:root {
  --ink:#14213a;
  --navy:#183a86;
  --blue:#3569d4;
  --cyan:#63d6e8;
  --muted:#65748b;
  --line:#e0e8f2;
  --soft:#f3f8fd;
  --shadow:0 16px 42px rgba(23,55,103,.09);
  --radius:21px;
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}

*,
*::before,
*::after {
  box-sizing:border-box;
}

html {
  scroll-behavior:smooth;
}

body {
  margin:0;
  color:var(--ink);
  background:#fff;
  line-height:1.7;
}

a {
  color:inherit;
}

img {
  display:block;
  max-width:100%;
  height:auto;
}

.site {
  overflow:hidden;
}

.container {
  width:min(1160px,calc(100% - 40px));
  margin:0 auto;
}

.hero {
  margin-top:17px;
  padding:58px 56px;
  border:1px solid #dce8f5;
  border-radius:28px;
  background:
    radial-gradient(circle at 90% 10%,rgba(99,214,232,.30),transparent 25%),
    linear-gradient(135deg,#f4f9ff,#eef5fb 60%,#fbfdff);
}

.hero-grid {
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(360px,.95fr);
  align-items:center;
  gap:55px;
}

.eyebrow,
.kicker {
  margin:0 0 14px;
  color:var(--blue);
  font-size:11px;
  font-weight:900;
  letter-spacing:.16em;
  text-transform:uppercase;
}

.eyebrow::before {
  content:"";
  display:inline-block;
  width:22px;
  height:2px;
  margin:0 9px 4px 0;
  background:var(--cyan);
}

h1,
h2,
h3 {
  margin:0;
  color:var(--navy);
  line-height:1.12;
  letter-spacing:-.035em;
}

h1 {
  max-width:760px;
  font-size:clamp(34px,5.1vw,61px);
}

h2 {
  margin-bottom:14px;
  font-size:clamp(28px,3.7vw,43px);
}

h3 {
  font-size:20px;
}

p {
  margin:0;
  color:var(--muted);
}

.hero-intro {
  max-width:650px;
  margin-top:23px;
  font-size:17px;
}

.hero-points {
  display:flex;
  flex-wrap:wrap;
  gap:9px;
  margin:27px 0 0;
  padding:0;
  list-style:none;
}

.hero-points li {
  padding:8px 12px;
  border:1px solid #d2dfed;
  border-radius:999px;
  color:var(--navy);
  background:rgba(255,255,255,.74);
  font-size:12px;
  font-weight:800;
}

.hero-actions {
  display:flex;
  flex-wrap:wrap;
  gap:11px;
  margin-top:28px;
}

.button {
  display:inline-flex;
  min-height:47px;
  align-items:center;
  justify-content:center;
  padding:11px 18px;
  border-radius:9px;
  text-decoration:none;
  font-size:13px;
  font-weight:850;
}

.button-primary {
  color:#fff;
  background:var(--blue);
  box-shadow:0 10px 22px rgba(53,105,212,.22);
}

.button-light {
  border:1px solid #cbd8e8;
  color:var(--navy);
  background:#fff;
}

.hero-figure {
  position:relative;
  margin:0;
  padding:14px;
  border:1px solid rgba(255,255,255,.95);
  border-radius:23px;
  background:rgba(255,255,255,.82);
  box-shadow:var(--shadow);
}

.hero-figure img {
  width:100%;
  aspect-ratio:1 / 1;
  object-fit:contain;
  border-radius:14px;
}

.hero-figure figcaption,
.image-card figcaption {
  color:#7b8798;
  font-size:11px;
}

.hero-figure figcaption {
  margin:11px 5px 2px;
}

.intro {
  padding:65px 0 28px;
}

.intro-grid {
  display:grid;
  grid-template-columns:minmax(0,1.45fr) minmax(250px,.55fr);
  gap:35px;
  align-items:start;
}

.article-copy {
  max-width:780px;
}

.article-copy p {
  margin-bottom:18px;
  font-size:16px;
}

.article-copy strong {
  color:var(--navy);
}

.article-copy a {
  color:var(--blue);
  font-weight:800;
}

.toc {
  position:sticky;
  top:20px;
  padding:22px;
  border:1px solid var(--line);
  border-radius:16px;
  background:#fff;
  box-shadow:0 10px 25px rgba(25,50,90,.045);
}

.toc strong {
  display:block;
  margin-bottom:12px;
  color:var(--navy);
  font-size:13px;
}

.toc ol {
  display:grid;
  gap:8px;
  margin:0;
  padding-left:18px;
  color:#68778e;
  font-size:12px;
}

.section {
  padding:75px 0;
}

.section-soft {
  background:var(--soft);
}

.section-head {
  max-width:770px;
  margin:0 auto 37px;
  text-align:center;
}

.section-head p {
  font-size:15px;
}

.card-grid {
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:17px;
}

.card,
.buy-card {
  border:1px solid var(--line);
  background:#fff;
}

.card {
  padding:25px;
  border-radius:var(--radius);
  box-shadow:0 10px 25px rgba(25,50,90,.035);
}

.card-number {
  display:grid;
  width:38px;
  height:38px;
  place-items:center;
  margin-bottom:16px;
  border-radius:12px;
  color:var(--navy);
  background:#e8f3ff;
  font-size:13px;
  font-weight:900;
}

.card h3 {
  margin-bottom:9px;
  font-size:18px;
}

.card p {
  font-size:13px;
}

.split {
  display:grid;
  grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);
  align-items:center;
  gap:52px;
}

.split-copy p {
  margin-bottom:17px;
  font-size:15px;
}

.check-list {
  display:grid;
  gap:10px;
  margin:21px 0 0;
  padding:0;
  list-style:none;
}

.check-list li {
  position:relative;
  padding-left:29px;
  color:#43536c;
  font-size:14px;
}

.check-list li::before {
  content:"✓";
  position:absolute;
  left:0;
  top:2px;
  display:grid;
  width:19px;
  height:19px;
  place-items:center;
  border-radius:50%;
  color:#fff;
  background:var(--blue);
  font-size:11px;
  font-weight:900;
}

.image-card {
  margin:0;
  padding:12px;
  border:1px solid var(--line);
  border-radius:21px;
  background:#fff;
  box-shadow:var(--shadow);
}

.image-card img {
  width:100%;
  aspect-ratio:1 / 1;
  object-fit:contain;
  border-radius:13px;
  background:#f8fbfe;
}

.image-card figcaption {
  padding:10px 8px 2px;
}

.spec-wrap {
  overflow-x:auto;
  border:1px solid var(--line);
  border-radius:17px;
  background:#fff;
}

.spec-table {
  width:100%;
  min-width:640px;
  border-collapse:collapse;
}

.spec-table th,
.spec-table td {
  padding:14px 18px;
  border-bottom:1px solid #e8edf3;
  text-align:left;
  vertical-align:top;
}

.spec-table th {
  width:33%;
  color:#344765;
  background:#f7fafe;
  font-size:13px;
}

.spec-table td {
  color:var(--muted);
  font-size:13px;
}

.note {
  margin-top:18px;
  padding:15px 18px;
  border-left:3px solid var(--cyan);
  border-radius:0 10px 10px 0;
  color:#596a82;
  background:#f7fbfd;
  font-size:12px;
}

.steps,
.buy-grid {
  display:grid;
  gap:15px;
}

.steps {
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:13px;
}

.step {
  padding:22px;
  border-top:3px solid var(--blue);
  border-radius:0 0 15px 15px;
  background:#fff;
  box-shadow:0 10px 24px rgba(25,50,90,.04);
}

.step strong {
  display:block;
  margin-bottom:8px;
  color:var(--blue);
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
}

.step h3 {
  margin-bottom:8px;
  font-size:17px;
}

.step p {
  font-size:13px;
}

.buy-grid {
  grid-template-columns:repeat(3,minmax(0,1fr));
}

.buy-card {
  padding:22px;
  border-radius:15px;
}

.buy-card h3 {
  margin-bottom:8px;
  font-size:17px;
}

.buy-card p {
  font-size:13px;
}

.faq {
  max-width:900px;
  margin:0 auto;
}

.faq details {
  margin-bottom:10px;
  border:1px solid var(--line);
  border-radius:13px;
  background:#fff;
}

.faq summary {
  position:relative;
  padding:16px 45px 16px 18px;
  cursor:pointer;
  color:var(--navy);
  font-size:14px;
  font-weight:800;
  list-style:none;
}

.answer {
  padding:0 18px 17px;
  color:var(--muted);
  font-size:13px;
}

.answer p {
  margin:0;
}

.cta {
  padding:58px 0 75px;
}

.cta-box {
  padding:48px 30px;
  border-radius:23px;
  color:#fff;
  background:linear-gradient(120deg,#142b60,#2c61c4 70%,#3d79dd);
  text-align:center;
}

.cta-box h2 {
  color:#fff;
}

.cta-box p {
  max-width:720px;
  margin:0 auto 23px;
  color:#e0ebfc;
}

footer {
  padding:24px 0 33px;
  border-top:1px solid var(--line);
  color:#7a8799;
  font-size:11px;
}

.footer-inner {
  display:flex;
  justify-content:space-between;
  gap:20px;
}

@media (max-width:900px) {
  .hero {
    padding:38px 31px;
  }

  .hero-grid {
    grid-template-columns:1fr 1fr;
    gap:28px;
  }

  .intro-grid {
    grid-template-columns:1fr;
  }

  .toc {
    position:static;
  }

  .card-grid {
    grid-template-columns:repeat(2,minmax(0,1fr));
  }

  .split {
    gap:28px;
  }

  .steps {
    grid-template-columns:repeat(2,minmax(0,1fr));
  }

  .buy-grid {
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
}

@media (max-width:650px) {
  .container {
    width:min(100% - 28px,1160px);
  }

  .hero {
    margin-top:12px;
    padding:27px 18px;
    border-radius:20px;
  }

  .hero-grid,
  .split {
    grid-template-columns:1fr;
  }

  .hero-grid {
    gap:28px;
  }

  h1 {
    font-size:37px;
  }

  .hero-intro {
    font-size:15px;
  }

  .hero-figure {
    max-width:470px;
    margin:0 auto;
  }

  .intro,
  .section {
    padding:56px 0;
  }

  .card-grid,
  .steps,
  .buy-grid {
    grid-template-columns:1fr;
  }

  .card {
    padding:21px;
  }

  .cta {
    padding-top:35px;
  }

  .cta-box {
    padding:39px 18px;
  }

  .footer-inner {
    display:block;
  }

  .footer-inner span {
    display:block;
    margin-top:7px;
  }
}