/* ============================================================
   BOROSA Acoustic Levitation — 中文官网共享样式
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&family=Montserrat:wght@300;400;500;600&display=swap');

:root{
  --ink:#26343b;        /* 主文字 炭墨 */
  --ink-2:#54646d;      /* 次级文字 */
  --ink-3:#8696a0;      /* 辅助/说明 */
  --navy:#1f2d35;       /* 深墨蓝 */
  --teal:#2f9fb2;       /* 品牌青蓝 (Logo 声波) */
  --teal-d:#247d8c;     /* 深青 */
  --line:#e3e8eb;       /* 分隔线 */
  --bg:#ffffff;
  --bg-soft:#f4f6f7;    /* 浅灰分区 */
  --bg-dark:#222e35;    /* 深色分区 */
  --maxw:1180px;
  --zh:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --lat:"Montserrat","Noto Sans SC",sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--zh);
  color:var(--ink);
  background:var(--bg);
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  font-size:16px;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 32px}

/* ---------- 顶部工具条 ---------- */
.topbar{
  background:var(--navy);
  color:#c7d2d8;
  font-size:13px;
  letter-spacing:.02em;
}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar a{color:#c7d2d8;transition:color .2s}
.topbar a:hover{color:#fff}
.topbar .tb-left{display:flex;gap:22px;align-items:center}
.topbar .tb-right{display:flex;gap:18px;align-items:center}
.lang-pill{border:1px solid rgba(255,255,255,.25);border-radius:2px;padding:2px 9px;font-size:12px}
.lang-pill.on{background:var(--teal);border-color:var(--teal);color:#fff}

/* ---------- 主导航 ---------- */
.nav{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.96);
  backdrop-filter:saturate(180%) blur(8px);
  border-bottom:1px solid var(--line);
}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:84px;gap:18px}
.brand{display:flex;align-items:center;gap:16px}
.brand a{display:flex;align-items:center;text-decoration:none;opacity:1;transition:opacity .18s}
.brand a:hover{opacity:.78}
.brand svg{height:46px;width:auto;display:block}
.brand-borosa{height:48px;width:auto;display:block}
.brand-eheng{height:50px;width:auto;display:block}
.brand-div{width:1px;height:38px;background:var(--line);display:block}
.brand-borosa.foot{height:50px;margin-bottom:20px;filter:brightness(0) invert(1);opacity:.92}
.menu{display:flex;align-items:stretch;height:84px;gap:2px}
.menu>li{position:relative;display:flex;align-items:center}
.menu>li>a{
  display:flex;align-items:center;height:100%;padding:0 13px;white-space:nowrap;
  font-size:14.5px;color:var(--ink);font-weight:500;letter-spacing:.01em;
  border-bottom:2px solid transparent;transition:color .2s,border-color .2s;
}
.menu>li>a:hover,.menu>li.active>a{color:var(--teal-d);border-bottom-color:var(--teal)}
.menu .caret{margin-left:6px;width:8px;height:8px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg) translateY(-2px);opacity:.6}

/* 下拉 */
.submenu{
  position:absolute;top:84px;left:0;min-width:248px;
  background:#fff;border:1px solid var(--line);border-top:2px solid var(--teal);
  box-shadow:0 18px 40px -18px rgba(31,45,53,.35);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .2s,transform .2s,visibility .2s;padding:8px 0;
}
.menu>li:hover .submenu{opacity:1;visibility:visible;transform:translateY(0)}
.submenu a{display:block;padding:11px 22px;font-size:14.5px;color:var(--ink-2);transition:background .15s,color .15s}
.submenu a:hover{background:var(--bg-soft);color:var(--teal-d)}
.submenu .sub-en{display:block;font-size:12px;color:var(--ink-3);margin-top:1px}

.nav-cta{
  display:inline-flex;align-items:center;gap:8px;white-space:nowrap;
  padding:11px 18px;background:var(--teal);color:#fff;
  border-radius:3px;font-size:14px;font-weight:500;transition:background .2s;
}
.nav-cta:hover{background:var(--teal-d)}

.nav-toggle{display:none;background:none;border:0;cursor:pointer;width:40px;height:40px}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--ink);margin:5px auto;transition:.25s}

/* ---------- 通用区块 ---------- */
section{position:relative}
.sec{padding:96px 0}
.sec-soft{background:var(--bg-soft)}
.sec-dark{background:var(--bg-dark);color:#e7edf0}
.eyebrow{
  font-family:var(--lat);font-size:13px;letter-spacing:.32em;text-transform:uppercase;
  color:var(--teal-d);font-weight:600;margin-bottom:20px;display:flex;align-items:center;gap:14px;
}
.eyebrow::before{content:"";width:34px;height:1.5px;background:var(--teal)}
.sec-dark .eyebrow{color:#5cc3d4}
h1,h2,h3{font-weight:300;line-height:1.25;color:var(--ink);letter-spacing:.005em}
.sec-dark h1,.sec-dark h2,.sec-dark h3{color:#fff}
h2.title{font-size:38px;margin-bottom:26px}
h2.title b{font-weight:300}
.lead{font-size:18px;color:var(--ink-2);line-height:2;font-weight:400;max-width:62ch}
.body-text{font-size:16.5px;color:var(--ink-2);line-height:2.05}
.body-text p+p{margin-top:20px}
.sec-dark .lead,.sec-dark .body-text{color:#c2cfd5}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 30px;border-radius:3px;font-size:15px;font-weight:500;
  transition:.2s;cursor:pointer;border:1.5px solid transparent;
}
.btn-primary{background:var(--teal);color:#fff}
.btn-primary:hover{background:var(--teal-d)}
.btn-ghost{border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--teal);color:var(--teal-d)}
.btn-light{border-color:rgba(255,255,255,.4);color:#fff}
.btn-light:hover{background:rgba(255,255,255,.1)}
.btn .arr{transition:transform .2s}
.btn:hover .arr{transform:translateX(4px)}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:640px;display:flex;align-items:center;overflow:hidden;background:var(--navy)}
.hero-bg{position:absolute;inset:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.42}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(20,30,36,.92) 0%,rgba(20,30,36,.66) 48%,rgba(20,30,36,.18) 100%)}
.hero .wrap{position:relative;z-index:2;padding-top:80px;padding-bottom:80px}
.hero h1{color:#fff;font-size:56px;line-height:1.15;font-weight:300;max-width:16ch}
.hero h1 b{font-weight:300}
.hero .sub{margin-top:26px;font-family:var(--lat);font-size:17px;letter-spacing:.12em;color:#8fd0db;font-weight:400}
.hero .sub span{color:#cfe1e6}
.hero .actions{margin-top:42px;display:flex;gap:16px;flex-wrap:wrap}

/* ---------- 两栏 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center}
.split.narrow{gap:56px}
.split .media img{width:100%;border-radius:4px;box-shadow:0 30px 60px -30px rgba(31,45,53,.4)}
.figure-cap{font-size:13px;color:var(--ink-3);margin-top:12px;letter-spacing:.01em}

/* ---------- 卡片 ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.card{background:#fff;border:1px solid var(--line);border-radius:5px;overflow:hidden;transition:transform .25s,box-shadow .25s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-5px);box-shadow:0 24px 48px -26px rgba(31,45,53,.4)}
.card .ph{aspect-ratio:4/3;overflow:hidden;background:var(--bg-soft)}
.card .ph img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.card:hover .ph img{transform:scale(1.05)}
.card .body{padding:26px 26px 30px;display:flex;flex-direction:column;flex:1}
.card .kicker{font-family:var(--lat);font-size:12px;letter-spacing:.2em;text-transform:uppercase;color:var(--teal-d);font-weight:600;margin-bottom:12px}
.card h3{font-size:22px;font-weight:500;margin-bottom:12px}
.card p{font-size:14.5px;color:var(--ink-2);line-height:1.85;flex:1}
.card .more{margin-top:18px;font-size:14px;color:var(--teal-d);font-weight:500;display:inline-flex;gap:7px;align-items:center}

/* ---------- 特性条 ---------- */
.features{display:grid;grid-template-columns:repeat(4,1fr);gap:34px}
.feature .fn{font-family:var(--lat);font-size:40px;font-weight:300;color:var(--teal);line-height:1}
.feature .ft{margin-top:14px;font-size:18px;font-weight:500;color:#ffffff}
.feature p{margin-top:8px;font-size:14px;color:var(--ink-2)}

/* ---------- 应用清单 ---------- */
.applist{display:grid;grid-template-columns:1fr 1fr;gap:14px 40px;margin-top:8px}
.applist li{list-style:none;padding:16px 0 16px 30px;position:relative;border-bottom:1px solid var(--line);font-size:15.5px;color:var(--ink-2)}
.applist li::before{content:"";position:absolute;left:0;top:24px;width:11px;height:11px;border:2px solid var(--teal);border-radius:50%}

/* ---------- 页内大图 ---------- */
.band{height:420px;overflow:hidden;position:relative;background:var(--navy)}
.band img{width:100%;height:100%;object-fit:cover}

/* ---------- 页面头 ---------- */
.pagehead{background:var(--bg-soft);border-bottom:1px solid var(--line);padding:54px 0 50px}
.breadcrumb{font-size:13px;color:var(--ink-3);margin-bottom:18px;display:flex;gap:9px;align-items:center;flex-wrap:wrap}
.breadcrumb a:hover{color:var(--teal-d)}
.breadcrumb .sep{opacity:.5}
.pagehead h1{font-size:42px;font-weight:300}
.pagehead h1 b{font-weight:300}
.pagehead .ph-sub{margin-top:14px;font-size:17px;color:var(--ink-2);max-width:64ch}

/* ---------- 占位 ---------- */
.tbd{
  background:repeating-linear-gradient(135deg,#f6f8f9,#f6f8f9 12px,#eef2f4 12px,#eef2f4 24px);
  border:1px dashed #c4d0d6;border-radius:5px;color:var(--ink-3);
  padding:40px;text-align:center;font-size:15px;
}
.tbd b{color:var(--teal-d);font-weight:600}

/* ---------- FAQ ---------- */
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{display:flex;justify-content:space-between;align-items:center;gap:20px;width:100%;background:none;border:0;cursor:pointer;padding:26px 4px;text-align:left;font-family:var(--zh);font-size:18px;font-weight:500;color:var(--ink)}
.faq-q .ic{flex:none;width:26px;height:26px;position:relative}
.faq-q .ic::before,.faq-q .ic::after{content:"";position:absolute;background:var(--teal);transition:.25s}
.faq-q .ic::before{top:12px;left:4px;width:18px;height:2px}
.faq-q .ic::after{top:4px;left:12px;width:2px;height:18px}
.faq-item.open .ic::after{transform:rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a .inner{padding:0 4px 28px;font-size:15.5px;color:var(--ink-2);line-height:2}

/* ---------- 联系 ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px}
.info-row{display:flex;gap:18px;padding:22px 0;border-bottom:1px solid var(--line)}
.info-row .ic{flex:none;width:42px;height:42px;border:1.5px solid var(--teal);border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--teal-d)}
.info-row .lbl{font-size:12.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-3);font-family:var(--lat);font-weight:600}
.info-row .val{font-size:16px;color:var(--ink);margin-top:4px;line-height:1.7}
.form label{display:block;font-size:13px;color:var(--ink-2);margin:18px 0 7px;font-weight:500}
.form input,.form textarea{width:100%;border:1px solid var(--line);border-radius:3px;padding:13px 15px;font-family:var(--zh);font-size:15px;color:var(--ink);background:#fff;transition:border-color .2s}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--teal)}
.form textarea{min-height:130px;resize:vertical}

/* ---------- 媒体网格 ---------- */
.media-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.media-tile{background:#fff;border:1px solid var(--line);border-radius:5px;overflow:hidden}
.media-tile .pic{aspect-ratio:1/1;background:var(--bg-soft);display:flex;align-items:center;justify-content:center;overflow:hidden}
.media-tile .pic img{width:100%;height:100%;object-fit:cover}
.media-tile .cap{padding:18px 20px}
.media-tile .cap .t{font-size:15px;font-weight:500;color:var(--ink)}
.media-tile .cap .d{font-size:13px;color:var(--ink-3);margin-top:5px}

/* ---------- 百度地图卡片 ---------- */
.map-link{display:inline-block;margin-top:9px;font-size:13.5px;color:var(--teal-d);font-weight:500}
.map-link:hover{color:var(--teal)}
.map-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.map-card{display:block;background:#fff;border:1px solid var(--line);border-radius:6px;overflow:hidden;transition:transform .25s,box-shadow .25s}
.map-card:hover{transform:translateY(-4px);box-shadow:0 24px 48px -26px rgba(31,45,53,.4)}
.map-canvas{position:relative;height:248px;overflow:hidden;background:#e7edef}
.map-frame{position:absolute;inset:0;width:100%;height:100%;border:0;display:block}
.map-badge{position:absolute;left:14px;top:14px;display:inline-flex;align-items:center;gap:8px;background:#fff;color:var(--ink);font-size:12.5px;font-weight:500;padding:7px 13px;border-radius:30px;box-shadow:0 6px 18px -6px rgba(31,45,53,.45);pointer-events:none;z-index:2}
.map-badge .dot{width:9px;height:9px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 3px rgba(47,159,178,.25)}
.map-deco{position:absolute;inset:0;width:100%;height:100%}
.map-pin{position:absolute;left:50%;top:50%;transform:translate(-50%,-100%);filter:drop-shadow(0 6px 8px rgba(31,45,53,.3));animation:pinbob 2.4s ease-in-out infinite}
@keyframes pinbob{0%,100%{transform:translate(-50%,-100%)}50%{transform:translate(-50%,-115%)}}
@media (prefers-reduced-motion:reduce){.map-pin{animation:none}}
.map-meta{padding:20px 22px 24px}
.map-meta .t{font-size:16px;font-weight:500;color:var(--ink)}
.loc-name{font-family:var(--zh);font-weight:600;font-size:16px;color:var(--ink);letter-spacing:.01em;display:flex;align-items:baseline;gap:9px;flex-wrap:wrap}
.loc-name .en{font-family:var(--lat);font-weight:500;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--teal-d)}
.map-meta .d{font-size:13.5px;color:var(--ink-2);margin-top:6px;line-height:1.6}
.map-meta .map-open{display:inline-block;margin-top:14px;font-size:14px;color:var(--teal-d);font-weight:500}
.map-card:hover .map-open{color:var(--teal)}
.map-detail{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.map-detail span{display:inline-flex;align-items:center;gap:7px;font-size:12px;color:var(--ink-2);background:var(--bg-soft);border:1px solid var(--line);border-radius:30px;padding:6px 12px;line-height:1}
.map-detail span svg{flex:none;color:var(--teal-d)}
@media(max-width:900px){.map-grid{grid-template-columns:1fr 1fr}}
@media(max-width:760px){.map-grid{grid-template-columns:1fr}}

/* ---------- 视频 ---------- */
.video-frame{position:relative;max-width:980px;margin:0 auto;border-radius:6px;overflow:hidden;box-shadow:0 40px 80px -36px rgba(31,45,53,.5);background:#000;border:1px solid var(--line)}
.video-frame video{display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;background:#000}

/* ---------- 规格条 / 清单 ---------- */
.spec-band{margin-top:30px;background:var(--bg-soft);border:1px solid var(--line);border-left:3px solid var(--teal);border-radius:4px;padding:24px 26px}
.spec-pair{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.spec-pair .sv{font-family:var(--lat);font-size:24px;font-weight:400;color:var(--ink);letter-spacing:.01em}
.spec-pair .sl{font-size:13px;color:var(--ink-3);margin-top:3px;letter-spacing:.04em}
.sec-dark .spec-band{background:rgba(255,255,255,.04);border-color:rgba(255,255,255,.14);border-left-color:var(--teal)}
.sec-dark .spec-pair .sv{color:#fff}

.speclist{list-style:none;display:flex;flex-direction:column}
.speclist.two{display:grid;grid-template-columns:1fr 1fr;gap:0 48px}
.speclist li{position:relative;padding:14px 0 14px 30px;border-bottom:1px solid var(--line);font-size:15.5px;color:var(--ink-2)}
.speclist li::before{content:"";position:absolute;left:2px;top:21px;width:9px;height:9px;background:var(--teal);transform:rotate(45deg)}
.sec-dark .speclist li{border-color:rgba(255,255,255,.1);color:#c2cfd5}
@media(max-width:760px){.speclist.two{grid-template-columns:1fr}.spec-pair{grid-template-columns:1fr}}

/* ---------- 产品实拍图廊 ---------- */
.photo-gallery{display:grid;grid-template-columns:2fr 1fr;grid-template-rows:auto auto;gap:22px}
.photo-gallery figure{margin:0;background:#fff;border:1px solid var(--line);border-radius:6px;overflow:hidden}
.photo-gallery img{display:block;width:100%;height:100%;object-fit:cover}
.photo-lg{grid-row:1 / span 2}
.photo-lg img{aspect-ratio:auto;max-height:640px}
.photo-sm img{aspect-ratio:16/11}
.photo-gallery figcaption{padding:14px 18px;font-size:13.5px;color:var(--ink-2);line-height:1.6;border-top:1px solid var(--line)}
@media(max-width:760px){.photo-gallery{grid-template-columns:1fr}.photo-lg{grid-row:auto}}

/* ---------- 媒体 / 新闻列表 ---------- */
.pr-layout{display:grid;grid-template-columns:1fr 300px;gap:56px;align-items:start}
.pr-list{display:flex;flex-direction:column}
.pr-item{display:grid;grid-template-columns:200px 1fr;gap:30px;padding:38px 0;border-bottom:1px solid var(--line)}
.pr-item:first-child{padding-top:0}
.pr-item.no-thumb{grid-template-columns:1fr}
.pr-item.no-thumb .pr-body{max-width:760px}
.pr-thumb{background:var(--bg-soft);border:1px solid var(--line);border-radius:4px;overflow:hidden;aspect-ratio:4/3;display:flex;align-items:center;justify-content:center}
.pr-thumb img{width:100%;height:100%;object-fit:cover}
.pr-thumb.contain{padding:18px;background:#fff}
.pr-thumb.contain img{object-fit:contain}
.pr-body h3{font-size:21px;font-weight:500;line-height:1.4;margin-bottom:10px}
.pr-body h3 a:hover{color:var(--teal-d)}
.pr-meta{font-size:12.5px;color:var(--ink-3);font-family:var(--lat);letter-spacing:.04em;margin-bottom:12px}
.pr-excerpt{font-size:15px;color:var(--ink-2);line-height:1.85}
.pr-link{display:inline-flex;align-items:center;gap:7px;margin-top:14px;font-size:14px;font-weight:500;color:var(--teal-d)}
.pr-link:hover{gap:11px}
.pr-side{position:sticky;top:104px}
.pr-side h4{font-size:13px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink);font-weight:600;font-family:var(--lat);padding-bottom:16px;border-bottom:2px solid var(--teal);margin-bottom:6px}
.pr-side ul{list-style:none}
.pr-side li{border-bottom:1px solid var(--line)}
.pr-side a{display:block;padding:14px 0;font-size:14.5px;color:var(--ink-2);line-height:1.5;transition:color .2s}
.pr-side a:hover{color:var(--teal-d)}
@media(max-width:980px){
  .pr-layout{grid-template-columns:1fr;gap:48px}
  .pr-side{position:static}
}
@media(max-width:560px){
  .pr-item{grid-template-columns:1fr;gap:16px}
}

/* ---------- 页脚 ---------- */
.footer{background:var(--bg-dark);color:#aebbc2;padding:70px 0 0;font-size:14.5px}
.footer .cols{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:44px;padding-bottom:54px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer h4{color:#fff;font-size:13px;letter-spacing:.16em;text-transform:uppercase;font-weight:600;margin-bottom:22px;font-family:var(--lat)}
.footer a{color:#aebbc2;transition:color .2s}
.footer a:hover{color:#fff}
.footer ul{list-style:none}
.footer li{margin-bottom:11px}
.footer .addr{line-height:1.95;color:#9aa8b0}
.footer .brand-foot svg{height:42px;margin-bottom:20px}
.footer .desc{color:#94a3ab;line-height:1.9;max-width:34ch}
.footer .social{display:flex;gap:12px;margin-top:22px}
.footer .social a{width:38px;height:38px;border:1px solid rgba(255,255,255,.18);border-radius:50%;display:flex;align-items:center;justify-content:center}
.footer .social a:hover{border-color:var(--teal);background:var(--teal)}
.footbar{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;padding:24px 0;font-size:13px;color:#8190984}
.footbar{color:#7d8d96}
.footbar a:hover{color:#fff}

/* ---------- 进入动画 ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.16,1,.3,1),transform .7s cubic-bezier(.16,1,.3,1)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* ---------- 响应式 ---------- */
@media(max-width:980px){
  .split,.contact-grid{grid-template-columns:1fr;gap:40px}
  .cards,.media-grid{grid-template-columns:repeat(2,1fr)}
  .features{grid-template-columns:repeat(2,1fr);gap:30px}
  .hero h1{font-size:42px}
  h2.title{font-size:30px}
}
@media(max-width:760px){
  .brand-eheng{height:42px}
  .brand svg{height:38px}
  .wrap{padding:0 22px}
  .sec{padding:62px 0}
  .topbar .tb-left .hide-sm{display:none}
  .menu,.nav-cta{display:none}
  .nav-toggle{display:block}
  .nav.open .menu{display:flex;position:absolute;top:84px;left:0;right:0;flex-direction:column;height:auto;background:#fff;border-bottom:1px solid var(--line);padding:8px 0}
  .nav.open .menu>li{height:auto;display:block}
  .nav.open .menu>li>a{height:auto;padding:14px 24px;border-bottom:1px solid var(--line)}
  .nav.open .submenu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;border-top:0;padding:0 0 8px}
  .nav.open .submenu a{padding-left:42px}
  .cards,.media-grid,.applist,.features{grid-template-columns:1fr}
  .hero h1{font-size:34px}
  .footer .cols{grid-template-columns:1fr 1fr;gap:32px}
}