/* ============================================================
   HLXSOFT 好理想软件 官网样式
   风格参考：Odoo（低饱和紫罗兰主色 + 青绿辅助 + 卡片化栅格 + 渐变 + 滚动动效）
   ============================================================ */

/* ---------- 基础变量 ---------- */
:root {
  --primary: #714B67;        /* Odoo 紫罗兰 */
  --primary-dark: #5C3A54;
  --primary-light: #8A6B86;
  --accent: #017E84;         /* 青绿辅助色 */
  --accent-light: #2BB3A6;
  --ink: #1F2430;
  --ink-soft: #4A5060;
  --muted: #6E7485;
  --bg: #FFFFFF;
  --bg-soft: #F7F6FA;
  --bg-dark: #17141C;
  --line: #E8E6EF;
  --grad-main: linear-gradient(135deg, #714B67 0%, #8A4A8F 55%, #017E84 130%);
  --grad-soft: linear-gradient(135deg, rgba(113,75,103,.08) 0%, rgba(1,126,132,.08) 100%);
  --grad-hero: radial-gradient(1200px 600px at 85% -10%, rgba(43,179,166,.28) 0%, transparent 60%),
               radial-gradient(900px 520px at 10% 110%, rgba(113,75,103,.30) 0%, transparent 55%),
               linear-gradient(160deg, #221A2A 0%, #2E2244 55%, #163A44 100%);
  --radius: 18px;
  --radius-sm: 12px;
  --shadow-sm: 0 2px 8px rgba(31,36,48,.06);
  --shadow-md: 0 10px 30px rgba(31,36,48,.10);
  --shadow-lg: 0 24px 60px rgba(31,36,48,.16);
  --font: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
}

/* ---------- Reset ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
.container { width: min(1180px, 92%); margin: 0 auto; }
section { padding: 88px 0; }

/* ---------- 通用标题 ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; letter-spacing: .12em;
  color: var(--accent); text-transform: uppercase; margin-bottom: 14px;
}
.eyebrow::before { content: ''; width: 22px; height: 2px; background: var(--accent); border-radius: 2px; }
.section-title { font-size: clamp(26px, 3.6vw, 40px); font-weight: 700; letter-spacing: -.02em; line-height: 1.2; }
.section-sub { color: var(--muted); font-size: 16px; margin-top: 12px; max-width: 640px; }
.center { text-align: center; }
.center .section-sub { margin-left: auto; margin-right: auto; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 26px; border-radius: 999px; font-weight: 600; font-size: 15px;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
  border: none; cursor: pointer; font-family: inherit;
}
.btn-primary {
  color: #fff; background: var(--grad-main);
  box-shadow: 0 10px 24px rgba(113,75,103,.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 32px rgba(113,75,103,.42); }
.btn-ghost { color: #fff; background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.35); backdrop-filter: blur(4px); }
.btn-ghost:hover { background: rgba(255,255,255,.22); transform: translateY(-2px); }
.btn-light { color: var(--primary-dark); background: #fff; box-shadow: var(--shadow-md); }
.btn-light:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-line { color: var(--primary); background: transparent; border: 1.5px solid var(--primary-light); }
.btn-line:hover { background: var(--grad-soft); }

/* ---------- 导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.86); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; color: var(--primary-dark); }
.brand-mark {
  width: 36px; height: 36px; border-radius: 10px; background: var(--grad-main);
  color: #fff; display: grid; place-items: center; font-size: 15px; font-weight: 800;
  box-shadow: 0 6px 16px rgba(113,75,103,.35);
}
.brand-logo {
  width: 44px; height: 44px; object-fit: contain; flex-shrink: 0; /* 圆角由图片自带，不再额外处理 */
  box-shadow: 0 6px 16px rgba(113,75,103,.30);
}
.footer .brand-logo {
  width: 40px; height: 40px;
  box-shadow: 0 6px 16px rgba(0,0,0,.35);
}
.brand small { display: block; font-size: 10px; font-weight: 600; letter-spacing: .18em; color: var(--muted); }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a { font-size: 15px; font-weight: 500; color: var(--ink-soft); transition: color .2s; position: relative; }
.nav-links a:hover, .nav-links a.active { color: var(--primary); }
.nav-links a.active::after { content: ''; position: absolute; left: 0; right: 0; bottom: -26px; height: 2px; background: var(--grad-main); border-radius: 2px; }
.nav-cta { padding: 10px 20px; }
.nav-toggle { display: none; background: none; border: none; font-size: 22px; cursor: pointer; color: var(--ink); }

/* ---------- Hero ---------- */
.hero {
  background: var(--grad-hero); color: #fff; overflow: hidden;
  padding: 120px 0 140px; position: relative;
}
.hero::after {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(rgba(255,255,255,.07) 1px, transparent 1px);
  background-size: 26px 26px; mask-image: linear-gradient(180deg, #000 0%, transparent 90%);
}
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; position: relative; z-index: 2; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; padding: 8px 16px;
  border-radius: 999px; background: rgba(255,255,255,.10); border: 1px solid rgba(255,255,255,.22);
  font-size: 13px; font-weight: 600; letter-spacing: .06em; margin-bottom: 22px;
}
.hero h1 { font-size: clamp(34px, 5.2vw, 58px); font-weight: 800; line-height: 1.12; letter-spacing: -.025em; }
.hero h1 .grad-text { background: linear-gradient(90deg, #C99BC4 0%, #5EE0D2 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p { margin: 22px 0 34px; font-size: 17px; color: rgba(255,255,255,.82); max-width: 520px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 40px; margin-top: 48px; }
.hero-stats div { border-left: 2px solid rgba(255,255,255,.25); padding-left: 16px; }
.hero-stats b { font-size: 26px; font-weight: 800; display: block; }
.hero-stats span { font-size: 13px; color: rgba(255,255,255,.68); }

/* Hero 右侧视觉（模块化卡片墙） */
.hero-visual { position: relative; }
.hero-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.hero-card {
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.16);
  border-radius: var(--radius); padding: 20px; backdrop-filter: blur(8px);
  transition: transform .3s ease, background .3s ease;
}
.hero-card:hover { transform: translateY(-4px); background: rgba(255,255,255,.14); }
.hero-card i { display: block; width: 38px; height: 38px; border-radius: 10px; background: rgba(255,255,255,.16); display: grid; place-items: center; font-style: normal; margin-bottom: 12px; font-weight: 700; color: #5EE0D2; }
.hero-card h4 { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.hero-card span { font-size: 12.5px; color: rgba(255,255,255,.70); }
.hero-float {
  position: absolute; right: -16px; top: -36px; z-index: 20;
  background: #fff; color: var(--ink); border-radius: 14px; padding: 12px 18px;
  box-shadow: var(--shadow-lg); font-size: 13px; font-weight: 600;
  display: flex; align-items: center; gap: 8px;
}
.hero-float::before { content: ''; width: 8px; height: 8px; border-radius: 50%; background: var(--accent-light); box-shadow: 0 0 0 4px rgba(43,179,166,.2); }

/* ---------- 模块（通用） ---------- */
.module-head { margin-bottom: 48px; }
.grid { display: grid; gap: 24px; }

/* 产品矩阵 */
.products-grid { grid-template-columns: repeat(4, 1fr); }
.product-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 22px; transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
  display: flex; flex-direction: column;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.p-icon {
  width: 52px; height: 52px; border-radius: 14px; margin-bottom: 16px;
  background: var(--grad-soft); border: 1px solid rgba(113,75,103,.14);
  display: grid; place-items: center; color: var(--primary); font-weight: 800; font-size: 17px;
  transition: background .3s ease, color .3s ease;
}
.product-card:hover .p-icon { background: var(--grad-main); color: #fff; }
.product-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
.product-card .p-tag { font-size: 12.5px; color: var(--muted); margin-bottom: 10px; }
.product-card .p-desc { font-size: 14px; color: var(--ink-soft); flex: 1; }
.product-card .p-link { margin-top: 16px; font-size: 14px; font-weight: 600; color: var(--accent); display: inline-flex; align-items: center; gap: 6px; }
.product-card .p-link::after { content: '→'; transition: transform .25s ease; }
.product-card:hover .p-link::after { transform: translateX(4px); }

/* 硬件展示（12 项智能装备 · 4 组归类） */
.hardware-grid { display: grid; gap: 20px; }
.hw-groups { display: grid; gap: 44px; }
.hw-group-title {
  display: flex; align-items: center; gap: 10px; font-size: 17px; font-weight: 800;
  color: var(--primary-dark); margin-bottom: 20px;
}
.hw-group-title::before { content: ''; width: 4px; height: 18px; border-radius: 2px; background: var(--grad-main); }
.hw-group-title small { font-size: 12.5px; font-weight: 600; color: var(--muted); }
.hardware-grid.hw-1 { grid-template-columns: minmax(0, 460px); }
.hardware-grid.hw-2 { grid-template-columns: repeat(2, 1fr); }
.hardware-grid.hw-3 { grid-template-columns: repeat(3, 1fr); }
.hardware-grid.hw-4 { grid-template-columns: repeat(4, 1fr); }
.hardware-grid.hw-5 { grid-template-columns: repeat(5, 1fr); }
.hardware-card {
  background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: transform .3s ease, box-shadow .3s ease;
}
.hardware-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.hw-img { height: 150px; position: relative; display: grid; place-items: center; }
.hw-img i { font-style: normal; font-size: 44px; font-weight: 300; opacity: .9; }
.hw-body { padding: 18px; }
.hw-body h4 { font-size: 15px; font-weight: 700; }
.hw-body span { font-size: 12.5px; color: var(--muted); }

/* 视频展示 */
.video-wrap { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.video-card { border-radius: var(--radius); overflow: hidden; position: relative; aspect-ratio: 16/9; background: var(--bg-dark); box-shadow: var(--shadow-md); }
.video-cover { position: absolute; inset: 0; display: grid; place-items: center; }
.video-cover video, .video-cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.video-cover img { opacity: .65; }
.video-meta { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: flex-end; padding: 40px 22px 22px; color: #fff; background: linear-gradient(180deg, transparent 40%, rgba(0,0,0,.72) 100%); pointer-events: none; }
.video-meta h4 { font-size: 17px; font-weight: 700; }
.video-meta span { font-size: 13px; color: rgba(255,255,255,.8); }
.video-brand {
  position: absolute; top: 14px; left: 14px; z-index: 5;
  background: rgba(0,0,0,.48); color: #fff; font-size: 13px; font-weight: 700;
  letter-spacing: .06em; padding: 6px 12px; border-radius: 8px;
  display: flex; align-items: center; gap: 7px; pointer-events: none;
  backdrop-filter: blur(3px); box-shadow: 0 4px 14px rgba(0,0,0,.25);
}
.video-brand::before { content: '●'; color: #5EE0D2; font-size: 10px; }
.play-btn {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 66px; height: 66px; border-radius: 50%; border: none; cursor: pointer;
  background: rgba(255,255,255,.92); color: var(--primary); font-size: 22px;
  display: grid; place-items: center; transition: transform .25s ease, background .25s ease;
  box-shadow: 0 12px 30px rgba(0,0,0,.35); z-index: 3;
}
.play-btn:hover { transform: translate(-50%, -50%) scale(1.1); background: #fff; }
.video-cover.playing .play-btn { display: none; }
.video-cover.playing::after { display: none; }

/* 数据亮点 */
.stats-band { background: var(--grad-main); border-radius: calc(var(--radius) + 8px); color: #fff; padding: 56px 40px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; text-align: center; }
.stat-item b { font-size: clamp(30px, 4vw, 44px); font-weight: 800; letter-spacing: -.02em; display: block; }
.stat-item span { font-size: 14px; opacity: .85; }

/* 价值区块（首页） */
.value-grid { grid-template-columns: repeat(3, 1fr); }
.value-card { background: var(--bg-soft); border-radius: var(--radius); padding: 30px 26px; border: 1px solid var(--line); transition: transform .3s ease, box-shadow .3s ease; }
.value-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.value-card i { font-style: normal; font-size: 30px; font-weight: 800; color: var(--accent); }
.value-card h3 { font-size: 18px; font-weight: 700; margin: 14px 0 8px; }
.value-card p { font-size: 14.5px; color: var(--muted); }

/* CTA */
.cta-band {
  background: var(--grad-hero); color: #fff; border-radius: calc(var(--radius) + 8px);
  padding: 72px 48px; text-align: center; position: relative; overflow: hidden;
}
.cta-band h2 { font-size: clamp(26px, 3.6vw, 38px); font-weight: 800; letter-spacing: -.02em; }
.cta-band p { margin: 14px auto 30px; max-width: 520px; color: rgba(255,255,255,.82); }

/* ---------- 产品中心页 ---------- */
.page-hero { background: var(--grad-hero); color: #fff; padding: 84px 0 96px; text-align: center; position: relative; overflow: hidden; }
.page-hero::after { content: ''; position: absolute; inset: 0; background-image: radial-gradient(rgba(255,255,255,.07) 1px, transparent 1px); background-size: 26px 26px; }
.page-hero h1 { font-size: clamp(30px, 4.4vw, 46px); font-weight: 800; letter-spacing: -.02em; position: relative; z-index: 2; }
.page-hero p { margin: 14px auto 0; max-width: 600px; color: rgba(255,255,255,.8); position: relative; z-index: 2; }
.page-hero .breadcrumb { position: relative; z-index: 2; margin-bottom: 18px; font-size: 13px; color: rgba(255,255,255,.6); }

/* 产品筛选 */
.filter-bar { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-bottom: 44px; }
.filter-btn { padding: 9px 20px; border-radius: 999px; border: 1px solid var(--line); background: #fff; font-size: 14px; font-weight: 600; color: var(--ink-soft); cursor: pointer; transition: all .25s ease; font-family: inherit; }
.filter-btn:hover { border-color: var(--primary-light); color: var(--primary); }
.filter-btn.active { background: var(--grad-main); color: #fff; border-color: transparent; box-shadow: 0 8px 20px rgba(113,75,103,.3); }

/* 产品详情卡片 */
.product-detail {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 30px;
  display: grid; grid-template-columns: 72px 1fr; gap: 24px;
  background: #fff; transition: transform .3s ease, box-shadow .3s ease;
}
.product-detail:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.pd-icon { width: 72px; height: 72px; border-radius: 18px; background: var(--grad-main); color: #fff; display: grid; place-items: center; font-size: 26px; font-weight: 800; box-shadow: 0 10px 26px rgba(113,75,103,.3); }
.pd-body h3 { font-size: 20px; font-weight: 700; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.pd-tagline { display: inline-block; font-size: 13px; font-weight: 600; color: var(--accent); background: rgba(1,126,132,.08); padding: 4px 12px; border-radius: 999px; }
.pd-body .pd-desc { color: var(--ink-soft); font-size: 15px; margin: 10px 0 16px; }
.pd-features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px 20px; }
.pd-features li { font-size: 14px; color: var(--ink-soft); display: flex; align-items: center; gap: 8px; }
.pd-features li::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--accent-light); flex-shrink: 0; }

/* 分类徽章 */
.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 11px; font-weight: 700; letter-spacing: .04em; }
.badge.mgmt { background: rgba(113,75,103,.10); color: var(--primary); }
.badge.make { background: rgba(1,126,132,.10); color: var(--accent); }
.badge.trade { background: rgba(228,170,0,.14); color: #A77C00; }
.badge.ai { background: linear-gradient(135deg, rgba(113,75,103,.14), rgba(1,126,132,.14)); color: var(--primary-dark); }
.badge.brand { background: rgba(138,74,143,.12); color: #8A4A8F; }
.badge.social { background: rgba(43,179,166,.14); color: #017E84; }
.badge.retail { background: rgba(228,170,0,.14); color: #A77C00; }

/* ---------- 关于我们页 ---------- */
.about-split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.about-art { border-radius: var(--radius); background: var(--grad-main); color: #fff; padding: 44px; min-height: 320px; display: flex; flex-direction: column; justify-content: space-between; position: relative; overflow: hidden; }
.about-art::before { content: ''; position: absolute; width: 220px; height: 220px; border-radius: 50%; background: rgba(255,255,255,.12); top: -60px; right: -60px; }
.about-art::after { content: ''; position: absolute; width: 120px; height: 120px; border-radius: 50%; background: rgba(255,255,255,.10); bottom: -30px; left: 30%; }
.about-art b { font-size: 40px; font-weight: 800; position: relative; z-index: 2; }
.about-art p { font-size: 15px; opacity: .85; position: relative; z-index: 2; }
.about-art small { font-size: 12px; opacity: .6; letter-spacing: .2em; position: relative; z-index: 2; }

.milestone { display: flex; gap: 18px; padding: 22px 0; border-bottom: 1px dashed var(--line); }
.milestone:last-child { border-bottom: none; }
.milestone b { color: var(--accent); font-size: 15px; font-weight: 800; min-width: 90px; }
.milestone h4 { font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.milestone p { font-size: 14px; color: var(--muted); }

.philosophy-grid { grid-template-columns: repeat(4, 1fr); }
.phil-card { text-align: center; padding: 34px 20px; background: var(--bg-soft); border-radius: var(--radius); border: 1px solid var(--line); transition: transform .3s ease, box-shadow .3s ease; }
.phil-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.phil-card i { font-style: normal; font-size: 32px; font-weight: 800; color: var(--primary); }
.phil-card h4 { font-size: 16px; font-weight: 700; margin: 12px 0 6px; }
.phil-card p { font-size: 13.5px; color: var(--muted); }

/* ---------- 联系我们页 ---------- */
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 56px; align-items: start; }
.contact-info-card { background: var(--grad-hero); color: #fff; border-radius: var(--radius); padding: 38px; }
.contact-info-card h3 { font-size: 22px; font-weight: 800; margin-bottom: 24px; }
.contact-row { display: flex; gap: 14px; padding: 14px 0; border-bottom: 1px solid rgba(255,255,255,.15); }
.contact-row:last-child { border: none; }
.contact-row i { font-style: normal; font-weight: 800; color: #5EE0D2; min-width: 42px; }
.contact-row b { display: block; font-size: 14px; }
.contact-row span { font-size: 13px; opacity: .8; }
.form-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 38px; box-shadow: var(--shadow-sm); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { display: flex; flex-direction: column; gap: 7px; }
.form-group.full { grid-column: 1 / -1; }
.form-group label { font-size: 13px; font-weight: 600; color: var(--ink-soft); }
.form-group input, .form-group select, .form-group textarea {
  border: 1.5px solid var(--line); border-radius: var(--radius-sm); padding: 12px 14px;
  font-size: 14.5px; font-family: inherit; color: var(--ink); background: var(--bg); outline: none;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--primary-light); box-shadow: 0 0 0 4px rgba(113,75,103,.10); }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-note { font-size: 12.5px; color: var(--muted); margin-top: 16px; }

/* ---------- Footer ---------- */
.footer { background: var(--bg-dark); color: rgba(255,255,255,.72); padding: 64px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 44px; }
.footer h4 { color: #fff; font-size: 15px; font-weight: 700; margin-bottom: 16px; }
.footer a { display: block; font-size: 14px; padding: 5px 0; color: rgba(255,255,255,.6); transition: color .2s; }
.footer a:hover { color: #fff; }
.footer-brand p { font-size: 14px; margin-top: 14px; max-width: 300px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding-top: 22px; font-size: 13px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

/* ---------- 滚动入场动画 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
.d1 { transition-delay: .06s; } .d2 { transition-delay: .12s; } .d3 { transition-delay: .18s; } .d4 { transition-delay: .24s; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .products-grid { grid-template-columns: repeat(3, 1fr); }
  .hardware-grid, .hardware-grid.hw-3, .hardware-grid.hw-4, .hardware-grid.hw-5 { grid-template-columns: repeat(3, 1fr); }
  .hardware-grid.hw-2 { grid-template-columns: repeat(2, 1fr); }
  .value-grid, .philosophy-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .stats-band { grid-template-columns: repeat(2, 1fr); }
  .about-split, .contact-grid { grid-template-columns: 1fr; gap: 36px; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  section { padding: 60px 0; }
  .nav-links {
    position: fixed; top: 68px; left: 0; right: 0; background: #fff;
    flex-direction: column; gap: 0; padding: 8px 0 16px; box-shadow: var(--shadow-md);
    transform: translateY(-120%); transition: transform .3s ease; z-index: 99;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links a { padding: 14px 24px; width: 100%; }
  .nav-links a.active::after { display: none; }
  .nav-links a.active { background: var(--grad-soft); border-radius: var(--radius-sm); }
  .nav-cta { margin: 8px 24px 0; text-align: center; }
  .nav-toggle { display: block; }
  .products-grid, .video-wrap { grid-template-columns: 1fr 1fr; }
  .product-detail { grid-template-columns: 1fr; }
  .pd-features { grid-template-columns: 1fr; }
  .hero-stats { gap: 20px; flex-wrap: wrap; }
  .form-grid { grid-template-columns: 1fr; }
  .cta-band { padding: 52px 24px; }
}
@media (max-width: 520px) {
  .products-grid, .hardware-grid, .hardware-grid.hw-1, .hardware-grid.hw-2, .hardware-grid.hw-3, .hardware-grid.hw-4, .hardware-grid.hw-5, .value-grid, .philosophy-grid, .stats-band { grid-template-columns: 1fr; }
  .video-wrap { grid-template-columns: 1fr; }
}

/* ===== FAQ ===== */
.faq { padding: 72px 0; background: var(--grad-soft); }
.faq .faq-list { max-width: 860px; margin: 0 auto; display: grid; gap: 14px; }
.faq-item { background: #fff; border: 1px solid #e8e4e6; border-radius: var(--radius-sm); padding: 6px 20px; box-shadow: var(--shadow-sm); }
.faq-item summary { cursor: pointer; font-weight: 600; font-size: 1.02rem; color: var(--ink); padding: 14px 0; list-style: none; position: relative; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; position: absolute; right: 0; top: 50%; transform: translateY(-50%); color: var(--primary); font-size: 1.3rem; font-weight: 700; transition: transform .25s ease; }
.faq-item[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-item p { padding: 0 0 16px; color: #555; line-height: 1.75; }
.faq-more { text-align: center; margin-top: 28px; color: #555; }
.faq-more a { color: var(--primary); font-weight: 600; }