/* ==========================================================
   SKYWATCH 星空观测站 (996859.xyz)
   night.css
   ========================================================== */

:root {
  --night: #050812;
  --night-2: #0a1020;
  --panel: rgba(15, 22, 40, 0.66);
  --line: rgba(120, 160, 255, 0.16);
  --star: #dfe9ff;
  --dim: #7f8db0;
  --gold: #ffd479;
  --blue: #6fb7ff;
  --violet: #b48cff;
  --teal: #64f0d0;
  --font: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --mono: "SFMono-Regular", "JetBrains Mono", Consolas, monospace;
  --maxw: 1140px;
}

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

body {
  margin: 0;
  background: var(--night);
  color: var(--star);
  font-family: var(--font);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(1200px 800px at 70% -10%, rgba(111, 183, 255, .10), transparent 62%),
    radial-gradient(900px 700px at 10% 20%, rgba(180, 140, 255, .08), transparent 60%),
    linear-gradient(180deg, #050812, #070d1c 40%, #050812);
}

#sky-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.page { position: relative; z-index: 1; }
.wrap { width: min(var(--maxw), calc(100% - 48px)); margin: 0 auto; }

/* ---------------- 导航 ---------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(5, 8, 18, .74);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; gap: 24px; height: 66px; }

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--star);
  font-weight: 800;
  letter-spacing: .18em;
  font-size: 14px;
}
.brand i {
  width: 26px; height: 26px;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 30%, #fff, var(--gold) 46%, rgba(255, 212, 121, .1) 70%);
  box-shadow: 0 0 18px rgba(255, 212, 121, .45);
}

.nav-links { margin-left: auto; display: flex; gap: 2px; flex-wrap: wrap; }
.nav-links a {
  color: var(--dim);
  text-decoration: none;
  font-size: 14px;
  padding: 7px 13px;
  border-radius: 999px;
  transition: color .25s, background .25s;
}
.nav-links a:hover { color: var(--star); background: rgba(120, 160, 255, .08); }
.nav-links a[aria-current="page"] { color: var(--gold); }

/* ---------------- 排版 ---------------- */
section { padding: 80px 0; }

.kicker {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .36em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 14px;
}

h1, h2, h3 { margin: 0 0 16px; line-height: 1.25; letter-spacing: -.01em; }
h1 { font-size: clamp(38px, 6vw, 74px); font-weight: 900; }
h2 { font-size: clamp(25px, 3.4vw, 38px); font-weight: 800; }
h3 { font-size: 18px; font-weight: 700; }

p { color: var(--dim); margin: 0 0 15px; }
.lede { font-size: clamp(15px, 1.5vw, 18px); color: var(--dim); max-width: 62ch; }

.grad {
  background: linear-gradient(100deg, var(--gold), var(--teal) 46%, var(--blue));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------------- Hero ---------------- */
.hero { min-height: calc(100vh - 66px); display: grid; align-items: center; padding: 48px 0 76px; }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 52px; align-items: center; }

.hero-sub { font-size: clamp(15px, 1.6vw, 18px); color: var(--dim); max-width: 52ch; margin-bottom: 28px; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 26px;
  border-radius: 999px;
  font-size: 15px; font-weight: 600;
  text-decoration: none;
  color: #061020;
  background: linear-gradient(120deg, var(--gold), #ffe6ac);
  box-shadow: 0 10px 30px rgba(255, 212, 121, .22);
  transition: transform .3s, box-shadow .3s;
  border: none;
  cursor: pointer;
  font-family: var(--font);
}
.btn:hover { transform: translateY(-3px); box-shadow: 0 16px 40px rgba(255, 212, 121, .3); }
.btn.ghost {
  background: transparent; color: var(--star);
  border: 1px solid var(--line); box-shadow: none;
}
.btn.ghost:hover { border-color: rgba(111, 183, 255, .5); color: var(--blue); }

/* ---------------- 月相卡 ---------------- */
.moon-panel {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 20px;
  padding: 28px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  text-align: center;
}
.moon-head {
  display: flex; justify-content: space-between;
  font-family: var(--mono); font-size: 11px; letter-spacing: .22em;
  color: var(--dim); margin-bottom: 18px;
}
.moon-disc {
  width: 168px; height: 168px;
  border-radius: 50%;
  margin: 0 auto 18px;
  position: relative;
  background: #cfd8ee;
  box-shadow: 0 0 46px rgba(207, 216, 238, .22), inset -14px -10px 30px rgba(0,0,0,.35);
  overflow: hidden;
}
.moon-disc .shadow {
  position: absolute;
  inset: 0;
  background: #050812;
  border-radius: 50%;
}
.moon-name { font-size: 22px; font-weight: 800; margin-bottom: 4px; }
.moon-meta { font-family: var(--mono); font-size: 12px; color: var(--dim); letter-spacing: .08em; }
.moon-extra {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1px; background: var(--line);
  border: 1px solid var(--line);
  border-radius: 12px; overflow: hidden;
  margin-top: 20px;
}
.moon-extra div { background: rgba(8, 13, 26, .9); padding: 12px 8px; }
.moon-extra b { display: block; font-family: var(--mono); font-size: 15px; }
.moon-extra span { font-size: 11px; color: var(--dim); }

/* ---------------- 数字条 ---------------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 16px; overflow: hidden; }
.stat { background: rgba(8, 13, 26, .82); padding: 24px 18px; text-align: center; }
.stat b { display: block; font-size: clamp(22px, 3vw, 32px); font-weight: 900; color: var(--gold); font-variant-numeric: tabular-nums; }
.stat span { font-size: 12px; color: var(--dim); letter-spacing: .14em; }

/* ---------------- 卡片 ---------------- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; }
.card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  transition: transform .35s var(--ease, cubic-bezier(.2,.9,.3,1)), border-color .3s;
}
.card:hover { transform: translateY(-4px); border-color: rgba(111, 183, 255, .4); }
.card .num { font-family: var(--mono); font-size: 11px; letter-spacing: .24em; color: var(--blue); margin-bottom: 12px; }
.card p { margin: 0; font-size: 14px; }

/* ---------------- 计算器 ---------------- */
.calc {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  padding: 28px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; margin-bottom: 18px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-family: var(--mono); font-size: 11px; letter-spacing: .16em; color: var(--dim); }
.field input, .field select {
  background: rgba(6, 10, 20, .8);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 11px 14px;
  color: var(--star);
  font-size: 15px;
  font-family: var(--mono);
  outline: none;
  transition: border-color .25s;
}
.field input:focus, .field select:focus { border-color: rgba(111, 183, 255, .6); }

.result-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; margin-top: 22px; }
.result {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
  background: rgba(8, 13, 26, .7);
}
.result .label { font-family: var(--mono); font-size: 11px; letter-spacing: .18em; color: var(--dim); }
.result .value { font-size: 22px; font-weight: 800; margin-top: 4px; font-variant-numeric: tabular-nums; }
.result .note { font-size: 12px; color: var(--dim); margin-top: 2px; }

/* ---------------- 星座 ---------------- */
.season-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.season {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px;
  background: linear-gradient(160deg, rgba(20, 30, 56, .6), rgba(8, 12, 24, .5));
}
.season .tag { font-family: var(--mono); font-size: 11px; color: var(--teal); letter-spacing: .18em; }
.season h3 { margin: 8px 0 10px; font-size: 18px; }
.season ul { margin: 0; padding-left: 18px; color: var(--dim); font-size: 14px; line-height: 1.9; }

/* ---------------- 指南目录 ---------------- */
.guide-list { display: grid; gap: 14px; }
.guide-item {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  padding: 4px 22px;
}
.guide-item summary {
  cursor: pointer;
  padding: 16px 0;
  font-weight: 700;
  font-size: 16px;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.guide-item summary::-webkit-details-marker { display: none; }
.guide-item summary::after { content: "+"; color: var(--blue); font-family: var(--mono); font-size: 20px; }
.guide-item[open] summary::after { content: "−"; }
.guide-item .body { padding: 0 0 18px; border-top: 1px solid var(--line); padding-top: 14px; }
.guide-item p:last-child { margin-bottom: 0; }

/* ---------------- 页脚 ---------------- */
.footer { border-top: 1px solid var(--line); padding: 40px 0 58px; margin-top: 20px; }
.footer-inner { display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between; font-size: 12px; color: var(--dim); font-family: var(--mono); }
.footer a { color: var(--dim); text-decoration: none; }
.footer a:hover { color: var(--blue); }

/* ---------------- 动画 ---------------- */
.rise {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .8s cubic-bezier(.2,.9,.3,1), transform .8s cubic-bezier(.2,.9,.3,1);
  transition-delay: var(--d, 0ms);
}
.rise.in { opacity: 1; transform: none; }

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 34px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .wrap { width: calc(100% - 32px); }
  section { padding: 56px 0; }
  .moon-disc { width: 132px; height: 132px; }
}