:root {
  --ppvi-bg: #f6f5f2;
  --ppvi-paper: rgba(255,255,255,.9);
  --ppvi-ink: #181817;
  --ppvi-muted: #6f6c66;
  --ppvi-line: rgba(24,24,23,.1);
  --ppvi-red: #b61f2b;
  --ppvi-radius: 8px;
  --ppvi-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --ppvi-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
}
* { box-sizing: border-box; }
html { min-width: 0; text-size-adjust: 100%; }
body.ppvi-body,
body {
  margin: 0;
  background: var(--ppvi-bg);
  color: var(--ppvi-ink);
  font-family: var(--ppvi-sans);
}
img { max-width: 100%; height: auto; }
button, input, textarea { font: inherit; }
.container,
.ppvi-site-inner {
  width: min(100% - 2rem, 1296px);
  margin-inline: auto;
}
.d-none { display: none !important; }
.img-fluid { max-width: 100%; height: auto; }
.ratio { position: relative; display: block; width: 100%; }
.ratio::before { display: block; content: ""; }
.ratio-16x9::before { padding-top: 56.25%; }
.ratio > * { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.bi { display: none; }
.ppvi-site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid rgba(24,24,23,.08);
  background: rgba(250,249,246,.92);
  backdrop-filter: blur(14px);
}
.ppvi-site-header .ppvi-site-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 72px;
}
.ppvi-brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  text-decoration: none;
}
.ppvi-brand img {
  width: 178px;
  height: auto;
  filter: drop-shadow(0 8px 18px rgba(24,24,23,.1));
}
.ppvi-nav-panel {
  display: flex;
  flex: 1 1 auto;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.ppvi-primary-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .2rem;
}
.ppvi-primary-nav a {
  padding: .45rem .62rem;
  border-radius: 999px;
  color: #302e2a;
  font: 600 .92rem/1 var(--ppvi-sans);
  text-decoration: none;
}
.ppvi-primary-nav a:hover {
  background: rgba(182,31,43,.08);
  color: var(--ppvi-red);
}
.ppvi-search {
  display: flex;
  align-items: center;
  gap: .35rem;
  min-width: min(28vw, 260px);
  padding: .25rem;
  border: 1px solid rgba(24,24,23,.1);
  border-radius: 999px;
  background: rgba(255,255,255,.82);
}
.ppvi-search input {
  min-width: 0;
  width: 100%;
  border: 0;
  outline: 0;
  background: transparent;
  padding: .48rem .6rem;
  color: var(--ppvi-ink);
}
.ppvi-search button {
  flex: 0 0 auto;
  border: 0;
  border-radius: 999px;
  background: #242321;
  color: #fff;
  padding: .52rem .82rem;
  cursor: pointer;
}
.ppvi-nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  margin-left: auto;
  border: 1px solid rgba(24,24,23,.12);
  border-radius: var(--ppvi-radius);
  background: rgba(255,255,255,.75);
  padding: .55rem;
}
.ppvi-nav-toggle span {
  display: block;
  height: 2px;
  margin: 5px 0;
  border-radius: 999px;
  background: #242321;
}
.ppvi-site-footer {
  border-top: 1px solid rgba(24,24,23,.08);
  background: #242321;
  color: rgba(255,255,255,.72);
}
.ppvi-site-footer .ppvi-site-inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.2rem;
  font-size: .9rem;
}
.ppvi-site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
}
.ppvi-site-footer a {
  color: rgba(255,255,255,.78);
  text-decoration: none;
}
.ppvi-qr-popover {
  position: fixed;
  z-index: 80;
  width: 176px;
  padding: .75rem;
  border: 1px solid rgba(24,24,23,.1);
  border-radius: var(--ppvi-radius);
  background: #fff;
  box-shadow: 0 18px 42px rgba(24,24,23,.16);
}
.ppvi-qr-popover img { display: block; width: 150px; margin: 0 auto; }
@media (min-width: 992px) {
  .d-lg-flex { display: flex !important; }
  .d-lg-none { display: none !important; }
}
@media (min-width: 768px) {
  .d-md-block { display: block !important; }
}
@media (max-width: 980px) {
  .ppvi-site-header .ppvi-site-inner {
    flex-wrap: wrap;
    min-height: 64px;
    padding-block: .55rem;
  }
  .ppvi-brand img { width: 158px; }
  .ppvi-nav-toggle { display: block; }
  .ppvi-nav-panel {
    display: none;
    width: 100%;
    flex-basis: 100%;
    flex-direction: column;
    align-items: stretch;
    padding: .4rem 0 .6rem;
  }
  .ppvi-site-header.is-open .ppvi-nav-panel { display: flex; }
  .ppvi-primary-nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: .35rem;
  }
  .ppvi-primary-nav a {
    background: rgba(24,24,23,.045);
    padding: .7rem .8rem;
  }
  .ppvi-search { width: 100%; min-width: 0; }
  .ppvi-site-footer .ppvi-site-inner { flex-direction: column; }
}
@media (max-width: 575.98px) {
  .container,
  .ppvi-site-inner { width: min(100% - 1.5rem, 1296px); }
}