/* ==========================================================================
   Carbon2X — Main Stylesheet
   Derived from carbon2x主页设计方案.html
   ========================================================================== */

:root {
  --bg: #071521;
  --bg-soft: #0b1d29;
  --panel: rgba(255, 255, 255, 0.045);
  --panel-strong: rgba(255, 255, 255, 0.075);
  --green: #42d49b;
  --cyan: #61d8e8;
  --blue: #70a7ff;
  --text: #f4f8fa;
  --muted: #a4b5bf;
  --muted-2: #6f858f;
  --border: rgba(255, 255, 255, 0.11);
  --max-width: 1180px;
  --radius: 20px;
  --shadow: 0 18px 50px rgba(11, 35, 29, 0.08);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background:
    radial-gradient(circle at 80% 10%, rgba(51, 196, 145, 0.12), transparent 28%),
    radial-gradient(circle at 10% 25%, rgba(75, 140, 255, 0.12), transparent 30%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input { font: inherit; }

:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 1000;
  padding: 10px 16px;
  border-radius: 8px;
  background: #fff;
  color: #071521;
  font-weight: 700;
}
.skip-link:focus { top: 14px; }

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

.eyebrow {
  color: var(--green);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-weight: 700;
  margin-bottom: 14px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3.35rem);
  line-height: 1.08;
  max-width: 820px;
  letter-spacing: -0.04em;
  margin-bottom: 18px;
}

.section-copy {
  max-width: 720px;
  color: var(--muted);
  font-size: 1.05rem;
}

section { padding: 78px 0; }

.content-surface {
  --text: #10241f;
  --muted: #536660;
  --muted-2: #788983;
  --border: rgba(12, 61, 47, 0.13);
  --panel: #ffffff;
  --panel-strong: #f7faf8;
  color: var(--text);
  background: #f4f7f5;
}

.content-surface .eyebrow,
.content-surface .text-link,
.content-surface .insight-tag { color: #0c8f62; }

.section-heading-row {
  display: flex;
  justify-content: space-between;
  align-items: end;
  flex-wrap: wrap;
  gap: 20px;
}
.section-heading-row .section-title { margin-bottom: 0; }
.no-margin { margin-bottom: 0 !important; }

/* ---------------- NAV ---------------- */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(18px);
  background: rgba(7, 21, 33, 0.82);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  letter-spacing: -0.03em;
  font-size: 1.3rem;
}
.brand-symbol {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-size: 0.8rem;
  font-weight: 800;
  color: #041b14;
  background: linear-gradient(135deg, var(--green), var(--cyan));
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  color: var(--muted);
  font-size: 0.92rem;
}
.nav-links a:hover { color: var(--text); }
.nav-cta {
  border: 1px solid var(--border);
  padding: 10px 16px;
  border-radius: 999px;
  color: var(--text);
}
.menu-toggle { display: none; }

/* ---------------- HERO ---------------- */
.hero {
  min-height: 690px;
  display: flex;
  align-items: center;
  position: relative;
  padding: 92px 0 78px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(180deg, rgba(7,21,33,0.55), rgba(7,21,33,0.85)),
    url("/assets/images/hero-bg.jpg");
  background-size: cover;
  background-position: center;
  z-index: -1;
  opacity: 0.72;
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.65fr);
  gap: 70px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero h1 {
  font-size: clamp(3.4rem, 6.3vw, 6.2rem);
  line-height: 0.95;
  letter-spacing: -0.065em;
  margin-bottom: 28px;
}
.hero h1 span { color: var(--green); }
.hero-copy {
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.28rem);
  max-width: 720px;
  line-height: 1.65;
  margin-bottom: 38px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 42px;
}
.button {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  border-radius: 999px;
  padding: 14px 21px;
  font-weight: 700;
  transition: 0.25s ease;
  cursor: pointer;
  border: none;
  font-size: 0.95rem;
}
.button-primary {
  background: var(--green);
  color: #061c14;
}
.button-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(66, 212, 155, 0.18);
}
.button-secondary {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.025);
  color: var(--text);
}
.button-secondary:hover { background: rgba(255, 255, 255, 0.05); }
.hero-byline {
  display: flex;
  gap: 12px;
  align-items: center;
  color: var(--muted);
  font-size: 0.9rem;
}
.avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, #23475d, #2f7e68);
  border: 1px solid rgba(255, 255, 255, 0.13);
  flex-shrink: 0;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }
.avatar span { width: 100%; height: 100%; display: grid; place-items: center; color: var(--green); font-size: 0.67rem; font-weight: 800; }

.hero-visual {
  position: relative;
  min-height: 460px;
  border-radius: 30px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.01));
  overflow: hidden;
}
.hero-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 38px 38px;
  mask-image: linear-gradient(to bottom, black, transparent);
}
.flow-node {
  position: absolute;
  padding: 14px 18px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(8, 27, 39, 0.8);
  backdrop-filter: blur(12px);
}
.flow-node strong { display: block; font-size: 0.92rem; margin-bottom: 4px; }
.flow-node small { color: var(--muted); }
.node-power { left: 30px; top: 50px; }
.node-h2 { right: 36px; top: 150px; }
.node-carbon { left: 58px; bottom: 110px; }
.node-molecule { right: 34px; bottom: 40px; border-color: rgba(66, 212, 155, 0.35); }
.visual-center {
  position: absolute; inset: 0; display: grid; place-items: center;
}
.visual-core {
  width: 130px; height: 130px; border-radius: 50%;
  display: grid; place-items: center;
  border: 1px solid rgba(66, 212, 155, 0.35);
  background: radial-gradient(circle, rgba(66, 212, 155, 0.14), rgba(10, 31, 40, 0.7));
  box-shadow: 0 0 70px rgba(66, 212, 155, 0.11);
  text-align: center;
}
.visual-core strong { font-size: 1.1rem; letter-spacing: -0.03em; }
.visual-core small { color: var(--green); display: block; font-size: 0.7rem; margin-top: 3px; }

/* ---------------- FEATURED ---------------- */
.featured-card {
  margin-top: 46px;
  border: 1px solid var(--border);
  background: #ffffff;
  border-radius: var(--radius);
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  box-shadow: var(--shadow);
}
.featured-content { padding: 50px; }
.featured-label {
  color: var(--cyan);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 800;
  margin-bottom: 18px;
}
.featured-card h3 {
  font-size: clamp(1.9rem, 3vw, 3.05rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
  margin-bottom: 20px;
}
.featured-card p {
  color: var(--muted);
  margin-bottom: 25px;
  max-width: 650px;
}
.featured-meta {
  display: flex;
  gap: 18px;
  color: var(--muted-2);
  font-size: 0.82rem;
  margin: -8px 0 24px;
}
.text-link { color: var(--green); font-weight: 700; }
.text-link:hover { text-decoration: underline; }
.featured-visual {
  min-height: 380px;
  background:
    radial-gradient(circle at 25% 20%, rgba(93, 166, 255, 0.24), transparent 28%),
    radial-gradient(circle at 70% 80%, rgba(66, 212, 155, 0.22), transparent 32%),
    #0b202b;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.featured-visual img { width: 100%; height: 100%; object-fit: cover; }
.featured-empty { grid-template-columns: 1fr; }
.balance {
  width: 70%;
  height: 3px;
  background: rgba(255, 255, 255, 0.65);
  position: relative;
}
.balance::before {
  content: "";
  position: absolute;
  width: 3px;
  height: 115px;
  background: rgba(255, 255, 255, 0.55);
  left: 50%;
  top: -56px;
}
.balance-label {
  position: absolute;
  font-size: 0.82rem;
  color: var(--muted);
}
.balance-left { left: 5%; top: -45px; }
.balance-right { right: 5%; top: -45px; }

/* ---------------- TOPICS ---------------- */
.topic-grid {
  margin-top: 46px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.topic-card {
  min-height: 270px;
  padding: 28px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--panel);
  transition: 0.25s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: var(--text);
  box-shadow: 0 10px 30px rgba(11, 35, 29, 0.04);
}
.topic-card:hover {
  background: var(--panel-strong);
  transform: translateY(-3px);
}
.topic-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(66, 212, 155, 0.12);
  border: 1px solid rgba(66, 212, 155, 0.2);
  display: grid;
  place-items: center;
  margin-bottom: 22px;
  color: var(--green);
  font-weight: 800;
  font-size: 1.05rem;
}
.topic-icon img { width: 28px; height: 28px; object-fit: contain; }
.topic-number { color: var(--muted-2); font-size: 0.8rem; margin-bottom: 14px; }
.topic-card h3 {
  font-size: 1.25rem;
  margin-bottom: 11px;
  letter-spacing: -0.025em;
}
.topic-card p {
  color: var(--muted);
  font-size: 0.92rem;
}

/* ---------------- CHART ---------------- */
.chart-layout {
  margin-top: 48px;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 32px;
  align-items: center;
}
.chart-panel {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--panel);
  padding: 38px;
  box-shadow: 0 10px 30px rgba(11, 35, 29, 0.04);
}
.chart-panel h3 { font-size: 1.5rem; margin-bottom: 9px; }
.chart-panel p { color: var(--muted); margin-bottom: 30px; }
.mock-chart {
  height: 300px;
  position: relative;
  border-left: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin: 15px 10px;
}
.curve {
  position: absolute;
  left: 5%;
  bottom: 8%;
  width: 88%;
  height: 80%;
  border-bottom: 3px solid var(--green);
  border-radius: 0 0 50% 0;
  transform: skewY(-16deg);
  opacity: 0.9;
}
.curve.secondary { border-color: var(--blue); transform: skewY(15deg); opacity: 0.72; }
.chart-note { font-size: 0.82rem; color: var(--muted-2); margin-top: 15px; }

/* SVG chart (replaces .mock-chart decorative curves) */
.chart-figure { margin: 16px 0 12px; }
.chart-svg { width: 100%; height: auto; max-height: 360px; display: block; }
.chart-grid line { stroke: var(--border); stroke-width: 0.5; }
.chart-axis { stroke: var(--text); stroke-width: 1; fill: none; }
.chart-axis-title { font-size: 10px; fill: var(--muted); font-family: inherit; }
.chart-axis-text { font-size: 10px; fill: var(--muted); font-family: inherit; }
.chart-line { fill: none; stroke-width: 2.5; stroke-linecap: round; }
.chart-line-bio { stroke: #4d8cf0; }
.chart-line-e   { stroke: #2cb286; }
.chart-dot { stroke: #fff; stroke-width: 1.5; }
.chart-dot-bio { fill: #4d8cf0; }
.chart-dot-e   { fill: #2cb286; }
.chart-crossover { stroke: var(--muted-2); stroke-width: 1; stroke-dasharray: 4 4; }
.chart-crossover-dot { fill: var(--text); }
.chart-crossover-label { font-size: 10px; fill: var(--text); font-family: inherit; font-weight: 600; }
.chart-legend-text { font-size: 11px; fill: var(--text); font-family: inherit; }
.idea-copy h3 {
  font-size: clamp(2rem, 4vw, 3.6rem);
  line-height: 1.06;
  letter-spacing: -0.045em;
  margin-bottom: 25px;
}
.idea-copy p {
  color: var(--muted);
  font-size: 1.05rem;
  margin-bottom: 18px;
  max-width: 600px;
}

/* ---------------- CHINA × GLOBAL ---------------- */
.china-global { position: relative; overflow: hidden; }
.china-global-box {
  border-radius: 28px;
  border: 1px solid var(--border);
  padding: 60px;
  background:
    radial-gradient(circle at 90% 10%, rgba(63, 158, 126, 0.2), transparent 34%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.94), rgba(225, 239, 234, 0.86));
  box-shadow: var(--shadow);
}
.china-global-box h2 { max-width: 850px; }
.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}
.pill {
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.88rem;
}

/* ---------------- INSIGHTS (Latest) ---------------- */
.insights-grid {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.archive-intro { margin-top: 18px; }
.insight-card {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--panel);
  overflow: hidden;
  transition: 0.25s ease;
  display: flex;
  flex-direction: column;
  color: var(--text);
  box-shadow: 0 10px 30px rgba(11, 35, 29, 0.04);
}
.insight-card:hover {
  background: var(--panel-strong);
  transform: translateY(-3px);
}
.insight-cover {
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #14323f, #0b1a23);
  position: relative;
  overflow: hidden;
}
.insight-cover img { width: 100%; height: 100%; object-fit: cover; }
.insight-cover-fallback {
  display: grid;
  place-items: center;
  color: var(--muted-2);
  font-size: 0.85rem;
  height: 100%;
}
.insight-body { padding: 22px; flex: 1; display: flex; flex-direction: column; gap: 10px; }
.insight-tag {
  color: var(--green);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 700;
}
.insight-card h3 { font-size: 1.05rem; line-height: 1.3; margin: 4px 0 6px; }
.insight-meta {
  color: var(--muted-2);
  font-size: 0.78rem;
  display: flex;
  gap: 12px;
  margin-top: auto;
  padding-top: 12px;
}
.next-edition-card {
  min-height: 100%;
  border-style: dashed;
  box-shadow: none;
  justify-content: center;
  padding: 18px;
  background: rgba(255, 255, 255, 0.42);
}
.next-edition-mark {
  width: 48px;
  height: 48px;
  margin: 4px 22px 12px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(12, 143, 98, 0.1);
  color: #0c8f62;
  font-size: 1.7rem;
}
.next-edition-card p { color: var(--muted); font-size: 0.88rem; }

/* ---------------- RESEARCH ---------------- */
.research-grid {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.research-card {
  padding: 30px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  box-shadow: 0 10px 30px rgba(11, 35, 29, 0.035);
}
.research-card small {
  color: var(--green);
  display: block;
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.68rem;
  font-weight: 700;
}
.research-card h3 { font-size: 1.35rem; line-height: 1.25; margin-bottom: 14px; }
.research-card p { color: var(--muted); font-size: 0.92rem; }

/* ---------------- ABOUT ---------------- */
#about {
  background:
    radial-gradient(circle at 22% 35%, rgba(66, 212, 155, 0.11), transparent 28%),
    #081a21;
}
.about-grid {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: 70px;
  align-items: start;
}
.portrait-placeholder {
  aspect-ratio: 4 / 5;
  border-radius: 26px;
  border: 1px solid var(--border);
  background:
    radial-gradient(circle at 60% 25%, rgba(66, 212, 155, 0.16), transparent 30%),
    linear-gradient(135deg, #102a36, #0b1a23);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted-2);
  text-align: center;
  padding: 30px;
  overflow: hidden;
}
.portrait-placeholder img { width: 100%; height: 100%; object-fit: cover; }
.portrait-monogram { display: grid; justify-items: center; gap: 10px; }
.portrait-monogram strong {
  font-size: clamp(4.5rem, 10vw, 7.5rem);
  line-height: 0.9;
  letter-spacing: -0.08em;
  color: var(--green);
}
.portrait-monogram span { color: var(--text); font-weight: 700; }
.portrait-monogram small { color: var(--muted); text-transform: uppercase; letter-spacing: 0.14em; }
.about-copy h2 {
  font-size: clamp(2.5rem, 4vw, 4.3rem);
  line-height: 1;
  letter-spacing: -0.05em;
  margin-bottom: 25px;
}
.about-copy p {
  color: var(--muted);
  font-size: 1.04rem;
  margin-bottom: 18px;
  max-width: 680px;
}
.about-links {
  display: flex;
  gap: 18px;
  margin-top: 30px;
  flex-wrap: wrap;
}

/* ---------------- NEWSLETTER ---------------- */
.newsletter { padding-bottom: 120px; }
.newsletter-box {
  text-align: center;
  padding: 75px 28px;
  border: 1px solid var(--border);
  border-radius: 30px;
  background:
    radial-gradient(circle at 50% 0%, rgba(66, 212, 155, 0.13), transparent 38%),
    rgba(255, 255, 255, 0.025);
}

/* ---------------- READER SUPPORT ---------------- */
.support-section { padding-top: 24px; }
.support-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 34px;
  padding: 38px 42px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #0b2922;
  color: #f4f8fa;
}
.support-card h2 { font-size: clamp(1.7rem, 3vw, 2.6rem); line-height: 1.1; margin-bottom: 10px; }
.support-card p { color: #abc0b9; max-width: 660px; }
.support-card .button { flex: 0 0 auto; }
.newsletter-box h2 {
  font-size: clamp(2.3rem, 4vw, 4.2rem);
  letter-spacing: -0.05em;
  margin-bottom: 16px;
}
.newsletter-box p {
  max-width: 580px;
  color: var(--muted);
  margin: 0 auto 32px;
}
.signup-form {
  display: flex;
  max-width: 560px;
  margin: 0 auto;
  gap: 10px;
}
.signup-form input {
  flex: 1;
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 15px 18px;
  color: var(--text);
  outline: none;
}
.signup-form input::placeholder { color: var(--muted-2); }
.signup-form button { border: none; cursor: pointer; }

/* ---------------- FOOTER ---------------- */
footer {
  border-top: 1px solid var(--border);
  padding: 38px 0 50px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 25px;
  color: var(--muted-2);
  font-size: 0.84rem;
}
.footer-links { display: flex; gap: 20px; }

/* ---------------- ARTICLES / INSIGHTS LIST ---------------- */
.article-list {
  margin-top: 48px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.article-row {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 28px;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  transition: 0.25s ease;
  color: var(--text);
}
.article-row:hover { background: var(--panel-strong); transform: translateY(-2px); }
.article-row-cover {
  aspect-ratio: 16 / 9;
  border-radius: 12px;
  overflow: hidden;
  background: linear-gradient(135deg, #14323f, #0b1a23);
}
.article-row-cover img { width: 100%; height: 100%; object-fit: cover; }
.article-row-body { display: flex; flex-direction: column; gap: 10px; }
.article-row h3 { font-size: 1.4rem; line-height: 1.25; letter-spacing: -0.02em; }
.article-row p { color: var(--muted); font-size: 0.95rem; }
.article-row-meta { color: var(--muted-2); font-size: 0.82rem; display: flex; gap: 14px; }
.topic-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-bottom: 38px;
}
.topic-filter a {
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.86rem;
}
.topic-filter a:hover,
.topic-filter a.is-active { color: #071521; background: var(--green); border-color: var(--green); }

/* ---------------- SINGLE ARTICLE ---------------- */
.article-page { padding: 0 0 110px; }
.article-hero { padding: 96px 0 0; }
.article-kicker-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
}
.issue-badge {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 6px 11px;
  border: 1px solid rgba(66, 212, 155, 0.42);
  border-radius: 999px;
  background: rgba(66, 212, 155, 0.09);
  color: var(--green);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.article-series {
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.article-page h1 {
  max-width: 1080px;
  margin-bottom: 24px;
  font-size: clamp(2.65rem, 5vw, 4.85rem);
  line-height: 1.02;
  letter-spacing: -0.055em;
  text-wrap: balance;
}
.article-dek {
  max-width: 860px;
  color: #c0ced5;
  font-size: clamp(1.1rem, 2vw, 1.32rem);
  line-height: 1.65;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 28px;
  color: var(--muted-2);
  font-size: 0.88rem;
}
.article-meta span:not(:first-child)::before {
  content: "";
  display: inline-block;
  width: 3px;
  height: 3px;
  margin: 0 11px 2px 0;
  border-radius: 50%;
  background: var(--muted-2);
}
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}
.article-tags span {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.76rem;
}
.article-cover {
  margin: 48px 0 0;
}
.article-cover img {
  width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: linear-gradient(135deg, #14323f, #0b1a23);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.24);
}
.article-cover figcaption {
  max-width: 820px;
  margin: 13px 4px 0;
  color: var(--muted-2);
  font-size: 0.78rem;
}
.article-stage { padding-top: 64px; }
.executive-brief {
  display: grid;
  grid-template-columns: minmax(220px, 0.72fr) minmax(0, 1.28fr);
  gap: 44px;
  padding: 38px 42px;
  border: 1px solid rgba(66, 212, 155, 0.28);
  border-radius: 22px;
  background:
    radial-gradient(circle at 0 0, rgba(66, 212, 155, 0.12), transparent 34%),
    rgba(255, 255, 255, 0.035);
}
.executive-brief h2,
.section-minihead h2,
.offtake-copy h2,
.pathways-section h2,
.watchlist h2,
.author-note h2,
.next-issue h2 {
  font-size: clamp(1.65rem, 3vw, 2.3rem);
  line-height: 1.14;
  letter-spacing: -0.035em;
}
.executive-brief ul { list-style: none; }
.executive-brief li {
  position: relative;
  padding: 0 0 15px 27px;
  color: #d7e2e7;
  font-size: 1rem;
}
.executive-brief li:last-child { padding-bottom: 0; }
.executive-brief li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.58em;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 5px rgba(66, 212, 155, 0.1);
}
.key-figures,
.pathways-section { padding: 74px 0 0; }
.section-minihead {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 30px;
}
.section-minihead.has-copy > p {
  max-width: 390px;
  color: var(--muted);
  font-size: 0.95rem;
}
.key-figure-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}
.key-figure-card {
  min-height: 238px;
  padding: 25px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.035);
}
.key-figure-card > strong {
  display: block;
  margin-bottom: 18px;
  color: var(--green);
  font-size: clamp(2.1rem, 4vw, 3.2rem);
  line-height: 1;
  letter-spacing: -0.055em;
}
.key-figure-card p {
  min-height: 88px;
  color: #c7d3d9;
  font-size: 0.91rem;
  line-height: 1.5;
}
.key-figure-card a,
.offtake-figure a {
  color: #91a6af;
  font-size: 0.76rem;
}
.key-figure-card a:hover,
.offtake-figure a:hover { color: var(--green); }
.offtake-figure {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
  gap: 52px;
  align-items: center;
  margin-top: 76px;
  padding: 40px 42px;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: linear-gradient(145deg, rgba(24, 53, 65, 0.72), rgba(8, 27, 38, 0.82));
}
.offtake-copy p {
  margin-top: 15px;
  color: var(--muted);
  font-size: 0.94rem;
}
.offtake-bar {
  display: flex;
  width: 100%;
  height: 38px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 999px;
  background: rgba(255,255,255,0.04);
}
.offtake-firm { background: var(--green); }
.offtake-other { background: #36505c; }
.offtake-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 28px;
  margin-top: 20px;
  color: var(--muted);
  font-size: 0.85rem;
}
.offtake-legend div { display: flex; align-items: center; gap: 8px; }
.offtake-legend strong { color: var(--text); }
.legend-swatch { width: 10px; height: 10px; border-radius: 3px; }
.legend-swatch.is-firm { background: var(--green); }
.legend-swatch.is-other { background: #36505c; }
.offtake-chart figcaption {
  margin-top: 18px;
  color: var(--muted-2);
  font-size: 0.76rem;
}
.pathways-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.pathway-card {
  display: flex;
  min-height: 320px;
  padding: 28px;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: rgba(255,255,255,0.028);
}
.pathway-card > span {
  color: var(--green);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}
.pathway-card h3 {
  margin-top: 14px;
  font-size: 1.35rem;
  line-height: 1.18;
  letter-spacing: -0.025em;
}
.pathway-card > p {
  margin-top: 17px;
  color: var(--muted);
  font-size: 0.91rem;
}
.pathway-lesson {
  margin-top: auto;
  padding-top: 22px;
  border-top: 1px solid var(--border);
  color: #cad6dc;
  font-size: 0.85rem;
}
.pathway-lesson strong {
  display: block;
  margin-bottom: 7px;
  color: var(--muted-2);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.article-layout {
  display: grid;
  grid-template-columns: 230px minmax(0, 780px);
  justify-content: center;
  gap: 76px;
  margin-top: 88px;
}
.article-sidebar-inner {
  position: sticky;
  top: 105px;
}
.sidebar-label {
  margin-bottom: 12px;
  color: var(--muted-2);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}
.article-sidebar nav ul { list-style: none; }
.article-sidebar nav > ul > li { margin-bottom: 10px; }
.article-sidebar nav ul ul { display: none; }
.article-sidebar nav a {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.35;
}
.article-sidebar nav a:hover { color: var(--green); }
.sidebar-rule {
  height: 1px;
  margin: 24px 0;
  background: var(--border);
}
.share-links { display: flex; flex-direction: column; gap: 8px; }
.share-links a { color: #c6d4da; font-size: 0.82rem; }
.share-links a:hover { color: var(--green); }
.sidebar-note {
  margin-top: 26px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 13px;
  color: var(--muted-2);
  font-size: 0.75rem;
  line-height: 1.5;
}
.sidebar-note strong { display: block; margin-bottom: 6px; color: var(--muted); }
.article-main-column { min-width: 0; }
.article-content {
  font-family: Georgia, "Times New Roman", serif;
  color: #d5dfe4;
  font-size: 1.08rem;
  line-height: 1.82;
}
.article-content > p:first-child {
  color: #eef4f6;
  font-size: 1.25rem;
  line-height: 1.65;
}
.article-content h2 {
  margin: 62px 0 20px;
  color: var(--text);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: clamp(1.75rem, 3vw, 2.35rem);
  line-height: 1.18;
  letter-spacing: -0.035em;
  scroll-margin-top: 110px;
  text-wrap: balance;
}
.article-content h3 {
  margin: 38px 0 14px;
  color: var(--text);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1.35rem;
  line-height: 1.25;
  scroll-margin-top: 110px;
}
.article-content p { margin-bottom: 24px; }
.article-content ul,
.article-content ol { margin: 18px 0 26px 24px; }
.article-content li { margin-bottom: 10px; padding-left: 4px; }
.article-content blockquote {
  margin: 36px 0;
  padding: 24px 28px;
  border: 1px solid rgba(66, 212, 155, 0.22);
  border-left: 4px solid var(--green);
  border-radius: 0 16px 16px 0;
  background: rgba(66, 212, 155, 0.06);
  color: #dce7e4;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1.05rem;
  font-style: normal;
}
.article-content strong { color: var(--text); }
.article-content a {
  color: var(--green);
  text-decoration: underline;
  text-decoration-color: rgba(66, 212, 155, 0.35);
  text-underline-offset: 3px;
}
.article-content a:hover { text-decoration-color: var(--green); }
.article-content code {
  padding: 2px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: rgba(66, 212, 155, 0.08);
  color: var(--green);
  font-size: 0.92em;
}
.article-content hr {
  height: 1px;
  margin: 56px 0;
  border: 0;
  background: var(--border);
}
.article-content table {
  width: 100%;
  margin: 28px 0 34px;
  border-collapse: collapse;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.9rem;
}
.article-content th,
.article-content td {
  padding: 12px 14px;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}
.article-content th { color: var(--text); background: rgba(255,255,255,0.045); }
.watchlist,
.author-note,
.next-issue {
  margin-top: 68px;
  padding: 32px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: rgba(255,255,255,0.03);
}
.watchlist ol {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: watch;
}
.watchlist li {
  position: relative;
  padding: 17px 0 17px 48px;
  border-top: 1px solid var(--border);
  color: #c9d5da;
  counter-increment: watch;
}
.watchlist li::before {
  content: counter(watch, decimal-leading-zero);
  position: absolute;
  left: 0;
  color: var(--green);
  font-size: 0.77rem;
  font-weight: 800;
}
.author-note { display: grid; grid-template-columns: 70px minmax(0, 1fr); gap: 22px; }
.author-monogram {
  display: grid;
  width: 64px;
  height: 64px;
  place-items: center;
  border: 1px solid rgba(66,212,155,0.3);
  border-radius: 18px;
  background: rgba(66,212,155,0.08);
  color: var(--green);
  font-weight: 800;
}
.author-portrait {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  border: 1px solid rgba(66,212,155,0.3);
  object-fit: cover;
  align-self: start;
}
.author-note h2 { font-size: 1.35rem; }
.author-note p { margin-top: 8px; color: var(--muted); font-size: 0.9rem; }
.author-note .author-role { color: var(--green); font-size: 0.78rem; }
.next-issue {
  background:
    radial-gradient(circle at 100% 0, rgba(97,216,232,0.12), transparent 34%),
    rgba(255,255,255,0.03);
}
.next-issue p { max-width: 620px; margin: 14px 0 18px; color: var(--muted); }
.article-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 42px; }
.related-insights {
  border-top: 1px solid var(--border);
  background: rgba(3, 14, 22, 0.34);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 34px;
}
.related-card {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: rgba(255,255,255,0.03);
  transition: transform 180ms ease, border-color 180ms ease;
}
.related-card:hover { transform: translateY(-4px); border-color: rgba(66,212,155,0.34); }
.related-card img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.related-card > div { padding: 22px; }
.related-card span {
  color: var(--green);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.related-card h3 { margin-top: 10px; font-size: 1.14rem; line-height: 1.28; }
.related-card p { margin-top: 10px; color: var(--muted); font-size: 0.82rem; }

/* ---------------- STATIC PAGES (Privacy, Terms) ---------------- */
.static-page { padding: 90px 0 100px; }
.static-page h1 {
  font-size: clamp(2.2rem, 4vw, 3.5rem);
  letter-spacing: -0.04em;
  margin-bottom: 18px;
}
.static-page h2 { font-size: 1.4rem; margin: 32px 0 12px; color: var(--text); }
.static-page p, .static-page li { color: var(--muted); margin-bottom: 14px; }
.static-page ul { margin-left: 24px; }
.static-page .updated { color: var(--muted-2); font-size: 0.9rem; margin-bottom: 32px; }

.review-notice { max-width: 900px; margin-top: 26px; padding: 20px 24px; background: rgba(66, 212, 155, .07); border: 1px solid var(--border); border-left: 3px solid var(--green); border-radius: 10px; }
.review-notice strong { color: var(--text); font-size: .95rem; }
.review-notice p { color: var(--muted); margin-top: 8px; line-height: 1.6; font-size: .95rem; }
.review-notice small { display: block; color: var(--muted); margin-top: 8px; }
.insight-meta, .featured-meta, .article-row-meta { flex-wrap: wrap; }
.chart-note a { text-decoration: underline; text-underline-offset: 3px; }

/* Personal research and scoped services */
.brand-byline { display: block; color: var(--muted); font-size: .65rem; font-weight: 500; letter-spacing: .02em; line-height: 1.2; }
.brand { flex-shrink: 0; }
.service-actions, .connect-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; margin-top: 28px; }
.service-intro { padding-top: 72px; padding-bottom: 44px; }
.service-intro h1 { max-width: 920px; font-size: clamp(2.3rem, 5vw, 4.2rem); line-height: 1.12; letter-spacing: -.04em; }
.service-dek { max-width: 780px; margin-top: 24px; color: var(--muted); font-size: 1.15rem; }
.service-body { display: grid; grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr); gap: 60px; padding-bottom: 80px; align-items: start; }
.service-prose { min-width: 0; font-size: 1.05rem; overflow-wrap: anywhere; }
.service-prose h2 { font-size: 1.5rem; margin: 32px 0 16px; line-height: 1.3; }
.service-prose h2:first-child { margin-top: 0; }
.service-prose p, .service-prose ul, .service-prose ol { margin-bottom: 20px; color: var(--muted); }
.service-prose ul, .service-prose ol { padding-left: 24px; }
.service-prose li { margin-bottom: 10px; }
.service-prose strong { color: var(--text); }
.service-prose a { color: var(--cyan); text-decoration: underline; text-underline-offset: 4px; }
.service-contact { padding: 28px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--panel); }
.service-contact h2 { font-size: 1.45rem; line-height: 1.25; margin-bottom: 18px; }
.service-contact p, .service-contact ol { color: var(--muted); margin-bottom: 18px; }
.service-contact ol { padding-left: 22px; }
.service-contact li { margin-bottom: 10px; }
.service-contact .button { width: 100%; text-align: center; justify-content: center; }
.service-contact .contact-hint { font-size: .82rem; margin: 16px 0 0; }
.research-method { padding-bottom: 80px; max-width: 800px; }
.footer-links { flex-wrap: wrap; }
@media (max-width: 920px) {
  .service-body { grid-template-columns: 1fr; gap: 32px; }
}
@media (max-width: 620px) {
  .service-intro { padding-top: 48px; }
  .service-contact { padding: 24px; }
}

/* ---------------- MOBILE ---------------- */
@media (max-width: 920px) {
  .menu-toggle {
    width: 42px;
    height: 42px;
    display: grid;
    place-content: center;
    gap: 5px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: rgba(255,255,255,0.04);
    color: var(--text);
  }
  .menu-toggle span { display: block; width: 19px; height: 2px; background: currentColor; border-radius: 2px; }
  .nav-links {
    display: none;
    position: absolute;
    top: 74px;
    left: 0;
    right: 0;
    padding: 18px 20px 24px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    background: rgba(7,21,33,0.98);
    border-bottom: 1px solid var(--border);
  }
  .nav-links.is-open { display: flex; }
  .nav-links a { padding: 11px 8px; }
  .nav-cta { text-align: center; margin-top: 8px; }
  .hero-grid,
  .featured-card,
  .chart-layout,
  .about-grid { grid-template-columns: 1fr; }
  .hero { min-height: auto; }
  .hero-visual { min-height: 420px; }
  .topic-grid { grid-template-columns: repeat(2, 1fr); }
  .research-grid { grid-template-columns: 1fr; }
  .featured-visual { min-height: 320px; }
  .insights-grid { grid-template-columns: repeat(2, 1fr); }
  .article-row { grid-template-columns: 1fr; }
  .article-row-cover { aspect-ratio: 16 / 9; }
  .support-card { align-items: flex-start; flex-direction: column; }
  .executive-brief { grid-template-columns: 1fr; gap: 24px; }
  .key-figure-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .key-figure-card { min-height: 215px; }
  .offtake-figure { grid-template-columns: 1fr; gap: 30px; }
  .pathways-grid { grid-template-columns: 1fr; }
  .pathway-card { min-height: 260px; }
  .article-layout { grid-template-columns: 1fr; gap: 48px; margin-top: 70px; }
  .article-sidebar-inner { position: static; }
  .article-sidebar nav > ul {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px 20px;
  }
  .sidebar-note { max-width: 620px; }
  .share-links { flex-direction: row; gap: 18px; }
  .related-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 620px) {
  .container { width: min(calc(100% - 28px), var(--max-width)); }
  section { padding: 72px 0; }
  .hero { padding-top: 82px; }
  .hero h1 { font-size: clamp(2.5rem, 10vw, 3.6rem); }
  .topic-grid { grid-template-columns: 1fr; }
  .featured-content, .china-global-box { padding: 30px; }
  .signup-form { flex-direction: column; }
  .signup-form button { justify-content: center; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .insights-grid { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .flow-node { padding: 11px 13px; }
  .node-power { left: 14px; top: 32px; }
  .node-h2 { right: 16px; top: 106px; }
  .node-carbon { left: 16px; bottom: 80px; }
  .node-molecule { right: 14px; bottom: 25px; }
  .featured-content { padding: 28px; }
  .featured-meta { flex-wrap: wrap; }
  .support-card { padding: 28px; }
  .article-hero { padding-top: 78px; }
  .article-page h1 { font-size: 2.55rem; }
  .article-dek { font-size: 1.02rem; }
  .article-meta { gap: 8px 14px; }
  .article-meta span:not(:first-child)::before { display: none; }
  .article-cover { margin-top: 34px; }
  .article-cover img { aspect-ratio: 4 / 3; border-radius: 17px; }
  .article-stage { padding-top: 46px; }
  .executive-brief,
  .offtake-figure { padding: 28px 24px; }
  .section-minihead { align-items: flex-start; flex-direction: column; gap: 16px; }
  .key-figure-grid { grid-template-columns: 1fr; }
  .key-figure-card { min-height: auto; }
  .key-figure-card p { min-height: auto; margin-bottom: 24px; }
  .offtake-legend { align-items: flex-start; flex-direction: column; }
  .pathway-card { min-height: auto; padding: 24px; }
  .pathway-lesson { margin-top: 28px; }
  .article-sidebar nav > ul { grid-template-columns: 1fr; }
  .article-content { overflow-wrap: anywhere; font-size: 1.02rem; }
  .article-content > p:first-child { font-size: 1.14rem; }
  .article-content blockquote { padding: 20px; }
  .chart-panel { padding: 24px 20px; }
  .chart-panel p { margin-bottom: 20px; }
  .watchlist,
  .author-note,
  .next-issue { padding: 26px 22px; }
  .author-note { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}