:root {
  --bg-deep: #030712;
  --bg-panel: rgba(15, 23, 42, 0.72);
  --bg-card: rgba(30, 41, 59, 0.48);
  --primary: #0ea5e9;
  --primary-2: #6366f1;
  --accent: #22d3ee;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --text: #f8fafc;
  --text-muted: #94a3b8;
  --border: rgba(148, 163, 184, 0.14);
  --radius: 16px;
  --shadow: 0 8px 32px rgba(2, 8, 20, 0.48);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg-deep);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
img { max-width: 100%; }

.glass {
  background: var(--bg-panel);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent), var(--primary), var(--primary-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gradient-border {
  position: relative;
}
.gradient-border::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  padding: 1px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.container { width: 92%; max-width: 1280px; margin: 0 auto; }

/* Header */
header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: 72px;
  display: flex;
  align-items: center;
  background: rgba(3, 7, 18, 0.82);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
header .container { display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: 12px; }
.logo img { height: 40px; width: auto; }
.logo span { font-size: 1.4rem; font-weight: 800; letter-spacing: 0.5px; }
nav ul { display: flex; gap: 28px; align-items: center; }
nav a { color: var(--text-muted); font-size: 0.92rem; font-weight: 500; transition: color .2s; }
nav a:hover, nav a.active { color: var(--text); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 22px; border-radius: 999px; border: none; cursor: pointer;
  font-weight: 600; font-size: 0.92rem; transition: transform .2s, box-shadow .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff; box-shadow: 0 4px 20px rgba(14, 165, 233, 0.35);
}
.btn-ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-sm { padding: 6px 14px; font-size: 0.82rem; }

/* Hero */
.hero {
  position: relative;
  padding: 160px 0 120px;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(14, 165, 233, 0.18) 0%, transparent 40%),
    radial-gradient(circle at 80% 20%, rgba(99, 102, 241, 0.16) 0%, transparent 40%),
    radial-gradient(circle at 50% 80%, rgba(34, 211, 238, 0.10) 0%, transparent 45%);
  z-index: -1;
}
.hero-grid {
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 60px; align-items: center;
}
.hero h1 { font-size: 3.2rem; line-height: 1.12; margin: 0 0 24px; font-weight: 800; }
.hero p { font-size: 1.15rem; color: var(--text-muted); max-width: 560px; margin-bottom: 32px; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 40px; margin-top: 48px; }
.hero-stats div strong { display: block; font-size: 1.8rem; font-weight: 800; }
.hero-stats div span { font-size: 0.85rem; color: var(--text-muted); }
.hero-visual {
  position: relative;
  min-height: 420px;
  display: flex; align-items: center; justify-content: center;
}
.hero-card {
  width: 100%; max-width: 420px; padding: 28px;
}
.market-pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 999px;
  background: rgba(255,255,255,0.06); border: 1px solid var(--border);
  font-size: 0.82rem; margin: 6px 6px 6px 0;
}
.market-pill .dot { width: 8px; height: 8px; border-radius: 50%; }
.dot.a { background: #ef4444; }
.dot.hk { background: #f59e0b; }
.dot.us { background: #3b82f6; }
.dot.crypto { background: #22d3ee; }

/* Section */
section { padding: 100px 0; }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 60px; }
.section-head h2 { font-size: 2.2rem; margin: 0 0 16px; }
.section-head p { color: var(--text-muted); font-size: 1.05rem; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.step {
  padding: 32px; text-align: center;
  transition: transform .3s, border-color .3s;
}
.step:hover { transform: translateY(-6px); border-color: rgba(14,165,233,0.4); }
.step-num {
  width: 48px; height: 48px; border-radius: 50%;
  display: grid; place-items: center; margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  font-weight: 800;
}
.step h3 { margin: 0 0 12px; font-size: 1.15rem; }
.step p { color: var(--text-muted); font-size: 0.92rem; }

/* AI Models */
.model-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.model-card { padding: 28px; transition: .3s; }
.model-card:hover { transform: translateY(-4px); }
.model-card .icon {
  width: 44px; height: 44px; border-radius: 12px;
  display: grid; place-items: center; margin-bottom: 18px;
  background: linear-gradient(135deg, rgba(14,165,233,0.2), rgba(99,102,241,0.2));
  font-size: 1.3rem;
}
.model-card h4 { margin: 0 0 8px; }
.model-card p { color: var(--text-muted); font-size: 0.88rem; margin-bottom: 16px; }
.model-card code {
  display: block; background: rgba(0,0,0,0.35); padding: 12px; border-radius: 8px;
  font-size: 0.78rem; color: var(--accent); overflow-x: auto;
}

/* Data levels */
.data-levels { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.level-card {
  padding: 28px; border-left: 3px solid var(--primary);
}
.level-card h4 { margin: 0 0 12px; }
.level-card ul { margin: 0; padding: 0; }
.level-card li {
  font-size: 0.86rem; color: var(--text-muted); padding: 6px 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.level-card li:last-child { border-bottom: none; }

/* Compare */
.compare-table { width: 100%; border-collapse: collapse; }
.compare-table th, .compare-table td { padding: 16px 20px; text-align: left; }
.compare-table thead th { color: var(--text-muted); font-weight: 500; border-bottom: 1px solid var(--border); }
.compare-table tbody tr { border-bottom: 1px solid rgba(255,255,255,0.05); }
.compare-table tbody tr:hover { background: rgba(255,255,255,0.02); }
.compare-table .win { color: var(--success); font-weight: 700; }
.compare-table .lose { color: var(--text-muted); }

/* Partners */
.partner-grid { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }
.partner { padding: 10px 18px; font-size: 0.85rem; color: var(--text-muted); }

/* Footer */
footer { padding: 60px 0 30px; border-top: 1px solid var(--border); }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; }
footer .brand p { color: var(--text-muted); font-size: 0.9rem; margin-top: 14px; }
footer h5 { margin: 0 0 18px; color: var(--text); }
footer a { display: block; color: var(--text-muted); font-size: 0.88rem; padding: 6px 0; }
footer a:hover { color: var(--text); }
.footer-bottom { text-align: center; color: var(--text-muted); font-size: 0.82rem; margin-top: 40px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.06); }

/* Strategy market */
.filters { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 28px; }
.filter-btn { padding: 8px 18px; border-radius: 999px; border: 1px solid var(--border); background: transparent; color: var(--text-muted); cursor: pointer; }
.filter-btn.active, .filter-btn:hover { background: rgba(14,165,233,0.15); color: var(--text); border-color: rgba(14,165,233,0.4); }
.strategy-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.strategy-card { padding: 24px; position: relative; }
.strategy-card .tag {
  position: absolute; top: 18px; right: 18px;
  padding: 4px 10px; border-radius: 999px; font-size: 0.72rem; font-weight: 600;
}
.tag.a { background: rgba(239,68,68,0.15); color: #fca5a5; }
.tag.hk { background: rgba(245,158,11,0.15); color: #fcd34d; }
.tag.us { background: rgba(59,130,246,0.15); color: #93c5fd; }
.tag.crypto { background: rgba(34,211,238,0.15); color: #a5f3fc; }
.strategy-card h4 { margin: 0 0 10px; font-size: 1.05rem; }
.strategy-card .metrics { display: flex; gap: 24px; margin: 18px 0; }
.strategy-card .metrics div strong { display: block; font-size: 1.15rem; }
.strategy-card .metrics div span { font-size: 0.75rem; color: var(--text-muted); }
.pos { color: var(--success); }
.neg { color: var(--danger); }

/* Builder */
.builder-layout { display: grid; grid-template-columns: 240px 1fr 320px; gap: 18px; min-height: 680px; }
.palette { padding: 18px; }
.palette h4 { margin: 0 0 14px; font-size: 0.9rem; color: var(--text-muted); }
.node-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: 10px; margin-bottom: 8px;
  background: rgba(255,255,255,0.04); cursor: grab; font-size: 0.85rem;
}
.node-item:hover { background: rgba(255,255,255,0.08); }
.canvas { padding: 18px; min-height: 680px; position: relative; overflow: auto; }
.canvas-area {
  width: 100%; height: 100%; min-height: 600px; border-radius: 12px;
  border: 2px dashed var(--border); background: rgba(0,0,0,0.18);
  display: grid; place-items: center; color: var(--text-muted);
}
.props { padding: 18px; }
.props h4 { margin: 0 0 14px; }

/* Dashboard */
.dashboard-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-bottom: 28px; }
.kpi { padding: 22px; text-align: center; }
.kpi strong { display: block; font-size: 1.6rem; }
.kpi span { font-size: 0.85rem; color: var(--text-muted); }
.ticker-wrap { overflow: hidden; white-space: nowrap; background: rgba(255,255,255,0.04); border-radius: 999px; padding: 10px 0; margin-bottom: 28px; }
.ticker { display: inline-block; animation: ticker 30s linear infinite; }
.ticker span { margin: 0 28px; font-size: 0.9rem; }
@keyframes ticker { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }
.table-card { padding: 22px; }
.table-card h4 { margin: 0 0 16px; }
.data-table { width: 100%; border-collapse: collapse; }
.data-table th, .data-table td { padding: 12px 14px; text-align: left; font-size: 0.9rem; border-bottom: 1px solid rgba(255,255,255,0.05); }
.data-table th { color: var(--text-muted); font-weight: 500; }

/* AI Chat */
.chat-container { max-width: 900px; margin: 0 auto; }
.chat-window { height: 520px; padding: 20px; overflow-y: auto; display: flex; flex-direction: column; gap: 14px; margin-bottom: 18px; }
.msg { max-width: 78%; padding: 14px 18px; border-radius: 18px; font-size: 0.95rem; }
.msg.user { align-self: flex-end; background: linear-gradient(135deg, var(--primary), var(--primary-2)); border-bottom-right-radius: 4px; }
.msg.ai { align-self: flex-start; background: rgba(255,255,255,0.08); border-bottom-left-radius: 4px; }
.chat-input { display: flex; gap: 12px; }
.chat-input input { flex: 1; padding: 14px 20px; border-radius: 999px; border: 1px solid var(--border); background: rgba(255,255,255,0.06); color: var(--text); font-size: 0.95rem; }
.chat-input input:focus { outline: none; border-color: var(--primary); }

/* News */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.news-card { padding: 22px; }
.news-card .date { font-size: 0.78rem; color: var(--text-muted); margin-bottom: 10px; }
.news-card h4 { margin: 0 0 10px; font-size: 1rem; }
.news-card p { color: var(--text-muted); font-size: 0.88rem; }

/* Docs */
.doc-grid { display: grid; grid-template-columns: 260px 1fr; gap: 32px; }
.doc-nav { padding: 22px; position: sticky; top: 92px; height: fit-content; }
.doc-nav a { display: block; padding: 10px 0; color: var(--text-muted); font-size: 0.9rem; border-bottom: 1px solid rgba(255,255,255,0.05); }
.doc-nav a:hover, .doc-nav a.active { color: var(--text); }
.doc-content { padding: 32px; }
.doc-content h3 { margin-top: 0; }
.doc-content pre { background: rgba(0,0,0,0.4); padding: 16px; border-radius: 10px; overflow-x: auto; font-size: 0.85rem; }
.doc-content code { color: var(--accent); }
.doc-content ol { padding-left: 22px; color: var(--text-muted); }
.doc-content li { margin-bottom: 10px; }

/* Responsive */
@media (max-width: 1024px) {
  .hero-grid, .builder-layout, .doc-grid { grid-template-columns: 1fr; }
  .steps, .model-grid, .data-levels, .strategy-grid, .news-grid, .dashboard-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .hero h1 { font-size: 2.1rem; }
  nav ul { display: none; }
  .steps, .model-grid, .data-levels, .strategy-grid, .news-grid, .dashboard-grid, .footer-grid { grid-template-columns: 1fr; }
}