.usage-overview {display:grid;grid-template-columns:1.15fr 1fr;gap:48px;align-items:center}
.usage-overview>div {min-width:0}
.usage-flow-title {font-size:1.2rem;margin-bottom:20px}
.usage-steps {display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;list-style:none;padding:0;margin:0 0 28px}
.usage-steps>li {position:relative;min-width:0;padding:20px 12px;background:var(--surface);border-top:3px solid var(--brand);text-align:center}
.usage-step-number {display:block;font-size:.85rem;font-weight:700;color:var(--brand);margin-bottom:6px}
.usage-step-icon {width:56px;height:56px;margin:0 auto 10px}
.usage-steps h4 {font-size:1.15rem;margin:0 0 12px;color:var(--brand)}
.usage-steps p {font-size:.9rem;line-height:1.85}
.usage-step-arrow {position:absolute;right:-28px;top:50%;width:28px;line-height:28px;transform:translateY(-50%);font-size:1.5rem;font-weight:700;color:var(--brand)}
.usage-screen img {width:100%;border:1px solid var(--line)}
.usage-screen figcaption {font-size:.85rem;color:var(--muted);line-height:1.8;margin-top:12px}
.feature-flow {scroll-margin-top:calc(var(--site-header-height,88px) + 24px)}
.feature-flow>h3 {font-size:1.35rem;margin-bottom:22px}
#features .flow-card {background:var(--surface)}
.feature-mode-link {display:inline-block;margin-top:24px}
.home-selection-note {margin:0 0 18px;font-size:.9rem;line-height:1.85}
.home-selection-note a {display:inline-block;margin-left:.5em;max-width:100%}
@media(max-width:640px){.home-selection-note a {margin-left:0}}
.home-pc-next {margin-top:16px}
.home-modes .mode-card {background:var(--surface);display:flex;flex-direction:column;min-width:0}
.home-modes .mode-purpose {font-size:1rem}
.home-modes .mode-title-phrase {white-space:nowrap}
#modes-title {text-wrap:balance}
.home-modes .mode-card h3 {font-size:1.5rem;margin-bottom:8px}
.home-modes .home-mode-name {font-size:.9rem;margin:0}
.home-mode-flow {display:flex;align-items:center;justify-content:center;gap:16px;padding:18px 10px;margin:20px 0;background:var(--paper);border:1px solid var(--line);font-weight:600;color:var(--brand)}
.home-mode-flow b {display:flex;flex-direction:column;align-items:center;font-size:1.4rem;line-height:1.2}
.home-mode-flow small {font-size:.75rem;font-weight:400;white-space:nowrap}
.memory .home-mode-flow {color:var(--accent)}
.home-mode-facts {margin:18px 0}
.home-mode-facts>div {border-top:1px solid var(--line);padding:16px 0}
.home-mode-facts dt {font-size:.9rem;font-weight:600;margin-bottom:6px}
.home-mode-facts dd {margin:0;font-size:.94rem;line-height:1.85}
.home-mode-facts strong {color:var(--ink)}
.home-modes .mode-card>.text-link {margin-top:auto;font-size:.9rem}
.home-mode-condition {margin-top:22px}
.home-mode-next {margin-top:24px;padding-top:24px;border-top:1px solid var(--line)}
.home-mode-next p+p {margin-top:14px}
#pc-selection {scroll-margin-top:calc(var(--site-header-height,88px) + 24px)}
.home-pc-selection {margin-top:48px;padding-top:36px;border-top:1px solid var(--line);scroll-margin-top:calc(var(--site-header-height,88px) + 24px)}
.home-pc-intro {margin-bottom:24px}
.home-pc-intro h2 span {display:inline-block}
.home-pc-grid {display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.home-pc-card {min-width:0;padding:28px;background:var(--surface);border-top:3px solid var(--brand);border-radius:var(--radius);display:grid;grid-template-rows:subgrid;grid-row:span 5;row-gap:0}
.home-pc-card h3 {font-size:1.4rem;line-height:1.6;margin:0 0 20px;color:var(--brand)}
.home-pc-purpose {margin:0 0 24px;font-size:1.05rem;line-height:1.9;overflow-wrap:anywhere}
.home-pc-purpose-lead {display:block;margin-bottom:8px;font-size:1.12rem;line-height:1.7}
.home-pc-photo {margin:0 0 20px}
.home-pc-photo img {display:block;width:100%;height:auto;aspect-ratio:16/10;object-fit:contain;background:var(--paper);border-radius:8px}
.home-pc-photo figcaption {margin-top:8px;font-size:.8rem;line-height:1.7;color:var(--muted)}
.home-pc-description {margin:0;font-size:1rem;line-height:1.9;overflow-wrap:anywhere}
.home-pc-card strong {color:var(--brand);font-weight:700}
.home-pc-card>.text-link {align-self:end;justify-self:start;margin-top:16px;font-size:.95rem}
@media(max-width:900px){
 .home-pc-card {padding:24px}
}
@media(max-width:640px){
 .home-pc-selection {margin-top:32px;padding-top:28px}
 .home-pc-grid {grid-template-columns:1fr;gap:20px}
 .home-pc-card {display:block;grid-row:auto;padding:22px 18px}
 .home-pc-card h3 {font-size:1.25rem}
 .home-pc-card>.text-link {display:inline-block}
}
.home-applications .home-application {margin-top:48px;padding-top:36px;border-top:1px solid var(--line);scroll-margin-top:calc(var(--site-header-height,88px) + 24px)}
.home-applications .home-application h3 {font-size:1.5rem;margin-bottom:18px;line-height:1.6}
.home-applications .home-application h4 {font-size:1.1rem;margin-bottom:12px}
.home-applications .home-application p+.text-link {display:inline-block;margin-top:18px}
.home-applications .home-reuse-summary {margin-top:22px}
.home-applications .feature-flow>h3 {font-size:1.5rem;margin-bottom:18px;line-height:1.6}
.home-playback-intro {margin-bottom:24px}
.home-applications .home-heading-phrase {display:inline-block}
.home-applications .flow-card,.home-applications .sounder-diagram {background:var(--paper)!important}
@media(max-width:640px){
 .home-modes .mode-card {padding:22px 18px}
 .home-mode-flow {gap:12px;font-size:.9rem}
 .home-modes .mode-card h3 {font-size:1.3rem}
 .home-applications .home-application {margin-top:32px;padding-top:28px}
}
.mode-combination {margin-top:28px}
.contact-section.surface {background:var(--surface)}
.contact-delivery {margin-top:32px;padding-top:28px;border-top:1px solid var(--line)}
.contact-delivery>h3 {font-size:1.25rem;margin-bottom:24px}
.contact-delivery .step-number {font-size:1.4rem;margin-bottom:10px}
.contact-delivery h4 {font-size:1rem}
.contact-delivery p {font-size:.9rem;margin-top:8px}
#ready-title {scroll-margin-top:calc(var(--site-header-height,88px) + 24px)}
.faq-answer p {margin:0 0 16px}
.faq-answer .faq-formula {padding:16px;background:var(--surface);color:var(--ink);font-weight:500;overflow-wrap:anywhere;line-height:1.9}
.faq-list details[id] {scroll-margin-top:calc(var(--site-header-height,88px) + 24px)}
.case-photo {width:100%;margin:0 0 22px}
.case-photo>img {width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--radius)}
.case-photo-telecom>img {object-position:center 20%}
.home-photo-notes {padding:24px 0;background:var(--paper);color:var(--muted);font-size:.75rem;line-height:1.9}
.home-photo-notes p {margin:0}
.home-photo-notes .home-photo-credits {margin-top:6px}
.home-photo-credits>span {display:inline-block;max-width:100%;margin-right:1.2em;overflow-wrap:anywhere}
/* Photos introduce the use case; the existing diagrams explain the system. */
.feature-photo-intro {display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);align-items:center;gap:48px;margin-bottom:36px}
.feature-photo-intro .section-intro {margin:0;max-width:none}
.feature-photo {position:relative;min-width:0;margin:0;overflow:hidden;border-radius:var(--radius)}
.feature-photo>img {display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:cover}
.feature-photo-evaluation>img {object-position:center 58%}
.feature-photo-sounding {margin-top:28px}
#synchronization .sync-layout {gap:32px 48px;align-items:center}
#synchronization .sync-detail {grid-column:1/-1}
@media(max-width:900px){
 .feature-photo-intro {gap:28px}
 #synchronization .sync-layout {gap:28px}
}
@media(max-width:767px){
 .feature-photo-intro {grid-template-columns:1fr;gap:24px;margin-bottom:28px}
}
@media(max-width:1100px){
 .usage-overview {grid-template-columns:1fr;gap:28px}
 .usage-screen {width:100%;max-width:640px;margin-inline:auto}
}
@media(max-width:640px){
 .usage-steps {grid-template-columns:1fr;gap:32px}
 .usage-steps>li {padding:14px 20px}
 .usage-step-icon {width:48px;height:48px;margin-bottom:8px}
 .usage-steps h4 {margin-bottom:8px}
 .usage-step-arrow {right:auto;top:auto;bottom:-32px;left:50%;width:32px;line-height:32px;transform:translateX(-50%) rotate(90deg)}
 .usage-overview .button {width:100%;gap:12px}
 .faq-answer .faq-formula {padding:12px}
}

/* Home page: full-width overview and independent PC selection (2026-09-29). */
body:has(.home-hero-overview) .site-header {border-bottom:3px solid rgba(255,255,255,.28)}
.home-hero-heading {background:var(--paper);color:var(--ink)}
.home-hero-image-area {background:var(--tint)}
.home-hero-layout {padding-block:32px 12px}
.home-hero-copy {text-align:left;padding-block:48px 40px}
.home-hero-overview h1 {font-size:clamp(2rem,2.65vw,2.25rem);line-height:1.3;color:var(--ink)}
.home-hero-overview h1 span {display:inline-block;color:inherit}
.home-hero-tagline {margin-top:16px;font-size:clamp(2.5rem,3.8vw,3.25rem);font-weight:700;line-height:1.4;color:var(--ink)}
.home-hero-tagline span {display:block}
.home-hero-package {margin-top:24px;text-align:left;color:var(--muted);font-size:1.0625rem;line-height:1.85}
.home-hero-package span {display:inline-block;max-width:100%}
.home-hero-links {display:flex;align-items:center;justify-content:flex-start;flex-wrap:wrap;gap:16px 20px;margin-top:24px}
.home-hero-links .text-link {font-size:.95rem}
.home-hero-art {margin:0}
.home-hero-art picture {display:block}
.home-hero-art img {display:block;width:100%;height:auto}
.home-hero-enlarge {display:none}
.home-hero-enlarge a {color:var(--brand)}
.home-pc-section .home-pc-selection {margin-top:0;padding-top:0;border-top:0}
.home-pc-section .home-pc-intro {margin-bottom:40px}
.home-modes.surface .mode-card {background:var(--paper)}
.home-modes.surface .home-mode-flow {background:var(--surface)}
.home-lineup-area {background:var(--tint)}
.home-lineup-summary {padding-block:22px 24px}
.home-lineup-label {margin-bottom:12px;font-size:1rem;font-weight:700;color:var(--ink)}
.home-lineup-specs {display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin:0}
.home-lineup-specs>div+div {border-left:1px solid var(--line);padding-left:24px}
.home-lineup-specs dt {font-size:.9rem;color:var(--muted)}
.home-lineup-specs dd {margin:4px 0 0}
.home-lineup-specs strong {display:block;font-size:clamp(1.2rem,2vw,1.5rem);color:var(--brand)}
.home-lineup-specs small {display:block;margin-top:4px;font-size:.8rem;line-height:1.7;color:var(--muted)}
.home-lineup-summary>.note {margin-top:14px}
@media(max-width:640px){
 .home-hero-layout {padding-block:20px 8px}
 .home-hero-copy {text-align:left;padding-block:32px}
 .home-hero-overview h1 {font-size:clamp(1.375rem,5.9vw,1.5rem)}
 .home-hero-tagline {font-size:clamp(1.5rem,7.5vw,1.875rem);margin-top:12px;line-height:1.5}
 .home-hero-package {text-align:left;font-size:.95rem;margin-top:20px}
 .home-hero-links {align-items:stretch;flex-direction:column;gap:18px;margin-top:20px}
 .home-hero-links .button {padding-inline:12px}
 .home-hero-art {margin:0}
 .home-hero-enlarge {display:block;text-align:right;margin-top:10px;font-size:.85rem}
 .home-pc-section .home-pc-intro {margin-bottom:28px}
 .home-lineup-summary {padding-block:18px 20px}
 .home-lineup-specs {grid-template-columns:1fr;gap:12px}
 .home-lineup-specs>div {display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:baseline;gap:0 12px}
 .home-lineup-specs dd {margin:0}
 .home-lineup-specs .home-lineup-condition {grid-column:1 / -1}
 .home-lineup-specs strong {font-size:1.25rem;white-space:nowrap}
 .home-lineup-specs>div+div {border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:10px}
}

@media(max-width:350px){
 .home-lineup-specs>div {grid-template-columns:1fr}
}

/* Approved streaming illustration, shared by desktop and mobile. */
.home-modes .streaming-illustration, .home-modes .memory-illustration {margin:20px 0;background:#fff}
.home-modes .streaming-illustration img, .home-modes .memory-illustration img {display:block;width:100%;height:auto}
@media (max-width:900px) {.home-modes .mode-grid {grid-template-columns:1fr}}

/* Recording and playback descriptions in the home method cards. */
.home-modes .home-modes-intro {max-width:none;margin-bottom:36px}
.home-modes .mode-operation {border-top:1px solid var(--line);padding:18px 0 4px}
.home-modes .mode-operation h4 {display:flex;flex-wrap:wrap;gap:6px 12px;font-size:1.05rem;margin:0 0 10px}
.home-modes .mode-operation h4 span {color:var(--brand)}
.home-modes .mode-operation-tx h4 span {color:var(--accent)}
.home-modes .mode-operation p {margin:0 0 10px}
.home-modes .mode-benefits {padding-left:1.2em;margin:4px 0 20px}
.home-modes .mode-benefits li::marker {content:"・ "}
/* Each recording mode occupies one row; diagrams and descriptions share a row on desktop. */
.home-modes .mode-grid {grid-template-columns:minmax(0,1fr)}
.home-modes .home-mode-body {display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:32px;align-items:start;margin-top:16px}
.home-modes .home-mode-description {min-width:0}
.home-modes .home-mode-body figure {margin:0}
.home-modes .home-mode-description>.text-link {display:inline-block;margin-top:12px;font-size:.9rem}
@media(max-width:900px){
 .home-modes .home-mode-body {grid-template-columns:minmax(0,1fr);gap:20px}
}

/* Home contact: approved layout rough. */
.home-contact {text-align:center}
.home-contact .contact-intro {margin-inline:auto}
.home-contact-actions {display:flex;justify-content:center;gap:16px;flex-wrap:wrap;margin-top:28px}
.home-contact-actions button {font:inherit;cursor:pointer}
.home-contact [hidden] {display:none!important}
.home-contact .contact-options {text-align:left;max-width:960px;margin-inline:auto}
.home-contact-delivery {margin-top:32px}
.home-contact-steps {display:flex;gap:36px;list-style:none;padding:0;margin:0 auto;max-width:960px;color:var(--brand)}
.home-contact-steps li {position:relative;flex:1;padding:16px 12px;background:var(--tint)}
.home-contact-steps li+li::before {content:"→";position:absolute;left:-36px;width:36px;top:50%;transform:translateY(-50%)}
@media(max-width:640px){
 .home-contact-actions {flex-direction:column;align-items:stretch}
 .home-contact .contact-intro p br {display:none}
 .home-contact-steps {flex-direction:column;gap:30px}
 .home-contact-steps li+li::before {content:"↓";top:-30px;left:50%;height:30px;line-height:30px;transform:translateX(-50%)}
}
.home-contact .contact-intro h2 {text-wrap:balance}

.contact-break-mobile {display:none}
@media(max-width:640px){.home-contact .contact-intro h2 {font-size:clamp(1.1rem,5.8vw,1.5rem)}.contact-break-mobile {display:initial}.contact-break-desktop {display:none}}

/* Compact GUI introduction, retaining the established operation icons. */
#software {padding-block:40px}
#software .section-intro {margin-bottom:24px}
#software .section-intro h2 {font-size:clamp(1.4rem,2.1vw,1.85rem)}
#software .usage-overview {grid-template-columns:1fr 1.1fr;gap:32px}
#software .usage-flow-title {margin-bottom:16px}
#software .usage-steps {gap:24px;margin-bottom:20px}
#software .usage-steps>li {padding:14px 8px;border-top:0;background:var(--tint)}
#software .usage-step-icon {width:48px;height:48px;margin:0 auto 10px}
#software .usage-steps h4 {margin-bottom:8px}
#software .usage-steps p {font-size:.875rem;line-height:1.7}
#software .usage-step-arrow {right:-24px;width:24px}
#software .usage-provided {font-size:.85rem;color:var(--muted);margin-top:16px}
@media(max-width:1100px){#software .usage-overview {grid-template-columns:1fr;gap:24px}}
@media(max-width:640px){
 #software {padding-block:28px}
 #software .usage-steps {gap:28px}
 #software .usage-steps>li {display:grid;grid-template-columns:48px minmax(0,1fr);gap:16px;align-items:center;text-align:left;padding:14px 16px}
 #software .usage-step-icon {margin:0}
 #software .usage-steps h4 {margin-bottom:4px}
 #software .usage-step-arrow {right:auto;bottom:-28px;width:28px;line-height:28px}
}

/* Applications: one section with three existing photographs. */
.home-applications {padding-block:40px}
.home-applications .section-intro {margin-bottom:24px}
.home-applications .section-intro h2 {font-size:clamp(1.4rem,2.1vw,1.85rem)}
.application-grid {display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}
.application-item {position:relative;min-width:0;display:flex;flex-direction:column;scroll-margin-top:calc(var(--site-header-height,88px) + 24px)}
.application-anchor {position:absolute;top:0;scroll-margin-top:calc(var(--site-header-height,88px) + 24px)}
.application-photo {margin:0 0 20px}
.application-photo img {display:block;width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:4px}
.application-item h3 {font-size:1.2rem;line-height:1.6;margin:0 0 12px}
.application-item>p {font-size:.95rem;line-height:1.85;margin:0 0 16px}
.application-item>.application-condition {font-size:.85rem;color:var(--muted)}
.application-links {display:flex;flex-direction:column;align-items:flex-start;gap:10px;margin-top:auto;padding-top:8px}
.application-links .text-link {font-size:.875rem}
@media(max-width:900px){
 .application-grid {grid-template-columns:1fr;gap:32px}
 .application-photo img {max-height:360px}
 .application-item+.application-item {border-top:1px solid var(--line);padding-top:28px}
}
@media(max-width:640px){.home-applications {padding-block:28px}}

.home-system-components {display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;margin:0 0 36px;padding:0 0 28px;border-bottom:1px solid var(--line)}
.home-system-components>div {min-width:0}
.home-system-components dt {font-size:1.1rem;font-weight:700;color:var(--brand);margin-bottom:8px}
.home-system-components dd {margin:0;line-height:1.85}
.home-system-note {margin-top:20px;line-height:1.85}
.home-system-pc-links {margin-top:12px;font-size:.95rem;line-height:1.85}
.home-system-pc-links a {display:inline-block}
@media(max-width:900px){.home-system-components {grid-template-columns:1fr;gap:20px}}