:root {
  --navy-950: #061a36;
  --navy-900: #082854;
  --navy-800: #0b376f;
  --blue-600: #1769b0;
  --blue-100: #dceaf6;
  --ice-50: #f5f8fb;
  --steel-100: #e3e9ef;
  --steel-300: #b9c5d0;
  --ink-900: #14233a;
  --ink-700: #34445a;
  --ink-500: #657489;
  --heat-500: #ef8528;
  --brand-red: #d71920;
  --white: #ffffff;
  --shadow: 0 24px 64px rgba(9, 34, 71, 0.16);
  --radius: 14px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink-900);
  background: var(--ice-50);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  line-height: 1.65;
}

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

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

a {
  color: inherit;
}

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

:focus-visible {
  outline: 3px solid rgba(239, 133, 40, 0.85);
  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;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 82px;
  padding: 12px clamp(22px, 5vw, 78px);
  color: var(--ink-900);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 10px 34px rgba(10, 38, 80, 0.08);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 58px;
  height: 44px;
  place-items: center;
  background: transparent;
}

.brand-mark img {
  width: 52px;
  height: auto;
  filter: brightness(0) saturate(100%) invert(14%) sepia(96%) saturate(4974%) hue-rotate(352deg) brightness(95%) contrast(96%);
}

.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand-copy strong {
  font-size: 20px;
  letter-spacing: 0.02em;
}

.brand-copy small {
  margin-top: 5px;
  color: var(--ink-500);
  font-size: 11px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: clamp(16px, 2.2vw, 34px);
}

.main-nav a {
  color: var(--ink-700);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}

.main-nav a:hover {
  color: var(--blue-600);
}

.main-nav .nav-phone {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 16px;
  border-radius: 10px;
  color: var(--white);
  background: var(--navy-900);
}

.nav-phone svg,
.button svg,
.text-action svg,
.selector-next svg,
.demo-notice svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.menu-button {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 0;
  border-radius: 10px;
  color: var(--navy-900);
  background: var(--blue-100);
}

.menu-button svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
}

.hero {
  display: grid;
  min-height: calc(100vh - 82px);
  grid-template-columns: minmax(0, 56%) minmax(0, 44%);
  color: var(--white);
  background: var(--navy-900);
}

.hero-copy {
  position: relative;
  z-index: 2;
  display: flex;
  min-width: 0;
  padding: clamp(58px, 7vw, 102px) clamp(28px, 6vw, 92px) 64px;
  flex-direction: column;
  justify-content: center;
}

.hero h1 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(42px, 4.9vw, 76px);
  font-weight: 720;
  letter-spacing: -0.035em;
  line-height: 1.14;
}

.hero-lead {
  max-width: 680px;
  margin: 28px 0 0;
  color: #dceaf5;
  font-size: clamp(17px, 1.4vw, 21px);
  line-height: 1.85;
}

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

.button {
  display: inline-flex;
  min-height: 48px;
  padding: 12px 22px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border: 0;
  border-radius: 10px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
}

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

.button-primary {
  color: var(--navy-950);
  background: var(--white);
  box-shadow: 0 14px 32px rgba(3, 17, 37, 0.24);
}

.button-secondary {
  color: var(--white);
  background: var(--navy-800);
}

.selector {
  width: min(720px, 100%);
  margin-top: clamp(48px, 6vw, 76px);
  padding: 24px;
  border-radius: var(--radius);
  color: var(--ink-900);
  background: var(--white);
  box-shadow: var(--shadow);
}

.selector-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
}

.selector-head h2 {
  margin: 0;
  font-size: 19px;
}

.selector-head span {
  color: var(--ink-500);
  font-size: 12px;
}

.device-tabs {
  display: grid;
  margin-top: 18px;
  grid-template-columns: 1fr 1fr;
  background: var(--ice-50);
}

.device-tab {
  min-height: 48px;
  border: 0;
  color: var(--ink-700);
  background: transparent;
  font-weight: 700;
  cursor: pointer;
}

.device-tab.is-active {
  color: var(--white);
  background: var(--blue-600);
}

.selector-output {
  display: grid;
  min-height: 78px;
  padding: 18px 0 4px;
  grid-template-columns: minmax(180px, 0.9fr) minmax(260px, 1.1fr);
  align-items: center;
  gap: 18px;
}

.selector-output p {
  margin: 0;
  color: var(--ink-700);
  font-size: 14px;
  font-weight: 600;
}

.power-options {
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
}

.power-option {
  min-width: 66px;
  padding: 8px 10px;
  border: 1px solid var(--steel-300);
  border-radius: 9px;
  color: var(--ink-700);
  background: var(--white);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.power-option.is-selected {
  border-color: var(--heat-500);
  color: #7a3700;
  background: #fff1e3;
}

.selector-next {
  display: inline-flex;
  margin-top: 13px;
  align-items: center;
  gap: 7px;
  color: var(--blue-600);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.selector-next svg,
.text-action svg {
  width: 16px;
  height: 16px;
}

.hero-visual {
  position: relative;
  min-height: 680px;
  margin: 0;
  overflow: hidden;
  background: #1d2938;
}

.hero-visual::after {
  position: absolute;
  inset: 0;
  content: "";
  background: linear-gradient(90deg, rgba(8, 40, 84, 0.34), transparent 34%);
  pointer-events: none;
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 61% center;
}

.hero-visual figcaption {
  position: absolute;
  right: clamp(20px, 4vw, 48px);
  bottom: 34px;
  z-index: 2;
  display: flex;
  padding: 14px 18px;
  border-radius: 12px;
  flex-direction: column;
  color: var(--ink-900);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 18px 46px rgba(6, 26, 54, 0.24);
}

.hero-visual figcaption strong {
  font-size: 14px;
}

.hero-visual figcaption span {
  color: var(--ink-500);
  font-size: 12px;
}

.fact-strip {
  display: grid;
  padding: 0 clamp(22px, 6vw, 92px);
  grid-template-columns: repeat(4, 1fr);
  color: var(--white);
  background: var(--navy-950);
}

.fact-strip div {
  display: flex;
  min-height: 114px;
  padding: 24px clamp(16px, 2.4vw, 36px);
  border-right: 1px solid rgba(255, 255, 255, 0.14);
  flex-direction: column;
  justify-content: center;
}

.fact-strip div:first-child {
  border-left: 1px solid rgba(255, 255, 255, 0.14);
}

.fact-strip strong {
  font-size: clamp(19px, 1.7vw, 26px);
}

.fact-strip span {
  margin-top: 4px;
  color: #b7c9dc;
  font-size: 13px;
}

.section {
  padding: clamp(84px, 9vw, 142px) clamp(22px, 6vw, 92px);
}

.section-heading {
  display: grid;
  max-width: 1200px;
  margin: 0 auto clamp(46px, 6vw, 78px);
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  align-items: end;
  gap: 44px;
}

.section-heading h2 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(34px, 4vw, 60px);
  font-weight: 720;
  letter-spacing: -0.035em;
  line-height: 1.2;
}

.section-heading p {
  max-width: 620px;
  margin: 0;
  color: var(--ink-500);
  font-size: 17px;
}

.solutions {
  background: var(--white);
}

.solution-block {
  display: grid;
  max-width: 1200px;
  min-height: 560px;
  margin: 0 auto;
  grid-template-columns: 0.9fr 1.1fr;
  overflow: hidden;
  color: var(--white);
  background: var(--navy-900);
  box-shadow: var(--shadow);
}

.solution-block + .solution-block {
  margin-top: 34px;
}

.solution-block figure {
  position: relative;
  min-height: 480px;
  margin: 0;
  overflow: hidden;
  background: #d9e1e8;
}

.solution-block figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.solution-block figure figcaption {
  position: absolute;
  right: 18px;
  bottom: 18px;
  padding: 9px 12px;
  border-radius: 9px;
  color: var(--ink-900);
  background: rgba(255, 255, 255, 0.92);
  font-size: 12px;
}

.solution-copy {
  display: flex;
  padding: clamp(36px, 5vw, 72px);
  flex-direction: column;
  justify-content: center;
}

.solution-copy h3 {
  margin: 0;
  font-size: clamp(30px, 3vw, 46px);
  letter-spacing: -0.03em;
  line-height: 1.25;
}

.solution-copy > p {
  max-width: 590px;
  margin: 24px 0 0;
  color: #c9d9e8;
  font-size: 16px;
}

.spec-list {
  margin: 34px 0 0;
}

.spec-list div {
  display: grid;
  padding: 15px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  grid-template-columns: 90px 1fr;
  gap: 18px;
}

.spec-list dt {
  color: #9eb9d1;
  font-size: 13px;
}

.spec-list dd {
  margin: 0;
  font-weight: 700;
}

.text-action {
  display: inline-flex;
  width: fit-content;
  margin-top: 30px;
  padding: 0;
  border: 0;
  align-items: center;
  gap: 7px;
  color: #ffb16f;
  background: transparent;
  font-weight: 700;
  cursor: pointer;
}

.solution-plasma {
  color: var(--ink-900);
  background: var(--blue-100);
}

.solution-plasma .solution-copy > p,
.solution-plasma .spec-list dt {
  color: var(--ink-500);
}

.solution-plasma .spec-list div {
  border-color: rgba(20, 35, 58, 0.14);
}

.solution-plasma .text-action {
  color: var(--blue-600);
}

.solution-plasma figure img {
  object-fit: contain;
  background: #f5f7fa;
}

.evidence {
  color: var(--white);
  background: var(--navy-950);
}

.section-heading-light p {
  color: #b7c9dc;
}

.evidence-grid {
  display: grid;
  max-width: 1200px;
  margin: 0 auto;
  grid-template-columns: 1.3fr 0.7fr;
  grid-template-rows: repeat(2, minmax(280px, 1fr));
  gap: 14px;
}

.evidence-grid figure {
  position: relative;
  min-height: 300px;
  margin: 0;
  overflow: hidden;
  background: #19283b;
}

.evidence-grid .evidence-wide {
  grid-row: 1 / 3;
}

.evidence-grid img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 650ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.evidence-grid figure:hover img {
  transform: scale(1.025);
}

.evidence-grid figcaption {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  display: flex;
  padding: 50px 24px 22px;
  flex-direction: column;
  background: linear-gradient(transparent, rgba(6, 26, 54, 0.88));
}

.evidence-grid figcaption strong {
  font-size: 17px;
}

.evidence-grid figcaption span {
  color: #c8d7e5;
  font-size: 13px;
}

.process {
  background: var(--ice-50);
}

.process-list {
  display: grid;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0;
  grid-template-columns: repeat(4, 1fr);
  list-style: none;
  counter-reset: process;
}

.process-list li {
  position: relative;
  min-height: 220px;
  padding: 70px 28px 28px;
  border-top: 3px solid var(--steel-300);
  counter-increment: process;
}

.process-list li::before {
  position: absolute;
  top: -23px;
  left: 28px;
  display: grid;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  place-items: center;
  color: var(--white);
  background: var(--blue-600);
  content: counter(process);
  font-weight: 800;
  box-shadow: 0 10px 24px rgba(23, 105, 176, 0.24);
}

.process-list strong,
.process-list span {
  display: block;
}

.process-list strong {
  font-size: 19px;
}

.process-list span {
  margin-top: 10px;
  color: var(--ink-500);
  font-size: 14px;
}

.inquiry {
  display: grid;
  padding: clamp(72px, 8vw, 126px) clamp(22px, 6vw, 92px);
  grid-template-columns: minmax(300px, 0.72fr) minmax(560px, 1.28fr);
  gap: clamp(44px, 7vw, 104px);
  color: var(--white);
  background: var(--navy-900);
}

.inquiry-intro {
  align-self: start;
}

.inquiry-intro h2 {
  margin: 0;
  font-size: clamp(36px, 4vw, 58px);
  letter-spacing: -0.035em;
  line-height: 1.18;
}

.inquiry-intro > p {
  margin: 26px 0 0;
  color: #c9d9e8;
  font-size: 16px;
}

.direct-contact {
  display: flex;
  margin-top: 46px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  flex-direction: column;
  gap: 6px;
}

.direct-contact span {
  color: #9eb9d1;
  font-size: 13px;
}

.direct-contact a {
  width: fit-content;
  font-size: 19px;
  font-weight: 700;
  text-decoration: none;
}

.inquiry-form {
  padding: clamp(26px, 4vw, 48px);
  border-radius: var(--radius);
  color: var(--ink-900);
  background: var(--white);
  box-shadow: var(--shadow);
}

.demo-notice {
  display: flex;
  width: fit-content;
  padding: 9px 12px;
  border-radius: 9px;
  align-items: center;
  gap: 8px;
  color: #77400e;
  background: #fff0df;
  font-size: 13px;
  font-weight: 700;
}

.form-grid {
  display: grid;
  margin-top: 26px;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-grid label {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-grid label > span {
  color: var(--ink-700);
  font-size: 13px;
  font-weight: 700;
}

.form-grid input,
.form-grid select,
.form-grid textarea {
  width: 100%;
  border: 1px solid var(--steel-300);
  border-radius: 10px;
  color: var(--ink-900);
  background: #fbfcfe;
}

.form-grid input,
.form-grid select {
  min-height: 48px;
  padding: 0 13px;
}

.form-grid textarea {
  min-height: 120px;
  padding: 12px 13px;
  resize: vertical;
}

.form-grid input::placeholder,
.form-grid textarea::placeholder {
  color: #7b8797;
}

.form-grid input:focus,
.form-grid select:focus,
.form-grid textarea:focus {
  border-color: var(--blue-600);
  outline: 3px solid rgba(23, 105, 176, 0.16);
}

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

.form-actions {
  display: flex;
  margin-top: 26px;
  align-items: center;
  gap: 18px;
}

.button-submit {
  flex: 0 0 auto;
  color: var(--white);
  background: var(--blue-600);
  box-shadow: 0 14px 32px rgba(23, 105, 176, 0.24);
}

.form-actions p {
  margin: 0;
  color: var(--ink-500);
  font-size: 12px;
}

.form-actions p.is-error {
  color: #a03420;
  font-weight: 700;
}

.form-actions p.is-success {
  color: #176b3d;
  font-weight: 700;
}

.site-footer {
  display: flex;
  min-height: 130px;
  padding: 34px clamp(22px, 6vw, 92px);
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  color: #c0cfdd;
  background: var(--navy-950);
}

.site-footer div {
  display: flex;
  flex-direction: column;
}

.site-footer strong {
  color: var(--white);
}

.site-footer span,
.site-footer p {
  margin: 4px 0 0;
  font-size: 12px;
}

.site-footer .footer-meta {
  align-items: flex-end;
}

.site-footer a {
  margin-top: 6px;
  color: #c0cfdd;
  font-size: 12px;
  text-decoration: none;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--white);
  text-decoration: underline;
}

.mobile-actions {
  display: none;
}

@media (max-width: 1120px) {
  .hero {
    grid-template-columns: minmax(0, 60%) minmax(0, 40%);
  }

  .hero-copy {
    padding-inline: 5vw;
  }

  .selector-output {
    grid-template-columns: 1fr;
  }

  .solution-block {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 900px) {
  .topbar {
    min-height: 72px;
  }

  .menu-button {
    display: block;
  }

  .main-nav {
    position: absolute;
    top: calc(100% + 8px);
    right: 18px;
    left: 18px;
    display: none;
    padding: 18px;
    border-radius: 12px;
    flex-direction: column;
    align-items: stretch;
    background: var(--white);
    box-shadow: var(--shadow);
  }

  .main-nav.is-open {
    display: flex;
  }

  .main-nav a {
    padding: 10px 8px;
  }

  .main-nav .nav-phone {
    justify-content: center;
  }

  .hero {
    min-height: 0;
    grid-template-columns: 1fr;
  }

  .hero-copy {
    padding: 68px 5vw 50px;
  }

  .hero-visual {
    min-height: 480px;
  }

  .fact-strip {
    grid-template-columns: 1fr 1fr;
  }

  .fact-strip div:nth-child(odd) {
    border-left: 1px solid rgba(255, 255, 255, 0.14);
  }

  .section-heading,
  .solution-block,
  .inquiry {
    grid-template-columns: 1fr;
  }

  .solution-plasma figure {
    order: 2;
  }

  .solution-plasma .solution-copy {
    order: 1;
  }

  .evidence-grid {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 470px 300px;
  }

  .evidence-grid .evidence-wide {
    grid-column: 1 / -1;
    grid-row: auto;
  }

  .process-list {
    grid-template-columns: 1fr 1fr;
    gap: 46px 0;
  }

  .inquiry {
    gap: 48px;
  }
}

@media (max-width: 620px) {
  body {
    padding-bottom: 62px;
  }

  .topbar {
    padding-inline: 16px;
  }

  .brand-mark {
    width: 48px;
    height: 40px;
  }

  .brand-mark img {
    width: 39px;
  }

  .brand-copy strong {
    font-size: 17px;
  }

  .brand-copy small {
    display: none;
  }

  .hero-copy {
    padding: 54px 20px 38px;
  }

  .hero h1 {
    font-size: clamp(39px, 12vw, 54px);
  }

  .hero-lead {
    margin-top: 22px;
    font-size: 16px;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .button {
    padding-inline: 14px;
    font-size: 14px;
  }

  .selector {
    margin-top: 42px;
    padding: 20px;
  }

  .selector-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }

  .device-tabs {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 380px;
  }

  .hero-visual figcaption {
    right: 14px;
    bottom: 14px;
  }

  .fact-strip {
    padding-inline: 16px;
  }

  .fact-strip div {
    min-height: 100px;
    padding: 18px 12px;
  }

  .fact-strip strong {
    font-size: 17px;
  }

  .fact-strip span {
    font-size: 11px;
  }

  .section {
    padding: 72px 18px;
  }

  .section-heading {
    margin-bottom: 38px;
    gap: 20px;
  }

  .section-heading h2 {
    font-size: 34px;
  }

  .section-heading p {
    font-size: 15px;
  }

  .solution-block {
    min-height: 0;
  }

  .solution-copy {
    padding: 36px 24px;
  }

  .solution-copy h3 {
    font-size: 30px;
  }

  .solution-block figure {
    min-height: 360px;
  }

  .spec-list div {
    grid-template-columns: 74px 1fr;
  }

  .evidence-grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }

  .evidence-grid .evidence-wide {
    grid-column: auto;
  }

  .evidence-grid figure {
    min-height: 350px;
  }

  .process-list {
    grid-template-columns: 1fr;
    gap: 38px;
  }

  .process-list li {
    min-height: 170px;
  }

  .inquiry {
    padding: 72px 18px;
    grid-template-columns: 1fr;
  }

  .inquiry-form {
    padding: 24px 18px;
  }

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

  .form-grid .field-wide {
    grid-column: auto;
  }

  .form-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .site-footer {
    padding: 34px 20px;
    align-items: flex-start;
    flex-direction: column;
  }

  .site-footer .footer-meta {
    align-items: flex-start;
  }

  .mobile-actions {
    position: fixed;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 50;
    display: grid;
    height: 62px;
    grid-template-columns: 1fr 1fr;
    background: var(--white);
    box-shadow: 0 -8px 28px rgba(6, 26, 54, 0.14);
  }

  .mobile-actions a {
    display: grid;
    place-items: center;
    color: var(--navy-900);
    font-weight: 800;
    text-decoration: none;
  }

  .mobile-actions a:last-child {
    color: var(--white);
    background: var(--blue-600);
  }
}

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

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