:root {
  --ink: #102131;
  --ink-2: #33485b;
  --muted: #6a7882;
  --paper: #f4f0e7;
  --paper-2: #ebe4d6;
  --surface: #fffdf7;
  --navy: #0c1825;
  --navy-2: #13283a;
  --line: rgba(16, 33, 49, .15);
  --mint: #68e0b2;
  --mint-dark: #0d7357;
  --coral: #ff6f59;
  --gold: #f4c45e;
  --blue: #6ca8ff;
  --radius: 18px;
  --shadow: 0 24px 70px rgba(17, 36, 52, .10);
  --sans: "Avenir Next", "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --serif: "Iowan Old Style", "Songti SC", "STSong", "SimSun", serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

a {
  color: inherit;
}

button,
input {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

::selection {
  color: var(--navy);
  background: var(--mint);
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 10px 14px;
  color: var(--navy);
  background: var(--mint);
  border-radius: 8px;
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.reading-progress {
  position: fixed;
  inset: 0 0 auto;
  z-index: 120;
  height: 3px;
  background: transparent;
}

.reading-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--mint);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  min-height: 72px;
  padding: 0 4vw;
  color: #fff;
  background: rgba(12, 24, 37, .94);
  border-bottom: 1px solid rgba(255,255,255,.09);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  width: max-content;
  color: inherit;
  text-decoration: none;
  font-size: .96rem;
  font-weight: 750;
  letter-spacing: -.02em;
}

.brand svg {
  width: 34px;
  height: 34px;
  overflow: visible;
  fill: var(--navy);
  stroke: var(--mint);
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.brand small {
  margin-left: 3px;
  color: #9db0be;
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .08em;
}

.primary-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.primary-nav a {
  padding: 9px 13px;
  color: #aebdc8;
  border-radius: 999px;
  font-size: .82rem;
  text-decoration: none;
  transition: color .2s, background .2s;
}

.primary-nav a:hover,
.primary-nav a:focus-visible {
  color: #fff;
  background: rgba(255,255,255,.08);
}

.share-button {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 14px;
  color: #c8d5dd;
  background: transparent;
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 999px;
  cursor: pointer;
}

.share-button svg {
  width: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
}

.share-button:hover {
  color: #fff;
  border-color: var(--mint);
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  color: #fff;
  background: transparent;
  border: 0;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  margin: 5px auto;
  background: currentColor;
  transition: transform .2s;
}

.hero {
  position: relative;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(circle at 82% 18%, rgba(104, 224, 178, .13), transparent 26%),
    linear-gradient(135deg, var(--navy) 0%, #0b1a29 58%, #102b3b 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .18;
  background-image:
    linear-gradient(rgba(255,255,255,.10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.10) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, .92fr);
  gap: clamp(44px, 7vw, 100px);
  align-items: center;
  width: min(1180px, calc(100% - 48px));
  min-height: 650px;
  margin: 0 auto;
  padding: 86px 0 108px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 13px;
  color: var(--mint-dark);
  font-family: var(--mono);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.eyebrow {
  color: #91a7b6;
}

.eyebrow span {
  color: var(--mint);
}

.hero h1 {
  max-width: 760px;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2rem, 4.5vw, 4.35rem);
  font-weight: 650;
  letter-spacing: -.055em;
  line-height: 1.12;
}

.title-lead {
  white-space: nowrap;
}

.hero h1 em {
  color: var(--mint);
  font-style: normal;
}

.hero-deck {
  max-width: 680px;
  margin: 26px 0 0;
  color: #c4d0d8;
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  line-height: 1.85;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 25px;
  color: #8fa3b1;
  font-size: .83rem;
}

.article-meta span,
.article-meta time {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.article-meta span::before,
.article-meta time::before {
  content: "";
  width: 4px;
  height: 4px;
  background: var(--mint);
  border-radius: 50%;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  font-size: .9rem;
  font-weight: 700;
  text-decoration: none;
  transition: transform .2s, background .2s;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: var(--navy);
  background: var(--mint);
}

.button-ghost {
  color: #d7e1e7;
  border: 1px solid rgba(255,255,255,.2);
}

.button-ghost:hover {
  background: rgba(255,255,255,.07);
}

.hero-diagram {
  min-width: 0;
}

.diagram-grid {
  position: relative;
  min-height: 438px;
  padding: 28px;
  background: rgba(6, 17, 27, .62);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 24px;
  box-shadow: 0 30px 90px rgba(0,0,0,.28);
}

.diagram-grid::after {
  content: "";
  position: absolute;
  inset: 14px;
  pointer-events: none;
  border: 1px solid rgba(255,255,255,.035);
  border-radius: 16px;
}

.diagram-label {
  color: #6f8594;
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .12em;
}

.route-node {
  position: absolute;
  left: 50%;
  z-index: 2;
  width: 194px;
  padding: 16px 18px;
  background: var(--navy-2);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 13px;
  transform: translateX(-50%);
}

.route-node strong {
  display: block;
  margin: 4px 0 2px;
  color: #fff;
  font-size: .96rem;
}

.route-node small {
  color: #8da1ae;
  font-size: .71rem;
}

.node-kicker {
  color: var(--mint);
  font-family: var(--mono);
  font-size: .6rem;
  letter-spacing: .12em;
}

.route-client {
  top: 64px;
}

.route-relay {
  top: 178px;
  width: 238px;
  border-color: rgba(104,224,178,.45);
  box-shadow: inset 0 0 34px rgba(104,224,178,.05);
}

.route-relay .pulse {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 8px;
  height: 8px;
  background: var(--mint);
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(104,224,178,.45);
  animation: pulse 2.2s infinite;
}

@keyframes pulse {
  70% { box-shadow: 0 0 0 9px rgba(104,224,178,0); }
  100% { box-shadow: 0 0 0 0 rgba(104,224,178,0); }
}

.route-line {
  position: absolute;
  left: 50%;
  width: 1px;
  background: linear-gradient(to bottom, var(--mint), rgba(104,224,178,.18));
  transform: translateX(-50%);
}

.route-line span {
  position: absolute;
  left: 7px;
  color: #6b8392;
  font-family: var(--mono);
  font-size: .59rem;
}

.route-line-a {
  top: 143px;
  height: 35px;
}

.route-line-b {
  top: 268px;
  height: 46px;
}

.route-options {
  position: absolute;
  right: 28px;
  bottom: 85px;
  display: grid;
  gap: 7px;
  width: 100px;
}

.route-options div {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 9px;
  color: #a9bbc7;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 7px;
  font-size: .65rem;
}

.route-options::before {
  content: "";
  position: absolute;
  right: calc(100% + 9px);
  top: 50%;
  width: 40px;
  height: 1px;
  background: rgba(104,224,178,.3);
}

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.dot-a { background: var(--mint); }
.dot-b { background: var(--blue); }
.dot-c { background: var(--gold); }

.diagram-note {
  position: absolute;
  bottom: 26px;
  left: 28px;
  right: 145px;
  display: grid;
  gap: 3px;
  padding-top: 14px;
  border-top: 1px solid rgba(255,255,255,.09);
}

.diagram-note span {
  color: #738997;
  font-size: .66rem;
}

.diagram-note strong {
  color: #dce7ec;
  font-size: .77rem;
  font-weight: 650;
}

.hero-ticker {
  position: relative;
  display: flex;
  align-items: center;
  gap: 22px;
  overflow: hidden;
  width: 100%;
  padding: 13px 4vw;
  color: #61798a;
  border-top: 1px solid rgba(255,255,255,.08);
  font-family: var(--mono);
  font-size: .62rem;
  letter-spacing: .18em;
  white-space: nowrap;
}

.hero-ticker i {
  flex: 0 0 auto;
  width: 4px;
  height: 4px;
  background: var(--mint);
  border-radius: 50%;
}

.page-shell {
  display: grid;
  grid-template-columns: minmax(0, 790px) 245px;
  gap: clamp(44px, 7vw, 92px);
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: 84px 0 110px;
}

.article-body {
  min-width: 0;
}

.content-section {
  padding: 0 0 84px;
  margin-bottom: 84px;
  border-bottom: 1px solid var(--line);
}

.content-section:last-of-type {
  border-bottom: 0;
}

.section-heading {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 18px;
  align-items: start;
  margin-bottom: 28px;
}

.section-number {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  color: var(--mint-dark);
  background: rgba(13, 115, 87, .08);
  border: 1px solid rgba(13, 115, 87, .18);
  border-radius: 50%;
  font-family: var(--mono);
  font-size: .75rem;
  font-weight: 700;
}

.section-heading h2,
.sources-section h2 {
  margin: -4px 0 0;
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(1.85rem, 3vw, 2.65rem);
  font-weight: 650;
  letter-spacing: -.035em;
  line-height: 1.25;
}

.article-body p {
  color: var(--ink-2);
  font-size: 1.02rem;
  line-height: 1.9;
}

.article-body .lead {
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(1.25rem, 2vw, 1.55rem);
  line-height: 1.7;
}

.article-body strong {
  color: var(--ink);
}

.answer-card {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 18px;
  align-items: start;
  margin: 30px 0;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.answer-mark {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  color: var(--navy);
  background: var(--mint);
  border-radius: 14px;
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 700;
}

.answer-card p {
  margin: 0;
}

.answer-card .answer-label {
  margin-bottom: 5px;
  color: var(--mint-dark);
  font-family: var(--mono);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .12em;
}

.stat-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 34px 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}

.stat-strip div {
  display: grid;
  gap: 2px;
  padding: 20px;
  background: rgba(255,255,255,.35);
  border-right: 1px solid var(--line);
}

.stat-strip div:last-child {
  border-right: 0;
}

.stat-strip strong {
  color: var(--mint-dark);
  font-family: var(--mono);
  font-size: 1.6rem;
  line-height: 1.1;
}

.stat-strip span {
  color: var(--muted);
  font-size: .76rem;
}

.source-note {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  margin: 30px 0 0;
  padding: 15px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.source-note > span {
  color: var(--mint-dark);
  font-family: var(--mono);
  font-size: .65rem;
  font-weight: 700;
  letter-spacing: .09em;
}

.source-note p {
  margin: 0;
  color: var(--muted);
  font-size: .82rem;
  line-height: 1.75;
}

.source-note a {
  color: var(--mint-dark);
  text-underline-offset: 3px;
}

.benefit-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 28px;
}

.benefit-card {
  position: relative;
  padding: 25px;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
}

.benefit-icon {
  display: inline-block;
  color: rgba(13,115,87,.35);
  font-family: var(--mono);
  font-size: .7rem;
  font-weight: 700;
}

.benefit-card h3,
.type-grid h3,
.decision-grid h3,
.deployment-compare h2 {
  margin: 9px 0 8px;
  color: var(--ink);
  font-size: 1.15rem;
  line-height: 1.4;
}

.benefit-card p {
  margin: 0;
  color: var(--muted);
  font-size: .88rem;
  line-height: 1.75;
}

.benefit-card::after {
  content: "";
  position: absolute;
  right: -18px;
  bottom: -18px;
  width: 70px;
  height: 70px;
  border: 1px solid rgba(13,115,87,.12);
  border-radius: 50%;
}

.timeline {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
}

.timeline li {
  position: relative;
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 20px;
  padding: 0 0 34px;
}

.timeline li:not(:last-child)::before {
  content: "";
  position: absolute;
  top: 37px;
  bottom: 0;
  left: 23px;
  width: 1px;
  background: var(--line);
}

.timeline-index {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  color: var(--mint-dark);
  background: var(--paper);
  border: 1px solid rgba(13,115,87,.25);
  border-radius: 50%;
  font-family: var(--mono);
  font-size: .68rem;
  font-weight: 700;
}

.timeline h3 {
  margin: 2px 0 6px;
  font-size: 1.05rem;
}

.timeline p {
  margin: 0;
  color: var(--muted);
  font-size: .9rem;
  line-height: 1.75;
}

.timeline code {
  display: inline-block;
  margin-top: 10px;
  padding: 4px 8px;
  color: #1c566b;
  background: rgba(108,168,255,.10);
  border-radius: 6px;
  font-family: var(--mono);
  font-size: .72rem;
}

.risk-tag {
  display: inline-flex;
  margin-top: 8px;
  padding: 2px 8px;
  color: #9a382a;
  background: rgba(255,111,89,.12);
  border-radius: 999px;
  font-size: .68rem;
  font-weight: 700;
}

.callout {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  margin: 24px 0 0;
  padding: 20px 22px;
  border-radius: 13px;
}

.callout p {
  margin: 0;
  color: inherit;
  font-size: .9rem;
  line-height: 1.75;
}

.callout-label {
  color: inherit;
  font-family: var(--mono);
  font-size: .67rem;
  font-weight: 700;
  letter-spacing: .08em;
  white-space: nowrap;
}

.callout-dark {
  color: #dae5eb;
  background: var(--navy);
}

.callout-dark .callout-label {
  color: var(--mint);
}

.callout-alert {
  color: #5d2019;
  background: #ffe6df;
  border: 1px solid rgba(255,111,89,.25);
}

.module-stack {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}

.module-card {
  padding: 25px 27px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
}

.module-top {
  display: flex;
  align-items: baseline;
  gap: 13px;
}

.module-top > span {
  color: var(--mint-dark);
  font-family: var(--mono);
  font-size: .68rem;
  font-weight: 700;
}

.module-top h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.45rem;
}

.module-card > p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: .9rem;
}

.module-flow {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 17px 0;
  padding: 12px;
  overflow-x: auto;
  color: var(--ink-2);
  background: var(--paper);
  border-radius: 9px;
  font-size: .72rem;
  white-space: nowrap;
}

.module-flow i {
  color: var(--mint-dark);
  font-style: normal;
}

.module-card .module-takeaway {
  padding-top: 14px;
  color: var(--ink-2);
  border-top: 1px solid var(--line);
  font-size: .84rem;
}

.type-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 13px;
  margin-top: 28px;
}

.type-grid article {
  position: relative;
  min-width: 0;
  padding: 23px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 15px;
}

.type-index {
  position: absolute;
  top: 18px;
  right: 19px;
  color: var(--paper-2);
  font-family: var(--serif);
  font-size: 2rem;
  font-weight: 700;
}

.type-label {
  margin: 0;
  color: var(--mint-dark);
  font-family: var(--mono);
  font-size: .62rem;
  letter-spacing: .07em;
}

.type-grid h3 {
  margin-top: 28px;
}

.type-grid p {
  margin: 0;
  color: var(--muted);
  font-size: .84rem;
  line-height: 1.7;
}

.type-grid footer {
  margin-top: 18px;
  padding-top: 13px;
  color: var(--mint-dark);
  border-top: 1px solid var(--line);
  font-size: .7rem;
}

.comparison-wrap {
  margin: 28px 0;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 15px;
  -webkit-overflow-scrolling: touch;
}

.comparison-table {
  width: 100%;
  min-width: 650px;
  border-collapse: collapse;
  background: var(--surface);
  font-size: .86rem;
}

.comparison-table th,
.comparison-table td {
  padding: 15px 18px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  border-right: 1px solid var(--line);
}

.comparison-table th:last-child,
.comparison-table td:last-child {
  border-right: 0;
}

.comparison-table tr:last-child th,
.comparison-table tr:last-child td {
  border-bottom: 0;
}

.comparison-table thead th {
  color: #dce7ed;
  background: var(--navy);
  font-size: .78rem;
}

.comparison-table thead th:nth-child(2) {
  color: var(--gold);
}

.comparison-table thead th:nth-child(3) {
  color: var(--mint);
}

.comparison-table tbody th {
  width: 24%;
  color: var(--ink);
  background: rgba(235,228,214,.43);
  font-size: .78rem;
}

.comparison-table td {
  color: var(--ink-2);
}

.comparison-table tbody tr:hover td {
  background: rgba(104,224,178,.04);
}

.formula-card {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  padding: 22px;
  background: var(--navy);
  border-radius: 15px;
}

.formula-card div {
  display: grid;
  gap: 3px;
  text-align: center;
}

.formula-card span {
  color: #8297a5;
  font-size: .68rem;
}

.formula-card strong {
  color: #fff;
  font-family: var(--serif);
  font-size: 1.25rem;
}

.formula-card div:first-child strong {
  color: var(--gold);
}

.formula-card div:last-child strong {
  color: var(--mint);
}

.formula-card i {
  color: #557081;
  font-style: normal;
}

.risk-board {
  display: grid;
  gap: 1px;
  margin-top: 28px;
  overflow: hidden;
  background: rgba(255,111,89,.18);
  border: 1px solid rgba(255,111,89,.24);
  border-radius: 15px;
}

.risk-item {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 15px;
  padding: 20px 23px;
  background: #fff8f4;
}

.risk-item > span {
  color: var(--coral);
  font-family: var(--mono);
  font-size: .66rem;
  font-weight: 700;
}

.risk-item h3 {
  margin: 0 0 4px;
  font-size: .98rem;
}

.risk-item p {
  margin: 0;
  color: #71554f;
  font-size: .85rem;
  line-height: 1.7;
}

.checklist-card {
  margin-top: 25px;
  padding: 24px;
  color: #dce7ed;
  background: var(--navy-2);
  border-radius: 16px;
}

.checklist-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 14px;
}

.checklist-head .section-kicker {
  margin-bottom: 5px;
  color: var(--mint);
}

.checklist-head h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.35rem;
}

.checklist-head button {
  min-height: 34px;
  padding: 0 12px;
  color: #aebfc9;
  background: transparent;
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 999px;
  font-size: .72rem;
  cursor: pointer;
}

.checklist-card label {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  min-height: 42px;
  padding: 9px 0;
  color: #c1cfd7;
  border-top: 1px solid rgba(255,255,255,.08);
  cursor: pointer;
  font-size: .84rem;
}

.checklist-card input {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin: 3px 0 0;
  accent-color: var(--mint);
}

.checklist-card label strong {
  color: #fff;
}

.checklist-score {
  margin: 12px 0 0;
  color: #8297a5;
  font-family: var(--mono);
  font-size: .72rem;
}

.checklist-score strong {
  color: var(--mint);
}

.decision-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 13px;
  margin-top: 28px;
  scroll-margin-top: 100px;
}

.decision-grid article {
  min-width: 0;
  padding: 24px 22px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 15px;
}

.decision-grid .decision-featured {
  color: #fff;
  background: var(--navy);
  border-color: var(--navy);
}

.decision-tag {
  display: inline-flex;
  padding: 3px 9px;
  color: var(--mint-dark);
  background: rgba(104,224,178,.14);
  border-radius: 999px;
  font-size: .64rem;
  font-weight: 700;
}

.decision-featured .decision-tag {
  color: var(--mint);
}

.decision-grid h3 {
  margin-top: 16px;
}

.decision-grid p {
  margin: 0;
  color: var(--muted);
  font-size: .84rem;
  line-height: 1.72;
}

.decision-featured h3 {
  color: #fff;
}

.decision-featured p {
  color: #a9bac5;
}

.decision-grid .decision-call {
  margin-top: 15px;
  padding-top: 13px;
  color: var(--ink-2);
  border-top: 1px solid var(--line);
  font-size: .8rem;
}

.decision-featured .decision-call {
  color: #d4e0e6;
  border-color: rgba(255,255,255,.12);
}

.decision-call strong {
  color: var(--mint-dark);
}

.decision-featured .decision-call strong {
  color: var(--mint);
}

.deployment-compare {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 15px;
  margin-top: 38px;
}

.deployment-compare article {
  padding: 27px;
  background: var(--paper-2);
  border-radius: 16px;
}

.deployment-compare h2 {
  margin-top: 0;
  font-family: var(--serif);
  font-size: 1.55rem;
}

.deployment-compare p {
  margin: 0;
  font-size: .88rem;
}

.deployment-compare ul {
  margin: 17px 0 0;
  padding-left: 20px;
  color: var(--ink-2);
  font-size: .84rem;
}

.deployment-compare li + li {
  margin-top: 7px;
}

.summary-statement {
  margin-top: 29px;
  padding: 28px;
  color: #fff;
  background:
    linear-gradient(120deg, rgba(104,224,178,.12), transparent 45%),
    var(--navy);
  border-radius: 16px;
}

.summary-statement > span {
  color: var(--mint);
  font-family: var(--mono);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .12em;
}

.summary-statement p {
  margin: 10px 0 0;
  color: #d7e2e8;
  font-family: var(--serif);
  font-size: 1.3rem;
  line-height: 1.7;
}

.faq-list {
  margin-top: 28px;
  border-top: 1px solid var(--line);
}

.faq-list details {
  border-bottom: 1px solid var(--line);
}

.faq-list summary {
  position: relative;
  min-height: 64px;
  padding: 19px 52px 19px 0;
  color: var(--ink);
  cursor: pointer;
  font-size: .98rem;
  font-weight: 650;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 5px;
  color: var(--mint-dark);
  font-size: 1.5rem;
  font-weight: 400;
  transform: translateY(-50%);
  transition: transform .2s;
}

.faq-list details[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
}

.faq-list details p {
  margin: 0;
  padding: 0 34px 22px 0;
  color: var(--muted);
  font-size: .9rem;
}

.sources-section {
  padding: 34px;
  background: var(--paper-2);
  border-radius: 18px;
}

.sources-section > p {
  color: var(--ink-2);
  font-size: .9rem;
}

.source-link {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 16px;
  align-items: center;
  margin: 22px 0;
  padding: 18px;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  text-decoration: none;
}

.source-link > span {
  color: var(--mint-dark);
  font-family: var(--mono);
  font-size: .65rem;
}

.source-link strong {
  font-size: .84rem;
}

.source-link i {
  color: var(--mint-dark);
  font-style: normal;
}

.sources-section .disclaimer {
  margin-bottom: 0;
  padding-top: 16px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: .76rem;
}

.article-sidebar {
  position: relative;
}

.toc-card {
  position: sticky;
  top: 102px;
  padding: 20px;
  background: rgba(255,253,247,.72);
  border: 1px solid var(--line);
  border-radius: 15px;
  backdrop-filter: blur(10px);
}

.toc-card > p {
  margin: 0 0 15px;
  color: var(--mint-dark);
  font-family: var(--mono);
  font-size: .63rem;
  font-weight: 700;
  letter-spacing: .13em;
}

.toc-card nav {
  display: grid;
}

.toc-card nav a {
  display: flex;
  align-items: center;
  min-height: 34px;
  padding: 5px 9px;
  color: var(--muted);
  border-left: 2px solid transparent;
  font-size: .77rem;
  text-decoration: none;
  transition: color .2s, border-color .2s, background .2s;
}

.toc-card nav a:hover,
.toc-card nav a.active {
  color: var(--ink);
  background: rgba(104,224,178,.10);
  border-left-color: var(--mint-dark);
}

.toc-footer {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 9px;
  align-items: center;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.toc-footer span {
  color: var(--mint-dark);
  font-family: var(--mono);
  font-size: .62rem;
}

.toc-footer div {
  height: 3px;
  overflow: hidden;
  background: var(--paper-2);
  border-radius: 999px;
}

.toc-footer i {
  display: block;
  width: 0;
  height: 100%;
  background: var(--mint-dark);
}

.sidebar-note {
  margin-top: 16px;
  padding: 20px;
  color: #d9e5eb;
  background: var(--navy);
  border-radius: 15px;
}

.sidebar-note span {
  color: var(--mint);
  font-family: var(--mono);
  font-size: .61rem;
  font-weight: 700;
  letter-spacing: .1em;
}

.sidebar-note p {
  margin: 9px 0 0;
  color: #a8bac5;
  font-size: .8rem;
  line-height: 1.7;
}

.sidebar-note strong {
  color: #fff;
}

.site-footer {
  color: #91a4b1;
  background: #08131e;
  border-top: 1px solid rgba(255,255,255,.07);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 30px;
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: 54px 0 28px;
}

.footer-brand {
  color: #fff;
}

.footer-inner > div:first-child p {
  margin: 12px 0 0;
  color: #718696;
  font-size: .82rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: flex-end;
  gap: 4px 18px;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  color: #b5c6d0;
  font-size: .78rem;
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--mint);
}

.copyright {
  grid-column: 1 / -1;
  margin: 0;
  padding-top: 22px;
  color: #546c7b;
  border-top: 1px solid rgba(255,255,255,.07);
  font-family: var(--mono);
  font-size: .64rem;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  z-index: 250;
  padding: 10px 16px;
  color: var(--navy);
  background: var(--mint);
  border-radius: 999px;
  box-shadow: 0 12px 35px rgba(0,0,0,.22);
  font-size: .8rem;
  font-weight: 700;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 16px);
  transition: opacity .2s, transform .2s;
}

.toast.visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

.reveal {
  opacity: 1;
  transform: none;
}

@media (max-width: 980px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .menu-toggle {
    display: block;
    justify-self: end;
  }

  .share-button {
    display: none;
  }

  .primary-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    display: none;
    align-items: stretch;
    gap: 0;
    padding: 14px 20px 24px;
    background: var(--navy);
    border-bottom: 1px solid rgba(255,255,255,.1);
    box-shadow: 0 20px 50px rgba(0,0,0,.3);
  }

  .primary-nav.open {
    display: grid;
  }

  .primary-nav a {
    display: flex;
    align-items: center;
    min-height: 46px;
    padding: 0 12px;
    border-radius: 8px;
    font-size: .9rem;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 54px;
    padding: 72px 0 90px;
  }

  .hero-copy {
    max-width: 760px;
  }

  .hero-diagram {
    width: min(540px, 100%);
    margin: 0 auto;
  }

  .page-shell {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .article-sidebar {
    display: none;
  }
}

@media (max-width: 700px) {
  .site-header {
    min-height: 64px;
    padding: 0 18px;
  }

  .primary-nav {
    top: 64px;
  }

  .brand small {
    display: none;
  }

  .hero-grid,
  .page-shell,
  .footer-inner {
    width: min(100% - 28px, 1180px);
  }

  .hero-grid {
    min-height: 0;
    padding: 58px 0 70px;
  }

  .hero h1 {
    font-size: clamp(2rem, 10vw, 3.5rem);
    letter-spacing: -.045em;
  }

  .hero-deck {
    font-size: .96rem;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .button {
    padding: 0 14px;
    font-size: .8rem;
  }

  .diagram-grid {
    min-height: 410px;
    padding: 20px;
  }

  .route-node {
    width: 170px;
  }

  .route-relay {
    width: 210px;
  }

  .route-options {
    right: 20px;
    bottom: 90px;
  }

  .diagram-note {
    left: 20px;
    right: 120px;
  }

  .page-shell {
    padding: 58px 0 76px;
  }

  .content-section {
    padding-bottom: 58px;
    margin-bottom: 58px;
  }

  .section-heading {
    grid-template-columns: 42px 1fr;
    gap: 12px;
  }

  .section-number {
    width: 40px;
    height: 40px;
    font-size: .65rem;
  }

  .section-heading h2,
  .sources-section h2 {
    font-size: clamp(1.7rem, 7vw, 2.2rem);
  }

  .article-body p,
  .article-body .lead {
    font-size: 1rem;
  }

  .answer-card {
    grid-template-columns: 44px 1fr;
    gap: 13px;
    padding: 18px;
  }

  .answer-mark {
    width: 42px;
    height: 42px;
  }

  .stat-strip div {
    padding: 15px 11px;
  }

  .stat-strip strong {
    font-size: 1.35rem;
  }

  .stat-strip span {
    font-size: .67rem;
  }

  .source-note {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .benefit-grid,
  .type-grid,
  .decision-grid,
  .deployment-compare {
    grid-template-columns: 1fr;
  }

  .benefit-card,
  .type-grid article,
  .decision-grid article {
    padding: 21px;
  }

  .module-card {
    padding: 22px 18px;
  }

  .formula-card {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .formula-card i {
    transform: rotate(90deg);
  }

  .risk-item {
    grid-template-columns: 30px 1fr;
    gap: 10px;
    padding: 18px;
  }

  .checklist-card {
    padding: 19px 17px;
  }

  .callout {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 18px;
  }

  .sources-section {
    padding: 23px 18px;
  }

  .source-link {
    grid-template-columns: 1fr auto;
  }

  .source-link > span {
    grid-column: 1 / -1;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 42px 0 24px;
  }

  .footer-links {
    justify-content: flex-start;
    gap: 2px 15px;
  }

  .footer-links a {
    min-height: 38px;
  }
}

@media (max-width: 390px) {
  .hero h1 {
    font-size: 2rem;
  }

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

  .route-options {
    width: 93px;
  }

  .diagram-note {
    right: 108px;
  }

  .article-meta {
    gap: 7px 13px;
    font-size: .76rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}