/* ============================================================
   安熵家智能戒指官网 V2.0 - 全局样式
   视觉方向：高端科技品牌 + 智能穿戴 + 企业官网（简洁/留白/克制动效）
   ============================================================ */
:root{
  /* 色彩体系：白 / 浅灰 / 深灰 / 黑 为主，强调色克制使用 */
  --bg:#ffffff;
  --bg-soft:#f3f9f5;
  --bg-deep:#0e1013;
  --bg-deep-2:#15181d;
  --text:#14161a;
  --text-2:#4b5159;
  --text-3:#8b919b;
  --line:#e7e9ed;
  --line-dark:rgba(255,255,255,.10);
  --accent:#00733b;          /* 品牌深绿（薄荷健康风格），小面积使用 */
  --accent-soft:#e6f6ec;
  --accent-deep:#005e31;
  --accent-bright:#02bb5d;   /* 亮绿（CTA 按钮） */
  --bg-green:#0d4a33;        /* 深绿（深色区块主色） */
  --bg-green-2:#0a3b28;      /* 深绿（次级区块/卡片） */
  --bg-green-grad:linear-gradient(160deg,#0d4a33 0%,#093522 100%);

  /* 字体 */
  --font-cn:"PingFang SC","Source Han Sans SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  --font-en:Inter,"SF Pro Display",-apple-system,"Helvetica Neue",Arial,sans-serif;

  /* 尺寸 */
  --radius:16px;
  --radius-lg:24px;
  --shadow-sm:0 2px 10px rgba(20,22,26,.06);
  --shadow-md:0 12px 34px rgba(20,22,26,.09);
  --shadow-lg:0 30px 70px rgba(20,22,26,.14);
  --container:1200px;
  --header-h:76px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-cn);color:var(--text);background:var(--bg);
  line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer}
section[id]{scroll-margin-top:calc(var(--header-h) + 8px)}
.container{width:min(var(--container),92%);margin:0 auto}
.section{padding:104px 0}

/* ---------- 通用标题 ---------- */
.sec-tag{
  display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:2px;
  color:var(--accent);text-transform:uppercase;margin-bottom:16px;
}
.sec-title{font-size:clamp(28px,3.6vw,42px);font-weight:800;letter-spacing:.5px;line-height:1.25;color:var(--text)}
.sec-sub{font-size:16.5px;color:var(--text-2);max-width:640px;margin-top:14px}
.sec-head{max-width:760px;margin-bottom:56px}
.sec-head.center{text-align:center;margin-left:auto;margin-right:auto}
.sec-head.center .sec-sub{margin-left:auto;margin-right:auto}
.section-dark{background:var(--bg-green-grad);color:#fff}
.section-dark .sec-title{color:#fff}
.section-dark .sec-sub{color:rgba(255,255,255,.62)}
.section-dark .sec-tag{color:#54d693}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;font-weight:600;border:1px solid transparent;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease;
  white-space:nowrap;text-align:center;
}
.btn:active{transform:scale(.98)}
.btn-sm{padding:10px 22px;font-size:14px}
.btn-lg{padding:16px 38px;font-size:16px}
.btn-dark{background:var(--text);color:#fff}
.btn-dark:hover{background:#000;box-shadow:var(--shadow-md);transform:translateY(-2px)}
.btn-accent{background:var(--accent-bright);color:#fff}
.btn-accent:hover{background:var(--accent-deep);transform:translateY(-2px);box-shadow:0 14px 30px rgba(2,187,93,.35)}
.btn-outline{border-color:var(--text);color:var(--text);background:transparent}
.btn-outline:hover{background:var(--text);color:#fff}
.btn-light{background:#fff;color:var(--text)}
.btn-light:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}
.btn-ghost-light{border-color:rgba(255,255,255,.4);color:#fff}
.btn-ghost-light:hover{background:rgba(255,255,255,.1)}
.btn-arrow{display:inline-block;transition:transform .22s ease}
.btn:hover .btn-arrow{transform:translateX(4px)}

/* ============================================================
   Header
   ============================================================ */
.header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:rgba(255,255,255,.92);backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .3s ease;
}
.header.scrolled{box-shadow:var(--shadow-sm)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:var(--header-h)}
.logo{display:flex;align-items:center;gap:10px}
.logo img{height:40px;width:auto}
.logo-text{font-size:21px;font-weight:800;color:var(--text);line-height:1;letter-spacing:.5px}
.logo-text small{display:block;font-size:9.5px;letter-spacing:3px;color:var(--accent);font-weight:700;margin-top:3px}
.main-nav{display:flex;align-items:center;gap:2px}
.main-nav > a,.nav-drop-trigger{
  display:block;padding:10px 12px;border-radius:999px;
  font-size:14px;font-weight:500;color:var(--text-2);
  transition:color .2s,background .2s;
}
.main-nav > a:hover,.nav-drop-trigger:hover,.main-nav > a.active{color:var(--text);background:var(--bg-soft)}
.nav-drop{position:relative}
.nav-drop-menu{
  position:absolute;top:calc(100% + 10px);left:50%;transform:translateX(-50%) translateY(6px);
  background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-md);
  min-width:180px;padding:8px;opacity:0;visibility:hidden;transition:.22s ease;
}
.nav-drop:hover .nav-drop-menu,.nav-drop:focus-within .nav-drop-menu{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.nav-drop-menu a{display:block;padding:10px 14px;border-radius:10px;font-size:14px;color:var(--text-2)}
.nav-drop-menu a:hover{background:var(--bg-soft);color:var(--text)}
.header-right{display:flex;align-items:center;gap:12px}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;padding:9px}
.nav-toggle span{width:22px;height:2px;background:var(--text);border-radius:2px;transition:.3s}
.nav-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ============================================================
   Hero（01）
   ============================================================ */
.hero{position:relative;padding:calc(var(--header-h) + 72px) 0 96px;overflow:hidden;background:var(--bg)}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(720px 480px at 82% 30%,rgba(2,187,93,.10),transparent 62%),
             radial-gradient(560px 420px at 8% 88%,rgba(2,187,93,.08),transparent 60%);
}
.hero-inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:1.5px;color:var(--accent);
  border:1px solid rgba(2,187,93,.32);background:var(--accent-soft);
  padding:7px 16px;border-radius:999px;margin-bottom:26px;
}
.hero h1{font-size:clamp(40px,5.2vw,66px);font-weight:800;line-height:1.12;letter-spacing:1px;color:var(--text)}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero-desc{font-size:17.5px;color:var(--text-2);max-width:540px;margin:24px 0 36px}
.hero-sub{font-size:15.5px;font-weight:600;letter-spacing:.5px;color:var(--accent);margin:12px 0 0}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.hero-visual{display:flex;justify-content:center;align-items:center;position:relative}
.hero-img-wrap{position:relative;width:min(440px,100%)}
.hero-img{
  width:100%;border-radius:28px;object-fit:cover;
  box-shadow:var(--shadow-lg);
  animation:heroFloat 6s ease-in-out infinite;
}
@keyframes heroFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.hero-caption{
  position:absolute;left:50%;transform:translateX(-50%);bottom:-26px;
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-md);
  border-radius:12px;padding:10px 18px;font-size:13px;color:var(--text-2);white-space:nowrap;
}
.hero-caption b{color:var(--text)}
.hero-scroll{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);color:var(--text-3);font-size:12px;letter-spacing:2px}
.hero-scroll::after{content:"";display:block;width:1px;height:34px;background:var(--line);margin:8px auto 0}

/* ============================================================
   核心数据（02）
   ============================================================ */
.stats{border-top:1px solid var(--line);background:var(--bg)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:56px 0}
.stat-item{text-align:center}
.stat-num{font-family:var(--font-en);font-size:clamp(40px,4.6vw,60px);font-weight:800;line-height:1;color:var(--text)}
.stat-num sup{font-size:.45em;color:var(--accent);font-weight:700}
.stat-label{font-size:14.5px;color:var(--text-2);margin-top:12px}
.stat-num .stat-pre{font-size:.42em;color:var(--accent);font-weight:700;margin-right:5px;vertical-align:2px}
.stats-note{font-size:12.5px;color:var(--text-3);text-align:center;margin-top:-32px}

/* ============================================================
   关于安熵家（03）
   ============================================================ */
.about{background:var(--bg)}
.about-inner{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center}
.about-media{position:relative}
.about-media img{width:100%;border-radius:var(--radius-lg);box-shadow:var(--shadow-md)}
.about-media .about-badge{
  position:absolute;right:18px;bottom:18px;background:#fff;border:1px solid var(--line);
  border-radius:14px;padding:14px 20px;box-shadow:var(--shadow-md);
}
.about-badge b{display:block;font-size:20px;font-weight:800;color:var(--text)}
.about-badge span{font-size:12.5px;color:var(--text-2)}
.about-text p{color:var(--text-2);font-size:16.5px;margin-bottom:18px}
.about-text .about-points{margin:24px 0 32px}
.about-text .about-points li{display:flex;align-items:center;gap:12px;padding:7px 0;font-size:15px;color:var(--text)}
.about-text .about-points svg{width:20px;height:20px;color:var(--accent);flex:0 0 20px}

/* ============================================================
   企业核心能力（04）
   ============================================================ */
.capabilities{background:var(--bg-soft)}
.cap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.cap-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:34px 30px;position:relative;overflow:hidden;
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.cap-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);border-color:transparent}
.cap-num{
  position:absolute;top:18px;right:22px;font-family:var(--font-en);
  font-size:44px;font-weight:800;color:var(--line);line-height:1;
}
.cap-ic{width:52px;height:52px;border-radius:14px;background:var(--accent-soft);color:var(--accent);display:flex;align-items:center;justify-content:center;margin-bottom:20px}
.cap-ic svg{width:26px;height:26px}
.cap-card h3{font-size:18.5px;font-weight:700;color:var(--text);margin-bottom:8px}
.cap-card p{font-size:14.5px;color:var(--text-2)}

/* ============================================================
   产品系列（05）
   ============================================================ */
.products{background:var(--bg)}
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.product-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  display:flex;flex-direction:column;transition:transform .3s ease,box-shadow .3s ease;
}
.product-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md)}
.product-media{position:relative;background:var(--bg-soft);aspect-ratio:4/3;overflow:hidden}
.product-media img{width:100%;height:100%;object-fit:contain;transition:transform .5s ease}
.product-card:hover .product-media img{transform:scale(1.05)}
.product-series{
  position:absolute;top:14px;left:14px;z-index:2;
  font-size:11.5px;font-weight:700;letter-spacing:.5px;
  background:rgba(255,255,255,.92);border:1px solid var(--line);
  color:var(--text-2);padding:4px 12px;border-radius:999px;
}
.product-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1}
.product-body h3{font-size:18px;font-weight:700;color:var(--text)}
.product-model{font-family:var(--font-en);font-size:12px;font-weight:700;letter-spacing:1px;color:var(--accent);margin-top:2px}
.product-pos{display:inline-block;margin-top:8px;font-size:11.5px;font-weight:700;letter-spacing:.5px;color:var(--accent);background:var(--accent-soft);border:1px solid rgba(2,187,93,.22);padding:3px 10px;border-radius:999px}
.product-tagline{font-size:13.5px;color:var(--text-2);margin:10px 0 14px;line-height:1.6}
.product-feats{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:18px}
.product-feats span{font-size:11.5px;color:var(--text-2);background:var(--bg-soft);border-radius:999px;padding:3px 10px}
.product-more{
  margin-top:auto;display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--text);
  transition:color .2s,gap .2s;
}
.product-more:hover{color:var(--accent);gap:10px}
.section-more{text-align:center;margin-top:52px}

/* ============================================================
   健康科技（06）
   ============================================================ */
.healthtech{
  position:relative;padding:112px 0;overflow:hidden;
  background:linear-gradient(180deg,#ecf7f1 0%,#ffffff 100%);
}
.healthtech::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(640px 460px at 88% 18%,rgba(2,187,93,.09),transparent 60%),
             radial-gradient(520px 400px at 4% 88%,rgba(2,187,93,.06),transparent 60%);
}
.ht-inner{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.ht-text .sec-title{font-size:clamp(30px,3.8vw,44px)}
.ht-desc{font-size:16px;color:var(--text-2);max-width:520px;margin:22px 0 34px;line-height:1.9}
.ht-btns{display:flex;gap:14px;flex-wrap:wrap}
.ht-visual{position:relative;display:flex;justify-content:center;align-items:center;min-height:460px}
.ht-ring{position:relative;z-index:2;display:flex;justify-content:center;align-items:center;width:min(430px,100%)}
.ht-ring::before{
  content:"";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:92%;aspect-ratio:1;border-radius:50%;
  background:radial-gradient(circle,rgba(2,187,93,.16),rgba(2,187,93,.05) 58%,transparent 72%);
}
.ht-ring img{
  position:relative;width:72%;
  filter:drop-shadow(0 26px 50px rgba(0,115,59,.18));
  animation:heroFloat 7s ease-in-out infinite;
}
.ht-float{
  position:absolute;z-index:3;display:flex;align-items:center;gap:12px;
  background:#fff;border:1px solid var(--line);border-radius:16px;
  padding:12px 16px;box-shadow:var(--shadow-md);
  transition:transform .3s ease,box-shadow .3s ease;
}
.ht-float:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.ht-ic{
  width:42px;height:42px;border-radius:12px;flex:0 0 42px;
  background:var(--accent-soft);color:var(--accent);
  display:flex;align-items:center;justify-content:center;
}
.ht-ic svg{width:22px;height:22px}
.ht-float b{display:block;font-size:15px;font-weight:700;color:var(--text);line-height:1.3}
.ht-float small{font-size:12px;color:var(--text-3)}
.ht-float-1{top:6%;left:0}
.ht-float-2{top:30%;right:0}
.ht-float-3{bottom:10%;left:4%}

/* 六大健康能力 */
.ht-feats{
  position:relative;display:grid;grid-template-columns:repeat(6,1fr);gap:14px;margin-top:72px;
}
.ht-feat{
  display:flex;flex-direction:column;align-items:center;gap:10px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 16px;text-align:center;
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.ht-feat:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:rgba(2,187,93,.35)}
.ht-feat-ic{
  width:46px;height:46px;border-radius:13px;
  background:var(--accent-soft);color:var(--accent);
  display:flex;align-items:center;justify-content:center;
}
.ht-feat-ic svg{width:23px;height:23px}
.ht-feat b{font-size:15.5px;font-weight:700;color:var(--text)}
.ht-feat small{font-size:12.5px;color:var(--text-3);line-height:1.5}

@media (max-width:1024px){
  .ht-inner{grid-template-columns:1fr;gap:48px;text-align:center}
  .ht-desc{margin-left:auto;margin-right:auto}
  .ht-btns{justify-content:center}
  .ht-visual{order:-1;min-height:400px}
  .ht-feats{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:768px){
  .healthtech{padding:72px 0}
  .ht-visual{min-height:340px}
  .ht-ring{width:min(340px,100%)}
  .ht-float-1{left:0}
  .ht-float-2{right:0}
  .ht-float-3{left:2%}
  .ht-feats{grid-template-columns:repeat(2,1fr);margin-top:52px}
}
@media (max-width:430px){
  .ht-feats{grid-template-columns:1fr}
  .ht-float{padding:10px 12px}
  .ht-float b{font-size:13.5px}
  .ht-float small{font-size:11px}
}

   APP 体验（07）
   ============================================================ */
.app{background:var(--bg-soft)}
.app-scroll{display:flex;gap:28px;overflow-x:auto;padding:10px 4px 34px;scroll-snap-type:x mandatory}
.app-scroll::-webkit-scrollbar{height:6px}
.app-scroll::-webkit-scrollbar-thumb{background:var(--line);border-radius:4px}
.phone-mock{
  flex:0 0 230px;scroll-snap-align:center;
  background:#fff;border:1px solid var(--line);border-radius:34px;padding:10px;
  box-shadow:var(--shadow-md);transition:transform .3s ease;
}
.phone-mock:hover{transform:translateY(-6px)}
.phone-screen{
  background:var(--bg-deep);border-radius:26px;padding:26px 16px 30px;height:430px;
  display:flex;flex-direction:column;gap:12px;position:relative;overflow:hidden;
}
.phone-screen::before{content:"";position:absolute;top:8px;left:50%;transform:translateX(-50%);width:70px;height:16px;background:var(--bg-deep-2);border-radius:0 0 10px 10px}
.phone-label{font-size:12.5px;color:#fff;font-weight:600;text-align:center;margin-top:8px}
.phone-screen .skel{background:rgba(255,255,255,.10);border-radius:8px}
.phone-screen .skel-bar{height:14px;width:60%;align-self:center;margin-bottom:4px}
.phone-screen .skel-line{height:8px;width:100%}
.phone-screen .skel-line.w70{width:70%}
.phone-screen .skel-block{flex:1;width:100%;border-radius:12px}
.phone-screen .skel-cols{display:flex;gap:8px}
.phone-screen .skel-cols .skel{flex:1;height:90px}
.app-tip{text-align:center;font-size:13.5px;color:var(--text-3);margin-top:8px}
.app-tip code{background:var(--line);padding:2px 8px;border-radius:6px;font-size:12px;color:var(--text-2)}

/* ============================================================
   技术能力（08）
   ============================================================ */
.tech{background:var(--bg)}
.tech-flow{display:flex;align-items:stretch;gap:0;margin-top:20px}
.tech-step{
  flex:1;text-align:center;padding:34px 18px;position:relative;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  transition:transform .3s ease,box-shadow .3s ease;
}
.tech-step:hover{transform:translateY(-6px);box-shadow:var(--shadow-md)}
.tech-step + .tech-step{margin-left:22px}
.tech-step::after{
  content:"";position:absolute;top:50%;right:-14px;width:16px;height:2px;background:var(--line);
}
.tech-step:last-child::after{display:none}
.tech-ic{width:54px;height:54px;margin:0 auto 18px;border-radius:50%;background:var(--accent-soft);color:var(--accent);display:flex;align-items:center;justify-content:center}
.tech-ic svg{width:26px;height:26px}
.tech-step h3{font-size:16px;font-weight:700;color:var(--text)}
.tech-step p{font-size:12.5px;color:var(--text-3);margin-top:6px}

/* ============================================================
   OEM / ODM（09）
   ============================================================ */
.oem{position:relative;overflow:hidden;background:linear-gradient(180deg,#ecf7f1 0%,#ffffff 100%)}
.oem::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(640px 460px at 88% 18%,rgba(2,187,93,.09),transparent 60%),
             radial-gradient(520px 400px at 4% 88%,rgba(2,187,93,.06),transparent 60%);
}
.oem .container{position:relative}
.oem .sec-head.center{max-width:760px}
.oem .sec-tag{color:var(--accent)}
.oem .sec-sub{color:var(--text-2)}
.oem-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin:64px 0 56px}
.oem-step{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 26px;transition:transform .3s ease,border-color .3s ease;
}
.oem-step:hover{transform:translateY(-6px);border-color:rgba(2,187,93,.5)}
.oem-num{font-family:var(--font-en);font-size:15px;font-weight:700;color:var(--accent);display:flex;align-items:center;gap:8px;margin-bottom:14px}
.oem-num::after{content:"";flex:1;height:1px;background:var(--line)}
.oem-step h3{font-size:16.5px;font-weight:700;margin-bottom:8px;color:var(--text)}
.oem-step p{font-size:13.5px;color:var(--text-2)}
.oem-custom{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:52px}
.oem-custom span{
  font-size:13.5px;color:var(--text-2);
  border:1px solid var(--line);border-radius:999px;padding:8px 20px;
  transition:border-color .25s,color .25s;
}
.oem-custom span:hover{border-color:rgba(2,187,93,.55);color:var(--accent)}
.oem-cta{text-align:center}
.oem-cta p{color:var(--text-2);font-size:14.5px;margin-bottom:20px}

/* ============================================================
   应用场景（10）
   ============================================================ */
.scenes{background:var(--bg)}
.scenes-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:20px}
.scene-card{position:relative;border-radius:var(--radius);overflow:hidden;aspect-ratio:3/4;background:var(--bg-soft)}
.scene-card img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.scene-card:hover img{transform:scale(1.06)}
.scene-overlay{
  position:absolute;inset:0;display:flex;flex-direction:column;justify-content:flex-end;
  padding:22px;background:linear-gradient(180deg,rgba(14,16,19,0) 40%,rgba(14,16,19,.78) 100%);
}
.scene-overlay h3{color:#fff;font-size:17px;font-weight:700}
.scene-overlay p{color:rgba(255,255,255,.75);font-size:12.5px;margin-top:6px}

/* ============================================================
   合作案例（11）
   ============================================================ */
.cases{background:var(--bg-soft)}
.cases-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.case-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .3s ease,box-shadow .3s ease}
.case-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md)}
.case-media{
  aspect-ratio:16/9;background:var(--bg-soft);display:flex;align-items:center;justify-content:center;
  color:var(--text-3);font-size:13px;border-bottom:1px solid var(--line);
}
.case-body{padding:22px 24px 26px}
.case-body h3{font-size:16.5px;font-weight:700;margin-bottom:8px}
.case-body p{font-size:13.5px;color:var(--text-2);margin-bottom:12px}
.case-meta{display:flex;flex-wrap:wrap;gap:8px}
.case-meta span{font-size:11.5px;color:var(--text-2);background:var(--bg-soft);border-radius:999px;padding:4px 12px}

/* ============================================================
   联系我们 / CTA（12）
   ============================================================ */
.contact{background:var(--bg-green-grad);color:#fff;position:relative;overflow:hidden}
.contact::before{content:"";position:absolute;inset:0;background:radial-gradient(640px 440px at 90% 10%,rgba(2,187,93,.22),transparent 60%)}
.contact-inner{position:relative;display:grid;grid-template-columns:1fr 1.15fr;gap:72px;align-items:start}
.contact-info .sec-title{color:#fff}
.contact-info > p{color:rgba(255,255,255,.62);margin-top:16px;font-size:15.5px}
.contact-cards{margin-top:40px;display:grid;gap:14px}
.contact-card{
  display:flex;align-items:center;gap:16px;background:rgba(255,255,255,.05);
  border:1px solid var(--line-dark);border-radius:14px;padding:16px 18px;
  transition:border-color .25s,background .25s;
}
.contact-card:hover{border-color:rgba(84,214,147,.45);background:rgba(255,255,255,.08)}
.contact-ic{width:42px;height:42px;border-radius:12px;background:rgba(84,214,147,.16);color:#6ee0a4;display:flex;align-items:center;justify-content:center;flex:0 0 42px}
.contact-ic svg{width:21px;height:21px}
.contact-card b{display:block;font-size:13px;color:rgba(255,255,255,.5);font-weight:600}
.contact-card span{font-size:14.5px;color:#fff}
.contact-card .todo-mark{
  font-size:12px;color:rgba(255,255,255,.45);border:1px dashed rgba(255,255,255,.3);
  padding:2px 10px;border-radius:999px;
}
.inquiry{
  background:var(--bg-green-2);border:1px solid var(--line-dark);border-radius:var(--radius-lg);
  padding:40px 38px;
}
.inquiry h3{font-size:22px;font-weight:800;margin-bottom:6px}
.inquiry > p{font-size:14px;color:rgba(255,255,255,.55);margin-bottom:26px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-item{display:flex;flex-direction:column;gap:7px}
.form-item.full{grid-column:1/-1}
.form-item label{font-size:13px;color:rgba(255,255,255,.72);font-weight:500}
.form-item label i{color:#6ee0a4;font-style:normal}
.form-item input,.form-item select,.form-item textarea{
  background:rgba(255,255,255,.06);border:1px solid var(--line-dark);border-radius:11px;
  color:#fff;padding:12px 15px;font-size:14.5px;font-family:inherit;outline:none;transition:border-color .25s,background .25s;
}
.form-item textarea{resize:vertical;min-height:96px}
.form-item input::placeholder,.form-item textarea::placeholder{color:rgba(255,255,255,.35)}
.form-item input:focus,.form-item select:focus,.form-item textarea:focus{border-color:rgba(84,214,147,.6);background:rgba(255,255,255,.09)}
.form-item select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23fff' fill='none'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center}
.form-item select option{background:var(--bg-deep-2);color:#fff}
.form-submit{margin-top:22px}
.form-msg{min-height:20px;margin-top:14px;font-size:14px;color:#6ee0a4}
.form-msg.error{color:#ff9f9f}
.form-note{font-size:12px;color:rgba(255,255,255,.4);margin-top:10px}

/* ============================================================
   Footer
   ============================================================ */
.footer{background:var(--bg-green-2);border-top:1px solid var(--line-dark);padding:72px 0 0}
.footer-top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:56px}
.footer-logo{display:inline-flex;align-items:center;gap:10px;margin-bottom:18px}
.footer-logo img{height:38px}
.footer-logo span{font-size:20px;font-weight:800;color:#fff;line-height:1}
.footer-logo small{display:block;font-size:9.5px;letter-spacing:3px;color:#54d693;margin-top:2px}
.footer-about p{font-size:13.5px;color:rgba(255,255,255,.5);line-height:1.9;max-width:300px}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:18px}
.footer-col ul li{margin-bottom:10px;font-size:14px;color:rgba(255,255,255,.55)}
.footer-col a{transition:color .25s}
.footer-col a:hover{color:#fff}
.footer-col .todo-mark{font-size:12px;color:rgba(255,255,255,.4);border:1px dashed rgba(255,255,255,.25);padding:1px 9px;border-radius:999px}
.footer-bottom{border-top:1px solid var(--line-dark);padding:22px 0;text-align:center}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,.42);line-height:1.9}

/* ============================================================
   组件：Scroll reveal / 回到顶部 / 移动端 CTA
   ============================================================ */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in-view{opacity:1;transform:none}
.scroll-top{
  position:fixed;right:24px;bottom:24px;z-index:900;
  width:46px;height:46px;border-radius:50%;background:var(--text);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:18px;
  box-shadow:var(--shadow-md);opacity:0;visibility:hidden;transform:translateY(14px);transition:.3s;
}
.scroll-top.show{opacity:1;visibility:visible;transform:none}
.mobile-cta{display:none}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width:1280px){
  .product-grid{grid-template-columns:repeat(3,1fr)}
  .scenes-grid{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:1024px){
  .section{padding:84px 0}
  .hero-inner{grid-template-columns:1fr;gap:56px;text-align:center}
  .hero-desc{margin-left:auto;margin-right:auto}
  .hero-btns{justify-content:center}
  .hero-visual{order:-1}
  .hero-img-wrap{width:min(360px,86%)}
  .about-inner{grid-template-columns:1fr;gap:52px}
  .cap-grid{grid-template-columns:repeat(2,1fr)}
  .contact-inner{grid-template-columns:1fr;gap:56px}
  .oem-steps{grid-template-columns:repeat(2,1fr)}
  .cases-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
  :root{--header-h:64px}
  .section{padding:68px 0}
  .sec-head{margin-bottom:40px}
  .header-dl{display:none}
  .nav-toggle{display:flex;padding:12px}
  .header-cta{display:none}
  .main-nav{
    position:fixed;top:calc(var(--header-h) + 6px);right:8px;left:auto;bottom:auto;
    width:min(240px,72vw);
    max-height:calc(100vh - var(--header-h) - 20px);
    background:#fff;flex-direction:column;align-items:stretch;padding:10px;
    border:1px solid var(--line);border-radius:14px;
    box-shadow:0 12px 40px rgba(20,22,26,.18);overflow-y:auto;z-index:1200;
    display:none;
  }
  .main-nav.open{display:flex !important}
  .main-nav > a,.nav-drop-trigger{
    padding:12px 14px;font-size:14.5px;border-radius:8px;flex-shrink:0;
    display:flex;align-items:center;justify-content:space-between;
    color:var(--text) !important;
  }
  .nav-drop{display:block}
  .nav-drop-trigger::after{content:"\203A";font-size:18px;color:var(--text-3);transition:transform .25s;margin-left:8px}
  .nav-drop.open .nav-drop-trigger::after{transform:rotate(90deg)}
  .nav-drop-menu{position:static !important;transform:none !important;opacity:1 !important;visibility:visible !important;box-shadow:none !important;border:0 !important;background:var(--bg-soft) !important;margin:3px 0 5px !important;padding:3px !important;border-radius:8px !important;display:none !important}
  .nav-drop:hover .nav-drop-menu,.nav-drop:focus-within .nav-drop-menu{display:none !important}
  .nav-drop.open .nav-drop-menu{display:block !important}
  .nav-drop-menu a{display:block !important;padding:10px 14px !important;font-size:13.5px !important;color:var(--text-2) !important;flex-shrink:0;border-radius:6px}
  .nav-drop-menu a:hover{color:var(--accent) !important;background:rgba(2,187,93,.08)}
  .product-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:32px 12px}
  .tech-flow{flex-direction:column;gap:14px}
  .tech-step + .tech-step{margin-left:0}
  .tech-step::after{display:none}
  .scenes-grid{grid-template-columns:repeat(2,1fr)}
  .oem-steps{grid-template-columns:1fr}
  .cases-grid{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr 1fr;gap:36px}
  .mobile-cta{
    display:block;position:fixed;bottom:0;left:0;right:0;z-index:950;
    background:rgba(255,255,255,.95);backdrop-filter:blur(12px);
    border-top:1px solid var(--line);padding:10px 16px;
  }
  .mobile-cta .btn{width:100%}
  body{padding-bottom:72px}
  .scroll-top{bottom:88px}
  .footer{padding-bottom:72px}
}
@media (max-width:430px){
  .hero{padding-top:calc(var(--header-h) + 48px)}
  .hero h1{font-size:36px}
  .hero-desc{font-size:15.5px}
  .btn-lg{padding:14px 28px}
  .product-grid{grid-template-columns:1fr}
  .cap-grid{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .contact-cards{margin-top:28px}
  .inquiry{padding:30px 22px}
  .sec-title{font-size:27px}
}
@media (max-width:375px){
  .stats-grid{grid-template-columns:1fr 1fr}
  .scenes-grid{grid-template-columns:1fr}
  .hero-btns .btn{flex:1}
  .hero h1{font-size:32px}
  .sec-title{font-size:24px}
}

/* ---------- 追加：产品中心系列分组 ---------- */
.series-group{margin-bottom:64px}
.series-group:last-child{margin-bottom:0}
.series-head{display:flex;align-items:baseline;gap:14px;margin-bottom:22px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.series-head h3{font-size:22px;font-weight:800;color:var(--text)}
.series-head p{font-size:13px;color:var(--text-3)}

/* ---------- 追加：1024px 以下使用移动端菜单 ---------- */
@media (max-width:1024px){
  .main-nav{
    position:fixed;top:calc(var(--header-h) + 6px);right:8px;left:auto;bottom:auto;
    width:min(240px,72vw);
    max-height:calc(100vh - var(--header-h) - 20px);
    background:#fff;flex-direction:column;align-items:stretch;padding:10px;
    border:1px solid var(--line);border-radius:14px;
    box-shadow:0 12px 40px rgba(20,22,26,.18);overflow-y:auto;z-index:1200;
    display:none;
  }
  .main-nav.open{display:flex !important}
  .main-nav > a,.nav-drop-trigger{padding:12px 14px;font-size:14.5px;border-radius:8px;flex-shrink:0;display:flex;align-items:center;justify-content:space-between;color:var(--text) !important}
  .nav-drop{display:block}
  .nav-drop-trigger::after{content:"\203A";font-size:18px;color:var(--text-3);transition:transform .25s;margin-left:8px}
  .nav-drop.open .nav-drop-trigger::after{transform:rotate(90deg)}
  .nav-drop-menu{position:static !important;transform:none !important;opacity:1 !important;visibility:visible !important;box-shadow:none !important;border:0 !important;background:var(--bg-soft) !important;margin:3px 0 5px !important;padding:3px !important;border-radius:8px !important;display:none !important}
  .nav-drop:hover .nav-drop-menu,.nav-drop:focus-within .nav-drop-menu{display:none !important}
  .nav-drop.open .nav-drop-menu{display:block !important}
  .nav-drop-menu a{display:block !important;padding:10px 14px !important;font-size:13.5px !important;color:var(--text-2) !important;flex-shrink:0;border-radius:6px}
  .nav-drop-menu a:hover{color:var(--accent) !important;background:rgba(2,187,93,.08)}
  .nav-toggle{display:flex}
  .header-cta{display:none}
}


/* ============================================================
   安熵纪元 V2.1 - 新组件样式（追加）
   ============================================================ */

/* ---------- Hero：视频背景 ---------- */
.hero{background:var(--bg-deep);min-height:100vh;display:flex;align-items:center;padding-top:calc(var(--header-h) + 40px)}
.hero-video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.hero-mask{position:absolute;inset:0;z-index:1;background:linear-gradient(100deg,rgba(7,26,19,.86) 0%,rgba(7,26,19,.58) 48%,rgba(7,26,19,.30) 100%)}
.hero-inner{position:relative;z-index:2;grid-template-columns:1fr;justify-items:start}
.hero-content{max-width:680px}
.hero .hero-tag{color:#54d693;background:rgba(84,214,147,.14);border:1px solid rgba(84,214,147,.35);padding:8px 16px;border-radius:999px}
.hero h1{color:#fff;font-size:clamp(42px,6vw,78px);line-height:1.08}
.hero h1 em{color:#54d693;display:block;font-style:normal}
.hero-desc{color:rgba(255,255,255,.82)}
.hero-scroll{color:rgba(255,255,255,.55)}
.hero-scroll::after{background:rgba(255,255,255,.4)}

/* ---------- Header：App 下载入口 ---------- */
.header-ring-app{font-size:15px;font-weight:600;color:var(--accent);padding:10px 4px;white-space:nowrap;transition:color .2s}
.header-ring-app:hover{color:var(--accent-deep)}

/* ---------- App 展示区 ---------- */
.phone-mock{flex:0 0 248px;scroll-snap-align:center}
.phone-frame{
  height:520px;border-radius:36px;overflow:hidden;
  border:9px solid #10151b;background:#fff;box-shadow:var(--shadow-md);
  transition:transform .3s ease,box-shadow .3s ease;
}
.phone-mock:hover .phone-frame{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.phone-frame img{width:100%;height:100%;object-fit:cover;object-position:center top}
.phone-cap{text-align:center;font-size:14px;font-weight:600;color:var(--text-2);margin-top:14px}
.app-feats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:52px}
.app-feat{
  display:flex;flex-direction:column;gap:6px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 26px;
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.app-feat:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:rgba(2,187,93,.4)}
.app-feat span{font-size:12px;font-weight:800;letter-spacing:1.5px;color:var(--accent)}
.app-feat b{font-size:17px;font-weight:700;color:var(--text)}
.app-feat small{font-size:13px;color:var(--text-2);line-height:1.6}

/* ---------- 健康科技：产品亮点 ---------- */
.ht-specs{position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:64px}
.ht-spec{
  text-align:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 16px;transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.ht-spec:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:rgba(2,187,93,.4)}
.ht-spec b{display:block;font-family:var(--font-en);font-size:clamp(26px,3vw,34px);font-weight:800;color:var(--accent);line-height:1.1}
.ht-spec span{font-size:13.5px;color:var(--text-2)}

/* ---------- 业务合作二维码 ---------- */
.coop-card{
  position:relative;margin-top:26px;display:flex;align-items:center;gap:14px;
  background:rgba(255,255,255,.05);border:1px dashed rgba(84,214,147,.55);border-radius:14px;padding:16px 18px;
  transition:border-color .25s,background .25s;cursor:default;
}
.coop-card:hover{background:rgba(255,255,255,.1);border-color:rgba(84,214,147,.85)}
.coop-ic{width:42px;height:42px;border-radius:12px;background:rgba(84,214,147,.16);color:#6ee0a4;display:flex;align-items:center;justify-content:center;flex:0 0 42px}
.coop-ic svg{width:21px;height:21px}
.coop-text b{display:block;font-size:15px;font-weight:700;color:#fff}
.coop-text span{font-size:12.5px;color:rgba(255,255,255,.6)}
.coop-hint{margin-left:auto;font-size:12px;color:#6ee0a4;border:1px solid rgba(84,214,147,.4);border-radius:999px;padding:4px 10px;white-space:nowrap}
.qr-pop{
  position:absolute;right:0;top:calc(100% + 14px);z-index:30;
  background:#fff;border-radius:16px;padding:16px;box-shadow:0 24px 60px rgba(0,0,0,.38);
  display:flex;flex-direction:column;align-items:center;gap:9px;
  opacity:0;visibility:hidden;transform:translateY(10px);transition:.25s ease;
}
.coop-card:hover .qr-pop,.coop-card.open .qr-pop{opacity:1;visibility:visible;transform:none}
.qr-pop img{width:176px;height:176px;border-radius:10px}
.qr-pop span{font-size:12.5px;color:var(--text-2);font-weight:600}

/* ---------- Footer ---------- */
.footer-bottom p a{color:#54d693;font-size:13px;transition:opacity .2s}
.footer-bottom p a:hover{opacity:.8;text-decoration:underline}

/* ---------- 响应式 ---------- */
@media (max-width:1280px){
  .header-ring-app{display:none}
}
@media (max-width:1024px){
  .app-feats{grid-template-columns:repeat(2,1fr)}
  .ht-specs{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
  .hero{min-height:88vh}
  .hero h1{font-size:clamp(34px,9vw,44px)}
  .hero-desc{font-size:15.5px}
  .phone-frame{height:460px}
  .phone-mock{flex-basis:210px}
  .app-feats{grid-template-columns:1fr}
  .qr-pop{position:fixed;left:50%;top:50%;right:auto;transform:translate(-50%,-46%)}
  .coop-card:hover .qr-pop,.coop-card.open .qr-pop{transform:translate(-50%,-50%)}
}
@media (max-width:430px){
  .ht-specs{grid-template-columns:1fr 1fr;gap:12px}
}


/* ============================================================
   V2.1.1 - Hero 图片兜底 + 导航防折行（追加）
   ============================================================ */
.hero-bg-img{
  position:absolute;inset:0;z-index:0;
  background:url("../images/scene-2-sport.jpg") center 28%/cover no-repeat;
  animation:heroZoom 22s ease-in-out infinite alternate;
}
@keyframes heroZoom{from{transform:scale(1)}to{transform:scale(1.08)}}
.hero-video{z-index:1;opacity:0;transition:opacity .9s ease}
.hero-video.playing{opacity:1}
.hero-mask{z-index:2}
.hero-inner{z-index:3}

/* 导航：禁止文字折行（窄窗口下避免出现竖排字体） */
.main-nav > a,.nav-drop-trigger{white-space:nowrap}
@media (max-width:1280px){
  .header-cta{display:none}
  .header-ring-app{display:none}
  .header-right{gap:8px}
  .main-nav > a,.nav-drop-trigger{padding:10px 12px;font-size:14px}
}
@media (max-width:430px){
  .hero-bg-img{background-position:center 22%}
}


/* ============================================================
   V2.1.2 - 导航布局加固（Logo/右侧防压缩 + 1200px 以下切换汉堡菜单）
   ============================================================ */
.logo,.header-right{flex-shrink:0}
@media (max-width:1200px){
  .main-nav{
    position:fixed;top:calc(var(--header-h) + 6px);right:8px;left:auto;bottom:auto;
    width:min(240px,72vw);
    max-height:calc(100vh - var(--header-h) - 20px);
    background:#fff;flex-direction:column;align-items:stretch;padding:10px;
    border:1px solid var(--line);border-radius:14px;
    box-shadow:0 12px 40px rgba(20,22,26,.18);overflow-y:auto;z-index:1200;
    display:none;
  }
  .main-nav.open{display:flex !important}
  .main-nav > a,.nav-drop-trigger{padding:12px 14px;font-size:14.5px;border-radius:8px;flex-shrink:0;display:flex;align-items:center;justify-content:space-between;color:var(--text) !important}
  .nav-drop{display:block}
  .nav-drop-trigger::after{content:"\203A";font-size:18px;color:var(--text-3);transition:transform .25s;margin-left:8px}
  .nav-drop.open .nav-drop-trigger::after{transform:rotate(90deg)}
  .nav-drop-menu{position:static !important;transform:none !important;opacity:1 !important;visibility:visible !important;box-shadow:none !important;border:0 !important;background:var(--bg-soft) !important;margin:3px 0 5px !important;padding:3px !important;border-radius:8px !important;display:none !important}
  .nav-drop:hover .nav-drop-menu,.nav-drop:focus-within .nav-drop-menu{display:none !important}
  .nav-drop.open .nav-drop-menu{display:block !important}
  .nav-drop-menu a{display:block !important;padding:10px 14px !important;font-size:13.5px !important;color:var(--text-2) !important;flex-shrink:0;border-radius:6px}
  .nav-drop-menu a:hover{color:var(--accent) !important;background:rgba(2,187,93,.08)}
  .nav-toggle{display:flex}
}


/* ============================================================
   V2.2 - 业务合作导航二维码 + 联系区（追加）
   ============================================================ */

/* 导航“业务合作”二维码弹层 */
.nav-qr{
  position:absolute;top:calc(100% + 12px);left:50%;transform:translateX(-50%) translateY(8px);
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px;
  box-shadow:var(--shadow-lg);display:flex;flex-direction:column;align-items:center;gap:9px;
  opacity:0;visibility:hidden;transition:.25s ease;z-index:60;
}
.nav-drop:hover .nav-qr,.nav-drop:focus-within .nav-qr,.nav-drop.open .nav-qr{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.nav-qr img{width:168px;height:168px;border-radius:10px}
.nav-qr span{font-size:12.5px;color:var(--text-2);font-weight:600;white-space:nowrap}

/* 联系区（去掉询盘表单后单列布局） */
.contact-inner{grid-template-columns:1fr;max-width:940px}
.contact-cards{grid-template-columns:repeat(2,1fr);gap:14px}
.coop-card{grid-column:1/-1;max-width:420px}
@media (max-width:768px){
  .contact-cards{grid-template-columns:1fr;gap:16px}
  .nav-qr{position:static !important;transform:none !important;box-shadow:none !important;border:0 !important;background:var(--bg-soft) !important;margin:4px 0 6px !important;padding:10px !important;display:none !important;opacity:1 !important;visibility:visible !important;min-width:0 !important;align-items:center !important}
  .nav-drop:hover .nav-qr,.nav-drop:focus-within .nav-qr{display:none !important}
  .nav-drop.open .nav-qr{display:flex !important}
  .nav-qr img{width:140px !important;height:140px !important}
  .nav-qr span{font-size:12px !important;white-space:normal !important;text-align:center}
}
@media (max-width:1200px){
  .nav-qr{position:static !important;transform:none !important;box-shadow:none !important;border:0 !important;background:var(--bg-soft) !important;margin:4px 0 6px !important;padding:10px !important;display:none !important;opacity:1 !important;visibility:visible !important;min-width:0 !important;align-items:center !important}
  .nav-drop:hover .nav-qr,.nav-drop:focus-within .nav-qr{display:none !important}
  .nav-drop.open .nav-qr{display:flex !important}
  .nav-qr img{width:140px !important;height:140px !important}
  .nav-qr span{font-size:12px !important;white-space:normal !important;text-align:center}
}


/* ============================================================
   V2.3 - 联系我们：浅色背景（与上方“从数据采集，到智能分析”白底保持一致）
   ============================================================ */
.contact{background:var(--bg);color:var(--text)}
.contact::before{background:none}
.contact-info .sec-title{color:var(--text)}
.contact-info > p{color:var(--text-2)}
.contact-card{background:#fff;border-color:var(--line)}
.contact-card:hover{border-color:rgba(2,187,93,.5);background:var(--bg-soft)}
.contact-card .contact-ic{background:var(--accent-soft);color:var(--accent)}
.contact-card b{color:var(--text-3)}
.contact-card span{color:var(--text)}
.contact-card .todo-mark{color:var(--text-3);border-color:var(--line)}


/* ============================================================
   V2.4 - 首页 AI 健康熵减平台板块
   ============================================================ */
.platform{background:var(--bg-soft);color:var(--text);position:relative;overflow:hidden}
.platform::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(680px 460px at 82% 20%,rgba(2,187,93,.07),transparent 62%),
             radial-gradient(480px 360px at 8% 88%,rgba(2,187,93,.05),transparent 60%);
}
.platform .sec-tag{color:var(--accent)}
.platform .sec-title{color:var(--text)}
.platform .sec-sub{color:var(--text-2);max-width:720px}
.platform .sec-head.center .sec-sub{margin-left:auto;margin-right:auto}
.platform-grid{
  position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-bottom:48px;
}
.platform-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:32px 26px;transition:transform .3s ease,background .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.platform-card:hover{transform:translateY(-6px);background:#fff;border-color:rgba(2,187,93,.3);box-shadow:var(--shadow-md)}
.platform-num{
  display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:12px;
  font-size:16px;font-weight:800;color:#fff;background:var(--accent);margin-bottom:18px;
}
.platform-card h3{font-size:18px;font-weight:700;color:var(--text);margin-bottom:8px}
.platform-card p{font-size:14px;color:var(--text-2);line-height:1.7}
.platform-cta{position:relative;text-align:center}
@media (max-width:960px){
  .platform-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
  .platform-grid{gap:14px;margin-bottom:36px}
  .platform-card{padding:24px 20px}
  .platform-card h3{font-size:16px}
  .platform-card p{font-size:13px}
  .platform-num{width:36px;height:36px;font-size:14px;margin-bottom:14px}
}
@media (max-width:560px){
  .platform-grid{grid-template-columns:1fr}
}
@media (max-width:430px){
  .platform-card{padding:20px 16px}
  .platform-card h3{font-size:15px}
  .platform-card p{font-size:12.5px;line-height:1.65}
}


/* ============================================================
   V2.5 - 首页资讯预览板块
   ============================================================ */
.news-preview{background:var(--bg-soft)}
.news-preview-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-bottom:44px;
}
.news-preview-card{
  display:flex;align-items:stretch;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.news-preview-card:hover{
  transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:transparent;
}
.news-preview-date{
  flex:0 0 76px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  background:var(--accent-soft);color:var(--accent);padding:18px 10px;
}
.news-preview-date b{font-size:26px;font-weight:800;line-height:1}
.news-preview-date span{font-size:11.5px;font-weight:600;margin-top:4px;opacity:.8}
.news-preview-body{
  flex:1;padding:20px 22px;display:flex;flex-direction:column;justify-content:center;
}
.news-preview-cat{
  display:inline-block;width:fit-content;font-size:11px;font-weight:700;
  letter-spacing:1px;color:var(--accent);background:var(--accent-soft);
  padding:3px 9px;border-radius:999px;margin-bottom:10px;
}
.news-preview-body h3{
  font-size:15px;font-weight:700;color:var(--text);line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-preview-cta{text-align:center}
@media (max-width:860px){
  .news-preview-grid{grid-template-columns:1fr}
}
@media (max-width:430px){
  .news-preview-date{flex:0 0 64px;padding:14px 6px}
  .news-preview-date b{font-size:22px}
  .news-preview-date span{font-size:10.5px}
  .news-preview-body{padding:16px 14px}
  .news-preview-body h3{font-size:13.5px;line-height:1.5}
  .news-preview-cat{font-size:10px;padding:2px 7px;margin-bottom:8px}
}