/* =========================================================
   公共样式  styles.css  —— 工业稳重风格
   主色：深蓝  强调：工程橙  中性：灰白
   ========================================================= */
:root{
  --navy:#0f2a43;        /* 主深蓝 */
  --navy-2:#163a5c;      /* 次深蓝 */
  --steel:#274c6e;       /* 钢青 */
  --accent:#e0812a;      /* 工程橙（强调/按钮） */
  --accent-d:#c56a17;
  --ink:#1f2733;         /* 正文 */
  --muted:#6a7686;       /* 次要文字 */
  --line:#e3e8ef;        /* 分隔线 */
  --bg:#ffffff;
  --bg-soft:#f4f7fa;     /* 浅背景 */
  --radius:10px;
  --shadow:0 6px 24px rgba(15,42,67,.08);
  --maxw:1180px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB","Segoe UI",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--navy);color:#cdd9e6;font-size:13px}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar a{color:#cdd9e6}
.topbar .tb-right span{margin-left:18px}

/* ---------- 头部导航 ---------- */
.header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.header .container{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:12px}
.logo .mark{width:40px;height:40px;border-radius:8px;background:linear-gradient(135deg,var(--navy),var(--steel));
  display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:18px;letter-spacing:-1px}
.logo .name{font-size:20px;font-weight:800;color:var(--navy);line-height:1.1}
.logo .name small{display:block;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:1px}
.nav{display:flex;gap:6px;align-items:center}
.nav a{padding:10px 16px;border-radius:8px;color:var(--ink);font-size:15px;font-weight:600;position:relative}
.nav a:hover{color:var(--navy);background:var(--bg-soft)}
.nav a.active{color:var(--navy)}
.nav a.active::after{content:"";position:absolute;left:16px;right:16px;bottom:4px;height:3px;border-radius:3px;background:var(--accent)}
.header .call{margin-left:14px;background:var(--accent);color:#fff;font-weight:700;padding:10px 18px;border-radius:8px;font-size:14px}
.header .call:hover{background:var(--accent-d)}
.burger{display:none;font-size:26px;color:var(--navy);cursor:pointer;user-select:none}

/* ---------- 通用页头 banner ---------- */
.pagehead{background:linear-gradient(120deg,var(--navy),var(--steel));color:#fff;padding:60px 0}
.pagehead h1{font-size:34px;font-weight:800;margin-bottom:12px}
.pagehead p{color:#c7d5e4;font-size:16px;max-width:640px}
.crumb{font-size:13px;color:#9fb4c9;margin-bottom:14px}
.crumb a:hover{color:#fff}

/* ---------- Hero ---------- */
.hero{position:relative;background:linear-gradient(120deg,var(--navy) 0%,var(--navy-2) 55%,var(--steel) 100%);color:#fff;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;opacity:.12;
  background-image:linear-gradient(#fff 1px,transparent 1px),linear-gradient(90deg,#fff 1px,transparent 1px);
  background-size:46px 46px;-webkit-mask-image:linear-gradient(120deg,#000,transparent 70%);mask-image:linear-gradient(120deg,#000,transparent 70%)}
.hero .container{position:relative;padding:88px 22px;display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.hero .eyebrow{display:inline-block;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);
  color:#dceaf8;font-size:13px;font-weight:600;padding:6px 14px;border-radius:30px;margin-bottom:20px}
.hero h1{font-size:44px;line-height:1.25;font-weight:800;white-space:pre-line;margin-bottom:18px}
.hero .desc{color:#c7d5e4;font-size:17px;white-space:pre-line;margin-bottom:30px}
.hero .btns{display:flex;gap:14px;flex-wrap:wrap}
.hero .visual{display:flex;align-items:center;justify-content:center}
.hero .visual .panel{width:100%;aspect-ratio:4/3;border-radius:16px;border:1px solid rgba(255,255,255,.18);
  background:repeating-linear-gradient(45deg,rgba(255,255,255,.05),rgba(255,255,255,.05) 12px,transparent 12px,transparent 24px),rgba(255,255,255,.06);
  display:flex;align-items:center;justify-content:center;color:#9fb4c9;font-size:14px;text-align:center;padding:20px}
.hero .visual img{width:100%;aspect-ratio:4/3;object-fit:cover;display:block;border-radius:16px;
  box-shadow:0 12px 34px rgba(0,0,0,.28);border:1px solid rgba(255,255,255,.15)}

/* ---------- 按钮 ---------- */
.btn{display:inline-block;padding:14px 30px;border-radius:9px;font-weight:700;font-size:15px;cursor:pointer;transition:.2s;border:none}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-d)}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.6)}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-line{background:#fff;color:var(--navy);border:1.5px solid var(--line)}
.btn-line:hover{border-color:var(--accent);color:var(--accent)}

/* ---------- Section ---------- */
.section{padding:72px 0}
.section.soft{background:var(--bg-soft)}
.sec-head{text-align:center;max-width:680px;margin:0 auto 46px}
.sec-head .eyebrow{color:var(--accent);font-weight:700;font-size:14px;letter-spacing:1px}
.sec-head h2{font-size:30px;font-weight:800;color:var(--navy);margin:8px 0 12px}
.sec-head p{color:var(--muted);font-size:16px}

/* ---------- 数字实力 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:-52px;position:relative;z-index:5}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);
  padding:28px 20px;text-align:center}
.stat .num{font-size:34px;font-weight:800;color:var(--navy)}
.stat .num b{color:var(--accent)}
.stat .label{color:var(--muted);font-size:14px;margin-top:4px}

/* ---------- 核心优势 ---------- */
.features{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.feature{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 24px;transition:.2s}
.feature:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:transparent}
.feature .ic{width:54px;height:54px;border-radius:12px;background:var(--bg-soft);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.feature .ic svg{width:28px;height:28px;stroke:var(--navy)}
.feature h3{font-size:18px;color:var(--navy);margin-bottom:8px}
.feature p{color:var(--muted);font-size:14.5px}

/* ---------- 产品卡 ---------- */
.pgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.pcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.2s;display:flex;flex-direction:column}
.pcard:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.pcard .thumb{aspect-ratio:16/11;background:
   repeating-linear-gradient(45deg,#eef2f6,#eef2f6 10px,#e7edf3 10px,#e7edf3 20px);
   display:flex;align-items:center;justify-content:center;color:#9fb0c2;font-size:13px;border-bottom:1px solid var(--line)}
.pcard .thumb img{width:100%;height:100%;object-fit:cover}
.pcard .body{padding:18px 20px 22px;flex:1;display:flex;flex-direction:column}
.pcard .tag{align-self:flex-start;font-size:12px;color:var(--accent);background:#fdf1e6;padding:3px 10px;border-radius:30px;margin-bottom:10px;font-weight:600}
.pcard h3{font-size:18px;color:var(--navy);margin-bottom:6px}
.pcard .mat{font-size:13px;color:var(--muted);margin-bottom:8px}
.pcard .mat b{color:var(--steel);font-weight:600}
.pcard p{font-size:14px;color:var(--muted);margin-top:auto}

/* ---------- 筛选标签 ---------- */
.filters{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-bottom:36px}
.filters button{border:1px solid var(--line);background:#fff;color:var(--ink);padding:8px 18px;border-radius:30px;font-size:14px;cursor:pointer;font-weight:600;transition:.15s}
.filters button:hover{border-color:var(--accent);color:var(--accent)}
.filters button.active{background:var(--navy);color:#fff;border-color:var(--navy)}

/* ---------- 资讯列表 ---------- */
.nlist{display:grid;grid-template-columns:1fr;gap:16px}
.nitem{display:flex;gap:22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 26px;align-items:center;transition:.2s}
.nitem:hover{box-shadow:var(--shadow);border-color:transparent;transform:translateX(4px)}
.nitem .date{flex:0 0 92px;text-align:center;border-right:1px solid var(--line);padding-right:18px}
.nitem .date .d{font-size:26px;font-weight:800;color:var(--navy)}
.nitem .date .m{font-size:13px;color:var(--muted)}
.nitem .ntag{display:inline-block;font-size:12px;color:var(--steel);background:var(--bg-soft);padding:2px 10px;border-radius:30px;margin-bottom:6px;font-weight:600}
.nitem h3{font-size:18px;color:var(--navy);margin-bottom:6px}
.nitem p{font-size:14px;color:var(--muted)}
.nitem .go{margin-left:auto;color:var(--accent);font-weight:700;flex:0 0 auto}

/* ---------- 关于缩略（首页） ---------- */
.about-wrap{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.about-wrap .a-visual{aspect-ratio:5/4;border-radius:16px;background:linear-gradient(135deg,var(--steel),var(--navy));
   display:flex;align-items:center;justify-content:center;color:#cfe0f0;font-size:14px;overflow:hidden}
.about-wrap .a-visual img{width:100%;height:100%;object-fit:cover;display:block}
.about-wrap h2{font-size:28px;color:var(--navy);margin-bottom:16px}
.about-wrap p{color:var(--muted);margin-bottom:22px}
.about-list{list-style:none;margin-bottom:24px}
.about-list li{padding:8px 0 8px 30px;position:relative;color:var(--ink)}
.about-list li::before{content:"";position:absolute;left:0;top:14px;width:16px;height:16px;border-radius:4px;background:var(--accent);
   clip-path:polygon(0 0,35% 0,35% 100%,0 100%);box-shadow:6px 0 0 -2px var(--navy)}

/* ---------- CTA 条 ---------- */
.cta{background:linear-gradient(120deg,var(--navy),var(--steel));color:#fff;border-radius:18px;padding:48px;text-align:center}
.cta h2{font-size:28px;margin-bottom:10px}
.cta p{color:#c7d5e4;margin-bottom:26px}

/* ---------- 联系页 ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:36px;align-items:start}
.cinfo{background:var(--bg-soft);border-radius:var(--radius);padding:30px}
.cinfo h3{color:var(--navy);font-size:20px;margin-bottom:20px}
.crow{display:flex;gap:14px;margin-bottom:20px;align-items:flex-start}
.crow .ic{width:42px;height:42px;flex:0 0 42px;border-radius:10px;background:#fff;border:1px solid var(--line);display:flex;align-items:center;justify-content:center}
.crow .ic svg{width:20px;height:20px;stroke:var(--accent)}
.crow .k{font-size:13px;color:var(--muted)}
.crow .v{font-size:16px;color:var(--ink);font-weight:600}
.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px}
.form h3{color:var(--navy);font-size:20px;margin-bottom:6px}
.form .note{color:var(--muted);font-size:13px;margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;color:var(--ink);margin-bottom:6px;font-weight:600}
.field input,.field textarea{width:100%;border:1px solid var(--line);border-radius:8px;padding:12px 14px;font-size:15px;font-family:inherit;background:#fff}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--accent)}
.field textarea{resize:vertical;min-height:110px}
.form .btn{width:auto}

/* ---------- 页脚 ---------- */
.footer{background:#0b1e30;color:#9fb0c2;padding:56px 0 0;margin-top:0}
.footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;padding-bottom:40px}
.footer h4{color:#fff;font-size:16px;margin-bottom:16px}
.footer .fbrand .name{font-size:20px;font-weight:800;color:#fff;margin-bottom:12px}
.footer .fbrand p{font-size:14px;max-width:280px}
.footer a.fl{display:block;font-size:14px;padding:5px 0;color:#9fb0c2}
.footer a.fl:hover{color:#fff}
.footer .fcontact li{list-style:none;font-size:14px;padding:5px 0}
.footer .bar{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;text-align:center;font-size:13px;color:#6f8299}
.footer .bar a{color:#6f8299}
.footer .bar a:hover{color:#fff}

/* ---------- 核心优势（产品页 3列） ---------- */
.adv{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}

/* ---------- 应用领域 ---------- */
.appl-lead{max-width:760px;margin:0 auto 30px;text-align:center;color:var(--muted);font-size:15px;background:var(--bg-soft);border:1px dashed var(--line);border-radius:10px;padding:14px 18px}
.apps{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.app{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;transition:.2s;border-left:4px solid var(--steel)}
.app:hover{box-shadow:var(--shadow);border-left-color:var(--accent);transform:translateY(-3px)}
.app h4{font-size:17px;color:var(--navy);margin-bottom:8px}
.app .aparts{font-size:14px;color:var(--ink);margin-bottom:10px}
.app .afocus{font-size:12.5px;color:var(--muted)}
.app .afocus span{color:var(--accent);font-weight:600;margin-right:4px}

/* ---------- 产品详情 ---------- */
.pcard .pmore{margin-top:12px;color:var(--accent);font-weight:700;font-size:14px}
.pcard:hover .pmore{text-decoration:underline}
.pd-head h1{margin-bottom:0}
.pd-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:44px;align-items:start}
.pd-img{aspect-ratio:4/3;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:
   repeating-linear-gradient(45deg,#eef2f6,#eef2f6 12px,#e7edf3 12px,#e7edf3 24px);
   display:flex;align-items:center;justify-content:center;color:#9fb0c2;font-size:14px;text-align:center;line-height:1.8}
.pd-img img{width:100%;height:100%;object-fit:cover}
.p-thumbs{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.p-thumbs img{width:72px;height:56px;object-fit:cover;border:1px solid var(--line);border-radius:6px}
.pd-tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.chip{font-size:13px;font-weight:600;color:var(--navy);background:var(--bg-soft);border:1px solid var(--line);padding:4px 12px;border-radius:30px}
.chip.soft{color:var(--steel)}
.pd-desc{font-size:17px;color:var(--ink);margin-bottom:22px}
.spec-table{width:100%;border-collapse:collapse;margin-bottom:26px;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.spec-table th,.spec-table td{text-align:left;padding:12px 16px;border-bottom:1px solid var(--line);font-size:15px;vertical-align:top}
.spec-table th{width:34%;background:var(--bg-soft);color:var(--muted);font-weight:600;white-space:nowrap}
.spec-table td{color:var(--ink)}
.spec-table tr:last-child th,.spec-table tr:last-child td{border-bottom:none}
.pd-btns{display:flex;gap:14px;flex-wrap:wrap}
.pd-detail{padding-top:56px;padding-bottom:56px}
.pd-h2{font-size:24px;color:var(--navy);margin-bottom:16px}
.pd-summary{color:var(--ink);font-size:16px;max-width:820px;line-height:1.9}
.pd-h3{font-size:18px;color:var(--navy);margin:28px 0 12px}
.pd-apps{display:flex;gap:10px;flex-wrap:wrap}

/* ---------- 资讯详情页 ---------- */
.art-wrap{display:grid;grid-template-columns:1fr 300px;gap:48px;align-items:start}
.post-body{max-width:760px}
.post-body p{font-size:16.5px;color:var(--ink);line-height:1.95;margin-bottom:18px}
.post-body p:first-child::before{content:"";display:block;width:46px;height:4px;border-radius:4px;background:var(--accent);margin-bottom:22px}
.art-side{position:sticky;top:86px;background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:22px 20px}
.art-side h4{font-size:16px;color:var(--navy);margin-bottom:14px}
.side-post{display:block;padding:12px 0;border-top:1px solid var(--line)}
.side-post:first-of-type{border-top:none;padding-top:0}
.side-post span{display:block;font-size:14.5px;color:var(--ink);font-weight:600;line-height:1.5}
.side-post em{display:block;font-style:normal;font-size:12.5px;color:var(--muted);margin-top:4px}
.side-post:hover span{color:var(--accent)}

/* ---------- 响应式 ---------- */
@media(max-width:920px){
  .hero .container{grid-template-columns:1fr;padding:60px 22px}
  .hero h1{font-size:34px}
  .stats,.features,.pgrid,.adv,.apps{grid-template-columns:repeat(2,1fr)}
  .about-wrap,.contact-grid,.pd-grid,.art-wrap{grid-template-columns:1fr;gap:28px}
  .footer .cols{grid-template-columns:1fr 1fr}
  .nav,.header .call{display:none}
  .burger{display:block}
  .nav.open{display:flex;position:absolute;top:72px;left:0;right:0;background:#fff;flex-direction:column;
    padding:14px 22px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);gap:2px}
  .nav.open a{padding:12px 8px}
  .nav.open a.active::after{display:none}
}
@media(max-width:560px){
  .stats,.features,.pgrid,.adv,.apps{grid-template-columns:1fr}
  .footer .cols{grid-template-columns:1fr}
  .hero h1{font-size:28px}
  .nitem{flex-direction:column;align-items:flex-start}
  .nitem .date{border-right:none;text-align:left;padding:0 0 8px;border-bottom:1px solid var(--line);width:100%;flex-basis:auto}
  .nitem .go{margin-left:0}
}