/* ==========================================================================
   禁漫天堂 · 全站样式表
   结构：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. base — 变量、重置、排版基线
   -------------------------------------------------------------------------- */
:root {
  --ink: #1c1c1c;
  --ink-soft: #4a4a4a;
  --ink-mute: #6b6b6b;
  --navy: #16283f;
  --navy-soft: #24405f;
  --amber: #b45309;
  --amber-soft: #fdf1e0;
  --teal: #2f6f6b;
  --teal-soft: #e6f1f0;
  --paper: #fbfaf7;
  --paper-alt: #f3f0ea;
  --line: #d9d5cd;
  --line-strong: #c2bcb0;
  --white: #ffffff;
  --radius: 6px;
  --radius-sm: 4px;
  --shell: 1120px;
  --gutter: 28px;
  --mono: "SFMono-Regular", "JetBrains Mono", Consolas, "Liberation Mono", Menlo, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC",
    Arial, sans-serif;
}

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

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

body {
  margin: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--navy);
  font-weight: 700;
  line-height: 1.35;
}

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(--navy-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

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

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

strong {
  color: var(--navy);
}

/* --------------------------------------------------------------------------
   2. layout — 全站骨架：页头、导航、主容器、内页外壳、页脚
   -------------------------------------------------------------------------- */

/* 2.1 页头与主导航（全站统一） */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--navy);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 14px var(--gutter);
}

.brand-logo {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  color: var(--white);
  text-decoration: none;
}

.brand-logo:hover {
  color: var(--white);
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: normal;
}

.brand-tagline {
  color: #b9c6d6;
  font-size: 12.5px;
  line-height: 1.4;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 46px;
  height: 46px;
  padding: 0 11px;
  background-color: transparent;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  height: 2px;
  background-color: var(--white);
  border-radius: 2px;
}

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

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

.nav-item {
  display: block;
}

.nav-link {
  display: block;
  padding: 9px 12px;
  color: #dce4ee;
  font-size: 15.5px;
  text-decoration: none;
  border-radius: var(--radius-sm);
  border-bottom: 2px solid transparent;
}

.nav-link:hover {
  color: var(--white);
  background-color: rgba(255, 255, 255, 0.08);
}

.nav-link.is-current {
  color: var(--white);
  font-weight: 700;
  border-bottom-color: #f0b25c;
}

/* 2.2 主内容容器 */
.site-main {
  display: block;
  width: 100%;
}

.home-main {
  overflow: visible;
}

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

/* 2.3 内页统一外壳：面包屑 + 页标题区 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 22px 0 0;
  color: var(--ink-mute);
  font-size: 14.5px;
}

.breadcrumb a {
  color: var(--navy-soft);
  text-decoration: underline;
}

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

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

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

.page-header {
  padding: 18px 0 34px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 40px;
}

.page-title {
  font-size: 34px;
  font-weight: 700;
  color: var(--navy);
}

.page-description {
  max-width: 820px;
  margin-top: 14px;
  color: var(--ink-soft);
  font-size: 17px;
}

.page-lede {
  max-width: 820px;
  margin-top: 12px;
  color: var(--ink-soft);
  font-size: 16px;
}

/* 2.4 页脚（全站统一） */
.site-footer {
  background-color: var(--navy);
  color: #c8d3e0;
  font-size: 15px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 34px;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 46px var(--gutter) 30px;
}

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

.footer-brand-name {
  color: var(--white);
  font-size: 19px;
  font-weight: 700;
}

.footer-brand-desc {
  margin-top: 10px;
  color: #a9b8c9;
  line-height: 1.7;
}

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

.footer-group-title {
  color: var(--white);
  font-size: 15.5px;
  font-weight: 700;
  letter-spacing: normal;
}

.footer-list {
  margin-top: 12px;
}

.footer-item + .footer-item {
  margin-top: 8px;
}

.footer-link {
  color: #c8d3e0;
  text-decoration: underline;
}

.footer-link:hover {
  color: #f0b25c;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 18px var(--gutter) 26px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  color: #93a4b8;
  font-size: 13.5px;
}

/* 2.5 通用 section 骨架 */
.section {
  padding: 56px 0;
  border-bottom: 1px solid var(--line);
}

.section:last-child {
  border-bottom: none;
}

.section-inner {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section-head {
  max-width: 860px;
  margin-bottom: 30px;
}

.section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--navy);
}

.section-intro,
.section-desc,
.section-lead {
  margin-top: 12px;
  color: var(--ink-soft);
}

.section-lead {
  max-width: 860px;
}

.section-footnote {
  margin-top: 26px;
  color: var(--ink-mute);
  font-size: 15px;
}

.text-link {
  color: var(--navy-soft);
  font-weight: 600;
  text-decoration: underline;
}

.text-link:hover {
  color: var(--amber);
}

.subsection-title {
  margin-top: 34px;
  font-size: 19px;
}

/* 2.6 通用图片容器 */
.media-figure,
.hero-media,
.prepare-media,
.section-figure,
.stage-figure,
.faq-figure {
  overflow: hidden;
  background-color: var(--paper-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.media-figure img,
.hero-media img,
.prepare-media img,
.section-figure img,
.stage-figure img,
.faq-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-caption,
.hero-caption,
.figure-caption,
.faq-figure-caption,
.stage-figure figcaption {
  padding: 10px 14px;
  color: var(--ink-mute);
  font-size: 13.5px;
  line-height: 1.6;
  border-top: 1px solid var(--line);
}

/* --------------------------------------------------------------------------
   3. components — 按钮、卡片、列表、折叠、索引等复用组件
   -------------------------------------------------------------------------- */

/* 3.1 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 11px 22px;
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius);
  border: 2px solid transparent;
  transition: background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}

.btn-primary {
  background-color: var(--amber);
  color: var(--white);
  border-color: var(--amber);
}

.btn-primary:hover {
  background-color: #8f4108;
  border-color: #8f4108;
  color: var(--white);
}

.btn-secondary {
  background-color: transparent;
  color: var(--navy);
  border-color: var(--navy);
}

.btn-secondary:hover {
  background-color: var(--navy);
  color: var(--white);
}

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

.btn-outline:hover {
  background-color: var(--navy);
  color: var(--white);
}

/* 3.2 折叠问答条目 */
.faq-item {
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.faq-item + .faq-item {
  margin-top: 12px;
}

.faq-question {
  position: relative;
  padding: 16px 46px 16px 18px;
  color: var(--navy);
  font-size: 17px;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 18px;
  transform: translateY(-50%);
  color: var(--amber);
  font-family: var(--mono);
  font-size: 20px;
  line-height: 1;
}

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

.faq-question:hover {
  color: var(--amber);
}

.faq-answer {
  padding: 0 18px 18px;
  border-top: 1px solid var(--line);
}

.faq-answer p {
  margin-top: 12px;
  color: var(--ink-soft);
}

/* 3.3 编号与阶段标识 */
.direction-index,
.stage-number,
.stage-index,
.error-code {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

/* --------------------------------------------------------------------------
   4. pages
   -------------------------------------------------------------------------- */

/* 4.1 首页 */
.top-fact-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background-color: var(--amber-soft);
  border-bottom: 1px solid #e8d4b4;
}

.top-fact-text {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 10px var(--gutter) 0;
  color: #6d3f08;
  font-size: 14.5px;
}

.top-fact-link {
  display: block;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter) 10px;
  color: #6d3f08;
  font-size: 14.5px;
  font-weight: 700;
}

.top-fact-link:hover {
  color: var(--amber);
}

/* 首屏 */
.hero-section {
  background-color: var(--white);
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  gap: 44px;
  align-items: start;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 54px var(--gutter) 56px;
}

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

.hero-eyebrow {
  display: inline-block;
  padding: 4px 10px;
  background-color: var(--teal-soft);
  color: var(--teal);
  font-size: 13.5px;
  font-weight: 700;
  border-radius: var(--radius-sm);
}

.hero-title {
  margin-top: 16px;
  font-size: 34px;
  font-weight: 700;
  color: var(--navy);
}

.hero-summary {
  margin-top: 16px;
  max-width: 620px;
  color: var(--ink-soft);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 32px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

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

.hero-fact-term {
  color: var(--navy);
  font-size: 15px;
  font-weight: 700;
}

.hero-fact-desc {
  margin-top: 6px;
  color: var(--ink-mute);
  font-size: 14.5px;
  line-height: 1.65;
}

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

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

/* 服务方向总览 */
.direction-list {
  border-top: 1px solid var(--line);
}

.direction-item {
  display: grid;
  grid-template-columns: 60px minmax(0, 1fr);
  gap: 20px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.direction-index {
  color: var(--amber);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.5;
}

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

.direction-name {
  font-size: 19px;
  font-weight: 700;
}

.direction-scene {
  margin-top: 8px;
  color: var(--ink-soft);
}

.direction-meta {
  margin-top: 6px;
  color: var(--ink-mute);
  font-size: 14.5px;
}

.direction-link {
  display: inline-block;
  margin-top: 10px;
  color: var(--navy-soft);
  font-weight: 600;
  text-decoration: underline;
}

.direction-link:hover {
  color: var(--amber);
}

/* 阶段条带 */
.stage-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.stage-card {
  min-width: 0;
  padding: 20px 18px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--teal);
  border-radius: var(--radius);
}

.stage-card .stage-number {
  display: block;
  color: var(--teal);
  font-size: 14px;
  font-weight: 700;
}

.stage-card .stage-name {
  margin-top: 8px;
  font-size: 18px;
  font-weight: 700;
}

.stage-card .stage-goal {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 15.5px;
}

.stage-card .stage-output {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--line-strong);
  color: var(--ink-mute);
  font-size: 14px;
}

.stage-media-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  margin-top: 28px;
}

.stage-media-row .media-figure img {
  aspect-ratio: 16 / 9;
}

/* 交付边界摘要 */
.boundary-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.boundary-col {
  min-width: 0;
  padding: 22px 20px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.boundary-col-include {
  border-top: 3px solid var(--teal);
}

.boundary-col-exclude {
  border-top: 3px solid var(--amber);
}

.boundary-heading {
  font-size: 18px;
  font-weight: 700;
}

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

.boundary-item {
  position: relative;
  padding-left: 20px;
  color: var(--ink-soft);
  font-size: 15.5px;
}

.boundary-item + .boundary-item {
  margin-top: 10px;
}

.boundary-item::before {
  content: "";
  position: absolute;
  top: 11px;
  left: 2px;
  width: 8px;
  height: 8px;
  background-color: var(--line-strong);
  border-radius: 2px;
}

.boundary-col-include .boundary-item::before {
  background-color: var(--teal);
}

.boundary-col-exclude .boundary-item::before {
  background-color: var(--amber);
}

/* 常见问题速览 */
.faq-preview-list {
  max-width: 900px;
}

/* 对接准备入口 */
.prepare-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 40px;
  align-items: start;
}

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

.prepare-points {
  margin-top: 20px;
}

.prepare-point {
  position: relative;
  padding-left: 22px;
  color: var(--ink-soft);
}

.prepare-point + .prepare-point {
  margin-top: 12px;
}

.prepare-point::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 0;
  width: 10px;
  height: 10px;
  background-color: var(--teal);
  border-radius: 50%;
}

.prepare-copy .btn {
  margin-top: 26px;
}

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

.prepare-media img {
  aspect-ratio: 5 / 4;
}

/* 站内栏目索引 */
.column-index {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 18px;
}

.column-index-item {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 18px 16px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.column-index-title {
  font-size: 16.5px;
  font-weight: 700;
}

.column-index-desc {
  flex: 1 1 auto;
  margin-top: 8px;
  color: var(--ink-mute);
  font-size: 14.5px;
  line-height: 1.65;
}

.column-index-link {
  margin-top: 12px;
  color: var(--navy-soft);
  font-size: 15px;
  font-weight: 600;
  text-decoration: underline;
}

.column-index-link:hover {
  color: var(--amber);
}

/* 4.2 服务方向页 */
.page-layout {
  width: 100%;
}

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

.page-sidebar {
  min-width: 0;
  padding: 20px 18px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.sidebar-title {
  font-size: 17px;
  font-weight: 700;
}

.sidebar-note {
  margin-top: 8px;
  color: var(--ink-mute);
  font-size: 14.5px;
  line-height: 1.65;
}

.anchor-list {
  margin-top: 16px;
}

.anchor-item + .anchor-item {
  margin-top: 8px;
}

.anchor-link {
  display: block;
  padding: 8px 10px;
  color: var(--navy-soft);
  font-size: 15px;
  text-decoration: none;
  border-left: 3px solid var(--line);
  background-color: var(--paper);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.anchor-link:hover {
  color: var(--amber);
  border-left-color: var(--amber);
}

.sidebar-footnote {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.sidebar-footnote .text-link + .text-link {
  margin-left: 12px;
}

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

/* 服务方向分组 */
.service-group {
  margin-top: 34px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.service-group:first-of-type {
  margin-top: 26px;
}

.service-group-head {
  max-width: 780px;
}

.service-group-title {
  font-size: 20px;
  font-weight: 700;
}

.service-group-desc {
  margin-top: 8px;
  color: var(--ink-soft);
  font-size: 15.5px;
}

.service-list {
  margin-top: 18px;
}

.service-item {
  padding: 18px 20px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.service-item + .service-item {
  margin-top: 12px;
}

.service-index {
  display: inline-block;
  margin-right: 10px;
  color: var(--amber);
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 700;
}

.service-item-name {
  display: inline;
  font-size: 17.5px;
  font-weight: 700;
}

.service-item-scene {
  margin-top: 10px;
  color: var(--ink-soft);
}

.service-item-include {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--line-strong);
  color: var(--ink-mute);
  font-size: 14.5px;
}

.section-service-media .media-figure {
  max-width: 780px;
}

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

/* 选择建议 */
.advice-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}

.advice-item {
  min-width: 0;
  padding: 20px 18px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  border-radius: var(--radius);
}

.advice-title {
  font-size: 17px;
  font-weight: 700;
}

.advice-text {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 15.5px;
}

.section-service-advice .section-footnote .text-link + .text-link {
  margin-left: 16px;
}

/* 4.3 方法与流程页 */
.process-path {
  padding-top: 8px;
}

.stage-track {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin-top: 26px;
}

.stage-item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  min-width: 0;
  padding: 18px 16px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.stage-marker {
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.stage-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background-color: var(--teal-soft);
  color: var(--teal);
  font-size: 14px;
  font-weight: 700;
  border-radius: 50%;
}

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

.stage-body .stage-name {
  font-size: 18px;
  font-weight: 700;
}

.stage-body .stage-goal {
  margin-top: 8px;
  color: var(--ink-soft);
  font-size: 15.5px;
}

.process-detail {
  margin-top: 56px;
}

.stage-detail {
  margin-top: 26px;
  padding: 24px 22px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.stage-detail .stage-figure {
  max-width: 100%;
}

.stage-detail .stage-figure img {
  aspect-ratio: 16 / 7;
}

.stage-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 26px;
  margin-top: 22px;
}

.stage-col {
  min-width: 0;
  padding: 18px 18px 16px;
  background-color: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.stage-col-title {
  font-size: 16.5px;
  font-weight: 700;
}

.stage-col-output .stage-col-title {
  color: var(--teal);
}

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

.stage-list-item {
  position: relative;
  padding-left: 20px;
  color: var(--ink-soft);
  font-size: 15.5px;
}

.stage-list-item + .stage-list-item {
  margin-top: 10px;
}

.stage-list-item::before {
  content: "";
  position: absolute;
  top: 11px;
  left: 2px;
  width: 8px;
  height: 8px;
  background-color: var(--line-strong);
  border-radius: 2px;
}

.stage-col-output .stage-list-item::before {
  background-color: var(--teal);
}

.process-change {
  margin-top: 56px;
}

.process-change .change-list {
  margin-top: 24px;
}

.process-change .change-item {
  padding: 18px 20px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.process-change .change-item + .change-item {
  margin-top: 12px;
}

.change-title,
.change-name {
  font-size: 17px;
  font-weight: 700;
}

.change-desc,
.change-text {
  margin-top: 8px;
  color: var(--ink-soft);
  font-size: 15.5px;
}

.process-crosslink {
  margin-top: 26px;
  color: var(--ink-mute);
  font-size: 15px;
}

.process-crosslink a + a {
  margin-left: 16px;
}

/* 4.4 交付标准页 */
.boundary-section {
  padding-top: 0;
  border-bottom: none;
}

.boundary-section .section-head {
  max-width: 860px;
  margin-bottom: 24px;
}

.boundary-section .section-figure {
  max-width: 100%;
  margin-bottom: 28px;
}

.boundary-section .section-figure img {
  aspect-ratio: 16 / 7;
}

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

.boundary-col-title {
  font-size: 18px;
  font-weight: 700;
}

.boundary-col-included {
  border-top: 3px solid var(--teal);
}

.boundary-col-excluded {
  border-top: 3px solid var(--amber);
}

.boundary-col-included .boundary-item::before {
  background-color: var(--teal);
}

.boundary-col-excluded .boundary-item::before {
  background-color: var(--amber);
}

.boundary-label {
  display: inline-block;
  margin-right: 8px;
  padding: 1px 8px;
  font-size: 13px;
  font-weight: 700;
  border-radius: var(--radius-sm);
}

.boundary-col-included .boundary-label {
  background-color: var(--teal-soft);
  color: var(--teal);
}

.boundary-col-excluded .boundary-label {
  background-color: var(--amber-soft);
  color: var(--amber);
}

.boundary-text {
  color: var(--ink-soft);
  font-size: 15.5px;
}

.acceptance-section {
  margin-top: 56px;
  padding-top: 0;
  border-bottom: none;
}

.acceptance-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
  margin-top: 8px;
}

.acceptance-item {
  min-width: 0;
  padding: 20px 18px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-left: 3px solid var(--navy-soft);
  border-radius: var(--radius);
}

.acceptance-name {
  font-size: 17px;
  font-weight: 700;
}

.acceptance-text {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 15.5px;
}

.change-section {
  margin-top: 56px;
  padding-top: 0;
  border-bottom: none;
}

.change-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 34px;
  align-items: start;
}

.change-section .change-list {
  margin-top: 0;
}

.change-section .change-item {
  padding: 18px 20px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

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

.change-aside {
  min-width: 0;
  padding: 20px 18px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.aside-title {
  font-size: 16.5px;
  font-weight: 700;
}

.aside-text {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 15px;
}

.aside-links {
  margin-top: 14px;
}

.aside-link-item + .aside-link-item {
  margin-top: 8px;
}

.aside-link {
  color: var(--navy-soft);
  font-size: 15px;
  font-weight: 600;
  text-decoration: underline;
}

.aside-link:hover {
  color: var(--amber);
}

/* 4.5 常见问题页 */
.faq-section {
  padding: 44px 0;
  border-bottom: 1px solid var(--line);
}

.faq-section:first-of-type {
  padding-top: 0;
  border-bottom: none;
}

.faq-section .section-desc {
  max-width: 860px;
}

.faq-figure {
  max-width: 820px;
  margin: 22px 0 24px;
}

.faq-figure img {
  aspect-ratio: 16 / 7;
}

.faq-section .faq-item {
  max-width: 900px;
}

.faq-next {
  padding: 44px 0 0;
}

.faq-next-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 18px;
  margin-top: 22px;
}

.faq-next-item {
  min-width: 0;
  padding: 20px 18px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--navy-soft);
  border-radius: var(--radius);
}

.faq-next-heading {
  font-size: 17px;
  font-weight: 700;
}

.faq-next-item p {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 15.5px;
}

/* 4.6 对接准备页 */
.section-audience {
  padding-top: 0;
  border-bottom: none;
}

.audience-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
  margin-top: 26px;
}

.audience-item {
  min-width: 0;
  padding: 20px 18px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  border-radius: var(--radius);
}

.audience-name {
  font-size: 17px;
  font-weight: 700;
}

.audience-desc {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 15.5px;
}

.section-checklist {
  margin-top: 56px;
  padding-top: 0;
  border-bottom: none;
}

.section-checklist .media-figure {
  max-width: 820px;
  margin: 26px 0 28px;
}

.section-checklist .media-figure img {
  aspect-ratio: 16 / 7;
}

.checklist {
  border-top: 1px solid var(--line);
}

.checklist-row {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 22px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.checklist-term {
  color: var(--navy);
  font-weight: 700;
}

.checklist-desc {
  color: var(--ink-soft);
  font-size: 15.5px;
}

.section-advance {
  margin-top: 56px;
  padding-top: 0;
  border-bottom: none;
}

.advance-list {
  margin-top: 26px;
}

.advance-item {
  padding: 18px 20px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.advance-item + .advance-item {
  margin-top: 12px;
}

.advance-name {
  font-size: 17px;
  font-weight: 700;
}

.advance-desc {
  margin-top: 8px;
  color: var(--ink-soft);
  font-size: 15.5px;
}

.feedback-list {
  margin-top: 16px;
}

.feedback-item {
  position: relative;
  padding-left: 20px;
  color: var(--ink-soft);
  font-size: 15.5px;
}

.feedback-item + .feedback-item {
  margin-top: 10px;
}

.feedback-item::before {
  content: "";
  position: absolute;
  top: 11px;
  left: 2px;
  width: 8px;
  height: 8px;
  background-color: var(--teal);
  border-radius: 2px;
}

/* 4.7 404 页 */
.error-main {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 64px var(--gutter) 72px;
}

.error-hero {
  max-width: 760px;
}

.error-code {
  color: var(--amber);
  font-size: 15px;
  font-weight: 700;
}

.error-title {
  margin-top: 12px;
  font-size: 34px;
  font-weight: 700;
}

.error-desc {
  margin-top: 16px;
  color: var(--ink-soft);
}

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

.error-links {
  margin-top: 52px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}

.error-link-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 14px;
  margin-top: 20px;
}

.error-link-item {
  min-width: 0;
}

.error-link {
  display: block;
  padding: 16px 18px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--navy-soft);
  font-weight: 600;
  text-decoration: none;
}

.error-link:hover {
  border-color: var(--amber);
  color: var(--amber);
}

/* --------------------------------------------------------------------------
   5. responsive — 960px / 640px 断点
   -------------------------------------------------------------------------- */
@media (max-width: 960px) {
  .header-inner {
    flex-wrap: wrap;
    gap: 12px;
  }

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

  .site-nav {
    flex: 1 0 100%;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 10px 0 4px;
    border-top: 1px solid rgba(255, 255, 255, 0.16);
  }

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

  .nav-link {
    padding: 12px 10px;
    font-size: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 30px;
    padding-top: 40px;
    padding-bottom: 42px;
  }

  .hero-media {
    order: 2;
  }

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

  .column-index {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

  .sidebar-left .page-sidebar {
    order: 2;
  }

  .sidebar-left .page-content {
    order: 1;
  }

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

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

@media (max-width: 640px) {
  body {
    font-size: 16.5px;
  }

  :root {
    --gutter: 18px;
  }

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

  .brand-tagline {
    font-size: 12px;
  }

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

  .section {
    padding: 40px 0;
  }

  .section-title {
    font-size: 21px;
  }

  .inner-main {
    padding-bottom: 52px;
  }

  .page-header {
    padding-bottom: 26px;
    margin-bottom: 30px;
  }

  .hero-facts {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .hero-actions .btn {
    flex: 1 1 auto;
  }

  .direction-item {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 14px;
  }

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

  .stage-media-row,
  .boundary-columns,
  .boundary-grid,
  .stage-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .column-index {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

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

  .checklist-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

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

  .stage-index {
    width: 34px;
    height: 34px;
  }

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

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .process-crosslink a {
    display: block;
    margin-left: 0;
  }

  .process-crosslink a + a {
    margin-top: 8px;
  }

  .sidebar-footnote .text-link {
    display: inline-block;
  }

  .sidebar-footnote .text-link + .text-link {
    margin-left: 0;
    margin-top: 8px;
  }

  .section-service-advice .section-footnote .text-link {
    display: block;
  }

  .section-service-advice .section-footnote .text-link + .text-link {
    margin-left: 0;
    margin-top: 8px;
  }
}

/* 减弱动效偏好下关闭滚动平滑 */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .btn {
    transition: none;
  }
}