:root {
  --paper: #f7f3e9;
  --paper-deep: #efe8da;
  --surface: #fffdf8;
  --ink: #18221c;
  --ink-soft: #34433a;
  --muted: #5f6c62;
  --green: #1f6b4a;
  --green-deep: #14523a;
  --green-light: #7fb98a;
  --line: #ded7c8;
  --line-strong: #cfc6b3;
  --shadow: 0 24px 60px rgba(31, 58, 42, 0.12);
  --radius: 22px;
  --radius-sm: 14px;
  --max: 1200px;
  --font-sans: "Segoe UI", "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --font-mono: "Cascadia Code", "JetBrains Mono", "Consolas", monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.nav-open {
  overflow: hidden;
}

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

a {
  color: var(--green);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

button {
  font: inherit;
}

::selection {
  background: var(--green);
  color: #fff;
}

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

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 200;
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--green);
  color: #fff;
  font-weight: 700;
}

.skip-link:focus {
  top: 16px;
}

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

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin: 0;
  color: var(--green);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 34px;
  height: 1px;
  background: currentColor;
  opacity: 0.55;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.94rem;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn svg {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}

.btn-primary {
  background: var(--green);
  color: #fff;
  box-shadow: 0 12px 26px rgba(31, 107, 74, 0.22);
}

.btn-primary:hover {
  background: var(--green-deep);
  color: #fff;
  box-shadow: 0 16px 34px rgba(31, 107, 74, 0.28);
}

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

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

.btn-light {
  background: var(--paper);
  color: var(--green);
}

.btn-light:hover {
  background: #fff;
  color: var(--green-deep);
}

.btn-small {
  min-height: 38px;
  padding: 0 16px;
  font-size: 0.84rem;
}

.btn-on-green {
  border-color: rgba(247, 243, 233, 0.32);
  background: transparent;
  color: var(--paper);
}

.btn-on-green:hover {
  border-color: var(--paper);
  background: rgba(247, 243, 233, 0.06);
  color: #fff;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(31, 107, 74, 0.1);
  background: rgba(247, 243, 233, 0.84);
  backdrop-filter: blur(18px);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 74px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
}

.brand:hover {
  color: var(--ink);
}

.brand img {
  width: 34px;
  height: 34px;
}

.brand strong {
  font-size: 1.08rem;
  font-weight: 900;
  letter-spacing: -0.04em;
}

.brand span {
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.18em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-gh {
  padding: 8px 4px;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 700;
}

.nav-gh:hover {
  color: var(--green);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}

.nav-toggle svg {
  width: 20px;
  height: 20px;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 88px 0 64px;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(31, 107, 74, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31, 107, 74, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at 66% 38%, #000 8%, transparent 68%);
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  width: 720px;
  height: 720px;
  right: -210px;
  top: -260px;
  border-radius: 50%;
  border: 1px solid rgba(31, 107, 74, 0.1);
  box-shadow: 0 0 0 80px rgba(31, 107, 74, 0.025), 0 0 0 160px rgba(31, 107, 74, 0.018);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(420px, 0.96fr);
  gap: 52px;
  align-items: center;
}

.hero-grid > *,
.chapter > *,
.video-grid > *,
.build-grid > * {
  min-width: 0;
}

.hero-copy {
  max-width: 670px;
}

.hero h1 {
  margin: 22px 0 0;
  font-size: clamp(3.3rem, 6.1vw, 5.75rem);
  font-weight: 900;
  letter-spacing: -0.055em;
  line-height: 1.04;
}

.hero h1 span {
  color: var(--green);
}

.hero-lead {
  max-width: 620px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.45vw, 1.2rem);
  line-height: 1.8;
}

.hero-lead strong {
  color: var(--ink);
  font-weight: 700;
}

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

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.hero-meta li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 13px;
  border: 1px solid rgba(31, 107, 74, 0.16);
  border-radius: 999px;
  background: rgba(255, 253, 248, 0.56);
  color: var(--green);
  font-size: 0.76rem;
  font-weight: 700;
}

.hero-meta li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green-light);
}

.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 620px;
}

.hero-visual::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 90px;
  width: 380px;
  height: 470px;
  border-radius: 34px;
  background: linear-gradient(155deg, rgba(47, 125, 88, 0.96), rgba(20, 82, 58, 0.96));
  transform: translateX(-50%) rotate(-4deg);
  box-shadow: 0 30px 70px rgba(31, 107, 74, 0.2);
}

.hero-phones {
  position: relative;
  width: 100%;
  height: 600px;
}

.phone-frame {
  padding: 9px;
  border-radius: 38px;
  background: linear-gradient(145deg, #303a33 0%, #101511 52%, #232e27 100%);
  box-shadow: 0 32px 64px rgba(23, 38, 29, 0.26), inset 0 0 0 1px rgba(255, 255, 255, 0.16);
}

.phone-frame .screen {
  height: 100%;
  overflow: hidden;
  border-radius: 30px;
  background: #fff;
}

.phone-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

.hero-phone {
  position: absolute;
  width: 258px;
  height: 538px;
}

.hero-phone.p-center {
  left: 50%;
  top: 0;
  z-index: 3;
  width: 274px;
  height: 570px;
  transform: translateX(-50%) rotate(0.5deg);
}

.hero-phone.p-left {
  left: 1%;
  top: 72px;
  transform: rotate(-8deg);
}

.hero-phone.p-right {
  right: 1%;
  top: 72px;
  transform: rotate(8deg);
}

.hero-strip {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px 32px;
  margin-top: 66px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.hero-strip span {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-strip span::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--green-light);
}

.section {
  padding: 96px 0;
  scroll-margin-top: 92px;
}

.section-alt {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.4), rgba(255, 255, 255, 0));
}

.section-head {
  max-width: 760px;
  margin-bottom: 44px;
}

.section-head.center {
  margin-right: auto;
  margin-left: auto;
  text-align: center;
}

.section-head.center .eyebrow {
  justify-content: center;
}

.section-head h2 {
  margin: 14px 0 0;
  font-size: clamp(2rem, 3.8vw, 3.2rem);
  font-weight: 900;
  letter-spacing: -0.045em;
  line-height: 1.12;
}

.section-head p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.8;
}

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

.feature-card {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.feature-card:hover {
  border-color: rgba(31, 107, 74, 0.28);
  box-shadow: var(--shadow);
  transform: translateY(-4px);
}

.feature-icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 13px;
  background: rgba(31, 107, 74, 0.09);
  color: var(--green);
}

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

.feature-card h3 {
  margin: 18px 0 0;
  font-size: 1.12rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.feature-card p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.93rem;
  line-height: 1.75;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 16px;
}

.tag {
  padding: 4px 9px;
  border-radius: 999px;
  background: rgba(31, 107, 74, 0.07);
  color: var(--green);
  font-size: 0.71rem;
  font-weight: 700;
}

.showcase {
  overflow: hidden;
}

.chapter {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(350px, 0.7fr);
  gap: 64px;
  align-items: center;
  padding: 44px 0 72px;
  scroll-margin-top: 92px;
}

.chapter + .chapter {
  border-top: 1px solid var(--line);
}

.chapter.reverse {
  grid-template-columns: minmax(350px, 0.7fr) minmax(0, 1fr);
}

.chapter.reverse .chapter-copy {
  order: 2;
}

.chapter.reverse .chapter-visual {
  order: 1;
}

.chapter-copy {
  max-width: 560px;
}

.chapter-copy .label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.2em;
}

.chapter-copy .label b {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0;
}

.chapter-copy .label::after {
  content: "";
  width: 44px;
  height: 1px;
  background: currentColor;
  opacity: 0.4;
}

.chapter-copy h3 {
  margin: 18px 0 0;
  font-size: clamp(2rem, 3.4vw, 3rem);
  font-weight: 900;
  letter-spacing: -0.045em;
  line-height: 1.12;
}

.chapter-copy h3 span {
  color: var(--green);
}

.chapter-copy p {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.8;
}

.chapter-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.chapter-visual::before {
  content: "";
  position: absolute;
  top: 34px;
  width: 320px;
  height: 400px;
  border-radius: 28px;
  background: linear-gradient(160deg, rgba(47, 125, 88, 0.95), rgba(20, 82, 58, 0.95));
  transform: rotate(-4deg);
}

.chapter.reverse .chapter-visual::before {
  transform: rotate(4deg);
}

.chapter-visual .phone-frame {
  position: relative;
  z-index: 2;
  width: 280px;
  height: 560px;
}

.video-section {
  position: relative;
  overflow: hidden;
  padding: 88px 0;
  background: var(--green-deep);
  color: var(--paper);
  scroll-margin-top: 92px;
}

.video-section::before {
  content: "";
  position: absolute;
  width: 700px;
  height: 700px;
  right: -220px;
  top: -300px;
  border-radius: 50%;
  border: 1px solid rgba(247, 243, 233, 0.14);
  box-shadow: 0 0 0 80px rgba(247, 243, 233, 0.035), 0 0 0 160px rgba(247, 243, 233, 0.02);
}

.video-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
  gap: 48px;
  align-items: center;
}

.video-copy .eyebrow {
  color: var(--green-light);
}

.video-copy h2 {
  margin: 16px 0 0;
  color: var(--paper);
  font-size: clamp(2rem, 3.8vw, 3.2rem);
  font-weight: 900;
  letter-spacing: -0.045em;
  line-height: 1.12;
}

.video-copy p {
  margin: 18px 0 0;
  color: rgba(247, 243, 233, 0.68);
  font-size: 1rem;
  line-height: 1.8;
}

.video-copy .btn-light {
  margin-top: 24px;
}

.video-frame {
  position: relative;
  padding: 8px;
  border: 1px solid rgba(247, 243, 233, 0.16);
  border-radius: 24px;
  background: rgba(247, 243, 233, 0.08);
  box-shadow: 0 40px 90px rgba(0, 0, 0, 0.28);
}

.video-frame video {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 18px;
  background: #0d1a14;
}

.video-play {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 76px;
  height: 76px;
  margin: auto;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--paper);
  color: var(--green);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.3);
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.video-play:hover {
  background: #fff;
  transform: scale(1.06);
}

.video-play svg {
  width: 30px;
  height: 30px;
  margin-left: 4px;
}

.video-play[hidden] {
  display: none;
}

.video-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 14px;
  color: rgba(247, 243, 233, 0.56);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.build-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
  gap: 48px;
  align-items: center;
}

.tech-list {
  display: grid;
  gap: 0;
  margin-top: 26px;
}

.tech-item {
  display: flex;
  gap: 14px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.tech-item:first-child {
  border-top: 1px solid var(--line);
}

.tech-item svg {
  width: 20px;
  height: 20px;
  margin-top: 3px;
  color: var(--green);
  flex: 0 0 auto;
}

.tech-item strong {
  display: block;
  font-size: 0.94rem;
  font-weight: 800;
}

.tech-item span {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.55;
}

.code-card {
  overflow: hidden;
  min-width: 0;
  border-radius: 20px;
  background: #122019;
  box-shadow: var(--shadow);
}

.code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 14px;
  background: #0d1812;
  color: #8ea99a;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.code-dots {
  display: flex;
  gap: 6px;
}

.code-dots i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #ff5f57;
}

.code-dots i:nth-child(2) {
  background: #febc2e;
}

.code-dots i:nth-child(3) {
  background: #28c840;
}

.copy-btn {
  padding: 5px 10px;
  border: 1px solid rgba(247, 243, 233, 0.16);
  border-radius: 999px;
  background: transparent;
  color: #b9cdbf;
  font-size: 0.7rem;
  font-weight: 700;
  cursor: pointer;
}

.copy-btn:hover {
  border-color: var(--green-light);
  color: #fff;
}

.copy-btn:disabled {
  opacity: 0.7;
  cursor: default;
}

.code-body {
  margin: 0;
  padding: 22px;
  overflow-x: auto;
  color: #dce7de;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.85;
  tab-size: 2;
}

.code-body .cmd {
  color: #9fd8ad;
}

.code-body .comment {
  color: #6f8878;
}

.download-section {
  padding: 96px 0 110px;
  scroll-margin-top: 92px;
}

.download-card {
  position: relative;
  overflow: hidden;
  padding: 64px;
  border-radius: 32px;
  background: linear-gradient(135deg, #1f6b4a, #14523a);
  color: var(--paper);
  text-align: center;
  box-shadow: 0 36px 80px rgba(31, 107, 74, 0.24);
}

.download-card::before {
  content: "";
  position: absolute;
  width: 560px;
  height: 560px;
  left: 50%;
  top: -360px;
  border-radius: 50%;
  border: 1px solid rgba(247, 243, 233, 0.14);
  transform: translateX(-50%);
  box-shadow: 0 0 0 70px rgba(247, 243, 233, 0.035), 0 0 0 140px rgba(247, 243, 233, 0.02);
}

.download-card > * {
  position: relative;
}

.download-card .eyebrow {
  justify-content: center;
  color: var(--green-light);
}

.download-card h2 {
  margin: 16px 0 0;
  color: var(--paper);
  font-size: clamp(2.2rem, 4.4vw, 3.6rem);
  font-weight: 900;
  letter-spacing: -0.05em;
  line-height: 1.1;
}

.download-card p {
  max-width: 620px;
  margin: 16px auto 0;
  color: rgba(247, 243, 233, 0.7);
  font-size: 1rem;
  line-height: 1.8;
}

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

.download-card .btn-light {
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.16);
}

.download-meta {
  margin-top: 20px;
  color: rgba(247, 243, 233, 0.48);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.site-footer {
  padding: 40px 0;
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

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

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

.footer-brand span {
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
}

.footer-links a {
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 600;
}

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

.footer-meta {
  color: var(--muted);
  font-size: 0.76rem;
}

html.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

html.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (max-width: 1040px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .hero-copy {
    max-width: 760px;
  }

  .hero-visual {
    min-height: 540px;
  }

  .hero-phones {
    height: 540px;
  }

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

  .chapter,
  .chapter.reverse,
  .video-grid,
  .build-grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .chapter.reverse .chapter-copy,
  .chapter.reverse .chapter-visual {
    order: initial;
  }

  .video-copy,
  .build-copy {
    max-width: 720px;
  }
}

@media (max-width: 760px) {
  .container {
    width: calc(100% - 32px);
  }

  .nav-inner {
    height: 68px;
  }

  .nav-links {
    position: fixed;
    top: 68px;
    right: 0;
    left: 0;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    padding: 16px 16px 24px;
    border-bottom: 1px solid var(--line);
    background: var(--paper);
    box-shadow: 0 24px 40px rgba(31, 58, 42, 0.08);
  }

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

  .nav-links a {
    width: 100%;
    padding: 12px 8px;
    font-size: 1rem;
  }

  .nav-actions .nav-gh {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .hero {
    padding: 56px 0 44px;
  }

  .hero h1 {
    font-size: clamp(2.8rem, 12vw, 4.2rem);
  }

  .hero-visual {
    min-height: 440px;
  }

  .hero-phones {
    height: 440px;
  }

  .hero-visual::before {
    top: 60px;
    width: 300px;
    height: 380px;
    border-radius: 28px;
  }

  .hero-phone {
    width: 190px;
    height: 394px;
    padding: 7px;
    border-radius: 30px;
  }

  .hero-phone .screen {
    border-radius: 24px;
  }

  .hero-phone.p-center {
    width: 208px;
    height: 420px;
  }

  .hero-phone.p-left {
    left: -4%;
    top: 60px;
    opacity: 0.72;
  }

  .hero-phone.p-right {
    right: -4%;
    top: 60px;
    opacity: 0.72;
  }

  .hero-strip {
    justify-content: flex-start;
    gap: 12px 20px;
    margin-top: 44px;
  }

  .section {
    padding: 68px 0;
  }

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

  .chapter {
    padding: 30px 0 48px;
  }

  .chapter-visual .phone-frame {
    width: 240px;
    height: 480px;
  }

  .chapter-visual::before {
    width: 270px;
    height: 340px;
  }

  .video-section {
    padding: 64px 0;
  }

  .download-section {
    padding: 68px 0 80px;
  }

  .download-card {
    padding: 44px 24px;
    border-radius: 24px;
  }

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

@media (max-width: 520px) {
  .brand span {
    display: none;
  }

  .hero-phone.p-left,
  .hero-phone.p-right {
    display: none;
  }

  .hero-visual {
    min-height: 450px;
  }

  .hero-phone.p-center {
    width: 220px;
    height: 446px;
  }

  .chapter-visual .phone-frame {
    width: 220px;
    height: 440px;
  }

  .chapter-visual::before {
    width: 240px;
    height: 300px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html.js .reveal {
    opacity: 1;
    transform: none;
  }
}