/* ============================================================
   RenQi Intelligence — renqiintelligence.com
   Solar lighting & smart security · export-ready OEM/ODM
   ============================================================ */
:root {
  --navy: #0a1a30;
  --navy-2: #0e2a52;
  --navy-3: #123c7a;
  --blue: #1e6fe0;
  --blue-d: #0a4fc4;
  --amber: #ffb020;
  --amber-d: #f59e00;
  --bg: #f4f7fb;
  --card: #ffffff;
  --ink: #13233c;
  --muted: #5b6b82;
  --line: #e3eaf4;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(13, 38, 76, .08);
  --shadow-lg: 0 24px 60px rgba(13, 38, 76, .16);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "Inter", "Segoe UI", "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--blue-d); text-decoration: none; }
a:hover { text-decoration: none; }
.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.section { padding: 84px 0; }
.section.alt { background: #fff; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: var(--blue-d); margin-bottom: 14px;
}
.eyebrow::before { content: ""; width: 26px; height: 3px; border-radius: 2px; background: var(--amber); }
h1, h2, h3 { line-height: 1.22; letter-spacing: -.015em; }
.section-title { font-size: clamp(26px, 3.4vw, 38px); font-weight: 800; color: var(--navy); margin-bottom: 14px; }
.section-sub { color: var(--muted); max-width: 720px; font-size: 16.5px; margin-bottom: 44px; }
.center { text-align: center; }
.center .section-sub { margin-left: auto; margin-right: auto; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 13px 26px; border-radius: 999px; border: 0; cursor: pointer;
  font: inherit; font-weight: 700; font-size: 15px; color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--blue-d));
  box-shadow: 0 8px 22px rgba(30, 111, 224, .32);
  transition: transform .18s ease, box-shadow .18s ease;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(30, 111, 224, .4); }
.btn.amber {
  background: linear-gradient(135deg, var(--amber), var(--amber-d));
  color: var(--navy); box-shadow: 0 8px 22px rgba(245, 158, 0, .35);
}
.btn.ghost {
  background: rgba(255, 255, 255, .08); border: 1.5px solid rgba(255, 255, 255, .45);
  box-shadow: none; backdrop-filter: blur(4px);
}
.btn.ghost:hover { background: rgba(255, 255, 255, .16); box-shadow: none; }
.btn.outline {
  background: #fff; color: var(--blue-d); border: 1.5px solid var(--line); box-shadow: none;
}
.btn.outline:hover { border-color: var(--blue); box-shadow: none; }

/* ---------- Top bar ---------- */
.topbar { background: var(--navy); color: #cfe0f5; font-size: 13px; }
.topbar .container { display: flex; justify-content: space-between; align-items: center; min-height: 38px; gap: 16px; }
.topbar a { color: #fff; font-weight: 600; }
.topbar .tb-right { display: flex; gap: 18px; align-items: center; }
.tb-flag { color: var(--amber); font-weight: 700; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 60;
  background: rgba(255, 255, 255, .92); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; min-height: 74px; gap: 20px; }
.brand img { height: 46px; width: auto; }
.nav-links { display: flex; align-items: center; gap: 30px; list-style: none; }
.nav-links a { color: var(--ink); font-weight: 600; font-size: 15px; padding: 8px 0; position: relative; }
.nav-links a:hover, .nav-links a.active { color: var(--blue-d); }
.nav-links a.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 3px;
  border-radius: 2px; background: linear-gradient(90deg, var(--blue), var(--amber));
}
.nav-cta { display: flex; align-items: center; gap: 14px; }
.lang-switch {
  font-weight: 700; font-size: 13.5px; padding: 8px 16px; border-radius: 999px;
  border: 1.5px solid var(--line); color: var(--blue-d); background: #fff;
  transition: border-color .15s, background .15s; white-space: nowrap;
}
.lang-switch:hover { border-color: var(--blue); background: #f4f8ff; }
.nav-burger { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-burger span { display: block; width: 24px; height: 2.6px; background: var(--navy); margin: 5px 0; border-radius: 2px; transition: .25s; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden; color: #fff;
  background:
    radial-gradient(720px 420px at 88% -10%, rgba(255, 176, 32, .28), transparent 62%),
    radial-gradient(900px 500px at -8% 110%, rgba(30, 111, 224, .35), transparent 60%),
    linear-gradient(135deg, var(--navy) 0%, var(--navy-2) 55%, var(--navy-3) 100%);
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,.7), transparent 75%);
}
.hero .container { position: relative; z-index: 1; display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; padding-top: 88px; padding-bottom: 96px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; margin-bottom: 20px;
  padding: 7px 16px; border-radius: 999px; font-size: 13.5px; font-weight: 600;
  color: #ffd88a; background: rgba(255, 176, 32, .12); border: 1px solid rgba(255, 176, 32, .35);
}
.hero h1 { font-size: clamp(32px, 4.6vw, 54px); font-weight: 800; margin-bottom: 20px; }
.hero h1 em { font-style: normal; background: linear-gradient(100deg, var(--amber), #ffd88a); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { color: #b9c9e2; font-size: 17.5px; max-width: 540px; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 40px; }
.hero-stats { display: flex; gap: 38px; flex-wrap: wrap; }
.hero-stat b { display: block; font-size: 24px; font-weight: 800; color: #fff; }
.hero-stat b em { font-style: normal; color: var(--amber); }
.hero-stat span { font-size: 13px; color: #9db1cf; }

.hero-visual { position: relative; min-height: 460px; }
.hero-card {
  position: absolute; background: #fff; border-radius: 18px; padding: 12px;
  box-shadow: var(--shadow-lg); animation: floaty 7s ease-in-out infinite;
}
.hero-card img { border-radius: 10px; width: 100%; height: 100%; object-fit: cover; }
.hero-card .hc-tag {
  position: absolute; left: 14px; top: 14px; padding: 5px 13px; border-radius: 999px;
  background: rgba(10, 26, 48, .82); color: #fff; font-size: 12.5px; font-weight: 700; backdrop-filter: blur(4px);
}
.hc-1 { width: 56%; top: 0; left: 0; transform: rotate(-3deg); z-index: 2; }
.hc-2 { width: 46%; top: 14%; right: 0; transform: rotate(2.5deg); animation-delay: 1.2s; z-index: 1; }
.hc-3 { width: 55%; bottom: 0; left: 16%; transform: rotate(-1.5deg); animation-delay: 2.4s; z-index: 3; }
@keyframes floaty { 0%, 100% { translate: 0 0; } 50% { translate: 0 -12px; } }

/* ---------- Trust strip ---------- */
.trust { background: #fff; border-bottom: 1px solid var(--line); }
.trust .container { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding-top: 26px; padding-bottom: 26px; }
.trust-item { display: flex; gap: 13px; align-items: center; }
.trust-item .ti-ico {
  flex: 0 0 44px; width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center;
  background: linear-gradient(135deg, #eaf2ff, #dbe9ff); color: var(--blue-d);
}
.trust-item b { display: block; font-size: 14.5px; color: var(--navy); }
.trust-item span { font-size: 12.8px; color: var(--muted); }

/* ---------- Product cards ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.p-card {
  background: var(--card); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
  display: flex; flex-direction: column; transition: transform .22s ease, box-shadow .22s ease;
  border: 1px solid var(--line);
}
.p-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.p-media { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: #fff; }
.p-media img { width: 100%; height: 100%; object-fit: contain; transition: transform .5s ease; }
.p-card:hover .p-media img { transform: scale(1.05); }
.p-flag {
  position: absolute; top: 14px; left: 14px; padding: 5px 13px; border-radius: 999px;
  font-size: 12px; font-weight: 800; letter-spacing: .06em; text-transform: uppercase;
  background: var(--amber); color: var(--navy);
}
.p-flag.blue { background: var(--blue); color: #fff; }
.p-body { padding: 22px 22px 24px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
.p-body h3 { font-size: 19px; color: var(--navy); font-weight: 800; }
.p-body h3 a { color: inherit; }
.p-body p { color: var(--muted); font-size: 14.5px; flex: 1; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font-size: 12.3px; font-weight: 700; color: var(--blue-d);
  background: #eef4ff; border: 1px solid #dbe8ff; padding: 4px 11px; border-radius: 999px;
}
.p-link { font-weight: 700; font-size: 14.5px; color: var(--blue-d); display: inline-flex; align-items: center; gap: 6px; }
.p-link:hover { gap: 10px; }
.p-link { transition: gap .2s; }

/* ---------- Feature blocks ---------- */
.f-block { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 24px; box-shadow: var(--shadow); }
.f-block .fb-ico {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; margin-bottom: 16px;
  background: linear-gradient(135deg, var(--blue), var(--navy-3)); color: #fff;
  box-shadow: 0 8px 18px rgba(30, 111, 224, .3);
}
.f-block .fb-ico.amber { background: linear-gradient(135deg, var(--amber), var(--amber-d)); color: var(--navy); box-shadow: 0 8px 18px rgba(245, 158, 0, .3); }
.f-block h3 { font-size: 17px; margin-bottom: 8px; color: var(--navy); }
.f-block p { font-size: 14.3px; color: var(--muted); }

/* ---------- Steps ---------- */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; counter-reset: step; }
.step { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px 20px; position: relative; box-shadow: var(--shadow); }
.step::before {
  counter-increment: step; content: "0" counter(step);
  font-size: 30px; font-weight: 800; color: transparent;
  background: linear-gradient(120deg, var(--blue), var(--amber));
  -webkit-background-clip: text; background-clip: text; display: block; margin-bottom: 10px;
}
.step b { display: block; font-size: 15.5px; color: var(--navy); margin-bottom: 6px; }
.step span { font-size: 13.4px; color: var(--muted); }

/* ---------- CTA band ---------- */
.cta-band {
  border-radius: 24px; padding: 54px 48px; color: var(--navy);
  background:
    radial-gradient(420px 260px at 92% 0%, rgba(255, 255, 255, .5), transparent 60%),
    linear-gradient(120deg, var(--amber) 0%, #ffc75e 55%, #ffd88a 100%);
  box-shadow: 0 24px 60px rgba(245, 158, 0, .28);
  display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap;
}
.cta-band h2 { font-size: clamp(24px, 3vw, 34px); font-weight: 800; max-width: 640px; }
.cta-band p { margin-top: 8px; color: rgba(10, 26, 48, .78); max-width: 560px; }
.cta-band .btn { background: var(--navy); box-shadow: 0 10px 24px rgba(10, 26, 48, .35); }
.cta-band .btn:hover { box-shadow: 0 16px 34px rgba(10, 26, 48, .4); }

/* ---------- Page hero (subpages) ---------- */
.page-hero {
  position: relative; color: #fff; overflow: hidden;
  background:
    radial-gradient(640px 340px at 90% -20%, rgba(255, 176, 32, .25), transparent 60%),
    linear-gradient(120deg, var(--navy), var(--navy-2) 60%, var(--navy-3));
  padding: 64px 0 58px;
}
.page-hero h1 { font-size: clamp(28px, 3.8vw, 42px); font-weight: 800; margin-bottom: 12px; }
.page-hero p { color: #b9c9e2; max-width: 680px; font-size: 16.5px; }
.breadcrumb { font-size: 13.5px; color: #8fa6c8; margin-bottom: 18px; }
.breadcrumb a { color: #cfe0f5; }
.breadcrumb a:hover { color: #fff; }

/* ---------- Product detail ---------- */
.pd-wrap { display: grid; grid-template-columns: 1.02fr .98fr; gap: 46px; align-items: start; }
.gallery-main {
  border-radius: var(--radius); overflow: hidden; background: #fff; border: 1px solid var(--line);
  aspect-ratio: 1 / 1; display: grid; place-items: center; box-shadow: var(--shadow);
}
.gallery-main img { width: 100%; height: 100%; object-fit: contain; mix-blend-mode: normal; }
.gallery-thumbs { display: flex; gap: 12px; margin-top: 14px; flex-wrap: wrap; }
.gallery-thumbs button {
  width: 68px; height: 68px; border-radius: 12px; border: 2px solid var(--line); background: #fff;
  padding: 5px; cursor: pointer; overflow: hidden; transition: border-color .18s, transform .18s;
}
.gallery-thumbs button img { width: 100%; height: 100%; object-fit: cover; }
.gallery-thumbs button:hover { transform: translateY(-3px); }
.gallery-thumbs button.active { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(30, 111, 224, .15); }
.pd-summary h1 { font-size: clamp(26px, 3.2vw, 36px); color: var(--navy); font-weight: 800; margin: 6px 0 14px; }
.pd-summary .lead { color: var(--muted); font-size: 16px; margin-bottom: 22px; }
.pd-points { list-style: none; display: grid; gap: 11px; margin: 22px 0 28px; }
.pd-points li { display: flex; gap: 11px; font-size: 15px; color: var(--ink); }
.pd-points li svg { flex: 0 0 22px; margin-top: 2px; }
.pd-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- Spec table ---------- */
.spec-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.spec-card h3 { padding: 20px 26px; font-size: 18px; color: var(--navy); border-bottom: 1px solid var(--line); background: #fafcff; }
.spec-table { width: 100%; border-collapse: collapse; font-size: 14.6px; }
.spec-table tr:nth-child(even) { background: #f8fafd; }
.spec-table th, .spec-table td { padding: 13px 26px; text-align: left; vertical-align: top; }
.spec-table th { width: 36%; font-weight: 700; color: var(--navy); }
.spec-table td { color: var(--muted); }
.spec-note { padding: 14px 26px 20px; font-size: 13px; color: var(--muted); border-top: 1px dashed var(--line); }

/* ---------- Factory parameter shots (detail gallery) ---------- */
.detail-grid { columns: 3; column-gap: 20px; margin-top: 44px; }
.detail-grid figure {
  break-inside: avoid; margin: 0 0 20px; background: #fff;
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
}
.detail-grid img { width: 100%; height: auto; }
.detail-grid figcaption {
  padding: 11px 16px 13px; font-size: 13.5px; font-weight: 700; color: var(--navy);
  border-top: 1px solid var(--line); background: #fafcff;
}

/* ---------- Feature list (detail page) ---------- */
.feat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.feat-cell { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px 22px; box-shadow: var(--shadow); }
.feat-cell .fc-ico {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 14px;
  background: #eef4ff; color: var(--blue-d);
}
.feat-cell h3 { font-size: 16px; color: var(--navy); margin-bottom: 7px; }
.feat-cell p { font-size: 14px; color: var(--muted); }

/* ---------- Contact ---------- */
.contact-wrap { display: grid; grid-template-columns: .9fr 1.1fr; gap: 40px; align-items: start; }
.info-card { background: var(--navy); color: #dbe7f7; border-radius: var(--radius); padding: 36px 34px; box-shadow: var(--shadow-lg); position: relative; overflow: hidden; }
.info-card::after {
  content: ""; position: absolute; right: -70px; top: -70px; width: 220px; height: 220px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 176, 32, .35), transparent 70%);
}
.info-card h3 { color: #fff; font-size: 20px; margin-bottom: 18px; }
.info-line { display: flex; gap: 14px; margin-bottom: 18px; position: relative; z-index: 1; }
.info-line .il-ico { flex: 0 0 42px; width: 42px; height: 42px; border-radius: 11px; display: grid; place-items: center; background: rgba(255, 255, 255, .1); color: var(--amber); }
.info-line b { display: block; color: #fff; font-size: 14.5px; }
.info-line span, .info-line a { font-size: 14.5px; color: #b9c9e2; }
.info-line a:hover { color: #fff; }
.form-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 36px 34px; box-shadow: var(--shadow); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 13.5px; font-weight: 700; color: var(--navy); }
.field input, .field select, .field textarea {
  font: inherit; font-size: 14.5px; padding: 12px 14px; border-radius: 11px;
  border: 1.5px solid var(--line); background: #fafcff; color: var(--ink); outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(30, 111, 224, .13); }
.field textarea { min-height: 130px; resize: vertical; }
.form-hint { font-size: 13px; color: var(--muted); margin-top: 12px; }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.about-visual { position: relative; }
.about-visual .av-main { border-radius: 20px; box-shadow: var(--shadow-lg); overflow: hidden; }
.about-visual .av-badge {
  position: absolute; bottom: -22px; left: -14px; background: #fff; border-radius: 16px; padding: 16px 22px;
  box-shadow: var(--shadow-lg); display: flex; gap: 22px;
}
.about-visual .av-badge div b { font-size: 21px; color: var(--navy); display: block; }
.about-visual .av-badge div span { font-size: 12.5px; color: var(--muted); }
.value-list { list-style: none; display: grid; gap: 16px; margin-top: 26px; }
.value-list li { display: flex; gap: 14px; }
.value-list .vl-ico { flex: 0 0 44px; width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: linear-gradient(135deg, #eaf2ff, #dbe9ff); color: var(--blue-d); }
.value-list b { color: var(--navy); font-size: 15.5px; display: block; }
.value-list p { color: var(--muted); font-size: 14.3px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--navy); color: #9db1cf; margin-top: 0; }
.footer-top { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1.1fr; gap: 40px; padding: 62px 0 44px; }
.site-footer .f-brand img { height: 42px; margin-bottom: 16px; }
.site-footer p { font-size: 14px; max-width: 300px; }
.site-footer h4 { color: #fff; font-size: 15px; margin-bottom: 16px; letter-spacing: .04em; }
.f-links { list-style: none; display: grid; gap: 10px; }
.f-links a { color: #9db1cf; font-size: 14px; }
.f-links a:hover { color: #fff; }
.f-contact { display: grid; gap: 12px; font-size: 14px; }
.f-contact a { color: #cfe0f5; word-break: break-all; }
.f-contact a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .1); padding: 20px 0; font-size: 13px; display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; }
.footer-bottom a { color: #cfe0f5; }

/* ---------- Reveal ---------- */
.reveal { opacity: 0; transform: translateY(20px); }
.reveal.in { opacity: 1; transform: none; transition: opacity .7s ease, transform .7s ease; }
.no-anim .reveal, .no-anim.hero-card, .no-anim .hero-card { opacity: 1 !important; transform: none !important; transition: none !important; animation: none !important; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } .hero-card { animation: none; } }

/* ---------- Responsive ---------- */
@media (max-width: 1020px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4, .trust .container { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .feat-row { grid-template-columns: repeat(2, 1fr); }
  .detail-grid { columns: 2; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .hero .container { grid-template-columns: 1fr; padding-top: 64px; padding-bottom: 72px; }
  .hero-visual { min-height: 400px; max-width: 560px; }
  .pd-wrap, .about-grid, .contact-wrap { grid-template-columns: 1fr; }
}
@media (max-width: 860px) {
  .nav-links {
    position: fixed; inset: 0 0 0 auto; width: min(320px, 82vw); background: #fff; z-index: 70;
    flex-direction: column; align-items: flex-start; padding: 92px 30px 30px; gap: 8px;
    box-shadow: -20px 0 60px rgba(13, 38, 76, .18); transform: translateX(100%); transition: transform .28s ease;
  }
  .nav-links.open { transform: none; }
  .nav-links a { font-size: 17px; }
  .nav-burger { display: block; position: relative; z-index: 80; }
  .nav-cta .btn { display: none; }
  body.nav-open .nav-burger span:nth-child(1) { transform: translateY(7.6px) rotate(45deg); }
  body.nav-open .nav-burger span:nth-child(2) { opacity: 0; }
  body.nav-open .nav-burger span:nth-child(3) { transform: translateY(-7.6px) rotate(-45deg); }
  .topbar .tb-right span.hide-s { display: none; }
}
@media (max-width: 640px) {
  .section { padding: 60px 0; }
  .grid-3, .grid-2, .grid-4, .trust .container, .steps, .feat-row, .form-grid { grid-template-columns: 1fr; }
  .detail-grid { columns: 1; }
  .footer-top { grid-template-columns: 1fr; gap: 30px; }
  .cta-band { padding: 38px 28px; }
  .hero-stats { gap: 24px; }
  .hc-1 { width: 74%; } .hc-2 { width: 56%; } .hc-3 { width: 64%; left: 4%; }
  .trust-item b { font-size: 13.5px; }
}