/* ══════════════════════════════════════════════
   无界教育官网 · 纸感浅色 + 极光渐变 + 编辑排版
   ══════════════════════════════════════════════ */

:root {
  --paper: #f7f8fc;
  --ink: #0f1729;
  --muted: #5a6478;
  --line: rgba(15, 23, 41, 0.08);
  --blue: #2563eb;
  --cyan: #0891b2;
  --violet: #7c3aed;
  --glass: rgba(255, 255, 255, 0.62);
  --glass-border: rgba(255, 255, 255, 0.75);
  --shadow: 0 24px 64px -24px rgba(15, 23, 41, 0.18);
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  --radius: 22px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  background: var(--paper);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── 极光背景 ── */
.aurora {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(42% 38% at 12% 8%, rgba(37, 99, 235, 0.10), transparent 70%),
    radial-gradient(38% 34% at 88% 12%, rgba(8, 145, 178, 0.10), transparent 70%),
    radial-gradient(46% 40% at 50% 105%, rgba(124, 58, 237, 0.07), transparent 70%);
  animation: aurora-shift 24s ease-in-out infinite alternate;
}
@keyframes aurora-shift {
  from { transform: translateY(0) scale(1); }
  to   { transform: translateY(-3%) scale(1.05); }
}
/* 细网格纸纹 */
.gridpaper {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(15, 23, 41, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 41, 0.025) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(180deg, #000 0%, transparent 42%, transparent 70%, #000 100%);
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 42%, transparent 70%, #000 100%);
}

::selection { background: rgba(37, 99, 235, 0.18); }

a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 28px; }

/* ══ 顶栏 ══ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  background: rgba(247, 248, 252, 0.72);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: 36px;
  height: 68px;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.02em;
}
.brand .mark {
  display: inline-grid;
  place-items: center;
  width: 34px; height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  color: #fff;
  font-size: 15px;
  font-weight: 800;
  transform: translateY(6px);
  box-shadow: 0 8px 20px -8px rgba(37, 99, 235, 0.55);
}
.brand .en {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.nav-links {
  display: flex;
  gap: 30px;
  margin-left: auto;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--muted);
}
.nav-links a { transition: color 0.2s; padding: 6px 0; }
.nav-links a:hover, .nav-links a.on { color: var(--ink); }
.nav-cta {
  padding: 9px 22px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff !important;
  font-size: 13.5px;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 10px 26px -12px rgba(15, 23, 41, 0.5);
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 14px 30px -12px rgba(15, 23, 41, 0.55); }

/* ══ Hero ══ */
.hero {
  position: relative;
  padding: 172px 0 110px;
}
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--blue);
  border: 1px solid rgba(37, 99, 235, 0.25);
  background: rgba(37, 99, 235, 0.06);
  border-radius: 999px;
  padding: 7px 18px;
  margin-bottom: 34px;
}
.kicker .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--blue);
  animation: pulse 2.2s infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.35); }
  50% { box-shadow: 0 0 0 7px rgba(37, 99, 235, 0); }
}
.hero h1 {
  font-size: clamp(44px, 7.2vw, 84px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: 0.01em;
  max-width: 15em;
}
.hero h1 .grad {
  background: linear-gradient(100deg, var(--blue) 10%, var(--cyan) 55%, var(--violet) 95%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero .sub {
  margin-top: 30px;
  font-size: 18px;
  color: var(--muted);
  max-width: 39em;
}
.hero .sub strong { color: var(--ink); font-weight: 600; }
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 46px;
}
.btn-primary, .btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 34px;
  border-radius: 999px;
  font-size: 15.5px;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn-primary {
  background: linear-gradient(120deg, var(--blue), var(--cyan));
  color: #fff;
  box-shadow: 0 18px 40px -14px rgba(37, 99, 235, 0.55);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 24px 48px -14px rgba(37, 99, 235, 0.6); }
.btn-ghost {
  background: var(--glass);
  border: 1px solid var(--line);
  backdrop-filter: blur(10px);
}
.btn-ghost:hover { transform: translateY(-3px); background: #fff; }
.btn-primary svg, .btn-ghost svg { width: 17px; height: 17px; }

/* Hero 侧竖排标 */
.v-label {
  position: absolute;
  right: 30px;
  top: 186px;
  writing-mode: vertical-rl;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.5em;
  color: rgba(15, 23, 41, 0.28);
  border-left: 1px solid var(--line);
  padding-left: 14px;
}

/* 关键词跑马灯 */
.marquee {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 17px 0;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.45);
  white-space: nowrap;
}
.marquee-track {
  display: inline-flex;
  gap: 54px;
  animation: scroll-x 36s linear infinite;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--muted);
}
.marquee-track span::before {
  content: "◆";
  margin-right: 54px;
  font-size: 8px;
  color: rgba(37, 99, 235, 0.5);
  vertical-align: 2px;
}
@keyframes scroll-x { to { transform: translateX(-50%); } }

/* ══ 通用 Section ══ */
section.block { position: relative; padding: 108px 0; }
.sec-head { margin-bottom: 58px; position: relative; }
.sec-head .idx {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.3em;
  color: var(--blue);
  display: block;
  margin-bottom: 14px;
}
.sec-head h2 {
  font-size: clamp(30px, 4.4vw, 46px);
  font-weight: 800;
  letter-spacing: 0.01em;
  line-height: 1.25;
}
.sec-head .desc {
  margin-top: 16px;
  color: var(--muted);
  max-width: 44em;
  font-size: 16.5px;
}
/* 巨型描边水印 */
.watermark {
  position: absolute;
  right: -0.05em;
  top: -46px;
  font-size: clamp(120px, 19vw, 230px);
  font-weight: 900;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(15, 23, 41, 0.055);
  pointer-events: none;
  user-select: none;
  z-index: -1;
  white-space: nowrap;
}

/* ══ 玻璃卡片 ══ */
.glass-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  backdrop-filter: blur(16px) saturate(1.3);
  -webkit-backdrop-filter: blur(16px) saturate(1.3);
  box-shadow: 0 2px 10px -4px rgba(15, 23, 41, 0.06);
  transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.28s;
}
.glass-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }

/* ══ 双轨（C端/B端）══ */
.tracks {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px;
}
.track {
  padding: 42px 40px;
  position: relative;
  overflow: hidden;
}
.track::after {
  content: attr(data-tag);
  position: absolute;
  top: 26px; right: 28px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: rgba(15, 23, 41, 0.32);
}
.track .t-ico {
  width: 52px; height: 52px;
  border-radius: 15px;
  display: grid;
  place-items: center;
  margin-bottom: 24px;
  color: #fff;
}
.track .t-ico svg { width: 25px; height: 25px; }
.track.c .t-ico { background: linear-gradient(135deg, var(--blue), var(--cyan)); box-shadow: 0 12px 26px -10px rgba(37, 99, 235, 0.5); }
.track.b .t-ico { background: linear-gradient(135deg, #0f1729, #3b4763); box-shadow: 0 12px 26px -10px rgba(15, 23, 41, 0.5); }
.track h3 { font-size: 24px; font-weight: 800; margin-bottom: 8px; }
.track .t-sub { color: var(--muted); font-size: 15px; margin-bottom: 26px; }
.track li {
  display: flex;
  gap: 12px;
  padding: 13px 0;
  border-top: 1px dashed var(--line);
  font-size: 15px;
}
.track li b { font-weight: 600; }
.track li .li-note { color: var(--muted); font-size: 13.5px; display: block; }
.track li svg { width: 18px; height: 18px; flex: none; margin-top: 4px; color: var(--blue); }
.track.b li svg { color: #3b4763; }

/* ══ 课程阶梯 ══ */
.ladder { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; align-items: end; }
.rung { padding: 30px 26px; position: relative; }
.rung .price {
  font-family: var(--mono);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.rung .price small { font-size: 13px; color: var(--muted); font-weight: 400; }
.rung h4 { font-size: 17px; font-weight: 700; margin: 10px 0 8px; }
.rung p { font-size: 13.5px; color: var(--muted); }
.rung .stage {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--blue);
  display: block;
  margin-bottom: 14px;
}
.rung:nth-child(1) { min-height: 210px; }
.rung:nth-child(2) { min-height: 240px; }
.rung:nth-child(3) { min-height: 270px; }
.rung:nth-child(4) { min-height: 300px; border: 1.5px solid rgba(37, 99, 235, 0.35); }
.rung:nth-child(4)::before {
  content: "核心利润带";
  position: absolute;
  top: -12px; left: 24px;
  font-size: 11px;
  padding: 3px 12px;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--blue), var(--cyan));
  color: #fff;
  letter-spacing: 0.1em;
}
.ladder-note {
  margin-top: 26px;
  font-size: 13.5px;
  color: var(--muted);
  font-family: var(--mono);
  letter-spacing: 0.04em;
}

/* ══ 企业服务 ══ */
.biz-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.biz {
  padding: 32px 28px;
}
.biz .num {
  font-family: var(--mono);
  font-size: 13px;
  color: rgba(15, 23, 41, 0.3);
  letter-spacing: 0.15em;
  display: block;
  margin-bottom: 18px;
}
.biz h4 { font-size: 18.5px; font-weight: 700; margin-bottom: 10px; }
.biz p { font-size: 14px; color: var(--muted); }
.biz .range {
  margin-top: 20px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--blue);
  border-top: 1px dashed var(--line);
  padding-top: 14px;
}

/* ══ 平台板块 ══ */
.platform-band {
  position: relative;
  border-radius: 30px;
  overflow: hidden;
  background: linear-gradient(130deg, #0d1526 0%, #12203e 55%, #101a33 100%);
  color: #eef2fb;
  padding: 72px 64px;
  box-shadow: 0 40px 90px -30px rgba(13, 21, 38, 0.55);
}
.platform-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(48% 60% at 85% 20%, rgba(8, 145, 178, 0.22), transparent 70%),
    radial-gradient(40% 55% at 8% 90%, rgba(124, 58, 237, 0.18), transparent 70%);
  pointer-events: none;
}
.platform-band .pb-inner { position: relative; display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center; }
.platform-band .pb-kicker {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: #67e8f9;
  margin-bottom: 20px;
  display: block;
}
.platform-band h2 { font-size: clamp(28px, 3.6vw, 40px); font-weight: 800; line-height: 1.3; }
.platform-band .pb-desc { margin-top: 18px; color: rgba(238, 242, 251, 0.72); font-size: 16px; max-width: 34em; }
.pb-feats { margin-top: 30px; display: grid; grid-template-columns: 1fr 1fr; gap: 12px 26px; }
.pb-feats li { display: flex; gap: 10px; font-size: 14.5px; color: rgba(238, 242, 251, 0.85); }
.pb-feats svg { width: 16px; height: 16px; flex: none; margin-top: 5px; color: #67e8f9; }
.pb-actions { margin-top: 40px; display: flex; gap: 16px; flex-wrap: wrap; }
.pb-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  transition: transform 0.2s;
}
.pb-btn.solid { background: #fff; color: #0d1526; }
.pb-btn.line { border: 1px solid rgba(255, 255, 255, 0.3); color: #fff; }
.pb-btn:hover { transform: translateY(-3px); }
.pb-btn svg { width: 16px; height: 16px; }

/* 平台模拟窗口 */
.mock {
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(8px);
  overflow: hidden;
  box-shadow: 0 30px 70px -24px rgba(0, 0, 0, 0.55);
  transform: rotate(1.2deg);
}
.mock-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 13px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.mock-bar i { width: 11px; height: 11px; border-radius: 50%; display: block; }
.mock-bar i:nth-child(1) { background: #f87171; }
.mock-bar i:nth-child(2) { background: #fbbf24; }
.mock-bar i:nth-child(3) { background: #34d399; }
.mock-bar .url {
  margin-left: 12px;
  font-family: var(--mono);
  font-size: 11.5px;
  color: rgba(238, 242, 251, 0.55);
  background: rgba(255, 255, 255, 0.07);
  border-radius: 7px;
  padding: 4px 14px;
}
.mock-body { display: grid; grid-template-columns: 118px 1fr; min-height: 260px; }
.mock-side { border-right: 1px solid rgba(255, 255, 255, 0.1); padding: 16px 12px; }
.mock-side .mi {
  height: 11px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.14);
  margin-bottom: 12px;
}
.mock-side .mi.on { background: linear-gradient(90deg, #2563eb, #06b6d4); }
.mock-side .mi:nth-child(2) { width: 82%; }
.mock-side .mi:nth-child(3) { width: 68%; }
.mock-side .mi:nth-child(5) { width: 75%; }
.mock-side .mi:nth-child(6) { width: 60%; }
.mock-main { padding: 20px; }
.mock-main .mh {
  height: 16px; width: 45%;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.2);
  margin-bottom: 16px;
}
.mock-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.mock-cards .mc {
  height: 64px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.mock-cards .mc:first-child { background: linear-gradient(135deg, rgba(37, 99, 235, 0.4), rgba(6, 182, 212, 0.3)); }
.mock-chart {
  margin-top: 12px;
  height: 84px;
  border-radius: 10px;
  background:
    linear-gradient(180deg, transparent 62%, rgba(103, 232, 249, 0.16) 62%),
    rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
  overflow: hidden;
}
.mock-chart::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, transparent 30%, rgba(103, 232, 249, 0.25) 50%, transparent 70%);
  animation: sheen 3.4s ease-in-out infinite;
}
@keyframes sheen { 0% { transform: translateX(-100%); } 60%, 100% { transform: translateX(100%); } }

/* ══ 理念四条 ══ */
.creed { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.creed-item { padding: 30px 26px; }
.creed-item .no {
  font-family: var(--mono);
  font-size: 30px;
  font-weight: 700;
  background: linear-gradient(120deg, var(--blue), var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: block;
  margin-bottom: 14px;
}
.creed-item h4 { font-size: 16.5px; font-weight: 700; margin-bottom: 8px; }
.creed-item p { font-size: 13.5px; color: var(--muted); }

/* ══ 关于 ══ */
.about-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 60px; align-items: start; }
.about-grid .lead { font-size: 19px; line-height: 2; }
.about-grid .lead strong { font-weight: 700; }
.stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.stat {
  padding: 26px 24px;
}
.stat .v {
  font-family: var(--mono);
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.stat .v em { font-style: normal; font-size: 16px; color: var(--blue); }
.stat .k { font-size: 13px; color: var(--muted); margin-top: 6px; }

/* ══ CTA 尾章 ══ */
.final-cta {
  text-align: center;
  padding: 120px 0 130px;
}
.final-cta h2 { font-size: clamp(32px, 5vw, 54px); font-weight: 900; line-height: 1.3; }
.final-cta p { margin-top: 18px; color: var(--muted); font-size: 17px; }
.final-cta .hero-actions { justify-content: center; }

/* ══ 页脚 ══ */
footer {
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.5);
  padding: 54px 0 40px;
  font-size: 13.5px;
  color: var(--muted);
}
.foot-grid { display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.foot-brand { font-weight: 800; font-size: 17px; color: var(--ink); margin-bottom: 10px; }
.foot-links { display: flex; gap: 26px; }
.foot-links a:hover { color: var(--ink); }
.foot-legal {
  margin-top: 34px;
  padding-top: 22px;
  border-top: 1px dashed var(--line);
  font-size: 12.5px;
  color: rgba(90, 100, 120, 0.75);
  line-height: 2;
}

/* ══ 滚动浮现 ══ */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 1, 0.36, 1); }
.reveal.in { opacity: 1; transform: none; }

/* ══ 平台介绍页专用 ══ */
.page-hero { padding: 168px 0 72px; }
.page-hero h1 { font-size: clamp(36px, 5.6vw, 62px); font-weight: 900; line-height: 1.2; }
.page-hero .sub { margin-top: 22px; color: var(--muted); font-size: 17.5px; max-width: 42em; }

.mod-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.mod {
  padding: 38px 36px;
  position: relative;
}
.mod .m-tag {
  position: absolute;
  top: 30px; right: 30px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: rgba(15, 23, 41, 0.3);
}
.mod .m-ico {
  width: 46px; height: 46px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  color: #fff;
  margin-bottom: 20px;
}
.mod .m-ico svg { width: 22px; height: 22px; }
.mod h3 { font-size: 20px; font-weight: 800; margin-bottom: 6px; }
.mod .m-sub { color: var(--muted); font-size: 14px; margin-bottom: 20px; }
.mod .feats { display: flex; flex-wrap: wrap; gap: 8px; }
.mod .feats span {
  font-size: 12.5px;
  padding: 5px 13px;
  border-radius: 999px;
  background: rgba(15, 23, 41, 0.045);
  border: 1px solid var(--line);
  color: var(--muted);
}
.mod .feats span.hi {
  background: rgba(37, 99, 235, 0.08);
  border-color: rgba(37, 99, 235, 0.22);
  color: var(--blue);
  font-weight: 600;
}

/* 流程横条 */
.flow {
  display: flex;
  align-items: stretch;
  gap: 0;
  overflow-x: auto;
  padding-bottom: 8px;
}
.flow-step {
  flex: 1;
  min-width: 150px;
  padding: 26px 22px;
  border: 1px solid var(--line);
  border-right: none;
  background: var(--glass);
  backdrop-filter: blur(10px);
  position: relative;
}
.flow-step:first-child { border-radius: 16px 0 0 16px; }
.flow-step:last-child { border-right: 1px solid var(--line); border-radius: 0 16px 16px 0; }
.flow-step .f-no {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--blue);
  letter-spacing: 0.2em;
  display: block;
  margin-bottom: 10px;
}
.flow-step h5 { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.flow-step p { font-size: 12.5px; color: var(--muted); }

/* ══ 响应式 ══ */
@media (max-width: 960px) {
  .tracks, .about-grid, .mod-grid, .platform-band .pb-inner { grid-template-columns: 1fr; }
  .ladder, .biz-grid, .creed { grid-template-columns: 1fr 1fr; }
  .rung { min-height: 0 !important; }
  .v-label { display: none; }
  .nav-links { display: none; }
  .platform-band { padding: 48px 30px; }
  .watermark { font-size: 110px; top: -20px; }
}
@media (max-width: 560px) {
  .ladder, .biz-grid, .creed, .stat-grid, .pb-feats { grid-template-columns: 1fr; }
  section.block { padding: 72px 0; }
  .hero { padding: 130px 0 80px; }
}