:root {
  --ink: #0b1019;
  --ink-2: #111927;
  --paper: #f4f7fb;
  --white: #fff;
  --muted: #667182;
  --line: #dbe2ec;
  --blue: #2f6df6;
  --cyan: #37c9e8;
  --amber: #ffb34d;
  --green: #35b97f;
  --shell: 1180px;
  --sans: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
}
*,
*::before,
*::after {
  box-sizing: border-box;
  letter-spacing: 0;
}
html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: #70819b #e7edf5;
}
body {
  min-width: 280px;
  margin: 0;
  overflow-x: clip;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img {
  display: block;
  max-width: 100%;
  height: auto;
}
a {
  color: inherit;
  text-underline-offset: 0.2em;
}
button,
a,
summary {
  -webkit-tap-highlight-color: transparent;
}
:focus-visible {
  outline: 3px solid #73dff2;
  outline-offset: 3px;
}
.shell {
  width: min(calc(100% - 48px), var(--shell));
  margin-inline: auto;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.skip-link {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 10px;
  padding: 10px 14px;
  color: #07101e;
  background: #fff;
  transform: translateY(-150%);
}
.skip-link:focus {
  transform: none;
}
::-webkit-scrollbar {
  width: 11px;
}
::-webkit-scrollbar-track {
  background: #e7edf5;
}
::-webkit-scrollbar-thumb {
  border: 3px solid #e7edf5;
  border-radius: 10px;
  background: #70819b;
}
::-webkit-scrollbar-thumb:hover {
  background: #475972;
}
.site-header {
  position: sticky;
  z-index: 30;
  top: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(7, 10, 15, 0.9);
  backdrop-filter: blur(18px);
  color: #fff;
}
.nav {
  min-height: 72px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  font-weight: 800;
}
.brand img {
  width: 38px;
  height: 38px;
  border-radius: 8px;
}
.brand-copy {
  line-height: 1.15;
}
.brand-copy small {
  display: block;
  margin-top: 4px;
  color: #9ba9bb;
  font-size: 11px;
  font-weight: 500;
}
.publisher {
  color: #9ba9bb;
  font-size: 12px;
}
.publisher a {
  color: #d9e2ef;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-left: auto;
}
.nav-links a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  color: #c5cfdd;
  font-size: 14px;
  text-decoration: none;
}
.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: #fff;
}
.official-link {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 17px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 6px;
  background: #fff;
  color: #111927;
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
}
.menu-button {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 6px;
  color: #fff;
  background: transparent;
  font-size: 22px;
  cursor: pointer;
}
.page-hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  color: #fff;
  background: #070a0f var(--hero-image) no-repeat calc(50% + 260px)
    center/1160px auto;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    #070a0f 0%,
    rgba(7, 10, 15, 0.96) 38%,
    rgba(7, 10, 15, 0.44) 72%,
    rgba(7, 10, 15, 0.1)
  );
}
.page-hero-inner {
  position: relative;
  z-index: 1;
  padding: 96px 0 72px;
}
.crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 28px;
  color: #97a5b8;
  font-size: 12px;
}
.crumbs a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.crumbs span {
  display: inline-flex;
  align-items: center;
}
.page-hero h1 {
  max-width: 770px;
  margin: 0;
  font-size: 58px;
  line-height: 1.12;
}
.page-hero p {
  max-width: 680px;
  margin: 22px 0 0;
  color: #c0cada;
  font-size: 18px;
}
.page-tag {
  color: #73dff2;
  font-size: 13px;
  font-weight: 800;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 21px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
}
.button-primary {
  color: #111927;
  background: #fff;
}
.button-quiet {
  border-color: rgba(255, 255, 255, 0.28);
  color: #fff;
  background: rgba(7, 10, 15, 0.55);
}
.quick-nav {
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.quick-nav-inner {
  display: flex;
  gap: 30px;
  overflow-x: auto;
}
.quick-nav a {
  min-height: 62px;
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  color: #4d5a6d;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
}
.quick-nav a:hover {
  color: var(--blue);
}
.section {
  padding: 94px 0;
}
.section-white {
  background: #fff;
}
.section-dark {
  color: #fff;
  background: var(--ink);
}
.section-soft {
  background: #eaf0f7;
}
.section-head {
  display: grid;
  grid-template-columns: 150px minmax(0, 760px);
  gap: 32px;
}
.kicker {
  margin: 8px 0 0;
  color: #557ba9;
  font-size: 12px;
  font-weight: 800;
}
.section-dark .kicker {
  color: #73dff2;
}
.section h2 {
  margin: 0;
  font-size: 42px;
  line-height: 1.25;
}
.section-intro {
  max-width: 730px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 16px;
}
.section-dark .section-intro {
  color: #a8b5c5;
}
.feature-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.96fr);
  gap: 64px;
  align-items: center;
  margin-top: 62px;
}
.feature-row.reverse .feature-media {
  order: 2;
}
.feature-media {
  overflow: hidden;
  border-radius: 8px;
  background: #090d14;
}
.feature-media img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
}
.feature-copy .num {
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
}
.section-dark .feature-copy .num {
  color: #73dff2;
}
.feature-copy h3 {
  margin: 10px 0 15px;
  font-size: 30px;
  line-height: 1.28;
}
.feature-copy p {
  margin: 0;
  color: var(--muted);
}
.section-dark .feature-copy p {
  color: #a8b5c5;
}
.fact-list {
  display: grid;
  gap: 0;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.section-dark .fact-list {
  border-color: #2c3749;
}
.fact-list li {
  display: grid;
  grid-template-columns: 10px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  color: #465466;
  font-size: 14px;
}
.section-dark .fact-list li {
  border-color: #2c3749;
  color: #bdc8d6;
}
.fact-list li::before {
  content: "";
  width: 6px;
  height: 6px;
  margin-top: 9px;
  background: var(--cyan);
}
.guide-flow {
  display: grid;
  grid-template-columns: 290px minmax(0, 1fr);
  gap: 72px;
  margin-top: 64px;
}
.guide-aside {
  position: sticky;
  top: 104px;
  align-self: start;
}
.guide-aside ol {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.guide-aside a {
  min-height: 54px;
  display: flex;
  align-items: center;
  gap: 13px;
  border-bottom: 1px solid var(--line);
  color: #536073;
  font-size: 13px;
  text-decoration: none;
}
.guide-aside b {
  color: var(--blue);
  font-size: 11px;
}
.guide-content {
  display: grid;
  gap: 66px;
}
.guide-step {
  scroll-margin-top: 94px;
}
.guide-step figure {
  margin: 0 0 28px;
  overflow: hidden;
  border-radius: 8px;
  background: #dce6f1;
}
.guide-step img {
  width: 100%;
  aspect-ratio: 3/2;
  object-fit: cover;
}
.guide-step .step-no {
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
}
.guide-step h2 {
  margin: 8px 0 13px;
  font-size: 32px;
}
.guide-step p {
  margin: 0;
  color: var(--muted);
}
.tip {
  margin-top: 20px;
  padding: 17px 18px;
  border-left: 3px solid var(--amber);
  background: #fff7e8;
  color: #5f5139;
  font-size: 14px;
}
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 56px;
}
.scenario {
  min-height: 250px;
  padding: 25px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}
.scenario .label {
  color: var(--blue);
  font-size: 11px;
  font-weight: 800;
}
.scenario h3 {
  margin: 55px 0 10px;
  font-size: 23px;
}
.scenario p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}
.support-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 390px;
  gap: 52px;
  margin-top: 60px;
}
.support-list {
  display: grid;
  border-top: 1px solid var(--line);
}
.support-item {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  min-height: 116px;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}
.support-item .num {
  color: #7e8a9b;
  font-size: 12px;
}
.support-item h3 {
  margin: 0 0 5px;
  font-size: 20px;
}
.support-item p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}
.support-item .arrow {
  color: var(--blue);
  font-weight: 800;
}
.support-side {
  align-self: start;
  overflow: hidden;
  border-radius: 8px;
  background: #0a101a;
  color: #fff;
}
.support-side img {
  width: 100%;
  aspect-ratio: 3/2;
  object-fit: cover;
}
.support-side-copy {
  padding: 24px;
}
.support-side h2 {
  margin: 0;
  font-size: 25px;
}
.support-side p {
  margin: 12px 0 0;
  color: #aebaca;
  font-size: 14px;
}
.support-side .button {
  width: 100%;
  margin-top: 20px;
}
.faq {
  max-width: 900px;
  margin-top: 52px;
  border-top: 1px solid var(--line);
}
details {
  border-bottom: 1px solid var(--line);
}
summary {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  cursor: pointer;
  list-style: none;
  font-weight: 800;
}
summary::-webkit-details-marker {
  display: none;
}
summary::after {
  content: "+";
  font-size: 22px;
  font-weight: 400;
}
details[open] summary::after {
  content: "−";
}
details p {
  max-width: 760px;
  margin: -5px 0 24px;
  color: var(--muted);
}
.source-band {
  padding: 24px 0;
  border-block: 1px solid #beeef5;
  background: #e4fbff;
  color: #314b55;
}
.source-band p {
  margin: 0;
  font-size: 13px;
}
.source-band a {
  font-weight: 800;
}
.floating-tools {
  position: fixed;
  z-index: 40;
  right: 22px;
  bottom: 22px;
  display: grid;
  gap: 10px;
}
.floating-tool {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 0;
  border-radius: 6px;
  color: #172334;
  background: #fff;
  box-shadow: 0 12px 34px rgba(11, 16, 25, 0.25);
  cursor: pointer;
}
.floating-tool svg {
  width: 23px;
  height: 23px;
}
.wechat-tool {
  position: relative;
}
.wechat-qr {
  position: absolute;
  right: 58px;
  bottom: 0;
  width: 184px;
  padding: 8px;
  border-radius: 6px;
  background: #fff;
  box-shadow: 0 18px 54px rgba(11, 16, 25, 0.28);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: 0.2s;
  pointer-events: none;
}
.wechat-tool.open .wechat-qr {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.back-to-top {
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: 0.2s;
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.site-footer {
  padding: 34px 0;
  color: #9aa7b8;
  background: #070a0f;
}
.footer-row {
  display: flex;
  justify-content: space-between;
  gap: 28px;
  align-items: flex-end;
}
.site-footer p {
  max-width: 900px;
  margin: 0;
  font-size: 12px;
}
.site-footer a {
  color: #d7e0ec;
}
.footer-top {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
}
@media (max-width: 980px) {
  .publisher,
  .official-link {
    display: none;
  }
  .menu-button {
    display: grid;
    margin-left: auto;
  }
  .nav-links {
    position: absolute;
    top: 72px;
    right: 20px;
    left: 20px;
    display: none;
    align-items: stretch;
    gap: 0;
    padding: 12px;
    border: 1px solid #283448;
    border-radius: 8px;
    background: #0b111b;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
  }
  .nav-links.is-open {
    display: grid;
  }
  .nav-links a {
    padding: 0 12px;
  }
  .page-hero {
    background-position: calc(50% + 180px) center;
  }
  .page-hero h1 {
    font-size: 48px;
  }
  .section-head {
    grid-template-columns: 1fr;
    gap: 7px;
  }
  .feature-row {
    grid-template-columns: 1fr;
  }
  .feature-row.reverse .feature-media {
    order: 0;
  }
  .scenario-grid {
    grid-template-columns: 1fr 1fr;
  }
  .scenario:last-child {
    grid-column: 1/-1;
  }
  .guide-flow {
    grid-template-columns: 1fr;
  }
  .guide-aside {
    position: static;
  }
  .guide-aside ol {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .support-layout {
    grid-template-columns: 1fr;
  }
  .support-side {
    max-width: 520px;
  }
}
@media (max-width: 640px) {
  .shell {
    width: min(calc(100% - 28px), var(--shell));
  }
  .site-header .shell {
    width: min(calc(100% - 24px), var(--shell));
  }
  .page-hero {
    min-height: 520px;
    background-position: 54% bottom;
    background-size: 830px auto;
  }
  .page-hero::before {
    background: linear-gradient(
      180deg,
      rgba(7, 10, 15, 0.96),
      rgba(7, 10, 15, 0.7)
    );
  }
  .page-hero-inner {
    padding: 78px 0 58px;
  }
  .page-hero h1 {
    font-size: 38px;
  }
  .page-hero p {
    font-size: 16px;
  }
  .hero-actions {
    display: grid;
  }
  .button {
    width: 100%;
  }
  .section {
    padding: 72px 0;
  }
  .section h2 {
    font-size: 32px;
  }
  .feature-row {
    gap: 34px;
    margin-top: 42px;
  }
  .feature-copy h3 {
    font-size: 27px;
  }
  .scenario-grid {
    grid-template-columns: 1fr;
  }
  .scenario:last-child {
    grid-column: auto;
  }
  .guide-flow {
    gap: 42px;
    margin-top: 44px;
  }
  .guide-aside ol {
    grid-template-columns: 1fr;
  }
  .guide-content {
    gap: 54px;
  }
  .guide-step h2 {
    font-size: 28px;
  }
  .support-layout {
    gap: 34px;
    margin-top: 42px;
  }
  .support-item {
    grid-template-columns: 36px minmax(0, 1fr) auto;
    gap: 10px;
    min-height: 126px;
  }
  .support-item p {
    font-size: 12px;
  }
  .footer-row {
    display: block;
  }
  .footer-top {
    margin-top: 16px;
  }
  .floating-tools {
    right: 14px;
    bottom: 14px;
  }
  .wechat-qr {
    width: 166px;
  }
}
@media (max-width: 360px) {
  .brand-copy small {
    display: none;
  }
  .page-hero h1 {
    font-size: 33px;
  }
  .section h2 {
    font-size: 29px;
  }
  .support-item {
    grid-template-columns: 1fr auto;
  }
  .support-item .num {
    display: none;
  }
}
@media (prefers-reduced-motion: no-preference) {
  html.js [data-hero] > * {
    opacity: 0;
    transform: translateY(22px);
  }
  html.js [data-reveal] {
    opacity: 0;
    transform: translateY(26px);
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}