/* ===== FPV 调参台 主题变量 =====
   视觉规范沿用主站：html.dark 切换明暗、CSS 变量驱动、侧栏用 SVG 图标（不用 emoji）。
   配色换成果断的 FPV 竞速风：橙(推进) + 青(陀螺仪/滤波)。 */

:root {
  --accent: #ff7a18;
  --accent-2: #18c8d8;
  --radius: 14px;
  --shadow: 0 6px 22px rgba(0,0,0,.16);
  --maxw: 1080px;
}

html {
  --bg: #f4f6f8;
  --bg-elev: #ffffff;
  --bg-soft: #eef1f4;
  --text: #1b1f26;
  --muted: #66707d;
  --border: #e2e6ea;
  --topbar: #ffffff;
  --sidebar: #fbfcfd;
  --code-bg: #f0f2f5;
}

html.dark {
  --bg: #0e1014;
  --bg-elev: #171b22;
  --bg-soft: #1e232c;
  --text: #e8ebf0;
  --muted: #8b93a1;
  --border: #282e38;
  --topbar: #13161c;
  --sidebar: #11141a;
  --code-bg: #0c0e12;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }

/* 与主站一致：禁止页面级横向溢出 */
body { overflow-x: clip; }

body {
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.65;
  transition: background .25s, color .25s;
}

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

/* ===== 布局 ===== */
.layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  grid-template-rows: 56px 1fr auto;
  grid-template-areas: "top top" "side main" "side foot";
  min-height: 100vh;
  transition: grid-template-columns .28s ease;
}

.topbar {
  grid-area: top;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 16px;
  background: var(--topbar);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 30;
}
.topbar-left, .topbar-right { display: flex; align-items: center; gap: 8px; }
.logo { font-size: 18px; font-weight: 800; letter-spacing: .5px; }
.logo-accent { color: var(--accent); margin-left: 2px; }
.brand-en { font-size: 12px; color: var(--muted); margin-left: 8px; letter-spacing: 1px; }

.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 10px;
  border: 1px solid transparent; background: transparent; color: var(--text);
  cursor: pointer; transition: background .15s, border-color .15s;
}
.icon-btn:hover { background: var(--bg-soft); border-color: var(--border); }
.icon-btn svg { width: 20px; height: 20px; }

.theme-toggle text { font-size: 0; }

/* ===== 侧栏 ===== */
.sidebar {
  grid-area: side;
  background: var(--sidebar);
  border-right: 1px solid var(--border);
  padding: 14px 10px;
  position: sticky; top: 56px; align-self: start;
  height: calc(100vh - 56px);
  overflow-y: auto;
}
.sidebar-header { display: flex; align-items: center; gap: 10px; padding: 4px 8px 14px; }
.sb-logo { width: 34px; height: 34px; border-radius: 9px; }
.sb-name { display: block; font-weight: 700; font-size: 15px; }
.sb-domain { display: block; font-size: 11px; color: var(--muted); }

.menu { display: flex; flex-direction: column; gap: 2px; }
.menu a {
  display: flex; align-items: center; gap: 11px;
  padding: 10px 12px; border-radius: 10px;
  color: var(--text); font-size: 14px; font-weight: 500;
}
.menu a svg { width: 19px; height: 19px; flex: none; color: var(--muted); }
.menu a:hover { background: var(--bg-soft); text-decoration: none; }
.menu a.active { background: color-mix(in srgb, var(--accent) 16%, transparent); color: var(--accent); }
.menu a.active svg { color: var(--accent); }

.backdrop { display: none; }

/* ===== 内容 ===== */
.content { grid-area: main; padding: 26px 26px 60px; }
.wrap { max-width: var(--maxw); margin: 0 auto; }

.footer {
  grid-area: foot;
  border-top: 1px solid var(--border);
  background: var(--topbar);
  padding: 16px 26px;
  color: var(--muted); font-size: 12.5px; text-align: center;
}

/* ===== Hero ===== */
.hero {
  border-radius: 20px; padding: 40px 34px;
  background:
    radial-gradient(900px 300px at 12% -10%, color-mix(in srgb, var(--accent) 30%, transparent), transparent 60%),
    radial-gradient(700px 280px at 92% 0%, color-mix(in srgb, var(--accent-2) 26%, transparent), transparent 60%),
    var(--bg-elev);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.hero h1 { margin: 0 0 8px; font-size: 30px; letter-spacing: .5px; }
.hero .sub { color: var(--muted); font-size: 15px; margin: 0 0 18px; max-width: 640px; }
.hero .tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  font-size: 12.5px; padding: 5px 11px; border-radius: 999px;
  background: var(--bg-soft); border: 1px solid var(--border); color: var(--muted);
}

/* ===== 卡片 ===== */
.section-title { font-size: 20px; margin: 34px 0 14px; display: flex; align-items: center; gap: 10px; }
.section-title svg { width: 22px; height: 22px; color: var(--accent); }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(248px, 1fr)); gap: 16px; }
.card {
  display: block; color: var(--text);
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
  box-shadow: var(--shadow); transition: transform .18s, border-color .18s;
}
.card:hover { transform: translateY(-3px); border-color: var(--accent); text-decoration: none; }
.card .ico {
  width: 42px; height: 42px; border-radius: 11px; display: grid; place-items: center;
  background: color-mix(in srgb, var(--accent) 14%, transparent); color: var(--accent); margin-bottom: 12px;
}
.card .ico svg { width: 22px; height: 22px; }
.card h3 { margin: 0 0 6px; font-size: 16px; }
.card p { margin: 0; color: var(--muted); font-size: 13px; }

/* ===== 通用组件 ===== */
.panel {
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow);
  margin: 18px 0;
}
h2 { font-size: 22px; margin: 6px 0 14px; }
h3 { font-size: 17px; margin: 22px 0 8px; }
p { margin: 10px 0; }
.muted { color: var(--muted); }
.note {
  border-left: 3px solid var(--accent-2); background: var(--bg-soft);
  padding: 10px 14px; border-radius: 8px; color: var(--muted); font-size: 13px; margin: 14px 0;
}
.warn {
  border-left: 3px solid var(--accent); background: var(--bg-soft);
  padding: 10px 14px; border-radius: 8px; margin: 14px 0;
}

code, .code {
  font-family: "JetBrains Mono", "Consolas", ui-monospace, monospace;
  background: var(--code-bg); padding: 1px 6px; border-radius: 6px; font-size: 12.5px;
}
pre {
  background: var(--code-bg); border: 1px solid var(--border);
  border-radius: 10px; padding: 14px 16px; overflow-x: auto;
  font-family: "JetBrains Mono", "Consolas", ui-monospace, monospace;
  font-size: 12.5px; line-height: 1.55; position: relative;
}
pre .copy {
  position: absolute; top: 8px; right: 8px;
  font-size: 12px; padding: 4px 10px; border-radius: 7px;
  border: 1px solid var(--border); background: var(--bg-elev); color: var(--text);
  cursor: pointer;
}
pre .copy:hover { border-color: var(--accent); color: var(--accent); }

table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: 13px; overflow-x: auto; display: block; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; background: var(--bg-soft); }

/* ===== 表单 / 计算器 ===== */
.field { display: grid; gap: 6px; margin: 14px 0; }
.field label { font-size: 13px; color: var(--muted); }
.field .row { display: flex; align-items: center; gap: 12px; }
input[type=range] { flex: 1; accent-color: var(--accent); }
input[type=number] {
  width: 92px; padding: 7px 9px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg); color: var(--text);
}
.val { font-variant-numeric: tabular-nums; min-width: 64px; text-align: right; font-weight: 700; color: var(--accent); }

.chart-wrap { background: var(--bg-soft); border: 1px solid var(--border); border-radius: 12px; padding: 14px; }
canvas { width: 100%; height: 320px; display: block; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px; border-radius: 10px; cursor: pointer;
  background: var(--accent); color: #fff; border: 0; font-weight: 700; font-size: 14px;
}
.btn:hover { filter: brightness(1.06); }
.btn.ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }

.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 820px) { .grid2 { grid-template-columns: 1fr; } }

/* ===== 鸣谢墙 ===== */
.roster-top { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; margin: 10px 0 6px; }
.roster-top .rc {
  display: flex; flex-direction: column; align-items: center; text-align: center;
  padding: 16px 12px; border-radius: var(--radius);
  background: var(--bg-elev); border: 1px solid var(--border);
}
.roster-top .rc.gold { border-color: var(--accent); }
.roster-top .rc img { width: 56px; height: 56px; border-radius: 50%; object-fit: cover; background: var(--bg-soft); margin-bottom: 10px; }
.roster-top .rc .nm { font-weight: 700; max-width: 100%; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.roster-top .rc .rk { color: var(--muted); font-size: 12px; margin-top: 2px; }

.roster-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0 6px; }
.roster-chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 5px 12px 5px 5px; border-radius: 999px;
  background: var(--bg-soft); border: 1px solid var(--border);
  font-size: 13px; max-width: 100%;
}
.roster-chip img { width: 26px; height: 26px; border-radius: 50%; object-fit: cover; background: var(--bg); flex: none; }
.roster-chip .nm { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 170px; }

.roster-meta { color: var(--muted); font-size: 12.5px; margin-top: 14px; }

/* ===== 遥控试参 ===== */
.ratebar {
  height: 12px; border-radius: 999px; overflow: hidden;
  background: var(--bg-soft); border: 1px solid var(--border); margin-top: 6px;
}
.ratebar i { display: block; height: 100%; width: 0%; background: var(--accent); transition: width .06s linear; }
.ratebar.teal i { background: var(--accent-2); }
.sel {
  width: 100%; padding: 8px 10px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg); color: var(--text);
  font-size: 13px;
}

/* ===== 移动端 ===== */
@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; grid-template-areas: "top" "main" "foot"; }
  .sidebar {
    position: fixed; left: 0; top: 56px; bottom: 0; width: 250px; z-index: 40;
    transform: translateX(-100%); transition: transform .26s ease;
    box-shadow: var(--shadow);
  }
  .layout.nav-open .sidebar { transform: translateX(0); }
  .layout.nav-open .backdrop {
    display: block; position: fixed; inset: 56px 0 0 0; background: rgba(0,0,0,.45); z-index: 35;
  }
  .menu-toggle { display: inline-flex; }
  .content { padding: 18px 14px 48px; }
}
.menu-toggle { display: none; }