:root {
  --subpage-text: #1d1d1f;
  --subpage-text-soft: #6e6e73;
  --subpage-text-muted: #86868b;
  --subpage-primary: #0071e3;
  --subpage-primary-dark: #0077ed;
  --subpage-border: rgba(0, 0, 0, .06);
  --subpage-shadow: 0 4px 24px rgba(15, 23, 42, .05);
  --text-contrast-shadow: none;
}

html[data-theme="dark"] {
  --subpage-text: #f5f5f7;
  --subpage-text-soft: #a1a1a6;
  --subpage-text-muted: #6e6e73;
  --subpage-border: rgba(255, 255, 255, .08);
  --subpage-shadow: 0 4px 24px rgba(0, 0, 0, .32);
  --text-contrast-shadow: none;
}

.contact-body {
  min-height: 100vh;
  color: var(--subpage-text);
  background: #dce7f1 url('../assets/server-background.avif') center top / cover fixed !important;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.contact-body::before,
.contact-body::after {
  display: none !important;
}

html[data-theme="dark"] .contact-body {
  background: #14161b linear-gradient(rgba(18, 18, 20, .78), rgba(18, 18, 20, .86)), url('../assets/server-background.avif') center top / cover fixed !important;
}

.contact-main {
  position: relative;
  width: min(1060px, calc(100% - 48px));
  margin: 0 auto;
  padding: 144px 0 84px;
}

/* Back Button Row - High z-index to guarantee clickability */
.contact-back-row {
  position: absolute;
  top: 112px;
  left: 0;
  z-index: 30;
  pointer-events: auto;
}

.contact-back-button {
  position: relative;
  z-index: 31;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 34px;
  padding: 7px 14px;
  border: 1px solid var(--line, rgba(255, 255, 255, 0.72));
  border-radius: 9999px !important;
  color: var(--subpage-text-soft);
  background: var(--glass, rgba(250, 250, 252, .8));
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.04);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  cursor: pointer;
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  text-decoration: none;
  transition: color .2s ease, border-color .2s ease, background .2s ease, transform .2s ease, box-shadow .2s ease;
}

.contact-back-button svg {
  width: 15px;
  height: 15px;
  color: var(--subpage-primary);
  transition: transform .2s ease;
}

.contact-back-button:hover {
  color: var(--subpage-primary);
  border-color: rgba(0, 113, 227, .3);
  background: rgba(255, 255, 255, 0.95);
  transform: translateX(-2px);
  box-shadow: 0 4px 16px rgba(0, 113, 227, 0.15);
}

.contact-back-button:hover svg {
  transform: translateX(-1px);
}

.contact-back-button:active {
  transform: scale(.97);
}

html[data-theme="dark"] .contact-back-button {
  background: rgba(24, 25, 27, 0.78);
  border-color: rgba(255, 255, 255, 0.12);
  color: var(--subpage-text);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

html[data-theme="dark"] .contact-back-button:hover {
  background: rgba(32, 34, 40, 0.9);
  border-color: rgba(59, 130, 246, 0.4);
  color: #60a5fa;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

/* Contact Hero Section - Frosted Glass Card */
.contact-hero {
  max-width: 680px;
  margin: 0 auto 36px;
  padding: 34px 40px;
  border: 1px solid var(--line, rgba(255, 255, 255, 0.72));
  border-radius: 24px;
  background: var(--glass-gradient, var(--glass, rgba(250, 250, 252, .8)));
  box-shadow: var(--shadow-subtle, 0 10px 24px rgba(15, 23, 42, .05));
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  text-align: center;
  position: relative;
  z-index: 1;
}

html[data-theme="dark"] .contact-hero {
  background: rgba(22, 22, 26, .82);
  border-color: rgba(255, 255, 255, .14);
  box-shadow: 0 16px 36px rgba(0, 0, 0, .4);
}

.contact-hero .guide-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 auto 14px;
  color: var(--subpage-primary-dark);
  font-family: 'Quicksand', 'Noto Sans SC', sans-serif;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .12em;
}

.contact-hero .guide-kicker svg {
  width: 16px;
  height: 16px;
}

.contact-hero h1 {
  margin: 0;
  color: var(--subpage-text);
  font-size: clamp(38px, 4.8vw, 52px);
  font-weight: 750;
  letter-spacing: -.02em;
  line-height: 1.15;
}

.contact-hero h1 em {
  color: var(--subpage-primary);
  font-style: normal;
}

.contact-hero p:last-child {
  margin: 16px auto 0;
  color: var(--subpage-text-soft);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.85;
}

/* Contact Layout & Cards - Pure White Reading Canvas */
.contact-layout {
  display: grid;
  grid-template-columns: minmax(260px, .72fr) minmax(0, 1.28fr);
  gap: 20px;
  align-items: start;
  position: relative;
  z-index: 1;
}

.contact-aside {
  display: grid;
  gap: 14px;
}

.contact-intro {
  padding: 28px;
  border: 1px solid var(--line, rgba(255, 255, 255, 0.72));
  border-radius: 20px;
  background: var(--glass-gradient, var(--glass, rgba(250, 250, 252, .8)));
  box-shadow: var(--shadow-subtle, 0 10px 24px rgba(15, 23, 42, .05));
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
}

html[data-theme="dark"] .contact-intro {
  background: rgba(22, 22, 26, .82);
  border-color: rgba(255, 255, 255, .14);
  box-shadow: var(--subpage-shadow);
}

.contact-icon {
  display: grid;
  place-items: center;
  width: 45px;
  height: 45px;
  margin-bottom: 18px;
  border-radius: 12px;
  color: #fff;
  background: var(--subpage-primary);
  box-shadow: 0 6px 16px rgba(0, 113, 227, .24);
}

.contact-icon svg {
  width: 21px;
}

.contact-intro h2 {
  margin: 0;
  color: var(--subpage-text);
  font-size: 20px;
  font-weight: 750;
  letter-spacing: -.01em;
}

.contact-intro ul {
  display: grid;
  gap: 12px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.contact-intro li {
  position: relative;
  padding-left: 17px;
  color: var(--subpage-text-soft);
  font-size: 13px;
  font-weight: 550;
  line-height: 1.6;
}

.contact-intro li::before {
  position: absolute;
  top: .6em;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--subpage-primary);
  content: '';
}

.community-card {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) 18px;
  gap: 13px;
  align-items: start;
  padding: 20px;
  border: 1px solid var(--line, rgba(255, 255, 255, 0.72));
  border-radius: 18px;
  color: var(--subpage-text);
  background: var(--glass-gradient, var(--glass, rgba(250, 250, 252, .8)));
  box-shadow: var(--shadow-subtle, 0 4px 20px rgba(15, 23, 42, .04));
  text-decoration: none;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease, background .2s ease;
}

.community-card:hover {
  transform: translateY(-3px);
  background: rgba(255, 255, 255, .95);
  border-color: rgba(0, 113, 227, .3);
  box-shadow: 0 12px 30px rgba(0, 113, 227, .12);
}

html[data-theme="dark"] .community-card {
  background: rgba(22, 22, 26, .82) !important;
  border-color: rgba(255, 255, 255, .14) !important;
  box-shadow: 0 4px 24px rgba(0, 0, 0, .32) !important;
}

html[data-theme="dark"] .community-card:hover {
  background: rgba(30, 32, 38, .92) !important;
  border-color: rgba(59, 130, 246, .4) !important;
  box-shadow: 0 12px 30px rgba(0, 0, 0, .45) !important;
}

.community-card > span {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  color: #fff;
  background: #34c759;
}

.community-card > span svg {
  width: 19px;
}

.community-card small,
.community-card strong,
.community-card p {
  display: block;
}

.community-card small {
  margin-bottom: 4px;
  color: var(--subpage-text-soft);
  font-family: 'Quicksand', sans-serif;
  font-size: 9.5px;
  font-weight: 800;
  letter-spacing: .12em;
}

.community-card strong {
  font-size: 14px;
  font-weight: 750;
  color: var(--subpage-text);
}

.community-card p {
  margin: 5px 0 0;
  color: var(--subpage-text-soft);
  font-size: 12px;
  font-weight: 500;
  line-height: 1.55;
}

.community-card > svg {
  width: 17px;
  margin-top: 4px;
  color: var(--subpage-primary);
  transition: transform .2s ease;
}

.community-card:hover > svg {
  transform: translate(2px, -2px);
}

/* Contact Form - Apple Frosted Glass */
.contact-form {
  padding: 32px;
  border: 1px solid var(--line, rgba(255, 255, 255, 0.72));
  border-radius: 20px;
  background: var(--glass-gradient, var(--glass, rgba(250, 250, 252, .8)));
  box-shadow: var(--shadow-subtle, 0 10px 24px rgba(15, 23, 42, .05));
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
}

html[data-theme="dark"] .contact-form {
  background: rgba(22, 22, 26, .82);
  border-color: rgba(255, 255, 255, .14);
  box-shadow: var(--subpage-shadow);
}

.form-head {
  display: grid;
  gap: 0;
  margin-bottom: 24px;
}

.form-head > p {
  margin: 0 0 6px;
  color: var(--subpage-primary-dark);
  font-family: 'Quicksand', sans-serif;
  font-size: 10.5px;
  font-weight: 800;
  letter-spacing: .12em;
}

.form-head h2 {
  margin: 0;
  color: var(--subpage-text);
  font-size: 26px;
  font-weight: 750;
  letter-spacing: -.02em;
}

.form-head > span {
  margin-top: 6px;
  color: var(--subpage-text-soft);
  font-size: 12px;
  font-weight: 550;
}

/* Solid Non-Transparent Inputs - High Readability */
.contact-fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.contact-fields label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  justify-content: flex-start;
  min-width: 0;
  color: var(--subpage-text);
  font-size: 12px;
  font-weight: 650;
}

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

.contact-fields input,
.contact-fields select,
.contact-fields textarea {
  width: 100%;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 12px;
  outline: 0;
  color: var(--subpage-text);
  background: rgba(255, 255, 255, 0.65);
  box-shadow: none;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  font: inherit;
  font-size: 13.5px;
  transition: border-color .2s ease, background .2s ease, box-shadow .2s ease;
  box-sizing: border-box;
}

.contact-fields input,
.contact-fields select {
  height: 48px;
  min-height: 48px;
  padding: 0 15px;
}

.contact-fields textarea {
  min-height: 168px;
  padding: 14px 15px;
  resize: vertical;
  line-height: 1.7;
}

.contact-fields input::placeholder,
.contact-fields textarea::placeholder {
  color: #86868b;
}

.contact-fields input:hover,
.contact-fields select:hover,
.contact-fields textarea:hover {
  background: rgba(255, 255, 255, 0.85);
  border-color: rgba(0, 0, 0, 0.14);
}

.contact-fields input:focus,
.contact-fields select:focus,
.contact-fields textarea:focus {
  border-color: var(--subpage-primary);
  background: #ffffff;
  box-shadow: 0 0 0 4px rgba(0, 113, 227, .12);
}

html[data-theme="dark"] .contact-fields input,
html[data-theme="dark"] .contact-fields select,
html[data-theme="dark"] .contact-fields textarea {
  border-color: rgba(255, 255, 255, 0.1) !important;
  color: #f5f5f7 !important;
  background: rgba(32, 34, 40, 0.65) !important;
  box-shadow: none !important;
}

html[data-theme="dark"] .contact-fields input:hover,
html[data-theme="dark"] .contact-fields select:hover,
html[data-theme="dark"] .contact-fields textarea:hover {
  background: rgba(37, 40, 48, 0.85) !important;
  border-color: rgba(255, 255, 255, 0.16) !important;
}

html[data-theme="dark"] .contact-fields input:focus,
html[data-theme="dark"] .contact-fields select:focus,
html[data-theme="dark"] .contact-fields textarea:focus {
  border-color: #3b82f6 !important;
  background: #272a33 !important;
  box-shadow: 0 0 0 4px rgba(59, 130, 246, .2) !important;
}

.contact-message {
  position: relative;
  grid-column: 1 / -1;
}

.contact-message small {
  justify-self: end;
  margin-top: -2px;
  color: var(--subpage-text-muted);
  font-size: 11px;
  font-weight: 600;
}

.contact-honeypot {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
}

.form-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 24px;
}

.form-status {
  flex: 1;
  min-height: 18px;
  margin: 0;
  color: #34c759;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.5;
}

.form-status.is-error {
  color: #ff3b30;
}

.form-actions .button:disabled {
  cursor: wait;
  opacity: .65;
}

/* Custom Clean Select Component */
.custom-select-wrapper {
  position: relative;
  width: 100%;
}

.custom-select-wrapper select {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
  opacity: 0 !important;
  pointer-events: none !important;
}

.custom-select-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  width: 100%;
  height: 48px;
  min-height: 48px;
  padding: 0 16px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 12px;
  outline: 0;
  color: var(--subpage-text);
  background: rgba(255, 255, 255, 0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: none;
  font: inherit;
  font-size: 13.5px;
  font-weight: 550;
  cursor: pointer;
  box-sizing: border-box;
  text-align: left;
  transition: border-color .2s ease, background .2s ease, box-shadow .2s ease;
}

.custom-select-trigger:hover {
  background: rgba(255, 255, 255, 0.85);
  border-color: rgba(0, 0, 0, 0.14);
}

.custom-select-trigger:focus,
.custom-select-wrapper.is-open .custom-select-trigger {
  border-color: var(--subpage-primary);
  background: #ffffff;
  box-shadow: 0 0 0 4px rgba(0, 113, 227, .12);
}

.custom-select-label {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.custom-select-arrow {
  width: 16px;
  height: 16px;
  color: var(--subpage-text-muted);
  flex-shrink: 0;
  transition: transform .25s cubic-bezier(0.2, 0.8, 0.2, 1), color .2s ease;
}

.custom-select-wrapper.is-open .custom-select-arrow {
  transform: rotate(180deg);
  color: var(--subpage-primary);
}

.custom-select-menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  z-index: 120;
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 6px;
  border: 1px solid var(--line, rgba(255, 255, 255, 0.72));
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 12px 36px rgba(15, 23, 42, .14);
  animation: customSelectIn .2s cubic-bezier(0.2, 0.8, 0.2, 1);
  transform-origin: top center;
}

.custom-select-menu[hidden] {
  display: none !important;
}

@keyframes customSelectIn {
  from {
    opacity: 0;
    transform: translateY(-8px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.custom-select-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: 38px;
  padding: 0 12px;
  border-radius: 9px;
  color: var(--subpage-text);
  font-size: 13px;
  font-weight: 550;
  cursor: pointer;
  transition: background-color .15s ease, color .15s ease, transform .15s ease;
  user-select: none;
}

.custom-select-option:hover {
  background: rgba(0, 113, 227, .08);
  color: var(--subpage-primary);
  transform: translateX(2px);
}

.custom-select-option.is-selected {
  background: var(--subpage-primary);
  color: #fff !important;
  font-weight: 650;
  box-shadow: 0 4px 12px rgba(0, 113, 227, .28);
}

.custom-select-option.is-placeholder {
  color: var(--subpage-text-muted);
  opacity: .85;
}

.custom-select-option.is-placeholder.is-selected {
  color: #fff !important;
  opacity: 1;
}

.custom-select-check {
  width: 15px;
  height: 15px;
  opacity: 0;
  flex-shrink: 0;
  transition: opacity .15s ease;
}

.custom-select-option.is-selected .custom-select-check {
  opacity: 1;
}

/* Custom Select Dark Mode */
html[data-theme="dark"] .custom-select-trigger {
  background: rgba(32, 34, 40, 0.65) !important;
  border-color: rgba(255, 255, 255, 0.1) !important;
  color: #f5f5f7 !important;
  box-shadow: none !important;
}

html[data-theme="dark"] .custom-select-trigger:hover {
  background: rgba(37, 40, 48, 0.85) !important;
  border-color: rgba(255, 255, 255, 0.16) !important;
}

html[data-theme="dark"] .custom-select-trigger:focus,
html[data-theme="dark"] .custom-select-wrapper.is-open .custom-select-trigger {
  background: #272a33 !important;
  border-color: #3b82f6 !important;
  box-shadow: 0 0 0 4px rgba(59, 130, 246, .2) !important;
}

html[data-theme="dark"] .custom-select-menu {
  background: rgba(28, 30, 36, 0.92) !important;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-color: rgba(255, 255, 255, 0.12) !important;
  box-shadow: 0 16px 40px rgba(0, 0, 0, .5) !important;
}

html[data-theme="dark"] .custom-select-option {
  color: #f5f5f7 !important;
}

html[data-theme="dark"] .custom-select-option:hover {
  background: rgba(59, 130, 246, .18) !important;
  color: #60a5fa !important;
}

html[data-theme="dark"] .custom-select-option.is-selected {
  background: var(--subpage-primary) !important;
  color: #fff !important;
}

/* Mobile Responsive */
@media (max-width: 760px) {
  .contact-main {
    width: min(100% - 28px, 560px);
    padding-top: 108px;
    padding-bottom: 60px;
  }
  .contact-back-row {
    top: 80px;
  }
  .contact-hero {
    margin-bottom: 30px;
  }
  .contact-hero h1 {
    font-size: 38px;
  }
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .contact-intro,
  .contact-form {
    padding: 22px;
  }
  .contact-fields {
    grid-template-columns: 1fr;
  }
  .contact-message {
    grid-column: span 1;
  }
  .form-actions {
    align-items: stretch;
    flex-direction: column;
  }
  .form-actions .button {
    width: 100%;
  }
}