/* =========================================================
   云澹智能 · 官网样式
   Brand: #C8161D | Font: system CJK stack
   ========================================================= */
:root {
  --red: #C8161D;
  --red-dark: #A31016;
  --red-soft: #FBEDEE;
  --ink: #14161B;
  --ink-2: #1C2027;
  --text: #242A33;
  --muted: #616976;
  --line: #E6E8EC;
  --bg: #FFFFFF;
  --bg-alt: #F6F7F9;
  --dark-bg: #0E1116;
  --dark-card: #171B22;
  --dark-line: #272D38;
  --dark-text: #E7EAF0;
  --dark-muted: #9AA3B2;
  --radius: 14px;
  --shadow: 0 12px 32px rgba(16, 20, 28, 0.09);
  --shadow-sm: 0 4px 14px rgba(16, 20, 28, 0.07);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei",
    "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  --header-h: 72px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container { width: min(1180px, calc(100% - 48px)); margin: 0 auto; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.site-header.scrolled { border-bottom-color: var(--line); box-shadow: var(--shadow-sm); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand-logo { width: 44px; height: 44px; border-radius: 8px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong { font-size: 19px; letter-spacing: 0.06em; color: var(--ink); }
.brand-text small { font-size: 10.5px; letter-spacing: 0.14em; color: var(--muted); }

.site-nav { display: flex; align-items: center; gap: 6px; }
.site-nav > a {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 15.5px;
  color: var(--text);
  transition: color 0.2s, background 0.2s;
}
.site-nav > a:hover { color: var(--red); background: var(--red-soft); }
.site-nav > a.active { color: var(--red); font-weight: 600; }
.site-nav > a.btn { margin-left: 10px; }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 5px 0; border-radius: 2px; transition: 0.25s; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 10px;
  font-size: 15.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s, border-color 0.2s;
  cursor: pointer;
  border: 1px solid transparent;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--red); color: #fff; box-shadow: 0 8px 20px rgba(200, 22, 29, 0.28); }
.btn-primary:hover { background: var(--red-dark); }
.btn-ghost { border-color: rgba(255, 255, 255, 0.45); color: #fff; }
.btn-ghost:hover { border-color: #fff; background: rgba(255, 255, 255, 0.08); }
.btn-outline { border-color: var(--line); color: var(--ink); background: #fff; }
.btn-outline:hover { border-color: var(--red); color: var(--red); }
.btn-sm { padding: 9px 20px; font-size: 14.5px; }
.btn .arrow { transition: transform 0.2s; }
.btn:hover .arrow { transform: translateX(3px); }

/* ---------- Hero (home) ---------- */
.hero {
  position: relative;
  background: var(--dark-bg);
  color: #fff;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: url("../img/hero-plant.jpg") center 40% / cover no-repeat;
  opacity: 0.34;
  filter: saturate(0.4) contrast(1.02);
}
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(10, 12, 16, 0.92) 22%, rgba(10, 12, 16, 0.45) 62%, rgba(200, 22, 29, 0.22));
}
.hero-inner { position: relative; padding: 128px 0 96px; }
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  letter-spacing: 0.22em;
  color: #F2B8BB;
  margin-bottom: 22px;
}
.hero-eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--red); }
.hero h1 {
  font-size: clamp(34px, 5.2vw, 58px);
  line-height: 1.22;
  letter-spacing: 0.015em;
  font-weight: 700;
  max-width: 15em;
}
.hero h1 em { font-style: normal; color: #F26D72; }
.hero .hero-lead {
  margin-top: 24px;
  max-width: 40em;
  font-size: clamp(15.5px, 1.4vw, 18px);
  color: #C3C9D4;
}
.hero-actions { display: flex; gap: 16px; margin-top: 40px; flex-wrap: wrap; }

.hero-stats {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 72px 0 0;
}
.hero-stats li { background: rgba(14, 17, 22, 0.72); backdrop-filter: blur(6px); padding: 22px 26px; }
.hero-stats b { display: block; font-size: clamp(26px, 2.6vw, 34px); color: #fff; line-height: 1.2; font-variant-numeric: tabular-nums; }
.hero-stats b i { font-style: normal; color: #F26D72; }
.hero-stats span { font-size: 13.5px; color: var(--dark-muted); letter-spacing: 0.04em; }

/* ---------- Page hero (subpages) ---------- */
.page-hero { background: var(--ink); color: #fff; position: relative; overflow: hidden; }
.page-hero::after {
  content: "";
  position: absolute;
  right: -140px;
  top: -160px;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(200, 22, 29, 0.35), transparent 65%);
}
.page-hero .container { position: relative; padding: 76px 0 66px; }
.breadcrumb { font-size: 13px; letter-spacing: 0.18em; color: #F2B8BB; margin-bottom: 14px; }
.page-hero h1 { font-size: clamp(28px, 3.8vw, 42px); letter-spacing: 0.02em; }
.page-hero .lead { margin-top: 14px; max-width: 44em; color: #B9C0CC; font-size: 16.5px; }

/* ---------- Sections ---------- */
.section { padding: 88px 0; }
.section-alt { background: var(--bg-alt); }
.section-dark { background: var(--dark-bg); color: var(--dark-text); }
.section-head { max-width: 760px; margin-bottom: 52px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--red);
  margin-bottom: 14px;
}
.eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--red); }
.section-dark .eyebrow { color: #F26D72; }
.section-dark .eyebrow::before { background: #F26D72; }
.section-head h2 { font-size: clamp(25px, 3.2vw, 36px); color: var(--ink); line-height: 1.3; letter-spacing: 0.01em; }
.section-dark .section-head h2 { color: #fff; }
.section-head .lead { margin-top: 14px; color: var(--muted); font-size: 16.5px; }
.section-dark .section-head .lead { color: var(--dark-muted); }

/* ---------- Cards ---------- */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 28px;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: transparent; }
.card h3 { font-size: 19px; color: var(--ink); margin-bottom: 10px; }
.card p { font-size: 15px; color: var(--muted); }
.card .card-link { display: inline-flex; align-items: center; gap: 6px; margin-top: 16px; color: var(--red); font-weight: 600; font-size: 14.5px; }
.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: var(--red-soft);
  color: var(--red);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.card-icon svg { width: 26px; height: 26px; }

/* image cards */
.img-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.25s, box-shadow 0.25s;
  display: flex;
  flex-direction: column;
}
.img-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.img-card .img-wrap { aspect-ratio: 16 / 9; overflow: hidden; background: #fff; }
.img-card .img-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.img-card:hover .img-wrap img { transform: scale(1.04); }
.img-card .img-body { padding: 24px 26px 28px; }
.img-card h3 { font-size: 18.5px; color: var(--ink); margin-bottom: 8px; }
.img-card p { font-size: 14.5px; color: var(--muted); }
.img-card ul { margin-top: 12px; display: grid; gap: 8px; }
.img-card ul li { position: relative; padding-left: 16px; font-size: 13.5px; color: var(--muted); line-height: 1.6; }
.img-card ul li::before { content: ""; position: absolute; left: 0; top: 0.55em; width: 6px; height: 6px; border-radius: 2px; background: var(--red); }
.img-card .card-link { display: inline-flex; align-items: center; gap: 6px; margin-top: 16px; color: var(--red); font-weight: 600; font-size: 14.5px; }
.img-card .card-link:hover { text-decoration: underline; }
.section-dark .img-card .card-link { color: #F26D72; }

/* 核心产品区第二排：软件平台 */
.software-row { margin-top: 64px; }
.software-row .row-head { display: flex; align-items: baseline; gap: 18px; flex-wrap: wrap; margin-bottom: 28px; }
.software-row .row-head h3 { font-size: 21px; color: var(--ink); }
.software-row .row-head p { font-size: 14.5px; color: var(--muted); }

/* dark variant */
.section-dark .img-card { background: var(--dark-card); border-color: var(--dark-line); }
.section-dark .img-card h3 { color: #fff; }
.section-dark .img-card p { color: var(--dark-muted); }

/* feature blocks (alternating) */
.feature-row { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.feature-row + .feature-row { margin-top: 72px; }
.feature-row .feature-img { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--line); }
.feature-row .feature-img img { width: 100%; }
.feature-row h3 { font-size: clamp(20px, 2.2vw, 26px); color: var(--ink); margin-bottom: 6px; }
.feature-row .sub { color: var(--red); font-size: 13.5px; font-weight: 700; letter-spacing: 0.14em; margin-bottom: 14px; }
.feature-row p { color: var(--muted); font-size: 15.5px; }
.feature-row ul { margin-top: 18px; display: grid; gap: 10px; }
.feature-row ul li { position: relative; padding-left: 22px; color: var(--text); font-size: 15px; }
.feature-row ul li::before { content: ""; position: absolute; left: 0; top: 0.62em; width: 8px; height: 8px; border-radius: 2px; background: var(--red); }
.feature-row.reverse .feature-img { order: 2; }

/* check list */
.check-list li { position: relative; padding-left: 30px; }
.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  width: 20px;
  height: 20px;
  border-radius: 6px;
  background: var(--red-soft);
  color: var(--red);
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

/* ---------- Logo walls ---------- */
.logo-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.logo-chip {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px 14px;
  border-radius: 12px;
  background: #fff;
  border: 1px solid var(--line);
  min-height: 86px;
  transition: transform 0.2s, box-shadow 0.2s;
}
.logo-chip:hover { transform: translateY(-3px); box-shadow: var(--shadow-sm); }
.logo-chip img { max-height: 52px; max-width: 82%; object-fit: contain; }
.logo-chip.chip-dark { background: #10141A; border-color: #10141A; }

.section-dark .logo-chip { background: #10141A; border: 1px solid var(--dark-line); }
.section-dark .logo-chip.chip-lite { background: #fff; border-color: #fff; }
.logo-grid.eco-grid { grid-template-columns: repeat(8, 1fr); }

/* ---------- Partner feature ---------- */
.partner-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.partner-card .partner-tag { align-self: flex-start; font-size: 12.5px; font-weight: 700; letter-spacing: 0.14em; color: var(--red); background: var(--red-soft); padding: 5px 12px; border-radius: 999px; }
.partner-card h3 { font-size: 21px; color: var(--ink); }
.partner-card p { color: var(--muted); font-size: 15px; }
.partner-stats { display: flex; gap: 28px; margin-top: 6px; flex-wrap: wrap; }
.partner-stats div b { display: block; font-size: 24px; color: var(--red); line-height: 1.2; }
.partner-stats div span { font-size: 13px; color: var(--muted); }

/* ---------- Process chips ---------- */
.process { display: flex; flex-wrap: wrap; gap: 12px; }
.process li {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 9px 20px;
  font-size: 14.5px;
  color: var(--text);
  position: relative;
}
.process li b { color: var(--red); font-weight: 700; margin-right: 4px; }

/* ---------- Tag chips ---------- */
.chip-row { display: flex; flex-wrap: wrap; gap: 10px; }
.chip { background: #fff; border: 1px solid var(--line); color: var(--text); border-radius: 999px; padding: 7px 18px; font-size: 14px; }

/* ---------- Case page ---------- */
.case-block {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  padding: 56px 0;
  border-top: 1px solid var(--line);
  align-items: start;
}
.case-block:first-of-type { border-top: 0; padding-top: 0; }
.case-tag { display: inline-block; font-size: 12.5px; font-weight: 700; letter-spacing: 0.14em; color: var(--red); background: var(--red-soft); border-radius: 999px; padding: 5px 14px; margin-bottom: 16px; }
.case-block h2 { font-size: clamp(21px, 2.4vw, 27px); color: var(--ink); margin-bottom: 16px; line-height: 1.4; }
.case-block h4 { font-size: 15px; color: var(--ink); margin: 18px 0 6px; display: flex; align-items: center; gap: 8px; }
.case-block h4::before { content: ""; width: 4px; height: 16px; border-radius: 2px; background: var(--red); }
.case-block p, .case-block li { font-size: 15px; color: var(--muted); }
.case-block ul { display: grid; gap: 6px; margin-top: 4px; }
.case-block ul li { position: relative; padding-left: 20px; }
.case-block ul li::before { content: "·"; position: absolute; left: 4px; color: var(--red); font-weight: 700; }
.case-media { display: grid; gap: 20px; }
.case-media img { border-radius: var(--radius); border: 1px solid var(--line); box-shadow: var(--shadow-sm); width: 100%; }
.case-media.two { grid-template-columns: 1fr 1fr; align-items: start; }
.kpi-row { display: flex; gap: 32px; margin-top: 22px; flex-wrap: wrap; }
.kpi-row div b { display: block; font-size: 30px; color: var(--red); line-height: 1.15; font-variant-numeric: tabular-nums; }
.kpi-row div span { font-size: 13.5px; color: var(--muted); }

/* ---------- CTA band ---------- */
.cta-band { background: linear-gradient(115deg, #A31016, #C8161D 55%, #E0432F); color: #fff; }
.cta-band .container { display: flex; align-items: center; justify-content: space-between; gap: 32px; padding: 58px 0; flex-wrap: wrap; }
.cta-band h2 { font-size: clamp(22px, 2.8vw, 30px); letter-spacing: 0.02em; }
.cta-band p { color: rgba(255, 255, 255, 0.88); margin-top: 8px; font-size: 15.5px; }
.cta-band .btn { background: #fff; color: var(--red); box-shadow: 0 10px 24px rgba(0, 0, 0, 0.18); }
.cta-band .btn:hover { background: #FBEDEE; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 0.9fr; gap: 48px; align-items: stretch; }
.contact-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 40px; box-shadow: var(--shadow-sm); }
.contact-card h3 { font-size: 20px; color: var(--ink); margin-bottom: 24px; }
.contact-item { display: flex; gap: 16px; padding: 16px 0; border-top: 1px solid var(--line); }
.contact-item:first-of-type { border-top: 0; padding-top: 0; }
.contact-item .ci-icon { width: 42px; height: 42px; flex-shrink: 0; border-radius: 10px; background: var(--red-soft); color: var(--red); display: flex; align-items: center; justify-content: center; }
.contact-item .ci-icon svg { width: 20px; height: 20px; }
.contact-item b { display: block; font-size: 15px; color: var(--ink); }
.contact-item span { font-size: 14.5px; color: var(--muted); }
.contact-item a { color: var(--red); font-weight: 600; }
.contact-img { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.contact-img img { width: 100%; height: 100%; object-fit: cover; }

/* ---------- Value grid (about) ---------- */
.value-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 26px; transition: transform 0.25s, box-shadow 0.25s; }
.value-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.value-card b { display: flex; align-items: center; gap: 10px; font-size: 17px; color: var(--ink); margin-bottom: 10px; }
.value-card b::before { content: ""; width: 8px; height: 8px; border-radius: 2px; background: var(--red); flex-shrink: 0; }
.value-card p { font-size: 14.5px; color: var(--muted); }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: #AEB6C2; font-size: 14.5px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1.2fr; gap: 48px; padding: 64px 0 48px; }
.footer-brand .brand-text strong { color: #fff; }
.footer-brand .brand-text small { color: #7E8794; }
.footer-brand p { margin-top: 18px; max-width: 26em; color: #8B93A1; }
.footer-col h4 { color: #fff; font-size: 15.5px; letter-spacing: 0.08em; margin-bottom: 18px; }
.footer-col ul { display: grid; gap: 10px; }
.footer-col a:hover { color: #fff; }
.footer-col .fi { display: flex; gap: 10px; margin-bottom: 12px; align-items: flex-start; }
.footer-col .fi b { color: #C9CFD9; font-weight: 600; flex-shrink: 0; }
.footer-bottom { border-top: 1px solid #262B33; padding: 20px 0; }
.footer-bottom .container { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 13.5px; color: #7E8794; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: none; }
.no-anim .reveal, .no-anim .reveal:hover { opacity: 1; transform: none; transition: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 图片灯箱 ---------- */
img.zoomable { cursor: zoom-in; }
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(20px, 5vw, 56px);
  background: rgba(22, 24, 28, 0.82);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.32s ease, visibility 0s linear 0.32s;
}
.lightbox.open { opacity: 1; visibility: visible; transition: opacity 0.32s ease; }
.lightbox-stage {
  position: relative;
  transform: scale(0.94) translateY(12px);
  transition: transform 0.32s cubic-bezier(0.22, 1, 0.36, 1);
}
.lightbox.open .lightbox-stage { transform: none; }
.lightbox-img {
  display: block;
  max-width: min(88vw, 1160px);
  max-height: 76vh;
  width: auto;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.55);
}
.lightbox-close {
  position: absolute;
  top: -18px;
  right: -18px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid #fff;
  background: rgba(32, 34, 38, 0.6);
  color: #fff;
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  transition: transform 0.32s cubic-bezier(0.22, 1, 0.36, 1), background 0.2s ease;
}
.lightbox-close:hover { background: rgba(255, 255, 255, 0.18); transform: rotate(90deg); }
.lightbox-close svg { width: 18px; height: 18px; display: block; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .logo-grid { grid-template-columns: repeat(4, 1fr); }
  .logo-grid.eco-grid { grid-template-columns: repeat(4, 1fr); }
  .feature-row, .feature-row.reverse { grid-template-columns: 1fr; gap: 30px; }
  .feature-row.reverse .feature-img { order: 0; }
  .case-block { grid-template-columns: 1fr; gap: 28px; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
/* 窄平板及以下：汉堡菜单（避免桌面导航在 ~768px 挤爆） */
@media (max-width: 900px) {
  .site-nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 12px 24px 24px;
    gap: 4px;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
    display: none;
  }
  .site-nav.open { display: flex; }
  .site-nav > a { padding: 13px 10px; border-radius: 8px; }
  .site-nav > a.btn { margin: 10px 0 0; justify-content: center; }
  .nav-toggle { display: block; }
  .nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.open span:nth-child(2) { opacity: 0; }
  .nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}
@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .hero-inner { padding: 88px 0 72px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .logo-grid { grid-template-columns: repeat(3, 1fr); }
  .logo-grid.eco-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .cta-band .container { flex-direction: column; align-items: flex-start; }
  .case-media.two { grid-template-columns: 1fr; }
}