:root {
  --article-ink: #111d36;
  --article-muted: #60708e;
  --article-blue: #316bfa;
  --article-violet: #6654f7;
  --article-cyan: #39b9df;
  --article-line: #dce4f3;
  --article-soft: #f3f6ff;
  --article-paper: #ffffff;
}

.article-library-section {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #f8faff 0%, #eef3ff 100%);
}

.article-library-section::before {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  right: -180px;
  top: -220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(102, 84, 247, .14), rgba(49, 107, 250, 0) 70%);
  pointer-events: none;
}

.article-library-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 24px;
}

.article-library-head h2 {
  max-width: 800px;
  margin: 10px 0 0;
}

.article-library-head > p {
  max-width: 420px;
  margin: 0;
  color: var(--article-muted);
  line-height: 1.75;
}

.article-latest-card {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(320px, .82fr);
  min-height: 360px;
  overflow: hidden;
  border: 1px solid rgba(92, 108, 154, .2);
  border-radius: 30px;
  background: rgba(255, 255, 255, .92);
  box-shadow: 0 24px 70px rgba(54, 71, 126, .12);
}

.article-latest-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(30px, 5vw, 64px);
}

.article-kicker {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  gap: 8px;
  color: var(--article-violet);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: .12em;
}

.article-kicker::before {
  content: "";
  width: 22px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--article-blue), var(--article-violet));
}

.article-latest-copy h3,
.article-archive-copy h3 {
  margin: 16px 0 14px;
  color: var(--article-ink);
  font-size: clamp(28px, 3.5vw, 46px);
  line-height: 1.12;
  letter-spacing: -.035em;
}

.article-latest-copy h3 a,
.article-archive-copy h3 a {
  color: inherit;
  text-decoration: none;
}

.article-latest-copy h3 a:hover,
.article-archive-copy h3 a:hover {
  color: var(--article-violet);
}

.article-latest-copy > p,
.article-archive-copy > p {
  margin: 0;
  color: var(--article-muted);
  line-height: 1.85;
}

.article-latest-actions,
.article-archive-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px 20px;
  margin-top: 24px;
  color: #71809a;
  font-size: 14px;
}

.article-read-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 20px;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--article-blue), var(--article-violet));
  color: #fff !important;
  font-weight: 850;
  text-decoration: none;
  box-shadow: 0 10px 24px rgba(82, 79, 235, .2);
}

.article-read-link::after { content: " →"; }
.article-read-link:hover { transform: translateY(-2px); }

.article-index-visual {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto 1.16fr;
  align-items: center;
  gap: 14px;
  min-height: 100%;
  padding: 44px 32px;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(circle at 18% 12%, rgba(66, 211, 242, .28), transparent 30%),
    radial-gradient(circle at 92% 88%, rgba(122, 89, 255, .46), transparent 46%),
    linear-gradient(145deg, #12234a, #26377f 58%, #4333a4);
}

.article-index-visual::after {
  content: "";
  position: absolute;
  inset: 18px;
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 24px;
}

.article-index-cost,
.article-index-asset,
.article-index-arrow {
  position: relative;
  z-index: 1;
}

.article-index-cost,
.article-index-asset {
  display: flex;
  min-height: 160px;
  flex-direction: column;
  justify-content: center;
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 22px;
  background: rgba(255, 255, 255, .08);
  backdrop-filter: blur(8px);
}

.article-index-cost > span,
.article-index-asset > span { font-weight: 900; }
.article-index-bars { display: flex; align-items: end; gap: 6px; height: 70px; margin-top: 12px; }
.article-index-bars i { width: 18%; border-radius: 5px 5px 2px 2px; background: linear-gradient(180deg, #75e7fa, #447bf7); }
.article-index-bars i:nth-child(1) { height: 26%; }
.article-index-bars i:nth-child(2) { height: 44%; }
.article-index-bars i:nth-child(3) { height: 68%; }
.article-index-bars i:nth-child(4) { height: 94%; }
.article-index-arrow { font-size: 28px; color: #73e4f6; }
.article-index-asset { border-color: rgba(123, 225, 248, .38); }
.article-index-asset b { margin-top: 14px; font-size: 19px; line-height: 1.35; }
.article-index-asset small { margin-top: 8px; color: #c7d7ff; line-height: 1.5; }

.article-archive-section { margin-top: 34px; }
.article-archive-list { display: grid; gap: 16px; }
.article-archive-card {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  gap: 26px;
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--article-line);
  border-radius: 24px;
  background: var(--article-paper);
  box-shadow: 0 16px 42px rgba(44, 62, 114, .08);
}
.article-archive-number { color: #a3acc3; font-size: 30px; font-weight: 800; }
.article-archive-copy h3 { font-size: clamp(24px, 3vw, 34px); }

.article-page-hero {
  padding: clamp(72px, 10vw, 132px) 0 clamp(48px, 7vw, 82px);
  background:
    radial-gradient(circle at 82% 18%, rgba(102, 84, 247, .18), transparent 30%),
    radial-gradient(circle at 10% 74%, rgba(57, 185, 223, .14), transparent 28%),
    linear-gradient(180deg, #f8faff, #eef3ff);
}
.article-page-hero .shell { max-width: 1120px; }
.article-page-label { color: var(--article-violet); font-size: 13px; font-weight: 900; letter-spacing: .14em; }
.article-page-hero h1 { max-width: 980px; margin: 18px 0; color: var(--article-ink); font-size: clamp(42px, 7vw, 76px); line-height: 1.02; letter-spacing: -.055em; }
.article-page-deck { max-width: 820px; margin: 0; color: #536583; font-size: clamp(18px, 2vw, 23px); line-height: 1.75; }
.article-page-route { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.article-page-route span { padding: 8px 12px; border: 1px solid #d5def0; border-radius: 999px; background: rgba(255,255,255,.72); color: #5b6780; font-size: 13px; font-weight: 750; }

.article-reading-shell {
  display: grid;
  grid-template-columns: 230px minmax(0, 790px);
  justify-content: center;
  gap: clamp(42px, 7vw, 84px);
  padding: clamp(52px, 8vw, 100px) 24px;
}
.article-toc {
  position: sticky;
  top: 104px;
  align-self: start;
  padding: 20px;
  border: 1px solid var(--article-line);
  border-radius: 20px;
  background: #fff;
  box-shadow: 0 14px 38px rgba(39, 55, 98, .07);
}
.article-toc > b { display: block; margin-bottom: 12px; color: var(--article-ink); }
.article-toc ol { display: grid; gap: 7px; margin: 0; padding: 0; list-style: none; }
.article-toc a { display: block; padding: 7px 8px; border-radius: 9px; color: #61708b; font-size: 14px; line-height: 1.45; text-decoration: none; }
.article-toc a:hover, .article-toc a:focus-visible { background: var(--article-soft); color: var(--article-violet); }

.article-body { min-width: 0; color: #263652; font-size: 18px; line-height: 1.95; }
.article-body .article-lead { margin: 0 0 40px; padding: 26px 28px; border-left: 4px solid var(--article-violet); border-radius: 4px 18px 18px 4px; background: var(--article-soft); color: #344662; font-size: 20px; }
.article-body section { scroll-margin-top: 96px; }
.article-body h2 { margin: 76px 0 24px; color: var(--article-ink); font-size: clamp(30px, 4.2vw, 46px); line-height: 1.18; letter-spacing: -.035em; }
.article-body h2 span { display: block; margin-bottom: 9px; color: var(--article-violet); font-size: 14px; letter-spacing: .13em; }
.article-body h3 { margin: 38px 0 14px; color: var(--article-ink); font-size: 25px; line-height: 1.35; }
.article-body p { margin: 0 0 1.25em; }
.article-body strong { color: #172642; }
.article-body blockquote { margin: 34px 0; padding: 24px 28px; border: 0; border-radius: 20px; background: linear-gradient(130deg, #142a57, #302f83); color: #fff; font-size: 22px; font-weight: 800; line-height: 1.55; }
.article-body ul { margin: 18px 0 28px; padding-left: 1.25em; }
.article-body li { margin: 8px 0; }
.article-body .article-sequence { display: flex; flex-wrap: wrap; gap: 8px; margin: 24px 0 30px; padding: 0; list-style: none; }
.article-body .article-sequence li { display: flex; align-items: center; min-height: 42px; margin: 0; padding: 8px 13px; border: 1px solid #dce4f4; border-radius: 999px; background: #f6f8ff; color: #354766; font-size: 15px; font-weight: 760; }
.article-body .article-sequence li:not(:last-child)::after { content: "→"; margin-left: 12px; color: var(--article-violet); }
.article-body .data-example { display: grid; gap: 12px; margin: 26px 0; padding: 24px; border: 1px solid #dce3f1; border-radius: 20px; background: #fbfcff; }
.article-body .data-example b { color: var(--article-violet); }

.article-figure { margin: 42px 0 50px; }
.article-figure img, .article-figure-graphic { display: block; width: 100%; border-radius: 24px; }
.article-figure img { height: auto; background: #0b0c10; }
.article-figure.is-portrait img { width: min(100%, 640px); margin-inline: auto; }
.article-figure figcaption { margin-top: 13px; color: #6c7890; font-size: 14px; line-height: 1.6; text-align: center; }
.article-figure-graphic { position: relative; overflow: hidden; padding: clamp(26px, 5vw, 48px); border: 1px solid #d9e1f2; background: linear-gradient(150deg, #fbfcff, #edf3ff); box-shadow: 0 18px 50px rgba(49, 75, 133, .08); }
.figure-title { display: block; color: var(--article-ink); font-size: clamp(24px, 4vw, 38px); line-height: 1.16; }
.figure-title em { color: var(--article-blue); font-style: normal; }

.cost-chart { display: grid; grid-template-columns: repeat(4, 1fr); align-items: end; gap: 14px; height: 210px; margin-top: 32px; padding: 0 10px 24px; border-bottom: 2px solid #ccd8ee; }
.cost-chart i { position: relative; border-radius: 14px 14px 4px 4px; background: linear-gradient(180deg, #6f8eff, #316bfa); }
.cost-chart i:nth-child(1) { height: 28%; opacity: .48; }
.cost-chart i:nth-child(2) { height: 45%; opacity: .64; }
.cost-chart i:nth-child(3) { height: 70%; opacity: .82; }
.cost-chart i:nth-child(4) { height: 96%; }
.cost-chart i::after { content: ""; position: absolute; left: 50%; top: -7px; width: 13px; height: 13px; border-radius: 50%; background: #ff9c50; box-shadow: 0 0 0 4px #fff; }
.cost-chart-label { display: flex; justify-content: space-between; margin-top: 14px; color: #697891; font-size: 14px; }

.traffic-cycle { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; margin-top: 30px; }
.traffic-cycle > span { display: grid; place-items: center; min-height: 82px; padding: 16px; border: 1px solid rgba(110, 222, 246, .3); border-radius: 18px; background: rgba(255,255,255,.08); color: #e9f3ff; font-weight: 760; text-align: center; }
.traffic-cycle-wrap { background: radial-gradient(circle at center, #254e91, #102b58 68%); color: #fff; }
.traffic-cycle-wrap .figure-title { color: #fff; }
.traffic-cycle-core { display: grid; place-items: center; width: 190px; height: 190px; margin: 28px auto 0; border: 2px solid #63d5f0; border-radius: 50%; background: #f7fbff; color: #152a50; text-align: center; }
.traffic-cycle-core b { font-size: 28px; }
.traffic-cycle-core small { display: block; color: #71809b; }

.roi-compare { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: 30px; }
.roi-compare article { padding: 25px; border-top: 7px solid #9eabc3; border-radius: 18px; background: #fff; box-shadow: 0 12px 30px rgba(37,56,106,.08); }
.roi-compare article:last-child { border-color: var(--article-blue); }
.roi-compare span { color: #6d7890; font-size: 14px; }
.roi-compare strong { display: block; margin: 18px 0 3px; color: #182640; font-size: 52px; line-height: 1; }
.roi-compare article:last-child strong { color: var(--article-blue); }
.roi-compare b { display: block; margin-top: 14px; font-size: 22px; }

.asset-loop { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; align-items: center; margin-top: 30px; }
.asset-loop span { display: grid; place-items: center; min-height: 84px; padding: 12px; border: 1px solid #d2dcf0; border-radius: 50%; background: #fff; color: #243859; font-size: 14px; font-weight: 800; text-align: center; }
.asset-loop span::after { content: "→"; position: absolute; }
.asset-loop-core { grid-column: 2 / 5; display: grid; place-items: center; min-height: 130px; margin: 6px 0; border-radius: 999px; background: linear-gradient(130deg, var(--article-blue), var(--article-violet)); color: #fff; font-size: 30px; font-weight: 900; }

.article-about { margin-top: 70px; padding: 30px; border: 1px solid #dce3f1; border-radius: 24px; background: #f7f9ff; }
.article-about h2 { margin-top: 0; font-size: 30px; }
.article-navigation { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 48px; }
.article-navigation a, .article-navigation div { display: flex; min-height: 96px; flex-direction: column; justify-content: center; padding: 20px 22px; border: 1px solid #dce3f1; border-radius: 18px; background: #fff; color: var(--article-ink); text-decoration: none; }
.article-navigation span { color: #79859b; font-size: 13px; }
.article-navigation b { margin-top: 6px; }

@media (max-width: 920px) {
  .article-latest-card { grid-template-columns: 1fr; }
  .article-index-visual { min-height: 310px; }
  .article-reading-shell { grid-template-columns: 1fr; }
  .article-toc { position: static; }
}

@media (max-width: 680px) {
  .article-library-head { display: block; }
  .article-library-head > p { margin-top: 12px; }
  .article-latest-copy { padding: 28px 22px; }
  .article-latest-copy h3 { font-size: 30px; }
  .article-index-visual { grid-template-columns: 1fr; min-height: 0; padding: 30px 22px; }
  .article-index-arrow { transform: rotate(90deg); justify-self: center; }
  .article-index-cost, .article-index-asset { min-height: 126px; }
  .article-archive-card { grid-template-columns: 1fr; gap: 12px; padding: 24px 20px; }
  .article-archive-number { font-size: 22px; }
  .article-page-hero { padding-top: 72px; }
  .article-page-hero h1 { font-size: 43px; }
  .article-reading-shell { gap: 28px; padding: 36px 18px 70px; }
  .article-body { font-size: 16.5px; line-height: 1.9; }
  .article-body .article-lead { padding: 20px; font-size: 18px; }
  .article-body h2 { margin-top: 58px; font-size: 31px; }
  .article-body h3 { font-size: 22px; }
  .article-body blockquote { padding: 22px; font-size: 19px; }
  .article-body .article-sequence { display: grid; }
  .article-body .article-sequence li:not(:last-child)::after { margin-left: auto; }
  .traffic-cycle, .roi-compare { grid-template-columns: 1fr; }
  .asset-loop { grid-template-columns: repeat(2, 1fr); }
  .asset-loop-core { grid-column: 1 / -1; }
  .article-navigation { grid-template-columns: 1fr; }
}