/* ==========================================================================
   秋霞伦理片 · qz-bt.com 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base · 变量与全局
   -------------------------------------------------------------------------- */
:root {
  --bg: #f6f3ee;
  --ink: #1f3a34;
  --ink-soft: #2b2b28;
  --copper: #a97142;
  --muted: #8a8578;
  --card: #fffdfa;
  --line: #ddd6ca;
  --line-strong: #c3b9a8;
  --radius: 6px;
  --radius-sm: 4px;
  --shadow: 0 1px 0 rgba(31, 58, 52, 0.06);
  --serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "SimSun", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, "Courier New", monospace;
  --wrap: 1160px;
  --gap: 24px;
}

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

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

.site-body {
  margin: 0;
  background: var(--bg);
  color: var(--ink-soft);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
h4 {
  font-family: var(--serif);
  color: var(--ink);
  line-height: 1.35;
  margin: 0 0 12px;
}

p {
  margin: 0 0 14px;
}

a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid rgba(169, 113, 66, 0.35);
  transition: color 0.15s ease, border-color 0.15s ease;
}

a:hover,
a:focus-visible {
  color: var(--copper);
  border-bottom-color: var(--copper);
}

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

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

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

figure {
  margin: 0;
}

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

/* --------------------------------------------------------------------------
   layout · 顶部信息条 / 页头 / 导航骨架
   -------------------------------------------------------------------------- */
.top-bar {
  background: var(--ink);
  color: #e8e3d9;
  padding: 8px 20px;
}

.top-bar-text {
  max-width: var(--wrap);
  margin: 0 auto;
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: 0.01em;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: var(--card);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 20px;
  min-height: 66px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border-bottom: 0;
  flex: 0 0 auto;
}

.brand-mark {
  width: 26px;
  height: 26px;
  border: 1px solid var(--ink);
  border-radius: 3px;
  position: relative;
  flex: 0 0 auto;
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 6px;
  background: var(--copper);
  border-radius: 1px;
}

.brand-name {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.02em;
}

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  padding: 11px 10px;
  flex-direction: column;
  justify-content: space-between;
}

.nav-toggle-bar {
  display: block;
  height: 2px;
  background: var(--ink);
  border-radius: 1px;
}

.site-nav {
  margin-left: auto;
}

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

.nav-item {
  position: relative;
}

.nav-item > a {
  display: inline-block;
  padding: 10px 14px;
  font-size: 15px;
  color: var(--ink-soft);
  border-bottom: 0;
  border-radius: var(--radius-sm);
}

.nav-item > a:hover {
  background: rgba(31, 58, 52, 0.06);
  color: var(--ink);
}

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

.dropdown-toggle {
  width: 30px;
  height: 34px;
  margin-left: -6px;
  border-radius: var(--radius-sm);
  color: var(--muted);
  font-size: 11px;
  line-height: 1;
}

.dropdown-toggle::after {
  content: "▾";
}

.dropdown-toggle[aria-expanded="true"]::after {
  content: "▴";
}

.dropdown-list {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 210px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 6px 18px rgba(31, 58, 52, 0.08);
  padding: 6px;
  display: none;
}

.dropdown-list.is-open {
  display: block;
}

.dropdown-list li a {
  display: block;
  padding: 9px 12px;
  font-size: 14px;
  border-bottom: 0;
  border-radius: var(--radius-sm);
}

.dropdown-list li a:hover {
  background: rgba(169, 113, 66, 0.1);
}

/* --------------------------------------------------------------------------
   layout · 主内容容器与内页骨架
   -------------------------------------------------------------------------- */
.site-main {
  display: block;
}

.home-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 20px 64px;
}

.inner-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 26px 20px 64px;
}

.breadcrumb {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 18px;
}

.breadcrumb a {
  color: var(--muted);
  border-bottom-color: rgba(138, 133, 120, 0.4);
}

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

.breadcrumb-sep {
  margin: 0 8px;
  color: var(--line-strong);
}

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

.page-header {
  border-bottom: 1px solid var(--line);
  padding-bottom: 22px;
  margin-bottom: 34px;
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 12px;
  letter-spacing: 0;
}

.page-description {
  max-width: 760px;
  font-size: 15.5px;
  color: var(--ink-soft);
  margin: 0;
}

.page-lead {
  max-width: 760px;
  font-size: 15px;
  color: var(--muted);
  margin: 10px 0 0;
}

/* --------------------------------------------------------------------------
   components · 通用区块
   -------------------------------------------------------------------------- */
.section {
  padding: 40px 0;
  border-top: 1px solid var(--line);
}

.section:first-of-type {
  border-top: 0;
}

.section-head {
  margin-bottom: 22px;
}

.section-title {
  font-size: 24px;
  font-weight: 700;
  margin: 0 0 8px;
}

.section-desc,
.section-text,
.section-intro {
  max-width: 780px;
  font-size: 15px;
  color: var(--ink-soft);
  margin: 0 0 12px;
}

.section-index {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--copper);
  margin: 0 0 6px;
}

.section-more {
  margin: 20px 0 0;
  font-size: 15px;
}

.section-more a {
  font-weight: 600;
}

/* 通用按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
  background: var(--ink);
  color: #f8f5ef;
  border-color: var(--ink);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--copper);
  border-color: var(--copper);
  color: #fffdfa;
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-strong);
}

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

/* 通用图片容器 */
.content-media,
.hero-figure,
.section-media,
.section-figure,
.flow-figure,
.faq-figure {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px;
}

.content-media img,
.hero-figure img,
.section-media img,
.section-figure img,
.flow-figure img,
.faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.content-media figcaption,
.hero-figure figcaption,
.section-media figcaption,
.section-figure figcaption,
.flow-figure figcaption,
.faq-figure-caption,
.figure-caption {
  font-size: 13px;
  color: var(--muted);
  padding: 10px 4px 2px;
  line-height: 1.6;
}

/* 折叠问答 */
.faq-list {
  display: grid;
  gap: 10px;
}

.faq-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0 16px;
}

.faq-item[open] {
  border-color: var(--line-strong);
}

.faq-question {
  cursor: pointer;
  list-style: none;
  padding: 15px 26px 15px 0;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--ink);
  position: relative;
}

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

.faq-question::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--mono);
  color: var(--copper);
  font-size: 17px;
}

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

.faq-answer {
  margin: 0;
  padding: 0 0 16px;
  font-size: 15px;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

/* 栏目索引卡片 */
.index-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}

.index-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 16px;
  border-bottom: 1px solid var(--line);
}

.index-card:hover {
  border-color: var(--copper);
}

.index-no {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--copper);
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.index-name {
  display: block;
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 6px;
}

.index-desc {
  display: block;
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.65;
}

/* --------------------------------------------------------------------------
   components · 页脚
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--ink);
  color: #ddd8cd;
  margin-top: 20px;
}

.footer-top {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 14px 20px 0;
  font-size: 13px;
}

.footer-top a {
  color: #cfc9bc;
  border-bottom-color: rgba(207, 201, 188, 0.4);
}

.footer-top a:hover {
  color: #f0d3b0;
  border-bottom-color: #f0d3b0;
}

.footer-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 26px 20px 30px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

.footer-title {
  font-family: var(--serif);
  font-size: 16px;
  color: #f4efe6;
  margin: 0 0 10px;
}

.footer-text {
  font-size: 13.5px;
  color: #b8b2a5;
  margin: 0 0 10px;
  line-height: 1.7;
}

.footer-list {
  display: grid;
  gap: 8px;
}

.footer-list a {
  color: #cfc9bc;
  font-size: 14px;
  border-bottom: 0;
}

.footer-list a:hover {
  color: #f0d3b0;
}

.footer-bottom {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 20px 26px;
  border-top: 1px solid rgba(255, 253, 250, 0.14);
  padding-top: 16px;
  font-size: 13px;
  color: #a9a396;
}

/* --------------------------------------------------------------------------
   pages · 首页
   -------------------------------------------------------------------------- */
.hero {
  padding: 40px 0 8px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 36px;
  align-items: start;
}

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

.hero-eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--copper);
  margin: 0 0 12px;
}

.hero-title {
  font-size: 38px;
  font-weight: 700;
  margin: 0 0 16px;
}

.hero-lead {
  font-size: 16.5px;
  color: var(--ink-soft);
  margin: 0 0 18px;
}

.hero-points {
  display: grid;
  gap: 10px;
  margin-bottom: 24px;
}

.hero-points li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  color: var(--ink-soft);
}

.hero-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 10px;
  height: 2px;
  background: var(--copper);
}

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

.content-media-primary {
  margin-top: 26px;
}

/* 服务矩阵概览表 */
.section-matrix .matrix-table {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card);
}

.section-matrix .matrix-row {
  display: grid;
  grid-template-columns: 64px minmax(140px, 0.9fr) minmax(150px, 1fr) minmax(220px, 1.6fr) 96px;
  gap: 12px;
  padding: 14px 16px;
  border-top: 1px solid var(--line);
  align-items: center;
}

.section-matrix .matrix-row:first-child {
  border-top: 0;
}

.section-matrix .matrix-head {
  background: rgba(31, 58, 52, 0.05);
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.section-matrix .matrix-row:not(.matrix-head):hover {
  background: rgba(169, 113, 66, 0.06);
}

.matrix-cell {
  font-size: 14.5px;
  min-width: 0;
}

.cell-no {
  font-family: var(--mono);
  color: var(--copper);
  font-size: 13px;
}

.cell-name {
  font-weight: 600;
  color: var(--ink);
}

.cell-target,
.cell-work {
  color: var(--ink-soft);
}

.cell-link a {
  font-size: 14px;
  white-space: nowrap;
}

/* 合作流程四阶段预览 */
.process-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 14px;
}

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

.process-step:hover {
  border-color: var(--copper);
}

.process-step .step-no {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--copper);
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.process-step .step-name {
  font-size: 17px;
  margin: 0 0 8px;
}

.process-step .step-work {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0 0 10px;
}

.process-step .step-output {
  font-size: 13px;
  color: var(--muted);
  margin: 0;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}

/* 场景摘要两栏 */
.scenario-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.scenario-list {
  display: grid;
  gap: 14px;
  align-content: start;
}

.scenario-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--copper);
  border-radius: var(--radius);
  padding: 16px;
}

.scenario-item:hover {
  border-color: var(--line-strong);
  border-left-color: var(--ink);
}

.scenario-name {
  font-size: 16px;
  margin: 0 0 8px;
}

.scenario-bg {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0 0 8px;
}

.scenario-link {
  font-size: 13.5px;
  color: var(--muted);
  margin: 0;
}

/* 服务承诺与交付标准摘要 */
.standard-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.standard-col {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 18px;
}

.standard-subtitle {
  font-size: 17px;
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.standard-list {
  display: grid;
  gap: 10px;
}

.standard-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  color: var(--ink-soft);
}

.standard-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  background: var(--copper);
  border-radius: 1px;
}

/* --------------------------------------------------------------------------
   pages · 服务矩阵内页
   -------------------------------------------------------------------------- */
.section-media {
  margin: 0 0 22px;
}

.section-matrix-overview .matrix-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.matrix-caption,
.scenario-table-caption {
  caption-side: top;
  text-align: left;
  font-size: 13px;
  color: var(--muted);
  padding: 12px 4px;
}

.section-matrix-overview .matrix-table th,
.section-matrix-overview .matrix-table td {
  text-align: left;
  padding: 13px 14px;
  font-size: 14.5px;
  border-top: 1px solid var(--line);
  vertical-align: top;
}

.section-matrix-overview .matrix-table thead th {
  background: rgba(31, 58, 52, 0.05);
  color: var(--muted);
  font-family: var(--sans);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.04em;
  border-top: 0;
}

.section-matrix-overview .matrix-table tbody th {
  font-family: var(--mono);
  font-weight: 400;
  color: var(--copper);
  font-size: 13px;
  white-space: nowrap;
}

.section-matrix-overview .matrix-table tbody tr:hover {
  background: rgba(169, 113, 66, 0.06);
}

.group-detail {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 20px;
  margin-bottom: 16px;
}

.group-detail:hover {
  border-color: var(--line-strong);
}

.group-title {
  font-size: 19px;
  margin: 0 0 16px;
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.group-num {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--copper);
  letter-spacing: 0.1em;
  flex: 0 0 auto;
}

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

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

.group-col-title {
  font-size: 15px;
  margin: 0 0 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
}

.group-list {
  display: grid;
  gap: 9px;
}

.group-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  color: var(--ink-soft);
}

.group-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 5px;
  height: 5px;
  background: var(--line-strong);
  border-radius: 50%;
}

/* 分组先后关系 */
.order-list {
  display: grid;
  gap: 12px;
  counter-reset: none;
}

.order-item {
  display: flex;
  gap: 14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
}

.order-num {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--copper);
  flex: 0 0 auto;
  padding-top: 3px;
}

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

.order-title {
  font-size: 16px;
  margin: 0 0 6px;
}

.order-body p {
  margin: 0;
  font-size: 14.5px;
  color: var(--ink-soft);
}

/* 交付物与核对要点 */
.deliverable-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.deliverable-col {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 18px;
  min-width: 0;
}

.deliverable-col-title {
  font-size: 16px;
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.deliverable-list {
  display: grid;
  gap: 10px;
}

.deliverable-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  color: var(--ink-soft);
}

.deliverable-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  background: var(--copper);
  border-radius: 1px;
}

/* 服务承诺 */
.commitment-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}

.commitment-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 16px;
  min-width: 0;
}

.commitment-item:hover {
  border-color: var(--copper);
}

.commitment-title {
  font-size: 16px;
  margin: 0 0 8px;
}

.commitment-item p {
  margin: 0;
  font-size: 14px;
  color: var(--ink-soft);
}

.section-matrix-commitment .section-media {
  margin-top: 20px;
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   pages · 合作流程内页
   -------------------------------------------------------------------------- */
.flow-overview,
.flow-detail,
.flow-output,
.flow-blocker,
.flow-checklist {
  padding: 40px 0;
  border-top: 1px solid var(--line);
}

.flow-overview {
  border-top: 0;
  padding-top: 0;
}

.stage-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
  margin-top: 18px;
}

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

.stage-item:hover {
  border-color: var(--copper);
}

.stage-item .stage-index {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--copper);
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

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

.stage-desc {
  margin: 0;
  font-size: 14px;
  color: var(--ink-soft);
}

.flow-figure {
  margin: 0 0 24px;
}

.stage-block {
  border-left: 2px solid var(--line-strong);
  padding: 0 0 24px 20px;
  margin-bottom: 24px;
  position: relative;
}

.stage-block:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
}

.stage-block::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 6px;
  width: 12px;
  height: 12px;
  background: var(--card);
  border: 2px solid var(--copper);
  border-radius: 50%;
}

.stage-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
}

.stage-head .stage-index {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--copper);
  letter-spacing: 0.1em;
  flex: 0 0 auto;
}

.stage-title {
  font-size: 19px;
  margin: 0;
}

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

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

.col-title {
  font-size: 15px;
  margin: 0 0 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.col-list {
  display: grid;
  gap: 9px;
}

.col-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  color: var(--ink-soft);
}

.col-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 5px;
  height: 5px;
  background: var(--line-strong);
  border-radius: 50%;
}

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

.output-col {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 18px;
  min-width: 0;
}

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

.blocker-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
}

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

.blocker-title {
  font-size: 16px;
  margin: 0 0 6px;
}

.blocker-text {
  margin: 0;
  font-size: 14.5px;
  color: var(--ink-soft);
}

.checklist-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 12px;
}

.checklist-item {
  display: flex;
  gap: 12px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  min-width: 0;
}

.checklist-index {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--copper);
  flex: 0 0 auto;
  padding-top: 2px;
}

.checklist-text {
  margin: 0;
  font-size: 14.5px;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages · 场景摘要内页
   -------------------------------------------------------------------------- */
.section-scenario-intro,
.section-scenario-list,
.section-scenario-map,
.section-scenario-beyond,
.section-scenario-next {
  padding: 40px 0;
  border-top: 1px solid var(--line);
}

.section-scenario-intro {
  border-top: 0;
  padding-top: 0;
}

.section-scenario-intro .section-figure {
  margin-top: 18px;
}

.section-scenario-list .scenario-item {
  margin-bottom: 14px;
  border-left: 3px solid var(--copper);
}

.section-scenario-list .scenario-item:nth-child(even) {
  border-left-color: var(--ink);
}

.section-scenario-list .scenario-name {
  font-size: 17px;
}

.scenario-group {
  font-size: 13.5px;
  color: var(--copper);
  margin: 0 0 8px;
}

.scenario-enter {
  margin: 0;
  font-size: 13.5px;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
}

.scenario-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.scenario-table th,
.scenario-table td {
  text-align: left;
  padding: 13px 14px;
  font-size: 14.5px;
  border-top: 1px solid var(--line);
  vertical-align: top;
}

.scenario-table thead th {
  background: rgba(31, 58, 52, 0.05);
  color: var(--muted);
  font-family: var(--sans);
  font-weight: 600;
  font-size: 13px;
  border-top: 0;
}

.scenario-table tbody th {
  font-weight: 600;
  color: var(--ink);
}

.scenario-table tbody tr:hover {
  background: rgba(169, 113, 66, 0.06);
}

.beyond-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 14px;
}

.beyond-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 16px;
  min-width: 0;
}

.beyond-name {
  font-size: 16px;
  margin: 0 0 8px;
}

.beyond-text {
  margin: 0;
  font-size: 14px;
  color: var(--ink-soft);
}

.section-scenario-next {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 22px;
  margin-top: 40px;
}

/* --------------------------------------------------------------------------
   pages · 常见问题内页
   -------------------------------------------------------------------------- */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 288px;
  gap: 32px;
  align-items: start;
}

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

.faq-group {
  padding: 0 0 34px;
  margin-bottom: 34px;
  border-bottom: 1px solid var(--line);
}

.faq-group:last-of-type {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.faq-group .section-head {
  margin-bottom: 16px;
}

.faq-figure {
  margin: 0 0 34px;
}

.boundary-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}

.boundary-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 16px;
  min-width: 0;
}

.boundary-title {
  font-size: 15.5px;
  margin: 0 0 8px;
}

.boundary-text {
  margin: 0;
  font-size: 14px;
  color: var(--ink-soft);
}

.next-paths {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.next-path {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 16px;
  min-width: 0;
}

.next-path-title {
  font-size: 16px;
  margin: 0 0 8px;
}

.next-path-text {
  margin: 0 0 10px;
  font-size: 14px;
  color: var(--ink-soft);
}

.text-link {
  font-size: 14px;
  font-weight: 600;
}

.faq-aside {
  min-width: 0;
  display: grid;
  gap: 16px;
  position: sticky;
  top: 88px;
}

.aside-block {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 16px;
}

.aside-title {
  font-size: 15.5px;
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.aside-list {
  display: grid;
  gap: 9px;
}

.aside-list a {
  font-size: 14px;
  color: var(--ink-soft);
  border-bottom: 0;
}

.aside-list a:hover {
  color: var(--copper);
}

.aside-text {
  font-size: 13.5px;
  color: var(--muted);
  margin: 0;
}

/* --------------------------------------------------------------------------
   pages · 404
   -------------------------------------------------------------------------- */
.error-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 56px 20px 72px;
}

.error-panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px 28px;
  max-width: 720px;
}

.error-code {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--copper);
  margin: 0 0 12px;
}

.error-panel h1 {
  font-size: 30px;
  margin: 0 0 14px;
}

.error-text {
  font-size: 15.5px;
  color: var(--ink-soft);
  margin: 0 0 22px;
  max-width: 560px;
}

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

.error-links {
  padding-top: 36px;
}

.error-link-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}

.error-link-list a {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  font-size: 14.5px;
  border-bottom: 1px solid var(--line);
}

.error-link-list a:hover {
  border-color: var(--copper);
}

/* --------------------------------------------------------------------------
   responsive · 平板与手机
   -------------------------------------------------------------------------- */
@media (max-width: 1080px) {
  .page-layout {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 26px;
  }
}

@media (max-width: 960px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
  }

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

  .hero-title {
    font-size: 32px;
  }

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

  .faq-aside {
    position: static;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  }

  .section-matrix .matrix-row {
    grid-template-columns: 56px minmax(120px, 1fr) minmax(130px, 1fr) minmax(180px, 1.4fr) 88px;
    gap: 10px;
  }
}

@media (max-width: 768px) {
  .top-bar {
    padding: 8px 16px;
  }

  .header-inner {
    padding: 0 16px;
    min-height: 60px;
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: flex;
  }

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

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

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

  .nav-item > a {
    display: block;
    padding: 12px 10px;
    font-size: 16px;
    min-height: 44px;
  }

  .nav-item.is-current > a {
    box-shadow: inset 3px 0 0 var(--copper);
  }

  .dropdown-toggle {
    position: absolute;
    right: 0;
    top: 4px;
    width: 44px;
    height: 40px;
    margin-left: 0;
  }

  .dropdown-list {
    position: static;
    min-width: 0;
    border: 0;
    box-shadow: none;
    background: rgba(31, 58, 52, 0.04);
    margin: 0 0 6px;
    padding: 4px 6px;
  }

  .home-main,
  .inner-main {
    padding-left: 16px;
    padding-right: 16px;
    padding-bottom: 48px;
  }

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

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

  .section {
    padding: 32px 0;
  }

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

  .hero {
    padding-top: 28px;
  }

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

  .hero-lead {
    font-size: 15.5px;
  }

  /* 首页服务矩阵：改为卡片式堆叠，避免横向溢出 */
  .section-matrix .matrix-table {
    border: 0;
    background: none;
    display: grid;
    gap: 12px;
  }

  .section-matrix .matrix-head {
    display: none;
  }

  .section-matrix .matrix-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--card);
    padding: 16px;
  }

  .section-matrix .matrix-row:first-child {
    border-top: 1px solid var(--line);
  }

  .section-matrix .cell-work {
    color: var(--ink-soft);
  }

  .cell-link a {
    white-space: normal;
  }

  .scenario-columns,
  .standard-columns,
  .group-columns,
  .deliverable-columns,
  .stage-columns,
  .output-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  /* 内页表格横向滚动 */
  .section-matrix-overview .matrix-table,
  .scenario-table {
    display: block;
    overflow-x: auto;
    white-space: normal;
  }

  .section-matrix-overview .matrix-table thead,
  .section-matrix-overview .matrix-table tbody,
  .scenario-table thead,
  .scenario-table tbody {
    display: table;
    width: 100%;
    min-width: 520px;
  }

  .stage-block {
    padding-left: 16px;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
    padding: 24px 16px 26px;
  }

  .footer-top,
  .footer-bottom {
    padding-left: 16px;
    padding-right: 16px;
  }

  .error-main {
    padding: 36px 16px 56px;
  }

  .error-panel {
    padding: 26px 20px;
  }
}

@media (max-width: 420px) {
  .hero-title {
    font-size: 25px;
  }

  .page-title {
    font-size: 23px;
  }

  .btn {
    width: 100%;
  }

  .hero-actions,
  .error-actions {
    flex-direction: column;
  }

  .scenario-enter {
    flex-direction: column;
    gap: 4px;
  }
}

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

  a,
  .btn,
  .faq-item {
    transition: none;
  }
}