:root {
  --green-700: #0F766E;
  --green-600: #0D9488;
  --green-500: #14B8A6;
  --green-50: #ECFDF5;
  --amber-500: #F59E0B;
  --amber-600: #D97706;
  --ink: #1F2933;
  --muted: #5B6B7B;
  --bg: #FFFFFF;
  --bg-soft: #F6F9F8;
  --border: #E3E8EE;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 10px 30px rgba(15, 23, 42, .08);
  --shadow-sm: 0 4px 14px rgba(15, 23, 42, .06);
  --maxw: 1140px;
  --header-h: 68px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--green-700); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.container-wide { max-width: 1240px; margin: 0 auto; padding: 0 20px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
  color: var(--ink);
}
.brand .logo-mark {
  width: 34px; height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--green-600), var(--green-500));
  display: grid; place-items: center;
  color: #fff; font-size: 18px; font-weight: 900;
}
.brand small { display: block; font-size: 11px; color: var(--muted); font-weight: 600; letter-spacing: .5px; }
.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  color: var(--ink);
  font-weight: 600;
  font-size: 15px;
  padding: 8px 12px;
  border-radius: 8px;
}
.nav-links a:hover { background: var(--green-50); text-decoration: none; color: var(--green-700); }
.nav-links a.active { color: var(--green-700); }
.nav-cta {
  background: var(--amber-500);
  color: #fff !important;
  padding: 9px 16px !important;
  border-radius: 999px !important;
  font-weight: 700;
}
.nav-cta:hover { background: var(--amber-600); }
.nav-toggle { display: none; background: none; border: 0; font-size: 26px; cursor: pointer; color: var(--ink); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 16px;
  cursor: pointer;
  border: 0;
  transition: transform .08s ease, box-shadow .2s ease, background .2s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--green-600); color: #fff; box-shadow: 0 8px 20px rgba(13, 148, 136, .28); }
.btn-primary:hover { background: var(--green-700); }
.btn-amber { background: var(--amber-500); color: #fff; box-shadow: 0 8px 20px rgba(245, 158, 11, .3); }
.btn-amber:hover { background: var(--amber-600); }
.btn-ghost { background: #fff; color: var(--green-700); border: 1px solid var(--border); }
.btn-ghost:hover { border-color: var(--green-500); }
.btn-lg { padding: 16px 32px; font-size: 17px; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background:
    radial-gradient(900px 400px at 85% -10%, rgba(20, 184, 166, .18), transparent 60%),
    linear-gradient(180deg, #f3fbf9 0%, #ffffff 100%);
  overflow: hidden;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 40px;
  align-items: center;
  padding: 64px 0 72px;
}
.hero h1 {
  font-size: clamp(30px, 4.6vw, 50px);
  line-height: 1.15;
  margin: 0 0 18px;
  letter-spacing: -.5px;
}
.hero h1 .hl { color: var(--green-700); }
.hero p.lead {
  font-size: 18px;
  color: var(--muted);
  margin: 0 0 28px;
  max-width: 540px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 26px; }
.hero-trust {
  display: flex; gap: 22px; flex-wrap: wrap;
  color: var(--muted); font-size: 14px;
}
.hero-trust b { color: var(--ink); font-size: 22px; display: block; }
.hero-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 22px;
  box-shadow: var(--shadow);
}
.hero-card img { border-radius: 12px; width: 100%; }
.hero-badge {
  position: absolute; top: 22px; left: 0;
  background: var(--amber-500); color: #fff;
  font-weight: 700; font-size: 13px;
  padding: 6px 14px 6px 18px;
  border-radius: 0 999px 999px 0;
}

/* ---------- Sections ---------- */
.section { padding: 64px 0; }
.section-soft { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 44px; }
.section-head .eyebrow {
  color: var(--green-700); font-weight: 700; letter-spacing: 2px;
  font-size: 13px; text-transform: uppercase;
}
.section-head h2 { font-size: clamp(26px, 3.4vw, 38px); margin: 10px 0 12px; }
.section-head p { color: var(--muted); font-size: 17px; margin: 0; }
.page-h1 { font-size: clamp(26px, 3.2vw, 34px); line-height: 1.25; margin: 0 0 22px; color: var(--ink); font-weight: 800; }

/* ---------- Cards grid ---------- */
.grid { display: grid; gap: 22px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow-sm);
  transition: transform .12s ease, box-shadow .2s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.card .ico {
  width: 48px; height: 48px; border-radius: 12px;
  background: var(--green-50); color: var(--green-700);
  display: grid; place-items: center; font-size: 24px; margin-bottom: 14px;
}
.card h3 { margin: 0 0 8px; font-size: 19px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.card .tags { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  font-size: 12px; background: var(--green-50); color: var(--green-700);
  padding: 4px 10px; border-radius: 999px; font-weight: 600;
}

/* ---------- Process steps ---------- */
.steps { counter-reset: step; display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.step {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px 18px; text-align: center; position: relative;
}
.step::before {
  counter-increment: step; content: counter(step);
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--green-600); color: #fff; font-weight: 800;
  display: grid; place-items: center; margin: 0 auto 12px;
}
.step h4 { margin: 0 0 6px; font-size: 16px; }
.step p { margin: 0; font-size: 13px; color: var(--muted); }

/* ---------- Feature / split ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.split .media {
  border-radius: 18px; overflow: hidden; box-shadow: var(--shadow);
  border: 1px solid var(--border);
}
.checklist { list-style: none; padding: 0; margin: 18px 0 0; }
.checklist li { position: relative; padding-left: 30px; margin-bottom: 12px; }
.checklist li::before {
  content: "✓"; position: absolute; left: 0; top: 0;
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--green-50); color: var(--green-700);
  display: grid; place-items: center; font-size: 12px; font-weight: 800;
}
.stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 8px; }
.stat { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; text-align: center; }
.stat b { display: block; font-size: 30px; color: var(--green-700); }
.stat span { font-size: 14px; color: var(--muted); }

/* ---------- Cases ---------- */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.case {
  border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; background: #fff; box-shadow: var(--shadow-sm);
  transition: transform .12s ease, box-shadow .2s ease;
}
.case:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.case .thumb { aspect-ratio: 4/3; width: 100%; object-fit: cover; }
.case .case-body { padding: 18px 20px 22px; }
.case .case-meta { font-size: 13px; color: var(--green-700); font-weight: 700; }
.case h3 { margin: 6px 0 8px; font-size: 18px; }
.case p { margin: 0; color: var(--muted); font-size: 14px; }
.case .case-tags { margin-top: 12px; display: flex; flex-wrap: wrap; gap: 6px; }

/* ---------- FAQ ---------- */
.faq { max-width: 820px; margin: 0 auto; }
.faq details {
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 4px 18px; margin-bottom: 12px; background: #fff;
}
.faq summary {
  cursor: pointer; font-weight: 700; padding: 14px 0; list-style: none;
  display: flex; justify-content: space-between; align-items: center;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 22px; color: var(--green-600); font-weight: 400; }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 0 0 16px; color: var(--muted); }

/* ---------- Lead form ---------- */
.lead-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.lead-form {
  background: #fff; border: 1px solid var(--border); border-radius: 18px;
  padding: 30px; box-shadow: var(--shadow);
}
.lead-form h3 { margin: 0 0 6px; font-size: 22px; }
.lead-form .sub { color: var(--muted); margin: 0 0 20px; font-size: 15px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-weight: 600; margin-bottom: 7px; font-size: 14px; }
.field input, .field select, .field textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--border);
  border-radius: 10px; font-size: 15px; font-family: inherit; color: var(--ink);
  background: #fff; transition: border-color .15s ease, box-shadow .15s ease;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 0; border-color: var(--green-500); box-shadow: 0 0 0 3px rgba(20, 184, 166, .15);
}
.field textarea { resize: vertical; min-height: 90px; }
.field .err { color: #dc2626; font-size: 13px; margin-top: 5px; display: none; }
.field.invalid input, .field.invalid select { border-color: #dc2626; }
.field.invalid .err { display: block; }
.form-note { font-size: 13px; color: var(--muted); margin-top: 6px; }
.form-success {
  display: none; background: var(--green-50); border: 1px solid var(--green-500);
  color: var(--green-700); border-radius: 12px; padding: 16px 18px; margin-bottom: 18px;
  font-weight: 600;
}
.form-success.show { display: block; }

.contact-side .info-card {
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px; margin-bottom: 16px;
}
.contact-side .info-card h4 { margin: 0 0 10px; font-size: 16px; }
.contact-side .info-card p { margin: 0; color: var(--muted); }
.contact-side .info-card .big { font-size: 22px; font-weight: 800; color: var(--green-700); }

/* ---------- District list ---------- */
.district-list { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.district-list a {
  border: 1px solid var(--border); border-radius: 999px; padding: 9px 18px;
  font-weight: 600; color: var(--ink); background: #fff;
}
.district-list a:hover { border-color: var(--green-500); color: var(--green-700); text-decoration: none; }

/* ---------- CTA banner ---------- */
.cta-banner {
  background: linear-gradient(135deg, var(--green-700), var(--green-600));
  color: #fff; border-radius: 20px; padding: 46px 40px; text-align: center;
}
.cta-banner h2 { color: #fff; margin: 0 0 10px; font-size: clamp(24px, 3vw, 34px); }
.cta-banner p { color: rgba(255,255,255,.85); margin: 0 0 22px; font-size: 17px; }
.cta-banner .btn-amber { background: var(--amber-500); }
.cta-banner .btn-amber:hover { background: var(--amber-600); }

/* ---------- Breadcrumb ---------- */
.breadcrumb { font-size: 13px; color: var(--muted); padding: 16px 0 0; }
.breadcrumb a { color: var(--muted); }
.breadcrumb span { margin: 0 6px; }

/* ---------- Footer ---------- */
.site-footer { background: #0F1B22; color: #C7D2D8; padding: 54px 0 26px; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.4fr; gap: 32px; }
.site-footer h4 { color: #fff; font-size: 15px; margin: 0 0 16px; letter-spacing: .5px; }
.site-footer a { color: #C7D2D8; }
.site-footer a:hover { color: #fff; text-decoration: none; }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: 10px; font-size: 14px; }
.footer-brand .brand { color: #fff; margin-bottom: 12px; }
.footer-brand p { font-size: 14px; color: #9FB0B8; max-width: 280px; }
.footer-contact p { margin: 0 0 8px; font-size: 14px; }
.footer-contact .big { font-size: 20px; font-weight: 800; color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1); margin-top: 34px; padding-top: 18px;
  font-size: 13px; color: #8B9BA3; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
}
.footer-friends { border-top: 1px solid rgba(255,255,255,.1); margin-top: 26px; padding-top: 20px; }
.footer-friends h4 { color: #fff; font-size: 15px; margin: 0 0 14px; letter-spacing: .5px; }
.footer-friends .friend-links { display: flex; flex-wrap: wrap; gap: 10px 20px; }
.footer-friends .friend-links a {
  color: #9FB0B8; font-size: 13px; text-decoration: none; padding: 3px 0;
  border-bottom: 1px solid transparent; transition: color .15s, border-color .15s;
}
.footer-friends .friend-links a:hover { color: #2DD4BF; border-color: #2DD4BF; text-decoration: none; }
.site-network { border-top: 1px solid rgba(255,255,255,.1); margin-top: 26px; padding-top: 20px; }
.site-network h4 { color: #fff; font-size: 15px; margin: 0 0 14px; letter-spacing: .5px; }
.site-network .network-links { display: flex; flex-wrap: wrap; gap: 10px 20px; align-items: center; }
.site-network .network-links a { color: #9FB0B8; font-size: 13px; text-decoration: none; padding: 3px 0; border-bottom: 1px solid transparent; transition: color .15s, border-color .15s; }
.site-network .network-links a:hover { color: #2DD4BF; border-color: #2DD4BF; text-decoration: none; }
.site-network .network-links .current { color: #2DD4BF; font-size: 13px; font-weight: 600; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-card { max-width: 460px; }
  .grid-3, .grid-4, .case-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .split, .lead-wrap { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

/* ---------- Anchor offset for sticky header ---------- */
main { scroll-margin-top: 80px; }
section[id], [id^="ch"] { scroll-margin-top: 84px; }

/* ---------- Whitepaper ---------- */
.wp-layout { display: grid; grid-template-columns: 240px 1fr; gap: 48px; align-items: start; }
.wp-toc {
  position: sticky; top: 84px; align-self: start;
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px 18px;
}
.wp-toc h4 { margin: 0 0 12px; font-size: 14px; color: var(--muted); letter-spacing: 1px; }
.wp-toc a { display: block; padding: 7px 10px; border-radius: 8px; color: var(--ink); font-size: 14px; font-weight: 600; }
.wp-toc a:hover { background: #fff; color: var(--green-700); text-decoration: none; }
.wp-toc .sub { padding-left: 14px; font-weight: 500; }
.wp-body h2 { font-size: clamp(24px, 3vw, 32px); margin: 0 0 14px; color: var(--ink); }
.wp-body h3 { font-size: 21px; margin: 34px 0 12px; color: var(--green-700); }
.wp-body p { color: var(--muted); margin: 0 0 14px; }
.wp-body ul.tight { padding-left: 22px; margin: 0 0 14px; }
.wp-body ul.tight li { margin-bottom: 8px; color: var(--muted); }
.wp-body strong { color: var(--ink); }

/* data cards */
.datacard-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 18px 0 8px; }
.datacard { background: var(--green-50); border: 1px solid #cdeee7; border-radius: var(--radius); padding: 22px; text-align: center; }
.datacard b { display: block; font-size: 30px; color: var(--green-700); line-height: 1.1; }
.datacard span { font-size: 14px; color: var(--muted); }

/* scenario / data table */
.tbl-wrap { overflow-x: auto; margin: 16px 0 8px; border: 1px solid var(--border); border-radius: var(--radius); }
table.tbl { width: 100%; border-collapse: collapse; font-size: 15px; min-width: 640px; }
table.tbl th, table.tbl td { padding: 13px 16px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
table.tbl thead th { background: var(--green-700); color: #fff; font-weight: 700; }
table.tbl tbody tr:nth-child(even) { background: var(--bg-soft); }
table.tbl td b { color: var(--ink); }

/* persona cards */
.persona-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 16px 0; }
.persona-card { border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; background: #fff; box-shadow: var(--shadow-sm); }
.persona-card .pico { font-size: 26px; margin-bottom: 8px; }
.persona-card h4 { margin: 0 0 8px; font-size: 17px; }
.persona-card p { margin: 0; font-size: 14px; color: var(--muted); }

/* callout */
.callout { border-left: 4px solid var(--amber-500); background: #fff8ec; border-radius: 0 12px 12px 0; padding: 16px 20px; margin: 18px 0; }
.callout.blue { border-left-color: var(--green-500); background: var(--green-50); }
.callout p { margin: 0; color: var(--ink); font-size: 15px; }
.callout b { color: var(--green-700); }

/* wp download / cta */
.wp-download { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; background: var(--green-50); border: 1px dashed var(--green-500); border-radius: var(--radius); padding: 22px 24px; margin: 26px 0; }
.wp-download .dd-text { flex: 1; min-width: 220px; }
.wp-download .dd-text h4 { margin: 0 0 4px; font-size: 17px; }
.wp-download .dd-text p { margin: 0; font-size: 14px; color: var(--muted); }

/* ---------- FAQ center ---------- */
.faq-cats { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 36px; }
.faq-cats a { border: 1px solid var(--border); border-radius: 999px; padding: 9px 18px; font-weight: 600; color: var(--ink); background: #fff; }
.faq-cats a:hover { border-color: var(--green-500); color: var(--green-700); text-decoration: none; }
.faq-group { max-width: 860px; margin: 0 auto 40px; }
.faq-group h2 { font-size: 22px; margin: 0 0 18px; padding-left: 12px; border-left: 4px solid var(--green-600); }

/* ---------- Blog / 装修干货 ---------- */
.blog-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.blog-card {
  display: block; background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow-sm);
  transition: transform .12s ease, box-shadow .2s ease; color: var(--ink);
}
.blog-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); text-decoration: none; color: var(--ink); }
.blog-card-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; font-size: 13px; color: var(--muted); }
.blog-card h3 { margin: 0 0 10px; font-size: 20px; line-height: 1.4; }
.blog-card p { margin: 0 0 16px; color: var(--muted); font-size: 15px; }
.blog-more { color: var(--green-700); font-weight: 700; font-size: 14px; }
.post { max-width: 820px; margin: 0 auto; }
.post-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; font-size: 14px; color: var(--muted); }
.post-title { font-size: clamp(26px, 3.6vw, 38px); line-height: 1.25; margin: 0 0 14px; }
.post-lead { font-size: 18px; color: var(--muted); margin: 0 0 28px; padding-bottom: 24px; border-bottom: 1px solid var(--border); }
.post-body h2 { font-size: clamp(22px, 2.8vw, 28px); margin: 34px 0 14px; color: var(--green-700); }
.post-body p { color: var(--muted); margin: 0 0 16px; }
.post-body ul.tight, .post-body ol.tight { padding-left: 22px; margin: 0 0 16px; }
.post-body ul.tight li, .post-body ol.tight li { margin-bottom: 8px; color: var(--muted); }
.post-body strong { color: var(--ink); }
.post-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; padding-top: 26px; border-top: 1px solid var(--border); }
.blog-card-cover {
  width: calc(100% + 52px); margin: -26px -26px 18px;
  aspect-ratio: 16 / 9; object-fit: cover;
  border-radius: var(--radius) var(--radius) 0 0;
  background: var(--green-50); display: block;
}
.post-cover {
  width: 100%; aspect-ratio: 16 / 9; object-fit: cover;
  border-radius: var(--radius); margin-bottom: 26px;
  background: var(--green-50); display: block;
}

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed; right: 22px; bottom: 22px;
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--green-600); color: #fff; border: 0;
  font-size: 22px; line-height: 1; cursor: pointer;
  box-shadow: var(--shadow); display: grid; place-items: center;
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity .25s ease, transform .25s ease, visibility .25s, background .2s;
  z-index: 60;
}
.back-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--green-700); }

@media (max-width: 960px) {
  .wp-layout { grid-template-columns: 1fr; }
  .wp-toc { position: static; }
  .datacard-grid, .persona-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 680px) {
  .datacard-grid, .persona-grid, .blog-list { grid-template-columns: 1fr; }
  .nav-links {
    position: absolute; top: var(--header-h); left: 0; right: 0;
    background: #fff; flex-direction: column; align-items: stretch;
    padding: 10px 20px 18px; border-bottom: 1px solid var(--border);
    display: none; box-shadow: var(--shadow);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px; }
  .nav-toggle { display: block; }
  .nav-cta { text-align: center; }
  .grid-2, .grid-3, .grid-4, .case-grid, .steps { grid-template-columns: 1fr; }
  .section { padding: 48px 0; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-trust { gap: 14px 16px; }
  .hero-actions .btn { flex: 1 1 auto; justify-content: center; }
}