:root {
  --bg: #0f1216;
  --panel: #1a1f27;
  --panel2: #20262f;
  --border: #2b333f;
  --text: #e6ebf2;
  --muted: #8b95a5;
  --accent: #3f8cff;
  --accent2: #22c3a6;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
}

#app { display: flex; height: 100vh; }

/* ---------- 侧栏 ---------- */
#sidebar {
  width: 340px;
  min-width: 300px;
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.brand {
  padding: 18px 18px 14px;
  border-bottom: 1px solid var(--border);
}
.brand h1 {
  margin: 0;
  font-size: 20px;
  line-height: 1.3;
  letter-spacing: .5px;
}
.brand .sub {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 12px;
}

/* ---------- 语言切换 ---------- */
.brand-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}
.lang-switch {
  display: flex;
  align-items: center;
  gap: 5px;
  flex-shrink: 0;
  padding-top: 2px;
}
.lang-globe { font-size: 13px; opacity: .8; }
.lang-switch select {
  max-width: 104px;
  padding: 4px 6px;
  background: #12161c;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 12px;
  cursor: pointer;
}
.lang-switch select:hover { border-color: var(--accent); }

.panel { padding: 12px 16px; border-bottom: 1px solid var(--border); }
.panel.grow { flex: 1; min-height: 90px; overflow-y: auto; }
.panel h2 {
  margin: 0 0 10px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--muted);
}

/* ---------- 生成器按钮 ---------- */
#generator-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.gen-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 6px;
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  cursor: pointer;
  font-size: 12px;
  transition: border-color .15s, background .15s;
}
.gen-btn:hover { border-color: var(--accent); }
.gen-btn.active {
  border-color: var(--accent);
  background: rgba(63, 140, 255, .12);
}
.gen-icon { font-size: 18px; }

/* ---------- 参数表单 ---------- */
.gen-desc {
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 10px;
  line-height: 1.5;
}
.param {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: 7px 0;
  border-bottom: 1px dashed rgba(255,255,255,.05);
  cursor: default;
}
.param .p-label {
  flex: 0 0 40%;
  color: var(--text);
  font-size: 13px;
}
.param input[type="number"], .param select {
  flex: 1;
  min-width: 0;
  padding: 6px 8px;
  background: #12161c;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 13px;
}
.param input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}
.p-hint {
  flex-basis: 100%;
  color: var(--muted);
  font-size: 11px;
  padding-left: 40%;
}

/* ---------- 操作区 ---------- */
.actions {
  padding: 14px 16px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
  max-height: 64vh;
  overflow-y: auto;
}
.btn {
  display: block;
  width: 100%;
  padding: 11px;
  margin-bottom: 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel2);
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  transition: background .15s, border-color .15s;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.08); }
.btn.accent { background: var(--accent2); border-color: var(--accent2); color: #06251f; }
.btn.accent:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; color: var(--muted); }

#info { margin-top: 4px; font-size: 12px; color: var(--muted); line-height: 1.6; }
#info b { color: var(--text); font-weight: 600; }
#info .dim { color: #6b7686; }
.warn { color: #ff7b72; }

/* ---------- 视口 ---------- */
#viewport {
  position: relative;
  flex: 1;
  overflow: hidden;
}
#c { display: block; width: 100%; height: 100%; }
.hud {
  position: absolute;
  left: 14px;
  bottom: 12px;
  padding: 6px 10px;
  background: rgba(20, 24, 30, .75);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--muted);
  font-size: 12px;
  pointer-events: none;
}
.err {
  padding: 40px;
  text-align: center;
  color: #ff7b72;
}

/* ---------- 按钮行 / 说明链接 ---------- */
.btn-row { display: flex; gap: 8px; }
.btn-row .btn { width: auto; flex: 1; min-width: 0; font-size: 13px; padding: 9px 6px; }
.guide-link {
  display: block;
  margin-top: 10px;
  text-align: center;
  font-size: 12px;
  color: var(--muted);
  text-decoration: none;
}
.guide-link:hover { color: var(--accent); }

/* ---------- 正文内容（规格表 / 连接方式 / FAQ） ---------- */
#guide {
  background: #12161c;
  border-top: 1px solid var(--border);
  padding: 40px 0 8px;
  color: #cfd7e3;
  line-height: 1.75;
}
#guide .wrap { max-width: 900px; margin: 0 auto; padding: 0 22px; }
#guide .card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px 24px;
  margin-bottom: 20px;
}
#guide h2 {
  margin: 0 0 12px;
  font-size: 19px;
  color: var(--text);
  letter-spacing: .3px;
}
#guide h2::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 16px;
  margin-right: 9px;
  vertical-align: -2px;
  border-radius: 2px;
  background: var(--accent);
}
#guide p { margin: 0 0 12px; font-size: 14px; }
#guide p:last-child { margin-bottom: 0; }
#guide strong { color: #fff; }
#guide .muted, .muted { color: var(--muted); font-size: 12.5px; }
.table-wrap { overflow-x: auto; }
#guide table { width: 100%; border-collapse: collapse; font-size: 13px; min-width: 560px; }
#guide th, #guide td {
  padding: 9px 10px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
#guide th { background: var(--panel2); color: var(--text); font-weight: 600; }
#guide tbody tr:hover { background: rgba(255, 255, 255, .03); }
#guide ul { margin: 0; padding-left: 20px; }
#guide ul.tips li, #guide ul.cols li { margin-bottom: 8px; font-size: 13.5px; }
#guide ul.cols { columns: 2; column-gap: 24px; }
#guide details {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  margin-bottom: 8px;
  background: #12161c;
}
#guide details[open] { border-color: rgba(63, 140, 255, .35); }
#guide summary { cursor: pointer; font-size: 14px; color: var(--text); font-weight: 600; }
#guide summary:hover { color: #7fb2ff; }
#guide details p { margin: 10px 0 2px; color: #b9c3d1; font-size: 13.5px; }

#site-footer {
  background: #0d1015;
  border-top: 1px solid var(--border);
  padding: 22px 0 30px;
  text-align: center;
}
#site-footer .wrap { max-width: 900px; margin: 0 auto; padding: 0 22px; }
#site-footer p { margin: 0 0 6px; font-size: 12.5px; color: var(--muted); }

/* ---------- 新手教程 ---------- */
#tut-spot {
  position: fixed;
  display: none;
  border-radius: 10px;
  pointer-events: none;
  z-index: 9998;
  box-shadow: 0 0 0 9999px rgba(6, 9, 14, .62), inset 0 0 0 2px var(--accent);
  transition: left .18s ease, top .18s ease, width .18s ease, height .18s ease;
}
#tut-card {
  position: fixed;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  width: min(470px, calc(100vw - 32px));
  background: #1b212b;
  border: 1px solid rgba(63, 140, 255, .55);
  border-radius: 14px;
  padding: 16px 18px 14px;
  z-index: 9999;
  box-shadow: 0 16px 48px rgba(0, 0, 0, .55);
  color: var(--text);
}
#tut-card:empty { display: none; }
.tut-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 6px; }
.tut-no { font-size: 11.5px; color: var(--accent2); letter-spacing: .5px; }
.tut-x {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 14px;
  cursor: pointer;
  padding: 2px 4px;
  line-height: 1;
}
.tut-x:hover { color: var(--text); }
#tut-card h4 { margin: 0 0 8px; font-size: 16px; }
#tut-card p { margin: 0 0 12px; font-size: 13.5px; line-height: 1.7; color: #c6d0dd; }
#tut-card p strong { color: #fff; }
.tut-progress {
  height: 3px;
  background: rgba(255, 255, 255, .09);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 12px;
}
.tut-progress i {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  transition: width .25s ease;
}
.tut-actions { display: flex; gap: 8px; justify-content: flex-end; }
.tut-btn {
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  border: 1px solid var(--border);
  background: var(--panel2);
  color: var(--text);
}
.tut-btn:hover { border-color: var(--accent); }
.tut-btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.tut-btn.primary:hover { filter: brightness(1.08); }
.tut-btn.ghost { background: transparent; color: var(--muted); }

/* ---------- 窄屏 ---------- */
@media (max-width: 820px) {
  #app { flex-direction: column; height: auto; }
  #sidebar {
    width: 100%;
    min-width: 0;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .panel.grow { max-height: 42vh; }
  #viewport { height: 56vh; min-height: 320px; }
  #guide ul.cols { columns: 1; }
}

/* ---------- 文档页（隐私政策等） ---------- */
.doc-bar {
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.doc-bar .wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.doc-back {
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
}
.doc-back:hover { color: var(--accent); }
#guide h1 {
  margin: 0 0 10px;
  font-size: 24px;
  line-height: 1.3;
  color: var(--text);
}
#guide code {
  background: rgba(255, 255, 255, .07);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 12.5px;
  color: #9ecbff;
}
.footer-link {
  color: var(--muted);
  text-decoration: none;
  font-size: 12.5px;
  border-bottom: 1px dashed currentColor;
}
.footer-link:hover { color: var(--accent); }