/* =====================================================================
   枳年智能 · 官网样式系统  Zhinian Intelligent Technology
   设计语言：白底浅色 + 品牌蓝(取自 LOGO) + 少量科技渐变 + 环保绿点缀
   参考结构：工业企业官网（大图开屏 / 分类宫格 / 图文对开 / 面板手风琴）
   ===================================================================== */

/* ---------- 1. 设计令牌 Design Tokens ---------- */
:root{
  /* 品牌色：主色取自公司小程序主题蓝 #007AFF（iOS 系统蓝） */
  --blue-900:#0A2A52;   /* 深蓝：页脚 / 深色区块 */
  --blue-800:#0B4491;
  --blue-700:#0062D6;   /* 深一档：按钮悬停 + 浅底上的小号蓝字（保证可读性） */
  --blue-600:#007AFF;   /* 主色 Primary（小程序主题蓝） */
  --blue-500:#339BFF;
  --blue-400:#66B4FF;
  --blue-200:#B8DDFF;
  --blue-100:#E8F3FF;   /* 取自小程序 */
  --blue-050:#F0F7FF;   /* 取自小程序 */

  --cyan-500:#00C6E0;   /* 科技渐变辅色 */
  --green-600:#2FA84F;  /* 环保绿（取自 LOGO 叶片） */
  --green-100:#E6F6EB;

  /* 中性色：与小程序同一套 iOS 灰阶 */
  --ink-900:#1D1D1F;    /* 标题 */
  --ink-700:#3C3C43;    /* 正文 */
  --ink-500:#8E8E93;    /* 次要文字 */
  --ink-300:#AEAEB2;
  --line:#E5E5EA;       /* 分隔线 / 卡片描边 */
  --line-soft:#F0F2F5;
  --bg:#FFFFFF;
  --bg-soft:#F5F7FA;    /* 浅灰区块底（取自小程序） */
  --bg-blue:#F0F7FF;

  /* 阴影：弥散、低对比，浅色系关键 */
  --sh-1:0 2px 8px rgba(0,40,90,.05);
  --sh-2:0 10px 30px rgba(0,40,90,.08);
  --sh-3:0 24px 60px rgba(0,40,90,.12);

  --radius:4px;
  --radius-lg:8px;

  --maxw:1280px;
  --gut:32px;
  --header-h:84px;

  --ease:cubic-bezier(.22,.75,.28,1);
  --t:.42s var(--ease);
}

/* ---------- 2. 基础 Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink-700);
  font-family:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",Roboto,-apple-system,sans-serif;
  font-size:15px;line-height:1.8;letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5{margin:0;color:var(--ink-900);font-weight:700;line-height:1.35;letter-spacing:.005em}
p{margin:0}
button,input,textarea,select{font:inherit;color:inherit}
::selection{background:var(--blue-600);color:#fff}

/* 滚动条（桌面端） */
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:#D1D1D6;border-radius:10px;border:3px solid #fff}
::-webkit-scrollbar-thumb:hover{background:var(--blue-400)}

/* ---------- 3. 布局工具 ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--gut)}
.wrap-wide{max-width:1560px;margin:0 auto;padding:0 var(--gut)}
.section{padding:96px 0}
.section-sm{padding:64px 0}
.bg-soft{background:var(--bg-soft)}
.bg-blue{background:var(--bg-blue)}
.bg-dark{background:var(--blue-900);color:#C9D8E8}
.bg-dark h2,.bg-dark h3,.bg-dark h4{color:#fff}
.grid{display:grid;gap:24px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.center{text-align:center}
.rel{position:relative}

/* ---------- 4. 标题体系 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--blue-700);letter-spacing:.16em;font-weight:600;margin-bottom:14px;
}
.eyebrow::before{content:"";width:20px;height:2px;background:var(--blue-700)}
.eyebrow.light{color:var(--blue-400)}
.eyebrow.light::before{background:var(--blue-400)}
.h-sec{font-size:34px;line-height:1.3}
.h-sec small{display:block;font-size:14px;font-weight:400;color:var(--ink-300);letter-spacing:.28em;margin-top:10px;text-transform:uppercase}
.lead{margin-top:16px;max-width:760px;color:var(--ink-500);font-size:15px}
.sec-head{margin-bottom:44px}
.sec-head.center .lead{margin-left:auto;margin-right:auto}

/* 巨型英文水印字（参考站的核心版式特征） */
.watermark{
  position:absolute;left:50%;top:0;transform:translate(-50%,-38%);
  font-family:Roboto,Arial,sans-serif;font-weight:800;font-size:clamp(72px,11vw,168px);
  letter-spacing:.02em;color:#0F1E2E;opacity:.045;white-space:nowrap;pointer-events:none;user-select:none;
}
.watermark.light{color:#fff;opacity:.14}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;height:46px;padding:0 26px;
  background:var(--blue-600);color:#fff;font-size:14px;font-weight:500;border:1px solid var(--blue-600);
  border-radius:var(--radius);cursor:pointer;transition:var(--t);position:relative;overflow:hidden;
}
.btn::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,var(--blue-700),var(--cyan-500));opacity:0;transition:var(--t)}
.btn span,.btn svg{position:relative;z-index:1}
.btn:hover{box-shadow:0 10px 24px rgba(0,122,255,.30);transform:translateY(-2px)}
.btn:hover::after{opacity:1}
.btn-ghost{background:transparent;color:var(--blue-600);border-color:var(--blue-200)}
.btn-ghost::after{display:none}
.btn-ghost:hover{background:var(--blue-600);color:#fff;border-color:var(--blue-600)}
.btn-white{background:#fff;color:var(--blue-700);border-color:#fff}
.btn-white::after{display:none}
.btn-white:hover{background:var(--blue-050)}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn-outline-light::after{display:none}
.btn-outline-light:hover{background:#fff;color:var(--blue-700)}
.link-more{display:inline-flex;align-items:center;gap:6px;color:var(--blue-700);font-size:13px;transition:var(--t)}
.link-more:hover{gap:12px}

/* ---------- 6. 顶部导航 ---------- */
.header{
  position:fixed;inset:0 0 auto 0;height:var(--header-h);z-index:900;
  background:rgba(255,255,255,.72);backdrop-filter:saturate(180%) blur(18px);
  -webkit-backdrop-filter:saturate(180%) blur(18px);
  border-bottom:1px solid rgba(228,235,243,.9);transition:var(--t);
}
.header.on-hero{background:rgba(255,255,255,.06);border-bottom-color:rgba(255,255,255,.14)}
/* 导航条撑满整个视口宽度：LOGO 贴左、语言/联系按钮贴右，不跟内容区一起被收进 1560px */
.header-inner{max-width:100%;margin:0;padding:0 clamp(18px,2.4vw,52px);height:100%;display:flex;align-items:center;gap:40px}
.logo{display:flex;align-items:center;height:100%}
.logo img{height:46px;width:auto;transition:var(--t)}
.logo .logo-w{display:none}
.header.on-hero .logo .logo-b{display:none}
.header.on-hero .logo .logo-w{display:block}
.nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav > li > a{
  display:block;padding:0 18px;line-height:var(--header-h);font-size:15px;color:var(--ink-700);
  position:relative;transition:var(--t);white-space:nowrap;
}
.nav > li > a::after{
  content:"";position:absolute;left:18px;right:18px;bottom:22px;height:2px;background:var(--blue-600);
  transform:scaleX(0);transform-origin:left;transition:var(--t);
}
.nav > li > a:hover,.nav > li.active > a{color:var(--blue-600)}
.nav > li > a:hover::after,.nav > li.active > a::after{transform:scaleX(1)}
.header.on-hero .nav > li > a{color:rgba(255,255,255,.9)}
.header.on-hero .nav > li > a:hover,.header.on-hero .nav > li.active > a{color:#fff}
.header.on-hero .nav > li > a::after{background:#fff}
.header-tools{display:flex;align-items:center;gap:14px}
.icon-btn{
  width:36px;height:36px;display:grid;place-items:center;border:1px solid var(--line);background:#fff;
  border-radius:50%;color:var(--ink-500);cursor:pointer;transition:var(--t);
}
.icon-btn:hover{border-color:var(--blue-600);color:var(--blue-600)}
.header.on-hero .icon-btn{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.32);color:#fff}
.lang{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;height:32px;min-width:74px;padding:0 14px;border-radius:16px;border:0;
  background:var(--blue-600);color:#fff;font-size:12px;cursor:pointer;transition:var(--t);
}
.lang:hover{background:var(--blue-700)}
.burger{display:none;width:38px;height:38px;border:0;background:transparent;cursor:pointer}
.burger span{display:block;width:20px;height:2px;margin:4px auto;background:var(--ink-900);transition:var(--t)}
.header.on-hero .burger span{background:#fff}

/* 下拉菜单 */
.nav li.has-sub{position:relative}
.subnav{
  position:absolute;top:var(--header-h);left:0;min-width:210px;background:#fff;border:1px solid var(--line);
  box-shadow:var(--sh-2);padding:8px 0;opacity:0;visibility:hidden;transform:translateY(8px);transition:var(--t);
}
.nav li.has-sub:hover .subnav{opacity:1;visibility:visible;transform:translateY(0)}
.subnav a{display:block;padding:9px 20px;font-size:14px;color:var(--ink-700);transition:var(--t)}
.subnav a:hover{background:var(--blue-050);color:var(--blue-700);padding-left:26px}

/* ---------- 7. 首页开屏 Hero ---------- */
.hero{position:relative;height:100vh;min-height:620px;max-height:900px;overflow:hidden;background:var(--blue-900)}
.hero-slide{position:absolute;inset:0;opacity:0;transition:opacity 1.1s var(--ease);pointer-events:none}
.hero-slide.active{opacity:1;pointer-events:auto}
.hero-bg{position:absolute;inset:0}
.hero-bg svg,.hero-bg img{width:100%;height:100%;object-fit:cover}
.hero-veil{position:absolute;inset:0;background:linear-gradient(100deg,rgba(11,37,64,.86) 0%,rgba(16,54,92,.62) 42%,rgba(18,181,201,.14) 100%)}
.hero-inner{position:relative;height:100%;display:flex;align-items:center}
.hero-copy{max-width:720px;color:#fff;padding-top:var(--header-h)}
.hero-tag{
  display:inline-flex;align-items:center;gap:10px;height:32px;padding:0 16px;margin-bottom:26px;
  border:1px solid rgba(255,255,255,.28);border-radius:16px;background:rgba(255,255,255,.08);
  font-size:13px;letter-spacing:.06em;backdrop-filter:blur(6px);
}
.hero-tag i{width:6px;height:6px;border-radius:50%;background:var(--green-600);box-shadow:0 0 0 4px rgba(47,168,79,.25)}
.hero h1{color:#fff;font-size:clamp(32px,4.4vw,58px);line-height:1.24;letter-spacing:.01em}
.hero h1 em{font-style:normal;color:#8FD3FF}
.hero-sub{margin-top:22px;font-size:16px;line-height:2;color:rgba(255,255,255,.78);max-width:620px}
.hero-actions{margin-top:38px;display:flex;gap:14px;flex-wrap:wrap}
.hero-meta{
  position:absolute;left:0;right:0;bottom:0;border-top:1px solid rgba(255,255,255,.16);
  background:linear-gradient(180deg,rgba(11,37,64,0),rgba(11,37,64,.35));
}
.hero-meta ul{max-width:1560px;margin:0 auto;padding:0 var(--gut);display:grid;grid-template-columns:repeat(4,1fr)}
.hero-meta li{padding:26px 0;color:rgba(255,255,255,.72);font-size:13px;border-left:1px solid rgba(255,255,255,.14);padding-left:26px}
.hero-meta li:first-child{border-left:0;padding-left:0}
.hero-meta li span{display:block;color:#fff;font-size:15px;font-weight:600;margin-bottom:2px;letter-spacing:.02em}
.hero-nav{position:absolute;right:var(--gut);bottom:130px;display:flex;gap:8px;z-index:3}
.hero-nav button{
  width:44px;height:44px;border:1px solid rgba(255,255,255,.34);background:rgba(255,255,255,.08);color:#fff;
  cursor:pointer;transition:var(--t);display:grid;place-items:center;backdrop-filter:blur(6px);
}
.hero-nav button:hover{background:#fff;color:var(--blue-700)}
.hero-dots{position:absolute;left:var(--gut);bottom:146px;display:flex;gap:10px;z-index:3}
.hero-dots i{width:30px;height:3px;background:rgba(255,255,255,.3);cursor:pointer;transition:var(--t)}
.hero-dots i.active{background:#fff;width:52px}

/* ---------- 8. 内页 Banner ---------- */
/* 内页 Banner：与首页开屏同一套浅色语言，导航条始终是白色毛玻璃 */
.pagehead{
  position:relative;height:340px;overflow:hidden;display:flex;align-items:center;
  background:linear-gradient(165deg,#FAFCFF 0%,#EDF4FD 48%,#F7FAFF 100%);
  border-bottom:1px solid var(--line);
}
.pagehead::before,.pagehead::after{content:"";position:absolute;border-radius:50%;pointer-events:none}
.pagehead::before{width:560px;height:560px;right:-120px;top:-220px;background:radial-gradient(circle,rgba(90,160,240,.20),transparent 68%)}
.pagehead::after{width:420px;height:420px;left:-160px;bottom:-200px;background:radial-gradient(circle,rgba(18,181,201,.14),transparent 68%)}
.pagehead .hero-bg{opacity:.10;filter:saturate(.7)}
.pagehead .hero-veil{background:linear-gradient(100deg,rgba(255,255,255,.82) 0%,rgba(255,255,255,.52) 60%,rgba(255,255,255,.2) 100%)}
.pagehead-inner{position:relative;width:100%;padding-top:var(--header-h);color:var(--ink-700)}
.pagehead h1{color:var(--ink-900);font-size:clamp(28px,3.4vw,42px)}
.pagehead .en{display:block;font-family:Roboto,Arial,sans-serif;font-size:13px;letter-spacing:.34em;color:var(--blue-400);margin-top:12px;text-transform:uppercase}
.crumb{margin-top:26px;font-size:13px;color:var(--ink-500);display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.crumb a:hover{color:var(--blue-700)}
/* 内页二级 Tab 条 */
.pagetabs{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:var(--header-h);z-index:500}
.pagetabs ul{display:flex;flex-wrap:wrap}
.pagetabs a{display:block;padding:20px 26px;font-size:14px;color:var(--ink-500);position:relative;transition:var(--t)}
.pagetabs a::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--blue-600);transform:scaleX(0);transition:var(--t)}
.pagetabs a:hover{color:var(--blue-700)}
.pagetabs li.active a{color:var(--blue-700);font-weight:600}
.pagetabs li.active a::after,.pagetabs a:hover::after{transform:scaleX(1)}

/* ---------- 9. 卡片：核心系统宫格 ---------- */
.card-sys{
  position:relative;background:#fff;border:1px solid var(--line);padding:34px 30px 30px;
  transition:var(--t);overflow:hidden;display:flex;flex-direction:column;min-height:216px;
}
.card-sys::before{content:"";position:absolute;left:0;top:0;width:100%;height:2px;background:linear-gradient(90deg,var(--blue-600),var(--cyan-500));transform:scaleX(0);transform-origin:left;transition:var(--t)}
.card-sys:hover,.card-sys.is-active{border-color:var(--blue-600);box-shadow:var(--sh-2);transform:translateY(-4px)}
.card-sys:hover::before,.card-sys.is-active::before{transform:scaleX(1)}
.card-sys .abbr{font-family:Roboto,Arial,sans-serif;font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--blue-500)}
.card-sys h3{margin:10px 0 12px;font-size:20px;padding-right:56px}
.card-sys p{font-size:13.5px;color:var(--ink-500);line-height:1.85}
.card-sys .ico{
  position:absolute;right:24px;top:28px;width:46px;height:46px;display:grid;place-items:center;
  background:var(--blue-050);color:var(--blue-600);border-radius:var(--radius);transition:var(--t);
}
.card-sys:hover .ico{background:var(--blue-600);color:#fff}
.card-sys .foot{margin-top:auto;padding-top:18px;font-size:12.5px;color:var(--ink-300);display:flex;align-items:center;gap:6px}
.card-sys:hover .foot{color:var(--blue-700)}

/* ---------- 10. 图文对开 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:64px}
.split.rev .split-media{order:2}
.split-copy .feat{margin-top:28px;display:grid;gap:14px}
.split-copy .feat li{display:flex;gap:12px;align-items:flex-start;font-size:14px;color:var(--ink-700)}
.split-copy .feat i{flex:none;width:20px;height:20px;margin-top:5px;border-radius:50%;background:var(--blue-100);color:var(--blue-600);display:grid;place-items:center;font-size:11px;font-style:normal;line-height:1}
.media{position:relative;background:var(--bg-soft);overflow:hidden;border:1px solid var(--line)}
.media img,.media svg{width:100%;height:100%;object-fit:cover;display:block}
.media-tag{
  position:absolute;left:0;bottom:0;background:var(--blue-600);color:#fff;font-size:12px;padding:8px 18px;letter-spacing:.05em;
}

/* 数据条 */
.stats{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);background:#fff}
.stats li{padding:34px 28px;border-left:1px solid var(--line);text-align:center}
.stats li:first-child{border-left:0}
.stats .num{font-family:Roboto,Arial,sans-serif;font-size:42px;font-weight:700;color:var(--blue-600);line-height:1.1}
.stats .num sup{font-size:18px;vertical-align:super;margin-left:2px}
.stats .lb{margin-top:8px;font-size:13px;color:var(--ink-500)}

/* ---------- 11. 服务面板（悬停展开手风琴） ---------- */
.panels{display:flex;height:400px;border:1px solid var(--line);overflow:hidden}
.panel{
  position:relative;flex:1;transition:flex .55s var(--ease);overflow:hidden;cursor:pointer;
  border-left:1px solid var(--line);background:var(--bg-soft);
}
.panel:first-child{border-left:0}
.panel.on{flex:2.2}
.panel .p-bg{position:absolute;inset:0;transition:var(--t)}
.panel .p-bg svg{width:100%;height:100%}
.panel .p-veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,37,64,.12),rgba(11,37,64,.55));transition:var(--t)}
.panel.on .p-veil{background:linear-gradient(180deg,rgba(20,73,140,.72),rgba(11,37,64,.9))}
.panel .p-body{position:relative;height:100%;padding:34px 30px;display:flex;flex-direction:column;justify-content:flex-end;color:#fff}
.panel .p-ico{
  position:absolute;top:32px;left:30px;width:48px;height:48px;border-radius:50%;background:rgba(255,255,255,.9);
  color:var(--blue-600);display:grid;place-items:center;transition:var(--t);
}
.panel.on .p-ico{background:var(--blue-600);color:#fff}
.panel h3{font-size:19px;color:#fff}
.panel .p-txt{max-height:0;opacity:0;overflow:hidden;transition:var(--t);font-size:13.5px;color:rgba(255,255,255,.82)}
.panel.on .p-txt{max-height:180px;opacity:1;margin-top:12px}

/* ---------- 12. 行业解决方案（蓝色实心块 + 图标格） ---------- */
.solution-split{display:grid;grid-template-columns:1.05fr 1fr}
.solution-copy{background:linear-gradient(140deg,var(--blue-700),var(--blue-900));color:#fff;padding:70px 64px}
.solution-copy h2{color:#fff}
.solution-copy .lead{color:rgba(255,255,255,.72)}
.ind-grid{margin-top:38px;display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.16)}
.ind-grid a{
  background:var(--blue-800);padding:24px 16px;text-align:center;color:rgba(255,255,255,.85);
  font-size:13.5px;transition:var(--t);display:flex;flex-direction:column;align-items:center;gap:12px;
}
.ind-grid a:hover{background:#fff;color:var(--blue-700)}
.ind-grid .ico{width:34px;height:34px;display:grid;place-items:center}

/* ---------- 13. 节能环保区块 ---------- */
.eco{background:linear-gradient(180deg,#fff,var(--green-100))}
.eco .badge{display:inline-flex;align-items:center;gap:8px;color:var(--green-600);font-size:13px;font-weight:600;letter-spacing:.1em}
.eco-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px}
.eco-card{background:#fff;border:1px solid #D9EEE0;padding:32px;transition:var(--t)}
.eco-card:hover{box-shadow:0 16px 40px rgba(47,168,79,.14);transform:translateY(-4px)}
.eco-card .num{font-family:Roboto,Arial,sans-serif;font-size:40px;font-weight:700;color:var(--green-600)}
.eco-card h4{margin:6px 0 10px;font-size:17px}
.eco-card p{font-size:13.5px;color:var(--ink-500)}

/* ---------- 14. 新闻卡片 ---------- */
.news-card{background:#fff;border:1px solid var(--line);transition:var(--t);display:block;overflow:hidden}
.news-card:hover{box-shadow:var(--sh-2);transform:translateY(-4px);border-color:var(--blue-200)}
.news-card .thumb{height:190px;position:relative;overflow:hidden;background:var(--bg-soft)}
.news-card .thumb svg,.news-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.news-card:hover .thumb svg,.news-card:hover .thumb img{transform:scale(1.06)}
.news-card .body{padding:24px 26px 28px}
.news-card .date{font-family:Roboto,Arial,sans-serif;font-size:12.5px;color:var(--ink-300);letter-spacing:.08em}
.news-card h3{margin:10px 0 10px;font-size:17px;line-height:1.6;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card p{font-size:13px;color:var(--ink-500);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-row{display:flex;gap:28px;padding:28px 0;border-bottom:1px solid var(--line);transition:var(--t)}
.news-row:hover{background:var(--blue-050);padding-left:16px;padding-right:16px}
.news-row .d{flex:none;width:110px;text-align:center;border-right:1px solid var(--line);padding-right:20px}
.news-row .d b{display:block;font-family:Roboto,Arial,sans-serif;font-size:34px;color:var(--blue-700);font-weight:700}
.news-row .d span{font-size:12px;color:var(--ink-300)}
.news-row h3{font-size:17px;margin-bottom:8px}
.news-row p{font-size:13.5px;color:var(--ink-500)}

/* ---------- 15. 案例卡片 ---------- */
.case-card{position:relative;overflow:hidden;border:1px solid var(--line);background:#fff;transition:var(--t)}
.case-card .thumb{height:250px;background:var(--bg-soft);overflow:hidden}
.case-card .thumb svg{width:100%;height:100%}
.case-card .body{padding:26px}
.case-card h3{font-size:18px;margin-bottom:8px}
.case-card p{font-size:13.5px;color:var(--ink-500)}
.case-card .tags{margin-top:16px;display:flex;gap:8px;flex-wrap:wrap}
.tag{display:inline-block;padding:4px 12px;background:var(--blue-050);color:var(--blue-700);font-size:12px;border-radius:2px}
.tag.green{background:var(--green-100);color:var(--green-600)}
.case-card:hover{box-shadow:var(--sh-2);transform:translateY(-4px);border-color:var(--blue-200)}

/* ---------- 16. CTA 条 ---------- */
.cta{position:relative;background:linear-gradient(115deg,var(--blue-700),var(--blue-900) 62%,#0A2A4A);overflow:hidden;padding:72px 0;color:#fff}
.cta::after{content:"";position:absolute;right:-120px;top:-120px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(18,181,201,.34),transparent 66%)}
.cta-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}
.cta h2{color:#fff;font-size:30px}
.cta p{color:rgba(255,255,255,.72);margin-top:10px}
.cta .tel{font-family:Roboto,Arial,sans-serif;font-size:30px;font-weight:700;color:#fff;letter-spacing:.02em}

/* ---------- 17. 页脚 ---------- */
.footer{background:var(--blue-900);color:#8CA6C0;font-size:13.5px;padding:70px 0 0}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr auto;gap:40px;padding-bottom:52px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer h4{color:#fff;font-size:15px;margin-bottom:20px;font-weight:600}
.footer li{margin-bottom:11px}
.footer a{transition:var(--t)}
.footer a:hover{color:#fff}
.footer .f-logo{height:40px;margin-bottom:22px}
.footer .f-desc{line-height:1.9;max-width:330px;color:#7A93AC}
.footer .f-tel{margin-top:24px}
.footer .f-tel b{display:block;font-family:Roboto,Arial,sans-serif;font-size:26px;color:#fff;font-weight:700}
.qr{width:112px;height:112px;background:#fff;padding:8px;display:grid;place-items:center}
.qr img,.qr svg{width:100%;height:100%}
.footer .qr-cap{margin-top:10px;font-size:12px;text-align:center;width:112px;color:#7A93AC}
.footer-bot{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;padding:24px 0;font-size:12.5px;color:#6D869F}
.footer-bot a:hover{color:#fff}

/* ---------- 18. 表单 ---------- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.field{display:flex;flex-direction:column;gap:8px}
.field.full{grid-column:1/-1}
.field label{font-size:13px;color:var(--ink-700)}
.field label i{color:#D9534F;font-style:normal}
.field input,.field textarea,.field select{
  height:46px;padding:0 14px;border:1px solid var(--line);background:#fff;border-radius:var(--radius);
  outline:none;transition:var(--t);font-size:14px;
}
.field textarea{height:130px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--blue-600);box-shadow:0 0 0 3px var(--blue-100)}
.form-note{font-size:12.5px;color:var(--ink-300);margin-top:14px}

/* 联系方式卡 */
.contact-card{background:#fff;border:1px solid var(--line);padding:30px;transition:var(--t)}
.contact-card:hover{border-color:var(--blue-200);box-shadow:var(--sh-2)}
.contact-card .ico{width:48px;height:48px;border-radius:50%;background:var(--blue-600);color:#fff;display:grid;place-items:center;margin-bottom:18px}
.contact-card h4{font-size:16px;margin-bottom:8px}
.contact-card p{font-size:14px;color:var(--ink-500);line-height:1.9}

/* ---------- 19. 折叠问答 ---------- */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{display:flex;align-items:center;gap:16px;padding:22px 4px;cursor:pointer;font-size:15.5px;color:var(--ink-900);font-weight:500;transition:var(--t)}
.faq-q:hover{color:var(--blue-700)}
.faq-q .plus{margin-left:auto;width:22px;height:22px;position:relative;flex:none}
.faq-q .plus::before,.faq-q .plus::after{content:"";position:absolute;background:var(--blue-600);transition:var(--t)}
.faq-q .plus::before{left:0;right:0;top:10px;height:2px}
.faq-q .plus::after{top:0;bottom:0;left:10px;width:2px}
.faq-item.open .faq-q .plus::after{transform:rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .45s var(--ease)}
.faq-a p{padding:0 4px 24px;color:var(--ink-500);font-size:14px;max-width:900px}

/* ---------- 20. 动效 ---------- */
[data-reveal]{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
[data-reveal].in{opacity:1;transform:none}
[data-reveal][data-delay="1"]{transition-delay:.09s}
[data-reveal][data-delay="2"]{transition-delay:.18s}
[data-reveal][data-delay="3"]{transition-delay:.27s}
[data-reveal][data-delay="4"]{transition-delay:.36s}
[data-reveal][data-delay="5"]{transition-delay:.45s}
@media (prefers-reduced-motion:reduce){
  [data-reveal]{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}
@keyframes dash{to{stroke-dashoffset:-320}}
.float{animation:floaty 7s ease-in-out infinite}
.flow{stroke-dasharray:6 10;animation:dash 6s linear infinite}

/* 返回顶部 */
.totop{
  position:fixed;right:26px;bottom:36px;width:46px;height:46px;background:var(--blue-600);color:#fff;
  border:0;display:grid;place-items:center;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(12px);
  transition:var(--t);z-index:800;box-shadow:var(--sh-2);
}
.totop.show{opacity:1;visibility:visible;transform:none}
.totop:hover{background:var(--blue-700)}

/* ---------- 21. 占位内容标记（交付用，网址后加 ?ph=1 高亮） ---------- */
body.ph-outline [data-ph]{outline:2px dashed #F0A500;outline-offset:3px;position:relative}
body.ph-outline [data-ph]::after{
  content:attr(data-ph);position:absolute;left:0;top:-20px;background:#F0A500;color:#fff;font-size:11px;
  padding:1px 6px;white-space:nowrap;z-index:50;border-radius:2px;font-weight:400;
}
.ph-bar{background:#FFF7E6;border-bottom:1px solid #FFE1A6;color:#8A6100;font-size:12.5px;padding:8px 0;text-align:center}

/* ---------- 22. 响应式 ---------- */
@media (max-width:1180px){
  .footer-top{grid-template-columns:1fr 1fr 1fr}
  .solution-copy{padding:56px 40px}
  .split{gap:40px}
}
@media (max-width:980px){
  :root{--gut:20px;--header-h:64px}
  .section{padding:64px 0}
  .h-sec{font-size:27px}
  .nav,.header-tools .lang,.header-tools .icon-btn{display:none}
  .burger{display:block;margin-left:auto}
  /* 注意：.header 上有 backdrop-filter，会成为 fixed 子元素的包含块，
     所以移动端菜单用 absolute + 视口高度计算，不能用 fixed inset。 */
  .nav.open{
    display:block;position:absolute;top:100%;left:0;right:0;background:#fff;
    height:calc(100vh - var(--header-h));padding:12px 20px 40px;overflow-y:auto;
    border-top:1px solid var(--line);box-shadow:var(--sh-2);
  }
  .nav.open > li > a{line-height:1;padding:18px 4px;border-bottom:1px solid var(--line-soft);color:var(--ink-900)}
  .nav.open .subnav{position:static;opacity:1;visibility:visible;transform:none;border:0;box-shadow:none;padding:0 0 10px 14px}
  .g3,.g4,.g2,.eco-cards,.form-grid{grid-template-columns:1fr}
  .stats,.hero-meta ul{grid-template-columns:repeat(2,1fr)}
  .stats li{border-top:1px solid var(--line)}
  .stats li:nth-child(-n+2){border-top:0}
  .stats li:nth-child(3){border-left:0}
  .split{grid-template-columns:1fr}
  .split.rev .split-media{order:0}
  .panels{flex-direction:column;height:auto}
  .panel{border-left:0;border-top:1px solid var(--line);min-height:190px}
  .panel.on{flex:1}
  .panel .p-txt{max-height:180px;opacity:1;margin-top:12px}
  .solution-split{grid-template-columns:1fr}
  .hero{height:auto;min-height:0;max-height:none;padding:calc(var(--header-h) + 60px) 0 0}
  .hero-slide{position:relative;opacity:0;height:0;overflow:hidden}
  .hero-slide.active{height:auto;opacity:1}
  .hero-copy{padding-top:0;padding-bottom:44px}
  .hero-meta{position:static;background:rgba(0,0,0,.18)}
  .hero-meta li{padding:18px 16px}
  .hero-meta li:first-child{padding-left:16px}
  .hero-nav,.hero-dots{display:none}
  .hero-tag{height:auto;padding:8px 14px;border-radius:14px;align-items:flex-start;line-height:1.7}
  .hero-tag i{margin-top:9px}
  .pagehead{height:260px}
  .logo img{height:36px}
  .footer-top{grid-template-columns:1fr;gap:32px}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .watermark{font-size:56px}
  .news-row{flex-direction:column;gap:10px}
  .news-row .d{width:auto;text-align:left;border-right:0;display:flex;align-items:baseline;gap:8px;padding-right:0}
  .news-row .d b{font-size:22px}
  .ind-grid{grid-template-columns:repeat(2,1fr)}
  .solution-media{min-height:260px}
}

/* =====================================================================
   23. 浅色开屏 Hero（白底 + 等距科技插画，来自公司小程序素材）
   ===================================================================== */
.hero.hero-light{
  background:linear-gradient(165deg,#FAFCFF 0%,#EDF4FD 46%,#F7FAFF 100%);
  height:auto;min-height:0;max-height:none;padding-top:var(--header-h);overflow:hidden;
}
.hero-light::before,.hero-light::after{content:"";position:absolute;border-radius:50%;pointer-events:none}
.hero-light::before{width:620px;height:620px;right:-140px;top:-180px;background:radial-gradient(circle,rgba(90,160,240,.22),transparent 68%)}
.hero-light::after{width:520px;height:520px;left:-180px;bottom:-220px;background:radial-gradient(circle,rgba(18,181,201,.16),transparent 68%)}
.hero-light .hero-slide{position:absolute;inset:auto;left:0;right:0;top:0;opacity:0}
.hero-light .hero-slide.active{position:relative;opacity:1}
.hero-light .hero-inner{height:auto;padding:70px 0 40px}
.hero-light .hero-grid{display:grid;grid-template-columns:1.06fr .94fr;align-items:center;gap:48px;width:100%}
.hero-light .hero-copy{max-width:none;padding-top:0;color:var(--ink-700)}
.hero-light .hero-tag{
  border-color:var(--blue-200);background:#fff;color:var(--blue-700);box-shadow:var(--sh-1);
}
.hero-light h1{color:var(--ink-900);font-size:clamp(30px,3.6vw,50px)}
.hero-light h1 em{color:var(--blue-600)}
.hero-light .hero-sub{color:var(--ink-500)}
.hero-art{position:relative;display:grid;place-items:center}
.hero-art img{width:100%;max-width:560px;height:auto;mix-blend-mode:multiply;filter:saturate(1.06) contrast(1.02)}
.hero-light .hero-meta{
  position:relative;background:rgba(255,255,255,.72);border-top:1px solid var(--line);
  backdrop-filter:blur(10px);
}
.hero-light .hero-meta li{color:var(--ink-500);border-left-color:var(--line)}
.hero-light .hero-meta li span{color:var(--ink-900)}
.hero-light .hero-dots{position:absolute;bottom:auto;top:calc(var(--header-h) + 26px);left:50%;transform:translateX(-50%)}
.hero-light .hero-dots i{background:var(--blue-200)}
.hero-light .hero-dots i.active{background:var(--blue-600)}
.hero-light .hero-nav{bottom:auto;top:calc(var(--header-h) + 14px);right:var(--gut)}
.hero-light .hero-nav button{border-color:var(--line);background:#fff;color:var(--ink-500)}
.hero-light .hero-nav button:hover{background:var(--blue-600);color:#fff;border-color:var(--blue-600)}

/* 24. 合作品牌条 */
.brands{padding:52px 0;border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);background:#fff}
.brands .cap{text-align:center;font-size:13px;color:var(--ink-300);letter-spacing:.14em;margin-bottom:26px}
.brand-strip{overflow-x:auto;-webkit-overflow-scrolling:touch}
.brand-strip img{min-width:820px;width:100%;max-width:1120px;margin:0 auto;
  filter:grayscale(1) opacity(.62);transition:var(--t)}
.brands:hover .brand-strip img{filter:grayscale(0) opacity(1)}

/* 25. 方案库网格（24 套行业方案） */
.plan-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.plan-card{background:#fff;border:1px solid var(--line);overflow:hidden;transition:var(--t);display:block}
.plan-card:hover{border-color:var(--blue-600);box-shadow:var(--sh-2);transform:translateY(-4px)}
.plan-card .ph{height:150px;overflow:hidden;background:var(--bg-soft)}
.plan-card .ph img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.plan-card:hover .ph img{transform:scale(1.06)}
.plan-card .tx{padding:16px 18px 18px}
.plan-card .tx h4{font-size:14.5px;line-height:1.6;font-weight:600;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:46px}
.plan-card .tx span{display:inline-flex;align-items:center;gap:5px;margin-top:10px;font-size:12px;color:var(--blue-700)}

/* 26. 硬件产品线卡片 */
.prod-card{background:#fff;border:1px solid var(--line);transition:var(--t);display:flex;flex-direction:column;overflow:hidden}
.prod-card:hover{border-color:var(--blue-600);box-shadow:var(--sh-2);transform:translateY(-4px)}
.prod-card .pic{height:170px;overflow:hidden;background:linear-gradient(160deg,#F7FAFF,#E9F1FC);display:grid;place-items:center;padding:18px;border-bottom:1px solid var(--line-soft)}
.prod-card .pic img{max-height:134px;max-width:100%;width:auto;object-fit:contain;mix-blend-mode:multiply}
.prod-card .bd{padding:22px 24px 26px;flex:1;display:flex;flex-direction:column}
.prod-card h3{font-size:18px;margin-bottom:6px}
.prod-card .en{font-family:Roboto,Arial,sans-serif;font-size:11.5px;letter-spacing:.14em;color:var(--blue-500);text-transform:uppercase}
.prod-card ul{margin-top:14px;display:grid;gap:7px}
.prod-card li{font-size:13px;color:var(--ink-500);padding-left:14px;position:relative;line-height:1.7}
.prod-card li::before{content:"";position:absolute;left:0;top:10px;width:5px;height:5px;border-radius:50%;background:var(--blue-200)}
.prod-card .n{margin-top:auto;padding-top:16px;font-size:12px;color:var(--ink-300)}

/* 27. 案例：真实照片 + 分类筛选 */
.case-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .7s var(--ease)}
.case-card:hover .thumb img{transform:scale(1.05)}
.case-card .meta{display:flex;gap:10px;align-items:center;font-size:12.5px;color:var(--ink-300);margin-bottom:10px}
.case-card .meta b{color:var(--blue-700);font-weight:600}
.filter-tabs{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:36px}
.filter-tabs button{
  height:38px;padding:0 20px;border:1px solid var(--line);background:#fff;color:var(--ink-500);
  border-radius:19px;font-size:13.5px;cursor:pointer;transition:var(--t);
}
.filter-tabs button:hover{border-color:var(--blue-400);color:var(--blue-700)}
.filter-tabs button.on{background:var(--blue-600);border-color:var(--blue-600);color:#fff}
.case-card.hide{display:none}

/* 28. 联系人名片 */
.person{display:flex;gap:18px;align-items:center;background:#fff;border:1px solid var(--line);padding:24px;transition:var(--t)}
.person:hover{border-color:var(--blue-200);box-shadow:var(--sh-2)}
.person .ava{
  width:60px;height:60px;aspect-ratio:1/1;flex:none;border-radius:50%;display:grid;place-items:center;
  overflow:hidden;background:linear-gradient(140deg,var(--blue-600),var(--cyan-500));color:#fff;font-size:19px;font-weight:600;
}
.person .ava img{width:100%;height:100%;display:block;border-radius:50%;object-fit:cover}
.person h4{font-size:17px;display:flex;align-items:center;gap:10px}
.person .role{font-size:13px;color:var(--ink-500);margin:3px 0 6px}
.person .tel{font-family:Roboto,Arial,sans-serif;font-size:19px;font-weight:700;color:var(--blue-700);letter-spacing:.02em}
.person .badge{font-size:11.5px;padding:2px 10px;border-radius:10px;background:var(--green-100);color:var(--green-600);font-weight:400}
.person .badge.blue{background:var(--blue-100);color:var(--blue-700)}

@media (max-width:1180px){
  .plan-grid{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:980px){
  .hero.hero-light{padding-top:var(--header-h)}
  .hero-light .hero-grid{grid-template-columns:1fr;gap:24px}
  .hero-light .hero-inner{padding:40px 0 24px}
  .hero-light .hero-slide{position:relative;height:auto}
  .hero-light .hero-slide:not(.active){display:none}
  .hero-light .hero-copy{padding-bottom:0}
  .hero-art{order:-1}
  .hero-art img{max-width:340px}
  .hero-light .hero-dots,.hero-light .hero-nav{display:none}
  .plan-grid{grid-template-columns:repeat(2,1fr)}
  .plan-card .ph{height:120px}
  .plan-card .tx h4{font-size:13px;min-height:0}
  .brand-strip img{min-width:700px}
  .person{flex-direction:column;text-align:center}
}

/* =====================================================================
   29. 技术资料下载页
   ===================================================================== */
.doc-sub{
  display:flex;align-items:center;gap:12px;font-size:16px;margin:40px 0 18px;
  padding-bottom:12px;border-bottom:1px solid var(--line);
}
.doc-sub::before{content:"";width:4px;height:15px;background:var(--blue-600);border-radius:2px}
.doc-sub em{font-style:normal;font-size:12.5px;color:var(--ink-300);font-weight:400}
.doc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.doc-card{
  position:relative;display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  transition:var(--t);overflow:hidden;
}
.doc-card:hover{border-color:var(--blue-600);box-shadow:var(--sh-2);transform:translateY(-4px)}
.doc-thumb{
  height:150px;background:linear-gradient(160deg,#FAFCFF,#EEF5FF);display:grid;place-items:center;
  padding:16px;border-bottom:1px solid var(--line-soft);overflow:hidden;
}
.doc-thumb img{max-height:118px;max-width:100%;width:auto;object-fit:contain;mix-blend-mode:multiply;transition:transform .5s var(--ease)}
.doc-card:hover .doc-thumb img{transform:scale(1.05)}
.doc-info{padding:16px 18px 18px;flex:1}
.doc-info h4{
  font-size:14.5px;line-height:1.55;font-weight:600;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.doc-info p{
  margin-top:7px;font-size:12.5px;color:var(--ink-500);line-height:1.6;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.doc-dl{
  position:absolute;right:14px;bottom:14px;width:30px;height:30px;border-radius:50%;
  background:var(--blue-050);color:var(--blue-600);display:grid;place-items:center;transition:var(--t);
}
.doc-card:hover .doc-dl{background:var(--blue-600);color:#fff}
.doc-type{
  position:absolute;left:0;top:0;background:rgba(255,255,255,.92);color:var(--ink-500);
  font-family:Roboto,Arial,sans-serif;font-size:10.5px;letter-spacing:.1em;padding:3px 9px;
  border-right:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);
}

/* 小程序码面板 */
.qr-panel{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;
  background:linear-gradient(160deg,#FAFCFF,#EDF4FD);border:1px solid var(--line);padding:48px 30px;min-height:420px;
}
.qr-big{
  width:210px;height:210px;background:#fff;padding:14px;border:1px solid var(--line);
  box-shadow:var(--sh-2);display:grid;place-items:center;
}
.qr-big img,.qr-big svg{width:100%;height:100%;object-fit:contain}
.qr-txt{text-align:center}
.qr-txt b{display:block;font-size:16px;color:var(--ink-900)}
.qr-txt span{display:block;margin-top:6px;font-size:13px;color:var(--ink-500)}
/* 页脚双二维码 */
.qr-pair{display:flex;gap:18px}
.qr-pair .qr-item{text-align:center}

@media (max-width:1180px){
  .doc-grid{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:980px){
  .doc-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .doc-thumb{height:118px;padding:12px}
  .doc-thumb img{max-height:92px}
  .doc-info{padding:13px 14px 16px}
  .doc-info h4{font-size:13.5px}
  .qr-panel{min-height:0;padding:34px 20px}
  .qr-big{width:180px;height:180px}
}