:root {
  color-scheme: light;
  --ink: #121212;
  --paper: #f6f7f2;
  --surface: #fffffb;
  --muted: #52555a;
  --line: #d7d4c9;
  --red: #f04438;
  --blue: #1264ff;
  --green: #12835f;
  --purple: #946ce6;
  --yellow: #f6c343;
  --night: #101114;
  --night-2: #17191f;
  --nav-height: 60px;
  --content-max: 1160px;
  --section-y: 52px;
  --shadow: 0 16px 48px rgba(10, 12, 18, 0.16);
  --font-display: 'Aptos Display', 'Segoe UI Variable Display', 'SF Pro Display', 'Helvetica Neue', sans-serif;
  --font-body: 'Aptos', 'Segoe UI Variable Text', 'SF Pro Text', 'Helvetica Neue', sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  /* Sticky header clearance for in-page anchors (avoid also setting scroll-margin on targets). */
  scroll-padding-top: calc(var(--nav-height) + 12px);
}

body {
  margin: 0;
  background:
    linear-gradient(90deg, rgba(18, 18, 18, 0.035) 1px, transparent 1px) 0 0 / 80px 80px,
    var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  text-rendering: optimizeLegibility;
  -webkit-tap-highlight-color: rgba(18, 100, 255, 0.16);
}

a {
  color: inherit;
}

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

.content-wrap {
  width: min(100%, var(--content-max));
  margin-inline: auto;
  padding-inline: clamp(18px, 4vw, 32px);
}

.skip-link {
  position: absolute;
  top: -48px;
  left: 16px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  font-weight: 800;
  text-decoration: none;
}

.skip-link:focus-visible {
  top: 12px;
}

:focus {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

.site-header {
  position: sticky;
  z-index: 40;
  top: 0;
  border-bottom: 1px solid rgba(18, 18, 18, 0.12);
  background: rgba(255, 255, 251, 0.9);
  color: var(--ink);
  backdrop-filter: blur(16px) saturate(1.2);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--nav-height);
}

.site-header::after {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--red), var(--blue), var(--green));
  content: '';
  opacity: 0.72;
}

.brand,
.nav-links,
.header-actions {
  display: flex;
  align-items: center;
}

.header-actions {
  gap: 10px;
}

.lang-switch {
  display: inline-flex;
  padding: 3px;
  border: 1px solid rgba(18, 18, 18, 0.12);
  border-radius: 999px;
  background: rgba(18, 18, 18, 0.04);
  gap: 2px;
}

.lang-btn {
  min-height: 32px;
  min-width: 44px;
  padding: 0 10px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 800;
  line-height: 1;
  cursor: pointer;
  touch-action: manipulation;
  transition:
    background-color var(--duration-quick) var(--ease-smooth-out),
    color var(--duration-quick) var(--ease-smooth-out);
}

.lang-btn[aria-pressed='true'] {
  background: var(--ink);
  color: #fff;
}

.lang-btn:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

.brand {
  gap: 10px;
  min-height: 44px;
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 900;
}

.brand img {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  box-shadow: 0 6px 16px rgba(240, 68, 56, 0.24);
}

.nav-links {
  gap: 6px;
  font-size: 14px;
  font-weight: 800;
}

.nav-links a {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 12px;
  border-radius: 999px;
  text-decoration: none;
  touch-action: manipulation;
  transition:
    background-color var(--duration-quick) var(--ease-smooth-out),
    color var(--duration-quick) var(--ease-smooth-out),
    transform var(--duration-quick) var(--ease-smooth-out);
}

.nav-links a:hover {
  background: rgba(18, 18, 18, 0.07);
  transform: translateY(-1px);
}

.nav-links .nav-cta {
  background: var(--ink);
  color: #fff;
}

.nav-links .nav-cta:hover {
  background: #2a2a2a;
}

.nav-links a[aria-current='page'] {
  background: rgba(18, 100, 255, 0.1);
  color: var(--blue);
}

.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-block: 48px 36px;
  background: var(--night);
  color: #fff;
}

.hero::after {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.07) 1px, transparent 1px) 0 0 / 96px 96px,
    linear-gradient(0deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px) 0 0 / 96px 96px;
  content: '';
  mask-image: linear-gradient(90deg, black, transparent 80%);
  opacity: 0.4;
}

.hero-image {
  position: absolute;
  inset: 0;
  z-index: -3;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 58%;
  opacity: 0.62;
}

.hero-shade {
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(90deg, rgba(8, 9, 11, 0.95) 0%, rgba(8, 9, 11, 0.72) 48%, rgba(8, 9, 11, 0.2) 100%),
    linear-gradient(0deg, rgba(8, 9, 11, 0.72), rgba(8, 9, 11, 0.08) 58%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.14fr) minmax(288px, 0.54fr);
  gap: 28px;
  align-items: end;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--yellow);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(52px, 7vw, 84px);
  font-weight: 950;
  line-height: 0.92;
  text-wrap: balance;
}

.hero-copy {
  max-width: 56ch;
  margin: 16px 0 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: clamp(17px, 2.2vw, 20px);
  line-height: 1.45;
  text-wrap: pretty;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 999px;
  text-decoration: none;
  font-weight: 900;
  touch-action: manipulation;
  transition:
    border-color var(--duration-quick) var(--ease-smooth-out),
    box-shadow var(--duration-quick) var(--ease-smooth-out),
    transform var(--duration-quick) var(--ease-smooth-out),
    background-color var(--duration-quick) var(--ease-smooth-out);
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  background: #fff;
  color: var(--ink);
  box-shadow: 0 12px 28px rgba(255, 255, 255, 0.1);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.button.secondary:hover {
  border-color: rgba(255, 255, 255, 0.55);
}

.hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.hero-chips li {
  padding: 6px 12px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  background: rgba(16, 17, 20, 0.62);
  font-size: 12px;
  font-weight: 800;
}

.hero-aside {
  padding: 18px 20px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 10px;
  background: rgba(16, 17, 20, 0.72);
  backdrop-filter: blur(12px);
}

.hero-aside-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 950;
}

.quick-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: quick-step;
  display: grid;
  gap: 10px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 14px;
  line-height: 1.4;
}

.quick-steps li {
  display: grid;
  grid-template-columns: 1.5rem minmax(9.25rem, auto) minmax(0, 1fr);
  column-gap: 10px;
  align-items: center;
  counter-increment: quick-step;
}

.quick-steps li::before {
  content: counter(quick-step);
  width: 1.5rem;
  height: 1.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.72);
  font-size: 11px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.quick-step-keys {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  min-width: 0;
}

.quick-step-desc {
  min-width: 0;
  color: rgba(255, 255, 255, 0.72);
  font-weight: 600;
}

.hero-aside kbd {
  color: var(--ink);
  background: #fff;
  border-color: rgba(18, 18, 18, 0.14);
}

.proof-band {
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

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

.proof-item {
  padding: 22px clamp(16px, 3vw, 28px);
  border-right: 1px solid var(--line);
}

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

.proof-item strong {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-display);
  font-size: 20px;
  line-height: 1.1;
}

.proof-item p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.feature-section {
  padding-block: var(--section-y);
}

.section-heading h2,
.bottom-intro h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(28px, 3.6vw, 42px);
  font-weight: 950;
  line-height: 1.02;
  text-wrap: pretty;
}

.section-lead {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.product-board {
  margin-top: 28px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.feature {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(250, 250, 245, 0.98)), var(--surface);
  box-shadow: 0 1px 0 rgba(18, 18, 18, 0.04);
  transition:
    box-shadow var(--duration-fast) var(--ease-smooth-out),
    transform var(--duration-fast) var(--ease-smooth-out);
}

.feature:hover {
  box-shadow: 0 14px 32px rgba(18, 18, 18, 0.08);
  transform: translateY(-2px);
}

.feature.t-scroll-reveal.is-revealed:hover {
  transform: translateY(-2px);
}

.feature-highlight {
  border-top: 4px solid var(--red);
}

.feature:nth-child(2) {
  border-top: 4px solid var(--blue);
}

.feature:nth-child(3) {
  border-top: 4px solid var(--green);
}

.feature h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.15;
}

.feature p,
.panel-caption,
.info-card-desc {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.58;
}

.showcase-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  align-items: stretch;
  margin-top: 14px;
}

.panel-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 1px 0 rgba(18, 18, 18, 0.04);
}

.panel-eyebrow {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.panel-title {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 950;
  line-height: 1.15;
}

.panel-media {
  margin: 12px 0 0;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border-radius: 8px;
  background: var(--night);
}

.panel-media img {
  width: 100%;
  height: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(18, 18, 18, 0.08);
}

/* 按图片自身比例完整显示（横条 / 4:3 截图），不套 16:9 裁切 */
.panel-media--auto {
  aspect-ratio: auto;
}

.panel-media--auto img {
  height: auto;
}

.panel-media {
  background: var(--paper);
}

.panel-media img {
  object-fit: cover;
  object-position: top center;
}

.panel-caption {
  margin-top: 10px;
  font-size: 13px;
}

.shortcut-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 0;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  list-style: none;
}

.shortcut-row li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  font-size: 13px;
  line-height: 1;
}

.shortcut-row li:not(:last-child)::after {
  margin-left: 8px;
  color: var(--line);
  content: '|';
}

.shortcut-label {
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.35em;
  min-height: 1.5em;
  padding: 0.1em 0.36em 0.13em;
  border: 1px solid rgba(18, 18, 18, 0.16);
  border-bottom-width: 1px;
  border-radius: 5px;
  background: #fff;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 0.86em;
  font-weight: 800;
  line-height: 1.15;
  vertical-align: 0.1em;
  box-shadow:
    0 1px 0 rgba(18, 18, 18, 0.1),
    inset 0 -1px 0 rgba(18, 18, 18, 0.08);
}

.kbd-combo {
  display: inline-flex;
  align-items: center;
  gap: 0.32em;
  vertical-align: 0.1em;
}

.kbd-plus {
  color: var(--muted);
  font-size: 0.82em;
  font-weight: 700;
  line-height: 1;
  user-select: none;
}

.hero-aside .kbd-plus {
  color: rgba(255, 255, 255, 0.5);
}

.bottom-section {
  padding-block: var(--section-y);
  border-top: 1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(18, 18, 18, 0.035) 1px, transparent 1px) 0 0 / 72px 72px,
    var(--surface);
}

.bottom-intro {
  margin-bottom: 24px;
}

.bottom-panels {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  align-items: stretch;
}

.bottom-panel {
  display: flex;
  flex-direction: column;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
}

.bottom-panel-label {
  margin: 0;
  color: var(--muted);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.info-list {
  display: grid;
  gap: 10px;
  margin-top: 12px;
  flex: 1;
}

.info-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-rows: auto auto;
  gap: 4px 12px;
  align-content: center;
  min-height: 74px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-left-width: 6px;
  border-radius: 8px;
  background: var(--paper);
  text-decoration: none;
  color: inherit;
  touch-action: manipulation;
  transition:
    box-shadow var(--duration-fast) var(--ease-smooth-out),
    transform var(--duration-fast) var(--ease-smooth-out);
}

a.info-card:hover {
  box-shadow: 0 10px 24px rgba(18, 18, 18, 0.07);
  transform: translateY(-1px);
}

a.info-card.t-scroll-reveal.is-revealed:hover {
  transform: translateY(-1px);
}

.info-card-dark {
  border-left-color: var(--ink);
}

.info-card-blue {
  border-left-color: var(--blue);
}

.info-card-green {
  border-left-color: var(--green);
}

.info-card-purple {
  border-left-color: var(--purple);
}

.info-card-title {
  grid-column: 1;
  grid-row: 1;
  margin: 0;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 950;
  line-height: 1.25;
}

.info-card-desc {
  grid-column: 1;
  grid-row: 2;
}

.info-card-mark {
  grid-column: 2;
  grid-row: 1 / -1;
  align-self: center;
  color: var(--muted);
  font-size: 18px;
  line-height: 1;
}

.site-footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-block: 20px;
  font-size: 14px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
}

.site-footer a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.site-footer a:hover {
  color: var(--ink);
}

@media (prefers-reduced-motion: no-preference) {
  .hero-image {
    animation: hero-drift 18s ease-in-out infinite alternate;
  }
}

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

  .hero-image {
    animation: none !important;
  }
}

@keyframes hero-drift {
  from {
    transform: scale(1.01);
  }

  to {
    transform: scale(1.035) translate3d(1%, -0.6%, 0);
  }
}

@media (max-width: 1024px) {
  .hero-grid,
  .bottom-panels,
  .showcase-row {
    grid-template-columns: 1fr;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .proof-grid {
    grid-template-columns: 1fr;
  }

  .proof-item {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

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

@media (max-width: 760px) {
  :root {
    --nav-height: 56px;
    --section-y: 40px;
  }

  .header-inner {
    flex-wrap: wrap;
    padding-block: 8px;
    min-height: 0;
    gap: 8px;
  }

  .header-actions {
    flex: 1 1 100%;
    order: 3;
    width: 100%;
    margin-left: 0;
    justify-content: space-between;
    gap: 8px;
  }

  .nav-links {
    display: flex;
    flex: 1 1 auto;
    min-width: 0;
    gap: 4px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .nav-links::-webkit-scrollbar {
    display: none;
  }

  .nav-links a {
    flex: 0 0 auto;
    min-height: 34px;
    padding: 0 10px;
    font-size: 13px;
  }

  .lang-switch {
    flex: 0 0 auto;
  }

  .hero {
    padding-block: 36px 28px;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }

  .footer-inner {
    flex-direction: column;
  }
}

/* —— Help page —— */

.help-page .help-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-block: clamp(20px, 2.8vw, 32px) 22px;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(255, 255, 251, 0.97), rgba(246, 247, 242, 0.94)),
    linear-gradient(90deg, rgba(18, 18, 18, 0.035) 1px, transparent 1px) 0 0 / 80px 80px,
    var(--paper);
}

.help-hero-ink {
  position: absolute;
  right: -4%;
  top: 8%;
  z-index: 0;
  width: min(52vw, 520px);
  pointer-events: none;
  opacity: 0.55;
}

.help-hero-ink__svg {
  width: 100%;
  height: auto;
  display: block;
}

.help-hero-ink__stroke {
  fill: none;
  stroke-width: 3.5;
}

.help-hero-ink__stroke--red {
  stroke: rgba(240, 68, 56, 0.45);
}

.help-hero-ink__stroke--blue {
  stroke: rgba(18, 100, 255, 0.4);
}

.help-hero-ink__stroke--green {
  stroke: rgba(18, 131, 95, 0.38);
}

.help-hero-ink__dot {
  fill: rgba(240, 68, 56, 0.5);
}

.help-hero-ink__frame {
  fill: none;
  stroke: rgba(18, 100, 255, 0.28);
  stroke-width: 2;
}

.help-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
  gap: clamp(18px, 2.5vw, 28px);
  align-items: start;
}

.help-hero-copy {
  min-width: 0;
  padding-top: 2px;
}

.help-eyebrow {
  margin: 0 0 10px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.help-title {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.help-title-brand {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--muted);
  line-height: 1.2;
}

.help-title-text {
  font-family: var(--font-display);
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 950;
  line-height: 1.05;
  letter-spacing: -0.02em;
  text-wrap: balance;
  color: var(--ink);
}

.help-lead {
  margin: 22px 0 0;
  max-width: 46ch;
  color: var(--muted);
  font-size: clamp(15px, 1.7vw, 16.5px);
  line-height: 1.5;
  text-wrap: pretty;
}

.help-video {
  margin: 12px 0 0;
}

.help-video--quick {
  margin-top: 14px;
}

.help-video-link {
  color: #1264ff;
  font-size: 14.5px;
  font-weight: 650;
  text-decoration: none;
}

.help-video-link:hover {
  text-decoration: underline;
}

.help-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

.help-hero-aside {
  position: relative;
  min-width: 0;
  padding: 16px 16px 14px;
  border: 1px solid rgba(18, 100, 255, 0.18);
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(255, 255, 251, 1), rgba(248, 250, 255, 0.98));
  box-shadow:
    0 1px 0 rgba(18, 100, 255, 0.06),
    0 18px 40px rgba(18, 40, 90, 0.1);
}

.help-hero-aside::before {
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  border-radius: 14px 14px 0 0;
  background: linear-gradient(90deg, var(--red), var(--blue), var(--green));
  content: '';
}

.help-aside-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.help-aside-title {
  margin: 0;
  color: var(--ink);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.help-aside-sub {
  margin: 0;
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
}

.help-aside-table {
  border-radius: 10px;
  border: 1px solid rgba(18, 18, 18, 0.06);
  overflow: hidden;
  background: rgba(255, 255, 251, 0.9);
}

.help-aside-table .help-shortcut-row {
  padding: 12px 14px;
  min-height: 46px;
}

.help-aside-table .help-shortcut-label {
  font-size: 13.5px;
  font-weight: 700;
}

.help-toc a {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink);
  font-size: 13px;
  font-weight: 800;
  text-decoration: none;
  transition:
    border-color var(--duration-quick) var(--ease-smooth-out),
    background-color var(--duration-quick) var(--ease-smooth-out),
    color var(--duration-quick) var(--ease-smooth-out),
    box-shadow var(--duration-quick) var(--ease-smooth-out),
    transform var(--duration-quick) var(--ease-smooth-out);
}

.help-toc a:hover {
  border-color: rgba(18, 100, 255, 0.35);
  background: rgba(18, 100, 255, 0.06);
  transform: translateY(-1px);
}

.help-toc a.is-active {
  border-color: rgba(18, 100, 255, 0.45);
  background: rgba(18, 100, 255, 0.12);
  color: var(--blue);
  box-shadow: 0 0 0 1px rgba(18, 100, 255, 0.08);
}

.help-section {
  padding-block: var(--section-y);
}

.help-section--tight-top {
  padding-top: clamp(24px, 3vw, 36px);
}

.help-section-alt {
  border-block: 1px solid var(--line);
  background: var(--surface);
}

.help-section-heading {
  max-width: 56ch;
  margin-bottom: 20px;
}

.help-section-eyebrow {
  margin: 0 0 6px;
  color: var(--blue);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.12em;
  font-variant-numeric: tabular-nums;
  text-transform: uppercase;
}

.help-section-heading h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 3.2vw, 36px);
  font-weight: 950;
  line-height: 1.1;
  text-wrap: pretty;
}

.help-section-lead {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.55;
}

.help-steps {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.help-steps--cards {
  gap: 14px;
}

@media (min-width: 900px) {
  .help-steps--cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .help-steps--cards .help-step {
    grid-template-columns: 1fr;
    gap: 12px;
    min-height: 100%;
  }
}

.help-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  box-shadow: 0 1px 0 rgba(18, 18, 18, 0.04);
}

.help-step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--ink);
  color: #fff;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 900;
}

.help-step h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 950;
  line-height: 1.2;
}

.help-step p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.help-shortcut-table,
.help-mini-table {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper);
  overflow: hidden;
}

.help-shortcut-head,
.help-shortcut-row {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  padding: 14px 18px;
}

.help-shortcut-head {
  border-bottom: 1px solid var(--line);
  background: rgba(18, 18, 18, 0.04);
  color: var(--muted);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.help-shortcut-row + .help-shortcut-row {
  border-top: 1px solid var(--line);
}

.help-shortcut-label {
  font-weight: 800;
  font-size: 14px;
}

.help-shortcut-keys {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
}

.help-mini-table .help-shortcut-row {
  grid-template-columns: minmax(0, 1fr) auto;
  justify-items: stretch;
}

.help-mini-table .help-shortcut-keys {
  justify-content: flex-end;
  text-align: right;
}

.help-key-sep {
  color: var(--line);
  font-weight: 700;
  user-select: none;
}

.help-note {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.help-note-tight {
  margin-top: 12px;
}

.help-grid {
  display: grid;
  gap: 12px;
}

.help-tool-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-bottom: 16px;
}

.help-tool-card--featured {
  grid-column: 1 / -1;
  padding: 14px 16px;
  background:
    linear-gradient(90deg, rgba(18, 18, 18, 0.04), transparent 48%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(250, 250, 245, 0.98)), var(--surface);
}

.help-tool-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 12px;
  row-gap: 2px;
  align-items: start;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(250, 250, 245, 0.98)), var(--surface);
  box-shadow: 0 1px 0 rgba(18, 18, 18, 0.04);
  transition:
    box-shadow var(--duration-fast) var(--ease-smooth-out),
    transform var(--duration-fast) var(--ease-smooth-out);
}

.help-tool-card:hover {
  box-shadow: 0 12px 28px rgba(18, 18, 18, 0.08);
  transform: translateY(-2px);
}

.help-tool-card.t-scroll-reveal.is-revealed:hover {
  transform: translateY(-2px);
}

.help-tool-card > kbd {
  grid-column: 1;
  grid-row: 1 / span 2;
  align-self: start;
  margin-bottom: 0;
}

.help-tool-card h3 {
  grid-column: 2;
  margin: 0;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 950;
  line-height: 1.2;
}

.help-tool-card p {
  grid-column: 2;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.help-draw-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 12px;
  align-items: stretch;
}

.help-draw-stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
  height: 100%;
}

/* Left: modifiers grow so column top/bottom match the right stack. */
.help-draw-stack--left > .help-panel {
  flex: 1 1 auto;
  min-height: 0;
}

.help-draw-stack--left > .help-panel .help-mini-table {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.help-draw-stack--left > .help-panel .help-shortcut-row {
  flex: 1;
  min-height: 44px;
}

/* Right: pin the last explain card to the column bottom when space remains. */
.help-draw-stack--right > .help-explain-card {
  margin-top: auto;
}

.help-panel {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper);
}

.help-panel h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 950;
  line-height: 1.2;
}

.help-panel .help-mini-table {
  background: var(--surface);
}

.help-panel .help-note-tight {
  margin-top: 12px;
  margin-bottom: 0;
}

.help-explain-card {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper);
}

.help-explain-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 950;
  line-height: 1.2;
}

.help-explain-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.help-tips-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.help-tip-card {
  padding: 18px;
  border: 1px solid var(--line);
  border-top-width: 4px;
  border-radius: 10px;
  background: var(--surface);
  box-shadow: 0 1px 0 rgba(18, 18, 18, 0.04);
}

.help-tip-card:nth-child(4n + 1) {
  border-top-color: var(--red);
}

.help-tip-card:nth-child(4n + 2) {
  border-top-color: var(--blue);
}

.help-tip-card:nth-child(4n + 3) {
  border-top-color: var(--green);
}

.help-tip-card:nth-child(4n + 4) {
  border-top-color: var(--ink);
}

.help-tip-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 950;
  line-height: 1.2;
}

.help-tip-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.help-cta {
  margin-top: 28px;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(18, 100, 255, 0.06), transparent 55%), var(--paper);
}

.help-cta p {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.4vw, 22px);
  font-weight: 950;
  line-height: 1.25;
}

.help-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.help-button-primary {
  border-color: transparent;
  background: var(--ink);
  color: #fff;
}

.help-button-primary:hover {
  background: #2a2a2a;
}

.help-button-secondary {
  border-color: var(--line);
  background: var(--surface);
  color: var(--ink);
}

.help-button-secondary:hover {
  border-color: rgba(18, 18, 18, 0.28);
}

@media (max-width: 1024px) {
  .help-hero-ink {
    opacity: 0.28;
    width: min(70vw, 420px);
    top: auto;
    bottom: -8%;
  }

  .help-hero-grid {
    grid-template-columns: 1fr;
    align-items: stretch;
  }

  .help-hero-aside {
    max-width: 520px;
  }

  .help-tool-grid,
  .help-draw-grid,
  .help-tips-grid {
    grid-template-columns: 1fr;
  }

  .help-draw-stack {
    height: auto;
    gap: 12px;
  }

  .help-draw-stack--left > .help-panel {
    flex: none;
  }

  .help-draw-stack--left > .help-panel .help-mini-table {
    flex: none;
    display: block;
  }

  .help-draw-stack--left > .help-panel .help-shortcut-row {
    flex: none;
    min-height: 0;
  }

  .help-draw-stack--right > .help-explain-card {
    margin-top: 0;
  }

  .help-shortcut-head,
  .help-shortcut-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .help-shortcut-head span:not(:first-child),
  .help-shortcut-row .help-shortcut-keys {
    padding-left: 0;
  }

  .help-mini-table .help-shortcut-row {
    grid-template-columns: 1fr;
  }

  .help-mini-table .help-shortcut-keys {
    justify-content: flex-start;
    text-align: left;
  }
}

@media (max-width: 760px) {
  .help-step {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .help-cta-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .help-cta-actions .button {
    width: 100%;
  }
}

@media (min-width: 1025px) and (max-width: 1180px) {
  .help-draw-grid .help-shortcut-row {
    padding: 12px 12px;
  }

  .help-draw-grid .help-shortcut-label {
    font-size: 13px;
  }
}