:root {
  color-scheme: light;
  --ink: #10214a;
  --muted: #5b6883;
  --line: #d7e0ff;
  --paper: #ffffff;
  --wash: #f4f7fb;
  --blue: #1f63ff;
  --cyan: #00a8b8;
  --green: #4f9f5b;
  --violet: #7147e8;
  --shadow: 0 18px 50px rgba(20, 44, 90, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
  overflow-x: hidden;
}

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

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  right: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
  padding: 14px clamp(20px, 4vw, 64px);
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(215, 224, 255, 0.76);
  backdrop-filter: blur(18px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: block;
  width: 50px;
  height: 50px;
  overflow: hidden;
  border-radius: 10px;
  background: #fff;
  box-shadow: 0 8px 20px rgba(20, 44, 90, 0.08);
}

.brand-mark img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 19px;
  line-height: 1.15;
}

.brand small {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.main-nav a {
  padding: 8px 12px;
  border-radius: 8px;
  color: #26365f;
  font-size: 15px;
}

.main-nav a:hover {
  background: #eef4ff;
}

.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 118px clamp(20px, 5vw, 76px) 52px;
}

.hero-image,
.hero-shade {
  position: absolute;
  inset: 0;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(8, 20, 43, 0.88) 0%, rgba(8, 20, 43, 0.72) 34%, rgba(8, 20, 43, 0.22) 74%, rgba(8, 20, 43, 0.08) 100%),
    linear-gradient(0deg, rgba(8, 20, 43, 0.34), rgba(8, 20, 43, 0));
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
  color: #fff;
}

.eyebrow,
.section-kicker {
  margin: 0 0 12px;
  color: var(--cyan);
  font-weight: 800;
  letter-spacing: 0;
}

.hero h1 {
  margin: 0;
  font-size: clamp(54px, 8vw, 104px);
  line-height: 0.95;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 620px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.92);
  font-size: clamp(19px, 2.3vw, 27px);
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 800;
}

.button.primary {
  color: #fff;
  background: var(--blue);
  box-shadow: 0 16px 32px rgba(31, 99, 255, 0.25);
}

.button.secondary {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.68);
  background: rgba(255, 255, 255, 0.13);
}

.button.full {
  width: 100%;
}

.quick-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 560px;
  margin: 44px 0 0;
}

.quick-facts div {
  padding: 15px 16px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(12px);
}

.quick-facts dt {
  color: rgba(255, 255, 255, 0.68);
  font-size: 13px;
}

.quick-facts dd {
  margin: 2px 0 0;
  color: #fff;
  font-weight: 800;
}

.section,
.section-band {
  padding: 82px clamp(20px, 5vw, 76px);
}

.section-band {
  background: var(--wash);
}

.section-inner {
  max-width: 1180px;
  margin: 0 auto;
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(28px, 5vw, 78px);
  align-items: start;
}

h2 {
  margin: 0;
  color: #13245b;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.15;
  letter-spacing: 0;
}

h3 {
  margin: 0;
  color: #13245b;
  font-size: 22px;
  line-height: 1.25;
}

p {
  color: var(--muted);
}

.text-block p {
  margin: 0 0 16px;
  font-size: 18px;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading p:last-child {
  margin-bottom: 0;
  font-size: 18px;
}

.compact-heading {
  margin-top: 18px;
  margin-bottom: 22px;
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 34px;
}

.course-card {
  min-height: 260px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 12px 28px rgba(20, 44, 90, 0.07);
}

.course-icon {
  display: grid;
  width: 48px;
  height: 48px;
  margin-bottom: 22px;
  place-items: center;
  border-radius: 8px;
  color: #fff;
  background: var(--green);
  font-weight: 900;
}

.course-card:nth-child(2) .course-icon {
  background: var(--blue);
}

.course-card:nth-child(3) .course-icon {
  background: var(--violet);
}

.course-card p {
  margin-bottom: 0;
}

.gallery-block {
  margin-top: 22px;
}

.carousel {
  position: relative;
}

.carousel-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #eef4ff;
  box-shadow: var(--shadow);
}

.carousel-slide {
  display: none;
  margin: 0;
}

.carousel-slide.is-active {
  display: block;
}

.carousel-slide img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  object-position: center top;
  background: #eef4ff;
}

.carousel-slide figcaption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 22px;
  background: #fff;
}

.carousel-slide strong {
  color: #13245b;
  font-size: 20px;
}

.carousel-slide span {
  color: var(--muted);
  text-align: right;
}

.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-top: 18px;
}

.carousel-button {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #13245b;
  background: #fff;
  cursor: pointer;
  font-size: 28px;
  line-height: 1;
}

.carousel-button:hover {
  background: #eef4ff;
}

.carousel-dots {
  display: flex;
  gap: 8px;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: #c9d7ff;
  cursor: pointer;
}

.carousel-dot.is-active {
  width: 28px;
  background: var(--blue);
}

.system-section {
  background: #eef4ff;
}

.system-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.system-card {
  min-height: 210px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 10px 24px rgba(20, 44, 90, 0.06);
}

.system-card h3 {
  margin-bottom: 12px;
}

.system-card p {
  margin: 0 0 18px;
}

.system-card span {
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  color: #1f63ff;
  background: #edf3ff;
  font-weight: 800;
}

.project-section {
  background: #fff;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.project-grid article {
  min-height: 116px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(135deg, #ffffff 0%, #f7fbff 100%);
}

.project-grid strong,
.project-grid span {
  display: block;
}

.project-grid strong {
  color: #13245b;
  font-size: 20px;
}

.project-grid span {
  margin-top: 8px;
  color: var(--muted);
}

.proof-section p {
  font-size: 18px;
}

.proof-wall {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.certificate-card {
  min-height: 220px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 22px;
  border: 1px solid #e8d8ba;
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(255, 250, 240, 0.92)),
    repeating-linear-gradient(45deg, rgba(198, 152, 78, 0.08) 0 8px, rgba(255, 255, 255, 0.08) 8px 16px);
  box-shadow: 0 14px 34px rgba(120, 92, 46, 0.12);
}

.certificate-card span {
  display: inline-flex;
  width: fit-content;
  min-height: 36px;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  color: #7f5520;
  background: #fff2d8;
  font-weight: 900;
}

.certificate-card strong {
  display: block;
  margin-top: 24px;
  color: #13245b;
  font-size: 21px;
  line-height: 1.25;
}

.certificate-card p {
  margin: 16px 0 0;
  font-size: 15px;
}

.program {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: center;
}

.program-copy p {
  font-size: 18px;
}

.program-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.program-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.program-list strong {
  flex: 0 0 112px;
  color: #13245b;
}

.program-list span {
  color: var(--muted);
  text-align: right;
}

.trial-section {
  background: #fff;
}

.contact-panel,
.lead-form {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.contact-panel {
  padding: 26px;
}

.contact-panel dl {
  display: grid;
  gap: 16px;
  margin: 0 0 24px;
}

.contact-panel div {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 12px;
  align-items: start;
}

.contact-panel dt {
  color: var(--muted);
}

.contact-panel dd {
  margin: 0;
  color: #13245b;
  font-weight: 800;
}

.lead-form-section {
  padding-top: 0;
}

.lead-form {
  padding: clamp(22px, 4vw, 34px);
}

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

.form-field {
  display: grid;
  gap: 8px;
}

.form-field.wide {
  grid-column: 1 / -1;
}

.form-field.honeypot {
  position: absolute;
  left: -10000px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-field label {
  color: #13245b;
  font-weight: 800;
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  min-height: 48px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: #13245b;
  background: #f8faff;
  font: inherit;
  font-size: 16px;
}

.form-field textarea {
  min-height: 108px;
  resize: vertical;
}

.form-note {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.form-submit-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 22px;
}

.form-submit-row .button {
  cursor: pointer;
}

.form-submit-row .button:disabled {
  cursor: not-allowed;
  opacity: 0.64;
}

.form-status {
  min-height: 24px;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.form-status[data-type="success"] {
  color: #1c6b37;
}

.form-status[data-type="error"] {
  color: #b42318;
}

.form-status[data-type="pending"] {
  color: #1f63ff;
}

.compare-section {
  background: #f4f7fb;
}

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

.compare-card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 12px 28px rgba(20, 44, 90, 0.07);
}

.compare-card.featured {
  border-color: rgba(31, 99, 255, 0.34);
  background: linear-gradient(135deg, #ffffff 0%, #eef5ff 100%);
}

.compare-card p {
  margin: 12px 0 18px;
}

.compare-card ul {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

.compare-card li::marker {
  color: var(--blue);
}

.compare-note {
  display: flex;
  gap: 12px;
  margin-top: 18px;
  padding: 18px 20px;
  border: 1px solid rgba(79, 159, 91, 0.28);
  border-radius: 8px;
  background: #f3fbf5;
}

.compare-note strong {
  flex: 0 0 auto;
  color: #1c6b37;
}

.compare-note span {
  color: #35506a;
}

.faq-list {
  display: grid;
  gap: 12px;
}

details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

summary {
  cursor: pointer;
  padding: 20px 22px;
  color: #13245b;
  font-size: 18px;
  font-weight: 800;
}

details p {
  margin: 0;
  padding: 0 22px 22px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 34px clamp(20px, 5vw, 76px);
  color: #fff;
  background: #101b3f;
}

.site-footer p {
  margin: 4px 0;
  color: rgba(255, 255, 255, 0.76);
}

.mobile-cta {
  display: none;
}

html[data-device="desktop"] .mobile-cta {
  display: none;
}

@media (max-width: 920px) {
  .site-header {
    position: sticky;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    min-height: 0;
    padding: 12px 16px 10px;
  }

  .main-nav {
    width: 100%;
    justify-content: flex-start;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 2px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

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

  .main-nav a {
    flex: 0 0 auto;
    min-height: 38px;
    display: inline-flex;
    align-items: center;
  }

  .hero {
    min-height: auto;
    padding-top: 64px;
    padding-bottom: 44px;
  }

  .hero-shade {
    background: linear-gradient(90deg, rgba(8, 20, 43, 0.9), rgba(8, 20, 43, 0.62));
  }

  .section,
  .section-band {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .two-column,
  .program {
    grid-template-columns: 1fr;
  }

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

  .carousel-slide img {
    aspect-ratio: 16 / 10;
    object-fit: contain;
    background: #eef4ff;
  }

  .carousel-slide figcaption {
    display: block;
  }

  .carousel-slide span {
    display: block;
    margin-top: 6px;
    text-align: left;
  }

  .proof-wall {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  body {
    padding-bottom: calc(76px + env(safe-area-inset-bottom));
  }

  .brand-mark {
    width: 44px;
    height: 44px;
    border-radius: 8px;
  }

  .brand strong {
    font-size: 18px;
  }

  .brand small {
    font-size: 11px;
  }

  .main-nav a {
    padding: 7px 10px;
    font-size: 14px;
    background: #f4f7ff;
  }

  .hero {
    padding-right: 18px;
    padding-left: 18px;
    min-height: calc(100svh - 112px);
    align-items: flex-end;
  }

  .hero-image {
    object-position: 58% center;
  }

  .hero-shade {
    background:
      linear-gradient(0deg, rgba(8, 20, 43, 0.9) 0%, rgba(8, 20, 43, 0.72) 48%, rgba(8, 20, 43, 0.18) 100%),
      linear-gradient(90deg, rgba(8, 20, 43, 0.32), rgba(8, 20, 43, 0.08));
  }

  .eyebrow,
  .section-kicker {
    font-size: 14px;
  }

  .hero h1 {
    font-size: 54px;
  }

  .hero-copy {
    margin-top: 18px;
    font-size: 17px;
    line-height: 1.55;
  }

  .hero-actions {
    display: none;
  }

  .button {
    min-height: 46px;
    padding: 10px 14px;
    text-align: center;
  }

  .quick-facts,
  .course-grid,
  .system-grid,
  .project-grid,
  .compare-grid,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .quick-facts {
    gap: 8px;
    margin-top: 24px;
  }

  .quick-facts div {
    padding: 12px;
  }

  .section,
  .section-band {
    padding: 52px 16px;
  }

  h2 {
    font-size: 30px;
    line-height: 1.18;
  }

  h3 {
    font-size: 20px;
  }

  .section-heading {
    margin-bottom: 24px;
  }

  .section-heading p:last-child,
  .text-block p,
  .program-copy p,
  .proof-section p {
    font-size: 16px;
  }

  .course-card,
  .system-card,
  .project-grid article,
  .compare-card,
  .contact-panel,
  .lead-form {
    padding: 18px;
  }

  .compare-note {
    display: block;
    padding: 16px;
  }

  .compare-note span {
    display: block;
    margin-top: 6px;
  }

  .form-submit-row {
    display: grid;
    gap: 10px;
  }

  .form-submit-row .button {
    width: 100%;
  }

  .course-card,
  .system-card {
    min-height: 0;
  }

  .carousel-frame {
    border-radius: 8px;
  }

  .carousel-slide img {
    aspect-ratio: 4 / 3;
    object-fit: contain;
  }

  .carousel-slide figcaption {
    padding: 14px 16px;
  }

  .carousel-slide strong {
    font-size: 18px;
  }

  .carousel-slide span {
    font-size: 14px;
    line-height: 1.45;
  }

  .carousel-button {
    width: 42px;
    height: 42px;
  }

  .carousel-dot {
    width: 9px;
    height: 9px;
  }

  .carousel-dot.is-active {
    width: 22px;
  }

  .program-list li {
    display: block;
  }

  .program-list span {
    display: block;
    margin-top: 4px;
    text-align: left;
  }

  .site-footer {
    display: block;
    padding-bottom: 30px;
  }

  .carousel-controls {
    gap: 12px;
  }

  .mobile-cta {
    position: fixed;
    z-index: 30;
    right: 0;
    bottom: 0;
    left: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
    background: rgba(255, 255, 255, 0.92);
    border-top: 1px solid rgba(215, 224, 255, 0.9);
    box-shadow: 0 -12px 30px rgba(20, 44, 90, 0.12);
    backdrop-filter: blur(16px);
  }

  html[data-device="desktop"] .mobile-cta {
    display: none;
  }

  html[data-device="mobile"] .mobile-cta {
    display: grid;
  }

  .mobile-cta-link {
    display: inline-flex;
    min-height: 48px;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-weight: 900;
  }

  .mobile-cta-link.ghost {
    color: #13245b;
    border: 1px solid var(--line);
    background: #fff;
  }

  .mobile-cta-link.solid {
    color: #fff;
    background: var(--blue);
  }
}

@media (max-width: 380px) {
  .hero h1 {
    font-size: 46px;
  }

  .hero-copy {
    font-size: 16px;
  }

  .quick-facts dd {
    font-size: 14px;
  }
}