/* DTok — brand tokens mirror the app's design system (see .claude/rules/color-system.md) */
:root {
  --bg: #0F0F12;
  --bg-alt: #16161A;
  --card: #1E1E22;
  --card-hi: #2A2A30;
  --line: #2A2A30;
  --text: #FFFFFF;
  --text-2: #B3B3B3;
  --text-3: #808080;
  --brand: #8A2BE2;
  --brand-deep: #4A1A8A;
  --brand-soft: rgba(138, 43, 226, 0.12);
  --pink: #FF4081;
  --ok: #66BB6A;
  --radius: 14px;
  --maxw: 1120px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

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

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(15, 15, 18, 0.82);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav .wrap { display: flex; align-items: center; gap: 28px; height: 62px; }
.logo { font-weight: 800; font-size: 20px; letter-spacing: 3px; color: var(--brand); }
.nav-links { display: flex; gap: 22px; margin-left: auto; align-items: center; }
.nav-links a { color: var(--text-2); font-size: 14px; }
.nav-links a:hover { color: var(--text); }
.lang {
  border: 1px solid var(--line); border-radius: 8px;
  padding: 4px 10px; font-size: 13px; color: var(--text-2);
}
.lang:hover { border-color: var(--brand); color: var(--text); }

/* ---------- hero ---------- */
.hero { padding: 84px 0 64px; position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -40% 40% 40% -10%;
  background: radial-gradient(closest-side, rgba(138,43,226,.22), transparent 70%);
  pointer-events: none;
}
.eyebrow {
  font-size: 12px; letter-spacing: 3px; text-transform: uppercase;
  color: var(--text-3); margin-bottom: 18px;
}
h1 { font-size: clamp(34px, 5.2vw, 58px); line-height: 1.15; font-weight: 800; letter-spacing: -0.5px; }
h1 .grad {
  background: linear-gradient(120deg, var(--brand), #C77DFF);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lede { color: var(--text-2); font-size: 18px; max-width: 620px; margin-top: 20px; }
.rule { width: 56px; height: 3px; background: var(--brand); border-radius: 2px; margin: 26px 0; }

.pills { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.pill {
  border: 1px solid var(--line); border-radius: 999px;
  padding: 6px 14px; font-size: 13px; color: var(--text-2);
}
.pill.on { border-color: var(--brand); color: #D9B8FF; background: var(--brand-soft); }

/* ---------- SKU split ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 48px; }
.sku {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px; transition: .18s;
}
.sku:hover { border-color: var(--brand); transform: translateY(-2px); }
.sku h3 { font-size: 20px; margin-bottom: 6px; }
.sku .who { color: var(--brand); font-size: 13px; font-weight: 600; margin-bottom: 14px; }
.sku p { color: var(--text-2); font-size: 15px; }
.sku .go { display: inline-block; margin-top: 18px; font-size: 14px; color: var(--text); font-weight: 600; }
.sku .go::after { content: " →"; color: var(--brand); }

/* ---------- sections ---------- */
section { padding: 72px 0; border-top: 1px solid var(--line); }
section.plain { border-top: none; }
h2 { font-size: clamp(24px, 3.2vw, 34px); font-weight: 800; letter-spacing: -0.3px; }
.sub { color: var(--text-2); margin-top: 12px; max-width: 680px; }

.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 36px; }
.grid2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: 36px; }
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 24px;
}
.card h4 { font-size: 16px; margin-bottom: 10px; }
.card p, .card li { color: var(--text-2); font-size: 14px; }
.card ul { list-style: none; }
.card li { padding-left: 16px; position: relative; }
.card li::before { content: "·"; position: absolute; left: 4px; color: var(--brand); }

/* platforms strip */
.plat { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.plat div {
  flex: 1 1 150px; text-align: center; padding: 18px 12px;
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  font-weight: 600; font-size: 15px;
}
.plat div span { display: block; color: var(--ok); font-size: 12px; font-weight: 400; margin-top: 4px; }

/* table */
table { width: 100%; border-collapse: collapse; margin-top: 32px; font-size: 14px; }
th, td { text-align: left; padding: 14px 16px; border-bottom: 1px solid var(--line); }
th { color: var(--text-3); font-weight: 600; font-size: 13px; }
td.hl { color: #D9B8FF; font-weight: 600; }
tr.us { background: var(--brand-soft); }
tr.us td:first-child { font-weight: 700; }

/* pricing */
.tiers { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 36px; }
.tier {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px; display: flex; flex-direction: column;
}
.tier.best { border-color: var(--brand); background: linear-gradient(180deg, var(--brand-soft), var(--card) 60%); }
.tier .tag {
  font-size: 11px; letter-spacing: 1px; text-transform: uppercase;
  color: var(--brand); font-weight: 700; margin-bottom: 10px; min-height: 16px;
}
.tier h4 { font-size: 20px; margin-bottom: 4px; }
.tier .note { color: var(--text-3); font-size: 13px; margin-bottom: 18px; }
.tier ul { list-style: none; flex: 1; }
.tier li { color: var(--text-2); font-size: 14px; padding: 5px 0 5px 22px; position: relative; }
.tier li::before { content: "✓"; position: absolute; left: 0; color: var(--ok); }
.tier li.no { color: var(--text-3); }
.tier li.no::before { content: "—"; color: var(--text-3); }

/* buttons */
.btn {
  display: inline-block; padding: 13px 26px; border-radius: 10px;
  font-weight: 600; font-size: 15px; transition: .18s;
}
.btn-primary { background: linear-gradient(120deg, var(--brand), var(--brand-deep)); color: #fff; }
.btn-primary:hover { filter: brightness(1.12); transform: translateY(-1px); }
.btn-ghost { border: 1px solid var(--line); color: var(--text-2); }
.btn-ghost:hover { border-color: var(--brand); color: var(--text); }
.btns { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }

/* cta */
.cta {
  background: linear-gradient(120deg, rgba(138,43,226,.16), rgba(74,26,138,.16));
  border: 1px solid var(--brand); border-radius: 18px;
  padding: 48px 40px; text-align: center; margin: 72px 0;
}
.cta h2 { margin-bottom: 12px; }
.cta p { color: var(--text-2); max-width: 520px; margin: 0 auto; }

/* footer */
footer { border-top: 1px solid var(--line); padding: 40px 0 56px; color: var(--text-3); font-size: 13px; }
footer .cols { display: flex; gap: 40px; flex-wrap: wrap; justify-content: space-between; }
footer a { color: var(--text-2); }
footer a:hover { color: var(--text); }
footer .links { display: flex; gap: 20px; flex-wrap: wrap; }

.note-box {
  border-left: 3px solid var(--brand); background: var(--bg-alt);
  padding: 16px 20px; border-radius: 0 10px 10px 0; margin-top: 28px;
  color: var(--text-2); font-size: 14px;
}

@media (max-width: 860px) {
  .split, .grid3, .grid2, .tiers { grid-template-columns: 1fr; }
  .nav-links a:not(.lang) { display: none; }
  .hero { padding: 56px 0 44px; }
  section { padding: 56px 0; }
  .cta { padding: 36px 24px; }
}

/* ---------- form ---------- */
.form-wrap { max-width: 720px; margin: 0 auto; }
.field { margin-bottom: 20px; }
.field label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; }
.field .hint { color: var(--text-3); font-size: 13px; font-weight: 400; margin-left: 6px; }
.field input[type=text], .field textarea, .field select {
  width: 100%; background: var(--card); color: var(--text);
  border: 1px solid var(--line); border-radius: 10px;
  padding: 12px 14px; font-size: 15px; font-family: inherit;
}
.field textarea { min-height: 130px; resize: vertical; line-height: 1.6; }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-soft);
}
.field input::placeholder, .field textarea::placeholder { color: var(--text-3); }
.opts { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.opt {
  border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px;
  cursor: pointer; transition: .15s; background: var(--card);
}
.opt:hover { border-color: var(--brand); }
.opt input { position: absolute; opacity: 0; }
.opt strong { display: block; font-size: 15px; margin-bottom: 3px; }
.opt span { color: var(--text-2); font-size: 13px; }
.opt.sel { border-color: var(--brand); background: var(--brand-soft); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.privacy {
  display: flex; gap: 10px; align-items: flex-start;
  background: var(--bg-alt); border-left: 3px solid var(--ok);
  padding: 14px 18px; border-radius: 0 10px 10px 0;
  color: var(--text-2); font-size: 14px; margin-bottom: 28px;
}
.form-msg { margin-top: 16px; font-size: 14px; display: none; }
.form-msg.err { color: #EF5350; display: block; }
.done { display: none; text-align: center; padding: 48px 0; }
.done.on { display: block; }
.done .tick { font-size: 44px; color: var(--ok); }
.done h2 { margin: 14px 0 10px; }
.done p { color: var(--text-2); }
button.btn { border: none; cursor: pointer; font-family: inherit; }
button.btn:disabled { opacity: .6; cursor: default; }
@media (max-width: 640px) { .opts { grid-template-columns: 1fr; } }

/* 场景卡片作为链接时的交互反馈 */
a.card { display: block; transition: .18s; }
a.card:hover { border-color: var(--brand); transform: translateY(-2px); }
a.card h4 { color: var(--text); }