:root {
  --bg: #fbfbfd;
  --panel: rgba(255, 255, 255, 0.76);
  --text: #111827;
  --muted: #687083;
  --subtle: #8b93a5;
  --line: rgba(17, 24, 39, 0.09);
  --line-strong: rgba(17, 24, 39, 0.14);
  --accent: #2563eb;
  --accent-soft: rgba(37, 99, 235, 0.09);
  --radius: 28px;
  --shadow: 0 28px 80px rgba(15, 23, 42, 0.12), 0 8px 24px rgba(15, 23, 42, 0.06);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans CJK JP", sans-serif;
  background: radial-gradient(circle at 50% 0%, #fff 0, #f7f9fc 42%, #fbfbfd 100%);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
.page { min-height: 100vh; overflow: hidden; }
.wrap { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.nav {
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 650;
  letter-spacing: -0.03em;
  white-space: nowrap;
}
.brand img { width: 32px; height: 32px; display: block; }
.nav-right { display: flex; align-items: center; gap: 12px; }
.nav-links { display: flex; align-items: center; gap: 18px; color: var(--muted); font-size: 14px; }
.nav-links > a:not(.pill),
.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  transition: color 0.18s ease;
}
.nav-links > a:not(.pill):hover,
.nav-link:hover { color: var(--text); }
.nav-link--section,
.nav-link--utility,
.nav-link--guides {
  color: var(--muted);
  font-weight: 600;
}
.nav-link--support,
.support-nav-link {
  color: var(--muted);
  font-weight: 650;
}
.nav-link--support:hover,
.support-nav-link:hover { color: var(--text); }
.locale-prompt {
  margin-top: 2px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.locale-prompt.is-visible { display: flex; }
.locale-prompt-copy {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.locale-prompt-eyebrow {
  margin: 0;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--subtle);
}
.locale-prompt-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.45;
  color: var(--muted);
}
.locale-prompt-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  flex-shrink: 0;
}
.locale-prompt-link,
.locale-prompt-dismiss {
  font: inherit;
  cursor: pointer;
}
.locale-prompt-link {
  border-color: rgba(17, 24, 39, 0.08);
  background: var(--text);
  color: #fff;
}
.locale-prompt-link:hover {
  color: #fff;
  background: #0f172a;
}
.locale-prompt-link span {
  font-weight: 700;
}
.locale-prompt-dismiss {
  background: rgba(255, 255, 255, 0.72);
  color: var(--muted);
}
.locale-prompt-dismiss:hover {
  color: var(--text);
  border-color: var(--line-strong);
}
.privacy-page,
.terms-page { overflow: visible; }
.privacy-nav-links,
.terms-nav-links { justify-content: flex-end; flex-wrap: wrap; }
.privacy-main,
.terms-main {
  width: min(780px, calc(100% - 40px));
  padding: 30px 0 84px;
}
.privacy-prose,
.terms-prose {
  color: var(--text);
  font-size: 17px;
  line-height: 1.72;
  letter-spacing: -0.01em;
}
.privacy-prose h1,
.terms-prose h1 {
  margin: 16px 0 8px;
  font-size: clamp(34px, 4.8vw, 56px);
  line-height: 1.02;
  letter-spacing: -0.06em;
}
.privacy-prose h2,
.terms-prose h2 {
  margin: 34px 0 12px;
  font-size: clamp(22px, 2.8vw, 30px);
  line-height: 1.12;
  letter-spacing: -0.04em;
}
.privacy-prose h3,
.terms-prose h3 {
  margin: 22px 0 10px;
  font-size: 18px;
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.privacy-prose p,
.privacy-prose li,
.terms-prose p,
.terms-prose li {
  color: var(--muted);
}
.privacy-prose p,
.terms-prose p { margin: 12px 0 0; }
.privacy-prose h1 + p,
.terms-prose h1 + p {
  margin-top: 10px;
  color: var(--subtle);
  font-size: 14px;
}
.privacy-prose ul,
.privacy-prose ol,
.terms-prose ul,
.terms-prose ol {
  margin: 14px 0 0;
  padding-left: 1.15em;
}
.privacy-prose li + li,
.terms-prose li + li { margin-top: 8px; }
.privacy-prose a,
.terms-prose a {
  color: #1d4ed8;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.privacy-prose hr,
.terms-prose hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 26px 0;
}
.privacy-prose code,
.terms-prose code {
  font-family: ui-monospace, SFMono-Regular, SF Mono, Menlo, Monaco, Consolas, monospace;
  font-size: 0.95em;
}
.privacy-prose strong,
.terms-prose strong { color: var(--text); }
.privacy-footer,
.terms-footer { padding-top: 12px; }
.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.66);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  border-radius: 999px;
  padding: 9px 13px;
  color: var(--muted);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.8) inset;
}

.language-menu { position: relative; }
.language-menu summary {
  list-style: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 38px;
  padding: 0 11px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.68);
  color: var(--muted);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.8) inset;
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  font-size: 13px;
  font-weight: 650;
  transition: border-color 0.18s ease, background 0.18s ease, color 0.18s ease;
}
.language-menu summary::-webkit-details-marker { display: none; }
.language-menu[open] summary {
  border-color: rgba(37, 99, 235, 0.24);
  background: rgba(37, 99, 235, 0.08);
  color: var(--text);
}
.globe { width: 18px; height: 18px; fill: currentColor; color: #2563eb; }
.language-panel {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: 210px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 20px 60px rgba(15, 23, 42, 0.14), 0 4px 18px rgba(15, 23, 42, 0.08);
  -webkit-backdrop-filter: blur(22px);
  backdrop-filter: blur(22px);
  max-height: min(60vh, 420px);
  overflow: auto;
  z-index: 10;
}
.language-option {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 12px;
  padding: 10px 11px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  color: var(--text);
  transition: background 0.18s ease, color 0.18s ease;
}
.language-option small {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-left: auto;
  color: var(--subtle);
  font-size: 13px;
  font-weight: 600;
}
.language-option:hover,
.language-option.is-current {
  background: rgba(37, 99, 235, 0.08);
  color: #1d4ed8;
}
.language-option.is-current small { color: var(--accent); }
.current-dot {
  display: none;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}
.language-option.is-current .current-dot { display: inline-block; }

.hero { padding: 68px 0 34px; text-align: center; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: #4b5563;
  font-size: 14px;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.9) inset;
}
.dot { width: 7px; height: 7px; border-radius: 999px; background: #22c55e; box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.12); }
h1 {
  margin: 24px auto 0;
  max-width: 980px;
  font-size: clamp(44px, 7.2vw, 86px);
  line-height: 0.99;
  letter-spacing: -0.075em;
  font-weight: 760;
}
html[lang="zh-CN"] h1,
html[lang="ja"] h1,
html[lang="fr"] h1 { letter-spacing: -0.055em; }
.lead {
  margin: 26px auto 0;
  max-width: 800px;
  font-size: clamp(19px, 2.2vw, 25px);
  line-height: 1.42;
  color: var(--muted);
  letter-spacing: -0.025em;
}
.actions { margin-top: 34px; display: flex; align-items: center; justify-content: center; gap: 12px; flex-wrap: wrap; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  font-weight: 600;
  font-size: 15px;
  background: #111827;
  color: #fff;
  box-shadow: 0 10px 28px rgba(17, 24, 39, 0.16);
}
.button.secondary { background: rgba(255, 255, 255, 0.72); color: #1f2937; box-shadow: none; }

.preview { padding: 42px 0 52px; }
.device {
  position: relative;
  border: 1px solid rgba(17, 24, 39, 0.12);
  border-radius: 30px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.78), rgba(255, 255, 255, 0.62));
  box-shadow: var(--shadow);
  padding: 10px;
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
}
.device::before {
  content: "";
  position: absolute;
  inset: -90px -70px auto auto;
  width: 360px;
  height: 260px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.14), transparent 68%);
  z-index: -1;
}
.device img { display: block; width: 100%; height: auto; border-radius: 22px; }
.caption { margin: 16px auto 0; text-align: center; color: var(--subtle); font-size: 13px; }

.section { padding: 56px 0; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  padding: 28px;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.8) inset;
}
.card h2 { margin: 0; font-size: clamp(26px, 3vw, 34px); line-height: 1.08; letter-spacing: -0.045em; }
.card p { margin: 14px 0 0; color: var(--muted); font-size: 17px; line-height: 1.55; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; margin-top: 18px; }
.feature { border: 1px solid var(--line); border-radius: 22px; background: rgba(255, 255, 255, 0.58); padding: 22px; min-height: 180px; }
.icon { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 12px; background: var(--accent-soft); color: var(--accent); font-weight: 700; margin-bottom: 18px; }
.feature h3 { margin: 0; font-size: 18px; letter-spacing: -0.02em; }
.feature p { margin: 10px 0 0; color: var(--muted); line-height: 1.55; font-size: 15px; }

.section-head { max-width: 760px; margin: 0 auto 26px; text-align: center; }
.section-eyebrow { margin: 0 0 10px; color: var(--accent); font-size: 13px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; }
.section-head h2 { margin: 0; font-size: clamp(32px, 5vw, 56px); line-height: 1.05; letter-spacing: -0.06em; }
.section-head p:not(.section-eyebrow) { margin: 16px auto 0; max-width: 700px; color: var(--muted); font-size: 18px; line-height: 1.55; }
.map-gallery { padding: 54px 0 72px; }
.map-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.map-card { border: 1px solid var(--line); border-radius: 26px; background: rgba(255, 255, 255, 0.68); box-shadow: 0 1px 0 rgba(255, 255, 255, 0.9) inset; overflow: hidden; }
.map-frame { aspect-ratio: 4 / 3; background: linear-gradient(180deg, rgba(248, 250, 252, 0.9), rgba(255, 255, 255, 0.68)); display: flex; align-items: center; justify-content: center; padding: 10px; border-bottom: 1px solid var(--line); }
.map-frame picture { display: block; width: 100%; height: 100%; }
.map-frame img { width: 100%; height: 100%; object-fit: contain; display: block; border-radius: 16px; }
.map-copy { padding: 18px 18px 20px; }
.map-copy span { display: inline-flex; margin-bottom: 10px; color: var(--subtle); font-size: 12px; font-weight: 650; letter-spacing: 0.04em; text-transform: uppercase; }
.map-copy h3 { margin: 0; font-size: 18px; letter-spacing: -0.025em; }
.map-copy p { margin: 8px 0 0; color: var(--muted); font-size: 14px; line-height: 1.5; }

.current-work-hub { padding: 16px 0 78px; }
.hub-preview { margin-top: 30px; }
.hub-device {
  position: relative;
  border: 1px solid rgba(17, 24, 39, 0.12);
  border-radius: 30px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.78), rgba(255, 255, 255, 0.62));
  box-shadow: var(--shadow);
  padding: 10px;
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
}
.hub-device::before {
  content: "";
  position: absolute;
  inset: auto auto -100px -70px;
  width: 360px;
  height: 240px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.12), transparent 68%);
  z-index: -1;
}
.hub-device img { display: block; width: 100%; height: auto; border-radius: 22px; }
.hub-points { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 18px; }
.hub-point {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.62);
  padding: 20px;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.82) inset;
}
.hub-point span {
  display: block;
  width: 22px;
  height: 3px;
  border-radius: 999px;
  background: var(--accent);
  margin-bottom: 18px;
}
.hub-point h3 { margin: 0; font-size: 18px; letter-spacing: -0.02em; }
.hub-point p { margin: 10px 0 0; color: var(--muted); line-height: 1.55; font-size: 15px; }

.quote { padding: 70px 0 88px; text-align: center; }
.quote h2 { margin: 0 auto; max-width: 860px; font-size: clamp(34px, 5vw, 58px); line-height: 1.05; letter-spacing: -0.06em; }
.quote p { margin: 22px auto 0; max-width: 650px; color: var(--muted); font-size: 19px; line-height: 1.5; }
.closing-showcase { margin-top: 34px; text-align: left; }
.closing-showcase-device { margin-top: 0; }
.closing-showcase-device + .closing-showcase-device { margin-top: 18px; }
.closing-showcase-points {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
  margin-top: 16px;
}
.closing-point {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.62);
  padding: 20px;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.82) inset;
}
.closing-point h3 { margin: 0; font-size: 18px; line-height: 1.15; letter-spacing: -0.02em; }
.closing-point p { margin: 10px 0 0; color: var(--muted); font-size: 15px; line-height: 1.55; }
.footer { border-top: 1px solid var(--line); padding: 28px 0 42px; color: var(--subtle); font-size: 14px; }
.footer-main {
  width: 100%;
  gap: 16px;
}
.footer-inner--standard {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.footer-inner--standard .footer-main {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}
.footer-inner--standard .footer-links {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-inner--beian {
  display: grid;
  grid-template-columns: 1fr;
  justify-items: center;
  gap: 12px;
}
.footer-inner--beian .footer-main {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 16px;
}
.footer-inner--beian .footer-main > span:first-child { min-width: 0; }
.footer-inner--beian .footer-links {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-beian {
  font-size: 13px;
  line-height: 1.5;
  text-align: center;
  justify-self: center;
  white-space: nowrap;
}
.footer-beian a {
  color: var(--subtle);
  transition: color 0.18s ease;
}
.footer-beian a:hover { color: var(--text); }

.support-page { overflow: visible; }
.support-nav-links { justify-content: flex-end; flex-wrap: wrap; }
.support-nav-cta { color: var(--muted); }
.support-hero { padding-bottom: 42px; }
.support-hero h1 { max-width: 900px; }
.support-hero .lead { max-width: 780px; }
.support-section { padding: 34px 0; }
.support-topic-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.support-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  padding: 28px;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.82) inset;
}
.support-card h2 {
  margin: 0;
  font-size: clamp(25px, 3vw, 34px);
  line-height: 1.12;
  letter-spacing: -0.045em;
}
.support-topic h2 { font-size: 20px; letter-spacing: -0.025em; }
.support-card p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.58;
}
.support-card .section-eyebrow,
.support-email-panel .section-eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
}
.support-box {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(280px, 0.92fr);
  gap: 18px;
  align-items: stretch;
}
.support-email-panel {
  border: 1px solid rgba(37, 99, 235, 0.16);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 100% 0%, rgba(37, 99, 235, 0.12), transparent 55%),
    rgba(255, 255, 255, 0.62);
  padding: 28px;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.85) inset;
}
.support-email-panel p:not(.section-eyebrow) {
  margin: 0;
  color: var(--muted);
  line-height: 1.58;
}
.support-email {
  display: inline-flex;
  margin-top: 16px;
  color: var(--accent);
  font-weight: 700;
  word-break: break-word;
}
.support-list {
  margin: 18px 0 0;
  padding-left: 1.15em;
  color: var(--muted);
  line-height: 1.68;
}
.support-list li + li { margin-top: 8px; }
.support-faq details {
  border-top: 1px solid var(--line);
  padding: 18px 0;
}
.support-faq details:first-of-type { margin-top: 18px; }
.support-faq details:last-child {
  border-bottom: 1px solid var(--line);
  padding-bottom: 18px;
}
.support-faq summary {
  cursor: pointer;
  color: var(--text);
  font-weight: 700;
  letter-spacing: -0.015em;
}
.support-faq summary::marker { color: var(--accent); }
.support-faq details p {
  max-width: 820px;
  margin-top: 10px;
}
.support-privacy { padding-bottom: 84px; }
.support-footer { padding-top: 28px; }

.guides-page { overflow: visible; }
.guides-nav-links { justify-content: flex-end; flex-wrap: wrap; }
.guides-hero {
  padding: 42px 0 20px;
}
.guides-hero .lead {
  margin-left: 0;
  margin-right: 0;
  max-width: 760px;
  text-align: left;
}
.guides-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  padding-bottom: 84px;
}
.guides-card,
.guides-empty,
.guides-article {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.82) inset;
}
.guides-card,
.guides-empty {
  padding: 28px;
}
.guides-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
}
.guides-card h2 {
  margin: 14px 0 0;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.12;
  letter-spacing: -0.045em;
}
.guides-card h2 a {
  transition: color 0.18s ease;
}
.guides-card h2 a:hover {
  color: var(--accent);
}
.guides-card p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.65;
}
.guides-card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  color: var(--subtle);
  font-size: 13px;
  line-height: 1.4;
}
.guides-card-footer {
  margin-top: auto;
  padding-top: 18px;
}
.guides-read-more {
  display: inline-flex;
}
.guides-empty {
  grid-column: 1 / -1;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
}
.guides-post {
  width: min(820px, calc(100% - 40px));
  padding: 24px 0 88px;
}
.guides-back {
  display: inline-flex;
  margin-bottom: 18px;
}
.guides-article {
  padding: 30px;
}
.guides-article h1 {
  margin: 16px 0 0;
  max-width: none;
  text-align: left;
  font-size: clamp(40px, 5vw, 62px);
  line-height: 1.03;
  letter-spacing: -0.06em;
}
.guides-summary {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.6;
  max-width: 720px;
}
.guides-tags {
  display: inline-flex;
  gap: 8px;
  flex-wrap: wrap;
}
.tag {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: #1d4ed8;
  font-size: 12px;
  font-weight: 650;
}
.guides-prose {
  margin-top: 28px;
  color: var(--text);
  font-size: 17px;
  line-height: 1.78;
  letter-spacing: -0.01em;
}
.guides-prose > :first-child {
  margin-top: 0;
}
.guides-prose h2 {
  margin: 34px 0 12px;
  font-size: clamp(24px, 3vw, 32px);
  line-height: 1.12;
  letter-spacing: -0.045em;
}
.guides-prose h3 {
  margin: 24px 0 10px;
  font-size: 18px;
  line-height: 1.2;
  letter-spacing: -0.025em;
}
.guides-prose p,
.guides-prose li {
  color: var(--muted);
}
.guides-prose p {
  margin: 12px 0 0;
}
.guides-prose ul,
.guides-prose ol {
  margin: 14px 0 0;
  padding-left: 1.15em;
}
.guides-prose li + li {
  margin-top: 8px;
}
.guides-prose a {
  color: #1d4ed8;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.guides-prose strong {
  color: var(--text);
}
.guides-prose hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 26px 0;
}
.guides-prose blockquote {
  margin: 18px 0 0;
  padding: 0 0 0 16px;
  border-left: 3px solid rgba(37, 99, 235, 0.22);
}
.guides-prose blockquote p {
  margin-top: 0;
}
.guides-prose code {
  font-family: ui-monospace, SFMono-Regular, SF Mono, Menlo, Monaco, Consolas, monospace;
  font-size: 0.94em;
  background: rgba(17, 24, 39, 0.06);
  padding: 0.15em 0.38em;
  border-radius: 8px;
}
.guides-prose pre {
  margin: 18px 0 0;
  padding: 16px 18px;
  overflow: auto;
  border-radius: 18px;
  background: #0f172a;
  color: #e5e7eb;
}
.guides-prose pre code {
  display: block;
  padding: 0;
  background: transparent;
  color: inherit;
}
.guides-prose img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 18px 0 0;
  border-radius: 18px;
  border: 1px solid var(--line);
}
.guides-prose .guides-video {
  margin: 20px 0 0;
  padding: 0;
}
.guides-prose .guides-video video {
  display: block;
  width: 100%;
  height: auto;
}

@media (max-width: 820px) {
  .wrap { width: min(100% - 28px, 1120px); }
  .nav { height: 68px; }
  .nav-links .nav-link--section { display: none; }
  .pill { display: none; }
  .locale-prompt .pill { display: inline-flex; }
  .hero { padding-top: 44px; }
  h1 { font-size: 46px; letter-spacing: -0.06em; }
  .lead { font-size: 18px; }
  .split, .features, .map-grid, .hub-points { grid-template-columns: 1fr; }
  .card { padding: 24px; }
  .preview { padding-top: 30px; }
  .device { border-radius: 24px; padding: 7px; }
  .device img { border-radius: 18px; }
  .map-frame { aspect-ratio: 16 / 10; }
  .current-work-hub { padding-bottom: 60px; }
  .closing-showcase { margin-top: 28px; }
  .hub-device { border-radius: 24px; padding: 7px; }
  .hub-device img { border-radius: 18px; }
  .quote { padding: 54px 0 66px; }
  .footer .wrap { display: block; }
  .footer a,
  .footer-links { display: inline-flex; margin-top: 10px; }
  .site-nav,
  .support-nav,
  .privacy-nav,
  .terms-nav,
  .guides-nav {
    height: auto;
    min-height: 68px;
    align-items: flex-start;
    padding-top: 18px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "brand lang"
      "links links";
    gap: 10px 12px;
  }
  .site-nav .brand,
  .support-nav .brand,
  .privacy-nav .brand,
  .terms-nav .brand,
  .guides-nav .brand { grid-area: brand; }
  .site-nav .nav-right,
  .support-nav .nav-right,
  .privacy-nav .nav-right,
  .terms-nav .nav-right,
  .guides-nav .nav-right { display: contents; }
  .site-nav .nav-links,
  .support-nav .nav-links,
  .privacy-nav .nav-links,
  .terms-nav .nav-links,
  .guides-nav .nav-links {
    grid-area: links;
    width: 100%;
    flex-wrap: wrap;
    justify-content: flex-start;
    gap: 10px 12px;
  }
  .site-nav .language-menu,
  .support-nav .language-menu,
  .privacy-nav .language-menu,
  .terms-nav .language-menu,
  .guides-nav .language-menu {
    grid-area: lang;
    justify-self: end;
  }
  .privacy-nav,
  .terms-nav {
    height: auto;
    min-height: 68px;
    align-items: flex-start;
    padding-top: 18px;
  }
  .guides-back,
  .guides-read-more { display: inline-flex; }
  .support-nav-links { gap: 12px; }
  .privacy-nav-links,
  .terms-nav-links { gap: 12px; }
  .support-nav .pill { display: inline-flex; }
  .support-topic-grid,
  .support-box { grid-template-columns: 1fr; }
  .support-card,
  .support-email-panel { padding: 24px; }
  .support-section { padding: 28px 0; }
  .support-privacy { padding-bottom: 64px; }
  .privacy-main,
  .terms-main {
    width: min(100% - 28px, 780px);
    padding-top: 18px;
    padding-bottom: 66px;
  }
  .guides-hero {
    padding-top: 34px;
  }
  .guides-list {
    grid-template-columns: 1fr;
    padding-bottom: 68px;
  }
  .guides-card,
  .guides-empty,
  .guides-article {
    padding: 24px;
  }
  .guides-post {
    width: min(100% - 28px, 820px);
    padding-bottom: 70px;
  }
}

@media (max-width: 480px) {
  .wrap { width: min(100% - 24px, 1120px); }
  .nav { gap: 12px; }
  .brand { gap: 9px; }
  .brand img { width: 30px; height: 30px; }
  .site-nav,
  .support-nav,
  .privacy-nav,
  .terms-nav,
  .guides-nav {
    gap: 8px 10px;
    padding-top: 14px;
  }
  .site-nav .nav-links,
  .support-nav .nav-links,
  .privacy-nav .nav-links,
  .terms-nav .nav-links,
  .guides-nav .nav-links {
    gap: 8px 10px;
  }
  .support-nav .pill {
    display: inline-flex;
  }
  .language-panel {
    position: fixed;
    top: 62px;
    right: 12px;
    left: 12px;
    width: auto;
  }
  .hero { padding: 34px 0 24px; }
  h1 {
    font-size: clamp(39px, 12vw, 46px);
    line-height: 1.02;
    letter-spacing: -0.055em;
  }
  html[lang="zh-CN"] h1,
  html[lang="ja"] h1,
  html[lang="fr"] h1 { letter-spacing: -0.04em; }
  .lead {
    margin-top: 20px;
    font-size: 18px;
    line-height: 1.5;
  }
  .actions {
    align-items: stretch;
    gap: 10px;
  }
  .button { width: 100%; }
  .preview { padding: 24px 0 44px; }
  .device { border-radius: 20px; padding: 5px; }
  .device img { border-radius: 15px; }
  .section { padding: 44px 0; }
  .card { border-radius: 22px; padding: 22px; }
  .feature { min-height: 0; }
  .section-head h2,
  .quote h2 { letter-spacing: -0.045em; }
  .map-gallery { padding: 44px 0 58px; }
  .map-copy { padding: 16px; }
  .current-work-hub { padding: 0 0 52px; }
  .hub-preview { margin-top: 24px; }
  .hub-device { border-radius: 20px; padding: 5px; }
  .hub-device img { border-radius: 15px; }
  .hub-point { padding: 18px; }
  .closing-showcase { margin-top: 24px; }
  .closing-showcase-points { grid-template-columns: 1fr; margin-top: 14px; }
  .closing-point { padding: 18px; }
  .support-nav-links { justify-content: flex-start; }
  .support-nav-links .pill { padding: 8px 11px; }
  .locale-prompt-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .locale-prompt .pill {
    width: 100%;
    flex: none;
  }
  .support-card,
  .support-email-panel {
    border-radius: 22px;
    padding: 21px;
  }
  .privacy-nav,
  .terms-nav {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .privacy-nav-links,
  .terms-nav-links { justify-content: flex-start; }
  .locale-prompt {
    margin-top: 8px;
    padding: 14px 15px;
    border-radius: 18px;
    align-items: flex-start;
    flex-direction: column;
  }
  .locale-prompt-actions {
    width: 100%;
  }
  .locale-prompt .pill {
    display: inline-flex;
    flex: 1 1 0;
    justify-content: center;
  }
  .privacy-main,
  .terms-main {
    width: min(100% - 24px, 780px);
    padding-top: 14px;
    padding-bottom: 58px;
  }
  .guides-nav {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "brand lang"
      "links links";
  }
  .guides-nav-links {
    justify-content: flex-start;
  }
  .guides-nav .nav-right {
    display: contents;
  }
  .guides-nav .brand {
    grid-area: brand;
  }
  .guides-nav .nav-links {
    grid-area: links;
    width: 100%;
    flex-wrap: wrap;
    gap: 8px 10px;
  }
  .guides-nav .language-menu {
    grid-area: lang;
    justify-self: end;
  }
  .support-nav {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "brand lang"
      "links links";
  }
  .support-nav .nav-right {
    display: contents;
  }
  .support-nav .brand {
    grid-area: brand;
  }
  .support-nav .nav-links {
    grid-area: links;
    width: 100%;
    flex-wrap: wrap;
    gap: 8px 10px;
  }
  .support-nav .language-menu {
    grid-area: lang;
    justify-self: end;
  }
  .privacy-nav,
  .terms-nav {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "brand lang"
      "links links";
  }
  .privacy-nav .nav-right,
  .terms-nav .nav-right {
    display: contents;
  }
  .privacy-nav .brand,
  .terms-nav .brand {
    grid-area: brand;
  }
  .privacy-nav .nav-links,
  .terms-nav .nav-links {
    grid-area: links;
    width: 100%;
    flex-wrap: wrap;
    gap: 8px 10px;
  }
  .privacy-nav .language-menu,
  .terms-nav .language-menu {
    grid-area: lang;
    justify-self: end;
  }
  .footer-inner--beian {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
  }
  .footer-inner--beian .footer-main {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
  }
  .footer-inner--beian .footer-main > span:first-child {
    text-align: center;
  }
  .footer-inner--beian .footer-links {
    justify-self: center;
    justify-content: center;
  }
  .footer-inner--beian .footer-beian {
    white-space: normal;
  }
  .guides-post {
    width: min(100% - 24px, 820px);
    padding-top: 18px;
    padding-bottom: 58px;
  }
  .guides-hero {
    padding-top: 28px;
  }
  .guides-card h2 {
    letter-spacing: -0.035em;
  }
  .guides-article {
    padding: 22px;
  }
  .guides-article h1 {
    letter-spacing: -0.055em;
  }
  .guides-summary,
  .guides-prose {
    font-size: 16px;
    line-height: 1.72;
  }
  .guides-back,
  .guides-read-more {
    display: inline-flex;
  }
  .privacy-prose,
  .terms-prose {
    font-size: 16px;
    line-height: 1.7;
  }
  .privacy-prose h1,
  .terms-prose h1 {
    font-size: clamp(30px, 11vw, 38px);
  }
}