/* ==========================================================================
   秋霞网 · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base · 变量与基础
   -------------------------------------------------------------------------- */
:root {
  --c-primary: #1f3a5f;
  --c-accent: #b3542e;
  --c-text: #2b2f36;
  --c-muted: #6b7280;
  --c-line: #e3e6ea;
  --c-block: #f7f8fa;
  --c-zebra: #fbfcfd;
  --c-footer: #16202c;
  --c-footer-text: #c8d0da;
  --c-footer-line: #2a3744;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  --font-head: "Songti SC", "SimSun", "Source Han Serif SC", "Noto Serif CJK SC", Georgia, serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;
  --w-page: 1120px;
  --w-read: 760px;
  --r: 6px;
  --shadow: 0 1px 2px rgba(22, 32, 44, .06), 0 6px 18px rgba(22, 32, 44, .05);
}

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

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

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

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 600;
  color: var(--c-primary);
  line-height: 1.35;
}

p {
  margin: 0;
}

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

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

a:hover,
a:focus-visible {
  color: var(--c-accent);
}

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

figure {
  margin: 0;
}

table {
  border-collapse: collapse;
}

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

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

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

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

.inner-main {
  width: 100%;
  max-width: var(--w-page);
  margin: 0 auto;
  padding: 0 24px 72px;
}

/* 页头 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid var(--c-line);
  backdrop-filter: saturate(140%) blur(6px);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  width: 100%;
  max-width: var(--w-page);
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  transition: height .18s ease;
}

.site-header.is-scrolled .header-inner {
  height: 52px;
}

.brand {
  flex: 0 0 auto;
  font-family: var(--font-head);
  font-size: 21px;
  font-weight: 600;
  color: var(--c-primary);
  letter-spacing: 0;
}

.brand::after {
  content: "";
  display: block;
  width: 26px;
  height: 2px;
  margin-top: 3px;
  background: var(--c-accent);
}

/* 主导航 */
.site-nav {
  flex: 1 1 auto;
  min-width: 0;
}

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

.nav-item {
  position: relative;
}

.nav-item > a {
  display: block;
  padding: 8px 12px;
  font-size: 15px;
  color: var(--c-primary);
  border-radius: var(--r);
  white-space: nowrap;
}

.nav-item > a:hover,
.nav-item > a:focus-visible {
  background: var(--c-block);
  color: var(--c-accent);
}

.nav-item.is-current > a {
  color: var(--c-accent);
  font-weight: 600;
  box-shadow: inset 0 -2px 0 var(--c-accent);
}

/* 导航下拉 */
.nav-item .sub-nav {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 200px;
  padding: 8px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r);
  box-shadow: var(--shadow);
  display: none;
}

.nav-item.is-open > .sub-nav,
.nav-item:hover > .sub-nav,
.nav-item:focus-within > .sub-nav {
  display: block;
}

.sub-nav a {
  display: block;
  padding: 7px 10px;
  font-size: 14px;
  border-radius: var(--r);
}

.sub-nav a:hover {
  background: var(--c-block);
}

.header-cta {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 18px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: var(--c-accent);
  border-radius: var(--r);
}

.header-cta:hover,
.header-cta:focus-visible {
  color: #fff;
  background: #9a4525;
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  border: 1px solid var(--c-line);
  border-radius: var(--r);
}

.nav-toggle-bar {
  display: block;
  height: 2px;
  background: var(--c-primary);
  transition: transform .18s ease, opacity .18s ease;
}

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

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

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

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 22px 0 6px;
  font-size: 13px;
  color: var(--c-muted);
}

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

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

.breadcrumb-sep {
  color: #b6bcc4;
}

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

/* 页面标题区 */
.page-header {
  padding: 10px 0 26px;
  border-bottom: 1px solid var(--c-line);
}

.page-title {
  font-size: 34px;
  line-height: 1.3;
}

.page-description {
  max-width: var(--w-read);
  margin-top: 14px;
  font-size: 16px;
  color: #4b5563;
}

.page-description a {
  color: var(--c-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 页内锚点导航 */
.anchor-nav,
.page-anchors {
  margin-top: 20px;
}

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

.anchor-list a,
.page-anchor-list a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 14px;
  font-size: 14px;
  color: var(--c-primary);
  background: var(--c-block);
  border: 1px solid var(--c-line);
  border-radius: 999px;
}

.anchor-list a:hover,
.page-anchor-list a:hover {
  color: var(--c-accent);
  border-color: #d9c3b6;
}

/* 页脚 */
.site-footer {
  flex: 0 0 auto;
  background: var(--c-footer);
  color: var(--c-footer-text);
}

.footer-inner {
  width: 100%;
  max-width: var(--w-page);
  margin: 0 auto;
  padding: 48px 24px 28px;
}

.footer-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--c-footer-line);
}

.footer-logo {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 600;
  color: #fff;
}

.footer-slogan {
  max-width: 460px;
  margin-top: 10px;
  font-size: 14px;
  color: var(--c-footer-text);
}

.footer-cta {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 20px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: var(--c-accent);
  border-radius: var(--r);
}

.footer-cta:hover,
.footer-cta:focus-visible {
  color: #fff;
  background: #9a4525;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
  padding: 30px 0;
}

.footer-col-title {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 12px;
}

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

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

.footer-col a:hover,
.footer-col a:focus-visible {
  color: #fff;
}

.footer-bottom {
  padding-top: 22px;
  border-top: 1px solid var(--c-footer-line);
}

.footer-note {
  font-size: 13px;
  line-height: 1.7;
  color: #9aa6b3;
}

.footer-copy {
  margin-top: 10px;
  font-size: 13px;
  color: #7d8895;
}

.back-to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 50;
  width: 46px;
  height: 46px;
  font-size: 13px;
  color: var(--c-primary);
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: 50%;
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transition: opacity .2s ease, visibility .2s ease;
}

.back-to-top::before {
  content: "↑";
  font-size: 17px;
  line-height: 1;
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  color: var(--c-accent);
  border-color: #d9c3b6;
}

/* --------------------------------------------------------------------------
   components · 通用组件
   -------------------------------------------------------------------------- */
.section {
  padding: 46px 0;
  border-bottom: 1px solid var(--c-line);
}

.section:last-of-type {
  border-bottom: 0;
}

.section-head {
  max-width: var(--w-read);
  margin-bottom: 26px;
}

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

.section-head p,
.section-desc,
.section-lead,
.section-intro {
  margin-top: 10px;
  font-size: 15px;
  color: #4b5563;
}

.section-desc a,
.section-lead a,
.section-intro a {
  color: var(--c-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.section-foot {
  margin-top: 24px;
}

.link-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 34px;
  font-size: 14px;
  font-weight: 600;
  color: var(--c-accent);
}

.link-more::after {
  content: "→";
}

.link-more:hover {
  color: #8d4020;
}

.conclusion,
.section-conclusion {
  margin-top: 22px;
  padding-left: 14px;
  border-left: 3px solid var(--c-accent);
  font-size: 15px;
  color: #3c434c;
}

.section-conclusion a {
  color: var(--c-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 图片容器 */
.hero-media,
.content-media,
.section-media,
.scene-media,
.section-figure,
.article-media,
.about-figure {
  overflow: hidden;
  background: var(--c-block);
  border: 1px solid var(--c-line);
  border-radius: var(--r);
}

.hero-media img,
.content-media img,
.section-media img,
.scene-media img,
.section-figure img,
.article-media img,
.about-figure img {
  display: block;
  width: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 10;
}

.hero-media figcaption,
.content-media figcaption,
.section-media figcaption,
.scene-media figcaption,
.section-figure figcaption,
.article-media figcaption,
.about-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--c-muted);
  border-top: 1px solid var(--c-line);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--r);
  border: 1px solid transparent;
}

.btn-primary {
  color: #fff;
  background: var(--c-accent);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  color: #fff;
  background: #9a4525;
}

.btn-ghost {
  color: var(--c-primary);
  background: #fff;
  border-color: #c9d2dc;
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  color: var(--c-accent);
  border-color: var(--c-accent);
}

/* 表格 */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--c-line);
  border-radius: var(--r);
}

.data-table {
  width: 100%;
  min-width: 560px;
  font-size: 14px;
  line-height: 1.6;
}

.data-table caption,
.table-caption {
  padding: 12px 16px;
  text-align: left;
  font-size: 13px;
  color: var(--c-muted);
  caption-side: top;
}

.data-table th,
.data-table td {
  padding: 12px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--c-line);
}

.data-table thead th {
  font-weight: 600;
  color: var(--c-primary);
  background: var(--c-block);
  white-space: nowrap;
}

.data-table tbody tr:nth-child(even) {
  background: var(--c-zebra);
}

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

.data-table tbody th {
  font-weight: 600;
  color: var(--c-primary);
  white-space: nowrap;
}

/* 编号清单 */
.numbered-list,
.prepare-list,
.boundary-list,
.prep-checklist,
.misread-list,
.step-list,
.path-steps {
  counter-reset: num;
  display: grid;
  gap: 14px;
}

.numbered-item,
.prepare-item,
.boundary-list > li,
.prep-item,
.misread-item,
.step-item,
.path-step {
  position: relative;
  padding: 16px 18px 16px 56px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-primary);
  border-radius: var(--r);
}

.numbered-item::before,
.prepare-item::before,
.boundary-list > li::before,
.misread-item::before,
.step-item::before {
  counter-increment: num;
  content: counter(num, decimal-leading-zero);
  position: absolute;
  left: 18px;
  top: 17px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--c-accent);
}

.numbered-title,
.prepare-item h3,
.boundary-title,
.misread-name,
.step-title {
  font-size: 17px;
}

.numbered-desc,
.numbered-text,
.prepare-item p,
.misread-fix,
.step-item p {
  margin-top: 8px;
  font-size: 15px;
  color: #4b5563;
}

/* 常见问题 */
.faq-list {
  display: grid;
  gap: 10px;
}

.faq-item {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r);
}

.faq-item summary,
.faq-question {
  position: relative;
  display: block;
  padding: 15px 46px 15px 18px;
  font-size: 16px;
  font-weight: 600;
  color: var(--c-primary);
  cursor: pointer;
  list-style: none;
}

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

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

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

.faq-item p,
.faq-answer p {
  padding: 0 18px 16px;
  font-size: 15px;
  color: #4b5563;
}

.faq-answer {
  border-top: 1px solid var(--c-line);
  padding-top: 12px;
}

/* 简单列表 */
.plain-list,
.scope-list,
.compare-list,
.scene-points,
.stage-list,
.related-list,
.related-links,
.more-list {
  display: grid;
  gap: 8px;
}

.plain-list li,
.scope-list li,
.compare-list li,
.scene-points li,
.stage-list li {
  position: relative;
  padding-left: 16px;
  font-size: 15px;
  color: #4b5563;
}

.plain-list li::before,
.scope-list li::before,
.compare-list li::before,
.scene-points li::before,
.stage-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  background: var(--c-accent);
  border-radius: 50%;
}

/* 入场增强（不依赖 JS 也能看到内容） */
.reveal {
  opacity: 1;
}

@media (prefers-reduced-motion: no-preference) {
  .reveal {
    animation: reveal-up .5s ease both;
  }

  @keyframes reveal-up {
    from {
      opacity: .001;
      transform: translateY(10px);
    }
    to {
      opacity: 1;
      transform: none;
    }
  }
}

/* --------------------------------------------------------------------------
   pages · 首页
   -------------------------------------------------------------------------- */
.home-main {
  width: 100%;
  max-width: var(--w-page);
  margin: 0 auto;
  padding: 0 24px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 460px);
  gap: 40px;
  align-items: start;
  padding: 52px 0 46px;
  border-bottom: 1px solid var(--c-line);
}

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

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-accent);
}

.hero-title {
  margin-top: 12px;
  font-size: 38px;
  line-height: 1.28;
}

.hero-lead {
  max-width: 560px;
  margin-top: 16px;
  font-size: 16px;
  color: #4b5563;
}

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

.hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin: 30px 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--c-line);
}

.hero-fact dt {
  font-size: 13px;
  color: var(--c-muted);
}

.hero-fact dd {
  margin: 6px 0 0;
  font-size: 15px;
  color: var(--c-text);
}

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

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

.content-media-primary {
  grid-column: 2;
  min-width: 0;
}

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

/* 首页业务分栏 */
.business-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.business-col {
  min-width: 0;
  padding: 22px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-top: 3px solid var(--c-primary);
  border-radius: var(--r);
}

.business-col h3 {
  font-size: 18px;
}

.business-col p {
  margin-top: 10px;
  font-size: 15px;
  color: #4b5563;
}

.business-col .plain-list {
  margin-top: 14px;
}

.business-col .link-more {
  margin-top: 16px;
}

/* 首页场景索引 */
.scenario-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--c-line);
}

.scenario-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
  gap: 24px;
  align-items: start;
  padding: 20px 4px;
  border-bottom: 1px solid var(--c-line);
}

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

.scenario-main h3 {
  font-size: 18px;
}

.scenario-main p {
  margin-top: 8px;
  font-size: 15px;
  color: #4b5563;
}

.scenario-combo {
  font-size: 14px;
  color: var(--c-primary);
  background: var(--c-block);
  border-left: 3px solid var(--c-accent);
  border-radius: 0 var(--r) var(--r) 0;
  padding: 12px 14px;
}

/* 首页交付阶段条 */
.stage-bar {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-top: 2px solid var(--c-primary);
}

.stage-item {
  position: relative;
  min-width: 0;
  padding: 22px 20px 22px 0;
}

.stage-item + .stage-item {
  padding-left: 22px;
  border-left: 1px solid var(--c-line);
}

.stage-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-accent);
}

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

.stage-item p {
  margin-top: 8px;
  font-size: 14px;
  color: #4b5563;
}

/* 首页包含与不包含对照 */
.scope-compare {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.scope-col {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--c-line);
  border-radius: var(--r);
}

.scope-in {
  background: #fff;
  border-top: 3px solid var(--c-primary);
}

.scope-out {
  background: var(--c-block);
  border-top: 3px solid #b6bcc4;
}

.scope-col h3 {
  font-size: 17px;
}

.scope-col .scope-list {
  margin-top: 14px;
}

.scope-out .scope-list li::before {
  background: #98a1ac;
}

/* 首页洞察摘要 */
.insight-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 26px;
}

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

.insight-item h3 {
  font-size: 17px;
}

.insight-item p {
  margin-top: 8px;
  font-size: 15px;
  color: #4b5563;
}

/* 首页准备清单 */
.prepare-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.prepare-list .prepare-item:last-child:nth-child(odd) {
  grid-column: 1 / -1;
}

/* --------------------------------------------------------------------------
   pages · 内页通用
   -------------------------------------------------------------------------- */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 260px);
  gap: 40px;
  align-items: start;
  padding-top: 26px;
}

.sidebar-left .page-layout,
.page-layout.sidebar-left {
  grid-template-columns: minmax(0, 260px) minmax(0, 1fr);
}

.page-aside {
  position: sticky;
  top: 84px;
  min-width: 0;
  padding: 20px;
  background: var(--c-block);
  border: 1px solid var(--c-line);
  border-radius: var(--r);
}

.aside-title {
  font-size: 16px;
}

.aside-list {
  display: grid;
  gap: 6px;
  margin-top: 14px;
}

.aside-list a {
  display: block;
  padding: 8px 10px;
  font-size: 14px;
  color: var(--c-primary);
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r);
}

.aside-list a:hover {
  color: var(--c-accent);
  border-color: #d9c3b6;
}

.aside-note {
  margin-top: 14px;
  font-size: 13px;
  color: var(--c-muted);
}

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

/* 业务页服务事项 */
.service-items {
  padding-top: 34px;
}

.service-item {
  min-width: 0;
  padding: 22px;
  margin-top: 18px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-primary);
  border-radius: var(--r);
}

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

.service-fields {
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr);
  gap: 10px 20px;
  margin: 16px 0 0;
}

.service-fields dt {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-muted);
}

.service-fields dd {
  margin: 0;
  font-size: 15px;
  color: var(--c-text);
}

.section-media {
  margin-top: 24px;
}

/* 包含与不包含对照 */
.compare-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.compare-col {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--c-line);
  border-radius: var(--r);
}

.compare-col-include {
  background: #fff;
  border-top: 3px solid var(--c-primary);
}

.compare-col-exclude {
  background: var(--c-block);
  border-top: 3px solid #b6bcc4;
}

.compare-title {
  font-size: 17px;
}

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

.compare-col-exclude .compare-list li::before {
  background: #98a1ac;
}

/* 场景页 */
.section-overview {
  padding-top: 34px;
}

.scene-list {
  display: grid;
  gap: 12px;
}

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

.scene-link {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr) minmax(0, 260px);
  grid-template-areas:
    "index name combo"
    "index need combo";
  gap: 6px 20px;
  align-items: start;
  padding: 18px 20px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r);
}

.scene-link:hover {
  border-color: #c9d2dc;
}

.scene-index {
  grid-area: index;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--c-accent);
}

.scene-name {
  grid-area: name;
  font-size: 18px;
}

.scene-need {
  grid-area: need;
  font-size: 15px;
  color: #4b5563;
}

.scene-combo {
  grid-area: combo;
  padding: 12px 14px;
  font-size: 14px;
  color: var(--c-primary);
  background: var(--c-block);
  border-left: 3px solid var(--c-accent);
  border-radius: 0 var(--r) var(--r) 0;
}

.scene-block {
  min-width: 0;
  padding: 26px 0;
  border-bottom: 1px solid var(--c-line);
}

.scene-block:last-of-type {
  border-bottom: 0;
}

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

.scene-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 26px;
}

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

.scene-col-title {
  font-size: 17px;
}

.scene-points {
  margin-top: 14px;
}

.scene-combo-name {
  margin-top: 12px;
  font-size: 15px;
  font-weight: 600;
  color: var(--c-accent);
}

.scene-col-combo > p {
  margin-top: 10px;
  font-size: 15px;
  color: #4b5563;
}

.scene-note {
  padding-left: 12px;
  border-left: 2px solid var(--c-line);
  font-size: 14px;
  color: var(--c-muted);
}

/* 交付页 */
.layout-shell {
  display: block;
  padding-top: 26px;
}

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

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

.stage-bar-item {
  position: relative;
  min-width: 0;
  padding: 22px 20px 22px 0;
}

.stage-bar-item + .stage-bar-item {
  padding-left: 22px;
  border-left: 1px solid var(--c-line);
}

.stage-name {
  margin-top: 8px;
  font-size: 17px;
}

.stage-brief {
  margin-top: 8px;
  font-size: 14px;
  color: #4b5563;
}

.stage-block {
  min-width: 0;
  padding: 24px 0;
  border-bottom: 1px solid var(--c-line);
}

.stage-block:last-of-type {
  border-bottom: 0;
}

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

.stage-block-title .stage-index {
  display: inline-block;
  margin-right: 10px;
}

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

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

.stage-col-title {
  font-size: 15px;
  color: var(--c-muted);
  font-family: var(--font-body);
  font-weight: 600;
}

.stage-col .stage-list {
  margin-top: 12px;
}

/* 交付页相关链接 */
.related-list {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.related-item a {
  display: flex;
  align-items: center;
  min-height: 52px;
  padding: 12px 16px;
  font-size: 15px;
  font-weight: 600;
  background: var(--c-block);
  border: 1px solid var(--c-line);
  border-radius: var(--r);
}

.related-item a:hover {
  color: var(--c-accent);
  border-color: #d9c3b6;
}

/* 洞察页 */
.insight-catalog {
  padding: 34px 0 46px;
  border-bottom: 1px solid var(--c-line);
}

.topic-filter {
  margin: 22px 0 20px;
}

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

.topic-item a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 14px;
  font-size: 14px;
  color: var(--c-primary);
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: 999px;
}

.topic-item.is-active a {
  color: #fff;
  background: var(--c-primary);
  border-color: var(--c-primary);
}

.insight-list {
  gap: 0;
  border-top: 1px solid var(--c-line);
}

.insight-entry {
  min-width: 0;
  border-bottom: 1px solid var(--c-line);
}

.insight-link {
  display: block;
  padding: 18px 4px;
}

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

.insight-topic {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-accent);
}

.insight-summary {
  margin-top: 8px;
  max-width: var(--w-read);
  font-size: 15px;
  color: #4b5563;
}

.insight-article {
  padding: 46px 0;
  border-bottom: 1px solid var(--c-line);
}

.article-header {
  max-width: var(--w-read);
}

.article-topic {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-accent);
}

.article-title {
  margin-top: 10px;
  font-size: 26px;
}

.article-media {
  max-width: var(--w-read);
  margin-top: 22px;
}

.article-body {
  max-width: var(--w-read);
  margin-top: 26px;
}

.article-part + .article-part {
  margin-top: 26px;
  padding-top: 26px;
  border-top: 1px solid var(--c-line);
}

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

.article-part p {
  margin-top: 12px;
  font-size: 16px;
  color: #3c434c;
}

.part-conclusion {
  padding-left: 14px;
  border-left: 3px solid var(--c-accent);
  font-size: 15px;
  color: #3c434c;
}

.insight-misread,
.insight-more {
  padding: 46px 0;
  border-bottom: 1px solid var(--c-line);
}

.insight-more {
  border-bottom: 0;
}

.more-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 30px;
}

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

.more-title {
  font-size: 17px;
}

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

.more-list a {
  display: block;
  padding: 10px 0;
  font-size: 15px;
  border-bottom: 1px solid var(--c-line);
}

.more-list a:hover {
  color: var(--c-accent);
}

/* 关于页 */
.about-positioning,
.about-boundary,
.about-checklist,
.about-path,
.about-related {
  padding: 46px 0;
  border-bottom: 1px solid var(--c-line);
}

.about-related {
  border-bottom: 0;
}

.about-positioning-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 30px;
}

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

.subsection-title {
  font-size: 18px;
}

.positioning-col p {
  margin-top: 12px;
  font-size: 15px;
  color: #4b5563;
}

.about-figure {
  margin-top: 18px;
}

.boundary-list > li {
  border-left-color: #b6bcc4;
}

.boundary-list > li::before {
  color: var(--c-muted);
}

.prep-checklist {
  gap: 12px;
}

.prep-item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 16px;
  padding: 16px 18px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r);
}

.prep-index {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--c-accent);
}

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

.prep-title {
  font-size: 17px;
}

.prep-body p {
  margin-top: 8px;
  font-size: 15px;
  color: #4b5563;
}

.conclusion-note {
  margin-top: 22px;
  padding-left: 14px;
  border-left: 3px solid var(--c-accent);
  font-size: 15px;
  color: #3c434c;
}

.path-steps {
  gap: 12px;
}

.path-step {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 16px;
  padding: 16px 18px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r);
}

.path-step::before,
.prep-item::before {
  content: none;
}

.path-step .step-index {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--c-accent);
}

.path-step p {
  grid-column: 2;
  margin-top: 8px;
  font-size: 15px;
  color: #4b5563;
}

.path-step p a {
  color: var(--c-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.about-path .subsection-title {
  margin-top: 34px;
}

.about-related .related-links {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.related-links a {
  display: flex;
  align-items: center;
  min-height: 50px;
  padding: 12px 16px;
  font-size: 15px;
  font-weight: 600;
  background: var(--c-block);
  border: 1px solid var(--c-line);
  border-radius: var(--r);
}

.related-links a:hover {
  color: var(--c-accent);
  border-color: #d9c3b6;
}

/* 404 */
.error-main {
  display: flex;
  align-items: center;
}

.error-inner {
  width: 100%;
  max-width: var(--w-page);
  margin: 0 auto;
  padding: 72px 24px;
}

.error-inner h1 {
  font-size: 32px;
}

.error-text {
  max-width: var(--w-read);
  margin-top: 14px;
  font-size: 16px;
  color: #4b5563;
}

.error-links {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
}

.error-links a {
  display: flex;
  align-items: center;
  min-height: 50px;
  padding: 12px 16px;
  font-size: 15px;
  font-weight: 600;
  background: var(--c-block);
  border: 1px solid var(--c-line);
  border-radius: var(--r);
}

.error-links a:hover {
  color: var(--c-accent);
  border-color: #d9c3b6;
}

/* --------------------------------------------------------------------------
   responsive · 断点
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .page-title {
    font-size: 30px;
  }

  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding-top: 40px;
  }

  .content-media-primary {
    grid-column: auto;
  }

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

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

  .stage-item:nth-child(odd),
  .stage-bar-item:nth-child(odd) {
    padding-left: 0;
    border-left: 0;
  }

  .stage-item:nth-child(n + 3),
  .stage-bar-item:nth-child(n + 3) {
    border-top: 1px solid var(--c-line);
  }

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

  .stage-col:last-child {
    grid-column: 1 / -1;
  }

  .page-layout,
  .sidebar-left .page-layout,
  .page-layout.sidebar-left {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
  }

  .page-aside {
    position: static;
  }

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

  .scene-link {
    grid-template-columns: 48px minmax(0, 1fr);
    grid-template-areas:
      "index name"
      "index need"
      "combo combo";
  }

  .scene-combo {
    margin-top: 8px;
  }

  .related-list,
  .about-related .related-links,
  .error-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  body {
    font-size: 16px;
  }

  .header-inner {
    height: 58px;
    gap: 14px;
    padding: 0 16px;
  }

  .site-header.is-scrolled .header-inner {
    height: 54px;
  }

  .brand {
    font-size: 19px;
  }

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

  .site-nav {
    order: 3;
    flex: 0 0 100%;
    min-width: 0;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 8px 0 14px;
    border-top: 1px solid var(--c-line);
  }

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

  .nav-item > a {
    padding: 12px 6px;
    font-size: 16px;
  }

  .nav-item .sub-nav {
    position: static;
    display: block;
    min-width: 0;
    padding: 0 0 6px 12px;
    border: 0;
    box-shadow: none;
  }

  .sub-nav a {
    padding: 10px 6px;
    font-size: 15px;
  }

  .header-cta {
    min-height: 38px;
    padding: 0 14px;
    font-size: 13px;
  }

  .inner-main,
  .home-main,
  .error-inner,
  .footer-inner {
    padding-left: 16px;
    padding-right: 16px;
  }

  .breadcrumb {
    padding-top: 16px;
  }

  .page-header {
    padding-bottom: 20px;
  }

  .page-title {
    font-size: 26px;
  }

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

  .article-title {
    font-size: 22px;
  }

  .hero-title {
    font-size: 27px;
  }

  .hero {
    padding-top: 30px;
    padding-bottom: 34px;
  }

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

  .section {
    padding: 34px 0;
  }

  .business-columns,
  .scope-compare,
  .compare-grid,
  .insight-columns,
  .prepare-list,
  .scene-columns,
  .stage-columns,
  .more-grid,
  .about-positioning-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .prepare-list .prepare-item:last-child:nth-child(odd),
  .stage-col:last-child {
    grid-column: auto;
  }

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

  .stage-item,
  .stage-item + .stage-item,
  .stage-bar-item,
  .stage-bar-item + .stage-bar-item {
    padding: 18px 0;
    border-left: 0;
    border-top: 1px solid var(--c-line);
  }

  .stage-item:first-child,
  .stage-bar-item:first-child {
    border-top: 0;
  }

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

  .scene-link {
    grid-template-columns: 40px minmax(0, 1fr);
    padding: 16px;
  }

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

  .service-fields dt {
    margin-top: 8px;
  }

  .service-fields dd {
    padding-bottom: 6px;
    border-bottom: 1px solid var(--c-line);
  }

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

  .anchor-list,
  .page-anchor-list,
  .topic-list {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 6px;
    -webkit-overflow-scrolling: touch;
  }

  .anchor-list li,
  .page-anchor-list li,
  .topic-item {
    flex: 0 0 auto;
  }

  .numbered-item,
  .prepare-item,
  .boundary-list > li,
  .misread-item,
  .step-item {
    padding: 14px 16px 14px 48px;
  }

  .prep-item,
  .path-step {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 12px;
    padding: 14px 16px;
  }

  .footer-top {
    flex-direction: column;
    gap: 20px;
  }

  .footer-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

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

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