:root {
  --brand: #2980fe;
  --brand-deep: #1767d6;
  --brand-soft: #eaf3ff;
  --brand-pale: #f5f8fd;
  --surface: #ffffff;
  --surface-alt: #f7f9fc;
  --text: #172033;
  --body: #465266;
  --muted: #718096;
  --border: #dce6f2;
  --footer: #10233f;
  --shadow: 0 18px 44px rgba(37, 91, 158, .10);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --container: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: var(--surface);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Microsoft JhengHei", Arial, sans-serif;
  line-height: 1.72;
  overflow-x: hidden;
}
body.menu-open { overflow: hidden; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--brand-deep); text-decoration: none; }
a:hover { color: var(--brand); }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 9999; padding: 10px 14px; background: var(--text); color: white; border-radius: 10px; }
.skip-link:focus { top: 12px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,.94);
  border-bottom: 1px solid rgba(220,230,242,.88);
  backdrop-filter: blur(18px);
}
.header-inner {
  width: min(var(--container), calc(100% - 40px));
  min-height: 78px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 170px minmax(0,1fr) auto;
  align-items: center;
  gap: 22px;
}
.brand { display: inline-flex; align-items: center; min-height: 44px; }
.brand img { object-fit: contain; }
.desktop-nav { display: flex; align-items: center; justify-content: center; gap: 4px; min-width: 0; white-space: nowrap; }
.desktop-nav > a, .nav-group > a { display: inline-flex; align-items: center; min-height: 46px; padding: 0 10px; color: var(--text); font-size: 15px; font-weight: 650; border-radius: 12px; }
.desktop-nav a:hover, .desktop-nav a.is-active { color: var(--brand-deep); background: var(--brand-soft); }
.nav-group { position: relative; }
.mega-menu {
  position: absolute;
  left: 50%;
  top: calc(100% + 10px);
  width: 620px;
  transform: translateX(-50%) translateY(8px);
  display: grid;
  grid-template-columns: 1.15fr 1fr 1fr;
  gap: 8px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: rgba(255,255,255,.98);
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: .18s ease;
}
.nav-group:hover .mega-menu, .nav-group:focus-within .mega-menu { opacity: 1; visibility: visible; pointer-events: auto; transform: translateX(-50%) translateY(0); }
.mega-menu a, .mega-intro { display: flex; flex-direction: column; gap: 3px; padding: 13px; border-radius: 14px; color: var(--text); white-space: normal; }
.mega-menu a:hover { background: var(--brand-pale); }
.mega-menu strong { font-size: 14px; }
.mega-menu span { color: var(--muted); font-size: 12px; line-height: 1.5; }
.mega-intro { background: linear-gradient(145deg, var(--brand-soft), white); border: 1px solid #cfe1ff; }
.header-actions { display: flex; align-items: center; justify-content: flex-end; gap: 8px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; border-radius: 14px; border: 1px solid transparent; font-weight: 750; line-height: 1; transition: transform .18s ease, box-shadow .18s ease, background .18s ease; }
.button:hover { transform: translateY(-1px); }
.button-primary { background: linear-gradient(135deg, var(--brand), var(--brand-deep)); color: white; box-shadow: 0 10px 25px rgba(41,128,254,.22); }
.button-primary:hover { color: white; box-shadow: 0 14px 30px rgba(41,128,254,.28); }
.button-secondary { background: white; color: var(--brand-deep); border-color: #bed6fb; }
.button-secondary:hover { background: var(--brand-soft); }
.button-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.button-compact { min-height: 42px; padding: 0 17px; border-radius: 12px; white-space: nowrap; }
.more-toggle, .mobile-menu-toggle, .mobile-menu-close { min-width: 44px; min-height: 44px; border: 1px solid var(--border); border-radius: 12px; background: white; color: var(--text); }
.mobile-menu-toggle { display: none; padding: 10px; flex-direction: column; justify-content: center; gap: 5px; }
.mobile-menu-toggle span { width: 22px; height: 2px; background: var(--text); border-radius: 3px; }
.quick-menu { position: fixed; right: max(20px, calc((100% - var(--container))/2)); top: 70px; z-index: 1100; min-width: 180px; padding: 10px; background: white; border: 1px solid var(--border); border-radius: 16px; box-shadow: var(--shadow); }
.quick-menu a { display: block; padding: 10px 12px; border-radius: 10px; color: var(--text); }
.quick-menu a:hover { background: var(--brand-pale); color: var(--brand-deep); }
.menu-overlay { position: fixed; inset: 0; z-index: 1190; background: rgba(16,35,63,.42); }
.mobile-menu { position: fixed; top: 0; right: 0; z-index: 1200; width: min(92vw, 440px); height: 100dvh; background: white; transform: translateX(105%); transition: transform .25s ease; overflow-y: auto; box-shadow: -20px 0 60px rgba(16,35,63,.16); }
.mobile-menu.is-open { transform: translateX(0); }
.mobile-menu-head { position: sticky; top: 0; z-index: 2; display: flex; align-items: center; justify-content: space-between; padding: 18px 20px; border-bottom: 1px solid var(--border); background: rgba(255,255,255,.96); }
.mobile-menu-close { font-size: 30px; line-height: 1; }
.mobile-menu-body { padding: 16px 20px 30px; }
.mobile-menu-body > a, .mobile-menu-body summary { min-height: 48px; display: flex; align-items: center; padding: 10px 12px; color: var(--text); font-weight: 750; border-radius: 12px; }
.mobile-menu-body details { border-bottom: 1px solid var(--border); }
.mobile-menu-body summary { list-style: none; justify-content: space-between; cursor: pointer; }
.mobile-menu-body summary::-webkit-details-marker { display: none; }
.mobile-menu-body summary::after { content: '+'; color: var(--brand); font-size: 22px; }
.mobile-menu-body details[open] summary::after { content: '−'; }
.mobile-menu-body details a { display: flex; align-items: center; min-height: 44px; margin-left: 12px; padding: 8px 12px; color: var(--body); border-left: 2px solid var(--brand-soft); }
.mobile-download { margin-top: 18px; color: white !important; }

main { min-height: 60vh; }
.container { width: min(var(--container), calc(100% - 40px)); margin: 0 auto; }
.section { padding: 92px 0; }
.section-sm { padding: 62px 0; }
.section-soft { background: var(--brand-pale); }
.section-blue { background: linear-gradient(135deg, #f2f7ff, #e7f1ff); }
.section-deep { color: white; background: linear-gradient(135deg, #102f58, #1767d6); }
.section-deep p, .section-deep .eyebrow { color: #d8e7ff; }
.section-deep a:not(.button) { color: white; }
.eyebrow { margin: 0 0 12px; color: var(--brand-deep); font-size: 13px; font-weight: 850; letter-spacing: .12em; text-transform: uppercase; }
.section-heading { max-width: 760px; margin-bottom: 36px; }
.section-heading.center { margin-left: auto; margin-right: auto; text-align: center; }
h1, h2, h3 { margin-top: 0; color: inherit; line-height: 1.2; letter-spacing: -.02em; }
h1 { font-size: clamp(40px, 6vw, 72px); margin-bottom: 22px; }
h2 { font-size: clamp(30px, 4vw, 48px); margin-bottom: 18px; }
h3 { font-size: 21px; margin-bottom: 10px; }
p { margin: 0 0 18px; color: var(--body); }
.lead { font-size: clamp(18px, 2vw, 22px); line-height: 1.65; }
.muted { color: var(--muted); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.text-link { display: inline-flex; align-items: center; gap: 7px; font-weight: 750; }
.text-link::after { content: '→'; }
.tag-row { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 26px; }
.tag { display: inline-flex; padding: 7px 11px; border-radius: 999px; background: var(--brand-soft); color: var(--brand-deep); font-size: 13px; font-weight: 750; }

.hero { position: relative; overflow: hidden; padding: 86px 0 76px; background: radial-gradient(circle at 80% 15%, #dceaff 0, rgba(220,234,255,0) 36%), linear-gradient(180deg, white, #f7faff); }
.hero::before { content: ''; position: absolute; width: 360px; height: 360px; border-radius: 50%; border: 1px solid rgba(41,128,254,.15); left: -120px; bottom: -170px; }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 54px; align-items: center; }
.hero-copy { max-width: 690px; }
.hero-visual { position: relative; min-height: 540px; display: grid; place-items: center; }
.hero-visual::before { content: ''; position: absolute; width: 430px; height: 430px; border-radius: 50%; background: radial-gradient(circle, rgba(41,128,254,.18), rgba(41,128,254,0) 66%); }
.hero-visual > img { position: relative; z-index: 1; max-height: 540px; object-fit: contain; filter: drop-shadow(0 25px 45px rgba(25,81,150,.18)); }
.float-note { position: absolute; z-index: 2; max-width: 200px; padding: 13px 15px; border-radius: 16px; background: rgba(255,255,255,.9); border: 1px solid rgba(220,230,242,.9); box-shadow: var(--shadow); backdrop-filter: blur(12px); }
.float-note strong { display: block; font-size: 14px; }
.float-note span { display: block; margin-top: 2px; color: var(--muted); font-size: 12px; }
.float-note.one { left: 0; top: 18%; }
.float-note.two { right: 0; top: 42%; }
.float-note.three { left: 8%; bottom: 12%; }
.capability-strip { display: grid; grid-template-columns: repeat(4,1fr); border: 1px solid var(--border); border-radius: 22px; background: white; box-shadow: 0 14px 36px rgba(35,80,140,.07); overflow: hidden; }
.capability-item { position: relative; padding: 28px; }
.capability-item + .capability-item { border-left: 1px solid var(--border); }
.capability-item span { display: block; margin-bottom: 8px; color: var(--brand); font-weight: 850; }
.capability-item p { font-size: 14px; margin: 0; }

.category-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; }
.category-card { min-height: 230px; padding: 28px; border: 1px solid var(--border); border-radius: var(--radius-lg); background: white; display: flex; flex-direction: column; justify-content: space-between; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
.category-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: #b8d2f6; }
.category-card.featured { grid-column: span 2; background: linear-gradient(135deg, var(--brand), var(--brand-deep)); color: white; border: 0; }
.category-card.featured p, .category-card.featured a { color: #e8f1ff; }
.category-card.wide { grid-column: span 2; background: linear-gradient(145deg, #edf5ff, white); }
.category-card .number { color: var(--brand); font-weight: 900; font-size: 12px; letter-spacing: .12em; }
.category-card.featured .number { color: white; }

.feature-panel { display: grid; grid-template-columns: .9fr 1.1fr; gap: 54px; align-items: center; padding: 46px; border-radius: var(--radius-xl); background: var(--brand-soft); }
.feature-panel .image-panel { min-height: 420px; display: grid; place-items: center; border-radius: 22px; background: white; border: 1px solid rgba(255,255,255,.7); }
.feature-panel .image-panel img { max-height: 410px; object-fit: contain; }
.check-list { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 12px; }
.check-list li { position: relative; padding-left: 30px; color: var(--body); }
.check-list li::before { content: '✓'; position: absolute; left: 0; top: 1px; width: 21px; height: 21px; display: grid; place-items: center; border-radius: 50%; background: var(--brand-soft); color: var(--brand-deep); font-size: 12px; font-weight: 900; }
.section-deep .check-list li { color: #eef5ff; }
.section-deep .check-list li::before { background: rgba(255,255,255,.14); color: white; }

.split-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.split-card { min-height: 100%; padding: 38px; border-radius: var(--radius-xl); border: 1px solid var(--border); background: white; }
.split-card.offset { transform: translateY(34px); background: var(--brand-pale); }
.split-card .mini-list { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 24px; }
.mini-list span { padding: 10px 12px; border-radius: 12px; background: var(--surface-alt); color: var(--body); font-size: 14px; }
.dual-feature { display: grid; grid-template-columns: 1.18fr .82fr; gap: 22px; }
.visual-card, .content-card { overflow: hidden; border-radius: var(--radius-xl); border: 1px solid var(--border); background: white; }
.visual-card .visual-img { min-height: 320px; display: grid; place-items: center; background: linear-gradient(150deg, #eef5ff, white); }
.visual-card .visual-img img { max-height: 330px; object-fit: contain; }
.visual-card .card-body, .content-card { padding: 36px; }
.content-card { background: linear-gradient(145deg, var(--brand-deep), #0f3f79); color: white; }
.content-card p { color: #d7e6fb; }
.safety-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 52px; align-items: center; }
.safety-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.safety-item { padding: 19px; border: 1px solid rgba(255,255,255,.18); border-radius: 16px; background: rgba(255,255,255,.07); }
.safety-item strong { display: block; margin-bottom: 5px; }
.safety-item span { display: block; color: #dbe9ff; font-size: 14px; }
.hardware-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 54px; align-items: center; }
.hardware-image { min-height: 440px; display: grid; place-items: center; border-radius: var(--radius-xl); background: linear-gradient(145deg, #f0f6ff, white); border: 1px solid var(--border); }
.hardware-image img { max-height: 420px; object-fit: contain; }
.swap-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 30px; align-items: stretch; }
.swap-visual { padding: 38px; border-radius: var(--radius-xl); background: linear-gradient(145deg, #edf5ff, white); border: 1px solid var(--border); }
.swap-visual img { max-height: 330px; margin: 0 auto 24px; object-fit: contain; }
.swap-checks { padding: 42px; border-radius: var(--radius-xl); background: white; border: 1px solid var(--border); box-shadow: var(--shadow); }
.process { display: grid; grid-template-columns: repeat(6,1fr); gap: 0; counter-reset: process; }
.process-step { position: relative; padding: 24px 18px 22px; border-top: 2px solid #bcd4f7; }
.process-step::before { counter-increment: process; content: counter(process); position: absolute; left: 18px; top: -18px; width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; background: var(--brand); color: white; font-size: 13px; font-weight: 900; box-shadow: 0 0 0 7px white; }
.process-step h3 { margin-top: 17px; font-size: 17px; }
.process-step p { font-size: 14px; }
.process-step a { font-size: 13px; font-weight: 800; }
.notice-list { display: grid; gap: 0; border-top: 1px solid var(--border); }
.notice-item { display: grid; grid-template-columns: 130px minmax(0,1fr) auto; gap: 24px; align-items: start; padding: 22px 0; border-bottom: 1px solid var(--border); }
.notice-item time { color: var(--brand-deep); font-size: 13px; font-weight: 850; }
.notice-item p { margin: 4px 0 0; }
.review-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.review-card { padding: 28px; border-radius: 20px; background: white; border: 1px solid var(--border); }
.review-card:nth-child(2n) { background: var(--brand-pale); }
.review-card p { margin: 0; }
.review-card strong { display: block; margin-top: 14px; color: var(--brand-deep); font-size: 13px; }
.faq-list { display: grid; gap: 12px; }
.faq-item { border: 1px solid var(--border); border-radius: 16px; background: white; overflow: hidden; }
.faq-question { width: 100%; min-height: 60px; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 16px 20px; border: 0; background: white; color: var(--text); text-align: left; font-weight: 800; }
.faq-question::after { content: '+'; color: var(--brand); font-size: 24px; }
.faq-question[aria-expanded="true"]::after { content: '−'; }
.faq-answer { padding: 0 20px 19px; }
.faq-answer p { margin: 0; }
.download-cta { padding: 56px; border-radius: var(--radius-xl); background: radial-gradient(circle at 15% 20%, rgba(255,255,255,.18), transparent 30%), linear-gradient(135deg, var(--brand), var(--brand-deep)); color: white; text-align: center; }
.download-cta p { max-width: 700px; margin-left: auto; margin-right: auto; color: #eaf2ff; }
.download-cta .button-secondary { border-color: white; }

.inner-hero { padding: 82px 0 66px; background: radial-gradient(circle at 88% 18%, #dceaff, rgba(220,234,255,0) 31%), linear-gradient(180deg, white, var(--brand-pale)); }
.inner-hero-grid { display: grid; grid-template-columns: 1.12fr .88fr; gap: 42px; align-items: center; }
.inner-hero h1 { font-size: clamp(38px, 5.5vw, 64px); }
.inner-hero-visual { min-height: 360px; display: grid; place-items: center; }
.inner-hero-visual img { max-height: 370px; object-fit: contain; filter: drop-shadow(0 18px 34px rgba(40,90,150,.15)); }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; color: var(--muted); font-size: 14px; }
.breadcrumb a { color: var(--brand-deep); }
.content-grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.info-card { padding: 28px; border-radius: 20px; border: 1px solid var(--border); background: white; }
.info-card .card-index { display: inline-flex; margin-bottom: 16px; color: var(--brand); font-weight: 900; font-size: 12px; letter-spacing: .1em; }
.info-card p:last-child { margin-bottom: 0; }
.rich-text { max-width: 850px; }
.rich-text h2 { margin-top: 48px; font-size: 32px; }
.rich-text h3 { margin-top: 30px; }
.rich-text ul, .rich-text ol { color: var(--body); padding-left: 24px; }
.rich-text li + li { margin-top: 9px; }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 18px; background: white; }
table { width: 100%; border-collapse: collapse; min-width: 680px; }
th, td { padding: 16px 18px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
th { background: var(--brand-pale); color: var(--text); }
tr:last-child td { border-bottom: 0; }
.timeline { position: relative; display: grid; gap: 18px; }
.timeline::before { content: ''; position: absolute; left: 17px; top: 12px; bottom: 12px; width: 2px; background: #cfe0f8; }
.timeline-item { position: relative; padding: 0 0 0 54px; }
.timeline-item::before { content: ''; position: absolute; left: 9px; top: 7px; width: 18px; height: 18px; border-radius: 50%; background: var(--brand); box-shadow: 0 0 0 7px var(--brand-soft); }
.callout { padding: 28px 30px; border-left: 4px solid var(--brand); border-radius: 0 18px 18px 0; background: var(--brand-pale); }
.callout.warning { border-left-color: #d68717; background: #fff8e9; }
.callout p:last-child { margin-bottom: 0; }
.steps-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; counter-reset: steps; }
.step-card { position: relative; padding: 30px; border-radius: 20px; background: white; border: 1px solid var(--border); }
.step-card::before { counter-increment: steps; content: counter(steps, decimal-leading-zero); display: block; margin-bottom: 18px; color: var(--brand); font-size: 14px; font-weight: 900; letter-spacing: .1em; }
.related-panel { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding: 36px; border-radius: 22px; background: var(--brand-pale); border: 1px solid #d7e7fb; }
.related-panel p { margin-bottom: 0; }

.site-footer { background: var(--footer); color: white; }
.footer-inner { width: min(var(--container), calc(100% - 40px)); margin: 0 auto; padding: 62px 0 42px; display: grid; grid-template-columns: 1.1fr 1.4fr; gap: 70px; }
.footer-brand p { max-width: 470px; margin-top: 20px; color: #c9d8ec; }
.footer-links { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; }
.footer-links div { display: flex; flex-direction: column; gap: 9px; }
.footer-links strong { margin-bottom: 5px; }
.footer-links a { color: #c9d8ec; }
.footer-links a:hover { color: white; }
.footer-bottom { width: min(var(--container), calc(100% - 40px)); margin: 0 auto; padding: 20px 0 28px; display: flex; justify-content: space-between; gap: 24px; border-top: 1px solid rgba(255,255,255,.12); color: #aebfd5; font-size: 13px; }

@media (max-width: 1120px) {
  .header-inner { grid-template-columns: 160px minmax(0,1fr) auto; gap: 12px; }
  .desktop-nav > a, .nav-group > a { padding: 0 7px; font-size: 14px; }
  .more-toggle { display: none; }
  .process { grid-template-columns: repeat(3,1fr); row-gap: 34px; }
}

@media (max-width: 980px) {
  .desktop-nav, .more-toggle { display: none; }
  .header-inner { grid-template-columns: 1fr auto; }
  .mobile-menu-toggle { display: inline-flex; }
  .hero-grid, .inner-hero-grid, .feature-panel, .hardware-grid, .safety-layout, .swap-grid { grid-template-columns: 1fr; }
  .hero-visual { min-height: 470px; }
  .capability-strip { grid-template-columns: 1fr 1fr; }
  .capability-item:nth-child(3) { border-left: 0; border-top: 1px solid var(--border); }
  .capability-item:nth-child(4) { border-top: 1px solid var(--border); }
  .category-grid { grid-template-columns: repeat(2,1fr); }
  .category-card.featured, .category-card.wide { grid-column: span 1; }
  .split-card.offset { transform: none; }
  .dual-feature { grid-template-columns: 1fr; }
  .content-grid-3, .review-grid, .steps-grid { grid-template-columns: repeat(2,1fr); }
  .footer-inner { grid-template-columns: 1fr; gap: 34px; }
}

@media (max-width: 720px) {
  .container, .header-inner, .footer-inner, .footer-bottom { width: min(100% - 28px, var(--container)); }
  .header-inner { min-height: 68px; }
  .header-actions { gap: 6px; }
  .header-actions .button-compact { min-height: 40px; padding: 0 13px; font-size: 14px; }
  .mobile-menu-toggle { min-width: 40px; min-height: 40px; }
  .section { padding: 68px 0; }
  .section-sm { padding: 48px 0; }
  .hero { padding: 58px 0 56px; }
  .hero-grid { gap: 28px; }
  .hero-visual { min-height: 400px; }
  .float-note { max-width: 160px; padding: 10px 12px; }
  .float-note.one { left: 0; top: 9%; }
  .float-note.two { right: 0; top: 45%; }
  .float-note.three { left: 2%; bottom: 3%; }
  .actions { flex-direction: column; align-items: stretch; }
  .actions .button { width: 100%; }
  .capability-strip { grid-template-columns: 1fr; }
  .capability-item + .capability-item { border-left: 0; border-top: 1px solid var(--border); }
  .category-grid, .split-grid, .safety-grid, .content-grid-3, .review-grid, .steps-grid, .footer-links { grid-template-columns: 1fr; }
  .feature-panel { padding: 24px; gap: 28px; }
  .feature-panel .image-panel, .hardware-image { min-height: 330px; }
  .split-card, .visual-card .card-body, .content-card, .swap-checks, .swap-visual { padding: 28px; }
  .split-card .mini-list { grid-template-columns: 1fr; }
  .process { grid-template-columns: 1fr; gap: 0; }
  .process-step { padding: 18px 18px 24px 54px; border-top: 0; border-left: 2px solid #bcd4f7; }
  .process-step::before { left: -18px; top: 18px; }
  .process-step h3 { margin-top: 0; }
  .notice-item { grid-template-columns: 1fr; gap: 8px; }
  .download-cta { padding: 38px 24px; }
  .inner-hero { padding: 56px 0 48px; }
  .inner-hero-visual { min-height: 280px; }
  .related-panel { align-items: flex-start; flex-direction: column; padding: 28px; }
  .footer-bottom { flex-direction: column; gap: 8px; }
}

@media (max-width: 420px) {
  .header-inner { width: calc(100% - 20px); }
  .brand img { max-width: 118px; }
  .header-actions .button-compact { padding: 0 11px; }
  h1 { font-size: 38px; }
  .hero-visual { min-height: 360px; }
  .float-note { position: static; max-width: none; margin-top: 8px; }
  .hero-visual { display: flex; flex-direction: column; }
  .hero-visual > img { order: -1; max-height: 330px; }
}