/* ============================================================
   FF SDK Developer Documentation — shared stylesheet
   工业精密风格：深色侧边栏 + 暖纸色正文 + 平台专属强调色
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Albert+Sans:ital,wght@0,400;0,500;0,600;0,700;0,800;1,400&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root {
  --ink: #1a1d21;
  --ink-soft: #4a5058;
  --ink-faint: #8a9099;
  --paper: #faf9f6;
  --paper-raise: #ffffff;
  --hairline: #e4e1da;
  --sidebar-bg: #15181c;
  --sidebar-ink: #b9bec6;
  --sidebar-dim: #6b7178;
  --code-bg: #1e2228;
  --code-ink: #d8dde4;
  --accent: #e8930c;          /* default: aegis amber */
  --accent-soft: #e8930c1a;
  --ok: #1fa15f;
  --warn: #d98a00;
  --plan: #8a9099;
  --bad: #c4453a;
  --radius: 10px;
  --sidebar-w: 264px;
  --topbar-h: 56px;
  --font-ui: 'Albert Sans', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;
}

body.platform-aegis    { --accent: #e8930c; --accent-soft: #e8930c14; }
body.platform-futurist { --accent: #0e7ad3; --accent-soft: #0e7ad312; }
body.platform-master   { --accent: #7c4dd8; --accent-soft: #7c4dd812; }
body.platform-navi     { --accent: #1fa15f; --accent-soft: #1fa15f12; }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--topbar-h) + 16px); }
body {
  margin: 0;
  font-family: var(--font-ui);
  color: var(--ink);
  background: var(--paper);
  font-size: 15.5px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

/* ---------- topbar ---------- */
.topbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  height: var(--topbar-h);
  display: flex; align-items: center; gap: 20px;
  padding: 0 24px;
  background: rgba(21,24,28,.97);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #ffffff14;
}
.topbar .brand {
  display: flex; align-items: baseline; gap: 10px;
  color: #fff; text-decoration: none; font-weight: 800; font-size: 16px;
  letter-spacing: .02em;
}
.topbar .brand .mark { color: var(--accent); }
.topbar .brand .sub  { font-family: var(--font-mono); font-size: 11px; font-weight: 500; color: var(--sidebar-dim); letter-spacing: .12em; text-transform: uppercase; }
.topbar nav { margin-left: auto; display: flex; gap: 4px; }
.topbar nav a {
  color: var(--sidebar-ink); text-decoration: none; font-size: 13.5px; font-weight: 600;
  padding: 6px 12px; border-radius: 6px;
}
.topbar nav a:hover { color: #fff; background: #ffffff10; }
.topbar nav a.active { color: #fff; background: var(--accent); }
.version-chip {
  font-family: var(--font-mono); font-size: 11px; color: var(--sidebar-dim);
  border: 1px solid #ffffff22; border-radius: 999px; padding: 2px 10px;
}

/* ---------- layout ---------- */
.layout { display: flex; min-height: 100vh; padding-top: var(--topbar-h); }

.sidebar {
  position: fixed; top: var(--topbar-h); bottom: 0; left: 0;
  width: var(--sidebar-w);
  background: var(--sidebar-bg);
  overflow-y: auto;
  padding: 24px 0 48px;
  scrollbar-width: thin;
}
.sidebar .group-label {
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--sidebar-dim);
  padding: 18px 24px 6px;
}
.sidebar a {
  display: block; color: var(--sidebar-ink); text-decoration: none;
  font-size: 13.5px; padding: 6px 24px 6px 23px;
  border-left: 2px solid transparent;
}
.sidebar a:hover { color: #fff; }
.sidebar a.active {
  color: #fff; border-left-color: var(--accent);
  background: linear-gradient(90deg, #ffffff0d, transparent);
}
.sidebar a .mono { font-family: var(--font-mono); font-size: 12px; }

.content {
  margin-left: var(--sidebar-w);
  flex: 1; min-width: 0;
  padding: 40px 56px 120px;
  max-width: 980px;
}

/* ---------- hero ---------- */
.doc-hero {
  position: relative;
  border: 1px solid var(--hairline);
  border-radius: 14px;
  padding: 36px 40px 32px;
  margin-bottom: 40px;
  background:
    linear-gradient(135deg, var(--accent-soft), transparent 55%),
    repeating-linear-gradient(0deg, transparent, transparent 23px, #00000006 23px, #00000006 24px),
    repeating-linear-gradient(90deg, transparent, transparent 23px, #00000006 23px, #00000006 24px),
    var(--paper-raise);
  overflow: hidden;
}
.doc-hero .kicker {
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .18em;
  text-transform: uppercase; color: var(--accent); font-weight: 700;
}
.doc-hero h1 { font-size: 34px; font-weight: 800; margin: 8px 0 10px; letter-spacing: -.01em; }
.doc-hero p.lede { font-size: 16.5px; color: var(--ink-soft); margin: 0; max-width: 640px; }
.doc-hero .meta {
  display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px;
}
.doc-hero .meta span {
  font-family: var(--font-mono); font-size: 11.5px;
  background: var(--paper); border: 1px solid var(--hairline);
  border-radius: 999px; padding: 3px 12px; color: var(--ink-soft);
}

/* ---------- typographic content ---------- */
section { margin-bottom: 56px; }
h2 {
  font-size: 24px; font-weight: 800; letter-spacing: -.01em;
  margin: 0 0 6px; padding-top: 12px;
  display: flex; align-items: center; gap: 12px;
}
h2 .h-num {
  font-family: var(--font-mono); font-size: 13px; font-weight: 700;
  color: var(--accent);
}
h2::after { content: ""; flex: 1; height: 1px; background: var(--hairline); }
h3 { font-size: 17.5px; font-weight: 700; margin: 28px 0 8px; }
h4 { font-size: 15px; font-weight: 700; margin: 20px 0 6px; }
p  { margin: 10px 0; }
a  { color: var(--accent); }
strong { font-weight: 700; }
ul, ol { padding-left: 22px; margin: 10px 0; }
li { margin: 4px 0; }

code {
  font-family: var(--font-mono); font-size: .86em;
  background: #00000009; border: 1px solid #00000010;
  border-radius: 5px; padding: .1em .4em;
}

/* ---------- code blocks ---------- */
.codeblock {
  position: relative; margin: 16px 0;
  border-radius: var(--radius); overflow: hidden;
  border: 1px solid #00000022;
  box-shadow: 0 2px 10px #0000000a;
}
.codeblock .cb-head {
  display: flex; align-items: center; justify-content: space-between;
  background: #14171b; color: #7d848d;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em;
  padding: 7px 14px; text-transform: uppercase;
  border-bottom: 1px solid #ffffff0e;
}
.codeblock button.copy {
  font-family: var(--font-mono); font-size: 11px; cursor: pointer;
  color: #9aa1aa; background: transparent; border: 1px solid #ffffff22;
  border-radius: 5px; padding: 2px 10px;
}
.codeblock button.copy:hover { color: #fff; border-color: #ffffff55; }
.codeblock pre {
  margin: 0; padding: 16px 18px; overflow-x: auto;
  background: var(--code-bg); color: var(--code-ink);
  font-family: var(--font-mono); font-size: 13px; line-height: 1.7;
}
.codeblock pre code { background: none; border: none; padding: 0; font-size: inherit; }
/* highlighter tokens */
.tok-kw  { color: #c792ea; }
.tok-str { color: #a3d39b; }
.tok-com { color: #5d666f; font-style: italic; }
.tok-num { color: #f0a35e; }
.tok-fn  { color: #7cb6f5; }
.tok-self{ color: #e8907a; }

/* ---------- tables ---------- */
table {
  width: 100%; border-collapse: collapse; margin: 16px 0;
  font-size: 14px; background: var(--paper-raise);
  border: 1px solid var(--hairline); border-radius: var(--radius);
  overflow: hidden;
}
table { display: block; overflow-x: auto; }
thead th {
  text-align: left; font-weight: 700; font-size: 12.5px;
  letter-spacing: .04em;
  background: #f1efe9;
  padding: 10px 14px; border-bottom: 1px solid var(--hairline);
  white-space: nowrap;
}
tbody td { padding: 9px 14px; border-bottom: 1px solid #efede7; vertical-align: top; }
tbody tr:last-child td { border-bottom: none; }
td code, th code { white-space: nowrap; }

/* status badges */
.b { font-family: var(--font-mono); font-size: 11px; font-weight: 700;
     border-radius: 4px; padding: 1px 7px; white-space: nowrap; }
.b-ok   { color: var(--ok);   background: #1fa15f14; }
.b-part { color: var(--warn); background: #d98a0016; }
.b-plan { color: var(--plan); background: #8a909916; }
.b-no   { color: var(--bad);  background: #c4453a12; }

/* ---------- callouts ---------- */
.callout {
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 12px 18px; margin: 16px 0; font-size: 14.5px;
}
.callout.danger { border-left-color: var(--bad); background: #c4453a0d; }
.callout.note   { border-left-color: var(--ink-faint); background: #8a909910; }
.callout .c-title {
  font-family: var(--font-mono); font-size: 11px; font-weight: 700;
  letter-spacing: .14em; text-transform: uppercase; display: block; margin-bottom: 4px;
}
.callout.danger .c-title { color: var(--bad); }
.callout:not(.danger):not(.note) .c-title { color: var(--accent); }
.callout.note .c-title { color: var(--ink-faint); }

/* API signature card */
.sig {
  font-family: var(--font-mono); font-size: 13px;
  background: var(--paper-raise); border: 1px solid var(--hairline);
  border-left: 3px solid var(--accent);
  border-radius: 6px; padding: 10px 16px; margin: 14px 0 6px;
  overflow-x: auto; white-space: pre;
}

/* footer */
.doc-footer {
  margin-top: 64px; padding-top: 24px; border-top: 1px solid var(--hairline);
  color: var(--ink-faint); font-size: 13px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
}
.doc-footer a { color: var(--ink-soft); }

/* prev/next pager */
.pager { display: flex; gap: 16px; margin-top: 48px; }
.pager a {
  flex: 1; text-decoration: none; border: 1px solid var(--hairline);
  border-radius: var(--radius); padding: 14px 18px; background: var(--paper-raise);
  color: var(--ink); transition: border-color .15s;
}
.pager a:hover { border-color: var(--accent); }
.pager .dir { font-family: var(--font-mono); font-size: 11px; color: var(--ink-faint); letter-spacing: .12em; text-transform: uppercase; }
.pager .title { font-weight: 700; margin-top: 2px; }
.pager a.next { text-align: right; }

/* mobile */
.menu-btn { display: none; }
@media (max-width: 920px) {
  .sidebar { transform: translateX(-100%); transition: transform .2s; z-index: 60; }
  body.nav-open .sidebar { transform: none; }
  .content { margin-left: 0; padding: 28px 20px 100px; }
  .menu-btn {
    display: inline-flex; align-items: center; gap: 6px;
    font-family: var(--font-mono); font-size: 12px;
    color: var(--sidebar-ink); background: none; border: 1px solid #ffffff2a;
    border-radius: 6px; padding: 4px 10px; cursor: pointer;
  }
  .topbar nav { display: none; }
}

/* ============================================================
   landing page (index.html)
   ============================================================ */
body.landing {
  background: #101317;
  color: #e7eaee;
  min-height: 100vh;
}
body.landing .land-wrap { max-width: 1080px; margin: 0 auto; padding: 0 28px 96px; }
.land-hero { padding: 96px 0 64px; position: relative; }
.land-hero .kicker {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .22em;
  text-transform: uppercase; color: #e8930c;
}
.land-hero h1 {
  font-size: clamp(40px, 6vw, 64px); font-weight: 800; letter-spacing: -.02em;
  margin: 14px 0 18px; line-height: 1.1;
}
.land-hero h1 .thin { color: #6b7178; font-weight: 500; }
.land-hero p { font-size: 18px; color: #aab1b9; max-width: 620px; margin: 0; }
.land-hero .grid-bg {
  position: absolute; inset: 0; pointer-events: none; z-index: -1;
  background:
    repeating-linear-gradient(0deg, transparent, transparent 39px, #ffffff07 39px, #ffffff07 40px),
    repeating-linear-gradient(90deg, transparent, transparent 39px, #ffffff07 39px, #ffffff07 40px);
  mask-image: radial-gradient(ellipse 80% 90% at 30% 20%, #000, transparent 75%);
}
.land-cards {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 18px; margin-top: 24px;
}
.land-card {
  --c: #e8930c;
  display: block; text-decoration: none; color: inherit;
  border: 1px solid #ffffff16; border-radius: 16px;
  background: linear-gradient(160deg, #1a1e24, #14171c);
  padding: 26px 24px 22px;
  position: relative; overflow: hidden;
  transition: transform .18s ease, border-color .18s ease;
}
.land-card:hover { transform: translateY(-4px); border-color: var(--c); }
.land-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--c);
}
.land-card .form-tag {
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--c);
}
.land-card h2 { font-size: 24px; margin: 8px 0 4px; font-weight: 800; display: block; }
.land-card h2::after { display: none; }
.land-card .code-name { font-family: var(--font-mono); font-size: 12px; color: #6b7178; }
.land-card p { font-size: 13.5px; color: #9aa1aa; margin: 12px 0 16px; line-height: 1.6; }
.land-card .caps { display: flex; flex-wrap: wrap; gap: 6px; }
.land-card .caps span {
  font-family: var(--font-mono); font-size: 10.5px; color: #aab1b9;
  border: 1px solid #ffffff1c; border-radius: 999px; padding: 2px 9px;
}
.land-card .go {
  margin-top: 18px; font-weight: 700; font-size: 13.5px; color: var(--c);
  display: inline-flex; align-items: center; gap: 6px;
}
.land-section-label {
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .2em;
  text-transform: uppercase; color: #6b7178; margin: 56px 0 16px;
  display: flex; align-items: center; gap: 14px;
}
.land-section-label::after { content: ""; flex: 1; height: 1px; background: #ffffff14; }
body.landing .codeblock { box-shadow: 0 8px 40px #00000066; border-color: #ffffff1a; }
.land-foot { margin-top: 72px; color: #6b7178; font-size: 13px; border-top: 1px solid #ffffff12; padding-top: 24px; }
.land-pillars { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.pillar { border: 1px solid #ffffff14; border-radius: 14px; padding: 20px 22px; background: #161a1f; }
.pillar .p-icon { font-family: var(--font-mono); color: #e8930c; font-size: 12px; letter-spacing: .14em; }
.pillar h3 { margin: 8px 0 6px; font-size: 16px; }
.pillar p { color: #9aa1aa; font-size: 13.5px; margin: 0; }