/* ============================================================
   软谷科技官网 · 浅色科技版 全局样式
   变量定义 + 通用组件 + 各页面模块
   ============================================================ */

:root{
  --bg:#f5f8fd;
  --bg2:#eef3fb;
  --card:#ffffff;
  --line:#e3e9f2;
  --text:#0f172a;
  --muted:#5b6b85;
  --brand:#1e7bff;
  --brand2:#00b8d9;
  --grad:linear-gradient(135deg,#1e7bff,#00c6ff);
  --r:16px;
  --max:1200px;
  --shadow:0 10px 30px rgba(15,23,42,.08);
  --shadow-lg:0 24px 60px rgba(15,23,42,.12);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.75;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.35}
p{margin:0}
.container{max-width:var(--max);margin:0 auto;padding:0 24px}

/* ============ 顶部导航（白色毛玻璃、吸顶） ============ */
.nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:19px;color:var(--text)}
.logo img{height:36px;width:auto;display:block}
.menu{display:flex;align-items:center;gap:2px}
.menu>li{position:relative}
.menu>li>a{display:block;padding:10px 14px;border-radius:9px;font-size:15px;color:var(--muted);transition:.2s}
.menu>li>a:hover,.menu>li>a.on{color:var(--brand);background:rgba(30,123,255,.08)}
.sub{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(12px);min-width:280px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:8px;opacity:0;visibility:hidden;transition:.22s;box-shadow:var(--shadow-lg)}
.menu>li:hover .sub{opacity:1;visibility:visible;transform:translateX(-50%) translateY(4px)}
.sub a{display:block;padding:9px 12px;border-radius:8px;font-size:14px;color:var(--muted)}
.sub a:hover{color:var(--brand);background:rgba(30,123,255,.08)}
.nav-cta{display:flex;align-items:center;gap:12px}
.tel{font-size:14px;color:var(--muted)}
.tel b{color:var(--brand);font-size:16px;font-weight:700}
/* 移动端汉堡按钮 */
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:2px;background:var(--text);border-radius:2px;transition:.2s}

/* ============ 通用区块 ============ */
.sec{padding:88px 0}
.sec-alt{background:var(--bg2)}
.sec-head{text-align:center;max-width:800px;margin:0 auto 52px}
.sec-head h2{font-size:34px;margin:0 0 14px;letter-spacing:-.5px;font-weight:700}
.sec-head p{color:var(--muted);font-size:16px;margin:0}
.eyebrow{display:inline-block;font-size:12px;letter-spacing:3px;color:var(--brand2);margin-bottom:14px;font-weight:600}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;border-radius:12px;font-size:15px;font-weight:600;transition:.22s;border:1px solid transparent;cursor:pointer}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 12px 30px rgba(30,123,255,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 42px rgba(30,123,255,.45)}
.btn-ghost{border-color:var(--line);background:#fff;color:var(--text)}
.btn-ghost:hover{border-color:var(--brand);background:rgba(30,123,255,.06);color:var(--brand)}
.btns{display:flex;gap:14px;flex-wrap:wrap}
.phone-only{display:none}

/* ============ Hero（浅蓝径向光晕） ============ */
.hero{position:relative;overflow:hidden;padding:110px 0 92px;text-align:center;background:var(--bg)}
.hero::before{content:"";position:absolute;top:-360px;left:50%;transform:translateX(-50%);width:1200px;height:800px;background:radial-gradient(circle at 50% 45%,rgba(30,123,255,.16),rgba(0,198,255,.06) 55%,transparent 68%);pointer-events:none}
.hero::after{content:"";position:absolute;bottom:-1px;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(30,123,255,.35),transparent)}
.hero h1{position:relative;font-size:52px;line-height:1.22;margin:0 0 22px;letter-spacing:-1.2px;font-weight:800}
.hero h1 span{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{position:relative;font-size:18px;color:var(--muted);max-width:740px;margin:0 auto 36px}
.tags{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:44px;position:relative}
.tag{padding:7px 16px;border-radius:999px;border:1px solid var(--line);background:#fff;font-size:13px;color:var(--muted)}

/* ============ 卡片网格 ============ */
.grid{display:grid;gap:20px}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:28px;transition:.25s;position:relative;overflow:hidden;display:block;box-shadow:var(--shadow)}
.card:hover{transform:translateY(-4px);border-color:var(--brand2);box-shadow:0 18px 42px rgba(15,23,42,.12)}
.num{width:44px;height:44px;border-radius:12px;background:var(--grad);display:grid;place-items:center;font-weight:800;font-size:15px;color:#fff;margin-bottom:18px;letter-spacing:.5px}
.card h3{font-size:17px;margin:0 0 10px;font-weight:700;color:var(--text)}
.card p{margin:0;font-size:14px;color:var(--muted);position:relative;line-height:1.75}
.card .more{display:inline-block;margin-top:16px;font-size:13px;color:var(--brand);position:relative;font-weight:600}

/* ============ 能力数据 ============ */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:8px}
.stat{background:var(--card);border:1px solid var(--line);padding:32px 20px;text-align:center;border-radius:var(--r);box-shadow:var(--shadow)}
.stat b{display:block;font-size:30px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:8px}
.stat span{font-size:14px;color:var(--muted)}

/* ============ 解决方案 ============ */
.sol{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.sol-item{border:1px solid var(--line);border-radius:var(--r);padding:30px;background:var(--card);box-shadow:var(--shadow);transition:.25s}
.sol-item:hover{border-color:var(--brand2);transform:translateY(-4px)}
.sol-item h3{margin:0 0 10px;font-size:18px;color:var(--text)}
.sol-item p{margin:0;color:var(--muted);font-size:14px}

/* ============ CTA ============ */
.cta{text-align:center;padding:80px 40px;border-radius:24px;border:1px solid var(--line);background:linear-gradient(140deg,rgba(30,123,255,.1),rgba(0,198,255,.04));position:relative;overflow:hidden;box-shadow:var(--shadow)}
.cta h2{font-size:30px;margin:0 0 14px;color:var(--text)}
.cta p{color:var(--muted);margin:0 auto 30px;max-width:620px}

/* ============ 页脚 ============ */
.foot{border-top:1px solid var(--line);background:#fff;padding:60px 0 28px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
.foot h4{font-size:15px;margin:0 0 16px;color:var(--text)}
.foot li{margin-bottom:10px}
.foot a,.foot p{font-size:14px;color:var(--muted)}
.foot a:hover{color:var(--brand)}
.foot .desc{font-size:14px;color:var(--muted);margin-top:16px}
.qr{width:88px;height:88px;border-radius:8px;border:1px solid var(--line);margin-top:14px;display:block}
.copy{border-top:1px solid var(--line);margin-top:40px;padding-top:24px;text-align:center;font-size:13px;color:var(--muted)}

/* ============ 面包屑 ============ */
.crumb{padding:20px 0 0;font-size:13px;color:var(--muted)}
.crumb a:hover{color:var(--brand)}
.crumb a{color:var(--muted)}
.crumb span{margin:0 8px;color:#b7c2d6}

/* ============ 产品详情头部 ============ */
.phero{position:relative;overflow:hidden;padding:56px 0 64px;border-bottom:1px solid var(--line);background:var(--bg)}
.phero::before{content:"";position:absolute;top:-380px;left:50%;transform:translateX(-50%);width:1100px;height:760px;background:radial-gradient(circle at 50% 45%,rgba(30,123,255,.14),transparent 62%);pointer-events:none}
.phero-inner{position:relative;display:grid;grid-template-columns:1.35fr 1fr;gap:56px;align-items:center}
.phero h1{font-size:40px;line-height:1.25;margin:14px 0 18px;letter-spacing:-1px;font-weight:800;color:var(--text)}
.phero .lead{font-size:17px;color:var(--muted);margin:0 0 30px;max-width:620px}
.visual{border-radius:20px;border:1px solid var(--line);background:linear-gradient(150deg,rgba(30,123,255,.1),rgba(0,198,255,.04));aspect-ratio:4/3;display:grid;place-items:center;color:var(--muted);font-size:14px;box-shadow:var(--shadow)}
.visual img{width:100%;height:100%;object-fit:cover;display:block;border-radius:18px}

/* 产品详情通用 */
.sec h2{font-size:28px;margin:0 0 22px;font-weight:700;letter-spacing:-.4px;color:var(--text)}
.card h3 .dot,.dot{width:8px;height:8px;border-radius:50%;background:var(--grad);display:inline-block;margin-right:10px;vertical-align:middle}
.muted{color:var(--muted)}

/* ============ 表格 ============ */
.tw{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:#fff;box-shadow:var(--shadow)}
table{width:100%;border-collapse:collapse;font-size:14px;min-width:640px}
th,td{padding:15px 18px;text-align:left;border-bottom:1px solid var(--line)}
th{background:rgba(30,123,255,.06);font-weight:600;color:var(--text)}
tr:last-child td{border-bottom:none}
td{color:var(--muted)}
th.c{color:var(--text)}
td.y{color:var(--brand);font-weight:600}
td.n{color:#b7c2d6}

/* ============ FAQ ============ */
.faq{border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:#fff;box-shadow:var(--shadow)}
.faq details{border-bottom:1px solid var(--line)}
.faq details:last-child{border-bottom:none}
.faq summary{cursor:pointer;padding:20px 24px;font-weight:600;font-size:15px;list-style:none;position:relative;color:var(--text)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:24px;color:var(--brand);font-size:20px;font-weight:400}
.faq details[open] summary::after{content:"−"}
.faq .ans{padding:0 24px 22px;color:var(--muted);font-size:14px}

/* ============ 相关产品 ============ */
.rel{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.rel a{border:1px solid var(--line);border-radius:14px;padding:20px;background:#fff;font-size:14px;transition:.22s;color:var(--muted);box-shadow:var(--shadow)}
.rel a:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}

/* 占位说明 */
.upd{margin-top:34px;font-size:13px;color:var(--muted)}

/* 说明块 */
.note{border-left:3px solid var(--brand);background:#fff;border-radius:0 12px 12px 0;padding:20px 24px;box-shadow:var(--shadow)}
.note p{margin:0;font-size:14px;color:var(--muted)}
.note p+p{margin-top:10px}

/* ============ 代理合作页 ============ */
.benefit{border:1px solid var(--line);border-radius:var(--r);padding:26px;background:var(--card);box-shadow:var(--shadow);transition:.25s}
.benefit:hover{border-color:var(--brand2);transform:translateY(-4px)}
.benefit h3{margin:0 0 10px;font-size:17px;color:var(--text)}
.benefit p{margin:0;font-size:14px;color:var(--muted)}
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;counter-reset:s}
.step{border:1px solid var(--line);border-radius:var(--r);padding:24px 20px;background:var(--card);position:relative;box-shadow:var(--shadow)}
.step::before{counter-increment:s;content:"0" counter(s);display:block;font-size:22px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:12px}
.step h3{margin:0 0 8px;font-size:15px;color:var(--text)}
.step p{margin:0;font-size:13px;color:var(--muted)}
.cond li{position:relative;padding:12px 0 12px 26px;font-size:14px;color:var(--muted);border-bottom:1px dashed var(--line)}
.cond li:last-child{border-bottom:none}
.cond li::before{content:"";position:absolute;left:0;top:20px;width:7px;height:7px;border-radius:50%;background:var(--grad)}
.contact-box{border:1px solid var(--line);border-radius:20px;padding:40px;background:linear-gradient(140deg,rgba(30,123,255,.07),rgba(0,198,255,.03));display:grid;grid-template-columns:1.3fr 1fr;gap:40px;align-items:center;box-shadow:var(--shadow)}
.contact-box h2{margin:0 0 14px;font-size:26px;color:var(--text)}
.contact-box p{margin:0 0 8px;color:var(--muted);font-size:15px}
.contact-box .big{font-size:28px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;letter-spacing:.5px}
.contact-box .big.sm{font-size:20px}

/* ============ 文章列表页 ============ */
.posts{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.post{border:1px solid var(--line);border-radius:var(--r);padding:26px;background:#fff;box-shadow:var(--shadow);transition:.25s;display:flex;flex-direction:column}
.post:hover{transform:translateY(-4px);border-color:var(--brand2)}
.post h3{font-size:16px;margin:0 0 10px;font-weight:700}
.post h3 a{color:var(--text)}.post h3 a:hover{color:var(--brand)}
.post .meta{font-size:12px;color:var(--muted);margin-bottom:12px;display:flex;gap:14px;flex-wrap:wrap}
.post .meta b{color:var(--brand);font-weight:600}
.post .desc{font-size:14px;color:var(--muted);flex:1}
.pager{display:flex;gap:8px;justify-content:center;margin-top:36px;flex-wrap:wrap}
.pager a,.pager span{min-width:40px;height:40px;padding:0 14px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--text);display:inline-flex;align-items:center;justify-content:center;font-size:14px;transition:.2s}
.pager a:hover{border-color:var(--brand);color:var(--brand)}
.pager a.on{background:var(--grad);color:#fff;border-color:transparent}
.pager span.dis{pointer-events:none;opacity:.45}

/* 首页相关资讯列表 */
.home-posts{display:grid;grid-template-columns:repeat(2,1fr);gap:10px 34px;margin-top:4px;text-align:left}
.hpost{display:block;padding:16px 0;border-bottom:1px solid var(--line);text-decoration:none;transition:.2s}
.hpost .d{display:block;font-size:12px;color:var(--brand2);letter-spacing:1px;font-weight:600;margin-bottom:8px}
.hpost .t{display:block;font-size:16px;font-weight:700;color:var(--text);line-height:1.5;transition:.2s}
.hpost p{margin:6px 0 0;font-size:13px;color:var(--muted);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.hpost:hover .t{color:var(--brand)}

/* ============ 文章详情页 ============ */
.article-wrap{max-width:820px;margin:0 auto}
.article-head{border-bottom:1px solid var(--line);padding:40px 0 30px}
.article-head h1{font-size:34px;font-weight:800;margin:14px 0 18px}
.article-head .meta{font-size:14px;color:var(--muted);display:flex;gap:18px;flex-wrap:wrap}
.article-head .meta b{color:var(--brand);font-weight:600}
.article-body{padding:36px 0}
.article-body h2{font-size:22px;margin:34px 0 14px}
.article-body h3{font-size:18px;margin:24px 0 10px}
.article-body p{font-size:16px;color:var(--text);margin:0 0 16px;line-height:1.9}
.article-body .key{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px 26px;margin:20px 0}
.article-body .key h3{margin:0 0 12px;font-size:16px;color:var(--text)}
.article-body .key li{position:relative;list-style:none;padding:6px 0 6px 22px;color:var(--muted);font-size:15px}
.article-body .key li::before{content:"";position:absolute;left:0;top:15px;width:7px;height:7px;border-radius:50%;background:var(--grad)}
.article-src{font-size:13px;color:var(--muted);margin-top:10px}

/* ============ 关于 / 联系 ============ */
.info-row{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.mapbox{border:1px solid var(--line);border-radius:var(--r);background:linear-gradient(150deg,rgba(30,123,255,.08),rgba(0,198,255,.03));aspect-ratio:16/9;display:grid;place-items:center;color:var(--muted);font-size:14px;box-shadow:var(--shadow)}
.contact-lines li{display:flex;gap:12px;padding:14px 0;border-bottom:1px solid var(--line);font-size:15px;color:var(--text)}
.contact-lines li:last-child{border-bottom:none}
.contact-lines .k{color:var(--muted);min-width:70px;flex-shrink:0}
.contact-lines b{color:var(--brand)}

/* ============ 合作案例 ============ */
.customers{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.customer{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:24px 18px;display:flex;flex-direction:column;align-items:center;gap:14px;box-shadow:var(--shadow);transition:.22s}
.customer:hover{border-color:var(--brand2);transform:translateY(-4px)}
.customer .cw{width:92px;height:92px;border-radius:14px;display:flex;align-items:center;justify-content:center;overflow:hidden;padding:12px}
.customer .cw img{width:100%;height:100%;object-fit:contain}
.customer .nm{font-size:13px;color:var(--muted);text-align:center;line-height:1.5}

/* ============ 404 ============ */
.nf{padding:120px 0;text-align:center}
.nf .code{font-size:110px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1;margin-bottom:10px}
.nf h1{font-size:28px;margin-bottom:14px}
.nf p{color:var(--muted);margin-bottom:32px}

/* ============ 响应式 ============ */
@media(max-width:1000px){
  .g3,.sol,.posts{grid-template-columns:repeat(2,1fr)}
  .g4,.rel,.plans,.customers{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:repeat(2,1fr)}
  .contact-box{grid-template-columns:1fr;gap:24px}
  .info-row{grid-template-columns:1fr}
  .hero h1{font-size:36px}.hero .lead{font-size:16px}
  .sec{padding:64px 0}.sec-head h2{font-size:26px}
  .phero-inner{grid-template-columns:1fr;gap:34px}
  .phero h1{font-size:30px}
}
@media(max-width:680px){
  .nav-toggle{display:flex}
  .menu{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:12px 16px;gap:4px;box-shadow:var(--shadow-lg)}
  .menu.open{display:flex}
  .menu>li>a{padding:12px 14px}
  .sub{position:static;transform:none;min-width:0;opacity:1;visibility:visible;box-shadow:none;border:none;padding:0 0 0 12px;display:none}
  .menu>li:hover .sub{display:block;transform:none}
  .nav-cta,.tel{display:none}
  .phone-only{display:flex}
  .visual{display:none}
  .g3,.g4,.sol,.posts,.home-posts,.rel,.plans,.stats,.steps,.foot-grid,.customers{grid-template-columns:1fr}
  .hero h1{font-size:29px}.sec{padding:52px 0}
  .article-head h1{font-size:26px}
  .cta{padding:52px 22px}
}