/* VERBATIM copy of the inline <style> block in AirCheck-Website/zh/about.html (lines 34-64):
   nav dropdown, burger, mobile menu and the .ahero peri band. Do not edit here; re-copy from the site. */
.nav-dd { position: relative; }
.nav-dd .dd-panel { position: absolute; top: 100%; left: -14px; padding-top: 12px; opacity: 0; visibility: hidden; transition: opacity .18s ease, visibility .18s ease; }
.nav-dd:hover .dd-panel { opacity: 1; visibility: visible; }
.nav-dd .dd-card { display: block; background: #fff; border: 1px solid var(--line); border-radius: 16px; min-width: 190px; padding: 8px; box-shadow: 0 22px 46px -26px rgba(24,33,37,.45); }
header.nav .nav-dd .dd-card a { display: block; padding: 10px 14px; border-radius: 10px; color: var(--ink-2) !important; font-size: 14px; font-weight: 500; transition: background .14s ease, color .14s ease; }
.nav-dd .dd-card a:hover { background: var(--page); color: var(--ink); }
.burger { display: none; background: none; border: 0; color: #fff; cursor: pointer; padding: 8px; }
#mobile-menu { background: rgba(255,255,255,.97); border-top: 1px solid var(--line); }
#mobile-menu a { display: block; padding: 12px 0; color: var(--ink-2); font-size: 15px; }
#mobile-menu .grp { font-family: var(--display); font-size: 12px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--peri-lo); padding-top: 8px; }

.ahero { background: var(--peri); text-align: center; padding: clamp(64px,10vw,130px) 0 clamp(56px,8vw,96px); position: relative; overflow: hidden; isolation: isolate; }
.ahero::before { content:""; position:absolute; z-index:-1; inset:0; background: radial-gradient(60% 50% at 50% 0%, rgba(255,255,255,.16), transparent 70%); }
.ahero img.dog { width: clamp(96px, 12vw, 130px); height: auto; margin: 0 auto 22px; display: block; }
.ahero h1 { font-family: var(--display); font-weight: 800; color: #fff; font-size: clamp(38px,6vw,68px); letter-spacing: -0.02em; }
.ahero p { color: rgba(255,255,255,.9); margin: 16px auto 0; font-size: clamp(15px,1.8vw,18px); }

.story { max-width: 720px; margin: 0 auto; padding: clamp(56px,8vw,100px) 24px; }
.story .back { display: inline-flex; align-items: center; gap: 8px; font-family: var(--display); font-weight: 600; font-size: 14px; color: var(--peri-lo); margin-bottom: 30px; }
.story .back:hover { color: var(--ink); }
.story p { font-family: var(--body-read); color: #38414d; font-size: 17px; line-height: 1.85; margin-top: 24px; }
.story p:first-child { margin-top: 0; font-family: var(--display); font-weight: 500; font-size: clamp(20px,2.4vw,26px); color: var(--ink); line-height: 1.5; }

.brandmark { }
.brandmark .wrap { padding: clamp(56px,8vw,96px) 24px; text-align: center; }
.brandmark img { max-width: min(420px, 80%); height: auto; margin: 0 auto; display: block; }
.brandmark .back { display: inline-flex; align-items: center; gap: 8px; font-family: var(--display); font-weight: 600; font-size: 14px; color: var(--peri-lo); margin-top: 40px; }
.brandmark .back:hover { color: var(--ink); }

@media (max-width: 900px) { .nav-links-home { display: none; } .burger { display: block; } }
@media (min-width: 901px) { #mobile-menu { display: none !important; } }