: 46px;
    z-index: 30;
    margin: 0 -22px;
    padding: 9px 22px;
    background: rgba(245, 245, 247, 0.94);
    -webkit-backdrop-filter: saturate(180%) blur(14px);
    backdrop-filter: saturate(180%) blur(14px);
    border-bottom: 1px solid var(--hairline);
  }
  .guide-toc-title { display: none; }
  .guide-toc ol {
    display: flex;
    gap: 7px;
    overflow-x: auto;
    scrollbar-width: none;
  }
  .guide-toc ol::-webkit-scrollbar { display: none; }
  .guide-toc a {
    flex: none;
    padding: 6px 13px;
    border-left: none;
    border-radius: 20px;
    background: var(--card);
    white-space: nowrap;
    font-size: 12.5px;
  }
  .guide-toc .toc-num { display: none; }
  .guide-article { padding: 26px 20px 24px; scroll-margin-top: 104px; }
  .guide-article h2 { font-size: 21px; }
}

@media (max-width: 560px) {
  .guide-main { padding: 0 14px 48px; }
  .guide-toc { margin: 0 -14px; padding: 9px 14px; }
  .guide-foot-cta { padding: 18px 18px; }
  .hero-guide { padding: 34px 18px 26px; }
  .hero-guide h1 { font-size: 30px; }
  .hero-guide .hero-sub { font-size: 14px; margin-top: 9px; }
  .hero-guide .guide-disclaimer { margin-top: 10px; font-size: 11.5px; }
  .guide-article h2 { font-size: 20px; }
  .guide-lead { margin-bottom: 22px; padding-bottom: 18px; }
  /* 图内文字按 680 宽的坐标系绘制，窄屏缩太小 → 保底宽度 + 横向滑动 */
  .fig-scroll {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .fig-scroll svg { min-width: 540px; }
  .guide-fig figcaption::before {
    content: "↔ 可左右滑动　";
    color: var(--blue);
  }
}

/* =========================================================
   单篇独立页（guide/*.html）与篇目总览页（guide.html）
   ========================================================= */

/* ---------------- 面包屑 ---------------- */
.guide-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0 0 16px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--gray);
}
.guide-crumb a { color: var(--muted); text-decoration: none; }
.guide-crumb a:hover { color: var(--blue); }
.guide-crumb .sep { color: #c7c7cc; }
.guide-crumb .cur { color: var(--ink); }

.hero-guide.hero-article { padding: 42px 22px 32px; }
.hero-guide.hero-article h1 { font-size: 34px; }

/* 侧栏底部「篇目总览」 */
.guide-toc-all {
  display: block;
  margin: 14px 0 0 12px;
  font-size: 12px;
  color: var(--blue);
  text-decoration: none;
}
.guide-toc-all:hover { text-decoration: underline; }

/* ---------------- 上一篇 / 下一篇 ---------------- */
.guide-pager {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 20px;
}
.guide-pager-item {
  display: block;
  padding: 15px 18px 16px;
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.045);
  text-decoration: none;
  transition: transform 0.16s, box-shadow 0.16s;
}
.guide-pager-item:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
}
.guide-pager-item span {
  display: block;
  margin-bottom: 5px;
  font-size: 11.5px;
  color: var(--gray);
  letter-spacing: 0.03em;
}
.guide-pager-item b {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
}
.guide-pager-item.next { text-align: right; }
.guide-pager-item.only { grid-column: 1 / -1; }

/* ---------------- 总览页卡片 ---------------- */
.guide-hub {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  max-width: 980px;
  margin: 0 auto;
  padding: 0 22px 64px;
}
.guide-hub-card {
  display: flex;
  flex-direction: column;
  padding: 26px 28px 22px;
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.045);
  text-decoration: none;
  transition: transform 0.16s, box-shadow 0.16s;
}
/* flex 子项默认 stretch，会把胶囊撑成整条色带 */
.guide-hub-card .guide-num { align-self: flex-start; }
/* 奇数张时最后一张横跨整行，避免右下留一个大缺口 */
.guide-hub-card:last-child:nth-child(odd) { grid-column: 1 / -1; }
.guide-hub-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.09);
}
.guide-hub-card h2 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--ink);
}
.guide-hub-card p {
  margin: 0 0 16px;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--muted);
}
.guide-hub-card .hub-go {
  margin-top: auto;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--blue);
}
.guide-hub-card .hub-go i {
  font-style: normal;
  margin-left: 2px;
  transition: margin-left 0.16s;
}
.guide-hub-card:hover .hub-go i { margin-left: 6px; }

@media (max-width: 760px) {
  .guide-hub { grid-template-columns: minmax(0, 1fr); padding: 0 14px 48px; }
}

@media (max-width: 880px) {
  /* 必须带 .guide-toc 前缀，否则被 .guide-toc a{display:block}（0,1,1）压掉 */
  .guide-toc .guide-toc-all { display: none; }
  .guide-pager-item { padding: 13px 15px 14px; }
  .guide-pager-item b { font-size: 13.5px; }
  .hero-guide.hero-article { padding: 30px 22px 26px; }
  .hero-guide.hero-article h1 { font-size: 26px; }
}

@media (max-width: 560px) {
  .guide-crumb { font-size: 11.5px; margin-bottom: 12px; }
  .hero-guide.hero-article { padding: 24px 18px 22px; }
  .hero-guide.hero-article h1 { font-size: 23px; }
  .guide-pager { gap: 10px; }
  .guide-pager-item span { font-size: 11px; }
  .guide-pager-item b { font-size: 12.5px; }
  .guide-hub-card { padding: 22px 20px 18px; }
  .guide-hub-card h2 { font-size: 17px; }
}