:root {
  --bg: #f5f6f7;
  --surface: #ffffff;
  --surface-alt: #eef0f2;
  --text: #1f2328;
  --text-muted: #57606a;
  --border: #d0d7de;
  --border-strong: #b6bec6;
  --accent: #0969da;
  --accent-soft: rgba(9, 105, 218, 0.08);
  --success: #1a7f37;
  --success-soft: rgba(26, 127, 55, 0.08);
  --radius: 6px;
  --radius-sm: 4px;
  --shadow: 0 1px 2px rgba(31, 35, 40, 0.06);
  --font-mono: "SFMono-Regular", "SF Mono", Menlo, Consolas, "Liberation Mono", "Courier New", monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --container: 1120px;
  --content-max: 760px;
  --gap: 24px;
}

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

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

body.site-body {
  margin: 0;
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
}

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

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

a:hover,
a:focus-visible {
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

h1,
h2,
h3,
h4 {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-weight: 600;
  line-height: 1.3;
  color: var(--text);
}

h1 {
  font-size: 32px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 18px;
}

p {
  margin: 0 0 14px;
}

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

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

figure {
  margin: 0;
}

figcaption {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.6;
}

table {
  border-collapse: collapse;
  width: 100%;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 10px 16px;
  background-color: var(--surface);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  color: var(--accent);
}

.skip-link:focus {
  left: 16px;
  top: 12px;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--surface);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 14px 24px;
}

.brand {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0;
}

.brand::before {
  content: "$ ";
  color: var(--success);
}

.brand:hover,
.brand:focus-visible {
  text-decoration: none;
  color: var(--accent);
}

.site-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: flex-end;
}

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

.nav-list > li {
  display: block;
}

.nav-link {
  display: inline-block;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.4;
}

.nav-link:hover,
.nav-link:focus-visible {
  background-color: var(--surface-alt);
  color: var(--text);
  text-decoration: none;
}

.nav-link.is-current {
  color: var(--accent);
  font-weight: 600;
  box-shadow: inset 0 -2px 0 var(--accent);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
}

.nav-toggle:hover {
  border-color: var(--border-strong);
}

.nav-toggle::before {
  content: "≡";
}

.site-main {
  display: block;
}

.home-main {
  padding-bottom: 8px;
}

.inner-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px 64px;
}

.section-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section-head {
  max-width: var(--content-max);
  margin-bottom: 24px;
}

.section-title {
  margin-bottom: 10px;
}

.section-lead {
  margin: 0;
  color: var(--text-muted);
  font-size: 15px;
}

.section-desc {
  margin: 0 0 20px;
  color: var(--text-muted);
  font-size: 15px;
}

.section-intro {
  margin: 0 0 20px;
  color: var(--text-muted);
  font-size: 15px;
}

.section-more {
  margin: 20px 0 0;
}

.text-link {
  display: inline-block;
  font-size: 15px;
  font-weight: 600;
}

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

.button-link {
  display: inline-block;
  padding: 11px 20px;
  background-color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  color: #ffffff;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
}

.button-link:hover,
.button-link:focus-visible {
  background-color: #0857b3;
  border-color: #0857b3;
  color: #ffffff;
  text-decoration: none;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding: 20px 0 0;
  color: var(--text-muted);
  font-size: 14px;
}

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

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--accent);
}

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

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

.page-header {
  max-width: var(--content-max);
  padding: 24px 0 32px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
}

.page-title {
  margin-bottom: 12px;
  font-size: 32px;
  font-weight: 600;
  color: var(--text);
}

.page-description {
  margin: 0;
  color: var(--text-muted);
  font-size: 16px;
}

.site-footer {
  margin-top: 48px;
  background-color: var(--surface);
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(220px, 1.4fr) repeat(3, minmax(140px, 1fr));
  gap: 32px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 40px 24px 28px;
}

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

.footer-name {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
}

.footer-slogan {
  margin: 0 0 10px;
  color: var(--success);
  font-size: 14px;
}

.footer-desc {
  margin: 0;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.7;
}

.footer-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  text-transform: none;
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-list a {
  color: var(--text-muted);
  font-size: 14px;
}

.footer-list a:hover,
.footer-list a:focus-visible {
  color: var(--accent);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 16px 24px 28px;
  border-top: 1px solid var(--border);
}

.footer-copy {
  margin: 0;
  color: var(--text-muted);
  font-size: 13px;
}

.back-top {
  display: inline-block;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 13px;
}

.back-top:hover,
.back-top:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

/* ===== components ===== */

/* 首页 hero */
.hero {
  background-color: var(--surface);
  border-bottom: 1px solid var(--border);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 40px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 56px 24px 48px;
  align-items: start;
}

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

.hero-eyebrow {
  margin: 0 0 12px;
  color: var(--success);
  font-family: var(--font-mono);
  font-size: 14px;
}

.hero-title {
  margin: 0 0 16px;
  font-size: 40px;
  line-height: 1.25;
}

.hero-lead {
  max-width: 520px;
  margin: 0 0 24px;
  color: var(--text-muted);
  font-size: 16px;
}

.hero-media {
  margin: 0;
  max-width: 560px;
}

.hero-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background-color: var(--surface-alt);
}

.hero-media figcaption {
  margin-top: 10px;
}

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

.scenes-title {
  margin: 0 0 16px;
  font-size: 18px;
  color: var(--text-muted);
  font-weight: 600;
}

.scene-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.scene-item {
  min-width: 0;
}

.scene-link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  height: 100%;
  padding: 18px;
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
}

.scene-link:hover,
.scene-link:focus-visible {
  border-color: var(--accent);
  background-color: var(--accent-soft);
  text-decoration: none;
}

.scene-name {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

.scene-desc {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.6;
}

/* 首页服务方向总览 */
.service-directions,
.cooperation-steps,
.materials,
.scenes,
.faq,
.contact-entry {
  padding: 48px 0;
  border-bottom: 1px solid var(--border);
}

.contact-entry {
  border-bottom: 0;
}

.direction-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--border);
}

.direction-row {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.3fr) minmax(0, 1.2fr);
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
  min-width: 0;
}

.direction-name {
  margin: 0;
  font-size: 17px;
  color: var(--text);
}

.direction-audience,
.direction-delivery {
  margin: 0;
  color: var(--text-muted);
  font-size: 15px;
}

/* 首页合作流程概览 */
.step-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--border);
}

.cooperation-steps .step-item {
  display: grid;
  grid-template-columns: 56px minmax(140px, 1fr) minmax(0, 2.2fr);
  gap: 16px;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  min-width: 0;
}

.cooperation-steps .step-no {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--success);
}

.cooperation-steps .step-name {
  margin: 0;
  font-size: 16px;
}

.cooperation-steps .step-desc {
  margin: 0;
  color: var(--text-muted);
  font-size: 15px;
}

/* 首页资料类型说明 */
.material-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.materials .material-col {
  min-width: 0;
  padding: 20px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.materials .material-name {
  margin: 0 0 10px;
  font-size: 17px;
}

.materials .material-use {
  margin: 0 0 10px;
  color: var(--text);
  font-size: 15px;
}

.materials .material-limit {
  margin: 0;
  padding-top: 10px;
  border-top: 1px dashed var(--border);
  color: var(--text-muted);
  font-size: 14px;
}

/* 首页场景图片 */
.scene-media-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.scene-media {
  min-width: 0;
  margin: 0;
}

.scene-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background-color: var(--surface-alt);
}

.scene-media figcaption {
  margin-top: 10px;
}

/* 首页 FAQ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.faq-item {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  flex: 0 0 auto;
  font-size: 20px;
  line-height: 1;
  color: var(--text-muted);
}

.faq-item[open] .faq-question::after {
  content: "−";
  color: var(--accent);
}

.faq-item[open] .faq-question {
  border-bottom: 1px solid var(--border);
}

.faq-answer {
  padding: 16px 20px;
}

.faq-answer p {
  margin: 0;
  color: var(--text-muted);
  font-size: 15px;
}

/* 首页合作入口 */
.contact-entry .section-inner {
  max-width: var(--content-max);
}

.entry-text {
  margin: 0 0 20px;
  color: var(--text-muted);
  font-size: 16px;
}

.entry-links {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  margin: 0;
}

/* 内页主图与说明 */
.main-visual {
  margin-bottom: 40px;
}

.visual-figure {
  margin: 0 0 20px;
}

.visual-image {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background-color: var(--surface-alt);
}

.visual-caption {
  margin-top: 10px;
}

.visual-summary {
  max-width: var(--content-max);
}

.visual-summary p {
  color: var(--text-muted);
  font-size: 15px;
}

/* 内页字段表 */
.direction-table {
  margin-bottom: 40px;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background-color: var(--surface);
}

.field-table {
  min-width: 640px;
  font-size: 15px;
}

.table-caption {
  padding: 14px 16px;
  text-align: left;
  color: var(--text-muted);
  font-size: 14px;
  border-bottom: 1px solid var(--border);
}

.field-table th,
.field-table td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border);
}

.field-table thead th {
  background-color: var(--surface-alt);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}

.field-table tbody th {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}

.field-table tbody td {
  color: var(--text-muted);
}

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

/* 内页方向说明 */
.direction-notes {
  margin-bottom: 40px;
}

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

.note-item {
  min-width: 0;
  padding: 20px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.note-title {
  margin: 0 0 10px;
  font-size: 17px;
}

.note-item p {
  color: var(--text-muted);
  font-size: 15px;
}

/* 内页合作准备事项 */
.preparation {
  margin-bottom: 40px;
}

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

.prep-item {
  min-width: 0;
  padding: 18px 20px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--success);
  border-radius: var(--radius);
}

.prep-name {
  margin: 0 0 8px;
  font-size: 16px;
}

.prep-item p {
  margin: 0;
  color: var(--text-muted);
  font-size: 15px;
}

.prep-note {
  margin: 20px 0 0;
  color: var(--text-muted);
  font-size: 15px;
}

.prep-note a {
  margin-right: 16px;
}

/* 合作流程内页 */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 300px);
  gap: 40px;
  align-items: start;
}

.layout-main {
  min-width: 0;
}

.page-layout .section {
  margin-bottom: 40px;
}

.page-layout .section:last-child {
  margin-bottom: 0;
}

.process-overview .step-list {
  border-top: 1px solid var(--border);
}

.process-overview .step-item {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 16px;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  min-width: 0;
}

.process-overview .step-num {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--success);
}

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

.process-overview .step-name {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

.process-overview .step-desc {
  display: block;
  color: var(--text-muted);
  font-size: 15px;
}

.node-details {
  margin-bottom: 40px;
}

.node-card {
  padding: 24px;
  margin-bottom: 20px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.node-card:last-child {
  margin-bottom: 0;
}

.node-name {
  margin: 0 0 16px;
  font-size: 18px;
}

.node-media {
  margin: 0 0 20px;
}

.node-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background-color: var(--surface-alt);
}

.node-media figcaption {
  margin-top: 8px;
}

.node-fields {
  display: grid;
  grid-template-columns: minmax(120px, 160px) minmax(0, 1fr);
  gap: 8px 20px;
  margin: 0;
}

.node-fields .field-label {
  margin: 0;
  padding: 10px 0;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.node-fields .field-value {
  margin: 0;
  padding: 10px 0;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 15px;
}

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

.prep-column {
  min-width: 0;
  padding: 20px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.prep-heading {
  margin: 0 0 12px;
  font-size: 16px;
}

.prep-column .prep-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.prep-column .prep-item {
  padding: 0 0 0 16px;
  background-color: transparent;
  border: 0;
  border-left: 2px solid var(--border);
  border-radius: 0;
  color: var(--text-muted);
  font-size: 15px;
}

.feedback-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feedback-item {
  padding: 14px 18px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: 15px;
}

.layout-aside {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: sticky;
  top: 88px;
}

.aside-block {
  padding: 20px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.aside-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
}

.aside-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.aside-item {
  min-width: 0;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.6;
}

.aside-item a {
  color: var(--accent);
}

/* 售后支持内页 */
.problem-categories {
  margin-bottom: 40px;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.category-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 20px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.category-name {
  margin: 0 0 8px;
  font-size: 16px;
}

.category-desc {
  margin: 0 0 12px;
  color: var(--text-muted);
  font-size: 14px;
}

.category-count {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--success);
}

.category-link {
  margin-top: auto;
  font-size: 14px;
  font-weight: 600;
}

.support-figure {
  margin: 0 0 40px;
}

.support-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background-color: var(--surface-alt);
}

.support-figure figcaption {
  margin-top: 10px;
}

.self-help-steps {
  margin-bottom: 40px;
}

.step-group {
  margin-bottom: 28px;
  padding: 24px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  scroll-margin-top: 88px;
}

.step-group:last-child {
  margin-bottom: 0;
}

.step-group-title {
  margin: 0 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  font-size: 17px;
}

.self-help-steps .step-item {
  display: grid;
  grid-template-columns: minmax(140px, 200px) minmax(0, 1fr);
  gap: 16px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px dashed var(--border);
  min-width: 0;
}

.self-help-steps .step-item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.self-help-steps .step-name {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.self-help-steps .step-desc {
  color: var(--text-muted);
  font-size: 15px;
  min-width: 0;
}

.escalation {
  margin-bottom: 40px;
}

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

.escalation-item {
  min-width: 0;
  padding: 20px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: var(--radius);
}

.escalation-name {
  margin: 0 0 10px;
  font-size: 16px;
}

.escalation-desc {
  margin: 0;
  color: var(--text-muted);
  font-size: 15px;
}

.feedback-path {
  padding: 24px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.feedback-path p {
  max-width: var(--content-max);
  color: var(--text-muted);
  font-size: 15px;
}

.feedback-entry {
  margin-top: 16px;
}

/* 资料说明内页 */
.material-types {
  margin-bottom: 40px;
}

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

.material-card {
  min-width: 0;
  padding: 20px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.material-types .material-name {
  margin: 0 0 10px;
  font-size: 17px;
}

.material-desc {
  margin: 0;
  color: var(--text-muted);
  font-size: 15px;
}

.material-visual {
  margin-bottom: 40px;
}

.material-figure {
  margin: 0;
}

.material-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background-color: var(--surface-alt);
}

.material-caption {
  margin-top: 10px;
}

.material-usage {
  margin-bottom: 40px;
}

.usage-item {
  max-width: var(--content-max);
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
}

.usage-item:last-child {
  border-bottom: 0;
}

.usage-name {
  margin: 0 0 8px;
  font-size: 16px;
}

.usage-text {
  margin: 0;
  color: var(--text-muted);
  font-size: 15px;
}

.material-restrictions {
  margin-bottom: 40px;
}

.restriction-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: var(--content-max);
}

.restriction-item {
  padding: 14px 18px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--border-strong);
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: 15px;
}

.material-access {
  margin-bottom: 40px;
}

.section-text {
  max-width: var(--content-max);
  color: var(--text-muted);
  font-size: 15px;
}

.related-entry {
  padding: 24px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.related-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
}

.related-item {
  font-size: 15px;
}

/* 404 页 */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 48px 0;
}

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

.error-block {
  max-width: var(--content-max);
  margin-bottom: 40px;
}

.error-code {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--success);
}

.error-title {
  margin: 0 0 14px;
  font-size: 32px;
}

.error-text {
  max-width: 520px;
  margin: 0 0 24px;
  color: var(--text-muted);
  font-size: 16px;
}

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

.btn {
  display: inline-block;
  padding: 11px 20px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  border: 1px solid transparent;
}

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

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: #0857b3;
  border-color: #0857b3;
  color: #ffffff;
  text-decoration: none;
}

.btn-ghost {
  background-color: var(--surface);
  border-color: var(--border);
  color: var(--text);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

.error-links .section-title {
  margin-bottom: 16px;
}

.error-link-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
}

.error-link-list a {
  font-size: 15px;
  font-weight: 600;
}

/* ===== pages ===== */

/* 首页区块间距微调 */
.site-home .service-directions {
  padding-top: 56px;
}

.site-home .contact-entry {
  padding-bottom: 64px;
}

/* 服务方向页：字段表与说明的节奏 */
.page-service-directions .direction-notes .notes-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

/* 合作流程页：主栏与侧栏信息层级 */
.page-cooperation-process .layout-aside .aside-block:first-child {
  border-top: 3px solid var(--success);
}

/* 售后支持页：分类卡与步骤组呼应 */
.page-after-sales-support .category-card {
  border-top: 3px solid var(--border-strong);
}

/* 资料说明页：相关入口弱化背景 */
.page-materials-guide .related-entry {
  background-color: var(--surface-alt);
}

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

@media (max-width: 1024px) {
  .hero-title {
    font-size: 34px;
  }

  .page-layout {
    grid-template-columns: minmax(0, 1fr) minmax(220px, 260px);
    gap: 28px;
  }

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

  .layout-aside {
    position: static;
  }
}

@media (max-width: 900px) {
  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
  }

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

  .layout-aside {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .layout-aside .aside-block {
    flex: 1 1 240px;
  }
}

@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
    gap: 12px;
    padding: 12px 16px;
  }

  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .site-nav {
    flex: 1 1 100%;
    justify-content: flex-start;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    width: 100%;
    padding: 8px 0 4px;
    border-top: 1px solid var(--border);
  }

  .nav-list.is-open {
    display: flex;
  }

  .nav-link {
    display: block;
    padding: 12px 8px;
    font-size: 16px;
    min-height: 44px;
  }

  .nav-link.is-current {
    box-shadow: inset 3px 0 0 var(--accent);
    background-color: var(--accent-soft);
  }

  .inner-main {
    padding: 0 16px 48px;
  }

  .section-inner {
    padding: 0 16px;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding: 36px 16px 32px;
  }

  .hero-title {
    font-size: 28px;
  }

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

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

  .direction-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
    padding: 16px 0;
  }

  .cooperation-steps .step-item {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 4px 12px;
  }

  .cooperation-steps .step-desc {
    grid-column: 2 / -1;
  }

  .material-grid,
  .material-types .material-grid,
  .notes-list,
  .prep-list,
  .prep-columns,
  .escalation-list,
  .scene-media-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-header {
    padding: 20px 0 24px;
    margin-bottom: 24px;
  }

  .page-title {
    font-size: 26px;
  }

  .self-help-steps .step-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

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

  .node-fields .field-label {
    padding-bottom: 0;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
  }

  .node-fields .field-value {
    border-top: 0;
    padding-top: 4px;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 32px 16px 24px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 16px 24px;
  }

  .error-main {
    padding: 36px 0;
    min-height: 50vh;
  }

  .main-inner {
    padding: 0 16px;
  }

  .error-title {
    font-size: 26px;
  }
}

@media (max-width: 480px) {
  body.site-body {
    font-size: 15px;
  }

  .hero-title {
    font-size: 24px;
  }

  .page-title,
  .error-title {
    font-size: 22px;
  }

  .section-title {
    font-size: 20px;
  }

  .site-home .service-directions,
  .service-directions,
  .cooperation-steps,
  .materials,
  .scenes,
  .faq,
  .contact-entry {
    padding: 36px 0;
  }

  .entry-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .button-link,
  .btn {
    width: 100%;
    text-align: center;
  }

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

  .layout-aside {
    flex-direction: column;
  }

  .layout-aside .aside-block {
    flex: 1 1 auto;
  }

  .related-list,
  .error-link-list {
    flex-direction: column;
    gap: 10px;
  }
}