/* ============================================================
   彬杨塑业 2026 改版样式 v1（样板预览版）
   设计基调：工业蓝 + 白色留白 + 卡片化，桌面/移动双端响应式
   ============================================================ */
:root{
  --blue-900:#0b2d52;
  --blue-800:#0d3a6b;
  --blue-700:#0d4a8f;
  --blue-600:#1565c0;
  --blue-100:#e8f1fb;
  --accent:#ff8c1a;
  --accent-dark:#e67600;
  --ink:#1f2d3d;
  --ink-2:#5a6b7f;
  --line:#e3e9f0;
  --bg:#f5f7fa;
  --white:#fff;
  --radius:14px;
  --shadow:0 6px 24px rgba(13,58,107,.10);
  --shadow-hover:0 12px 32px rgba(13,58,107,.18);
}
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--white);line-height:1.75;font-size:16px}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s}
ul{list-style:none}
.container{max-width:1180px;margin:0 auto;padding:0 20px}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--blue-900);color:#cfe0f2;font-size:13px}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:34px}
.topbar a{color:#fff}
.topbar .tel{font-weight:600;letter-spacing:.5px}

/* ---------- 导航 ---------- */
.header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);box-shadow:0 1px 0 var(--line),0 4px 18px rgba(13,58,107,.06)}
.nav{display:flex;align-items:center;justify-content:space-between;height:76px}
.brand{display:flex;align-items:center;gap:12px}
.brand img{height:56px;width:auto}
.brand .name{font-size:15px;color:var(--ink-2);letter-spacing:1px}
.menu{display:flex;gap:6px}
.menu a{display:block;padding:10px 18px;border-radius:8px;font-size:16px;color:var(--ink);font-weight:500;position:relative}
.menu a:hover{color:var(--blue-700);background:var(--blue-100)}
.menu a.active{color:var(--blue-700);font-weight:600}
.menu a.active::after{content:"";position:absolute;left:18px;right:18px;bottom:4px;height:3px;border-radius:2px;background:var(--accent)}
.nav-cta{background:var(--accent);color:#fff !important;padding:10px 20px;border-radius:8px;font-weight:600}
.nav-cta:hover{background:var(--accent-dark);color:#fff}
.burger{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:8px;background:#fff;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px}
.burger span{width:20px;height:2px;background:var(--blue-700);border-radius:2px}

/* ---------- Hero 轮播 ---------- */
.hero{position:relative;overflow:hidden;background:var(--blue-800)}
.hero-slides{position:relative;height:440px}
.hero-slide{position:absolute;inset:0;opacity:0;transition:opacity .8s ease;display:flex;align-items:center}
.hero-slide.on{opacity:1}
.hero-slide img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;object-position:center}
.hero-slide .veil{position:absolute;inset:0;background:linear-gradient(90deg,rgba(8,34,64,.72) 0%,rgba(8,34,64,.42) 55%,rgba(8,34,64,.12) 100%)}
.hero-copy{position:relative;z-index:2;color:#fff;max-width:640px}
.hero-copy .kicker{display:inline-block;font-size:14px;letter-spacing:3px;border:1px solid rgba(255,255,255,.45);padding:4px 14px;border-radius:999px;margin-bottom:18px;background:rgba(255,255,255,.08)}
.hero-copy h2{font-size:40px;line-height:1.3;font-weight:700;text-shadow:0 2px 12px rgba(0,0,0,.3)}
.hero-copy h2 em{font-style:normal;color:#ffd28a}
.hero-copy p{margin-top:14px;font-size:17px;color:#dbe7f5}
.hero-copy .acts{margin-top:26px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 26px;border-radius:9px;font-size:16px;font-weight:600;transition:.2s}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-dark)}
.btn-ghost{border:1.5px solid rgba(255,255,255,.7);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.14)}
.hero-dots{position:absolute;bottom:18px;left:50%;transform:translateX(-50%);display:flex;gap:8px;z-index:3}
.hero-dots i{width:26px;height:4px;border-radius:2px;background:rgba(255,255,255,.4);cursor:pointer;transition:.2s}
.hero-dots i.on{background:#fff}

/* ---------- 通用 section ---------- */
.section{padding:72px 0}
.section.alt{background:var(--bg)}
.sec-head{text-align:center;margin-bottom:44px}
.sec-head h2{font-size:32px;font-weight:700;letter-spacing:1px}
.sec-head h2 span{color:var(--blue-700)}
.sec-head .en{margin-top:6px;font-size:13px;letter-spacing:4px;color:#9aa8b8;text-transform:uppercase}
.sec-head .bar{width:56px;height:4px;border-radius:2px;background:var(--accent);margin:16px auto 0}

/* ---------- 优势 ---------- */
.feats{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.feat{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:30px 24px;text-align:center;transition:.25s}
.feat:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:transparent}
.feat .ico{width:64px;height:64px;margin:0 auto 16px;border-radius:18px;background:var(--blue-100);display:flex;align-items:center;justify-content:center}
.feat .ico svg{width:32px;height:32px;stroke:var(--blue-700);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.feat h3{font-size:18px;margin-bottom:8px}
.feat p{font-size:14px;color:var(--ink-2)}

/* ---------- 产品卡片 ---------- */
.prods{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.prod{background:var(--white);border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);transition:.25s}
.prod:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.prod .pic{aspect-ratio:4/3;overflow:hidden;background:#fff}
.prod .pic img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.prod:hover .pic img{transform:scale(1.06)}
.prod .info{padding:18px 20px 22px}
.prod h3{font-size:18px;margin-bottom:6px;color:var(--ink)}
.prod:hover h3{color:var(--blue-700)}
.prod p{font-size:13.5px;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.prod .more{display:inline-block;margin-top:10px;font-size:13px;color:var(--blue-600);font-weight:500}

/* ---------- 关于 ---------- */
.about-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:44px;align-items:center}
.about-grid .pic{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.about-grid h3{font-size:26px;margin-bottom:16px}
.about-grid h3 span{color:var(--blue-700)}
.about-grid p{color:var(--ink-2);margin-bottom:12px;text-align:justify}
.about-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:20px}
.about-points div{background:var(--blue-100);border-radius:10px;padding:14px 10px;text-align:center;font-size:14px;color:var(--blue-800);font-weight:600}

/* ---------- FAQ（静态卡片，2×3 网格，全部展示） ---------- */
.faq-list{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:18px 22px;align-items:stretch}
.faq-item{background:var(--white);border:1px solid var(--line);border-radius:12px;padding:20px 24px 22px;transition:.25s}
.faq-item:hover{border-color:var(--blue-600);box-shadow:var(--shadow);transform:translateY(-3px)}
.faq-item h3{font-size:16.5px;font-weight:600;display:flex;align-items:center;gap:12px;color:var(--ink)}
.faq-item h3::before{content:"Q";flex:none;width:28px;height:28px;border-radius:8px;background:var(--blue-700);color:#fff;font-size:14px;display:flex;align-items:center;justify-content:center}
.faq-item p{margin-top:10px;padding-left:40px;color:var(--ink-2);font-size:14.5px;line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* ---------- 新闻 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.news-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:24px 22px;transition:.25s;display:flex;flex-direction:column}
.news-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.news-card time{font-size:12.5px;color:#9aa8b8}
.news-card h3{font-size:16.5px;margin:10px 0 10px;line-height:1.5;color:var(--ink)}
.news-card:hover h3{color:var(--blue-700)}
.news-card p{font-size:13.5px;color:var(--ink-2);flex:1;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}

/* ---------- CTA 横条（卡片式，左右留白，与页脚保持距离） ---------- */
.cta-band{background:linear-gradient(100deg,var(--blue-800),var(--blue-600));color:#fff;padding:38px 52px;border-radius:16px;max-width:1180px;margin:0 auto 64px;box-shadow:var(--shadow)}
.cta-band .container{max-width:none;padding:0;margin:0;display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.cta-band h2{font-size:24px}
.cta-band p{color:#cfe0f2;margin-top:4px;font-size:15px}
.cta-band .btn{background:var(--accent)}
.cta-band .btn:hover{background:var(--accent-dark)}

/* ---------- 面包屑 ---------- */
.crumbs{background:var(--bg);border-bottom:1px solid var(--line);font-size:14px;color:var(--ink-2)}
.crumbs .container{padding:12px 20px}
.crumbs a{color:var(--blue-600)}
.crumbs a:hover{text-decoration:underline}

/* ---------- 详情页 ---------- */
.detail-wrap{display:grid;grid-template-columns:250px 1fr;gap:30px;align-items:start;padding:36px 0 64px}
.side{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;position:sticky;top:96px}
.side .side-h{background:var(--blue-700);color:#fff;padding:13px 20px;font-size:16px;font-weight:600}
.side .side-h a{color:#fff;display:flex;justify-content:space-between;align-items:center}
.side ul{padding:8px 0}
.side li a{display:block;padding:11px 20px;font-size:15px;border-left:3px solid transparent}
.side li a:hover,.side li a.on{background:var(--blue-100);border-left-color:var(--accent);color:var(--blue-700);font-weight:600}
.side-contact{border-top:1px solid var(--line);padding:18px 20px;background:var(--bg);font-size:14px;color:var(--ink-2)}
.side-contact strong{display:block;color:var(--blue-800);font-size:17px;margin-top:4px}
.detail h1{font-size:27px;line-height:1.45;margin-bottom:10px}
.detail .meta{font-size:13.5px;color:#9aa8b8;padding-bottom:18px;border-bottom:1px dashed var(--line);margin-bottom:22px}
.detail .lead{background:var(--blue-100);border-left:4px solid var(--blue-700);border-radius:0 10px 10px 0;padding:16px 20px;color:var(--blue-800);margin-bottom:24px;font-size:15.5px}
.detail .body p{margin-bottom:14px;text-align:justify;color:#33455c}
.detail .body h2{font-size:20px;margin:26px 0 12px;color:var(--blue-800)}
.detail .body img{border-radius:10px;margin:8px auto}
.product-hero{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin-bottom:28px}
.product-hero .pic{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}
.product-hero .pic img{width:100%;height:100%;object-fit:cover}
.product-hero h2{font-size:22px;color:var(--blue-800)}
.product-hero .desc{color:var(--ink-2);margin-top:12px;font-size:15px}
.contact-chip{margin-top:20px;background:linear-gradient(100deg,var(--blue-800),var(--blue-600));border-radius:12px;color:#fff;padding:18px 22px;display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}
.contact-chip .t{font-size:15px}
.contact-chip .n{font-size:21px;font-weight:700;letter-spacing:.5px}
.pager{display:flex;justify-content:space-between;gap:14px;margin:26px 0 34px;font-size:14px;color:var(--ink-2)}
.pager a{color:var(--blue-600)}
.rel-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}

/* ---------- 页脚 ---------- */
.footer{background:var(--blue-900);color:#b9c9dc;font-size:14px;margin-top:0}
.footer .kw{padding:18px 0;border-bottom:1px solid rgba(255,255,255,.08);font-size:12.5px;color:#7f93ab;line-height:1.9}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:30px;padding:44px 0}
.footer h3{color:#fff;font-size:16px;margin-bottom:16px;font-weight:600}
.footer li{margin-bottom:9px}
.footer a:hover{color:#fff}
.footer .contact li{display:flex;gap:8px}
.footer .copy{border-top:1px solid rgba(255,255,255,.08);padding:16px 0;text-align:center;font-size:13px;color:#7f93ab}
.footer .copy a{color:#9fb3c8}

/* ---------- 移动端 ---------- */
.mob-telbar{display:none}
@media (max-width:900px){
  .topbar{display:none}
  .nav{height:62px}
  .brand img{height:42px}
  .brand .name{display:none}
  .burger{display:flex}
  .menu{position:fixed;top:62px;left:0;right:0;background:#fff;flex-direction:column;padding:10px 16px 18px;gap:2px;box-shadow:0 18px 30px rgba(13,58,107,.15);display:none}
  .menu.open{display:flex}
  .menu a{padding:13px 10px;border-bottom:1px solid var(--line)}
  .nav-cta{display:none}
  .hero-slides{height:300px}
  .hero-copy h2{font-size:25px}
  .hero-copy p{font-size:14.5px}
  .hero-copy .acts .btn{padding:10px 18px;font-size:14px}
  .section{padding:52px 0}
  .sec-head h2{font-size:24px}
  .feats,.prods,.news-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .about-grid{grid-template-columns:1fr;gap:24px}
  .about-points{grid-template-columns:repeat(3,1fr)}
  .faq-list{grid-template-columns:1fr;gap:12px}
  .cta-band{margin:0 16px 44px;padding:28px 22px}
  .cta-band h2{font-size:19px}
  .detail-wrap{grid-template-columns:1fr}
  .side{position:static}
  .product-hero{grid-template-columns:1fr}
  .rel-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px;padding:34px 0}
  .mob-telbar{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:99}
  .mob-telbar a{flex:1;text-align:center;padding:13px 0;font-size:15px;font-weight:600;color:#fff}
  .mob-telbar a.call{background:var(--accent)}
  .mob-telbar a.msg{background:var(--blue-700)}
  body{padding-bottom:48px}
}
@media (max-width:520px){
  .feats,.prods,.news-grid,.rel-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .about-points{grid-template-columns:1fr 1fr}
}

/* ============================================================
   内页补充样式（列表 / 详情 / 单页 / 联系）
   ============================================================ */

/* 内页顶部标题条 */
.page-hero{background:linear-gradient(100deg,var(--blue-800),var(--blue-600));color:#fff;padding:46px 0 42px}
.page-hero h1{font-size:30px;font-weight:700;letter-spacing:1px}
.page-hero p{color:#cfe0f2;margin-top:10px;font-size:15px;max-width:760px}
.page-hero .en{margin-top:6px;font-size:12px;letter-spacing:4px;color:rgba(255,255,255,.55);text-transform:uppercase}

/* 列表网格 */
.list-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.list-grid .prod .pic{aspect-ratio:4/3}
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-bottom:44px}
.cat-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s}
.cat-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.cat-card .pic{aspect-ratio:16/10;overflow:hidden}
.cat-card .pic img{width:100%;height:100%;object-fit:cover}
.cat-card .info{padding:16px 18px 18px}
.cat-card h3{font-size:17px;margin-bottom:5px}
.cat-card p{font-size:13px;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* 子分类筛选条 */
.filter-bar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:28px}
.filter-bar a{padding:8px 18px;border:1px solid var(--line);border-radius:999px;font-size:14.5px;color:var(--ink-2);background:#fff}
.filter-bar a:hover{border-color:var(--blue-600);color:var(--blue-700)}
.filter-bar a.on{background:var(--blue-700);border-color:var(--blue-700);color:#fff}

/* 新闻列表 */
.news-list{display:grid;gap:16px}
.news-row{display:grid;grid-template-columns:92px 1fr;gap:22px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px 26px;transition:.22s}
.news-row:hover{border-color:var(--blue-600);box-shadow:var(--shadow);transform:translateY(-2px)}
.news-row .date{background:var(--blue-100);border-radius:10px;text-align:center;padding:12px 6px;color:var(--blue-800)}
.news-row .date b{display:block;font-size:22px;line-height:1.1}
.news-row .date span{font-size:12px;color:var(--ink-2)}
.news-row h3{font-size:17.5px;margin-bottom:8px}
.news-row:hover h3{color:var(--blue-700)}
.news-row p{font-size:14px;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* 单页正文 */
.single{padding:42px 0 64px}
.single-inner{max-width:1000px;margin:0 auto}
.single h1{font-size:28px;margin-bottom:8px}
.single .meta{font-size:13.5px;color:#9aa8b8;padding-bottom:18px;border-bottom:1px dashed var(--line);margin-bottom:26px}
.single .body p{margin-bottom:15px;text-align:justify;color:#33455c;font-size:16px;line-height:1.95}
.single .body h2{font-size:21px;margin:30px 0 12px;color:var(--blue-800);padding-left:14px;border-left:4px solid var(--accent)}
.single .body ul{margin:0 0 16px 0}
.single .body li{position:relative;padding-left:18px;margin-bottom:8px;color:#33455c}
.single .body li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;background:var(--blue-600)}
.single .figure{border-radius:var(--radius);overflow:hidden;margin:0 0 26px;box-shadow:var(--shadow)}

/* 参数表 */
.spec-table{width:100%;border-collapse:collapse;font-size:14.5px;margin:4px 0 26px;background:#fff}
.spec-table th,.spec-table td{border:1px solid var(--line);padding:11px 15px;text-align:left}
.spec-table th{background:var(--blue-100);color:var(--blue-800);font-weight:600;width:132px}
.spec-table tr:nth-child(even) td{background:#fafcfe}

/* 联系卡片 */
.contact-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:34px}
.ccard{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px 20px;text-align:center}
.ccard .k{font-size:13px;color:#9aa8b8}
.ccard .v{font-size:16.5px;font-weight:600;color:var(--blue-800);margin-top:6px;word-break:break-all}

/* 生产流程 */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin-bottom:36px}
.step{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px 16px;text-align:center}
.step b{display:flex;width:34px;height:34px;margin:0 auto 10px;border-radius:50%;background:var(--blue-700);color:#fff;align-items:center;justify-content:center;font-size:15px}
.step h3{font-size:15.5px;margin-bottom:6px}
.step p{font-size:13px;color:var(--ink-2)}

/* 图集 */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:34px}
.gallery img{width:100%;height:230px;object-fit:cover;border-radius:12px}

/* 地图/到厂 */
.map-box{background:var(--blue-100);border:1px solid #d5e3f4;border-radius:var(--radius);padding:26px 28px;display:flex;justify-content:space-between;gap:20px;align-items:center;flex-wrap:wrap}
.map-box h3{font-size:18px;color:var(--blue-800);margin-bottom:6px}
.map-box p{font-size:14.5px;color:var(--ink-2)}

@media (max-width:900px){
  .page-hero{padding:32px 0 30px}
  .page-hero h1{font-size:23px}
  .list-grid,.cat-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .contact-cards{grid-template-columns:repeat(2,1fr);gap:12px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .gallery{grid-template-columns:1fr 1fr}
  .gallery img{height:150px}
  .news-row{grid-template-columns:1fr;gap:12px;padding:18px}
  .news-row .date{display:flex;gap:8px;align-items:baseline;padding:6px 12px;justify-content:flex-start;width:max-content}
  .news-row .date b{font-size:15px}
  .single{padding:26px 0 44px}
  .single h1{font-size:22px}
  .single .body p{font-size:15.5px}
  .spec-table th{width:96px;font-size:13.5px}
  .spec-table td{font-size:13.5px;padding:9px 10px}
}
@media (max-width:520px){
  .list-grid,.cat-grid{grid-template-columns:1fr}
}

/* ---------- 10-17 二次优化：文字版 LOGO / 产品详情布局 ---------- */
/* 文字版公司名 LOGO */
.brand-text{display:flex;flex-direction:column;line-height:1.3}
.brand-text b{font-size:22px;color:var(--blue-800);letter-spacing:1px;font-weight:700;white-space:nowrap}
.brand-text span{font-size:10.5px;color:#9aa8b8;letter-spacing:3.5px;margin-top:2px}

/* 产品详情 hero：图片定尺寸 4:3，右侧信息垂直居中，消除大片空白 */
.product-hero{grid-template-columns:5fr 6fr;gap:36px;align-items:center}
.product-hero .pic{aspect-ratio:4/3}
.product-hero .pic img{width:100%;height:100%;object-fit:cover}
.hero-tags{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0 20px}
.hero-tags span{background:var(--blue-100);color:var(--blue-800);font-size:13px;padding:6px 13px;border-radius:999px}

/* 侧栏热门产品 */
.side-reco{border-top:1px solid var(--line);padding:14px 20px 16px;background:#fff}
.side-reco .t{font-size:14px;font-weight:600;color:var(--blue-800);margin-bottom:6px}
.side-reco a{display:block;font-size:13.5px;color:var(--ink-2);padding:7px 0;border-bottom:1px dashed var(--line)}
.side-reco a:last-child{border-bottom:0}
.side-reco a:hover{color:var(--blue-700)}

@media (max-width:900px){
  .brand-text b{font-size:16.5px;letter-spacing:.5px}
  .brand-text span{font-size:9px;letter-spacing:2px}
  .product-hero{grid-template-columns:1fr;gap:18px}
  .product-hero .pic{max-width:520px;margin:0 auto}
}

/* ---------- 10-17 三次优化：侧栏 FAQ + 最新资讯 ---------- */
.side-faq,.side-news{border-top:1px solid var(--line);padding:14px 20px 16px;background:#fff}
.side-faq .t,.side-news .t{font-size:14px;font-weight:600;color:var(--blue-800);margin-bottom:8px}
.side-faq details{border-bottom:1px dashed var(--line);padding:8px 0}
.side-faq details:last-of-type{border-bottom:0}
.side-faq summary{font-size:13.5px;color:var(--ink);cursor:pointer;list-style:none;position:relative;padding-right:18px;line-height:1.5}
.side-faq summary::-webkit-details-marker{display:none}
.side-faq summary::after{content:"+";position:absolute;right:2px;top:0;color:var(--blue-600);font-weight:700}
.side-faq details[open] summary::after{content:"–"}
.side-faq details p{font-size:12.8px;color:var(--ink-2);margin:6px 0 2px;line-height:1.65}
.side-faq .more,.side-news .more{display:block;font-size:12.5px;color:var(--blue-700);margin-top:10px}
.side-news a:not(.more){display:block;font-size:13.5px;color:var(--ink-2);padding:7px 0;border-bottom:1px dashed var(--line);line-height:1.5;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.side-news a:not(.more):hover{color:var(--blue-700)}

/* ---------- 404 页面 ---------- */
.e404{background:linear-gradient(180deg,#f2f7fd,#ffffff);padding:64px 0 56px;border-bottom:1px solid var(--line)}
.e404-inner{max-width:820px;margin:0 auto;text-align:center}
.e404-num{font-size:132px;font-weight:800;line-height:1;letter-spacing:6px;color:var(--blue-800);opacity:.12;user-select:none}
.e404-num span{display:inline-block;position:relative;top:-6px;color:var(--accent)}
.e404 h1{font-size:30px;margin:-28px 0 14px;color:var(--blue-800)}
.e404-sub{color:var(--ink-2);font-size:15.5px;line-height:1.9;max-width:620px;margin:0 auto 26px}
.e404-acts{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.e404-acts .btn{padding:12px 26px}
.btn-line{background:#fff;border:1px solid var(--line);color:var(--blue-800)}
.btn-line:hover{border-color:var(--blue-600);color:var(--blue-700);background:#f7fbff}
.e404-tips{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:34px;text-align:left}
.e404-tips>div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 20px;display:flex;flex-wrap:wrap;gap:8px 16px;align-items:center}
.e404-tips b{width:100%;font-size:14px;color:var(--blue-800);margin-bottom:2px}
.e404-tips a{font-size:13.5px;color:var(--ink-2)}
.e404-tips a:hover{color:var(--blue-700)}
@media (max-width:900px){
  .e404{padding:40px 0 34px}
  .e404-num{font-size:86px;letter-spacing:3px}
  .e404 h1{font-size:22px;margin-top:-16px}
  .e404-sub{font-size:14.5px}
  .e404-tips{grid-template-columns:1fr}
}