/* ==========================================================================
   VPNNK — deepdoc.css
   AI 工具指南页(knowledge.html)专属排版:页首信息行、正文节奏、
   工具卡网格、步骤列表、自查清单。全部取值走 base.css 设计令牌。
   ========================================================================== */

/* ------------------------------ 页首 ------------------------------ */
.doc-head { padding-top: 40px; padding-bottom: 26px; }
.doc-head h1 { max-width: 24ch; margin-top: 14px; }
.doc-head .lede { margin-top: 14px; font-size: 17px; }

.doc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  margin-top: 18px;
  font-size: 13px;
  color: var(--text-muted);
}
.doc-meta span { display: inline-flex; align-items: center; gap: 6px; }
.doc-meta span::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  flex: 0 0 auto;
}

/* ------------------------------ 正文节奏 ------------------------------ */
.doc-body { padding-top: 34px; }
.doc-body section + section { margin-top: 56px; }
.doc-body h2 { margin: 0; }
.doc-body h3 { margin-top: 32px; font-size: 20px; letter-spacing: -.02em; }
.doc-body h4 { margin-top: 22px; }
.doc-body p { margin-top: 14px; }
.doc-body ul,
.doc-body ol,
.doc-body pre,
.doc-body .table-scroll,
.doc-body .callout,
.doc-body .faq,
.doc-body .doc-tools,
.doc-body .promo-block { margin-top: 18px; }
.doc-body .sec-head + p { margin-top: 0; }
.doc-body .doc-tools + .promo-block { margin-top: 40px; }

/* 正文行内链接:与正文有明确区分,但不抢主按钮的视觉权重 */
.doc-body p a,
.doc-body li a,
.doc-body .callout a,
.doc-lead a {
  color: var(--accent-dark);
  text-decoration: underline;
  text-decoration-color: var(--accent-line);
  text-underline-offset: 3px;
}
.doc-body p a:hover,
.doc-body li a:hover,
.doc-body .callout a:hover,
.doc-lead a:hover { color: var(--accent); }

/* 行内代码(不含 pre 内) */
.doc-body p code,
.doc-body li code {
  background: var(--bg-panel-2);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: .88em;
  color: var(--text);
}

/* ------------------------------ 导语面板 ------------------------------ */
.doc-lead {
  margin-top: 6px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-m) var(--radius-m) 0;
  padding: 20px 22px;
  font-size: 15.5px;
  color: var(--text-muted);
  max-width: 100%;
}
.doc-lead p + p { margin-top: 10px; }
.doc-lead b { color: var(--text); font-weight: 600; }

/* ------------------------------ 项目符号列表 ------------------------------ */
.doc-list { display: flex; flex-direction: column; gap: 9px; }
.doc-list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  color: var(--text-muted);
}
.doc-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: .68em;
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--accent);
}
.doc-list li b { color: var(--text); font-weight: 600; }

/* ------------------------------ 编号步骤 ------------------------------ */
.steps {
  counter-reset: docstep;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.steps > li {
  position: relative;
  padding-left: 46px;
  min-height: 32px;
}
.steps > li::before {
  counter-increment: docstep;
  content: counter(docstep);
  position: absolute;
  left: 0;
  top: 0;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-s);
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
}
.steps > li b { display: block; font-size: 15.5px; font-weight: 700; color: var(--text); }
.steps > li p { margin-top: 5px; font-size: 14.5px; color: var(--text-muted); max-width: 62ch; }

/* ------------------------------ 自查清单 ------------------------------ */
.checklist {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 22px;
}
.checklist li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14.5px;
  color: var(--text-muted);
}
.checklist svg {
  width: 16px;
  height: 16px;
  margin-top: 4px;
  stroke: var(--success);
  fill: none;
  stroke  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: 0 0 auto;
}

/* ------------------------------ 继续阅读卡片网格 ------------------------------ */
.doc-tools {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.doc-tools > * { min-width: 0; }
.doc-tool {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
  transition: transform .2s ease, box-shadow .2s ease;
}
.doc-tool:hover { transform: translateY(-2px); box-shadow: var(--shadow-soft); }
.doc-tool h3 { margin-top: 0; font-size: 16.5px; letter-spacing: -.015em; }
.doc-tool p { margin-top: 0; font-size: 14px; color: var(--text-muted); }
.doc-tool .link-arrow { margin-top: auto; font-size: 14px; }

/* ------------------------------ 代码块微调 ------------------------------ */
.doc-body pre { margin-top: 18px; }
.doc-body pre + p { margin-top: 16px; }

/* ------------------------------ 表格与正文的呼吸 ------------------------------ */
.doc-body .table-scroll + h3 { margin-top: 34px; }
.doc-body .callout + h3 { margin-top: 30px; }
.doc-body .faq + h3 { margin-top: 34px; }

/* ------------------------------ 响应式 ------------------------------ */
@media (max-width: 900px) {
  .doc-tools { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 768px) {
  .doc-head { padding-top: 28px; padding-bottom: 20px; }
  .doc-head .lede { font-size: 16px; }
  .doc-body { padding-top: 24px; }
  .doc-body section + section { margin-top: 44px; }
  .doc-body h3 { margin-top: 26px; font-size: 19px; }
  .doc-lead { padding: 16px 18px; font-size: 15px; }
  .steps > li { padding-left: 40px; }
  .steps > li::before { width: 27px; height: 27px; font-size: 12.5px; }
  .checklist { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 640px) {
  .doc-tools { grid-template-columns: minmax(0, 1fr); }
  .doc-meta { gap: 5px 14px; font-size: 12.5px; }
  .doc-list li { font-size: 14.5px; }
  .steps > li b { font-size: 15px; }
  .steps > li p { font-size: 14px; }
}