02Center-stack badge hero

<main class="stage">
  <section class="hb is-demo" aria-label="Launch announcement first screen">
    <p class="hb__badge">
      <span class="hb__sheen" aria-hidden="true"></span>
      <svg viewBox="0 0 256 256" width="13" height="13" aria-hidden="true" focusable="false" fill="currentColor"><path d="M194.82,151.43l-55.09,20.3-20.3,55.09a7.92,7.92,0,0,1-14.86,0l-20.3-55.09-55.09-20.3a7.92,7.92,0,0,1,0-14.86l55.09-20.3,20.3-55.09a7.92,7.92,0,0,1,14.86,0l20.3,55.09,55.09,20.3A7.92,7.92,0,0,1,194.82,151.43Z" opacity="0.2"/><path d="M197.58,129.06,146,110l-19-51.62a15.92,15.92,0,0,0-29.88,0L78,110l-51.62,19a15.92,15.92,0,0,0,0,29.88L78,178l19,51.62a15.92,15.92,0,0,0,29.88,0L146,178l51.62-19a15.92,15.92,0,0,0,0-29.88ZM137,164.22a8,8,0,0,0-4.74,4.74L112,223.85,91.78,169A8,8,0,0,0,87,164.22L32.15,144,87,123.78A8,8,0,0,0,91.78,119L112,64.15,132.22,119a8,8,0,0,0,4.74,4.74L191.85,144ZM144,40a8,8,0,0,1,8-8h16V16a8,8,0,0,1,16,0V32h16a8,8,0,0,1,0,16H184V64a8,8,0,0,1-16,0V48H152A8,8,0,0,1,144,40ZM248,88a8,8,0,0,1-8,8h-8v8a8,8,0,0,1-16,0V96h-8a8,8,0,0,1,0-16h8V72a8,8,0,0,1,16,0v8h8A8,8,0,0,1,248,88Z"/></svg>
      <span class="hb__badge-t">Update of the week</span>
    </p>

    <h1 class="hb__title">New features land here first</h1>
    <p class="hb__lead">Sign up and try them before the public release.</p>

    <div class="hb__actions">
      <a class="hb__btn hb__btn--solid" href="#">Request access</a>
      <a class="hb__btn hb__btn--line" href="#">See what changed</a>
    </div>

    <!-- Trust marks — 실제 로고가 아니라 둥근 사각형 안에 일반 아이콘 + 일반명사 라벨 -->
    <ul class="hb__trust" aria-label="Trust marks">
      <li class="hb__mark hb__mark--1">
        <span class="hb__tile">
          <svg viewBox="0 0 256 256" width="15" height="15" aria-hidden="true" focusable="false" fill="currentColor"><path d="M128,129.09V232a8,8,0,0,1-3.84-1l-88-48.16a8,8,0,0,1-4.16-7V80.2a8,8,0,0,1,.7-3.27Z" opacity="0.2"/><path d="M223.68,66.15,135.68,18h0a15.88,15.88,0,0,0-15.36,0l-88,48.17a16,16,0,0,0-8.32,14v95.64a16,16,0,0,0,8.32,14l88,48.17a15.88,15.88,0,0,0,15.36,0l88-48.17a16,16,0,0,0,8.32-14V80.18A16,16,0,0,0,223.68,66.15ZM128,32h0l80.34,44L128,120,47.66,76ZM40,90l80,43.78v85.79L40,175.82Zm96,129.57V133.82L216,90v85.78Z"/></svg>
        </span>
        <span class="hb__ml">Blocks</span>
      </li>
      <li class="hb__mark hb__mark--2">
        <span class="hb__tile">
          <svg viewBox="0 0 256 256" width="15" height="15" aria-hidden="true" focusable="false" fill="currentColor"><path d="M128,112a36,36,0,1,1,36-36A36,36,0,0,1,128,112Zm60,24a36,36,0,1,0,36,36A36,36,0,0,0,188,136ZM68,136a36,36,0,1,0,36,36A36,36,0,0,0,68,136Z" opacity="0.2"/><path d="M172,76a44,44,0,1,0-44,44A44.05,44.05,0,0,0,172,76Zm-44,28a28,28,0,1,1,28-28A28,28,0,0,1,128,104Zm60,24a44,44,0,1,0,44,44A44.05,44.05,0,0,0,188,128Zm0,72a28,28,0,1,1,28-28A28,28,0,0,1,188,200ZM68,128a44,44,0,1,0,44,44A44.05,44.05,0,0,0,68,128Zm0,72a28,28,0,1,1,28-28A28,28,0,0,1,68,200Z"/></svg>
        </span>
        <span class="hb__ml">Links</span>
      </li>
      <li class="hb__mark hb__mark--3">
        <span class="hb__tile">
          <svg viewBox="0 0 256 256" width="15" height="15" aria-hidden="true" focusable="false" fill="currentColor"><path d="M160,128a32,32,0,1,1-32-32A32,32,0,0,1,160,128Z" opacity="0.2"/><path d="M232,120h-8.34A96.14,96.14,0,0,0,136,32.34V24a8,8,0,0,0-16,0v8.34A96.14,96.14,0,0,0,32.34,120H24a8,8,0,0,0,0,16h8.34A96.14,96.14,0,0,0,120,223.66V232a8,8,0,0,0,16,0v-8.34A96.14,96.14,0,0,0,223.66,136H232a8,8,0,0,0,0-16Zm-96,87.6V200a8,8,0,0,0-16,0v7.6A80.15,80.15,0,0,1,48.4,136H56a8,8,0,0,0,0-16H48.4A80.15,80.15,0,0,1,120,48.4V56a8,8,0,0,0,16,0V48.4A80.15,80.15,0,0,1,207.6,120H200a8,8,0,0,0,0,16h7.6A80.15,80.15,0,0,1,136,207.6ZM128,88a40,40,0,1,0,40,40A40,40,0,0,0,128,88Zm0,64a24,24,0,1,1,24-24A24,24,0,0,1,128,152Z"/></svg>
        </span>
        <span class="hb__ml">Accuracy</span>
      </li>
      <li class="hb__mark hb__mark--4">
        <span class="hb__tile">
          <svg viewBox="0 0 256 256" width="15" height="15" aria-hidden="true" focusable="false" fill="currentColor"><path d="M232,56v64L168,56Z" opacity="0.2"/><path d="M232,48H168a8,8,0,0,0-5.66,13.66L188.69,88,136,140.69l-34.34-34.35a8,8,0,0,0-11.32,0l-72,72a8,8,0,0,0,11.32,11.32L96,123.31l34.34,34.35a8,8,0,0,0,11.32,0L200,99.31l26.34,26.35A8,8,0,0,0,240,120V56A8,8,0,0,0,232,48Zm-8,52.69L187.31,64H224Z"/></svg>
        </span>
        <span class="hb__ml">Growth</span>
      </li>
    </ul>
  </section>
</main>

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

// 275 히어로 팔레트 — 아홉 항목이 같은 값을 쓴다. 괄호 안은 실측 대비비
$hr-ink:    $stage-ink;      // 옐로 위 글자 12.63:1 · 알약과 타일의 면
$hr-paper:  $stage-paper;    // 잉크 면 위 글자·아이콘 18.24:1
$hr-yellow: $stage-yellow;   // 무대
$hr-violet: #9791c9;         // 포커스 링 (옐로 위 3.28:1 — 글자로는 쓰지 않는다)

$duration: $dur-loop;        // 빛줄기가 한 번 지나가고 신뢰 표시 넷이 차례로 들리는 한 바퀴
$easing:   $ease-out;        // 빛줄기의 등속에 가까운 흐름
$color:    $hr-ink;          // 옐로 무대 위 글자는 전부 잉크 (흰 글자는 1.44:1 이라 금지)

@include stage($hr-yellow);

// 센터 스택 — 배지 · 제목 · 설명 · 버튼 쌍 · 신뢰 표시가 한 축에 쌓인다
.hb {
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: $sp-3;
  width: clamp(288px, 94vw, 432px);
  text-align: center;
}

// ── 새 소식 배지 — 빛줄기가 지나갈 수 있게 overflow 를 닫는다 ──
.hb__badge {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  gap: $sp-1;
  margin: 0;
  padding: $sp-1 $sp-3;
  border-radius: $r-pill;
  background: $color;
  color: $hr-paper;
  font-weight: 700;
  font-size: clamp(9px, 2vw, 11px);
  line-height: 1.3;
}

.hb__sheen {
  position: absolute;
  left: 0;
  top: 0;
  width: 40%;
  height: 100%;
  background: linear-gradient(100deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, .62) 50%, rgba(255, 255, 255, 0) 100%);
  transform: translateX(-160%);
}

.hb__title {
  margin: 0;
  color: $color;
  font-weight: 800;
  font-size: clamp(16px, 4.4vw, 27px);
  line-height: 1.16;
  letter-spacing: -.02em;
}

.hb__lead {
  margin: 0;
  color: $color;
  font-weight: 500;
  font-size: clamp(10px, 2.4vw, 13px);
  line-height: 1.35;
  opacity: .78;
}

.hb__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: $sp-2;
}

.hb__btn {
  display: inline-flex;
  align-items: center;
  padding: $sp-2 $sp-3;
  border: 2px solid $color;
  border-radius: $r-control;
  font-weight: 700;
  font-size: clamp(10px, 2.2vw, 12px);
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}
.hb__btn--solid { background: $color; color: $hr-paper; }
.hb__btn--line  { color: $color; }

// 터치·키보드에서도 같은 표시
.hb__btn:focus-visible {
  outline: 2px solid $hr-violet;
  outline-offset: 4px;
}

// ── 신뢰 표시 넷 — 실제 로고가 아니라 일반 도형 + 일반명사 라벨 ──
.hb__trust {
  display: flex;
  justify-content: center;
  gap: $sp-4;
  margin: 0;
  padding: 0;
  list-style: none;
}

.hb__mark {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: $sp-1;
}

.hb__tile {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: $r-control;
  background: $color;
  color: $hr-paper;
}

.hb__ml {
  color: $color;
  font-weight: 700;
  font-size: clamp(8px, 1.8vw, 10px);
  line-height: 1.2;
}

// ── 자동 재생 ─────────────────────────────────────────────
// animation 단축은 delay 를 0 으로 리셋하므로 낱개 속성으로 쓴다.
// 지연이 걸린 타일에는 animation-fill-mode: backwards 가 반드시 필요하다
.hb.is-demo .hb__sheen {
  animation-name: hbSheen;
  animation-duration: $duration;
  animation-timing-function: $easing;
  animation-iteration-count: infinite;
}

.hb.is-demo .hb__tile {
  animation-name: hbLift;
  animation-duration: $duration;
  animation-timing-function: $ease-spring;
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
}
.hb.is-demo .hb__mark--2 .hb__tile { animation-delay: .14s; }
.hb.is-demo .hb__mark--3 .hb__tile { animation-delay: .28s; }
.hb.is-demo .hb__mark--4 .hb__tile { animation-delay: .42s; }

// 빛줄기는 알약 밖(오른쪽)에서 멈춰 있다가 다음 바퀴에 왼쪽으로 되돌아간다 —
// overflow: hidden 이 닫고 있으므로 되감기가 화면에 보이지 않는다
@keyframes hbSheen {
  0%        { transform: translateX(-160%); }
  70%, 100% { transform: translateX(320%); }
}

// 들렸다 앉기 — 드는 쪽이 빠르고 앉는 쪽이 느려야 대표 이미지가 들린 장면이 된다.
// 복귀는 88% 안에 끝낸다 (24프레임의 마지막 장이 95.8% 지점)
@keyframes hbLift {
  0%        { transform: translateY(0); }
  16%, 46%  { transform: translateY(-7px); }
  88%, 100% { transform: translateY(0); }
}

// 좁은 화면 — 한 축을 유지한 채 글자·타일만 줄인다. 여기서는 간격을 올리지 않는다
@media (max-width: 340px), (max-height: 220px) {
  .hb { gap: $sp-1; width: 100%; }
  .hb__badge { padding: 0 $sp-2; }
  .hb__badge svg { width: 11px; height: 11px; }
  .hb__btn { padding: $sp-1 $sp-2; }
  .hb__trust { gap: $sp-2; }
  .hb__tile { width: 24px; height: 24px; border-radius: $r-sm; }
  .hb__tile svg { width: 13px; height: 13px; }
}

@media (prefers-reduced-motion: reduce) {
  // .hb.is-demo .hb__tile (0,3,0) 를 이기려면 !important 가 필요하다.
  // 움직임만 끄고 배지·타일·라벨은 그대로 남는다
  .hb__sheen, .hb__tile { animation: none !important; }
  .hb__sheen { opacity: 0 !important; }
}

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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ffd23f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.hb {
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  width: clamp(288px, 94vw, 432px);
  text-align: center;
}

.hb__badge {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 4px 12px;
  border-radius: 999px;
  background: #17141a;
  color: #ffffff;
  font-weight: 700;
  font-size: clamp(9px, 2vw, 11px);
  line-height: 1.3;
}

.hb__sheen {
  position: absolute;
  left: 0;
  top: 0;
  width: 40%;
  height: 100%;
  background: linear-gradient(100deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.62) 50%, rgba(255, 255, 255, 0) 100%);
  transform: translateX(-160%);
}

.hb__title {
  margin: 0;
  color: #17141a;
  font-weight: 800;
  font-size: clamp(16px, 4.4vw, 27px);
  line-height: 1.16;
  letter-spacing: -0.02em;
}

.hb__lead {
  margin: 0;
  color: #17141a;
  font-weight: 500;
  font-size: clamp(10px, 2.4vw, 13px);
  line-height: 1.35;
  opacity: 0.78;
}

.hb__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.hb__btn {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border: 2px solid #17141a;
  border-radius: 12px;
  font-weight: 700;
  font-size: clamp(10px, 2.2vw, 12px);
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

.hb__btn--solid {
  background: #17141a;
  color: #ffffff;
}

.hb__btn--line {
  color: #17141a;
}

.hb__btn:focus-visible {
  outline: 2px solid #9791c9;
  outline-offset: 4px;
}

.hb__trust {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.hb__mark {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.hb__tile {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 12px;
  background: #17141a;
  color: #ffffff;
}

.hb__ml {
  color: #17141a;
  font-weight: 700;
  font-size: clamp(8px, 1.8vw, 10px);
  line-height: 1.2;
}

.hb.is-demo .hb__sheen {
  animation-name: hbSheen;
  animation-duration: 2s;
  animation-timing-function: ease-out;
  animation-iteration-count: infinite;
}

.hb.is-demo .hb__tile {
  animation-name: hbLift;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
}

.hb.is-demo .hb__mark--2 .hb__tile {
  animation-delay: 0.14s;
}

.hb.is-demo .hb__mark--3 .hb__tile {
  animation-delay: 0.28s;
}

.hb.is-demo .hb__mark--4 .hb__tile {
  animation-delay: 0.42s;
}

@keyframes hbSheen {
  0% {
    transform: translateX(-160%);
  }
  70%, 100% {
    transform: translateX(320%);
  }
}
@keyframes hbLift {
  0% {
    transform: translateY(0);
  }
  16%, 46% {
    transform: translateY(-7px);
  }
  88%, 100% {
    transform: translateY(0);
  }
}
@media (max-width: 340px), (max-height: 220px) {
  .hb {
    gap: 4px;
    width: 100%;
  }
  .hb__badge {
    padding: 0 8px;
  }
  .hb__badge svg {
    width: 11px;
    height: 11px;
  }
  .hb__btn {
    padding: 4px 8px;
  }
  .hb__trust {
    gap: 8px;
  }
  .hb__tile {
    width: 24px;
    height: 24px;
    border-radius: 8px;
  }
  .hb__tile svg {
    width: 13px;
    height: 13px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .hb__sheen, .hb__tile {
    animation: none !important;
  }
  .hb__sheen {
    opacity: 0 !important;
  }
}

(function () {
  var root = document.querySelector('.hb');
  var btns = [].slice.call(root.querySelectorAll('.hb__btn'));

  function stopLoop() { root.classList.remove('is-demo'); }

  // 버튼 쌍은 좌우 화살표로 오간다 (Home·End 는 양 끝).
  // preventScroll 이 없으면 iframe 안 포커스가 부모 홈 페이지를 아래로 끌어당긴다
  btns.forEach(function (btn, i) {
    btn.addEventListener('keydown', function (e) {
      var to = -1;
      if (e.key === 'ArrowRight') { to = (i + 1) % btns.length; }
      if (e.key === 'ArrowLeft') { to = (i - 1 + btns.length) % btns.length; }
      if (e.key === 'Home') { to = 0; }
      if (e.key === 'End') { to = btns.length - 1; }
      if (to < 0) { return; }
      e.preventDefault();
      stopLoop();
      btns[to].focus({ preventScroll: true });
    });
  });

  root.addEventListener('pointerenter', stopLoop);
  root.addEventListener('focusin', stopLoop);
})();

import { useRef, useState } from "react";
import type { CSSProperties, ReactNode } from "react";
import styles from "./HeroCenterBadge.module.scss";

/* ambient 에 KeyboardEvent 가 없어 파일 안에 필요한 만큼만 선언한다 */
type KeyEvt = { key: string; preventDefault(): void };
type Box<T> = { current: T };

export type TrustMark = {
  /** 일반명사 라벨 — 실제 브랜드 이름을 쓰지 않는다 */
  label: string;
  icon: ReactNode;
};

export type HeroCenterBadgeProps = {
  badge?: string;
  title?: string;
  lead?: string;
  solid?: string;
  line?: string;
  trustLabel?: string;
  marks?: TrustMark[];
  sectionLabel?: string;
  /** 빛줄기가 한 번 지나가고 신뢰 표시 넷이 차례로 들리는 한 바퀴(ms) */
  duration?: number;
  easing?: string;
  /** 옐로 무대 위 글자·면의 색 — 잉크 고정을 권한다 (흰 글자는 1.44:1) */
  color?: string;
};

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

const CubeIcon = (): ReactNode => (
  <svg viewBox="0 0 256 256" width="15" height="15" aria-hidden="true" focusable="false" fill="currentColor">
    <path d="M128,129.09V232a8,8,0,0,1-3.84-1l-88-48.16a8,8,0,0,1-4.16-7V80.2a8,8,0,0,1,.7-3.27Z" opacity="0.2" />
    <path d="M223.68,66.15,135.68,18h0a15.88,15.88,0,0,0-15.36,0l-88,48.17a16,16,0,0,0-8.32,14v95.64a16,16,0,0,0,8.32,14l88,48.17a15.88,15.88,0,0,0,15.36,0l88-48.17a16,16,0,0,0,8.32-14V80.18A16,16,0,0,0,223.68,66.15ZM128,32h0l80.34,44L128,120,47.66,76ZM40,90l80,43.78v85.79L40,175.82Zm96,129.57V133.82L216,90v85.78Z" />
  </svg>
);

const CirclesIcon = (): ReactNode => (
  <svg viewBox="0 0 256 256" width="15" height="15" aria-hidden="true" focusable="false" fill="currentColor">
    <path d="M128,112a36,36,0,1,1,36-36A36,36,0,0,1,128,112Zm60,24a36,36,0,1,0,36,36A36,36,0,0,0,188,136ZM68,136a36,36,0,1,0,36,36A36,36,0,0,0,68,136Z" opacity="0.2" />
    <path d="M172,76a44,44,0,1,0-44,44A44.05,44.05,0,0,0,172,76Zm-44,28a28,28,0,1,1,28-28A28,28,0,0,1,128,104Zm60,24a44,44,0,1,0,44,44A44.05,44.05,0,0,0,188,128Zm0,72a28,28,0,1,1,28-28A28,28,0,0,1,188,200ZM68,128a44,44,0,1,0,44,44A44.05,44.05,0,0,0,68,128Zm0,72a28,28,0,1,1,28-28A28,28,0,0,1,68,200Z" />
  </svg>
);

const CrosshairIcon = (): ReactNode => (
  <svg viewBox="0 0 256 256" width="15" height="15" aria-hidden="true" focusable="false" fill="currentColor">
    <path d="M160,128a32,32,0,1,1-32-32A32,32,0,0,1,160,128Z" opacity="0.2" />
    <path d="M232,120h-8.34A96.14,96.14,0,0,0,136,32.34V24a8,8,0,0,0-16,0v8.34A96.14,96.14,0,0,0,32.34,120H24a8,8,0,0,0,0,16h8.34A96.14,96.14,0,0,0,120,223.66V232a8,8,0,0,0,16,0v-8.34A96.14,96.14,0,0,0,223.66,136H232a8,8,0,0,0,0-16Zm-96,87.6V200a8,8,0,0,0-16,0v7.6A80.15,80.15,0,0,1,48.4,136H56a8,8,0,0,0,0-16H48.4A80.15,80.15,0,0,1,120,48.4V56a8,8,0,0,0,16,0V48.4A80.15,80.15,0,0,1,207.6,120H200a8,8,0,0,0,0,16h7.6A80.15,80.15,0,0,1,136,207.6ZM128,88a40,40,0,1,0,40,40A40,40,0,0,0,128,88Zm0,64a24,24,0,1,1,24-24A24,24,0,0,1,128,152Z" />
  </svg>
);

const TrendUpIcon = (): ReactNode => (
  <svg viewBox="0 0 256 256" width="15" height="15" aria-hidden="true" focusable="false" fill="currentColor">
    <path d="M232,56v64L168,56Z" opacity="0.2" />
    <path d="M232,48H168a8,8,0,0,0-5.66,13.66L188.69,88,136,140.69l-34.34-34.35a8,8,0,0,0-11.32,0l-72,72a8,8,0,0,0,11.32,11.32L96,123.31l34.34,34.35a8,8,0,0,0,11.32,0L200,99.31l26.34,26.35A8,8,0,0,0,240,120V56A8,8,0,0,0,232,48Zm-8,52.69L187.31,64H224Z" />
  </svg>
);

const DEFAULT_MARKS: TrustMark[] = [
  { label: "구성", icon: <CubeIcon /> },
  { label: "연동", icon: <CirclesIcon /> },
  { label: "정확도", icon: <CrosshairIcon /> },
  { label: "성장", icon: <TrendUpIcon /> },
];

export default function HeroCenterBadge({
  badge = "이번 주 업데이트",
  title = "새 기능이 먼저 도착합니다",
  lead = "가입하면 공개 전에 미리 써 볼 수 있습니다.",
  solid = "지금 신청하기",
  line = "변경 내역 보기",
  trustLabel = "신뢰 표시",
  marks = DEFAULT_MARKS,
  sectionLabel = "출시 안내 첫 화면",
  duration = 2000,
  easing = "ease-out",
  color = "#17141a",
}: HeroCenterBadgeProps): ReactNode {
  const [loop, setLoop] = useState<boolean>(true);
  const refs = useRef<Array<HTMLAnchorElement | null>>([]) as Box<Array<HTMLAnchorElement | null>>;

  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };
  const tone = [styles.mark1, styles.mark2, styles.mark3, styles.mark4];

  /* 버튼 쌍은 좌우 화살표로 오간다. preventScroll 이 없으면 iframe 안 포커스가
     부모 페이지를 아래로 끌어당긴다 */
  const onKey = (e: KeyEvt, i: number): void => {
    const list = refs.current;
    if (!list) { return; }
    let to = -1;
    if (e.key === "ArrowRight") { to = (i + 1) % list.length; }
    if (e.key === "ArrowLeft") { to = (i - 1 + list.length) % list.length; }
    if (e.key === "Home") { to = 0; }
    if (e.key === "End") { to = list.length - 1; }
    if (to < 0) { return; }
    e.preventDefault();
    setLoop(false);
    const next = list[to];
    if (next) { next.focus({ preventScroll: true }); }
  };

  const labels = [solid, line];

  return (
    <section
      className={loop ? `${styles.hb} ${styles.isDemo}` : styles.hb}
      style={vars}
      aria-label={sectionLabel}
      onPointerEnter={() => setLoop(false)}
      onFocus={() => setLoop(false)}
    >
      <p className={styles.badge}>
        <span className={styles.sheen} aria-hidden="true" />
        <svg viewBox="0 0 256 256" width="13" height="13" aria-hidden="true" focusable="false" fill="currentColor">
          <path d="M194.82,151.43l-55.09,20.3-20.3,55.09a7.92,7.92,0,0,1-14.86,0l-20.3-55.09-55.09-20.3a7.92,7.92,0,0,1,0-14.86l55.09-20.3,20.3-55.09a7.92,7.92,0,0,1,14.86,0l20.3,55.09,55.09,20.3A7.92,7.92,0,0,1,194.82,151.43Z" opacity="0.2" />
          <path d="M197.58,129.06,146,110l-19-51.62a15.92,15.92,0,0,0-29.88,0L78,110l-51.62,19a15.92,15.92,0,0,0,0,29.88L78,178l19,51.62a15.92,15.92,0,0,0,29.88,0L146,178l51.62-19a15.92,15.92,0,0,0,0-29.88ZM137,164.22a8,8,0,0,0-4.74,4.74L112,223.85,91.78,169A8,8,0,0,0,87,164.22L32.15,144,87,123.78A8,8,0,0,0,91.78,119L112,64.15,132.22,119a8,8,0,0,0,4.74,4.74L191.85,144ZM144,40a8,8,0,0,1,8-8h16V16a8,8,0,0,1,16,0V32h16a8,8,0,0,1,0,16H184V64a8,8,0,0,1-16,0V48H152A8,8,0,0,1,144,40ZM248,88a8,8,0,0,1-8,8h-8v8a8,8,0,0,1-16,0V96h-8a8,8,0,0,1,0-16h8V72a8,8,0,0,1,16,0v8h8A8,8,0,0,1,248,88Z" />
        </svg>
        <span className={styles.badgeT}>{badge}</span>
      </p>

      <h1 className={styles.title}>{title}</h1>
      <p className={styles.lead}>{lead}</p>

      <div className={styles.actions}>
        {labels.map((t: string, i: number) => (
          <a
            className={`${styles.btn} ${i === 0 ? styles.btnSolid : styles.btnLine}`}
            href="#"
            key={t}
            ref={(el: HTMLAnchorElement | null) => { if (refs.current) { refs.current[i] = el; } }}
            onKeyDown={(e: KeyEvt) => onKey(e, i)}
          >
            {t}
          </a>
        ))}
      </div>

      {/* 신뢰 표시 — 실제 로고가 아니라 둥근 사각형 안에 일반 아이콘 + 일반명사 라벨 */}
      <ul className={styles.trust} aria-label={trustLabel}>
        {marks.map((m: TrustMark, i: number) => (
          <li className={`${styles.mark} ${tone[i % tone.length]}`} key={m.label}>
            <span className={styles.tile}>{m.icon}</span>
            <span className={styles.ml}>{m.label}</span>
          </li>
        ))}
      </ul>
    </section>
  );
}