/* ============================================================
   HKIG IMMUNE TECHNOLOGY — Official Website
   Visual system: Brand orange + graphite grey (from brand logo
   #F36E1F / deck accent #F47920 / logo grey #80787B)
   ============================================================ */

:root{
  /* Brand */
  --brand:#F47920;
  --brand-hover:#E06A12;
  --brand-deep:#B84510;
  --brand-soft:#FBF0E8;
  --brand-tint:rgba(244,121,32,.12);

  /* Greys — structural base */
  --ink:#2D2D2D;
  --ink-soft:#333333;
  --grey:#80787B;
  --grey-600:#666666;
  --grey-500:#8A8285;
  --grey-400:#999999;
  --line:#E0E0E0;
  --line-soft:#EDEDED;
  --bg:#FFFFFF;
  --bg-soft:#F5F5F5;
  --bg-warm:#FAF8F6;

  /* Dark surfaces */
  --dark:#242426;
  --dark-2:#171719;
  --dark-3:#101011;

  /* Metrics */
  --maxw:1200px;
  --gutter:clamp(20px,5vw,48px);
  --radius:14px;
  --radius-lg:20px;
  --header-h:78px;

  --shadow-sm:0 2px 10px rgba(45,45,45,.05);
  --shadow:0 10px 34px rgba(45,45,45,.09);
  --shadow-lg:0 22px 60px rgba(45,45,45,.14);

  --ease:cubic-bezier(.22,.61,.36,1);
  --font:"Inter","Segoe UI",-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:var(--header-h);-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--font);
  color:var(--ink);background:var(--bg);
  font-size:16px;line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;line-height:1.22;letter-spacing:-.015em;font-weight:700}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button,input,select,textarea{font-family:inherit;font-size:inherit}

/* ---------- Layout primitives ---------- */
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding-inline:var(--gutter)}
section{padding:clamp(64px,9vw,116px) 0;position:relative}
.sec-head{max-width:760px;margin-bottom:clamp(36px,5vw,60px)}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;
  color:var(--brand);margin-bottom:16px;
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--brand);border-radius:2px}
.sec-head h2{font-size:clamp(28px,3.6vw,42px);color:var(--ink)}
.sec-head p{margin-top:18px;color:var(--grey-600);font-size:clamp(15px,1.4vw,17.5px)}
.sec-head.center{margin-inline:auto;text-align:center}
.sec-head.center .eyebrow{justify-content:center}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:14px 26px;border-radius:999px;border:1px solid transparent;
  font-weight:600;font-size:15px;cursor:pointer;transition:all .28s var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 22px rgba(244,121,32,.28)}
.btn-primary:hover{background:var(--brand-hover);transform:translateY(-2px);box-shadow:0 14px 30px rgba(244,121,32,.34)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.34)}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.btn-outline{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand)}
.btn .arw{transition:transform .28s var(--ease)}
.btn:hover .arw{transform:translateX(4px)}

/* ============================================================
   HEADER
   ============================================================ */
.header{
  position:fixed;inset:0 0 auto 0;height:var(--header-h);z-index:100;
  transition:background .35s var(--ease),box-shadow .35s var(--ease),height .35s var(--ease);
}
.header .wrap{height:100%;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:14px;flex:0 0 auto}
.brand img{height:44px;width:auto;transition:height .35s var(--ease)}
.brand .logo-dark{display:block}
.brand .logo-light{display:none}
.brand-txt{display:none}
.header.is-scrolled{
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  box-shadow:0 4px 22px rgba(45,45,45,.08);height:68px;
}
.header.is-scrolled .brand .logo-dark{display:none}
.header.is-scrolled .brand .logo-light{display:block}
.header.is-scrolled .brand img{height:38px}

.nav{display:flex;align-items:center;gap:6px}
.nav a{
  position:relative;padding:9px 13px;font-size:14.5px;font-weight:500;
  color:rgba(255,255,255,.86);border-radius:8px;transition:color .25s,background .25s;
}
.nav a::after{
  content:"";position:absolute;left:13px;right:13px;bottom:4px;height:2px;
  background:var(--brand);border-radius:2px;transform:scaleX(0);transform-origin:left;
  transition:transform .3s var(--ease);
}
.nav a:hover::after,.nav a.active::after{transform:scaleX(1)}
.nav a:hover{color:#fff}
.header.is-scrolled .nav a{color:var(--ink-soft)}
.header.is-scrolled .nav a:hover,.header.is-scrolled .nav a.active{color:var(--brand)}
.header-cta{display:flex;align-items:center;gap:14px}
.header-cta .btn{padding:11px 20px;font-size:14px}
.header-cta .btn-ghost{border-color:rgba(255,255,255,.4)}
.header.is-scrolled .header-cta .btn-ghost{color:var(--ink);border-color:var(--line)}
.header.is-scrolled .header-cta .btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-tint)}

/* Language switch (top right) */
/* While the Chinese pack is being applied, hide the page instead of flashing English. */
html.lang-loading{visibility:hidden}
.lang-switch{
  display:inline-flex;align-items:center;gap:2px;padding:3px;
  border:1px solid rgba(255,255,255,.28);border-radius:999px;
  background:rgba(255,255,255,.08);
  transition:border-color .35s var(--ease),background .35s var(--ease);
}
.lang-btn{
  appearance:none;-webkit-appearance:none;border:0;background:transparent;cursor:pointer;
  padding:6px 13px;border-radius:999px;
  font-family:inherit;font-size:13px;font-weight:600;line-height:1.2;letter-spacing:.02em;
  color:rgba(255,255,255,.8);transition:color .25s var(--ease),background .25s var(--ease);
}
.lang-btn:hover{color:#fff}
.lang-btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.lang-btn.is-active{background:var(--brand);color:#fff;box-shadow:0 4px 12px rgba(244,121,32,.32)}
.header.is-scrolled .lang-switch{border-color:var(--line);background:var(--bg-soft)}
.header.is-scrolled .lang-btn{color:var(--grey-600)}
.header.is-scrolled .lang-btn:hover{color:var(--ink)}
.header.is-scrolled .lang-btn.is-active{color:#fff}
/* variant used inside the dark mobile drawer */
.lang-switch.wide{width:100%;margin-top:26px;border-color:rgba(255,255,255,.22);background:rgba(255,255,255,.05)}
.lang-switch.wide .lang-btn{flex:1 1 0;padding:11px 0;font-size:15px}

.burger{
  display:none;width:42px;height:42px;border:0;background:transparent;cursor:pointer;
  padding:0;align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.burger span{display:block;width:22px;height:2px;background:#fff;border-radius:2px;transition:.3s var(--ease)}
.header.is-scrolled .burger span{background:var(--ink)}
.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* Mobile drawer */
.drawer{
  position:fixed;inset:0;z-index:99;background:rgba(23,23,25,.97);
  backdrop-filter:blur(10px);
  display:flex;flex-direction:column;justify-content:center;
  padding:96px var(--gutter) 48px;
  opacity:0;visibility:hidden;transition:opacity .32s var(--ease),visibility .32s;
}
.drawer.open{opacity:1;visibility:visible}
.drawer a{
  display:block;padding:16px 0;font-size:20px;font-weight:600;color:#fff;
  border-bottom:1px solid rgba(255,255,255,.1);
}
.drawer a:hover{color:var(--brand)}
.drawer .btn{margin-top:32px;align-self:flex-start}

/* ============================================================
   HERO
   ============================================================ */
.hero{
  position:relative;min-height:100svh;display:flex;align-items:center;
  padding:calc(var(--header-h) + 40px) 0 60px;
  background:
    radial-gradient(120% 90% at 88% 12%, rgba(244,121,32,.20) 0%, rgba(244,121,32,0) 55%),
    radial-gradient(90% 80% at 8% 92%, rgba(244,121,32,.10) 0%, rgba(244,121,32,0) 60%),
    linear-gradient(165deg,#2A2A2D 0%,#1E1E20 46%,#141416 100%);
  color:#fff;overflow:hidden;
}
/* Rotating laboratory backdrop — crossfade every 3 s (see main.js) */
.hero-slides{position:absolute;inset:0;z-index:0;background:#141416}
.hero-slides .slide{
  position:absolute;inset:0;
  background-size:cover;background-position:center;
  opacity:0;transform:scale(1.07);
  transition:opacity 1.5s ease,transform 7.5s linear;
  will-change:opacity,transform;
}
.hero-slides .slide.is-active{opacity:1;transform:scale(1)}
/* readability veil between the photos and the copy */
.hero::after{
  content:"";position:absolute;inset:0;z-index:1;
  background:
    radial-gradient(120% 90% at 88% 12%, rgba(244,121,32,.16) 0%, rgba(244,121,32,0) 55%),
    linear-gradient(180deg, rgba(20,20,22,.80) 0%, rgba(20,20,22,.64) 46%, rgba(20,20,22,.84) 100%);
}
.hero-grid{
  position:relative;z-index:2;display:grid;grid-template-columns:1.08fr .92fr;
  gap:clamp(28px,5vw,64px);align-items:center;width:100%;
}
.hero-logo{height:clamp(56px,7vw,76px);width:auto;margin-bottom:26px}
.hero-tag{
  display:inline-flex;align-items:center;gap:10px;
  font-size:11.5px;font-weight:700;letter-spacing:.2em;text-transform:uppercase;
  color:var(--brand);margin-bottom:20px;
}
.hero-tag::before{content:"";width:30px;height:2px;background:var(--brand)}
.hero h1{font-size:clamp(34px,5.2vw,60px);letter-spacing:-.03em;line-height:1.1}
.hero h1 .hl{color:var(--brand)}
.hero .lead{
  margin-top:22px;max-width:600px;font-size:clamp(15.5px,1.5vw,18px);
  color:rgba(255,255,255,.78);line-height:1.75;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-badge{
  margin-top:36px;display:flex;flex-wrap:wrap;gap:10px 26px;
  font-size:13px;color:rgba(255,255,255,.6);letter-spacing:.02em;
}
.hero-badge span{display:inline-flex;align-items:center;gap:8px}
.hero-badge span::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--brand)}

/* Hero scientific artwork */
.hero-art{position:relative;display:flex;justify-content:center;align-items:center}
.hero-art svg{width:100%;height:auto;max-width:520px;overflow:visible}
.hero-art .float{animation:floatY 8s ease-in-out infinite}
@keyframes floatY{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}

/* decorative grid + glow */
.hero::before{
  content:"";position:absolute;inset:0;z-index:1;
  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:64px 64px;
  mask-image:radial-gradient(70% 70% at 50% 40%,#000 40%,transparent 100%);
  -webkit-mask-image:radial-gradient(70% 70% at 50% 40%,#000 40%,transparent 100%);
}
.hero-dots{
  position:absolute;left:0;bottom:0;width:100%;height:180px;z-index:1;opacity:.5;
}

/* ---------- Stats strip ---------- */
.stats{
  position:relative;z-index:3;margin-top:clamp(48px,6vw,80px);
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.14);
  border-radius:var(--radius);overflow:hidden;backdrop-filter:blur(6px);
}
.stat{background:rgba(30,30,32,.72);padding:26px 22px;transition:background .3s}
.stat:hover{background:rgba(244,121,32,.16)}
.stat b{display:block;font-size:clamp(26px,3vw,34px);font-weight:800;color:#fff;letter-spacing:-.02em}
.stat b em{font-style:normal;color:var(--brand)}
.stat span{display:block;margin-top:8px;font-size:12.5px;color:rgba(255,255,255,.62);line-height:1.5}

/* ============================================================
   ABOUT
   ============================================================ */
.about{background:var(--bg)}
.about-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(32px,5vw,72px);align-items:start}
.about-body p+p{margin-top:18px}
.about-body p{color:var(--grey-600)}
.about-body strong{color:var(--ink);font-weight:600}

.mission{
  margin-top:28px;padding:26px 28px;border-radius:var(--radius);
  background:var(--brand-soft);border-left:4px solid var(--brand);
}
.mission h4{font-size:13px;letter-spacing:.16em;text-transform:uppercase;color:var(--brand-deep);margin-bottom:10px}
.mission p{color:#5C3A22;font-size:15.5px}

.values{display:grid;gap:14px;margin-top:26px}
.value{
  display:flex;gap:16px;align-items:flex-start;padding:20px 22px;
  border:1px solid var(--line);border-radius:var(--radius);background:#fff;
  transition:border-color .3s,transform .3s var(--ease),box-shadow .3s;
}
.value:hover{border-color:var(--brand);transform:translateY(-3px);box-shadow:var(--shadow-sm)}
.value .ic{
  flex:0 0 44px;height:44px;border-radius:12px;background:var(--brand-tint);
  display:grid;place-items:center;color:var(--brand);
}
.value .ic svg{width:22px;height:22px}
.value h4{font-size:16px;margin-bottom:4px}
.value p{font-size:14px;color:var(--grey-600);line-height:1.6}

/* Side card: centres + heritage */
.about-side{display:grid;gap:18px}
.card{
  border:1px solid var(--line);border-radius:var(--radius-lg);background:#fff;
  padding:28px;box-shadow:var(--shadow-sm);
}
.card h4{font-size:12.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--grey);margin-bottom:14px}
.center-item{display:flex;gap:14px;align-items:flex-start;padding:14px 0;border-top:1px dashed var(--line)}
.center-item:first-of-type{border-top:0;padding-top:0}
.center-item .pin{flex:0 0 34px;height:34px;border-radius:10px;background:var(--brand-tint);display:grid;place-items:center;color:var(--brand)}
.center-item .pin svg{width:17px;height:17px}
.center-item h5{margin:0 0 3px;font-size:15px;font-weight:700}
.center-item p{font-size:13.5px;color:var(--grey-600);line-height:1.55}

.heritage{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.heritage div{padding:20px;border-radius:var(--radius);background:var(--bg-soft);text-align:center}
.heritage b{display:block;font-size:32px;font-weight:800;color:var(--brand);letter-spacing:-.02em}
.heritage span{font-size:12.5px;color:var(--grey-600);display:block;margin-top:6px;line-height:1.5}

/* ============================================================
   PLATFORM (table + bars)
   ============================================================ */
.platform{background:var(--bg-soft)}
.table-wrap{
  border:1px solid var(--line);border-radius:var(--radius-lg);background:#fff;
  overflow:hidden;box-shadow:var(--shadow-sm);
}
.tbl-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
table{width:100%;border-collapse:collapse;min-width:760px}
thead th{
  background:var(--ink);color:#fff;text-align:left;font-size:12.5px;font-weight:600;
  letter-spacing:.06em;text-transform:uppercase;padding:15px 18px;white-space:nowrap;
}
tbody td{padding:16px 18px;border-top:1px solid var(--line-soft);font-size:14px;color:var(--grey-600);vertical-align:top;line-height:1.6}
tbody tr:hover{background:var(--bg-warm)}
tbody td:first-child{font-weight:700;color:var(--ink);white-space:nowrap}
tbody tr.hkig-row{background:var(--brand-soft)}
tbody tr.hkig-row td{color:#5C3A22}
tbody tr.hkig-row td:first-child{color:var(--brand-deep)}
.tag{
  display:inline-block;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600;
  background:var(--brand-tint);color:var(--brand-deep);
}
.tag.n{background:#EFEFEF;color:var(--grey-600)}

.platform-callout{
  margin-top:26px;display:grid;grid-template-columns:1.2fr .8fr;gap:20px;
}
.callout{
  padding:30px;border-radius:var(--radius-lg);
  background:linear-gradient(140deg,#2A2A2D 0%,#1B1B1D 100%);color:#fff;
}
.callout h3{font-size:20px;margin-bottom:14px}
.callout h3 em{font-style:normal;color:var(--brand)}
.callout p{color:rgba(255,255,255,.74);font-size:15px}
.callout ul{margin-top:18px;display:grid;gap:10px}
.callout li{display:flex;gap:10px;font-size:14.5px;color:rgba(255,255,255,.82)}
.callout li::before{content:"";flex:0 0 6px;width:6px;height:6px;margin-top:9px;border-radius:50%;background:var(--brand)}
.preciscreen{
  padding:30px;border-radius:var(--radius-lg);border:1px solid var(--brand);
  background:#fff;display:flex;flex-direction:column;justify-content:center;
}
.preciscreen .badge{
  align-self:flex-start;padding:5px 12px;border-radius:999px;background:var(--brand);
  color:#fff;font-size:11.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;margin-bottom:14px;
}
.preciscreen h3{font-size:19px;color:var(--ink);margin-bottom:10px}
.preciscreen p{font-size:14.5px;color:var(--grey-600)}

/* comparative throughput bars */
.bars{margin-top:32px}
.bars h4{font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--grey);margin-bottom:18px}
.bar-row{display:grid;grid-template-columns:170px 1fr 88px;gap:16px;align-items:center;margin-bottom:14px}
.bar-row .lbl{font-size:13.5px;font-weight:600;color:var(--ink)}
.bar-track{height:10px;border-radius:999px;background:#EAE8E7;overflow:hidden}
.bar-fill{display:block;height:100%;width:0;border-radius:999px;background:linear-gradient(90deg,#F0BE93 0%,#E8A96F 100%);transition:width 1.4s var(--ease)}
.bar-fill.alt{background:linear-gradient(90deg,var(--brand-deep) 0%,var(--brand) 100%)}
.bar-row .val{font-size:12.5px;color:var(--grey-600);text-align:right}
.bars .note{margin-top:18px;max-width:920px;font-size:11.5px;line-height:1.75;color:var(--grey-600)}

/* ============================================================
   SERVICES
   ============================================================ */
.services{background:#fff}
.svc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.svc{
  border:1px solid var(--line);border-radius:var(--radius-lg);background:#fff;
  padding:32px;transition:border-color .3s var(--ease),box-shadow .35s var(--ease),transform .35s var(--ease);
  position:relative;overflow:hidden;
}
.svc::after{
  content:"";position:absolute;inset:auto 0 0 0;height:3px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform .4s var(--ease);
}
.svc:hover{border-color:rgba(244,121,32,.5);box-shadow:var(--shadow);transform:translateY(-4px)}
.svc:hover::after{transform:scaleX(1)}
.svc-top{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:14px}
.svc .num{font-size:13px;font-weight:800;color:var(--brand);letter-spacing:.1em}
.svc h3{font-size:clamp(19px,2vw,23px);color:var(--ink);margin-bottom:12px}
.svc > p{font-size:14.5px;color:var(--grey-600);line-height:1.7}
.chip{
  flex:0 0 auto;padding:6px 13px;border-radius:999px;background:var(--brand-tint);
  color:var(--brand-deep);font-size:12px;font-weight:700;white-space:nowrap;
}
.svc-list{margin-top:20px;display:grid;gap:10px}
.svc-list li{display:flex;gap:11px;font-size:14px;color:var(--grey-600);line-height:1.6}
.svc-list li svg{flex:0 0 16px;width:16px;height:16px;margin-top:3px;color:var(--brand)}
.svc-list li b{color:var(--ink);font-weight:600}

.sub-grid{margin-top:18px;display:grid;grid-template-columns:1fr 1fr;gap:12px}
.sub-grid .sub{
  padding:16px;border-radius:var(--radius);background:var(--bg-soft);
  border:1px solid transparent;transition:border-color .3s,background .3s;
}
.sub-grid .sub:hover{border-color:var(--brand);background:var(--brand-soft)}
.sub-grid .sub h5{margin:0 0 5px;font-size:14.5px;font-weight:700;display:flex;align-items:center;justify-content:space-between;gap:8px}
.sub-grid .sub h5 em{font-style:normal;font-size:11.5px;font-weight:700;color:var(--brand-deep);background:var(--brand-tint);padding:3px 9px;border-radius:999px}
.sub-grid .sub p{font-size:13px;color:var(--grey-600);line-height:1.55}

/* Delivery tiers */
.tiers{margin-top:44px;display:grid;grid-template-columns:1fr 1fr;gap:22px}
.tier-card{border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;background:#fff;box-shadow:var(--shadow-sm)}
.tier-card > h4{
  padding:18px 22px;background:var(--ink);color:#fff;font-size:14px;letter-spacing:.04em;
}
.tier-card > h4 em{font-style:normal;color:var(--brand);font-weight:700}
.tier-table{width:100%;border-collapse:collapse;min-width:0}
.tier-table th{font-size:11.5px;text-transform:uppercase;letter-spacing:.08em;color:var(--grey);padding:12px 16px;text-align:left;background:var(--bg-soft);border-bottom:1px solid var(--line)}
.tier-table td{padding:12px 16px;font-size:13.5px;color:var(--grey-600);border-top:1px solid var(--line-soft)}
.tier-table td:first-child{font-weight:700;color:var(--brand-deep);white-space:nowrap}
.tier-card .note{padding:14px 20px;font-size:13px;color:var(--grey-600);background:var(--bg-warm);border-top:1px solid var(--line-soft)}

/* ============================================================
   WORKFLOW
   ============================================================ */
.workflow{background:var(--bg-soft)}
.flow-block{margin-bottom:56px}
.flow-block:last-child{margin-bottom:0}
.flow-title{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-bottom:26px}
.flow-title h3{font-size:19px}
.flow-title .chip{background:#EFEFEF;color:var(--grey-600)}
.flow{display:grid;grid-template-columns:repeat(7,1fr);gap:0;position:relative}
.flow.four{grid-template-columns:repeat(4,1fr)}
.step{position:relative;padding:0 12px;text-align:center}
.step .dot{
  width:52px;height:52px;margin:0 auto;border-radius:50%;
  background:#fff;border:2px solid var(--line);display:grid;place-items:center;
  font-weight:800;font-size:15px;color:var(--grey-400);position:relative;z-index:2;
  transition:all .35s var(--ease);
}
.step.on .dot{border-color:var(--brand);background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(244,121,32,.3)}
.step h5{margin:14px 0 6px;font-size:14px;font-weight:700;line-height:1.4}
.step p{font-size:12.5px;color:var(--grey-600);line-height:1.5}
.step .conn{
  position:absolute;top:26px;left:50%;width:100%;height:2px;background:var(--line);z-index:1;
}
.step:last-child .conn{display:none}
.step.on .conn{background:linear-gradient(90deg,var(--brand),rgba(244,121,32,.25))}
.flow-note{
  margin-top:26px;padding:20px 24px;border-radius:var(--radius);background:#fff;
  border:1px dashed var(--brand);font-size:14px;color:var(--grey-600);
}
.flow-note b{color:var(--brand-deep)}

/* ============================================================
   QUALITY / ADVANTAGES
   ============================================================ */
.quality{background:#fff}
.q-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,48px);align-items:start}
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:46px}
.adv{
  padding:26px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;
  transition:all .35s var(--ease);
}
.adv:hover{border-color:var(--brand);box-shadow:var(--shadow);transform:translateY(-4px)}
.adv .ic{
  width:46px;height:46px;border-radius:13px;background:var(--brand-tint);color:var(--brand);
  display:grid;place-items:center;margin-bottom:16px;
}
.adv .ic svg{width:23px;height:23px}
.adv h4{font-size:16px;margin-bottom:8px}
.adv p{font-size:13.8px;color:var(--grey-600);line-height:1.65}

.deliver{
  margin-top:34px;padding:28px;border-radius:var(--radius-lg);
  background:linear-gradient(140deg,#2A2A2D,#1B1B1D);color:#fff;
}
.deliver h4{font-size:13px;letter-spacing:.16em;text-transform:uppercase;color:var(--brand);margin-bottom:16px}
.deliver ul{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.deliver li{display:flex;gap:10px;font-size:14px;color:rgba(255,255,255,.8)}
.deliver li::before{content:"";flex:0 0 6px;width:6px;height:6px;margin-top:9px;border-radius:50%;background:var(--brand)}

/* ============================================================
   APPLICATIONS
   ============================================================ */
.apps{background:var(--bg-soft)}
.app-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.app{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px;
  transition:all .35s var(--ease);
}
.app:hover{border-color:rgba(244,121,32,.55);box-shadow:var(--shadow);transform:translateY(-4px)}
.app .ic{width:44px;height:44px;border-radius:12px;background:var(--brand-tint);color:var(--brand);display:grid;place-items:center;margin-bottom:16px}
.app .ic svg{width:22px;height:22px}
.app h4{font-size:16.5px;margin-bottom:8px}
.app p{font-size:13.8px;color:var(--grey-600);line-height:1.65}

.market{
  margin-top:44px;padding:34px;border-radius:var(--radius-lg);
  background:linear-gradient(140deg,#2A2A2D,#1B1B1D);color:#fff;
}
.market h4{font-size:18px;margin-bottom:6px}
.market .sub{font-size:13.5px;color:rgba(255,255,255,.75);margin-bottom:26px}
.market-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.m-item{text-align:center}
.m-item .bar{height:120px;display:flex;align-items:flex-end;justify-content:center;margin-bottom:12px}
.m-item .bar i{
  display:block;width:100%;max-width:56px;border-radius:8px 8px 3px 3px;
  background:linear-gradient(180deg,var(--brand) 0%,rgba(244,121,32,.25) 100%);
  height:0;transition:height 1.3s var(--ease);
}
.m-item b{display:block;font-size:22px;font-weight:800;color:#fff}
.m-item span{display:block;font-size:12.5px;color:rgba(255,255,255,.72);margin-top:4px}
.market .src{margin-top:22px;font-size:11.5px;color:rgba(255,255,255,.55)}

/* ============================================================
   CONTACT
   ============================================================ */
.contact{background:#fff}
.c-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:clamp(28px,4.5vw,60px);align-items:start}
.c-info{display:grid;gap:14px}
.c-item{
  display:flex;gap:16px;align-items:flex-start;padding:20px;border:1px solid var(--line);
  border-radius:var(--radius);background:#fff;transition:border-color .3s}
.c-item:hover{border-color:var(--brand)}
.c-item .ic{flex:0 0 42px;height:42px;border-radius:12px;background:var(--brand-tint);color:var(--brand);display:grid;place-items:center}
.c-item .ic svg{width:19px;height:19px}
.c-item .k{font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--grey);font-weight:700}
.c-item .v{margin-top:3px;font-size:15px;font-weight:600;color:var(--ink);word-break:break-word}
.c-item .m{font-size:12.5px;color:var(--grey-600);margin-top:3px}
.wechat{margin-top:6px;padding:22px;border:1px dashed var(--brand);border-radius:var(--radius);background:var(--brand-soft);display:flex;gap:18px;align-items:center}
.wechat img{width:104px;height:104px;border-radius:10px;background:#fff;padding:5px;flex:0 0 auto}
.wechat .k{font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--brand-deep);font-weight:700}
.wechat h5{margin:5px 0 4px;font-size:15.5px}
.wechat p{font-size:13px;color:#5C3A22;line-height:1.55}

/* form */
.form-card{
  border:1px solid var(--line);border-radius:var(--radius-lg);padding:clamp(24px,3vw,38px);
  background:#fff;box-shadow:var(--shadow);
}
.form-card h3{font-size:20px;margin-bottom:6px}
.form-card .hint{margin-bottom:24px;font-size:14px;color:var(--grey-600)}
.f-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}
.f-row.one{grid-template-columns:1fr}
.field label{display:block;font-size:12.5px;font-weight:600;color:var(--ink-soft);margin-bottom:7px}
.field label .req{color:var(--brand)}
.field input,.field select,.field textarea{
  width:100%;padding:13px 15px;border:1px solid var(--line);border-radius:10px;background:#fff;
  color:var(--ink);font-size:14.5px;transition:border-color .25s,box-shadow .25s;outline:none;
}
.field textarea{min-height:126px;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:#B4B0B2}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-tint);
}
.field .err{display:none;margin-top:6px;font-size:12.5px;color:#C0392B}
.field.invalid input,.field.invalid select,.field.invalid textarea{border-color:#C0392B}
.field.invalid .err{display:block}
.consent{display:flex;gap:11px;align-items:flex-start;margin:20px 0 22px;font-size:13px;color:var(--grey-600)}
.consent input{margin:3px 0 0;accent-color:var(--brand);flex:0 0 auto;width:16px;height:16px}
.form-foot{display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between}
.form-foot .fine{font-size:12px;color:var(--grey-500);max-width:300px;line-height:1.5}
.form-msg{
  display:none;margin-top:18px;padding:14px 18px;border-radius:10px;font-size:14px;line-height:1.55;
}
.form-msg.ok{display:block;background:#EAF7EE;border:1px solid #B7E2C4;color:#256B39}
.form-msg.err{display:block;background:#FDECEA;border:1px solid #F3C3BC;color:#A32A1C}
.btn[disabled]{opacity:.6;cursor:not-allowed;transform:none}

/* ============================================================
   FOOTER
   ============================================================ */
.footer{
  background:linear-gradient(170deg,#222224 0%,#171719 100%);color:#fff;
  padding:clamp(52px,6vw,80px) 0 32px;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:clamp(24px,4vw,48px)}
.footer img.f-logo{height:52px;width:auto;margin-bottom:20px}
.footer p.f-desc{font-size:14px;color:rgba(255,255,255,.62);line-height:1.75;max-width:340px}
.footer h5{font-size:12.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--brand);margin-bottom:18px}
.footer ul{display:grid;gap:11px}
.footer ul a{font-size:14px;color:rgba(255,255,255,.72);transition:color .25s}
.footer ul a:hover{color:var(--brand)}
.footer .f-contact li{font-size:13.8px;color:rgba(255,255,255,.68);line-height:1.6}
.footer .f-contact li strong{color:#fff;font-weight:600}
.footer-bottom{
  margin-top:44px;padding-top:24px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center;
  font-size:12.5px;color:rgba(255,255,255,.5);
}
.footer-bottom .legal{font-size:12px;color:rgba(255,255,255,.42);max-width:640px;line-height:1.6}

/* ---------- to top ---------- */
.totop{
  position:fixed;right:22px;bottom:22px;z-index:80;width:46px;height:46px;border-radius:50%;
  background:var(--brand);color:#fff;border:0;display:grid;place-items:center;cursor:pointer;
  box-shadow:0 10px 26px rgba(244,121,32,.35);
  opacity:0;visibility:hidden;transform:translateY(12px);transition:all .3s var(--ease);
}
.totop.show{opacity:1;visibility:visible;transform:translateY(0)}
.totop:hover{background:var(--brand-hover)}

/* ---------- reveal ---------- */
[data-reveal]{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
[data-reveal].in{opacity:1;transform:none}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-art{order:-1;max-width:400px;margin-inline:auto}
  .about-grid,.q-grid,.c-grid{grid-template-columns:1fr}
  .platform-callout{grid-template-columns:1fr}
  .adv-grid,.app-grid{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:repeat(4,1fr);row-gap:30px}
  .flow.four{grid-template-columns:repeat(2,1fr)}
  .step .conn{display:none}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:860px){
  .nav{display:none}
  .header-cta{display:flex;gap:10px}
  .header-cta .btn{display:none}
  .burger{display:flex}
  .stats{grid-template-columns:1fr 1fr}
  .svc-grid,.tiers{grid-template-columns:1fr}
  .market-grid{grid-template-columns:1fr 1fr}
  .m-item .bar{height:100px}
}
@media (max-width:600px){
  :root{--header-h:66px}
  .hero{min-height:auto;padding-top:calc(var(--header-h) + 28px);padding-bottom:44px}
  .hero-actions .btn{flex:1 1 100%}
  .adv-grid,.app-grid,.sub-grid,.deliver ul,.f-row{grid-template-columns:1fr}
  .flow,.flow.four{grid-template-columns:1fr 1fr}
  .market-grid{grid-template-columns:1fr 1fr}
  .wechat{flex-direction:column;text-align:center}
  .lang-btn{padding:5px 10px;font-size:12px}
  .footer-grid{grid-template-columns:1fr}
  .bar-row{grid-template-columns:120px 1fr;row-gap:4px}
  .bar-row .val{grid-column:2;text-align:left}
}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important}
  html{scroll-behavior:auto}
}


/* ============================================================
   MULTI-PAGE UPGRADE — 2026-09-25
   仅增量追加，复用现有 CSS 变量与排版尺度，不覆盖既有规则。
   ============================================================ */

/* ---------- 0. 深灰主色覆盖（边博士 2026-09-25 选定 A 暖灰） ----------
   把原近黑面（#2A2A2D / #1E1E20 / #141416 / #222224 / #171719）统一换成
   与 Logo 灰 #80787B 同色相（hsl 337°）的暖灰阶：
     --dark   #3E3A3C   渐变起 / Hero 顶
     --dark-2 #332F31   渐变中
     --dark-3 #282526   渐变底 / 页脚 / 抽屉
     --dark-line #524D4F 深底上的描边、分隔
   白字对比度 ≥ 9:1，可读性不变。只覆盖 background，不动原 style.css 其它声明。
   ==================================================================== */
:root{
  --dark:#3E3A3C;
  --dark-2:#332F31;
  --dark-3:#282526;
  --dark-line:#524D4F;
}
.hero{
  background:
    radial-gradient(120% 90% at 88% 12%, rgba(244,121,32,.20) 0%, rgba(244,121,32,0) 55%),
    radial-gradient(90% 80% at 8% 92%, rgba(244,121,32,.10) 0%, rgba(244,121,32,0) 60%),
    linear-gradient(165deg,#3E3A3C 0%,#332F31 46%,#282526 100%);
}
.hero-slides{background:#282526}
.hero::after{
  background:
    radial-gradient(120% 90% at 88% 12%, rgba(244,121,32,.16) 0%, rgba(244,121,32,0) 55%),
    linear-gradient(180deg, rgba(40,37,38,.78) 0%, rgba(40,37,38,.62) 46%, rgba(40,37,38,.82) 100%);
}
.stat{background:rgba(51,47,49,.74)}
.callout,.deliver,.market{background:linear-gradient(140deg,#3E3A3C 0%,#2B282A 100%)}
.footer{background:linear-gradient(170deg,#332F31 0%,#282526 100%)}
.drawer{background:rgba(40,37,38,.97)}

/* ---------- 0b. 层级字号微调 ----------
   Hero 顶部标签原 11.5px，比区块 eyebrow（12px）还小，层级倒挂。
   提为 13px 后形成递减阶梯：hero-tag 13 > .eyebrow 12 > .eyebrow-sm 11.5。
   字距由 .2em 收到 .18em（绝对间距不变，观感不散），引导横线同步加长到 34px。
   文案 2026-09-25 由「抗体工程 CRO · 中国」改为「专业抗体工程解决方案」，
   英文随之变长（42 字符大写），故窄屏降一档并允许折行。
   ==================================================================== */
.hero-tag{font-size:13px;letter-spacing:.18em;margin-bottom:22px}
.hero-tag::before{width:34px}
@media (max-width:600px){
  .hero-tag{font-size:12px;letter-spacing:.12em;line-height:1.6;align-items:flex-start}
  .hero-tag::before{width:26px;margin-top:.7em}
}

/* ---------- 0c. 排版层级统一（2026-09-25） ----------
   问题：字号档位过密且存在倒挂——正文 11 档（16/15.5/15/14.5/14/13.8/13.5/13/12.5/12/11.5），
   h4 跨 12.5–18、h5 跨 12.5–15.5（h5 15.5 比 h4 13 还大），
   .card h4（12.5，卡片主标题）反而小于同级 .pin h5（15，卡片内条目标题）。
   统一为下列阶梯（与 0b 的标签改动同源）：

     H1  clamp(34px,5.2vw,60px)    Hero 大标题
     H2  clamp(28px,3.6vw,42px)    区块主标题
     H3  clamp(19px,2vw,22px)      区块内大标题 / 服务卡标题
     H4+ 17px                      子块标题（市场格局）
     H4  16px                      卡片主标题
     H5  15px                      卡片内条目标题
     标签 13px(.hero-tag) > 12px(.eyebrow / 卡片标签) > 11.5px(最小标签)
     正文 15.5 / 14.5 / 13.5 / 12.5 / 12
   ==================================================================== */

/* H3 档：原本散在 18 / 19 / 20 / 19–23 四档，统一为同一 clamp */
.svc h3,
.callout h3,.form-card h3,.preciscreen h3,.flow-title h3{font-size:clamp(19px,2vw,22px)}
.cat-head h3{font-size:19px}

/* H4+ / H4 / H5 档 */
.market h4{font-size:17px}
.app h4,.pcard h4,.news-card h3{font-size:16px}
.card h4{font-size:16px;letter-spacing:.08em}   /* 12.5 → 16，修正"标题小于同级条目"的倒挂 */
.tier-card > h4{font-size:15px}
.wechat h5,.sub-grid .sub h5,.step h5{font-size:15px}

/* 标签 overline 档：13 > 12 > 11.5 */
.mission h4,.deliver h4,.bars h4,.footer h5{font-size:12px}

/* 正文档：15.5 / 14.5 / 13.5 / 12.5 / 12 */
.callout p{font-size:15.5px}
.svc-list li,.value p,.deliver li,.form-card .hint,.news-card p{font-size:14.5px}
.sub-grid .sub p,.step p,.flow-note,.wechat p,.app p,.adv p,
.tier-card .note,.footer .f-contact li{font-size:13.5px}
.bars .note,.market .src,.tag,.chip{font-size:12.5px}
.tier-table th{font-size:12px}

/* ---------- 1. Desktop dropdown navigation ---------- */
.nav-group{position:relative}
.nav-toggle{
  position:relative;display:inline-flex;align-items:center;gap:7px;
  padding:9px 13px;font:inherit;font-size:14.5px;font-weight:500;
  color:rgba(255,255,255,.86);background:transparent;border:0;border-radius:8px;
  cursor:pointer;transition:color .25s,background .25s;
}
.nav-toggle::after{
  content:"";width:7px;height:7px;margin-top:-3px;
  border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;
  transform:rotate(45deg);opacity:.7;transition:transform .28s var(--ease);
}
.nav-group.is-open .nav-toggle::after{transform:rotate(-135deg);margin-top:2px}
.nav a:hover,.nav-toggle:hover{color:#fff;background:rgba(255,255,255,.08)}
.nav a.is-current,.nav-toggle.is-current{color:#fff}
.nav-toggle.is-current::after{border-color:var(--brand)}
.nav a.is-current::after{
  content:"";position:absolute;left:13px;right:13px;bottom:3px;height:2px;
  border-radius:2px;background:var(--brand);
}
/* 滚动后（白底）状态 */
.header.is-scrolled .nav a,
.header.is-scrolled .nav-toggle{color:var(--ink-soft)}
.header.is-scrolled .nav a:hover,
.header.is-scrolled .nav-toggle:hover{color:var(--brand);background:var(--brand-tint)}
.header.is-scrolled .nav a.is-current,
.header.is-scrolled .nav-toggle.is-current{color:var(--brand)}
/* 下拉面板 */
.submenu{
  position:absolute;top:calc(100% + 6px);left:50%;z-index:20;
  min-width:262px;padding:10px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-lg);
  opacity:0;visibility:hidden;transform:translateX(-50%) translateY(-6px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
}
.nav-group:hover .submenu,
.nav-group:focus-within .submenu,
.nav-group.is-open .submenu{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.submenu a{
  display:block;padding:10px 13px;border-radius:9px;
  font-size:14px;font-weight:500;color:var(--ink-soft);line-height:1.45;
  transition:background .2s,color .2s;
}
.submenu a:hover{background:var(--brand-tint);color:var(--brand-deep)}
.submenu a.is-current{background:var(--brand-tint);color:var(--brand-deep);font-weight:600}
@media (max-width:860px){ .nav-group{display:none} }

/* ---------- 2. Mobile drawer sub-groups ---------- */
.drawer-group{border-bottom:1px solid rgba(255,255,255,.1)}
.drawer-toggle{
  display:flex;align-items:center;justify-content:space-between;width:100%;
  padding:16px 0;font:inherit;font-size:20px;font-weight:600;color:#fff;
  background:transparent;border:0;cursor:pointer;text-align:left;
}
.drawer-toggle::after{
  content:"";width:8px;height:8px;margin-right:4px;
  border-right:1.8px solid currentColor;border-bottom:1.8px solid currentColor;
  transform:rotate(45deg);opacity:.75;transition:transform .28s var(--ease);
}
.drawer-group.is-open .drawer-toggle{color:var(--brand)}
.drawer-group.is-open .drawer-toggle::after{transform:rotate(-135deg)}
.drawer-sub{display:none;padding:2px 0 12px}
.drawer-group.is-open .drawer-sub{display:block}
.drawer-sub a{
  display:block;padding:11px 0 11px 18px;font-size:16px;font-weight:500;
  color:rgba(255,255,255,.76);border-bottom:0;
  border-left:2px solid rgba(255,255,255,.14);
}
.drawer-sub a:hover{color:var(--brand);border-left-color:var(--brand)}

/* ---------- 3. Sub-page banner ---------- */
.page-head{
  position:relative;overflow:hidden;
  padding:calc(var(--header-h) + clamp(30px,5vw,58px)) 0 clamp(38px,5vw,60px);
  background:
    radial-gradient(110% 90% at 88% 10%, rgba(244,121,32,.20) 0%, rgba(244,121,32,0) 55%),
    radial-gradient(85% 80% at 6% 92%, rgba(244,121,32,.10) 0%, rgba(244,121,32,0) 60%),
    linear-gradient(165deg,#3E3A3C 0%,#332F31 46%,#282526 100%);
  color:#fff;
}
.page-head .crumbs{
  font-size:12.5px;color:rgba(255,255,255,.55);margin-bottom:14px;
}
.page-head .crumbs a{color:rgba(255,255,255,.72)}
.page-head .crumbs a:hover{color:var(--brand)}
.page-head .crumbs span{margin:0 8px;opacity:.5}
.page-head h1{font-size:clamp(28px,3.9vw,44px);color:#fff;max-width:900px}
.page-head .lead{margin-top:16px;max-width:760px}
.page-head .eyebrow{margin-bottom:12px}

/* ---------- 4. Content blocks ---------- */
.blk{padding:clamp(48px,6vw,84px) 0;border-top:1px solid var(--line-soft)}
.blk:first-of-type{border-top:0}
.blk-head{max-width:820px;margin-bottom:clamp(24px,3.5vw,40px)}
.blk-head h2{font-size:clamp(23px,2.6vw,31px);margin-bottom:12px}
.blk-head p{color:var(--grey-600);font-size:15.5px;line-height:1.8}
.blk h3{font-size:19px;margin-bottom:10px}
.blk p{color:var(--grey-600);line-height:1.8;font-size:15.5px}
.blk ul{list-style:none;padding:0}
.blk ul li{
  position:relative;padding-left:22px;margin-bottom:9px;
  color:var(--grey-600);font-size:15px;line-height:1.75;
}
.blk ul li::before{
  content:"";position:absolute;left:4px;top:9px;width:6px;height:6px;
  border-radius:50%;background:var(--brand);
}
.blk ul li strong,.blk p strong{color:var(--ink)}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.pcard{
  border:1px solid var(--line);border-radius:var(--radius-lg);background:#fff;
  padding:26px;box-shadow:var(--shadow-sm);
  transition:border-color .3s var(--ease),box-shadow .35s var(--ease),transform .35s var(--ease);
}
.pcard:hover{border-color:var(--brand);box-shadow:var(--shadow);transform:translateY(-3px)}
.pcard h4{font-size:17px;margin-bottom:10px}
.pcard p{color:var(--grey-600);font-size:14.5px;line-height:1.75}
.pcard .tagline{
  display:inline-block;margin-bottom:12px;padding:5px 12px;border-radius:999px;
  background:var(--brand-tint);color:var(--brand-deep);
  font-size:11.5px;font-weight:700;letter-spacing:.06em;
}
.sec-alt{background:var(--bg-soft)}
.eyebrow-sm{
  display:inline-block;font-size:11.5px;font-weight:700;letter-spacing:.16em;
  text-transform:uppercase;color:var(--brand);margin-bottom:12px;
}

/* ---------- 5. Product catalogue ---------- */
/* 表格单元格内的紧凑列表 */
ul.tight{list-style:none;margin:0;padding:0}
ul.tight li{
  position:relative;padding-left:15px;margin-bottom:5px;
  font-size:13px;line-height:1.6;color:var(--grey-600);
}
ul.tight li::before{
  content:"";position:absolute;left:1px;top:8px;width:5px;height:5px;
  border-radius:50%;background:var(--brand);
}
ul.tight li:last-child{margin-bottom:0}
.cat-head{
  display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;
  margin:clamp(28px,3.5vw,42px) 0 14px;
}
.cat-head:first-child{margin-top:0}
.cat-head h3{font-size:18px;margin:0}
.cat-head .cn{font-size:14px;color:var(--grey-500)}
/* 英文页不显示中文小标：词条为空时整块收掉，避免留下空行 */
.cat-head .cn:empty{display:none}
.catalogue table{min-width:520px}
.catalogue td:last-child{white-space:nowrap;font-variant-numeric:tabular-nums;color:var(--brand-deep);font-weight:600}
.catalogue .code{color:var(--brand-deep);font-weight:600}
.catalogue tbody tr:nth-child(even){background:var(--bg-warm)}

/* ---------- 6. News list ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{
  display:flex;flex-direction:column;overflow:hidden;
  border:1px solid var(--line);border-radius:var(--radius-lg);background:#fff;
  box-shadow:var(--shadow-sm);
  transition:border-color .3s var(--ease),box-shadow .35s var(--ease),transform .35s var(--ease);
}
.news-card:hover{border-color:var(--brand);box-shadow:var(--shadow);transform:translateY(-4px)}
.news-card .thumb{
  position:relative;padding-top:56%;background:var(--bg-soft) center/cover no-repeat;
}
.news-card .thumb img{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
}
.news-card .body{padding:22px 24px 26px;display:flex;flex-direction:column;flex:1}
.news-card .date{
  font-size:12px;font-weight:700;letter-spacing:.08em;color:var(--brand);margin-bottom:10px;
}
.news-card h3{font-size:16.5px;line-height:1.5;margin-bottom:10px;color:var(--ink)}
.news-card:hover h3{color:var(--brand-deep)}
.news-card p{font-size:14px;line-height:1.7;color:var(--grey-600);flex:1}
.news-card .more{
  margin-top:16px;font-size:13.5px;font-weight:600;color:var(--brand-deep);
  display:inline-flex;align-items:center;gap:6px;
}
.news-card .more .arw{transition:transform .28s var(--ease)}
.news-card:hover .more .arw{transform:translateX(4px)}

/* ---------- 7. CTA band ---------- */
.cta-band{
  padding:clamp(46px,6vw,78px) 0;
  background:linear-gradient(140deg,#3E3A3C,#2B282A);color:#fff;
}
.cta-band h2{font-size:clamp(24px,2.8vw,34px);color:#fff;max-width:760px}
.cta-band p{margin-top:14px;color:rgba(255,255,255,.7);max-width:640px;line-height:1.8}
.cta-band .btn{margin-top:26px}

/* ---------- 8. Responsive ---------- */
@media (max-width:1024px){
  .grid-3,.news-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:860px){
  .grid-2,.grid-3,.news-grid{grid-template-columns:1fr}
}

/* ---- section L：logo 按语言切换（英文默认 / 中文模式） ---- */
html[lang^="zh"] .logo-en{display:none!important}
html:not([lang^="zh"]) .logo-zh{display:none!important}

/* ---- section M：Hero 并列 Immune Technology 标识 ---- */
.hero-brand-row{display:flex;align-items:center;flex-wrap:wrap;column-gap:32px;margin-bottom:26px}
.hero-brand-row .hero-logo{margin-bottom:0}
@media (max-width:600px){
  .hero-brand-row{column-gap:18px}
}