:root {
  color-scheme: light dark;
  --bg: #f7f5f0;
  --surface: #fffefa;
  --surface-strong: #eeeae1;
  --ink: #172033;
  --muted: #626b7d;
  --line: rgba(23, 32, 51, 0.13);
  --line-strong: rgba(23, 32, 51, 0.24);
  --accent: #f2612d;
  --accent-hover: #dd4e1b;
  --accent-soft: #fbe5dc;
  --accent-ink: #c34416;
  --accent-contrast: #172033;
  --action: #172033;
  --action-hover: #293550;
  --action-contrast: #f7f5f0;
  --success: #176943;
  --error: #ae2d24;
  --shadow: 0 22px 56px rgba(23, 32, 51, 0.12);
  --shadow-soft: 0 10px 28px rgba(23, 32, 51, 0.08);
  --radius: 14px;
  --font-sans: Manrope, "Avenir Next", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101625;
    --surface: #172033;
    --surface-strong: #222c42;
    --ink: #f7f5f0;
    --muted: #b9becc;
    --line: rgba(247, 245, 240, 0.13);
    --line-strong: rgba(247, 245, 240, 0.25);
    --accent: #f2612d;
    --accent-hover: #ff7b4d;
    --accent-soft: #3b241f;
    --accent-ink: #ff8257;
    --accent-contrast: #172033;
    --action: #f7f5f0;
    --action-hover: #fffefa;
    --action-contrast: #172033;
    --success: #72d4a4;
    --error: #ff9891;
    --shadow: 0 22px 56px rgba(2, 6, 10, 0.34);
    --shadow-soft: 0 10px 28px rgba(2, 6, 10, 0.24);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: clip;
}

body {
  margin: 0;
  overflow-x: clip;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

button,
input,
textarea,
select {
  font: inherit;
}

button,
select {
  cursor: pointer;
}

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 72%, transparent);
  outline-offset: 3px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

section {
  scroll-margin-top: 88px;
}

.site-shell {
  width: min(1320px, 100%);
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 52px);
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 24px;
  min-height: 70px;
  padding: 8px 0;
  border-bottom: 1px solid transparent;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: border-color 150ms ease, background 150ms ease;
}

.site-header.is-scrolled,
.site-header.is-open {
  border-bottom-color: var(--line);
  background: color-mix(in srgb, var(--surface) 96%, transparent);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: max-content;
}

.brand picture {
  display: block;
  flex: 0 0 auto;
}

.brand img {
  width: 46px;
  height: 46px;
}

.brand-name {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  color: var(--ink);
  font-size: 1.03rem;
  font-weight: 780;
  letter-spacing: -0.035em;
  line-height: 1;
}

.brand-name b {
  font-size: 1.05em;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-name i {
  color: var(--accent);
  font-style: normal;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(14px, 2vw, 28px);
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 620;
  white-space: nowrap;
}

.site-nav a {
  padding: 7px 0;
  border-bottom: 2px solid transparent;
  transition: color 140ms ease, border-color 140ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

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

.header-phone {
  display: inline-flex;
  align-items: center;
  color: var(--ink);
  font-size: 0.88rem;
  font-weight: 700;
  white-space: nowrap;
}

.language-select {
  display: inline-flex;
  align-items: center;
  height: 42px;
  padding: 0 7px 0 10px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
}

.language-select select {
  max-width: 86px;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--ink);
  font-size: 0.86rem;
  font-weight: 620;
}

.nav-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  transition: background 150ms ease, border-color 150ms ease, color 150ms ease, transform 100ms ease;
}

.nav-cta,
.button-primary {
  background: var(--action);
  color: var(--action-contrast);
}

.nav-cta:hover,
.nav-cta:focus-visible,
.button-primary:hover,
.button-primary:focus-visible {
  background: var(--action-hover);
}

.button-secondary {
  border-color: var(--line-strong);
  background: var(--surface);
  color: var(--ink);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  border-color: var(--ink);
}

.nav-cta:active,
.button:active {
  transform: translateY(1px);
}

.button:disabled {
  cursor: wait;
  opacity: 0.65;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-ink);
  font-weight: 700;
}

.text-link::after {
  content: "→";
}

.text-link:hover,
.text-link:focus-visible {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
}

.menu-button span {
  display: block;
  width: 17px;
  height: 2px;
  margin: 4px auto;
  border-radius: 2px;
  background: currentColor;
  transition: transform 140ms ease;
}

.site-header.is-open .menu-button span:first-child {
  transform: translateY(3px) rotate(45deg);
}

.site-header.is-open .menu-button span:last-child {
  transform: translateY(-3px) rotate(-45deg);
}

/* ---------- Shared section furniture ---------- */

.section {
  padding: clamp(66px, 7.5vw, 104px) 0;
  border-top: 1px solid var(--line);
}

.section-head {
  max-width: 820px;
  margin-bottom: clamp(32px, 4.5vw, 52px);
}

h2 {
  margin: 0;
  font-size: clamp(1.85rem, 2.9vw, 2.85rem);
  font-weight: 740;
  line-height: 1.1;
  letter-spacing: -0.035em;
  text-wrap: balance;
}

h3 {
  text-wrap: balance;
}

.section-head > p,
.pilot-lead > p,
.contact-copy > p {
  max-width: 62ch;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.2vw, 1.08rem);
}

.kicker,
.plain-label {
  margin: 0 0 14px;
  color: var(--accent-ink);
  font-size: 0.84rem;
  font-weight: 720;
}

.kicker {
  display: inline-block;
  padding-bottom: 6px;
  border-bottom: 2px solid var(--accent);
}

/* ---------- Product frame ---------- */

.product-frame {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.product-frame img {
  width: 100%;
  height: auto;
  border-bottom: 1px solid var(--line);
  background: var(--surface-strong);
}

.product-frame figcaption {
  display: grid;
  gap: 4px;
  padding: 14px 17px 16px;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.product-frame figcaption strong {
  color: var(--ink);
  font-size: 0.98rem;
}

/* ---------- Hero ---------- */

.hero {
  isolation: isolate;
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
  align-items: center;
  gap: clamp(36px, 4.5vw, 68px);
  min-height: clamp(620px, calc(100dvh - 70px), 760px);
  padding: clamp(38px, 5vw, 64px) 0;
}

.hero-copy {
  position: relative;
  z-index: 1;
  min-width: 0;
  max-width: 580px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.7rem, 4.4vw, 4rem);
  font-weight: 760;
  line-height: 1.05;
  letter-spacing: -0.045em;
}

.hero h1 span {
  display: block;
}

.hero h1 span:last-child {
  color: var(--accent-ink);
}

.hero-lede {
  max-width: 33rem;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: clamp(1.02rem, 1.3vw, 1.16rem);
  line-height: 1.62;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.hero-note {
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.hero-visual {
  position: relative;
  z-index: 0;
  min-width: 0;
  box-shadow: var(--shadow);
}

/* ---------- Brand story ---------- */

.brand-story {
  display: grid;
  gap: clamp(34px, 4.5vw, 60px);
  padding: clamp(54px, 6.5vw, 88px) clamp(26px, 4vw, 58px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
}

.brand-story-intro {
  display: grid;
  grid-template-columns: minmax(150px, 0.45fr) minmax(0, 1.55fr);
  gap: clamp(32px, 5vw, 76px);
  align-items: center;
}

.story-mark {
  display: block;
  max-width: 230px;
}

.story-mark img {
  width: 100%;
  height: auto;
}

.brand-story h2 {
  max-width: 20ch;
}

.brand-story-intro p {
  max-width: 66ch;
  margin: 18px 0 0;
  color: var(--muted);
}

.run-outcomes {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  border-top: 1px solid var(--line);
}

.run-outcomes div {
  padding: 24px 22px 0;
  border-left: 1px solid var(--line);
}

.run-outcomes div:first-child {
  padding-left: 0;
  border-left: 0;
}

.run-outcomes dt {
  color: var(--accent-ink);
  font-size: 1.02rem;
  font-weight: 780;
}

.run-outcomes dd {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

/* ---------- Entry strip ---------- */

.entry-strip {
  padding: clamp(28px, 3.5vw, 44px) 0 clamp(34px, 4vw, 52px);
  margin-top: clamp(28px, 4vw, 52px);
}

.entry-strip h2 {
  font-size: clamp(1.15rem, 1.5vw, 1.35rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.entry-strip > p {
  max-width: 68ch;
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.entry-list {
  display: flex;
  gap: 0;
  margin: 26px 0 0;
  padding: 0;
  overflow-x: auto;
  list-style: none;
  border-top: 1px solid var(--line);
  scrollbar-width: thin;
}

.entry-list li {
  flex: 1 0 180px;
}

.entry-list a {
  display: grid;
  gap: 4px;
  height: 100%;
  padding: 18px 18px 20px;
  border-left: 1px solid var(--line);
  transition: background 140ms ease, color 140ms ease;
}

.entry-list li:first-child a {
  padding-left: 0;
  border-left: 0;
}

.entry-list a:hover,
.entry-list a:focus-visible {
  background: var(--accent-soft);
}

.entry-list strong {
  font-size: 0.98rem;
  font-weight: 720;
}

.entry-list span {
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.45;
}

/* ---------- Feature rows ---------- */

.feature-row {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  gap: clamp(32px, 4.5vw, 72px);
  align-items: center;
  padding: clamp(52px, 6vw, 84px) 0;
  border-top: 1px solid var(--line);
}

.feature-row:nth-of-type(even) {
  grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
}

.feature-row:nth-of-type(even) .feature-copy {
  order: 2;
}

.feature-copy h2 {
  margin: 0;
  font-size: clamp(1.5rem, 2.2vw, 2.05rem);
  font-weight: 730;
  line-height: 1.16;
  letter-spacing: -0.03em;
}

.feature-copy > p {
  max-width: 52ch;
  margin: 16px 0 0;
  color: var(--muted);
}

.feature-points {
  display: grid;
  gap: 11px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.feature-points li {
  position: relative;
  padding-left: 26px;
  line-height: 1.55;
}

.feature-points li::before {
  content: "";
  position: absolute;
  top: 0.62em;
  left: 4px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--accent);
}

.feature-copy .text-link {
  margin-top: 22px;
}

.feature-visual {
  min-width: 0;
}

.capability-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
  gap: 18px;
  padding: clamp(52px, 6vw, 84px) 0;
  border-top: 1px solid var(--line);
}

.capability-card,
.capability-card:nth-of-type(even) {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 26px;
  padding: clamp(24px, 3vw, 38px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.capability-card:nth-of-type(even) .feature-copy {
  order: 0;
}

.capability-card:nth-child(3) {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
  align-items: center;
}

.capability-card .feature-copy h2 {
  font-size: clamp(1.35rem, 1.9vw, 1.8rem);
}

.capability-card .feature-points {
  display: none;
}

/* ---------- Security ---------- */

.security-section {
  padding: clamp(44px, 5vw, 72px) clamp(26px, 3.5vw, 56px);
  margin: clamp(20px, 3vw, 40px) 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
}

.security-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}

.security-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 32px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.security-list li {
  padding-top: 18px;
  border-top: 1px solid var(--line-strong);
}

.security-list strong {
  display: block;
  font-size: 1.02rem;
  font-weight: 720;
}

.security-list span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.94rem;
}

/* ---------- Deployment cards ---------- */

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

.deploy-card {
  display: grid;
  align-content: start;
  gap: 10px;
  padding: clamp(22px, 2.6vw, 30px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
}

.deploy-card h3 {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 730;
}

.deploy-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.deploy-card ul {
  display: grid;
  gap: 7px;
  margin: 4px 0 0;
  padding-left: 1.1rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.deploy-card li::marker {
  color: var(--accent);
}

.deploy-card .text-link {
  margin-top: 8px;
}

/* ---------- Proof ---------- */

.proof-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.proof-card {
  padding: clamp(24px, 3vw, 34px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
}

.proof-card h3 {
  margin: 0;
  font-size: 1.14rem;
  font-weight: 730;
}

.proof-card ul {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.proof-card li {
  display: grid;
  grid-template-columns: minmax(96px, auto) minmax(0, 1fr);
  gap: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 0.94rem;
}

.proof-card li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.proof-card b {
  color: var(--accent-ink);
  font-weight: 700;
}

.proof-card span {
  color: var(--muted);
}

/* ---------- Pilot ---------- */

.pilot-section {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  gap: clamp(44px, 7vw, 100px);
}

.pilot-lead {
  align-self: start;
}

.pilot-lead .button {
  margin-top: 28px;
}

.pilot-details {
  min-width: 0;
}

.pilot-facts {
  margin: 0 0 30px;
  border-top: 1px solid var(--line-strong);
}

.pilot-facts div {
  display: grid;
  grid-template-columns: minmax(90px, 0.28fr) minmax(0, 1fr);
  gap: 24px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.pilot-facts dt {
  color: var(--accent-ink);
  font-weight: 720;
}

.pilot-facts dd {
  margin: 0;
  color: var(--ink);
  font-weight: 620;
}

.pilot-output {
  padding: clamp(24px, 3.5vw, 38px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
}

.pilot-output h3 {
  margin: 0;
  font-size: clamp(1.2rem, 1.8vw, 1.6rem);
}

.pilot-output ul {
  display: grid;
  gap: 12px;
  margin: 22px 0 0;
  padding-left: 1.2rem;
}

.pilot-output li::marker {
  color: var(--accent);
}

.pilot-output p {
  margin: 22px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

/* ---------- FAQ ---------- */

.faq-section {
  display: grid;
  grid-template-columns: minmax(220px, 0.6fr) minmax(0, 1.4fr);
  gap: clamp(40px, 7vw, 100px);
}

.faq-heading h2 {
  max-width: 10ch;
}

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

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

.faq-list summary {
  position: relative;
  padding: 21px 46px 21px 0;
  color: var(--ink);
  font-weight: 690;
  list-style: none;
  cursor: pointer;
}

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

.faq-list summary::after {
  content: "+";
  position: absolute;
  top: 16px;
  right: 4px;
  color: var(--accent-ink);
  font-size: 1.5rem;
  font-weight: 400;
}

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

.faq-list p {
  max-width: 64ch;
  margin: -2px 46px 22px 0;
  color: var(--muted);
}

/* ---------- Contact ---------- */

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
  gap: clamp(44px, 6vw, 84px);
  align-items: start;
  padding: clamp(66px, 7.5vw, 104px) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 88px;
}

.contact-domestic {
  display: grid;
  margin-top: 30px;
  border-top: 1px solid var(--line-strong);
}

.contact-domestic > a,
.wechat-card {
  display: grid;
  gap: 3px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.contact-domestic span {
  color: var(--muted);
  font-size: 0.78rem;
}

.contact-domestic strong {
  color: var(--ink);
  font-size: 0.95rem;
  overflow-wrap: anywhere;
}

.wechat-card {
  grid-template-columns: 1fr auto;
  align-items: center;
}

.wechat-card span,
.wechat-card strong {
  grid-column: 1;
}

.wechat-card img {
  grid-column: 2;
  grid-row: 1 / span 2;
  width: 78px;
  height: 78px;
  border-radius: calc(var(--radius) - 2px);
}

.inquiry-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  padding: clamp(24px, 3.5vw, 38px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.inquiry-form label {
  display: grid;
  gap: 7px;
}

.inquiry-form label:nth-of-type(4),
.inquiry-form .button,
.form-status {
  grid-column: 1 / -1;
}

.inquiry-form label > span {
  color: var(--ink);
  font-size: 0.88rem;
  font-weight: 660;
}

.inquiry-form input,
.inquiry-form textarea {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--ink);
}

.inquiry-form input {
  min-height: 46px;
  padding: 0 13px;
}

.inquiry-form textarea {
  min-height: 128px;
  padding: 12px 13px;
  resize: vertical;
}

.inquiry-form input:focus,
.inquiry-form textarea:focus {
  border-color: var(--accent);
  outline: 3px solid color-mix(in srgb, var(--accent) 20%, transparent);
}

.inquiry-form textarea::placeholder {
  color: var(--muted);
  opacity: 1;
}

.form-status {
  min-height: 1.5em;
  margin: -4px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.form-status.is-success {
  color: var(--success);
}

.form-status.is-error {
  color: var(--error);
}

/* ---------- Footer ---------- */

.site-footer {
  padding: clamp(44px, 5vw, 64px) 0 40px;
  border-top: 1px solid var(--line-strong);
  color: var(--muted);
  font-size: 0.88rem;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) repeat(4, minmax(0, 1fr));
  gap: clamp(24px, 3vw, 44px);
}

.footer-brand-block > p {
  max-width: 34ch;
  margin: 12px 0 0;
}

.footer-brand img {
  width: 44px;
  height: 44px;
}

.footer-col h2 {
  margin: 0 0 14px;
  color: var(--ink);
  font-size: 0.86rem;
  font-weight: 730;
  letter-spacing: 0;
}

.footer-col ul {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-col a:hover,
.footer-col a:focus-visible {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-bottom {
  display: grid;
  gap: 6px;
  margin-top: clamp(32px, 4vw, 48px);
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
}

/* ---------- Chinese typography ---------- */

body[data-lang="zh"] .hero h1 {
  font-size: clamp(2.6rem, 4.1vw, 3.5rem);
  letter-spacing: 0;
  line-height: 1.1;
  word-break: keep-all;
}

body[data-lang="zh"] h2,
body[data-lang="zh"] h3 {
  letter-spacing: 0;
  word-break: normal;
  overflow-wrap: break-word;
}

.hero > *,
.feature-row > *,
.security-grid > *,
.pilot-section > *,
.faq-section > *,
.contact-section > *,
.footer-top > * {
  min-width: 0;
}

/* ---------- Responsive ---------- */

@media (max-width: 1180px) {
  .entry-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 1060px) {
  .site-header {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .menu-button {
    display: block;
    grid-column: 2;
    grid-row: 1;
  }

  .site-nav,
  .header-actions {
    display: none;
    grid-column: 1 / -1;
  }

  .site-header.is-open .site-nav {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    grid-row: 2;
    gap: 8px;
    width: 100%;
    padding-top: 12px;
  }

  .site-header.is-open .site-nav a {
    padding: 9px 8px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    text-align: center;
  }

  .site-header.is-open .header-actions {
    display: flex;
    grid-row: 3;
    flex-wrap: wrap;
    justify-content: space-between;
    padding: 4px 0 10px;
  }

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

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

  .footer-brand-block {
    grid-column: 1 / -1;
  }
}

@media (max-width: 920px) {
  .hero,
  .feature-row,
  .feature-row:nth-of-type(even),
  .security-grid,
  .pilot-section,
  .faq-section,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero {
    gap: 34px;
    min-height: auto;
    padding: 44px 0 52px;
  }

  .brand-story-intro,
  .capability-grid,
  .capability-card:nth-child(3) {
    grid-template-columns: 1fr;
  }

  .story-mark {
    max-width: 170px;
  }

  .capability-card:nth-child(3) {
    grid-column: auto;
  }

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

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

  .feature-row:nth-of-type(even) .feature-copy {
    order: 0;
  }

  .feature-row {
    gap: 30px;
  }

  .faq-section {
    gap: 30px;
  }

  .faq-heading h2 {
    max-width: none;
  }
}

@media (max-width: 700px) {
  .site-shell {
    padding: 0 18px;
  }

  .brand img {
    width: 38px;
    height: 38px;
  }

  .brand-name {
    font-size: 0.98rem;
  }

  .brand-story {
    padding: 38px 24px;
  }

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

  .run-outcomes div,
  .run-outcomes div:first-child {
    padding: 20px 14px 0;
    border-left: 1px solid var(--line);
  }

  .run-outcomes div:nth-child(odd) {
    padding-left: 0;
    border-left: 0;
  }

  .capability-grid {
    gap: 14px;
  }

  .site-header.is-open .site-nav {
    grid-template-columns: 1fr 1fr;
  }

  .site-header.is-open .header-actions {
    align-items: stretch;
  }

  .site-header.is-open .nav-cta {
    flex: 1;
  }

  .hero h1,
  body[data-lang="zh"] .hero h1 {
    font-size: clamp(2.3rem, 10.5vw, 3.1rem);
  }

  body[data-lang="zh"] .hero h1 {
    word-break: normal;
    overflow-wrap: anywhere;
  }

  .brand-story h2 {
    max-width: none;
    font-size: clamp(1.8rem, 8.2vw, 2.35rem);
  }

  .hero h1 span {
    white-space: normal;
  }

  .entry-list,
  .deploy-grid,
  .proof-grid,
  .security-list,
  .inquiry-form,
  .footer-top {
    grid-template-columns: 1fr;
  }

  .proof-card li {
    grid-template-columns: 1fr;
    gap: 3px;
  }

  .pilot-facts div {
    grid-template-columns: 78px minmax(0, 1fr);
    gap: 18px;
  }

  .inquiry-form label:nth-of-type(4),
  .inquiry-form .button,
  .form-status {
    grid-column: auto;
  }

  .footer-top {
    gap: 28px;
  }
}

@media (max-width: 440px) {
  body[data-lang="zh"] .hero h1 {
    font-size: clamp(2.1rem, 9.8vw, 2.7rem);
    word-break: normal;
  }

  .site-header.is-open .header-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .language-select,
  .language-select select,
  .nav-cta,
  .hero-actions,
  .hero-actions .button {
    width: 100%;
  }

  .wechat-card {
    grid-template-columns: 1fr;
  }

  .wechat-card img {
    grid-column: 1;
    grid-row: auto;
    margin-top: 8px;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}