:root {
  --bg: #eef2ff;
  --bg2: #f7f9ff;
  --panel: rgba(255, 255, 255, 0.72);
  --panel-solid: #ffffff;
  --line: rgba(79, 70, 229, 0.16);
  --txt: #101a36;
  --muted: #5b6b8c;
  --accent: #4f46e5;   /* indigo */
  --accent2: #06b6d4;  /* cyan   */
  --accent3: #ec4899;  /* pink   */
  --grad: linear-gradient(120deg, #4f46e5, #06b6d4 55%, #22d3ee);
  --grad-warm: linear-gradient(120deg, #ec4899, #8b5cf6);
  --radius: 18px;
  --shadow: 0 18px 50px rgba(56, 64, 140, 0.14);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  color: var(--txt);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  background:
    radial-gradient(900px 520px at 12% -8%, #dbe4ff 0%, transparent 60%),
    radial-gradient(820px 600px at 100% 0%, #d7f6ff 0%, transparent 58%),
    radial-gradient(700px 600px at 60% 110%, #ffe1f3 0%, transparent 60%),
    linear-gradient(180deg, var(--bg2), var(--bg));
  background-attachment: fixed;
}

/* ---------- 背景 AI 装饰层 ---------- */
.bg-grid {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image: linear-gradient(rgba(79,70,229,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79,70,229,0.06) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(900px 700px at 50% -5%, #000 0%, transparent 78%);
}
.orb {
  position: fixed; border-radius: 50%; filter: blur(46px); opacity: 0.55;
  z-index: 0; pointer-events: none; animation: float 14s ease-in-out infinite;
}
.orb.a { width: 340px; height: 340px; top: -60px; left: -40px;
  background: radial-gradient(circle, #7c83ff, transparent 70%); }
.orb.b { width: 300px; height: 300px; top: 30%; right: -60px;
  background: radial-gradient(circle, #34e0ef, transparent 70%); animation-delay: -4s; }
.orb.c { width: 260px; height: 260px; bottom: -50px; left: 35%;
  background: radial-gradient(circle, #ff8fd0, transparent 70%); animation-delay: -8s; }
@keyframes float {
  0%,100% { transform: translateY(0) translateX(0); }
  50% { transform: translateY(-26px) translateX(14px); }
}
.particles { position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.particles i {
  position: absolute; width: 8px; height: 8px; border-radius: 50%;
  background: var(--grad); opacity: 0.5; animation: rise linear infinite;
}
@keyframes rise {
  0% { transform: translateY(20px) scale(0.6); opacity: 0; }
  20% { opacity: 0.7; }
  100% { transform: translateY(-110vh) scale(1); opacity: 0; }
}

/* ---------- Header ---------- */
.site-header {
  position: relative; z-index: 3;
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 6vw;
  backdrop-filter: blur(10px);
}
.brand { display: flex; align-items: center; gap: 12px; }
.logo {
  width: 40px; height: 40px; display: grid; place-items: center;
  border-radius: 12px; font-weight: 800; letter-spacing: 1px; color: #fff;
  background: var(--grad); box-shadow: 0 8px 22px rgba(79,70,229,0.4);
  animation: pulse 3s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { box-shadow: 0 8px 22px rgba(79,70,229,0.4); }
  50% { box-shadow: 0 8px 34px rgba(6,182,212,0.55); } }
.brand-name { font-weight: 800; font-size: 18px; letter-spacing: 0.5px; }
.site-nav a {
  color: var(--muted); text-decoration: none; margin-left: 26px;
  font-size: 14px; transition: color 0.2s;
}
.site-nav a:hover { color: var(--accent); }

/* ---------- Main ---------- */
main {
  position: relative; z-index: 2;
  max-width: 1120px; margin: 0 auto; padding: 6vh 6vw 4vh;
}

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--accent); font-weight: 700; letter-spacing: 1.5px;
  font-size: 12.5px; padding: 7px 14px; border-radius: 999px;
  background: rgba(79,70,229,0.1); border: 1px solid var(--line);
}
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent2);
  box-shadow: 0 0 0 0 rgba(6,182,212,0.6); animation: ping 1.8s infinite; }
@keyframes ping { 0% { box-shadow: 0 0 0 0 rgba(6,182,212,0.6); }
  70% { box-shadow: 0 0 0 9px rgba(6,182,212,0); } 100% { box-shadow: 0 0 0 0 rgba(6,182,212,0); } }

.hero { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 40px; align-items: center; }
.hero h1 {
  font-size: clamp(34px, 5vw, 56px); line-height: 1.12; font-weight: 900;
  margin: 18px 0 18px; letter-spacing: -0.5px;
}
.hero h1 .grad {
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.lead { color: var(--muted); font-size: 16px; line-height: 1.95; max-width: 560px; }
.lead b { color: var(--txt); }

.caps { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.caps li {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--panel-solid); border: 1px solid var(--line);
  padding: 10px 15px; border-radius: 999px; font-size: 13.5px; color: #2a3656;
  box-shadow: 0 6px 18px rgba(56,64,140,0.07); transition: transform 0.2s;
}
.caps li:hover { transform: translateY(-3px); }
.caps .ic { font-size: 16px; }
.caps b { color: var(--accent); }

/* AI 视觉插画 */
.ai-art { position: relative; display: grid; place-items: center; min-height: 300px; }
.ai-art svg { width: 100%; max-width: 360px; height: auto; overflow: visible; }
.node { transform-box: fill-box; transform-origin: center; animation: nodep 2.6s ease-in-out infinite; }
@keyframes nodep { 0%,100% { opacity: 0.55; } 50% { opacity: 1; } }
.pulse-ring { transform-box: fill-box; transform-origin: center; animation: ring 3s ease-out infinite; }
@keyframes ring { 0% { r: 14; opacity: 0.8; } 100% { r: 46; opacity: 0; } }
.spark { animation: tw 2.4s ease-in-out infinite; }
@keyframes tw { 0%,100% { opacity: 0.2; transform: scale(0.8); } 50% { opacity: 1; transform: scale(1.15); } }

/* ---------- Entry cards ---------- */
.entry { margin-top: 8vh; }
.entry h2 {
  font-size: 22px; margin-bottom: 22px; font-weight: 800;
  padding-left: 13px; border-left: 4px solid; border-image: var(--grad) 1;
}
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; }
.card {
  position: relative; display: block; text-decoration: none; color: var(--txt);
  background: var(--panel); backdrop-filter: blur(8px);
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 24px 30px; overflow: hidden;
  box-shadow: var(--shadow); transition: transform 0.22s, box-shadow 0.22s, border-color 0.22s;
  opacity: 0; transform: translateY(18px); animation: up 0.6s forwards;
}
.cards .card:nth-child(1) { animation-delay: 0.05s; }
.cards .card:nth-child(2) { animation-delay: 0.15s; }
.cards .card:nth-child(3) { animation-delay: 0.25s; }
@keyframes up { to { opacity: 1; transform: translateY(0); } }
.card::before {
  content: ""; position: absolute; inset: 0; opacity: 0; transition: opacity 0.25s;
  background: radial-gradient(420px 220px at 100% 0%, rgba(79,70,229,0.16), transparent 60%);
}
.card:hover { transform: translateY(-8px); border-color: var(--accent);
  box-shadow: 0 26px 56px rgba(56,64,140,0.22); }
.card:hover::before { opacity: 1; }
.card-ico {
  width: 58px; height: 58px; display: grid; place-items: center;
  border-radius: 16px; font-size: 28px; margin-bottom: 14px;
  background: linear-gradient(135deg, rgba(79,70,229,0.14), rgba(6,182,212,0.14));
  border: 1px solid var(--line);
}
.card h3 { font-size: 19px; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 14px; line-height: 1.7; }
.card.primary { border-color: rgba(79,70,229,0.5);
  background: linear-gradient(160deg, rgba(79,70,229,0.12), rgba(6,182,212,0.08)); }
.card-tag {
  position: absolute; top: 16px; right: 16px; font-size: 11px;
  padding: 4px 11px; border-radius: 999px; font-weight: 700;
}
.card-tag.live { background: rgba(6,182,212,0.14); color: #0e8fa3; border: 1px solid rgba(6,182,212,0.4); }
.card-tag.soon { background: rgba(91,107,140,0.12); color: var(--muted); border: 1px solid var(--line); }

/* ---------- Footer ---------- */
.site-footer {
  position: relative; z-index: 2; display: flex; justify-content: space-between;
  align-items: center; flex-wrap: wrap; gap: 8px 16px;
  max-width: 1120px; margin: 6vh auto 0; padding: 26px 6vw;
  border-top: 1px solid var(--line); color: var(--muted); font-size: 13px;
}
.site-footer .domain { color: var(--accent); font-weight: 700; }
.site-footer .beian { color: var(--muted); text-decoration: none; transition: color .2s; }
.site-footer .beian:hover { color: var(--accent); }

@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; }
  .ai-art { order: -1; min-height: 220px; }
  .site-nav { display: none; }
}