/* =========================================================
   大秦集团 官网 · 全局样式
   配色：深蓝 #12477E（主） / 科技橙 #FF7A1A（强调） / 墨黑
   品牌LOGO 保留红色作为点缀
   ========================================================= */
:root{
  --navy:#0B2740;
  --blue:#12477E;
  --blue-2:#1A5C9E;
  --blue-light:#2E78C0;
  --blue-soft:#eaf2fb;
  --orange:#FF7A1A;
  --orange-deep:#E8650A;
  --orange-soft:#fff2e6;
  --ink:#13202e;
  --ink-2:#37485a;
  --gray:#64748b;
  --line:#e5ebf2;
  --bg:#ffffff;
  --bg-soft:#f3f7fb;
  --bg-dark:#0B2740;
  --radius:14px;
  --shadow:0 18px 50px -18px rgba(11,39,64,.28);
  --shadow-sm:0 8px 24px -12px rgba(11,39,64,.20);
  --maxw:1240px;
  --serif:'Noto Serif SC','Source Han Serif SC','Songti SC',serif;
  --sans:'Noto Sans SC','PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box}
/* 横向一律不许溢出：任何元素（含未揭示的滑入动效）都不该把文档撑宽，
   否则手机上双指一缩就会缩到文档宽度、两侧露白且不回弹。clip 不生成滚动容器，优先用 */
html{scroll-behavior:smooth;overflow-x:hidden}
@supports (overflow-x:clip){html{overflow-x:clip}}
body{
  font-family:var(--sans);color:var(--ink);background:var(--bg);
  line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}
section{position:relative}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}

/* ---------- 通用标题 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:14.5px;letter-spacing:3px;font-weight:700;color:var(--orange);
  text-transform:uppercase;margin-bottom:16px;
}
.eyebrow::before{content:"";width:28px;height:2px;background:var(--orange)}
.sec-title{font-family:var(--serif);font-size:clamp(30px,4vw,46px);font-weight:800;line-height:1.2;letter-spacing:1px}
.sec-title .accent{color:var(--blue)}
.sec-sub{color:var(--gray);margin-top:14px;max-width:660px;font-size:17.5px}
.sec-head{margin-bottom:54px}
.sec-head.center{text-align:center}
.sec-head.center .sec-sub{margin-left:auto;margin-right:auto}
/* 不可断行片段：中文可在任意字之间折行，用它把「数据」「名称」等语义整块钉在一起，
   换行只发生在片段之间，不会出现只剩一个字掉到下一行 */
.nb{white-space:nowrap}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;padding:15px 30px;border-radius:50px;font-weight:700;font-size:16.5px;transition:.3s;cursor:pointer;border:2px solid transparent}
.btn .arr{transition:transform .3s}
.btn:hover .arr{transform:translateX(5px)}
.btn-primary{background:var(--orange);color:#fff;box-shadow:0 12px 26px -10px rgba(255,122,26,.6)}
.btn-primary:hover{background:var(--orange-deep);transform:translateY(-2px)}
.btn-ghost{border-color:rgba(255,255,255,.55);color:#fff}
.btn-ghost:hover{background:#fff;color:var(--blue);border-color:#fff}
.btn-blue{background:var(--blue);color:#fff}
.btn-blue:hover{background:var(--blue-2);transform:translateY(-2px)}
.btn-outline{border-color:var(--line);color:var(--blue);font-size:15.5px;padding:11px 22px}
.btn-outline:hover{border-color:var(--blue);background:var(--blue-soft)}

/* =========================================================
   顶部信息条 + 导航
   ========================================================= */
.topbar{background:var(--navy);color:rgba(255,255,255,.78);font-size:14.5px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar .tb-left span{margin-right:22px}
.topbar .tb-right{display:flex;gap:18px;align-items:center}
.topbar a:hover{color:#fff}
.topbar b{color:var(--orange);font-weight:700}

/* 过渡只作用于需要动画的属性；right 不参与，避免滚动条补偿时被动画成"滑移" */
.header{position:fixed;top:0;left:0;right:0;z-index:100;transition:top .35s,background .35s,box-shadow .35s}
.nav{display:flex;align-items:center;justify-content:space-between;height:78px}
.nav-logo img{height:46px;width:auto}
.nav-menu{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-menu a{position:relative;padding:10px 15px;font-weight:600;font-size:17px;color:#fff;transition:.25s;border-radius:8px}
.nav-menu a::after{content:"";position:absolute;left:15px;right:15px;bottom:4px;height:2px;background:var(--orange);transform:scaleX(0);transform-origin:left;transition:transform .28s}
.nav-menu a:hover::after{transform:scaleX(1)}
.nav-cta{background:var(--orange);color:#fff !important;padding:11px 22px;border-radius:50px;font-weight:700;box-shadow:0 10px 22px -10px rgba(255,122,26,.7)}
.nav-cta::after{display:none !important}
.nav-cta:hover{background:var(--orange-deep)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:26px;height:2.5px;background:#fff;transition:.3s;border-radius:2px}
.nav-side{display:flex;align-items:center;gap:14px;margin-left:20px}
/* 语言切换：地球图标 + 当前语种，点击展开下拉 */
.lang-switch{position:relative;padding-left:18px;border-left:1px solid rgba(255,255,255,.3)}
.lang-trigger{display:flex;align-items:center;gap:7px;cursor:pointer;background:none;border:0;
  border-radius:8px;padding:7px 10px;color:rgba(255,255,255,.88);font-weight:600;font-size:15px;
  line-height:1;transition:.25s;font-family:var(--sans)}
.lang-trigger:hover{color:#fff;background:rgba(255,255,255,.12)}
.lang-globe{width:17px;height:17px;stroke:currentColor;fill:none;stroke-width:1.6;flex:0 0 auto}
.lang-caret{width:13px;height:13px;stroke:currentColor;fill:none;stroke-width:2.2;
  transition:transform .28s;flex:0 0 auto;opacity:.8}
.lang-switch.open .lang-caret{transform:rotate(180deg)}
/* 下拉面板 */
.lang-menu{position:absolute;top:calc(100% + 10px);right:0;min-width:148px;z-index:120;
  background:#fff;border-radius:12px;padding:6px;box-shadow:0 18px 44px -14px rgba(11,39,64,.42);
  border:1px solid var(--line);opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .22s,transform .22s,visibility .22s}
.lang-switch.open .lang-menu{opacity:1;visibility:visible;transform:none}
.lang-opt{display:block;width:100%;text-align:left;cursor:pointer;background:none;border:0;
  border-radius:8px;padding:10px 12px;color:var(--ink-2);font-weight:600;font-size:15px;
  line-height:1.2;transition:.2s;font-family:var(--sans)}
.lang-opt:hover{background:var(--bg-soft);color:var(--ink)}
.lang-opt.on{color:var(--orange);background:var(--orange-soft)}
.lang-opt.on::after{content:"✓";float:right;font-weight:700}
/* 白底导航状态 */
.header.scrolled .lang-switch{border-left-color:var(--line)}
.header.scrolled .lang-trigger{color:var(--ink)}
.header.scrolled .lang-trigger:hover{background:var(--bg-soft)}
/* 顶部条随页面滚动隐藏，header 上移 */
.header{top:38px}
.header.scrolled{top:0;background:rgba(255,255,255,.95);backdrop-filter:blur(12px);box-shadow:0 6px 24px -16px rgba(0,0,0,.4)}
.header.scrolled .nav{height:68px}
.header.scrolled .nav-menu a{color:var(--ink)}
.header.scrolled .nav-cta{color:#fff !important}
.header.scrolled .nav-toggle span{background:var(--ink)}

/* =========================================================
   首屏 HERO
   ========================================================= */
/* 首屏精确占满一屏：扣除顶部 38px 信息条，打开网站时首屏底边与窗口底边对齐 */
.hero{min-height:calc(100vh - 38px);min-height:calc(100svh - 38px);
  display:flex;flex-direction:column;color:#fff;position:relative;overflow:hidden;
  background:linear-gradient(120deg,#081c30 0%,#0d3056 42%,#12477E 74%,#1d63a8 130%);}
.hero::before{content:"";position:absolute;inset:0;
  background:radial-gradient(circle at 82% 18%,rgba(255,122,26,.28),transparent 42%),
            radial-gradient(circle at 10% 88%,rgba(46,120,192,.5),transparent 52%);}
.hero-deco{position:absolute;inset:0;opacity:.14;pointer-events:none}
.hero-deco span{position:absolute;border:2px solid #fff;border-radius:14px}
.hero-deco span:nth-child(1){width:280px;height:380px;right:6%;top:14%;transform:rotate(12deg)}
.hero-deco span:nth-child(2){width:180px;height:180px;right:22%;bottom:10%;transform:rotate(-8deg)}
.hero-deco span:nth-child(3){width:120px;height:160px;left:8%;top:24%;transform:rotate(-14deg)}
.hero-inner{position:relative;z-index:2;flex:1 0 auto;display:flex;flex-direction:column;justify-content:center;width:100%;padding-top:120px;padding-bottom:46px;max-width:900px}
.hero h1{font-family:var(--serif);font-weight:800;font-size:clamp(40px,6.2vw,78px);line-height:1.1;letter-spacing:2px}
/* 「绿动」生机绿：正绿方向，明快而不刺眼，在深蓝背景上清晰醒目 */
.hero h1 .hl{color:#5FD08A;display:inline-block}
.hero p.lead{margin-top:26px;font-size:clamp(17.5px,2vw,23px);max-width:640px;color:rgba(255,255,255,.9);font-weight:300;letter-spacing:.5px}
.hero-tags{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.hero-tags a{padding:9px 20px;border:1px solid rgba(255,255,255,.32);border-radius:50px;font-size:16px;font-weight:600;color:#fff;backdrop-filter:blur(4px);background:rgba(255,255,255,.07);transition:background-color .25s,border-color .25s,transform .25s,box-shadow .25s}
.hero-tags a:hover,.hero-tags a:focus-visible{background:rgba(255,122,26,.22);border-color:rgba(255,168,102,.9);transform:translateY(-2px);box-shadow:0 8px 22px -14px rgba(255,122,26,.9)}
.hero-tags a:active{transform:translateY(0) scale(.98)}
.hero-actions{display:flex;flex-wrap:wrap;gap:16px;margin-top:40px}
.hero-stats{position:relative;z-index:3;flex:0 0 auto;border-top:1px solid rgba(255,255,255,.16);background:rgba(0,0,0,.2)}
.hero-stats .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;padding-top:26px;padding-bottom:26px}
.hero-stats .stat{text-align:center}
.hero-stats .num{font-family:var(--serif);font-size:clamp(30px,3.6vw,42px);font-weight:800;color:#fff}
.hero-stats .num small{font-size:20px;margin-left:2px;color:var(--orange)}
.hero-stats .lbl{font-size:15px;color:rgba(255,255,255,.78);margin-top:4px}

/* =========================================================
   关于集团
   ========================================================= */
.about{padding:120px 0}
.about-grid{display:grid;grid-template-columns:1fr 1.3fr;gap:48px;align-items:center}
/* 左栏收窄后标题字号略降，保证「实业为本，匠造城市基石」单行显示；若极窄屏被迫换行则按词断开 */
.about-text .sec-title{font-size:clamp(28px,3.3vw,42px);text-wrap:balance}
.about-text p{color:var(--ink-2);font-size:18px;margin-top:18px}
.about-points{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:34px}
.about-points li{display:flex;gap:14px;align-items:flex-start;padding:18px;border:1px solid var(--line);border-radius:12px;transition:.3s}
.about-points li:hover{border-color:var(--blue);box-shadow:var(--shadow-sm);transform:translateY(-3px)}
.about-points .ic{flex:0 0 42px;height:42px;border-radius:10px;background:var(--blue-soft);color:var(--blue);display:grid;place-items:center;font-weight:800;font-size:22px}
.about-points h4{font-size:17.5px;margin-bottom:2px}
.about-points p{font-size:15px;color:var(--gray);margin:0}
.about-visual{position:relative}
.about-visual .photo{border-radius:20px;overflow:hidden;box-shadow:var(--shadow);position:relative}
/* 宽幅鸟瞰图：16:10 取景贴合扁长原图，铺满卡片；悬停轻微推近 */
.about-visual .photo img{width:100%;height:auto;aspect-ratio:16/10;object-fit:cover;object-position:center 40%;
  transition:transform .8s cubic-bezier(.2,.7,.2,1)}
.about-visual .photo:hover img{transform:scale(1.04)}
/* 底部渐变保证文字可读 + 四周内阴影轻微虚化边缘 */
.about-visual .photo::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 55%,rgba(11,39,64,.55));
  box-shadow:inset 0 0 46px 6px rgba(11,39,64,.30)}
.about-visual .ph-cap{position:absolute;left:26px;bottom:22px;z-index:2;color:#fff}
.about-visual .ph-cap b{font-family:var(--serif);font-size:22px;display:block}
.about-visual .ph-cap span{font-size:14.5px;color:rgba(255,255,255,.8)}
.about-visual .badge{position:absolute;right:-22px;top:40px;background:#fff;color:var(--ink);padding:18px 24px;border-radius:14px;box-shadow:var(--shadow);text-align:center}
.about-visual .badge b{font-family:var(--serif);color:var(--orange);font-size:32px;display:block;line-height:1}
.about-visual .badge span{font-size:14.5px;color:var(--gray)}

/* =========================================================
   核心业务（四大板块）
   ========================================================= */
.pillars{padding:120px 0;background:var(--bg-soft)}
.pillar-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
/* 业务卡片：对应实景照片为底（--img 由 HTML 传入），深蓝遮罩+四边虚化保证文字清晰 */
.pillar{display:block;background:var(--navy);border-radius:18px;padding:38px 30px;transition:.35s;position:relative;overflow:hidden;color:inherit}
.pillar::before{content:"";position:absolute;inset:0;background-image:var(--img);background-size:cover;background-position:center;
  transition:transform .8s cubic-bezier(.2,.7,.2,1)}
.pillar::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(8,28,48,.86) 0%,rgba(8,28,48,.62) 45%,rgba(8,28,48,.88) 100%);
  box-shadow:inset 0 0 46px 8px rgba(8,28,48,.55);transition:background .35s}
.pillar>*{position:relative;z-index:2}
.pillar:hover{box-shadow:var(--shadow);transform:translateY(-8px)}
.pillar:hover::before{transform:scale(1.08)}
.pillar .pic{width:64px;height:64px;border-radius:16px;background:linear-gradient(135deg,var(--blue),var(--blue-light));display:grid;place-items:center;margin-bottom:22px;transition:.35s;box-shadow:0 8px 24px -8px rgba(0,0,0,.5)}
.pillar:hover .pic{background:linear-gradient(135deg,var(--orange),var(--orange-deep))}
.pillar .pic svg{width:32px;height:32px;stroke:#fff;fill:none;stroke-width:1.7;stroke-linejoin:round;stroke-linecap:round}
.pillar .pnum{position:absolute;top:24px;right:26px;font-family:var(--serif);font-size:40px;font-weight:800;color:rgba(255,255,255,.28)}
.pillar h3{font-size:23px;margin-bottom:10px;color:#fff;text-shadow:0 2px 12px rgba(0,0,0,.4)}
.pillar p{font-size:16px;color:rgba(255,255,255,.86);text-shadow:0 1px 8px rgba(0,0,0,.3)}
.pillar .tags{margin-top:16px;display:flex;flex-wrap:wrap;gap:7px}
.pillar .tags span{font-size:14px;padding:5px 12px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);
  border-radius:50px;color:#fff;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px)}
.pillar-more{display:flex;align-items:center;justify-content:space-between;margin-top:22px;padding-top:17px;border-top:1px solid rgba(255,255,255,.2);color:#fff;font-size:15px;font-weight:700}
.pillar-more b{font-size:20px;line-height:1;color:var(--orange);font-weight:600;transition:transform .25s}
.pillar:hover .pillar-more b,.pillar:focus-visible .pillar-more b{transform:translateX(4px)}
.pillar:focus-visible{outline:3px solid var(--orange);outline-offset:4px;box-shadow:var(--shadow);transform:translateY(-5px)}
.pillar:active{transform:translateY(-2px) scale(.99)}

/* =========================================================
   产品中心
   ========================================================= */
/* 尾部留白比其他板块少 28px：本板块以「应用领域」深色卡收尾，卡片自带 77px 内边距
   已经贡献了一段空白，再加满 120px 会让文字到下一板块的距离比全站中位数多出一截 */
.products{padding:120px 0 92px}
/* 旗舰产品 */
.flagship{display:grid;grid-template-columns:1.05fr 1fr;gap:50px;align-items:center;margin-bottom:70px;background:var(--bg-soft);border-radius:24px;padding:48px;border:1px solid var(--line)}
.flagship-media{position:relative;border-radius:18px;overflow:hidden;box-shadow:var(--shadow)}
.flagship-media img{width:100%;height:420px;object-fit:cover}
.flagship-media .ribbon{position:absolute;left:18px;top:18px;background:var(--orange);color:#fff;font-size:14px;font-weight:700;padding:7px 16px;border-radius:50px;letter-spacing:1px}
.flagship-body .tag{font-size:14.5px;font-weight:700;color:var(--orange);letter-spacing:2px}
.flagship-body h3{font-family:var(--serif);font-size:32px;margin:10px 0 14px;line-height:1.3}
.flagship-body>p{color:var(--ink-2);font-size:17px;margin-bottom:22px}
.flagship-feats{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:26px}
.flagship-feats li{display:flex;gap:10px;font-size:15.5px;color:var(--ink-2)}
.flagship-feats .dot{flex:0 0 22px;height:22px;border-radius:50%;background:var(--blue-soft);color:var(--blue);display:grid;place-items:center;font-size:13px;font-weight:800}
.flagship-actions{display:flex;gap:14px;flex-wrap:wrap}

.prod-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.prod-card{border:1px solid var(--line);border-radius:16px;padding:30px 26px;transition:.35s;background:#fff;position:relative;overflow:hidden}
.prod-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.prod-ic{width:60px;height:60px;border-radius:14px;background:var(--blue-soft);display:grid;place-items:center;margin-bottom:20px;transition:.35s}
.prod-ic svg{width:30px;height:30px;stroke:var(--blue);fill:none;stroke-width:1.8}
.prod-card:hover .prod-ic{background:var(--orange)}
.prod-card:hover .prod-ic svg{stroke:#fff}
.prod-card h4{font-size:20px;margin-bottom:8px}
.prod-card p{font-size:15.5px;color:var(--gray)}
.prod-card .dl{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-size:14.5px;font-weight:700;color:var(--orange)}
.prod-card .dl svg{width:15px;height:15px;stroke:var(--orange);fill:none;stroke-width:2}

/* 应用领域 */
.fields{margin-top:64px;background:var(--navy);border-radius:20px;padding:48px;color:#fff}
/* 头部与全站其他板块一样竖排居中；原先标题在左、副标题被推到最右，宽屏下两者相距过远，副标题像掉队了 */
.fields-head{display:flex;flex-direction:column;align-items:center;text-align:center;gap:10px;margin-bottom:38px}
.fields-head h3{font-family:var(--serif);font-size:28px}
.fields-head p{color:rgba(255,255,255,.6);font-size:16.5px;max-width:560px}
.fields-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.field-item{padding:26px 22px;border:1px solid rgba(255,255,255,.14);border-radius:14px;
  background:rgba(255,255,255,.04);transition:background-color .3s,border-color .3s,transform .3s}
/* 图标走 CSS 遮罩而非写进 HTML：i18n 是整块替换 .fields-grid 的 innerHTML，
   图标若在标签里，就得在中英日三处各维护一份，切语言时极易漏。用 mask 还能直接吃主题色。 */
.field-item::before{content:"";display:block;width:36px;height:36px;margin-bottom:16px;background:var(--orange);
  -webkit-mask:var(--ic) center/contain no-repeat;mask:var(--ic) center/contain no-repeat;transition:background-color .3s}
.field-item:nth-child(1){--ic:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='2.5' y='7' width='14' height='10' rx='2.5'/%3E%3Cpath d='M19.5 10v4'/%3E%3Cpath d='M10 9.4 7.6 12.6h3.2L8.6 15.8'/%3E%3C/svg%3E")}
.field-item:nth-child(2){--ic:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='5' y='3' width='14' height='14' rx='3.5'/%3E%3Cpath d='M5 10.5h14'/%3E%3Ccircle cx='9' cy='13.6' r='1'/%3E%3Ccircle cx='15' cy='13.6' r='1'/%3E%3Cpath d='M8.5 17 6.5 21M15.5 17l2 4'/%3E%3C/svg%3E")}
.field-item:nth-child(3){--ic:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 21V11.5a8 8 0 0 1 16 0V21'/%3E%3Cpath d='M8 12h8M8 16h8'/%3E%3C/svg%3E")}
.field-item:nth-child(4){--ic:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M8 3 4 21M16 3l4 18'/%3E%3Cpath d='M12 4v3M12 10.5v3M12 17v3'/%3E%3C/svg%3E")}
.field-item:hover{background:rgba(255,122,26,.16);border-color:var(--orange);transform:translateY(-3px)}
.field-item:hover::before{background:#fff}
.field-item b{font-size:18.5px;display:block;margin-bottom:6px}
.field-item span{font-size:15px;color:rgba(255,255,255,.62);line-height:1.6}

/* =========================================================
   合作伙伴：低干扰品牌矩阵，承接应用领域并过渡至储能板块
   ========================================================= */
.partners{position:relative;padding:104px 0 112px;overflow:hidden;scroll-margin-top:68px;background:linear-gradient(180deg,#f6fafd 0%,#f2f7fc 62%,#eaf2f8 100%)}
.partners::before{content:"";position:absolute;width:420px;height:420px;right:-180px;top:-230px;border-radius:50%;background:radial-gradient(circle,rgba(18,71,126,.1),transparent 68%);pointer-events:none}
.partners-head{text-align:center;max-width:760px;margin:0 auto 46px}
.partners-kicker{display:inline-flex;align-items:center;gap:14px;margin-bottom:20px;color:var(--orange);font-size:15px;font-weight:800;letter-spacing:3px}
.partners-kicker i{display:block;width:42px;height:2px;background:var(--orange)}
.partners-head .sec-title{font-size:clamp(30px,4vw,46px)}
.partners-lead{margin:16px auto 0;color:var(--gray);font-size:17px;line-height:1.8;max-width:660px}
.partner-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:0;background:#fff;border-radius:20px;overflow:hidden;box-shadow:inset 0 0 0 1px rgba(18,71,126,.14),0 24px 70px -48px rgba(10,43,76,.5)}
.partner-logo{height:108px;display:grid;place-items:center;padding:18px 12px;background:rgba(255,255,255,.94);box-shadow:inset -1px -1px 0 rgba(18,71,126,.12);transition:background-color .3s ease,transform .3s ease}
.partner-logo img{--logo-scale:1;display:block;width:min(100%,150px);height:72px;object-fit:contain;filter:grayscale(1);opacity:.72;transform:scale(var(--logo-scale));transition:filter .3s ease,opacity .3s ease,transform .3s ease}
.partner-logo img:is([src$="citec.png"],[src$="dec.png"],[src$="yitai.png"]){--logo-scale:1.16}
.partner-logo img[src$="china-datang.png"]{--logo-scale:1.3}
/* 中国节能是「点阵 + 中文名 + 英文全称」三段式，占位天然比同排大，缩放要比邻居保守 */
.partner-logo img[src$="cecep-group.png"]{--logo-scale:1.08}
.partner-logo img:is([src$="china-huaneng.png"],[src$="china-railway.png"],[src$="ge.png"],[src$="huawei.png"]){--logo-scale:1.27}
.partner-logo img:is([src$="chn-energy.png"],[src$="china-huadian.png"]){--logo-scale:1.35}
.partner-logo img[src$="peoples-electric.png"]{--logo-scale:1.45}
.partner-logo img[src$="delixi.png"]{--logo-scale:1.62}
.partner-logo img[src$="cscec.svg"]{--logo-scale:1.42}
.partner-logo img:is([src$="yitai.png"],[src$="legrand.png"]){opacity:.65}
.partner-logo img[src$="legrand.png"]{--logo-scale:1.12}
.partner-logo img[src*="inner-mongolia-energy.png"]{--logo-scale:1.18;opacity:.78}
.partner-logo:hover{background:#fff;transform:translateY(-2px)}
.partner-logo:hover img{filter:none;opacity:1;transform:scale(var(--logo-scale))}
@media (prefers-reduced-motion:reduce){.partner-logo,.partner-logo img{transition:none}.partner-logo:hover,.partner-logo:hover img{transform:none}}

/* 窄屏折叠开关（客户案例 / 合作伙伴共用）：桌面完整铺开，无需此按钮 */
.grid-more{display:none}
.grid-more .gm-off{display:none}
.grid-more[aria-expanded=true] .gm-on{display:none}
.grid-more[aria-expanded=true] .gm-off{display:inline}

/* =========================================================
   科技储能 / 宣传视频
   ========================================================= */
.storage{padding:120px 0;background:linear-gradient(120deg,#081c30,#103056 60%,#12477E);color:#fff;overflow:hidden}
.storage-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:56px;align-items:center}
.storage-body .eyebrow{color:var(--orange)}
.storage-body h2{font-family:var(--serif);font-size:clamp(30px,4vw,44px);font-weight:800;line-height:1.2}
.storage-body p{color:rgba(255,255,255,.82);margin-top:18px;font-size:17.5px;max-width:520px}
.storage-feats{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:30px}
.storage-feats li{display:flex;gap:12px;align-items:flex-start}
.storage-feats .ic{flex:0 0 40px;height:40px;border-radius:10px;background:rgba(255,122,26,.18);color:var(--orange);display:grid;place-items:center;font-weight:800}
.storage-feats b{font-size:16.5px;display:block}
.storage-feats span{font-size:14.5px;color:rgba(255,255,255,.62)}
.video-card{position:relative;border-radius:20px;overflow:hidden;box-shadow:var(--shadow);background:#000}
.video-card video{width:100%;display:block;aspect-ratio:16/9;max-height:560px;object-fit:cover;background:#06121f}
.video-card .vlabel{position:absolute;left:18px;top:18px;z-index:2;background:rgba(0,0,0,.45);backdrop-filter:blur(6px);color:#fff;font-size:14px;padding:7px 14px;border-radius:50px;display:flex;align-items:center;gap:7px}
.video-card .vlabel i{width:8px;height:8px;border-radius:50%;background:var(--orange);display:inline-block}
/* DQNE 子品牌标识 */
.subbrand{display:inline-flex;align-items:center;gap:12px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);border-radius:50px;padding:8px 18px 8px 10px;margin-bottom:22px}
.subbrand img{height:30px;background:#fff;border-radius:8px;padding:4px 8px}
.subbrand span{font-size:14.5px;color:rgba(255,255,255,.82);letter-spacing:.5px}
/* 呼和浩特项目特色横幅 */
.proj-banner{margin-top:70px;border-radius:24px;overflow:hidden;position:relative;min-height:420px;display:flex;align-items:flex-end;background-size:cover;background-position:center;box-shadow:var(--shadow)}
.proj-banner::before{content:"";position:absolute;inset:0;background:linear-gradient(110deg,rgba(8,20,32,.88) 0%,rgba(8,28,48,.6) 55%,rgba(8,28,48,.15) 100%)}
.proj-banner .pb-inner{position:relative;z-index:2;padding:48px;max-width:760px}
.proj-banner .pb-tag{display:inline-block;background:var(--orange);color:#fff;font-size:14px;font-weight:700;letter-spacing:1px;padding:6px 16px;border-radius:50px;margin-bottom:16px}
.proj-banner h3{font-family:var(--serif);font-size:clamp(26px,3.2vw,38px);font-weight:800;line-height:1.25;color:#fff}
.proj-banner p{color:rgba(255,255,255,.82);margin-top:12px;font-size:17px;max-width:560px}
/* 项目数据：2×2 等宽等高排布 */
.proj-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:28px;max-width:520px}
.proj-stats .ps{background:rgba(255,255,255,.1);backdrop-filter:blur(6px);border:1px solid rgba(255,255,255,.16);border-radius:14px;padding:16px 20px;text-align:center;
  display:flex;flex-direction:column;justify-content:center;min-height:94px}
.proj-stats .ps b{display:block;font-family:var(--serif);font-size:28px;color:#fff;line-height:1.1}
.proj-stats .ps b em{color:var(--orange);font-style:normal;font-size:20px;margin-left:1px}
.proj-stats .ps span{font-size:14px;color:rgba(255,255,255,.7)}

/* =========================================================
   客户案例
   ========================================================= */
.cases{padding:120px 0;background:var(--bg-soft)}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.case-card{border-radius:18px;overflow:hidden;position:relative;min-height:300px;display:flex;flex-direction:column;justify-content:flex-end;padding:30px;color:#fff;box-shadow:var(--shadow-sm);transition:.4s;background-size:cover;background-position:center}
.case-card.tall{min-height:380px}
.case-watermark{position:absolute;right:-10px;bottom:-10px;width:140px;height:140px;z-index:1;opacity:.12}
.case-watermark svg{width:100%;height:100%;stroke:#fff;fill:none;stroke-width:1.2}
.case-card::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,20,32,.1) 0%,rgba(8,20,32,.82) 100%);z-index:1;transition:.4s}
.case-card:hover{transform:translateY(-6px)}
.case-card:hover::before{background:linear-gradient(180deg,rgba(18,71,126,.28) 0%,rgba(8,20,32,.85) 100%)}
.case-card>*{position:relative;z-index:2}
.case-card .cat{font-size:14px;letter-spacing:2px;color:var(--orange);font-weight:700;margin-bottom:10px}
.case-card h4{font-family:var(--serif);font-size:25px;line-height:1.3}
.case-card p{font-size:15.5px;color:rgba(255,255,255,.78);margin-top:8px}
/* 可点击提示：悬停时右下角浮出「查看详情」 */
.case-card{cursor:pointer}
.case-card .case-detail{display:none}
.case-card::after{content:"查看详情 →";position:absolute;right:30px;bottom:30px;z-index:2;
  font-size:14px;font-weight:600;color:var(--orange);opacity:0;transform:translateX(-6px);transition:.35s}
.case-card:hover::after{opacity:1;transform:none}
html[lang=en] .case-card::after{content:"View details →"}
html[lang=ja] .case-card::after{content:"詳細を見る →"}
.case-card.case-muted{opacity:.42;filter:saturate(.55)}
.case-grid.case-guided .case-card{transition:opacity .35s,filter .35s}

/* ============ 案例详情弹窗 ============ */
.case-modal{position:fixed;inset:0;z-index:200;display:grid;place-items:center;padding:24px}
.case-modal[hidden]{display:none}
.cm-backdrop{position:absolute;inset:0;background:rgba(6,16,28,.72);backdrop-filter:blur(6px);
  animation:cmFade .3s ease}
.cm-panel{position:relative;z-index:2;width:min(980px,100%);max-height:88vh;overflow:auto;
  background:#fff;border-radius:20px;box-shadow:0 40px 100px -30px rgba(0,0,0,.6);
  display:grid;grid-template-columns:0.92fr 1.08fr;animation:cmRise .38s cubic-bezier(.2,.7,.2,1)}
@keyframes cmFade{from{opacity:0}to{opacity:1}}
@keyframes cmRise{from{opacity:0;transform:translateY(24px) scale(.97)}to{opacity:1;transform:none}}
.cm-media{overflow:hidden}
.cm-media img{width:100%;height:100%;min-height:320px;object-fit:cover;display:block}
.cm-body{padding:44px 44px 40px;display:flex;flex-direction:column}
.cm-cat{font-size:13.5px;letter-spacing:2px;color:var(--orange);font-weight:700}
.cm-panel h3{font-family:var(--serif);font-size:25px;line-height:1.32;margin-top:10px;color:var(--ink)}
.cm-sub{font-size:14.5px;color:var(--gray);margin-top:8px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.cm-desc{font-size:15.5px;line-height:1.9;color:var(--ink-2);margin-top:18px;margin-bottom:34px}
.cm-desc p{margin-bottom:14px}
.cm-desc p:last-child{margin-bottom:0}
/* 新闻正文模式：无配图，单栏通读 */
.cm-panel.cm-article{grid-template-columns:1fr;width:min(720px,100%)}
.cm-article .cm-media{display:none}
.cm-article .cm-body{padding:46px 48px 42px}
/* 按钮：比正文按钮更收敛，并与上方文字保持固定间距 */
.cm-cta{margin-top:auto;align-self:flex-start;padding:11px 24px;font-size:15px;border-width:0}
.cm-close{position:absolute;right:14px;top:14px;z-index:3;width:38px;height:38px;border:0;border-radius:50%;
  background:rgba(255,255,255,.9);color:var(--ink);font-size:24px;line-height:1;cursor:pointer;
  box-shadow:0 4px 14px -4px rgba(0,0,0,.4);transition:.25s}
.cm-close:hover{background:var(--orange);color:#fff;transform:rotate(90deg)}
/* 锁定滚动时用 --sbw 补偿滚动条宽度，避免页面左右横跳（固定定位元素需同步补偿） */
body.cm-open{overflow:hidden;padding-right:var(--sbw,0px)}
body.cm-open .header{right:var(--sbw,0px)}
body.cm-open .back-top{right:calc(26px + var(--sbw,0px))}
.cg1{background:linear-gradient(135deg,#1c3a5e,#3f6fa5)}
.cg2{background:linear-gradient(135deg,#0d3056,#1a5c9e)}
.cg3{background:linear-gradient(135deg,#1f4d3f,#3f8d6f)}
.cg4{background:linear-gradient(135deg,#4a3b1f,#b07d2f)}
.cg5{background:linear-gradient(135deg,#26303f,#54607a)}
.cg6{background:linear-gradient(135deg,#3a2a1f,#a8651a)}

/* 更多业绩一览 */
.more-recs{margin-top:44px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:38px 42px}
.mr-head{display:flex;justify-content:space-between;align-items:baseline;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.mr-head h3{font-family:var(--serif);font-size:25px}
.mr-head p{font-size:15.5px;color:var(--gray)}
.mr-list{display:grid;grid-template-columns:1fr 1fr;gap:0 40px}
.mr-list li{display:flex;align-items:center;gap:12px;padding:13px 4px;border-bottom:1px dashed var(--line);transition:.25s}
.mr-list li:hover{background:var(--blue-soft);border-radius:8px;padding-left:10px}
.mr-list b{flex:1;font-size:16px;font-weight:600;color:var(--ink-2)}
.mr-tag{flex:0 0 auto;font-size:13px;font-weight:700;color:var(--blue);background:var(--blue-soft);padding:3px 12px;border-radius:50px;white-space:nowrap}
.mr-list em{flex:0 0 auto;font-style:normal;font-family:var(--serif);font-weight:700;font-size:15.5px;color:var(--orange)}
/* 业绩收尾：说明此处仅为节选，并引导至联系我们 */
.mr-foot{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:14px;
  margin-top:26px;padding-top:22px;border-top:1px solid var(--line)}
.mr-foot span{font-size:15px;color:var(--gray);max-width:640px;line-height:1.7}
.mr-more{flex:0 0 auto;display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:700;
  color:var(--blue);padding:10px 22px;border:1.5px solid var(--line);border-radius:50px;transition:.28s}
.mr-more:hover{background:var(--blue);border-color:var(--blue);color:#fff}
.mr-more:hover .arr{transform:translateX(3px)}
.mr-more .arr{transition:transform .28s}

/* =========================================================
   资质荣誉
   ========================================================= */
.qual{padding:120px 0}
.qual-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:10px}
.qual-item{display:flex;gap:16px;align-items:center;padding:24px;border:1px solid var(--line);border-radius:14px;transition:.3s}
.qual-item:hover{border-color:var(--blue);background:var(--blue-soft)}
.qual-item .seal{flex:0 0 52px;height:52px;border-radius:50%;border:2px solid var(--blue);color:var(--blue);display:grid;place-items:center;font-family:var(--serif);font-weight:800;font-size:20px}
.qual-item b{font-size:17.5px;display:block}
.qual-item span{font-size:14.5px;color:var(--gray)}
/* 通栏突出卡：最具分量的国家级资质单独占一行 */
.qual-feature{grid-column:1/-1;background:linear-gradient(100deg,var(--blue-soft),#fff 62%);border-color:var(--blue)}
.qual-feature .seal{border-color:var(--orange);color:var(--orange);background:#fff}
.qual-feature b{font-size:20px}
.certs{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:40px}
.certs span{padding:10px 22px;border:1px dashed var(--line);border-radius:50px;font-size:15.5px;color:var(--ink-2)}
.certs b{color:var(--orange)}

/* =========================================================
   新闻中心
   ========================================================= */
.news{padding:120px 0;background:var(--bg-soft)}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.news-card{background:#fff;border-radius:16px;overflow:hidden;border:1px solid var(--line);transition:.35s}
.news-card:hover{box-shadow:var(--shadow);transform:translateY(-6px)}
.news-thumb{height:170px;position:relative;display:grid;place-items:center}
.news-thumb .date{position:absolute;left:18px;top:18px;background:#fff;border-radius:10px;padding:8px 14px;text-align:center;box-shadow:var(--shadow-sm)}
.news-thumb .date b{font-family:var(--serif);font-size:26px;color:var(--blue);line-height:1;display:block}
.news-thumb .date span{font-size:13px;color:var(--gray)}
.news-body{padding:26px}
.news-body .cat{font-size:13px;color:var(--orange);font-weight:700;letter-spacing:1px}
.news-body h4{font-size:20px;margin:10px 0;line-height:1.5;transition:.25s}
.news-card:hover .news-body h4{color:var(--blue)}
.news-body p{font-size:15.5px;color:var(--gray)}
.news-more{display:inline-flex;align-items:center;gap:8px;margin-top:16px;color:var(--orange);font-weight:700;font-size:15.5px}

/* =========================================================
   联系我们
   ========================================================= */
.contact{padding:120px 0;background:var(--bg-dark);color:#fff}
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:60px}
.contact-info .sec-title{color:#fff}
.contact-info .sec-title .accent{color:var(--orange)}
.contact-info .sec-sub{color:rgba(255,255,255,.65)}
.ci-list{margin-top:40px;display:grid;gap:22px}
.ci-item{display:flex;gap:18px;align-items:flex-start}
.ci-item .ic{flex:0 0 48px;height:48px;border-radius:12px;background:rgba(255,122,26,.18);display:grid;place-items:center}
.ci-item .ic svg{width:22px;height:22px;stroke:var(--orange);fill:none;stroke-width:1.8}
.ci-item b{font-size:13px;letter-spacing:2px;color:rgba(255,255,255,.5);text-transform:uppercase}
.ci-item p{font-size:18.5px;margin-top:2px}
.ci-item p.big{font-size:26px;font-family:var(--serif);color:var(--orange)}
.form-card{background:#fff;border-radius:20px;padding:40px;color:var(--ink);box-shadow:var(--shadow)}
/* 金数据嵌入表单：窗口加高到内容完整显示(无内部滚动条)；
   --crop 为裁掉的表单自带大标题高度，标题露头/字段被切时只调这一个数 */
.form-embed-wrap{overflow:hidden;border-radius:12px;--crop:90px}
.form-embed{display:block;width:100%;height:calc(900px + var(--crop));margin-top:calc(-1*var(--crop));
  border:0;background:#fff}
.form-card .form-note{margin-top:14px;font-size:13.5px;color:var(--gray);text-align:center}
.form-card h3{font-family:var(--serif);font-size:26px;margin-bottom:6px}
.form-card .fc-sub{color:var(--gray);font-size:15.5px;margin-bottom:26px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{margin-bottom:16px}
.field label{font-size:14.5px;font-weight:600;color:var(--ink-2);display:block;margin-bottom:7px}
.field input,.field textarea{width:100%;padding:13px 15px;border:1.5px solid var(--line);border-radius:10px;font-size:16.5px;font-family:inherit;transition:.25s;background:var(--bg-soft)}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--blue);background:#fff;box-shadow:0 0 0 4px var(--blue-soft)}
.field textarea{resize:vertical;min-height:110px}
.form-card .btn-primary{width:100%;justify-content:center;margin-top:6px}
.form-note{font-size:14px;color:var(--gray);text-align:center;margin-top:14px}

/* =========================================================
   页脚
   ========================================================= */
.footer{background:#06141f;color:rgba(255,255,255,.7);padding:70px 0 0}
.foot-top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.1fr;gap:40px;padding-bottom:50px;border-bottom:1px solid rgba(255,255,255,.1)}
.foot-brand img{height:44px;margin-bottom:20px}
.foot-brand p{font-size:15.5px;max-width:320px;line-height:1.8}
.foot-col h5{color:#fff;font-size:16.5px;margin-bottom:18px;font-weight:700}
.foot-col a{display:block;font-size:15.5px;padding:6px 0;transition:.25s}
.foot-col a:hover{color:var(--orange);padding-left:5px}
.foot-col p{font-size:15.5px;padding:6px 0}
.foot-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:14px;padding:26px 0;font-size:14.5px;color:rgba(255,255,255,.5)}
.foot-bottom a:hover{color:#fff}
.back-top{position:fixed;right:26px;bottom:26px;z-index:90;width:50px;height:50px;border-radius:50%;background:var(--orange);color:#fff;display:grid;place-items:center;cursor:pointer;border:0;box-shadow:0 12px 26px -10px rgba(255,122,26,.7);opacity:0;transform:translateY(20px);transition:opacity .35s,transform .35s,background .35s;pointer-events:none}
.back-top.show{opacity:1;transform:translateY(0);pointer-events:auto}
.back-top:hover{background:var(--orange-deep)}

/* =========================================================
   滚动揭示动画（渐进增强）
   ========================================================= */
.reveal{opacity:1;transform:none;transition:opacity .7s cubic-bezier(.22,.61,.2,1),transform .7s cubic-bezier(.22,.61,.2,1)}
html.js .reveal{opacity:0;transform:translateY(28px)}
html.js .reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}.reveal.d4{transition-delay:.32s}

/* =========================================================
   响应式
   ========================================================= */
@media(max-width:1024px){
  .pillar-grid,.prod-grid,.fields-grid{grid-template-columns:repeat(2,1fr)}
  .partner-grid{grid-template-columns:repeat(4,1fr)}
  .about-grid,.contact-grid,.flagship,.storage-grid{grid-template-columns:1fr;gap:40px}
  .about-visual .badge{right:0}
  .case-grid,.news-grid,.qual-grid{grid-template-columns:repeat(2,1fr)}
  .video-card video{max-height:480px;aspect-ratio:16/9}
}
@media(max-width:760px){
  .wrap{padding:0 20px}
  .topbar{display:none}
  /* 手机端无顶部信息条，首屏直接占满整个视口（svh 兼容手机地址栏收缩） */
  .hero{min-height:100vh;min-height:100svh}
  .header{top:0}
  .nav-menu{position:fixed;top:0;right:-100%;width:80%;max-width:340px;height:100vh;background:#fff;flex-direction:column;align-items:stretch;gap:0;padding:100px 26px 40px;box-shadow:-20px 0 60px -20px rgba(0,0,0,.4);transition:right .4s}
  .nav-menu.open{right:0}
  .nav-menu a{color:var(--ink) !important;padding:16px 6px;border-bottom:1px solid var(--line);font-size:18.5px}
  .nav-menu a::after{display:none}
  .nav-menu .nav-cta{text-align:center;margin-top:20px;border-bottom:0}
  .nav-toggle{display:flex;z-index:101}
  .lang-switch{z-index:101;padding-left:12px}
  .lang-trigger{padding:6px 8px;font-size:14px;gap:5px}
  .lang-trigger span{display:none}      /* 手机端只留地球图标，节省横向空间 */
  .lang-menu{min-width:136px}
  /* 侧滑菜单(白底)展开时，语言按钮换深色保证可见 */
  .nav-menu.open ~ .nav-side .lang-switch{border-left-color:var(--line)}
  .nav-menu.open ~ .nav-side .lang-trigger{color:var(--ink)}
  .nav-toggle.open span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
  .nav-toggle.open span:nth-child(2){opacity:0}
  .nav-toggle.open span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}
  .header.scrolled .nav-toggle.open span{background:var(--ink)}
  .pillar-grid,.prod-grid,.fields-grid,.about-points,.flagship-feats,.storage-feats,
  .case-grid,.news-grid,.qual-grid,.form-row,.foot-top{grid-template-columns:1fr}
  .hero-stats .wrap{grid-template-columns:repeat(2,1fr);gap:24px}
  .about,.pillars,.products,.partners,.storage,.cases,.qual,.news,.contact{padding:80px 0}
  /* 合作伙伴与应用领域的小标题跟其余板块一样居中，全站保持一致 */
  .partners-head{margin:0 auto 30px}
  .partners-kicker{margin-bottom:16px;font-size:14px;letter-spacing:2px}
  .partners-kicker i{width:34px}
  .fields-head{gap:8px;margin-bottom:26px}
  .fields-head h3{font-size:23px}
  .fields-head p{font-size:15px}
  .fields,.flagship{padding:30px}
  .proj-banner .pb-inner{padding:28px}
  .mr-list{grid-template-columns:1fr}
  .more-recs{padding:26px 22px}
  .proj-stats .ps{padding:12px 16px;min-height:84px}
  .about-visual .photo img{height:auto;aspect-ratio:16/10}
  .about-visual .badge{position:static;display:inline-block;margin-top:16px}
}

/* ============ 首屏视差 ============ */
.hero-deco{z-index:1}
.hero-inner{will-change:transform,opacity}
.hero-deco{will-change:transform}

/* ============ 储能视频卡 · 滚入自动播放（合并原品牌横幅动效） ============ */
/* 视频初始轻微放大，播放后缓缓归位，营造电影感入场 */
.video-card video{cursor:pointer;transform:scale(1.06);transition:transform 1.6s ease}
.video-card.playing video{transform:scale(1)}
/* 声音开关：右下角玻璃圆钮 */
.v-sound{position:absolute;right:16px;bottom:16px;z-index:3;width:46px;height:46px;border-radius:50%;
  border:1px solid rgba(255,255,255,.35);background:rgba(0,0,0,.45);backdrop-filter:blur(8px);
  display:grid;place-items:center;cursor:pointer;transition:transform .25s ease,background .25s ease}
.v-sound:hover{transform:scale(1.1);background:rgba(255,122,26,.85)}
.v-sound svg{width:21px;height:21px;stroke:#fff;fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.v-sound .ic-sound{display:none}
.video-card.sound-on .v-sound .ic-mute{display:none}
.video-card.sound-on .v-sound .ic-sound{display:block}

/* ============ 更丰富的滚动渐入变体 ============ */
/* 在基础 .reveal 之上叠加方向/缩放，.in 时归位；.in 选择器更具体以覆盖基础规则 */
html.js .reveal.rv-right{transform:translateY(28px) translateX(44px)}
html.js .reveal.rv-left{transform:translateY(28px) translateX(-44px)}
html.js .reveal.rv-zoom{transform:scale(.9)}
html.js .reveal.rv-right.in,
html.js .reveal.rv-left.in,
html.js .reveal.rv-zoom.in{transform:none}

/* ============ 首屏加载入场：标题/文案/标签/按钮依次浮现 ============ */
@keyframes riseIn{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}
html.js .hero-inner>*{animation:riseIn .85s cubic-bezier(.22,.61,.2,1) backwards}
html.js .hero-inner>*:nth-child(2){animation-delay:.1s}
html.js .hero-inner>*:nth-child(3){animation-delay:.2s}
html.js .hero-inner>*:nth-child(4){animation-delay:.3s}
html.js .hero-inner>*:nth-child(5){animation-delay:.4s}
html.js .hero-stats .stat{animation:riseIn .8s cubic-bezier(.22,.61,.2,1) backwards}
html.js .hero-stats .stat:nth-child(1){animation-delay:.45s}
html.js .hero-stats .stat:nth-child(2){animation-delay:.55s}
html.js .hero-stats .stat:nth-child(3){animation-delay:.65s}
html.js .hero-stats .stat:nth-child(4){animation-delay:.75s}

/* ============ 导航滚动定位：当前板块下划线常亮 ============ */
.nav-menu a.active::after{transform:scaleX(1)}

/* ============ 英文模式排版优化 ============ */
/* 中文字距(letter-spacing)在英文下会拉散单词，统一收紧；长单词标题适当缩小防溢出 */
html[lang=en] h1,html[lang=en] h2,html[lang=en] h3,html[lang=en] h4{text-wrap:balance}
html[lang=en] .eyebrow{letter-spacing:1.5px}
html[lang=en] .hero h1{font-size:clamp(34px,5.4vw,66px);letter-spacing:0;line-height:1.12}
html[lang=en] .sec-title{letter-spacing:0;font-size:clamp(28px,3.7vw,42px)}
html[lang=en] .storage-body h2{font-size:clamp(26px,3.5vw,40px)}
html[lang=en] .proj-banner h3{letter-spacing:0}
html[lang=en] .nav-menu a{font-size:15.5px;padding:10px 11px}
html[lang=en] .nav-menu a::after{left:11px;right:11px}
html[lang=en] .hero-tags a{font-size:14.5px;letter-spacing:0}
html[lang=en] .case-card h4{font-size:20px;line-height:1.3}
html[lang=en] .hero-stats .lbl{font-size:13.5px}
html[lang=en] .qual-item .seal{font-size:16px;letter-spacing:0}
html[lang=en] .flagship-body h3{font-size:26px}

/* ============ 日文模式排版优化 ============ */
/* 日文假名较宽、无词间空格，标题需收字距并适度降字号，避免撑破容器 */
html[lang=ja] body{font-family:'Noto Sans JP','Hiragino Sans','Yu Gothic',var(--sans)}
html[lang=ja] .eyebrow{letter-spacing:1.5px}
html[lang=ja] .hero h1{font-size:clamp(32px,5vw,62px);letter-spacing:0;line-height:1.22}
html[lang=ja] .sec-title{letter-spacing:0;font-size:clamp(26px,3.5vw,40px)}
html[lang=ja] .about-text .sec-title{font-size:clamp(24px,3vw,36px)}
html[lang=ja] .storage-body h2{font-size:clamp(24px,3.2vw,38px);letter-spacing:0}
html[lang=ja] .proj-banner h3{letter-spacing:0;font-size:clamp(22px,2.9vw,32px)}
html[lang=ja] .nav-menu a{font-size:15px;padding:10px 10px}
html[lang=ja] .nav-menu a::after{left:10px;right:10px}
html[lang=ja] .hero-tags a{font-size:14px;letter-spacing:0}
html[lang=ja] .case-card h4{font-size:20px;line-height:1.35}
html[lang=ja] .pillar h3{font-size:21px}
html[lang=ja] .qual-item b,html[lang=ja] .field-item b{font-size:16px}
html[lang=ja] .qual-item .seal{font-size:16px;letter-spacing:0}
html[lang=ja] .flagship-body h3{font-size:24px}
html[lang=ja] .cm-panel h3{font-size:22px}

/* =========================================================
   移动端体验：安全导航、紧凑首屏、横向内容轨道
   ========================================================= */
.nav-backdrop{display:none;border:0;padding:0;background:transparent}
.hero-line{display:inline}
.hero-line+.hero-line::before{content:"　"}
html[lang=en] .hero-line,html[lang=ja] .hero-line{display:block}
html[lang=en] .hero-line+.hero-line::before,html[lang=ja] .hero-line+.hero-line::before{content:none}

@media(max-width:760px){
  body.nav-open{overflow:hidden}
  .nav{height:72px}
  .header.scrolled .nav{height:64px}
  .nav-logo{position:relative;z-index:99;min-width:0}
  .nav-logo img{height:38px;max-width:190px;object-fit:contain;object-position:left center}
  .nav-menu{z-index:101;width:min(82vw,340px);height:100dvh;padding:88px 24px max(34px,env(safe-area-inset-bottom));transition:right .32s ease}
  .nav-side{position:relative;z-index:103;margin-left:12px;gap:8px}
  .nav-toggle{position:relative;z-index:104;width:44px;height:44px;align-items:center;justify-content:center}
  .nav-toggle.open span{background:var(--ink)!important}
  .nav-backdrop{display:block;position:fixed;z-index:100;inset:0;background:rgba(4,17,30,.48);opacity:0;visibility:hidden;pointer-events:none;transition:opacity .28s ease,visibility .28s ease}
  body.nav-open .nav-backdrop{opacity:1;visibility:visible;pointer-events:auto}

  /* 窄屏取消横向滑入：44px 侧移会把文档撑宽（集团概况的配图就是这样溢出的），
     只保留纵向浮现，动效观感在小屏上几乎无差别 */
  html.js .reveal.rv-right,html.js .reveal.rv-left{transform:translateY(28px)}

  .hero{min-height:auto}
  .hero-inner{justify-content:flex-start;width:100%;max-width:none;padding-top:116px;padding-bottom:44px}
  .hero-inner>.eyebrow{font-size:12px;letter-spacing:1.8px;line-height:1.4}
  .hero h1,html[lang=en] .hero h1,html[lang=ja] .hero h1{margin-top:18px;font-size:clamp(34px,9.8vw,42px);line-height:1.12;letter-spacing:0;text-wrap:balance}
  .hero-line{display:block}
  .hero-line+.hero-line::before{content:none}
  .hero p.lead{margin-top:22px;max-width:36em;font-size:16px;line-height:1.75;letter-spacing:0}
  html[lang=en] .hero p.lead{font-size:15.5px;line-height:1.68}
  html[lang=ja] .hero p.lead{font-size:15px;line-height:1.8}
  .hero-tags{flex-wrap:nowrap;gap:10px;margin:24px -20px 0;padding:0 20px 8px;overflow-x:auto;scroll-snap-type:x proximity;scroll-padding-inline:20px;overscroll-behavior-inline:contain;scrollbar-width:none}
  .hero-tags::-webkit-scrollbar{display:none}
  .hero-tags a{flex:0 0 auto;scroll-snap-align:start;padding:8px 17px;font-size:14px;white-space:nowrap}
  html[lang=en] .hero-tags a,html[lang=ja] .hero-tags a{font-size:13px}
  .hero-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:28px}
  .hero-actions .btn{min-width:0;padding:13px 10px;justify-content:center;font-size:14px;white-space:nowrap}
  html[lang=en] .hero-actions .btn,html[lang=ja] .hero-actions .btn{font-size:13px}
  .hero-stats .wrap{gap:0;padding-top:20px;padding-bottom:20px}
  .hero-stats .stat{padding:13px 8px}
  .hero-stats .num{font-size:32px}
  .hero-stats .num small{font-size:16px}
  .hero-stats .lbl{font-size:13px}

  /* 窄屏只剩新闻用横向轨道：3 篇、卡片带缩略图较高，纵向铺开太占屏；
     其余板块一律纵向或多列铺开，不让内容藏在划动后面。 */
  .news-grid{
    display:grid;grid-template-columns:none;grid-template-rows:1fr;grid-auto-flow:column;
    grid-auto-columns:min(84vw,340px);gap:14px;margin-inline:-20px;padding:4px 20px 20px;
    overflow-x:auto;overflow-y:hidden;scroll-snap-type:x mandatory;scroll-padding-inline:20px;
    overscroll-behavior-inline:contain;-webkit-overflow-scrolling:touch;scrollbar-width:none
  }
  .news-grid::-webkit-scrollbar,.mr-list::-webkit-scrollbar{display:none}
  .news-grid>*{scroll-snap-align:start;scroll-snap-stop:always}
  .news-card{height:100%}

  /* 四大主业：只有 4 项且是全站最该被看到的内容，纵向全部铺开。
     不用 2×2 是因为卡片里有整句描述和 3-4 个标签，半屏宽会把中文挤成四五行。 */
  .pillar-grid{grid-template-columns:1fr;gap:12px}
  .pillar{min-height:236px;padding:26px 22px}
  .pillar .pic{width:52px;height:52px;border-radius:14px;margin-bottom:16px}
  .pillar .pic svg{width:26px;height:26px}
  .pillar .pnum{top:18px;right:20px;font-size:32px}
  .pillar h3{font-size:20px;margin-bottom:8px}
  .pillar p{font-size:14.5px}
  .pillar .tags{margin-top:12px;gap:6px}
  .pillar .tags span{font-size:12.5px;padding:4px 10px}

  /* 产品中心：8 张卡文案短（标题 + 一句话 + 手册链接），两列一次全展示 */
  .prod-grid{grid-template-columns:repeat(2,1fr);gap:12px}
  .prod-card{min-height:0;padding:18px 15px}
  .prod-ic{width:44px;height:44px;border-radius:12px;margin-bottom:12px}
  .prod-ic svg{width:22px;height:22px}
  .prod-card h4{font-size:16px;margin-bottom:6px}
  .prod-card p{font-size:13px;line-height:1.6}
  .prod-card .dl{margin-top:10px;font-size:13px}

  /* 客户案例：12 张卡纵向堆叠，默认只放 4 张，其余点「展开」再出现 */
  .case-grid{grid-template-columns:1fr;gap:12px}
  .case-grid:not(.expanded)>.case-card:nth-child(n+5){display:none}
  /* 触屏没有 hover，「查看详情」常驻；留出底部条避免与正文最后一行相撞 */
  .case-card,.case-card.tall{min-height:208px;padding:22px 20px 46px}
  .case-card .cat{font-size:12.5px;letter-spacing:1.4px;margin-bottom:7px}
  .case-card h4,html[lang=en] .case-card h4,html[lang=ja] .case-card h4{font-size:20px;line-height:1.34}
  .case-card p{font-size:14px;margin-top:6px}
  .case-card::after{right:20px;bottom:18px;font-size:13px;opacity:1;transform:none}

  /* 资质荣誉：7 项本身就是短文本，纵向单列比横滑更快读完 */
  .qual-grid{grid-template-columns:1fr;gap:10px;margin-top:4px}
  .qual-feature{grid-column:auto}
  .qual-item{padding:16px 18px;gap:14px}
  .qual-item .seal{flex:0 0 44px;height:44px;font-size:17px}
  .qual-item b,.qual-feature b{font-size:16px}
  .qual-item span{font-size:13.5px;line-height:1.55}

  /* 应用领域：4 项都是「标题 + 一行说明」，纵向单列直接全显示。
     图标改到左侧并跨两行，卡片高度才不会因为图标独占一行而翻倍。 */
  .fields-grid{grid-template-columns:1fr;gap:10px}
  .field-item{min-height:0;padding:14px 16px;
    display:grid;grid-template-columns:auto 1fr;column-gap:14px;align-items:center}
  .field-item::before{grid-row:1/3;grid-column:1;width:30px;height:30px;margin-bottom:0}
  .field-item b{grid-column:2;font-size:16px;margin-bottom:2px;align-self:end}
  .field-item span{grid-column:2;font-size:13.5px;align-self:start}

  /* 合作伙伴：35 家横滑要划十几屏，改为 3 列网格，默认 15 家（5 行）够建立印象 */
  .partner-grid{grid-template-columns:repeat(3,1fr);border-radius:16px}
  .partner-grid:not(.expanded)>.partner-logo:nth-child(n+16){display:none}
  /* 35 不能被 3 整除，展开后补一格空白，网格线才不会缺角 */
  .partner-grid.expanded::after{content:"";background:rgba(255,255,255,.94);
    box-shadow:inset -1px -1px 0 rgba(18,71,126,.12)}
  .partner-logo{height:78px;padding:12px 8px}
  .partner-logo img{width:min(100%,118px);height:48px;opacity:.8}

  .grid-more{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;
    margin-top:14px;padding:14px 18px;font-family:inherit;font-size:15px;font-weight:600;
    color:var(--blue);background:#fff;border:1px solid var(--line);border-radius:12px;cursor:pointer;
    transition:background-color .25s ease,border-color .25s ease}
  .grid-more:active{background:var(--blue-soft);border-color:var(--blue)}
  .grid-more .gm-arrow{font-size:13px;transition:transform .25s ease}
  .grid-more[aria-expanded=true] .gm-arrow{transform:rotate(180deg)}

  .mr-list{
    display:grid;grid-template-columns:none;grid-template-rows:repeat(2,auto);grid-auto-flow:column;
    grid-auto-columns:min(80vw,310px);gap:10px;margin-inline:-2px;padding:2px 2px 12px;
    overflow-x:auto;scroll-snap-type:x mandatory;overscroll-behavior-inline:contain;
    -webkit-overflow-scrolling:touch;scrollbar-width:none
  }
  .mr-list li{padding:14px;border:1px solid var(--line);border-radius:12px;background:#fff;scroll-snap-align:start}
  .mr-list li:hover{padding-left:14px}

  .flagship-media img{height:auto;aspect-ratio:4/3}
  .storage-grid,.flagship{gap:28px}
  /* 详情弹窗：桌面是左图右文，窄屏必须改成上图下文，否则配图被压成竖条。
     面板本身不滚动、只让正文区滚，关闭键才不会随正文一起划走。 */
  .case-modal{padding:14px}
  .cm-panel{display:flex;flex-direction:column;overflow:hidden;
    width:100%;max-height:88dvh;border-radius:18px}
  .cm-media{flex:0 0 auto}
  .cm-media img{width:100%;height:auto;min-height:0;aspect-ratio:16/10}
  /* min-height:0 不能省：flex 子项默认 min-height:auto，不肯收缩到内容高度以下，
     正文会被面板的 overflow:hidden 裁掉且滚不动 */
  .cm-body{flex:1 1 auto;min-height:0;overflow-y:auto;-webkit-overflow-scrolling:touch;
    padding:22px 20px 24px}
  .cm-panel h3{font-size:21px;line-height:1.35}
  html[lang=en] .cm-panel h3,html[lang=ja] .cm-panel h3{font-size:19px}
  .cm-cat{font-size:12.5px;letter-spacing:1.6px}
  .cm-sub{font-size:13.5px;padding-bottom:14px}
  .cm-desc{font-size:14.5px;line-height:1.85;margin-top:14px;margin-bottom:22px}
  /* 触屏上按钮铺满更好点 */
  .cm-cta{align-self:stretch;justify-content:center;padding:13px 20px}
  .cm-close{right:10px;top:10px;width:36px;height:36px;font-size:22px}
  .cm-article .cm-body{padding:26px 20px 26px}
}

@media(max-width:390px){
  .wrap{padding-inline:16px}
  .nav-logo img{height:34px;max-width:168px}
  .hero-inner{padding-top:106px}
  .hero h1,html[lang=en] .hero h1,html[lang=ja] .hero h1{font-size:clamp(31px,9.5vw,37px)}
  .hero-tags{margin-inline:-16px;padding-inline:16px}
  .hero-actions{grid-template-columns:1fr}
  .hero-actions .btn{width:100%}
  .news-grid{margin-inline:-16px;padding-inline:16px;grid-auto-columns:84vw}
  .prod-grid{gap:10px}
  .prod-card{padding:16px 13px}
  .prod-card h4{font-size:15px}
  .partner-logo{height:70px;padding:10px 6px}
  .partner-logo img{width:min(100%,104px);height:42px}
}

/* ============ 无障碍：尊重「减弱动态效果」系统设置 ============ */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  html.js .reveal,html.js .reveal.rv-right,html.js .reveal.rv-left,html.js .reveal.rv-zoom{
    opacity:1;transform:none;transition:none}
  .hero-inner{transform:none !important;opacity:1 !important}
  html.js .hero-inner>*,html.js .hero-stats .stat{animation:none}
  .video-card video{transform:none !important;transition:none}
}