/* ============================================================
   ERQI New Materials — UI 新版视觉（Deep Blue & Steel）
   由 generate_site.py 读取本文件并输出为 erqiwire_site/css/style.css
   修改本文件后重新运行 python generate_site.py 即全站生效
   ============================================================ */
:root{
  --blue:#1e5ad7;            /* 主品牌蓝（链接/主按钮/强调） */
  --blue-d:#0d3c94;          /* 深蓝（标题/渐变端） */
  --blue-2:#2f7bf5;          /* 亮蓝（渐变高光） */
  --navy:#0a1c38;            /* 页脚深底 */
  --ink:#1a2742;             /* 正文墨色 */
  --muted:#5c6a84;           /* 次要文字 */
  --line:#e2e8f2;            /* 分隔线与描边 */
  --bg:#f4f7fc;              /* 浅区底（整页底色） */
  --alt:#edf2fb;             /* 次级浅蓝底 */
  --card:#ffffff;            /* 卡片面 */
  --shadow-sm:0 1px 2px rgba(16,38,84,.04),0 2px 10px -2px rgba(16,38,84,.05);
  --shadow-md:0 10px 26px -12px rgba(16,42,98,.20);
  --shadow-lg:0 22px 46px -18px rgba(13,40,110,.28);
  --ring:rgba(30,90,215,.28);
  --radius:12px;
}
*{box-sizing:border-box;margin:0;padding:0}
::selection{background:var(--blue);color:#fff}
html{scroll-behavior:smooth}
body{font-family:-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%}
:focus-visible{outline:2px solid var(--blue);outline-offset:2px}
.wrap{max-width:1180px;margin:0 auto;padding:0 22px}

/* ---------- 按钮 ---------- */
.btn{display:inline-block;background:linear-gradient(180deg,var(--blue-2),var(--blue));color:#fff;padding:12px 26px;border-radius:9px;font-weight:600;letter-spacing:.01em;box-shadow:var(--shadow-sm);transition:transform .18s ease,box-shadow .18s ease,filter .18s ease}
.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);filter:brightness(1.05)}
.btn:active{transform:translateY(0)}
.btn-ghost{background:rgba(255,255,255,.12);border:1.5px solid rgba(255,255,255,.9);color:#fff;margin-left:12px;box-shadow:none}
.btn-ghost:hover{background:#fff;color:var(--blue-d)}
.btn-ghost--blue{background:transparent;border:1.5px solid var(--blue);color:var(--blue)}
.btn-ghost--blue:hover{background:var(--blue);color:#fff}

/* ---------- 顶栏 + 导航 ---------- */
.topbar{background:var(--navy);color:#c7d3e6;font-size:12.5px;letter-spacing:.02em}
.topbar__in{max-width:1180px;margin:0 auto;padding:7px 22px;display:flex;gap:26px}
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.92);backdrop-filter:saturate(160%) blur(8px);border-bottom:1px solid var(--line);box-shadow:0 1px 0 rgba(15,40,90,.02)}
.header__in{max-width:1180px;margin:0 auto;padding:10px 22px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.logo{display:flex;align-items:baseline;gap:8px;font-size:23px;font-weight:800;color:var(--blue);letter-spacing:-.01em;white-space:nowrap}
.logo b{font-weight:800}
.logo span{font-size:12px;color:var(--muted);font-weight:500;letter-spacing:.03em}
.nav{display:flex;gap:2px;list-style:none;flex-wrap:wrap}
.nav a{display:block;padding:9px 6px;margin:0 6px;font-weight:600;font-size:15px;color:#33415e;position:relative;transition:color .18s ease}
.nav a::after{content:"";position:absolute;left:6px;right:6px;bottom:2px;height:2.5px;border-radius:3px;background:linear-gradient(90deg,var(--blue),var(--blue-2));transform:scaleX(0);transform-origin:left;transition:transform .22s ease}
.nav a:hover{color:var(--blue)}
.nav a:hover::after,.nav .is-active a::after{transform:scaleX(1)}
.nav .is-active a{color:var(--blue)}

/* ---------- 首页横幅 ---------- */
.banner{background:radial-gradient(1200px 520px at 8% -12%,rgba(255,255,255,.18),transparent 55%),linear-gradient(118deg,var(--blue-2) 0%,var(--blue) 45%,var(--blue-d) 100%);color:#fff;padding:84px 0 96px;position:relative;overflow:hidden}
.banner::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.55),transparent)}
.banner h1{font-size:40px;line-height:1.22;margin-bottom:16px;max-width:780px;font-weight:800;letter-spacing:-.01em}
.banner p{max-width:660px;opacity:.95;margin-bottom:28px;font-size:16.5px;color:rgba(255,255,255,.94)}
.banner .btn{margin-top:2px}
.banner--img{background-size:cover;background-position:center;min-height:600px;display:flex;align-items:center;padding:0}
.banner--img::after{display:none}
.banner--img .banner__in{width:100%}
.banner--img h1{text-shadow:0 3px 22px rgba(6,20,55,.55)}
.banner--img p{text-shadow:0 2px 14px rgba(6,20,55,.5)}
@media(max-width:1100px){.banner--img{min-height:460px}}

/* ---------- 区块与标题 ---------- */
.section{padding:66px 0}
.section--alt{background:var(--alt)}
.sec-title{text-align:center;margin-bottom:40px}
.sec-title h2{font-size:30px;color:var(--blue-d);font-weight:800;letter-spacing:-.01em}
.sec-title h2::after{content:"";display:block;width:54px;height:3.5px;margin:14px auto 0;border-radius:4px;background:linear-gradient(90deg,var(--blue),#79abff)}
.sec-title p{color:var(--muted);margin-top:12px;font-size:15.5px}

/* ---------- 卡片通用 ---------- */
.cat-grid,.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.prod-grid.sm{grid-template-columns:repeat(4,1fr)}
.cat-card,.prod-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}
.cat-card:hover,.prod-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:rgba(30,90,215,.28)}
.cat-card__img,.prod-card__img{background:linear-gradient(180deg,#f2f6fc,#e6edf7);display:block;overflow:hidden;aspect-ratio:4/3}
.cat-card__img img,.cat-card__img svg,.prod-card__img img,.prod-card__img svg,.gal-card__img img,.gal-card__img svg{width:100%;height:100%;object-fit:cover;display:block;transition:transform .5s ease}
.cat-card:hover img,.prod-card:hover img,.gal-card:hover img{transform:scale(1.06)}
.cat-card h3{padding:18px 18px 4px;font-size:18px;color:var(--blue-d);font-weight:700}
.cat-card p{padding:2px 18px 20px;color:var(--muted);font-size:14px;line-height:1.55}
.prod-card h3{padding:15px 16px 3px;font-size:16px;font-weight:700;color:#233253}
.prod-card p{padding:4px 16px 18px;color:var(--muted);font-size:13px;line-height:1.5}

/* ---------- 目录行（首页悬停/分类页右侧） ---------- */
.prod-row{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px;display:flex;gap:16px;align-items:center;text-decoration:none;color:inherit;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;box-shadow:var(--shadow-sm)}
.prod-row:hover{border-color:rgba(30,90,215,.30);box-shadow:var(--shadow-md);transform:translateY(-2px)}
.prod-row__img{width:164px;height:120px;flex-shrink:0;border-radius:9px;overflow:hidden;background:linear-gradient(180deg,#f2f6fc,#e6edf7)}
.prod-row__img img,.prod-row__img svg{width:100%;height:100%;object-fit:cover;display:block}
.prod-row__body{flex:1;min-width:0}
.prod-row__body h3{margin:0 0 5px;font-size:16px;color:#233253;font-weight:700}
.prod-row__body .meta{font-size:12px;color:var(--muted);margin-bottom:6px;letter-spacing:.02em}
.prod-row__body .desc{font-size:13px;color:#4d5c76;margin:0 0 7px;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.prod-row__body .more{font-size:12.5px;color:var(--blue);font-weight:700;display:inline-flex;align-items:center;gap:3px}
.prod-row:hover .more{text-decoration:underline}
.empty-tip{padding:44px 16px;text-align:center;color:var(--muted);background:var(--card);border:1.5px dashed #ccd6e6;border-radius:var(--radius);grid-column:1/-1}

/* ---------- 分类页左菜单 ---------- */
.catalog-layout{display:grid;grid-template-columns:248px 1fr;gap:30px;align-items:start}
.catalog-side{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:10px;position:sticky;top:84px;max-height:calc(100vh - 104px);overflow-y:auto;box-shadow:var(--shadow-sm)}
.catalog-side h4{font-size:11.5px;color:var(--muted);padding:12px 14px 8px;letter-spacing:.08em;text-transform:uppercase;margin:0;font-weight:700}
.catalog-side a{display:flex;justify-content:space-between;align-items:center;padding:11px 13px;color:#233a60;border-radius:9px;font-size:14.5px;text-decoration:none;line-height:1.3;transition:background .16s ease,color .16s ease}
.catalog-side a:hover{background:#f2f6fd}
.catalog-side a.active{background:linear-gradient(180deg,#e8f0fe,#dfe9fc);color:var(--blue);font-weight:700}
.catalog-side .count{font-size:11.5px;color:var(--muted);background:#eef2f9;border-radius:12px;padding:1px 9px;flex-shrink:0;margin-left:8px;font-weight:600}
.catalog-side a.active .count{background:#cfe0fb;color:var(--blue)}
.catalog-main{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}

/* News / Gallery 目录版：右侧内容区 */
.cat-pane{min-width:0}
.cat-pane .sec-title{text-align:left;margin:0 0 26px}
.cat-pane .sec-title h2::after{margin:12px 0 0}
.cat-pane .gal-grid{grid-template-columns:repeat(3,1fr);gap:20px;margin:0}
.cat-pane .gal-grid + .sec-title{margin-top:46px}
.cat-pane .news-list{max-width:none;margin:0}

/* ---------- 应用/图库/新闻 ---------- */
.chips{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-bottom:30px}
.chip{background:var(--card);border:1px solid var(--line);padding:7px 18px;border-radius:22px;font-size:14px;color:#3a4760;transition:all .18s ease;cursor:pointer}
.chip:hover{border-color:var(--blue);color:var(--blue);box-shadow:var(--shadow-sm)}
.app-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.app-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 20px;text-align:center;font-weight:700;color:var(--blue-d);display:block;text-decoration:none;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.app-card:hover{color:var(--blue);transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(30,90,215,.30)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.detail__pic img,.detail__pic svg,.gal-detail__img img,.gal-detail__img svg,.split>div:first-child img{width:100%;height:auto;display:block}
.split h2{color:var(--blue-d);margin-bottom:14px;font-weight:800;letter-spacing:-.01em}
.check{list-style:none;margin-top:12px}
.check li{padding-left:26px;position:relative;margin:9px 0;color:#33415e}
.check li:before{content:"✓";color:#fff;background:var(--blue);width:17px;height:17px;font-size:11px;line-height:17px;text-align:center;border-radius:50%;position:absolute;left:0;top:4px;font-weight:700}
.gal-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:44px}
.gal-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:block;text-decoration:none;color:inherit;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;cursor:pointer}
.gal-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(30,90,215,.30)}
.gal-card__img{background:linear-gradient(180deg,#f2f6fc,#e6edf7);overflow:hidden;aspect-ratio:4/3}
.gal-card h4{padding:13px 16px 2px;color:var(--blue-d);font-weight:700;font-size:15.5px}
.gal-card p{padding:3px 16px 16px;color:var(--muted);font-size:13px;line-height:1.5}
.news-list{list-style:none;max-width:840px;margin:0 auto;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:6px 22px;box-shadow:var(--shadow-sm)}
.news-list li{border-bottom:1px solid var(--line);padding:17px 0;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.news-list li:last-child{border-bottom:none}
.news-list a{flex:1;font-size:16.5px;font-weight:600;color:#233253}
.news-list a:hover{color:var(--blue)}
.news-cat{background:var(--blue);color:#fff;font-size:11.5px;padding:3px 11px;border-radius:14px;text-transform:uppercase;letter-spacing:.05em;font-weight:700}
.news-list time{color:var(--muted);font-size:13px}

/* ---------- 详情页 ---------- */
.crumb{color:var(--muted);font-size:13.5px;margin-bottom:18px}
.crumb a:hover{color:var(--blue)}
.crumb .sep{margin:0 6px;opacity:.6}
.detail{display:grid;grid-template-columns:1fr 1fr;gap:44px;margin-top:22px}
.detail__pic{border-radius:var(--radius);overflow:hidden;background:linear-gradient(180deg,#f2f6fc,#e6edf7);box-shadow:var(--shadow-md);border:1px solid var(--line)}
.detail__info h1{color:var(--blue-d);font-size:30px;margin-bottom:18px;font-weight:800;letter-spacing:-.01em}
.spec{width:100%;border-collapse:separate;border-spacing:0;margin:16px 0 22px;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.spec th,.spec td{border-top:1px solid var(--line);border-left:1px solid var(--line);padding:11px 14px;text-align:left;font-size:14.5px}
.spec tr:first-child th,.spec tr:first-child td{border-top:none}
.spec th:first-child,.spec td:first-child{border-left:none}
.spec th{background:linear-gradient(180deg,#f4f8fe,#e9f0fb);width:150px;color:var(--blue-d);font-weight:700}
.spec tr:nth-child(even) td{background:#fafcff}
.spec td{color:#33415e}
.rel{margin-top:44px}
.rel h2{color:var(--blue-d);font-size:22px;font-weight:800;margin-bottom:18px}
.rich-content{margin-top:46px;border-top:1px solid var(--line);padding-top:28px}
.rich-content h2,.rich-content h3,.rich-content h4{color:var(--blue-d);margin:26px 0 10px}
.rich-content h2{font-size:23px;font-weight:800}
.rich-content h3{font-size:19px;font-weight:700}
.rich-content p{margin:13px 0;color:#3c4a63}
.rich-content img{max-width:100%;height:auto;border-radius:10px;display:block;margin:18px auto;box-shadow:var(--shadow-sm)}
.rich-content ul,.rich-content ol{margin:13px 0 13px 26px}
.rich-content li{margin:7px 0}
.rich-content a{color:var(--blue);text-decoration:underline;text-underline-offset:2px}
.rich-content blockquote{border-left:3px solid var(--blue);background:var(--alt);padding:12px 18px;color:var(--muted);margin:16px 0;border-radius:0 8px 8px 0}

/* ---------- Gallery 详情 ---------- */
.gal-detail{display:grid;grid-template-columns:1.4fr 1fr;gap:34px;align-items:start}
.gal-detail__img{border-radius:var(--radius);overflow:hidden;background:linear-gradient(180deg,#f2f6fc,#e6edf7);box-shadow:var(--shadow-md);border:1px solid var(--line)}
.gal-detail__info h2{color:var(--blue-d);margin:14px 0 12px;font-size:27px;font-weight:800}
.gal-detail__info p{color:#3c4a63;line-height:1.75;margin:0 0 24px;font-size:15.5px}
.tag{display:inline-block;background:linear-gradient(180deg,#e8f0fe,#dbe7fc);color:var(--blue);font-size:12px;font-weight:700;padding:5px 14px;border-radius:22px;letter-spacing:.05em}

/* ---------- 内页横幅 ---------- */
.page-banner{background:radial-gradient(1000px 420px at 20% -30%,rgba(255,255,255,.16),transparent 55%),linear-gradient(118deg,var(--blue-2),var(--blue) 50%,var(--blue-d));color:#fff;padding:62px 0;text-align:center;position:relative;overflow:hidden}
.page-banner::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.5),transparent)}
.page-banner h1{font-size:33px;margin:0 0 10px;font-weight:800;letter-spacing:-.01em}
.page-banner p{color:rgba(255,255,255,.92);max-width:820px;margin:0 auto;font-size:15.5px}

/* ---------- 联系/表单 ---------- */
.form-card{background:var(--card);border:1px solid var(--line);padding:28px;border-radius:14px;box-shadow:var(--shadow-sm)}
.form-card input,.form-card textarea{width:100%;padding:12px 13px;margin-bottom:13px;border:1px solid #d8e0ee;border-radius:8px;font-family:inherit;font-size:14px;background:#fbfcff;transition:border-color .16s ease,box-shadow .16s ease}
.form-card input:focus,.form-card textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px var(--ring)}
.form-card .note{font-size:12px;color:var(--muted);margin-top:8px}
.ci h2{color:var(--blue-d);margin-bottom:16px;font-size:24px;font-weight:800}
.ci p{margin:9px 0;color:#33415e}
.ci a{color:var(--blue)}
.ci a:hover{text-decoration:underline}
.socials{margin-top:24px;display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.socials__cap{font-size:11.5px;color:var(--muted);letter-spacing:.08em;text-transform:uppercase;font-weight:700}
.soc{display:inline-block;padding:8px 15px;border-radius:22px;font-size:13px;font-weight:600;color:#fff;background:var(--sc);text-decoration:none;transition:opacity .18s ease,transform .18s ease;box-shadow:var(--shadow-sm)}
.soc:hover{opacity:.88;transform:translateY(-2px);text-decoration:none}

/* ---------- 文章/新闻详情 ---------- */
.article{max-width:800px}
.article h1{color:var(--blue-d);margin:10px 0;font-size:32px;font-weight:800;letter-spacing:-.01em}
.article time{color:var(--muted);font-size:13px;display:block;margin-bottom:18px}
.news-cover{margin:20px 0}
.news-cover img{width:100%;border-radius:12px;display:block;box-shadow:var(--shadow-sm)}

/* ---------- 页脚 ---------- */
.site-footer{background:linear-gradient(180deg,var(--navy),#071227);color:#b9c8dd;padding:56px 0 0;margin-top:50px;position:relative}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--blue),var(--blue-2))}
.footer__in{display:grid;grid-template-columns:2fr 1fr 1fr;gap:34px}
.site-footer h4{color:#fff;margin-bottom:16px;font-size:13px;letter-spacing:.09em;text-transform:uppercase;font-weight:700}
.site-footer a{color:#93a7c2}
.site-footer a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.site-footer p{font-size:14px;margin:5px 0;color:#8ba0bd}
.site-footer .logo{color:#fff;margin-bottom:10px}
.site-footer .logo span{color:#7f93b2}
.copyright{text-align:center;padding:20px;border-top:1px solid rgba(255,255,255,.08);margin-top:42px;font-size:13px;color:#6d829f}

/* ---------- 404 ---------- */
.notfound{text-align:center;padding:84px 0}
.notfound__code{font-size:96px;font-weight:800;line-height:1;margin-bottom:10px;background:linear-gradient(120deg,var(--blue-2),var(--blue-d));-webkit-background-clip:text;background-clip:text;color:transparent}
.notfound__txt{color:var(--muted);font-size:17px;margin:0 0 30px}
.notfound__btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ---------- 图库详情页 ---------- */
.tag + .crumb{margin-top:6px}

/* ---------- 响应式 ---------- */
@media(max-width:960px){
  .cat-grid,.prod-grid,.app-grid{grid-template-columns:repeat(2,1fr)}
  .gal-grid{grid-template-columns:repeat(2,1fr)}
  .cat-pane .gal-grid{grid-template-columns:repeat(2,1fr)}
  .detail,.split,.gal-detail{grid-template-columns:1fr}
  .footer__in{grid-template-columns:1fr}
  .catalog-layout{grid-template-columns:1fr}
  .catalog-side{position:static;max-height:none}
  .catalog-main{grid-template-columns:1fr}
  .header__in{flex-wrap:wrap;justify-content:center}
  .nav{justify-content:center}
  .banner{padding:66px 0 76px}
  .banner h1{font-size:32px}
  .section{padding:52px 0}
}
@media(max-width:560px){
  .cat-grid,.prod-grid,.app-grid,.gal-grid{grid-template-columns:1fr}
  .cat-pane .gal-grid{grid-template-columns:1fr}
  .banner h1{font-size:27px}
  .banner--img{min-height:400px}
  .prod-row{flex-direction:column;align-items:stretch}
  .prod-row__img{width:100%;height:170px}
  .sec-title h2{font-size:25px}
  .btn{padding:11px 20px}
}