*{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#0a0a0c; --bg2:#101013; --card:#15151a; --card2:#1c1c22;
  --line:rgba(255,255,255,.09); --line2:rgba(255,255,255,.16);
  --txt:#f2f2f4; --txt2:#a8a8b3; --txt3:#6f6f7b;
  /* 强调色：纯黑白灰体系（原金色全部撤掉） */
  --acc:#ffffff;            /* 主强调：纯白 */
  --acc2:rgba(255,255,255,.74); /* 次强调：浅灰白 */
  --cyan:#3fb8c8;
  /* 白色导航专用：白底上的文字、分隔线与强调色 */
  --nav-txt:#17171b; --nav-txt2:#5b5b66;
  --nav-line:rgba(0,0,0,.10);
  --nav-ink:#111114; --nav-ink2:#4a4a55;
}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue",Arial,sans-serif;
  background:var(--bg); color:var(--txt); line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.wrap{max-width:1240px;margin:0 auto;padding:0 28px}

/* nav —— 默认深色；鼠标移到 Products / Accessories（或手机端展开菜单）时整条转白 */
nav{
  position:sticky;top:0;z-index:100;
  /* 当前态的导航配色，nav.nav-light 下整体切到白底 */
  --nk:#f4f4f6;            /* 菜单文字 */
  --nk2:#b6b6c2;           /* 次要文字 */
  --nk-line:rgba(255,255,255,.11);
  --nk-logo:none;             /* logo 无论深浅底都用原始品牌色，不做提亮 */
  background:rgba(10,10,12,.86);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--nk-line);
  transition:background .24s ease,border-color .24s ease;
}
nav.nav-light{
  --nk:#17171b; --nk2:#5b5b66;
  --nk-line:rgba(0,0,0,.10);
  --nk-logo:none;
  background:rgba(255,255,255,.97);
}
/* 兜底：JS 未接管时（键盘 Tab 聚焦等）也能自动转白 */
@supports selector(:has(*)){
  nav:has(.nav-item:hover),nav:has(.nav-item:focus-within){
    --nk:#17171b; --nk2:#5b5b66;
    --nk-line:rgba(0,0,0,.10);
    --nk-logo:none;
    background:rgba(255,255,255,.97);
  }
}
.nav-in{max-width:1240px;margin:0 auto;padding:0 28px;height:66px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:baseline;gap:9px;font-weight:600;letter-spacing:.02em;font-size:17px;white-space:nowrap;color:var(--nk);transition:color .24s ease}
.brand span{color:var(--nk)}
.brand-logo{height:30px;width:auto;display:block;filter:var(--nk-logo);transition:filter .24s ease}
.nav-links{display:flex;gap:30px;font-size:14px;color:var(--nk2);transition:color .24s ease}
.nav-links a{transition:color .2s}
.nav-links a:hover{color:var(--nk)}
.nav-cta{
  background:var(--acc);color:#0a0a0c;padding:9px 18px;border-radius:5px;
  font-size:13px;font-weight:600;white-space:nowrap;transition:background .2s,opacity .2s;
}
.nav-cta:hover{background:#fff;opacity:.82}

/* hero —— 文案贴底：上方留给灯具与人物，底部深色区承载文字 */
.hero{position:relative;min-height:86vh;display:flex;align-items:flex-end;overflow:hidden;background:#0a0a0c}
.hero-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:65% center}
/* 双层遮罩：纵向压暗上下缘（承载文案），横向轻微压暗左侧（拉开与右侧人物的层次） */
.hero::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(180deg,
      rgba(10,10,12,.45) 0%,
      rgba(10,10,12,.05) 14%,
      rgba(10,10,12,0) 30%,
      rgba(10,10,12,.34) 52%,
      rgba(10,10,12,.70) 74%,
      rgba(10,10,12,.90) 89%,
      rgba(10,10,12,.96) 100%),
    linear-gradient(90deg,
      rgba(10,10,12,.72) 0%,
      rgba(10,10,12,.66) 22%,
      rgba(10,10,12,.46) 42%,
      rgba(10,10,12,.14) 60%,
      rgba(10,10,12,0) 76%,
      rgba(10,10,12,.14) 100%);
}
.hero-in{position:relative;z-index:2;width:100%;max-width:1240px;margin:0 auto;padding:0 28px 54px}
.hero-copy{max-width:580px}
.eyebrow{color:var(--acc);font-size:12px;letter-spacing:.22em;text-transform:uppercase;font-weight:600;margin-bottom:18px}
.hero h1{font-size:clamp(34px,5.2vw,62px);line-height:1.1;font-weight:600;letter-spacing:-.02em;margin-bottom:20px}
.hero h1 em{font-style:normal;color:var(--acc)}
.hero p{font-size:17px;color:var(--txt2);max-width:560px;margin-bottom:32px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.btn-gold{background:var(--acc);color:#1a1206;padding:13px 28px;border-radius:5px;font-weight:600;font-size:15px;transition:background .2s}
.btn-gold:hover{background:var(--acc2)}
.btn-ghost{border:1px solid var(--line2);padding:13px 28px;border-radius:5px;font-size:15px;color:var(--txt);transition:border-color .2s,color .2s}
.btn-ghost:hover{border-color:var(--acc);color:var(--acc2)}
.hero-stats{display:flex;gap:44px;margin-top:56px;flex-wrap:wrap}
.hero-stats div strong{display:block;font-size:26px;font-weight:600;color:var(--acc2)}
.hero-stats div span{font-size:12px;color:var(--txt3);letter-spacing:.06em;text-transform:uppercase}

/* overview */
.ov{padding:88px 0 24px}
.ov-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.ov-card{
  background:var(--card);border:1px solid var(--line);border-radius:10px;
  overflow:hidden;transition:border-color .25s,transform .25s;
}
.ov-card:hover{border-color:rgba(255,255,255,.42);transform:translateY(-3px)}
.ov-card img{width:100%;height:190px;object-fit:cover}
.ov-body{padding:22px}
.ov-body h3{font-size:19px;font-weight:600;margin-bottom:6px}
.ov-body .sub{color:var(--acc);font-size:12px;letter-spacing:.1em;text-transform:uppercase;margin-bottom:12px}
.ov-body p{font-size:14px;color:var(--txt2);margin-bottom:14px}
.ov-body .meta{font-size:13px;color:var(--txt3);border-top:1px solid var(--line);padding-top:12px}

/* series */
.series{padding:64px 0;border-top:1px solid var(--line);margin-top:40px}
.series-head{margin-bottom:36px}
.series-tag{
  display:inline-block;background:rgba(255,255,255,.07);color:var(--acc2);
  border:1px solid rgba(255,255,255,.26);padding:5px 13px;border-radius:20px;
  font-size:11px;letter-spacing:.14em;text-transform:uppercase;font-weight:600;margin-bottom:16px;
}
.series h2{font-size:clamp(28px,3.6vw,42px);font-weight:600;letter-spacing:-.01em;margin-bottom:10px}
.series h2 em{font-style:normal;color:var(--acc)}
.series .lede{font-size:16px;color:var(--txt2);max-width:720px}
.banner{width:100%;height:clamp(180px,26vw,340px);object-fit:cover;border-radius:10px;margin:32px 0 40px;border:1px solid var(--line)}

.two{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start;margin-bottom:44px}
.two img{width:100%;border-radius:10px;border:1px solid var(--line)}
.stack{display:grid;gap:14px}
.feats h4{font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--txt3);margin-bottom:18px;font-weight:600}
.feats ul{list-style:none}
.feats li{
  position:relative;padding-left:26px;margin-bottom:14px;font-size:15px;color:var(--txt2);
}
.feats li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;
  border-radius:50%;background:var(--acc);
}

/* spec table */
.spec-wrap{margin-bottom:32px}
.spec-title{font-size:15px;font-weight:600;margin-bottom:14px;color:var(--txt)}
.tbl-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:10px}
table{width:100%;border-collapse:collapse;font-size:14px;min-width:600px}
th{
  background:var(--card2);text-align:left;padding:14px 18px;font-weight:600;
  font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--txt2);
  border-bottom:1px solid var(--line);white-space:nowrap;
}
th:first-child{color:var(--txt3)}
td{padding:13px 18px;border-bottom:1px solid var(--line);color:var(--txt2);white-space:pre-line}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover td{background:rgba(255,255,255,.02)}
td:first-child{color:var(--txt);font-weight:500}

.incl{
  background:var(--card);border:1px solid var(--line);border-left:3px solid var(--acc);
  border-radius:0 8px 8px 0;padding:16px 22px;margin-bottom:40px;font-size:14px;color:var(--txt2);
  white-space:pre-line;
}
.incl b{color:var(--txt);display:block;margin-bottom:4px;font-size:12px;letter-spacing:.1em;text-transform:uppercase}

.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.gallery.g3{grid-template-columns:repeat(3,1fr)}
.gallery img{width:100%;height:170px;object-fit:cover;border-radius:8px;border:1px solid var(--line);transition:opacity .25s}
.gallery img:hover{opacity:.82}

/* apps */
.apps{padding:80px 0;border-top:1px solid var(--line)}
.apps h2,.about h2,.cta h2{font-size:clamp(26px,3.2vw,36px);font-weight:600;margin-bottom:12px}
.apps .lede,.about .lede{color:var(--txt2);max-width:640px;margin-bottom:36px}
.app-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.app-card{position:relative;border-radius:10px;overflow:hidden;height:260px}
.app-card img{width:100%;height:100%;object-fit:cover}
.app-card::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,rgba(10,10,12,.92) 100%)}
.app-card span{
  position:absolute;bottom:18px;left:20px;z-index:2;font-size:15px;font-weight:600;
}

/* about */
.about{padding:80px 0;border-top:1px solid var(--line)}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.about-grid img{border-radius:10px;border:1px solid var(--line)}
.about p{color:var(--txt2);margin-bottom:16px;font-size:15px}
.about-list{list-style:none;margin-top:22px}
.about-list li{padding:11px 0;border-bottom:1px solid var(--line);font-size:14px;color:var(--txt2);display:flex;justify-content:space-between;gap:20px}
.about-list li b{color:var(--txt);font-weight:500}

/* cta */
.cta{padding:80px 0;border-top:1px solid var(--line);text-align:center}
.cta .lede{color:var(--txt2);max-width:560px;margin:0 auto 32px}
.cta-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* footer */
footer{border-top:1px solid var(--line);padding:52px 0 32px;background:var(--bg2)}
/* 左侧品牌块 + 右侧三列导航（Product / About / Cooperation） */
.foot-grid{display:grid;grid-template-columns:minmax(200px,1fr) 2.4fr;gap:44px;margin-bottom:36px}
.foot-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}
.foot-brand .brand{font-size:19px;margin-bottom:14px}
.foot-brand p{color:var(--txt3);font-size:14px;max-width:320px}
.foot-col h5{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--txt3);margin-bottom:14px;font-weight:600}
.foot-col h5 a{transition:color .2s}
.foot-col h5 a:hover{color:var(--acc2)}
.foot-col a,.foot-col p{display:block;font-size:14px;color:var(--txt2);margin-bottom:9px}
.foot-col a:hover{color:var(--acc2)}
.foot-bot{border-top:1px solid var(--line);padding-top:22px;font-size:13px;color:var(--txt3);display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
/* 底栏右侧：社媒图标（取代原 tagline 的位置） */
.foot-bot{align-items:center}
.foot-social{display:flex;align-items:center;gap:16px}
.foot-social a{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;opacity:.9;transition:opacity .2s,transform .2s}
.foot-social a:hover{opacity:1;transform:translateY(-2px)}
.foot-social img{width:26px;height:26px;display:block;border-radius:50%}
@media(max-width:600px){.foot-social{gap:20px}}

@media(max-width:1180px){
  /* 五列太挤时先降成三列，品牌块回到整行上方 */
  .foot-grid{grid-template-columns:1fr;gap:30px}
  .foot-nav{grid-template-columns:repeat(3,minmax(0,1fr));gap:26px}
}
@media(max-width:960px){
  .foot-brand p{max-width:none}
}
@media(max-width:600px){
  .foot-nav{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
}
[id]{scroll-margin-top:120px}
@media(max-width:600px){
  .gallery,.gallery.g3{grid-template-columns:repeat(2,1fr)}
  .hero-stats{gap:28px}
  .hero-stats div strong{font-size:22px}
}

/* ===== 下拉菜单 ===== */
.nav-item{position:static}
.drop-toggle{display:inline-flex;align-items:center;gap:6px;cursor:pointer}
.caret{
  width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;
  border-top:5px solid currentColor;opacity:.65;transition:transform .2s;margin-top:2px;
}
.nav-item:hover .caret,.nav-item.open .caret{transform:rotate(180deg)}
.dropdown{
  position:absolute;top:calc(100% + 14px);left:50%;transform:translateX(-50%) translateY(-6px);
  min-width:238px;background:var(--card2);border:1px solid var(--line2);border-radius:9px;
  padding:8px;box-shadow:0 18px 40px rgba(0,0,0,.55);
  opacity:0;visibility:hidden;pointer-events:none;transition:opacity .18s,transform .18s,visibility .18s;
  z-index:120;
}
.dropdown::before{content:"";position:absolute;top:-15px;left:0;right:0;height:15px}
.nav-item:hover .dropdown,.nav-item:focus-within .dropdown,.nav-item.open .dropdown{
  opacity:1;visibility:visible;pointer-events:auto;transform:translateX(-50%) translateY(0);
}
/* 注意：这三条是 .dropdown a xx（0,2,x），特异性高于 .mega-item xx（0,1,x），
   白底导航下必须在这里就写深色，否则产品名会显示成白色看不见 */
.dropdown a{
  display:block;padding:10px 12px;border-radius:6px;font-size:14px;color:var(--nav-txt2);
  transition:background .16s,color .16s;
}
.dropdown a+a{margin-top:2px}
.dropdown a:hover{background:rgba(0,0,0,.04);color:var(--nav-txt)}
.dropdown a strong{display:block;font-weight:600;color:var(--nav-txt);font-size:14px}
.dropdown a em{display:block;font-style:normal;font-size:12px;color:var(--nav-txt2);margin-top:2px}

/* ===== 汉堡按钮（仅 <=960px 显示） ===== */
.nav-burger{
  display:none;width:42px;height:42px;margin-right:-9px;padding:0;
  background:none;border:none;cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-burger span{
  display:block;width:23px;height:2px;background:var(--nk);border-radius:2px;
  transition:transform .25s ease,opacity .18s ease,background .24s ease;
}
.nav-burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-burger.open span:nth-child(2){opacity:0}
.nav-burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== Mega Menu：桌面端整屏通栏（左边缘到右边缘铺满） ===== */
nav{overflow:visible}
@media(min-width:961px){
  /* 关键：让菜单项撑满整条导航的高度，消除"文字底部 → 面板顶部"之间的悬停死区 */
  .nav-links{height:100%;align-items:stretch}
  .nav-links > a{display:flex;align-items:center}
  .nav-item{display:flex;align-items:center;height:100%}

  .dropdown.mega{
    position:absolute;top:100%;left:0;right:0;width:auto;min-width:0;
    transform:translateY(-8px);
    background:rgba(255,255,255,.985);backdrop-filter:blur(20px);
    border:none;border-top:1px solid var(--nav-line);border-radius:0;
    padding:40px 40px 30px;
    box-shadow:0 34px 70px rgba(0,0,0,.16);
    opacity:0;visibility:hidden;pointer-events:none;
    transition:opacity .2s ease,transform .2s ease,visibility .2s;
    z-index:120;
  }
  /* 面板顶部与导航条重叠 6px，作为最后一道保险（不接收鼠标，避免全宽误触发） */
  .dropdown.mega::before{content:"";position:absolute;left:0;right:0;top:-6px;height:6px;pointer-events:none}
  .nav-item:hover .dropdown.mega,.nav-item:focus-within .dropdown.mega,.nav-item.open .dropdown.mega{
    opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0);
  }
  .mega-in{width:100%;max-width:1440px;margin:0 auto;display:grid;gap:34px}
  .mega-in.c3{grid-template-columns:repeat(3,1fr)}
  .mega-in.c4{grid-template-columns:repeat(4,1fr)}
  .mega-head{
    font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--nav-ink);
    font-weight:700;margin-bottom:16px;
  }
  .mega-item{
    display:block;padding:0;border:1px solid var(--nav-line);border-radius:10px;
    background:#fff;overflow:hidden;margin-bottom:14px;
    transition:border-color .2s,background .2s,transform .2s,box-shadow .2s;
  }
  .mega-item:hover{border-color:rgba(0,0,0,.28);background:#f6f6f8;transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,0,0,.09)}
  /* 产品图完整显示不裁切：contain + 内边距，白底图配白底 */
  .mega-item img{
    width:100%;height:176px;object-fit:contain;display:block;
    background:#fbfbfc;padding:12px 14px 16px;
  }
  .mega-item.iso img{background:#fff}
  .mega-item span{display:block;padding:13px 14px 15px}
  .mega-item strong{display:block;font-size:15px;font-weight:600;color:var(--nav-txt)}
  .mega-item em{display:block;font-style:normal;font-size:12.5px;color:var(--nav-txt2);margin-top:3px}
  .mega-list a{display:block;font-size:13.5px;color:var(--nav-txt2);padding:6px 0;border-bottom:1px solid var(--nav-line)}
  .mega-list a:last-child{border-bottom:none}
  .mega-list a:hover{color:var(--nav-ink)}
  /* 无图分组的目录式列表 */
  .mega-list.lg{border-top:1px solid var(--nav-line);margin-top:2px;padding-top:2px}
  .mega-list.lg a{padding:12px 0;border-bottom:1px solid var(--nav-line)}
  .mega-list.lg a strong{display:block;font-size:14.5px;font-weight:500;color:var(--nav-txt);transition:color .18s}
  .mega-list.lg a:hover strong{color:var(--nav-ink)}
  .mega-list.lg a em{display:block;font-style:normal;font-size:12.5px;color:var(--nav-txt2);margin-top:3px}
  .mega-foot{
    grid-column:1/-1;border-top:1px solid var(--nav-line);padding-top:18px;margin-top:6px;
    font-size:13px;color:var(--nav-txt2);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  }
  .mega-foot a{color:var(--nav-ink);font-weight:600}
  .mega-foot a:hover{text-decoration:underline}
}

/* ===== 多页结构新增 ===== */
.nav-links a.active{color:var(--nk)}
.page-hero{position:relative;min-height:40vh;display:flex;align-items:center;overflow:hidden;border-bottom:1px solid var(--line)}
.page-hero .hero-img{opacity:.38;object-position:center}
.page-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(10,10,12,.96) 0%,rgba(10,10,12,.82) 55%,rgba(10,10,12,.5) 100%)}
.page-hero .hero-in{padding-top:48px;padding-bottom:48px}
.page-hero h1{font-size:clamp(30px,4.2vw,50px)}
.page-hero p{margin-bottom:0}
.subnav{display:flex;gap:12px;flex-wrap:wrap;padding:26px 0 0}
.subnav a{
  border:1px solid var(--line2);border-radius:20px;padding:7px 18px;
  font-size:13px;color:var(--txt2);transition:all .2s;
}
.subnav a:hover{border-color:var(--acc);color:var(--acc2)}
/* 产品总览页：4 款型号卡片（2×2） */
.range-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.range-card{
  background:var(--card);border:1px solid var(--line);border-radius:10px;
  overflow:hidden;display:flex;flex-direction:column;
  transition:border-color .25s,transform .25s;
}
.range-card:hover{border-color:rgba(255,255,255,.42);transform:translateY(-3px)}
.range-card img{width:100%;height:220px;object-fit:contain;background:#fbfbfc;padding:16px}
.range-body{padding:24px;display:flex;flex-direction:column;flex:1}
.range-body .tag{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--txt3);margin-bottom:8px}
.range-body h3{font-size:21px;font-weight:600;margin-bottom:8px}
.range-body p{font-size:14px;color:var(--txt2);margin-bottom:14px}
.range-spec{font-size:13px;color:var(--txt3);border-top:1px solid var(--line);padding-top:12px;margin-bottom:16px}
.range-go{margin-top:auto;font-size:13.5px;font-weight:600;color:var(--txt2);transition:color .2s}
.range-card:hover .range-go{color:var(--acc)}
@media(max-width:960px){.range-grid{grid-template-columns:1fr}}
/* 详情页：当前型号高亮 */
.subnav a.on{border-color:rgba(255,255,255,.55);color:var(--acc);background:rgba(255,255,255,.06)}

/* accessories */
.acc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.acc-card{background:var(--card);border:1px solid var(--line);border-radius:10px;overflow:hidden;transition:border-color .25s}
.acc-card:hover{border-color:rgba(255,255,255,.42)}
.acc-card img{width:100%;height:200px;object-fit:cover}
.acc-body{padding:20px}
.acc-body .sub{color:var(--acc);font-size:11px;letter-spacing:.12em;text-transform:uppercase;margin-bottom:8px}
.acc-body h3{font-size:17px;font-weight:600;margin-bottom:8px}
.acc-body p{font-size:14px;color:var(--txt2);margin-bottom:10px}
.acc-body .meta{font-size:12px;color:var(--txt3);border-top:1px solid var(--line);padding-top:10px}
/* support */
.sup-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:56px}
.sup-card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:26px}
.sup-card h3{font-size:17px;font-weight:600;margin-bottom:10px}
.sup-card .ic{color:var(--acc);font-size:12px;letter-spacing:.14em;text-transform:uppercase;font-weight:600;margin-bottom:12px;display:block}
.sup-card p{font-size:14px;color:var(--txt2);margin-bottom:8px}
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  cursor:pointer;padding:18px 4px;font-size:15px;font-weight:500;color:var(--txt);
  list-style:none;display:flex;justify-content:space-between;gap:16px;align-items:center;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--acc);font-size:20px;flex-shrink:0}
.faq details[open] summary::after{content:"\2212"}
.faq details p{padding:0 4px 18px;font-size:14px;color:var(--txt2);max-width:760px}
.contact-band{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:36px;display:grid;grid-template-columns:1fr 1fr;gap:32px;margin:56px 0 0}
.contact-band h3{font-size:18px;font-weight:600;margin-bottom:8px}
.contact-band p{font-size:14px;color:var(--txt2);margin-bottom:6px}
.contact-band a{color:var(--acc2)}
.contact-band a:hover{text-decoration:underline}
@media(max-width:960px){
  .acc-grid{grid-template-columns:1fr}
  .sup-grid{grid-template-columns:1fr}
  .contact-band{grid-template-columns:1fr;padding:26px}
}

/* ===== 移动端导航：默认收起，点右上角汉堡展开 =====
   放在文件最末尾，确保覆盖前面的规则。 */
@media(max-width:960px){
  .nav-in{height:58px;flex-wrap:nowrap;padding:0 20px;gap:12px}
  .nav-burger{display:flex}

  /* 主菜单 = 从导航条下方铺下来的抽屉，默认隐藏 */
  .nav-links{
    display:none;
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    padding:4px 20px 18px;
    background:#fff;
    border-top:1px solid var(--nav-line);
    box-shadow:0 26px 54px rgba(0,0,0,.18);
    max-height:calc(100vh - 58px);overflow-y:auto;
    -webkit-overflow-scrolling:touch;
  }
  .nav-links.open{display:flex}
  .nav-links > a{
    display:block;padding:15px 2px;font-size:16px;color:var(--nav-txt);
    border-bottom:1px solid var(--nav-line);
  }
  .nav-links > a.active{color:var(--nk)}

  .nav-item{display:block;width:100%;position:static;border-bottom:1px solid var(--nav-line)}
  .drop-toggle{
    width:100%;justify-content:space-between;
    padding:15px 2px;font-size:16px;color:var(--nav-txt);
  }
  .drop-toggle.active{color:var(--nk)}
  .caret{width:0;height:0;margin-top:3px}

  /* 子菜单：点一下标题才展开 */
  .dropdown.mega{
    display:none;
    position:static;left:auto;right:auto;width:100%;max-width:none;min-width:0;
    transform:none;opacity:1;visibility:visible;pointer-events:auto;
    background:transparent;border:none;border-radius:0;box-shadow:none;
    padding:2px 0 12px;
  }
  .nav-item.open .dropdown.mega{display:block}
  /* 与 .nav-item.open .dropdown（0,3,0）同级特异性，抵消它的 translateX(-50%) */
  .nav-item.open .dropdown.mega,
  .nav-item:hover .dropdown.mega,
  .nav-item:focus-within .dropdown.mega{
    position:static;left:auto;right:auto;transform:none;
  }
  .dropdown.mega::before{display:none}

  .mega-in{width:100%;max-width:none;display:grid;gap:16px;padding:0}
  .mega-in.c3,.mega-in.c4{width:100%;max-width:none;grid-template-columns:1fr}
  .mega-head{
    font-size:11px;letter-spacing:.16em;text-transform:uppercase;
    color:var(--nav-ink);font-weight:700;margin-bottom:10px;
  }
  .mega-item{
    display:block;border:1px solid var(--nav-line);border-radius:10px;
    background:#fff;overflow:hidden;margin-bottom:12px;
  }
  .mega-item img{
    width:100%;height:190px;object-fit:contain;display:block;
    background:#fbfbfc;padding:12px 14px 16px;
  }
  .mega-item.iso img{background:#fff}
  .mega-item span{display:block;padding:11px 13px 13px}
  .mega-item strong{display:block;font-size:15px;font-weight:600;color:var(--nav-txt)}
  .mega-item em{display:block;font-style:normal;font-size:12.5px;color:var(--nav-txt2);margin-top:3px}
  .mega-list a{display:block;font-size:13.5px;color:var(--nav-txt2);padding:7px 0;border-bottom:1px solid var(--nav-line)}
  .mega-list a:last-child{border-bottom:none}
  .mega-list.lg{border-top:1px solid var(--nav-line);margin-top:2px;padding-top:2px}
  .mega-list.lg a{padding:11px 0}
  .mega-list.lg a strong{display:block;font-size:14.5px;font-weight:500;color:var(--nav-txt)}
  .mega-list.lg a em{display:block;font-style:normal;font-size:12.5px;color:var(--nav-txt2);margin-top:3px}
  .mega-foot{
    grid-column:1/-1;border-top:1px solid var(--nav-line);padding-top:14px;margin-top:4px;
    font-size:12.5px;color:var(--nav-txt2);display:flex;flex-direction:column;gap:8px;
  }
  .mega-foot a{color:var(--nav-ink);font-weight:600}
}

/* ===== Hero 移动端覆盖（放文件末尾，避免被前面同优先级的桌面规则按源顺序压掉）
   选择器一律带 .hero 前缀 —— .page-hero 复用 .hero-img / .hero-in，不带前缀会误伤内页。 */
@media(max-width:960px){
  /* 竖屏裁切窗口只有通栏的 1/5，硬 cover 会把人物切碎 —— 改为「上图下文案」 */
  .hero{display:block;min-height:0;padding:0}
  .hero .hero-img{position:absolute;top:0;left:0;width:100%;height:48vh;object-position:37% center}
  .hero::after{
    inset:0 0 auto 0;height:48vh;
    background:linear-gradient(180deg,
      rgba(10,10,12,.62) 0%,
      rgba(10,10,12,.06) 42%,
      rgba(10,10,12,.60) 82%,
      rgba(10,10,12,1) 100%);
  }
  .hero .hero-in{max-width:none;padding:calc(48vh + 26px) 22px 46px}
  .hero .hero-copy{max-width:none}
  .hero h1{font-size:31px;margin-bottom:14px}
  .hero p{font-size:15px;line-height:1.62;margin-bottom:26px}
  .hero .hero-stats{gap:20px 30px;margin-top:34px}
  .hero .hero-stats div strong{font-size:20px}
  .hero .hero-stats div span{font-size:10.5px}
}
@media(max-width:420px){
  .hero h1{font-size:27px}
  .hero .hero-in{padding:calc(48vh + 22px) 20px 38px}
  .hero .hero-stats{gap:18px 24px;margin-top:28px}
}