:root {
  --bg-page: #F7FAFA;
  --bg-section: #EDF2F2;
  --bg-card: #FFFFFF;
  --text-main: #1E2A2E;
  --text-sub: #5A6B70;
  --accent: #0E7C7B;
  --accent-soft: #DCEEEE;
  --alert: #C2410C;
  --line: #D8E2E2;
  --line-strong: #B9CBCB;
  --radius: 6px;
  --radius-sm: 4px;
  --shadow-card: 0 1px 2px rgba(30, 42, 46, 0.06);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --container: 1160px;
  --container-narrow: 880px;
  --gap-lg: 48px;
  --gap-md: 28px;
  --gap-sm: 16px;
}

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

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--bg-page);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  font-weight: 400;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border: 0;
}

figure {
  margin: 0;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--text-main);
  font-weight: 700;
  line-height: 1.35;
}

p {
  margin: 0;
}

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

dl,
dt,
dd {
  margin: 0;
}

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

a:hover,
a:focus-visible {
  color: #0A5F5E;
}

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

button {
  font-family: inherit;
  font-size: 1rem;
  cursor: pointer;
}

/* ==========================================================
   layout — 全站骨架
   ========================================================== */

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: rgba(247, 250, 250, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: saturate(140%) blur(6px);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text-main);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: 0.02em;
}

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

.brand-mark {
  display: inline-block;
  width: 22px;
  height: 22px;
  border-radius: var(--radius-sm);
  background-color: var(--accent);
  box-shadow: inset 0 0 0 4px var(--accent-soft);
}

.brand-name {
  line-height: 1.2;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  background-color: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-main);
  border-radius: 1px;
}

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

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

.nav-list > li {
  display: block;
}

.nav-link {
  display: inline-block;
  padding: 8px 14px;
  color: var(--text-sub);
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border-bottom: 2px solid transparent;
}

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

.nav-link.is-current {
  color: var(--accent);
  font-weight: 700;
  background-color: var(--accent-soft);
  border-bottom-color: var(--accent);
}

.site-main {
  display: block;
  width: 100%;
  flex: 1 0 auto;
}

.section-inner,
.main-inner,
.site-inner {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.site-footer {
  margin-top: 72px;
  background-color: var(--bg-section);
  border-top: 1px solid var(--line);
}

.footer-inner {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 44px 24px 24px;
}

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

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

.footer-title {
  margin-bottom: 12px;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text-main);
}

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

.footer-list a {
  display: inline-block;
  padding: 4px 0;
  color: var(--text-sub);
  font-size: 0.9375rem;
  line-height: 1.6;
}

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

.footer-text {
  color: var(--text-sub);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding-top: 20px;
}

.footer-brand,
.footer-copy {
  color: var(--text-sub);
  font-size: 0.875rem;
}

/* 内页主容器 */
.inner-main {
  padding-bottom: 24px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 20px 24px 0;
  color: var(--text-sub);
  font-size: 0.875rem;
}

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

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

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

.breadcrumb-current {
  color: var(--text-main);
  font-weight: 500;
}

.page-header {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 20px 24px 8px;
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-main);
}

.page-description {
  margin-top: 12px;
  max-width: 780px;
  color: var(--text-sub);
  font-size: 1rem;
  line-height: 1.8;
}

/* 通用区块 */
.section {
  margin-top: var(--gap-lg);
}

.section-head {
  margin-bottom: 24px;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text-main);
}

.section-note,
.section-desc,
.section-intro,
.section-text {
  margin-top: 10px;
  max-width: 780px;
  color: var(--text-sub);
  font-size: 1rem;
  line-height: 1.8;
}

.section-title + .section-text,
.section-title + .section-intro,
.section-title + .section-desc {
  margin-top: 10px;
}

.field-label {
  display: inline-block;
  margin-right: 6px;
  color: var(--accent);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.column-title {
  margin-bottom: 14px;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-main);
}

.text-link {
  display: inline-block;
  margin-top: 16px;
  color: var(--accent);
  font-size: 0.9375rem;
  font-weight: 600;
  border-bottom: 1px solid var(--accent-soft);
  padding-bottom: 2px;
}

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

/* ==========================================================
   components — 通用组件
   ========================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

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

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: #0A5F5E;
  border-color: #0A5F5E;
  color: #FFFFFF;
}

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

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

/* 图片容器与说明 */
.hero-media,
.aside-media,
.steps-media,
.section-figure,
.archive-figure,
.process-figure,
.media-figure {
  overflow: hidden;
  border-radius: var(--radius);
  background-color: var(--bg-section);
}

.hero-media img,
.aside-media img,
.steps-media img,
.section-figure img,
.archive-figure img,
.process-figure img,
.media-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius);
}

.media-caption,
.figure-caption {
  margin-top: 10px;
  color: var(--text-sub);
  font-size: 0.875rem;
  line-height: 1.7;
}

/* 字段口径对照 */
.field-list,
.field-table {
  display: block;
}

.field-row {
  display: grid;
  grid-template-columns: minmax(120px, 180px) minmax(0, 1fr);
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

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

.field-name {
  color: var(--text-main);
  font-size: 0.9375rem;
  font-weight: 700;
}

.field-value,
.field-desc {
  color: var(--text-sub);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.field-table .field-name {
  padding-top: 14px;
}

.field-table .field-desc {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

/* 折叠条目 */
.faq-item {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 10px;
  transition: border-color 0.18s ease;
}

.faq-item:hover {
  border-color: var(--line-strong);
}

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

.faq-question {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 18px;
  min-height: 44px;
  color: var(--text-main);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.6;
  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: 1.6;
}

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

.faq-answer {
  padding: 0 18px 16px 42px;
  color: var(--text-sub);
  font-size: 0.9375rem;
  line-height: 1.8;
}

.faq-answer p + p {
  margin-top: 8px;
}

.faq-conclusion {
  color: var(--text-main);
  font-weight: 600;
}

.faq-next a {
  color: var(--accent);
  font-weight: 600;
  border-bottom: 1px solid var(--accent-soft);
}

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

/* ==========================================================
   pages — 首页
   ========================================================== */

.home-main {
  padding-bottom: 24px;
}

.hero-section {
  padding: 48px 0 8px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--gap-lg);
  align-items: center;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

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

.hero-eyebrow {
  display: inline-block;
  margin-bottom: 14px;
  padding: 4px 12px;
  color: var(--accent);
  background-color: var(--accent-soft);
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.hero-title {
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-main);
}

.hero-lead {
  margin-top: 16px;
  max-width: 560px;
  color: var(--text-sub);
  font-size: 1.0625rem;
  line-height: 1.8;
}

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

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

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

/* 核心目录条 */
.directory-section {
  margin-top: var(--gap-lg);
}

.directory-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
  margin-top: 20px;
}

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

.directory-link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  height: 100%;
  padding: 16px 18px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.directory-link:hover,
.directory-link:focus-visible {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.directory-name {
  color: var(--text-main);
  font-size: 1rem;
  font-weight: 700;
}

.directory-desc {
  color: var(--text-sub);
  font-size: 0.875rem;
  line-height: 1.7;
}

/* 服务方向总览 */
.directions-section {
  margin-top: var(--gap-lg);
}

.direction-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.direction-row {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr) minmax(0, 1fr) auto;
  gap: 18px;
  align-items: start;
  padding: 18px 20px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.direction-row:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

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

.direction-name {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-main);
}

.direction-desc {
  margin-top: 6px;
  color: var(--text-sub);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.direction-audience,
.direction-deliverable {
  min-width: 0;
  color: var(--text-sub);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.direction-link {
  align-self: center;
  display: inline-block;
  padding: 8px 16px;
  min-height: 40px;
  color: var(--accent);
  background-color: var(--accent-soft);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 700;
  white-space: nowrap;
}

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

/* 年度档案索引 */
.archive-section {
  margin-top: var(--gap-lg);
}

.archive-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: var(--gap-md);
  align-items: start;
}

.archive-column {
  min-width: 0;
  padding: 22px 24px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.archive-year-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.archive-year-item {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.archive-year-item:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.archive-year {
  display: inline-block;
  margin-bottom: 6px;
  color: var(--accent);
  font-size: 1rem;
  font-weight: 700;
}

.archive-entry-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.archive-entry {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  color: var(--text-sub);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.archive-topic {
  color: var(--text-main);
  font-weight: 600;
}

.archive-meta {
  color: var(--text-sub);
  font-size: 0.8125rem;
}

.archive-aside {
  min-width: 0;
  padding: 22px 24px;
  background-color: var(--bg-section);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.archive-aside .field-row {
  grid-template-columns: minmax(96px, 130px) minmax(0, 1fr);
}

.aside-media {
  margin-top: 18px;
}

.aside-media img {
  aspect-ratio: 3 / 2;
}

/* 工作步骤四阶段 */
.steps-section {
  margin-top: var(--gap-lg);
}

.step-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.step-item {
  min-width: 0;
  padding: 20px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-top: 3px solid var(--accent);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.step-index {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--accent);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.step-name {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-main);
}

.step-desc {
  margin-top: 8px;
  color: var(--text-sub);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.step-prep,
.step-node {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  color: var(--text-sub);
  font-size: 0.875rem;
  line-height: 1.7;
}

.steps-media {
  margin-top: 22px;
}

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

/* 合作准备清单与问题摘要 */
.prep-section {
  margin-top: var(--gap-lg);
}

.prep-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--gap-md);
  align-items: start;
  margin-top: 20px;
}

.prep-column {
  min-width: 0;
  padding: 22px 24px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

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

.prep-item {
  position: relative;
  padding-left: 20px;
  color: var(--text-sub);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.prep-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  background-color: var(--accent);
  border-radius: 2px;
}

.faq-mini {
  margin-top: 4px;
}

/* ==========================================================
   pages — 服务方向
   ========================================================== */

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 340px);
  gap: var(--gap-md);
  align-items: start;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 24px 24px 0;
}

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

.page-aside {
  min-width: 0;
  padding: 22px 24px;
  background-color: var(--bg-section);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.aside-title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 14px;
}

.aside-block + .aside-block {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.aside-subtitle {
  margin-bottom: 10px;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text-main);
}

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

.aside-item {
  color: var(--text-sub);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.aside-item a {
  color: var(--accent);
  font-weight: 600;
}

.aside-text {
  color: var(--text-sub);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.aside-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}

.aside-links a {
  color: var(--accent);
  font-size: 0.9375rem;
  font-weight: 600;
}

.section-directions .direction-item {
  padding: 20px 22px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.section-directions .direction-item + .direction-item {
  margin-top: 14px;
}

.section-directions .direction-name {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-main);
}

.section-directions .direction-scope {
  margin-top: 8px;
  color: var(--text-sub);
  font-size: 0.9375rem;
  line-height: 1.8;
}

.section-directions .direction-case {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  color: var(--text-sub);
  font-size: 0.9375rem;
  line-height: 1.75;
}

/* 适用 / 不适用对照 */
.fit-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap-sm);
  margin-top: 18px;
}

.fit-column {
  min-width: 0;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--bg-card);
}

.fit-yes {
  border-left: 3px solid var(--accent);
}

.fit-no {
  border-left: 3px solid var(--alert);
}

.fit-heading {
  margin-bottom: 12px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
}

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

.fit-item {
  position: relative;
  padding-left: 18px;
  color: var(--text-sub);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.fit-yes .fit-item::before,
.fit-no .fit-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.fit-yes .fit-item::before {
  background-color: var(--accent);
}

.fit-no .fit-item::before {
  background-color: var(--alert);
}

/* 成果形式 */
.section-figure {
  margin-top: 18px;
}

.section-figure img {
  aspect-ratio: 16 / 7;
}

.output-list {
  margin-top: 20px;
  border-top: 1px solid var(--line);
}

.output-term {
  padding-top: 14px;
  color: var(--text-main);
  font-size: 0.9375rem;
  font-weight: 700;
}

.output-desc {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  color: var(--text-sub);
  font-size: 0.9375rem;
  line-height: 1.75;
}

/* ==========================================================
   pages — 年度档案
   ========================================================== */

.archive-layout.sidebar-left {
  grid-template-columns: minmax(240px, 300px) minmax(0, 1fr);
}

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

.archive-layout .archive-aside {
  background-color: var(--bg-section);
}

.archive-layout .aside-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
}

.year-index {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 12px;
}

.year-index > li {
  display: block;
}

.year-link {
  display: block;
  padding: 8px 12px;
  min-height: 44px;
  color: var(--text-sub);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border-left: 3px solid transparent;
}

.year-link:hover,
.year-link:focus-visible {
  color: var(--accent);
  background-color: var(--bg-card);
}

.year-link.is-active {
  color: var(--accent);
  background-color: var(--bg-card);
  border-left-color: var(--accent);
}

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

.archive-intro {
  margin-bottom: var(--gap-md);
}

.intro-notes {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.intro-note {
  min-width: 0;
  padding: 14px 16px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text-sub);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.archive-groups {
  margin-bottom: var(--gap-md);
}

.year-group {
  margin-top: 22px;
  padding: 20px 22px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  scroll-margin-top: 90px;
}

.year-heading {
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
  color: var(--accent);
  font-size: 1.125rem;
  font-weight: 700;
}

.record-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.record-item {
  display: grid;
  grid-template-columns: minmax(64px, 84px) minmax(0, 1fr);
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}

.record-item:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.record-month {
  color: var(--text-sub);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.record-topic {
  color: var(--text-main);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.7;
}

.record-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 6px;
  color: var(--text-sub);
  font-size: 0.8125rem;
}

.record-type,
.record-output {
  display: inline-block;
  padding: 2px 10px;
  background-color: var(--accent-soft);
  color: var(--accent);
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  font-weight: 600;
}

.archive-figure {
  margin-bottom: var(--gap-md);
}

.archive-figure img {
  aspect-ratio: 16 / 7;
}

.archive-fields .field-name {
  padding-top: 14px;
}

.archive-fields .field-desc {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  color: var(--text-sub);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.archive-fields .field-desc a {
  font-weight: 600;
}

/* ==========================================================
   pages — 合作流程
   ========================================================== */

.process-overview,
.process-prepare,
.process-feedback {
  width: 100%;
  max-width: var(--container);
  margin: var(--gap-lg) auto 0;
  padding: 0 24px;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 20px;
}

.process-step {
  min-width: 0;
  padding: 20px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-top: 3px solid var(--accent);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.process-step .step-index {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--accent);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.process-step .step-name {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-main);
}

.step-goal {
  margin-top: 8px;
  color: var(--text-sub);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.step-output {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  color: var(--text-sub);
  font-size: 0.875rem;
  line-height: 1.7;
}

.process-figure {
  margin-top: 22px;
}

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

.process-figure figcaption {
  margin-top: 10px;
  color: var(--text-sub);
  font-size: 0.875rem;
  line-height: 1.7;
}

.prepare-groups {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 20px;
}

.prepare-group {
  min-width: 0;
  padding: 20px 22px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.prepare-stage {
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
  color: var(--text-main);
  font-size: 1.0625rem;
  font-weight: 700;
}

.prepare-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap-sm);
}

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

.prepare-col-title {
  margin-bottom: 10px;
  color: var(--accent);
  font-size: 0.9375rem;
  font-weight: 700;
}

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

.prepare-list > li {
  position: relative;
  padding-left: 18px;
  color: var(--text-sub);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.prepare-list > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background-color: var(--accent);
  border-radius: 50%;
}

.prepare-node {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  color: var(--text-sub);
  font-size: 0.875rem;
  line-height: 1.7;
}

.process-feedback {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 300px);
  gap: var(--gap-md);
  align-items: start;
}

.process-feedback .section-head {
  grid-column: 1;
}

.feedback-list {
  grid-column: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 4px;
}

.feedback-item {
  min-width: 0;
  padding: 18px 20px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.feedback-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
}

.feedback-text {
  margin-top: 8px;
  color: var(--text-sub);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.process-related {
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: start;
  padding: 22px 24px;
  background-color: var(--bg-section);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.related-title {
  margin-bottom: 12px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
}

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

.related-list a {
  color: var(--accent);
  font-size: 0.9375rem;
  font-weight: 600;
}

/* ==========================================================
   pages — 常见问题
   ========================================================== */

.faq-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: var(--gap-md);
  align-items: center;
  width: 100%;
  max-width: var(--container);
  margin: var(--gap-lg) auto 0;
  padding: 0 24px;
}

.faq-intro-media {
  min-width: 0;
}

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

.faq-intro-body {
  min-width: 0;
}

.faq-intro-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}

.faq-intro-item {
  position: relative;
  padding-left: 20px;
  color: var(--text-sub);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.faq-intro-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  background-color: var(--accent);
  border-radius: 2px;
}

.faq-group {
  width: 100%;
  max-width: var(--container);
  margin: var(--gap-lg) auto 0;
  padding: 0 24px;
}

.faq-list {
  margin-top: 18px;
}

.faq-related {
  width: 100%;
  max-width: var(--container);
  margin: var(--gap-lg) auto 0;
  padding: 0 24px;
}

.faq-related .related-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

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

.related-link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  height: 100%;
  padding: 16px 18px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.related-link:hover,
.related-link:focus-visible {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.related-name {
  color: var(--text-main);
  font-size: 1rem;
  font-weight: 700;
}

.related-desc {
  color: var(--text-sub);
  font-size: 0.875rem;
  line-height: 1.7;
}

/* ==========================================================
   pages — 404
   ========================================================== */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 64px 0;
}

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

.error-code {
  color: var(--accent);
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.error-panel h1 {
  margin-top: 10px;
  font-size: 1.5rem;
  font-weight: 700;
}

.error-text {
  margin-top: 12px;
  color: var(--text-sub);
  font-size: 1rem;
  line-height: 1.8;
}

.error-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 24px;
}

.error-links a {
  display: inline-block;
  padding: 10px 18px;
  min-height: 44px;
  color: var(--accent);
  background-color: var(--accent-soft);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 600;
}

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

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

@media (max-width: 1080px) {
  .directory-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .step-list,
  .process-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .direction-link {
    justify-self: start;
  }
}

@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--gap-md);
  }

  .hero-title {
    font-size: 1.875rem;
  }

  .archive-layout,
  .archive-layout.sidebar-left,
  .page-layout,
  .prep-layout,
  .faq-intro,
  .process-feedback {
    grid-template-columns: minmax(0, 1fr);
  }

  .archive-layout.sidebar-left .archive-aside {
    order: 0;
  }

  .process-feedback .section-head,
  .feedback-list,
  .process-related {
    grid-column: 1;
  }

  .process-related {
    grid-row: auto;
  }

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

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

@media (max-width: 760px) {
  .header-inner {
    flex-wrap: wrap;
    padding: 12px 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    flex-basis: 100%;
    order: 3;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    width: 100%;
    padding: 10px 0 4px;
    border-top: 1px solid var(--line);
  }

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

  .nav-link {
    display: block;
    padding: 12px 14px;
    min-height: 44px;
    font-size: 1rem;
    border-bottom: 0;
    border-left: 3px solid transparent;
  }

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

  .section-inner,
  .main-inner,
  .site-inner,
  .breadcrumb,
  .page-header,
  .footer-inner,
  .hero-inner,
  .page-layout,
  .process-overview,
  .process-prepare,
  .process-feedback,
  .faq-intro,
  .faq-group,
  .faq-related {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero-section {
    padding-top: 32px;
  }

  .hero-title {
    font-size: 1.625rem;
  }

  .hero-lead {
    font-size: 1rem;
  }

  .page-title {
    font-size: 1.625rem;
  }

  .section-title {
    font-size: 1.25rem;
  }

  .directory-list,
  .step-list,
  .process-steps,
  .intro-notes,
  .faq-related .related-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .direction-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .direction-link {
    justify-self: start;
  }

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

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

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

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

  .hero-actions .btn {
    width: 100%;
  }

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

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

  .archive-aside .field-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .faq-answer {
    padding-left: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}