/* ==========================================================================
   光棍影院2020 官网 · 全站样式表
   结构：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base · 变量与基础排版
   -------------------------------------------------------------------------- */
:root {
  --color-primary: #2F5D62;
  --color-primary-dark: #234A4E;
  --color-accent: #E07A3F;
  --color-accent-dark: #C4632C;
  --color-bg: #F7F8F8;
  --color-surface: #FFFFFF;
  --color-text: #1F2A2E;
  --color-muted: #6B7A80;
  --color-line: #DCE2E3;
  --color-line-soft: #E8ECEC;
  --shadow-soft: 0 1px 2px rgba(31, 42, 46, 0.06);
  --radius: 6px;
  --radius-sm: 4px;
  --container: 1080px;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC",
    Arial, sans-serif;
  --font-head: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Source Han Sans SC", "Noto Sans CJK SC", -apple-system, BlinkMacSystemFont,
    "Segoe UI", Arial, sans-serif;
}

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

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

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

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-primary);
}

p {
  margin: 0;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease;
}

a:hover,
a:focus-visible {
  color: var(--color-accent-dark);
  text-decoration: underline;
}

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

figure {
  margin: 0;
}

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

button {
  font: inherit;
  color: inherit;
}

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

/* --------------------------------------------------------------------------
   layout · 页头与主导航
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-line);
}

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  min-height: 64px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand-logo {
  flex: 0 0 auto;
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 600;
  color: var(--color-primary);
  white-space: nowrap;
}

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

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

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

.nav-link {
  display: inline-block;
  padding: 9px 12px;
  min-height: 44px;
  line-height: 26px;
  font-size: 15px;
  color: var(--color-text);
  border-bottom: 2px solid transparent;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-primary);
  border-bottom-color: var(--color-line);
  text-decoration: none;
}

.nav-link.is-current {
  color: var(--color-primary);
  font-weight: 600;
  border-bottom-color: var(--color-accent);
}

.header-cta {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 8px 18px;
  background-color: var(--color-accent);
  color: #FFFFFF;
  font-size: 15px;
  border-radius: var(--radius-sm);
}

.header-cta:hover,
.header-cta:focus-visible {
  background-color: var(--color-accent-dark);
  color: #FFFFFF;
  text-decoration: none;
}

.nav-toggle {
  display: none;
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  padding: 0;
  background-color: transparent;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   layout · 主内容骨架与内页两栏
   -------------------------------------------------------------------------- */
.site-main {
  display: block;
}

.home-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px 72px;
}

.inner-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 28px 24px 72px;
}

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 40px;
  align-items: start;
}

.sidebar-left .page-layout {
  grid-template-columns: 280px minmax(0, 1fr);
}

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

.layout-aside,
.page-aside {
  min-width: 0;
}

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

/* --------------------------------------------------------------------------
   layout · 页脚
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: #EDF0F0;
  border-top: 1px solid var(--color-line);
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 44px 24px 28px;
}

.footer-groups {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--color-line);
}

.footer-group-title {
  font-size: 15px;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-links a {
  display: inline-block;
  padding: 3px 0;
  font-size: 14px;
  color: var(--color-muted);
}

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

.footer-brand {
  padding: 22px 0 0;
}

.footer-brand-name {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
}

.footer-brand-desc {
  margin-top: 6px;
  max-width: 640px;
  font-size: 14px;
  color: var(--color-muted);
}

.footer-copyright {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--color-line-soft);
  font-size: 13px;
  color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   components · 通用按钮与链接
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  font-size: 15px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
}

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

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--color-primary-dark);
  color: #FFFFFF;
  text-decoration: none;
}

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

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background-color: var(--color-primary);
  color: #FFFFFF;
  text-decoration: none;
}

.text-link {
  display: inline-block;
  font-size: 15px;
  color: var(--color-accent-dark);
  border-bottom: 1px solid var(--color-accent);
  padding-bottom: 2px;
}

.text-link:hover,
.text-link:focus-visible {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   components · 通用区块标题
   -------------------------------------------------------------------------- */
.section {
  padding: 44px 0 0;
}

.section-head {
  border-top: 1px solid var(--color-line);
  padding-top: 26px;
  margin-bottom: 22px;
}

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

.section-lead,
.section-intro {
  margin-top: 10px;
  max-width: 720px;
  font-size: 15px;
  color: var(--color-muted);
}

.section-foot {
  margin-top: 20px;
}

.section-footnote {
  margin-top: 16px;
  font-size: 14px;
  color: var(--color-muted);
}

.section-footnote a {
  color: var(--color-primary);
}

.section-footnote a + a {
  margin-left: 16px;
}

.section-note {
  margin-top: 18px;
  font-size: 15px;
  color: var(--color-muted);
}

.subsection-title {
  font-size: 18px;
  margin-bottom: 12px;
}

/* --------------------------------------------------------------------------
   components · 面包屑与页面标题区
   -------------------------------------------------------------------------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 18px;
}

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

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

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

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

.page-header {
  padding-bottom: 22px;
  margin-bottom: 30px;
  border-bottom: 1px solid var(--color-line);
}

.page-title {
  font-size: 32px;
  font-weight: 600;
  color: var(--color-primary);
}

.page-description {
  margin-top: 12px;
  max-width: 720px;
  font-size: 16px;
  color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   components · 图片容器
   -------------------------------------------------------------------------- */
.content-media,
.hero-media,
.direction-media,
.process-figure,
.page-media,
.section-figure {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  background-color: var(--color-line-soft);
}

.content-media img,
.hero-media img,
.direction-media img,
.process-figure img,
.page-media img,
.section-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.content-media figcaption,
.hero-media figcaption,
.process-figure figcaption,
.page-media figcaption,
.section-figure figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px 14px;
  font-size: 13px;
  color: #FFFFFF;
  background-color: rgba(31, 42, 46, 0.62);
}

/* --------------------------------------------------------------------------
   pages · 首页
   -------------------------------------------------------------------------- */
.hero {
  padding: 40px 0 0;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  grid-template-areas:
    "text media"
    "quick quick";
  gap: 28px 40px;
  align-items: start;
}

.hero-text {
  grid-area: text;
  min-width: 0;
}

.hero-eyebrow {
  font-size: 14px;
  color: var(--color-accent-dark);
  border-left: 3px solid var(--color-accent);
  padding-left: 10px;
  margin-bottom: 14px;
}

.hero-title {
  font-size: 32px;
  font-weight: 600;
  color: var(--color-primary);
}

.hero-lead {
  margin-top: 14px;
  font-size: 16px;
  color: var(--color-text);
  max-width: 520px;
}

.hero-actions {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-media {
  grid-area: media;
  aspect-ratio: 16 / 11;
  min-height: 220px;
}

.hero-quick {
  grid-area: quick;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background-color: var(--color-line);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.quick-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 18px;
  min-height: 76px;
  background-color: var(--color-surface);
}

.quick-item:hover,
.quick-item:focus-visible {
  background-color: #F1F5F5;
  text-decoration: none;
}

.quick-label {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
}

.quick-desc {
  font-size: 14px;
  color: var(--color-muted);
}

.content-media-primary {
  margin-top: 34px;
  aspect-ratio: 21 / 8;
}

/* 服务方向总览 */
.service-rows {
  border-top: 1px solid var(--color-line);
}

.service-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 20px;
  align-items: center;
  padding: 18px 0;
  border-bottom: 1px solid var(--color-line);
}

.service-row-main {
  min-width: 0;
}

.service-name {
  font-size: 18px;
  color: var(--color-primary);
}

.service-target {
  margin-top: 4px;
  font-size: 14px;
  color: var(--color-accent-dark);
}

.service-desc {
  margin-top: 6px;
  font-size: 15px;
  color: var(--color-text);
  max-width: 700px;
}

.service-row-link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 16px;
  font-size: 14px;
  color: var(--color-primary);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.service-row-link:hover,
.service-row-link:focus-visible {
  border-color: var(--color-primary);
  background-color: #F1F5F5;
  text-decoration: none;
}

/* 合作流程四阶段概览 */
.process-steps {
  border-top: 1px solid var(--color-line);
}

.process-step {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--color-line);
}

.process-step .step-index {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 600;
  color: var(--color-accent);
  line-height: 1.4;
}

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

.process-step .step-name {
  font-size: 18px;
  color: var(--color-primary);
}

.process-step .step-work {
  margin-top: 6px;
  font-size: 15px;
  color: var(--color-text);
  max-width: 720px;
}

.process-step .step-coop {
  margin-top: 6px;
  font-size: 14px;
  color: var(--color-muted);
  max-width: 720px;
}

/* 服务边界摘要 */
.boundary-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.boundary-block {
  padding: 20px 22px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.boundary-in {
  border-left: 3px solid var(--color-primary);
}

.boundary-out {
  border-left: 3px solid var(--color-accent);
}

.boundary-name {
  font-size: 18px;
  margin-bottom: 12px;
}

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

.boundary-list li {
  position: relative;
  padding-left: 16px;
  font-size: 15px;
  color: var(--color-text);
}

.boundary-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  background-color: var(--color-muted);
  border-radius: 50%;
}

.boundary-in .boundary-list li::before {
  background-color: var(--color-primary);
}

.boundary-out .boundary-list li::before {
  background-color: var(--color-accent);
}

/* 常见问题速览 */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background-color: var(--color-line);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.faq-item {
  background-color: var(--color-surface);
  padding: 18px 22px;
}

.faq-question {
  font-size: 17px;
  color: var(--color-primary);
}

.faq-answer {
  margin-top: 8px;
  font-size: 15px;
  color: var(--color-text);
  max-width: 720px;
}

/* 站内页面索引 */
.index-columns {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

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

.index-name {
  font-size: 17px;
}

.index-name a {
  color: var(--color-primary);
}

.index-desc {
  margin-top: 8px;
  font-size: 14px;
  color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   pages · 服务方向
   -------------------------------------------------------------------------- */
.direction-block {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 24px;
  padding: 24px 0;
  border-top: 1px solid var(--color-line);
}

.direction-block:first-of-type {
  border-top: none;
  padding-top: 0;
}

.direction-media {
  aspect-ratio: 4 / 3;
  min-height: 150px;
}

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

.direction-name {
  font-size: 18px;
  color: var(--color-primary);
}

.direction-audience {
  margin-top: 6px;
  font-size: 14px;
  color: var(--color-accent-dark);
}

.direction-desc {
  margin-top: 8px;
  font-size: 15px;
  color: var(--color-text);
}

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

.delivery-table {
  min-width: 520px;
  font-size: 15px;
}

.delivery-caption {
  caption-side: top;
  text-align: left;
  padding: 12px 16px;
  font-size: 14px;
  color: var(--color-muted);
  border-bottom: 1px solid var(--color-line);
}

.delivery-table th,
.delivery-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-line-soft);
  vertical-align: top;
}

.delivery-table thead th {
  background-color: #F1F5F5;
  font-family: var(--font-head);
  font-weight: 600;
  color: var(--color-primary);
}

.delivery-table tbody tr:last-child th,
.delivery-table tbody tr:last-child td {
  border-bottom: none;
}

.delivery-notes {
  margin-top: 24px;
}

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

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

.section-boundary .boundary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.boundary-col {
  padding: 18px 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius);
}

.boundary-heading {
  font-size: 17px;
  margin-bottom: 10px;
}

.boundary-col .boundary-item {
  position: relative;
  padding-left: 16px;
  font-size: 15px;
  color: var(--color-text);
}

.boundary-col .boundary-item + .boundary-item {
  margin-top: 8px;
}

.boundary-col .boundary-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  background-color: var(--color-muted);
  border-radius: 50%;
}

/* --------------------------------------------------------------------------
   pages · 合作流程
   -------------------------------------------------------------------------- */
.process-section {
  margin-bottom: 34px;
}

.process-figure {
  margin-top: 18px;
  aspect-ratio: 21 / 9;
  min-height: 180px;
}

.stage-list {
  margin-bottom: 34px;
}

.stage-item {
  padding: 20px 0;
  border-top: 1px solid var(--color-line);
}

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

.stage-number {
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent-dark);
}

.stage-name {
  margin-top: 4px;
  font-size: 18px;
  color: var(--color-primary);
}

.stage-desc {
  margin-top: 8px;
  font-size: 15px;
  color: var(--color-text);
  max-width: 720px;
}

.stage-output {
  margin-top: 8px;
  font-size: 14px;
  color: var(--color-muted);
  padding-left: 12px;
  border-left: 2px solid var(--color-line);
}

.coop-section {
  margin-bottom: 34px;
}

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

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

.coop-name {
  font-size: 17px;
  color: var(--color-primary);
}

.coop-desc {
  margin-top: 8px;
  font-size: 15px;
  color: var(--color-text);
}

.related-section {
  margin-bottom: 8px;
}

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

.related-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 18px;
  font-size: 15px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
}

.related-links a:hover,
.related-links a:focus-visible {
  border-color: var(--color-primary);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   pages · 常见问题
   -------------------------------------------------------------------------- */
.page-media {
  aspect-ratio: 21 / 8;
  min-height: 160px;
  margin-bottom: 34px;
}

.faq-section {
  margin-bottom: 34px;
}

.faq-section .faq-item {
  padding: 0;
}

.faq-section .faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 22px;
  min-height: 44px;
  font-size: 17px;
  cursor: pointer;
  list-style: none;
}

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

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

.faq-section .faq-item[open] .faq-question::after {
  content: "−";
}

.faq-section .faq-answer {
  padding: 0 22px 18px;
  margin-top: 0;
}

.faq-note {
  padding: 22px 24px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.faq-note .note-list {
  margin-top: 14px;
  gap: 16px;
}

.faq-note .note-item {
  padding-left: 14px;
  border-left: 2px solid var(--color-line);
}

.faq-note .note-title {
  font-size: 16px;
  color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   pages · 对接入口
   -------------------------------------------------------------------------- */
.content-section {
  margin-bottom: 36px;
}

.content-section > h2 {
  font-size: 24px;
}

.content-section > p {
  margin-top: 10px;
  max-width: 720px;
  font-size: 15px;
  color: var(--color-muted);
}

.section-figure {
  margin-top: 20px;
  aspect-ratio: 21 / 9;
  min-height: 170px;
}

.checklist {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  counter-reset: checklist;
}

.checklist-item {
  position: relative;
  padding: 18px 20px 18px 54px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.checklist-item::before {
  counter-increment: checklist;
  content: counter(checklist, decimal-leading-zero);
  position: absolute;
  left: 18px;
  top: 18px;
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent);
}

.checklist-item h3 {
  font-size: 16px;
  color: var(--color-primary);
}

.checklist-item p {
  margin-top: 6px;
  font-size: 15px;
  color: var(--color-text);
}

.path-steps {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background-color: var(--color-line);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.path-step {
  padding: 20px 22px;
  background-color: var(--color-surface);
}

.path-step-index {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent-dark);
}

.path-step h3 {
  margin-top: 6px;
  font-size: 17px;
  color: var(--color-primary);
}

.path-step p {
  margin-top: 8px;
  font-size: 15px;
  color: var(--color-text);
}

.concern-list {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.concern-item {
  padding: 18px 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-top: 3px solid var(--color-primary);
  border-radius: var(--radius);
}

.concern-item h3 {
  font-size: 16px;
  color: var(--color-primary);
}

.concern-item p {
  margin-top: 8px;
  font-size: 15px;
  color: var(--color-text);
}

/* --------------------------------------------------------------------------
   components · 侧栏
   -------------------------------------------------------------------------- */
.aside-block {
  padding: 18px 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.aside-block + .aside-block {
  margin-top: 20px;
}

.aside-title {
  font-size: 16px;
  color: var(--color-primary);
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--color-line);
}

.aside-list,
.aside-toc,
.aside-nav,
.aside-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.aside-list a,
.aside-toc a,
.aside-nav a,
.aside-links a,
.aside-link {
  display: block;
  padding: 7px 0;
  font-size: 14px;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-line-soft);
}

.aside-list li:last-child a,
.aside-toc li:last-child a,
.aside-nav li:last-child a,
.aside-links li:last-child a {
  border-bottom: none;
}

.aside-list a:hover,
.aside-toc a:hover,
.aside-nav a:hover,
.aside-links a:hover,
.aside-link:hover,
.aside-list a:focus-visible,
.aside-toc a:focus-visible,
.aside-nav a:focus-visible,
.aside-links a:focus-visible,
.aside-link:focus-visible {
  color: var(--color-primary);
}

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

.aside-note {
  background-color: #F1F5F5;
}

.aside-note .aside-text {
  color: var(--color-text);
}

/* --------------------------------------------------------------------------
   pages · 404
   -------------------------------------------------------------------------- */
.error-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 56px 24px 72px;
}

.error-panel {
  padding: 34px 32px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius);
}

.error-code {
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent-dark);
}

.error-title {
  margin-top: 8px;
  font-size: 32px;
  color: var(--color-primary);
}

.error-text {
  margin-top: 12px;
  max-width: 640px;
  font-size: 16px;
  color: var(--color-muted);
}

.error-actions {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.error-links {
  margin-top: 40px;
}

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

.error-link-list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 16px;
  font-size: 15px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
}

.error-link-list a:hover,
.error-link-list a:focus-visible {
  border-color: var(--color-primary);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   responsive · 平板与手机
   -------------------------------------------------------------------------- */
@media (max-width: 980px) {
  .page-layout {
    grid-template-columns: minmax(0, 1fr) 240px;
    gap: 30px;
  }

  .sidebar-left .page-layout {
    grid-template-columns: 240px minmax(0, 1fr);
  }

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

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

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

@media (max-width: 768px) {
  .header-inner {
    padding: 0 16px;
    min-height: 58px;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: space-between;
  }

  .nav-toggle {
    display: flex;
    order: 3;
  }

  .header-cta {
    order: 2;
    margin-left: auto;
    min-height: 38px;
    padding: 6px 14px;
    font-size: 14px;
  }

  .site-nav {
    order: 4;
    flex: 1 1 100%;
    justify-content: flex-start;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    padding: 6px 0 12px;
    border-top: 1px solid var(--color-line);
  }

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

  .nav-link {
    padding: 11px 4px;
    border-bottom: 1px solid var(--color-line-soft);
    border-left: 2px solid transparent;
  }

  .nav-link.is-current {
    border-bottom-color: var(--color-line-soft);
    border-left-color: var(--color-accent);
    padding-left: 10px;
  }

  .home-main,
  .inner-main,
  .error-main {
    padding-left: 16px;
    padding-right: 16px;
  }

  .home-main {
    padding-bottom: 56px;
  }

  .inner-main {
    padding-top: 20px;
    padding-bottom: 56px;
  }

  .page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

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

  .layout-aside,
  .page-aside {
    order: 2;
  }

  .hero {
    padding-top: 26px;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      "text"
      "media"
      "quick";
    gap: 22px;
  }

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

  .hero-media {
    aspect-ratio: 16 / 10;
    min-height: 0;
  }

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

  .content-media-primary,
  .process-figure,
  .page-media,
  .section-figure {
    aspect-ratio: 16 / 9;
    min-height: 0;
  }

  .section {
    padding-top: 34px;
  }

  .section-title,
  .content-section > h2 {
    font-size: 21px;
  }

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

  .service-row-link {
    justify-self: start;
  }

  .process-step {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 12px;
  }

  .boundary-columns,
  .section-boundary .boundary-grid,
  .coop-list,
  .checklist,
  .concern-list {
    grid-template-columns: minmax(0, 1fr);
  }

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

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

  .direction-media {
    aspect-ratio: 16 / 9;
    min-height: 0;
  }

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

  .error-panel {
    padding: 26px 22px;
  }

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

  .footer-inner {
    padding: 34px 16px 24px;
  }

  .footer-groups {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
  }
}

@media (max-width: 420px) {
  .hero-actions .btn,
  .error-actions .btn {
    width: 100%;
  }

  .related-links a {
    width: 100%;
    justify-content: center;
  }
}