:root {
  color-scheme: light;
  --brand-blue: #244a9b;
  --brand-blue-dark: #0b1f4d;
  --brand-blue-soft: rgba(36, 74, 155, 0.1);
  --brand-orange: #e97835;
  --brand-orange-dark: #b84f21;
  --brand-orange-soft: rgba(233, 120, 53, 0.12);
  --ink: #111827;
  --ink-soft: #596476;
  --paper: #f7f6ef;
  --paper-strong: #fffdf8;
  --line: rgba(36, 74, 155, 0.16);
  --dark: #081735;
  --blue: var(--brand-blue);
  --cyan: #27b7d5;
  --gold: var(--brand-orange);
  --green: #4d8f7b;
  --shadow: 0 28px 84px rgba(8, 23, 53, 0.32);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  letter-spacing: 0;
  background: var(--dark) url("../../images/banner.jpg") center / cover fixed;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(135deg, rgba(8, 23, 53, 0.42), rgba(8, 23, 53, 0.88) 64%, rgba(233, 120, 53, 0.18)),
    radial-gradient(circle at 18% 18%, rgba(233, 120, 53, 0.22), transparent 34%);
}

a {
  color: inherit;
}

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

button,
input,
textarea {
  font: inherit;
}

.site-shell {
  width: min(1480px, calc(100% - clamp(16px, 4vw, 56px)));
  min-height: calc(100svh - clamp(16px, 4vw, 56px));
  margin: clamp(8px, 2vw, 28px) auto;
  overflow: clip;
  position: relative;
  background:
    linear-gradient(180deg, rgba(255, 253, 248, 0.96), rgba(244, 247, 255, 0.92) 52%, rgba(247, 246, 239, 0.98)),
    var(--paper);
  border: 1px solid rgba(255, 253, 248, 0.66);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  min-height: 74px;
  padding: 0 clamp(18px, 4vw, 58px);
  background: rgba(255, 253, 248, 0.9);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(18px);
  transition: border-color 180ms ease, box-shadow 180ms ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 10px 28px rgba(8, 23, 53, 0.1);
}

.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.brand-logo {
  display: block;
  width: clamp(142px, 12vw, 188px);
  max-height: 50px;
  object-fit: contain;
}

.site-nav {
  justify-self: center;
  display: inline-flex;
  align-items: center;
  gap: clamp(12px, 2.1vw, 34px);
  color: rgba(17, 24, 39, 0.74);
  font-size: 14px;
}

.site-nav a {
  position: relative;
  text-decoration: none;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -8px;
  height: 2px;
  background: var(--brand-orange);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 180ms ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  justify-self: end;
  width: 42px;
  aspect-ratio: 1;
  padding: 0;
  border: 1px solid rgba(36, 74, 155, 0.2);
  background: rgba(255, 253, 248, 0.76);
  border-radius: 8px;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--brand-blue-dark);
  border-radius: 999px;
}

.section-block {
  position: relative;
  padding: clamp(58px, 8vw, 118px) clamp(20px, 5vw, 78px);
}

.hero {
  display: grid;
  grid-template-columns: minmax(280px, 0.82fr) minmax(420px, 1.18fr);
  gap: clamp(26px, 5vw, 82px);
  align-items: center;
  min-height: clamp(590px, calc(100svh - 126px), 820px);
  padding-top: clamp(36px, 6vw, 74px);
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.hero h1,
.statement h2,
.section-heading h2,
.site-footer h2 {
  margin: 0;
  color: var(--ink);
  font-weight: 780;
  line-height: 1.04;
}

.hero h1 {
  max-width: 640px;
  font-size: clamp(44px, 6vw, 82px);
}

.lead {
  max-width: 620px;
  margin: 26px 0 0;
  color: var(--ink-soft);
  font-size: clamp(16px, 1.35vw, 20px);
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 24px;
  border: 1px solid var(--line);
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

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

.button-primary {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(112deg, #244a9b 0%, #244a9b 54%, #315aa5 74%, #e97835 100%);
  box-shadow: 0 14px 30px rgba(36, 74, 155, 0.22);
}

.button-secondary {
  color: var(--brand-blue);
  border-color: rgba(36, 74, 155, 0.24);
  background: rgba(255, 253, 248, 0.78);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  max-width: 470px;
  margin: 42px 0 0;
}

.hero-metrics div {
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.hero-metrics dt {
  margin: 0 0 4px;
  color: var(--brand-blue);
  font-size: clamp(22px, 3vw, 36px);
  font-weight: 780;
}

.hero-metrics dd {
  margin: 0;
  color: var(--ink-soft);
  font-size: 13px;
}

.hero-visual {
  position: relative;
  min-width: 0;
  margin: 0;
}

.hero-kinetic {
  aspect-ratio: 16 / 9;
  overflow: visible;
  filter: drop-shadow(0 30px 70px rgba(36, 74, 155, 0.22)) drop-shadow(0 10px 30px rgba(233, 120, 53, 0.12));
}

.kinetic-stage {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 360px;
  overflow: hidden;
  isolation: isolate;
  color: #fff;
  background:
    radial-gradient(circle at 82% 18%, rgba(88, 132, 255, 0.38), transparent 32%),
    radial-gradient(circle at 54% 86%, rgba(0, 8, 120, 0.42), transparent 34%),
    linear-gradient(135deg, #2444ff 0%, #1837f5 42%, #1230e5 100%);
  border-radius: 8px;
  user-select: none;
  touch-action: none;
  --letter-size: clamp(82px, 9.4vw, 148px);
}

.gravity-toggle {
  position: absolute;
  top: 14px;
  right: 14px;
  z-index: 42;
  display: none;
  min-height: 34px;
  padding: 0 13px;
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: 999px;
  color: #fff;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  background: rgba(8, 23, 53, 0.26);
  box-shadow: 0 12px 26px rgba(6, 18, 122, 0.22);
  backdrop-filter: blur(12px);
  cursor: pointer;
  touch-action: manipulation;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.gravity-toggle:hover,
.gravity-toggle:focus-visible,
.gravity-toggle.is-active {
  border-color: rgba(255, 255, 255, 0.72);
  background: rgba(233, 120, 53, 0.82);
  transform: translateY(-1px);
}

.gravity-toggle.is-unavailable {
  color: rgba(255, 255, 255, 0.76);
  border-color: rgba(255, 255, 255, 0.22);
  background: rgba(8, 23, 53, 0.34);
}

.hero-year {
  position: absolute;
  left: clamp(28px, 5vw, 54px);
  bottom: clamp(24px, 4.6vw, 46px);
  z-index: 35;
  display: grid;
  gap: 10px;
  pointer-events: none;
}

.hero-year span {
  color: #fff;
  font-size: clamp(28px, 3.2vw, 46px);
  font-weight: 780;
  line-height: 0.92;
  text-shadow:
    0 3px 0 rgba(6, 18, 122, 0.22),
    0 12px 26px rgba(5, 16, 96, 0.34),
    0 0 26px rgba(255, 255, 255, 0.2);
}

.hero-year i {
  display: block;
  width: clamp(160px, 17vw, 250px);
  height: clamp(6px, 0.62vw, 10px);
  background: #fff;
  box-shadow:
    0 3px 0 rgba(6, 18, 122, 0.22),
    0 12px 24px rgba(5, 16, 96, 0.32),
    0 0 22px rgba(255, 255, 255, 0.18);
}

.kinetic-letter {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 5;
  display: block;
  color: #fff;
  font-family: "HarmonyOS Sans", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  font-size: var(--letter-size);
  font-weight: 700;
  font-variation-settings: "wght" 700;
  line-height: 0.82;
  letter-spacing: 0;
  text-transform: uppercase;
  text-shadow: var(--letter-shadow, 0 10px 22px rgba(7, 19, 105, 0.18));
  transform: translate(-50%, -50%);
  transform-origin: 50% 55%;
  cursor: grab;
  will-change: transform;
  opacity: 0;
  pointer-events: auto;
}

.kinetic-letter:active {
  cursor: grabbing;
}

.kinetic-letter.is-dragging {
  cursor: grabbing;
  text-shadow: var(--letter-shadow, 0 16px 30px rgba(7, 19, 105, 0.3));
}

.scroll-cue {
  position: absolute;
  left: 50%;
  bottom: 24px;
  width: 36px;
  height: 36px;
  transform: translateX(-50%);
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.52);
}

.scroll-cue::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 11px;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  transform: translateX(-50%) rotate(45deg);
}

.section-rail {
  position: fixed;
  top: 50%;
  right: calc((100vw - min(1480px, calc(100vw - clamp(16px, 4vw, 56px)))) / 2 + 22px);
  z-index: 20;
  display: grid;
  gap: 12px;
  transform: translateY(-50%);
}

.section-rail a,
.rail-top-button {
  display: grid;
  place-items: center;
  width: 34px;
  aspect-ratio: 1;
  color: rgba(36, 74, 155, 0.62);
  border: 1px solid var(--line);
  border-radius: 999px;
  text-decoration: none;
  background: rgba(255, 253, 248, 0.72);
  backdrop-filter: blur(10px);
}

.rail-top-button {
  padding: 0;
  border-color: var(--brand-orange);
  color: #fff;
  background: var(--brand-orange);
  cursor: pointer;
  box-shadow: 0 12px 28px rgba(233, 120, 53, 0.28);
  transition: transform 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

.rail-top-button::before {
  content: "";
  width: 0;
  height: 0;
  border-right: 6px solid transparent;
  border-left: 6px solid transparent;
  border-bottom: 8px solid currentColor;
  transform: translateY(-1px);
}

.rail-top-button:hover,
.rail-top-button:focus-visible {
  background: var(--brand-orange-dark);
  box-shadow: 0 16px 34px rgba(233, 120, 53, 0.34);
  transform: translateY(-1px);
}

.section-rail span {
  font-size: 11px;
  font-weight: 700;
}

.section-rail a.is-active {
  color: #fff;
  border-color: var(--brand-orange);
  background: var(--brand-blue);
}

.statement {
  min-height: min(760px, 86svh);
  display: grid;
  align-items: end;
  overflow: hidden;
  color: #fff;
  background: var(--brand-blue-dark);
}

.statement::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(8, 23, 53, 0.82), rgba(8, 23, 53, 0.32) 62%, rgba(233, 120, 53, 0.18));
}

.statement-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.statement-content,
.proof-list {
  position: relative;
  z-index: 1;
}

.statement-content {
  max-width: 760px;
}

.statement .eyebrow {
  color: #ffd0b2;
}

.statement h2 {
  color: #fff;
  font-size: clamp(36px, 5.6vw, 76px);
}

.statement p:not(.eyebrow) {
  max-width: 620px;
  margin: 26px 0 0;
  color: rgba(255, 255, 255, 0.76);
  line-height: 1.8;
}

.proof-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0;
  margin: clamp(42px, 7vw, 76px) 0 0;
  list-style: none;
}

.proof-list li,
.service-tags span {
  padding: 10px 14px;
  border: 1px solid rgba(255, 208, 178, 0.36);
  border-radius: 999px;
  background: rgba(255, 253, 248, 0.14);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(180px, 0.5fr) minmax(280px, 1fr);
  gap: clamp(22px, 5vw, 72px);
  align-items: end;
  margin-bottom: clamp(32px, 5vw, 58px);
}

.section-heading .eyebrow {
  grid-column: 1 / -1;
  margin-bottom: -6px;
}

.section-heading h2 {
  font-size: clamp(38px, 6vw, 78px);
}

.section-heading p {
  max-width: 620px;
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.8;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.service-card {
  min-height: 360px;
  padding: clamp(20px, 3vw, 36px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 248, 0.72);
  transition: transform 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: rgba(36, 74, 155, 0.26);
  background: rgba(255, 253, 248, 0.94);
  box-shadow: 0 18px 34px rgba(36, 74, 155, 0.12);
}

.service-card img {
  width: min(168px, 58%);
  height: 150px;
  object-fit: contain;
  margin-bottom: clamp(26px, 4vw, 46px);
  filter: drop-shadow(0 20px 26px rgba(18, 21, 28, 0.16));
}

.service-card h3 {
  margin: 0 0 14px;
  font-size: clamp(20px, 2.2vw, 28px);
}

.service-card p {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.75;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.service-tags span {
  color: var(--ink-soft);
  border-color: var(--line);
  background: var(--brand-blue-soft);
}

.seo-answers {
  background: linear-gradient(180deg, rgba(244, 247, 255, 0.9), rgba(255, 247, 240, 0.78));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.answer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.answer-card {
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 248, 0.78);
}

.answer-card h3 {
  margin: 0 0 14px;
  color: var(--ink);
  font-size: clamp(18px, 1.7vw, 23px);
  line-height: 1.35;
}

.answer-card p {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.78;
}

.geo-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 16px;
  color: var(--ink-soft);
}

.geo-panel strong,
.geo-panel span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 253, 248, 0.72);
}

.geo-panel strong {
  color: #fff;
  border-color: var(--brand-orange);
  background: var(--brand-orange);
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.case-card {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  min-width: 0;
  padding: 0;
  border: 0;
  border-radius: 8px;
  color: #fff;
  background: var(--brand-blue-dark);
  cursor: pointer;
  aspect-ratio: 16 / 11;
}

.case-card::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, rgba(8, 23, 53, 0.04), rgba(8, 23, 53, 0.86));
}

.case-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.01);
  transition: transform 220ms ease, filter 220ms ease;
}

.case-card span {
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 14px;
  z-index: 2;
  text-align: left;
  font-weight: 700;
  line-height: 1.35;
}

.case-card:hover img,
.case-card:focus-visible img {
  transform: scale(1.06);
  filter: saturate(1.08);
}

.case-more {
  position: relative;
  display: flex;
  justify-content: center;
  margin-top: 34px;
}

.case-more__button {
  min-width: 232px;
  min-height: 42px;
  padding: 0 30px;
  border: 1px solid rgba(36, 74, 155, 0.24);
  border-radius: 999px;
  color: var(--brand-blue);
  font-weight: 800;
  letter-spacing: 0;
  background: rgba(255, 253, 248, 0.72);
  cursor: pointer;
  box-shadow: 0 16px 36px rgba(8, 23, 53, 0.08);
  transition: transform 180ms ease, border-color 180ms ease, color 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

.case-more__button:hover,
.case-more__button:focus-visible,
.case-more.is-open .case-more__button {
  color: #fff;
  border-color: var(--brand-orange);
  background: var(--brand-orange);
  box-shadow: 0 18px 42px rgba(233, 120, 53, 0.22);
  transform: translateY(-1px);
}

.case-more__panel {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 14px);
  z-index: 8;
  width: 166px;
  padding: 12px;
  color: var(--ink);
  border: 1px solid rgba(36, 74, 155, 0.16);
  border-radius: 8px;
  background: rgba(255, 253, 248, 0.98);
  box-shadow: 0 22px 54px rgba(8, 23, 53, 0.16);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 8px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.case-more__panel::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 100%;
  width: 12px;
  height: 12px;
  border-right: 1px solid rgba(36, 74, 155, 0.16);
  border-bottom: 1px solid rgba(36, 74, 155, 0.16);
  background: rgba(255, 253, 248, 0.98);
  transform: translate(-50%, -6px) rotate(45deg);
}

.case-more__panel img {
  width: 118px;
  height: 118px;
  margin: 0 auto;
  object-fit: contain;
  border-radius: 6px;
}

.case-more__panel span {
  display: block;
  margin-top: 8px;
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.35;
  text-align: center;
}

.case-more:hover .case-more__panel,
.case-more:focus-within .case-more__panel,
.case-more.is-open .case-more__panel {
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, 0);
}

.partners {
  background: rgba(244, 247, 255, 0.72);
}

.logo-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 10px;
}

.logo-grid img {
  display: block;
  width: 100%;
  height: 88px;
  padding: 12px 14px;
  object-fit: contain;
  object-position: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fffdf8;
  filter: none;
  transition: filter 180ms ease, background 180ms ease;
}

.logo-grid img:hover {
  background: #fff;
  filter: saturate(1.05);
}

.site-footer {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) minmax(240px, 0.7fr) auto;
  gap: clamp(24px, 5vw, 70px);
  align-items: start;
  padding: clamp(58px, 8vw, 100px) clamp(20px, 5vw, 78px) 34px;
  color: #fff;
  background:
    linear-gradient(135deg, rgba(11, 31, 77, 0.98), rgba(8, 23, 53, 0.98) 62%, rgba(184, 79, 33, 0.9)),
    var(--brand-blue-dark);
}

.site-footer .eyebrow {
  color: #ffd0b2;
}

.site-footer h2 {
  color: #fff;
  font-size: clamp(34px, 5vw, 66px);
}

.site-footer p {
  max-width: 620px;
  margin: 20px 0 0;
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.8;
}

.site-footer address {
  color: rgba(255, 255, 255, 0.74);
  font-style: normal;
  line-height: 1.9;
}

.site-footer address strong {
  color: #fff;
}

.site-footer address a {
  color: #fff;
  text-decoration: none;
}

.wechat-code {
  width: 110px;
  border-radius: 8px;
  background: #fff;
}

.copyright {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 22px;
  padding-top: 30px;
  color: rgba(255, 255, 255, 0.54);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 13px;
}

.copyright a {
  color: rgba(255, 255, 255, 0.82);
  text-decoration: none;
}

.video-modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: clamp(16px, 4vw, 48px);
  background: rgba(0, 0, 0, 0.82);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease;
}

.video-modal.is-open {
  opacity: 1;
  pointer-events: auto;
}

.video-modal__panel {
  position: relative;
  width: min(1100px, 100%);
  background: #000;
  border-radius: 8px;
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.48);
}

.video-modal video {
  width: 100%;
  max-height: 78svh;
  border-radius: 8px;
  background: #000;
}

.video-modal__close {
  position: absolute;
  top: -48px;
  right: 0;
  width: 40px;
  aspect-ratio: 1;
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  cursor: pointer;
}

.video-modal__close::before,
.video-modal__close::after {
  content: "";
  position: absolute;
  left: 11px;
  top: 19px;
  width: 18px;
  height: 2px;
  background: #fff;
}

.video-modal__close::before {
  transform: rotate(45deg);
}

.video-modal__close::after {
  transform: rotate(-45deg);
}

/* Baidu analytics may inject a consultation widget that covers the hero. */
.embed-icon,
.embed-invite {
  display: none !important;
}

[data-section] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 420ms ease, transform 420ms ease;
}

[data-section].is-visible {
  opacity: 1;
  transform: translateY(0);
}

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

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

@media (max-width: 1100px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero-visual {
    max-width: 820px;
  }

  .kinetic-stage {
    min-height: 310px;
  }

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

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

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

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

  .wechat-code {
    justify-self: start;
  }
}

@media (max-width: 820px) {
  body {
    background-attachment: scroll;
  }

  .site-shell {
    width: min(100%, calc(100% - 14px));
    margin: 7px auto;
    border-radius: 18px;
  }

  .site-header {
    min-height: 66px;
  }

  .site-nav {
    position: absolute;
    top: calc(100% - 1px);
    left: 14px;
    right: auto;
    width: calc(100% - 28px);
    display: grid;
    gap: 0;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.98);
    box-shadow: 0 20px 48px rgba(8, 23, 53, 0.18);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
  }

  .site-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav a {
    padding: 13px 10px;
  }

  .site-nav a::after {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .section-block {
    padding-inline: 18px;
  }

  .hero h1 {
    font-size: clamp(42px, 13vw, 64px);
  }

  .hero-copy {
    display: contents;
  }

  .hero-copy .eyebrow {
    order: 1;
  }

  .hero h1 {
    order: 2;
  }

  .hero-visual {
    order: 3;
    margin-top: 6px;
  }

  .lead {
    order: 4;
  }

  .hero-actions {
    order: 5;
  }

  .hero-metrics {
    order: 6;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    max-width: none;
    margin-top: 30px;
  }

  .hero-metrics div {
    padding: 14px 0;
  }

  .hero-kinetic {
    width: 100%;
  }

  .kinetic-stage {
    min-height: 260px;
    --letter-size: clamp(72px, 18vw, 118px);
  }

  .kinetic-stage.has-gravity-control .gravity-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .scroll-cue,
  .section-rail {
    display: none;
  }

  .statement {
    min-height: 640px;
  }

  .statement::after {
    background: linear-gradient(180deg, rgba(8, 23, 53, 0.18), rgba(8, 23, 53, 0.88));
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .service-grid,
  .answer-grid,
  .case-grid,
  .logo-grid,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .service-card {
    min-height: auto;
  }

  .service-card img {
    width: 118px;
    height: 112px;
  }

  .logo-grid img {
    height: 82px;
  }
}

@media (max-width: 520px) {
  .brand-logo {
    width: clamp(110px, 32vw, 136px);
    max-height: 40px;
  }

  .hero-actions {
    display: grid;
  }

  .button {
    width: 100%;
  }

  .case-grid {
    gap: 10px;
  }

  .case-more {
    margin-top: 24px;
  }

  .case-more__button {
    width: min(100%, 260px);
  }

  .kinetic-stage {
    min-height: 230px;
    --letter-size: clamp(58px, 16vw, 84px);
  }

  .hero-year {
    left: 20px;
    bottom: 20px;
  }

  .hero-year i {
    width: 124px;
  }

}