:root {
  --bg: #0b0c12;
  --bg-2: #11131c;
  --card: #151824;
  --line: #242838;
  --text: #eceef3;
  --muted: #9aa1b4;
  --soft: #c9cddb;
  --accent: #d08cff;
  --accent-2: #7c3aed;
  --ok: #7dd3b0;
  --radius: 18px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: #e6c2ff; }
img { max-width: 100%; display: block; }
.wrap { width: min(1120px, 100% - 32px); margin: 0 auto; }

/* Header */
.top {
  position: sticky; top: 0; z-index: 10;
  background: rgba(11, 12, 18, 0.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(36, 40, 56, 0.7);
}
.top .wrap { display: flex; align-items: center; gap: 24px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; font-size: 18px; }
.brand img { width: 34px; height: 34px; }
.nav { display: flex; gap: 22px; margin-left: auto; font-size: 14px; }
.nav a { color: var(--soft); }
.nav a:hover { color: var(--text); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 44px; padding: 0 20px; border-radius: 12px;
  font-size: 15px; font-weight: 600; border: 1px solid transparent; cursor: pointer;
  transition: transform .15s ease, background .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: linear-gradient(135deg, var(--accent-2), #a855f7); color: #fff; }
.btn-primary:hover { color: #fff; }
.btn-ghost { border-color: var(--line); color: var(--text); background: rgba(255, 255, 255, 0.02); }
.btn-ghost:hover { color: var(--text); background: rgba(255, 255, 255, 0.05); }
.btn[aria-disabled="true"] { opacity: .55; cursor: default; transform: none; }
.top .btn { height: 38px; padding: 0 16px; font-size: 14px; }

/* Hero */
.hero { position: relative; overflow: hidden; padding: 88px 0 64px; }
.hero::before {
  content: ""; position: absolute; inset: -20% -10% auto; height: 640px; pointer-events: none;
  background: radial-gradient(520px 320px at 22% 30%, rgba(124, 58, 237, 0.35), transparent 70%),
              radial-gradient(520px 320px at 80% 20%, rgba(15, 36, 70, 0.9), transparent 70%);
}
.hero .wrap { position: relative; display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: center; }
.eyebrow { display: inline-flex; gap: 8px; align-items: center; padding: 4px 12px; border-radius: 999px; background: rgba(208, 140, 255, 0.12); color: #e4c7ff; font-size: 13px; }
.hero h1 { font-size: clamp(36px, 5vw, 58px); line-height: 1.15; margin: 18px 0 16px; letter-spacing: -0.02em; }
.hero h1 em { font-style: normal; background: linear-gradient(120deg, #e9c6ff, var(--accent) 45%, #7cc7ff); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { font-size: 18px; color: var(--soft); margin: 0 0 28px; max-width: 34em; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.cta-note { margin-top: 14px; font-size: 13px; color: var(--muted); }
.shot {
  position: relative; border-radius: 22px; padding: 10px;
  background: linear-gradient(160deg, rgba(208, 140, 255, 0.35), rgba(30, 42, 85, 0.5));
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55);
}
.shot img { border-radius: 14px; width: 100%; }
.shot .tag {
  position: absolute; left: 22px; bottom: 22px; padding: 8px 12px; border-radius: 10px;
  background: rgba(11, 12, 18, 0.78); font-size: 13px; color: var(--soft); backdrop-filter: blur(6px);
}
.shot .tag b { color: var(--text); }

/* Sections */
section { padding: 72px 0; }
.section-head { max-width: 640px; margin-bottom: 36px; }
.section-head h2 { font-size: clamp(26px, 3.4vw, 36px); margin: 0 0 10px; line-height: 1.25; }
.section-head p { color: var(--muted); margin: 0; }
.alt { background: var(--bg-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; counter-reset: step; }
.step { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 18px; }
.step::before { counter-increment: step; content: counter(step); display: inline-flex; width: 28px; height: 28px; border-radius: 50%; align-items: center; justify-content: center; background: rgba(124, 58, 237, 0.25); color: #e4c7ff; font-weight: 700; font-size: 14px; }
.step h3 { margin: 12px 0 6px; font-size: 17px; }
.step p { margin: 0; color: var(--muted); font-size: 14px; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.card .ico { width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center; background: rgba(208, 140, 255, 0.12); color: var(--accent); margin-bottom: 14px; }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.split .shot { padding: 8px; }
.checks { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 10px; }
.checks li { display: flex; gap: 10px; color: var(--soft); }
.checks li::before { content: ""; flex: 0 0 18px; height: 18px; margin-top: 4px; border-radius: 50%; background: rgba(125, 211, 176, 0.18) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%237dd3b0' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12l5 5 9-10'/%3E%3C/svg%3E") center / 11px no-repeat; }

/* Pricing */
.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; align-items: stretch; }
.plan { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 24px; display: flex; flex-direction: column; }
.plan.featured { border-color: rgba(208, 140, 255, 0.6); background: linear-gradient(180deg, rgba(124, 58, 237, 0.16), var(--card) 60%); position: relative; }
.plan.featured::after { content: "推荐"; position: absolute; top: 16px; right: 16px; font-size: 12px; padding: 2px 10px; border-radius: 999px; background: var(--accent-2); color: #fff; }
.plan h3 { margin: 0; font-size: 18px; }
.price { font-size: 38px; font-weight: 800; margin: 10px 0 2px; }
.price small { font-size: 15px; font-weight: 500; color: var(--muted); }
.plan .sub { color: var(--muted); font-size: 14px; margin-bottom: 16px; }
.plan .checks { margin-top: 4px; flex: 1; }
.plan .checks li { font-size: 14px; }
.fineprint { color: var(--muted); font-size: 13px; margin-top: 18px; }

table.points { width: 100%; border-collapse: collapse; margin-top: 8px; font-size: 14px; }
table.points td, table.points th { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); }
table.points th { color: var(--muted); font-weight: 500; }

/* Download */
.download { text-align: center; }
.download .cta { justify-content: center; margin-top: 8px; }
.req { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; text-align: left; margin-top: 32px; }

/* FAQ */
.faq { display: grid; gap: 10px; max-width: 820px; }
details { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 4px 20px; }
summary { cursor: pointer; padding: 14px 0; font-weight: 600; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; float: right; color: var(--muted); font-weight: 400; }
details[open] summary::after { content: "−"; }
details p { margin: 0 0 16px; color: var(--muted); }

/* Footer */
footer { border-top: 1px solid var(--line); padding: 36px 0 48px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 16px 32px; align-items: center; }
footer nav { display: flex; flex-wrap: wrap; gap: 18px; margin-left: auto; }
footer a { color: var(--soft); }

/* Legal pages */
.doc { max-width: 780px; padding: 56px 0 80px; }
.doc h1 { font-size: 32px; margin: 0 0 6px; }
.doc .updated { color: var(--muted); font-size: 14px; margin-bottom: 32px; }
.doc h2 { font-size: 20px; margin: 32px 0 10px; }
.doc p, .doc li { color: var(--soft); }
.doc ul { padding-left: 1.2em; }

@media (max-width: 920px) {
  .hero .wrap, .split { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .grid, .plans, .req { grid-template-columns: 1fr; }
  .nav { display: none; }
  .hero { padding-top: 56px; }
}
@media (max-width: 520px) {
  .steps { grid-template-columns: 1fr; }
  .top .btn { display: none; }
}