:root{
  --bg:#070b12;
  --panel:#0e1520;
  --text:#e6ecff;
  --muted:#a6b5d6;
  --line:rgba(255,255,255,.08);
  --brand:#8fb4ff;
}

/* 基础 */
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:Inter,"Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:inherit}
img{max-width:100%;display:block}

.container{width:min(1200px,92vw);margin:0 auto}
.section{padding:clamp(24px,6vw,64px) 0}
.section.dark{background:#0b111b}
.two{display:grid;grid-template-columns:1.2fr .8fr;gap:clamp(16px,4vw,32px)}
@media (max-width:900px){.two{grid-template-columns:1fr}}

/* 跳转到内容 */
.skip-link{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip-link:focus{position:fixed;left:12px;top:12px;width:auto;height:auto;padding:8px 12px;background:#fff;color:#000;border-radius:6px;z-index:10000}

/* 顶部工具条 */
.util{background:#0a111b;color:#b8c7e6;border-bottom:1px solid var(--line);font-size:.9rem}
.util-in{display:flex;align-items:center;justify-content:space-between;padding:8px 0}
.util .util-link{margin-right:16px;text-decoration:none}
.util .lang{background:transparent;border:0;color:#cfe0ff;cursor:pointer}
.util .sep{opacity:.5;margin:0 6px}

/* ===== Masthead（导航） ===== */
.mast{
  position:sticky;top:0;z-index:10;
  background:linear-gradient(180deg,#0a1018,#0a1018dd);
  backdrop-filter:saturate(1.2) blur(6px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;padding:10px 0}

/* 只放大左上角 LOGO：与 Contact 按钮视觉接近，不改变整行高度 */
.mast .brand{display:flex;align-items:center}
.mast .brand img{
  height:160px;         /* 实际可视高度，与你要的 Contact 按钮差不多 */
  max-height:80px;     /* 防止撑开导航高度 */
  width:auto;
}

/* 主导航 */
.main{display:flex;gap:18px;align-items:center}
.main a{text-decoration:none;color:#dbe6ff}
.mitem{position:relative}

/* Mega 菜单 */
.has-mega:hover .mega{opacity:1;visibility:visible;transform:translateY(0)}
.mega{
  position:absolute;left:0;top:calc(100% + 8px);
  display:grid;grid-template-columns:repeat(3,1fr);gap:18px;
  background:var(--panel);padding:16px;border:1px solid var(--line);border-radius:12px;
  min-width:600px;opacity:0;visibility:hidden;transform:translateY(6px);transition:.2s ease;
}
.mega .mm{width:36px;height:24px;object-fit:cover;border-radius:6px;margin-right:8px}
.mega a{display:flex;align-items:center;gap:8px;padding:6px 8px;border-radius:8px;text-decoration:none;color:#cfe0ff}
.mega a:hover{background:rgba(255,255,255,.06)}
.mega h4{margin:.2rem 0 .4rem;font-size:.95rem;color:#fff}
.mega .hint{color:#8fb4ff;font-weight:600}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 16px;border-radius:10px;text-decoration:none;border:1px solid var(--line);cursor:pointer}
.btn-primary{background:var(--brand);color:#04122b;border-color:transparent;font-weight:700}
.btn-ghost{background:transparent;color:#cfe0ff}

/* ===== HERO / BANNER 区域 ===== */
.hero.carousel{
  position:relative;overflow:hidden;
  background:radial-gradient(1200px 600px at 50% 50%,#101826 0%,#0a0f18 60%,#070b12 100%);
  color:#fff;
}
.hero.carousel .slides{position:relative}

/* ★ 横幅高度控制 —— 关键参数
   min-height:clamp(320px,55vw,640px);
   - 第一个值 320px：最小高度（小屏手机）
   - 第二个值 55vw：根据视口宽度动态变化
   - 第三个值 640px：最大高度（大屏桌面）
   想要更高或更矮，只需修改这里的 clamp 值
*/
.hero.carousel .slide{
  position:relative;display:none;align-items:center;justify-content:center;
  min-height:clamp(320px,55vw,640px);
  padding:clamp(16px,4vw,40px);text-align:center;
}
.hero.carousel .slide.is-active{display:flex}
.hero.carousel .slide img{
  max-width:min(95vw,1800px);
  max-height:min(50vw,600px);
  width:auto;height:auto;object-fit:contain;
  filter:drop-shadow(0 12px 40px rgba(0,0,0,.45));
}
.hero.carousel .hcopy{
  position:absolute;left:50%;transform:translateX(-50%);
  bottom:clamp(16px,4vw,48px);
  width:min(92vw,1100px);
}
.hero.carousel h1{font-size:clamp(22px,3.4vw,40px);margin:0 0 8px}
.hero.carousel p{opacity:.9;margin:0 0 16px}
.hero.carousel .cta-row{display:inline-flex;gap:12px;flex-wrap:wrap;justify-content:center}
.hero.carousel .c-prev,.hero.carousel .c-next{
  position:absolute;top:50%;transform:translateY(-50%);
  width:44px;height:44px;border-radius:999px;border:0;background:rgba(255,255,255,.08);
  color:#fff;font-size:28px;cursor:pointer;
}
.hero.carousel .c-prev{left:10px}
.hero.carousel .c-next{right:10px}
.hero.carousel .c-prev:hover,.hero.carousel .c-next:hover{background:rgba(255,255,255,.16)}
.hero.carousel .dots{position:absolute;left:50%;transform:translateX(-50%);bottom:10px;display:flex;gap:8px}
.hero.carousel .dots button{width:10px;height:10px;border-radius:50%;border:0;background:rgba(255,255,255,.35);cursor:pointer}
.hero.carousel .dots button[aria-selected="true"]{background:#fff}

/* ===== 产品宫格 ===== */
.tiles{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(12px,2vw,20px)}
@media (max-width:1080px){.tiles{grid-template-columns:repeat(3,1fr)}}
@media (max-width:780px){.tiles{grid-template-columns:repeat(2,1fr)}}
@media (max-width:480px){.tiles{grid-template-columns:1fr}}

.tile{
  display:grid;grid-template-rows:auto auto;gap:10px;
  padding:12px;background:var(--panel);border:1px solid var(--line);
  border-radius:14px;text-decoration:none;transition:transform .2s ease,border-color .2s ease;
}
.tile:hover{transform:translateY(-3px);border-color:rgba(255,255,255,.18)}
.tile .thumb{
  margin:0;width:100%;aspect-ratio:4/3;background:linear-gradient(180deg,#0e1520,#0a111b);
  border-radius:10px;display:flex;align-items:center;justify-content:center;overflow:hidden;
}
.tile .thumb img{max-width:100%;max-height:100%;object-fit:contain}
.tile .tile-meta{display:flex;align-items:center;justify-content:space-between;gap:8px}
.tile .title{color:#fff;font-weight:600}
.tile .detail{color:var(--brand);font-weight:600;font-size:.95rem}

/* 关键参数 */
.stats-in{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;text-align:center}
.stats strong{font-size:1.4rem}
.stats span{display:block;color:var(--muted)}

/* 行业卡片 */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media (max-width:900px){.grid3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.grid3{grid-template-columns:1fr}}
.card{
  display:grid;gap:10px;padding:12px;background:var(--panel);border:1px solid var(--line);border-radius:14px;
  text-decoration:none;color:#dbe6ff
}
.card img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:10px}

/* 资源区 2x4 */
.band{background:linear-gradient(180deg,#0b111b,#0a0f18)}
.res-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(12px,2vw,18px)}
@media (max-width:1080px){.res-cards{grid-template-columns:repeat(3,1fr)}}
@media (max-width:780px){.res-cards{grid-template-columns:repeat(2,1fr)}}
@media (max-width:480px){.res-cards{grid-template-columns:1fr}}
.res-card{
  display:grid;grid-template-rows:auto auto;gap:10px;padding:12px;background:var(--panel);
  border:1px solid var(--line);border-radius:14px;text-decoration:none;color:#cfe0ff
}
.res-card:hover{border-color:rgba(255,255,255,.18);color:#fff}
.res-card .thumb{
  margin:0;aspect-ratio:4/3;border-radius:10px;overflow:hidden;background:linear-gradient(180deg,#0e1520,#0a111b);
  display:flex;align-items:center;justify-content:center
}
.res-card .thumb img{max-width:100%;max-height:100%;object-fit:contain}
.res-card span{font-weight:600}

/* About / Contact */
.panel{padding:16px;background:#0f1726;border:1px solid var(--line);border-radius:12px;color:#cfe0ff}
.form{display:grid;gap:10px}
.form input,.form textarea{background:#0e1520;border:1px solid var(--line);color:#e6ecff;border-radius:10px;padding:10px}
.form button{justify-self:start}

/* Footer */
.global-footer{border-top:1px solid var(--line);padding:24px 0;background:#0a1018}
.fgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media (max-width:780px){.fgrid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:500px){.fgrid{grid-template-columns:1fr}}
.global-footer h4{margin:.2rem 0 .6rem}
.global-footer a{text-decoration:none;color:#b8c7e6;display:block;margin:.25rem 0}

/* === Industry detail pages: center layout (telecom/energy/... HTML) === */

/* 统一各 section 的内容宽度并水平居中 */
.page section { 
  width: min(1100px, 92vw);
  margin: 0 auto;
}

/* 面包屑通常左对齐，如也需居中可解除注释 */
// .page .breadcrumb { text-align: center; }

/* 页面主标题与副标题居中 */
.page .page-header {
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

/* 行业页首图（industry-hero）水平居中，避免拉满导致看不出居中 */
.page .industry-hero {
  display: flex;
  justify-content: center;
}
.page .industry-hero img{
  display: block;
  margin: 0 auto;
  width: auto;               /* 不再强制 100% */
  max-width: min(86%, 900px);/* 视觉上留边，看得出居中 */
  height: auto;
}

/* 各板块标题与正文居中 */
.page .painpoints,
.page .solution,
.page .downloads,
.page .cta {
  text-align: center;
}

/* 痛点列表：区块整体居中，但项目内容保持左对齐可读性 */
.page .painpoints ul{
  display: inline-block;   /* 让列表整体作为“块”被居中 */
  text-align: left;        /* 列表项内部左对齐 */
  margin: 12px auto 0;
  padding-left: 1.2em;     /* 预留项目符号缩进 */
}

/* 下载与 CTA 按钮在容器中居中 */
.page .downloads .btn,
.page .cta .btn{
  display: inline-flex;
  margin: 8px auto 0;
}

/* 如有内嵌插图（非 hero），也保持居中与自适应 */
.page .solution img,
.page .downloads img{
  display: block;
  margin: 12px auto;
  height: auto;
  max-width: 100%;
  object-fit: contain;
}