:root {
  --page: #fdfbf6;
  --page-warm: #fefbf4;
  --section: #f1f6ed;
  --card: #fffef9;
  --inner: #fffcf8;
  --ink: #2e3830;
  --ink-soft: #758075;
  --ink-faint: #9ea39c;
  --green: #479e57;
  --green-deep: #3d8a4b;
  --green-soft: rgba(92, 184, 107, 0.16);
  --orange: #f2943d;
  --orange-soft: rgba(250, 168, 79, 0.18);
  --blue: #5290c7;
  --blue-soft: rgba(102, 163, 214, 0.16);
  --line: rgba(58, 68, 55, 0.12);
  --line-strong: rgba(58, 68, 55, 0.2);
  --shadow: 0 16px 40px rgba(89, 128, 82, 0.1);
  --header-h: 72px;
  --max: 1080px;
  --measure: 42rem;
  color-scheme: light;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--green-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--green);
}

:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: 16px;
  top: -40px;
  background: var(--ink);
  color: white;
  padding: 8px 12px;
  border-radius: 8px;
  z-index: 20;
}

.skip:focus {
  top: 12px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  height: var(--header-h);
  background: rgba(253, 251, 246, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: saturate(1.1) blur(10px);
}

.header-inner,
.footer-inner,
.section-inner {
  width: min(var(--max), calc(100% - 40px));
  margin-inline: auto;
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  min-width: 0;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 9px;
}

.brand-name {
  font-size: 17px;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.brand-en {
  color: var(--ink-soft);
  font-size: 13px;
  letter-spacing: 0.04em;
}

.nav-links {
  display: flex;
  gap: 22px;
  margin-left: auto;
}

.nav-links a,
.nav-drawer a {
  color: var(--ink);
  text-decoration: none;
  font-size: 15px;
}

.nav-links a:hover,
.nav-drawer a:hover {
  color: var(--green-deep);
}

.store-pill {
  margin: 0;
  flex: none;
  color: var(--ink-soft);
  font-size: 13px;
  letter-spacing: 0.01em;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 7px 12px;
  background: var(--card);
}

.nav-drawer {
  display: none;
}

.hero {
  padding: 72px 0 36px;
}

.hero-grid {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: 56px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--green-deep);
  font-size: 13px;
  font-weight: 620;
  letter-spacing: 0.16em;
}

h1,
h2,
h3 {
  font-weight: 640;
  letter-spacing: -0.03em;
  line-height: 1.18;
}

h1 {
  margin: 0;
  font-size: clamp(36px, 5vw, 60px);
}

.lede {
  max-width: 38rem;
  margin: 22px 0 0;
  color: var(--ink-soft);
  font-size: 18px;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  text-decoration: none;
  font-size: 16px;
  font-weight: 600;
}

.button-primary {
  background: var(--green);
  color: white;
}

.button-primary:hover {
  background: var(--green-deep);
  color: white;
}

.button-secondary {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line-strong);
}

.button-secondary:hover {
  color: var(--ink);
  border-color: var(--green);
}

.preview {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
  padding: 22px;
}

.preview-kicker {
  margin: 0;
  color: var(--ink-faint);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.preview h2 {
  margin: 8px 0 18px;
  font-size: 22px;
}

.task-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.task-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 48px;
  padding: 0 14px;
  background: var(--inner);
  border: 1px solid var(--line);
  border-radius: 14px;
}

.mark {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  flex: none;
  font-size: 13px;
}

.mark-done {
  background: var(--green-soft);
  color: var(--green-deep);
}

.mark-open {
  background: transparent;
  border: 1.5px solid var(--ink-faint);
}

.preview-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 12px;
}

.stat {
  padding: 14px;
  border-radius: 16px;
}

.stat p {
  margin: 0;
}

.stat-label {
  color: var(--ink-soft);
  font-size: 13px;
}

.stat-value {
  margin-top: 4px;
  font-size: 26px;
  font-weight: 650;
  letter-spacing: -0.03em;
}

.stat-earn {
  background: var(--orange-soft);
}

.stat-earn .stat-value {
  color: #c56a12;
}

.stat-balance {
  background: var(--green-soft);
}

.stat-balance .stat-value {
  color: var(--green-deep);
}

.preview-note {
  margin: 14px 0 0;
  color: var(--ink-faint);
  font-size: 13px;
}

.band {
  padding: 88px 0;
}

.band-alt {
  background: #f7faf4;
}

.band h2 {
  margin: 0;
  max-width: 16em;
  font-size: clamp(30px, 4vw, 44px);
}

.section-copy {
  max-width: var(--measure);
  margin: 18px 0 0;
  color: var(--ink-soft);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 40px;
}

.step,
.card,
.plan,
.faq-item,
.support-block {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 22px;
}

.step,
.card,
.plan {
  padding: 24px;
}

.step-index {
  margin: 0;
  color: var(--green-deep);
  font-size: 13px;
  font-weight: 650;
  letter-spacing: 0.14em;
}

.step h3,
.card h3,
.plan h3 {
  margin: 12px 0 8px;
  font-size: 22px;
}

.step p,
.card p,
.plan p,
.card li,
.plan li {
  color: var(--ink-soft);
}

.card-grid,
.plan-grid {
  display: grid;
  gap: 16px;
  margin-top: 36px;
}

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

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

.card ul,
.plan ul,
.plain-list {
  margin: 12px 0 0;
  padding-left: 1.15em;
}

.card li + li,
.plan li + li,
.plain-list li + li {
  margin-top: 6px;
}

.quiet-note {
  margin: 22px 0 0;
  color: var(--ink-soft);
  font-size: 15px;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 48px;
  align-items: start;
}

.fact-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.fact-list li {
  padding: 16px 18px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
}

.fact-list strong {
  display: block;
  margin-bottom: 4px;
}

.fact-list span {
  color: var(--ink-soft);
}

.goals {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

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

.goal-day { background: #f3faf3; }
.goal-week { background: #f3f7fc; }
.goal-month { background: #fff6ee; }

.goal p {
  margin: 8px 0 0;
  color: var(--ink-soft);
}

.faq-list,
.support-stack {
  display: grid;
  gap: 12px;
  margin-top: 32px;
}

.faq-item summary,
.support-block summary {
  cursor: pointer;
  font-weight: 620;
  padding: 18px 20px;
  list-style: none;
}

.faq-item summary::-webkit-details-marker,
.support-block summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after,
.support-block summary::after {
  content: "+";
  float: right;
  color: var(--ink-faint);
  font-weight: 500;
}

.faq-item[open] summary::after,
.support-block[open] summary::after {
  content: "–";
}

.faq-item .answer,
.support-block .answer {
  padding: 0 20px 18px;
  color: var(--ink-soft);
}

.faq-item .answer p,
.support-block .answer p {
  margin: 0;
}

.support-block .answer p + p,
.legal p + p {
  margin-top: 12px;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 36px 0 48px;
}

.footer-inner {
  display: grid;
  gap: 14px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 650;
}

.footer-brand img {
  width: 28px;
  height: 28px;
  border-radius: 7px;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-nav a {
  color: var(--ink);
  text-decoration: none;
}

.copyright,
.beian {
  margin: 0;
  color: var(--ink-faint);
  font-size: 14px;
}

.beian a {
  color: inherit;
}

.page-hero {
  padding: 56px 0 8px;
}

.page-hero h1 {
  font-size: clamp(34px, 4vw, 52px);
}

.legal {
  width: min(740px, calc(100% - 40px));
  margin: 12px auto 72px;
}

.legal h2 {
  margin: 40px 0 12px;
  font-size: 26px;
  max-width: none;
}

.legal h3 {
  margin: 22px 0 8px;
  font-size: 18px;
}

.legal p,
.legal li {
  color: var(--ink-soft);
}

.updated {
  color: var(--ink-faint);
  font-size: 14px;
}

.support-intro {
  width: min(var(--max), calc(100% - 40px));
  margin: 8px auto 0;
  color: var(--ink-soft);
}

.support-layout {
  width: min(var(--max), calc(100% - 40px));
  margin: 28px auto 80px;
  display: grid;
  gap: 28px;
}

.support-group h2 {
  font-size: 28px;
}

@media (max-width: 860px) {
  .header-inner {
    gap: 12px;
  }

  .nav-links,
  .store-pill {
    display: none;
  }

  .nav-drawer {
    display: block;
    margin-left: auto;
    position: relative;
  }

  .nav-drawer summary {
    list-style: none;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    padding: 0 12px;
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    background: var(--card);
    cursor: pointer;
  }

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

  .nav-drawer nav {
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    width: min(260px, 78vw);
    padding: 8px;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 16px;
    box-shadow: var(--shadow);
    display: grid;
  }

  .nav-drawer a {
    min-height: 44px;
    display: flex;
    align-items: center;
    padding: 0 12px;
    border-radius: 10px;
  }

  .hero {
    padding-top: 40px;
  }

  .hero-grid,
  .steps,
  .card-grid,
  .plan-grid,
  .split,
  .goals {
    grid-template-columns: 1fr;
  }

  .band {
    padding: 64px 0;
  }

  .header-inner,
  .section-inner,
  .hero-grid,
  .support-intro,
  .support-layout {
    width: min(var(--max), calc(100% - 32px));
  }
}

@media (max-width: 420px) {
  .preview-stats {
    grid-template-columns: 1fr;
  }

  .brand-en {
    display: none;
  }
}