/* Design contract: 麻豆视频“维修站编辑部”——赛道墨黑、维修纸灰、燃橙；不对称工单布局、缺口标签与转速刻度。 */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=Noto+Sans+SC:wght@400;500;600;700;800&family=Noto+Serif+SC:wght@700;900&display=swap');

:root {
  --ink: #121513;
  --ink-soft: #1a1f1c;
  --paper: #eeede6;
  --paper-deep: #d9d8cf;
  --orange: #f05b2a;
  --orange-deep: #b93412;
  --signal: #d9f65a;
  --steel: #9fb8c9;
  --line: rgba(238, 237, 230, 0.2);
  --muted: #aeb5ae;
  --shadow: 0 18px 45px rgba(0, 0, 0, 0.22);
  --ease: cubic-bezier(.23, 1, .32, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--ink); color: var(--paper); font-family: 'Noto Sans SC', system-ui, sans-serif; line-height: 1.65; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button { border: 0; }

.runtime-markers { height: 0; overflow: hidden; line-height: 0; font-size: 0; pointer-events: none; }
.site-shell { overflow: hidden; }
.wrap { width: min(1240px, calc(100% - 40px)); margin: 0 auto; }
.mono { font-family: 'IBM Plex Mono', monospace; letter-spacing: .04em; }
.eyebrow { display: flex; gap: 9px; align-items: center; color: var(--signal); font: 500 11px/1 'IBM Plex Mono', monospace; letter-spacing: .13em; text-transform: uppercase; }
.eyebrow::before { content: ''; width: 28px; height: 1px; background: currentColor; }
.section { position: relative; padding: 108px 0; }
.section.light { background: var(--paper); color: var(--ink); }
.section.deep { background: #171b19; }
.section-number { position: absolute; left: max(18px, calc((100vw - 1240px) / 2)); top: 28px; color: rgba(159, 184, 201, .35); font: 600 12px/1 'IBM Plex Mono', monospace; }
.title-row { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 34px; }
.title-row h2 { max-width: 760px; margin: 12px 0 0; font: 900 clamp(31px, 4vw, 58px)/1.15 'Noto Serif SC', serif; letter-spacing: -.035em; }
.title-row p { max-width: 350px; margin: 0; color: var(--muted); font-size: 14px; }
.light .title-row p { color: #5a625d; }

.status-strip { border-bottom: 1px solid var(--line); background: #0e110f; color: var(--steel); font-size: 11px; }
.status-strip .wrap { min-height: 34px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.status-live { color: var(--signal); display: inline-flex; align-items: center; gap: 8px; }
.status-live::before { content: ''; width: 7px; height: 7px; border-radius: 50%; background: currentColor; box-shadow: 0 0 0 4px rgba(217, 246, 90, .13); }

.site-header { position: sticky; top: 0; z-index: 20; background: rgba(18, 21, 19, .94); backdrop-filter: blur(14px); border-bottom: 1px solid var(--line); }
.header-main { min-height: 76px; display: flex; gap: 28px; align-items: center; justify-content: space-between; }
.brand-lockup { display: flex; align-items: center; gap: 12px; min-width: max-content; }
.brand-mark { width: 42px; height: 42px; border-radius: 12px; overflow: hidden; border: 1px solid rgba(159, 184, 201, .36); background: #1a1f1c; }
.brand-mark img { width: 100%; height: 100%; object-fit: cover; }
.brand-name { display: grid; gap: 1px; }
.brand-name strong { color: var(--paper); font-size: 18px; letter-spacing: .08em; }
.brand-name span { color: var(--steel); font: 500 9px/1 'IBM Plex Mono', monospace; letter-spacing: .16em; }
.nav-list { display: flex; align-items: center; gap: 2px; margin-left: auto; }
.nav-list a { position: relative; padding: 11px 12px; color: var(--muted); font-size: 13px; transition: color .18s var(--ease); }
.nav-list a:hover, .nav-list a[aria-current='page'] { color: var(--paper); }
.nav-list a:hover::after, .nav-list a[aria-current='page']::after { content: ''; position: absolute; left: 12px; right: 12px; bottom: 5px; height: 2px; background: var(--orange); }
.nav-toggle { display: none; background: none; color: var(--paper); padding: 8px; }

.search-strip { border-bottom: 1px solid var(--line); background: #151a17; }
.search-inner { min-height: 52px; display: flex; gap: 18px; align-items: center; }
.search-box { width: min(490px, 100%); display: flex; gap: 8px; align-items: center; border-bottom: 1px solid rgba(159, 184, 201, .5); padding-bottom: 5px; }
.search-box svg { color: var(--signal); width: 17px; height: 17px; }
.search-box input { width: 100%; border: 0; outline: 0; background: transparent; color: var(--paper); font-size: 13px; }
.search-box input::placeholder { color: #718078; }
.search-submit { background: none; color: var(--steel); cursor: pointer; font-size: 12px; }
.quick-tags { display: flex; gap: 8px; overflow: hidden; white-space: nowrap; }
.quick-tags button { background: none; color: #78857e; padding: 0; cursor: pointer; font-size: 11px; }
.quick-tags button::before { content: '#'; color: var(--orange); margin-right: 2px; }

.hero { min-height: 630px; position: relative; display: grid; align-items: end; isolation: isolate; background: #151917; }
.hero-media, .hero-media::after { position: absolute; inset: 0; z-index: -1; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; object-position: center; opacity: .74; }
.hero-media::after { content: ''; background: linear-gradient(90deg, #121513 0%, rgba(18, 21, 19, .94) 31%, rgba(18, 21, 19, .28) 71%, rgba(18, 21, 19, .7) 100%), linear-gradient(0deg, #121513 0%, transparent 42%); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 620px) 1fr; gap: 50px; padding: 90px 0 42px; }
.hero-content h1 { margin: 20px 0; max-width: 670px; font: 900 clamp(46px, 7vw, 88px)/.98 'Noto Serif SC', serif; letter-spacing: -.065em; }
.hero-content h1 em { color: var(--signal); font-style: normal; }
.hero-content p { max-width: 540px; margin: 0; color: #d4d8d3; font-size: 16px; }
.hero-action-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.clip-btn { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; padding: 0 18px; position: relative; border: 1px solid var(--orange); background: var(--orange); color: #fff; font-weight: 700; cursor: pointer; transition: transform .18s var(--ease), background .18s var(--ease); clip-path: polygon(0 0, 100% 0, 100% 73%, calc(100% - 10px) 100%, 0 100%); }
.clip-btn:hover { background: #ff7044; transform: translateY(-2px); }
.clip-btn.ghost { background: rgba(18, 21, 19, .35); border-color: rgba(238, 237, 230, .43); color: var(--paper); }
.clip-btn:active { transform: scale(.97); }
.hero-side-note { align-self: end; justify-self: end; width: min(100%, 260px); border-left: 1px solid var(--signal); padding: 14px 0 0 16px; color: var(--paper); }
.hero-side-note strong { display: block; color: var(--signal); font: 600 12px/1.5 'IBM Plex Mono', monospace; }
.hero-side-note span { display: block; margin-top: 7px; color: var(--steel); font-size: 12px; }
.hero-metrics { border-top: 1px solid var(--line); background: rgba(10, 12, 11, .72); }
.hero-metrics .wrap { display: grid; grid-template-columns: repeat(4, 1fr); }
.metric { padding: 17px 20px; border-left: 1px solid var(--line); }
.metric:first-child { border-left: 0; }
.metric strong { display: block; color: var(--paper); font: 600 25px/1 'IBM Plex Mono', monospace; }
.metric span { color: var(--steel); font-size: 11px; }

.video-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 18px; }
.video-card { grid-column: span 3; min-width: 0; background: #1b211e; border: 1px solid rgba(159,184,201,.22); transition: transform .22s var(--ease), border-color .22s var(--ease); }
.video-card:hover { transform: translateY(-5px); border-color: var(--signal); }
.video-art { position: relative; aspect-ratio: 16/9; overflow: hidden; background: #101310; }
.video-art::after { content: ''; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(0,0,0,.55), transparent 57%); opacity: .7; transition: opacity .2s; }
.video-card:hover .video-art::after { opacity: .25; }
.video-art img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s var(--ease); }
.video-card:hover .video-art img { transform: scale(1.05); }
.play-orb { position: absolute; z-index: 1; left: 50%; top: 50%; transform: translate(-50%, -42%) scale(.88); width: 52px; height: 52px; display: grid; place-items: center; border-radius: 50%; color: var(--ink); background: var(--signal); opacity: 0; transition: opacity .2s var(--ease), transform .2s var(--ease); }
.play-orb svg { width: 21px; margin-left: 2px; }
.video-card:hover .play-orb { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.timecode { position: absolute; z-index: 2; right: 9px; bottom: 8px; color: var(--paper); background: rgba(18,21,19,.82); padding: 3px 6px; font: 500 10px/1 'IBM Plex Mono', monospace; }
.video-info { padding: 14px; }
.video-info h3 { margin: 7px 0 8px; font-size: 15px; line-height: 1.45; }
.video-info p { margin: 0; color: var(--steel); font-size: 12px; }
.video-meta { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 10px; color: #859089; font: 10px/1.3 'IBM Plex Mono', monospace; }
.video-meta span::before { color: var(--orange); content: '•'; margin-right: 4px; }
.video-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 10px; }
.video-tags b { border: 1px solid rgba(159,184,201,.3); color: var(--steel); padding: 2px 5px; font: 500 9px/1.1 'IBM Plex Mono', monospace; font-weight: 500; }
.video-grid .video-card:nth-child(1), .video-grid .video-card:nth-child(6) { grid-column: span 6; }

.split-feature { display: grid; grid-template-columns: 1.12fr .88fr; min-height: 520px; }
.feature-image { position: relative; min-height: 440px; }
.feature-image img { width: 100%; height: 100%; object-fit: cover; }
.feature-image::after { content: ''; position: absolute; inset: 0; background: linear-gradient(90deg, transparent, rgba(18,21,19,.72)); }
.feature-copy { padding: clamp(32px, 6vw, 84px); background: #222825; display: flex; flex-direction: column; justify-content: center; }
.feature-copy h2 { margin: 15px 0; font: 900 clamp(32px, 4vw, 54px)/1.15 'Noto Serif SC', serif; }
.feature-copy p { color: var(--steel); max-width: 480px; }
.spec-list { margin: 20px 0 0; padding: 0; list-style: none; border-top: 1px solid rgba(159,184,201,.26); }
.spec-list li { display: flex; justify-content: space-between; gap: 18px; padding: 12px 0; border-bottom: 1px solid rgba(159,184,201,.16); color: var(--paper); font-size: 13px; }
.spec-list span { color: var(--signal); font: 500 11px 'IBM Plex Mono', monospace; }

.media-rail { display: grid; grid-template-columns: .83fr 1.17fr; gap: 18px; }
.rail-copy { padding: 28px; background: var(--orange); color: white; min-height: 305px; display: flex; flex-direction: column; justify-content: space-between; }
.rail-copy h3 { margin: 0; font: 900 33px/1.17 'Noto Serif SC', serif; }
.rail-copy p { margin: 16px 0; font-size: 13px; }
.rail-copy a { font: 600 11px 'IBM Plex Mono', monospace; letter-spacing: .1em; }
.rail-photo { position: relative; min-height: 305px; overflow: hidden; }
.rail-photo img { width: 100%; height: 100%; object-fit: cover; }
.rail-photo > div { position: absolute; inset: auto 0 0; padding: 20px; background: linear-gradient(0deg, rgba(0,0,0,.76), transparent); }
.rail-photo strong { font-size: 18px; }
.rail-photo span { display: block; margin-top: 3px; color: var(--steel); font: 10px 'IBM Plex Mono', monospace; }

.ai-grid { display: grid; grid-template-columns: minmax(0, 1.26fr) minmax(280px, .74fr); gap: 24px; }
.ai-visual { position: relative; min-height: 510px; border: 1px solid rgba(159,184,201,.26); overflow: hidden; }
.ai-visual img { width: 100%; height: 100%; object-fit: cover; }
.ai-panel { position: absolute; inset: auto 18px 18px; padding: 18px; background: rgba(18,21,19,.82); backdrop-filter: blur(8px); border-left: 2px solid var(--signal); }
.ai-panel h3 { margin: 0 0 5px; font-size: 17px; }
.ai-panel p { margin: 0; color: var(--steel); font-size: 12px; }
.ai-services { display: grid; gap: 10px; align-content: start; }
.service-card { padding: 19px 19px 17px; background: #1c211e; border: 1px solid rgba(159,184,201,.22); }
.service-card b { display: block; color: var(--signal); font: 600 10px 'IBM Plex Mono', monospace; }
.service-card h3 { margin: 9px 0 6px; font-size: 17px; }
.service-card p { margin: 0; color: var(--steel); font-size: 12px; }

.community-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 55px; align-items: center; }
.community-copy h2 { margin: 15px 0; font: 900 clamp(34px, 4.5vw, 60px)/1.1 'Noto Serif SC', serif; }
.community-copy p { color: #50605a; max-width: 540px; }
.community-points { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 24px; }
.community-points div { padding: 13px 0; border-top: 1px solid #b7bbb2; color: #304039; font-weight: 700; font-size: 14px; }
.community-points span { display: block; color: #707a74; margin-top: 3px; font-size: 11px; font-weight: 400; }
.community-json { background: #141815; color: var(--paper); padding: 26px; box-shadow: var(--shadow); }
.community-json pre { margin: 0; overflow: auto; color: var(--steel); font: 11px/1.85 'IBM Plex Mono', monospace; white-space: pre-wrap; }
.community-json .code-key { color: var(--signal); }
.community-json .code-value { color: #f4a080; }

.expert-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid rgba(18,21,19,.3); border-left: 1px solid rgba(18,21,19,.3); }
.expert-card { min-height: 345px; padding: 25px; background: #e5e4dc; border-right: 1px solid rgba(18,21,19,.3); border-bottom: 1px solid rgba(18,21,19,.3); display: flex; flex-direction: column; }
.expert-badge { color: var(--orange); font: 600 10px 'IBM Plex Mono', monospace; }
.expert-card h3 { margin: 20px 0 5px; font: 900 25px/1.2 'Noto Serif SC', serif; }
.expert-role { color: #56645c; font-size: 12px; }
.expert-card ul { padding: 0; list-style: none; margin: 18px 0; color: #536159; font-size: 12px; }
.expert-card li { margin-top: 5px; }
.expert-actions { display: flex; gap: 11px; margin-top: auto; }
.expert-actions a { color: var(--ink); border-bottom: 1px solid var(--orange); font-size: 12px; font-weight: 700; }

.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.partner { min-height: 108px; display: grid; place-items: center; padding: 20px; color: var(--steel); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); font: 600 13px 'IBM Plex Mono', monospace; letter-spacing: .04em; }
.partner b { color: var(--paper); font-size: 20px; margin-right: 8px; }
.howto { margin-top: 58px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.howto-step { position: relative; padding: 23px 22px 25px; border-top: 3px solid var(--signal); border-right: 1px solid var(--line); background: #1b211e; }
.howto-step:first-child { background: #222a25; }
.howto-step span { color: var(--signal); font: 600 12px 'IBM Plex Mono', monospace; }
.howto-step h3 { margin: 16px 0 7px; font-size: 18px; }
.howto-step p { margin: 0; color: var(--steel); font-size: 12px; }

.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 34px; margin-top: 52px; border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-question { width: 100%; padding: 18px 0; display: flex; justify-content: space-between; gap: 18px; text-align: left; background: none; color: var(--paper); cursor: pointer; font-weight: 700; }
.faq-question span { color: var(--signal); font: 500 18px/1 'IBM Plex Mono', monospace; }
.faq-answer { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .25s var(--ease); }
.faq-answer > div { overflow: hidden; }
.faq-answer p { margin: 0 0 18px; color: var(--steel); font-size: 13px; }
.faq-item.open .faq-answer { grid-template-rows: 1fr; }
.faq-item.open .faq-question span { transform: rotate(45deg); }

.contact-layout { display: grid; grid-template-columns: 1.08fr .92fr; border: 1px solid rgba(18,21,19,.24); }
.contact-photo { min-height: 510px; position: relative; }
.contact-photo img { width: 100%; height: 100%; object-fit: cover; }
.contact-photo div { position: absolute; inset: auto 0 0; padding: 25px; color: var(--paper); background: linear-gradient(0deg, rgba(0,0,0,.8), transparent); }
.contact-photo strong { font: 900 28px 'Noto Serif SC', serif; }
.contact-photo p { margin: 4px 0 0; color: var(--steel); font-size: 12px; }
.contact-info { padding: clamp(26px, 5vw, 62px); background: #e2e1d9; }
.contact-info h2 { margin: 14px 0 24px; font: 900 clamp(32px, 4vw, 52px)/1.15 'Noto Serif SC', serif; }
.contact-info dl { margin: 0; border-top: 1px solid #aeb2ab; }
.contact-info dl div { padding: 13px 0; display: grid; grid-template-columns: 88px 1fr; gap: 14px; border-bottom: 1px solid #b8bbb4; }
.contact-info dt { color: #68726b; font: 500 10px 'IBM Plex Mono', monospace; }
.contact-info dd { margin: 0; color: #18211d; font-size: 13px; font-weight: 700; }
.qr-row { display: flex; gap: 16px; margin-top: 25px; }
.qr-item { display: flex; gap: 9px; align-items: center; }
.qr-box { width: 54px; height: 54px; padding: 4px; background: #fff; }
.qr-item b { display: block; color: #314039; font-size: 12px; }
.qr-item span { color: #6a756d; font-size: 10px; }

.feedback-note { margin: 40px 0 0; border-left: 3px solid var(--orange); padding: 18px 20px; background: rgba(240,91,42,.08); color: #506059; font-size: 13px; }
.feedback-note strong { color: var(--ink); }

.breadcrumb { border-bottom: 1px solid var(--line); background: #151a17; }
.breadcrumb .wrap { min-height: 42px; display: flex; align-items: center; gap: 8px; color: var(--steel); font: 10px 'IBM Plex Mono', monospace; }
.breadcrumb a:hover { color: var(--signal); }
.page-hero { position: relative; padding: 94px 0 78px; background: #171d19; overflow: hidden; }
.page-hero::after { content: '麻豆视频'; position: absolute; right: -9px; bottom: -32px; color: rgba(159,184,201,.06); font: 900 clamp(54px, 13vw, 190px)/1 'IBM Plex Mono', monospace; white-space: nowrap; }
.page-hero h1 { position: relative; z-index: 1; max-width: 850px; margin: 17px 0 12px; font: 900 clamp(40px, 6vw, 76px)/1.05 'Noto Serif SC', serif; letter-spacing: -.055em; }
.page-hero p { position: relative; z-index: 1; max-width: 620px; color: var(--steel); }
.article-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) 320px; gap: 38px; }
.article-list { display: grid; gap: 18px; }
.article-card { display: grid; grid-template-columns: 245px 1fr; gap: 20px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.article-card img { width: 100%; height: 152px; object-fit: cover; }
.article-card h2 { margin: 7px 0 8px; font: 900 24px/1.3 'Noto Serif SC', serif; }
.article-card p { margin: 0; color: var(--steel); font-size: 13px; }
.side-stack { display: grid; align-content: start; gap: 15px; }
.side-card { padding: 20px; background: #1b211e; border-top: 2px solid var(--orange); }
.side-card h3 { margin: 0 0 10px; font-size: 17px; }
.side-card p, .side-card li { color: var(--steel); font-size: 12px; }
.side-card ul { padding-left: 17px; margin: 0; }

.footer { padding: 62px 0 22px; border-top: 1px solid var(--line); background: #0e110f; }
.footer-top { display: grid; grid-template-columns: 1.4fr .7fr .7fr; gap: 44px; }
.footer-brand p { max-width: 420px; color: var(--steel); font-size: 13px; }
.footer-title { margin: 0 0 14px; color: var(--paper); font-size: 13px; }
.footer-links { display: grid; gap: 8px; color: var(--steel); font-size: 12px; }
.footer-links a:hover { color: var(--signal); }
.share-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 17px; }
.share-row button { padding: 7px 9px; background: #1e2521; color: var(--steel); cursor: pointer; font: 500 10px 'IBM Plex Mono', monospace; transition: background .18s; }
.share-row button:hover { background: var(--orange); color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 18px; padding-top: 30px; margin-top: 40px; border-top: 1px solid var(--line); color: #748078; font: 10px 'IBM Plex Mono', monospace; }

.toast { position: fixed; z-index: 99; left: 50%; bottom: 22px; transform: translate(-50%, 30px); opacity: 0; pointer-events: none; padding: 11px 16px; background: var(--signal); color: var(--ink); font-weight: 800; font-size: 12px; box-shadow: var(--shadow); transition: opacity .18s var(--ease), transform .18s var(--ease); }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 980px) {
  .nav-list { display: none; position: absolute; left: 0; right: 0; top: 76px; padding: 12px 20px 18px; background: #151a17; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
  .nav-list.open { display: flex; }
  .nav-toggle { display: block; }
  .quick-tags { display: none; }
  .video-card, .video-grid .video-card:nth-child(1), .video-grid .video-card:nth-child(6) { grid-column: span 6; }
  .split-feature, .community-layout, .contact-layout { grid-template-columns: 1fr; }
  .feature-image { min-height: 360px; }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .partner-grid { grid-template-columns: repeat(2, 1fr); }
  .howto { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .howto-step { border: 0; }
  .article-grid { grid-template-columns: 1fr; }
  .side-stack { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 650px) {
  .wrap { width: min(100% - 28px, 1240px); }
  .status-strip .wrap { font-size: 9px; }
  .status-strip .wrap span:last-child { display: none; }
  .header-main { min-height: 66px; }
  .nav-list { top: 66px; }
  .search-inner { min-height: 49px; }
  .hero { min-height: 625px; }
  .hero-grid { grid-template-columns: 1fr; padding: 78px 0 32px; }
  .hero-side-note { justify-self: start; }
  .hero-metrics .wrap { grid-template-columns: 1fr 1fr; }
  .metric { border-top: 1px solid var(--line); }
  .metric:nth-child(odd) { border-left: 0; }
  .title-row { display: block; }
  .title-row p { margin-top: 15px; }
  .section { padding: 74px 0; }
  .video-grid { gap: 13px; }
  .video-card, .video-grid .video-card:nth-child(1), .video-grid .video-card:nth-child(6) { grid-column: span 12; }
  .media-rail, .ai-grid { grid-template-columns: 1fr; }
  .ai-visual { min-height: 350px; }
  .community-points { grid-template-columns: 1fr; }
  .expert-grid, .partner-grid, .howto, .faq-list { grid-template-columns: 1fr; }
  .side-stack { grid-template-columns: 1fr; }
  .article-card { grid-template-columns: 1fr; }
  .article-card img { height: 190px; }
  .footer-top { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { display: block; line-height: 1.8; }
}

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