.advantage-slide {
  isolation: isolate;
  padding: 0 var(--slide-pad-x);
  align-items: flex-start;
  color: #fff;
  background:
    radial-gradient(circle at 82% 12%, rgba(42, 180, 247, 0.62), transparent 32%),
    radial-gradient(circle at 10% 92%, rgba(32, 210, 190, 0.3), transparent 27%),
    linear-gradient(135deg, #071331 0%, #161a61 56%, #087da2 115%);
}

.advantage-layout {
  width: min(1280px, 100%);
  height: 100svh;
}

.advantage-ambient {
  position: absolute;
  z-index: -1;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.advantage-orbit {
  position: absolute;
  left: 50%;
  border: 1px solid rgba(92, 220, 255, 0.16);
  border-radius: 50%;
  transform: translateX(-50%);
}

.advantage-orbit--outer {
  top: 146px;
  width: 650px;
  height: 650px;
  box-shadow: 0 0 110px rgba(34, 205, 242, 0.13) inset;
}

.advantage-orbit--inner {
  top: 232px;
  width: 477px;
  height: 477px;
  border-color: rgba(110, 120, 255, 0.18);
}

.advantage-beam {
  position: absolute;
  top: 6%;
  left: 50%;
  width: 220px;
  height: 90%;
  background: linear-gradient(180deg, rgba(92, 230, 255, 0.08), transparent 72%);
  filter: blur(10px);
  transform: translateX(-50%) rotate(18deg);
  transform-origin: top center;
}

.advantage-beam--two {
  opacity: 0.7;
  transform: translateX(-50%) rotate(-21deg);
}

.advantage-particle {
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #5ce6ff;
  box-shadow: 0 0 16px rgba(92, 230, 255, 0.9);
}

.advantage-particle--one { top: 24%; left: 22%; }
.advantage-particle--two { top: 69%; left: 78%; background: #50e3c2; }
.advantage-particle--three { top: 82%; left: 35%; }

.advantage-heading {
  position: absolute;
  z-index: 5;
  top: 126px;
  left: 50%;
  width: min(1000px, 100%);
  text-align: center;
  transform: translateX(-50%);
}

.advantage-heading::before {
  display: none;
}

.advantage-heading__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  padding: 5px 12px;
  border: 1px solid rgba(107, 231, 255, 0.36);
  border-radius: 999px;
  color: #7fe8ff;
  background: rgba(25, 167, 223, 0.1);
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.18em;
  box-shadow: 0 0 24px rgba(70, 221, 255, 0.12);
}

.advantage-heading__badge::before,
.advantage-heading__badge::after {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: #67e6ff;
  box-shadow: 0 0 8px #67e6ff;
  content: "";
}

.advantage-heading h2 {
  margin: 0;
  color: #fff;
  font-size: 68px;
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.045em;
  text-shadow: 0 8px 30px rgba(1, 10, 44, 0.44), 0 0 22px rgba(93, 226, 255, 0.18);
}

.advantage-heading h2 span {
  display: inline;
  margin-right: 0.12em;
  color: #7ceaff;
  text-shadow: 0 0 22px rgba(92, 230, 255, 0.32);
}

.advantage-heading h2 span::before {
  display: none;
}

.advantage-heading__spark {
  position: absolute;
  top: 45px;
  color: #83edff;
  font-size: 18px;
  font-style: normal;
  text-shadow: 0 0 16px #5ce6ff;
}

.advantage-heading__spark--left { left: 26%; }
.advantage-heading__spark--right { right: 25%; top: 76px; font-size: 11px; }

.advantage-heading::after {
  display: block;
  width: 120px;
  height: 4px;
  margin: 13px auto 0;
  border-radius: 999px;
  background: linear-gradient(90deg, transparent, #5ce6ff 25%, #50e3c2 75%, transparent);
  box-shadow: 0 0 18px rgba(92, 230, 255, 0.58);
  content: "";
}

.advantage-stage {
  position: absolute;
  inset: 0;
}

.advantage-bucket {
  position: absolute;
  z-index: 3;
  top: 210px;
  left: 50%;
  width: 470px;
  height: 470px;
  object-fit: contain;
  filter: drop-shadow(0 28px 42px rgba(1, 12, 43, 0.48));
  transform: translateX(-50%);
}

.advantage-bucket-glow {
  position: absolute;
  z-index: 2;
  top: 246px;
  left: 50%;
  width: 420px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(53, 225, 255, 0.32), rgba(39, 139, 255, 0.1) 46%, transparent 72%);
  filter: blur(14px);
  transform: translateX(-50%);
}

.advantage-card {
  --advantage-accent: #50e3c2;
  position: absolute;
  z-index: 5;
  width: 356px;
  min-height: 180px;
  padding: 24px 26px;
  border: 1px solid rgba(116, 226, 255, 0.34);
  border-radius: 24px;
  color: #fff;
  background: linear-gradient(145deg, rgba(8, 27, 67, 0.88), rgba(8, 34, 75, 0.66));
  box-shadow: 0 24px 48px rgba(2, 13, 43, 0.3);
  backdrop-filter: blur(12px);
}

.advantage-card::before {
  position: absolute;
  top: 28px;
  left: 0;
  width: 5px;
  height: 52px;
  border-radius: 0 999px 999px 0;
  background: var(--advantage-accent);
  content: "";
}

.advantage-card h3 {
  display: inline-flex;
  align-items: center;
  margin: 0;
  padding: 8px 17px 9px;
  border-radius: 12px;
  color: #fff;
  background: linear-gradient(135deg, color-mix(in srgb, var(--advantage-accent) 90%, white 10%), var(--advantage-accent));
  box-shadow: 0 12px 26px color-mix(in srgb, var(--advantage-accent) 38%, transparent), inset 0 1px rgba(255, 255, 255, 0.48);
  font-size: 29px;
  line-height: 1.1;
  white-space: nowrap;
  text-shadow: 0 2px 5px rgba(3, 13, 43, 0.32);
}

.advantage-card__title-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 11px;
}

.advantage-card__icon {
  display: inline-grid;
  flex: 0 0 auto;
  width: 31px;
  height: 31px;
  place-items: center;
  border: 0;
  border-radius: 0;
  color: #fff;
  background: transparent;
  box-shadow: none;
}

.advantage-card__icon svg {
  width: 26px;
  height: 26px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.advantage-card strong {
  display: block;
  color: #f2f8ff;
  font-size: 16px;
}

.advantage-card p {
  margin: 10px 0 0;
  color: rgba(224, 240, 255, 0.74);
  font-size: 15px;
  font-weight: 550;
  line-height: 1.65;
}

.advantage-card--speak {
  top: 270px;
  left: 4px;
  --advantage-accent: #ff795d;
  cursor: pointer;
  transition: border-color 180ms ease, box-shadow 180ms ease, filter 180ms ease;
}

.advantage-card--speak:hover,
.advantage-card--speak:focus-visible {
  border-color: rgba(255, 154, 130, 0.78);
  box-shadow: 0 26px 62px rgba(2, 13, 43, 0.42), 0 0 0 3px rgba(255, 121, 93, 0.15);
  filter: brightness(1.08);
  outline: none;
}

.advantage-card--memory {
  top: 270px;
  right: 4px;
  --advantage-accent: #63b2ff;
}

.advantage-card--teacher {
  top: 626px;
  left: 50%;
  width: 440px;
  min-height: 138px;
  padding-top: 20px;
  --advantage-accent: #50e3c2;
  transform: translateX(-50%);
}

.advantage-card--teacher div {
  display: flex;
  align-items: center;
  gap: 12px;
}

.advantage-card--teacher h3 {
  margin: 0;
}

.advantage-card--teacher strong {
  white-space: nowrap;
}

.advantage-connector {
  position: absolute;
  z-index: 2;
  width: 118px;
  height: 1px;
  background: linear-gradient(90deg, rgba(86, 226, 255, 0.1), rgba(86, 226, 255, 0.72));
  transform-origin: left center;
}

.advantage-connector--speak {
  top: 421px;
  left: 350px;
  transform: rotate(-4deg);
}

.advantage-connector--memory {
  top: 421px;
  right: 350px;
  transform: rotate(184deg);
  transform-origin: right center;
}

.advantage-connector--teacher {
  top: 601px;
  left: 50%;
  width: 72px;
  transform: rotate(90deg);
}

.advantage-heading,
.advantage-bucket,
.advantage-bucket-glow,
.advantage-card {
  opacity: 0;
}

.advantage-slide.is-live .advantage-heading { animation: advantage-rise 700ms 80ms ease-out both; }
.advantage-slide.is-live .advantage-bucket { animation: advantage-bucket-in 900ms 180ms cubic-bezier(0.2, 0.82, 0.24, 1.05) both; }
.advantage-slide.is-live .advantage-bucket-glow { animation: advantage-glow-in 1100ms 260ms ease-out both, advantage-glow-pulse 3.6s 1.4s ease-in-out infinite; }
.advantage-slide.is-live .advantage-card--speak { animation: advantage-card-left 760ms 420ms ease-out both; }
.advantage-slide.is-live .advantage-card--memory { animation: advantage-card-right 760ms 500ms ease-out both; }
.advantage-slide.is-live .advantage-card--teacher { animation: advantage-card-up 760ms 580ms ease-out both; }
.advantage-slide.is-live .advantage-particle { animation: advantage-particle 4s ease-in-out infinite; }
.advantage-slide.is-live .advantage-heading__spark { animation: advantage-spark 2.4s 800ms ease-in-out infinite; }
.advantage-slide.is-live .advantage-beam--one { animation: advantage-beam-one 8s ease-in-out infinite; }
.advantage-slide.is-live .advantage-beam--two { animation: advantage-beam-two 9s ease-in-out infinite; }
.advantage-slide.is-live .advantage-card h3 { animation: advantage-title-pulse 3.2s 1.2s ease-in-out infinite; }

@keyframes advantage-rise {
  from { opacity: 0; transform: translate(-50%, 20px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

@keyframes advantage-bucket-in {
  from { opacity: 0; transform: translateX(-50%) scale(0.76); filter: blur(7px) drop-shadow(0 28px 42px rgba(1, 12, 43, 0)); }
  to { opacity: 1; transform: translateX(-50%) scale(1); filter: blur(0) drop-shadow(0 28px 42px rgba(1, 12, 43, 0.48)); }
}

@keyframes advantage-glow-in {
  from { opacity: 0; transform: translateX(-50%) scale(0.55); }
  to { opacity: 1; transform: translateX(-50%) scale(1); }
}

@keyframes advantage-glow-pulse {
  0%, 100% { opacity: 0.66; transform: translateX(-50%) scale(0.94); }
  50% { opacity: 1; transform: translateX(-50%) scale(1.08); }
}

@keyframes advantage-card-left {
  from { opacity: 0; transform: translateX(-44px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes advantage-card-right {
  from { opacity: 0; transform: translateX(44px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes advantage-card-up {
  from { opacity: 0; transform: translate(-50%, 36px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

@keyframes advantage-particle {
  0%, 100% { opacity: 0.22; transform: translateY(8px); }
  50% { opacity: 0.86; transform: translateY(-12px); }
}

@keyframes advantage-spark {
  0%, 100% { opacity: 0.38; transform: scale(0.72) rotate(0); }
  50% { opacity: 1; transform: scale(1.18) rotate(38deg); }
}

@keyframes advantage-beam-one {
  0%, 100% { opacity: 0.32; transform: translateX(-50%) rotate(14deg); }
  50% { opacity: 0.8; transform: translateX(-50%) rotate(24deg); }
}

@keyframes advantage-beam-two {
  0%, 100% { opacity: 0.24; transform: translateX(-50%) rotate(-25deg); }
  50% { opacity: 0.66; transform: translateX(-50%) rotate(-15deg); }
}

@keyframes advantage-title-pulse {
  0%, 100% { transform: translateY(0) scale(1); filter: brightness(1); }
  50% { transform: translateY(-3px) scale(1.035); filter: brightness(1.12); }
}

html.has-advantage-dialog {
  overflow: hidden;
  scroll-snap-type: none;
}

.speaking-dialog {
  width: min(1080px, calc(100vw - 48px));
  max-width: none;
  max-height: calc(100svh - 48px);
  margin: auto;
  padding: 0;
  overflow: visible;
  border: 0;
  border-radius: 30px;
  color: #16223a;
  background: transparent;
  box-shadow: 0 34px 110px rgba(0, 8, 35, 0.58);
}

.speaking-dialog::backdrop {
  background: rgba(1, 8, 30, 0.7);
  backdrop-filter: blur(10px);
}

.speaking-dialog[open] {
  animation: speaking-dialog-in 240ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.speaking-dialog__surface {
  max-height: calc(100svh - 48px);
  overflow-x: hidden;
  overflow-y: auto;
  border: 1px solid rgba(173, 204, 226, 0.42);
  border-radius: 30px;
  background:
    radial-gradient(circle at 93% 3%, rgba(101, 214, 190, 0.16), transparent 28%),
    linear-gradient(180deg, #f8fbff 0%, #eef3f9 100%);
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: #b4c4d6 transparent;
}

.speaking-dialog__close {
  position: absolute;
  z-index: 5;
  top: 20px;
  right: 20px;
  width: 44px;
  height: 44px;
  padding: 0;
  display: grid;
  place-items: center;
  border: 1px solid rgba(34, 60, 84, 0.12);
  border-radius: 50%;
  color: #45576c;
  background: rgba(255, 255, 255, 0.84);
  box-shadow: 0 8px 24px rgba(31, 61, 92, 0.11);
  cursor: pointer;
  backdrop-filter: blur(10px);
  transition: color 160ms ease, transform 160ms ease, box-shadow 160ms ease;
}

.speaking-dialog__close:hover,
.speaking-dialog__close:focus-visible {
  color: #0d8c71;
  box-shadow: 0 10px 28px rgba(31, 61, 92, 0.18);
  outline: 3px solid rgba(17, 151, 131, 0.18);
  outline-offset: 2px;
  transform: rotate(4deg) scale(1.04);
}

.speaking-dialog__close svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-width: 2;
}

.speaking-dialog__header {
  padding: 44px 82px 30px;
  text-align: center;
}

.speaking-dialog__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 12px;
  color: #0d8c71;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.09em;
}

.speaking-dialog__eyebrow::before {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #56cdb2;
  box-shadow: 0 0 0 5px rgba(86, 205, 178, 0.12);
  content: "";
}

.speaking-dialog__header h2 {
  margin: 0;
  color: #142039;
  font-size: clamp(34px, 4vw, 54px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.055em;
}

.speaking-dialog__header h2 span {
  display: block;
  color: #119783;
}

.speaking-contrast {
  padding: 0 34px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.speaking-contrast__card {
  position: relative;
  isolation: isolate;
  min-height: 290px;
  padding: 24px 28px 26px;
  overflow: hidden;
  border: 1px solid rgba(105, 81, 25, 0.08);
  border-radius: 24px;
  color: #68490f;
  background: #fff1bd;
}

.speaking-contrast__card::before {
  position: absolute;
  z-index: -1;
  top: -110px;
  right: -100px;
  width: 300px;
  height: 300px;
  border: 1px solid currentColor;
  border-radius: 50%;
  opacity: 0.08;
  content: "";
}

.speaking-contrast__card--speak {
  border-color: rgba(20, 105, 81, 0.08);
  color: #0d5b46;
  background: #def3e8;
}

.speaking-contrast__type {
  width: max-content;
  min-height: 60px;
  padding: 7px 18px 7px 8px;
  display: flex;
  align-items: center;
  gap: 9px;
  border: 1px solid rgba(104, 73, 15, 0.12);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.62);
  font-size: 22px;
  font-weight: 900;
  box-shadow: 0 10px 26px rgba(75, 55, 20, 0.07);
}

.speaking-contrast__card--speak .speaking-contrast__type {
  border-color: rgba(13, 91, 70, 0.12);
  box-shadow: 0 10px 26px rgba(13, 91, 70, 0.07);
}

.speaking-contrast__type img {
  width: 54px;
  height: 54px;
  object-fit: contain;
  filter: drop-shadow(0 7px 8px rgba(75, 55, 20, 0.12));
}

.speaking-contrast__body {
  margin-top: 18px;
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  align-items: center;
  gap: 24px;
}

.speaking-contrast__body h3 {
  margin: 0;
  color: #111a2b;
  font-size: 80px;
  line-height: 1;
  letter-spacing: -0.09em;
  text-shadow: 0 8px 22px rgba(31, 61, 92, 0.1);
}

.speaking-contrast__body > div {
  padding-left: 22px;
  border-left: 1px solid rgba(104, 73, 15, 0.16);
}

.speaking-contrast__card--speak .speaking-contrast__body > div {
  border-left-color: rgba(13, 91, 70, 0.16);
}

.speaking-contrast__body strong {
  display: block;
  color: #151e30;
  font-size: 18px;
  line-height: 1.5;
}

.speaking-contrast__body p {
  margin: 9px 0 0;
  color: #39485b;
  font-size: 14px;
  line-height: 1.65;
}

.speaking-contrast__body small {
  margin-top: 12px;
  display: block;
  color: #778495;
  font-size: 12px;
  line-height: 1.55;
}

.speaking-dialog__conclusion {
  margin: 16px 34px 34px;
  padding: 21px 26px;
  border: 1px solid rgba(17, 151, 131, 0.14);
  border-radius: 20px;
  color: #465569;
  background: linear-gradient(115deg, #fff7dc, #ecf8ef);
  font-size: 16px;
  line-height: 1.65;
}

.speaking-dialog__conclusion > span {
  margin-right: 12px;
  padding: 6px 11px;
  border-radius: 999px;
  color: #fff;
  background: #0f856a;
  font-size: 12px;
  font-weight: 900;
  white-space: nowrap;
}

.speaking-dialog__conclusion strong {
  color: #0b654f;
}

@keyframes speaking-dialog-in {
  from { opacity: 0; transform: translateY(18px) scale(0.975); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.teacher-support-dialog {
  width: min(1500px, calc(100vw - 40px));
  max-width: none;
  max-height: calc(100svh - 40px);
  margin: auto;
  padding: 0;
  overflow: visible;
  border: 0;
  border-radius: 18px;
  background: transparent;
  box-shadow: 0 34px 110px rgba(0, 8, 35, 0.58);
}

.teacher-support-dialog::backdrop {
  background: rgba(1, 8, 30, 0.82);
  backdrop-filter: blur(10px);
}

.teacher-support-dialog[open] {
  animation: speaking-dialog-in 240ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.teacher-support-dialog__images {
  max-height: calc(100svh - 40px);
  overflow-x: hidden;
  overflow-y: auto;
  border-radius: 18px;
  background: #fff;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: #8ea1b8 transparent;
}

.teacher-support-dialog__images img {
  width: 100%;
  height: auto;
  display: block;
}

.teacher-support-dialog__close {
  position: absolute;
  z-index: 5;
  top: 14px;
  right: 14px;
  width: 44px;
  height: 44px;
  padding: 0;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  color: #fff;
  background: rgba(8, 19, 42, 0.72);
  box-shadow: 0 8px 24px rgba(0, 8, 35, 0.24);
  cursor: pointer;
  backdrop-filter: blur(10px);
}

.teacher-support-dialog__close:hover,
.teacher-support-dialog__close:focus-visible {
  background: rgba(8, 19, 42, 0.92);
  outline: 3px solid rgba(255, 255, 255, 0.45);
  outline-offset: 2px;
}

.teacher-support-dialog__close svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-width: 2;
}

@media (min-width: 1700px) and (min-height: 950px) {
  .advantage-layout {
    transform: scale(1.1);
    transform-origin: top center;
  }
}

@media (min-width: 761px) and (max-height: 780px) {
  .advantage-heading { top: 92px; }
  .advantage-heading h2 { font-size: 44px; }
  .advantage-heading__badge { display: none; }
  .advantage-heading::after { margin-top: 8px; }
  .advantage-heading__spark { top: 18px; }
  .advantage-heading__spark--right { top: 43px; }
  .advantage-orbit--outer { top: 124px; width: 520px; height: 520px; }
  .advantage-orbit--inner { top: 196px; width: 380px; height: 380px; }
  .advantage-bucket { top: 166px; width: 392px; height: 392px; }
  .advantage-bucket-glow { top: 194px; width: 360px; height: 310px; }
  .advantage-card { width: 310px; min-height: 158px; padding: 18px 22px; }
  .advantage-card h3 { padding: 6px 12px 7px; font-size: 24px; }
  .advantage-card__title-row { gap: 8px; margin-bottom: 8px; }
  .advantage-card__icon { width: 26px; height: 26px; }
  .advantage-card__icon svg { width: 21px; height: 21px; }
  .advantage-card strong { font-size: 14px; }
  .advantage-card p { margin-top: 7px; font-size: 13px; line-height: 1.55; }
  .advantage-card--speak,
  .advantage-card--memory { top: 220px; }
  .advantage-card--teacher { top: 472px; width: 400px; min-height: 126px; }
  .advantage-connector--speak { top: 361px; left: 300px; }
  .advantage-connector--memory { top: 361px; right: 300px; }
  .advantage-connector--teacher { top: 448px; }
}

@media (max-width: 760px) {
  .advantage-slide {
    min-height: 100svh;
    padding: 82px 18px 84px;
  }

  .advantage-layout {
    height: auto;
    min-height: calc(100svh - 166px);
  }

  .advantage-heading {
    position: relative;
    top: auto;
    left: auto;
    width: 100%;
    transform: none;
  }

  .advantage-heading h2 { font-size: clamp(38px, 11vw, 46px); }
  .advantage-heading__badge { margin-bottom: 4px; padding: 4px 9px; font-size: 8px; }
  .advantage-heading__spark { display: none; }
  .advantage-heading::after { width: 86px; height: 3px; margin-top: 9px; }

  .advantage-stage {
    position: relative;
    inset: auto;
    margin-top: 10px;
    padding-top: 230px;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 9px;
  }

  .advantage-orbit--outer { top: 150px; width: 300px; height: 300px; }
  .advantage-orbit--inner { top: 192px; width: 216px; height: 216px; }
  .advantage-bucket { top: 0; width: 225px; height: 225px; }
  .advantage-bucket-glow { top: 18px; width: 250px; height: 190px; }

  .advantage-card,
  .advantage-card--speak,
  .advantage-card--memory,
  .advantage-card--teacher {
    position: relative;
    top: auto;
    right: auto;
    left: auto;
    width: auto;
    min-height: 0;
    padding: 14px 14px 14px 16px;
    border-radius: 17px;
    transform: none;
  }

  .advantage-card::before { top: 18px; height: 38px; width: 4px; }
  .advantage-card h3 { margin: 0 0 7px; padding: 6px 10px; border-radius: 9px; font-size: 20px; }
  .advantage-card__title-row { gap: 6px; margin-bottom: 7px; }
  .advantage-card__title-row h3 { margin: 0; }
  .advantage-card__icon { width: 22px; height: 22px; }
  .advantage-card__icon svg { width: 20px; height: 20px; }
  .advantage-card strong { font-size: 11px; line-height: 1.4; }
  .advantage-card p { margin-top: 6px; font-size: 11px; line-height: 1.48; }
  .advantage-card--teacher { grid-column: 1 / -1; }
  .advantage-card--teacher div { gap: 7px; }
  .advantage-card--teacher h3 { margin: 0; }
  .advantage-card--teacher strong { font-size: 12px; }
  .advantage-connector { display: none; }

  .advantage-slide.is-live .advantage-heading { animation-name: advantage-mobile-rise; }
  .advantage-slide.is-live .advantage-card--teacher { animation-name: advantage-mobile-card-up; }

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

  @keyframes advantage-mobile-card-up {
    from { opacity: 0; transform: translateY(28px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .speaking-dialog {
    width: calc(100vw - 20px);
    max-height: calc(100svh - 20px);
    border-radius: 22px;
  }

  .speaking-dialog__surface {
    max-height: calc(100svh - 20px);
    border-radius: 22px;
  }

  .speaking-dialog__close {
    top: 14px;
    right: 14px;
    width: 40px;
    height: 40px;
  }

  .speaking-dialog__header {
    padding: 58px 24px 24px;
  }

  .speaking-dialog__header h2 {
    font-size: clamp(30px, 9.4vw, 40px);
  }

  .speaking-contrast {
    padding: 0 12px;
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .speaking-contrast__card {
    min-height: 0;
    padding: 18px 20px 20px;
    border-radius: 18px;
  }

  .speaking-contrast__type {
    min-height: 48px;
    padding: 5px 13px 5px 6px;
    border-radius: 14px;
    font-size: 18px;
  }

  .speaking-contrast__type img {
    width: 44px;
    height: 44px;
  }

  .speaking-contrast__body {
    margin-top: 13px;
    grid-template-columns: 60px minmax(0, 1fr);
    gap: 14px;
  }

  .speaking-contrast__body h3 {
    font-size: 58px;
  }

  .speaking-contrast__body > div {
    padding-left: 14px;
  }

  .speaking-contrast__body strong { font-size: 15px; }
  .speaking-contrast__body p { margin-top: 5px; font-size: 12px; line-height: 1.55; }
  .speaking-contrast__body small { margin-top: 7px; font-size: 10px; }

  .speaking-dialog__conclusion {
    margin: 10px 12px 12px;
    padding: 18px;
    font-size: 13px;
  }

  .speaking-dialog__conclusion > span {
    width: max-content;
    margin: 0 0 9px;
    display: block;
  }

  .teacher-support-dialog {
    width: calc(100vw - 12px);
    max-height: calc(100svh - 12px);
    border-radius: 12px;
  }

  .teacher-support-dialog__images {
    max-height: calc(100svh - 12px);
    border-radius: 12px;
  }

  .teacher-support-dialog__close {
    top: 10px;
    right: 10px;
    width: 40px;
    height: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .advantage-heading,
  .advantage-bucket,
  .advantage-bucket-glow,
  .advantage-card {
    opacity: 1;
  }

  .advantage-heading__spark,
  .advantage-beam,
  .advantage-card h3 {
    animation: none !important;
  }

  .speaking-dialog[open] {
    animation: none;
  }

  .teacher-support-dialog[open] {
    animation: none;
  }
}