:root {
  color-scheme: light;
  --ink: #071025;
  --muted: #657086;
  --line: rgba(42, 64, 102, 0.14);
  --paper: #f7f9ff;
  --blue: #001dff;
  --blue-2: #2f7cff;
  --cyan: #bdfcff;
  --green: #20c35a;
  --panel: rgba(255, 255, 255, 0.78);
  --shadow: 0 30px 90px rgba(0, 29, 255, 0.15);
}

@property --percent {
  syntax: "<number>";
  inherits: false;
  initial-value: 0;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 86% 4%, rgba(189, 252, 255, 0.76), transparent 24%),
    radial-gradient(circle at 18% 18%, rgba(0, 29, 255, 0.12), transparent 28%),
    linear-gradient(180deg, #ffffff 0%, var(--paper) 42%, #eef4ff 100%);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", "Yu Gothic", sans-serif;
  line-height: 1.75;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float-device {
  0%,
  100% {
    transform: translateY(0) rotate(-3deg);
  }
  50% {
    transform: translateY(-16px) rotate(-1.6deg);
  }
}

@keyframes drift {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes fill {
  from {
    width: 12%;
  }
}

@keyframes swipe {
  0%,
  100% {
    transform: rotate(7deg) translate(0, 0);
  }
  50% {
    transform: rotate(2deg) translate(12px, -12px);
  }
}

@keyframes flip-card-cycle {
  0%,
  34% {
    transform: rotateY(0deg) translateX(0) rotate(0deg);
  }
  48%,
  66% {
    transform: rotateY(180deg) translateX(0) rotate(0deg);
  }
  82% {
    transform: rotateY(180deg) translateX(140px) rotate(12deg);
  }
  100% {
    transform: rotateY(0deg) translateX(0) rotate(0deg);
  }
}

@keyframes swipe-label-known {
  0%,
  60%,
  100% {
    opacity: 0;
    transform: rotate(-12deg) scale(0.92);
  }
  72%,
  84% {
    opacity: 1;
    transform: rotate(-12deg) scale(1);
  }
}

@keyframes sound-ring {
  0% {
    box-shadow: 0 0 0 0 rgba(0, 29, 255, 0.28);
  }
  70%,
  100% {
    box-shadow: 0 0 0 18px rgba(0, 29, 255, 0);
  }
}

@keyframes heart-main {
  0%,
  45%,
  100% {
    opacity: 0;
    transform: scale(0.35);
  }
  58% {
    opacity: 1;
    transform: scale(1.18);
  }
  72% {
    opacity: 1;
    transform: scale(0.98);
  }
}

@keyframes heart-particle {
  0%,
  52% {
    opacity: 0;
    transform: translate(0, 0) scale(0.4);
  }
  76% {
    opacity: 0.92;
  }
  100% {
    opacity: 0;
    transform: translate(var(--x), var(--y)) scale(1.1);
  }
}

@keyframes favorite-burst {
  0% {
    opacity: 0;
    transform: scale(0.28) rotate(-10deg);
  }
  36% {
    opacity: 1;
    transform: scale(1.18) rotate(4deg);
  }
  100% {
    opacity: 0;
    transform: scale(1.42) translateY(-18px) rotate(8deg);
  }
}

@keyframes hero-heart-pop {
  0%,
  100% {
    transform: scale(0.92);
    opacity: 0.78;
  }
  48% {
    transform: scale(1.12);
    opacity: 1;
  }
}

@keyframes memory-ring-breathe {
  0%,
  100% {
    transform: scale(1);
    filter: saturate(1);
  }
  50% {
    transform: scale(1.05);
    filter: saturate(1.18);
  }
}

@keyframes page-slide {
  0%,
  100% {
    transform: translateX(0);
  }
  50% {
    transform: translateX(-18px);
  }
}

@keyframes gesture-swipe {
  0%,
  22%,
  100% {
    transform: translateX(0) rotate(-2deg);
  }
  46%,
  62% {
    transform: translateX(76px) rotate(10deg);
  }
}

@keyframes gesture-hand {
  0%,
  18%,
  100% {
    opacity: 0;
    transform: translate(-34px, 42px) scale(0.82);
  }
  28% {
    opacity: 1;
  }
  48%,
  66% {
    opacity: 1;
    transform: translate(42px, 32px) scale(1);
  }
}

@keyframes tutorial-swipe {
  0%,
  18%,
  100% {
    transform: translateX(-18px);
    opacity: 0;
  }
  32% {
    opacity: 1;
  }
  58%,
  76% {
    transform: translateX(54px);
    opacity: 1;
  }
}

@keyframes coach-chip {
  0%,
  18%,
  100% {
    opacity: 0;
    transform: translateY(6px) scale(0.96);
  }
  28%,
  46% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes coach-title {
  0%,
  6%,
  98%,
  100% {
    opacity: 0;
    transform: translateX(-50%) translateY(-6px);
  }
  12%,
  88% {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

@keyframes coach-tap-chip {
  0%,
  10%,
  26%,
  100% { opacity: 0; transform: translateY(6px) scale(0.96); }
  14%,
  22% { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes coach-right-chip {
  0%,
  34%,
  50%,
  100% { opacity: 0; transform: translateY(6px) scale(0.96); }
  38%,
  46% { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes coach-up-chip {
  0%,
  59%,
  75%,
  100% { opacity: 0; transform: translateY(6px) scale(0.96); }
  63%,
  71% { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes coach-left-chip {
  0%,
  84% { opacity: 0; transform: translateY(6px) scale(0.96); }
  88%,
  96% { opacity: 1; transform: translateY(0) scale(1); }
  100% { opacity: 0; transform: translateY(6px) scale(0.96); }
}

@keyframes coach-dot {
  0%,
  10% {
    opacity: 0;
    transform: translate(0, 0) scale(0.72);
  }
  14%,
  20% {
    opacity: 1;
    transform: translate(0, 24px) scale(1);
  }
  25% {
    opacity: 0;
    transform: translate(0, 24px) scale(0.8);
  }
  30% {
    opacity: 0;
    transform: translate(0, 0) scale(0.72);
  }
  38%,
  44% {
    opacity: 1;
    transform: translate(86px, 0) scale(1);
  }
  50% {
    opacity: 0;
    transform: translate(86px, 0) scale(0.8);
  }
  55% {
    opacity: 0;
    transform: translate(0, 0) scale(0.72);
  }
  63%,
  69% {
    opacity: 1;
    transform: translate(0, -92px) scale(1);
  }
  75% {
    opacity: 0;
    transform: translate(0, -92px) scale(0.8);
  }
  80% {
    opacity: 0;
    transform: translate(0, 0) scale(0.72);
  }
  88%,
  94% {
    opacity: 1;
    transform: translate(-86px, 0) scale(1);
  }
  100% {
    opacity: 0;
    transform: translate(-86px, 0) scale(0.8);
  }
}

@keyframes tutorial-chip {
  0%,
  18%,
  100% {
    opacity: 0;
    transform: translateY(8px);
  }
  32%,
  76% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes ai-core-pulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(0, 29, 255, 0.22);
    transform: scale(1);
  }
  50% {
    box-shadow: 0 0 0 18px rgba(0, 29, 255, 0);
    transform: scale(1.03);
  }
}

@keyframes ai-flow {
  0%,
  18% {
    opacity: 0;
    transform: translateX(-10px) scale(0.96);
  }
  34%,
  72% {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
  100% {
    opacity: 0.5;
    transform: translateX(8px) scale(0.98);
  }
}

@keyframes ai-card-rise {
  0%,
  24% {
    opacity: 0.72;
    transform: translateY(10px) scale(0.98);
  }
  48%,
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes ai-talk-cycle {
  0%,
  18%,
  100% {
    opacity: 0.35;
    transform: translateX(-8px);
  }
  28%,
  58% {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes ai-image-scan {
  0%,
  100% {
    transform: translateY(-10%) rotate(10deg);
    opacity: 0.26;
  }
  50% {
    transform: translateY(92%) rotate(10deg);
    opacity: 0.72;
  }
}

@keyframes ai-image-pop {
  0%,
  100% {
    transform: scale(0.96);
  }
  50% {
    transform: scale(1.03);
  }
}

@keyframes ai-image-zoom {
  0%,
  100% {
    background-position: center, center;
    background-size: 100% 100%, 112% auto;
  }
  50% {
    background-position: center, 52% 48%;
    background-size: 100% 100%, 123% auto;
  }
}

@keyframes ai-knowledge-pop {
  0%,
  18%,
  100% {
    opacity: 0.45;
    transform: translateY(8px) scale(0.96);
  }
  30%,
  62% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes mini-forget-curve {
  0% {
    stroke-dashoffset: 190;
  }
  42%,
  100% {
    stroke-dashoffset: 0;
  }
}

@keyframes mini-curve-dot {
  0%,
  34% {
    opacity: 0;
    transform: scale(0.7);
  }
  46%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes detail-image-focus {
  0%,
  100% {
    transform: scale(1);
    filter: saturate(1);
  }
  50% {
    transform: scale(1.07);
    filter: saturate(1.14);
  }
}

@keyframes count-bump {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.08);
  }
}

@keyframes bar-grow {
  from {
    transform: scaleY(0.28);
  }
  to {
    transform: scaleY(1);
  }
}

@keyframes count-cycle {
  0%,
  18% {
    opacity: 0.28;
    transform: translateY(8px) scale(0.94);
  }
  32%,
  66% {
    opacity: 1;
    transform: translateY(0) scale(1.06);
  }
  82%,
  100% {
    opacity: 0.38;
    transform: translateY(-6px) scale(0.98);
  }
}

@keyframes count-row-focus {
  0%,
  18%,
  100% {
    background: rgba(255, 255, 255, 0.78);
    transform: translateX(0);
  }
  34%,
  64% {
    background: #fff;
    transform: translateX(4px);
    box-shadow: 0 14px 28px rgba(0, 29, 255, 0.11);
  }
}

@keyframes count-number-increase {
  0%,
  28% {
    transform: scale(1);
    background: rgba(0, 29, 255, 0.12);
    color: var(--blue);
  }
  46% {
    transform: scale(1.18);
    background: var(--blue);
    color: white;
  }
  64%,
  100% {
    transform: scale(1);
    background: var(--blue);
    color: white;
  }
}

@keyframes count-before-fade {
  0%,
  38% {
    opacity: 1;
    transform: translateY(0);
  }
  44%,
  100% {
    opacity: 0;
    transform: translateY(-8px);
  }
}

@keyframes count-after-rise {
  0%,
  50% {
    opacity: 0;
    transform: translateY(8px);
  }
  60%,
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes count-meter-grow {
  0%,
  30% {
    width: calc(var(--meter) - 22%);
  }
  58%,
  100% {
    width: var(--meter);
  }
}

@keyframes curve-draw {
  from {
    stroke-dashoffset: 430;
  }
  to {
    stroke-dashoffset: 0;
  }
}

@keyframes dot-pulse {
  0%,
  100% {
    transform: scale(0.86);
    opacity: 0.55;
  }
  50% {
    transform: scale(1.25);
    opacity: 1;
  }
}

@keyframes mini-swipe-away {
  0%,
  100% {
    transform: rotate(-2deg) translate(0, 0);
  }
  34% {
    transform: rotate(8deg) translate(58px, 0);
  }
  62% {
    transform: rotate(0deg) translate(0, -36px) scale(0.96);
  }
}

@keyframes swipe-known-label {
  0%,
  16%,
  54%,
  100% {
    opacity: 0;
    transform: translateX(8px) scale(0.94);
  }
  25%,
  42% {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
}

@keyframes swipe-mastered-label {
  0%,
  48%,
  88%,
  100% {
    opacity: 0;
    transform: translate(-50%, 8px) scale(0.94);
  }
  58%,
  76% {
    opacity: 1;
    transform: translate(-50%, 0) scale(1);
  }
}

@keyframes phone-enter {
  from {
    opacity: 0;
    transform: translateY(28px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes sound-pop {
  0% {
    box-shadow: 0 0 0 0 rgba(0, 122, 255, 0.32);
  }
  100% {
    box-shadow: 0 0 0 18px rgba(0, 122, 255, 0);
  }
}

@keyframes ios-screen-in {
  from {
    opacity: 0;
    transform: translateX(16px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes badge-pop {
  0% {
    transform: scale(0.92);
  }
  55% {
    transform: scale(1.08);
  }
  100% {
    transform: scale(1);
  }
}

@keyframes answer-known {
  to {
    opacity: 0;
    transform: translateX(260px) rotate(14deg);
  }
}

@keyframes answer-learning {
  to {
    opacity: 0;
    transform: translateX(-260px) rotate(-14deg);
  }
}

@keyframes answer-mastered {
  to {
    opacity: 0;
    transform: translateY(-260px) scale(0.96);
  }
}

@keyframes app-volume-glow {
  0%,
  100% {
    box-shadow: 0 0 0 rgba(189, 252, 255, 0);
  }
  45% {
    box-shadow: 0 0 34px rgba(189, 252, 255, 0.45);
  }
}

@keyframes volume-fill {
  0%,
  14% {
    transform: scaleX(0);
  }
  68%,
  100% {
    transform: scaleX(1);
  }
}

@keyframes volume-step {
  0%,
  16% {
    opacity: 0.42;
    transform: translateY(8px);
  }
  30%,
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes volume-arrow-down {
  0%,
  100% {
    transform: rotate(90deg) translateX(0);
  }
  50% {
    transform: rotate(90deg) translateX(6px);
  }
}

@keyframes volume-book-pop {
  0%,
  16% {
    opacity: 0.46;
    transform: translateY(10px) scale(0.96);
  }
  30%,
  72% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  100% {
    opacity: 0.76;
    transform: translateY(0) scale(1);
  }
}

@keyframes volume-flow-pulse {
  0%,
  24% {
    opacity: 0.2;
    transform: scaleX(0.2);
  }
  46%,
  100% {
    opacity: 1;
    transform: scaleX(1);
  }
}

@keyframes deal-pulse {
  0%,
  100% {
    transform: translateY(0);
    box-shadow: 0 18px 40px rgba(7, 16, 37, 0.1);
  }
  50% {
    transform: translateY(-4px);
    box-shadow: 0 24px 48px rgba(7, 16, 37, 0.16);
  }
}

@keyframes compare-glow {
  0%,
  100% {
    box-shadow: 0 0 0 rgba(0, 29, 255, 0);
  }
  50% {
    box-shadow: 0 0 28px rgba(0, 29, 255, 0.16);
  }
}

@keyframes volume-number {
  0%,
  18% {
    transform: translateY(10px) scale(0.94);
  }
  54%,
  100% {
    transform: translateY(0) scale(1);
  }
}

@keyframes volume-chip-simple {
  0%,
  14% {
    opacity: 0.42;
    transform: translateY(10px) scale(0.94);
  }
  30%,
  72% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  100% {
    opacity: 0.78;
    transform: translateY(0) scale(1);
  }
}

@keyframes paper-book-stack {
  0%,
  12% {
    opacity: 0;
    transform: translate(-18px, 16px) rotate(-5deg);
  }
  30%,
  78% {
    opacity: 1;
    transform: translate(0, 0) rotate(calc((var(--i) - 2.5) * 2deg));
  }
  100% {
    opacity: 0.72;
    transform: translate(0, 0) rotate(calc((var(--i) - 2.5) * 2deg));
  }
}

@keyframes level-bar-grow {
  0%,
  18% {
    opacity: 0.35;
    transform: scaleY(0.24);
  }
  46%,
  82% {
    opacity: 1;
    transform: scaleY(1);
  }
  100% {
    opacity: 0.82;
    transform: scaleY(0.92);
  }
}

@keyframes touch-step-rise {
  0%,
  22%,
  100% {
    transform: translateY(0);
    box-shadow: 0 12px 28px rgba(7, 16, 37, 0.05);
  }
  32%,
  50% {
    transform: translateY(-3px);
    box-shadow: 0 18px 36px rgba(0, 29, 255, 0.12);
  }
}

@keyframes book-collect {
  0%,
  58%,
  100% {
    opacity: 1;
    transform: translate(0, 0) rotate(var(--rotate));
  }
  76% {
    opacity: 0.18;
    transform: translate(210px, calc(var(--move-y) * 1px)) rotate(0deg) scale(0.72);
  }
}

@keyframes recall-flip {
  0%,
  32% {
    transform: rotateY(0deg);
  }
  48%,
  70% {
    transform: rotateY(180deg);
  }
  100% {
    transform: rotateY(360deg);
  }
}

@keyframes recall-label {
  0%,
  26%,
  82%,
  100% {
    opacity: 0;
    transform: translateY(8px) scale(0.94);
  }
  42%,
  68% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes science-curve {
  from {
    stroke-dashoffset: 320;
  }
  to {
    stroke-dashoffset: 0;
  }
}

@keyframes review-chip {
  0%,
  48%,
  100% {
    opacity: 0;
    transform: translate(-50%, 8px) scale(0.9);
  }
  62%,
  82% {
    opacity: 1;
    transform: translate(-50%, 0) scale(1);
  }
}

@keyframes orbit-sense {
  from {
    transform: rotate(0deg) translateX(44px) rotate(0deg);
  }
  to {
    transform: rotate(360deg) translateX(44px) rotate(-360deg);
  }
}

@keyframes feedback-ring {
  0%,
  28% {
    --percent: 34;
  }
  54%,
  100% {
    --percent: 92;
  }
}

@keyframes feedback-meter {
  0%,
  28% {
    width: 34%;
  }
  54%,
  100% {
    width: 92%;
  }
}

@keyframes feedback-plus {
  0%,
  34%,
  100% {
    opacity: 0;
    transform: translateY(12px) scale(0.82);
  }
  48%,
  70% {
    opacity: 1;
    transform: translateY(0) scale(1.08);
  }
}

html,
body {
  overscroll-behavior-x: none;
}

body {
  touch-action: pan-y;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
  -webkit-user-drag: none;
  user-select: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(18px, 4vw, 56px);
  background: rgba(255, 255, 255, 0.72);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(20px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 5px 10px 5px 5px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(0, 29, 255, 0.1);
  border-radius: 999px;
  font-weight: 900;
}

.brand img,
.download-section img {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  box-shadow: 0 10px 26px rgba(0, 29, 255, 0.18);
}

.brand img {
  width: 34px;
  height: 34px;
  border-radius: 9px;
}

.site-nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scrollbar-width: none;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  white-space: nowrap;
}

.site-nav::-webkit-scrollbar {
  display: none;
}

.site-nav a {
  padding: 8px 10px;
  background: rgba(0, 29, 255, 0.055);
  border: 1px solid rgba(0, 29, 255, 0.08);
  border-radius: 999px;
  color: #35415c;
}

.hero,
.proof-band,
.experience-section,
.value-section,
.ai-section,
.science-section,
.guide-section,
.motion-section,
.compare-section,
.screens-section,
.price-section,
.reviews-section,
.faq-section,
.download-section {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
}

.value-section,
.experience-section,
.ai-section,
.science-section,
.guide-section,
.motion-section,
.compare-section,
.screens-section,
.price-section,
.reviews-section,
.faq-section,
.download-section {
  scroll-margin-top: 96px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(380px, 0.9fr);
  gap: clamp(36px, 6vw, 88px);
  align-items: center;
  min-height: calc(100vh - 70px);
  padding: 64px 0 86px;
}

.hero-copy {
  animation: rise 0.7s ease both;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 950;
  letter-spacing: 0;
  text-transform: none;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 26px;
  font-size: clamp(50px, 6vw, 78px);
  line-height: 0.98;
  letter-spacing: 0;
}

h1 span {
  display: block;
  white-space: nowrap;
}

h2 {
  max-width: 13em;
  margin-bottom: 16px;
  font-size: clamp(34px, 4.4vw, 58px);
  line-height: 1.12;
  letter-spacing: 0;
}

h2 span {
  display: block;
}

h3 {
  margin-bottom: 10px;
  font-size: 24px;
  line-height: 1.35;
}

.lead {
  max-width: 680px;
  margin-bottom: 30px;
  color: #35415c;
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 650;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 30px;
}

.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 22px;
  border-radius: 12px;
  font-weight: 900;
}

.primary-button {
  background: var(--blue);
  color: white;
  box-shadow: 0 18px 44px rgba(0, 29, 255, 0.22);
}

.app-store-link::before {
  content: "";
  width: 16px;
  height: 20px;
  margin-right: 8px;
  background: currentColor;
  clip-path: polygon(42% 0, 58% 0, 58% 33%, 80% 10%, 94% 24%, 66% 52%, 100% 100%, 78% 100%, 55% 66%, 32% 100%, 8% 100%, 44% 50%, 10% 15%, 24% 2%, 42% 28%);
}

.secondary-button {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  color: var(--ink);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 680px;
  margin: 0;
}

.hero-metrics div {
  padding: 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 16px 40px rgba(7, 16, 37, 0.06);
}

.hero-metrics dt {
  color: var(--blue);
  font-size: 34px;
  font-weight: 950;
  line-height: 1;
}

.hero-metrics dd {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.product-stage {
  position: relative;
  min-height: 720px;
  display: grid;
  place-items: center;
  animation: rise 0.8s ease 0.08s both;
}

.device-shadow {
  position: absolute;
  width: 82%;
  height: 70%;
  background: linear-gradient(135deg, rgba(0, 29, 255, 0.2), rgba(189, 252, 255, 0.34));
  border-radius: 44px;
  filter: blur(18px);
}

.device {
  position: relative;
  z-index: 2;
  width: min(390px, 76vw);
  margin: 0;
  padding: 10px;
  background: #080b13;
  border-radius: 46px;
  box-shadow: var(--shadow);
  animation: float-device 7s ease-in-out infinite;
}

.device img {
  width: 100%;
  aspect-ratio: 1179 / 2556;
  object-fit: cover;
  border-radius: 36px;
}

.hero-detail-device {
  overflow: hidden;
}

.hero-detail-screen {
  aspect-ratio: 1179 / 2556;
  padding: 20px 16px 26px;
  overflow: hidden;
  background: #fff;
  border-radius: 36px;
  color: #111114;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
}

.hero-detail-nav {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  margin: -2px -4px 16px;
}

.hero-detail-nav span {
  font-size: 15px;
  font-weight: 800;
  text-align: center;
}

.hero-detail-nav i {
  width: 34px;
  height: 34px;
  background:
    radial-gradient(circle at 50% 42%, #ff2d55 0 29%, transparent 31%),
    radial-gradient(circle at 38% 36%, #ff2d55 0 19%, transparent 21%),
    radial-gradient(circle at 62% 36%, #ff2d55 0 19%, transparent 21%);
  animation: hero-heart-pop 3.2s ease-in-out infinite;
}

.hero-detail-head {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: start;
  margin-bottom: 14px;
}

.hero-detail-head b,
.hero-detail-head small,
.hero-detail-head strong {
  display: block;
}

.hero-detail-head b {
  display: flex;
  gap: 7px;
  align-items: baseline;
  overflow: hidden;
  font-size: 32px;
  font-weight: 850;
  line-height: 1.1;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.hero-detail-head b span {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  background: rgba(120, 120, 128, 0.12);
  border-radius: 999px;
  color: rgba(60, 60, 67, 0.58);
  font-size: 14px;
  animation: sound-pop 2.4s ease-in-out infinite;
}

.hero-detail-head small {
  margin-top: 3px;
  color: #6b7280;
  font-size: 17px;
}

.hero-detail-head strong {
  margin-top: 4px;
  font-size: 18px;
  line-height: 1.28;
}

.hero-detail-head p {
  display: flex;
  gap: 6px;
  margin: 8px 0 0;
}

.hero-detail-head p em {
  padding: 5px 9px;
  background: rgba(120, 120, 128, 0.12);
  border-radius: 999px;
  color: #6b7280;
  font-style: normal;
  font-size: 12px;
  font-weight: 800;
}

.hero-detail-head mark {
  display: grid;
  place-items: center;
  width: 74px;
  height: 74px;
  background:
    radial-gradient(circle at center, #fff 0 58%, transparent 59%),
    conic-gradient(#34c759 74%, rgba(60, 60, 67, 0.18) 0);
  border-radius: 50%;
  color: #007aff;
  font-size: 28px;
  font-weight: 850;
  animation: memory-ring-breathe 3.8s ease-in-out infinite;
}

.hero-detail-screen img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 9px;
  animation: detail-image-focus 5.4s ease-in-out infinite;
}

.hero-detail-section {
  display: grid;
  gap: 7px;
  margin-top: 13px;
}

.hero-detail-section h3 {
  display: flex;
  align-items: center;
  gap: 7px;
  margin: 0 0 7px;
  color: #111114;
  font-size: 16px;
  font-weight: 850;
}

.hero-detail-section h3 span {
  margin-right: auto;
}

.hero-detail-section h3 button {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border: 0;
  background: rgba(0, 122, 255, 0.12);
  border-radius: 50%;
  color: #007aff;
  font-size: 12px;
  animation: sound-pop 2.4s ease-in-out infinite;
}

.hero-symbol {
  display: inline-grid;
  place-items: center;
  width: 18px;
  height: 18px;
  color: #007aff;
  background: currentColor;
  -webkit-mask: var(--hero-icon) center / contain no-repeat;
  mask: var(--hero-icon) center / contain no-repeat;
}

.hero-symbol.quote {
  --hero-icon: url("data:image/svg+xml,%3Csvg viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath fill='black' d='M7 17h3l2-6V5H5v6h3zm10 0h3l2-6V5h-7v6h3z'/%3E%3C/svg%3E");
}

.hero-symbol.book {
  --hero-icon: url("data:image/svg+xml,%3Csvg viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath fill='black' d='M5 4.5A2.5 2.5 0 0 1 7.5 2H20v17H7.5A2.5 2.5 0 0 0 5 21.5zm0 0v17A2.5 2.5 0 0 0 7.5 24H20v-2H7.5a.5.5 0 0 1 0-1H20V4z'/%3E%3C/svg%3E");
}

.hero-symbol.spark {
  --hero-icon: url("data:image/svg+xml,%3Csvg viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath fill='black' d='m12 2 1.9 6.1L20 10l-6.1 1.9L12 18l-1.9-6.1L4 10l6.1-1.9zm7 12 .9 2.8 2.8.9-2.8.9L19 21l-.9-2.4-2.8-.9 2.8-.9zM5 13l.7 2.3L8 16l-2.3.7L5 19l-.7-2.3L2 16l2.3-.7z'/%3E%3C/svg%3E");
}

.hero-detail-screen p,
.hero-detail-screen small {
  color: #6b7280;
  font-size: 14px;
  line-height: 1.5;
}

.hero-detail-screen p {
  margin: 0;
  color: #111114;
  font-size: 15px;
}

.hero-detail-outline,
.hero-detail-compact {
  padding: 10px;
  background: transparent;
  border: 1px solid rgba(60, 60, 67, 0.16);
  border-radius: 8px;
}

.hero-detail-outline.accent-blue {
  border-color: rgba(0, 122, 255, 0.28);
}

.hero-detail-outline.accent-indigo {
  border-color: rgba(88, 86, 214, 0.30);
}

.hero-detail-outline small {
  display: block;
  margin-top: 4px;
}

.hero-detail-stack {
  display: grid;
  gap: 8px;
}

.hero-detail-compact {
  display: grid;
  gap: 3px;
}

.hero-detail-compact.accent-teal {
  border-color: rgba(48, 176, 199, 0.32);
}

.hero-detail-compact.accent-orange {
  border-color: rgba(255, 149, 0, 0.34);
}

.hero-detail-compact b {
  font-size: 12px;
  font-weight: 850;
}

.hero-detail-compact.accent-teal b {
  color: #30b0c7;
}

.hero-detail-compact.accent-orange b {
  color: #ff9500;
}

.hero-detail-compact p {
  font-size: 14px;
  line-height: 1.42;
}

.floating-card {
  position: absolute;
  z-index: 3;
  min-width: 142px;
  padding: 15px 16px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(0, 29, 255, 0.18);
  border-radius: 18px;
  box-shadow: 0 18px 50px rgba(7, 16, 37, 0.12);
  backdrop-filter: blur(16px);
  animation: drift 4.8s ease-in-out infinite;
}

.floating-card strong {
  display: block;
  margin-top: 2px;
  color: var(--blue);
  font-size: 28px;
  line-height: 1.04;
}

.floating-card span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  font-weight: 900;
}

.floating-card small {
  display: block;
  margin-top: 6px;
  color: rgba(101, 112, 134, 0.82);
  font-size: 12px;
  font-weight: 900;
}

.card-volume {
  right: -2%;
  bottom: 29%;
  max-width: 168px;
}

.card-memory {
  left: 0;
  top: 34%;
  max-width: 178px;
  animation-delay: 0.4s;
}

.card-widget {
  right: 0;
  bottom: 11%;
  max-width: 190px;
  animation-delay: 0.8s;
}

.proof-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding: 18px;
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: 0 18px 50px rgba(7, 16, 37, 0.06);
}

.proof-band div {
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(245, 248, 255, 0.9);
}

.proof-band span,
.screen-copy span,
.mock-panel > span,
.value-card span {
  display: block;
  color: var(--blue);
  font-size: 12px;
  font-weight: 950;
  text-transform: uppercase;
}

.proof-band strong {
  display: block;
  margin-top: 3px;
  font-size: 15px;
}

.value-section,
.experience-section,
.ai-section,
.science-section,
.motion-section,
.compare-section,
.screens-section,
.price-section,
.reviews-section,
.faq-section,
.download-section {
  padding: 96px 0;
}

.section-heading {
  max-width: 820px;
  margin-bottom: 34px;
}

.section-heading p:not(.eyebrow) {
  color: var(--muted);
  font-size: 18px;
  font-weight: 650;
}

.experience-layout {
  display: grid;
  grid-template-columns: minmax(320px, 430px) minmax(0, 1fr);
  gap: clamp(28px, 6vw, 82px);
  align-items: center;
}

.swift-phone-shell {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 740px;
}

.swift-phone-shell::before {
  content: "";
  position: absolute;
  inset: 8% 0;
  background: linear-gradient(135deg, rgba(0, 29, 255, 0.16), rgba(189, 252, 255, 0.28));
  border-radius: 48px;
  filter: blur(22px);
}

.swift-phone {
  position: relative;
  z-index: 1;
  width: min(380px, 100%);
  aspect-ratio: 390 / 740;
  padding: 12px;
  background: #0a0d14;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 48px;
  box-shadow: 0 34px 90px rgba(7, 16, 37, 0.24);
  animation: phone-enter 0.65s ease both;
}

.swift-status {
  display: flex;
  justify-content: space-between;
  padding: 8px 22px 7px;
  color: #f8fbff;
  font-size: 12px;
  font-weight: 800;
  line-height: 1;
}

.swift-app {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  height: calc(100% - 27px);
  background: #f2f2f7;
  border-radius: 36px;
  color: #111114;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
}

.swift-nav {
  position: relative;
  display: grid;
  grid-template-columns: 46px 1fr 46px;
  align-items: center;
  flex: 0 0 52px;
  height: 52px;
  padding: 0 8px;
  background: rgba(248, 248, 248, 0.86);
  border-bottom: 1px solid rgba(60, 60, 67, 0.12);
  backdrop-filter: blur(18px);
}

.swift-back {
  grid-column: 1;
}

.swift-back[hidden] {
  visibility: hidden;
  display: block;
}

.swift-nav strong {
  grid-column: 2;
  overflow: hidden;
  font-size: 17px;
  font-weight: 700;
  text-align: center;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.swift-icon-button {
  grid-column: 3;
}

.swift-nav button,
.ios-word-title,
.ios-detail-block button {
  border: 0;
  background: transparent;
  color: #007aff;
  cursor: pointer;
  font: inherit;
}

.swift-icon-button {
  font-size: 22px;
  font-weight: 800;
}

.swift-screen {
  flex: 1 1 auto;
  min-height: 0;
  overflow: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  contain: layout paint;
  touch-action: pan-y;
}

.swift-tabbar {
  flex: 0 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  align-items: start;
  padding: 7px 8px 10px;
  background: rgba(248, 248, 248, 0.94);
  border-top: 1px solid rgba(60, 60, 67, 0.16);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.swift-app[data-route="test"] .swift-tabbar,
.swift-app[data-route="detail"] .swift-tabbar {
  display: none;
}

.swift-tabbar span {
  display: grid;
  justify-items: center;
  gap: 3px;
  color: rgba(60, 60, 67, 0.32);
  font-size: 10px;
  font-weight: 600;
}

.swift-tabbar span .sf-icon {
  width: 26px;
  height: 26px;
  stroke-width: 2;
}

.swift-tabbar span.active {
  color: #007aff;
}

.swift-app[data-route="list"] .swift-screen,
.swift-app[data-route="test"] .swift-screen {
  overflow: hidden;
  overscroll-behavior: none;
}

.swift-app[data-route="test"] .swift-screen {
  touch-action: none;
}

.swift-screen > * {
  animation: ios-screen-in 0.24s ease both;
}

.sf-icon {
  width: 1.15em;
  height: 1.15em;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.9;
  stroke-linecap: round;
  stroke-linejoin: round;
  vertical-align: -0.17em;
}

.sf-icon .fill {
  fill: currentColor;
  stroke: currentColor;
}

.ios-list {
  min-height: 636px;
  padding: 14px;
}

.ios-list.grouped {
  background: #f2f2f7;
}

.ios-list.plain {
  padding: 0;
  background: #fff;
}

.ios-word-rows {
  overflow: hidden;
}

.swift-app[data-route="list"] .ios-list {
  min-height: 100%;
  height: 100%;
  overflow: hidden;
}

.ios-memory-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 10px;
}

.ios-overview {
  padding: 16px;
  background: #fff;
  border: 1px solid rgba(60, 60, 67, 0.13);
  border-radius: 18px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.04);
}

.ios-overview p {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 4px;
}

.ios-overview strong {
  font-size: 42px;
  font-weight: 800;
  line-height: 1;
}

.ios-overview span {
  color: #6b7280;
  font-size: 17px;
  font-weight: 700;
}

.ios-overview h4 {
  margin: 0;
  font-size: 17px;
}

.ios-overview.retained strong {
  color: #34c759;
}

.ios-overview.mastered strong {
  color: #007aff;
}

.ios-continue-card {
  display: grid;
  gap: 10px;
  margin-bottom: 10px;
  padding: 12px;
  background: #fff;
  border: 1px solid rgba(0, 122, 255, 0.16);
  border-radius: 8px;
}

.ios-continue-head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
}

.ios-continue-head > span {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: #007aff;
  background: rgba(0, 122, 255, 0.12);
  border-radius: 999px;
}

.ios-continue-head h4,
.ios-continue-head p {
  margin: 0;
}

.ios-continue-head h4 {
  font-size: 17px;
}

.ios-continue-head p {
  margin-top: 3px;
  color: #6b7280;
  font-size: 13px;
  font-weight: 700;
}

.ios-continue-head ul {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 12px;
  font-weight: 800;
}

.ios-continue-head li {
  display: flex;
  gap: 4px;
  align-items: center;
}

.ios-continue-head li.retained {
  color: #34c759;
}

.ios-continue-head li.mastered {
  color: #007aff;
}

.ios-continue-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.ios-continue-actions button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 36px;
  border: 0;
  border-radius: 8px;
  background: rgba(120, 120, 128, 0.10);
  color: #111114;
  font-size: 13px;
  font-weight: 800;
}

.ios-continue-actions button:last-child {
  background: rgba(0, 122, 255, 0.94);
  color: #fff;
}

.ios-level-bands {
  display: flex;
  gap: 8px;
  overflow: hidden;
  margin-bottom: 10px;
}

.ios-level-bands button {
  min-width: 62px;
  padding: 7px 13px;
  border: 1px solid rgba(0, 122, 255, 0.18);
  border-radius: 999px;
  background: rgba(0, 122, 255, 0.07);
  color: #007aff;
  font-size: 13px;
  font-weight: 800;
}

.ios-level-bands button.active {
  background: #007aff;
  color: #fff;
}

.ios-section-title {
  margin: 0 0 8px 2px;
  color: #6b7280;
  font-size: 13px;
  font-weight: 400;
}

.ios-sublevel-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  width: 100%;
  padding: 14px;
  border: 1px solid rgba(60, 60, 67, 0.24);
  border-radius: 8px;
  background: #fff;
  color: inherit;
  cursor: pointer;
  text-align: left;
}

.ios-sublevel-row p {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
  line-height: 1.3;
}

.ios-sublevel-row strong {
  font-size: 17px;
}

.ios-sublevel-row p span {
  color: #6b7280;
  font-size: 15px;
}

.ios-progress {
  overflow: hidden;
  width: 100%;
  height: 4px;
  background: rgba(120, 120, 128, 0.22);
  border-radius: 999px;
}

.ios-progress span {
  display: block;
  width: var(--value);
  height: 100%;
  background: #007aff;
  border-radius: inherit;
  transition: width 0.24s ease;
}

.ios-progress.segmented {
  position: relative;
}

.ios-progress.segmented span {
  width: calc(var(--retained) + var(--mastered));
  background: rgba(52, 199, 89, 0.72);
}

.ios-progress.segmented i {
  position: absolute;
  top: 0;
  left: var(--retained);
  display: block;
  width: var(--mastered);
  height: 100%;
  background: rgba(0, 122, 255, 0.88);
  border-radius: inherit;
}

.ios-sublevel-row ul {
  display: flex;
  gap: 12px;
  margin: 9px 0 0;
  padding: 0;
  color: #6b7280;
  font-size: 12px;
  list-style: none;
}

.ios-sublevel-row li,
.ios-test-header span,
.ios-detail-bottom button,
.ios-list-actions button {
  display: inline-flex;
  align-items: center;
}

.ios-sublevel-row em {
  align-self: center;
  color: #c7c7cc;
  font-size: 28px;
  font-style: normal;
}

.ios-list-actions {
  border-bottom: 8px solid #f2f2f7;
}

.ios-list-actions button {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-height: 48px;
  padding: 0 16px;
  border: 0;
  border-bottom: 1px solid rgba(60, 60, 67, 0.12);
  background: #fff;
  color: #007aff;
  cursor: pointer;
  font: inherit;
  font-size: 17px;
  text-align: left;
}

.ios-word-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 11px 16px;
  border-bottom: 1px solid rgba(60, 60, 67, 0.12);
  background: #fff;
}

.ios-memory-badge {
  position: relative;
  flex: 0 0 auto;
  overflow: hidden;
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border: 0;
  border-radius: 8px;
  background: rgba(142, 142, 147, 0.22);
  color: white;
  cursor: pointer;
  font: inherit;
  animation: badge-pop 0.28s ease both;
}

.ios-memory-badge span {
  position: absolute;
  inset: auto 0 0;
  height: var(--fill);
  background: #34c759;
  transition: height 0.24s ease;
}

.ios-memory-badge b {
  position: relative;
  z-index: 1;
  font-size: 20px;
  font-weight: 800;
  line-height: 1;
}

.ios-memory-badge.retained {
  background: rgba(52, 199, 89, 0.22);
}

.ios-memory-badge.mastered,
.ios-memory-badge.mastered span {
  background: #007aff;
}

.ios-memory-badge.circle {
  --ring-color: #8e8e93;
  width: 82px;
  height: 82px;
  border-radius: 50%;
  background:
    radial-gradient(circle at center, #fff 0 58%, transparent 59%),
    conic-gradient(var(--ring-color) calc(var(--percent) * 1%), rgba(60, 60, 67, 0.18) 0);
  color: #007aff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  transition: --percent 0.5s ease, background 0.28s ease, transform 0.28s ease;
}

.ios-memory-badge.circle.retained {
  --ring-color: #34c759;
}

.ios-memory-badge.circle.mastered {
  --ring-color: #007aff;
  background:
    radial-gradient(circle at center, #fff 0 58%, transparent 59%),
    conic-gradient(var(--ring-color) 100%, rgba(60, 60, 67, 0.18) 0);
}

.ios-memory-badge.circle span {
  display: none;
}

.ios-memory-badge.circle b {
  font-size: 31px;
}

.ios-word-main {
  display: grid;
  gap: 4px;
  min-width: 0;
  flex: 1;
  border: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
  font: inherit;
  text-align: left;
}

.ios-word-main span {
  display: flex;
  gap: 6px;
  align-items: center;
  line-height: 1.35;
}

.ios-word-main strong {
  font-size: 17px;
}

.ios-word-main i {
  color: #ff2d55;
  font-style: normal;
}

.ios-word-main small {
  color: #6b7280;
  font-size: 15px;
}

.ios-word-main em {
  justify-self: start;
  padding: 5px 10px;
  background: rgba(120, 120, 128, 0.12);
  border-radius: 999px;
  color: #6b7280;
  font-size: 12px;
  font-style: normal;
  font-weight: 700;
}

.ios-test-screen {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  gap: 14px;
  min-height: 100%;
  height: 100%;
  padding: 16px;
  background: #fff;
  overflow: hidden;
}

.ios-test-header p {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
  color: #6b7280;
  font-size: 12px;
  line-height: 1.35;
}

.ios-test-header span {
  gap: 4px;
}

.ios-test-header strong {
  font-size: 17px;
}

.ios-segmented {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  margin-top: 10px;
  padding: 2px;
  background: rgba(120, 120, 128, 0.2);
  border-radius: 8px;
}

.ios-segmented button {
  min-height: 28px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: #111114;
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  font-weight: 700;
}

.ios-segmented button.active {
  background: #fff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.14);
}

.ios-segmented.icons {
  grid-template-columns: repeat(4, 1fr);
}

.ios-test-card {
  position: relative;
  min-height: 0;
  height: 100%;
  padding: 20px;
  background: #f2f2f7;
  border: 1px solid rgba(60, 60, 67, 0.12);
  border-radius: 8px;
  cursor: grab;
  box-shadow: none;
  transform-origin: center;
  will-change: transform;
  transition: transform 0.2s ease;
  overflow: visible;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
  contain: layout paint;
}

.ios-test-card.is-dragging {
  transition: none;
  cursor: grabbing;
}

.ios-test-card.answered-known {
  animation: answer-known 0.22s ease-in forwards;
}

.ios-test-card.answered-learning {
  animation: answer-learning 0.22s ease-in forwards;
}

.ios-test-card.answered-mastered {
  animation: answer-mastered 0.22s ease-in forwards;
}

.ios-card-face {
  position: absolute;
  inset: 20px;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 14px;
  backface-visibility: hidden;
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.ios-card-face.front strong {
  font-size: 40px;
  line-height: 1;
}

.ios-card-face.front span {
  color: #6b7280;
  font-size: 21px;
}

.ios-card-face.front button,
.ios-card-back-head button,
.ios-complete button {
  border: 1px solid rgba(60, 60, 67, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.96);
  color: #007aff;
  cursor: pointer;
  font: inherit;
  font-weight: 800;
}

.ios-card-face.front button {
  padding: 7px 13px;
  box-shadow: none;
}

.ios-round-icon {
  position: relative;
  display: grid;
  place-items: center;
  width: 44px;
  height: 40px;
  border: 0 !important;
  background: rgba(120, 120, 128, 0.12) !important;
  border-radius: 999px !important;
  color: rgba(60, 60, 67, 0.58) !important;
  box-shadow: none !important;
}

.ios-round-icon .sf-icon {
  width: 22px;
  height: 22px;
  stroke-width: 2.15;
}

.ios-card-face.front .ios-round-icon {
  width: 54px;
  height: 54px;
  background: rgba(0, 122, 255, 0.12) !important;
  color: #007aff !important;
}

.ios-round-icon.is-playing,
.ios-detail-block button.is-playing,
.ios-detail-section button.is-playing,
.ios-word-title.is-playing span {
  color: #007aff !important;
  animation: sound-pop 0.5s ease, sound-ring 1.1s ease-out;
}

.ios-card-face.front small {
  align-self: end;
  color: #6b7280;
  font-size: 12px;
}

.ios-card-face.back {
  align-content: start;
  justify-items: stretch;
  grid-template-rows: auto auto auto minmax(0, 1fr);
  opacity: 0;
  transform: rotateY(180deg);
}

.ios-test-card.back-visible .front {
  opacity: 0;
  transform: rotateY(-180deg);
}

.ios-test-card.back-visible .back {
  opacity: 1;
  transform: rotateY(0);
}

.ios-card-back-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.ios-card-back-head strong {
  font-size: 21px;
}

.ios-card-back-head button {
  position: relative;
  display: grid;
  place-items: center;
  width: 74px;
  height: 50px;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: #ff2d55;
  font-size: 24px;
  box-shadow: none;
}

.ios-heart-button .sf-icon {
  width: 24px;
  height: 24px;
  stroke-width: 2.2;
  transition: transform 0.18s ease, opacity 0.18s ease;
}

.ios-heart-button .fill {
  fill: currentColor;
}

.ios-heart-button.is-favorited .sf-icon {
  transform: scale(1.16);
}

.ios-heart-button.is-favorited::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 56px;
  height: 56px;
  margin: -28px 0 0 -28px;
  background:
    radial-gradient(circle at 50% 50%, #ff2d55 0 18%, transparent 20%),
    radial-gradient(circle at 20% 16%, #ff2d55 0 6%, transparent 7%),
    radial-gradient(circle at 78% 18%, #ff453a 0 6%, transparent 7%),
    radial-gradient(circle at 32% 0%, #fff 0 5%, transparent 6%),
    radial-gradient(circle at 70% 0%, #ff2d55 0 5%, transparent 6%),
    radial-gradient(circle at 12% 54%, #ff2d55 0 5%, transparent 6%),
    radial-gradient(circle at 88% 54%, #fff 0 5%, transparent 6%);
  pointer-events: none;
  animation: favorite-burst 0.42s ease-out both;
}

.ios-image-placeholder,
.ios-detail-image {
  display: block;
  width: 100%;
  min-height: 128px;
  height: 140px;
  border-radius: 8px;
  object-fit: cover;
  background: #f2f2f7;
}

.ios-card-meaning {
  display: grid;
  align-content: center;
  min-height: 100px;
  text-align: center;
}

.ios-card-tab-content {
  min-height: 0;
  height: 100%;
  padding: 0 2px 0 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  touch-action: pan-y;
  animation: ios-screen-in 0.16s ease both;
}

.ios-card-example {
  display: grid;
  justify-items: center;
  gap: 8px;
  min-height: 98px;
  text-align: center;
}

.ios-card-example p,
.ios-card-example small {
  margin: 0;
}

.ios-card-example small {
  color: #6b7280;
}

.ios-card-detail-list {
  display: grid;
  gap: 10px;
  min-height: 118px;
}

.ios-card-detail-list p {
  display: grid;
  gap: 4px;
  margin: 0;
  text-align: left;
}

.ios-card-detail-list b {
  color: #6b7280;
  font-size: 14px;
}

.ios-card-detail-list span {
  font-size: 15px;
  line-height: 1.55;
}

.ios-card-meaning h4 {
  margin: 0 0 8px;
  font-size: 22px;
}

.ios-card-meaning p {
  margin: 0;
  color: #6b7280;
  font-size: 14px;
  line-height: 1.5;
}

.ios-swipe-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 8px;
  pointer-events: none;
  color: transparent;
  font-size: 34px;
  font-weight: 800;
}

.ios-swipe-overlay-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  transform: rotate(var(--label-rotation, 0deg));
}

.ios-swipe-overlay .sf-icon {
  width: 52px;
  height: 52px;
  stroke-width: 2.2;
}

.ios-swipe-overlay.learning,
.ios-swipe-overlay.retained,
.ios-swipe-overlay.mastered {
  border: 5px solid currentColor;
}

.ios-swipe-overlay.learning {
  color: #8e8e93;
  background: rgba(142, 142, 147, 0.16);
}

.ios-swipe-overlay.retained {
  color: #34c759;
  background: rgba(52, 199, 89, 0.12);
  --label-rotation: -12deg;
}

.ios-swipe-overlay.learning {
  --label-rotation: 12deg;
}

.ios-swipe-overlay.mastered {
  color: #007aff;
  background: rgba(0, 122, 255, 0.12);
}

.ios-swipe-tutorial {
  position: absolute;
  left: 50%;
  bottom: 64px;
  z-index: 4;
  display: grid;
  justify-items: center;
  gap: 12px;
  width: 190px;
  margin-left: -95px;
  pointer-events: none;
}

.ios-swipe-tutorial span {
  padding: 8px 12px;
  background: rgba(7, 16, 37, 0.86);
  border-radius: 999px;
  color: white;
  font-size: 12px;
  font-weight: 900;
  animation: tutorial-chip 2.7s ease-in-out infinite;
}

.ios-swipe-tutorial i {
  position: relative;
  width: 92px;
  height: 8px;
  background: rgba(52, 199, 89, 0.22);
  border-radius: 999px;
}

.ios-swipe-tutorial i::before {
  content: "";
  position: absolute;
  left: 36px;
  top: 50%;
  width: 36px;
  height: 36px;
  margin-top: -18px;
  background: rgba(52, 199, 89, 0.96);
  border-radius: 50%;
  box-shadow: 0 10px 24px rgba(52, 199, 89, 0.26);
  animation: tutorial-swipe 2.7s ease-in-out infinite;
}

.ios-swipe-tutorial i::after {
  content: "→";
  position: absolute;
  right: -18px;
  top: -14px;
  color: #34c759;
  font-size: 28px;
  font-weight: 950;
}

.ios-test-coach {
  position: absolute;
  inset: 18px;
  z-index: 4;
  pointer-events: none;
}

.ios-test-card.back-visible .ios-test-coach {
  display: none;
}

.ios-test-coach strong {
  position: absolute;
  left: 50%;
  top: 36px;
  z-index: 2;
  width: min(260px, 82%);
  padding: 10px 12px;
  border: 1px solid rgba(0, 29, 255, 0.1);
  background: rgba(255, 255, 255, 0.94);
  border-radius: 16px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 950;
  text-align: center;
  box-shadow: 0 16px 34px rgba(7, 16, 37, 0.14);
  opacity: 0;
  transform: translateX(-50%);
  animation: coach-title 8s ease-in-out infinite;
}

.ios-test-coach span {
  position: absolute;
  padding: 9px 12px;
  background: rgba(7, 16, 37, 0.86);
  border-radius: 999px;
  color: white;
  font-size: 12.5px;
  font-weight: 900;
  white-space: nowrap;
  opacity: 0;
  animation: coach-tap-chip 8s ease-in-out infinite;
  box-shadow: 0 12px 26px rgba(7, 16, 37, 0.18);
}

.ios-test-coach .tap {
  left: 50%;
  bottom: 26px;
  transform-origin: center;
  translate: -50% 0;
}

.ios-test-coach .right {
  right: -2px;
  top: 50%;
  background: rgba(52, 199, 89, 0.92);
  animation-name: coach-right-chip;
}

.ios-test-coach .up {
  left: 50%;
  top: 0;
  translate: -50% 0;
  background: rgba(0, 122, 255, 0.92);
  animation-name: coach-up-chip;
}

.ios-test-coach .left {
  left: -2px;
  top: 50%;
  background: rgba(142, 142, 147, 0.95);
  animation-name: coach-left-chip;
}

.ios-test-coach i {
  --x: 0px;
  --y: 0px;
  position: absolute;
  left: 50%;
  top: 50%;
  width: 38px;
  height: 38px;
  margin: -19px 0 0 -19px;
  border-radius: 50%;
  background: rgba(7, 16, 37, 0.84);
  box-shadow: 0 10px 28px rgba(7, 16, 37, 0.22);
  opacity: 0;
  animation: coach-dot 8s ease-in-out infinite;
}

.ios-test-coach i::before,
.ios-test-coach i::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  background: inherit;
}

.ios-test-coach i::before {
  right: -8px;
  bottom: -10px;
  width: 15px;
  height: 28px;
  transform: rotate(-34deg);
}

.ios-test-coach i::after {
  inset: -9px;
  background: transparent;
  border: 2px solid rgba(7, 16, 37, 0.22);
}

.ios-test-actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.ios-test-actions button {
  display: grid;
  place-items: center;
  min-height: 64px;
  padding: 8px 6px;
  border: 0;
  border-radius: 18px;
  color: #fff;
  cursor: pointer;
  font: inherit;
  line-height: 1.15;
  box-shadow: 0 5px 10px rgba(0, 0, 0, 0.14);
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.ios-test-actions b {
  display: grid;
  place-items: center;
  font-size: 22px;
}

.ios-test-actions b .sf-icon {
  width: 23px;
  height: 23px;
  stroke-width: 2.4;
}

.ios-test-actions span {
  font-size: 12px;
  font-weight: 800;
  line-height: 1.15;
  white-space: nowrap;
  min-width: 0;
  max-width: 100%;
}

.ios-test-actions small {
  opacity: 0.85;
  font-size: 10px;
  font-weight: 700;
}

.ios-test-actions .learning {
  background: #8e8e93;
}

.ios-test-actions .mastered {
  background: #007aff;
}

.ios-test-actions .retained {
  background: #34c759;
}

.ios-complete {
  display: grid;
  align-content: center;
  justify-items: center;
  min-height: 560px;
  gap: 12px;
  text-align: center;
}

.ios-complete > div:not(.ios-complete-actions) {
  display: grid;
  place-items: center;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: #34c759;
  color: #fff;
  font-size: 42px;
}

.ios-complete h3 {
  margin: 0;
  font-size: 36px;
}

.ios-complete p {
  color: #6b7280;
}

.ios-complete button {
  padding: 9px 16px;
  background: #007aff;
  color: #fff;
}

.ios-complete-actions {
  display: grid;
  gap: 9px;
  width: min(230px, 100%);
}

.ios-complete-actions button:nth-child(2) {
  background: #34c759;
}

.ios-complete-actions button:nth-child(3) {
  background: #fff;
  color: #007aff;
}

.ios-detail {
  min-height: 636px;
  padding: 16px 16px 70px;
  background: #fff;
}

.ios-detail-header {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 12px;
  margin-bottom: 22px;
}

.ios-word-title {
  padding: 0;
  color: #111114;
  font-size: 38px;
  font-weight: 800;
  line-height: 1.1;
}

.ios-word-title span {
  display: inline-grid;
  place-items: center;
  margin-left: 8px;
  width: 32px;
  height: 32px;
  background: rgba(120, 120, 128, 0.12);
  border-radius: 50%;
  color: rgba(60, 60, 67, 0.55);
  font-size: 18px;
}

.ios-word-title .sf-icon {
  width: 22px;
  height: 22px;
}

.ios-detail-header p {
  margin: 5px 0 4px;
  color: #6b7280;
  font-size: 21px;
}

.ios-detail-header h3 {
  margin: 0 0 8px;
  font-size: 21px;
}

.ios-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.ios-chips span {
  padding: 5px 9px;
  background: rgba(120, 120, 128, 0.12);
  border-radius: 999px;
  color: #6b7280;
  font-size: 12px;
  font-weight: 700;
}

.ios-detail-image {
  min-height: 248px;
  height: auto;
  aspect-ratio: 4 / 3;
  margin-bottom: 22px;
}

.ios-detail-block {
  margin-bottom: 22px;
}

.ios-detail-block[class*="accent-"] {
  padding: 12px;
  background: transparent;
  border: 1px solid rgba(120, 120, 128, 0.18);
  border-radius: 8px;
}

.ios-detail-block.accent-blue {
  border-color: rgba(0, 122, 255, 0.28);
  background: transparent;
}

.ios-detail-block.accent-indigo {
  border-color: rgba(88, 86, 214, 0.28);
  background: transparent;
}

.ios-detail-block.accent-teal {
  border-color: rgba(48, 176, 199, 0.30);
  background: transparent;
}

.ios-detail-block.accent-purple {
  border-color: rgba(175, 82, 222, 0.28);
  background: transparent;
}

.ios-detail-block h4 {
  display: flex;
  align-items: center;
  gap: 6px;
  justify-content: space-between;
  margin: 0 0 8px;
  font-size: 17px;
}

.ios-detail-block h4 > .sf-icon {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  color: #007aff;
}

.ios-detail-block h4 button {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  background: rgba(120, 120, 128, 0.12);
  border-radius: 50%;
  color: rgba(60, 60, 67, 0.62);
}

.ios-detail-favorite {
  align-self: start;
  display: grid !important;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 0 !important;
  background: transparent !important;
  color: #ff2d55 !important;
  cursor: pointer;
  font: inherit;
}

.ios-detail-block p,
.ios-detail-block small {
  margin: 0;
  color: #111114;
  font-size: 17px;
  line-height: 1.5;
}

.ios-detail-block small {
  display: block;
  margin-top: 6px;
  color: #6b7280;
}

.ios-detail-block div {
  display: grid;
  gap: 4px;
  margin-top: 10px;
  padding: 12px;
  background: transparent;
  border: 1px solid rgba(60, 60, 67, 0.10);
  border-radius: 8px;
}

.ios-detail-block b {
  color: #6b7280;
  font-size: 15px;
}

.ios-detail-section {
  display: grid;
  gap: 10px;
  margin-bottom: 22px;
}

.ios-detail-section h4 {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  color: #111114;
  font-size: 17px;
}

.ios-detail-section h4 > .sf-icon {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  color: #007aff;
}

.ios-detail-section h4 span {
  margin-right: auto;
}

.ios-detail-section h4 button {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 0;
  background: rgba(0, 122, 255, 0.12);
  border-radius: 50%;
  color: #007aff;
}

.ios-detail-outline,
.ios-detail-compact,
.ios-test-detail-block {
  padding: 12px;
  background: transparent;
  border: 1px solid rgba(60, 60, 67, 0.16);
  border-radius: 8px;
}

.ios-detail-outline p,
.ios-detail-outline small,
.ios-detail-compact p,
.ios-test-detail-block p {
  margin: 0;
  color: #111114;
  font-size: 17px;
  line-height: 1.5;
}

.ios-detail-outline small {
  display: block;
  margin-top: 6px;
  color: #6b7280;
}

.ios-detail-stack {
  display: grid;
  gap: 10px;
}

.ios-detail-compact h5,
.ios-test-detail-block h5 {
  display: flex;
  align-items: center;
  gap: 7px;
  margin: 0 0 8px;
  color: #111114;
  font-size: 17px;
}

.ios-detail-compact h5 .sf-icon,
.ios-test-detail-block h5 .sf-icon {
  width: 17px;
  height: 17px;
}

.ios-detail-outline.accent-blue,
.ios-detail-compact.accent-blue,
.ios-test-detail-block.accent-blue {
  border-color: rgba(0, 122, 255, 0.28);
}

.ios-detail-outline.accent-indigo,
.ios-detail-compact.accent-indigo,
.ios-test-detail-block.accent-indigo {
  border-color: rgba(88, 86, 214, 0.30);
}

.ios-detail-compact.accent-teal,
.ios-test-detail-block.accent-teal {
  border-color: rgba(48, 176, 199, 0.32);
}

.ios-detail-compact.accent-orange,
.ios-test-detail-block.accent-orange {
  border-color: rgba(255, 149, 0, 0.34);
}

.ios-detail-compact.accent-pink,
.ios-test-detail-block.accent-pink {
  border-color: rgba(255, 45, 85, 0.30);
}

.ios-detail-compact.accent-purple,
.ios-test-detail-block.accent-purple {
  border-color: rgba(175, 82, 222, 0.30);
}

.ios-detail-compact.accent-teal h5,
.ios-test-detail-block.accent-teal h5 {
  color: #30b0c7;
}

.ios-detail-compact.accent-orange h5,
.ios-test-detail-block.accent-orange h5 {
  color: #ff9500;
}

.ios-detail-compact.accent-pink h5,
.ios-test-detail-block.accent-pink h5 {
  color: #ff2d55;
}

.ios-detail-compact.accent-indigo h5,
.ios-test-detail-block.accent-indigo h5 {
  color: #5856d6;
}

.ios-detail-compact.accent-purple h5,
.ios-test-detail-block.accent-purple h5 {
  color: #af52de;
}

.ios-detail-bottom {
  position: sticky;
  bottom: -70px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 12px;
  margin: 24px -16px -70px;
  padding: 12px 16px;
  background: rgba(248, 248, 248, 0.88);
  border-top: 1px solid rgba(60, 60, 67, 0.12);
  backdrop-filter: blur(16px);
}

.ios-detail-bottom button {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  border: 0;
  background: transparent;
  color: #007aff;
  cursor: pointer;
  font: inherit;
}

.ios-detail-bottom button:last-child {
  text-align: right;
}

.ios-detail-bottom button:disabled {
  color: rgba(60, 60, 67, 0.32);
  cursor: default;
}

.ios-detail-bottom span {
  color: #6b7280;
  font-size: 12px;
}

.is-playing {
  animation: sound-pop 0.5s ease;
}

.experience-copy {
  max-width: 620px;
}

.experience-copy > span {
  display: block;
  margin-bottom: 12px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 950;
  text-transform: uppercase;
}

.experience-copy h3 {
  max-width: 12em;
  font-size: clamp(36px, 5vw, 58px);
  line-height: 1.1;
}

.experience-copy p {
  color: #35415c;
  font-size: 19px;
  font-weight: 700;
}

.touch-flow {
  display: grid;
  gap: 9px;
  margin: 22px 0 24px;
}

.touch-flow span {
  position: relative;
  display: block;
  padding: 13px 14px 13px 44px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(0, 29, 255, 0.1);
  border-radius: 16px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 900;
  box-shadow: 0 12px 28px rgba(7, 16, 37, 0.05);
  animation: touch-step-rise 4.8s ease-in-out infinite;
}

.touch-flow span:nth-child(2) {
  animation-delay: 0.3s;
}

.touch-flow span:nth-child(3) {
  animation-delay: 0.6s;
}

.touch-flow span::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 50%;
  width: 16px;
  height: 16px;
  margin-top: -8px;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  border-radius: 50%;
  box-shadow: 0 0 0 5px rgba(0, 29, 255, 0.08);
}

.experience-copy ul {
  display: grid;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.experience-copy li {
  padding: 13px 15px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--line);
  border-radius: 12px;
  color: #35415c;
  font-weight: 800;
}

.experience-copy .primary-button {
  margin-top: 4px;
}

.gesture-guide {
  display: grid;
  grid-template-columns: minmax(170px, 0.42fr) minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  max-width: 760px;
  margin-top: 24px;
  padding: 18px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(0, 29, 255, 0.12);
  border-radius: 24px;
  box-shadow: 0 18px 52px rgba(7, 16, 37, 0.06);
}

.gesture-phone {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 160px;
  background: linear-gradient(180deg, #f9fbff, #eef5ff);
  border: 1px solid rgba(0, 29, 255, 0.1);
  border-radius: 22px;
  overflow: hidden;
  transform: translateZ(0);
}

.gesture-card {
  display: grid;
  place-items: center;
  width: 116px;
  height: 96px;
  background: white;
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 18px 38px rgba(7, 16, 37, 0.12);
  color: var(--blue);
  font-size: 23px;
  font-weight: 950;
  animation: gesture-swipe 3.2s ease-in-out infinite;
}

.gesture-hand {
  position: absolute;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgba(7, 16, 37, 0.86);
  box-shadow: 0 10px 24px rgba(7, 16, 37, 0.22);
  animation: gesture-hand 3.2s ease-in-out infinite;
}

.gesture-hand::after {
  content: "";
  position: absolute;
  right: -7px;
  bottom: -10px;
  width: 15px;
  height: 26px;
  background: rgba(7, 16, 37, 0.86);
  border-radius: 999px;
  transform: rotate(-32deg);
}

.gesture-guide ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.gesture-guide li {
  display: grid;
  gap: 3px;
  padding: 12px;
  background: rgba(0, 29, 255, 0.055);
  border-radius: 16px;
}

.gesture-guide b,
.gesture-guide span {
  display: block;
}

.gesture-guide b {
  color: var(--blue);
  font-size: 14px;
}

.gesture-guide span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  line-height: 1.45;
}

.ai-section {
  padding: 96px 0;
}

.ai-proof-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin: -10px 0 18px;
}

.ai-proof-strip p {
  margin: 0;
  padding: 16px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(0, 29, 255, 0.1);
  border-radius: 18px;
  box-shadow: 0 14px 34px rgba(7, 16, 37, 0.05);
  animation: ai-card-rise 3.8s ease-in-out infinite;
}

.ai-proof-strip p:nth-child(2) {
  animation-delay: 0.12s;
}

.ai-proof-strip p:nth-child(3) {
  animation-delay: 0.24s;
}

.ai-proof-strip p:nth-child(4) {
  animation-delay: 0.36s;
}

.ai-proof-strip b,
.ai-proof-strip span {
  display: block;
}

.ai-proof-strip b {
  color: var(--blue);
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1;
}

.ai-proof-strip span {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 900;
}

.ai-showcase {
  display: grid;
  grid-template-columns: minmax(190px, 0.36fr) minmax(0, 0.32fr) minmax(280px, 0.46fr);
  gap: 18px;
  align-items: stretch;
  margin-bottom: 18px;
  padding: 22px;
  background:
    radial-gradient(circle at 18% 18%, rgba(189, 252, 255, 0.4), transparent 30%),
    linear-gradient(135deg, #071025, #001dff);
  border-radius: 30px;
  color: white;
  overflow: hidden;
}

.ai-engine {
  position: relative;
  display: grid;
  place-items: center;
  align-content: center;
  min-height: 220px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 24px;
}

.ai-engine span {
  display: grid;
  place-items: center;
  width: 92px;
  height: 92px;
  background: white;
  border-radius: 28px;
  color: var(--blue);
  font-size: 42px;
  font-weight: 950;
  animation: ai-core-pulse 2.8s ease-in-out infinite;
}

.ai-engine b {
  margin-top: 14px;
  color: rgba(255, 255, 255, 0.74);
  font-size: 13px;
}

.ai-engine i {
  position: absolute;
  inset: 20px;
  border: 1px solid rgba(189, 252, 255, 0.24);
  border-radius: 20px;
}

.ai-pipeline {
  display: grid;
  align-content: center;
  gap: 12px;
}

.ai-pipeline span {
  display: grid;
  gap: 2px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  color: white;
  font-weight: 950;
  animation: ai-flow 3.4s ease-in-out infinite;
}

.ai-pipeline b {
  font-size: 14px;
  line-height: 1.15;
}

.ai-pipeline small {
  color: rgba(255, 255, 255, 0.72);
  font-size: 11px;
  font-weight: 850;
  line-height: 1.25;
}

.ai-pipeline span:nth-child(2) {
  animation-delay: 0.18s;
}

.ai-pipeline span:nth-child(3) {
  animation-delay: 0.36s;
}

.ai-pipeline span:nth-child(4) {
  animation-delay: 0.54s;
}

.ai-output-card {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  padding: 16px;
  background: rgba(255, 255, 255, 0.94);
  border-radius: 24px;
  color: var(--ink);
  animation: ai-card-rise 3.4s ease-in-out infinite;
}

.ai-output-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 18px;
}

.ai-output-card small {
  color: var(--blue);
  font-size: 13px;
  font-weight: 950;
}

.ai-output-card strong {
  display: block;
  margin: 8px 0;
  font-size: clamp(28px, 3vw, 42px);
  line-height: 1.02;
}

.ai-output-card p {
  margin: 0;
  color: var(--muted);
  font-weight: 800;
}

.ai-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.ai-grid article {
  padding: 26px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(247, 250, 255, 0.9));
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: 0 18px 52px rgba(7, 16, 37, 0.06);
  overflow: hidden;
}

.ai-grid span {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 18px;
  background: rgba(0, 29, 255, 0.1);
  border-radius: 50%;
  color: var(--blue);
  font-size: 13px;
  font-weight: 950;
}

.ai-grid p {
  color: var(--muted);
  font-weight: 650;
}

.ai-card-visual {
  position: relative;
  min-height: 138px;
  margin: 18px 0;
  padding: 16px;
  overflow: hidden;
  border: 1px solid rgba(0, 29, 255, 0.08);
  border-radius: 18px;
  background: linear-gradient(145deg, rgba(0, 29, 255, 0.07), rgba(189, 252, 255, 0.18));
}

.ai-talk-visual i {
  display: inline-grid;
  width: auto;
  height: auto;
  margin: 0 0 12px;
  padding: 7px 10px;
  background: #001dff;
  border-radius: 999px;
  color: white;
  font-style: normal;
  font-size: 11px;
  font-weight: 950;
  place-items: center;
}

.ai-talk-visual p {
  width: fit-content;
  max-width: 100%;
  margin: 0 0 8px;
  padding: 8px 10px;
  background: white;
  border-radius: 12px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 850;
  box-shadow: 0 10px 24px rgba(7, 16, 37, 0.08);
  animation: ai-talk-cycle 4.8s ease-in-out infinite;
}

.ai-talk-visual p:nth-of-type(2) {
  margin-left: auto;
  animation-delay: 0.55s;
}

.ai-talk-visual p:nth-of-type(3) {
  animation-delay: 1.1s;
}

.ai-image-visual {
  display: grid;
  align-content: end;
  justify-items: start;
  gap: 8px;
  min-height: 150px;
  padding: 14px;
  background:
    linear-gradient(180deg, rgba(7, 16, 37, 0.02), rgba(7, 16, 37, 0.62)),
    url("./assets/blow.webp") center / cover;
  background-size: 100% 100%, 112% auto;
  animation: ai-image-zoom 7s ease-in-out infinite;
}

.ai-image-visual::after {
  display: none;
}

.ai-image-visual b,
.ai-image-visual span,
.ai-image-visual small {
  position: relative;
  z-index: 1;
  padding: 7px 10px;
  background: rgba(255, 255, 255, 0.94);
  border-radius: 999px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 950;
  box-shadow: 0 14px 30px rgba(7, 16, 37, 0.14);
}

.ai-image-visual em {
  display: none;
}

.ai-image-visual span {
  color: var(--ink);
}

.ai-image-visual small {
  position: absolute;
  right: 14px;
  bottom: 14px;
  color: white;
  background: rgba(0, 29, 255, 0.88);
}

.ai-knowledge-visual {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: center;
  gap: 10px;
}

.ai-knowledge-visual b {
  grid-column: 1 / -1;
  padding: 14px;
  background: #071025;
  border-radius: 16px;
  color: white;
  font-size: 24px;
  font-weight: 950;
  text-align: center;
}

.ai-knowledge-visual i {
  display: grid;
  width: auto;
  height: 38px;
  margin: 0;
  background: white;
  border-radius: 999px;
  color: var(--blue);
  font-style: normal;
  font-size: 13px;
  font-weight: 950;
  place-items: center;
  box-shadow: 0 10px 24px rgba(7, 16, 37, 0.08);
  animation: ai-knowledge-pop 4.6s ease-in-out infinite;
}

.ai-knowledge-visual i:nth-of-type(2) {
  animation-delay: 0.35s;
}

.ai-knowledge-visual i:nth-of-type(3) {
  animation-delay: 0.7s;
}

.ai-knowledge-visual i:nth-of-type(4) {
  animation-delay: 1.05s;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}

.science-grid,
.review-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.science-grid article,
.review-grid article {
  padding: 24px;
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: 0 18px 48px rgba(7, 16, 37, 0.06);
}

.science-card {
  display: grid;
  align-content: start;
}

.science-grid span {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 16px;
  background: rgba(0, 29, 255, 0.1);
  border-radius: 50%;
  color: var(--blue);
  font-size: 13px;
  font-weight: 950;
}

.science-grid h3 {
  font-size: 22px;
}

.science-visual {
  position: relative;
  display: grid;
  place-items: center;
  height: 168px;
  margin: 6px 0 18px;
  overflow: hidden;
  background: linear-gradient(180deg, #f9fbff, #eef5ff);
  border: 1px solid rgba(0, 29, 255, 0.1);
  border-radius: 18px;
  transform: translateZ(0);
}

.recall-visual {
  perspective: 780px;
}

.recall-card-face {
  position: relative;
  display: grid;
  place-items: center;
  width: 132px;
  height: 104px;
  background: white;
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 16px 34px rgba(7, 16, 37, 0.1);
  transform-style: preserve-3d;
  animation: recall-flip 4.6s ease-in-out infinite;
}

.science-grid .recall-card-back {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-rows: 1fr auto;
  place-items: center;
  width: 100%;
  height: 100%;
  margin: 0;
  background: white;
  border-radius: 14px;
  color: var(--blue);
  overflow: hidden;
  transform: rotateY(180deg);
  backface-visibility: hidden;
}

.recall-card-back img {
  width: 100%;
  height: 74px;
  object-fit: cover;
  object-position: center;
}

.recall-card-back em {
  display: grid;
  place-items: center;
  width: 100%;
  min-height: 30px;
  color: var(--blue);
  font-size: 18px;
  font-style: normal;
  font-weight: 950;
}

.recall-card-face b,
.recall-card-face small {
  backface-visibility: hidden;
}

.recall-card-face b {
  font-size: 28px;
  line-height: 1;
}

.recall-card-face small {
  color: var(--muted);
  font-size: 28px;
  font-weight: 950;
}

.recall-visual > i {
  position: absolute;
  right: 18px;
  bottom: 16px;
  padding: 5px 10px;
  border: 2px solid var(--green);
  border-radius: 999px;
  color: var(--green);
  font-style: normal;
  font-size: 12px;
  font-weight: 950;
  animation: recall-label 4.6s ease-in-out infinite;
}

.spaced-visual svg {
  width: 88%;
  height: auto;
}

.spaced-axis {
  fill: none;
  stroke: rgba(7, 16, 37, 0.16);
  stroke-width: 3;
  stroke-linecap: round;
}

.spaced-curve {
  fill: none;
  stroke: var(--blue);
  stroke-width: 7;
  stroke-linecap: round;
  stroke-dasharray: 320;
  animation: science-curve 3.2s ease-in-out infinite;
}

.spaced-dot {
  transform-box: fill-box;
  transform-origin: center;
  animation: dot-pulse 1.5s ease-in-out infinite;
}

.spaced-dot.first {
  fill: #ff3b7f;
}

.spaced-dot.second {
  fill: var(--green);
  animation-delay: 0.48s;
}

.spaced-visual b {
  position: absolute;
  left: 50%;
  bottom: 16px;
  padding: 5px 11px;
  background: var(--blue);
  border-radius: 999px;
  color: white;
  font-size: 12px;
  animation: review-chip 3.2s ease-in-out infinite;
}

.multisense-visual {
  overflow: visible;
}

.multisense-visual b {
  display: grid;
  place-items: center;
  width: 72px;
  height: 72px;
  background: white;
  border: 1px solid rgba(0, 29, 255, 0.14);
  border-radius: 50%;
  color: var(--blue);
  font-size: 18px;
  box-shadow: 0 16px 34px rgba(0, 29, 255, 0.08);
}

.multisense-visual i {
  position: absolute;
  width: 34px;
  height: 34px;
  border-radius: 12px;
  background: var(--blue);
  animation: orbit-sense 5.2s linear infinite;
}

.sense-image {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.76), transparent),
    var(--blue) !important;
}

.sense-sound {
  background: var(--green) !important;
  animation-delay: -1.7s !important;
}

.sense-example {
  background: #ff3b7f !important;
  animation-delay: -3.4s !important;
}

.sense-image::before,
.sense-sound::before,
.sense-example::before {
  content: "";
  position: absolute;
  inset: 9px;
  border: 2px solid white;
  border-radius: 7px;
}

.sense-sound::before {
  border-radius: 50%;
}

.sense-example::before {
  height: 2px;
  top: 11px;
  border-width: 0;
  background: white;
  box-shadow: 0 7px 0 white, 0 14px 0 white;
}

.feedback-visual {
  align-content: center;
  gap: 12px;
}

.feedback-badge {
  --percent: 34;
  display: grid;
  place-items: center;
  width: 78px;
  height: 78px;
  background:
    radial-gradient(circle at center, white 0 58%, transparent 59%),
    conic-gradient(var(--green) calc(var(--percent) * 1%), rgba(60, 60, 67, 0.16) 0);
  border-radius: 50%;
  color: var(--green);
  animation: feedback-ring 3.4s ease-in-out infinite;
}

.feedback-badge b {
  font-size: 28px;
  line-height: 1;
}

.feedback-meter {
  overflow: hidden;
  width: min(150px, 78%);
  height: 9px;
  background: rgba(60, 60, 67, 0.14);
  border-radius: 999px;
}

.feedback-meter i {
  display: block;
  width: 34%;
  height: 100%;
  background: linear-gradient(90deg, var(--green), var(--cyan));
  border-radius: inherit;
  animation: feedback-meter 3.4s ease-in-out infinite;
}

.feedback-visual strong {
  position: absolute;
  right: 26px;
  top: 38px;
  color: var(--green);
  font-size: 30px;
  animation: feedback-plus 3.4s ease-in-out infinite;
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.guide-card {
  display: grid;
  align-content: start;
  gap: 12px;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: 0 18px 48px rgba(7, 16, 37, 0.06);
}

.guide-card > span {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: rgba(0, 122, 255, 0.1);
  border-radius: 8px;
  color: #007aff;
  font-size: 13px;
  font-weight: 950;
}

.guide-card h3 {
  margin: 0;
  font-size: 22px;
}

.guide-card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  font-weight: 750;
  line-height: 1.75;
}

.guide-motion {
  position: relative;
  display: grid;
  min-height: 126px;
  padding: 14px;
  overflow: hidden;
  background: linear-gradient(180deg, #f9fbff, #eef5ff);
  border: 1px solid rgba(0, 29, 255, 0.1);
  border-radius: 18px;
}

.memory-guide-motion {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.memory-guide-motion i,
.pronunciation-guide-motion b,
.parts-guide-motion i,
.grammar-guide-motion span {
  display: grid;
  place-items: center;
  min-height: 42px;
  background: white;
  border: 1px solid rgba(0, 29, 255, 0.10);
  border-radius: 12px;
  color: var(--blue);
  font-style: normal;
  font-weight: 950;
  box-shadow: 0 10px 24px rgba(7, 16, 37, 0.07);
}

.memory-guide-motion i,
.parts-guide-motion i {
  animation: guide-step 4.8s ease-in-out infinite;
}

.memory-guide-motion i:nth-child(2),
.pronunciation-guide-motion b:nth-child(2),
.parts-guide-motion i:nth-child(2),
.grammar-guide-motion span:nth-child(2) {
  animation-delay: 0.35s;
}

.memory-guide-motion i:nth-child(3),
.pronunciation-guide-motion b:nth-child(3),
.parts-guide-motion i:nth-child(3),
.grammar-guide-motion span:nth-child(3) {
  animation-delay: 0.7s;
}

.memory-guide-motion i:nth-child(4),
.pronunciation-guide-motion b:nth-child(4),
.parts-guide-motion i:nth-child(4),
.grammar-guide-motion span:nth-child(4) {
  animation-delay: 1.05s;
}

.pronunciation-guide-motion.clearer,
.parts-guide-motion.clearer,
.grammar-guide-motion.clearer {
  grid-template-columns: 1fr;
  align-content: center;
  gap: 8px;
}

.pronunciation-guide-motion b,
.parts-guide-motion i,
.grammar-guide-motion span {
  display: grid;
  grid-template-columns: 54px 1fr;
  align-items: center;
  min-height: 38px;
  padding: 8px 10px;
  color: #007aff;
  animation: guide-wave 3.6s ease-in-out infinite;
}

.parts-guide-motion i {
  color: #f97316;
}

.grammar-guide-motion span {
  color: #7c3aed;
}

.pronunciation-guide-motion b span,
.parts-guide-motion i b,
.grammar-guide-motion span b {
  font-size: 20px;
  line-height: 1;
}

.pronunciation-guide-motion b small,
.parts-guide-motion i small,
.grammar-guide-motion span small {
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
}

.grammar-guide-motion span {
  grid-template-columns: 42px 1fr;
}

@keyframes guide-step {
  0%,
  100% {
    transform: translateY(0);
    border-color: rgba(0, 29, 255, 0.10);
  }

  35%,
  48% {
    transform: translateY(-4px);
    border-color: rgba(0, 122, 255, 0.32);
    box-shadow: 0 14px 30px rgba(0, 122, 255, 0.16);
  }
}

@keyframes guide-wave {
  0%,
  100% {
    transform: scale(1);
  }

  42% {
    transform: scale(1.08);
    background: rgba(0, 122, 255, 0.08);
  }
}

@keyframes guide-sentence {
  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-5px);
  }
}

.science-grid p,
.review-grid p {
  margin-bottom: 0;
  color: var(--muted);
  font-weight: 650;
}

.review-grid article {
  display: grid;
  align-content: start;
  gap: 14px;
}

.review-head {
  display: flex;
  align-items: center;
  gap: 14px;
}

.review-avatar {
  position: relative;
  flex: 0 0 auto;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 34%, white 0 10px, transparent 11px),
    linear-gradient(180deg, rgba(0, 29, 255, 0.95), rgba(47, 124, 255, 0.86));
  box-shadow: 0 14px 28px rgba(0, 29, 255, 0.16);
}

.review-avatar::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 10px;
  height: 19px;
  background: white;
  border-radius: 18px 18px 8px 8px;
}

.student-person {
  background:
    radial-gradient(circle at 50% 34%, white 0 10px, transparent 11px),
    linear-gradient(180deg, #20c35a, #18a64d);
}

.speaker-person {
  background:
    radial-gradient(circle at 50% 34%, white 0 10px, transparent 11px),
    linear-gradient(180deg, #ff3b7f, #d92166);
}

.exam-person {
  background:
    radial-gradient(circle at 50% 34%, white 0 10px, transparent 11px),
    linear-gradient(180deg, #071025, #334155);
}

.review-head strong {
  display: block;
  color: var(--ink);
  font-size: 22px;
  line-height: 1;
  letter-spacing: 0;
}

.review-head small {
  display: block;
  margin-top: 7px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
}

.stars {
  display: inline-block;
  color: #ffb800;
  font-size: 15px;
  letter-spacing: 1px;
  line-height: 1;
  background: linear-gradient(90deg, #ffb800 var(--rating, 96%), rgba(255, 184, 0, 0.28) var(--rating, 96%));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.review-grid span {
  color: var(--ink);
  font-size: 13px;
  font-weight: 900;
}

.value-card {
  grid-column: span 3;
  min-height: 250px;
  padding: 30px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: 0 20px 60px rgba(7, 16, 37, 0.06);
  animation: rise 0.7s ease both;
}

.value-card.primary-value {
  grid-column: span 6;
  display: grid;
  align-content: end;
  min-height: 360px;
  background:
    radial-gradient(circle at 88% 12%, rgba(189, 252, 255, 0.34), transparent 28%),
    linear-gradient(135deg, rgba(0, 29, 255, 0.94), rgba(47, 124, 255, 0.8));
  color: white;
  overflow: hidden;
}

.value-card.primary-value span,
.value-card.primary-value p {
  color: rgba(255, 255, 255, 0.78);
}

.value-card.primary-value h2 {
  max-width: 960px;
  font-size: clamp(58px, 8vw, 110px);
  line-height: 0.98;
}

.value-card.primary-value h2 span {
  display: block;
  color: white;
}

.value-card p {
  color: var(--muted);
  font-weight: 650;
}

.value-visual {
  margin-top: 24px;
  padding: 18px;
  background: rgba(247, 250, 255, 0.82);
  border: 1px solid rgba(0, 29, 255, 0.12);
  border-radius: 20px;
  transform: translateZ(0);
}

.primary-value .value-visual {
  max-width: none;
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.24);
}

.volume-visual {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(240px, 1.05fr);
  gap: clamp(14px, 2.4vw, 22px);
  align-items: center;
  max-width: none;
  min-height: 220px;
}

.volume-books,
.volume-one-app {
  min-width: 0;
}

.volume-books {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.volume-books i,
.volume-one-app small,
.volume-one-app span {
  display: block;
  font-weight: 950;
}

.volume-books i {
  display: grid;
  place-items: center;
  min-height: 72px;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 18px;
  color: white;
  font-style: normal;
  font-size: 18px;
  box-shadow: 0 16px 34px rgba(7, 16, 37, 0.12);
  animation: volume-chip-simple 4.8s ease-in-out infinite;
  animation-delay: calc(var(--i) * 0.14s);
}

.volume-one-app {
  position: relative;
  display: grid;
  align-content: center;
  min-height: 190px;
  padding: clamp(20px, 3vw, 30px);
  overflow: hidden;
  background:
    radial-gradient(circle at 86% 12%, rgba(189, 252, 255, 0.9), transparent 33%),
    linear-gradient(150deg, rgba(255, 255, 255, 0.96), rgba(231, 241, 255, 0.95));
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 24px;
  color: var(--ink);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.82),
    0 22px 46px rgba(7, 16, 37, 0.16);
  animation: app-volume-glow 8s ease-in-out infinite;
}

.volume-one-app::before {
  content: "";
  position: absolute;
  inset: 14px;
  border: 1px solid rgba(0, 29, 255, 0.16);
  border-radius: 16px;
}

.volume-one-app b {
  position: relative;
  width: fit-content;
  margin: 2px 0 6px;
  background: linear-gradient(90deg, var(--blue), #1785ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-size: clamp(68px, 9vw, 108px);
  line-height: 1;
  animation: volume-number 4.8s ease-in-out infinite;
}

.volume-one-app small,
.volume-one-app span {
  position: relative;
}

.volume-one-app small {
  color: rgba(7, 16, 37, 0.62);
  font-size: 13px;
}

.volume-one-app span {
  width: fit-content;
  padding: 7px 10px;
  background: #001dff;
  border-radius: 12px;
  color: white;
  font-size: 14px;
  line-height: 1.28;
  box-shadow: 0 8px 18px rgba(0, 29, 255, 0.18);
}

.value-card.primary-value .volume-one-app span {
  color: white;
}

.volume-visual small,
.count-visual small,
.curve-visual small {
  font-weight: 900;
}

.count-visual {
  display: grid;
  gap: 10px;
  align-content: start;
  min-height: 238px;
}

.count-visual p {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 76px 48px;
  gap: 10px;
  align-items: center;
  margin: 0;
  padding: 11px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(0, 29, 255, 0.1);
  border-radius: 16px;
  animation: count-row-focus 3.6s ease-in-out infinite;
}

.count-visual p:nth-child(2) {
  animation-delay: 0.42s;
}

.count-visual p:nth-child(3) {
  animation-delay: 0.84s;
}

.count-visual span,
.count-visual strong,
.count-visual small {
  min-width: 0;
}

.count-visual span {
  display: grid;
  gap: 4px;
}

.count-visual strong {
  color: var(--ink);
  font-size: 19px;
  line-height: 1;
}

.count-visual span small {
  color: var(--muted);
  font-size: 11px;
}

.count-visual i {
  display: block;
  width: var(--meter);
  height: 8px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  border-radius: 999px;
  animation: count-meter-grow 3.6s ease-in-out infinite;
}

.count-visual p:nth-child(2) i {
  animation-delay: 0.42s;
}

.count-visual p:nth-child(3) i {
  animation-delay: 0.84s;
}

.count-visual b {
  position: relative;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  color: transparent;
  font-size: 0;
  overflow: hidden;
}

.count-visual b::before {
  content: attr(data-before);
}

.count-visual b::after {
  content: attr(data-after);
}

.count-visual b::before,
.count-visual b::after {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  border-radius: inherit;
  font-size: 20px;
  font-weight: 950;
}

.count-visual b::before {
  color: var(--blue);
  animation: count-before-fade 3.6s ease-in-out infinite;
}

.count-visual b::after {
  color: white;
  opacity: 0;
  animation: count-after-rise 3.6s ease-in-out infinite;
}

.count-visual b {
  background: rgba(0, 29, 255, 0.12);
  animation: count-number-increase 3.6s ease-in-out infinite;
}

.count-visual p:nth-child(2) b,
.count-visual p:nth-child(2) b::before,
.count-visual p:nth-child(2) b::after {
  animation-delay: 0.42s;
}

.count-visual p:nth-child(3) b,
.count-visual p:nth-child(3) b::before,
.count-visual p:nth-child(3) b::after {
  animation-delay: 0.84s;
}

.count-visual > small,
.curve-visual small {
  grid-column: 1 / -1;
  color: var(--muted);
}

.curve-visual svg {
  width: 100%;
  height: auto;
  overflow: visible;
}

.curve-axis {
  fill: none;
  stroke: rgba(7, 16, 37, 0.16);
  stroke-width: 3;
  stroke-linecap: round;
}

.forget-curve {
  fill: none;
  stroke: url("#none");
  stroke: var(--blue);
  stroke-width: 7;
  stroke-linecap: round;
  stroke-dasharray: 430;
  animation: curve-draw 2.8s ease-in-out infinite;
}

.curve-dot,
.curve-boost {
  transform-box: fill-box;
  transform-origin: center;
  animation: dot-pulse 1.4s ease-in-out infinite;
}

.curve-dot {
  fill: #ff3b7f;
}

.curve-boost {
  fill: var(--green);
  animation-delay: 0.4s;
}

.mini-swipe {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 150px;
}

.mini-swipe b {
  display: grid;
  place-items: center;
  width: min(220px, 100%);
  height: 120px;
  background: white;
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: 0 20px 44px rgba(7, 16, 37, 0.1);
  font-size: 34px;
  animation: mini-swipe-away 2.4s ease-in-out infinite;
}

.mini-swipe i {
  position: absolute;
  color: var(--green);
  border: 3px solid currentColor;
  border-radius: 12px;
  padding: 4px 8px;
  font-style: normal;
  font-weight: 950;
  opacity: 0;
}

.mini-swipe .known {
  right: 28px;
  top: 20px;
  animation: swipe-known-label 2.8s ease-in-out infinite;
}

.mini-swipe .learning {
  left: 8px;
  bottom: 20px;
  color: #8e8e93;
  animation: swipe-known-label 2.8s ease-in-out 0.35s infinite;
}

.mini-swipe .mastered {
  top: 10px;
  left: 50%;
  color: var(--blue);
  transform: translateX(-50%);
  animation: swipe-mastered-label 2.8s ease-in-out infinite;
}

.mini-widget {
  display: grid;
  gap: 10px;
  align-content: center;
  min-height: 166px;
  background: #fff;
}

.widget-header {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
}

.widget-header i {
  width: 14px;
  height: 12px;
  background:
    linear-gradient(90deg, #34c759 0 22%, transparent 22% 34%, #007aff 34% 58%, transparent 58% 70%, #34c759 70%);
  border-radius: 3px;
}

.widget-row {
  display: flex;
  align-items: first baseline;
  gap: 8px;
  margin: 0;
}

.widget-row b {
  font-size: 38px;
  font-weight: 800;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  animation: count-bump 2.2s ease-in-out infinite;
}

.widget-row span {
  width: fit-content;
  padding: 5px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 900;
}

.widget-row.retained b,
.widget-row.retained span {
  color: #34c759;
}

.widget-row.retained span {
  background: rgba(52, 199, 89, 0.11);
}

.widget-row.mastered b,
.widget-row.mastered span {
  color: #007aff;
}

.widget-row.mastered span {
  background: rgba(0, 122, 255, 0.11);
}

.motion-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.motion-card {
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 22px;
  min-height: 640px;
  padding: 28px;
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid var(--line);
  border-radius: 30px;
  box-shadow: 0 24px 70px rgba(7, 16, 37, 0.08);
  overflow: hidden;
}

.motion-card span {
  display: block;
  color: var(--blue);
  font-size: 12px;
  font-weight: 950;
  text-transform: uppercase;
}

.motion-card p {
  color: var(--muted);
  font-weight: 650;
}

.animated-test-phone,
.detail-demo,
.counter-demo {
  position: relative;
  min-height: 360px;
  padding: 18px;
  background: linear-gradient(180deg, #f9fbff, #eef5ff);
  border: 1px solid rgba(0, 29, 255, 0.12);
  border-radius: 28px;
  transform: translateZ(0);
}

.test-progress {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-weight: 950;
}

.test-progress i {
  flex: 1;
  height: 8px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  border-radius: 999px;
  animation: fill 3.2s ease-in-out infinite;
}

.flip-card {
  position: relative;
  width: min(260px, 100%);
  height: 260px;
  margin: 28px auto 0;
  transform-style: preserve-3d;
  animation: flip-card-cycle 4.8s ease-in-out infinite;
}

.flip-front,
.flip-back {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 10px;
  padding: 24px;
  background: white;
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: 0 22px 58px rgba(7, 16, 37, 0.12);
  backface-visibility: hidden;
}

.flip-front strong,
.flip-back strong {
  font-size: 38px;
  line-height: 1;
}

.flip-front small,
.flip-back small {
  color: var(--muted);
  font-weight: 800;
}

.flip-front b {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  color: white;
  background: var(--blue);
  border-radius: 999px;
  font-size: 22px;
}

.flip-back {
  transform: rotateY(180deg);
}

.flip-back em {
  color: #ff2f78;
  font-style: normal;
  font-size: 30px;
}

.swipe-label {
  position: absolute;
  z-index: 2;
  padding: 8px 12px;
  border: 3px solid currentColor;
  border-radius: 12px;
  font-size: 24px;
  font-weight: 950;
  opacity: 0;
}

.swipe-label.known {
  right: 30px;
  top: 116px;
  color: var(--green);
  animation: swipe-label-known 4.8s ease-in-out infinite;
}

.swipe-label.mastered {
  left: 28px;
  top: 72px;
  color: var(--blue);
  animation: swipe-label-known 4.8s ease-in-out 1.1s infinite;
}

.swipe-label.learning {
  left: 22px;
  bottom: 90px;
  color: #8e8e93;
  font-size: 18px;
  animation: swipe-label-known 4.8s ease-in-out 2.2s infinite;
}

.detail-demo {
  animation: page-slide 5.4s ease-in-out infinite;
}

.detail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.detail-header strong {
  font-size: 30px;
  line-height: 1;
}

.detail-header button {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border: 0;
  border-radius: 999px;
  background: var(--blue);
  color: white;
  font-weight: 950;
  animation: sound-ring 1.8s ease-out infinite;
}

.detail-demo > p {
  color: var(--muted);
  font-weight: 800;
}

.detail-image {
  height: 150px;
  margin-top: 16px;
  border: 1px solid var(--line);
  border-radius: 20px;
  overflow: hidden;
}

.detail-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  animation: detail-image-focus 5.4s ease-in-out infinite;
}

.heart-burst {
  position: absolute;
  right: 32px;
  top: 30px;
  width: 92px;
  height: 92px;
  pointer-events: none;
}

.heart-burst span,
.heart-burst i {
  position: absolute;
  left: 50%;
  top: 50%;
  color: #ff2f78;
  font-style: normal;
}

.heart-burst span {
  font-size: 44px;
  animation: heart-main 3.2s ease-in-out infinite;
}

.heart-burst i {
  font-size: 16px;
  animation: heart-particle 3.2s ease-out infinite;
}

.heart-burst i:nth-child(2) {
  --x: -30px;
  --y: -42px;
}

.heart-burst i:nth-child(3) {
  --x: 28px;
  --y: -46px;
}

.heart-burst i:nth-child(4) {
  --x: -6px;
  --y: -58px;
}

.heart-burst i:nth-child(5) {
  --x: 42px;
  --y: -18px;
}

.page-swipe {
  margin-top: 18px;
  padding: 12px;
  background: rgba(0, 29, 255, 0.07);
  border-radius: 14px;
  color: var(--blue);
  font-weight: 900;
  text-align: center;
}

.counter-widget {
  padding: 22px;
  background: white;
  border: 1px solid rgba(0, 29, 255, 0.14);
  border-radius: 24px;
  box-shadow: 0 20px 48px rgba(0, 29, 255, 0.1);
}

.counter-widget small,
.counter-widget span {
  display: block;
  color: var(--muted);
  font-weight: 900;
}

.counter-widget strong {
  display: block;
  color: var(--green);
  font-size: 78px;
  line-height: 1;
  animation: count-bump 2.4s ease-in-out infinite;
}

.memory-bars {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.memory-bars p {
  display: grid;
  grid-template-columns: minmax(96px, 1fr) 1.25fr auto;
  gap: 12px;
  align-items: center;
  margin: 0;
}

.memory-bars span {
  color: var(--ink);
  font-size: 20px;
  font-weight: 950;
  line-height: 1;
  text-transform: none;
}

.memory-bars i {
  width: var(--meter);
  height: 9px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  border-radius: 999px;
  animation: fill 2.5s ease-in-out infinite;
}

.memory-bars b {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  background: var(--blue);
  border-radius: 12px;
  color: white;
}

.screen-showcase {
  display: grid;
  gap: 18px;
}

.real-screen {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(300px, 0.62fr);
  gap: 40px;
  align-items: center;
  padding: clamp(26px, 5vw, 54px);
  background: #071025;
  border-radius: 30px;
  color: white;
  overflow: hidden;
}

.screen-copy p {
  color: rgba(255, 255, 255, 0.68);
}

.real-screen img {
  justify-self: center;
  width: min(330px, 80vw);
  border-radius: 38px;
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.38);
}

.mock-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.mock-panel {
  min-height: 420px;
  padding: 26px;
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid var(--line);
  border-radius: 26px;
  box-shadow: 0 20px 60px rgba(7, 16, 37, 0.07);
}

.word-list-panel {
  display: grid;
  align-content: start;
}

.word-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.word-row b {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  background: var(--blue);
  border-radius: 14px;
  color: white;
  font-size: 22px;
}

.word-row.mastered b {
  background: #071025;
}

.word-row strong,
.word-row small {
  display: block;
}

.word-row small {
  color: var(--muted);
  font-weight: 800;
}

.word-row i {
  display: block;
  width: var(--meter);
  height: 8px;
  margin-top: 8px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  border-radius: 999px;
  animation: fill 1.1s ease both;
}

.card-stack {
  position: relative;
  min-height: 280px;
  margin-top: 24px;
}

.test-card {
  position: absolute;
  inset: 24px 10px;
  display: grid;
  place-items: center;
  background: white;
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: 0 22px 60px rgba(7, 16, 37, 0.1);
  font-size: 36px;
  font-weight: 950;
}

.test-card.back {
  transform: rotate(-8deg) translate(-8px, 14px);
  color: #071025;
}

.test-card.middle {
  transform: rotate(-1deg) translateY(8px);
  color: var(--blue-2);
}

.test-card.front {
  color: var(--blue);
  animation: swipe 3.8s ease-in-out infinite;
}

.widget-shot {
  margin-top: 22px;
  padding: 24px;
  background: linear-gradient(150deg, #ffffff, #eef5ff);
  border: 1px solid rgba(0, 29, 255, 0.16);
  border-radius: 28px;
  box-shadow: 0 20px 50px rgba(0, 29, 255, 0.12);
}

.widget-shot small,
.widget-shot em {
  display: block;
  color: var(--muted);
  font-style: normal;
  font-weight: 900;
}

.widget-shot strong {
  display: block;
  color: var(--green);
  font-size: 72px;
  line-height: 1;
}

.widget-shot .blue {
  margin-top: 18px;
  color: var(--blue);
}

.price-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(270px, 0.42fr);
  gap: 34px;
  align-items: center;
  padding: clamp(28px, 5vw, 58px);
  background:
    radial-gradient(circle at 84% 12%, rgba(189, 252, 255, 0.5), transparent 30%),
    radial-gradient(circle at 12% 86%, rgba(52, 199, 89, 0.22), transparent 28%),
    linear-gradient(135deg, #071025 0%, #001dff 100%);
  border-radius: 34px;
  color: white;
  box-shadow: 0 30px 90px rgba(0, 29, 255, 0.2);
}

.compare-cards {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
}

.compare-cards article {
  grid-column: span 2;
  display: grid;
  align-content: start;
  gap: 12px;
  min-width: 0;
  padding: 20px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: 0 18px 52px rgba(7, 16, 37, 0.06);
}

.compare-cards article:nth-child(4),
.compare-cards article:nth-child(5) {
  grid-column: span 3;
}

.compare-cards article > span {
  display: inline-grid;
  place-items: center;
  width: fit-content;
  min-height: 32px;
  padding: 0 11px;
  background: rgba(0, 29, 255, 0.08);
  border-radius: 999px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 950;
}

.compare-cards article p,
.compare-cards article > strong {
  display: block;
}

.compare-cards article p {
  position: relative;
  margin: 0;
  padding: 13px 14px 13px 42px;
  border-radius: 16px;
  font-size: 14px;
  font-weight: 800;
  line-height: 1.55;
}

.compare-cards article p::before {
  position: absolute;
  left: 14px;
  top: 15px;
  display: grid;
  place-items: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  font-size: 11px;
  font-weight: 950;
}

.paper-limit {
  background: rgba(247, 250, 255, 0.95);
  border: 1px solid rgba(7, 16, 37, 0.07);
  color: var(--ink);
}

.paper-limit::before {
  content: "紙";
  background: rgba(120, 120, 128, 0.14);
  color: rgba(7, 16, 37, 0.52);
}

.app-advantage {
  background: linear-gradient(135deg, rgba(0, 29, 255, 0.08), rgba(189, 252, 255, 0.22));
  border: 1px solid rgba(0, 29, 255, 0.14);
  color: var(--blue);
  animation: compare-glow 5s ease-in-out infinite;
}

.app-advantage::before {
  content: "AI";
  background: var(--blue);
  color: white;
}

.compare-cards article > strong {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.price-card .eyebrow {
  color: var(--cyan);
}

.sale-ribbon {
  position: relative;
  display: inline-grid;
  grid-template-columns: auto auto;
  align-items: center;
  gap: 8px;
  margin: 6px 0 14px;
  padding: 8px 12px;
  overflow: hidden;
  color: #061538;
  background: linear-gradient(135deg, #fff7a8, #73f7ff 54%, #ffffff);
  border-radius: 999px;
  box-shadow: 0 12px 28px rgba(115, 247, 255, 0.22);
  animation: sale-ribbon-pop 3.6s ease-in-out infinite;
}

.sale-ribbon::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    115deg,
    transparent 0 32%,
    rgba(255, 255, 255, 0.7) 45%,
    transparent 58% 100%
  );
  transform: translateX(-120%);
  animation: sale-ribbon-shine 3.6s ease-in-out infinite;
}

.sale-ribbon span,
.sale-ribbon b {
  position: relative;
  z-index: 1;
}

.sale-ribbon span {
  padding: 3px 7px;
  color: #fff;
  background: var(--blue);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 950;
}

.sale-ribbon b {
  font-size: 14px;
  font-weight: 950;
}

.sale-ribbon i {
  position: absolute;
  right: 10px;
  width: 7px;
  height: 7px;
  background: #001dff;
  border-radius: 999px;
  box-shadow:
    -10px 9px 0 rgba(0, 29, 255, 0.28),
    -20px -3px 0 rgba(0, 29, 255, 0.18);
  animation: sale-confetti 3.6s ease-in-out infinite;
}

.price-card h2 {
  max-width: 10em;
}

.price-card p:not(.eyebrow) {
  max-width: 760px;
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 19px;
  font-weight: 700;
}

.price-breakdown {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 22px;
}

.price-breakdown span {
  min-width: 0;
  padding: 13px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 16px;
}

.price-breakdown b,
.price-breakdown small {
  display: block;
}

.price-breakdown b {
  font-size: 15px;
}

.price-breakdown small {
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.66);
  font-weight: 800;
}

.price-proof {
  min-width: 0;
  padding: 28px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.22), rgba(255, 255, 255, 0.12));
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 28px;
  backdrop-filter: blur(18px);
  box-shadow: 0 24px 58px rgba(0, 0, 0, 0.16);
}

.sale-price-stack {
  position: relative;
  display: inline-block;
}

.sale-price-stack::before {
  content: "40%OFF";
  position: absolute;
  top: 8px;
  right: -18px;
  z-index: 2;
  padding: 5px 8px;
  color: #061538;
  background: #fff7a8;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 950;
  transform: rotate(8deg);
  animation: sale-discount-badge 3.6s ease-in-out infinite;
}

.price-proof strong {
  display: block;
  max-width: 100%;
  font-size: clamp(44px, 5.4vw, 78px);
  line-height: 1;
  letter-spacing: 0;
  white-space: nowrap;
  animation: sale-price-pulse 3.6s ease-in-out infinite;
}

.sale-price-stack > small {
  display: inline-block;
  margin-bottom: 8px;
  color: rgba(255, 255, 255, 0.64);
  font-size: 14px;
  font-weight: 900;
  text-decoration: line-through;
  text-decoration-thickness: 2px;
  animation: sale-old-price 3.6s ease-in-out infinite;
}

.price-proof span {
  display: inline-block;
  margin-top: 10px;
  padding: 7px 11px;
  background: rgba(189, 252, 255, 0.16);
  border: 1px solid rgba(189, 252, 255, 0.3);
  border-radius: 999px;
  color: var(--cyan);
  font-weight: 950;
}

.price-proof p {
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 15px;
  font-weight: 850;
}

.price-proof ul {
  display: grid;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.price-proof li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.13);
  border-radius: 14px;
  font-weight: 850;
}

.price-proof li b,
.price-proof li small {
  display: block;
}

.price-proof li small {
  color: rgba(255, 255, 255, 0.68);
  font-weight: 800;
  text-align: right;
}

.price-store-button {
  width: fit-content;
  margin-top: 24px;
  background: white;
  color: var(--blue);
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.faq-grid article {
  padding: 20px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: 0 16px 42px rgba(7, 16, 37, 0.05);
  animation: rise 0.7s ease both;
}

.faq-grid h3 {
  display: flex;
  gap: 9px;
  align-items: flex-start;
  margin: 0;
  color: var(--ink);
  font-size: 17px;
  font-weight: 950;
  line-height: 1.45;
}

.faq-grid h3 span {
  flex: 0 0 auto;
  display: inline-grid;
  place-items: center;
  min-width: 30px;
  height: 26px;
  padding: 0 7px;
  background: rgba(0, 29, 255, 0.09);
  border-radius: 999px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 950;
}

.faq-grid p {
  position: relative;
  margin: 14px 0 0;
  padding-left: 39px;
  color: var(--muted);
  font-weight: 650;
  line-height: 1.7;
}

.faq-grid p::before {
  content: "A.";
  position: absolute;
  left: 0;
  top: 1px;
  display: inline-grid;
  place-items: center;
  min-width: 30px;
  height: 24px;
  background: rgba(52, 199, 89, 0.11);
  border-radius: 999px;
  color: var(--green);
  font-size: 12px;
  font-weight: 950;
}

.faq-grid p strong {
  color: var(--blue);
  font-weight: 950;
}

.download-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  margin-bottom: 48px;
  padding: 34px;
  box-sizing: border-box;
  background:
    radial-gradient(circle at 90% 18%, rgba(189, 252, 255, 0.24), transparent 28%),
    linear-gradient(135deg, #071025, #001dff);
  border-radius: 30px;
  color: white;
}

.download-section h2 {
  margin-bottom: 8px;
  font-size: clamp(30px, 4vw, 44px);
}

.download-section p:not(.eyebrow) {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.68);
}

.download-section .primary-button {
  background: white;
  color: var(--blue);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 26px clamp(18px, 4vw, 56px);
  color: var(--muted);
  font-size: 14px;
}

.site-footer span {
  color: var(--ink);
  font-weight: 950;
}

@keyframes sale-ribbon-pop {
  0%,
  100% {
    transform: translateY(0) scale(1);
    box-shadow: 0 12px 28px rgba(115, 247, 255, 0.22);
  }

  46% {
    transform: translateY(-2px) scale(1.025);
    box-shadow: 0 18px 38px rgba(115, 247, 255, 0.34);
  }
}

@keyframes sale-ribbon-shine {
  0%,
  30% {
    transform: translateX(-120%);
  }

  52%,
  100% {
    transform: translateX(120%);
  }
}

@keyframes sale-confetti {
  0%,
  100% {
    opacity: 0.35;
    transform: translateY(0) rotate(0deg);
  }

  44% {
    opacity: 1;
    transform: translateY(-4px) rotate(18deg);
  }
}

@keyframes sale-old-price {
  0%,
  100% {
    opacity: 0.58;
  }

  34%,
  58% {
    opacity: 0.34;
  }
}

@keyframes sale-price-pulse {
  0%,
  100% {
    color: #fff;
    text-shadow: none;
    transform: scale(1);
  }

  42%,
  58% {
    color: #ffffff;
    text-shadow:
      0 0 18px rgba(115, 247, 255, 0.58),
      0 0 36px rgba(255, 247, 168, 0.28);
    transform: scale(1.025);
  }
}

@keyframes sale-discount-badge {
  0%,
  100% {
    transform: rotate(8deg) scale(1);
  }

  46% {
    transform: rotate(4deg) scale(1.08);
  }
}

@media (max-width: 980px) {
  .hero,
  .experience-layout,
  .real-screen,
  .price-card,
  .download-section {
    grid-template-columns: 1fr;
  }

  .product-stage {
    min-height: 650px;
  }

  .proof-band,
  .motion-grid,
  .mock-grid,
  .ai-grid,
  .ai-showcase,
  .science-grid,
  .guide-grid,
  .review-grid,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .value-card,
  .value-card.primary-value {
    grid-column: span 6;
  }

  .compare-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .compare-cards article,
  .compare-cards article:nth-child(4),
  .compare-cards article:nth-child(5) {
    grid-column: auto;
  }
}

@media (max-width: 640px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-nav {
    width: 100%;
    justify-content: space-between;
  }

  .hero,
  .proof-band,
  .experience-section,
  .value-section,
  .ai-section,
  .science-section,
  .guide-section,
  .compare-section,
  .screens-section,
  .reviews-section,
  .faq-section,
  .download-section {
    width: min(100% - 28px, 1180px);
  }

  .hero {
    padding-top: 44px;
  }

  h1 {
    font-size: 42px;
    line-height: 1.08;
  }

  h2 {
    font-size: 32px;
  }

  .hero-metrics {
    display: none;
  }

  .gesture-guide {
    grid-template-columns: 1fr;
  }

  .gesture-guide ul {
    grid-template-columns: 1fr;
  }

  .ai-showcase,
  .ai-output-card {
    grid-template-columns: 1fr;
  }

  .ai-proof-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .ai-engine {
    min-height: 180px;
  }

  .product-stage {
    min-height: 620px;
    margin-top: 8px;
    align-content: center;
  }

  .device {
    width: min(255px, 68vw);
  }

  .floating-card {
    min-width: 0;
    padding: 11px 12px;
    border-radius: 14px;
  }

  .floating-card strong {
    font-size: 22px;
  }

  .card-volume {
    top: auto;
    right: auto;
    bottom: 88px;
    left: 0;
    max-width: 150px;
  }

  .card-memory {
    top: auto;
    right: 0;
    left: auto;
    bottom: 32px;
    max-width: 145px;
  }

  .card-widget {
    right: auto;
    bottom: 0;
    left: 26%;
    max-width: 150px;
  }

  .value-section,
  .experience-section,
  .ai-section,
  .science-section,
  .motion-section,
  .compare-section,
  .screens-section,
  .price-section,
  .reviews-section,
  .faq-section {
    padding: 70px 0;
  }

  .value-card {
    min-height: 0;
    padding: 24px;
  }

  .value-card.primary-value {
    min-height: 330px;
    background:
      radial-gradient(circle at 86% 6%, rgba(189, 252, 255, 0.28), transparent 30%),
      linear-gradient(135deg, rgba(0, 29, 255, 0.94), rgba(47, 124, 255, 0.84));
  }

  .value-card.primary-value h2 {
    font-size: 48px;
  }

  .volume-visual {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .volume-books {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 6px;
  }

  .volume-books i {
    min-height: 58px;
    border-radius: 14px;
    font-size: 12px;
  }

  .volume-one-app {
    min-height: 154px;
  }

  .volume-one-app b {
    font-size: clamp(64px, 18vw, 92px);
  }

  .compare-cards {
    grid-template-columns: 1fr;
  }

  .price-card {
    gap: 18px;
  }

  .price-breakdown {
    grid-template-columns: 1fr;
  }

  .price-proof {
    padding: 22px;
  }

  .sale-ribbon {
    max-width: 100%;
    margin-bottom: 12px;
  }

  .sale-price-stack::before {
    top: 4px;
    right: -4px;
    font-size: 11px;
  }

  .price-proof strong {
    font-size: clamp(42px, 13vw, 64px);
  }

  .real-screen {
    padding: 24px;
    border-radius: 24px;
  }

  .swift-phone-shell {
    min-height: min(650px, calc(100dvh - 44px));
    align-items: start;
  }

  .swift-phone {
    width: min(330px, 91vw);
    height: min(642px, calc(100dvh - 56px));
    min-height: 560px;
    aspect-ratio: auto;
    border-radius: 40px;
    padding: 10px;
  }

  .swift-status {
    padding: 7px 20px 6px;
  }

  .swift-nav {
    height: 46px;
  }

  .swift-app {
    height: calc(100% - 25px);
    border-radius: 32px;
  }

  .swift-screen {
    height: calc(100% - 46px);
  }

  .ios-list,
  .ios-test-screen,
  .ios-detail {
    min-height: 100%;
  }

  .ios-test-screen {
    grid-template-rows: auto minmax(340px, 0.86fr) auto;
    gap: 8px;
    padding: 10px;
  }

  .ios-test-header p {
    margin-bottom: 5px;
    font-size: 11px;
  }

  .ios-test-header strong {
    font-size: 15px;
  }

  .ios-progress {
    height: 5px;
  }

  .ios-segmented {
    margin-top: 6px;
  }

  .ios-segmented button {
    min-height: 25px;
    font-size: 12px;
  }

  .ios-test-card {
    min-height: 0;
    height: auto;
    padding: 12px;
    border-radius: 12px;
    overflow: hidden;
  }

  .ios-card-face {
    inset: 12px;
    gap: 8px;
  }

  .ios-card-face.back {
    grid-template-rows: auto auto auto minmax(0, 1fr);
  }

  .ios-card-face.front strong {
    font-size: 34px;
  }

  .ios-card-face.front span {
    font-size: 18px;
  }

  .ios-card-back-head strong {
    font-size: 18px;
  }

  .ios-card-back-head button {
    width: 46px;
    height: 34px;
  }

  .ios-image-placeholder,
  .ios-detail-image {
    min-height: 76px;
    height: clamp(76px, 13dvh, 100px);
  }

  .ios-segmented.icons {
    gap: 2px;
  }

  .ios-card-tab-content {
    min-height: 0;
    height: 100%;
    max-height: none;
    padding-right: 2px;
  }

  .ios-card-example {
    min-height: 0;
    gap: 6px;
  }

  .ios-card-example p {
    font-size: 14px;
    line-height: 1.35;
  }

  .ios-card-example small,
  .ios-card-meaning p {
    font-size: 12.5px;
    line-height: 1.4;
  }

  .ios-card-meaning {
    min-height: 0;
  }

  .ios-card-meaning h4 {
    font-size: 18px;
    margin-bottom: 5px;
  }

  .ios-card-detail-list {
    min-height: 0;
    gap: 7px;
  }

  .ios-card-detail-list b {
    font-size: 12px;
  }

  .ios-card-detail-list span {
    font-size: 12.5px;
    line-height: 1.38;
  }

  .ios-test-actions {
    gap: 6px;
    grid-template-columns: 0.9fr 1fr 0.9fr;
  }

  .ios-test-actions button {
    min-height: 56px;
    padding: 6px 4px;
    border-radius: 14px;
  }

  .ios-test-actions b .sf-icon {
    width: 19px;
    height: 19px;
  }

  .ios-test-actions span {
    font-size: 10.5px;
    white-space: normal;
    word-break: keep-all;
  }

  .mock-panel {
    min-height: 0;
  }

  .motion-card {
    min-height: 0;
    padding: 22px;
  }

  .animated-test-phone,
  .detail-demo,
  .counter-demo {
    min-height: 320px;
  }

  .flip-card {
    height: 230px;
  }

  .download-section {
    align-items: flex-start;
    width: min(100% - 32px, 1180px);
    padding: 32px 22px;
    border-radius: 24px;
  }

  .download-section h2 {
    font-size: 30px;
    line-height: 1.12;
  }

  .download-section p:not(.eyebrow) {
    max-width: 100%;
  }

  .download-section .primary-button {
    width: 100%;
    min-height: 54px;
    justify-content: center;
  }

  .site-footer {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  body:not([data-force-motion="true"]) *,
  body:not([data-force-motion="true"]) *::before,
  body:not([data-force-motion="true"]) *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }
}

.legal-page {
  width: min(100% - 40px, 760px);
  margin: 0 auto;
  padding: 72px 0;
  color: #111827;
}

.legal-page article {
  display: grid;
  gap: 18px;
}

.legal-page h1,
.legal-page h2,
.legal-page p {
  margin: 0;
}

.legal-page h1 {
  font-size: 34px;
  line-height: 1.18;
}

.legal-page h2 {
  margin-top: 20px;
  font-size: 20px;
  line-height: 1.35;
}

.legal-page p {
  font-size: 16px;
  line-height: 1.85;
}

.legal-page a {
  color: #001dff;
}

/* ====================================== */
/* CVR boost pack — 2026-07-02            */
/* sale flag / cta glow / sticky buy bar  */
/* ====================================== */

.hero-sale-flag {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 2px 0 16px;
  padding: 7px 16px 7px 7px;
  border-radius: 999px;
  background: linear-gradient(120deg, #ffffff 0%, #eef1ff 100%);
  border: 1px solid rgba(0, 29, 255, 0.22);
  box-shadow: 0 10px 30px rgba(0, 29, 255, 0.12);
  overflow: hidden;
}

.hero-sale-flag::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 30%, rgba(255, 255, 255, 0.85) 50%, transparent 70%);
  transform: translateX(-130%);
  animation: saleShine 3.2s ease-in-out infinite;
  pointer-events: none;
}

.hero-sale-flag b {
  background: linear-gradient(135deg, #ff3b30, #ff7a00);
  color: #fff;
  font-weight: 950;
  font-size: 13px;
  letter-spacing: 0.02em;
  padding: 6px 12px;
  border-radius: 999px;
  animation: salePulse 2s ease-in-out infinite;
}

.hero-sale-flag span {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13.5px;
  font-weight: 800;
  color: var(--ink);
}

.hero-sale-flag del {
  color: var(--muted);
  font-weight: 700;
  font-size: 13px;
}

.hero-sale-flag strong {
  color: #ff3b30;
  font-size: 20px;
  font-weight: 950;
  line-height: 1;
}

@keyframes saleShine {
  0%, 55% { transform: translateX(-130%); }
  85%, 100% { transform: translateX(130%); }
}

@keyframes salePulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.07); }
}

.cta-note {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  margin: 12px 0 0;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--muted);
}

.cta-note i {
  font-style: normal;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.cta-note i::before {
  content: "✓";
  color: var(--green);
  font-weight: 900;
}

.primary-button.cta-glow {
  position: relative;
  animation: ctaGlow 2.6s ease-in-out infinite;
}

@keyframes ctaGlow {
  0%, 100% {
    box-shadow: 0 18px 44px rgba(0, 29, 255, 0.22);
    transform: translateY(0);
  }
  50% {
    box-shadow: 0 22px 56px rgba(0, 29, 255, 0.42), 0 0 0 6px rgba(0, 29, 255, 0.08);
    transform: translateY(-1px);
  }
}

.primary-button.cta-glow::after {
  content: "→";
  margin-left: 9px;
  display: inline-block;
  animation: ctaArrow 1.4s ease-in-out infinite;
}

@keyframes ctaArrow {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(4px); }
}

.hero-metrics dt del {
  display: block;
  margin-bottom: 2px;
  font-size: 14px;
  font-weight: 800;
  color: var(--muted);
  text-decoration-thickness: 2px;
}

.price-note {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin: 12px 0 0;
  font-size: 13px;
  font-weight: 800;
  color: #c2361f;
}

.price-note::before {
  content: "⏳";
}

.experience-copy .cta-note {
  justify-content: flex-start;
}

/* --- sticky purchase bar --- */
.sticky-cta {
  position: fixed;
  left: 50%;
  bottom: 14px;
  z-index: 9998;
  display: flex;
  align-items: center;
  gap: 14px;
  width: min(640px, calc(100vw - 24px));
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(0, 29, 255, 0.16);
  border-radius: 18px;
  box-shadow: 0 24px 60px rgba(7, 16, 37, 0.22);
  transform: translate(-50%, 140%);
  opacity: 0;
  transition: transform 0.45s cubic-bezier(0.2, 0.9, 0.25, 1), opacity 0.3s ease;
  pointer-events: none;
}

.sticky-cta.is-visible {
  transform: translate(-50%, 0);
  opacity: 1;
  pointer-events: auto;
}

.sticky-cta-info {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  flex: 1;
}

.sticky-cta-info img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  flex-shrink: 0;
}

.sticky-cta-info strong {
  display: block;
  font-size: 14px;
  font-weight: 900;
  color: var(--ink);
  line-height: 1.2;
}

.sticky-cta-info span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.sticky-cta-info del {
  font-size: 11.5px;
  font-weight: 700;
  color: var(--muted);
}

.sticky-cta-info b {
  font-size: 17px;
  font-weight: 950;
  color: #ff3b30;
  line-height: 1;
}

.sticky-cta-info em {
  font-style: normal;
  font-size: 10.5px;
  font-weight: 900;
  color: #fff;
  background: linear-gradient(135deg, #ff3b30, #ff7a00);
  padding: 3px 8px;
  border-radius: 999px;
  animation: salePulse 2s ease-in-out infinite;
  white-space: nowrap;
}

.sticky-cta-button {
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  background: var(--blue);
  color: #fff;
  font-size: 14px;
  font-weight: 900;
  border-radius: 12px;
  text-decoration: none;
  box-shadow: 0 12px 30px rgba(0, 29, 255, 0.3);
}

.sticky-cta-button::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 30%, rgba(255, 255, 255, 0.35) 50%, transparent 70%);
  transform: translateX(-130%);
  animation: saleShine 2.8s ease-in-out infinite;
  pointer-events: none;
}

.sticky-cta-close {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 50%;
  background: rgba(7, 16, 37, 0.07);
  color: var(--muted);
  font-size: 15px;
  font-weight: 800;
  line-height: 1;
  cursor: pointer;
}

@media (max-width: 560px) {
  .sticky-cta {
    gap: 10px;
    padding: 9px 10px;
    bottom: 10px;
    border-radius: 16px;
  }
  .sticky-cta-info img {
    width: 34px;
    height: 34px;
  }
  .sticky-cta-info strong {
    font-size: 12.5px;
  }
  .sticky-cta-info em {
    display: none;
  }
  .sticky-cta-button {
    min-height: 42px;
    padding: 0 14px;
    font-size: 13px;
  }
  .hero-sale-flag span {
    font-size: 12.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero-sale-flag::after,
  .sticky-cta-button::after,
  .hero-sale-flag b,
  .sticky-cta-info em,
  .primary-button.cta-glow,
  .primary-button.cta-glow::after {
    animation: none;
  }
}

/* ====================================== */
/* CVR boost pack 2 — 2026-07-03          */
/* problem section / demo hint / reveal   */
/* ====================================== */

.problem-section {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
  padding: 96px 0 72px;
  scroll-margin-top: 96px;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.problem-card {
  position: relative;
  padding: 26px 24px;
  border-radius: 20px;
  background: linear-gradient(160deg, #ffffff, #f4f6ff);
  border: 1px solid var(--line);
  box-shadow: 0 16px 40px rgba(7, 16, 37, 0.06);
}

.problem-card > span {
  color: rgba(7, 16, 37, 0.24);
  font-weight: 950;
  font-size: 15px;
  letter-spacing: 0.08em;
}

.problem-card h3 {
  margin: 10px 0 8px;
  font-size: 19px;
}

.problem-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14.5px;
  font-weight: 650;
  line-height: 1.75;
}

.problem-visual {
  margin-top: 18px;
  padding: 16px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px dashed rgba(194, 54, 31, 0.35);
  text-align: center;
}

.problem-visual small {
  display: block;
  margin-top: 9px;
  color: #c2361f;
  font-weight: 800;
  font-size: 12px;
}

.leak-bar {
  position: relative;
  height: 26px;
  border-radius: 8px;
  background: rgba(7, 16, 37, 0.07);
  overflow: hidden;
}

.leak-bar i {
  position: absolute;
  inset: 0;
  border-radius: 8px;
  background: linear-gradient(90deg, #20c35a, #9bdc3f);
  transform-origin: left center;
  animation: memoryLeak 3.6s ease-in-out infinite;
}

.leak-bar b {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  font-size: 12px;
  font-weight: 900;
  color: rgba(7, 16, 37, 0.75);
}

@keyframes memoryLeak {
  0%, 12% { transform: scaleX(1); }
  55%, 78% { transform: scaleX(0.3); }
  100% { transform: scaleX(1); }
}

.blur-visual b {
  display: block;
  font-size: 24px;
  font-weight: 950;
  color: var(--ink);
}

.blur-visual i {
  display: block;
  margin-top: 6px;
  font-style: normal;
  font-weight: 800;
  color: var(--muted);
  animation: memBlur 3s ease-in-out infinite;
}

@keyframes memBlur {
  0%, 20% { filter: blur(4px); opacity: 0.55; }
  50% { filter: blur(1.5px); opacity: 0.85; }
  80%, 100% { filter: blur(4px); opacity: 0.55; }
}

.maze-visual i {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin: 6px 6px 0;
  border-radius: 50%;
  background: #c2361f;
  opacity: 0.7;
  animation: mazeWander 2.4s ease-in-out infinite;
}

.maze-visual i:nth-child(2) { animation-delay: 0.35s; }
.maze-visual i:nth-child(3) { animation-delay: 0.7s; }

@keyframes mazeWander {
  0%, 100% { transform: translate(0, 0); }
  25% { transform: translate(7px, -6px); }
  50% { transform: translate(-6px, 4px); }
  75% { transform: translate(4px, 6px); }
}

.problem-bridge {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 34px;
  padding: 28px 32px;
  border-radius: 22px;
  background: linear-gradient(120deg, #071025, #12265c);
  color: #fff;
  box-shadow: 0 26px 60px rgba(7, 16, 37, 0.28);
}

.problem-bridge p {
  margin: 0;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.82);
}

.problem-bridge b {
  display: inline-block;
  font-size: 21px;
  font-weight: 950;
  color: #fff;
}

.problem-bridge .secondary-button {
  background: #fff;
  color: var(--ink);
  border: none;
  flex-shrink: 0;
}

/* scroll reveal */
[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.2, 0.8, 0.25, 1);
}

[data-reveal].in-view {
  opacity: 1;
  transform: none;
}

.problem-card[data-reveal]:nth-child(2) { transition-delay: 0.12s; }
.problem-card[data-reveal]:nth-child(3) { transition-delay: 0.24s; }

/* demo touch hint */
.demo-hint {
  position: absolute;
  z-index: 6;
  top: -16px;
  left: 50%;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: 999px;
  background: var(--blue);
  color: #fff;
  font-weight: 900;
  font-size: 13.5px;
  white-space: nowrap;
  box-shadow: 0 14px 34px rgba(0, 29, 255, 0.35);
  pointer-events: none;
  animation: hintBob 1.6s ease-in-out infinite;
  transition: opacity 0.35s ease;
}

.demo-hint span { font-size: 16px; }

.demo-hint.is-hidden {
  opacity: 0;
  animation: none;
}

@keyframes hintBob {
  0%, 100% { transform: translate(-50%, 0); }
  50% { transform: translate(-50%, 7px); }
}

/* closing note on dark download section */
.download-section .cta-note {
  justify-content: center;
  color: rgba(255, 255, 255, 0.75);
}

.download-section .cta-note i::before {
  color: #7dffb0;
}

@media (max-width: 900px) {
  .problem-grid { grid-template-columns: 1fr; }
  .problem-bridge { justify-content: center; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  .leak-bar i,
  .blur-visual i,
  .maze-visual i,
  .demo-hint {
    animation: none;
  }
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ====================================== */
/* CVR boost pack 3 — 2026-07-03          */
/* pain list / live badge / guide cycle   */
/* ====================================== */

.pain-list {
  display: grid;
  gap: 10px;
}

.pain-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  align-items: stretch;
}

.pain-row p {
  display: flex;
  align-items: center;
  gap: 11px;
  margin: 0;
  padding: 15px 18px;
  border-radius: 14px;
  font-size: 14.5px;
  font-weight: 750;
  line-height: 1.6;
}

.pain-row b {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-size: 13px;
  font-weight: 900;
}

.pain-row .pain {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  color: var(--muted);
}

.pain-row .pain b {
  background: rgba(224, 73, 47, 0.1);
  color: #e0492f;
}

.pain-row .solve {
  background: #fff;
  border: 1px solid rgba(32, 195, 90, 0.32);
  color: var(--ink);
  box-shadow: 0 12px 30px rgba(32, 195, 90, 0.08);
}

.pain-row .solve b {
  background: var(--green);
  color: #fff;
}

.pain-row[data-reveal] .solve {
  opacity: 0;
  transform: translateX(20px);
  transition: opacity 0.6s ease 0.22s, transform 0.6s cubic-bezier(0.2, 0.8, 0.25, 1) 0.22s;
}

.pain-row[data-reveal].in-view .solve {
  opacity: 1;
  transform: none;
}

/* live demo badge */
.live-badge {
  position: absolute;
  z-index: 6;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 999px;
  background: rgba(7, 16, 37, 0.88);
  color: #fff;
  font-size: 12.5px;
  font-weight: 800;
  letter-spacing: 0.04em;
  white-space: nowrap;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: 0 12px 30px rgba(7, 16, 37, 0.25);
  pointer-events: none;
}

.live-badge i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #20c35a;
  animation: livePulse 1.6s ease-in-out infinite;
}

@keyframes livePulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(32, 195, 90, 0.55); }
  50% { box-shadow: 0 0 0 7px rgba(32, 195, 90, 0); }
}

/* guide auto-cycle */
.guide-cycle {
  position: relative;
  display: grid;
  gap: 26px;
  justify-items: center;
  padding: 34px 26px 38px;
  border-radius: 26px;
  background: linear-gradient(150deg, #ffffff, #eef2ff);
  border: 1px solid var(--line);
  box-shadow: 0 24px 60px rgba(7, 16, 37, 0.08);
  overflow: hidden;
}

.guide-cycle-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.guide-cycle-tabs span {
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 800;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid var(--line);
  animation: guideTab 16s infinite;
  animation-delay: calc(var(--d) * 4s);
}

@keyframes guideTab {
  0%, 23% {
    background: var(--blue);
    border-color: var(--blue);
    color: #fff;
    transform: translateY(-2px);
  }
  25%, 100% {
    background: rgba(255, 255, 255, 0.75);
    border-color: var(--line);
    color: var(--muted);
    transform: translateY(0);
  }
}

.guide-cycle-stage {
  position: relative;
  width: 100%;
  min-height: 170px;
}

.guide-slide {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  opacity: 0;
  animation: guideSlide 16s infinite;
  animation-delay: calc(var(--d) * 4s);
}

@keyframes guideSlide {
  0% { opacity: 0; transform: translateY(16px) scale(0.98); }
  3%, 21% { opacity: 1; transform: translateY(0) scale(1); }
  25%, 100% { opacity: 0; transform: translateY(-12px) scale(0.98); }
}

.guide-slide p {
  margin: 0;
  font-size: 15px;
  font-weight: 800;
  color: var(--muted);
}

.cycle-steps {
  display: flex;
  align-items: center;
  gap: 12px;
}

.cycle-steps i {
  font-style: normal;
  padding: 12px 20px;
  border-radius: 13px;
  font-weight: 900;
  font-size: 16px;
  color: #fff;
  background: var(--blue);
}

.cycle-steps i:nth-of-type(2) { background: var(--blue-2); }
.cycle-steps i:nth-of-type(3) { background: var(--green); }

.cycle-steps em {
  font-style: normal;
  font-weight: 900;
  color: var(--muted);
  font-size: 18px;
}

.cycle-phoneme {
  font-size: 46px;
  font-weight: 950;
  color: var(--blue);
  letter-spacing: 0.02em;
}

.cycle-phoneme span {
  display: inline-block;
  font-size: 26px;
  vertical-align: middle;
  animation: phonemeBeat 1.4s ease-in-out infinite;
}

@keyframes phonemeBeat {
  0%, 100% { transform: scale(1); opacity: 0.7; }
  50% { transform: scale(1.25); opacity: 1; }
}

.cycle-pos,
.cycle-svo {
  display: flex;
  gap: 14px;
}

.cycle-pos i,
.cycle-svo i {
  width: 60px;
  height: 60px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  font-style: normal;
  font-weight: 950;
  font-size: 20px;
  color: #fff;
  animation: posBob 2s ease-in-out infinite;
}

.cycle-pos i:nth-of-type(2),
.cycle-svo i:nth-of-type(2) { animation-delay: 0.2s; }
.cycle-pos i:nth-of-type(3),
.cycle-svo i:nth-of-type(3) { animation-delay: 0.4s; }

.pos-n, .cycle-svo i:nth-of-type(1) { background: var(--blue); }
.pos-v, .cycle-svo i:nth-of-type(2) { background: var(--green); }
.pos-a, .cycle-svo i:nth-of-type(3) { background: #ff8a3d; }

@keyframes posBob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-7px); }
}

/* mobile: cut vertical bloat */
@media (max-width: 720px) {
  .value-section,
  .experience-section,
  .ai-section,
  .science-section,
  .guide-section,
  .motion-section,
  .price-section,
  .reviews-section,
  .faq-section,
  .download-section {
    padding: 56px 0;
  }
  .problem-section {
    padding: 56px 0 44px;
  }
  .section-heading {
    margin-bottom: 22px;
  }
  .pain-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }
  .pain-row p {
    padding: 12px 14px;
    font-size: 13.5px;
  }
  .pain-list {
    gap: 14px;
  }
  .guide-cycle-stage {
    min-height: 150px;
  }
  .cycle-phoneme {
    font-size: 36px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .live-badge i,
  .guide-cycle-tabs span,
  .cycle-phoneme span,
  .cycle-pos i,
  .cycle-svo i {
    animation: none;
  }
  .guide-slide {
    animation-duration: 16s;
  }
}

/* ====================================== */
/* CVR boost pack 4 — 2026-07-03          */
/* real vocab-book stack                  */
/* ====================================== */

.book-stack {
  display: grid;
  gap: 7px;
  justify-items: center;
  margin: 0 0 26px;
}

.book-stack i {
  font-style: normal;
  display: flex;
  align-items: center;
  justify-content: center;
  width: min(400px, 100%);
  padding: 13px 18px;
  border-radius: 10px;
  font-weight: 900;
  font-size: 14.5px;
  letter-spacing: 0.04em;
  color: #fff;
  box-shadow: 0 12px 28px rgba(7, 16, 37, 0.2);
}

.book-stack i:nth-of-type(1) { background: linear-gradient(120deg, #1c2f6e, #2a49a8); transform: rotate(-1.2deg); }
.book-stack i:nth-of-type(2) { background: linear-gradient(120deg, #a8281d, #cf4a32); transform: rotate(1.3deg); }
.book-stack i:nth-of-type(3) { background: linear-gradient(120deg, #0f6e46, #1d9c66); transform: rotate(-1deg); }
.book-stack i:nth-of-type(4) { background: linear-gradient(120deg, #3d3277, #5a4bb0); transform: rotate(1.1deg); }

.book-stack b {
  margin-top: 10px;
  font-size: 14px;
  font-weight: 800;
  color: var(--muted);
}

/* stack drops in book-by-book on reveal */
.book-stack[data-reveal] {
  opacity: 1;
  transform: none;
}

.book-stack[data-reveal] i,
.book-stack[data-reveal] b {
  opacity: 0;
  transform: translateY(-22px);
  transition: opacity 0.5s ease, transform 0.55s cubic-bezier(0.2, 0.9, 0.3, 1.2);
}

.book-stack[data-reveal].in-view i:nth-of-type(1) { transition-delay: 0s; }
.book-stack[data-reveal].in-view i:nth-of-type(2) { transition-delay: 0.16s; }
.book-stack[data-reveal].in-view i:nth-of-type(3) { transition-delay: 0.32s; }
.book-stack[data-reveal].in-view i:nth-of-type(4) { transition-delay: 0.48s; }
.book-stack[data-reveal].in-view b { transition-delay: 0.75s; }

.book-stack[data-reveal].in-view i {
  opacity: 1;
}

.book-stack[data-reveal].in-view i:nth-of-type(1) { transform: rotate(-1.2deg); }
.book-stack[data-reveal].in-view i:nth-of-type(2) { transform: rotate(1.3deg); }
.book-stack[data-reveal].in-view i:nth-of-type(3) { transform: rotate(-1deg); }
.book-stack[data-reveal].in-view i:nth-of-type(4) { transform: rotate(1.1deg); }

.book-stack[data-reveal].in-view b {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .book-stack[data-reveal] i,
  .book-stack[data-reveal] b {
    opacity: 1;
    transition: none;
  }
}

/* ====================================== */
/* CVR boost pack 5 — 2026-07-03          */
/* flip cards / coach v2 / next fix / faq */
/* ====================================== */

/* --- pain flip cards --- */
.flip-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.pain-flip {
  perspective: 1100px;
  min-height: 168px;
  display: grid;
}

.pain-flip-inner {
  position: relative;
  width: 100%;
  min-height: 168px;
  transform-style: preserve-3d;
  transition: transform 0.85s cubic-bezier(0.3, 0.7, 0.25, 1);
}

.pain-flip.in-view .pain-flip-inner {
  transform: rotateY(180deg);
  transition-delay: calc(0.55s + var(--fd) * 0.22s);
}

.pain-flip.in-view:hover .pain-flip-inner {
  transform: rotateY(0deg);
  transition-delay: 0s;
}

.pain-face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding: 18px;
  border-radius: 18px;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.pain-face b {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-size: 14px;
  font-weight: 900;
}

.pain-face p {
  margin: 0;
  font-size: 14.5px;
  font-weight: 780;
  line-height: 1.65;
}

.pain-face small {
  margin-top: auto;
  font-size: 11.5px;
  font-weight: 900;
  letter-spacing: 0.04em;
}

.pain-face.front {
  background: #fff;
  border: 1px solid rgba(224, 73, 47, 0.28);
  box-shadow: 0 14px 34px rgba(7, 16, 37, 0.07);
}

.pain-face.front b {
  background: rgba(224, 73, 47, 0.1);
  color: #e0492f;
}

.pain-face.front p { color: var(--muted); }
.pain-face.front small { color: #e0492f; }

.pain-face.back {
  transform: rotateY(180deg);
  background: linear-gradient(155deg, #f0fff5, #ffffff);
  border: 1px solid rgba(32, 195, 90, 0.4);
  box-shadow: 0 18px 40px rgba(32, 195, 90, 0.14);
}

.pain-face.back b {
  background: var(--green);
  color: #fff;
}

.pain-face.back p { color: var(--ink); }
.pain-face.back small { color: #149a48; }

.flip-hint {
  margin: 14px 0 0;
  text-align: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--muted);
}

/* --- demo coach v2: clean tap ripple --- */
.ios-test-coach.v2 strong {
  top: auto;
  bottom: 24px;
  width: auto;
  padding: 10px 18px;
  border: none;
  background: rgba(7, 16, 37, 0.88);
  color: #fff;
  border-radius: 999px;
  font-size: 13px;
  opacity: 1;
  animation: coachBob 1.9s ease-in-out infinite;
  box-shadow: 0 14px 30px rgba(7, 16, 37, 0.28);
}

@keyframes coachBob {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(-5px); }
}

.ios-test-coach.v2 .coach-ring,
.ios-test-coach.v2 .coach-dot {
  position: absolute;
  left: 50%;
  top: 42%;
}

.ios-test-coach.v2 .coach-dot {
  width: 14px;
  height: 14px;
  margin: -7px 0 0 -7px;
  border-radius: 50%;
  background: rgba(0, 29, 255, 0.85);
  animation: coachDotTap 2.2s ease-in-out infinite;
}

.ios-test-coach.v2 .coach-ring {
  width: 58px;
  height: 58px;
  margin: -29px 0 0 -29px;
  border-radius: 50%;
  border: 2.5px solid rgba(0, 29, 255, 0.5);
  background: rgba(0, 29, 255, 0.06);
  opacity: 0;
  animation: coachRipple 2.2s ease-out infinite;
}

.ios-test-coach.v2 .coach-ring.delay {
  animation-delay: 0.55s;
}

@keyframes coachRipple {
  0% { transform: scale(0.35); opacity: 0.85; }
  70% { opacity: 0.25; }
  100% { transform: scale(1.6); opacity: 0; }
}

@keyframes coachDotTap {
  0%, 100% { transform: scale(1); }
  18% { transform: scale(0.72); }
  36% { transform: scale(1); }
}

/* --- download (Next) section: narrow-width fix --- */
.download-section .closing-note {
  grid-column: 1 / -1;
  margin-top: -4px;
}

@media (max-width: 980px) {
  .download-section {
    justify-items: start;
  }
  .download-section .primary-button {
    justify-self: start;
  }
}

@media (max-width: 720px) {
  .download-section {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
    padding: 32px 20px;
    gap: 18px;
  }
  .download-section .primary-button {
    justify-self: center;
    width: 100%;
    max-width: 340px;
    justify-content: center;
  }
  .download-section .cta-note {
    justify-content: center;
  }
  .download-section h2 {
    font-size: clamp(26px, 7.5vw, 34px);
  }
  .download-section h2 span {
    display: block;
  }
}

/* --- FAQ: chiebukuro-style chat --- */
.faq-chat {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.faq-item {
  display: grid;
  gap: 12px;
  padding: 18px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid var(--line);
  box-shadow: 0 14px 34px rgba(7, 16, 37, 0.05);
}

.faq-q {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.faq-q .review-avatar {
  width: 40px;
  height: 40px;
  box-shadow: none;
}

.faq-a {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  justify-content: flex-end;
}

.faq-a img {
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  border-radius: 11px;
  box-shadow: 0 8px 20px rgba(0, 29, 255, 0.16);
}

.faq-bubble {
  padding: 11px 15px;
  min-width: 0;
}

.faq-bubble small {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 4px;
  font-size: 11px;
  font-weight: 800;
  color: var(--muted);
}

.faq-bubble small b {
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--green);
  color: #fff;
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.03em;
}

.faq-bubble p {
  margin: 0;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.75;
  color: var(--ink);
}

.faq-bubble.question {
  background: #eef1ff;
  border-radius: 4px 16px 16px 16px;
}

.faq-bubble.question p {
  font-weight: 850;
}

.faq-bubble.answer {
  background: #fff;
  border: 1px solid rgba(32, 195, 90, 0.32);
  border-radius: 16px 4px 16px 16px;
  box-shadow: 0 10px 26px rgba(32, 195, 90, 0.08);
}

@media (max-width: 980px) {
  .faq-chat { grid-template-columns: 1fr; }
  .flip-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .flip-grid { grid-template-columns: 1fr; }
  .pain-flip,
  .pain-flip-inner { min-height: 138px; }
  .flip-hint { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .ios-test-coach.v2 strong,
  .ios-test-coach.v2 .coach-ring,
  .ios-test-coach.v2 .coach-dot {
    animation: none;
  }
  .ios-test-coach.v2 .coach-ring { opacity: 0.4; }
  .pain-flip.in-view .pain-flip-inner {
    transition: none;
  }
}