:root {
  --blue: #2980FE;
  --blue-deep: #1767D6;
  --blue-pale: #EAF3FF;
  --blue-faint: #F5F8FD;
  --gray: #F7F9FC;
  --white: #FFFFFF;
  --ink: #172033;
  --body: #465266;
  --muted: #718096;
  --line: #DCE6F2;
  --footer: #10233F;
  --shadow: 0 18px 50px rgba(26, 74, 132, .10);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --container: min(1180px, calc(100% - 40px));
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--white); 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; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
.skip-link { position: fixed; left: 20px; top: -80px; z-index: 1000; padding: 12px 18px; background: var(--ink); color: #fff; border-radius: 12px; }
.skip-link:focus { top: 20px; }
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.93); backdrop-filter: blur(16px); border-bottom: 1px solid rgba(220,230,242,.78); }
.nav-shell { width: min(1320px, calc(100% - 28px)); min-height: 76px; margin: 0 auto; display: flex; align-items: center; gap: 20px; }
.brand { display: inline-flex; align-items: center; flex: 0 0 auto; }
.brand img { width: 172px; max-height: 45px; object-fit: contain; }
.desktop-nav { display: flex; align-items: center; justify-content: center; gap: 4px; flex: 1; min-width: 0; white-space: nowrap; }
.nav-link, .nav-trigger { min-height: 44px; padding: 0 12px; display: inline-flex; align-items: center; justify-content: center; border: 0; background: transparent; color: var(--body); border-radius: 12px; cursor: pointer; font-weight: 650; font-size: 15px; }
.nav-link:hover, .nav-trigger:hover, .nav-link.is-active, .nav-group.is-active > .nav-trigger, .nav-group:focus-within > .nav-trigger { color: var(--blue-deep); background: var(--blue-pale); }
.nav-trigger::after { content: ""; width: 7px; height: 7px; margin-left: 8px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor; transform: rotate(45deg) translateY(-2px); transition: transform .2s ease; }
.nav-group { position: relative; }
.nav-group:hover .mega-menu, .nav-group:focus-within .mega-menu, .nav-group.is-open .mega-menu { opacity: 1; visibility: visible; transform: translate(-50%, 0); pointer-events: auto; }
.nav-group:hover .nav-trigger::after, .nav-group.is-open .nav-trigger::after { transform: rotate(225deg) translate(-2px, -1px); }
.mega-menu { position: absolute; left: 50%; top: calc(100% + 14px); width: min(680px, 86vw); padding: 20px; display: grid; grid-template-columns: 210px 1fr; gap: 18px; background: rgba(255,255,255,.99); border: 1px solid var(--line); border-radius: 22px; box-shadow: var(--shadow); opacity: 0; visibility: hidden; transform: translate(-50%, 10px); transition: .2s ease; pointer-events: none; white-space: normal; }
.mega-menu::before { content: ""; position: absolute; left: 0; right: 0; top: -18px; height: 18px; }
.mega-intro { padding: 20px; border-radius: 17px; background: linear-gradient(145deg, var(--blue), var(--blue-deep)); color: #fff; }
.mega-intro strong { display: block; font-size: 20px; margin-bottom: 8px; }
.mega-intro span { display: block; color: rgba(255,255,255,.82); font-size: 14px; line-height: 1.7; }
.mega-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.mega-links a { padding: 13px 14px; border-radius: 14px; border: 1px solid transparent; }
.mega-links a:hover, .mega-links a:focus { background: var(--blue-faint); border-color: var(--line); }
.mega-links strong, .mega-links span { display: block; }
.mega-links strong { color: var(--ink); font-size: 15px; }
.mega-links span { color: var(--muted); font-size: 12px; margin-top: 3px; }
.nav-actions { display: flex; align-items: center; gap: 9px; flex: 0 0 auto; }
.download-btn { min-height: 48px; padding: 0 24px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--blue); border-radius: 999px; background: linear-gradient(135deg, var(--blue), var(--blue-deep)); color: #fff; font-weight: 750; box-shadow: 0 12px 28px rgba(41,128,254,.24); transition: transform .2s ease, box-shadow .2s ease; }
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgba(41,128,254,.3); }
.download-btn.compact { min-height: 44px; padding: 0 19px; font-size: 14px; }
.more-button { width: 44px; height: 44px; display: none; align-items: center; justify-content: center; flex-direction: column; gap: 5px; border: 1px solid var(--line); border-radius: 14px; background: #fff; cursor: pointer; }
.more-button span { width: 19px; height: 2px; background: var(--ink); border-radius: 9px; }
.menu-overlay { position: fixed; inset: 0; z-index: 140; background: rgba(16,35,63,.42); opacity: 0; transition: opacity .2s ease; }
.menu-overlay.is-open { opacity: 1; }
.mobile-menu { position: fixed; inset: 0 0 0 auto; z-index: 150; width: min(440px, 94vw); display: flex; flex-direction: column; background: #fff; transform: translateX(103%); transition: transform .25s ease; box-shadow: -28px 0 70px rgba(16,35,63,.18); }
.mobile-menu.is-open { transform: translateX(0); }
.mobile-menu-head { min-height: 76px; padding: 12px 18px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.menu-close { width: 46px; height: 46px; border: 0; border-radius: 50%; background: var(--blue-pale); color: var(--blue-deep); font-size: 30px; cursor: pointer; }
.mobile-menu-body { padding: 18px; overflow-y: auto; }
.mobile-home, .mobile-menu summary, .mobile-menu details a { min-height: 48px; display: flex; align-items: center; border-radius: 13px; }
.mobile-home { padding: 0 15px; margin-bottom: 8px; background: var(--blue-faint); font-weight: 700; }
.mobile-menu details { border-bottom: 1px solid var(--line); }
.mobile-menu summary { padding: 0 14px; font-weight: 750; cursor: pointer; list-style: none; }
.mobile-menu summary::-webkit-details-marker { display: none; }
.mobile-menu summary::after { content: "+"; margin-left: auto; color: var(--blue); font-size: 23px; }
.mobile-menu details[open] summary::after { content: "−"; }
.mobile-menu details div { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 7px; padding: 0 10px 13px; }
.mobile-menu details a { min-height: 44px; padding: 0 11px; background: var(--gray); color: var(--body); font-size: 14px; }
.mobile-menu-foot { padding: 18px; border-top: 1px solid var(--line); }
.mobile-menu-foot .download-btn { width: 100%; }
main { min-height: 60vh; }
.container { width: var(--container); margin-inline: auto; }
.section { padding: 104px 0; }
.section-sm { padding: 76px 0; }
.section-blue { background: var(--blue-faint); }
.section-gradient { background: linear-gradient(135deg, #f8fbff 0%, #eaf3ff 52%, #fff 100%); }
.section-darkblue { color: #fff; background: linear-gradient(135deg, #102f5f, #1767D6); }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--blue-deep); font-size: 13px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 24px; height: 2px; background: currentColor; border-radius: 9px; }
.eyebrow.light { color: #8ec1ff; }
.section-heading { max-width: 780px; margin-bottom: 42px; }
.section-heading.center { margin-inline: auto; text-align: center; }
.section-heading h2 { margin: 10px 0 14px; font-size: clamp(30px, 4vw, 50px); line-height: 1.18; letter-spacing: -.035em; }
.section-heading p { margin: 0; color: var(--body); font-size: 17px; }
.section-darkblue .section-heading p { color: rgba(255,255,255,.75); }
.hero { position: relative; overflow: hidden; padding: 94px 0 80px; background: radial-gradient(circle at 88% 12%, rgba(41,128,254,.24), transparent 31%), linear-gradient(135deg, #fff 0%, #f6faff 48%, #eaf3ff 100%); }
.hero::after { content: ""; position: absolute; width: 420px; height: 420px; left: -180px; bottom: -280px; border: 70px solid rgba(41,128,254,.06); border-radius: 50%; }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0,1.12fr) minmax(350px,.88fr); align-items: center; gap: 56px; }
.hero-copy h1 { max-width: 760px; margin: 13px 0 20px; font-size: clamp(46px, 6vw, 76px); line-height: 1.04; letter-spacing: -.055em; }
.hero-copy > p { max-width: 710px; color: var(--body); font-size: 18px; }
.hero-actions { margin-top: 30px; display: flex; flex-wrap: wrap; gap: 12px; }
.text-btn { min-height: 48px; padding: 0 20px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--line); border-radius: 999px; background: #fff; color: var(--blue-deep); font-weight: 750; }
.text-btn:hover { border-color: var(--blue); background: var(--blue-pale); }
.hero-tags { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 25px; }
.hero-tags span { padding: 8px 13px; border: 1px solid rgba(41,128,254,.18); border-radius: 999px; background: rgba(255,255,255,.72); color: var(--blue-deep); font-size: 13px; font-weight: 700; }
.hero-visual { position: relative; min-height: 520px; display: grid; place-items: center; }
.hero-device { width: min(390px, 90%); filter: drop-shadow(0 34px 44px rgba(28,83,147,.22)); }
.float-note { position: absolute; width: 185px; padding: 15px 17px; border: 1px solid rgba(255,255,255,.7); border-radius: 17px; background: rgba(255,255,255,.88); box-shadow: var(--shadow); backdrop-filter: blur(12px); }
.float-note strong { display: block; margin-bottom: 3px; font-size: 14px; }
.float-note span { color: var(--muted); font-size: 12px; }
.float-note.one { left: 0; top: 16%; }
.float-note.two { right: -3%; top: 43%; }
.float-note.three { left: 7%; bottom: 8%; }
.capability-strip { position: relative; z-index: 5; width: var(--container); margin: -30px auto 0; padding: 24px; display: grid; grid-template-columns: repeat(4,1fr); gap: 1px; border: 1px solid var(--line); border-radius: 24px; background: #fff; box-shadow: var(--shadow); }
.capability-item { padding: 12px 22px; border-right: 1px solid var(--line); }
.capability-item:last-child { border-right: 0; }
.capability-item strong { display: block; margin-bottom: 5px; font-size: 17px; }
.capability-item p { margin: 0; color: var(--muted); font-size: 13px; }
.category-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 18px; }
.category-card { position: relative; min-height: 230px; padding: 27px; display: flex; flex-direction: column; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-md); background: #fff; transition: transform .2s ease, box-shadow .2s ease; }
.category-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.category-card::after { content: ""; position: absolute; width: 100px; height: 100px; right: -30px; bottom: -30px; border-radius: 50%; background: var(--blue-pale); }
.category-card.wide { grid-column: span 2; background: linear-gradient(135deg,#fff,#f1f7ff); }
.category-card.accent { color: #fff; background: linear-gradient(145deg,var(--blue),var(--blue-deep)); border-color: transparent; }
.category-card.accent p, .category-card.accent a { color: rgba(255,255,255,.85); }
.category-card .number { color: var(--blue); font-weight: 850; font-size: 13px; }
.category-card.accent .number { color: #bfe0ff; }
.category-card h3 { margin: 13px 0 8px; font-size: 22px; }
.category-card p { margin: 0 0 18px; color: var(--body); }
.category-card a { margin-top: auto; color: var(--blue-deep); font-weight: 750; }
.feature-panel { display: grid; grid-template-columns: .9fr 1.1fr; gap: 52px; align-items: center; padding: 54px; border-radius: var(--radius-lg); background: var(--blue-pale); }
.feature-image { min-height: 440px; display: grid; place-items: center; border-radius: 24px; background: rgba(255,255,255,.76); }
.feature-image img { max-height: 410px; object-fit: contain; }
.feature-content { padding: 12px 0; }
.feature-content h2 { margin: 10px 0 16px; font-size: clamp(32px,4vw,48px); line-height: 1.16; }
.feature-content p { color: var(--body); }
.check-list { display: grid; gap: 10px; margin: 24px 0 28px; padding: 0; list-style: none; }
.check-list li { position: relative; padding-left: 31px; 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(--blue); color: #fff; font-size: 12px; font-weight: 900; }
.button-row { display: flex; flex-wrap: wrap; gap: 11px; }
.split-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 22px; }
.info-pane { position: relative; padding: 40px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-lg); background: #fff; }
.info-pane.offset { margin-top: 54px; background: var(--blue-faint); }
.info-pane h3 { margin: 10px 0 12px; font-size: 31px; }
.info-pane p { color: var(--body); }
.link-stack { display: flex; flex-wrap: wrap; gap: 13px 20px; margin-top: 22px; }
.link-stack a { color: var(--blue-deep); font-weight: 750; }
.theme-grid { display: grid; grid-template-columns: 1.16fr .84fr; gap: 24px; align-items: stretch; }
.theme-card { padding: 44px; border-radius: var(--radius-lg); background: linear-gradient(145deg,#eaf3ff,#fff); border: 1px solid var(--line); }
.theme-card.secondary { margin-top: 80px; background: #fff; box-shadow: var(--shadow); }
.theme-card img { width: 100%; max-height: 290px; object-fit: contain; margin-bottom: 25px; }
.theme-card h3 { margin: 0 0 12px; font-size: 32px; }
.theme-card p { color: var(--body); }
.security-layout { display: grid; grid-template-columns: .95fr 1.05fr; gap: 45px; align-items: center; }
.security-cards { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 13px; }
.security-card { padding: 22px; border: 1px solid rgba(255,255,255,.16); border-radius: 18px; background: rgba(255,255,255,.08); }
.security-card strong { display: block; margin-bottom: 5px; }
.security-card span { color: rgba(255,255,255,.68); font-size: 13px; }
.media-split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.media-split.reverse .media-art { order: 2; }
.media-art { min-height: 440px; display: grid; place-items: center; border-radius: var(--radius-lg); background: linear-gradient(145deg,var(--blue-faint),var(--blue-pale)); }
.media-art img { max-height: 410px; object-fit: contain; }
.media-copy h2 { margin: 10px 0 16px; font-size: clamp(32px,4vw,48px); line-height: 1.15; }
.media-copy p { color: var(--body); }
.swap-layout { display: grid; grid-template-columns: .88fr 1.12fr; gap: 26px; }
.swap-intro, .swap-check { padding: 40px; border-radius: var(--radius-lg); }
.swap-intro { background: var(--blue-pale); }
.swap-intro img { max-height: 290px; margin: 0 auto 24px; }
.swap-check { border: 1px solid var(--line); background: #fff; }
.swap-check h3 { margin-top: 0; font-size: 29px; }
.process { display: grid; grid-template-columns: repeat(6,minmax(0,1fr)); gap: 12px; }
.process-step { position: relative; min-height: 260px; padding: 24px 20px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.process-step .step-no { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 12px; background: var(--blue); color: #fff; font-weight: 850; }
.process-step h3 { margin: 18px 0 8px; font-size: 17px; }
.process-step p { margin: 0 0 15px; color: var(--muted); font-size: 13px; }
.process-step a { color: var(--blue-deep); font-size: 13px; font-weight: 750; }
.eco-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 24px; }
.eco-card { min-height: 350px; padding: 44px; border-radius: var(--radius-lg); background: #fff; border: 1px solid var(--line); }
.eco-card.blue { color: #fff; background: linear-gradient(145deg,var(--blue),var(--blue-deep)); border: 0; }
.eco-card.blue p, .eco-card.blue li { color: rgba(255,255,255,.8); }
.eco-card h3 { margin: 0 0 12px; font-size: 31px; }
.timeline { display: grid; gap: 0; border-top: 1px solid var(--line); }
.timeline-item { display: grid; grid-template-columns: 120px 230px 1fr 100px; gap: 24px; align-items: center; padding: 24px 0; border-bottom: 1px solid var(--line); }
.timeline-item .date { color: var(--blue-deep); font-weight: 750; }
.timeline-item h3 { margin: 0; font-size: 18px; }
.timeline-item p { margin: 0; color: var(--muted); }
.timeline-item a { color: var(--blue-deep); font-weight: 750; text-align: right; }
.review-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 16px; }
.review-card { padding: 27px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.review-card .quote { color: var(--blue); font-size: 28px; font-weight: 900; line-height: 1; }
.review-card p { color: var(--body); }
.review-card span { color: var(--muted); font-size: 13px; }
.faq-list { max-width: 900px; margin: 0 auto; border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-question { width: 100%; min-height: 72px; padding: 18px 0; display: flex; align-items: center; gap: 20px; border: 0; background: transparent; color: var(--ink); text-align: left; font-weight: 750; font-size: 18px; cursor: pointer; }
.faq-question::after { content: "+"; margin-left: auto; color: var(--blue); font-size: 27px; }
.faq-question[aria-expanded="true"]::after { content: "−"; }
.faq-answer { display: none; padding: 0 48px 24px 0; color: var(--body); }
.faq-item.is-open .faq-answer { display: block; }
.cta-panel { position: relative; overflow: hidden; padding: 72px 40px; border-radius: 32px; text-align: center; color: #fff; background: linear-gradient(135deg,var(--blue),var(--blue-deep)); }
.cta-panel::before, .cta-panel::after { content: ""; position: absolute; border: 50px solid rgba(255,255,255,.08); border-radius: 50%; }
.cta-panel::before { width: 260px; height: 260px; left: -160px; top: -180px; }
.cta-panel::after { width: 340px; height: 340px; right: -220px; bottom: -250px; }
.cta-panel h2 { position: relative; margin: 0 0 12px; font-size: clamp(34px,5vw,56px); }
.cta-panel p { position: relative; max-width: 730px; margin: 0 auto 27px; color: rgba(255,255,255,.82); }
.cta-panel .download-btn { position: relative; background: #fff; color: var(--blue-deep); border-color: #fff; box-shadow: none; }
.page-hero { padding: 86px 0 68px; background: radial-gradient(circle at 85% 18%, rgba(41,128,254,.18), transparent 27%), linear-gradient(135deg,#fff,#eff6ff); }
.page-hero-grid { display: grid; grid-template-columns: 1.12fr .88fr; gap: 50px; align-items: center; }
.page-hero h1 { margin: 12px 0 17px; font-size: clamp(42px,5vw,66px); line-height: 1.06; letter-spacing: -.05em; }
.page-hero p { color: var(--body); font-size: 18px; }
.page-visual { min-height: 360px; display: grid; place-items: center; border: 1px solid rgba(41,128,254,.12); border-radius: 28px; background: rgba(255,255,255,.7); }
.page-visual img { max-height: 340px; object-fit: contain; }
.content-grid { display: grid; grid-template-columns: minmax(0,.7fr) minmax(0,1.3fr); gap: 36px; align-items: start; }
.side-nav { position: sticky; top: 105px; padding: 24px; border: 1px solid var(--line); border-radius: 19px; background: var(--blue-faint); }
.side-nav strong { display: block; margin-bottom: 12px; }
.side-nav a { display: block; padding: 10px 0; color: var(--body); border-bottom: 1px solid var(--line); }
.side-nav a:last-child { border-bottom: 0; }
.article-stack { display: grid; gap: 24px; }
.article-block { padding: 34px; border: 1px solid var(--line); border-radius: 22px; background: #fff; }
.article-block.soft { background: var(--blue-faint); }
.article-block h2 { margin: 0 0 14px; font-size: 31px; }
.article-block h3 { margin: 22px 0 8px; font-size: 21px; }
.article-block p { color: var(--body); }
.article-block ul, .article-block ol { color: var(--body); padding-left: 22px; }
.article-block li { margin: 8px 0; }
.notice { padding: 24px 26px; border-left: 4px solid var(--blue); border-radius: 0 16px 16px 0; background: var(--blue-pale); color: var(--body); }
.data-table { width: 100%; border-collapse: collapse; margin-top: 20px; }
.data-table th, .data-table td { padding: 14px 16px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.data-table th { color: var(--ink); background: var(--blue-faint); }
.data-table td { color: var(--body); }
.steps-vertical { display: grid; gap: 14px; counter-reset: step; }
.step-card { position: relative; padding: 24px 24px 24px 72px; border: 1px solid var(--line); border-radius: 17px; background: #fff; }
.step-card::before { counter-increment: step; content: counter(step); position: absolute; left: 22px; top: 22px; width: 34px; height: 34px; display: grid; place-items: center; border-radius: 11px; background: var(--blue); color: #fff; font-weight: 850; }
.step-card h3 { margin: 0 0 6px; }
.step-card p { margin: 0; }
.site-footer { color: rgba(255,255,255,.74); background: var(--footer); }
.footer-safety { width: var(--container); margin: 0 auto; padding: 58px 0 42px; display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: end; border-bottom: 1px solid rgba(255,255,255,.12); }
.footer-safety h2 { margin: 10px 0 0; color: #fff; font-size: clamp(28px,4vw,43px); line-height: 1.16; }
.footer-safety p { margin: 0; }
.footer-grid { width: var(--container); margin: 0 auto; padding: 50px 0; display: grid; grid-template-columns: 1.7fr repeat(3,1fr); gap: 44px; }
.footer-brand .brand img { filter: brightness(0) invert(1); }
.footer-brand p { max-width: 420px; }
.footer-grid h3 { margin: 0 0 14px; color: #fff; font-size: 15px; }
.footer-grid > div > a:not(.brand) { display: block; padding: 5px 0; color: rgba(255,255,255,.7); font-size: 14px; }
.footer-grid a:hover { color: #fff; }
.footer-bottom { width: var(--container); margin: 0 auto; padding: 22px 0 30px; display: flex; justify-content: space-between; gap: 20px; border-top: 1px solid rgba(255,255,255,.1); font-size: 13px; }
.footer-bottom div { display: flex; gap: 22px; }
@media (max-width: 1180px) {
  .desktop-nav { display: none; }
  .nav-shell { min-height: 70px; }
  .nav-actions { margin-left: auto; }
  .more-button { display: flex; }
  .process { grid-template-columns: repeat(3,1fr); }
}
@media (max-width: 900px) {
  :root { --container: min(100% - 28px, 720px); }
  .section { padding: 76px 0; }
  .section-sm { padding: 60px 0; }
  .hero { padding-top: 68px; }
  .hero-grid, .page-hero-grid, .feature-panel, .security-layout, .media-split, .swap-layout, .content-grid { grid-template-columns: 1fr; }
  .hero-visual { min-height: 440px; }
  .hero-device { width: min(340px, 75%); }
  .float-note.one { left: 2%; }
  .float-note.two { right: 2%; }
  .capability-strip { grid-template-columns: repeat(2,1fr); }
  .capability-item:nth-child(2) { border-right: 0; }
  .capability-item:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .category-grid { grid-template-columns: repeat(2,1fr); }
  .category-card.wide { grid-column: span 1; }
  .feature-panel { padding: 34px; }
  .feature-image { min-height: 360px; }
  .theme-grid { grid-template-columns: 1fr; }
  .theme-card.secondary, .info-pane.offset { margin-top: 0; }
  .media-split.reverse .media-art { order: 0; }
  .timeline-item { grid-template-columns: 110px 1fr; }
  .timeline-item p { grid-column: 2; }
  .timeline-item a { grid-column: 2; text-align: left; }
  .review-grid { grid-template-columns: repeat(2,1fr); }
  .footer-safety, .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: span 2; }
  .side-nav { position: static; }
}
@media (max-width: 620px) {
  :root { --container: calc(100% - 24px); }
  .brand img { width: 138px; }
  .download-btn.compact { min-height: 42px; padding: 0 15px; }
  .nav-shell { width: calc(100% - 20px); gap: 10px; }
  .hero { padding: 54px 0 58px; }
  .hero-copy h1 { font-size: clamp(40px,13vw,58px); }
  .hero-copy > p, .page-hero p { font-size: 16px; }
  .hero-actions .download-btn, .hero-actions .text-btn { width: 100%; }
  .hero-visual { min-height: 390px; margin-top: 18px; }
  .hero-device { width: 70%; }
  .float-note { width: 150px; padding: 11px 12px; }
  .float-note span { font-size: 11px; }
  .float-note.one { top: 11%; }
  .float-note.two { top: 44%; }
  .float-note.three { left: 2%; bottom: 4%; }
  .capability-strip { margin-top: 0; padding: 12px; border-radius: 18px; }
  .capability-item { padding: 15px 12px; }
  .capability-item strong { font-size: 15px; }
  .capability-item p { font-size: 12px; }
  .category-grid, .split-grid, .security-cards, .eco-grid, .review-grid, .footer-safety, .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
  .category-card { min-height: 210px; }
  .feature-panel, .info-pane, .theme-card, .swap-intro, .swap-check, .eco-card, .article-block { padding: 27px; }
  .feature-image, .media-art { min-height: 320px; }
  .process { grid-template-columns: 1fr; }
  .process-step { min-height: 0; }
  .timeline-item { grid-template-columns: 1fr; gap: 7px; }
  .timeline-item p, .timeline-item a { grid-column: 1; }
  .cta-panel { padding: 52px 22px; }
  .page-hero { padding: 62px 0 48px; }
  .page-visual { min-height: 300px; }
  .data-table { display: block; overflow-x: auto; }
  .footer-bottom { flex-direction: column; }
  .footer-bottom div { flex-wrap: wrap; }
}