/* ==========================================================================
   囧次元 · 通用型企业官网
   样式分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base
   -------------------------------------------------------------------------- */

:root {
  --paper: #fbfaf7;
  --surface: #ffffff;
  --ink: #1f2328;
  --ink-soft: #5b6470;
  --line: #e2e0da;
  --accent: #14625c;
  --accent-soft: #e7f1ef;
  --mark: #b4661f;
  --radius: 6px;
  --shell: 1120px;
  --prose: 760px;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--ink);
  font-weight: 700;
  line-height: 1.4;
}

p {
  margin: 0;
}

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

dl,
dt,
dd {
  margin: 0;
}

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

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

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

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

figure {
  margin: 0;
}

figcaption {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.7;
}

strong {
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   layout · 骨架
   -------------------------------------------------------------------------- */

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

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

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 14px 24px;
}

.site-nav {
  display: block;
}

.site-main {
  flex: 1 1 auto;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px 72px;
}

.inner-main {
  max-width: var(--shell);
  padding-top: 0;
}

.home-main {
  padding-top: 0;
}

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 48px;
}

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

/* --------------------------------------------------------------------------
   components · 顶部事实条与页头
   -------------------------------------------------------------------------- */

.fact-bar {
  margin: 0;
  padding: 9px 24px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 14px;
  line-height: 1.6;
  text-align: center;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

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

.brand::before {
  content: "";
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: var(--accent);
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 6px;
}

.nav-list li {
  display: block;
}

.nav-list a {
  display: block;
  padding: 8px 12px;
  border-bottom: 2px solid transparent;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.6;
}

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

.nav-list a.is-current {
  color: var(--ink);
  font-weight: 700;
  border-bottom-color: var(--accent);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  font-family: inherit;
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
}

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

/* --------------------------------------------------------------------------
   components · 通用按钮 / 标题组 / 折叠问答 / 相关入口
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  text-align: center;
  cursor: pointer;
}

.btn:hover,
.btn:focus-visible {
  text-decoration: none;
}

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

.btn-primary:hover,
.btn-primary:focus-visible {
  background: #0f4c47;
  border-color: #0f4c47;
}

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

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

.section-head {
  max-width: var(--prose);
  margin-bottom: 28px;
}

.section-title,
.section-intro,
.page-title {
  overflow-wrap: break-word;
}

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

.section-desc,
.section-intro,
.section-note {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.section-note {
  max-width: var(--prose);
  margin-bottom: 26px;
}

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

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

.faq-question {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  min-height: 44px;
  padding: 14px 2px;
  color: var(--ink);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.7;
  cursor: pointer;
  list-style: none;
}

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

.faq-question::before {
  content: "＋";
  flex: 0 0 auto;
  color: var(--accent);
  font-weight: 700;
  line-height: 1.7;
}

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

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

.faq-answer,
.faq-body {
  padding: 0 2px 18px 24px;
  color: var(--ink-soft);
  font-size: 15px;
}

.faq-answer p,
.faq-body p {
  margin-bottom: 10px;
}

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

.related-entry,
.related-entries,
.related-links {
  margin-top: 8px;
}

.related-list,
.entry-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.related-list a,
.entry-list a {
  display: block;
  min-height: 44px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--accent);
  font-size: 15px;
  line-height: 1.7;
}

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

/* --------------------------------------------------------------------------
   components · 面包屑与内页标题区
   -------------------------------------------------------------------------- */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 20px 0 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.7;
}

.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);
}

.page-header {
  max-width: var(--prose);
  padding: 28px 0 36px;
}

.page-title {
  font-size: 34px;
  line-height: 1.35;
}

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

.field-note {
  margin-top: 18px;
  padding: 12px 16px;
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--accent-soft);
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.8;
}

.field-note strong {
  color: var(--accent);
}

.field-note p + p {
  margin-top: 6px;
}

.field-note-label {
  color: var(--ink);
  font-weight: 700;
}

.field-legend {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 6px 16px;
  margin-top: 18px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  font-size: 14px;
}

.field-legend dt {
  color: var(--ink);
  font-weight: 700;
}

.field-legend dd {
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   components · 图片容器
   -------------------------------------------------------------------------- */

.hero-figure,
.direction-figure,
.section-media,
.page-media,
.page-figure {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

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

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

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

.section-media img {
  aspect-ratio: 21 / 9;
}

.page-media img {
  aspect-ratio: 21 / 9;
}

.page-figure img {
  aspect-ratio: 21 / 9;
}

.hero-figure figcaption,
.direction-figure figcaption,
.section-media figcaption,
.page-media figcaption,
.page-figure figcaption {
  padding: 0 16px 14px;
}

/* --------------------------------------------------------------------------
   components · 页脚
   -------------------------------------------------------------------------- */

.footer-inner {
  display: grid;
  grid-template-columns: minmax(240px, 1.4fr) repeat(4, minmax(0, 1fr));
  gap: 32px 28px;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 48px 24px 32px;
}

.footer-name {
  color: var(--ink);
  font-size: 18px;
  font-weight: 700;
}

.footer-desc {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.8;
}

.footer-col-title {
  font-size: 15px;
  font-weight: 700;
}

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

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

.footer-col ul {
  margin-top: 12px;
}

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

.footer-col li a {
  display: inline-block;
  min-height: 44px;
  padding: 10px 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.7;
}

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

.footer-copy {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 18px 24px 32px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.8;
}

/* --------------------------------------------------------------------------
   pages · 首页
   -------------------------------------------------------------------------- */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(300px, 1fr);
  gap: 40px;
  align-items: start;
  padding: 56px 0 44px;
}

.hero-copy {
  max-width: 640px;
}

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

.hero-lead {
  margin-top: 16px;
  color: var(--ink);
  font-size: 17px;
}

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

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

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

.panel-title {
  font-size: 16px;
  font-weight: 700;
}

.fact-list {
  margin-top: 16px;
}

.fact-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.fact-item dt {
  color: var(--ink-soft);
  font-size: 14px;
}

.fact-item dd {
  color: var(--ink);
  font-size: 14px;
  text-align: right;
}

.fact-num {
  display: inline-block;
  margin-right: 4px;
  color: var(--accent);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.2;
}

.panel-note {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.8;
}

.hero-figure {
  margin: 0 0 8px;
}

.section {
  padding: 48px 0;
  border-top: 1px solid var(--line);
}

.directions-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(260px, 1fr);
  gap: 40px;
  align-items: start;
}

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

.direction-row {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) auto;
  gap: 8px 20px;
  align-items: start;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.direction-no {
  color: var(--mark);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.7;
}

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

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

.direction-fit,
.direction-output {
  margin-top: 6px;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.8;
}

.direction-link {
  align-self: center;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 0;
  color: var(--accent);
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.direction-figure {
  position: sticky;
  top: 24px;
}

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

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

.stage-no {
  display: inline-block;
  color: var(--mark);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 14px;
  font-weight: 700;
}

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

.stage-action {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.8;
}

.stage-output {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  color: var(--ink);
  font-size: 14px;
  line-height: 1.8;
}

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

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

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

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

.col-list li {
  position: relative;
  padding: 8px 0 8px 20px;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.col-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 18px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.column-index {
  display: block;
}

.column-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.column-item a {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 100%;
  padding: 18px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

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

.column-name {
  color: var(--ink);
  font-size: 16px;
  font-weight: 700;
}

.column-desc {
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   pages · 服务方向
   -------------------------------------------------------------------------- */

.directions-detail .section-intro {
  max-width: var(--prose);
}

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

.direction-head {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.direction-head .direction-no {
  font-size: 14px;
}

.direction-head .direction-name {
  margin-top: 6px;
  font-size: 20px;
}

.direction-fields {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 10px 20px;
  margin-top: 16px;
}

.direction-fields dt {
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
}

.direction-fields dd {
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.boundary-compare {
  margin-top: 8px;
}

.compare-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 20px;
}

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

.compare-col h3 {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: 17px;
}

.compare-list {
  margin-top: 12px;
}

.compare-list li {
  position: relative;
  padding: 7px 0 7px 20px;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.compare-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 17px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

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

.self-check-step {
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  counter-increment: selfcheck;
}

.self-check-step .step-name {
  font-size: 17px;
}

.self-check-step .step-name::before {
  content: counter(selfcheck, decimal-leading-zero);
  display: block;
  margin-bottom: 6px;
  color: var(--mark);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 14px;
}

.self-check-step .step-question {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.self-check-steps {
  counter-reset: selfcheck;
}

/* --------------------------------------------------------------------------
   pages · 合作流程
   -------------------------------------------------------------------------- */

.page-media {
  max-width: var(--prose);
  margin-bottom: 40px;
}

.workflow-timeline .section-intro {
  max-width: var(--prose);
}

.stage {
  max-width: var(--prose);
  margin-top: 24px;
  padding: 24px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  background: var(--surface);
  scroll-margin-top: 24px;
}

.stage-title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 20px;
}

.stage-num {
  color: var(--mark);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 15px;
  font-weight: 700;
}

.stage-body {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 28px;
  margin-top: 16px;
}

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

.stage-col h4 {
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  font-size: 15px;
}

.stage-col ul {
  margin-top: 10px;
}

.stage-col li {
  position: relative;
  padding: 6px 0 6px 18px;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.stage-col li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 16px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

.stage .stage-output {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: 15px;
}

.stage .stage-output strong {
  color: var(--accent);
}

.materials {
  margin-top: 8px;
}

.material-group {
  max-width: var(--prose);
  margin-top: 20px;
  padding: 20px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.material-group h3 {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 17px;
}

.material-group ul {
  margin-top: 12px;
}

.material-group li {
  position: relative;
  padding: 6px 0 6px 18px;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.material-group li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 16px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

.blockers {
  margin-top: 8px;
}

.blocker {
  max-width: var(--prose);
  margin-top: 18px;
  padding: 20px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.blocker h3 {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 17px;
}

.blocker dl {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 8px 18px;
  margin-top: 12px;
}

.blocker dt {
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
}

.blocker dd {
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

/* --------------------------------------------------------------------------
   pages · 交付范围
   -------------------------------------------------------------------------- */

.delivery-list .section-note {
  max-width: var(--prose);
}

.delivery-item {
  max-width: var(--prose);
  margin-top: 18px;
  padding: 20px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  scroll-margin-top: 24px;
}

.delivery-item h3 {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: 18px;
}

.item-no {
  color: var(--mark);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 14px;
  font-weight: 700;
}

.item-fields {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 8px 18px;
  margin-top: 14px;
}

.item-fields dt {
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
}

.item-fields dd {
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.two-column {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  align-items: start;
}

.column {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  scroll-margin-top: 24px;
}

.column h3 {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: 18px;
}

.column h4 {
  margin-top: 16px;
  color: var(--accent);
  font-size: 15px;
}

.column p {
  margin-top: 8px;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.ordered-list {
  margin-top: 10px;
  padding-left: 20px;
  list-style: decimal;
}

.ordered-list li {
  padding: 4px 0;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.exclusion-list {
  margin-top: 12px;
}

.exclusion-list li {
  position: relative;
  padding: 8px 0 8px 20px;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.exclusion-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 17px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--mark);
}

.exclusion-list li strong {
  display: block;
  color: var(--ink);
}

.change-process {
  margin-top: 8px;
}

.change-step {
  max-width: var(--prose);
  margin-top: 16px;
  padding: 18px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.change-step h3 {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 17px;
}

.change-step .step-no {
  color: var(--mark);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 14px;
  font-weight: 700;
}

.change-step p {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.page-figure {
  max-width: var(--prose);
  margin-top: 44px;
}

/* --------------------------------------------------------------------------
   pages · 问题解答
   -------------------------------------------------------------------------- */

.question-group-nav {
  padding: 16px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.question-group-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.question-group-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--accent);
  font-size: 15px;
  font-weight: 700;
}

.question-group-nav a:hover,
.question-group-nav a:focus-visible {
  border-color: var(--accent);
  background: var(--accent-soft);
  text-decoration: none;
}

.faq-group {
  max-width: var(--prose);
  padding: 44px 0 8px;
  border-top: 1px solid var(--line);
  scroll-margin-top: 24px;
}

.faq-group:first-of-type {
  border-top: 0;
}

.faq-group h2 {
  font-size: 24px;
}

.group-intro {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.faq-group .faq-item {
  margin-top: 0;
}

.faq-group .faq-item:first-of-type {
  margin-top: 14px;
}

.prepare-block {
  max-width: var(--prose);
  margin-top: 40px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.prepare-block h2 {
  font-size: 24px;
}

.prepare-block > p {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.prepare-list {
  margin-top: 16px;
  counter-reset: prepare;
}

.prepare-list li {
  position: relative;
  padding: 10px 0 10px 44px;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
  counter-increment: prepare;
}

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

.prepare-step {
  position: absolute;
  left: 0;
  top: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: var(--radius);
  background: var(--accent-soft);
  color: var(--accent);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 14px;
  font-weight: 700;
}

.prepare-note {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 14px;
}

.related-links {
  max-width: var(--prose);
  margin-top: 44px;
}

.related-links h2 {
  font-size: 24px;
}

/* --------------------------------------------------------------------------
   pages · 404
   -------------------------------------------------------------------------- */

.error-panel {
  width: 100%;
  max-width: 640px;
  padding: 40px 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  text-align: center;
}

.error-code {
  color: var(--mark);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 40px;
  font-weight: 700;
  line-height: 1.2;
}

.error-title {
  margin-top: 12px;
  font-size: 26px;
}

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

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 24px;
}

.error-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.error-links a {
  display: block;
  min-height: 44px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--accent);
  font-size: 15px;
  line-height: 1.7;
}

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

/* --------------------------------------------------------------------------
   responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1024px) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
    padding: 44px 0 36px;
  }

  .hero-copy {
    max-width: none;
  }

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

  .direction-figure {
    position: static;
  }

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

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

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  .site-main {
    padding: 0 20px 56px;
  }

  .header-inner {
    padding: 12px 20px;
  }

  .nav-toggle {
    display: inline-flex;
  }

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

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

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

  .nav-list a {
    min-height: 44px;
    padding: 10px 4px;
    border-bottom: 0;
    border-left: 2px solid transparent;
    font-size: 16px;
  }

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

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

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

  .scope-columns,
  .two-column,
  .compare-pair,
  .self-check-steps {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .direction-row {
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 6px 14px;
  }

  .direction-link {
    grid-column: 2 / -1;
    justify-self: start;
  }

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

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

  .direction-fields dd,
  .item-fields dd,
  .blocker dd {
    margin-bottom: 10px;
  }

  .field-legend {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px 0;
  }

  .field-legend dd {
    margin-bottom: 8px;
  }

  .question-group-nav ul {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
  }

  .question-group-nav a {
    white-space: nowrap;
  }
}

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

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

  .header-inner,
  .footer-inner,
  .footer-copy {
    padding-left: 16px;
    padding-right: 16px;
  }

  .fact-bar {
    padding: 8px 16px;
    font-size: 13px;
  }

  .brand {
    font-size: 18px;
  }

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

  .section-title,
  .faq-group h2,
  .prepare-block h2,
  .related-links h2 {
    font-size: 20px;
  }

  .section {
    padding: 36px 0;
  }

  .direction-item,
  .stage,
  .material-group,
  .blocker,
  .delivery-item,
  .column,
  .compare-col,
  .scope-col,
  .prepare-block,
  .change-step {
    padding: 18px 16px;
  }

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

  .error-panel {
    padding: 28px 18px;
  }

  .error-code {
    font-size: 32px;
  }
}