:root {
  --blue: #2457ff;
  --blue-700: #1740d2;
  --blue-100: #eaf0ff;
  --cyan: #16b8c8;
  --green: #16a36a;
  --amber: #d68a14;
  --ink: #111a33;
  --muted: #5d667a;
  --line: #dfe5ef;
  --soft: #f5f7fb;
  --white: #ffffff;
  --shadow: 0 16px 40px rgba(28, 48, 88, 0.12);
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: 0;
  overflow-x: clip;
}

body.nav-open {
  overflow: hidden;
}

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

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

h1,
h2,
h3,
p,
li,
td,
th,
button,
a {
  overflow-wrap: anywhere;
  word-break: break-word;
}

button,
input {
  font: inherit;
}

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

.notice {
  background: #edf3ff;
  border-bottom: 1px solid #dbe6ff;
  color: #33405d;
  font-size: 13px;
}

.notice .container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  gap: 8px;
  text-align: center;
}

.notice a {
  color: var(--blue-700);
  font-weight: 700;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid rgba(223, 229, 239, 0.9);
  backdrop-filter: blur(14px);
}

.header-inner {
  position: relative;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  min-width: 0;
}

.brand-mark {
  position: relative;
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--blue);
  box-shadow: 0 8px 20px rgba(36, 87, 255, 0.22);
}

.brand-mark::before,
.brand-mark::after {
  content: "";
  position: absolute;
  left: 10px;
  width: 18px;
  height: 7px;
  border: 2px solid #fff;
  transform: skewX(-22deg);
}

.brand-mark::before {
  top: 9px;
  border-bottom: 0;
}

.brand-mark::after {
  bottom: 9px;
  border-top: 0;
}

.brand-copy {
  display: grid;
  line-height: 1.25;
}

.brand-copy strong {
  font-size: 16px;
  white-space: nowrap;
}

.brand-copy small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 11px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 26px;
}

.site-nav > a {
  position: relative;
  color: #364059;
  font-size: 14px;
  font-weight: 600;
}

.site-nav > a:not(.header-cta)::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -24px;
  left: 0;
  height: 2px;
  background: var(--blue);
  transform: scaleX(0);
  transition: transform 0.2s ease;
}

.site-nav > a:hover,
.site-nav > a.active {
  color: var(--blue);
}

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

.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 17px;
  gap: 8px;
  color: #fff !important;
  background: var(--blue);
  border-radius: 6px;
  box-shadow: 0 7px 18px rgba(36, 87, 255, 0.2);
}

.header-cta:hover {
  background: var(--blue-700);
}

.nav-toggle {
  display: none;
  flex: 0 0 42px;
  margin-left: auto;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 19px;
  height: 2px;
  margin: 4px auto;
  background: var(--ink);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
}

.icon svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.hero,
.page-hero {
  position: relative;
  overflow: hidden;
  background-color: #edf3ff;
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
  isolation: isolate;
}

.hero::before,
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.99) 0%, rgba(255, 255, 255, 0.94) 37%, rgba(255, 255, 255, 0.64) 56%, rgba(255, 255, 255, 0.08) 82%);
}

.hero-inner {
  display: flex;
  align-items: center;
  min-height: 620px;
  padding: 64px 0 74px;
}

.page-hero .hero-inner {
  min-height: 470px;
}

.hero-copy {
  width: min(650px, 100%);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  margin: 0 0 18px;
  padding: 2px 11px;
  color: var(--blue-700);
  background: rgba(234, 240, 255, 0.9);
  border: 1px solid #cbd9ff;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 700;
}

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

h1,
h2,
h3 {
  line-height: 1.25;
  letter-spacing: 0;
}

h1 {
  max-width: 720px;
  margin-bottom: 22px;
  font-size: clamp(38px, 5vw, 62px);
}

.page-hero h1 {
  font-size: clamp(34px, 4.5vw, 52px);
}

.hero-lead {
  max-width: 650px;
  margin-bottom: 28px;
  color: #4b566d;
  font-size: 18px;
}

.hero-actions,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 21px;
  gap: 9px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  color: #fff;
  background: var(--blue);
  box-shadow: 0 9px 24px rgba(36, 87, 255, 0.23);
}

.btn-primary:hover {
  background: var(--blue-700);
}

.btn-secondary {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.92);
  border-color: #cdd5e2;
}

.btn-light {
  color: var(--blue-700);
  background: #fff;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin-top: 26px;
  color: #4c5870;
  font-size: 13px;
}

.hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-meta .icon {
  color: var(--green);
  width: 17px;
  height: 17px;
}

.path-strip {
  background: #0f1a36;
  color: #fff;
}

.path-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.path-item {
  padding: 27px 26px;
  border-right: 1px solid rgba(255, 255, 255, 0.12);
}

.path-item:last-child {
  border-right: 0;
}

.path-item strong {
  display: block;
  margin-bottom: 4px;
  font-size: 18px;
}

.path-item span {
  color: #b9c3db;
  font-size: 13px;
}

.section {
  padding: 94px 0;
}

.section-soft {
  background: var(--soft);
}

.section-dark {
  color: #fff;
  background: #101b38;
}

.section-head {
  max-width: 760px;
  margin: 0 auto 48px;
  text-align: center;
}

.section-head.left {
  margin-left: 0;
  text-align: left;
}

.kicker {
  margin-bottom: 10px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.section-head h2,
.split-copy h2,
.article-copy h2 {
  margin-bottom: 16px;
  font-size: clamp(29px, 3.5vw, 42px);
}

.section-head p,
.split-copy > p,
.article-copy > p {
  color: var(--muted);
}

.section-dark .section-head p,
.section-dark .split-copy > p {
  color: #b9c4dc;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1.03fr) minmax(0, 0.97fr);
  align-items: center;
  gap: 64px;
}

.split > *,
.article-grid > * {
  min-width: 0;
}

.split.reverse .media-frame {
  order: 2;
}

.split.reverse .split-copy {
  order: 1;
}

.media-frame {
  overflow: hidden;
  background: #f2f5fa;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.media-frame img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: contain;
}

.check-list,
.plain-list {
  display: grid;
  gap: 13px;
  padding: 0;
  margin: 24px 0 0;
  list-style: none;
}

.check-list li,
.plain-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: #3f4960;
}

.check-list .icon {
  width: 19px;
  height: 19px;
  margin-top: 4px;
  color: var(--green);
}

.section-dark .check-list li {
  color: #d9e0f1;
}

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

.feature-card,
.solution-card,
.os-card,
.resource-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.feature-card:hover,
.solution-card:hover,
.os-card:hover,
.resource-card:hover {
  transform: translateY(-4px);
  border-color: #bed0ff;
  box-shadow: var(--shadow);
}

.feature-card {
  padding: 27px;
}

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: 19px;
  color: var(--blue);
  background: var(--blue-100);
  border-radius: 8px;
}

.card-icon.teal {
  color: #087c88;
  background: #e5f7f8;
}

.card-icon.green {
  color: #087d51;
  background: #e7f7f0;
}

.card-icon.amber {
  color: #a56400;
  background: #fff3dc;
}

.card-icon .icon {
  width: 24px;
  height: 24px;
}

.feature-card h3,
.solution-card h3,
.os-card h3,
.resource-card h3 {
  margin-bottom: 10px;
  font-size: 20px;
}

.feature-card p,
.solution-card p,
.os-card p,
.resource-card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
}

.solution-card {
  overflow: hidden;
}

.solution-card img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  background: #f1f4fa;
  border-bottom: 1px solid var(--line);
}

.solution-card-body {
  padding: 23px;
}

.solution-card a,
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 16px;
  color: var(--blue);
  font-size: 14px;
  font-weight: 700;
}

.article-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
  gap: 60px;
  align-items: start;
}

.article-aside {
  position: sticky;
  top: 120px;
  padding: 24px;
  background: #f4f7ff;
  border-left: 3px solid var(--blue);
  border-radius: 0 8px 8px 0;
}

.article-aside strong {
  display: block;
  margin-bottom: 8px;
  font-size: 18px;
}

.article-aside p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
}

.steps {
  display: grid;
  gap: 0;
  counter-reset: step;
}

.step {
  position: relative;
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 18px;
  padding-bottom: 30px;
  counter-increment: step;
}

.step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 44px;
  bottom: 5px;
  left: 21px;
  width: 1px;
  background: #cbd7f5;
}

.step::before {
  content: counter(step, decimal-leading-zero);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: #fff;
  background: var(--blue);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 800;
}

.step h3 {
  margin: 3px 0 7px;
  font-size: 19px;
}

.step p {
  margin: 0;
  color: var(--muted);
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
}

table {
  width: 100%;
  min-width: 700px;
  border-collapse: collapse;
  background: #fff;
}

th,
td {
  padding: 17px 19px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: #2e3b59;
  background: #f4f7fb;
  font-size: 14px;
}

td {
  color: #515c72;
  font-size: 14px;
}

tr:last-child td {
  border-bottom: 0;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 2px 8px;
  color: #0e754e;
  background: #e9f8f1;
  border-radius: 5px;
  font-size: 12px;
  font-weight: 700;
}

.callout {
  padding: 28px;
  background: #eef3ff;
  border: 1px solid #cad8ff;
  border-radius: 8px;
}

.callout.warning {
  background: #fff7e8;
  border-color: #f2d69e;
}

.callout h3 {
  margin-bottom: 8px;
}

.callout p:last-child {
  margin-bottom: 0;
}

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

.os-card {
  padding: 28px;
}

.os-card .card-icon {
  margin-bottom: 16px;
}

.os-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
}

.os-meta span {
  padding: 4px 8px;
  color: #4d5870;
  background: #f1f4f9;
  border-radius: 5px;
  font-size: 12px;
}

.faq-list {
  max-width: 900px;
  margin: 0 auto;
  border-top: 1px solid var(--line);
}

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

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 0;
  color: var(--ink);
  background: transparent;
  border: 0;
  text-align: left;
  font-weight: 700;
  cursor: pointer;
}

.faq-question .icon {
  transition: transform 0.2s ease;
}

.faq-question[aria-expanded="true"] .icon {
  transform: rotate(45deg);
}

.faq-answer {
  display: none;
  padding: 0 44px 22px 0;
  color: var(--muted);
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

.faq-item.open .faq-answer {
  display: block;
}

.cta-band {
  padding: 62px 0;
  color: #fff;
  background: #2457ff;
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
}

.cta-inner h2 {
  margin-bottom: 9px;
  font-size: clamp(28px, 3.5vw, 40px);
}

.cta-inner p {
  max-width: 700px;
  margin-bottom: 0;
  color: #dbe4ff;
}

.site-footer {
  padding: 58px 0 26px;
  color: #d5dcee;
  background: #0d1730;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 0.72fr));
  gap: 42px;
}

.footer-about {
  max-width: 420px;
}

.footer-about p {
  margin: 17px 0 0;
  color: #9da9c4;
  font-size: 13px;
}

.site-footer .brand-copy strong {
  color: #fff;
}

.site-footer .brand-copy small {
  color: #9da9c4;
}

.footer-col h3 {
  margin-bottom: 14px;
  color: #fff;
  font-size: 14px;
}

.footer-col a {
  display: block;
  margin: 8px 0;
  color: #aeb8d0;
  font-size: 13px;
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  margin-top: 42px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: #8793af;
  font-size: 12px;
}

.legal-note {
  max-width: 800px;
}

.reveal {
  opacity: 1;
  transform: none;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

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

  .reveal {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 980px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: fixed;
    top: 106px;
    right: 0;
    left: 0;
    display: none;
    align-items: stretch;
    padding: 18px 20px 24px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 16px 28px rgba(25, 39, 72, 0.14);
  }

  .site-nav.open {
    display: grid;
    gap: 5px;
  }

  .site-nav > a {
    padding: 11px 4px;
  }

  .site-nav > a:not(.header-cta)::after {
    display: none;
  }

  .header-cta {
    margin-top: 6px;
  }

  .hero-inner {
    min-height: 560px;
  }

  .hero,
  .page-hero {
    background-position: 64% center;
  }

  .hero::before,
  .page-hero::before {
    background: linear-gradient(90deg, rgba(255, 255, 255, 1) 0%, rgba(255, 255, 255, 0.96) 51%, rgba(255, 255, 255, 0.72) 73%, rgba(255, 255, 255, 0.38) 100%);
  }

  .split,
  .article-grid {
    grid-template-columns: 1fr;
    gap: 38px;
  }

  .split.reverse .media-frame,
  .split.reverse .split-copy {
    order: initial;
  }

  .article-aside {
    position: static;
  }

  .card-grid,
  .os-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .path-item:nth-child(2) {
    border-right: 0;
  }

  .path-item:nth-child(-n + 2) {
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }

  .footer-grid {
    grid-template-columns: 1.4fr repeat(2, 1fr);
  }

  .footer-col:last-child {
    grid-column: 2;
  }
}

@media (max-width: 680px) {
  .container {
    width: min(calc(100% - 28px), var(--container));
  }

  .notice .container {
    min-height: 42px;
  }

  .header-inner {
    min-height: 64px;
  }

  .site-nav {
    top: 106px;
  }

  .brand-copy strong {
    font-size: 14px;
    white-space: normal;
  }

  .brand-copy small {
    display: none;
  }

  .hero,
  .page-hero {
    background-position: 68% center;
  }

  .hero::before,
  .page-hero::before {
    background: rgba(255, 255, 255, 0.89);
  }

  .hero-inner,
  .page-hero .hero-inner {
    min-height: 520px;
    padding: 54px 0 60px;
  }

  h1,
  .page-hero h1 {
    font-size: 34px;
  }

  .hero-lead {
    font-size: 16px;
  }

  .hero-actions,
  .cta-actions {
    display: grid;
  }

  .btn {
    width: 100%;
  }

  .section {
    padding: 68px 0;
  }

  .section-head {
    margin-bottom: 34px;
  }

  .section-head h2,
  .split-copy h2,
  .article-copy h2 {
    font-size: 29px;
  }

  .path-grid,
  .card-grid,
  .os-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .path-item {
    padding: 21px 16px;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }

  .path-item:last-child {
    border-bottom: 0;
  }

  .footer-col:last-child {
    grid-column: auto;
  }

  .cta-inner,
  .footer-bottom {
    align-items: stretch;
    flex-direction: column;
  }

  .cta-actions {
    min-width: 100%;
  }

  .faq-answer {
    padding-right: 0;
  }
}