:root {
  --bg: #060a12;
  --surface: #0c1423;
  --surface-2: #111c2f;
  --line: rgba(191, 219, 254, 0.14);
  --line-strong: rgba(191, 219, 254, 0.24);
  --text: #e6f0ff;
  --muted: rgba(230, 240, 255, 0.7);
  --soft: rgba(230, 240, 255, 0.5);
  --accent: #2affd4;
  --accent-2: #7dd3fc;
  --amber: #ffb520;
  --red: #ff5868;
  --radius: 18px;
  --max: 1180px;
  color-scheme: dark;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--text);
  background:
    linear-gradient(rgba(255, 255, 255, 0.026) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    radial-gradient(circle at 18% 0%, rgba(42, 255, 212, 0.15), transparent 28rem),
    radial-gradient(circle at 88% 10%, rgba(125, 211, 252, 0.12), transparent 26rem),
    linear-gradient(180deg, #060a12, #08101c 46%, #050810);
  background-size: 44px 44px, 44px 44px, auto, auto, auto;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-shell {
  width: min(100%, var(--max));
  margin: 0 auto;
  padding: 22px 22px 30px;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  position: sticky;
  top: 12px;
  z-index: 10;
  margin: 0 0 28px;
  padding: 12px 14px;
  border: 1px solid rgba(191, 219, 254, 0.12);
  border-radius: 22px;
  background: rgba(6, 10, 18, 0.76);
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.24);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #f8fbff;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 11px;
  display: inline-block;
  background: url("icon.svg") center / cover no-repeat;
  box-shadow: 0 0 0 1px rgba(42, 255, 212, 0.22), 0 0 26px rgba(42, 255, 212, 0.32);
}

.site-nav-main {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
  flex: 1;
}

.nav-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--muted);
  font-size: 13px;
}

.nav-utility {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav-language {
  min-height: 38px;
  min-width: 118px;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 12px;
  background: rgba(255, 255, 255, 0.05);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.nav-auth-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 12px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
  font-size: 12px;
}

.nav-auth-pill strong {
  color: var(--text);
}

.nav-auth-btn {
  border: 1px solid var(--line);
  border-radius: 999px;
  min-height: 38px;
  padding: 0 12px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  font-weight: 700;
  cursor: pointer;
}

.nav-auth-btn:hover {
  border-color: rgba(42, 255, 212, 0.5);
  background: rgba(42, 255, 212, 0.08);
}

.nav-links a,
.button {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.045);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.nav-links a:hover,
.button:hover {
  transform: translateY(-1px);
  border-color: rgba(42, 255, 212, 0.5);
  background: rgba(42, 255, 212, 0.08);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.07);
}

.nav-links a:focus-visible,
.button:focus-visible,
.brand:focus-visible,
.tag:focus-visible {
  outline: 2px solid rgba(42, 255, 212, 0.75);
  outline-offset: 3px;
}

.button.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
  color: #061018;
  font-weight: 800;
  box-shadow: 0 14px 38px rgba(42, 255, 212, 0.2);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 30px;
  align-items: stretch;
  padding: 42px 0 28px;
}

.eyebrow {
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.05;
  text-wrap: balance;
}

h1 {
  margin-top: 14px;
  font-size: clamp(42px, 7vw, 82px);
  letter-spacing: -0.06em;
}

h2 {
  font-size: clamp(28px, 4.5vw, 48px);
  letter-spacing: -0.045em;
}

h3 {
  font-size: 18px;
}

.lead {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.55;
  text-wrap: pretty;
}

.hero-actions,
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.meter-card,
.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.07), rgba(13, 21, 37, 0.83)),
    linear-gradient(135deg, rgba(42, 255, 212, 0.05), transparent 42%);
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.meter-card {
  padding: 24px;
  min-height: 390px;
  display: grid;
  align-content: space-between;
  position: relative;
  overflow: hidden;
}

.meter-card::before {
  content: "";
  position: absolute;
  inset: 18px;
  border: 1px solid rgba(42, 255, 212, 0.12);
  border-radius: 15px;
  pointer-events: none;
}

.meter-reading {
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: clamp(74px, 12vw, 132px);
  font-weight: 900;
  letter-spacing: -0.09em;
  color: var(--accent);
  text-shadow: 0 0 28px rgba(42, 255, 212, 0.28);
}

.meter-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 18px;
}

.stat {
  padding: 12px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid var(--line);
}

.stat strong {
  display: block;
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 20px;
  color: var(--text);
}

.stat span,
.muted {
  color: var(--muted);
}

.section {
  padding: 50px 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}

.grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card {
  padding: 20px;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

a.card:hover,
.card:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
}

.card p,
.card li {
  color: var(--muted);
  line-height: 1.55;
  text-wrap: pretty;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.tag {
  color: var(--muted);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.035);
  border-radius: 999px;
  padding: 7px 10px;
  font-size: 12px;
  transition: border-color 160ms ease, background 160ms ease, color 160ms ease;
}

.tag:hover {
  color: var(--text);
  border-color: rgba(42, 255, 212, 0.38);
  background: rgba(42, 255, 212, 0.07);
}

.notice {
  border: 1px solid rgba(255, 181, 32, 0.2);
  border-left: 3px solid var(--amber);
  background: linear-gradient(135deg, rgba(255, 181, 32, 0.11), rgba(255, 255, 255, 0.035));
  border-radius: 16px;
  padding: 16px 18px;
  color: var(--muted);
  line-height: 1.55;
}

.language-panel {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.045);
}

.language-panel label {
  color: var(--text);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.language-panel select {
  min-height: 40px;
  min-width: 180px;
  color: var(--text);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 0 14px;
  background: #0b1322;
}

.language-panel select:focus-visible {
  outline: 2px solid rgba(42, 255, 212, 0.75);
  outline-offset: 3px;
}

.auth-shell {
  width: min(100%, 560px);
  margin: 0 auto;
}

.auth-tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 20px 0 14px;
}

.auth-tab {
  border: 1px solid var(--line);
  border-radius: 12px;
  min-height: 40px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
  font-weight: 700;
  cursor: pointer;
}

.auth-tab.active {
  border-color: rgba(42, 255, 212, 0.44);
  color: var(--text);
  background: rgba(42, 255, 212, 0.08);
}

.auth-form {
  display: grid;
  gap: 10px;
}

.auth-form[hidden] {
  display: none;
}

.auth-form label {
  font-size: 12px;
  color: var(--soft);
  font-weight: 700;
}

.auth-form input {
  width: 100%;
  min-height: 42px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  padding: 0 12px;
}

.auth-form input:focus-visible,
.nav-language:focus-visible,
.nav-auth-btn:focus-visible {
  outline: 2px solid rgba(42, 255, 212, 0.75);
  outline-offset: 2px;
}

.auth-note {
  font-size: 12px;
  color: var(--soft);
  line-height: 1.55;
}

.timeline {
  display: grid;
  gap: 14px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr);
  gap: 18px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.055), rgba(13, 21, 37, 0.82));
  box-shadow: 0 18px 54px rgba(0, 0, 0, 0.22);
}

.timeline-item time {
  color: var(--accent);
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 13px;
  font-weight: 800;
}

.timeline-item p {
  color: var(--muted);
  line-height: 1.6;
}

.page-header {
  padding: 34px 0 18px;
  max-width: 820px;
}

.footer {
  border-top: 1px solid var(--line);
  margin-top: 40px;
  padding: 24px 0 14px;
  color: var(--soft);
  font-size: 13px;
}

.check-list {
  padding-left: 18px;
}

.check-list li {
  margin: 9px 0;
}

@media (max-width: 820px) {
  .site-shell {
    padding: 16px;
  }

  .site-nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-nav-main {
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
  }

  .nav-links {
    width: 100%;
  }

  .nav-utility {
    width: 100%;
    justify-content: flex-start;
  }

  .hero,
  .grid,
  .grid.two,
  .timeline-item {
    grid-template-columns: 1fr;
  }

  .meter-card {
    min-height: 320px;
  }
}