:root {
    --brand: #2980FE;
    --brand-dark: #1767D6;
    --brand-soft: #EAF3FF;
    --ice: #F5F8FD;
    --gray: #F7F9FC;
    --white: #FFFFFF;
    --ink: #172033;
    --text: #465266;
    --muted: #718096;
    --line: #DCE6F2;
    --footer: #10233F;
    --shadow: 0 18px 50px rgba(23, 103, 214, .09);
    --radius: 24px;
    --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: 1.7; overflow-x: hidden; }
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea, select { font: inherit; }
button { color: inherit; }
.container { width: var(--container); margin-inline: auto; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 9999; padding: 10px 16px; border-radius: 12px; background: var(--footer); color: #fff; }
.skip-link:focus { top: 16px; }
.site-header { position: sticky; top: 0; z-index: 1000; background: rgba(255,255,255,.94); border-bottom: 1px solid rgba(220,230,242,.8); backdrop-filter: blur(16px); }
.header-inner { min-height: 76px; display: grid; grid-template-columns: 190px 1fr auto; align-items: center; gap: 22px; }
.brand { display: inline-flex; align-items: center; flex: 0 0 auto; }
.brand img { width: 180px; height: 45px; object-fit: contain; object-position: left center; }
.desktop-nav { display: flex; align-items: center; justify-content: center; gap: 4px; white-space: nowrap; }
.nav-item { position: relative; }
.nav-link { display: inline-flex; align-items: center; min-height: 44px; padding: 8px 11px; border-radius: 12px; color: #334158; font-size: 15px; font-weight: 700; }
.nav-link:hover, .nav-link:focus-visible, .nav-link.is-active { color: var(--brand-dark); background: var(--brand-soft); outline: none; }
.mega-menu { position: absolute; left: 50%; top: calc(100% + 14px); width: 620px; display: grid; grid-template-columns: 190px 1fr; gap: 18px; padding: 22px; border: 1px solid var(--line); border-radius: 22px; background: #fff; box-shadow: var(--shadow); opacity: 0; visibility: hidden; transform: translate(-50%, 10px); transition: .18s ease; pointer-events: none; }
.mega-menu::before { content: ""; position: absolute; left: 0; right: 0; top: -18px; height: 18px; }
.nav-item:hover .mega-menu, .nav-item:focus-within .mega-menu { opacity: 1; visibility: visible; transform: translate(-50%, 0); pointer-events: auto; }
.mega-menu-right { left: auto; right: -120px; transform: translate(0, 10px); }
.nav-item:hover .mega-menu-right, .nav-item:focus-within .mega-menu-right { transform: translate(0, 0); }
.mega-intro { padding: 18px; border-radius: 18px; background: linear-gradient(145deg, #EAF3FF, #F8FBFF); }
.mega-intro strong { display: block; margin-bottom: 8px; color: var(--brand-dark); font-size: 20px; }
.mega-intro span { display: block; color: var(--text); font-size: 14px; line-height: 1.6; }
.mega-links { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.mega-links a { padding: 10px 12px; border-radius: 13px; }
.mega-links a:hover, .mega-links a:focus-visible { background: var(--ice); outline: none; }
.mega-links b, .mega-links span { display: block; }
.mega-links b { color: var(--ink); font-size: 15px; }
.mega-links span { color: var(--muted); font-size: 12px; }
.header-actions { display: flex; align-items: center; justify-content: flex-end; gap: 10px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 12px 22px; border: 1px solid transparent; border-radius: 14px; font-weight: 800; transition: transform .16s ease, box-shadow .16s ease, background .16s ease; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: linear-gradient(135deg, var(--brand), var(--brand-dark)); color: #fff; box-shadow: 0 12px 28px rgba(41,128,254,.22); }
.btn-secondary { background: #fff; color: var(--brand-dark); border-color: var(--line); }
.btn-ghost { background: transparent; color: var(--brand-dark); border-color: rgba(41,128,254,.28); }
.btn-compact { min-height: 42px; padding: 9px 16px; font-size: 14px; white-space: nowrap; }
.more-wrap { position: relative; }
.icon-btn, .mobile-menu-toggle { min-width: 44px; min-height: 44px; border: 1px solid var(--line); border-radius: 13px; background: #fff; cursor: pointer; }
.more-toggle { display: flex; align-items: center; gap: 8px; padding: 0 12px; font-size: 13px; font-weight: 800; }
.more-toggle i { width: 5px; height: 5px; border-radius: 50%; background: var(--brand); box-shadow: 8px 0 var(--brand), 16px 0 var(--brand); margin-right: 16px; }
.more-menu { position: absolute; right: 0; top: calc(100% + 10px); width: 170px; padding: 8px; border: 1px solid var(--line); border-radius: 16px; background: #fff; box-shadow: var(--shadow); opacity: 0; visibility: hidden; transform: translateY(8px); transition: .18s ease; }
.more-menu.is-open { opacity: 1; visibility: visible; transform: none; }
.more-menu a { display: block; padding: 10px 12px; border-radius: 10px; font-weight: 700; font-size: 14px; }
.more-menu a:hover { background: var(--ice); color: var(--brand-dark); }
.mobile-menu-toggle { display: none; padding: 10px; }
.mobile-menu-toggle span { display: block; width: 22px; height: 2px; margin: 4px auto; border-radius: 2px; background: var(--ink); }
.menu-overlay { position: fixed; inset: 0; z-index: 1100; background: rgba(16,35,63,.42); opacity: 0; transition: opacity .22s ease; }
.menu-overlay.is-visible { opacity: 1; }
.mobile-menu { position: fixed; top: 0; right: 0; bottom: 0; z-index: 1200; width: min(440px, 92vw); padding: 20px; background: #fff; transform: translateX(105%); transition: transform .24s ease; overflow-y: auto; }
.mobile-menu.is-open { transform: translateX(0); }
.mobile-menu-head { display: flex; justify-content: space-between; align-items: center; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.mobile-menu-close { width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 13px; background: #fff; font-size: 30px; line-height: 1; cursor: pointer; }
.mobile-menu nav { margin-top: 14px; }
.mobile-home, .mobile-group > button { width: 100%; min-height: 52px; display: flex; align-items: center; justify-content: space-between; padding: 12px 6px; border: 0; border-bottom: 1px solid var(--line); background: transparent; font-weight: 800; text-align: left; cursor: pointer; }
.mobile-group > div { display: none; padding: 8px 0 12px 14px; }
.mobile-group.is-open > div { display: grid; grid-template-columns: repeat(2, 1fr); gap: 6px; }
.mobile-group > div a { min-height: 44px; display: flex; align-items: center; padding: 8px 10px; border-radius: 10px; background: var(--ice); color: var(--text); font-size: 14px; }
.mobile-menu-download { width: 100%; margin-top: 18px; }
main { min-height: 60vh; }
.section { padding: 92px 0; }
.section-sm { padding: 64px 0; }
.bg-soft { background: var(--ice); }
.bg-blue { background: linear-gradient(145deg, #EAF3FF, #F8FBFF); }
.bg-deep { background: linear-gradient(145deg, #102C54, #1767D6); color: #fff; }
.section-head { max-width: 760px; margin-bottom: 36px; }
.section-head.center { margin-inline: auto; text-align: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 14px; color: var(--brand-dark); font-size: 13px; font-weight: 900; letter-spacing: .08em; }
.eyebrow::before { content: ""; width: 26px; height: 2px; border-radius: 2px; background: var(--brand); }
.bg-deep .eyebrow { color: #BFD8FF; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 22px; font-size: clamp(38px, 5vw, 68px); line-height: 1.08; letter-spacing: -.035em; }
h2 { margin-bottom: 18px; font-size: clamp(28px, 3.5vw, 44px); line-height: 1.18; letter-spacing: -.025em; }
h3 { margin-bottom: 10px; font-size: 21px; line-height: 1.32; }
p { color: var(--text); }
.bg-deep p { color: #DDEBFF; }
.lead { font-size: clamp(17px, 2vw, 20px); line-height: 1.8; }
.text-link { color: var(--brand-dark); font-weight: 800; }
.text-link:hover { text-decoration: underline; }
.button-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.tag-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.tag { padding: 7px 12px; border: 1px solid rgba(41,128,254,.18); border-radius: 999px; background: rgba(234,243,255,.78); color: var(--brand-dark); font-size: 13px; font-weight: 800; }
.hero { position: relative; padding: 76px 0 58px; overflow: hidden; background: radial-gradient(circle at 85% 12%, rgba(41,128,254,.16), transparent 35%), linear-gradient(180deg, #FBFDFF, #F4F8FF); }
.hero::after { content: ""; position: absolute; width: 460px; height: 460px; right: -250px; bottom: -280px; border: 1px solid rgba(41,128,254,.2); border-radius: 50%; box-shadow: 0 0 0 54px rgba(41,128,254,.035), 0 0 0 108px rgba(41,128,254,.025); }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; }
.hero-copy { max-width: 680px; }
.hero-visual { position: relative; min-height: 540px; display: grid; place-items: center; }
.hero-visual .product-image { width: min(100%, 470px); filter: drop-shadow(0 28px 36px rgba(23,103,214,.18)); }
.float-note { position: absolute; max-width: 190px; padding: 14px 16px; border: 1px solid rgba(220,230,242,.9); border-radius: 16px; background: rgba(255,255,255,.91); box-shadow: var(--shadow); backdrop-filter: blur(10px); font-size: 13px; font-weight: 800; color: var(--ink); }
.float-note::before { content: ""; display: inline-block; width: 8px; height: 8px; margin-right: 8px; border-radius: 50%; background: var(--brand); }
.float-note.one { left: 0; top: 80px; }
.float-note.two { right: 0; top: 190px; }
.float-note.three { left: 24px; bottom: 72px; }
.capability-strip { position: relative; z-index: 2; margin-top: -18px; }
.capability-grid { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); border-radius: 24px; background: #fff; box-shadow: var(--shadow); overflow: hidden; }
.capability-item { padding: 24px; }
.capability-item + .capability-item { border-left: 1px solid var(--line); }
.capability-item strong { display: block; margin-bottom: 8px; color: var(--ink); }
.capability-item p { margin-bottom: 0; font-size: 14px; }
.category-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; grid-auto-flow: dense; }
.category-card { position: relative; min-height: 220px; padding: 26px; border: 1px solid var(--line); border-radius: 22px; background: #fff; overflow: hidden; transition: transform .18s ease, box-shadow .18s ease; }
.category-card::after { content: ""; position: absolute; right: -42px; bottom: -42px; width: 120px; height: 120px; border-radius: 50%; background: var(--brand-soft); }
.category-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.category-card.wide { grid-column: span 2; }
.category-card.tall { grid-row: span 2; min-height: 458px; background: linear-gradient(155deg, #1767D6, #2980FE); color: #fff; }
.category-card.tall p, .category-card.tall .text-link { color: #E8F1FF; }
.category-card .category-no { display: inline-grid; place-items: center; width: 38px; height: 38px; margin-bottom: 34px; border-radius: 12px; background: var(--brand-soft); color: var(--brand-dark); font-weight: 900; }
.category-card.tall .category-no { background: rgba(255,255,255,.16); color: #fff; }
.category-card p { position: relative; z-index: 1; }
.category-card .text-link { position: absolute; left: 26px; bottom: 24px; z-index: 2; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.split.reverse > :first-child { order: 2; }
.media-panel { position: relative; min-height: 480px; display: grid; place-items: center; padding: 36px; border-radius: 28px; background: linear-gradient(145deg, #DDEBFF, #F8FBFF); overflow: hidden; }
.media-panel img { max-height: 430px; object-fit: contain; filter: drop-shadow(0 22px 28px rgba(23,103,214,.14)); }
.content-panel { padding: 36px; border: 1px solid var(--line); border-radius: 24px; background: #fff; box-shadow: 0 14px 44px rgba(23,103,214,.07); }
.check-list, .plain-list { list-style: none; margin: 22px 0 0; padding: 0; }
.check-list li { position: relative; padding: 10px 0 10px 34px; border-bottom: 1px solid var(--line); color: var(--text); }
.check-list li:last-child { border-bottom: 0; }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 10px; display: grid; place-items: center; width: 22px; height: 22px; border-radius: 8px; background: var(--brand-soft); color: var(--brand-dark); font-size: 13px; font-weight: 900; }
.duo-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 22px; }
.duo-card { padding: 36px; border-radius: 26px; background: #fff; border: 1px solid var(--line); }
.duo-card.offset { margin-top: 54px; background: linear-gradient(145deg, #EAF3FF, #FFFFFF); }
.metric-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 24px; }
.metric { padding: 18px; border-radius: 16px; background: var(--ice); }
.metric b, .metric span { display: block; }
.metric b { color: var(--brand-dark); }
.metric span { color: var(--muted); font-size: 13px; }
.security-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 28px; align-items: stretch; }
.security-main { padding: 46px; border: 1px solid rgba(255,255,255,.18); border-radius: 28px; background: rgba(255,255,255,.08); }
.security-points { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.security-point { padding: 18px; border: 1px solid rgba(255,255,255,.16); border-radius: 17px; background: rgba(255,255,255,.07); }
.security-point strong { display: block; margin-bottom: 6px; }
.security-point span { color: #DDEBFF; font-size: 14px; }
.security-alert { display: flex; flex-direction: column; justify-content: center; padding: 34px; border-radius: 28px; background: #fff; color: var(--ink); }
.security-alert p { color: var(--text); }
.swap-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 40px; align-items: center; }
.swap-image { padding: 28px; border-radius: 28px; background: linear-gradient(145deg, #EAF3FF, #F7FAFF); }
.swap-image img { max-height: 460px; margin: auto; object-fit: contain; }
.number-list { counter-reset: item; display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.number-list li { counter-increment: item; display: grid; grid-template-columns: 42px 1fr; align-items: start; gap: 12px; padding: 13px 0; border-bottom: 1px solid var(--line); color: var(--text); }
.number-list li::before { content: counter(item); display: grid; place-items: center; width: 38px; height: 38px; border-radius: 12px; background: var(--brand-soft); color: var(--brand-dark); font-weight: 900; }
.process { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; }
.process-step { position: relative; padding: 26px 18px 22px; border: 1px solid var(--line); border-radius: 20px; background: #fff; }
.process-step::after { content: ""; position: absolute; top: 38px; right: -15px; width: 16px; height: 2px; background: var(--line); }
.process-step:last-child::after { display: none; }
.process-step .step-no { display: grid; place-items: center; width: 38px; height: 38px; margin-bottom: 18px; border-radius: 50%; background: var(--brand); color: #fff; font-weight: 900; }
.process-step p { font-size: 14px; }
.timeline { position: relative; display: grid; gap: 0; }
.timeline::before { content: ""; position: absolute; left: 104px; top: 10px; bottom: 10px; width: 1px; background: var(--line); }
.timeline-item { display: grid; grid-template-columns: 82px 1fr; gap: 42px; padding: 20px 0; }
.timeline-date { color: var(--brand-dark); font-size: 13px; font-weight: 900; }
.timeline-content { position: relative; padding: 22px 24px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.timeline-content::before { content: ""; position: absolute; left: -49px; top: 28px; width: 12px; height: 12px; border: 4px solid #fff; border-radius: 50%; background: var(--brand); box-shadow: 0 0 0 1px var(--line); }
.review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.review { padding: 26px; border: 1px solid var(--line); border-radius: 20px; background: #fff; }
.review:nth-child(2), .review:nth-child(5) { transform: translateY(18px); }
.review p { margin-bottom: 14px; }
.review span { color: var(--muted); font-size: 13px; font-weight: 800; }
.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: 68px; display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 18px 0; border: 0; background: transparent; text-align: left; font-weight: 900; cursor: pointer; }
.faq-question::after { content: "+"; flex: 0 0 auto; display: grid; place-items: center; width: 32px; height: 32px; border-radius: 10px; background: var(--brand-soft); color: var(--brand-dark); font-size: 21px; }
.faq-item.is-open .faq-question::after { content: "−"; }
.faq-answer { display: none; padding: 0 48px 22px 0; }
.faq-item.is-open .faq-answer { display: block; }
.faq-answer p { margin-bottom: 0; }
.download-cta { position: relative; overflow: hidden; padding: 58px; border-radius: 30px; background: linear-gradient(135deg, #1767D6, #2980FE); color: #fff; text-align: center; }
.download-cta::before, .download-cta::after { content: ""; position: absolute; border: 1px solid rgba(255,255,255,.18); border-radius: 50%; }
.download-cta::before { width: 240px; height: 240px; left: -100px; top: -150px; }
.download-cta::after { width: 340px; height: 340px; right: -170px; bottom: -230px; }
.download-cta > * { position: relative; z-index: 1; }
.download-cta p { max-width: 700px; margin-inline: auto; color: #E7F0FF; }
.download-cta .btn-secondary { border-color: transparent; }
.inner-hero { position: relative; padding: 76px 0 68px; background: radial-gradient(circle at 80% 20%, rgba(41,128,254,.17), transparent 34%), linear-gradient(180deg, #FBFDFF, #F4F8FF); overflow: hidden; }
.inner-hero-grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: 48px; align-items: center; }
.inner-hero-copy { max-width: 720px; }
.inner-hero h1 { font-size: clamp(40px, 5vw, 62px); }
.inner-hero-visual { min-height: 400px; display: grid; place-items: center; padding: 28px; border-radius: 28px; background: rgba(255,255,255,.62); border: 1px solid rgba(220,230,242,.8); }
.inner-hero-visual img { max-height: 390px; object-fit: contain; }
.topic-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.topic-card { padding: 26px; border: 1px solid var(--line); border-radius: 20px; background: #fff; }
.topic-card:nth-child(2n) { background: var(--ice); }
.topic-card .mini-no { display: inline-grid; place-items: center; width: 34px; height: 34px; margin-bottom: 18px; border-radius: 11px; background: var(--brand-soft); color: var(--brand-dark); font-weight: 900; }
.guide-layout { display: grid; grid-template-columns: 280px 1fr; gap: 36px; align-items: start; }
.guide-nav { position: sticky; top: 100px; padding: 22px; border: 1px solid var(--line); border-radius: 20px; background: #fff; }
.guide-nav h2 { font-size: 18px; }
.guide-nav a { display: block; padding: 9px 10px; border-radius: 10px; color: var(--text); font-size: 14px; font-weight: 700; }
.guide-nav a:hover { background: var(--ice); color: var(--brand-dark); }
.guide-content { display: grid; gap: 20px; }
.guide-block { scroll-margin-top: 110px; padding: 32px; border: 1px solid var(--line); border-radius: 22px; background: #fff; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 18px; }
table { width: 100%; border-collapse: collapse; min-width: 680px; }
th, td { padding: 16px 18px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { background: var(--ice); color: var(--ink); }
td { color: var(--text); }
.notice { padding: 22px 24px; border-left: 4px solid var(--brand); border-radius: 4px 18px 18px 4px; background: var(--brand-soft); }
.notice strong { display: block; margin-bottom: 6px; color: var(--brand-dark); }
.notice p { margin-bottom: 0; }
.feature-band { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.feature-band article { padding: 22px; border-radius: 18px; background: var(--ice); }
.feature-band article:nth-child(2), .feature-band article:nth-child(4) { background: var(--brand-soft); }
.form-shell { display: grid; grid-template-columns: .8fr 1.2fr; gap: 28px; }
.support-categories { display: grid; gap: 12px; }
.support-categories article { padding: 22px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.contact-note { padding: 32px; border-radius: 24px; background: linear-gradient(145deg, #EAF3FF, #F8FBFF); }
.policy-content { max-width: 900px; margin: 0 auto; }
.policy-content section { padding: 30px 0; border-bottom: 1px solid var(--line); }
.policy-content h2 { font-size: 28px; }
.site-footer { padding: 64px 0 22px; background: var(--footer); color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 42px; }
.footer-brand p { max-width: 390px; margin-top: 18px; color: #B9C8DC; }
.site-footer h2 { margin-bottom: 16px; color: #fff; font-size: 15px; }
.site-footer a { display: block; margin: 8px 0; color: #C7D3E3; font-size: 14px; }
.site-footer a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; gap: 20px; margin-top: 42px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.12); }
.footer-bottom p { margin: 0; color: #9EB0C7; font-size: 13px; }
.footer-bottom div { display: flex; gap: 18px; }
.footer-bottom a { margin: 0; font-size: 13px; }
@media (max-width: 1120px) {
    .header-inner { grid-template-columns: 170px 1fr auto; gap: 10px; }
    .brand img { width: 160px; }
    .nav-link { padding-inline: 8px; font-size: 14px; }
    .more-wrap { display: none; }
    .process { grid-template-columns: repeat(3, 1fr); }
    .process-step:nth-child(3)::after, .process-step:last-child::after { display: none; }
}
@media (max-width: 960px) {
    :root { --container: min(100% - 32px, 760px); }
    .desktop-nav, .more-wrap { display: none; }
    .header-inner { grid-template-columns: 1fr auto; }
    .header-actions { gap: 8px; }
    .mobile-menu-toggle { display: block; }
    .hero-grid, .inner-hero-grid, .split, .duo-grid, .security-grid, .swap-grid, .form-shell { grid-template-columns: 1fr; }
    .hero-copy { max-width: none; }
    .hero-visual { min-height: 500px; }
    .split.reverse > :first-child { order: 0; }
    .capability-grid { grid-template-columns: repeat(2, 1fr); }
    .capability-item:nth-child(3) { border-left: 0; border-top: 1px solid var(--line); }
    .capability-item:nth-child(4) { border-top: 1px solid var(--line); }
    .category-grid { grid-template-columns: repeat(2, 1fr); }
    .category-card.tall { grid-row: span 1; min-height: 260px; }
    .category-card.wide { grid-column: span 1; }
    .duo-card.offset { margin-top: 0; }
    .review-grid, .topic-grid { grid-template-columns: repeat(2, 1fr); }
    .review:nth-child(2), .review:nth-child(5) { transform: none; }
    .guide-layout { grid-template-columns: 1fr; }
    .guide-nav { position: static; display: flex; flex-wrap: wrap; gap: 4px; }
    .guide-nav h2 { width: 100%; }
    .feature-band { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1.3fr 1fr 1fr; }
    .footer-grid > div:last-child { grid-column: 2 / -1; }
}
@media (max-width: 680px) {
    :root { --container: min(100% - 24px, 560px); --radius: 20px; }
    .site-header { backdrop-filter: blur(10px); }
    .header-inner { min-height: 66px; }
    .brand img { width: 138px; height: 38px; }
    .header-actions .btn-compact { min-height: 40px; padding: 8px 12px; font-size: 13px; }
    .section { padding: 68px 0; }
    .section-sm { padding: 50px 0; }
    h1 { font-size: clamp(36px, 12vw, 50px); }
    h2 { font-size: 30px; }
    .hero { padding-top: 56px; }
    .hero-grid { gap: 20px; }
    .hero-visual { min-height: 390px; }
    .hero-visual .product-image { width: 86%; }
    .float-note { position: static; max-width: none; padding: 11px 12px; }
    .hero-visual { grid-template-columns: repeat(2, 1fr); gap: 8px; align-content: center; }
    .hero-visual .product-image { grid-column: 1 / -1; }
    .float-note.three { grid-column: 1 / -1; }
    .capability-strip { margin-top: 0; padding-top: 16px; }
    .capability-grid, .category-grid, .review-grid, .topic-grid, .feature-band { grid-template-columns: 1fr; }
    .capability-item + .capability-item { border-left: 0; border-top: 1px solid var(--line); }
    .category-card, .category-card.tall { min-height: 238px; }
    .content-panel, .duo-card, .security-main, .security-alert, .guide-block { padding: 25px; }
    .media-panel { min-height: 360px; padding: 22px; }
    .security-points, .metric-row { grid-template-columns: 1fr; }
    .process { grid-template-columns: 1fr; }
    .process-step::after { display: none; }
    .timeline::before { left: 10px; }
    .timeline-item { grid-template-columns: 1fr; gap: 8px; padding-left: 30px; }
    .timeline-content::before { left: -27px; top: 26px; }
    .timeline-date { padding-left: 0; }
    .download-cta { padding: 42px 22px; }
    .inner-hero { padding: 56px 0 50px; }
    .inner-hero-grid { gap: 24px; }
    .inner-hero-visual { min-height: 300px; padding: 18px; }
    .inner-hero-visual img { max-height: 290px; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px 20px; }
    .footer-brand { grid-column: 1 / -1; }
    .footer-grid > div:last-child { grid-column: auto; }
    .footer-bottom { align-items: flex-start; flex-direction: column; }
    .footer-bottom div { flex-wrap: wrap; }
}