/* =========================================================
   深圳市恒旺工业材料有限公司 · 企业官网
   工业质感 · 大气厚重 · 深墨蓝 + 工业橙
   css/style.css
   ========================================================= */

:root {
  --navy: #1c2b3a;
  --navy-2: #24384c;
  --navy-3: #16222e;
  --navy-4: #0f1a24;
  --orange: #e87722;
  --orange-2: #d96a1a;
  --orange-soft: #fdf0e4;
  --bg: #f5f6f7;
  --card: #ffffff;
  --text: #2a2f35;
  --muted: #6b7280;
  --line: #e3e6e9;
  --line-dark: rgba(255, 255, 255, 0.14);
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 10px 30px rgba(28, 43, 58, 0.08);
  --shadow-lg: 0 22px 50px rgba(28, 43, 58, 0.16);
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
}

* { 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: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

ul { list-style: none; }

.container { width: min(1200px, 92%); margin: 0 auto; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.25s ease;
  white-space: nowrap;
}
.btn-primary { background: var(--orange); color: #fff; }
.btn-primary:hover { background: var(--orange-2); transform: translateY(-2px); box-shadow: 0 12px 26px rgba(232, 119, 34, 0.35); }
.btn-ghost-light { border-color: rgba(255, 255, 255, 0.4); color: #fff; background: transparent; }
.btn-ghost-light:hover { border-color: var(--orange); background: var(--orange); transform: translateY(-2px); }
.btn-ghost-dark { border-color: var(--navy); color: var(--navy); background: transparent; }
.btn-ghost-dark:hover { background: var(--navy); color: #fff; }
.btn-sm { padding: 9px 20px; font-size: 13px; }

/* ---------- 顶栏 ---------- */
.topbar {
  background: var(--navy-3);
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
}
.topbar .container { display: flex; justify-content: space-between; align-items: center; min-height: 40px; }
.topbar-links { display: flex; align-items: center; gap: 22px; }
.topbar-links a { display: inline-flex; align-items: center; gap: 6px; transition: color 0.2s; }
.topbar-links a:hover { color: var(--orange); }
.topbar-shops { display: flex; gap: 14px; }
.topbar-shops a { color: rgba(255, 255, 255, 0.9); font-weight: 600; padding: 3px 12px; border: 1px solid rgba(255,255,255,0.22); border-radius: 999px; font-size: 12px; transition: all 0.2s; }
.topbar-shops a:hover { border-color: var(--orange); color: var(--orange); }

/* ---------- 主导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--navy);
  box-shadow: 0 4px 18px rgba(15, 26, 36, 0.25);
}
.site-header .container { display: flex; align-items: center; gap: 34px; min-height: 76px; }

.logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.logo-mark {
  width: 46px; height: 46px; border-radius: 10px;
  background: linear-gradient(135deg, var(--orange), var(--orange-2));
  color: #fff; font-weight: 800; font-size: 20px;
  display: flex; align-items: center; justify-content: center;
  letter-spacing: -1px;
  box-shadow: 0 6px 16px rgba(232, 119, 34, 0.35);
}
.logo-text { color: #fff; line-height: 1.25; }
.logo-text strong { font-size: 19px; letter-spacing: 1px; display: block; }
.logo-text span { font-size: 11px; color: rgba(255, 255, 255, 0.55); letter-spacing: 2px; text-transform: uppercase; }

.main-nav { display: flex; align-items: center; gap: 6px; margin-left: auto; }
.main-nav > li { position: relative; }
.main-nav > li > a {
  display: flex; align-items: center; gap: 5px;
  padding: 10px 16px;
  color: rgba(255, 255, 255, 0.86);
  font-size: 15px; font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}
.main-nav > li > a:hover, .main-nav > li.active > a { color: var(--orange); background: rgba(232, 119, 34, 0.1); }
.main-nav .caret { font-size: 10px; opacity: 0.7; transition: transform 0.2s; }
.main-nav > li:hover .caret { transform: rotate(180deg); }

.dropdown {
  position: absolute; top: 100%; left: 0;
  min-width: 210px; background: #fff; border-radius: 12px;
  box-shadow: var(--shadow-lg);
  padding: 10px;
  opacity: 0; visibility: hidden; transform: translateY(12px);
  transition: all 0.22s ease;
  z-index: 50;
}
.main-nav > li:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(6px); }
.dropdown a {
  display: block; padding: 10px 14px; border-radius: 8px;
  color: var(--text); font-size: 14px; font-weight: 500;
  transition: all 0.15s;
}
.dropdown a:hover { background: var(--orange-soft); color: var(--orange-2); padding-left: 18px; }

.header-cta { margin-left: 10px; }

.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; margin-left: auto; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: #fff; margin: 5px 0; border-radius: 2px; transition: all 0.25s; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background:
    radial-gradient(900px 420px at 82% 8%, rgba(232, 119, 34, 0.14), transparent 60%),
    linear-gradient(160deg, var(--navy) 0%, var(--navy-3) 72%, var(--navy-4) 100%);
  color: #fff;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(232, 119, 34, 0.55), transparent);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 40px;
  align-items: center;
  padding: 88px 0 96px;
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--orange); font-size: 13px; font-weight: 700; letter-spacing: 3px;
  margin-bottom: 22px;
}
.hero-eyebrow::before { content: ""; width: 34px; height: 2px; background: var(--orange); }
.hero-title {
  font-size: clamp(2.3rem, 4.6vw, 3.7rem);
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: 1px;
}
.hero-title em { font-style: normal; color: var(--orange); }
.hero-sub { margin-top: 22px; color: rgba(255, 255, 255, 0.72); font-size: 16.5px; max-width: 520px; }
.hero-actions { display: flex; gap: 16px; margin-top: 36px; flex-wrap: wrap; }
.hero-trust { display: flex; gap: 26px; margin-top: 42px; flex-wrap: wrap; }
.hero-trust li { display: flex; align-items: center; gap: 8px; font-size: 13px; color: rgba(255, 255, 255, 0.6); }
.hero-trust li::before { content: "✓"; color: var(--orange); font-weight: 800; }

/* hero 视觉：抛光轮图形 */
.hero-visual { position: relative; display: flex; justify-content: center; }
.wheel-wrap { position: relative; width: min(430px, 100%); }
.wheel-wrap .glow {
  position: absolute; inset: -6%;
  background: radial-gradient(circle, rgba(232, 119, 34, 0.22), transparent 65%);
  border-radius: 50%;
  filter: blur(6px);
}
.hero-chip {
  position: absolute;
  display: flex; align-items: center; gap: 10px;
  background: rgba(255, 255, 255, 0.97);
  color: var(--navy);
  border-radius: 999px;
  padding: 9px 16px 9px 10px;
  font-size: 13px; font-weight: 700;
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.35);
  white-space: nowrap;
}
.hero-chip .chip-ico {
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--orange-soft); color: var(--orange-2);
  display: flex; align-items: center; justify-content: center;
  font-size: 15px;
}
.hero-chip.c1 { top: 6%; left: -4%; }
.hero-chip.c2 { top: 40%; right: -8%; }
.hero-chip.c3 { bottom: 10%; left: -10%; }
.hero-chip.c4 { bottom: -4%; right: 4%; }

/* ---------- 数据条 ---------- */
.stats-strip { background: var(--navy-3); border-top: 1px solid var(--line-dark); }
.stats-strip .container { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: 30px 18px; text-align: center; border-left: 1px solid var(--line-dark); }
.stat:first-child { border-left: none; }
.stat b { display: block; font-size: clamp(1.7rem, 3vw, 2.4rem); font-weight: 800; color: #fff; }
.stat b i { font-style: normal; color: var(--orange); font-size: 0.62em; font-weight: 700; margin-left: 2px; }
.stat span { font-size: 13px; color: rgba(255, 255, 255, 0.55); letter-spacing: 2px; }

/* ---------- 区块通用 ---------- */
.section { padding: 92px 0; }
.section.alt { background: #fff; }
.section-head { max-width: 720px; margin-bottom: 52px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head .kicker {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--orange); font-size: 13px; font-weight: 700; letter-spacing: 3px;
  margin-bottom: 14px;
}
.section-head .kicker::before { content: ""; width: 24px; height: 2px; background: var(--orange); }
.section-head.center .kicker::after { content: ""; width: 24px; height: 2px; background: var(--orange); }
.section-head h2 { font-size: clamp(1.7rem, 3vw, 2.35rem); color: var(--navy); font-weight: 800; letter-spacing: 1px; }
.section-head p { margin-top: 14px; color: var(--muted); font-size: 15.5px; }

/* ---------- 公司简介摘要 ---------- */
.intro-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 60px; align-items: center; }
.intro-text h3 { font-size: 22px; color: var(--navy); margin: 20px 0 14px; }
.intro-text p { color: var(--muted); font-size: 15.5px; margin-bottom: 14px; }
.intro-text .fact-list { margin: 20px 0 28px; display: grid; gap: 10px; }
.intro-text .fact-list li { display: flex; gap: 10px; align-items: baseline; font-size: 14.5px; color: var(--text); }
.intro-text .fact-list li::before { content: "▸"; color: var(--orange); font-weight: 800; }
.intro-panel {
  background: var(--navy);
  border-radius: var(--radius);
  padding: 38px 34px;
  color: #fff;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}
.intro-panel::before {
  content: ""; position: absolute; right: -70px; top: -70px;
  width: 220px; height: 220px; border-radius: 50%;
  background: radial-gradient(circle, rgba(232, 119, 34, 0.35), transparent 70%);
}
.intro-panel h4 { font-size: 17px; letter-spacing: 2px; margin-bottom: 22px; display: flex; align-items: center; gap: 10px; }
.intro-panel h4::before { content: ""; width: 26px; height: 2px; background: var(--orange); }
.intro-panel ul { display: grid; gap: 14px; position: relative; }
.intro-panel ul li { display: flex; gap: 12px; align-items: flex-start; }
.intro-panel .yr {
  flex-shrink: 0; width: 58px; text-align: center;
  background: rgba(232, 119, 34, 0.16); color: var(--orange);
  font-weight: 800; font-size: 13px; padding: 5px 0; border-radius: 6px;
}
.intro-panel ul li p { font-size: 13.5px; color: rgba(255, 255, 255, 0.78); }
.intro-panel ul li p b { color: #fff; display: block; font-size: 14.5px; margin-bottom: 2px; }

/* ---------- 产品系列 ---------- */
.series-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.series-card {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  padding: 34px 28px;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
  display: flex; flex-direction: column;
}
.series-card::after {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  background: var(--orange); transform: scaleY(0); transform-origin: top;
  transition: transform 0.3s ease;
}
.series-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.series-card:hover::after { transform: scaleY(1); }
.series-card .series-ico {
  width: 64px; height: 64px; border-radius: 16px;
  background: var(--orange-soft);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
}
.series-card h3 { font-size: 19px; color: var(--navy); margin-bottom: 10px; }
.series-card > p { font-size: 14px; color: var(--muted); flex-grow: 1; }
.series-card .series-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 20px; }
.series-card .series-tags span {
  font-size: 12px; color: var(--navy-2);
  background: var(--bg); border: 1px solid var(--line);
  padding: 3px 10px; border-radius: 999px;
}
.series-card .more-link { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 700; color: var(--orange-2); }
.series-card .more-link::after { content: "→"; transition: transform 0.2s; }
.series-card:hover .more-link::after { transform: translateX(4px); }

/* ---------- 应用领域 ---------- */
.app-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.app-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 22px 20px;
  display: flex; gap: 16px; align-items: flex-start;
  transition: all 0.25s ease;
  position: relative;
}
.app-card:hover { border-color: var(--orange); box-shadow: var(--shadow); transform: translateY(-3px); }
.app-card .num {
  font-size: 26px; font-weight: 800; color: transparent;
  -webkit-text-stroke: 1.4px rgba(232, 119, 34, 0.55);
  line-height: 1; flex-shrink: 0;
}
.app-card h3 { font-size: 15.5px; color: var(--navy); }
.app-card p { font-size: 12.5px; color: var(--muted); margin-top: 4px; }

/* ---------- 服务优势 ---------- */
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.adv-card { background: var(--navy); border-radius: var(--radius); padding: 34px 26px; color: #fff; position: relative; overflow: hidden; transition: all 0.3s ease; }
.adv-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.adv-card::before {
  content: ""; position: absolute; right: -40px; bottom: -40px;
  width: 140px; height: 140px; border-radius: 50%;
  border: 22px solid rgba(232, 119, 34, 0.12);
}
.adv-card .adv-ico {
  width: 52px; height: 52px; border-radius: 12px;
  background: rgba(232, 119, 34, 0.18); color: var(--orange);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.adv-card h3 { font-size: 17px; margin-bottom: 8px; }
.adv-card p { font-size: 13.5px; color: rgba(255, 255, 255, 0.65); }

/* ---------- CTA ---------- */
.cta-band {
  background:
    radial-gradient(700px 320px at 18% 20%, rgba(232, 119, 34, 0.16), transparent 60%),
    var(--navy-3);
  padding: 74px 0;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.cta-band .container { display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.cta-band h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); font-weight: 800; letter-spacing: 1px; }
.cta-band p { color: rgba(255, 255, 255, 0.65); margin-top: 10px; font-size: 15px; }
.cta-actions { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.cta-phone { font-size: 22px; font-weight: 800; color: var(--orange); display: flex; align-items: center; gap: 10px; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--navy-4); color: rgba(255, 255, 255, 0.6); font-size: 13.5px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding: 60px 0 44px; }
.footer-grid h4 { color: #fff; font-size: 15px; letter-spacing: 1px; margin-bottom: 18px; }
.footer-grid h4::after { content: ""; display: block; width: 26px; height: 2px; background: var(--orange); margin-top: 10px; }
.footer-about p { margin-top: 14px; line-height: 1.8; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { transition: all 0.2s; display: inline-flex; align-items: center; gap: 6px; }
.footer-links a::before { content: "›"; color: var(--orange); }
.footer-links a:hover { color: var(--orange); padding-left: 4px; }
.footer-contact li { display: flex; gap: 10px; margin-bottom: 14px; align-items: flex-start; }
.footer-contact .fc-ico { color: var(--orange); flex-shrink: 0; margin-top: 2px; }
.footer-bottom { border-top: 1px solid var(--line-dark); padding: 20px 0; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.footer-bottom a:hover { color: var(--orange); }

/* ---------- 页内横幅（内页共用） ---------- */
.page-hero {
  background: linear-gradient(160deg, var(--navy), var(--navy-3));
  color: #fff; padding: 66px 0 60px;
  position: relative; overflow: hidden;
}
.page-hero::after {
  content: ""; position: absolute; right: -120px; top: -120px;
  width: 340px; height: 340px; border-radius: 50%;
  background: radial-gradient(circle, rgba(232, 119, 34, 0.22), transparent 70%);
}
.page-hero .crumb { font-size: 13px; color: rgba(255, 255, 255, 0.55); letter-spacing: 1px; margin-bottom: 14px; }
.page-hero .crumb a:hover { color: var(--orange); }
.page-hero h1 { font-size: clamp(1.9rem, 3.6vw, 2.8rem); font-weight: 800; letter-spacing: 1px; }
.page-hero p { margin-top: 12px; color: rgba(255, 255, 255, 0.7); max-width: 640px; font-size: 15px; }

/* ---------- 产品详情页 ---------- */
.prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.prod-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: all 0.3s ease;
}
.prod-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: transparent; }
.prod-card .prod-visual { background: linear-gradient(145deg, #eef1f4, #e3e8ed); padding: 30px; display: flex; justify-content: center; }
.prod-card .prod-body { padding: 24px; }
.prod-card .prod-tag { display: inline-block; font-size: 11.5px; font-weight: 700; color: var(--orange-2); background: var(--orange-soft); padding: 3px 10px; border-radius: 999px; margin-bottom: 10px; letter-spacing: 1px; }
.prod-card h3 { font-size: 17px; color: var(--navy); }
.prod-card .prod-desc { font-size: 13.5px; color: var(--muted); margin-top: 8px; }
.prod-card .prod-uses { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 6px; }
.prod-card .prod-uses span { font-size: 11.5px; color: var(--navy-2); border: 1px solid var(--line); background: var(--bg); padding: 2px 9px; border-radius: 999px; }

/* ---------- 联系方式 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 40px; align-items: start; }
.contact-cards { display: grid; gap: 16px; }
.contact-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; display: flex; gap: 18px; align-items: flex-start; transition: all 0.25s; }
.contact-card:hover { border-color: var(--orange); box-shadow: var(--shadow); }
.contact-card .cc-ico { width: 48px; height: 48px; border-radius: 12px; background: var(--orange-soft); color: var(--orange-2); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.contact-card h3 { font-size: 15px; color: var(--navy); }
.contact-card p { font-size: 14px; color: var(--muted); margin-top: 4px; }
.contact-card p b { color: var(--text); font-size: 16px; }
.inquiry-form { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 34px; }
.inquiry-form h3 { font-size: 18px; color: var(--navy); margin-bottom: 6px; }
.inquiry-form > p { font-size: 13.5px; color: var(--muted); margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; color: var(--navy); margin-bottom: 7px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--radius-sm);
  font-size: 14.5px; font-family: inherit; color: var(--text); background: var(--bg);
  transition: all 0.2s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--orange); background: #fff; box-shadow: 0 0 0 3px rgba(232, 119, 34, 0.14);
}
.form-group textarea { resize: vertical; min-height: 110px; }
.form-msg { display: none; margin-top: 14px; padding: 12px 16px; border-radius: var(--radius-sm); font-size: 14px; }
.form-msg.ok { display: block; background: #e9f8ef; color: #1e7a45; border: 1px solid #bfe8d0; }
.form-msg.err { display: block; background: #fdecec; color: #b33a3a; border: 1px solid #f3c4c4; }

/* ---------- 页面主体通用 ---------- */
.page-main { padding: 70px 0; }
.prose h2 { font-size: 22px; color: var(--navy); margin: 34px 0 16px; }
.prose h3 { font-size: 17px; color: var(--navy); margin: 26px 0 12px; }
.prose p { color: var(--muted); margin-bottom: 14px; font-size: 15px; }
.timeline { display: grid; gap: 0; margin-top: 30px; }
.timeline-item { display: flex; gap: 24px; padding-bottom: 28px; position: relative; }
.timeline-item::before { content: ""; position: absolute; left: 27px; top: 54px; bottom: 0; width: 2px; background: var(--line); }
.timeline-item:last-child::before { display: none; }
.timeline-item .tl-year { flex-shrink: 0; width: 56px; height: 56px; border-radius: 50%; background: var(--navy); color: var(--orange); font-weight: 800; font-size: 13px; display: flex; align-items: center; justify-content: center; text-align: center; box-shadow: var(--shadow); }
.timeline-item .tl-body h3 { font-size: 16.5px; color: var(--navy); margin-bottom: 4px; }
.timeline-item .tl-body p { font-size: 14px; color: var(--muted); }

.badge-list { display: flex; flex-wrap: wrap; gap: 12px; }
.badge-list li { background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 9px 20px; font-size: 14px; color: var(--navy-2); font-weight: 500; }
.badge-list li b { color: var(--orange-2); }

/* ---------- 动效 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; padding: 60px 0 70px; text-align: left; }
  .hero-visual { order: -1; margin-bottom: 10px; }
  .wheel-wrap { width: min(300px, 80%); }
  .series-grid, .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .app-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .intro-grid, .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .main-nav {
    position: fixed; top: 0; right: 0; bottom: 0;
    width: min(320px, 84vw);
    background: var(--navy-2);
    flex-direction: column; align-items: flex-start;
    padding: 90px 30px 40px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 200;
    gap: 4px;
    box-shadow: -20px 0 50px rgba(0, 0, 0, 0.3);
  }
  .main-nav.open { transform: translateX(0); }
  .main-nav > li { width: 100%; }
  .main-nav > li > a { width: 100%; padding: 13px 12px; font-size: 16px; }
  .dropdown { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; background: transparent; padding: 0 0 6px 14px; display: none; min-width: 0; }
  .main-nav > li.open-dd .dropdown { display: block; }
  .dropdown a { color: rgba(255, 255, 255, 0.85); padding: 9px 12px; }
  .dropdown a:hover { background: rgba(232, 119, 34, 0.14); color: var(--orange); padding-left: 12px; }
  .header-cta { display: none; }
  .mobile-scrim { position: fixed; inset: 0; background: rgba(10, 18, 26, 0.55); z-index: 150; opacity: 0; visibility: hidden; transition: all 0.3s; }
  .mobile-scrim.show { opacity: 1; visibility: visible; }
}

@media (max-width: 640px) {
  .section { padding: 60px 0; }
  .stats-strip .container { grid-template-columns: repeat(2, 1fr); }
  .stat { border-top: 1px solid var(--line-dark); }
  .stat:nth-child(-n+2) { border-top: none; }
  .stat:nth-child(even) { border-left: none; }
  .series-grid, .adv-grid, .prod-grid { grid-template-columns: 1fr; }
  .app-grid { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .hero-chip { display: none; }
  .topbar-shops { display: none; }
  .cta-band .container { justify-content: center; text-align: center; }
}