:root {
  --bg: #f5efe5;
  --surface: rgba(255, 250, 242, 0.84);
  --surface-strong: rgba(255, 255, 255, 0.92);
  --ink: #15231d;
  --muted: #5c6961;
  --line: rgba(21, 35, 29, 0.12);
  --accent: #de6435;
  --accent-deep: #a8401d;
  --green: #196f63;
  --shadow: 0 24px 70px rgba(50, 39, 22, 0.12);
  --shadow-soft: 0 16px 36px rgba(21, 35, 29, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Avenir Next", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(244, 185, 138, 0.42), transparent 24%),
    radial-gradient(circle at 90% 8%, rgba(189, 227, 216, 0.48), transparent 20%),
    linear-gradient(180deg, #f9f4ec 0%, var(--bg) 48%, #efe5d8 100%);
}

body::before {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.22) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.22) 1px, transparent 1px);
  background-size: 36px 36px;
  content: "";
  pointer-events: none;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.48), transparent 88%);
}

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

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 18px;
  left: 18px;
  z-index: 20;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  transform: translateY(-140%);
  transition: transform 0.2s ease;
}

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

.page-shell {
  width: min(calc(100% - 32px), 1120px);
  margin: 0 auto;
  padding-bottom: 88px;
}

.topbar {
  position: sticky;
  top: 16px;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 16px;
  padding: 16px 20px;
  border: 1px solid rgba(255, 255, 255, 0.46);
  border-radius: 999px;
  background: rgba(255, 250, 242, 0.82);
  backdrop-filter: blur(18px);
  box-shadow: 0 18px 38px rgba(21, 35, 29, 0.08);
}

.brand,
.brand-copy,
.topbar-actions,
.hero-card__actions,
.platform-card__head {
  display: flex;
}

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

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 15px;
  background: linear-gradient(135deg, var(--accent), #ef8d59);
  color: #fff8f0;
  font-family: "DIN Alternate", "Arial Narrow", "PingFang SC", sans-serif;
  font-size: 25px;
  font-weight: 700;
}

.brand-copy {
  flex-direction: column;
  gap: 2px;
}

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

.brand-copy small,
.hero-text,
.status-copy,
.platform-card p,
.guide-card p,
.faq-item p {
  color: var(--muted);
}

.brand-copy small {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.topbar-actions {
  align-items: center;
  gap: 12px;
}

.ghost-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.4);
}

.ghost-link--primary {
  background: rgba(21, 35, 29, 0.08);
}

.hero,
.platform-grid,
.guide-grid {
  display: grid;
  gap: 20px;
}

.hero {
  grid-template-columns: 1.06fr 0.94fr;
  align-items: center;
  min-height: calc(100vh - 132px);
  padding-top: 36px;
}

.eyebrow,
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  color: var(--accent-deep);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.eyebrow::before,
.kicker::before {
  width: 28px;
  height: 1px;
  background: currentColor;
  content: "";
}

.hero h1,
.section-heading h2 {
  margin: 0;
  font-family: "DIN Alternate", "Arial Narrow", "PingFang SC", sans-serif;
}

.hero h1 {
  max-width: 12ch;
  font-size: clamp(46px, 8vw, 78px);
  line-height: 0.98;
}

.hero-text {
  max-width: 600px;
  margin: 24px 0 0;
  font-size: 17px;
  line-height: 1.8;
}

.status-panel,
.hero-card,
.platform-card,
.guide-card,
.faq-panel,
.faq-item {
  border: 1px solid rgba(255, 255, 255, 0.48);
  background: var(--surface);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.status-panel {
  max-width: 560px;
  margin-top: 28px;
  padding: 18px 20px;
  border-radius: 24px;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(21, 35, 29, 0.08);
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.status-copy {
  margin: 12px 0 0;
  line-height: 1.7;
}

.hero-card {
  padding: 28px;
  border-radius: 30px;
  background:
    radial-gradient(circle at top right, rgba(189, 227, 216, 0.42), transparent 26%),
    var(--surface-strong);
}

.hero-card__header {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.hero-card__header strong {
  font-size: 28px;
  line-height: 1.15;
}

.hero-card__copy,
.platform-card p,
.guide-card p,
.faq-item p {
  margin: 0;
  line-height: 1.78;
}

.hero-card__copy {
  margin-top: 16px;
}

.hero-card__actions {
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 24px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 160px;
  min-height: 52px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    background 0.2s ease,
    border-color 0.2s ease;
}

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

.button-primary {
  background: linear-gradient(135deg, var(--accent), #ef8d59);
  color: #fff8f0;
  box-shadow: 0 18px 40px rgba(222, 100, 53, 0.22);
}

.button-secondary {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.58);
}

.button-block {
  width: 100%;
}

.button.is-disabled {
  opacity: 0.56;
  pointer-events: none;
  box-shadow: none;
}

.platform-grid {
  grid-template-columns: repeat(3, 1fr);
  margin-top: 12px;
}

.platform-card {
  padding: 24px;
  border-radius: 28px;
}

.platform-card--accent {
  background:
    radial-gradient(circle at top right, rgba(244, 185, 138, 0.24), transparent 28%),
    var(--surface-strong);
}

.platform-card__head {
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.platform-mark,
.platform-tag,
.guide-step {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
}

.platform-mark {
  background: rgba(21, 35, 29, 0.08);
}

.platform-tag {
  background: rgba(255, 255, 255, 0.58);
  color: var(--accent-deep);
}

.platform-card h2,
.guide-card h3,
.faq-item summary {
  margin: 18px 0 10px;
}

.platform-card h2 {
  font-size: 28px;
}

.platform-card p {
  min-height: 112px;
}

.platform-card .button {
  margin-top: 22px;
}

.platform-card.is-recommended {
  border-color: rgba(222, 100, 53, 0.34);
  box-shadow: 0 26px 60px rgba(222, 100, 53, 0.12);
}

.guide-grid {
  grid-template-columns: repeat(3, 1fr);
  margin-top: 22px;
}

.guide-card {
  padding: 24px;
  border-radius: 28px;
}

.guide-step {
  background: rgba(25, 111, 99, 0.12);
  color: var(--green);
}

.faq-panel {
  margin-top: 22px;
  padding: 30px;
  border-radius: 32px;
}

.section-heading {
  max-width: 740px;
}

.section-heading h2 {
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.04;
}

.faq-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-top: 26px;
}

.faq-item {
  padding: 24px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.56);
  box-shadow: var(--shadow-soft);
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  font-size: 18px;
  font-weight: 700;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item p {
  margin-top: 14px;
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

@media (max-width: 1080px) {
  .hero,
  .platform-grid,
  .guide-grid,
  .faq-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .platform-grid article:last-child,
  .faq-panel {
    grid-column: 1 / -1;
  }
}

@media (max-width: 760px) {
  .page-shell {
    width: min(calc(100% - 20px), 1120px);
  }

  .topbar {
    top: 10px;
    margin-top: 10px;
    flex-direction: column;
    align-items: stretch;
    border-radius: 28px;
  }

  .topbar-actions {
    flex-wrap: wrap;
  }

  .hero,
  .platform-grid,
  .guide-grid,
  .faq-list {
    grid-template-columns: 1fr;
  }

  .ghost-link,
  .button {
    width: 100%;
  }

  .hero {
    padding-top: 28px;
  }

  .hero h1 {
    max-width: none;
    font-size: clamp(40px, 15vw, 62px);
  }

  .platform-card p {
    min-height: auto;
  }

  .faq-panel {
    padding: 22px;
  }
}