/* No external fonts or CDNs: Google and many CDNs are unreachable from mainland China. */
:root {
  --ink: #14213d; --ink-2: #3a4663; --muted: #6b7280; --bg: #fbf9f4; --card: #ffffff;
  --gold: #c9a54a; --gold-ink: #7a5d14; --line: #e7e1d3; --ok: #1f7a4d; --no: #a12a2a; --warn: #8a5a00;
  --radius: 14px;
  --serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "STSong", Georgia, serif;
  --sans: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root { --ink: #f1ede3; --ink-2: #cfd5e3; --muted: #9aa3b2; --bg: #0f1526; --card: #172038; --line: #2a3554; --gold-ink: #e3c977; }
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.65 var(--sans); }
a { color: inherit; }
h1, h2, h3 { font-family: var(--serif); line-height: 1.25; margin: 0 0 .5em; }
.top { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 16px; padding: 12px 24px;
  background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 8px; font-family: var(--serif); font-size: 20px; text-decoration: none; font-weight: 600; }
.brand svg { width: 22px; height: 22px; fill: var(--gold); }
nav { display: flex; gap: 18px; margin-left: auto; }
nav a { text-decoration: none; color: var(--ink-2); font-size: 15px; }
nav a.active, nav a:hover { color: var(--ink); box-shadow: inset 0 -2px var(--gold); }
.lang { border: 1px solid var(--line); background: var(--card); color: var(--ink); border-radius: 999px; padding: 4px 12px; cursor: pointer; }
.menu { display: none; margin-left: auto; background: none; border: 0; font-size: 22px; color: var(--ink); }
main { max-width: 1080px; margin: 0 auto; padding: 32px 24px 64px; outline: none; }
.hero { padding: 56px 0 40px; display: grid; gap: 20px; }
.kicker { color: var(--gold-ink); letter-spacing: .08em; font-size: 14px; text-transform: uppercase; }
.hero h1 { font-size: clamp(32px, 6vw, 56px); }
.hero p { font-size: 18px; color: var(--ink-2); max-width: 680px; margin: 0; }
.btns { display: flex; gap: 12px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 12px 22px; border-radius: 999px; border: 1px solid var(--ink); background: var(--ink); color: var(--bg);
  text-decoration: none; cursor: pointer; font: inherit; font-weight: 600; }
.btn.ghost { background: transparent; color: var(--ink); }
.btn.gold { background: var(--gold); border-color: var(--gold); color: #1a1405; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }
.grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.card h3 { font-size: 20px; }
.course .price { font-family: var(--serif); font-size: 26px; }
.course .meta { color: var(--muted); font-size: 14px; display: flex; flex-wrap: wrap; gap: 4px 12px; margin: 8px 0 14px; }
.tag { display: inline-block; font-size: 12px; padding: 2px 10px; border-radius: 999px; border: 1px solid var(--gold); color: var(--gold-ink); margin-bottom: 8px; }
.note { color: var(--muted); font-size: 14px; }
.honest { border-left: 3px solid var(--gold); padding: 8px 14px; color: var(--ink-2); font-size: 14px; background: var(--card); }
section { margin: 48px 0; }
form { display: grid; gap: 14px; max-width: 520px; }
label { display: grid; gap: 4px; font-size: 14px; color: var(--ink-2); }
label.check { grid-template-columns: 20px 1fr; align-items: start; gap: 8px; }
input, select, textarea { font: inherit; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--card); color: var(--ink); width: 100%; }
input[type=checkbox], input[type=radio] { width: auto; margin-top: 4px; }
.hp { position: absolute; left: -9999px; }
.ok { color: var(--ok); } .no { color: var(--no); } .warn { color: var(--warn); }
.pill { font-size: 12px; padding: 2px 10px; border-radius: 999px; border: 1px solid currentColor; display: inline-block; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
.tablewrap { overflow-x: auto; }
.q { margin-bottom: 18px; } .q p { margin: 0 0 6px; font-weight: 600; }
.q label { display: inline-flex; grid-template-columns: none; gap: 6px; margin-right: 14px; color: var(--ink); }
.list li { margin: 6px 0; }
footer { border-top: 1px solid var(--line); padding: 28px 24px; text-align: center; color: var(--muted); font-size: 14px; }
footer a { margin: 0 8px; }
.toast { padding: 12px 16px; border-radius: 10px; background: var(--card); border: 1px solid var(--line); margin: 12px 0; }
@media (max-width: 760px) {
  .top { flex-wrap: wrap; padding: 10px 16px; }
  .menu { display: block; }
  nav { display: none; width: 100%; flex-direction: column; gap: 10px; padding: 8px 0; order: 3; }
  nav.open { display: flex; }
  .lang { order: 2; }
  main { padding: 20px 16px 48px; }
  .hero { padding: 24px 0; }
}