/* ============================================================
   zeetang.com · 糖心原创vlog 全站样式表
   版本：1.0
   说明：本文件为全站唯一样式表，覆盖首页、全部内页与404页。
   分组：base / layout / components / pages / responsive
   ============================================================ */

/* ============================================================
   Base —— 全局基础
   ============================================================ */
:root {
  --color-primary: #0F766E;
  --color-primary-dark: #115E59;
  --color-primary-light: #CCFBF1;
  --color-accent: #D97706;
  --color-accent-light: #FEF3C7;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F8FAFC;
  --color-text: #1E293B;
  --color-text-secondary: #64748B;
  --color-border: #E2E8F0;
  --color-border-light: #F1F5F9;
  --color-white: #FFFFFF;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --container-width: 1200px;
  --container-padding: 24px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04), 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.06), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.06), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --transition-base: 160ms ease;
  --font-size-h1: 28px;
  --font-size-h2: 22px;
  --font-size-h3: 18px;
  --font-size-body: 16px;
  --font-size-small: 14px;
  --line-height-body: 1.8;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-body);
  line-height: var(--line-height-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-text);
}

h1 {
  font-size: var(--font-size-h1);
}

h2 {
  font-size: var(--font-size-h2);
}

h3 {
  font-size: var(--font-size-h3);
}

p {
  margin-bottom: 12px;
}

strong {
  font-weight: 600;
}

/* ============================================================
   Layout —— 全站布局骨架
   ============================================================ */

/* 站点整体骨架 */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-main {
  flex: 1 0 auto;
}

/* 页头 */
.site-header {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border-light);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  color: var(--color-text);
}

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

.brand-name {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--color-primary);
  white-space: nowrap;
}

/* 主导航 */
.site-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-list a {
  display: inline-block;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-base), border-color var(--transition-base);
}

.nav-list a:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.nav-list a.is-current {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: 600;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 44px;
  height: 44px;
  padding: 10px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
}

.nav-toggle:hover {
  background-color: var(--color-bg-alt);
}

.nav-toggle-icon,
.nav-toggle-icon::before,
.nav-toggle-icon::after {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  position: relative;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle-icon::before {
  top: -7px;
}

.nav-toggle-icon::after {
  top: 7px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon {
  background-color: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
  transform: rotate(45deg);
  top: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
  transform: rotate(-45deg);
  top: 0;
}

/* 页头右侧 CTA */
.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-white);
  background-color: var(--color-primary);
  border-radius: var(--radius-md);
  padding: 8px 18px;
  white-space: nowrap;
  transition: background-color var(--transition-base), transform var(--transition-base);
  flex-shrink: 0;
}

.header-cta:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(-1px);
}

/* 页脚 */
.site-footer {
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border-light);
  margin-top: 0;
}

.footer-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px var(--container-padding) 24px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-brand-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.footer-tagline {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.footer-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 14px;
}

.footer-links ul li {
  margin-bottom: 10px;
}

.footer-links ul a {
  font-size: 14px;
  color: var(--color-text-secondary);
  transition: color var(--transition-base);
}

.footer-links ul a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  border-top: 1px solid var(--color-border-light);
  padding: 16px var(--container-padding);
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin: 0;
  max-width: var(--container-width);
  margin: 0 auto;
}

/* 内页统一骨架 */
.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding) 64px;
  width: 100%;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 16px 0;
  font-size: 14px;
  color: var(--color-text-secondary);
}

.breadcrumb a {
  color: var(--color-text-secondary);
  transition: color var(--transition-base);
}

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

.breadcrumb-sep {
  color: var(--color-border);
  user-select: none;
}

.breadcrumb-current {
  color: var(--color-text);
  font-weight: 500;
}

/* 页面标题区 */
.page-header {
  padding: 16px 0 32px;
  border-bottom: 1px solid var(--color-border-light);
  margin-bottom: 40px;
}

.page-title {
  font-size: var(--font-size-h1);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
  line-height: 1.4;
}

.page-description {
  font-size: 16px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  max-width: 720px;
  margin: 0;
}

/* 通用 section 标题 */
.section-title {
  font-size: var(--font-size-h2);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
  line-height: 1.4;
}

.section-intro {
  margin-bottom: 32px;
}

.section-intro p {
  color: var(--color-text-secondary);
  font-size: 15px;
}

/* ============================================================
   Components —— 通用组件
   ============================================================ */

/* 首页按钮 */
.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  padding: 12px 28px;
  min-height: 44px;
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  border: 1px solid var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--color-bg);
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background-color: var(--color-bg-alt);
  transform: translateY(-1px);
}

/* 文本链接 */
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-primary);
  transition: color var(--transition-base), gap var(--transition-base);
}

.text-link:hover {
  color: var(--color-primary-dark);
  gap: 8px;
}

/* 内容图片容器 */
.content-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-bg-alt);
}

.content-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.content-media figcaption {
  font-size: 13px;
  color: var(--color-text-secondary);
  padding: 8px 12px;
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border-light);
}

/* 首页内容图片 */
.content-media-primary {
  width: 100%;
  aspect-ratio: 16 / 10;
}

/* 通用 section 块 */
.section-block {
  padding: 64px 0;
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.section-block h2 {
  font-size: var(--font-size-h2);
  font-weight: 600;
  margin-bottom: 8px;
}

.section-intro {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

/* FAQ 折叠项 */
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-bg);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.faq-item:hover {
  border-color: var(--color-primary-light);
}

.faq-item[open] {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-sm);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  padding: 14px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  list-style: none;
  transition: color var(--transition-base);
}

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

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  font-weight: 400;
  color: var(--color-text-secondary);
  transition: transform var(--transition-base), color var(--transition-base);
  flex-shrink: 0;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
  color: var(--color-primary);
}

.faq-item summary:hover {
  color: var(--color-primary);
}

.faq-item > p {
  padding: 0 20px 16px;
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin: 0;
}

.faq-item > p a {
  font-weight: 500;
}

/* 相关链接条 */
.related-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border-light);
}

.related-links-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-right: 4px;
}

.related-links-item {
  display: inline-flex;
  align-items: center;
  font-size: 14px;
  color: var(--color-primary);
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  border-radius: 999px;
  padding: 6px 16px;
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

.related-links-item:hover {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary-light);
  color: var(--color-primary-dark);
}

/* ============================================================
   Pages —— 首页
   ============================================================ */

.home-main {
  background-color: var(--color-bg);
}

/* 首屏 hero */
.hero-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px var(--container-padding) 64px;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.hero-copy h1 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-text);
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 16px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 28px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.hero-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background-color: var(--color-bg-alt);
}

.hero-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

/* 服务项目概览 */
.services-overview {
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.service-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.service-card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.service-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
  position: relative;
  padding-left: 20px;
}

.service-card h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

.service-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.service-card a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition-base);
}

.service-card a:hover {
  gap: 8px;
}

/* 制作流程预览 */
.process-preview {
  background-color: var(--color-bg);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

.step-item {
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  background-color: var(--color-bg-alt);
  position: relative;
  transition: border-color var(--transition-base), background-color var(--transition-base);
}

.step-item:hover {
  border-color: var(--color-primary-light);
  background-color: var(--color-bg);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 14px;
}

.step-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.step-item p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin: 0;
}

/* 品质亮点 */
.quality-highlights {
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
}

.quality-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.quality-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.quality-card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-md);
}

.quality-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.quality-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
}

.quality-card a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
}

/* 案例记录精选 */
.records-preview {
  background-color: var(--color-bg);
}

.records-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

.record-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.record-card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-md);
}

.record-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-accent);
  background-color: var(--color-accent-light);
  border-radius: 999px;
  padding: 3px 12px;
  margin-bottom: 12px;
}

.record-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.record-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 8px;
}

.record-card a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 4px;
}

.record-card a:hover {
  gap: 8px;
}

/* 合作方式引导 */
.cooperation-guide {
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
}

.cooperation-guide > p {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

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

.coop-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
  display: block;
}

.coop-card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.coop-card h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.coop-card p {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* 常见问题摘选 */
.faq-preview {
  background-color: var(--color-bg);
}

.faq-preview .faq-item {
  max-width: 860px;
}

/* ============================================================
   Pages —— 服务项目页
   ============================================================ */

.services-catalog {
  margin-bottom: 48px;
}

.service-entry {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 32px;
  padding: 32px 0;
  border-bottom: 1px solid var(--color-border-light);
  align-items: start;
}

.service-entry:last-child {
  border-bottom: none;
}

.service-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.service-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-bg-alt);
}

.service-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.service-figure figcaption {
  font-size: 13px;
  color: var(--color-text-secondary);
  padding: 8px 12px;
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border-light);
}

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

.service-name {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.service-description {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}

.service-scene,
.service-delivery {
  margin-bottom: 16px;
}

.service-scene h4,
.service-delivery h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.service-scene ul,
.service-delivery ul {
  padding-left: 0;
}

.service-scene li,
.service-delivery li {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  padding-left: 16px;
  position: relative;
  margin-bottom: 4px;
}

.service-scene li::before,
.service-delivery li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  margin-top: 8px;
  transition: gap var(--transition-base);
}

.service-link:hover {
  gap: 8px;
}

/* 服务选择建议 */
.service-choice-guide {
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 48px;
}

.service-choice-guide p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 12px;
}

.service-choice-guide p:last-child {
  margin-bottom: 0;
}

.service-choice-guide strong {
  color: var(--color-text);
  font-weight: 600;
}

/* 相关链接条（服务页） */
.related-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.related-list li a {
  display: inline-flex;
  align-items: center;
  font-size: 14px;
  color: var(--color-primary);
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  border-radius: 999px;
  padding: 6px 16px;
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

.related-list li a:hover {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.related-title {
  font-size: 16px;
  margin-bottom: 16px;
}

/* ============================================================
   Pages —— 案例记录页
   ============================================================ */

.records-layout {
  margin-bottom: 48px;
}

.records-filter {
  margin-bottom: 32px;
}

.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.filter-tab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 8px 20px;
  min-height: 40px;
  cursor: pointer;
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

.filter-tab:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.filter-tab.is-active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
  font-weight: 600;
}

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

.records-list .record-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-bg);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.records-list .record-card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-md);
}

.record-media {
  overflow: hidden;
  background-color: var(--color-bg-alt);
}

.record-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 9;
  transition: transform 300ms ease;
}

.record-card:hover .record-media img {
  transform: scale(1.02);
}

.record-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

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

.record-item {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 8px;
}

.record-item strong {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 2px;
}

.record-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  margin-top: auto;
  padding-top: 12px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition-base);
}

.record-link:hover {
  gap: 8px;
}

/* 记录说明 */
.record-note {
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
}

.record-note p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin: 0;
}

/* ============================================================
   Pages —— 制作流程页
   ============================================================ */

.process-timeline {
  margin-bottom: 48px;
}

.timeline-steps {
  position: relative;
  padding-left: 32px;
}

.timeline-steps::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background-color: var(--color-border);
}

.timeline-item {
  position: relative;
  padding: 0 0 40px 24px;
}

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

.timeline-marker {
  position: absolute;
  left: -32px;
  top: 0;
  width: 44px;
  height: 44px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: 50%;
  z-index: 1;
}

.step-number {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}

.step-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.step-content {
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.step-desc {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.step-details {
  border-top: 1px solid var(--color-border-light);
  padding-top: 16px;
}

.step-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.step-list {
  margin-bottom: 16px;
}

.step-list li {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  padding-left: 16px;
  position: relative;
  margin-bottom: 4px;
}

.step-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-primary);
}

.step-deliverable {
  font-size: 14px;
  color: var(--color-primary);
  background-color: var(--color-primary-light);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  line-height: 1.7;
  margin: 0;
}

/* 流程页面配图 */
.process-media {
  margin: 40px 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-bg-alt);
}

.process-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 21 / 9;
}

.process-media figcaption {
  font-size: 13px;
  color: var(--color-text-secondary);
  padding: 8px 12px;
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border-light);
}

/* 周期说明 */
.timeline-note {
  background-color: var(--color-accent-light);
  border: 1px solid #FDE68A;
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  margin-bottom: 48px;
}

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

.note-text {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin: 0;
}

/* 下一步引导 */
.next-step-cta {
  background-color: var(--color-primary);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
  margin-bottom: 48px;
}

.next-step-cta .section-title {
  color: var(--color-white);
  margin-bottom: 8px;
}

.cta-text {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.8;
  margin-bottom: 24px;
}

.cta-text a {
  color: var(--color-white);
  text-decoration: underline;
  text-underline-offset: 4px;
  font-weight: 500;
}

.cta-text a:hover {
  color: var(--color-accent-light);
}

.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 12px 32px;
  min-height: 44px;
  transition: background-color var(--transition-base), transform var(--transition-base);
}

.cta-button:hover {
  background-color: var(--color-accent-light);
  transform: translateY(-1px);
}

/* ============================================================
   Pages —— 品质说明页
   ============================================================ */

.quality-overview {
  margin-bottom: 48px;
}

.overview-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.overview-card {
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.overview-card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-md);
}

.overview-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.overview-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
}

.overview-card a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
}

/* 详细标准列表 */
.quality-details {
  margin-bottom: 48px;
}

.standards-group {
  margin-bottom: 32px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.standards-group h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border-light);
}

.standards-list li {
  display: grid;
  grid-template-columns: 140px 1fr 1fr;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border-light);
  align-items: start;
}

.standards-list li:last-child {
  border-bottom: none;
}

.standard-item {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
}

.standard-requirement {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
}

.standard-note {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* 交付物清单 */
.deliverables {
  margin-bottom: 48px;
}

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

.deliverable-item {
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: border-color var(--transition-base);
}

.deliverable-item:hover {
  border-color: var(--color-primary-light);
}

.deliverable-item h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.deliverable-item p {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin: 0;
}

/* 服务承诺与验收 */
.acceptance {
  margin-bottom: 48px;
}

.acceptance-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

.promise-block,
.acceptance-steps {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.promise-block h3,
.acceptance-steps h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}

.promise-block li,
.acceptance-steps li {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  padding-left: 16px;
  position: relative;
  margin-bottom: 8px;
}

.promise-block li::before,
.acceptance-steps li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-primary);
}

.acceptance-steps ol {
  list-style: none;
  counter-reset: accept-step;
}

.acceptance-steps ol li {
  counter-increment: accept-step;
  padding-left: 36px;
}

.acceptance-steps ol li::before {
  content: counter(accept-step);
  position: absolute;
  left: 0;
  top: 4px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 12px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}

.acceptance-steps p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin: 12px 0 0;
}

.acceptance-cta {
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 24px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.acceptance-cta p {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin: 0;
}

.acceptance-cta a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-white);
  background-color: var(--color-primary);
  border-radius: var(--radius-md);
  padding: 10px 24px;
  min-height: 44px;
  transition: background-color var(--transition-base);
}

.acceptance-cta a:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
}

/* 品质页配图 */
.quality-media {
  margin: 40px 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-bg-alt);
}

.quality-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 21 / 8;
}

.quality-media figcaption {
  font-size: 13px;
  color: var(--color-text-secondary);
  padding: 8px 12px;
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border-light);
}

/* ============================================================
   Pages —— 合作方式页
   ============================================================ */

.page-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding) 64px;
  width: 100%;
}

.layout-shell.sidebar-left {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 40px;
  align-items: start;
}

.layout-shell.sidebar-left .page-aside {
  position: sticky;
  top: 88px;
}

.aside-card {
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 20px;
}

.aside-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border-light);
}

.aside-nav li {
  margin-bottom: 2px;
}

.aside-nav a {
  display: block;
  font-size: 14px;
  color: var(--color-text-secondary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-base), color var(--transition-base);
}

.aside-nav a:hover {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

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

.page-content .breadcrumb {
  padding-top: 16px;
  padding-bottom: 16px;
}

.page-content .page-header {
  margin-bottom: 32px;
}

.consult-section {
  margin-bottom: 48px;
  scroll-margin-top: 88px;
}

.consult-section .section-title {
  font-size: 20px;
  margin-bottom: 12px;
}

.content-media-inline {
  margin-bottom: 20px;
  max-width: 640px;
}

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

.section-desc {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}

.consult-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}

.consult-item {
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 16px;
}

.consult-item-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.consult-list li {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  padding-left: 14px;
  position: relative;
  margin-bottom: 4px;
}

.consult-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

.consult-link {
  font-size: 14px;
  margin: 0;
}

.consult-link a {
  font-weight: 500;
  color: var(--color-primary);
}

/* 合作启动步骤 */
.start-section {
  margin-bottom: 48px;
}

.start-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 20px;
}

.start-step {
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
}

.step-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.step-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin: 0;
}

.start-link {
  font-size: 14px;
  margin: 0;
}

.start-link a {
  font-weight: 500;
  color: var(--color-primary);
}

/* 站内反馈入口说明 */
.feedback-section {
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
}

.feedback-block {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 16px;
}

.feedback-item {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 16px;
}

.feedback-item-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
}

.feedback-item p {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* ============================================================
   Pages —— 常见问题页
   ============================================================ */

.faq-visual {
  margin-bottom: 32px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-bg-alt);
}

.faq-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 21 / 7;
}

.faq-visual figcaption {
  font-size: 13px;
  color: var(--color-text-secondary);
  padding: 8px 12px;
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border-light);
}

.faq-topic-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.tab-item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 8px 20px;
  min-height: 40px;
  cursor: pointer;
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

.tab-item:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.tab-item.is-active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
  font-weight: 600;
}

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

.faq-list .faq-item {
  max-width: 900px;
}

.faq-list .faq-item > p a {
  display: inline-block;
  margin-top: 8px;
}

/* 未解决引导 */
.faq-more-help {
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  margin-bottom: 40px;
}

.faq-more-help h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.faq-more-help p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin: 0;
}

.faq-more-help p a {
  font-weight: 500;
}

/* FAQ 相关栏目 */
.faq-related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border-light);
}

.faq-related-links a {
  display: inline-flex;
  align-items: center;
  font-size: 14px;
  color: var(--color-primary);
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  border-radius: 999px;
  padding: 6px 16px;
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

.faq-related-links a:hover {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary-light);
  color: var(--color-primary-dark);
}

/* ============================================================
   Pages —— 404 页
   ============================================================ */

.error-main {
  background-color: var(--color-bg);
}

.error-shell {
  max-width: 640px;
  margin: 0 auto;
  padding: 96px var(--container-padding) 120px;
  text-align: center;
}

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 16px;
}

.error-shell h1 {
  font-size: 24px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}

.error-desc {
  font-size: 16px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 32px;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  margin-bottom: 24px;
}

.error-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-white);
  background-color: var(--color-primary);
  border-radius: var(--radius-md);
  padding: 12px 28px;
  min-height: 44px;
  transition: background-color var(--transition-base), transform var(--transition-base);
}

.error-btn:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(-1px);
}

.error-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 12px 28px;
  min-height: 44px;
  transition: border-color var(--transition-base), color var(--transition-base);
}

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

.error-tip {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin: 0;
}

/* ============================================================
   Responsive —— 响应式
   ============================================================ */

/* 平板及以下 */
@media (max-width: 1024px) {
  .header-shell {
    gap: 16px;
  }

  .nav-list {
    gap: 20px;
  }

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

  .process-steps {
    grid-template-columns: repeat(2, 1fr);
  }

  .quality-cards {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .service-entry {
    grid-template-columns: 260px 1fr;
    gap: 24px;
  }

  .layout-shell.sidebar-left {
    grid-template-columns: 240px 1fr;
    gap: 28px;
  }

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

  .feedback-block {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .footer-shell {
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: 32px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

/* 移动端 */
@media (max-width: 768px) {
  :root {
    --container-padding: 20px;
  }

  .header-shell {
    height: 56px;
    gap: 12px;
  }

  .brand-name {
    font-size: 18px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    order: 3;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-md);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0;
    z-index: 99;
  }

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

  .nav-list li {
    border-bottom: 1px solid var(--color-border-light);
  }

  .nav-list li:last-child {
    border-bottom: none;
  }

  .nav-list a {
    display: block;
    padding: 14px 20px;
    font-size: 15px;
    border-bottom: none;
    border-left: 3px solid transparent;
  }

  .nav-list a:hover {
    border-bottom: none;
    border-left-color: var(--color-primary);
    background-color: var(--color-bg-alt);
  }

  .nav-list a.is-current {
    border-bottom: none;
    border-left-color: var(--color-primary);
    background-color: var(--color-bg-alt);
  }

  .header-cta {
    padding: 7px 14px;
    font-size: 13px;
  }

  /* 首页 hero */
  .hero-section {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 32px var(--container-padding) 48px;
  }

  .hero-copy h1 {
    font-size: 26px;
  }

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

  .btn-primary,
  .btn-secondary {
    width: 100%;
  }

  .hero-figure {
    order: 2;
  }

  /* 首页模块 */
  .section-block {
    padding: 48px var(--container-padding);
  }

  .service-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .process-steps {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .quality-cards {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .records-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .cooperation-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .faq-preview .faq-item {
    max-width: 100%;
  }

  /* 内页通用 */
  .inner-main {
    padding: 0 var(--container-padding) 48px;
  }

  .page-header {
    padding: 8px 0 24px;
    margin-bottom: 32px;
  }

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

  .page-description {
    font-size: 15px;
  }

  .breadcrumb {
    padding: 12px 0;
    font-size: 13px;
    flex-wrap: wrap;
  }

  /* 服务项目页 */
  .service-entry {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 24px 0;
  }

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

  .service-choice-guide {
    padding: 24px;
  }

  /* 案例记录页 */
  .records-list {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .filter-tabs {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
  }

  .filter-tab {
    flex-shrink: 0;
    white-space: nowrap;
  }

  .record-note {
    padding: 20px;
  }

  /* 制作流程页 */
  .timeline-steps {
    padding-left: 24px;
  }

  .timeline-item {
    padding-left: 16px;
  }

  .timeline-marker {
    left: -24px;
    width: 36px;
    height: 36px;
  }

  .step-number {
    font-size: 13px;
  }

  .step-content {
    padding: 18px;
  }

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

  .timeline-note {
    padding: 20px;
  }

  .next-step-cta {
    padding: 28px 20px;
  }

  /* 品质说明页 */
  .overview-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .standards-group {
    padding: 18px;
  }

  .standards-list li {
    grid-template-columns: 1fr;
    gap: 4px;
    padding: 10px 0;
  }

  .deliverables-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .acceptance-content {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .acceptance-cta {
    flex-direction: column;
    align-items: stretch;
    padding: 20px;
  }

  .acceptance-cta a {
    width: 100%;
  }

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

  /* 合作方式页 */
  .page-shell {
    padding: 0 var(--container-padding) 48px;
  }

  .layout-shell.sidebar-left {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .layout-shell.sidebar-left .page-aside {
    display: none;
  }

  .page-content .breadcrumb {
    padding-top: 12px;
  }

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

  .consult-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .start-steps {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .feedback-block {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .feedback-section {
    padding: 20px;
  }

  /* FAQ 页 */
  .faq-visual img {
    aspect-ratio: 16 / 9;
  }

  .faq-topic-tabs {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
  }

  .tab-item {
    flex-shrink: 0;
    white-space: nowrap;
  }

  .faq-more-help {
    padding: 20px;
  }

  /* 404 */
  .error-shell {
    padding: 64px var(--container-padding) 80px;
  }

  .error-code {
    font-size: 56px;
  }

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

  .error-btn,
  .error-link {
    width: 100%;
  }

  /* 页脚 */
  .footer-shell {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 40px var(--container-padding) 20px;
  }

  .footer-brand {
    grid-column: auto;
  }
}

/* 小屏手机 */
@media (max-width: 480px) {
  :root {
    --container-padding: 16px;
  }

  .header-cta {
    display: none;
  }

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

  .section-block {
    padding: 40px var(--container-padding);
  }

  .page-header {
    padding: 4px 0 20px;
  }

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

  .service-entry {
    padding: 20px 0;
  }

  .service-choice-guide {
    padding: 20px;
  }

  .next-step-cta {
    padding: 24px 16px;
  }

  .cta-button {
    width: 100%;
  }

  .timeline-steps {
    padding-left: 20px;
  }

  .timeline-marker {
    left: -20px;
    width: 32px;
    height: 32px;
  }

  .step-content {
    padding: 16px;
  }

  .acceptance-cta {
    padding: 16px;
  }
}

/* ============================================================
   动效增强（不影响初始可见性）
   ============================================================ */

@media (prefers-reduced-motion: no-preference) {
  .service-card,
  .quality-card,
  .record-card,
  .coop-card,
  .deliverable-item,
  .overview-card {
    transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
  }

  .service-card:hover,
  .quality-card:hover,
  .record-card:hover,
  .coop-card:hover,
  .deliverable-item:hover,
  .overview-card:hover {
    transform: translateY(-2px);
  }
}