/* ==========================================================================
   九一制作厂 · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* ==========================================================================
   base
   ========================================================================== */

:root {
  --color-primary: #2C4B7C;
  --color-primary-dark: #223A61;
  --color-primary-soft: #E7EDF6;
  --color-accent: #C05E33;
  --color-accent-soft: #F7E7DE;
  --color-ink: #23272E;
  --color-muted: #5A6170;
  --color-bg: #F6F3ED;
  --color-surface: #FFFFFF;
  --color-line: #E2DCD1;
  --color-line-strong: #CFC7B8;
  --color-dark: #1F2430;
  --color-dark-text: #F6F3ED;

  --container: 1160px;
  --reading: 760px;
  --radius: 4px;
  --radius-sm: 3px;

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  --font-num: "SFMono-Regular", "Menlo", "Consolas", "Liberation Mono", "PingFang SC", "Microsoft YaHei", monospace;

  --shadow-head: 0 2px 10px rgba(35, 39, 46, 0.08);
  --shadow-card: 0 1px 2px rgba(35, 39, 46, 0.04);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--color-ink);
  font-weight: 700;
  line-height: 1.35;
}

h1 {
  font-size: clamp(1.75rem, 3.2vw, 2.5rem);
  line-height: 1.25;
}

h2 {
  font-size: 1.5rem;
  line-height: 1.35;
}

h3 {
  font-size: 1.125rem;
  line-height: 1.45;
}

h4 {
  font-size: 1rem;
  line-height: 1.5;
}

p {
  margin: 0 0 1em;
}

p:last-child {
  margin-bottom: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

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

figure {
  margin: 0;
}

figcaption {
  margin-top: 0.6em;
  color: var(--color-muted);
  font-size: 0.875rem;
  line-height: 1.6;
}

button {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 12px;
  color: #fff;
}

/* ==========================================================================
   layout
   ========================================================================== */

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--color-bg);
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.site-main {
  flex: 1 0 auto;
  display: block;
}

.inner-main {
  padding-bottom: 72px;
}

.section-title {
  position: relative;
  padding-left: 16px;
  margin-bottom: 12px;
}

.section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.28em;
  width: 4px;
  height: 1.05em;
  background-color: var(--color-primary);
  border-radius: 2px;
}

.section-sub,
.section-intro,
.section-desc,
.section-lead {
  max-width: var(--reading);
  margin-bottom: 28px;
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.section-lead a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ==========================================================================
   components — header / navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-line);
  transition: box-shadow 0.2s ease;
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-head);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
}

.brand-logo {
  flex: 0 0 auto;
  color: var(--color-ink);
  font-size: 1.1875rem;
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1;
  padding: 6px 0;
  white-space: nowrap;
}

.brand-logo:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.site-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
  min-width: 0;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-item {
  position: relative;
}

.nav-item > a,
.nav-sub-toggle {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 12px;
  border: 0;
  background: transparent;
  color: var(--color-ink);
  font-size: 0.9375rem;
  line-height: 1.4;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.nav-item > a:hover,
.nav-sub-toggle:hover {
  color: var(--color-primary);
  background-color: var(--color-primary-soft);
  text-decoration: none;
}

.nav-item > a.is-current {
  color: var(--color-primary);
  font-weight: 700;
}

.nav-item > a.is-current::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 1px;
}

.nav-sub-toggle::after {
  content: "";
  width: 0;
  height: 0;
  margin-left: 6px;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  transition: transform 0.2s ease;
}

.nav-has-sub.is-open .nav-sub-toggle::after {
  transform: rotate(180deg);
}

.nav-sub-list {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  z-index: 20;
  min-width: 200px;
  padding: 8px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  box-shadow: 0 8px 20px rgba(35, 39, 46, 0.1);
  display: none;
}

.nav-has-sub.is-open .nav-sub-list {
  display: block;
}

.nav-sub-list li + li {
  margin-top: 2px;
}

.nav-sub-list a {
  display: block;
  padding: 9px 12px;
  color: var(--color-ink);
  font-size: 0.9375rem;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.nav-sub-list a:hover {
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
  text-decoration: none;
}

.header-cta {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  padding: 0 18px;
  background-color: var(--color-primary);
  color: #fff;
  font-size: 0.9375rem;
  border-radius: var(--radius);
  white-space: nowrap;
}

.header-cta:hover {
  background-color: var(--color-primary-dark);
  color: #fff;
  text-decoration: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  background: transparent;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-ink);
  border-radius: 1px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-nav {
  display: none;
  border-top: 1px solid var(--color-line);
  background-color: var(--color-surface);
}

.mobile-nav-list {
  padding: 8px 0 16px;
}

.mobile-nav-list > li > a,
.mobile-sub-toggle {
  display: flex;
  align-items: center;
  width: 100%;
  min-height: 48px;
  padding: 0 24px;
  border: 0;
  background: transparent;
  color: var(--color-ink);
  font-size: 1rem;
  text-align: left;
}

.mobile-nav-list > li > a.is-current {
  color: var(--color-primary);
  font-weight: 700;
}

.mobile-sub-toggle {
  justify-content: space-between;
}

.mobile-sub-toggle::after {
  content: "";
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  transition: transform 0.2s ease;
}

.mobile-sub-toggle[aria-expanded="true"]::after {
  transform: rotate(180deg);
}

.mobile-sub-list {
  padding: 0 0 8px;
  background-color: var(--color-bg);
}

.mobile-sub-list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0 24px 0 40px;
  color: var(--color-ink);
  font-size: 0.9375rem;
}

/* ==========================================================================
   components — breadcrumb / page head
   ========================================================================== */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 22px 24px 0;
  color: var(--color-muted);
  font-size: 0.875rem;
  line-height: 1.6;
}

.breadcrumb a {
  color: var(--color-muted);
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

.breadcrumb-sep {
  color: var(--color-line-strong);
}

.breadcrumb-current {
  color: var(--color-ink);
}

.page-header {
  max-width: var(--container);
  margin: 0 auto;
  padding: 14px 24px 0;
}

.page-title {
  max-width: 900px;
  color: var(--color-ink);
  font-size: clamp(1.75rem, 3.2vw, 2.5rem);
  font-weight: 700;
  line-height: 1.25;
}

.page-head {
  padding: 12px 0 0;
}

.page-head-inner {
  max-width: var(--reading);
  margin: 0;
  padding-left: 0;
  padding-right: 0;
}

.page-head.container {
  padding-left: 24px;
  padding-right: 24px;
}

.page-eyebrow,
.page-kicker {
  margin-bottom: 8px;
  color: var(--color-accent);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-lead,
.page-lede {
  max-width: var(--reading);
  margin-bottom: 10px;
  color: var(--color-ink);
  font-size: 1.0625rem;
  line-height: 1.75;
}

.page-scope {
  max-width: var(--reading);
  margin-bottom: 0;
  padding-bottom: 4px;
  color: var(--color-muted);
  font-size: 0.875rem;
  line-height: 1.7;
}

/* ==========================================================================
   components — buttons / links / lists
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-weight: 700;
  line-height: 1.4;
  text-align: center;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: #fff;
  text-decoration: none;
}

.btn-ghost {
  background-color: transparent;
  border-color: var(--color-line-strong);
  color: var(--color-primary);
}

.btn-ghost:hover {
  background-color: var(--color-primary-soft);
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
  text-decoration: none;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.9375rem;
}

.text-link::after {
  content: "→";
  font-weight: 400;
}

.text-link:hover {
  color: var(--color-primary-dark);
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.9375rem;
}

.link-arrow::after {
  content: "→";
  font-weight: 400;
}

.point-list,
.plain-list,
.advice-list,
.after-list {
  margin: 0;
  padding: 0;
}

.point-list li,
.plain-list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 10px;
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.point-list li::before,
.plain-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 6px;
  height: 6px;
  background-color: var(--color-accent);
  border-radius: 1px;
}

.point-list li:last-child,
.plain-list li:last-child {
  margin-bottom: 0;
}

.link-list li + li {
  margin-top: 10px;
}

.link-list a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-primary);
  font-size: 0.9375rem;
}

.link-list a::after {
  content: "→";
  font-weight: 400;
}

.check-list {
  display: grid;
  gap: 12px;
}

.check-list li {
  position: relative;
  padding-left: 26px;
  color: var(--color-ink);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.42em;
  width: 14px;
  height: 14px;
  border: 2px solid var(--color-primary);
  border-radius: 2px;
}

/* ==========================================================================
   components — figures / media
   ========================================================================== */

.media-figure {
  width: 100%;
}

.media-figure img,
.hero-media img,
.service-figure img,
.direction-figure img,
.path-media img,
.node-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius);
  background-color: var(--color-line);
}

.media-wide {
  margin-bottom: 32px;
}

.media-frame {
  position: relative;
  width: 100%;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
  background-color: var(--color-line);
}

.ratio-16-9 {
  aspect-ratio: 16 / 9;
}

.media-ratio-3-2 {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
  background-color: var(--color-line);
}

.media-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 40px;
  align-items: center;
  padding: 32px 0;
  border-top: 1px solid var(--color-line);
}

.media-row:first-of-type {
  border-top: 0;
  padding-top: 8px;
}

.media-row-reverse .media-text {
  order: 2;
}

.media-row-reverse .media-figure {
  order: 1;
}

.media-text {
  min-width: 0;
}

.media-text h3 {
  margin-bottom: 10px;
}

.media-text > p {
  color: var(--color-muted);
  font-size: 0.9375rem;
}

.media-figure {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
  background-color: var(--color-line);
}

/* ==========================================================================
   components — faq (index 按钮式)
   ========================================================================== */

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

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

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  min-height: 56px;
  padding: 14px 0;
  border: 0;
  background: transparent;
  color: var(--color-ink);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  text-align: left;
}

.faq-question::after {
  content: "+";
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  line-height: 22px;
  text-align: center;
  color: var(--color-primary);
  border: 1px solid var(--color-line-strong);
  border-radius: 50%;
  font-weight: 400;
}

.faq-question[aria-expanded="true"]::after {
  content: "−";
}

.faq-question:hover {
  color: var(--color-primary);
}

.faq-panel {
  padding: 0 0 18px;
}

.faq-panel p {
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.75;
}

/* ==========================================================================
   components — related links bar
   ========================================================================== */

.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 20px 24px;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.related-links-label {
  color: var(--color-muted);
  font-size: 0.875rem;
}

.related-links-item {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  color: var(--color-primary);
  font-size: 0.875rem;
}

.related-links-item:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-soft);
  text-decoration: none;
}

/* ==========================================================================
   components — footer
   ========================================================================== */

.site-footer {
  flex: 0 0 auto;
  margin-top: 56px;
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-line);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 32px;
  padding-top: 48px;
  padding-bottom: 40px;
}

.footer-col {
  min-width: 0;
}

.footer-brand {
  max-width: 320px;
}

.footer-logo {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--color-ink);
  font-size: 1.125rem;
  font-weight: 700;
}

.footer-logo:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.footer-brand > p {
  margin-bottom: 16px;
  color: var(--color-muted);
  font-size: 0.875rem;
  line-height: 1.75;
}

.footer-heading {
  margin-bottom: 12px;
  color: var(--color-ink);
  font-size: 0.9375rem;
  font-weight: 700;
}

.footer-link-list li + li {
  margin-top: 9px;
}

.footer-link-list a {
  display: inline-block;
  padding: 2px 0;
  color: var(--color-muted);
  font-size: 0.875rem;
  line-height: 1.6;
}

.footer-link-list a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.footer-bottom {
  background-color: var(--color-dark);
  color: var(--color-dark-text);
}

.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 18px;
  padding-bottom: 18px;
}

.footer-copy {
  margin: 0;
  color: var(--color-dark-text);
  font-size: 0.8125rem;
  line-height: 1.6;
}

.back-top {
  color: var(--color-dark-text);
  font-size: 0.8125rem;
}

.back-top:hover {
  color: #fff;
}

/* ==========================================================================
   pages — index
   ========================================================================== */

.hero {
  padding: 40px 0 8px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 58fr) minmax(0, 42fr);
  gap: 48px;
  align-items: center;
}

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

.hero-tag {
  display: inline-block;
  margin-bottom: 16px;
  padding: 4px 12px;
  background-color: var(--color-accent-soft);
  color: var(--color-accent);
  font-size: 0.8125rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
}

.hero-content h1 {
  margin-bottom: 16px;
  color: var(--color-ink);
}

.hero-lead {
  max-width: 560px;
  margin-bottom: 28px;
  color: var(--color-muted);
  font-size: 1.0625rem;
  line-height: 1.75;
}

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

.hero-media {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
  background-color: var(--color-line);
}

.quick-index {
  padding: 48px 0 8px;
}

.quick-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.quick-card {
  display: flex;
  flex-direction: column;
  padding: 22px 22px 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.quick-card h3 {
  margin-bottom: 8px;
}

.quick-card p {
  flex: 1 1 auto;
  margin-bottom: 16px;
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.9375rem;
}

.card-link::after {
  content: "→";
  font-weight: 400;
}

.services {
  padding: 48px 0 8px;
}

.compare {
  padding: 48px 0 8px;
}

.compare-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.compare-card {
  padding: 22px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.compare-card h3 {
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-line);
}

.compare-dl {
  margin: 0;
}

.compare-dl dt {
  margin-top: 12px;
  color: var(--color-accent);
  font-size: 0.8125rem;
  font-weight: 700;
}

.compare-dl dt:first-child {
  margin-top: 0;
}

.compare-dl dd {
  margin: 2px 0 0;
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.compare-conclusion {
  margin-top: 24px;
  padding: 22px 24px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius);
}

.compare-conclusion h3 {
  margin-bottom: 8px;
}

.compare-conclusion p {
  max-width: var(--reading);
  margin-bottom: 12px;
  color: var(--color-muted);
  font-size: 0.9375rem;
}

.directions {
  padding: 48px 0 8px;
}

.direction-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.direction-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  color: var(--color-ink);
}

.direction-card:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-soft);
  text-decoration: none;
}

.direction-name {
  color: var(--color-ink);
  font-size: 1rem;
  font-weight: 700;
}

.direction-desc {
  color: var(--color-muted);
  font-size: 0.8125rem;
  line-height: 1.6;
}

.process-axis {
  padding: 48px 0 8px;
}

.axis-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 24px;
  counter-reset: axis;
}

.axis-node {
  position: relative;
  padding: 20px 16px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-top: 3px solid var(--color-primary);
  border-radius: var(--radius);
}

.axis-num {
  display: block;
  margin-bottom: 8px;
  color: var(--color-accent);
  font-family: var(--font-num);
  font-size: 0.875rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.axis-node h3 {
  margin-bottom: 6px;
  font-size: 1rem;
}

.axis-node p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.875rem;
  line-height: 1.65;
}

.home-faq {
  padding: 48px 0 8px;
}

.home-faq .faq-list {
  max-width: var(--reading);
}

.entry-cards {
  padding: 48px 0 16px;
}

.entry-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 24px;
}

.entry-prepare,
.entry-links {
  padding: 26px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.entry-prepare h2,
.entry-links h2 {
  margin-bottom: 12px;
  font-size: 1.25rem;
}

.entry-prepare > p {
  margin-bottom: 18px;
  color: var(--color-muted);
  font-size: 0.9375rem;
}

.entry-links .link-list {
  margin-top: 4px;
}

/* ==========================================================================
   pages — services
   ========================================================================== */

.anchor-index {
  padding: 24px 0 8px;
}

.anchor-index-inner {
  padding-left: 24px;
  padding-right: 24px;
}

.anchor-index-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.anchor-index-list a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 14px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  color: var(--color-primary);
  font-size: 0.875rem;
}

.anchor-index-list a:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-soft);
  text-decoration: none;
}

.service-list {
  padding: 40px 0 8px;
}

.service-list > .container > .section-title {
  margin-bottom: 24px;
}

.service-item {
  scroll-margin-top: 88px;
}

.service-index {
  margin-bottom: 6px;
  color: var(--color-accent);
  font-family: var(--font-num);
  font-size: 0.8125rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.service-text h3 {
  margin-bottom: 10px;
}

.service-scene {
  margin-bottom: 16px;
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.service-facts {
  margin: 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--color-line);
}

.service-facts dt {
  margin-top: 10px;
  color: var(--color-ink);
  font-size: 0.8125rem;
  font-weight: 700;
}

.service-facts dt:first-child {
  margin-top: 0;
}

.service-facts dd {
  margin: 2px 0 0;
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.service-figure {
  width: 100%;
}

.material-checklist {
  padding: 40px 0 8px;
}

.checklist-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 28px;
  max-width: 960px;
}

.checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 16px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.checklist-name {
  flex: 0 0 auto;
  color: var(--color-ink);
  font-size: 0.9375rem;
  font-weight: 700;
}

.checklist-use {
  color: var(--color-muted);
  font-size: 0.875rem;
  line-height: 1.65;
}

.checklist-note {
  margin-top: 18px;
  color: var(--color-muted);
  font-size: 0.875rem;
}

.next-step {
  padding: 40px 0 8px;
}

.next-step-cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.next-step-col {
  padding: 24px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.next-step-col h3 {
  margin-bottom: 10px;
}

.next-step-col p {
  margin-bottom: 14px;
  color: var(--color-muted);
  font-size: 0.9375rem;
}

/* ==========================================================================
   pages — work
   ========================================================================== */

.direction-tabs {
  padding: 24px 0 8px;
}

.direction-tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.direction-tab {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 14px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  color: var(--color-primary);
  font-size: 0.875rem;
}

.direction-tab:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-soft);
  text-decoration: none;
}

.direction-blocks {
  padding: 40px 0 8px;
}

.direction-block {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 32px;
  padding: 28px 0;
  border-top: 1px solid var(--color-line);
  scroll-margin-top: 88px;
}

.direction-block:first-of-type {
  border-top: 0;
  padding-top: 8px;
}

.direction-block-text {
  min-width: 0;
}

.direction-block-text h3 {
  margin-bottom: 10px;
}

.direction-structure {
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.direction-block-side {
  min-width: 0;
  padding-left: 24px;
  border-left: 1px solid var(--color-line);
}

.side-label {
  margin-bottom: 8px;
  color: var(--color-accent);
  font-size: 0.8125rem;
  font-weight: 700;
}

.direction-block-side .plain-list {
  margin-bottom: 16px;
}

.direction-block-side > p {
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.direction-figure {
  margin: 8px 0 24px;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
  background-color: var(--color-line);
}

.compare-dimensions {
  padding: 40px 0 8px;
}

.dimension-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.dimension-item {
  padding: 18px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.dimension-item h3 {
  margin-bottom: 8px;
  font-size: 1rem;
}

.dimension-item p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.875rem;
  line-height: 1.65;
}

.choice-advice {
  padding: 40px 0 8px;
}

.choice-advice > p {
  max-width: var(--reading);
  color: var(--color-muted);
  font-size: 0.9375rem;
}

.advice-list {
  display: grid;
  gap: 10px;
  max-width: var(--reading);
  margin: 16px 0;
}

.advice-list li {
  position: relative;
  padding-left: 20px;
  color: var(--color-ink);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.advice-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  background-color: var(--color-accent);
  border-radius: 1px;
}

.advice-next {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 16px;
}

.advice-next a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-primary);
  font-size: 0.9375rem;
  font-weight: 700;
}

.advice-next a::after {
  content: "→";
  font-weight: 400;
}

/* ==========================================================================
   pages — process
   ========================================================================== */

.node-section {
  padding: 40px 0 8px;
}

.node-inner {
  padding-left: 24px;
  padding-right: 24px;
}

.node-figure {
  margin: 0 0 32px;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
  background-color: var(--color-line);
}

.node-list {
  position: relative;
  max-width: 960px;
}

.node-item {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 28px;
  padding: 24px 0;
  border-top: 1px solid var(--color-line);
  scroll-margin-top: 88px;
}

.node-item:first-child {
  border-top: 0;
  padding-top: 8px;
}

.node-marker {
  min-width: 0;
}

.node-index {
  display: block;
  margin-bottom: 6px;
  color: var(--color-accent);
  font-family: var(--font-num);
  font-size: 0.8125rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.node-name {
  font-size: 1.0625rem;
}

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

.node-desc {
  margin-bottom: 12px;
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.node-detail {
  margin: 0;
}

.node-detail dt {
  margin-top: 10px;
  color: var(--color-ink);
  font-size: 0.8125rem;
  font-weight: 700;
}

.node-detail dt:first-child {
  margin-top: 0;
}

.node-detail dd {
  margin: 2px 0 0;
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.blockers-section {
  padding: 40px 0 8px;
}

.blockers-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.blocker-card {
  padding: 22px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.blocker-title {
  margin-bottom: 10px;
  font-size: 1rem;
}

.blocker-desc {
  margin-bottom: 12px;
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.blocker-fix {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--color-line);
  color: var(--color-primary);
  font-size: 0.875rem;
  line-height: 1.7;
}

.related-section {
  padding: 40px 0 8px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.related-card {
  padding: 22px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.related-name {
  margin-bottom: 8px;
  font-size: 1.0625rem;
}

.related-desc {
  margin-bottom: 12px;
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.related-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.9375rem;
}

.related-link::after {
  content: "→";
  font-weight: 400;
}

/* ==========================================================================
   pages — standards
   ========================================================================== */

.section {
  padding: 40px 0 8px;
}

.summary-section {
  padding-top: 32px;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.summary-card {
  padding: 22px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius);
}

.summary-num {
  margin-bottom: 8px;
  color: var(--color-accent);
  font-family: var(--font-num);
  font-size: 0.8125rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.summary-card h3 {
  margin-bottom: 8px;
  font-size: 1rem;
}

.summary-card p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.checklist-section .checklist-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  max-width: none;
}

.check-group {
  padding: 22px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  scroll-margin-top: 88px;
}

.check-group h3 {
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
  font-size: 1rem;
}

.check-list {
  margin: 0;
}

.check-group .check-list {
  display: block;
}

.check-group .check-list dt {
  margin-top: 12px;
  color: var(--color-ink);
  font-size: 0.875rem;
  font-weight: 700;
}

.check-group .check-list dt:first-child {
  margin-top: 0;
}

.check-group .check-list dd {
  margin: 2px 0 0;
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.misconception-section {
  padding-top: 40px;
}

.misconception-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.misconception-card {
  padding: 22px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.misconception-card h3 {
  margin-bottom: 10px;
  font-size: 1rem;
}

.misconception-card > p {
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.fix-note {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--color-line);
}

.fix-label {
  display: inline-block;
  margin-right: 6px;
  padding: 1px 8px;
  background-color: var(--color-accent-soft);
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 2px;
}

/* ==========================================================================
   pages — faq
   ========================================================================== */

.faq-media {
  padding: 24px 0 8px;
}

.faq-media .media-figure {
  max-width: 960px;
}

.group-anchor {
  padding: 20px 0 8px;
}

.group-anchor-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.group-anchor-list a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 14px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  color: var(--color-primary);
  font-size: 0.875rem;
}

.group-anchor-list a:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-soft);
  text-decoration: none;
}

.faq-group {
  padding: 32px 0 8px;
  scroll-margin-top: 88px;
}

.faq-group h2 {
  margin-bottom: 8px;
  padding-left: 16px;
  position: relative;
  font-size: 1.375rem;
}

.faq-group h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.28em;
  width: 4px;
  height: 1.05em;
  background-color: var(--color-primary);
  border-radius: 2px;
}

.faq-group .section-lead {
  max-width: var(--reading);
  margin-bottom: 16px;
  color: var(--color-muted);
  font-size: 0.9375rem;
}

.faq-group .faq-list {
  max-width: 900px;
}

.faq-group .faq-question {
  cursor: pointer;
  list-style: none;
}

.faq-group .faq-question::-webkit-details-marker {
  display: none;
}

.faq-group .faq-question::after {
  content: "+";
}

.faq-group details[open] > .faq-question::after {
  content: "−";
}

.faq-answer {
  padding: 0 0 18px;
}

.faq-answer p {
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.talk-note {
  padding: 40px 0 8px;
}

.talk-note-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 24px;
}

.talk-note-main,
.talk-note-side {
  padding: 24px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.talk-note-main h2 {
  margin-bottom: 10px;
  font-size: 1.25rem;
}

.talk-note-main p {
  color: var(--color-muted);
  font-size: 0.9375rem;
}

.talk-note-side h3 {
  margin-bottom: 12px;
  font-size: 1rem;
}

/* ==========================================================================
   pages — contact
   ========================================================================== */

.prepare-section {
  padding: 32px 0 8px;
}

.prepare-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.prepare-list-col,
.prepare-sample-col {
  min-width: 0;
}

.prepare-list {
  margin: 0;
  display: grid;
  gap: 12px;
}

.prepare-item {
  padding: 18px 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.prepare-num {
  display: inline-block;
  margin-bottom: 6px;
  color: var(--color-accent);
  font-family: var(--font-num);
  font-size: 0.8125rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.prepare-item dt {
  margin-bottom: 4px;
  color: var(--color-ink);
  font-size: 0.9375rem;
  font-weight: 700;
}

.prepare-item dd {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.prepare-sample-col {
  padding: 24px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.sample-title {
  margin-bottom: 8px;
  font-size: 1.125rem;
}

.sample-note {
  margin-bottom: 16px;
  color: var(--color-muted);
  font-size: 0.875rem;
  line-height: 1.7;
}

.sample-structure {
  counter-reset: sample;
  display: grid;
  gap: 14px;
}

.sample-step {
  position: relative;
  padding-left: 34px;
  color: var(--color-ink);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.sample-step::before {
  counter-increment: sample;
  content: counter(sample);
  position: absolute;
  left: 0;
  top: 0.1em;
  width: 24px;
  height: 24px;
  line-height: 22px;
  text-align: center;
  border: 1px solid var(--color-line-strong);
  border-radius: 50%;
  color: var(--color-primary);
  font-family: var(--font-num);
  font-size: 0.8125rem;
  font-weight: 700;
  background-color: var(--color-bg);
}

.path-section {
  padding: 40px 0 8px;
}

.path-media {
  margin-bottom: 24px;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
  background-color: var(--color-line);
}

.path-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.path-card {
  padding: 22px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.path-card h3 {
  margin-bottom: 8px;
  font-size: 1rem;
}

.path-card h3 a {
  color: var(--color-ink);
}

.path-card h3 a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.path-card p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.after-section {
  padding: 40px 0 8px;
}

.after-section > .container > p {
  max-width: var(--reading);
  color: var(--color-muted);
  font-size: 0.9375rem;
}

.after-list {
  display: grid;
  gap: 10px;
  max-width: var(--reading);
  margin: 16px 0;
}

.after-list li {
  position: relative;
  padding-left: 20px;
  color: var(--color-ink);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.after-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  background-color: var(--color-primary);
  border-radius: 1px;
}

.after-note {
  max-width: var(--reading);
  margin-top: 16px;
  padding: 16px 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius);
  color: var(--color-muted);
  font-size: 0.875rem;
  line-height: 1.7;
}

/* ==========================================================================
   pages — 404
   ========================================================================== */

.error-main {
  display: flex;
  align-items: center;
  padding: 72px 0;
}

.error-inner {
  max-width: 760px;
}

.error-code {
  margin-bottom: 8px;
  color: var(--color-accent);
  font-family: var(--font-num);
  font-size: 0.9375rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.error-inner h1 {
  margin-bottom: 14px;
}

.error-lead {
  max-width: 560px;
  margin-bottom: 24px;
  color: var(--color-muted);
  font-size: 1rem;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 40px;
}

.error-paths {
  padding-top: 24px;
  border-top: 1px solid var(--color-line);
}

.error-paths h2 {
  margin-bottom: 14px;
  font-size: 1.125rem;
}

.error-path-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.error-path-list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0 16px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  color: var(--color-primary);
  font-size: 0.9375rem;
}

.error-path-list a:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-soft);
  text-decoration: none;
}

/* ==========================================================================
   responsive
   ========================================================================== */

@media (max-width: 1024px) {
  .header-inner {
    gap: 16px;
  }

  .nav-item > a,
  .nav-sub-toggle {
    padding: 0 9px;
    font-size: 0.875rem;
  }

  .hero-grid {
    gap: 32px;
  }

  .direction-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .axis-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 32px;
  }

  .footer-brand {
    max-width: none;
  }

  .node-item {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 20px;
  }
}

@media (max-width: 900px) {
  .site-nav {
    display: none;
  }

  .header-cta {
    margin-left: auto;
  }

  .nav-toggle {
    display: flex;
  }

  .mobile-nav:not([hidden]) {
    display: block;
  }

  .header-inner {
    height: 64px;
  }
}

@media (max-width: 768px) {
  .container {
    padding-left: 18px;
    padding-right: 18px;
  }

  .header-inner {
    padding: 0 18px;
    gap: 12px;
  }

  .header-cta {
    height: 36px;
    padding: 0 14px;
    font-size: 0.875rem;
  }

  .breadcrumb {
    padding: 16px 18px 0;
  }

  .page-header {
    padding: 10px 18px 0;
  }

  .page-head.container,
  .anchor-index-inner,
  .node-inner {
    padding-left: 18px;
    padding-right: 18px;
  }

  .hero {
    padding: 24px 0 4px;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .hero-content h1 {
    margin-bottom: 12px;
  }

  .hero-lead {
    margin-bottom: 20px;
    font-size: 1rem;
  }

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

  .hero-actions .btn {
    width: 100%;
    min-height: 48px;
  }

  .hero-media {
    aspect-ratio: 16 / 9;
  }

  .quick-index,
  .services,
  .compare,
  .directions,
  .process-axis,
  .home-faq,
  .entry-cards,
  .service-list,
  .material-checklist,
  .next-step,
  .direction-blocks,
  .compare-dimensions,
  .choice-advice,
  .node-section,
  .blockers-section,
  .related-section,
  .section,
  .faq-group,
  .talk-note,
  .prepare-section,
  .path-section,
  .after-section {
    padding-top: 32px;
  }

  .quick-grid,
  .compare-grid,
  .blockers-grid,
  .summary-grid,
  .misconception-grid,
  .path-grid,
  .related-grid,
  .next-step-cols {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .direction-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .axis-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .axis-node {
    padding: 16px 18px;
  }

  .media-row,
  .media-row-reverse {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
    padding: 24px 0;
  }

  .media-row-reverse .media-text,
  .media-row-reverse .media-figure {
    order: 0;
  }

  .media-row .media-figure,
  .media-row-reverse .media-figure {
    order: -1;
  }

  .entry-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .entry-prepare,
  .entry-links {
    padding: 20px;
  }

  .direction-block {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
    padding: 22px 0;
  }

  .direction-block-side {
    padding-left: 0;
    padding-top: 16px;
    border-left: 0;
    border-top: 1px solid var(--color-line);
  }

  .direction-figure {
    margin: 4px 0 20px;
  }

  .dimension-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .checklist-grid,
  .checklist-section .checklist-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .node-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
    padding: 20px 0;
    padding-left: 16px;
    border-left: 2px solid var(--color-line);
  }

  .node-item:first-child {
    border-left: 2px solid var(--color-line);
    padding-top: 12px;
  }

  .node-marker {
    display: flex;
    align-items: baseline;
    gap: 10px;
  }

  .node-index {
    margin-bottom: 0;
  }

  .node-figure {
    margin-bottom: 20px;
  }

  .talk-note-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .prepare-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .prepare-sample-col {
    padding: 20px;
  }

  .faq-group .faq-list {
    max-width: none;
  }

  .faq-group h2 {
    font-size: 1.25rem;
  }

  .error-main {
    padding: 48px 0;
  }

  .error-path-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding-top: 32px;
    padding-bottom: 28px;
  }

  .footer-bottom-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .site-footer {
    margin-top: 40px;
  }
}

@media (max-width: 480px) {
  .container,
  .header-inner {
    padding-left: 14px;
    padding-right: 14px;
  }

  .breadcrumb,
  .page-header {
    padding-left: 14px;
    padding-right: 14px;
  }

  .page-head.container,
  .anchor-index-inner,
  .node-inner {
    padding-left: 14px;
    padding-right: 14px;
  }

  .brand-logo {
    font-size: 1.0625rem;
  }

  .header-cta {
    display: none;
  }

  .nav-toggle {
    margin-left: auto;
  }

  .hero-tag {
    font-size: 0.75rem;
  }

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

  .compare-conclusion {
    padding: 18px;
  }

  .quick-card,
  .compare-card,
  .blocker-card,
  .summary-card,
  .misconception-card,
  .path-card,
  .related-card,
  .check-group,
  .next-step-col,
  .talk-note-main,
  .talk-note-side {
    padding: 18px;
  }

  .anchor-index-list a,
  .direction-tab,
  .group-anchor-list a {
    min-height: 40px;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

/* 程序验收反馈：修复网格孤项 */
@media (min-width: 769px) {
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}