/* ============================================================
   沛敬新农 · 全站样式
   ============================================================ */
:root {
  --green-950: #0f2a1d;
  --green-900: #16382a;
  --green-700: #1f5b3c;
  --green-600: #2a7a4f;
  --green-500: #3f9663;
  --wheat: #d8a437;
  --wheat-deep: #b8860b;
  --paper: #f7f6f1;
  --card: #ffffff;
  --ink: #1c2b22;
  --ink-soft: #55655c;
  --line: #e4e1d5;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(22, 56, 42, 0.08);
  --shadow-lg: 0 18px 50px rgba(22, 56, 42, 0.14);
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container { width: min(1180px, 92%); margin: 0 auto; }

/* ---------- 通用文本 ---------- */
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 4px;
  color: var(--green-600);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.kicker::before {
  content: "";
  width: 28px; height: 2px;
  background: var(--wheat);
}
h1, h2, h3 { font-family: var(--serif); color: var(--green-900); line-height: 1.3; }
.section-title { font-size: clamp(26px, 3.4vw, 38px); font-weight: 700; }
.section-sub { color: var(--ink-soft); margin-top: 12px; max-width: 640px; }
.section { padding: 96px 0; }
.section-head { margin-bottom: 52px; }
.section-head.center { text-align: center; }
.section-head.center .section-sub { margin-left: auto; margin-right: auto; }
.section-head.center .kicker::before { display: none; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .25s ease;
}
.btn-primary { background: var(--green-700); color: #fff; }
.btn-primary:hover { background: var(--green-600); transform: translateY(-2px); box-shadow: var(--shadow); }
.btn-ghost { border-color: rgba(255,255,255,.55); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.12); }
.btn-outline { border-color: var(--green-700); color: var(--green-700); background: transparent; }
.btn-outline:hover { background: var(--green-700); color: #fff; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: rgba(247, 246, 241, 0.86);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: all .3s ease;
}
.site-header.scrolled { border-bottom-color: var(--line); box-shadow: 0 4px 20px rgba(22,56,42,.06); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark { width: 40px; height: 40px; flex: none; }
.brand-name { font-family: var(--serif); font-size: 21px; font-weight: 700; color: var(--green-900); letter-spacing: 2px; }
.brand-name small { display: block; font-family: var(--sans); font-size: 10px; letter-spacing: 3px; color: var(--ink-soft); font-weight: 500; }

.main-nav ul { display: flex; gap: 6px; }
.main-nav a {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  color: var(--ink-soft);
  border-radius: 8px;
  transition: all .2s;
}
.main-nav a:hover { color: var(--green-700); background: rgba(31,91,60,.06); }
.main-nav a.active { color: var(--green-700); font-weight: 600; position: relative; }
.main-nav a.active::after {
  content: ""; position: absolute; left: 16px; right: 16px; bottom: 2px;
  height: 2px; background: var(--wheat); border-radius: 2px;
}
.header-cta { display: inline-flex; }
.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 10px;
  cursor: pointer;
  position: relative;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; position: absolute; left: 50%; top: 50%;
  width: 18px; height: 2px; background: var(--green-900);
  transform: translate(-50%, -50%); transition: all .25s;
}
.nav-toggle span::before { transform: translate(-50%, calc(-50% - 6px)); }
.nav-toggle span::after { transform: translate(-50%, calc(-50% + 6px)); }
.nav-toggle.open span { background: transparent; }
.nav-toggle.open span::before { transform: translate(-50%, -50%) rotate(45deg); }
.nav-toggle.open span::after { transform: translate(-50%, -50%) rotate(-45deg); }

/* ---------- 首屏 Hero ---------- */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  color: #fff;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background: url("../img/hero.jpg") center 38% / cover no-repeat;
  transform: scale(1.06);
  animation: heroZoom 14s ease-out forwards;
}
@keyframes heroZoom { to { transform: scale(1); } }
.hero::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(15,42,29,.82) 0%, rgba(15,42,29,.55) 46%, rgba(15,42,29,.18) 100%);
}
.hero-inner { position: relative; z-index: 2; padding: 140px 0 120px; max-width: 720px; }
.hero-tag {
  display: inline-flex; align-items: center; gap: 10px;
  border: 1px solid rgba(255,255,255,.35);
  padding: 6px 18px; border-radius: 999px;
  font-size: 13px; letter-spacing: 3px; margin-bottom: 28px;
  background: rgba(255,255,255,.08);
}
.hero-tag i { width: 7px; height: 7px; border-radius: 50%; background: var(--wheat); }
.hero h1 {
  color: #fff;
  font-size: clamp(34px, 5.4vw, 60px);
  font-weight: 700;
  letter-spacing: 2px;
  margin-bottom: 22px;
}
.hero h1 em { font-style: normal; color: var(--wheat); }
.hero p { font-size: clamp(15px, 1.6vw, 18px); color: rgba(255,255,255,.82); max-width: 560px; margin-bottom: 40px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* ---------- 数据条 ---------- */
.stats-band { position: relative; z-index: 5; margin-top: -72px; }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.stat {
  padding: 34px 20px;
  text-align: center;
  border-left: 1px solid var(--line);
}
.stat:first-child { border-left: none; }
.stat-num {
  font-family: var(--serif);
  font-size: 36px;
  font-weight: 700;
  color: var(--green-700);
}
.stat-num sup { font-size: 16px; color: var(--wheat-deep); margin-left: 2px; }
.stat-label { font-size: 14px; color: var(--ink-soft); margin-top: 4px; letter-spacing: 1px; }

/* ---------- 分栏图文 ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.split-media { position: relative; }
.split-media img { border-radius: var(--radius); box-shadow: var(--shadow-lg); width: 100%; height: 460px; object-fit: cover; }
.split-media .media-badge {
  position: absolute;
  left: -20px; bottom: 28px;
  background: var(--green-900);
  color: #fff;
  padding: 18px 24px;
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  font-size: 13px;
  line-height: 1.6;
}
.media-badge b { display: block; font-family: var(--serif); font-size: 22px; color: var(--wheat); }
.split-text .section-title { margin-bottom: 18px; }
.split-text p { color: var(--ink-soft); margin-bottom: 14px; }
.split-text .btn { margin-top: 14px; }

.check-list { margin: 18px 0 6px; }
.check-list li {
  position: relative;
  padding-left: 30px;
  margin-bottom: 10px;
  color: var(--ink);
}
.check-list li::before {
  content: "";
  position: absolute; left: 0; top: 9px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--green-600) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3'%3E%3Cpath d='M5 13l4 4 10-10'/%3E%3C/svg%3E") center/10px no-repeat;
}

/* ---------- 业务卡片 ---------- */
.cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.biz-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all .3s ease;
}
.biz-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.biz-card .card-img { height: 220px; overflow: hidden; }
.biz-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.biz-card:hover .card-img img { transform: scale(1.05); }
.biz-card .card-body { padding: 28px; }
.biz-no {
  font-family: var(--serif);
  font-size: 14px;
  color: var(--wheat-deep);
  letter-spacing: 2px;
  margin-bottom: 8px;
  display: block;
}
.biz-card h3 { font-size: 21px; margin-bottom: 10px; }
.biz-card p { color: var(--ink-soft); font-size: 14.5px; }
.card-link {
  display: inline-block;
  margin-top: 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--green-700);
}
.card-link:hover { color: var(--green-600); }

/* ---------- 全链路 ---------- */
.chain-section { background: var(--green-900); color: #fff; position: relative; overflow: hidden; }
.chain-section::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(600px 300px at 85% 10%, rgba(216,164,55,.12), transparent),
    radial-gradient(500px 300px at 10% 90%, rgba(63,150,99,.18), transparent);
}
.chain-section .section-title, .chain-section h3 { color: #fff; }
.chain-section .kicker { color: var(--wheat); }
.chain-section .section-sub { color: rgba(255,255,255,.65); }
.chain-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}
.chain-step {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius);
  padding: 28px 20px;
  transition: all .3s;
}
.chain-step:hover { background: rgba(255,255,255,.1); transform: translateY(-4px); }
.chain-step .step-no {
  font-family: var(--serif);
  font-size: 30px;
  color: var(--wheat);
  margin-bottom: 12px;
  display: block;
}
.chain-step h3 { font-size: 17px; margin-bottom: 8px; letter-spacing: 1px; }
.chain-step p { font-size: 13px; color: rgba(255,255,255,.62); line-height: 1.7; }

/* ---------- 产品分类 ---------- */
.cats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.cat-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  height: 340px;
  display: flex;
  align-items: flex-end;
  color: #fff;
}
.cat-card img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .6s ease;
}
.cat-card:hover img { transform: scale(1.06); }
.cat-card::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 35%, rgba(15,42,29,.85) 100%);
}
.cat-body { position: relative; z-index: 2; padding: 26px; }
.cat-body h3 { color: #fff; font-size: 21px; margin-bottom: 6px; }
.cat-body p { font-size: 13px; color: rgba(255,255,255,.75); }
.cat-body .cat-more {
  display: inline-block;
  margin-top: 12px;
  font-size: 13px;
  color: var(--wheat);
  font-weight: 600;
}

/* ---------- 溯源 ---------- */
.trace-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 64px; align-items: center; }
.trace-points { margin-top: 26px; }
.trace-point {
  display: flex;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px dashed var(--line);
}
.trace-point:last-child { border-bottom: none; }
.trace-point .tp-icon {
  flex: none;
  width: 44px; height: 44px;
  border-radius: 12px;
  background: rgba(31,91,60,.08);
  display: grid;
  place-items: center;
  color: var(--green-700);
}
.trace-point h4 { font-size: 16px; margin-bottom: 4px; font-family: var(--sans); font-weight: 600; color: var(--green-900); }
.trace-point p { font-size: 13.5px; color: var(--ink-soft); }
.trace-visual { position: relative; }
.trace-visual img { border-radius: var(--radius); box-shadow: var(--shadow-lg); width: 100%; height: 420px; object-fit: cover; }
.trace-float {
  position: absolute;
  right: -18px; top: 32px;
  background: #fff;
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  padding: 16px 20px;
  font-size: 12.5px;
  color: var(--ink-soft);
  line-height: 1.8;
}
.trace-float b { display: block; color: var(--green-700); font-size: 14px; }

/* ---------- 新闻 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.news-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all .3s;
  display: flex;
  flex-direction: column;
}
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.news-card .card-img { height: 190px; overflow: hidden; }
.news-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s; }
.news-card:hover .card-img img { transform: scale(1.05); }
.news-card .card-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.news-meta { font-size: 12.5px; color: var(--ink-soft); display: flex; gap: 14px; margin-bottom: 10px; }
.news-meta .tag { color: var(--wheat-deep); font-weight: 600; }
.news-card h3 { font-size: 17.5px; line-height: 1.55; margin-bottom: 10px; }
.news-card p { font-size: 13.5px; color: var(--ink-soft); flex: 1; }

/* ---------- CTA ---------- */
.cta-band {
  background: linear-gradient(110deg, var(--green-900), var(--green-700));
  border-radius: 24px;
  color: #fff;
  padding: 64px 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  position: relative;
  overflow: hidden;
}
.cta-band::after {
  content: "";
  position: absolute; right: -60px; top: -60px;
  width: 260px; height: 260px;
  border-radius: 50%;
  border: 40px solid rgba(216,164,55,.15);
}
.cta-band h2 { color: #fff; font-size: clamp(22px, 3vw, 32px); margin-bottom: 10px; }
.cta-band p { color: rgba(255,255,255,.75); }
.cta-band .btn-primary { background: var(--wheat); color: var(--green-950); }
.cta-band .btn-primary:hover { background: #e6b552; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--green-950); color: rgba(255,255,255,.68); margin-top: 96px; }
.footer-main {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding: 72px 0 48px;
}
.footer-brand .brand-name { color: #fff; }
.footer-brand .brand-name small { color: rgba(255,255,255,.45); }
.footer-brand p { font-size: 13.5px; margin-top: 18px; max-width: 300px; }
.footer-col h4 {
  color: #fff;
  font-size: 15px;
  letter-spacing: 2px;
  margin-bottom: 20px;
  font-family: var(--sans);
  font-weight: 600;
}
.footer-col li { margin-bottom: 12px; font-size: 13.5px; }
.footer-col a:hover { color: var(--wheat); }
.footer-contact li { display: flex; gap: 10px; }
.footer-contact svg { flex: none; margin-top: 4px; color: var(--wheat); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 12.5px;
  color: rgba(255,255,255,.45);
}
.footer-bottom a:hover { color: var(--wheat); }
.beian-links { display: flex; gap: 18px; flex-wrap: wrap; }

/* ---------- 内页 banner ---------- */
.page-hero {
  position: relative;
  padding: 180px 0 90px;
  color: #fff;
  overflow: hidden;
  background: var(--green-900);
}
.page-hero .hero-bg { opacity: .5; animation: none; transform: none; }
.page-hero .hero-bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(15,42,29,.35), rgba(15,42,29,.75)); }
.page-hero-inner { position: relative; z-index: 2; }
.page-hero h1 { color: #fff; font-size: clamp(30px, 4.4vw, 46px); margin-bottom: 14px; letter-spacing: 2px; }
.page-hero .crumb { font-size: 13.5px; color: rgba(255,255,255,.6); letter-spacing: 1px; }
.page-hero .crumb a:hover { color: var(--wheat); }
.page-hero .crumb span { margin: 0 8px; color: rgba(255,255,255,.35); }

/* ---------- 关于页 ---------- */
.timeline { position: relative; max-width: 760px; margin: 0 auto; padding-left: 34px; }
.timeline::before {
  content: "";
  position: absolute; left: 6px; top: 6px; bottom: 6px;
  width: 2px;
  background: linear-gradient(var(--green-600), var(--wheat));
}
.timeline-item { position: relative; padding-bottom: 44px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: "";
  position: absolute; left: -34px; top: 8px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--green-600);
}
.timeline-item .tl-year {
  font-family: var(--serif);
  font-size: 22px;
  color: var(--green-700);
  font-weight: 700;
  margin-bottom: 6px;
}
.timeline-item h3 { font-size: 17px; margin-bottom: 6px; }
.timeline-item p { color: var(--ink-soft); font-size: 14.5px; }

.values-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.value-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px 30px;
  transition: all .3s;
}
.value-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.value-card .vc-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--green-600), var(--green-900));
  display: grid; place-items: center;
  color: #fff;
  margin-bottom: 20px;
}
.value-card h3 { font-size: 18px; margin-bottom: 8px; }
.value-card p { font-size: 14px; color: var(--ink-soft); }

/* ---------- 产品页 ---------- */
.cat-block { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 56px; align-items: center; padding: 56px 0; border-bottom: 1px solid var(--line); }
.cat-block:last-of-type { border-bottom: none; }
.cat-block.reverse .cb-media { order: 2; }
.cb-media img { border-radius: var(--radius); box-shadow: var(--shadow); width: 100%; height: 360px; object-fit: cover; }
.cb-body h3 { font-size: 24px; margin-bottom: 8px; }
.cb-body .cb-en { font-size: 12.5px; letter-spacing: 3px; color: var(--wheat-deep); text-transform: uppercase; }
.cb-body > p { color: var(--ink-soft); margin: 14px 0 20px; font-size: 15px; }
.spec-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 24px; }
.spec-list li {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 13.5px;
  color: var(--ink-soft);
}
.spec-list li b { color: var(--green-900); font-weight: 600; display: block; font-size: 13px; margin-bottom: 2px; }

/* ---------- 新闻列表页 ---------- */
.news-list-page .news-grid { row-gap: 44px; }

/* ---------- 联系页 ---------- */
.contact-layout { display: grid; grid-template-columns: 1fr 1.2fr; gap: 56px; align-items: start; }
.contact-info-card {
  background: var(--green-900);
  color: rgba(255,255,255,.8);
  border-radius: var(--radius);
  padding: 44px 40px;
  position: relative;
  overflow: hidden;
}
.contact-info-card::after {
  content: "";
  position: absolute; right: -50px; bottom: -50px;
  width: 200px; height: 200px;
  border-radius: 50%;
  border: 30px solid rgba(216,164,55,.14);
}
.contact-info-card h3 { color: #fff; margin-bottom: 8px; font-size: 22px; }
.contact-info-card > p { font-size: 14px; color: rgba(255,255,255,.6); margin-bottom: 28px; }
.ci-item { display: flex; gap: 16px; padding: 16px 0; border-bottom: 1px solid rgba(255,255,255,.1); position: relative; z-index: 2; }
.ci-item:last-of-type { border-bottom: none; }
.ci-item .ci-icon {
  flex: none; width: 42px; height: 42px;
  border-radius: 12px;
  background: rgba(255,255,255,.08);
  display: grid; place-items: center;
  color: var(--wheat);
}
.ci-item b { display: block; color: #fff; font-size: 14px; font-weight: 600; margin-bottom: 2px; }
.ci-item span { font-size: 14px; }
.contact-form-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 44px 40px;
  box-shadow: var(--shadow);
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-field { display: flex; flex-direction: column; gap: 6px; }
.form-field.full { grid-column: 1 / -1; }
.form-field label { font-size: 13.5px; font-weight: 600; color: var(--green-900); }
.form-field input, .form-field select, .form-field textarea {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 14px;
  font-family: inherit;
  color: var(--ink);
  background: var(--paper);
  outline: none;
  transition: border .2s;
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus { border-color: var(--green-600); }
.form-field textarea { resize: vertical; min-height: 120px; }
.form-note { grid-column: 1 / -1; font-size: 12.5px; color: var(--ink-soft); }
.form-success {
  grid-column: 1 / -1;
  background: rgba(42,122,79,.1);
  border: 1px solid rgba(42,122,79,.35);
  color: var(--green-700);
  border-radius: 10px;
  padding: 14px 16px;
  font-size: 14px;
  display: none;
}
.form-success.show { display: block; }

/* ---------- 动效 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .1s; }
.reveal.d2 { transition-delay: .2s; }
.reveal.d3 { transition-delay: .3s; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3) { border-left: none; }
  .stat:nth-child(n+3) { border-top: 1px solid var(--line); }
  .chain-grid { grid-template-columns: repeat(3, 1fr); }
  .cats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-main { grid-template-columns: 1fr 1fr; }
  .split, .trace-grid, .cat-block, .contact-layout { gap: 40px; }
}
@media (max-width: 860px) {
  .main-nav {
    position: fixed;
    top: 72px; left: 0; right: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-lg);
    max-height: 0;
    overflow: hidden;
    transition: max-height .35s ease;
  }
  .main-nav.open { max-height: 420px; }
  .main-nav ul { flex-direction: column; gap: 0; padding: 12px 5%; }
  .main-nav a { padding: 13px 10px; border-bottom: 1px solid var(--paper); }
  .main-nav a.active::after { display: none; }
  .header-cta { display: none; }
  .nav-toggle { display: block; }
  .split, .trace-grid, .contact-layout { grid-template-columns: 1fr; }
  .split-media img, .trace-visual img { height: 340px; }
  .cat-block { grid-template-columns: 1fr; }
  .cat-block.reverse .cb-media { order: 0; }
  .cards-3, .news-grid, .values-grid { grid-template-columns: 1fr; }
  .cta-band { flex-direction: column; text-align: center; padding: 48px 28px; }
  .section { padding: 68px 0; }
  .media-badge { left: 12px; }
  .trace-float { right: 10px; }
  .form-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .chain-grid { grid-template-columns: 1fr 1fr; }
  .cats-grid { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: 1fr; gap: 32px; }
  .hero-inner { padding: 120px 0 100px; }
  .contact-form-card, .contact-info-card { padding: 32px 24px; }
}