/* ==========================================================================
   每日吃瓜 · 68586166.com
   企业信息观察与内容整理服务官网 · 全站样式表
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. base 基础层
   -------------------------------------------------------------------------- */

:root {
  --c-ink: #1f3a5f;
  --c-accent: #b33a2b;
  --c-accent-dark: #8f2c20;
  --c-bg: #f7f5f1;
  --c-band: #e9e4dc;
  --c-text: #232323;
  --c-muted: #6b7280;
  --c-line: #d8d2c8;
  --c-surface: #ffffff;

  --font-stack: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC",
    "Noto Sans CJK SC", "WenQuanYi Micro Hei", system-ui, -apple-system, "Segoe UI", Arial, sans-serif;

  --w-container: 1120px;
  --w-narrow: 860px;
  --radius: 6px;
  --radius-sm: 4px;

  --shadow-card: 0 1px 2px rgba(31, 58, 95, 0.06);
  --shadow-hover: 0 3px 10px rgba(31, 58, 95, 0.10);
}

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

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

body {
  margin: 0;
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-text);
  background-color: var(--c-bg);
  overflow-wrap: break-word;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--c-ink);
  font-weight: 600;
  line-height: 1.4;
}

p {
  margin: 0;
}

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

dl,
dd {
  margin: 0;
}

figure {
  margin: 0;
}

img {
  max-width: 100%;
  height: auto;
  border: 0;
}

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

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

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

button {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

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

/* --------------------------------------------------------------------------
   2. layout 骨架层：容器 / 页头 / 导航 / 主体 / 页脚
   -------------------------------------------------------------------------- */

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

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 68px;
}

.brand {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 2px;
  flex: 0 0 auto;
  color: var(--c-ink);
  text-decoration: none;
}

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

.brand-name {
  font-size: 21px;
  font-weight: 600;
  line-height: 1.2;
  color: var(--c-ink);
}

.brand-tag {
  font-size: 12px;
  line-height: 1.3;
  color: var(--c-muted);
}

/* 主导航 */
.site-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: flex-end;
}

.nav-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px 22px;
}

.nav-list > li {
  display: flex;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 2px;
  font-size: 15px;
  color: var(--c-ink);
  border-bottom: 2px solid transparent;
  text-decoration: none;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--c-accent);
  border-bottom-color: var(--c-accent);
  text-decoration: none;
}

.nav-link.is-current {
  color: var(--c-accent);
  border-bottom-color: var(--c-accent);
  font-weight: 600;
}

/* 汉堡按钮（桌面隐藏） */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

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

/* 主体 */
.site-main {
  display: block;
  padding-bottom: 56px;
}

.home-main {
  padding-bottom: 40px;
}

.inner-main {
  padding-bottom: 64px;
}

.section {
  padding: 52px 0;
}

.section-alt {
  background-color: var(--c-band);
}

/* 页脚 */
.site-footer {
  background-color: var(--c-ink);
  color: #d9dee6;
  padding-top: 46px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 28px 32px;
  padding-bottom: 34px;
}

.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
}

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

.footer-links a {
  display: inline-block;
  min-height: 24px;
  font-size: 14px;
  color: #c3ccd8;
  text-decoration: none;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: #ffffff;
  text-decoration: underline;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding: 18px 24px 26px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.footer-brand {
  font-size: 14px;
  color: #e6ebf2;
}

.footer-copy,
.footer-copyright {
  font-size: 13px;
  color: #9aa6b6;
}

/* --------------------------------------------------------------------------
   3. components 通用组件
   -------------------------------------------------------------------------- */

/* 区块标题组 */
.section-head {
  margin-bottom: 26px;
  max-width: 780px;
}

.section-head h2,
.section-title {
  font-size: 22px;
  color: var(--c-ink);
}

.section-desc,
.section-lead {
  margin-top: 10px;
  font-size: 15px;
  color: var(--c-muted);
}

.section-more {
  margin-top: 24px;
  font-size: 15px;
}

.section-more a {
  display: inline-block;
  min-height: 24px;
  font-weight: 600;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid transparent;
  text-decoration: none;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

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

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

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

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

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background-color: var(--c-ink);
  color: #ffffff;
}

/* 图片容器统一定义 */
.hero-figure,
.section-figure,
.page-hero-media,
.media-figure,
.scene-figure {
  display: block;
  overflow: hidden;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background-color: var(--c-band);
}

.hero-figure img,
.section-figure img,
.page-hero-media img,
.media-figure img,
.scene-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.hero-figure figcaption,
.section-figure figcaption,
.page-hero-media figcaption,
.media-figure figcaption,
.scene-caption {
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-muted);
  background-color: var(--c-surface);
  border-top: 1px solid var(--c-line);
}

/* 卡片通用外观（父级限定，避免跨页污染） */
.matrix-card,
.entry-card,
.object-card,
.accept-item,
.combo-item,
.advice-item,
.unsuitable-item,
.prepare-card,
.note-item,
.checklist-item,
.feedback-item,
.nextstep-item {
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

/* 可展开问答 */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 52px;
  padding: 14px 18px;
  font-size: 16px;
  font-weight: 600;
  color: var(--c-ink);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  flex: 0 0 auto;
  font-size: 20px;
  line-height: 1;
  color: var(--c-accent);
}

.faq-item[open] .faq-question {
  color: var(--c-accent);
  border-bottom: 1px solid var(--c-line);
}

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

.faq-answer {
  padding: 14px 18px 18px;
  font-size: 15px;
  color: var(--c-text);
}

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

/* 相关链接条（首页底部） */
.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  max-width: var(--w-container);
  margin: 0 auto;
  padding: 18px 24px 0;
}

.related-links-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-ink);
}

.related-links-item {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 14px;
}

/* --------------------------------------------------------------------------
   4. pages 页面模块
   -------------------------------------------------------------------------- */

/* ---------- 4.1 首页 index.html ---------- */

/* 首屏：窄侧索引 + 宽侧主内容 */
.hero {
  padding: 44px 0 8px;
  background-color: var(--c-surface);
  border-bottom: 1px solid var(--c-line);
}

.hero-grid {
  display: grid;
  grid-template-columns: 236px minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

.hero-index {
  padding: 20px;
  background-color: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.hero-index-title {
  font-size: 15px;
  color: var(--c-ink);
  padding-bottom: 10px;
  margin-bottom: 6px;
  border-bottom: 1px solid var(--c-line);
}

.hero-index-list {
  display: flex;
  flex-direction: column;
}

.hero-index-list li + li {
  border-top: 1px dashed var(--c-line);
}

.hero-index-list a {
  display: block;
  min-height: 44px;
  padding: 11px 0;
  font-size: 14px;
  color: var(--c-ink);
  text-decoration: none;
}

.hero-index-list a:hover,
.hero-index-list a:focus-visible {
  color: var(--c-accent);
  text-decoration: none;
}

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

.hero-eyebrow {
  font-size: 13px;
  letter-spacing: 0;
  color: var(--c-accent);
  font-weight: 600;
  margin-bottom: 10px;
}

.hero-main h1 {
  font-size: 32px;
  line-height: 1.35;
}

.hero-lead {
  margin-top: 14px;
  font-size: 16px;
  color: var(--c-text);
  max-width: 680px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
  margin: 22px 0 26px;
}

.hero-figure img {
  aspect-ratio: 16 / 9;
}

/* 服务矩阵速览 */
.matrix-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.matrix-card {
  padding: 22px 20px;
  border-top: 3px solid var(--c-accent);
}

.matrix-problem {
  font-size: 13px;
  color: var(--c-muted);
  margin-bottom: 10px;
}

.matrix-name {
  font-size: 18px;
  margin-bottom: 10px;
}

.matrix-way {
  font-size: 15px;
  color: var(--c-text);
}

/* 适用问题与交付关系 */
.fit-delivery-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
}

.fit-col,
.delivery-col {
  min-width: 0;
  padding: 22px 22px 24px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.col-title {
  font-size: 18px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-line);
}

.fit-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.fit-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  color: var(--c-text);
}

.fit-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 7px;
  height: 7px;
  background-color: var(--c-accent);
  border-radius: 1px;
}

.delivery-list dt {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-ink);
  margin-top: 12px;
}

.delivery-list dt:first-child {
  margin-top: 0;
}

.delivery-list dd {
  margin-top: 4px;
  font-size: 15px;
  color: var(--c-text);
}

.section-figure {
  margin-top: 28px;
}

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

/* 合作流程纵线 */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.timeline-item {
  position: relative;
  padding: 0 0 24px 30px;
  border-left: 2px solid var(--c-line);
}

.timeline-item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 4px;
  width: 12px;
  height: 12px;
  background-color: var(--c-accent);
  border: 2px solid var(--c-bg);
  border-radius: 50%;
}

.timeline-name {
  font-size: 18px;
  margin-bottom: 8px;
}

.timeline-duty {
  font-size: 15px;
  color: var(--c-text);
  max-width: 760px;
}

.timeline-output {
  margin-top: 6px;
  font-size: 14px;
  color: var(--c-muted);
}

/* 合作前准备清单 */
.prepare-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.prepare-list {
  counter-reset: prepare;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.prepare-list li {
  position: relative;
  counter-increment: prepare;
  padding: 14px 18px 14px 54px;
  font-size: 15px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.prepare-list li::before {
  content: counter(prepare);
  position: absolute;
  left: 16px;
  top: 14px;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  color: #ffffff;
  background-color: var(--c-ink);
  border-radius: 50%;
}

.prepare-entry {
  padding: 22px 20px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.prepare-entry .entry-title {
  font-size: 18px;
  margin-bottom: 10px;
}

.prepare-entry .entry-desc {
  font-size: 15px;
  color: var(--c-text);
}

.prepare-entry .entry-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 16px;
}

.prepare-entry .entry-links a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  font-size: 15px;
  font-weight: 600;
}

/* ---------- 4.2 内页统一外壳 ---------- */

.inner-main .container {
  min-width: 0;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  max-width: var(--w-container);
  margin: 0 auto;
  padding: 18px 24px 0;
  font-size: 14px;
  color: var(--c-muted);
}

.breadcrumb a {
  color: var(--c-ink);
  text-decoration: none;
}

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

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

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

.page-header {
  max-width: var(--w-container);
  margin: 0 auto;
  padding: 16px 24px 0;
}

.page-title {
  font-size: 32px;
  font-weight: 600;
  color: var(--c-ink);
  line-height: 1.35;
}

/* 内页导语区（两种结构共用视觉） */
.page-hero {
  padding: 18px 0 0;
}

.page-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

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

.page-hero-lead,
.page-lead {
  font-size: 16px;
  color: var(--c-text);
  max-width: 640px;
}

.page-hero-lead a {
  font-weight: 600;
}

.page-hero-meta,
.page-meta {
  margin-top: 12px;
  font-size: 14px;
  color: var(--c-muted);
}

.page-hero-meta a {
  font-weight: 600;
}

.page-hero-eyebrow {
  font-size: 13px;
  font-weight: 600;
  color: var(--c-accent);
  margin-bottom: 8px;
}

.page-hero-desc {
  font-size: 16px;
  color: var(--c-text);
  max-width: 640px;
}

.page-hero-updated,
.page-updated {
  margin-top: 12px;
  font-size: 14px;
  color: var(--c-muted);
}

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

/* ---------- 4.3 服务索引 service-map.html ---------- */

.page-service-map .section {
  padding: 44px 0;
}

/* 服务矩阵总览表 */
.table-wrap {
  overflow-x: auto;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.matrix-table {
  min-width: 720px;
  font-size: 15px;
}

.table-caption {
  padding: 14px 18px;
  text-align: left;
  font-size: 14px;
  color: var(--c-muted);
  border-bottom: 1px solid var(--c-line);
}

.matrix-table th,
.matrix-table td {
  padding: 14px 18px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--c-line);
}

.matrix-table thead th {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-ink);
  background-color: var(--c-band);
  white-space: nowrap;
}

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

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

/* 服务条目对照 */
.entry-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.entry-card {
  display: flex;
  flex-direction: column;
  padding: 22px 20px;
}

.entry-card .entry-title {
  font-size: 18px;
  margin-bottom: 10px;
}

.entry-problem {
  font-size: 14px;
  color: var(--c-muted);
  margin-bottom: 14px;
}

.entry-detail dt {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-ink);
  margin-top: 10px;
}

.entry-detail dt:first-child {
  margin-top: 0;
}

.entry-detail dd {
  margin-top: 3px;
  font-size: 15px;
  color: var(--c-text);
}

.entry-link {
  margin-top: auto;
  padding-top: 16px;
  font-size: 15px;
  font-weight: 600;
}

.entry-link a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
}

/* 实现方式与协作接口 */
.method-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
}

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

.method-col h3 {
  font-size: 18px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-line);
}

.method-list {
  counter-reset: method;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.method-list li {
  position: relative;
  counter-increment: method;
  padding-left: 30px;
  font-size: 15px;
  color: var(--c-text);
}

.method-list li::before {
  content: counter(method);
  position: absolute;
  left: 0;
  top: 2px;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  color: var(--c-accent);
  border: 1px solid var(--c-accent);
  border-radius: 50%;
}

/* 服务组合建议 */
.combo-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.combo-item {
  padding: 20px 22px;
  border-left: 3px solid var(--c-ink);
}

.combo-name {
  font-size: 18px;
  margin-bottom: 8px;
}

.combo-fit {
  font-size: 15px;
  color: var(--c-text);
}

.combo-why {
  margin-top: 6px;
  font-size: 14px;
  color: var(--c-muted);
}

.combo-more {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin-top: 22px;
  font-size: 15px;
  font-weight: 600;
}

/* ---------- 4.4 适用场景 fit-scene.html ---------- */

.page-fit-scene .section {
  padding: 44px 0;
}

.object-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.object-card {
  display: flex;
  flex-direction: column;
  padding: 20px 18px;
  border-top: 3px solid var(--c-ink);
}

.object-name {
  font-size: 17px;
  margin-bottom: 10px;
}

.object-task {
  font-size: 15px;
  color: var(--c-text);
}

.object-link {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  margin-top: auto;
  padding-top: 14px;
  font-size: 15px;
  font-weight: 600;
}

/* 比较维度与差异结论 */
.compare-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

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

.compare-subtitle {
  font-size: 18px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-line);
}

.dim-list,
.note-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.dim-item,
.note-item {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  color: var(--c-text);
}

.dim-item::before,
.note-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 7px;
  height: 7px;
  background-color: var(--c-accent);
  border-radius: 1px;
}

.compare-col-notes .note-item::before {
  background-color: var(--c-ink);
}

/* 选择建议 */
.advice-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.advice-item {
  padding: 20px;
}

.advice-title {
  font-size: 17px;
  margin-bottom: 10px;
}

.advice-start {
  font-size: 15px;
  color: var(--c-text);
}

.advice-extend {
  margin-top: 8px;
  font-size: 14px;
  color: var(--c-muted);
}

/* 不适合的情形 */
.unsuitable-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.unsuitable-item {
  padding: 20px;
  border-left: 3px solid var(--c-accent);
}

.unsuitable-title {
  font-size: 17px;
  margin-bottom: 10px;
}

.unsuitable-desc {
  font-size: 15px;
  color: var(--c-text);
}

.unsuitable-more {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin-top: 22px;
  font-size: 15px;
  font-weight: 600;
}

/* 场景配图 */
.scene-figure img {
  aspect-ratio: 21 / 9;
}

/* 相关页面 */
.related-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.related-item a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 8px 16px;
  font-size: 15px;
  color: var(--c-ink);
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  text-decoration: none;
}

.related-item a:hover,
.related-item a:focus-visible {
  color: var(--c-accent);
  border-color: var(--c-accent);
  text-decoration: none;
}

/* ---------- 4.5 交付标准 delivery-standard.html ---------- */

.page-delivery-standard .section {
  padding: 44px 0;
}

/* 交付物定义列表 */
.definition-list {
  display: flex;
  flex-direction: column;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.definition-row {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 20px;
  padding: 18px 22px;
}

.definition-row + .definition-row {
  border-top: 1px solid var(--c-line);
}

.definition-term {
  font-size: 16px;
  font-weight: 600;
  color: var(--c-ink);
}

.definition-desc {
  font-size: 15px;
  color: var(--c-text);
  min-width: 0;
}

/* 字段与来源标注 */
.field-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

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

.field-col-title {
  font-size: 18px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-line);
}

.field-name-list,
.field-source-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.field-name-item {
  padding: 10px 14px;
  font-size: 15px;
  font-weight: 600;
  color: var(--c-ink);
  background-color: var(--c-band);
  border-radius: var(--radius-sm);
}

.field-source-item {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  color: var(--c-text);
}

.field-source-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 7px;
  height: 7px;
  background-color: var(--c-accent);
  border-radius: 1px;
}

/* 验收口径 */
.accept-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.accept-item {
  padding: 20px;
  border-top: 3px solid var(--c-ink);
}

.accept-name {
  font-size: 17px;
  margin-bottom: 10px;
}

.accept-standard {
  font-size: 15px;
  color: var(--c-text);
}

.accept-action {
  margin-top: 8px;
  font-size: 14px;
  color: var(--c-muted);
}

/* 协作节奏与确认方式 */
.rhythm-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

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

.rhythm-col-title {
  font-size: 18px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-line);
}

.rhythm-pace-list,
.rhythm-confirm-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.rhythm-pace-item,
.rhythm-confirm-item {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  color: var(--c-text);
}

.rhythm-pace-item::before,
.rhythm-confirm-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 7px;
  height: 7px;
  background-color: var(--c-accent);
  border-radius: 1px;
}

.rhythm-col-confirm .rhythm-confirm-item::before {
  background-color: var(--c-ink);
}

/* 交付标准页相关入口（链接 + 说明） */
.section-related .related-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

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

.related-link {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 16px;
  font-weight: 600;
}

.related-desc {
  margin-top: 8px;
  font-size: 14px;
  color: var(--c-muted);
}

/* ---------- 4.6 合作流程 process.html ---------- */

.page-process .section {
  padding: 44px 0;
}

.process-timeline .timeline-list {
  display: flex;
  flex-direction: column;
}

.process-timeline .timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 20px;
  padding-bottom: 28px;
}

.process-timeline .timeline-item:last-child {
  padding-bottom: 0;
}

.process-timeline .timeline-marker {
  position: relative;
  width: 18px;
  height: 18px;
  margin: 6px auto 0;
  background-color: var(--c-accent);
  border: 3px solid var(--c-surface);
  border-radius: 50%;
  box-shadow: 0 0 0 2px var(--c-line);
}

.process-timeline .timeline-item:not(:last-child) .timeline-marker::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 20px;
  width: 2px;
  height: calc(100% + 16px);
  transform: translateX(-50%);
  background-color: var(--c-line);
}

.process-timeline .timeline-body {
  min-width: 0;
  padding: 20px 22px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.process-timeline .timeline-title {
  font-size: 18px;
  margin-bottom: 8px;
}

.process-timeline .timeline-desc {
  font-size: 15px;
  color: var(--c-text);
}

.process-timeline .timeline-meta {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 8px 16px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed var(--c-line);
}

.process-timeline .timeline-meta dt {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-ink);
}

.process-timeline .timeline-meta dd {
  font-size: 14px;
  color: var(--c-text);
  min-width: 0;
}

/* 每阶段准备事项 */
.process-prepare .prepare-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.process-prepare .prepare-card {
  padding: 20px 22px;
}

.process-prepare .prepare-title {
  font-size: 17px;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-line);
}

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

.process-prepare .prepare-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  color: var(--c-text);
}

.process-prepare .prepare-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 7px;
  height: 7px;
  background-color: var(--c-accent);
  border-radius: 1px;
}

/* 复盘与后续扩展 */
.process-notes .notes-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.process-notes .note-item {
  padding: 20px;
  border-left: 3px solid var(--c-ink);
}

.process-notes .note-title {
  font-size: 17px;
  margin-bottom: 8px;
}

.process-notes .note-item p {
  font-size: 15px;
  color: var(--c-text);
}

.process-related {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin-top: 24px;
  font-size: 15px;
  font-weight: 600;
}

/* ---------- 4.7 常见问题 faq.html ---------- */

.page-faq .faq-group {
  padding: 40px 0;
}

.page-faq .faq-group-alt {
  background-color: var(--c-band);
}

.page-faq .section-head h2 {
  font-size: 22px;
}

.page-faq .section-head p {
  margin-top: 10px;
  font-size: 15px;
  color: var(--c-muted);
}

.faq-media {
  padding: 24px 0 0;
}

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

.related-entry {
  padding: 40px 0 8px;
}

.related-title {
  font-size: 22px;
  margin-bottom: 18px;
}

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

.related-entry .related-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  padding: 16px 18px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.related-entry .related-list a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 15px;
  font-weight: 600;
}

.related-entry .related-list span {
  font-size: 14px;
  color: var(--c-muted);
}

/* ---------- 4.8 联系支持 support.html ---------- */

.page-support .section {
  padding: 44px 0;
}

.page-head {
  padding: 16px 24px 0;
}

.page-head .page-lead {
  max-width: 760px;
}

/* 侧栏 + 主内容：aside 在前 */
.layout-shell.sidebar-left {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

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

.prepare-aside .media-figure img {
  aspect-ratio: 4 / 3;
}

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

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

.checklist-item {
  position: relative;
  counter-increment: checklist;
  padding: 16px 20px 16px 58px;
}

.checklist-item::before {
  content: counter(checklist);
  position: absolute;
  left: 18px;
  top: 16px;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  color: #ffffff;
  background-color: var(--c-accent);
  border-radius: 50%;
}

.checklist-title {
  font-size: 17px;
  margin-bottom: 8px;
}

.checklist-item p {
  font-size: 15px;
  color: var(--c-text);
}

.prepare-note {
  margin-top: 18px;
  font-size: 15px;
  color: var(--c-text);
}

.prepare-note a {
  font-weight: 600;
}

/* 支持入口导航 */
.support-entry-section .entry-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.support-entry-section .entry-card {
  display: flex;
  flex-direction: column;
  padding: 20px;
  border-top: 3px solid var(--c-ink);
}

.support-entry-section .entry-title {
  font-size: 17px;
  margin-bottom: 10px;
}

.support-entry-section .entry-desc {
  font-size: 15px;
  color: var(--c-text);
}

.support-entry-section .entry-link {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  margin-top: auto;
  padding-top: 14px;
  font-size: 15px;
  font-weight: 600;
}

/* 反馈与纠错 */
.feedback-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.feedback-item {
  padding: 20px;
  border-left: 3px solid var(--c-accent);
}

.feedback-title {
  font-size: 17px;
  margin-bottom: 8px;
}

.feedback-item p {
  font-size: 15px;
  color: var(--c-text);
}

/* 下一步建议 */
.nextstep-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.nextstep-item {
  padding: 20px;
  border-top: 3px solid var(--c-ink);
}

.nextstep-title {
  font-size: 17px;
  margin-bottom: 8px;
}

.nextstep-item p {
  font-size: 15px;
  color: var(--c-text);
}

/* ---------- 4.9 404 页 ---------- */

.error-main {
  padding: 64px 0 72px;
}

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

.error-code {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-accent);
  margin-bottom: 10px;
}

.error-title {
  font-size: 32px;
  line-height: 1.35;
}

.error-text {
  margin-top: 14px;
  font-size: 16px;
  color: var(--c-text);
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
  margin: 24px 0 32px;
}

.error-links {
  padding: 22px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.error-links-title {
  font-size: 18px;
  margin-bottom: 14px;
}

.error-link-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 20px;
}

.error-link-list a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  font-size: 15px;
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   5. responsive 响应式
   -------------------------------------------------------------------------- */

@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 28px;
  }

  .matrix-grid,
  .entry-grid,
  .advice-list,
  .support-entry-section .entry-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .layout-shell.sidebar-left {
    grid-template-columns: 280px minmax(0, 1fr);
  }

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

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }

  /* 页头与移动导航 */
  .header-inner {
    flex-wrap: wrap;
    gap: 10px;
    padding: 10px 16px;
    min-height: 60px;
  }

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

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    flex: 1 1 100%;
    justify-content: stretch;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    padding: 6px 0 10px;
    border-top: 1px solid var(--c-line);
  }

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

  .nav-list > li {
    width: 100%;
    border-bottom: 1px dashed var(--c-line);
  }

  .nav-list > li:last-child {
    border-bottom: 0;
  }

  .nav-link {
    width: 100%;
    min-height: 46px;
    border-bottom: 0;
  }

  .nav-link.is-current {
    border-bottom: 0;
  }

  /* 首屏 */
  .hero {
    padding: 26px 0 4px;
  }

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

  .hero-main h1 {
    font-size: 24px;
  }

  .hero-actions {
    margin: 18px 0 22px;
  }

  .btn {
    flex: 1 1 auto;
    min-width: 140px;
  }

  /* 内页外壳 */
  .breadcrumb {
    padding: 14px 16px 0;
  }

  .page-header {
    padding: 12px 16px 0;
  }

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

  .page-hero {
    padding: 14px 0 0;
  }

  .page-hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .page-hero-media img {
    aspect-ratio: 16 / 9;
  }

  .section {
    padding: 36px 0;
  }

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

  .section-head h2,
  .section-title {
    font-size: 20px;
  }

  /* 首页模块单列 */
  .matrix-grid,
  .fit-delivery-grid,
  .prepare-grid,
  .entry-grid,
  .advice-list,
  .unsuitable-list,
  .accept-list,
  .method-columns,
  .field-columns,
  .rhythm-columns,
  .compare-layout,
  .object-grid,
  .process-prepare .prepare-grid,
  .process-notes .notes-list,
  .support-entry-section .entry-grid,
  .feedback-list,
  .nextstep-list,
  .section-related .related-list,
  .related-entry .related-list,
  .error-link-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .definition-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
    padding: 16px 18px;
  }

  .process-timeline .timeline-item {
    grid-template-columns: 28px minmax(0, 1fr);
    gap: 14px;
  }

  .process-timeline .timeline-meta {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .process-timeline .timeline-meta dd {
    margin-bottom: 8px;
  }

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

  .timeline-item {
    padding-left: 24px;
  }

  .section-figure img,
  .scene-figure img,
  .faq-media .media-figure img {
    aspect-ratio: 16 / 9;
  }

  .related-links {
    padding: 16px 16px 0;
  }

  /* 页脚 */
  .site-footer {
    padding-top: 34px;
  }

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

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    padding: 16px 16px 22px;
  }

  .error-main {
    padding: 44px 0 52px;
  }

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

@media (max-width: 420px) {
  .container {
    padding: 0 14px;
  }

  .hero-main h1 {
    font-size: 22px;
  }

  .page-title,
  .error-title {
    font-size: 22px;
  }

  .btn {
    width: 100%;
  }

  .faq-question {
    font-size: 15px;
    padding: 12px 14px;
  }

  .faq-answer {
    padding: 12px 14px 16px;
  }
}