:root {
  --blue: #004bff;
  --blue-dark: #003cc9;
  --ink: #0a0a0a;
  --ink-2: #252a32;
  --muted: #686f7a;
  --line: #e5e8ed;
  --paper: #ffffff;
  --paper-soft: #f5f7fa;
  --navy: #07111f;
  --success: #118653;
  --warning: #b76509;
  --danger: #c33b46;
  --shadow: 0 24px 70px rgba(10, 20, 40, 0.14);
  --header-h: 64px;
}

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

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

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Barlow", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.is-locked {
  overflow: hidden;
}

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

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 10px;
  left: 10px;
  padding: 10px 14px;
  color: #fff;
  background: var(--blue);
  transform: translateY(-150%);
}

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

.reading-progress {
  position: fixed;
  z-index: 220;
  top: var(--header-h);
  right: 0;
  left: 0;
  height: 3px;
  background: rgba(0, 75, 255, 0.12);
}

.reading-progress > span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--blue);
  transform-origin: left center;
}

.site-nav {
  position: fixed;
  z-index: 210;
  top: 0;
  right: 0;
  left: 0;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.97);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1440px, 100%);
  height: 100%;
  margin: 0 auto;
  padding: 0 64px;
}

.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.nav-logo img {
  display: block;
  width: auto;
  height: 29px;
}

.nav-logo span {
  padding-left: 12px;
  color: #555;
  border-left: 1px solid var(--line);
  font-size: 13px;
  letter-spacing: 0.03em;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-actions > a:not(.nav-download) {
  color: #555;
  font-size: 14px;
}

.nav-actions > a:hover {
  color: var(--blue);
}

.nav-download,
.primary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 20px;
  color: #fff;
  background: var(--blue);
  border: 1px solid var(--blue);
  border-radius: 0;
  font-weight: 650;
  letter-spacing: 0.02em;
  transition: background 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.nav-download:hover,
.primary-button:hover {
  color: #fff !important;
  background: var(--blue-dark);
  border-color: var(--blue-dark);
  transform: translateY(-1px);
}

.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  color: #fff;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.45);
  font-weight: 600;
}

.secondary-button:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: 720px;
  margin-top: var(--header-h);
  color: #fff;
  background:
    radial-gradient(circle at 82% 16%, rgba(0, 75, 255, 0.4), transparent 33%),
    linear-gradient(138deg, #07111f 0%, #0a1423 62%, #071c50 100%);
}

.hero::before,
.hero::after {
  position: absolute;
  content: "";
  pointer-events: none;
}

.hero::before {
  top: -20%;
  right: 10%;
  width: 1px;
  height: 150%;
  background: rgba(255, 255, 255, 0.12);
  transform: rotate(28deg);
  box-shadow: 180px 0 rgba(255, 255, 255, 0.07), 360px 0 rgba(255, 255, 255, 0.04);
}

.hero::after {
  right: -100px;
  bottom: -250px;
  width: 680px;
  height: 680px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: min(1240px, calc(100% - 80px));
  margin: 0 auto;
  padding: 98px 0 76px;
}

.hero-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 30px;
  color: rgba(255, 255, 255, 0.56);
  font-size: 13px;
}

.hero-breadcrumb a {
  color: rgba(255, 255, 255, 0.78);
  text-decoration: none;
}

.hero-breadcrumb a:hover {
  color: #fff;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 30px;
  color: #91b5ff;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero-kicker::before {
  width: 28px;
  height: 2px;
  background: var(--blue);
  content: "";
}

.hero h1 {
  max-width: 860px;
  margin: 0;
  font-size: clamp(42px, 6vw, 84px);
  line-height: 1.04;
  letter-spacing: -0.055em;
}

.hero-subtitle {
  max-width: 780px;
  margin: 30px 0 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: clamp(19px, 2.2vw, 28px);
  line-height: 1.55;
}

.hero-description {
  max-width: 720px;
  margin: 22px 0 0;
  color: rgba(255, 255, 255, 0.62);
  font-size: 16px;
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin-top: 38px;
  color: rgba(255, 255, 255, 0.56);
  font-size: 13px;
}

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

.hero-meta span::before {
  width: 5px;
  height: 5px;
  background: #81a9ff;
  border-radius: 50%;
  content: "";
}

.signal-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  max-width: 1240px;
  margin: -1px auto 0;
  background: var(--line);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.signal-card {
  min-height: 188px;
  padding: 34px 30px;
  background: #fff;
}

.signal-card strong {
  display: block;
  color: var(--blue);
  font-size: clamp(30px, 3.1vw, 48px);
  font-weight: 720;
  letter-spacing: -0.045em;
}

.signal-card b {
  display: block;
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.55;
}

.signal-card small {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.scope-note {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 40px;
  width: min(1240px, calc(100% - 80px));
  margin: 70px auto 0;
  padding: 32px 0 38px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.scope-note h2 {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.scope-note p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.9;
}

.mobile-toc-trigger {
  display: none;
}

.guide-shell {
  display: grid;
  grid-template-columns: 252px minmax(0, 820px);
  gap: 72px;
  align-items: start;
  width: min(1240px, calc(100% - 80px));
  margin: 0 auto;
  padding: 82px 0 120px;
}

.chapter-nav {
  position: sticky;
  top: 92px;
  max-height: calc(100vh - 116px);
  overflow: auto;
  padding-right: 18px;
  scrollbar-width: thin;
}

.chapter-nav-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.chapter-nav-head strong {
  font-size: 13px;
  letter-spacing: 0.12em;
}

.chapter-nav-head span {
  color: var(--muted);
  font-size: 12px;
}

.toc-search {
  position: relative;
  margin-bottom: 18px;
}

.toc-search input {
  width: 100%;
  height: 40px;
  padding: 0 36px 0 12px;
  color: var(--ink);
  background: var(--paper-soft);
  border: 1px solid transparent;
  border-radius: 0;
  outline: 0;
  font-size: 13px;
}

.toc-search input:focus {
  background: #fff;
  border-color: var(--blue);
}

.toc-search span {
  position: absolute;
  top: 50%;
  right: 12px;
  color: var(--muted);
  font-size: 12px;
  transform: translateY(-50%);
}

.chapter-nav ol {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.chapter-nav li {
  border-bottom: 1px solid var(--line);
}

.chapter-nav a {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 8px;
  padding: 12px 8px 12px 0;
  color: #59606b;
  font-size: 13px;
  line-height: 1.45;
  transition: color 140ms ease, padding-left 140ms ease;
}

.chapter-nav a span:first-child {
  color: #a4a9b1;
  font-variant-numeric: tabular-nums;
}

.chapter-nav a:hover,
.chapter-nav a.is-active {
  padding-left: 7px;
  color: var(--blue);
}

.chapter-nav a.is-hidden {
  display: none;
}

.toc-download {
  display: block;
  margin-top: 24px;
  padding: 18px;
  color: #fff;
  background: var(--navy);
}

.toc-download small {
  display: block;
  margin-bottom: 8px;
  color: #91b5ff;
  font-size: 11px;
  letter-spacing: 0.08em;
}

.toc-download b {
  font-size: 14px;
  line-height: 1.5;
}

.report-content {
  min-width: 0;
}

.report-chapter {
  padding: 0 0 104px;
  margin: 0 0 94px;
  border-bottom: 1px solid var(--line);
}

.report-chapter:last-child {
  margin-bottom: 0;
  border-bottom: 0;
}

.chapter-title {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  margin: 0 0 42px;
  color: var(--ink);
  font-size: clamp(32px, 4vw, 50px);
  line-height: 1.18;
  letter-spacing: -0.045em;
}

.chapter-label {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 10px;
  color: var(--blue);
  background: rgba(0, 75, 255, 0.08);
  border-left: 3px solid var(--blue);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.1em;
}

.report-chapter h3 {
  margin: 62px 0 22px;
  color: var(--ink);
  font-size: clamp(24px, 3vw, 32px);
  line-height: 1.35;
  letter-spacing: -0.03em;
}

.report-chapter h4 {
  margin: 40px 0 14px;
  color: var(--ink-2);
  font-size: 20px;
  line-height: 1.55;
}

.report-chapter p,
.report-chapter li {
  color: #343a43;
  font-size: 17px;
  line-height: 1.95;
}

.report-chapter p {
  margin: 0 0 22px;
}

.report-chapter ul,
.report-chapter ol {
  margin: 14px 0 28px;
  padding-left: 1.55em;
}

.report-chapter li + li {
  margin-top: 7px;
}

.report-chapter strong {
  color: var(--ink);
  font-weight: 700;
}

.report-chapter a {
  color: var(--blue);
  text-decoration: underline;
  text-decoration-color: rgba(0, 75, 255, 0.28);
  text-underline-offset: 3px;
  overflow-wrap: anywhere;
}

.report-chapter blockquote {
  margin: 32px 0;
  padding: 22px 24px;
  color: #273853;
  background: #f3f7ff;
  border-left: 4px solid var(--blue);
}

.report-chapter blockquote p {
  margin: 0;
  color: inherit;
  font-size: 16px;
}

.report-chapter hr {
  height: 1px;
  margin: 52px 0;
  background: var(--line);
  border: 0;
}

.table-scroll {
  width: 100%;
  margin: 26px 0 34px;
  overflow-x: auto;
  border: 1px solid var(--line);
}

.report-chapter table {
  width: 100%;
  min-width: 650px;
  border-collapse: collapse;
  background: #fff;
}

.report-chapter th,
.report-chapter td {
  padding: 15px 16px;
  vertical-align: top;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.65;
  text-align: left;
}

.report-chapter th:last-child,
.report-chapter td:last-child {
  border-right: 0;
}

.report-chapter tr:last-child td {
  border-bottom: 0;
}

.report-chapter th {
  color: var(--ink);
  background: #f1f4f8;
  font-weight: 700;
}

.footnotes {
  margin-top: 62px;
  padding: 24px 26px;
  background: var(--paper-soft);
  border-top: 2px solid #dce1e8;
}

.footnotes::before {
  display: block;
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  content: "资料来源与口径";
}

.footnotes hr {
  display: none;
}

.footnotes ol {
  margin: 0;
  padding-left: 22px;
}

.footnotes li,
.footnotes p {
  color: #626a75;
  font-size: 12.5px;
  line-height: 1.75;
}

.footnotes p {
  margin-bottom: 10px;
}

.footnote-ref {
  margin-left: 2px;
  text-decoration: none !important;
}

.assessment {
  width: min(1060px, calc(100% - 40px));
  margin: 0 auto 120px;
  padding: 54px;
  background: var(--navy);
  color: #fff;
}

.assessment-head {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 30px;
  align-items: end;
  margin-bottom: 36px;
}

.assessment-kicker {
  color: #91b5ff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.assessment h2 {
  margin: 10px 0 0;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.18;
  letter-spacing: -0.04em;
}

.assessment-head p {
  max-width: 320px;
  margin: 0;
  color: rgba(255, 255, 255, 0.62);
  font-size: 14px;
  line-height: 1.8;
}

.assessment-list {
  display: grid;
  gap: 1px;
  background: rgba(255, 255, 255, 0.13);
  counter-reset: assessment;
}

.assessment-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  padding: 20px 22px;
  background: #0c1929;
  counter-increment: assessment;
}

.assessment-question {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 10px;
  color: rgba(255, 255, 255, 0.88);
  font-size: 14px;
  line-height: 1.65;
}

.assessment-question::before {
  color: #769eff;
  font-variant-numeric: tabular-nums;
  content: counter(assessment, decimal-leading-zero);
}

.assessment-options {
  display: flex;
  gap: 5px;
}

.assessment-options label {
  position: relative;
}

.assessment-options input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.assessment-options span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 54px;
  height: 34px;
  color: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.18);
  font-size: 12px;
}

.assessment-options input:focus-visible + span {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

.assessment-options input:checked + span {
  color: #fff;
  background: var(--blue);
  border-color: var(--blue);
}

.assessment-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 28px;
}

.assessment-status {
  color: rgba(255, 255, 255, 0.58);
  font-size: 13px;
}

.assessment-result {
  display: none;
  margin-top: 30px;
  padding: 28px;
  color: var(--ink);
  background: #fff;
}

.assessment-result.is-visible {
  display: block;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: 22px;
  background: var(--line);
  border: 1px solid var(--line);
}

.result-card {
  padding: 18px;
  background: #fff;
}

.result-card small,
.result-card strong {
  display: block;
}

.result-card small {
  color: var(--muted);
  font-size: 12px;
}

.result-card strong {
  margin-top: 6px;
  font-size: 19px;
}

.result-summary {
  margin: 20px 0 0;
  color: #474d56;
  font-size: 14px;
  line-height: 1.8;
}

.download-band {
  color: #fff;
  background: var(--blue);
}

.download-band-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 50px;
  align-items: center;
  width: min(1240px, calc(100% - 80px));
  margin: 0 auto;
  padding: 76px 0;
}

.download-band small {
  color: rgba(255, 255, 255, 0.68);
  font-weight: 700;
  letter-spacing: 0.12em;
}

.download-band h2 {
  max-width: 720px;
  margin: 12px 0 0;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.2;
  letter-spacing: -0.04em;
}

.download-band p {
  max-width: 720px;
  margin: 16px 0 0;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.8;
}

.download-band .secondary-button {
  min-width: 220px;
  background: #fff;
  border-color: #fff;
  color: var(--blue);
}

.download-band .secondary-button:hover {
  background: #eaf0ff;
}

.site-footer {
  color: rgba(255, 255, 255, 0.65);
  background: #050b13;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 40px;
  width: min(1240px, calc(100% - 80px));
  margin: 0 auto;
  padding: 52px 0;
}

.footer-brand img {
  width: auto;
  height: 28px;
  filter: brightness(0) invert(1);
}

.footer-brand p,
.footer-links {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.8;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 12px 24px;
  margin-top: 0;
}

.footer-links a:hover {
  color: #fff;
}

.modal {
  position: fixed;
  z-index: 500;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal.is-open {
  display: flex;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(3, 8, 15, 0.76);
  backdrop-filter: blur(5px);
}

.modal-panel {
  position: relative;
  z-index: 1;
  width: min(560px, 100%);
  max-height: calc(100vh - 48px);
  overflow: auto;
  padding: 42px;
  background: #fff;
  box-shadow: var(--shadow);
}

.modal-close {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 36px;
  height: 36px;
  color: #777;
  background: transparent;
  border: 0;
  font-size: 25px;
  line-height: 1;
}

.modal-kicker {
  color: var(--blue);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.modal h2 {
  margin: 10px 42px 10px 0;
  font-size: 28px;
  line-height: 1.35;
  letter-spacing: -0.03em;
}

.modal-intro {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-field {
  display: grid;
  gap: 7px;
}

.form-field.is-wide {
  grid-column: 1 / -1;
}

.form-field label {
  color: #32363e;
  font-size: 13px;
  font-weight: 650;
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  min-height: 46px;
  padding: 11px 13px;
  color: var(--ink);
  background: #fff;
  border: 1px solid #d8dce2;
  border-radius: 0;
  outline: 0;
}

.form-field textarea {
  min-height: 84px;
  resize: vertical;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(0, 75, 255, 0.1);
}

.privacy-check {
  display: flex;
  gap: 9px;
  align-items: flex-start;
  margin: 17px 0;
  color: #6b717b;
  font-size: 12px;
  line-height: 1.6;
}

.privacy-check input {
  margin-top: 3px;
}

.form-submit {
  width: 100%;
  min-height: 50px;
  color: #fff;
  background: var(--blue);
  border: 0;
  font-weight: 700;
}

.form-submit:disabled {
  cursor: wait;
  opacity: 0.58;
}

.form-note {
  min-height: 20px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
  text-align: center;
}

.form-note.is-error {
  color: var(--danger);
}

.form-note.is-success {
  color: var(--success);
}

.download-ready {
  display: none;
  margin-top: 22px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.download-ready.is-visible {
  display: block;
}

.download-ready h3 {
  margin: 0 0 12px;
  font-size: 17px;
}

.download-links {
  display: grid;
  gap: 10px;
}

.download-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  color: var(--ink);
  background: var(--paper-soft);
  border: 1px solid var(--line);
  font-size: 13px;
  font-weight: 650;
}

.download-links a:hover {
  color: var(--blue);
  border-color: var(--blue);
}

@media (max-width: 1100px) {
  .nav-inner {
    padding: 0 28px;
  }

  .nav-actions > a:not(.nav-download) {
    display: none;
  }

  .hero-inner,
  .scope-note,
  .guide-shell,
  .download-band-inner,
  .footer-inner {
    width: min(100% - 48px, 980px);
  }

  .signal-grid {
    width: calc(100% - 48px);
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .guide-shell {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 44px;
  }
}

@media (max-width: 820px) {
  :root {
    --header-h: 60px;
  }

  .nav-inner {
    padding: 0 18px;
  }

  .nav-logo span {
    display: none;
  }

  .nav-download {
    min-height: 36px;
    padding: 0 13px;
    font-size: 12px;
  }

  .hero {
    min-height: 0;
  }

  .hero-inner {
    width: calc(100% - 40px);
    padding: 68px 0 62px;
  }

  .hero h1 {
    font-size: clamp(40px, 12vw, 60px);
  }

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

  .signal-grid {
    width: calc(100% - 40px);
  }

  .signal-card {
    min-height: 170px;
    padding: 26px 22px;
  }

  .scope-note {
    grid-template-columns: 1fr;
    gap: 12px;
    width: calc(100% - 40px);
    margin-top: 52px;
  }

  .mobile-toc-trigger {
    position: sticky;
    z-index: 120;
    top: calc(var(--header-h) + 3px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    min-height: 48px;
    padding: 0 20px;
    color: var(--ink);
    background: rgba(255, 255, 255, 0.97);
    border: 0;
    border-bottom: 1px solid var(--line);
    font-size: 13px;
  }

  .guide-shell {
    display: block;
    width: calc(100% - 40px);
    padding-top: 54px;
  }

  .chapter-nav {
    position: fixed;
    z-index: 350;
    top: var(--header-h);
    right: 0;
    bottom: 0;
    left: 0;
    display: none;
    max-height: none;
    padding: 28px 22px 80px;
    background: #fff;
  }

  .chapter-nav.is-open {
    display: block;
  }

  .chapter-nav ol {
    max-width: 560px;
    margin: 0 auto;
  }

  .chapter-nav-head,
  .toc-search,
  .toc-download {
    max-width: 560px;
    margin-right: auto;
    margin-left: auto;
  }

  .report-chapter {
    padding-bottom: 74px;
    margin-bottom: 68px;
  }

  .chapter-title {
    margin-bottom: 32px;
  }

  .report-chapter h3 {
    margin-top: 48px;
  }

  .report-chapter p,
  .report-chapter li {
    font-size: 16px;
    line-height: 1.9;
  }

  .assessment {
    width: 100%;
    margin-bottom: 0;
    padding: 46px 20px;
  }

  .assessment-head {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .assessment-item {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  .assessment-options {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
  }

  .assessment-options span {
    width: 100%;
  }

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

  .download-band-inner {
    grid-template-columns: 1fr;
    width: calc(100% - 40px);
    padding: 58px 0;
  }

  .download-band .secondary-button {
    width: 100%;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    width: calc(100% - 40px);
  }

  .footer-links {
    justify-content: flex-start;
  }
}

@media (max-width: 520px) {
  .signal-grid {
    grid-template-columns: 1fr;
  }

  .signal-card {
    min-height: 0;
  }

  .hero-actions {
    display: grid;
  }

  .hero-actions a,
  .hero-actions button {
    width: 100%;
  }

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

  .form-field.is-wide {
    grid-column: auto;
  }

  .modal {
    align-items: flex-end;
    padding: 0;
  }

  .modal-panel {
    width: 100%;
    max-height: 92vh;
    padding: 34px 20px 28px;
  }

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

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

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }
}

@media print {
  @page {
    size: A4;
    margin: 18mm 16mm 20mm;
  }

  .site-nav,
  .reading-progress,
  .mobile-toc-trigger,
  .chapter-nav,
  .hero-actions,
  .download-band,
  .site-footer,
  .modal,
  .assessment {
    display: none !important;
  }

  .hero {
    min-height: auto;
    margin-top: 0;
    color: #000;
    background: #fff;
    border-bottom: 2px solid #000;
  }

  .hero-inner {
    width: 100%;
    padding: 20mm 0 16mm;
  }

  .hero h1,
  .hero-subtitle,
  .hero-description,
  .hero-meta,
  .hero-kicker {
    color: #000;
  }

  .signal-grid,
  .scope-note,
  .guide-shell {
    width: 100%;
  }

  .guide-shell {
    display: block;
    padding: 18mm 0 0;
  }

  .report-chapter {
    break-before: page;
    padding-bottom: 0;
    margin-bottom: 0;
    border: 0;
  }

  .report-chapter:first-child {
    break-before: auto;
  }

  .chapter-title,
  .report-chapter h3,
  .report-chapter h4 {
    break-after: avoid;
  }

  .table-scroll {
    overflow: visible;
  }

  .report-chapter table {
    min-width: 0;
  }

  .report-chapter a {
    color: #000;
    text-decoration: none;
  }
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}