:root {
  --bg: #081018;
  --panel: rgba(255, 255, 255, 0.06);
  --panel-strong: rgba(255, 255, 255, 0.1);
  --panel-soft: rgba(255, 255, 255, 0.04);
  --text: #f4f7fb;
  --muted: #b4bfd0;
  --line: rgba(255, 255, 255, 0.12);
  --brand: #1c8cff;
  --brand-2: #56b4ff;
  --brand-soft: rgba(28, 140, 255, 0.14);
  --accent: #7ce0c1;
  --accent-soft: rgba(124, 224, 193, 0.1);
  --shadow: 0 28px 90px rgba(0, 0, 0, 0.32);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(28, 140, 255, 0.24), transparent 24%),
    radial-gradient(circle at 85% 12%, rgba(124, 224, 193, 0.18), transparent 18%),
    radial-gradient(circle at bottom right, rgba(255, 255, 255, 0.08), transparent 16%),
    linear-gradient(180deg, #081018 0%, #0e1827 100%);
}

.page-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 52px;
}

.site-header,
.hero-card,
.metrics-row,
.section-block,
.site-footer {
  border: 1px solid var(--line);
  background: var(--panel);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 24px;
  border-radius: 24px;
}

.brand-block {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  border-radius: 18px;
  background: linear-gradient(135deg, #0f60f0, #43b0ff);
  font-weight: 700;
  color: #fff;
  letter-spacing: 1px;
}

.brand-block h1,
.hero-copy h2,
.section-head h3,
.tool-card h4,
.workflow-card h4,
.faq-item h4,
.contact-card h4,
.audience-card h4 {
  margin: 0;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.lang-switch {
  display: flex;
  gap: 10px;
}

.lang-switch a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 52px;
  min-height: 36px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
  background: rgba(255, 255, 255, 0.03);
  text-decoration: none;
  font-size: 13px;
}

.lang-switch a.active,
.lang-switch a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
}

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

.eyebrow {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: #95ceff;
}

.hero-card {
  margin-top: 22px;
  border-radius: 34px;
  padding: 38px;
  display: grid;
  gap: 26px;
  grid-template-columns: 1.32fr 0.88fr;
}

.hero-copy h2 {
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.08;
  max-width: 760px;
}

.hero-text,
.section-head p,
.tool-card p,
.workflow-card p,
.faq-item p,
.contact-card p,
.qr-card p,
.metric-card p,
.audience-card p,
.download-note p,
.site-footer p {
  color: var(--muted);
  line-height: 1.85;
}

.hero-text {
  max-width: 760px;
  margin-top: 18px;
  font-size: 17px;
}

.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.primary-btn,
.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  transition: transform 150ms ease, opacity 150ms ease, background 150ms ease;
}

.primary-btn {
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
}

.secondary-btn {
  color: var(--text);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.primary-btn:hover,
.secondary-btn:hover {
  transform: translateY(-1px);
  opacity: 0.95;
}

.hero-aside {
  display: grid;
  gap: 14px;
}

.hero-stat,
.metric-card,
.tool-card,
.audience-card,
.workflow-card,
.faq-item,
.contact-card,
.qr-card,
.download-note {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(0, 0, 0, 0.18);
}

.hero-stat {
  padding: 18px 18px 20px;
}

.hero-stat span,
.metric-card span,
.workflow-card span {
  display: block;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #8fa5c2;
}

.hero-stat strong,
.metric-card strong {
  display: block;
  margin-top: 10px;
  font-size: 19px;
  line-height: 1.5;
}

.metrics-row {
  margin-top: 22px;
  border-radius: 28px;
  padding: 18px;
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.metric-card {
  padding: 20px;
}

.metric-card p {
  margin: 12px 0 0;
}

.section-block {
  margin-top: 24px;
  padding: 32px;
  border-radius: 30px;
}

.alt-block {
  background:
    linear-gradient(180deg, rgba(28, 140, 255, 0.08), rgba(255, 255, 255, 0.04)),
    var(--panel);
}

.accent-block {
  background:
    linear-gradient(180deg, rgba(124, 224, 193, 0.08), rgba(255, 255, 255, 0.04)),
    var(--panel);
}

.section-head {
  margin-bottom: 24px;
}

.section-head h3 {
  margin-bottom: 10px;
  font-size: 31px;
}

.section-head p {
  max-width: 860px;
}

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

.tool-card,
.audience-card,
.workflow-card,
.faq-item,
.contact-card,
.qr-card {
  padding: 22px;
}

.tool-card.featured {
  background:
    linear-gradient(180deg, rgba(28, 140, 255, 0.12), rgba(0, 0, 0, 0.2)),
    rgba(0, 0, 0, 0.18);
}

.tool-tag {
  display: inline-flex;
  margin-bottom: 14px;
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: #abd9ff;
  font-size: 13px;
}

.tool-card ul {
  margin: 16px 0 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.9;
}

.tool-highlight {
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.04);
  color: #d8e8f8;
  line-height: 1.75;
}

.product-block {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(28, 140, 255, 0.03)),
    var(--panel);
}

.product-list {
  display: grid;
  gap: 16px;
}

.product-item {
  display: grid;
  gap: 14px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.03);
}

.product-main h4 {
  margin: 0 0 8px;
  font-size: 22px;
}

.product-main p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.product-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.product-meta span {
  display: inline-flex;
  padding: 9px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: #d8e9fb;
  font-size: 13px;
}

.sales-block {
  background:
    linear-gradient(180deg, rgba(124, 224, 193, 0.06), rgba(255, 255, 255, 0.03)),
    var(--panel);
}

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

.sales-point {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.03);
}

.sales-point h4 {
  margin: 0 0 10px;
}

.sales-point p {
  margin: 0;
  color: var(--muted);
  line-height: 1.85;
}

.audience-card,
.workflow-card {
  background: rgba(255, 255, 255, 0.03);
}

.scenario-card {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background:
    linear-gradient(180deg, rgba(28, 140, 255, 0.08), rgba(255, 255, 255, 0.02)),
    rgba(0, 0, 0, 0.18);
}

.scenario-index {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: var(--brand-soft);
  color: #dff1ff;
  font-weight: 700;
  margin-bottom: 14px;
}

.workflow-card span {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  letter-spacing: 0;
  background: var(--brand-soft);
  color: #d7eeff;
  font-weight: 700;
}

.workflow-card h4 {
  margin-top: 16px;
}

.download-note {
  margin-top: 20px;
  padding: 20px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background:
    linear-gradient(180deg, rgba(124, 224, 193, 0.08), rgba(255, 255, 255, 0.03)),
    rgba(0, 0, 0, 0.18);
}

.download-note strong {
  display: block;
  margin-bottom: 8px;
}

.faq-list {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.faq-item {
  background: rgba(255, 255, 255, 0.03);
}

.faq-item p {
  margin-bottom: 0;
}

.timeline {
  display: grid;
  gap: 16px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 18px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.timeline-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.timeline-date {
  color: #9fd2ff;
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.timeline-content {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.03);
}

.timeline-content h4 {
  margin: 0 0 10px;
}

.timeline-content p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.contact-layout {
  display: grid;
  gap: 18px;
  grid-template-columns: 1.06fr 0.94fr;
}

.contact-card span {
  display: inline-block;
  min-width: 86px;
  color: #9bd1ff;
}

.contact-tip {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: 18px;
  background: var(--panel-soft);
}

.qr-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.qr-card img {
  width: min(100%, 300px);
  border-radius: 24px;
  background: #fff;
  padding: 10px;
}

.site-footer {
  margin-top: 24px;
  padding: 20px 24px;
  border-radius: 24px;
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.site-footer strong {
  display: block;
  margin-bottom: 8px;
}

.icp-line {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

.icp-line a {
  color: #9bd1ff;
  text-decoration: none;
}

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

@media (max-width: 980px) {
  .hero-card,
  .metrics-row,
  .tool-grid,
  .audience-grid,
  .workflow-grid,
  .scenario-grid,
  .sales-points,
  .faq-list,
  .contact-layout,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .download-note,
  .site-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .timeline-item {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .page-shell {
    width: min(100% - 20px, 100%);
    padding-top: 14px;
  }

  .site-header,
  .hero-card,
  .metrics-row,
  .section-block,
  .site-footer {
    padding: 20px;
    border-radius: 22px;
  }

  .hero-copy h2 {
    font-size: 32px;
  }
}