:root {
  color-scheme: light;
  --canvas: #f7f4ed;
  --surface: rgba(255, 255, 255, 0.92);
  --surface-strong: #ffffff;
  --ink: #263129;
  --muted: #657069;
  --line: #dde5de;
  --green: #3f9567;
  --green-dark: #276846;
  --green-soft: #e4f2e9;
  --amber-soft: #fff4d8;
  --shadow: 0 18px 50px rgba(51, 77, 60, 0.09);
  --radius-large: 28px;
  --radius-medium: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 92% 6%, rgba(165, 218, 183, 0.28), transparent 26rem),
    radial-gradient(circle at 8% 30%, rgba(255, 220, 151, 0.2), transparent 24rem),
    var(--canvas);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--green-dark);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--green);
}

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

button,
select {
  cursor: pointer;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--ink);
  color: white;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
  padding: 26px 0 0;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 12px 16px 12px 20px;
  border: 1px solid rgba(221, 229, 222, 0.9);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 8px 30px rgba(42, 70, 50, 0.05);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 17px;
  font-weight: 750;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 12px;
  background: var(--green-soft);
  color: var(--green-dark);
  font-weight: 800;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  padding: 7px 13px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
}

.nav-links a[aria-current="page"],
.nav-links a:hover {
  background: var(--green-soft);
  color: var(--green-dark);
}

main {
  width: min(920px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  padding: 86px 0 44px;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  padding: 7px 13px;
  border-radius: 999px;
  background: var(--green-soft);
  color: var(--green-dark);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.hero h1 {
  max-width: 760px;
  margin: 0 auto;
  font-size: clamp(36px, 7vw, 62px);
  line-height: 1.14;
  letter-spacing: -0.035em;
}

.hero p {
  max-width: 650px;
  margin: 22px auto 0;
  color: var(--muted);
  font-size: clamp(16px, 2vw, 19px);
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 30px;
}

.button,
button.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: var(--surface-strong);
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
  transition: transform 150ms ease, box-shadow 150ms ease, background 150ms ease;
}

.button:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 28px rgba(51, 77, 60, 0.11);
}

.button.primary {
  border-color: var(--green);
  background: var(--green);
  color: white;
}

.button.primary:hover {
  background: var(--green-dark);
}

.button[disabled] {
  cursor: wait;
  opacity: 0.68;
  transform: none;
}

.page-heading {
  padding: 76px 0 36px;
}

.page-heading h1 {
  margin: 0;
  font-size: clamp(34px, 6vw, 52px);
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.page-heading p {
  max-width: 700px;
  margin: 16px 0 0;
  color: var(--muted);
}

.meta-line {
  margin-top: 15px;
  color: var(--muted);
  font-size: 14px;
}

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

.card,
.document {
  border: 1px solid rgba(221, 229, 222, 0.95);
  border-radius: var(--radius-large);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.card {
  padding: 28px;
}

.card h2,
.card h3 {
  margin: 0 0 10px;
  line-height: 1.35;
}

.card p:last-child {
  margin-bottom: 0;
}

.card-icon {
  display: grid;
  width: 46px;
  height: 46px;
  margin-bottom: 18px;
  place-items: center;
  border-radius: 16px;
  background: var(--green-soft);
  color: var(--green-dark);
  font-weight: 800;
}

.document {
  padding: clamp(24px, 5vw, 52px);
}

.document section + section {
  margin-top: 42px;
  padding-top: 38px;
  border-top: 1px solid var(--line);
}

.document h2 {
  margin: 0 0 14px;
  font-size: clamp(21px, 3vw, 26px);
  line-height: 1.35;
}

.document h3 {
  margin: 26px 0 8px;
  font-size: 17px;
}

.document p {
  margin: 10px 0;
}

.document ul,
.document ol {
  margin: 12px 0;
  padding-left: 1.4em;
}

.document li + li {
  margin-top: 8px;
}

.notice {
  margin: 0 0 28px;
  padding: 18px 20px;
  border: 1px solid #efdca8;
  border-radius: var(--radius-medium);
  background: var(--amber-soft);
}

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

details {
  border: 1px solid var(--line);
  border-radius: var(--radius-medium);
  background: var(--surface-strong);
}

summary {
  padding: 18px 20px;
  font-weight: 700;
  cursor: pointer;
}

details p {
  margin: 0;
  padding: 0 20px 20px;
  color: var(--muted);
}

.support-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  gap: 20px;
  align-items: start;
}

.form-card {
  padding: clamp(24px, 4vw, 36px);
}

.form-card h2 {
  margin-top: 0;
}

.field {
  margin-top: 20px;
}

.field label {
  display: block;
  margin-bottom: 7px;
  font-weight: 700;
}

.field-help {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid #cdd7cf;
  border-radius: 14px;
  background: #fff;
  color: var(--ink);
  outline: none;
}

input,
select {
  min-height: 48px;
  padding: 9px 12px;
}

textarea {
  min-height: 180px;
  resize: vertical;
  padding: 12px;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 4px rgba(63, 149, 103, 0.13);
}

.form-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 24px;
}

.form-status {
  min-height: 28px;
  margin: 18px 0 0;
  padding: 0;
  color: var(--muted);
}

.form-status.success,
.form-status.error {
  padding: 13px 15px;
  border-radius: 13px;
}

.form-status.success {
  background: var(--green-soft);
  color: var(--green-dark);
}

.form-status.error {
  background: #fff0ed;
  color: #a13c2e;
}

.honeypot {
  position: absolute !important;
  left: -10000px !important;
  width: 1px !important;
  height: 1px !important;
  overflow: hidden !important;
}

.quick-links {
  display: grid;
  gap: 12px;
}

.quick-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface-strong);
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
}

.quick-links a::after {
  content: "›";
  color: var(--green);
  font-size: 24px;
  line-height: 1;
}

.security-notice {
  margin-top: 24px;
  margin-bottom: 0;
}

.site-footer {
  width: min(920px, calc(100% - 40px));
  margin: 46px auto 0;
  padding: 30px 0 42px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

.site-footer p {
  margin: 6px 0;
}

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-bottom: 12px;
}

@media (max-width: 760px) {
  .site-header,
  main,
  .site-footer {
    width: min(100% - 28px, 920px);
  }

  .site-header {
    padding-top: 14px;
  }

  .nav {
    align-items: flex-start;
    border-radius: 22px;
  }

  .nav-links {
    display: grid;
    grid-template-columns: repeat(3, auto);
  }

  .nav-links a {
    padding: 5px 8px;
    font-size: 13px;
  }

  .hero {
    padding: 64px 0 32px;
  }

  .hero-actions,
  .form-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .grid,
  .support-layout {
    grid-template-columns: 1fr;
  }

  .page-heading {
    padding: 58px 0 28px;
  }

  .card {
    padding: 22px;
  }
}

@media (max-width: 470px) {
  .nav {
    align-items: stretch;
    flex-direction: column;
    gap: 8px;
    padding: 14px;
  }

  .nav-links {
    grid-template-columns: repeat(3, 1fr);
  }

  .nav-links a {
    text-align: center;
  }

  .hero h1 {
    font-size: 38px;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}