/*
 * Scratch点酷网“关于本站”页面 v1.4.0。
 * 视觉语言与 Scratch 程序分析工具一致：奶油色点阵背景、深色描边、
 * 错位阴影、蓝黄薄荷配色与积木小老师形象。
 */

.dianku-about-main {
  min-width: 320px;
  overflow: hidden;
  padding: 1px 0 48px;
  background:
    radial-gradient(circle at 21px 21px, rgba(85, 136, 245, 0.075) 0 2px, transparent 3px) 0 0 / 42px 42px,
    linear-gradient(180deg, #fff9ed 0%, #fffdf8 54%, #f5fbff 100%);
}

.dianku-about-page {
  --cream: #fff9ed;
  --paper: #fffefb;
  --ink: #292b4a;
  --muted-ink: #73758c;
  --line: #e5dacb;
  --blue: #5588f5;
  --blue-dark: #3764d2;
  --blue-soft: #eaf1ff;
  --yellow: #ffc94f;
  --yellow-soft: #fff3bd;
  --mint: #45caa4;
  --mint-soft: #def8ef;
  --coral: #ff786d;
  --coral-soft: #ffe4df;
  --purple: #896be8;
  --purple-soft: #eee8ff;
  --orange: #ff972f;
  --orange-soft: #fff0dc;
  width: min(1280px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 34px;
  color: var(--ink);
  font-family: "Nunito", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

.dianku-about-page,
.dianku-about-page * {
  box-sizing: border-box;
}

.dianku-about-page h1,
.dianku-about-page h2,
.dianku-about-page h3,
.dianku-about-page p {
  padding: 0;
}

.dianku-about-page a {
  text-decoration: none;
}

.dianku-about-page a:hover {
  text-decoration: none;
}

.dianku-about-page a:focus-visible,
.dianku-about-page summary:focus-visible {
  outline: 3px solid rgba(85, 136, 245, 0.38);
  outline-offset: 3px;
}

.dianku-about-page svg:not(.dk-about-icon-sprite) {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.dk-about-icon-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.dianku-about-page a,
.dianku-about-page button,
.dianku-about-page summary {
  -webkit-tap-highlight-color: transparent;
}

.about-hero-actions svg,
.about-final-cta svg {
  width: 17px;
  height: 17px;
}

.about-new-hero {
  position: relative;
  isolation: isolate;
  min-height: 510px;
  display: grid;
  grid-template-columns: minmax(0, 1.13fr) minmax(390px, 0.87fr);
  align-items: center;
  gap: 28px;
  overflow: hidden;
  padding: 46px clamp(34px, 5vw, 72px);
  border: 3px solid var(--ink);
  border-radius: 30px 26px 32px 25px;
  background:
    radial-gradient(circle at 72px 72px, rgba(255, 255, 255, 0.84) 0 4px, transparent 5px) 0 0 / 72px 72px,
    linear-gradient(135deg, #f4f7ff 0%, #edf3ff 51%, #e2f9f1 100%);
  box-shadow: 9px 10px 0 rgba(41, 43, 74, 0.11);
}

.about-new-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -175px;
  left: -155px;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: rgba(255, 201, 79, 0.46);
}

.about-new-hero-copy {
  position: relative;
  z-index: 4;
  max-width: 790px;
}

.about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 12px;
  color: #2d6a59;
  border: 2px solid #68bca4;
  border-radius: 11px 14px 10px 13px;
  background: #effff9;
  box-shadow: 3px 4px 0 rgba(46, 138, 112, 0.12);
  font-size: 12px;
  font-weight: 950;
}

.about-kicker svg {
  width: 16px;
  height: 16px;
}

.about-new-hero h1 {
  max-width: 720px;
  margin: 18px 0 14px;
  font-size: clamp(32px, 3vw, 44px);
  font-weight: 950;
  letter-spacing: -0.052em;
  line-height: 1.16;
}

.about-new-hero h1 span {
  color: var(--blue-dark);
  background: linear-gradient(transparent 72%, rgba(255, 201, 79, 0.78) 0);
}

.about-new-hero-copy > p {
  max-width: 740px;
  margin: 0;
  color: #5e6178;
  font-size: 16px;
  font-weight: 720;
  line-height: 1.75;
}

.about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 11px;
  margin-top: 22px;
}

.about-hero-actions .about-action {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding-inline: 18px;
  border: 2px solid var(--ink);
  border-radius: 13px 16px 12px 15px;
  box-shadow: 4px 5px 0 rgba(41, 43, 74, 0.14);
  font-size: 13px;
  font-weight: 950;
  line-height: 1.2;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.about-hero-actions .about-action:hover {
  transform: translateY(-2px);
  box-shadow: 4px 7px 0 rgba(41, 43, 74, 0.16);
}

.about-hero-actions .about-action:first-child {
  color: #fff;
  background: var(--blue);
}

.about-hero-actions .about-action:last-child {
  color: var(--blue-dark);
  background: #fff;
}

.about-proof-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.about-proof-chips span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 7px 10px;
  color: #4d6079;
  border: 1px solid #cbd8ec;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.76);
  font-size: 11px;
  font-weight: 900;
}

.about-proof-chips svg {
  width: 14px;
  height: 14px;
  color: var(--mint);
}

.about-hero-stage {
  position: relative;
  align-self: stretch;
  min-height: 410px;
}

.about-mascot-wrap {
  position: absolute;
  z-index: 2;
  right: -58px;
  bottom: -116px;
  width: 390px;
}

.about-mascot-wrap::before {
  content: "";
  position: absolute;
  z-index: -1;
  right: 7px;
  bottom: 100px;
  width: 330px;
  height: 330px;
  border-radius: 50%;
  background: rgba(110, 130, 223, 0.13);
}

.about-mascot-wrap img {
  display: block;
  width: 100%;
  height: auto;
  filter: drop-shadow(0 18px 14px rgba(34, 31, 72, 0.22));
}

.about-stage-equation {
  position: absolute;
  z-index: 4;
  top: 31px;
  left: 0;
  width: min(350px, 92%);
  padding: 16px 18px;
  border: 2px solid var(--ink);
  border-radius: 18px 14px 20px 15px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 5px 6px 0 var(--yellow);
  transform: rotate(-1.2deg);
}

.about-stage-equation > small {
  display: block;
  color: var(--blue-dark);
  font-size: 10px;
  font-weight: 950;
}

.about-stage-equation strong {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 7px;
  font-size: 17px;
  font-weight: 950;
}

.about-stage-equation strong span {
  padding: 6px 9px;
  border-radius: 9px;
  background: var(--blue-soft);
}

.about-stage-equation strong span:last-child {
  background: var(--purple-soft);
}

.about-stage-equation strong b {
  color: var(--orange);
}

.about-stage-equation p {
  margin: 9px 0 0;
  color: #6f7286;
  font-size: 11px;
  font-weight: 800;
}

.about-stage-card {
  position: absolute;
  z-index: 5;
  min-width: 210px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 13px;
  border: 2px solid var(--ink);
  border-radius: 14px 11px 16px 12px;
  background: #fff;
  box-shadow: 4px 5px 0 rgba(41, 43, 74, 0.13);
}

.about-stage-card > svg {
  flex: none;
  width: 38px;
  height: 38px;
  padding: 8px;
  color: #fff;
  border: 2px solid var(--ink);
  border-radius: 11px;
}

.about-stage-card small,
.about-stage-card strong {
  display: block;
}

.about-stage-card small {
  color: #7b7c8e;
  font-size: 9px;
  font-weight: 900;
}

.about-stage-card strong {
  margin-top: 2px;
  font-size: 12px;
  font-weight: 950;
}

.stage-resource {
  top: 173px;
  left: -20px;
  transform: rotate(1.5deg);
}

.stage-resource > svg {
  background: var(--blue);
}

.stage-analysis {
  right: -20px;
  bottom: 41px;
  transform: rotate(-1.5deg);
}

.stage-analysis > svg {
  background: var(--purple);
}

.about-position-strip {
  width: min(1280px, calc(100% - 42px));
  display: grid;
  grid-template-columns: minmax(260px, 0.78fr) minmax(0, 1.4fr) auto;
  align-items: center;
  gap: 28px;
  margin: 25px auto 0;
  padding: 19px 23px;
  border: 2px solid var(--ink);
  border-radius: 19px 16px 21px 17px;
  background: #fff;
  box-shadow: 5px 6px 0 rgba(41, 43, 74, 0.08);
  scroll-margin-top: 105px;
}

.position-strip-title > span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--blue-dark);
  font-size: 10px;
  font-weight: 950;
}

.position-strip-title svg {
  width: 14px;
  height: 14px;
}

.position-strip-title h2 {
  margin: 4px 0 0;
  font-size: 20px;
  font-weight: 950;
  letter-spacing: -0.025em;
}

.about-position-strip > p {
  margin: 0;
  padding: 0 28px;
  color: #62657a;
  border-right: 1px dashed #d7cdc1;
  border-left: 1px dashed #d7cdc1;
  font-size: 14px;
  font-weight: 720;
  line-height: 1.68;
}

.about-position-strip > p span,
.about-position-strip > p strong {
  color: var(--ink);
  font-weight: 950;
}

.position-strip-tags {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}

.position-strip-tags span {
  padding: 5px 9px;
  color: #376b5d;
  border-radius: 999px;
  background: var(--mint-soft);
  font-size: 10px;
  font-weight: 900;
}

.about-section {
  width: min(1240px, 100%);
  margin: 72px auto 0;
  scroll-margin-top: 105px;
}

.about-section-heading {
  max-width: 860px;
  margin: 0 auto 27px;
  text-align: center;
}

.about-section-heading > span,
.about-section-heading > div > span {
  color: var(--blue-dark);
  font-size: 12px;
  font-weight: 950;
}

.about-section-heading h2 {
  margin: 7px 0 9px;
  font-size: clamp(30px, 3.2vw, 43px);
  font-weight: 950;
  letter-spacing: -0.044em;
  line-height: 1.18;
}

.about-section-heading p {
  margin: 0;
  color: var(--muted-ink);
  font-size: 14px;
  font-weight: 720;
  line-height: 1.72;
}

.course-feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 15px;
}

.course-feature-card {
  min-height: 170px;
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  align-items: start;
  gap: 14px;
  padding: 20px;
  border: 2px solid #dcd3c8;
  border-radius: 20px 16px 22px 17px;
  background: linear-gradient(145deg, #fff 52%, var(--tone-soft));
  box-shadow: 4px 5px 0 color-mix(in srgb, var(--tone) 14%, transparent);
}

.course-feature-icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  color: #fff;
  border: 2px solid var(--ink);
  border-radius: 15px 12px 16px 13px;
  background: var(--tone);
  box-shadow: 3px 4px 0 rgba(41, 43, 74, 0.12);
}

.course-feature-icon svg {
  width: 25px;
  height: 25px;
}

.course-feature-card h3 {
  margin: 2px 0 7px;
  font-size: 16px;
  font-weight: 950;
}

.course-feature-card p {
  margin: 0;
  color: #66697d;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.65;
}

.course-feature-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  margin: 17px 0 0;
  color: #61657a;
  font-size: 11px;
  font-weight: 800;
  text-align: center;
}

.course-feature-note svg {
  flex: none;
  width: 16px;
  height: 16px;
  color: var(--mint);
}

.teacher-answer-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.tone-blue {
  --tone: var(--blue);
  --tone-soft: var(--blue-soft);
}

.tone-purple {
  --tone: var(--purple);
  --tone-soft: var(--purple-soft);
}

.tone-orange {
  --tone: var(--orange);
  --tone-soft: var(--orange-soft);
}

.tone-mint {
  --tone: var(--mint);
  --tone-soft: var(--mint-soft);
}

.teacher-answer-card {
  min-height: 192px;
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  align-items: start;
  gap: 16px;
  padding: 22px;
  border: 2px solid var(--ink);
  border-radius: 22px 17px 24px 18px;
  background: linear-gradient(145deg, #fff 48%, var(--tone-soft));
  box-shadow: 5px 6px 0 color-mix(in srgb, var(--tone) 17%, transparent);
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.teacher-answer-card:hover {
  transform: translateY(-3px);
  box-shadow: 5px 9px 0 color-mix(in srgb, var(--tone) 20%, transparent);
}

.teacher-answer-icon {
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  color: #fff;
  border: 2px solid var(--ink);
  border-radius: 16px 13px 17px 14px;
  background: var(--tone);
  box-shadow: 3px 4px 0 rgba(41, 43, 74, 0.14);
}

.teacher-answer-icon svg {
  width: 27px;
  height: 27px;
}

.teacher-answer-card small {
  color: var(--tone);
  font-size: 10px;
  font-weight: 950;
}

.teacher-answer-card h3 {
  margin: 5px 0 8px;
  font-size: 18px;
  font-weight: 950;
  letter-spacing: -0.02em;
}

.teacher-answer-card p {
  margin: 0;
  color: #64677b;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.66;
}

.teacher-answer-card > div:last-child > span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 12px;
  color: color-mix(in srgb, var(--tone) 76%, #27304b);
  font-size: 11px;
  font-weight: 950;
}

.teacher-answer-card > div:last-child > span svg {
  width: 14px;
  height: 14px;
}

.about-products {
  width: min(1320px, 100%);
  margin: 76px auto 0;
  padding: 42px 38px 45px;
  color: #fff;
  border: 3px solid var(--ink);
  border-radius: 30px 24px 33px 25px;
  background:
    radial-gradient(circle at 42px 42px, rgba(255, 255, 255, 0.05) 0 3px, transparent 4px) 0 0 / 52px 52px,
    linear-gradient(125deg, #2c2d50, #463b76);
  box-shadow: 8px 9px 0 var(--yellow);
}

.light-heading > span {
  color: #a9ead5;
}

.light-heading p {
  color: rgba(255, 255, 255, 0.7);
}

.about-product-panels {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.product-panel {
  min-width: 0;
  padding: 25px;
  color: var(--ink);
  border: 2px solid rgba(255, 255, 255, 0.82);
  border-radius: 22px 17px 25px 18px;
  background: #fff;
  box-shadow: 5px 6px 0 rgba(11, 10, 38, 0.24);
  scroll-margin-top: 105px;
}

.resource-panel {
  background: linear-gradient(145deg, #fff, #eef4ff);
}

.analysis-panel {
  background: linear-gradient(145deg, #fff, #f1edff);
}

.product-panel-top {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  align-items: start;
  gap: 15px;
}

.product-panel-icon {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  color: #fff;
  border: 2px solid var(--ink);
  border-radius: 16px 13px 18px 14px;
  background: var(--blue);
  box-shadow: 4px 5px 0 rgba(41, 43, 74, 0.13);
}

.analysis-panel .product-panel-icon {
  background: var(--purple);
}

.product-panel-icon svg {
  width: 29px;
  height: 29px;
}

.product-panel-top small {
  color: var(--blue-dark);
  font-size: 10px;
  font-weight: 950;
}

.analysis-panel .product-panel-top small {
  color: #7054cf;
}

.product-panel h3 {
  margin: 5px 0 0;
  font-size: 22px;
  font-weight: 950;
  letter-spacing: -0.03em;
  line-height: 1.28;
}

.product-panel > p {
  margin: 18px 0 0;
  color: #62657a;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.7;
}

.product-panel ul {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.product-panel li {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 8px;
  color: #4f536a;
  font-size: 12px;
  font-weight: 780;
  line-height: 1.55;
}

.product-panel li svg {
  width: 18px;
  height: 18px;
  color: var(--mint);
}

.panel-text-link {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  margin-top: 20px;
  color: var(--blue-dark);
  font-size: 12px;
  font-weight: 950;
  text-decoration: none;
}

.panel-text-link svg {
  width: 16px;
  height: 16px;
  transition: transform 160ms ease;
}

.panel-text-link:hover svg {
  transform: translateX(3px);
}

.analysis-output-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
  margin-top: 18px;
}

.analysis-output-grid > div {
  min-width: 0;
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  align-items: center;
  gap: 9px;
  padding: 11px;
  border: 1px solid #d9d3ee;
  border-radius: 13px 11px 14px 12px;
  background: rgba(255, 255, 255, 0.72);
}

.analysis-output-grid > div > svg {
  width: 36px;
  height: 36px;
  padding: 8px;
  color: #fff;
  border-radius: 10px;
  background: var(--purple);
}

.analysis-output-grid strong,
.analysis-output-grid small {
  display: block;
}

.analysis-output-grid strong {
  font-size: 11px;
  font-weight: 950;
}

.analysis-output-grid small {
  margin-top: 2px;
  overflow: hidden;
  color: #717386;
  font-size: 9px;
  font-weight: 720;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.split-about-heading {
  max-width: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(310px, 0.72fr);
  align-items: end;
  gap: 40px;
  text-align: left;
}

.split-about-heading p {
  padding-bottom: 7px;
}

.resource-pack-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 17px;
}

.resource-pack-card {
  position: relative;
  min-height: 282px;
  padding: 24px;
  overflow: hidden;
  border: 2px solid var(--ink);
  border-radius: 22px 17px 25px 18px;
  background: linear-gradient(150deg, #fff, var(--tone-soft));
  box-shadow: 6px 7px 0 color-mix(in srgb, var(--tone) 17%, transparent);
}

.resource-pack-number {
  position: absolute;
  top: 12px;
  right: 16px;
  color: color-mix(in srgb, var(--tone) 20%, transparent);
  font-size: 52px;
  font-weight: 950;
  line-height: 1;
}

.resource-pack-icon {
  width: 55px;
  height: 55px;
  display: grid;
  place-items: center;
  color: #fff;
  border: 2px solid var(--ink);
  border-radius: 16px 13px 18px 14px;
  background: var(--tone);
  box-shadow: 4px 5px 0 rgba(41, 43, 74, 0.14);
}

.resource-pack-icon svg {
  width: 27px;
  height: 27px;
}

.resource-pack-card h3 {
  margin: 22px 0 9px;
  font-size: 21px;
  font-weight: 950;
}

.resource-pack-card p {
  margin: 0;
  color: #62657a;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.7;
}

.resource-pack-card ul {
  display: grid;
  gap: 7px;
  margin: 15px 0 0;
  padding: 0;
  list-style: none;
}

.resource-pack-card li {
  display: grid;
  grid-template-columns: 15px 1fr;
  align-items: start;
  gap: 6px;
  color: #55596f;
  font-size: 11px;
  font-weight: 780;
  line-height: 1.5;
}

.resource-pack-card li svg {
  width: 15px;
  height: 15px;
  color: var(--tone);
}

.resource-pack-card > small {
  display: inline-block;
  margin-top: 17px;
  padding: 6px 9px;
  color: color-mix(in srgb, var(--tone) 76%, #27304b);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  font-size: 10px;
  font-weight: 950;
}

.teaching-route {
  width: min(1320px, 100%);
  margin: 76px auto 0;
  padding: 38px 34px 42px;
  border: 2px solid var(--ink);
  border-radius: 29px 23px 32px 24px;
  background: linear-gradient(135deg, #eef4ff, #fffaf0 55%, #e9faf4);
  box-shadow: 7px 8px 0 rgba(41, 43, 74, 0.08);
}

.route-heading {
  max-width: 780px;
  margin: 0 auto 28px;
  text-align: center;
}

.route-heading > span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--blue-dark);
  font-size: 11px;
  font-weight: 950;
}

.route-heading > span svg {
  width: 16px;
  height: 16px;
}

.route-heading h2 {
  margin: 7px 0 0;
  font-size: clamp(30px, 3.2vw, 42px);
  font-weight: 950;
  letter-spacing: -0.04em;
}

.route-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 32px;
}

.route-steps article {
  position: relative;
  min-height: 165px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 19px 14px;
  border: 2px solid #ded6cb;
  border-radius: 18px 15px 20px 16px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 4px 5px 0 rgba(41, 43, 74, 0.07);
  text-align: center;
}

.route-steps article > svg:not(.route-arrow) {
  width: 42px;
  height: 42px;
  padding: 9px;
  color: #fff;
  border: 2px solid var(--ink);
  border-radius: 12px;
  background: var(--blue);
}

.route-steps article:nth-child(2) > svg:not(.route-arrow) {
  color: var(--ink);
  background: var(--yellow);
}

.route-steps article:nth-child(3) > svg:not(.route-arrow) {
  background: var(--orange);
}

.route-steps article:nth-child(4) > svg:not(.route-arrow) {
  background: var(--mint);
}

.route-index {
  position: absolute;
  z-index: 2;
  top: -10px;
  left: -8px;
  width: 29px;
  height: 29px;
  display: grid;
  place-items: center;
  color: var(--ink);
  border: 2px solid var(--ink);
  border-radius: 9px;
  background: var(--yellow);
  font-size: 10px;
  font-weight: 950;
  transform: rotate(-4deg);
}

.route-steps strong {
  margin-top: 12px;
  font-size: 15px;
  font-weight: 950;
}

.route-steps small {
  margin-top: 5px;
  color: #6f7285;
  font-size: 10px;
  font-weight: 720;
  line-height: 1.5;
}

.route-arrow {
  position: absolute;
  top: 68px;
  right: -28px;
  width: 21px;
  height: 21px;
  color: #a3a2b0;
}

.about-principle-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 15px;
}

.about-principle-grid article {
  min-height: 142px;
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  align-items: start;
  gap: 14px;
  padding: 20px;
  border: 2px solid #dcd3c8;
  border-radius: 19px 15px 21px 16px;
  background: rgba(255, 255, 255, 0.84);
  box-shadow: 4px 5px 0 rgba(41, 43, 74, 0.07);
}

.about-principle-grid article > svg {
  width: 52px;
  height: 52px;
  padding: 12px;
  color: #fff;
  border: 2px solid var(--ink);
  border-radius: 14px;
  background: var(--blue);
}

.about-principle-grid article:nth-child(2) > svg {
  color: var(--ink);
  background: var(--yellow);
}

.about-principle-grid article:nth-child(3) > svg {
  background: var(--mint);
}

.about-principle-grid article:nth-child(4) > svg {
  background: var(--purple);
}

.about-principle-grid strong {
  display: block;
  font-size: 15px;
  font-weight: 950;
}

.about-principle-grid p {
  margin: 7px 0 0;
  color: #66697d;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.65;
}

.about-faq {
  width: min(1000px, 100%);
}

.about-faq-list {
  display: grid;
  gap: 11px;
}

.about-faq-list details {
  overflow: hidden;
  border: 2px solid #dcd3c8;
  border-radius: 16px 13px 18px 14px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 3px 4px 0 rgba(41, 43, 74, 0.06);
}

.about-faq-list summary {
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 18px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 950;
  list-style: none;
}

.about-faq-list summary::-webkit-details-marker {
  display: none;
}

.about-faq-list summary svg {
  flex: none;
  width: 19px;
  height: 19px;
  color: var(--blue-dark);
  transition: transform 160ms ease;
}

.about-faq-list details[open] summary svg {
  transform: rotate(90deg);
}

.about-faq-list details[open] summary {
  color: var(--blue-dark);
  border-bottom: 1px dashed #d8d0c5;
}

.about-faq-list details p {
  margin: 0;
  padding: 14px 18px 18px;
  color: #65687c;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.7;
}

.about-final-cta {
  position: relative;
  width: min(1240px, 100%);
  min-height: 205px;
  display: grid;
  grid-template-columns: 215px minmax(0, 1fr);
  align-items: center;
  gap: 26px;
  margin: 76px auto 0;
  padding: 31px 31px 31px 25px;
  overflow: hidden;
  color: #fff;
  border: 3px solid var(--ink);
  border-radius: 27px 22px 30px 23px;
  background:
    radial-gradient(circle at 38px 38px, rgba(255, 255, 255, 0.08) 0 3px, transparent 4px) 0 0 / 49px 49px,
    linear-gradient(120deg, #486fcf, #6c58cf);
  box-shadow: 8px 9px 0 var(--yellow);
}

.final-mascot {
  position: absolute;
  left: -4px;
  bottom: -109px;
  width: 230px;
}

.final-mascot img {
  display: block;
  width: 100%;
  height: auto;
  filter: drop-shadow(0 12px 10px rgba(19, 18, 54, 0.25));
}

.final-cta-copy {
  grid-column: 2;
}

.final-cta-copy > span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: #c7ffe9;
  font-size: 10px;
  font-weight: 950;
}

.final-cta-copy > span svg {
  width: 15px;
  height: 15px;
}

.final-cta-copy h2 {
  margin: 7px 0 7px;
  font-size: clamp(25px, 2.8vw, 35px);
  font-weight: 950;
  letter-spacing: -0.035em;
}

.final-cta-copy p {
  margin: 0;
  color: rgba(255, 255, 255, 0.77);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.65;
}

.about-footer {
  width: min(1240px, 100%);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin: 24px auto 0;
  padding: 0 4px;
  color: #838396;
  font-size: 10px;
  font-weight: 800;
}

[data-bs-theme="dark"] .dianku-about-main {
  background:
    radial-gradient(circle at 21px 21px, rgba(110, 150, 245, 0.08) 0 2px, transparent 3px) 0 0 / 42px 42px,
    linear-gradient(180deg, #171923 0%, #191c27 54%, #171e27 100%);
}

[data-bs-theme="dark"] .dianku-about-page {
  --paper: #20242e;
  --ink: #f0f3f9;
  --muted-ink: #b6bdcb;
  --line: rgba(255, 255, 255, 0.12);
  --blue-soft: rgba(85, 136, 245, 0.16);
  --yellow-soft: rgba(255, 201, 79, 0.15);
  --mint-soft: rgba(69, 202, 164, 0.14);
  --purple-soft: rgba(137, 107, 232, 0.16);
  --orange-soft: rgba(255, 151, 47, 0.14);
}

[data-bs-theme="dark"] .about-new-hero {
  background:
    radial-gradient(circle at 72px 72px, rgba(255, 255, 255, 0.05) 0 4px, transparent 5px) 0 0 / 72px 72px,
    linear-gradient(135deg, #242936 0%, #222938 51%, #1e3331 100%);
}

[data-bs-theme="dark"] .about-new-hero-copy > p,
[data-bs-theme="dark"] .about-section-heading p,
[data-bs-theme="dark"] .about-position-strip > p,
[data-bs-theme="dark"] .course-feature-card p,
[data-bs-theme="dark"] .teacher-answer-card p,
[data-bs-theme="dark"] .product-panel > p,
[data-bs-theme="dark"] .resource-pack-card p,
[data-bs-theme="dark"] .about-principle-grid p,
[data-bs-theme="dark"] .about-faq-list details p,
[data-bs-theme="dark"] .route-steps small {
  color: #b6bdcb;
}

[data-bs-theme="dark"] .about-stage-equation,
[data-bs-theme="dark"] .about-stage-card,
[data-bs-theme="dark"] .about-position-strip,
[data-bs-theme="dark"] .course-feature-card,
[data-bs-theme="dark"] .teacher-answer-card,
[data-bs-theme="dark"] .product-panel,
[data-bs-theme="dark"] .resource-pack-card,
[data-bs-theme="dark"] .route-steps article,
[data-bs-theme="dark"] .about-principle-grid article,
[data-bs-theme="dark"] .about-faq-list details {
  border-color: rgba(255, 255, 255, 0.14);
  background: #20242e;
}

[data-bs-theme="dark"] .course-feature-card,
[data-bs-theme="dark"] .teacher-answer-card,
[data-bs-theme="dark"] .resource-pack-card,
[data-bs-theme="dark"] .resource-panel,
[data-bs-theme="dark"] .analysis-panel {
  background: linear-gradient(145deg, #20242e, #252b37);
}

[data-bs-theme="dark"] .teaching-route {
  border-color: rgba(255, 255, 255, 0.14);
  background: linear-gradient(135deg, #202735, #2a2730 55%, #1e312d);
}

[data-bs-theme="dark"] .about-proof-chips span,
[data-bs-theme="dark"] .analysis-output-grid > div,
[data-bs-theme="dark"] .resource-pack-card > small {
  border-color: rgba(255, 255, 255, 0.13);
  background: rgba(255, 255, 255, 0.06);
}

[data-bs-theme="dark"] .about-proof-chips span,
[data-bs-theme="dark"] .analysis-output-grid small,
[data-bs-theme="dark"] .product-panel li,
[data-bs-theme="dark"] .resource-pack-card li,
[data-bs-theme="dark"] .course-feature-note {
  color: #c2c8d5;
}

[data-bs-theme="dark"] .about-hero-actions .about-action-secondary {
  color: #b9ccff;
  background: #20242e;
}

@media (max-width: 1180px) {
  .about-new-hero {
    grid-template-columns: minmax(0, 1fr) 365px;
    padding-inline: 42px;
  }

  .about-mascot-wrap {
    right: -82px;
  }

  .about-stage-equation {
    left: -18px;
  }

  .stage-analysis {
    right: -34px;
  }

  .about-position-strip {
    grid-template-columns: minmax(230px, 0.7fr) minmax(0, 1.3fr);
  }

  .position-strip-tags {
    grid-column: 1 / -1;
    flex-direction: row;
    padding-top: 12px;
    border-top: 1px dashed #d7cdc1;
  }

  .about-position-strip > p {
    border-right: 0;
  }
}

@media (max-width: 980px) {
  .about-new-hero {
    min-height: 0;
    grid-template-columns: 1fr;
    padding-bottom: 380px;
  }

  .about-hero-stage {
    position: absolute;
    right: 30px;
    bottom: 0;
    width: 485px;
    min-height: 350px;
  }

  .about-stage-equation {
    top: 25px;
    left: -40px;
  }

  .stage-resource {
    top: 156px;
    left: -52px;
  }

  .about-product-panels {
    grid-template-columns: 1fr;
  }

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

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

  .resource-pack-grid {
    grid-template-columns: 1fr;
  }

  .resource-pack-card {
    min-height: 235px;
  }

  .route-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    row-gap: 25px;
  }

  .route-steps article:nth-child(2) .route-arrow {
    display: none;
  }

  .about-final-cta {
    grid-template-columns: 190px minmax(0, 1fr);
    padding-right: 25px;
  }
}

@media (max-width: 760px) {
  .dianku-about-page {
    width: min(100% - 20px, 1280px);
    padding-top: 10px;
  }

  .about-new-hero {
    padding: 33px 24px 355px;
    border-radius: 24px 20px 26px 21px;
  }

  .about-new-hero h1 {
    font-size: clamp(30px, 6vw, 36px);
  }

  .about-new-hero-copy > p {
    font-size: 14px;
  }

  .about-hero-stage {
    right: 0;
    width: 430px;
    min-height: 330px;
  }

  .about-mascot-wrap {
    right: -35px;
    width: 320px;
  }

  .about-stage-equation {
    top: 18px;
    left: 8px;
    width: 295px;
  }

  .about-stage-equation strong {
    font-size: 14px;
  }

  .stage-resource {
    top: 148px;
    left: 5px;
  }

  .stage-analysis {
    right: 5px;
    bottom: 27px;
  }

  .about-position-strip {
    width: calc(100% - 20px);
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 18px;
  }

  .about-position-strip > p {
    padding: 14px 0;
    border-top: 1px dashed #d7cdc1;
    border-bottom: 1px dashed #d7cdc1;
    border-left: 0;
  }

  .position-strip-tags {
    grid-column: auto;
    padding-top: 0;
    border-top: 0;
  }

  .course-feature-grid,
  .teacher-answer-grid,
  .about-principle-grid {
    grid-template-columns: 1fr;
  }

  .about-products {
    padding: 33px 20px 36px;
  }

  .split-about-heading {
    grid-template-columns: 1fr;
    gap: 8px;
    text-align: center;
  }

  .analysis-output-grid {
    grid-template-columns: 1fr;
  }

  .analysis-output-grid small {
    white-space: normal;
  }

  .teaching-route {
    padding-inline: 20px;
  }

  .about-final-cta {
    grid-template-columns: 1fr;
    padding: 28px 22px 174px;
    text-align: center;
  }

  .final-mascot {
    left: 50%;
    bottom: -108px;
    transform: translateX(-50%);
  }

  .final-cta-copy {
    grid-column: 1;
  }
}

@media (max-width: 520px) {
  .about-new-hero {
    padding: 27px 17px 325px;
  }

  .about-kicker {
    font-size: 10px;
  }

  .about-new-hero h1 {
    margin-top: 15px;
    font-size: 30px;
  }

  .about-hero-actions {
    display: grid;
  }

  .about-hero-actions .about-action {
    width: 100%;
  }

  .about-proof-chips {
    gap: 6px;
  }

  .about-proof-chips span {
    padding: 6px 8px;
    font-size: 9px;
  }

  .about-hero-stage {
    right: -15px;
    width: 350px;
    min-height: 300px;
  }

  .about-mascot-wrap {
    right: -27px;
    width: 280px;
  }

  .about-stage-equation {
    top: 14px;
    left: 8px;
    width: 265px;
    padding: 13px;
  }

  .about-stage-equation strong {
    gap: 5px;
    font-size: 12px;
  }

  .about-stage-card {
    min-width: 172px;
    padding: 8px 9px;
  }

  .about-stage-card > svg {
    width: 33px;
    height: 33px;
  }

  .about-stage-card strong {
    font-size: 10px;
  }

  .stage-resource {
    top: 132px;
    left: 8px;
  }

  .stage-analysis {
    right: 2px;
    bottom: 24px;
  }

  .about-section,
  .about-products,
  .teaching-route,
  .about-final-cta {
    margin-top: 56px;
  }

  .about-section-heading h2,
  .route-heading h2 {
    font-size: 29px;
  }

  .teacher-answer-card {
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 12px;
    padding: 17px;
  }

  .course-feature-card {
    min-height: 0;
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 12px;
    padding: 17px;
  }

  .course-feature-icon {
    width: 46px;
    height: 46px;
  }

  .teacher-answer-icon {
    width: 48px;
    height: 48px;
  }

  .teacher-answer-card h3 {
    font-size: 16px;
  }

  .product-panel {
    padding: 19px;
  }

  .product-panel-top {
    grid-template-columns: 50px minmax(0, 1fr);
    gap: 11px;
  }

  .product-panel-icon {
    width: 50px;
    height: 50px;
  }

  .product-panel h3 {
    font-size: 18px;
  }

  .resource-pack-card {
    min-height: 0;
    padding: 20px;
  }

  .route-steps {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .route-arrow {
    display: none;
  }

  .about-principle-grid article {
    grid-template-columns: 45px minmax(0, 1fr);
    padding: 16px;
  }

  .about-principle-grid article > svg {
    width: 45px;
    height: 45px;
    padding: 10px;
  }

  .about-footer {
    flex-direction: column;
    align-items: center;
    gap: 5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .dianku-about-page *,
  .dianku-about-page *::before,
  .dianku-about-page *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}