/* ============================================================
   安神 ANDSUN · 品牌门户样式
   沿用「安神AIGC 博客」科技感 token，保证跨站视觉一致
   ============================================================ */
:root {
  --bg: #060912;
  --bg-soft: #0b1120;
  --surface: rgba(255, 255, 255, 0.035);
  --surface-2: rgba(255, 255, 255, 0.06);
  --border: rgba(120, 160, 255, 0.16);
  --border-strong: rgba(120, 200, 255, 0.4);
  --text: #e6edf6;
  --muted: #93a3bd;
  --faint: #5c6b85;
  --cyan: #22d3ee;
  --blue: #3b82f6;
  --violet: #a855f7;
  --emerald: #34d399;
  --amber: #fbbf24;
  --radius: 16px;
  --maxw: 1140px;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ---- 背景：网格 + 光晕 ---- */
.bg-fx {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 600px at 12% -5%, rgba(59, 130, 246, 0.18), transparent 60%),
    radial-gradient(800px 600px at 95% 5%, rgba(168, 85, 247, 0.16), transparent 60%),
    radial-gradient(700px 500px at 50% 110%, rgba(34, 211, 238, 0.12), transparent 60%),
    var(--bg);
}
.bg-fx::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(120, 160, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 160, 255, 0.05) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 78%);
}

a { color: var(--cyan); text-decoration: none; transition: color .2s; }
a:hover { color: #fff; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }

/* ---- 导航 ---- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(6, 9, 18, 0.72);
  border-bottom: 1px solid var(--border);
}
.nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 62px;
  gap: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); }
.brand:hover { color: var(--text); }
.brand img {
  height: 34px;
  width: 34px;
  border-radius: 9px;
  display: block;
  background: #000; /* 吉祥物 logo 为黑底方形，深色主题下无缝融合 */
}
.brand-name { font-size: 16.5px; font-weight: 500; letter-spacing: .01em; white-space: nowrap; }
.brand-name b {
  font-weight: 700;
  background: linear-gradient(92deg, var(--cyan), var(--blue));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links a {
  color: var(--muted);
  font-size: 14.5px;
  position: relative;
  padding: 4px 0;
}
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -3px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--blue));
}
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 10px;
  padding: 6px 10px;
  font-size: 16px;
  cursor: pointer;
}

/* ---- Hero ---- */
.hero { padding: 68px 0 46px; text-align: center; }
.eyebrow {
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cyan);
  opacity: .9;
  margin-bottom: 14px;
}
.hero h1 {
  margin: 0;
  font-size: clamp(38px, 7vw, 68px);
  line-height: 1.15;
  letter-spacing: -.02em;
}
.grad-text {
  background: linear-gradient(92deg, var(--cyan), var(--blue) 45%, var(--violet));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero .lead {
  max-width: 640px;
  margin: 18px auto 0;
  color: var(--muted);
  font-size: clamp(15px, 2.2vw, 17.5px);
}
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-top: 28px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .16s, box-shadow .16s, background .16s;
}
.btn:hover { transform: translateY(-2px); color: #fff; }
.btn-primary {
  background: linear-gradient(92deg, var(--emerald), #0f9d76);
  color: #04140f;
  box-shadow: 0 10px 30px rgba(52, 211, 153, .22);
}
.btn-ghost {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost:hover { background: var(--surface-2); }

/* ---- 板块卡片 ---- */
.section { padding: 40px 0 10px; }
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.section-head h2 {
  margin: 0;
  font-size: clamp(20px, 3vw, 26px);
  letter-spacing: -.01em;
}
.section-head .more { font-size: 14px; color: var(--cyan); }

.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.pillar {
  position: relative;
  display: block;
  padding: 26px 24px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  overflow: hidden;
  transition: transform .18s, border-color .18s, background .18s;
}
.pillar::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--accent, var(--blue));
}
.pillar:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  background: var(--surface-2);
  color: var(--text);
}
.pillar .p-icon {
  width: 42px; height: 42px;
  border-radius: 12px;
  display: grid; place-items: center;
  font-size: 21px;
  background: color-mix(in srgb, var(--accent, var(--blue)) 18%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent, var(--blue)) 40%, transparent);
  margin-bottom: 14px;
}
.pillar h3 { margin: 0 0 6px; font-size: 19px; }
.pillar p { margin: 0 0 16px; color: var(--muted); font-size: 14.5px; min-height: 46px; }
.pillar .p-meta { font-size: 13px; color: var(--accent, var(--blue)); font-weight: 600; }
.pillar .p-tag {
  position: absolute;
  top: 18px; right: 18px;
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 999px;
  background: rgba(251, 191, 36, .14);
  border: 1px solid rgba(251, 191, 36, .35);
  color: var(--amber);
}

/* ---- 卡片网格（小学堂 / 作品集）---- */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
  color: var(--text);
  transition: transform .18s, border-color .18s, background .18s;
}
.card:hover { transform: translateY(-4px); border-color: var(--border-strong); background: var(--surface-2); color: var(--text); }
.cover {
  position: relative;
  aspect-ratio: 16 / 9;
  display: grid;
  place-items: center;
  font-size: 26px;
  font-weight: 700;
  letter-spacing: .04em;
  color: rgba(255, 255, 255, .92);
  text-shadow: 0 2px 14px rgba(0, 0, 0, .35);
}
.cover .c-kind {
  position: absolute;
  left: 10px; bottom: 10px;
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 999px;
  background: rgba(0, 0, 0, .42);
  backdrop-filter: blur(6px);
  letter-spacing: 0;
  font-weight: 500;
  text-shadow: none;
}
.card-body { padding: 14px 16px 16px; flex: 1; display: flex; flex-direction: column; }
.card-body h4 { margin: 0 0 6px; font-size: 15.5px; line-height: 1.45; }
.card-body p { margin: 0 0 10px; font-size: 13.5px; color: var(--muted); flex: 1; }
.card-meta { font-size: 12px; color: var(--faint); display: flex; gap: 10px; flex-wrap: wrap; }

/* 封面渐变（无图方案，零带宽） */
.g-emerald { background: linear-gradient(135deg, #0f6e56, #34d399); }
.g-blue    { background: linear-gradient(135deg, #16478c, #38bdf8); }
.g-violet  { background: linear-gradient(135deg, #5b21b6, #c084fc); }
.g-amber   { background: linear-gradient(135deg, #92400e, #fbbf24); }
.g-cyan    { background: linear-gradient(135deg, #0e7490, #22d3ee); }
.g-rose    { background: linear-gradient(135deg, #9f1239, #fb7185); }

/* ---- 博客列表 ---- */
.post-list { display: grid; gap: 12px; }
.post-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text);
  transition: border-color .18s, background .18s, transform .18s;
}
.post-row:hover { border-color: var(--border-strong); background: var(--surface-2); color: var(--text); transform: translateX(3px); }
.post-row .pr-date { font-size: 12.5px; color: var(--faint); min-width: 84px; }
.post-row .pr-title { flex: 1; font-size: 15px; }
.post-row .pr-cat {
  font-size: 11.5px;
  padding: 2px 9px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
}

/* ---- 关于 + 私域 ---- */
.about {
  margin: 46px 0 10px;
  padding: 34px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background:
    radial-gradient(600px 300px at 15% 0%, rgba(59, 130, 246, .16), transparent 65%),
    radial-gradient(500px 300px at 90% 100%, rgba(168, 85, 247, .14), transparent 65%),
    var(--surface);
}
.about h2 { margin: 0 0 10px; font-size: clamp(20px, 3vw, 26px); }
.about p { margin: 0 0 18px; color: var(--muted); max-width: 720px; }
.channels { display: flex; gap: 12px; flex-wrap: wrap; }
.chan {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, .03);
  color: var(--text);
  font-size: 14px;
}
.chan:hover { border-color: var(--border-strong); color: #fff; }

/* ---- 页脚 ---- */
.footer {
  margin-top: 56px;
  border-top: 1px solid var(--border);
  background: rgba(6, 9, 18, .6);
  padding: 30px 0 34px;
}
.footer .wrap { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.footer .f-brand { font-size: 15px; font-weight: 600; }
.footer .f-note { font-size: 13px; color: var(--faint); margin-top: 6px; }
.footer .f-links { display: flex; gap: 18px; flex-wrap: wrap; font-size: 13.5px; }
.footer .f-icp { font-size: 12.5px; color: var(--faint); margin-top: 14px; width: 100%; }
.footer .f-icp a { color: var(--faint); }
.footer .f-icp a:hover { color: var(--cyan); }

.empty { color: var(--faint); font-size: 14px; padding: 18px 0; }

/* ---- 响应式 ---- */
@media (max-width: 900px) {
  .pillars { grid-template-columns: 1fr; }
  .grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 62px; left: 0; right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 10px 22px 16px;
    background: rgba(6, 9, 18, .97);
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 0; width: 100%; }
  .nav-toggle { display: block; }
  .grid { grid-template-columns: 1fr; }
  .hero { padding: 44px 0 30px; }
  .about { padding: 24px 20px; }
  .post-row { flex-wrap: wrap; }
  .post-row .pr-date { min-width: auto; }
}