/* ============ KawayiLLM · 深色科技 / 赛博霓虹 ============ */
:root {
  --bg: #05070f;
  --bg-2: #0a0f1e;
  --panel: rgba(255, 255, 255, .035);
  --line: rgba(148, 163, 184, .16);
  --text: #e7ecf5;
  --muted: #94a3b8;
  --cyan: #22d3ee;
  --blue: #4f7cff;
  --violet: #a78bfa;
  --pink: #f471b5;
  --green: #34d399;
  --amber: #fbbf24;
  --grad: linear-gradient(92deg, var(--cyan), var(--blue) 45%, var(--violet) 75%, var(--pink));
  --font: "Segoe UI", "Microsoft YaHei", "PingFang SC", -apple-system, sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.7;
  overflow-x: hidden;
}
/* 背景光斑 */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: -2;
  background:
    radial-gradient(52rem 30rem at 12% -6%, rgba(34, 211, 238, .13), transparent 60%),
    radial-gradient(46rem 30rem at 88% 4%, rgba(167, 139, 250, .14), transparent 60%),
    radial-gradient(60rem 40rem at 50% 115%, rgba(79, 124, 255, .10), transparent 65%),
    var(--bg);
}
#net { position: fixed; inset: 0; z-index: -1; width: 100%; height: 100%; opacity: .55; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
a { color: inherit; text-decoration: none; }

/* ============ 导航 ============ */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(5, 7, 15, .62);
  border-bottom: 1px solid var(--line);
  transition: background .3s;
}
.nav-in { display: flex; align-items: center; gap: 26px; height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; letter-spacing: .5px; }
.brand em { font-style: normal; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.links { display: flex; gap: 4px; margin-left: auto; }
.links a {
  padding: 7px 14px; border-radius: 999px; font-size: 14px; color: var(--muted);
  transition: .2s;
}
.links a:hover, .links a.active { color: var(--text); background: rgba(255, 255, 255, .07); }

/* ============ 按钮 ============ */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 26px; border-radius: 12px; font-size: 15px; font-weight: 600;
  transition: transform .18s, box-shadow .18s, background .18s;
  cursor: pointer; white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-neon {
  background: var(--grad); color: #05070f;
  box-shadow: 0 0 22px rgba(34, 211, 238, .35), 0 0 46px rgba(167, 139, 250, .18);
}
.btn-neon:hover { box-shadow: 0 0 30px rgba(34, 211, 238, .55), 0 0 60px rgba(167, 139, 250, .3); }
.btn-ghost {
  border: 1px solid var(--line); color: var(--text); background: rgba(255, 255, 255, .04);
}
.btn-ghost:hover { border-color: var(--cyan); box-shadow: 0 0 18px rgba(34, 211, 238, .25); }
.repo { padding: 8px 16px; font-size: 13px; font-weight: 500; }

/* ============ Hero ============ */
.hero { padding: 168px 0 84px; position: relative; }
.eyebrow {
  font-size: 12px; letter-spacing: 3.5px; color: var(--cyan);
  font-weight: 700; margin-bottom: 18px;
}
.hero h1 {
  font-size: clamp(38px, 6.4vw, 68px);
  line-height: 1.16; font-weight: 900; letter-spacing: 1px;
}
.grad {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lede { margin-top: 22px; color: var(--muted); font-size: 17px; max-width: 46rem; }
.lede b { color: var(--text); font-weight: 600; }
.cta-row { display: flex; gap: 14px; margin-top: 34px; flex-wrap: wrap; }
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 34px; list-style: none; }
.chips li {
  font-size: 12.5px; color: var(--muted); padding: 5px 13px;
  border: 1px solid var(--line); border-radius: 999px; background: rgba(255, 255, 255, .03);
}
.glow-line {
  position: absolute; left: 8%; right: 8%; bottom: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(34, 211, 238, .6), rgba(167, 139, 250, .6), transparent);
}

/* ============ 数据条 ============ */
.stats { padding: 34px 0; border-bottom: 1px solid var(--line); background: rgba(10, 15, 30, .45); }
.stats-in { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.stat { text-align: center; }
.stat b {
  display: block; font-size: clamp(28px, 4vw, 44px); font-weight: 900;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
  font-variant-numeric: tabular-nums;
}
.stat span { font-size: 13px; color: var(--muted); }

/* ============ 通用 section ============ */
.sec { padding: 92px 0; }
.sec-label {
  font-size: 12.5px; letter-spacing: 3px; font-weight: 700; margin-bottom: 14px;
  color: var(--violet);
}
.sec h2 { font-size: clamp(26px, 4vw, 42px); font-weight: 800; line-height: 1.3; }
.sec h2.big { line-height: 1.45; }
.prose { margin-top: 18px; color: var(--muted); font-size: 16.5px; max-width: 52rem; }
.prose b { color: var(--text); }

/* ============ 路线卡片 ============ */
.cards3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 44px; }
.pcard {
  background: var(--panel); border: 1px solid var(--line); border-radius: 18px;
  padding: 26px 24px; display: flex; flex-direction: column; gap: 14px;
  position: relative; overflow: hidden;
  transition: transform .25s, border-color .25s, box-shadow .25s;
}
.pcard::before {
  content: ""; position: absolute; inset: 0 0 auto; height: 2px;
  background: var(--grad); opacity: 0; transition: opacity .25s;
}
.pcard:hover { transform: translateY(-6px); border-color: rgba(34, 211, 238, .45); box-shadow: 0 18px 50px rgba(2, 6, 23, .8), 0 0 30px rgba(34, 211, 238, .12); }
.pcard:hover::before { opacity: 1; }
.pcard-top { display: flex; align-items: center; justify-content: space-between; }
.pnum { font-size: 30px; font-weight: 900; color: rgba(148, 163, 184, .22); line-height: 1; }
.badge {
  font-size: 11.5px; font-weight: 700; padding: 4px 11px; border-radius: 999px; letter-spacing: .5px;
}
.badge.ok   { color: var(--green); background: rgba(52, 211, 153, .1); border: 1px solid rgba(52, 211, 153, .35); }
.badge.cyan { color: var(--cyan);  background: rgba(34, 211, 238, .1); border: 1px solid rgba(34, 211, 238, .35); }
.badge.warn { color: var(--amber); background: rgba(251, 191, 36, .1); border: 1px solid rgba(251, 191, 36, .35); }
.pcard h3 { font-size: 20px; font-weight: 800; }
.pcard h3 small { display: block; font-size: 12.5px; color: var(--muted); font-weight: 400; margin-top: 4px; }
.pcard p { font-size: 14px; color: var(--muted); flex: 1; }
.pcard p b { color: var(--text); }
.plinks { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; padding-top: 6px; }
.plink { font-size: 14px; font-weight: 700; color: var(--cyan); transition: .2s; }
.plink:hover { text-shadow: 0 0 14px rgba(34, 211, 238, .8); }
.plink.dim { color: var(--muted); font-weight: 400; }
.ptag { margin-left: auto; font-size: 11.5px; color: var(--muted); font-family: Consolas, monospace; }

/* ============ 场景 / 社区卡片 ============ */
.cards4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 44px; }
.scard, .vcard {
  background: var(--panel); border: 1px solid var(--line); border-radius: 16px;
  padding: 24px 20px; transition: transform .25s, border-color .25s;
}
.scard:hover, .vcard:hover { transform: translateY(-4px); border-color: rgba(167, 139, 250, .5); }
.scard i { font-size: 26px; font-style: normal; display: block; margin-bottom: 12px; filter: drop-shadow(0 0 12px rgba(167, 139, 250, .5)); }
.scard h4, .vcard h4 { font-size: 16.5px; font-weight: 800; margin-bottom: 8px; }
.scard p, .vcard p { font-size: 13.5px; color: var(--muted); }
.vcard { border-left: 3px solid transparent; border-image: var(--grad) 1; border-left-style: solid; }

/* ============ 加入 ============ */
.join {
  margin-top: 44px; padding: 30px 32px; border-radius: 18px;
  background: linear-gradient(120deg, rgba(34, 211, 238, .07), rgba(167, 139, 250, .07));
  border: 1px solid rgba(148, 163, 184, .22);
  display: flex; align-items: center; justify-content: space-between; gap: 22px; flex-wrap: wrap;
}
.join p { color: var(--muted); font-size: 15px; }
.join code { background: rgba(255, 255, 255, .08); padding: 2px 8px; border-radius: 6px; font-size: 13px; color: var(--cyan); }

/* ============ 页脚 ============ */
.foot { border-top: 1px solid var(--line); padding: 26px 0 40px; }
.foot-in { display: flex; justify-content: space-between; align-items: center; gap: 14px; flex-wrap: wrap; color: var(--muted); font-size: 13px; }
.foot-links { display: flex; gap: 18px; }
.foot-links a:hover { color: var(--cyan); }

/* ============ 出场动画 ============ */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.on { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ============ 响应式 ============ */
@media (max-width: 900px) {
  .cards3 { grid-template-columns: 1fr; }
  .cards4 { grid-template-columns: repeat(2, 1fr); }
  .stats-in { grid-template-columns: repeat(2, 1fr); row-gap: 26px; }
  .links { display: none; }
  .hero { padding-top: 130px; }
}
@media (max-width: 520px) {
  .cards4 { grid-template-columns: 1fr; }
}