:root {
  color-scheme: light;
  --bg: #fbf9ff;
  --bg-2: #f4efff;
  --card: rgba(255, 255, 255, 0.78);
  --card-solid: #ffffff;
  --line: rgba(118, 77, 220, 0.16);
  --text: #21173b;
  --muted: #6e6287;
  --muted-2: #9186a8;
  --primary: #7c3aed;
  --primary-2: #a855f7;
  --accent: #ec4899;
  --soft: #f0e7ff;
  --soft-2: #faf5ff;
  --shadow: 0 24px 80px rgba(92, 50, 160, 0.14);
  --shadow-soft: 0 12px 38px rgba(92, 50, 160, 0.1);
  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 14% 6%, rgba(168, 85, 247, 0.2), transparent 28%),
    radial-gradient(circle at 86% 14%, rgba(236, 72, 153, 0.14), transparent 30%),
    linear-gradient(180deg, #ffffff 0%, var(--bg) 52%, #ffffff 100%);
  overflow-x: hidden;
}

body::selection {
  color: #fff;
  background: rgba(124, 58, 237, 0.72);
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.site-bg {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  pointer-events: none;
}

.glow {
  position: absolute;
  width: 560px;
  height: 560px;
  border-radius: 999px;
  filter: blur(12px);
  opacity: 0.6;
}

.glow-a {
  top: -250px;
  right: -150px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.26), transparent 66%);
}

.glow-b {
  left: -220px;
  top: 320px;
  background: radial-gradient(circle, rgba(236, 72, 153, 0.16), transparent 66%);
}

.mesh {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(124, 58, 237, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124, 58, 237, 0.055) 1px, transparent 1px);
  background-size: 78px 78px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.78), transparent 72%);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  width: min(calc(100% - 28px), var(--max));
  margin: 14px auto 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 12px 14px 12px 16px;
  border: 1px solid rgba(124, 58, 237, 0.14);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-soft);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  letter-spacing: 0.04em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 14px;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 14px 30px rgba(124, 58, 237, 0.28);
}

.brand-text {
  font-size: 17px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav a {
  padding: 10px 10px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav a:hover,
.nav a.active {
  color: var(--primary);
  background: rgba(124, 58, 237, 0.09);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 14px;
  background: var(--soft);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  border-radius: 99px;
  background: var(--primary);
}

.section {
  width: min(calc(100% - 36px), var(--max));
  margin: 0 auto;
  padding: 92px 0;
}

.hero {
  min-height: calc(100vh - 86px);
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(330px, 0.95fr);
  align-items: center;
  gap: 44px;
  padding-top: 62px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 0 0 6px rgba(124, 58, 237, 0.1);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin: 14px 0 22px;
  font-size: clamp(42px, 7vw, 78px);
  line-height: 1.02;
  letter-spacing: -0.06em;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.12;
  letter-spacing: -0.045em;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
}

p {
  color: var(--muted);
  line-height: 1.8;
}

.hero-lead {
  max-width: 680px;
  font-size: 18px;
}

.hero-actions,
.version-actions,
.support-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 900;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

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

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-2), var(--accent));
  box-shadow: 0 16px 36px rgba(124, 58, 237, 0.28);
}

.btn-soft {
  color: var(--primary);
  border-color: rgba(124, 58, 237, 0.14);
  background: rgba(255, 255, 255, 0.76);
  box-shadow: var(--shadow-soft);
}

.btn-soft:hover {
  border-color: rgba(124, 58, 237, 0.3);
  background: #fff;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.hero-meta span {
  padding: 8px 12px;
  border: 1px solid rgba(124, 58, 237, 0.14);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.7);
  font-size: 13px;
  font-weight: 700;
}

.hero-panel,
.feature-card,
.version-card,
.release-card,
.process-card,
.service-card,
.guide-card,
.faq-item,
.legal-card,
.support-card {
  border: 1px solid var(--line);
  background: var(--card);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.hero-panel {
  position: relative;
  padding: 32px;
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at top right, rgba(168, 85, 247, 0.2), transparent 38%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(255, 255, 255, 0.42));
}

.panel-badge {
  display: inline-flex;
  margin-bottom: 22px;
  padding: 8px 12px;
  border-radius: 999px;
  color: var(--primary);
  background: var(--soft);
  font-size: 13px;
  font-weight: 900;
}

.info-list {
  display: grid;
  gap: 12px;
  margin: 24px 0;
}

.info-list div,
.version-table div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px;
  border: 1px solid rgba(124, 58, 237, 0.12);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.68);
}

.info-list span,
.version-table span {
  color: var(--muted);
  font-size: 14px;
}

.info-list strong,
.version-table strong {
  color: var(--text);
}

.panel-note {
  padding: 16px;
  border-radius: var(--radius-md);
  color: #5f3ab3;
  background: rgba(124, 58, 237, 0.09);
  font-weight: 800;
  line-height: 1.7;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.feature-card,
.process-card,
.service-card,
.guide-card,
.legal-card {
  padding: 26px;
  border-radius: var(--radius-lg);
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.feature-card:hover,
.process-card:hover,
.service-card:hover,
.guide-card:hover,
.legal-card:hover {
  transform: translateY(-4px);
  border-color: rgba(124, 58, 237, 0.26);
  background: rgba(255, 255, 255, 0.94);
}

.feature-icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  margin-bottom: 22px;
  border-radius: 16px;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  font-weight: 900;
}

.split-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  padding-top: 44px;
}

.version-card,
.release-card,
.support-card {
  padding: 34px;
  border-radius: var(--radius-xl);
}

.version-table {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.check-list {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.check-list li,
.legal-card p,
.guide-card p {
  color: var(--muted);
  line-height: 1.8;
}

.check-list li {
  position: relative;
  padding-left: 30px;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 0 0 5px rgba(124, 58, 237, 0.08);
}

.guide-grid,
.legal-grid,
.process-grid,
.service-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.service-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.process-card span {
  display: inline-flex;
  margin-bottom: 18px;
  padding: 7px 11px;
  border-radius: 999px;
  color: var(--primary);
  background: var(--soft);
  font-size: 13px;
  font-weight: 900;
}

.service-card ul {
  margin: 16px 0 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.9;
}

.process-card p,
.service-card li,
.service-card p {
  color: var(--muted);
  line-height: 1.8;
}

.wide-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.guide-card strong {
  display: inline-flex;
  margin-bottom: 20px;
  color: var(--primary);
  font-size: 14px;
}

.faq-list {
  display: grid;
  gap: 14px;
}

.faq-item {
  padding: 0 22px;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.faq-item summary {
  cursor: pointer;
  padding: 22px 0;
  font-size: 18px;
  font-weight: 900;
  list-style: none;
}

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

.faq-item summary::after {
  content: "+";
  float: right;
  color: var(--primary);
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item p {
  margin-bottom: 22px;
}

.legal-section {
  padding-top: 54px;
}

.legal-card h3 {
  color: var(--primary);
}

.support-section {
  padding-top: 54px;
}

.support-card {
  max-width: 920px;
  margin: 0 auto;
  text-align: center;
  background:
    radial-gradient(circle at top, rgba(168, 85, 247, 0.14), transparent 45%),
    rgba(255, 255, 255, 0.84);
}

.support-actions {
  justify-content: center;
}

.copy-tip {
  min-height: 24px;
  margin: 18px 0 0;
  color: var(--primary);
  font-weight: 900;
}

.footer {
  width: min(calc(100% - 36px), var(--max));
  margin: 0 auto;
  padding: 34px 0 46px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--muted-2);
  font-size: 14px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer a:hover {
  color: var(--primary);
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1080px) {
  .features-grid,
  .guide-grid,
  .legal-grid,
  .process-grid,
  .service-grid,
  .wide-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .nav a {
    padding-inline: 9px;
  }
}

@media (max-width: 920px) {
  .hero,
  .split-section {
    grid-template-columns: 1fr;
    min-height: auto;
  }
}

@media (max-width: 760px) {
  .topbar {
    align-items: flex-start;
    flex-wrap: wrap;
    border-radius: 24px;
  }

  .nav-toggle {
    display: inline-block;
    margin-left: auto;
  }

  .nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    padding-top: 8px;
  }

  .topbar.nav-open .nav {
    display: flex;
  }

  .nav a {
    width: 100%;
    padding: 12px 14px;
  }

  .section {
    width: min(calc(100% - 28px), var(--max));
    padding: 70px 0;
  }

  .hero {
    padding-top: 54px;
  }

  h1 {
    font-size: clamp(38px, 12vw, 58px);
  }

  .features-grid,
  .guide-grid,
  .legal-grid,
  .process-grid,
  .service-grid,
  .wide-grid {
    grid-template-columns: 1fr;
  }

  .hero-panel,
  .version-card,
  .release-card,
  .support-card {
    padding: 24px;
  }

  .info-list div,
  .version-table div {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
  }

  .footer {
    flex-direction: column;
    align-items: flex-start;
  }
}