/* ============================================================
   长沙兵推科技有限公司 官网样式  style.css
   响应式：桌面 / 平板 / 手机
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root{
  --navy:#0a1f3c;          /* 深海军蓝 主色 */
  --navy-2:#0d2a52;
  --blue:#1d6fe0;          /* 科技蓝 */
  --blue-light:#3b8cff;
  --red:#c0392b;           /* 军事红 强调 */
  --ink:#1f2937;           /* 正文 */
  --ink-soft:#475569;      /* 次要文字 */
  --line:#e5e9f0;          /* 分割线 */
  --bg:#ffffff;
  --bg-alt:#f5f8fc;        /* 交替背景 */
  --bg-soft:#eef3fb;
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 10px 30px rgba(10,31,60,.08);
  --shadow-lg:0 18px 50px rgba(10,31,60,.14);
  --maxw:1200px;
  --header-h:72px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 重置 ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Helvetica,Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.75;
  font-size:16px;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:13px 30px;border-radius:40px;font-size:15px;font-weight:600;
  letter-spacing:.5px;transition:all .25s var(--ease);white-space:nowrap;
}
.btn-primary{background:linear-gradient(135deg,var(--blue),var(--blue-light));color:#fff;box-shadow:0 8px 22px rgba(29,111,224,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(29,111,224,.45)}
.btn-ghost{background:rgba(255,255,255,.12);color:#fff;border:1.5px solid rgba(255,255,255,.55)}
.btn-ghost:hover{background:rgba(255,255,255,.22);border-color:#fff}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  height:var(--header-h);background:rgba(255,255,255,.0);
  transition:background .35s var(--ease),box-shadow .35s var(--ease),height .35s var(--ease);
}
.site-header.scrolled{
  background:rgba(255,255,255,.96);
  box-shadow:0 2px 18px rgba(10,31,60,.08);
  backdrop-filter:saturate(180%) blur(10px);
  -webkit-backdrop-filter:saturate(180%) blur(10px);
}
.nav-bar{display:flex;align-items:center;justify-content:space-between;height:100%}
.brand{display:flex;align-items:center;gap:10px}
.brand-logo{height:42px;width:auto;transition:height .35s var(--ease)}
.site-header.scrolled .brand-logo{height:38px}
.nav-menu{display:flex;align-items:center;gap:6px}
.nav-link{
  position:relative;padding:8px 16px;font-size:15px;font-weight:500;color:#fff;
  border-radius:8px;transition:color .25s var(--ease),background .25s var(--ease);
}
.site-header.scrolled .nav-link{color:var(--ink)}
.nav-link:hover{color:var(--blue-light)}
.nav-link.active{color:var(--blue-light)}
.nav-link.active::after{
  content:"";position:absolute;left:16px;right:16px;bottom:2px;height:2px;
  background:linear-gradient(90deg,var(--blue),var(--blue-light));border-radius:2px;
}
.site-header.scrolled .nav-link.active{color:var(--blue)}

/* 汉堡菜单按钮 */
.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px}
.nav-toggle span{display:block;width:24px;height:2px;background:#fff;border-radius:2px;transition:all .3s var(--ease)}
.site-header.scrolled .nav-toggle span{background:var(--ink)}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Hero 首屏 ---------- */
.hero{
  position:relative;min-height:100vh;display:flex;flex-direction:column;justify-content:center;
  padding:calc(var(--header-h) + 40px) 0 60px;
  background:radial-gradient(1200px 600px at 80% -10%,#16407a 0%,transparent 60%),
             radial-gradient(900px 500px at 0% 110%,#0d2a52 0%,transparent 55%),
             linear-gradient(160deg,#0a1f3c 0%,#0d2a52 55%,#091a36 100%);
  color:#fff;overflow:hidden;
}
.hero-overlay{
  position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(120,170,255,.08) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(120,170,255,.08) 1px,transparent 1px);
  background-size:48px 48px;
  mask-image:radial-gradient(ellipse 80% 70% at 50% 40%,#000 30%,transparent 80%);
  -webkit-mask-image:radial-gradient(ellipse 80% 70% at 50% 40%,#000 30%,transparent 80%);
}
.hero-content{position:relative;z-index:2;max-width:820px}
.hero-eyebrow{
  display:inline-block;font-size:14px;letter-spacing:3px;color:#7fb4ff;
  border:1px solid rgba(127,180,255,.4);border-radius:30px;padding:6px 18px;margin-bottom:24px;
  background:rgba(127,180,255,.08);
}
.hero-title{font-size:clamp(30px,5vw,58px);line-height:1.25;font-weight:800;letter-spacing:1px;margin-bottom:24px;white-space:pre-line}
.hero-title br{display:block}
.hero-desc{font-size:clamp(15px,1.6vw,18px);color:rgba(255,255,255,.82);max-width:680px;margin-bottom:36px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.hero-stats{
  position:relative;z-index:2;display:flex;gap:40px;margin-top:60px;flex-wrap:wrap;
  padding-top:32px;border-top:1px solid rgba(255,255,255,.12);
}
.stat{display:flex;flex-direction:column}
.stat-num{font-size:clamp(24px,3vw,38px);font-weight:800;color:#fff;line-height:1.2}
.stat-label{font-size:14px;color:rgba(255,255,255,.65);margin-top:4px}

/* ---------- 通用板块 ---------- */
.section{padding:90px 0}
.section-alt{background:var(--bg-alt)}
.section-head{text-align:center;max-width:720px;margin:0 auto 56px}
.section-tag{
  display:inline-block;font-size:13px;letter-spacing:3px;color:var(--blue);font-weight:700;
  padding:5px 14px;background:var(--bg-soft);border-radius:20px;margin-bottom:16px;
}
.section-title{font-size:clamp(26px,3.4vw,38px);font-weight:800;color:var(--navy);letter-spacing:1px}
.section-sub{font-size:16px;color:var(--ink-soft);margin-top:10px}

/* ---------- 关于我们 ---------- */
.about-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:start}
.about-text p{color:var(--ink-soft);margin-bottom:18px;font-size:16px}
.about-text strong{color:var(--navy);font-weight:700}
.about-cards{display:flex;flex-direction:column;gap:18px}
.about-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 26px;
  box-shadow:var(--shadow);transition:transform .3s var(--ease),box-shadow .3s var(--ease);
  display:flex;flex-direction:column;
}
.about-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.about-card-icon{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;margin-bottom:12px;
  font-size:20px;font-weight:800;color:#fff;background:linear-gradient(135deg,var(--blue),var(--navy-2));
}
.about-card h3{font-size:18px;color:var(--navy);margin-bottom:6px}
.about-card p{font-size:14px;color:var(--ink-soft);line-height:1.7}

/* ---------- 核心业务卡片 ---------- */
.biz-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.biz-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px 28px;
  box-shadow:var(--shadow);position:relative;overflow:hidden;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.biz-card-link{display:block;color:inherit;text-decoration:none;cursor:pointer}
.biz-card-link:focus-visible{outline:3px solid rgba(30,111,217,.28);outline-offset:4px}
.biz-card-link .card-link{display:inline-flex;align-items:center;gap:5px;margin-top:18px;color:var(--blue);font-weight:700}
.biz-card-link:hover .card-link svg{transform:translateX(3px)}
.biz-card-link .card-link svg{transition:transform .2s var(--ease)}
.biz-card::before{
  content:"";position:absolute;left:0;top:0;height:4px;width:100%;
  background:linear-gradient(90deg,var(--blue),var(--blue-light));transform:scaleX(0);transform-origin:left;
  transition:transform .35s var(--ease);
}
.biz-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.biz-card:hover::before{transform:scaleX(1)}
.biz-icon{
  width:60px;height:60px;border-radius:14px;display:grid;place-items:center;margin-bottom:20px;
  color:var(--blue);background:var(--bg-soft);transition:all .3s var(--ease);
}
.biz-card:hover .biz-icon{background:linear-gradient(135deg,var(--blue),var(--navy-2));color:#fff}
.biz-card h3{font-size:19px;color:var(--navy);margin-bottom:10px;font-weight:700}
.biz-card p{font-size:14.5px;color:var(--ink-soft);line-height:1.75}

/* ---------- 产品与方案 ---------- */
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:24px}
.product-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow);display:flex;flex-direction:column;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.product-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.product-cover{
  height:150px;position:relative;display:grid;place-items:center;color:#fff;overflow:hidden;
  background:linear-gradient(135deg,var(--navy-2),var(--blue));
}
.product-cover::after{
  content:"";position:absolute;inset:0;opacity:.18;
  background-image:linear-gradient(rgba(255,255,255,.5) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:26px 26px;
}
.product-cover svg{position:relative;z-index:1;opacity:.95}
.product-body{padding:22px 24px 26px;display:flex;flex-direction:column;flex:1}
.product-tag{
  display:inline-block;align-self:flex-start;font-size:12px;font-weight:600;color:var(--blue);
  background:var(--bg-soft);padding:3px 10px;border-radius:20px;margin-bottom:12px;
}
.product-card h3{font-size:18px;color:var(--navy);margin-bottom:8px;font-weight:700}
.product-card .pc-desc{font-size:14px;color:var(--ink-soft);line-height:1.7;flex:1}
.product-actions{margin-top:18px;display:flex;gap:10px}
.btn-trial{
  display:inline-flex;align-items:center;justify-content:center;padding:9px 20px;border-radius:30px;
  font-size:13.5px;font-weight:600;transition:all .25s var(--ease);
}
.btn-trial.available{background:linear-gradient(135deg,var(--blue),var(--blue-light));color:#fff;box-shadow:0 6px 16px rgba(29,111,224,.3)}
.btn-trial.available:hover{transform:translateY(-2px);box-shadow:0 10px 22px rgba(29,111,224,.4)}
.btn-trial.disabled{background:var(--bg-soft);color:var(--ink-soft);cursor:not-allowed}
.product-note{
  display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--ink-soft);
  background:#fff;border:1px dashed var(--line);border-radius:var(--radius-sm);padding:14px 20px;
}
.product-note .dot{width:8px;height:8px;border-radius:50%;background:var(--blue);flex:none}

/* ---------- 新闻动态 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow);cursor:pointer;display:flex;flex-direction:column;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.news-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.news-cover{height:170px;position:relative;overflow:hidden;display:grid;place-items:center;color:#fff}
.news-cover .nc-date{position:relative;z-index:2;text-align:center}
.news-cover .nc-date .d{font-size:34px;font-weight:800;line-height:1}
.news-cover .nc-date .m{font-size:13px;opacity:.85;margin-top:4px}
.news-body{padding:20px 22px 24px;display:flex;flex-direction:column;flex:1}
.news-meta{display:flex;align-items:center;gap:10px;margin-bottom:10px;flex-wrap:wrap}
.news-cat{font-size:12px;font-weight:600;color:var(--blue);background:var(--bg-soft);padding:3px 10px;border-radius:20px}
.news-card h3{font-size:17px;color:var(--navy);font-weight:700;line-height:1.5;margin-bottom:8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card .nc-desc{font-size:14px;color:var(--ink-soft);line-height:1.7;flex:1;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.news-more{margin-top:14px;font-size:13px;color:var(--blue);font-weight:600}

/* ---------- 新闻列表行（新闻中心列表视图） ---------- */
.news-list-item{
  display:flex;align-items:center;gap:20px;padding:20px 24px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);cursor:pointer;text-decoration:none;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
  margin-bottom:12px;
}
.news-list-item:hover{transform:translateX(4px);box-shadow:var(--shadow-lg)}
.nli-date{
  flex:none;width:72px;text-align:center;line-height:1.2;
}
.nli-day{display:block;font-size:30px;font-weight:800;color:var(--navy)}
.nli-ym{display:block;font-size:12px;color:var(--ink-soft);margin-top:2px}
.nli-thumb{
  flex:none;width:100px;height:68px;border-radius:6px;
  background-size:cover;background-position:center;
}
.nli-body{flex:1;min-width:0}
.nli-body h3{
  font-size:16px;font-weight:700;color:var(--navy);line-height:1.5;margin:0 0 4px;
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden
}
.nli-body p{
  font-size:13px;color:var(--ink-soft);line-height:1.6;margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden
}
.nli-meta{flex:none}
.nli-arrow{
  flex:none;font-size:22px;color:var(--blue);font-weight:300;
  transition:transform .2s
}
.news-list-item:hover .nli-arrow{transform:translateX(3px)}

/* ---------- 新闻分页 ---------- */
.news-pagination{display:flex;justify-content:center;align-items:center;gap:8px;margin-top:40px;flex-wrap:wrap}
.page-btn{display:inline-flex;align-items:center;justify-content:center;min-width:40px;height:40px;
  padding:0 12px;border:1px solid var(--line);border-radius:8px;background:#fff;
  color:var(--navy);font-size:14px;font-weight:500;cursor:pointer;
  transition:all .2s;user-select:none}
.page-btn:hover:not(:disabled):not(.active){border-color:var(--blue);color:var(--blue);
  background:rgba(30,111,217,.06)}
.page-btn.active{background:var(--blue);color:#fff;border-color:var(--blue);font-weight:700}
.page-btn:disabled{opacity:.35;cursor:default}
.page-ellipsis{display:inline-flex;align-items:center;justify-content:center;min-width:40px;
  color:var(--ink-soft);font-size:14px}

/* ---------- 联系我们 ---------- */
.contact-grid{display:grid;grid-template-columns:1.4fr .6fr;gap:40px;align-items:stretch}
.contact-info{display:flex;flex-direction:column;gap:18px}
.contact-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 24px;
  box-shadow:var(--shadow);display:flex;align-items:center;gap:20px;
}
.ci-label{font-size:13px;color:var(--blue);font-weight:700;min-width:90px;flex:none;
  background:var(--bg-soft);padding:4px 12px;border-radius:8px;text-align:center}
.ci-value{font-size:15px;color:var(--ink);font-weight:500}
.contact-qr{
  background:linear-gradient(160deg,var(--navy),var(--navy-2));border-radius:var(--radius);
  padding:30px 24px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;color:#fff;box-shadow:var(--shadow-lg);
}
.contact-qr img{width:170px;height:170px;border-radius:12px;border:4px solid rgba(255,255,255,.9);margin-bottom:16px}
.qr-title{font-size:16px;font-weight:700}
.qr-sub{font-size:13px;color:rgba(255,255,255,.7);margin-top:4px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--navy);color:rgba(255,255,255,.75)}
.footer-inner{display:grid;grid-template-columns:1.3fr 2fr;gap:48px;padding:64px 24px 40px}
.footer-brand{max-width:380px}
.footer-logo{height:42px;width:auto;margin-bottom:18px;filter:brightness(0) invert(1)}
.footer-desc{font-size:14px;line-height:1.85;color:rgba(255,255,255,.6)}
.footer-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:18px;font-weight:600;letter-spacing:1px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{font-size:14px;color:rgba(255,255,255,.6);transition:color .2s var(--ease)}
.footer-col ul li a:hover{color:var(--blue-light)}
.footer-qr{display:flex;flex-direction:column;align-items:flex-start;gap:10px}
.footer-qr img{width:120px;height:120px;border-radius:8px;border:2px solid rgba(255,255,255,.85)}
.footer-qr span{font-size:13px;color:rgba(255,255,255,.6)}

/* ---------- 备案信息（最底部） ---------- */
.footer-beian{border-top:1px solid rgba(255,255,255,.1);background:#07172e}
.beian-inner{
  display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:10px 14px;
  padding:18px 24px;font-size:13px;color:rgba(255,255,255,.6);
}
.beian-item{display:inline-flex;align-items:center;gap:6px}
.beian-icon{width:18px;height:auto;opacity:.85}
.beian-item a{color:rgba(255,255,255,.6);transition:color .2s var(--ease)}
.beian-item a:hover{color:var(--blue-light)}
.beian-divider{color:rgba(255,255,255,.25)}
.beian-copyright{width:100%;text-align:center;color:rgba(255,255,255,.45);font-size:12.5px;margin-top:4px}

/* ---------- 回到顶部 ---------- */
.back-top{
  position:fixed;right:24px;bottom:28px;width:46px;height:46px;border-radius:50%;z-index:900;
  background:var(--navy);color:#fff;display:grid;place-items:center;box-shadow:var(--shadow-lg);
  opacity:0;visibility:hidden;transform:translateY(12px);transition:all .3s var(--ease);
}
.back-top.show{opacity:1;visibility:visible;transform:none}
.back-top:hover{background:var(--blue);transform:translateY(-3px)}

/* ---------- 加载提示 ---------- */
.loading-tip{text-align:center;color:var(--ink-soft);padding:40px;grid-column:1/-1}

/* ---------- 滚动出现动画 ---------- */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.visible{opacity:1;transform:none}

/* ============================================================
   响应式断点
   ============================================================ */

/* ---- 平板 (<= 992px) ---- */
@media (max-width:992px){
  :root{--header-h:64px}
  .container{padding:0 20px}
  .section{padding:70px 0}
  .section-head{margin-bottom:44px}

  .brand-logo{height:36px}
  .site-header.scrolled .brand-logo{height:34px}

  .hero{min-height:auto;padding:calc(var(--header-h) + 50px) 0 56px}
  .hero-stats{gap:28px;margin-top:48px}

  .about-grid{grid-template-columns:1fr;gap:32px}
  .biz-grid{grid-template-columns:repeat(2,1fr)}
  .product-grid{grid-template-columns:repeat(2,1fr)}
  .news-grid{grid-template-columns:repeat(2,1fr)}

  .contact-grid{grid-template-columns:1fr;gap:24px}
  .contact-qr{flex-direction:row;justify-content:center;gap:20px;padding:24px}
  .contact-qr img{width:130px;height:130px;margin-bottom:0}

  .footer-inner{grid-template-columns:1fr;gap:36px;padding:52px 20px 32px}
  .footer-cols{grid-template-columns:repeat(3,1fr);gap:24px}
}

/* ---- 手机 (<= 640px) ---- */
@media (max-width:640px){
  body{font-size:15px}
  :root{--header-h:60px}
  .container{padding:0 16px}

  /* 移动端导航：抽屉式 */
  .nav-toggle{display:flex}
  .nav-menu{
    position:fixed;top:var(--header-h);left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:rgba(255,255,255,.98);backdrop-filter:blur(12px);
    padding:12px 16px 24px;box-shadow:0 16px 30px rgba(10,31,60,.12);
    transform:translateY(-130%);opacity:0;visibility:hidden;
    transition:transform .35s var(--ease),opacity .35s var(--ease),visibility .35s;
    max-height:calc(100vh - var(--header-h));overflow-y:auto;
  }
  .nav-menu.open{transform:none;opacity:1;visibility:visible}
  .nav-link{
    color:var(--ink);padding:14px 16px;font-size:16px;border-radius:10px;
    border-bottom:1px solid var(--line);
  }
  .nav-link:last-child{border-bottom:none}
  .nav-link:hover{background:var(--bg-soft)}
  .nav-link.active{color:var(--blue);background:var(--bg-soft)}
  .nav-link.active::after{display:none}

  .brand-logo{height:32px}

  .hero{padding:calc(var(--header-h) + 36px) 0 48px;text-align:left}
  .hero-eyebrow{font-size:12px;letter-spacing:2px;padding:5px 14px;margin-bottom:18px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .hero-stats{gap:22px 30px;margin-top:40px;padding-top:26px}
  .stat{flex:1 1 40%}

  .section{padding:56px 0}
  .section-head{margin-bottom:36px}
  .section-tag{font-size:12px;letter-spacing:2px}

  .biz-grid{grid-template-columns:1fr;gap:16px}
  .biz-card{padding:26px 22px}

  .product-grid{grid-template-columns:1fr;gap:18px}
  .news-grid{grid-template-columns:1fr;gap:18px}
  .news-list-item{flex-wrap:wrap;gap:12px;padding:16px}
  .nli-date{width:auto;display:flex;align-items:baseline;gap:8px}
  .nli-day{font-size:22px}
  .nli-thumb{width:60px;height:48px}
  .nli-meta{display:none}
  .nli-arrow{display:none}

  .about-card{padding:20px 22px}

  .contact-item{flex-direction:column;align-items:flex-start;gap:8px;padding:16px 20px}
  .ci-label{min-width:auto;align-self:flex-start}
  .contact-qr{flex-direction:column;padding:28px 20px}
  .contact-qr img{width:140px;height:140px;margin-bottom:12px}

  .footer-inner{padding:44px 16px 28px;gap:32px}
  .footer-cols{grid-template-columns:1fr 1fr;gap:28px}
  .footer-qr-col{grid-column:1/-1}
  .footer-qr{align-items:center}
  .footer-logo{height:36px}

  .beian-inner{flex-direction:column;gap:8px;padding:16px 16px}
  .beian-copyright{width:100%}

  .back-top{right:16px;bottom:20px;width:42px;height:42px}
}

/* ---- 超小屏 (<= 380px) ---- */
@media (max-width:380px){
  .hero-title{font-size:27px}
  .footer-cols{grid-template-columns:1fr}
}

/* ---- 减少动画偏好 ---- */
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important;scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}