/* ===========================================================
   西安求是元电子技术有限公司 — 官网样式
   设计基线：深空蓝黑 #0A1424 × 中国红 #C8102E × 赤金 #E9B949 × 暖白 #FFF8F0
   =========================================================== */

:root{
  --ink:#0C2340;        /* 深蓝：页脚 / CTA 压底用 */
  --ink-2:#123A63;
  --ink-3:#1B4E85;
  --blue:#1668DC;       /* 科技蓝主色 */
  --blue-deep:#0E4DA8;
  --blue-soft:#DCE9FA;
  --bg:#E7EDF6;         /* 页面底色（冷调蓝灰，加深版） */
  --panel:#D9E4F3;      /* 区块底（替代原深色区，加深版） */
  --gold-deep:#9A7318;  /* 浅底上的金（提高对比） */
  --red:#C8102E;
  --red-deep:#9E0C24;
  --gold:#E9B949;
  --gold-soft:#F5D98A;
  --warm:#EEF3FA;
  --paper:#FFFFFF;
  --line:#D3DEEC;
  --line-dark:rgba(255,255,255,.14);
  --text:#1B2735;
  --text-2:#41505F;
  --muted:#6B7B8D;
  --ok:#1E8E5A;

  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  --font-mono:"JetBrains Mono","Consolas","Courier New",monospace;

  --wrap:1200px;
  --r:10px;
  --shadow:0 10px 30px rgba(10,20,36,.08);
  --shadow-lg:0 22px 60px rgba(10,20,36,.16);
  --nav-h:72px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  color:var(--text);
  background:var(--bg);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  font-size:16px;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--font-serif);font-weight:700;line-height:1.35;margin:0}
p{margin:0}
ul{margin:0;padding:0;list-style:none}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 28px}
.muted{color:var(--muted)}
.center{text-align:center}

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 30px;border-radius:var(--r);
  font-size:15px;font-weight:600;letter-spacing:.02em;
  transition:all .22s ease;border:1px solid transparent;cursor:pointer;
}
.btn-primary{background:var(--red);color:#fff;box-shadow:0 8px 20px rgba(200,16,46,.24)}
.btn-primary:hover{background:var(--red-deep);transform:translateY(-2px);box-shadow:0 12px 28px rgba(200,16,46,.3)}
.btn-ghost{border-color:rgba(22,104,220,.35);color:var(--blue-deep);background:#fff}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold);transform:translateY(-2px)}
.btn-gold{background:var(--gold);color:var(--ink)}
.btn-gold:hover{background:#d9a53a;transform:translateY(-2px)}

/* ---------- 顶部导航 ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;height:var(--nav-h);z-index:100;
  background:rgba(255,255,255,.92);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:background .25s ease;
}
.nav.scrolled{background:rgba(255,255,255,.98);box-shadow:0 4px 20px rgba(16,35,64,.10)}
.nav-in{max-width:var(--wrap);margin:0 auto;padding:0 28px;height:100%;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px;color:var(--text)}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;border-radius:8px;
  background:linear-gradient(140deg,var(--red),var(--red-deep));
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-serif);font-weight:700;font-size:18px;color:var(--text);
  box-shadow:0 4px 14px rgba(200,16,46,.4);
}
.brand-logo{height:40px;width:auto;display:block;flex:0 0 auto}
.f-brand .brand-logo{height:46px;margin-bottom:4px}
@media(max-width:768px){.brand-logo{height:32px}.f-brand .brand-logo{height:38px}}
.brand-txt{display:flex;flex-direction:column;line-height:1.2}
.brand-cn{font-family:var(--font-serif);font-size:17px;font-weight:700;letter-spacing:.04em}
.brand-en{font-size:11px;color:var(--gold-soft);letter-spacing:.12em;text-transform:uppercase}

.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
  padding:9px 15px;border-radius:6px;font-size:15px;color:var(--text-2);
  transition:all .18s ease;position:relative;
}
.nav-links a:hover{color:var(--blue);background:rgba(22,104,220,.07)}
.nav-links a.active{color:var(--blue)}
.nav-links a.active::after{
  content:"";position:absolute;left:15px;right:15px;bottom:2px;height:2px;background:var(--gold);border-radius:2px;
}
.nav-cta{padding:9px 20px !important;background:var(--red);color:#fff !important;border-radius:6px;font-weight:600}
.nav-cta:hover{background:var(--red-deep) !important}

.burger{display:none;background:none;border:0;color:var(--text);font-size:24px;cursor:pointer;padding:6px}

/* ---------- 页首横幅（内页） ---------- */
.page-hero{
  margin-top:var(--nav-h);
  background:linear-gradient(135deg,#D8E7FA 0%,#F0F5FC 60%);
  background-image:
    radial-gradient(900px 380px at 78% -10%,rgba(200,16,46,.13),transparent 62%),
    radial-gradient(700px 340px at 8% 110%,rgba(22,104,220,.12),transparent 60%);
  padding:78px 0 74px;color:var(--text);position:relative;overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(22,104,220,.35),transparent);
}
.page-hero h1{font-size:38px;margin-bottom:14px;letter-spacing:.02em}
.page-hero .sub{color:var(--text-2);font-size:16px;max-width:640px}
.crumb{font-size:13px;color:var(--muted);margin-bottom:18px;letter-spacing:.04em}
.crumb a:hover{color:var(--blue)}

/* ---------- 分区通用 ---------- */
.sec{padding:88px 0}
.sec-alt{background:var(--warm)}
.sec-dark{background:var(--panel);color:var(--text)}
.sec-head{max-width:720px;margin-bottom:52px}
.sec-head.center{margin-left:auto;margin-right:auto}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.22em;text-transform:uppercase;
  color:var(--red);font-weight:700;margin-bottom:14px;
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--red)}
.sec-dark .eyebrow{color:var(--blue-deep)}
.sec-dark .eyebrow::before{background:var(--blue-deep)}
.sec-head h2{font-size:32px;margin-bottom:16px}
.sec-head p{color:var(--text-2);font-size:16px}
.sec-dark .sec-head p{color:var(--text-2)}

/* ---------- 首页 Hero ---------- */
.hero{
  margin-top:var(--nav-h);min-height:640px;
  background:linear-gradient(135deg,#D9E7FA 0%,#EEF4FD 55%,#DCE9F9 100%);
  color:var(--text);position:relative;overflow:hidden;
  display:flex;align-items:center;
}
.hero-bg{position:absolute;inset:0;
  background-image:
    radial-gradient(1000px 520px at 74% 8%,rgba(200,16,46,.15),transparent 60%),
    radial-gradient(760px 420px at 4% 96%,rgba(22,104,220,.13),transparent 62%);
}
.hero-grid{
  position:absolute;inset:0;opacity:.55;
  background-image:linear-gradient(rgba(22,104,220,.18) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(22,104,220,.18) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(circle at 50% 40%,#000 20%,transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 40%,#000 20%,transparent 78%);
}
.hero-in{position:relative;z-index:2;width:100%;padding:96px 0 84px}
.hero h1{font-size:52px;line-height:1.28;margin-bottom:22px;letter-spacing:.01em}
.hero h1 .hl{
  color:var(--blue);position:relative;
}
.hero .lead{font-size:17.5px;color:var(--text-2);max-width:670px;margin-bottom:34px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:56px}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.stat{background:#fff;padding:22px 20px}
.stat b{display:block;font-family:var(--font-serif);font-size:30px;color:var(--gold);line-height:1.2}
.stat span{font-size:13px;color:var(--muted);letter-spacing:.03em}

/* ---------- 卡片 ---------- */
.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)}

.card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--r);
  padding:30px 28px;transition:all .24s ease;height:100%;
}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:rgba(200,16,46,.3)}
.card-link{display:flex;flex-direction:column;text-decoration:none;color:inherit;transition:transform .25s ease,box-shadow .25s ease;border-radius:var(--r)}
.card-link:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.card-link:hover .card{border-color:rgba(22,104,220,.4)}
.card-link .card{height:auto;flex:1 1 auto}
.card-link .more{color:var(--blue);font-size:13.5px;font-weight:600;letter-spacing:.03em;margin-top:14px;display:inline-block;align-self:flex-start;flex:none}
.pd-cols{display:grid;grid-template-columns:.92fr 1.08fr;gap:46px;align-items:start}
.pd-img{width:100%;border-radius:12px;border:1px solid var(--line);background:#fff;padding:16px;display:block}
.pd-thumbs{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:14px}
.pd-thumbs img{width:100%;border-radius:8px;border:1px solid var(--line);background:#fff;padding:8px;display:block}
.pd-apps{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.pd-app{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:16px 18px;font-size:14.5px;color:var(--text-2)}
.pd-nav{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:14px}
.pd-rel{display:flex;align-items:center;justify-content:space-between;gap:10px;background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:15px 18px;text-decoration:none;color:var(--text);font-size:14.5px;transition:border-color .2s,color .2s}
.pd-rel:hover{border-color:var(--blue);color:var(--blue)}
.pd-rel em{font-style:normal;color:var(--blue)}
.pd-note{font-size:12.5px;color:var(--muted);margin-top:12px}
table th{text-align:left}
@media(max-width:900px){.pd-cols{grid-template-columns:1fr}}
.card .card-img{width:100%;height:190px;object-fit:cover;border-radius:10px;margin-bottom:16px;display:block;border:1px solid var(--line)}
.card .card-img-fit{width:100%;height:190px;object-fit:contain;border-radius:10px;margin-bottom:16px;display:block;background:#fff;border:1px solid var(--line);padding:10px}
.hero-cols{display:grid;grid-template-columns:1.15fr .85fr;gap:52px;align-items:center}
.hero-visual{position:relative}
.hero-visual img{width:100%;border-radius:14px;box-shadow:var(--shadow-lg);border:1px solid rgba(255,255,255,.65);display:block}
.hero-visual .cap{position:absolute;left:14px;bottom:14px;background:rgba(12,35,64,.82);color:#fff;font-size:12.5px;padding:8px 14px;border-radius:8px;letter-spacing:.03em;backdrop-filter:blur(4px)}
.card .ico{
  width:48px;height:48px;border-radius:10px;margin-bottom:18px;
  background:linear-gradient(140deg,rgba(200,16,46,.1),rgba(233,185,73,.16));
  display:flex;align-items:center;justify-content:center;font-size:22px;
}
.card h3{font-size:19px;margin-bottom:10px}
.card p{color:var(--text-2);font-size:14.5px}

.card-dark{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:28px 26px;transition:all .24s ease}
.card-dark:hover{background:#fff;border-color:rgba(22,104,220,.45);box-shadow:var(--shadow);transform:translateY(-4px)}
.card-dark h3{font-size:18px;margin-bottom:10px;color:var(--text)}
.card-dark p{color:var(--text-2);font-size:14.5px}
.card-dark .tag{
  display:inline-block;font-size:11px;letter-spacing:.1em;color:var(--blue-deep);
  border:1px solid rgba(22,104,220,.35);border-radius:20px;padding:3px 11px;margin-bottom:14px;
}

/* ---------- 技术栈时间线 ---------- */
.timeline{position:relative;padding-left:34px}
.timeline::before{content:"";position:absolute;left:9px;top:8px;bottom:8px;width:2px;background:linear-gradient(180deg,var(--red),var(--gold))}
.tl-item{position:relative;padding-bottom:34px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-30px;top:7px;width:12px;height:12px;border-radius:50%;
  background:var(--paper);border:3px solid var(--red);
}
.tl-item h4{font-size:17px;margin-bottom:6px}
.tl-item .yr{font-family:var(--font-mono);font-size:12px;color:var(--red);letter-spacing:.08em;margin-bottom:4px;display:block}
.tl-item p{color:var(--text-2);font-size:14.5px}

/* ---------- 参数表 ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:var(--paper)}
table{width:100%;border-collapse:collapse;min-width:640px;font-size:14.5px}
th,td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--line)}
th{background:var(--blue-soft);color:var(--blue-deep);font-weight:600;font-size:13.5px;letter-spacing:.04em}
td{color:var(--text-2)}
tbody tr:last-child td{border-bottom:0}
tbody tr:hover td{background:var(--warm)}
td.mono{font-family:var(--font-mono);font-size:13.5px;color:var(--ink)}

/* ---------- 产品卡 ---------- */
.prod{display:flex;flex-direction:column;background:var(--paper);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:all .24s ease}
.prod:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:rgba(200,16,46,.32)}
.prod-top{padding:26px 26px 20px;border-bottom:1px dashed var(--line)}
.prod-top .code{font-family:var(--font-mono);font-size:12px;color:var(--red);letter-spacing:.08em}
.prod-top h3{font-size:20px;margin:6px 0 8px}
.prod-top p{font-size:14px;color:var(--muted)}
.prod-body{padding:20px 26px 26px}
.prod-body li{font-size:14px;color:var(--text-2);padding:6px 0 6px 20px;position:relative}
.prod-body li::before{content:"";position:absolute;left:2px;top:15px;width:6px;height:6px;border-radius:50%;background:var(--gold)}
.status{display:inline-block;font-size:11px;padding:3px 10px;border-radius:20px;letter-spacing:.06em}
.st-done{background:rgba(30,142,90,.12);color:var(--ok)}
.st-dev{background:rgba(233,185,73,.18);color:#8A6A15}
.st-plan{background:rgba(107,123,141,.14);color:var(--muted)}

/* ---------- 流程步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative}
.step{text-align:center;padding:0 20px;position:relative}
.step .n{
  width:46px;height:46px;margin:0 auto 16px;border-radius:50%;
  background:var(--ink);color:var(--gold);font-family:var(--font-serif);font-weight:700;font-size:18px;
  display:flex;align-items:center;justify-content:center;border:2px solid rgba(233,185,73,.35);
}
.step h4{font-size:16.5px;margin-bottom:8px}
.step p{font-size:14px;color:var(--text-2)}
.step::after{content:"";position:absolute;top:23px;right:-2px;width:100%;height:1px;background:repeating-linear-gradient(90deg,var(--line) 0 6px,transparent 6px 12px)}
.step:last-child::after{display:none}

/* ---------- 合作/资质条 ---------- */
.strip{background:var(--panel);color:var(--text);padding:64px 0}
.strip h3{font-size:22px;margin-bottom:12px}
.strip p{color:var(--text-2);font-size:15px;max-width:760px}
.badge-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.badge{
  border:1px solid var(--line);border-radius:8px;padding:10px 18px;
  font-size:13.5px;color:var(--text-2);background:#fff;
}

/* ---------- 联系/表单 ---------- */
.contact-grid{display:grid;grid-template-columns:0.9fr 1.1fr;gap:48px;align-items:start}
.info-item{display:flex;gap:16px;padding:20px 0;border-bottom:1px solid var(--line)}
.info-item:last-child{border-bottom:0}
.info-item .k{
  flex:0 0 84px;font-size:13px;color:var(--muted);letter-spacing:.08em;padding-top:3px;
}
.info-item .v{font-size:15.5px;color:var(--text);line-height:1.7}
.info-item .v strong{font-weight:600}

.form-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:34px 32px;box-shadow:var(--shadow)}
.field{margin-bottom:18px}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--text);margin-bottom:7px}
.field label .req{color:var(--red);margin-left:3px}
.field input,.field textarea,.field select{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:8px;
  font-family:inherit;font-size:15px;color:var(--text);background:var(--warm);
  transition:all .18s ease;
}
.field input:focus,.field textarea:focus,.field select:focus{
  outline:none;border-color:var(--red);background:#fff;box-shadow:0 0 0 3px rgba(200,16,46,.1);
}
.field textarea{min-height:118px;resize:vertical}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-note{font-size:12.5px;color:var(--muted);margin-top:14px;line-height:1.6}
.form-msg{margin-top:16px;padding:12px 16px;border-radius:8px;font-size:14px;display:none}
.form-msg.ok{display:block;background:rgba(30,142,90,.1);color:var(--ok);border:1px solid rgba(30,142,90,.25)}
.form-msg.err{display:block;background:rgba(200,16,46,.08);color:var(--red);border:1px solid rgba(200,16,46,.22)}

/* ---------- 新闻列表 ---------- */
.news-list{display:flex;flex-direction:column;gap:0}
.news-item{
  display:grid;grid-template-columns:130px 1fr 130px;gap:28px;align-items:center;
  padding:26px 0;border-bottom:1px solid var(--line);transition:all .2s ease;
}
.news-item:hover{background:var(--warm);padding-left:12px;padding-right:12px}
.news-date{font-family:var(--font-mono);font-size:13.5px;color:var(--muted);letter-spacing:.04em}
.news-item h3{font-size:18px;margin-bottom:6px}
.news-item p{font-size:14px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.news-go{text-align:right;font-size:13.5px;color:var(--red);font-weight:600}
.news-tag{display:inline-block;font-size:11.5px;padding:2px 10px;border-radius:20px;background:rgba(200,16,46,.09);color:var(--red);margin-bottom:8px}

/* ---------- CTA ---------- */
.cta-band{
  background:linear-gradient(120deg,var(--ink) 0%,var(--ink-2) 55%,var(--ink-3) 100%);
  color:#fff;padding:76px 0;position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(200,16,46,.35),transparent 68%);
}
.cta-in{position:relative;display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}
.cta-in h2{font-size:30px;margin-bottom:10px}
.cta-in p{color:rgba(255,255,255,.66);font-size:15.5px}

/* ---------- 页脚 ---------- */
.foot{background:var(--ink);color:rgba(255,255,255,.6);padding:60px 0 26px;font-size:14px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:40px;border-bottom:1px solid var(--line-dark)}
.foot h4{font-size:15px;color:#fff;margin-bottom:16px;font-family:var(--font-sans);font-weight:600}
.foot li{padding:5px 0}
.foot li a:hover{color:var(--gold)}
.foot .f-brand p{font-size:13.5px;line-height:1.8;margin-top:14px;max-width:300px}
.foot-bot{padding-top:22px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12.5px;color:rgba(255,255,255,.42)}
.foot-bot a{color:inherit;transition:color .2s}
.foot-bot a:hover{color:#fff}

/* ---------- 动效 ---------- */
/* 滚动显现：默认【可见】，只有 JS 成功执行后才加 .hide-init 隐藏并按需显现。
   这样 main.js 加载失败 / 用户禁用 JS 时，内容不会整片空白。 */
.reveal{transition:opacity .6s ease,transform .6s ease}
.reveal.hide-init{opacity:0;transform:translateY(22px)}
.reveal.in{opacity:1;transform:none}
/* 尊重系统「减弱动态效果」偏好 */
@media(prefers-reduced-motion:reduce){
  .reveal,.reveal.hide-init{opacity:1!important;transform:none!important;transition:none}
}

/* ---------- 响应式 ---------- */
@media(max-width:1024px){.hero-cols{grid-template-columns:1fr}.hero-visual{display:none}}
@media(max-width:1024px){
  .g4{grid-template-columns:repeat(2,1fr)}
  .g3{grid-template-columns:repeat(2,1fr)}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr);gap:32px 0}
  .step::after{display:none}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:860px){
  .nav-links{
    position:fixed;top:var(--nav-h);left:0;right:0;flex-direction:column;align-items:stretch;
    background:#fff;padding:14px 20px 24px;gap:2px;
    border-bottom:1px solid var(--line);box-shadow:0 12px 28px rgba(16,35,64,.12);
    transform:translateY(-14px);opacity:0;pointer-events:none;transition:all .22s ease;
  }
  .nav-links.open{transform:none;opacity:1;pointer-events:auto}
  .nav-links a{padding:13px 10px;font-size:16px}
  .nav-links a.active::after{display:none}
  .burger{display:block}
  .hero h1{font-size:36px}
  .hero{min-height:auto}
  .hero-in{padding:70px 0 60px}
  .page-hero h1{font-size:29px}
  .sec{padding:60px 0}
  .sec-head h2{font-size:26px}
  .g2,.g3,.g4{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr;gap:36px}
  .news-item{grid-template-columns:1fr;gap:8px}
  .news-go{text-align:left}
  .cta-in{flex-direction:column;align-items:flex-start}
  .foot-grid{grid-template-columns:1fr}
  .field-row{grid-template-columns:1fr}
  .wrap{padding:0 20px}
  .nav-in{padding:0 20px}
}

/* ---- 软件截图画廊 ---- */
.shot-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.theme-toggle{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:28px}
.tt-label{font-size:14px;font-weight:600;color:var(--text)}
.tt-seg{display:inline-flex;background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:4px}
.tt-btn{border:0;background:transparent;color:var(--text-2);font-size:13.5px;font-weight:600;padding:7px 18px;border-radius:999px;cursor:pointer;transition:all .2s}
.tt-btn.is-active{background:var(--blue);color:#fff;box-shadow:0 2px 8px rgba(22,104,220,.3)}
.tt-hint{font-size:12.5px;color:var(--muted)}

.shot{margin:0;background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:14px;transition:all .24s ease}
.shot:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.shot img{width:100%;border-radius:8px;border:1px solid var(--line);display:block}
/* 浅色主题改用真实截图(swl-*)，无需滤镜与示意标 */
.shot figcaption{font-size:13.5px;color:var(--text);margin-top:10px;font-weight:600;letter-spacing:.02em}
.shot figcaption em{display:block;font-style:normal;font-weight:400;font-size:12.5px;color:var(--muted);margin-top:4px;line-height:1.7}
@media(max-width:860px){.shot-grid{grid-template-columns:1fr}}
/* ---- 测控软件产品横幅 ---- */
.sw-feature{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center;background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:26px;text-decoration:none;color:inherit;transition:all .24s ease}
.sw-feature:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(22,104,220,.4)}
.sw-shot img{width:100%;border-radius:10px;border:1px solid var(--line);display:block;background:#0d1520}
.sw-info h3{font-size:21px;margin-bottom:10px}
.sw-info p{color:var(--text-2);font-size:14.5px;line-height:1.9}
.sw-points{margin:14px 0 4px;padding-left:18px;font-size:13.5px;color:var(--text-2);line-height:2.05}
.sw-points li::marker{color:var(--blue)}
@media(max-width:860px){.sw-feature{grid-template-columns:1fr;gap:20px}}