/* ==========================================================================
   富奥东机工减振器 · 企业导引页
   三个 TAB：企业简介 / 品牌介绍 / 合作咨询
   配色沿用手册封面的蓝，内容取自手册原文（企业概况、品牌页、封底联系方式）
   ========================================================================== */

:root{
  --blue:#1b4fa0;
  --blue-deep:#0f3272;
  --blue-mid:#2f6ac4;
  --blue-soft:#eef3fb;
  --ink:#16233a;
  --dim:#66748c;
  --line:#dde5f0;
  --bg:#f4f7fc;
  --card:#ffffff;
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --serif:"Songti SC","SimSun","Source Han Serif SC",Georgia,serif;
}

*{ box-sizing:border-box; -webkit-tap-highlight-color:transparent; }
html{ scroll-behavior:smooth; }
body{
  margin:0; background:var(--bg); color:var(--ink);
  font-family:var(--sans); -webkit-font-smoothing:antialiased;
  line-height:1.75;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
button{ font-family:inherit; }

/* ---------------- 顶部 ---------------- */

.topbar{
  position:sticky; top:0; z-index:30;
  background:rgba(255,255,255,.94); backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--line);
}
.topbar-in{
  max-width:1120px; margin:0 auto; padding:11px 20px;
  display:flex; align-items:center; gap:12px;
}
.mark{
  width:36px; height:36px; flex:0 0 auto; border-radius:9px;
  background:linear-gradient(140deg,var(--blue-mid),var(--blue-deep));
  color:#fff; display:flex; align-items:center; justify-content:center;
  font:700 19px/1 Arial,Helvetica,sans-serif;
}
.topbar .co{ font-size:13.5px; font-weight:600; line-height:1.35; }
.topbar .coen{ font-size:9px; letter-spacing:.13em; color:#93a0b4; }
.topbar .sp{ flex:1; }
.topbar .link{ font-size:12.5px; color:var(--blue); white-space:nowrap; }
.topbar .link:hover{ text-decoration:underline; }

/* ---------------- 语言切换 ---------------- */

.langsw{
  display:flex; flex:0 0 auto; overflow:hidden;
  border:1px solid var(--line); border-radius:999px; background:#fff;
}
.langsw button{
  border:0; background:none; cursor:pointer; padding:4px 11px;
  font-size:12px; color:var(--dim); line-height:1.6;
  transition:background .18s, color .18s;
}
.langsw button:not(.on):hover{ color:var(--blue); }
.langsw button.on{ background:var(--blue); color:#fff; font-weight:600; }

/* ---------------- 中英双语 ----------------
   html[data-lang] 决定显示哪一种；未标记的元素两种语言都显示 */
html[data-lang="cn"] [data-lang="en"]{ display:none !important; }
html[data-lang="en"] [data-lang="cn"]{ display:none !important; }

/* 英文模式下，标题本身已经是英文，小号英文副标就多余了 */
html[data-lang="en"] .tabs em{ display:none; }
html[data-lang="en"] .brand .en{
  font-size:18px; letter-spacing:.02em; color:var(--ink); margin-top:0;
}
html[data-lang="en"] .topbar .co{ font-size:12.5px; }
html[data-lang="en"] .hero .lead{ max-width:720px; }

/* ---------------- 大图头图 ---------------- */

.hero{
  position:relative; overflow:hidden; color:#fff;
  background:var(--blue-deep);
  min-height:min(62vh, 460px);
  display:flex; align-items:flex-end;
}
.hero-bg{
  position:absolute; inset:0;
  background-image:url(../corp/factory.jpg?v=8);
  background-size:cover; background-position:center 66%;
  opacity:.9;
}
.hero::after{
  content:""; position:absolute; inset:0;
  background:linear-gradient(180deg,
    rgba(15,50,114,.16) 0%,
    rgba(15,50,114,.40) 38%,
    rgba(15,50,114,.86) 72%,
    rgba(15,50,114,.97) 100%);
}
.hero-in{
  position:relative; z-index:2; max-width:1120px; margin:0 auto;
  padding:52px 20px 34px; width:100%;
}
.hero .kicker{ font-size:11px; letter-spacing:.3em; color:#a9c4ea; margin-bottom:10px; }
.hero h1{
  margin:0; font-size:clamp(26px,5.2vw,42px); font-weight:700; letter-spacing:.02em;
  line-height:1.25;
}
.hero h1 small{ display:block; font-size:clamp(11px,1.6vw,14px); font-weight:400;
  letter-spacing:.22em; color:#b9d0ef; margin-top:9px; }
.hero .lead{
  margin:16px 0 0; max-width:640px; font-size:14.5px; color:#d6e4f8;
}
.hero .lead b{ color:#fff; font-weight:600; }

/* ---------------- TAB ---------------- */

.tabs{
  position:sticky; top:59px; z-index:25;
  background:rgba(255,255,255,.96); backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--line);
}
.tabs-in{
  max-width:1120px; margin:0 auto; padding:0 20px;
  display:flex; gap:2px; overflow-x:auto; scrollbar-width:none;
}
.tabs-in::-webkit-scrollbar{ display:none; }
.tabs button{
  flex:0 0 auto; position:relative; cursor:pointer;
  background:none; border:0; padding:15px 18px 13px;
  font-size:14.5px; color:var(--dim); white-space:nowrap;
  transition:color .18s;
}
.tabs button em{ font-style:normal; font-size:10.5px; letter-spacing:.1em;
  color:#a9b4c5; margin-left:7px; }
.tabs button:hover{ color:var(--blue); }
.tabs button.on{ color:var(--blue); font-weight:600; }
.tabs button.on::after{
  content:""; position:absolute; left:12px; right:12px; bottom:0;
  height:3px; background:var(--blue); border-radius:3px 3px 0 0;
}

/* ---------------- 面板 ---------------- */

.wrap{ max-width:1120px; margin:0 auto; padding:34px 20px 0; }
.panel{ display:none; animation:fade .32s ease; }
.panel.on{ display:block; }
@keyframes fade{ from{ opacity:0; transform:translateY(8px); } to{ opacity:1; transform:none; } }

.sect-h{
  display:flex; align-items:baseline; gap:12px; flex-wrap:wrap;
  margin:0 0 18px; padding-bottom:12px; border-bottom:1px solid var(--line);
}
.sect-h h2{ margin:0; font-size:21px; font-weight:700; letter-spacing:.01em; }
.sect-h span{ font-size:11px; letter-spacing:.2em; color:#9aa7ba; }
.sect-h .more{ margin-left:auto; font-size:12.5px; color:var(--blue); }
.sect-h .more:hover{ text-decoration:underline; }

.block{ margin-bottom:38px; }
.block > h3{
  margin:0 0 4px; font-size:15.5px; font-weight:600;
}
.block > .en{ margin:0 0 12px; font-size:10.5px; letter-spacing:.18em; color:#9aa7ba; }
p{ margin:0 0 12px; }
.txt{ font-size:14.5px; color:#3a4658; }
.txt.en{ font-size:12.5px; color:#8792a4; line-height:1.7; font-style:italic; }

/* ---------------- 数据条 ---------------- */

.stats{
  display:grid; grid-template-columns:repeat(3,1fr); gap:1px;
  background:var(--line); border:1px solid var(--line); border-radius:12px; overflow:hidden;
  margin-bottom:34px;
}
.stat{ background:var(--card); padding:26px 20px; text-align:center; }
.stat .n{
  font:700 clamp(30px,4.6vw,44px)/1 Arial,Helvetica,sans-serif;
  color:var(--blue); letter-spacing:-.01em;
}
.stat .n sup{ font-size:.45em; vertical-align:super; margin-left:2px; }
.stat .l{ margin-top:10px; font-size:13px; color:var(--ink); font-weight:600; }
.stat .e{ font-size:10.5px; color:#9aa7ba; letter-spacing:.08em; margin-top:3px; }

/* ---------------- 三大支柱 ---------------- */

.pillars{ display:grid; grid-template-columns:repeat(3,1fr); gap:16px; }
.pillar{
  background:var(--card); border:1px solid var(--line); border-radius:12px;
  padding:22px 20px 20px; position:relative; overflow:hidden;
}
.pillar::before{
  content:""; position:absolute; left:0; top:0; bottom:0; width:3px;
  background:linear-gradient(180deg,var(--blue-mid),var(--blue-deep));
}
.pillar .idx{
  font:700 12px/1 Arial,Helvetica,sans-serif; color:#b6c4d8; letter-spacing:.1em;
}
.pillar h3{ margin:9px 0 3px; font-size:16px; font-weight:700; }
.pillar .en{ font-size:10.5px; letter-spacing:.12em; color:#9aa7ba; margin-bottom:11px; }
.pillar p{ font-size:13.5px; color:#48546a; margin:0; }
.pillar .en-p{ margin-top:9px; font-size:11.5px; color:#96a1b3; line-height:1.65; font-style:italic; }

/* ---------------- 品牌卡 ---------------- */

.brands{ display:grid; grid-template-columns:repeat(4,1fr); gap:14px; }
.brand{
  background:var(--card); border:1px solid var(--line); border-radius:12px;
  overflow:hidden; display:flex; flex-direction:column;
  transition:box-shadow .2s, transform .18s, border-color .2s;
}
.brand:hover{ box-shadow:0 12px 26px rgba(27,79,160,.13); transform:translateY(-2px); border-color:#c6d5ec; }
.brand .btop{ position:relative; aspect-ratio:16/9; overflow:hidden; background:#e9eef6; }
.brand .btop > img{ width:100%; height:100%; object-fit:cover; transition:transform .4s ease; }
.brand:hover .btop > img{ transform:scale(1.05); }
.brand .btop .logo{
  position:absolute; left:0; bottom:0; z-index:2;
  background:rgba(255,255,255,.94); padding:6px 12px 6px 10px;
  border-top-right-radius:10px;
}
.brand .btop .logo img{ height:22px; width:auto; display:block; }
.brand .bbody{ padding:14px 16px 14px; display:flex; flex-direction:column; flex:1; }
.brand .cn{ font-size:18px; font-weight:700; letter-spacing:.02em; }
.brand .en{ font-size:10px; letter-spacing:.18em; color:#9aa7ba; margin-top:3px; }
.brand .desc{ font-size:12.5px; color:#5b6879; margin-top:11px; flex:1; }
.brand .go{
  margin-top:13px; padding-top:11px; border-top:1px solid var(--line);
  display:flex; align-items:center; gap:8px; font-size:12.5px; color:var(--blue); font-weight:600;
}
.brand .go::after{
  content:""; width:6px; height:6px; margin-left:auto;
  border-top:1.6px solid currentColor; border-right:1.6px solid currentColor; transform:rotate(45deg);
}

/* ---------------- 合作咨询 ---------------- */

.contact{
  background:var(--card); border:1px solid var(--line); border-radius:14px;
  overflow:hidden; display:grid; grid-template-columns:1.05fr .95fr;
}
.contact-l{ padding:30px 30px 28px; }
.contact-l .quote{
  font-family:var(--serif); font-size:16.5px; line-height:1.95; color:#2b3a52;
  border-left:3px solid var(--blue); padding-left:16px; margin:0 0 10px;
}
.contact-l .quote-en{
  font-size:12px; color:#96a1b3; line-height:1.7; font-style:italic;
  padding-left:19px; margin:0 0 22px;
}
.clist{ list-style:none; margin:0; padding:0; display:grid; gap:13px; }
.clist li{ display:flex; gap:13px; align-items:flex-start; font-size:13.5px; }
.clist .k{
  flex:0 0 92px; color:#9aa7ba; font-size:12px; padding-top:1px;
}
.clist .v{ color:#2f3d54; }
.clist .v a{ color:var(--blue); }
.clist .v a:hover{ text-decoration:underline; }
.clist .v small{ display:block; color:#9aa7ba; font-size:11px; margin-top:1px; }

.cta{ display:flex; gap:10px; flex-wrap:wrap; margin-top:24px; }
.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:11px 18px; border-radius:9px; font-size:13.5px; font-weight:600;
  border:1px solid transparent; transition:background .18s, transform .12s, box-shadow .18s;
}
.btn:active{ transform:scale(.98); }
.btn-primary{ background:var(--blue); color:#fff; }
.btn-primary:hover{ background:var(--blue-mid); box-shadow:0 6px 16px rgba(27,79,160,.24); }
.btn-ghost{ border-color:var(--line); color:var(--blue); background:#fff; }
.btn-ghost:hover{ border-color:var(--blue); }

.contact-r{ position:relative; background:linear-gradient(160deg,#123a7d,#2f6ac4); }
.contact-r img{ width:100%; height:100%; object-fit:cover; opacity:.92; }
.contact-r .ov{
  position:absolute; inset:0;
  background:linear-gradient(180deg,rgba(18,58,125,.25),rgba(18,58,125,.6));
}

/* ---------------- 页脚 ---------------- */

.foot{
  max-width:1120px; margin:46px auto 0; padding:22px 20px calc(env(safe-area-inset-bottom,0px) + 34px);
  border-top:1px solid var(--line); color:#7d8899; font-size:12px;
  display:flex; flex-wrap:wrap; gap:6px 18px; align-items:center;
}
.foot .r{ margin-left:auto; color:var(--ink); font-weight:600; }

/* ---------------- 窄屏 ---------------- */

@media (max-width:900px){
  .pillars{ grid-template-columns:1fr; }
  .brands{ grid-template-columns:repeat(3,1fr); }
  .contact{ grid-template-columns:1fr; }
  .contact-r{ min-height:200px; }
}
@media (max-width:640px){
  .hero-in{ padding:40px 16px 26px; }
  .wrap{ padding:26px 16px 0; }
  .stats{ grid-template-columns:1fr; }
  .stat{ padding:18px 16px; }
  .stat .n{ font-size:34px; }
  .brands{ grid-template-columns:repeat(2,1fr); }
  .tabs button{ padding:13px 13px 11px; font-size:13.5px; }
  .tabs button em{ display:none; }
  .tabs{ top:55px; }
  .contact-l{ padding:22px 18px; }
  .clist li{ flex-direction:column; gap:2px; }
  .clist .k{ flex:none; }
}
@media (prefers-reduced-motion: reduce){
  *{ animation-duration:.01ms !important; transition-duration:.01ms !important; }
  html{ scroll-behavior:auto; }
}

/* ==========================================================================
   首页第 4 个板块：商品目录
   复用 shop.css 的卡片样式，这里只做容器与排版的适配
   ========================================================================== */

#tab-catalog .sect-h{ margin-bottom:4px; }
#tab-catalog .tools{ padding:16px 0 2px; }
#tab-catalog .chips{ max-width:none; margin:0; padding:10px 0 14px; }
#tab-catalog .list{
  grid-template-columns:repeat(auto-fill, minmax(205px, 1fr));
  gap:14px;
}
#tab-catalog .pager{ max-width:none; margin:0; padding:22px 0 6px; }
#tab-catalog .card .badge{
  background:var(--blue-soft); color:var(--blue);
}
#tab-catalog .card .part{
  color:var(--blue); background:var(--blue-soft);
}
#tab-catalog .card .foot .fol{ color:var(--blue); }
#tab-catalog .empty{ padding:60px 20px; }

@media (max-width:640px){
  #tab-catalog .list{ grid-template-columns:repeat(auto-fill, minmax(148px, 1fr)); gap:10px; }
  #tab-catalog .tools{ padding:14px 0 0; }
  #tab-catalog .tools .search{ flex:1 1 100%; }
  #tab-catalog .tools select{ flex:1 1 auto; }
}