/* ==========================================================================
   飘花影院 · 全站样式表
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base · 变量与基础重置
   -------------------------------------------------------------------------- */
:root {
  --ink: #1f2a33;
  --ink-soft: #3b4a55;
  --muted: #6b7a86;
  --accent: #b4622d;
  --accent-dark: #8f4a1e;
  --bg: #f7f5f2;
  --surface: #ffffff;
  --line: #dcd7d0;
  --line-strong: #c6bfb6;
  --container: 1200px;
  --gutter: 32px;
  --radius: 6px;
  --font-head: "Helvetica Neue", "Arial Narrow", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  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: 1.25;
  color: var(--ink);
}

p {
  margin: 0;
}

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

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

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

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

figure {
  margin: 0;
}

figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

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

button {
  font: inherit;
  color: inherit;
}

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

/* --------------------------------------------------------------------------
   layout · 全站骨架：页头 / 导航 / 主容器 / 面包屑 / 页标题 / 页脚
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(247, 245, 242, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: saturate(140%) blur(6px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 18px var(--gutter);
}

.brand {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}

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

.site-nav {
  display: flex;
  align-items: center;
}

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

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-block;
  padding: 10px 14px;
  font-size: 15px;
  color: var(--ink-soft);
  border-bottom: 2px solid transparent;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.nav-link.is-current {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

.nav-toggle {
  display: none;
  position: relative;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  cursor: pointer;
}

.nav-toggle::before,
.nav-toggle::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  height: 2px;
  background: var(--ink);
}

.nav-toggle::before {
  top: 16px;
  box-shadow: 0 6px 0 var(--ink);
}

.nav-toggle::after {
  bottom: 16px;
}

.site-main {
  display: block;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.inner-main {
  padding-top: 28px;
  padding-bottom: 72px;
}

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

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 6px 0 24px;
  font-size: 13px;
  color: var(--muted);
}

.breadcrumb a {
  color: var(--muted);
  border-bottom: 1px solid transparent;
}

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

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

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

.page-header {
  padding-bottom: 40px;
  margin-bottom: 48px;
  border-bottom: 1px solid var(--line);
}

.page-title {
  font-size: 40px;
  font-weight: 600;
  color: var(--ink);
}

.page-description {
  max-width: 62ch;
  margin-top: 18px;
  font-size: 16px;
  color: var(--muted);
}

.page-description a {
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
}

.section {
  padding: 0 0 72px;
}

.section-inner {
  width: 100%;
}

.section-head {
  max-width: 720px;
  margin-bottom: 40px;
}

.section-title {
  font-size: 26px;
  font-weight: 600;
  color: var(--ink);
}

.section-lead,
.section-intro,
.section-desc {
  max-width: 62ch;
  margin-top: 14px;
  font-size: 15px;
  color: var(--muted);
}

.section-note {
  margin-top: 28px;
  font-size: 14px;
  color: var(--muted);
}

.section-note a {
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
}

.section-more {
  margin-top: 32px;
}

.section-tail {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin-top: 32px;
}

.section-tail a {
  padding-bottom: 2px;
  font-size: 15px;
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
}

.text-link {
  display: inline-block;
  padding-bottom: 2px;
  font-size: 14px;
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
}

.text-link:hover,
.text-link:focus-visible {
  color: var(--accent-dark);
  border-bottom-color: var(--accent-dark);
}

/* 页脚 */
.site-footer {
  background: var(--ink);
  color: #cfd6db;
}

.footer-inner {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 56px var(--gutter) 32px;
}

.footer-groups {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 32px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

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

.footer-title {
  margin-bottom: 16px;
  font-size: 14px;
  font-weight: 600;
  color: #ffffff;
}

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

.footer-list a {
  display: inline-block;
  padding-bottom: 2px;
  font-size: 14px;
  color: #aeb8bf;
  border-bottom: 1px solid transparent;
}

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

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 32px;
  padding-top: 26px;
  font-size: 13px;
  color: #8b979f;
}

.footer-brand-note {
  max-width: 62ch;
}

.footer-copy {
  white-space: nowrap;
}

/* --------------------------------------------------------------------------
   components · 通用按钮 / 媒体容器 / 表格
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 26px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 26px;
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  color: #ffffff;
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 26px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  color: var(--accent);
  border-color: var(--accent);
}

/* 通用媒体容器 */
.media-figure,
.section-media,
.hero-media,
.insight-media,
.feature-media,
.timeline-figure {
  overflow: hidden;
  background: #eceae6;
  border-radius: var(--radius);
}

.media-figure img,
.section-media img,
.hero-media img,
.insight-media img,
.feature-media img,
.timeline-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 数据表格 */
.table-wrap {
  overflow-x: auto;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

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

.table-caption {
  padding: 16px 20px;
  font-size: 14px;
  color: var(--muted);
  text-align: left;
  border-bottom: 1px solid var(--line);
}

.data-table thead th {
  padding: 14px 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  text-align: left;
  background: #f2efeb;
  border-bottom: 1px solid var(--line);
}

.data-table tbody th {
  padding: 16px 20px;
  font-weight: 600;
  color: var(--ink);
  text-align: left;
  white-space: nowrap;
  border-bottom: 1px solid var(--line);
}

.data-table tbody td {
  padding: 16px 20px;
  color: var(--ink-soft);
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

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

/* --------------------------------------------------------------------------
   pages · 首页
   -------------------------------------------------------------------------- */
.hero {
  padding: 56px 0 72px;
  margin-bottom: 72px;
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: 56px;
  align-items: center;
}

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

.hero-eyebrow {
  margin-bottom: 18px;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.hero-title {
  font-size: 44px;
  font-weight: 600;
  color: var(--ink);
}

.hero-lead {
  max-width: 46ch;
  margin-top: 20px;
  font-size: 16px;
  color: var(--ink-soft);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

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

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

.service-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px 40px;
  align-items: center;
  padding: 26px 20px;
  border-bottom: 1px solid var(--line);
  transition: background-color 0.18s ease;
}

.service-row:hover {
  background: #f1eee9;
}

.service-row-main {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 7fr);
  gap: 8px 32px;
  align-items: baseline;
  min-width: 0;
}

.service-name {
  grid-column: 1;
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
}

.service-audience {
  grid-column: 1;
  font-size: 13px;
  color: var(--muted);
}

.service-summary {
  grid-column: 2;
  grid-row: 1 / span 2;
  font-size: 15px;
  color: var(--ink-soft);
}

.service-row-link {
  font-size: 14px;
  color: var(--accent);
  white-space: nowrap;
  border-bottom: 1px solid var(--accent);
  padding-bottom: 2px;
}

/* 交付阶段概览（首页时间线） */
.timeline {
  border-top: 1px solid var(--line);
}

.timeline-item {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 24px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.timeline-index {
  font-family: var(--font-head);
  font-size: 26px;
  font-weight: 600;
  line-height: 1.2;
  color: var(--line-strong);
}

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

.timeline-name,
.timeline-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
}

.timeline-collab,
.timeline-text {
  margin-top: 10px;
  font-size: 15px;
  color: var(--ink-soft);
}

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

/* 行业适用场景 */
.scenario-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.scenario-col {
  min-width: 0;
  padding: 26px 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.scenario-name {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
}

.scenario-need {
  margin-top: 14px;
  font-size: 15px;
  color: var(--ink-soft);
}

.scenario-map {
  margin-top: 14px;
  padding-top: 14px;
  font-size: 14px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

/* 业务洞察摘要 */
.insight-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

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

.insight-media {
  aspect-ratio: 16 / 10;
  margin-bottom: 18px;
}

.insight-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
}

.insight-point {
  margin-top: 10px;
  font-size: 15px;
  color: var(--ink-soft);
}

.insight-card .text-link {
  align-self: flex-start;
  margin-top: 18px;
}

/* 合作对接入口 */
.contact-block {
  padding: 32px 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.requirement-list {
  display: grid;
  gap: 14px;
  counter-reset: req;
}

.requirement-item {
  position: relative;
  padding-left: 40px;
  font-size: 15px;
  color: var(--ink-soft);
}

.requirement-item::before {
  counter-increment: req;
  content: counter(req, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
}

.contact-note {
  margin-top: 22px;
  padding-top: 22px;
  font-size: 14px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.contact-block .btn-primary {
  margin-top: 24px;
}

/* 相关内容条 */
.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
  padding: 24px 0 0;
  border-top: 1px solid var(--line);
}

.related-links-label {
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.related-links-item {
  padding-bottom: 2px;
  font-size: 14px;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line-strong);
}

.related-links-item:hover,
.related-links-item:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* --------------------------------------------------------------------------
   pages · 服务方向
   -------------------------------------------------------------------------- */
.section-services-detail .section-title,
.section-fit .section-title,
.section-exclusions .section-title {
  margin-bottom: 0;
}

.section-media {
  margin: 32px 0 40px;
  aspect-ratio: 21 / 9;
}

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

.service-item {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
  gap: 24px 40px;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}

.service-item-head {
  min-width: 0;
}

.service-item-body {
  min-width: 0;
}

.service-item-head .service-name {
  font-size: 20px;
}

.service-item-head .service-audience {
  margin-top: 10px;
  font-size: 13px;
  color: var(--muted);
}

.service-item-body .service-work {
  font-size: 15px;
  color: var(--ink-soft);
}

.service-item-body .service-exclude {
  margin-top: 12px;
  padding-top: 12px;
  font-size: 14px;
  color: var(--muted);
  border-top: 1px dashed var(--line-strong);
}

.service-link {
  display: inline-block;
  margin-top: 16px;
  padding-bottom: 2px;
  font-size: 14px;
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
}

/* 适用对象与前置条件 */
.fit-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 32px;
}

.fit-column {
  min-width: 0;
  padding: 26px 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.fit-heading {
  margin-bottom: 16px;
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
}

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

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

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

/* 不包含事项 */
.exclusion-list {
  margin-top: 32px;
  border-top: 1px solid var(--line);
  counter-reset: exc;
}

.exclusion-item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.exclusion-item::before {
  counter-increment: exc;
  content: counter(exc, decimal-leading-zero);
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--line-strong);
}

.exclusion-item > * {
  grid-column: 2;
}

.exclusion-item::before {
  grid-column: 1;
  grid-row: 1 / span 2;
}

.exclusion-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
}

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

/* --------------------------------------------------------------------------
   pages · 交付体系
   -------------------------------------------------------------------------- */
.timeline-list {
  border-top: 1px solid var(--line);
}

.timeline-list .timeline-item {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 7fr);
  gap: 24px 40px;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}

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

.timeline-list .timeline-body {
  min-width: 0;
}

.timeline-list .timeline-index {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.timeline-meta {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 6px 20px;
  margin: 18px 0 0;
  padding-top: 16px;
  font-size: 14px;
  border-top: 1px solid var(--line);
}

.timeline-meta dt {
  color: var(--muted);
}

.timeline-meta dd {
  margin: 0;
  color: var(--ink-soft);
}

.section-acceptance .table-wrap {
  margin-top: 32px;
}

.change-risk-block {
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.change-risk-block:first-of-type {
  border-top: 1px solid var(--line);
}

.subsection-title {
  margin-bottom: 14px;
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
}

.change-risk-block p {
  max-width: 68ch;
  font-size: 15px;
  color: var(--ink-soft);
}

.change-risk-block p + p {
  margin-top: 12px;
}

.risk-list {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

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

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

/* 相关阅读 */
.related-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 32px;
  margin-top: 32px;
}

.related-item {
  min-width: 0;
  padding: 22px 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.related-link {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
}

.related-link:hover,
.related-link:focus-visible {
  color: var(--accent);
}

.related-desc {
  margin-top: 10px;
  font-size: 14px;
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   pages · 业务洞察（主栏 + 辅助栏）
   -------------------------------------------------------------------------- */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 8fr) minmax(280px, 4fr);
  gap: 56px;
  align-items: start;
}

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

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

.insights-list .section-intro,
.insights-feature .section-intro {
  margin-bottom: 32px;
}

.insights-group + .insights-group {
  margin-top: 36px;
}

.group-title {
  padding-bottom: 12px;
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
}

.article-rows {
  border-bottom: 1px solid var(--line);
}

.article-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.article-row:last-child {
  border-bottom: 0;
}

.article-link {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
}

.article-link:hover,
.article-link:focus-visible {
  color: var(--accent);
}

.article-excerpt {
  font-size: 14px;
  color: var(--muted);
}

.insights-feature {
  margin-top: 56px;
}

.feature-article {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 6fr);
  gap: 24px 32px;
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.feature-article:last-of-type {
  border-bottom: 1px solid var(--line);
}

.feature-media {
  aspect-ratio: 4 / 3;
}

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

.feature-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
}

.feature-point {
  margin-top: 12px;
  font-size: 15px;
  color: var(--accent-dark);
}

.feature-desc {
  margin-top: 12px;
  font-size: 15px;
  color: var(--ink-soft);
}

.feature-more {
  display: inline-block;
  margin-top: 16px;
  padding-bottom: 2px;
  font-size: 14px;
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
}

/* 辅助栏 */
.aside-title {
  margin-bottom: 20px;
  padding-bottom: 12px;
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
}

.aside-block + .aside-block {
  margin-top: 32px;
}

.aside-subtitle {
  margin-bottom: 12px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

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

.aside-list a {
  display: inline-block;
  padding-bottom: 2px;
  font-size: 14px;
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
}

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

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

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

/* --------------------------------------------------------------------------
   pages · 常见问题
   -------------------------------------------------------------------------- */
.faq-visual {
  margin-bottom: 56px;
}

.faq-visual .media-figure {
  aspect-ratio: 21 / 9;
}

.faq-section {
  padding-bottom: 56px;
}

.faq-section .section-lead {
  margin-bottom: 28px;
}

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

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

.faq-question {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 4px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-body);
  font-size: 22px;
  line-height: 1;
  color: var(--accent);
  transition: transform 0.2s ease;
}

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

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

.faq-answer {
  padding: 0 4px 22px;
}

.faq-answer p {
  max-width: 68ch;
  font-size: 15px;
  color: var(--ink-soft);
}

.faq-answer p + p {
  margin-top: 12px;
}

.faq-next {
  padding: 40px 0 0;
  border-top: 1px solid var(--line);
}

.faq-next .section-lead {
  margin-bottom: 24px;
}

.faq-next-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 32px;
}

.faq-next-item a {
  display: inline-block;
  padding-bottom: 2px;
  font-size: 15px;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line-strong);
}

.faq-next-item a:hover,
.faq-next-item a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* --------------------------------------------------------------------------
   pages · 合作对接
   -------------------------------------------------------------------------- */
.requirement-body {
  display: grid;
  grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  gap: 40px;
  align-items: start;
  margin-top: 32px;
}

.section-requirement .requirement-list {
  gap: 20px;
}

.requirement-name {
  margin-bottom: 6px;
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
}

.requirement-text {
  font-size: 15px;
  color: var(--ink-soft);
}

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

.preparation-body {
  display: grid;
  grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
  gap: 40px;
  align-items: start;
  margin-top: 32px;
}

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

.prep-table thead th {
  padding: 14px 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  text-align: left;
  background: #f2efeb;
  border-bottom: 1px solid var(--line);
}

.prep-table tbody th {
  padding: 16px 18px;
  font-weight: 600;
  color: var(--ink);
  text-align: left;
  white-space: nowrap;
  border-bottom: 1px solid var(--line);
}

.prep-table tbody td {
  padding: 16px 18px;
  color: var(--ink-soft);
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

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

.prep-caption {
  padding: 14px 18px;
  font-size: 14px;
  color: var(--muted);
  text-align: left;
  border-bottom: 1px solid var(--line);
}

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

.prep-note-title {
  margin-bottom: 10px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

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

.path-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin-top: 32px;
}

.path-card {
  min-width: 0;
  padding: 26px 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.path-card-title {
  font-size: 18px;
  font-weight: 600;
}

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

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

.path-card-text {
  margin-top: 12px;
  font-size: 15px;
  color: var(--ink-soft);
}

.path-return {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin-top: 32px;
}

.path-return a {
  padding-bottom: 2px;
  font-size: 15px;
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
}

/* --------------------------------------------------------------------------
   pages · 404
   -------------------------------------------------------------------------- */
.error-main {
  padding-top: 72px;
  padding-bottom: 96px;
}

.error-panel {
  max-width: 720px;
  padding: 48px 40px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.error-code {
  margin-bottom: 16px;
  font-family: var(--font-head);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.error-panel h1 {
  font-size: 34px;
  font-weight: 600;
  color: var(--ink);
}

.error-text {
  max-width: 60ch;
  margin-top: 16px;
  font-size: 16px;
  color: var(--ink-soft);
}

.error-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 28px;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.error-links a {
  padding-bottom: 2px;
  font-size: 15px;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line-strong);
}

.error-links a:hover,
.error-links a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.error-actions {
  margin-top: 32px;
}

/* --------------------------------------------------------------------------
   responsive · 1024 / 768 / 480
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  :root {
    --gutter: 24px;
  }

  .hero {
    padding: 40px 0 56px;
    margin-bottom: 56px;
  }

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

  .hero-title {
    font-size: 36px;
  }

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

  .page-title {
    font-size: 34px;
  }

  .service-row-main {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .service-summary {
    grid-column: 1;
    grid-row: auto;
  }

  .scenario-columns,
  .insight-cards,
  .path-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 48px;
  }

  .requirement-body,
  .preparation-body {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  .prep-table {
    min-width: 480px;
  }

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

@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
    padding: 14px var(--gutter);
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    flex-basis: 100%;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    margin-top: 10px;
    padding: 8px 0 12px;
    border-top: 1px solid var(--line);
  }

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

  .nav-link {
    display: block;
    padding: 14px 4px;
    font-size: 16px;
    border-bottom: 1px solid var(--line);
  }

  .nav-link.is-current {
    color: var(--accent);
    border-bottom-color: var(--line);
  }

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

  .breadcrumb {
    padding-bottom: 18px;
  }

  .page-header {
    padding-bottom: 28px;
    margin-bottom: 36px;
  }

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

  .section {
    padding-bottom: 52px;
  }

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

  .hero {
    padding: 32px 0 44px;
    margin-bottom: 44px;
  }

  .hero-title {
    font-size: 30px;
  }

  .hero-actions .btn,
  .hero-actions .btn-primary,
  .hero-actions .btn-ghost {
    flex: 1 1 auto;
  }

  .service-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
    padding: 22px 4px;
  }

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

  .timeline-item,
  .timeline-list .timeline-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
    padding: 22px 0;
  }

  .timeline-index {
    font-size: 20px;
  }

  .timeline-list .timeline-figure {
    aspect-ratio: 16 / 9;
  }

  .scenario-columns,
  .insight-cards,
  .path-grid,
  .fit-columns,
  .related-list,
  .faq-next-list,
  .error-links {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .exclusion-item {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 16px;
  }

  .feature-article {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .timeline-meta {
    grid-template-columns: 84px minmax(0, 1fr);
  }

  .contact-block {
    padding: 24px 20px;
  }

  .error-panel {
    padding: 32px 22px;
  }

  .error-panel h1 {
    font-size: 26px;
  }

  .footer-inner {
    padding: 44px var(--gutter) 28px;
  }

  .footer-bottom {
    flex-direction: column;
  }

  .footer-copy {
    white-space: normal;
  }
}

@media (max-width: 480px) {
  :root {
    --gutter: 18px;
  }

  body {
    font-size: 15px;
  }

  .brand {
    font-size: 18px;
  }

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

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

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

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

  .service-name,
  .timeline-name,
  .timeline-title,
  .scenario-name,
  .subsection-title,
  .feature-title {
    font-size: 18px;
  }

  .faq-question {
    font-size: 16px;
  }

  .requirement-item {
    padding-left: 34px;
  }

  .prep-table {
    min-width: 420px;
  }

  .data-table {
    min-width: 560px;
  }
}