/* ==========================================================================
   秋霞电视剧影院 · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* ==========================================================================
   base
   ========================================================================== */

:root {
  --color-primary: #1F3A5F;
  --color-primary-soft: #2C4E7A;
  --color-accent: #C8A15A;
  --color-accent-soft: #E4D3B0;
  --color-neutral: #F5F6F8;
  --color-neutral-deep: #ECEFF3;
  --color-text: #2B2F36;
  --color-text-soft: #5C646F;
  --color-border: #DDE1E6;
  --color-surface: #FFFFFF;
  --shadow-card: 0 1px 2px rgba(31, 58, 95, 0.06), 0 6px 18px rgba(31, 58, 95, 0.06);
  --shadow-card-hover: 0 2px 4px rgba(31, 58, 95, 0.08), 0 12px 26px rgba(31, 58, 95, 0.1);
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shell-width: 1120px;
  --shell-gutter: 24px;
}

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

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

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-surface);
  font-variant-numeric: tabular-nums;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-primary);
}

p {
  margin: 0;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease;
}

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

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

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

figure {
  margin: 0;
}

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

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

/* ==========================================================================
   layout · 全站骨架
   ========================================================================== */

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--color-surface);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 14px var(--shell-gutter);
}

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

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

.brand-mark {
  display: inline-block;
  width: 26px;
  height: 26px;
  border-radius: var(--radius-sm);
  background-color: var(--color-primary);
  box-shadow: inset 0 0 0 4px var(--color-accent);
}

.brand-name {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

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

.site-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: flex-end;
}

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

.nav-item {
  display: block;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  border-radius: var(--radius-md);
  font-size: 15px;
  color: var(--color-text);
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--color-primary);
  background-color: var(--color-neutral);
}

.nav-link.is-current {
  color: var(--color-primary);
  font-weight: 600;
  background-color: var(--color-neutral-deep);
}

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

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

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

.site-main {
  flex: 1 1 auto;
  width: 100%;
}

.inner-main {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 28px var(--shell-gutter) 64px;
}

/* 面包屑 -------------------------------------------------------------- */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  font-size: 14px;
  color: var(--color-text-soft);
}

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

.breadcrumb a:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-accent);
}

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

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

/* 页面标题区（内页统一） ---------------------------------------------- */

.page-header {
  padding-bottom: 22px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--color-border);
}

.page-title {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-primary);
}

.page-description {
  max-width: 820px;
  margin-top: 12px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text-soft);
}

.page-description a {
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-accent-soft);
}

.page-description a:hover {
  border-bottom-color: var(--color-accent);
}

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

.site-footer {
  margin-top: auto;
  background-color: var(--color-primary);
  color: #D6DEE9;
}

.footer-top {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 16px var(--shell-gutter) 0;
}

.back-to-main {
  display: inline-block;
  font-size: 14px;
  color: #B9C7D9;
}

.back-to-main:hover {
  color: #FFFFFF;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 32px;
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 28px var(--shell-gutter) 32px;
}

.footer-brand-name {
  font-size: 17px;
  font-weight: 600;
  color: #FFFFFF;
}

.footer-brand-desc {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.75;
  color: #B9C7D9;
}

.footer-col-title {
  font-size: 15px;
  font-weight: 600;
  color: #FFFFFF;
  margin-bottom: 12px;
}

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

.footer-list a {
  display: inline-block;
  padding: 2px 0;
  font-size: 14px;
  color: #B9C7D9;
}

.footer-list a:hover {
  color: #FFFFFF;
}

.footer-bottom {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 16px var(--shell-gutter) 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  font-size: 13px;
  color: #9FB0C6;
}

/* ==========================================================================
   components · 通用组件
   ========================================================================== */

/* 顶部信息条 ---------------------------------------------------------- */

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

.topbar-text {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 9px var(--shell-gutter);
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-text-soft);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  transition: background-color 0.18s ease, color 0.18s ease,
    border-color 0.18s ease, box-shadow 0.18s ease;
}

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

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

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

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

/* 区块标题 ------------------------------------------------------------ */

.section-title {
  font-size: 22px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-primary);
}

.section-desc,
.section-intro {
  margin-top: 10px;
  max-width: 780px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-soft);
}

.section-intro a,
.section-desc a {
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-accent-soft);
}

.section-intro a:hover,
.section-desc a:hover {
  border-bottom-color: var(--color-accent);
}

.section-head {
  margin-bottom: 24px;
}

.section-more {
  margin-top: 22px;
  font-size: 15px;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  color: var(--color-primary);
  font-weight: 600;
  border-bottom: 1px solid var(--color-accent);
  padding-bottom: 2px;
}

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

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

.media,
.media-figure,
.hero-figure,
.matrix-figure,
.process-figure,
.stage-media,
.faq-figure,
.delivery-figure {
  overflow: hidden;
  border-radius: var(--radius-lg);
  background-color: var(--color-neutral);
}

.media img,
.media-figure img,
.hero-image,
.matrix-figure img,
.process-figure img,
.stage-media img,
.faq-figure img,
.delivery-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.figure-caption,
.media-caption,
figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-text-soft);
}

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

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
}

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

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 52px;
  padding: 14px 16px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: var(--color-neutral-deep);
  color: var(--color-primary);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
}

.faq-item[open] .faq-question::after {
  content: "−";
  background-color: var(--color-accent-soft);
}

.faq-answer {
  padding: 14px 16px 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-soft);
  border-top: 1px solid var(--color-border);
}

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

/* 核对清单 ------------------------------------------------------------ */

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

.check-item {
  position: relative;
  padding-left: 26px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-text-soft);
}

.check-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 14px;
  height: 14px;
  border: 2px solid var(--color-accent);
  border-radius: 3px;
}

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

.table-scroll,
.delivery-table-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.delivery-table,
.flow-table {
  min-width: 640px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
}

.delivery-table caption,
.flow-table caption,
.table-caption,
.flow-caption {
  padding: 12px 4px;
  text-align: left;
  font-size: 14px;
  color: var(--color-text-soft);
  caption-side: top;
}

.delivery-table th,
.delivery-table td,
.flow-table th,
.flow-table td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--color-border);
  line-height: 1.7;
}

.delivery-table thead th,
.flow-table thead th {
  background-color: var(--color-neutral);
  color: var(--color-primary);
  font-weight: 600;
  white-space: nowrap;
}

.delivery-table tbody th,
.flow-table tbody th {
  background-color: var(--color-neutral);
  color: var(--color-primary);
  font-weight: 600;
  white-space: nowrap;
}

.delivery-table tbody tr:last-child th,
.delivery-table tbody tr:last-child td,
.flow-table tbody tr:last-child th,
.flow-table tbody tr:last-child td {
  border-bottom: none;
}

.delivery-table tbody tr:hover td,
.flow-table tbody tr:hover td {
  background-color: #FAFBFC;
}

/* 侧栏布局 ------------------------------------------------------------ */

.layout-shell {
  display: grid;
  gap: 32px;
  align-items: start;
}

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

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

/* 分组树 / 侧栏 ------------------------------------------------------- */

.group-tree,
.side-rail {
  position: sticky;
  top: 88px;
  padding: 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-neutral);
}

.group-tree-title,
.rail-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.group-tree-list,
.rail-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.group-tree-link,
.rail-link {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text);
  border-left: 3px solid transparent;
}

.group-tree-link:hover,
.rail-link:hover {
  background-color: var(--color-surface);
  color: var(--color-primary);
}

.group-tree-link.is-active,
.rail-link.is-active {
  background-color: var(--color-surface);
  border-left-color: var(--color-accent);
  color: var(--color-primary);
  font-weight: 600;
}

.group-tree-note,
.rail-note {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--color-border);
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-text-soft);
}

/* ==========================================================================
   pages · 首页
   ========================================================================== */

.home-main {
  display: block;
}

/* 首屏 ---------------------------------------------------------------- */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  align-items: stretch;
  gap: 0;
  background-color: var(--color-neutral);
  border-bottom: 1px solid var(--color-border);
}

.hero-figure {
  position: relative;
  min-height: 380px;
  border-radius: 0;
  background-color: var(--color-neutral-deep);
}

.hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 16px;
  padding: 56px 48px;
  max-width: 640px;
}

.hero-eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.hero-title {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-primary);
}

.hero-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text-soft);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

/* 快速入口 ------------------------------------------------------------ */

.quick-entry {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 48px var(--shell-gutter) 8px;
}

.quick-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 22px;
}

.quick-item {
  display: flex;
}

.quick-link {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
  padding: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
  transition: border-color 0.18s ease, box-shadow 0.18s ease,
    transform 0.18s ease;
}

.quick-link:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.quick-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
}

.quick-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-soft);
}

/* 服务矩阵概览 -------------------------------------------------------- */

.matrix-overview {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 56px var(--shell-gutter) 8px;
}

.matrix-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr);
  gap: 28px;
  align-items: start;
}

.matrix-figure {
  position: relative;
  min-height: 240px;
  background-color: var(--color-neutral-deep);
}

.matrix-figure img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.matrix-figure .figure-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 10px 14px;
  background-color: rgba(31, 58, 95, 0.82);
  color: #FFFFFF;
  font-size: 13px;
}

.matrix-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.matrix-tag {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 4px 12px;
  border-radius: 999px;
  background-color: var(--color-accent-soft);
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
}

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

.matrix-item {
  padding: 16px 18px;
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  transition: box-shadow 0.18s ease;
}

.matrix-item:hover {
  box-shadow: var(--shadow-card);
}

.matrix-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
}

.matrix-audience,
.matrix-scope {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-soft);
}

.matrix-audience {
  color: var(--color-text);
}

/* 合作流程预览 -------------------------------------------------------- */

.process-preview {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 56px var(--shell-gutter) 8px;
}

.process-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr);
  gap: 28px;
  align-items: start;
}

.process-figure {
  position: relative;
  min-height: 240px;
  background-color: var(--color-neutral-deep);
}

.process-figure img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.process-figure .figure-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 10px 14px;
  background-color: rgba(31, 58, 95, 0.82);
  color: #FFFFFF;
  font-size: 13px;
}

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

.process-step {
  position: relative;
  padding: 18px 18px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
}

.process-step .step-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: #FFFFFF;
  font-size: 13px;
  font-weight: 600;
}

.process-step .step-name {
  margin-top: 10px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
}

.process-step .step-input,
.process-step .step-output,
.process-step .step-flow {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-soft);
}

.process-step .step-flow {
  padding-top: 8px;
  border-top: 1px dashed var(--color-border);
  color: var(--color-text);
}

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

.standard-summary {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 56px var(--shell-gutter) 8px;
}

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

.standard-col {
  padding: 22px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-neutral);
}

.standard-col .col-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 14px;
}

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

.faq-summary {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 56px var(--shell-gutter) 8px;
}

.faq-group + .faq-group {
  margin-top: 22px;
}

.faq-group-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
}

/* 站内页面索引 -------------------------------------------------------- */

.site-index {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 56px var(--shell-gutter) 72px;
}

.index-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}

.index-item {
  display: flex;
}

.index-link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 100%;
  padding: 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.index-link:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-card);
}

.index-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
}

.index-desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-text-soft);
}

/* ==========================================================================
   pages · 服务矩阵
   ========================================================================== */

.section {
  margin-bottom: 48px;
}

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

.section-overview .media-wide {
  position: relative;
  min-height: 260px;
  margin: 22px 0 24px;
  background-color: var(--color-neutral-deep);
}

.section-overview .media-wide img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.section-overview .media-wide figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 10px 14px;
  background-color: rgba(31, 58, 95, 0.82);
  color: #FFFFFF;
  font-size: 13px;
}

.overview-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.overview-item {
  padding: 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
  transition: box-shadow 0.18s ease;
}

.overview-item:hover {
  box-shadow: var(--shadow-card);
}

.overview-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
}

.overview-scope {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-soft);
}

/* 分组适用对象 -------------------------------------------------------- */

.audience-block {
  padding: 22px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
}

.audience-block + .audience-block {
  margin-top: 18px;
}

.audience-block > h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
}

.media-inline {
  position: relative;
  min-height: 200px;
  margin-bottom: 18px;
  background-color: var(--color-neutral-deep);
}

.media-inline img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-inline figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 9px 14px;
  background-color: rgba(31, 58, 95, 0.82);
  color: #FFFFFF;
  font-size: 13px;
}

.audience-pair {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 8px 16px;
  margin: 0;
}

.audience-pair dt {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  padding: 6px 0;
}

.audience-pair dd {
  margin: 0;
  padding: 6px 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-soft);
}

/* 交付内容表（服务矩阵页） -------------------------------------------- */

.section-delivery .delivery-table-wrap {
  margin-top: 20px;
}

.delivery-note {
  margin-top: 14px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-soft);
}

.delivery-note a {
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-accent-soft);
}

.delivery-note a:hover {
  border-bottom-color: var(--color-accent);
}

/* 服务边界 ------------------------------------------------------------ */

.boundary-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.boundary-item {
  padding: 14px 16px 14px 40px;
  position: relative;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-neutral);
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-soft);
}

.boundary-item::before {
  content: "×";
  position: absolute;
  left: 14px;
  top: 13px;
  width: 18px;
  height: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: var(--color-border);
  color: var(--color-text-soft);
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
}

/* ==========================================================================
   pages · 合作流程
   ========================================================================== */

.stage-overview,
.stage-detail,
.stage-flow,
.prepare-section {
  margin-bottom: 48px;
}

.stage-track {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}

.stage-item {
  position: relative;
  padding: 20px 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
}

.stage-item::after {
  content: "";
  position: absolute;
  right: -14px;
  top: 50%;
  width: 14px;
  height: 1px;
  background-color: var(--color-border);
}

.stage-item:last-child::after {
  display: none;
}

.stage-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
  background-color: var(--color-primary);
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 600;
}

.stage-name {
  margin-top: 12px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
}

.stage-outcome {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-soft);
}

/* 阶段细节 ------------------------------------------------------------ */

.stage-block-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 22px;
}

.stage-block {
  padding: 22px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
}

.stage-block-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.stage-block-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 600;
}

.stage-block-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-primary);
}

.stage-media {
  position: relative;
  min-height: 220px;
  margin-bottom: 18px;
  background-color: var(--color-neutral-deep);
}

.stage-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.stage-media figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 9px 14px;
  background-color: rgba(31, 58, 95, 0.82);
  color: #FFFFFF;
  font-size: 13px;
}

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

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

.stage-col-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 10px;
}

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

.stage-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-soft);
}

.stage-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

/* 阶段流转表 ---------------------------------------------------------- */

.stage-flow .table-scroll {
  margin-top: 20px;
}

/* 启动前准备 ---------------------------------------------------------- */

.prepare-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 22px;
}

.prepare-item {
  padding: 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-neutral);
}

.prepare-item-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
}

.prepare-item-desc {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-soft);
}

.prepare-note {
  margin-top: 18px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-soft);
}

.prepare-note a {
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-accent-soft);
}

.prepare-note a:hover {
  border-bottom-color: var(--color-accent);
}

/* ==========================================================================
   pages · 交付标准
   ========================================================================== */

.section-delivery-list,
.section-delivery-form,
.section-quality,
.section-acceptance {
  margin-bottom: 48px;
}

.section-delivery-list .section-title,
.section-delivery-form .section-title,
.section-quality .section-title,
.section-acceptance .section-title {
  margin-bottom: 8px;
}

.delivery-layout {
  margin-top: 24px;
}

/* 交付物类别侧栏 ------------------------------------------------------ */

.delivery-rail {
  min-width: 0;
}

/* 交付物形式 ---------------------------------------------------------- */

.delivery-figure {
  position: relative;
  min-height: 240px;
  margin: 22px 0 24px;
  background-color: var(--color-neutral-deep);
}

.delivery-figure img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.delivery-figure .media-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 10px 14px;
  background-color: rgba(31, 58, 95, 0.82);
  color: #FFFFFF;
  font-size: 13px;
}

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

.form-card {
  padding: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
  transition: box-shadow 0.18s ease;
}

.form-card:hover {
  box-shadow: var(--shadow-card);
}

.form-card .card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
}

.form-card .card-text {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-soft);
}

.form-card .card-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--color-border);
}

.form-card .card-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-soft);
}

.form-card .card-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

/* 质量核对 ------------------------------------------------------------ */

.quality-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}

.quality-item {
  padding: 18px;
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
  background-color: var(--color-neutral);
}

.quality-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
}

.quality-basis {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-soft);
}

/* 验收方式与偏差处理 -------------------------------------------------- */

.acceptance-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 22px;
}

.acceptance-col {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
}

.acceptance-col .col-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
}

.acceptance-steps {
  display: flex;
  flex-direction: column;
  gap: 14px;
  counter-reset: acceptance;
}

.acceptance-step {
  position: relative;
  padding-left: 34px;
}

.acceptance-step::before {
  counter-increment: acceptance;
  content: counter(acceptance);
  position: absolute;
  left: 0;
  top: 2px;
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: #FFFFFF;
  font-size: 13px;
  font-weight: 600;
}

.acceptance-step .step-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
}

.acceptance-step .step-text {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-soft);
}

.section-outro {
  margin-top: 22px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text-soft);
}

.section-outro a {
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-accent-soft);
}

.section-outro a:hover {
  border-bottom-color: var(--color-accent);
}

/* ==========================================================================
   pages · 常见问题
   ========================================================================== */

.page-layout {
  display: block;
}

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

.faq-group .section-title {
  margin-bottom: 8px;
}

.faq-group .section-intro {
  margin-bottom: 20px;
}

.faq-group .faq-figure {
  position: relative;
  min-height: 220px;
  margin-bottom: 20px;
  background-color: var(--color-neutral-deep);
}

.faq-group .faq-figure img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.faq-group .faq-figure figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 9px 14px;
  background-color: rgba(31, 58, 95, 0.82);
  color: #FFFFFF;
  font-size: 13px;
}

.faq-self-check {
  margin-bottom: 40px;
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-neutral);
}

.faq-self-check .section-title {
  margin-bottom: 8px;
}

.faq-self-check .section-intro {
  margin-bottom: 18px;
}

.faq-self-check .faq-figure {
  position: relative;
  min-height: 200px;
  margin-top: 20px;
  background-color: var(--color-neutral-deep);
}

.faq-self-check .faq-figure img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.faq-self-check .faq-figure figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 9px 14px;
  background-color: rgba(31, 58, 95, 0.82);
  color: #FFFFFF;
  font-size: 13px;
}

.faq-related {
  padding-top: 8px;
}

.faq-related .section-title {
  margin-bottom: 8px;
}

.faq-related .section-intro {
  margin-bottom: 18px;
}

.related-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.related-item {
  display: flex;
}

.related-item a {
  display: flex;
  align-items: center;
  width: 100%;
  min-height: 56px;
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.related-item a:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-card);
}

/* ==========================================================================
   pages · 404
   ========================================================================== */

.error-main {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 56px var(--shell-gutter) 72px;
}

.error-panel {
  padding: 40px 32px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-neutral);
}

.error-title {
  font-size: 30px;
  font-weight: 700;
  color: var(--color-primary);
}

.error-text {
  margin-top: 12px;
  max-width: 720px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text-soft);
}

.error-actions {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 26px;
}

.error-link {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  text-align: center;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.error-link:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-card);
}

.error-hint {
  margin-top: 36px;
}

.error-hint-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-primary);
}

.error-hint-text {
  margin-top: 10px;
  max-width: 780px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-soft);
}

.error-hint-text + .error-hint-text {
  margin-top: 8px;
}

/* ==========================================================================
   responsive
   ========================================================================== */

@media (max-width: 1024px) {
  .footer-inner {
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
    gap: 24px;
  }

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

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

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

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

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

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

@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: block;
    padding: 0 var(--shell-gutter);
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-card);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 14px;
  }

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

  .nav-item {
    width: 100%;
  }

  .nav-link {
    width: 100%;
    min-height: 48px;
    padding: 0 12px;
    border-radius: var(--radius-sm);
  }

  .header-inner {
    position: relative;
  }

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

  .hero-figure {
    min-height: 240px;
  }

  .hero-content {
    max-width: none;
    padding: 32px var(--shell-gutter) 36px;
  }

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

  .matrix-figure,
  .process-figure {
    min-height: 220px;
  }

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

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

  .group-tree,
  .side-rail {
    position: static;
  }

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

  .stage-item::after {
    display: none;
  }

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

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

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

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

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

@media (max-width: 600px) {
  :root {
    --shell-gutter: 20px;
  }

  body {
    font-size: 15px;
  }

  .header-inner {
    padding: 12px var(--shell-gutter);
  }

  .brand-name {
    font-size: 16px;
  }

  .topbar-text {
    font-size: 12.5px;
  }

  .inner-main {
    padding: 20px var(--shell-gutter) 48px;
  }

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

  .page-header {
    padding-bottom: 18px;
    margin-bottom: 24px;
  }

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

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

  .hero-content {
    padding: 26px var(--shell-gutter) 30px;
  }

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

  .btn {
    width: 100%;
  }

  .quick-entry,
  .matrix-overview,
  .process-preview,
  .standard-summary,
  .faq-summary,
  .site-index {
    padding-left: var(--shell-gutter);
    padding-right: var(--shell-gutter);
  }

  .quick-list,
  .matrix-list,
  .process-list,
  .index-list,
  .stage-track,
  .prepare-list,
  .related-list,
  .error-actions {
    grid-template-columns: minmax(0, 1fr);
  }

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

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

  .audience-pair dt {
    padding-top: 10px;
  }

  .audience-pair dd {
    padding-top: 0;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 24px var(--shell-gutter) 28px;
  }

  .faq-question {
    padding: 13px 14px;
    font-size: 14.5px;
  }

  .faq-answer {
    padding: 12px 14px 14px;
    font-size: 14px;
  }

  .error-panel {
    padding: 28px 20px;
  }

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