:root {
  --bg: #f6f7f9;
  --bg-alt: #ffffff;
  --surface: #ffffff;
  --surface-2: #f2f4f7;
  --line: #e4e8ee;
  --line-2: #d3d9e2;
  --text: #141a22;
  --body: #3a4452;
  --muted: #667181;
  --accent: #ffd400;
  --accent-hover: #f5c800;
  --accent-ink: #141a22;
  --accent-text: #8a6500;
  --blue: #1e5bd6;
  --green: #12a150;
  --radius: 14px;
  --wrap: 1180px;
  --shadow: 0 1px 2px rgba(20,26,34,.04), 0 8px 24px -12px rgba(20,26,34,.12);
  --shadow-lg: 0 2px 4px rgba(20,26,34,.04), 0 24px 60px -24px rgba(20,26,34,.22);
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Noto Sans CJK SC", "Source Han Sans SC", "Helvetica Neue", Arial, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", Menlo, Consolas, "Roboto Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
h1, h2, h3 { line-height: 1.25; margin: 0; letter-spacing: .01em; }
h1, h2 { text-wrap: balance; }
p { margin: 0; }
.mono { font-family: var(--mono); }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.wrap.narrow { max-width: 860px; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 48px; padding: 0 22px; border-radius: 10px;
  font: 600 16px/1 var(--font); text-decoration: none; cursor: pointer;
  border: 1px solid transparent; transition: transform .15s ease, background .15s ease, border-color .15s ease, box-shadow .15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: var(--accent-ink); box-shadow: 0 6px 16px -8px rgba(200,160,0,.7); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-ghost { background: var(--surface); color: var(--text); border-color: var(--line-2); }
.btn-ghost:hover { border-color: var(--text); }
.btn-sm { height: 38px; padding: 0 16px; font-size: 14px; }
.btn-block { width: 100%; }
.btn:focus-visible, button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, summary:focus-visible {
  outline: 2px solid var(--blue); outline-offset: 2px;
}

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.86); backdrop-filter: saturate(160%) blur(10px); -webkit-backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-in { display: flex; align-items: center; gap: 24px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; flex-shrink: 0; }
.brand-mark { width: 30px; height: 30px; }
.brand-name { font-weight: 800; font-size: 18px; letter-spacing: .06em; }
.brand-sub { font-size: 12px; color: var(--muted); border-left: 1px solid var(--line-2); padding-left: 10px; }
.nav-links { display: flex; gap: 22px; margin-left: auto; }
.nav-links a { text-decoration: none; color: var(--body); font-size: 15px; }
.nav-links a:hover { color: var(--text); }

/* ---------- hero ---------- */
.hero {
  padding: 64px 0 72px; position: relative; overflow: hidden; background: var(--bg-alt);
  background-image:
    linear-gradient(rgba(20,26,34,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20,26,34,.045) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: -1px -1px;
}
.hero::after { content: ""; position: absolute; inset: auto 0 0 0; height: 120px; background: linear-gradient(transparent, var(--bg-alt)); pointer-events: none; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 48px; align-items: center; position: relative; z-index: 1; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; color: var(--text); background: var(--surface); border: 1px solid var(--line-2); padding: 4px 12px; border-radius: 999px; margin-bottom: 20px; }
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px rgba(255,212,0,.3); }
.hero h1 { font-size: clamp(32px, 3.7vw, 48px); font-weight: 800; }
.hero h1 em { font-style: normal; white-space: nowrap; background: linear-gradient(transparent 60%, rgba(255,212,0,.85) 60%, rgba(255,212,0,.85) 92%, transparent 92%); padding: 0 2px; }
.lead { margin-top: 20px; color: var(--body); font-size: 17px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin: 36px 0 0; padding-top: 24px; border-top: 1px solid var(--line); }
.stats dt { font: 700 30px/1.1 var(--mono); color: var(--text); }
.stats dt small { font-size: 15px; color: var(--muted); margin-left: 2px; }
.stats dd { margin: 6px 0 0; font-size: 12.5px; color: var(--muted); line-height: 1.5; }
.hint { text-align: center; font-size: 13px; color: var(--muted); margin-top: 10px; }

/* ---------- viewer (compare slider) ---------- */
.viewer { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-lg); }
.stage { position: relative; width: 100%; background: #fff; overflow: hidden; user-select: none; -webkit-user-select: none; touch-action: pan-y; }
.stage img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.lyr-after { position: absolute; inset: 0; background: #fff; clip-path: inset(0 0 0 var(--pos)); }
.lyr-lines-ov { display: none; }
.handle { position: absolute; top: 0; bottom: 0; left: var(--pos); width: 3px; margin-left: -1.5px; background: var(--accent); box-shadow: 0 0 0 1px rgba(20,26,34,.35); pointer-events: none; }
.handle span {
  position: absolute; top: 50%; left: 50%; width: 42px; height: 42px; margin: -21px 0 0 -21px; border-radius: 50%;
  background: var(--accent); border: 2px solid #fff; box-shadow: 0 4px 16px rgba(20,26,34,.35);
}
.handle span::before, .handle span::after {
  content: ""; position: absolute; top: 50%; width: 0; height: 0; margin-top: -6px; border: 6px solid transparent;
}
.handle span::before { left: 4px; border-right-color: var(--accent-ink); }
.handle span::after { right: 4px; border-left-color: var(--accent-ink); }
.range { position: absolute; inset: 0; width: 100%; height: 100%; margin: 0; opacity: 0; cursor: ew-resize; -webkit-appearance: none; appearance: none; touch-action: pan-y; }
.tag { position: absolute; top: 12px; font-size: 12px; padding: 3px 10px; border-radius: 6px; pointer-events: none; }
.tag-l { left: 12px; background: rgba(20,26,34,.72); color: #fff; }
.tag-r { right: 12px; background: #fff; color: var(--text); border: 1px solid var(--line-2); }

.viewer[data-mode="overlay"] .lyr-after,
.viewer[data-mode="lines"] .lyr-after { clip-path: none; }
.viewer[data-mode="overlay"] .lyr-after { background: transparent; }
.viewer[data-mode="overlay"] .lyr-lines { display: none; }
.viewer[data-mode="overlay"] .lyr-lines-ov { display: block; }
.viewer[data-mode="overlay"] .lyr-photo { filter: brightness(.62) saturate(.85); }
.viewer[data-mode="photo"] .lyr-after { display: none; }
.viewer:not([data-mode="compare"]) .handle,
.viewer:not([data-mode="compare"]) .range,
.viewer:not([data-mode="compare"]) .tag { display: none; }

.statusbar { display: flex; flex-wrap: wrap; gap: 6px 20px; padding: 10px 16px; font-size: 12.5px; color: var(--muted); border-top: 1px solid var(--line); background: var(--surface-2); }
.statusbar b { color: var(--text); font-weight: 600; }
.spinner { position: absolute; top: 50%; left: 50%; width: 34px; height: 34px; margin: -17px; border-radius: 50%; border: 3px solid rgba(20,26,34,.12); border-top-color: var(--text); animation: spin .8s linear infinite; display: none; }
.stage.loading .spinner { display: block; }
.stage.loading img { opacity: .35; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- sections ---------- */
.section { padding: 96px 0; border-top: 1px solid var(--line); }
.section-alt { background: var(--bg-alt); }
.sec-head { max-width: 880px; margin-bottom: 40px; }
.kicker { color: var(--accent-text); font-size: 13px; letter-spacing: .08em; margin-bottom: 12px; font-weight: 600; }
.sec-head h2, .contact-copy h2 { font-size: clamp(26px, 3vw, 36px); font-weight: 800; }
.sec-sub { margin-top: 14px; color: var(--body); font-size: 16.5px; }

.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); }
.cards4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.cards4 h3 { font-size: 18px; margin: 16px 0 10px; }
.cards4 p { color: var(--body); font-size: 15px; }
.ico { width: 44px; height: 44px; border-radius: 10px; display: grid; place-items: center; background: #fff7cc; border: 1px solid #f3dd75; }
.ico svg { width: 22px; height: 22px; fill: none; stroke: var(--text); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

/* ---------- cases ---------- */
.viewer-lg { margin-bottom: 18px; }
.viewer-top { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 16px 18px; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.case-title h3 { font-size: 20px; }
.case-title p { font-size: 14px; margin-top: 2px; }
.seg { display: inline-flex; background: var(--surface-2); border: 1px solid var(--line); border-radius: 10px; padding: 3px; }
.seg button { font: 500 14px/1 var(--font); color: var(--body); background: none; border: 0; padding: 9px 16px; border-radius: 7px; cursor: pointer; }
.seg button[aria-selected="true"] { background: var(--accent); color: var(--accent-ink); font-weight: 700; box-shadow: 0 1px 2px rgba(20,26,34,.15); }
.basis { padding: 12px 18px 16px; font-size: 14px; color: var(--body); }
.basis b { color: var(--text); font-weight: 600; }

.thumbs { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
.thumb { position: relative; padding: 0; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; cursor: pointer; background: #000; text-align: left; color: #fff; font: inherit; box-shadow: var(--shadow); }
.thumb img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; transition: transform .3s ease, opacity .2s ease; opacity: .85; }
.thumb:hover img { transform: scale(1.04); opacity: 1; }
.thumb span { position: absolute; left: 0; right: 0; bottom: 0; padding: 18px 10px 7px; font-size: 12.5px; line-height: 1.35; background: linear-gradient(transparent, rgba(0,0,0,.82)); }
.thumb[aria-current="true"] { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent); }
.thumb[aria-current="true"] img { opacity: 1; }

.sat { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); gap: 32px; margin-top: 64px; padding-top: 48px; border-top: 1px dashed var(--line-2); align-items: center; }
.sat h3 { font-size: 22px; margin-bottom: 12px; }
.sat p + p { margin-top: 12px; }
.sat-copy p { color: var(--body); }
.sat-copy p.muted { color: var(--muted); }
.sat-imgs { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.sat-imgs figure { margin: 0; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: #fff; box-shadow: var(--shadow); }
.sat-imgs figcaption { font-size: 12.5px; color: var(--muted); padding: 8px 10px; border-top: 1px solid var(--line); }

/* ---------- rectify ---------- */
.steps3 { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.steps3 li { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); position: relative; box-shadow: var(--shadow); }
.steps3 li:not(:last-child)::after {
  content: "→"; position: absolute; right: -17px; top: 28%; z-index: 2; width: 30px; height: 30px; border-radius: 50%;
  display: grid; place-items: center; background: var(--accent); color: var(--accent-ink); font-weight: 800; font-size: 15px; border: 2px solid #fff;
}
.steps3 figure { margin: 0; background: var(--surface-2); aspect-ratio: 16 / 9; overflow: hidden; border-radius: var(--radius) var(--radius) 0 0; border-bottom: 1px solid var(--line); }
.steps3 figure.dark { background: #fff; }
.steps3 figure img { width: 100%; height: 100%; object-fit: contain; }
.steps3 li > div { padding: 18px 20px 22px; }
.steps3 .num { font-size: 12px; color: var(--accent-text); letter-spacing: .08em; font-weight: 600; }
.steps3 h3 { font-size: 18px; margin: 4px 0 8px; }
.steps3 p { font-size: 14.5px; color: var(--body); }

/* ---------- deliverables ---------- */
.deliver-grid { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 36px; align-items: start; }
.sheet { margin: 0; }
.sheet-btn { display: block; position: relative; padding: 0; border: 1px solid var(--line-2); border-radius: var(--radius); overflow: hidden; background: #fff; cursor: zoom-in; width: 100%; box-shadow: var(--shadow-lg); }
.sheet-btn .zoom { position: absolute; right: 12px; bottom: 12px; font-size: 12px; padding: 4px 10px; border-radius: 6px; background: rgba(20,26,34,.78); color: #fff; }
.sheet figcaption { font-size: 13px; color: var(--muted); margin-top: 10px; }
.file-list { list-style: none; padding: 0; margin: 0 0 28px; display: grid; gap: 12px; }
.file-list li { display: flex; gap: 14px; align-items: flex-start; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; box-shadow: var(--shadow); }
.ext { flex-shrink: 0; width: 52px; text-align: center; font-size: 13px; font-weight: 700; color: var(--accent-ink); background: var(--accent); border-radius: 6px; padding: 4px 0; margin-top: 2px; }
.file-list li:nth-child(n+2) .ext { background: #eaf1ff; color: var(--blue); }
.file-list b { font-size: 15.5px; }
.file-list p { font-size: 14px; color: var(--body); margin-top: 2px; }
.mini { font-size: 15px; color: var(--muted); font-weight: 600; margin-bottom: 12px; }
.chips { list-style: none; padding: 0; margin: 0 0 16px; display: flex; flex-wrap: wrap; gap: 6px; }
.chips li { font: 12.5px/1 var(--mono); padding: 6px 9px; border-radius: 6px; background: var(--surface); border: 1px solid var(--line-2); color: var(--body); }
.chips-plain li { font-family: var(--font); font-size: 14px; padding: 9px 12px; }

/* ---------- standard ---------- */
.arrows { display: grid; grid-template-columns: repeat(8, 1fr); gap: 10px; margin-bottom: 28px; }
.arrow { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 18px 8px 12px; display: flex; flex-direction: column; align-items: center; gap: 10px; box-shadow: var(--shadow); }
.arrow svg { height: 108px; width: auto; }
.arrow svg path { fill: var(--text); }
.arrow b { font-size: 13.5px; font-weight: 600; }
.arrow span { font: 11.5px/1 var(--mono); color: var(--muted); }
.spec-wrap { display: grid; grid-template-columns: minmax(0, 8fr) minmax(0, 4fr); gap: 20px; align-items: stretch; }
.spec { width: 100%; border-collapse: separate; border-spacing: 0; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; font-size: 14.5px; box-shadow: var(--shadow); }
.spec th, .spec td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
.spec th { font-size: 13px; color: var(--muted); font-weight: 600; background: var(--surface-2); }
.spec tr:last-child td { border-bottom: 0; }
.spec td:first-child { font-weight: 600; white-space: nowrap; }
.spec td.mono { color: var(--accent-text); white-space: nowrap; font-size: 13.5px; font-weight: 600; }
.spec td:last-child { color: var(--body); }
.own-std { border: 1px dashed #e0b800; border-radius: var(--radius); padding: 26px; background: #fffbe6; display: flex; flex-direction: column; justify-content: center; }
.own-std h3 { font-size: 19px; margin-bottom: 10px; }
.own-std p { color: var(--body); font-size: 15px; }

/* ---------- process ---------- */
.flow { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; }
.flow li { position: relative; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 20px 18px; box-shadow: var(--shadow); }
.flow li > span { font-size: 13px; color: var(--accent-ink); background: var(--accent); border-radius: 6px; padding: 2px 7px; font-weight: 700; }
.flow h3 { font-size: 16.5px; margin: 14px 0 8px; }
.flow p { font-size: 14px; color: var(--body); }

/* ---------- pricing ---------- */
.price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.price { display: flex; flex-direction: column; }
.price .tier { font-size: 13px; color: var(--accent-text); letter-spacing: .1em; font-weight: 600; }
.price h3 { font-size: 21px; margin: 6px 0 18px; }
.price .btn { margin-top: auto; }
.price.featured { border: 2px solid var(--accent); background: linear-gradient(180deg, #fffbe6, var(--surface) 55%); }
.ticks { list-style: none; padding: 0; margin: 0 0 24px; display: grid; gap: 10px; }
.ticks li { position: relative; padding-left: 26px; font-size: 15px; color: var(--body); }
.ticks li::before { content: ""; position: absolute; left: 2px; top: 7px; width: 12px; height: 7px; border-left: 2px solid var(--green); border-bottom: 2px solid var(--green); transform: rotate(-45deg); }
.factors { margin-top: 32px; }

/* ---------- faq ---------- */
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { list-style: none; cursor: pointer; padding: 20px 40px 20px 0; font-size: 17px; font-weight: 600; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: 50%; transform: translateY(-50%); font: 400 24px/1 var(--mono); color: var(--muted); }
.faq details[open] summary::after { content: "−"; }
.faq details p { padding: 0 0 22px; color: var(--body); font-size: 15.5px; }

/* ---------- contact ---------- */
.contact-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 48px; align-items: start; }
.contact-list { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 12px; }
.contact-list li { display: flex; gap: 12px; align-items: baseline; font-size: 15.5px; }
.contact-list li span:first-child { color: var(--muted); width: 48px; flex-shrink: 0; font-size: 14px; }
.form { display: grid; gap: 16px; padding: 28px; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form label { display: grid; gap: 6px; font-size: 14px; color: var(--body); font-weight: 500; }
.form label i { color: #d23b3b; font-style: normal; }
.form input, .form select, .form textarea {
  width: 100%; font: 15.5px/1.5 var(--font); color: var(--text); background: #fff; border: 1px solid var(--line-2); border-radius: 9px; padding: 11px 12px;
}
.form textarea { resize: vertical; min-height: 100px; }
.form input::placeholder, .form textarea::placeholder { color: #9aa4b2; }
.form input:focus, .form select:focus, .form textarea:focus { border-color: var(--blue); outline: none; box-shadow: 0 0 0 3px rgba(30,91,214,.12); }
.form .invalid { border-color: #d23b3b; }
.hp { position: absolute !important; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-msg { font-size: 14.5px; min-height: 1.5em; }
.form-msg.ok { color: var(--green); }
.form-msg.err { color: #c62828; }

/* ---------- footer ---------- */
.footer { border-top: 1px solid var(--line); padding: 28px 0 40px; background: var(--bg-alt); }
.foot-in { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; align-items: center; }
.foot-in .brand-name { margin-right: 10px; font-size: 16px; }
.foot-in .muted { font-size: 14px; }

/* ---------- lightbox ---------- */
.lightbox { padding: 0; border: 0; background: transparent; max-width: 96vw; max-height: 94vh; }
.lightbox::backdrop { background: rgba(20,26,34,.72); }
.lightbox img { max-width: 96vw; max-height: 92vh; width: auto; height: auto; border-radius: 8px; box-shadow: 0 20px 60px rgba(0,0,0,.35); }
.lightbox .close { position: fixed; top: 14px; right: 18px; width: 44px; height: 44px; border-radius: 50%; border: 0; background: var(--accent); color: var(--accent-ink); font-size: 26px; line-height: 1; cursor: pointer; }

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .nav-links { display: none; }
  .brand-sub { display: none; }
  .nav-in { justify-content: space-between; }
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .cards4 { grid-template-columns: repeat(2, 1fr); }
  .arrows { grid-template-columns: repeat(4, 1fr); }
  .flow { grid-template-columns: repeat(3, 1fr); }
  .deliver-grid, .sat, .contact-grid, .spec-wrap { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .wrap { padding: 0 16px; }
  .section { padding: 64px 0; }
  .hero { padding: 36px 0 48px; }
  .stats { grid-template-columns: repeat(2, 1fr); row-gap: 18px; }
  .cards4, .price-grid, .steps3 { grid-template-columns: 1fr; }
  .steps3 li:not(:last-child)::after { content: "↓"; right: auto; left: 50%; top: auto; bottom: -17px; margin-left: -15px; }
  .thumbs { grid-template-columns: repeat(10, 160px); overflow-x: auto; padding: 4px 4px 10px; scroll-snap-type: x mandatory; }
  .thumb { scroll-snap-align: start; }
  .flow { grid-template-columns: 1fr 1fr; }
  .sat-imgs { grid-template-columns: 1fr; }
  .row2 { grid-template-columns: 1fr; }
  .form { padding: 20px; }
  .seg { width: 100%; }
  .seg button { flex: 1; padding: 9px 6px; }
  .hide-sm { display: none; }
  .spec td:first-child { white-space: normal; }
  .spec th, .spec td { padding: 10px 12px; }
  .spec td.mono { white-space: normal; }
  .btn-sm { padding: 0 12px; }
}
@media (max-width: 420px) {
  .arrows { grid-template-columns: repeat(2, 1fr); }
  .flow { grid-template-columns: 1fr; }
  .hero-cta .btn { width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}