/* ===================================================================
   cnopassy.com — Nopassy Industrial Blower (static)
   Style: mobile-first, industrial B2B, deep-navy + electric accent
   Class convention: inv- prefixed BEM (matches template HTML exactly)
   =================================================================== */

:root {
  /* Brand */
  --c-primary:        #0B2A4A;   /* deep navy, corporate trust */
  --c-primary-dark:   #061a31;
  --c-primary-2:      #1B4E89;   /* mid blue, secondary */
  --c-accent:         #F26430;   /* industrial orange, action */
  --c-accent-dark:    #d34e1d;
  --c-gold:           #E4A951;   /* premium highlight */

  /* Neutrals */
  --c-bg:             #ffffff;
  --c-bg-soft:        #F5F7FA;
  --c-bg-tint:        #EDF1F7;
  --c-text:           #1A2332;
  --c-text-soft:      #4A5568;
  --c-text-mute:      #7B8794;
  --c-line:           #D9E0EA;
  --c-line-soft:      #ECF0F6;

  /* Semantic */
  --c-success:        #1F8A5A;
  --c-warning:        #E89A1B;
  --c-danger:         #C0392B;

  /* Type */
  --font-sans:        'Inter','Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,-apple-system,sans-serif;

  /* Sizing */
  --container:        1240px;
  --radius-sm:        6px;
  --radius:           10px;
  --radius-lg:        16px;
  --radius-xl:        24px;

  /* Shadow */
  --shadow-sm:        0 1px 2px rgba(11,42,74,.06), 0 1px 3px rgba(11,42,74,.04);
  --shadow:           0 4px 14px rgba(11,42,74,.07), 0 1px 4px rgba(11,42,74,.05);
  --shadow-lg:        0 18px 40px rgba(11,42,74,.12), 0 4px 12px rgba(11,42,74,.06);
  --shadow-accent:    0 12px 26px rgba(242,100,48,.22);

  /* Motion */
  --ease:             cubic-bezier(.22,.61,.36,1);
  --t-fast:           .14s;
  --t:                .25s;
  --t-slow:           .4s;
}

/* ------------------------------------------------------------------ */
/* Reset & base                                                        */
/* ------------------------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; font-family: var(--font-sans); color: var(--c-text);
  background: var(--c-bg); line-height: 1.6; font-size: 16px;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: var(--c-primary-2); text-decoration: none; }
a:hover { color: var(--c-accent); }
h1,h2,h3,h4 { line-height: 1.2; color: var(--c-primary); margin: 0 0 .5em; font-weight: 700; }
p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; cursor: pointer; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ------------------------------------------------------------------ */
/* Buttons                                                             */
/* ------------------------------------------------------------------ */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; height: 48px; padding: 0 22px; border-radius: 10px;
  font-weight: 600; font-size: 15px; letter-spacing: 0.01em;
  transition: all var(--t) var(--ease); cursor: pointer;
  border: 1px solid transparent;
}
.btn-primary { background: var(--c-accent); color: #fff; box-shadow: var(--shadow-accent); }
.btn-primary:hover { background: var(--c-accent-dark); color: #fff; transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--c-text); border-color: var(--c-line); }
.btn-ghost:hover { border-color: var(--c-primary); color: var(--c-primary); }
.btn-outline { background: transparent; color: #fff; border-color: rgba(255,255,255,.45); }
.btn-outline:hover { background: #fff; color: var(--c-primary); border-color: #fff; }
.btn-light { background: #fff; color: var(--c-primary); }
.btn-light:hover { background: var(--c-accent); color: #fff; }
.btn-sm { height: 38px; padding: 0 16px; font-size: 14px; border-radius: 8px; }
.btn-lg { height: 56px; padding: 0 28px; font-size: 16px; border-radius: 12px; }
.btn-block { width: 100%; }
.btn-download { background: var(--c-primary); color: #fff; }
.btn-download:hover { background: var(--c-primary-2); color: #fff; transform: translateY(-1px); }

/* Eyebrow label */
.eyebrow {
  display: inline-block; font-size: 12.5px; font-weight: 700; letter-spacing: .12em;
  text-transform: uppercase; color: var(--c-accent); margin-bottom: 14px;
}

/* ------------------------------------------------------------------ */
/* Language switch (top-right)                                         */
/* ------------------------------------------------------------------ */
.lang-switch {
  display: flex; gap: 6px; justify-content: flex-end; align-items: center;
  max-width: var(--container); margin: 0 auto; padding: 10px 24px 0;
}
.lang-switch a {
  font-size: 12.5px; font-weight: 600; padding: 4px 10px; border-radius: 999px;
  color: var(--c-text-mute);
}
.lang-switch a.active { background: var(--c-primary); color: #fff; }
.lang-switch a:hover { color: var(--c-accent); }
[dir="rtl"] .lang-switch { justify-content: flex-start; }

/* ------------------------------------------------------------------ */
/* Topbar                                                              */
/* ------------------------------------------------------------------ */
.inv-topbar { background: var(--c-primary-dark); color: rgba(255,255,255,.85); font-size: 13px; }
.inv-topbar__inner {
  max-width: var(--container); margin: 0 auto; padding: 8px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}
.inv-topbar__left { display: flex; gap: 20px; flex-wrap: wrap; }
.inv-topbar__left span { display: inline-flex; align-items: center; gap: 7px; }
.inv-topbar__left i { color: var(--c-accent); font-size: 13px; }
.inv-topbar__cta {
  color: #fff; font-weight: 700; display: inline-flex; align-items: center; gap: 7px;
}
.inv-topbar__cta:hover { color: var(--c-gold); }
.inv-topbar__cta i { transition: transform var(--t) var(--ease); }
.inv-topbar__cta:hover i { transform: translateX(3px); }

/* ------------------------------------------------------------------ */
/* Header / nav                                                        */
/* ------------------------------------------------------------------ */
.inv-header {
  position: sticky; top: 0; z-index: 50; background: #fff;
  border-bottom: 1px solid var(--c-line-soft);
}
.inv-header__inner {
  max-width: var(--container); margin: 0 auto; padding: 14px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
}
.inv-logo { display: inline-flex; align-items: center; gap: 12px; }
.inv-logo__text { display: flex; flex-direction: column; line-height: 1.1; }
.inv-logo__text strong { font-size: 22px; color: var(--c-primary); font-weight: 800; letter-spacing: -.01em; }
.inv-logo__text small { font-size: 11px; color: var(--c-text-mute); font-weight: 500; }
.inv-logo__img { height: 50px; width: auto; display: block; }
@media (max-width: 640px) { .inv-logo__img { height: 40px; } }

.inv-nav ul { display: flex; gap: 4px; }
.inv-nav > ul > li { position: relative; }
.inv-nav a {
  display: inline-block; padding: 10px 14px; font-weight: 600; font-size: 15px;
  color: var(--c-text); border-radius: 8px; transition: all var(--t) var(--ease);
}
.inv-nav a:hover, .inv-nav li.active > a { color: var(--c-primary); background: var(--c-bg-soft); }
.inv-nav .sub-menu {
  position: absolute; top: 100%; left: 0; min-width: 220px; background: #fff;
  border: 1px solid var(--c-line-soft); border-radius: var(--radius); box-shadow: var(--shadow-lg);
  padding: 8px; display: none; z-index: 60;
}
.inv-nav li:hover > .sub-menu { display: block; }
.inv-nav .sub-menu a { display: block; padding: 10px 14px; font-size: 14px; }
.inv-cta {
  background: var(--c-accent); color: #fff; padding: 12px 20px; border-radius: 10px;
  font-weight: 700; font-size: 14px; display: inline-flex; align-items: center; gap: 8px;
  box-shadow: var(--shadow-accent); white-space: nowrap;
}
.inv-cta:hover { background: var(--c-accent-dark); color: #fff; transform: translateY(-1px); }

.inv-nav-toggle {
  display: none; background: none; border: 0; font-size: 22px; color: var(--c-primary); padding: 6px;
}
.inv-mobile-menu { display: none; background: #fff; border-top: 1px solid var(--c-line-soft); }
.inv-mobile-menu.open { display: block; }
.inv-mobile-menu ul { padding: 8px 24px 20px; }
.inv-mobile-menu a { display: block; padding: 12px 0; font-weight: 600; color: var(--c-text); border-bottom: 1px solid var(--c-line-soft); }

/* ------------------------------------------------------------------ */
/* Hero                                                                */
/* ------------------------------------------------------------------ */
.inv-hero {
  position: relative;
  background:
    radial-gradient(1100px 600px at 80% -10%, rgba(27,78,137,.16), transparent 60%),
    linear-gradient(180deg, var(--c-bg-soft) 0%, #fff 100%);
  overflow: hidden;
}
.inv-hero__grid {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: center;
  padding: 72px 0 80px;
}
.inv-hero__text h1 { font-size: clamp(1.9rem, 3.6vw, 2.9rem); letter-spacing: -.02em; margin-bottom: 18px; }
.inv-hero__text > p { font-size: 1.12rem; color: var(--c-text-soft); max-width: 560px; }
.inv-hero__cta { display: flex; gap: 14px; flex-wrap: wrap; margin: 28px 0; }
.inv-hero__bullets { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 20px; margin-top: 8px; }
.inv-hero__bullets li { display: flex; gap: 10px; align-items: center; color: var(--c-text-soft); font-size: 14.5px; }
.inv-hero__bullets i { color: var(--c-success); flex-shrink: 0; }
.inv-hero__media {
  position: relative; aspect-ratio: 1/.95; border-radius: var(--radius-xl); overflow: hidden;
  box-shadow: var(--shadow-lg); background: var(--c-bg-tint);
}
.inv-hero__media img { width: 100%; height: 100%; object-fit: cover; }
.inv-hero__badges {
  position: absolute; left: 16px; right: 16px; bottom: 16px;
  display: flex; gap: 8px; flex-wrap: wrap;
}
.inv-hero__badges span {
  background: rgba(255,255,255,.94); backdrop-filter: blur(8px);
  border-radius: 999px; padding: 6px 12px; font-size: 12.5px; font-weight: 700;
  color: var(--c-primary); display: inline-flex; align-items: center; gap: 6px;
  box-shadow: var(--shadow-sm);
}
.inv-hero__badges i { color: var(--c-accent); }

/* ------------------------------------------------------------------ */
/* Stats strip                                                         */
/* ------------------------------------------------------------------ */
.inv-stats { background: var(--c-primary-dark); color: #fff; padding: 34px 0; }
.inv-stats__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center; }
.inv-stats__item { display: flex; flex-direction: column; gap: 4px; position: relative; }
.inv-stats__item:not(:last-child)::after {
  content: ''; position: absolute; right: -10px; top: 50%; transform: translateY(-50%);
  height: 36px; width: 1px; background: rgba(255,255,255,.14);
}
.inv-stats__item strong { font-size: 34px; font-weight: 800; color: var(--c-gold); letter-spacing: -.02em; }
.inv-stats__item span { font-size: 12.5px; color: rgba(255,255,255,.72); text-transform: uppercase; letter-spacing: .1em; }

/* ------------------------------------------------------------------ */
/* Sections                                                            */
/* ------------------------------------------------------------------ */
.inv-section { padding: 80px 0; }
.inv-section--alt { background: var(--c-bg-soft); }
.inv-section__head { margin-bottom: 44px; display: flex; flex-direction: column; gap: 10px; }
.inv-section__head h2 { font-size: clamp(1.5rem, 2.6vw, 2.1rem); letter-spacing: -.01em; }
.inv-section__head p { color: var(--c-text-soft); font-size: 1.05rem; max-width: 640px; margin: 0; }

/* ------------------------------------------------------------------ */
/* Product grid / cards                                                */
/* ------------------------------------------------------------------ */
.inv-product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.inv-product-card {
  background: #fff; border: 1px solid var(--c-line-soft); border-radius: var(--radius-lg);
  overflow: hidden; transition: all var(--t) var(--ease);
}
.inv-product-card a { display: flex; flex-direction: column; height: 100%; color: inherit; }
.inv-product-card:hover { border-color: transparent; box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.inv-product-card__img { aspect-ratio: 4/3; background: var(--c-bg-soft); overflow: hidden; }
.inv-product-card__img img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--t-slow) var(--ease); }
.inv-product-card:hover .inv-product-card__img img { transform: scale(1.06); }
.inv-product-card h3 { font-size: 16.5px; margin: 16px 18px 6px; }
.inv-product-card p { font-size: 13.5px; color: var(--c-text-soft); margin: 0 18px 14px; flex: 1; }
.inv-product-card__pow { font-size: 12.5px; color: var(--c-text-mute); margin: 0 18px; padding-bottom: 14px; }
.inv-product-card__cta {
  margin: 0 18px 16px; font-weight: 700; color: var(--c-primary-2); font-size: 14px;
  display: inline-flex; align-items: center; gap: 6px; align-self: flex-start;
}
.inv-product-card:hover .inv-product-card__cta { color: var(--c-accent); }

/* ------------------------------------------------------------------ */
/* Applications                                                        */
/* ------------------------------------------------------------------ */
.inv-app-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.inv-app-card {
  background: #fff; border-radius: var(--radius); padding: 22px;
  border: 1px solid var(--c-line-soft); transition: all var(--t) var(--ease);
}
.inv-app-card:hover { transform: translateY(-3px); border-color: var(--c-primary); box-shadow: var(--shadow); }
.inv-app-card i { width: 48px; height: 48px; background: rgba(27,78,137,.1); color: var(--c-primary-2); border-radius: 12px; display: inline-flex; align-items: center; justify-content: center; font-size: 24px; margin-bottom: 14px; }
.inv-app-card h4 { font-size: 16px; margin-bottom: 6px; }
.inv-app-card p { font-size: 13.5px; color: var(--c-text-soft); margin: 0; }

/* ------------------------------------------------------------------ */
/* Why us                                                              */
/* ------------------------------------------------------------------ */
.inv-why { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.inv-why__item {
  background: #fff; border: 1px solid var(--c-line-soft); border-radius: var(--radius-lg);
  padding: 30px; transition: all var(--t) var(--ease);
}
.inv-why__item:hover { box-shadow: var(--shadow); transform: translateY(-3px); }
.inv-why__item i {
  width: 56px; height: 56px; border-radius: 16px; font-size: 24px; margin-bottom: 18px;
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-2) 100%);
  color: #fff; display: inline-flex; align-items: center; justify-content: center;
}
.inv-why__item h4 { font-size: 18px; margin-bottom: 8px; }
.inv-why__item p { font-size: 14.5px; color: var(--c-text-soft); margin: 0; }

/* ------------------------------------------------------------------ */
/* Factory                                                             */
/* ------------------------------------------------------------------ */
.inv-factory { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.inv-factory img { border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); }
.inv-factory__text h2 { margin-bottom: 16px; }
.inv-factory__text ul li { display: flex; gap: 12px; padding: 11px 0; border-bottom: 1px dashed var(--c-line-soft); color: var(--c-text-soft); }
.inv-factory__text ul li:last-child { border-bottom: 0; }
.inv-factory__text ul li::before { content: '✓'; color: var(--c-success); font-weight: 800; flex-shrink: 0; }

/* ------------------------------------------------------------------ */
/* Specs comparison table                                              */
/* ------------------------------------------------------------------ */
.inv-spec-table { width: 100%; border-collapse: separate; border-spacing: 0; min-width: 680px; }
.inv-spec-table th, .inv-spec-table td { padding: 15px 18px; text-align: left; font-size: 14.5px; border-bottom: 1px solid var(--c-line-soft); }
.inv-spec-table thead th { background: var(--c-primary); color: #fff; font-weight: 700; border: 0; }
.inv-spec-table thead th:first-child { border-radius: 12px 0 0 0; }
.inv-spec-table thead th:last-child { border-radius: 0 12px 0 0; }
.inv-spec-table tbody tr { background: #fff; }
.inv-spec-table tbody tr:nth-child(odd) { background: #FBFCFD; }
.inv-spec-table tbody td:first-child { font-weight: 600; color: var(--c-primary); white-space: nowrap; }
.inv-section__head + .inv-spec-table-wrap, .inv-spec-table-wrap { overflow-x: auto; border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }
.inv-spec-table-wrap table { min-width: 680px; }

/* ------------------------------------------------------------------ */
/* Testimonials                                                        */
/* ------------------------------------------------------------------ */
.inv-testimonials { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.inv-testi {
  background: #fff; border: 1px solid var(--c-line-soft); border-radius: var(--radius-lg);
  padding: 28px; display: flex; flex-direction: column; gap: 14px;
}
.inv-testi__stars { color: var(--c-gold); letter-spacing: 2px; font-size: 14px; }
.inv-testi p { margin: 0; font-size: 15px; line-height: 1.7; color: var(--c-text-soft); flex: 1; }
.inv-testi strong { font-size: 13.5px; color: var(--c-primary); }

/* ------------------------------------------------------------------ */
/* FAQ                                                                 */
/* ------------------------------------------------------------------ */
.inv-faq { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.inv-faq details { background: #fff; border: 1px solid var(--c-line-soft); border-radius: var(--radius); overflow: hidden; transition: all var(--t) var(--ease); }
.inv-faq details:hover { border-color: var(--c-primary); }
.inv-faq summary { padding: 20px 24px; font-weight: 600; color: var(--c-primary); cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.inv-faq summary::after { content: '+'; font-size: 20px; color: var(--c-accent); font-weight: 700; transition: transform var(--t) var(--ease); }
.inv-faq details[open] summary::after { transform: rotate(45deg); }
.inv-faq summary::-webkit-details-marker { display: none; }
.inv-faq details p { margin: 0; padding: 0 24px 20px; font-size: 14.5px; color: var(--c-text-soft); }

/* ------------------------------------------------------------------ */
/* CTA strip                                                           */
/* ------------------------------------------------------------------ */
.inv-cta-strip {
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-2) 100%);
  color: #fff; padding: 72px 0; text-align: center;
  position: relative; overflow: hidden;
}
.inv-cta-strip h2 { color: #fff; font-size: clamp(1.6rem, 3vw, 2.3rem); }
.inv-cta-strip p { color: rgba(255,255,255,.8); font-size: 1.1rem; max-width: 560px; margin: 0 auto 28px; }
.inv-cta-strip .btn-primary { background: #fff; color: var(--c-primary); box-shadow: none; }
.inv-cta-strip .btn-primary:hover { background: var(--c-accent); color: #fff; }

/* ------------------------------------------------------------------ */
/* Inquiry form                                                        */
/* ------------------------------------------------------------------ */
.inquiry-section { padding: 80px 0; background: var(--c-bg-soft); }
.inquiry-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.inquiry-text h2 { font-size: clamp(1.5rem, 2.6vw, 2rem); }
.inquiry-text > p { color: var(--c-text-soft); }
.inquiry-bullets li { display: flex; gap: 10px; align-items: center; padding: 8px 0; color: var(--c-text-soft); font-size: 15px; }
.inquiry-bullets i { color: var(--c-success); }
.inquiry-form {
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-2) 100%);
  color: #fff; border-radius: var(--radius-xl); padding: 36px;
  display: flex; flex-direction: column; gap: 16px;
  box-shadow: var(--shadow-lg);
}
.inquiry-form label { display: flex; flex-direction: column; gap: 7px; font-size: 13.5px; font-weight: 500; color: rgba(255,255,255,.9); }
.inquiry-form input, .inquiry-form select {
  height: 48px; padding: 0 14px; border-radius: 9px; font-family: inherit; font-size: 15px;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.22); color: #fff;
  transition: all var(--t) var(--ease);
}
.inquiry-form input::placeholder { color: rgba(255,255,255,.5); }
.inquiry-form select option { color: var(--c-text); }
.inquiry-form input:focus, .inquiry-form select:focus { outline: none; background: rgba(255,255,255,.14); border-color: var(--c-accent); }
.inquiry-form .btn-primary { background: var(--c-accent); width: 100%; }
.inquiry-result { font-size: 14px; color: #fff; min-height: 20px; }

/* 询盘提交结果 / 失败兜底提示 */
.inquiry-alert { border-radius: 10px; padding: 14px 16px; font-size: 14px; line-height: 1.55; text-align: start; }
.inquiry-alert--ok { background: rgba(37,211,102,.16); border: 1px solid rgba(37,211,102,.5); color: #d8ffe8; }
.inquiry-alert--warn { background: rgba(255,255,255,.09); border: 1px solid rgba(255,255,255,.28); color: #fff; }
.inquiry-alert strong { display: block; margin-bottom: 6px; font-size: 14.5px; }
.inquiry-alert p { margin: 0 0 8px; color: rgba(255,255,255,.86); }
.inquiry-alert__actions { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 10px; }
.inquiry-alert__actions .btn { text-decoration: none; }
.inquiry-alert__addr { font-size: 13px; font-weight: 600; word-break: break-all; color: #fff; margin: 0 !important; }
.inquiry-alert__tech { margin-top: 10px; font-size: 12px; color: rgba(255,255,255,.55); }
.inquiry-alert__tech summary { cursor: pointer; }
.inquiry-alert__tech > * { word-break: break-word; }

/* ------------------------------------------------------------------ */
/* Catalog download section                                            */
/* ------------------------------------------------------------------ */
.inv-catalog { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.inv-catalog-card {
  display: flex; align-items: center; gap: 20px;
  background: #fff; border: 1px solid var(--c-line-soft); border-radius: var(--radius-lg);
  padding: 26px 28px; transition: all var(--t) var(--ease);
}
.inv-catalog-card:hover { border-color: transparent; box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.inv-catalog-card__icon {
  width: 60px; height: 60px; flex-shrink: 0; border-radius: 14px;
  background: rgba(242,100,48,.1); color: var(--c-accent);
  display: inline-flex; align-items: center; justify-content: center; font-size: 28px;
}
.inv-catalog-card__body { flex: 1; }
.inv-catalog-card__body h3 { font-size: 17px; margin-bottom: 4px; }
.inv-catalog-card__body p { font-size: 13.5px; color: var(--c-text-soft); margin: 0; }
.inv-catalog-card__meta { font-size: 12.5px; color: var(--c-text-mute); margin-top: 6px; }

/* ------------------------------------------------------------------ */
/* Breadcrumb + category hero                                          */
/* ------------------------------------------------------------------ */
.inv-breadcrumb { background: var(--c-bg-soft); border-bottom: 1px solid var(--c-line-soft); font-size: 13px; padding: 14px 0; color: var(--c-text-mute); }
.inv-breadcrumb a { color: var(--c-text-soft); }
.inv-breadcrumb span { margin: 0 8px; color: var(--c-line); }
.inv-breadcrumb strong { color: var(--c-text); font-weight: 600; }

.inv-cat-hero {
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(27,78,137,.16), transparent 60%),
    linear-gradient(180deg, var(--c-bg-soft) 0%, #fff 100%);
  padding: 64px 0;
}
.inv-cat-hero__grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.inv-cat-hero__text h1 { font-size: clamp(1.8rem, 3.2vw, 2.6rem); }
.inv-cat-hero__sub { font-size: 1.1rem; color: var(--c-text-soft); max-width: 560px; }
.inv-cat-hero__cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.inv-cat-hero__media { border-radius: var(--radius-xl); overflow: hidden; box-shadow: var(--shadow-lg); aspect-ratio: 1/.85; }
.inv-cat-hero__media img { width: 100%; height: 100%; object-fit: cover; }

/* ------------------------------------------------------------------ */
/* Feature cards (category pages)                                      */
/* ------------------------------------------------------------------ */
.inv-feature-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.inv-feature-card {
  background: #fff; border: 1px solid var(--c-line-soft); border-radius: var(--radius);
  padding: 22px; display: flex; flex-direction: column; gap: 12px;
  transition: all var(--t) var(--ease);
}
.inv-feature-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--c-primary); }
.inv-feature-card__num { font-size: 26px; font-weight: 800; color: var(--c-accent); line-height: 1; }
.inv-feature-card p { margin: 0; font-size: 14px; color: var(--c-text-soft); }

/* ------------------------------------------------------------------ */
/* Product detail                                                      */
/* ------------------------------------------------------------------ */
.inv-product-detail { padding: 48px 0 24px; }
.inv-product-detail__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.inv-product-detail__media { background: #fff; border: 1px solid var(--c-line-soft); border-radius: var(--radius-lg); padding: 18px; }
.inv-product-detail__media > img { aspect-ratio: 1/1; border-radius: var(--radius); object-fit: cover; width: 100%; }
.inv-product-detail__thumbs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-top: 12px; }
.inv-product-detail__thumbs img { aspect-ratio: 1/1; object-fit: cover; border-radius: 8px; border: 1px solid var(--c-line-soft); cursor: pointer; }
.inv-product-detail__thumbs img:hover { border-color: var(--c-accent); }
.inv-product-detail__info h1 { font-size: clamp(1.6rem, 2.6vw, 2.1rem); }
.inv-product-detail__desc { color: var(--c-text-soft); }
.inv-product-detail__kv {
  display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 20px 0;
  border-top: 1px solid var(--c-line-soft); border-bottom: 1px solid var(--c-line-soft); padding: 20px 0;
}
.inv-product-detail__kv div { display: flex; flex-direction: column; gap: 2px; }
.inv-product-detail__kv strong { color: var(--c-primary); font-size: 18px; font-weight: 800; }
.inv-product-detail__kv span { color: var(--c-text-mute); font-size: 12.5px; }
.inv-product-detail__cta { display: flex; gap: 10px; flex-wrap: wrap; }
.btn-whatsapp { background: #25D366; color: #fff; }
.btn-whatsapp:hover { background: #1eb356; color: #fff; transform: translateY(-1px); }

/* Tabs */
.inv-tabs__nav { display: flex; gap: 6px; border-bottom: 1px solid var(--c-line-soft); margin-bottom: 28px; overflow-x: auto; }
.inv-tabs__nav button {
  padding: 14px 22px; font-weight: 600; font-size: 15px; color: var(--c-text-soft);
  background: none; border: 0; border-bottom: 2px solid transparent; white-space: nowrap;
  transition: all var(--t) var(--ease);
}
.inv-tabs__nav button.active { color: var(--c-primary); border-bottom-color: var(--c-accent); }
.inv-tabs__panel[hidden] { display: none; }

/* Certification list */
.inv-cert-list { display: flex; gap: 12px; flex-wrap: wrap; }
.inv-cert-list span {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--c-bg-soft); border: 1px solid var(--c-line-soft);
  padding: 12px 18px; border-radius: 999px; font-weight: 600; font-size: 14px; color: var(--c-primary);
}
.inv-cert-list i { color: var(--c-accent); }

/* Download list */
.inv-download-list { display: flex; flex-direction: column; gap: 10px; }
.inv-download-list li {
  display: flex; align-items: center; gap: 12px;
  background: #fff; border: 1px solid var(--c-line-soft); border-radius: var(--radius);
  padding: 14px 18px; font-size: 14.5px; color: var(--c-text);
}
.inv-download-list i { color: var(--c-danger); font-size: 18px; }
.inv-download-list a { margin-left: auto; font-weight: 700; color: var(--c-primary-2); }
.inv-download-list a:hover { color: var(--c-accent); }

/* ------------------------------------------------------------------ */
/* Footer                                                              */
/* ------------------------------------------------------------------ */
.inv-footer { background: #06192e; color: rgba(255,255,255,.7); padding: 64px 0 0; }
.inv-footer__grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 48px; }
.inv-footer__col h4 { color: #fff; font-size: 13px; text-transform: uppercase; letter-spacing: .12em; margin-bottom: 20px; }
.inv-footer__col p { font-size: 13.5px; max-width: 340px; }
.inv-footer__col ul li { padding: 6px 0; }
.inv-footer__col ul a { color: rgba(255,255,255,.7); }
.inv-footer__col ul a:hover { color: var(--c-accent); }
.inv-footer__contact li { display: flex; align-items: center; gap: 10px; font-size: 14px; }
.inv-footer__contact i { color: var(--c-accent); width: 16px; text-align: center; }
.inv-footer__langs { display: flex; flex-direction: column; gap: 8px; }
.inv-footer__langs a { color: rgba(255,255,255,.7); }
.inv-footer__langs a:hover, .inv-footer__langs a.active { color: var(--c-accent); }
.inv-footer__bottom {
  border-top: 1px solid rgba(255,255,255,.08); margin-top: 48px; padding: 20px 0;
  font-size: 13px;
}
.inv-footer__bottom .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.inv-footer__bottom a { color: rgba(255,255,255,.7); }
.inv-footer__bottom a:hover { color: var(--c-accent); }

/* ------------------------------------------------------------------ */
/* Floating buttons                                                    */
/* ------------------------------------------------------------------ */
.inv-float { position: fixed; right: 18px; bottom: 24px; z-index: 70; display: flex; flex-direction: column; gap: 10px; }
[dir="rtl"] .inv-float { right: auto; left: 18px; }
.inv-float a {
  width: 54px; height: 54px; border-radius: 999px; display: inline-flex; align-items: center; justify-content: center;
  background: #fff; box-shadow: var(--shadow-lg); color: var(--c-primary); font-size: 22px;
  transition: all var(--t) var(--ease);
}
.inv-float__wa { background: #25D366 !important; color: #fff !important; }
.inv-float a:hover { transform: scale(1.08); }
.inv-float__top { opacity: 0; pointer-events: none; }
.inv-float__top.show { opacity: 1; pointer-events: auto; }

/* ------------------------------------------------------------------ */
/* Responsive                                                          */
/* ------------------------------------------------------------------ */
@media (max-width: 1024px) {
  .inv-hero__grid, .inv-cat-hero__grid { grid-template-columns: 1fr; gap: 36px; padding: 56px 0; }
  .inv-hero__media { aspect-ratio: 16/10; }
  .inv-product-grid { grid-template-columns: repeat(3, 1fr); }
  .inv-app-grid { grid-template-columns: repeat(3, 1fr); }
  .inv-why { grid-template-columns: repeat(2, 1fr); }
  .inv-testimonials { grid-template-columns: 1fr; }
  .inv-factory, .inv-product-detail__grid, .inquiry-grid { grid-template-columns: 1fr; }
  .inv-catalog { grid-template-columns: 1fr; }
  .inv-feature-grid { grid-template-columns: repeat(3, 1fr); }
  .inv-footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .inv-section, .inquiry-section { padding: 56px 0; }
  .lang-switch { justify-content: center; }
  .inv-topbar__left { justify-content: center; width: 100%; }
  .inv-nav { display: none; }
  .inv-cta { display: none; }
  .inv-nav-toggle { display: inline-flex; }
  .inv-hero__bullets { grid-template-columns: 1fr; }
  .inv-stats__grid { grid-template-columns: 1fr 1fr; }
  .inv-stats__item:nth-child(2)::after { display: none; }
  .inv-product-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
  .inv-app-grid { grid-template-columns: 1fr 1fr; }
  .inv-why { grid-template-columns: 1fr; }
  .inv-faq { grid-template-columns: 1fr; }
  .inv-feature-grid { grid-template-columns: 1fr 1fr; }
  .inv-catalog-card { flex-direction: column; align-items: flex-start; }
  .inv-footer__grid { grid-template-columns: 1fr; gap: 28px; }
  .inv-product-detail__kv { grid-template-columns: 1fr 1fr; }
  .inquiry-form { padding: 26px 20px; }
  .inv-hero__cta .btn, .inv-cat-hero__cta .btn { width: 100%; }
}

/* utility */
.no-scroll { overflow: hidden; }
[data-reveal] { opacity: 0; transform: translateY(14px); transition: all .6s var(--ease); }

/* ================================================================
   Resource / Application / Air-Knife / Stat / Doc / Spec sections
   ================================================================ */

/* Resource grid (resources.html) */
.inv-resource-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.inv-resource-card { background: #fff; border: 1px solid var(--c-line-soft); border-radius: var(--radius-lg); padding: 32px 28px; box-shadow: var(--shadow-sm); transition: all .25s var(--ease); }
.inv-resource-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--c-primary); }
.inv-resource-card__icon { width: 56px; height: 56px; border-radius: 14px; background: var(--c-primary-soft); color: var(--c-primary); display: inline-flex; align-items: center; justify-content: center; font-size: 26px; margin-bottom: 18px; }
.inv-resource-card h3 { font-size: 1.15rem; margin: 0 0 10px; letter-spacing: -.01em; }
.inv-resource-card p { color: var(--c-text-soft); font-size: 14.5px; line-height: 1.65; margin: 0 0 18px; }
.inv-resource-card__links { display: flex; flex-wrap: wrap; gap: 10px; }
.inv-resource-card__links .btn { font-size: 13px; padding: 9px 16px; }

/* Application grid (applications.html) */
.inv-app-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 22px; }
.inv-app-card { background: #fff; border: 1px solid var(--c-line-soft); border-radius: var(--radius-lg); padding: 28px 24px; box-shadow: var(--shadow-sm); transition: all .25s var(--ease); }
.inv-app-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--c-primary); }
.inv-app-card__icon { width: 52px; height: 52px; border-radius: 12px; background: var(--c-accent-soft, #fef3c7); color: var(--c-accent, #d97706); display: inline-flex; align-items: center; justify-content: center; font-size: 24px; margin-bottom: 16px; }
.inv-app-card h3 { font-size: 1.1rem; margin: 0 0 10px; }
.inv-app-card p { color: var(--c-text-soft); font-size: 14.5px; line-height: 1.65; margin: 0 0 16px; }
.inv-app-card__product { display: inline-flex; align-items: center; gap: 8px; padding: 7px 14px; background: var(--c-primary-soft); color: var(--c-primary); border-radius: 999px; font-size: 12.5px; font-weight: 600; }
.inv-app-card__product i { font-size: 11px; }

/* Air-Knife card (air-knife-systems.html) */
.inv-ak-card { background: #fff; border: 1px solid var(--c-line-soft); border-radius: var(--radius-lg); padding: 36px 32px; box-shadow: var(--shadow-sm); }
.inv-ak-card h2 { font-size: 1.5rem; margin: 0 0 8px; letter-spacing: -.01em; }
.inv-ak-card__tagline { color: var(--c-text-soft); font-size: 1rem; margin: 0 0 28px; font-style: italic; }
.inv-ak-card__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; }
@media (max-width: 860px) { .inv-ak-card__grid { grid-template-columns: 1fr; gap: 24px; } }
.inv-ak-card h3 { font-size: 1.05rem; margin: 0 0 14px; color: var(--c-primary); }
.inv-ak-card__highlights ul { padding: 0; margin: 0 0 20px; list-style: none; }
.inv-ak-card__highlights li { padding: 8px 0 8px 28px; position: relative; font-size: 14.5px; color: var(--c-text); line-height: 1.6; }
.inv-ak-card__highlights li::before { content: "✓"; position: absolute; left: 0; top: 8px; width: 20px; height: 20px; background: var(--c-primary-soft); color: var(--c-primary); border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; font-size: 11px; font-weight: 700; }

/* Stat cards (bottle-drying, quality) */
.inv-stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px; }
.inv-stat-card { background: linear-gradient(135deg, var(--c-primary) 0%, #1e40af 100%); color: #fff; padding: 32px 24px; border-radius: var(--radius-lg); text-align: center; box-shadow: var(--shadow); }
.inv-stat-card__value { font-size: 2.5rem; font-weight: 800; line-height: 1; letter-spacing: -.02em; }
.inv-stat-card__unit { font-size: .9rem; opacity: .85; margin: 4px 0 8px; font-weight: 600; }
.inv-stat-card__label { font-size: .85rem; opacity: .9; line-height: 1.4; }

/* Feature card variant for bottle-drying */
.inv-feature-card__icon { width: 52px; height: 52px; border-radius: 12px; background: var(--c-primary-soft); color: var(--c-primary); display: inline-flex; align-items: center; justify-content: center; font-size: 22px; margin-bottom: 14px; }
.inv-feature-card h4 { font-size: 1.05rem; margin: 0 0 8px; }
.inv-feature-card p { font-size: 14px; color: var(--c-text-soft); line-height: 1.6; margin: 0; }

/* Doc grid (quality.html) */
.inv-doc-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 22px; }
.inv-doc-card { background: #fff; border: 1px solid var(--c-line-soft); border-radius: var(--radius-lg); padding: 26px 24px; box-shadow: var(--shadow-sm); transition: all .25s var(--ease); }
.inv-doc-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.inv-doc-card__icon { width: 48px; height: 48px; border-radius: 12px; background: var(--c-primary-soft); color: var(--c-primary); display: inline-flex; align-items: center; justify-content: center; font-size: 22px; margin-bottom: 14px; }
.inv-doc-card h4 { font-size: 1rem; margin: 0 0 8px; }
.inv-doc-card p { font-size: 13.5px; color: var(--c-text-soft); line-height: 1.6; margin: 0; }

/* Safety list (maintenance.html) */
.inv-safety-list { padding: 0; margin: 0; list-style: none; counter-reset: safety; }
.inv-safety-list li { counter-increment: safety; padding: 16px 20px 16px 64px; margin-bottom: 12px; background: #fff; border: 1px solid var(--c-line-soft); border-left: 4px solid var(--c-accent, #d97706); border-radius: 8px; position: relative; line-height: 1.65; font-size: 15px; }
.inv-safety-list li::before { content: counter(safety); position: absolute; left: 18px; top: 16px; width: 32px; height: 32px; background: var(--c-accent, #d97706); color: #fff; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; font-weight: 700; font-size: 14px; }
.inv-safety-list li .fa-triangle-exclamation { display: none; }

/* Warranty list */
.inv-warranty-list { padding: 0; margin: 0; list-style: none; }
.inv-warranty-list li { padding: 12px 0 12px 32px; position: relative; font-size: 15px; color: var(--c-text); line-height: 1.6; border-bottom: 1px solid var(--c-line-soft); }
.inv-warranty-list li:last-child { border-bottom: 0; }
.inv-warranty-list li i { position: absolute; left: 0; top: 14px; color: var(--c-primary); }
.inv-warranty-scope { background: var(--c-primary-soft); border-left: 4px solid var(--c-primary); padding: 18px 22px; border-radius: 8px; font-size: 14.5px; line-height: 1.7; color: var(--c-text); margin: 32px 0 0; }

/* Spec note */
.inv-spec-note { display: flex; align-items: flex-start; gap: 10px; padding: 16px 18px; background: #fffbeb; border: 1px solid #fde68a; border-radius: 8px; font-size: 14px; color: #92400e; line-height: 1.6; margin-top: 18px; }
.inv-spec-note i { color: #d97706; flex-shrink: 0; margin-top: 2px; }

/* RTL adjustments */
body.rtl .inv-safety-list li { padding: 16px 64px 16px 20px; }
body.rtl .inv-safety-list li::before { left: auto; right: 18px; }
body.rtl .inv-warranty-list li { padding: 12px 32px 12px 0; }
body.rtl .inv-warranty-list li i { left: auto; right: 0; }
body.rtl .inv-warranty-scope { border-left: 0; border-right: 4px solid var(--c-primary); }
body.rtl .inv-spec-note { flex-direction: row-reverse; }
body.rtl .inv-ak-card__highlights li { padding: 8px 28px 8px 0; }
body.rtl .inv-ak-card__highlights li::before { left: auto; right: 0; }
body.rtl .inv-resource-card__links { flex-direction: row-reverse; }
body.rtl .inv-app-card__product { flex-direction: row-reverse; }