/* ==========================================================================
   99re 企业服务官网 · 全站样式表
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base · 变量与基础排版
   -------------------------------------------------------------------------- */

:root {
  --color-primary: #1F3A5F;
  --color-primary-soft: #2C4E7A;
  --color-secondary: #2E7D6B;
  --color-accent: #C97B2B;
  --color-danger: #A33A2E;
  --color-bg: #F5F6F3;
  --color-surface: #FFFFFF;
  --color-text: #1B2026;
  --color-text-muted: #5A6472;
  --color-border: #DCE0DA;
  --color-border-strong: #C3CAC0;

  --shell-max: 1120px;
  --shell-wide: 1000px;
  --reading-width: 760px;
  --sidebar-width: 260px;

  --pad-desktop: 32px;
  --pad-tablet: 24px;
  --pad-mobile: 16px;

  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  --font-sans: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "Menlo", "Consolas", monospace;

  --shadow-card: 0 1px 2px rgba(27, 32, 38, 0.04);
  --shadow-raised: 0 4px 14px rgba(27, 32, 38, 0.08);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  font-weight: 400;
}

h1, h2, h3, h4 {
  margin: 0;
  color: var(--color-primary);
  font-weight: 600;
}

h2 {
  font-size: 22px;
  line-height: 1.4;
}

h3 {
  font-size: 18px;
  line-height: 1.5;
}

p {
  margin: 0;
}

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

dl, dd, dt, figure, figcaption {
  margin: 0;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

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

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

strong {
  font-weight: 600;
}

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

.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;
}

/* --------------------------------------------------------------------------
   layout · 全站外壳：页头 / 主导航 / 主容器 / 面包屑 / 页脚
   -------------------------------------------------------------------------- */

.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* 页头 ---------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 14px var(--pad-desktop);
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex-shrink: 0;
  color: var(--color-primary);
}

.brand-name {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-primary);
}

.brand-tag {
  font-size: 12px;
  line-height: 1.4;
  color: var(--color-text-muted);
}

.brand:hover .brand-name {
  color: var(--color-secondary);
}

/* 主导航 -------------------------------------------------------------- */

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 20px;
}

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

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

.nav-link:hover {
  color: var(--color-secondary);
}

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

.nav-cta {
  display: inline-block;
  padding: 8px 18px;
  font-size: 15px;
  line-height: 1.5;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-md);
  white-space: nowrap;
}

.nav-cta:hover {
  background-color: var(--color-primary);
  color: #FFFFFF;
}

.nav-cta.is-current {
  background-color: var(--color-primary);
  color: #FFFFFF;
}

/* 移动端汉堡按钮 ------------------------------------------------------ */

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  padding: 0;
  background-color: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-primary);
}

/* 主内容区 ------------------------------------------------------------ */

.site-main {
  flex: 1 0 auto;
}

.inner-main {
  display: block;
}

.container,
.content-shell,
.section-inner,
.page-head-inner,
.page-hero-inner,
.section-nav-inner,
.footer-inner,
.anchor-bar,
.stage-nav,
.scenario-table-section,
.scenario-guide,
.scenario-compare,
.page-related,
.section-links,
.boundary-block {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding-left: var(--pad-desktop);
  padding-right: var(--pad-desktop);
}

/* 面包屑与页面标题区 -------------------------------------------------- */

.breadcrumb {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 20px var(--pad-desktop) 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

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

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

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

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

.page-header {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 14px var(--pad-desktop) 0;
}

.page-title {
  font-size: clamp(26px, 4vw, 36px);
  line-height: 1.35;
  font-weight: 600;
  color: var(--color-primary);
}

.page-head,
.page-hero {
  padding-top: 16px;
  padding-bottom: 0;
}

.page-lead,
.page-hero-desc {
  max-width: var(--reading-width);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
}

/* 页面关键数据字段 ---------------------------------------------------- */

.page-meta,
.page-facts {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 36px;
}

.page-meta-item,
.page-facts .fact,
.page-facts .fact-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 140px;
}

.page-meta-item dt,
.page-facts dt {
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-text-muted);
  font-weight: 500;
}

.page-meta-item dd,
.page-facts dd {
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-primary);
  font-weight: 600;
}

/* 页脚 ---------------------------------------------------------------- */

.site-footer {
  margin-top: 64px;
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  padding-top: 40px;
  padding-bottom: 32px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
}

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

.footer-title {
  font-size: 15px;
  line-height: 1.5;
  color: var(--color-primary);
  margin-bottom: 14px;
}

.footer-about {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-muted);
  margin-bottom: 14px;
}

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

.footer-list a {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-muted);
  display: inline-block;
  padding: 2px 0;
}

.footer-list a:hover {
  color: var(--color-secondary);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
}

.footer-bottom p {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 16px var(--pad-desktop);
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-text-muted);
}

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

/* 按钮 ---------------------------------------------------------------- */

.btn {
  display: inline-block;
  padding: 11px 24px;
  font-size: 15px;
  line-height: 1.5;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  text-align: center;
}

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

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

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

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

/* 文本链接 ------------------------------------------------------------ */

.text-link {
  display: inline-block;
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-secondary);
  border-bottom: 1px solid var(--color-border-strong);
  padding-bottom: 1px;
}

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

/* 通用 section -------------------------------------------------------- */

.section {
  padding-top: 56px;
}

.section-head {
  max-width: var(--reading-width);
  margin-bottom: 24px;
}

.section-title {
  font-size: 22px;
  line-height: 1.4;
  color: var(--color-primary);
}

.section-desc,
.section-lead,
.section-note {
  margin-top: 8px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-muted);
}

.section-more {
  margin-top: 20px;
  font-size: 15px;
}

/* 锚点筛选条 ---------------------------------------------------------- */

.anchor-bar {
  margin-top: 20px;
}

.anchor-nav,
.anchor-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.anchor-nav .anchor-link,
.anchor-list a {
  display: inline-block;
  padding: 7px 14px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.anchor-nav .anchor-link:hover,
.anchor-list a:hover {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
}

/* 折叠问答 ------------------------------------------------------------ */

.faq-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  transition: border-color 0.2s ease;
}

.faq-item:hover {
  border-color: var(--color-border-strong);
}

.faq-item summary,
.faq-item .faq-question {
  position: relative;
  display: block;
  padding: 14px 44px 14px 18px;
  font-size: 16px;
  line-height: 1.6;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
}

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

.faq-item summary::after,
.faq-item .faq-question::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px;
  line-height: 1;
  color: var(--color-accent);
}

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

.faq-answer {
  padding: 14px 18px 16px;
  border-top: 1px solid var(--color-border);
}

.faq-answer p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
}

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

.faq-answer a {
  color: var(--color-secondary);
  border-bottom: 1px solid var(--color-border-strong);
}

/* 相关入口列表 -------------------------------------------------------- */

.related-list,
.entry-list,
.section-links-list,
.section-nav-list,
.page-foot-list,
.fallback-links,
.error-entry-list,
.compare-picker-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.related-item,
.section-link-item,
.entry-list li,
.section-nav-list li,
.page-foot-list li,
.fallback-links li,
.error-entry-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}

.related-item a,
.section-link,
.entry-list a,
.section-nav-list a,
.page-foot-list a,
.fallback-links a,
.error-entry-list a {
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-primary);
}

.related-item a:hover,
.section-link:hover,
.entry-list a:hover,
.section-nav-list a:hover,
.page-foot-list a:hover,
.fallback-links a:hover,
.error-entry-list a:hover {
  color: var(--color-secondary);
}

.related-note,
.section-link-note,
.entry-list span {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-muted);
}

/* 图片容器 ------------------------------------------------------------ */

figure {
  overflow: hidden;
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
}

figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

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

/* 首屏定位区 ---------------------------------------------------------- */

.hero {
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-surface);
}

.hero-inner {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 48px var(--pad-desktop);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 420px);
  gap: 40px;
  align-items: start;
}

.hero-eyebrow {
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-secondary);
  font-weight: 500;
  margin-bottom: 12px;
}

.hero-inner h1 {
  max-width: 620px;
  font-size: clamp(26px, 4vw, 36px);
  line-height: 1.35;
  font-weight: 600;
  color: var(--color-primary);
}

.hero-lead {
  max-width: 600px;
  margin-top: 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
}

.hero-points {
  margin-top: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 600px;
}

.hero-points li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
}

.hero-points li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 12px;
  width: 6px;
  height: 6px;
  background-color: var(--color-secondary);
  border-radius: 50%;
}

.hero-points strong {
  color: var(--color-primary);
}

.hero-actions {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-figure {
  margin: 0;
}

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

/* 服务能力分区总览 ---------------------------------------------------- */

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

.capability-card {
  display: flex;
  flex-direction: column;
  padding: 22px 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.capability-card:hover {
  border-color: var(--color-border-strong);
  transform: translateY(-2px);
}

.capability-index {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  color: var(--color-secondary);
  margin-bottom: 8px;
}

.capability-name {
  font-size: 18px;
  line-height: 1.5;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.capability-meta {
  margin-bottom: 16px;
}

.capability-meta dt {
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-text-muted);
  font-weight: 500;
}

.capability-meta dd {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: 10px;
}

.capability-meta dd:last-child {
  margin-bottom: 0;
}

.card-link {
  margin-top: auto;
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-secondary);
  border-bottom: 1px solid var(--color-border-strong);
  align-self: flex-start;
  padding-bottom: 1px;
}

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

/* 合作流程四阶段 ------------------------------------------------------ */

.section-journey {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 56px;
}

.journey-columns {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.journey-col {
  display: flex;
  flex-direction: column;
  padding: 20px 18px;
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-secondary);
  border-radius: var(--radius-md);
  background-color: var(--color-bg);
}

.journey-step {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  color: var(--color-secondary);
  margin-bottom: 8px;
}

.journey-name {
  font-size: 18px;
  line-height: 1.5;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.journey-output {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: 12px;
}

.journey-coop {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-muted);
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
}

/* 业务场景摘要 -------------------------------------------------------- */

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

.scenario-col {
  display: flex;
  flex-direction: column;
  padding: 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.scenario-col:hover {
  border-color: var(--color-border-strong);
  transform: translateY(-2px);
}

.scenario-col .scenario-figure {
  margin: 0 0 16px;
  border: 1px solid var(--color-border);
}

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

.scenario-name {
  font-size: 18px;
  line-height: 1.5;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.scenario-feature {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: 10px;
}

.scenario-relate {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-muted);
  padding-top: 10px;
  border-top: 1px solid var(--color-border);
}

/* 交付标准摘要 -------------------------------------------------------- */

.section-standards {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 56px;
}

.section-standards .standards-summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 360px);
  gap: 40px;
  align-items: start;
}

.standards-list {
  counter-reset: standard-counter;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.standards-list li {
  position: relative;
  counter-increment: standard-counter;
  padding-left: 40px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
}

.standards-list li::before {
  content: counter(standard-counter, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-primary);
  font-weight: 600;
}

.standards-list strong {
  color: var(--color-primary);
}

.standards-aside {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.standards-aside .standards-figure {
  margin: 0;
}

.standards-aside .standards-figure img {
  aspect-ratio: 3 / 2;
}

.standards-note {
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text-muted);
  padding: 14px 16px;
  background-color: var(--color-bg);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
}

/* 常见问题摘要 -------------------------------------------------------- */

.faq-list {
  max-width: var(--reading-width);
}

/* 合作洽谈入口区 ------------------------------------------------------ */

.section-contact {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding-bottom: 56px;
}

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

.contact-step {
  padding: 20px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.contact-step-name {
  font-size: 18px;
  line-height: 1.5;
  color: var(--color-primary);
  margin-bottom: 10px;
}

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

.contact-actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* --------------------------------------------------------------------------
   pages · 服务能力（capability）
   -------------------------------------------------------------------------- */

.page-layout {
  padding-top: 32px;
}

/* 侧栏在左：主内容容器在前，aside 在后 */
.layout-shell.sidebar-left {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  gap: 40px;
  align-items: start;
  max-width: var(--shell-max);
  margin: 0 auto;
  padding-left: var(--pad-desktop);
  padding-right: var(--pad-desktop);
}

.zone-sidebar {
  position: sticky;
  top: 88px;
  padding: 18px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.zone-sidebar-title {
  font-size: 15px;
  line-height: 1.5;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.zone-sidebar-toggle {
  display: none;
  width: 100%;
  padding: 10px 12px;
  font-size: 14px;
  line-height: 1.5;
  text-align: left;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 10px;
}

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

.zone-sidebar-link {
  display: block;
  padding: 8px 10px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text);
  border-left: 2px solid transparent;
  border-radius: var(--radius-sm);
}

.zone-sidebar-link:hover {
  background-color: var(--color-bg);
  color: var(--color-secondary);
}

.zone-sidebar-link.is-active {
  background-color: var(--color-bg);
  color: var(--color-primary);
  font-weight: 600;
  border-left-color: var(--color-secondary);
}

.zone-detail {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.zone-detail .zone-figure {
  margin: 0;
}

.zone-detail .zone-figure img {
  aspect-ratio: 21 / 9;
}

.zone-block {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px 24px 20px;
  scroll-margin-top: 96px;
}

.zone-block-head {
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 18px;
}

.zone-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  color: var(--color-secondary);
  margin-bottom: 6px;
}

.zone-name {
  font-size: 22px;
  line-height: 1.4;
  color: var(--color-primary);
}

.zone-summary {
  margin-top: 8px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-muted);
}

.zone-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 28px;
}

.zone-field {
  min-width: 0;
}

.field-label {
  font-size: 15px;
  line-height: 1.5;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.field-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
}

.boundary-block {
  padding-top: 8px;
}

.boundary-grid {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.boundary-col {
  min-width: 0;
  padding: 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
}

.boundary-col-in {
  border-left: 3px solid var(--color-secondary);
}

.boundary-col-out {
  border-left: 3px solid var(--color-danger);
}

.boundary-title {
  font-size: 18px;
  line-height: 1.5;
  color: var(--color-primary);
  margin-bottom: 12px;
}

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

.boundary-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
}

.boundary-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 12px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--color-border-strong);
}

.boundary-col-out .boundary-list li::before {
  background-color: var(--color-danger);
}

.section-links {
  padding-top: 8px;
}

.section-links-list {
  margin-top: 16px;
}

/* --------------------------------------------------------------------------
   pages · 合作流程（journey）
   -------------------------------------------------------------------------- */

.stage-nav {
  padding-top: 24px;
}

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

.stage-nav-item {
  min-width: 0;
}

.stage-nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 15px;
  line-height: 1.5;
  color: var(--color-text);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.stage-nav-link:hover {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
  transform: translateY(-2px);
}

.stage-nav-num {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  color: var(--color-secondary);
}

.stage-nav-name {
  font-weight: 500;
}

.stage-section {
  padding-top: 40px;
}

.stage-block {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 20px;
  scroll-margin-top: 96px;
}

.stage-head {
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 20px;
}

.stage-index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  color: var(--color-secondary);
  margin-bottom: 6px;
}

.stage-title {
  font-size: 22px;
  line-height: 1.4;
  color: var(--color-primary);
}

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

.stage-body {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px 40px;
  align-items: start;
}

.stage-col {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.stage-field {
  min-width: 0;
}

.stage-field-title {
  font-size: 15px;
  line-height: 1.5;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.stage-field p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
}

.stage-field-note {
  padding: 14px 16px;
  background-color: var(--color-bg);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
}

.stage-figure-section {
  padding-top: 8px;
}

.stage-figure {
  margin: 0;
}

.stage-figure img {
  aspect-ratio: 21 / 9;
}

.pitfall-section {
  padding-top: 48px;
}

.pitfall-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 28px;
}

.pitfall-item {
  min-width: 0;
  padding: 16px 18px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.pitfall-term {
  font-size: 15px;
  line-height: 1.6;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.pitfall-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
}

.related-section {
  padding-top: 48px;
  padding-bottom: 8px;
}

.related-section .related-list {
  margin-top: 16px;
}

.related-link {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
}

.related-name {
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-primary);
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   pages · 业务场景（scenarios）
   -------------------------------------------------------------------------- */

.scenario-figure {
  margin: 24px auto 0;
  max-width: var(--shell-wide);
}

.scenario-figure img {
  aspect-ratio: 21 / 9;
}

.scenario-table-section {
  padding-top: 48px;
}

.scenario-table-section h2 {
  font-size: 22px;
  line-height: 1.4;
  color: var(--color-primary);
}

.scenario-table-wrap {
  margin-top: 18px;
  overflow-x: auto;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.scenario-table {
  width: 100%;
  min-width: 720px;
}

.scenario-table th,
.scenario-table td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  font-size: 15px;
  line-height: 1.7;
  border-bottom: 1px solid var(--color-border);
}

.scenario-table thead th {
  background-color: var(--color-bg);
  color: var(--color-primary);
  font-weight: 600;
  font-size: 14px;
  white-space: nowrap;
}

.scenario-table tbody th {
  width: 22%;
  color: var(--color-primary);
  font-weight: 600;
}

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

.scenario-table tbody tr:hover {
  background-color: #FAFBF9;
}

.scenario-guide {
  padding-top: 48px;
}

.scenario-guide h2 {
  font-size: 22px;
  line-height: 1.4;
  color: var(--color-primary);
}

.guide-steps {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 24px;
}

.guide-steps li {
  min-width: 0;
  padding: 18px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.guide-steps h3 {
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.guide-steps p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
}

.guide-link {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 15px;
}

.guide-link a {
  color: var(--color-secondary);
  border-bottom: 1px solid var(--color-border-strong);
}

.scenario-compare {
  padding-top: 48px;
}

.scenario-compare h2 {
  font-size: 22px;
  line-height: 1.4;
  color: var(--color-primary);
}

.compare-toolbar {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px 20px;
}

.compare-count {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-muted);
}

.compare-count span {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--color-primary);
  font-weight: 600;
}

.compare-hint {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-danger);
}

.compare-grid {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.compare-slot {
  min-width: 0;
  padding: 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.compare-slot-title {
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.compare-slot-empty {
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text-muted);
}

.compare-slot.is-filled {
  border-color: var(--color-secondary);
}

.compare-slot dl {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 8px 12px;
  font-size: 14px;
}

.compare-slot dt {
  color: var(--color-text-muted);
  font-weight: 500;
}

.compare-slot dd {
  color: var(--color-text);
  line-height: 1.7;
}

.compare-picker {
  margin-top: 24px;
}

.compare-picker h3 {
  font-size: 18px;
  line-height: 1.5;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.compare-picker-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.compare-add {
  width: 100%;
  padding: 12px 14px;
  font-size: 15px;
  line-height: 1.5;
  text-align: left;
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.compare-add:hover {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
  transform: translateY(-2px);
}

.compare-add.is-selected {
  border-color: var(--color-secondary);
  background-color: #F1F6F4;
  color: var(--color-secondary);
  font-weight: 600;
}

.page-related {
  padding-top: 48px;
  padding-bottom: 8px;
}

.page-related h2 {
  font-size: 22px;
  line-height: 1.4;
  color: var(--color-primary);
}

.page-related .related-list {
  margin-top: 16px;
}

/* --------------------------------------------------------------------------
   pages · 交付标准（standards）
   -------------------------------------------------------------------------- */

.page-standards .page-layout {
  display: block;
}

.page-standards .standards-summary,
.page-standards .standards-scope,
.page-standards .standards-clauses,
.page-standards .standards-acceptance,
.page-standards .standards-links {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding-left: var(--pad-desktop);
  padding-right: var(--pad-desktop);
  min-width: 0;
}

.page-standards .standards-summary {
  padding-top: 40px;
}

.page-standards .standards-summary h2,
.page-standards .standards-scope h2,
.page-standards .standards-clauses h2,
.page-standards .standards-acceptance h2,
.page-standards .standards-links h2 {
  font-size: 22px;
  line-height: 1.4;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.summary-card {
  width: 100%;
  max-width: var(--reading-width);
  padding: 22px 24px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-lg);
}

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

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

.summary-tags li {
  padding: 5px 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-secondary);
  background-color: #F1F6F4;
  border: 1px solid #D6E5E0;
  border-radius: var(--radius-sm);
}

.page-standards .standards-scope {
  padding-top: 48px;
}

.page-standards .standards-scope > p {
  max-width: var(--reading-width);
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
}

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

.scope-item {
  min-width: 0;
  width: 100%;
  padding: 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.scope-item h3 {
  font-size: 18px;
  line-height: 1.5;
  color: var(--color-primary);
  margin-bottom: 10px;
}

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

.page-standards .standards-clauses {
  padding-top: 48px;
}

.page-standards .standards-clauses > p,
.page-standards .standards-acceptance > p,
.page-standards .standards-links > p {
  max-width: var(--reading-width);
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
}

.clause-media {
  margin: 20px 0 0;
  max-width: var(--reading-width);
}

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

.clause-list {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: var(--reading-width);
}

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

.clause-item:first-child {
  border-top: 1px solid var(--color-border);
}

.clause-no {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  color: var(--color-secondary);
  margin-bottom: 6px;
}

.clause-title {
  font-size: 18px;
  line-height: 1.5;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.clause-body {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
}

.page-standards .standards-acceptance {
  padding-top: 48px;
}

.page-standards .standards-acceptance .clause-list {
  margin-top: 20px;
}

.page-standards .standards-links {
  padding-top: 48px;
}

.page-standards .standards-links .entry-list {
  margin-top: 16px;
  max-width: var(--reading-width);
}

.page-standards .section-nav {
  max-width: var(--shell-max);
  margin: 48px auto 0;
  padding: 20px var(--pad-desktop) 0;
  border-top: 1px solid var(--color-border);
}

.page-standards .section-nav-label {
  display: block;
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-muted);
  margin-bottom: 10px;
}

.page-standards .section-nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}

.page-standards .section-nav-list li {
  padding: 0;
  border-bottom: 0;
}

.page-standards .section-nav-list a {
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   pages · 常见问题（faq）
   -------------------------------------------------------------------------- */

.faq-anchor-bar {
  max-width: var(--shell-max);
  margin: 24px auto 0;
  padding: 0 var(--pad-desktop);
}

.faq-anchor-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.faq-anchor {
  display: inline-block;
  padding: 8px 14px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.faq-anchor:hover {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
}

.faq-media {
  margin: 24px auto 0;
  max-width: var(--shell-max);
}

.faq-media img {
  aspect-ratio: 21 / 9;
}

.faq-group {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 48px var(--pad-desktop) 0;
}

.group-head {
  max-width: var(--reading-width);
  margin-bottom: 18px;
}

.group-head h2 {
  font-size: 22px;
  line-height: 1.4;
  color: var(--color-primary);
}

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

.faq-group .faq-item {
  max-width: var(--reading-width);
}

.faq-more {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.7;
}

.faq-fallback {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 48px var(--pad-desktop) 0;
}

.faq-fallback h2 {
  font-size: 22px;
  line-height: 1.4;
  color: var(--color-primary);
}

.faq-fallback > p {
  margin-top: 10px;
  max-width: var(--reading-width);
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
}

.fallback-links {
  margin-top: 16px;
  max-width: var(--reading-width);
}

.page-foot-nav {
  max-width: var(--shell-max);
  margin: 48px auto 0;
  padding: 20px var(--pad-desktop) 0;
  border-top: 1px solid var(--color-border);
}

.page-foot-title {
  font-size: 15px;
  line-height: 1.5;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.page-foot-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}

.page-foot-list li {
  padding: 0;
  border-bottom: 0;
}

/* --------------------------------------------------------------------------
   pages · 合作洽谈（contact）
   -------------------------------------------------------------------------- */

.page-contact .page-hero-inner {
  padding-top: 16px;
}

.page-contact .section-checklist,
.page-contact .section-path,
.page-contact .section-scope,
.page-contact .section-related {
  padding-top: 48px;
}

.checklist {
  margin-top: 20px;
  max-width: var(--reading-width);
  display: flex;
  flex-direction: column;
  gap: 0;
}

.checklist-row {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 8px 24px;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
}

.checklist-row:first-child {
  border-top: 1px solid var(--color-border);
}

.checklist-row dt {
  font-size: 15px;
  line-height: 1.7;
  font-weight: 500;
  color: var(--color-text-muted);
}

.checklist-row dd {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
  min-width: 0;
}

.section-media {
  margin: 20px 0 0;
  max-width: var(--reading-width);
}

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

.path-steps {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.path-step {
  min-width: 0;
  padding: 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-secondary);
  border-radius: var(--radius-md);
}

.path-step-title {
  font-size: 18px;
  line-height: 1.5;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.path-step-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
}

.path-step-output {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--color-border);
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-muted);
}

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

.scope-col {
  min-width: 0;
  padding: 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.scope-col-confirm {
  border-left: 3px solid var(--color-secondary);
}

.scope-col-exclude {
  border-left: 3px solid var(--color-danger);
}

.scope-col-title {
  font-size: 18px;
  line-height: 1.5;
  color: var(--color-primary);
  margin-bottom: 12px;
}

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

.scope-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
}

.scope-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 12px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--color-border-strong);
}

.scope-col-confirm .scope-list li::before {
  background-color: var(--color-secondary);
}

.scope-col-exclude .scope-list li::before {
  background-color: var(--color-danger);
}

.page-contact .section-related .related-list {
  margin-top: 16px;
}

.page-contact .section-nav {
  max-width: var(--shell-max);
  margin: 48px auto 0;
  padding: 20px var(--pad-desktop) 0;
  border-top: 1px solid var(--color-border);
}

.page-contact .section-nav-label {
  display: block;
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-muted);
  margin-bottom: 10px;
}

.page-contact .section-nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}

.page-contact .section-nav-list li {
  padding: 0;
  border-bottom: 0;
}

.page-contact .section-nav-list a {
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-primary);
}

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

.error-main {
  display: flex;
  flex-direction: column;
}

.error-block,
.error-entry-block {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding-left: var(--pad-desktop);
  padding-right: var(--pad-desktop);
  width: 100%;
}

.error-block {
  padding-top: 72px;
  padding-bottom: 40px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-secondary);
  margin-bottom: 10px;
}

.error-block h1 {
  font-size: clamp(26px, 4vw, 36px);
  line-height: 1.35;
  color: var(--color-primary);
}

.error-text {
  margin-top: 14px;
  max-width: var(--reading-width);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
}

.error-home-link {
  display: inline-block;
  margin-top: 22px;
  padding: 11px 24px;
  font-size: 15px;
  line-height: 1.5;
  color: #FFFFFF;
  background-color: var(--color-primary);
  border-radius: var(--radius-md);
}

.error-home-link:hover {
  background-color: var(--color-primary-soft);
  color: #FFFFFF;
}

.error-entry-block {
  padding-bottom: 72px;
}

.error-entry-block h2 {
  font-size: 22px;
  line-height: 1.4;
  color: var(--color-primary);
}

.error-entry-text {
  margin-top: 10px;
  max-width: var(--reading-width);
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-muted);
}

.error-entry-list {
  margin-top: 16px;
  max-width: var(--reading-width);
}

/* --------------------------------------------------------------------------
   responsive · 三档断点：1080px / 820px / 560px
   -------------------------------------------------------------------------- */

@media (max-width: 1080px) {
  :root {
    --pad-desktop: var(--pad-tablet);
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 340px);
    gap: 32px;
  }

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

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

  .layout-shell.sidebar-left {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 28px;
  }

  .section-standards .standards-summary {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
    gap: 28px;
  }
}

@media (max-width: 820px) {
  html {
    scroll-padding-top: 84px;
  }

  /* 移动端导航 ------------------------------------------------------ */

  .header-inner {
    flex-wrap: wrap;
    gap: 12px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    order: 3;
    width: 100%;
    margin-left: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    border-top: 1px solid var(--color-border);
    padding-top: 8px;
    margin-top: 4px;
  }

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

  .nav-list li {
    width: 100%;
  }

  .nav-link {
    display: block;
    width: 100%;
    padding: 12px 4px;
    min-height: 48px;
    border-bottom: 1px solid var(--color-border);
  }

  .nav-link.is-current {
    border-bottom-color: var(--color-border);
    border-left: 3px solid var(--color-primary);
    padding-left: 10px;
  }

  .nav-cta {
    display: block;
    width: 100%;
    margin-top: 10px;
    padding: 13px 18px;
    text-align: center;
    min-height: 48px;
  }

  /* 首屏与多栏模块 -------------------------------------------------- */

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

  .hero-figure {
    order: 2;
  }

  .capability-grid,
  .scenario-columns,
  .contact-steps,
  .path-steps,
  .guide-steps,
  .compare-grid,
  .compare-picker-list,
  .pitfall-list,
  .scope-grid,
  .scope-columns,
  .boundary-grid,
  .zone-fields,
  .stage-body {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .stage-nav-list {
    display: flex;
    overflow-x: auto;
    gap: 10px;
    padding-bottom: 6px;
    -webkit-overflow-scrolling: touch;
  }

  .stage-nav-list li {
    flex: 0 0 auto;
  }

  .stage-nav-link {
    white-space: nowrap;
  }

  /* 服务能力侧栏 ---------------------------------------------------- */

  .layout-shell.sidebar-left {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .zone-sidebar {
    position: static;
    top: auto;
  }

  .zone-sidebar-toggle {
    display: block;
  }

  .zone-sidebar-list {
    display: none;
  }

  .zone-sidebar-list.is-open {
    display: flex;
  }

  .zone-sidebar-link {
    min-height: 44px;
    padding: 11px 10px;
  }

  /* 交付标准摘要 ---------------------------------------------------- */

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

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

  .checklist-row dt {
    color: var(--color-primary);
  }

  /* 表格 ------------------------------------------------------------ */

  .scenario-table-wrap {
    overflow-x: auto;
  }

  .scenario-table {
    min-width: 640px;
  }
}

@media (max-width: 560px) {
  :root {
    --pad-desktop: var(--pad-mobile);
    --pad-tablet: var(--pad-mobile);
  }

  body {
    font-size: 15px;
    line-height: 1.75;
  }

  .header-inner {
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .brand-name {
    font-size: 18px;
  }

  .page-header {
    padding-top: 12px;
  }

  .page-title {
    font-size: clamp(24px, 7vw, 30px);
  }

  .section {
    padding-top: 40px;
  }

  .section-journey,
  .section-standards,
  .section-contact {
    padding-bottom: 40px;
  }

  .hero-inner {
    padding-top: 28px;
    padding-bottom: 28px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .contact-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .contact-actions .btn {
    width: 100%;
  }

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

  .scenario-figure,
  .faq-media,
  .stage-figure {
    margin-top: 20px;
  }

  .zone-block,
  .stage-block,
  .summary-card {
    padding: 18px 16px;
  }

  .zone-name,
  .stage-title,
  .scenario-table-section h2,
  .scenario-guide h2,
  .scenario-compare h2,
  .page-standards .standards-summary h2,
  .page-standards .standards-scope h2,
  .page-standards .standards-clauses h2,
  .page-standards .standards-acceptance h2,
  .page-standards .standards-links h2,
  .faq-group h2,
  .group-head h2,
  .faq-fallback h2,
  .section-title,
  .page-related h2,
  .error-entry-block h2 {
    font-size: 20px;
  }

  .faq-item summary,
  .faq-item .faq-question {
    padding: 13px 40px 13px 14px;
  }

  .faq-answer {
    padding-left: 14px;
    padding-right: 14px;
  }

  .compare-slot dl {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px 0;
  }

  .compare-slot dt {
    margin-top: 8px;
  }

  .compare-add {
    min-height: 48px;
  }

  .anchor-nav .anchor-link,
  .anchor-list a,
  .faq-anchor {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
}

/* --------------------------------------------------------------------------
   motion · 轻量增强（不依赖脚本，不影响初始可见性）
   -------------------------------------------------------------------------- */

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

@media (hover: hover) {
  .capability-card,
  .scenario-col,
  .stage-nav-link,
  .compare-add {
    will-change: transform;
  }
}