/* ============================================================
   中科微视 NANOVISION — 企业官网样式
   纯手写 CSS，无外部依赖，可离线运行
   ============================================================ */

:root {
  --primary: #0b5cff;
  --primary-dark: #0043c8;
  --navy: #0a2540;
  --navy-light: #123a63;
  --ink: #1f2d3d;
  --muted: #5b6b7f;
  --line: #e3eaf3;
  --bg: #ffffff;
  --bg-soft: #f4f8fd;
  --bg-blue: #eef4ff;
  --accent: #22c3a6;
  --radius: 14px;
  --shadow-sm: 0 2px 10px rgba(10, 37, 64, .06);
  --shadow-md: 0 10px 30px rgba(10, 37, 64, .10);
  --shadow-lg: 0 20px 50px rgba(10, 37, 64, .16);
  --font: "PingFang SC", "Microsoft YaHei", "Segoe UI", "Helvetica Neue",
    "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
ul, ol { list-style: none; }
h1, h2, h3, h4 { color: var(--navy); line-height: 1.3; font-weight: 700; }
strong { color: var(--navy); }

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 84px 0; }
.section-soft { background: var(--bg-soft); }
.section-navy {
  background: linear-gradient(135deg, var(--navy) 0%, #0d3a6e 100%);
  color: #dbe7f5;
}
.section-navy h1, .section-navy h2, .section-navy h3 { color: #fff; }

.section-head { max-width: 760px; margin: 0 auto 52px; text-align: center; }
.section-head.left { margin-left: 0; text-align: left; }
.kicker {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-navy .kicker { color: #7fb0ff; }
.section-title { font-size: clamp(26px, 3.4vw, 38px); margin-bottom: 14px; }
.section-sub { color: var(--muted); font-size: 17px; }
.section-navy .section-sub { color: #b7c9de; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 8px 22px rgba(11, 92, 255, .35);
}
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); }
.btn-ghost {
  background: rgba(255, 255, 255, .08);
  color: #fff;
  border-color: rgba(255, 255, 255, .55);
}
.btn-ghost:hover { background: #fff; color: var(--navy); border-color: #fff; transform: translateY(-2px); }
.btn-outline {
  background: #fff;
  color: var(--primary);
  border-color: var(--primary);
}
.btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: box-shadow .25s ease, border-color .25s ease;
}
.site-header.scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 4px 20px rgba(10, 37, 64, .08);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 19px;
  color: var(--navy);
  letter-spacing: .5px;
}
.logo:hover { color: var(--navy); }
.logo .logo-mark {
  width: 34px; height: 34px;
  flex: 0 0 34px;
}
.logo .logo-en {
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 2px;
  display: block;
  line-height: 1.1;
}
.logo .logo-zh { line-height: 1.1; }
.logo .logo-img {
  height: 40px;
  width: auto;
  display: block;
}
.footer-brand .logo .logo-img {
  height: 52px;
  background: #fff;
  border-radius: 10px;
  padding: 6px 14px;
}

.nav { display: flex; align-items: center; gap: 6px; }
.nav a {
  color: var(--ink);
  font-size: 15px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 8px;
  transition: background .2s, color .2s;
}
.nav a:hover { background: var(--bg-blue); color: var(--primary); }
.nav a.active { color: var(--primary); font-weight: 700; background: var(--bg-blue); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px; height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: transform .25s ease, opacity .25s ease;
}
.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); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 640px;
  display: flex;
  align-items: center;
  color: #fff;
  overflow: hidden;
  background: var(--navy);
}
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
}
.hero-bg::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(7, 28, 56, .94) 0%, rgba(10, 45, 95, .82) 45%, rgba(11, 92, 255, .45) 100%);
}
.hero .container { position: relative; z-index: 2; padding-top: 90px; padding-bottom: 90px; }
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  letter-spacing: 2px;
  color: #9cc2ff;
  border: 1px solid rgba(156, 194, 255, .4);
  border-radius: 999px;
  padding: 6px 16px;
  margin-bottom: 26px;
  background: rgba(11, 92, 255, .12);
}
.hero h1 {
  color: #fff;
  font-size: clamp(34px, 5.4vw, 58px);
  letter-spacing: 1px;
  margin-bottom: 20px;
  max-width: none;
  white-space: nowrap;
}
.hero p.lead {
  font-size: clamp(14px, 1.5vw, 16px);
  color: #c9dcf3;
  max-width: 500px;
  margin-bottom: 38px;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 16px; }

/* 页面内页头（非首页） */
.page-hero {
  position: relative;
  background: linear-gradient(120deg, var(--navy) 0%, #0d3f7d 60%, #0b5cff 130%);
  color: #fff;
  padding: 88px 0 76px;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(600px 300px at 85% 20%, rgba(64, 140, 255, .35), transparent 60%),
    radial-gradient(500px 260px at 10% 90%, rgba(34, 195, 166, .18), transparent 60%);
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 { color: #fff; font-size: clamp(30px, 4.4vw, 46px); margin-bottom: 14px; }
.page-hero p { color: #c9dcf3; font-size: 17px; max-width: 720px; }
.breadcrumb { font-size: 14px; color: #8fb4e6; margin-bottom: 18px; }
.breadcrumb a { color: #b9d2f5; }
.breadcrumb a:hover { color: #fff; }

/* ---------- Stats bar ---------- */
.stats-bar { background: #fff; box-shadow: var(--shadow-md); border-radius: var(--radius); }
.stats-wrap { margin-top: -64px; position: relative; z-index: 5; }
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 34px 12px;
}
.stat { text-align: center; padding: 6px 16px; }
.stat + .stat { border-left: 1px solid var(--line); }
.stat .num {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 800;
  color: var(--primary);
  line-height: 1.15;
}
.stat .num small { font-size: .5em; font-weight: 700; margin-left: 2px; }
.stat .label { color: var(--muted); font-size: 14px; margin-top: 4px; }

/* ---------- Cards ---------- */
.grid { display: grid; gap: 26px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 28px;
  box-shadow: var(--shadow-sm);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: #c8dbff;
}
.card .icon {
  width: 54px; height: 54px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--bg-blue), #dceaff);
  color: var(--primary);
  margin-bottom: 20px;
}
.card h3 { font-size: 20px; margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 15px; }

/* 无图标卡片：内容垂直居中 */
.section-navy .card.card-center {
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 180px;
}
.section-navy .card.card-center h3 {
  color: var(--navy);
  margin: 0 0 10px 0;
}
.section-navy .card.card-center p {
  color: var(--muted);
  margin: 0;
}
.card .tagline {
  display: inline-block;
  margin-top: 14px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: var(--bg-blue);
  border-radius: 999px;
  padding: 4px 12px;
}
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-weight: 600;
  font-size: 15px;
}
.card-link svg { transition: transform .2s; }
.card-link:hover svg { transform: translateX(4px); }

/* ---------- Timeline ---------- */
.timeline { position: relative; max-width: 820px; margin: 0 auto; padding-left: 40px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 10px; top: 6px; bottom: 6px;
  width: 2px;
  background: linear-gradient(var(--primary), #7fb0ff);
  border-radius: 2px;
}
.timeline-item { position: relative; padding-bottom: 40px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -36px; top: 6px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: #fff;
  border: 4px solid var(--primary);
  box-shadow: 0 0 0 5px rgba(11, 92, 255, .12);
}
.timeline-item .tl-date {
  font-weight: 800;
  color: var(--primary);
  font-size: 17px;
  margin-bottom: 4px;
}
.timeline-item h3 { font-size: 19px; margin-bottom: 6px; }
.timeline-item p { color: var(--muted); font-size: 15px; }

/* ---------- Badges / tags ---------- */
.badge-row { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 36px; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--line);
  color: var(--navy);
  font-size: 14px;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}
.badge svg { color: var(--accent); flex: 0 0 auto; }

/* ---------- Compare (technology) ---------- */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
.compare-col {
  border-radius: var(--radius);
  padding: 34px 30px;
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.compare-col.old { background: #fafbfc; }
.compare-col.new {
  border: 2px solid var(--primary);
  box-shadow: 0 14px 36px rgba(11, 92, 255, .16);
  position: relative;
}
.compare-col.new::before {
  content: "推荐方案";
  position: absolute;
  top: -14px; right: 24px;
  background: var(--primary);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 999px;
}
.compare-col h3 { font-size: 21px; margin: 16px 0 14px; }
.compare-col img {
  border-radius: 10px;
  border: 1px solid var(--line);
  aspect-ratio: 16 / 10;
  object-fit: cover;
  width: 100%;
}
.compare-col ul li {
  position: relative;
  padding: 8px 0 8px 30px;
  color: var(--ink);
  font-size: 15px;
  border-bottom: 1px dashed var(--line);
}
.compare-col ul li:last-child { border-bottom: none; }
.compare-col.old ul li::before {
  content: "✕";
  position: absolute; left: 2px;
  color: #d65a5a; font-weight: 700;
}
.compare-col.new ul li::before {
  content: "✓";
  position: absolute; left: 2px;
  color: var(--accent); font-weight: 800;
}

/* ---------- Feature list ---------- */
.feature-list li {
  position: relative;
  padding: 10px 0 10px 34px;
  font-size: 16px;
  border-bottom: 1px dashed var(--line);
}
.feature-list li:last-child { border-bottom: none; }
.feature-list li::before {
  content: "";
  position: absolute;
  left: 4px; top: 16px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--bg-blue);
  border: 4px solid var(--primary);
}

/* ---------- Gallery ---------- */
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.gallery-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform .25s ease, box-shadow .25s ease;
}
.gallery-item:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.gallery-item img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  background: var(--bg-soft);
}
.gallery-item .cap { padding: 16px 18px 20px; }
.gallery-item .cap h4 { font-size: 16px; margin-bottom: 4px; }
.gallery-item .cap p { font-size: 13.5px; color: var(--muted); line-height: 1.55; }
.cap-note {
  display: inline-block;
  font-size: 12px;
  color: #b58500;
  background: #fff7e0;
  border: 1px solid #f0dfa8;
  border-radius: 6px;
  padding: 1px 8px;
  margin-top: 6px;
}

/* ---------- Split blocks ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.split img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--line);
  width: 100%;
}
.split.reverse > .split-media { order: 2; }
.split h2 { font-size: clamp(24px, 3vw, 32px); margin-bottom: 16px; }
.split p { color: var(--muted); margin-bottom: 12px; }

.spec-chips { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.spec-chip {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 18px;
  box-shadow: var(--shadow-sm);
  font-size: 14px;
  color: var(--muted);
}
.spec-chip strong { display: block; font-size: 19px; color: var(--primary); }

/* ---------- Tables ---------- */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  background: #fff;
}
table { width: 100%; border-collapse: collapse; font-size: 15px; min-width: 640px; }
th, td { padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--line); }
thead th {
  background: var(--navy);
  color: #fff;
  font-weight: 600;
  white-space: nowrap;
}
tbody tr:nth-child(even) { background: var(--bg-soft); }
tbody tr:hover { background: var(--bg-blue); }
tbody tr:last-child td { border-bottom: none; }
td.hl, tr.hl td { color: var(--primary); font-weight: 700; }
tr.self td { background: var(--bg-blue) !important; font-weight: 600; color: var(--navy); }

/* ---------- Product hero ---------- */
.product-hero {
  background: linear-gradient(120deg, var(--navy) 0%, #0d3f7d 70%, #0b5cff 140%);
  color: #fff;
  padding: 80px 0;
}
.product-hero .split { gap: 48px; }
.product-hero h1 { color: #fff; font-size: clamp(30px, 4vw, 44px); margin-bottom: 8px; }
.product-hero .model {
  display: inline-block;
  color: #9cc2ff;
  font-weight: 700;
  letter-spacing: 3px;
  margin-bottom: 16px;
}
.product-hero p { color: #c9dcf3; }
.product-hero img {
  border-radius: var(--radius);
  box-shadow: 0 30px 60px rgba(0, 0, 0, .35);
  background: #fff;
}
/* UV1610 产品图为竖版小图，限制展示宽度避免拉伸模糊 */
.product-hero .split-media img {
  max-width: 320px;
  margin-left: auto;
  margin-right: auto;
  width: 100%;
}
.reg-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  background: rgba(34, 195, 166, .15);
  border: 1px solid rgba(34, 195, 166, .5);
  color: #7fe8d2;
  font-size: 14px;
  font-weight: 600;
  border-radius: 999px;
  padding: 8px 18px;
}

/* ---------- Roadmap ---------- */
.roadmap { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.roadmap-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform .25s ease, box-shadow .25s ease;
}
.roadmap-item:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.roadmap-item img { width: 100%; aspect-ratio: 4 / 3; object-fit: contain; background: var(--bg-soft); padding: 12px; }
.roadmap-item .rm-body { padding: 18px 20px 22px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.roadmap-item .rm-year { font-size: 24px; font-weight: 800; color: var(--primary); }
.roadmap-item h4 { font-size: 16.5px; }
.roadmap-item p { font-size: 13.5px; color: var(--muted); flex: 1; }
.rm-status {
  align-self: flex-start;
  font-size: 12px;
  font-weight: 700;
  border-radius: 999px;
  padding: 3px 12px;
}
.rm-status.done { background: #e2f8f1; color: #0c8f76; }
.rm-status.doing { background: var(--bg-blue); color: var(--primary); }
.rm-status.plan { background: #f2f4f7; color: #66788c; }

/* ---------- Market number cards ---------- */
.num-card {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  padding: 30px 26px;
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: transform .25s ease, box-shadow .25s ease;
}
.num-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.num-card .big {
  font-size: clamp(34px, 4vw, 46px);
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
}
.num-card .big small { font-size: .45em; font-weight: 700; }
.num-card h3 { font-size: 17px; margin: 8px 0 6px; }
.num-card p { font-size: 13.5px; color: var(--muted); }

/* 市场路径步骤 */
.path-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; counter-reset: step; }
.path-step {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
  box-shadow: var(--shadow-sm);
}
.path-step::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  font-size: 40px;
  font-weight: 800;
  color: #d6e4ff;
  line-height: 1;
  margin-bottom: 12px;
}
.path-step h3 { font-size: 18px; margin-bottom: 8px; }
.path-step p { color: var(--muted); font-size: 14.5px; }

/* ---------- CTA ---------- */
.cta-band {
  background: linear-gradient(110deg, var(--navy) 0%, #0c4aa0 60%, var(--primary) 120%);
  border-radius: 20px;
  padding: 64px 48px;
  text-align: center;
  color: #fff;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(500px 240px at 90% 10%, rgba(255, 255, 255, .14), transparent 60%);
}
.cta-band h2 { color: #fff; font-size: clamp(24px, 3.2vw, 34px); margin-bottom: 12px; position: relative; }
.cta-band p { color: #c9dcf3; max-width: 640px; margin: 0 auto 30px; position: relative; }
.cta-band .hero-cta { justify-content: center; position: relative; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--navy);
  color: #9db3cc;
  padding: 64px 0 0;
  margin-top: 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
}
.site-footer h4 {
  color: #fff;
  font-size: 16px;
  margin-bottom: 18px;
}
.footer-brand .logo { color: #fff; margin-bottom: 14px; }
.footer-brand p { font-size: 14px; line-height: 1.8; }
.site-footer ul li { margin-bottom: 10px; font-size: 14.5px; }
.site-footer ul a { color: #9db3cc; }
.site-footer ul a:hover { color: #fff; }
.footer-contact li { display: flex; gap: 10px; align-items: flex-start; }
.footer-contact svg { flex: 0 0 18px; margin-top: 4px; color: var(--primary); }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .1);
  padding: 20px 0;
  font-size: 13px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  justify-content: space-between;
}

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.visible { opacity: 1; transform: none; }
.reveal-d1 { transition-delay: .08s; }
.reveal-d2 { transition-delay: .16s; }
.reveal-d3 { transition-delay: .24s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Misc ---------- */
.note { font-size: 13px; color: var(--muted); margin-top: 10px; }
.center { text-align: center; }
.mt-40 { margin-top: 40px; }
.img-frame {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-md);
  background: #fff;
}
.img-frame figcaption {
  padding: 12px 16px;
  font-size: 13.5px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: #fff;
}
.img-frame img { width: 100%; }

/* ---------- Responsive ---------- */
@media (max-width: 992px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .roadmap { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .split { grid-template-columns: 1fr; gap: 32px; }
  .split.reverse > .split-media { order: 0; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); row-gap: 22px; }
  .stat:nth-child(3) { border-left: none; }
  .path-steps { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .hero h1 { white-space: normal; }
  .nav {
    position: fixed;
    top: 72px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-md);
    padding: 12px 20px 20px;
    gap: 4px;
    display: none;
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 14px; font-size: 16px; }
  .nav-toggle { display: flex; }
  .compare { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: 1fr; }
  .roadmap { grid-template-columns: 1fr; }
  .cta-band { padding: 44px 24px; }
  .hero { min-height: 560px; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .stats-bar { grid-template-columns: 1fr 1fr; }
  .timeline { padding-left: 34px; }
}