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

:root {
  --paper: #F7F6F3;
  --white: #FFFFFF;
  --ink: #1B1D22;
  --muted: #5A5F68;
  --indigo: #29366B;
  --sand: #C8A27A;
  --line: #E2E0DA;
  --line-strong: #CFCCC3;
  --radius: 3px;
  --radius-lg: 6px;
  --shell: 1160px;
  --gap: 40px;
  --font-sans: "Source Han Sans SC", "Source Han Sans", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
}

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

body.site-body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.85;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--indigo);
  text-decoration: none;
  transition: color .18s ease;
}

a:hover {
  color: #16204A;
}

h1, h2, h3, h4 {
  margin: 0 0 .6em;
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink);
}

p {
  margin: 0 0 1em;
}

ul, ol {
  margin: 0 0 1em;
  padding-left: 1.3em;
}

figure {
  margin: 0;
}

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

button {
  font-family: inherit;
  cursor: pointer;
}

.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: -48px;
  z-index: 100;
  background: var(--indigo);
  color: #fff;
  padding: 10px 18px;
  border-radius: var(--radius);
  font-size: 14px;
  transition: top .18s ease;
}

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

/* ============ 布局：页头 ============ */
.site-header {
  position: relative;
  background: var(--white);
  border-bottom: 1px solid var(--line);
  z-index: 40;
}

.site-nav {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px;
  min-height: 82px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 20px;
}

.nav-group {
  display: flex;
  align-items: center;
  gap: 26px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 15px;
}

.nav-group-left {
  justify-content: flex-start;
}

.nav-group-right {
  justify-content: flex-end;
}

.nav-group li a {
  display: inline-block;
  padding: 6px 0;
  color: var(--ink);
  border-bottom: 2px solid transparent;
  line-height: 1.5;
}

.nav-group li a:hover {
  color: var(--indigo);
  border-bottom-color: var(--sand);
}

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

.brand-mark {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  color: var(--ink);
  text-align: center;
  line-height: 1.25;
}

.brand-mark:hover {
  color: var(--indigo);
}

.brand-name {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: .06em;
}

.brand-sub {
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--muted);
  margin-top: 4px;
  text-transform: uppercase;
}

.nav-toggle {
  display: none;
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--white);
  padding: 0;
  align-items: center;
  justify-content: center;
}

.nav-toggle::before,
.nav-toggle::after,
.nav-toggle span {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
  position: relative;
}

.nav-toggle::before {
  position: absolute;
  top: 15px;
}

.nav-toggle span {
  position: absolute;
  top: 21px;
}

.nav-toggle::after {
  position: absolute;
  top: 27px;
}

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

.inner-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 26px 24px 72px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 22px;
}

.breadcrumb a {
  color: var(--muted);
  border-bottom: 1px solid transparent;
}

.breadcrumb a:hover {
  color: var(--indigo);
  border-bottom-color: var(--sand);
}

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

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

.page-header {
  margin-bottom: 14px;
}

.page-title {
  font-size: clamp(28px, 3.2vw, 38px);
  font-weight: 600;
  line-height: 1.3;
  color: var(--ink);
  margin: 0;
}

.inner-main > .page-title,
.inner-main > section.page-title {
  margin: 0 0 10px;
}

section.page-title {
  padding-bottom: 26px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 40px;
}

.page-lead {
  font-size: 17px;
  color: var(--ink);
  line-height: 1.8;
  max-width: 74ch;
  margin: 0 0 10px;
}

.page-meta {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--muted);
  margin: 0;
}

.page-kicker {
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--sand);
  text-transform: uppercase;
  margin: 0 0 8px;
}

.page-note {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
}

/* 内页双栏骨架：主内容在前，aside 在后 */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: var(--gap);
  align-items: start;
}

.page-layout > .layout-main,
.page-layout > .page-primary,
.page-layout > .page-content,
.page-layout > .content-main {
  min-width: 0;
}

.page-layout > .layout-aside,
.page-layout > .page-aside,
.page-layout > .content-aside {
  min-width: 0;
}

/* ============ 组件：按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 11px 26px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: background .18s ease, color .18s ease, border-color .18s ease;
  line-height: 1.4;
}

.btn-primary {
  background: var(--indigo);
  color: #fff;
  border-color: var(--indigo);
}

.btn-primary:hover {
  background: #1C274F;
  border-color: #1C274F;
  color: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--indigo);
  border-color: var(--indigo);
}

.btn-ghost:hover {
  background: #EDEBE4;
  color: var(--indigo);
}

/* ============ 组件：区块标题 ============ */
.section-head {
  margin-bottom: 26px;
  max-width: 74ch;
}

.section-head h2 {
  font-size: 24px;
  margin: 0 0 8px;
}

.section-lead {
  font-size: 15px;
  color: var(--muted);
  margin: 0;
  line-height: 1.75;
}

.section-intro {
  font-size: 15px;
  color: var(--muted);
  margin: 0 0 20px;
  max-width: 72ch;
}

.section-title {
  font-size: 22px;
  margin: 0 0 10px;
}

/* ============ 组件：图片与图注 ============ */
.hero-figure,
.content-media,
.group-media,
.item-thumb,
.media-figure,
.stage-figure,
.boundary-figure,
.followup-figure,
.page-media {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--white);
  overflow: hidden;
}

.hero-figure img,
.content-media img,
.group-media img,
.item-thumb img,
.media-figure img,
.stage-figure img,
.boundary-figure img,
.followup-figure img,
.page-media img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

figcaption {
  font-size: 13px;
  color: var(--muted);
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  line-height: 1.6;
  background: var(--white);
}

/* ============ 组件：表格 ============ */
.table-wrap,
.table-scroll {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--white);
}

.field-table,
.stage-fields {
  width: 100%;
  min-width: 560px;
  font-size: 15px;
}

.field-table caption,
.stage-fields caption {
  text-align: left;
  font-size: 13px;
  color: var(--muted);
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
}

.field-table thead th,
.stage-fields thead th {
  text-align: left;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--muted);
  background: #F2F0EA;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
}

.field-table tbody th,
.field-table tbody td,
.stage-fields tbody th,
.stage-fields tbody td {
  text-align: left;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  line-height: 1.7;
}

.field-table tbody th,
.stage-fields tbody th {
  font-weight: 600;
  color: var(--ink);
  background: #FBFAF7;
}

.field-table tbody tr:last-child th,
.field-table tbody tr:last-child td,
.stage-fields tbody tr:last-child th,
.stage-fields tbody tr:last-child td {
  border-bottom: 0;
}

/* ============ 组件：侧栏 ============ */
.aside-block {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 22px 22px 20px;
  margin-bottom: 24px;
}

.aside-title {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--ink);
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.aside-nav,
.aside-links,
.related-list {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 14px;
}

.aside-nav li,
.aside-links li,
.related-list li {
  border-bottom: 1px solid var(--line);
}

.aside-nav li:last-child,
.aside-links li:last-child,
.related-list li:last-child {
  border-bottom: 0;
}

.aside-nav li a,
.aside-links li a,
.related-list li a {
  display: block;
  padding: 9px 0;
  color: var(--ink);
  line-height: 1.6;
}

.aside-nav li a:hover,
.aside-links li a:hover,
.related-list li a:hover {
  color: var(--indigo);
}

.aside-links li p,
.related-list li span {
  display: block;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
  margin: 0 0 10px;
}

.aside-note {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.aside-sub {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--sand);
  margin: 12px 0 4px;
}

.aside-sub:first-of-type {
  margin-top: 0;
}

/* ============ 布局：页脚 ============ */
.site-footer {
  background: var(--ink);
  color: #C9CBD2;
  margin-top: 40px;
}

.footer-grid {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 52px 24px 34px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr)) minmax(0, 1.3fr);
  gap: 34px;
}

.footer-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .1em;
  color: #fff;
  margin: 0 0 14px;
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 14px;
}

.footer-col ul li {
  margin-bottom: 9px;
}

.footer-col ul li a {
  color: #C9CBD2;
  line-height: 1.6;
}

.footer-col ul li a:hover {
  color: var(--sand);
}

.footer-about p {
  font-size: 14px;
  line-height: 1.8;
  margin: 0 0 12px;
  color: #B7BAC2;
}

.footer-home a {
  color: var(--sand);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .12);
}

.footer-bottom p {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 16px 24px;
  font-size: 13px;
  color: #8F939D;
  letter-spacing: .03em;
}

/* ============ 组件：返回顶部 ============ */
.back-to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  border: 1px solid var(--line-strong);
  background: var(--white);
  color: var(--indigo);
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity .2s ease, transform .2s ease, visibility .2s;
  z-index: 60;
}

.back-to-top::before {
  content: "↑";
  font-size: 18px;
  line-height: 1;
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ============ 首页 ============ */
.home-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px 20px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 56px;
  align-items: start;
  padding: 64px 0 56px;
  border-bottom: 1px solid var(--line);
}

.hero-text {
  max-width: 560px;
}

.eyebrow {
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--sand);
  margin: 0 0 16px;
  text-transform: uppercase;
}

.hero-text h1 {
  font-size: clamp(30px, 3.6vw, 42px);
  line-height: 1.28;
  margin: 0 0 20px;
  font-weight: 600;
}

.hero-lead {
  font-size: 17px;
  line-height: 1.85;
  color: var(--muted);
  margin: 0 0 28px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.hero-visual {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.hero-figure {
  margin: 0;
}

.brand-swatch {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--white);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.swatch-row {
  display: flex;
  gap: 10px;
  align-items: center;
}

.swatch {
  flex: 1;
  height: 30px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.swatch:nth-child(1) { background: var(--indigo); }
.swatch:nth-child(2) { background: var(--sand); }
.swatch:nth-child(3) { background: var(--ink); }

.swatch-row-type {
  align-items: baseline;
  gap: 18px;
  padding-top: 4px;
  border-top: 1px solid var(--line);
}

.type-sample {
  color: var(--muted);
  line-height: 1.3;
}

.type-sample-h1 { font-size: 22px; font-weight: 600; color: var(--ink); }
.type-sample-body { font-size: 15px; }
.type-sample-note { font-size: 12px; letter-spacing: .06em; }

.content-media-primary {
  margin: 0;
}

/* 任务目录横条 */
.task-directory {
  padding: 56px 0 48px;
  border-bottom: 1px solid var(--line);
}

.task-strip {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.task-item {
  background: var(--white);
  margin: 0;
}

.task-item a {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 20px;
  height: 100%;
  color: var(--ink);
}

.task-item a:hover {
  background: #FBFAF7;
  color: var(--indigo);
}

.task-name {
  font-size: 17px;
  font-weight: 600;
}

.task-desc {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.65;
  flex: 1;
}

.task-arrow {
  font-size: 16px;
  color: var(--sand);
}

/* 近期更新 */
.updates {
  padding: 56px 0 48px;
  border-bottom: 1px solid var(--line);
}

.updates-grid {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

.updates-calendar {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--white);
  padding: 20px;
}

.calendar-month {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--indigo);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.calendar-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 4px;
}

.calendar-cell {
  aspect-ratio: 1 / 1;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  background: #FBFAF7;
}

.cell-day {
  font-size: 12px;
  color: var(--muted);
  line-height: 1;
}

.cell-mark {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--line-strong);
}

.calendar-cell.is-active {
  background: var(--white);
  border-color: var(--sand);
}

.calendar-cell.is-active .cell-day {
  color: var(--ink);
  font-weight: 600;
}

.calendar-cell.is-active .cell-mark {
  background: var(--sand);
}

.calendar-note {
  font-size: 12px;
  color: var(--muted);
  margin: 14px 0 0;
  line-height: 1.7;
}

.updates-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.update-row {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.update-date {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: .03em;
  padding-top: 2px;
}

.update-body h3 {
  font-size: 16px;
  margin: 0 0 4px;
}

.update-body p {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
  line-height: 1.7;
}

/* 交付阶段 */
.delivery-stages {
  padding: 56px 0 48px;
  border-bottom: 1px solid var(--line);
}

.stage-strip {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.stage-item {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 22px 20px;
  margin: 0;
}

.stage-item .stage-no {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--sand);
  margin-bottom: 10px;
}

.stage-item h3 {
  font-size: 17px;
  margin: 0 0 8px;
}

.stage-item p {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
  line-height: 1.7;
}

.stage-more {
  margin: 22px 0 0;
  font-size: 14px;
}

.stage-more a {
  border-bottom: 1px solid var(--sand);
  padding-bottom: 2px;
}

/* 能力对照表 */
.capability-table {
  padding: 56px 0 48px;
  border-bottom: 1px solid var(--line);
}

.table-more {
  margin: 18px 0 0;
  font-size: 14px;
}

.table-more a {
  border-bottom: 1px solid var(--sand);
  padding-bottom: 2px;
}

/* 常见疑问入口 */
.faq-entry {
  padding: 56px 0 48px;
  border-bottom: 1px solid var(--line);
}

.faq-entry-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.faq-entry-grid li {
  margin: 0;
  background: var(--white);
}

.faq-entry-grid li a {
  display: block;
  height: 100%;
  padding: 22px 22px;
  color: var(--ink);
}

.faq-entry-grid li a:hover {
  background: #FBFAF7;
  color: var(--indigo);
}

.faq-entry-grid li a h3 {
  font-size: 16px;
  margin: 0 0 6px;
}

.faq-entry-grid li a p {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
  line-height: 1.7;
}

/* 接洽提示条 */
.contact-strip {
  margin: 56px 0 8px;
  background: #EFEDE6;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 34px 36px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
}

.strip-text h2 {
  font-size: 22px;
  margin: 0 0 8px;
}

.strip-text p {
  font-size: 15px;
  color: var(--muted);
  margin: 0;
  line-height: 1.75;
  max-width: 60ch;
}

/* 相关内容导航 */
.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
  padding: 26px 0 34px;
  font-size: 14px;
}

.related-links-label {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}

.related-links-item {
  color: var(--indigo);
  border-bottom: 1px solid transparent;
}

.related-links-item:hover {
  border-bottom-color: var(--sand);
}

/* ============ 内页：服务目录 ============ */
.catalog-intro {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 26px 26px 22px;
  margin-bottom: 36px;
}

.catalog-intro h2 {
  font-size: 20px;
  margin: 0 0 12px;
}

.catalog-intro p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.8;
}

.group-index {
  list-style: none;
  margin: 18px 0 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 26px;
  font-size: 14px;
}

.group-index li a {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 6px 0;
  color: var(--ink);
  border-bottom: 1px dashed var(--line);
}

.group-index li a:hover {
  color: var(--indigo);
  border-bottom-color: var(--sand);
}

.catalog-group {
  margin-bottom: 44px;
  padding-bottom: 8px;
}

.group-head {
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-strong);
}

.group-head h2 {
  font-size: 22px;
  margin: 0 0 6px;
}

.group-head .group-no {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--sand);
  margin-bottom: 8px;
}

.group-head p {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
  line-height: 1.75;
}

.group-head .group-count {
  font-size: 13px;
  color: var(--muted);
  margin: 4px 0 0;
}

.group-media {
  margin: 0 0 22px;
}

.item-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.item-row {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr) 200px;
  gap: 22px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}

.item-id {
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--sand);
  padding-top: 3px;
}

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

.item-body h3 {
  font-size: 16px;
  margin: 0 0 6px;
}

.item-body .item-scene {
  font-size: 14px;
  color: var(--ink);
  margin: 0 0 6px;
  line-height: 1.7;
}

.item-body .item-coop {
  font-size: 13px;
  color: var(--muted);
  margin: 0;
  line-height: 1.7;
}

.item-output {
  font-size: 13px;
  color: var(--muted);
  margin: 0;
  padding-top: 3px;
  line-height: 1.7;
  border-left: 2px solid var(--sand);
  padding-left: 12px;
}

.item-list-visual .item-row {
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 22px;
}

.item-thumb {
  margin: 0;
}

.item-thumb img {
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

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

.retainer-item {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 22px 22px 18px;
}

.retainer-item h3 {
  font-size: 16px;
  margin: 0 0 12px;
}

.retainer-fields {
  margin: 0;
  font-size: 14px;
}

.retainer-fields dt {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
  margin-top: 10px;
}

.retainer-fields dt:first-child {
  margin-top: 0;
}

.retainer-fields dd {
  margin: 2px 0 0;
  color: var(--ink);
  line-height: 1.7;
}

/* ============ 内页：交付流程 ============ */
.page-primary > section {
  margin-bottom: 44px;
}

.stage-table h2,
.stage-notes h2,
.stage-cautions h2 {
  font-size: 22px;
  margin: 0 0 8px;
}

.stage-figure {
  margin: 0 0 22px;
}

.stage-fields {
  min-width: 620px;
}

.stage-fields .stage-no {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--sand);
  margin-right: 6px;
}

.note-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.note-item {
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 3px solid var(--sand);
  border-radius: var(--radius);
  padding: 18px 22px;
}

.note-item h3 {
  font-size: 16px;
  margin: 0 0 6px;
}

.note-item p {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
  line-height: 1.75;
}

.caution-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: caution;
}

.caution-list li {
  counter-increment: caution;
  position: relative;
  padding: 14px 0 14px 42px;
  border-bottom: 1px solid var(--line);
}

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

.caution-list li::before {
  content: counter(caution, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 14px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--sand);
}

.caution-list li h3 {
  font-size: 15px;
  margin: 0 0 4px;
}

.caution-list li p {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
  line-height: 1.75;
}

/* ============ 内页：能力说明 ============ */
.content-block {
  margin-bottom: 44px;
}

.content-block h2 {
  font-size: 22px;
  margin: 0 0 10px;
}

.content-block > p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.8;
  max-width: 72ch;
}

.media-figure {
  margin: 0 0 22px;
}

.media-figure img {
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.role-table {
  min-width: 560px;
}

.block-note {
  font-size: 14px;
  color: var(--muted);
  margin: 16px 0 0;
  line-height: 1.75;
}

.block-note a {
  border-bottom: 1px solid var(--sand);
  padding-bottom: 1px;
}

.standard-item {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
  margin-bottom: 16px;
}

.standard-item h3 {
  font-size: 16px;
  margin: 0 0 6px;
}

.standard-item > p {
  font-size: 14px;
  color: var(--muted);
  margin: 0 0 10px;
  line-height: 1.75;
}

.check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 20px;
  font-size: 14px;
}

.check-list li {
  position: relative;
  padding-left: 18px;
  line-height: 1.7;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 7px;
  height: 7px;
  border-radius: 1px;
  background: var(--sand);
}

.point-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.point-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.point-list li strong {
  display: inline-block;
  color: var(--ink);
  font-weight: 600;
  margin-right: 8px;
}

/* ============ 内页：服务边界 ============ */
.boundary-section {
  margin-bottom: 44px;
}

.boundary-section > p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.8;
  max-width: 72ch;
}

.clause-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: clause;
}

.clause-item {
  counter-increment: clause;
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}

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

.clause-no {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--sand);
  padding-top: 2px;
}

.clause-body {
  min-width: 0;
  font-size: 15px;
  line-height: 1.8;
}

.clause-body h3 {
  font-size: 15px;
  margin: 0 0 4px;
}

.clause-body p {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
  line-height: 1.75;
}

.clause-list-excluded .clause-body {
  color: var(--ink);
}

.clause-list-excluded .clause-no {
  color: var(--muted);
}

.boundary-figure {
  margin: 8px 0 40px;
}

.boundary-figure img {
  aspect-ratio: 16 / 6;
  object-fit: cover;
}

.term-list {
  margin: 0;
  font-size: 14px;
}

.term-list dt {
  font-weight: 600;
  color: var(--ink);
  margin-top: 12px;
}

.term-list dt:first-child {
  margin-top: 0;
}

.term-list dd {
  margin: 2px 0 0;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

/* ============ 内页：常见疑问 ============ */
.page-media {
  margin: 0 0 34px;
}

.page-media img {
  aspect-ratio: 21 / 6;
  object-fit: cover;
}

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

.faq-group .group-head .group-index {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--sand);
  margin-bottom: 8px;
}

.faq-group .group-head .group-note {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
  line-height: 1.75;
}

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

.faq-item summary {
  list-style: none;
  cursor: pointer;
  position: relative;
  padding: 16px 40px 16px 0;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.65;
  color: var(--ink);
  transition: color .18s ease;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  font-weight: 400;
  color: var(--sand);
  line-height: 1;
}

.faq-item[open] summary {
  color: var(--indigo);
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item summary:hover {
  color: var(--indigo);
}

.faq-answer {
  padding: 0 40px 18px 0;
}

.faq-answer p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.85;
  margin: 0;
}

.faq-note {
  font-size: 14px;
  color: var(--muted);
  margin: 18px 0 0;
}

.faq-note a {
  border-bottom: 1px solid var(--sand);
}

/* ============ 内页：接洽说明 ============ */
.page-primary > .checklist-section,
.page-primary > .example-section,
.page-primary > .followup-section {
  margin-bottom: 44px;
}

.checklist-section h2,
.example-section h2,
.followup-section h2 {
  font-size: 22px;
  margin: 0 0 8px;
}

.checklist-item {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin-bottom: 14px;
}

.checklist-name {
  font-size: 16px;
  margin: 0 0 6px;
}

.checklist-role {
  font-size: 14px;
  color: var(--ink);
  margin: 0 0 6px;
  line-height: 1.7;
}

.checklist-tip {
  font-size: 13px;
  color: var(--muted);
  margin: 0;
  line-height: 1.7;
  padding-top: 8px;
  border-top: 1px dashed var(--line);
}

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

.example-block {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--white);
  padding: 20px 22px;
}

.example-weak {
  border-top: 3px solid var(--line-strong);
}

.example-strong {
  border-top: 3px solid var(--sand);
}

.example-title {
  font-size: 15px;
  margin: 0 0 12px;
}

.example-lines {
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
  font-size: 14px;
}

.example-lines li {
  padding: 7px 0;
  border-bottom: 1px dashed var(--line);
  line-height: 1.7;
}

.example-lines li:last-child {
  border-bottom: 0;
}

.example-comment {
  font-size: 13px;
  color: var(--muted);
  margin: 0;
  line-height: 1.7;
}

.followup-figure {
  margin: 0 0 22px;
}

.followup-figure img {
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.followup-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: followup;
  border-top: 1px solid var(--line);
}

.followup-step {
  counter-increment: followup;
  position: relative;
  padding: 16px 0 16px 46px;
  border-bottom: 1px solid var(--line);
}

.followup-step::before {
  content: counter(followup, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 16px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--sand);
}

.step-name {
  font-size: 16px;
  margin: 0 0 4px;
}

.followup-step p {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
  line-height: 1.75;
}

.followup-tail {
  font-size: 14px;
  color: var(--muted);
  margin: 18px 0 0;
}

.followup-tail a {
  border-bottom: 1px solid var(--sand);
  margin-right: 16px;
}

/* ============ 404 ============ */
.error-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 72px 24px 96px;
}

.error-panel {
  max-width: 620px;
  margin: 0 auto;
  text-align: center;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 48px 36px;
}

.error-code {
  font-size: 13px;
  letter-spacing: .2em;
  color: var(--sand);
  margin: 0 0 12px;
}

.error-panel h1 {
  font-size: clamp(26px, 3vw, 34px);
  margin: 0 0 14px;
}

.error-lead {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.8;
  margin: 0 0 24px;
}

.error-links {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 26px;
  font-size: 15px;
}

.error-links li a {
  border-bottom: 1px solid var(--sand);
  padding-bottom: 2px;
}

.error-action {
  margin: 0;
}

.btn-home {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 11px 28px;
  background: var(--indigo);
  color: #fff;
  border-radius: var(--radius);
  font-size: 15px;
}

.btn-home:hover {
  background: #1C274F;
  color: #fff;
}

/* ============ 响应式：900px ============ */
@media (max-width: 900px) {
  .site-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    padding: 12px 64px 14px 18px;
    min-height: 0;
  }

  .site-nav .brand-mark {
    order: 1;
    padding: 6px 0;
  }

  .nav-toggle {
    display: flex;
    right: 14px;
  }

  .nav-group {
    order: 2;
    flex-basis: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height .26s ease;
  }

  .site-nav.is-open .nav-group {
    max-height: 520px;
    margin-top: 10px;
    border-top: 1px solid var(--line);
  }

  .nav-group-left,
  .nav-group-right {
    justify-content: flex-start;
  }

  .nav-group li a {
    display: block;
    padding: 12px 4px;
    border-bottom: 1px solid var(--line);
    font-size: 15px;
  }

  .nav-group li:last-child a {
    border-bottom: 0;
  }

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

  .inner-main {
    padding: 20px 20px 56px;
  }

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

  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 34px;
    padding: 40px 0 40px;
  }

  .hero-text {
    max-width: none;
  }

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

  .updates-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 30px;
  }

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

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

  .contact-strip {
    grid-template-columns: minmax(0, 1fr);
    padding: 28px 24px;
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
    padding: 40px 20px 28px;
  }

  .item-row {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 8px 16px;
  }

  .item-output {
    grid-column: 2 / -1;
    border-left: 0;
    padding-left: 0;
    border-top: 1px dashed var(--line);
    padding-top: 8px;
  }

  .item-list-visual .item-row {
    grid-template-columns: 120px minmax(0, 1fr);
  }

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

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

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

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

  .page-media img {
    aspect-ratio: 16 / 7;
  }

  .error-main {
    padding: 44px 20px 64px;
  }

  .error-panel {
    padding: 34px 22px;
  }
}

/* ============ 响应式：620px ============ */
@media (max-width: 620px) {
  body.site-body {
    font-size: 15px;
  }

  .site-nav {
    padding-right: 60px;
  }

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

  .brand-sub {
    font-size: 10px;
    letter-spacing: .16em;
  }

  .inner-main {
    padding: 16px 16px 48px;
  }

  .home-main {
    padding: 0 16px 12px;
  }

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

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

  section.page-title {
    padding-bottom: 20px;
    margin-bottom: 28px;
  }

  .hero {
    padding: 30px 0 32px;
  }

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

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

  .hero-actions {
    gap: 10px;
  }

  .hero-actions .btn {
    flex: 1 1 auto;
    min-width: 140px;
  }

  .brand-swatch {
    padding: 14px;
  }

  .swatch-row-type {
    flex-wrap: wrap;
    gap: 10px 16px;
  }

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

  .task-item a {
    padding: 16px 16px;
  }

  .updates-calendar {
    padding: 14px;
  }

  .calendar-grid {
    gap: 3px;
  }

  .update-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
    padding: 14px 0;
  }

  .stage-strip {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .stage-item {
    padding: 18px 16px;
  }

  .field-table,
  .stage-fields {
    min-width: 480px;
    font-size: 14px;
  }

  .field-table thead th,
  .stage-fields thead th,
  .field-table tbody th,
  .field-table tbody td,
  .stage-fields tbody th,
  .stage-fields tbody td {
    padding: 10px 12px;
  }

  .contact-strip {
    margin-top: 36px;
    padding: 22px 18px;
  }

  .strip-text h2 {
    font-size: 19px;
  }

  .faq-entry-grid li a {
    padding: 18px 16px;
  }

  .related-links {
    gap: 8px 16px;
    padding: 20px 0 26px;
  }

  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 32px 16px 24px;
  }

  .footer-bottom p {
    padding: 14px 16px;
  }

  .aside-block {
    padding: 18px 16px 16px;
  }

  .catalog-intro {
    padding: 20px 16px 18px;
  }

  .group-head h2 {
    font-size: 19px;
  }

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

  .item-thumb img {
    aspect-ratio: 16 / 9;
  }

  .clause-item {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 10px;
  }

  .checklist-item {
    padding: 16px 16px;
  }

  .example-block {
    padding: 16px 16px;
  }

  .note-item {
    padding: 16px 16px;
  }

  .standard-item {
    padding: 16px 16px;
  }

  .faq-item summary {
    padding: 14px 32px 14px 0;
    font-size: 15px;
  }

  .faq-answer {
    padding: 0 0 14px;
  }

  .page-media {
    margin-bottom: 24px;
  }

  .page-media img {
    aspect-ratio: 16 / 9;
  }

  .media-figure img,
  .followup-figure img {
    aspect-ratio: 16 / 9;
  }

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

  .error-panel {
    padding: 28px 16px;
  }

  .error-links {
    flex-direction: column;
    align-items: center;
    gap: 10px;
  }

  .back-to-top {
    right: 14px;
    bottom: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}