/* =========================================================
   用 Agent 写脚本 · 站点样式
   ========================================================= */

:root {
  --bg: #ffffff;
  --bg-soft: #f6f7f9;
  --bg-code: #fafbfc;
  --ink: #16191d;
  --ink-2: #4c545e;
  --ink-3: #858d97;
  --line: #e7e9ed;
  --line-strong: #d7dbe2;
  --accent: #3a63f0;
  --accent-dark: #2b4fd8;
  --accent-soft: #eef2ff;
  --ok-bg: #f1faf4;
  --ok-line: #cfe9d9;
  --ok-ink: #1d5c39;
  --warn-bg: #fff9ef;
  --warn-line: #f3e0bb;
  --warn-ink: #7a5210;
  --bad-bg: #fff7f6;
  --bad-line: #f4d8d3;
  --bad-ink: #8a3125;
  --radius: 14px;
  --shadow: 0 10px 30px -18px rgba(16, 28, 60, .35);
  --max: 1240px;
  --mono: ui-monospace, SFMono-Regular, "Cascadia Code", "JetBrains Mono", Consolas, "Liberation Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.78;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dark); }

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 60;
  height: 64px;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  max-width: var(--max);
  height: 100%;
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 700;
  font-size: 15.5px;
  letter-spacing: -.01em;
  white-space: nowrap;
}

.brand:hover { color: var(--ink); }

.brand-mark {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: linear-gradient(140deg, #4d76ff 0%, #2b4fd8 100%);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 14px;
  font-weight: 800;
  box-shadow: 0 4px 12px -4px rgba(58, 99, 240, .6);
}

.nav {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: auto;
  overflow-x: auto;
  scrollbar-width: none;
}

.nav::-webkit-scrollbar { display: none; }

.nav a {
  padding: 7px 13px;
  border-radius: 9px;
  color: var(--ink-2);
  font-size: 14.5px;
  white-space: nowrap;
  transition: background .16s, color .16s;
}

.nav a:hover { background: var(--bg-soft); color: var(--ink); }

.nav a.active {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}

/* ---------- 布局 ---------- */
.layout {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
  display: grid;
  grid-template-columns: 228px minmax(0, 1fr);
  gap: 64px;
}

.layout.single { grid-template-columns: 1fr; gap: 0; }

.layout.single main { padding-top: 0; }

.side {
  position: sticky;
  top: 88px;
  align-self: start;
  max-height: calc(100vh - 110px);
  overflow-y: auto;
  padding: 44px 0 60px;
}

.side h4 {
  margin: 0 0 10px;
  padding: 0 12px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--ink-3);
  text-transform: uppercase;
}

.side a {
  display: block;
  padding: 6px 12px;
  margin-bottom: 1px;
  border-left: 2px solid transparent;
  border-radius: 0 8px 8px 0;
  color: var(--ink-2);
  font-size: 14px;
  line-height: 1.6;
  transition: all .15s;
}

.side a:hover { background: var(--bg-soft); color: var(--ink); }

.side a.active {
  border-left-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}

.side .side-cta {
  margin-top: 28px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg-soft);
}

.side .side-cta p {
  margin: 0 0 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-2);
}

.side .side-cta a {
  display: inline-block;
  padding: 7px 14px;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
}

.side .side-cta a:hover { background: var(--accent-dark); color: #fff; }

main {
  min-width: 0;
  padding: 44px 0 110px;
}

.prose { max-width: 820px; }

/* ---------- 首屏 ---------- */
.hero {
  max-width: 880px;
  padding: 56px 0 44px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--ink-2);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .02em;
}

.eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #23b26d;
  box-shadow: 0 0 0 3px rgba(35, 178, 109, .15);
}

.hero h1 {
  margin: 20px 0 18px;
  font-size: clamp(30px, 4.4vw, 46px);
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: -.025em;
}

.hero h1 em {
  font-style: normal;
  background: linear-gradient(100deg, #3a63f0 0%, #7a5cf0 60%, #b04ce0 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero > p {
  max-width: 640px;
  margin: 0 0 28px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink-2);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: all .16s;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 8px 20px -10px rgba(58, 99, 240, .8);
}

.btn-primary:hover { background: var(--accent-dark); color: #fff; transform: translateY(-1px); }

.btn-ghost {
  background: #fff;
  border-color: var(--line-strong);
  color: var(--ink);
}

.btn-ghost:hover { background: var(--bg-soft); color: var(--ink); border-color: #c3c9d3; }

.hero-meta {
  margin-top: 34px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 26px;
  font-size: 13.5px;
  color: var(--ink-3);
}

.hero-meta b { color: var(--ink); font-weight: 600; }

/* ---------- 标题 ---------- */
h2 {
  margin: 64px 0 16px;
  font-size: 25px;
  line-height: 1.4;
  font-weight: 700;
  letter-spacing: -.015em;
  scroll-margin-top: 88px;
}

h2:first-child { margin-top: 0; }

.page-head + h2 { margin-top: 0; }

h2 .num {
  display: inline-block;
  margin-right: 10px;
  color: var(--accent);
  font-size: 15px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  vertical-align: 2px;
}

h3 {
  margin: 34px 0 10px;
  font-size: 17.5px;
  line-height: 1.5;
  font-weight: 650;
  letter-spacing: -.005em;
  scroll-margin-top: 88px;
}

h4 { font-size: 15px; margin: 22px 0 8px; font-weight: 650; }

p { margin: 0 0 16px; }

ul, ol { margin: 0 0 18px; padding-left: 22px; }

li { margin-bottom: 7px; }

li::marker { color: var(--ink-3); }

strong { font-weight: 650; color: var(--ink); }

hr {
  margin: 48px 0;
  border: 0;
  border-top: 1px solid var(--line);
}

/* ---------- 页面头部 ---------- */
.page-head {
  padding: 12px 0 34px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 38px;
}

.page-head h1 {
  margin: 8px 0 12px;
  font-size: clamp(27px, 3.4vw, 36px);
  line-height: 1.28;
  font-weight: 800;
  letter-spacing: -.02em;
}

.page-head > p {
  max-width: 680px;
  margin: 0;
  color: var(--ink-2);
  font-size: 16px;
}

.crumb {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--accent);
  text-transform: uppercase;
}

/* ---------- 卡片 ---------- */
.grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fill, minmax(238px, 1fr));
  margin: 22px 0 30px;
}

.grid-2 { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }

.card {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  transition: border-color .18s, box-shadow .18s, transform .18s;
}

.card:hover {
  border-color: #ccd4e4;
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

a.card { color: inherit; }

a.card:hover { color: inherit; }

.card h4 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 650;
}

.card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-2);
}

.card .ico {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 12px;
  border-radius: 10px;
  background: var(--accent-soft);
  font-size: 16px;
}

/* ---------- 步骤 ---------- */
.steps { counter-reset: step; margin: 22px 0 30px; }

.step {
  position: relative;
  padding-left: 52px;
  padding-bottom: 24px;
  counter-increment: step;
}

.step:last-child { padding-bottom: 0; }

.step::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 1px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  display: grid;
  place-items: center;
  font-size: 14px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.step::after {
  content: "";
  position: absolute;
  left: 15.5px;
  top: 38px;
  bottom: 6px;
  width: 1px;
  background: var(--line);
}

.step:last-child::after { display: none; }

.step h3 { margin: 3px 0 8px; font-size: 17px; }

.step p:last-child { margin-bottom: 0; }

/* ---------- 提示块 ---------- */
.callout {
  display: flex;
  gap: 12px;
  margin: 22px 0;
  padding: 15px 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg-soft);
  font-size: 14.5px;
  line-height: 1.7;
}

.callout .c-ico {
  flex: none;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 800;
  color: #fff;
  background: var(--ink-3);
}

.callout > div { min-width: 0; }

.callout p { margin: 0; }

.callout p + p { margin-top: 8px; }

.callout strong { color: inherit; font-weight: 700; }

.callout.tip { background: var(--ok-bg); border-color: var(--ok-line); color: var(--ok-ink); }
.callout.tip .c-ico { background: #23a05f; }

.callout.warn { background: var(--warn-bg); border-color: var(--warn-line); color: var(--warn-ink); }
.callout.warn .c-ico { background: #d99413; }

.callout.info { background: var(--accent-soft); border-color: #d9e2fd; color: #1f3f8f; }
.callout.info .c-ico { background: var(--accent); }

.callout.danger { background: var(--bad-bg); border-color: var(--bad-line); color: var(--bad-ink); }
.callout.danger .c-ico { background: #d0453a; }

.callout code { background: rgba(0, 0, 0, .06); color: inherit; }

/* ---------- 代码 / 可复制需求 ---------- */
code {
  padding: 2px 6px;
  border-radius: 5px;
  background: #f1f3f6;
  color: #2b3a4a;
  font-family: var(--mono);
  font-size: .88em;
}

pre {
  margin: 18px 0;
  padding: 18px;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg-code);
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.72;
  color: #26303a;
}

pre code { padding: 0; background: none; font-size: inherit; color: inherit; }

.copy {
  margin: 20px 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg-code);
  overflow: hidden;
}

.copy-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 14px;
  background: #fff;
  border-bottom: 1px solid var(--line);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink-3);
  letter-spacing: .02em;
}

.copy-btn {
  padding: 4px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  background: #fff;
  color: var(--ink-2);
  font-family: inherit;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all .15s;
}

.copy-btn:hover { border-color: var(--accent); color: var(--accent); }

.copy-btn.done { border-color: #23a05f; background: var(--ok-bg); color: var(--ok-ink); }

.copy pre {
  margin: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  white-space: pre-wrap;
  word-break: break-word;
}

/* ---------- 对比 ---------- */
.compare {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr 1fr;
  margin: 20px 0 26px;
}

.compare > div {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  font-size: 14.5px;
  line-height: 1.7;
}

.compare h4 {
  display: flex;
  align-items: center;
  gap: 7px;
  margin: 0 0 9px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .02em;
}

.compare p { margin: 0; color: var(--ink-2); }

.compare .bad { background: var(--bad-bg); border-color: var(--bad-line); }
.compare .bad h4 { color: var(--bad-ink); }
.compare .good { background: var(--ok-bg); border-color: var(--ok-line); }
.compare .good h4 { color: var(--ok-ink); }

/* ---------- 表格 ---------- */
.table-wrap {
  margin: 20px 0 26px;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow-x: auto;
}

table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 14.5px;
}

th {
  padding: 11px 16px;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--line);
  color: var(--ink-2);
  font-size: 13px;
  font-weight: 650;
  text-align: left;
  white-space: nowrap;
}

td {
  padding: 11px 16px;
  border-top: 1px solid var(--line);
  vertical-align: top;
  line-height: 1.65;
}

tbody tr:first-child td { border-top: 0; }

tbody tr:hover { background: #fcfcfd; }

/* ---------- 标签 ---------- */
.tag {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.tag.gray { background: var(--bg-soft); color: var(--ink-2); }
.tag.green { background: var(--ok-bg); color: var(--ok-ink); }
.tag.orange { background: var(--warn-bg); color: var(--warn-ink); }

.kbd {
  display: inline-block;
  padding: 1px 7px;
  border: 1px solid #d5dae1;
  border-bottom-width: 2px;
  border-radius: 6px;
  background: #fff;
  color: var(--ink-2);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.6;
}

/* ---------- FAQ ---------- */
.faq {
  margin: 10px 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  overflow: hidden;
  transition: border-color .18s, box-shadow .18s;
}

.faq[open] { border-color: #ccd4e4; box-shadow: 0 8px 24px -20px rgba(16, 28, 60, .5); }

.faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 18px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 650;
  list-style: none;
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary::after {
  content: "+";
  flex: none;
  color: var(--ink-3);
  font-size: 19px;
  font-weight: 400;
  line-height: 1;
}

.faq[open] summary::after { content: "−"; color: var(--accent); }

.faq .faq-body {
  padding: 0 18px 16px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-2);
}

.faq .faq-body p:last-child { margin-bottom: 0; }

/* ---------- 图示 ---------- */
.figure {
  margin: 26px 0 30px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #fbfcfe 0%, #f7f9fc 100%);
}

.figure svg { display: block; width: 100%; height: auto; }

.figure figcaption {
  margin-top: 12px;
  text-align: center;
  font-size: 12.5px;
  color: var(--ink-3);
}

/* ---------- 案例卡 ---------- */
.case {
  margin: 28px 0;
  padding: 24px 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.case > header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 14px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.case > header h3 { margin: 0; font-size: 18px; }

.case .case-meta {
  margin-left: auto;
  font-size: 12.5px;
  color: var(--ink-3);
}

.case dl { margin: 0 0 6px; }

.case dt {
  margin: 14px 0 4px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .03em;
  color: var(--ink-3);
  text-transform: uppercase;
}

.case dd { margin: 0; font-size: 14.5px; color: var(--ink-2); }

.case ul { margin-bottom: 0; }

/* ---------- 底部 ---------- */
.pager {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr 1fr;
  margin-top: 72px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
}

.pager a {
  display: block;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--ink);
  transition: all .16s;
}

.pager a:hover { border-color: var(--accent); background: var(--accent-soft); color: var(--ink); }

.pager .p-label { display: block; font-size: 12px; color: var(--ink-3); margin-bottom: 3px; }
.pager .p-title { font-size: 15px; font-weight: 650; }
.pager .next { text-align: right; }

.site-foot {
  margin-top: 40px;
  padding: 28px;
  border-top: 1px solid var(--line);
  text-align: center;
  font-size: 13px;
  color: var(--ink-3);
}

.site-foot p { margin: 0 0 6px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .layout { grid-template-columns: 1fr; gap: 0; }
  .side { display: none; }
  .prose, .hero { max-width: none; }
}

@media (max-width: 760px) {
  .topbar-inner { padding: 0 18px; gap: 16px; }
  .layout { padding: 0 18px; }
  .brand span.brand-text { display: none; }
  .nav a { padding: 7px 10px; font-size: 13.5px; }
  .hero { padding: 38px 0 32px; }
  .hero-meta { gap: 16px; font-size: 12.5px; }
  .compare { grid-template-columns: 1fr; }
  .pager { grid-template-columns: 1fr; }
  .pager .next { text-align: left; }
  .case { padding: 18px; }
  .figure { padding: 14px; }
  h2 { margin-top: 48px; font-size: 22px; }
  main { padding: 28px 0 70px; }
}

@media print {
  .topbar, .side, .pager, .site-foot, .copy-btn { display: none; }
  .layout { display: block; }
  body { font-size: 12pt; }
}