/* ============================================================
   BASE — 全局基础样式
   ============================================================ */
:root {
  --color-bg: #F7F6F2;
  --color-text: #2B2A27;
  --color-brand: #6D8B85;
  --color-brand-dark: #58726D;
  --color-camel: #B28A6B;
  --color-purple: #8D8496;
  --color-line: #E5E1D6;
  --color-white: #FFFFFF;
  --color-text-light: #6E6C66;
  --font-serif: "Songti SC", "SimSun", "Noto Serif SC", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --container-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-card: 0 1px 3px rgba(43, 42, 39, 0.06);
  --transition: 0.25s ease;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  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-brand-dark);
  text-decoration: none;
  transition: color var(--transition);
}

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

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-text);
}

h1 {
  font-size: 28px;
}

h2 {
  font-size: 22px;
}

h3 {
  font-size: 17px;
}

p {
  margin-bottom: 0.5em;
}

time {
  font-variant-numeric: tabular-nums;
  font-size: 0.9em;
  color: var(--color-text-light);
}

/* ============================================================
   LAYOUT — 全站布局骨架
   ============================================================ */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-header {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-line);
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
}

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

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

.home-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 64px;
  width: 100%;
}

.site-footer {
  width: 100%;
  background-color: var(--color-white);
  border-top: 1px solid var(--color-line);
  margin-top: auto;
}

/* ============================================================
   COMPONENTS — 页头导航、面包屑、页脚、状态标签、通用模块
   ============================================================ */

/* ---- 品牌 Logo ---- */
.brand-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
}

.brand-logo:hover {
  text-decoration: none;
}

.brand-text {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.brand-text::first-letter {
  color: var(--color-brand);
}

/* ---- 导航 ---- */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border-radius: var(--radius-sm);
  align-items: center;
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

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

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

.nav-item {
  position: relative;
}

.nav-link {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: color var(--transition), background-color var(--transition);
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--color-brand-dark);
  background-color: rgba(109, 139, 133, 0.08);
}

.nav-link.is-current {
  color: var(--color-brand-dark);
  font-weight: 600;
}

.nav-link.is-current::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 14px;
  right: 14px;
  height: 2px;
  background-color: var(--color-brand);
  border-radius: 1px;
}

/* ---- 面包屑 ---- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 24px;
  padding: 0;
  flex-wrap: wrap;
}

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

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

.breadcrumb-sep {
  color: var(--color-line);
  font-size: 12px;
}

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

/* ---- 页面标题区 ---- */
.page-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-line);
}

.page-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
  line-height: 1.4;
}

.page-description {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text-light);
  max-width: 720px;
}

/* ---- 状态标签 ---- */
.status-tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.6;
  white-space: nowrap;
}

.status-tag-green {
  background-color: rgba(109, 139, 133, 0.12);
  color: var(--color-brand-dark);
}

.status-tag-camel {
  background-color: rgba(178, 138, 107, 0.15);
  color: var(--color-camel);
}

.status-tag-purple {
  background-color: rgba(141, 132, 150, 0.14);
  color: var(--color-purple);
}

.status-tag-blue {
  background-color: rgba(110, 140, 170, 0.12);
  color: #4A6E8A;
}

/* ---- Section 标题 ---- */
.section-title {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
  font-family: var(--font-serif);
}

.section-lead {
  font-size: 16px;
  color: var(--color-text-light);
  margin-bottom: 24px;
  line-height: 1.8;
}

.section-paragraph {
  margin-bottom: 16px;
  line-height: 1.8;
}

/* ---- 页脚 ---- */
.footer-top {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 48px;
}

.footer-brand-name {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.footer-brand-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

.footer-nav-title,
.footer-info-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 14px;
}

.footer-nav-list li {
  margin-bottom: 6px;
}

.footer-nav-list a {
  font-size: 14px;
  color: var(--color-text-light);
}

.footer-nav-list a:hover {
  color: var(--color-brand-dark);
}

.footer-info-text {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

.footer-bottom {
  border-top: 1px solid var(--color-line);
  padding: 20px 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 4px;
}

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

/* ---- 图片容器 ---- */
figure {
  margin: 0;
}

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

figcaption {
  font-size: 13px;
  color: var(--color-text-light);
  padding: 8px 4px 0;
  line-height: 1.6;
}

/* ============================================================
   COMPONENTS — 首页模块
   ============================================================ */

/* ---- Hero 首屏 ---- */
.hero-section {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  padding: 48px 0 56px;
  align-items: center;
}

.hero-media {
  position: relative;
}

.hero-figure img {
  aspect-ratio: 4 / 3;
  width: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero-title {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 0;
}

.hero-subtitle {
  font-size: 16px;
  color: var(--color-text-light);
  line-height: 1.8;
}

.hero-actions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.hero-action-link {
  display: block;
  padding: 14px 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: 15px;
  font-weight: 500;
  transition: border-color var(--transition), background-color var(--transition), transform var(--transition);
}

.hero-action-link:hover {
  border-color: var(--color-brand);
  background-color: rgba(109, 139, 133, 0.06);
  color: var(--color-brand-dark);
  transform: translateX(4px);
}

.hero-announcements {
  border-top: 1px solid var(--color-line);
  padding-top: 20px;
}

.update-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-light);
  display: block;
  margin-bottom: 8px;
}

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

.announcement-mini-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  flex-wrap: wrap;
}

.announcement-mini-list a {
  color: var(--color-text);
}

.announcement-mini-list a:hover {
  color: var(--color-brand-dark);
}

.announcement-mini-list time {
  font-size: 13px;
}

/* ---- 服务定位区 ---- */
.service-positioning {
  padding: 48px 0;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.positioning-text,
.commitment-text {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  max-width: 860px;
}

.commitment-text {
  color: var(--color-text-light);
}

.service-positioning .status-tag {
  justify-self: start;
}

/* ---- IP 时间线（首页） ---- */
.ip-timeline {
  padding: 56px 0;
}

.timeline-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  position: relative;
}

.timeline-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.timeline-card:hover {
  border-color: var(--color-brand);
  box-shadow: 0 2px 8px rgba(43, 42, 39, 0.08);
}

.timeline-marker {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-brand);
  position: absolute;
  left: -5px;
  top: 28px;
}

.timeline-card .card-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  font-family: var(--font-serif);
}

.timeline-card .status-tag {
  margin-right: 8px;
  margin-bottom: 8px;
}

.timeline-card .update-time {
  font-size: 13px;
  color: var(--color-text-light);
}

.card-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-light);
  margin-top: 8px;
}

/* ---- 服务摘要 ---- */
.service-summary {
  padding: 56px 0;
  border-top: 1px solid var(--color-line);
}

.service-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px 24px;
}

.service-item {
  display: flex;
  gap: 16px;
  padding: 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  transition: border-color var(--transition);
}

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

.service-num {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-brand);
  line-height: 1.2;
  flex-shrink: 0;
  min-width: 28px;
}

.service-name {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 4px;
  font-family: var(--font-serif);
}

.service-brief {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ---- 合作流程预览 ---- */
.process-preview {
  padding: 56px 0;
  border-top: 1px solid var(--color-line);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.process-step {
  padding: 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  transition: border-color var(--transition);
}

.process-step:hover {
  border-color: var(--color-brand);
}

.step-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
  font-family: var(--font-serif);
}

.step-input,
.step-output {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 4px;
}

.section-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-brand-dark);
  padding: 8px 0;
}

.section-link::after {
  content: "→";
  font-size: 14px;
  transition: transform var(--transition);
}

.section-link:hover::after {
  transform: translateX(4px);
}

/* ---- FAQ 预览 ---- */
.faq-preview {
  padding: 56px 0;
  border-top: 1px solid var(--color-line);
}

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

.faq-item summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  transition: background-color var(--transition);
}

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

.faq-item summary::after {
  content: "+";
  font-size: 18px;
  color: var(--color-brand);
  flex-shrink: 0;
  transition: transform var(--transition);
}

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

.faq-item summary:hover {
  background-color: rgba(109, 139, 133, 0.04);
}

.faq-answer {
  padding: 0 20px 16px;
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* ---- 公告列表 ---- */
.announcements {
  padding: 56px 0;
  border-top: 1px solid var(--color-line);
}

.announcement-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.announcement-item {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 20px;
  align-items: center;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 16px;
  transition: border-color var(--transition);
}

.announcement-item:hover {
  border-color: var(--color-brand);
}

.announcement-figure img {
  aspect-ratio: 16 / 9;
  width: 100%;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.announcement-content {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.announcement-content a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.6;
}

.announcement-content a:hover {
  color: var(--color-brand-dark);
}

.announcement-content .status-tag {
  align-self: flex-start;
}

.announcement-content time {
  font-size: 13px;
}

/* ---- 信息边界声明 ---- */
.boundary-notice {
  padding: 40px 0;
  border-top: 1px solid var(--color-line);
}

.boundary-text {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
  background-color: rgba(109, 139, 133, 0.04);
  border-left: 3px solid var(--color-brand);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* ============================================================
   COMPONENTS — 侧栏与目录
   ============================================================ */
.layout-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 40px;
  align-items: start;
  width: 100%;
}

.layout-shell.sidebar-left {
  grid-template-columns: 280px minmax(0, 1fr);
}

.layout-shell.sidebar-left .page-aside,
.layout-shell.sidebar-left .faq-topics-aside {
  grid-column: 1;
  grid-row: 1;
}

.layout-shell.sidebar-left .inner-main,
.layout-shell.sidebar-left .faq-content {
  grid-column: 2;
  grid-row: 1;
}

/* 品牌页：aside 与 main 是 layout-shell 的直接子元素 */
.page-aside {
  position: sticky;
  top: 96px;
}

.toc-box {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px;
}

.toc-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--color-text);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-line);
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.toc-item a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--color-text-light);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition), color var(--transition);
}

.toc-item a:hover {
  background-color: rgba(109, 139, 133, 0.08);
  color: var(--color-brand-dark);
}

/* ---- FAQ 主题侧栏 ---- */
.faq-topics-aside {
  position: sticky;
  top: 96px;
}

.aside-inner {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px;
}

.aside-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--color-text);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-line);
}

.topic-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.topic-item a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--color-text-light);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition), color var(--transition);
}

.topic-item a:hover {
  background-color: rgba(109, 139, 133, 0.08);
  color: var(--color-brand-dark);
}

.aside-contact {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--color-line);
}

.aside-contact-text {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 8px;
}

.aside-contact-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-brand-dark);
}

/* ---- 指南页目录 ---- */
.layout-aside {
  position: sticky;
  top: 96px;
}

.aside-toc {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px;
}

.aside-toc-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--color-text);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-line);
}

.aside-toc-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.aside-toc-item a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--color-text-light);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition), color var(--transition);
}

.aside-toc-item a:hover {
  background-color: rgba(109, 139, 133, 0.08);
  color: var(--color-brand-dark);
}

/* ============================================================
   COMPONENTS — 相关入口带
   ============================================================ */
.related-links {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--color-line);
}

.related-links-title,
.related-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 20px;
  font-family: var(--font-serif);
}

.link-band {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.link-item {
  display: block;
  padding: 16px 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  transition: border-color var(--transition), color var(--transition);
}

.link-item:hover {
  border-color: var(--color-brand);
  color: var(--color-brand-dark);
}

.related-links-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.related-link {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--color-text);
  transition: border-color var(--transition), color var(--transition);
}

.related-link:hover {
  border-color: var(--color-brand);
  color: var(--color-brand-dark);
}

.related-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.related-item a {
  display: block;
  padding: 14px 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--color-text);
  transition: border-color var(--transition), color var(--transition);
}

.related-item a:hover {
  border-color: var(--color-brand);
  color: var(--color-brand-dark);
}

/* ============================================================
   PAGES — 品牌页
   ============================================================ */

/* 品牌定位 */
.brand-intro {
  margin-bottom: 48px;
}

.brand-figure {
  margin: 24px 0;
}

.brand-figure img {
  aspect-ratio: 16 / 9;
  width: 100%;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* 品牌页时间线 */
.timeline-wrap {
  position: relative;
  padding-left: 24px;
}

.timeline-wrap::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--color-line);
}

.timeline-item {
  position: relative;
  margin-bottom: 24px;
}

.timeline-item .timeline-marker {
  left: -24px;
  top: 8px;
  width: 16px;
  height: 16px;
  border: 3px solid var(--color-white);
  box-shadow: 0 0 0 2px var(--color-brand);
  background-color: var(--color-brand);
  border-radius: 50%;
}

.timeline-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.timeline-card:hover {
  border-color: var(--color-brand);
  box-shadow: 0 2px 8px rgba(43, 42, 39, 0.08);
}

.timeline-phase {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-brand);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.timeline-name {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  font-family: var(--font-serif);
}

.timeline-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 8px;
}

.timeline-meta {
  font-size: 13px;
  color: var(--color-text-light);
}

/* IP 资料卡 */
.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.ip-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.ip-card:hover {
  border-color: var(--color-brand);
  box-shadow: 0 2px 8px rgba(43, 42, 39, 0.08);
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.card-name {
  font-size: 17px;
  font-weight: 600;
  font-family: var(--font-serif);
}

.card-content {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 12px;
}

.card-update {
  font-size: 13px;
  color: var(--color-text-light);
}

/* ============================================================
   PAGES — 服务页
   ============================================================ */
.service-intro {
  margin-bottom: 40px;
}

.service-intro p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text-light);
  max-width: 860px;
}

.service-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 48px;
}

.service-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.service-item:hover {
  border-color: var(--color-brand);
  box-shadow: 0 2px 8px rgba(43, 42, 39, 0.08);
}

.service-item-head {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--color-line);
  background-color: rgba(247, 246, 242, 0.5);
}

.service-no {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-brand);
  line-height: 1;
  flex-shrink: 0;
  min-width: 32px;
}

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

.service-item-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  padding: 20px 24px;
}

.service-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-light);
  text-transform: uppercase;
  margin-bottom: 8px;
  letter-spacing: 0.03em;
}

.service-scope ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.service-scope li {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
  padding-left: 16px;
  position: relative;
}

.service-scope li::before {
  content: "·";
  position: absolute;
  left: 4px;
  color: var(--color-brand);
  font-weight: 700;
}

.service-deliver p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
}

.scope-note {
  background-color: rgba(109, 139, 133, 0.05);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 32px;
}

.scope-note .section-title {
  font-size: 18px;
}

.scope-note p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 12px;
}

.scope-note ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.scope-note li {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
  padding-left: 16px;
  position: relative;
}

.scope-note li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--color-brand);
}

/* ============================================================
   PAGES — 合作流程页
   ============================================================ */
.process-timeline {
  margin-bottom: 48px;
  position: relative;
}

.process-timeline::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 40px;
  bottom: 40px;
  width: 2px;
  background-color: var(--color-line);
}

.timeline-step {
  position: relative;
  padding-left: 56px;
  margin-bottom: 24px;
}

.timeline-step .timeline-marker {
  position: absolute;
  left: 0;
  top: 8px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--color-brand);
  border: 3px solid var(--color-white);
  box-shadow: 0 0 0 2px var(--color-line);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 700;
  color: var(--color-white);
}

.timeline-step .timeline-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.timeline-step .timeline-card:hover {
  border-color: var(--color-brand);
  box-shadow: 0 2px 8px rgba(43, 42, 39, 0.08);
}

.timeline-card-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 12px;
  font-family: var(--font-serif);
}

.timeline-card-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-brand-dark);
  margin-bottom: 2px;
  margin-top: 8px;
}

.timeline-card-label:first-of-type {
  margin-top: 0;
}

.timeline-card-text {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 4px;
}

/* 准备清单 */
.preparation {
  margin-bottom: 40px;
}

.section-desc {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.preparation-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.preparation-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  font-size: 14px;
  line-height: 1.7;
}

.preparation-item::before {
  content: "□";
  color: var(--color-brand);
  font-size: 16px;
  flex-shrink: 0;
  line-height: 1.4;
}

/* 责任边界 */
.boundary-note {
  background-color: rgba(178, 138, 107, 0.06);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 32px;
}

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

.boundary-item {
  font-size: 14px;
  line-height: 1.7;
  padding-left: 20px;
  position: relative;
  color: var(--color-text);
}

.boundary-item::before {
  content: "※";
  position: absolute;
  left: 0;
  color: var(--color-camel);
  font-size: 13px;
}

/* ============================================================
   PAGES — FAQ 页
   ============================================================ */
.faq-content {
  min-width: 0;
}

.faq-group {
  margin-bottom: 40px;
  scroll-margin-top: 96px;
}

.faq-group-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 16px;
  font-family: var(--font-serif);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
}

.content-media-inline {
  margin-bottom: 20px;
}

.content-media-inline img {
  aspect-ratio: 16 / 9;
  width: 100%;
  object-fit: cover;
  border-radius: var(--radius-md);
}

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

.faq-item summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  transition: background-color var(--transition);
}

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

.faq-item summary::after {
  content: "+";
  font-size: 18px;
  color: var(--color-brand);
  flex-shrink: 0;
  transition: transform var(--transition);
}

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

.faq-item summary:hover {
  background-color: rgba(109, 139, 133, 0.04);
}

.faq-answer {
  padding: 0 20px 16px;
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* ============================================================
   PAGES — 内容指南页
   ============================================================ */
.layout-main {
  min-width: 0;
}

.guide-section {
  margin-bottom: 48px;
  scroll-margin-top: 96px;
}

.guide-figure {
  margin: 20px 0;
}

.guide-figure img {
  aspect-ratio: 16 / 9;
  width: 100%;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.guide-block {
  margin-bottom: 24px;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.block-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
  font-family: var(--font-serif);
}

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

.guide-list li {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text);
  padding-left: 16px;
  position: relative;
}

.guide-list li::before {
  content: "·";
  position: absolute;
  left: 4px;
  color: var(--color-brand);
  font-weight: 700;
}

.checklist {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}

.checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 18px;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  font-size: 14px;
  line-height: 1.7;
}

.checklist-item::before {
  content: "□";
  color: var(--color-brand);
  font-size: 15px;
  flex-shrink: 0;
  line-height: 1.4;
}

.section-note {
  font-size: 13px;
  color: var(--color-text-light);
  background-color: rgba(109, 139, 133, 0.04);
  border-left: 3px solid var(--color-brand);
  padding: 12px 16px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  line-height: 1.7;
}

/* ============================================================
   PAGES — 合作咨询页
   ============================================================ */
.contact-intro {
  margin-bottom: 40px;
}

.contact-intro h2 {
  font-size: 20px;
  margin-bottom: 12px;
  font-family: var(--font-serif);
}

.contact-intro p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  max-width: 860px;
}

.contact-steps {
  margin-bottom: 48px;
}

.contact-steps > h2 {
  font-size: 20px;
  margin-bottom: 12px;
  font-family: var(--font-serif);
}

.contact-steps > p {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 24px;
}

.steps-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.step-item {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 20px;
  align-items: start;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  transition: border-color var(--transition);
}

.step-item:hover {
  border-color: var(--color-brand);
}

.step-number {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--color-brand);
  color: var(--color-white);
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step-content h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  font-family: var(--font-serif);
}

.step-input {
  font-size: 13px;
  color: var(--color-brand-dark);
  font-weight: 500;
  margin-bottom: 4px;
}

.step-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

.step-figure {
  margin-top: 16px;
}

.step-figure img {
  aspect-ratio: 16 / 9;
  width: 100%;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* 咨询页准备清单 */
.preparation h2 {
  font-size: 20px;
  margin-bottom: 12px;
  font-family: var(--font-serif);
}

.preparation > p {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.preparation-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.preparation-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 18px;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  font-size: 14px;
  line-height: 1.7;
}

.preparation-list li::before {
  content: "□";
  color: var(--color-brand);
  font-size: 15px;
  flex-shrink: 0;
  line-height: 1.4;
}

/* FAQ 引导入口 */
.link-faq {
  margin-bottom: 48px;
}

.link-faq h2 {
  font-size: 20px;
  margin-bottom: 12px;
  font-family: var(--font-serif);
}

.link-faq > p {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.link-faq-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.link-faq-item {
  display: block;
  padding: 16px 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  transition: border-color var(--transition), color var(--transition);
}

.link-faq-item:hover {
  border-color: var(--color-brand);
  color: var(--color-brand-dark);
}

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

.error-section {
  text-align: center;
  max-width: 520px;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
}

.error-code {
  font-family: var(--font-serif);
  font-size: 64px;
  font-weight: 700;
  color: var(--color-brand);
  line-height: 1;
  margin-bottom: 16px;
}

.error-section h1 {
  font-size: 24px;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 24px;
}

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

.btn-home,
.btn-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  min-height: 44px;
  transition: background-color var(--transition), border-color var(--transition), color var(--transition);
}

.btn-home {
  background-color: var(--color-brand);
  color: var(--color-white);
  border: 1px solid var(--color-brand);
}

.btn-home:hover {
  background-color: var(--color-brand-dark);
  border-color: var(--color-brand-dark);
  color: var(--color-white);
}

.btn-link {
  background-color: var(--color-white);
  color: var(--color-text);
  border: 1px solid var(--color-line);
}

.btn-link:hover {
  border-color: var(--color-brand);
  color: var(--color-brand-dark);
}

/* ============================================================
   RESPONSIVE — 响应式断点
   ============================================================ */

/* ---- 1024px 以下 ---- */
@media (max-width: 1024px) {
  .header-inner {
    padding: 0 20px;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    padding: 40px 20px 28px;
  }

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

  /* 侧栏布局降级 */
  .layout-shell,
  .layout-shell.sidebar-left {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 24px;
  }

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

/* ---- 768px 以下：移动端 ---- */
@media (max-width: 768px) {
  .header-inner {
    height: 60px;
    padding: 0 16px;
    gap: 12px;
  }

  .brand-text {
    font-size: 17px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-line);
    box-shadow: 0 4px 12px rgba(43, 42, 39, 0.08);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .site-nav:has(.nav-list.is-open) {
    max-height: 480px;
    overflow-y: auto;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    gap: 0;
    display: none;
  }

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

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

  .nav-item:last-child {
    border-bottom: none;
  }

  .nav-link {
    padding: 14px 12px;
    font-size: 15px;
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .nav-link.is-current::after {
    left: 12px;
    right: auto;
    width: 3px;
    height: 20px;
    top: 50%;
    transform: translateY(-50%);
    border-radius: 2px;
  }

  .nav-link.is-current {
    background-color: rgba(109, 139, 133, 0.08);
  }

  /* 内容容器 */
  .home-main,
  .inner-main {
    padding: 24px 16px 48px;
  }

  .page-header {
    margin-bottom: 24px;
    padding-bottom: 16px;
  }

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

  .page-description {
    font-size: 15px;
  }

  /* 面包屑 */
  .breadcrumb {
    margin-bottom: 16px;
    font-size: 13px;
  }

  /* ---- Hero ---- */
  .hero-section {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 24px 0 32px;
  }

  .hero-figure img {
    aspect-ratio: 16 / 10;
  }

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

  .hero-action-link {
    padding: 14px 16px;
    min-height: 48px;
  }

  /* ---- 首页各模块 ---- */
  .service-positioning,
  .ip-timeline,
  .service-summary,
  .process-preview,
  .faq-preview,
  .announcements,
  .boundary-notice {
    padding: 32px 0;
  }

  .service-list {
    grid-template-columns: 1fr;
  }

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

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

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

  /* ---- 侧栏布局：移动端全部单列 ---- */
  .layout-shell,
  .layout-shell.sidebar-left {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .layout-shell.sidebar-left .page-aside,
  .layout-shell.sidebar-left .faq-topics-aside,
  .layout-shell.sidebar-left .inner-main,
  .layout-shell.sidebar-left .faq-content {
    grid-column: 1;
    grid-row: auto;
  }

  /* 品牌页：移动端 H1 在前，侧栏在后 */
  .sidebar-left .page-aside,
  .sidebar-left .faq-topics-aside {
    order: 2;
    margin-top: 32px;
    position: static;
  }

  .sidebar-left .inner-main,
  .sidebar-left .faq-content {
    order: 1;
  }

  /* 指南页：移动端主内容在前，目录在后 */
  .layout-shell .layout-aside {
    order: 2;
    margin-top: 32px;
    position: static;
  }

  .layout-shell .layout-main {
    order: 1;
  }

  /* 侧栏内部 */
  .toc-box,
  .aside-inner,
  .aside-toc {
    padding: 16px 20px;
  }

  .toc-list,
  .topic-list,
  .aside-toc-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px;
  }

  .toc-item a,
  .topic-item a,
  .aside-toc-item a {
    padding: 8px 14px;
    font-size: 13px;
    background-color: rgba(109, 139, 133, 0.06);
    border-radius: 999px;
    white-space: nowrap;
  }

  .toc-title,
  .aside-title,
  .aside-toc-title {
    margin-bottom: 12px;
  }

  .aside-contact {
    margin-top: 16px;
  }

  /* ---- 品牌页 ---- */
  .card-grid {
    grid-template-columns: 1fr;
  }

  .timeline-wrap {
    padding-left: 20px;
  }

  .timeline-item .timeline-marker {
    left: -20px;
  }

  /* ---- 服务页 ---- */
  .service-item-body {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 16px 20px;
  }

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

  /* ---- 流程页 ---- */
  .process-timeline::before {
    left: 15px;
  }

  .timeline-step {
    padding-left: 48px;
  }

  .timeline-step .timeline-marker {
    width: 30px;
    height: 30px;
    font-size: 13px;
  }

  .preparation-list {
    grid-template-columns: 1fr;
  }

  /* ---- FAQ 页 ---- */
  .faq-group {
    margin-bottom: 32px;
  }

  .faq-group-title {
    font-size: 18px;
  }

  /* ---- 指南页 ---- */
  .guide-section {
    margin-bottom: 32px;
  }

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

  .guide-block {
    padding: 16px 20px;
  }

  /* ---- 咨询页 ---- */
  .step-item {
    grid-template-columns: 40px 1fr;
    gap: 16px;
    padding: 16px 20px;
  }

  .step-number {
    width: 38px;
    height: 38px;
    font-size: 16px;
  }

  .link-faq-list {
    grid-template-columns: 1fr;
  }

  .link-band,
  .related-list {
    grid-template-columns: 1fr;
  }

  .related-links-list {
    flex-direction: column;
    align-items: stretch;
  }

  .related-link {
    justify-content: center;
  }

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

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

  .footer-bottom {
    padding: 16px;
  }

  /* ---- 404 ---- */
  .error-main {
    padding: 48px 16px;
  }

  .error-section {
    padding: 32px 24px;
  }

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

/* ---- 480px 以下：小屏手机 ---- */
@media (max-width: 480px) {
  .hero-actions {
    grid-template-columns: 1fr;
  }

  .hero-announcements .announcement-mini-list li {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
  }

  .announcement-content a {
    font-size: 14px;
  }

  .footer-nav-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 4px 16px;
  }

  .footer-nav-list li {
    margin-bottom: 0;
  }
}

/* ---- 滚动出现动画（增强，不影响初始可见性） ---- */
@media (prefers-reduced-motion: no-preference) {
  .timeline-card,
  .service-item,
  .process-step,
  .ip-card,
  .guide-block {
    transition: border-color var(--transition), box-shadow var(--transition), transform 0.3s ease;
  }
}

/* 程序验收反馈：移动端正文优先 */
@media (max-width: 768px) {
  .site-main :is(.page-content, .main-content, .content-main) {
    order: 1;
  }

  .site-main :is(aside, .sidebar) {
    order: 2;
  }
}