/* ============================================================
   恒生脉联 · 官网视觉系统（深空科技风）
   ============================================================ */
*{margin:0;padding:0;box-sizing:border-box}

:root{
  --bg:#04060f;
  --bg-2:#070c1a;
  --panel:rgba(255,255,255,.045);
  --panel-2:rgba(255,255,255,.07);
  --line:rgba(255,255,255,.10);
  --line-2:rgba(255,255,255,.18);
  --ink:#eaf2ff;
  --muted:#93a6c8;
  --cyan:#22d3ee;
  --blue:#4b8dff;
  --violet:#a86bff;
  --emerald:#2fe0a8;
  --amber:#ffb057;
  --grad:linear-gradient(100deg,#22d3ee,#4b8dff 45%,#a86bff);
  --grad-soft:linear-gradient(140deg,rgba(34,211,238,.18),rgba(75,141,255,.10) 45%,rgba(168,107,255,.16));
  --mono:ui-monospace,SFMono-Regular,"JetBrains Mono",Menlo,Consolas,monospace;
  --r:18px;
  --shadow:0 24px 60px rgba(2,8,26,.55);
}

html{scroll-behavior:smooth;scroll-padding-top:90px}
body{
  background:var(--bg);
  color:var(--ink);
  font:16px/1.75 "PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
b,strong{font-weight:800}
main,header,footer{position:relative;z-index:2}

/* ---------- 背景装饰层 ---------- */
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(900px 620px at 12% -8%,rgba(34,211,238,.16),transparent 60%),
    radial-gradient(880px 640px at 88% 4%,rgba(168,107,255,.16),transparent 62%),
    radial-gradient(1200px 800px at 50% 108%,rgba(75,141,255,.14),transparent 65%),
    linear-gradient(180deg,#04060f,#060b18 45%,#04060f);
}
.fx-canvas{position:fixed;inset:0;z-index:1;width:100%;height:100%;opacity:.75;pointer-events:none}
.fx-grid{
  position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:70px 70px;
  -webkit-mask-image:radial-gradient(circle at 50% 22%,#000 0%,rgba(0,0,0,.35) 45%,transparent 78%);
  mask-image:radial-gradient(circle at 50% 22%,#000 0%,rgba(0,0,0,.35) 45%,transparent 78%);
}
/* 原本这里用 filter:blur(80px) 做柔边。三个 500px 级的模糊图层 + 无限动画，
   会让浏览器每帧重新栅格化，是移动端滑动卡顿的头号元凶。
   改用多段径向渐变自身做柔边，视觉几乎一致，成本降为原来的零头。 */
.fx-orb{position:fixed;z-index:0;pointer-events:none;border-radius:50%;opacity:.5;will-change:transform;transform:translateZ(0)}
.orb-a{width:520px;height:520px;top:-160px;left:-120px;background:radial-gradient(circle,rgba(34,211,238,.55),rgba(34,211,238,.30) 34%,rgba(34,211,238,.11) 56%,rgba(34,211,238,.03) 76%,transparent 92%);animation:float1 18s ease-in-out infinite}
.orb-b{width:620px;height:620px;top:18%;right:-200px;background:radial-gradient(circle,rgba(168,107,255,.5),rgba(168,107,255,.27) 34%,rgba(168,107,255,.10) 56%,rgba(168,107,255,.03) 76%,transparent 92%);animation:float2 22s ease-in-out infinite}
.orb-c{width:560px;height:560px;bottom:-180px;left:30%;background:radial-gradient(circle,rgba(47,224,168,.35),rgba(47,224,168,.19) 34%,rgba(47,224,168,.07) 56%,rgba(47,224,168,.02) 76%,transparent 94%);animation:float1 26s ease-in-out infinite reverse}
@keyframes float1{50%{transform:translate3d(60px,50px,0) scale(1.08)}}
@keyframes float2{50%{transform:translate3d(-70px,40px,0) scale(1.1)}}

.cursor-glow{
  position:fixed;z-index:1;width:520px;height:520px;left:0;top:0;pointer-events:none;
  border-radius:50%;opacity:0;transition:opacity .4s;
  background:radial-gradient(circle,rgba(34,211,238,.16),rgba(75,141,255,.08) 40%,transparent 66%);
  transform:translate3d(-50%,-50%,0);
}
body.has-cursor .cursor-glow{opacity:1}

/* ---------- 导航 ---------- */
.nav{
  position:sticky;top:0;z-index:20;display:flex;justify-content:space-between;align-items:center;
  padding:14px 5%;gap:20px;
  background:rgba(4,7,15,.55);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid transparent;transition:.35s;
}
.nav.scrolled{background:rgba(4,7,15,.86);border-bottom-color:var(--line);box-shadow:0 12px 40px rgba(0,0,0,.5)}
.nav::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(34,211,238,.55),rgba(168,107,255,.55),transparent);
  opacity:.55;
}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:.5px}
.logo-mark{
  width:36px;height:36px;border-radius:11px;display:grid;place-items:center;color:#03101f;font-weight:900;
  background:var(--grad);box-shadow:0 0 24px rgba(34,211,238,.45);
}
.nav-links{display:flex;gap:6px;font-size:14.5px;flex-wrap:wrap;justify-content:flex-end}
.nav-links a{
  position:relative;padding:8px 12px;border-radius:999px;color:var(--muted);transition:.25s;
}
.nav-links a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:3px;height:1px;background:var(--grad);
  transform:scaleX(0);transform-origin:left;transition:.3s;
}
.nav-links a:hover{color:#fff;background:var(--panel)}
.nav-links a:hover::after,.nav-links a.on::after{transform:scaleX(1)}
.nav-links a.on{color:#fff}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:0 0 90px;isolation:isolate}
.hero-bg{position:absolute;inset:0;z-index:-2}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.30;filter:saturate(.9) contrast(1.05)}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(4,6,15,.72),rgba(4,6,15,.86) 55%,var(--bg)),
             radial-gradient(700px 420px at 78% 30%,rgba(34,211,238,.22),transparent 65%);
}
.hero-scan{
  position:absolute;inset:0;z-index:-1;pointer-events:none;opacity:.5;
  background:repeating-linear-gradient(180deg,rgba(255,255,255,.045) 0 1px,transparent 1px 5px);
  -webkit-mask-image:linear-gradient(180deg,transparent,#000 30%,#000 70%,transparent);
  mask-image:linear-gradient(180deg,transparent,#000 30%,#000 70%,transparent);
}
.hero-inner{width:min(1180px,90%);margin:auto;padding:112px 0 30px}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;font:600 13px/1 var(--mono);letter-spacing:2px;
  color:#bfe9ff;padding:9px 16px;border:1px solid var(--line-2);border-radius:999px;
  background:rgba(34,211,238,.07);backdrop-filter:blur(6px);
}
.pulse{width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 0 rgba(34,211,238,.7);animation:pulse 2s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 12px rgba(34,211,238,0)}100%{box-shadow:0 0 0 0 rgba(34,211,238,0)}}
.hero h1{
  margin-top:26px;font-size:clamp(38px,6.4vw,78px);line-height:1.1;font-weight:900;letter-spacing:-1px;
  text-shadow:0 20px 60px rgba(0,0,0,.5);
}
.grad{
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
  background-size:220% 100%;animation:shimmer 7s linear infinite;
}
@keyframes shimmer{to{background-position:220% 0}}
.hero-sub{max-width:660px;margin-top:22px;font-size:17px;color:#c3d3ec}
.hero-btns{display:flex;gap:14px;margin-top:36px;flex-wrap:wrap}
.btn{
  position:relative;display:inline-flex;align-items:center;gap:9px;overflow:hidden;
  padding:14px 30px;border-radius:999px;font-weight:700;font-size:15px;transition:.3s;
}
.btn .arr{transition:.3s}
.btn-primary{color:#03101f;background:var(--grad);background-size:200% 100%;box-shadow:0 12px 36px rgba(34,211,238,.32)}
.btn-primary:hover{background-position:100% 0;transform:translateY(-2px);box-shadow:0 18px 46px rgba(75,141,255,.45)}
.btn-primary:hover .arr{transform:translateX(5px)}
.btn-ghost{border:1px solid var(--line-2);background:rgba(255,255,255,.04);color:#e7f1ff;backdrop-filter:blur(8px)}
.btn-ghost:hover{border-color:rgba(34,211,238,.65);background:rgba(34,211,238,.10);transform:translateY(-2px)}
.hero-stats{
  display:flex;flex-wrap:wrap;gap:18px;width:min(1180px,90%);margin:64px auto 0;
}
.hstat{
  flex:1 1 200px;padding:22px 26px;border-radius:var(--r);border:1px solid var(--line);
  background:linear-gradient(150deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  backdrop-filter:blur(12px);position:relative;overflow:hidden;
}
.hstat::before{content:"";position:absolute;inset:0 0 auto;height:2px;background:var(--grad);opacity:.9}
.hstat b{display:block;font:800 38px/1.1 var(--mono);letter-spacing:-1px}
.hstat span{font-size:13.5px;color:var(--muted);letter-spacing:1px}
.hstat:nth-child(1) b{color:#7fe7ff}
.hstat:nth-child(2) b{color:#9dbcff}
.hstat:nth-child(3) b{color:#caa6ff}

/* ---------- 通用区块 ---------- */
.sec{padding:104px 0;position:relative}
.sec.alt{
  background:linear-gradient(180deg,rgba(255,255,255,.022),rgba(255,255,255,.045) 50%,rgba(255,255,255,.022));
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.sec.dark{
  background:
    radial-gradient(760px 420px at 20% 0%,rgba(34,211,238,.14),transparent 62%),
    radial-gradient(700px 420px at 88% 100%,rgba(168,107,255,.16),transparent 65%),
    linear-gradient(160deg,#050a18,#081026 55%,#060b1a);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.wrap{width:min(1180px,90%);margin:auto;position:relative}
.tag{
  display:inline-flex;align-items:center;gap:10px;font:600 13px/1 var(--mono);letter-spacing:2.5px;
  color:#8fe4ff;margin-bottom:16px;
}
.tag::before{content:"";width:22px;height:2px;background:var(--grad);border-radius:2px;box-shadow:0 0 12px rgba(34,211,238,.8)}
.sec h2{font-size:clamp(27px,3.6vw,44px);line-height:1.25;font-weight:900;letter-spacing:-.5px}
.sec h2 .grad{animation-duration:9s}
.lead{max-width:840px;margin-top:18px;color:var(--muted);font-size:16.5px}
.sub{
  margin-top:62px;font-size:21px;font-weight:800;display:flex;align-items:center;gap:12px;letter-spacing:.5px;
}
.sub::before{content:"";width:6px;height:26px;border-radius:3px;background:var(--grad);box-shadow:0 0 18px rgba(34,211,238,.7)}
.note{
  margin-top:30px;padding:18px 24px;border-radius:0 14px 14px 0;position:relative;
  background:linear-gradient(90deg,rgba(34,211,238,.13),rgba(34,211,238,.02));
  border-left:3px solid var(--cyan);color:#cfe0f8;font-size:15px;box-shadow:inset 0 0 40px rgba(34,211,238,.05);
}

/* ---------- 网格与卡片 ---------- */
.grid{display:grid;gap:22px;margin-top:44px}
.g4{grid-template-columns:repeat(4,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.card{
  position:relative;padding:28px 26px;border-radius:var(--r);overflow:hidden;
  background:linear-gradient(155deg,rgba(255,255,255,.07),rgba(255,255,255,.022));
  border:1px solid var(--line);backdrop-filter:blur(10px);
  transition:transform .38s cubic-bezier(.2,.7,.2,1),box-shadow .38s,border-color .38s;
}
.card::before{
  content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;opacity:0;transition:.38s;
  background:linear-gradient(140deg,rgba(34,211,238,.75),rgba(75,141,255,.25) 42%,rgba(168,107,255,.75));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  mask-composite:exclude;pointer-events:none;
}
.card::after{
  content:"";position:absolute;width:220px;height:220px;right:-90px;top:-110px;border-radius:50%;
  background:radial-gradient(circle,rgba(34,211,238,.28),transparent 68%);opacity:0;transition:.45s;
}
.card:hover{transform:translateY(-8px);box-shadow:var(--shadow);border-color:transparent}
.card:hover::before,.card:hover::after{opacity:1}
.card h3{font-size:19px;margin-bottom:10px;position:relative;z-index:1}
.card p{color:var(--muted);font-size:15px;position:relative;z-index:1}
.idx{
  display:inline-block;font:700 12px/1 var(--mono);letter-spacing:1px;color:#8fe4ff;
  padding:5px 9px;border-radius:8px;margin-bottom:14px;border:1px solid rgba(34,211,238,.32);
  background:rgba(34,211,238,.09);position:relative;z-index:1;
}

/* ---------- 四步流程 ---------- */
.steps{margin-top:38px;display:grid;gap:16px;list-style:none;counter-reset:s}
.steps li{
  position:relative;padding:20px 24px 20px 76px;border-radius:16px;counter-increment:s;
  background:linear-gradient(120deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  border:1px solid var(--line);backdrop-filter:blur(10px);transition:.35s;
}
.steps li:hover{transform:translateX(6px);border-color:rgba(34,211,238,.45);box-shadow:var(--shadow)}
.steps li::before{
  content:counter(s,decimal-leading-zero);position:absolute;left:22px;top:50%;transform:translateY(-50%);
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  font:800 14px/1 var(--mono);color:#03101f;background:var(--grad);box-shadow:0 0 22px rgba(34,211,238,.5);
}
.steps b{display:block;font-size:17.5px}
.steps span{color:var(--muted);font-size:15px}

/* ---------- 截图相框 ---------- */
.shot{
  margin-top:46px;border-radius:20px;overflow:hidden;border:1px solid var(--line-2);
  background:linear-gradient(160deg,rgba(255,255,255,.09),rgba(255,255,255,.03));
  box-shadow:0 30px 90px rgba(0,0,0,.6),0 0 0 1px rgba(34,211,238,.12);
}
.shot-bar{display:flex;align-items:center;gap:8px;padding:12px 18px;border-bottom:1px solid var(--line);background:rgba(4,8,18,.55)}
.shot-bar i{width:10px;height:10px;border-radius:50%;background:var(--line-2)}
.shot-bar i:nth-child(1){background:rgba(255,120,120,.85)}
.shot-bar i:nth-child(2){background:rgba(255,187,90,.85)}
.shot-bar i:nth-child(3){background:rgba(90,220,160,.85)}
.shot-bar em{margin-left:12px;font:600 11.5px/1 var(--mono);letter-spacing:2px;color:var(--muted);font-style:normal}
.shot img{width:100%}
.shot figcaption{
  padding:15px 20px;font-size:14px;color:var(--muted);border-top:1px solid var(--line);
  background:rgba(4,8,18,.4);font-family:var(--mono);letter-spacing:.5px;
}

/* ---------- 知识库指标 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:40px}
.stats div{
  position:relative;padding:22px 22px;border-radius:16px;overflow:hidden;
  background:linear-gradient(150deg,rgba(255,255,255,.075),rgba(255,255,255,.022));
  border:1px solid var(--line);backdrop-filter:blur(10px);transition:.35s;
}
.stats div::after{content:"";position:absolute;left:0;bottom:0;height:3px;width:100%;background:var(--grad);transform:scaleX(.25);transform-origin:left;transition:.5s}
.stats div:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.stats div:hover::after{transform:scaleX(1)}
.stats b{display:block;font:800 27px/1.2 var(--mono);letter-spacing:-.5px;color:#7fe7ff}
.stats span{font-size:13px;color:var(--muted)}

/* ---------- 四诊仪 ---------- */
.device-hero{
  margin-top:44px;border-radius:22px;padding:16px;position:relative;overflow:hidden;
  background:linear-gradient(150deg,rgba(255,255,255,.10),rgba(255,255,255,.03));
  border:1px solid var(--line-2);box-shadow:0 30px 90px rgba(0,0,0,.6),0 0 60px rgba(34,211,238,.10) inset;
}
.device-hero img{width:100%;border-radius:14px}
.dev-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:40px}
.panel{
  position:relative;padding:28px 26px;border-radius:var(--r);
  background:linear-gradient(150deg,rgba(255,255,255,.075),rgba(255,255,255,.022));
  border:1px solid var(--line);backdrop-filter:blur(10px);transition:.35s;
}
.panel:hover{border-color:rgba(34,211,238,.45);box-shadow:var(--shadow);transform:translateY(-6px)}
.panel h3{font-size:19px;margin-bottom:16px;color:#fff}
.panel h3::after{content:"";display:block;width:56px;height:3px;border-radius:3px;background:var(--grad);margin-top:12px}
.panel ul{list-style:none;display:grid;gap:12px}
.panel li{position:relative;padding-left:24px;color:rgba(255,255,255,.86);font-size:15px}
.panel li::before{
  content:"";position:absolute;left:2px;top:10px;width:8px;height:8px;border-radius:2px;
  background:var(--cyan);box-shadow:0 0 12px rgba(34,211,238,.9);transform:rotate(45deg);
}

/* ---------- 页脚 ---------- */
.foot{
  padding:96px 0 60px;position:relative;overflow:hidden;text-align:center;
  background:
    radial-gradient(700px 380px at 50% -10%,rgba(34,211,238,.18),transparent 62%),
    linear-gradient(180deg,#050915,#03050c);
  border-top:1px solid var(--line);
}
.foot h2{font-size:clamp(26px,3.4vw,40px);font-weight:900}
.contact{
  display:flex;align-items:center;gap:44px;max-width:760px;margin:40px auto 0;padding:34px 42px;
  border-radius:24px;text-align:left;border:1px solid var(--line-2);backdrop-filter:blur(14px);
  background:linear-gradient(150deg,rgba(255,255,255,.085),rgba(255,255,255,.025));
  box-shadow:var(--shadow);
}
.contact-info h3{font-size:16px;color:var(--muted);font-weight:600}
.contact-info .tel{
  display:inline-block;margin-top:10px;font:800 28px/1 var(--mono);letter-spacing:1px;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.contact-qr{flex:0 0 auto;text-align:center}
.contact-qr img{width:132px;height:132px;border-radius:16px;background:#fff;padding:8px}
.contact-qr span{display:block;margin-top:10px;font-size:13px;color:var(--muted)}
.muted{font-size:14px;color:var(--muted);margin-top:22px}
.copy{margin-top:26px;font-size:13px;letter-spacing:.5px;color:rgba(147,166,200,.6)}

/* ---------- 滚动揭示 ---------- */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .55s cubic-bezier(.2,.7,.2,1),transform .55s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
.grid .reveal:nth-child(2){transition-delay:.09s}
.grid .reveal:nth-child(3){transition-delay:.18s}
.grid .reveal:nth-child(4){transition-delay:.27s}
.grid .reveal:nth-child(5){transition-delay:.36s}
.grid .reveal:nth-child(6){transition-delay:.45s}
.grid .reveal:nth-child(7){transition-delay:.54s}
.steps .reveal:nth-child(2){transition-delay:.09s}
.steps .reveal:nth-child(3){transition-delay:.18s}
.steps .reveal:nth-child(4){transition-delay:.27s}

/* ---------- 响应式 ---------- */
@media(max-width:1100px){
  .g4{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:900px){
  .g4,.g3,.dev-grid{grid-template-columns:1fr}
  .nav-links{display:none}
  .sec{padding:76px 0}
  .hero-inner{padding:84px 0 24px}
  .stats{grid-template-columns:repeat(2,1fr)}
  .hero-stats{gap:14px}
}
@media(max-width:640px){
  .contact{flex-direction:column;gap:28px;padding:30px 24px;text-align:center}
  .steps li{padding:18px 18px 18px 68px}
  .hstat{padding:18px 20px}
  .hstat b{font-size:30px}
}
.burger{display:none;width:44px;height:44px;border:1px solid var(--line-2);border-radius:12px;background:rgba(255,255,255,.05);cursor:pointer;padding:0}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.01ms!important}
  .reveal{opacity:1;transform:none}
}

/* ---------- 移动端（安卓 / iOS）适配 ---------- */
.burger span{display:block;width:20px;height:2px;border-radius:2px;background:#eaf2ff;margin:2px auto;transition:.3s}
.burger.on span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.burger.on span:nth-child(2){opacity:0}
.burger.on span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-glass{position:fixed;inset:0;z-index:15;background:rgba(3,6,14,.55);opacity:0;pointer-events:none;transition:.3s}
body.menu-open .nav-glass{opacity:1;pointer-events:auto}
/* 移动端细化样式见 css/mobile.css */

/* ============================================================
   已合作机构 · 无缝横向滚动
   实现要点：轨道内放两份完全相同的名单，位移 -50% 时刚好等于一份宽度，
   因此循环点无接缝；动画只用 transform，走合成器，不触发重排重绘。
   ============================================================ */
.clients-band{
  position:relative;z-index:2;padding:70px 0 76px;
  background:linear-gradient(180deg,rgba(255,255,255,.02),rgba(255,255,255,.045));
  border-top:1px solid var(--line);
}
.clients-title{font:600 13px/1 var(--mono);letter-spacing:2.5px;color:#8fe4ff;text-align:center}
.clients-sub{margin-top:12px;font-size:13.5px;color:var(--muted);text-align:center;letter-spacing:.5px}
.clients-viewport{
  margin-top:30px;overflow:hidden;position:relative;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 7%,#000 93%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 7%,#000 93%,transparent);
}
.clients-track{
  display:flex;width:max-content;
  animation:marquee 46s linear infinite;
  will-change:transform;
}
.clients-track.is-paused,.clients-track:hover{animation-play-state:paused}
.clients-list{display:flex;gap:14px;list-style:none;padding:0 7px}
.clients-list li{
  flex:0 0 auto;white-space:nowrap;padding:14px 24px;border-radius:999px;font-size:14.5px;color:#dbe7fb;
  border:1px solid var(--line);
  background:linear-gradient(140deg,rgba(255,255,255,.075),rgba(255,255,255,.022));
}
@keyframes marquee{from{transform:translate3d(0,0,0)}to{transform:translate3d(-50%,0,0)}}

/* ============================================================
   四诊仪讲解视频
   ============================================================ */
.vcard{
  display:grid;grid-template-columns:auto minmax(0,1fr);gap:34px;align-items:center;
  margin-top:44px;padding:26px;border-radius:22px;
  border:1px solid var(--line-2);
  background:linear-gradient(150deg,rgba(255,255,255,.10),rgba(255,255,255,.03));
  box-shadow:0 30px 90px rgba(0,0,0,.55);
}
.vcover{
  position:relative;display:block;width:216px;padding:0;border:0;cursor:pointer;overflow:hidden;
  border-radius:16px;background:#000;line-height:0;
  -webkit-tap-highlight-color:transparent;transition:transform .3s;
}
.vcover img{width:100%;height:auto;display:block;border-radius:16px}
.vcover::after{
  content:"";position:absolute;inset:0;border-radius:16px;transition:.3s;
  background:linear-gradient(180deg,rgba(2,6,16,.12),rgba(2,6,16,.58));
}
.vcover:hover{transform:translateY(-3px)}
.vcover:hover::after{background:linear-gradient(180deg,rgba(2,6,16,.04),rgba(2,6,16,.42))}
.vplay{
  position:absolute;left:50%;top:50%;z-index:1;width:62px;height:62px;border-radius:50%;
  transform:translate(-50%,-50%) scale(1);transition:transform .3s;
  background:var(--grad);box-shadow:0 12px 34px rgba(34,211,238,.55);
}
.vplay::before{
  content:"";position:absolute;left:50%;top:50%;margin:-12px 0 0 -8px;
  border-left:20px solid #03101f;border-top:12px solid transparent;border-bottom:12px solid transparent;
}
.vcover:hover .vplay{transform:translate(-50%,-50%) scale(1.08)}
.vbody{min-width:0}
.vtag{font:600 12.5px/1 var(--mono);letter-spacing:2.5px;color:#8fe4ff;margin-bottom:14px}
.vbody h3{font-size:23px;font-weight:800;letter-spacing:.3px}
.vdesc{margin-top:14px;color:var(--muted);font-size:15.5px}
.vmeta{display:flex;flex-wrap:wrap;gap:10px;list-style:none;margin-top:18px}
.vmeta li{
  font:600 12.5px/1 var(--mono);letter-spacing:.5px;color:#bfe9ff;
  padding:8px 13px;border-radius:8px;border:1px solid rgba(34,211,238,.3);background:rgba(34,211,238,.08);
}
.vbody .btn{margin-top:24px}

/* 视频浮层：刻意不用 backdrop-filter —— 视频播放时已占满 GPU，再叠一层模糊会互相抢资源 */
.vmodal{
  position:fixed;inset:0;z-index:60;display:none;place-items:center;padding:18px;
  background:rgba(2,4,10,.95);
}
.vmodal.on{display:grid}
html.video-open{overflow:hidden}
.vmodal video{
  max-width:100%;max-height:88vh;width:auto;height:auto;
  border-radius:14px;background:#000;box-shadow:0 30px 90px rgba(0,0,0,.85);
}
.vmodal-close{
  position:absolute;top:calc(14px + env(safe-area-inset-top));right:14px;z-index:1;
  width:44px;height:44px;border-radius:50%;cursor:pointer;padding:0;
  border:1px solid var(--line-2);background:rgba(255,255,255,.09);
  color:#eaf2ff;font-size:24px;line-height:1;
  -webkit-tap-highlight-color:transparent;
}
.vmodal-close:hover{background:rgba(255,255,255,.16)}