:root {
  --bg: #0b1118;
  --bg-soft: #0e1720;
  --panel: #14212c;
  --panel-2: #17232d;
  --border: rgba(120, 160, 190, 0.16);
  --text: #e8f0f4;
  --text-2: #aabccb;
  --text-3: #7590a3;
  --accent: #55aef2;
  --accent-soft: rgba(85, 174, 242, 0.14);
  --green: #3fd68f;
  --green-soft: rgba(63, 214, 143, 0.12);
  --amber: #f5c04e;
  --purple: #a78bfa;
  --red: #f87171;
  --radius: 14px;
  --mono: 'SF Mono', ui-monospace, 'Cascadia Code', Menlo, Consolas, monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background:
    radial-gradient(1100px 500px at 75% -8%, rgba(85, 174, 242, 0.1), transparent 60%),
    radial-gradient(800px 420px at 12% 4%, rgba(63, 214, 143, 0.06), transparent 55%), var(--bg);
  color: var(--text);
  font-family:
    -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Nav ─────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 17, 24, 0.86);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: 14px;
  height: 60px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
  color: var(--text);
}
.brand:hover {
  text-decoration: none;
}
.brand img {
  width: 28px;
  height: 28px;
  border-radius: 7px;
}
.brand .tm {
  font-size: 10px;
  color: var(--text-3);
  font-weight: 500;
  margin-left: 2px;
}
.nav-links {
  display: flex;
  gap: 4px;
  margin-left: auto;
  align-items: center;
}
.nav-links a {
  color: var(--text-2);
  font-size: 14px;
  padding: 7px 12px;
  border-radius: 8px;
}
.nav-links a:hover {
  color: var(--text);
  background: var(--panel);
  text-decoration: none;
}
.nav-cta {
  background: var(--accent);
  color: #06121c !important;
  font-weight: 600;
  padding: 7px 16px !important;
  border-radius: 9px;
}
.nav-cta:hover {
  background: #7cc0f5;
}
.nav-toggle {
  display: none;
  margin-left: auto;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-2);
  border-radius: 8px;
  padding: 6px 11px;
  font-size: 16px;
  cursor: pointer;
}

/* ── Hero ────────────────────────────────────────── */
.hero {
  padding: 84px 0 64px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 52px;
  align-items: center;
}
.hero h1 {
  font-size: 44px;
  line-height: 1.22;
  letter-spacing: -0.5px;
  margin: 18px 0 14px;
}
.hero h1 .hl {
  color: var(--accent);
}
.hero .tagline {
  color: var(--text-2);
  font-size: 17px;
  margin-bottom: 26px;
}
.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 30px;
}
.badge {
  font-size: 12px;
  color: var(--text-2);
  border: 1px solid var(--border);
  background: var(--panel);
  padding: 4px 11px;
  border-radius: 999px;
}
.badge b {
  color: var(--green);
  font-weight: 600;
}
.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 10px;
  padding: 11px 22px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
}
.btn-primary {
  background: var(--accent);
  color: #06121c;
}
.btn-primary:hover {
  background: #7cc0f5;
  text-decoration: none;
  transform: translateY(-1px);
}
.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn-ghost:hover {
  border-color: var(--accent);
  text-decoration: none;
}
.hero-note {
  font-size: 12.5px;
  color: var(--text-3);
  margin-top: 14px;
}

/* Terminal mock (pure CSS, no fake screenshot) */
.term {
  background: #0d1620;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.45);
}
.term-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: #101b26;
  border-bottom: 1px solid var(--border);
}
.term-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}
.term-dot.r {
  background: #ff5f57;
}
.term-dot.y {
  background: #febc2e;
}
.term-dot.g {
  background: #28c840;
}
.term-title {
  font-size: 12px;
  color: var(--text-3);
  margin-left: 6px;
  font-family: var(--mono);
}
.term-body {
  padding: 16px 18px 18px;
  font-family: var(--mono);
  font-size: 12.8px;
  line-height: 1.8;
}
.term-body .p {
  color: var(--green);
}
.term-body .c {
  color: var(--text);
}
.term-body .dim {
  color: #93aab9;
}
.term-body .out {
  color: #c3d2dd;
}
.term-body .err {
  color: var(--red);
}
.term-body .mark {
  color: var(--amber);
}
.cursor {
  display: inline-block;
  width: 8px;
  height: 15px;
  background: var(--green);
  vertical-align: -2px;
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink {
  50% {
    opacity: 0;
  }
}

/* ── Sections ────────────────────────────────────── */
section {
  padding: 74px 0;
}
.section-alt {
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.section-head {
  max-width: 660px;
  margin-bottom: 40px;
}
.kicker {
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
}
.section-head h2 {
  font-size: 30px;
  margin: 10px 0 12px;
  letter-spacing: -0.3px;
}
.section-head p {
  color: var(--text-2);
  font-size: 15.5px;
}

.grid {
  display: grid;
  gap: 18px;
}
.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}
.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 22px 20px;
  transition:
    border-color 0.15s ease,
    transform 0.15s ease;
}
.card:hover {
  border-color: rgba(85, 174, 242, 0.45);
  transform: translateY(-2px);
}
.card .icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  font-size: 19px;
}
.card h3 {
  font-size: 16.5px;
  margin-bottom: 8px;
}
.card p {
  color: var(--text-2);
  font-size: 13.8px;
}
.card .tag {
  display: inline-block;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  margin-left: 8px;
  vertical-align: 2px;
}
.tag-free {
  background: var(--green-soft);
  color: var(--green);
}
.tag-pro {
  background: var(--accent-soft);
  color: var(--accent);
}

/* AI workflow */
.flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin: 34px 0 26px;
}
.flow-step {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  position: relative;
}
.flow-step .no {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 7px;
  padding: 2px 8px;
  display: inline-block;
  margin-bottom: 10px;
}
.flow-step h4 {
  font-size: 14.5px;
  margin-bottom: 6px;
}
.flow-step p {
  font-size: 12.8px;
  color: var(--text-2);
}
.confirm-card {
  background: #0d1620;
  border: 1px solid var(--border);
  border-radius: 12px;
  font-family: var(--mono);
  font-size: 13px;
  overflow: hidden;
}
.confirm-head {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 12px;
  color: var(--text-3);
}
.risk-pill {
  padding: 1px 9px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
}
.risk-mid {
  background: rgba(245, 192, 78, 0.14);
  color: var(--amber);
}
.risk-high {
  background: rgba(248, 113, 113, 0.15);
  color: var(--red);
}
.risk-safe {
  background: var(--green-soft);
  color: var(--green);
}
.confirm-cmd {
  padding: 14px 16px;
  color: var(--text);
  word-break: break-all;
}
.confirm-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0 16px 16px;
}
.confirm-actions span {
  font-size: 12px;
  padding: 5px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  color: var(--text-2);
}
.confirm-actions .danger {
  border-color: rgba(248, 113, 113, 0.4);
  color: var(--red);
}
.confirm-actions .primary {
  background: var(--accent);
  color: #06121c;
  border-color: var(--accent);
  font-weight: 600;
}
.confirm-actions .green {
  border-color: rgba(63, 214, 143, 0.4);
  color: var(--green);
}

.check-list {
  list-style: none;
  display: grid;
  gap: 10px;
  margin-top: 26px;
}
.check-list li {
  display: flex;
  gap: 10px;
  font-size: 14px;
  color: var(--text-2);
}
.check-list li::before {
  content: '✓';
  color: var(--green);
  font-weight: 700;
  flex-shrink: 0;
}
.check-list li b {
  color: var(--text);
  font-weight: 600;
}

/* Pricing */
.pricing {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.plan {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 26px;
  display: flex;
  flex-direction: column;
}
.plan.featured {
  border-color: rgba(85, 174, 242, 0.55);
  background: linear-gradient(180deg, rgba(85, 174, 242, 0.08), var(--panel) 45%);
  position: relative;
}
.plan .ribbon {
  position: absolute;
  top: -12px;
  left: 24px;
  background: var(--accent);
  color: #06121c;
  font-size: 11.5px;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: 999px;
}
.plan h3 {
  font-size: 17px;
}
.plan .price {
  font-size: 34px;
  font-weight: 700;
  margin: 12px 0 2px;
}
.plan .price small {
  font-size: 14px;
  color: var(--text-3);
  font-weight: 400;
}
.plan .price-note {
  font-size: 12.5px;
  color: var(--text-3);
  margin-bottom: 18px;
}
.plan ul {
  list-style: none;
  display: grid;
  gap: 9px;
  margin: 4px 0 24px;
  flex: 1;
}
.plan ul li {
  font-size: 13.8px;
  color: var(--text-2);
  display: flex;
  gap: 9px;
}
.plan ul li::before {
  content: '✓';
  color: var(--green);
  font-weight: 700;
  flex-shrink: 0;
}
.plan ul li.locked::before {
  content: '+';
  color: var(--accent);
}

/* Security */
.sec-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
.sec-item {
  display: flex;
  gap: 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
}
.sec-item .ic {
  font-size: 20px;
  flex-shrink: 0;
}
.sec-item h4 {
  font-size: 14.5px;
  margin-bottom: 4px;
}
.sec-item p {
  font-size: 13px;
  color: var(--text-2);
}

/* Tech + download */
.tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.tech-list span {
  font-family: var(--mono);
  font-size: 13px;
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 7px 14px;
  border-radius: 9px;
  color: var(--text-2);
}

.dl-box {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 30px;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 30px;
  align-items: center;
}
.dl-box h3 {
  font-size: 19px;
  margin-bottom: 6px;
}
.dl-box .meta {
  color: var(--text-3);
  font-size: 13px;
  margin-bottom: 18px;
}
.sha {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text-3);
  background: #0d1620;
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 10px 12px;
  word-break: break-all;
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin-top: 14px;
}
.sha button {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font-size: 11.5px;
  flex-shrink: 0;
  font-family: inherit;
}
.dl-note {
  font-size: 12.5px;
  color: var(--text-3);
  margin-top: 14px;
}
.dl-app {
  display: flex;
  align-items: center;
  gap: 18px;
  justify-content: center;
}
.dl-app img {
  width: 92px;
  height: 92px;
}
.dl-app .os {
  text-align: left;
}
.dl-app .os b {
  display: block;
  font-size: 15px;
}
.dl-app .os span {
  color: var(--text-3);
  font-size: 12.5px;
}

/* FAQ */
.faq-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
  margin-bottom: 10px;
  overflow: hidden;
}
.faq-item summary {
  cursor: pointer;
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: '+';
  color: var(--text-3);
  font-size: 18px;
}
.faq-item[open] summary::after {
  content: '−';
}
.faq-item .answer {
  padding: 0 20px 18px;
  color: var(--text-2);
  font-size: 14px;
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 40px 0 48px;
  color: var(--text-3);
  font-size: 13px;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: space-between;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 600;
}
.footer-brand img {
  width: 22px;
  height: 22px;
  border-radius: 6px;
}
footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
footer a {
  color: var(--text-3);
}
footer a:hover {
  color: var(--accent);
}

/* ── Responsive ──────────────────────────────────── */
@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .hero h1 {
    font-size: 34px;
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .flow {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing {
    grid-template-columns: 1fr;
  }
  .dl-box {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 640px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg-soft);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    padding: 10px 18px 16px;
    gap: 2px;
  }
  .nav-links.open {
    display: flex;
  }
  .nav-toggle {
    display: block;
  }
  .grid-3,
  .grid-2,
  .sec-grid {
    grid-template-columns: 1fr;
  }
  .flow {
    grid-template-columns: 1fr;
  }
  section {
    padding: 56px 0;
  }
}