:root {
  --paper: #f7f5f0;
  --paper-2: #efece4;
  --card: #fdfcf9;
  --ink: #17201f;
  --ink-soft: #454f4d;
  --muted: #7c827e;
  --line: rgba(23, 32, 31, 0.14);
  --line-soft: rgba(23, 32, 31, 0.08);
  --accent: #1f4b3f;      /* deep forest green — single accent */
  --accent-2: #2f6f5d;
  --accent-tint: rgba(31, 75, 63, 0.08);
  --dark: #121917;        /* near-black sections */
  --dark-ink: #eef0ec;
  --pos: #1f4b3f;
  --neg: #8a4b3a;
  --shadow: 0 26px 60px rgba(23, 32, 31, 0.1);
  --max: 1200px;
  --gutter: clamp(22px, 5vw, 72px);
  --serif: "Fraunces", "Noto Serif SC", Georgia, "Songti SC", serif;
  --sans: "Inter", ui-sans-serif, system-ui, -apple-system, "PingFang SC",
    "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

button {
  font: inherit;
}

h1,
h2,
h3 {
  margin: 0;
}

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 28px;
  padding: 18px var(--gutter);
  background: rgba(247, 245, 240, 0.86);
  border-bottom: 1px solid var(--line-soft);
  backdrop-filter: blur(16px);
}

.brand {
  display: grid;
  gap: 2px;
  line-height: 1.1;
}

.brand-en {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.brand-cn {
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(18px, 2.2vw, 34px);
  color: var(--ink-soft);
  font-size: 14px;
  white-space: nowrap;
}

.nav a {
  position: relative;
  padding: 6px 0;
}

.nav a::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 1px;
  background: var(--accent);
  content: "";
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.nav a:hover::after,
.nav a:focus-visible::after {
  transform: scaleX(1);
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid var(--line);
  background: transparent;
  border-radius: 2px;
  cursor: pointer;
}

.menu-button span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--ink);
  transition: transform 180ms ease, opacity 180ms ease;
}

/* ---------- shared layout ---------- */
main {
  overflow: clip;
}

section {
  padding: clamp(72px, 9vw, 128px) var(--gutter);
}

.section-head {
  max-width: var(--max);
  margin: 0 auto clamp(44px, 5vw, 68px);
}

.section-index {
  margin: 0 0 20px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.section-head h2 {
  max-width: 20ch;
  font-family: var(--serif);
  font-size: clamp(30px, 4vw, 52px);
  font-weight: 500;
  line-height: 1.12;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

.section-lede {
  max-width: 62ch;
  margin: 22px 0 0;
  color: var(--ink-soft);
  font-size: clamp(16px, 1.5vw, 19px);
}

.on-dark .section-index {
  color: rgba(238, 240, 236, 0.62);
}

.on-dark h2 {
  color: var(--dark-ink);
}

.on-dark .section-lede {
  color: rgba(238, 240, 236, 0.72);
}

.fine {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.pull-quote {
  max-width: var(--max);
  margin: clamp(36px, 4vw, 56px) auto 0;
  padding: 0 0 0 28px;
  border-left: 2px solid var(--accent);
  font-family: var(--serif);
  font-size: clamp(20px, 2.4vw, 30px);
  font-style: italic;
  font-weight: 400;
  line-height: 1.35;
  color: var(--ink);
}

/* ---------- hero ---------- */
.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: clamp(36px, 5vw, 80px);
  max-width: var(--max);
  margin: 0 auto;
  padding-top: clamp(48px, 6vw, 96px);
  padding-bottom: clamp(56px, 7vw, 104px);
}

.eyebrow {
  margin: 0 0 26px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.hero-title {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(38px, 5.2vw, 74px);
  font-weight: 500;
  line-height: 1.06;
  letter-spacing: -0.015em;
}

.hero-sub {
  max-width: 46ch;
  margin: 26px 0 0;
  color: var(--ink-soft);
  font-size: clamp(16px, 1.6vw, 20px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.btn-primary,
.btn-ghost {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  padding: 0 26px;
  border-radius: 2px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: transform 160ms ease, background-color 160ms ease,
    border-color 160ms ease, color 160ms ease;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--ink);
  transform: translateY(-1px);
}

.btn-ghost {
  border: 1px solid var(--line);
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: clamp(24px, 4vw, 48px);
  margin: clamp(40px, 5vw, 60px) 0 0;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.hero-meta dt {
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero-meta dd {
  margin: 8px 0 0;
  font-family: var(--serif);
  font-size: clamp(15px, 1.4vw, 18px);
  font-weight: 500;
}

.hero-media {
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  border-radius: 3px;
  box-shadow: var(--shadow);
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-media::after {
  position: absolute;
  inset: 0;
  border: 1px solid rgba(255, 255, 255, 0.35);
  content: "";
}

/* ---------- position ---------- */
.position {
  border-top: 1px solid var(--line-soft);
}

.triple {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  max-width: var(--max);
  margin: 0 auto;
  border-top: 1px solid var(--line);
}

.triple.two {
  grid-template-columns: repeat(2, 1fr);
}

.triple article {
  padding: 34px 34px 34px 0;
  border-top: 3px solid var(--accent);
  margin-top: -1px;
}

.triple article + article {
  padding-left: 34px;
  border-left: 1px solid var(--line);
}

.triple-num {
  display: block;
  margin-bottom: 20px;
  font-family: var(--serif);
  font-size: 15px;
  font-style: italic;
  color: var(--accent);
  letter-spacing: 0.08em;
}

.triple h3 {
  font-family: var(--serif);
  font-size: 23px;
  font-weight: 500;
}

.triple p {
  margin: 14px 0 0;
  color: var(--ink-soft);
  font-size: 15px;
}

/* ---------- thesis (dark) ---------- */
.thesis {
  background: var(--dark);
  color: var(--dark-ink);
}

.trend-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  max-width: var(--max);
  margin: 0 auto;
  border-top: 1px solid rgba(238, 240, 236, 0.16);
}

.trend {
  padding: 36px 30px 40px 0;
}

.trend + .trend {
  padding-left: 30px;
  border-left: 1px solid rgba(238, 240, 236, 0.16);
}

.trend-num {
  font-family: var(--serif);
  font-size: 14px;
  font-style: italic;
  color: rgba(238, 240, 236, 0.5);
}

.trend h3 {
  margin: 18px 0 20px;
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 500;
}

.trend-shift {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin: 0;
  font-size: 15px;
  color: rgba(238, 240, 236, 0.9);
}

.trend-shift span:first-child {
  color: rgba(238, 240, 236, 0.52);
  text-decoration: line-through;
  text-decoration-color: rgba(238, 240, 236, 0.3);
}

.trend-shift em {
  color: var(--accent-2);
  font-style: normal;
}

.trend-shift span:last-child {
  font-weight: 600;
}

.trend-note {
  margin: 18px 0 0;
  color: rgba(238, 240, 236, 0.66);
  font-size: 14px;
}

.bridge {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: clamp(20px, 4vw, 48px);
  max-width: var(--max);
  margin: clamp(30px, 4vw, 48px) auto 0;
  padding: 32px 0;
  border-top: 1px solid rgba(238, 240, 236, 0.16);
  border-bottom: 1px solid rgba(238, 240, 236, 0.16);
}

.bridge-side.end {
  text-align: right;
}

.bridge-k {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(19px, 2vw, 26px);
  font-weight: 500;
}

.bridge-v {
  margin: 10px 0 0;
  color: rgba(238, 240, 236, 0.6);
  font-size: 14px;
}

.bridge-mark {
  display: inline-flex;
  width: 56px;
  height: 56px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(238, 240, 236, 0.3);
  border-radius: 999px;
  color: var(--accent-2);
  font-size: 22px;
}

.thesis-foot {
  max-width: var(--max);
  margin: 26px auto 0;
  color: rgba(238, 240, 236, 0.72);
  font-family: var(--serif);
  font-size: clamp(16px, 1.8vw, 20px);
  font-style: italic;
}

/* ---------- principles ---------- */
.principle-table {
  max-width: var(--max);
  margin: 0 auto;
  border-top: 1px solid var(--ink);
}

.pt-head,
.pt-row {
  display: grid;
  grid-template-columns: 1.1fr 1.4fr 1.2fr;
  gap: clamp(16px, 3vw, 44px);
  align-items: baseline;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.pt-head {
  padding: 14px 0;
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.pt-head .pt-pos {
  color: var(--pos);
}

.pt-head .pt-neg {
  color: var(--neg);
}

.pt-name {
  font-family: var(--serif);
  font-size: clamp(17px, 1.7vw, 21px);
  font-weight: 500;
}

.pt-row .pt-pos {
  color: var(--ink-soft);
  font-size: 15px;
}

.pt-row .pt-neg {
  position: relative;
  padding-left: 20px;
  color: var(--neg);
  font-size: 15px;
}

.pt-row .pt-neg::before {
  position: absolute;
  left: 0;
  content: "✕";
  font-size: 11px;
  opacity: 0.7;
}

.pt-row .pt-pos {
  position: relative;
  padding-left: 20px;
}

.pt-row .pt-pos::before {
  position: absolute;
  left: 0;
  color: var(--pos);
  content: "✓";
  font-size: 12px;
}

/* ---------- focus (dark) ---------- */
.focus {
  background: var(--dark);
  color: var(--dark-ink);
}

.focus-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  max-width: var(--max);
  margin: 0 auto;
  background: rgba(238, 240, 236, 0.16);
  border: 1px solid rgba(238, 240, 236, 0.16);
}

.focus-card {
  display: flex;
  flex-direction: column;
  padding: 34px 30px;
  background: var(--dark);
}

.focus-num {
  font-family: var(--serif);
  font-size: 14px;
  font-style: italic;
  color: rgba(238, 240, 236, 0.5);
}

.focus-card h3 {
  margin: 16px 0 0;
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 500;
  line-height: 1.2;
}

.focus-desc {
  margin: 14px 0 0;
  color: rgba(238, 240, 236, 0.68);
  font-size: 14px;
}

.focus-label {
  margin: 26px 0 0;
  color: rgba(238, 240, 236, 0.5);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.focus-card ul {
  display: grid;
  gap: 10px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.focus-card li {
  position: relative;
  padding-left: 16px;
  color: rgba(238, 240, 236, 0.86);
  font-size: 14.5px;
}

.focus-card li::before {
  position: absolute;
  top: 0.62em;
  left: 0;
  width: 5px;
  height: 5px;
  background: var(--accent-2);
  border-radius: 999px;
  content: "";
}

.metric-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
  padding-top: 26px;
}

.metric-tags span {
  padding: 5px 12px;
  border: 1px solid rgba(238, 240, 236, 0.24);
  border-radius: 999px;
  color: rgba(238, 240, 236, 0.82);
  font-size: 12px;
  letter-spacing: 0.02em;
}

.focus-cross {
  max-width: var(--max);
  margin: 26px auto 0;
  padding-top: 22px;
  border-top: 1px solid rgba(238, 240, 236, 0.16);
  color: rgba(238, 240, 236, 0.66);
  font-size: 14px;
}

/* ---------- criteria ---------- */
.criteria-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  max-width: var(--max);
  margin: 0 auto;
  background: var(--line);
  border: 1px solid var(--line);
}

.criteria-grid article {
  padding: 32px 30px;
  background: var(--card);
}

.criteria-grid span {
  font-family: var(--serif);
  font-size: 14px;
  font-style: italic;
  color: var(--accent);
}

.criteria-grid h3 {
  margin: 14px 0 0;
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 500;
}

.criteria-grid p {
  margin: 12px 0 0;
  color: var(--ink-soft);
  font-size: 15px;
}

/* ---------- process ---------- */
.process {
  background: var(--paper-2);
}

.process-line {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  max-width: var(--max);
  margin: 0 auto;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--ink);
}

.process-line li {
  padding: 30px 26px 30px 0;
  border-top: 3px solid transparent;
  margin-top: -1px;
}

.process-line li + li {
  padding-left: 26px;
  border-left: 1px solid var(--line);
}

.process-line span {
  font-family: var(--serif);
  font-size: 26px;
  font-style: italic;
  color: var(--accent);
}

.process-line h3 {
  margin: 18px 0 0;
  min-height: 52px;
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 500;
}

.process-line p {
  margin: 14px 0 0;
  color: var(--ink-soft);
  font-size: 14px;
}

.process-foot {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  max-width: var(--max);
  margin: 20px auto 0;
}

.process-foot div {
  padding: 24px 26px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 2px;
}

.process-foot strong {
  display: block;
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 600;
}

.process-foot p {
  margin: 10px 0 0;
  color: var(--ink-soft);
  font-size: 14px;
}

/* ---------- support (dark) ---------- */
.support {
  background: var(--dark);
  color: var(--dark-ink);
}

.support-top {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  max-width: var(--max);
  margin: 0 auto;
  background: rgba(238, 240, 236, 0.16);
  border: 1px solid rgba(238, 240, 236, 0.16);
}

.support-top article {
  padding: 32px 30px;
  background: var(--dark);
}

.support-top h3 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 500;
}

.support-top p {
  margin: 14px 0 0;
  color: rgba(238, 240, 236, 0.68);
  font-size: 15px;
}

.support-scenes {
  max-width: var(--max);
  margin: 18px auto 0;
  padding: 34px 34px 30px;
  background: rgba(238, 240, 236, 0.05);
  border: 1px solid rgba(238, 240, 236, 0.16);
  border-radius: 2px;
}

.support-scenes h3 {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 500;
  color: rgba(238, 240, 236, 0.85);
}

.support-scenes ul {
  display: grid;
  gap: 14px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.support-scenes li {
  position: relative;
  padding-left: 20px;
  color: rgba(238, 240, 236, 0.84);
  font-size: 15px;
}

.support-scenes li::before {
  position: absolute;
  top: 0.62em;
  left: 0;
  width: 6px;
  height: 6px;
  background: var(--accent-2);
  border-radius: 999px;
  content: "";
}

.support-scenes .fine {
  margin: 22px 0 0;
  color: rgba(238, 240, 236, 0.5);
}

/* ---------- partners ---------- */
.partners-layout {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 18px;
  max-width: var(--max);
  margin: 0 auto;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.value-grid article {
  padding: 30px 28px;
  background: var(--card);
}

.value-grid h3 {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 500;
}

.value-grid p {
  margin: 12px 0 0;
  color: var(--ink-soft);
  font-size: 14.5px;
}

.partner-note {
  display: flex;
  flex-direction: column;
  padding: 32px 30px;
  background: var(--accent);
  color: #fff;
  border-radius: 2px;
}

.partner-note h3 {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 500;
}

.partner-note ul {
  display: grid;
  gap: 14px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.partner-note li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  color: rgba(255, 255, 255, 0.9);
}

.partner-note li::before {
  position: absolute;
  top: 0.62em;
  left: 0;
  width: 5px;
  height: 5px;
  background: rgba(255, 255, 255, 0.7);
  border-radius: 999px;
  content: "";
}

.partner-line {
  margin: 26px 0 0;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.24);
  font-family: var(--serif);
  font-size: 17px;
  font-style: italic;
  color: #fff;
}

/* ---------- contact ---------- */
.contact {
  background: var(--paper-2);
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.42fr 0.58fr;
  gap: 18px;
  max-width: var(--max);
  margin: 0 auto;
  align-items: stretch;
}

.contact-qr-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  padding: 34px 30px;
  background: var(--dark);
  color: var(--dark-ink);
  border-radius: 2px;
}

.contact-label {
  margin: 0;
  align-self: flex-start;
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.contact-qr-card .contact-label {
  color: rgba(238, 240, 236, 0.6);
}

.wechat-qr {
  width: min(230px, 100%);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  padding: 16px;
  background: #ffffff;
  border-radius: 4px;
}

.wechat-qr img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.contact-qr-note {
  margin: 0;
  color: rgba(238, 240, 236, 0.7);
  font-size: 13px;
}

.contact-details {
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 18px;
}

.contact-block {
  padding: 30px 30px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 2px;
}

.contact-email {
  display: inline-block;
  margin: 14px 0 0;
  font-family: var(--serif);
  font-size: clamp(20px, 2.2vw, 27px);
  font-weight: 500;
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color 160ms ease;
}

.contact-email:hover {
  border-color: var(--accent);
}

.contact-hint {
  margin: 14px 0 0;
  color: var(--ink-soft);
  font-size: 14.5px;
}

.office-list {
  display: grid;
  gap: 0;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.office-list li {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-top: 1px solid var(--line-soft);
}

.office-list li:first-of-type {
  padding-top: 0;
  border-top: 0;
}

.office-list strong {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
}

.office-list span {
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.5;
}

.legal {
  max-width: var(--max);
  margin: clamp(36px, 4vw, 56px) auto 0;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.legal strong {
  display: block;
  margin-bottom: 10px;
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 600;
}

.legal p {
  margin: 0;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.6;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ---------- responsive ---------- */
@media (max-width: 1000px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-media {
    order: -1;
    aspect-ratio: 16 / 10;
  }

  .partners-layout,
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 820px) {
  .menu-button {
    display: inline-flex;
  }

  .site-header {
    grid-template-columns: 1fr auto;
  }

  .nav {
    position: fixed;
    top: 74px;
    right: var(--gutter);
    left: var(--gutter);
    display: grid;
    gap: 0;
    padding: 8px 16px;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 2px;
    box-shadow: var(--shadow);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 160ms ease, transform 160ms ease;
  }

  .nav a {
    padding: 14px 0;
    border-bottom: 1px solid var(--line-soft);
  }

  .nav a:last-child {
    border-bottom: 0;
  }

  .site-header.nav-open .nav {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .site-header.nav-open .menu-button span:first-child {
    transform: translateY(4px) rotate(45deg);
  }

  .site-header.nav-open .menu-button span:last-child {
    transform: translateY(-4px) rotate(-45deg);
  }

  .triple,
  .trend-row,
  .focus-grid,
  .criteria-grid,
  .support-top,
  .value-grid,
  .process-line,
  .process-foot {
    grid-template-columns: 1fr;
  }

  .triple article,
  .triple article + article,
  .trend,
  .trend + .trend,
  .process-line li,
  .process-line li + li {
    padding: 26px 0;
    border-left: 0;
  }

  .triple article + article,
  .process-line li + li {
    border-top: 1px solid var(--line);
  }

  .trend + .trend {
    border-top: 1px solid rgba(238, 240, 236, 0.16);
  }

  .pt-head {
    display: none;
  }

  .pt-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .bridge {
    grid-template-columns: 1fr;
    gap: 18px;
    text-align: left;
  }

  .bridge-side.end {
    text-align: left;
  }

  .bridge-mark {
    transform: rotate(90deg);
  }
}

@media (max-width: 520px) {
  .hero-meta {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-primary,
  .btn-ghost {
    justify-content: center;
  }
}

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