:root {
  color-scheme: light;
  --blue: #0f6bff;
  --blue-soft: #eaf3ff;
  --blue-dark: #064cc4;
  --green: #13b981;
  --green-soft: #eafaf3;
  --ink: #101828;
  --muted: #667085;
  --line: #d9e2ef;
  --soft-line: #edf2f7;
  --surface: #ffffff;
  --soft: #f7f8fb;
  --softer: #fbfcff;
  --shadow: 0 18px 48px rgba(15, 33, 61, 0.10);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: #f8fbff;
  color: var(--ink);
  font-family: "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}

.particle-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.site-header,
main,
.site-footer {
  position: relative;
  z-index: 1;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 32px;
  min-height: 76px;
  padding: 0 48px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(18px);
}

.brand,
.site-footer div {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.brand img,
.site-footer img {
  width: 38px;
  height: 38px;
  border-radius: 8px;
}

.brand span,
.site-footer strong {
  font-size: 21px;
  font-weight: 800;
}

.brand small {
  color: var(--blue);
  font-size: 14px;
  font-weight: 700;
}

.site-nav {
  display: flex;
  justify-content: center;
  gap: 30px;
  color: #344054;
  font-size: 14px;
}

.site-nav a {
  padding: 28px 0;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover {
  color: var(--blue);
  border-bottom-color: var(--blue);
}

.header-cta,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 800;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.header-cta:hover,
.btn:hover {
  transform: translateY(-1px);
}

.header-cta,
.btn.primary {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 12px 24px rgba(15, 107, 255, 0.18);
}

.btn.purchase {
  background: var(--green);
  color: #fff;
  box-shadow: 0 12px 24px rgba(19, 185, 129, 0.18);
}

.btn.full {
  width: 100%;
}

.hero {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(420px, 0.85fr) minmax(560px, 1.15fr);
  gap: 64px;
  align-items: center;
  min-height: 748px;
  padding: 82px 48px 92px;
  background:
    linear-gradient(90deg, rgba(15, 107, 255, 0.055) 1px, transparent 1px),
    linear-gradient(180deg, rgba(15, 107, 255, 0.055) 1px, transparent 1px),
    radial-gradient(circle at 73% 30%, rgba(15, 107, 255, 0.18), transparent 28%),
    radial-gradient(circle at 18% 78%, rgba(19, 185, 129, 0.13), transparent 26%),
    linear-gradient(180deg, #ffffff 0%, #f3f8ff 100%);
  background-size: 56px 56px, 56px 56px, auto, auto;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 170px;
  background: linear-gradient(180deg, rgba(248, 251, 255, 0), #f7f8fb);
  pointer-events: none;
}

.hero-copy,
.hero-product {
  position: relative;
  z-index: 1;
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(20px);
  opacity: 0.55;
  pointer-events: none;
}

.hero-glow-blue {
  right: 8%;
  top: 15%;
  width: 260px;
  height: 260px;
  background: rgba(15, 107, 255, 0.17);
}

.hero-glow-green {
  left: 18%;
  bottom: 14%;
  width: 210px;
  height: 210px;
  background: rgba(19, 185, 129, 0.14);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 24px;
  font-size: clamp(54px, 6.1vw, 88px);
  line-height: 0.98;
  letter-spacing: 0;
  white-space: nowrap;
}

.hero-subtitle {
  max-width: 620px;
  color: #344054;
  font-size: 24px;
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 34px;
}

.trust-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  max-width: 580px;
  margin-top: 34px;
}

.trust-row span {
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
  color: #475467;
  font-size: 13px;
  font-weight: 700;
  backdrop-filter: blur(10px);
}

.hero-product {
  position: relative;
  min-height: 520px;
  perspective: 1200px;
}

.product-orbit {
  position: absolute;
  inset: 8% -2% 8% 7%;
  border: 1px solid rgba(15, 107, 255, 0.12);
  border-radius: 50%;
  transform: rotate(-8deg);
}

.product-orbit::before,
.product-orbit::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 8px rgba(15, 107, 255, 0.1);
}

.product-orbit::before {
  right: 18%;
  top: 3%;
  width: 8px;
  height: 8px;
}

.product-orbit::after {
  left: 14%;
  bottom: 10%;
  width: 6px;
  height: 6px;
  background: var(--green);
  box-shadow: 0 0 0 8px rgba(19, 185, 129, 0.1);
}

.product-shot {
  position: absolute;
  left: 1%;
  right: -3%;
  top: 8%;
  overflow: hidden;
  border-radius: 16px;
  filter: drop-shadow(0 34px 48px rgba(15, 33, 61, 0.2));
  transform: rotateY(-7deg) rotateX(3deg);
  transform-origin: center;
  animation: floatProduct 6s ease-in-out infinite;
}

.product-shot img {
  display: block;
  width: 100%;
  height: auto;
}

@keyframes floatProduct {
  0%,
  100% {
    transform: rotateY(-7deg) rotateX(3deg) translateY(0);
  }
  50% {
    transform: rotateY(-5deg) rotateX(2deg) translateY(-10px);
  }
}

.floating-card {
  position: absolute;
  min-width: 156px;
  padding: 15px 16px;
  border: 1px solid rgba(217, 226, 239, 0.9);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 18px 42px rgba(16, 24, 40, 0.13);
  backdrop-filter: blur(16px);
}

.floating-card strong,
.floating-card span {
  display: block;
}

.floating-card span {
  margin-top: 5px;
  color: var(--muted);
  font-size: 12px;
}

.floating-card .card-icon {
  display: inline-flex;
  width: 30px;
  height: 30px;
  align-items: center;
  justify-content: center;
  margin: 0 0 10px;
  border-radius: 8px;
  background: var(--blue-soft);
  color: var(--blue);
  font-size: 12px;
  font-weight: 900;
}

.card-left {
  left: -4px;
  bottom: 96px;
}

.card-right {
  right: 0;
  top: 70px;
}

.card-bottom {
  right: 116px;
  bottom: 8px;
}

.section {
  padding: 82px 48px;
}

.section:nth-child(even) {
  background: var(--soft);
}

.section-head {
  max-width: 760px;
  margin: 0 auto 34px;
  text-align: center;
}

.section-head h2,
.video-copy h2,
.cta-section h2 {
  margin-bottom: 12px;
  font-size: clamp(34px, 4vw, 54px);
  line-height: 1.08;
}

.section-head p,
.video-copy p,
.cta-section p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
}

.download-grid,
.cta-section {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  max-width: 1120px;
  margin: 0 auto;
}

.download-card {
  display: grid;
  grid-template-columns: 128px 1fr;
  gap: 26px;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 12px 32px rgba(16, 24, 40, 0.06);
}

.platform-mark {
  align-self: center;
  width: 94px;
  height: 94px;
  border-radius: 8px;
  background: var(--blue);
}

.windows-mark {
  background:
    linear-gradient(90deg, transparent 46%, #fff 46%, #fff 54%, transparent 54%),
    linear-gradient(180deg, transparent 46%, #fff 46%, #fff 54%, transparent 54%),
    var(--blue);
}

.mac-mark {
  background:
    radial-gradient(circle at 50% 34%, #111 0 16px, transparent 17px),
    linear-gradient(180deg, transparent 42%, #111 42% 68%, transparent 69%),
    #f2f4f7;
}

.download-card h3 {
  margin-bottom: 8px;
  font-size: 26px;
}

.download-card p {
  color: var(--muted);
}

dl {
  display: grid;
  gap: 10px;
  margin: 18px 0 22px;
}

dl div {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--soft-line);
}

dt {
  color: var(--muted);
}

dd {
  margin: 0;
  font-weight: 800;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  max-width: 1180px;
  margin: 0 auto;
}

.feature-grid article,
.step-line article,
.buy-card,
.contact-card,
.video-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 12px 34px rgba(16, 24, 40, 0.04);
}

.feature-grid article {
  min-height: 214px;
  padding: 26px;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.feature-grid article:hover,
.download-card:hover,
.step-line article:hover {
  transform: translateY(-3px);
  border-color: rgba(15, 107, 255, 0.28);
  box-shadow: 0 18px 42px rgba(15, 33, 61, 0.09);
}

.feature-grid span {
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
}

.feature-grid h3,
.step-line h3 {
  margin: 18px 0 10px;
  font-size: 22px;
}

.feature-grid p,
.step-line p {
  color: var(--muted);
  line-height: 1.7;
}

.step-line {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 14px;
}

.step-line article {
  min-height: 206px;
  padding: 22px;
}

.step-line b {
  display: inline-flex;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
}

.video-card {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 38px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 32px;
}

.video-frame {
  position: relative;
  min-height: 360px;
  overflow: hidden;
  border-radius: 8px;
  background: #d9ecff;
  color: #fff;
  text-align: center;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.46);
}

.video-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-frame button {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 86px;
  height: 86px;
  border: 0;
  border-radius: 50%;
  background: #fff;
  cursor: pointer;
  transform: translate(-50%, -50%);
  box-shadow: 0 18px 44px rgba(15, 33, 61, 0.18);
}

.video-frame button::after {
  content: "";
  display: block;
  width: 0;
  height: 0;
  margin: 29px 0 0 34px;
  border-top: 14px solid transparent;
  border-bottom: 14px solid transparent;
  border-left: 21px solid var(--blue);
}

.video-copy {
  align-self: center;
}

.video-copy ul {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 24px 0 0;
  list-style: none;
}

.video-copy li {
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: #344054;
  font-weight: 700;
}

.cta-section {
  align-items: stretch;
}

.buy-card,
.contact-card {
  padding: 34px;
}

.buy-card {
  background: linear-gradient(180deg, #f4fff9, #fff);
  border-color: #b9ead5;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 24px 0;
}

.contact-grid div {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--softer);
}

.contact-grid strong,
.contact-grid span {
  display: block;
}

.contact-grid span {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 48px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

@media (max-width: 1120px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .site-nav {
    display: none;
  }

  .hero,
  .video-card {
    grid-template-columns: 1fr;
  }

  .hero-product {
    min-height: 520px;
  }

  .floating-card {
    position: absolute;
  }

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

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

@media (max-width: 760px) {
  .site-header,
  .hero,
  .section,
  .site-footer {
    padding-left: 20px;
    padding-right: 20px;
  }

  .site-header {
    min-height: 68px;
  }

  .brand small,
  .header-cta {
    display: none;
  }

  .hero {
    min-height: 0;
    padding-top: 48px;
  }

  h1 {
    font-size: 45px;
  }

  .hero-subtitle {
    font-size: 18px;
  }

  .trust-row,
  .download-grid,
  .feature-grid,
  .step-line,
  .cta-section,
  .contact-grid {
    grid-template-columns: 1fr;
  }

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

  .download-card {
    padding: 24px;
  }

  .hero-product {
    min-height: 345px;
  }

  .product-shot {
    left: -12px;
    right: -18px;
    top: 118px;
    transform: none;
    animation: none;
  }

  .product-orbit {
    inset: 8% 0 12%;
  }

  .card-left,
  .card-right,
  .card-bottom {
    position: relative;
    left: auto;
    right: auto;
    top: auto;
    bottom: auto;
    display: inline-block;
    min-width: 0;
    width: calc(50% - 8px);
    margin: 8px 8px 0 0;
    vertical-align: top;
  }

  .card-bottom {
    width: calc(50% - 8px);
  }

  .video-frame {
    min-height: 260px;
  }

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