:root {
  color-scheme: light;
  font-family: "Microsoft YaHei", "Segoe UI", sans-serif;
  color: #17202a;
  background: #f7f9fb;
  --blue: #1469c7;
  --green: #168a50;
  --coral: #c95648;
  --line: #d9e0e6;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: #f7f9fb; }
a { color: inherit; }
.hero { position: relative; display: flex; align-items: center; overflow: hidden; background: #162332; }
.hero-backdrop { position: absolute; top: 0; right: 5%; width: min(48vw, 560px); height: 100%; object-fit: contain; object-position: center; opacity: .58; filter: saturate(.8); }
.hero-overlay { position: absolute; inset: 0; background: rgba(16, 29, 43, .5); }
.hero-content { position: relative; z-index: 1; width: min(1160px, calc(100% - 48px)); margin: 0 auto; padding: 88px min(48vw, 560px) 88px 0; color: white; }
.eyebrow { margin: 0 0 12px; color: #3b91e7; font-size: 12px; font-weight: 700; text-transform: uppercase; }
.hero .eyebrow { color: #84c6ff; }
h1 { max-width: none; margin: 0; font-size: clamp(36px, 3.5vw, 52px); line-height: 1.08; letter-spacing: 0; white-space: nowrap; }
.hero-copy { max-width: 590px; margin: 24px 0 0; color: #d7e2ec; font-size: 17px; line-height: 1.8; }
.hero-actions { display: flex; align-items: center; gap: 20px; margin-top: 30px; }
.download-button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 0 22px; border-radius: 6px; color: white; background: var(--blue); font-size: 14px; font-weight: 700; text-decoration: none; }
.download-button:hover { background: #0f58aa; }
.text-link { color: white; font-size: 14px; text-underline-offset: 4px; }
.meta { margin: 17px 0 0; color: #aebdca; font-size: 12px; }
.showcase { width: min(1160px, calc(100% - 48px)); display: grid; grid-template-columns: minmax(260px, .8fr) minmax(390px, 1.2fr); gap: 70px; align-items: center; margin: 0 auto; padding: 92px 0; }
.section-heading h2 { margin: 0; font-size: 34px; line-height: 1.22; letter-spacing: 0; }
.section-heading > p:last-child { margin: 18px 0 0; color: #5f6c78; font-size: 15px; line-height: 1.8; }
.interface-preview { margin: 0; padding: 24px; border-left: 4px solid var(--green); background: white; box-shadow: 0 12px 32px rgba(29,45,59,.1); }
.interface-preview img { width: 100%; display: block; object-fit: contain; }
.interface-preview figcaption { margin-top: 12px; color: #6e7a85; font-size: 12px; text-align: center; }
.capabilities { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: white; }
.capabilities div { min-height: 150px; padding: 35px max(20px, 3vw); border-right: 1px solid var(--line); }
.capabilities div:last-child { border-right: 0; }
.capabilities strong { display: block; font-size: 17px; }
.capabilities div:nth-child(2) strong { color: var(--green); }
.capabilities div:nth-child(3) strong { color: var(--coral); }
.capabilities span { display: block; margin-top: 10px; color: #67737e; font-size: 13px; line-height: 1.7; }
.install { width: min(900px, calc(100% - 48px)); margin: 0 auto; padding: 92px 0 100px; }
.steps { margin: 42px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.steps li { display: grid; grid-template-columns: 52px 1fr; gap: 18px; align-items: start; padding: 24px 0; border-bottom: 1px solid var(--line); }
.steps li > span { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 50%; color: white; background: var(--blue); font-weight: 700; }
.steps strong { font-size: 16px; }
.steps p { margin: 7px 0 0; color: #66727d; font-size: 13px; line-height: 1.7; }
.final-download { margin-top: 30px; }
footer { display: flex; justify-content: center; padding: 28px 24px; border-top: 1px solid var(--line); color: #6d7882; background: white; font-size: 12px; }
footer a { color: var(--blue); }
@media (max-width: 760px) {
  .hero { align-items: flex-start; }
  .hero-backdrop { top: auto; right: 8%; bottom: -70px; width: 84vw; height: 62%; opacity: .48; }
  .hero-content { width: calc(100% - 36px); padding: 64px 0 280px; }
  h1 { font-size: 40px; white-space: normal; }
  .hero-copy { font-size: 15px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 14px; }
  .showcase { width: calc(100% - 36px); grid-template-columns: 1fr; gap: 36px; padding: 68px 0; }
  .interface-preview { padding: 14px; }
  .capabilities { grid-template-columns: 1fr 1fr; }
  .capabilities div:nth-child(2) { border-right: 0; }
  .capabilities div { min-height: 135px; }
  .install { width: calc(100% - 36px); padding: 68px 0 76px; }
}
@media (max-width: 430px) {
  .capabilities { grid-template-columns: 1fr; }
  .capabilities div { border-right: 0; }
}
.policy-page { color: #17202a; background: #f7f9fb; }
.policy-header { min-height: 64px; display: flex; align-items: center; justify-content: space-between; padding: 0 max(24px, calc((100vw - 900px) / 2)); border-bottom: 1px solid var(--line); background: white; }
.policy-header > a:first-child { font-size: 15px; font-weight: 700; text-decoration: none; }
.policy-back { color: var(--blue); font-size: 13px; text-underline-offset: 4px; }
.policy-content { width: min(900px, calc(100% - 48px)); margin: 0 auto; padding: 72px 0 96px; }
.policy-content > h1 { margin: 0; color: #17202a; font-size: 44px; white-space: normal; }
.policy-updated { margin: 14px 0 48px; color: #6c7781; font-size: 13px; }
.policy-content section { padding: 28px 0; border-top: 1px solid var(--line); }
.policy-content section:last-child { border-bottom: 1px solid var(--line); }
.policy-content h2 { margin: 0; font-size: 20px; letter-spacing: 0; }
.policy-content p, .policy-content li { color: #4f5c67; font-size: 14px; line-height: 1.9; }
.policy-content p { margin: 14px 0 0; }
.policy-content ul { margin: 14px 0 0; padding-left: 22px; }
.policy-content li + li { margin-top: 7px; }
.policy-content code { overflow-wrap: anywhere; padding: 2px 5px; border-radius: 4px; color: #25445f; background: #e9eef2; font-family: Consolas, monospace; }
.policy-content a { color: var(--blue); text-underline-offset: 3px; }
@media (max-width: 760px) {
  .policy-header { min-height: 58px; padding: 0 18px; gap: 18px; }
  .policy-header > a:first-child { font-size: 13px; }
  .policy-content { width: calc(100% - 36px); padding: 52px 0 68px; }
  .policy-content > h1 { font-size: 36px; }
  .policy-updated { margin-bottom: 36px; }
  .policy-content section { padding: 24px 0; }
}