* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --brand: #e11d2e;
  --ink: #111;
  --text: #333;
  --muted: #666;
  --line: #e5e5e5;
  --soft: #f6f6f6;
}
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body {
  color: var(--text);
  background: #fff;
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%;  height: auto;}
.wrap { width: min(1200px, calc(100% - 40px)); margin: 0 auto; }
.nav {
  position: sticky; top: 0; z-index: 40;
  background: #fff;
  border-bottom: 2px solid var(--ink);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; min-height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 800; }
.brand-mark {
  width: 36px; height: 36px; display: grid; place-items: center;
  color: #fff; background: var(--brand); font-weight: 900;
}
.nav-links { display: flex; gap: 24px; font-weight: 700; font-size: 15px; }
.nav-links a:hover { color: var(--brand); }
.nav-cta, .btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 900; cursor: pointer; border: 0; color: #fff; background: var(--brand);
}
.nav-cta { padding: 10px 18px; font-size: 14px; }
.menu-btn { display: none; border: 0; background: none; font-size: 22px; cursor: pointer; }
.mobile-panel { display: none; flex-direction: column; gap: 12px; padding: 8px 0 16px; font-weight: 700; }
.mobile-panel.open { display: flex; }
.crumb { padding: 14px 0 0; color: var(--muted); font-size: 13px; }
.hero { padding: 56px 0 0; text-align: center; background: #fff; }
.hero-inner { display: flex; flex-direction: column; align-items: center; }
.hero h1 { max-width: 920px; font-size: clamp(26px, 4.6vw, 42px); line-height: 1.25; color: var(--ink); }
.hero-desc { max-width: 640px; margin-top: 14px; font-size: 16px; color: var(--muted); }
.hero-cta { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 24px; }
.btn { min-width: 140px; height: 48px; padding: 0 20px; font-size: 16px; }
.btn-ghost, .btn-line { color: var(--ink); background: #fff; border: 2px solid var(--ink); }
.mega {
  display: flex; align-items: center; justify-content: center;
  width: min(920px, 100%); min-height: 92px; margin-top: 28px; padding: 18px 24px;
  font-size: clamp(22px, 4vw, 36px); font-weight: 900; color: #fff; background: var(--brand);
  box-shadow: 0 8px 0 #8b101b;
}
.mega:hover { transform: translateY(2px); box-shadow: 0 6px 0 #8b101b; }
.hero-shot { width: min(1100px, 100%); margin-top: 40px; }
.hero-shot img { width: 100%; }
section { padding: 72px 0; }
.head { max-width: 720px; margin: 0 auto 36px; text-align: center; }
h2 { color: var(--ink); font-size: clamp(24px, 3.2vw, 34px); }
.head p, .copy p { margin-top: 12px; color: var(--muted); }
h3 { color: var(--ink); font-size: 20px; }
.gallery { background: var(--soft); }
.cards-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.card { overflow: hidden; background: #fff; border: 1px solid var(--line); }
.card img { width: 100%; height: 160px; object-fit: cover; }
.card-body { padding: 16px 18px 20px; }
.card-body p { margin-top: 6px; color: var(--muted); font-size: 13px; }
.tag { display: inline-block; margin-top: 10px; color: var(--brand); font-size: 12px; font-weight: 800; }
.more { display: block; margin-top: 24px; text-align: center; color: var(--brand); font-weight: 800; }
.zigzag { display: grid; gap: 56px; }
.row { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 40px; }
.row.reverse .media { order: 2; }
.row img { width: 100%; height: 300px; object-fit: cover; border: 1px solid var(--line); }
.text-link { display: inline-block; margin-top: 16px; color: var(--brand); font-weight: 800; border-bottom: 2px solid var(--brand); }
.download { background: #fff; text-align: center; }
.cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 36px; text-align: left; }
.dl-card { padding: 24px; background: var(--soft); border: 1px solid var(--line); }
.dl-card .kicker { color: var(--brand); font-size: 13px; font-weight: 800; }
.dl-card p { margin: 8px 0 16px; color: var(--muted); font-size: 14px; }
.dl-card .btn { width: 100%; height: 48px; }
.quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 48px; }
.quote { padding: 20px; background: var(--soft); }
.quote strong { display: block; margin-top: 12px; color: var(--brand); }
.users { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; margin-bottom: 40px; }
.user { padding: 16px 12px; border: 1px solid var(--line); text-align: center; }
.avatar {
  width: 40px; height: 40px; margin: 0 auto; display: grid; place-items: center;
  border-radius: 50%; background: #ffe8ea; color: var(--brand); font-weight: 900;
}
.user b { display: block; margin: 8px 0 4px; color: var(--ink); font-size: 14px; }
.user p { color: var(--muted); font-size: 13px; }
.stars { margin-top: 6px; color: #c9a227; font-size: 12px; }
.about {
  display: flex; align-items: center; justify-content: space-between; gap: 28px;
  padding: 28px; background: var(--soft);
}
.pills { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.pills span { padding: 6px 12px; background: #fff; font-size: 13px; font-weight: 700; color: var(--ink); border: 1px solid var(--line); }
.trust-nums { display: flex; gap: 24px; text-align: center; }
.trust-nums strong { display: block; color: var(--ink); font-size: 26px; }
.trust-nums span { color: var(--muted); font-size: 13px; }
footer { padding: 40px 0; background: #111; color: rgba(255,255,255,.7); text-align: center; }
footer .name { color: #fff; font-weight: 800; margin-bottom: 12px; }
footer nav { display: flex; justify-content: center; gap: 20px; margin-bottom: 10px; }
footer a:hover { color: #fff; }
@media (max-width: 960px) {
  .nav-links { display: none; }
  .menu-btn { display: block; }
  .cards-4, .cards-3, .quotes { grid-template-columns: 1fr 1fr; }
  .users { grid-template-columns: 1fr 1fr; }
  .row, .row.reverse .media, .about { display: block; }
  .row.reverse .media { order: 0; }
  .row img { height: 200px; margin-bottom: 14px; }
  .about { text-align: center; }
  .trust-nums { justify-content: center; margin-top: 14px; }
}
@media (max-width: 640px) {
  .wrap { width: calc(100% - 28px); }
  .hero { padding-top: 36px; }
  .cards-4, .cards-3, .quotes, .users { grid-template-columns: 1fr; }
  .mega { min-height: 72px; font-size: 20px; }
}

/* site-perf */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}
.nav { transform: translateZ(0); }