/* ==========================================================================
   飘花网 · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base
   -------------------------------------------------------------------------- */

:root {
  --c-ink: #1f3a5f;
  --c-ink-soft: #3d5570;
  --c-accent: #3f8f7d;
  --c-accent-dark: #2f7264;
  --c-bg: #f6f8f9;
  --c-surface: #ffffff;
  --c-line: #dfe5e8;
  --c-warn: #c9702d;
  --c-muted: #5d6f7c;
  --radius: 8px;
  --radius-sm: 6px;
  --shell: 1180px;
  --sidebar-w: 232px;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-ink);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

p {
  margin: 0 0 12px;
}

p:last-child {
  margin-bottom: 0;
}

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

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

a:hover,
a:focus-visible {
  color: var(--c-ink);
  text-decoration: underline;
}

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

figure {
  margin: 0;
}

figcaption {
  margin-top: 8px;
  color: var(--c-muted);
  font-size: 13px;
  line-height: 1.6;
}

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

/* --------------------------------------------------------------------------
   layout — 顶部事实条 / 页头 / 侧栏骨架 / 主内容 / 页脚
   -------------------------------------------------------------------------- */

.fact-bar {
  background: var(--c-ink);
  color: #e8eef3;
  font-size: 13px;
  line-height: 1.6;
}

.fact-bar p {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 9px 24px;
}

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

.header-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 12px 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  color: var(--c-ink);
  font-size: 18px;
  font-weight: 700;
}

.brand:hover,
.brand:focus-visible {
  color: var(--c-ink);
  text-decoration: none;
}

.brand-mark {
  width: 26px;
  height: 26px;
  border-radius: var(--radius-sm);
  background: var(--c-accent);
  box-shadow: inset 0 0 0 6px #ffffff;
}

.brand-text {
  line-height: 1.2;
}

.nav-toggle {
  display: none;
  margin-left: auto;
  min-width: 44px;
  min-height: 44px;
  padding: 0 12px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  color: var(--c-ink);
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
}

.nav-toggle:hover {
  border-color: var(--c-accent);
  color: var(--c-accent-dark);
}

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

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

.nav-link {
  display: inline-block;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.4;
}

.nav-link:hover,
.nav-link:focus-visible {
  background: #eef3f5;
  color: var(--c-ink);
  text-decoration: none;
}

.nav-link.is-current {
  background: #e6f0ed;
  color: var(--c-accent-dark);
  font-weight: 700;
}

/* 布局骨架：正文在前、侧栏在后的默认列序 */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--sidebar-w);
  gap: 32px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 28px 24px 56px;
}

/* 侧栏位于左侧：侧栏列在前，正文列在后 */
.sidebar-left .page-layout,
.page-layout.sidebar-left {
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
}

.side-nav,
.sidebar,
.site-sidebar {
  align-self: start;
  position: sticky;
  top: 84px;
  padding: 18px 16px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.side-nav-title,
.sidebar-title {
  margin: 0 0 12px;
  color: var(--c-muted);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
}

.side-nav-list,
.sidebar-list {
  display: grid;
  gap: 4px;
}

.side-nav-link,
.sidebar-link {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.4;
}

.side-nav-link:hover,
.sidebar-link:hover,
.side-nav-link:focus-visible,
.sidebar-link:focus-visible {
  background: #eef3f5;
  color: var(--c-ink);
  text-decoration: none;
}

.side-nav-link.is-current,
.sidebar-link.is-current {
  background: #e6f0ed;
  color: var(--c-accent-dark);
  font-weight: 700;
}

.side-nav-icon {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-line);
}

.side-nav-link.is-current .side-nav-icon {
  background: var(--c-accent);
}

.side-nav-note,
.sidebar-note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--c-line);
  color: var(--c-muted);
  font-size: 13px;
  line-height: 1.7;
}

.site-main {
  min-width: 0;
  max-width: 100%;
}

.home-main,
.inner-main {
  display: block;
}

.site-main > section + section {
  margin-top: 44px;
}

/* 页面标题区（内页统一） */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  color: var(--c-muted);
  font-size: 13px;
}

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

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--c-ink);
}

.breadcrumb-sep {
  color: #b3c0c8;
}

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

.page-header {
  padding: 24px 26px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-left: 4px solid var(--c-accent);
  border-radius: var(--radius);
  margin-bottom: 32px;
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--c-ink);
}

.page-description {
  margin: 12px 0 0;
  max-width: 62ch;
  color: var(--c-ink-soft);
  font-size: 16px;
  line-height: 1.8;
}

/* 页脚 */

.site-footer {
  background: var(--c-surface);
  border-top: 1px solid var(--c-line);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 28px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 20px 24px;
}

.footer-brand {
  flex: 0 0 auto;
}

.footer-name {
  margin: 0;
  color: var(--c-ink);
  font-size: 15px;
  font-weight: 700;
}

.footer-slogan {
  margin: 2px 0 0;
  color: var(--c-muted);
  font-size: 13px;
}

.footer-nav {
  flex: 1 1 320px;
}

.footer-nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
}

.footer-nav-list a {
  color: var(--c-ink-soft);
  font-size: 14px;
}

.footer-nav-list a:hover,
.footer-nav-list a:focus-visible {
  color: var(--c-accent-dark);
}

.footer-meta {
  flex: 0 0 auto;
  margin: 0;
  color: var(--c-muted);
  font-size: 13px;
}

/* --------------------------------------------------------------------------
   components — 通用按钮 / 文本链 / 区块头 / 图片 / 折叠问答 / 对照列表
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  text-align: center;
}

.btn:hover,
.btn:focus-visible {
  text-decoration: none;
}

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

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--c-accent-dark);
  border-color: var(--c-accent-dark);
  color: #ffffff;
}

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

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

.text-link {
  display: inline-block;
  color: var(--c-accent-dark);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.text-link:hover,
.text-link:focus-visible {
  color: var(--c-ink);
}

.section-head {
  margin-bottom: 20px;
}

.section-title {
  font-size: 23px;
  font-weight: 700;
  color: var(--c-ink);
}

.section-lead,
.section-intro {
  margin: 10px 0 0;
  max-width: 68ch;
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.section-more {
  margin: 18px 0 0;
}

.section-note {
  margin: 18px 0 0;
  color: var(--c-ink-soft);
  font-size: 14px;
}

.section-note a {
  margin-right: 14px;
}

/* 图片容器统一约束 */

.hero-figure,
.section-media,
.media-figure,
.checklist-media {
  overflow: hidden;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

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

.section-media figcaption,
.media-figure figcaption,
.checklist-media figcaption {
  padding: 0 14px 12px;
}

.hero-figure figcaption {
  padding: 0 16px 14px;
}

/* 折叠问答 */

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

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

.faq-item[open] {
  border-color: #c6d9d3;
}

.faq-question {
  position: relative;
  padding: 14px 46px 14px 18px;
  color: var(--c-ink);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  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(--c-accent);
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
}

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

.faq-question:hover {
  color: var(--c-accent-dark);
}

.faq-answer {
  margin: 0;
  padding: 0 18px 16px;
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

/* 相关内页入口（卡片式） */

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.related-card {
  padding: 18px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.related-name {
  font-size: 17px;
}

.related-desc {
  margin: 8px 0 0;
  color: var(--c-ink-soft);
  font-size: 14px;
  line-height: 1.75;
}

/* 相关内页入口（文字链式） */

.related-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.related-item {
  padding: 14px 16px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.related-link {
  font-size: 15px;
  font-weight: 700;
}

/* 通用对照两栏 */

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

.compare-col {
  padding: 18px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.compare-col-left {
  border-top: 3px solid var(--c-line);
}

.compare-col-right {
  border-top: 3px solid var(--c-accent);
}

.compare-heading {
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-line);
  color: var(--c-ink);
  font-size: 16px;
}

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

.compare-item {
  position: relative;
  padding-left: 18px;
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.75;
}

.compare-item::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-accent);
}

.compare-col-left .compare-item::before {
  background: var(--c-line);
}

/* 通用步骤列表（内页执行步骤） */

.step-list {
  display: grid;
  gap: 12px;
  counter-reset: step;
}

.step-item {
  position: relative;
  padding: 0 0 0 34px;
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.75;
}

.step-item::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  top: 2px;
  left: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #e6f0ed;
  color: var(--c-accent-dark);
  font-size: 12px;
  font-weight: 700;
  line-height: 22px;
  text-align: center;
}

/* --------------------------------------------------------------------------
   pages — 首页
   -------------------------------------------------------------------------- */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 28px;
  padding: 28px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

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

.hero-eyebrow {
  margin: 0 0 10px;
  color: var(--c-accent-dark);
  font-size: 13px;
  font-weight: 700;
}

.hero-title {
  font-size: 34px;
  font-weight: 700;
  color: var(--c-ink);
}

.hero-lead {
  margin: 14px 0 0;
  max-width: 46ch;
  color: var(--c-ink-soft);
  font-size: 16px;
  line-height: 1.8;
}

.hero-points {
  display: grid;
  gap: 8px;
  margin: 18px 0 0;
}

.hero-points li {
  position: relative;
  padding-left: 20px;
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.7;
}

.hero-points li::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 2px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-accent);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.hero-visual {
  display: grid;
  gap: 18px;
  min-width: 0;
}

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

.hero-steps {
  display: grid;
  gap: 10px;
}

.hero-step {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 14px;
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
}

.hero-step .step-index {
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  border-radius: var(--radius-sm);
  background: var(--c-ink);
  color: #ffffff;
  font-size: 13px;
  font-weight: 700;
  line-height: 26px;
  text-align: center;
}

.hero-step .step-body {
  min-width: 0;
}

.hero-step .step-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--c-ink);
}

.hero-step .step-desc {
  margin: 2px 0 0;
  color: var(--c-muted);
  font-size: 13px;
  line-height: 1.65;
}

/* 服务方向索引（首页单列逐行） */

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

.direction-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 16px;
  padding: 16px 18px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.direction-no,
.direction-num {
  flex: 0 0 auto;
  color: var(--c-accent-dark);
  font-size: 14px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.direction-no {
  min-width: 34px;
}

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

.direction-name {
  font-size: 17px;
}

.direction-for,
.direction-audience {
  margin: 4px 0 0;
  color: var(--c-accent-dark);
  font-size: 14px;
}

.direction-scope {
  margin: 4px 0 0;
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.7;
}

.direction-link {
  flex: 0 0 auto;
  padding: 8px 14px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  color: var(--c-accent-dark);
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.direction-link:hover,
.direction-link:focus-visible {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: #ffffff;
  text-decoration: none;
}

.directions .section-media,
.direction-overview .section-media,
.acceptance-basis .section-media {
  margin-top: 20px;
}

.directions .section-media img,
.direction-overview .section-media img,
.acceptance-basis .section-media img {
  aspect-ratio: 21 / 9;
}

/* 合作流程四阶段预览（首页） */

.process-track {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.process-card {
  display: flex;
  flex-direction: column;
  padding: 18px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-top: 3px solid var(--c-accent);
  border-radius: var(--radius);
}

.process-no {
  color: var(--c-accent-dark);
  font-size: 13px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.process-name {
  margin-top: 6px;
  font-size: 17px;
}

.process-goal {
  margin: 8px 0 14px;
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.7;
}

.process-split {
  display: grid;
  gap: 12px;
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--c-line);
}

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

.process-col-title {
  color: var(--c-ink);
  font-size: 13px;
  font-weight: 700;
}

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

.process-list li {
  position: relative;
  padding-left: 14px;
  color: var(--c-ink-soft);
  font-size: 13px;
  line-height: 1.7;
}

.process-list li::before {
  content: "";
  position: absolute;
  top: 9px;
  left: 0;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--c-line);
}

/* 交付标准摘要（首页左右两栏） */

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

.standards-col {
  padding: 18px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

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

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

.standards-item {
  position: relative;
  padding-left: 34px;
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.75;
}

.standards-no {
  position: absolute;
  top: 2px;
  left: 0;
  width: 24px;
  height: 24px;
  border-radius: var(--radius-sm);
  background: #e6f0ed;
  color: var(--c-accent-dark);
  font-size: 12px;
  font-weight: 700;
  line-height: 24px;
  text-align: center;
}

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

.checks-item {
  position: relative;
  padding-left: 20px;
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.75;
}

.checks-item::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 0;
  width: 8px;
  height: 8px;
  border: 2px solid var(--c-warn);
  border-radius: 2px;
}

/* 站内栏目索引（首页五列网格） */

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

.index-cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 44px;
  padding: 16px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  color: var(--c-ink);
}

.index-cell:hover,
.index-cell:focus-visible {
  border-color: var(--c-accent);
  color: var(--c-ink);
  text-decoration: none;
}

.index-name {
  font-size: 16px;
  font-weight: 700;
}

.index-desc {
  color: var(--c-muted);
  font-size: 13px;
  line-height: 1.65;
}

/* --------------------------------------------------------------------------
   pages — 服务方向
   -------------------------------------------------------------------------- */

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

.method-section .method-block {
  padding: 20px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.method-section .method-block + .method-block {
  margin-top: 16px;
}

.method-section .method-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 8px 20px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--c-line);
}

.method-section .method-name {
  font-size: 18px;
}

.method-section .method-basis {
  margin: 0;
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.7;
}

.method-section .method-points {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 22px;
  margin-top: 14px;
}

.method-section .method-points li {
  position: relative;
  padding-left: 18px;
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.75;
}

.method-section .method-points li::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-accent);
}

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

.execution-section .execution-col {
  padding: 18px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.execution-section .col-title {
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-line);
  font-size: 16px;
}

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

.boundary-row {
  padding: 16px 18px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-warn);
  border-radius: var(--radius);
}

.boundary-name {
  font-size: 17px;
}

.boundary-note {
  margin: 6px 0 0;
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.75;
}

/* --------------------------------------------------------------------------
   pages — 合作流程
   -------------------------------------------------------------------------- */

.section-overview .stage-overview {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.section-overview .stage-overview-item {
  padding: 18px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.section-overview .stage-index {
  display: inline-block;
  margin-bottom: 8px;
  padding: 2px 10px;
  border-radius: var(--radius-sm);
  background: #e6f0ed;
  color: var(--c-accent-dark);
  font-size: 13px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.section-overview .stage-name {
  font-size: 17px;
}

.section-overview .stage-goal {
  margin: 8px 0 0;
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.7;
}

.section-overview .media-figure-wide {
  margin-top: 20px;
}

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

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

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

.section-stage .stage-col {
  padding: 18px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.section-stage .stage-col-us {
  border-left: 3px solid var(--c-accent);
}

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

.section-stage .col-list {
  display: grid;
  gap: 10px;
}

.section-stage .col-list li {
  position: relative;
  padding-left: 18px;
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.75;
}

.section-stage .col-list li::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-line);
}

.section-stage .stage-col-us .col-list li::before {
  background: var(--c-accent);
}

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

.section-handoff .handoff-item {
  padding: 18px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

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

.section-handoff .handoff-desc {
  margin: 8px 0 0;
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.75;
}

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

.section-pitfalls .pitfall-col {
  padding: 18px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.section-pitfalls .pitfall-col-fix {
  border-left: 3px solid var(--c-accent);
}

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

.section-pitfalls .col-list {
  display: grid;
  gap: 10px;
}

.section-pitfalls .col-list li {
  position: relative;
  padding-left: 18px;
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.75;
}

.section-pitfalls .pitfall-col-issue .col-list li::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 0;
  width: 8px;
  height: 8px;
  border: 2px solid var(--c-warn);
  border-radius: 2px;
}

.section-pitfalls .pitfall-col-fix .col-list li::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-accent);
}

.section-pitfalls .media-figure {
  margin-top: 20px;
}

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

.section-related .related-card {
  padding: 18px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

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

.section-related .related-desc {
  margin: 8px 0 0;
  color: var(--c-ink-soft);
  font-size: 14px;
  line-height: 1.75;
}

/* --------------------------------------------------------------------------
   pages — 交付标准
   -------------------------------------------------------------------------- */

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

.delivery-composition .composition-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  padding: 16px 18px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.delivery-composition .composition-no {
  grid-row: span 3;
  color: var(--c-accent-dark);
  font-size: 14px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.delivery-composition .composition-name {
  font-size: 17px;
}

.delivery-composition .composition-desc {
  margin: 4px 0 0;
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.75;
}

.delivery-composition .composition-handover {
  margin: 4px 0 0;
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.7;
}

.acceptance-basis .compare-block,
.quality-check .compare-block {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.acceptance-basis .compare-col,
.quality-check .compare-col {
  padding: 18px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.acceptance-basis .compare-col-left,
.quality-check .compare-col-left {
  border-top: 3px solid var(--c-line);
}

.acceptance-basis .compare-col-right,
.quality-check .compare-col-right {
  border-top: 3px solid var(--c-accent);
}

.acceptance-basis .compare-heading,
.quality-check .compare-heading {
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-line);
  color: var(--c-ink);
  font-size: 16px;
}

.acceptance-basis .compare-list,
.quality-check .compare-list {
  display: grid;
  gap: 10px;
}

.acceptance-basis .compare-item,
.quality-check .compare-item {
  position: relative;
  padding-left: 18px;
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.75;
}

.acceptance-basis .compare-item::before,
.quality-check .compare-item::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-accent);
}

.acceptance-basis .compare-col-left .compare-item::before,
.quality-check .compare-col-left .compare-item::before {
  background: var(--c-line);
}

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

.post-delivery .confirm-item {
  padding: 18px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.post-delivery .confirm-name {
  font-size: 17px;
}

.post-delivery .confirm-desc {
  margin: 8px 0 0;
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.75;
}

.post-delivery .confirm-record {
  margin: 10px 0 0;
  padding-top: 10px;
  border-top: 1px solid var(--c-line);
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.7;
}

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

.related-links .related-card {
  padding: 18px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.related-links .related-name {
  font-size: 17px;
}

.related-links .related-desc {
  margin: 8px 0 0;
  color: var(--c-ink-soft);
  font-size: 14px;
  line-height: 1.75;
}

/* --------------------------------------------------------------------------
   pages — 合作准备与常见问题
   -------------------------------------------------------------------------- */

.section-checklist .checklist-body {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 22px;
  align-items: start;
}

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

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

.section-checklist .checklist-item {
  padding: 16px 18px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

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

.section-checklist .checklist-info {
  margin: 6px 0 0;
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.75;
}

.section-checklist .checklist-judge {
  margin: 6px 0 0;
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.7;
}

.section-order .order-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  counter-reset: order;
}

.section-order .order-step {
  padding: 18px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.section-order .order-step-name {
  position: relative;
  padding-left: 32px;
  font-size: 16px;
}

.section-order .order-step-name::before {
  counter-increment: order;
  content: counter(order);
  position: absolute;
  top: 0;
  left: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #e6f0ed;
  color: var(--c-accent-dark);
  font-size: 12px;
  font-weight: 700;
  line-height: 24px;
  text-align: center;
}

.section-order .order-step-point {
  margin: 10px 0 0;
  color: var(--c-ink-soft);
  font-size: 14px;
  line-height: 1.75;
}

.section-faq .faq-group + .faq-group {
  margin-top: 24px;
}

.section-faq .faq-group-title {
  margin-bottom: 12px;
  padding-left: 12px;
  border-left: 3px solid var(--c-accent);
  font-size: 17px;
}

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

.section-next .next-card {
  padding: 18px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.section-next .next-card-title {
  font-size: 17px;
}

.section-next .next-card-text {
  margin: 8px 0 0;
  color: var(--c-ink-soft);
  font-size: 14px;
  line-height: 1.75;
}

/* --------------------------------------------------------------------------
   pages — 404
   -------------------------------------------------------------------------- */

.error-main {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 24px 64px;
}

.error-panel {
  padding: 32px 28px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-left: 4px solid var(--c-warn);
  border-radius: var(--radius);
}

.error-code {
  margin: 0 0 8px;
  color: var(--c-warn);
  font-size: 14px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.error-title {
  font-size: 32px;
  font-weight: 700;
}

.error-text {
  margin: 12px 0 0;
  max-width: 56ch;
  color: var(--c-ink-soft);
  font-size: 16px;
  line-height: 1.8;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

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

.error-link-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.error-link-list a {
  display: block;
  min-height: 44px;
  padding: 12px 16px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  color: var(--c-ink);
  font-size: 15px;
}

.error-link-list a:hover,
.error-link-list a:focus-visible {
  border-color: var(--c-accent);
  color: var(--c-accent-dark);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1080px) {
  .index-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .section-handoff .handoff-list,
  .post-delivery .confirm-list,
  .section-next .next-grid,
  .section-related .related-grid,
  .related-links .related-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 960px) {
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .site-nav {
    flex: 1 1 100%;
    order: 3;
    margin-left: 0;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    margin-top: 8px;
    padding-top: 10px;
    border-top: 1px solid var(--c-line);
  }

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

  .nav-link {
    display: block;
    min-height: 44px;
    padding: 12px 10px;
  }

  .page-layout,
  .sidebar-left .page-layout,
  .page-layout.sidebar-left {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
    padding: 22px 20px 48px;
  }

  .side-nav,
  .sidebar,
  .site-sidebar {
    position: static;
    top: auto;
  }

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

  .hero {
    grid-template-columns: minmax(0, 1fr);
    padding: 22px;
  }

  .hero-title {
    font-size: 30px;
  }

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

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

@media (max-width: 640px) {
  .fact-bar p {
    padding: 8px 16px;
  }

  .header-inner {
    padding: 10px 16px;
  }

  .page-layout,
  .sidebar-left .page-layout,
  .page-layout.sidebar-left {
    padding: 18px 16px 40px;
  }

  .page-header {
    padding: 20px 18px;
    margin-bottom: 26px;
  }

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

  .hero {
    padding: 18px;
  }

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

  .hero-actions .btn {
    flex: 1 1 100%;
  }

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

  .site-main > section + section {
    margin-top: 34px;
  }

  .direction-row,
  .direction-overview .direction-row {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 10px 14px;
    padding: 14px;
  }

  .direction-link {
    grid-column: 2;
    justify-self: start;
    white-space: normal;
  }

  .process-track,
  .standards-grid,
  .section-overview .stage-overview,
  .section-stage .stage-split,
  .section-handoff .handoff-list,
  .section-pitfalls .pitfall-split,
  .execution-section .execution-grid,
  .acceptance-basis .compare-block,
  .quality-check .compare-block,
  .post-delivery .confirm-list,
  .section-order .order-steps,
  .section-next .next-grid,
  .section-related .related-grid,
  .related-links .related-grid,
  .related-grid,
  .related-list,
  .error-link-list,
  .index-grid {
    grid-template-columns: minmax(0, 1fr);
  }

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

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

  .delivery-composition .composition-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .delivery-composition .composition-no {
    grid-row: auto;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 18px 16px;
  }

  .footer-nav {
    flex: 1 1 auto;
  }

  .error-main {
    padding: 32px 16px 48px;
  }

  .error-panel {
    padding: 24px 18px;
  }
}

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