/* ============================================================
   寄付フォーム 設計コンセプト — フォーム体験の前に通る1画面
   「これは、入力フォームではありません。」
   prefix: dfc-*  ·  builds on styles.css tokens
   ============================================================ */

.dfc { overflow-x: clip; }
.dfc-sec { padding: clamp(88px, 12vw, 168px) 0; }
.dfc-sec.tint { background: linear-gradient(180deg, var(--bg-1), var(--bg-0)); }

/* reveal */
.dfc-reveal { opacity: 0; }
.dfc-reveal.in { opacity: 1; }
@media (prefers-reduced-motion: no-preference) {
  .dfc-reveal { transform: translateY(16px); transition: opacity .8s var(--ease-out), transform .8s var(--ease-out); }
  .dfc-reveal.in { transform: none; }
  .dfc-reveal[data-d="1"] { transition-delay: .10s; }
  .dfc-reveal[data-d="2"] { transition-delay: .20s; }
  .dfc-reveal[data-d="3"] { transition-delay: .30s; }
}
@media (prefers-reduced-motion: reduce) { .dfc-reveal { opacity: 1; } }

/* shared type */
.dfc-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 11.5px; font-weight: 600;
  letter-spacing: .16em; text-transform: uppercase; color: var(--acc);
  margin-bottom: 28px;
}
.dfc-eyebrow::before { content: ""; width: 24px; height: 1px; background: var(--acc-line); }
.dfc-big {
  font-family: var(--font-serif); font-weight: 700;
  font-size: clamp(28px, 4.6vw, 54px); line-height: 1.44; letter-spacing: -0.005em;
  color: var(--text-0); text-wrap: balance; margin: 0;
}
.dfc-big .accent { color: var(--acc); }
.dfc-big .soft { color: var(--text-2); }
.dfc-sub {
  font-size: clamp(15px, 1.55vw, 17.5px); color: var(--text-1); line-height: 2.05;
  margin: 30px auto 0; max-width: 620px; text-wrap: pretty;
}

/* ============================================================
   HERO
   ============================================================ */
.dfc-hero { padding: clamp(96px, 13vw, 176px) 0 clamp(72px, 9vw, 120px); text-align: center; }
.dfc-hero h1 {
  font-family: var(--font-serif); font-weight: 700;
  font-size: clamp(34px, 6vw, 72px); line-height: 1.36; letter-spacing: -0.01em;
  color: var(--text-0); margin: 0; text-wrap: balance;
}
.dfc-hero h1 .accent { color: var(--acc); }
.dfc-hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-top: clamp(34px, 4.5vw, 52px); }
.dfc-hero-note { margin-top: 20px; font-size: 12.5px; color: var(--text-3); }

/* ============================================================
   MOMENT — 寄付はフォームの前に始まっている
   ============================================================ */
.dfc-moment { max-width: 880px; margin: 0 auto; text-align: center; }
.dfc-moment-line {
  display: flex; align-items: center; justify-content: center; flex-wrap: wrap;
  gap: 10px 14px; margin: clamp(36px, 5vw, 56px) 0 0;
}
.dfc-moment-src {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 13px; font-weight: 600; color: var(--text-1);
  padding: 9px 16px; border-radius: 999px;
  background: var(--bg-card); border: 1px solid var(--bd-2);
}
.dfc-moment-src i { color: var(--acc); font-size: 16px; }
.dfc-moment-arrow { color: var(--acc); font-size: 17px; }
.dfc-moment-feel {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-serif); font-size: 15.5px; font-weight: 700; color: var(--acc);
  padding: 10px 20px; border-radius: 999px;
  background: var(--acc-soft); border: 1px solid var(--acc-line);
}

/* ============================================================
   PRINCIPLES — 6つの設計
   ============================================================ */
.dfc-principles { max-width: 860px; margin: clamp(48px, 6vw, 80px) auto 0; display: flex; flex-direction: column; gap: 18px; }
.dfc-principle {
  display: grid; grid-template-columns: 84px 1fr; gap: clamp(18px, 3vw, 36px);
  padding: clamp(28px, 3.6vw, 42px) clamp(24px, 3.4vw, 44px);
  background: var(--bg-card); border: 1px solid var(--bd-1); border-radius: 22px;
  transition: border-color .25s var(--ease-out);
}
.dfc-principle:hover { border-color: var(--acc-line); }
.dfc-principle-n {
  font-family: var(--font-mono); font-size: clamp(24px, 3vw, 34px); font-weight: 700;
  color: var(--acc); line-height: 1; padding-top: 6px;
  display: flex; flex-direction: column; gap: 12px; align-items: flex-start;
}
.dfc-principle-n::after { content: ""; width: 26px; height: 1px; background: var(--acc-line); }
.dfc-principle h3 {
  font-family: var(--font-serif); font-size: clamp(20px, 2.5vw, 27px); font-weight: 700;
  color: var(--text-0); line-height: 1.55; margin: 0 0 12px; text-wrap: balance;
}
.dfc-principle h3 .accent { color: var(--acc); }
.dfc-principle p { font-size: 14px; color: var(--text-1); line-height: 2; margin: 0; text-wrap: pretty; }
.dfc-principle p b { color: var(--text-0); font-weight: 700; }
.dfc-try {
  display: inline-flex; align-items: baseline; gap: 9px;
  margin-top: 18px; padding: 10px 15px; border-radius: 11px;
  background: var(--acc-soft); border: 1px solid transparent;
  font-size: 12.5px; line-height: 1.7; color: var(--text-1);
}
.dfc-try .k {
  font-family: var(--font-mono); font-size: 10px; font-weight: 700;
  letter-spacing: .12em; color: var(--acc); text-transform: uppercase;
  white-space: nowrap; transform: translateY(-1px);
}
.dfc-try b { color: var(--text-0); font-weight: 700; }

/* ============================================================
   PHILOSOPHY — 会員を管理する時代は終わりました
   ============================================================ */
.dfc-philosophy { max-width: 840px; margin: 0 auto; text-align: center; }
.dfc-manifesto {
  font-family: var(--font-serif); font-weight: 700;
  font-size: clamp(24px, 3.6vw, 42px); line-height: 1.75;
  color: var(--text-0); margin: 0;
}
.dfc-manifesto .old { color: var(--text-3); display: block; font-size: 0.72em; font-weight: 500; margin-bottom: 18px; }
.dfc-manifesto .accent { color: var(--acc); }

/* ============================================================
   FINAL CTA
   ============================================================ */
.dfc-cta { text-align: center; }
.dfc-cta-btn { font-size: 16px; padding: 17px 34px; }
.dfc-cta-assure {
  display: flex; justify-content: center; flex-wrap: wrap; gap: 10px 22px;
  margin-top: 30px;
}
.dfc-cta-assure span {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 12.5px; color: var(--text-2);
}
.dfc-cta-assure i { color: var(--acc); font-size: 15px; }

/* ============================================================
   SCENE — 寄付のシーン（時刻つきの情景）
   ============================================================ */
.dfc-scenes { max-width: 720px; margin: clamp(40px, 5vw, 60px) auto 0; display: flex; flex-direction: column; gap: 14px; text-align: left; }
.dfc-scene {
  display: grid; grid-template-columns: 92px 1fr; grid-template-rows: auto auto;
  column-gap: 20px; row-gap: 8px; align-items: baseline;
  padding: 20px 26px; border-radius: 16px;
  background: var(--bg-card); border: 1px solid var(--bd-1);
}
.dfc-scene-when {
  font-family: var(--font-mono); font-size: 13px; font-weight: 700;
  color: var(--acc); white-space: nowrap;
  grid-row: 1;
}
.dfc-scene-tx {
  font-family: var(--font-serif); font-size: clamp(15.5px, 1.9vw, 18.5px); font-weight: 700;
  color: var(--text-0); line-height: 1.6; grid-row: 1;
}
.dfc-scene-ans {
  grid-column: 2; grid-row: 2;
  display: inline-flex; align-items: baseline; gap: 8px;
  font-size: 12.5px; color: var(--text-2); line-height: 1.7;
}
.dfc-scene-ans i { color: var(--acc); font-size: 14px; transform: translateY(1px); }
.dfc-scene-note {
  margin: clamp(30px, 4vw, 44px) auto 0; max-width: 560px;
  font-size: clamp(14.5px, 1.5vw, 16.5px); color: var(--text-1); line-height: 2;
}
.dfc-scene-note b { color: var(--text-0); font-weight: 700; }

/* ============================================================
   RHYTHM — 読む→答える→安心する→次へ進む
   ============================================================ */
.dfc-beats { max-width: 520px; margin: clamp(40px, 5vw, 60px) auto 0; display: flex; flex-direction: column; align-items: center; }
.dfc-beat {
  width: 100%; display: flex; align-items: baseline; gap: 18px;
  padding: 19px 26px; border-radius: 15px; text-align: left;
  background: var(--bg-card); border: 1px solid var(--bd-1);
}
.dfc-beat .n { font-family: var(--font-mono); font-size: 12.5px; font-weight: 700; color: var(--acc); flex-shrink: 0; width: 16px; }
.dfc-beat .t { font-family: var(--font-serif); font-size: clamp(18px, 2.2vw, 23px); font-weight: 700; color: var(--text-0); white-space: nowrap; }
.dfc-beat .s { font-size: 12.5px; color: var(--text-2); margin-left: auto; text-align: right; line-height: 1.7; }
.dfc-beat-ln { width: 1px; height: 26px; background: var(--acc-line); }

/* ============================================================
   AI ANALYSIS — 時間差の推定と認知心理学的な説明
   ============================================================ */
.dfc-ai-compare {
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: stretch;
  gap: clamp(14px, 2.4vw, 26px); max-width: 760px;
  margin: clamp(40px, 5vw, 60px) auto 0; text-align: left;
}
.dfc-ai-card {
  padding: clamp(24px, 3vw, 34px) clamp(22px, 2.8vw, 30px);
  border-radius: 18px; background: var(--bg-card); border: 1px solid var(--bd-1);
  display: flex; flex-direction: column; gap: 12px;
}
.dfc-ai-card.next { border-color: var(--acc-line); background: var(--acc-soft); }
.dfc-ai-tag {
  font-family: var(--font-mono); font-size: 11px; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase; color: var(--text-2);
}
.dfc-ai-card.next .dfc-ai-tag { color: var(--acc); }
.dfc-ai-time {
  font-family: var(--font-serif); font-weight: 700; line-height: 1;
  font-size: clamp(34px, 4.6vw, 50px); color: var(--text-0);
}
.dfc-ai-time small { font-size: 0.42em; font-weight: 700; margin-left: 4px; }
.dfc-ai-card.next .dfc-ai-time { color: var(--acc); }
.dfc-ai-card p { margin: 0; font-size: 13px; line-height: 1.95; color: var(--text-1); text-wrap: pretty; }
.dfc-ai-vs {
  align-self: center; font-family: var(--font-mono); font-size: 12px; font-weight: 700;
  color: var(--text-3); letter-spacing: .08em;
}
.dfc-ai-factors {
  max-width: 720px; margin: clamp(36px, 4.5vw, 52px) auto 0;
  display: flex; flex-direction: column; gap: 14px; text-align: left;
}
.dfc-ai-factor {
  padding: 22px 26px; border-radius: 16px;
  background: var(--bg-card); border: 1px solid var(--bd-1);
}
.dfc-ai-factor-k {
  display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap;
  font-family: var(--font-serif); font-size: clamp(16px, 1.9vw, 19px); font-weight: 700;
  color: var(--text-0); margin-bottom: 8px;
}
.dfc-ai-factor-k small {
  font-family: var(--font-mono); font-size: 10.5px; font-weight: 600;
  letter-spacing: .1em; text-transform: uppercase; color: var(--acc);
}
.dfc-ai-factor p { margin: 0; font-size: 13.5px; line-height: 2; color: var(--text-1); text-wrap: pretty; }
.dfc-ai-note {
  display: flex; align-items: baseline; gap: 10px; text-align: left;
  max-width: 620px; margin: clamp(30px, 4vw, 44px) auto 0;
  padding: 14px 18px; border-radius: 12px;
  background: var(--bg-card); border: 1px dashed var(--bd-2);
  font-size: 12.5px; line-height: 1.9; color: var(--text-2);
}
.dfc-ai-note i { color: var(--acc); font-size: 15px; transform: translateY(1px); flex-shrink: 0; }

/* ============================================================
   RACE — 2台のスマホで、同じ寄付を同時スタート（自動再現）
   ============================================================ */
.dfc-race { max-width: 920px; margin: clamp(44px, 5.5vw, 68px) auto 0; text-align: center; }
.dfc-race-title { font-family: var(--font-serif); font-size: clamp(19px, 2.4vw, 25px); font-weight: 700; color: var(--text-0); margin: 0; }
.dfc-race-sub { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .05em; color: var(--text-3); margin: 10px 0 0; }
.dfc-race-stage { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(10px, 2.4vw, 32px); margin-top: clamp(26px, 3.4vw, 40px); justify-items: center; align-items: start; }
.dfc-race-col { width: min(240px, 100%); }
.dfc-race-meta { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; margin-bottom: 10px; }
.dfc-race-tag { font-family: var(--font-mono); font-size: 10.5px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--text-2); text-align: left; }
.dfc-race-col.next .dfc-race-tag { color: var(--acc); }
.dfc-race-clock { font-family: var(--font-mono); font-size: clamp(15px, 2vw, 21px); font-weight: 700; color: var(--text-0); font-variant-numeric: tabular-nums; transition: color .3s; }
.dfc-race-col.finished .dfc-race-clock { color: #189a63; }
.dfc-race-status { margin: 12px 2px 0; font-size: 11px; color: var(--text-2); line-height: 1.7; text-align: left; min-height: 2.6em; }
.dfc-race-col.finished .dfc-race-status { color: #189a63; font-weight: 600; }
.dfc-race-verdict {
  margin: clamp(28px, 3.6vw, 40px) auto 0; max-width: 560px;
  font-family: var(--font-serif); font-size: clamp(17px, 2.2vw, 23px); font-weight: 700;
  color: var(--text-0); line-height: 1.8;
}
.dfc-race-verdict b { color: var(--acc); }
.dfc-race-verdict span { display: block; margin-top: 8px; font-family: var(--font-jp, inherit); font-size: 13px; font-weight: 400; color: var(--text-2); }
.dfc-race-replay {
  margin-top: 18px; display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--font-mono); font-size: 12px; font-weight: 600; color: var(--text-2);
  background: var(--bg-card); border: 1px solid var(--bd-2); border-radius: 999px;
  padding: 9px 18px; cursor: pointer; transition: color .25s, border-color .25s;
}
.dfc-race-replay:hover { color: var(--acc); border-color: var(--acc-line); }
.dfc-race-fair {
  margin: 22px auto 0; max-width: 560px;
  font-size: 11.5px; line-height: 1.9; color: var(--text-3); text-wrap: pretty;
}

/* phone frame */
.dfc-phone { border-radius: 32px; border: 1px solid var(--bd-2); background: var(--bg-card); padding: 8px; box-shadow: 0 20px 48px -26px rgba(0, 0, 0, .3); }
.dfc-phone-screen { height: 440px; border-radius: 25px; overflow: hidden; background: var(--bg-1); scroll-behavior: smooth; position: relative; text-align: left; }

/* typing caret */
.lf-i.typing::after, .nx-v.typing::after { content: "▍"; color: var(--acc); animation: dfcBlink 1s steps(1) infinite; }
@keyframes dfcBlink { 50% { opacity: 0; } }

/* legacy form（意図的に窮屈な従来型） */
.lf { padding: 12px 12px 18px; }
.lf-head { font-size: 12px; font-weight: 800; color: var(--text-0); padding: 7px 2px; border-bottom: 2px solid var(--bd-2); margin-bottom: 8px; }
.lf-note { font-size: 8.5px; color: var(--text-3); line-height: 1.65; margin-bottom: 10px; }
.lf-banner { background: rgba(214, 73, 73, .09); border: 1px solid rgba(214, 73, 73, .45); color: #d64949; border-radius: 6px; font-size: 9px; font-weight: 700; line-height: 1.6; padding: 7px 9px; margin-bottom: 10px; }
.lf-row { margin-bottom: 8px; border-radius: 6px; padding: 3px 4px; transition: background .25s; }
.lf-row.on { background: var(--acc-soft); }
.lf-l { font-size: 8.5px; color: var(--text-2); margin-bottom: 3px; }
.lf-req { color: #d64949; margin-right: 2px; }
.lf-i { height: 22px; border: 1px solid var(--bd-2); background: var(--bg-0); border-radius: 4px; font-family: var(--font-mono); font-size: 9.5px; color: var(--text-0); padding: 0 6px; line-height: 20px; white-space: nowrap; overflow: hidden; position: relative; }
.lf-i.sel::after { content: "▾"; position: absolute; right: 6px; color: var(--text-3); }
.lf-row.err .lf-i { border-color: #d64949; background: rgba(214, 73, 73, .06); }
.lf-zipwrap { display: flex; gap: 4px; align-items: stretch; }
.lf-zipwrap .lf-i { flex: 1; min-width: 0; }
.lf-zipbtn { flex-shrink: 0; border: 1px solid var(--bd-2); background: var(--bg-card); border-radius: 4px; font-size: 8px; font-weight: 700; color: var(--text-1); padding: 0 7px; line-height: 22px; white-space: nowrap; transition: transform .2s, border-color .2s; }
.lf-zipbtn.tap { transform: scale(.94); border-color: var(--acc); color: var(--acc); }
.lf-row.autofill .lf-i { color: var(--acc); border-color: var(--acc-line); animation: dfcFlash .9s var(--ease-out); }
.lf-err { font-size: 8px; color: #d64949; margin-top: 2px; line-height: 1.5; }
.lf-btn { margin-top: 14px; background: #78808f; color: #fff; border-radius: 5px; text-align: center; padding: 10px 0; font-size: 11px; font-weight: 700; transition: transform .2s; }
.lf-btn.tap { transform: scale(.97); }
.lf-done { height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px; padding: 0 16px; text-align: center; }
.lf-done-ic { width: 40px; height: 40px; border-radius: 50%; background: var(--bd-1); display: grid; place-items: center; font-size: 17px; color: var(--text-1); margin-bottom: 4px; }
.lf-done-t { font-size: 12px; font-weight: 700; color: var(--text-0); }
.lf-done-s { font-size: 9.5px; color: var(--text-3); }

/* PayAI NEXT（1画面ひとつのテーマ） */
.nx { padding: 15px 14px; height: 100%; display: flex; flex-direction: column; box-sizing: border-box; }
.nx-prog { height: 3px; background: var(--bd-1); border-radius: 99px; overflow: hidden; }
.nx-bar { display: block; height: 100%; width: 33%; background: var(--acc); border-radius: 99px; transition: width .6s var(--ease-out); }
.nx-steplbl { font-family: var(--font-mono); font-size: 9px; color: var(--text-3); letter-spacing: .06em; margin: 8px 0 12px; }
.nx-body { flex: 1; position: relative; }
.nx-scr { position: absolute; inset: 0; opacity: 0; transform: translateX(16px); transition: opacity .45s var(--ease-out), transform .45s var(--ease-out); pointer-events: none; }
.nx-scr.on { opacity: 1; transform: none; }
.nx-h { font-family: var(--font-serif); font-size: 15px; font-weight: 700; color: var(--text-0); margin-bottom: 6px; }
.nx-s { font-size: 10px; color: var(--text-2); line-height: 1.85; margin-bottom: 12px; }
.nx-amts { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.nx-amt { border: 1.5px solid var(--bd-2); background: var(--bg-0); border-radius: 12px; padding: 15px 0; text-align: center; font-size: 12.5px; font-weight: 700; color: var(--text-0); transition: all .25s; }
.nx-amt.tap { border-color: var(--acc); background: var(--acc-soft); color: var(--acc); transform: scale(.96); }
.nx-note { margin-top: 12px; font-size: 8.5px; color: var(--text-3); line-height: 1.7; }
.nx-row { display: grid; grid-template-columns: 64px 1fr 13px; align-items: center; gap: 6px; padding: 6px; border-radius: 8px; transition: background .25s; }
.nx-row.on { background: var(--acc-soft); }
.nx-l { font-size: 8.5px; color: var(--text-2); display: flex; align-items: center; gap: 4px; }
.nx-autotag { font-size: 7px; color: var(--acc); border: 1px solid var(--acc-line); border-radius: 99px; padding: 1px 5px; white-space: nowrap; }
.nx-v { height: 19px; border-bottom: 1px solid var(--bd-2); font-family: var(--font-mono); font-size: 9px; color: var(--text-0); line-height: 19px; white-space: nowrap; overflow: hidden; }
.nx-row.filled .nx-v { color: var(--acc); border-bottom-color: var(--acc-line); animation: dfcFlash .9s var(--ease-out); }
.nx-ok { font-size: 10px; font-weight: 800; color: #189a63; opacity: 0; transition: opacity .3s; }
.nx-row.ok .nx-ok { opacity: 1; }
.nx-crow { display: flex; justify-content: space-between; gap: 8px; font-size: 9.5px; padding: 8px 3px; border-bottom: 1px dashed var(--bd-1); }
.nx-cl { color: var(--text-3); white-space: nowrap; }
.nx-cv { color: var(--text-0); font-weight: 600; text-align: right; overflow: hidden; text-overflow: ellipsis; }
.nx-btn { margin-top: 16px; background: var(--acc); color: #fff; border-radius: 12px; text-align: center; padding: 12px 0; font-size: 12px; font-weight: 700; transition: transform .2s; }
.nx-btn.tap { transform: scale(.97); }
.nx-scr.fin { display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 0 10px; }
.nx-scr.fin .nx-s { margin-bottom: 0; }
.nx-heart { width: 50px; height: 50px; border-radius: 50%; background: var(--acc-soft); border: 1px solid var(--acc-line); display: grid; place-items: center; color: var(--acc); font-size: 23px; margin-bottom: 12px; }
@keyframes dfcFlash { 0% { background: var(--acc-soft); } 100% { background: transparent; } }

/* 3Dセキュア 2.0 中間画面 */
.tds { position: absolute; inset: 0; z-index: 6; display: flex; align-items: center; justify-content: center; padding: 16px; background: color-mix(in srgb, var(--bg-1) 78%, transparent); backdrop-filter: blur(3px); opacity: 0; pointer-events: none; transition: opacity .35s var(--ease-out); }
.tds.on { opacity: 1; }
.tds-card { width: 100%; max-width: 190px; background: var(--bg-card); border: 1px solid var(--bd-2); border-radius: 14px; padding: 18px 14px; text-align: center; box-shadow: 0 14px 34px -18px rgba(0, 0, 0, .35); }
.tds-brand { font-family: var(--font-mono); font-size: 7.5px; letter-spacing: .14em; text-transform: uppercase; color: var(--text-3); margin-bottom: 10px; }
.tds-spin { width: 22px; height: 22px; margin: 0 auto 10px; border-radius: 50%; border: 2.5px solid var(--acc-line); border-top-color: var(--acc); animation: tdsSpin .9s linear infinite; }
.tds-t { font-family: var(--font-serif); font-size: 12.5px; font-weight: 700; color: var(--text-0); margin-bottom: 5px; }
.tds-s { font-size: 8.5px; line-height: 1.8; color: var(--text-2); margin-bottom: 10px; }
.tds-num { font-family: var(--font-mono); font-size: 8.5px; color: var(--text-1); letter-spacing: .08em; margin-bottom: 8px; }
.tds-foot { font-size: 7.5px; color: var(--text-3); border-top: 1px dashed var(--bd-1); padding-top: 8px; }
@keyframes tdsSpin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .tds-spin { animation: none; } }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 720px) {
  .dfc-race-stage { gap: 8px; }
  .dfc-phone { padding: 4px; border-radius: 20px; }
  .dfc-phone-screen { height: 340px; border-radius: 16px; }
  .nx-row { padding: 3px 6px; }
  .nx-v { height: 16px; line-height: 16px; }
  .dfc-race-status { font-size: 9.5px; min-height: 3.2em; }
  .dfc-race-tag { font-size: 8px; letter-spacing: .05em; }
  .dfc-race-clock { font-size: 13px; }
  .lf { padding: 8px 7px 12px; }
  .nx { padding: 10px 8px; }
}
@media (max-width: 640px) {
  .dfc-principle { grid-template-columns: 1fr; gap: 16px; }
  .dfc-principle-n { flex-direction: row; align-items: center; padding-top: 0; }
  .dfc-moment-arrow { width: 100%; transform: rotate(90deg); }
  .dfc-scene { grid-template-columns: 1fr; }
  .dfc-scene-tx { grid-row: 2; }
  .dfc-scene-ans { grid-column: 1; grid-row: 3; }
  .dfc-beat { flex-wrap: wrap; gap: 10px 14px; }
  .dfc-beat .s { margin-left: 30px; width: 100%; text-align: left; }
  .dfc-ai-compare { grid-template-columns: 1fr; }
  .dfc-ai-vs { display: none; }
}