:root {
  --leaf: #4E8B61;
  --leaf-deep: #3F7452;
  --soft-green: #DDEEDF;
  --blush: #F2B6BC;
  --blush-light: #FCECEF;
  --amber-light: #FFF4DA;
  --app-bg: #F6FAF4;
  --surface: #FFFFFF;
  --ink: #203026;
  --muted: #6B7B70;
  --line: #E3E9E1;
  --radius-card: 14px;
  --radius-control: 12px;
  --radius-pill: 999px;
  --page-padding: 20px;
  --max-width: 1080px;
  --shadow-card: 0 10px 30px rgba(32, 48, 38, 0.08);
  --shadow-soft: 0 4px 16px rgba(32, 48, 38, 0.06);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--app-bg);
  color: var(--ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a:hover {
  color: var(--leaf-deep);
}

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

.container {
  width: min(var(--max-width), calc(100vw - 48px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(246, 250, 244, 0.86);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 18px;
  color: var(--ink);
}

.brand img {
  width: 34px;
  height: 34px;
  border-radius: 9px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  font-size: 15px;
}

.nav-links a {
  color: var(--muted);
  font-weight: 600;
}

.nav-links a:hover {
  color: var(--ink);
}

.nav-links a.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--leaf);
  font-weight: 700;
  font-size: 15px;
}

.nav-links a.nav-cta:hover {
  color: var(--leaf-deep);
}

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  font-size: 22px;
  color: var(--ink);
  cursor: pointer;
  padding: 6px;
}

.hero {
  padding: 72px 0 56px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: var(--soft-green);
  color: var(--leaf-deep);
  font-size: 13px;
  font-weight: 700;
  padding: 6px 13px;
  border-radius: var(--radius-pill);
  margin-bottom: 22px;
}

.hero-logo {
  width: 88px;
  height: 88px;
  border-radius: 22px;
  margin: 0 auto 20px;
  box-shadow: var(--shadow-card);
}

.hero h1 {
  margin: 0;
  font-size: clamp(38px, 6vw, 62px);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.hero .tagline {
  margin: 16px 0 0;
  font-size: clamp(18px, 2.6vw, 24px);
  color: var(--muted);
  font-weight: 500;
}

.hero .sub {
  max-width: 640px;
  margin: 18px auto 0;
  color: var(--muted);
  font-size: 16px;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  font-size: 15px;
  padding: 13px 22px;
  border-radius: var(--radius-control);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.18s ease;
}

.btn-primary {
  background: var(--leaf);
  color: #fff;
}

.btn-primary:hover {
  background: var(--leaf-deep);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(78, 139, 97, 0.28);
}

.btn-ghost {
  background: var(--surface);
  color: var(--ink);
  border-color: var(--line);
}

.btn-ghost:hover {
  border-color: var(--leaf);
  color: var(--leaf-deep);
}

.section {
  padding: 64px 0;
}

.section-alt {
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-head {
  max-width: 680px;
  margin: 0 auto 40px;
  text-align: center;
}

.kicker {
  display: inline-block;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--leaf);
  text-transform: uppercase;
}

.section-head h2 {
  margin: 10px 0 0;
  font-size: clamp(26px, 3.6vw, 36px);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.section-head p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 16px;
}

.grid {
  display: grid;
  gap: 18px;
}

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

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 24px;
  box-shadow: var(--shadow-soft);
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 16px;
}

.card h3 {
  margin: 0;
  font-size: 17px;
  line-height: 1.35;
}

.card p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 14.5px;
}

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

.tint-blush {
  background: var(--blush-light);
}

.tint-amber {
  background: var(--amber-light);
}

.role-banner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 18px;
  margin-top: 8px;
}

.role-card {
  border-radius: var(--radius-card);
  padding: 30px;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-card);
}

.role-card h3 {
  margin: 0;
  font-size: 21px;
}

.role-card .role-sub {
  margin: 6px 0 18px;
  color: var(--muted);
}

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

.feature-list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 14.5px;
  color: var(--ink);
}

.feature-list .check {
  flex: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--soft-green);
  color: var(--leaf-deep);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  margin-top: 2px;
}

.ai-note {
  margin-top: 26px;
  background: var(--amber-light);
  border: 1px solid #f2e0b4;
  border-radius: var(--radius-card);
  padding: 18px 20px;
  font-size: 10px;
  color: #7a6432;
}

.download-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 18px;
}

.store-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 14px;
  padding: 34px 24px;
}

.store-card .badge-soon {
  font-size: 12px;
  font-weight: 700;
  color: var(--leaf-deep);
  background: var(--soft-green);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
}

.store-card img {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  box-shadow: var(--shadow-soft);
}

.support-links {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

.support-links a {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 16px 18px;
  color: var(--ink);
  font-weight: 600;
}

.support-links a:hover {
  border-color: var(--leaf);
  color: var(--leaf-deep);
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.faq-item summary {
  cursor: pointer;
  padding: 18px 20px;
  font-weight: 700;
  font-size: 16px;
  list-style: none;
  color: var(--ink);
}

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

.faq-item summary::after {
  content: "+";
  float: right;
  color: var(--muted);
  font-weight: 700;
  font-size: 18px;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item p {
  margin: 0;
  padding: 0 20px 18px;
  color: var(--muted);
  font-size: 15px;
}

.legal {
  max-width: 840px;
}

.legal h1 {
  margin: 0 0 8px;
  font-size: clamp(30px, 5vw, 42px);
  line-height: 1.18;
  letter-spacing: -0.01em;
}

.legal .lead {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 16px;
}

.legal section {
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.legal section:first-of-type {
  border-top: 0;
}

.legal h2 {
  margin: 0 0 10px;
  font-size: 18px;
}

.legal p {
  margin: 0;
  color: var(--ink);
}

.manual-hero {
  padding: 74px 0 56px;
  text-align: center;
  background: linear-gradient(180deg, #edf6ec 0%, var(--app-bg) 100%);
}

.manual-hero h1 {
  margin: 0;
  font-size: clamp(34px, 5.8vw, 56px);
  line-height: 1.14;
  letter-spacing: -0.02em;
}

.manual-hero p {
  max-width: 680px;
  margin: 16px auto 0;
  color: var(--muted);
  font-size: 16px;
}

.manual-shell { padding-top: 44px; }

.manual-layout {
  display: grid;
  grid-template-columns: 205px minmax(0, 1fr);
  gap: 52px;
  align-items: start;
}

.manual-toc {
  position: sticky;
  top: 92px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.manual-toc summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  padding: 4px 8px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 750;
  list-style: none;
}

.manual-toc summary::-webkit-details-marker { display: none; }
.manual-toc summary::after { content: "+"; color: var(--leaf); font-size: 20px; }
.manual-toc[open] summary::after { content: "−"; }

.manual-toc-links {
  display: grid;
  gap: 3px;
  margin-top: 9px;
  padding-top: 9px;
  border-top: 1px solid var(--line);
}

.manual-toc a {
  padding: 7px 10px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
}

.manual-toc a:hover { background: var(--soft-green); color: var(--leaf-deep); }
.manual-content { min-width: 0; }

.manual-section { padding: 52px 0; border-top: 1px solid var(--line); }
.manual-section.is-first { padding-top: 0; border-top: 0; }

.manual-section h2 {
  margin: 8px 0 12px;
  font-size: clamp(25px, 3.6vw, 34px);
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.manual-section h3 { margin: 28px 0 12px; font-size: 18px; }
.manual-section > p { margin: 0; color: var(--muted); }
.manual-cards { margin-top: 24px; }
.manual-cards .card { padding: 20px; box-shadow: none; }

.manual-steps,
.manual-list { margin: 24px 0 0; padding-left: 22px; }

.manual-steps li,
.manual-list li { margin: 12px 0; padding-left: 4px; }

.manual-steps.compact li { margin: 8px 0; }

.manual-callout {
  margin-top: 24px;
  padding: 15px 18px;
  border: 1px solid #d5e8d7;
  border-left: 4px solid var(--leaf);
  border-radius: 0 var(--radius-control) var(--radius-control) 0;
  background: #f1f8f0;
  color: #42654b;
  font-size: 14.5px;
}

.manual-shot-placeholder {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 124px;
  margin: 28px 0 0;
  padding: 22px;
  border: 1px dashed #a8c5ab;
  border-radius: var(--radius-card);
  background: #fbfdf9;
}

.shot-icon {
  display: grid;
  flex: 0 0 56px;
  width: 56px;
  height: 56px;
  place-items: center;
  border-radius: 12px;
  background: var(--soft-green);
  color: var(--leaf-deep);
  font-size: 28px;
}

.manual-shot-placeholder figcaption { display: grid; gap: 2px; }
.manual-shot-placeholder strong { font-size: 15px; }
.manual-shot-placeholder span { color: var(--muted); font-size: 13px; }

.site-footer {
  border-top: 1px solid var(--line);
  padding: 44px 0;
  background: var(--surface);
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
}

.footer-brand {
  max-width: 320px;
}

.footer-brand .brand {
  margin-bottom: 10px;
}

.footer-brand p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.footer-links {
  display: flex;
  gap: 42px;
}

.footer-col h4 {
  margin: 0 0 12px;
  font-size: 14px;
  color: var(--muted);
  font-weight: 700;
}

.footer-col a {
  display: block;
  color: var(--ink);
  font-size: 14px;
  padding: 4px 0;
}

.footer-col a:hover {
  color: var(--leaf);
}

.footer-bottom {
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

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

@media (max-width: 860px) {
  .nav-links {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--surface);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0;
    border-bottom: 1px solid var(--line);
    display: none;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 13px 24px;
    border-top: 1px solid var(--line);
  }

  .nav-toggle {
    display: block;
  }

  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .grid-2,
  .role-banner,
  .download-panel {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 52px 0 40px;
  }

  .manual-hero {
    padding: 52px 0 42px;
  }

  .manual-layout {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .manual-toc { position: static; }
  .manual-toc-links { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .manual-section { padding: 40px 0; }

  .footer-grid {
    flex-direction: column;
  }
}

@media (min-width: 861px) and (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}