:root {
  --paper: #f6f4f1;
  --white: #ffffff;
  --ink: #2a3035;
  --mute: #6b7c85;
  --coral: #d4654a;
  --coral-soft: #f4e4df;
  --line: #e4ddd8;
  --foot: #ece8e4;
  --ok: #3d7a62;
  --sleep: #c4b8b0;
  --radius: 6px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: auto;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.75;
  font-size: 16px;
}

img,
svg {
  display: block;
  max-width: 100%;
}

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

a:hover {
  text-decoration: underline;
}

.bar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--white);
  border-bottom: 2px solid var(--coral);
}

.bar-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.mark {
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  justify-content: flex-end;
}

.nav a {
  color: var(--mute);
  font-size: 13px;
}

.nav a:hover {
  color: var(--coral);
  text-decoration: none;
}

.shell {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px 64px;
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 36px;
  align-items: center;
  padding: 48px 0 40px;
}

.kicker {
  margin: 0 0 10px;
  color: var(--coral);
  font-size: 13px;
  letter-spacing: 0.08em;
}

h1 {
  margin: 0 0 16px;
  font-size: 30px;
  line-height: 1.35;
  font-weight: 700;
}

.lead {
  margin: 0 0 12px;
  color: var(--mute);
}

.lead:last-child {
  margin-bottom: 0;
}

.rail {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
}

.rail h3 {
  margin: 0 0 16px;
  font-size: 14px;
  color: var(--mute);
  font-weight: 600;
}

.row {
  display: grid;
  grid-template-columns: 72px 1fr 56px;
  gap: 10px;
  align-items: center;
  margin-bottom: 14px;
}

.row:last-child {
  margin-bottom: 0;
}

.row span {
  font-size: 13px;
}

.track {
  height: 8px;
  background: #efe8e4;
  border-radius: 99px;
  overflow: hidden;
}

.fill {
  height: 100%;
  border-radius: 99px;
}

.fill-on {
  width: 92%;
  background: var(--ok);
}

.fill-sleep {
  width: 38%;
  background: var(--sleep);
}

.fill-off {
  width: 10%;
  background: var(--coral);
}

.tag {
  font-size: 12px;
  color: var(--mute);
  text-align: right;
}

.block {
  padding: 8px 0 36px;
}

.block h2 {
  margin: 0 0 14px;
  font-size: 24px;
  line-height: 1.4;
}

.block p {
  margin: 0 0 12px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 20px 0 8px;
}

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 18px;
}

.icon {
  width: 36px;
  height: 36px;
  margin-bottom: 12px;
  color: var(--coral);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.card p {
  margin: 0;
  color: var(--mute);
  font-size: 14px;
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 8px;
}

.panel {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.panel h3 {
  margin: 0 0 10px;
  font-size: 16px;
}

.panel p {
  margin: 0;
  color: var(--mute);
}

.flow {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  border-left: 2px solid var(--coral-soft);
}

.flow li {
  position: relative;
  padding: 0 0 22px 52px;
}

.flow li:last-child {
  padding-bottom: 0;
}

.num {
  position: absolute;
  left: -15px;
  top: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--coral);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.flow h3 {
  margin: 0 0 6px;
  font-size: 16px;
}

.flow p {
  margin: 0;
  color: var(--mute);
}

.table-wrap {
  overflow-x: auto;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-top: 16px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th,
td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

th {
  background: #faf7f5;
  color: var(--ink);
  font-weight: 600;
}

tr:last-child td {
  border-bottom: 0;
}

.faq details {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0;
  margin: 0 0 10px;
}

.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 16px 14px 42px;
  position: relative;
  font-weight: 600;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 18px;
  width: 12px;
  height: 12px;
  background: var(--coral);
  border-radius: 2px;
}

.faq details p {
  margin: 0;
  padding: 0 16px 16px 42px;
  color: var(--mute);
}

.foot {
  background: var(--foot);
  color: var(--mute);
  font-size: 13px;
}

.foot-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 28px 24px 36px;
}

.foot p {
  margin: 0 0 8px;
}

.foot p:last-child {
  margin-bottom: 0;
}

@media (max-width: 900px) {
  .hero,
  .cards,
  .split {
    grid-template-columns: 1fr;
  }

  .bar-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav {
    justify-content: flex-start;
  }

  h1 {
    font-size: 26px;
  }
}