/* 91llq-internet.cloud content-first visual system */
:root {
    --primary: #6F5AE8;
    --primary-soft: #9A8CF2;
    --dark: #242433;
    --bg: #F8F8FC;
    --bg-soft: #F0EEFA;
    --text: #30303A;
    --muted: #70707D;
    --accent: #F29A4A;
    --white: #FFFFFF;
    --line: #DDD9EE;
    --success-soft: #EDF6F0;
    --warning-soft: #FFF2E7;
    --shadow: 0 20px 60px rgba(36, 36, 51, .08);
    --radius-lg: 28px;
    --radius-md: 18px;
    --radius-sm: 12px;
    --wrap: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; font-size: 16px; line-height: 1.75; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible, input:focus-visible, summary:focus-visible { outline: 3px solid rgba(111, 90, 232, .35); outline-offset: 3px; }
button, input { font: inherit; }
button { cursor: pointer; }
.wrap { width: min(calc(100% - 40px), var(--wrap)); margin: 0 auto; }
.skip-link { position: fixed; left: 18px; top: -80px; z-index: 1000; background: var(--dark); color: var(--white); padding: 10px 16px; border-radius: 10px; transition: top .2s ease; }
.skip-link:focus { top: 18px; }
.site-header { position: sticky; top: 0; z-index: 80; background: rgba(248, 248, 252, .94); border-bottom: 1px solid rgba(221, 217, 238, .85); backdrop-filter: blur(14px); }
.header-row { min-height: 78px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 26px; }
.brand { display: inline-flex; align-items: center; gap: 11px; min-width: max-content; }
.brand img { width: 44px; height: 44px; object-fit: contain; border-radius: 12px; }
.brand span { display: grid; line-height: 1.25; }
.brand strong { font-size: 17px; letter-spacing: .01em; }
.brand small { margin-top: 3px; color: var(--muted); font-size: 12px; }
.primary-nav { justify-self: center; display: flex; align-items: center; gap: 4px; }
.nav-link { color: #565663; padding: 9px 11px; border-radius: 10px; font-size: 14px; transition: .2s ease; }
.nav-link:hover, .nav-link.is-active { color: var(--primary); background: var(--bg-soft); }
.search-open, .nav-toggle { border: 0; border-radius: 11px; background: var(--dark); color: var(--white); padding: 10px 15px; }
.nav-toggle { display: none; }
.site-main { min-height: 66vh; }
.eyebrow { margin: 0 0 10px; color: var(--primary); font-size: 13px; font-weight: 800; letter-spacing: .11em; text-transform: uppercase; }
.hero { padding: 72px 0 54px; overflow: clip; }
.hero-grid { display: grid; grid-template-columns: 1.02fr .98fr; gap: 58px; align-items: center; }
.hero h1, .page-intro h1 { margin: 0; color: var(--dark); font-size: clamp(42px, 5vw, 72px); line-height: 1.07; letter-spacing: -.045em; }
.hero-lead, .lead { margin: 24px 0 0; color: #545463; font-size: clamp(18px, 2vw, 21px); line-height: 1.8; }
.hero-actions, .inline-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 11px 18px; border: 1px solid transparent; border-radius: 12px; font-weight: 750; line-height: 1.2; }
.button--primary { background: var(--primary); color: var(--white); }
.button--accent { background: var(--accent); color: #2d2015; }
.button--ghost { border-color: var(--line); background: var(--white); color: var(--dark); }
.button--light { background: var(--white); color: var(--dark); }
.button--outline-light { border-color: rgba(255,255,255,.3); color: var(--white); }
.hero-points { display: flex; flex-wrap: wrap; gap: 8px 18px; margin: 24px 0 0; padding: 0; list-style: none; color: var(--muted); font-size: 13px; }
.hero-points li::before { content: "•"; color: var(--accent); margin-right: 8px; }
.hero-media { position: relative; margin: 0; padding: 18px; background: var(--white); border-radius: 34px; box-shadow: var(--shadow); }
.hero-media::before { content: ""; position: absolute; width: 220px; height: 220px; right: -65px; top: -65px; border-radius: 50%; background: var(--bg-soft); z-index: -1; }
.hero-media img { width: 100%; aspect-ratio: 1.38 / 1; object-fit: cover; border-radius: 24px; background: var(--bg-soft); }
.hero-media figcaption { padding: 14px 8px 2px; color: var(--muted); font-size: 13px; }
.section { padding: 74px 0; }
.section--tight { padding-top: 36px; }
.section--soft { background: #F2F1F8; }
.section--lavender { background: var(--bg-soft); }
.section--dark { background: var(--dark); color: #EDEDF4; }
.section--dark h2, .section--dark h3 { color: var(--white); }
.section--dark .eyebrow { color: #B9AEFF; }
.section--closing { padding-top: 40px; }
.section-heading { max-width: 760px; margin-bottom: 34px; }
.section-heading h2, .feature-copy h2, .editorial-band h2, .image-led h2, .closing-card h2, .callout-panel h2, .troubleshoot-intro h2 { margin: 0; color: var(--dark); font-size: clamp(28px, 3vw, 42px); line-height: 1.2; letter-spacing: -.025em; }
.section-heading > p:not(.eyebrow) { color: var(--muted); margin: 12px 0 0; }
.section-heading--split { max-width: none; display: grid; grid-template-columns: 1fr .8fr; gap: 40px; align-items: end; }
.section-heading--split > p { margin: 0; }
.link-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.link-card { padding: 28px; border: 1px solid var(--line); background: var(--white); border-radius: var(--radius-md); box-shadow: 0 12px 32px rgba(36,36,51,.04); }
.link-card h3 { margin: 0; color: var(--dark); font-size: 21px; }
.link-card p { color: var(--muted); }
.text-link { color: var(--primary); font-weight: 760; }
.text-link:hover { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 4px; }
.split-feature, .image-led { display: grid; grid-template-columns: .95fr 1.05fr; gap: 54px; align-items: center; }
.split-feature--reverse { grid-template-columns: 1.02fr .98fr; }
.feature-media { margin: 0; }
.feature-media img, .image-led img { width: 100%; aspect-ratio: 1.45 / 1; object-fit: cover; border-radius: var(--radius-lg); background: var(--bg-soft); }
.feature-copy > p:not(.eyebrow) { color: var(--muted); }
.section--dark .feature-copy > p:not(.eyebrow) { color: #C9C9D6; }
.editorial-band { display: grid; grid-template-columns: .72fr 1.28fr; gap: 60px; }
.editorial-band__lead { position: sticky; top: 110px; align-self: start; }
.editorial-band__lead > p:not(.eyebrow) { color: var(--muted); }
.editorial-list { border-top: 1px solid var(--line); }
.editorial-list article { display: grid; grid-template-columns: 52px 1fr; gap: 18px; padding: 24px 0; border-bottom: 1px solid var(--line); }
.editorial-list article > span { color: var(--primary); font-weight: 800; }
.editorial-list h3 { margin: 0 0 6px; font-size: 20px; }
.editorial-list p { margin: 0; color: var(--muted); }
.check-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.check-grid--two { grid-template-columns: repeat(2, 1fr); }
.check-grid article { padding: 23px; border-radius: 16px; background: var(--white); border: 1px solid var(--line); }
.check-grid h3 { margin: 0 0 7px; color: var(--dark); font-size: 17px; }
.check-grid p { margin: 0; color: var(--muted); font-size: 14px; }
.section-cta { margin: 24px 0 0; }
.image-led { grid-template-columns: .9fr 1.1fr; }
.image-led figure { margin: 0; }
.image-led p:not(.eyebrow) { color: var(--muted); }
.steps-list { list-style: none; counter-reset: steps; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 15px; }
.steps-list li { counter-increment: steps; padding: 26px; background: rgba(255,255,255,.65); border: 1px solid #D9D3EF; border-radius: 18px; }
.steps-list li::before { content: counter(steps, decimal-leading-zero); display: block; color: var(--primary); font-weight: 800; margin-bottom: 18px; }
.steps-list h3 { margin: 0 0 7px; }
.steps-list p { margin: 0; color: var(--muted); }
.faq-preview { display: grid; grid-template-columns: .82fr 1.18fr; gap: 54px; }
.faq-preview > div:first-child img { margin-top: 26px; border-radius: var(--radius-lg); background: var(--bg-soft); }
.faq-preview h2 { margin: 0; color: var(--dark); font-size: 38px; line-height: 1.2; }
.faq-preview > div:first-child > p:not(.eyebrow) { color: var(--muted); }
.faq-stack { display: grid; gap: 10px; }
details { border: 1px solid var(--line); border-radius: 14px; background: var(--white); padding: 0 18px; }
summary { cursor: pointer; font-weight: 750; color: var(--dark); padding: 17px 28px 17px 0; position: relative; }
summary::after { content: "+"; position: absolute; right: 0; top: 14px; color: var(--primary); font-size: 22px; }
details[open] summary::after { content: "−"; }
details p { color: var(--muted); margin: 0; padding: 0 0 17px; }
.closing-card { display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px; align-items: center; padding: 38px; border-radius: var(--radius-lg); background: var(--dark); color: #D8D8E3; }
.closing-card h2 { color: var(--white); }
.closing-card p:not(.eyebrow) { margin-bottom: 0; }
.closing-links { display: flex; flex-wrap: wrap; gap: 10px; }
.closing-links a { padding: 11px 14px; background: rgba(255,255,255,.08); color: var(--white); border: 1px solid rgba(255,255,255,.13); border-radius: 10px; }
.breadcrumbs { padding: 22px 0 0; }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 0; padding: 0; color: var(--muted); font-size: 13px; }
.breadcrumbs li:not(:last-child)::after { content: "/"; margin-left: 8px; color: #AAA8B5; }
.breadcrumbs a:hover { color: var(--primary); }
.page-intro { display: grid; grid-template-columns: 1fr .62fr; gap: 46px; align-items: center; padding: 48px 0 38px; }
.page-intro h1 { font-size: clamp(36px, 4.4vw, 58px); }
.page-intro__media { margin: 0; }
.page-intro__media img { width: 100%; aspect-ratio: 1.5 / 1; object-fit: cover; border-radius: 24px; background: var(--bg-soft); }
.prose-grid { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 56px; align-items: start; }
.prose-main { min-width: 0; }
.prose-main h2, .guide-content h2, .feedback-layout article h2, .about-layout article h2, .prose-narrow h2 { color: var(--dark); font-size: 28px; line-height: 1.25; margin: 42px 0 14px; }
.prose-main h2:first-child { margin-top: 0; }
.prose-main p, .about-layout article p, .feedback-layout article p { color: #555563; }
.prose-main a:not(.button), .about-layout article a { color: var(--primary); font-weight: 700; }
.prose-aside { position: sticky; top: 110px; display: grid; gap: 16px; }
.aside-card { padding: 22px; border-radius: 16px; background: var(--white); border: 1px solid var(--line); }
.aside-card h2 { margin: 0 0 12px; color: var(--dark); font-size: 18px; }
.aside-card ul { margin: 0; padding-left: 20px; color: var(--muted); }
.aside-card a { display: block; color: var(--primary); padding: 7px 0; font-weight: 700; }
.notice { margin: 28px 0; padding: 20px 22px; border-radius: 15px; border-left: 4px solid var(--primary); background: var(--bg-soft); }
.notice--important { border-left-color: var(--accent); background: #FFF5EC; }
.notice--warning { border-left-color: #D16A3A; background: var(--warning-soft); }
.notice strong { color: var(--dark); }
.notice p { margin: 6px 0 0; }
.numbered-content { list-style: none; counter-reset: item; padding: 0; margin: 24px 0; display: grid; gap: 12px; }
.numbered-content li { counter-increment: item; display: grid; grid-template-columns: 42px 1fr; column-gap: 13px; align-items: start; padding: 18px; border: 1px solid var(--line); background: var(--white); border-radius: 14px; }
.numbered-content li::before { content: counter(item, decimal-leading-zero); grid-row: 1 / span 2; width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; background: var(--bg-soft); color: var(--primary); font-size: 12px; font-weight: 800; }
.numbered-content strong { color: var(--dark); }
.numbered-content span { grid-column: 2; color: var(--muted); font-size: 14px; }
.decision-list { display: grid; gap: 12px; }
.decision-list a { display: grid; gap: 5px; padding: 18px 20px; background: var(--bg-soft); border-radius: 14px; }
.decision-list strong { color: var(--dark); }
.decision-list span { color: var(--muted); font-weight: 400; }
.guide-layout { display: grid; grid-template-columns: 270px minmax(0, 1fr); gap: 58px; align-items: start; }
.guide-index { position: sticky; top: 110px; padding: 20px; border: 1px solid var(--line); background: var(--white); border-radius: 16px; }
.guide-index h2 { margin: 0 0 12px; font-size: 18px; }
.guide-index a { display: block; padding: 8px 0; color: var(--muted); font-size: 14px; }
.guide-index a:hover { color: var(--primary); }
.guide-topic { scroll-margin-top: 100px; display: grid; grid-template-columns: 50px 1fr; gap: 18px; padding: 0 0 34px; margin: 0 0 34px; border-bottom: 1px solid var(--line); }
.topic-number { margin: 6px 0 0; color: var(--primary); font-weight: 800; }
.guide-topic h2 { margin-top: 0; }
.guide-topic p { color: var(--muted); }
.guide-summary { padding: 26px; border-radius: 18px; background: var(--bg-soft); }
.guide-summary h2 { margin-top: 0; }
.compat-list { display: grid; gap: 12px; }
.compat-list article { display: grid; grid-template-columns: 52px 1fr; gap: 18px; align-items: start; padding: 22px; background: var(--white); border: 1px solid var(--line); border-radius: 16px; }
.compat-list article > span { width: 42px; height: 42px; display: grid; place-items: center; background: var(--bg-soft); border-radius: 12px; color: var(--primary); font-weight: 800; }
.compat-list h3 { margin: 0 0 6px; font-size: 20px; }
.compat-list p { margin: 0; color: var(--muted); }
.split-columns { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.split-columns article { padding: 28px; border-radius: 18px; background: var(--white); border: 1px solid var(--line); }
.split-columns h2 { margin: 0 0 12px; color: var(--dark); font-size: 24px; }
.split-columns p { color: var(--muted); }
.callout-panel { display: flex; align-items: center; justify-content: space-between; gap: 34px; padding: 32px; border-radius: 22px; background: var(--white); border: 1px solid var(--line); }
.callout-panel p { margin-bottom: 0; color: var(--muted); }
.choice-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 24px; }
.choice-grid article { padding: 22px; border-radius: 15px; background: var(--white); border: 1px solid var(--line); }
.choice-grid h3 { margin: 0 0 7px; }
.choice-grid p { margin: 0; color: var(--muted); }
.repair-flow { list-style: none; margin: 42px 0 0; padding: 0; }
.repair-flow > li { display: grid; grid-template-columns: 68px 1fr; gap: 18px; padding: 26px 0; border-top: 1px solid var(--line); }
.repair-flow > li > span { color: var(--primary); font-weight: 800; font-size: 18px; }
.repair-flow h2 { margin: 0 0 7px; font-size: 26px; }
.repair-flow p { color: var(--muted); margin: 0; }
.microcopy { color: var(--muted); font-size: 13px; }
.safety-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.safety-grid article { padding: 30px; min-height: 230px; border-radius: 18px; background: var(--white); border: 1px solid var(--line); }
.safety-grid h2 { margin: 0; font-size: 25px; color: var(--dark); }
.safety-grid p { color: var(--muted); }
.prose-narrow { max-width: 850px; }
.privacy-list { display: grid; gap: 13px; }
.privacy-list article { display: grid; grid-template-columns: 62px 1fr; gap: 20px; padding: 24px 0; border-bottom: 1px solid var(--line); }
.privacy-list article > span { color: var(--primary); font-weight: 800; }
.privacy-list h2 { margin: 0 0 7px; color: var(--dark); font-size: 25px; }
.privacy-list p { margin: 0; color: var(--muted); }
.faq-page { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 42px; align-items: start; }
.faq-stack--large details { padding: 0 22px; }
.faq-stack--large summary { padding-top: 20px; padding-bottom: 20px; font-size: 17px; }
.faq-stack--large details > div { padding-bottom: 20px; }
.faq-stack--large details p { padding: 0; }
.faq-side { position: sticky; top: 110px; padding: 24px; background: var(--dark); color: #D9D9E3; border-radius: 18px; }
.faq-side h2 { color: var(--white); font-size: 20px; margin: 0 0 8px; }
.faq-side h2:not(:first-child) { margin-top: 28px; }
.faq-side > a { display: block; padding: 7px 0; color: #C2B9FF; font-weight: 700; }
.mini-search { display: grid; gap: 8px; }
.mini-search label { font-size: 13px; }
.mini-search input { width: 100%; border: 1px solid rgba(255,255,255,.2); background: rgba(255,255,255,.08); color: var(--white); border-radius: 10px; padding: 10px 12px; }
.mini-search button { border: 0; background: var(--accent); color: #2D2015; border-radius: 10px; padding: 10px 12px; font-weight: 800; }
.about-layout, .feedback-layout { display: grid; grid-template-columns: minmax(0,1fr) 300px; gap: 54px; align-items: start; }
.about-layout aside, .feedback-layout aside { position: sticky; top: 110px; display: grid; gap: 16px; }
.search-page-head { padding: 48px 0 24px; max-width: 900px; }
.search-page-head h1 { margin: 0; color: var(--dark); font-size: clamp(34px, 4vw, 54px); line-height: 1.15; }
.search-page-head > p:not(.eyebrow) { color: var(--muted); }
.search-form label { display: block; font-weight: 700; color: var(--dark); margin-bottom: 8px; }
.search-form__row { display: grid; grid-template-columns: 1fr auto; gap: 9px; }
.search-form input { width: 100%; min-width: 0; border: 1px solid var(--line); background: var(--white); padding: 12px 14px; border-radius: 11px; color: var(--text); }
.search-form button { border: 0; border-radius: 11px; background: var(--primary); color: var(--white); padding: 11px 16px; font-weight: 800; }
.search-form--page { margin-top: 24px; max-width: 640px; }
.results-heading { margin-bottom: 22px; }
.result-list { display: grid; gap: 14px; }
.result-list article { padding: 24px; background: var(--white); border: 1px solid var(--line); border-radius: 16px; }
.result-list h2 { margin: 5px 0 7px; font-size: 23px; }
.result-list h2 a:hover { color: var(--primary); }
.result-list p { color: var(--muted); margin: 0; }
.result-group { color: var(--primary) !important; font-size: 12px; font-weight: 800; letter-spacing: .08em; }
.empty-state { padding: 36px; background: var(--white); border: 1px solid var(--line); border-radius: 20px; }
.empty-state h2 { margin: 0; color: var(--dark); }
.empty-state > p { color: var(--muted); }
.empty-state .closing-links a { color: var(--dark); background: var(--bg-soft); border-color: var(--line); }
.error-page { min-height: 65vh; display: grid; place-items: center; padding: 70px 0; }
.error-card { max-width: 820px; padding: 48px; text-align: center; background: var(--white); border: 1px solid var(--line); border-radius: 26px; box-shadow: var(--shadow); }
.error-card h1 { margin: 0; color: var(--dark); font-size: clamp(34px, 5vw, 56px); }
.error-card > p:not(.eyebrow) { color: var(--muted); }
.error-card .closing-links { justify-content: center; margin-top: 26px; }
.error-card .closing-links a { color: var(--dark); background: var(--bg-soft); border-color: var(--line); }
.search-modal[hidden] { display: none !important; }
.search-modal { position: fixed; inset: 0; z-index: 200; display: grid; place-items: start center; padding: 100px 20px 20px; background: rgba(36,36,51,.62); }
.search-modal__panel { width: min(680px, 100%); padding: 24px; border-radius: 20px; background: var(--bg); box-shadow: 0 30px 100px rgba(0,0,0,.25); }
.search-modal__head { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 18px; }
.search-modal__head h2 { margin: 0; color: var(--dark); font-size: 24px; }
.icon-button { width: 40px; height: 40px; border: 0; border-radius: 10px; background: var(--bg-soft); color: var(--dark); font-size: 26px; line-height: 1; }
body.modal-open { overflow: hidden; }
.site-footer { margin-top: 40px; padding: 58px 0 28px; background: #20202D; color: #BEBECB; }
.footer-grid { display: grid; grid-template-columns: 1.25fr repeat(3, .75fr); gap: 38px; }
.footer-grid h2 { margin: 0 0 12px; color: var(--white); font-size: 17px; }
.footer-grid p { margin: 0; color: #A8A8B7; font-size: 14px; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li + li { margin-top: 7px; }
.footer-grid a { color: #CACAD5; font-size: 14px; }
.footer-grid a:hover { color: var(--white); }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 38px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.1); font-size: 13px; }
.footer-bottom p { margin: 0; }
.footer-bottom a { color: #C2B9FF; }
@media (max-width: 1120px) {
    .header-row { grid-template-columns: auto auto 1fr auto; gap: 14px; }
    .nav-toggle { display: inline-flex; justify-self: end; }
    .primary-nav { display: none; position: absolute; left: 20px; right: 20px; top: 72px; padding: 12px; background: var(--white); border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow); }
    .primary-nav.is-open { display: grid; }
    .nav-link { padding: 11px 12px; }
    .search-open { justify-self: end; }
    .check-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
    .wrap { width: min(calc(100% - 30px), var(--wrap)); }
    .hero { padding-top: 48px; }
    .hero-grid, .page-intro, .split-feature, .split-feature--reverse, .image-led, .editorial-band, .faq-preview, .closing-card, .section-heading--split, .prose-grid, .guide-layout, .faq-page, .about-layout, .feedback-layout { grid-template-columns: 1fr; }
    .hero-media { max-width: 720px; }
    .page-intro__media { max-width: 720px; }
    .editorial-band__lead, .prose-aside, .guide-index, .faq-side, .about-layout aside, .feedback-layout aside { position: static; }
    .guide-index { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 20px; }
    .guide-index h2 { grid-column: 1 / -1; }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 680px) {
    body { font-size: 15px; }
    .wrap { width: min(calc(100% - 24px), var(--wrap)); }
    .site-header { position: relative; }
    .header-row { min-height: 68px; grid-template-columns: 1fr auto auto; }
    .brand img { width: 38px; height: 38px; }
    .brand small { display: none; }
    .nav-toggle { grid-column: 2; }
    .search-open { grid-column: 3; padding: 9px 10px; font-size: 13px; }
    .primary-nav { top: 64px; left: 12px; right: 12px; }
    .hero h1, .page-intro h1 { font-size: 38px; }
    .hero-lead, .lead { font-size: 17px; }
    .hero-actions .button, .inline-actions .button { width: 100%; }
    .section { padding: 54px 0; }
    .link-grid, .steps-list, .check-grid, .check-grid--two, .split-columns, .choice-grid, .safety-grid { grid-template-columns: 1fr; }
    .guide-index { grid-template-columns: 1fr; }
    .editorial-list article { grid-template-columns: 42px 1fr; }
    .callout-panel { align-items: stretch; flex-direction: column; }
    .page-intro { padding-top: 34px; }
    .repair-flow > li, .privacy-list article { grid-template-columns: 44px 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; }
    .search-modal { padding-top: 24px; }
}
@media (max-width: 420px) {
    .brand strong { font-size: 15px; }
    .search-open { font-size: 0; width: 38px; height: 38px; padding: 0; }
    .search-open::before { content: "查"; font-size: 13px; }
    .hero { padding-top: 36px; }
    .hero h1, .page-intro h1 { font-size: 34px; }
    .link-card, .split-columns article, .safety-grid article { padding: 21px; }
    .error-card { padding: 32px 20px; }
}