/* ==========================================================================
   黑料不打烊 · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. base — 变量、重置、排版基底
   -------------------------------------------------------------------------- */
:root {
  --ink: #23211C;
  --ink-soft: #4A463C;
  --green: #1E3A2B;
  --green-moss: #4C6B4F;
  --wheat: #D8A73C;
  --paper: #F7F4EA;
  --paper-grey: #E5E0D2;
  --paper-deep: #EFEADA;
  --brick: #A9502F;
  --line: #D6D0BF;
  --line-strong: #B9B2A0;

  --font-serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "Menlo", "Consolas", monospace;

  --w-page: 1160px;
  --w-prose: 720px;
  --w-wide: 920px;
  --w-aside: 300px;
  --gap-col: 40px;
  --radius: 3px;
  --radius-sm: 2px;

  --space-section: 56px;
  --header-h: 72px;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--green);
  line-height: 1.4;
}

p {
  margin: 0;
}

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

dl,
dd,
dt {
  margin: 0;
}

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

a:hover,
a:focus-visible {
  color: var(--green-moss);
}

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

figure {
  margin: 0;
}

table {
  border-collapse: collapse;
  width: 100%;
}

caption {
  text-align: left;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--green-moss);
  outline-offset: 3px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 60;
  padding: 10px 18px;
  background: var(--green);
  color: var(--paper);
  font-size: 14px;
  border-radius: var(--radius-sm);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 12px;
  color: var(--paper);
}

/* --------------------------------------------------------------------------
   2. layout — 页头、导航、主容器、面包屑、页标题、页脚
   -------------------------------------------------------------------------- */

/* 2.1 页头 */
.site-header {
  position: relative;
  z-index: 40;
  background: var(--paper);
  border-bottom: 1px solid var(--green);
}

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

.brand-mark {
  font-family: var(--font-serif);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--green);
  white-space: nowrap;
  flex: 0 0 auto;
}

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

/* 2.2 主导航 */
.primary-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: flex-end;
}

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

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 6px 12px;
  font-size: 15px;
  color: var(--ink-soft);
  border-radius: var(--radius-sm);
  transition: color 0.18s ease, background-color 0.18s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--green);
  background: var(--paper-grey);
}

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

.nav-link-cta {
  background: var(--wheat);
  color: var(--green);
  font-weight: 600;
  padding: 6px 14px;
}

.nav-link-cta:hover,
.nav-link-cta:focus-visible {
  background: #C9982F;
  color: var(--green);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--paper);
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--green);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.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);
}

/* 2.3 主容器 */
.site-main {
  display: block;
}

.inner-main {
  max-width: var(--w-page);
  margin: 0 auto;
  padding: 28px 24px 72px;
}

/* 2.4 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-soft);
  margin-bottom: 18px;
}

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

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--green);
  text-decoration: underline;
}

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

.breadcrumb-current {
  color: var(--green);
  font-weight: 600;
}

/* 2.5 页面标题区（全站统一骨架） */
.page-header {
  margin-bottom: 20px;
}

.page-title {
  font-family: var(--font-serif);
  font-size: 40px;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.01em;
  color: var(--green);
  margin: 0;
}

.page-lead {
  max-width: var(--w-prose);
  font-size: 18px;
  line-height: 1.7;
  color: var(--green-moss);
}

.page-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.page-tag {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  line-height: 1.6;
  padding: 3px 10px;
  color: var(--green);
  background: var(--paper-grey);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.tag-mono {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  padding: 3px 10px;
  margin-right: 8px;
  color: var(--green);
  background: var(--paper-grey);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

/* 2.6 页脚 */
.site-footer {
  background: var(--paper-deep);
  border-top: 1px solid var(--green);
  color: var(--ink);
}

.footer-inner {
  max-width: var(--w-page);
  margin: 0 auto;
  padding: 44px 24px 28px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr);
  gap: 36px 48px;
}

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

.footer-mark {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--green);
  margin-bottom: 8px;
}

.footer-slogan {
  font-size: 15px;
  color: var(--green-moss);
  margin-bottom: 14px;
}

.footer-compliance {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
  padding-top: 12px;
  border-top: 1px solid var(--line);
  max-width: 340px;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  min-width: 0;
}

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

.footer-nav-title {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--green);
  margin-bottom: 10px;
}

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

.footer-nav-list a {
  display: inline-block;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
  padding: 2px 0;
}

.footer-nav-list a:hover,
.footer-nav-list a:focus-visible {
  color: var(--green);
  text-decoration: underline;
}

.footer-note {
  grid-column: 1 / -1;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.footer-copyright {
  grid-column: 1 / -1;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

/* 2.7 内页通用列布局（主内容在前，aside 在后） */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--w-aside);
  gap: var(--gap-col);
  align-items: start;
}

.main-column,
.page-content {
  min-width: 0;
}

.sidebar,
.page-aside {
  min-width: 0;
  position: sticky;
  top: 24px;
}

/* --------------------------------------------------------------------------
   3. components — 通用区块、链接、表格、图片、列表
   -------------------------------------------------------------------------- */

/* 3.1 通用 section */
.section {
  margin-top: var(--space-section);
}

.section-head {
  margin-bottom: 22px;
}

.section-head h2,
.section-title {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--green);
  margin-bottom: 10px;
}

.section-lead,
.section-desc,
.section-intro {
  max-width: var(--w-prose);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.section-body {
  max-width: var(--w-prose);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
  margin-top: 14px;
}

.section-body + .section-body {
  margin-top: 12px;
}

.section-foot {
  margin-top: 20px;
}

.section-note {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin-bottom: 14px;
}

/* 3.2 文字入口链接 */
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--green);
  padding: 4px 0;
  border-bottom: 1px solid var(--wheat);
  transition: color 0.18s ease, border-color 0.18s ease;
}

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

.link-arrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1;
  transition: transform 0.18s ease;
}

.text-link:hover .link-arrow,
.text-link:focus-visible .link-arrow {
  transform: translateX(3px);
}

.hero-actions,
.cooperation-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 24px;
  margin-top: 22px;
}

/* 3.3 字段表（两列 label / value） */
.field-table {
  width: 100%;
  max-width: var(--w-wide);
  border-top: 1px solid var(--line-strong);
  font-size: 16px;
}

.field-table-caption,
.table-caption {
  caption-side: top;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--green-moss);
  padding-bottom: 10px;
}

.field-table th,
.field-table td {
  text-align: left;
  vertical-align: top;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  line-height: 1.7;
}

.field-table tbody tr:nth-child(odd) {
  background: var(--paper-grey);
}

.field-table tbody th {
  width: 32%;
  min-width: 120px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--green);
  white-space: normal;
}

.field-table tbody td {
  font-size: 16px;
  color: var(--ink);
}

.field-table thead th {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--green);
  background: var(--paper-deep);
  border-bottom: 1px solid var(--line-strong);
}

/* 3.4 图片容器 */
.media-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-grey);
  overflow: hidden;
}

.media-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.media-caption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  line-height: 1.7;
  color: var(--ink-soft);
  padding: 10px 14px;
  background: var(--paper);
  border-top: 1px solid var(--line);
}

/* 3.5 相关栏目入口 */
.related-links,
.related-nav {
  margin-top: var(--space-section);
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.related-title,
.related-nav > .section-title,
.related-links > .section-title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--green);
  margin-bottom: 14px;
}

.related-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
}

.related-links-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--green);
  padding: 4px 0;
  border-bottom: 1px solid var(--wheat);
}

/* --------------------------------------------------------------------------
   4. pages — 首页与各内页业务模块
   -------------------------------------------------------------------------- */

/* 4.1 首页 — 首屏 */
.home-main {
  display: block;
}

.hero-section {
  max-width: var(--w-page);
  margin: 0 auto;
  padding: 44px 24px 0;
}

.hero-layout {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: var(--gap-col);
  align-items: start;
}

.hero-index {
  border-top: 2px solid var(--green);
  padding-top: 16px;
}

.index-caption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--green-moss);
  margin-bottom: 14px;
}

.index-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

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

.index-link {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 10px;
  padding: 12px 0;
  color: var(--ink);
  transition: color 0.18s ease;
}

.index-num {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--wheat);
  line-height: 1.6;
  padding-top: 2px;
}

.index-name {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 600;
  color: var(--green);
  line-height: 1.5;
}

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

.index-link:hover .index-name,
.index-link:focus-visible .index-name {
  color: var(--green-moss);
}

.index-note {
  margin-top: 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
  padding-left: 10px;
  border-left: 2px solid var(--wheat);
}

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

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--green-moss);
  margin-bottom: 12px;
}

.hero-content h1 {
  font-family: var(--font-serif);
  font-size: 44px;
  font-weight: 600;
  line-height: 1.28;
  letter-spacing: 0.01em;
  color: var(--green);
  margin: 0 0 16px;
}

.hero-lead {
  max-width: 640px;
  font-size: 18px;
  line-height: 1.75;
  color: var(--green-moss);
  margin-bottom: 26px;
}

.hero-figure {
  margin: 0 0 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--paper-grey);
}

.hero-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.hero-caption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  line-height: 1.7;
  color: var(--ink-soft);
  padding: 10px 14px;
  background: var(--paper);
  border-top: 1px solid var(--line);
}

/* 4.2 首页 — 各区块容器宽度 */
.services-section,
.trace-section,
.process-section,
.standards-section,
.scope-section,
.faq-brief-section,
.cooperation-section {
  max-width: var(--w-page);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* 4.3 首页 — 服务矩阵 */
.service-list {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line-strong);
}

.service-item {
  position: relative;
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 18px;
  padding: 24px 0 22px;
  border-bottom: 1px solid var(--line);
}

.service-item.span-8 {
  grid-column: 1 / span 8;
}

.service-item.span-7 {
  grid-column: 5 / span 8;
}

.service-item::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 1px;
  background: var(--wheat);
  transition: width 0.3s ease;
}

.service-item:hover::after,
.service-item:focus-within::after {
  width: 100%;
}

.service-num {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--line-strong);
  line-height: 1.6;
  padding-top: 4px;
  transition: color 0.2s ease;
}

.service-item:hover .service-num,
.service-item:focus-within .service-num {
  color: var(--wheat);
}

.service-name {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--green);
  line-height: 1.4;
  margin-bottom: 8px;
}

.service-fields {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 6px 14px;
  align-items: baseline;
}

.service-fields dt {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--green-moss);
  line-height: 1.7;
}

.service-fields dd {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
  min-width: 0;
}

/* 4.4 首页 — 溯源记录 */
.trace-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 32px var(--gap-col);
  align-items: start;
}

.trace-figure {
  grid-column: 1 / span 5;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--paper-grey);
}

.trace-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.trace-figure figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  line-height: 1.7;
  color: var(--ink-soft);
  padding: 10px 14px;
  background: var(--paper);
  border-top: 1px solid var(--line);
}

.trace-text {
  grid-column: 6 / span 7;
  min-width: 0;
}

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

.trace-item {
  padding-left: 14px;
  border-left: 2px solid var(--wheat);
}

.trace-field {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--green);
  margin-bottom: 4px;
}

.trace-item p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

/* 4.5 首页 — 四阶段 */
.stage-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  border-top: 1px solid var(--line-strong);
  padding-top: 22px;
}

.stage-item {
  min-width: 0;
  padding-right: 16px;
  border-right: 1px solid var(--line);
}

.stage-item:last-child {
  border-right: 0;
  padding-right: 0;
}

.stage-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--wheat);
  margin-bottom: 8px;
}

.stage-name {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 600;
  color: var(--green);
  line-height: 1.45;
  margin-bottom: 8px;
}

.stage-action {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
  margin-bottom: 10px;
}

.stage-output {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.03em;
  line-height: 1.7;
  color: var(--green-moss);
  padding-top: 8px;
  border-top: 1px dashed var(--line-strong);
}

/* 4.6 首页 — 服务标准字段表 */
.standards-section .field-table {
  max-width: 100%;
}

/* 4.7 首页 — 适用与边界 */
.scope-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px var(--gap-col);
}

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

.scope-subtitle {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 600;
  color: var(--green);
  line-height: 1.45;
  margin-bottom: 14px;
}

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

.scope-list li {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
  padding-left: 14px;
}

.scope-fit .scope-list li {
  border-left: 3px solid var(--wheat);
}

.scope-boundary .scope-list li {
  border-left: 3px solid var(--brick);
}

.scope-boundary .scope-subtitle {
  color: var(--brick);
}

/* 4.8 首页 — 常见问题摘要 */
.faq-brief-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 var(--gap-col);
  border-top: 1px solid var(--line-strong);
}

.faq-brief-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  min-width: 0;
}

.faq-brief-q {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 600;
  color: var(--green);
  line-height: 1.5;
  margin-bottom: 6px;
}

.faq-brief-a {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* 4.9 首页 — 合作引导 */
.cooperation-section {
  padding-top: 32px;
  padding-bottom: 8px;
  border-top: 1px solid var(--line-strong);
  margin-top: var(--space-section);
}

.cooperation-section h2 {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 600;
  color: var(--green);
  margin-bottom: 12px;
}

.cooperation-text {
  max-width: var(--w-prose);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

/* 4.10 内页 — 服务矩阵页 */
.page-head {
  margin-bottom: 28px;
}

.page-head-inner {
  min-width: 0;
}

.page-head .page-tags {
  margin-top: 16px;
}

.section-index {
  margin-bottom: 40px;
  border-top: 1px solid var(--line-strong);
  padding-top: 16px;
}

.section-index-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.section-index-item {
  min-width: 0;
}

.section-index-item a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 0;
  color: var(--green);
  font-size: 15px;
  font-weight: 600;
  border-bottom: 1px solid var(--line);
  transition: border-color 0.18s ease, color 0.18s ease;
}

.section-index-item a:hover,
.section-index-item a:focus-visible {
  color: var(--green-moss);
  border-bottom-color: var(--wheat);
}

.section-index-item .index-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--wheat);
}

.section-index-item .index-name {
  font-family: var(--font-sans);
  font-size: 15px;
  color: inherit;
}

.service-block {
  display: grid;
  grid-template-columns: 4fr 6fr;
  gap: 32px var(--gap-col);
  align-items: start;
  padding: 32px 0;
  border-top: 1px solid var(--line);
}

.service-block:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.service-block-reverse {
  grid-template-columns: 6fr 4fr;
}

.service-block-reverse .service-media {
  order: 2;
}

.service-block-reverse .service-body {
  order: 1;
}

.service-media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--paper-grey);
}

.service-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

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

.service-seq {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--wheat);
  margin-bottom: 8px;
}

.service-title {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 600;
  color: var(--green);
  line-height: 1.4;
  margin-bottom: 10px;
}

.service-intro {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
  margin-bottom: 16px;
}

.service-body .service-fields {
  grid-template-columns: 100px minmax(0, 1fr);
  gap: 8px 14px;
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.service-body .field-label {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--green-moss);
  line-height: 1.7;
}

.service-body .field-value {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
  min-width: 0;
}

.linkage-section {
  margin-top: var(--space-section);
  padding-top: 24px;
  border-top: 1px solid var(--line-strong);
}

.linkage-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px var(--gap-col);
  margin-top: 18px;
}

.linkage-step {
  min-width: 0;
  padding-left: 14px;
  border-left: 2px solid var(--wheat);
}

.linkage-step .step-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--wheat);
  margin-bottom: 6px;
}

.linkage-step .step-title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--green);
  line-height: 1.45;
  margin-bottom: 6px;
}

.linkage-step .step-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* 4.11 内页 — 核验与溯源页 */
.page-hero {
  margin-bottom: 32px;
}

.page-hero .page-lead {
  margin-bottom: 14px;
}

.page-hero .page-tags {
  margin-top: 0;
}

.trace-lines .section-intro {
  margin-bottom: 22px;
}

.trace-line {
  padding: 20px 0;
  border-top: 1px solid var(--line);
  min-width: 0;
}

.trace-line .line-index {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--wheat);
  margin-bottom: 6px;
}

.trace-line .line-title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--green);
  line-height: 1.45;
  margin-bottom: 8px;
}

.trace-line .line-body {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
  margin-bottom: 8px;
}

.trace-line .line-basis {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.03em;
  line-height: 1.7;
  color: var(--green-moss);
  padding-left: 12px;
  border-left: 2px solid var(--paper-grey);
}

.trace-media .media-figure {
  margin-top: 16px;
}

.sidebar-title {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 600;
  color: var(--green);
  line-height: 1.45;
  margin-bottom: 8px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--green);
}

.sidebar-intro {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
  margin-bottom: 14px;
}

.field-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.field-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.field-name {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--green);
}

.field-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.sidebar-note {
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
  padding: 10px 12px;
  background: var(--paper-grey);
  border-radius: var(--radius-sm);
}

/* 4.12 内页 — 响应流程页 */
.stage-section .section-intro {
  margin-bottom: 24px;
}

.stage-block {
  padding: 22px 0;
  border-top: 1px solid var(--line);
  min-width: 0;
}

.stage-code {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--wheat);
  margin-bottom: 6px;
}

.stage-block .stage-name {
  font-family: var(--font-serif);
  font-size: 21px;
  font-weight: 600;
  color: var(--green);
  line-height: 1.45;
  margin-bottom: 8px;
}

.stage-body {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
  margin-bottom: 10px;
}

.stage-field {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  padding-left: 12px;
  border-left: 2px solid var(--paper-grey);
  margin-bottom: 6px;
}

.stage-field .field-label {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--green-moss);
  margin-right: 8px;
}

.stage-section + .media-figure {
  margin-top: 28px;
}

.archive-section {
  margin-top: var(--space-section);
  padding-top: 22px;
  border-top: 1px solid var(--line-strong);
}

.archive-section h2 {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--green);
  margin-bottom: 12px;
}

.archive-section p {
  max-width: var(--w-prose);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

.archive-section p + p {
  margin-top: 12px;
}

.aside-title {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 600;
  color: var(--green);
  line-height: 1.45;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--green);
}

.page-aside .stage-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 0;
  padding-top: 0;
}

.stage-list-item {
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  border-right: 0;
  min-width: 0;
}

.stage-list-name {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--green);
  margin-bottom: 2px;
}

.stage-list-tip {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.aside-note {
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
  padding: 10px 12px;
  background: var(--paper-grey);
  border-radius: var(--radius-sm);
}

/* 4.13 内页 — 服务标准页 */
.deliverables-intro {
  margin-bottom: 32px;
}

.deliverables-intro h2 {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 600;
  color: var(--green);
  margin-bottom: 12px;
}

.deliverables-intro p {
  max-width: var(--w-prose);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

.deliverables-intro p + p {
  margin-top: 12px;
}

.field-section {
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.field-section h2 {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--green);
  margin-bottom: 8px;
}

.media-section {
  margin-top: var(--space-section);
  padding-top: 24px;
  border-top: 1px solid var(--line-strong);
}

.media-section h2 {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--green);
  margin-bottom: 14px;
}

.media-section .media-figure {
  max-width: var(--w-wide);
}

.media-section > p {
  max-width: var(--w-prose);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
  margin-top: 14px;
}

.norm-section {
  margin-top: var(--space-section);
  padding-top: 24px;
  border-top: 1px solid var(--line-strong);
}

.norm-section h2 {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--green);
  margin-bottom: 18px;
}

.norm-block {
  max-width: var(--w-prose);
  padding: 0 0 18px 14px;
  border-left: 2px solid var(--wheat);
  margin-bottom: 18px;
}

.norm-block:last-child {
  margin-bottom: 0;
}

.norm-block h3 {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--green);
  line-height: 1.45;
  margin-bottom: 6px;
}

.norm-block p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

/* 4.14 内页 — 合作方式页 */
.cooperation-steps {
  margin-top: 8px;
}

.step-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 var(--gap-col);
  border-top: 1px solid var(--line-strong);
}

.step-item {
  min-width: 0;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.step-item .step-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--wheat);
  margin-bottom: 6px;
}

.step-item .step-name {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 600;
  color: var(--green);
  line-height: 1.45;
  margin-bottom: 8px;
}

.step-prepare {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
  margin-bottom: 8px;
}

.step-output {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.03em;
  line-height: 1.7;
  color: var(--green-moss);
  padding-top: 8px;
  border-top: 1px dashed var(--line-strong);
}

.cooperation-scene .media-figure {
  margin-top: 16px;
  max-width: var(--w-wide);
}

.scene-text {
  max-width: var(--w-prose);
  margin-top: 16px;
}

.scene-text p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

.scene-text p + p {
  margin-top: 12px;
}

.division-table {
  max-width: 100%;
}

.division-table tbody th {
  width: 22%;
}

.division-table tbody td {
  width: 39%;
  font-size: 15px;
}

.confidential-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px var(--gap-col);
  margin-top: 18px;
}

.confidential-block {
  min-width: 0;
  padding-left: 14px;
  border-left: 2px solid var(--wheat);
}

.confidential-title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--green);
  line-height: 1.45;
  margin-bottom: 6px;
}

.confidential-block p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.note-box {
  padding: 22px 24px;
  background: var(--paper-grey);
  border-left: 3px solid var(--green);
  border-radius: var(--radius-sm);
}

.note-box h2 {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--green);
  margin-bottom: 10px;
}

.note-box p {
  max-width: var(--w-prose);
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.note-box p + p {
  margin-top: 10px;
}

/* 4.15 内页 — 常见问题页 */
.faq-index {
  margin-bottom: 36px;
  border-top: 1px solid var(--line-strong);
  padding-top: 16px;
}

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

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

.faq-index-item a {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px 10px;
  padding: 10px 12px;
  background: var(--paper-grey);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--green);
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.faq-index-item a:hover,
.faq-index-item a:focus-visible {
  border-color: var(--wheat);
  background: var(--paper);
}

.faq-index-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--wheat);
}

.faq-index-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--green);
}

.faq-index-count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-soft);
  margin-left: auto;
}

.faq-group {
  margin-top: var(--space-section);
  padding-top: 24px;
  border-top: 1px solid var(--line-strong);
}

.faq-group-head {
  margin-bottom: 18px;
}

.faq-group-head h2 {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 600;
  color: var(--green);
  margin-bottom: 8px;
}

.faq-group-desc {
  max-width: var(--w-prose);
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.faq-media {
  margin-bottom: 22px;
}

.faq-media .media-figure {
  max-width: var(--w-wide);
}

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

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

.faq-question {
  position: relative;
  display: block;
  padding: 16px 40px 16px 16px;
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--green);
  cursor: pointer;
  list-style: none;
  transition: background-color 0.18s ease;
}

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

.faq-question::after {
  content: "＋";
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--green-moss);
  transition: transform 0.2s ease, color 0.2s ease;
}

.faq-item[open] > .faq-question {
  background: var(--paper-grey);
}

.faq-item[open] > .faq-question::after {
  content: "－";
  color: var(--green);
}

.faq-question:hover {
  background: var(--paper-grey);
}

.faq-answer {
  padding: 4px 16px 18px;
}

.faq-answer p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

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

/* 4.16 404 页 */
.error-main {
  min-height: 52vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 64px 24px 80px;
}

.error-block {
  max-width: 640px;
  width: 100%;
  border-top: 2px solid var(--green);
  padding-top: 26px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--wheat);
  margin-bottom: 10px;
}

.error-block h1 {
  font-family: var(--font-serif);
  font-size: 34px;
  font-weight: 600;
  color: var(--green);
  line-height: 1.35;
  margin-bottom: 12px;
}

.error-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin-bottom: 22px;
}

.error-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin-bottom: 24px;
}

.error-links a {
  font-size: 15px;
  font-weight: 600;
  color: var(--green);
  padding: 4px 0;
  border-bottom: 1px solid var(--wheat);
}

.error-home-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 22px;
  background: var(--green);
  color: var(--paper);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background-color 0.18s ease;
}

.error-home-link:hover,
.error-home-link:focus-visible {
  background: var(--green-moss);
  color: var(--paper);
}

/* --------------------------------------------------------------------------
   5. responsive — 960px / 640px 两档
   -------------------------------------------------------------------------- */

@media (max-width: 960px) {
  .header-inner {
    padding: 0 20px;
  }

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

  .primary-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: var(--header-h);
    background: var(--paper);
    border-bottom: 1px solid var(--green);
    box-shadow: 0 8px 18px rgba(30, 58, 43, 0.08);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 20px 16px;
  }

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

  .nav-list > li {
    border-bottom: 1px solid var(--line);
  }

  .nav-list > li:last-child {
    border-bottom: 0;
  }

  .nav-link {
    display: flex;
    width: 100%;
    min-height: 48px;
    padding: 10px 4px;
    font-size: 16px;
    border-radius: 0;
  }

  .nav-link-cta {
    justify-content: center;
    margin-top: 8px;
    border-radius: var(--radius-sm);
  }

  .inner-main {
    padding: 22px 20px 60px;
  }

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

  .page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 36px;
  }

  .sidebar,
  .page-aside {
    position: static;
    top: auto;
  }

  .hero-section {
    padding: 32px 20px 0;
  }

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

  .hero-index {
    order: 2;
    border-top: 1px solid var(--line-strong);
    padding-top: 18px;
  }

  .hero-content {
    order: 1;
  }

  .index-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 20px;
  }

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

  .hero-content h1 {
    font-size: 34px;
  }

  .hero-lead {
    font-size: 17px;
  }

  .services-section,
  .trace-section,
  .process-section,
  .standards-section,
  .scope-section,
  .faq-brief-section,
  .cooperation-section {
    padding-left: 20px;
    padding-right: 20px;
  }

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

  .service-item.span-8,
  .service-item.span-7 {
    grid-column: 1 / -1;
  }

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

  .trace-figure,
  .trace-text {
    grid-column: 1 / -1;
  }

  .stage-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px 20px;
  }

  .stage-item {
    border-right: 0;
    padding-right: 0;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--line);
  }

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

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

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

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

  .service-block,
  .service-block-reverse {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .service-block-reverse .service-media,
  .service-block-reverse .service-body {
    order: initial;
  }

  .linkage-steps {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

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

  .confidential-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

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

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding: 36px 20px 24px;
  }

  .footer-nav {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .footer-compliance {
    max-width: none;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  :root {
    --header-h: 64px;
  }

  .header-inner {
    padding: 0 16px;
    height: 64px;
  }

  .brand-mark {
    font-size: 19px;
  }

  .nav-list {
    padding: 8px 16px 16px;
  }

  .inner-main {
    padding: 18px 16px 52px;
  }

  .page-title {
    font-size: 28px;
  }

  .page-lead {
    font-size: 16px;
  }

  .section-head h2,
  .section-title,
  .faq-group-head h2,
  .deliverables-intro h2,
  .cooperation-section h2 {
    font-size: 21px;
  }

  .hero-section {
    padding: 24px 16px 0;
  }

  .hero-content h1 {
    font-size: 28px;
  }

  .hero-lead {
    font-size: 16px;
    margin-bottom: 20px;
  }

  .hero-actions,
  .cooperation-actions {
    gap: 16px;
  }

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

  .services-section,
  .trace-section,
  .process-section,
  .standards-section,
  .scope-section,
  .faq-brief-section,
  .cooperation-section {
    padding-left: 16px;
    padding-right: 16px;
  }

  .service-item {
    grid-template-columns: 40px minmax(0, 1fr);
    column-gap: 12px;
    padding: 20px 0;
  }

  .service-name {
    font-size: 19px;
  }

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

  .service-fields dt {
    margin-top: 6px;
  }

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

  .stage-item {
    padding: 16px 0;
    border-bottom: 1px solid var(--line);
  }

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

  .field-table {
    display: block;
    border-top: 1px solid var(--line-strong);
  }

  .field-table thead {
    display: none;
  }

  .field-table tbody,
  .field-table tr {
    display: block;
  }

  .field-table tbody tr {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    padding: 10px 0;
    border-bottom: 1px solid var(--line);
  }

  .field-table tbody tr:nth-child(odd) {
    background: transparent;
  }

  .field-table tbody th,
  .field-table tbody td {
    display: block;
    width: auto;
    min-width: 0;
    border-bottom: 0;
    padding: 2px 12px;
  }

  .field-table tbody th {
    color: var(--green);
  }

  .section-index-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .service-body .service-fields {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
  }

  .service-body .field-label {
    margin-top: 6px;
  }

  .trace-line .line-title {
    font-size: 18px;
  }

  .stage-block .stage-name {
    font-size: 19px;
  }

  .faq-question {
    font-size: 17px;
    padding: 14px 36px 14px 12px;
  }

  .faq-answer {
    padding: 4px 12px 16px;
  }

  .faq-index-item a {
    padding: 10px;
  }

  .faq-index-count {
    margin-left: 0;
  }

  .note-box {
    padding: 18px 16px;
  }

  .error-main {
    padding: 44px 16px 60px;
  }

  .error-block h1 {
    font-size: 26px;
  }

  .footer-inner {
    padding: 32px 16px 22px;
  }

  .footer-nav {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .footer-nav-list a {
    min-height: 40px;
    display: inline-flex;
    align-items: center;
  }
}

/* --------------------------------------------------------------------------
   6. 打印
   -------------------------------------------------------------------------- */
@media print {
  .site-header,
  .nav-toggle,
  .primary-nav,
  .sidebar,
  .page-aside,
  .related-links,
  .related-nav,
  .site-footer {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .inner-main,
  .hero-section,
  .services-section,
  .trace-section,
  .process-section,
  .standards-section,
  .scope-section,
  .faq-brief-section,
  .cooperation-section {
    max-width: none;
    padding: 0;
  }

  .page-layout {
    display: block;
  }
}

/* --------------------------------------------------------------------------
   7. 动效增强（不影响初始可见性）
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: no-preference) {
  .service-item,
  .stage-item,
  .trace-line,
  .faq-brief-item,
  .norm-block,
  .confidential-block {
    transition: transform 0.25s ease, border-color 0.25s ease;
  }

  .service-item:hover,
  .stage-item:hover,
  .trace-line:hover {
    transform: translateY(-2px);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}