/* =============================================================================
   Rian-Minichat-X1 官网样式
   纯 CSS，无框架、无 CDN 依赖（服务器在国内也能秒开）
   ========================================================================== */

:root {
  --bg: #0b0f14;
  --bg-soft: #111823;
  --bg-card: #161f2c;
  --border: #24303f;
  --text: #e6edf3;
  --text-dim: #93a1b1;
  --text-faint: #6b7a8c;
  --accent: #4d8dff;
  --accent-soft: rgba(77, 141, 255, 0.12);
  --green: #34d399;
  --amber: #fbbf24;
  --red: #f87171;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --radius: 10px;
  --max: 1080px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

code, pre { font-family: var(--mono); font-size: 13px; }

pre {
  background: #0d131b;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  overflow-x: auto;
  line-height: 1.6;
}

code:not(pre code) {
  background: rgba(255, 255, 255, 0.06);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
}

/* ---------------- 布局 ---------------- */
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

header.nav {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(11, 15, 20, 0.85);
  backdrop-filter: blur(12px);
  z-index: 50;
}

header.nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 15px;
  color: var(--text);
}
.brand:hover { text-decoration: none; }

.brand .mark {
  width: 26px; height: 26px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--accent), #7c5cff);
  display: grid;
  place-items: center;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
}

nav.links { display: flex; gap: 26px; align-items: center; }
nav.links a { color: var(--text-dim); font-size: 14px; }
nav.links a:hover { color: var(--text); text-decoration: none; }
nav.links a.active { color: var(--text); }

.btn {
  display: inline-block;
  padding: 9px 18px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  cursor: pointer;
  transition: all .15s ease;
}
.btn:hover { border-color: #3a4c63; text-decoration: none; }
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn.primary:hover { background: #3d7ef5; }
.btn.danger { color: var(--red); border-color: rgba(248, 113, 113, .35); }
.btn.small { padding: 5px 12px; font-size: 13px; }
.btn:disabled { opacity: .45; cursor: not-allowed; }

/* ---------------- Hero ---------------- */
.hero { padding: 84px 0 64px; }
.hero h1 {
  font-size: 44px;
  line-height: 1.25;
  margin: 0 0 20px;
  letter-spacing: -0.5px;
}
.hero h1 .grad {
  background: linear-gradient(120deg, #4d8dff, #7c5cff 60%, #34d399);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p.lead {
  font-size: 17px;
  color: var(--text-dim);
  max-width: 720px;
  margin: 0 0 32px;
}
.hero .cta { display: flex; gap: 12px; flex-wrap: wrap; }

.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  border: 1px solid rgba(77, 141, 255, .3);
  color: #9dc0ff;
  font-size: 12.5px;
  margin-bottom: 20px;
}

/* ---------------- 卡片 / 网格 ---------------- */
section { padding: 56px 0; }
section.tight { padding: 32px 0; }
h2.section-title {
  font-size: 26px;
  margin: 0 0 8px;
  letter-spacing: -0.3px;
}
p.section-sub { color: var(--text-dim); margin: 0 0 32px; }

.grid { display: grid; gap: 16px; }
.grid.c2 { grid-template-columns: repeat(2, 1fr); }
.grid.c3 { grid-template-columns: repeat(3, 1fr); }
.grid.c4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}
.card h3 { margin: 0 0 8px; font-size: 16px; }
.card p { margin: 0; color: var(--text-dim); font-size: 14px; }
.card .ico {
  width: 34px; height: 34px;
  border-radius: 9px;
  background: var(--accent-soft);
  color: var(--accent);
  display: grid; place-items: center;
  font-size: 16px;
  margin-bottom: 14px;
}

/* ---------------- 表格 ---------------- */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
th, td {
  text-align: left;
  padding: 11px 14px;
  border-bottom: 1px solid var(--border);
}
th { color: var(--text-dim); font-weight: 500; font-size: 13px; }
td.mono, th.mono { font-family: var(--mono); font-size: 13px; }
tr:last-child td { border-bottom: none; }

.table-wrap {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-card);
}

/* ---------------- 提示条 ---------------- */
.note {
  border-left: 3px solid var(--amber);
  background: rgba(251, 191, 36, .07);
  padding: 14px 18px;
  border-radius: 0 8px 8px 0;
  color: #e8d9a8;
  font-size: 14px;
  margin: 20px 0;
}
.note.info { border-left-color: var(--accent); background: var(--accent-soft); color: #b8d1ff; }
.note.danger { border-left-color: var(--red); background: rgba(248, 113, 113, .08); color: #ffc9c9; }

/* ---------------- 表单 ---------------- */
label.field { display: block; margin-bottom: 18px; }
label.field span.lbl {
  display: block;
  font-size: 13.5px;
  color: var(--text-dim);
  margin-bottom: 7px;
}
input[type="text"], input[type="email"], input[type="password"], textarea, select {
  width: 100%;
  padding: 10px 13px;
  background: #0d131b;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.help { font-size: 12.5px; color: var(--text-faint); margin-top: 6px; }

/* ---------------- 代码块标签 ---------------- */
.code-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #0d131b;
  border: 1px solid var(--border);
  border-bottom: none;
  border-radius: var(--radius) var(--radius) 0 0;
  padding: 9px 14px;
  font-size: 12.5px;
  color: var(--text-faint);
  font-family: var(--mono);
}
.code-head + pre {
  border-top-left-radius: 0;
  border-top-right-radius: 0;
  margin-top: 0;
}
.copy-btn {
  background: none;
  border: none;
  color: var(--text-faint);
  cursor: pointer;
  font-size: 12.5px;
  font-family: inherit;
}
.copy-btn:hover { color: var(--accent); }

/* ---------------- 状态标签 ---------------- */
.tag {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 12px;
  border: 1px solid transparent;
}
.tag.ok { background: rgba(52, 211, 153, .12); color: var(--green); border-color: rgba(52, 211, 153, .3); }
.tag.off { background: rgba(148, 163, 184, .12); color: var(--text-faint); border-color: rgba(148, 163, 184, .25); }
.tag.warn { background: rgba(251, 191, 36, .12); color: var(--amber); border-color: rgba(251, 191, 36, .3); }

/* ---------------- 页脚 ---------------- */
footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  color: var(--text-faint);
  font-size: 13.5px;
}
footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
footer a { color: var(--text-dim); }

/* ---------------- 工具类 ---------------- */
.mono { font-family: var(--mono); }
.dim { color: var(--text-dim); }
.faint { color: var(--text-faint); }
.center { text-align: center; }
.mt24 { margin-top: 24px; }
.mb0 { margin-bottom: 0; }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.spread { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.hide { display: none !important; }
.small { font-size: 13px; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 860px) {
  .hero { padding: 56px 0 40px; }
  .hero h1 { font-size: 32px; }
  .grid.c2, .grid.c3, .grid.c4 { grid-template-columns: 1fr; }
  nav.links { gap: 16px; }
  nav.links a { font-size: 13px; }
  .wrap { padding: 0 18px; }
}