:root {
  --ink: #102f33;
  --ink-soft: #476468;
  --night: #061f21;
  --night-soft: #0b3434;
  --paper: #f7f2e6;
  --paper-deep: #e9dfc7;
  --line: rgba(16, 47, 51, 0.15);
  --gold: #e9b958;
  --gold-deep: #bd7f23;
  --coral: #d95b43;
  --jade: #79a79b;
  --white: #fffdf7;
  --shadow: 0 28px 90px rgba(1, 22, 23, 0.22);
  --radius-xl: 36px;
  --radius-lg: 26px;
  --radius-md: 18px;
  --page: min(1180px, calc(100vw - 40px));
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", "Noto Sans CJK SC", "Noto Sans JP", "Noto Sans KR", sans-serif;
  --serif: "Iowan Old Style", "Noto Serif", "Noto Serif CJK SC", "Songti SC", "Yu Mincho", Georgia, serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  content: "";
  background:
    radial-gradient(circle at 10% 5%, rgba(233, 185, 88, 0.1), transparent 34%),
    linear-gradient(180deg, var(--night), #0b302f 55%, var(--paper) 55%);
}

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

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

button,
summary,
select {
  font: inherit;
}

:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 10px 16px;
  color: var(--night);
  background: var(--white);
  border-radius: 10px;
  transform: translateY(-140%);
  transition: transform 0.2s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: 88px;
  color: var(--white);
  border-bottom: 1px solid transparent;
  transition: background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.site-header.is-scrolled,
.site-header.is-open {
  background: rgba(5, 30, 31, 0.92);
  border-color: rgba(255, 255, 255, 0.09);
  box-shadow: 0 14px 50px rgba(0, 12, 13, 0.28);
  backdrop-filter: blur(18px);
}

.nav-shell {
  width: var(--page);
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-right: auto;
  min-width: 0;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand img {
  width: 48px;
  height: 48px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 13px;
  box-shadow: 0 9px 24px rgba(0, 0, 0, 0.26);
}

.brand-name {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 0.88rem;
  font-weight: 720;
  letter-spacing: 0.04em;
}

.main-nav a {
  color: rgba(255, 253, 247, 0.76);
  transition: color 0.2s ease;
}

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

.language-switcher {
  position: relative;
  color: var(--white);
  font-size: 0.82rem;
  font-weight: 750;
}

.language-switcher summary {
  display: flex;
  align-items: center;
  min-width: 126px;
  height: 42px;
  padding: 0 12px;
  background: rgba(255, 255, 255, 0.09);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 999px;
  cursor: pointer;
  list-style: none;
}

.language-switcher summary::-webkit-details-marker {
  display: none;
}

.language-switcher summary::after {
  margin-left: auto;
  padding-left: 10px;
  content: "⌄";
  color: rgba(255, 253, 247, 0.72);
  font-size: 0.86rem;
}

.language-icon {
  flex: 0 0 auto;
  margin-right: 7px;
  color: var(--gold);
}

.language-menu {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  z-index: 100;
  min-width: 190px;
  padding: 8px;
  color: var(--ink);
  background: var(--white);
  border: 1px solid rgba(16, 47, 51, 0.12);
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.language-menu a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-radius: 10px;
  font-size: 0.88rem;
  font-weight: 700;
}

.language-menu a:hover,
.language-menu a:focus-visible,
.language-menu a[aria-current="page"] {
  background: #eee7d8;
}

.language-menu a[aria-current="page"]::after {
  content: "●";
  color: var(--coral);
  font-size: 0.58rem;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  color: var(--white);
  background: rgba(255, 255, 255, 0.09);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 13px;
  cursor: pointer;
}

.menu-toggle span,
.menu-toggle::before,
.menu-toggle::after {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  content: "";
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-header.is-open .menu-toggle span {
  opacity: 0;
}

.site-header.is-open .menu-toggle::before {
  transform: translateY(7px) rotate(45deg);
}

.site-header.is-open .menu-toggle::after {
  transform: translateY(-7px) rotate(-45deg);
}

.hero {
  position: relative;
  min-height: 790px;
  overflow: hidden;
  color: var(--white);
  background:
    radial-gradient(circle at 72% 50%, rgba(33, 112, 103, 0.28), transparent 34%),
    linear-gradient(145deg, #061d1f, #0a3231 62%, #0a2427);
}

.hero::before,
.hero::after {
  position: absolute;
  content: "";
  pointer-events: none;
}

.hero::before {
  inset: 0;
  opacity: 0.3;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(to bottom, black, transparent 94%);
}

.hero::after {
  left: 50%;
  bottom: -340px;
  width: 900px;
  height: 600px;
  background: rgba(233, 185, 88, 0.11);
  border-radius: 50%;
  filter: blur(80px);
  transform: translateX(-50%);
}

.hero-shell {
  position: relative;
  z-index: 2;
  width: var(--page);
  min-height: 790px;
  margin: 0 auto;
  padding: 154px 0 104px;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(440px, 1.1fr);
  align-items: center;
  gap: clamp(48px, 7vw, 92px);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 20px;
  color: var(--gold);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 34px;
  height: 2px;
  content: "";
  background: currentColor;
}

.hero h1 {
  max-width: none;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.8rem, 5.45vw, 4.9rem);
  font-weight: 760;
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.hero h1 > span,
.hero h1 em {
  display: block;
  white-space: nowrap;
}

.hero h1 em {
  color: var(--gold);
  font-style: normal;
}

html[lang="zh-Hans"] .hero h1,
html[lang="zh-Hant"] .hero h1 {
  font-size: clamp(3.25rem, 6.4vw, 5.4rem);
  letter-spacing: -0.07em;
}

html[lang="ja"] .hero h1,
html[lang="ko"] .hero h1 {
  font-size: clamp(3rem, 6vw, 5.1rem);
}

.hero-lead {
  max-width: 630px;
  margin: 28px 0 0;
  color: rgba(255, 253, 247, 0.76);
  font-size: clamp(1.05rem, 1.8vw, 1.26rem);
  line-height: 1.7;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 820;
  letter-spacing: 0.015em;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.button::after {
  content: "→";
  font-size: 1.12em;
}

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

.button-primary {
  color: var(--night);
  background: var(--gold);
  box-shadow: 0 14px 30px rgba(189, 127, 35, 0.2);
}

.button-primary:hover {
  background: #f5c96f;
}

.button-ghost {
  color: var(--white);
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.2);
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 28px;
}

.hero-badges span {
  padding: 6px 11px;
  color: rgba(255, 253, 247, 0.72);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 720;
}

.hero-art {
  position: relative;
  width: 100%;
  min-width: 0;
  padding: 28px 0 62px;
}

.hero-panorama {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: #082829;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-xl);
  box-shadow: 0 40px 100px rgba(0, 0, 0, 0.46);
}

.hero-panorama img {
  width: 100%;
  height: auto;
  aspect-ratio: 1024 / 500;
  object-fit: contain;
}

.hero-icon {
  position: absolute;
  left: -18px;
  bottom: 8px;
  width: 104px;
  height: 104px;
  object-fit: cover;
  border: 2px solid rgba(255, 255, 255, 0.22);
  border-radius: 25px;
  box-shadow: 0 24px 56px rgba(0, 0, 0, 0.44);
}

.section {
  position: relative;
  padding: clamp(84px, 10vw, 132px) 0;
}

.section-shell {
  width: var(--page);
  margin: 0 auto;
}

.section-kicker {
  margin: 0 0 14px;
  color: var(--coral);
  font-size: 0.76rem;
  font-weight: 880;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.section-title {
  max-width: 820px;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.5rem, 5vw, 4.6rem);
  font-weight: 740;
  line-height: 1.04;
  letter-spacing: -0.045em;
}

.section-lead {
  max-width: 710px;
  margin: 22px 0 0;
  color: var(--ink-soft);
  font-size: 1.08rem;
}

.story {
  background: var(--paper);
}

.story-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 52px;
}

.story-card {
  position: relative;
  min-height: 300px;
  padding: 32px;
  overflow: hidden;
  background: rgba(255, 253, 247, 0.74);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.story-card::after {
  position: absolute;
  right: -28px;
  bottom: -42px;
  width: 150px;
  height: 150px;
  content: "";
  background: var(--card-color, var(--jade));
  border-radius: 42px;
  opacity: 0.13;
  transform: rotate(28deg);
}

.story-card:nth-child(2) {
  --card-color: var(--gold);
}

.story-card:nth-child(3) {
  --card-color: var(--coral);
}

.story-number {
  display: grid;
  width: 52px;
  height: 52px;
  place-items: center;
  color: var(--white);
  background: var(--ink);
  border-radius: 15px;
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 800;
}

.story-card h3 {
  margin: 72px 0 10px;
  font-size: 1.28rem;
  line-height: 1.25;
}

.story-card p {
  margin: 0;
  color: var(--ink-soft);
}

.terrain {
  color: var(--white);
  background: var(--night);
  overflow: hidden;
}

.terrain::before {
  position: absolute;
  inset: 0;
  content: "";
  opacity: 0.18;
  background: url("hero-board.webp") center / cover;
  filter: saturate(0.75);
}

.terrain::after {
  position: absolute;
  inset: 0;
  content: "";
  background: linear-gradient(90deg, rgba(3, 24, 25, 0.99) 4%, rgba(3, 24, 25, 0.84) 54%, rgba(3, 24, 25, 0.7));
}

.terrain .section-shell {
  position: relative;
  z-index: 2;
}

.terrain .section-kicker {
  color: var(--gold);
}

.terrain .section-lead {
  color: rgba(255, 253, 247, 0.7);
}

.terrain-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(420px, 1.12fr);
  gap: 70px;
  align-items: end;
}

.terrain-list {
  display: grid;
  gap: 12px;
  margin-top: 40px;
}

.terrain-item {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 18px;
  align-items: center;
  padding: 17px 18px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 18px;
  backdrop-filter: blur(10px);
}

.terrain-mark {
  display: grid;
  width: 58px;
  height: 58px;
  place-items: center;
  color: var(--night);
  background: var(--gold);
  border-radius: 16px;
  font-family: var(--serif);
  font-size: 1.55rem;
  font-weight: 900;
}

.terrain-item:nth-child(2) .terrain-mark {
  color: var(--white);
  background: #2b8d91;
}

.terrain-item:nth-child(3) .terrain-mark {
  color: var(--white);
  background: var(--coral);
}

.terrain-item h3,
.terrain-item p {
  margin: 0;
}

.terrain-item h3 {
  font-size: 1rem;
}

.terrain-item p {
  color: rgba(255, 253, 247, 0.64);
  font-size: 0.9rem;
}

.terrain-visual {
  position: relative;
  min-height: 620px;
}

.terrain-visual img {
  position: absolute;
  right: 4%;
  bottom: -190px;
  box-sizing: content-box;
  width: min(410px, 37vw);
  height: auto;
  aspect-ratio: 620 / 1380;
  object-fit: contain;
  border: 10px solid #0c2223;
  border-radius: 54px;
  box-shadow: 0 40px 100px rgba(0, 0, 0, 0.52);
  transform: rotate(4deg);
}

.chapters {
  background: #e8dfcb;
}

.chapter-list {
  margin-top: 56px;
  border-top: 1px solid rgba(16, 47, 51, 0.19);
}

.chapter-row {
  display: grid;
  grid-template-columns: 82px minmax(220px, 0.7fr) minmax(320px, 1.3fr);
  gap: 28px;
  align-items: center;
  min-height: 138px;
  padding: 22px 0;
  border-bottom: 1px solid rgba(16, 47, 51, 0.19);
}

.chapter-index {
  display: grid;
  width: 58px;
  height: 58px;
  place-items: center;
  color: var(--white);
  background: var(--ink);
  border-radius: 17px;
  font-family: var(--serif);
  font-size: 1.4rem;
  font-weight: 800;
}

.chapter-row:nth-child(2) .chapter-index,
.chapter-row:nth-child(5) .chapter-index {
  color: var(--ink);
  background: var(--gold);
}

.chapter-row:nth-child(3) .chapter-index {
  background: var(--coral);
}

.chapter-row:nth-child(4) .chapter-index {
  background: var(--jade);
}

.chapter-row h3,
.chapter-row p {
  margin: 0;
}

.chapter-row h3 {
  font-family: var(--serif);
  font-size: 1.55rem;
  letter-spacing: -0.025em;
}

.chapter-row p {
  color: var(--ink-soft);
}

.screens {
  overflow: hidden;
  background: var(--paper);
}

.screens-heading {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  align-items: end;
}

.swipe-hint {
  display: none;
  color: var(--ink-soft);
  font-size: 0.8rem;
  font-weight: 700;
}

.screens-track {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin-top: 52px;
}

.screen-card {
  margin: 0;
}

.screen-frame {
  padding: 7px;
  overflow: hidden;
  background: #0b2527;
  border: 1px solid rgba(16, 47, 51, 0.16);
  border-radius: clamp(24px, 3vw, 42px);
  box-shadow: 0 20px 50px rgba(16, 47, 51, 0.14);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.screen-card:hover .screen-frame {
  box-shadow: 0 28px 70px rgba(16, 47, 51, 0.22);
  transform: translateY(-7px);
}

.screen-frame img {
  width: 100%;
  height: auto;
  aspect-ratio: 620 / 1380;
  object-fit: contain;
  border-radius: calc(clamp(24px, 3vw, 42px) - 8px);
}

.screen-card figcaption {
  margin-top: 15px;
  color: var(--ink-soft);
  font-size: 0.86rem;
  font-weight: 700;
  text-align: center;
}

.proof {
  color: var(--white);
  background: linear-gradient(145deg, #0a3132, #071e20);
}

.proof-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(360px, 0.9fr);
  gap: 62px;
  align-items: center;
}

.proof .section-kicker {
  color: var(--gold);
}

.proof .section-lead {
  color: rgba(255, 253, 247, 0.7);
}

.proof-points {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.proof-point {
  min-height: 168px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 22px;
}

.proof-point strong {
  display: block;
  margin-bottom: 8px;
  color: var(--gold);
  font-family: var(--serif);
  font-size: 1.4rem;
}

.proof-point span {
  color: rgba(255, 253, 247, 0.64);
  font-size: 0.9rem;
}

.support {
  background: var(--paper);
}

.support-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(420px, 1.18fr);
  gap: 72px;
  align-items: start;
}

.contact-card {
  margin-top: 36px;
  padding: 28px;
  color: var(--white);
  background: var(--ink);
  border-radius: 24px;
  box-shadow: 0 20px 50px rgba(16, 47, 51, 0.16);
}

.contact-card p {
  margin: 0 0 18px;
  color: rgba(255, 253, 247, 0.68);
}

.contact-card .button {
  color: var(--night);
  background: var(--gold);
}

.faq-list {
  border-top: 1px solid var(--line);
}

.faq-list details {
  border-bottom: 1px solid var(--line);
}

.faq-list summary {
  position: relative;
  padding: 24px 50px 24px 0;
  cursor: pointer;
  list-style: none;
  font-size: 1.02rem;
  font-weight: 800;
}

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

.faq-list summary::after {
  position: absolute;
  top: 50%;
  right: 4px;
  width: 30px;
  height: 30px;
  content: "+";
  color: var(--coral);
  border: 1px solid var(--line);
  border-radius: 50%;
  line-height: 27px;
  text-align: center;
  transform: translateY(-50%);
}

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

.faq-answer {
  max-width: 700px;
  padding: 0 48px 24px 0;
  color: var(--ink-soft);
}

.faq-answer p {
  margin: 0;
}

.final-cta {
  padding: 0 0 clamp(84px, 10vw, 130px);
  background: var(--paper);
}

.final-card {
  position: relative;
  width: var(--page);
  min-height: 330px;
  margin: 0 auto;
  padding: clamp(38px, 7vw, 78px);
  overflow: hidden;
  color: var(--white);
  background: var(--night);
  border-radius: var(--radius-xl);
}

.final-card::before {
  position: absolute;
  inset: 0;
  content: "";
  opacity: 0.24;
  background: url("hero-board.webp") center right / cover;
}

.final-card::after {
  position: absolute;
  inset: 0;
  content: "";
  background: linear-gradient(90deg, rgba(4, 27, 28, 0.99) 0%, rgba(4, 27, 28, 0.9) 48%, rgba(4, 27, 28, 0.35));
}

.final-copy {
  position: relative;
  z-index: 2;
  max-width: 650px;
}

.final-copy h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.5rem, 5vw, 4.4rem);
  line-height: 1;
  letter-spacing: -0.045em;
}

.final-copy p {
  margin: 20px 0 0;
  color: rgba(255, 253, 247, 0.7);
}

.site-footer {
  padding: 48px 0;
  color: rgba(255, 253, 247, 0.62);
  background: #041718;
  font-size: 0.84rem;
}

.footer-shell {
  width: var(--page);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px;
  align-items: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.footer-brand img {
  width: 48px;
  height: 48px;
  border-radius: 13px;
}

.footer-brand strong {
  display: block;
  color: var(--white);
  font-size: 0.95rem;
}

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

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

.legal-line {
  width: var(--page);
  margin: 30px auto 0;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.not-found {
  min-height: 100vh;
  padding: 48px 20px;
  display: grid;
  place-items: center;
  color: var(--white);
  background: var(--night);
  text-align: center;
}

.not-found-card {
  width: min(620px, 100%);
  padding: clamp(34px, 8vw, 70px);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-xl);
}

.not-found img {
  width: 104px;
  margin: 0 auto 28px;
  border-radius: 24px;
}

.not-found h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.8rem, 9vw, 5.3rem);
  font-weight: 750;
  line-height: 1;
  letter-spacing: -0.055em;
}

.not-found p {
  margin: 22px 0 30px;
  color: rgba(255, 253, 247, 0.7);
}

@media (max-width: 980px) {
  :root {
    --page: min(100% - 32px, 760px);
  }

  .site-header {
    height: 76px;
  }

  .menu-toggle {
    display: block;
  }

  .main-nav {
    position: fixed;
    top: 76px;
    right: 16px;
    left: 16px;
    display: none;
    padding: 16px;
    background: #09292a;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 18px;
    box-shadow: var(--shadow);
  }

  .site-header.is-open .main-nav {
    display: grid;
    gap: 4px;
  }

  .main-nav a {
    padding: 10px 12px;
    border-radius: 10px;
  }

  .main-nav a:hover {
    background: rgba(255, 255, 255, 0.07);
  }

  .hero-shell {
    min-height: auto;
    padding: 134px 0 100px;
    grid-template-columns: 1fr;
  }

  .hero-copy {
    max-width: 720px;
  }

  .hero-art {
    max-width: 670px;
    padding-top: 0;
  }

  .hero-panorama {
    width: 100%;
  }

  .hero-icon {
    left: 24px;
  }

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

  .story-card {
    min-height: 220px;
  }

  .story-card h3 {
    margin-top: 42px;
  }

  .terrain-layout,
  .support-layout,
  .proof-grid {
    grid-template-columns: 1fr;
  }

  .terrain-visual {
    min-height: 560px;
  }

  .terrain-visual img {
    right: 50%;
    bottom: -240px;
    width: min(380px, 72vw);
    transform: translateX(50%) rotate(3deg);
  }

  .screens-track {
    grid-template-columns: repeat(2, 1fr);
    gap: 30px 18px;
  }
}

@media (max-width: 680px) {
  :root {
    --page: calc(100vw - 28px);
    --radius-xl: 27px;
  }

  body {
    font-size: 16px;
  }

  .nav-shell {
    gap: 10px;
  }

  .brand img {
    width: 42px;
    height: 42px;
  }

  .brand-name {
    max-width: 130px;
  }

  .language-switcher summary {
    min-width: 108px;
    height: 42px;
    padding: 0 10px;
  }

  .hero {
    min-height: 0;
  }

  .hero-shell {
    padding: 116px 0 82px;
    gap: 36px;
  }

  .hero h1 {
    font-size: clamp(2.25rem, 10.5vw, 3rem);
  }

  html[lang="zh-Hans"] .hero h1,
  html[lang="zh-Hant"] .hero h1,
  html[lang="ja"] .hero h1,
  html[lang="ko"] .hero h1 {
    font-size: clamp(2.85rem, 13.5vw, 3.55rem);
  }

  .hero-lead {
    margin-top: 22px;
  }

  .hero-actions {
    display: grid;
  }

  .button {
    width: 100%;
  }

  .hero-art {
    padding: 0 0 48px;
  }

  .hero-panorama {
    border-radius: 24px;
  }

  .hero-icon {
    bottom: 4px;
    left: 18px;
    width: 80px;
    height: 80px;
    border-radius: 19px;
  }

  .story-card {
    padding: 26px;
  }

  .terrain-layout {
    gap: 38px;
  }

  .terrain-item {
    grid-template-columns: 48px 1fr;
    padding: 14px;
  }

  .terrain-mark {
    width: 48px;
    height: 48px;
    border-radius: 13px;
    font-size: 1.25rem;
  }

  .terrain-visual {
    min-height: 470px;
  }

  .chapter-row {
    grid-template-columns: 58px 1fr;
    gap: 14px;
    min-height: 0;
    padding: 26px 0;
  }

  .chapter-row p {
    grid-column: 2;
  }

  .chapter-index {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    font-size: 1.15rem;
  }

  .chapter-row h3 {
    font-size: 1.28rem;
  }

  .screens-heading {
    display: block;
  }

  .swipe-hint {
    display: block;
    margin-top: 14px;
  }

  .screens-track {
    width: 100vw;
    margin-left: calc((100vw - var(--page)) / -2);
    padding: 0 14px 20px;
    display: flex;
    gap: 14px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
  }

  .screens-track::-webkit-scrollbar {
    display: none;
  }

  .screen-card {
    flex: 0 0 min(78vw, 310px);
    scroll-snap-align: center;
  }

  .proof-points {
    grid-template-columns: 1fr;
  }

  .proof-point {
    min-height: 0;
  }

  .support-layout {
    gap: 54px;
  }

  .faq-list summary {
    padding-right: 42px;
  }

  .final-card {
    min-height: 360px;
  }

  .final-card::after {
    background: linear-gradient(90deg, rgba(4, 27, 28, 0.98), rgba(4, 27, 28, 0.78));
  }

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

  .footer-links {
    justify-content: flex-start;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media print {
  .site-header,
  .hero-art,
  .button,
  .final-cta {
    display: none !important;
  }

  body,
  .hero,
  .terrain,
  .proof {
    color: #111;
    background: #fff;
  }

  .hero-shell {
    min-height: 0;
    padding: 40px 0;
    display: block;
  }
}