:root {
  --ink: #07111f;
  --ink-soft: #122033;
  --paper: #f6f8fb;
  --white: #ffffff;
  --muted: #607086;
  --line: #d9e1ea;
  --cyan: #16a7d7;
  --cyan-dark: #087da6;
  --coral: #e6604d;
  --success: #1d9b6c;
  --max-width: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei UI", "Noto Sans SC", sans-serif;
  letter-spacing: 0;
  line-height: 1.65;
}
body.nav-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 max(24px, calc((100vw - var(--max-width)) / 2));
  background: rgba(246, 248, 251, 0.96);
  border-bottom: 1px solid rgba(7, 17, 31, 0.1);
  backdrop-filter: blur(16px);
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-family: Bahnschrift, "Microsoft YaHei UI", sans-serif; font-size: 20px; font-weight: 700; }
.brand img { width: 38px; height: 38px; border-radius: 8px; }
.site-nav { display: flex; align-items: center; gap: 30px; font-size: 14px; font-weight: 600; }
.site-nav a, .site-footer a, .text-link { transition: color 160ms ease; }
.site-nav a:hover, .site-footer a:hover, .text-link:hover { color: var(--cyan-dark); }
.nav-toggle { display: none; width: 42px; height: 42px; padding: 10px; border: 0; background: transparent; cursor: pointer; }
.nav-toggle span { display: block; height: 2px; margin: 5px 0; background: var(--ink); }

.hero {
  position: relative;
  min-height: min(680px, calc(100svh - 118px));
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  color: var(--white);
  background-color: #07111f;
  background-image: url("/assets/activation-preview.png");
  background-size: cover;
  background-position: center 36%;
}
.hero-shade { position: absolute; inset: 0; background: rgba(4, 12, 23, 0.76); }
.hero-content { position: relative; width: min(var(--max-width), calc(100% - 48px)); margin: 0 auto; padding: 84px 0 88px; }
.eyebrow { margin: 0 0 10px; color: var(--cyan); font-size: 13px; font-weight: 800; text-transform: uppercase; }
.hero h1, .section h2, .purchase-band h2, .notice-band h2, .legal-main h1 {
  font-family: Bahnschrift, "Microsoft YaHei UI", sans-serif;
  letter-spacing: 0;
}
.hero h1 { max-width: 780px; margin: 0; font-size: clamp(42px, 7vw, 78px); line-height: 1.08; }
.hero-copy { max-width: 680px; margin: 22px 0 0; color: #dce7f2; font-size: 18px; line-height: 1.8; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 6px;
  font: 700 14px/1 "Microsoft YaHei UI", sans-serif;
  letter-spacing: 0;
  transition: background 160ms ease, border-color 160ms ease, color 160ms ease;
}
.button-primary { color: #001522; background: #39c7f2; }
.button-primary:hover { background: #72daf8; }
.button-secondary { color: currentColor; border-color: rgba(255,255,255,0.42); background: rgba(7,17,31,0.2); }
.button-secondary:hover { border-color: currentColor; }
.button-disabled { color: #7b8796; border-color: var(--line); background: #edf1f5; cursor: not-allowed; }

.signal-band {
  width: min(var(--max-width), calc(100% - 48px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--line);
}
.signal-band div { display: flex; flex-direction: column; gap: 4px; padding: 24px 0; }
.signal-band div + div { padding-left: 32px; border-left: 1px solid var(--line); }
.signal-band strong { font-size: 15px; }
.signal-band span { color: var(--muted); font-size: 13px; }

.section { width: min(var(--max-width), calc(100% - 48px)); margin: 0 auto; padding: 104px 0; }
.section-heading { max-width: 720px; }
.section-heading h2, .purchase-band h2, .notice-band h2 { margin: 0; font-size: clamp(30px, 4vw, 48px); line-height: 1.2; }
.section-heading > p:last-child { margin: 20px 0 0; color: var(--muted); font-size: 17px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 60px; }
.feature-grid article { padding-top: 22px; border-top: 3px solid var(--ink); }
.feature-grid article:nth-child(2) { border-color: var(--cyan); }
.feature-grid article:nth-child(3) { border-color: var(--coral); }
.feature-index { color: var(--muted); font: 700 13px/1 Bahnschrift, sans-serif; }
.feature-grid h3 { margin: 28px 0 10px; font-size: 21px; }
.feature-grid p { margin: 0; color: var(--muted); font-size: 14px; }

.purchase-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(380px, 0.82fr);
  gap: 72px;
  align-items: center;
  padding: 86px max(24px, calc((100vw - var(--max-width)) / 2));
  color: var(--white);
  background: var(--ink-soft);
}
.purchase-copy p:last-child { max-width: 620px; margin: 18px 0 0; color: #bdc9d7; }
.purchase-status {
  display: grid;
  grid-template-columns: 12px 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 22px;
  border: 1px solid #34455a;
  border-radius: 8px;
  background: #0b1727;
}
.purchase-status div { display: flex; flex-direction: column; }
.purchase-status span:last-child { color: #91a1b5; font-size: 13px; }
.status-dot { width: 10px; height: 10px; border-radius: 50%; background: #f3b43f; box-shadow: 0 0 0 5px rgba(243, 180, 63, 0.12); }

.section-heading.compact { max-width: none; }
.process-list { margin: 54px 0 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 36px; }
.process-list li { display: flex; gap: 18px; }
.process-list > li > span { flex: 0 0 34px; height: 34px; display: grid; place-items: center; color: var(--white); background: var(--ink); border-radius: 50%; font: 700 14px/1 Bahnschrift, sans-serif; }
.process-list h3 { margin: 0 0 8px; font-size: 19px; }
.process-list p { margin: 0; color: var(--muted); font-size: 14px; }

.notice-band {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(320px, 1fr) auto;
  gap: 48px;
  align-items: center;
  padding: 58px max(24px, calc((100vw - var(--max-width)) / 2));
  border-top: 1px solid var(--line);
  background: var(--white);
}
.notice-band h2 { font-size: clamp(25px, 3vw, 36px); }
.notice-band > p { margin: 0; color: var(--muted); }
.text-link { color: var(--cyan-dark); font-weight: 800; white-space: nowrap; }

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 40px;
  align-items: end;
  padding: 48px max(24px, calc((100vw - var(--max-width)) / 2));
  color: #93a2b4;
  background: #050c16;
  font-size: 13px;
}
.footer-brand { color: var(--white); font-size: 17px; }
.footer-brand img { width: 32px; height: 32px; }
.site-footer p { margin: 8px 0 0; }
.site-footer nav { display: flex; gap: 24px; }
.copyright { white-space: nowrap; }

.legal-page { background: var(--white); }
.legal-page .site-header { position: static; }
.header-action { min-height: 38px; color: var(--ink); border-color: var(--line); background: transparent; }
.legal-main { width: min(900px, calc(100% - 48px)); margin: 0 auto; padding: 80px 0 110px; }
.legal-main > header { padding-bottom: 40px; border-bottom: 1px solid var(--line); }
.legal-main h1 { margin: 0; font-size: clamp(40px, 6vw, 64px); line-height: 1.1; }
.legal-main > header > p:last-child { margin: 18px 0 0; color: var(--muted); }
.legal-content section { padding: 34px 0; border-bottom: 1px solid var(--line); }
.legal-content h2 { margin: 0 0 12px; font-size: 20px; }
.legal-content p { margin: 8px 0 0; color: #405065; }
.legal-footer { grid-template-columns: 1fr auto; align-items: center; }

@media (max-width: 820px) {
  .site-header { padding-inline: 18px; }
  .nav-toggle { display: block; }
  .site-nav {
    position: fixed;
    inset: 68px 0 auto;
    display: none;
    align-items: stretch;
    flex-direction: column;
    gap: 0;
    padding: 8px 18px 20px;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
  }
  .nav-open .site-nav { display: flex; }
  .site-nav a { padding: 15px 0; border-bottom: 1px solid var(--line); }
  .hero { min-height: 610px; background-position: 58% center; }
  .hero-content { width: calc(100% - 36px); padding: 72px 0 64px; }
  .hero h1 { font-size: clamp(38px, 12vw, 58px); }
  .hero-copy { font-size: 16px; }
  .signal-band { width: calc(100% - 36px); grid-template-columns: 1fr; }
  .signal-band div { padding: 18px 0; }
  .signal-band div + div { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); }
  .section { width: calc(100% - 36px); padding: 76px 0; }
  .feature-grid, .process-list { grid-template-columns: 1fr; gap: 34px; }
  .feature-grid { margin-top: 44px; }
  .purchase-band { grid-template-columns: 1fr; gap: 34px; padding: 68px 18px; }
  .purchase-status { grid-template-columns: 12px 1fr; }
  .purchase-status .button { grid-column: 1 / -1; width: 100%; }
  .notice-band { grid-template-columns: 1fr; gap: 20px; padding: 54px 18px; }
  .site-footer, .legal-footer { grid-template-columns: 1fr; gap: 24px; padding: 42px 18px; align-items: start; }
  .site-footer nav { flex-wrap: wrap; gap: 16px 22px; }
  .legal-main { width: calc(100% - 36px); padding: 58px 0 80px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}