:root,
[data-theme="light"] {
  color-scheme: light;
  --bg-0: #f3f6fb;
  --bg-1: #e7eef7;
  --panel: rgba(255, 255, 255, 0.88);
  --line: rgba(36, 68, 110, 0.16);
  --text: #122033;
  --muted: #4d6078;
  --accent: #0d8a76;
  --accent-2: #c46a16;
  --shadow: 0 20px 48px rgba(30, 50, 80, 0.1);
  --glow-a: #c7d8ef;
  --glow-b: #d5e3f3;
  --surface-deep: rgba(255, 255, 255, 0.76);
  --ghost-bg: rgba(255, 255, 255, 0.7);
  --code-bg: #eef3f8;
  --code-text: #16324a;
  --btn-ink: #02201a;
  --dash: rgba(36, 68, 110, 0.18);
  --hero-orb: rgba(196, 106, 22, 0.28);
  --dot-glow: rgba(13, 138, 118, 0.35);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg-0: #06101f;
    --bg-1: #0f1d35;
    --panel: rgba(10, 22, 43, 0.72);
    --line: rgba(104, 149, 214, 0.32);
    --text: #e6efff;
    --muted: #b4c5e2;
    --accent: #44d1b6;
    --accent-2: #ffb65d;
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.34);
    --glow-a: #1f3e70;
    --glow-b: #32456b;
    --surface-deep: rgba(8, 19, 35, 0.66);
    --ghost-bg: rgba(12, 26, 49, 0.42);
    --code-bg: rgba(7, 17, 33, 0.9);
    --code-text: #dff7ff;
    --btn-ink: #02201a;
    --dash: rgba(120, 159, 212, 0.25);
    --hero-orb: rgba(255, 182, 93, 0.3);
    --dot-glow: rgba(68, 209, 182, 0.9);
  }
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg-0: #06101f;
  --bg-1: #0f1d35;
  --panel: rgba(10, 22, 43, 0.72);
  --line: rgba(104, 149, 214, 0.32);
  --text: #e6efff;
  --muted: #b4c5e2;
  --accent: #44d1b6;
  --accent-2: #ffb65d;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.34);
  --glow-a: #1f3e70;
  --glow-b: #32456b;
  --surface-deep: rgba(8, 19, 35, 0.66);
  --ghost-bg: rgba(12, 26, 49, 0.42);
  --code-bg: rgba(7, 17, 33, 0.9);
  --code-text: #dff7ff;
  --btn-ink: #02201a;
  --dash: rgba(120, 159, 212, 0.25);
  --hero-orb: rgba(255, 182, 93, 0.3);
  --dot-glow: rgba(68, 209, 182, 0.9);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  color: var(--text);
  background:
    radial-gradient(1200px 700px at 8% -10%, var(--glow-a) 0%, transparent 56%),
    radial-gradient(1100px 700px at 98% 0%, var(--glow-b) 0%, transparent 62%),
    linear-gradient(165deg, var(--bg-1) 0%, var(--bg-0) 65%);
  font-family: "Avenir Next", "PingFang SC", "Source Han Sans SC", "Noto Sans CJK SC",
    "Microsoft YaHei", "Segoe UI", sans-serif;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.wrap {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 26px 0 58px;
}

.hero::after {
  content: "";
  position: absolute;
  width: 320px;
  height: 320px;
  right: -120px;
  top: 36px;
  border: 1px solid var(--hero-orb);
  border-radius: 42% 58% 56% 44%;
  filter: blur(0.3px);
  animation: float 7s ease-in-out infinite;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-12px);
  }
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 50px;
  padding: 22px 0 0;
  gap: 12px;
}

.hero .topbar {
  padding-top: 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 19px;
  letter-spacing: 0.4px;
  font-weight: 650;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), #66ffdf);
  box-shadow: 0 0 18px var(--dot-glow);
}

.topnav {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.topnav a {
  color: var(--muted);
  font-size: 14px;
}

.topnav a.active {
  color: var(--text);
}

.theme-switch {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
  background: var(--panel);
}

.theme-switch button {
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 6px 10px;
  font: inherit;
  font-size: 12px;
  font-weight: 650;
  cursor: pointer;
}

.theme-switch button.active {
  background: var(--accent);
  color: var(--btn-ink);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
  align-items: center;
}

.eyebrow {
  color: var(--accent-2);
  font-size: 13px;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  margin-bottom: 10px;
}

h1 {
  margin: 10px 0 14px;
  font-family: "STZhongsong", "Songti SC", "Noto Serif SC", "Georgia", serif;
  font-size: clamp(30px, 5.2vw, 58px);
  line-height: 1.08;
}

.lead {
  margin: 0 0 26px;
  color: var(--muted);
  line-height: 1.75;
  font-size: 16px;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 11px;
  border: 1px solid transparent;
  font-weight: 650;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #2dc1f3);
  color: var(--btn-ink);
}

.btn-ghost {
  color: var(--text);
  border-color: var(--line);
  background: var(--ghost-bg);
}

.hero-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px 20px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}

.kpi {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.kpi-item {
  background: var(--surface-deep);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
}

.kpi-item strong {
  display: block;
  font-size: 24px;
  margin-bottom: 4px;
}

section {
  padding: 38px 0;
}

.title {
  margin: 0 0 14px;
  font-size: clamp(26px, 3.6vw, 36px);
  font-family: "STZhongsong", "Songti SC", "Noto Serif SC", "Georgia", serif;
}

.sub {
  margin: 0 0 18px;
  color: var(--muted);
  line-height: 1.72;
}

.grid-3,
.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px 16px;
  box-shadow: var(--shadow);
}

.card h2,
.card h3 {
  margin: 0 0 8px;
}

.card h2 {
  font-size: 22px;
}

.card h3 {
  font-size: 18px;
}

.card p,
.meta {
  margin: 0;
  color: var(--muted);
  line-height: 1.68;
}

.meta {
  min-height: 86px;
  margin-bottom: 12px;
}

.contact {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.line {
  display: block;
  margin-top: 6px;
  color: var(--muted);
}

.tip,
.help {
  margin: 0 0 26px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-deep);
  color: var(--muted);
}

.help {
  margin-top: 28px;
  padding: 16px;
}

code {
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 1px 6px;
  color: var(--code-text);
  font-family: "SFMono-Regular", "JetBrains Mono", "Consolas", monospace;
  font-size: 13px;
}

.entry,
.policy {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  padding: 18px 16px;
}

.entry {
  margin-bottom: 14px;
}

.entry-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.entry h2 {
  margin: 0;
  font-size: 24px;
}

.date {
  color: var(--accent-2);
  font-size: 13px;
}

.entry ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.75;
}

.policy h2 {
  margin: 0 0 8px;
  font-size: 21px;
}

.policy p {
  margin: 0 0 12px;
  color: var(--muted);
  line-height: 1.76;
}

.section {
  padding: 12px 0;
  border-bottom: 1px dashed var(--dash);
}

.section:last-child {
  border-bottom: none;
}

footer {
  padding: 24px 0 36px;
  margin-top: 30px;
  color: var(--muted);
  font-size: 14px;
  border-top: 1px solid var(--line);
}

.fade-up {
  opacity: 0;
  transform: translateY(12px);
  animation: fadeUp 0.7s ease forwards;
}

.fade-up.d2 {
  animation-delay: 0.12s;
}

.fade-up.d3 {
  animation-delay: 0.2s;
}

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 920px) {
  .hero-grid,
  .contact,
  .grid-3,
  .grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-bottom: 40px;
  }

  .topbar {
    margin-bottom: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
  }

  .fade-up {
    opacity: 1;
    transform: none;
  }
}