:root {
  --bg: #050b14;
  --bg-soft: #071321;
  --panel: rgba(10, 26, 42, 0.76);
  --panel-solid: #0b1a2a;
  --line: rgba(146, 196, 220, 0.14);
  --line-strong: rgba(105, 233, 226, 0.32);
  --text: #f2f8f8;
  --muted: #92a9b5;
  --cyan: #69e9e2;
  --cyan-deep: #1bb9b0;
  --gold: #f6c75e;
  --gold-deep: #9f6514;
  --purple: #c7a8ff;
  --shell: min(1320px, calc(100% - 64px));
  --radius: 22px;
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.42);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 22% 18%, rgba(13, 151, 164, 0.08), transparent 26%),
    var(--bg);
  color: var(--text);
  font-family:
    "Microsoft YaHei UI", "PingFang SC", "Noto Sans CJK SC", system-ui, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  opacity: 0.22;
  background:
    radial-gradient(circle at 15% 30%, rgba(105, 233, 226, 0.16) 0 1px, transparent 1.5px),
    radial-gradient(circle at 75% 18%, rgba(246, 199, 94, 0.13) 0 1px, transparent 1.5px);
  background-size: 79px 83px, 113px 107px;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

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

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

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  padding: 10px 16px;
  border-radius: 8px;
  background: var(--cyan);
  color: #03100f;
  transform: translateY(-160%);
}

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

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.site-header {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 50;
  border-bottom: 1px solid transparent;
  transition: 220ms ease;
}

.site-header.is-scrolled {
  border-color: var(--line);
  background: rgba(5, 11, 20, 0.84);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(18px);
}

.nav-wrap {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

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

.brand-mark {
  position: relative;
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid rgba(246, 199, 94, 0.55);
  background: linear-gradient(145deg, #063457, #0b1727);
  box-shadow:
    inset 0 0 18px rgba(70, 187, 255, 0.35),
    0 0 20px rgba(21, 156, 227, 0.2);
  transform: rotate(45deg);
}

.brand-mark::before,
.brand-mark::after,
.brand-mark i {
  position: absolute;
  content: "";
}

.brand-mark::before {
  inset: 6px;
  border: 1px solid rgba(105, 233, 226, 0.72);
}

.brand-mark::after {
  width: 14px;
  height: 14px;
  background: linear-gradient(135deg, #fff9ce, #4ff5ff 52%, #2771ec);
  clip-path: polygon(50% 0, 61% 39%, 100% 50%, 61% 61%, 50% 100%, 39% 61%, 0 50%, 39% 39%);
  filter: drop-shadow(0 0 5px rgba(105, 233, 226, 0.9));
}

.brand-copy {
  display: grid;
  line-height: 1;
}

.brand-copy strong {
  font-size: 17px;
  letter-spacing: 0.09em;
}

.brand-copy small {
  margin-top: 6px;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 9px;
  letter-spacing: 0.25em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 34px;
  margin-left: auto;
  color: #b7c8d0;
  font-size: 14px;
}

.nav-links a {
  position: relative;
}

.nav-links a::after {
  position: absolute;
  right: 0;
  bottom: -9px;
  left: 0;
  height: 1px;
  background: var(--cyan);
  content: "";
  transform: scaleX(0);
  transition: transform 180ms ease;
}

.nav-links a:hover {
  color: var(--text);
}

.nav-links a:hover::after {
  transform: scaleX(1);
}

.nav-download {
  padding: 10px 17px;
  border: 1px solid rgba(105, 233, 226, 0.38);
  border-radius: 9px;
  background: rgba(105, 233, 226, 0.07);
  color: var(--cyan);
  font-size: 13px;
  font-weight: 700;
  transition: 180ms ease;
}

.nav-download:hover {
  border-color: var(--cyan);
  background: rgba(105, 233, 226, 0.14);
  transform: translateY(-2px);
}

.hero {
  position: relative;
  min-height: 820px;
  overflow: hidden;
  padding-top: 76px;
  border-bottom: 1px solid var(--line);
  isolation: isolate;
}

.hero::before {
  position: absolute;
  top: 0;
  right: 0;
  z-index: -2;
  width: 62%;
  height: 100%;
  background: linear-gradient(90deg, var(--bg) 2%, rgba(5, 11, 20, 0.1) 48%, rgba(8, 25, 44, 0.18));
  content: "";
}

.hero-grid,
.cta-grid {
  position: absolute;
  inset: 0;
  z-index: -3;
  opacity: 0.14;
  background-image:
    linear-gradient(rgba(105, 233, 226, 0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(105, 233, 226, 0.15) 1px, transparent 1px);
  background-size: 62px 62px;
  mask-image: linear-gradient(to bottom, black, transparent 86%);
}

.hero-orb {
  position: absolute;
  z-index: -2;
  border-radius: 50%;
  filter: blur(4px);
  pointer-events: none;
}

.hero-orb-cyan {
  top: 4%;
  right: 12%;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(0, 171, 255, 0.17), transparent 69%);
}

.hero-orb-gold {
  right: -180px;
  bottom: -170px;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(246, 159, 44, 0.09), transparent 68%);
}

.hero-layout {
  display: grid;
  min-height: 660px;
  grid-template-columns: minmax(0, 0.88fr) minmax(530px, 1.12fr);
  align-items: center;
  gap: 38px;
  padding-top: 48px;
}

.hero-copy {
  position: relative;
  z-index: 5;
  padding-bottom: 30px;
}

.eyebrow,
.kicker {
  color: var(--cyan);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 24px;
  padding: 7px 11px;
  border: 1px solid rgba(105, 233, 226, 0.22);
  border-radius: 999px;
  background: rgba(105, 233, 226, 0.06);
}

.live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(105, 233, 226, 0.1), 0 0 14px var(--cyan);
}

.hero h1 {
  max-width: 640px;
  margin: 0;
  font-size: clamp(54px, 6.1vw, 88px);
  font-weight: 900;
  letter-spacing: -0.065em;
  line-height: 1.06;
}

.hero h1 span {
  background: linear-gradient(105deg, #fff6c7 4%, var(--gold) 38%, #b9f8f5 90%);
  background-clip: text;
  color: transparent;
  -webkit-background-clip: text;
}

.hero-lead {
  max-width: 570px;
  margin: 27px 0 0;
  color: #adc0c9;
  font-size: 17px;
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 34px;
}

.primary-button {
  display: inline-flex;
  min-width: 225px;
  min-height: 64px;
  align-items: center;
  justify-content: center;
  gap: 13px;
  padding: 10px 18px;
  border: 1px solid #ffd778;
  border-radius: 12px;
  background: linear-gradient(135deg, #ffe18a, #e9a62f 80%);
  box-shadow:
    0 14px 32px rgba(212, 139, 29, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.75);
  color: #201504;
  font-size: 17px;
  font-weight: 900;
  letter-spacing: 0.02em;
  transition: 180ms ease;
}

.primary-button:hover {
  box-shadow:
    0 18px 44px rgba(212, 139, 29, 0.32),
    0 0 0 4px rgba(246, 199, 94, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.85);
  transform: translateY(-3px);
}

.primary-button span:not(.windows-icon) {
  display: grid;
  line-height: 1.15;
}

.primary-button small {
  margin-bottom: 4px;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.1em;
  opacity: 0.68;
}

.primary-button b {
  margin-left: 7px;
  font-size: 20px;
}

.windows-icon {
  display: grid;
  width: 22px;
  height: 22px;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  transform: perspective(30px) rotateY(-7deg);
}

.windows-icon i {
  display: block;
  background: #201504;
}

.secondary-button {
  display: inline-flex;
  min-height: 64px;
  align-items: center;
  padding: 0 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: #c4d4da;
  font-size: 14px;
  font-weight: 700;
  transition: 180ms ease;
}

.secondary-button:hover {
  border-color: var(--line-strong);
  background: rgba(105, 233, 226, 0.04);
  color: var(--text);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 25px;
  color: #7f9aa6;
  font-size: 12px;
}

.hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-meta i {
  color: var(--cyan);
  font-style: normal;
}

.hero-visual {
  position: relative;
  height: 620px;
}

.art-halo {
  position: absolute;
  inset: 8% 3% 7% 10%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(26, 121, 230, 0.29), transparent 68%);
  filter: blur(16px);
}

.brand-art {
  position: absolute;
  top: -2%;
  right: -16%;
  width: 108%;
  height: 108%;
  object-fit: cover;
  object-position: 50% 40%;
  opacity: 0.77;
  filter: saturate(0.94) contrast(1.04);
  mask-image: linear-gradient(to bottom, black 62%, transparent 98%);
}

.app-window-card {
  position: absolute;
  right: -1%;
  bottom: 12%;
  width: 97%;
  overflow: hidden;
  border: 1px solid rgba(105, 233, 226, 0.46);
  border-radius: 12px;
  background: #071321;
  box-shadow:
    0 25px 70px rgba(0, 0, 0, 0.72),
    0 0 0 6px rgba(6, 24, 39, 0.68),
    0 0 44px rgba(20, 201, 200, 0.13);
  transform: perspective(1000px) rotateX(1.5deg) rotateY(-3deg);
}

.app-window-card::after {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 28px rgba(50, 196, 230, 0.09);
  content: "";
  pointer-events: none;
}

.window-bar {
  display: flex;
  height: 35px;
  align-items: center;
  justify-content: space-between;
  padding: 0 13px;
  border-bottom: 1px solid rgba(105, 233, 226, 0.16);
  color: #b8c9d1;
  font-size: 10px;
}

.window-title {
  font-weight: 800;
  letter-spacing: 0.08em;
}

.window-status {
  display: flex;
  align-items: center;
  gap: 6px;
  color: #6bd9cb;
}

.window-status i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #6bd9cb;
  box-shadow: 0 0 8px #6bd9cb;
}

.app-window-card img {
  width: 100%;
  height: auto;
}

.floating-chip {
  position: absolute;
  display: grid;
  min-width: 132px;
  padding: 11px 14px;
  border: 1px solid rgba(168, 206, 226, 0.17);
  border-radius: 11px;
  background: rgba(5, 16, 28, 0.82);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.38);
  backdrop-filter: blur(12px);
}

.floating-chip span {
  color: #75919e;
  font-size: 9px;
  letter-spacing: 0.12em;
}

.floating-chip strong {
  margin-top: 3px;
  font-size: 13px;
}

.chip-one {
  top: 25%;
  left: 0;
  border-color: rgba(105, 233, 226, 0.28);
  animation: float 5s ease-in-out infinite;
}

.chip-two {
  top: 40%;
  right: -3%;
  border-color: rgba(246, 199, 94, 0.25);
  animation: float 5.7s ease-in-out -1.5s infinite;
}

.trust-strip {
  position: relative;
  z-index: 5;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
}

.trust-strip div {
  display: flex;
  min-height: 83px;
  align-items: center;
  justify-content: center;
  gap: 13px;
  border-right: 1px solid var(--line);
  color: #91a8b3;
  font-size: 13px;
}

.trust-strip div:first-child {
  border-left: 1px solid var(--line);
}

.trust-strip strong {
  color: var(--gold);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 10px;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-9px); }
}

.section {
  position: relative;
  padding: 112px 0;
}

.section-heading {
  display: grid;
  grid-template-columns: 1fr 0.78fr;
  align-items: end;
  gap: 80px;
  margin-bottom: 54px;
}

.kicker {
  margin: 0 0 15px;
}

.section h2,
.final-cta h2 {
  margin: 0;
  font-size: clamp(36px, 4.2vw, 56px);
  letter-spacing: -0.045em;
  line-height: 1.17;
}

.section-heading > p,
.showcase-copy > p:not(.kicker),
.privacy-card > div > p:not(.kicker),
.faq-heading > p:not(.kicker) {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.9;
}

.feature-grid {
  display: grid;
  grid-template-columns: 1.14fr 0.86fr 0.86fr 1.14fr;
  gap: 14px;
}

.feature-card {
  position: relative;
  min-height: 330px;
  overflow: hidden;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(145deg, rgba(16, 38, 58, 0.8), rgba(7, 18, 31, 0.84)),
    var(--panel);
  transition: 220ms ease;
}

.feature-card::before {
  position: absolute;
  top: -100px;
  left: -80px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(41, 190, 210, 0.09);
  filter: blur(40px);
  content: "";
}

.feature-card:hover {
  border-color: rgba(105, 233, 226, 0.28);
  transform: translateY(-5px);
}

.feature-index {
  position: absolute;
  top: 23px;
  right: 25px;
  color: #4c6672;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 11px;
}

.feature-icon {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border: 1px solid rgba(105, 233, 226, 0.26);
  border-radius: 12px;
  background: rgba(105, 233, 226, 0.06);
  color: var(--cyan);
  font-size: 23px;
}

.feature-card h3 {
  margin: 28px 0 12px;
  font-size: 20px;
  letter-spacing: -0.02em;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.85;
}

.mini-ranking {
  display: grid;
  gap: 8px;
  margin-top: 27px;
}

.mini-ranking span {
  display: flex;
  align-items: center;
  gap: 9px;
}

.mini-ranking i {
  position: relative;
  display: block;
  width: var(--rank);
  height: 4px;
  overflow: hidden;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--cyan-deep), var(--cyan));
  box-shadow: 0 0 10px rgba(105, 233, 226, 0.22);
}

.mini-ranking b {
  color: #92abb6;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 9px;
}

.compact-window {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-top: 30px;
  padding: 10px;
  border: 1px solid rgba(105, 233, 226, 0.26);
  border-radius: 9px;
  background: #06111e;
}

.compact-window span {
  margin-right: 4px;
  color: var(--cyan);
  font-size: 9px;
  font-weight: 800;
}

.compact-window i {
  width: 27px;
  height: 27px;
  border: 1px solid #244157;
  border-radius: 5px;
  background: linear-gradient(135deg, #20394f, #101f31);
}

.showcase-section {
  overflow: hidden;
  border-block: 1px solid var(--line);
  background:
    radial-gradient(circle at 78% 50%, rgba(125, 86, 219, 0.09), transparent 36%),
    #060e19;
}

.showcase-layout {
  display: grid;
  grid-template-columns: 0.68fr 1.32fr;
  align-items: center;
  gap: 70px;
}

.showcase-copy h2 {
  margin-bottom: 26px;
}

.check-list {
  display: grid;
  gap: 0;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  color: #bfd0d6;
  font-size: 13px;
}

.check-list li span {
  color: var(--gold);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 9px;
}

.showcase-frame {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(192, 171, 255, 0.27);
  border-radius: 18px;
  background: #08111d;
  box-shadow:
    0 35px 90px rgba(0, 0, 0, 0.5),
    0 0 80px rgba(94, 76, 204, 0.08);
}

.showcase-frame::before {
  position: absolute;
  inset: -1px;
  z-index: 2;
  border: 1px solid rgba(105, 233, 226, 0.08);
  border-radius: inherit;
  content: "";
  pointer-events: none;
}

.frame-topbar {
  display: grid;
  height: 45px;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 16px;
  border-bottom: 1px solid var(--line);
  color: #7d959f;
  font-size: 9px;
}

.frame-topbar span {
  display: flex;
  gap: 5px;
}

.frame-topbar span i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #2a3e4d;
}

.frame-topbar b {
  letter-spacing: 0.14em;
}

.frame-topbar em {
  justify-self: end;
  color: var(--cyan);
  font-style: normal;
}

.showcase-image-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 1466 / 791;
  background: #050b13;
}

.showcase-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.86) contrast(1.04);
}

.scan-line {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(105, 233, 226, 0.9), transparent);
  box-shadow: 0 0 12px rgba(105, 233, 226, 0.65);
  animation: scan 4.8s ease-in-out infinite;
}

@keyframes scan {
  0%, 12% { top: 0; opacity: 0; }
  25% { opacity: 1; }
  80% { top: 100%; opacity: 1; }
  100% { top: 100%; opacity: 0; }
}

.showcase-frame figcaption {
  padding: 12px 16px;
  color: #637c88;
  font-size: 9px;
  letter-spacing: 0.08em;
  text-align: center;
}

.privacy-section {
  padding-bottom: 0;
}

.privacy-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 34px;
  padding: 42px 48px;
  border: 1px solid rgba(105, 233, 226, 0.2);
  border-radius: var(--radius);
  background:
    linear-gradient(120deg, rgba(11, 39, 54, 0.8), rgba(7, 20, 33, 0.92)),
    var(--panel-solid);
}

.privacy-card h2 {
  margin-bottom: 15px;
  font-size: clamp(30px, 3vw, 42px);
}

.privacy-seal {
  display: grid;
  width: 94px;
  height: 94px;
  place-items: center;
  border: 1px solid rgba(105, 233, 226, 0.3);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(105, 233, 226, 0.11), transparent 68%);
  box-shadow: inset 0 0 0 8px rgba(105, 233, 226, 0.02);
}

.privacy-seal span {
  display: grid;
  width: 53px;
  height: 53px;
  place-items: center;
  border: 1px solid rgba(105, 233, 226, 0.42);
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.12em;
  transform: rotate(45deg);
}

.privacy-seal span::first-letter {
  transform: rotate(-45deg);
}

.privacy-points {
  display: grid;
  gap: 10px;
  min-width: 170px;
  color: #a9bec7;
  font-size: 12px;
}

.privacy-points span {
  display: flex;
  align-items: center;
  gap: 8px;
}

.privacy-points i {
  color: var(--cyan);
  font-style: normal;
}

.center-heading {
  max-width: 700px;
  margin: 0 auto 52px;
  text-align: center;
}

.steps-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.steps-grid::before {
  position: absolute;
  top: 86px;
  right: 20%;
  left: 20%;
  z-index: -1;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(105, 233, 226, 0.32), transparent);
  content: "";
}

.step-card {
  position: relative;
  min-height: 290px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(150deg, rgba(14, 31, 48, 0.78), rgba(7, 17, 29, 0.88));
  text-align: center;
}

.step-number {
  position: absolute;
  top: 20px;
  left: 22px;
  color: #46616e;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 10px;
}

.step-symbol {
  display: grid;
  width: 65px;
  height: 65px;
  margin: 26px auto;
  place-items: center;
  border: 1px solid rgba(246, 199, 94, 0.26);
  border-radius: 50%;
  background: rgba(246, 199, 94, 0.06);
  color: var(--gold);
  font-size: 25px;
  box-shadow: 0 0 35px rgba(246, 199, 94, 0.05);
}

.step-card h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.step-card p {
  max-width: 280px;
  margin: auto;
  color: var(--muted);
  font-size: 13px;
}

.faq-section {
  border-top: 1px solid var(--line);
  background: #060e18;
}

.faq-layout {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 90px;
}

.faq-heading h2 {
  margin-bottom: 22px;
}

.faq-list {
  border-top: 1px solid var(--line);
}

.faq-list details {
  border-bottom: 1px solid var(--line);
}

.faq-list summary {
  position: relative;
  display: flex;
  min-height: 75px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: #d7e4e8;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

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

.faq-list summary span {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
}

.faq-list summary span::before,
.faq-list summary span::after {
  position: absolute;
  top: 8px;
  left: 3px;
  width: 12px;
  height: 1px;
  background: var(--cyan);
  content: "";
  transition: 180ms ease;
}

.faq-list summary span::after {
  transform: rotate(90deg);
}

.faq-list details[open] summary span::after {
  transform: rotate(0);
}

.faq-list details p {
  max-width: 700px;
  margin: -4px 44px 25px 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.85;
}

.final-cta {
  position: relative;
  overflow: hidden;
  padding: 88px 0;
  background:
    radial-gradient(circle at 78% 50%, rgba(14, 170, 188, 0.14), transparent 30%),
    linear-gradient(105deg, #07131f, #091a28);
}

.final-cta::after {
  position: absolute;
  top: -180px;
  right: -110px;
  width: 450px;
  height: 450px;
  border: 1px solid rgba(246, 199, 94, 0.13);
  content: "";
  transform: rotate(45deg);
}

.final-cta-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 50px;
}

.final-cta h2 {
  margin-bottom: 12px;
}

.final-cta p:not(.kicker) {
  margin: 0;
  color: var(--muted);
}

.final-download {
  min-width: 245px;
}

.site-footer {
  padding: 44px 0 26px;
  border-top: 1px solid var(--line);
  background: #040a12;
}

.footer-main {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 30px;
}

.footer-main > p {
  margin: 0;
  color: #6f8792;
  font-size: 11px;
}

.footer-main > a:last-child {
  justify-self: end;
  color: var(--cyan);
  font-size: 12px;
}

.footer-brand .brand-mark {
  width: 31px;
  height: 31px;
}

.footer-brand .brand-copy strong {
  font-size: 14px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  margin-top: 32px;
  padding-top: 22px;
  border-top: 1px solid rgba(146, 196, 220, 0.08);
  color: #4f6671;
  font-size: 9px;
}

.footer-bottom p {
  margin: 0;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 600ms ease,
    transform 600ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

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

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

@media (max-width: 1040px) {
  .hero-layout {
    grid-template-columns: 0.94fr 1.06fr;
  }

  .hero-visual {
    height: 570px;
  }

  .brand-art {
    right: -28%;
    width: 125%;
  }

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

  .feature-card {
    min-height: 300px;
  }

  .showcase-layout {
    grid-template-columns: 1fr;
    gap: 45px;
  }

  .showcase-copy {
    max-width: 680px;
  }

  .privacy-card {
    grid-template-columns: auto 1fr;
  }

  .privacy-points {
    grid-column: 2;
    grid-template-columns: repeat(3, auto);
  }
}

@media (max-width: 780px) {
  :root {
    --shell: min(100% - 28px, 680px);
  }

  .nav-wrap {
    min-height: 68px;
  }

  .nav-links {
    display: none;
  }

  .nav-download {
    padding: 8px 12px;
    font-size: 11px;
  }

  .hero {
    min-height: auto;
    padding-top: 68px;
  }

  .hero-layout {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 12px;
    padding-top: 70px;
  }

  .hero-copy {
    text-align: center;
  }

  .eyebrow {
    margin-bottom: 20px;
  }

  .hero h1 {
    font-size: clamp(48px, 14vw, 70px);
  }

  .hero-lead {
    margin-inline: auto;
    font-size: 15px;
  }

  .hero-actions,
  .hero-meta {
    justify-content: center;
  }

  .hero-visual {
    height: 520px;
  }

  .brand-art {
    top: 0;
    right: -6%;
    width: 112%;
    height: 112%;
  }

  .app-window-card {
    right: 2%;
    bottom: 12%;
    width: 96%;
  }

  .floating-chip {
    display: none;
  }

  .trust-strip {
    grid-template-columns: repeat(2, 1fr);
  }

  .trust-strip div:nth-child(3),
  .trust-strip div:nth-child(4) {
    border-top: 1px solid var(--line);
  }

  .section {
    padding: 82px 0;
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 22px;
    margin-bottom: 40px;
  }

  .feature-grid,
  .steps-grid {
    grid-template-columns: 1fr;
  }

  .feature-card {
    min-height: 270px;
  }

  .privacy-card {
    grid-template-columns: 1fr;
    padding: 35px 27px;
    text-align: center;
  }

  .privacy-seal {
    margin-inline: auto;
  }

  .privacy-points {
    grid-column: auto;
    grid-template-columns: 1fr;
    justify-self: center;
    text-align: left;
  }

  .faq-layout {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .final-cta-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-main {
    grid-template-columns: 1fr auto;
  }

  .footer-main > p {
    display: none;
  }
}

@media (max-width: 520px) {
  .brand-copy small {
    display: none;
  }

  .brand-mark {
    width: 33px;
    height: 33px;
  }

  .hero-layout {
    padding-top: 52px;
  }

  .hero h1 {
    font-size: 47px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .primary-button,
  .secondary-button {
    width: min(100%, 330px);
  }

  .hero-meta {
    gap: 10px 16px;
  }

  .hero-visual {
    height: 400px;
  }

  .brand-art {
    top: -2%;
    right: -16%;
    width: 130%;
  }

  .app-window-card {
    bottom: 11%;
    transform: none;
  }

  .window-bar {
    height: 30px;
  }

  .trust-strip div {
    min-height: 68px;
    gap: 8px;
    font-size: 11px;
  }

  .section h2,
  .final-cta h2 {
    font-size: 34px;
  }

  .feature-card {
    min-height: auto;
    padding: 27px;
  }

  .showcase-frame {
    border-radius: 12px;
  }

  .frame-topbar {
    height: 36px;
  }

  .showcase-frame figcaption {
    display: none;
  }

  .step-card {
    min-height: 260px;
  }

  .final-cta {
    padding: 72px 0;
  }

  .footer-main {
    grid-template-columns: 1fr;
  }

  .footer-main > a:last-child {
    justify-self: start;
  }

  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }
}

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

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

  .reveal {
    opacity: 1;
    transform: none;
  }
}