:root {
    --teal: #2F8F83;
    --teal-dark: #23766d;
    --apricot: #F2B36F;
    --ink: #243331;
    --body: #2E3836;
    --muted: #71807C;
    --accent: #E96B4C;
    --paper: #FAFCFA;
    --soft: #EEF5F2;
    --line: #D8E5E1;
    --white: #FFFFFF;
    --shadow: 0 20px 55px rgba(36, 51, 49, .10);
    --shadow-soft: 0 12px 35px rgba(36, 51, 49, .07);
    --radius-xl: 34px;
    --radius-lg: 24px;
    --radius-md: 18px;
    --radius-sm: 12px;
    --shell: min(1180px, calc(100% - 40px));
    --narrow: min(840px, calc(100% - 40px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--paper); }
body {
    margin: 0;
    background: var(--paper);
    color: var(--body);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    font-size: 16px;
    line-height: 1.72;
    text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; }
button { color: inherit; }
[hidden] { display: none !important; }
::selection { background: rgba(47, 143, 131, .18); }
:focus-visible { outline: 3px solid rgba(233, 107, 76, .78); outline-offset: 4px; border-radius: 8px; }
.shell { width: var(--shell); margin-inline: auto; }
.narrow-shell { width: var(--narrow); }
.skip-link {
    position: fixed; left: 14px; top: 12px; z-index: 2000; transform: translateY(-160%);
    background: var(--ink); color: var(--white); padding: 10px 14px; border-radius: 10px; font-weight: 700;
}
.skip-link:focus { transform: translateY(0); }
.header-scroll-marker { position: absolute; top: 0; left: 0; width: 1px; height: 1px; pointer-events: none; }
.site-header {
    position: sticky; top: 0; z-index: 1000;
    background: rgba(250, 252, 250, .91);
    border-bottom: 1px solid transparent;
    backdrop-filter: blur(16px);
    transition: box-shadow .25s ease, border-color .25s ease, background .25s ease;
}
.site-header.is-scrolled { border-bottom-color: var(--line); box-shadow: 0 8px 30px rgba(36, 51, 49, .06); background: rgba(250, 252, 250, .97); }
.header-shell { min-height: 82px; display: flex; align-items: center; gap: 28px; }
.brand-mark { display: inline-flex; align-items: center; gap: 12px; flex: 0 0 auto; }
.brand-logo-wrap {
    width: 46px; height: 46px; border-radius: 15px; overflow: hidden; background: var(--soft); box-shadow: inset 0 0 0 1px rgba(47, 143, 131, .12);
}
.brand-logo-wrap img { width: 100%; height: 100%; object-fit: cover; }
.brand-text { display: grid; line-height: 1.25; }
.brand-text strong { font-size: 20px; color: var(--ink); letter-spacing: .02em; }
.brand-text small { color: var(--muted); margin-top: 4px; font-size: 12px; }
.desktop-nav-wrap { margin-left: auto; min-width: 0; }
.site-nav { display: flex; align-items: stretch; gap: 8px; }
.nav-link {
    display: grid; gap: 2px; padding: 10px 13px; border-radius: 14px; color: var(--muted); transition: background .2s ease, color .2s ease, transform .2s ease;
}
.nav-link span { font-size: 15px; font-weight: 800; color: var(--ink); }
.nav-link small { font-size: 11px; white-space: nowrap; }
.nav-link:hover { background: var(--soft); color: var(--teal-dark); transform: translateY(-1px); }
.nav-link.is-active { background: rgba(47, 143, 131, .11); color: var(--teal-dark); }
.nav-link.is-active span { color: var(--teal-dark); }
.menu-toggle {
    display: none; align-items: center; gap: 9px; margin-left: auto; padding: 10px 12px; border: 1px solid var(--line); border-radius: 12px; background: var(--white); cursor: pointer; font-weight: 800;
}
.menu-icon { width: 20px; height: 16px; display: grid; align-content: space-between; }
.menu-icon i { display: block; height: 2px; border-radius: 999px; background: var(--ink); }
.mobile-menu { border-top: 1px solid var(--line); background: var(--paper); }
.mobile-menu-inner { padding: 14px 0 18px; }
.mobile-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.mobile-nav .nav-link { border: 1px solid transparent; }
.mobile-nav .nav-link:hover, .mobile-nav .nav-link.is-active { border-color: var(--line); }
.breadcrumb-shell { padding-top: 18px; }
.breadcrumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0; color: var(--muted); font-size: 13px; }
.breadcrumbs li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumbs li:not(:last-child)::after { content: "/"; color: #A5B1AE; }
.breadcrumbs a:hover { color: var(--teal-dark); }

.eyebrow { margin: 0 0 10px; color: var(--teal-dark); font-size: 13px; font-weight: 900; letter-spacing: .12em; text-transform: uppercase; }
.home-hero { padding: 54px 0 72px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.02fr .98fr; align-items: center; gap: 64px; }
.hero-copy h1, .subhero-copy h1, .error-card h1 {
    margin: 0; color: var(--ink); line-height: 1.12; letter-spacing: -.035em; font-size: clamp(44px, 5vw, 74px); font-weight: 950;
}
.hero-lead, .subhero-copy > p:not(.eyebrow) { margin: 22px 0 0; font-size: 19px; line-height: 1.82; color: #52605d; max-width: 720px; }
.badge-row { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 24px; }
.badge { display: inline-flex; align-items: center; min-height: 32px; padding: 5px 11px; border-radius: 999px; background: var(--soft); color: var(--teal-dark); border: 1px solid rgba(47, 143, 131, .12); font-size: 13px; font-weight: 800; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.button {
    display: inline-flex; min-height: 48px; padding: 11px 18px; align-items: center; justify-content: center; border-radius: 14px; font-weight: 900; letter-spacing: .01em;
    border: 1px solid transparent; transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--teal); color: var(--white); box-shadow: 0 12px 24px rgba(47, 143, 131, .20); }
.button-primary:hover { background: var(--teal-dark); box-shadow: 0 16px 30px rgba(47, 143, 131, .25); }
.button-secondary { background: var(--accent); color: var(--white); box-shadow: 0 12px 24px rgba(233, 107, 76, .18); }
.button-secondary:hover { background: #D95D40; }
.button-ghost { background: rgba(255,255,255,.74); color: var(--ink); border-color: var(--line); }
.button-ghost:hover { background: var(--white); border-color: #BFD3CD; box-shadow: var(--shadow-soft); }
.hero-facts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin: 34px 0 0; padding: 24px 0 0; border-top: 1px solid var(--line); }
.hero-facts div { display: grid; gap: 5px; }
.hero-facts dt { color: var(--muted); font-size: 12px; font-weight: 800; letter-spacing: .08em; }
.hero-facts dd { margin: 0; color: var(--ink); font-weight: 800; }
.hero-visual { position: relative; min-height: 610px; }
.hero-visual::before {
    content: ""; position: absolute; inset: 8% 3% 2% 9%; border-radius: 46% 54% 44% 56% / 48% 40% 60% 52%;
    background: linear-gradient(145deg, rgba(47, 143, 131, .20), rgba(242, 179, 111, .34)); transform: rotate(-4deg);
}
.hero-visual::after { content: ""; position: absolute; width: 150px; height: 150px; border-radius: 50%; right: -6%; top: 1%; background: rgba(233, 107, 76, .14); }
.hero-visual > img { position: relative; z-index: 1; width: 88%; height: 580px; margin-left: auto; border-radius: 36px; object-fit: cover; box-shadow: var(--shadow); }
.hero-float-card {
    position: absolute; z-index: 2; max-width: 220px; padding: 14px 16px; border-radius: 18px; background: rgba(255,255,255,.92); box-shadow: var(--shadow-soft); border: 1px solid rgba(255,255,255,.86); backdrop-filter: blur(12px);
}
.hero-float-card span { display: block; color: var(--accent); font-size: 12px; font-weight: 900; margin-bottom: 3px; }
.hero-float-card strong { color: var(--ink); line-height: 1.4; }
.hero-float-top { left: 0; top: 12%; }
.hero-float-bottom { right: -2%; bottom: 4%; }

.section { padding: 86px 0; }
.section-soft { background: var(--soft); }
.section-heading { max-width: 760px; margin-bottom: 34px; }
.section-heading h2, .use-flow-intro h2, .scene-copy h2, .security-copy h2, .compare-card h2, .checklist-intro h2, .notes-grid h2, .closing-card h2 {
    margin: 0; color: var(--ink); font-size: clamp(30px, 3.5vw, 48px); line-height: 1.2; letter-spacing: -.025em;
}
.section-heading > p:not(.eyebrow), .use-flow-intro > p:not(.eyebrow), .scene-copy > p:not(.eyebrow), .security-copy > p:not(.eyebrow), .compare-card > p:not(.eyebrow), .checklist-intro > p:not(.eyebrow), .notes-grid article > p:not(.eyebrow), .closing-card p:not(.eyebrow) { color: var(--muted); margin: 14px 0 0; font-size: 17px; }
.split-heading { display: grid; grid-template-columns: 1fr .82fr; gap: 42px; max-width: none; align-items: end; }
.split-heading > p { margin: 0 0 4px !important; }
.centered-heading { text-align: center; margin-left: auto; margin-right: auto; }
.filter-bar { display: flex; flex-wrap: wrap; gap: 9px; margin: 0 0 28px; }
.filter-button { border: 1px solid var(--line); background: var(--white); color: var(--muted); border-radius: 999px; padding: 9px 14px; cursor: pointer; font-weight: 800; }
.filter-button:hover { border-color: #AFCBC4; color: var(--teal-dark); }
.filter-button.is-active { background: var(--ink); color: var(--white); border-color: var(--ink); }
.content-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.content-grid.three-columns { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.content-card { display: grid; grid-template-columns: 210px 1fr; min-width: 0; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; box-shadow: 0 10px 26px rgba(36,51,49,.04); transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease; }
.content-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-soft); border-color: #C5D9D4; }
.card-media { min-height: 100%; background: var(--soft); overflow: hidden; }
.card-media img { width: 100%; height: 100%; min-height: 100%; object-fit: cover; transition: transform .4s ease; }
.content-card:hover .card-media img { transform: scale(1.025); }
.card-body { padding: 24px; }
.card-body h3 { margin: 0; color: var(--ink); font-size: 22px; line-height: 1.35; letter-spacing: -.015em; }
.card-body > p:not(.eyebrow) { color: var(--muted); margin: 10px 0 0; }
.compact-list, .check-list { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 8px; }
.compact-list li, .check-list li { position: relative; padding-left: 20px; color: #53615e; }
.compact-list li::before, .check-list li::before { content: ""; position: absolute; left: 0; top: .72em; width: 7px; height: 7px; border-radius: 50%; background: var(--apricot); transform: translateY(-50%); }
.text-link { display: inline-flex; align-items: center; gap: 8px; margin-top: 18px; color: var(--teal-dark); font-weight: 900; }
.text-link span { transition: transform .2s ease; }
.text-link:hover span { transform: translateX(4px); }
.filter-empty { padding: 30px; border: 1px dashed var(--line); border-radius: var(--radius-lg); color: var(--muted); text-align: center; }
.compact-card { display: block; }
.compact-card .card-media { aspect-ratio: 16 / 10; }
.compact-card .card-body { padding: 22px; }

.use-flow-grid { display: grid; grid-template-columns: .72fr 1.28fr; gap: 70px; align-items: start; }
.use-flow-intro { position: sticky; top: 120px; }
.info-rows { display: grid; gap: 14px; }
.info-row { display: grid; grid-template-columns: 92px 1fr; gap: 20px; padding: 24px; border-radius: var(--radius-md); background: rgba(255,255,255,.72); border: 1px solid rgba(47,143,131,.09); }
.info-kicker { display: inline-flex; align-items: center; justify-content: center; align-self: start; min-height: 38px; padding: 7px 9px; border-radius: 11px; background: rgba(47,143,131,.10); color: var(--teal-dark); font-size: 12px; font-weight: 900; text-align: center; }
.info-row h3 { margin: 0; color: var(--ink); font-size: 20px; line-height: 1.35; }
.info-row p { margin: 8px 0 0; color: var(--muted); }
.scene-band { padding-top: 98px; padding-bottom: 98px; }
.scene-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: center; }
.scene-image { position: relative; }
.scene-image::after { content: ""; position: absolute; inset: auto -18px -18px 15%; height: 60%; border-radius: 28px; background: rgba(242,179,111,.18); z-index: -1; }
.scene-image img { border-radius: var(--radius-xl); min-height: 460px; object-fit: cover; box-shadow: var(--shadow); }
.scene-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.faq-list { display: grid; gap: 12px; }
.faq-item { border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--white); overflow: clip; }
.faq-item summary { position: relative; list-style: none; cursor: pointer; padding: 20px 54px 20px 22px; font-weight: 900; color: var(--ink); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 22px; top: 50%; transform: translateY(-50%); width: 28px; height: 28px; display: grid; place-items: center; border-radius: 50%; background: var(--soft); color: var(--teal-dark); font-size: 20px; }
.faq-item[open] summary::after { content: "−"; }
.faq-answer { padding: 0 22px 22px; color: var(--muted); }
.faq-answer p { margin: 0; }
.closing-cta { padding-top: 34px; padding-bottom: 100px; }
.closing-card { display: flex; align-items: center; justify-content: space-between; gap: 44px; padding: 44px 48px; border-radius: var(--radius-xl); background: linear-gradient(135deg, var(--ink), #31544f); color: var(--white); box-shadow: var(--shadow); }
.closing-card .eyebrow { color: #A6DED4; }
.closing-card h2 { color: var(--white); max-width: 720px; }
.closing-card p:not(.eyebrow) { color: #CDDCDA; max-width: 740px; }
.closing-card .button-primary { background: var(--apricot); color: var(--ink); box-shadow: none; flex: 0 0 auto; }
.closing-card .button-primary:hover { background: #F6C487; }
.compact-closing { padding-top: 46px; }

.subhero { padding: 58px 0 74px; }
.subhero-grid { display: grid; grid-template-columns: 1fr .92fr; align-items: center; gap: 58px; }
.subhero-copy h1 { font-size: clamp(42px, 4.7vw, 68px); }
.subhero-media { position: relative; }
.subhero-media::before { content: ""; position: absolute; inset: 8% -4% -7% 12%; background: linear-gradient(145deg, rgba(47,143,131,.13), rgba(242,179,111,.25)); border-radius: 32px; z-index: -1; }
.subhero-media img { width: 100%; min-height: 440px; max-height: 560px; object-fit: cover; border-radius: 30px; box-shadow: var(--shadow); }
.web-subhero .subhero-media::after { content: "WEB"; position: absolute; right: -8px; top: -26px; color: rgba(47,143,131,.11); font-size: 74px; line-height: 1; font-weight: 950; letter-spacing: -.04em; z-index: -2; }
.desktop-subhero { background: linear-gradient(180deg, rgba(238,245,242,.66), rgba(250,252,250,0)); }
.framed-media img { border: 10px solid var(--ink); border-bottom-width: 22px; border-radius: 24px; }
.phone-media { display: grid; place-items: center; }
.phone-media img { width: min(76%, 430px); min-height: 520px; object-fit: cover; border-radius: 46px; border: 10px solid var(--ink); box-shadow: var(--shadow); }
.phone-media::before { inset: 10% 10% -5% 20%; border-radius: 50px; }
.article-layout { display: grid; grid-template-columns: 220px 1fr; gap: 64px; align-items: start; }
.article-index { position: sticky; top: 120px; display: grid; gap: 4px; padding: 18px; border: 1px solid var(--line); border-radius: var(--radius-md); background: rgba(255,255,255,.74); }
.article-index a { padding: 10px 12px; border-radius: 10px; color: var(--muted); font-weight: 800; }
.article-index a:hover { background: var(--soft); color: var(--teal-dark); }
.article-main { min-width: 0; }
.article-section + .article-section { margin-top: 82px; }
.article-section .section-heading { max-width: 820px; }
.security-panel { display: grid; grid-template-columns: 1fr 320px; gap: 40px; align-items: center; padding: 38px; border-radius: var(--radius-xl); background: var(--soft); }
.security-media img { border-radius: 24px; min-height: 360px; object-fit: cover; }
.security-copy .check-list { margin-top: 24px; }

.checklist-layout { display: grid; grid-template-columns: .86fr 1.14fr; gap: 58px; align-items: start; }
.checklist-intro { position: sticky; top: 120px; }
.checklist-intro img { margin-top: 26px; border-radius: 22px; box-shadow: var(--shadow-soft); }
.checklist-cards { display: grid; gap: 14px; }
.check-card { display: grid; grid-template-columns: 58px 1fr; gap: 18px; padding: 22px; border-radius: var(--radius-md); background: var(--white); border: 1px solid var(--line); }
.check-number { display: grid; place-items: center; width: 50px; height: 50px; border-radius: 16px; background: rgba(47,143,131,.10); color: var(--teal-dark); font-weight: 950; }
.check-card h3 { margin: 0; color: var(--ink); font-size: 19px; }
.check-card p { margin: 7px 0 0; color: var(--muted); }
.desktop-notes { padding-top: 54px; }
.notes-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.notes-grid article { padding: 30px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--white); }
.notes-grid h2 { font-size: 26px; }
.mobile-info-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 56px; align-items: start; }
.mobile-info-copy { position: sticky; top: 120px; }
.mobile-info-copy h2 { margin: 0; color: var(--ink); font-size: clamp(30px,3.5vw,46px); line-height: 1.18; }
.mobile-info-copy > p:not(.eyebrow) { color: var(--muted); font-size: 17px; }
.mobile-info-copy img { margin-top: 26px; border-radius: 26px; box-shadow: var(--shadow-soft); }
.compare-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.compare-card { padding: 36px; border: 1px solid var(--line); border-radius: var(--radius-xl); background: var(--white); }
.compare-card h2 { font-size: 32px; }
.emphasis-card { background: var(--ink); border-color: var(--ink); color: var(--white); }
.emphasis-card .eyebrow { color: #9ED7CC; }
.emphasis-card h2 { color: var(--white); }
.emphasis-card .check-list li { color: #D6E2E0; }
.emphasis-card .text-link { color: var(--apricot); }

.error-main { min-height: 64vh; display: grid; align-items: center; }
.error-section { width: 100%; }
.error-card { display: grid; grid-template-columns: 240px 1fr; gap: 44px; align-items: center; padding: 56px; border-radius: var(--radius-xl); background: var(--soft); }
.error-code { font-size: clamp(86px,12vw,170px); line-height: .8; font-weight: 950; color: rgba(47,143,131,.18); letter-spacing: -.08em; }
.error-card h1 { font-size: clamp(36px,4vw,58px); }
.error-card p:not(.eyebrow) { color: var(--muted); font-size: 18px; }

.site-footer { background: #1F2C2A; color: #C9D6D3; padding: 70px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr .7fr .7fr; gap: 54px; }
.footer-title { color: var(--white); font-size: 26px; font-weight: 950; }
.footer-brand p { max-width: 520px; color: #AFC0BC; }
.footer-note-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.footer-note-list span { padding: 6px 9px; border: 1px solid #354744; border-radius: 999px; font-size: 12px; color: #B9CAC6; }
.footer-links { display: grid; align-content: start; gap: 9px; }
.footer-links h2 { margin: 0 0 8px; color: var(--white); font-size: 15px; }
.footer-links a { color: #AFC0BC; }
.footer-links a:hover { color: var(--white); }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 52px; padding-top: 20px; border-top: 1px solid #33433F; font-size: 13px; color: #8FA39E; }
.footer-bottom p { margin: 0; }
.footer-bottom a:hover { color: var(--white); }

@media (max-width: 1120px) {
    :root { --shell: min(100% - 34px, 1100px); }
    .desktop-nav .nav-link small { display: none; }
    .hero-grid, .subhero-grid { gap: 42px; }
    .hero-copy h1 { font-size: clamp(42px,5.4vw,64px); }
    .hero-visual { min-height: 540px; }
    .hero-visual > img { height: 520px; }
    .content-card { grid-template-columns: 170px 1fr; }
    .content-grid.three-columns .content-card { display: block; }
    .content-grid.three-columns .card-media { aspect-ratio: 16 / 10; }
    .article-layout { grid-template-columns: 190px 1fr; gap: 42px; }
}

@media (max-width: 979px) {
    .desktop-nav-wrap { display: none; }
    .menu-toggle { display: inline-flex; }
    .header-shell { min-height: 72px; }
    .hero-grid, .subhero-grid, .scene-grid, .use-flow-grid, .checklist-layout, .mobile-info-grid { grid-template-columns: 1fr; }
    .hero-grid { gap: 38px; }
    .hero-copy { max-width: 760px; }
    .hero-visual { min-height: 500px; width: min(760px, 100%); margin-inline: auto; }
    .hero-visual > img { width: 88%; height: 480px; margin-inline: auto; }
    .hero-float-top { left: 2%; }
    .hero-float-bottom { right: 2%; }
    .split-heading { grid-template-columns: 1fr; gap: 12px; }
    .use-flow-intro, .checklist-intro, .mobile-info-copy { position: static; }
    .use-flow-grid, .checklist-layout, .mobile-info-grid { gap: 40px; }
    .scene-grid { gap: 40px; }
    .content-grid { grid-template-columns: 1fr; }
    .content-grid.three-columns { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .article-layout { grid-template-columns: 1fr; }
    .article-index { position: static; display: flex; flex-wrap: wrap; gap: 4px; }
    .article-index .eyebrow { flex-basis: 100%; }
    .security-panel { grid-template-columns: 1fr .62fr; }
    .notes-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1.3fr .7fr .7fr; gap: 34px; }
}

@media (max-width: 760px) {
    :root { --shell: min(100% - 28px, 720px); --narrow: min(100% - 28px, 720px); }
    body { font-size: 15px; }
    .site-header { backdrop-filter: blur(12px); }
    .brand-text small { display: none; }
    .brand-logo-wrap { width: 42px; height: 42px; border-radius: 13px; }
    .mobile-nav { grid-template-columns: 1fr; }
    .mobile-nav .nav-link small { white-space: normal; }
    .home-hero { padding: 40px 0 54px; }
    .hero-copy h1, .subhero-copy h1 { font-size: clamp(38px,11vw,54px); }
    .hero-lead, .subhero-copy > p:not(.eyebrow) { font-size: 17px; }
    .hero-actions .button { flex: 1 1 220px; }
    .hero-facts { grid-template-columns: 1fr; gap: 14px; }
    .hero-visual { min-height: 440px; }
    .hero-visual > img { height: 420px; width: 92%; border-radius: 28px; }
    .hero-float-card { max-width: 190px; padding: 12px 14px; }
    .hero-float-top { top: 7%; }
    .hero-float-bottom { bottom: 0; }
    .section { padding: 68px 0; }
    .section-heading h2, .use-flow-intro h2, .scene-copy h2, .security-copy h2, .checklist-intro h2, .closing-card h2 { font-size: clamp(28px,8vw,40px); }
    .content-card { grid-template-columns: 132px 1fr; }
    .card-body { padding: 18px; }
    .card-body h3 { font-size: 20px; }
    .compact-list { display: none; }
    .content-grid.three-columns { grid-template-columns: 1fr; }
    .content-grid.three-columns .compact-list { display: grid; }
    .info-row { grid-template-columns: 1fr; gap: 12px; padding: 20px; }
    .info-kicker { width: fit-content; }
    .scene-image img { min-height: 340px; }
    .closing-card { align-items: stretch; flex-direction: column; padding: 32px 28px; }
    .closing-card .button-primary { width: 100%; }
    .subhero { padding: 44px 0 58px; }
    .subhero-grid { gap: 34px; }
    .subhero-media img { min-height: 340px; border-radius: 24px; }
    .phone-media img { min-height: 460px; width: min(82%, 400px); border-radius: 40px; }
    .security-panel { grid-template-columns: 1fr; padding: 28px; }
    .security-media img { min-height: 300px; max-height: 420px; width: 100%; }
    .check-card { grid-template-columns: 48px 1fr; padding: 19px; }
    .check-number { width: 42px; height: 42px; border-radius: 13px; }
    .compare-grid { grid-template-columns: 1fr; }
    .compare-card { padding: 28px; }
    .error-card { grid-template-columns: 1fr; gap: 12px; padding: 34px 28px; }
    .error-code { font-size: 90px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
    .footer-bottom { flex-direction: column; }
}

@media (max-width: 520px) {
    :root { --shell: min(100% - 22px, 500px); --narrow: min(100% - 22px, 500px); }
    .header-shell { min-height: 66px; gap: 12px; }
    .brand-mark { gap: 8px; }
    .brand-text strong { font-size: 18px; }
    .menu-toggle { padding: 9px 10px; }
    .hero-copy h1, .subhero-copy h1 { font-size: clamp(34px,12vw,46px); }
    .hero-visual { min-height: 380px; }
    .hero-visual > img { height: 360px; width: 100%; }
    .hero-float-card { font-size: 13px; max-width: 165px; }
    .hero-float-top { left: -3px; top: 5%; }
    .hero-float-bottom { right: -3px; bottom: -4px; }
    .content-card { display: block; }
    .content-card .card-media { aspect-ratio: 16 / 9; }
    .compact-list { display: grid; }
    .filter-bar { overflow-x: auto; flex-wrap: nowrap; padding-bottom: 4px; scrollbar-width: thin; }
    .filter-button { flex: 0 0 auto; }
    .scene-image img { min-height: 290px; }
    .article-index { overflow-x: auto; flex-wrap: nowrap; }
    .article-index .eyebrow { display: none; }
    .article-index a { flex: 0 0 auto; border: 1px solid var(--line); }
    .check-card { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-brand { grid-column: auto; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

@media print {
    .site-header, .site-footer, .menu-toggle, .filter-bar, .hero-actions, .scene-actions, .closing-cta { display: none !important; }
    body { background: #fff; color: #000; font-size: 12pt; }
    .section, .home-hero, .subhero { padding: 20pt 0; }
    .content-card, .info-row, .compare-card, .check-card, .faq-item { box-shadow: none; border-color: #bbb; break-inside: avoid; }
    .hero-grid, .subhero-grid, .scene-grid, .use-flow-grid, .checklist-layout, .mobile-info-grid, .article-layout { display: block; }
    .hero-visual, .subhero-media, .scene-image, .security-media, .mobile-info-copy img, .checklist-intro img { max-width: 55%; margin: 16pt auto; }
}

/* Extended content systems */
.reading-guide-section { background: linear-gradient(180deg, #FAFCFA 0%, #F7FAF8 100%); }
.reading-guide-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.reading-guide-card { position: relative; min-height: 220px; padding: 26px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--white); overflow: hidden; }
.reading-guide-card::after { content: ""; position: absolute; width: 90px; height: 90px; border-radius: 50%; right: -32px; bottom: -36px; background: rgba(47,143,131,.08); }
.reading-guide-card > span { display: inline-flex; padding: 5px 9px; border-radius: 999px; background: rgba(242,179,111,.18); color: #98652f; font-size: 12px; font-weight: 900; }
.reading-guide-card h3 { margin: 16px 0 0; color: var(--ink); font-size: 21px; line-height: 1.4; }
.reading-guide-card p { margin: 10px 0 0; color: var(--muted); }

.troubleshooting-list { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; }
.troubleshooting-card { padding: 24px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--white); }
.troubleshooting-card h3 { margin: 0 0 18px; color: var(--ink); font-size: 20px; line-height: 1.42; }
.troubleshooting-card dl { display: grid; gap: 14px; margin: 0; }
.troubleshooting-card dl div { display: grid; grid-template-columns: 62px 1fr; gap: 12px; padding-top: 14px; border-top: 1px dashed var(--line); }
.troubleshooting-card dt { color: var(--teal-dark); font-size: 12px; font-weight: 900; }
.troubleshooting-card dd { margin: 0; color: var(--muted); }

.comfort-section { overflow: hidden; }
.comfort-table { border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; background: var(--white); }
.comfort-row { display: grid; grid-template-columns: .55fr 1.3fr 1.15fr; }
.comfort-row + .comfort-row { border-top: 1px solid var(--line); }
.comfort-row > * { padding: 18px 20px; }
.comfort-row > * + * { border-left: 1px solid var(--line); }
.comfort-row strong { color: var(--ink); }
.comfort-row span { color: var(--muted); }
.comfort-head { background: #E4F0EC; }
.comfort-head span { color: var(--ink); font-size: 13px; font-weight: 900; }

.mobile-safety-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.mobile-safety-card { position: relative; padding: 28px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--white); }
.mobile-safety-card > span { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 14px; background: var(--soft); color: var(--teal-dark); font-weight: 950; }
.mobile-safety-card h3 { margin: 18px 0 0; color: var(--ink); font-size: 21px; line-height: 1.4; }
.mobile-safety-card p { margin: 10px 0 0; color: var(--muted); }

@media (max-width: 979px) {
    .reading-guide-grid, .mobile-safety-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .comfort-row { grid-template-columns: .65fr 1.25fr 1.1fr; }
}

@media (max-width: 760px) {
    .troubleshooting-list { grid-template-columns: 1fr; }
    .comfort-table { background: transparent; border: 0; overflow: visible; display: grid; gap: 12px; }
    .comfort-head { display: none; }
    .comfort-row { grid-template-columns: 1fr; border: 1px solid var(--line) !important; border-radius: var(--radius-md); overflow: hidden; background: var(--white); }
    .comfort-row > * { padding: 14px 18px; }
    .comfort-row > * + * { border-left: 0; border-top: 1px solid var(--line); }
    .comfort-row strong { background: var(--soft); }
}

@media (max-width: 520px) {
    .reading-guide-grid, .mobile-safety-grid { grid-template-columns: 1fr; }
    .reading-guide-card, .mobile-safety-card { min-height: 0; padding: 23px; }
    .troubleshooting-card dl div { grid-template-columns: 1fr; gap: 5px; }
}

.site-principles-section { background: #F4F8F6; border-top: 1px solid rgba(47,143,131,.08); border-bottom: 1px solid rgba(47,143,131,.08); }
.principles-layout { display: grid; grid-template-columns: .74fr 1.26fr; gap: 56px; align-items: start; }
.principles-intro { position: sticky; top: 120px; }
.principles-intro h2 { margin: 0; color: var(--ink); font-size: clamp(30px,3.4vw,46px); line-height: 1.2; letter-spacing: -.025em; }
.principles-intro > p:not(.eyebrow) { margin: 14px 0 0; color: var(--muted); font-size: 17px; }
.principles-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; }
.principle-card { min-height: 190px; padding: 26px; border-radius: var(--radius-lg); background: var(--white); border: 1px solid var(--line); box-shadow: 0 8px 24px rgba(36,51,49,.035); }
.principle-card h3 { margin: 0; color: var(--ink); font-size: 21px; line-height: 1.4; }
.principle-card p { margin: 10px 0 0; color: var(--muted); }
.principle-card:nth-child(1) { transform: translateY(14px); }
.principle-card:nth-child(4) { transform: translateY(-14px); }

@media (max-width: 979px) {
    .principles-layout { grid-template-columns: 1fr; gap: 34px; }
    .principles-intro { position: static; max-width: 760px; }
    .principle-card:nth-child(1), .principle-card:nth-child(4) { transform: none; }
}
@media (max-width: 600px) {
    .principles-grid { grid-template-columns: 1fr; }
    .principle-card { min-height: 0; padding: 22px; }
}