@charset "UTF-8";
:root {
  --paper: #f7f8f4;
  --ink: #202a26;
  --muted: #68716b;
  --green: #235b45;
  --green-dark: #174432;
  --sage: #e3e9dc;
  --line: #dce1d9;
  --white: #fff;
  --radius: 12px;
  --container: 1160px;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
}
a {
  color: inherit;
  text-decoration: none;
}
button,
input,
select {
  font: inherit;
}
button,
a,
input,
select,
summary {
  -webkit-tap-highlight-color: transparent;
}
button {
  cursor: pointer;
  color: inherit;
}
button:disabled {
  cursor: default;
}
button,
input,
select {
  border-radius: 0;
}
button {
  border: 0;
  background: none;
}
input {
  min-width: 0;
}
a,
button {
  touch-action: manipulation;
}
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible {
  outline: 3px solid #53866c;
  outline-offset: 4px;
}
a:hover {
  color: var(--green);
}
h1,
h2,
h3,
p {
  margin: 0;
}
h1,
h2,
h3 {
  text-wrap: pretty;
}
img {
  max-width: 100%;
  display: block;
}
svg {
  flex-shrink: 0;
  vertical-align: middle;
}
.icon {
  width: 24px;
  height: 24px;
  display: inline-block;
}
h1 {
  font-size: 44px;
  line-height: 1.35;
  letter-spacing: -1.8px;
  font-weight: 730;
}
h2 {
  font-size: 26px;
  line-height: 1.45;
  letter-spacing: -0.6px;
  font-weight: 690;
}
h3 {
  font-size: 18px;
  line-height: 1.5;
  font-weight: 650;
  letter-spacing: -0.25px;
}
p {
  line-height: 1.8;
}
::selection {
  background: #d0e3cf;
}
.container {
  width: min(var(--container), calc(100% - 80px));
  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;
  left: 20px;
  top: -80px;
  background: var(--green);
  color: white;
  padding: 12px 20px;
  z-index: 100;
}
.skip-link:focus {
  top: 12px;
}
.site-header {
  height: 80px;
  border-bottom: 1px solid var(--line);
}
.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 26px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-weight: 760;
  font-size: 26px;
  letter-spacing: -1.2px;
  white-space: nowrap;
}
.brand .icon {
  width: 28px;
  height: 31px;
  color: var(--green);
}
.desktop-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 32px;
  height: 100%;
  font-size: 14px;
}
.desktop-nav a {
  height: 100%;
  display: flex;
  align-items: center;
  position: relative;
}
.desktop-nav a[aria-current="page"] {
  color: var(--green);
  font-weight: 650;
}
.desktop-nav a[aria-current="page"]:after {
  position: absolute;
  content: "";
  height: 3px;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--green);
}
.header-tools {
  display: flex;
  gap: 6px;
  margin-left: 15px;
}
.icon-button {
  height: 44px;
  min-width: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  position: relative;
}
.icon-button:hover {
  background: #e8ede4;
}
.saved-count {
  position: absolute;
  top: 1px;
  right: 0;
  min-width: 16px;
  height: 16px;
  border-radius: 9px;
  padding: 0 4px;
  display: grid;
  place-items: center;
  background: var(--green);
  color: white;
  font-size: 10px;
}
.saved-count[hidden] {
  display: none;
}
.bottom-nav {
  display: none;
}
main {
  min-height: 60vh;
  padding-bottom: 70px;
}
.hero {
  padding: 44px 0 30px;
}
.hero-top {
  display: flex;
  justify-content: space-between;
  gap: 30px;
}
.hero h1 {
  font-size: 58px;
  line-height: 1.25;
  letter-spacing: -2.8px;
  font-weight: 750;
}
.hero h1 span,
.page-intro h1 span {
  color: var(--green);
}
.hero-note {
  font-size: 13px;
  color: var(--muted);
  padding-top: 18px;
}
.hero-description {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 17px;
  letter-spacing: 0.1px;
}
.feature {
  display: grid;
  grid-template-columns: 55% 45%;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--sage);
}
.feature-image {
  display: block;
  min-height: 320px;
  overflow: hidden;
}
.feature-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}
.feature-image:hover img {
  transform: scale(1.025);
}
.feature-content {
  padding: 34px 36px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.feature-label {
  font-size: 12px;
  color: #556657;
  margin-bottom: 17px;
}
.feature h2 {
  font-size: 32px;
  line-height: 1.5;
  letter-spacing: -1px;
}
.feature h2 span {
  color: var(--green);
}
.feature-content > p:not(.feature-label) {
  font-size: 14px;
  margin-top: 14px;
  color: #58655b;
  max-width: 340px;
}
.feature-actions {
  margin-top: 25px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 15px;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 46px;
  padding: 11px 20px;
  font-size: 14px;
  font-weight: 590;
  border-radius: 7px;
  line-height: 1.5;
  border: 1px solid transparent;
  transition:
    background 0.2s,
    color 0.2s;
}
.button .icon {
  height: 18px;
  width: 18px;
}
.primary {
  color: white;
  background: var(--green);
}
.primary:hover {
  color: white;
  background: var(--green-dark);
}
.secondary {
  border-color: #cbd4c9;
  background: transparent;
}
.secondary:hover {
  background: #e9eee5;
}
.light {
  background: var(--paper);
  color: var(--green);
}
.light:hover {
  background: white;
  color: var(--green-dark);
}
.watch-apps-entry {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 20px;
  margin: 4px 0 28px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #edf1e9;
}
.watch-apps-entry strong,
.watch-apps-entry small {
  display: block;
}
.watch-apps-entry strong {
  color: var(--green);
  font-size: 16px;
}
.watch-apps-entry small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}
.watch-apps-entry .icon {
  width: 20px;
  color: var(--green);
}
.watch-apps-entry:hover {
  background: var(--sage);
}
.our-apps-page {
  padding: 38px 0 70px;
}
.our-apps-hero {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 50px;
  padding: 26px 0 44px;
  border-bottom: 1px solid var(--line);
}
.our-apps-hero h1 {
  font-size: 52px;
  line-height: 1.28;
  letter-spacing: -2.5px;
}
.our-apps-hero h1 span {
  color: var(--green);
}
.our-apps-hero p {
  max-width: 570px;
  margin-top: 18px;
  color: var(--muted);
  font-size: 16px;
}
.our-apps-count {
  flex: 0 0 185px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 18px 0 4px 24px;
  border-left: 1px solid var(--line);
  color: var(--muted);
}
.our-apps-count strong {
  color: var(--green);
  font-size: 43px;
  line-height: 1;
  letter-spacing: -2px;
}
.our-apps-count span {
  font-size: 13px;
}
.source-banner {
  display: flex;
  align-items: center;
  gap: 7px;
  min-height: 54px;
  padding: 10px 18px;
  margin-top: 28px;
  border-radius: 8px;
  background: var(--sage);
  color: var(--green-dark);
  font-size: 14px;
}
.source-banner strong {
  font-weight: 700;
}
.source-banner-note {
  margin-left: auto;
  color: #5f7163;
  font-size: 12px;
}
.our-apps-list {
  margin-top: 57px;
}
.our-apps-list .section-head {
  margin-bottom: 14px;
}
.our-app-rows {
  border-top: 1px solid var(--line);
}
.our-app-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  min-height: 112px;
  padding: 20px 17px 20px 0;
  border-bottom: 1px solid var(--line);
  transition: background 0.2s;
}
.our-app-row:hover {
  background: #edf1e9;
}
.our-app-row.is-source {
  padding-left: 17px;
  padding-right: 17px;
  background: var(--green-dark);
  color: var(--paper);
  border-radius: 8px;
  border-bottom-color: transparent;
}
.our-app-row.is-source:hover {
  background: var(--green);
}
.our-app-main {
  display: flex;
  align-items: center;
  gap: 18px;
  min-width: 0;
}
.our-app-main .app-icon {
  width: 72px;
  height: 72px;
  flex-basis: 72px;
  border-radius: 17px;
}
.our-app-main h3 {
  margin-bottom: 4px;
  font-size: 20px;
}
.our-app-main p {
  color: var(--muted);
  font-size: 14px;
}
.our-app-row.is-source .our-app-main p {
  color: #c9d9ce;
}
.our-app-row .button {
  flex: 0 0 auto;
  min-width: 124px;
}
.our-apps-note {
  max-width: 700px;
  margin-top: 28px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.9;
}
.meta {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.7;
}
.scene-nav {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  padding: 26px 0 0;
}
.scene-nav a {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
  min-height: 50px;
  border-right: 1px solid var(--line);
  font-size: 14px;
  font-weight: 540;
}
.scene-nav a:last-child {
  border-right: 0;
}
.scene-nav a > .icon {
  width: 27px;
  height: 27px;
}
.scene-nav .scene-arrow {
  display: none;
}
.section {
  margin-top: 60px;
}
.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  margin-bottom: 23px;
}
.section-head p {
  font-size: 14px;
  color: var(--muted);
  margin-top: 6px;
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--green);
  font-size: 13px;
  min-height: 44px;
  white-space: nowrap;
}
.text-link .icon {
  width: 18px;
  height: 18px;
}
.text-link:hover {
  text-decoration: underline;
  text-underline-offset: 5px;
}
.app-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 50px;
}
.app-row {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
  min-width: 0;
}
.app-main {
  display: flex;
  gap: 18px;
  flex: 1;
  min-width: 0;
  align-items: flex-start;
}
.app-main:hover h3 {
  color: var(--green);
}
.app-icon {
  width: 64px;
  height: 64px;
  flex: 0 0 64px;
  border-radius: 15px;
  object-fit: cover;
  background: #e2e7df;
}
.app-copy {
  min-width: 0;
}
.app-copy h3 {
  font-size: 18px;
  line-height: 1.4;
  margin-bottom: 5px;
}
.app-copy p {
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
  margin-bottom: 7px;
  max-width: 410px;
}
.app-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  font-size: 12px;
  color: var(--green);
  line-height: 1.7;
}
.app-row .bookmark {
  margin-top: -5px;
  flex-shrink: 0;
}
.bookmark.is-saved {
  color: var(--green);
}
.bookmark.is-saved svg {
  fill: currentColor;
}
.app-row.compact {
  padding: 20px 0 23px;
}
.app-row.compact p {
  font-size: 13px;
  margin-bottom: 5px;
}
.app-grid > .app-row:nth-last-child(-n + 2) {
  border-bottom: 0;
}
.builtin {
  display: grid;
  place-items: center;
}
.builtin > .icon {
  width: 34px;
  height: 34px;
  stroke-width: 1.7;
}
.lime {
  background: #c8f35b;
  color: #273824;
}
.teal {
  background: #327d7d;
  color: #fff;
}
.orange {
  background: #f09249;
  color: #2d251e;
}
.blue {
  background: #dce8f4;
  color: #2e648e;
}
.green {
  background: #d3e7d5;
  color: var(--green);
}
.red {
  background: #eddddd;
  color: #a14d4d;
}
.guide-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.guide-card {
  position: relative;
  display: flex;
  background: #edf0e9;
  border-radius: 10px;
  min-height: 210px;
  padding: 24px;
  min-width: 0;
}
.guide-main {
  flex: 1;
  min-width: 0;
  display: flex;
  gap: 20px;
  align-items: center;
}
.guide-card .guide-main {
  display: block;
}
.guide-icon {
  display: grid;
  place-items: center;
  flex: 0 0 48px;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: #e6ebe2;
  color: var(--green);
}
.guide-card .guide-icon {
  width: 34px;
  height: 34px;
  background: none;
  display: block;
  margin-bottom: 20px;
}
.guide-card .guide-icon .icon {
  width: 29px;
  height: 29px;
}
.guide-card .meta {
  font-size: 11px;
}
.guide-card h3 {
  font-size: 17px;
  margin: 8px 0;
}
.guide-card p {
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
}
.guide-card .row-arrow {
  display: none;
}
.guide-card .bookmark {
  position: absolute;
  right: 12px;
  top: 13px;
}
.guide-card:hover {
  background: #e7ece2;
}
.beginner-band {
  margin-top: 60px;
  background: var(--green-dark);
  color: var(--paper);
  border-radius: var(--radius);
  padding: 38px 44px;
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 50px;
  align-items: center;
}
.band-label {
  font-size: 11px;
  color: #b6cfbc;
  letter-spacing: 1px;
  margin-bottom: 14px;
}
.beginner-band h2 {
  font-size: 31px;
  color: white;
}
.beginner-band p:not(.band-label) {
  font-size: 14px;
  color: #cad8cd;
  margin-top: 10px;
}
.beginner-band .button {
  margin-top: 23px;
}
.beginner-preview {
  list-style: none;
  padding: 0;
  margin: 0;
}
.beginner-preview li {
  padding: 17px 0;
  border-bottom: 1px solid #ffffff26;
  display: flex;
  gap: 23px;
  font-size: 14px;
}
.beginner-preview li:last-child {
  border: 0;
}
.beginner-preview span {
  color: #a8c0af;
  font-size: 12px;
}
.update-list > a {
  display: flex;
  align-items: center;
  gap: 26px;
  border-bottom: 1px solid var(--line);
  padding: 21px 0;
}
.update-list > a:last-child {
  border-bottom: 0;
}
.update-list time {
  font-size: 15px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.update-list h3 {
  font-size: 15px;
  font-weight: 560;
  flex: 1;
}
.update-list .icon {
  width: 19px;
  height: 19px;
}
.site-footer {
  border-top: 1px solid var(--line);
  padding: 37px 0 30px;
}
.footer-top {
  display: flex;
  align-items: center;
  gap: 36px;
  justify-content: space-between;
}
.footer-top .brand {
  font-size: 21px;
}
.footer-top p {
  font-size: 12px;
  color: var(--muted);
  margin-top: 8px;
}
.footer-links {
  display: flex;
  gap: 27px;
  font-size: 12px;
}
.footer-links a {
  padding: 12px 0;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  font-size: 11px;
  color: #737b74;
  margin-top: 28px;
  padding-top: 21px;
  border-top: 1px solid var(--line);
  line-height: 1.8;
}
.page-intro {
  padding: 49px 0 30px;
}
.page-intro > p {
  font-size: 16px;
  color: var(--muted);
  margin-top: 12px;
}
.filter-chips {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 24px 0;
}
.chip {
  min-height: 44px;
  min-width: 64px;
  padding: 10px 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
  border-radius: 25px;
  background: #eceedf70;
  color: #596359;
  font-size: 14px;
  white-space: nowrap;
}
.chip:hover {
  background: #e2e8db;
  color: var(--green);
}
.chip.active {
  background: var(--green);
  color: white;
}
.filter-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 24px;
}
.filter-bar select {
  max-width: 100%;
  min-height: 44px;
  background: transparent;
  border: 1px solid #ccd4c9;
  border-radius: 7px;
  padding: 8px 34px 8px 14px;
  color: var(--ink);
  font-size: 13px;
}
.reset-link {
  min-height: 44px;
  font-size: 13px;
  color: var(--muted);
  text-decoration: underline;
  text-underline-offset: 4px;
}
.result-count {
  margin-top: 24px;
  font-size: 13px;
  color: var(--muted);
}
.catalog-grid {
  margin-top: 4px;
}
.catalog-grid .app-row {
  min-height: 154px;
}
.catalog-note {
  font-size: 12px;
  line-height: 1.9;
  color: var(--muted);
  margin-top: 35px;
  border-top: 1px solid var(--line);
  padding-top: 22px;
}
.catalog-note a {
  text-decoration: underline;
  margin-left: 8px;
  color: var(--green);
}
.guide-list {
  margin-top: 8px;
}
.guide-list .guide-row {
  position: relative;
  display: flex;
  gap: 10px;
  border-bottom: 1px solid var(--line);
  padding: 27px 0;
}
.guide-list .guide-main > div {
  flex: 1;
}
.guide-list .guide-main h3 {
  margin: 5px 0;
  font-size: 20px;
}
.guide-list .guide-main p {
  font-size: 14px;
  color: var(--muted);
}
.guide-list .row-arrow {
  width: 20px;
  margin-right: 10px;
}
.guide-list .bookmark {
  align-self: center;
}
.guide-cards.two {
  grid-template-columns: 1fr 1fr;
}
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--muted);
  padding: 25px 0 32px;
}
.breadcrumbs a {
  padding: 10px 0;
}
.breadcrumbs .icon {
  width: 13px;
  height: 13px;
}
.breadcrumbs > span {
  color: #8b928a;
}
.app-detail-header {
  display: flex;
  align-items: center;
  gap: 26px;
}
.app-detail-header .app-icon {
  width: 100px;
  height: 100px;
  flex-basis: 100px;
  border-radius: 24px;
}
.app-detail-header .builtin .icon {
  width: 52px;
  height: 52px;
}
.app-detail-header h1 {
  font-size: 40px;
  margin: 6px 0;
}
.app-detail-header p {
  font-size: 17px;
  color: var(--muted);
}
.detail-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 28px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--line);
}
.detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 740px) minmax(0, 260px);
  gap: 70px;
  margin-top: 35px;
}
.article-body {
  font-size: 16px;
  line-height: 1.95;
  color: #414c44;
}
.article-body section {
  margin-top: 38px;
  scroll-margin-top: 25px;
}
.article-body h2 {
  font-size: 24px;
  margin-bottom: 18px;
  color: var(--ink);
}
.article-body h3 {
  font-size: 17px;
  margin: 24px 0 8px;
  color: var(--ink);
}
.article-body p {
  line-height: 1.95;
  margin: 12px 0;
}
.article-body .article-lead {
  font-size: 18px;
  line-height: 1.95;
  color: #465449;
  margin-top: 0;
}
.check-list {
  padding: 0;
  list-style: none;
  margin: 0;
}
.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 13px;
  padding: 9px 0;
}
.check-list .icon {
  width: 20px;
  height: 20px;
  margin-top: 6px;
  color: var(--green);
}
.callout {
  padding: 20px 25px;
  background: #eaf0e4;
  border-left: 3px solid #93ab8c;
  border-radius: 0 8px 8px 0;
  font-size: 14px;
}
.callout strong {
  color: var(--green);
  font-size: 13px;
}
.callout p {
  margin: 7px 0 0 !important;
  line-height: 1.9;
}
.source-note {
  margin-top: 42px;
  padding-top: 25px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--muted);
}
.source-note strong {
  color: var(--ink);
  font-size: 13px;
}
.source-note p {
  line-height: 1.9;
  margin: 9px 0;
}
.source-note .text-link {
  font-size: 12px;
}
.reading-aside {
  padding-top: 3px;
  align-self: start;
  position: sticky;
  top: 25px;
}
.aside-title {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--muted);
  padding-bottom: 17px;
  border-bottom: 1px solid var(--line);
}
.reading-aside > a {
  display: flex;
  gap: 12px;
  align-items: center;
  font-size: 13px;
  line-height: 1.7;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.reading-aside > a > .icon {
  width: 19px;
  height: 19px;
  color: var(--green);
}
.reading-aside > a > .icon:last-child {
  width: 13px;
  margin-left: auto;
  color: var(--muted);
}
.reading-aside small {
  display: block;
  font-size: 11px;
  color: var(--muted);
  margin-top: 4px;
}
.aside-note {
  font-size: 12px;
  color: var(--muted);
  margin-top: 20px;
}
.related {
  padding-top: 40px;
  border-top: 1px solid var(--line);
}
.article-category {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--green);
  font-size: 13px;
  margin-bottom: 16px;
}
.article-category .icon {
  width: 20px;
  height: 20px;
}
.article-header h1 {
  max-width: 850px;
  font-size: 40px;
  line-height: 1.5;
}
.article-deck {
  font-size: 17px;
  margin-top: 15px;
  color: var(--muted);
}
.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 24px;
  padding-bottom: 25px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}
.article-meta > span {
  display: flex;
  gap: 6px;
  align-items: center;
}
.article-meta > span > .icon {
  width: 16px;
  height: 16px;
}
.article-meta > .bookmark {
  margin-left: auto;
}
.article-meta .button {
  font-size: 12px;
  min-height: 40px;
  padding: 8px 15px;
}
.article-meta > .icon-button {
  color: var(--ink);
}
.step-section h2 {
  display: flex;
  align-items: baseline;
  gap: 15px;
}
.step-number {
  font-size: 16px;
  font-variant-numeric: tabular-nums;
  color: #6b8d6e;
}
.toc-index {
  font-size: 11px;
  color: #82927f;
  min-width: 20px;
}
.success-note {
  display: flex;
  gap: 17px;
  background: #e8eee1;
  padding: 23px;
  border-radius: 8px;
}
.success-note > .icon {
  margin-top: 5px;
  color: var(--green);
}
.success-note h2 {
  font-size: 17px;
  margin-bottom: 5px;
}
.success-note p {
  font-size: 14px;
  margin: 0;
}
.article-body details {
  border-bottom: 1px solid var(--line);
}
.article-body summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  font-size: 15px;
  color: var(--ink);
  padding: 20px 0;
  list-style: none;
}
.article-body summary::-webkit-details-marker {
  display: none;
}
.article-body summary .icon {
  width: 17px;
  height: 17px;
  transition: transform 0.2s;
}
.article-body details[open] summary .icon {
  transform: rotate(90deg);
}
.article-body details > p {
  font-size: 14px;
  margin: 0 0 20px;
}
.topic-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}
.topic-card {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  min-width: 0;
}
.sage {
  background: var(--sage);
  color: var(--ink);
}
.forest {
  background: var(--green-dark);
  color: var(--paper);
}
.lavender {
  background: #e9e7ef;
  color: #403c51;
}
.sand {
  background: #ede9df;
  color: #584d3b;
}
.topic-card > a {
  display: block;
  padding: 30px;
}
.topic-card-top {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 32px;
  font-size: 11px;
  opacity: 0.8;
  padding-right: 25px;
}
.topic-card-top .icon {
  width: 27px;
  height: 27px;
}
.topic-card h2 {
  font-size: 24px;
  max-width: 350px;
  margin-bottom: 12px;
  line-height: 1.6;
}
.topic-card p {
  font-size: 14px;
  max-width: 400px;
  opacity: 0.75;
}
.topic-card .text-link {
  margin-top: 18px;
  color: inherit;
}
.topic-card > .bookmark {
  position: absolute;
  right: 14px;
  top: 15px;
}
.topic-card a:hover {
  color: inherit;
}
.forest .bookmark:hover {
  background: #ffffff18;
}
.forest .bookmark.is-saved {
  color: #dbedbd;
}
.topic-header {
  border-radius: 12px;
  overflow: hidden;
  display: flex;
}
.topic-header > div {
  padding: 42px;
  flex: 1;
}
.topic-header img {
  width: 45%;
  object-fit: cover;
}
.topic-header .article-category {
  color: inherit;
  opacity: 0.75;
}
.topic-header h1 {
  font-size: 38px;
  line-height: 1.55;
  max-width: 590px;
}
.topic-header p {
  font-size: 15px;
  margin-top: 16px;
  opacity: 0.8;
}
.topic-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  align-items: center;
  font-size: 12px;
  margin-top: 25px;
}
.forest .secondary {
  border-color: #a3baa3;
  color: inherit;
}
.forest .secondary:hover {
  background: #ffffff12;
}
.topic-intro {
  max-width: 740px;
  margin: 40px 0 28px;
}
.topic-intro p {
  font-size: 16px;
  color: var(--muted);
  margin-top: 15px;
  line-height: 1.95;
}
.topic-path {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin: 30px 0 0;
}
.topic-path li {
  border-top: 1px solid #bbc9b6;
  padding-top: 18px;
}
.topic-path span {
  color: #6d846c;
  font-size: 13px;
}
.topic-path p {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.8;
  max-width: 260px;
}
.checklist-panel {
  margin-top: 35px;
  background: #edf1e8;
  border-radius: 12px;
  padding: 28px;
}
.checklist-panel .section-head {
  margin-bottom: 15px;
}
.checklist-panel h2 {
  font-size: 20px;
}
.checklist-panel .section-head > span {
  font-size: 12px;
  color: var(--green);
  white-space: nowrap;
}
.progress-track {
  height: 4px;
  background: #d8e0d2;
  border-radius: 4px;
  margin-bottom: 12px;
  overflow: hidden;
}
.progress-track > span {
  display: block;
  height: 100%;
  background: var(--green);
  transition: width 0.25s;
}
.checklist-row {
  display: flex;
  align-items: center;
  border-bottom: 1px solid #dce3d5;
  gap: 15px;
}
.checklist-row > label {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: 1;
  cursor: pointer;
  padding: 17px 0;
  font-size: 15px;
  line-height: 1.7;
}
.checklist-row input {
  accent-color: var(--green);
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin: 0;
}
.checklist-row input:checked + span {
  text-decoration: line-through;
  color: #7d897a;
}
.checklist-row > a {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  color: var(--green);
}
.checklist-panel > .meta {
  margin-top: 17px;
}
.saved-note {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--muted);
  padding: 17px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  line-height: 1.8;
}
.saved-note .icon {
  width: 20px;
}
.empty-state {
  padding: 70px 20px 90px;
  text-align: center;
}
.empty-state > .icon {
  width: 36px;
  height: 36px;
  color: #8c9f87;
  margin-bottom: 20px;
}
.empty-state h2 {
  font-size: 25px;
}
.empty-state p {
  font-size: 14px;
  color: var(--muted);
  margin: 14px auto 25px;
  max-width: 450px;
}
.about-page {
  max-width: 760px;
  margin-inline: auto;
}
.about-page .button {
  margin-top: 30px;
}
.not-found {
  padding: 100px 0;
  text-align: center;
}
.not-found > span {
  font-size: 80px;
  letter-spacing: -5px;
  color: #cad8c4;
  font-weight: 750;
}
.not-found h1 {
  font-size: 30px;
  margin: 15px 0;
}
.not-found > p {
  color: var(--muted);
  margin-bottom: 25px;
}
.toast {
  position: fixed;
  bottom: 25px;
  left: 50%;
  transform: translate(-50%, 15px);
  opacity: 0;
  pointer-events: none;
  background: var(--ink);
  color: white;
  box-shadow: 0 6px 20px #0002;
  padding: 14px 22px;
  border-radius: 9px;
  font-size: 13px;
  line-height: 1.7;
  max-width: calc(100% - 32px);
  width: max-content;
  z-index: 100;
  transition:
    opacity 0.2s,
    transform 0.2s;
}
.toast.visible {
  opacity: 1;
  transform: translate(-50%, 0);
}
.load-error {
  padding: 15px 20px;
  background: #f4e5c9;
  margin-top: 20px;
  font-size: 14px;
  line-height: 1.8;
}
.load-error button {
  text-decoration: underline;
  margin-left: 15px;
  min-height: 44px;
}
.noscript {
  padding: 15px;
  color: var(--green);
  font-size: 14px;
  line-height: 1.8;
}
.reading-aside > a:hover,
.guide-main:hover h3 {
  color: var(--green);
}
@media (min-width: 1450px) {
  :root {
    --container: 1280px;
  }
  .feature-image {
    min-height: 350px;
  }
  .feature-content {
    padding: 40px 45px;
  }
  .feature h2 {
    font-size: 36px;
  }
  .hero h1 {
    font-size: 64px;
  }
  .feature-content > p:not(.feature-label) {
    font-size: 15px;
  }
}
@media (max-width: 1000px) {
  .container {
    width: calc(100% - 48px);
  }
  .desktop-nav {
    gap: 23px;
  }
  .header-inner {
    gap: 18px;
  }
  .header-tools {
    margin-left: 0;
  }
  .brand {
    font-size: 24px;
  }
  .hero h1 {
    font-size: 49px;
  }
  .hero-note {
    max-width: 140px;
    line-height: 1.8;
  }
  .feature-content {
    padding: 27px;
  }
  .feature h2 {
    font-size: 27px;
  }
  .feature-image {
    min-height: 330px;
  }
  .feature-actions {
    gap: 10px;
  }
  .app-grid {
    column-gap: 30px;
  }
  .guide-cards {
    gap: 12px;
  }
  .guide-card {
    padding: 21px;
  }
  .guide-card h3 {
    font-size: 16px;
  }
  .scene-nav a {
    gap: 10px;
    font-size: 12px;
  }
  .scene-nav a > .icon {
    width: 24px;
    height: 24px;
  }
  .detail-layout {
    grid-template-columns: minmax(0, 1fr) 225px;
    gap: 35px;
  }
  .article-header h1 {
    font-size: 35px;
  }
  .topic-header h1 {
    font-size: 31px;
  }
  .beginner-band {
    gap: 25px;
    padding: 32px;
  }
  .beginner-band h2 {
    font-size: 27px;
  }
  .footer-links {
    gap: 18px;
  }
}
@media (max-width: 700px) {
  .container {
    width: calc(100% - 40px);
  }
  .site-header {
    height: 64px;
  }
  .brand {
    font-size: 23px;
    gap: 8px;
    letter-spacing: -1px;
  }
  .brand > .icon {
    width: 24px;
    height: 28px;
  }
  .desktop-nav {
    display: none;
  }
  .header-inner {
    justify-content: space-between;
    gap: 12px;
  }
  .header-tools {
    gap: 2px;
  }
  .header-tools .icon {
    width: 22px;
    height: 22px;
  }
  .icon-button {
    width: 44px;
    height: 44px;
  }
  .bottom-nav {
    position: fixed;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    bottom: 0;
    left: 0;
    right: 0;
    padding: 6px 10px calc(6px + env(safe-area-inset-bottom));
    background: rgba(247, 248, 244, 0.97);
    border-top: 1px solid var(--line);
    backdrop-filter: blur(14px);
    z-index: 20;
  }
  .bottom-nav a {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    height: 49px;
    font-size: 10px;
    color: #798077;
    position: relative;
  }
  .bottom-nav a .icon {
    width: 21px;
    height: 21px;
  }
  .bottom-nav a[aria-current="page"] {
    color: var(--green);
    font-weight: 650;
  }
  .bottom-nav a[aria-current="page"]:before {
    content: "";
    position: absolute;
    top: -7px;
    width: 24px;
    height: 2px;
    border-radius: 1px;
    background: var(--green);
  }
  body {
    padding-bottom: calc(65px + env(safe-area-inset-bottom));
  }
  main {
    padding-bottom: 42px;
  }
  .hero {
    padding: 28px 0 23px;
  }
  .hero h1 {
    font-size: 36px;
    line-height: 1.35;
    letter-spacing: -1.8px;
  }
  .hero-note {
    display: none;
  }
  .hero-description {
    font-size: 13px;
    line-height: 1.8;
    max-width: 300px;
    margin: 12px 0 0;
  }
  .feature {
    grid-template-columns: 1fr;
  }
  .feature-image {
    min-height: 0;
    height: auto;
    aspect-ratio: 1.7;
  }
  .feature-content {
    padding: 23px 24px 26px;
  }
  .feature-label {
    font-size: 10px;
    margin-bottom: 10px;
  }
  .feature h2 {
    font-size: 28px;
    line-height: 1.5;
    letter-spacing: -0.8px;
  }
  .feature-content > p:not(.feature-label) {
    font-size: 12px;
    margin-top: 10px;
    max-width: 100%;
  }
  .feature-actions {
    margin-top: 20px;
    gap: 12px;
  }
  .feature-actions .button {
    font-size: 12px;
    padding: 10px 14px;
    min-height: 43px;
    gap: 9px;
  }
  .feature-actions .meta {
    font-size: 10px;
  }
  .scene-nav {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    padding-top: 22px;
    gap: 0;
  }
  .scene-nav a {
    flex-direction: column;
    gap: 8px;
    min-height: 65px;
    font-size: 10px;
    font-weight: 500;
    border-right: 1px solid var(--line);
  }
  .scene-nav a > .icon {
    width: 23px;
    height: 23px;
  }
  .section {
    margin-top: 39px;
  }
  .section-head {
    gap: 12px;
    margin-bottom: 12px;
    align-items: center;
  }
  h2 {
    font-size: 21px;
    letter-spacing: -0.6px;
  }
  .section-head h2 {
    font-size: 21px;
  }
  .section-head p {
    font-size: 12px;
    line-height: 1.8;
    margin-top: 7px;
  }
  .section-head .text-link {
    font-size: 11px;
    gap: 3px;
  }
  .section-head .text-link .icon {
    width: 15px;
  }
  .app-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }
  .app-row,
  .app-row.compact {
    padding: 21px 0;
    gap: 3px;
  }
  .app-row .bookmark {
    margin-right: -7px;
  }
  .app-main {
    gap: 14px;
  }
  .app-icon {
    width: 54px;
    height: 54px;
    flex-basis: 54px;
    border-radius: 13px;
  }
  .app-copy h3 {
    font-size: 17px;
    margin-bottom: 5px;
  }
  .app-copy p,
  .app-row.compact p {
    font-size: 12px;
    line-height: 1.8;
    margin-bottom: 5px;
  }
  .app-meta {
    font-size: 11px;
    gap: 5px;
  }
  .app-grid > .app-row:nth-last-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }
  .app-grid > .app-row:last-child {
    border-bottom: 0;
  }
  .app-row .bookmark .icon {
    width: 21px;
    height: 21px;
  }
  .builtin > .icon {
    width: 29px;
    height: 29px;
  }
  .guide-cards,
  .guide-cards.two {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }
  .guide-card {
    padding: 20px;
    min-height: 0;
  }
  .guide-card .guide-main {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding-right: 18px;
  }
  .guide-card .guide-icon {
    margin: 4px 0 0;
    flex-basis: 28px;
    width: 28px;
    height: 28px;
  }
  .guide-card .guide-icon .icon {
    width: 25px;
    height: 25px;
  }
  .guide-card h3 {
    font-size: 16px;
    margin: 4px 0 7px;
  }
  .guide-card p {
    font-size: 12px;
    max-width: 240px;
  }
  .guide-card .meta {
    font-size: 10px;
  }
  .guide-card > .bookmark {
    right: 5px;
    top: 10px;
  }
  .guide-card .bookmark .icon {
    width: 18px;
    height: 18px;
  }
  .beginner-band {
    grid-template-columns: 1fr;
    gap: 0;
    padding: 27px 25px;
    margin-top: 39px;
  }
  .band-label {
    font-size: 10px;
    margin-bottom: 12px;
  }
  .beginner-band h2 {
    font-size: 25px;
    letter-spacing: -0.8px;
  }
  .beginner-band p:not(.band-label) {
    font-size: 12px;
    margin-top: 9px;
  }
  .beginner-band .button {
    font-size: 12px;
    min-height: 43px;
    padding: 10px 16px;
    margin-top: 20px;
  }
  .beginner-preview {
    margin-top: 25px;
    border-top: 1px solid #ffffff26;
  }
  .beginner-preview li {
    font-size: 12px;
    padding: 13px 0;
    gap: 20px;
  }
  .beginner-preview span {
    font-size: 10px;
  }
  .updates .section-head {
    align-items: flex-start;
  }
  .updates .section-head .text-link {
    font-size: 10px;
  }
  .update-list > a {
    gap: 14px;
    flex-wrap: wrap;
    position: relative;
    padding: 20px 30px 20px 0;
  }
  .update-list time {
    font-size: 12px;
  }
  .update-list .meta {
    font-size: 10px;
  }
  .update-list h3 {
    font-size: 14px;
    flex-basis: 100%;
    font-weight: 570;
    line-height: 1.7;
  }
  .update-list .icon {
    position: absolute;
    right: 0;
    bottom: 24px;
    width: 17px;
  }
  .site-footer {
    padding: 27px 0 22px;
  }
  .footer-top {
    display: block;
  }
  .footer-top .brand {
    font-size: 21px;
  }
  .footer-top .brand > .icon {
    width: 23px;
  }
  .footer-top p {
    font-size: 11px;
  }
  .footer-links {
    gap: 23px;
    font-size: 11px;
    margin-top: 14px;
  }
  .footer-bottom {
    display: block;
    font-size: 10px;
    margin-top: 15px;
    padding-top: 17px;
  }
  .footer-bottom > span {
    display: block;
    margin-top: 6px;
  }
  .page-intro {
    padding: 31px 0 23px;
  }
  .watch-apps-entry {
    gap: 12px;
    padding: 14px;
    margin: 0 0 22px;
  }
  .watch-apps-entry strong {
    font-size: 14px;
  }
  .watch-apps-entry small {
    font-size: 11px;
  }
  .our-apps-page {
    padding: 12px 0 47px;
  }
  .our-apps-hero {
    display: block;
    padding: 12px 0 28px;
  }
  .our-apps-hero h1 {
    font-size: 34px;
    line-height: 1.4;
    letter-spacing: -1.5px;
  }
  .our-apps-hero p {
    margin-top: 11px;
    font-size: 14px;
    line-height: 1.85;
  }
  .our-apps-count {
    display: block;
    min-height: 0;
    margin-top: 22px;
    padding: 0 0 0 15px;
    border-left: 2px solid var(--green);
  }
  .our-apps-count strong {
    margin-right: 8px;
    font-size: 30px;
  }
  .our-apps-count span {
    font-size: 12px;
  }
  .source-banner {
    flex-wrap: wrap;
    gap: 4px 7px;
    margin-top: 20px;
    padding: 10px 13px;
    font-size: 12px;
  }
  .source-banner-note {
    flex-basis: 100%;
    margin-left: 0;
    font-size: 11px;
  }
  .our-apps-list {
    margin-top: 37px;
  }
  .our-apps-list .section-head {
    margin-bottom: 11px;
  }
  .our-app-row,
  .our-app-row.is-source {
    min-height: 0;
    gap: 12px;
    padding: 17px 0;
  }
  .our-app-row.is-source {
    padding-inline: 12px;
  }
  .our-app-main {
    gap: 12px;
  }
  .our-app-main .app-icon {
    width: 56px;
    height: 56px;
    flex-basis: 56px;
    border-radius: 13px;
  }
  .our-app-main h3 {
    font-size: 17px;
  }
  .our-app-main p {
    font-size: 12px;
    line-height: 1.6;
  }
  .our-app-row .button {
    min-width: 0;
    min-height: 42px;
    padding: 8px 10px;
    gap: 5px;
    font-size: 11px;
  }
  .our-app-row .button .icon {
    width: 14px;
    height: 14px;
  }
  .our-apps-note {
    margin-top: 22px;
    font-size: 11px;
  }
  h1 {
    font-size: 32px;
    letter-spacing: -1.3px;
  }
  .page-intro h1 {
    font-size: 32px;
    line-height: 1.5;
  }
  .page-intro > p {
    font-size: 13px;
    margin-top: 9px;
  }
  .filter-chips {
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    margin: 20px -20px;
    padding: 0 20px 4px;
    gap: 8px;
  }
  .filter-chips::-webkit-scrollbar {
    display: none;
  }
  .chip {
    font-size: 12px;
    min-width: 60px;
    min-height: 42px;
    padding: 9px 19px;
  }
  .filter-bar {
    padding-bottom: 18px;
    gap: 15px;
  }
  .filter-bar select {
    font-size: 12px;
    min-height: 44px;
  }
  .reset-link {
    font-size: 12px;
    margin-left: auto;
  }
  .result-count {
    font-size: 12px;
    margin-top: 19px;
  }
  .catalog-grid .app-row {
    min-height: 0;
    padding: 23px 0;
  }
  .catalog-note {
    font-size: 11px;
    margin-top: 25px;
  }
  .guide-list .guide-row {
    padding: 22px 0;
    gap: 0;
  }
  .guide-list .guide-main {
    gap: 13px;
    align-items: flex-start;
  }
  .guide-list .guide-icon {
    width: 38px;
    height: 38px;
    flex-basis: 38px;
    border-radius: 9px;
    margin-top: 3px;
  }
  .guide-list .guide-icon .icon {
    width: 22px;
    height: 22px;
  }
  .guide-list .guide-main h3 {
    font-size: 16px;
    margin: 5px 0 7px;
  }
  .guide-list .guide-main p {
    font-size: 12px;
  }
  .guide-list .meta {
    font-size: 10px;
  }
  .guide-list .row-arrow {
    display: none;
  }
  .guide-list .bookmark {
    margin-right: -8px;
  }
  .guide-list .bookmark .icon {
    width: 19px;
    height: 19px;
  }
  .breadcrumbs {
    font-size: 11px;
    padding: 15px 0 22px;
    gap: 7px;
  }
  .app-detail-header {
    align-items: flex-start;
    gap: 17px;
  }
  .app-detail-header .app-icon {
    width: 76px;
    height: 76px;
    flex-basis: 76px;
    border-radius: 18px;
  }
  .app-detail-header .builtin .icon {
    width: 40px;
    height: 40px;
  }
  .app-detail-header .meta {
    font-size: 11px;
  }
  .app-detail-header h1 {
    font-size: 28px;
    margin: 4px 0;
    line-height: 1.3;
    letter-spacing: -1px;
    overflow-wrap: anywhere;
  }
  .app-detail-header p {
    font-size: 12px;
    line-height: 1.8;
  }
  .detail-actions {
    gap: 9px;
    margin-top: 23px;
    padding-bottom: 23px;
  }
  .detail-actions .button {
    font-size: 12px;
    padding: 10px 14px;
    min-height: 44px;
  }
  .detail-actions .icon-button {
    margin-left: auto;
  }
  .detail-layout {
    grid-template-columns: 1fr;
    gap: 30px;
    margin-top: 25px;
  }
  .article-body {
    font-size: 15px;
    line-height: 1.95;
  }
  .article-body .article-lead {
    font-size: 16px;
  }
  .article-body section {
    margin-top: 30px;
    scroll-margin-top: 20px;
  }
  .article-body h2 {
    font-size: 21px;
    margin-bottom: 15px;
  }
  .article-body h3 {
    font-size: 16px;
  }
  .article-body p {
    line-height: 1.95;
  }
  .check-list li {
    font-size: 14px;
    padding: 8px 0;
  }
  .callout {
    font-size: 13px;
    padding: 17px 19px;
  }
  .callout strong {
    font-size: 12px;
  }
  .source-note {
    margin-top: 30px;
    font-size: 11px;
    padding-top: 21px;
  }
  .source-note .text-link {
    font-size: 12px;
  }
  .reading-aside {
    position: static;
    padding: 20px;
    background: #edf0e9;
    border-radius: 10px;
  }
  .reading-aside > a {
    font-size: 13px;
  }
  .reading-aside .aside-note {
    font-size: 11px;
  }
  .related {
    padding-top: 30px;
  }
  .article-header h1 {
    font-size: 30px;
    letter-spacing: -1px;
    line-height: 1.55;
  }
  .article-category {
    font-size: 12px;
    margin-bottom: 13px;
  }
  .article-deck {
    font-size: 14px;
    line-height: 1.9;
    margin-top: 12px;
  }
  .article-meta {
    gap: 12px;
    margin-top: 15px;
    padding-bottom: 18px;
    font-size: 10px;
  }
  .article-meta > .bookmark {
    margin-left: 0;
  }
  .article-meta .button {
    font-size: 11px;
    padding: 8px 10px;
    min-height: 44px;
  }
  .article-meta > .icon-button {
    margin-left: auto;
  }
  .guide-detail .detail-layout {
    display: flex;
    flex-direction: column;
    gap: 25px;
  }
  .guide-detail .toc {
    order: -1;
    padding: 16px 20px;
  }
  .toc .aside-title {
    font-size: 11px;
    padding-bottom: 8px;
  }
  .toc > a {
    font-size: 12px;
    padding: 10px 0;
    border: 0;
    min-height: 44px;
  }
  .toc > a:last-child,
  .toc > a:nth-last-child(2) {
    display: none;
  }
  .step-section h2 {
    font-size: 20px;
    gap: 12px;
    line-height: 1.65;
  }
  .step-number {
    font-size: 13px;
  }
  .success-note {
    padding: 18px;
    gap: 12px;
  }
  .success-note h2 {
    font-size: 16px;
  }
  .success-note p {
    font-size: 13px;
  }
  .article-body summary {
    font-size: 14px;
    padding: 18px 0;
  }
  .article-body details > p {
    font-size: 13px;
  }
  .topic-grid {
    grid-template-columns: 1fr;
    gap: 17px;
  }
  .topic-card > a {
    padding: 25px;
  }
  .topic-card-top {
    font-size: 10px;
    margin-bottom: 22px;
  }
  .topic-card h2 {
    font-size: 24px;
    line-height: 1.6;
    max-width: 300px;
  }
  .topic-card p {
    font-size: 13px;
  }
  .topic-card .text-link {
    font-size: 12px;
    margin-top: 14px;
  }
  .topic-card > .bookmark {
    right: 11px;
    top: 12px;
  }
  .topic-header {
    display: flex;
    flex-direction: column;
  }
  .topic-header > div {
    padding: 27px 25px;
  }
  .topic-header img {
    width: 100%;
    max-height: 220px;
    order: -1;
  }
  .topic-header h1 {
    font-size: 29px;
    line-height: 1.55;
    letter-spacing: -1px;
  }
  .topic-header p {
    font-size: 13px;
    margin-top: 14px;
  }
  .topic-meta {
    font-size: 11px;
    margin-top: 20px;
    gap: 16px;
  }
  .topic-meta .button {
    min-height: 43px;
    padding: 8px 13px;
    font-size: 12px;
  }
  .topic-intro {
    margin: 31px 0 23px;
  }
  .topic-intro h2 {
    font-size: 22px;
  }
  .topic-intro p {
    font-size: 14px;
    margin-top: 12px;
  }
  .topic-path {
    grid-template-columns: 1fr;
    gap: 0;
    margin-top: 20px;
  }
  .topic-path li {
    display: flex;
    gap: 18px;
    align-items: baseline;
    padding: 16px 0;
    border-top: 1px solid var(--line);
  }
  .topic-path span {
    font-size: 12px;
  }
  .topic-path p {
    font-size: 14px;
    margin: 0;
    max-width: none;
  }
  .checklist-panel {
    margin-top: 25px;
    padding: 21px 18px;
  }
  .checklist-panel h2 {
    font-size: 18px;
  }
  .checklist-panel .section-head {
    gap: 8px;
  }
  .checklist-panel .section-head > span {
    font-size: 10px;
  }
  .checklist-row > label {
    font-size: 13px;
    gap: 11px;
    padding: 15px 0;
  }
  .checklist-row {
    gap: 4px;
  }
  .checklist-row input {
    width: 19px;
    height: 19px;
  }
  .checklist-row > a {
    flex-shrink: 0;
    width: 35px;
  }
  .checklist-row .icon {
    width: 19px;
  }
  .checklist-panel > .meta {
    font-size: 10px;
  }
  .saved-note {
    font-size: 12px;
    align-items: flex-start;
  }
  .saved-note .icon {
    margin-top: 2px;
    flex-shrink: 0;
  }
  .empty-state {
    padding: 55px 0 70px;
  }
  .empty-state h2 {
    font-size: 23px;
  }
  .empty-state p {
    font-size: 13px;
    margin: 12px auto 22px;
  }
  .empty-state .button {
    font-size: 13px;
  }
  .about-page .page-intro h1 {
    font-size: 31px;
  }
  .about-page .article-lead {
    font-size: 16px;
  }
  .about-page section {
    margin-top: 30px;
  }
  .toast {
    bottom: calc(80px + env(safe-area-inset-bottom));
    font-size: 12px;
    padding: 13px 18px;
  }
  .not-found {
    padding: 70px 0;
  }
  .not-found h1 {
    font-size: 26px;
  }
  .not-found > p {
    font-size: 13px;
  }
}
@media (max-width: 370px) {
  .container {
    width: calc(100% - 32px);
  }
  .brand {
    font-size: 21px;
  }
  .header-tools {
    gap: 0;
  }
  .header-tools .icon-button {
    width: 40px;
    min-width: 40px;
  }
  .hero h1 {
    font-size: 32px;
  }
  .feature-content {
    padding: 22px;
  }
  .feature h2 {
    font-size: 26px;
  }
  .feature-actions {
    gap: 10px;
  }
  .feature-actions .meta {
    font-size: 9px;
  }
  .scene-nav a {
    font-size: 9px;
  }
  .section-head h2 {
    font-size: 19px;
  }
  .section-head p {
    font-size: 11px;
  }
  .app-main {
    gap: 11px;
  }
  .app-icon {
    width: 50px;
    height: 50px;
    flex-basis: 50px;
  }
  .app-copy h3 {
    font-size: 16px;
  }
  .filter-chips {
    margin-inline: -16px;
    padding-inline: 16px;
  }
  .article-meta {
    gap: 9px;
  }
}
@media (min-width: 701px) {
  .feature-image {
    height: 350px;
    min-height: 0;
  }
  .feature-image img {
    height: 100%;
    width: 100%;
    object-fit: cover;
  }
}
@media (min-width: 1450px) {
  :root {
    --container: 1344px;
  }
  .feature-image {
    height: 377px;
  }
  .hero h1 {
    font-size: 70px;
    line-height: 1.2;
    letter-spacing: -2px;
  }
  .hero-description {
    font-size: 19px;
  }
  .feature h2 {
    font-size: 36px;
  }
  .feature-content > p:not(.feature-label) {
    font-size: 16px;
  }
  .brand {
    font-size: 28px;
  }
}
/* Keep secondary copy readable on mobile. */
@media (max-width: 700px) {
  .hero-description {
    font-size: 14px;
    max-width: 330px;
  }
  .feature-content > p:not(.feature-label) {
    font-size: 14px;
  }
  .feature-actions .button {
    font-size: 13px;
  }
  .feature-actions .meta {
    font-size: 11px;
  }
  .app-copy p,
  .app-row.compact p {
    font-size: 14px;
  }
  .app-meta {
    font-size: 12px;
  }
  .guide-card p,
  .guide-list .guide-main p {
    font-size: 14px;
  }
  .guide-card .meta,
  .guide-list .meta {
    font-size: 11px;
  }
  .section-head p {
    font-size: 13px;
  }
  .scene-nav a {
    font-size: 11px;
  }
  .bottom-nav a {
    font-size: 11px;
  }
  .app-detail-header p {
    font-size: 14px;
  }
  .article-body {
    font-size: 16px;
  }
  .article-meta {
    font-size: 11px;
  }
  .topic-card p,
  .topic-header p {
    font-size: 14px;
  }
}
@media (max-width: 370px) {
  .scene-nav a {
    font-size: 10px;
  }
  .feature-actions {
    align-items: flex-start;
    flex-direction: column;
  }
  .section-head .text-link {
    font-size: 10px;
  }
  .section-head {
    gap: 8px;
  }
}
@media (max-width: 700px) {
  .hero {
    padding-top: 24px;
    padding-bottom: 14px;
  }
  .hero h1 {
    font-size: 34px;
  }
  .hero-description {
    margin-bottom: 16px;
  }
  .feature-image {
    aspect-ratio: 1.9;
  }
  .feature-content {
    padding-top: 21px;
    padding-bottom: 23px;
  }
  .feature-actions .button,
  .chip,
  .beginner-band .button,
  .topic-meta .button {
    min-height: 44px;
  }
  .guide-detail .toc {
    width: 100%;
    align-self: stretch;
  }
  .checklist-row > a {
    width: 44px;
  }
  .section-head h2 {
    line-height: 1.55;
  }
}
@media (prefers-reduced-motion: reduce) {
  *,
  *:before,
  *:after {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }
}