:root {
  color-scheme: light;
  --ink: #213650;
  --body: #55677a;
  --muted: #66717d;
  --accent: #b34f40;
  --line: #e3e8ec;
  --paper: #fcfcfa;
  --soft: #f1f5f8;
  --radius: 18px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; }
body { margin: 0; color: var(--ink); background: var(--paper); font: 16px/1.75 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", sans-serif; -webkit-font-smoothing: antialiased; }
a { color: #345979; text-decoration-thickness: 1px; text-underline-offset: 4px; }
a:hover { color: var(--accent); }
a:focus-visible, summary:focus-visible { outline: 3px solid #d68676; outline-offset: 5px; border-radius: 4px; }
img { display: block; max-width: 100%; height: auto; }
svg { flex-shrink: 0; }
h1, h2, h3, p, figure { margin: 0; }
h1, h2, h3 { text-wrap: balance; }
ul, ol { margin-top: 0; }
code { font: .85em/1.6 ui-monospace, SFMono-Regular, Menlo, monospace; padding: 3px 6px; background: #eef2f5; border-radius: 5px; overflow-wrap: anywhere; }
.container { width: min(100% - 64px, 1152px); margin-inline: auto; }
.skip-link { position: absolute; z-index: 20; top: -80px; left: 24px; padding: 10px 18px; color: white; background: var(--ink); }
.skip-link:focus { top: 12px; }
.site-header { position: sticky; top: 0; z-index: 10; background: rgb(252 252 250 / 96%); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
.header-inner { min-height: 80px; display: flex; justify-content: space-between; align-items: center; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: var(--ink); text-decoration: none; font-size: 19px; font-weight: 650; white-space: nowrap; letter-spacing: -.025em; }
.brand img { width: 42px; height: 42px; }
.main-nav { display: flex; align-items: center; gap: 25px; font-size: 14px; }
.main-nav a { color: var(--body); text-decoration: none; }
.main-nav a:hover { color: var(--accent); }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 9px; min-height: 48px; padding: 12px 20px; color: #fff; background: var(--ink); border: 1px solid var(--ink); border-radius: 10px; text-decoration: none; font-size: 15px; font-weight: 600; line-height: 1.4; }
.button:hover { background: #34516f; border-color: #34516f; color: #fff; }
.button.secondary { color: var(--ink); background: transparent; border-color: #d8e0e7; }
.button.secondary:hover { color: var(--ink); border-color: #a4b4c4; background: #f1f5f8; }
.button.small { min-height: 40px; padding: 9px 15px; font-size: 13px; }
.button svg { width: 17px; height: 17px; }
.hero { display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; gap: 68px; padding-top: 66px; padding-bottom: 78px; }
.eyebrow { display: flex; align-items: center; gap: 9px; color: var(--accent); font-size: 13px; font-weight: 600; letter-spacing: .025em; }
.eyebrow::before { content: ""; width: 18px; height: 2px; background: currentColor; }
.hero h1 { font-size: clamp(44px, 4.8vw, 64px); line-height: 1.2; letter-spacing: -.055em; font-weight: 650; margin: 23px 0; }
.hero-description { max-width: 510px; font-size: 19px; line-height: 1.85; color: var(--body); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 29px; }
.compatibility { margin-top: 17px; font-size: 13px; color: var(--muted); }
.preview-note { margin-top: 13px; max-width: 490px; font-size: 13px; line-height: 1.7; color: var(--muted); }
.hero-links { display: flex; gap: 21px; flex-wrap: wrap; margin-top: 24px; font-size: 14px; }
.hero-visual { align-self: stretch; display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 14px; }
.menu-stage { width: 100%; min-height: 542px; display: flex; align-items: center; justify-content: center; border: 1px solid #e5e9ed; border-radius: 25px; padding: 20px 28px; background: linear-gradient(145deg, #fbfcfc, #f0f4f7); }
.menu-stage img { max-height: 508px; width: auto; max-width: 100%; object-fit: contain; box-shadow: 0 12px 32px rgb(37 53 72 / 8%); }
figcaption { font-size: 12px; line-height: 1.6; color: var(--muted); }
.section { padding: 76px 0; border-top: 1px solid var(--line); }
.section-heading { display: flex; justify-content: space-between; gap: 32px; align-items: end; margin-bottom: 33px; }
.section-heading h2 { max-width: 670px; margin-top: 15px; font-size: clamp(27px, 3vw, 36px); line-height: 1.4; letter-spacing: -.035em; font-weight: 650; }
.section-heading > p { max-width: 350px; font-size: 15px; color: var(--body); }
.behavior-row { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.behavior { display: grid; grid-template-columns: 38px 1fr; gap: 17px; }
.behavior svg { width: 36px; height: 36px; color: #5c7895; }
.behavior h3 { font-size: 20px; margin-bottom: 9px; font-weight: 600; }
.behavior p { font-size: 15px; color: var(--body); }
.feature-gallery { display: grid; grid-template-columns: 1fr 1fr; gap: 25px; margin-top: 40px; }
.feature-panel { overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: white; }
.feature-image { display: block; background: #fafbfb; }
.feature-image img { width: 100%; aspect-ratio: 8/5; object-fit: contain; }
.feature-copy { padding: 23px 25px 25px; border-top: 1px solid var(--line); }
.feature-copy h3 { font-size: 19px; margin-bottom: 10px; font-weight: 600; }
.feature-copy p { font-size: 14px; color: var(--body); }
.feature-copy .caption-note { font-size: 12px; color: var(--muted); margin-top: 13px; }
.parameter-example { display: grid; grid-template-columns: 1fr 1.05fr; gap: 40px; align-items: center; padding: 31px 35px; margin-top: 29px; border-radius: var(--radius); background: #edf2f6; }
.parameter-example h3 { font-size: 18px; margin-bottom: 8px; font-weight: 600; }
.parameter-example p { font-size: 14px; color: var(--body); }
.example-code { display: flex; flex-wrap: wrap; align-items: center; gap: 11px; font-size: 16px; }
.example-code code { background: white; padding: 9px 12px; border: 1px solid #dee6ec; }
.example-code span { color: var(--accent); }
.example-label { display: block; margin-top: 8px; font-size: 12px; color: var(--muted); }
.install-layout { display: grid; grid-template-columns: 300px 1fr; gap: 66px; align-items: start; }
.install-summary h2 { margin: 15px 0 18px; font-size: 34px; line-height: 1.4; letter-spacing: -.035em; font-weight: 650; }
.install-summary p { font-size: 15px; color: var(--body); }
.install-summary .button { width: 100%; margin-top: 24px; }
.store-note { padding-top: 23px; margin-top: 25px; border-top: 1px solid var(--line); }
.store-note p { font-size: 13px; color: var(--muted); }
.store-note a { display: inline-block; margin-top: 9px; font-size: 13px; }
.steps { list-style: none; counter-reset: install; padding: 0; margin: 0; }
.steps li { position: relative; counter-increment: install; padding: 0 0 27px 59px; margin-bottom: 23px; border-bottom: 1px solid var(--line); }
.steps li:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: 0; }
.steps li::before { content: counter(install, decimal-leading-zero); position: absolute; left: 0; top: 0; color: #5b7188; font-size: 16px; font-weight: 550; }
.steps h3 { font-size: 19px; margin-bottom: 9px; font-weight: 600; }
.steps p { color: var(--body); font-size: 15px; }
.steps p + p { margin-top: 11px; }
.steps .fine { font-size: 13px; color: var(--muted); }
.verify-section { background: #f1f5f8; }
.verify-setup { max-width: 880px; margin-bottom: 27px; font-size: 15px; color: var(--body); }
.verify-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 19px; }
.verify-card { display: flex; flex-direction: column; border: 1px solid #dde5ec; border-radius: var(--radius); padding: 26px; background: white; }
.verify-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 13px; }
.verify-card p { font-size: 14px; color: var(--body); margin-bottom: 25px; }
.verify-card .step-number { font-size: 12px; color: var(--accent); font-weight: 600; letter-spacing: .06em; margin-bottom: 18px; }
.verify-card .button { margin-top: auto; font-size: 14px; min-height: 43px; }
.verify-note { max-width: 900px; font-size: 13px; color: var(--muted); margin-top: 23px; }
.faq-layout { display: grid; grid-template-columns: 300px 1fr; gap: 66px; }
.faq-title h2 { font-size: 34px; line-height: 1.4; font-weight: 650; letter-spacing: -.035em; margin-top: 15px; }
.faq-title p { color: var(--body); font-size: 15px; margin-top: 16px; }
.faq-title a { display: inline-block; margin-top: 16px; font-size: 14px; }
.faq-list { border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); }
summary { display: flex; align-items: center; justify-content: space-between; gap: 22px; cursor: pointer; list-style: none; padding: 20px 0; font-size: 17px; font-weight: 550; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: #7d8da0; font-size: 23px; font-weight: 400; }
details[open] summary::after { content: "−"; }
details p { padding-bottom: 21px; padding-right: 36px; color: var(--body); font-size: 15px; }
.privacy-strip { display: flex; justify-content: space-between; align-items: center; gap: 30px; border: 1px solid var(--line); border-radius: var(--radius); padding: 31px 35px; margin-top: 45px; background: #fff; }
.privacy-strip h3 { font-size: 19px; font-weight: 600; margin-bottom: 8px; }
.privacy-strip p { font-size: 14px; color: var(--body); max-width: 790px; }
.privacy-strip a { flex-shrink: 0; font-size: 14px; }
.download-band { background: var(--ink); padding: 56px 0; color: #fff; }
.download-inner { display: flex; justify-content: space-between; align-items: center; gap: 36px; }
.download-inner h2 { font-size: 29px; font-weight: 600; line-height: 1.5; letter-spacing: -.025em; }
.download-inner p { color: #b7c4d2; font-size: 14px; margin-top: 7px; }
.download-inner .button { background: #fff; border-color: #fff; color: var(--ink); }
.download-inner .button:hover { background: #eaf0f5; border-color: #eaf0f5; }
.site-footer { padding: 29px 0 35px; border-top: 1px solid var(--line); }
.footer-inner { display: flex; justify-content: space-between; gap: 24px; align-items: center; font-size: 13px; color: var(--muted); }
.footer-links { display: flex; flex-wrap: wrap; gap: 22px; }
.footer-links a { color: var(--muted); text-decoration: none; }
.footer-links a:hover { color: var(--accent); }
.policy-main { width: min(100% - 64px, 840px); margin: 0 auto; padding: 66px 0 76px; }
.policy-main h1 { margin: 15px 0 21px; font-size: clamp(36px, 5vw, 48px); line-height: 1.35; letter-spacing: -.04em; font-weight: 650; }
.policy-meta { font-size: 14px; color: var(--muted); margin-bottom: 27px; }
.policy-note { border-left: 3px solid var(--accent); background: #f2f5f7; border-radius: 0 10px 10px 0; padding: 20px 24px; color: var(--body); margin-bottom: 38px; font-size: 15px; }
.policy-toc { display: flex; flex-wrap: wrap; gap: 8px 18px; padding: 20px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); margin-bottom: 34px; font-size: 13px; }
.policy-main section { margin-top: 33px; scroll-margin-top: 108px; }
.policy-main section h2 { font-size: 22px; line-height: 1.5; font-weight: 600; margin-bottom: 13px; }
.policy-main section p { font-size: 15px; color: var(--body); line-height: 1.95; margin-bottom: 17px; }
.policy-contact { border-top: 1px solid var(--line); margin-top: 39px; padding-top: 23px; font-size: 14px; color: var(--muted); }
@media (max-width: 1040px) {
  .container { width: min(100% - 48px, 1152px); }
  .main-nav { gap: 18px; }
  .hero { gap: 40px; padding-top: 46px; }
  .hero h1 { font-size: 51px; }
  .menu-stage { min-height: 488px; padding: 20px; }
  .menu-stage img { max-height: 452px; }
  .install-layout, .faq-layout { grid-template-columns: 255px 1fr; gap: 42px; }
  .parameter-example { gap: 22px; padding: 27px; }
  .verify-card { padding: 23px; }
}
@media (max-width: 760px) {
  html { scroll-padding-top: 85px; }
  .header-inner { min-height: 72px; gap: 12px; }
  .main-nav { display: none; }
  .hero { grid-template-columns: 1fr; gap: 35px; padding: 43px 0 53px; }
  .hero h1 { font-size: clamp(40px, 8vw, 57px); }
  .hero-description { max-width: 570px; font-size: 17px; }
  .hero-visual { width: 100%; max-width: 430px; justify-self: center; }
  .menu-stage { min-height: 480px; }
  .menu-stage img { max-height: 446px; }
  .section { padding: 51px 0; }
  .section-heading { display: block; margin-bottom: 27px; }
  .section-heading > p { max-width: 100%; margin-top: 17px; }
  .behavior-row { gap: 25px; }
  .behavior { grid-template-columns: 29px 1fr; gap: 12px; }
  .behavior svg { width: 27px; height: 27px; }
  .behavior h3 { font-size: 18px; }
  .feature-gallery { grid-template-columns: 1fr; gap: 24px; }
  .parameter-example { grid-template-columns: 1fr; gap: 21px; }
  .install-layout, .faq-layout { grid-template-columns: 1fr; gap: 34px; }
  .install-summary .button { width: auto; }
  .store-note { max-width: 560px; }
  .steps li { padding-left: 43px; }
  .verify-grid { grid-template-columns: 1fr; gap: 16px; }
  .verify-card p { margin-bottom: 20px; }
  .privacy-strip { display: block; padding: 25px; margin-top: 34px; }
  .privacy-strip a { display: inline-block; margin-top: 17px; }
  .download-inner { display: block; }
  .download-inner .button { margin-top: 22px; }
  .footer-inner { flex-direction: column; align-items: start; gap: 15px; }
  .policy-main { width: min(100% - 48px, 840px); padding-top: 43px; }
}
@media (max-width: 480px) {
  .container { width: calc(100% - 36px); }
  .brand { font-size: 15px; gap: 8px; }
  .brand img { width: 34px; height: 34px; }
  .header-inner .button { min-height: 37px; font-size: 12px; padding: 8px 11px; }
  .hero-actions { gap: 10px; }
  .hero-actions .button { width: 100%; }
  .hero h1 { letter-spacing: -.045em; }
  .hero-links { font-size: 13px; gap: 19px; }
  .menu-stage { min-height: 438px; padding: 18px; }
  .menu-stage img { max-height: 402px; }
  .behavior-row { grid-template-columns: 1fr; }
  .feature-copy { padding: 20px; }
  .parameter-example { padding: 23px; }
  .example-code { gap: 7px; font-size: 14px; }
  .example-code code { padding: 8px 10px; }
  .steps li { padding-left: 35px; }
  .verify-card { padding: 23px; }
  summary { font-size: 16px; gap: 14px; }
  details p { padding-right: 0; }
  .download-inner h2 { font-size: 25px; }
  .download-inner .button { width: 100%; }
  .policy-main { width: calc(100% - 36px); }
  .policy-note { padding: 17px 19px; }
  .policy-toc { gap: 9px 15px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }