@font-face {
  font-family: InterVar;
  src: local("Inter"), local("Inter var");
  font-display: swap;
}

:root {
  --bg: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --border: #e2e8f0;
  --soft: #f8fafc;
  --brand: #2563eb;
  --brand-2: #0ea5e9;
  --shadow: 0 10px 30px rgba(2, 6, 23, 0.08);
  --radius: 14px;
  --radius-sm: 10px;
  --container: 1160px;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: InterVar, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #f3f7ff 0%, #ffffff 30%, #ffffff 100%);
}

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

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

.container {
  width: min(var(--container), calc(100% - 40px));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.7);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0.2px;
}

.brand-badge {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: radial-gradient(120% 120% at 20% 20%, #60a5fa 0%, #2563eb 35%, #0ea5e9 100%);
  box-shadow: 0 10px 22px rgba(37, 99, 235, 0.25);
}

.brand span {
  font-size: 16px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
}

.nav-link {
  padding: 10px 10px;
  border-radius: 10px;
  color: var(--muted);
  font-weight: 600;
}

.nav-link:hover {
  color: var(--text);
  background: rgba(15, 23, 42, 0.04);
}

.nav-link.active {
  color: var(--brand);
  background: rgba(37, 99, 235, 0.08);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #fff;
  font-weight: 700;
  color: var(--text);
  cursor: pointer;
}

.btn:hover {
  box-shadow: 0 10px 24px rgba(2, 6, 23, 0.08);
  transform: translateY(-1px);
}

.btn-primary {
  border-color: rgba(37, 99, 235, 0.35);
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.08) 0%, rgba(37, 99, 235, 0.02) 100%);
  color: var(--brand);
}

.btn-solid {
  border: none;
  background: linear-gradient(135deg, #2563eb 0%, #0ea5e9 100%);
  color: #fff;
  box-shadow: 0 16px 30px rgba(37, 99, 235, 0.22);
}

.btn-solid:hover {
  box-shadow: 0 18px 40px rgba(37, 99, 235, 0.28);
}

.mobile-toggle {
  display: none;
}

.mobile-panel {
  display: none;
  border-top: 1px solid rgba(226, 232, 240, 0.7);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
}

.mobile-panel a {
  display: block;
  padding: 14px 20px;
  border-bottom: 1px solid rgba(226, 232, 240, 0.6);
  color: var(--muted);
  font-weight: 700;
}

.mobile-panel a.active {
  color: var(--brand);
  background: rgba(37, 99, 235, 0.08);
}

main {
  min-height: calc(100vh - 72px - 260px);
}

.hero {
  padding: 48px 0 22px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 26px;
  align-items: stretch;
}

.hero-card {
  border-radius: 22px;
  border: 1px solid rgba(226, 232, 240, 0.9);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.95) 0%, rgba(248, 250, 252, 0.92) 100%);
  box-shadow: var(--shadow);
  padding: 28px;
  overflow: hidden;
  position: relative;
}

.hero-card::before {
  content: "";
  position: absolute;
  inset: -20% -20% auto auto;
  width: 280px;
  height: 280px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 30%, rgba(96, 165, 250, 0.45) 0%, rgba(37, 99, 235, 0.12) 45%, rgba(14, 165, 233, 0.06) 70%, rgba(255, 255, 255, 0) 72%);
  filter: blur(2px);
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(37, 99, 235, 0.18);
  background: rgba(37, 99, 235, 0.06);
  color: var(--brand);
  padding: 8px 10px;
  border-radius: 999px;
  font-weight: 800;
  letter-spacing: 0.2px;
}

.hero h1 {
  margin: 14px 0 10px;
  font-size: 40px;
  line-height: 1.1;
  letter-spacing: -0.6px;
}

.hero p {
  margin: 0;
  color: var(--muted);
  font-weight: 600;
  line-height: 1.65;
}

.hero-actions {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-note {
  margin-top: 14px;
  color: #64748b;
  font-size: 13px;
  font-weight: 700;
}

.slider {
  height: 100%;
  min-height: 280px;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 12px;
}

.slider-frame {
  border-radius: 18px;
  border: 1px solid rgba(226, 232, 240, 0.9);
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.08) 0%, rgba(14, 165, 233, 0.06) 30%, rgba(255, 255, 255, 0.8) 100%);
  overflow: hidden;
  position: relative;
  box-shadow: 0 14px 26px rgba(2, 6, 23, 0.08);
}

.slide {
  position: absolute;
  inset: 0;
  padding: 18px 18px 16px;
  opacity: 0;
  transform: translateX(10px);
  transition: opacity 380ms ease, transform 380ms ease;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.slide.active {
  opacity: 1;
  transform: translateX(0);
}

.slide h3 {
  margin: 0;
  font-size: 16px;
}

.slide p {
  margin: 6px 0 0;
  color: var(--muted);
  font-weight: 600;
  font-size: 13px;
  line-height: 1.6;
}

.slide-ill {
  margin-top: 14px;
  border-radius: 14px;
  border: 1px solid rgba(226, 232, 240, 0.9);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.16) 0%, rgba(14, 165, 233, 0.14) 40%, rgba(255, 255, 255, 0.65) 100%);
  position: relative;
  overflow: hidden;
  height: 132px;
}

.slide-ill::before,
.slide-ill::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  filter: blur(0.5px);
  opacity: 0.9;
}

.slide-ill::before {
  width: 120px;
  height: 120px;
  left: -18px;
  bottom: -28px;
  background: radial-gradient(circle at 30% 30%, rgba(96, 165, 250, 0.8) 0%, rgba(37, 99, 235, 0.25) 55%, rgba(255, 255, 255, 0) 60%);
}

.slide-ill::after {
  width: 160px;
  height: 160px;
  right: -44px;
  top: -54px;
  background: radial-gradient(circle at 30% 30%, rgba(14, 165, 233, 0.7) 0%, rgba(37, 99, 235, 0.18) 55%, rgba(255, 255, 255, 0) 62%);
}

.slider-dots {
  display: flex;
  gap: 8px;
  justify-content: center;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  border: 1px solid rgba(37, 99, 235, 0.35);
  background: rgba(37, 99, 235, 0.12);
}

.dot.active {
  width: 22px;
  background: linear-gradient(135deg, #2563eb 0%, #0ea5e9 100%);
  border-color: rgba(37, 99, 235, 0.35);
}

.section {
  padding: 28px 0;
}

.section-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.section-title h2 {
  margin: 0;
  font-size: 22px;
  letter-spacing: -0.3px;
}

.section-title p {
  margin: 0;
  color: var(--muted);
  font-weight: 650;
  font-size: 14px;
}

.grid-5 {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}

.metric {
  border-radius: var(--radius);
  border: 1px solid rgba(226, 232, 240, 0.9);
  background: rgba(255, 255, 255, 0.85);
  padding: 14px 14px 12px;
}

.metric strong {
  display: block;
  font-size: 18px;
  letter-spacing: -0.3px;
}

.metric span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-weight: 650;
  font-size: 13px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.card {
  border-radius: var(--radius);
  border: 1px solid rgba(226, 232, 240, 0.9);
  background: rgba(255, 255, 255, 0.92);
  overflow: hidden;
  box-shadow: 0 10px 22px rgba(2, 6, 23, 0.06);
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 36px rgba(2, 6, 23, 0.1);
}

.card-media {
  height: 150px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.18) 0%, rgba(14, 165, 233, 0.16) 45%, rgba(255, 255, 255, 0.85) 100%);
  position: relative;
}

.card-media::before {
  content: "";
  position: absolute;
  inset: 14px;
  border-radius: 14px;
  border: 1px dashed rgba(37, 99, 235, 0.28);
}

.card-body {
  padding: 14px 14px 16px;
}

.card-body h3 {
  margin: 0;
  font-size: 15px;
  line-height: 1.35;
}

.card-body p {
  margin: 8px 0 0;
  color: var(--muted);
  font-weight: 650;
  font-size: 13px;
  line-height: 1.6;
}

.tag-row {
  display: flex;
  gap: 8px;
  margin-top: 10px;
  flex-wrap: wrap;
}

.tag {
  font-size: 12px;
  font-weight: 800;
  color: var(--brand);
  border: 1px solid rgba(37, 99, 235, 0.18);
  background: rgba(37, 99, 235, 0.06);
  padding: 6px 10px;
  border-radius: 999px;
}

.split {
  display: grid;
  grid-template-columns: 1fr 0.38fr;
  gap: 16px;
  align-items: start;
}

.sidebar {
  position: sticky;
  top: 92px;
  border-radius: var(--radius);
  border: 1px solid rgba(226, 232, 240, 0.9);
  background: rgba(255, 255, 255, 0.92);
  padding: 14px;
}

.side-block + .side-block {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid rgba(226, 232, 240, 0.75);
}

.side-title {
  font-weight: 900;
  margin: 0 0 10px;
  font-size: 14px;
}

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

.input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  font-weight: 650;
  outline: none;
}

.input:focus {
  border-color: rgba(37, 99, 235, 0.45);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.list {
  display: grid;
  gap: 10px;
}

.list-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 12px;
  align-items: start;
  padding: 12px;
  border-radius: var(--radius);
  border: 1px solid rgba(226, 232, 240, 0.9);
  background: rgba(248, 250, 252, 0.7);
}

.thumb {
  height: 88px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.16) 0%, rgba(14, 165, 233, 0.14) 45%, rgba(255, 255, 255, 0.9) 100%);
  border: 1px solid rgba(226, 232, 240, 0.9);
}

.item-meta h3 {
  margin: 0;
  font-size: 15px;
  line-height: 1.35;
}

.item-meta p {
  margin: 6px 0 0;
  color: var(--muted);
  font-weight: 650;
  font-size: 13px;
  line-height: 1.65;
}

.pagination {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.page {
  border: 1px solid rgba(226, 232, 240, 0.9);
  background: rgba(255, 255, 255, 0.92);
  padding: 8px 12px;
  border-radius: 12px;
  font-weight: 800;
  color: var(--muted);
}

.page:hover {
  color: var(--text);
  box-shadow: 0 10px 22px rgba(2, 6, 23, 0.06);
}

.page.active {
  color: var(--brand);
  background: rgba(37, 99, 235, 0.08);
  border-color: rgba(37, 99, 235, 0.25);
}

.faq {
  display: grid;
  gap: 10px;
}

details.faq-item {
  border-radius: var(--radius);
  border: 1px solid rgba(226, 232, 240, 0.9);
  background: rgba(255, 255, 255, 0.92);
  padding: 12px 14px;
}

details.faq-item summary {
  cursor: pointer;
  font-weight: 900;
  list-style: none;
}

details.faq-item summary::-webkit-details-marker {
  display: none;
}

details.faq-item p {
  margin: 10px 0 0;
  color: var(--muted);
  font-weight: 650;
  line-height: 1.75;
  font-size: 14px;
}

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

.dl-card {
  border-radius: var(--radius);
  border: 1px solid rgba(226, 232, 240, 0.9);
  background: rgba(255, 255, 255, 0.92);
  padding: 14px;
  box-shadow: 0 10px 22px rgba(2, 6, 23, 0.06);
}

.dl-card h3 {
  margin: 0;
  font-size: 16px;
}

.dl-card p {
  margin: 8px 0 12px;
  color: var(--muted);
  font-weight: 650;
  font-size: 13px;
  line-height: 1.65;
}

.dl-card .btn {
  width: 100%;
}

.page-hero {
  padding: 32px 0 14px;
}

.page-hero h1 {
  margin: 0 0 10px;
  font-size: 30px;
  letter-spacing: -0.4px;
}

.page-hero p {
  margin: 0;
  color: var(--muted);
  font-weight: 650;
  line-height: 1.7;
}

.article {
  border-radius: 18px;
  border: 1px solid rgba(226, 232, 240, 0.9);
  background: rgba(255, 255, 255, 0.92);
  padding: 18px;
  box-shadow: 0 14px 26px rgba(2, 6, 23, 0.08);
}

.article h1 {
  margin: 0 0 10px;
  font-size: 28px;
  letter-spacing: -0.4px;
}

.article .meta {
  color: #64748b;
  font-weight: 750;
  font-size: 13px;
}

.article p {
  margin: 12px 0 0;
  color: #1f2937;
  line-height: 1.9;
  font-weight: 600;
}

.footer {
  margin-top: 34px;
  padding: 26px 0;
  border-top: 1px solid rgba(226, 232, 240, 0.8);
  background: rgba(248, 250, 252, 0.75);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 18px;
  align-items: start;
}

.footer p {
  margin: 10px 0 0;
  color: var(--muted);
  font-weight: 650;
  line-height: 1.8;
  font-size: 14px;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.links a {
  color: #334155;
  font-weight: 750;
  font-size: 13px;
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid rgba(226, 232, 240, 0.85);
  background: rgba(255, 255, 255, 0.85);
}

.links a:hover {
  border-color: rgba(37, 99, 235, 0.25);
  color: var(--brand);
}

@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .grid-5 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .cards {
    grid-template-columns: 1fr;
  }
  .split {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: relative;
    top: auto;
  }
  .download-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .nav-links {
    display: none;
  }
  .mobile-toggle {
    display: inline-flex;
  }
  .hero h1 {
    font-size: 32px;
  }
  .download-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .links {
    justify-content: flex-start;
  }
  .list-item {
    grid-template-columns: 1fr;
  }
}