:root {
  --bg: #eef3ff;
  --surface: rgba(255, 255, 255, 0.92);
  --surface-strong: #ffffff;
  --primary: #3566e8;
  --primary-dark: #2145a7;
  --primary-soft: rgba(53, 102, 232, 0.1);
  --text: #13213c;
  --muted: #5d6880;
  --border: rgba(19, 33, 60, 0.12);
  --danger: #c84545;
  --success: #0a7c53;
  --shadow: 0 24px 60px rgba(53, 102, 232, 0.12);
  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --container: 1220px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "DM Sans", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(53, 102, 232, 0.18), transparent 32%),
    radial-gradient(circle at right center, rgba(127, 160, 255, 0.18), transparent 26%),
    linear-gradient(180deg, #fafcff 0%, var(--bg) 60%, #edf2ff 100%);
}

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

img {
  display: block;
  max-width: 100%;
}

input,
textarea,
select,
button {
  font: inherit;
}

.page-shell {
  width: min(calc(100% - 24px), var(--container));
  margin: 0 auto;
  padding: 18px 0 42px;
  overflow-x: clip;
}

.registration-shell {
  display: grid;
  gap: 20px;
}

.page-header,
.intro-card,
.form-panel {
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.85);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  border-radius: 999px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
  flex: 1 1 auto;
}

.brand-logo {
  width: 54px;
  height: 54px;
  border-radius: 50%;
}

.brand-copy {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.brand-name {
  font-size: 1.55rem;
  font-weight: 700;
  overflow-wrap: anywhere;
}

.brand-tag {
  color: var(--muted);
  font-size: 0.94rem;
  overflow-wrap: anywhere;
}

.header-note {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
  flex: 0 0 auto;
}

.chip {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 14px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--primary), #4a77ee);
  color: #fff;
  font-weight: 700;
}

.chip-soft {
  background: rgba(255, 255, 255, 0.72);
  color: var(--primary-dark);
  border: 1px solid rgba(53, 102, 232, 0.14);
}

.intro-card {
  display: grid;
  gap: 22px;
  padding: 30px;
  border-radius: var(--radius-xl);
}

.eyebrow {
  margin: 0 0 10px;
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  font-weight: 700;
}

.intro-card h1,
.section-heading h2 {
  margin: 0;
  font-family: "Instrument Serif", serif;
  font-weight: 400;
  letter-spacing: -0.03em;
}

.intro-card h1 {
  font-size: clamp(2.8rem, 5.5vw, 4.6rem);
  line-height: 0.94;
}

.intro-card p,
.section-heading p,
.payment-helper,
.form-status {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.intro-copy {
  display: grid;
  gap: 12px;
  max-width: 760px;
  min-width: 0;
}

.intro-card p {
  max-width: 56ch;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-meta span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(53, 102, 232, 0.08);
  border: 1px solid rgba(53, 102, 232, 0.12);
  color: var(--primary-dark);
  font-weight: 600;
  text-align: center;
}

.partner-strip {
  display: grid;
  gap: 12px;
  padding: 18px 20px;
  border-radius: 20px;
  background: linear-gradient(135deg, #22252f, #343848);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.partner-label {
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.92rem;
  font-weight: 600;
}

.partner-logos {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px 22px;
  min-width: 0;
}

.partner-logo {
  display: block;
  width: auto;
  max-width: 100%;
  object-fit: contain;
  filter: drop-shadow(0 8px 18px rgba(0, 0, 0, 0.24));
}

.partner-logo-adm {
  height: clamp(24px, 3vw, 34px);
}

.partner-logo-yi {
  height: clamp(34px, 4vw, 46px);
}

.partner-logo-edu {
  height: clamp(48px, 6vw, 68px);
}

.payment-card,
.bank-card {
  border-radius: var(--radius-lg);
}

.content-grid {
  display: block;
}

.form-panel {
  border-radius: var(--radius-xl);
  padding: 28px;
  min-width: 0;
}

.poster-section {
  display: grid;
  gap: 18px;
  margin-top: 20px;
}

.poster-copy {
  display: grid;
  gap: 10px;
  max-width: 640px;
}

.poster-copy h2 {
  margin: 0;
  font-family: "Instrument Serif", serif;
  font-weight: 400;
  letter-spacing: -0.03em;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 0.96;
}

.poster-copy p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.poster-frame {
  padding: 14px;
  border-radius: var(--radius-xl);
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.85);
  box-shadow: var(--shadow);
}

.poster-image {
  width: 100%;
  height: auto;
  border-radius: 22px;
  object-fit: cover;
}

.section-heading {
  display: grid;
  gap: 8px;
  margin-bottom: 20px;
}

.section-heading h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 0.95;
}

.section-heading-compact h2 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
}

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

.field,
.fieldset {
  display: grid;
  gap: 8px;
  min-width: 0;
}

.field span,
.fieldset legend {
  font-weight: 700;
  font-size: 0.96rem;
}

.field em,
.fieldset em {
  color: var(--danger);
  font-style: normal;
}

.field input,
.field textarea,
.field select {
  width: 100%;
  padding: 15px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface-strong);
  color: var(--text);
  font-size: 16px;
  outline: none;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.field input:focus,
.field textarea:focus,
.field select:focus {
  border-color: rgba(53, 102, 232, 0.56);
  box-shadow: 0 0 0 5px rgba(53, 102, 232, 0.12);
}

.field textarea {
  min-height: 120px;
  resize: vertical;
}

.fieldset {
  min-height: 100%;
  padding: 16px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.76);
  border-radius: var(--radius-md);
}

.fieldset legend {
  padding: 0 8px;
}

.choice-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.choice-row label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 14px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary-dark);
}

.choice-row input {
  accent-color: var(--primary);
}

.field-full {
  grid-column: 1 / -1;
}

.payment-box {
  margin-top: 26px;
  padding: 24px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(234, 240, 255, 0.9), rgba(255, 255, 255, 0.96));
  border: 1px solid rgba(53, 102, 232, 0.14);
}

.payment-primary {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 16px;
  align-items: stretch;
  margin-bottom: 16px;
}

.payment-primary-copy {
  display: grid;
  gap: 12px;
  min-width: 0;
}

.payment-card,
.bank-card,
.qr-panel {
  padding: 18px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(53, 102, 232, 0.12);
}

.payment-card span,
.qr-panel p,
.bank-grid p {
  color: var(--muted);
}

.payment-card strong {
  display: block;
  margin-top: 6px;
  font-size: 1.08rem;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.payment-actions {
  display: grid;
  align-content: start;
  gap: 12px;
  min-width: 0;
}

.payment-extras {
  display: grid;
  gap: 12px;
  margin-bottom: 18px;
}

.payment-detail-card {
  border-radius: var(--radius-md);
  border: 1px solid rgba(53, 102, 232, 0.14);
  background: rgba(255, 255, 255, 0.84);
  overflow: hidden;
}

.payment-detail-card summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 18px;
  font-weight: 700;
  color: var(--primary-dark);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.payment-detail-card summary::-webkit-details-marker {
  display: none;
}

.payment-detail-card summary::after {
  content: "+";
  font-size: 1.35rem;
  line-height: 1;
}

.payment-detail-card[open] summary::after {
  content: "-";
}

.payment-detail-body {
  padding: 0 18px 18px;
  border-top: 1px solid rgba(53, 102, 232, 0.12);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 0 22px;
  border: 0;
  border-radius: 999px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease;
  text-align: center;
  white-space: normal;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: linear-gradient(135deg, var(--primary), #4c77f0);
  color: #fff;
  box-shadow: 0 18px 28px rgba(53, 102, 232, 0.24);
}

.qr-panel {
  display: grid;
  justify-items: center;
  align-content: start;
  gap: 10px;
  text-align: center;
  min-width: 0;
}

#qrImage {
  width: 100%;
  max-width: 220px;
  aspect-ratio: 1;
  object-fit: contain;
  border-radius: 18px;
}

.bank-card h3 {
  margin: 0 0 12px;
  font-size: 1.08rem;
}

.bank-card-embedded {
  padding: 18px 0 0;
  background: transparent;
  border: 0;
}

.bank-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 16px;
}

.bank-grid p {
  margin: 0;
  overflow-wrap: anywhere;
}

.form-actions {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.consent {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.78);
}

.consent input {
  margin-top: 3px;
  accent-color: var(--primary);
}

.form-status {
  min-height: 26px;
  font-weight: 500;
}

.form-status.success {
  color: var(--success);
}

.form-status.error {
  color: var(--danger);
}

.success-overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(12, 19, 37, 0.55);
  backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 220ms ease, visibility 220ms ease;
  z-index: 50;
}

.success-overlay.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.success-card {
  width: min(100%, 520px);
  max-height: min(88vh, 720px);
  overflow: auto;
  padding: 28px;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 28px 70px rgba(19, 33, 60, 0.24);
  text-align: center;
  transform: translateY(24px) scale(0.96);
  transition: transform 260ms ease;
}

.success-overlay.is-visible .success-card {
  transform: translateY(0) scale(1);
}

.success-badge {
  display: grid;
  place-items: center;
  width: 88px;
  height: 88px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(53, 102, 232, 0.18), rgba(53, 102, 232, 0.04));
  position: relative;
  overflow: hidden;
}

.success-badge::before,
.success-badge::after {
  content: "";
  position: absolute;
  inset: 10px;
  border-radius: 50%;
  border: 1px solid rgba(53, 102, 232, 0.18);
}

.success-badge::after {
  inset: 0;
  border-color: rgba(53, 102, 232, 0.12);
  animation: pulse-ring 1.8s ease infinite;
}

.success-badge span {
  width: 26px;
  height: 14px;
  border-left: 4px solid var(--primary);
  border-bottom: 4px solid var(--primary);
  transform: rotate(-45deg);
  margin-top: -4px;
  animation: check-pop 420ms ease 120ms both;
}

.success-card h2 {
  margin: 0 0 10px;
  font-family: "Instrument Serif", serif;
  font-weight: 400;
  letter-spacing: -0.03em;
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 0.98;
}

.success-card p {
  margin: 0 0 16px;
  color: var(--muted);
  line-height: 1.7;
}

.error-text {
  min-height: 18px;
  color: var(--danger);
  font-size: 0.85rem;
  font-weight: 500;
}

.invalid {
  border-color: rgba(200, 69, 69, 0.56) !important;
  box-shadow: 0 0 0 5px rgba(200, 69, 69, 0.12) !important;
}

.submit-button:disabled {
  opacity: 0.74;
  cursor: wait;
  transform: none;
}

.honeypot,
.is-hidden {
  display: none !important;
}

@keyframes pulse-ring {
  0% {
    transform: scale(0.84);
    opacity: 0.9;
  }
  70% {
    transform: scale(1.12);
    opacity: 0;
  }
  100% {
    transform: scale(1.12);
    opacity: 0;
  }
}

@keyframes check-pop {
  0% {
    opacity: 0;
    transform: rotate(-45deg) scale(0.4);
  }
  100% {
    opacity: 1;
    transform: rotate(-45deg) scale(1);
  }
}

@media (max-width: 1120px) {
  .page-header {
    flex-wrap: wrap;
    border-radius: 28px;
  }

  .header-note {
    width: 100%;
    justify-content: flex-start;
  }

  .payment-primary {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .page-header {
    align-items: flex-start;
  }

  .brand {
    width: 100%;
  }

  .hero-meta {
    gap: 8px;
  }

  .hero-meta span {
    width: 100%;
    justify-content: flex-start;
    border-radius: 16px;
    padding: 10px 14px;
  }
}

@media (max-width: 760px) {
  .page-shell {
    width: min(calc(100% - 16px), var(--container));
    padding-top: 10px;
  }

  .page-header,
  .intro-card,
  .form-panel,
  .payment-box,
  .success-card {
    padding-left: 18px;
    padding-right: 18px;
  }

  .page-header {
    flex-direction: column;
    align-items: flex-start;
    border-radius: 26px;
  }

  .header-note {
    width: 100%;
    justify-content: flex-start;
  }

  .partner-logos {
    gap: 14px 16px;
  }

  .field-grid,
  .payment-grid,
  .bank-grid {
    grid-template-columns: 1fr;
  }

  .brand-name {
    font-size: 1.32rem;
  }

  .brand-logo {
    width: 48px;
    height: 48px;
  }

  .intro-card,
  .form-panel {
    border-radius: 24px;
  }

  .button {
    width: 100%;
  }

  .payment-card,
  .bank-card,
  .qr-panel {
    padding: 16px;
  }

  .payment-detail-card summary,
  .payment-detail-body {
    padding-left: 16px;
    padding-right: 16px;
  }

  .payment-detail-body {
    padding-bottom: 16px;
  }

  #qrImage {
    max-width: 240px;
  }

  .success-card {
    padding-top: 24px;
    padding-bottom: 24px;
  }
}

@media (max-width: 480px) {
  .page-shell {
    width: min(calc(100% - 12px), var(--container));
    padding-bottom: 28px;
  }

  .page-header,
  .intro-card,
  .form-panel,
  .payment-box,
  .poster-frame,
  .success-card {
    padding-left: 14px;
    padding-right: 14px;
  }

  .intro-card {
    padding-top: 22px;
    padding-bottom: 22px;
  }

  .partner-strip {
    padding: 14px;
  }

  .payment-primary {
    gap: 12px;
  }

  .partner-logos {
    justify-content: center;
  }

  .partner-logo-adm {
    height: 20px;
  }

  .partner-logo-yi {
    height: 32px;
  }

  .partner-logo-edu {
    height: 52px;
  }

  .choice-row {
    gap: 10px;
  }

  .choice-row label {
    width: 100%;
    justify-content: flex-start;
    border-radius: 14px;
  }

  .payment-detail-card summary {
    font-size: 0.96rem;
  }

  .section-heading h2,
  .poster-copy h2 {
    line-height: 1.02;
  }

  .payment-helper,
  .intro-card p,
  .poster-copy p,
  .form-status,
  .consent span {
    font-size: 0.95rem;
  }

  .success-card {
    border-radius: 24px;
    padding-top: 22px;
    padding-bottom: 22px;
  }

  .success-badge {
    width: 76px;
    height: 76px;
  }
}