/* ===== 基础变量 ===== */
html{scroll-behavior:smooth;scroll-padding-top:120px}
:root{
--primary:#0b5cad;
--primary-dark:#08457f;
--accent:#ff8c1a;
--text:#1f2d3d;
--muted:#6b7c8f;
--bg:#ffffff;
--soft:#f4f7fb;
--border:#e4ebf2;
--maxw:1200px;
--radius:14px;
--shadow:0 10px 30px rgba(15,60,110,.08);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
/* 渲染前隐藏整页，避免语言数据未就绪时闪现中文默认文本（数据就绪后由 JS 移除该类） */
html.lang-loading{visibility:hidden}
body{
font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,sans-serif;
color:var(--text);background:var(--bg);line-height:1.7;
-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}
/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;
padding:12px 26px;border-radius:50px;font-weight:600;font-size:15px;
transition:.25s;cursor:pointer;border:2px solid transparent}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px)}
.btn-ghost{border-color:#fff;color:#fff}
.btn-ghost:hover{background:#fff;color:var(--primary)}
.btn-block{width:100%}
/* ===== 顶部信息条 ===== */
.topbar{background:var(--primary-dark);color:#cfe0f2;font-size:13px}
.topbar-inner{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar-right a{color:#cfe0f2}
.topbar-right .sep{margin:0 10px;opacity:.4}
.topbar-right a:hover{color:#fff}
/* ===== 导航 ===== */
.header{position:sticky;top:0;z-index:100;background:#fff;
box-shadow:0 2px 16px rgba(15,60,110,.06)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:10px}
.logo-mark{width:40px;height:40px;border-radius:10px;background:var(--primary);
color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;letter-spacing:1px}
.logo-text{display:flex;flex-direction:column;line-height:1.1}
.logo-text strong{font-size:18px}
.logo-text em{font-size:10px;color:var(--muted);letter-spacing:1px}
.nav{display:flex;gap:4px}
.nav-link{padding:10px 14px;font-size:15px;font-weight:500;color:var(--text);border-radius:8px;transition:.2s}
.nav-link:hover,.nav-link.active{color:var(--primary);background:var(--soft)}
.header-cta{padding:9px 20px;font-size:14px}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:3px;background:var(--text);border-radius:2px;transition:.3s}
/* ===== 首页专用：导航悬浮在 Hero 之上（透明 → 滚动变白） ===== */
.home-page .topbar{position:relative;z-index:101;background:rgba(6,20,38,.55);border-bottom:1px solid rgba(255,255,255,.08);color:rgba(255,255,255,.8)}
.home-page .topbar-right a{color:rgba(255,255,255,.8)}
.home-page .topbar-right a:hover{color:#fff}
.home-page .header{position:fixed;top:38px;left:0;right:0;background:transparent;box-shadow:none;transition:background .35s,box-shadow .35s,color .35s}
.home-page .header-inner{height:76px}
.home-page .header .logo-text strong{color:#fff}
.home-page .header .logo-text em{color:rgba(255,255,255,.7)}
.home-page .header .nav-link{color:#fff}
.home-page .header .nav-link:hover,.home-page .header .nav-link.active{color:#fff;background:rgba(255,255,255,.14)}
.home-page .header .nav-toggle span{background:#fff}
.home-page .header .header-cta{background:#fff;color:var(--primary);border-color:#fff}
.home-page .header .header-cta:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
.home-page .header.header-scrolled{top:0;background:#fff;box-shadow:0 2px 16px rgba(15,60,110,.08)}
.home-page .header.header-scrolled .logo-text strong{color:var(--text)}
.home-page .header.header-scrolled .logo-text em{color:var(--muted)}
.home-page .header.header-scrolled .nav-link{color:var(--text)}
.home-page .header.header-scrolled .nav-link:hover,.home-page .header.header-scrolled .nav-link.active{color:var(--primary);background:var(--soft)}
.home-page .header.header-scrolled .nav-toggle span{background:var(--text)}
.home-page .header.header-scrolled .header-cta{background:#fff;color:var(--primary);border-color:#fff}
.home-page .header.header-scrolled .header-cta:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
/* ===== Hero ===== */
.hero{position:relative;overflow:hidden;background:#0a1f38;color:#fff;min-height:100vh;display:flex;align-items:center}
.hero-bg-wrap{position:absolute;inset:0;z-index:0;background:#0a1f38}
.hero-bg-wrap::before{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(105deg,rgba(0,0,0,.30) 0%,rgba(0,0,0,.12) 55%,rgba(0,0,0,0) 100%);pointer-events:none}
.hero-bg-slide{position:absolute;inset:0;opacity:0;transition:opacity .8s ease-in-out;background-size:cover;background-position:center;will-change:opacity}
.hero-bg-slide.active{opacity:1}
.hero-v2 .hero-inner{position:relative;z-index:2}
.hero-dots{position:absolute;left:50%;transform:translateX(-50%);bottom:42px;z-index:10;display:flex;gap:12px;padding:8px 14px;border-radius:999px;background:rgba(0,0,0,.22);backdrop-filter:blur(4px)}
.hero-dots .dot{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.55);cursor:pointer;transition:.25s;box-shadow:0 1px 3px rgba(0,0,0,.35)}
.hero-dots .dot.active{background:var(--accent);width:30px;border-radius:999px;box-shadow:0 2px 6px rgba(255,140,26,.45)}
/* 移动端关闭模糊重绘，避免滚动/轮播切换掉帧 */
@media (max-width:768px){
.hero-dots,.hero-advantages .highlight{backdrop-filter:none;-webkit-backdrop-filter:none}
.hero-dots{background:rgba(0,0,0,.32)}
.hero-advantages .highlight{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.2)}
}
@media (max-width:768px){.hero-dots{bottom:80px}}
.hero-v2 .hero-inner{position:relative;display:flex;flex-direction:column;justify-content:center;align-items:flex-start;
gap:32px;padding:140px 20px 100px;width:100%;min-height:100vh}
.hero-text{max-width:860px}
.hero-tag{display:inline-block;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.22);padding:8px 20px;border-radius:50px;font-size:14px;margin-bottom:22px;letter-spacing:1px}
.hero h1{font-size:62px;line-height:1.12;font-weight:800;margin-bottom:24px;text-shadow:0 4px 30px rgba(0,0,0,.45)}
.hero-sub{font-size:17px;line-height:1.6;color:rgba(255,255,255,.9);max-width:600px;margin-bottom:26px;text-shadow:0 2px 16px rgba(0,0,0,.45)}
/* 英文/越南文版副文案较长，单独再收紧一档，避免首屏板块被撑高 */
html[lang="en"] .hero-sub,html[lang="vi"] .hero-sub{font-size:16px;line-height:1.5;max-width:640px}
.hero-actions{display:flex;gap:18px;margin-bottom:46px}
.hero-actions .btn{padding:14px 32px;font-size:16px;border-radius:50px}
.hero-actions .btn-primary{background:#fff;color:var(--primary);border-color:#fff;box-shadow:0 8px 24px rgba(0,0,0,.15)}
.hero-actions .btn-primary:hover{background:var(--accent);color:#fff;border-color:var(--accent);box-shadow:0 8px 24px rgba(255,140,26,.35)}
.hero-actions .btn-ghost{background:#fff;color:var(--primary);border-color:#fff}
.hero-actions .btn-ghost:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
/* ===== 大号滚动数字 ===== */
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:48px;margin-bottom:10px}
.hero-stats div{display:flex;flex-direction:column;gap:6px;position:relative;min-width:0}
.hero-stats div::after{content:"";position:absolute;right:-24px;top:8px;bottom:8px;width:1px;background:rgba(255,255,255,.22)}
.hero-stats div:last-child::after{display:none}
.hero-stats strong{font-size:68px;font-weight:800;text-shadow:0 3px 24px rgba(0,0,0,.45);line-height:1;letter-spacing:-1px}
.hero-stats strong span{font-size:30px;color:var(--accent);margin-left:2px}
.hero-stats em{font-size:15px;color:rgba(255,255,255,.85);font-style:normal;text-shadow:0 1px 10px rgba(0,0,0,.4);font-weight:500;white-space:normal;line-height:1.45;word-break:break-word}
/* ===== Hero 内核心优势（仅卡片，无标题） ===== */
.hero-advantages{width:100%;margin-top:auto;padding-top:42px;display:flex;flex-direction:column;align-items:center}
.hero-advantages .ha-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;justify-content:center;width:100%}
.hero-advantages .highlight{display:flex;flex-direction:column;align-items:center;text-align:center;gap:14px;padding:26px 18px;border-radius:18px;
background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.16);backdrop-filter:blur(10px);
box-shadow:0 14px 34px rgba(0,0,0,.18);transition:.25s}
.hero-advantages .highlight:hover{transform:translateY(-6px);background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.24)}
.hero-advantages .h-ico{width:56px;height:56px;flex:none;border-radius:14px;
background:linear-gradient(135deg,rgba(11,92,173,.55),rgba(58,160,255,.45));
border:1px solid rgba(255,255,255,.22);display:flex;align-items:center;justify-content:center;font-size:26px;
box-shadow:0 8px 20px rgba(0,0,0,.22), inset 0 1px 0 rgba(255,255,255,.18)}
.hero-advantages .highlight strong{display:block;font-size:17px;color:#fff;margin-bottom:4px}
.hero-advantages .highlight em{font-size:13px;color:rgba(255,255,255,.78);font-style:normal;line-height:1.5}
/* ===== 向下滚动指示器 ===== */
.scroll-down{display:none}
.scroll-down span{width:4px;height:10px;background:rgba(255,255,255,.8);border-radius:2px;animation:scrollDown 1.6s infinite}
.scroll-down:hover{border-color:#fff}
@keyframes scrollDown{0%{transform:translateY(0);opacity:1}70%{transform:translateY(10px);opacity:.3}100%{transform:translateY(0);opacity:1}}
/* ===== 快捷亮点 ===== */
.highlights{background:#fff;border-bottom:1px solid var(--border)}
.highlights-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:30px 20px}
.highlight{display:flex;align-items:center;gap:16px;padding:24px 18px;border-radius:14px;background:var(--soft)}
.h-ico{width:54px;height:54px;flex:none;border-radius:14px;background:#fff;display:flex;align-items:center;justify-content:center;font-size:26px;box-shadow:var(--shadow)}
.h-ico svg{width:28px;height:28px;display:block}
.highlight strong{display:block;font-size:17px}
.highlight em{font-size:13px;color:var(--muted);font-style:normal}
/* ===== 通用 section ===== */
.section{padding:78px 0;position:relative;overflow:hidden}
.section:not(.section-soft){
background:
radial-gradient(circle at 100% 0%,rgba(11,92,173,.06),transparent 38%),
radial-gradient(circle at 0% 100%,rgba(255,140,26,.06),transparent 38%)}
.section .section-head{margin:0 auto 50px}
.section .section-head h2{font-size:40px}
.section .section-head h2::after{content:"";display:block;width:56px;height:4px;border-radius:4px;
background:var(--accent);margin:18px auto 0}
.section .section-head .lead{font-size:17px;margin-top:14px}
.section-soft{background:var(--soft)}
.section-head{text-align:center;max-width:760px;margin:0 auto 46px}
.section-head .lead{text-wrap:balance}
.eyebrow{color:var(--accent);font-weight:700;letter-spacing:2px;font-size:13px;margin-bottom:8px}
.section-head h2{font-size:34px;font-weight:800;margin-bottom:12px}
.lead{color:var(--muted);font-size:16px}
.sub-title{font-size:22px;font-weight:700;margin:48px 0 24px}
/* ===== 解决方案（north-sun 风格 · 白色背景） ===== */
.solution-section{background:#fff}
.solution-section .section-head{display:flex;flex-direction:column;align-items:center;margin-bottom:44px}
.solution-section .section-head h2{order:1;font-size:40px;margin-bottom:6px}
.solution-section .section-head h2::after{display:none}
.solution-section .section-head .eyebrow{order:2;color:var(--muted);font-size:13px;letter-spacing:3px;margin-bottom:10px}
.solution-section .section-head .lead{order:3;font-size:17px}
.solution-stage{display:grid;grid-template-columns:360px 1fr;min-height:480px;border-radius:20px;overflow:hidden;box-shadow:0 24px 60px rgba(15,60,110,.12);background:#fff;text-decoration:none;color:inherit;cursor:pointer;transition:transform .25s ease,box-shadow .25s ease}
.solution-stage:hover{transform:translateY(-4px);box-shadow:0 32px 72px rgba(15,60,110,.18)}
.solution-info{position:relative;background:var(--primary);color:#fff;padding:46px 40px;display:flex;flex-direction:column;justify-content:center;text-decoration:none}
.si-more{margin-top:30px;align-self:flex-start;font-size:15px;font-weight:700;letter-spacing:.5px;color:#fff;opacity:.92;display:inline-flex;align-items:center;gap:6px;transition:.25s}
.solution-stage:hover .si-more{gap:12px;opacity:1}
.solution-info-inner{transition:opacity .12s ease,transform .12s ease}
.solution-info-inner.si-fade-out{opacity:0;transform:translateY(6px)}
.solution-info-inner.si-fade-in{animation:siFadeIn .25s ease forwards}
@keyframes siFadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}
.si-icon{font-size:52px;margin-bottom:22px;display:block;color:#fff}
.si-icon svg{width:52px;height:52px;display:block}
.solution-info h3{font-size:30px;font-weight:800;margin-bottom:8px}
.si-en{font-size:13px;letter-spacing:2px;color:rgba(255,255,255,.75);margin-bottom:26px}
.si-desc{font-size:15px;line-height:1.85;color:rgba(255,255,255,.9);margin-bottom:34px}
.si-index{font-size:15px;font-weight:700;color:rgba(255,255,255,.7);letter-spacing:1px}
.solution-media{position:relative;overflow:hidden;background:#f4f7fb;display:block;text-decoration:none}
.solution-slider{position:absolute;inset:0;display:flex;width:100%;height:100%;transition:transform .35s cubic-bezier(.25,.1,.25,1)}
.solution-slider img{flex:0 0 100%;width:100%;height:100%;object-fit:cover;display:block}
.solution-slider .sol-frame{flex:0 0 100%;width:100%;height:100%;background-repeat:no-repeat;background-size:cover;background-position:center;filter:brightness(1) contrast(1.02) saturate(.95) sepia(.08) hue-rotate(-12deg)}
.solution-tabs{display:flex;flex-wrap:nowrap;margin-top:24px;border-radius:14px;overflow-x:auto;box-shadow:0 8px 24px rgba(15,60,110,.08);background:#fff;-webkit-overflow-scrolling:touch;scrollbar-width:none}
.solution-tabs::-webkit-scrollbar{display:none}
.solution-tab{cursor:pointer;background:#fff;border:0;border-right:1px solid var(--border);padding:20px 14px;text-align:center;transition:.25s;display:flex;flex-direction:column;align-items:center;gap:6px;flex:0 0 auto;min-width:126px;white-space:nowrap;text-decoration:none;color:inherit}
.solution-tab:last-child{border-right:0}
.solution-tab:hover{background:var(--soft)}
.solution-tab.active{background:var(--primary);color:#fff}
.solution-tab .tab-icon{font-size:26px;line-height:1}
.solution-tab .tab-name{font-size:14px;font-weight:700}
.solution-tab .tab-en{font-size:10px;letter-spacing:1px;color:var(--muted);text-transform:uppercase}
.solution-tab.active .tab-en{color:rgba(255,255,255,.75)}
@media (max-width:1024px){
.solution-stage{grid-template-columns:300px 1fr;min-height:420px}
.solution-info{padding:34px 28px}
.solution-info h3{font-size:26px}
.si-desc{font-size:14px}
}
@media (max-width:860px){
.solution-section .section-head h2{font-size:32px}
.solution-stage{grid-template-columns:1fr;min-height:auto}
.solution-info{padding:34px 28px}
.solution-media{height:320px;order:-1}
.solution-tab{min-width:112px;padding:16px 10px}
.solution-tab .tab-name{font-size:13px}
}
@media (max-width:640px){
.solution-media{height:260px}
.solution-info h3{font-size:24px}
.si-icon{font-size:42px}
.si-icon svg{width:42px;height:42px}
.solution-tab{min-width:100px;padding:14px 8px;gap:4px}
.solution-tab .tab-icon{font-size:22px}
.solution-tab .tab-name{font-size:12px}
}
/* ===== 产品分类 ===== */
.prod-cats{display:grid;grid-template-columns:repeat(5,1fr);gap:22px}
.prod-cat{background:#fff;border:1px solid var(--border);border-radius:var(--radius);
padding:40px 20px;text-align:center;transition:.25s;min-height:236px;display:flex;flex-direction:column;justify-content:center}
.prod-cat:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--primary)}
.pc-ico{width:74px;height:74px;margin:0 auto 18px;border-radius:18px;background:var(--soft);
display:flex;align-items:center;justify-content:center}
.pc-ico svg{width:44px;height:44px}
.prod-cat h3{font-size:19px;margin-bottom:10px}
.prod-cat p{font-size:14px;line-height:1.7;color:var(--muted)}
/* ===== 产品卡片 ===== */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:.25s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.card-img{height:160px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:18px;
background:linear-gradient(135deg,var(--c1,#0b5cad),var(--c2,#3aa0ff))}
.card-body{padding:18px 20px}
.card-body h4{font-size:17px;margin-bottom:8px}
.card-body p{font-size:13px;color:var(--muted);margin-bottom:12px}
.more{color:var(--primary);font-weight:600;font-size:14px}
.more:hover{color:var(--accent)}
/* ===== 首页公司简介：蓝网络节点科技风 · 与新闻区共用 fixed 背景 ===== */
#aboutHome{
background:url('/assets/img/news-bg.svg') center/cover no-repeat fixed;
color:#fff;position:relative;overflow:hidden
}
#aboutHome::before{content:"";position:absolute;inset:0;opacity:.08;pointer-events:none;
background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
background-size:70px 70px}
#aboutHome > .container{position:relative;z-index:1}
.about-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:50px;align-items:center}
.about-text h2{color:#fff;font-size:40px;font-weight:800;margin:8px 0 18px}
.about-text p{color:rgba(255,255,255,.82);margin-bottom:14px;line-height:1.85}
.about-text .eyebrow{color:#00f0ff;font-weight:700;letter-spacing:4px;font-size:12px;margin-bottom:10px}
.about-text h2::after{content:"";display:block;width:56px;height:3px;background:#00f0ff;margin-top:16px;box-shadow:0 0 12px #00f0ff}
.about-text-glass{background:rgba(0,20,40,.5);border:1px solid rgba(0,240,255,.25);border-radius:18px;padding:34px;backdrop-filter:blur(8px)}
.about-btn-glow{margin-top:24px;display:inline-block;padding:14px 30px;border:1.5px solid #fff;color:var(--primary);border-radius:6px;font-weight:700;font-size:15px;text-decoration:none;transition:.25s;background:#fff;box-shadow:0 0 22px rgba(0,0,0,.15)}
.about-btn-glow:hover{background:var(--accent);color:#fff;border-color:var(--accent);box-shadow:0 0 22px rgba(255,140,26,.35)}
.about-stats-glass{display:grid;grid-template-columns:1fr 1fr;gap:18px}
/* 默认（浅色页如 about.html）：浅色卡片 + 深色字 + 青色点缀 */
.stat-card{position:relative;background:#fff;border:1px solid rgba(0,160,200,.18);border-radius:14px;padding:24px 22px;box-shadow:0 6px 22px rgba(20,60,90,.08);display:flex;flex-direction:column;gap:6px}
.stat-card .dot{position:absolute;top:14px;left:14px;width:7px;height:7px;border-radius:50%;background:#00b4d8;box-shadow:0 0 8px rgba(0,180,216,.6)}
.stat-card strong{display:block;font-size:64px;font-weight:800;color:#0a2740;line-height:1;letter-spacing:-1px}
.stat-card strong span{font-size:24px;color:#00b4d8;margin-left:2px;font-weight:700}
.stat-card em{font-style:normal;color:#5a6b78;font-size:15px;line-height:1.5}
/* 首页蓝网络背景下的玻璃卡片变体 */
#aboutHome .stat-card{background:rgba(0,20,40,.5);border:1px solid rgba(0,240,255,.35);backdrop-filter:blur(8px);box-shadow:none}
#aboutHome .stat-card .dot{background:#00f0ff;box-shadow:0 0 8px #00f0ff}
#aboutHome .stat-card strong{color:#fff}
#aboutHome .stat-card strong span{color:#00f0ff}
#aboutHome .stat-card em{color:rgba(255,255,255,.75)}
/* stat-card 立体悬浮效果（hover 抬升，无持续浮动） */
.about-stats-glass{perspective:1000px}
.stat-card{transform-style:preserve-3d;transition:transform .35s ease,box-shadow .35s ease,border-color .35s ease}
.stat-card:hover{transform:translateY(-12px) scale(1.03) rotateX(2deg);border-color:rgba(0,180,216,.55);box-shadow:0 20px 40px rgba(15,45,75,.18)}
#aboutHome .stat-card:hover{border-color:rgba(0,240,255,.65);box-shadow:0 20px 40px rgba(0,0,0,.35),0 0 24px rgba(0,240,255,.25)}
/* ===== 应用案例详情 ===== */
.case-layout{display:grid;grid-template-columns:1.5fr 1fr;gap:40px;align-items:start}
.case-detail{display:flex;flex-direction:column;gap:22px}
.case-cover img{width:100%;border-radius:var(--radius);display:block;box-shadow:var(--shadow)}
.case-videos{display:flex;flex-direction:column;gap:16px}
.case-video video{width:100%;border-radius:var(--radius);background:#000;display:block}
.case-text p{color:#445;line-height:1.8;margin-bottom:12px}
.case-text p:last-child{margin-bottom:0}
.case-aside .contact-form{position:sticky;top:90px}
.case-gallery-section{background:#f8fafc;padding:56px 0 64px}
.case-gallery-title{font-size:28px;font-weight:700;color:#0a2540;margin-bottom:24px;text-align:center}
.case-gallery-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.case-gallery-item{overflow:hidden;border-radius:var(--radius);box-shadow:var(--shadow);background:#fff;cursor:zoom-in}
.case-gallery-item img{width:100%;aspect-ratio:16/10;object-fit:cover;display:block;transition:transform .35s ease}
.case-gallery-item:hover img{transform:scale(1.05)}
.case-gallery-empty{color:#789;font-size:15px;text-align:center;padding:30px 0}
.case-lightbox{position:fixed;inset:0;background:rgba(8,25,45,.92);z-index:2000;display:flex;flex-direction:column;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:opacity .25s,visibility .25s}
.case-lightbox.active{opacity:1;visibility:visible}
.case-lightbox-img{max-width:90vw;max-height:82vh;border-radius:var(--radius);box-shadow:0 20px 60px rgba(0,0,0,.35)}
.case-lightbox-title{margin-top:14px;color:#fff;font-size:16px;text-align:center;padding:0 20px}
.case-lightbox-close{position:absolute;top:18px;right:24px;background:none;border:none;color:#fff;font-size:42px;line-height:1;cursor:pointer;opacity:.8;transition:opacity .2s}
.case-lightbox-close:hover{opacity:1}
/* ===== 荣誉资质 ===== */
.honor-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:18px}
.honor{background:var(--soft);border-radius:var(--radius);padding:26px 14px;text-align:center;transition:.25s}
.honor:hover{background:var(--primary);color:#fff}
.honor-ico{width:56px;height:56px;margin:0 auto 12px;border-radius:50%;background:var(--primary);color:#fff;
display:flex;align-items:center;justify-content:center;font-weight:800;font-size:15px}
.honor:hover .honor-ico{background:#fff;color:var(--primary)}
.honor h4{font-size:14px}
.honor.has-image{padding:14px 14px 18px}
.honor.has-image:hover{background:var(--soft);color:var(--text)}
.honor-img{width:100%;aspect-ratio:4/3;border-radius:8px;overflow:hidden;background:#f5f6f8;margin-bottom:10px}
.honor-img img{width:100%;height:100%;object-fit:contain;display:block}
/* ===== 核心优势 ===== */
.merit-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.merit{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:30px 26px;position:relative;transition:.25s}
.merit:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.merit-no{font-size:34px;font-weight:800;color:var(--soft);position:absolute;top:18px;right:22px}
.merit h4{font-size:18px;margin-bottom:8px;color:var(--primary)}
.merit p{font-size:14px;color:var(--muted)}
/* ===== 应用领域 ===== */
.app-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.app{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:42px 18px;text-align:center;
font-size:18px;font-weight:600;transition:.25s;min-height:124px;display:flex;align-items:center;justify-content:center}
.app:hover{background:var(--primary);color:#fff;transform:translateY(-4px)}
/* ===== 新闻 ===== */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;display:flex;transition:.25s}
.news:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.news-date{flex:none;width:78px;background:var(--primary);color:#fff;display:flex;flex-direction:column;
align-items:center;justify-content:center;font-size:13px}
.news-date span{font-size:26px;font-weight:800;line-height:1}
.news-body{padding:18px 20px}
.tag{display:inline-block;background:var(--soft);color:var(--primary);font-size:12px;padding:2px 10px;border-radius:50px;margin-bottom:8px}
.news-body h4{font-size:16px;margin-bottom:8px;line-height:1.4}
.news-body p{font-size:13px;color:var(--muted);margin-bottom:10px}
/* ===== 首页新闻轮播（一行三个 + 左右箭头 + 自动滚动） ===== */
.news-carousel{position:relative}
.nc-viewport{overflow:hidden;margin:0 44px}
.nc-track{display:flex;gap:24px;transition:transform .45s ease}
.nc-card{flex:0 0 calc(33.333% - 16px);background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:.25s}
.nc-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.nc-cover{height:190px;background-size:cover;background-position:center}
.nc-body{padding:16px 18px}
.nc-date{color:var(--muted);font-size:13px;margin-bottom:8px}
.nc-date span{color:var(--primary);font-size:24px;font-weight:800;display:block;line-height:1;margin-bottom:2px}
.nc-tag{display:inline-block;background:var(--soft);color:var(--primary);font-size:12px;padding:2px 10px;border-radius:50px;margin-bottom:8px}
.nc-body h4{font-size:16px;margin-bottom:8px;line-height:1.4}
.nc-body p{font-size:13px;color:var(--muted);margin-bottom:12px;line-height:1.55}
.nc-arrow{position:absolute;top:50%;transform:translateY(-50%);width:42px;height:42px;border:0;border-radius:50%;background:#fff;color:var(--primary);font-size:28px;line-height:1;box-shadow:0 4px 14px rgba(0,0,0,.12);cursor:pointer;transition:.2s;display:flex;align-items:center;justify-content:center;z-index:2}
.nc-arrow:hover{background:var(--primary);color:#fff}
.nc-prev{left:0}
.nc-next{right:0}
#news .container{max-width:1320px}
#news{
background:url('/assets/img/news-bg.svg') center/cover no-repeat fixed;
color:#fff;position:relative
}
#news::before{
content:"";position:absolute;inset:0;
background-image:
linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
background-size:70px 70px;pointer-events:none
}
#news .section-head h2,#news .section-head .lead,#news .eyebrow{color:#fff}
#news .section-head h2{text-shadow:0 2px 12px rgba(0,0,0,.4)}
#news .section-head .lead{opacity:.9}
#news .nc-card{background:#fff;border-color:rgba(255,255,255,.7);box-shadow:0 10px 30px rgba(0,0,0,.25)}
#news .nc-body h4{color:#0a2540}
#news .nc-body p{color:#5b6b7c}
#news .nc-date{color:#7a8aa0}
#news .nc-date span{color:#0b5cad}
#news .nc-tag{background:#e3f0fb;color:#0b5cad}
#news .nc-arrow{background:#fff;color:var(--primary);box-shadow:0 4px 14px rgba(0,0,0,.2)}
#news .nc-arrow:hover{background:var(--primary);color:#fff}
#news .more{color:var(--primary)}
/* ===== 首页公司简介：恢复白色背景 ===== */
@media(max-width:991px){
.nc-card{flex:0 0 calc(50% - 12px)}
}
@media(max-width:640px){
.nc-viewport{margin:0 36px}
.nc-card{flex:0 0 100%}
.nc-arrow{width:34px;height:34px;font-size:22px}
}
/* ===== 联系我们 ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.contact-info h2{font-size:32px;font-weight:800;margin:8px 0 22px}
.info-list{list-style:none}
.info-list li{display:flex;gap:14px;padding:14px 0;border-bottom:1px dashed var(--border)}
.info-list span{font-size:20px}
.info-list strong{display:block;font-size:14px;color:var(--muted)}
.contact-form{background:var(--soft);border-radius:var(--radius);padding:30px}
.contact-form h3{font-size:19px;margin-bottom:18px}
.field{margin-bottom:14px}
.field input,.field textarea{width:100%;padding:13px 16px;border:1px solid var(--border);border-radius:10px;
font-size:15px;font-family:inherit;background:#fff;resize:vertical}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--primary)}
.form-tip{font-size:14px;color:var(--primary);margin-top:10px;min-height:20px}
/* ===== 页脚：沿用科技背景 ===== */
.site-foot{
background:url('/assets/img/news-bg.svg') center/cover no-repeat fixed;
color:#aebfce;margin-top:0;position:relative
}
.site-foot::before{
content:"";position:absolute;inset:0;
background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
background-size:70px 70px;pointer-events:none;z-index:0
}
.site-foot::after{
content:"";position:absolute;inset:0;
background:linear-gradient(to bottom,
transparent 0%,
transparent 40px,
rgba(6,18,32,.55) 120px,
rgba(6,18,32,.55) 100%);
pointer-events:none;z-index:0
}
.site-foot .footer-inner{position:relative;z-index:1}
.site-foot-inner,.footer-inner{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding:54px 20px 40px}
.site-foot .logo-text strong{color:#fff}
.site-foot .logo-text em{color:#7c93a8}
.site-foot-col p{font-size:14px;margin-top:14px}
.site-foot-col h4{color:#fff;font-size:16px;margin-bottom:18px}
.site-foot-col a{display:block;font-size:14px;padding:6px 0;color:#aebfce;transition:.2s}
.site-foot-col a:hover{color:var(--accent);padding-left:6px}
.site-foot-bottom{border-top:1px solid rgba(255,255,255,.08);padding:16px 0;font-size:12px}
.site-foot-bottom .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
.site-foot-bottom span{opacity:.8}
/* ===== 返回顶部 ===== */
.back-top{position:fixed;right:24px;bottom:24px;width:46px;height:46px;border-radius:50%;
background:var(--primary);color:#fff;border:0;font-size:20px;cursor:pointer;opacity:0;
pointer-events:none;transition:.3s;z-index:90;box-shadow:var(--shadow)}
.back-top.show{opacity:1;pointer-events:auto}
.back-top:hover{background:var(--primary-dark)}
/* ===== 内页页头 Banner ===== */
.page-banner{position:relative;overflow:hidden;color:#fff;padding:104px 0 88px;
background:url('/assets/img/news-bg.svg') center/cover no-repeat fixed;
display:flex;align-items:center;min-height:320px}
.page-banner::before{content:"";position:absolute;inset:0;opacity:.12;pointer-events:none;
background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
background-size:70px 70px}
.page-banner .container{position:relative;width:100%}
.pb-eyebrow{color:#ffd9b0;font-weight:700;letter-spacing:2px;font-size:14px;margin-bottom:10px}
.page-banner h1{font-size:48px;line-height:1.2;font-weight:800;margin-bottom:14px}
.page-banner p.pb-sub{font-size:17px;line-height:1.8;color:rgba(255,255,255,.92);max-width:660px}
.breadcrumb{margin-top:20px;display:inline-flex;align-items:center;gap:10px;padding:11px 22px;font-size:17px;font-weight:600;color:rgba(255,255,255,.9);background:rgba(0,0,0,.22);border:1px solid rgba(255,255,255,.12);border-radius:30px;backdrop-filter:blur(8px);box-shadow:0 4px 14px rgba(0,0,0,.12)}
.breadcrumb a{display:inline-flex;align-items:center;color:rgba(255,255,255,.9);transition:.2s}
.breadcrumb a:hover{color:#fff;text-decoration:none}
.breadcrumb .sep{margin:0 4px;opacity:.7;font-weight:400}
.breadcrumb .cur{color:#ffd9b0;font-weight:700}
.breadcrumb .back{display:inline-flex;align-items:center;gap:6px;margin-right:6px;padding:7px 13px 7px 11px;color:#fff;background:rgba(255,255,255,.18);border-radius:20px;font-weight:700;transition:.2s}
.breadcrumb .back:hover{background:rgba(255,255,255,.32)}
.breadcrumb .back svg{width:14px;height:14px;fill:currentColor}
@media (max-width:600px){
.breadcrumb{font-size:15px;padding:9px 16px;gap:7px;border-radius:24px}
.breadcrumb .back{padding:6px 11px 6px 9px}
.breadcrumb .back svg{width:12px;height:12px}
}
/* ===== 新闻列表页 ===== */
.news-list{display:grid;grid-template-columns:1fr;gap:20px}
.news-list .news{max-width:none}
/* ===== CTA 区块 ===== */
.contact-band{
position:relative;
background:url('/assets/img/news-bg.svg') center/cover no-repeat fixed;
color:#fff;text-align:center;padding:56px 0
}
.contact-band::before{
content:"";position:absolute;inset:0;
background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
background-size:70px 70px;pointer-events:none
}
.contact-band .container{position:relative;z-index:1}
.contact-band h2{font-size:30px;font-weight:800;margin-bottom:10px}
.contact-band p{color:rgba(255,255,255,.9);margin-bottom:24px}
.contact-band .btn-ghost{padding:14px 34px;border:1.5px solid #fff;border-radius:6px;background:#fff;color:var(--primary);font-weight:700;font-size:16px;box-shadow:0 0 22px rgba(0,0,0,.15);transition:.25s}
.contact-band .btn-ghost:hover{background:var(--accent);color:#fff;border-color:var(--accent);box-shadow:0 0 22px rgba(255,140,26,.35)}
/* ===== 首页板块：内容饱满、视觉充实（避免空旷） ===== */
.home-section{padding:78px 0;display:flex;flex-direction:column;justify-content:center;position:relative;overflow:hidden}
.home-section > .container{width:100%;position:relative;z-index:1}
.home-section:not(.section-soft){
background:
radial-gradient(circle at 100% 0%,rgba(11,92,173,.06),transparent 38%),
radial-gradient(circle at 0% 100%,rgba(255,140,26,.06),transparent 38%)}
.home-section .section-head{margin:0 auto 50px}
.home-section .section-head h2{font-size:40px}
.home-section .section-head h2::after{content:"";display:block;width:56px;height:4px;border-radius:4px;
background:var(--accent);margin:18px auto 0}
.home-section .section-head .lead{font-size:18px;margin-top:14px}
.home-section .btn{font-size:16px;padding:14px 32px}
.highlights.home-section{padding:56px 0}
.highlights.home-section .highlights-grid{padding:0 20px}
.about-grid.home-section .about-text h2{font-size:40px}
/* ===== 响应式断点 ===== */
@media (max-width:1024px){
.prod-cats{grid-template-columns:repeat(3,1fr)}
.cards{grid-template-columns:repeat(2,1fr)}
.honor-grid{grid-template-columns:repeat(3,1fr)}
.hero h1{font-size:38px}
}
@media (max-width:860px){
.home-section{min-height:auto;padding:60px 0}
.home-section .section-head h2{font-size:30px}
.home-section .about-text h2{font-size:30px}
.case-layout{grid-template-columns:1fr;gap:30px}
.case-aside .contact-form{position:static}
.case-gallery-grid{grid-template-columns:repeat(2,1fr);gap:14px}
.case-gallery-title{font-size:24px;margin-bottom:18px}
.nav{position:fixed;top:110px;left:0;right:0;background:#fff;flex-direction:column;
padding:14px 20px;gap:2px;box-shadow:0 12px 30px rgba(15,60,110,.12);
transform:translateY(-130%);transition:.35s;z-index:99}
.nav.open{transform:translateY(0)}
.nav-link{padding:12px 14px}
.header-cta{display:none}
.nav-toggle{display:flex}
.hero-inner{grid-template-columns:1fr;text-align:center;padding:56px 20px 64px}
.hero-actions,.hero-stats{justify-content:center}
.about-grid{grid-template-columns:1fr;gap:30px}
.about-stats-glass{grid-template-columns:1fr 1fr;gap:16px}
.stat-card strong{font-size:48px}
.contact-grid{grid-template-columns:1fr}
.site-foot-inner,.footer-inner{grid-template-columns:1fr;gap:26px}
}
@media (max-width:640px){
.topbar-left{display:none}
.page-banner{padding:56px 0 48px;min-height:auto}
.page-banner h1{font-size:30px}
.topbar-inner{justify-content:center}
.highlights-grid{grid-template-columns:1fr 1fr;gap:12px;padding:18px 16px}
.section{padding:54px 0}
.section-head h2{font-size:27px}
.hero h1{font-size:32px}
.prod-cats{grid-template-columns:1fr 1fr}
.cards{grid-template-columns:1fr}
.honor-grid{grid-template-columns:1fr 1fr}
.merit-grid{grid-template-columns:1fr}
.app-grid{grid-template-columns:1fr 1fr}
.news-grid{grid-template-columns:1fr}
.about-stats{grid-template-columns:1fr 1fr}
.footer-bottom .container{flex-direction:column}
.site-foot-bottom .container{flex-direction:column}
}
@media (max-width:400px){
.prod-cats{grid-template-columns:1fr}
.app-grid{grid-template-columns:1fr}
}
/* ===== 首页改版响应式补充 ===== */
@media (max-width:1024px){
.hero-v2 .hero-inner{padding:130px 20px 90px}
.hero h1{font-size:48px}
.hero-stats{gap:42px}
.hero-stats strong{font-size:54px}
.hero-stats strong span{font-size:24px}
.hero-stats div::after{right:-21px}
.hero-advantages .ha-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:860px){
.home-page .header{top:0}
.home-page .header .header-cta{display:none}
.home-page .header .nav-toggle span{background:#fff}
.home-page .header.header-scrolled .nav-toggle span{background:var(--text)}
.home-page .nav{top:76px;background:rgba(10,31,56,.96);border-top:1px solid rgba(255,255,255,.1)}
.home-page .nav-link{color:#fff}
.home-page .nav-link:hover,.home-page .nav-link.active{color:#fff;background:rgba(255,255,255,.12)}
.hero-v2 .hero-inner{align-items:center;text-align:center;padding:120px 20px 90px}
.hero-sub{margin-left:auto;margin-right:auto}
.hero-actions{justify-content:center}
.hero-stats{grid-template-columns:repeat(4,1fr);justify-content:center;gap:32px}
.hero-stats strong{font-size:46px}
.hero-stats strong span{font-size:22px}
.hero-stats div::after{right:-16px}
.hero-advantages .ha-grid{grid-template-columns:1fr 1fr;gap:12px}
.hero-advantages .highlight{padding:18px 14px}
.hero-advantages .h-ico{width:44px;height:44px;font-size:20px}
.hero-advantages .highlight strong{font-size:15px}
.hero-advantages .highlight em{font-size:12px}
}
@media (max-width:640px){
.hero h1{font-size:34px}
.hero-sub{font-size:16px}
.hero-actions .btn{padding:12px 24px;font-size:15px}
.hero-stats{grid-template-columns:repeat(2,1fr);gap:24px}
.hero-stats strong{font-size:40px}
.hero-stats strong span{font-size:18px}
.hero-stats div::after{display:none}
.hero-advantages .ha-grid{grid-template-columns:1fr;gap:10px}
.hero-advantages .highlight{flex-direction:column;align-items:center;text-align:center}
.scroll-down{display:none}
}
/* ===== 产品内页 ===== */
.pd-summary{font-size:18px;color:var(--muted);line-height:1.8;margin:0 0 28px;max-width:860px}
.pd-intro{max-width:860px;color:#445;font-size:16px;line-height:1.9}
.pd-intro p{margin-bottom:14px}
.pd-block{margin-top:50px}
.pd-block h2{font-size:26px;font-weight:800;margin-bottom:22px;display:flex;align-items:center;gap:10px}
.pd-block h2::before{content:"";width:6px;height:24px;background:var(--accent);border-radius:3px;display:inline-block}
.pd-features{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.pd-feature{display:flex;align-items:flex-start;gap:14px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:22px;transition:.25s}
.pd-feature:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--primary)}
.pd-fico{width:34px;height:34px;flex:none;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700}
.pd-feature strong{font-size:16px;line-height:1.5}
.pd-specs{display:grid;grid-template-columns:1fr 1fr;gap:14px;max-width:860px}
.pd-spec{display:flex;justify-content:space-between;align-items:center;gap:16px;background:var(--soft);border-radius:10px;padding:16px 20px}
.pd-spec-name{color:var(--muted);font-size:15px}
.pd-spec-val{font-weight:700;color:var(--text);font-size:15px;text-align:right}
.pd-gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.pd-gimg-wrap{overflow:hidden;border-radius:var(--radius);box-shadow:var(--shadow);cursor:pointer}
.pd-gimg{height:280px;background:#fff;background-size:cover;background-repeat:no-repeat;background-position:center;transition:transform .4s ease}
.pd-gimg-wrap:hover .pd-gimg{transform:scale(1.08)}
.pd-notfound{display:none;background:var(--soft);padding:90px 0;text-align:center;color:var(--muted)}
/* ===== 产品图集 Lightbox（半屏放大查看） ===== */
.omtk-lightbox{position:fixed;inset:0;background:rgba(0,0,0,.88);z-index:9999;display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease}
.omtk-lightbox.open{opacity:1;visibility:visible}
.omtk-lightbox__inner{position:relative;width:92vw;max-width:1200px;height:85vh;background:#fff;border-radius:12px;overflow:hidden;display:flex;align-items:center;justify-content:center;box-shadow:0 25px 80px rgba(0,0,0,.45)}
.omtk-lightbox__img{max-width:100%;max-height:100%;object-fit:contain;display:block}
.omtk-lightbox__close{position:absolute;top:16px;right:16px;width:44px;height:44px;border:none;border-radius:50%;background:rgba(0,0,0,.55);color:#fff;font-size:26px;line-height:44px;text-align:center;cursor:pointer;transition:background .2s}
.omtk-lightbox__close:hover{background:rgba(0,0,0,.8)}
.omtk-lightbox__caption{position:absolute;left:0;right:0;bottom:0;padding:16px 24px;background:linear-gradient(transparent,rgba(0,0,0,.6));color:#fff;font-size:14px;text-align:center}
@media(max-width:640px){
.omtk-lightbox__inner{width:100vw;height:80vh;border-radius:0}
.omtk-lightbox__close{top:10px;right:10px;width:40px;height:40px;line-height:40px;font-size:22px}
}
/* ---- 紧固件详情页：主图 + 缩略图 ---- */
.fd-detail-top{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:42px;align-items:start;margin-bottom:32px}
.fd-main-media{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.fd-main-media img{width:100%;height:auto;max-height:520px;object-fit:contain;display:block;border-radius:8px}
.fd-info-side{padding-top:10px}
.fd-info-side h1{font-size:32px;font-weight:800;color:var(--text);margin-bottom:10px}
.fd-subtitle{font-size:18px;color:var(--primary);font-weight:600;margin-bottom:18px}
.fd-summary{font-size:16px;color:var(--muted);line-height:1.8}
.fd-thumb-list{display:flex;gap:12px;flex-wrap:wrap;margin:-18px 0 38px}
.fd-thumb{width:78px;height:78px;padding:4px;background:#fff;border:2px solid var(--border);border-radius:10px;cursor:pointer;transition:border-color .2s,box-shadow .2s;overflow:hidden}
.fd-thumb img{width:100%;height:100%;object-fit:cover;border-radius:6px}
.fd-thumb.active,.fd-thumb:hover{border-color:var(--primary);box-shadow:0 0 0 3px rgba(11,92,173,.12)}
@media (max-width:900px){
.fd-detail-top{grid-template-columns:1fr;gap:24px}
.fd-info-side h1{font-size:26px}
.fd-main-media img{max-height:380px}
}
.pd-notfound a{color:var(--primary);font-weight:600}
@media(max-width:860px){
.pd-features{grid-template-columns:1fr}
.pd-specs{grid-template-columns:1fr}
.pd-gallery{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
.pd-gallery{grid-template-columns:1fr}
.case-gallery-grid{grid-template-columns:1fr}
}
/* ===== 后台可编辑：首页图片 ===== */
.pc-thumb{width:74px;height:74px;margin:0 auto 18px;border-radius:18px;background-size:cover;background-position:center;box-shadow:var(--shadow)}
.hero-photo{width:100%;max-width:560px;border-radius:18px;filter:drop-shadow(0 24px 50px rgba(0,0,0,.25))}
.about-img{width:100%;max-width:540px;border-radius:14px;margin:0 0 18px;box-shadow:var(--shadow)}
.news-cover{width:120px;flex:none;min-height:120px;background-size:cover;background-position:center}
@media(max-width:768px){
.news-cover{width:90px;min-height:90px}
}
/* ===== 多语言浮动切换器 ===== */
.lang-pill{position:fixed;top:14px;right:14px;z-index:9999;display:flex;gap:4px;background:rgba(255,255,255,.92);backdrop-filter:blur(6px);padding:5px;border-radius:999px;box-shadow:0 6px 20px rgba(0,0,0,.18);font-size:13px}
.lang-pill button{border:0;background:transparent;color:#5a6b7d;padding:6px 12px;border-radius:999px;cursor:pointer;font-weight:600;line-height:1;transition:.15s}
.lang-pill button:hover{background:#eef4fb;color:#0b5cad}
.lang-pill button.active{background:#0b5cad;color:#fff}
body{transition:opacity .12s ease}
body.lang-fade{opacity:0}
@media(max-width:768px){
.lang-pill{top:8px;right:8px;padding:3px}
.lang-pill button{padding:5px 9px;font-size:12px}
}
/* ===== 解决方案列表页（north-sun 风格：大图 + 图标/标题/描述/箭头 横向信息条） ===== */
.solutions-page-section{background:#fff}
.solutions-page-section .section-head{display:flex;flex-direction:column;align-items:center;margin-bottom:44px}
.solutions-page-section .section-head h2{order:1;font-size:40px;margin-bottom:6px}
.solutions-page-section .section-head h2::after{display:none}
.solutions-page-section .section-head .eyebrow{order:2;color:var(--muted);font-size:13px;letter-spacing:3px;margin-bottom:10px}
.solutions-page-section .section-head .lead{order:3;font-size:17px}
.solution-page-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:30px}
.solution-card{position:relative;display:block;background:#fff;border:1px solid var(--border);border-radius:20px;overflow:hidden;box-shadow:0 10px 32px rgba(15,60,110,.08);transition:.3s;text-decoration:none;color:var(--text)}
.solution-card:hover{transform:translateY(-6px);box-shadow:0 22px 50px rgba(15,60,110,.14);border-color:rgba(11,92,173,.2)}
.solution-card-media{height:320px;overflow:hidden;transition:transform .5s ease}
.solution-card-media img{width:100%;height:100%;object-fit:cover;display:block;background:#eef3f8}
.solution-card:hover .solution-card-media{transform:scale(1.04)}
.solution-card-body{padding:26px 30px;display:flex;align-items:center;gap:18px}
.sc-icon{width:56px;height:56px;flex:none;display:flex;align-items:center;justify-content:center;font-size:28px;border-radius:50%;background:#fff;border:1px solid rgba(11,92,173,.2);box-shadow:0 4px 12px rgba(11,92,173,.08)}
.sc-main{flex:1;min-width:0;text-align:left}
.sc-main h3{font-size:22px;font-weight:800;margin:0 0 6px;line-height:1.3;color:var(--primary);transition:.25s}
.solution-card:hover .sc-main h3{color:var(--primary-dark)}
.sc-desc{font-size:14px;line-height:1.65;color:var(--muted);margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.sc-arrow{flex:none;width:44px;height:44px;display:flex;align-items:center;justify-content:center;border-radius:50%;border:1px solid var(--border);font-size:22px;color:var(--primary);transition:.25s}
.solution-card:hover .sc-arrow{background:var(--primary);color:#fff;border-color:var(--primary)}
@media (max-width:860px){
.solutions-page-section .section-head h2{font-size:32px}
.solution-page-grid{grid-template-columns:1fr;gap:22px}
.solution-card-media{height:260px}
.solution-card-body{padding:20px 22px;gap:14px}
.sc-icon{width:48px;height:48px;font-size:24px}
.sc-main h3{font-size:20px}
}
@media (max-width:480px){
.solution-card-body{flex-wrap:wrap}
.sc-arrow{margin-left:auto}
}
/* ===== 解决方案页底部 CTA ===== */
.sol-band{position:relative;padding:90px 0;text-align:center;color:#fff;overflow:hidden;background:linear-gradient(135deg,#0b5cad 0%,#0a4a8a 50%,#073666 100%)}
.sol-bg{position:absolute;inset:0;background:url('/assets/img/hero-industrial.svg') center/cover no-repeat;opacity:.18;pointer-events:none}
.sol-inner{position:relative;z-index:1}
.sol-band h2{font-size:36px;font-weight:800;margin-bottom:14px;text-shadow:0 2px 16px rgba(0,0,0,.25)}
.sol-band p{font-size:17px;color:rgba(255,255,255,.9);margin-bottom:28px;text-shadow:0 1px 10px rgba(0,0,0,.2)}
.sol-band .btn-ghost{background:#fff;color:var(--primary);border-color:#fff;padding:14px 34px;font-size:16px;font-weight:700;box-shadow:0 8px 24px rgba(0,0,0,.2)}
.sol-band .btn-ghost:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
@media (max-width:768px){
.sol-band{padding:64px 0}
.sol-band h2{font-size:28px}
.sol-band p{font-size:15px}
}
/* ===== 产品中心横向手风琴（参考 banxi.net 产品与服务） ===== */
.product-accordion{display:flex;gap:14px;width:100%;align-items:stretch}
.pa-item{flex:1;position:relative;height:480px;border-radius:14px;overflow:hidden;background-size:cover;background-position:center;transition:flex .6s ease,text-shadow .6s ease;text-decoration:none;color:#fff}
.pa-item::after{content:'';position:absolute;inset:0;background:linear-gradient(to top,rgba(0,0,0,.55) 0%,rgba(0,0,0,.22) 50%,rgba(0,0,0,.08) 100%);z-index:1;transition:background .6s ease}
.pa-item.on::after,.pa-item:hover::after{background:linear-gradient(to top,rgba(0,0,0,.62) 0%,rgba(0,0,0,.28) 55%,rgba(0,0,0,.1) 100%)}
.pa-info{position:absolute;left:0;bottom:0;width:100%;padding:26px 22px;z-index:2;color:#fff;display:flex;flex-direction:column;justify-content:flex-end;transform:translateY(28%);transition:transform .6s ease}
.pa-item.on .pa-info,.pa-item:hover .pa-info{transform:translateY(0)}
.pa-title{display:block;font-size:20px;font-weight:800;margin-bottom:12px;line-height:1.35;transform:scale(.92);transform-origin:left bottom;transition:transform .6s ease;white-space:nowrap}
.pa-item.on .pa-title,.pa-item:hover .pa-title{transform:scale(1)}
.pa-desc{font-size:14px;line-height:1.7;opacity:0;margin-bottom:18px;transition:opacity .6s ease;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.pa-item.on .pa-desc,.pa-item:hover .pa-desc{opacity:1}
.pa-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease;color:#fff}
.pa-item.on .pa-more,.pa-item:hover .pa-more{opacity:1;transform:translateY(0)}
.pa-more::after{content:'→';transition:transform .25s ease}
.pa-item:hover .pa-more::after{transform:translateX(4px)}
@media (any-hover: hover) {
.pa-item:hover{flex:1.75}
}
.pa-item.on{flex:1.75}
/* 前三张产品手风琴卡片去蓝调、偏暖 */
.pa-item:nth-child(-n+3){
filter: sepia(0.12) saturate(0.88) hue-rotate(-8deg) brightness(1.05);
}
/* 英文/越南语状态下产品手风琴标题允许换行（避免长文被截断） */
html[lang="en"] .pa-title,
html[lang="vi"] .pa-title{white-space:normal;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
/* 英文/越南语状态下 North-Sun 产品网格标题也允许换行 */
html[lang="en"] .pg-body h3,
html[lang="vi"] .pg-body h3{white-space:normal;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
/* 产品手风琴响应式 */
@media (max-width:1024px){
.pa-item{height:420px}
.pa-title{font-size:18px}
}
@media (max-width:768px){
.product-accordion{gap:10px;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:8px}
.pa-item{flex:0 0 260px;height:360px;scroll-snap-align:start}
.pa-item.on{flex:0 0 260px}
.pa-info{transform:translateY(0)}
.pa-title{transform:scale(1);font-size:17px;white-space:normal}
.pa-desc{opacity:1;-webkit-line-clamp:2}
.pa-more{opacity:1;transform:translateY(0)}
}
@media (max-width:480px){
.pa-item{flex:0 0 220px;height:320px}
.pa-info{padding:18px 16px}
.pa-title{font-size:16px}
.pa-desc{font-size:13px}
}
/* ===== North-Sun 风格产品网格 ===== */
.pg-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.pg-card{display:flex;flex-direction:column;text-decoration:none;color:var(--text);background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease}
.pg-card:hover{transform:translateY(-8px);box-shadow:0 18px 40px rgba(0,0,0,.12);border-color:var(--primary)}
.pg-media{position:relative;width:100%;aspect-ratio:4/3;background:var(--soft);overflow:hidden}
.pg-img{position:absolute;inset:0;background-size:cover;background-position:center;transition:transform .5s ease}
.pg-card:hover .pg-img{transform:scale(1.08)}
.pg-placeholder{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#0b5cad 0%,#08457f 100%)}
.pg-icon{font-size:48px;line-height:1}
.pg-body{padding:22px 20px 24px;flex:1;display:flex;flex-direction:column}
.pg-body h3{font-size:18px;font-weight:800;margin-bottom:10px;color:var(--text)}
.pg-body p{font-size:14px;line-height:1.7;color:var(--muted);margin-bottom:14px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;flex:1}
.pg-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--primary);transition:color .25s}
.pg-card:hover .pg-more{color:var(--accent)}
.pg-more::after{content:'→';transition:transform .25s ease;display:inline-block}
.pg-card:hover .pg-more::after{transform:translateX(4px)}
@media (max-width:1024px){.pg-grid{grid-template-columns:repeat(2,1fr);gap:22px}}
@media (max-width:560px){.pg-grid{grid-template-columns:1fr;gap:18px}}
/* 产品中心（plan B）：5 个产品整体居中对称，第二排自然居中，不影响紧固件网格 */
.pg-grid--products{display:flex;flex-wrap:wrap;justify-content:center;gap:28px}
.pg-grid--products .pg-card{flex:1 1 300px;max-width:360px}
/* ===== 产品系列（north-sun 风格：蓝底 + 3×2 长方形板块 + 悬停切换） ===== */
.home-section.fastener-section{
position:relative;overflow:hidden;color:#fff;
background:linear-gradient(135deg,#0c4e8f 0%,#0b5cad 50%,#08457f 100%);
padding:84px 0 92px;
}
.home-section.fastener-section::after{ /* 轻量工业点阵/工厂剪影底纹 */
content:"";position:absolute;inset:0;opacity:.10;pointer-events:none;
background:url('data:image/svg+xml;utf8,');
background-size:cover;background-position:center;
}
.home-section.fastener-section .container{position:relative;z-index:1}
.home-section.fastener-section .section-head{margin-bottom:46px}
.home-section.fastener-section .section-head h2{font-size:38px;font-weight:800;color:#fff}
.home-section.fastener-section .section-head h2::after{display:none}
.home-section.fastener-section .eyebrow{color:rgba(255,255,255,.78)}
.home-section.fastener-section .lead{color:rgba(255,255,255,.86);margin-top:12px;font-size:16px}
.fastener-stage{display:flex;gap:42px;align-items:stretch}
.fastener-grid-wrap{
flex:1;background:rgba(10,31,56,.55);border:1px solid rgba(255,255,255,.18);
border-radius:18px;overflow:hidden;box-shadow:0 20px 50px rgba(0,0,0,.18);
}
.fastener-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(2,1fr);height:100%;min-height:380px}
.fc-card{
position:relative;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:8px;
padding:24px;text-decoration:none;color:#fff;text-align:center;cursor:pointer;
background:rgba(255,255,255,.04);border-right:1px solid rgba(255,255,255,.14);border-bottom:1px solid rgba(255,255,255,.14);
transition:background .18s ease,transform .18s ease;
}
.fc-card:nth-child(3n){border-right:none}
.fc-card:nth-child(n+4){border-bottom:none}
.fc-card:hover{background:rgba(255,255,255,.12)}
.fc-card.active{background:var(--accent)}
.fc-card.active::before{content:"";position:absolute;left:0;top:14%;height:72%;width:5px;border-radius:3px;background:#fff;z-index:2}
.fc-card.active .fc-en{color:rgba(255,255,255,.9)}
.fc-card.fc-card--img{background-size:cover;background-position:center}
.fc-card.fc-card--img::before{content:"";position:absolute;inset:0;background:linear-gradient(rgba(8,50,95,.72),rgba(8,50,95,.78));z-index:0;transition:background .18s ease}
.fc-card.fc-card--img:hover::before{background:linear-gradient(rgba(8,50,95,.62),rgba(8,50,95,.68))}
.fc-card.fc-card--img.active::before{background:linear-gradient(rgba(255,140,26,.88),rgba(255,120,10,.92))}
.fc-card.fc-card--img span{position:relative;z-index:1}
.fc-name{font-size:20px;font-weight:700;color:#fff;transition:.3s}
.fc-en{font-size:13px;letter-spacing:1px;color:rgba(255,255,255,.65);text-transform:uppercase;transition:.3s}
.fc-card:hover .fc-name,.fc-card:hover .fc-en{opacity:0}
.fastener-detail{flex:1;display:flex;flex-direction:column;justify-content:center;align-items:flex-start;padding:30px 10px 30px 30px}
.fd-inner{max-width:460px;transition:opacity .2s ease,transform .2s ease}
.fd-inner.fd-fade-out{opacity:0;transform:translateX(12px)}
.fd-index{display:inline-block;font-size:14px;font-weight:700;letter-spacing:2px;color:rgba(255,255,255,.7);margin-bottom:18px}
.fd-name{font-size:32px;font-weight:800;color:#fff;line-height:1.2;margin-bottom:10px}
.fd-en{font-size:20px;font-weight:700;color:#fff;letter-spacing:1.5px;text-transform:uppercase;margin-bottom:22px}
.fd-desc{font-size:15.5px;color:#dbe7f3;line-height:1.95;margin-bottom:34px}
.fd-more{display:inline-flex;align-items:center;gap:8px;padding:13px 30px;border-radius:50px;
background:#fff;color:var(--primary);font-weight:700;font-size:15px;text-decoration:none;transition:.25s}
.fd-more:hover{background:var(--accent);color:#fff;transform:translateX(4px)}
.fd-more::after{content:">>"}
@media (max-width:900px){
.fastener-stage{flex-direction:column}
.fastener-grid{min-height:340px}
.fastener-detail{padding:36px 0 0;align-items:center;text-align:center}
.fd-inner{text-align:left}
}
@media (max-width:560px){
.fastener-grid{grid-template-columns:repeat(2,1fr);grid-template-rows:repeat(3,1fr);min-height:auto}
.fc-card:nth-child(3n){border-right:1px solid rgba(255,255,255,.14)}
.fc-card:nth-child(2n){border-right:none}
.fc-card:nth-child(n+4){border-bottom:1px solid rgba(255,255,255,.14)}
.fc-card:nth-child(n+5){border-bottom:none}
.fd-name{font-size:26px}
.fd-en{font-size:17px}
.fd-desc{font-size:14.5px}
}
/* ===== 紧固件单页（alltin 式）：左侧大类菜单 + 右侧产品网格 ===== */
.fc-layout{display:flex;gap:36px;align-items:flex-start;margin-top:8px}
.fc-menu{width:280px;flex:none;background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;position:sticky;top:96px}
.fc-menu-item{display:flex;flex-direction:column;gap:4px;padding:18px 22px;text-decoration:none;color:var(--text);border-bottom:1px solid var(--border);border-left:4px solid transparent;transition:background .2s ease,color .2s ease,border-color .2s ease}
.fc-menu-item:last-child{border-bottom:none}
.fc-menu-item:hover{background:var(--soft)}
.fc-menu-item.active{background:linear-gradient(135deg,#0c4e8f,#0b5cad);color:#fff;border-left-color:var(--accent)}
.fc-menu-item.active .fc-mi-en{color:rgba(255,255,255,.82)}
.fc-mi-name{font-size:17px;font-weight:700;line-height:1.3}
.fc-mi-en{font-size:12px;letter-spacing:1px;text-transform:uppercase;color:var(--muted);transition:color .2s ease}
.fc-content{flex:1;min-width:0}
.fc-content-head{margin-bottom:22px}
.fc-content-head h2{font-size:26px;font-weight:800;color:var(--text);position:relative;padding-left:14px}
.fc-content-head h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:5px;border-radius:3px;background:var(--primary)}
.fc-content-head p{margin-top:10px;font-size:15px;line-height:1.8;color:var(--muted);max-width:780px}
.fc-grid .pg-grid{padding-top:4px}
.fc-empty{padding:48px 20px;text-align:center;color:var(--muted);background:#fff;border:1px dashed var(--border);border-radius:var(--radius)}
@media (max-width:900px){
.fc-layout{flex-direction:column;gap:22px}
.fc-menu{width:100%;position:static;display:flex;overflow-x:auto}
.fc-menu-item{flex:1 0 auto;min-width:150px;border-bottom:none;border-right:1px solid var(--border);border-left:4px solid transparent}
.fc-menu-item:last-child{border-right:none}
.fc-content-head h2{font-size:22px}
}
@media (max-width:560px){
.fc-menu-item{min-width:124px;padding:14px 16px}
.fc-mi-name{font-size:15px}
}