:root {
  --bg: #0f141c;
  --panel: #171e29;
  --line: #2a3444;
  --text: #e8edf4;
  --mute: #9aa6b8;
  --acc: #3d8bfd;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.wrap { width: min(1100px, calc(100% - 32px)); margin: 0 auto; }
.bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 0; border-bottom: 1px solid var(--line);
}
.logo { font-weight: 700; letter-spacing: 0.12em; }
.logo small { display: block; font-weight: 400; color: var(--mute); font-size: 12px; letter-spacing: 0.2em; margin-top: 2px; }
nav { display: flex; flex-wrap: wrap; gap: 16px; font-size: 14px; color: var(--mute); }
nav a:hover { color: var(--acc); }
.hero {
  min-height: 68vh; display: grid; place-items: end start;
  background: #111 center/cover no-repeat; position: relative;
}
.hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(15,20,28,.2), rgba(15,20,28,.82)); }
.hero-copy { position: relative; z-index: 1; padding: 0 0 56px; }
.hero-copy p { color: var(--acc); letter-spacing: .2em; font-size: 13px; margin: 0 0 10px; }
.hero-copy h1 { margin: 0; font-size: clamp(32px, 5vw, 52px); font-weight: 700; }
.hero-copy span { display: block; margin-top: 12px; color: #c9d3e0; max-width: 34em; }
.sec { padding: 64px 0; }
.sec h2 { margin: 0 0 10px; font-size: 28px; }
.sec > .wrap > .lead { color: var(--mute); margin: 0 0 28px; }
.steps { display: grid; gap: 18px; }
.step { display: grid; grid-template-columns: 160px 1fr; gap: 20px; background: var(--panel); border: 1px solid var(--line); }
.step img { width: 100%; height: 140px; object-fit: cover; }
.step div { padding: 16px 18px 18px 0; }
.step b { color: var(--acc); display: block; margin-bottom: 6px; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.card { background: var(--panel); border: 1px solid var(--line); }
.card img { height: 240px; width: 100%; object-fit: cover; }
.card div { padding: 18px 20px 22px; }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--mute); font-size: 14px; }
.page-head { padding: 36px 0 8px; }
.prose { max-width: 760px; padding-bottom: 64px; }
.prose h3 { color: var(--acc); }
.prose p, .prose li { color: var(--mute); }
.form { display: grid; gap: 12px; max-width: 520px; }
.form input, .form textarea { background: var(--panel); border: 1px solid var(--line); color: var(--text); padding: 12px; font: inherit; }
.btn { border: 0; background: var(--acc); color: #071018; padding: 12px 18px; font: inherit; cursor: pointer; width: fit-content; font-weight: 600; }
footer { border-top: 1px solid var(--line); padding: 24px 0 36px; color: var(--mute); font-size: 13px; }
.foot { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.foot a { color: #c5d4ea; margin-right: 10px; }
@media (max-width: 800px) {
  .step, .grid { grid-template-columns: 1fr; }
  .step div { padding: 16px; }
  .hero { min-height: 54vh; }
}