/* ============================================================
   czagent 产品站 · 全站样式
   设计 token：亮色纸面 + 琥珀强调；会话窗口/代码块保留深色岛；零外部资源
   ============================================================ */

:root {
  color-scheme: light;
  --bg: #f3f5f0;
  --panel: #fbfcfa;
  --panel-2: #edf1ea;
  --line: #d8dfd3;
  --line-soft: #e4e9df;
  --text: #1d2721;
  --muted: #5c6a5f;
  --amber: #a1720a;
  --amber-bright: #f5c044;
  --amber-deep: #8a6207;
  --amber-dim: rgba(212, 160, 32, 0.14);
  --green: #2e7d4f;
  --green-dim: rgba(46, 125, 79, 0.1);
  --red: #bc5233;
  --red-dim: rgba(188, 82, 51, 0.1);
  --shadow: 0 10px 30px rgba(29, 39, 33, 0.08);
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
  --mono: "JetBrains Mono", "Cascadia Code", Consolas, Menlo,
    "Noto Sans Mono CJK SC", monospace;
  --wrap: 1120px;
  --radius: 10px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; }

::selection { background: rgba(245, 192, 68, 0.5); }

:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
  border-radius: 4px;
}

.wrap {
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 40px);
}

.wrap-wide { max-width: 1360px; }

/* ---------- 顶部导航 ---------- */

.site-head {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(243, 245, 240, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-soft);
}

.site-head .wrap {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-family: var(--mono);
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.brand img { width: 28px; height: 28px; border-radius: 7px; }

.brand b { color: var(--amber); font-weight: 600; }

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.main-nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.9375rem;
  padding: 6px 12px;
  border-radius: 7px;
  transition: color 0.15s, background 0.15s;
}

.main-nav a:hover { color: var(--text); background: var(--panel-2); }
.main-nav a[aria-current="page"] { color: var(--amber); }

.head-actions { display: flex; align-items: center; gap: 10px; margin-left: 8px; }

.nav-toggle {
  display: none;
  margin-left: auto;
  background: none;
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 8px;
  padding: 7px 12px;
  font-family: inherit;
  font-size: 0.875rem;
  cursor: pointer;
}

/* ---------- 按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 9px;
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s, border-color 0.15s, transform 0.15s;
}

.btn:active { transform: translateY(1px); }

.btn-solid {
  background: var(--amber-bright);
  color: #20180a;
  font-weight: 600;
}
.btn-solid:hover { background: #eeb32a; }

.btn-ghost {
  border-color: var(--line);
  color: var(--text);
  background: transparent;
}
.btn-ghost:hover { border-color: var(--amber); color: var(--amber); }

.btn-sm { padding: 6px 14px; font-size: 0.875rem; }

.btn .icon-gh { width: 17px; height: 17px; fill: currentColor; }

/* ---------- Hero ---------- */

.hero {
  padding-block: clamp(56px, 9vh, 96px) clamp(48px, 7vh, 80px);
}

.hero .wrap {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: clamp(36px, 5vw, 64px);
  align-items: center;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 0.875rem;
  margin: 0 0 18px;
}

.hero-kicker .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 3px var(--green-dim);
}

.hero h1 {
  margin: 0 0 20px;
  font-size: clamp(1.9rem, 4.2vw, 3rem);
  line-height: 1.28;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.hero .lede {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 1.0625rem;
  max-width: 34em;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 34px; }

.factbar {
  display: flex;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.factbar div {
  padding-right: 22px;
  margin-right: 22px;
  border-right: 1px solid var(--line);
}
.factbar div:last-child { border-right: 0; margin-right: 0; padding-right: 0; }

.factbar strong {
  display: block;
  font-family: var(--mono);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--amber);
  line-height: 1.3;
}

.factbar span { font-size: 0.8125rem; color: var(--muted); }

/* ---------- 会话窗口复刻 ---------- */

.term {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 24px 60px rgba(29, 39, 33, 0.22);
  overflow: hidden;
  font-size: 0.8438rem;
}

/* 深色岛：会话窗口与代码块保持深色，与亮色页面形成对比 */
.term,
.codeblock {
  --panel: #121a16;
  --panel-2: #18231c;
  --line: #26332c;
  --line-soft: #1e2a23;
  --text: #e9ece6;
  --muted: #97a49a;
  --amber: #f5c044;
  --amber-dim: rgba(245, 192, 68, 0.12);
  --green: #7bc49a;
  --red: #e07a5f;
  color: var(--text);
}

.term-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line-soft);
  background: var(--panel-2);
  color: var(--muted);
  font-size: 0.7813rem;
}

.term-bar .tstate {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.term-bar .tstate i {
  width: 7px; height: 7px; border-radius: 50%; background: var(--green);
}

.term-body { padding: 18px 18px 14px; display: grid; gap: 12px; }

.msg-user {
  background: var(--amber-dim);
  border-left: 2px solid var(--amber);
  border-radius: 6px;
  padding: 8px 12px;
  color: var(--text);
}

.msg-agent {
  color: var(--muted);
  padding-inline: 2px;
}
.msg-agent .who { color: var(--amber); font-family: var(--mono); font-size: 0.7813rem; margin-right: 6px; }

.tcard {
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--panel-2);
  padding: 9px 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.tcard .tico { color: var(--muted); flex-shrink: 0; width: 15px; height: 15px; }
.tcard .tname { font-family: var(--mono); font-size: 0.7813rem; }
.tcard .targ { color: var(--muted); font-family: var(--mono); font-size: 0.7813rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tcard .tstate-chip {
  margin-left: auto;
  flex-shrink: 0;
  font-size: 0.7188rem;

  padding: 1px 9px;
}
.tcard.done .tstate-chip { color: var(--green); border-color: rgba(123, 196, 154, 0.45); }
.tcard.done .tico { color: var(--green); }

/* hero 载入编排：卡片依次点亮、状态翻转 */
.term .fx { opacity: 0; transform: translateY(6px); animation: rise 0.5s ease forwards; }
.term .fx-1 { animation-delay: 0.15s; }
.term .fx-2 { animation-delay: 0.55s; }
.term .fx-3 { animation-delay: 0.85s; }
.term .fx-4 { animation-delay: 1.15s; }
.term .fx-5 { animation-delay: 1.55s; }

@keyframes rise { to { opacity: 1; transform: none; } }

.term .tcard .flip { position: relative; }
.term .tcard .flip .s2 { position: absolute; inset: 0; opacity: 0; display: inline-flex; align-items: center; justify-content: flex-end; }

.term .tcard.go-done .flip .s1 { animation: fadeout 0.4s ease forwards; animation-delay: var(--done, 2s); }
.term .tcard.go-done .flip .s2 { animation: fadein 0.4s ease forwards; animation-delay: var(--done, 2s); }
.term .tcard.go-done { animation: settle 0.4s ease forwards; animation-delay: var(--done, 2s); }

@keyframes fadeout { to { opacity: 0; } }
@keyframes fadein { to { opacity: 1; } }
@keyframes settle { to { border-color: rgba(123, 196, 154, 0.45); } }

.term .tcard.go-done .flip .s1, .term .tcard.go-done .flip .s2 { white-space: nowrap; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .term .fx, .term .tcard.go-done, .term .tcard.go-done .flip .s1, .term .tcard.go-done .flip .s2 {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ---------- 通用 section ---------- */

.section { padding-block: clamp(64px, 10vh, 104px); }
.section + .section { border-top: 1px solid var(--line-soft); }
.section-alt { background: var(--panel); }

.sec-head { max-width: 40em; margin-bottom: clamp(36px, 5vh, 52px); }
.sec-head h2 {
  margin: 0 0 12px;
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1.3;
  font-weight: 700;
}
.sec-head p { margin: 0; color: var(--muted); }

/* ---------- 能力条目（不对称大条目） ---------- */

.feat {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: center;
  padding-block: clamp(30px, 4.5vh, 46px);
}
.feat + .feat { border-top: 1px solid var(--line-soft); }
.feat:first-of-type { padding-top: 8px; }

.feat-flip .feat-text { order: 2; }
.feat-flip .feat-visual { order: 1; }

.feat-ico { color: var(--amber); width: 26px; height: 26px; margin-bottom: 14px; }
.feat-text h3 { margin: 0 0 4px; font-size: 1.25rem; font-weight: 650; }
.feat-text .feat-sub { margin: 0 0 12px; color: var(--muted); font-size: 0.9375rem; }
.feat-text ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 7px; }
.feat-text li {
  position: relative;
  padding-left: 18px;
  color: var(--muted);
  font-size: 0.9375rem;
}
.feat-text li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.72em;
  width: 7px; height: 7px;
  border: 1.5px solid var(--amber);
  border-radius: 2px;
  transform: rotate(45deg);
}
.feat-text li strong { color: var(--text); font-weight: 550; }

.feat-visual { min-width: 0; }

/* 权限卡复刻 */
.permcard {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  max-width: 400px;
  box-shadow: 0 18px 44px rgba(29, 39, 33, 0.12);
  overflow: hidden;
}
.permcard-head {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 0.8438rem;
  color: var(--amber);
  display: flex; align-items: center; gap: 8px;
}
.permcard-body { padding: 14px 16px; font-size: 0.8438rem; color: var(--muted); }
.permcard-body .mono-line {
  font-family: var(--mono);
  font-size: 0.7813rem;
  color: var(--text);
  background: var(--panel-2);
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  padding: 7px 10px;
  margin: 8px 0 14px;
  overflow-x: auto;
  white-space: nowrap;
}
.permcard-btns { display: flex; gap: 8px; padding: 0 16px 16px; flex-wrap: wrap; }
.pbtn {
  font-size: 0.7813rem;
  padding: 6px 12px;
  border-radius: 7px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  font-family: inherit;
}
.pbtn.ok { background: var(--green-dim); border-color: rgba(123, 196, 154, 0.45); color: var(--green); }
.pbtn.deny { background: var(--red-dim); border-color: rgba(224, 122, 95, 0.4); color: var(--red); }

/* 能力绑定小表 */
.bind-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8438rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}
.bind-table th, .bind-table td {
  text-align: left;
  padding: 9px 16px;
  border-bottom: 1px solid var(--line-soft);
}
.bind-table tr:last-child td { border-bottom: 0; }
.bind-table th { color: var(--muted); font-weight: 500; font-size: 0.7813rem; background: var(--panel-2); }
.bind-table td:first-child { color: var(--text); }
.bind-table td .mono { font-family: var(--mono); font-size: 0.7813rem; color: var(--amber); }

/* 多模态网格 */
.mm-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.mm-cell {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  padding: 14px 12px;
  text-align: center;
}
.mm-cell svg { width: 22px; height: 22px; margin: 0 auto 8px; color: var(--amber); }
.mm-cell b { display: block; font-size: 0.8438rem; font-weight: 550; }
.mm-cell span { font-size: 0.7188rem; color: var(--muted); font-family: var(--mono); }

/* ---------- 代码块 ---------- */

.codeblock {
  background: #0a100d;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  margin: 0;
}
.codeblock figcaption {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-bottom: 1px solid var(--line-soft);
  background: var(--panel);
  color: var(--muted);
  font-size: 0.7813rem;
  font-family: var(--mono);
}
.codeblock figcaption .fdot { width: 8px; height: 8px; border-radius: 50%; background: var(--amber); opacity: 0.75; }
.codeblock pre {
  margin: 0;
  padding: 16px 18px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: #cfd8d0;
}
.codeblock .cm { color: #6f7d74; }
.codeblock .kw { color: var(--amber); }
.codeblock .st { color: var(--green); }

/* ---------- 截图墙 ---------- */

.shots { display: grid; grid-template-columns: 1fr; gap: clamp(32px, 4.5vw, 52px); }

.shot { margin: 0; }

.shot-frame {
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.shot:hover .shot-frame {
  transform: translateY(-3px);
  box-shadow: 0 18px 48px rgba(29, 39, 33, 0.16);
}

/* mac 式窗口栏：三色圆点 + 居中标题 */
.shot-bar {
  position: relative;
  display: block;
  text-align: center;
  padding: 10px 16px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--line-soft);
  font-size: 0.8125rem;
  color: var(--muted);
  font-family: var(--mono);
}
.shot-bar i {
  position: absolute;
  left: 16px; top: 50%;
  width: 10px; height: 10px;
  margin-top: -5px;
  border-radius: 50%;
  background: #e0655a;
  box-shadow: 16px 0 0 #eec26a, 32px 0 0 #7fc08f;
}

/* 按图片原生比例完整显示，不裁切 */
.shot-frame img {
  display: block;
  width: 100%;
  height: auto;
  cursor: zoom-in;
}

.shot-ph {
  aspect-ratio: 16 / 10;
  display: grid;
  place-content: center;
  gap: 6px;
  text-align: center;
  border: 1.5px dashed var(--line);
  color: var(--muted);
  font-size: 0.8125rem;
  background:
    radial-gradient(rgba(161, 114, 10, 0.14) 1px, transparent 1.5px) 0 0 / 22px 22px;
}
.shot-ph b { color: var(--text); font-weight: 550; font-size: 0.9375rem; }
.shot-ph code { font-family: var(--mono); font-size: 0.75rem; color: var(--amber); }

.shot figcaption {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  padding: 12px 4px 0;
  font-size: 0.875rem;
  color: var(--muted);
}
.shot figcaption b { color: var(--text); font-weight: 600; }

/* ---------- 教程卡 ---------- */

.tuts { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(16px, 2.5vw, 24px); }

.tut-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 26px 24px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  text-decoration: none;
  transition: border-color 0.15s, transform 0.15s;
}
.tut-card:hover { border-color: var(--amber); transform: translateY(-2px); }
.tut-card .tstep {
  font-family: var(--mono);
  font-size: 0.7813rem;
  color: var(--amber);
}
.tut-card h3 { margin: 0; font-size: 1.125rem; font-weight: 650; }
.tut-card p { margin: 0; color: var(--muted); font-size: 0.9063rem; flex: 1; }
.tut-card .tgo { color: var(--amber); font-size: 0.875rem; }

/* ---------- 下载 ---------- */

.dl-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: clamp(28px, 4vw, 48px); align-items: start; }

.dl-table { width: 100%; border-collapse: collapse; font-size: 0.9063rem; }
.dl-table th {
  text-align: left;
  color: var(--muted);
  font-weight: 500;
  font-size: 0.8125rem;
  padding: 0 14px 10px;
  border-bottom: 1px solid var(--line);
}
.dl-table td { padding: 13px 14px; border-bottom: 1px solid var(--line-soft); vertical-align: top; }
.dl-table tr:last-child td { border-bottom: 0; }
.dl-table .os { font-weight: 600; white-space: nowrap; }
.dl-table .fmt { font-family: var(--mono); font-size: 0.8125rem; color: var(--muted); }
.dl-table .note { color: var(--muted); font-size: 0.8125rem; }

/* ---------- FAQ ---------- */

.faq { max-width: 46em; }
.faq details { border-bottom: 1px solid var(--line-soft); }
.faq summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 18px 4px;
  font-size: 1.0313rem;
  font-weight: 550;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before {
  content: "+";
  font-family: var(--mono);
  color: var(--amber);
  flex-shrink: 0;
  width: 1em;
}
.faq details[open] summary::before { content: "–"; }
.faq details p { margin: 0 0 18px; padding-left: calc(1em + 14px); color: var(--muted); font-size: 0.9375rem; }
.faq details p code, .faq details p a { color: var(--amber); }

/* ---------- 联系 ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}
.contact-grid h2 { margin: 0 0 12px; font-size: clamp(1.5rem, 3vw, 2rem); }
.contact-grid .c-lede { color: var(--muted); margin: 0 0 24px; max-width: 32em; }

.wx-row { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.wx-id {
  font-family: var(--mono);
  font-size: 1.25rem;
  letter-spacing: 0.04em;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 18px;
}
.wx-note { color: var(--muted); font-size: 0.8438rem; margin-top: 14px; }

.qr-box {
  background: #fff;
  padding: 12px;
  border-radius: 14px;
  width: 168px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.qr-box img { width: 100%; border-radius: 6px; }
.qr-box .qr-cap { color: #444; font-size: 0.75rem; text-align: center; margin-top: 8px; font-family: var(--sans); }

/* ---------- 页脚 ---------- */

.site-foot { border-top: 1px solid var(--line-soft); padding-block: 48px 40px; }
.foot-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 40px;
}
.foot-grid h4 { margin: 0 0 12px; font-size: 0.8438rem; color: var(--text); font-weight: 600; }
.foot-grid ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.foot-grid a { color: var(--muted); text-decoration: none; font-size: 0.875rem; }
.foot-grid a:hover { color: var(--amber); }
.foot-brand p { color: var(--muted); font-size: 0.875rem; margin: 10px 0 0; max-width: 26em; }
.foot-legal {
  border-top: 1px solid var(--line-soft);
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.8125rem;
}

/* ---------- 教程页 ---------- */

.crumbs {
  padding-top: 28px;
  font-size: 0.8438rem;
  color: var(--muted);
}
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--amber); }
.crumbs span[aria-hidden] { margin-inline: 8px; color: var(--muted); }

.doc { display: grid; grid-template-columns: minmax(0, 1fr) 216px; gap: clamp(36px, 5vw, 72px); padding-block: 40px clamp(64px, 10vh, 96px); }

.doc-main { max-width: 46em; }
.doc-main > header { margin-bottom: 36px; }
.doc-main h1 { margin: 0 0 12px; font-size: clamp(1.7rem, 3.4vw, 2.3rem); line-height: 1.3; }
.doc-main > header p { margin: 0; color: var(--muted); }

.doc h2 {
  font-size: 1.375rem;
  margin: 0 0 18px;
  padding-top: 44px;
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: 96px;
}
.doc h2:first-of-type { border-top: 0; padding-top: 8px; }
.doc h3 { font-size: 1.0625rem; margin: 28px 0 12px; }
.doc p { color: var(--muted); margin: 0 0 16px; }
.doc p strong, .doc li strong { color: var(--text); font-weight: 550; }
.doc ul, .doc ol { color: var(--muted); padding-left: 1.4em; margin: 0 0 16px; display: grid; gap: 6px; }
.doc a { color: var(--amber); }
.doc code {
  font-family: var(--mono);
  font-size: 0.8625em;
  background: var(--panel-2);
  border: 1px solid var(--line-soft);
  border-radius: 5px;
  padding: 1px 6px;
  color: var(--text);
  white-space: nowrap;
}
.doc pre code { background: none; border: 0; padding: 0; white-space: pre; }
.doc .codeblock { margin: 0 0 20px; }

/* 步骤（真序列，允许编号） */
.steps { display: grid; gap: 0; margin: 0 0 20px; padding: 0; list-style: none; }
.steps li {
  position: relative;
  padding: 0 0 26px 44px;
  color: var(--muted);
}
.steps li::before {
  content: attr(data-n);
  position: absolute;
  left: 0; top: 0;
  width: 28px; height: 28px;
  display: grid;
  place-content: center;
  border: 1.5px solid var(--amber);
  color: var(--amber);
  border-radius: 50%;
  font-family: var(--mono);
  font-size: 0.8125rem;
}
.steps li::after {
  content: "";
  position: absolute;
  left: 13.5px; top: 32px; bottom: 4px;
  width: 1px;
  background: var(--line);
}
.steps li:last-child { padding-bottom: 4px; }
.steps li:last-child::after { display: none; }
.steps li b { color: var(--text); display: block; margin-bottom: 2px; font-weight: 600; }

/* 提示框 */
.callout {
  display: flex;
  gap: 12px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--amber);
  background: var(--panel);
  border-radius: 8px;
  padding: 14px 16px;
  margin: 0 0 20px;
  font-size: 0.9063rem;
  color: var(--muted);
}
.callout .c-ico { color: var(--amber); flex-shrink: 0; margin-top: 3px; }
.callout.warn { border-left-color: var(--red); }
.callout.warn .c-ico { color: var(--red); }
.callout p { margin: 0; }
.callout code { white-space: nowrap; }

/* 目录 */
.doc-toc { position: sticky; top: 92px; align-self: start; font-size: 0.875rem; }
.doc-toc .toc-t { color: var(--muted); margin: 0 0 10px; font-size: 0.7813rem; }
.doc-toc ol { list-style: none; padding: 0; margin: 0; display: grid; gap: 2px; border-left: 1px solid var(--line); }
.doc-toc a {
  display: block;
  padding: 5px 14px;
  color: var(--muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  margin-left: -1.5px;
}
.doc-toc a:hover, .doc-toc a.active { color: var(--amber); border-left-color: var(--amber); }

/* 上/下篇翻页 */
.doc-pager { display: flex; justify-content: space-between; gap: 16px; margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--line-soft); }
.doc-pager a {
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 18px;
  max-width: 46%;
  transition: border-color 0.15s;
}
.doc-pager a:hover { border-color: var(--amber); }
.doc-pager .dir { display: block; font-size: 0.7813rem; color: var(--muted); }
.doc-pager .tt { color: var(--text); font-size: 0.9375rem; font-weight: 550; }
.doc-pager .next { margin-left: auto; text-align: right; }

/* ---------- 响应式 ---------- */

@media (max-width: 1020px) {
  .doc { grid-template-columns: minmax(0, 1fr); }
  .doc-toc { display: none; }
}

@media (max-width: 900px) {
  .hero .wrap { grid-template-columns: 1fr; }
  .feat, .feat-flip .feat-text, .feat-flip .feat-visual { grid-template-columns: 1fr; }
  .feat-flip .feat-text { order: 1; }
  .feat-flip .feat-visual { order: 2; }
  .dl-grid { grid-template-columns: 1fr; }
  .tuts { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .mm-grid { grid-template-columns: repeat(2, 1fr); }

  .nav-toggle { display: block; }
  .main-nav {
    display: none;
    position: absolute;
    top: 64px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    padding: 12px 20px 18px;
    gap: 2px;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 11px 10px; font-size: 1rem; }
  .head-actions { margin-left: 0; }
  .head-actions .btn-gh-text { display: none; }
}

@media (max-width: 560px) {
  .factbar { flex-wrap: wrap; gap: 14px 0; }
  .factbar div { width: 50%; border-right: 0; margin: 0; padding: 0; }
  .foot-grid { grid-template-columns: 1fr; }
  .permcard { max-width: 100%; }
  .wx-id { font-size: 1.0625rem; }
}

/* ---------- 灯箱：点击截图查看大图 ---------- */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(10, 14, 12, 0.82);
  backdrop-filter: blur(4px);
}
.lightbox.open { display: flex; }
.lightbox img {
  max-width: 94vw;
  max-height: 88vh;
  border-radius: 10px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5);
}
.lightbox-close {
  position: absolute;
  top: 14px; right: 20px;
  background: none;
  border: 0;
  color: #fff;
  font-size: 2.2rem;
  line-height: 1;
  padding: 8px;
  cursor: pointer;
  font-family: inherit;
}
.lightbox-cap {
  position: absolute;
  bottom: 18px; left: 0; right: 0;
  text-align: center;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.8438rem;
}
body.lb-lock { overflow: hidden; }