:root {
  --ink: #132124;
  --muted: #5e6c6e;
  --paper: #ffffff;
  --mist: #f3f7f6;
  --line: #dbe5e3;
  --teal: #087f74;
  --teal-dark: #075d56;
  --teal-soft: #dff3ef;
  --coral: #ec6f5e;
  --coral-soft: #fff0ec;
  --sky: #5ca7c5;
  --gold: #b68b3c;
  --charcoal: #101a1c;
  --shadow: 0 18px 50px rgba(16, 42, 45, 0.11);
  --radius: 8px;
  --container: 1180px;
  --header: 76px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

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

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

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

h1,
h2,
h3,
h4 {
  line-height: 1.24;
  letter-spacing: 0;
}

h1 {
  font-size: 52px;
  margin-bottom: 22px;
}

h2 {
  font-size: 36px;
  margin-bottom: 18px;
}

h3 {
  font-size: 22px;
  margin-bottom: 12px;
}

p:last-child {
  margin-bottom: 0;
}

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

.section {
  padding: 96px 0;
}

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

.section-dark {
  color: #fff;
  background: var(--charcoal);
}

.section-mist {
  background: var(--mist);
}

.section-teal {
  color: #fff;
  background: var(--teal-dark);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.62fr);
  gap: 72px;
  align-items: end;
  margin-bottom: 44px;
}

.section-head.centered {
  display: block;
  max-width: 760px;
  margin-inline: auto;
  text-align: center;
}

.section-head p {
  color: var(--muted);
  margin-bottom: 5px;
}

.section-dark .section-head p,
.section-teal .section-head p {
  color: rgba(255, 255, 255, 0.72);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 16px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 20px;
  height: 2px;
  content: "";
  background: currentColor;
}

.section-dark .eyebrow,
.section-teal .eyebrow,
.inner-hero .eyebrow {
  color: #75d7c8;
}

.lead {
  color: var(--muted);
  font-size: 19px;
  line-height: 1.75;
}

.fine-print {
  color: var(--muted);
  font-size: 12px;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--teal-dark);
  font-weight: 700;
}

.text-link:hover {
  color: var(--teal);
}

.icon {
  width: 20px;
  height: 20px;
  flex: none;
  stroke-width: 1.8;
}

.icon-lg {
  width: 28px;
  height: 28px;
}

.site-header {
  position: sticky;
  z-index: 1000;
  top: 0;
  height: var(--header);
  border-bottom: 1px solid rgba(219, 229, 227, 0.88);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
}

.nav-shell {
  display: flex;
  height: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  min-width: 120px;
  align-items: center;
  gap: 11px;
  font-size: 23px;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  color: #fff;
  background: var(--teal);
  border-radius: 50%;
  place-items: center;
  font-size: 16px;
}

.brand small {
  display: block;
  color: var(--muted);
  font-size: 9px;
  font-weight: 700;
  line-height: 1.1;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-item {
  position: relative;
}

.nav-link,
.nav-toggle {
  display: inline-flex;
  min-height: 44px;
  padding: 10px 13px;
  border: 0;
  color: #314143;
  background: transparent;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
}

.nav-link:hover,
.nav-link.active,
.nav-toggle:hover,
.nav-item.active > .nav-toggle {
  color: var(--teal);
}

.nav-toggle .icon {
  width: 14px;
  height: 14px;
}

.dropdown {
  position: absolute;
  top: calc(100% + 7px);
  left: 50%;
  display: none;
  width: 270px;
  padding: 10px;
  transform: translateX(-50%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
}

.nav-item:hover .dropdown,
.nav-item:focus-within .dropdown,
.nav-item.open .dropdown {
  display: block;
}

.dropdown a {
  display: grid;
  padding: 11px 12px;
  border-radius: 6px;
  grid-template-columns: 30px 1fr;
  gap: 10px;
  font-size: 14px;
}

.dropdown a:hover {
  background: var(--mist);
}

.dropdown strong,
.dropdown span {
  display: block;
}

.dropdown span {
  color: var(--muted);
  font-size: 11px;
  font-weight: 400;
}

.dropdown .icon {
  color: var(--teal);
}

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

.menu-button {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink);
  background: #fff;
  align-items: center;
  justify-content: center;
}

.btn {
  display: inline-flex;
  min-height: 46px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: 6px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 700;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

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

.btn-primary {
  color: #fff;
  background: var(--teal);
}

.btn-primary:hover {
  background: var(--teal-dark);
}

.btn-coral {
  color: #fff;
  background: var(--coral);
}

.btn-light {
  color: var(--ink);
  background: #fff;
}

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

.btn-outline-light {
  border-color: rgba(255, 255, 255, 0.42);
  color: #fff;
  background: rgba(255, 255, 255, 0.04);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.home-hero {
  position: relative;
  display: flex;
  height: calc(100svh - 112px);
  min-height: 620px;
  max-height: 800px;
  overflow: hidden;
  color: #fff;
  background-color: var(--charcoal);
  background-image: url("../images/hero-ring.webp?v=2");
  background-position: center;
  background-size: cover;
  align-items: center;
}

.home-hero::after {
  position: absolute;
  inset: 0;
  content: "";
  background: rgba(7, 18, 20, 0.1);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(620px, 52%);
}

.hero-kicker {
  margin-bottom: 20px;
  color: #8be2d5;
  font-size: 15px;
  font-weight: 700;
}

.home-hero h1 {
  margin-bottom: 16px;
  font-size: 58px;
}

.hero-subtitle {
  margin-bottom: 10px;
  font-size: 25px;
  font-weight: 700;
}

.hero-copy {
  max-width: 570px;
  margin-bottom: 30px;
  color: rgba(255, 255, 255, 0.75);
  font-size: 17px;
}

.hero-proof {
  display: flex;
  margin-top: 34px;
  flex-wrap: wrap;
  gap: 20px 26px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 13px;
}

.hero-proof span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.hero-proof .icon {
  color: #75d7c8;
}

.system-rail {
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.system-rail-grid {
  display: grid;
  min-height: 104px;
  grid-template-columns: repeat(5, 1fr);
}

.rail-item {
  display: flex;
  min-width: 0;
  padding: 21px 16px;
  border-right: 1px solid var(--line);
  align-items: center;
  gap: 12px;
}

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

.rail-item .icon {
  color: var(--teal);
}

.rail-item strong,
.rail-item small {
  display: block;
}

.rail-item strong {
  font-size: 14px;
}

.rail-item small {
  color: var(--muted);
  font-size: 11px;
}

.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: 24px;
}

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

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

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.feature-card,
.solution-card,
.metric-card,
.security-card,
.case-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.feature-card,
.security-card {
  padding: 28px;
}

.feature-card .icon-wrap,
.security-card .icon-wrap,
.metric-card .icon-wrap {
  display: grid;
  width: 44px;
  height: 44px;
  margin-bottom: 24px;
  border-radius: 6px;
  color: var(--teal-dark);
  background: var(--teal-soft);
  place-items: center;
}

.feature-card p,
.security-card p,
.metric-card p {
  color: var(--muted);
  font-size: 14px;
}

.feature-card.accent {
  border-color: #ffc9bf;
  background: var(--coral-soft);
}

.feature-card.accent .icon-wrap {
  color: #b84234;
  background: #ffe0d9;
}

.flow {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
}

.flow-step {
  position: relative;
  min-height: 218px;
  padding: 26px 22px;
  border-top: 3px solid var(--teal);
  background: #fff;
}

.flow-step:not(:last-child)::after {
  position: absolute;
  z-index: 1;
  top: 36px;
  right: -20px;
  display: grid;
  width: 28px;
  height: 28px;
  content: "\2192";
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--teal);
  background: #fff;
  place-items: center;
  font-weight: 700;
}

.flow-step b {
  display: block;
  margin-bottom: 22px;
  color: var(--teal);
  font-size: 12px;
}

.flow-step p {
  color: var(--muted);
  font-size: 13px;
}

.product-split {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  align-items: stretch;
}

.product-copy {
  padding: 72px max(48px, calc((100vw - var(--container)) / 2));
  padding-right: 60px;
  color: #fff;
  background: var(--charcoal);
}

.product-copy.right {
  order: 2;
  padding-right: max(48px, calc((100vw - var(--container)) / 2));
  padding-left: 60px;
  background: var(--teal-dark);
}

.product-media {
  position: relative;
  min-height: 580px;
  overflow: hidden;
  background: #dfe8e6;
}

.product-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-media.radar-media {
  background: #eef5f1;
}

.product-media.radar-media img {
  object-fit: contain;
  padding: 56px;
}

.check-list,
.plain-list {
  padding: 0;
  margin: 24px 0 30px;
  list-style: none;
}

.check-list li {
  display: flex;
  margin-bottom: 12px;
  align-items: flex-start;
  gap: 10px;
}

.check-list .icon {
  margin-top: 3px;
  color: #75d7c8;
}

.plain-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.screenshot-stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 72px;
  align-items: center;
}

.phone-stack {
  position: relative;
  height: 650px;
}

.phone {
  position: absolute;
  width: 270px;
  padding: 9px;
  border: 1px solid #263436;
  border-radius: 32px;
  background: #0f1718;
  box-shadow: 0 28px 70px rgba(15, 34, 37, 0.24);
}

.phone:first-child {
  top: 0;
  left: 0;
  transform: rotate(-3deg);
}

.phone:last-child {
  right: 0;
  bottom: 0;
  transform: rotate(3deg);
}

.phone img {
  width: 100%;
  height: 535px;
  border-radius: 24px;
  object-fit: cover;
  object-position: top;
}

.stat-line {
  display: grid;
  margin: 32px 0;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
}

.stat {
  padding: 26px 20px;
  background: #fff;
}

.stat strong {
  display: block;
  color: var(--teal-dark);
  font-size: 31px;
}

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

.wechat-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 420px;
  gap: 72px;
  align-items: center;
}

.wechat-panel.platform-wechat {
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 36px;
}

.wechat-shot {
  height: 580px;
  padding: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
}

.wechat-shot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
}

.inner-hero {
  position: relative;
  display: flex;
  min-height: 430px;
  padding: 72px 0;
  overflow: hidden;
  color: #fff;
  background: var(--charcoal);
  align-items: center;
}

.inner-hero h1 {
  max-width: 820px;
  font-size: 48px;
}

.inner-hero p {
  max-width: 720px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 18px;
}

.inner-hero .button-row {
  margin-top: 30px;
}

.inner-hero.product-ring {
  background-image: url("../images/ring-scene.webp?v=2");
  background-position: center;
  background-size: cover;
}

.inner-hero.product-ring::before {
  position: absolute;
  inset: 0;
  content: "";
  background: rgba(16, 26, 28, 0.72);
}

.breadcrumb {
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  background: #fff;
  font-size: 12px;
}

.breadcrumb a:hover {
  color: var(--teal);
}

.breadcrumb span {
  margin: 0 8px;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.metric-card {
  min-height: 200px;
  padding: 24px;
}

.metric-card strong {
  display: block;
  margin-bottom: 5px;
  font-size: 20px;
}

.pillars {
  display: grid;
  grid-template-columns: 330px minmax(0, 1fr);
  gap: 70px;
}

.pillars > * {
  min-width: 0;
}

.pillar-nav {
  position: sticky;
  top: calc(var(--header) + 30px);
  height: max-content;
  border-left: 1px solid var(--line);
}

.pillar-nav a {
  display: block;
  padding: 13px 20px;
  color: var(--muted);
  font-size: 14px;
}

.pillar-nav a:hover {
  border-left: 2px solid var(--teal);
  color: var(--teal-dark);
}

.pillar-block {
  padding-bottom: 54px;
  margin-bottom: 54px;
  border-bottom: 1px solid var(--line);
}

.pillar-block:last-child {
  border: 0;
}

.dashboard-frame {
  padding: 12px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
}

.dashboard-frame img {
  width: 100%;
}

.radar-overview {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 64px;
  align-items: center;
}

.radar-visual {
  display: grid;
  min-height: 480px;
  padding: 44px;
  border: 1px solid var(--line);
  background: #eef5f1;
  place-items: center;
}

.radar-visual img {
  max-height: 410px;
  object-fit: contain;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
}

.spec-table th,
.spec-table td {
  padding: 14px 15px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  text-align: left;
  font-size: 14px;
}

.spec-table th {
  width: 34%;
  color: var(--muted);
  font-weight: 600;
}

.tabs {
  display: inline-flex;
  padding: 4px;
  margin-bottom: 30px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
}

.tab-button {
  min-height: 40px;
  padding: 8px 18px;
  border: 0;
  border-radius: 4px;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  font-weight: 700;
}

.tab-button.active {
  color: #fff;
  background: var(--teal);
}

.tab-panel[hidden] {
  display: none;
}

.installation {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
}

.install-step {
  min-height: 230px;
  padding: 28px 24px;
  background: #fff;
}

.install-step strong {
  display: grid;
  width: 38px;
  height: 38px;
  margin-bottom: 28px;
  border-radius: 50%;
  color: #fff;
  background: var(--teal);
  place-items: center;
}

.architecture {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  align-items: stretch;
  gap: 10px;
}

.arch-node {
  position: relative;
  min-height: 170px;
  padding: 24px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  text-align: center;
}

.arch-node:not(:last-child)::after {
  position: absolute;
  top: 50%;
  right: -14px;
  content: "\2192";
  color: var(--teal);
  font-weight: 800;
}

.arch-node .icon {
  width: 30px;
  height: 30px;
  margin-bottom: 17px;
  color: var(--teal);
}

.arch-node span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.solution-card {
  overflow: hidden;
}

.solution-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.solution-card-body {
  padding: 26px;
}

.solution-card-body p {
  color: var(--muted);
  font-size: 14px;
}

.solution-card .tag {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 700;
}

.scenario-band {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  gap: 64px;
  align-items: center;
}

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

.scenario-point {
  min-height: 140px;
  padding: 22px;
  border-left: 3px solid var(--teal);
  background: var(--mist);
}

.scenario-point p {
  color: var(--muted);
  font-size: 13px;
}

.risk-note {
  padding: 22px 24px;
  border-left: 3px solid var(--gold);
  color: #5d4a23;
  background: #fff8e8;
  font-size: 13px;
}

.quote-band {
  padding: 62px 0;
  color: #fff;
  background: var(--teal-dark);
}

.quote-band blockquote {
  max-width: 900px;
  margin: 0;
  font-size: 31px;
  font-weight: 700;
  line-height: 1.45;
}

.roadmap {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.roadmap-item {
  padding: 26px;
  border-top: 3px solid var(--teal);
  background: var(--mist);
}

.roadmap-item small {
  color: var(--teal);
  font-weight: 700;
}

.faq {
  max-width: 900px;
  margin-inline: auto;
  border-top: 1px solid var(--line);
}

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

.faq-question {
  display: flex;
  width: 100%;
  min-height: 72px;
  padding: 18px 4px;
  border: 0;
  color: var(--ink);
  background: transparent;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  cursor: pointer;
  text-align: left;
  font-weight: 700;
}

.faq-question .icon {
  transition: transform 160ms ease;
}

.faq-item.open .faq-question .icon {
  transform: rotate(45deg);
}

.faq-answer {
  display: none;
  padding: 0 40px 22px 4px;
  color: var(--muted);
}

.faq-item.open .faq-answer {
  display: block;
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 72px;
  align-items: start;
}

.contact-aside {
  position: sticky;
  top: calc(var(--header) + 34px);
}

.contact-method {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.contact-method span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.contact-method strong {
  font-size: 20px;
}

.form-panel {
  padding: 38px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
}

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

.form-field {
  display: grid;
  gap: 8px;
}

.form-field.full {
  grid-column: 1 / -1;
}

.form-field label {
  font-size: 13px;
  font-weight: 700;
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  min-height: 48px;
  padding: 10px 13px;
  border: 1px solid #cad7d5;
  border-radius: 5px;
  color: var(--ink);
  background: #fff;
}

.form-field textarea {
  min-height: 130px;
  resize: vertical;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: var(--teal);
  outline: 3px solid rgba(8, 127, 116, 0.11);
}

.form-status {
  min-height: 24px;
  margin-top: 12px;
  color: var(--teal-dark);
  font-size: 13px;
}

.cta-band {
  padding: 64px 0;
  color: #fff;
  background: var(--charcoal);
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 50px;
}

.cta-inner h2 {
  margin-bottom: 8px;
  font-size: 32px;
}

.cta-inner p {
  color: rgba(255, 255, 255, 0.68);
}

.site-footer {
  padding: 64px 0 28px;
  color: rgba(255, 255, 255, 0.74);
  background: #0a1214;
}

.footer-grid {
  display: grid;
  padding-bottom: 48px;
  grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: 50px;
}

.footer-brand p {
  max-width: 380px;
  margin-top: 18px;
  font-size: 13px;
}

.footer-col strong {
  display: block;
  margin-bottom: 17px;
  color: #fff;
  font-size: 13px;
}

.footer-col a {
  display: block;
  margin: 9px 0;
  font-size: 13px;
}

.footer-col a:hover {
  color: #75d7c8;
}

.footer-bottom {
  display: flex;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  justify-content: space-between;
  gap: 20px;
  font-size: 11px;
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 520ms ease, transform 520ms ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.skip-link {
  position: fixed;
  z-index: 2000;
  top: 8px;
  left: 8px;
  padding: 8px 12px;
  transform: translateY(-150%);
  color: #fff;
  background: var(--teal-dark);
}

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

@media (max-width: 1050px) {
  .primary-nav,
  .nav-actions .btn {
    display: none;
  }

  .menu-button {
    display: inline-flex;
  }

  .primary-nav.mobile-open {
    position: fixed;
    inset: var(--header) 0 0;
    display: block;
    height: calc(100svh - var(--header));
    padding: 20px 24px 90px;
    overflow-y: auto;
    background: #fff;
    overscroll-behavior: contain;
  }

  .primary-nav.mobile-open .nav-link,
  .primary-nav.mobile-open .nav-toggle {
    width: 100%;
    min-height: 54px;
    padding: 12px 4px;
    border-bottom: 1px solid var(--line);
    justify-content: space-between;
    font-size: 16px;
  }

  .primary-nav.mobile-open .dropdown {
    position: static;
    width: 100%;
    padding: 7px 0 12px 14px;
    transform: none;
    border: 0;
    box-shadow: none;
  }

  .primary-nav.mobile-open .nav-item:not(.open) .dropdown {
    display: none;
  }

  .section-head {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .grid-4,
  .metric-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .flow {
    grid-template-columns: repeat(3, 1fr);
  }

  .flow-step:nth-child(3)::after {
    display: none;
  }

  .product-copy,
  .product-copy.right {
    padding: 60px 42px;
  }

  .screenshot-stage,
  .wechat-panel,
  .wechat-panel.platform-wechat,
  .contact-layout,
  .radar-overview {
    gap: 42px;
  }

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

@media (max-width: 800px) {
  :root {
    --header: 68px;
  }

  .container {
    width: min(calc(100% - 32px), var(--container));
  }

  .section {
    padding: 72px 0;
  }

  h1 {
    font-size: 38px;
  }

  h2 {
    font-size: 30px;
  }

  .home-hero {
    height: auto;
    min-height: calc(100svh - 98px);
    max-height: none;
    padding: 72px 0 76px;
    background-position: 60% center;
  }

  .home-hero::after {
    background: rgba(7, 18, 20, 0.54);
  }

  .hero-content {
    width: 100%;
  }

  .home-hero h1 {
    max-width: 480px;
    font-size: 44px;
  }

  .hero-subtitle {
    max-width: 500px;
    font-size: 20px;
  }

  .hero-copy {
    max-width: 520px;
    font-size: 15px;
  }

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

  .rail-item,
  .rail-item:first-child {
    border-left: 0;
    border-bottom: 1px solid var(--line);
  }

  .rail-item:last-child {
    grid-column: 1 / -1;
  }

  .grid-3,
  .product-split,
  .screenshot-stage,
  .wechat-panel,
  .contact-layout,
  .radar-overview,
  .scenario-band,
  .pillars {
    grid-template-columns: 1fr;
  }

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

  .flow-step {
    min-height: 0;
  }

  .flow-step:not(:last-child)::after {
    top: auto;
    right: 24px;
    bottom: -21px;
    content: "\2193";
  }

  .product-copy,
  .product-copy.right {
    order: 0;
    padding: 54px 24px;
  }

  .product-media {
    min-height: 430px;
  }

  .phone-stack {
    width: min(100%, 520px);
    margin-inline: auto;
  }

  .wechat-shot {
    width: min(100%, 460px);
    margin-inline: auto;
  }

  .inner-hero {
    min-height: 370px;
  }

  .inner-hero h1 {
    font-size: 38px;
  }

  .pillar-nav,
  .contact-aside {
    position: static;
  }

  .pillar-nav {
    display: flex;
    width: 100%;
    max-width: 100%;
    padding-bottom: 10px;
    overflow-x: auto;
    border-left: 0;
    border-bottom: 1px solid var(--line);
  }

  .pillar-nav a {
    flex: none;
  }

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

  .arch-node {
    min-height: 0;
    text-align: left;
  }

  .arch-node:not(:last-child)::after {
    top: auto;
    right: 20px;
    bottom: -19px;
    content: "\2193";
  }

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

  .cta-inner {
    display: block;
  }

  .cta-inner .button-row {
    margin-top: 26px;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 15px;
  }

  h1,
  .home-hero h1,
  .inner-hero h1 {
    font-size: 34px;
  }

  h2 {
    font-size: 27px;
  }

  h3 {
    font-size: 20px;
  }

  .lead {
    font-size: 17px;
  }

  .home-hero {
    min-height: calc(100svh - 84px);
    padding: 58px 0 64px;
    background-position: 66% center;
  }

  .hero-kicker {
    font-size: 12px;
  }

  .hero-proof {
    gap: 12px 18px;
  }

  .hero-proof span {
    width: calc(50% - 9px);
  }

  .button-row .btn {
    width: 100%;
  }

  .grid-2,
  .grid-4,
  .metric-grid,
  .roadmap,
  .installation,
  .scenario-points,
  .stat-line,
  .form-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .feature-card,
  .security-card,
  .metric-card,
  .form-panel {
    padding: 22px;
  }

  .product-media {
    min-height: 320px;
  }

  .product-media.radar-media img,
  .radar-visual {
    padding: 24px;
  }

  .radar-visual {
    min-height: 270px;
  }

  .phone-stack {
    height: 565px;
  }

  .phone {
    width: 218px;
  }

  .phone img {
    height: 433px;
  }

  .phone:first-child {
    left: 0;
  }

  .phone:last-child {
    right: 0;
  }

  .wechat-shot {
    height: 500px;
  }

  .inner-hero {
    min-height: 350px;
    padding: 55px 0;
  }

  .quote-band blockquote {
    font-size: 24px;
  }

  .footer-bottom {
    display: block;
  }

  .footer-bottom span {
    display: block;
    margin-top: 8px;
  }
}

/* Real WeChat case and commercial contact */
.wechat-case-preview {
  position: relative;
  display: block;
  max-width: 520px;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #e8ebea;
  box-shadow: var(--shadow);
}

.wechat-case-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  transition: transform 220ms ease;
}

.wechat-case-preview:hover img {
  transform: scale(1.015);
}

.case-preview-label,
.case-preview-action {
  position: absolute;
  z-index: 1;
  display: inline-flex;
  padding: 8px 10px;
  border-radius: 5px;
  align-items: center;
  gap: 7px;
  font-size: 10px;
  font-weight: 700;
}

.case-preview-label {
  top: 14px;
  left: 14px;
  color: #fff;
  background: var(--coral);
}

.case-preview-action {
  right: 14px;
  bottom: 14px;
  color: #fff;
  background: rgba(12, 27, 30, 0.9);
}

.case-preview-label .icon,
.case-preview-action .icon {
  width: 14px;
  height: 14px;
}

.case-evidence-list {
  margin: 27px 0;
}

.case-evidence-list > div {
  display: grid;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
  grid-template-columns: 36px 1fr;
  gap: 10px;
}

.case-evidence-list b {
  color: var(--coral);
  font-size: 11px;
}

.case-evidence-list span {
  color: var(--muted);
  font-size: 13px;
}

.case-evidence-list strong {
  display: block;
  margin-bottom: 3px;
  color: var(--ink);
}

.contact-hero {
  background: #122124;
}

.contact-qr-card {
  display: grid;
  margin: 28px 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  grid-template-columns: 190px 1fr;
  align-items: center;
  gap: 18px;
  box-shadow: var(--shadow);
}

.contact-qr-card img {
  width: 190px;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  object-position: center 59%;
}

.contact-qr-card strong,
.contact-qr-card span,
.contact-qr-card small {
  display: block;
}

.contact-qr-card strong {
  margin-bottom: 6px;
  font-size: 17px;
}

.contact-qr-card span {
  color: var(--teal-dark);
  font-size: 12px;
  font-weight: 700;
}

.contact-qr-card small {
  margin-top: 6px;
  color: var(--muted);
  font-size: 10px;
}

.case-hero {
  position: relative;
  background: #122124 url("../images/commercial-hero.webp") center center / cover no-repeat;
}

.case-hero::before {
  position: absolute;
  inset: 0;
  content: "";
  background: rgba(5, 15, 19, 0.7);
}

.case-hero > .container {
  position: relative;
  z-index: 1;
}

.case-proof-rail {
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.case-proof-rail > .container {
  display: grid;
  min-height: 110px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.case-proof-rail .container > div {
  display: flex;
  padding: 22px 20px;
  border-right: 1px solid var(--line);
  align-items: center;
  gap: 12px;
}

.case-proof-rail .container > div:first-child {
  border-left: 1px solid var(--line);
}

.case-proof-rail .icon {
  color: var(--teal);
}

.case-proof-rail strong,
.case-proof-rail small {
  display: block;
}

.case-proof-rail strong {
  font-size: 13px;
}

.case-proof-rail small {
  color: var(--muted);
  font-size: 10px;
}

.case-intro-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.65fr);
  gap: 80px;
  align-items: start;
}

.case-summary-list {
  margin-top: 30px;
  border-top: 1px solid var(--line);
}

.case-summary-list article {
  display: grid;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  grid-template-columns: 48px 1fr;
  gap: 12px;
}

.case-summary-list b {
  color: var(--coral);
  font-size: 11px;
}

.case-summary-list h3 {
  margin-bottom: 6px;
  font-size: 17px;
}

.case-summary-list p {
  color: var(--muted);
  font-size: 12px;
}

.case-meta {
  padding: 28px;
  border-top: 4px solid var(--teal);
  background: var(--mist);
}

.case-meta > span {
  display: block;
  margin-bottom: 20px;
  color: var(--teal);
  font-size: 11px;
  font-weight: 700;
}

.case-meta dl {
  margin: 0;
}

.case-meta dl > div {
  display: grid;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  grid-template-columns: 76px 1fr;
  gap: 12px;
}

.case-meta dt {
  color: var(--muted);
  font-size: 11px;
}

.case-meta dd {
  margin: 0;
  font-size: 12px;
  font-weight: 700;
}

.case-record-image {
  position: relative;
  display: block;
  max-width: 1120px;
  margin-inline: auto;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #e8ebea;
  box-shadow: var(--shadow);
}

.case-record-image img {
  width: 100%;
}

.case-record-image > span {
  position: absolute;
  top: 16px;
  right: 16px;
  display: inline-flex;
  padding: 9px 11px;
  border-radius: 5px;
  color: #fff;
  background: rgba(12, 27, 30, 0.9);
  align-items: center;
  gap: 7px;
  font-size: 10px;
  font-weight: 700;
}

.case-record-image > span .icon {
  width: 14px;
  height: 14px;
}

.case-analysis-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.case-analysis-grid article {
  min-height: 280px;
  padding: 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.case-analysis-grid article > span {
  display: block;
  margin-bottom: 46px;
  color: var(--teal);
  font-size: 10px;
  font-weight: 700;
}

.case-analysis-grid h3 {
  font-size: 18px;
}

.case-analysis-grid ul {
  padding-left: 18px;
  color: var(--muted);
  font-size: 12px;
}

.case-analysis-grid li {
  margin-bottom: 10px;
}

.baseline-case-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  align-items: stretch;
}

.baseline-case-flow > div {
  min-height: 200px;
  padding: 26px 20px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  text-align: center;
}

.baseline-case-flow > .icon {
  align-self: center;
  margin: 0 12px;
  color: var(--coral);
}

.baseline-case-flow small,
.baseline-case-flow strong,
.baseline-case-flow span {
  display: block;
}

.baseline-case-flow small {
  margin-bottom: 30px;
  color: #79d9ca;
  font-size: 10px;
}

.baseline-case-flow strong {
  margin-bottom: 8px;
  font-size: 25px;
}

.baseline-case-flow em {
  margin-left: 4px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 9px;
  font-style: normal;
  font-weight: 400;
}

.baseline-case-flow span {
  color: rgba(255, 255, 255, 0.54);
  font-size: 10px;
}

.baseline-case-flow .alert strong {
  color: var(--coral);
}

.case-boundary-note {
  display: flex;
  margin-top: 22px;
  padding: 16px 18px;
  border-left: 3px solid var(--coral);
  color: rgba(255, 255, 255, 0.67);
  background: rgba(255, 255, 255, 0.05);
  align-items: flex-start;
  gap: 10px;
  font-size: 11px;
}

.case-boundary-note .icon {
  color: var(--coral);
}

.boundary-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 72px;
  align-items: center;
}

.boundary-evidence {
  border-top: 1px solid var(--line);
}

.boundary-evidence > div {
  display: flex;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
  align-items: flex-start;
  gap: 14px;
}

.boundary-evidence .icon {
  margin-top: 2px;
  color: var(--teal);
}

.boundary-evidence .boundary-dont .icon {
  color: var(--coral);
}

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

.boundary-evidence strong {
  display: block;
  margin-bottom: 5px;
  color: var(--ink);
}

.case-system-flow {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.case-system-flow article {
  position: relative;
  min-height: 240px;
  padding: 24px 20px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.case-system-flow b {
  position: absolute;
  top: 20px;
  right: 20px;
  color: #b9c5c3;
  font-size: 10px;
}

.case-system-flow .icon {
  margin: 36px 0 30px;
  color: var(--teal);
}

.case-system-flow h3 {
  font-size: 16px;
}

.case-system-flow p {
  color: var(--muted);
  font-size: 11px;
}

.case-contact-band {
  border-top: 1px solid var(--line);
}

.case-contact-layout {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 80px;
  align-items: center;
}

.case-contact-layout > div:first-child {
  max-width: 720px;
}

.case-mini-contact {
  display: flex;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow);
}

.case-mini-contact img {
  width: 120px;
  height: 120px;
  object-fit: cover;
  object-position: center 59%;
}

.case-mini-contact strong,
.case-mini-contact small {
  display: block;
}

.case-mini-contact small {
  margin-top: 5px;
  color: var(--muted);
  font-size: 10px;
}

@media (max-width: 900px) {
  .case-proof-rail > .container {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .case-intro-layout,
  .boundary-layout,
  .case-contact-layout {
    grid-template-columns: 1fr;
  }

  .case-intro-layout,
  .boundary-layout,
  .case-contact-layout {
    gap: 44px;
  }

  .case-meta {
    max-width: 620px;
  }

  .baseline-case-flow {
    grid-template-columns: 1fr;
  }

  .baseline-case-flow > .icon {
    margin: 12px auto;
    transform: rotate(90deg);
  }

  .case-system-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .case-mini-contact {
    width: fit-content;
  }
}

@media (max-width: 640px) {
  .wechat-case-preview {
    width: 100%;
    margin-inline: auto;
  }

  .contact-qr-card {
    grid-template-columns: 1fr;
    gap: 14px;
    text-align: center;
  }

  .contact-qr-card img {
    width: 220px;
    margin-inline: auto;
  }

  .case-proof-rail > .container,
  .case-analysis-grid,
  .case-system-flow {
    grid-template-columns: 1fr;
  }

  .case-proof-rail .container > div {
    min-height: 82px;
    border-bottom: 1px solid var(--line);
  }

  .case-analysis-grid article {
    min-height: 230px;
  }

  .case-record-image > span {
    top: 8px;
    right: 8px;
  }

  .case-mini-contact {
    width: 100%;
  }

  .case-mini-contact img {
    width: 100px;
    height: 100px;
  }
}

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

  *,
  *::before,
  *::after {
    transition: none !important;
  }

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

/* Commercial home and delivery experience */
.section-charcoal {
  color: #fff;
  background: #10191b;
}

.section-charcoal .section-head p,
.section-charcoal .lead {
  color: rgba(255, 255, 255, 0.7);
}

.section-charcoal .eyebrow {
  color: #79d9ca;
}

.commercial-hero {
  position: relative;
  display: flex;
  height: min(720px, calc(100svh - 112px));
  min-height: 590px;
  overflow: hidden;
  color: #fff;
  background: #0a171d url("../images/commercial-hero.webp") center center / cover no-repeat;
  align-items: center;
}

.commercial-hero::before {
  position: absolute;
  inset: 0;
  content: "";
  background: rgba(4, 13, 18, 0.46);
}

.commercial-hero-inner {
  position: relative;
  z-index: 1;
}

.commercial-hero-copy {
  width: min(660px, 58%);
}

.availability {
  display: inline-flex;
  margin-bottom: 20px;
  align-items: center;
  gap: 10px;
  color: #b6f0e6;
  font-size: 14px;
  font-weight: 700;
}

.availability span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #4bd7b8;
  box-shadow: 0 0 0 5px rgba(75, 215, 184, 0.16);
}

.commercial-hero h1 {
  max-width: 650px;
  margin-bottom: 14px;
  font-size: 62px;
}

.hero-value {
  margin-bottom: 13px;
  color: #fff;
  font-size: 25px;
  font-weight: 700;
}

.hero-intro {
  max-width: 640px;
  margin-bottom: 28px;
  color: rgba(255, 255, 255, 0.79);
  font-size: 17px;
  line-height: 1.78;
}

.commercial-proof {
  display: flex;
  margin-top: 30px;
  flex-wrap: wrap;
  gap: 12px 24px;
  color: rgba(255, 255, 255, 0.84);
  font-size: 13px;
}

.commercial-proof span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.commercial-proof .icon {
  width: 17px;
  height: 17px;
  color: #79d9ca;
}

.hero-caption {
  position: absolute;
  right: 22px;
  bottom: 16px;
  z-index: 1;
  color: rgba(255, 255, 255, 0.58);
  font-size: 11px;
}

.purchase-rail {
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.purchase-rail-grid {
  display: grid;
  min-height: 112px;
  grid-template-columns: 1.35fr repeat(5, minmax(0, 1fr));
}

.purchase-label,
.purchase-rail-grid > a {
  display: flex;
  min-width: 0;
  padding: 22px 17px;
  border-right: 1px solid var(--line);
  align-items: center;
}

.purchase-label {
  flex-direction: column;
  border-left: 1px solid var(--line);
  align-items: flex-start;
  justify-content: center;
}

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

.purchase-label strong {
  font-size: 16px;
}

.purchase-rail-grid > a {
  gap: 10px;
  transition: background 160ms ease, color 160ms ease;
}

.purchase-rail-grid > a:hover {
  color: var(--teal-dark);
  background: var(--mist);
}

.purchase-rail-grid > a > .icon {
  color: var(--teal);
}

.purchase-rail-grid strong,
.purchase-rail-grid small {
  display: block;
}

.purchase-rail-grid strong {
  font-size: 13px;
}

.purchase-rail-grid small {
  color: var(--muted);
  font-size: 10px;
  white-space: nowrap;
}

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

.advantage-item {
  position: relative;
  min-height: 330px;
  padding: 30px 26px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.advantage-item b {
  position: absolute;
  top: 24px;
  right: 24px;
  color: #b9c5c3;
  font-size: 13px;
}

.advantage-item > .icon {
  margin: 32px 0 34px;
  color: var(--teal);
}

.advantage-item h3 {
  font-size: 20px;
}

.advantage-item p {
  color: var(--muted);
  font-size: 14px;
}

.advantage-item > span {
  position: absolute;
  bottom: 26px;
  color: var(--coral);
  font-size: 12px;
  font-weight: 700;
}

.comparison-wrap {
  display: grid;
  margin-top: 52px;
  grid-template-columns: 0.72fr 1.65fr;
  gap: 40px;
  align-items: start;
}

.comparison-title {
  padding-top: 12px;
}

.comparison-table {
  border-top: 2px solid var(--ink);
}

.comparison-row {
  display: grid;
  min-height: 62px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line);
  grid-template-columns: 0.7fr 1fr 1.35fr;
  align-items: center;
  gap: 18px;
  font-size: 13px;
}

.comparison-row > span:nth-child(2) {
  color: #82908e;
}

.comparison-row > span:last-child {
  color: var(--teal-dark);
  font-weight: 700;
}

.comparison-row > span:last-child .icon {
  width: 16px;
  height: 16px;
  margin-right: 6px;
  vertical-align: -3px;
}

.comparison-head {
  min-height: 46px;
  color: var(--muted);
  background: var(--mist);
  font-size: 11px;
  font-weight: 700;
}

.loop-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  border-left: 1px solid rgba(255, 255, 255, 0.15);
}

.loop-grid article {
  position: relative;
  min-height: 220px;
  padding: 24px 20px;
  border-right: 1px solid rgba(255, 255, 255, 0.15);
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.loop-grid article:not(:last-child)::after {
  position: absolute;
  z-index: 2;
  top: 50%;
  right: -11px;
  width: 21px;
  height: 21px;
  content: "";
  border-top: 1px solid #79d9ca;
  border-right: 1px solid #79d9ca;
  background: #10191b;
  transform: translateY(-50%) rotate(45deg);
}

.loop-grid b {
  display: block;
  margin-bottom: 32px;
  color: #79d9ca;
  font-size: 11px;
}

.loop-grid .icon {
  margin-bottom: 24px;
  color: #f28b7b;
}

.loop-grid h3 {
  margin-bottom: 8px;
  font-size: 17px;
}

.loop-grid p {
  color: rgba(255, 255, 255, 0.58);
  font-size: 12px;
}

.evidence-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(520px, 1.18fr);
  gap: 72px;
  align-items: center;
}

.proof-list {
  padding: 0;
  margin: 28px 0 32px;
  list-style: none;
}

.proof-list li {
  display: flex;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  align-items: flex-start;
  gap: 12px;
  color: var(--muted);
  font-size: 13px;
}

.proof-list .icon {
  margin-top: 2px;
  color: var(--teal);
}

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

.app-gallery {
  position: relative;
  display: grid;
  min-height: 680px;
  padding: 28px;
  grid-template-columns: 1.08fr 0.92fr;
  grid-template-rows: repeat(2, minmax(0, 1fr));
  gap: 18px;
  background: #eaf1f0;
}

.app-shot {
  position: relative;
  min-width: 0;
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(19, 33, 36, 0.16);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 12px 30px rgba(12, 31, 35, 0.11);
}

.app-shot-main {
  grid-row: 1 / 3;
}

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

.app-shot figcaption {
  position: absolute;
  right: 10px;
  bottom: 10px;
  padding: 6px 9px;
  border-radius: 5px;
  color: #fff;
  background: rgba(10, 27, 31, 0.82);
  font-size: 10px;
  font-weight: 700;
}

.real-product-badge {
  position: absolute;
  top: 42px;
  left: 42px;
  z-index: 2;
  display: inline-flex;
  padding: 8px 11px;
  border-radius: 5px;
  color: #fff;
  background: var(--coral);
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 700;
  box-shadow: 0 8px 18px rgba(130, 44, 33, 0.2);
}

.real-product-badge .icon {
  width: 15px;
  height: 15px;
}

.baseline-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 82px;
  align-items: center;
}

.baseline-chart {
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.chart-caption {
  display: flex;
  margin-bottom: 32px;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.chart-caption span {
  color: var(--muted);
  font-size: 11px;
}

.temperature-row {
  display: grid;
  min-height: 68px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 12px;
}

.temperature-row > span {
  color: var(--muted);
  font-size: 13px;
}

.temperature-row > b {
  font-size: 21px;
}

.temperature-bar {
  position: relative;
  height: 8px;
  grid-column: 1 / 3;
  overflow: hidden;
  border-radius: 4px;
  background: #edf2f1;
}

.temperature-bar::after {
  display: block;
  height: 100%;
  content: "";
  border-radius: inherit;
  background: var(--teal);
}

.temperature-bar.personal::after {
  width: 42%;
}

.temperature-bar.current::after {
  width: 71%;
  background: var(--coral);
}

.temperature-bar.common::after {
  width: 92%;
  background: #9ba8a6;
}

.temperature-row.alert > b {
  color: var(--coral);
}

.baseline-callout {
  display: flex;
  margin-top: 24px;
  padding: 18px;
  border-left: 3px solid var(--coral);
  color: #764239;
  background: var(--coral-soft);
  align-items: flex-start;
  gap: 12px;
  font-size: 12px;
}

.baseline-callout .icon {
  color: var(--coral);
}

.baseline-points {
  display: flex;
  margin: 28px 0 22px;
  flex-wrap: wrap;
  gap: 8px;
}

.baseline-points span {
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--teal-dark);
  background: #fff;
  font-size: 12px;
  font-weight: 700;
}

.radar-proof-section {
  overflow: hidden;
}

.radar-proof-head {
  display: grid;
  margin-bottom: 38px;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 40px;
}

.radar-key {
  display: flex;
  padding-bottom: 10px;
  flex-wrap: wrap;
  gap: 8px;
}

.radar-key strong {
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--teal-dark);
  font-size: 12px;
}

.radar-data-shell {
  border: 1px solid #ccd9d7;
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow);
}

.radar-summary {
  display: grid;
  border-bottom: 1px solid var(--line);
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.radar-summary > div {
  padding: 19px 20px;
  border-right: 1px solid var(--line);
}

.radar-summary > div:last-child {
  border-right: 0;
}

.radar-summary small,
.radar-summary strong {
  display: block;
}

.radar-summary small {
  color: var(--muted);
  font-size: 11px;
}

.radar-summary strong {
  margin-top: 4px;
  font-size: 26px;
}

.radar-summary em {
  margin-left: 4px;
  color: var(--muted);
  font-size: 10px;
  font-style: normal;
  font-weight: 400;
}

.radar-tabs {
  display: flex;
  padding: 16px 20px 0;
  gap: 4px;
  background: #f8faf9;
}

.radar-tabs button {
  padding: 9px 14px;
  border: 0;
  border-bottom: 2px solid transparent;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  font-size: 12px;
  font-weight: 700;
}

.radar-tabs button.active {
  border-bottom-color: var(--teal);
  color: var(--teal-dark);
}

.radar-panel {
  padding: 16px 20px 8px;
  background: #f8faf9;
}

.radar-panel img {
  width: 100%;
  min-height: 220px;
  object-fit: contain;
  background: #fff;
}

.radar-legend {
  display: flex;
  padding: 0 22px 18px;
  flex-wrap: wrap;
  gap: 14px 20px;
  color: var(--muted);
  background: #f8faf9;
  font-size: 10px;
}

.radar-legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #ff6f6b;
}

.legend-dot.breath {
  background: #f0a11d;
}

.legend-dot.energy {
  background: #91a585;
}

.legend-dot.movement {
  background: #35c2c8;
}

.legend-dot.bed {
  background: #176aa6;
}

.radar-capability-grid {
  display: grid;
  margin-top: 24px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.radar-capability-grid article {
  display: grid;
  min-height: 140px;
  padding: 22px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  grid-template-columns: auto 1fr;
  align-content: center;
  column-gap: 12px;
}

.radar-capability-grid .icon {
  grid-row: 1 / 3;
  color: var(--teal);
}

.radar-capability-grid strong {
  font-size: 14px;
}

.radar-capability-grid span {
  color: var(--muted);
  font-size: 11px;
}

.technical-note {
  display: flex;
  margin-top: 20px;
  padding: 16px 18px;
  color: var(--muted);
  background: var(--mist);
  align-items: flex-start;
  gap: 10px;
  font-size: 11px;
}

.technical-note .icon {
  color: var(--teal);
}

.technical-note span {
  flex: 1;
}

.technical-note a {
  color: var(--teal-dark);
  font-weight: 700;
  white-space: nowrap;
}

.intervention-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 44px;
}

.intervention-methods {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  border-left: 1px solid rgba(255, 255, 255, 0.15);
}

.intervention-methods article {
  position: relative;
  min-height: 340px;
  padding: 26px 22px;
  border-right: 1px solid rgba(255, 255, 255, 0.15);
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.intervention-methods article > span {
  position: absolute;
  top: 24px;
  right: 20px;
  color: rgba(255, 255, 255, 0.38);
  font-size: 11px;
}

.method-icon {
  display: grid;
  width: 52px;
  height: 52px;
  margin: 48px 0 38px;
  border-radius: 6px;
  color: #fff;
  background: var(--teal);
  place-items: center;
}

.intervention-methods h3 {
  font-size: 18px;
}

.intervention-methods p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 12px;
}

.retest-panel {
  padding: 34px;
  border: 1px solid rgba(121, 217, 202, 0.28);
  border-radius: 8px;
  background: #172527;
}

.retest-label {
  color: #79d9ca;
  font-size: 12px;
  font-weight: 700;
}

.retest-metric {
  display: grid;
  margin: 30px 0;
  padding: 24px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.13);
  border-bottom: 1px solid rgba(255, 255, 255, 0.13);
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 18px;
}

.retest-metric > div {
  text-align: center;
}

.retest-metric small,
.retest-metric strong,
.retest-metric span {
  display: block;
}

.retest-metric small,
.retest-metric span {
  color: rgba(255, 255, 255, 0.52);
  font-size: 10px;
}

.retest-metric strong {
  font-size: 42px;
}

.retest-metric .after strong {
  color: #79d9ca;
}

.retest-result {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.retest-result .icon {
  color: #79d9ca;
}

.retest-result strong,
.retest-result span {
  display: block;
}

.retest-result strong {
  font-size: 14px;
}

.retest-result span {
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 11px;
}

.learning-line {
  display: flex;
  margin-top: 34px;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  color: rgba(255, 255, 255, 0.65);
  font-size: 10px;
}

.learning-line .icon {
  width: 14px;
  height: 14px;
  color: var(--coral);
}

.wechat-business-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 80px;
  align-items: center;
}

.wechat-demo {
  position: relative;
  max-width: 510px;
  padding-bottom: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #eef1f0;
  box-shadow: var(--shadow);
}

.wechat-demo-head {
  display: flex;
  height: 74px;
  padding: 0 20px;
  border-bottom: 1px solid #d6dfdd;
  background: #fff;
  align-items: center;
  gap: 12px;
}

.wechat-demo-head > div {
  flex: 1;
}

.wechat-demo-head strong,
.wechat-demo-head small {
  display: block;
}

.wechat-demo-head small {
  color: var(--muted);
  font-size: 10px;
}

.wechat-avatar {
  display: grid;
  width: 38px;
  height: 38px;
  border-radius: 6px;
  color: #fff;
  background: var(--teal);
  place-items: center;
  font-weight: 800;
}

.wechat-avatar.small {
  width: 30px;
  height: 30px;
  flex: none;
  font-size: 11px;
}

.chat-time {
  margin: 16px 0 12px;
  color: #929d9b;
  text-align: center;
  font-size: 9px;
}

.chat-row {
  display: flex;
  padding: 0 20px;
  margin: 12px 0;
  align-items: flex-start;
  gap: 9px;
}

.chat-row p {
  max-width: 78%;
  padding: 11px 13px;
  border-radius: 5px;
  color: #324245;
  background: #fff;
  font-size: 12px;
  line-height: 1.65;
}

.chat-row.self {
  justify-content: flex-end;
}

.chat-row.self p {
  background: #b9e999;
}

.chat-action {
  display: flex;
  margin: 14px 56px;
  padding: 13px 14px;
  border: 1px solid #a8d8d0;
  border-radius: 7px;
  background: #fff;
  align-items: center;
  gap: 10px;
}

.chat-action > .icon {
  color: var(--teal);
}

.chat-action > span {
  flex: 1;
}

.chat-action strong,
.chat-action small {
  display: block;
}

.chat-action strong {
  font-size: 12px;
}

.chat-action small {
  color: var(--muted);
  font-size: 9px;
}

.chat-action button {
  display: grid;
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: 50%;
  color: #fff;
  background: var(--teal);
  place-items: center;
}

.chat-action button .icon {
  width: 15px;
  height: 15px;
}

.demo-label {
  position: absolute;
  right: 14px;
  bottom: 8px;
  color: #8f9d9a;
  font-size: 9px;
}

.touchpoint-list {
  margin: 28px 0;
}

.touchpoint-list > div {
  display: grid;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  grid-template-columns: 36px 1fr;
  gap: 10px;
}

.touchpoint-list b {
  color: var(--coral);
  font-size: 11px;
}

.touchpoint-list strong {
  display: block;
  margin-bottom: 3px;
}

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

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

.package-card {
  padding: 36px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.primary-package {
  border-top: 4px solid var(--teal);
}

.package-head {
  position: relative;
  margin-bottom: 20px;
  padding-right: 130px;
}

.package-head span,
.package-head strong {
  display: block;
}

.package-head span {
  margin-bottom: 7px;
  color: var(--teal);
  font-size: 11px;
  font-weight: 700;
}

.package-head strong {
  font-size: 26px;
}

.package-head em {
  position: absolute;
  top: 0;
  right: 0;
  padding: 6px 8px;
  border-radius: 4px;
  color: #8a4a3f;
  background: var(--coral-soft);
  font-size: 10px;
  font-style: normal;
  font-weight: 700;
}

.package-card > p {
  color: var(--muted);
  font-size: 13px;
}

.package-list {
  padding: 0;
  margin: 26px 0 30px;
  list-style: none;
}

.package-list li {
  display: flex;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  align-items: center;
  gap: 10px;
  font-size: 13px;
}

.package-list .icon {
  width: 17px;
  height: 17px;
  color: var(--teal);
}

.delivery-boundary {
  display: flex;
  margin-top: 24px;
  padding: 18px 20px;
  border-left: 3px solid var(--gold);
  color: #6d5a35;
  background: #fff9e9;
  align-items: flex-start;
  gap: 12px;
  font-size: 12px;
}

.delivery-boundary .icon {
  color: var(--gold);
}

.center-action {
  margin-top: 28px;
  text-align: center;
}

.enterprise-architecture {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: stretch;
}

.arch-layer {
  min-height: 190px;
  padding: 28px;
  border: 1px solid var(--line);
  background: #fff;
}

.arch-layer small,
.arch-layer strong,
.arch-layer span {
  display: block;
}

.arch-layer small {
  margin-bottom: 34px;
  color: var(--teal);
  font-size: 10px;
  font-weight: 700;
}

.arch-layer strong {
  margin-bottom: 8px;
  font-size: 18px;
}

.arch-layer span {
  color: var(--muted);
  font-size: 11px;
}

.arch-arrow {
  display: grid;
  width: 50px;
  color: var(--coral);
  place-items: center;
}

.security-strip {
  display: grid;
  margin-top: 24px;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.security-strip span {
  display: flex;
  min-height: 76px;
  padding: 15px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
}

.security-strip .icon {
  color: var(--teal);
}

.pilot-timeline {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  border-left: 1px solid rgba(255, 255, 255, 0.15);
}

.pilot-timeline article {
  min-height: 250px;
  padding: 26px 22px;
  border-right: 1px solid rgba(255, 255, 255, 0.15);
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.pilot-timeline b {
  display: block;
  margin-bottom: 36px;
  color: #79d9ca;
  font-size: 11px;
}

.pilot-timeline h3 {
  font-size: 17px;
}

.pilot-timeline p {
  color: rgba(255, 255, 255, 0.58);
  font-size: 12px;
}

.pilot-timeline span {
  display: block;
  margin-top: 28px;
  color: var(--coral);
  font-size: 10px;
  font-weight: 700;
}

.acceptance-row {
  display: flex;
  margin-top: 24px;
  padding: 18px 20px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  color: rgba(255, 255, 255, 0.64);
  font-size: 11px;
}

.acceptance-row strong {
  margin-right: auto;
  color: #fff;
  font-size: 12px;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.scenario-grid > a {
  display: flex;
  min-height: 280px;
  padding: 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  flex-direction: column;
  transition: background 160ms ease, color 160ms ease;
}

.scenario-grid > a:hover {
  color: #fff;
  background: var(--teal-dark);
}

.scenario-grid > a > .icon {
  margin-bottom: 52px;
  color: var(--teal);
}

.scenario-grid > a:hover > .icon,
.scenario-grid > a:hover small {
  color: #9be8dc;
}

.scenario-grid span {
  margin-bottom: 8px;
  color: var(--coral);
  font-size: 11px;
  font-weight: 700;
}

.scenario-grid strong {
  max-width: 280px;
  font-size: 20px;
}

.scenario-grid small {
  display: flex;
  margin-top: auto;
  color: var(--teal-dark);
  align-items: center;
  gap: 7px;
  font-size: 11px;
  font-weight: 700;
}

.scenario-grid small .icon {
  width: 15px;
  height: 15px;
}

@media (max-width: 1120px) {
  .commercial-hero-copy {
    width: 66%;
  }

  .commercial-hero h1 {
    font-size: 54px;
  }

  .purchase-rail-grid {
    grid-template-columns: repeat(5, 1fr);
  }

  .purchase-label {
    display: none;
  }

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

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

  .loop-grid article:nth-child(3)::after {
    display: none;
  }

  .evidence-layout {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 44px;
  }

  .app-gallery {
    min-height: 600px;
  }

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

  .retest-panel {
    max-width: 680px;
  }
}

@media (max-width: 900px) {
  .commercial-hero {
    height: auto;
    min-height: 680px;
    padding: 86px 0 70px;
    background-position: 60% center;
  }

  .commercial-hero::before {
    background: rgba(4, 13, 18, 0.62);
  }

  .commercial-hero-copy {
    width: 76%;
  }

  .comparison-wrap,
  .evidence-layout,
  .baseline-layout,
  .wechat-business-layout {
    grid-template-columns: 1fr;
  }

  .comparison-title {
    max-width: 580px;
  }

  .evidence-layout,
  .baseline-layout,
  .wechat-business-layout {
    gap: 48px;
  }

  .app-gallery {
    width: min(100%, 620px);
  }

  .baseline-example {
    order: 2;
  }

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

  .radar-summary > div:nth-child(3) {
    border-right: 0;
  }

  .radar-summary > div:nth-child(-n + 3) {
    border-bottom: 1px solid var(--line);
  }

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

  .wechat-demo {
    margin-inline: auto;
  }

  .enterprise-architecture {
    grid-template-columns: 1fr;
  }

  .arch-arrow {
    width: 100%;
    height: 44px;
    transform: rotate(90deg);
  }

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

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

  .scenario-grid > a {
    min-height: 210px;
  }
}

@media (max-width: 640px) {
  .commercial-hero {
    min-height: 650px;
    padding: 60px 0 54px;
    background-position: 62% center;
  }

  .commercial-hero::before {
    background: rgba(4, 13, 18, 0.72);
  }

  .commercial-hero-copy {
    width: 100%;
  }

  .commercial-hero h1 {
    font-size: 39px;
  }

  .hero-value {
    font-size: 20px;
  }

  .hero-intro {
    font-size: 14px;
  }

  .commercial-proof {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .hero-caption {
    display: none;
  }

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

  .purchase-rail-grid > a {
    min-height: 84px;
    border-bottom: 1px solid var(--line);
  }

  .advantage-grid,
  .loop-grid,
  .radar-capability-grid,
  .package-grid,
  .security-strip,
  .pilot-timeline {
    grid-template-columns: 1fr;
  }

  .advantage-item {
    min-height: 280px;
  }

  .loop-grid article {
    min-height: 180px;
  }

  .loop-grid article::after {
    display: none;
  }

  .comparison-row {
    padding: 12px 8px;
    grid-template-columns: 0.62fr 0.9fr 1.35fr;
    gap: 7px;
    font-size: 10px;
  }

  .comparison-head {
    font-size: 9px;
  }

  .app-gallery {
    min-height: auto;
    padding: 14px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-rows: auto auto;
    gap: 10px;
  }

  .app-shot {
    aspect-ratio: 9 / 16;
  }

  .app-shot-main {
    grid-row: auto;
  }

  .app-shot-bottom {
    grid-column: 1 / 3;
    aspect-ratio: 16 / 9;
  }

  .app-shot-bottom img {
    object-position: center 28%;
  }

  .real-product-badge {
    top: 24px;
    left: 24px;
  }

  .baseline-chart,
  .package-card,
  .retest-panel {
    padding: 24px 20px;
  }

  .chart-caption {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }

  .radar-proof-head {
    grid-template-columns: 1fr;
    gap: 10px;
  }

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

  .radar-summary > div:nth-child(3) {
    border-right: 1px solid var(--line);
  }

  .radar-summary > div:nth-child(even) {
    border-right: 0;
  }

  .radar-summary > div {
    border-bottom: 1px solid var(--line);
  }

  .radar-panel {
    padding: 12px 10px;
    overflow-x: auto;
  }

  .radar-panel img {
    width: 880px;
    max-width: none;
    min-height: 168px;
  }

  .technical-note {
    flex-wrap: wrap;
  }

  .technical-note a {
    margin-left: 30px;
  }

  .intervention-methods {
    grid-template-columns: 1fr;
  }

  .intervention-methods article {
    min-height: 250px;
  }

  .method-icon {
    margin: 30px 0 28px;
  }

  .retest-metric {
    gap: 8px;
  }

  .retest-metric strong {
    font-size: 34px;
  }

  .learning-line {
    flex-wrap: wrap;
  }

  .wechat-demo-head,
  .chat-row {
    padding-right: 14px;
    padding-left: 14px;
  }

  .chat-action {
    margin-right: 44px;
    margin-left: 44px;
  }

  .package-head {
    padding-right: 0;
  }

  .package-head em {
    position: static;
    display: inline-block;
    margin-top: 10px;
  }

  .acceptance-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .acceptance-row strong {
    margin-right: 0;
    margin-bottom: 6px;
  }
}

.inner-hero.product-ring,
.inner-hero.delivery-hero {
  position: relative;
  background: #0d1a20 url("../images/ring-product-hd.webp") center center / cover no-repeat;
}

.inner-hero.product-ring::before,
.inner-hero.delivery-hero::before {
  position: absolute;
  inset: 0;
  content: "";
  background: rgba(5, 16, 20, 0.62);
}

.inner-hero.delivery-hero > .container {
  position: relative;
  z-index: 1;
}

.delivery-scope-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.delivery-scope-grid article {
  position: relative;
  min-height: 220px;
  padding: 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.delivery-scope-grid b {
  position: absolute;
  top: 24px;
  right: 24px;
  color: #b9c5c3;
  font-size: 11px;
}

.delivery-scope-grid .icon {
  margin: 18px 0 28px;
  color: var(--teal);
}

.delivery-scope-grid h3 {
  font-size: 18px;
}

.delivery-scope-grid p {
  color: var(--muted);
  font-size: 12px;
}

.deployment-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.deployment-grid article {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.deployment-grid .icon-wrap {
  display: grid;
  width: 46px;
  height: 46px;
  margin-bottom: 30px;
  border-radius: 6px;
  color: var(--teal-dark);
  background: var(--teal-soft);
  place-items: center;
}

.deployment-grid p {
  color: var(--muted);
  font-size: 13px;
}

.deployment-grid ul {
  padding: 0;
  margin: 22px 0 0;
  list-style: none;
}

.deployment-grid li {
  padding: 8px 0;
  border-top: 1px solid var(--line);
  color: var(--teal-dark);
  font-size: 11px;
  font-weight: 700;
}

.acceptance-table {
  border-top: 2px solid var(--ink);
}

.acceptance-table-row {
  display: grid;
  min-height: 72px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  grid-template-columns: 0.6fr 1.45fr 1fr;
  align-items: center;
  gap: 24px;
  font-size: 12px;
}

.acceptance-table-row span {
  color: var(--muted);
}

.acceptance-table-row.head {
  min-height: 48px;
  color: var(--muted);
  background: var(--mist);
  font-size: 11px;
  font-weight: 700;
}

.document-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.document-grid article {
  display: grid;
  min-height: 130px;
  padding: 24px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  grid-template-columns: auto 1fr;
  align-content: center;
  column-gap: 14px;
}

.document-grid .icon {
  grid-row: 1 / 3;
  color: var(--coral);
}

.document-grid strong {
  font-size: 14px;
}

.document-grid span {
  color: var(--muted);
  font-size: 11px;
}

.verified-screen {
  height: 680px;
  background: #eaf1f0;
}

.verified-screen img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: top center;
}

@media (max-width: 800px) {
  .delivery-scope-grid,
  .deployment-grid,
  .document-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .acceptance-table-row {
    grid-template-columns: 0.7fr 1.25fr 1fr;
    gap: 12px;
    font-size: 10px;
  }
}

@media (max-width: 560px) {
  .delivery-scope-grid,
  .deployment-grid,
  .document-grid {
    grid-template-columns: 1fr;
  }

  .acceptance-table-row {
    padding: 13px 8px;
    grid-template-columns: 0.64fr 1.08fr 1fr;
    gap: 6px;
    font-size: 9px;
  }

  .verified-screen {
    height: 520px;
  }
}