07Marquee CTA

<main class="stage">
  <div class="cta-band">
    <div class="cta-band__track">
      <span class="cta-band__item">Get started now —</span>
      <span class="cta-band__item">Get started now —</span>
      <span class="cta-band__item">Get started now —</span>
      <span class="cta-band__item">Get started now —</span>
      <span class="cta-band__item">Get started now —</span>
      <span class="cta-band__item">Get started now —</span>
      <span class="cta-band__item" aria-hidden="true">Get started now —</span>
      <span class="cta-band__item" aria-hidden="true">Get started now —</span>
      <span class="cta-band__item" aria-hidden="true">Get started now —</span>
      <span class="cta-band__item" aria-hidden="true">Get started now —</span>
      <span class="cta-band__item" aria-hidden="true">Get started now —</span>
      <span class="cta-band__item" aria-hidden="true">Get started now —</span>
    </div>
  </div>
</main>

@use "../../../../site/static/demo-tokens" as *;

$duration: $dur-loop;                              // 실제 서비스는 12~20s 가 보통. 데모는 gif 루프에 맞춰 2s 로 배속
$easing: linear;                                    // 등속
$color: $subject-cream;                            // 문구 색

@include stage($stage-orange);

.cta-band {
  width: min(440px, 94vw);
  overflow: hidden;
}
.cta-band__track {
  display: flex;
  width: max-content;
  animation: marquee-scroll $duration $easing infinite;
}
// 6개를 그대로 한 번 더 복제해 트랙 하나에 12개. 간격은 트랙의 gap 이 아니라 margin-right 로 —
// gap 은 12개 사이에 11번만 생겨 -50% 가 gap 의 절반만큼 모자라 한 바퀴마다 튄다 (028 실측, BD15)
.cta-band__item {
  margin-right: $sp-6;
  flex-shrink: 0;
  white-space: nowrap;
  color: $color;
  font-weight: 800;
  font-size: clamp(24px, 7vw, 40px);
  line-height: 1;
}

@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

@media (prefers-reduced-motion: reduce) {
  .cta-band__track { animation: none; transform: translateX(0); }
}

html, body {
  margin: 0;
  overflow: hidden;
}

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ff4d1f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.cta-band {
  width: min(440px, 94vw);
  overflow: hidden;
}

.cta-band__track {
  display: flex;
  width: max-content;
  animation: marquee-scroll 2s linear infinite;
}

.cta-band__item {
  margin-right: 24px;
  flex-shrink: 0;
  white-space: nowrap;
  color: #fff7e6;
  font-weight: 800;
  font-size: clamp(24px, 7vw, 40px);
  line-height: 1;
}

@keyframes marquee-scroll {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-50%);
  }
}
@media (prefers-reduced-motion: reduce) {
  .cta-band__track {
    animation: none;
    transform: translateX(0);
  }
}

import type { CSSProperties } from "react";
import styles from "./KineticCtaBand.module.scss";

export type KineticCtaBandProps = {
  phrase?: string;
  /** 한 바퀴 도는 시간(기본 2000ms) */
  duration?: number;
  easing?: string;
  color?: string;
};

type Vars = CSSProperties & { "--duration"?: string; "--easing"?: string; "--color"?: string };

export default function KineticCtaBand({
  phrase = "Get started now —",
  duration = 2000,
  easing = "linear",
  color = "#fff7e6",
}: KineticCtaBandProps) {
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };
  // 6개를 그대로 한 번 더 복제해 트랙 하나에 12개 — margin-right 간격, gap 은 쓰지 않는다 (이음새 점프 방지)
  const items = Array.from({ length: 12 }, (_, i) => i);

  return (
    <div className={styles.stage} style={vars}>
      <div className={styles.band}>
        <div className={styles.track}>
          {items.map((i) => (
            <span key={i} className={styles.item} aria-hidden={i >= 6 ? true : undefined}>{phrase}</span>
          ))}
        </div>
      </div>
    </div>
  );
}