* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --brand: #ffd100;
  --ink: #000;
  --text: #111;
  --muted: #333;
  --line: #1a1a1a;
  --soft: #f4f4f4;
  --paper: #fff;
}
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body {
  color: var(--text);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  line-height: 1.7;
  font-size: 20px;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%;  height: auto;}
.wrap { width: min(1200px, calc(100% - 32px)); margin: 0 auto; }
.nav {
  position: sticky; top: 0; z-index: 40;
  background: #000;
  border-bottom: 4px solid var(--brand);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; min-height: 84px; }
.brand { display: flex; align-items: center; gap: 12px; color: #fff; font-weight: 900; font-size: 22px; }
.brand-mark {
  width: 48px; height: 48px; display: grid; place-items: center;
  border-radius: 8px; color: #000; background: var(--brand); font-weight: 900; font-size: 26px;
}
.nav-links { display: flex; gap: 28px; font-weight: 800; font-size: 20px; color: #fff; }
.nav-links a:hover { color: var(--brand); }
.nav-cta, .btn {
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 12px; font-weight: 900; cursor: pointer; border: 0;
}
.nav-cta {
  padding: 14px 22px; color: #000; background: var(--brand); font-size: 18px;
}
.menu-btn { display: none; border: 0; background: none; color: var(--brand); font-size: 32px; cursor: pointer; }
.mobile-panel { display: none; flex-direction: column; gap: 16px; padding: 8px 0 20px; font-weight: 800; color: #fff; font-size: 20px; }
.mobile-panel.open { display: flex; }
.crumb { padding: 18px 0 0; color: var(--muted); font-size: 16px; font-weight: 700; }
.hero {
  position: relative; min-height: 80vh; padding: 48px 0 0; overflow: hidden;
  color: #fff; text-align: center;
  background: #000 url("3.webp") center/cover no-repeat;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,.88), rgba(0,0,0,.62) 48%, rgba(0,0,0,.92));
}
.hero-inner { position: relative; z-index: 1; display: flex; flex-direction: column; align-items: center; }
.hero h1 { max-width: 960px; font-size: clamp(30px, 5.2vw, 50px); line-height: 1.22; }
.hero-desc { max-width: 760px; margin-top: 18px; font-size: 22px; color: #f5f5f5; font-weight: 700; }
.hero-cta { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; margin-top: 24px; }
.btn { min-width: 180px; height: 64px; padding: 0 26px; font-size: 20px; }
.btn-primary { color: #000; background: var(--brand); }
.btn-ghost { color: #000; background: #fff; }
.btn-line { color: #fff; border: 3px solid #fff; background: transparent; }
.mega {
  margin-top: 28px; min-width: min(560px, 92%); height: 88px; padding: 0 28px;
  font-size: clamp(22px, 3.4vw, 32px); color: #000; background: var(--brand);
  border: 4px solid #fff; box-shadow: 0 8px 0 #fff;
}
.hero-shot { width: min(1100px, 100%); margin-top: 40px; }
.hero-shot img { width: 100%; height: min(42vw, 420px); object-fit: cover; border: 4px solid var(--brand); border-bottom: 0; }
section { padding: 72px 0; }
.head { max-width: 800px; margin: 0 auto 40px; text-align: center; }
h2 { color: var(--ink); font-size: clamp(30px, 4vw, 42px); }
.head p, .copy p { margin-top: 14px; color: var(--muted); font-size: 20px; font-weight: 600; }
h3 { color: var(--ink); font-size: 26px; }
.gallery { background: var(--soft); }
.cards-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.card { overflow: hidden; background: #fff; border: 3px solid #000; }
.card img { width: 100%; height: 220px; object-fit: cover; }
.card-body { padding: 20px 18px 24px; }
.card-body p { margin-top: 8px; color: var(--muted); font-size: 18px; font-weight: 700; }
.tag {
  display: inline-block; margin-top: 12px; padding: 6px 12px;
  color: #000; background: var(--brand); font-size: 15px; font-weight: 900;
}
.more { display: block; margin-top: 32px; text-align: center; color: #000; font-weight: 900; font-size: 22px; text-decoration: underline; }
.zigzag { display: grid; gap: 56px; }
.row { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 36px; }
.row.reverse .media { order: 2; }
.row img { width: 100%; height: 380px; object-fit: cover; border: 4px solid #000; }
.text-link { display: inline-block; margin-top: 20px; color: #000; font-weight: 900; font-size: 20px; background: var(--brand); padding: 12px 20px; }
.download { background: #000; color: #fff; text-align: center; }
.download h2 { color: #fff; }
.download .head p { color: #ddd; }
.cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 40px; text-align: left; }
.dl-card { padding: 28px 24px; background: #fff; color: #111; border: 4px solid var(--brand); }
.dl-card .kicker { color: #000; font-size: 16px; font-weight: 900; }
.dl-card h3 { font-size: 28px; }
.dl-card p { margin: 10px 0 20px; color: #333; font-size: 18px; font-weight: 700; }
.dl-card .btn { width: 100%; height: 72px; color: #000; background: var(--brand); font-size: 22px; }
.quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 48px; }
.quote { padding: 28px; background: var(--soft); border: 3px solid #000; font-size: 20px; font-weight: 700; }
.quote strong { display: block; margin-top: 16px; color: #000; }
.users { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; margin-bottom: 48px; }
.user { padding: 22px 12px; border: 3px solid #000; text-align: center; }
.avatar {
  width: 64px; height: 64px; margin: 0 auto; display: grid; place-items: center;
  border-radius: 50%; background: var(--brand); color: #000; font-weight: 900; font-size: 26px;
}
.user b { display: block; margin: 12px 0 6px; color: var(--ink); font-size: 18px; }
.user p { color: var(--muted); font-size: 16px; font-weight: 700; }
.stars { margin-top: 8px; color: #000; font-size: 16px; font-weight: 900; }
.about {
  display: flex; align-items: center; justify-content: space-between; gap: 32px;
  padding: 36px; background: #000; color: #fff;
}
.about h3 { color: #fff; font-size: 28px; }
.about p { color: #ddd; }
.pills { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.pills span { padding: 8px 14px; background: var(--brand); font-size: 16px; font-weight: 900; color: #000; }
.trust-nums { display: flex; gap: 28px; text-align: center; }
.trust-nums strong { display: block; color: var(--brand); font-size: 36px; }
.trust-nums span { color: #ddd; font-size: 16px; font-weight: 700; }
footer { padding: 48px 0; background: #000; color: #ccc; text-align: center; border-top: 4px solid var(--brand); }
footer .name { color: var(--brand); font-weight: 900; margin-bottom: 14px; font-size: 24px; }
footer nav { display: flex; justify-content: center; gap: 24px; margin-bottom: 12px; font-size: 18px; font-weight: 800; }
footer a:hover { color: var(--brand); }
@media (max-width: 960px) {
  .nav-links { display: none; }
  .menu-btn { display: block; }
  .cards-4, .cards-3, .quotes { grid-template-columns: 1fr; }
  .users { grid-template-columns: 1fr 1fr; }
  .row, .row.reverse .media, .about { display: block; }
  .row.reverse .media { order: 0; }
  .row img { height: 240px; margin-bottom: 16px; }
  .about { text-align: center; }
  .trust-nums { justify-content: center; margin-top: 16px; flex-wrap: wrap; }
  .hero-shot img { height: 220px; }
}
@media (max-width: 640px) {
  .wrap { width: calc(100% - 20px); }
  .hero { padding-top: 36px; min-height: 0; }
  .users { grid-template-columns: 1fr; }
  .mega { height: 76px; }
}

/* 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); }