:root {
  --bg: #fafaf7;
  --surface: #ffffff;
  --text: #2f3437;
  --muted: #5c6569;
  --border: #e3e5e0;
  --primary: #2a9d8f;
  --primary-hover: #238276;
  --secondary: #4a6fa5;
  --tap-min: 44px;
  --max-width: 42.5rem;
  --space: 1rem;
  --radius: 8px;
}

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

html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  overflow-x: hidden;
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
}

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  padding: 0.5rem 1rem;
  background: var(--primary);
  color: #fff;
  z-index: 100;
}

.skip-link:focus {
  left: 0;
}

.site-header {
  padding: var(--space) calc(var(--space) * 1.25);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.site-header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.site-title {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: calc(var(--space) * 1.25) calc(var(--space) * 1.25) calc(var(--space) * 2);
}

.hero {
  margin-bottom: calc(var(--space) * 2);
  padding-bottom: calc(var(--space) * 1.25);
  border-bottom: 1px solid var(--border);
}

.hero__content {
  max-width: 36rem;
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.35;
}

.hero__lead {
  margin: 0 0 1.125rem;
  font-size: 0.9375rem;
  color: var(--text);
}

.hero__actions {
  margin-bottom: 1rem;
}

.hero__figure {
  position: relative;
  margin: 0;
  width: 100%;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  aspect-ratio: 5 / 6;
}

.hero__image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 85% center;
}

.content-section {
  margin-bottom: calc(var(--space) * 2.25);
}

.content-section h2 {
  margin: 0 0 calc(var(--space) * 0.875);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text);
}

.contact-intro {
  margin: 0 0 var(--space);
  font-size: 0.9375rem;
  color: var(--muted);
}

.accept-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.accept-list__item {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  padding: 0.625rem 0;
  border-bottom: 1px solid var(--border);
}

.accept-list__item:last-child {
  border-bottom: none;
}

.accept-list__icon {
  flex: 0 0 2.5rem;
  width: 2.5rem;
  height: 2.5rem;
  color: var(--primary);
}

.reject-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.reject-list li {
  position: relative;
  padding: 0.5rem 0 0.5rem 1.375rem;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
}

.reject-list li:last-child {
  border-bottom: none;
}

.reject-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.95rem;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--secondary);
  opacity: 0.45;
}

.coop-steps-vertical {
  list-style: none;
  margin: 0;
  padding: 0;
}

.coop-steps-vertical li {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  padding: 0.625rem 0;
}

.coop-steps-vertical__num {
  flex: 0 0 2.25rem;
  width: 2.25rem;
  height: 2.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--surface);
  border: 2px solid var(--primary);
  border-radius: 50%;
  line-height: 1;
}

.contact-list {
  margin: 0;
  padding: 0;
}

.contact-row {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  padding: 0.875rem 0;
  border-bottom: 1px solid var(--border);
}

.contact-row:last-child {
  border-bottom: none;
}

.contact-row dt {
  font-weight: 600;
  font-size: 0.875rem;
}

.contact-row__value {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  font-size: 1rem;
  word-break: break-all;
}

.contact-row__value a {
  color: var(--secondary);
  text-decoration: underline;
  text-underline-offset: 2px;
  min-height: var(--tap-min);
  display: inline-flex;
  align-items: center;
}

.contact-row__value a:focus-visible {
  outline: 2px solid var(--secondary);
  outline-offset: 2px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--tap-min);
  padding: 0.625rem 1.25rem;
  font-size: 1rem;
  font-weight: 500;
  font-family: inherit;
  text-decoration: none;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  line-height: 1.2;
}

.btn--primary {
  background: var(--primary);
  color: #fff;
}

.btn--primary:hover {
  background: var(--primary-hover);
}

.btn--ghost {
  min-height: var(--tap-min);
  padding: 0.5rem 0.875rem;
  font-size: 0.875rem;
  background: var(--surface);
  color: var(--primary);
  border: 1px solid var(--border);
}

.btn--ghost:hover {
  border-color: var(--primary);
}

.btn:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 2px;
}

.form-block {
  margin-top: calc(var(--space) * 1.25);
  padding-top: calc(var(--space) * 1.25);
  border-top: 1px dashed var(--border);
}

.form-block[hidden],
.btn[hidden] {
  display: none !important;
}

.form-block__label {
  margin: 0 0 var(--space);
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--muted);
}

.contact-form .field {
  margin-bottom: var(--space);
}

.contact-form label {
  display: block;
  margin-bottom: 0.375rem;
  font-size: 0.875rem;
  font-weight: 500;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  max-width: 100%;
  padding: 0.625rem 0.75rem;
  font-size: 1rem;
  font-family: inherit;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  min-height: var(--tap-min);
}

.contact-form textarea {
  min-height: 4.5rem;
  resize: vertical;
}

.contact-form input:focus-visible,
.contact-form textarea:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 1px;
}

.form-hint {
  margin: 0 0 var(--space);
  font-size: 0.875rem;
  color: #b45309;
}

.form-hint[hidden] {
  display: none;
}

.form-note {
  margin: 0.75rem 0 0;
  font-size: 0.8125rem;
  color: var(--muted);
}

.site-footer {
  padding: calc(var(--space) * 1.5) calc(var(--space) * 1.25);
  border-top: 1px solid var(--border);
  font-size: 0.8125rem;
  color: var(--muted);
  text-align: center;
}

.site-footer p {
  margin: 0;
}

.config-error {
  padding: var(--space);
  margin-bottom: var(--space);
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: var(--radius);
  color: #991b1b;
  font-size: 0.875rem;
}

.config-error[hidden] {
  display: none;
}

@media (min-width: 480px) {
  .contact-row {
    flex-direction: row;
    align-items: flex-start;
    gap: 1rem;
  }

  .contact-row dt {
    flex: 0 0 3.5rem;
  }

  .contact-row__value {
    flex: 1;
  }
}

@media (min-width: 640px) {
  .hero__figure {
    aspect-ratio: 16 / 9;
  }

  .hero__image {
    object-position: center;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .hero__lead {
    font-size: 1rem;
  }
}

.case-stack {
  display: flex;
  flex-direction: column;
  gap: calc(var(--space) * 1.25);
  margin: 0;
  padding: 0;
}

.case-card {
  position: relative;
  margin: 0;
  padding: 1.25rem 1.25rem 1.125rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.case-card::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 3px;
  background: var(--primary);
}

.case-card__brand {
  margin: 0 0 0.375rem;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--primary);
}

.case-card__lead {
  margin: 0 0 0.875rem;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
}

.case-card__figure {
  margin: 0 0 0.875rem;
  border-radius: calc(var(--radius) - 2px);
  overflow: hidden;
  background: var(--bg);
  aspect-ratio: 16 / 10;
  max-height: 200px;
}

.case-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.case-card__points {
  margin: 0 0 0.875rem;
  padding: 0 0 0 1.125rem;
  color: var(--muted);
  font-size: 0.9375rem;
}

.case-card__points li {
  margin: 0.25rem 0;
}

.case-card__link-wrap {
  margin: 0;
}

.case-card__link {
  color: var(--secondary);
  text-decoration: underline;
  text-underline-offset: 2px;
  font-size: 0.9375rem;
  min-height: var(--tap-min);
  display: inline-flex;
  align-items: center;
}

.case-card__link:focus-visible {
  outline: 2px solid var(--secondary);
  outline-offset: 2px;
}

@media (min-width: 640px) {
  .case-card {
    padding: 1.5rem;
  }

  .case-card__figure {
    max-height: 280px;
  }
}