/* ============ BAODA — Apple-style design system ============ */
:root{
  --ink:#1d1d1f;
  --ink-2:#515154;
  --muted:#86868b;
  --bg:#fff;
  --bg-soft:#f5f5f7;
  --bg-dark:#000;
  --red:#c8102e;
  --red-dark:#9e0b22;
  --radius:22px;
  --nav-h:52px;
  --maxw:1200px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--ink);background:var(--bg);
  -webkit-font-smoothing:antialiased;letter-spacing:-.01em;overflow-x:hidden;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
h1,h2,h3{letter-spacing:-.025em}
.m-only{display:none}

/* ---------- nav ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;transition:background .35s,box-shadow .35s}
.nav.scrolled{background:rgba(255,255,255,.78);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);box-shadow:0 1px 0 rgba(0,0,0,.06)}
.nav-inner{max-width:var(--maxw);margin:0 auto;height:var(--nav-h);padding:0 22px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:9px;font-weight:700}
.brand-mark{width:27px;height:28px;object-fit:contain}
.brand-text{font-size:15px;letter-spacing:.02em;display:flex;align-items:baseline;gap:7px}
.brand-text em{font-style:normal;font-size:11px;color:var(--muted);font-weight:500;letter-spacing:.08em}
.nav-links{display:flex;gap:26px;margin-left:auto}
.nav-links a{font-size:13px;color:var(--ink-2);font-weight:500;transition:color .2s}
.nav-links a:hover{color:var(--ink)}
.nav-right{display:flex;align-items:center;gap:16px}
.nav.on-dark:not(.scrolled) .nav-links a{color:rgba(255,255,255,.85)}
.nav.on-dark:not(.scrolled) .brand-text{color:#fff}
.nav.on-dark:not(.scrolled) .brand-text em{color:rgba(255,255,255,.55)}
.lang-switch{font-size:12px;font-weight:600;border:1px solid rgba(0,0,0,.18);border-radius:999px;padding:4px 11px;letter-spacing:.05em;transition:all .2s;color:var(--ink-2)}
.lang-switch:hover{border-color:var(--ink);color:var(--ink)}
.nav.on-dark:not(.scrolled) .lang-switch{border-color:rgba(255,255,255,.4);color:#fff}
.nav-cta{font-size:13px;font-weight:600;background:var(--red);color:#fff!important;padding:6px 15px;border-radius:999px;transition:background .2s}
.nav-cta:hover{background:var(--red-dark)}
.nav-menu{display:none;flex-direction:column;gap:4px;padding:6px}
.nav-menu span{width:17px;height:1.6px;background:var(--ink);border-radius:2px}
.nav.on-dark:not(.scrolled) .nav-menu span{background:#fff}

/* ---------- hero ---------- */
.hero{position:relative;height:100vh;min-height:600px;max-height:980px;display:flex;align-items:center;justify-content:center;text-align:center;color:#fff;overflow:hidden;background:#000}
.hero-video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.55}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.45) 0%,rgba(0,0,0,.15) 40%,rgba(0,0,0,.65) 100%)}
.hero-content{position:relative;z-index:2;padding:0 24px;max-width:980px}
.hero-eyebrow{font-size:14px;font-weight:600;letter-spacing:.22em;text-transform:uppercase;color:rgba(255,255,255,.75);margin-bottom:22px}
.hero-title{font-size:clamp(40px,7.5vw,84px);font-weight:700;line-height:1.06;letter-spacing:-.03em;text-shadow:0 4px 40px rgba(0,0,0,.3)}
.hero-sub{margin-top:20px;font-size:clamp(17px,2.2vw,23px);line-height:1.55;color:rgba(255,255,255,.88);font-weight:400}
.hero-actions{margin-top:38px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 30px;border-radius:999px;font-size:15px;font-weight:600;transition:transform .2s,background .2s,border-color .2s}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--red);color:#fff}
.btn-primary:hover{background:var(--red-dark)}
.btn-ghost{border:1.4px solid rgba(255,255,255,.75);color:#fff;backdrop-filter:blur(6px)}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.hero-scroll{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);z-index:2;width:24px;height:38px;border:1.8px solid rgba(255,255,255,.55);border-radius:14px;display:flex;justify-content:center;padding-top:7px}
.hero-scroll span{width:2.5px;height:7px;background:#fff;border-radius:2px;animation:scrollDot 1.8s infinite}
@keyframes scrollDot{0%{transform:translateY(0);opacity:1}70%{transform:translateY(11px);opacity:0}100%{opacity:0}}

/* ---------- stats ---------- */
.stats{background:var(--bg-soft)}
.stats-grid{max-width:var(--maxw);margin:0 auto;padding:52px 22px;display:grid;grid-template-columns:repeat(5,1fr);gap:20px;text-align:center}
.stat b{display:block;font-size:clamp(34px,4.4vw,54px);font-weight:700;letter-spacing:-.03em}
.stat i{font-style:normal;font-size:.55em;font-weight:600;margin-left:2px}
.stat span{display:block;margin-top:8px;font-size:12.5px;color:var(--muted);line-height:1.5}

/* ---------- sections ---------- */
.section{padding:110px 22px}
.section-head{max-width:820px;margin:0 auto 64px;text-align:center}
.kicker{font-size:13px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--red);margin-bottom:14px}
.kicker.light{color:#ff6b52}
.section-head h2{font-size:clamp(30px,4.6vw,52px);font-weight:700;line-height:1.12}
.section-sub{margin-top:16px;font-size:clamp(15px,1.8vw,19px);color:var(--muted);line-height:1.6}
.light{color:#fff}
.section-sub.light{color:rgba(255,255,255,.62)}

/* ---------- products ---------- */
.products{background:#fff}
.product-list{max-width:var(--maxw);margin:0 auto;display:flex;flex-direction:column;gap:22px}
.p-card{position:relative;border-radius:30px;overflow:hidden;display:grid;grid-template-columns:1.1fr 1fr;min-height:480px;cursor:pointer;isolation:isolate}
.p-card:nth-child(even){grid-template-columns:1fr 1.1fr}
.p-card:nth-child(even) .p-media{order:2}
.p-media{position:relative;display:flex;align-items:center;justify-content:center;padding:44px;background:linear-gradient(160deg,#f2f2f4,#e7e7eb)}
.p-media img{width:46%;max-width:300px;transition:transform .6s cubic-bezier(.2,.7,.2,1);filter:drop-shadow(0 24px 30px rgba(0,0,0,.18))}
.p-media img.p-out{position:absolute;opacity:0;transform:rotateY(-24deg) scale(.96)}
.p-card:hover .p-media img.p-in{opacity:0;transform:rotateY(24deg) scale(.96)}
.p-card:hover .p-media img.p-out{opacity:1;transform:rotateY(0)}
.p-media img{transition:opacity .5s,transform .6s cubic-bezier(.2,.7,.2,1)}
.p-view-hint{position:absolute;bottom:20px;left:50%;transform:translateX(-50%);font-size:12px;color:var(--muted);letter-spacing:.14em;text-transform:uppercase;opacity:.8}
.p-info{display:flex;flex-direction:column;justify-content:center;padding:56px clamp(28px,4vw,64px)}
.p-index{font-size:13px;font-weight:700;color:var(--red);letter-spacing:.14em;margin-bottom:14px}
.p-info h3{font-size:clamp(24px,2.8vw,34px);font-weight:700;line-height:1.2}
.p-en{font-size:13px;color:var(--muted);letter-spacing:.1em;text-transform:uppercase;margin-top:8px;font-weight:600}
.p-desc{margin-top:18px;font-size:15px;line-height:1.75;color:var(--ink-2)}
.p-tags{margin-top:22px;display:flex;flex-wrap:wrap;gap:8px}
.p-tags span{font-size:12px;font-weight:600;padding:6px 12px;border-radius:999px;background:var(--bg-soft);color:var(--ink-2);border:1px solid #e8e8ed}
.p-more{margin-top:26px;font-size:14px;font-weight:600;color:var(--red);display:inline-flex;align-items:center;gap:6px}
.p-card:active{transform:scale(.995)}

/* ---------- tech ---------- */
.tech{background:var(--bg-dark);color:#fff}
.tech-grid{max-width:var(--maxw);margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.tech-item{padding:34px 26px;border-radius:var(--radius);background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.08);transition:background .3s,transform .3s}
.tech-item:hover{background:rgba(255,255,255,.1);transform:translateY(-4px)}
.tech-ico{width:46px;height:46px;border-radius:13px;background:linear-gradient(135deg,#ff5a45,#c8102e);display:flex;align-items:center;justify-content:center;margin-bottom:20px}
.tech-ico svg{width:24px;height:24px;stroke:#fff;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.tech-item h3{font-size:17px;font-weight:700;margin-bottom:7px}
.tech-item p{font-size:13px;color:rgba(255,255,255,.58);line-height:1.6}

/* ---------- facilities ---------- */
.bases{max-width:var(--maxw);margin:0 auto 22px;display:grid;grid-template-columns:1fr 1fr;gap:22px}
.base-card{padding:38px 36px;border-radius:var(--radius);background:var(--bg-soft);border:1px solid #ececf0}
.base-card h3{font-size:23px;font-weight:700}
.base-meta{margin-top:10px;font-size:14px;color:var(--red);font-weight:600}
.base-addr{margin-top:14px;font-size:15px;color:var(--ink-2);line-height:1.6}
.base-link{display:inline-block;margin-top:16px;font-size:14px;font-weight:600;color:#06c}
.fac-aerials{max-width:var(--maxw);margin:0 auto 16px;display:grid;grid-template-columns:1fr 1fr;gap:16px}
.fac-aer-item{position:relative;border-radius:var(--radius);overflow:hidden;background:#000}
.fac-aer-item img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/9;transition:transform .7s cubic-bezier(.2,.7,.2,1)}
.fac-aer-item:hover img{transform:scale(1.05)}
.fac-aer-item figcaption{position:absolute;left:20px;bottom:18px;color:#fff;text-shadow:0 2px 12px rgba(0,0,0,.65);display:flex;flex-direction:column;gap:3px}
.fac-aer-item figcaption b{font-size:17px;font-weight:700}
.fac-aer-item figcaption span{font-size:12.5px;color:rgba(255,255,255,.82);font-weight:500}
.fac-grid{max-width:var(--maxw);margin:0 auto;display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.fac-item{position:relative;border-radius:var(--radius);overflow:hidden;background:#000;grid-column:span 2}
.fac-item img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;transition:transform .7s cubic-bezier(.2,.7,.2,1)}
.fac-wide{grid-column:span 6}
.fac-wide img{aspect-ratio:21/8}
.fac-half{grid-column:span 3}
.fac-item:hover img{transform:scale(1.05)}
.fac-item::after,.fac-aer-item::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,transparent 52%,rgba(0,0,0,.55) 100%);pointer-events:none}
.fac-item figcaption,.fac-aer-item figcaption{z-index:2}
.fac-item figcaption{position:absolute;left:18px;bottom:16px;color:#fff;font-size:13.5px;font-weight:600;text-shadow:0 2px 12px rgba(0,0,0,.6)}

/* ---------- brands ---------- */
.brands{background:var(--bg-dark)}
.brand-wall{max-width:1000px;margin:0 auto;display:flex;flex-wrap:wrap;border:1px solid rgba(255,255,255,.08);border-radius:var(--radius);overflow:hidden}
.brand-cell{flex:0 0 25%;background:#0a0a0c;display:flex;align-items:center;justify-content:center;padding:30px 22px;min-height:120px;box-shadow:inset 0 0 0 .5px rgba(255,255,255,.07)}
.brand-cell img{max-width:100%;max-height:56px;filter:grayscale(1) brightness(1.7) contrast(.55);opacity:.65;transition:all .35s}
.brand-cell:hover img{filter:none;opacity:1;transform:scale(1.06)}
.samples{max-width:var(--maxw);margin:70px auto 0;text-align:center}
.samples-title{font-size:14px;letter-spacing:.16em;text-transform:uppercase;color:rgba(255,255,255,.5);margin-bottom:34px;font-weight:600}
.samples-row{display:flex;justify-content:center;align-items:flex-end;gap:clamp(20px,5vw,70px);flex-wrap:wrap}
.samples-row img{height:170px;width:auto;object-fit:contain;transition:transform .4s}
.samples-row img:hover{transform:translateY(-8px)}

/* ---------- about ---------- */
.about{background:var(--bg-soft)}
.about-grid{max-width:var(--maxw);margin:0 auto;display:grid;grid-template-columns:1.05fr .95fr;gap:60px;align-items:center}
.about-copy h2{font-size:clamp(28px,3.8vw,44px);line-height:1.18;margin-bottom:24px}
.about-copy p{font-size:15.5px;line-height:1.85;color:var(--ink-2);margin-bottom:18px}
.about-tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:26px}
.about-tags span{font-size:13px;font-weight:600;padding:8px 18px;border-radius:999px;background:#fff;border:1px solid #dedee3;color:var(--ink)}
.about-visual{border-radius:28px;overflow:hidden;box-shadow:0 30px 70px rgba(0,0,0,.14)}
.about-visual img{width:100%;aspect-ratio:4/4.4;object-fit:cover}

/* ---------- contact ---------- */
.contact{background:linear-gradient(180deg,#000,#141416)}
.contact-grid{max-width:1000px;margin:0 auto;display:grid;grid-template-columns:minmax(0,480px);justify-content:center;gap:18px}
.contact-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.09);border-radius:var(--radius);padding:30px 26px;display:flex;gap:20px;align-items:center}
.contact-photo{width:84px;height:84px;border-radius:16px;object-fit:cover;flex:none;background:#fff}
.contact-logo{object-fit:contain;padding:12px}
.contact-card h3{color:#fff;font-size:18px;font-weight:700;margin-bottom:8px}
.contact-card h3 span{font-size:13px;color:rgba(255,255,255,.55);font-weight:500;margin-left:6px}
.contact-line{display:block;font-size:14px;color:#7ab7ff;line-height:1.6;word-break:break-all}
.contact-line.muted{color:rgba(255,255,255,.55);font-size:12.5px}
.qr-card{flex-direction:column;text-align:center;gap:14px}
.qr-frame{position:relative;display:block;width:130px;height:130px;border-radius:14px;overflow:hidden;background:#fff;flex:none;cursor:pointer;transition:transform .3s}
.qr-frame:hover{transform:scale(1.05)}
.qr-hint{margin-top:8px;font-size:12px;color:rgba(255,255,255,.75)}
.qr-frame img{width:100%;height:100%;object-fit:cover}
.qr-placeholder{position:absolute;inset:0;display:none;flex-direction:column;align-items:center;justify-content:center;gap:6px;background:repeating-linear-gradient(45deg,#f5f5f7,#f5f5f7 8px,#eeeef2 8px,#eeeef2 16px)}
.qr-frame.qr-missing .qr-placeholder{display:flex}
.qr-frame.qr-missing img{display:none}
.qr-placeholder b{font-size:13px;color:var(--ink-2)}
.qr-placeholder span{font-size:10px;letter-spacing:.2em;color:var(--muted)}

/* ---------- footer ---------- */
.footer{background:#0a0a0c;color:#999;padding:56px 22px 30px}
.footer-inner{max-width:var(--maxw);margin:0 auto;display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap;padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,.09)}
.footer-brand{display:flex;gap:16px;max-width:560px}
.footer-brand .brand-mark{filter:brightness(3)}
.footer-brand b{display:block;color:#ddd;font-size:14px;margin-bottom:6px}
.footer-brand span{display:block;font-size:11.5px;line-height:1.6;color:#777}
.footer-mute{margin-top:3px}
.footer-links{display:flex;gap:26px;align-items:center;flex-wrap:wrap}
.footer-links a{font-size:13px;color:#aaa;transition:color .2s}
.footer-links a:hover{color:#fff}
.footer-bottom{max-width:var(--maxw);margin:24px auto 0;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:12px;color:#666}

/* ---------- modal ---------- */
.modal{position:fixed;inset:0;z-index:200;display:none}
.modal.open{display:block}
.modal-backdrop{position:absolute;inset:0;background:rgba(0,0,0,.55);backdrop-filter:blur(6px);animation:fade .25s}
.modal-panel{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:min(940px,92vw);max-height:88vh;overflow:auto;background:#fff;border-radius:26px;animation:pop .3s cubic-bezier(.2,.8,.2,1)}
@keyframes fade{from{opacity:0}to{opacity:1}}
@keyframes pop{from{opacity:0;transform:translate(-50%,-46%) scale(.97)}to{opacity:1;transform:translate(-50%,-50%) scale(1)}}
.modal-close{position:absolute;top:16px;right:18px;z-index:3;width:34px;height:34px;border-radius:50%;background:rgba(0,0,0,.55);color:#fff;font-size:14px;display:flex;align-items:center;justify-content:center}
.m-gallery{display:grid;grid-template-columns:1fr 1fr;background:#f2f2f4}
.m-gallery img{width:100%;aspect-ratio:1/1.05;object-fit:contain;padding:36px}
.m-gallery .m-cap{text-align:center;font-size:12px;color:var(--muted);padding-bottom:18px;letter-spacing:.12em}
.m-gallery figure{display:flex;flex-direction:column}
.m-detail{padding:40px clamp(26px,4vw,52px) 48px}
.m-detail h3{font-size:clamp(24px,3vw,32px)}
.m-detail .m-en{font-size:12.5px;color:var(--muted);letter-spacing:.12em;text-transform:uppercase;margin:8px 0 20px;font-weight:600}
.m-detail p{font-size:15px;line-height:1.8;color:var(--ink-2)}
.m-specs{margin-top:26px;display:grid;grid-template-columns:1fr 1fr;gap:10px 26px}
.m-specs div{display:flex;justify-content:space-between;gap:14px;padding:11px 0;border-bottom:1px solid #eee;font-size:14px}
.m-specs b{font-weight:600;color:var(--ink)}
.m-specs span{color:var(--muted)}
.m-cta{margin-top:30px;display:inline-block;background:var(--red);color:#fff;padding:12px 28px;border-radius:999px;font-weight:600;font-size:14px}

/* ---------- reveal animation ---------- */
.reveal{opacity:0;transform:translateY(34px);transition:opacity .8s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media(max-width:900px){
  .nav-links{position:fixed;top:var(--nav-h);left:0;right:0;background:rgba(255,255,255,.96);backdrop-filter:blur(20px);flex-direction:column;gap:0;padding:8px 22px 20px;display:none;box-shadow:0 12px 30px rgba(0,0,0,.1)}
  .nav-links.open{display:flex}
  .nav-links a{padding:14px 4px;font-size:16px;border-bottom:1px solid #f0f0f2;color:var(--ink)!important}
  .nav-menu{display:flex}
  .nav-cta{display:none}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:30px 18px}
  .p-card,.p-card:nth-child(even){grid-template-columns:1fr;min-height:0}
  .p-card:nth-child(even) .p-media{order:0}
  .p-media{min-height:340px}
  .p-info{padding:36px 28px}
  .tech-grid{grid-template-columns:repeat(2,1fr)}
  .bases{grid-template-columns:1fr}
  .fac-aerials{grid-template-columns:1fr}
  .fac-grid{grid-template-columns:repeat(2,1fr)}
  .fac-item,.fac-half{grid-column:span 1}
  .fac-wide{grid-column:span 2}
  .fac-wide img{aspect-ratio:16/9}
  .brand-cell{flex-basis:33.3333%}
  .about-grid{grid-template-columns:1fr;gap:34px}
  .contact-grid{grid-template-columns:1fr}
  .contact-card{justify-content:flex-start}
  .m-gallery{grid-template-columns:1fr}
  .m-specs{grid-template-columns:1fr}
  .m-only{display:inline}
}
@media(max-width:520px){
  .section{padding:76px 18px}
  .fac-grid{grid-template-columns:1fr}
  .fac-item,.fac-half,.fac-wide{grid-column:span 1}
  .brand-cell{flex-basis:50%}
  .brand-text em{display:none}
  .hero-actions .btn{width:100%;text-align:center}
  .samples-row img{height:120px}
}