:root {
  color-scheme: light;
  --bg: #edf2f7;
  --panel: rgba(255, 255, 255, 0.84);
  --panel-strong: rgba(255, 255, 255, 0.96);
  --line: rgba(15, 23, 42, 0.08);
  --text: #0f172a;
  --muted: #5e6c7e;
  --accent: #111827;
  --accent-soft: #eef3f9;
  --blue: #1668ff;
  --blue-soft: rgba(22, 104, 255, 0.14);
  --cyan-soft: rgba(72, 194, 255, 0.12);
  --shadow: 0 24px 80px rgba(15, 23, 42, 0.12);
  --radius-xl: 34px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --max-width: 1240px;
  --font-display: "SF Pro Display", "PingFang SC", "Helvetica Neue", sans-serif;
  --font-body: "SF Pro Text", "PingFang SC", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  color: var(--text);
  font-family: var(--font-body);
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.4) 28%, transparent 52%),
    linear-gradient(180deg, #fbfdff 0%, #f2f5f9 48%, #ebf0f6 100%);
}

body {
  overflow-x: hidden;
}

.page-shell {
  position: relative;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 16px 52px;
}

.product-page-shell {
  padding-top: 20px;
}

.hub-shell {
  max-width: 1360px;
}

.orb {
  position: fixed;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  filter: blur(92px);
  z-index: 0;
  pointer-events: none;
}

.orb-a {
  top: -120px;
  left: -120px;
  background: var(--blue-soft);
}

.orb-b {
  top: 180px;
  right: -120px;
  background: var(--cyan-soft);
}

.masthead,
.content {
  position: relative;
  z-index: 1;
}

.brand-row,
.cta-row,
.top-links,
.status-row,
.support-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.brand-row {
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
}

.brand-block {
  display: grid;
  gap: 14px;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand-lockup-compact {
  align-items: center;
  gap: 18px;
}

.brand-logo {
  width: min(420px, 46vw);
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
  filter: drop-shadow(0 18px 40px rgba(15, 23, 42, 0.12));
}

.brand-logo-compact {
  width: min(260px, 28vw);
}

.brand-copy {
  display: grid;
  gap: 10px;
}

.brand-copy-compact {
  gap: 8px;
}

.brand-copy h1 {
  max-width: 10ch;
}

.brand-copy-compact h1 {
  max-width: 9ch;
  font-size: clamp(29px, 3.85vw, 46px);
}

.brand-tagline {
  margin: 0;
  font-size: clamp(18px, 2vw, 24px);
  color: var(--muted);
  letter-spacing: 0.02em;
}

.brand-tagline-compact {
  font-size: clamp(16px, 1.7vw, 21px);
}

.top-links {
  gap: 18px;
  padding-top: 18px;
}

.top-links a {
  color: var(--muted);
  text-decoration: none;
}

.hero-grid,
.capability-grid,
.split-grid,
.workflow-grid,
.spec-grid,
.hub-hero-grid,
.hub-meta-grid {
  display: grid;
  gap: 14px;
}

.hub-hero-grid {
  grid-template-columns: minmax(0, 1.1fr) repeat(2, minmax(0, 0.62fr));
  margin-top: 26px;
}

.hub-meta-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}

.hero-grid {
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  margin-top: 18px;
}

.product-hero-grid {
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
}

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

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

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

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

.hero-panel,
.card,
.capability-card,
.spec-card,
.hub-card {
  border: 1px solid var(--line);
  background: var(--panel);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.hero-panel,
.card {
  border-radius: var(--radius-xl);
  padding: 20px;
}

.hub-card {
  border-radius: var(--radius-xl);
  padding: 26px;
}

.capability-card,
.spec-card {
  border-radius: var(--radius-lg);
  padding: 16px;
}

.eyebrow {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

h1,
h2 {
  margin: 0;
  font-family: var(--font-display);
  letter-spacing: -0.04em;
}

h1 {
  font-size: clamp(42px, 5vw, 66px);
  line-height: 0.96;
}

h2 {
  font-size: clamp(26px, 3vw, 36px);
}

.hero-kicker {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-text,
.release-summary,
.capability-card p,
.download-card p,
.faq-item p,
.workflow-step p,
.support-box p,
.hero-meta {
  color: var(--muted);
  line-height: 1.75;
}

.hero-text {
  margin: 14px 0 0;
  font-size: 17px;
}

.hero-copy-wide {
  min-height: 100%;
}

.cta-row {
  margin-top: 20px;
}

.primary-btn,
.secondary-btn,
.inline-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 14px 22px;
  text-decoration: none;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    background-color 160ms ease;
}

.primary-btn {
  background: linear-gradient(180deg, #1c263a 0%, #0f172a 100%);
  color: #fff;
  box-shadow: 0 16px 34px rgba(15, 23, 42, 0.24);
}

.secondary-btn,
.inline-link {
  background: var(--accent-soft);
  color: var(--accent);
}

.primary-btn:hover,
.secondary-btn:hover,
.inline-link:hover {
  transform: translateY(-1px);
}

.hero-meta {
  margin-top: 16px;
  font-size: 14px;
}

.status-row {
  align-items: center;
  color: var(--muted);
  font-size: 14px;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1668ff 0%, #4ac7ff 100%);
  box-shadow: 0 0 0 6px rgba(22, 104, 255, 0.16);
}

.release-version {
  margin-top: 14px;
  font-family: var(--font-display);
  font-size: 48px;
  letter-spacing: -0.05em;
}

.hub-version {
  margin-top: 18px;
  font-family: var(--font-display);
  font-size: clamp(28px, 2.6vw, 34px);
  line-height: 1.14;
  letter-spacing: -0.04em;
}

.release-summary {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.68;
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.meta-grid div,
.download-card,
.checksum-card,
.workflow-step,
.faq-item,
.support-box,
.hub-meta-grid div {
  border: 1px solid rgba(15, 23, 42, 0.06);
  background: var(--panel-strong);
}

.meta-grid div {
  padding: 14px;
  border-radius: var(--radius-md);
}

.hub-meta-grid div {
  padding: 14px;
  border-radius: var(--radius-md);
}

.meta-grid span,
.checksum-card span,
.spec-card span,
.workflow-step span,
.hub-meta-grid span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.meta-grid strong,
.spec-card strong,
.hub-meta-grid strong {
  display: block;
  margin-top: 8px;
  font-size: 17px;
  line-height: 1.5;
}

.content {
  display: grid;
  gap: 14px;
  margin-top: 14px;
}

.product-content {
  gap: 14px;
}

.capability-card strong,
.download-card strong,
.faq-item strong,
.workflow-step strong,
.support-box strong {
  display: block;
  font-size: 16px;
}

.section-head {
  margin-bottom: 14px;
}

.download-stack,
.notes-list,
.faq-list {
  display: grid;
  gap: 12px;
}

.download-card,
.checksum-card {
  display: grid;
  gap: 10px;
  padding: 15px;
  border-radius: var(--radius-md);
}

.download-usage {
  display: grid;
  gap: 6px;
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
}

.download-usage li {
  position: relative;
  padding-left: 16px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.download-usage li::before {
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(135deg, #1668ff 0%, #4ac7ff 100%);
  content: "";
}

.inline-link {
  justify-self: start;
  padding: 11px 18px;
  font-size: 14px;
}

.checksum-card code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  word-break: break-all;
  line-height: 1.7;
}

.notes-list p {
  margin: 0;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid rgba(15, 23, 42, 0.06);
  background: var(--panel-strong);
  color: var(--muted);
  line-height: 1.7;
}

.workflow-step {
  padding: 15px;
  border-radius: var(--radius-lg);
}

.workflow-step span {
  margin-bottom: 8px;
}

.workflow-step p {
  margin: 8px 0 0;
}

.spec-card {
  min-height: 112px;
}

.faq-item,
.support-box {
  padding: 15px;
  border-radius: var(--radius-md);
}

.poster-section {
  min-width: 0;
}

.poster-card {
  overflow: hidden;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.7));
  box-shadow: var(--shadow);
}

.product-poster {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: calc(var(--radius-xl) - 1px);
  background: #f8fafc;
}

.faq-item p,
.support-box p {
  margin: 8px 0 0;
}

.support-pills {
  margin-top: 14px;
}

.hub-pills {
  margin-top: 24px;
}

.support-pills span {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
}

.wechat-contact-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 16px;
  margin-top: 22px;
  padding: 14px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 24px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(239, 247, 255, 0.72)),
    radial-gradient(circle at top left, rgba(22, 104, 255, 0.12), transparent 42%);
  box-shadow: 0 18px 48px rgba(15, 23, 42, 0.1);
}

.wechat-qr-button {
  display: grid;
  gap: 7px;
  justify-items: center;
  width: 126px;
  padding: 10px;
  border: 0;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--muted);
  cursor: zoom-in;
  box-shadow: inset 0 0 0 1px rgba(15, 23, 42, 0.07);
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    background-color 180ms ease;
}

.wechat-qr-button:hover {
  transform: translateY(-2px) scale(1.015);
  background: #fff;
  box-shadow:
    inset 0 0 0 1px rgba(22, 104, 255, 0.16),
    0 14px 30px rgba(15, 23, 42, 0.12);
}

.wechat-qr-button span {
  font-size: 12px;
  letter-spacing: 0.06em;
}

.wechat-qr {
  display: block;
  width: 96px;
  height: 96px;
  object-fit: contain;
}

.wechat-contact-copy {
  display: grid;
  gap: 5px;
  min-width: 0;
}

.wechat-contact-copy strong {
  color: var(--text);
  font-size: 15px;
  line-height: 1.45;
}

.wechat-contact-copy p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.wechat-contact-copy a {
  width: fit-content;
  max-width: 100%;
  color: #1456d9;
  font-size: 13px;
  line-height: 1.35;
  text-decoration: none;
  word-break: break-all;
}

.wechat-contact-copy a:hover {
  text-decoration: underline;
}

.qr-modal-open {
  overflow: hidden;
}

.qr-lightbox {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(15, 23, 42, 0.46);
  backdrop-filter: blur(18px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease;
}

.qr-lightbox.is-open {
  opacity: 1;
  pointer-events: auto;
}

.qr-lightbox-panel {
  position: relative;
  display: grid;
  justify-items: center;
  gap: 14px;
  width: min(520px, 92vw);
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 34px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(245, 249, 255, 0.94)),
    radial-gradient(circle at top, rgba(22, 104, 255, 0.14), transparent 50%);
  box-shadow: 0 30px 90px rgba(15, 23, 42, 0.28);
  transform: translateY(14px) scale(0.96);
  transition: transform 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.qr-lightbox.is-open .qr-lightbox-panel {
  transform: translateY(0) scale(1);
}

.qr-lightbox img {
  display: block;
  width: min(360px, 72vw);
  height: auto;
}

.qr-lightbox-title {
  margin: 0;
  color: var(--text);
  font-size: 18px;
  font-weight: 700;
}

.qr-lightbox-hint {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.qr-lightbox-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.08);
  color: var(--text);
  cursor: pointer;
  font-size: 22px;
  line-height: 1;
}

@media (max-width: 1080px) {
  .hero-grid,
  .hub-hero-grid,
  .split-grid,
  .capability-grid,
  .workflow-grid,
  .spec-grid {
    grid-template-columns: 1fr;
  }

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

  .top-links {
    padding-top: 0;
  }
}

@media (max-width: 820px) {
  .brand-lockup {
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
  }

  .brand-logo {
    width: min(340px, 84vw);
  }

  .brand-logo-compact {
    width: min(280px, 72vw);
  }

  .brand-copy h1 {
    max-width: none;
  }

  .brand-copy-compact h1 {
    max-width: none;
  }
}

@media (max-width: 680px) {
  .page-shell {
    padding: 18px 14px 48px;
  }

  .hero-panel,
  .card,
  .capability-card,
  .spec-card,
  .hub-card {
    padding: 18px;
  }

  h1 {
    font-size: 36px;
  }

  .meta-grid,
  .hub-meta-grid {
    grid-template-columns: 1fr;
  }

  .cta-row,
  .top-links {
    flex-direction: column;
  }

  .primary-btn,
  .secondary-btn,
  .inline-link {
    width: 100%;
  }

  .wechat-contact-card {
    grid-template-columns: 1fr;
  }

  .wechat-qr-button {
    width: 100%;
  }

  .wechat-qr {
    width: 132px;
    height: 132px;
  }
}