/* ============================================================
   base — 全局基础变量、重置与字体
   ============================================================ */
:root {
  --color-accent: #C2541F;
  --color-status: #3E7C4F;
  --color-narrative: #2E5A88;
  --color-documentary: #C2541F;
  --color-demo: #3E7C4F;
  --color-bg: #FAF8F5;
  --color-text: #1D1A17;
  --color-text-secondary: #6B635C;
  --color-text-light: #8A8178;
  --color-border: #E5DED6;
  --color-card-bg: #FFFFFF;
  --color-header-bg: #FFFFFF;
  --color-footer-bg: #26211C;
  --color-footer-text: #B8B0A8;
  --color-footer-title: #F0ECE7;
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --container-width: 1140px;
  --reading-width: 720px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-card: 0 1px 3px rgba(29, 26, 23, 0.06);
  --shadow-hover: 0 4px 12px rgba(29, 26, 23, 0.08);
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

*,
*::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-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: #A34418;
}

ul,
ol {
  list-style-position: inside;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-text);
}

h1 {
  font-size: 32px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 18px;
}

p {
  margin-bottom: 0.5em;
}

strong {
  font-weight: 600;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   layout — 全站统一页头、页脚、主容器与面包屑骨架
   ============================================================ */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--color-bg);
}

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

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 16px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.brand-link:hover .brand-name {
  color: var(--color-accent);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  flex-shrink: 0;
}

.nav-toggle-icon {
  display: block;
  position: relative;
  width: 18px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 1px;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition-fast);
}

.nav-toggle-icon::before {
  top: -6px;
}

.nav-toggle-icon::after {
  top: 6px;
}

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

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

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

.site-nav {
  display: block;
}

.nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 4px;
}

.nav-list li {
  margin: 0;
}

.nav-list a {
  display: block;
  padding: 10px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  line-height: 1.5;
  white-space: nowrap;
}

.nav-list a:hover {
  color: var(--color-accent);
  background-color: rgba(194, 84, 31, 0.06);
}

.nav-list a.is-current {
  color: var(--color-accent);
  font-weight: 600;
  background-color: rgba(194, 84, 31, 0.08);
}

.site-main {
  flex: 1 0 auto;
  width: 100%;
}

.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 64px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
}

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

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

.breadcrumb-sep {
  color: var(--color-text-light);
}

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

.page-header {
  margin-bottom: 28px;
}

.page-title {
  font-size: 32px;
  line-height: 1.3;
  margin-bottom: 10px;
}

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

.site-footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 28px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-about .footer-brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-footer-title);
  margin-bottom: 12px;
}

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

.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-footer-title);
  margin-bottom: 14px;
}

.footer-links ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a {
  font-size: 14px;
  color: var(--color-footer-text);
  display: inline-block;
  padding: 2px 0;
}

.footer-links a:hover {
  color: #FFFFFF;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 16px 24px;
  text-align: center;
  font-size: 13px;
  color: rgba(184, 176, 168, 0.7);
}

/* 通用按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 44px;
}

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

.btn-primary:hover {
  background-color: #A34418;
  color: #FFFFFF;
}

.btn-secondary {
  background-color: transparent;
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-secondary:hover {
  background-color: rgba(194, 84, 31, 0.08);
  color: var(--color-accent);
}

/* ============================================================
   components — 通用组件：标签、折叠、配图条、相关入口
   ============================================================ */
.tag {
  display: inline-block;
  padding: 4px 12px;
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  line-height: 1.5;
  white-space: nowrap;
}

.tag-blue {
  background-color: rgba(46, 90, 136, 0.1);
  color: var(--color-narrative);
}

.tag-orange {
  background-color: rgba(194, 84, 31, 0.1);
  color: var(--color-documentary);
}

.tag-green {
  background-color: rgba(62, 124, 79, 0.1);
  color: var(--color-demo);
}

.tag-narrative {
  background-color: rgba(46, 90, 136, 0.1);
  color: var(--color-narrative);
}

.tag-documentary {
  background-color: rgba(194, 84, 31, 0.1);
  color: var(--color-documentary);
}

.tag-demo {
  background-color: rgba(62, 124, 79, 0.1);
  color: var(--color-demo);
}

/* 折叠问答 */
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-card-bg);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  min-height: 44px;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  font-weight: 400;
  color: var(--color-text-light);
  flex-shrink: 0;
  margin-left: 12px;
  transition: transform var(--transition-fast);
}

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

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

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

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

/* 配图条 */
.page-banner,
.page-cover,
.page-hero-image {
  margin: 0 0 40px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-card-bg);
  box-shadow: var(--shadow-card);
}

.page-banner img,
.page-cover img,
.page-hero-image img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.page-banner figcaption,
.page-cover figcaption,
.page-hero-image figcaption,
.page-figure figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--color-text-light);
  background-color: var(--color-card-bg);
}

/* 相关入口 */
.related-links {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.related-links-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-right: 8px;
}

.related-links-item {
  display: inline-block;
  margin: 4px 8px 4px 0;
  padding: 6px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
  background-color: rgba(194, 84, 31, 0.06);
  border-radius: var(--radius-sm);
  line-height: 1.6;
}

.related-links-item:hover {
  background-color: rgba(194, 84, 31, 0.12);
  color: var(--color-accent);
}

/* ============================================================
   pages — 首页
   ============================================================ */
.home-main {
  width: 100%;
}

/* 首屏三栏 */
.home-hero {
  background-color: var(--color-card-bg);
  border-bottom: 1px solid var(--color-border);
}

.hero-layout {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 56px 24px 64px;
  display: grid;
  grid-template-columns: 1.05fr 1.35fr 0.9fr;
  gap: 40px;
  align-items: stretch;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-copy h1 {
  font-size: 30px;
  line-height: 1.35;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.hero-media {
  display: flex;
  align-items: stretch;
}

.hero-figure {
  margin: 0;
  width: 100%;
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-bg);
  box-shadow: var(--shadow-card);
}

.hero-figure img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  flex: 1;
}

.hero-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-text-light);
  background-color: var(--color-card-bg);
}

.hero-status {
  display: flex;
}

.status-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px 22px;
  width: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.status-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

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

.status-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 4px;
}

.status-actions .btn {
  width: 100%;
}

/* 通用区块头 */
.section-header {
  margin-bottom: 32px;
}

.section-header h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

.section-header p {
  font-size: 15px;
  color: var(--color-text-secondary);
  max-width: var(--reading-width);
}

/* 服务范围总览 */
.services-overview {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 56px 24px 24px;
}

.service-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.service-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.service-item:hover {
  box-shadow: var(--shadow-hover);
  border-color: rgba(194, 84, 31, 0.3);
}

.service-index {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.6;
  flex-shrink: 0;
  padding-top: 2px;
}

.service-info h3 {
  font-size: 17px;
  margin-bottom: 4px;
}

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

/* 内容方向参考 */
.direction-showcase {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 24px;
}

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

.direction-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow var(--transition-fast);
}

.direction-card:hover {
  box-shadow: var(--shadow-hover);
}

.direction-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.direction-card h3 {
  font-size: 17px;
  padding: 16px 18px 4px;
}

.direction-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  padding: 0 18px 18px;
  margin-bottom: 0;
}

/* 制作流程入口 */
.process-preview {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 24px;
}

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

.step-item {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
}

.step-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.step-item p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
  flex: 1;
}

.step-item a {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-height: 44px;
}

.step-item a:hover {
  color: #A34418;
}

/* FAQ 摘选 */
.faq-teaser {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 24px;
}

.faq-more-link {
  margin-top: 16px;
}

.faq-more-link a {
  font-size: 15px;
  font-weight: 600;
}

/* 合作状态横幅 */
.cooperation-banner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px;
}

.banner-content {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.banner-content h2 {
  font-size: 20px;
}

.banner-content p {
  font-size: 15px;
  color: var(--color-text-secondary);
  max-width: 720px;
}

.banner-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

/* ============================================================
   pages — 内页通用
   ============================================================ */
.section-intro {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
  max-width: var(--reading-width);
}

/* ============================================================
   pages — 服务能力页
   ============================================================ */
.services-listing h2,
.service-boundary h2 {
  font-size: 24px;
  margin-bottom: 20px;
}

.services-listing .service-item {
  display: block;
  padding: 24px;
  margin-bottom: 16px;
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.services-listing .service-item h3 {
  font-size: 18px;
  margin-bottom: 12px;
  color: var(--color-accent);
}

.service-field {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 24px;
}

.service-field p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

.service-field strong {
  display: block;
  font-size: 14px;
  color: var(--color-text);
  margin-bottom: 2px;
}

.service-boundary {
  margin-top: 40px;
  padding: 24px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.boundary-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.boundary-list li {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-secondary);
  padding-left: 20px;
  position: relative;
}

.boundary-list li::before {
  content: "·";
  position: absolute;
  left: 4px;
  color: var(--color-accent);
  font-weight: 700;
}

/* ============================================================
   pages — 案例参考页
   ============================================================ */
.sticky-filter {
  position: sticky;
  top: 68px;
  z-index: 50;
  display: flex;
  gap: 8px;
  background-color: var(--color-bg);
  padding: 12px 0;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--color-border);
}

.filter-link {
  display: inline-block;
  padding: 8px 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  line-height: 1.5;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.filter-link:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.filter-link.is-current {
  background-color: var(--color-accent);
  color: #FFFFFF;
  border-color: var(--color-accent);
}

.form-section {
  margin-bottom: 48px;
  scroll-margin-top: 140px;
}

.section-heading {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

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

.section-tag {
  display: inline-block;
  padding: 3px 12px;
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  line-height: 1.5;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 24px;
  align-items: start;
}

.form-media {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--color-card-bg);
  box-shadow: var(--shadow-card);
}

.form-media img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.form-content {
  padding: 4px 0;
}

.form-subtitle {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
  margin-top: 16px;
}

.form-subtitle:first-child {
  margin-top: 0;
}

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

.form-content ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-content ul li {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  padding-left: 18px;
  position: relative;
}

.form-content ul li::before {
  content: "·";
  position: absolute;
  left: 4px;
  color: var(--color-accent);
  font-weight: 700;
}

.note-bar {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin: 40px 0 0;
}

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

/* ============================================================
   pages — 制作流程页
   ============================================================ */
.page-cover img {
  height: 240px;
}

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

.process-section > h2,
.preparation-section > h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

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

.process-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
}

.process-step {
  display: flex;
  flex-direction: column;
  flex: 1;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: var(--color-accent);
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 700;
  border-radius: 50%;
  margin-bottom: 12px;
}

.process-step h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

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

.step-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
  flex: 1;
}

.step-deliverable {
  font-size: 14px;
  color: var(--color-text-secondary);
  border-top: 1px solid var(--color-border);
  padding-top: 10px;
  margin-bottom: 0;
}

.step-deliverable strong {
  display: block;
  font-size: 13px;
  color: var(--color-text);
  margin-bottom: 2px;
}

.preparation-section {
  margin-bottom: 48px;
}

.preparation-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.preparation-list li {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.preparation-list h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

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

/* ============================================================
   pages — 创作方法页
   ============================================================ */
.section-block {
  margin-bottom: 48px;
}

.section-block > h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

.method-step-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.method-step-item {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.method-step-item h3 {
  font-size: 17px;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.step-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
}

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

.method-step-item p:last-child {
  margin-bottom: 0;
}

.division-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.division-col {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.division-col h3 {
  font-size: 17px;
  margin-bottom: 12px;
}

.division-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.division-col ul li {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  padding-left: 18px;
  position: relative;
}

.division-col ul li::before {
  content: "·";
  position: absolute;
  left: 4px;
  color: var(--color-accent);
  font-weight: 700;
}

/* ============================================================
   pages — 常见问题页
   ============================================================ */
.page-hero-media {
  margin: 0 0 32px;
}

.page-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-card-bg);
  box-shadow: var(--shadow-card);
}

.page-figure img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.faq-category-nav {
  position: sticky;
  top: 68px;
  z-index: 50;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  background-color: var(--color-bg);
  padding: 12px 0;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--color-border);
}

.faq-cat-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  line-height: 1.5;
  min-height: 44px;
}

.faq-cat-link:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.faq-group {
  margin-bottom: 40px;
  scroll-margin-top: 140px;
}

.faq-group-title {
  font-size: 20px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.faq-more-path {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-top: 32px;
}

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

.faq-more-path p {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

.faq-more-path a {
  font-weight: 600;
}

.faq-related-links {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
}

.related-title {
  font-size: 16px;
  margin-bottom: 12px;
}

.related-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.related-list a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-accent);
  display: inline-block;
  padding: 2px 0;
}

/* ============================================================
   pages — 反馈说明页
   ============================================================ */
.content-section {
  margin-bottom: 48px;
}

.content-section .section-title {
  font-size: 24px;
  margin-bottom: 16px;
}

.overview-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

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

.overview-card p:last-child {
  margin-bottom: 0;
}

.type-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.type-item {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.type-item h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.type-fit {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 10px;
}

.type-action {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

.type-action a {
  font-weight: 600;
  margin-right: 12px;
  display: inline-block;
  padding: 2px 0;
}

.checklist-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.checklist-item {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.checklist-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

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

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

.principle-item {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.principle-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

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

/* ============================================================
   pages — 404 页
   ============================================================ */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 48px 24px;
}

.error-content {
  text-align: center;
  max-width: 480px;
}

.error-code {
  font-size: 64px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.2;
  margin-bottom: 8px;
}

.error-content h1 {
  font-size: 24px;
  margin-bottom: 12px;
}

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

.error-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  font-size: 15px;
  font-weight: 600;
  color: #FFFFFF;
  background-color: var(--color-accent);
  border-radius: var(--radius-md);
  min-height: 44px;
}

.error-link:hover {
  background-color: #A34418;
  color: #FFFFFF;
}

/* ============================================================
   responsive — 响应式断点
   ============================================================ */
@media (max-width: 960px) {
  .hero-layout {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .hero-media {
    order: 3;
    grid-column: 1 / -1;
  }

  .hero-figure img {
    height: 260px;
  }

  .hero-status {
    grid-column: 2;
    grid-row: 1;
  }

  .hero-copy {
    grid-column: 1;
    grid-row: 1;
  }

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

  .direction-card {
    display: grid;
    grid-template-columns: 200px 1fr;
    align-items: center;
  }

  .direction-card img {
    height: 100%;
    min-height: 140px;
  }

  .direction-card h3 {
    padding-bottom: 0;
  }

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

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

  .form-grid {
    grid-template-columns: 1fr;
  }

  .form-media img {
    height: 200px;
  }

  .process-grid {
    grid-template-columns: 1fr 1fr;
  }

  .method-step-list {
    grid-template-columns: 1fr;
  }

  .division-columns {
    grid-template-columns: 1fr;
  }

  .service-field {
    grid-template-columns: 1fr;
  }

  .service-list {
    grid-template-columns: 1fr;
  }

  .checklist-grid {
    grid-template-columns: 1fr;
  }

  .principle-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .header-inner {
    flex-wrap: wrap;
    padding: 0 16px;
    min-height: 60px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    order: 3;
    width: 100%;
    flex-basis: 100%;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 8px 0 12px;
    gap: 0;
    border-top: 1px solid var(--color-border);
  }

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

  .nav-list li {
    width: 100%;
  }

  .nav-list a {
    padding: 12px 8px;
    font-size: 16px;
    border-radius: 0;
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .inner-main {
    padding: 24px 16px 48px;
  }

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

  .hero-layout {
    grid-template-columns: 1fr;
    padding: 32px 16px 40px;
    gap: 16px;
  }

  .hero-copy {
    grid-column: 1;
    grid-row: 1;
  }

  .hero-status {
    grid-column: 1;
    grid-row: 2;
  }

  .hero-media {
    grid-column: 1;
    grid-row: 3;
  }

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

  .hero-figure img {
    height: 200px;
  }

  .services-overview,
  .direction-showcase,
  .process-preview,
  .faq-teaser,
  .cooperation-banner {
    padding-left: 16px;
    padding-right: 16px;
  }

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

  .direction-card {
    display: block;
  }

  .direction-card img {
    height: 160px;
    min-height: 0;
  }

  .banner-content {
    padding: 24px 20px;
  }

  .banner-actions {
    flex-direction: column;
    width: 100%;
  }

  .banner-actions .btn {
    width: 100%;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 16px 20px;
  }

  .footer-bottom {
    padding: 12px 16px;
  }

  .page-banner img,
  .page-cover img,
  .page-hero-image img {
    height: 180px;
  }

  .sticky-filter {
    top: 60px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .sticky-filter::-webkit-scrollbar {
    display: none;
  }

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

  .faq-category-nav {
    top: 60px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    flex-wrap: nowrap;
  }

  .faq-category-nav::-webkit-scrollbar {
    display: none;
  }

  .faq-cat-link {
    white-space: nowrap;
    flex-shrink: 0;
  }

  .process-grid {
    grid-template-columns: 1fr;
  }

  .preparation-list {
    grid-template-columns: 1fr;
  }

  .service-field {
    grid-template-columns: 1fr;
  }

  .form-section {
    scroll-margin-top: 120px;
  }

  .faq-group {
    scroll-margin-top: 120px;
  }

  .error-code {
    font-size: 48px;
  }
}

@media (max-width: 480px) {
  .brand-name {
    font-size: 18px;
  }

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

  .hero-tags {
    flex-direction: column;
    align-items: flex-start;
  }

  .status-actions {
    flex-direction: row;
  }

  .status-actions .btn {
    flex: 1;
  }

  .section-header h2,
  .services-listing h2,
  .service-boundary h2,
  .process-section > h2,
  .preparation-section > h2,
  .section-block > h2,
  .content-section .section-title {
    font-size: 22px;
  }

  .service-item {
    flex-direction: column;
    gap: 8px;
  }

  .form-media img {
    height: 160px;
  }

  .overview-card,
  .type-item,
  .checklist-item,
  .principle-item {
    padding: 16px;
  }
}