*,
*::before,
*::after { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  overflow-x: hidden;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
    "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: #0d0d0d;
  background: #fff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button { border: none; background: none; font-family: inherit; cursor: pointer; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.wps-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 99;
  background: rgba(255,255,255,0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(13,13,13,0.06);
  transition: all .35s ease;
}
.header-wrapper {
  max-width: 1280px;
  margin: 0 auto;
  height: 64px;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.header-left { display: flex; align-items: center; gap: 12px; }
.header-left .logo { height: 28px; }
.header-left .line { width: 1px; height: 20px; background: rgba(13,13,13,0.18); }
.header-left .logo-ai { height: 22px; }
.header-left .logo-title { font-size: 14px; color: rgba(13,13,13,0.7); }
.header-left .logo-title-bold { font-weight: 600; color: #0d0d0d; }

.header-right { display: flex; align-items: center; gap: 24px; }
.header-right .nav-link {
  font-size: 14px;
  color: rgba(13,13,13,0.7);
  transition: color .2s;
}
.header-right .nav-link:hover { color: #ff3b30; }
.header-right .nav-link.active { color: #0d0d0d; font-weight: 600; }

.header-right .download-btn {
  position: relative;
  display: inline-block;
  width: 88px;
  height: 28px;
  cursor: pointer;
}
.header-right .download-btn img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transition: opacity .2s ease;
}
.header-right .download-btn .hover,
.header-right .download-btn .pressed { opacity: 0; }
.header-right .download-btn:hover .normal { opacity: 0; }
.header-right .download-btn:hover .hover { opacity: 1; }
.header-right .download-btn:active .hover { opacity: 0; }
.header-right .download-btn:active .pressed { opacity: 1; }

.container { width: 100%; }
.module {
  width: 100%;
  padding: 90px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  overflow: hidden;
}
.module-header {
  text-align: center;
  margin-bottom: 48px;
  max-width: 880px;
  position: relative;
  z-index: 2;
}
.module-header-title {
  font-size: 42px;
  font-weight: 700;
  line-height: 1.2;
  color: #0d0d0d;
  margin: 0 0 18px;
  letter-spacing: -0.5px;
}
.module-header-title .fresh {
  background: linear-gradient(135deg, #ff06a2 0%, #ff6225 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.module-header-subtitle {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(13,13,13,0.6);
  max-width: 760px;
  margin: 0 auto;
}

.w-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  transition: all .25s ease;
  cursor: pointer;
}
.w-button-normal {
  background: linear-gradient(135deg, #ff06a2 0%, #ff6225 100%);
  color: #fff;
  box-shadow: 0 6px 18px rgba(255,60,80,0.32);
}
.w-button-normal:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(255,60,80,0.4);
}
.w-button-ghost {
  border: 1px solid rgba(13,13,13,0.18);
  color: #0d0d0d;
  background: transparent;
}
.w-button-ghost:hover {
  border-color: #ff6225;
  color: #ff6225;
}

.module.dl-hero {
  padding-top: 140px;
  padding-bottom: 50px;
  background:
    radial-gradient(1100px 600px at 20% 0%, rgba(255,100,90,0.10), transparent 60%),
    radial-gradient(1000px 500px at 80% 30%, rgba(255,180,90,0.12), transparent 60%),
    linear-gradient(180deg, #fffdfb 0%, #fff 100%);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(13,13,13,0.5);
  margin-bottom: 28px;
}
.breadcrumb a { color: rgba(13,13,13,0.5); transition: color .2s; }
.breadcrumb a:hover { color: #ff6225; }
.breadcrumb .sep { color: rgba(13,13,13,0.3); }
.breadcrumb [aria-current="page"] { color: #0d0d0d; font-weight: 500; }

.dl-hero-title {
  font-size: 56px;
  font-weight: 700;
  line-height: 1.15;
  color: #0d0d0d;
  text-align: center;
  margin: 0 0 20px;
  letter-spacing: -1px;
}
.dl-hero-subtitle {
  font-size: 18px;
  line-height: 1.7;
  color: rgba(13,13,13,0.6);
  text-align: center;
  margin: 0 auto 36px;
  max-width: 720px;
}
.dl-hero-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 28px;
  font-size: 14px;
  color: rgba(13,13,13,0.7);
}
.dl-hero-meta .item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.dl-hero-meta .item::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: linear-gradient(135deg, #ff06a2, #ff6225);
}

.platforms-wrap {
  width: 100%;
  max-width: 1180px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.platform-card {
  background: #fff;
  border: 1px solid rgba(13,13,13,0.06);
  border-radius: 24px;
  padding: 36px 32px 32px;
  transition: all .3s ease;
  display: flex;
  flex-direction: column;
  position: relative;
}
.platform-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255,98,37,0.18);
  box-shadow: 0 24px 50px -18px rgba(13,13,13,0.16);
}
.platform-card.featured {
  background: linear-gradient(180deg, #fff 0%, #fff7f3 100%);
  border-color: rgba(255,98,37,0.2);
  box-shadow: 0 24px 50px -18px rgba(255,98,37,0.18);
}
.platform-card.featured .badge-recommend {
  position: absolute;
  top: 20px;
  right: 20px;
  padding: 4px 12px;
  border-radius: 999px;
  background: linear-gradient(135deg, #ff06a2, #ff6225);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.5px;
}
.platform-card .head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}
.platform-card .head img {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
}
.platform-card .head h3 {
  font-size: 22px;
  font-weight: 600;
  margin: 0 0 4px;
  color: #0d0d0d;
}
.platform-card .head .ver {
  font-size: 12px;
  color: rgba(13,13,13,0.5);
}
.platform-card .info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 20px;
  padding: 18px 0;
  border-top: 1px solid rgba(13,13,13,0.05);
  border-bottom: 1px solid rgba(13,13,13,0.05);
  margin-bottom: 22px;
}
.platform-card .info .item .label {
  display: block;
  font-size: 11px;
  color: rgba(13,13,13,0.45);
  margin-bottom: 4px;
}
.platform-card .info .item .val {
  font-size: 14px;
  color: #0d0d0d;
  font-weight: 500;
}
.platform-card .sys-req {
  font-size: 12px;
  line-height: 1.7;
  color: rgba(13,13,13,0.55);
  margin: 0 0 22px;
  flex: 1;
}
.platform-card .sys-req strong {
  color: #0d0d0d;
  font-weight: 600;
}
.platform-card .actions {
  display: flex;
  gap: 10px;
}
.platform-card .btn-primary {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 42px;
  border-radius: 999px;
  background: linear-gradient(135deg, #ff06a2 0%, #ff6225 100%);
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  box-shadow: 0 6px 14px rgba(255,60,80,0.24);
  transition: all .25s ease;
}
.platform-card .btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(255,60,80,0.36);
}
.platform-card .btn-secondary {
  flex: 0 0 42px;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(13,13,13,0.04);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #0d0d0d;
  transition: background .2s;
}
.platform-card .btn-secondary:hover { background: rgba(13,13,13,0.08); }
.platform-card .btn-secondary svg {
  width: 18px;
  height: 18px;
}

.platform-card.qr .qr-row {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 16px 0;
  border-top: 1px solid rgba(13,13,13,0.05);
  border-bottom: 1px solid rgba(13,13,13,0.05);
  margin-bottom: 22px;
}
.qr-code {
  width: 90px;
  height: 90px;
  flex-shrink: 0;
  border-radius: 8px;
  padding: 6px;
  background: #fff;
  border: 1px solid rgba(13,13,13,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
}
.qr-code .qr-grid {
  width: 100%;
  height: 100%;
  background-image:
    repeating-linear-gradient(0deg, #0d0d0d 0 3px, transparent 3px 6px),
    repeating-linear-gradient(90deg, #0d0d0d 0 3px, transparent 3px 6px);
  background-blend-mode: multiply;
  opacity: .82;
  position: relative;
}
.qr-code .qr-grid::before,
.qr-code .qr-grid::after,
.qr-code .qr-grid > i {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border: 4px solid #0d0d0d;
}
.qr-code .qr-grid::before { top: 0; left: 0; }
.qr-code .qr-grid::after { top: 0; right: 0; }
.qr-code .qr-grid > i { bottom: 0; left: 0; }
.qr-info { flex: 1; font-size: 13px; color: rgba(13,13,13,0.6); line-height: 1.7; }
.qr-info strong { color: #0d0d0d; }

.module.dl-steps {
  background: linear-gradient(180deg, #fff 0%, #f7f7fb 100%);
}
.steps-wrap {
  width: 100%;
  max-width: 1100px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
}
.step-card {
  background: #fff;
  border: 1px solid rgba(13,13,13,0.05);
  border-radius: 18px;
  padding: 32px 26px;
  position: relative;
  transition: all .3s ease;
}
.step-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 36px -14px rgba(13,13,13,0.12);
}
.step-num {
  position: absolute;
  top: -16px;
  left: 26px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, #ff06a2 0%, #ff6225 100%);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 18px rgba(255,60,80,0.3);
}
.step-card h3 {
  margin: 16px 0 10px;
  font-size: 17px;
  font-weight: 600;
  color: #0d0d0d;
}
.step-card p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(13,13,13,0.6);
}

.module.dl-compare {
  background: #fff;
}
.compare-table {
  width: 100%;
  max-width: 1000px;
  border-collapse: separate;
  border-spacing: 0;
  background: #fff;
  border: 1px solid rgba(13,13,13,0.06);
  border-radius: 20px;
  overflow: hidden;
}
.compare-table th,
.compare-table td {
  padding: 18px 22px;
  font-size: 14px;
  text-align: left;
  vertical-align: middle;
  border-bottom: 1px solid rgba(13,13,13,0.05);
}
.compare-table thead th {
  background: #fafafc;
  font-size: 15px;
  font-weight: 600;
  color: #0d0d0d;
}
.compare-table thead th.col-pro {
  background: linear-gradient(135deg, rgba(255,6,162,0.06), rgba(255,98,37,0.06));
  color: #ff6225;
}
.compare-table tbody td:first-child {
  color: rgba(13,13,13,0.7);
  font-weight: 500;
}
.compare-table tbody tr:last-child td { border-bottom: 0; }
.compare-table .yes {
  color: #1aa362;
  font-weight: 600;
}
.compare-table .no {
  color: rgba(13,13,13,0.3);
}
.compare-table .price {
  font-size: 18px;
  font-weight: 700;
}
.compare-table .price small {
  font-size: 12px;
  color: rgba(13,13,13,0.55);
  font-weight: 400;
}

.module.dl-security {
  background: linear-gradient(180deg, #f7f7fb 0%, #fff 100%);
}
.security-grid {
  width: 100%;
  max-width: 1100px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.sec-card {
  background: #fff;
  border-radius: 18px;
  padding: 30px 28px;
  border: 1px solid rgba(13,13,13,0.05);
}
.sec-card .icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(255,6,162,0.08), rgba(255,98,37,0.08));
  color: #ff6225;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 22px;
  font-weight: 700;
}
.sec-card h3 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 600;
  color: #0d0d0d;
}
.sec-card p {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: rgba(13,13,13,0.6);
}

.module.faq {
  background: linear-gradient(180deg, #fff 0%, #f5f5f7 100%);
}
.faq-list {
  width: 100%;
  max-width: 880px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: #fff;
  border: 1px solid rgba(13,13,13,0.06);
  border-radius: 16px;
  padding: 0 28px;
  transition: box-shadow .25s ease, border-color .25s ease;
}
.faq-item[open] {
  box-shadow: 0 18px 36px -16px rgba(13,13,13,0.12);
  border-color: rgba(255,98,37,0.18);
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 20px 0;
  font-size: 16px;
  font-weight: 600;
  color: #0d0d0d;
  position: relative;
  padding-right: 40px;
  user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(13,13,13,0.06);
  color: #0d0d0d;
  font-size: 18px;
  font-weight: 400;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .25s ease;
}
.faq-item[open] summary::after {
  content: "−";
  background: linear-gradient(135deg, #ff06a2, #ff6225);
  color: #fff;
}
.faq-item .faq-answer {
  padding: 0 0 22px;
  border-top: 1px solid rgba(13,13,13,0.05);
  padding-top: 18px;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(13,13,13,0.7);
}
.faq-item .faq-answer a {
  color: #ff6225;
  text-decoration: underline;
}

.module.dl-cta {
  background: linear-gradient(135deg, #0e0e1a 0%, #1c1733 50%, #2a1e3f 100%);
  color: #fff;
  padding: 80px 32px;
}
.module.dl-cta .module-header-title {
  color: #fff;
}
.module.dl-cta .module-header-subtitle {
  color: rgba(255,255,255,0.7);
}

footer {
  padding: 56px 24px 36px;
  background: #1c1c1f;
  color: rgba(255,255,255,0.7);
}
.footer-inner { max-width: 1200px; margin: 0 auto; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-grid h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin: 0 0 18px;
}
.footer-grid ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-grid ul a {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  transition: color .2s;
}
.footer-grid ul a:hover { color: #fff; }
.footer-brand p {
  font-size: 13px;
  line-height: 1.85;
  color: rgba(255,255,255,0.6);
  margin: 0 0 12px;
}
.footer-brand .footer-logo {
  height: 28px;
  margin-bottom: 16px;
  filter: brightness(0) invert(1);
}
.footer-brand .badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  font-size: 12px;
  color: rgba(255,255,255,0.75);
  margin-right: 6px;
  margin-bottom: 6px;
}
.footer-contact-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 14px;
}
.footer-contact-item .label {
  font-size: 12px;
  color: rgba(255,255,255,0.5);
}
.footer-contact-item .value {
  font-size: 14px;
  color: #fff;
  font-weight: 500;
}
.footer-bottom {
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 12px;
  color: rgba(255,255,255,0.45);
}
.footer-bottom a {
  color: rgba(255,255,255,0.55);
  transition: color .2s;
}
.footer-bottom a:hover { color: #fff; }
.footer-bottom .icp-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .8s ease, transform .8s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1024px) {
  .platforms-wrap { grid-template-columns: repeat(2, 1fr); }
  .steps-wrap { grid-template-columns: repeat(2, 1fr); }
  .security-grid { grid-template-columns: 1fr 1fr; }
  .dl-hero-title { font-size: 44px; }
}
@media (max-width: 768px) {
  .header-wrapper { height: 56px; padding: 0 16px; }
  .header-left .logo-title,
  .header-right .nav-link { display: none; }
  .module { padding: 70px 18px; }
  .module.dl-hero { padding-top: 100px; }
  .dl-hero-title { font-size: 32px; }
  .module-header-title { font-size: 30px; }
  .platforms-wrap { grid-template-columns: 1fr; }
  .steps-wrap { grid-template-columns: 1fr; gap: 28px; }
  .security-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .compare-table th,
  .compare-table td { padding: 12px 14px; font-size: 13px; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .dl-hero-title { font-size: 28px; }
}