/* Stock Agent 官网 - 暗色科幻风 */
:root {
  --bg: #02070a;
  --panel: rgba(6, 20, 24, .72);
  --ink: #b0d0d2;
  --dim: #536d72;
  --line: rgba(170, 214, 216, .22);
  --accent: #59d8de;
  --accent-glow: rgba(89, 216, 222, .35);
  --red: #ff4646;
  --mono: "SFMono-Regular", "Fira Code", "Noto Sans Mono", Menlo, monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; min-height: 100%; }
body {
  background:
    radial-gradient(ellipse at 50% -10%, rgba(14, 48, 53, .5), transparent 55%),
    radial-gradient(circle, rgba(164, 211, 214, .13) 1px, transparent 1.4px) 0 0 / 28px 28px,
    var(--bg);
  color: var(--ink);
  font: 16px/1.75 "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}
a { color: var(--accent); text-decoration: none; }

.nav {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 26px;
  padding: 16px 4vw; border-bottom: 1px solid var(--line);
  background: rgba(2, 7, 10, .85); backdrop-filter: blur(8px);
}
.nav .brand { font-family: var(--mono); font-size: 19px; letter-spacing: .14em; color: var(--ink); margin-right: 12px; }
.nav .brand b { color: var(--accent); font-weight: 400; }
.nav a.item { color: var(--dim); font-size: 14.5px; letter-spacing: .06em; transition: color .2s; }
.nav a.item:hover { color: var(--ink); }
.nav a.item.on { color: var(--accent); }
.nav .spacer { flex: 1; }
.nav .cta {
  padding: 8px 18px; border: 1px solid var(--accent); border-radius: 6px;
  color: var(--accent); font-size: 14px; letter-spacing: .08em;
  transition: background .2s, box-shadow .2s;
}
.nav .cta:hover { background: rgba(89, 216, 222, .14); box-shadow: 0 0 16px var(--accent-glow); }

.hero { text-align: center; padding: 96px 5vw 72px; }
.hero .tag { color: var(--accent); font: 14px var(--mono); letter-spacing: .5em; }
.hero h1 {
  margin: 18px 0 10px; font-size: clamp(34px, 6vw, 62px); font-weight: 600; letter-spacing: .06em;
  background: linear-gradient(180deg, #d8f2f4, #59d8de 80%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  text-shadow: 0 0 42px rgba(89, 216, 222, .25);
}
.hero p.sub { max-width: 640px; margin: 0 auto; color: var(--dim); font-size: 17px; }
.hero .actions { margin-top: 40px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 13px 34px; border-radius: 6px; font-size: 15px; letter-spacing: .12em;
  border: 1px solid var(--accent); color: var(--accent); transition: all .2s;
}
.btn.solid { background: rgba(89, 216, 222, .14); }
.btn:hover { background: rgba(89, 216, 222, .24); box-shadow: 0 0 22px var(--accent-glow); }
.btn.ghost { border-color: var(--line); color: var(--dim); }
.btn.ghost:hover { color: var(--ink); border-color: var(--ink); box-shadow: none; }

.wrap { max-width: 1160px; margin: 0 auto; padding: 0 4vw; }
.grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 22px; margin: 30px 0 70px; }
.card {
  position: relative; padding: 30px 28px; border: 1px solid var(--line); border-radius: 10px;
  background: var(--panel); transition: transform .25s, border-color .25s, box-shadow .25s;
}
.card:hover { transform: translateY(-4px); border-color: var(--accent); box-shadow: 0 12px 40px rgba(0, 0, 0, .5), 0 0 24px rgba(89, 216, 222, .12); }
.card .icon { font: 26px var(--mono); color: var(--accent); }
.card h3 { margin: 12px 0 8px; font-size: 19px; font-weight: 500; letter-spacing: .08em; }
.card p { margin: 0 0 16px; color: var(--dim); font-size: 14.5px; }
.card .more { font-size: 14px; font-family: var(--mono); }
.card .badge { position: absolute; top: 18px; right: 18px; font-size: 12px; color: var(--dim); border: 1px solid var(--line); border-radius: 4px; padding: 1px 8px; }

.sec-h { text-align: center; margin: 80px 0 8px; font-size: 28px; font-weight: 500; letter-spacing: .18em; }
.sec-sub { text-align: center; color: var(--dim); margin: 0 0 34px; font-size: 15px; }

.demo-frame {
  width: 100%; aspect-ratio: 16 / 9; border: 1px solid var(--line); border-radius: 10px;
  background: #000; box-shadow: 0 18px 60px rgba(0, 0, 0, .6), 0 0 40px rgba(89, 216, 222, .08);
}
.feature-list { max-width: 860px; margin: 40px auto 80px; display: grid; gap: 14px; }
.feature-list .f {
  display: flex; gap: 14px; padding: 18px 22px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel);
}
.feature-list .f b { color: var(--accent); font-family: var(--mono); font-weight: 400; white-space: nowrap; }
.feature-list .f span { color: var(--dim); font-size: 14.5px; }

.mission { max-width: 820px; margin: 0 auto 80px; padding: 36px 40px; border-left: 2px solid var(--accent); background: var(--panel); color: var(--dim); font-size: 15px; }
.mission b { color: var(--ink); font-weight: 500; }

table.price { width: 100%; border-collapse: collapse; font-size: 14px; margin: 8px 0 28px; }
table.price th { text-align: left; padding: 10px 12px; color: var(--dim); font-weight: 400; letter-spacing: .1em; border-bottom: 1px solid var(--line); }
table.price td { padding: 10px 12px; border-bottom: 1px solid rgba(170, 214, 216, .08); font-family: var(--mono); }
.model-name { font: 17px var(--mono); color: var(--accent); margin: 30px 0 4px; }

.wip { text-align: center; padding: 110px 20px 130px; }
.wip .big { font: 46px var(--mono); color: var(--accent); letter-spacing: .2em; text-shadow: 0 0 30px var(--accent-glow); }
.wip p { color: var(--dim); max-width: 560px; margin: 18px auto 0; }
.blink::after { content: "▋"; animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

.footer { margin-top: 60px; padding: 34px 4vw 40px; border-top: 1px solid var(--line); text-align: center; color: var(--dim); font-size: 13px; }
.footer a { color: var(--dim); }
.footer a:hover { color: var(--ink); }
@media (max-width: 860px) {
  .nav { flex-wrap: wrap; gap: 12px 18px; }
  .hero { padding-top: 60px; }
}