/* ============================================================
   BASE — 全局基础样式
   ============================================================ */
:root {
  --color-bg: #f5f1e8;
  --color-green: #1f3a34;
  --color-blue: #2c3a4f;
  --color-warm-gray: #6b6b5f;
  --color-border: #d8d2c4;
  --color-accent: #b5653d;
  --color-white: #ffffff;
  --color-text: #2a2a26;
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-mono: "SFMono-Regular", "Consolas", "Liberation Mono", monospace;
  --container-width: 1120px;
  --radius: 6px;
  --transition: 0.2s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  line-height: 1.4;
  font-weight: 600;
  color: var(--color-green);
}

h1 {
  font-size: 32px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 18px;
}

/* ============================================================
   LAYOUT — 全站统一外壳
   ============================================================ */
.site-main {
  flex: 1;
}

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

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  padding: 16px 0 8px;
  font-size: 14px;
}

.breadcrumb a {
  color: var(--color-warm-gray);
}

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

.breadcrumb-sep {
  margin: 0 8px;
  color: var(--color-border);
}

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

/* 页面标题区（内页统一） */
.page-header {
  padding: 24px 0 20px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 28px;
}

.page-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-green);
  letter-spacing: 0.02em;
}

/* 归档编号 */
.archive-code,
.archive-number {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-accent);
  background: rgba(181, 101, 61, 0.08);
  padding: 2px 10px;
  border-left: 3px solid var(--color-accent);
  margin-bottom: 12px;
}

/* 标题区通用 */
.section-title {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 12px;
}

.section-desc {
  color: var(--color-warm-gray);
  font-size: 15px;
}

/* 相关入口卡片 */
.entry-card-group,
.entry-grid,
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.entry-card,
.related-card {
  display: block;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px 20px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.entry-card:hover,
.related-card:hover {
  border-color: var(--color-green);
  box-shadow: 0 4px 16px rgba(31, 58, 52, 0.08);
}

.entry-code,
.entry-card-code,
.related-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.entry-title,
.entry-card-title,
.related-name {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-green);
  margin-bottom: 8px;
}

.entry-desc,
.entry-card-desc,
.related-desc {
  font-size: 14px;
  color: var(--color-warm-gray);
  line-height: 1.6;
}

/* ============================================================
   COMPONENTS — 通用组件
   ============================================================ */
/* 按钮 */
.btn-primary {
  display: inline-block;
  padding: 12px 28px;
  background: var(--color-green);
  color: var(--color-white);
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  transition: background var(--transition);
}

.btn-primary:hover {
  background: var(--color-accent);
  color: var(--color-white);
}

.btn-secondary {
  display: inline-block;
  padding: 12px 28px;
  background: transparent;
  color: var(--color-green);
  border: 1px solid var(--color-green);
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  transition: border-color var(--transition), color var(--transition);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* 文本链接 */
.text-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

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

/* 限制提示条 */
.limit-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.limit-item {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  color: var(--color-warm-gray);
  line-height: 1.6;
}

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

/* 图片容器约束 */
figure {
  margin: 0;
}

figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius);
}

figcaption {
  font-size: 13px;
  color: var(--color-warm-gray);
  text-align: center;
  padding: 8px 0 0;
}

/* ============================================================
   HEADER — 全站统一页头
   ============================================================ */
.site-header {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.brand-link {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-green);
  letter-spacing: 0.02em;
}

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

.nav-list {
  display: flex;
  gap: 4px;
  list-style: none;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  color: var(--color-warm-gray);
  border-radius: var(--radius);
  transition: color var(--transition), background var(--transition);
}

.nav-link:hover {
  color: var(--color-green);
  background: rgba(31, 58, 52, 0.06);
}

.nav-link.is-current {
  color: var(--color-green);
  font-weight: 600;
  background: rgba(31, 58, 52, 0.08);
}

/* 汉堡按钮（桌面隐藏） */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: none;
  cursor: pointer;
  gap: 5px;
  padding: 0;
}

.toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-green);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ============================================================
   FOOTER — 全站统一页脚
   ============================================================ */
.site-footer {
  background: var(--color-green);
  color: rgba(255, 255, 255, 0.85);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 2fr;
  gap: 40px;
}

.footer-block h3 {
  color: var(--color-white);
  font-size: 16px;
  margin-bottom: 14px;
}

.footer-brand {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 10px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
}

.footer-links li {
  margin-bottom: 8px;
}

.footer-link {
  color: rgba(255, 255, 255, 0.75);
  font-size: 14px;
  transition: color var(--transition);
}

.footer-link:hover {
  color: var(--color-white);
}

.footer-note {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.65);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding: 16px 24px;
  text-align: center;
}

.copyright {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
}

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

/* 首屏：档案馆索引 */
.archive-hero {
  background: var(--color-bg);
  padding: 56px 24px 40px;
}

.hero-content {
  max-width: var(--container-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}

.hero-kicker {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.hero-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-green);
  margin-bottom: 16px;
}

.hero-slogan {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-blue);
  margin-bottom: 16px;
}

.hero-desc {
  font-size: 16px;
  color: var(--color-warm-gray);
  line-height: 1.8;
  margin-bottom: 24px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-media {
  display: flex;
  justify-content: center;
}

.hero-figure {
  width: 100%;
  max-width: 480px;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.hero-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 栏目索引条 */
.hero-index {
  max-width: var(--container-width);
  margin: 40px auto 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
}

.index-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 16px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition), transform var(--transition);
}

.index-item:hover {
  border-color: var(--color-green);
  transform: translateY(-2px);
}

.index-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-accent);
  margin-bottom: 6px;
}

.index-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-green);
}

/* 服务定位与适用范围 */
.service-positioning {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 64px 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.section-kicker {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-accent);
  margin-bottom: 10px;
}

.positioning-left .section-title {
  margin-bottom: 20px;
}

.section-text {
  font-size: 15px;
  color: var(--color-warm-gray);
  line-height: 1.8;
  margin-bottom: 16px;
}

.scope-block {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 16px;
}

.block-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-green);
  margin-bottom: 12px;
}

.scope-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--color-warm-gray);
  line-height: 1.7;
  margin-bottom: 6px;
}

.scope-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
}

/* 服务档案速览 */
.archive-overview {
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 64px 24px;
}

.archive-overview .section-head {
  max-width: var(--container-width);
  margin: 0 auto 32px;
}

.archive-cards {
  max-width: var(--container-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

.archive-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color var(--transition), transform var(--transition);
}

.archive-card:hover {
  border-color: var(--color-green);
  transform: translateY(-2px);
}

.card-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-accent);
  margin-bottom: 10px;
}

.card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-green);
  margin-bottom: 10px;
}

.card-desc {
  font-size: 14px;
  color: var(--color-warm-gray);
  line-height: 1.7;
  margin-bottom: 16px;
}

.card-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
}

.card-link:hover {
  text-decoration: underline;
}

.overview-figure {
  max-width: var(--container-width);
  margin: 0 auto;
  aspect-ratio: 21 / 9;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.overview-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 交付与协作时间线 */
.delivery-timeline {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 64px 24px;
}

.delivery-timeline .section-head {
  margin-bottom: 40px;
}

.timeline-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
}

.timeline-grid::before {
  content: "";
  position: absolute;
  top: 20px;
  left: 5%;
  right: 5%;
  height: 2px;
  background: var(--color-border);
}

.timeline-node {
  position: relative;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px 20px;
  transition: border-color var(--transition);
}

.timeline-node:hover {
  border-color: var(--color-green);
}

.node-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--color-green);
  color: var(--color-white);
  font-family: var(--font-mono);
  font-size: 14px;
  border-radius: 50%;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.node-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-green);
  margin-bottom: 8px;
}

.node-desc {
  font-size: 14px;
  color: var(--color-warm-gray);
  line-height: 1.6;
}

/* FAQ 预览 */
.faq-preview {
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
  padding: 64px 24px;
}

.faq-preview .section-head {
  max-width: var(--container-width);
  margin: 0 auto 32px;
}

.faq-list {
  max-width: var(--container-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  overflow: hidden;
}

.faq-question {
  padding: 18px 24px;
  font-size: 16px;
  font-weight: 500;
  color: var(--color-green);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background var(--transition);
}

.faq-question:hover {
  background: rgba(31, 58, 52, 0.04);
}

.faq-question::after {
  content: "+";
  font-size: 20px;
  color: var(--color-accent);
  transition: transform var(--transition);
}

.faq-item[open] .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--color-warm-gray);
  line-height: 1.7;
}

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

.faq-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
}

.section-more {
  display: inline-block;
  max-width: var(--container-width);
  margin: 24px auto 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-green);
  text-align: center;
  width: 100%;
}

.section-more:hover {
  color: var(--color-accent);
}

/* 合作准备与限制 */
.cooperation-guide {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 64px 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.guide-left .section-title,
.guide-right .section-title {
  margin-bottom: 24px;
}

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

.prepare-list li {
  position: relative;
  padding-left: 32px;
  font-size: 15px;
  color: var(--color-warm-gray);
  line-height: 1.6;
}

.prepare-list li::before {
  content: "0" counter(item);
  counter-increment: item;
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-accent);
}

.prepare-list {
  counter-reset: item;
}

.guide-right .limit-list {
  margin-bottom: 32px;
}

/* 页脚引导区 */
.footer-guide {
  background: var(--color-blue);
  padding: 56px 24px;
}

.guide-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 32px;
}

.guide-title {
  font-size: 24px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 8px;
}

.guide-desc {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.75);
}

.guide-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.guide-link {
  display: inline-block;
  padding: 12px 24px;
  background: var(--color-white);
  color: var(--color-blue);
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}

.guide-link:hover {
  background: var(--color-accent);
  color: var(--color-white);
}

/* ============================================================
   PAGES — 服务目录（fuwu.html）
   ============================================================ */
.page-container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.page-title-area {
  margin-bottom: 32px;
}

.page-lead {
  font-size: 16px;
  color: var(--color-warm-gray);
  line-height: 1.8;
  max-width: 720px;
}

.service-index-section {
  margin-bottom: 48px;
}

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

.section-heading .section-title {
  margin-bottom: 8px;
}

.service-media {
  aspect-ratio: 21 / 9;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  margin-bottom: 32px;
}

.service-media-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.service-media-caption {
  font-size: 13px;
  color: var(--color-warm-gray);
  text-align: center;
  padding: 8px 0 0;
}

.service-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.service-item {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color var(--transition);
}

.service-item:hover {
  border-color: var(--color-green);
}

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

.service-no {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-accent);
  flex-shrink: 0;
}

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

.service-item-body p {
  font-size: 15px;
  color: var(--color-warm-gray);
  line-height: 1.7;
  margin-bottom: 8px;
}

.service-item-body .text-link {
  margin-top: 8px;
}

/* 服务边界 */
.boundary-section {
  background: rgba(181, 101, 61, 0.06);
  border-left: 4px solid var(--color-accent);
  padding: 24px;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-bottom: 48px;
}

.boundary-section .section-title {
  font-size: 18px;
  margin-bottom: 16px;
}

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

.boundary-item {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  color: var(--color-warm-gray);
  line-height: 1.6;
}

.boundary-item::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

/* 相关入口 */
.related-entry-section {
  margin-bottom: 48px;
}

.related-entry-section .section-title {
  margin-bottom: 24px;
}

/* ============================================================
   PAGES — 服务计划（jihua.html）
   ============================================================ */
.page-title-desc {
  font-size: 16px;
  color: var(--color-warm-gray);
  line-height: 1.8;
  max-width: 720px;
}

.plan-cards-section,
.timeline-section,
.suggestion-section {
  margin-bottom: 56px;
}

.section-code {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-accent);
  margin-bottom: 8px;
}

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

.plan-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color var(--transition), transform var(--transition);
}

.plan-card:hover {
  border-color: var(--color-green);
  transform: translateY(-2px);
}

.plan-card-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 16px;
}

.plan-card-number {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-accent);
}

.plan-card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-green);
}

.plan-card-desc {
  font-size: 14px;
  color: var(--color-warm-gray);
  line-height: 1.7;
  margin-bottom: 16px;
}

.plan-card-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.meta-row {
  display: flex;
  gap: 8px;
  font-size: 14px;
}

.meta-row dt {
  color: var(--color-warm-gray);
  flex-shrink: 0;
  min-width: 64px;
}

.meta-row dd {
  color: var(--color-green);
  font-weight: 500;
}

/* 时间线 */
.timeline-wrap {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 40px;
  align-items: start;
}

.timeline-figure {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  position: sticky;
  top: 80px;
}

.timeline-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.timeline-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}

.timeline-list::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  padding: 0 0 32px 40px;
}

.timeline-node {
  position: absolute;
  left: 6px;
  top: 4px;
  width: 14px;
  height: 14px;
  background: var(--color-accent);
  border: 3px solid var(--color-bg);
  border-radius: 50%;
  box-shadow: 0 0 0 2px var(--color-accent);
}

.timeline-content h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-green);
  margin-bottom: 6px;
}

.timeline-content p {
  font-size: 14px;
  color: var(--color-warm-gray);
  line-height: 1.7;
}

/* 选择建议 */
.suggestion-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.suggestion-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px 24px;
}

.suggestion-label {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-accent);
  background: rgba(181, 101, 61, 0.08);
  padding: 2px 10px;
  border-radius: 4px;
}

.suggestion-text {
  font-size: 15px;
  color: var(--color-warm-gray);
  line-height: 1.7;
}

.suggestion-links {
  display: flex;
  gap: 24px;
  margin-top: 24px;
}

.related-entry-title {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-green);
  margin-bottom: 24px;
}

/* ============================================================
   PAGES — 问题排查（wenti.html）
   ============================================================ */
.page-head {
  margin-bottom: 32px;
}

.page-desc {
  font-size: 16px;
  color: var(--color-warm-gray);
  line-height: 1.8;
  max-width: 720px;
}

.issue-quick-index {
  margin-bottom: 48px;
}

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

.index-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  transition: border-color var(--transition), transform var(--transition);
}

.index-card:hover {
  border-color: var(--color-green);
  transform: translateY(-2px);
}

.index-code {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-accent);
}

.index-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-green);
}

.index-desc {
  font-size: 13px;
  color: var(--color-warm-gray);
  line-height: 1.5;
}

/* 问题展开区 */
.issue-expand-area {
  margin-bottom: 48px;
}

.issue-group {
  margin-bottom: 32px;
}

.group-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-green);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 16px;
}

.issue-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-white);
  margin-bottom: 12px;
  overflow: hidden;
}

.issue-question {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-green);
  transition: background var(--transition);
}

.issue-question:hover {
  background: rgba(31, 58, 52, 0.04);
}

.issue-question::after {
  content: "+";
  margin-left: auto;
  font-size: 20px;
  color: var(--color-accent);
  transition: transform var(--transition);
}

.issue-item[open] .issue-question::after {
  transform: rotate(45deg);
}

.issue-number {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-accent);
  flex-shrink: 0;
}

.issue-answer {
  padding: 0 20px 20px;
  border-top: 1px solid var(--color-border);
}

.issue-answer .answer-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-green);
  margin-top: 16px;
  margin-bottom: 4px;
}

.issue-answer .answer-text {
  font-size: 14px;
  color: var(--color-warm-gray);
  line-height: 1.7;
}

/* 前置限制 */
.limit-notice {
  background: rgba(181, 101, 61, 0.06);
  border-left: 4px solid var(--color-accent);
  padding: 24px;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-bottom: 48px;
}

.limit-notice .section-title {
  font-size: 18px;
  margin-bottom: 16px;
}

/* 相关入口 */
.related-entry {
  margin-bottom: 48px;
}

.related-entry .section-title {
  margin-bottom: 24px;
}

/* 配图 */
.issue-figure {
  aspect-ratio: 21 / 9;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  margin-bottom: 48px;
}

.figure-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.figure-caption {
  font-size: 13px;
  color: var(--color-warm-gray);
  text-align: center;
  padding: 8px 0 0;
}

/* ============================================================
   PAGES — 合作流程（hezuo.html）
   ============================================================ */
.heading-desc {
  font-size: 16px;
  color: var(--color-warm-gray);
  line-height: 1.8;
  max-width: 720px;
}

.process-section {
  margin-bottom: 56px;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  counter-reset: step;
}

.process-step {
  position: relative;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 20px 20px;
  transition: border-color var(--transition), transform var(--transition);
}

.process-step:hover {
  border-color: var(--color-green);
  transform: translateY(-2px);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--color-green);
  color: var(--color-white);
  font-family: var(--font-mono);
  font-size: 14px;
  border-radius: 50%;
  margin-bottom: 14px;
}

.step-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-green);
  margin-bottom: 8px;
}

.step-desc {
  font-size: 14px;
  color: var(--color-warm-gray);
  line-height: 1.6;
  margin-bottom: 10px;
}

.step-output {
  font-size: 13px;
  color: var(--color-accent);
  background: rgba(181, 101, 61, 0.08);
  padding: 6px 10px;
  border-radius: 4px;
  display: inline-block;
}

/* 准备清单 */
.prepare-section {
  margin-bottom: 56px;
}

.prepare-text {
  margin-bottom: 24px;
}

.prepare-figure {
  aspect-ratio: 21 / 9;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  margin-bottom: 32px;
}

.prepare-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.prepare-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px 24px;
  transition: border-color var(--transition);
}

.prepare-item:hover {
  border-color: var(--color-green);
}

.item-code {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-accent);
  flex-shrink: 0;
  background: rgba(181, 101, 61, 0.08);
  padding: 2px 8px;
  border-radius: 4px;
}

.item-content h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-green);
  margin-bottom: 4px;
}

.item-content p {
  font-size: 14px;
  color: var(--color-warm-gray);
  line-height: 1.6;
}

/* 重要限制 */
.limit-section {
  background: rgba(181, 101, 61, 0.06);
  border-left: 4px solid var(--color-accent);
  padding: 24px;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-bottom: 56px;
}

.limit-section .section-title {
  font-size: 18px;
  margin-bottom: 16px;
}

/* 后续引导 */
.guide-section {
  background: var(--color-blue);
  padding: 40px 32px;
  border-radius: var(--radius);
  margin-bottom: 32px;
}

.guide-section .section-title {
  color: var(--color-white);
}

.guide-desc {
  color: rgba(255, 255, 255, 0.75);
  font-size: 15px;
  margin-bottom: 24px;
}

.guide-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.guide-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-white);
  color: var(--color-blue);
  padding: 12px 20px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}

.guide-link:hover {
  background: var(--color-accent);
  color: var(--color-white);
}

.guide-code {
  font-family: var(--font-mono);
  font-size: 12px;
  opacity: 0.7;
}

.related-links {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 16px 0;
  border-top: 1px solid var(--color-border);
}

.related-links-label {
  font-size: 14px;
  color: var(--color-warm-gray);
}

.related-links-item {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-green);
}

.related-links-item:hover {
  color: var(--color-accent);
}

/* ============================================================
   PAGES — 技术资料（ziliao.html）
   ============================================================ */
.page-shell {
  width: 100%;
}

.page-desc {
  font-size: 16px;
  color: var(--color-warm-gray);
  line-height: 1.8;
  max-width: 720px;
  margin-bottom: 40px;
}

.archive-section {
  margin-bottom: 48px;
}

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

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

.archive-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px 20px;
  transition: border-color var(--transition), transform var(--transition);
}

.archive-card:hover {
  border-color: var(--color-green);
  transform: translateY(-2px);
}

.card-top {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 12px;
}

.card-index {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-accent);
}

.card-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-green);
}

.card-text {
  font-size: 14px;
  color: var(--color-warm-gray);
  line-height: 1.6;
  margin-bottom: 10px;
}

.card-scope {
  font-size: 13px;
  color: var(--color-accent);
  background: rgba(181, 101, 61, 0.08);
  padding: 4px 8px;
  border-radius: 4px;
  display: inline-block;
}

/* 口径与格式说明、更新记录规则共用 */
.spec-list,
.rule-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.spec-item,
.rule-item {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px 24px;
}

.spec-title,
.rule-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-green);
  margin-bottom: 6px;
}

.spec-text,
.rule-text {
  font-size: 14px;
  color: var(--color-warm-gray);
  line-height: 1.7;
}

/* 相关入口 */
.related-section {
  margin-bottom: 48px;
}

.related-title {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-green);
  margin-bottom: 24px;
}

/* ============================================================
   PAGES — 404
   ============================================================ */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  flex: 1;
}

.error-section {
  text-align: center;
  max-width: 480px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 64px;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 24px;
  font-weight: 600;
  color: var(--color-green);
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-warm-gray);
  line-height: 1.7;
  margin-bottom: 24px;
}

.error-link {
  display: inline-block;
  padding: 12px 28px;
  background: var(--color-green);
  color: var(--color-white);
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  transition: background var(--transition);
}

.error-link:hover {
  background: var(--color-accent);
  color: var(--color-white);
}

/* ============================================================
   RESPONSIVE — 响应式
   ============================================================ */
@media (max-width: 768px) {
  /* 页头 */
  .header-inner {
    height: 56px;
    padding: 0 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: static;
  }

  .nav-list {
    display: none;
    position: fixed;
    top: 56px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-white);
    flex-direction: column;
    gap: 0;
    padding: 24px 16px;
    overflow-y: auto;
    z-index: 99;
  }

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

  .nav-item {
    width: 100%;
  }

  .nav-link {
    display: block;
    padding: 14px 16px;
    font-size: 16px;
    border-bottom: 1px solid var(--color-border);
    border-radius: 0;
  }

  .nav-link.is-current {
    background: rgba(31, 58, 52, 0.06);
  }

  /* 页脚 */
  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    padding: 40px 16px 24px;
  }

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

  .footer-bottom {
    padding: 12px 16px;
  }

  /* 首页 */
  .archive-hero {
    padding: 40px 16px 32px;
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  .hero-slogan {
    font-size: 18px;
  }

  .hero-figure {
    max-width: 100%;
  }

  .hero-index {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-top: 32px;
    padding-top: 20px;
  }

  .service-positioning {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 48px 16px;
  }

  .archive-overview {
    padding: 48px 16px;
  }

  .archive-cards {
    grid-template-columns: 1fr;
    gap: 16px;
    margin-bottom: 24px;
  }

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

  .delivery-timeline {
    padding: 48px 16px;
  }

  .timeline-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .timeline-grid::before {
    display: none;
  }

  .timeline-node {
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .node-num {
    margin-bottom: 0;
    flex-shrink: 0;
  }

  .faq-preview {
    padding: 48px 16px;
  }

  .faq-question {
    padding: 14px 16px;
    font-size: 15px;
  }

  .faq-answer {
    padding: 0 16px 16px;
  }

  .cooperation-guide {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 48px 16px;
  }

  .footer-guide {
    padding: 40px 16px;
  }

  .guide-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }

  .guide-links {
    width: 100%;
  }

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

  /* 内页通用 */
  .inner-main {
    padding: 0 16px;
  }

  .page-header {
    padding: 20px 0 16px;
    margin-bottom: 20px;
  }

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

  .page-container {
    padding: 0 16px;
  }

  .page-title-area {
    margin-bottom: 24px;
  }

  .page-lead,
  .page-title-desc,
  .page-desc,
  .heading-desc {
    font-size: 15px;
  }

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

  .entry-card-group,
  .entry-grid,
  .related-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  /* 服务目录 */
  .service-media {
    aspect-ratio: 16 / 9;
  }

  .service-item {
    padding: 20px 16px;
  }

  .service-item-head {
    flex-direction: column;
    gap: 4px;
  }

  .boundary-section {
    padding: 20px 16px;
  }

  /* 服务计划 */
  .plan-card-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .timeline-wrap {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .suggestion-item {
    flex-direction: column;
    gap: 8px;
    padding: 16px;
  }

  .suggestion-links {
    flex-direction: column;
    gap: 12px;
  }

  /* 问题排查 */
  .index-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .issue-question {
    padding: 14px 16px;
    font-size: 14px;
  }

  .issue-answer {
    padding: 0 16px 16px;
  }

  .limit-notice {
    padding: 20px 16px;
  }

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

  /* 合作流程 */
  .process-steps {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .process-step {
    padding: 20px 16px;
  }

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

  .prepare-item {
    flex-direction: column;
    gap: 8px;
    padding: 16px;
  }

  .limit-section {
    padding: 20px 16px;
  }

  .guide-section {
    padding: 32px 20px;
  }

  .guide-links {
    flex-direction: column;
  }

  .guide-link {
    width: 100%;
  }

  /* 技术资料 */
  .card-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .archive-card {
    padding: 20px 16px;
  }

  .spec-item,
  .rule-item {
    padding: 16px;
  }

  /* 404 */
  .error-main {
    padding: 60px 16px;
  }

  .error-code {
    font-size: 48px;
  }
}

@media (max-width: 480px) {
  .hero-index {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
    text-align: center;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }

  .brand-block {
    grid-column: auto;
  }
}

/* 滚动出现动画（增强，不影响初始可见性） */
@media (prefers-reduced-motion: no-preference) {
  .archive-card,
  .plan-card,
  .process-step,
  .index-card,
  .timeline-node,
  .entry-card,
  .related-card {
    transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  }
}

/* 程序验收反馈：移动端防溢出 */
@media (max-width: 768px) {
  .site-main,
  .site-main * {
    min-width: 0;
    max-width: 100%;
  }

  .site-main :is(h1, h2, h3, h4, p, a, span) {
    overflow-wrap: anywhere;
  }
}