:root {
  color-scheme: light;
  --bg: #fafafa;
  --surface: #ffffff;
  --surface-soft: #f4f4f4;
  --ink: #0a0a0a;
  --muted: #666666;
  --muted-2: #8b8b8b;
  --line: #d7d7d7;
  --line-soft: #eeeeee;
  --grid: #eeeeee;
  --accent: #d62828;
  --ok: #2d7a3e;
  --warn: #b86b17;
  --shadow: 0 22px 70px rgba(0, 0, 0, 0.08);
  --nav-height: 84px;
  --max: 1100px;
  --radius: 8px;
  --sans: "Helvetica Neue", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "SF Mono", "IBM Plex Mono", "Menlo", ui-monospace, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 24px);
}

html.site-menu-open {
  overflow: hidden;
}

body {
  margin: 0;
  background:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px),
    var(--bg);
  background-size: 40px 40px;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::selection {
  background: rgba(214, 40, 40, 0.16);
}

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

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

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

.app-shell {
  min-height: 100vh;
  overflow-x: clip;
}

.site-nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  min-height: var(--nav-height);
  padding: 0 max(20px, calc((100vw - var(--max)) / 2));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(10, 10, 10, 0.12);
  backdrop-filter: blur(10px);
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-lockup img,
.site-footer img {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  object-fit: cover;
  background: var(--ink);
}

.brand-lockup span,
.site-footer span {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.brand-lockup strong,
.site-footer strong {
  font-size: 16px;
  line-height: 1.05;
  font-weight: 800;
  color: var(--ink);
}

.brand-lockup small,
.site-footer small {
  font-size: 11px;
  line-height: 1.1;
  color: var(--muted);
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  flex: 1;
}

.nav-links button {
  min-height: 36px;
  padding: 0 12px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  transition: background 0.18s ease, color 0.18s ease;
}

.nav-links button:hover,
.nav-links button.is-active {
  background: rgba(10, 10, 10, 0.06);
}

.nav-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.ghost-link,
.primary-link,
.button,
.menu-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 38px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 800;
  line-height: 1;
  white-space: nowrap;
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.ghost-link {
  padding: 0 10px;
  border: 0;
  background: transparent;
}

.ghost-link:hover {
  background: rgba(10, 10, 10, 0.06);
}

.primary-link,
.button-primary {
  padding: 0 16px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: #ffffff;
}

.primary-link:hover,
.button-primary:hover {
  background: #232323;
}

.button-secondary,
.button-dark {
  padding: 0 16px;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
}

.button-secondary:hover,
.button-dark:hover {
  background: rgba(10, 10, 10, 0.06);
}

.button.compact {
  min-height: 38px;
  padding: 0 14px;
}

.menu-button {
  display: inline-flex;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--ink);
}

.menu-button:hover,
.menu-button.is-active {
  background: var(--ink);
  color: #ffffff;
}

.site-menu-shell {
  position: fixed;
  inset: 0;
  z-index: 90;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s ease;
}

.site-menu-shell.is-open {
  opacity: 1;
  pointer-events: auto;
}

.site-menu-scrim {
  position: absolute;
  inset: 0;
  border: 0;
  background: rgba(10, 10, 10, 0.38);
  backdrop-filter: blur(8px);
}

.site-drawer {
  position: absolute;
  inset: 0 0 0 auto;
  width: min(560px, calc(100vw - 70px));
  padding: 38px 34px;
  display: flex;
  flex-direction: column;
  background: #ffffff;
  box-shadow: -30px 0 80px rgba(0, 0, 0, 0.16);
  transform: translateX(100%);
  transition: transform 0.34s cubic-bezier(0.18, 0.86, 0.25, 1);
}

.site-menu-shell.is-open .site-drawer {
  transform: translateX(0);
}

.site-drawer-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 22px;
}

.drawer-brand {
  display: flex;
  align-items: center;
  gap: 18px;
}

.drawer-brand img {
  width: 64px;
  height: 64px;
  border-radius: 12px;
  object-fit: cover;
  background: var(--ink);
}

.drawer-brand span {
  display: grid;
  gap: 8px;
}

.drawer-brand strong {
  color: var(--ink);
  font-size: 28px;
  font-weight: 900;
  line-height: 1;
}

.drawer-brand small {
  color: var(--muted);
  font-size: 17px;
  font-weight: 650;
}

.drawer-close {
  width: 72px;
  height: 72px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 12px;
  background: var(--surface-soft);
  color: var(--ink);
}

.drawer-close:hover {
  background: var(--ink);
  color: #ffffff;
}

.drawer-kicker {
  margin: 68px 0 26px;
  color: #9a9a9a;
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.site-drawer-list {
  display: grid;
  gap: 12px;
}

.site-drawer-item {
  width: 100%;
  min-height: 92px;
  padding: 20px 24px;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) auto;
  align-items: center;
  gap: 18px;
  border: 0;
  border-radius: 12px;
  background: transparent;
  color: var(--ink);
  text-align: left;
  transition: background 0.18s ease, transform 0.18s ease;
}

.site-drawer-item:hover,
.site-drawer-item.is-highlight {
  background: var(--surface-soft);
}

.site-drawer-item:hover {
  transform: translateX(4px);
}

.drawer-item-icon {
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}

.site-drawer-item span:nth-child(2) {
  display: grid;
  gap: 6px;
}

.site-drawer-item strong {
  color: var(--ink);
  font-size: 24px;
  font-weight: 900;
  line-height: 1.1;
}

.site-drawer-item small {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.3;
}

.site-drawer-item > svg {
  color: #9a9a9a;
}

.drawer-bottom {
  margin-top: auto;
  padding-top: 28px;
  display: flex;
  gap: 12px;
}

.drawer-bottom a {
  min-height: 42px;
  padding: 0 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 850;
}

.drawer-bottom a:last-child {
  border-color: var(--ink);
  background: var(--ink);
  color: #ffffff;
}

.hero-section {
  position: relative;
  min-height: 100vh;
  padding: var(--nav-height) 20px 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-inner {
  width: min(880px, 100%);
  margin: 0 auto;
  padding: clamp(84px, 12vh, 150px) 0 clamp(44px, 7vh, 78px);
  text-align: center;
}

.hero-kicker,
.section-kicker {
  margin: 0 0 28px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  line-height: 1.6;
  text-transform: uppercase;
}

.hero-kicker span,
.section-kicker span,
.hero-data-head span span {
  color: var(--ink);
  margin-right: 8px;
}

.hero-title {
  margin: 0;
  color: var(--ink);
  font-size: clamp(54px, 8vw, 92px);
  font-weight: 900;
  letter-spacing: 0;
  line-height: 1.02;
  text-wrap: balance;
}

.hero-title span {
  display: block;
}

.hero-title .hero-accent {
  color: var(--accent);
}

.hero-subtitle,
.hero-typewriter {
  width: min(760px, 100%);
  margin: 28px auto 0;
  color: var(--muted);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.65;
}

.hero-typewriter {
  min-height: calc(1.65em);
  font-weight: 700;
}

.hero-typewriter .tw-txt {
  white-space: pre-wrap;
}

.hero-typewriter .tw-dot {
  display: inline-block;
  padding: 0 3px;
  color: var(--accent);
  font-weight: 900;
}

.hero-typewriter .tw-caret {
  display: inline-block;
  width: 0.56em;
  height: 1em;
  margin-left: 4px;
  vertical-align: -0.15em;
  background: var(--ink);
  animation: caret-blink 0.72s steps(2, start) infinite;
}

@keyframes caret-blink {
  0%, 48% { opacity: 1; }
  49%, 100% { opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-typewriter .tw-caret {
    display: none;
  }
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-top: 38px;
}

.hero-text-link {
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.hero-text-link:hover {
  color: var(--accent);
}

.hero-data {
  width: 100%;
  margin-top: auto;
  padding: 0 0 30px;
}

.hero-data-inner {
  width: min(var(--max), 100%);
  margin: 0 auto;
}

.hero-data-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.hero-data-head strong {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--ok);
  font-weight: 800;
}

.hero-data-head i {
  width: 6px;
  height: 6px;
  background: var(--ok);
  animation: blink 1.5s infinite;
}

@keyframes blink {
  0%, 48% { opacity: 1; }
  49%, 100% { opacity: 0.35; }
}

.hero-proof {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(16px, 4vw, 42px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.hero-proof li {
  min-height: 70px;
  padding: 8px 0 8px 14px;
  border-left: 2px solid var(--ink);
  text-align: left;
  font-family: var(--mono);
}

.hero-proof b,
.hero-proof span {
  display: block;
}

.hero-proof b {
  color: var(--ink);
  font-size: clamp(21px, 2.4vw, 28px);
  font-weight: 900;
  line-height: 1;
}

.hero-proof li.is-accent b {
  color: var(--accent);
}

.hero-proof span {
  margin-top: 10px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.05em;
}

.hero-live-line {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin: 18px 0 0;
  padding-top: 15px;
  border-top: 1px dashed var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.6;
}

.hero-live-line strong {
  color: var(--accent);
  letter-spacing: 0.14em;
}

.live-message {
  display: inline-block;
  animation: phrase-in 0.34s ease both;
}

.quick-buy {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto 44px;
  padding: 16px 18px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.05);
}

.quick-buy-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 850;
}

.quick-buy-head span,
.quick-buy-head a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.quick-buy-head a {
  color: var(--accent);
  font-size: 12px;
}

.quick-buy-row {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 10px;
}

.mini-product {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 70px;
  padding: 10px;
  border: 1px solid var(--line-soft);
  border-radius: 7px;
  background: #ffffff;
  min-width: 0;
  transition: transform 0.18s ease, border-color 0.18s ease;
}

.mini-product:hover {
  transform: translateY(-2px);
  border-color: var(--ink);
}

.mini-product img {
  width: 44px;
  height: 44px;
  border-radius: 6px;
  object-fit: cover;
  background: var(--surface-soft);
}

.mini-product span {
  min-width: 0;
}

.mini-product strong,
.mini-product small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mini-product strong {
  color: var(--ink);
  font-size: 13px;
  line-height: 1.25;
}

.mini-product small {
  margin-top: 5px;
  color: var(--muted);
  font-size: 12px;
}

.section {
  padding: clamp(78px, 10vh, 120px) max(20px, calc((100vw - var(--max)) / 2));
}

.standalone-page {
  min-height: calc(100vh - var(--nav-height));
  padding-top: calc(var(--nav-height) + 70px);
}

.section-white,
.section-flow {
  background:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px),
    var(--bg);
  background-size: 40px 40px;
}

.section-soft {
  background: var(--surface-soft);
}

.section-ink {
  background: var(--ink);
  color: #ffffff;
}

.section-head {
  width: min(760px, 100%);
  margin: 0 0 42px;
}

.section-head.with-actions {
  width: 100%;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.16em;
  line-height: 1.4;
  text-transform: uppercase;
}

.eyebrow.dark {
  color: var(--accent);
}

.eyebrow.light {
  color: #ff6b6b;
}

.section-head h2,
.feature-layout h2,
.support-card h2,
.detail-card h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(34px, 4vw, 52px);
  font-weight: 900;
  letter-spacing: 0;
  line-height: 1.12;
  text-wrap: balance;
}

.section-head p,
.feature-layout p,
.support-card p,
.detail-card p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

.section-head.inverted h2,
.section-head.inverted p {
  color: #ffffff;
}

.section-head.inverted p {
  color: rgba(255, 255, 255, 0.62);
}

.flow-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.flow-card {
  min-height: 330px;
  padding: 28px;
  background: rgba(255, 255, 255, 0.72);
  border-right: 1px solid var(--ink);
}

.flow-card:last-child {
  border-right: 0;
}

.flow-card-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 42px;
  font-family: var(--mono);
}

.flow-card-top span {
  color: var(--accent);
  font-size: 36px;
  font-weight: 900;
  line-height: 1;
}

.flow-card-top small {
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.flow-card h3 {
  margin: 0;
  color: var(--ink);
  font-size: 24px;
  line-height: 1.2;
}

.flow-card p {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.72;
}

.flow-card a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 28px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 900;
  text-decoration: underline;
  text-underline-offset: 5px;
}

.promise-grid,
.page-card-grid,
.detail-layout,
.support-layout {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.help-grid,
.tutorial-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.service-card,
.detail-card,
.support-card,
.info-card,
.tutorial-card,
.faq-list details,
.subpage-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.86);
}

.service-card,
.detail-card,
.support-card,
.info-card,
.tutorial-card {
  padding: 24px;
}

.service-card h3,
.detail-card h3,
.info-card h3,
.tutorial-card h3 {
  margin: 18px 0 0;
  color: var(--ink);
  font-size: 21px;
  line-height: 1.25;
}

.service-card p,
.detail-card p,
.info-card p,
.tutorial-card p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.info-card a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 22px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 900;
  text-decoration: underline;
  text-underline-offset: 5px;
}

.help-topic-grid {
  display: grid;
  gap: 18px;
  margin-top: 22px;
}

.help-topic {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.92);
}

.help-topic-head {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line-soft);
}

.help-topic-head > span {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 42px;
  font-weight: 900;
  line-height: 1;
}

.help-topic-head h3 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(24px, 2.6vw, 34px);
  font-weight: 900;
  line-height: 1.18;
}

.help-topic-head p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.72;
}

.qa-list {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}

.qa-list details {
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  background: #ffffff;
}

.qa-list summary {
  padding: 16px 18px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 900;
  list-style: none;
}

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

.qa-list details p {
  margin: 0;
  padding: 0 18px 18px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.quick-links-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.75fr) minmax(0, 1.25fr);
  gap: 22px;
  align-items: start;
  margin-top: 22px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.quick-links-panel h3,
.about-pain-panel h3 {
  margin: 0;
  color: var(--ink);
  font-size: 26px;
  font-weight: 900;
  line-height: 1.2;
}

.quick-links-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.quick-links-grid a,
.quick-links-grid span {
  min-height: 74px;
  padding: 14px;
  display: grid;
  align-content: center;
  gap: 7px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #ffffff;
}

.quick-links-grid a {
  position: relative;
  padding-right: 42px;
}

.quick-links-grid a > svg {
  position: absolute;
  top: 16px;
  right: 14px;
}

.quick-links-grid strong {
  color: var(--ink);
  font-size: 14px;
  font-weight: 900;
}

.quick-links-grid span span,
.quick-links-grid em,
.quick-links-grid a span {
  color: var(--muted);
  font-size: 13px;
  font-style: normal;
  line-height: 1.45;
}

.tutorial-card {
  min-height: 360px;
  display: grid;
  align-content: start;
}

.tutorial-card > span {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 42px;
  font-weight: 900;
  line-height: 1;
}

.tutorial-card > small {
  margin-top: 18px;
  color: var(--muted-2);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.tutorial-card ul {
  display: grid;
  gap: 9px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.tutorial-card li {
  position: relative;
  padding-left: 16px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.58;
}

.tutorial-card li::before {
  content: "";
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.about-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 28px;
  align-items: stretch;
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.9);
}

.about-copy {
  padding: 18px 10px 18px 0;
}

.about-copy h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(34px, 4vw, 52px);
  font-weight: 900;
  line-height: 1.12;
  text-wrap: balance;
}

.about-copy p {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
}

.about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.about-principles {
  display: grid;
  gap: 12px;
}

.principle-row {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.principle-row > svg {
  flex: 0 0 auto;
  margin-top: 3px;
  color: var(--accent);
}

.principle-row span {
  display: grid;
  gap: 8px;
}

.principle-row strong {
  color: var(--ink);
  font-size: 18px;
  font-weight: 900;
}

.principle-row small {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.about-pain-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
  gap: 24px;
  align-items: start;
  margin-top: 22px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.about-pain-panel ul {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.about-pain-panel li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  color: var(--ink);
  font-size: 15px;
  font-weight: 780;
  line-height: 1.62;
}

.about-pain-panel li svg {
  flex: 0 0 auto;
  margin-top: 3px;
  color: var(--accent);
}

.icon-bubble {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--ink);
  border-radius: 6px;
  background: var(--ink);
  color: #ffffff;
}

.category-tabs {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  padding: 2px 0 14px;
  scrollbar-width: none;
}

.category-tabs::-webkit-scrollbar {
  display: none;
}

.category-tabs button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #ffffff;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  white-space: nowrap;
}

.category-tabs button.is-active {
  border-color: var(--ink);
  background: var(--ink);
  color: #ffffff;
}

.category-tabs span {
  color: inherit;
  font-family: var(--mono);
  font-size: 11px;
}

.catalog-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin: 14px 0 18px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.88);
}

.catalog-summary strong {
  display: block;
  color: var(--ink);
  font-size: 22px;
  line-height: 1.15;
}

.catalog-summary p {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.summary-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.summary-tags span,
.feature-list span,
.landing-bullets span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 34px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #ffffff;
  color: var(--ink);
  font-size: 12px;
  font-weight: 800;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.product-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.product-card:hover {
  transform: translateY(-3px);
  border-color: var(--ink);
  box-shadow: var(--shadow);
}

.product-media {
  position: relative;
  display: block;
  aspect-ratio: 1.38;
  background: var(--surface-soft);
  overflow: hidden;
}

.product-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-media span {
  position: absolute;
  left: 10px;
  top: 10px;
  max-width: calc(100% - 20px);
  padding: 5px 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--ink);
  font-size: 11px;
  font-weight: 850;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.product-body {
  padding: 16px;
}

.product-card h3 {
  min-height: 45px;
  margin: 0;
  color: var(--ink);
  font-size: 15px;
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-meta,
.product-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.product-meta {
  margin-top: 14px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 12px;
}

.product-meta span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.low-stock {
  color: var(--warn);
}

.product-foot {
  margin-top: 18px;
}

.product-foot strong {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 22px;
  line-height: 1;
}

.product-foot a,
.detail-card a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 900;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.section-ink .button-dark {
  border-color: rgba(255, 255, 255, 0.42);
  color: #ffffff;
}

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

.release-card {
  min-height: 210px;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
}

.release-card span,
.release-card small {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: rgba(255, 255, 255, 0.54);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.release-card h3 {
  margin: 24px 0 0;
  color: #ffffff;
  font-size: 20px;
  line-height: 1.35;
}

.release-card p {
  margin: 12px 0 0;
  color: rgba(255, 255, 255, 0.64);
  font-size: 14px;
  line-height: 1.7;
}

.release-card small {
  margin-top: 22px;
}

.release-status {
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.5);
  font-family: var(--mono);
  font-size: 12px;
}

.review-section {
  overflow: hidden;
}

.review-marquee {
  position: relative;
  width: 100%;
  overflow: hidden;
  padding: 4px 0;
}

.review-marquee::before,
.review-marquee::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  z-index: 2;
  width: 42px;
  pointer-events: none;
}

.review-marquee::before {
  left: 0;
  background: linear-gradient(90deg, var(--ink), transparent);
}

.review-marquee::after {
  right: 0;
  background: linear-gradient(270deg, var(--ink), transparent);
}

.review-track {
  display: flex;
  gap: 14px;
  width: max-content;
  animation: review-marquee 36s linear infinite;
}

.review-marquee:hover .review-track {
  animation-play-state: paused;
}

.review-card {
  width: min(380px, 78vw);
  min-height: 220px;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
}

.review-rating {
  display: flex;
  gap: 5px;
  color: #ffcc4d;
}

.review-card p {
  margin: 22px 0 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 16px;
  line-height: 1.72;
}

.review-user {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px dashed rgba(255, 255, 255, 0.18);
}

.review-user strong {
  color: #ffffff;
  font-size: 15px;
}

.review-user span {
  color: rgba(255, 255, 255, 0.5);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-align: right;
}

.review-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.review-strip span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 34px;
  padding: 0 11px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 6px;
  color: rgba(255, 255, 255, 0.84);
  font-size: 12px;
  font-weight: 850;
}

@keyframes review-marquee {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(calc(-50% - 7px));
  }
}

.support-layout {
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
}

.support-card h2 {
  font-size: clamp(30px, 3.4vw, 44px);
}

.support-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.support-wechat {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #ffffff;
  color: var(--accent);
  font-size: 13px;
  font-weight: 900;
}

.wechat-qr-card {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  width: min(100%, 440px);
  margin-top: 18px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
}

.wechat-qr-card img {
  width: 150px;
  height: 150px;
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  object-fit: contain;
  background: #ffffff;
}

.wechat-qr-card span {
  display: grid;
  gap: 8px;
}

.wechat-qr-card strong {
  color: var(--ink);
  font-size: 15px;
  font-weight: 900;
  line-height: 1.3;
}

.wechat-qr-card small {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.wechat-qr-card.is-compact {
  margin-top: 18px;
}

.faq-list {
  display: grid;
  gap: 10px;
}

.faq-list details {
  padding: 0;
}

.faq-list summary {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 18px;
  color: var(--ink);
  font-weight: 850;
  list-style: none;
}

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

.faq-list details p {
  margin: 0;
  padding: 0 18px 18px 44px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.72;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px max(20px, calc((100vw - var(--max)) / 2));
  border-top: 1px solid var(--line);
  background: #ffffff;
}

.site-footer > div {
  display: flex;
  align-items: center;
  gap: 12px;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 16px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 750;
}

.mobile-dock {
  display: none;
}

.landing-hero {
  min-height: calc(100vh - var(--nav-height));
  padding: calc(var(--nav-height) + 60px) max(20px, calc((100vw - var(--max)) / 2)) 70px;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.75fr);
  align-items: center;
  gap: 42px;
  background: var(--ink);
  color: #ffffff;
}

.landing-copy h1 {
  margin: 0;
  color: #ffffff;
  font-size: clamp(44px, 5vw, 70px);
  line-height: 1.04;
  letter-spacing: 0;
}

.landing-copy > p {
  margin: 20px 0 0;
  color: rgba(255, 255, 255, 0.68);
  font-size: 17px;
  line-height: 1.75;
}

.back-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  margin-bottom: 34px;
  border: 0;
  background: transparent;
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
  font-weight: 800;
}

.back-button.dark {
  color: var(--ink);
}

.back-button.dark:hover {
  color: var(--accent);
}

.landing-actions,
.landing-bullets {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.landing-hero .button-primary {
  border-color: #ffffff;
  background: #ffffff;
  color: var(--ink);
}

.landing-hero .button-dark {
  border-color: rgba(255, 255, 255, 0.34);
  color: #ffffff;
}

.landing-bullets span {
  border-color: rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.06);
  color: #ffffff;
}

.landing-media {
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
}

.landing-media img {
  width: 100%;
  height: 100%;
  min-height: 360px;
  object-fit: cover;
}

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

.subpage-card {
  overflow: hidden;
}

.subpage-card img {
  width: 100%;
  aspect-ratio: 1.8;
  object-fit: cover;
}

.subpage-card div {
  padding: 20px;
}

.subpage-card span {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.subpage-card h3 {
  margin: 12px 0 0;
  color: var(--ink);
  font-size: 20px;
  line-height: 1.35;
}

.subpage-card p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.subpage-card button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-size: 13px;
  font-weight: 900;
  text-decoration: underline;
  text-underline-offset: 4px;
}

@media (max-width: 1120px) {
  .site-nav {
    padding: 0 20px;
  }

  .quick-buy-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (max-width: 860px) {
  :root {
    --nav-height: 72px;
  }

  .desktop-only {
    display: none;
  }

  .site-nav {
    min-height: var(--nav-height);
  }

  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    display: none;
    padding: 12px 20px 18px;
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.98);
  }

  .nav-links.is-open {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .nav-links button {
    border: 1px solid var(--line-soft);
    background: #ffffff;
  }

  .menu-button {
    display: inline-flex;
    border: 1px solid var(--line);
  }

  .primary-link {
    width: 38px;
    padding: 0;
    font-size: 0;
  }

  .primary-link svg {
    width: 18px;
    height: 18px;
  }

  .hero-section {
    min-height: 100svh;
    padding-left: 20px;
    padding-right: 20px;
  }

  .hero-inner {
    padding-top: clamp(74px, 10vh, 112px);
    padding-bottom: 46px;
  }

  .hero-title {
    font-size: clamp(42px, 12vw, 58px);
  }

  .hero-subtitle,
  .hero-typewriter {
    font-size: 15px;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .button,
  .hero-text-link {
    width: 100%;
    min-height: 52px;
  }

  .hero-text-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .hero-proof {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  .hero-data {
    padding-bottom: 96px;
  }

  .hero-live-line {
    align-items: flex-start;
    justify-content: flex-start;
    text-align: left;
  }

  .quick-buy {
    width: calc(100% - 24px);
    margin-bottom: 22px;
  }

  .quick-buy-row {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 68px 20px;
  }

  .section-head.with-actions,
  .catalog-summary,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .flow-grid,
  .promise-grid,
  .release-grid,
  .support-layout,
  .detail-layout,
  .landing-hero,
  .help-grid,
  .tutorial-grid,
  .help-topic-head,
  .quick-links-panel,
  .about-pain-panel,
  .about-panel,
  .page-card-grid {
    grid-template-columns: 1fr;
  }

  .quick-links-grid {
    grid-template-columns: 1fr;
  }

  .about-panel {
    padding: 24px;
  }

  .about-copy {
    padding: 0;
  }

  .flow-grid {
    border: 1px solid var(--ink);
  }

  .flow-card {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--ink);
  }

  .flow-card:last-child {
    border-bottom: 0;
  }

  .flow-card-top {
    margin-bottom: 34px;
  }

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

  .summary-tags {
    justify-content: flex-start;
  }

  .landing-hero {
    padding: calc(var(--nav-height) + 46px) 20px 54px;
  }

  .landing-media img {
    min-height: 260px;
  }

  .mobile-dock {
    position: fixed;
    left: 14px;
    right: 14px;
    bottom: 14px;
    z-index: 45;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    padding: 8px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
  }

  .mobile-dock a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 46px;
    border-radius: 6px;
    background: var(--ink);
    color: #ffffff;
    font-size: 13px;
    font-weight: 850;
  }

  .site-footer {
    padding-bottom: 96px;
  }
}

@media (max-width: 560px) {
  .site-nav {
    gap: 10px;
  }

  .site-drawer {
    width: calc(100vw - 32px);
    padding: 28px 22px;
  }

  .drawer-brand img {
    width: 56px;
    height: 56px;
  }

  .drawer-brand strong {
    font-size: 24px;
  }

  .drawer-brand small,
  .site-drawer-item small {
    font-size: 15px;
  }

  .drawer-close {
    width: 56px;
    height: 56px;
  }

  .drawer-kicker {
    margin-top: 56px;
  }

  .site-drawer-item {
    min-height: 86px;
    padding: 18px 16px;
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .drawer-item-icon {
    display: none;
  }

  .site-drawer-item strong {
    font-size: 22px;
  }

  .wechat-qr-card {
    grid-template-columns: 118px minmax(0, 1fr);
  }

  .wechat-qr-card img {
    width: 118px;
    height: 118px;
  }

  .brand-lockup strong {
    font-size: 15px;
  }

  .brand-lockup small {
    display: none;
  }

  .nav-links.is-open {
    grid-template-columns: 1fr 1fr;
  }

  .hero-kicker {
    margin-bottom: 22px;
    font-size: 10px;
    letter-spacing: 0.11em;
  }

  .hero-title {
    font-size: clamp(39px, 12.5vw, 52px);
    line-height: 1.08;
  }

  .hero-subtitle,
  .hero-typewriter {
    margin-top: 20px;
    line-height: 1.7;
  }

  .hero-data {
    padding-bottom: 100px;
  }

  .hero-proof b {
    font-size: 22px;
  }

  .hero-proof span {
    font-size: 10px;
  }

  .section-head h2,
  .feature-layout h2,
  .support-card h2,
  .detail-card h2 {
    font-size: 32px;
  }

  .flow-card {
    padding: 22px;
  }

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

  .product-media {
    aspect-ratio: 1.65;
  }

  .release-card,
  .service-card,
  .detail-card,
  .support-card {
    padding: 20px;
  }
}