:root {
  color-scheme: light;
  --text: #050505;
  --muted: #777b84;
  --soft: #f5f6f8;
  --line: #e8e9ec;
  --panel: #ffffff;
  --mint: #98fce4;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  background: #ffffff;
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

/* ── 头尾:退后的轻线(环境信息该轻,主角才该重)──────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  background: rgb(255 255 255 / 82%);
  padding: 0 clamp(20px, 5vw, 72px);
  backdrop-filter: blur(18px);
}

.brand,
.nav-links,
.site-footer nav {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-size: 17px;
  font-weight: 800;
}

.nav-links,
.site-footer nav {
  gap: 22px;
  color: #55585f;
  font-size: 14px;
  font-weight: 600;
}

.nav-links a:hover,
.site-footer nav a:hover {
  color: var(--text);
}

/* ── 主视觉:活的液态沙漏(单列居中,一个主角)────────────────────────────── */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: calc(100vh - 64px);
  justify-content: center;
  padding: clamp(24px, 4vw, 48px) 20px clamp(56px, 8vw, 96px);
  text-align: center;
}

.hourglass {
  width: clamp(300px, 52vw, 460px);
}

.hourglass svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;   /* 阴影不被 viewBox 裁出方形边 */
}

#blob {
  fill: #ffffff;
  stroke: rgb(5 5 5 / 7%);
  stroke-width: 0.5;
  filter: drop-shadow(0 20px 44px rgb(20 24 32 / 10%)) drop-shadow(0 4px 12px rgb(20 24 32 / 5%));
}

#coins .shell {
  fill: #ffffff;
  stroke: #e2e4e8;
  stroke-width: 0.45;
}

h1,
h2,
h3,
p {
  letter-spacing: 0;
}

.hero h1 {
  margin: clamp(28px, 4vw, 44px) 0 0;
  font-size: clamp(38px, 5.4vw, 64px);
  line-height: 1.04;
  font-weight: 800;
}

.lede,
.page-lede {
  max-width: 560px;
  margin: 18px auto 0;
  color: #565a62;
  font-size: clamp(16px, 1.35vw, 19px);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 24px;
  background: #ffffff;
  font-size: 15px;
  font-weight: 700;
}

.button.primary {
  border-color: #050505;
  background: #050505;
  color: #ffffff;
}

/* ── 核心功能:四格,商店同款文案 ──────────────────────────────────────────── */
.features {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.features article {
  min-height: 240px;
  border-right: 1px solid var(--line);
  padding: 30px;
}

.features article:last-child {
  border-right: 0;
}

.features span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.features h2 {
  margin: 48px 0 10px;
  font-size: 22px;
  line-height: 1.25;
}

.features p,
.notice p,
.content-block p {
  color: #555a62;
  line-height: 1.72;
}

.features p {
  margin: 0;
  font-size: 15px;
}

/* ── 交易方式:App 内那张说明书原样摊开(一行一项)────────────────────────── */
.methods {
  max-width: 860px;
  margin: 0 auto;
  padding: clamp(56px, 8vw, 96px) 20px;
}

.methods h2 {
  margin: 0 0 28px;
  font-size: clamp(28px, 3.4vw, 40px);
}

.methods ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.methods li {
  display: flex;
  align-items: baseline;
  gap: 16px;
  border-top: 1px solid var(--line);
  padding: 16px 0;
}

.methods li:last-child {
  border-bottom: 1px solid var(--line);
}

.methods strong {
  flex: 0 0 7em;
  font-size: 16px;
  font-weight: 700;
}

.methods span {
  color: #565a62;
  font-size: 15px;
}

/* ── 立场:一切摊在链上 + 风险直言 ────────────────────────────────────────── */
.notice {
  display: grid;
  grid-template-columns: 0.72fr 1fr;
  gap: 28px;
  padding: clamp(48px, 7vw, 86px) clamp(20px, 5vw, 72px);
  background: var(--soft);
}

.notice h2 {
  margin: 0;
  font-size: clamp(32px, 4vw, 54px);
  line-height: 1.05;
}

.notice p {
  max-width: 680px;
  margin: 0 0 14px;
  font-size: 17px;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 86px;
  padding: 0 clamp(20px, 5vw, 72px);
  color: #34363b;
}

/* ── 内页(支持 / 用户协议 / 隐私)──────────────────────────────────────────── */
.eyebrow {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

.page {
  min-height: calc(100vh - 150px);
  padding: clamp(54px, 8vw, 104px) clamp(20px, 5vw, 72px);
}

.page h1 {
  margin: 0;
  font-size: clamp(44px, 7vw, 84px);
  line-height: 1.02;
  font-weight: 800;
}

.page .page-lede {
  margin-left: 0;
}

.content-block {
  max-width: 820px;
  margin-top: 44px;
}

.content-block h2 {
  margin: 34px 0 10px;
  font-size: 26px;
}

.content-block h3 {
  margin: 28px 0 8px;
  font-size: 18px;
}

.content-block p {
  margin: 0 0 12px;
  font-size: 16px;
}

.content-block a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.contact-grid a {
  display: grid;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
  text-decoration: none;
}

.contact-grid span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.contact-grid strong {
  color: var(--text);
  font-size: 17px;
}

.faq-item {
  border-top: 1px solid var(--line);
  padding-top: 20px;
  margin-top: 20px;
}

.legal-block p strong {
  display: inline-block;
  min-width: 42px;
  color: var(--text);
  font-weight: 700;
}

.legal-block ul {
  margin: 10px 0 16px;
  padding-left: 22px;
  color: #555a62;
  line-height: 1.72;
}

.muted {
  color: var(--muted);
}

/* ── 响应式 ──────────────────────────────────────────────────────────────── */
@media (max-width: 980px) {
  .features {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .features article:nth-child(2) {
    border-right: 0;
  }

  .features article:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

  .notice {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .nav-links {
    gap: 14px;
    font-size: 13px;
  }

  .brand {
    font-size: 16px;
  }

  .hourglass {
    width: min(78vw, 340px);
  }

  .hero h1 {
    font-size: clamp(34px, 10vw, 46px);
  }

  .features {
    grid-template-columns: 1fr;
  }

  .features article,
  .features article:nth-child(2) {
    min-height: 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 24px 20px;
  }

  .features article:last-child {
    border-bottom: 0;
  }

  .features h2 {
    margin-top: 36px;
  }

  .methods strong {
    flex-basis: 6em;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding-block: 22px;
  }

  .site-footer nav {
    flex-wrap: wrap;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }
}