:root {
  --bg: #F7F5F2;
  --surface: #FFFFFF;
  --ink: #1F1F1D;
  --ink-soft: #6B6862;
  --line: #E3DFD8;
  --accent: #C2410C;
  --accent-hover: #9A3412;
  --accent-soft: #FDF0E9;
  --radius: 6px;
  --shell: 1120px;
  --prose: 720px;
  --header-h: 68px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 20px);
}

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

h1 {
  font-size: 40px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 18px;
}

h4 {
  font-size: 16px;
}

p {
  margin: 0 0 1em;
}

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

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

dl,
dd {
  margin: 0;
}

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

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

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

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

strong {
  font-weight: 600;
}

figure {
  margin: 0;
}

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

button {
  font: inherit;
  color: inherit;
}

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

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

.site-main {
  flex: 1 1 auto;
  width: 100%;
}

.section,
.content-section,
.faq-group,
.entry-section {
  padding: 64px 0;
  border-top: 1px solid var(--line);
}

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

.inner-main {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px 72px;
}

.inner-main > .section,
.inner-main > .content-section,
.inner-main > .faq-group,
.inner-main > .entry-section {
  padding-left: 0;
  padding-right: 0;
}

.section-header {
  max-width: var(--prose);
  margin-bottom: 32px;
}

.section-title {
  font-size: 24px;
  margin-bottom: 10px;
}

.section-lead {
  margin: 0;
  color: var(--ink-soft);
  font-size: 16px;
  max-width: var(--prose);
}

.section-foot {
  margin: 28px 0 0;
  font-size: 15px;
}

.section-next {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.section-next-title {
  font-size: 18px;
  margin-bottom: 14px;
}

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

.section-next-list a {
  display: inline-block;
  padding: 6px 0;
  font-size: 15px;
}

.section-media {
  margin: 0 0 32px;
  max-width: var(--prose);
}

.section-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius);
  background: var(--surface);
}

.section-media-caption,
.media-caption {
  margin-top: 10px;
}

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

/* --- 顶部事实条 --- */
.fact-bar {
  background: var(--ink);
  color: #F2EFEA;
  font-size: 14px;
  line-height: 1.6;
}

.fact-bar p,
.fact-bar-text {
  margin: 0 auto;
  width: 100%;
  max-width: var(--shell);
  padding: 9px 24px;
}

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

.fact-bar-inner .fact-bar-text {
  padding-left: 0;
  padding-right: 0;
}

.top-fact {
  margin: 0;
  background: var(--ink);
  color: #F2EFEA;
  font-size: 14px;
  line-height: 1.6;
  padding: 9px 24px;
  text-align: center;
}

/* --- 页头与导航 --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
  transition: background-color 0.2s ease, box-shadow 0.2s ease;
}

.site-header.is-scrolled {
  background: var(--surface);
  box-shadow: 0 1px 0 rgba(31, 31, 29, 0.06);
}

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

.brand {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.2;
  padding: 10px 0;
  flex: 0 0 auto;
}

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

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

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 15px;
}

.nav-toggle-icon {
  display: block;
  width: 16px;
  height: 2px;
  background: var(--ink);
  position: relative;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: var(--ink);
}

.nav-toggle-icon::before {
  top: -5px;
}

.nav-toggle-icon::after {
  top: 5px;
}

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

.nav-link {
  display: inline-block;
  padding: 10px 14px;
  font-size: 15px;
  color: var(--ink);
  border-radius: var(--radius);
  line-height: 1.2;
  white-space: nowrap;
}

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

.nav-link.is-current {
  color: var(--accent);
  font-weight: 600;
  background: var(--accent-soft);
}

/* --- 面包屑 --- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--ink-soft);
  padding: 22px 0 0;
}

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

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

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

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

/* --- 页面标题区 --- */
.page-header {
  padding: 20px 0 32px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 0;
}

.page-title {
  font-size: 40px;
  margin-bottom: 12px;
  max-width: 900px;
}

.page-description {
  margin: 0;
  max-width: var(--prose);
  color: var(--ink-soft);
  font-size: 17px;
  line-height: 1.7;
}

/* --- 按钮 --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 11px 22px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.2;
  transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

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

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

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

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

/* --- 单列方向列表 --- */
.direction-list {
  display: block;
  border-top: 1px solid var(--line);
}

.direction-item {
  position: relative;
  border-bottom: 1px solid var(--line);
  padding: 22px 0 22px 18px;
}

.direction-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  bottom: 22px;
  width: 3px;
  background: transparent;
  transition: background-color 0.18s ease;
}

.direction-item:hover::before {
  background: var(--accent);
}

.direction-index {
  margin: 0 0 4px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}

.direction-name {
  font-size: 18px;
  margin-bottom: 6px;
}

.direction-name a {
  color: var(--ink);
}

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

.direction-for {
  margin: 0 0 6px;
  font-size: 15px;
  color: var(--ink-soft);
}

.direction-work {
  margin: 0;
  font-size: 15px;
  max-width: var(--prose);
}

.direction-item-featured {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
  padding: 28px 0 28px 18px;
}

.direction-item-featured::before {
  top: 28px;
  bottom: 28px;
}

.direction-media {
  margin: 0;
}

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

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

/* --- 方向字段定义列表 --- */
.direction-fields {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 10px 20px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.direction-fields dt {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-soft);
}

.direction-fields dd {
  font-size: 15px;
  min-width: 0;
}

/* --- 四阶段流程条 --- */
.stage-list,
.stage-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.stage-item,
.stage-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 20px;
  min-width: 0;
}

.stage-index {
  margin: 0 0 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}

.stage-name {
  font-size: 18px;
  margin-bottom: 8px;
}

.stage-desc,
.stage-goal {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}

/* --- 左右两栏对照 --- */
.delivery-columns,
.two-col-compare {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
}

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

.delivery-col-title,
.compare-title {
  font-size: 18px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.delivery-points li,
.compare-list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 12px;
  font-size: 15px;
  line-height: 1.7;
}

.delivery-points li:last-child,
.compare-list li:last-child {
  margin-bottom: 0;
}

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

/* --- 折叠问答 --- */
.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 0;
  cursor: pointer;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  list-style: none;
}

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

.faq-question::after {
  content: "展开";
  flex: 0 0 auto;
  font-size: 14px;
  font-weight: 400;
  color: var(--accent);
  padding-top: 2px;
}

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

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

.faq-answer {
  padding: 0 0 22px;
  max-width: var(--prose);
  color: var(--ink-soft);
  font-size: 15px;
}

.faq-answer p {
  margin: 0 0 0.8em;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

/* --- 五列站内栏目索引 --- */
.index-columns {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 20px;
}

.index-col {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 18px;
  min-width: 0;
}

.index-col-title {
  font-size: 17px;
  margin-bottom: 10px;
}

.index-col-title a {
  color: var(--ink);
}

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

.index-col-desc {
  margin: 0;
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.65;
}

/* --- 页脚 --- */
.site-footer {
  background: var(--ink);
  color: #DAD5CE;
  font-size: 14px;
  margin-top: auto;
}

.footer-inner {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 52px 24px 30px;
}

.footer-groups {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 28px;
}

.footer-group-title {
  font-size: 15px;
  color: #FFFFFF;
  margin-bottom: 14px;
  font-weight: 600;
}

.footer-list li {
  margin-bottom: 9px;
}

.footer-list a {
  color: #C9C3BB;
  font-size: 14px;
}

.footer-list a:hover,
.footer-list a:focus-visible {
  color: #FFFFFF;
}

.footer-bottom {
  margin-top: 40px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.footer-brand {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
  color: #FFFFFF;
}

.footer-desc {
  margin: 0 0 6px;
  color: #C9C3BB;
  max-width: var(--prose);
}

.footer-copy {
  margin: 0;
  color: #A8A29A;
  font-size: 13px;
}

/* --- 术语说明与相关入口 --- */
.term-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
  max-width: var(--prose);
}

.term-list dt,
.term-name {
  font-weight: 600;
  font-size: 16px;
  padding-top: 18px;
}

.term-list dd,
.term-desc {
  font-size: 15px;
  color: var(--ink-soft);
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.term-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.term-item .term-name {
  padding-top: 0;
  margin-bottom: 6px;
}

.term-item .term-desc {
  padding-bottom: 0;
  border-bottom: 0;
}

.related-links {
  margin-top: 32px;
}

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

.related-list a,
.related-link {
  display: inline-block;
  padding: 8px 0;
  font-size: 15px;
}

.related-link {
  margin-right: 24px;
}

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

/* --- 首页 --- */
.home-main {
  width: 100%;
}

.hero {
  padding: 56px 0 64px;
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 48px;
  align-items: start;
}

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

.hero-title {
  font-size: 40px;
  margin-bottom: 18px;
  max-width: 560px;
}

.hero-lead {
  font-size: 17px;
  line-height: 1.7;
  margin: 0 0 12px;
  max-width: 560px;
}

.hero-note {
  font-size: 15px;
  color: var(--ink-soft);
  margin: 0 0 26px;
  max-width: 560px;
}

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

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

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

.hero-media figcaption {
  margin-top: 12px;
}

.section-preview .direction-list-mixed {
  border-top: 1px solid var(--line);
}

.section-preview .direction-item-compact {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 4px 20px;
  align-items: baseline;
}

.section-preview .direction-item-compact .direction-index {
  margin: 0;
}

.section-preview .direction-item-compact .direction-name {
  margin: 0;
}

.section-preview .direction-item-compact .direction-for {
  grid-column: 2;
  margin: 0;
}

.link-more {
  display: inline-block;
  padding: 6px 0;
  font-size: 15px;
  font-weight: 600;
}

.section-index .section-inner {
  padding-bottom: 0;
}

/* --- 服务方向页 --- */
.page-service-directions .scope-body {
  max-width: var(--prose);
}

.page-service-directions .scope-body p {
  margin: 0 0 1em;
}

.page-service-directions .scope-body strong {
  display: inline;
}

.page-service-directions .section-directions .direction-item {
  padding: 26px 0 26px 18px;
}

.page-service-directions .section-directions .direction-item-featured {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.page-service-directions .section-directions .direction-item:not(.direction-item-featured) .direction-fields {
  max-width: var(--prose);
}

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

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

.misconception-name {
  font-size: 18px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.misconception-fields {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 10px 16px;
}

.misconception-fields dt {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-soft);
}

.misconception-fields dd {
  font-size: 15px;
  min-width: 0;
}

/* --- 合作流程页 --- */
.page-process .stage-strip {
  margin-bottom: 8px;
}

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

.stage-block {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 26px;
  min-width: 0;
}

.stage-block-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding-bottom: 16px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.stage-block-head .stage-index {
  margin: 0;
}

.stage-title {
  font-size: 20px;
  margin: 0;
}

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

.stage-column {
  min-width: 0;
}

.stage-column-title {
  font-size: 15px;
  color: var(--ink-soft);
  margin-bottom: 12px;
  font-weight: 600;
}

.stage-list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 10px;
  font-size: 15px;
  line-height: 1.7;
}

.stage-list li:last-child {
  margin-bottom: 0;
}

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

.stage-confirm {
  margin-top: 22px;
  padding: 16px 18px;
  background: var(--accent-soft);
  border-radius: var(--radius);
}

.stage-confirm-title {
  font-size: 15px;
  margin-bottom: 8px;
}

.stage-confirm-text {
  margin: 0;
  font-size: 15px;
  color: var(--ink);
}

.dependency-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
}

.dependency-row {
  display: grid;
  grid-template-columns: 1fr 1fr minmax(0, 1.4fr);
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}

.dependency-cell {
  min-width: 0;
}

.dependency-label {
  margin: 0 0 4px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
}

.dependency-value {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
}

.dependency-note {
  min-width: 0;
}

.dependency-note-text {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}

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

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

.stall-summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 0;
  cursor: pointer;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  list-style: none;
}

.stall-summary::-webkit-details-marker {
  display: none;
}

.stall-summary::after {
  content: "展开";
  flex: 0 0 auto;
  font-size: 14px;
  font-weight: 400;
  color: var(--accent);
  padding-top: 2px;
}

.stall-item[open] > .stall-summary::after {
  content: "收起";
}

.stall-summary:hover {
  color: var(--accent-hover);
}

.stall-body {
  padding: 0 0 22px;
  max-width: var(--prose);
}

.stall-line {
  margin: 0 0 10px;
  font-size: 15px;
  color: var(--ink-soft);
}

.stall-line:last-child {
  margin-bottom: 0;
}

.stall-label {
  display: inline-block;
  min-width: 72px;
  font-weight: 600;
  color: var(--ink);
}

/* --- 交付范围页 --- */
.page-delivery .delivery-list .section-media {
  margin-top: 32px;
}

.delivery-group {
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

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

.group-title {
  font-size: 18px;
  margin-bottom: 14px;
}

.delivery-items {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.delivery-item {
  display: grid;
  grid-template-columns: minmax(160px, 1.1fr) minmax(0, 1fr) minmax(0, 1.2fr);
  gap: 16px;
  padding: 12px 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 15px;
  align-items: baseline;
}

.item-name {
  font-weight: 600;
  min-width: 0;
}

.item-form,
.item-confirm {
  color: var(--ink-soft);
  min-width: 0;
}

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

.boundary-item {
  display: grid;
  grid-template-columns: minmax(180px, 0.8fr) minmax(0, 2fr);
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}

.boundary-name {
  font-size: 16px;
  font-weight: 600;
  min-width: 0;
}

.boundary-reason {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
  min-width: 0;
}

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

.change-step {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 20px;
  min-width: 0;
}

.step-title {
  font-size: 17px;
  margin-bottom: 10px;
}

.step-text {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}

/* --- 问题解答页 --- */
.page-faq .faq-group {
  padding: 56px 0;
}

.page-faq .faq-group .section-media {
  margin-bottom: 28px;
}

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

.page-faq .boundary-name {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

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

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

.entry-link {
  display: block;
  height: 100%;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 18px;
  color: var(--ink);
  transition: border-color 0.18s ease;
}

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

.entry-name {
  display: block;
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.entry-desc {
  display: block;
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.65;
}

/* --- 404 页 --- */
.site-error .error-main {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px 72px;
}

.error-hero {
  padding: 72px 0 48px;
  border-bottom: 1px solid var(--line);
}

.error-code {
  margin: 0 0 10px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
}

.error-hero h1 {
  font-size: 40px;
  margin-bottom: 14px;
  max-width: 640px;
}

.error-lead {
  margin: 0 0 28px;
  max-width: var(--prose);
  font-size: 17px;
  color: var(--ink-soft);
}

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

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

.section-note {
  margin: 0 0 24px;
  max-width: var(--prose);
  color: var(--ink-soft);
  font-size: 16px;
}

.error-link-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px 20px;
}

.error-link-list a {
  display: flex;
  align-items: center;
  min-height: 52px;
  padding: 14px 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  font-size: 16px;
}

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

/* --- 跳转链接 --- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--accent);
  color: #FFFFFF;
  padding: 10px 16px;
  border-radius: 0 0 var(--radius) 0;
}

.skip-link:focus {
  left: 0;
  color: #FFFFFF;
}

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

@media (max-width: 900px) {

  h1 {
    font-size: 28px;
  }

  h2 {
    font-size: 21px;
  }

  .section,
  .content-section,
  .faq-group,
  .entry-section {
    padding: 44px 0;
  }

  .page-title,
  .hero-title,
  .error-hero h1 {
    font-size: 28px;
  }

  .page-description,
  .hero-lead,
  .error-lead {
    font-size: 16px;
  }

  /* 导航 */
  .header-inner {
    flex-wrap: wrap;
    align-items: center;
    padding: 10px 20px;
    gap: 12px;
  }

  .site-nav {
    flex-basis: 100%;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
  }

  .nav-toggle {
    display: inline-flex;
    align-self: flex-end;
    order: -1;
  }

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

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

  .nav-list li {
    width: 100%;
    border-bottom: 1px solid var(--line);
  }

  .nav-link {
    display: block;
    width: 100%;
    padding: 14px 4px;
    border-radius: 0;
    border-left: 3px solid transparent;
    font-size: 16px;
  }

  .nav-link.is-current {
    background: transparent;
    border-left-color: var(--accent);
    padding-left: 12px;
  }

  /* 首屏 */
  .hero {
    padding: 40px 0 48px;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding: 0 20px;
  }

  .hero-title,
  .hero-lead,
  .hero-note {
    max-width: none;
  }

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

  /* 容器内边距 */
  .inner-main,
  .section-inner,
  .fact-bar p,
  .fact-bar-text,
  .fact-bar-inner,
  .footer-inner,
  .site-error .error-main,
  .top-fact {
    padding-left: 20px;
    padding-right: 20px;
  }

  .inner-main > .section,
  .inner-main > .content-section,
  .inner-main > .faq-group,
  .inner-main > .entry-section {
    padding-left: 0;
    padding-right: 0;
  }

  /* 方向列表 */
  .direction-item-featured,
  .page-service-directions .section-directions .direction-item-featured {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

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

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

  /* 流程条与卡片列 */
  .stage-list,
  .stage-strip,
  .change-steps,
  .index-columns,
  .entry-grid,
  .misconception-grid,
  .footer-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .delivery-columns,
  .two-col-compare,
  .stage-columns {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .dependency-note {
    grid-column: 1 / -1;
  }

  .delivery-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .boundary-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }
}

@media (max-width: 600px) {

  h1 {
    font-size: 26px;
  }

  .page-title,
  .hero-title,
  .error-hero h1 {
    font-size: 26px;
  }

  .section,
  .content-section,
  .faq-group,
  .entry-section {
    padding: 36px 0;
  }

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

  .hero {
    padding: 32px 0 40px;
  }

  /* 全部多栏退为单栏 */
  .stage-list,
  .stage-strip,
  .change-steps,
  .index-columns,
  .entry-grid,
  .misconception-grid,
  .footer-groups,
  .dependency-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .section-preview .direction-item-compact {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
  }

  .section-preview .direction-item-compact .direction-for {
    grid-column: 1;
  }

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

  .direction-fields dd,
  .misconception-fields dd {
    margin-bottom: 8px;
  }

  .faq-question,
  .stall-summary {
    font-size: 16px;
    gap: 12px;
  }

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

  .btn {
    width: 100%;
  }

  .related-link {
    display: block;
    margin-right: 0;
  }
}