:root {
  color-scheme: light;
  --page: #f4f7fa;
  --paper: #ffffff;
  --paper-soft: #f8fbfd;
  --ink: #0d1b2e;
  --ink-soft: #263a53;
  --muted: #66758a;
  --line: #d7e1ea;
  --line-strong: #b9c8d6;
  --navy: #09243f;
  --blue: #0a69a3;
  --teal: #168b8f;
  --green: #2c9b58;
  --amber: #c96a2b;
  --shadow-sm: 0 10px 24px rgba(13, 27, 46, 0.08);
  --shadow-md: 0 24px 64px rgba(13, 27, 46, 0.14);
  --radius: 8px;
  --max: 1360px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background:
    linear-gradient(90deg, rgba(9, 36, 63, 0.04) 1px, transparent 1px),
    linear-gradient(0deg, rgba(9, 36, 63, 0.035) 1px, transparent 1px),
    var(--page);
  background-size: 44px 44px, 44px 44px, auto;
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

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

img {
  height: auto;
}

a {
  color: inherit;
}

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

:focus-visible {
  outline: 3px solid rgba(22, 139, 143, 0.38);
  outline-offset: 3px;
}

code {
  padding: 0.12rem 0.35rem;
  border-radius: 5px;
  background: #e9f1f7;
  color: var(--blue);
  font-family: Consolas, "Liberation Mono", monospace;
  font-size: 0.94em;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(220px, 1fr) auto minmax(160px, 1fr);
  align-items: center;
  min-height: 72px;
  padding: 0 32px;
  border-bottom: 1px solid rgba(185, 200, 214, 0.72);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(18px);
}

.brand,
.site-nav a,
.header-action,
.text-link,
.inline-button {
  text-decoration: none;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  width: max-content;
}

.brand-mark {
  display: grid;
  width: 48px;
  height: 36px;
  place-items: center;
  border-radius: 8px;
  background: var(--navy);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 850;
  box-shadow: 0 10px 24px rgba(9, 36, 63, 0.18);
}

.brand-text {
  color: var(--ink);
  font-size: 1.04rem;
  font-weight: 850;
  line-height: 1;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 22px;
  color: #4f6074;
  font-size: 1.02rem;
  font-weight: 800;
}

.site-nav a {
  position: relative;
  padding: 24px 0;
  white-space: nowrap;
}

.site-nav a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 18px;
  left: 0;
  height: 2px;
  border-radius: 999px;
  background: var(--teal);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 160ms ease;
}

.site-nav a:hover {
  color: var(--navy);
}

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

.header-action {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border-radius: 8px;
  background: var(--navy);
  color: #fff;
  font-size: 0.98rem;
  font-weight: 800;
  box-shadow: 0 12px 28px rgba(9, 36, 63, 0.18);
}

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 92px 24px;
  scroll-margin-top: 92px;
}

.section-band {
  max-width: none;
  margin: 0;
}

.section-band > * {
  max-width: var(--max);
  margin-right: auto;
  margin-left: auto;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 76px 24px 64px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(255, 255, 255, 0.82)),
    linear-gradient(135deg, rgba(10, 105, 163, 0.08), rgba(44, 155, 88, 0.06));
}

.hero::before {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 1px;
  background: var(--line);
}

.hero-content {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.76fr) minmax(560px, 1.24fr);
  align-items: center;
  gap: 40px;
}

.hero-copy {
  min-width: 0;
}

.hero h1 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(2.35rem, 4.15vw, 3.95rem);
  font-weight: 900;
  line-height: 1.07;
  letter-spacing: 0;
}

.hero h1 span {
  display: block;
}

.hero-lede {
  max-width: 620px;
  margin: 22px 0 0;
  color: var(--ink-soft);
  font-size: 1.04rem;
  line-height: 1.86;
}

.hero-highlights {
  display: grid;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.hero-highlights li {
  position: relative;
  padding-left: 24px;
  color: #263a53;
  font-size: 0.96rem;
  font-weight: 800;
  line-height: 1.5;
}

.hero-highlights li::before {
  content: "";
  position: absolute;
  top: 0.52em;
  left: 2px;
  width: 9px;
  height: 9px;
  border: 2px solid var(--green);
  border-top: 0;
  border-left: 0;
  transform: rotate(45deg);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.button,
.text-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 8px;
  cursor: pointer;
  font: inherit;
  font-size: 0.96rem;
  font-weight: 850;
  line-height: 1.1;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease, border-color 160ms ease;
}

.button svg,
.text-link svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
  flex: 0 0 auto;
}

.button:hover,
.inline-button:hover,
.text-button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--green);
  color: #fff;
  box-shadow: 0 14px 28px rgba(44, 155, 88, 0.24);
}

.button-primary:hover {
  background: #26894d;
  box-shadow: 0 16px 32px rgba(44, 155, 88, 0.3);
}

.button-secondary {
  border-color: var(--line-strong);
  background: rgba(255, 255, 255, 0.86);
  color: var(--navy);
}

.button-secondary:hover {
  background: #fff;
  border-color: #9eb1c2;
}

.button.is-disabled,
.text-button.is-disabled {
  cursor: not-allowed;
  background: #d7e0e8;
  color: #68788a;
  box-shadow: none;
  transform: none;
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 36px 0 0;
}

.hero-facts div {
  padding: 17px;
  border: 1px solid rgba(10, 105, 163, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 8px 20px rgba(13, 27, 46, 0.05);
}

.hero-facts dt {
  color: var(--blue);
  font-size: 1.18rem;
  font-weight: 900;
  line-height: 1.2;
}

.hero-facts dd {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.38;
}

.hero-media {
  position: relative;
  min-width: 0;
  margin: 0;
  padding: 10px;
  border: 1px solid rgba(185, 200, 214, 0.95);
  border-radius: 8px;
  background: linear-gradient(180deg, #ffffff, #e8f0f6);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

@media (min-width: 1200px) {
  .hero-media {
    width: min(66vw, 980px);
    margin-right: -58px;
  }
}

.hero-media img {
  width: 100%;
  border: 1px solid #aebdcc;
  border-radius: 6px;
  object-fit: contain;
}

.hero-media figcaption {
  position: absolute;
  right: 18px;
  bottom: 18px;
  max-width: calc(100% - 36px);
  padding: 8px 11px;
  border-radius: 7px;
  background: rgba(8, 20, 34, 0.82);
  color: rgba(255, 255, 255, 0.94);
  font-size: 0.78rem;
  font-weight: 800;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 38px;
}

.section-heading h2,
.paper-copy h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(1.9rem, 3vw, 2.72rem);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: 0;
}

.section-heading p,
.paper-copy p {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.9;
}

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

.feature-card,
.demo-card,
.download-card,
.requirement-block,
.version-card,
details,
.contact-strip {
  border: 1px solid rgba(185, 200, 214, 0.82);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow-sm);
}

.feature-card {
  position: relative;
  min-height: 244px;
  padding: 24px;
  overflow: hidden;
}

.feature-card::before,
.version-card::before,
.download-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--teal), var(--green));
}

.feature-icon {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 8px;
  background: #e4f4f3;
  color: var(--teal);
}

.feature-icon svg {
  width: 23px;
  height: 23px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.feature-card h3,
.demo-body h3,
.download-card h3,
.requirement-block h3,
.version-card h3 {
  margin: 18px 0 8px;
  color: var(--ink);
  font-size: 1.1rem;
  line-height: 1.3;
}

.feature-card p,
.demo-body p,
.download-card p,
.requirement-block li,
.version-card p,
.version-card li {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.75;
}

.paper-section {
  padding: 96px 24px;
  background:
    linear-gradient(135deg, rgba(9, 36, 63, 0.96), rgba(8, 65, 90, 0.94)),
    var(--navy);
}

.paper-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 42px;
  align-items: start;
}

.paper-copy h2,
.paper-copy p {
  color: #fff;
}

.paper-copy p {
  color: rgba(255, 255, 255, 0.78);
}

.paper-note {
  padding: 18px 20px;
  border-left: 4px solid #40c2ad;
  border-radius: 0 8px 8px 0;
  background: rgba(255, 255, 255, 0.08);
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  margin-top: 28px;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  color: #d8f8f2;
  font-size: 0.95rem;
  font-weight: 850;
}

.text-link:hover {
  color: #fff;
}

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

#demos .section-heading {
  display: grid;
  max-width: var(--max);
  margin-right: auto;
  margin-left: auto;
  grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
  column-gap: 64px;
  row-gap: 10px;
  align-items: center;
}

#demos .section-heading .section-label,
#demos .section-heading h2 {
  grid-column: 1;
}

#demos .section-heading h2 {
  font-size: clamp(2.1rem, 3.4vw, 3.08rem);
}

#demos .section-heading p {
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: center;
  max-width: none;
  margin: 0;
  padding: 14px 0 14px 24px;
  border-left: 3px solid rgba(18, 124, 128, 0.28);
  color: #526176;
  font-size: 1.04rem;
  line-height: 2;
}

.demo-card {
  overflow: hidden;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.demo-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.demo-card video {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #07111b;
  object-fit: cover;
}

.video-shell {
  position: relative;
  background: #07111b;
}

.video-play {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 2;
  min-width: 92px;
  min-height: 42px;
  padding: 0 18px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  background: rgba(44, 155, 88, 0.94);
  color: #fff;
  cursor: pointer;
  font: inherit;
  font-size: 0.92rem;
  font-weight: 850;
  transform: translate(-50%, -50%);
  transition: opacity 160ms ease, transform 160ms ease, background 160ms ease;
}

.video-play:hover {
  background: rgba(38, 137, 77, 0.98);
  transform: translate(-50%, -50%) scale(1.03);
}

.video-shell.is-playing .video-play {
  pointer-events: none;
  opacity: 0;
}

.demo-body {
  padding: 20px;
}

.demo-body h3 {
  margin-top: 0;
}

.demo-link {
  display: inline-flex;
  margin-top: 14px;
  color: var(--teal);
  font-size: 0.9rem;
  font-weight: 850;
  text-decoration: none;
}

.demo-link:hover {
  color: var(--navy);
}

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

.version-card {
  position: relative;
  display: flex;
  min-height: 360px;
  flex-direction: column;
  padding: 26px;
  overflow: hidden;
}

.version-card-featured {
  border-color: rgba(44, 155, 88, 0.42);
  background: linear-gradient(180deg, #ffffff, #f4fbf7);
}

.pro-version-card {
  border-color: rgba(201, 106, 43, 0.34);
  background: linear-gradient(180deg, #ffffff, #fff8f3);
}

.version-tag,
.download-label {
  display: inline-flex;
  width: max-content;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  background: #e5f3f3;
  color: #0f777b;
  font-size: 0.78rem;
  font-weight: 850;
}

.version-card h3,
.download-card h3 {
  margin-top: 18px;
  font-size: 1.32rem;
}

.version-card ul {
  display: grid;
  gap: 10px;
  margin: 22px 0 26px;
  padding: 0;
  list-style: none;
}

.version-card li {
  position: relative;
  padding-left: 22px;
}

.version-card li::before {
  content: "";
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
}

.inline-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  margin-top: auto;
  padding: 0 13px;
  border-radius: 8px;
  background: #eaf4f6;
  color: var(--blue);
  font-size: 0.88rem;
  font-weight: 850;
  transition: transform 160ms ease, background 160ms ease;
}

.inline-button:hover {
  background: #dceff3;
}

.download-section {
  padding-top: 96px;
}

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

.download-card {
  position: relative;
  display: flex;
  min-height: 318px;
  flex-direction: column;
  align-items: flex-start;
  padding: 26px;
  overflow: hidden;
}

.download-card p {
  margin-bottom: 22px;
}

.download-card .button {
  width: 100%;
  margin-top: auto;
}

.download-meta {
  display: block;
  min-height: 42px;
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.5;
}

.pro-card {
  border-color: rgba(201, 106, 43, 0.36);
  background: #fffaf6;
}

.pro-card::before {
  background: linear-gradient(90deg, var(--amber), #e0a15e);
}

.pro-card .button-secondary {
  border-color: rgba(201, 106, 43, 0.36);
  color: #8a3d14;
}

.contact-strip {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 18px;
  margin-top: 18px;
  padding: 18px 20px;
}

.contact-strip p {
  margin: 0;
  color: var(--ink);
  font-weight: 850;
}

.contact-strip div {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
  width: 100%;
}

.contact-strip span,
.text-button {
  min-height: 34px;
  padding: 7px 10px;
  border-radius: 8px;
  background: #edf4f7;
  color: var(--ink-soft);
  font-size: 0.88rem;
  font-weight: 750;
}

.text-button {
  border: 0;
}

.requirements-section {
  padding: 92px 24px;
  background: #edf6f2;
}

.requirements-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.requirement-block {
  padding: 26px;
}

.requirement-block h3 {
  margin-top: 0;
}

.requirement-block ul {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-left: 20px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.steps li {
  position: relative;
  min-height: 178px;
  padding: 58px 22px 22px;
  border: 1px solid rgba(185, 200, 214, 0.82);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow-sm);
  counter-increment: step;
}

.steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  top: 20px;
  left: 22px;
  color: var(--blue);
  font-size: 1rem;
  font-weight: 900;
}

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

.steps strong {
  color: var(--ink);
  font-size: 1.05rem;
}

.steps span {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.65;
}

.faq-section {
  padding-top: 90px;
}

.faq-list {
  display: grid;
  gap: 12px;
}

details {
  box-shadow: none;
}

summary {
  cursor: pointer;
  padding: 18px 20px;
  color: var(--ink);
  font-weight: 850;
}

details p {
  margin: 0;
  padding: 0 20px 20px;
  color: var(--muted);
  line-height: 1.75;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 30px 32px;
  border-top: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer strong,
.site-footer span {
  display: block;
}

.site-footer strong {
  color: var(--ink);
  font-size: 1rem;
}

.site-footer p {
  max-width: 560px;
  margin: 0;
  text-align: right;
}

@media (max-width: 1080px) {
  .site-header {
    grid-template-columns: 1fr auto;
    gap: 16px;
    padding: 0 22px;
  }

  .site-nav {
    grid-column: 1 / -1;
    order: 3;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .site-nav a {
    padding: 8px 0 16px;
  }

  .site-nav a::after {
    bottom: 10px;
  }

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

  .hero-media {
    max-width: 940px;
  }

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

  .paper-layout,
  .download-grid,
  .demo-grid,
  .version-cards {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 780px) {
  body {
    font-size: 15px;
  }

  .site-header {
    position: static;
    min-height: auto;
    padding: 16px;
  }

  .header-action {
    display: none;
  }

  .site-nav {
    gap: 16px;
    width: 100%;
    max-width: calc(100vw - 32px);
    font-size: 0.98rem;
  }

  .section,
  .hero,
  .paper-section,
  .requirements-section {
    padding: 62px 16px;
  }

  .hero h1 {
    font-size: clamp(2rem, 9vw, 2.85rem);
    line-break: anywhere;
    word-break: break-all;
  }

  .hero-lede {
    font-size: 1rem;
    line-height: 1.76;
  }

  .hero-actions,
  .link-row {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .button,
  .link-row .text-link {
    width: 100%;
  }

  .hero-facts,
  .feature-grid,
  .requirements-layout,
  .steps {
    grid-template-columns: 1fr;
  }

  .hero-media {
    padding: 6px;
  }

  .hero-media figcaption {
    position: static;
    border-radius: 0 0 6px 6px;
  }

  .contact-strip,
  .site-footer {
    display: block;
  }

  .contact-strip div {
    justify-content: flex-start;
    margin-top: 12px;
  }

  .site-footer {
    padding: 24px 16px;
  }

  .site-footer p {
    margin-top: 12px;
    text-align: left;
  }
}

@media (max-width: 420px) {
  .brand-text {
    display: none;
  }

  .button {
    min-height: 44px;
    padding: 0 14px;
    font-size: 0.9rem;
  }

  .feature-card,
  .download-card,
  .requirement-block,
  .version-card {
    padding: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}

/* Advanced product redesign pass */
:root {
  --page: #f5f6f8;
  --paper: #ffffff;
  --paper-soft: #f8fafc;
  --ink: #0b1220;
  --ink-soft: #263348;
  --muted: #667085;
  --line: #d9e1ea;
  --line-strong: #b8c4d2;
  --navy: #07182a;
  --blue: #095f92;
  --teal: #127c80;
  --green: #23824d;
  --amber: #b86024;
  --shadow-sm: 0 10px 28px rgba(11, 18, 32, 0.06);
  --shadow-md: 0 28px 70px rgba(11, 18, 32, 0.14);
}

body {
  background: var(--page);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
  text-rendering: optimizeLegibility;
}

.site-header {
  grid-template-columns: minmax(220px, 1fr) auto minmax(160px, 1fr);
  border-bottom-color: rgba(217, 225, 234, 0.86);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.72) inset;
}

.brand-mark {
  background: #07182a;
  box-shadow: 0 12px 30px rgba(7, 24, 42, 0.16);
}

.site-nav {
  color: #5a6678;
  gap: 40px;
  font-size: 1.24rem;
  font-weight: 900;
  letter-spacing: 0;
}

.header-action {
  background: #07182a;
  font-size: 1.05rem;
  box-shadow: 0 16px 34px rgba(7, 24, 42, 0.18);
}

.hero {
  min-height: 660px;
  padding: 86px 24px 50px;
  background:
    radial-gradient(circle at 78% 42%, rgba(18, 124, 128, 0.13), transparent 34%),
    radial-gradient(circle at 56% 8%, rgba(9, 95, 146, 0.11), transparent 26%),
    linear-gradient(180deg, #fbfcfd 0%, #f2f5f8 100%);
}

.hero-content {
  max-width: min(var(--max), calc(100vw - 48px));
  grid-template-columns: minmax(360px, 430px) minmax(700px, 1fr);
  gap: 60px;
}

.hero-copy {
  max-width: 430px;
}

.hero h1 {
  font-size: clamp(2.55rem, 3.55vw, 3.18rem);
  font-weight: 860;
  line-height: 1.06;
  letter-spacing: 0;
}

.hero-lede {
  max-width: 430px;
  margin-top: 24px;
  color: #344156;
  font-size: 1.02rem;
  line-height: 1.86;
}

.hero-actions {
  margin-top: 30px;
}

.hero-facts {
  margin-top: 34px;
  gap: 10px;
}

.hero-facts div {
  padding: 15px 16px;
  border-color: rgba(9, 95, 146, 0.12);
  background: rgba(255, 255, 255, 0.62);
  box-shadow: none;
}

.hero-media {
  justify-self: end;
  width: min(900px, 100%);
  padding: 12px;
  border-color: rgba(144, 161, 179, 0.78);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(236, 242, 247, 0.94));
  box-shadow:
    0 40px 100px rgba(11, 18, 32, 0.2),
    0 12px 36px rgba(9, 95, 146, 0.1);
  transform: translateX(18px) scale(1.06);
}

.hero-media img {
  margin-top: -18px;
  margin-bottom: -18px;
  border-color: rgba(126, 144, 165, 0.9);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.8) inset;
}

.hero-media figcaption {
  right: 24px;
  bottom: 24px;
  background: rgba(7, 24, 42, 0.86);
}

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

.section-label {
  display: block;
  margin-bottom: 14px;
  color: var(--teal);
  font-size: 0.74rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  line-height: 1.2;
  text-transform: uppercase;
}

.section-heading {
  max-width: 700px;
  margin-bottom: 44px;
}

.section-heading h2,
.paper-copy h2 {
  font-size: clamp(2rem, 3vw, 3.05rem);
  font-weight: 880;
  line-height: 1.08;
}

.section-heading p,
.paper-copy p {
  color: #5f6b7d;
  line-height: 1.86;
}

#features {
  max-width: none;
  padding-right: max(24px, calc((100vw - var(--max)) / 2));
  padding-left: max(24px, calc((100vw - var(--max)) / 2));
  background: linear-gradient(180deg, #f2f5f8 0%, #f7f8fa 100%);
}

.feature-grid {
  max-width: var(--max);
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  overflow: hidden;
  border: 1px solid rgba(185, 200, 214, 0.72);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  counter-reset: feature-step;
}

.feature-card {
  min-height: 246px;
  padding: 30px 28px 28px;
  border: 0;
  border-right: 1px solid rgba(185, 200, 214, 0.62);
  border-radius: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(250, 252, 253, 0.92));
  box-shadow: none;
  counter-increment: feature-step;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

.feature-card::before {
  content: counter(feature-step, decimal-leading-zero);
  position: static;
  display: inline-flex;
  width: auto;
  height: auto;
  margin-bottom: 24px;
  background: none;
  color: #0b7f82;
  font-size: 1.32rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0.02em;
  opacity: 1;
}

.feature-card:last-child {
  border-right: 0;
}

.feature-card:hover {
  transform: translateY(-2px);
  border-color: rgba(18, 124, 128, 0.24);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 20px 54px rgba(11, 18, 32, 0.08);
}

.feature-icon {
  position: absolute;
  top: 26px;
  right: 26px;
  width: 40px;
  height: 40px;
  background: #edf7f6;
}

.feature-card h3 {
  margin-top: 44px;
  font-size: 1.12rem;
  font-weight: 850;
}

.feature-card p {
  color: #657285;
}

.workflow-tip {
  max-width: var(--max);
  margin: 18px 0 0;
  padding: 18px 20px;
  border: 1px solid rgba(44, 155, 88, 0.24);
  border-left: 5px solid var(--green);
  border-radius: 8px;
  background: #f0fbf4;
  color: #263a53;
  font-size: 0.98rem;
  line-height: 1.7;
  box-shadow: 0 14px 34px rgba(44, 155, 88, 0.08);
}

.workflow-tip strong {
  color: #176a3b;
  font-weight: 900;
}

.paper-section {
  padding-top: 126px;
  padding-bottom: 126px;
  background:
    radial-gradient(circle at 82% 18%, rgba(64, 194, 173, 0.16), transparent 30%),
    linear-gradient(135deg, #061524 0%, #0b3041 58%, #08253a 100%);
}

.paper-layout {
  grid-template-columns: 1fr;
  gap: 42px;
}

.paper-copy .section-label {
  color: #86efe0;
}

.paper-copy h2 {
  max-width: 760px;
  color: #fff;
}

.paper-copy p {
  max-width: 820px;
  color: rgba(255, 255, 255, 0.76);
}

.paper-header {
  display: grid;
  grid-template-columns: minmax(320px, 0.86fr) minmax(560px, 1.14fr);
  gap: clamp(34px, 5.4vw, 86px);
  align-items: start;
  padding-bottom: 38px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.13);
}

.paper-title-block {
  padding-top: 6px;
}

.paper-title-block h2 {
  max-width: 660px;
  margin: 0;
  font-size: clamp(2.55rem, 3.45vw, 3.75rem);
  line-height: 1.04;
}

.paper-summary {
  max-width: 780px;
  padding: 4px 0 4px 30px;
  border-left: 1px solid rgba(134, 239, 224, 0.48);
  background: transparent;
  box-shadow: none;
}

.paper-summary p {
  max-width: none;
  margin: 15px 0 0;
}

.paper-summary p:first-child {
  margin-top: 0;
}

.paper-title-en {
  color: #ffffff !important;
  font-size: 0.98rem;
  font-weight: 850;
  line-height: 1.65 !important;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(134, 239, 224, 0.16);
}

.paper-note {
  max-width: none;
  margin-top: 28px !important;
  padding: 22px 28px;
  border-left-color: #55d6c7;
  background: rgba(255, 255, 255, 0.075);
  color: rgba(255, 255, 255, 0.84) !important;
}

.paper-copy .paper-note {
  max-width: none;
}

.text-link {
  color: #d9fff8;
}

#demos {
  max-width: none;
  padding-right: max(24px, calc((100vw - var(--max)) / 2));
  padding-left: max(24px, calc((100vw - var(--max)) / 2));
  background: #f6f8fa;
}

.demo-grid {
  max-width: var(--max);
  gap: 22px;
}

.demo-card {
  border-color: rgba(185, 200, 214, 0.7);
  box-shadow: none;
}

.demo-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 22px 58px rgba(11, 18, 32, 0.1);
}

.demo-body {
  padding: 24px;
}

.demo-body h3 {
  font-size: 1.1rem;
}

.application-panel {
  display: grid;
  max-width: var(--max);
  margin: 34px auto 0;
  grid-template-columns: minmax(240px, 300px) minmax(0, 1fr);
  gap: 28px;
  padding: 26px;
  border: 1px solid rgba(185, 200, 214, 0.76);
  border-radius: 8px;
  background:
    radial-gradient(circle at 100% 0%, rgba(85, 214, 199, 0.12), transparent 28%),
    rgba(255, 255, 255, 0.94);
}

.application-heading h3,
.audience-heading h3 {
  margin: 8px 0 0;
  color: var(--ink);
  font-size: clamp(1.55rem, 2.1vw, 2.1rem);
  line-height: 1.08;
  font-weight: 900;
}

.application-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.application-grid article {
  min-height: 156px;
  padding: 18px;
  border: 1px solid rgba(185, 200, 214, 0.66);
  border-radius: 8px;
  background: rgba(250, 252, 253, 0.86);
}

.application-grid span {
  display: inline-flex;
  min-width: 34px;
  min-height: 28px;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: #e5f8f4;
  color: #087b75;
  font-size: 0.82rem;
  font-weight: 900;
}

.application-grid strong {
  display: block;
  margin-top: 18px;
  color: var(--ink);
  font-size: 1.02rem;
  line-height: 1.32;
  font-weight: 880;
}

.application-grid p {
  margin: 10px 0 0;
  color: #5f6b7d;
  font-size: 0.92rem;
  line-height: 1.7;
}

#versions {
  padding-top: 118px;
  padding-bottom: 118px;
  background:
    radial-gradient(circle at 50% 0%, rgba(18, 124, 128, 0.08), transparent 30%),
    #ffffff;
}

#versions .section-heading {
  display: grid;
  max-width: var(--max);
  margin-right: auto;
  margin-left: auto;
  grid-template-columns: minmax(360px, 440px) minmax(0, 1fr);
  column-gap: 64px;
  row-gap: 10px;
  align-items: center;
  text-align: left;
}

#versions .section-heading .section-label,
#versions .section-heading h2 {
  grid-column: 1;
  text-align: left;
}

#versions .section-heading h2 {
  font-size: clamp(3rem, 4.1vw, 4.05rem);
  line-height: 0.98;
}

#versions .section-heading p {
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: center;
  max-width: 680px;
  margin: 0;
  padding: 14px 0 14px 24px;
  border-left: 3px solid rgba(18, 124, 128, 0.28);
  color: #526176;
  font-size: 1.04rem;
  line-height: 2;
}

.version-cards {
  gap: 22px;
}

.version-card {
  min-height: 430px;
  padding: 30px;
  border-color: rgba(184, 196, 210, 0.8);
  background: #fff;
  box-shadow: 0 18px 56px rgba(11, 18, 32, 0.07);
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.version-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 28px 76px rgba(11, 18, 32, 0.11);
}

.version-card::before {
  height: 0;
}

.version-card-recommended {
  border-color: rgba(18, 124, 128, 0.42);
  background:
    radial-gradient(circle at 88% 0%, rgba(85, 214, 199, 0.14), transparent 30%),
    linear-gradient(180deg, #ffffff, #f7fcfb);
  box-shadow: 0 24px 72px rgba(18, 124, 128, 0.12);
}

.version-card-recommended::before {
  height: 3px;
  background: linear-gradient(90deg, #1aa39b, #2c9b58);
}

.version-card-recommended .version-tag {
  background: #ddf7f2;
  color: #087b75;
}

.version-card h3 {
  margin-top: 26px;
  font-size: 1.55rem;
  font-weight: 880;
}

.version-card ul {
  gap: 13px;
  margin-top: 26px;
}

.version-card .inline-button {
  width: 100%;
  min-height: 44px;
  background: #f1f5f8;
}

.version-card .button {
  width: 100%;
  margin-top: auto;
}

.version-card .download-meta {
  min-height: 0;
  margin-top: 12px;
}

.version-card-featured .download-meta {
  color: rgba(255, 255, 255, 0.66);
}

.version-card-featured .button-secondary {
  border-color: transparent;
  background: #ffffff;
  color: #071524;
}

.version-card-featured {
  z-index: 1;
  min-height: 456px;
  margin-top: -14px;
  border-color: rgba(7, 24, 42, 0.85);
  background:
    radial-gradient(circle at 85% 4%, rgba(85, 214, 199, 0.17), transparent 34%),
    linear-gradient(180deg, #08192b, #071524);
  color: #fff;
  box-shadow: 0 34px 90px rgba(7, 24, 42, 0.32);
}

.version-card-featured h3,
.version-card-featured p,
.version-card-featured li {
  color: #fff;
}

.version-card-featured p,
.version-card-featured li {
  color: rgba(255, 255, 255, 0.76);
}

.version-card-featured .version-tag {
  background: rgba(85, 214, 199, 0.14);
  color: #96fff1;
}

.version-card-featured li::before {
  background: #55d6c7;
}

.version-card-featured .inline-button {
  background: #ffffff;
  color: #071524;
}

.audience-panel {
  display: grid;
  max-width: var(--max);
  margin: 24px auto 0;
  grid-template-columns: minmax(240px, 300px) minmax(0, 1fr);
  gap: 26px;
  align-items: center;
  padding: 26px;
  border: 1px solid rgba(185, 200, 214, 0.72);
  border-radius: 8px;
  background:
    radial-gradient(circle at 100% 0%, rgba(44, 155, 88, 0.1), transparent 28%),
    #ffffff;
  box-shadow: 0 18px 56px rgba(11, 18, 32, 0.06);
}

.audience-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.audience-list li {
  min-height: 74px;
  padding: 18px;
  border: 1px solid rgba(185, 200, 214, 0.66);
  border-radius: 8px;
  background: #f7fbf9;
  color: var(--ink);
  font-size: 1rem;
  line-height: 1.45;
  font-weight: 850;
  white-space: nowrap;
}

.contact-strip .contact-line {
  width: 100%;
  margin: 0;
  color: var(--ink);
  font-size: 1rem;
  line-height: 1.6;
  font-weight: 850;
}

.contact-strip .contact-line a {
  color: var(--green);
  text-decoration: none;
}

.contact-strip .contact-line a:hover {
  text-decoration: underline;
}

.download-section {
  max-width: none;
  padding-right: max(24px, calc((100vw - var(--max)) / 2));
  padding-left: max(24px, calc((100vw - var(--max)) / 2));
  background: #f2f5f8;
}

.download-grid,
.contact-strip {
  max-width: var(--max);
}

.download-card {
  border-color: rgba(185, 200, 214, 0.72);
  box-shadow: none;
}

.download-card::before {
  height: 2px;
}

.download-card h3 {
  font-size: 1.45rem;
}

.requirements-section {
  background: linear-gradient(180deg, #f7fbf8, #eef7f2);
}

.requirement-block,
.steps li,
details {
  box-shadow: none;
}

@media (max-width: 1180px) {
  .hero-content {
    grid-template-columns: minmax(320px, 420px) minmax(540px, 1fr);
    gap: 38px;
  }

  .hero-media {
    transform: none;
  }
}

@media (max-width: 1080px) {
  .hero {
    min-height: auto;
  }

  .hero-content {
    grid-template-columns: 1fr;
    max-width: min(940px, calc(100vw - 44px));
  }

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

  .hero-media {
    justify-self: start;
    width: 100%;
  }

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

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

  .demo-grid,
  .download-grid,
  .version-cards,
  .requirements-layout,
  .steps {
    grid-template-columns: 1fr;
  }

  .application-panel,
  .audience-panel {
    grid-template-columns: 1fr;
  }

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

  .version-card-featured {
    min-height: 430px;
    margin-top: 0;
  }

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

  .paper-header {
    grid-template-columns: 1fr;
    gap: 26px;
    align-items: start;
  }

  .paper-summary {
    max-width: none;
  }

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

  .paper-points li,
  .paper-points li:nth-child(4),
  .paper-points li:nth-child(5) {
    grid-column: auto;
  }
}

@media (max-width: 780px) {
  .hero {
    padding: 48px 16px 56px;
  }

  .hero-content {
    max-width: calc(100vw - 32px);
    gap: 30px;
  }

  .hero h1 {
    font-size: clamp(2rem, 8.5vw, 2.72rem);
    word-break: keep-all;
  }

  .hero-lede {
    max-width: 100%;
  }

  .section {
    padding-top: 76px;
    padding-bottom: 76px;
  }

  .section-heading {
    margin-bottom: 32px;
  }

  .feature-card h3 {
    margin-top: 34px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .feature-card {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid rgba(185, 200, 214, 0.62);
  }

  .feature-card:last-child {
    border-bottom: 0;
  }

  .hero-media img {
    margin-top: -8px;
    margin-bottom: -8px;
  }

  #versions .section-heading {
    text-align: left;
  }
}

@media (max-width: 420px) {
  .hero h1 {
    font-size: 1.98rem;
  }

  .hero-facts div {
    padding: 14px;
  }
}

/* Content refinement: integrated trial selection and notes */
@media (min-width: 1200px) {
  .hero-content {
    grid-template-columns: minmax(340px, 420px) minmax(760px, 1fr);
  }

  .hero-media {
    width: min(860px, 60vw);
    margin-right: 0;
    transform: none;
  }
}

#demos .section-heading {
  display: grid;
  max-width: var(--max);
  margin-right: auto;
  margin-left: auto;
  grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
  column-gap: 64px;
  row-gap: 10px;
  align-items: center;
}

#demos .section-heading .section-label,
#demos .section-heading h2 {
  grid-column: 1;
}

#demos .section-heading h2 {
  font-size: clamp(2.1rem, 3.4vw, 3.08rem);
}

#demos .section-heading p {
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: center;
  max-width: none;
  margin: 0;
  padding: 14px 0 14px 24px;
  border-left: 3px solid rgba(18, 124, 128, 0.28);
  color: #526176;
  font-size: 1.04rem;
  line-height: 2;
}

.paper-points {
  max-width: none;
  margin-top: 34px;
}

.paper-points h3 {
  margin: 0 0 18px;
  color: #fff;
  font-size: 1.26rem;
  line-height: 1.25;
}

.paper-points ol {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: paper-point;
}

.paper-points li {
  position: relative;
  grid-column: span 4;
  min-height: 220px;
  padding: 24px 22px 22px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.075), rgba(255, 255, 255, 0.045));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
  counter-increment: paper-point;
}

.paper-points li:nth-child(4) {
  grid-column: 3 / span 4;
}

.paper-points li:nth-child(5) {
  grid-column: 7 / span 4;
}

.paper-points li::before {
  content: counter(paper-point, decimal-leading-zero);
  display: inline-flex;
  width: 38px;
  height: 28px;
  align-items: center;
  justify-content: center;
  margin-bottom: 28px;
  border-radius: 999px;
  background: rgba(134, 239, 224, 0.12);
  color: #86efe0;
  font-size: 0.78rem;
  font-weight: 900;
}

.paper-points strong {
  display: block;
  color: #fff;
  font-size: 1.02rem;
  line-height: 1.35;
}

.paper-points span {
  display: block;
  margin-top: 12px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.92rem;
  line-height: 1.72;
}

.paper-proof-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  max-width: none;
  margin-top: 28px;
  overflow: hidden;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 0;
  background: transparent;
}

.paper-proof-row div {
  min-height: 106px;
  padding: 20px 18px;
  border-right: 1px solid rgba(255, 255, 255, 0.11);
  background: rgba(255, 255, 255, 0.035);
}

.paper-proof-row div:last-child {
  border-right: 0;
}

.paper-proof-row strong,
.paper-proof-row span {
  display: block;
}

.paper-proof-row strong {
  color: #fff;
  font-size: 1.04rem;
  font-weight: 850;
  line-height: 1.3;
}

.paper-proof-row span {
  margin-top: 10px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.84rem;
  line-height: 1.55;
  overflow-wrap: anywhere;
}

.paper-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  max-width: none;
  margin-top: 34px;
}

.paper-figures figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background: #fff;
}

.paper-figures img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  background: #fff;
}

.paper-figures figcaption {
  padding: 12px 14px 14px;
  border-top: 1px solid #e6edf2;
  color: #425063;
  font-size: 0.82rem;
  line-height: 1.55;
}

.config-strip {
  max-width: var(--max);
  display: flex;
  gap: 10px;
  margin-top: 20px;
  padding: 18px 20px;
  border: 1px solid rgba(184, 196, 210, 0.76);
  border-radius: 8px;
  background: #f7fafc;
  color: #5f6b7d;
  font-size: 0.95rem;
  line-height: 1.7;
}

.config-strip strong {
  flex: 0 0 auto;
  color: var(--ink);
}

.trial-notes {
  margin-top: 24px;
}

.download-anchor {
  position: relative;
  top: -90px;
  height: 0;
}

#versions .contact-strip {
  max-width: var(--max);
  margin-top: 20px;
}

@media (max-width: 780px) {
  .site-nav {
    gap: 20px;
    font-size: 1.04rem;
  }
}

@media (max-width: 780px) {
  #demos .section-heading,
  #versions .section-heading {
    display: block;
  }

  #demos .section-heading p,
  #versions .section-heading p {
    max-width: none;
    margin-top: 16px;
    padding: 0;
    border-left: 0;
  }

  .application-panel,
  .audience-panel {
    padding: 20px;
  }

  .application-grid,
  .audience-list {
    grid-template-columns: 1fr;
  }

  .paper-proof-row,
  .paper-points ol,
  .paper-points li,
  .config-strip {
    display: block;
  }

  .paper-header {
    padding-bottom: 26px;
  }

  .paper-title-block h2 {
    max-width: none;
    font-size: clamp(2.1rem, 8.9vw, 2.35rem);
  }

  .paper-summary {
    padding: 0 0 0 18px;
    border-left-color: rgba(134, 239, 224, 0.36);
  }

  .paper-figures {
    grid-template-columns: 1fr;
  }

  .paper-proof-row div + div {
    border-top: 1px solid rgba(255, 255, 255, 0.14);
  }

  .paper-points li {
    min-height: auto;
  }

  .paper-points li + li {
    margin-top: 12px;
  }

  .paper-points strong,
  .paper-points span,
  .config-strip span {
    display: block;
  }

  .paper-points span,
  .config-strip span {
    margin-top: 6px;
  }

  .paper-points li::before,
  .paper-points span {
    grid-column: auto;
    grid-row: auto;
  }
}