:root {
  color-scheme: light;
  --canvas: #f4f6f8;
  --paper: #ffffff;
  --ink: #172331;
  --muted: #657180;
  --line: #dbe2e8;
  --blue: #0e78e7;
  --teal: #009f88;
  --coral: #d95543;
  --amber: #e89b16;
  --red-pale: #fff3f1;
  --amber-pale: #fff7e8;
  --shadow: 0 14px 34px rgba(31, 48, 67, 0.08);
  --shell: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: var(--canvas);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

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

button,
input,
textarea,
select {
  font: inherit;
}

.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;
}

.site-header {
  position: sticky;
  z-index: 10;
  top: 0;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.97);
}

.header-inner {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 1.05rem;
  font-weight: 760;
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: var(--paper);
  background: var(--coral);
  border-radius: 8px;
}

.brand-mark svg {
  width: 19px;
  height: 19px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 0.94rem;
  font-weight: 650;
}

.main-nav a {
  padding: 22px 0 19px;
  border-bottom: 3px solid transparent;
  transition: color 160ms ease, border-color 160ms ease;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--blue);
  border-color: var(--blue);
}

.front-section {
  padding-block: 28px 72px;
}

.front-warning-stack {
  display: grid;
  gap: 17px;
  margin-bottom: 24px;
}

.critical-warning,
.important-warning {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 15px;
  align-items: start;
  padding: 20px 24px;
  border-radius: 8px;
  box-shadow: 0 7px 17px rgba(31, 48, 67, 0.05);
}

.critical-warning {
  border: 1px solid #f0cbc5;
  border-left: 5px solid var(--coral);
  background: var(--red-pale);
}

.important-warning {
  border: 1px solid #f0dca7;
  border-left: 5px solid var(--amber);
  background: var(--amber-pale);
}

.front-warning__icon {
  display: grid;
  width: 29px;
  height: 29px;
  margin-top: 2px;
  place-items: center;
  border-radius: 50%;
}

.critical-warning .front-warning__icon {
  color: var(--coral);
}

.important-warning .front-warning__icon {
  color: var(--amber);
}

.front-warning__icon svg {
  width: 23px;
  height: 23px;
  stroke-width: 2.3;
}

.critical-warning h2 {
  margin-bottom: 7px;
  color: var(--coral);
  font-size: 1.22rem;
}

.critical-warning p,
.important-warning p {
  margin: 0;
  color: #5b4741;
  font-size: 0.95rem;
}

.important-warning p {
  color: #68583e;
}

.account-card-grid {
  display: grid;
  grid-template-columns: minmax(0, 470px);
  gap: 24px;
  justify-content: center;
}

.account-card {
  display: flex;
  min-height: 374px;
  flex-direction: column;
  padding: 28px;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.account-card__icon {
  display: grid;
  width: 44px;
  height: 44px;
  margin-bottom: 26px;
  place-items: center;
  color: var(--blue);
  border: 1px solid #b9d6f6;
  background: #edf6ff;
  border-radius: 8px;
}

.account-card__icon svg {
  width: 24px;
  height: 24px;
}

.account-card h2 {
  margin-bottom: 18px;
  color: var(--blue);
  font-size: 1.25rem;
  text-align: center;
}

.account-card__warning {
  display: flex;
  min-height: 39px;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 8px 10px;
  margin-bottom: 18px;
  color: var(--coral);
  background: var(--red-pale);
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 680;
  text-align: center;
}

.account-card__warning svg {
  width: 14px;
  height: 14px;
  flex: 0 0 auto;
  color: var(--amber);
}

.account-card__details {
  display: grid;
  gap: 8px;
  padding: 17px;
  margin: 0 0 22px;
  background: #f7f9fb;
}

.account-card__details div {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px;
}

.account-card__details dt,
.account-card__details dd {
  margin: 0;
  color: #4b5764;
  font-size: 0.88rem;
}

.account-card__details dd {
  overflow-wrap: anywhere;
}

.account-card .button {
  width: 100%;
  margin-top: auto;
}

.account-card--direct {
  min-height: 0;
  overflow: hidden;
}

.account-card__frame {
  display: block;
  width: calc(100% + 56px);
  height: 260px;
  margin-inline: -28px;
  margin-bottom: -28px;
  border: 0;
  border-top: 1px solid var(--line);
  background: var(--paper);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.16fr) minmax(320px, 0.84fr);
  align-items: stretch;
  gap: 24px;
  padding-block: 68px 58px;
}

.hero-copy,
.hero-note,
.embed-panel,
.step-card {
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 8px;
}

.hero-copy {
  padding: clamp(30px, 5vw, 60px);
  box-shadow: var(--shadow);
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 13px;
  color: var(--blue);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.eyebrow span {
  display: inline-block;
  width: 22px;
  height: 3px;
  background: var(--coral);
}

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

h1,
h2,
h3 {
  color: var(--ink);
  font-weight: 800;
  line-height: 1.28;
}

h1 {
  max-width: 11em;
  margin-bottom: 17px;
  font-size: clamp(2.2rem, 5vw, 4.2rem);
  letter-spacing: 0;
}

h2 {
  margin-bottom: 10px;
  font-size: clamp(1.55rem, 2.4vw, 2.2rem);
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 1.1rem;
  letter-spacing: 0;
}

.hero-lede {
  max-width: 39em;
  margin-bottom: 28px;
  color: var(--muted);
  font-size: 1.06rem;
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 13px 22px;
  margin-bottom: 32px;
  color: #43505e;
  font-size: 0.92rem;
  font-weight: 650;
}

.hero-points div {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.hero-points svg {
  width: 17px;
  height: 17px;
  color: var(--teal);
  stroke-width: 2.4;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 11px 19px;
  border: 1px solid transparent;
  border-radius: 7px;
  font-weight: 760;
  transition: background-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.button svg {
  width: 18px;
  height: 18px;
}

.button-primary {
  color: var(--paper);
  background: var(--blue);
  box-shadow: 0 8px 18px rgba(14, 120, 231, 0.22);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: #0565c5;
  box-shadow: 0 10px 22px rgba(14, 120, 231, 0.29);
  transform: translateY(-1px);
}

.hero-note {
  position: relative;
  overflow: hidden;
  padding: clamp(30px, 4vw, 45px);
  border-color: #f0c9c3;
  background: var(--red-pale);
}

.note-icon {
  display: grid;
  width: 47px;
  height: 47px;
  margin-bottom: 24px;
  place-items: center;
  color: var(--paper);
  background: var(--coral);
  border-radius: 8px;
}

.note-icon svg {
  width: 25px;
  height: 25px;
}

.note-kicker,
.embed-label {
  margin-bottom: 8px;
  color: var(--coral);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.hero-note h2 {
  font-size: clamp(1.32rem, 2.2vw, 1.72rem);
}

.hero-note p:not(.note-kicker) {
  margin-bottom: 0;
  color: #594842;
}

.note-rule {
  width: 100%;
  height: 1px;
  margin: 24px 0;
  background: #f0c9c3;
}

.hero-note .note-small {
  color: #816158;
  font-size: 0.9rem;
}

.safety-band {
  border-block: 1px solid #f0dca7;
  background: var(--amber-pale);
}

.safety-grid {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 17px;
  align-items: start;
  padding-block: 23px;
}

.safety-icon {
  display: grid;
  width: 38px;
  height: 38px;
  margin-top: 3px;
  place-items: center;
  color: var(--paper);
  background: var(--amber);
  border-radius: 50%;
}

.safety-icon svg {
  width: 21px;
  height: 21px;
}

.safety-grid h2 {
  margin-bottom: 3px;
  font-size: 1.12rem;
}

.safety-grid p {
  margin-bottom: 0;
  color: #69573a;
}

.access-section,
.faq-section {
  padding-block: 80px;
}

.section-heading {
  max-width: 670px;
  margin-bottom: 29px;
}

.section-heading > p:not(.eyebrow) {
  margin-bottom: 0;
  color: var(--muted);
}

.embed-panel {
  overflow: hidden;
  box-shadow: var(--shadow);
}

.access-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 420px);
  gap: clamp(34px, 7vw, 100px);
  align-items: center;
}

.access-checklist {
  max-width: 500px;
}

.minor-label {
  margin-bottom: 8px;
  color: var(--teal);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.access-checklist h3 {
  margin-bottom: 17px;
  font-size: 1.42rem;
}

.access-checklist ul {
  padding: 0;
  margin: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.access-checklist li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
  color: #43505e;
  font-size: 0.94rem;
  font-weight: 620;
}

.access-checklist li svg {
  width: 19px;
  height: 19px;
  margin-top: 3px;
  color: var(--teal);
  stroke-width: 2.4;
}

.embed-panel__head {
  display: flex;
  min-height: 92px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 19px 26px;
  border-bottom: 1px solid var(--line);
}

.embed-panel__head h3 {
  margin-bottom: 0;
  font-size: 1.22rem;
}

.embed-label {
  margin-bottom: 3px;
  color: var(--teal);
}

.access-pill {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 7px;
  padding: 6px 10px;
  color: #137667;
  border: 1px solid #afded6;
  background: #edf9f6;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
}

.access-pill svg {
  width: 15px;
  height: 15px;
}

.account-frame {
  display: block;
  width: 100%;
  height: 250px;
  border: 0;
  background: var(--paper);
}

.guide-section {
  padding-block: 80px;
  border-block: 1px solid var(--line);
  background: #eaf0f4;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.step-card {
  position: relative;
  min-height: 256px;
  padding: 28px;
}

.step-number {
  position: absolute;
  top: 24px;
  right: 24px;
  color: #a8b7c4;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.step-icon {
  display: grid;
  width: 45px;
  height: 45px;
  margin-bottom: 27px;
  place-items: center;
  color: var(--blue);
  border: 1px solid #b9d6f6;
  background: #edf6ff;
  border-radius: 8px;
}

.step-icon svg {
  width: 23px;
  height: 23px;
}

.step-card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.image-tutorial-section {
  padding-block: 80px;
}

.image-tutorial-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(360px, 1.15fr);
  gap: clamp(34px, 7vw, 100px);
  align-items: center;
}

.tutorial-copy {
  max-width: 440px;
}

.tutorial-copy h3 {
  margin-bottom: 18px;
  font-size: 1.42rem;
}

.tutorial-checklist {
  display: grid;
  gap: 14px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.tutorial-checklist li {
  display: grid;
  grid-template-columns: 31px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.tutorial-checklist span {
  display: grid;
  width: 31px;
  height: 31px;
  place-items: center;
  color: var(--paper);
  background: var(--blue);
  border-radius: 50%;
  font-size: 0.83rem;
  font-weight: 800;
}

.tutorial-checklist p {
  margin: 2px 0 0;
  color: #43505e;
  font-size: 0.95rem;
  font-weight: 620;
}

.tutorial-image-frame {
  width: min(100%, 680px);
  margin: 0;
  justify-self: end;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.tutorial-image-frame img {
  display: block;
  width: 100%;
  height: auto;
}

.tutorial-image-frame figcaption {
  padding: 11px 16px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
}

.video-tutorial-block {
  padding-top: 72px;
  margin-top: 72px;
  border-top: 1px solid var(--line);
}

.inline-tutorial-heading {
  max-width: 670px;
  margin-bottom: 27px;
}

.inline-tutorial-heading h3 {
  margin-bottom: 8px;
  font-size: clamp(1.4rem, 2.2vw, 1.9rem);
}

.inline-tutorial-heading > p:last-child {
  margin-bottom: 0;
  color: var(--muted);
}

.video-tutorial-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(270px, 0.34fr);
  gap: 22px;
  align-items: stretch;
}

.video-frame {
  overflow: hidden;
  border: 1px solid #1c2a37;
  background: #172331;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.video-frame video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #172331;
}

.youtube-embed {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000000;
}

.youtube-embed iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}

.youtube-facade {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  padding: 0;
  overflow: hidden;
  color: var(--paper);
  border: 0;
  background: #000000;
  cursor: pointer;
}

.youtube-facade img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.82;
  transition: opacity 160ms ease;
}

.youtube-facade:hover img,
.youtube-facade:focus-visible img {
  opacity: 1;
}

.youtube-facade__play {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  width: 72px;
  height: 72px;
  place-items: center;
  color: var(--paper);
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.68);
  transform: translate(-50%, -50%);
}

.youtube-facade__play svg {
  width: 35px;
  height: 35px;
  margin-left: 3px;
  fill: currentColor;
}

.video-source-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 11px 15px;
  color: #dbeeff;
  font-size: 0.86rem;
  font-weight: 700;
}

.video-source-link:hover,
.video-source-link:focus-visible {
  color: var(--paper);
  text-decoration: underline;
}

.video-source-link svg {
  width: 16px;
  height: 16px;
}

.video-note {
  padding: 29px;
  border: 1px solid #bee0da;
  background: #f3fbf9;
  border-radius: 8px;
}

.video-note__icon {
  display: grid;
  width: 43px;
  height: 43px;
  margin-bottom: 24px;
  place-items: center;
  color: var(--paper);
  background: var(--teal);
  border-radius: 8px;
}

.video-note__icon svg {
  width: 23px;
  height: 23px;
}

.video-note h3 {
  margin-bottom: 14px;
}

.video-note ol {
  display: grid;
  gap: 10px;
  padding-left: 1.25em;
  margin: 0;
  color: #3d5e59;
  font-size: 0.93rem;
}

.video-tutorial-block--secondary {
  padding-bottom: 80px;
}

.faq-section {
  padding-bottom: 90px;
}

.faq-list {
  border-top: 1px solid var(--line);
}

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

.faq-list summary {
  display: flex;
  min-height: 68px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 15px 2px;
  cursor: pointer;
  font-weight: 720;
  list-style: none;
}

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

.faq-list summary svg {
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  color: var(--blue);
  transition: transform 160ms ease;
}

.faq-list details[open] summary svg {
  transform: rotate(45deg);
}

.faq-list details p {
  max-width: 840px;
  margin: -2px 40px 22px 2px;
  color: var(--muted);
}

.site-footer {
  color: #d7e0e7;
  background: #253342;
}

.footer-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 24px;
  align-items: center;
  min-height: 96px;
  padding-block: 22px;
}

.brand--footer {
  color: var(--paper);
}

.footer-inner p {
  margin: 0;
  font-size: 0.82rem;
}

.footer-inner p:nth-of-type(1) {
  text-align: center;
}

.footer-inner p:nth-of-type(2) {
  color: #afbfcb;
  text-align: right;
  white-space: nowrap;
}

@media (max-width: 760px) {
  .shell {
    width: min(calc(100% - 32px), var(--shell));
  }

  .header-inner {
    min-height: 64px;
    gap: 14px;
  }

  .brand {
    font-size: 0.94rem;
  }

  .brand-mark {
    width: 30px;
    height: 30px;
  }

  .main-nav {
    gap: 15px;
    font-size: 0.82rem;
  }

  .main-nav a {
    padding-block: 20px 17px;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 16px;
    padding-block: 34px 37px;
  }

  .hero-copy,
  .hero-note {
    padding: 28px 23px;
  }

  h1 {
    max-width: none;
    font-size: 2.32rem;
  }

  .hero-lede {
    font-size: 1rem;
  }

  .hero-points {
    display: grid;
    gap: 10px;
    margin-bottom: 27px;
  }

  .button {
    width: 100%;
  }

  .safety-grid {
    gap: 13px;
    padding-block: 20px;
  }

  .safety-icon {
    width: 34px;
    height: 34px;
  }

  .safety-grid h2 {
    font-size: 1rem;
  }

  .safety-grid p {
    font-size: 0.9rem;
  }

  .access-section,
  .faq-section,
  .guide-section,
  .image-tutorial-section {
    padding-block: 54px;
  }

  .front-section {
    padding-block: 19px 54px;
  }

  .critical-warning,
  .important-warning {
    gap: 10px;
    padding: 17px 15px;
  }

  .critical-warning h2 {
    font-size: 1.08rem;
  }

  .critical-warning p,
  .important-warning p {
    font-size: 0.88rem;
  }

  .account-card-grid {
    grid-template-columns: 1fr;
    gap: 13px;
  }

  .account-card {
    min-height: 0;
    padding: 24px;
  }

  .account-card__frame {
    width: calc(100% + 48px);
    height: 260px;
    margin-inline: -24px;
    margin-bottom: -24px;
  }

  .account-card__icon {
    margin-bottom: 17px;
  }

  .access-layout {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .access-checklist {
    max-width: none;
  }

  .embed-panel__head {
    min-height: 84px;
    align-items: flex-start;
    flex-direction: column;
    gap: 7px;
    padding: 18px;
  }

  .account-frame {
    height: 270px;
  }

  .steps {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .image-tutorial-layout,
  .video-tutorial-layout {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .video-tutorial-block {
    padding-top: 54px;
    margin-top: 54px;
  }

  .video-tutorial-block--secondary {
    padding-bottom: 54px;
  }

  .youtube-facade__play {
    width: 58px;
    height: 58px;
  }

  .tutorial-copy {
    max-width: none;
  }

  .tutorial-image-frame {
    justify-self: stretch;
  }

  .video-note {
    padding: 24px;
  }

  .step-card {
    min-height: 0;
    padding: 24px;
  }

  .step-icon {
    margin-bottom: 18px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 8px;
    justify-items: start;
    min-height: 0;
    padding-block: 27px;
  }

  .footer-inner p:nth-of-type(1),
  .footer-inner p:nth-of-type(2) {
    text-align: left;
    white-space: normal;
  }
}

@media (max-width: 420px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 0;
    padding-top: 13px;
  }

  .main-nav {
    width: 100%;
    justify-content: space-between;
  }

  .main-nav a {
    padding-block: 13px 12px;
  }

  h1 {
    font-size: 2rem;
  }

  .access-pill {
    font-size: 0.77rem;
  }

  .account-frame {
    height: 280px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}