:root {
  --mint: #63d6b0;
  --mint-deep: #249777;
  --ink: #17211f;
  --text: #35423f;
  --muted: #6c7a76;
  --line: #dce8e4;
  --soft: #f3faf7;
  --panel: #ffffff;
  --shadow: 0 18px 45px rgba(23, 33, 31, 0.1);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: #ffffff;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.7;
}

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

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

a:hover {
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.nav {
  max-width: 1160px;
  margin: 0 auto;
  padding: 14px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 21px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand img {
  width: 40px;
  height: 40px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.nav-links a {
  color: #33413e;
  font-size: 14px;
  font-weight: 700;
  padding: 8px 11px;
  border-radius: 6px;
}

.nav-links a:hover,
.nav-links a.active {
  background: var(--soft);
  color: var(--mint-deep);
  text-decoration: none;
}

.btn {
  border: 0;
  border-radius: 7px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 18px;
  font-size: 15px;
  font-weight: 800;
  cursor: pointer;
  transition: transform 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}

.btn-primary {
  color: #ffffff;
  background: var(--mint-deep);
  box-shadow: 0 12px 26px rgba(36, 151, 119, 0.22);
}

.btn-primary:hover {
  transform: translateY(-1px);
  background: #1d8065;
  text-decoration: none;
}

.btn-secondary {
  color: var(--mint-deep);
  background: #e9f8f2;
}

.btn-secondary:hover {
  background: #dbf2eb;
  text-decoration: none;
}

.hero {
  background:
    radial-gradient(circle at 85% 10%, rgba(99, 214, 176, 0.2), transparent 34%),
    linear-gradient(180deg, #f8fdfb 0%, #ffffff 70%);
}

.hero-inner {
  max-width: 1160px;
  min-height: calc(100vh - 70px);
  margin: 0 auto;
  padding: 78px 22px 62px;
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(420px, 1.05fr);
  gap: 48px;
  align-items: center;
}

.hero h1 {
  margin: 0 0 18px;
  color: var(--ink);
  font-size: clamp(38px, 6vw, 68px);
  line-height: 1.04;
  letter-spacing: 0;
}

.hero p {
  margin: 0 0 28px;
  max-width: 620px;
  color: #4f5d59;
  font-size: 19px;
}

.hero-actions,
.section-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

.proof-row {
  margin-top: 34px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.proof-item {
  padding: 14px 15px;
  border-left: 3px solid var(--mint);
  background: rgba(255, 255, 255, 0.72);
}

.proof-item strong {
  display: block;
  color: var(--ink);
  font-size: 15px;
}

.proof-item span {
  color: var(--muted);
  font-size: 13px;
}

.product-shot {
  position: relative;
}

.screen-frame {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #f8fbfa;
  box-shadow: var(--shadow);
}

.screen-frame img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: top left;
}

.floating-panel {
  position: absolute;
  right: -10px;
  bottom: -28px;
  width: min(300px, 54%);
  padding: 18px;
  border: 1px solid rgba(99, 214, 176, 0.38);
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: 0 16px 36px rgba(23, 33, 31, 0.13);
}

.floating-panel h3 {
  margin: 0 0 8px;
  color: var(--ink);
  font-size: 16px;
}

.floating-panel p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

main {
  overflow: hidden;
}

.section {
  padding: 84px 22px;
}

.section.alt {
  background: var(--soft);
}

.section-inner {
  max-width: 1160px;
  margin: 0 auto;
}

.section-head {
  max-width: 760px;
  margin: 0 0 34px;
}

.section-head.center {
  margin: 0 auto 38px;
  text-align: center;
}

.section-head h2,
.page-title h1 {
  margin: 0 0 13px;
  color: var(--ink);
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.15;
  letter-spacing: 0;
}

.section-head p,
.page-title p {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

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

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  padding: 24px;
}

.card h3 {
  margin: 0 0 9px;
  color: var(--ink);
  font-size: 20px;
  line-height: 1.35;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.version-title {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: baseline;
}

.version-date {
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.version-copy strong {
  color: var(--ink);
}

.icon {
  width: 42px;
  height: 42px;
  margin-bottom: 18px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  color: #ffffff;
  background: var(--mint-deep);
}

.icon svg {
  width: 22px;
  height: 22px;
  stroke-width: 2;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(420px, 1.08fr);
  gap: 48px;
  align-items: center;
}

.scene-list {
  display: grid;
  gap: 16px;
}

.scene {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 15px;
  align-items: start;
}

.scene-number {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background: #e5f7f1;
  color: var(--mint-deep);
  display: grid;
  place-items: center;
  font-weight: 900;
}

.scene h3 {
  margin: 0 0 4px;
  color: var(--ink);
  font-size: 19px;
}

.scene p {
  margin: 0;
  color: var(--muted);
}

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

.quote {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.quote p {
  color: #40514d;
}

.quote-user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #ffffff;
  background: linear-gradient(135deg, var(--mint-deep), var(--mint));
  font-weight: 900;
}

.quote-user strong {
  display: block;
  color: var(--ink);
  font-size: 14px;
}

.quote-user span {
  color: var(--muted);
  font-size: 12px;
}

.page-hero {
  background: linear-gradient(180deg, #f5fcf9 0%, #ffffff 100%);
  border-bottom: 1px solid var(--line);
}

.page-title {
  max-width: 1160px;
  margin: 0 auto;
  padding: 72px 22px 52px;
}

.feature-row {
  padding: 28px 0;
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 32px;
  border-top: 1px solid var(--line);
}

.feature-row h2 {
  margin: 0;
  color: var(--ink);
  font-size: 25px;
}

.feature-row p {
  margin: 0 0 14px;
  color: var(--muted);
}

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

.check-list li,
.plain-list li {
  position: relative;
  padding-left: 24px;
  color: var(--text);
}

.check-list li::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--mint-deep);
}

.plain-list li::before {
  content: "";
  position: absolute;
  top: 12px;
  left: 0;
  width: 10px;
  height: 2px;
  background: var(--mint-deep);
}

.steps {
  counter-reset: steps;
  display: grid;
  gap: 18px;
}

.step {
  counter-increment: steps;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
}

.step h2,
.step h3 {
  margin: 0 0 8px;
  color: var(--ink);
  font-size: 21px;
}

.step h2::before,
.step h3::before {
  content: counter(steps, decimal-leading-zero);
  margin-right: 10px;
  color: var(--mint-deep);
  font-weight: 900;
}

.code {
  margin: 14px 0 0;
  padding: 14px 16px;
  border-radius: var(--radius);
  color: #dff7ee;
  background: #17211f;
  overflow-x: auto;
  font-family: Consolas, Monaco, "Courier New", monospace;
  font-size: 14px;
}

.download-matrix {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
}

.download-card {
  min-height: 100%;
}

.platforms {
  display: grid;
  gap: 14px;
}

.platform {
  display: grid;
  grid-template-columns: 54px 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
}

.platform h2,
.platform h3 {
  margin: 0;
  color: var(--ink);
  font-size: 19px;
}

.platform p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.platform-icon {
  width: 54px;
  height: 54px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: #e7f7f1;
  color: var(--mint-deep);
  font-weight: 900;
}

.faq {
  display: grid;
  gap: 14px;
}

.faq details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  padding: 18px 20px;
}

.faq summary {
  color: var(--ink);
  cursor: pointer;
  font-weight: 800;
}

.faq p {
  margin: 10px 0 0;
  color: var(--muted);
}

.source-note {
  color: var(--muted);
  font-size: 13px;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #101816;
  color: #d4e3df;
}

.footer-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 42px 22px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: start;
}

.footer-inner a {
  color: #b8f0dc;
}

.footer-links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.modal[hidden] {
  display: none;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 24px;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(16, 24, 22, 0.56);
}

.modal-panel {
  position: relative;
  z-index: 1;
  width: min(720px, 100%);
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.28);
}

.modal-head {
  padding: 22px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.modal-head h2 {
  margin: 0;
  color: var(--ink);
  font-size: 24px;
}

.modal-close {
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 7px;
  background: #edf5f2;
  color: var(--ink);
  cursor: pointer;
  font-size: 24px;
}

.qr-grid {
  padding: 24px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.qr-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  text-align: center;
}

.qr-card img {
  width: 168px;
  height: 168px;
  margin: 0 auto 12px;
  image-rendering: pixelated;
}

.qr-card h3 {
  margin: 0 0 4px;
  color: var(--ink);
  font-size: 18px;
}

.qr-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.modal-foot {
  padding: 0 24px 24px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 920px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero-inner,
  .split,
  .download-matrix {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    min-height: auto;
    padding-top: 54px;
  }

  .product-shot {
    max-width: 680px;
  }

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

  .grid-2 {
    grid-template-columns: 1fr;
  }

  .feature-row {
    grid-template-columns: 1fr;
    gap: 14px;
  }
}

@media (max-width: 640px) {
  .nav-links {
    width: 100%;
  }

  .nav-links a {
    padding: 7px 8px;
  }

  .proof-row,
  .qr-grid {
    grid-template-columns: 1fr;
  }

  .floating-panel {
    position: static;
    width: 100%;
    margin-top: 14px;
  }

  .platform {
    grid-template-columns: 44px 1fr;
  }

  .platform .btn {
    grid-column: 1 / -1;
    width: 100%;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}