/* ==========================================================================
   天美国产 · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base
   -------------------------------------------------------------------------- */

:root {
  --c-primary: #1F6F6B;
  --c-primary-dark: #154F4C;
  --c-accent: #C97B3C;
  --c-bg: #F7F8F7;
  --c-surface: #FFFFFF;
  --c-border: #DDE3E1;
  --c-text: #1D2422;
  --c-muted: #5A6764;
  --c-border-strong: #C4CFCC;
  --radius: 6px;
  --container: 1120px;
  --reading: 760px;
  --font-stack: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

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

body {
  margin: 0;
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-text);
  background-color: var(--c-bg);
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 600;
  line-height: 1.4;
  color: var(--c-text);
}

p {
  margin: 0;
}

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

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

a:hover {
  color: var(--c-primary-dark);
}

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

figure {
  margin: 0;
}

strong {
  font-weight: 600;
}

button {
  font-family: inherit;
}

.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: 12px;
  top: -60px;
  z-index: 200;
  padding: 10px 18px;
  background-color: var(--c-primary);
  color: #FFFFFF;
  border-radius: var(--radius);
  font-size: 14px;
  transition: top 0.18s ease;
}

.skip-link:focus {
  top: 12px;
  color: #FFFFFF;
}

:focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   layout  ·  全站骨架
   -------------------------------------------------------------------------- */

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

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  min-height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--c-text);
  flex-shrink: 0;
}

.brand:hover {
  color: var(--c-text);
}

.brand-mark {
  display: inline-block;
  font-size: 19px;
  font-weight: 600;
  color: var(--c-primary-dark);
}

.brand-sub {
  display: inline-block;
  font-size: 12px;
  color: var(--c-muted);
  border-left: 1px solid var(--c-border);
  padding-left: 10px;
  line-height: 1.4;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  background-color: transparent;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  cursor: pointer;
}

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

.primary-nav {
  min-width: 0;
}

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

.nav-link {
  display: inline-block;
  padding: 8px 12px;
  font-size: 15px;
  color: var(--c-muted);
  border-bottom: 2px solid transparent;
  line-height: 1.5;
}

.nav-link:hover {
  color: var(--c-text);
  border-bottom-color: var(--c-border-strong);
}

.nav-link.is-current {
  color: var(--c-text);
  font-weight: 600;
  border-bottom-color: var(--c-primary);
}

.site-main {
  display: block;
}

.inner-main {
  padding-bottom: 8px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 20px 24px 0;
  font-size: 13px;
  color: var(--c-muted);
}

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

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

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

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

.page-header {
  max-width: var(--container);
  margin: 0 auto;
  padding: 14px 24px 0;
}

.page-title {
  font-size: 28px;
  line-height: 1.35;
  color: var(--c-text);
}

.page-head {
  max-width: var(--container);
  margin: 0 auto;
  padding: 12px 24px 0;
}

.page-lead {
  max-width: var(--reading);
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

.page-layout {
  display: grid;
  gap: 40px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 32px 24px 48px;
  align-items: start;
}

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

.layout-main-aside {
  grid-template-columns: minmax(0, 1fr) 280px;
}

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

.page-body {
  max-width: 720px;
}

.content-main {
  max-width: 720px;
  min-width: 0;
}

.site-footer {
  margin-top: 48px;
  background-color: var(--c-surface);
  border-top: 1px solid var(--c-border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1.4fr;
  gap: 40px;
  padding-top: 44px;
  padding-bottom: 32px;
}

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

.footer-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 12px;
}

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

.footer-links a {
  font-size: 14px;
  color: var(--c-muted);
}

.footer-links a:hover {
  color: var(--c-primary);
}

.footer-col-about p {
  font-size: 13px;
  line-height: 1.8;
  color: var(--c-muted);
}

.footer-bottom {
  padding-top: 16px;
  padding-bottom: 24px;
  border-top: 1px solid var(--c-border);
}

.footer-copy {
  font-size: 13px;
  color: var(--c-muted);
}

/* --------------------------------------------------------------------------
   components  ·  通用组件
   -------------------------------------------------------------------------- */

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  background-color: var(--c-primary);
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid var(--c-primary);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius);
}

.btn-ghost {
  background-color: transparent;
  color: var(--c-primary);
  border: 1px solid var(--c-border-strong);
}

.btn-ghost:hover {
  border-color: var(--c-primary);
  color: var(--c-primary-dark);
}

.section {
  padding: 52px 0;
}

.section-head {
  margin-bottom: 26px;
}

.section-head h2 {
  font-size: 22px;
  margin-bottom: 8px;
}

.section-desc {
  max-width: var(--reading);
  font-size: 15px;
  color: var(--c-muted);
}

.section-title {
  font-size: 22px;
  margin-bottom: 12px;
}

.section-lead {
  max-width: var(--reading);
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
  margin-bottom: 20px;
}

.section-intro {
  max-width: 640px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
  margin-bottom: 20px;
}

.sub-title {
  font-size: 17px;
  margin: 26px 0 12px;
}

.figure-block {
  margin: 0;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--c-surface);
}

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

.figure-caption {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-muted);
  border-top: 1px solid var(--c-border);
}

.figure-tag {
  display: inline-block;
  padding: 1px 8px;
  font-size: 12px;
  color: var(--c-accent);
  border: 1px solid rgba(201, 123, 60, 0.45);
  border-radius: 3px;
  white-space: nowrap;
}

.content-figure,
.media-figure {
  margin: 22px 0;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--c-surface);
}

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

.media-caption {
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-muted);
  border-top: 1px solid var(--c-border);
}

.media-tag {
  display: inline-block;
  margin-right: 6px;
  padding: 1px 8px;
  font-size: 12px;
  color: var(--c-accent);
  border: 1px solid rgba(201, 123, 60, 0.45);
  border-radius: 3px;
}

.text-link {
  display: inline-block;
  font-size: 14px;
  color: var(--c-primary);
  border-bottom: 1px solid rgba(31, 111, 107, 0.35);
  padding-bottom: 1px;
}

.text-link:hover {
  color: var(--c-primary-dark);
  border-bottom-color: var(--c-primary-dark);
}

/* 数据表格 */

.table-wrap {
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  background-color: var(--c-surface);
  -webkit-overflow-scrolling: touch;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  line-height: 1.65;
}

.data-table thead th {
  text-align: left;
  font-weight: 600;
  font-size: 13px;
  color: var(--c-muted);
  background-color: #F1F4F3;
  padding: 12px 14px;
  border-bottom: 1px solid var(--c-border);
  white-space: nowrap;
}

.data-table tbody td {
  padding: 14px;
  border-bottom: 1px solid var(--c-border);
  vertical-align: top;
}

.data-table tbody tr:last-child td {
  border-bottom: 0;
}

.data-table tbody tr:hover td {
  background-color: #FAFBFB;
}

.data-table tbody td a {
  color: var(--c-primary);
  font-size: 14px;
}

.data-table tbody td a:hover {
  color: var(--c-primary-dark);
  text-decoration: underline;
}

.table-caption {
  caption-side: top;
  text-align: left;
  padding: 12px 14px;
  font-size: 13px;
  color: var(--c-muted);
  border-bottom: 1px solid var(--c-border);
  background-color: #F1F4F3;
}

/* 清单 */

.check-list {
  margin-top: 14px;
}

.check-list li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-text);
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 12px;
  width: 7px;
  height: 7px;
  background-color: var(--c-primary);
  border-radius: 1px;
}

.deliverable-list {
  border-top: 1px solid var(--c-border);
}

.deliverable-item {
  display: grid;
  grid-template-columns: minmax(120px, 0.8fr) minmax(0, 1.6fr);
  gap: 16px;
  padding: 12px 2px;
  border-bottom: 1px solid var(--c-border);
  font-size: 15px;
  line-height: 1.7;
}

.deliverable-name {
  font-weight: 600;
  color: var(--c-text);
}

.deliverable-use {
  color: var(--c-muted);
}

.limit-list {
  margin-top: 4px;
}

.limit-list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 8px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-muted);
}

.limit-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--c-accent);
}

.acceptance-list {
  counter-reset: acc;
}

.acceptance-item {
  position: relative;
  counter-increment: acc;
  padding: 10px 0 10px 34px;
  border-bottom: 1px dashed var(--c-border);
  font-size: 15px;
  line-height: 1.75;
}

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

.acceptance-item::before {
  content: counter(acc, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 10px;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--c-accent);
  font-weight: 600;
}

/* 折叠问答 */

.faq-item {
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  background-color: var(--c-surface);
  margin-bottom: 10px;
  overflow: hidden;
}

.faq-question {
  position: relative;
  display: block;
  padding: 14px 46px 14px 16px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--c-text);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "";
  position: absolute;
  right: 18px;
  top: 50%;
  width: 8px;
  height: 8px;
  margin-top: -6px;
  border-right: 2px solid var(--c-muted);
  border-bottom: 2px solid var(--c-muted);
  transform: rotate(45deg);
  transition: transform 0.18s ease;
}

.faq-item[open] .faq-question::after {
  transform: rotate(-135deg);
  margin-top: -2px;
}

.faq-item[open] .faq-question {
  color: var(--c-primary-dark);
}

.faq-answer {
  padding: 0 16px 14px;
  border-top: 1px solid var(--c-border);
}

.faq-answer p {
  padding-top: 12px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

.faq-answer a {
  color: var(--c-primary);
  border-bottom: 1px solid rgba(31, 111, 107, 0.35);
}

/* 侧栏 */

.aside-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--c-border);
}

.aside-list {
  border-top: 1px solid var(--c-border);
}

.aside-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--c-border);
}

.aside-item a {
  display: inline-block;
  font-size: 15px;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 4px;
}

.aside-item a:hover {
  color: var(--c-primary);
}

.aside-desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-muted);
}

/* --------------------------------------------------------------------------
   pages  ·  首页
   -------------------------------------------------------------------------- */

.hero {
  padding: 56px 0 48px;
  background-color: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: start;
}

.col-hero-main {
  min-width: 0;
}

.hero-eyebrow {
  font-size: 13px;
  color: var(--c-accent);
  font-weight: 600;
  margin-bottom: 12px;
}

.hero h1 {
  font-size: 34px;
  line-height: 1.32;
  margin-bottom: 16px;
}

.hero-lead {
  max-width: 560px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-muted);
  margin-bottom: 24px;
}

.task-paths {
  margin-top: 28px;
  border-top: 1px solid var(--c-border);
}

.task-path {
  border-bottom: 1px solid var(--c-border);
}

.task-path-link {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 18px;
  grid-template-areas:
    "title arrow"
    "desc arrow";
  align-items: center;
  gap: 2px 12px;
  min-height: 56px;
  padding: 12px 4px;
  color: var(--c-text);
}

.task-path-link:hover {
  color: var(--c-primary-dark);
}

.task-path-title {
  grid-area: title;
  font-size: 15px;
  font-weight: 600;
}

.task-path-desc {
  grid-area: desc;
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-muted);
}

.task-path-arrow {
  grid-area: arrow;
  justify-self: end;
  font-size: 16px;
  color: var(--c-primary);
}

.col-hero-visual {
  min-width: 0;
}

.col-hero-visual .figure-block img {
  aspect-ratio: 4 / 3;
}

/* 服务目录速览表 */

.section-catalog {
  background-color: var(--c-bg);
}

.section-catalog .data-table tbody td:first-child {
  font-weight: 600;
  color: var(--c-text);
}

/* 典型场景与判断说明 */

.scene-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

.col-scene,
.col-judgement {
  min-width: 0;
}

.scene-item {
  padding: 16px 0;
  border-top: 1px solid var(--c-border);
}

.scene-item:last-child {
  border-bottom: 1px solid var(--c-border);
}

.scene-name {
  font-size: 16px;
  margin-bottom: 6px;
}

.scene-state {
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-muted);
}

.judgement-item {
  padding: 16px 0;
  border-top: 1px solid var(--c-border);
}

.judgement-item:last-child {
  border-bottom: 1px solid var(--c-border);
}

.judgement-title {
  font-size: 15px;
  margin-bottom: 6px;
  color: var(--c-primary-dark);
}

.judgement-item p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-muted);
}

/* 交付物核对区 */

.section-checklist {
  background-color: var(--c-surface);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
}

.checklist-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: start;
}

.checklist-grid .figure-block img {
  aspect-ratio: 4 / 3;
}

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

.checklist-body h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.checklist-body > p {
  max-width: 560px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

/* 交付节点时间线 */

.timeline {
  counter-reset: tl;
  border-left: 2px solid var(--c-border);
  padding-left: 0;
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  padding: 0 0 26px 0;
}

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

.timeline-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  margin-left: -18px;
  background-color: var(--c-surface);
  border: 2px solid var(--c-primary);
  border-radius: 50%;
  font-size: 13px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--c-primary-dark);
}

.timeline-body {
  min-width: 0;
  padding-top: 4px;
}

.timeline-stage {
  font-size: 16px;
  margin-bottom: 4px;
}

.timeline-body p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-muted);
}

/* 关键资料与延伸阅读 */

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

.resource-card {
  display: flex;
  flex-direction: column;
  padding: 20px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
}

.resource-card:hover {
  border-color: var(--c-border-strong);
}

.resource-title {
  font-size: 16px;
  margin-bottom: 8px;
}

.resource-desc {
  flex: 1 1 auto;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-muted);
  margin-bottom: 14px;
}

.resource-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-primary);
}

.resource-link:hover {
  color: var(--c-primary-dark);
}

/* --------------------------------------------------------------------------
   pages  ·  服务目录
   -------------------------------------------------------------------------- */

.service-index {
  position: sticky;
  top: 84px;
  min-width: 0;
  max-width: 100%;
}

.service-index-list {
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  background-color: var(--c-surface);
  overflow: hidden;
}

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

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

.service-index-link {
  display: block;
  padding: 12px 14px 12px 12px;
  border-left: 3px solid transparent;
  color: var(--c-text);
}

.service-index-link:hover {
  background-color: #F4F7F6;
  border-left-color: var(--c-border-strong);
}

.service-index-name {
  display: block;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
}

.service-index-target {
  display: block;
  margin-top: 2px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--c-muted);
}

.service-index-item.is-active .service-index-link {
  border-left-color: var(--c-primary);
  background-color: #F1F6F5;
}

.service-index-item.is-active .service-index-name {
  color: var(--c-primary-dark);
}

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

.scope-limits {
  margin: 22px 0;
  padding: 16px 18px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border);
  border-left: 3px solid var(--c-accent);
  border-radius: var(--radius);
}

.scope-limits .sub-title {
  margin-top: 0;
  font-size: 15px;
}

.service-compare {
  margin-top: 44px;
  padding-top: 32px;
  border-top: 1px solid var(--c-border);
}

.further-reading {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--c-border);
}

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

.reading-card {
  padding: 18px 20px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
}

.reading-card:hover {
  border-color: var(--c-border-strong);
}

.reading-card-title {
  font-size: 16px;
  margin-bottom: 6px;
}

.reading-card-title a {
  color: var(--c-text);
}

.reading-card-title a:hover {
  color: var(--c-primary);
}

.reading-card-desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-muted);
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px 40px;
}

.related-links-label {
  font-size: 13px;
  color: var(--c-muted);
}

.related-links-item {
  display: inline-block;
  padding: 6px 14px;
  font-size: 14px;
  color: var(--c-primary);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

.related-links-item:hover {
  border-color: var(--c-primary);
  color: var(--c-primary-dark);
}

/* --------------------------------------------------------------------------
   pages  ·  国产化适配
   -------------------------------------------------------------------------- */

.section-block {
  padding: 0 0 32px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--c-border);
}

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

.section-block > p {
  max-width: var(--reading);
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

.scene-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
  margin-top: 20px;
}

.col-title {
  font-size: 15px;
  color: var(--c-primary-dark);
  margin-bottom: 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--c-border);
}

.scene-list,
.precondition-list {
  counter-reset: pair;
}

.scene-list .scene-item,
.precondition-list .precondition-item {
  position: relative;
  counter-increment: pair;
  padding: 10px 0 10px 30px;
  border-bottom: 1px dashed var(--c-border);
}

.scene-list .scene-item:last-child,
.precondition-list .precondition-item:last-child {
  border-bottom: 0;
}

.scene-list .scene-item::before,
.precondition-list .precondition-item::before {
  content: counter(pair, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--c-accent);
  font-variant-numeric: tabular-nums;
}

.scene-list .scene-name,
.precondition-list .precondition-name {
  display: block;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 2px;
}

.scene-list .scene-desc,
.precondition-list .precondition-desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-muted);
}

.timeline-list {
  counter-reset: step;
  margin-top: 18px;
}

.timeline-list .timeline-item {
  position: relative;
  counter-increment: step;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding: 0 0 22px 0;
}

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

.timeline-list .timeline-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background-color: #EDF3F2;
  border: 1px solid var(--c-border);
  font-size: 12px;
  font-weight: 600;
  color: var(--c-primary-dark);
  font-variant-numeric: tabular-nums;
}

.timeline-list .timeline-name {
  font-size: 16px;
  margin-bottom: 4px;
}

.timeline-list .timeline-output {
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-muted);
}

.timeline-list .timeline-party {
  margin-top: 4px;
  font-size: 13px;
  color: var(--c-accent);
}

.content-aside {
  position: sticky;
  top: 84px;
  min-width: 0;
  padding: 18px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
}

#cooperation a {
  color: var(--c-primary);
  border-bottom: 1px solid rgba(31, 111, 107, 0.35);
}

#cooperation a:hover {
  color: var(--c-primary-dark);
}

/* --------------------------------------------------------------------------
   pages  ·  接入准备
   -------------------------------------------------------------------------- */

.reading-body {
  max-width: var(--reading);
  margin: 0 auto;
  padding: 28px 0 8px;
}

.content-section {
  padding: 0 0 28px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--c-border);
}

.content-section:last-child {
  border-bottom: 0;
  margin-bottom: 0;
}

.content-section h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.content-section > p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

.checklist-group {
  margin-top: 22px;
}

.checklist-title {
  font-size: 16px;
  color: var(--c-primary-dark);
  margin-bottom: 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--c-border);
}

.checklist {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px 24px;
}

.checklist-item {
  position: relative;
  padding: 6px 0 6px 20px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-text);
}

.checklist-item::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 15px;
  width: 8px;
  height: 8px;
  border: 1px solid var(--c-primary);
  border-radius: 2px;
}

.content-section .faq-item {
  margin-top: 10px;
}

.related-section .related-links {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  max-width: none;
  margin: 0;
  padding: 0;
}

.related-section .related-item a {
  display: block;
  padding: 12px 14px;
  font-size: 14px;
  color: var(--c-text);
  background-color: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
}

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

/* --------------------------------------------------------------------------
   pages  ·  常见问题
   -------------------------------------------------------------------------- */

.faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 40px;
  align-items: start;
  padding-top: 32px;
  padding-bottom: 40px;
}

.faq-body {
  min-width: 0;
  max-width: 780px;
}

.faq-group {
  margin-bottom: 34px;
}

.faq-group:last-child {
  margin-bottom: 0;
}

.faq-group .section-title {
  font-size: 20px;
  margin-bottom: 6px;
}

.section-note {
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-muted);
  margin-bottom: 16px;
}

.faq-aside {
  min-width: 0;
  position: sticky;
  top: 84px;
}

.faq-aside .media-figure {
  margin-top: 0;
}

.aside-note {
  margin-top: 18px;
  padding: 16px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
}

.aside-note p {
  font-size: 13px;
  line-height: 1.75;
  color: var(--c-muted);
  margin-bottom: 10px;
}

/* --------------------------------------------------------------------------
   pages  ·  合作接洽
   -------------------------------------------------------------------------- */

.contact-steps-section {
  padding-top: 36px;
  padding-bottom: 12px;
}

.contact-two-col {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.8fr);
  gap: 40px;
  align-items: start;
}

.col-steps,
.col-request-points {
  min-width: 0;
}

.step-list {
  counter-reset: cstep;
  border-top: 1px solid var(--c-border);
}

.step-item {
  position: relative;
  counter-increment: cstep;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--c-border);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: #EDF3F2;
  border: 1px solid var(--c-border);
  font-size: 12px;
  font-weight: 600;
  color: var(--c-primary-dark);
  font-variant-numeric: tabular-nums;
}

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

.step-name {
  font-size: 16px;
  margin-bottom: 4px;
}

.step-desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-muted);
}

.step-meta {
  margin-top: 6px;
  font-size: 13px;
  color: var(--c-accent);
}

.col-request-points {
  padding: 20px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
}

.col-request-points .section-title {
  font-size: 18px;
  margin-bottom: 8px;
}

.point-list {
  margin-top: 4px;
}

.point-item {
  padding: 10px 0;
  border-bottom: 1px dashed var(--c-border);
}

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

.point-name {
  display: block;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 2px;
}

.point-tip {
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-muted);
}

.contact-visual-section {
  padding-top: 20px;
  padding-bottom: 20px;
}

.contact-visual-section .content-figure {
  margin: 0;
}

.contact-reply-section {
  padding-top: 28px;
  padding-bottom: 28px;
}

.narrow-container {
  max-width: 880px;
}

.reply-list {
  border-top: 1px solid var(--c-border);
  margin-top: 8px;
}

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

.reply-name {
  font-size: 16px;
  margin-bottom: 4px;
}

.reply-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-muted);
}

.contact-entries-section {
  padding-top: 20px;
  padding-bottom: 52px;
}

.entry-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 8px;
}

.entry-card {
  padding: 20px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
}

.entry-card:hover {
  border-color: var(--c-border-strong);
}

.entry-title {
  font-size: 16px;
  margin-bottom: 6px;
}

.entry-title a {
  color: var(--c-text);
}

.entry-title a:hover {
  color: var(--c-primary);
}

.entry-desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-muted);
}

/* --------------------------------------------------------------------------
   pages  ·  404
   -------------------------------------------------------------------------- */

.error-main {
  padding: 72px 0 80px;
}

.error-wrap {
  max-width: 640px;
}

.error-code {
  font-size: 13px;
  font-weight: 600;
  color: var(--c-accent);
  margin-bottom: 10px;
}

.error-title {
  font-size: 28px;
  margin-bottom: 12px;
}

.error-lead {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
  margin-bottom: 24px;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

.error-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  padding-top: 20px;
  border-top: 1px solid var(--c-border);
}

.error-links a {
  font-size: 14px;
  color: var(--c-primary);
}

.error-links a:hover {
  color: var(--c-primary-dark);
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1024px) {
  .hero-grid {
    gap: 36px;
  }

  .scene-grid,
  .checklist-grid,
  .contact-two-col {
    gap: 32px;
  }

  .footer-grid {
    gap: 32px;
  }
}

@media (max-width: 960px) {
  .nav-toggle {
    display: inline-flex;
  }

  .primary-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background-color: var(--c-surface);
    border-bottom: 1px solid var(--c-border);
    box-shadow: 0 8px 18px rgba(29, 36, 34, 0.08);
    padding: 8px 24px 16px;
  }

  .site-header {
    position: relative;
  }

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

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

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

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

  .nav-link {
    display: block;
    min-height: 48px;
    padding: 12px 4px 12px 14px;
    border-bottom: 0;
    border-left: 3px solid transparent;
    font-size: 16px;
  }

  .nav-link:hover {
    border-left-color: var(--c-border-strong);
    border-bottom-color: transparent;
  }

  .nav-link.is-current {
    border-left-color: var(--c-primary);
    border-bottom-color: transparent;
    color: var(--c-primary-dark);
  }

  .hero {
    padding: 40px 0 36px;
  }

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

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

  .section {
    padding: 40px 0;
  }

  .scene-grid,
  .checklist-grid,
  .contact-two-col {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

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

  .page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding-top: 24px;
    padding-bottom: 36px;
  }

  .page-body,
  .content-main {
    max-width: none;
  }

  .service-index,
  .content-aside,
  .faq-aside {
    position: static;
  }

  .service-index {
    width: 100%;
  }

  .service-index-list {
    display: flex;
    gap: 0;
    overflow-x: auto;
    scroll-snap-type: x proximity;
    -webkit-overflow-scrolling: touch;
  }

  .service-index-item {
    flex: 0 0 auto;
    border-bottom: 0;
    border-right: 1px solid var(--c-border);
    scroll-snap-align: start;
  }

  .service-index-item:last-child {
    border-right: 0;
  }

  .service-index-link {
    min-width: 190px;
    min-height: 48px;
    border-left: 0;
    border-bottom: 3px solid transparent;
  }

  .service-index-item.is-active .service-index-link {
    border-left: 0;
    border-bottom-color: var(--c-primary);
  }

  .faq-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding-top: 24px;
    padding-bottom: 32px;
  }

  .faq-body {
    max-width: none;
  }

  .reading-body {
    padding-top: 22px;
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
    padding-top: 36px;
  }

  .footer-col-about {
    grid-column: 1 / -1;
  }

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

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

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

@media (max-width: 640px) {
  .container,
  .header-inner,
  .breadcrumb,
  .page-header,
  .page-head,
  .related-links {
    padding-left: 16px;
    padding-right: 16px;
  }

  .primary-nav {
    padding-left: 16px;
    padding-right: 16px;
  }

  .header-inner {
    min-height: 58px;
    gap: 12px;
  }

  .brand-sub {
    display: none;
  }

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

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

  .hero-eyebrow {
    margin-bottom: 8px;
  }

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

  .section-title,
  .section-head h2,
  .checklist-body h2,
  .content-section h2 {
    font-size: 20px;
  }

  .section {
    padding: 32px 0;
  }

  .page-layout {
    padding-top: 20px;
    padding-bottom: 28px;
  }

  /* 表格转条目卡 */
  .table-wrap {
    border: 0;
    background-color: transparent;
    overflow-x: visible;
  }

  .data-table,
  .data-table thead,
  .data-table tbody,
  .data-table tr,
  .data-table td {
    display: block;
    width: 100%;
  }

  .data-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
  }

  .data-table tbody tr {
    margin-bottom: 12px;
    padding: 6px 14px;
    background-color: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
  }

  .data-table tbody tr:last-child {
    margin-bottom: 0;
  }

  .data-table tbody td {
    display: grid;
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 10px;
    padding: 8px 0;
    border-bottom: 1px dashed var(--c-border);
    font-size: 14px;
  }

  .data-table tbody tr td:last-child {
    border-bottom: 0;
  }

  .data-table tbody td::before {
    content: attr(data-label);
    font-size: 12px;
    font-weight: 600;
    color: var(--c-muted);
    line-height: 1.9;
  }

  .table-caption {
    display: block;
    padding: 0 0 10px;
    background-color: transparent;
    border-bottom: 0;
  }

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

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

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

  .timeline-item {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 12px;
  }

  .timeline-list .timeline-item {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 12px;
  }

  .step-item {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 12px;
  }

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

  .error-main {
    padding: 48px 0 56px;
  }

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

  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding-top: 32px;
    padding-bottom: 24px;
  }

  .footer-col-about {
    grid-column: auto;
  }

  .content-figure img,
  .media-figure img {
    aspect-ratio: 16 / 10;
  }
}

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

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