/* ═══════════════════════════════════════════════════════════════
   Harbin Transformer — homepage
   视觉方向（2026-10-14 用户定）：深海军蓝底 + 亮蓝/白字。
   旧站配色已全部弃用。
   No framework, no build step.
   ═══════════════════════════════════════════════════════════════ */

:root{
  /* 深海军蓝 —— 全站底色 */
  --navy:        #104785;
  --navy-900:    #0a326b;
  --navy-700:    #185aa4;
  --navy-600:    #2470c2;
  /* 亮蓝 —— 界面强调色（按钮底、进度条、装饰线） */
  --primary:     #00b7ff;
  --primary-hov: #39c7ff;
  --accent:      #00b7ff;
  --accent-hov:  #39c7ff;
  /* 亮蓝在浅底上做文字太浅，单独给一个深一档的蓝 */
  --primary-ink: #0072d6;
  /* 品牌红：只出现在 LOGO 里，界面不使用 */
  --logo-red:    #c81018;

  /* neutrals */
  --ink:      #17212b;
  --muted:    #5f6972;
  --bg:       #f7f7f5;
  --bg-light: #f0f2f3;
  --border:   #dfe2e4;

  /* on dark */
  --on-dark:      #ffffff;
  --on-dark-soft: rgba(255,255,255,.80);
  --on-dark-dim:  rgba(255,255,255,.58);
  --sky:          #70d7ff;
  --hair:         rgba(255,255,255,.14);

  --maxw: 1680px;
  --gut:  30px;
  --r:    4px;

  --fs-h1: clamp(1.72rem, 2.85vw, 2.62rem);
  --fs-h2: clamp(1.6rem, 2.55vw, 2.3rem);
  --fs-h3: clamp(1.2rem, 1.7vw, 1.5rem);

  --ease: cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{ box-sizing:border-box }

html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth }
section[id]{ scroll-margin-top:96px }

body{
  margin:0;
  background:var(--navy);
  color:rgba(255,255,255,.86);
  font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  font-size:16px;
  line-height:1.62;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img,picture,svg,video{ display:block; max-width:100% }
img{ height:auto }

a{ color:inherit; text-decoration:none }
button{ font:inherit; color:inherit; background:none; border:0; cursor:pointer }

h1,h2,h3,h4{ margin:0; font-weight:700; letter-spacing:-.02em; line-height:1.16 }
p{ margin:0 }

.wrap{ width:100%; max-width:var(--maxw); margin-inline:auto; padding-inline:var(--gut) }

/* 大屏逐级展开内容区，同时保留足够的页面安全边距。 */
@media (min-width:1280px){
  :root{ --gut:clamp(36px,3vw,60px) }
}

.skip{
  position:absolute; left:-9999px; top:0; z-index:999;
  background:#fff; color:var(--navy); padding:12px 18px; border-radius:0 0 var(--r) 0;
}
.skip:focus{ left:0 }

:focus-visible{ outline:3px solid var(--sky); outline-offset:3px; border-radius:2px }


/* ─────────────────────────────  Buttons  ───────────────────────────── */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:9px;
  padding:14px 26px; border-radius:var(--r); border:1px solid transparent;
  font-size:.94rem; font-weight:600; letter-spacing:.005em; white-space:nowrap;
  transition:background-color .2s var(--ease), border-color .2s var(--ease),
             color .2s var(--ease), transform .2s var(--ease), box-shadow .2s var(--ease);
}
.btn:hover{ transform:translateY(-1px) }

.btn-accent{ background:var(--accent); color:#05295c; font-weight:750;
             box-shadow:0 8px 28px rgba(0,183,255,.34) }
.btn-accent:hover{ background:#fff; color:var(--navy-900); box-shadow:0 10px 32px rgba(0,183,255,.42) }

.btn-ghost{ border-color:rgba(255,255,255,.80); color:#fff; background:rgba(255,255,255,.16); font-weight:600 }
.btn-ghost:hover{ background:rgba(255,255,255,.20); border-color:#fff }

/* nav 按钮：白描边，把红色留给首屏主 CTA */
.btn-nav{ border-color:var(--primary); color:#05295c; background:var(--primary); font-weight:700;
          box-shadow:0 8px 28px rgba(0,183,255,.26) }
.btn-nav:hover{ background:#fff; border-color:#fff; color:var(--navy) }

.btn-primary{ background:var(--primary); color:var(--navy-900); font-weight:700;
               box-shadow:0 6px 22px rgba(0,183,255,.30) }
.btn-primary:hover{ background:var(--primary-hov) }

.btn-outline{ border-color:var(--primary); color:#fff; background:transparent }
.btn-outline:hover{ border-color:var(--primary-hov); color:#05295c; background:var(--primary-hov) }

.btn-lg{ padding:17px 34px; font-size:1rem }


/* ─────────────────────────────  0. Header  ───────────────────────────── */
.site-header{
  position:fixed; inset:0 0 auto 0; z-index:100;
  transition:background-color .35s var(--ease), box-shadow .35s var(--ease),
             backdrop-filter .35s var(--ease);
}
.site-header::after{
  content:""; position:absolute; inset:0; z-index:-1;
  background:linear-gradient(180deg, rgba(8,43,94,.92) 0%, rgba(8,43,94,.52) 54%, rgba(8,43,94,0) 100%);
  opacity:1; transition:opacity .3s var(--ease);
}
/* 滚动后：完全不透明的深蓝，绝不与浅色内容混色 */
.site-header.is-solid{ background:#0d3d7b; }
.site-header.is-solid::after{ opacity:0 }
.site-header.is-solid{ box-shadow:0 1px 0 var(--hair), 0 14px 34px rgba(0,0,0,.30) }

.header-inner{ display:flex; align-items:center; gap:26px; height:78px }

/* brand */
.brand{ display:flex; align-items:center; gap:12px; flex:0 0 auto }
.brand-mark{ width:38px; height:38px; flex:0 0 auto }
.brand-text{ display:flex; flex-direction:column; line-height:1 }
.brand-logo{
  width:clamp(133px,10.85vw,153px);
  height:auto;
  display:block;
  filter:drop-shadow(0 8px 18px rgba(4,26,62,.34));
}
.brand--footer .brand-logo{ width:182px }
.brand-text i{ font-style:normal; font-size:.62rem; font-weight:600; letter-spacing:.30em; color:var(--on-dark-dim); margin-top:5px }
.brand--footer .brand-text b{ color:#fff }

/* nav */
.primary{ display:flex; align-items:center; gap:26px; margin-left:auto }
.nav-list{ display:flex; align-items:center; gap:4px; list-style:none; margin:0; padding:0 }

.nav-list > li{ position:relative }
.nav-list > li > a{
  display:flex; align-items:center; gap:7px;
  padding:10px 14px; border-radius:var(--r);
  font-size:.93rem; font-weight:500; color:rgba(255,255,255,.88);
  text-shadow:0 1px 10px rgba(6,21,48,.75);
  transition:color .2s var(--ease), background-color .2s var(--ease);
}
.nav-list > li > a:hover,
.nav-list > li.is-open > a{ color:#fff; background:rgba(255,255,255,.09) }
.nav-list > li > a[aria-current]{ color:#fff }

.caret{
  width:6px; height:6px; border-right:1.6px solid currentColor; border-bottom:1.6px solid currentColor;
  transform:rotate(45deg) translateY(-2px); transition:transform .25s var(--ease); opacity:.75;
}
.has-drop:hover .caret, .has-drop.is-open .caret{ transform:rotate(225deg) translateY(-1px) }

.drop{
  position:absolute; top:calc(100% + 10px); left:0; min-width:250px;
  list-style:none; margin:0; padding:8px;
  background:var(--navy-700); border:1px solid var(--hair); border-radius:6px;
  box-shadow:0 24px 54px rgba(0,0,0,.42);
  opacity:0; visibility:hidden; transform:translateY(-6px);
  transition:opacity .22s var(--ease), transform .22s var(--ease), visibility .22s;
}
.has-drop:hover .drop, .has-drop:focus-within .drop, .has-drop.is-open .drop{
  opacity:1; visibility:visible; transform:translateY(0)
}
.drop a{
  display:block; padding:10px 14px; border-radius:var(--r);
  font-size:.9rem; color:var(--on-dark-soft); transition:background-color .16s, color .16s;
}
.drop a:hover{ background:rgba(255,255,255,.10); color:#fff }

.nav-cta{ padding:11px 22px; font-size:.9rem }
.nav-toggle{ display:none }


/* ─────────────────────────────  1. Hero  ───────────────────────────── */
.hero{ position:relative; background:var(--navy); min-height:100svh; overflow:hidden; isolation:isolate }

.hero-slide{
  position:absolute; inset:0;
  opacity:0; visibility:hidden;
  transition:opacity 1.1s var(--ease), visibility 1.1s;
}
.hero-slide.is-active{ opacity:1; visibility:visible; position:relative }
.hero-slide::after{
  content:""; position:absolute; inset:0; z-index:1; pointer-events:none;
  background:rgba(6,38,86,.60);
}

.hero-media{
  position:absolute; inset:0; width:100%; height:100%; object-fit:cover;
  filter:saturate(1.16) contrast(1.045);
}
.hero-video{
  max-width:none;
  filter:saturate(1.22) contrast(1.05);
}
.hero-slide picture{ position:absolute; inset:0 }

.hero-content{
  position:relative; z-index:2;
  display:flex; flex-direction:column; justify-content:center;
  min-height:100svh; max-width:900px;
  padding-top:150px; padding-bottom:170px;
}

.eyebrow{
  display:flex; align-items:center; gap:12px; margin-bottom:22px;
  font-size:.76rem; font-weight:700; letter-spacing:.19em; text-transform:uppercase; color:var(--sky);
  text-shadow:none;
}
.eyebrow::before{ content:""; width:34px; height:2px; background:var(--accent); flex:0 0 auto }

.hero-title{
  font-size:var(--fs-h1); font-weight:700; letter-spacing:-.021em; line-height:1.22;
  color:#fff; margin:0 0 26px; max-width:34ch;
  text-wrap:pretty; text-shadow:none;
}
.hero-slide[data-slide="1"] .hero-title{ max-width:36ch }

.lede{
  font-size:clamp(1rem,1.12vw,1.08rem); line-height:1.66;
  color:rgba(255,255,255,.90); max-width:58ch; margin-bottom:32px;
  text-shadow:none;
}

.hero-actions{ display:flex; flex-wrap:wrap; gap:14px }

/* carousel controls */
.hero-nav{ position:absolute; left:0; right:0; bottom:0; z-index:3; padding-bottom:54px }
.hero-nav-inner{ display:flex; align-items:center; gap:34px }

.hero-tab{
  display:flex; align-items:center; gap:13px; padding:8px 0;
  font-size:.82rem; font-weight:700; letter-spacing:.14em; text-transform:uppercase;
  color:rgba(255,255,255,.82); transition:color .25s var(--ease);
  text-shadow:none;
}
.hero-tab:hover{ color:var(--on-dark-soft) }
.hero-tab.is-active{ color:#fff }
.hero-tab .num{ font-variant-numeric:tabular-nums; opacity:.9 }
.hero-tab .bar{ position:relative; width:64px; height:3px; background:rgba(255,255,255,.34); overflow:hidden; border-radius:2px }
.hero-tab .bar i{ position:absolute; inset:0; background:var(--accent); transform:scaleX(0); transform-origin:left }
.hero-tab.is-active .bar i{ animation:heroFill 10s linear forwards }
.hero-tab.is-paused .bar i{ animation-play-state:paused }
@keyframes heroFill{ from{ transform:scaleX(0) } to{ transform:scaleX(1) } }
@media (max-width:720px){ .hero-tab .lbl{ display:none } .hero-nav{ padding-bottom:32px } }


/* ─────────────────────────────  2. Trust bar  ───────────────────────────── */
.trustbar{ background:var(--navy-900); border-top:1px solid var(--hair); color:#fff }
.trustbar-inner{ display:flex; flex-wrap:wrap; align-items:center; gap:14px 0; padding:24px 0 }
.trust-item{
  display:flex; align-items:center; gap:13px;
  font-size:.92rem; font-weight:500; letter-spacing:.005em; color:var(--on-dark-soft);
}
.trust-item::before{ content:""; width:7px; height:7px; border-radius:50%; background:var(--accent); flex:0 0 auto }
.trust-item + .trust-item{ margin-left:38px }
@media (max-width:900px){
  .trust-item + .trust-item{ margin-left:0; margin-top:12px }
  .trustbar-inner{ flex-direction:column; align-items:flex-start; gap:0 }
}


/* ─────────────────────────────  3–5. Blocks  ───────────────────────────── */
.block{ padding:clamp(72px,8vw,116px) 0 }
.block--white{ background:var(--navy) }
.block--light{ background:var(--navy-900) }

.section-head{ margin-bottom:clamp(36px,4vw,54px); max-width:820px }
.section-head h2{ font-size:var(--fs-h2); color:#fff }
.section-head h2::before{
  content:""; display:block; width:46px; height:3px; background:var(--accent);
  margin-bottom:22px; border-radius:2px;
}

.prose > p + p{ margin-top:20px }
.prose .lead{ font-size:clamp(1.07rem,1.35vw,1.22rem); line-height:1.6; color:#fff }
.prose p{ color:rgba(255,255,255,.76) }
.prose .lead{ color:#fff }
.prose strong{ color:#fff; font-weight:650 }
.prose em{ font-style:normal; font-weight:650; color:var(--sky) }
.prose--wide{ max-width:900px; margin-bottom:clamp(44px,5vw,62px) }

/* 2-col: prose + figure */
.split-2{ display:grid; gap:clamp(36px,4.5vw,64px); align-items:start }
.split-2--media{ grid-template-columns:1.15fr .85fr }

.figure{ margin:0 }
.figure img{ width:100%; border-radius:var(--r); aspect-ratio:14/9; object-fit:cover;
             box-shadow:0 22px 54px rgba(0,0,0,.42) }
.figure figcaption{ margin-top:12px; font-size:.8rem; letter-spacing:.06em; text-transform:uppercase; color:rgba(255,255,255,.50) }

@media (max-width:900px){
  .split-2--media{ grid-template-columns:1fr }
  .split-2--media .figure{ order:-1 }
}

/* inline inquiry embed */
.inline-cta{
  display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap:22px;
  margin-top:clamp(44px,5vw,64px); padding-top:34px; border-top:1px solid rgba(255,255,255,.16);
}
.inline-cta__text{ max-width:52ch; font-size:.98rem; color:rgba(255,255,255,.70) }
.inline-cta__btns{ display:flex; flex-wrap:wrap; gap:12px }


/* ── scenario cards ─────────────────────────────────────────────
   大卡：图片占满卡片上部，文字在下方深色块里。
   高度接近一屏，三张并排。                                    */
.cards{
  display:grid; grid-template-columns:repeat(3,1fr);
  gap:16px;
}
.card{
  position:relative; display:flex; flex-direction:column;
  background:var(--navy-900); overflow:hidden; isolation:isolate;
  border-radius:var(--r); color:#fff; text-decoration:none;
}
.card-media{ position:relative; flex:0 0 auto; aspect-ratio:1/1; overflow:hidden; display:block }
.card-media::after{
  content:""; position:absolute; inset:0;
  background:linear-gradient(0deg, rgba(6,21,48,.72) 0%, rgba(6,21,48,.10) 34%, rgba(6,21,48,0) 62%);
  transition:opacity .4s var(--ease);
}
.card picture{ display:block; width:100%; height:100% }
.card img{
  width:100%; height:100%; object-fit:cover;
  transition:transform .8s var(--ease);
}
.card:hover img{ transform:scale(1.06) }
.card:hover .card-media::after{ opacity:.55 }

.card-body{
  flex:1 1 auto; padding:28px 30px 30px;
  background:var(--navy-900); border-top:1px solid rgba(255,255,255,.09);
  display:block;
}
.card-title{
  display:block; font-size:clamp(1.28rem,1.65vw,1.6rem); font-weight:700;
  letter-spacing:-.015em; line-height:1.2; color:#fff;
}
.card-title .go{
  display:inline-block; font-style:normal; font-weight:400; color:var(--sky);
  transform:translateX(0); transition:transform .3s var(--ease);
}
.card:hover .card-title .go{ transform:translateX(6px) }
.card-desc{
  display:block; margin-top:12px; font-size:.95rem; line-height:1.55;
  color:rgba(255,255,255,.82);
}
/* 亮蓝细线，悬停拉长 */
.card-title::after{
  content:""; display:block; width:34px; height:3px; background:var(--accent);
  margin-top:16px; border-radius:2px; transition:width .4s var(--ease);
}
.card:hover .card-title::after{ width:76px }

@media (max-width:1080px){
  .cards{ grid-template-columns:1fr; }
  .card{ flex-direction:row; }
  .card-media{ flex:1 1 52%; aspect-ratio:4/3 }
  .card-body{ flex:1 1 48%; display:flex; flex-direction:column; justify-content:center;
              border-top:0; border-left:1px solid rgba(255,255,255,.09); padding:30px }
}
@media (max-width:680px){
  .card{ flex-direction:column }
  .card-media{ flex:0 0 auto; aspect-ratio:16/10 }
  .card-body{ border-left:0; border-top:1px solid rgba(255,255,255,.09) }
}


/* manufacturing panels */
.panels{ display:grid; grid-template-columns:1fr 1fr; gap:0; border-radius:var(--r); overflow:hidden }
.panel{ padding:clamp(34px,3.6vw,52px) }
.panel h3{ font-size:var(--fs-h3); margin-bottom:20px }
.panel p{ font-size:.97rem }
.panel p + p{ margin-top:18px }

.panel-tag{
  font-size:.74rem; font-weight:700; letter-spacing:.17em; text-transform:uppercase;
  margin-bottom:16px; display:flex; align-items:center; gap:10px;
}
.panel-tag::before{ content:""; width:22px; height:2px; background:var(--accent) }

.panel--dark{
  background:var(--navy-900);
  color:var(--on-dark-soft);
  border:1px solid rgba(255,255,255,.13);
}
.panel--dark h3{ color:#fff }
.panel--dark strong{ color:#fff }
.panel--dark .panel-tag{ color:#9cc4ff }

.panel--light{ background:var(--navy-700); border:1px solid rgba(255,255,255,.13); border-left:0 }
.panel--light h3{ color:#fff }
.panel--light p{ color:rgba(255,255,255,.76) }
.panel--light .panel-tag{ color:#b4d6ff }

.creds{ list-style:none; margin:22px 0 0; padding:0; display:grid; gap:12px }
.creds li{ position:relative; padding-left:26px; font-size:.95rem; color:rgba(255,255,255,.88) }
.creds li::before{
  content:""; position:absolute; left:0; top:.55em;
  width:11px; height:11px; border-radius:50%;
  border:2px solid var(--accent);
}

@media (max-width:900px){
  .panels{ grid-template-columns:1fr }
  .panel--light{ border-left:1px solid rgba(255,255,255,.13); border-top:0 }
}


/* ─────────────────────────────  6. CTA band  ───────────────────────────── */
.cta-band{ position:relative; overflow:hidden; background:var(--navy); color:#fff }
.cta-band::before{
  content:""; position:absolute; inset:0;
  background:
    radial-gradient(760px 380px at 82% 18%, rgba(18,52,113,.62), transparent 68%),
    radial-gradient(620px 320px at 8% 110%, rgba(0,183,255,.24), transparent 66%);
}
.cta-band__inner{
  position:relative; z-index:1;
  display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between;
  gap:30px; padding-block:clamp(64px,7vw,92px);
}
.cta-band__text{
  max-width:62ch; font-size:clamp(1.08rem,1.5vw,1.32rem); line-height:1.52;
  color:rgba(255,255,255,.92); font-weight:500;
}


/* ─────────────────────────────  Footer  ───────────────────────────── */
.site-footer{ background:var(--navy-900); color:var(--on-dark-dim) }
.footer-grid{
  display:grid; grid-template-columns:1.5fr 1fr 1fr 1fr; gap:clamp(28px,4vw,54px);
  padding-block:clamp(56px,6vw,78px);
}
.footer-brand p{ margin-top:20px; font-size:.9rem; line-height:1.62; max-width:34ch; color:var(--on-dark-dim) }
.footer-col h4{
  font-size:.76rem; font-weight:700; letter-spacing:.16em; text-transform:uppercase;
  color:#fff; margin-bottom:18px;
}
.footer-col ul{ list-style:none; margin:0; padding:0; display:grid; gap:10px }
.footer-col a{ font-size:.9rem; color:var(--on-dark-dim); transition:color .18s var(--ease) }
.footer-col a:hover{ color:#fff }

.footer-base{
  display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap:12px;
  padding-block:26px; border-top:1px solid var(--hair); font-size:.82rem; color:rgba(255,255,255,.42);
}
.footer-note{ letter-spacing:.05em }

@media (max-width:1000px){ .footer-grid{ grid-template-columns:1fr 1fr; gap:36px 28px } }
@media (max-width:620px){ .footer-grid{ grid-template-columns:1fr } }


/* ─────────────────────────────  toast  ───────────────────────────── */
.toast{
  position:fixed; left:50%; bottom:34px; transform:translate(-50%, 22px);
  z-index:200; max-width:min(90vw,460px);
  background:var(--navy-700); color:#fff; border:1px solid var(--hair);
  padding:14px 22px; border-radius:6px; font-size:.9rem; line-height:1.5;
  box-shadow:0 20px 48px rgba(0,0,0,.4);
  opacity:0; visibility:hidden; pointer-events:none;
  transition:opacity .28s var(--ease), transform .28s var(--ease), visibility .28s;
}
.toast.is-on{ opacity:1; visibility:visible; transform:translate(-50%, 0) }
.toast b{ color:var(--sky) }


/* ─────────────────────────────  Mobile nav  ───────────────────────────── */
@media (max-width:1080px){
  .nav-toggle{
    display:flex; flex-direction:column; justify-content:center; gap:5px;
    width:44px; height:44px; margin-left:auto; padding:0 10px; border-radius:var(--r);
  }
  .nav-toggle span{ display:block; height:2px; background:#fff; border-radius:2px; transition:transform .3s var(--ease), opacity .2s }
  .nav-toggle[aria-expanded="true"] span:nth-child(1){ transform:translateY(7px) rotate(45deg) }
  .nav-toggle[aria-expanded="true"] span:nth-child(2){ opacity:0 }
  .nav-toggle[aria-expanded="true"] span:nth-child(3){ transform:translateY(-7px) rotate(-45deg) }

  .primary{
    position:fixed; inset:78px 0 0 0; z-index:99;
    flex-direction:column; align-items:stretch; gap:0; margin:0;
    background:var(--navy-900); padding:22px var(--gut) 44px;
    overflow-y:auto; overscroll-behavior:contain;
    opacity:0; visibility:hidden; transform:translateY(-8px);
    transition:opacity .26s var(--ease), transform .26s var(--ease), visibility .26s;
  }
  .primary.is-open{ opacity:1; visibility:visible; transform:translateY(0) }
  body.nav-locked{ overflow:hidden }

  .nav-list{ flex-direction:column; align-items:stretch; gap:0 }
  .nav-list > li > a{
    justify-content:space-between; padding:16px 0; font-size:1.06rem; font-weight:600;
    color:#fff; border-bottom:1px solid var(--hair); border-radius:0;
  }
  .nav-list > li > a:hover{ background:none }
  .caret{ transform:rotate(45deg) }

  .drop{
    position:static; min-width:0; opacity:1; visibility:visible; transform:none;
    background:none; border:0; box-shadow:none; padding:0;
    display:none;
  }
  .has-drop.is-open .drop{ display:block; padding:6px 0 12px }
  .drop a{ padding:11px 0 11px 18px; font-size:.98rem; border-radius:0 }
  .drop a:hover{ background:none; color:#fff }

  .nav-cta{ margin-top:26px; align-self:flex-start; padding:15px 30px; font-size:1rem }
}

@media (min-width:1081px){ .primary{ position:static; opacity:1; visibility:visible; transform:none } }


/* ─────────────────────────────  Reduced motion  ───────────────────────────── */
@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto }
  *,*::before,*::after{ animation-duration:.001ms !important; animation-iteration-count:1 !important;
                        transition-duration:.001ms !important }
  .hero-tab.is-active .bar i{ transform:scaleX(1) }
}


/* ─────────────────────────────  Review mode (?review=1)  ───────────────────────────── */
.review-badge{
  position:absolute; top:10px; left:var(--gut); z-index:50;
  background:#ffd400; color:#111; font:700 11px/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing:.09em; padding:5px 9px; border-radius:3px; pointer-events:none;
}
body.review .block, body.review .trustbar, body.review .cta-band, body.review .site-footer{ position:relative }
body.review [data-rv]{ outline:1px dashed rgba(255,212,0,.75); outline-offset:-1px; position:relative }


/* ══════════════════════════════  Inner pages  ══════════════════════════════
   The homepage remains the visual source of truth. These components extend
   its colour, type and spacing rules to the 30 approved inner pages.       */

.inner-page .site-header{ background:#0d3d7b; box-shadow:0 1px 0 var(--hair),0 14px 34px rgba(0,0,0,.20) }
.inner-page .site-header::after{ display:none }
.inner-page .nav-list a[aria-current="page"]{ color:#fff; background:rgba(255,255,255,.10) }
.inner-page .drop a[aria-current="page"]{ color:#fff; background:rgba(255,255,255,.12) }

/* breadcrumb */
.breadcrumb{
  padding-top:78px; background:var(--navy-900); border-bottom:1px solid var(--hair);
  color:rgba(255,255,255,.64); font-size:.78rem; letter-spacing:.035em;
}
.breadcrumb .wrap{ min-height:44px; display:flex; align-items:center; gap:10px; overflow:hidden }
.breadcrumb a,.breadcrumb span{ white-space:nowrap }
.breadcrumb a{ color:rgba(255,255,255,.72); transition:color .18s var(--ease) }
.breadcrumb a:hover{ color:#fff }
.breadcrumb span[aria-current="page"]{ color:#fff; overflow:hidden; text-overflow:ellipsis }
.breadcrumb .wrap>span[aria-hidden="true"]{ color:rgba(255,255,255,.34) }

/* inner-page hero */
.page-hero{
  position:relative; min-height:clamp(520px,62vh,690px); display:flex; align-items:flex-end;
  overflow:hidden; isolation:isolate; background:var(--navy);
}
.page-hero__media{ position:absolute; inset:0; z-index:-2 }
.page-hero__media picture,.page-hero__media img{ width:100%; height:100% }
.page-hero__media img{ object-fit:cover; object-position:center }
.page-hero::after{
  content:""; position:absolute; inset:0; z-index:-1; pointer-events:none;
  background:rgba(6,38,86,.66);
}
.page-hero--plain::before{
  content:""; position:absolute; inset:0; z-index:-1; opacity:.18;
  background-image:linear-gradient(rgba(255,255,255,.11) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.11) 1px,transparent 1px);
  background-size:72px 72px;
}
.page-hero--plain::after{ background:rgba(6,38,86,.18) }
.page-hero__inner{ padding-block:clamp(86px,10vw,148px) clamp(72px,8vw,112px) }
.page-hero .eyebrow{ margin-bottom:22px }
.page-hero h1{
  color:#fff; max-width:23ch; font-size:clamp(2.1rem,4.35vw,4.65rem);
  line-height:1.04; letter-spacing:-.04em; text-wrap:balance;
}
.page-hero__lede{ max-width:74ch; margin-top:30px; color:rgba(255,255,255,.88); font-size:clamp(1rem,1.3vw,1.18rem) }
.page-hero__lede p{ line-height:1.67 }
.page-hero__lede p+p{ margin-top:16px }
.error-page{ min-height:75vh; align-items:center }
.error-page .hero-actions{ margin-top:36px }

/* section rhythm */
.inner-page .block{ padding-block:clamp(74px,8vw,124px) }
.inner-page .section-head{ max-width:860px; margin-bottom:clamp(30px,4vw,54px) }
.inner-page .section-head h2{ text-wrap:balance }
.inner-page .prose{ max-width:78ch }
.inner-page .prose p{ color:rgba(255,255,255,.82); font-size:clamp(.98rem,1.05vw,1.06rem); line-height:1.76 }
.inner-page .prose p+p{ margin-top:22px }
.inner-page .prose .lead{ color:#fff; font-size:clamp(1.04rem,1.24vw,1.18rem) }
.inner-page .split-2--media{ align-items:center }
.inner-page .split-2--media .figure{ min-height:360px }
.inner-page .split-2--media .figure img{ min-height:360px }

.text-link{
  display:inline-flex; align-items:center; gap:10px; margin-top:28px; color:#fff;
  font-weight:700; border-bottom:2px solid var(--primary); padding-bottom:4px;
}
.text-link span{ color:var(--sky); transition:transform .2s var(--ease) }
.text-link:hover span{ transform:translateX(5px) }

/* tables and data groups */
.table-scroll{
  width:100%; overflow-x:auto; margin-top:6px; border:1px solid rgba(255,255,255,.18);
  border-radius:var(--r); box-shadow:0 18px 42px rgba(0,0,0,.13);
  -webkit-overflow-scrolling:touch;
}
.table-scroll:focus-visible{ outline:3px solid var(--primary); outline-offset:3px }
.data-table{ width:100%; min-width:680px; border-collapse:collapse; background:rgba(255,255,255,.045) }
.data-table th,.data-table td{ padding:16px 18px; border-right:1px solid rgba(255,255,255,.10); border-bottom:1px solid rgba(255,255,255,.11); text-align:left; vertical-align:top; line-height:1.5 }
.data-table th:last-child,.data-table td:last-child{ border-right:0 }
.data-table tr:last-child th,.data-table tr:last-child td{ border-bottom:0 }
.data-table thead th{ background:var(--navy-900); color:#fff; font-size:.78rem; letter-spacing:.06em; text-transform:uppercase }
.data-table tbody th{ width:32%; color:#fff; background:rgba(255,255,255,.055); font-size:.91rem }
.data-table td{ color:rgba(255,255,255,.82); font-size:.9rem }
.data-table tbody tr:nth-child(even) td{ background:rgba(255,255,255,.035) }
.data-table--key{ min-width:560px }

.fact-grid{ margin:0; display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); border:1px solid rgba(255,255,255,.16) }
.fact-grid>div{ padding:25px; border-right:1px solid rgba(255,255,255,.13); border-bottom:1px solid rgba(255,255,255,.13) }
.fact-grid>div:nth-child(4n){ border-right:0 }
.fact-grid dt{ color:var(--sky); font-size:.72rem; font-weight:700; letter-spacing:.11em; text-transform:uppercase }
.fact-grid dd{ margin:9px 0 0; color:#fff; font-size:1rem; line-height:1.45 }

.data-list,.content-list{ list-style:none; margin:0; padding:0; display:grid; gap:0; border-top:1px solid rgba(255,255,255,.16) }
.data-list li,.content-list li{ position:relative; padding:16px 18px 16px 34px; border-bottom:1px solid rgba(255,255,255,.13); color:rgba(255,255,255,.84) }
.data-list li::before,.content-list li::before{ content:""; position:absolute; left:4px; top:1.45em; width:12px; height:2px; background:var(--primary) }

.process-flow{ list-style:none; margin:0; padding:0; display:grid; grid-template-columns:repeat(auto-fit,minmax(145px,1fr)); gap:1px; background:rgba(255,255,255,.16); border:1px solid rgba(255,255,255,.16) }
.process-flow li{ position:relative; min-height:112px; padding:23px 34px 23px 22px; display:flex; align-items:center; color:#fff; background:var(--navy-900); font-size:.9rem; line-height:1.42 }
.process-flow li:not(:last-child)::after{ content:"→"; position:absolute; right:10px; color:var(--primary); font-size:1.35rem }

/* listing grids */
.listing-grid{ list-style:none; margin:0; padding:0; display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:14px }
.listing-grid li{ min-width:0 }
.listing-grid a{
  min-height:118px; height:100%; display:flex; align-items:flex-end; justify-content:space-between; gap:20px;
  padding:24px; color:#fff; background:var(--navy-900); border:1px solid rgba(255,255,255,.14);
  font-weight:700; line-height:1.35; transition:background .2s var(--ease),transform .2s var(--ease),border-color .2s;
}
.listing-grid a:hover{ background:var(--navy-700); border-color:rgba(112,215,255,.55); transform:translateY(-2px) }
.listing-grid a span{ color:var(--sky); font-size:1.25rem; font-weight:400 }

/* FAQ */
.faq{ margin-top:34px }
.faq-item{ border-top:1px solid rgba(255,255,255,.18); border-bottom:1px solid rgba(255,255,255,.18) }
.faq-item summary{ list-style:none; position:relative; padding:22px 54px 22px 0; cursor:pointer; color:#fff; font-size:1.08rem; font-weight:700 }
.faq-item summary::-webkit-details-marker{ display:none }
.faq-item summary::after{ content:"+"; position:absolute; right:12px; top:14px; color:var(--primary); font-size:1.8rem; font-weight:400; transition:transform .2s var(--ease) }
.faq-item[open] summary::after{ transform:rotate(45deg) }
.faq-answer{ max-width:76ch; padding:0 54px 24px 0; color:rgba(255,255,255,.80) }

/* related links */
.related{ background:var(--navy-900); border-top:1px solid rgba(255,255,255,.12); padding-block:clamp(48px,5vw,72px) }
.related__label{ margin-bottom:18px; color:var(--sky); font-size:.72rem; font-weight:700; letter-spacing:.15em; text-transform:uppercase }
.related-grid{ display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:1px; background:rgba(255,255,255,.14) }
.related-card{ min-height:108px; display:flex; align-items:flex-end; justify-content:space-between; gap:18px; padding:20px; background:var(--navy); color:#fff; font-weight:700; line-height:1.35 }
.related-card i{ color:var(--primary); font-style:normal; font-size:1.2rem; transition:transform .2s var(--ease) }
.related-card:hover{ background:var(--navy-700) }
.related-card:hover i{ transform:translateX(5px) }

/* contact */
.contact-section .data-table--key{ max-width:780px; min-width:0; background:var(--navy-900) }
.contact-section .data-table--key th{ width:180px }
.contact-section .data-table--key td{ color:#fff; font-size:1.08rem }
.contact-section .data-table--key td a{ color:#fff; border-bottom:2px solid var(--primary) }

/* long-form engineering articles */
.article-wrap{ background:var(--navy); padding-block:clamp(68px,8vw,116px) }
.article-layout{ display:grid; grid-template-columns:minmax(220px,300px) minmax(0,1fr); gap:clamp(40px,6vw,100px); align-items:start }
.toc{ position:sticky; top:108px; padding:25px 24px; background:var(--navy-900); border:1px solid rgba(255,255,255,.14) }
.toc__title{ margin-bottom:15px; color:var(--sky); font-size:.72rem; font-weight:700; letter-spacing:.15em; text-transform:uppercase }
.toc ol{ list-style:none; margin:0; padding:0; display:grid; gap:2px }
.toc a{ display:block; padding:9px 0; border-bottom:1px solid rgba(255,255,255,.10); color:rgba(255,255,255,.73); font-size:.82rem; line-height:1.38 }
.toc a:hover{ color:#fff }
.article-body{ min-width:0; max-width:980px }
.article-section{ scroll-margin-top:112px; padding-bottom:clamp(52px,6vw,82px); margin-bottom:clamp(52px,6vw,82px); border-bottom:1px solid rgba(255,255,255,.16) }
.article-section:last-child{ margin-bottom:0; border-bottom:0 }
.article-section h2{ max-width:26ch; margin-bottom:30px; color:#fff; font-size:clamp(1.55rem,2.5vw,2.55rem); text-wrap:balance }
.article-section .prose{ max-width:72ch }
.article-section .prose p{ color:rgba(255,255,255,.82); font-size:1rem; line-height:1.82 }
.article-section .prose p+p{ margin-top:23px }
.article-section .table-scroll,.article-section .data-list,.article-section .process-flow{ margin-top:28px }
.article-conclusion{ margin-top:36px; padding:28px 30px; background:var(--navy-700); border-left:4px solid var(--primary); color:#fff }
.article-conclusion p+p{ margin-top:14px }
.section-kicker{ color:#b4d6ff; font-size:.72rem; font-weight:700; letter-spacing:.14em; text-transform:uppercase }

.cta-band__inner--single{ justify-content:flex-start }

@media (max-width:1080px){
  .fact-grid{ grid-template-columns:repeat(2,minmax(0,1fr)) }
  .fact-grid>div:nth-child(4n){ border-right:1px solid rgba(255,255,255,.13) }
  .fact-grid>div:nth-child(2n){ border-right:0 }
  .related-grid{ grid-template-columns:repeat(2,minmax(0,1fr)) }
  .article-layout{ grid-template-columns:1fr }
  .toc{ position:static; max-width:760px }
  .toc ol{ grid-template-columns:repeat(2,minmax(0,1fr)); gap:0 24px }
}

@media (max-width:900px){
  .page-hero{ min-height:570px }
  .listing-grid{ grid-template-columns:1fr }
  .inner-page .split-2--media .figure,.inner-page .split-2--media .figure img{ min-height:0 }
}

@media (max-width:720px){
  .page-hero h1{ font-size:clamp(2rem,9.7vw,3.15rem) }
  .page-hero__inner{ padding-block:76px 72px }
  .data-table th,.data-table td{ padding:14px; font-size:.84rem }
  .fact-grid{ grid-template-columns:1fr }
  .fact-grid>div,.fact-grid>div:nth-child(2n),.fact-grid>div:nth-child(4n){ border-right:0 }
  .related-grid{ grid-template-columns:1fr }
  .toc ol{ grid-template-columns:1fr }
}

@media (max-width:520px){
  .breadcrumb .wrap{ min-height:40px; gap:7px; font-size:.7rem }
  .page-hero{ min-height:520px }
  .page-hero__lede{ font-size:.96rem }
  .process-flow{ grid-template-columns:1fr }
  .process-flow li{ min-height:82px }
  .process-flow li:not(:last-child)::after{ content:"↓"; right:20px; bottom:-14px; top:auto; z-index:2 }
  .article-conclusion{ padding:24px 22px }
}