/* The media fallback also gives readers the system theme without JavaScript. */
:root {
  color-scheme: light;
  --ink: #242422;
  --muted: #72726d;
  --line: #e6e6e2;
  --paper: #fff;
  --soft: #fafaf8;
  --secondary-ink: #62625c;
  --body-ink: #44443e;
  --control-line: #d8d8d3;
  --card-line: #deded9;
  --focus-line: #888;
  --hover-line: #aaa;
  --shadow: #00000008;
  --hover-shadow: #00000005;
  --focus-shadow: #00000004;
  --button-bg: #252523;
  --button-ink: #fff;
  --button-hover: #454541;
  --error: #ad3028;
  --success: #216c45;
  --logo-filter: none;
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --ink: #f2f2ef;
  --muted: #a7a7a1;
  --line: #343434;
  --paper: #141414;
  --soft: #1c1c1c;
  --secondary-ink: #bababa;
  --body-ink: #d0d0cb;
  --control-line: #4b4b46;
  --card-line: #3d3d38;
  --focus-line: #a5a5a0;
  --hover-line: #6d6d66;
  --shadow: #00000024;
  --hover-shadow: #0000002b;
  --focus-shadow: #ffffff0d;
  --button-bg: #ececea;
  --button-ink: #181818;
  --button-hover: #fff;
  --error: #ffaaa1;
  --success: #8fd6ae;
  --logo-filter: invert(1);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]):not([data-theme="dark"]) {
    color-scheme: dark;
    --ink: #f2f2ef;
    --muted: #a7a7a1;
    --line: #343434;
    --paper: #141414;
    --soft: #1c1c1c;
    --secondary-ink: #bababa;
    --body-ink: #d0d0cb;
    --control-line: #4b4b46;
    --card-line: #3d3d38;
    --focus-line: #a5a5a0;
    --hover-line: #6d6d66;
    --shadow: #00000024;
    --hover-shadow: #0000002b;
    --focus-shadow: #ffffff0d;
    --button-bg: #ececea;
    --button-ink: #181818;
    --button-hover: #fff;
    --error: #ffaaa1;
    --success: #8fd6ae;
    --logo-filter: invert(1);
  }
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font:
    16px/1.65 Inter,
    Arial,
    "PingFang SC",
    "Microsoft YaHei",
    "Noto Sans CJK SC",
    sans-serif;
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
}
button,
input,
textarea,
select {
  font: inherit;
}
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 5px;
}
header {
  height: 104px;
  max-width: 1008px;
  padding: 0 24px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  font-size: 26px;
  font-weight: 650;
  letter-spacing: -0.8px;
}
.brand img {
  width: 35px;
  height: 35px;
  filter: var(--logo-filter);
}
header nav {
  display: flex;
  gap: 26px;
  color: var(--secondary-ink);
  font-size: 14px;
}
header nav a:hover {
  color: var(--ink);
}
main {
  max-width: 1008px;
  padding: 0 24px;
  margin: auto;
  min-height: 65vh;
}
.hero {
  text-align: center;
  padding: 51px 0 47px;
}
.hero h1 {
  font-size: 30px;
  font-weight: 600;
  line-height: 1.45;
  letter-spacing: -0.9px;
  margin: 0 0 28px;
  text-wrap: balance;
}
.search {
  display: flex;
  align-items: center;
  gap: 13px;
  max-width: 640px;
  margin: 0 auto;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 1px 2px var(--shadow);
  padding: 0 18px;
  height: 64px;
}
.search:focus-within {
  border-color: var(--hover-line);
  box-shadow: 0 0 0 3px var(--focus-shadow);
}
.search svg {
  width: 23px;
  height: 23px;
  flex-shrink: 0;
}
.search input {
  border: 0;
  outline: none;
  background: transparent;
  width: 100%;
  font-size: 16px;
  color: var(--ink);
  min-width: 0;
}
.search input:focus-visible,
textarea:focus-visible {
  outline: 0;
}
.clear {
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 22px;
  cursor: pointer;
  padding: 4px 7px;
  border-radius: 7px;
}
.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 33px 25px 25px;
  border: 1px solid var(--card-line);
  border-radius: 16px;
  box-shadow: 0 1px 2px var(--shadow);
  min-height: 250px;
  transition:
    background 0.16s,
    border-color 0.16s,
    box-shadow 0.16s;
}
.card:hover {
  background: var(--soft);
  border-color: var(--hover-line);
  box-shadow: 0 3px 12px var(--hover-shadow);
}
.category-icon {
  width: 42px;
  height: 42px;
  margin: 4px 0 23px;
}
.card h2 {
  font-size: 17px;
  font-weight: 600;
  margin: 0 0 6px;
}
.card p {
  color: var(--secondary-ink);
  font-size: 14px;
  line-height: 1.8;
  margin: 0 0 18px;
}
.breadcrumb {
  display: flex;
  gap: 9px;
  align-items: center;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 13px;
  margin: 18px 0 34px;
}
.breadcrumb a:hover {
  text-decoration: underline;
}
.section-head {
  margin: 0 0 30px;
}
.section-head h1 {
  font-size: 32px;
  line-height: 1.4;
  letter-spacing: -0.7px;
  margin: 0 0 12px;
}
.section-head p {
  color: var(--muted);
  max-width: 670px;
  margin: 0;
}
.article-list {
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
}
.article-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 25px;
  padding: 23px 27px;
  border-bottom: 1px solid var(--line);
}
.article-row:last-child {
  border-bottom: 0;
}
.article-row:hover {
  background: var(--soft);
}
.article-row h2 {
  font-size: 16px;
  line-height: 1.5;
  font-weight: 550;
  margin: 0 0 5px;
}
.article-row p {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
}
.arrow {
  font-size: 22px;
  color: var(--muted);
}
.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 680px) 210px;
  gap: 64px;
}
.article-layout article {
  min-width: 0;
}
.article-layout h1 {
  font-size: 32px;
  line-height: 1.4;
  letter-spacing: -0.5px;
  margin: 0 0 14px;
}
.intro {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
  margin: 0 0 38px;
}
.article-layout h2 {
  font-size: 21px;
  line-height: 1.5;
  margin: 34px 0 14px;
  scroll-margin-top: 24px;
}
.article-layout p,
.article-layout li {
  color: var(--body-ink);
  font-size: 16px;
  line-height: 1.95;
}
.article-layout ol {
  padding-inline-start: 25px;
}
.article-layout li {
  padding-inline-start: 5px;
  margin-bottom: 10px;
}
.article-layout article a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 4px;
  overflow-wrap: anywhere;
}
.article-layout aside {
  align-self: start;
  position: sticky;
  top: 30px;
  border-inline-start: 1px solid var(--line);
  padding-inline-start: 19px;
  font-size: 13px;
  color: var(--muted);
}
aside p {
  font-weight: 600;
  color: var(--ink);
}
aside a {
  display: block;
  margin: 12px 0;
  line-height: 1.7;
}
aside a:hover {
  color: var(--ink);
}
.related {
  margin-top: 46px;
  border-top: 1px solid var(--line);
  padding-top: 20px;
}
.related h2 {
  font-size: 17px;
}
.related a {
  display: block;
  padding: 9px 0;
}
.empty {
  padding: 52px 20px;
  text-align: center;
  border: 1px solid var(--line);
  border-radius: 16px;
}
.empty h2 {
  font-size: 20px;
  font-weight: 550;
}
.empty p {
  color: var(--muted);
  font-size: 14px;
}
.quiet-button {
  display: inline-block;
  padding: 9px 18px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
  margin-top: 10px;
}
footer {
  text-align: center;
  padding: 84px 24px 36px;
  color: var(--muted);
  font-size: 13px;
}
footer .wordmark {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.6px;
  opacity: 0.7;
  margin-bottom: 14px;
}
footer nav {
  display: flex;
  gap: 20px;
  justify-content: center;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}
[hidden] {
  display: none !important;
}
@media (max-width: 700px) {
  header {
    height: 84px;
    padding: 0 20px;
  }
  .brand {
    font-size: 23px;
  }
  .brand img {
    width: 30px;
    height: 30px;
  }
  header nav {
    gap: 14px;
    font-size: 12px;
  }
  main {
    padding: 0 20px;
  }
  .hero {
    padding: 32px 0 32px;
  }
  .hero h1 {
    font-size: 25px;
    line-height: 1.55;
    margin: 0 0 23px;
    letter-spacing: -0.6px;
  }
  .search {
    height: 58px;
    padding: 0 15px;
  }
  .grid {
    grid-template-columns: 1fr;
    gap: 17px;
  }
  .card {
    min-height: 219px;
    padding: 28px 25px 23px;
  }
  .category-icon {
    margin-bottom: 18px;
  }
  .card p {
    max-width: 270px;
  }
  .section-head h1,
  .article-layout h1 {
    font-size: 27px;
  }
  .article-layout {
    display: block;
  }
  .article-layout aside {
    display: none;
  }
  .article-layout h2 {
    font-size: 20px;
  }
  .breadcrumb {
    margin-bottom: 27px;
  }
  .article-row {
    padding: 20px;
  }
  .article-row p {
    font-size: 13px;
  }
  .article-layout p,
  .article-layout li {
    font-size: 16px;
  }
  footer {
    padding-top: 62px;
  }
}
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

.table-scroll {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 12px;
  margin: 24px 0;
}
.table-scroll table {
  border-collapse: collapse;
  width: 100%;
  min-width: 570px;
  font-size: 14px;
  line-height: 1.65;
}
.table-scroll th,
.table-scroll td {
  text-align: start;
  vertical-align: top;
  padding: 13px 14px;
  border-bottom: 1px solid var(--line);
}
.table-scroll th {
  background: var(--soft);
  font-weight: 600;
}
.table-scroll tr:last-child td {
  border-bottom: 0;
}
.article-meta {
  font-size: 13px;
  color: var(--muted);
  margin: -22px 0 28px;
}
.card[data-category="plans-and-billing"] {
  grid-column: 1/-1;
  display: grid;
  grid-template-columns: 54px 1fr;
  grid-template-rows: auto auto;
  min-height: 140px;
  text-align: start;
  column-gap: 23px;
  padding: 28px 32px;
}
.card[data-category="plans-and-billing"] .category-icon {
  grid-row: 1/3;
  margin: 0;
}
.card[data-category="plans-and-billing"] h2 {
  grid-column: 2;
  margin: 0;
}
.card[data-category="plans-and-billing"] p {
  grid-column: 2;
  margin: 5px 0 0;
}
.quiet-button:hover {
  background: var(--soft);
}
@media (max-width: 700px) {
  .card[data-category="plans-and-billing"] {
    display: flex;
    align-items: center;
    text-align: center;
    min-height: 219px;
    padding: 28px 25px 23px;
  }
  .card[data-category="plans-and-billing"] .category-icon {
    margin-bottom: 18px;
  }
  .card[data-category="plans-and-billing"] p {
    margin: 6px 0 18px;
  }
}

.article-layout .table-hint {
  display: none;
}
@media (max-width: 700px) {
  .article-layout .table-hint {
    display: block;
    font-size: 12px;
    color: var(--muted);
    margin: 20px 0 -12px;
  }
}
/* Public static pages keep navigation usable before JavaScript loads. */
html {
  scroll-behavior: smooth;
}
body {
  overflow-wrap: anywhere;
}
.skip-link {
  position: absolute;
  z-index: 2;
  top: 12px;
  inset-inline-start: 20px;
  padding: 10px 16px;
  background: var(--paper);
  border: 1px solid var(--ink);
  border-radius: 8px;
  transform: translateY(-180%);
}
.skip-link:focus {
  transform: translateY(0);
}
.hero-compact {
  padding: 19px 0 35px;
}
.search-noscript {
  font-size: 13px;
  color: var(--muted);
}
.search-message {
  min-height: 170px;
  text-align: center;
  color: var(--muted);
  padding: 35px 0;
}
.search-submit:focus-visible {
  position: static;
  width: auto;
  height: auto;
  margin: 0;
  overflow: visible;
  clip: auto;
  padding: 4px 10px;
  white-space: nowrap;
  border: 0;
  border-radius: 6px;
  background: var(--soft);
}
.quiet-button + .quiet-button {
  margin-inline-start: 12px;
}
.table-scroll:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 4px;
}
.breadcrumb [aria-current="page"] {
  overflow-wrap: anywhere;
}
.article-layout li:last-child {
  margin-bottom: 0;
}
.article-layout p {
  margin-top: 0;
}
.article-meta time {
  white-space: nowrap;
}
@media (max-width: 700px) {
  .hero-compact {
    padding: 12px 0 25px;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

.feedback {
  margin-top: 72px;
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--soft);
}
.feedback-heading h2 {
  font-size: 23px;
  line-height: 1.4;
  letter-spacing: -0.4px;
  margin: 0 0 9px;
  font-weight: 600;
}
.feedback-heading p {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 14px;
}
.feedback label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
}
.feedback-fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}
.feedback input,
.feedback textarea {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--control-line);
  border-radius: 9px;
  background: var(--paper);
  padding: 11px 13px;
  color: var(--ink);
  font-size: 16px;
  font-weight: 400;
}
.feedback textarea {
  resize: vertical;
  min-height: 140px;
  line-height: 1.65;
}
.feedback input:focus,
.feedback textarea:focus {
  border-color: var(--focus-line);
}
.feedback-hint {
  font-size: 12px;
  color: var(--muted);
  margin: 9px 0 20px;
}
.feedback-trap {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
  white-space: nowrap;
}
.feedback-actions {
  display: flex;
  align-items: center;
  gap: 22px;
}
.feedback-submit {
  flex-shrink: 0;
  background: var(--button-bg);
  color: var(--button-ink);
  border: 1px solid var(--button-bg);
  border-radius: 9px;
  padding: 11px 19px;
  cursor: pointer;
  font-size: 14px;
}
.feedback-submit:hover {
  background: var(--button-hover);
}
.feedback-submit:disabled {
  cursor: wait;
  opacity: 0.6;
}
#feedback-status {
  font-size: 13px;
  margin: 0;
  color: var(--muted);
}
#feedback-status[data-state="error"] {
  color: var(--error);
}
#feedback-status[data-state="success"] {
  color: var(--success);
}
@media (max-width: 700px) {
  .feedback {
    margin-top: 44px;
    padding: 23px 20px;
  }
  .feedback-heading h2 {
    font-size: 21px;
  }
  .feedback-fields {
    grid-template-columns: 1fr;
    gap: 18px;
    margin-bottom: 18px;
  }
  .feedback-actions {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
  }
  .feedback-submit {
    width: 100%;
  }
  header nav a {
    white-space: nowrap;
  }
  .card p {
    margin-bottom: 0;
  }
}

.feedback-hint a {
  text-decoration: underline;
  text-underline-offset: 3px;
}
.feedback-hint a:hover {
  color: var(--ink);
}

/* Keep appearance controls out of the header's single return link. */
.appearance {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 24px;
  color: var(--muted);
}
.appearance select {
  min-width: 112px;
  min-height: 40px;
  padding: 7px 10px;
  border: 1px solid var(--control-line);
  border-radius: 8px;
  background: var(--paper);
  color: var(--ink);
  font-size: 13px;
  cursor: pointer;
}
.appearance select:hover {
  border-color: var(--hover-line);
}
.search input::placeholder,
.feedback input::placeholder,
.feedback textarea::placeholder {
  color: var(--muted);
  opacity: 1;
}

/* Static locale pages retain native reading direction and usable small screens. */
.preferences {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px 28px;
  margin-top: 24px;
}
.preferences .appearance {
  margin-top: 0;
  min-width: 0;
}
.language select {
  width: 220px;
  max-width: calc(100vw - 110px);
}
[dir="rtl"] .arrow,
[dir="rtl"] .breadcrumb > span[aria-hidden="true"] {
  transform: scaleX(-1);
}
[dir="rtl"] .hero h1,
[dir="rtl"] .section-head h1,
[dir="rtl"] .article-layout h1,
[dir="rtl"] .feedback-heading h2 {
  letter-spacing: normal;
}
.feedback input[type="email"] {
  direction: ltr;
  text-align: start;
}
@media (max-width: 450px) {
  .preferences {
    flex-direction: column;
    align-items: stretch;
    max-width: 310px;
    margin-inline: auto;
  }
  .preferences .appearance {
    justify-content: space-between;
  }
  .language select {
    max-width: 72%;
  }
  header {
    height: auto;
    min-height: 84px;
  }
  .brand {
    flex-shrink: 0;
  }
  header nav a {
    white-space: normal;
    text-align: end;
  }
}

/* Product names such as Pro+ must retain order and stay on one line in RTL. */
bdi[dir="ltr"] {
  unicode-bidi: isolate;
  white-space: nowrap;
}