:root {
  --bg: #f3f6f4;
  --bg-elevated: #ffffff;
  --bg-muted: #e9efeb;
  --ink: #14201a;
  --ink-soft: #4d5c54;
  --line: #d5e0d9;
  --accent: #07c160;
  --accent-deep: #06ad56;
  --bubble: #95ec69;
  --shadow: 0 24px 60px rgba(20, 32, 26, 0.16);
  --radius: 16px;
  --font-display: "Sora", "Noto Sans SC", sans-serif;
  --font-body: "Noto Sans SC", "Sora", sans-serif;
  --max: 1120px;
  --narrow: 720px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(7, 193, 96, 0.12), transparent 60%),
    radial-gradient(900px 420px at 90% 0%, rgba(20, 32, 26, 0.06), transparent 55%),
    var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}
.container.narrow { width: min(100% - 2rem, var(--narrow)); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
}
.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  object-fit: cover;
  display: block;
  box-shadow: 0 6px 14px rgba(7, 193, 96, 0.22);
  flex: 0 0 auto;
}
.nav-desktop {
  display: none;
  gap: 1.6rem;
  font-size: 0.92rem;
  color: var(--ink-soft);
  font-weight: 500;
}
.nav-desktop a:hover { color: var(--accent-deep); }
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.link-quiet {
  display: none;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border-radius: 12px;
  padding: 0.65rem 1.1rem;
  font-weight: 600;
  font-size: 0.92rem;
  border: 1px solid transparent;
  transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 10px 24px rgba(7, 193, 96, 0.25);
}
.btn-primary:hover {
  background: var(--accent-deep);
  transform: translateY(-1px);
}
.btn-ghost {
  background: #fff;
  border-color: var(--line);
  color: var(--ink);
}
.btn-ghost:hover { background: var(--bg-muted); }
.btn-lg { padding: 0.9rem 1.35rem; font-size: 1rem; border-radius: 14px; }

.hero {
  position: relative;
  padding: 3.5rem 0 4.5rem;
  overflow: hidden;
}
.hero-atmosphere {
  position: absolute;
  inset: 8% -10% auto auto;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(7, 193, 96, 0.18), transparent 68%);
  filter: blur(8px);
  pointer-events: none;
}
.hero-grid {
  position: relative;
  display: grid;
  gap: 2.5rem;
  align-items: center;
}
.brand-kicker {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(7, 193, 96, 0.08);
  border: 1px solid rgba(7, 193, 96, 0.25);
  color: var(--accent-deep);
  font-size: 0.78rem;
  font-weight: 600;
}
.pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.85); }
}
.hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 4vw, 2.7rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.text-accent { color: var(--accent-deep); }
.hero-summary {
  margin: 1.1rem 0 0;
  color: var(--ink-soft);
  font-size: 1.05rem;
  max-width: 38rem;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.5rem;
}
.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.25rem;
  margin: 1.4rem 0 0;
  padding: 0;
  list-style: none;
  color: var(--ink-soft);
  font-size: 0.82rem;
}
.hero-visual { display: flex; justify-content: center; }

.phone {
  width: min(100%, 340px);
  background: #ededed;
  border: 4px solid #14201a;
  border-radius: 36px;
  padding: 12px;
  box-shadow: var(--shadow);
  animation: float-in 0.8s ease both;
}
@keyframes float-in {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}
.phone-screen {
  background: #ededed;
  border-radius: 26px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 540px;
}
.chat-top {
  display: flex;
  justify-content: space-between;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  font-size: 0.86rem;
  font-weight: 600;
}
.chat-body {
  flex: 1;
  padding: 0.9rem;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 0.95rem;
}
.chat-time {
  text-align: center;
  color: #9aa59e;
  font-size: 0.68rem;
}
.msg { display: flex; gap: 0.55rem; align-items: flex-start; }
.msg-out { justify-content: flex-end; }
.avatar {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 0.75rem;
  font-weight: 700;
  flex: 0 0 auto;
}
.av-blue { background: #3b82f6; }
.av-indigo { background: #6366f1; }
.av-green { background: #059669; }
.av-amber { background: #f59e0b; }
.bubble {
  max-width: 200px;
  background: #fff;
  padding: 0.55rem 0.7rem;
  border-radius: 10px;
  border-top-left-radius: 2px;
  font-size: 0.78rem;
  line-height: 1.45;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}
.bubble-self {
  background: var(--bubble);
  border-top-left-radius: 10px;
  border-top-right-radius: 2px;
}
.chat-input {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.65rem 0.7rem;
  background: #f7f7f7;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
}
.input-fake {
  flex: 1;
  height: 32px;
  border-radius: 8px;
  background: #fff;
  display: flex;
  align-items: center;
  padding: 0 0.6rem;
  color: #9aa59e;
  font-size: 0.75rem;
}
.icon-round {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid #b7c0ba;
  display: grid;
  place-items: center;
  color: #6b776f;
  font-size: 0.65rem;
}

.section { padding: 4rem 0; }
.section-plain { background: var(--bg-elevated); border-block: 1px solid var(--line); }
.section-muted { background: rgba(233, 239, 235, 0.65); border-top: 1px solid var(--line); }
.section-head {
  text-align: center;
  max-width: 40rem;
  margin: 0 auto 2.5rem;
}
.section-head.left {
  text-align: left;
  margin-left: 0;
  max-width: none;
}
.section-head.split {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  text-align: left;
  max-width: none;
}
.section-head.split > div { max-width: 40rem; }
.section-head h1,
.section-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: -0.02em;
}
.section-head p { margin: 0.75rem 0 0; color: var(--ink-soft); }

.feature-grid,
.scenario-grid {
  display: grid;
  gap: 1.25rem;
}
.feature-item,
.scenario-item,
.post-item,
.faq-item {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.35rem;
}
.feature-id {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(7, 193, 96, 0.12);
  color: var(--accent-deep);
  display: grid;
  place-items: center;
  font-weight: 700;
  margin-bottom: 0.9rem;
}
.feature-item h3,
.scenario-item h3,
.scenario-item h2,
.post-item h2 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}
.feature-item p,
.scenario-item p,
.post-item p { margin: 0; color: var(--ink-soft); font-size: 0.92rem; }
.text-link {
  display: inline-block;
  margin-top: 0.9rem;
  color: var(--accent-deep);
  font-weight: 600;
  font-size: 0.9rem;
}

.faq-list { display: grid; gap: 0.8rem; }
.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item p {
  margin: 0.75rem 0 0;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.cta-band {
  background:
    linear-gradient(135deg, rgba(7, 193, 96, 0.12), rgba(20, 32, 26, 0.04)),
    var(--bg-elevated);
  border-top: 1px solid var(--line);
  text-align: center;
}
.cta-inner h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 1.9rem);
}
.cta-inner p { color: var(--ink-soft); margin: 0.7rem 0 1.2rem; }

.page-head { margin-bottom: 1.5rem; }
.page-head h1 {
  margin: 0.2rem 0;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  letter-spacing: -0.02em;
}
.eyebrow {
  margin: 0;
  color: var(--accent-deep);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.page-desc { color: var(--ink-soft); }
.meta { color: var(--ink-soft); font-size: 0.85rem; }
.page-cta { margin-top: 2rem; }
.related { margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--line); }
.related h2 { font-size: 1.1rem; }
.related ul { padding-left: 1.1rem; }
.related a { color: var(--accent-deep); }

.prose h2 { margin-top: 1.8rem; font-size: 1.25rem; }
.prose p, .prose li { color: var(--ink-soft); }
.prose ul { padding-left: 1.2rem; }

.post-list { display: grid; gap: 1rem; }
.post-grid { gap: 1.25rem; }
@media (min-width: 768px) {
  .post-grid { grid-template-columns: repeat(3, 1fr); }
}
.post-item time {
  display: inline-block;
  margin-top: 0.7rem;
  color: #7a8780;
  font-size: 0.8rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--bg-elevated);
  padding: 2rem 0;
  color: var(--ink-soft);
  font-size: 0.88rem;
}
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
}
.footer-links { display: flex; flex-wrap: wrap; gap: 1rem 1.25rem; }
.footer-links a:hover { color: var(--ink); }

@media (min-width: 768px) {
  .nav-desktop,
  .link-quiet { display: flex; }
  .feature-grid,
  .scenario-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-inner { flex-direction: row; }
}

@media (min-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 2rem;
  }
  .hero { padding: 4.5rem 0 5.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  .pulse,
  .phone { animation: none; }
  .btn-primary:hover { transform: none; }
}