:root {
  --blue: #2b5f8a;
  --green: #3d7a62;
  --red: #a84a3f;
  --ink: #1e2428;
  --paper: #ece8e1;
  --muted: #5d666c;
  --white: #f7f4ef;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
img { max-width:100%;height:auto; display: block; }
.wrap { width: min(1100px, calc(100% - 32px)); margin: 0 auto; }
nav {
  position: sticky; top: 0; z-index: 20;
  background: rgba(236, 232, 225, .94);
  border-bottom: 3px solid var(--ink);
}
.nav { display: flex; align-items: center; gap: 18px; min-height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: .06em; }
.brand i { width: 42px; height: 16px; background: var(--blue); box-shadow: 16px 0 0 var(--green), 32px 0 0 var(--red); margin-right: 32px; }
.links { display: flex; gap: 16px; margin-left: auto; font-size: 14px; }
.button {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 18px; background: var(--blue); color: #fff; font-weight: 800; border: 0;
}
.ghost { display: inline-flex; align-items: center; border-bottom: 2px solid var(--ink); padding-bottom: 2px; font-weight: 700; }
.hero { padding: 44px 0 16px; }
.hero-row { display: grid; grid-template-columns: 1.05fr .95fr; gap: 28px; align-items: center; }
.kicker { font-size: 13px; letter-spacing: .14em; color: var(--blue); margin-bottom: 10px; }
h1 { font-size: clamp(30px, 4.3vw, 46px); line-height: 1.15; margin-bottom: 12px; }
.lead { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.stack { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.box {
  height: 88px; display: grid; place-items: center;
  color: #fff; font-weight: 800; letter-spacing: .2em;
  box-shadow: inset 0 -8px 0 rgba(0,0,0,.12);
}
.box.blue { background: var(--blue); }
.box.green { background: var(--green); }
.box.red { background: var(--red); }
.box.dim { opacity: .72; height: 64px; }
.hero-shot { margin-top: 28px; }
.hero-shot img { width: 100%; height: 250px; object-fit: cover; }
.hero-shot figcaption { padding: 8px 0; font-size: 13px; color: var(--muted); }
.section { padding: 64px 0; }
.head { max-width: 620px; margin-bottom: 24px; }
h2 { font-size: 26px; margin-bottom: 8px; }
.grid6 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.card { background: var(--white); padding: 16px 16px 16px 18px; border-left: 8px solid var(--blue); }
.card.c-green { border-left-color: var(--green); }
.card.c-red { border-left-color: var(--red); }
.icon { font-size: 12px; letter-spacing: .12em; color: var(--muted); margin-bottom: 6px; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: center; }
.split img, .shot img { width: 100%; height: 300px; object-fit: cover; }
.scene-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 14px 0 20px; }
.scene { display: flex; gap: 8px; padding: 10px; background: var(--white); }
.review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.review { background: var(--white); padding: 18px; }
.person { margin-top: 12px; display: flex; flex-direction: column; }
.person small { color: var(--muted); }
.visual { padding: 0 0 64px; }
.metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 16px 0 20px; }
.metrics div { background: var(--white); padding: 12px; border-top: 8px solid var(--blue); }
.metrics div:nth-child(2) { border-top-color: var(--green); }
.metrics div:nth-child(3) { border-top-color: var(--red); }
.metrics b { display: block; font-size: 22px; }
.faq-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 28px; }
details { background: var(--white); padding: 12px 14px; margin-bottom: 8px; }
summary { cursor: pointer; font-weight: 700; }
details p { margin-top: 8px; color: var(--muted); }
.cta { background: var(--blue); color: #fff; padding: 44px 0; }
.cta-in { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.cta .button { background: var(--white); color: var(--ink); }
footer { padding: 36px 0 18px; }
.footer { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 16px; }
.footer h4 { margin-bottom: 8px; }
.footer a, .footer p { display: block; color: var(--muted); font-size: 14px; margin-top: 6px; }
.copy { margin-top: 16px; color: var(--muted); font-size: 13px; }
.page-head { padding: 48px 0 8px; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.download-card { background: var(--white); padding: 20px; border-top: 10px solid var(--green); }
.help-layout { display: grid; grid-template-columns: 210px 1fr; gap: 24px; }
.side { position: sticky; top: 80px; align-self: start; }
.side a { display: block; padding: 8px 0; border-bottom: 1px solid rgba(30,36,40,.12); }
.article { background: var(--white); padding: 22px; margin-bottom: 14px; }
.policy { margin-top: 16px; padding-top: 12px; color: var(--muted); }
@media (max-width: 900px) {
  .links { display: none; }
  .hero-row, .split, .faq-layout, .help-layout, .cta-in, .cards, .footer { grid-template-columns: 1fr; }
  .grid6, .review-grid { grid-template-columns: 1fr 1fr; }
  .hero-shot img, .split img, .shot img { height: 210px; }
}
@media (max-width: 560px) {
  .grid6, .review-grid, .metrics, .stack { grid-template-columns: 1fr 1fr; }
}

@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}