/* 南京淼珏科技有限公司 · 官网样式
   云原生基础设施 · 宝蓝 + 暖金 配色 */

:root {
  --ink: #14306b;          /* 深靛蓝（深底） */
  --ink-2: #0f2452;        /* 更深 */
  --blue: #1d4ed8;         /* 宝蓝主色 */
  --blue-soft: #3b63e6;
  --gold: #f0b429;         /* 暖金强调 */
  --gold-2: #c9a14a;       /* 古金 */
  --ivory: #faf9f5;        /* 浅象牙底 */
  --paper: #ffffff;
  --line: #e7e3d8;
  --text: #1f2a44;
  --muted: #5b6680;
  --muted-light: #97a0b5;
  --radius: 14px;
  --radius-sm: 10px;
  --radius-lg: 20px;
  --shadow: 0 18px 50px rgba(20, 48, 107, .10);
  --shadow-sm: 0 8px 24px rgba(20, 48, 107, .08);
  --maxw: 1180px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--ivory);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { margin: 0; padding: 0; list-style: none; }

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

.sec { padding: 92px 0; }
.sec-head { max-width: 720px; margin: 0 auto 52px; text-align: center; }
.eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--blue);
  font-weight: 700;
  margin-bottom: 14px;
}
.eyebrow::before {
  content: "";
  display: inline-block;
  width: 22px; height: 2px;
  background: var(--gold);
  vertical-align: middle;
  margin-right: 10px;
}
.sec-title {
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1.25;
  margin: 0 0 16px;
  color: var(--ink);
  font-weight: 800;
  letter-spacing: -.01em;
}
.sec-sub { font-size: 16px; color: var(--muted); margin: 0; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 700;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s;
  white-space: nowrap;
}
.btn-primary {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 12px 28px rgba(29, 78, 216, .32);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 18px 36px rgba(29, 78, 216, .4); }
.btn-gold {
  background: linear-gradient(120deg, var(--gold), var(--gold-2));
  color: var(--ink-2);
  box-shadow: 0 12px 28px rgba(240, 180, 41, .35);
}
.btn-gold:hover { transform: translateY(-2px); box-shadow: 0 18px 36px rgba(240, 180, 41, .45); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--gold-2);
}
.btn-ghost:hover { background: rgba(201, 161, 74, .12); transform: translateY(-2px); }
.btn-outline-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, .4);
}
.btn-outline-light:hover { background: rgba(255, 255, 255, .12); }

/* ---------- 顶部导航 ---------- */
.masth {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(250, 249, 245, .88);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .3s;
}
.masth-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.masth-logo {
  display: flex;
  align-items: center;
  gap: 11px;
  font-weight: 800;
  font-size: 20px;
  color: var(--ink);
  letter-spacing: -.01em;
}
.masth-logo .mark {
  width: 34px; height: 34px;
  flex: 0 0 34px;
}
.masth-nav { display: flex; align-items: center; gap: 32px; }
.masth-nav a {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  position: relative;
  transition: color .2s;
}
.masth-nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -7px;
  width: 0; height: 2px;
  background: var(--gold);
  transition: width .28s var(--ease);
}
.masth-nav a:hover { color: var(--blue); }
.masth-nav a:hover::after { width: 100%; }
.masth-cta { display: flex; align-items: center; gap: 14px; }

.burger {
  display: none;
  width: 44px; height: 44px;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 11px;
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
}
.burger span {
  display: block;
  width: 20px; height: 2px;
  background: var(--ink);
  position: relative;
  transition: transform .3s, opacity .3s;
}
.burger span::before, .burger span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px; height: 2px;
  background: var(--ink);
  transition: transform .3s;
}
.burger span::before { top: -6px; }
.burger span::after { top: 6px; }
.burger.open span { background: transparent; }
.burger.open span::before { transform: translateY(6px) rotate(45deg); }
.burger.open span::after { transform: translateY(-6px) rotate(-45deg); }

/* 移动抽屉 —— 默认 hidden 隐藏 */
.drawer { display: none; }
.drawer:not([hidden]) {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 24px 28px;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 72px;
  z-index: 55;
}
.drawer a {
  padding: 13px 8px;
  font-size: 16px;
  font-weight: 600;
  border-bottom: 1px solid var(--line);
}
.drawer .btn { margin-top: 14px; justify-content: center; }

/* ---------- Hero / masth ---------- */
.stack-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(1100px 520px at 88% -8%, rgba(29, 78, 216, .10), transparent 60%),
    radial-gradient(800px 420px at 6% 110%, rgba(240, 180, 41, .10), transparent 55%);
}
.stack-grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 56px;
  align-items: center;
  padding: 84px 0 96px;
}
.stack-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(29, 78, 216, .08);
  border: 1px solid rgba(29, 78, 216, .18);
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
  padding: 7px 15px;
  border-radius: 999px;
  margin-bottom: 22px;
}
.stack-tag .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 0 4px rgba(240,180,41,.22); }
.stack-h1 {
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.12;
  letter-spacing: -.02em;
  margin: 0 0 22px;
  color: var(--ink);
  font-weight: 800;
}
.stack-h1 .hl { color: var(--blue); }
.stack-h1 .hl-gold {
  background: linear-gradient(120deg, var(--gold), var(--gold-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stack-lead {
  font-size: 18px;
  color: var(--muted);
  margin: 0 0 30px;
  max-width: 540px;
}
.stack-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 30px; }
.stack-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  font-size: 14px;
  color: var(--muted);
  font-weight: 600;
}
.stack-trust span { display: inline-flex; align-items: center; gap: 7px; }
.stack-trust svg { width: 17px; height: 17px; color: var(--blue); }

/* Hero 可视化：全球节点网络 */
.edge-viz {
  position: relative;
  aspect-ratio: 1 / 1;
  max-width: 480px;
  margin-left: auto;
  width: 100%;
}
.edge-svg { width: 100%; height: 100%; display: block; }
.edge-link { stroke: rgba(29, 78, 216, .28); stroke-width: 1.4; fill: none; }
.edge-arc { stroke: var(--gold); stroke-width: 1.6; fill: none; opacity: .55; stroke-dasharray: 4 6; }
.edge-node { fill: #fff; stroke: var(--blue); stroke-width: 2; }
.edge-node.core { fill: var(--blue); }
.pulse { transform-box: fill-box; transform-origin: center; animation: pulse 2.6s ease-out infinite; }
.pulse.b { animation-delay: 1.3s; }
.pulse.c { animation-delay: .7s; }
@keyframes pulse {
  0% { r: 5; opacity: .85; }
  70% { r: 22; opacity: 0; }
  100% { r: 22; opacity: 0; }
}
@media (prefers-reduced-motion: reduce) { .pulse { animation: none; opacity: 0; } }

/* 用量小卡片 */
.usage-card {
  position: absolute;
  left: -6px; bottom: 6px;
  width: 224px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px 18px;
}
.usage-card h4 {
  margin: 0 0 14px;
  font-size: 13px;
  color: var(--muted);
  font-weight: 700;
  display: flex; align-items: center; gap: 7px;
}
.usage-card h4 .live {
  width: 7px; height: 7px; border-radius: 50%;
  background: #28c76f;
  box-shadow: 0 0 0 3px rgba(40,199,111,.2);
  animation: blink 1.8s ease-in-out infinite;
}
@keyframes blink { 50% { opacity: .35; } }
.usage-row { margin-bottom: 12px; }
.usage-row:last-child { margin-bottom: 0; }
.usage-row .lbl {
  display: flex; justify-content: space-between;
  font-size: 12.5px; color: var(--text); font-weight: 600;
  margin-bottom: 6px;
}
.usage-row .lbl b { color: var(--blue); }
.bar { height: 7px; border-radius: 4px; background: #eef1f7; overflow: hidden; }
.bar i { display: block; height: 100%; border-radius: 4px; background: linear-gradient(90deg, var(--blue), var(--blue-soft)); }
.bar.gold i { background: linear-gradient(90deg, var(--gold-2), var(--gold)); }

/* ---------- 合规背书条 ---------- */
.assure-strip { background: var(--ink); }
.assure-strip .wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 18px;
  padding: 26px 24px;
}
.assure-item {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #e8edfb;
  font-size: 15px;
  font-weight: 600;
}
.assure-item svg { width: 24px; height: 24px; color: var(--gold); flex: 0 0 24px; }
.assure-item b { color: #fff; }
.assure-item small { display: block; font-size: 12.5px; color: #9fb0d8; font-weight: 500; }

/* ---------- 纵向选项卡 / 产品 ---------- */
.vtab-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 32px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.vtab-list {
  display: flex;
  flex-direction: column;
  padding: 16px;
  background: linear-gradient(180deg, #f7f6f0, #fbfaf6);
  border-right: 1px solid var(--line);
}
.vtab-btn {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  text-align: left;
  padding: 17px 18px;
  border: none;
  background: transparent;
  border-radius: 12px;
  cursor: pointer;
  font-family: inherit;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--text);
  transition: background .25s, color .25s, box-shadow .25s;
  position: relative;
}
.vtab-btn .vt-ico {
  width: 38px; height: 38px;
  flex: 0 0 38px;
  border-radius: 10px;
  display: grid; place-items: center;
  background: rgba(29, 78, 216, .08);
  color: var(--blue);
  transition: background .25s, color .25s;
}
.vtab-btn .vt-ico svg { width: 20px; height: 20px; }
.vtab-btn small { display: block; font-size: 12px; font-weight: 500; color: var(--muted-light); }
.vtab-btn[aria-selected="true"] {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 14px 30px rgba(29, 78, 216, .28);
}
.vtab-btn[aria-selected="true"] small { color: rgba(255,255,255,.75); }
.vtab-btn[aria-selected="true"] .vt-ico { background: rgba(255,255,255,.18); color: #fff; }
.vtab-btn:not([aria-selected="true"]):hover { background: rgba(29, 78, 216, .06); }

.vtab-panels { padding: 40px 44px; position: relative; }
.vtab-panel { display: none; }
.vtab-panel.is-active { display: grid; grid-template-columns: 1.15fr .85fr; gap: 36px; align-items: center; animation: fadeUp .5s var(--ease); }
@keyframes fadeUp { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
.vtab-panel h3 { font-size: 24px; color: var(--ink); margin: 0 0 6px; font-weight: 800; }
.vtab-kicker { color: var(--blue); font-size: 13px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; margin-bottom: 12px; }
.vtab-panel p { color: var(--muted); margin: 0 0 22px; font-size: 15.5px; }
.vtab-feats { display: grid; gap: 12px; }
.vtab-feats li { display: flex; gap: 11px; font-size: 14.5px; color: var(--text); font-weight: 500; }
.vtab-feats li svg { width: 19px; height: 19px; color: var(--gold-2); flex: 0 0 19px; margin-top: 2px; }
.vtab-illus {
  border-radius: var(--radius);
  background: linear-gradient(155deg, #eef2fc, #f8f5ec);
  border: 1px solid var(--line);
  padding: 20px;
  aspect-ratio: 4 / 3;
  display: grid;
  place-items: center;
}
.vtab-illus svg { width: 100%; height: 100%; }

/* ---------- 技术能力网格 ---------- */
.biz-tech { background: var(--paper); }
.cap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.cap-card {
  background: var(--ivory);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 26px;
  transition: transform .3s var(--ease), box-shadow .3s, border-color .3s;
}
.cap-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: rgba(29,78,216,.25); }
.cap-ico {
  width: 50px; height: 50px;
  border-radius: 13px;
  background: linear-gradient(135deg, var(--blue), var(--ink));
  color: #fff;
  display: grid; place-items: center;
  margin-bottom: 18px;
}
.cap-ico svg { width: 25px; height: 25px; }
.cap-card h3 { margin: 0 0 8px; font-size: 18px; color: var(--ink); font-weight: 700; }
.cap-card p { margin: 0; font-size: 14.5px; color: var(--muted); }

/* ---------- 行业应用 ---------- */
.app-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}
.app-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 22px;
  text-align: center;
  transition: transform .3s var(--ease), box-shadow .3s;
}
.app-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.app-ico {
  width: 46px; height: 46px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: rgba(240, 180, 41, .14);
  color: var(--gold-2);
  display: grid; place-items: center;
}
.app-ico svg { width: 24px; height: 24px; }
.app-card h3 { margin: 0 0 8px; font-size: 17px; color: var(--ink); font-weight: 700; }
.app-card p { margin: 0; font-size: 13.5px; color: var(--muted); line-height: 1.6; }

/* ---------- 安全与容灾（深色） ---------- */
.assure-deep {
  background:
    radial-gradient(900px 500px at 85% 0%, rgba(29, 78, 216, .32), transparent 55%),
    linear-gradient(160deg, var(--ink), var(--ink-2));
  color: #eef2fc;
}
.assure-deep .sec-title { color: #fff; }
.assure-deep .eyebrow { color: var(--gold); }
.assure-deep .sec-sub { color: #aebbe0; }
.assure-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.assure-block {
  display: flex;
  gap: 18px;
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: var(--radius);
  padding: 26px 24px;
  transition: background .3s, border-color .3s;
}
.assure-block:hover { background: rgba(255,255,255,.07); border-color: rgba(240,180,41,.35); }
.assure-block .ab-ico {
  width: 46px; height: 46px;
  flex: 0 0 46px;
  border-radius: 12px;
  background: rgba(240, 180, 41, .15);
  color: var(--gold);
  display: grid; place-items: center;
}
.assure-block .ab-ico svg { width: 24px; height: 24px; }
.assure-block h3 { margin: 0 0 7px; font-size: 18px; color: #fff; font-weight: 700; }
.assure-block p { margin: 0; font-size: 14px; color: #aebbe0; }

/* ---------- 数据成果横幅 ---------- */
.stat-band {
  background: linear-gradient(120deg, var(--ink-2), var(--blue));
  color: #fff;
  position: relative;
  overflow: hidden;
}
.stat-band::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(600px 300px at 15% 120%, rgba(240,180,41,.18), transparent 60%);
}
.stat-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stat-item .num {
  font-size: clamp(34px, 4.2vw, 50px);
  font-weight: 800;
  line-height: 1;
  background: linear-gradient(120deg, var(--gold), #ffe08a);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -.02em;
}
.stat-item .num .suf { font-size: .55em; margin-left: 2px; }
.stat-item .lbl { margin-top: 12px; font-size: 15px; color: #c5d2f3; font-weight: 600; }

/* ---------- 关于淼珏 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 52px;
  align-items: center;
}
.about-copy .eyebrow { text-align: left; }
.about-copy p { color: var(--muted); font-size: 16px; margin: 0 0 18px; }
.about-points { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 26px; }
.about-points li {
  display: flex; gap: 12px;
  font-size: 15px; font-weight: 600; color: var(--text);
}
.about-points svg { width: 22px; height: 22px; color: var(--blue); flex: 0 0 22px; margin-top: 1px; }
.about-visual {
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, #eef2fc, #f8f5ec);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  padding: 34px;
  display: grid;
  place-items: center;
  aspect-ratio: 1 / 1;
}
.about-visual svg { width: 100%; height: 100%; }

/* ---------- 联系我们 ---------- */
.contact-card {
  background:
    radial-gradient(700px 380px at 90% -10%, rgba(29, 78, 216, .3), transparent 55%),
    linear-gradient(150deg, var(--ink), var(--ink-2));
  border-radius: var(--radius-lg);
  padding: 56px 52px;
  color: #fff;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 44px;
  align-items: center;
  box-shadow: var(--shadow);
}
.contact-card .eyebrow { color: var(--gold); text-align: left; }
.contact-card h2 { font-size: clamp(26px, 3vw, 34px); margin: 0 0 14px; font-weight: 800; }
.contact-card .lead { color: #b9c6ea; font-size: 16px; margin: 0 0 26px; }
.contact-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.contact-info { display: grid; gap: 18px; }
.contact-row { display: flex; gap: 14px; align-items: flex-start; }
.contact-row .ci-ico {
  width: 42px; height: 42px; flex: 0 0 42px;
  border-radius: 11px;
  background: rgba(255, 255, 255, .08);
  color: var(--gold);
  display: grid; place-items: center;
}
.contact-row .ci-ico svg { width: 21px; height: 21px; }
.contact-row .ci-lbl { font-size: 12.5px; color: #9fb0d8; margin-bottom: 3px; }
.contact-row .ci-val { font-size: 15.5px; color: #fff; font-weight: 600; word-break: break-all; }

/* ---------- 页脚 ---------- */
.foot { background: var(--ink-2); color: #c5d2f3; padding: 64px 0 0; }
.foot-top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 36px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
}
.foot-brand .masth-logo { color: #fff; font-size: 22px; margin-bottom: 16px; }
.foot-brand p { font-size: 14px; color: #93a3cc; max-width: 320px; margin: 0; }
.foot-col h4 { font-size: 14px; color: #fff; margin: 0 0 18px; font-weight: 700; letter-spacing: .04em; }
.foot-col li { margin-bottom: 12px; }
.foot-col a { font-size: 14px; color: #aebbe0; transition: color .2s; }
.foot-col a:hover { color: var(--gold); }
.foot-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding: 24px 0 30px;
  font-size: 13px;
  color: #8295c0;
}
.foot-bottom a { color: #8295c0; transition: color .2s; }
.foot-bottom a:hover { color: var(--gold); }

/* ---------- 进场动画 ---------- */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .sec { padding: 72px 0; }
  .stack-grid { grid-template-columns: 1fr; gap: 40px; padding: 56px 0 70px; }
  .edge-viz { max-width: 420px; margin: 0 auto; }
  .vtab-grid { grid-template-columns: 1fr; }
  .vtab-list { flex-direction: row; overflow-x: auto; border-right: none; border-bottom: 1px solid var(--line); gap: 10px; }
  .vtab-btn { flex: 0 0 auto; min-width: 200px; }
  .vtab-panel.is-active { grid-template-columns: 1fr; }
  .vtab-panels { padding: 32px 28px; }
  .cap-grid { grid-template-columns: repeat(2, 1fr); }
  .app-grid { grid-template-columns: repeat(3, 1fr); }
  .assure-list { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: 36px; }
  .about-visual { max-width: 420px; margin: 0 auto; }
  .contact-card { grid-template-columns: 1fr; padding: 40px 32px; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); gap: 36px 24px; }
  .foot-top { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 720px) {
  .masth-nav, .masth-cta .btn { display: none; }
  .burger { display: inline-flex; }
  .assure-strip .wrap { flex-direction: column; align-items: flex-start; gap: 16px; }
  .cap-grid { grid-template-columns: 1fr; }
  .app-grid { grid-template-columns: repeat(2, 1fr); }
  .about-points { grid-template-columns: 1fr; }
  .usage-card { width: 190px; left: 0; bottom: 0; }
}

@media (max-width: 460px) {
  .wrap { padding: 0 18px; }
  .stack-actions .btn { flex: 1 1 100%; justify-content: center; }
  .app-grid { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: 1fr; }
  .foot-top { grid-template-columns: 1fr; }
  .vtab-btn { min-width: 170px; }
}