:root {
  --paper: #f3f4f6;
  --paper-soft: #f9fafb;
  --white: #ffffff;
  --ink: #111827;
  --muted: #6b7280;
  --line: #e5e7eb;
  --accent: #2563eb;
  --accent-deep: #1d4ed8;
  --dark: #111827;
  --shadow: 0 1px 3px rgba(17, 24, 39, 0.08);
  --shadow-lg: 0 12px 32px rgba(17, 24, 39, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
}

body.ao3-modal-open,
body.ao3-lightbox-open {
  overflow: hidden;
}

a {
  color: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font-family: inherit;
}

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

.ao3-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.ao3-skip {
  position: absolute;
  left: 12px;
  top: 12px;
  z-index: 300;
  padding: 8px 14px;
  border-radius: 4px;
  color: #ffffff;
  background: #111827;
  font-size: 13px;
  transform: translateY(-160%);
}

.ao3-skip:focus {
  transform: translateY(0);
}

.ao3-shell {
  width: min(100%, 1320px);
  min-height: 100vh;
  margin: 0 auto;
  background: var(--white);
  box-shadow: 0 2px 14px rgba(17, 24, 39, 0.05);
}

.ao3-statusbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 36px;
  padding: 0 24px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  background: var(--paper-soft);
  font-size: 12px;
  font-weight: 500;
}

.ao3-statusbar b {
  color: var(--ink);
  font-weight: 700;
}

.ao3-header {
  position: sticky;
  top: 0;
  z-index: 120;
  display: flex;
  align-items: center;
  gap: 22px;
  min-height: 72px;
  padding: 0 24px;
  border-bottom: 1px solid var(--line);
  background: var(--white);
}

.ao3-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  text-decoration: none;
}

.ao3-logo {
  width: 70px;
  height: 70px;
  flex: 0 0 70px;
  border: 1px solid #ff0000;
  border-radius: 8px;
  background: #ffffff;
  object-fit: cover;
}

.ao3-brand-copy {
  display: flex;
  flex-direction: column;
  min-width: 0;
  color: var(--ink);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.35;
}

.ao3-brand-copy small {
  color: var(--muted);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0;
}

.ao3-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-left: auto;
  font-size: 15px;
  font-weight: 500;
}

.ao3-nav a {
  color: var(--muted);
  text-decoration: none;
}

.ao3-nav a:hover,
.ao3-nav a:focus-visible {
  color: var(--accent);
}

.ao3-nav-actions {
  display: none;
}

.ao3-header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.ao3-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 16px;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  color: #374151;
  background: var(--white);
  box-shadow: none;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
}

.ao3-button svg {
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.ao3-button:hover,
.ao3-button:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

.ao3-button-solid {
  border-color: var(--dark);
  color: #ffffff;
  background: var(--dark);
}

.ao3-button-solid:hover,
.ao3-button-solid:focus-visible {
  border-color: #374151;
  color: #ffffff;
  background: #374151;
}

.ao3-menu {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  color: #374151;
  background: var(--white);
  text-decoration: none;
  cursor: pointer;
}

.ao3-menu svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
}

.ao3-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  min-height: 640px;
  background: var(--paper-soft);
}

.ao3-hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 64px clamp(28px, 6vw, 84px);
  border-right: 1px solid var(--line);
}

.ao3-eyebrow {
  display: inline-block;
  align-self: flex-start;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
}

.ao3-hero h1 {
  margin: 14px 0 16px;
  color: var(--ink);
  font-size: 52px;
  line-height: 1.15;
  font-weight: 700;
}

.ao3-hero h1 span {
  display: block;
  margin-top: 10px;
  color: #4b5563;
  font-size: 18px;
  font-weight: 500;
}

.ao3-lead {
  max-width: 560px;
  margin: 0;
  color: #4b5563;
  font-size: 16px;
}

.ao3-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.ao3-hero-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  max-width: 560px;
  margin: 38px 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.ao3-hero-meta div {
  min-width: 0;
}

.ao3-hero-meta dt {
  color: var(--muted);
  font-size: 12px;
}

.ao3-hero-meta dd {
  margin: 4px 0 0;
  color: var(--ink);
  font-size: 19px;
  font-weight: 700;
}

.ao3-hero-visual {
  position: relative;
  display: grid;
  place-items: center;
  padding: 48px 32px;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(37, 99, 235, 0.06), transparent 36%),
    var(--paper-soft);
}

.ao3-phone {
  position: relative;
  z-index: 2;
  width: min(330px, 76%);
  aspect-ratio: 9 / 18;
  border: 7px solid #111827;
  border-radius: 38px;
  background: var(--white);
  box-shadow: 0 28px 60px rgba(17, 24, 39, 0.22);
  overflow: hidden;
}

.ao3-phone-screen {
  position: relative;
  height: 100%;
  overflow: hidden;
  background: #ffffff;
}

.ao3-phone-screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ao3-phone-notch {
  position: absolute;
  top: 8px;
  left: 50%;
  z-index: 3;
  width: 92px;
  height: 22px;
  border-radius: 999px;
  background: #111827;
  transform: translateX(-50%);
}

.ao3-phone-home {
  position: absolute;
  bottom: 8px;
  left: 50%;
  z-index: 3;
  width: 90px;
  height: 4px;
  border-radius: 999px;
  background: rgba(17, 24, 39, 0.22);
  transform: translateX(-50%);
}

.ao3-float-card {
  position: absolute;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 164px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow-lg);
  font-size: 13px;
}

.ao3-float-card svg {
  width: 20px;
  height: 20px;
  flex: 0 0 20px;
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.ao3-float-card b {
  display: block;
  color: var(--ink);
  font-size: 13px;
  line-height: 1.4;
}

.ao3-float-card span {
  color: var(--muted);
  font-size: 11px;
}

.ao3-float-top {
  top: 16%;
  left: 4%;
}

.ao3-float-bottom {
  right: 4%;
  bottom: 14%;
}

.ao3-section {
  padding: 80px 28px;
}

.ao3-section-head {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 28px;
  align-items: end;
  margin-bottom: 34px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.ao3-section-head h2 {
  margin: 8px 0 0;
  color: var(--ink);
  font-size: 34px;
  line-height: 1.25;
}

.ao3-section-head p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.ao3-feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.ao3-feature {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.ao3-feature-icon {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--accent);
  background: var(--paper-soft);
}

.ao3-feature-icon svg {
  width: 21px;
  height: 21px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.ao3-feature h3 {
  margin: 16px 0 6px;
  color: var(--ink);
  font-size: 16px;
}

.ao3-feature p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.ao3-showcase {
  background: var(--paper-soft);
}

.ao3-showcase-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.ao3-product {
  min-width: 0;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--white);
  box-shadow: var(--shadow);
}

.ao3-product-media {
  aspect-ratio: 5 / 0;
  overflow: hidden;
  background: var(--paper-soft);
}

.ao3-product-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  cursor: zoom-in;
}

.ao3-product figcaption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  border-top: 1px solid var(--line);
  color: var(--ink);
  background: var(--white);
  font-size: 14px;
}

.ao3-product figcaption span {
  color: var(--muted);
  font-size: 12px;
}

.ao3-download {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper-soft);
}

.ao3-platform-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.ao3-platform {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.ao3-platform-icon {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--accent);
  background: var(--paper-soft);
}

.ao3-platform-icon svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.ao3-platform h3 {
  margin: 18px 0 4px;
  color: var(--ink);
  font-size: 18px;
}

.ao3-platform p {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 14px;
}

.ao3-platform-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  padding: 12px 0 16px;
  color: var(--muted);
  font-size: 13px;
}

.ao3-platform-meta span {
  padding: 3px 8px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--paper-soft);
}

.ao3-platform .ao3-button {
  width: 100%;
}

.ao3-help {
  background: var(--white);
}

.ao3-help-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 48px;
}

.ao3-help-intro h2 {
  margin: 8px 0 12px;
  color: var(--ink);
  font-size: 34px;
}

.ao3-help-intro p {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 15px;
}

.ao3-faq-list {
  border-top: 1px solid var(--line);
}

.ao3-faq {
  border-bottom: 1px solid var(--line);
}

.ao3-faq-toggle {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 18px 4px;
  border: 0;
  color: var(--ink);
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.ao3-faq-toggle span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}

.ao3-faq-toggle strong {
  font-size: 16px;
  font-weight: 600;
}

.ao3-faq-toggle svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 180ms ease;
}

.ao3-faq.ao3-open .ao3-faq-toggle svg {
  transform: rotate(180deg);
}

.ao3-faq-body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 220ms ease;
}

.ao3-faq-body > div {
  overflow: hidden;
}

.ao3-faq-body p {
  margin: 0 0 16px;
  padding-right: 34px;
  color: var(--muted);
  font-size: 14px;
}

.ao3-faq.ao3-open .ao3-faq-body {
  grid-template-rows: 1fr;
}

.ao3-reviews {
  border-top: 1px solid var(--line);
  background: var(--paper-soft);
}

.ao3-note-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.ao3-note {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.ao3-note-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font-size: 12px;
}

.ao3-note-head svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.ao3-note p {
  flex: 1;
  margin: 14px 0;
  color: #374151;
  font-size: 14px;
}

.ao3-note a {
  color: var(--accent);
  font-weight: 500;
  text-decoration: none;
}

.ao3-note a:hover {
  text-decoration: underline;
}

.ao3-note footer {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.ao3-avatar {
  display: grid;
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  place-items: center;
  border-radius: 999px;
  color: #374151;
  background: #e5e7eb;
  font-size: 13px;
  font-weight: 700;
}

.ao3-note footer div {
  min-width: 0;
}

.ao3-note footer b {
  display: block;
  color: var(--ink);
  font-size: 13px;
}

.ao3-note footer div span {
  color: var(--muted);
  font-size: 12px;
}

.ao3-footer {
  color: #ffffff;
  background: #111827;
}

.ao3-footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: 32px;
  max-width: 1264px;
  margin: 0 auto;
  padding: 48px 28px 32px;
}

.ao3-footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.ao3-footer-brand img {
  border-color: rgba(255, 255, 255, 0.45);
}

.ao3-footer-brand b {
  display: block;
  font-size: 16px;
}

.ao3-footer-brand span,
.ao3-footer p {
  color: rgba(255, 255, 255, 0.66);
  font-size: 13px;
}

.ao3-footer nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 16px;
  align-content: start;
}

.ao3-footer nav a {
  color: #d1d5db;
  font-size: 14px;
  text-decoration: none;
}

.ao3-footer nav a:hover {
  color: #ffffff;
  text-decoration: underline;
}

.ao3-footer-copy {
  color: rgba(255, 255, 255, 0.66);
  font-size: 13px;
}

.ao3-feedback {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 150;
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 42px;
  padding: 0 15px;
  border: 1px solid #111827;
  border-radius: 6px;
  color: #ffffff;
  background: #111827;
  box-shadow: 0 6px 18px rgba(17, 24, 39, 0.22);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
}

.ao3-feedback svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.ao3-feedback:hover {
  background: #374151;
}

.ao3-lightbox {
  position: fixed;
  inset: 0;
  z-index: 250;
  display: grid;
  place-items: center;
  padding: 24px;
  visibility: hidden;
  opacity: 0;
  transition: opacity 180ms ease, visibility 180ms ease;
}

.ao3-lightbox.ao3-open {
  visibility: visible;
  opacity: 1;
}

.ao3-lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(17, 24, 39, 0.84);
}

.ao3-lightbox-close {
  position: absolute;
  top: 18px;
  right: 18px;
  z-index: 2;
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.92);
  border-radius: 50%;
  color: #ffffff;
  background: rgba(17, 24, 39, 0.9);
  box-shadow: 0 2px 14px rgba(0, 0, 0, 0.35);
  cursor: pointer;
}

.ao3-lightbox-close svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
}

.ao3-lightbox-figure {
  position: relative;
  z-index: 1;
  max-width: min(92vw, 1100px);
  max-height: 86vh;
  margin: 0;
  text-align: center;
}

.ao3-lightbox-image {
  display: block;
  max-width: 100%;
  max-height: 82vh;
  margin: 0 auto;
  object-fit: contain;
  border-radius: 6px;
  background: #ffffff;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.28);
}

.ao3-lightbox-caption {
  margin-top: 12px;
  color: #ffffff;
  font-size: 15px;
}

.ao3-modal {
  position: fixed;
  inset: 0;
  z-index: 240;
  display: grid;
  place-items: center;
  padding: 20px;
  visibility: hidden;
  opacity: 0;
  transition: opacity 180ms ease, visibility 180ms ease;
}

.ao3-modal.ao3-open {
  visibility: visible;
  opacity: 1;
}

.ao3-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(17, 24, 39, 0.58);
}

.ao3-modal-panel {
  position: relative;
  z-index: 1;
  width: min(100%, 500px);
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow-lg);
}

.ao3-modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--muted);
  background: var(--white);
  cursor: pointer;
}

.ao3-modal-close svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
}

.ao3-modal-kicker {
  padding-right: 36px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.ao3-modal-panel h2 {
  margin: 8px 0 6px;
  padding-right: 36px;
  color: var(--ink);
  font-size: 24px;
}

.ao3-modal-panel > p {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 14px;
}

.ao3-download-choice {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.ao3-download-option {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 126px;
  padding: 16px 12px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  color: var(--ink);
  background: var(--white);
  text-decoration: none;
  cursor: pointer;
}

.ao3-download-option svg {
  width: 26px;
  height: 26px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.ao3-download-option:hover,
.ao3-download-option:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

.ao3-download-option b {
  font-size: 16px;
}

.ao3-download-option small {
  color: var(--muted);
  font-size: 13px;
}

.ao3-modal-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 20px;
}

.ao3-toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  z-index: 260;
  padding: 10px 18px;
  border-radius: 6px;
  color: #ffffff;
  background: #111827;
  box-shadow: 0 6px 18px rgba(17, 24, 39, 0.2);
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 14px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.ao3-toast.ao3-open {
  opacity: 1;
  transform: translate(-50%, 0);
}

@media (max-width: 1080px) {
  .ao3-feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .ao3-showcase-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .ao3-note-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .ao3-help-layout {
    gap: 32px;
  }
}

@media (max-width: 900px) {
  .ao3-header {
    overflow: visible;
  }

  .ao3-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 95;
    display: grid;
    width: 100%;
    margin: 0;
    padding: 10px 14px 14px;
    max-height: calc(100vh - 72px);
    overflow-y: auto;
    overscroll-behavior: contain;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    background: var(--white);
    box-shadow: 0 8px 24px rgba(17, 24, 39, 0.1);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 160ms ease, transform 160ms ease;
  }

  .ao3-nav.ao3-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .ao3-nav > a {
    display: flex;
    align-items: center;
    min-height: 46px;
    padding: 0 14px;
    border-bottom: 1px solid var(--line);
    border-radius: 6px;
    color: var(--ink);
    font-size: 15px;
    font-weight: 500;
  }

  .ao3-nav > a:last-of-type {
    border-bottom: 0;
  }

  .ao3-nav > a:hover,
  .ao3-nav > a:focus-visible {
    color: var(--accent);
    background: var(--paper-soft);
  }

  .ao3-nav-actions {
    display: grid;
    gap: 8px;
    padding: 14px 0 4px;
    border-top: 1px solid var(--line);
  }

  .ao3-nav-actions .ao3-button {
    width: 100%;
    min-height: 44px;
  }

  .ao3-header-actions {
    display: none;
  }

  .ao3-menu {
    display: inline-grid;
    place-items: center;
    margin-left: auto;
  }

  .ao3-hero {
    grid-template-columns: minmax(0, 1fr);
  }

  .ao3-hero-copy {
    border-right: 0;
  }

  .ao3-hero-visual {
    min-height: 560px;
    padding: 56px 24px;
    border-top: 1px solid var(--line);
  }

  .ao3-section-head {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .ao3-platform-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .ao3-help-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .ao3-footer-inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
}

@media (max-width: 600px) {
  body {
    font-size: 15px;
  }

  .ao3-statusbar {
    padding: 0 14px;
  }

  .ao3-header {
    min-height: 64px;
    padding: 0 14px;
  }

  .ao3-logo {
    width: 70px;
    height: 70px;
    flex-basis: 70px;
  }

  .ao3-brand-copy {
    font-size: 15px;
  }

  .ao3-brand-copy small {
    font-size: 9px;
  }

  .ao3-hero {
    min-height: 0;
  }

  .ao3-hero-copy {
    padding: 48px 18px 44px;
  }

  .ao3-hero h1 {
    font-size: 34px;
  }

  .ao3-hero h1 span {
    font-size: 16px;
  }

  .ao3-hero-meta {
    gap: 10px;
  }

  .ao3-hero-meta dd {
    font-size: 16px;
  }

  .ao3-hero-visual {
    min-height: 500px;
    padding: 44px 16px;
  }

  .ao3-phone {
    width: min(280px, 76%);
  }

  .ao3-float-card {
    min-width: 138px;
    padding: 8px 10px;
  }

  .ao3-float-top {
    left: 0;
  }

  .ao3-float-bottom {
    right: 0;
  }

  .ao3-section {
    padding: 56px 18px;
  }

  .ao3-section-head h2 {
    font-size: 28px;
  }

  .ao3-help-intro h2 {
    font-size: 28px;
  }

  .ao3-platform-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .ao3-product-media {
    aspect-ratio: 3 / 6;
  }

  .ao3-note-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .ao3-footer-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .ao3-footer nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .ao3-feedback {
    right: 14px;
    bottom: 14px;
  }

  .ao3-lightbox {
    padding: 14px;
  }

  .ao3-lightbox-close {
    top: 12px;
    right: 12px;
    width: 40px;
    height: 40px;
  }

  .ao3-lightbox-caption {
    font-size: 13px;
  }

  .ao3-download-choice {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 380px) {
  .ao3-brand-copy {
    font-size: 13px;
    line-height: 1.35;
  }

  .ao3-brand-copy small {
    font-size: 8px;
  }

  .ao3-hero h1 {
    font-size: 30px;
  }

  .ao3-feature-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}