/* =========================================================
   光棍手机影院 · 全站样式表
   分组：base / layout / components / pages / responsive
   ========================================================= */

/* ---------------------------------------------------------
   base · 变量与基础排版
   --------------------------------------------------------- */
:root {
  --ink: #1c2126;
  --ink-soft: #4a545e;
  --ink-mute: #6d7883;
  --line: #d8dde3;
  --line-soft: #e6eaee;
  --bg: #f5f6f8;
  --surface: #ffffff;
  --theme: #2f5d8a;
  --theme-deep: #24486b;
  --theme-soft: #e8eef5;
  --warn: #8a5a2f;
  --warn-soft: #f4ece3;
  --radius: 6px;
  --shell: 1120px;
  --reading: 720px;
  --font-sans: "Source Han Sans SC", "Noto Sans SC", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", sans-serif;
  --font-mono: "SFMono-Regular", "JetBrains Mono", Consolas,
    "Liberation Mono", Menlo, monospace;
}

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

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

body {
  margin: 0;
  background-color: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

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

p {
  margin: 0;
}

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

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

a:hover,
a:focus-visible {
  color: var(--theme-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

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

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

th,
td {
  text-align: left;
  vertical-align: top;
}

dl,
dd,
dt,
figure,
figcaption {
  margin: 0;
}

button {
  font: inherit;
  color: inherit;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------------------------------------------------------
   layout · 全站骨架：页头 / 导航 / 主容器 / 页脚
   --------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background-color: var(--surface);
  border-bottom: 1px solid var(--line);
}

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

.brand {
  display: inline-block;
  padding: 8px 0;
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

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

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

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

.nav-list > li > a {
  display: block;
  padding: 10px 14px;
  font-size: 15px;
  color: var(--ink-soft);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.nav-list > li > a:hover,
.nav-list > li > a:focus-visible {
  color: var(--theme-deep);
  text-decoration: none;
}

.nav-list > li > a.is-current {
  color: var(--theme);
  font-weight: 600;
  border-bottom-color: var(--theme);
}

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

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  background-color: var(--ink);
}

.site-main {
  display: block;
}

.inner-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 28px 24px 64px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--ink-mute);
  margin-bottom: 18px;
}

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

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

.page-header {
  padding-bottom: 20px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

.page-title {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.35;
}

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

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

.footer-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 40px 24px 28px;
}

.footer-groups {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px 32px;
  padding-bottom: 26px;
  border-bottom: 1px solid var(--line-soft);
}

.footer-group-title {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--ink);
  margin-bottom: 12px;
}

.footer-list li + li {
  margin-top: 8px;
}

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

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

.footer-note {
  margin-top: 22px;
  max-width: 760px;
  font-size: 14px;
  color: var(--ink-soft);
}

.footer-copyright {
  margin-top: 12px;
  font-size: 13px;
  color: var(--ink-mute);
}

/* 内页两栏骨架：主内容在前，aside 在后 */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 40px;
  align-items: start;
}

.page-layout.layout-shell {
  grid-template-columns: minmax(0, 1fr) 300px;
}

.layout-main {
  min-width: 0;
  max-width: var(--reading);
}

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

.sidebar-left .page-layout {
  grid-template-columns: 300px minmax(0, 1fr);
}

.sidebar-left .page-layout .layout-main {
  order: 2;
}

.sidebar-left .page-layout .layout-aside {
  order: 1;
}

/* ---------------------------------------------------------
   components · 通用组件
   --------------------------------------------------------- */

/* 区块标题组 */
.section-head {
  margin-bottom: 22px;
}

.section-title {
  font-size: 22px;
  font-weight: 600;
}

.section-desc,
.section-intro {
  margin-top: 10px;
  max-width: var(--reading);
  font-size: 15px;
  color: var(--ink-soft);
}

.section-note {
  margin-top: 8px;
  font-size: 14px;
  color: var(--ink-mute);
}

.section-text {
  margin-top: 14px;
  max-width: var(--reading);
  font-size: 16px;
  color: var(--ink-soft);
}

.section-more {
  margin-top: 18px;
  font-size: 15px;
}

.text-link {
  font-weight: 600;
}

/* 侧栏区块 */
.aside-block + .aside-block {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--line-soft);
}

.aside-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 12px;
}

.aside-intro {
  margin-bottom: 14px;
  font-size: 14px;
  color: var(--ink-soft);
}

.aside-nav li + li {
  margin-top: 8px;
}

.aside-nav a {
  display: block;
  padding: 6px 0 6px 12px;
  font-size: 14px;
  color: var(--ink-soft);
  border-left: 2px solid var(--line);
}

.aside-nav a:hover,
.aside-nav a:focus-visible {
  color: var(--theme-deep);
  border-left-color: var(--theme);
  text-decoration: none;
}

.aside-links {
  margin-top: 14px;
  font-size: 14px;
}

.aside-link {
  margin-top: 12px;
  font-size: 14px;
}

/* 字段说明小表 */
.field-table {
  font-size: 14px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.field-table th,
.field-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line-soft);
  line-height: 1.6;
}

.field-table thead th {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink);
  background-color: var(--theme-soft);
}

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

.field-table td:first-child {
  color: var(--ink);
  font-weight: 600;
  white-space: nowrap;
}

.field-table td:last-child {
  color: var(--ink-soft);
}

.field-caption,
.field-table-caption {
  caption-side: top;
  padding: 0 0 10px;
  font-size: 13px;
  color: var(--ink-mute);
  text-align: left;
}

/* 图片容器 */
.hero-figure,
.direction-media,
.method-figure,
.media-figure,
.page-media {
  margin: 0;
  overflow: hidden;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

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

.hero-figure figcaption,
.direction-media figcaption,
.method-figure figcaption,
.media-figure figcaption,
.page-media figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--ink-mute);
  border-top: 1px solid var(--line-soft);
}

/* 相关入口 */
.related-links {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.related-title,
.related-section .section-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 14px;
}

.related-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px 24px;
}

.related-list a {
  display: block;
  padding: 12px 14px;
  font-size: 15px;
  font-weight: 600;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

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

.related-desc {
  margin-top: 8px;
  font-size: 14px;
  color: var(--ink-soft);
}

/* ---------------------------------------------------------
   pages · 首页
   --------------------------------------------------------- */
.home-main {
  display: block;
}

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

.hero-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 48px 24px 44px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 460px);
  gap: 40px;
  align-items: center;
}

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

.hero-eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--theme);
  margin-bottom: 12px;
}

.hero-title {
  font-size: 34px;
  font-weight: 700;
  line-height: 1.35;
}

.hero-desc {
  margin-top: 16px;
  max-width: 560px;
  font-size: 16px;
  color: var(--ink-soft);
}

.hero-actions {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-link {
  display: inline-block;
  padding: 11px 20px;
  min-height: 44px;
  font-size: 15px;
  font-weight: 600;
  color: var(--theme-deep);
  background-color: var(--theme-soft);
  border: 1px solid var(--theme-soft);
  border-radius: var(--radius);
}

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

.hero-figure {
  aspect-ratio: 4 / 3;
}

/* 服务方向总览表 */
.overview {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 52px 24px 0;
}

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

.overview-table {
  min-width: 720px;
  font-size: 15px;
}

.overview-table th,
.overview-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line-soft);
  line-height: 1.65;
}

.overview-table thead th {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--ink);
  background-color: var(--theme-soft);
  white-space: nowrap;
}

.overview-table tbody th {
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}

.overview-table tbody td {
  color: var(--ink-soft);
}

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

.overview-table tbody tr:hover {
  background-color: #fafbfc;
}

/* 合作流程四阶段 */
.flow-preview {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 52px 24px 0;
}

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

.flow-item {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 20px;
  padding: 22px 4px;
  border-bottom: 1px solid var(--line);
}

.flow-index {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 600;
  color: var(--theme);
  line-height: 1.5;
}

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

.flow-name {
  font-size: 17px;
  font-weight: 600;
}

.flow-customer,
.flow-output {
  margin-top: 8px;
  font-size: 15px;
  color: var(--ink-soft);
}

.flow-output {
  color: var(--ink-mute);
}

/* 服务边界双栏 */
.boundary {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 52px 24px 0;
}

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

.boundary-col {
  padding: 22px 24px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--theme);
  border-radius: var(--radius);
}

.boundary-col-out {
  border-left-color: var(--warn);
  background-color: var(--warn-soft);
}

.boundary-heading {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 14px;
}

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

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

.boundary-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  background-color: var(--theme);
  border-radius: 1px;
}

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

/* 站内页面索引四列 */
.page-index {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 52px 24px 0;
}

.index-columns {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.index-col {
  min-width: 0;
  padding-top: 16px;
  border-top: 2px solid var(--theme);
}

.index-name {
  font-size: 17px;
  font-weight: 600;
}

.index-desc {
  margin-top: 10px;
  font-size: 14px;
  color: var(--ink-soft);
}

.index-col .text-link {
  display: inline-block;
  margin-top: 12px;
  font-size: 14px;
}

/* 服务方法 */
.method {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 52px 24px 64px;
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.method-item {
  min-width: 0;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.method-figure {
  border: 0;
  border-bottom: 1px solid var(--line-soft);
  border-radius: 0;
  aspect-ratio: 16 / 10;
}

.method-name {
  padding: 16px 18px 0;
  font-size: 17px;
  font-weight: 600;
}

.method-text {
  padding: 10px 18px 20px;
  font-size: 15px;
  color: var(--ink-soft);
}

/* ---------------------------------------------------------
   pages · 服务方向页
   --------------------------------------------------------- */
.service-list .section-title,
.choice-advice .section-title,
.direction-mapping .section-title {
  font-size: 22px;
}

.direction-item {
  margin-top: 28px;
  padding: 24px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.direction-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 16px;
}

.direction-index {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--theme);
  letter-spacing: 0.04em;
}

.direction-name {
  font-size: 19px;
  font-weight: 600;
}

.direction-media {
  aspect-ratio: 16 / 9;
  margin-bottom: 18px;
}

.direction-fields {
  display: grid;
  grid-template-columns: 108px minmax(0, 1fr);
  gap: 10px 18px;
  font-size: 15px;
}

.direction-fields dt {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--theme);
}

.direction-fields dd {
  color: var(--ink-soft);
  min-width: 0;
}

.choice-advice {
  margin-top: 44px;
}

.advice-table {
  margin-top: 18px;
  font-size: 15px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.advice-table th,
.advice-table td {
  padding: 13px 16px;
  border-bottom: 1px solid var(--line-soft);
  line-height: 1.65;
}

.advice-table thead th {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  background-color: var(--theme-soft);
  white-space: nowrap;
}

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

.advice-table td {
  color: var(--ink-soft);
}

.direction-mapping {
  margin-top: 44px;
}

.mapping-list {
  margin-top: 18px;
  border-top: 1px solid var(--line);
}

.mapping-row {
  display: grid;
  grid-template-columns: 150px 150px minmax(0, 1fr);
  gap: 16px;
  padding: 14px 2px;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
}

.mapping-stage {
  font-weight: 600;
  color: var(--ink);
}

.mapping-direction {
  color: var(--theme);
}

.mapping-note {
  color: var(--ink-soft);
}

.mapping-link {
  margin-top: 16px;
  font-size: 15px;
}

/* ---------------------------------------------------------
   pages · 合作流程页
   --------------------------------------------------------- */
.stage-section .section-title,
.stage-media .section-title,
.cooperate-section .section-title,
.related-section .section-title {
  font-size: 22px;
}

.stage-item {
  margin-top: 24px;
  padding: 22px 24px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.stage-number {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--theme);
  margin-bottom: 6px;
}

.stage-name {
  font-size: 19px;
  font-weight: 600;
}

.stage-name-sub {
  margin-top: 6px;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-mute);
}

.stage-fields {
  margin-top: 16px;
  display: grid;
  grid-template-columns: 108px minmax(0, 1fr);
  gap: 10px 18px;
  font-size: 15px;
}

.stage-fields dt {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--theme);
}

.stage-fields dd {
  color: var(--ink-soft);
  min-width: 0;
}

.stage-media {
  margin-top: 44px;
}

.media-figure {
  margin-top: 18px;
  aspect-ratio: 16 / 9;
}

.cooperate-section {
  margin-top: 44px;
}

.cooperate-list {
  margin-top: 18px;
  border-top: 1px solid var(--line);
}

.cooperate-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  padding: 18px 2px;
  border-bottom: 1px solid var(--line);
}

.cooperate-index {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 600;
  color: var(--theme);
}

.cooperate-name {
  font-size: 17px;
  font-weight: 600;
}

.cooperate-desc {
  margin-top: 8px;
  font-size: 15px;
  color: var(--ink-soft);
}

.related-section {
  margin-top: 44px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.related-section .related-list {
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

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

.related-item a {
  padding: 0;
  background-color: transparent;
  border: 0;
}

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

/* ---------------------------------------------------------
   pages · 常见问题页
   --------------------------------------------------------- */
.page-media {
  aspect-ratio: 16 / 9;
  margin-bottom: 32px;
}

.faq-group + .faq-group {
  margin-top: 40px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
}

.faq-group > h2 {
  font-size: 22px;
  font-weight: 600;
}

.faq-item {
  margin-top: 14px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.faq-question {
  position: relative;
  padding: 15px 46px 15px 18px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "";
  position: absolute;
  right: 20px;
  top: 22px;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--ink-mute);
  border-bottom: 2px solid var(--ink-mute);
  transform: rotate(45deg);
  transition: transform 0.18s ease;
}

.faq-item[open] .faq-question {
  color: var(--theme-deep);
}

.faq-item[open] .faq-question::after {
  transform: rotate(-135deg);
}

.faq-answer {
  padding: 0 18px 18px;
  font-size: 15px;
  color: var(--ink-soft);
  border-top: 1px solid var(--line-soft);
  padding-top: 14px;
}

/* ---------------------------------------------------------
   pages · 对接入口页
   --------------------------------------------------------- */
.section-checklist .section-title,
.section-feedback .section-title,
.section-sequence .section-title {
  font-size: 22px;
}

.checklist-group {
  margin-top: 22px;
  padding: 20px 22px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.group-title {
  font-size: 17px;
  font-weight: 600;
}

.group-note {
  margin-top: 8px;
  font-size: 14px;
  color: var(--ink-mute);
}

.checklist-list {
  margin-top: 14px;
}

.checklist-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  color: var(--ink-soft);
}

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

.checklist-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 7px;
  height: 7px;
  border: 1px solid var(--theme);
  border-radius: 1px;
}

.section-feedback {
  margin-top: 44px;
}

.feedback-rows {
  margin-top: 18px;
  border-top: 1px solid var(--line);
}

.feedback-row {
  padding: 18px 2px;
  border-bottom: 1px solid var(--line);
}

.feedback-name {
  font-size: 17px;
  font-weight: 600;
}

.feedback-desc {
  margin-top: 8px;
  font-size: 15px;
  color: var(--ink-soft);
}

.section-sequence {
  margin-top: 44px;
}

.sequence-list {
  margin-top: 18px;
  border-top: 1px solid var(--line);
}

.sequence-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  padding: 18px 2px;
  border-bottom: 1px solid var(--line);
}

.sequence-index {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 600;
  color: var(--theme);
}

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

.sequence-title {
  font-size: 17px;
  font-weight: 600;
}

.sequence-desc {
  margin-top: 8px;
  font-size: 15px;
  color: var(--ink-soft);
}

/* ---------------------------------------------------------
   pages · 404
   --------------------------------------------------------- */
.error-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 72px 24px 88px;
}

.error-block {
  max-width: 640px;
  padding: 32px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--theme);
  border-radius: var(--radius);
}

.error-block h1 {
  font-size: 28px;
  font-weight: 700;
}

.error-lead {
  margin-top: 14px;
  font-size: 16px;
  color: var(--ink-soft);
}

.error-links {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.error-links a {
  display: block;
  padding: 12px 14px;
  min-height: 44px;
  font-size: 15px;
  font-weight: 600;
  background-color: var(--theme-soft);
  border: 1px solid var(--theme-soft);
  border-radius: var(--radius);
}

.error-links a:hover,
.error-links a:focus-visible {
  color: var(--surface);
  background-color: var(--theme);
  border-color: var(--theme);
  text-decoration: none;
}

.error-back {
  margin-top: 24px;
  font-size: 15px;
}

.error-home-link {
  font-weight: 600;
}

/* ---------------------------------------------------------
   responsive · 断点
   --------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 380px);
    gap: 32px;
  }

  .page-layout,
  .page-layout.layout-shell {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 32px;
  }

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

  .index-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px 28px;
  }

  .mapping-row {
    grid-template-columns: 130px 130px minmax(0, 1fr);
  }
}

@media (max-width: 860px) {
  .method-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .sidebar-left .page-layout .layout-main,
  .sidebar-left .page-layout .layout-aside {
    order: initial;
  }

  .layout-main {
    max-width: none;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  .header-inner {
    padding: 0 16px;
    min-height: 58px;
    flex-wrap: wrap;
    gap: 0;
  }

  .brand {
    font-size: 17px;
  }

  .nav-toggle {
    display: flex;
  }

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

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    padding: 6px 0 14px;
  }

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

  .nav-list > li > a {
    padding: 13px 4px 13px 14px;
    font-size: 16px;
    border-bottom: 0;
    border-left: 2px solid transparent;
  }

  .nav-list > li > a.is-current {
    border-bottom-color: transparent;
    border-left-color: var(--theme);
  }

  .inner-main {
    padding: 20px 16px 52px;
  }

  .breadcrumb {
    font-size: 13px;
    margin-bottom: 14px;
  }

  .page-header {
    padding-bottom: 16px;
    margin-bottom: 22px;
  }

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

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

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    padding: 32px 16px 34px;
    gap: 26px;
  }

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

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

  .hero-actions {
    gap: 10px;
  }

  .hero-link {
    flex: 1 1 auto;
    text-align: center;
  }

  .overview,
  .flow-preview,
  .boundary,
  .page-index,
  .method {
    padding-left: 16px;
    padding-right: 16px;
  }

  .overview {
    padding-top: 38px;
  }

  .flow-preview,
  .boundary,
  .page-index {
    padding-top: 38px;
  }

  .method {
    padding-top: 38px;
    padding-bottom: 52px;
  }

  .section-title {
    font-size: 19px;
  }

  .section-desc,
  .section-intro,
  .section-text {
    font-size: 15px;
  }

  .flow-item {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 14px;
    padding: 18px 2px;
  }

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

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

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

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

  .direction-item,
  .stage-item,
  .checklist-group {
    padding: 18px 16px;
  }

  .direction-fields,
  .stage-fields {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px 0;
  }

  .direction-fields dt,
  .stage-fields dt {
    margin-top: 10px;
  }

  .direction-fields dt:first-of-type,
  .stage-fields dt:first-of-type {
    margin-top: 0;
  }

  .mapping-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .mapping-stage {
    font-size: 15px;
  }

  .cooperate-item,
  .sequence-item {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 12px;
  }

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

  .error-main {
    padding: 44px 16px 60px;
  }

  .error-block {
    padding: 24px 18px;
  }

  .error-block h1 {
    font-size: 23px;
  }

  .footer-inner {
    padding: 32px 16px 24px;
  }

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

@media (max-width: 390px) {
  .hero-title {
    font-size: 23px;
  }

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

  .hero-link {
    flex: 1 1 100%;
  }

  .faq-question {
    padding: 14px 42px 14px 14px;
    font-size: 15px;
  }

  .faq-answer {
    padding-left: 14px;
    padding-right: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}