/* ==========================================================================
   91视频 · 企业影像制作与视频营销服务
   全站样式表：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. BASE — 变量、重置、基础排版
   -------------------------------------------------------------------------- */

:root {
  --color-primary: #0B5FD9;
  --color-primary-soft: #EAF1FD;
  --color-accent: #F26A2E;
  --color-accent-soft: #FDF0E9;
  --color-page: #F4F6F9;
  --color-card: #FFFFFF;
  --color-line: #E2E6EC;
  --color-line-strong: #CBD3DE;
  --color-text: #1D2430;
  --color-text-soft: #5B6675;
  --color-text-muted: #3C4757;
  --color-ok: #0F7B4F;
  --color-ok-soft: #E9F5EF;

  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  --shadow-card: 0 1px 2px rgba(29, 36, 48, 0.05);
  --shadow-raise: 0 6px 18px rgba(29, 36, 48, 0.08);

  --container: 1180px;
  --gutter: 24px;
  --gap-col: 32px;

  --header-h: 64px;
  --taskbar-h: 56px;

  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
    "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
}

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

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

body {
  margin: 0;
  background: var(--color-page);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

p {
  margin: 0;
}

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

dl,
dd,
dt {
  margin: 0;
}

figure {
  margin: 0;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

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

table {
  border-collapse: collapse;
}

/* --------------------------------------------------------------------------
   2. LAYOUT — 全站骨架：页头、导航、主容器、页脚、移动任务栏
   -------------------------------------------------------------------------- */

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

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  max-width: var(--container);
  height: var(--header-h);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.brand {
  flex: 0 0 auto;
  color: var(--color-text);
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0;
}

.brand:hover {
  color: var(--color-primary);
  text-decoration: none;
}

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

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

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

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 12px;
  color: var(--color-text-muted);
  font-size: 15px;
  line-height: 1.2;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-primary);
  background: var(--color-primary-soft);
  border-color: var(--color-primary);
  text-decoration: none;
}

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

/* 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;
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-md);
}

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

/* 主内容 */
.site-main {
  flex: 1 1 auto;
  width: 100%;
}

.inner-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter) 48px;
}

/* 页脚 */
.site-footer {
  margin-top: 40px;
  background: #FFFFFF;
  border-top: 1px solid var(--color-line);
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 40px var(--gutter) 24px;
}

.footer-top {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap-col);
}

.footer-title {
  margin-bottom: 12px;
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
}

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

.footer-link {
  color: var(--color-text-soft);
  font-size: 14px;
  line-height: 1.6;
}

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

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--color-line);
}

.footer-copy {
  color: var(--color-text-soft);
  font-size: 13px;
}

.footer-note {
  max-width: 620px;
  color: var(--color-text-soft);
  font-size: 13px;
  line-height: 1.7;
}

/* 移动端底部任务栏（桌面隐藏） */
.mobile-taskbar {
  display: none;
}

/* --------------------------------------------------------------------------
   3. COMPONENTS — 通用组件：按钮、面包屑、页标题区、区块标题、卡片、列表
   -------------------------------------------------------------------------- */

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn:hover {
  text-decoration: none;
}

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

.btn-primary:hover {
  background: #0A52BC;
  border-color: #0A52BC;
}

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

.btn-accent:hover {
  background: #D95A21;
  border-color: #D95A21;
}

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

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

/* 文本链接 */
.text-link,
.inline-link,
.link-inline,
.related-link,
.aside-link,
.error-link,
.fit-link,
.service-item-link,
.industry-link,
.panel-link {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 600;
}

.text-link::after,
.inline-link::after,
.link-inline::after,
.fit-link::after,
.service-item-link::after,
.industry-link::after,
.panel-link::after {
  content: "›";
  margin-left: 4px;
  font-size: 16px;
  line-height: 1;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 16px 0 0;
  color: var(--color-text-soft);
  font-size: 13px;
  line-height: 1.5;
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text-soft);
}

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

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

.breadcrumb-item.is-current,
.breadcrumb-current {
  color: var(--color-text);
  font-weight: 600;
}

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

/* 页面标题区 */
.page-header {
  padding: 20px 0 0;
}

.page-title {
  font-size: 28px;
  line-height: 1.3;
  font-weight: 700;
  color: var(--color-text);
}

.page-title-section,
section.page-title {
  margin-top: 16px;
  background: #F4F6F9;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.page-title-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 300px);
  gap: var(--gap-col);
  align-items: start;
  max-width: var(--container);
  margin: 0 auto;
  padding: 22px var(--gutter) 24px;
}

.page-title-main,
.page-title-text {
  min-width: 0;
}

.page-lead,
.page-title-lead {
  color: var(--color-text-muted);
  font-size: 16px;
  line-height: 1.75;
}

.page-title-meta,
.page-meta {
  padding-left: 20px;
  border-left: 2px solid var(--color-line-strong);
}

.page-title-meta dt,
.page-meta dt {
  color: var(--color-text-soft);
  font-size: 13px;
  font-weight: 600;
}

.page-title-meta dd,
.page-meta dd {
  margin-bottom: 10px;
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.6;
}

.page-title-meta dd:last-child,
.page-meta dd:last-child {
  margin-bottom: 0;
}

.meta-label {
  color: var(--color-text-soft);
  font-size: 13px;
  font-weight: 600;
}

.meta-text {
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.65;
}

/* 区块标题 */
.section-head {
  max-width: 860px;
  margin-bottom: 24px;
}

.section-title {
  font-size: 22px;
  line-height: 1.35;
  font-weight: 700;
  color: var(--color-text);
}

.section-desc,
.section-intro,
.section-lead {
  margin-top: 8px;
  color: var(--color-text-soft);
  font-size: 15px;
  line-height: 1.75;
}

/* 通用卡片与面板 */
.panel-title {
  margin-bottom: 12px;
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text);
}

/* 图片容器 */
.hero-figure,
.section-figure,
.content-media,
.industry-media,
.media-figure,
.compare-figure,
.coop-figure,
.page-media {
  overflow: hidden;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.hero-figure img,
.section-figure img,
.content-media img,
.industry-media img,
.media-figure img,
.compare-figure img,
.coop-figure img,
.page-media img {
  width: 100%;
  height: auto;
  object-fit: cover;
  background: #E9EDF3;
}

.hero-caption,
.section-caption,
.media-caption,
figcaption {
  padding: 10px 14px;
  color: var(--color-text-soft);
  font-size: 13px;
  line-height: 1.6;
  border-top: 1px solid var(--color-line);
}

/* 折叠问答（首页与支持页共用外观，作用域分开） */
.faq-question {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 16px 44px 16px 18px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  position: absolute;
  top: 14px;
  right: 18px;
  width: 22px;
  height: 22px;
  color: var(--color-primary);
  font-size: 18px;
  font-weight: 700;
  line-height: 22px;
  text-align: center;
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-sm);
}

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

.faq-answer {
  padding: 0 18px 18px;
}

.faq-conclusion {
  padding-left: 12px;
  color: var(--color-ok);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.7;
  border-left: 3px solid var(--color-ok);
}

.faq-text,
.faq-note {
  margin-top: 8px;
  color: var(--color-text-soft);
  font-size: 15px;
  line-height: 1.75;
}

/* 相关入口列表 */
.related-entry,
.related-links {
  margin-top: 40px;
}

.related-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.related-item {
  padding: 16px 18px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.related-text {
  margin-top: 6px;
  color: var(--color-text-soft);
  font-size: 14px;
  line-height: 1.7;
}

/* 术语提示 */
.term-tip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  margin-left: 4px;
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 700;
  background: var(--color-primary-soft);
  border: 1px solid var(--color-primary);
  border-radius: 50%;
  vertical-align: middle;
}

.term-note {
  margin-top: 8px;
  padding: 10px 12px;
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.7;
  background: var(--color-primary-soft);
  border-radius: var(--radius-md);
}

/* 进入视口的轻量淡入（默认可见，仅增强） */
.reveal {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: no-preference) {
  .reveal {
    transition: opacity 0.4s ease, transform 0.4s ease;
  }

  .reveal.is-entering {
    opacity: 0;
    transform: translateY(10px);
  }
}

/* --------------------------------------------------------------------------
   4. PAGES — 首页
   -------------------------------------------------------------------------- */

.home-main {
  display: block;
}

/* 首屏 */
.hero {
  display: grid;
  grid-template-columns: minmax(240px, 300px) minmax(0, 1fr);
  gap: var(--gap-col);
  align-items: start;
  max-width: var(--container);
  margin: 0 auto;
  padding: 36px var(--gutter) 44px;
}

.hero-index {
  padding: 20px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

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

.hero-index-note {
  margin-top: 6px;
  color: var(--color-text-soft);
  font-size: 13px;
  line-height: 1.65;
}

.hero-index-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 14px;
}

.hero-index-link {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-height: 44px;
  padding: 10px 12px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-line-strong);
  border-radius: var(--radius-md);
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.hero-index-link:hover,
.hero-index-link:focus-visible {
  background: var(--color-primary-soft);
  border-left-color: var(--color-primary);
  text-decoration: none;
}

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

.hero-index-desc {
  color: var(--color-text-soft);
  font-size: 13px;
  line-height: 1.55;
}

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

.hero-eyebrow {
  color: var(--color-accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
}

.hero-title {
  margin-top: 10px;
  font-size: 34px;
  line-height: 1.25;
  font-weight: 700;
}

.hero-lead {
  max-width: 720px;
  margin-top: 14px;
  color: var(--color-text-muted);
  font-size: 16px;
  line-height: 1.75;
}

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

.hero-figure {
  margin-top: 26px;
}

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

/* 服务项目列表 */
.services-list,
.selector,
.industries,
.workflow,
.delivery,
.faq,
.coop-entry {
  max-width: var(--container);
  margin: 0 auto;
  padding: 40px var(--gutter);
  border-top: 1px solid var(--color-line);
}

.services-list {
  border-top: 0;
}

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

.service-items {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
}

.service-item {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(0, 1.4fr) auto;
  gap: 12px 24px;
  align-items: center;
  padding: 18px 20px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-line-strong);
  border-radius: var(--radius-lg);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.service-item:hover,
.service-item:focus-within {
  border-left-color: var(--color-primary);
  box-shadow: var(--shadow-raise);
}

.service-item-head {
  min-width: 0;
}

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

.service-item-tagline {
  margin-top: 4px;
  color: var(--color-text-soft);
  font-size: 14px;
  line-height: 1.65;
}

.service-item-scene {
  min-width: 0;
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.7;
}

/* 需求判断与片型组合 */
.selector-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--gap-col);
  align-items: start;
}

.judge-panel,
.result-panel {
  padding: 22px 20px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.judge-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.judge-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 14px;
  border-left: 3px solid var(--color-primary-soft);
}

.judge-question {
  color: var(--color-text);
  font-size: 15px;
  font-weight: 600;
}

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

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

.result-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px;
  background: var(--color-primary-soft);
  border-radius: var(--radius-md);
}

.result-combo {
  color: var(--color-primary);
  font-size: 15px;
  font-weight: 700;
}

.result-why {
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.7;
}

.result-panel .panel-link {
  margin-top: 16px;
}

/* 应用行业场景 */
.industries-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.industry-cell {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-top: 3px solid var(--color-primary);
  border-radius: var(--radius-lg);
}

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

.industry-object {
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.7;
}

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

.industry-cell .industry-link {
  margin-top: auto;
}

/* 制作流程 */
.workflow-track {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
}

.workflow-node {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.workflow-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 700;
  background: var(--color-primary);
  border-radius: var(--radius-sm);
}

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

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

.workflow-more {
  margin-top: 18px;
}

/* 交付标准 */
.delivery-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--gap-col);
  align-items: start;
}

.delivery-items,
.acceptance-points {
  padding: 22px 20px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.delivery-list,
.acceptance-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.delivery-item,
.acceptance-item {
  position: relative;
  padding-left: 26px;
  color: var(--color-text-muted);
  font-size: 15px;
  line-height: 1.7;
}

.delivery-item::before,
.acceptance-item::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 1px;
  color: var(--color-ok);
  font-size: 14px;
  font-weight: 700;
}

/* 首页问答 */
.faq-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 14px;
}

.faq-item {
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.faq-detail {
  height: 100%;
}

.faq-more {
  margin-top: 18px;
}

/* 合作对接入口 */
.coop-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.coop-item {
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

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

.coop-text {
  margin-top: 6px;
  color: var(--color-text-soft);
  font-size: 14px;
  line-height: 1.7;
}

.coop-entry .btn-accent {
  margin-top: 22px;
}

/* --------------------------------------------------------------------------
   5. PAGES — 内页：服务项目
   -------------------------------------------------------------------------- */

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 300px);
  gap: var(--gap-col);
  align-items: start;
  max-width: var(--container);
  margin: 0 auto;
  padding: 32px var(--gutter) 0;
}

.page-layout.sidebar-left {
  grid-template-columns: minmax(240px, 300px) minmax(0, 1fr);
}

.sidebar-left .page-layout {
  grid-template-columns: minmax(240px, 300px) minmax(0, 1fr);
}

/* 左侧服务目录 */
.service-index {
  position: sticky;
  top: calc(var(--header-h) + 16px);
  padding: 20px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

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

.index-intro {
  margin-top: 6px;
  color: var(--color-text-soft);
  font-size: 13px;
  line-height: 1.65;
}

.index-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 14px;
}

.index-link {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 12px;
  color: var(--color-text-muted);
  font-size: 15px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  transition: border-color 0.15s ease, background-color 0.15s ease, color 0.15s ease;
}

.index-link:hover,
.index-link:focus-visible {
  color: var(--color-primary);
  background: var(--color-primary-soft);
  border-color: var(--color-primary);
  text-decoration: none;
}

.index-note {
  margin-top: 14px;
  padding-top: 12px;
  color: var(--color-text-soft);
  font-size: 13px;
  line-height: 1.7;
  border-top: 1px solid var(--color-line);
}

/* 服务详述 */
.services-detail {
  min-width: 0;
}

.service-block {
  padding: 24px 22px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.service-block + .service-block {
  margin-top: 20px;
}

.service-name {
  font-size: 22px;
  line-height: 1.35;
  font-weight: 700;
}

.service-position {
  margin-top: 8px;
  color: var(--color-text-muted);
  font-size: 15px;
  line-height: 1.75;
}

.service-subtitle {
  margin-top: 22px;
  padding-bottom: 8px;
  font-size: 17px;
  font-weight: 700;
  border-bottom: 1px solid var(--color-line);
}

.service-scope,
.service-fit {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}

.service-scope li,
.service-fit li {
  position: relative;
  padding-left: 20px;
  color: var(--color-text-muted);
  font-size: 15px;
  line-height: 1.75;
}

.service-scope li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 11px;
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 50%;
}

.service-fit li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 1px;
  color: var(--color-ok);
  font-size: 14px;
  font-weight: 700;
}

.service-spec {
  display: grid;
  grid-template-columns: minmax(120px, 180px) minmax(0, 1fr);
  gap: 0;
  margin-top: 12px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.service-spec dt {
  padding: 10px 14px;
  color: var(--color-text);
  font-size: 14px;
  font-weight: 600;
  background: var(--color-page);
  border-bottom: 1px solid var(--color-line);
}

.service-spec dd {
  padding: 10px 14px;
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.7;
  border-bottom: 1px solid var(--color-line);
}

.service-spec dt:last-of-type,
.service-spec dd:last-of-type {
  border-bottom: 0;
}

/* 内页内嵌配图（服务项目页） */
.content-media-inline {
  max-width: var(--container);
  margin: 0 auto;
}

.content-media-inline img {
  aspect-ratio: 21 / 9;
}

/* 片型速查表 */
.fit-table,
.fit-notes,
.pitfalls {
  max-width: var(--container);
  margin: 0 auto;
  padding: 40px var(--gutter) 0;
}

.fit-rows {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #FFFFFF;
}

.fit-row {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) minmax(120px, auto);
  gap: 12px 20px;
  align-items: center;
  padding: 14px 18px;
  border-bottom: 1px solid var(--color-line);
}

.fit-row:last-child {
  border-bottom: 0;
}

.fit-use {
  color: var(--color-text);
  font-size: 15px;
  font-weight: 600;
}

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

/* 配合要点与误区 */
.fit-note-list,
.pitfall-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.fit-note-item,
.pitfall-item {
  padding: 20px 18px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.fit-note-title,
.pitfall-title {
  font-size: 16px;
  font-weight: 700;
}

.fit-note-text,
.pitfall-text {
  margin-top: 8px;
  color: var(--color-text-soft);
  font-size: 14px;
  line-height: 1.75;
}

.pitfall-item {
  border-left: 3px solid var(--color-accent);
}

/* --------------------------------------------------------------------------
   6. PAGES — 内页：影像选型
   -------------------------------------------------------------------------- */

.compare,
.order,
.combos,
.compare-notes {
  max-width: var(--container);
  margin: 0 auto;
  padding: 40px var(--gutter) 0;
}

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

.compare-table {
  margin-top: 22px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #FFFFFF;
}

.compare-row {
  display: grid;
  grid-template-columns: minmax(140px, 180px) minmax(0, 1fr);
  border-bottom: 1px solid var(--color-line);
}

.compare-row:last-child {
  border-bottom: 0;
}

.compare-row-head {
  background: var(--color-page);
}

.dimension-column {
  display: flex;
  align-items: center;
  padding: 12px 16px;
  color: var(--color-text);
  font-size: 14px;
  font-weight: 600;
  border-right: 1px solid var(--color-line);
}

.plan-columns {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.plan-column {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 12px 14px;
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.7;
  border-right: 1px solid var(--color-line);
}

.plan-column:last-child {
  border-right: 0;
}

.compare-row-head .plan-column {
  color: var(--color-primary);
  font-size: 15px;
  font-weight: 700;
  background: var(--color-primary-soft);
}

/* 判断顺序 */
.order-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  counter-reset: order-step;
}

.order-step {
  padding: 20px 18px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.order-step h3 {
  font-size: 16px;
  font-weight: 700;
}

.order-question {
  margin-top: 8px;
  color: var(--color-text);
  font-size: 15px;
  font-weight: 600;
}

.order-basis,
.order-result {
  margin-top: 6px;
  color: var(--color-text-soft);
  font-size: 14px;
  line-height: 1.75;
}

.order-result {
  padding-top: 8px;
  color: var(--color-ok);
  border-top: 1px dashed var(--color-line);
}

/* 搭配组合 */
.combo-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.combo-item {
  padding: 20px 18px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-top: 3px solid var(--color-primary);
  border-radius: var(--radius-lg);
}

.combo-item h3 {
  font-size: 16px;
  font-weight: 700;
}

.combo-main,
.combo-sub {
  margin-top: 8px;
  color: var(--color-text);
  font-size: 14px;
  font-weight: 600;
}

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

/* 使用说明 */
.notes-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.note-item {
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.note-item h3 {
  font-size: 16px;
  font-weight: 700;
}

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

.notes-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 20px;
}

/* --------------------------------------------------------------------------
   7. PAGES — 内页：应用行业
   -------------------------------------------------------------------------- */

.industry-list {
  min-width: 0;
}

.industry-block {
  padding: 24px 22px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.industry-block + .industry-block {
  margin-top: 20px;
}

.industry-block .industry-name {
  font-size: 22px;
  line-height: 1.35;
}

.industry-media {
  margin-top: 16px;
}

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

.industry-facts {
  display: grid;
  grid-template-columns: minmax(120px, 160px) minmax(0, 1fr);
  margin-top: 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.industry-facts dt {
  padding: 10px 14px;
  color: var(--color-text);
  font-size: 14px;
  font-weight: 600;
  background: var(--color-page);
  border-bottom: 1px solid var(--color-line);
}

.industry-facts dd {
  padding: 10px 14px;
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.75;
  border-bottom: 1px solid var(--color-line);
}

.industry-facts dt:last-of-type,
.industry-facts dd:last-of-type {
  border-bottom: 0;
}

/* 右侧速览栏 */
.industry-aside {
  position: sticky;
  top: calc(var(--header-h) + 16px);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.aside-block {
  padding: 20px 18px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.aside-title {
  margin-bottom: 12px;
  font-size: 16px;
  font-weight: 700;
}

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

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

.aside-link {
  display: block;
  min-height: 28px;
  padding: 6px 0;
  color: var(--color-text-muted);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.7;
  border-bottom: 1px solid var(--color-line);
}

.aside-item:last-child .aside-link {
  border-bottom: 0;
}

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

/* 用途组合 */
.combination {
  max-width: var(--container);
  margin: 0 auto;
  padding: 40px var(--gutter) 0;
}

.combination-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.combination-card {
  padding: 20px 18px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.combination-title {
  font-size: 16px;
  font-weight: 700;
}

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

/* --------------------------------------------------------------------------
   8. PAGES — 内页：制作流程
   -------------------------------------------------------------------------- */

.timeline,
.roles,
.workflow-media,
.deliverables,
.acceptance {
  max-width: var(--container);
  margin: 0 auto;
  padding: 40px var(--gutter) 0;
}

.timeline-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 16px;
}

.timeline-node {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.node-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 700;
  background: var(--color-primary);
  border-radius: var(--radius-sm);
}

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

.node-output {
  color: var(--color-text);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.7;
}

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

/* 双方分工 */
.roles-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--gap-col);
  align-items: start;
}

.enterprise-side,
.production-side {
  padding: 22px 20px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.roles-subtitle {
  padding-bottom: 10px;
  font-size: 17px;
  font-weight: 700;
  border-bottom: 1px solid var(--color-line);
}

.roles-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 14px;
}

.roles-list li {
  position: relative;
  padding-left: 20px;
  color: var(--color-text-muted);
  font-size: 15px;
  line-height: 1.75;
}

.roles-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 11px;
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 50%;
}

/* 流程配图 */
.media-figure img {
  aspect-ratio: 21 / 9;
}

/* 交付物与验收 */
.deliverable-list,
.acceptance {
  min-width: 0;
}

.deliverable-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.deliverable-item,
.acceptance .acceptance-item {
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.deliverable-name,
.acceptance-name {
  font-size: 16px;
  font-weight: 700;
}

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

.acceptance .acceptance-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.acceptance .acceptance-item {
  position: relative;
  padding-left: 42px;
}

.acceptance .acceptance-item::before {
  content: "✓";
  position: absolute;
  left: 18px;
  top: 20px;
  color: var(--color-ok);
  font-size: 15px;
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   9. PAGES — 内页：服务支持（问答）
   -------------------------------------------------------------------------- */

.page-media {
  max-width: var(--container);
  margin: 24px auto 0;
  padding: 0 var(--gutter);
  border: 0;
  background: transparent;
}

.page-media img {
  aspect-ratio: 21 / 9;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.page-media .media-caption {
  padding: 10px 0 0;
  border-top: 0;
}

.faq-anchors {
  max-width: var(--container);
  margin: 24px auto 0;
  padding: 0 var(--gutter);
}

.faq-anchor-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.faq-anchor-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 16px;
  color: var(--color-text-muted);
  font-size: 14px;
  font-weight: 600;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
}

.faq-anchor-link:hover,
.faq-anchor-link:focus-visible {
  color: var(--color-primary);
  background: var(--color-primary-soft);
  border-color: var(--color-primary);
  text-decoration: none;
}

.faq-group,
.prepare-note {
  max-width: var(--container);
  margin: 0 auto;
  padding: 40px var(--gutter) 0;
}

.faq-group .faq-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 14px;
}

.faq-group .faq-item {
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.prepare-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.prepare-item {
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-lg);
}

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

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

/* --------------------------------------------------------------------------
   10. PAGES — 内页：合作对接
   -------------------------------------------------------------------------- */

.coop-steps {
  min-width: 0;
}

.coop-steps > h2 {
  font-size: 22px;
  line-height: 1.35;
}

.coop-steps .section-lead {
  margin-top: 8px;
}

.step-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 20px;
}

.step-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 20px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 700;
  background: var(--color-primary);
  border-radius: var(--radius-sm);
}

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

.step-body h3 {
  font-size: 16px;
  font-weight: 700;
}

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

.step-meta {
  padding-top: 8px;
  color: var(--color-text-muted);
  font-size: 13px;
  border-top: 1px dashed var(--color-line);
}

.coop-figure {
  margin-top: 20px;
}

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

/* 需求信息清单面板 */
.requirement-panel {
  position: sticky;
  top: calc(var(--header-h) + 16px);
  padding: 22px 20px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.requirement-panel > h2 {
  font-size: 18px;
  font-weight: 700;
}

.panel-lead {
  margin-top: 6px;
  color: var(--color-text-soft);
  font-size: 13px;
  line-height: 1.7;
}

.req-group {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--color-line);
}

.req-group h3 {
  font-size: 15px;
  font-weight: 700;
}

.req-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 10px;
}

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

.req-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 10px;
  width: 5px;
  height: 5px;
  background: var(--color-primary);
  border-radius: 50%;
}

/* 启动条件 */
.conditions,
.budget-note {
  max-width: var(--container);
  margin: 0 auto;
  padding: 40px var(--gutter) 0;
}

.conditions h2,
.budget-note h2 {
  font-size: 22px;
  line-height: 1.35;
}

.conditions .section-lead,
.budget-note > p {
  margin-top: 8px;
  color: var(--color-text-soft);
  font-size: 15px;
  line-height: 1.75;
}

.conditions-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--gap-col);
  align-items: start;
  margin-top: 20px;
}

.conditions-col {
  padding: 20px 18px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.conditions-col h3 {
  padding-bottom: 10px;
  font-size: 16px;
  font-weight: 700;
  border-bottom: 1px solid var(--color-line);
}

.conditions-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 14px;
}

.conditions-list li {
  position: relative;
  padding-left: 22px;
  color: var(--color-text-muted);
  font-size: 15px;
  line-height: 1.75;
}

.conditions-col.is-ready {
  border-top: 3px solid var(--color-ok);
}

.conditions-col.is-ready .conditions-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 1px;
  color: var(--color-ok);
  font-size: 14px;
  font-weight: 700;
}

.conditions-col.is-hold {
  border-top: 3px solid var(--color-accent);
}

.conditions-col.is-hold .conditions-list li::before {
  content: "!";
  position: absolute;
  left: 2px;
  top: 0;
  color: var(--color-accent);
  font-size: 14px;
  font-weight: 700;
}

/* 预算与周期沟通 */
.budget-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.budget-list li {
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.budget-list h3 {
  font-size: 16px;
  font-weight: 700;
}

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

.budget-note-foot {
  margin-top: 18px;
  padding: 14px 16px;
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.75;
  background: var(--color-primary-soft);
  border-radius: var(--radius-md);
}

/* --------------------------------------------------------------------------
   11. PAGES — 404
   -------------------------------------------------------------------------- */

.error-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px var(--gutter) 0;
}

.error-block {
  padding: 36px 28px;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.error-code {
  color: var(--color-accent);
  font-size: 14px;
  font-weight: 700;
}

.error-title {
  margin-top: 8px;
  font-size: 28px;
  line-height: 1.3;
}

.error-desc {
  max-width: 720px;
  margin-top: 12px;
  color: var(--color-text-soft);
  font-size: 16px;
  line-height: 1.75;
}

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

.error-links {
  margin-top: 40px;
}

.error-links-title {
  font-size: 22px;
  line-height: 1.35;
}

.error-link-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.error-link {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 0 16px;
  color: var(--color-text-muted);
  font-size: 15px;
  font-weight: 600;
  background: #FFFFFF;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.error-link:hover,
.error-link:focus-visible {
  color: var(--color-primary);
  background: var(--color-primary-soft);
  border-color: var(--color-primary);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   12. RESPONSIVE — 1024 / 768 / 640
   -------------------------------------------------------------------------- */

@media (max-width: 1080px) {
  .hero {
    grid-template-columns: minmax(220px, 260px) minmax(0, 1fr);
  }

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

@media (max-width: 900px) {
  .page-layout,
  .page-layout.sidebar-left,
  .sidebar-left .page-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .service-index,
  .industry-aside,
  .requirement-panel {
    position: static;
    top: auto;
  }

  .page-title-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .page-title-meta,
  .page-meta {
    padding-left: 0;
    padding-top: 12px;
    border-left: 0;
    border-top: 1px solid var(--color-line);
  }

  .compare-row {
    grid-template-columns: minmax(120px, 150px) minmax(0, 1fr);
  }

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

  .plan-column:nth-child(2n) {
    border-right: 0;
  }

  .plan-column {
    border-bottom: 1px solid var(--color-line);
  }

  .compare-row:last-child .plan-column:last-child,
  .compare-row:last-child .plan-column:nth-last-child(2) {
    border-bottom: 0;
  }
}

@media (max-width: 768px) {
  :root {
    --gutter: 16px;
    --gap-col: 20px;
  }

  /* 页头与移动导航 */
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    z-index: 50;
    display: block;
    padding: 0 var(--gutter);
    background: #FFFFFF;
    border-bottom: 1px solid var(--color-line);
    box-shadow: var(--shadow-raise);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    gap: 0;
    padding: 8px 0 12px;
  }

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

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

  .nav-link {
    display: flex;
    width: 100%;
    min-height: 48px;
    padding: 0 12px;
    border-width: 1px;
    border-color: transparent;
  }

  /* 首屏改为单列，主内容在前 */
  .hero {
    grid-template-columns: minmax(0, 1fr);
    padding-top: 24px;
  }

  .hero-main {
    order: 1;
  }

  .hero-index {
    order: 2;
  }

  .hero-title {
    font-size: 28px;
  }

  .hero-index-list {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .hero-index-list > li {
    flex: 1 1 200px;
    min-width: 0;
  }

  .hero-index-link {
    height: 100%;
  }

  /* 服务列表行改上下堆叠 */
  .service-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .service-item-link {
    min-height: 44px;
  }

  /* 双栏模块改单列 */
  .selector-layout,
  .delivery-layout,
  .roles-columns,
  .conditions-columns {
    grid-template-columns: minmax(0, 1fr);
  }

  .service-spec,
  .industry-facts {
    grid-template-columns: minmax(0, 1fr);
  }

  .service-spec dt,
  .industry-facts dt {
    border-bottom: 0;
  }

  /* 对照表改为逐维度卡片 */
  .compare-table {
    display: block;
    border: 0;
    background: transparent;
  }

  .compare-row {
    display: block;
    margin-bottom: 14px;
    background: #FFFFFF;
    border: 1px solid var(--color-line);
    border-radius: var(--radius-lg);
    overflow: hidden;
  }

  .compare-row-head {
    display: none;
  }

  .dimension-column {
    display: block;
    padding: 12px 16px;
    background: var(--color-page);
    border-right: 0;
    border-bottom: 1px solid var(--color-line);
  }

  .plan-columns {
    display: block;
  }

  .plan-column {
    display: block;
    min-height: 0;
    padding: 10px 16px;
    border-right: 0;
    border-bottom: 1px solid var(--color-line);
  }

  .plan-column:last-child {
    border-bottom: 0;
  }

  /* 列表与网格统一单列 */
  .industries-grid,
  .workflow-track,
  .faq-list,
  .faq-group .faq-list,
  .coop-list,
  .fit-note-list,
  .pitfall-list,
  .order-steps,
  .combo-list,
  .notes-list,
  .combination-grid,
  .timeline-list,
  .deliverable-list,
  .acceptance .acceptance-list,
  .prepare-list,
  .budget-list,
  .related-list,
  .error-link-list {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .step-item {
    grid-template-columns: 32px minmax(0, 1fr);
    gap: 12px;
    padding: 16px;
  }

  .step-num {
    width: 30px;
    height: 30px;
    font-size: 14px;
  }

  /* 页脚 */
  .footer-top {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

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

  /* 移动任务栏 */
  .site-body {
    padding-bottom: var(--taskbar-h);
  }

  .mobile-taskbar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 45;
    display: block;
    background: #FFFFFF;
    border-top: 1px solid var(--color-line);
  }

  .taskbar-list {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    max-width: var(--container);
    margin: 0 auto;
  }

  .taskbar-item {
    min-width: 0;
  }

  .taskbar-link {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: var(--taskbar-h);
    padding: 0 4px;
    color: var(--color-text-soft);
    font-size: 13px;
    font-weight: 600;
    text-align: center;
  }

  .taskbar-link:hover,
  .taskbar-link:focus-visible {
    color: var(--color-primary);
    text-decoration: none;
  }

  .taskbar-link.is-current {
    color: var(--color-primary);
    background: var(--color-primary-soft);
  }

  /* 内页间距 */
  .inner-main {
    padding-bottom: 32px;
  }

  .services-list,
  .selector,
  .industries,
  .workflow,
  .delivery,
  .faq,
  .coop-entry,
  .fit-table,
  .fit-notes,
  .pitfalls,
  .compare,
  .order,
  .combos,
  .compare-notes,
  .combination,
  .timeline,
  .roles,
  .workflow-media,
  .deliverables,
  .acceptance,
  .faq-group,
  .prepare-note,
  .conditions,
  .budget-note {
    padding-top: 32px;
  }

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

  .page-title-inner {
    padding: 18px var(--gutter) 20px;
  }

  .hero-figure img,
  .section-figure img,
  .content-media img,
  .industry-media img,
  .media-figure img,
  .compare-figure img,
  .coop-figure img,
  .page-media img {
    aspect-ratio: 16 / 9;
  }

  .error-main {
    padding-top: 28px;
  }

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

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

@media (max-width: 480px) {
  .hero-index-list > li {
    flex: 1 1 100%;
  }

  .btn {
    width: 100%;
  }

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

  .faq-anchor-list {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 4px;
  }

  .faq-anchor-item {
    flex: 0 0 auto;
  }
}

/* 程序验收反馈：修复网格孤项 */
@media (min-width: 769px) {
  .industries-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}