:root {
  --ink: #101828;
  --navy: #071a2f;
  --deep: #031120;
  --blue: #0867b4;
  --cyan: #1ed6f3;
  --red: #d91f2f;
  --gold: #d6a85b;
  --muted: #667085;
  --line: #e5ebf3;
  --soft: #f5f8fb;
  --white: #ffffff;
  --shadow: 0 30px 90px rgba(7, 26, 47, 0.16);
}

.quick-access-section {
  padding: 68px max(24px, calc((100vw - 1220px) / 2 + 24px));
  color: var(--white);
  background:
    linear-gradient(120deg, rgba(3, 17, 32, 0.96), rgba(0, 92, 180, 0.82)),
    url("media/workshop.jpg") center / cover no-repeat;
}

.quick-access-inner {
  display: grid;
  grid-template-columns: minmax(220px, 0.28fr) minmax(0, 0.72fr);
  gap: 34px;
  align-items: start;
  width: min(1220px, 100%);
  margin: 0 auto;
}

.quick-access-section h2 {
  margin-bottom: 0;
  color: var(--white);
}

.quick-access-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.quick-access-grid a {
  display: grid;
  gap: 8px;
  min-height: 112px;
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: var(--white);
  background: rgba(255, 255, 255, 0.1);
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.18);
  backdrop-filter: blur(14px);
}

.quick-access-grid a:hover {
  border-color: rgba(30, 214, 243, 0.62);
  background: rgba(255, 255, 255, 0.16);
}

.quick-access-grid span {
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

.quick-access-grid strong {
  font-size: 18px;
  line-height: 1.35;
}

body.modal-open {
  overflow: hidden;
}

.modal-section {
  position: fixed !important;
  inset: 0;
  z-index: 320;
  display: none !important;
  width: auto;
  height: auto;
  padding: clamp(76px, 8vw, 108px) max(22px, calc((100vw - 1220px) / 2 + 24px)) 42px !important;
  overflow-y: auto;
  background:
    radial-gradient(circle at 14% 10%, rgba(30, 214, 243, 0.18), transparent 28%),
    linear-gradient(135deg, rgba(3, 17, 32, 0.9), rgba(7, 26, 47, 0.76)) !important;
  backdrop-filter: blur(16px);
}

.modal-section.is-modal-open {
  display: block !important;
}

.modal-section.is-modal-open.platform-section,
.modal-section.is-modal-open.patent-section,
.modal-section.is-modal-open.factory-section,
.modal-section.is-modal-open.video-section,
.modal-section.is-modal-open.contact-section {
  display: grid !important;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(24px, 4vw, 58px);
  align-items: center;
}

.modal-section.is-modal-open > :not(.modal-close) {
  position: relative;
  z-index: 1;
}

.modal-section .modal-close {
  display: none !important;
}

.modal-global-close {
  position: fixed;
  right: clamp(18px, 4vw, 46px);
  top: 22px;
  z-index: 420;
  display: none;
  align-items: center;
  justify-content: center;
  min-width: 92px;
  height: 42px;
  padding: 0 16px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  color: var(--white);
  background: rgba(3, 17, 32, 0.82);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.24);
  cursor: pointer;
  font-weight: 900;
}

.modal-global-close.is-visible {
  display: flex;
}

.modal-global-close:hover,
.modal-global-close:focus-visible {
  border-color: rgba(30, 214, 243, 0.8);
  outline: none;
}

.modal-section.platform-section,
.modal-section.patent-section,
.modal-section.factory-section,
.modal-section.video-section,
.modal-section.service-section,
.modal-section.news-section,
.modal-section.contact-section {
  color: var(--ink);
}

.modal-section.platform-section > :not(.modal-close),
.modal-section.patent-section > :not(.modal-close),
.modal-section.factory-section > :not(.modal-close),
.modal-section.video-section > :not(.modal-close),
.modal-section.service-section > :not(.modal-close),
.modal-section.news-section > :not(.modal-close),
.modal-section.contact-section > :not(.modal-close) {
  background: rgba(255, 255, 255, 0.96);
}

.modal-section.platform-section > :not(.modal-close),
.modal-section.patent-section > :not(.modal-close),
.modal-section.factory-section > :not(.modal-close),
.modal-section.video-section > :not(.modal-close) {
  padding: clamp(20px, 3vw, 34px);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.22);
}

.modal-section.platform-section .platform-visual,
.modal-section.factory-section .factory-media {
  background: transparent;
  box-shadow: none;
}

.modal-section.service-section > .service-heading,
.modal-section.news-section > .news-heading {
  margin-bottom: 24px;
  padding: 28px;
  box-shadow: 0 20px 56px rgba(0, 0, 0, 0.18);
}

.modal-section.service-section > .certificate-panel {
  background:
    linear-gradient(90deg, rgba(3, 17, 32, 0.96), rgba(3, 17, 32, 0.84)),
    url("media/workshop.jpg") center / cover no-repeat;
}

.modal-section.service-section .service-grid,
.modal-section.news-section .news-grid {
  margin: 0 auto;
}

.modal-section.service-chain-section .service-chain-inner,
.modal-section.system-flow > * {
  width: min(1220px, 100%);
  margin-left: auto;
  margin-right: auto;
}

.modal-section.system-flow .section-title,
.modal-section.system-flow .solution-intro,
.modal-section.system-flow .solution-process {
  color: var(--white);
}

.modal-section.system-flow .section-title h2,
.modal-section.system-flow .solution-intro {
  color: var(--white);
}

.modal-section.system-flow .solution-intro {
  margin-top: 0;
}

.modal-section.contact-section > :not(.modal-close) {
  padding: 28px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.22);
}

@media (max-width: 960px) {
  .quick-access-inner {
    grid-template-columns: 1fr;
  }

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

  .modal-section.is-modal-open.platform-section,
  .modal-section.is-modal-open.patent-section,
  .modal-section.is-modal-open.factory-section,
  .modal-section.is-modal-open.video-section,
  .modal-section.is-modal-open.contact-section {
    display: block !important;
  }

  .modal-section > :not(.modal-close) + :not(.modal-close) {
    margin-top: 18px;
  }
}

@media (max-width: 620px) {
  .quick-access-section {
    padding: 56px 18px;
  }

  .quick-access-grid {
    grid-template-columns: 1fr;
  }

  .modal-section {
    padding: 72px 18px 28px !important;
  }

  .modal-global-close {
    right: 18px;
    top: 16px;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 118px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Microsoft YaHei", "Segoe UI", Arial, sans-serif;
  line-height: 1.65;
  overflow-x: hidden;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.86);
  border-bottom: 1px solid rgba(229, 235, 243, 0.68);
  box-shadow: 0 16px 46px rgba(7, 26, 47, 0.06);
  backdrop-filter: blur(18px);
}

.quick-contact-bar {
  position: fixed;
  right: 14px;
  top: 50%;
  z-index: 45;
  display: grid;
  gap: 12px;
  transform: translateY(-50%);
}

.quick-contact-bar a {
  display: grid;
  gap: 5px;
  width: 86px;
  min-height: 74px;
  place-items: center;
  padding: 10px 8px;
  border: 1px solid rgba(229, 235, 243, 0.9);
  color: var(--navy);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 16px 40px rgba(7, 26, 47, 0.14);
  backdrop-filter: blur(12px);
  transition: transform 0.25s ease, background 0.25s ease, color 0.25s ease;
}

.quick-contact-bar a:hover {
  color: var(--white);
  background: var(--blue);
  transform: translateX(-4px);
}

.quick-contact-bar span {
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
}

.quick-contact-bar strong {
  font-size: 13px;
  line-height: 1.2;
  text-align: center;
}

.topline,
.nav-shell,
.section,
.contact-section,
.site-footer {
  width: min(1220px, 100%);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.topline {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-top: 8px;
  padding-bottom: 8px;
  color: var(--muted);
  font-size: 13px;
}

.topline a {
  color: var(--navy);
  font-weight: 800;
}

.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding-top: 18px;
  padding-bottom: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 340px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  color: var(--white);
  background: var(--red);
  font-size: 18px;
  font-weight: 900;
  line-height: 1;
}

.brand-lines {
  display: grid;
  gap: 2px;
}

.brand-lines strong {
  color: var(--navy);
  font-size: 22px;
  line-height: 1.1;
}

.brand-lines small {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.2;
  text-transform: uppercase;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 1.4vw, 22px);
  color: var(--navy);
  font-size: 14px;
  font-weight: 800;
}

.main-nav > a,
.nav-trigger {
  position: relative;
  padding: 8px 0;
}

.nav-trigger {
  border: 0;
  color: inherit;
  background: transparent;
  font: inherit;
  cursor: pointer;
}

.main-nav > a::after,
.nav-trigger::after {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--red);
  content: "";
  transition: width 0.2s ease;
}

.main-nav > a:hover::after,
.nav-trigger:hover::after,
.nav-item.is-open .nav-trigger::after {
  width: 100%;
}

.nav-item {
  position: relative;
}

.nav-dropdown {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  z-index: 60;
  display: grid;
  min-width: 178px;
  padding: 12px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 24px 60px rgba(7, 26, 47, 0.16);
  backdrop-filter: blur(22px) saturate(160%);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 8px);
  transition: opacity 0.16s ease, transform 0.16s ease;
}

.nav-dropdown::before {
  position: absolute;
  left: 0;
  right: 0;
  top: -12px;
  height: 12px;
  content: "";
}

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

.nav-dropdown a {
  padding: 9px 12px;
  border-radius: 4px;
  color: var(--navy);
  white-space: nowrap;
}

.nav-dropdown a:hover {
  color: var(--blue);
  background: rgba(8, 103, 180, 0.08);
}

.menu-button {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
}

.menu-button span {
  display: block;
  width: 21px;
  height: 2px;
  margin: 5px auto;
  background: var(--navy);
}

.hero {
  position: relative;
  min-height: 590px;
  overflow: hidden;
  color: var(--white);
  background: var(--deep);
}

.hero-slider,
.hero-slide {
  position: absolute;
  inset: 0;
}

.hero-slide {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.7s ease;
}

.hero-slide::after {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 78% 22%, rgba(30, 214, 243, 0.15), transparent 32%),
    linear-gradient(180deg, rgba(3, 17, 32, 0), rgba(3, 17, 32, 0.86));
  content: "";
}

.hero-slide.is-active {
  opacity: 1;
  pointer-events: auto;
}

.hero-slide-one {
  background:
    linear-gradient(90deg, rgba(3, 17, 32, 0.92), rgba(3, 17, 32, 0.64) 45%, rgba(3, 17, 32, 0.22)),
    url("media/hero-factory.jpg") center / cover no-repeat;
}

.hero-slide-two {
  background:
    linear-gradient(90deg, rgba(3, 17, 32, 0.88), rgba(3, 17, 32, 0.58) 48%, rgba(3, 17, 32, 0.18)),
    url("media/workshop.jpg") center / cover no-repeat;
}

.hero-slide-three {
  background:
    linear-gradient(90deg, rgba(3, 17, 32, 0.9), rgba(3, 17, 32, 0.58) 48%, rgba(3, 17, 32, 0.24)),
    url("media/platform-poster.jpg") center / cover no-repeat;
}

.hero-inner {
  position: relative;
  z-index: 2;
  width: min(1220px, 100%);
  margin: 0 auto;
  padding: 88px 24px 150px;
}

.eyebrow,
.section-kicker,
.section-title span {
  display: block;
  margin: 0 0 12px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 900px;
  margin-bottom: 28px;
  font-size: clamp(40px, 5.4vw, 68px);
  line-height: 1.04;
  letter-spacing: 0;
}

.mobile-break {
  display: none;
}

h2 {
  margin-bottom: 18px;
  color: var(--navy);
  font-size: clamp(32px, 4.4vw, 56px);
  line-height: 1.15;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  color: var(--navy);
  font-size: 22px;
  line-height: 1.28;
}

.hero-slide h2 {
  max-width: 940px;
  margin-bottom: 28px;
  color: var(--white);
  font-size: clamp(38px, 5.2vw, 60px);
  line-height: 1.06;
}

.hero-text {
  max-width: 760px;
  color: rgba(255, 255, 255, 0.86);
  font-size: 19px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 11px 22px;
  border-radius: 4px;
  font-weight: 900;
}

.btn.primary {
  background: var(--red);
  color: var(--white);
}

.btn.ghost {
  border: 1px solid rgba(255, 255, 255, 0.65);
  color: var(--white);
}

.btn.light {
  border: 1px solid #c8d6e7;
  color: var(--navy);
  background: var(--white);
}

.hero-dots {
  position: absolute;
  left: max(24px, calc((100vw - 1220px) / 2 + 24px));
  bottom: 130px;
  z-index: 4;
  display: flex;
  gap: 10px;
}

.hero-dots button {
  width: 42px;
  height: 4px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.42);
  cursor: pointer;
  transition: width 0.2s ease, background 0.2s ease;
}

.hero-dots button.is-active {
  width: 58px;
  background: var(--red);
}

.standard-ribbon {
  position: absolute;
  right: max(24px, calc((100vw - 1220px) / 2 + 24px));
  bottom: 28px;
  display: grid;
  gap: 8px;
  min-width: min(520px, calc(100% - 48px));
  color: rgba(255, 255, 255, 0.8);
  font-size: 13px;
}

.standard-ribbon span {
  padding: 9px 14px;
  border-left: 3px solid var(--cyan);
  background: rgba(255, 255, 255, 0.08);
}

.section {
  padding-top: 108px;
  padding-bottom: 108px;
}

.manifesto {
  max-width: 1220px;
  text-align: left;
}

.manifesto p,
.solution-intro {
  color: var(--muted);
  font-size: 18px;
}

.about-lead {
  max-width: 940px;
  margin: 0 auto;
  text-align: center;
}

.about-proof-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
  margin-top: 44px;
}

.about-proof-grid article {
  min-height: 148px;
  padding: 24px 18px;
  border-top: 3px solid var(--blue);
  background: var(--soft);
}

.about-proof-grid strong {
  display: block;
  margin-bottom: 12px;
  color: var(--navy);
  font-size: 34px;
  line-height: 1;
}

.about-proof-grid span {
  color: var(--muted);
  font-weight: 800;
}

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

.about-culture article {
  padding: 26px;
  border: 1px solid var(--line);
  background: var(--white);
  box-shadow: 0 18px 48px rgba(7, 26, 47, 0.06);
}

.about-culture h3 {
  margin-bottom: 8px;
}

.about-culture p {
  margin-bottom: 0;
  font-size: 16px;
}

.platform-section {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(420px, 0.9fr);
  gap: 58px;
  align-items: center;
  padding: 104px max(24px, calc((100vw - 1220px) / 2 + 24px));
  color: var(--white);
  background:
    radial-gradient(circle at 85% 15%, rgba(30, 214, 243, 0.18), transparent 34%),
    linear-gradient(135deg, #06172b, #071d36 55%, #020b15);
}

.platform-copy h2,
.platform-copy p {
  color: var(--white);
}

.platform-copy p {
  color: rgba(255, 255, 255, 0.78);
  font-size: 18px;
}

.capability-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.capability-list span,
.partner-points span {
  padding: 9px 14px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: rgba(255, 255, 255, 0.86);
}

.platform-visual {
  margin: 0;
  box-shadow: 0 36px 100px rgba(0, 0, 0, 0.36);
}

.platform-visual img {
  width: 100%;
  height: auto;
}

.section-title {
  max-width: 820px;
  margin-bottom: 46px;
}

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

.flow-grid article {
  min-height: 260px;
  padding: 30px;
  background: var(--white);
}

.flow-grid strong {
  display: block;
  margin-bottom: 36px;
  color: var(--blue);
  font-size: 40px;
  line-height: 1;
}

.flow-grid p,
.patent-list p,
.product-copy p,
.section-title + p {
  color: var(--muted);
}

.solution-intro {
  max-width: 880px;
  margin: -68px 0 34px auto;
}

.solution-scenarios {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin-top: 34px;
}

.solution-scenarios article {
  position: relative;
  min-height: 248px;
  padding: 28px;
  overflow: hidden;
  color: var(--white);
  background:
    linear-gradient(145deg, rgba(7, 26, 47, 0.98), rgba(8, 103, 180, 0.82)),
    var(--navy);
}

.solution-scenarios article::after {
  position: absolute;
  right: -34px;
  bottom: -42px;
  width: 120px;
  height: 120px;
  border: 1px solid rgba(30, 214, 243, 0.32);
  border-radius: 50%;
  content: "";
}

.solution-scenarios span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  margin-bottom: 26px;
  color: var(--cyan);
  border: 1px solid rgba(30, 214, 243, 0.42);
  font-weight: 900;
}

.solution-scenarios h3,
.solution-scenarios p {
  color: var(--white);
}

.solution-scenarios p {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.76);
}

.solution-process {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 22px;
  padding: 18px;
  background: var(--soft);
}

.solution-process span {
  position: relative;
  padding: 10px 18px;
  color: var(--navy);
  background: var(--white);
  font-weight: 900;
  box-shadow: 0 10px 26px rgba(7, 26, 47, 0.06);
}

.solution-process span:not(:last-child)::after {
  margin-left: 10px;
  color: var(--blue);
  content: ">";
}

.patent-section {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 60px;
  padding: 110px max(24px, calc((100vw - 1220px) / 2 + 24px));
  background: var(--soft);
}

.patent-copy p {
  color: var(--muted);
  font-size: 18px;
}

.patent-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.patent-list article {
  padding: 28px;
  border-top: 3px solid var(--red);
  background: var(--white);
  box-shadow: 0 18px 50px rgba(7, 26, 47, 0.08);
}

.patent-list span {
  display: block;
  margin-bottom: 16px;
  color: var(--blue);
  font-weight: 900;
}

.factory-section {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: center;
  padding: 112px max(24px, calc((100vw - 1220px) / 2 + 24px));
}

.factory-media {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 18px;
}

.factory-media img {
  width: 100%;
  height: 520px;
  object-fit: cover;
}

.factory-media img:first-child {
  margin-top: 70px;
}

.factory-copy p {
  color: var(--muted);
  font-size: 18px;
}

.factory-stats {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.factory-stats span {
  display: flex;
  align-items: baseline;
  gap: 14px;
  color: var(--muted);
}

.factory-stats strong {
  color: var(--blue);
  font-size: 34px;
}

.factory-honors {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.factory-honors span {
  padding: 9px 12px;
  border: 1px solid var(--line);
  color: var(--navy);
  background: var(--soft);
  font-size: 13px;
  font-weight: 900;
}

.service-chain-section {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background:
    linear-gradient(120deg, rgba(3, 17, 32, 0.96), rgba(0, 98, 191, 0.8)),
    url("media/workshop.jpg") center / cover no-repeat;
}

.service-chain-section::before {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 34px 34px;
  content: "";
  mask-image: linear-gradient(90deg, transparent, #000 18%, #000 82%, transparent);
}

.service-chain-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 0.42fr) minmax(0, 0.58fr);
  gap: 48px;
  align-items: center;
  width: min(1220px, 100%);
  margin: 0 auto;
  padding: 92px 24px;
}

.chain-copy h2 {
  margin-bottom: 18px;
  color: var(--white);
}

.chain-copy p:last-child {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 18px;
}

.chain-board {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.chain-board::before {
  position: absolute;
  left: 50%;
  top: 10%;
  bottom: 10%;
  width: 1px;
  background: linear-gradient(180deg, transparent, rgba(30, 214, 243, 0.72), transparent);
  content: "";
}

.chain-board article {
  position: relative;
  min-height: 190px;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.1);
  box-shadow: 0 24px 50px rgba(0, 0, 0, 0.18);
  backdrop-filter: blur(16px);
}

.chain-board article::after {
  position: absolute;
  right: 18px;
  top: 18px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 26px rgba(30, 214, 243, 0.8);
  content: "";
}

.chain-board span {
  display: inline-grid;
  width: 36px;
  height: 36px;
  margin-bottom: 18px;
  place-items: center;
  color: var(--cyan);
  background: rgba(3, 17, 32, 0.56);
  font-weight: 900;
}

.chain-board h3 {
  margin-bottom: 10px;
  color: var(--white);
  font-size: 22px;
}

.chain-board p {
  margin: 0;
  color: rgba(255, 255, 255, 0.74);
}

.products {
  width: 100%;
  max-width: none;
  background: var(--soft);
}

.products > * {
  width: min(1220px, 100%);
  margin-left: auto;
  margin-right: auto;
}

.product-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 46px;
  align-items: stretch;
}

.product-grid figure {
  margin: 0;
}

.product-grid img {
  width: 100%;
  height: 100%;
  min-height: 560px;
  object-fit: cover;
}

.product-copy {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.product-copy article {
  padding: 30px;
  background: var(--white);
  border-left: 4px solid var(--blue);
}

.product-copy article h3 {
  font-size: 28px;
}

.product-copy article p {
  font-size: 17px;
}

.product-reserve {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  align-items: center;
  padding: 18px 22px;
  border: 1px dashed #b8c9dc;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.58);
}

.product-reserve strong {
  color: var(--navy);
}

.product-overview-more {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: max-content;
  min-height: 46px;
  padding: 10px 18px;
  color: var(--white);
  background: var(--blue);
  box-shadow: 0 14px 34px rgba(8, 103, 180, 0.24);
  font-weight: 900;
}

.product-overview-more:hover {
  background: #045493;
}

.product-detail {
  margin-top: 58px;
}

.product-detail.modal-section {
  margin-top: 0;
  color: var(--white);
}

.product-detail.modal-section .detail-heading h3,
.product-detail.modal-section .detail-title-row h3 {
  color: var(--white);
}

.product-detail.modal-section .detail-heading p {
  color: rgba(255, 255, 255, 0.76);
}

.product-detail.modal-section .detail-more {
  border-color: rgba(30, 214, 243, 0.44);
  color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

.product-detail.modal-section .product-library {
  padding: 28px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 26px 70px rgba(0, 0, 0, 0.22);
}

.product-detail.modal-section .legacy-product-dump {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.96);
}

.detail-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.62fr) minmax(360px, 0.38fr);
  gap: 34px;
  align-items: end;
  margin-bottom: 26px;
}

.detail-heading span {
  grid-column: 1;
  display: block;
  margin-bottom: 8px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.detail-heading h3 {
  grid-column: 1;
  margin-bottom: 0;
  font-size: 34px;
}

.detail-heading p {
  grid-column: 2;
  grid-row: 1 / span 2;
  margin-bottom: 0;
  color: var(--muted);
}

.detail-title-row {
  grid-column: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

.detail-title-row h3 {
  grid-column: auto;
  margin-bottom: 0;
}

.detail-more {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 7px 12px;
  border: 1px solid #c8d6e7;
  color: var(--blue);
  background: var(--white);
  font-weight: 900;
}

.product-compact-showcase {
  display: grid;
  gap: 26px;
}

#product-focus,
#product-library {
  scroll-margin-top: 150px;
}

.infinair-product-board {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 360px);
  gap: 16px;
  padding: 30px;
  color: var(--white);
  background:
    linear-gradient(135deg, rgba(0, 0, 0, 0.96), rgba(3, 17, 32, 0.94)),
    radial-gradient(circle at 26% 12%, rgba(30, 214, 243, 0.18), transparent 34%);
  box-shadow: 0 30px 80px rgba(7, 26, 47, 0.2);
}

.product-stage-area {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.focus-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.focus-device {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.42fr) minmax(300px, 0.58fr);
  min-height: 360px;
  overflow: hidden;
  color: var(--white);
  background:
    linear-gradient(135deg, rgba(3, 17, 32, 0.96), rgba(5, 42, 74, 0.9)),
    radial-gradient(circle at 80% 18%, rgba(30, 214, 243, 0.24), transparent 34%);
  box-shadow: 0 24px 62px rgba(7, 26, 47, 0.16);
}

.infinair-product-board .focus-device {
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: none;
}

.infinair-product-board .focus-device + .focus-device {
  min-height: 300px;
}

.focus-device::before {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(90deg, transparent, #000 22%, #000 78%, transparent);
  content: "";
}

.focus-copy {
  position: relative;
  z-index: 2;
  display: grid;
  align-content: end;
  gap: 12px;
  padding: 30px;
}

.focus-copy span {
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

.focus-copy h4 {
  margin: 0;
  color: var(--white);
  font-size: 30px;
  line-height: 1.18;
}

.focus-copy p {
  margin: 0;
  color: rgba(255, 255, 255, 0.74);
}

.assembly-stage {
  position: relative;
  z-index: 2;
  min-height: 318px;
  margin: 24px 24px 24px 0;
  overflow: hidden;
  isolation: isolate;
  perspective: 900px;
  background:
    radial-gradient(circle at center, rgba(30, 214, 243, 0.22), transparent 38%),
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    rgba(255, 255, 255, 0.05);
  background-size: auto, 26px 26px, 26px 26px, auto;
}

.product-switch-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.product-switch-card {
  display: grid;
  align-content: start;
  gap: 8px;
  min-height: 118px;
  padding: 18px;
  color: rgba(255, 255, 255, 0.82);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease;
}

.product-switch-card:hover,
.product-switch-card.is-active {
  border-color: rgba(30, 214, 243, 0.46);
  background: rgba(8, 103, 180, 0.48);
  transform: translateY(-4px);
}

.product-switch-card span {
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
}

.product-switch-card strong {
  color: var(--white);
  font-size: 18px;
  line-height: 1.25;
}

.product-switch-card small {
  color: rgba(255, 255, 255, 0.62);
  font-size: 12px;
  line-height: 1.5;
}

.product-switch-card.reserved {
  background: rgba(255, 255, 255, 0.05);
}

.product-side-panel {
  display: grid;
  gap: 14px;
  align-content: start;
  min-width: 0;
}

.product-side-panel figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: var(--deep);
}

.product-side-panel img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  opacity: 0.86;
  transition: transform 0.7s ease, opacity 0.7s ease;
}

.product-side-panel figure:hover img {
  opacity: 1;
  transform: scale(1.06);
}

.product-side-panel figcaption {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 16px;
  color: var(--white);
  font-size: 16px;
  font-weight: 900;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.45);
}

.side-case-stack {
  display: grid;
  gap: 10px;
}

.side-case-stack a {
  display: grid;
  grid-template-columns: 108px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  min-height: 88px;
  padding: 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.07);
}

.side-case-stack img {
  width: 108px;
  height: 68px;
  object-fit: cover;
  opacity: 1;
}

.side-case-stack span {
  color: var(--white);
  font-size: 15px;
  font-weight: 900;
  line-height: 1.35;
}

.product-side-list {
  display: grid;
  gap: 0;
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.06);
}

.product-side-list h4 {
  margin: 0;
  padding: 8px 10px 14px;
  color: var(--white);
  font-size: 18px;
}

.product-side-list a {
  display: grid;
  gap: 4px;
  padding: 14px 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.product-side-list span {
  color: var(--cyan);
  font-size: 12px;
  font-weight: 900;
}

.product-side-list strong {
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
  line-height: 1.45;
}

.product-side-more {
  display: flex;
  justify-content: space-between;
  min-height: 48px;
  align-items: center;
  padding: 0 16px;
  color: var(--white);
  background: var(--blue);
  font-weight: 900;
}

.assembly-stage::after {
  position: absolute;
  left: 8%;
  right: 8%;
  top: 16%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(30, 214, 243, 0.84), transparent);
  box-shadow: 0 0 28px rgba(30, 214, 243, 0.5);
  content: "";
  animation: scanSweep 4.6s ease-in-out infinite;
}

.scan-ring {
  position: absolute;
  inset: 14%;
  border: 1px solid rgba(30, 214, 243, 0.4);
  border-radius: 50%;
  animation: orbitGlow 7s linear infinite;
}

.scan-ring::before,
.scan-ring::after {
  position: absolute;
  inset: 14%;
  border: 1px dashed rgba(255, 255, 255, 0.32);
  border-radius: inherit;
  content: "";
}

.scan-ring::after {
  inset: -14%;
}

.assembly-ghost {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 1;
  width: min(72%, 340px);
  max-height: 68%;
  object-fit: contain;
  opacity: 0.22;
  filter: grayscale(1) brightness(1.4) drop-shadow(0 0 22px rgba(30, 214, 243, 0.3));
  transform: translate(-50%, -50%);
  animation: ghostExplode 7.2s ease-in-out infinite;
}

.explode-part {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 3;
  display: block;
  border: 1px solid rgba(30, 214, 243, 0.68);
  background: linear-gradient(145deg, rgba(30, 214, 243, 0.18), rgba(255, 255, 255, 0.08));
  box-shadow:
    inset 0 0 18px rgba(255, 255, 255, 0.1),
    0 0 30px rgba(30, 214, 243, 0.18);
  transform: translate(-50%, -50%);
  animation: explodeAssemble 7.2s ease-in-out infinite;
  animation-delay: var(--delay, 0s);
}

.fan-assembly .fan-shell {
  width: 212px;
  height: 118px;
  border-radius: 70px 26px 26px 70px;
  --dx: -110px;
  --dy: -36px;
  --rot: -7deg;
}

.fan-assembly .fan-rotor {
  width: 112px;
  height: 112px;
  border-radius: 50%;
  background:
    radial-gradient(circle at center, rgba(239, 35, 50, 0.38) 0 20%, transparent 21%),
    conic-gradient(from 20deg, rgba(239, 35, 50, 0.42), rgba(30, 214, 243, 0.18), rgba(239, 35, 50, 0.42));
  --dx: 104px;
  --dy: -16px;
  --rot: 22deg;
  --delay: 0.12s;
}

.fan-assembly .fan-motor {
  width: 74px;
  height: 54px;
  border-radius: 8px;
  --dx: -74px;
  --dy: 86px;
  --rot: 5deg;
  --delay: 0.24s;
}

.fan-assembly .fan-base {
  width: 186px;
  height: 20px;
  top: 66%;
  border-radius: 999px;
  --dx: 88px;
  --dy: 92px;
  --rot: -3deg;
  --delay: 0.36s;
}

.damper-assembly .damper-frame {
  width: 190px;
  height: 168px;
  border-width: 10px;
  background: rgba(255, 255, 255, 0.08);
  --dx: -98px;
  --dy: -54px;
  --rot: -3deg;
}

.damper-assembly .damper-blade {
  width: 158px;
  height: 16px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.2), rgba(30, 214, 243, 0.24));
}

.damper-assembly .damper-blade-one {
  top: 47%;
  --dx: 82px;
  --dy: -36px;
  --rot: 13deg;
  --delay: 0.14s;
}

.damper-assembly .damper-blade-two {
  top: 56%;
  --dx: 86px;
  --dy: 42px;
  --rot: -13deg;
  --delay: 0.26s;
}

.damper-assembly .damper-actuator {
  width: 70px;
  height: 58px;
  border-radius: 8px;
  background: linear-gradient(145deg, rgba(239, 35, 50, 0.3), rgba(30, 214, 243, 0.12));
  --dx: 126px;
  --dy: -92px;
  --rot: 5deg;
  --delay: 0.38s;
}

.damper-assembly .damper-temp {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  --dx: -124px;
  --dy: 92px;
  --rot: -18deg;
  --delay: 0.5s;
}

.connector-line {
  position: absolute;
  z-index: 2;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(30, 214, 243, 0.85), transparent);
  box-shadow: 0 0 18px rgba(30, 214, 243, 0.45);
  opacity: 0.68;
  transform-origin: left center;
  animation: connectorBreathe 7.2s ease-in-out infinite;
}

.fan-assembly .connector-one,
.damper-assembly .connector-one {
  left: 16%;
  top: 32%;
  width: 48%;
  transform: rotate(14deg);
}

.fan-assembly .connector-two,
.damper-assembly .connector-two {
  left: 22%;
  bottom: 28%;
  width: 54%;
  transform: rotate(-11deg);
}

.assembly-status {
  position: absolute;
  left: 18px;
  bottom: 18px;
  z-index: 5;
  color: rgba(255, 255, 255, 0.62);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.assembly-product {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 4;
  width: min(76%, 360px);
  max-height: 74%;
  object-fit: contain;
  filter: drop-shadow(0 24px 36px rgba(0, 0, 0, 0.42));
  transform: translate(-50%, -50%);
  animation: productFloat 5.6s ease-in-out infinite;
}

.part-tag {
  position: absolute;
  z-index: 6;
  padding: 8px 11px;
  border: 1px solid rgba(30, 214, 243, 0.54);
  color: var(--white);
  background: rgba(3, 17, 32, 0.72);
  box-shadow: 0 0 28px rgba(30, 214, 243, 0.16);
  font-size: 13px;
  font-weight: 900;
  animation: partPulse 4s ease-in-out infinite;
}

.part-one {
  left: 10%;
  top: 17%;
}

.part-two {
  right: 10%;
  top: 20%;
  animation-delay: 0.4s;
}

.part-three {
  left: 8%;
  bottom: 18%;
  animation-delay: 0.8s;
}

.part-four {
  right: 12%;
  bottom: 16%;
  animation-delay: 1.2s;
}

.product-library {
  padding: 26px;
  border-top: 3px solid var(--blue);
  background: var(--white);
  box-shadow: 0 18px 52px rgba(7, 26, 47, 0.08);
}

.library-heading {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
  margin-bottom: 18px;
}

.library-heading span {
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

.library-heading h4 {
  margin: 0;
  color: var(--navy);
  font-size: 28px;
  line-height: 1.2;
}

.library-groups {
  display: grid;
  gap: 12px;
}

.library-group {
  border: 1px solid var(--line);
  background: var(--white);
}

.library-group summary {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
  padding: 18px 20px;
  color: var(--navy);
  cursor: pointer;
  list-style: none;
}

.library-group summary::-webkit-details-marker {
  display: none;
}

.library-group summary span {
  font-size: 20px;
  font-weight: 900;
}

.library-group summary strong {
  color: var(--blue);
  font-size: 14px;
}

.library-card-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
  padding: 0 20px 20px;
}

.library-card {
  min-width: 0;
  padding: 10px;
  border: 1px solid var(--line);
  background: var(--soft);
}

.library-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: var(--white);
}

.library-card h5 {
  margin: 10px 0 0;
  color: var(--navy);
  font-size: 14px;
  line-height: 1.35;
  text-align: center;
}

.legacy-product-dump {
  display: none !important;
}

@keyframes productFloat {
  0%,
  100% {
    transform: translate(-50%, -50%) scale(1);
  }

  50% {
    transform: translate(-50%, -53%) scale(1.03);
  }
}

@keyframes explodeAssemble {
  0%,
  16%,
  100% {
    opacity: 0.34;
    transform: translate(-50%, -50%) rotate(0deg) scale(0.92);
  }

  38%,
  68% {
    opacity: 0.95;
    transform: translate(calc(-50% + var(--dx)), calc(-50% + var(--dy))) rotate(var(--rot)) scale(1);
  }

  82% {
    opacity: 0.5;
    transform: translate(-50%, -50%) rotate(0deg) scale(0.96);
  }
}

@keyframes ghostExplode {
  0%,
  18%,
  100% {
    opacity: 0.12;
    transform: translate(-50%, -50%) scale(0.98);
  }

  42%,
  66% {
    opacity: 0.34;
    transform: translate(-50%, calc(-50% - 42px)) scale(1.07);
  }
}

@keyframes connectorBreathe {
  0%,
  18%,
  100% {
    opacity: 0.26;
  }

  42%,
  68% {
    opacity: 0.88;
  }
}

@keyframes orbitGlow {
  to {
    transform: rotate(360deg);
  }
}

@keyframes scanSweep {
  0%,
  100% {
    top: 18%;
    opacity: 0.36;
  }

  50% {
    top: 76%;
    opacity: 1;
  }
}

@keyframes partPulse {
  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-8px);
  }
}

@keyframes caseTicker {
  to {
    transform: translateX(-50%);
  }
}

.threec-showcase {
  margin-bottom: 24px;
  padding: 30px;
  border-top: 3px solid var(--blue);
  background: var(--white);
  box-shadow: 0 18px 52px rgba(7, 26, 47, 0.08);
}

.threec-head {
  display: grid;
  grid-template-columns: minmax(0, 0.62fr) minmax(320px, 0.38fr);
  gap: 28px;
  align-items: end;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.threec-head span {
  display: block;
  margin-bottom: 8px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

.threec-head h4 {
  margin: 0;
  color: var(--navy);
  font-size: 32px;
  line-height: 1.18;
}

#threecTitle {
  scroll-margin-top: 190px;
}

.threec-head p {
  grid-column: 2;
  grid-row: 1 / span 2;
  margin: 0;
  color: var(--muted);
}

.threec-groups {
  display: grid;
  gap: 28px;
  margin-top: 28px;
}

.product-gallery-group {
  display: grid;
  gap: 18px;
}

.gallery-group-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--blue);
}

.gallery-group-head h5 {
  position: relative;
  margin: 0;
  padding-left: 18px;
  color: var(--navy);
  font-size: 20px;
  line-height: 1.25;
}

.gallery-group-head h5::before {
  position: absolute;
  left: 0;
  top: 7px;
  width: 10px;
  height: 10px;
  background: var(--blue);
  content: "";
}

.gallery-group-head span {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.product-category-feature {
  display: grid;
  grid-template-columns: minmax(280px, 0.78fr) minmax(0, 1.22fr);
  gap: 24px;
  align-items: stretch;
  padding: 18px;
  border: 1px solid var(--line);
  background: linear-gradient(90deg, rgba(245, 248, 251, 0.94), rgba(255, 255, 255, 0.98));
}

.category-hero-photo {
  margin: 0;
  min-width: 0;
  background: var(--white);
}

.category-hero-photo img {
  width: 100%;
  height: 100%;
  min-height: 260px;
  object-fit: cover;
  border: 1px solid var(--line);
}

.category-quick-card {
  display: grid;
  align-content: center;
  gap: 14px;
  min-width: 0;
  padding: 8px 0 8px 22px;
  border-left: 4px solid var(--blue);
}

.catalog-code {
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
  line-height: 1;
  text-transform: uppercase;
}

.category-quick-card h6 {
  margin: 0;
  color: var(--navy);
  font-size: 26px;
  line-height: 1.18;
}

.product-spec-list {
  display: grid;
  gap: 0;
  margin: 0;
}

.product-spec-list div {
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr);
  gap: 16px;
  padding: 10px 0;
  border-top: 1px solid rgba(200, 214, 231, 0.82);
}

.product-spec-list dt {
  color: var(--navy);
  font-weight: 900;
}

.product-spec-list dd {
  margin: 0;
  color: var(--muted);
}

.feature-chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
}

.feature-chip-list li {
  padding: 6px 10px;
  border: 1px solid #c8d6e7;
  color: var(--navy);
  background: rgba(255, 255, 255, 0.66);
  font-size: 13px;
  font-weight: 800;
}

.product-photo-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px 26px;
}

.product-photo-grid figure {
  display: grid;
  gap: 10px;
  margin: 0;
  min-width: 0;
}

.product-photo-grid img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--line);
  background: var(--soft);
}

.product-photo-grid figcaption {
  color: var(--navy);
  font-size: 14px;
  font-weight: 800;
  line-height: 1.35;
  text-align: center;
}

.product-family-grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1.28fr);
  gap: 18px;
}

.product-family-grid-secondary {
  grid-template-columns: minmax(0, 1.32fr) minmax(280px, 0.68fr);
  align-items: start;
}

.product-family {
  display: grid;
  gap: 20px;
  align-content: start;
  padding: 28px;
  border-top: 3px solid var(--blue);
  background: var(--white);
  box-shadow: 0 14px 38px rgba(7, 26, 47, 0.06);
}

.terminal-family {
  grid-row: span 2;
}

.product-family-grid-secondary .terminal-family {
  grid-row: auto;
}

.reserved-family {
  border-top-color: var(--cyan);
  background: rgba(255, 255, 255, 0.72);
}

.family-head {
  display: grid;
  gap: 8px;
}

.family-head span {
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

.family-head h4 {
  margin: 0;
  color: var(--navy);
  font-size: 28px;
  line-height: 1.25;
}

.reserved-family p {
  margin-bottom: 0;
  color: var(--muted);
}

.subfamily-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.subfamily-grid section {
  padding: 22px;
  background: var(--soft);
}

.subfamily-grid h5 {
  margin: 0 0 14px;
  color: var(--navy);
  font-size: 20px;
  line-height: 1.25;
}

.product-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.product-list li {
  position: relative;
  padding: 10px 0 10px 18px;
  border-bottom: 1px dashed #c8d6e7;
  color: var(--ink);
  font-weight: 700;
}

.product-list li::before {
  position: absolute;
  left: 0;
  color: var(--blue);
  content: "-";
}

.product-list li:last-child {
  border-bottom: 0;
}

.partner-section {
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(3, 17, 32, 0.94), rgba(3, 17, 32, 0.72)),
    url("media/team-flag.jpg") center / cover no-repeat;
}

.partner-inner {
  width: min(1040px, 100%);
  margin: 0 auto;
  padding: 118px 24px;
}

.partner-inner h2,
.partner-inner p {
  color: var(--white);
}

.partner-inner p {
  max-width: 780px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 18px;
}

.partner-points {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.case-section {
  position: relative;
  overflow: hidden;
  color: var(--ink);
  background:
    radial-gradient(circle at 18% 0, rgba(30, 214, 243, 0.16), transparent 30%),
    linear-gradient(180deg, #eef9f7 0%, #f7fbfb 100%);
}

.case-section::before {
  position: absolute;
  left: -120px;
  top: -180px;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: rgba(73, 203, 176, 0.12);
  content: "";
}

.case-inner {
  position: relative;
  z-index: 1;
  width: min(1220px, 100%);
  margin: 0 auto;
  padding: 92px 24px;
}

.case-heading {
  display: grid;
  gap: 8px;
  margin-bottom: 32px;
}

.case-heading .eyebrow {
  margin-bottom: 0;
}

.case-heading h2 {
  margin-bottom: 0;
  color: var(--navy);
}

.case-heading p:last-child {
  max-width: 820px;
  margin: 0;
  color: var(--muted);
  font-size: 18px;
}

.case-feature-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
  margin-bottom: 20px;
}

.case-feature-row article {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 18px;
  min-height: 150px;
  align-items: center;
  padding: 18px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 18px 46px rgba(7, 26, 47, 0.08);
}

.case-feature-row img {
  width: 150px;
  height: 96px;
  object-fit: cover;
  border-radius: 2px;
}

.case-feature-row p {
  display: -webkit-box;
  margin: 0 0 10px;
  overflow: hidden;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.case-feature-row strong {
  color: var(--ink);
  font-size: 13px;
  line-height: 1.45;
}

.case-logo-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
  margin-top: 20px;
}

.case-logo-grid span {
  display: grid;
  min-height: 88px;
  place-items: center;
  padding: 12px;
  border: 1px solid rgba(207, 224, 226, 0.9);
  border-radius: 6px;
  color: var(--navy);
  background: var(--white);
  box-shadow: 0 10px 24px rgba(7, 26, 47, 0.06);
  font-size: 15px;
  font-weight: 900;
  text-align: center;
}

.case-source-note {
  margin: 16px 0 0;
  color: rgba(76, 96, 119, 0.78);
  font-size: 12px;
  line-height: 1.8;
}

.case-source-note a {
  margin-left: 10px;
  color: rgba(0, 92, 180, 0.86);
  font-weight: 800;
}

.video-section {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: 56px;
  align-items: center;
  padding: 112px max(24px, calc((100vw - 1220px) / 2 + 24px));
}

.video-copy p {
  color: var(--muted);
  font-size: 18px;
}

.video-section video {
  width: 100%;
  background: var(--navy);
  box-shadow: var(--shadow);
}

.service-section {
  padding: 104px max(24px, calc((100vw - 1220px) / 2 + 24px));
  background: var(--soft);
}

#service,
#fan-selection,
#app-download,
#cloud-guide,
#function-intro,
#certificate-query,
#about,
#solutions,
#cases,
#product-focus,
#product-library,
#threec-products,
#ventilation-products,
#ac-terminal-products,
#company-news,
#tech-news,
#industry-news {
  scroll-margin-top: 140px;
}

.service-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.62fr) minmax(360px, 0.38fr);
  gap: 34px;
  align-items: end;
  margin-bottom: 34px;
}

.service-heading .eyebrow {
  grid-column: 1;
  margin-bottom: 8px;
}

.service-heading h2 {
  grid-column: 1;
  margin-bottom: 0;
}

.service-heading p:last-child {
  grid-column: 2;
  grid-row: 1 / span 2;
  margin: 0;
  color: var(--muted);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.service-card {
  display: grid;
  align-content: start;
  gap: 14px;
  min-height: 260px;
  padding: 28px;
  border-top: 3px solid var(--blue);
  background: var(--white);
  box-shadow: 0 14px 38px rgba(7, 26, 47, 0.06);
}

.service-card span {
  color: var(--blue);
  font-size: 34px;
  font-weight: 900;
  line-height: 1;
}

.service-card h3 {
  margin-bottom: 0;
}

.service-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.service-card a {
  align-self: end;
  color: var(--blue);
  font-weight: 900;
}

.certificate-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 370px);
  gap: 32px;
  align-items: center;
  margin-top: 22px;
  padding: 30px;
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(3, 17, 32, 0.96), rgba(3, 17, 32, 0.84)),
    url("media/workshop.jpg") center / cover no-repeat;
}

.certificate-panel h2,
.certificate-panel p {
  color: var(--white);
}

.certificate-panel h2 {
  margin-bottom: 12px;
  font-size: 36px;
}

.certificate-copy > p:last-of-type {
  max-width: 820px;
  margin-bottom: 18px;
  color: rgba(255, 255, 255, 0.78);
}

.certificate-panel strong {
  color: var(--white);
}

.certificate-guide-list {
  display: grid;
  gap: 8px;
  max-width: 840px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.certificate-guide-list li {
  position: relative;
  padding-left: 18px;
  color: rgba(255, 255, 255, 0.78);
}

.certificate-guide-list li::before {
  position: absolute;
  left: 0;
  top: 11px;
  width: 7px;
  height: 7px;
  background: var(--cyan);
  content: "";
}

.certificate-actions {
  display: grid;
  gap: 12px;
  justify-items: stretch;
}

.certificate-actions .btn {
  display: grid;
  gap: 2px;
  min-height: 64px;
  padding: 12px 18px;
}

.certificate-actions .btn small {
  font-size: 12px;
  font-weight: 700;
  opacity: 0.76;
}

.certificate-status {
  min-height: 22px;
  margin: 2px 0 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
  text-align: center;
}

.news-section {
  padding: 104px max(24px, calc((100vw - 1220px) / 2 + 24px));
  background: var(--white);
}

.news-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.54fr) minmax(360px, 0.46fr);
  gap: 34px;
  align-items: end;
  margin-bottom: 34px;
}

.news-heading .eyebrow {
  grid-column: 1;
  margin-bottom: 8px;
}

.news-heading h2 {
  grid-column: 1;
  margin-bottom: 0;
}

.news-heading p:last-child {
  grid-column: 2;
  grid-row: 1 / span 2;
  margin: 0;
  color: var(--muted);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.news-card {
  display: grid;
  align-content: start;
  gap: 14px;
  min-height: 246px;
  padding: 28px;
  border: 1px solid var(--line);
  border-top: 4px solid var(--blue);
  background: linear-gradient(180deg, var(--white), #f8fbff);
}

.news-card span {
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

.news-card h3 {
  margin-bottom: 0;
}

.news-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.news-card a {
  align-self: end;
  color: var(--blue);
  font-weight: 900;
}

.contact-section {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 46px;
  align-items: center;
  padding-top: 96px;
  padding-bottom: 96px;
}

.contact-card {
  display: grid;
  gap: 10px;
  padding: 30px;
  background: var(--navy);
  color: var(--white);
}

.contact-card a {
  color: var(--cyan);
  font-size: 30px;
  font-weight: 900;
}

.contact-card span {
  color: rgba(255, 255, 255, 0.75);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding-top: 24px;
  padding-bottom: 24px;
  color: rgba(255, 255, 255, 0.74);
  background: var(--deep);
}

.site-footer a {
  color: var(--white);
  font-weight: 800;
}

@media (max-width: 1320px) {
  .quick-contact-bar {
    display: none;
  }
}

@media (max-width: 1120px) {
  .brand {
    min-width: 280px;
  }

  .brand-lines strong {
    font-size: 18px;
  }

  .main-nav {
    gap: 16px;
  }
}

@media (max-width: 960px) {
  .topline {
    display: none;
  }

  .nav-shell {
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .brand {
    min-width: 0;
    max-width: min(260px, 68vw);
  }

  .brand-mark {
    width: 34px;
    height: 34px;
    font-size: 15px;
  }

  .brand-lines strong {
    font-size: 15px;
  }

  .brand-lines small {
    display: none;
  }

  .menu-button {
    display: block;
  }

  .main-nav {
    position: absolute;
    top: 70px;
    right: 18px;
    left: 18px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 18px;
    background: var(--white);
    box-shadow: var(--shadow);
  }

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

  .main-nav > a,
  .nav-trigger {
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
    text-align: left;
  }

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

  .nav-item .nav-trigger {
    width: 100%;
    border-bottom: 0;
  }

  .nav-dropdown {
    position: static;
    display: none;
    min-width: 0;
    padding: 0 0 10px 12px;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    backdrop-filter: none;
    opacity: 1;
    pointer-events: auto;
    transform: none;
  }

  .nav-dropdown::before {
    display: none;
  }

  .nav-item.is-open .nav-dropdown {
    display: grid;
  }

  .nav-item:hover .nav-dropdown,
  .nav-item:focus-within .nav-dropdown {
    transform: none;
  }

  .nav-dropdown a {
    padding: 9px 0;
  }

  .hero {
    min-height: 720px;
  }

  .hero-inner {
    padding: 96px 18px 260px;
  }

  .hero-dots {
    left: 18px;
    bottom: 188px;
  }

  .standard-ribbon {
    left: 18px;
    right: 18px;
    bottom: 28px;
    min-width: 0;
  }

  .platform-section,
  .patent-section,
  .factory-section,
  .service-chain-inner,
  .infinair-product-board,
  .product-grid,
  .detail-heading,
  .threec-head,
  .service-heading,
  .certificate-panel,
  .video-section,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .platform-section,
  .patent-section,
  .factory-section,
  .service-chain-inner,
  .video-section {
    padding: 76px 18px;
  }

  .service-section {
    padding: 76px 18px;
  }

  .news-section {
    padding: 76px 18px;
  }

  .flow-grid,
  .patent-list,
  .about-proof-grid,
  .about-culture,
  .solution-scenarios,
  .product-family-grid,
  .focus-shell,
  .chain-board,
  .service-grid,
  .news-grid,
  .case-metrics,
  .case-gallery {
    grid-template-columns: 1fr 1fr;
  }

  .infinair-product-board .focus-shell {
    grid-template-columns: 1fr;
  }

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

  .assembly-stage {
    margin: 0 24px 24px;
  }

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

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

  .terminal-family {
    grid-row: auto;
  }

  .detail-heading span,
  .detail-heading h3,
  .detail-heading p,
  .threec-head p,
  .service-heading .eyebrow,
  .service-heading h2,
  .service-heading p:last-child,
  .case-heading .eyebrow,
  .case-heading h2,
  .case-heading p:last-child,
  .news-heading .eyebrow,
  .news-heading h2,
  .news-heading p:last-child {
    grid-column: auto;
    grid-row: auto;
  }

  .case-heading,
  .news-heading {
    grid-template-columns: 1fr;
  }

  .solution-intro {
    margin: 0 0 30px;
  }

  .case-inner {
    padding: 76px 18px;
  }

  .case-feature-row {
    grid-template-columns: 1fr;
  }

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

  .certificate-actions {
    justify-items: start;
  }

  .certificate-actions .btn {
    width: min(100%, 360px);
  }

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

  .product-category-feature {
    grid-template-columns: 1fr;
  }

  .category-quick-card {
    padding-left: 18px;
  }

  .factory-media img,
  .product-grid img {
    height: auto;
    min-height: 0;
  }

  .factory-media img:first-child {
    margin-top: 0;
  }
}

@media (max-width: 620px) {
  h1 {
    max-width: 100%;
    font-size: 32px;
    line-height: 1.12;
    overflow-wrap: anywhere;
  }

  .mobile-break {
    display: block;
  }

  h2 {
    font-size: 30px;
  }

  .hero-slide h2 {
    font-size: 32px;
    line-height: 1.12;
  }

  .hero-text,
  .manifesto p,
  .platform-copy p,
  .factory-copy p,
  .case-heading p,
  .video-copy p {
    font-size: 16px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-inner {
    padding-top: 84px;
    padding-bottom: 248px;
  }

  .hero-dots {
    bottom: 198px;
  }

  .standard-ribbon span {
    font-size: 12px;
    line-height: 1.45;
  }

  .btn {
    width: 100%;
  }

  .section {
    padding-top: 72px;
    padding-bottom: 72px;
    padding-left: 18px;
    padding-right: 18px;
  }

  .flow-grid,
  .patent-list,
  .about-proof-grid,
  .about-culture,
  .solution-scenarios,
  .product-family-grid,
  .focus-shell,
  .chain-board,
  .service-grid,
  .news-grid,
  .case-metrics,
  .case-gallery,
  .subfamily-grid,
  .factory-media {
    grid-template-columns: 1fr;
  }

  .flow-grid article {
    min-height: 0;
  }

  .about-proof-grid article,
  .solution-scenarios article,
  .case-feature-row article {
    min-height: 0;
  }

  .chain-board::before {
    display: none;
  }

  .chain-board article {
    min-height: 0;
  }

  .about-proof-grid strong,
  .case-metrics strong {
    font-size: 30px;
  }

  .detail-heading {
    gap: 14px;
  }

  .detail-heading h3 {
    font-size: 26px;
  }

  .detail-title-row {
    gap: 10px;
  }

  .detail-more {
    min-height: 34px;
  }

  .focus-device {
    min-height: 0;
  }

  .quick-contact-bar {
    display: none;
  }

  .focus-copy {
    padding: 24px;
  }

  .focus-copy h4 {
    font-size: 24px;
  }

  .assembly-stage {
    min-height: 300px;
    margin: 0 18px 18px;
  }

  .infinair-product-board {
    grid-template-columns: 1fr;
    padding: 18px;
  }

  .product-switch-cards {
    grid-template-columns: 1fr;
  }

  .assembly-ghost {
    display: none;
  }

  .explode-part {
    opacity: 0.8;
    transform-origin: center;
  }

  .part-tag {
    padding: 7px 9px;
    font-size: 12px;
  }

  .product-library {
    padding: 20px;
  }

  .library-card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    padding: 0 14px 14px;
  }

  .library-group summary {
    padding: 16px 14px;
  }

  .library-group summary span {
    font-size: 17px;
  }

  .service-heading {
    gap: 14px;
  }

  .case-feature-row article {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .case-feature-row img {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
  }

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

  .case-logo-grid span {
    min-height: 72px;
    font-size: 13px;
  }

  .service-card {
    min-height: 0;
    padding: 24px;
  }

  .certificate-panel {
    padding: 24px;
  }

  .certificate-panel h2 {
    font-size: 28px;
  }

  .threec-showcase {
    padding: 20px;
  }

  .threec-head {
    gap: 12px;
    padding-bottom: 18px;
  }

  .threec-head h4 {
    font-size: 24px;
  }

  .threec-groups {
    gap: 24px;
    margin-top: 22px;
  }

  .gallery-group-head h5 {
    font-size: 18px;
  }

  .product-category-feature {
    padding: 14px;
  }

  .category-hero-photo img {
    min-height: 0;
  }

  .category-quick-card {
    gap: 12px;
    padding: 4px 0 4px 16px;
  }

  .category-quick-card h6 {
    font-size: 22px;
  }

  .product-spec-list div {
    grid-template-columns: 74px minmax(0, 1fr);
    gap: 10px;
  }

  .product-photo-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 14px;
  }

  .product-family {
    padding: 24px;
  }

  .family-head h4 {
    font-size: 24px;
  }

  .platform-visual {
    margin-left: -6px;
    margin-right: -6px;
  }

  .contact-section {
    padding-left: 18px;
    padding-right: 18px;
  }

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