/* ============================================================
   base —— 全局基础
   ============================================================ */
:root {
  --color-bg: #f5f1e8;
  --color-ink: #2b2a28;
  --color-gray: #6b675e;
  --color-accent: #a3362a;
  --color-card: #ffffff;
  --color-line: #e5e0d5;
  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --container-width: 1120px;
  --radius: 6px;
  --shadow: 0 1px 3px rgba(43, 42, 40, 0.08);
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-ink);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

ul,
ol {
  list-style: none;
}

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

h1 {
  font-size: 32px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 18px;
}

h4 {
  font-size: 15px;
  font-weight: 600;
}

p {
  margin-bottom: 0.5em;
}

/* ============================================================
   layout —— 全站骨架
   ============================================================ */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-shrink: 0;
}

.brand-name {
  font-family: var(--font-sans);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-ink);
  letter-spacing: 0.02em;
}

.brand-tag {
  font-size: 12px;
  color: var(--color-gray);
  border-left: 2px solid var(--color-accent);
  padding-left: 8px;
  line-height: 1.4;
}

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

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  width: 44px;
  height: 44px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.nav-toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-ink);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

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

.nav-list li a {
  display: block;
  padding: 8px 14px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-gray);
  border-radius: var(--radius);
  border-bottom: 2px solid transparent;
}

.nav-list li a:hover {
  color: var(--color-ink);
  background: rgba(163, 54, 42, 0.05);
}

.nav-list li a.is-current {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
  font-weight: 600;
}

.header-cta {
  display: inline-block;
  padding: 10px 20px;
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius);
  flex-shrink: 0;
  transition: background 0.2s ease;
}

.header-cta:hover {
  background: #8a2e24;
  color: #fff;
}

.archive-status {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 8px 24px;
  display: flex;
  gap: 24px;
  font-size: 12px;
  color: var(--color-gray);
  border-top: 1px solid var(--color-line);
  background: var(--color-bg);
}

.archive-status span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.archive-status span::before {
  content: "";
  width: 4px;
  height: 4px;
  background: var(--color-accent);
  border-radius: 50%;
  flex-shrink: 0;
}

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

.home-main {
  padding-top: 0;
  padding-bottom: 60px;
}

.inner-main {
  padding-top: 32px;
  padding-bottom: 60px;
}

.site-footer {
  background: var(--color-ink);
  color: rgba(255, 255, 255, 0.85);
  padding: 48px 24px 24px;
  margin-top: auto;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1fr;
  gap: 40px;
  max-width: 100%;
}

.footer-group h3 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 14px;
  font-weight: 600;
}

.footer-group p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.8;
}

.footer-nav ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-nav a {
  color: rgba(255, 255, 255, 0.75);
  font-size: 13px;
  font-family: var(--font-sans);
}

.footer-nav a:hover {
  color: #fff;
}

.footer-boundary p {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.55);
  border-left: 2px solid var(--color-accent);
  padding-left: 12px;
}

.footer-meta {
  grid-column: 1 / -1;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 16px;
  text-align: center;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
}

/* 顶部提示条 */
.top-tip,
.top-notice,
.top-strip,
.top-ribbon {
  background: var(--color-ink);
  color: rgba(255, 255, 255, 0.85);
  text-align: center;
  padding: 8px 16px;
  font-size: 13px;
  font-family: var(--font-sans);
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-gray);
  margin-bottom: 24px;
  font-family: var(--font-sans);
}

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

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

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

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

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

.page-description {
  font-size: 13px;
  color: var(--color-accent);
  font-family: var(--font-sans);
  margin-bottom: 8px;
  letter-spacing: 0.08em;
}

.page-title {
  font-size: 28px;
  color: var(--color-ink);
  margin-bottom: 12px;
}

.page-intro,
.page-subtitle,
.page-header-desc {
  font-size: 15px;
  color: var(--color-gray);
  max-width: 720px;
}

.page-index {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--color-accent);
  display: block;
  margin-bottom: 8px;
  letter-spacing: 0.1em;
}

/* 通用 section 标题 */
.section-title {
  font-size: 22px;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-line);
  position: relative;
}

.section-title::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 48px;
  height: 2px;
  background: var(--color-accent);
}

/* 相关链接 */
.related-links {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-line);
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.related-links-label {
  font-size: 13px;
  color: var(--color-gray);
  font-family: var(--font-sans);
}

.related-links-item {
  font-size: 14px;
  color: var(--color-accent);
  font-family: var(--font-sans);
  border: 1px solid var(--color-line);
  padding: 6px 14px;
  border-radius: var(--radius);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.related-links-item:hover {
  border-color: var(--color-accent);
  background: rgba(163, 54, 42, 0.04);
}

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

/* 折叠问答 */
.faq-item {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-card);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 20px;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  list-style: none;
  position: relative;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  color: var(--color-accent);
  flex-shrink: 0;
  font-weight: 400;
  transition: transform 0.2s ease;
}

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

.faq-item[open] summary {
  border-bottom: 1px solid var(--color-line);
}

.faq-answer {
  padding: 16px 20px;
  font-size: 14px;
  color: var(--color-gray);
}

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

.faq-answer a {
  color: var(--color-accent);
  font-family: var(--font-sans);
}

/* 图片容器 */
figure {
  margin: 0;
}

figcaption {
  font-size: 12px;
  color: var(--color-gray);
  padding: 8px 0 0;
  font-family: var(--font-sans);
  text-align: center;
}

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

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

/* 首屏档案区 */
.hero-archive {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  padding: 56px 0 48px;
  border-bottom: 1px solid var(--color-line);
}

.hero-copy h1 {
  font-size: 32px;
  line-height: 1.3;
  margin-bottom: 20px;
  font-weight: 700;
}

.hero-lead {
  font-size: 16px;
  color: var(--color-gray);
  margin-bottom: 28px;
  max-width: 440px;
}

.hero-action {
  display: inline-block;
  padding: 12px 28px;
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius);
  transition: background 0.2s ease;
}

.hero-action:hover {
  background: #8a2e24;
  color: #fff;
}

.hero-browse {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.hero-media {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-card);
  padding: 8px;
}

.hero-media img {
  border-radius: 4px;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.browse-dimensions h2 {
  font-size: 18px;
  margin-bottom: 12px;
  color: var(--color-ink);
}

.browse-dimensions ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.browse-dimensions li a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-ink);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.browse-dimensions li a::before {
  content: "→";
  color: var(--color-accent);
  font-size: 14px;
}

.browse-dimensions li a:hover {
  border-color: var(--color-accent);
  background: rgba(163, 54, 42, 0.03);
}

.content-media-primary {
  grid-column: 1 / -1;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 12px;
  background: var(--color-card);
}

.content-media-primary img {
  aspect-ratio: 21 / 9;
  object-fit: cover;
  border-radius: 4px;
}

.content-media-primary figcaption {
  padding-top: 10px;
}

/* 服务档案索引 */
.archive-index {
  padding: 56px 0;
  border-bottom: 1px solid var(--color-line);
}

.section-head {
  margin-bottom: 32px;
}

.section-head h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

.section-head p {
  color: var(--color-gray);
  font-size: 14px;
}

.year-groups {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.year-group {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
}

.year-group h3 {
  font-size: 20px;
  color: var(--color-accent);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-line);
  font-weight: 700;
}

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

.topic-item {
  display: grid;
  grid-template-columns: 48px 1fr;
  grid-template-rows: auto auto;
  column-gap: 12px;
  padding: 12px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.topic-item:hover {
  border-color: var(--color-accent);
  background: rgba(163, 54, 42, 0.02);
}

.topic-code {
  grid-row: 1 / 3;
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--color-accent);
  background: rgba(163, 54, 42, 0.06);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
}

.topic-name {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
}

.topic-summary {
  font-size: 13px;
  color: var(--color-gray);
  line-height: 1.5;
}

/* 核心服务条目 */
.core-services {
  padding: 56px 0;
  border-bottom: 1px solid var(--color-line);
}

.core-services > h2 {
  font-size: 24px;
  margin-bottom: 32px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-line);
  position: relative;
}

.core-services > h2::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 48px;
  height: 2px;
  background: var(--color-accent);
}

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

.service-entry {
  display: grid;
  grid-template-columns: 56px 160px 1fr auto;
  align-items: center;
  gap: 24px;
  padding: 20px 24px;
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.service-entry:hover {
  border-color: var(--color-accent);
  background: rgba(163, 54, 42, 0.02);
}

.entry-index {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--color-gray);
  background: var(--color-bg);
  border-radius: 4px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
}

.service-entry h3 {
  font-size: 18px;
  color: var(--color-ink);
}

.service-entry p {
  font-size: 14px;
  color: var(--color-gray);
  margin: 0;
}

.service-entry a {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-accent);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.service-entry a::after {
  content: "→";
  transition: transform 0.2s ease;
}

.service-entry a:hover::after {
  transform: translateX(4px);
}

/* 工作方式预览 */
.method-preview {
  padding: 56px 0;
  border-bottom: 1px solid var(--color-line);
}

.method-preview > h2 {
  font-size: 24px;
  margin-bottom: 32px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-line);
  position: relative;
}

.method-preview > h2::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 48px;
  height: 2px;
  background: var(--color-accent);
}

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

.step {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
}

.step-num {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--color-accent);
  background: rgba(163, 54, 42, 0.06);
  border-radius: 4px;
  padding: 4px 10px;
  margin-bottom: 14px;
  font-weight: 600;
}

.step h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.step p {
  font-size: 13px;
  color: var(--color-gray);
  margin: 0;
  line-height: 1.6;
}

.more-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-accent);
  font-weight: 600;
}

.more-link::after {
  content: "→";
}

/* 质量标准摘要 */
.standard-summary {
  padding: 56px 0;
  border-bottom: 1px solid var(--color-line);
}

.standard-summary > h2 {
  font-size: 24px;
  margin-bottom: 32px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-line);
  position: relative;
}

.standard-summary > h2::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 48px;
  height: 2px;
  background: var(--color-accent);
}

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

.std-card {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.2s ease;
}

.std-card:hover {
  border-color: var(--color-accent);
}

.std-card h3 {
  font-size: 16px;
  margin-bottom: 10px;
  color: var(--color-ink);
}

.std-card p {
  font-size: 13px;
  color: var(--color-gray);
  margin-bottom: 14px;
  line-height: 1.6;
}

.std-card a {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.std-card a::after {
  content: "→";
}

/* 常见问题提点 */
.faq-teaser {
  padding: 56px 0;
  border-bottom: 1px solid var(--color-line);
}

.faq-teaser > h2 {
  font-size: 24px;
  margin-bottom: 32px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-line);
  position: relative;
}

.faq-teaser > h2::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 48px;
  height: 2px;
  background: var(--color-accent);
}

.faq-teaser .faq-item {
  max-width: 800px;
}

/* 合作入口条幅 */
.cooperation-banner {
  padding: 56px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.banner-copy h2 {
  font-size: 24px;
  margin-bottom: 10px;
}

.banner-copy p {
  color: var(--color-gray);
  font-size: 14px;
  max-width: 560px;
}

.banner-action {
  display: inline-block;
  padding: 12px 28px;
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius);
  flex-shrink: 0;
}

.banner-action:hover {
  background: #8a2e24;
  color: #fff;
}

/* ============================================================
   pages —— 服务目录（mrhl/service.html）
   ============================================================ */

/* 服务分组索引 */
.service-index {
  margin-bottom: 48px;
}

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

.index-card {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.index-card:hover {
  border-color: var(--color-accent);
}

.index-card h3 {
  font-size: 17px;
  margin-bottom: 10px;
  color: var(--color-ink);
}

.index-card p {
  font-size: 13px;
  color: var(--color-gray);
  margin-bottom: 14px;
  line-height: 1.6;
}

.index-card a {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.index-card a::after {
  content: "→";
}

/* 双栏布局 */
.layout-shell.sidebar-right {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
  align-items: start;
}

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

/* 服务分组 */
.service-groups {
  margin-bottom: 48px;
}

.service-group {
  margin-bottom: 40px;
  padding: 28px;
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.service-group > h3 {
  font-size: 20px;
  color: var(--color-accent);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-line);
}

.service-item {
  padding: 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  margin-bottom: 16px;
  background: var(--color-bg);
}

.service-item:last-child {
  margin-bottom: 0;
}

.service-item h4 {
  font-size: 16px;
  margin-bottom: 10px;
  color: var(--color-ink);
}

.service-item p {
  font-size: 14px;
  color: var(--color-gray);
  margin-bottom: 6px;
  line-height: 1.7;
}

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

/* 服务流程链接 */
.service-process-link {
  margin-bottom: 48px;
  padding: 24px;
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.service-process-link p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.8;
}

.service-process-link a {
  color: var(--color-accent);
  font-family: var(--font-sans);
  font-weight: 600;
}

/* 侧栏 */
.sidebar {
  min-width: 0;
}

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

.sidebar-block h3 {
  font-size: 15px;
  color: var(--color-ink);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
}

.sidebar-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-links li a {
  display: block;
  padding: 8px 10px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-gray);
  border-radius: 4px;
  transition: background 0.2s ease, color 0.2s ease;
}

.sidebar-links li a:hover {
  background: rgba(163, 54, 42, 0.05);
  color: var(--color-accent);
}

.sidebar-figure {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 8px;
  background: var(--color-card);
}

.sidebar-figure img {
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 4px;
}

.sidebar-figure figcaption {
  font-size: 12px;
  padding-top: 8px;
}

/* 服务边界 */
.service-boundary {
  margin-top: 48px;
  padding: 24px;
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.service-boundary p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.8;
}

.service-boundary a {
  color: var(--color-accent);
  font-family: var(--font-sans);
  font-weight: 600;
}

/* ============================================================
   pages —— 工作方式（mrhl/method.html）
   ============================================================ */

/* 流程总览 */
.method-overview {
  margin-bottom: 48px;
}

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

.overview-step {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
  position: relative;
}

.step-number {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--color-accent);
  background: rgba(163, 54, 42, 0.06);
  border-radius: 4px;
  padding: 4px 10px;
  margin-bottom: 12px;
  font-weight: 600;
}

.overview-step h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.overview-step p {
  font-size: 13px;
  color: var(--color-gray);
  margin: 0;
  line-height: 1.6;
}

/* 流程详情 */
.method-details {
  margin-bottom: 48px;
}

.method-block {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  margin-bottom: 24px;
  overflow: hidden;
}

.method-block-head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px 24px;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
}

.block-number {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-accent);
  background: rgba(163, 54, 42, 0.08);
  border-radius: 4px;
  padding: 4px 12px;
  font-weight: 700;
}

.method-block-head h3 {
  font-size: 19px;
  color: var(--color-ink);
  margin: 0;
}

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

.method-row {
  padding: 16px;
  background: var(--color-bg);
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
}

.method-row h4 {
  font-size: 14px;
  color: var(--color-accent);
  margin-bottom: 8px;
  font-family: var(--font-sans);
}

.method-row p {
  font-size: 14px;
  color: var(--color-gray);
  margin: 0;
  line-height: 1.7;
}

/* 客户配合清单 */
.client-checklist {
  margin-bottom: 48px;
}

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

.checklist-list li {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
}

.checklist-list li h3 {
  font-size: 15px;
  color: var(--color-accent);
  margin-bottom: 8px;
  font-family: var(--font-sans);
  display: flex;
  align-items: center;
  gap: 8px;
}

.checklist-list li h3::before {
  content: "□";
  font-size: 16px;
  color: var(--color-accent);
}

.checklist-list li p {
  font-size: 14px;
  color: var(--color-gray);
  margin: 0;
  line-height: 1.7;
}

.checklist-note {
  margin-top: 24px;
  padding: 16px 20px;
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--color-gray);
}

.checklist-note a {
  color: var(--color-accent);
  font-family: var(--font-sans);
  font-weight: 600;
}

/* 方法链接卡片 */
.method-links {
  margin-bottom: 48px;
}

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

.link-card {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
  transition: border-color 0.2s ease;
}

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

.link-card h3 {
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--color-ink);
}

.link-card p {
  font-size: 13px;
  color: var(--color-gray);
  margin: 0;
  line-height: 1.6;
}

/* 方法页图片 */
.method-media {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 8px;
  background: var(--color-card);
}

.method-media img {
  aspect-ratio: 21 / 9;
  object-fit: cover;
  border-radius: 4px;
}

/* ============================================================
   pages —— 质量标准（mrhl/standard.html）
   ============================================================ */

/* 双栏布局 */
.page-layout.sidebar-left {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 48px;
  align-items: start;
}

.sidebar-left-aside {
  position: sticky;
  top: 140px;
}

.aside-inner {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
}

.aside-inner h2 {
  font-size: 16px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
}

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

.anchor-list li a {
  display: block;
  padding: 8px 12px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-gray);
  border-left: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.anchor-list li a:hover {
  color: var(--color-accent);
  border-left-color: var(--color-accent);
  background: rgba(163, 54, 42, 0.04);
}

.aside-note {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--color-line);
  font-size: 12px;
  color: var(--color-gray);
  line-height: 1.6;
}

.sidebar-left-main {
  min-width: 0;
}

/* 标准条目 */
.standard-section {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 32px;
}

.section-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.section-no {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-accent);
  background: rgba(163, 54, 42, 0.08);
  border-radius: 4px;
  padding: 4px 12px;
  font-weight: 700;
  flex-shrink: 0;
}

.section-head h2 {
  font-size: 20px;
  color: var(--color-ink);
  margin: 0;
}

.section-intro {
  font-size: 14px;
  color: var(--color-gray);
  margin-bottom: 20px;
  line-height: 1.8;
}

/* 来源分级表格 */
.standard-table {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 16px;
}

.table-row {
  display: grid;
  grid-template-columns: 80px 1fr 1fr;
  border-bottom: 1px solid var(--color-line);
}

.table-row:last-child {
  border-bottom: none;
}

.table-head {
  background: var(--color-bg);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-ink);
}

.row-level,
.row-desc,
.row-example {
  padding: 14px 16px;
  font-size: 13px;
  line-height: 1.6;
}

.row-level {
  font-family: var(--font-sans);
  font-weight: 700;
  color: var(--color-accent);
  border-right: 1px solid var(--color-line);
}

.row-desc {
  border-right: 1px solid var(--color-line);
  color: var(--color-ink);
}

.row-example {
  color: var(--color-gray);
}

/* 标准列表 */
.standard-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 16px;
}

.standard-list li {
  padding: 14px 16px;
  background: var(--color-bg);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.7;
}

.standard-list li strong {
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-weight: 600;
}

/* 标准页图片 */
.standard-figure {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 8px;
  margin-bottom: 16px;
}

.standard-figure img {
  aspect-ratio: 16 / 7;
  object-fit: cover;
  border-radius: 4px;
}

/* 复核流程 */
.review-steps {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 16px;
}

.review-steps li {
  padding: 14px 16px;
  background: var(--color-bg);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.7;
  display: flex;
  gap: 12px;
}

.review-steps li strong {
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-weight: 600;
  flex-shrink: 0;
}

.section-footnote {
  font-size: 13px;
  color: var(--color-gray);
  padding: 12px 16px;
  background: rgba(163, 54, 42, 0.04);
  border-radius: var(--radius);
  line-height: 1.6;
}

/* 内页链接 */
.inner-links {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px 24px;
}

.inner-links p {
  font-size: 14px;
  color: var(--color-gray);
  margin-bottom: 12px;
}

.inner-links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.inner-links ul li a {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--color-accent);
  border: 1px solid var(--color-line);
  padding: 6px 14px;
  border-radius: var(--radius);
  display: inline-block;
  transition: border-color 0.2s ease;
}

.inner-links ul li a:hover {
  border-color: var(--color-accent);
}

/* ============================================================
   pages —— 常见问题（mrhl/faq.html）
   ============================================================ */

/* 问题分组索引 */
.faq-topic-index {
  margin-bottom: 40px;
}

.topic-tag-list {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.topic-tag {
  display: inline-block;
  padding: 10px 20px;
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-gray);
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.topic-tag:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: rgba(163, 54, 42, 0.03);
}

/* 问答分组 */
.faq-group {
  margin-bottom: 40px;
}

.faq-group-title {
  font-size: 19px;
  color: var(--color-accent);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-line);
}

.faq-group .faq-item {
  max-width: 100%;
}

/* FAQ 页图片 */
.faq-media {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 8px;
  background: var(--color-card);
  margin-bottom: 40px;
}

.faq-media img {
  aspect-ratio: 21 / 9;
  object-fit: cover;
  border-radius: 4px;
}

/* 合作入口条 */
.faq-cta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px;
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.cta-text h2 {
  font-size: 20px;
  margin-bottom: 8px;
}

.cta-text p {
  font-size: 14px;
  color: var(--color-gray);
  margin: 0;
}

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

.cta-link {
  display: inline-block;
  padding: 10px 22px;
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius);
  transition: background 0.2s ease;
}

.cta-link:hover {
  background: #8a2e24;
  color: #fff;
}

.cta-link.cta-link-secondary {
  background: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}

.cta-link.cta-link-secondary:hover {
  background: rgba(163, 54, 42, 0.05);
  color: var(--color-accent);
}

/* ============================================================
   pages —— 合作与反馈（mrhl/contact.html）
   ============================================================ */

.layout-shell.sidebar-right .main-column {
  min-width: 0;
}

.content-block {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 32px;
}

.content-block h2 {
  font-size: 20px;
  color: var(--color-ink);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-line);
}

.block-content p {
  font-size: 14px;
  color: var(--color-gray);
  margin-bottom: 12px;
  line-height: 1.8;
}

.block-content a {
  color: var(--color-accent);
  font-family: var(--font-sans);
  font-weight: 600;
}

.media-figure {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 8px;
  margin-top: 16px;
}

.media-figure img {
  aspect-ratio: 16 / 8;
  object-fit: cover;
  border-radius: 4px;
}

/* 侧栏 */
.side-column {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
}

.side-column h2 {
  font-size: 17px;
  color: var(--color-ink);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
}

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

.preparation-list li {
  padding: 12px 14px;
  background: var(--color-bg);
  border-radius: var(--radius);
  border-left: 3px solid var(--color-accent);
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

.preparation-list li strong {
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-weight: 600;
  display: block;
  margin-bottom: 4px;
}

.side-note {
  margin-top: 16px;
  padding: 12px 14px;
  background: rgba(163, 54, 42, 0.04);
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--color-gray);
  line-height: 1.6;
}

.side-link {
  margin-top: 12px;
  font-size: 14px;
}

.side-link a {
  color: var(--color-accent);
  font-family: var(--font-sans);
  font-weight: 600;
}

/* ============================================================
   pages —— 404
   ============================================================ */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 60px 24px;
}

.error-block {
  text-align: center;
  max-width: 520px;
}

.error-code {
  font-family: var(--font-sans);
  font-size: 72px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 16px;
}

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

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

.error-link {
  display: inline-block;
  padding: 10px 24px;
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius);
}

.error-link:hover {
  background: #8a2e24;
  color: #fff;
}

/* ============================================================
   responsive —— 响应式
   ============================================================ */
@media (max-width: 1024px) {
  .hero-archive {
    gap: 32px;
  }

  .service-entry {
    grid-template-columns: 56px 140px 1fr auto;
    gap: 16px;
    padding: 16px 20px;
  }

  .method-steps {
    gap: 16px;
  }

  .overview-steps {
    gap: 16px;
  }

  .page-layout.sidebar-left {
    grid-template-columns: 220px 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .header-inner {
    padding: 12px 16px;
    flex-wrap: wrap;
    gap: 12px;
  }

  .nav-toggle {
    display: flex;
    margin-left: auto;
    order: 3;
  }

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

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

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

  .nav-list {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-card);
    border-bottom: 1px solid var(--color-line);
    flex-direction: column;
    padding: 8px 16px 16px;
    gap: 0;
    box-shadow: 0 8px 16px rgba(43, 42, 40, 0.08);
  }

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

  .nav-list li a {
    padding: 12px 8px;
    border-bottom: 1px solid var(--color-line);
    border-radius: 0;
  }

  .nav-list li:last-child a {
    border-bottom: none;
  }

  .nav-list li a.is-current {
    border-bottom-color: var(--color-line);
  }

  .header-cta {
    display: none;
  }

  .archive-status {
    padding: 8px 16px;
    gap: 12px;
    flex-wrap: wrap;
  }

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

  .inner-main {
    padding-top: 24px;
    padding-bottom: 40px;
  }

  /* 首页 */
  .hero-archive {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 0 32px;
  }

  .hero-copy h1 {
    font-size: 26px;
  }

  .hero-lead {
    font-size: 15px;
  }

  .year-groups {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .service-entry {
    grid-template-columns: 44px 1fr auto;
    grid-template-rows: auto auto;
    gap: 8px 14px;
    padding: 16px;
  }

  .entry-index {
    grid-row: 1 / 3;
    width: 40px;
    height: 40px;
  }

  .service-entry h3 {
    grid-column: 2;
    font-size: 16px;
  }

  .service-entry p {
    grid-column: 2;
    font-size: 13px;
  }

  .service-entry a {
    grid-column: 3;
    grid-row: 1 / 3;
  }

  .method-steps {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .standard-cards {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .cooperation-banner {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }

  /* 服务页 */
  .index-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .layout-shell.sidebar-right {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .service-item {
    padding: 16px;
  }

  .sidebar {
    order: 2;
  }

  /* 工作方式页 */
  .overview-steps {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .method-block-body {
    grid-template-columns: 1fr;
    gap: 12px;
  }

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

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

  /* 标准页 */
  .page-layout.sidebar-left {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .sidebar-left-aside {
    position: static;
    order: 2;
  }

  .sidebar-left-main {
    order: 1;
  }

  .standard-section {
    padding: 20px;
  }

  .table-row {
    grid-template-columns: 60px 1fr;
  }

  .row-example {
    grid-column: 1 / 3;
    border-top: 1px solid var(--color-line);
    border-right: none;
  }

  .table-head .row-example {
    display: none;
  }

  /* FAQ 页 */
  .topic-tag-list {
    gap: 8px;
  }

  .topic-tag {
    padding: 8px 16px;
    font-size: 13px;
  }

  .faq-cta-bar {
    flex-direction: column;
    align-items: flex-start;
    padding: 20px;
  }

  /* 联系页 */
  .content-block {
    padding: 20px;
  }

  .side-column {
    order: 2;
  }

  /* 页脚 */
  .site-footer {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 16px 20px;
  }

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

@media (max-width: 480px) {
  .brand-tag {
    display: none;
  }

  .brand-name {
    font-size: 20px;
  }

  .archive-status {
    font-size: 11px;
  }

  .hero-archive {
    padding: 32px 0 24px;
  }

  .hero-copy h1 {
    font-size: 24px;
  }

  .hero-action {
    width: 100%;
    text-align: center;
  }

  .browse-dimensions li a {
    font-size: 13px;
    padding: 10px 12px;
  }

  .method-steps {
    grid-template-columns: 1fr;
  }

  .overview-steps {
    grid-template-columns: 1fr;
  }

  .service-entry {
    grid-template-columns: 40px 1fr;
  }

  .service-entry a {
    grid-column: 2;
    grid-row: auto;
    margin-top: 4px;
  }

  .year-group {
    padding: 16px;
  }

  .topic-item {
    grid-template-columns: 40px 1fr;
  }

  .standard-table .table-row {
    grid-template-columns: 1fr;
  }

  .row-level {
    border-right: none;
    border-bottom: 1px solid var(--color-line);
  }

  .row-desc {
    border-right: none;
    border-bottom: 1px solid var(--color-line);
  }

  .row-example {
    grid-column: 1;
  }

  .table-head {
    display: none;
  }

  .method-block-head {
    padding: 16px;
    flex-wrap: wrap;
  }

  .method-block-body {
    padding: 16px;
  }

  .method-row {
    padding: 12px;
  }

  .checklist-list li {
    padding: 16px;
  }

  .standard-section {
    padding: 16px;
  }

  .review-steps li {
    flex-direction: column;
    gap: 4px;
  }

  .faq-item summary {
    padding: 14px 16px;
    font-size: 14px;
  }

  .faq-answer {
    padding: 14px 16px;
  }

  .cta-links {
    width: 100%;
  }

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

  .content-block {
    padding: 16px;
  }

  .preparation-list li {
    padding: 10px 12px;
  }

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

  .section-title {
    font-size: 19px;
  }

  .related-links {
    gap: 8px;
  }

  .related-links-item {
    padding: 6px 10px;
    font-size: 13px;
  }
}