:root {
  --page: #f5f5f7;
  --surface: #ffffff;
  --ink: #0b0b0c;
  --ink-soft: #333336;
  --muted: #6e6e73;
  --line: #d9d9df;
  --line-soft: #ececf0;
  --dark: #080808;
  --dark-soft: #161616;
  --dark-muted: #a1a1a6;
  --white: #ffffff;
  --shadow: 0 22px 70px rgba(0, 0, 0, 0.12);
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: var(--page);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

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

button,
input {
  font: inherit;
}

.site-shell {
  overflow: hidden;
  background: var(--page);
}

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

.site-header {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(8, 8, 8, 0.84);
  color: var(--white);
  backdrop-filter: blur(22px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: max-content;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0;
}

.brand-logo {
  width: 30px;
  height: 30px;
  border-radius: 7px;
  object-fit: contain;
  background: var(--white);
}

.nav-menu {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 30px;
  width: 100%;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 22px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
  font-weight: 500;
}

.nav-list a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  transition: color 180ms ease;
}

.nav-list a:hover {
  color: var(--white);
}

.nav-list .is-disabled {
  color: rgba(255, 255, 255, 0.44);
  cursor: default;
}

.nav-list .has-dropdown {
  position: relative;
}

.nav-list .submenu {
  position: absolute;
  top: 100%;
  right: 0;
  min-width: 118px;
  margin: 6px 0 0;
  padding: 8px;
  list-style: none;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(22, 22, 22, 0.96);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.28);
}

.nav-list .submenu a {
  display: block;
  padding: 8px 10px;
  min-height: auto;
  color: rgba(255, 255, 255, 0.76);
  border-radius: 6px;
}

.nav-list .submenu a:hover {
  color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

.nav-actions {
  display: flex;
  position: relative;
  align-items: center;
  gap: 10px;
  min-width: max-content;
}

.nav-actions.has-dropdown::after {
  content: '';
  position: absolute;
  top: 100%;
  right: 0;
  width: 100%;
  min-width: 112px;
  height: 8px;
}

.nav-actions.has-dropdown .submenu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 112px;
  padding: 6px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(18, 18, 18, 0.98);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.28);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  pointer-events: none;
  transition: opacity 0.16s ease, transform 0.16s ease, visibility 0.16s ease;
  z-index: 30;
}

.nav-actions.has-dropdown:hover .submenu,
.nav-actions.has-dropdown:focus-within .submenu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.nav-actions.has-dropdown .submenu a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 14px;
  border-radius: 6px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
  line-height: 1;
  text-align: center;
  white-space: nowrap;
}

.nav-actions.has-dropdown .submenu a:hover {
  color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 0 19px;
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 700;
  letter-spacing: 0;
  transition: transform 180ms ease, background 180ms ease, color 180ms ease, border-color 180ms ease;
  white-space: nowrap;
}

.nav-login {
  min-height: 34px;
  padding: 0 15px;
  font-size: 14px;
  font-weight: 500;
}

.button:hover {
  transform: translateY(-1px);
}

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

.button-primary:hover {
  background: #ededed;
}

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

.button-dark:hover {
  background: #242424;
}

.button-ghost {
  color: var(--ink);
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.72);
}

.button-ghost:hover {
  border-color: #bdbdc3;
  background: var(--white);
}

.button-light {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.08);
}

.button-light:hover {
  border-color: rgba(255, 255, 255, 0.46);
  background: rgba(255, 255, 255, 0.14);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  color: var(--white);
  background: rgba(255, 255, 255, 0.08);
  cursor: pointer;
}

.menu-toggle span,
.menu-toggle::before,
.menu-toggle::after {
  display: block;
  width: 17px;
  height: 2px;
  margin: 4px auto;
  border-radius: 2px;
  background: currentColor;
  content: "";
}

.hero {
  padding: 142px 0 74px;
  background: var(--dark);
  color: var(--white);
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
  padding: 7px 12px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.74);
  background: rgba(255, 255, 255, 0.06);
  font-size: 13px;
  font-weight: 600;
}

.hero h1 {
  margin: 0;
  color: var(--white);
  font-size: 76px;
  line-height: 1.04;
  letter-spacing: 0;
  font-weight: 800;
}

.hero-copy {
  max-width: 790px;
  margin: 24px auto 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 21px;
  line-height: 1.72;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 34px;
  flex-wrap: wrap;
}

.hero-proof {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  max-width: 880px;
  margin: 48px auto 0;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
}

.proof-item {
  padding: 18px 16px;
  background: rgba(255, 255, 255, 0.04);
  text-align: left;
}

.proof-value {
  display: block;
  color: var(--white);
  font-size: 22px;
  line-height: 1.2;
  font-weight: 800;
}

.proof-label {
  display: block;
  margin-top: 6px;
  color: rgba(255, 255, 255, 0.54);
  font-size: 13px;
  line-height: 1.45;
}

.product-preview {
  width: min(100% - 48px, 1160px);
  margin: -24px auto 0;
  position: relative;
}

.hero-media {
  width: 100%;
  margin: 0;
  padding: 12px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow);
}

.preview-tabbar {
  display: flex;
  justify-content: center;
  margin-bottom: 14px;
}

.preview-tabs {
  display: flex;
  max-width: 100%;
  gap: 4px;
  padding: 5px;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #f1f1f3;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.08);
  scrollbar-width: none;
}

.preview-tabs::-webkit-scrollbar {
  display: none;
}

.preview-tab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 18px;
  border: 0;
  border-radius: 999px;
  color: var(--ink-soft);
  background: transparent;
  cursor: pointer;
  font-weight: 700;
  white-space: nowrap;
  transition: background 160ms ease, color 160ms ease, box-shadow 160ms ease;
}

.preview-tab.is-active {
  color: var(--ink);
  background: var(--surface);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.preview-image-shell {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: #f4f4f4;
}

.preview-page {
  display: none;
  width: 100%;
  aspect-ratio: 16 / 9;
  min-height: 520px;
  place-items: center;
  padding: 32px;
  background:
    linear-gradient(135deg, rgba(0, 0, 0, 0.03) 25%, transparent 25%) 0 0 / 24px 24px,
    linear-gradient(135deg, transparent 75%, rgba(0, 0, 0, 0.03) 75%) 0 0 / 24px 24px,
    #f7f7f9;
  color: var(--muted);
  text-align: center;
}

.preview-page.is-active {
  display: grid;
}

.preview-page strong {
  display: block;
  color: var(--ink);
  font-size: 24px;
  line-height: 1.3;
}

.preview-page span {
  display: block;
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.6;
}

.section {
  padding: 108px 0;
}

.section-white {
  background: var(--surface);
}

.section-dark {
  background: var(--dark);
  color: var(--white);
}

.section-kicker {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.section-dark .section-kicker {
  color: var(--dark-muted);
}

.section-title {
  margin: 0;
  max-width: 780px;
  color: inherit;
  font-size: 46px;
  line-height: 1.12;
  letter-spacing: 0;
  font-weight: 800;
}

.section-lead {
  max-width: 760px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.76;
}

.section-dark .section-lead {
  color: rgba(255, 255, 255, 0.66);
}

.centered {
  text-align: center;
}

.centered .section-title,
.centered .section-lead {
  margin-right: auto;
  margin-left: auto;
}

.workflow {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1px;
  margin-top: 48px;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: var(--line-soft);
}

.workflow-step {
  min-height: 178px;
  padding: 24px;
  background: var(--surface);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 999px;
  color: var(--white);
  background: var(--ink);
  font-size: 13px;
  font-weight: 800;
}

.workflow-step h3 {
  margin: 18px 0 8px;
  font-size: 19px;
  line-height: 1.28;
}

.workflow-step p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 46px;
}

.feature-card {
  display: flex;
  flex-direction: column;
  min-height: 312px;
  padding: 28px;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: var(--surface);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  color: var(--white);
  background: var(--ink);
  font-size: 18px;
  font-weight: 800;
}

.feature-icon i {
  line-height: 1;
}

.feature-card h3 {
  margin: 22px 0 10px;
  font-size: 24px;
  line-height: 1.22;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.feature-list {
  display: grid;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  color: var(--ink-soft);
  list-style: none;
  font-size: 14px;
  line-height: 1.6;
}

.feature-list li {
  position: relative;
  padding-left: 16px;
}

.feature-list li::before {
  position: absolute;
  top: 10px;
  left: 0;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--ink);
  content: "";
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 46px;
}

.pricing-card {
  display: flex;
  flex-direction: column;
  min-height: 488px;
  padding: 30px;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: var(--surface);
}

.pricing-card.is-featured {
  color: var(--white);
  border-color: var(--dark);
  background: var(--dark);
}

.plan-tag {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.is-featured .plan-tag {
  border-color: rgba(255, 255, 255, 0.18);
  color: rgba(255, 255, 255, 0.7);
}

.pricing-card h3 {
  margin: 24px 0 10px;
  font-size: 28px;
  line-height: 1.2;
}

.pricing-note {
  margin: 0;
  color: var(--muted);
  min-height: 58px;
}

.is-featured .pricing-note,
.is-featured .plan-list {
  color: rgba(255, 255, 255, 0.64);
}

.plan-list {
  display: grid;
  gap: 12px;
  margin: 26px 0;
  padding: 0;
  color: var(--ink-soft);
  list-style: none;
}

.plan-list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.plan-list li::before {
  flex: 0 0 auto;
  margin-top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  content: "";
  opacity: 0.72;
}

.pricing-card .button {
  margin-top: auto;
}

.page-link-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 46px;
}

.page-link-card {
  display: flex;
  flex-direction: column;
  min-height: 276px;
  padding: 32px;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: var(--surface);
}

.page-link-card h3 {
  margin: 0 0 12px;
  font-size: 30px;
  line-height: 1.2;
}

.page-link-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.page-link-card .button {
  width: fit-content;
  margin-top: auto;
}

.download-layout {
  display: grid;
  grid-template-columns: 0.96fr 1.04fr;
  gap: 42px;
  align-items: center;
  margin-top: 48px;
}

.download-box {
  padding: 34px;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: var(--surface);
}

.download-box h3 {
  margin: 0 0 12px;
  font-size: 30px;
  line-height: 1.2;
}

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

.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.download-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: 30px;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: var(--line-soft);
}

.download-meta span {
  display: block;
  padding: 14px 12px;
  background: #fafafa;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

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

.software-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: var(--surface);
}

.software-item strong {
  display: block;
  line-height: 1.3;
}

.software-item span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.software-badge {
  flex: 0 0 auto;
  padding: 5px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.cta-band {
  padding: 88px 0;
  color: var(--white);
  background: var(--dark);
  text-align: center;
}

.cta-band h2 {
  margin: 0;
  font-size: 44px;
  line-height: 1.16;
  letter-spacing: 0;
}

.cta-band p {
  max-width: 680px;
  margin: 18px auto 0;
  color: rgba(255, 255, 255, 0.64);
  font-size: 18px;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 30px;
  flex-wrap: wrap;
}

.contact-section {
  padding: 96px 0;
  color: var(--white);
  background: var(--dark);
}

.contact-layout {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 40px;
  align-items: center;
}

.contact-section h2 {
  margin: 0;
  font-size: 42px;
  line-height: 1.18;
}

.contact-section p {
  max-width: 560px;
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.62);
  font-size: 18px;
  line-height: 1.75;
}

.qr-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.qr-card {
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
  text-align: center;
}

.qr-card img {
  width: 180px;
  height: 180px;
  margin: 0 auto;
  border-radius: 8px;
  object-fit: cover;
  background: var(--white);
}

.qr-card strong {
  display: block;
  margin-top: 16px;
  color: var(--white);
  font-size: 18px;
  line-height: 1.3;
}

.qr-card span {
  display: block;
  margin-top: 6px;
  color: rgba(255, 255, 255, 0.58);
  font-size: 14px;
}

.site-footer {
  padding: 34px 0;
  border-top: 1px solid var(--line-soft);
  background: var(--surface);
  color: var(--muted);
  font-size: 13px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

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

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

.login-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(0, 0, 0, 0.62);
  backdrop-filter: blur(18px);
}

.login-modal-content {
  position: relative;
  width: min(100%, 390px);
  padding: 24px;
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.22);
}

.btn-close-modal {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: 999px;
  color: var(--muted);
  background: #f1f1f3;
  cursor: pointer;
  font-size: 22px;
  line-height: 1;
}

.login-header {
  margin-bottom: 20px;
  text-align: center;
}

.login-header h1 {
  margin: 0;
  font-size: 24px;
  line-height: 1.2;
}

.qrcode-img {
  display: grid;
  width: 260px;
  height: 260px;
  margin: 0 auto 16px;
  place-items: center;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: #f8f8fa;
  color: var(--muted);
  text-align: center;
}

.qrcode-img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.qrcode-tip {
  margin-bottom: 12px;
  color: var(--muted);
  text-align: center;
  font-size: 14px;
}

.qrcode-status {
  padding: 10px;
  border-radius: 8px;
  text-align: center;
  font-size: 14px;
  font-weight: 700;
}

.qrcode-status.waiting {
  color: #555;
  background: #f1f1f3;
}

.qrcode-status.success {
  color: #115c2e;
  background: #e7f7ee;
}

.qrcode-status.expired {
  color: #8a1f1f;
  background: #fdecec;
}

.qrcode-refresh {
  display: none;
  min-height: 36px;
  margin-top: 12px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  background: var(--surface);
  cursor: pointer;
}

.qrcode-actions {
  text-align: center;
}

@media (max-width: 1120px) {
  .workflow {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .download-layout {
    grid-template-columns: 1fr;
  }

  .contact-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 860px) {
  .container {
    width: min(100% - 32px, var(--container));
  }

  .nav {
    height: 60px;
  }

  .menu-toggle {
    display: inline-block;
  }

  .nav-menu {
    position: fixed;
    top: 60px;
    right: 16px;
    left: 16px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
    padding: 18px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 8px;
    background: rgba(12, 12, 12, 0.96);
    box-shadow: 0 24px 54px rgba(0, 0, 0, 0.3);
  }

  body.nav-open .nav-menu {
    display: flex;
  }

  .nav-list {
    display: grid;
    gap: 8px;
  }

  .nav-list a {
    min-height: 40px;
  }

  .nav-actions {
    width: 100%;
  }

  .nav-actions .button {
    width: 100%;
  }

  .hero {
    padding: 116px 0 58px;
  }

  .hero h1 {
    font-size: 52px;
  }

  .hero-copy {
    font-size: 18px;
  }

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

  .hero-media {
    padding: 10px;
  }

  .product-preview {
    width: min(100% - 24px, 1160px);
  }

  .section {
    padding: 78px 0;
  }

  .section-title,
  .cta-band h2 {
    font-size: 36px;
  }

  .section-lead {
    font-size: 17px;
  }

  .features-grid,
  .pricing-grid,
  .page-link-grid,
  .workflow {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 560px) {
  .hero h1 {
    font-size: 38px;
  }

  .hero-actions,
  .cta-actions,
  .download-actions {
    flex-direction: column;
  }

  .button,
  .hero-actions .button,
  .cta-actions .button,
  .download-actions .button {
    width: 100%;
  }

  .hero-proof,
  .download-meta,
  .qr-grid {
    grid-template-columns: 1fr;
  }

  .section-title,
  .cta-band h2 {
    font-size: 30px;
  }

  .feature-card,
  .pricing-card,
  .download-box {
    padding: 24px;
  }

  .preview-tabbar {
    justify-content: flex-start;
    padding: 12px;
  }

  .preview-tab {
    min-height: 36px;
    padding: 0 14px;
    font-size: 14px;
  }

  .preview-page {
    min-height: 360px;
    padding: 22px;
  }
}