:root {
  color-scheme: dark;
  --bg: #0c100d;
  --surface: #141a15;
  --surface-2: #1a211b;
  --border: #2b352d;
  --text: #f3f7f1;
  --muted: #a1ada0;
  --accent: #adff62;
  --accent-2: #70d92e;
  --accent-ink: #10150d;
  --warning: #ffcc66;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 74% 4%, rgba(173, 255, 98, .1), transparent 27rem),
    var(--bg);
  font: 15px/1.7 Inter, "PingFang SC", "Microsoft YaHei", ui-sans-serif, system-ui, sans-serif;
}
a { color: inherit; text-decoration: none; }
.wrap { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(43, 53, 45, .8);
  background: rgba(12, 16, 13, .84);
  backdrop-filter: blur(18px);
}
.nav-inner { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 800; }
.brand img { width: 34px; height: 34px; border-radius: 10px; }
.brand small {
  padding: 2px 8px;
  border: 1px solid rgba(173, 255, 98, .35);
  border-radius: 999px;
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
}
.nav-links { display: flex; align-items: center; gap: 25px; color: var(--muted); font-size: 14px; }
.nav-links a:hover { color: var(--text); }
.nav-download { padding: 8px 14px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface); }

.hero {
  min-height: 650px;
  padding: 105px 0 85px;
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  gap: 75px;
  align-items: center;
}
.eyebrow, .kicker {
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .13em;
  text-transform: uppercase;
}
.eyebrow { display: flex; align-items: center; gap: 9px; }
.eyebrow span { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 16px var(--accent); }
h1 {
  margin: 18px 0 24px;
  font-size: clamp(45px, 6vw, 72px);
  line-height: 1.09;
  letter-spacing: -.055em;
}
h1 em { color: var(--accent); font-style: normal; }
.lead { max-width: 660px; margin: 0; color: var(--muted); font-size: 19px; }
.hero-actions { margin-top: 34px; display: flex; gap: 12px; flex-wrap: wrap; }
.button {
  display: inline-flex;
  min-height: 46px;
  padding: 11px 21px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  font-weight: 800;
}
.button:hover { border-color: #536458; background: var(--surface-2); }
.button.primary { color: var(--accent-ink); border-color: var(--accent); background: var(--accent); }
.button.primary:hover { background: #c1ff88; }
.hero-meta { margin-top: 23px; display: flex; gap: 18px; flex-wrap: wrap; color: var(--muted); font-size: 13px; }

.hero-visual { position: relative; min-height: 410px; display: grid; place-items: center; }
.visual-glow {
  position: absolute;
  width: 330px;
  height: 330px;
  border-radius: 50%;
  background: rgba(112, 217, 46, .18);
  filter: blur(70px);
}
.package-card {
  position: relative;
  width: min(100%, 420px);
  overflow: hidden;
  border: 1px solid #405044;
  border-radius: 22px;
  background: rgba(20, 26, 21, .94);
  box-shadow: 0 30px 80px rgba(0, 0, 0, .38);
  transform: none;
}
.package-head { padding: 21px; display: flex; align-items: center; gap: 13px; border-bottom: 1px solid var(--border); }
.package-head img { width: 44px; height: 44px; border-radius: 12px; }
.package-head strong, .package-head small { display: block; }
.package-head small { margin-top: 2px; color: var(--accent); font-size: 12px; }
.file-tree { padding: 17px 20px 22px; display: grid; gap: 4px; color: #dbe3d8; font: 13px/1.65 ui-monospace, SFMono-Regular, Menlo, monospace; }
.file-tree span { padding: 5px 8px; border-radius: 7px; }
.file-tree b { color: var(--muted); }
.file-tree .level { padding-left: 25px; }
.file-tree .level-2 { padding-left: 48px; color: var(--muted); }
.file-tree .active { color: var(--text); background: rgba(173, 255, 98, .1); }
.file-tree i {
  display: inline-grid;
  min-width: 25px;
  height: 20px;
  margin-right: 7px;
  place-items: center;
  border-radius: 4px;
  color: var(--accent);
  background: rgba(173, 255, 98, .12);
  font-size: 9px;
  font-style: normal;
}

.notice-section { padding: 0 0 25px; }
.notice {
  padding: 19px 22px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 18px;
  border: 1px solid rgba(255, 204, 102, .34);
  border-radius: 14px;
  background: rgba(255, 204, 102, .065);
}
.notice strong { color: var(--warning); }
.notice p { margin: 0; color: var(--muted); }
.notice a { color: var(--warning); white-space: nowrap; }

.section { padding: 88px 0; }
.section-heading { margin-bottom: 34px; display: flex; justify-content: space-between; gap: 40px; align-items: end; }
h2 { margin: 8px 0 0; font-size: clamp(30px, 4.2vw, 47px); line-height: 1.2; letter-spacing: -.04em; }
.section-heading p { max-width: 480px; margin: 0 0 5px; color: var(--muted); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
.feature-card {
  min-height: 205px;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: linear-gradient(145deg, var(--surface), rgba(20, 26, 21, .6));
}
.feature-card:hover { border-color: #48574b; transform: translateY(-2px); transition: .2s ease; }
.feature-card .icon { color: var(--accent); font: 12px/1 ui-monospace, monospace; }
.feature-card h3 { margin: 35px 0 8px; font-size: 18px; }
.feature-card p { margin: 0; color: var(--muted); }

.workflow-section { border-block: 1px solid var(--border); background: #101511; }
.workflow { margin-top: 38px; display: flex; align-items: stretch; gap: 11px; }
.workflow > i { align-self: center; color: #526055; font-style: normal; }
.workflow-step {
  min-width: 0;
  flex: 1;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
}
.workflow-step b { display: block; color: var(--accent); font-size: 12px; }
.workflow-step strong { display: block; margin-top: 22px; font-size: 18px; }
.workflow-step span { color: var(--muted); font-size: 13px; }

.trial-card {
  padding: 40px;
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 55px;
  border: 1px solid #455348;
  border-radius: 22px;
  background:
    radial-gradient(circle at 0 0, rgba(173, 255, 98, .08), transparent 28rem),
    var(--surface);
}
.trial-card p { color: var(--muted); }
.trial-rights { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.trial-rights div { padding: 18px; border: 1px solid var(--border); border-radius: 13px; background: rgba(12, 16, 13, .5); }
.trial-rights strong { display: block; color: var(--accent); font-size: 19px; }
.trial-rights span { display: block; margin-top: 4px; color: var(--muted); font-size: 13px; }

.privacy-section { background: #101511; border-top: 1px solid var(--border); }
.privacy-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 70px; }
.privacy-points p { margin: 0; padding: 18px 0; border-bottom: 1px solid var(--border); color: var(--muted); }
.privacy-points b { color: var(--text); }
.privacy-points a { display: inline-block; margin-top: 22px; color: var(--accent); font-weight: 750; }

.cta-section { padding: 70px 0; }
.cta { padding: 31px; display: flex; align-items: center; gap: 22px; border: 1px solid var(--border); border-radius: 18px; background: var(--surface); }
.cta img { width: 58px; height: 58px; border-radius: 15px; }
.cta div { flex: 1; }
.cta h2 { margin: 0; font-size: 25px; }
.cta p { margin: 4px 0 0; color: var(--muted); }

footer { padding: 36px 0; border-top: 1px solid var(--border); color: var(--muted); }
.footer-inner { display: grid; grid-template-columns: 1fr auto; gap: 18px; align-items: center; }
.footer-inner strong, .footer-inner span { display: block; }
.footer-inner strong { color: var(--text); }
.footer-inner span { font-size: 12px; }
.footer-links { display: flex; gap: 18px; font-size: 13px; }
.footer-links a:hover { color: var(--accent); }
.footer-inner small { grid-column: 1 / -1; padding-top: 17px; border-top: 1px solid var(--border); }

.document-page { padding: 70px 0 95px; }
.document-shell { max-width: 820px; }
.document-shell h1 { font-size: clamp(38px, 6vw, 58px); }
.document-shell .intro { color: var(--muted); font-size: 17px; }
.document-section { padding: 25px 0; border-top: 1px solid var(--border); }
.document-section h2 { margin-bottom: 12px; font-size: 25px; }
.document-section h3 { margin: 22px 0 8px; }
.document-section p, .document-section li { color: var(--muted); }
.document-section a { color: var(--accent); }
.document-section code, .hash {
  overflow-wrap: anywhere;
  color: #dfffc1;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.download-panel {
  margin: 30px 0;
  padding: 28px;
  border: 1px solid #455348;
  border-radius: 18px;
  background: var(--surface);
}
.download-panel h2 { margin-top: 0; }
.download-panel .button { margin: 12px 0 17px; }
.platform-label {
  display: inline-flex;
  margin-bottom: 10px;
  padding: 5px 9px;
  border: 1px solid rgba(162, 255, 76, .35);
  border-radius: 999px;
  color: var(--accent);
  background: rgba(162, 255, 76, .07);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .04em;
}
.panel-note { margin: 0; color: var(--muted); font-size: 14px; }
.specs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.specs div { padding: 13px; border: 1px solid var(--border); border-radius: 10px; background: rgba(12, 16, 13, .45); }
.specs strong, .specs span { display: block; }
.specs strong { font-size: 12px; color: var(--muted); }
.specs span { margin-top: 3px; }
.warning-box { padding: 17px 19px; border-left: 3px solid var(--warning); background: rgba(255, 204, 102, .06); color: var(--muted); }
.warning-box b { color: var(--warning); }
.checksum {
  margin-top: 18px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(12, 16, 13, .42);
}
.checksum summary {
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-weight: 750;
  list-style: none;
}
.checksum summary::-webkit-details-marker { display: none; }
.checksum summary::after {
  content: "＋";
  margin-left: auto;
  color: var(--accent);
  font-size: 18px;
  line-height: 1;
}
.checksum[open] summary {
  border-bottom: 1px solid var(--border);
}
.checksum[open] summary::after { content: "－"; }
.checksum summary small {
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
}
.checksum-body { padding: 16px; }
.checksum-body > p:first-child { margin-top: 0; }
.checksum-value {
  padding: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: #0a0e0b;
}
.checksum-value code {
  min-width: 0;
  flex: 1;
  overflow-wrap: anywhere;
  color: #dfffc1;
  font: 12px/1.6 ui-monospace, SFMono-Regular, Menlo, monospace;
}
.copy-checksum {
  min-height: 32px;
  padding: 7px 12px;
  border: 1px solid #455348;
  border-radius: 8px;
  color: var(--text);
  background: var(--surface-2);
  cursor: pointer;
  font: 700 12px/1 Inter, "PingFang SC", "Microsoft YaHei", ui-sans-serif, system-ui, sans-serif;
}
.copy-checksum:hover { border-color: var(--accent); color: var(--accent); }
.checksum-links { margin: 11px 0 0; font-size: 13px; }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; min-height: auto; gap: 25px; }
  .hero-visual { min-height: 350px; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .workflow { display: grid; grid-template-columns: 1fr 1fr; }
  .workflow > i { display: none; }
  .trial-card, .privacy-grid { grid-template-columns: 1fr; gap: 30px; }
}
@media (max-width: 680px) {
  .wrap { width: min(100% - 28px, 1120px); }
  .nav-links a:not(.nav-download) { display: none; }
  .hero { padding: 72px 0 55px; }
  .hero-visual { min-height: 310px; }
  .package-card { transform: none; }
  .notice { grid-template-columns: 1fr; }
  .section { padding: 68px 0; }
  .section-heading { display: block; }
  .section-heading p { margin-top: 15px; }
  .feature-grid, .workflow, .trial-rights, .specs { grid-template-columns: 1fr; }
  .trial-card { padding: 27px; }
  .cta { align-items: flex-start; flex-wrap: wrap; }
  .cta div { flex-basis: calc(100% - 85px); }
  .cta .button { width: 100%; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-links { flex-wrap: wrap; }
  .checksum-value { align-items: flex-start; flex-direction: column; }
  .copy-checksum { align-self: flex-end; }
}