:root {
  color-scheme: dark;
  --bg: #020817;
  --panel: rgba(8, 28, 55, .86);
  --line: rgba(71, 133, 194, .28);
  --text: #edf7ff;
  --muted: #8fa6c0;
  --blue: #368cff;
  --cyan: #21d5e8;
  --violet: #a26bff;
  font-family: Inter, "SF Pro Display", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 20% -5%, rgba(27, 112, 224, .2), transparent 34%),
    radial-gradient(circle at 82% 8%, rgba(105, 59, 211, .14), transparent 27%),
    linear-gradient(180deg, #020817, #06152a 58%, #030b18);
}

a { color: inherit; }
.page-shell { min-height: 100vh; display: flex; flex-direction: column; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  min-height: 64px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  padding: 0 6vw;
  border-bottom: 1px solid rgba(77, 136, 193, .2);
  background: rgba(2, 10, 24, .86);
  backdrop-filter: blur(18px);
}

.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 760; font-size: 18px; }
.brand-mark { width: 34px; height: 34px; display: grid; place-items: center; border: 1px solid rgba(46, 165, 255, .5); border-radius: 10px; background: rgba(33, 111, 213, .16); box-shadow: 0 0 20px rgba(40, 139, 255, .14); }
.brand-mark svg { width: 21px; fill: none; stroke: #54c9ff; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.brand-mark circle { fill: #54c9ff; stroke: none; }

nav { display: flex; gap: 34px; }
nav a { color: #9cb0c8; text-decoration: none; font-size: 14px; transition: color .2s ease; }
nav a:hover { color: #d9f5ff; }
.status { justify-self: end; display: inline-flex; align-items: center; gap: 8px; color: #91dbbb; font-size: 13px; }
.status i { width: 7px; height: 7px; border-radius: 50%; background: #43df91; box-shadow: 0 0 12px #43df91; }

main { width: min(1180px, 88vw); margin: 0 auto; flex: 1; }
.hero { min-height: 610px; display: grid; grid-template-columns: .86fr 1.14fr; align-items: center; gap: 7vw; padding: 74px 0 54px; }
.eyebrow, .section-heading > span, .notice > div > span { color: #55caff; font-size: 12px; letter-spacing: .18em; text-transform: uppercase; }
.hero h1 { margin: 18px 0 22px; font-size: clamp(42px, 5.2vw, 70px); line-height: 1.08; letter-spacing: -.045em; }
.hero h1 em { color: transparent; font-style: normal; background: linear-gradient(90deg, #69d4ff, #638dff 56%, #b27cff); -webkit-background-clip: text; background-clip: text; }
.hero-copy > p { max-width: 560px; margin: 0; color: #9ab0ca; font-size: 16px; line-height: 1.9; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 30px; }
.hero-tags span { padding: 8px 13px; border: 1px solid rgba(72, 142, 212, .28); border-radius: 999px; background: rgba(10, 33, 64, .68); color: #bad0e6; font-size: 12px; }

.dashboard-preview { position: relative; padding: 20px; border: 1px solid rgba(79, 151, 222, .32); border-radius: 18px; background: linear-gradient(145deg, rgba(10, 35, 68, .94), rgba(4, 18, 38, .94)); box-shadow: 0 28px 80px rgba(0, 0, 0, .32), inset 0 1px 0 rgba(255, 255, 255, .04); overflow: hidden; }
.dashboard-preview::before { content: ""; position: absolute; inset: 0 30% auto -20%; height: 120px; background: radial-gradient(circle, rgba(39, 143, 255, .18), transparent 70%); pointer-events: none; }
.preview-head, .trend-title { display: flex; align-items: center; justify-content: space-between; }
.preview-head div { display: grid; gap: 4px; }
.preview-head small, .trend-title span { color: #6e87a5; }
.preview-head strong { font-size: 20px; }
.preview-head > span { padding: 6px 10px; border: 1px solid rgba(61, 150, 239, .35); border-radius: 7px; color: #7dd5ff; background: rgba(25, 103, 181, .16); font-size: 11px; }
.metric-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 18px 0 10px; }
.metric-row article { display: grid; gap: 5px; padding: 15px; border: 1px solid var(--line); border-radius: 10px; background: rgba(7, 24, 48, .82); }
.metric-row small { color: #7791ad; }
.metric-row strong { color: #effaff; font-size: 19px; }
.metric-row em { color: #4eb9ea; font-size: 10px; font-style: normal; }
.trend-card { padding: 15px; border: 1px solid var(--line); border-radius: 10px; background: rgba(5, 21, 42, .8); }
.trend-title { margin-bottom: 4px; }
.trend-card svg { width: 100%; height: 168px; overflow: visible; }
.trend-card .grid { fill: none; stroke: rgba(91, 139, 183, .14); stroke-width: 1; }
.trend-card .area { fill: url(#area); }
.trend-card .line { fill: none; stroke: #37a0ff; stroke-width: 3; filter: drop-shadow(0 0 6px rgba(41, 145, 255, .55)); }
.trend-card circle { fill: #9be8ff; stroke: #157ede; stroke-width: 3; }
.preview-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 12px; color: #96aac0; font-size: 11px; }
.preview-list span { display: flex; align-items: center; gap: 7px; }
.preview-list i { width: 7px; height: 7px; border-radius: 50%; }
.preview-list .blue { background: var(--blue); }.preview-list .cyan { background: var(--cyan); }.preview-list .violet { background: var(--violet); }

.feature-section { padding: 74px 0 80px; border-top: 1px solid rgba(78, 135, 188, .16); }
.section-heading { max-width: 640px; margin-bottom: 34px; }
.section-heading h2, .notice h2 { margin: 10px 0 0; font-size: clamp(28px, 3vw, 40px); letter-spacing: -.025em; }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.feature-grid article { min-height: 210px; padding: 24px; border: 1px solid var(--line); border-radius: 13px; background: var(--panel); }
.feature-icon { color: #4ec4ff; font-size: 12px; letter-spacing: .12em; }
.feature-grid h3 { margin: 34px 0 12px; font-size: 19px; }
.feature-grid p { margin: 0; color: var(--muted); line-height: 1.75; }

.notice { display: grid; grid-template-columns: 1fr 1.5fr; align-items: center; gap: 48px; margin: 0 0 78px; padding: 32px 36px; border: 1px solid rgba(62, 146, 222, .3); border-radius: 14px; background: linear-gradient(110deg, rgba(11, 45, 82, .82), rgba(15, 27, 57, .76)); }
.notice p { margin: 0; color: #9db3ca; line-height: 1.85; font-size: 14px; }

.site-footer { min-height: 82px; display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 12px 28px; padding: 20px; border-top: 1px solid rgba(72, 129, 183, .2); background: rgba(2, 8, 18, .72); color: #71869e; font-size: 12px; text-align: center; }
.site-footer p { margin: 0; }
.site-footer a { color: #8ea9c3; text-underline-offset: 3px; }
.site-footer a:hover { color: #c4eaff; }

@media (max-width: 900px) {
  .site-header { grid-template-columns: 1fr auto; padding: 0 5vw; }
  nav { display: none; }
  .hero { grid-template-columns: 1fr; gap: 46px; padding-top: 62px; }
  .hero-copy { text-align: center; }
  .hero-copy > p { margin-inline: auto; }
  .hero-tags { justify-content: center; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .notice { grid-template-columns: 1fr; gap: 20px; }
}

@media (max-width: 560px) {
  main { width: min(92vw, 1180px); }
  .site-header { min-height: 58px; }
  .status { font-size: 0; }
  .hero { padding-top: 42px; }
  .hero h1 { font-size: 39px; }
  .hero-copy > p { font-size: 14px; }
  .dashboard-preview { padding: 13px; border-radius: 13px; }
  .metric-row { grid-template-columns: 1fr; }
  .metric-row article { grid-template-columns: 1fr auto; align-items: center; }
  .metric-row em { grid-column: 1 / -1; }
  .trend-card svg { height: 120px; }
  .preview-list { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-grid article { min-height: 175px; }
  .notice { padding: 25px; }
  .site-footer { flex-direction: column; gap: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}