/* ============================================================
   BASE — 全局基础样式
   ============================================================ */
:root {
  --color-white: #FFFFFF;
  --color-cream: #F5F1EA;
  --color-ink: #1A1A1A;
  --color-copper: #A3793C;
  --color-silver: #7A8B99;
  --color-cream-deep: #EDE7DC;
  --color-line: #E3DDD2;
  --color-text-soft: #5A5A5A;
  --font-serif: Georgia, "Songti SC", "SimSun", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  --container-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 8px;
  --shadow-card: 0 1px 3px rgba(26, 26, 26, 0.06), 0 4px 16px rgba(26, 26, 26, 0.05);
  --shadow-hover: 0 4px 12px rgba(26, 26, 26, 0.08), 0 10px 28px rgba(26, 26, 26, 0.08);
  --transition-fast: 0.2s ease;
  --transition-slow: 0.35s ease;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-ink);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover {
  color: #8A6530;
}

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

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

h1 {
  font-size: 32px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 18px;
}

p {
  margin-bottom: 1em;
}

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

/* ============================================================
   LAYOUT — 全站骨架
   ============================================================ */

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

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

.brand-logo {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-shrink: 0;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-ink);
  letter-spacing: 0.02em;
}

.brand-tagline {
  font-size: 13px;
  color: var(--color-silver);
  letter-spacing: 0.03em;
}

.primary-nav .nav-list {
  display: flex;
  list-style: none;
  gap: 4px;
}

.primary-nav .nav-link {
  display: inline-block;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--color-ink);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.primary-nav .nav-link:hover {
  background-color: var(--color-cream);
  color: var(--color-copper);
}

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

.consult-btn {
  display: inline-block;
  padding: 10px 22px;
  background-color: var(--color-copper);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
  flex-shrink: 0;
}

.consult-btn:hover {
  background-color: #8A6530;
  color: var(--color-white);
  box-shadow: var(--shadow-hover);
}

/* ---- 主容器 ---- */
.site-main {
  min-height: 60vh;
}

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

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

/* ---- 面包屑 ---- */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  padding: 20px 0 4px;
  font-size: 14px;
  color: var(--color-silver);
}

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

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

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

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

.breadcrumb ol {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
}

/* ---- 页面标题区（内页统一） ---- */
.page-title-area {
  padding: 28px 0 20px;
  border-bottom: 1px solid var(--color-line);
  margin-bottom: 32px;
}

.page-header {
  padding: 28px 0 4px;
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-ink);
  line-height: 1.35;
}

.page-lead {
  font-size: 16px;
  color: var(--color-text-soft);
  max-width: 720px;
  margin-top: 12px;
}

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

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 40px;
}

.footer-brand-name {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

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

.footer-nav ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav a {
  font-size: 15px;
  color: var(--color-text-soft);
}

.footer-nav a:hover {
  color: var(--color-copper);
}

.footer-consult p {
  font-size: 14px;
  color: var(--color-text-soft);
  margin-bottom: 12px;
}

.footer-consult a {
  display: inline-block;
  padding: 8px 18px;
  border: 1px solid var(--color-copper);
  color: var(--color-copper);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.footer-consult a:hover {
  background-color: var(--color-copper);
  color: var(--color-white);
}

.footer-bottom {
  border-top: 1px solid var(--color-line);
  padding: 20px 24px;
  text-align: center;
  font-size: 13px;
  color: var(--color-silver);
}

.footer-bottom p {
  margin-bottom: 0;
}

/* ---- 通用容器 ---- */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- 通用小节标题 ---- */
.section-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--color-ink);
}

.section-intro {
  font-size: 16px;
  color: var(--color-text-soft);
  max-width: 680px;
  margin-bottom: 28px;
}

/* ---- 通用文字链接 ---- */
.text-link {
  display: inline-block;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-copper);
  margin-top: 16px;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-fast);
}

.text-link:hover {
  border-bottom-color: var(--color-copper);
}

/* ---- 通用按钮 ---- */
.btn-primary {
  display: inline-block;
  padding: 14px 32px;
  background-color: var(--color-copper);
  color: var(--color-white);
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.btn-primary:hover {
  background-color: #8A6530;
  color: var(--color-white);
  box-shadow: var(--shadow-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-block;
  padding: 12px 28px;
  border: 1px solid var(--color-copper);
  color: var(--color-copper);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  background-color: transparent;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.btn-secondary:hover {
  background-color: var(--color-copper);
  color: var(--color-white);
}

/* ============================================================
   COMPONENTS — 通用组件
   ============================================================ */

/* ---- 内容媒体 figure ---- */
.content-media {
  margin: 0;
}

.content-media img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.content-media figcaption {
  font-size: 13px;
  color: var(--color-silver);
  padding: 10px 4px 0;
  line-height: 1.6;
}

/* ---- FAQ 折叠面板 ---- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--color-copper);
  box-shadow: var(--shadow-card);
}

.faq-item summary {
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 44px;
  color: var(--color-ink);
  font-family: var(--font-sans);
  transition: color var(--transition-fast);
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  font-weight: 400;
  color: var(--color-copper);
  transition: transform var(--transition-fast);
}

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

.faq-item[open] summary {
  color: var(--color-copper);
}

.faq-item p {
  padding: 0 20px 18px;
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.75;
  margin-bottom: 0;
}

.faq-answer p {
  padding: 0 20px 18px;
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.75;
  margin-bottom: 0;
}

.faq-answer p + p {
  padding-top: 0;
  margin-top: -8px;
}

/* ---- 卡片通用 ---- */
.card-icon,
.category-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: var(--color-cream);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--color-copper);
  font-size: 22px;
  font-weight: 700;
  font-family: var(--font-serif);
}

.card-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-copper);
  margin-top: 12px;
  transition: color var(--transition-fast);
}

.card-link:hover {
  color: #8A6530;
}

/* ---- 相关链接 ---- */
.related-links {
  max-width: var(--container-width);
  margin: 40px auto 0;
  padding: 24px 24px 0;
  border-top: 1px solid var(--color-line);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: 14px;
}

.related-links-label {
  color: var(--color-silver);
  font-weight: 600;
}

.related-links-item {
  color: var(--color-copper);
  padding: 4px 0;
}

.related-links-item:hover {
  color: #8A6530;
}

/* ============================================================
   PAGES — 首页
   ============================================================ */

/* ---- Hero 首屏 ---- */
.hero-section {
  background-color: var(--color-cream);
  border-bottom: 1px solid var(--color-line);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  padding-top: 56px;
  padding-bottom: 56px;
}

.hero-copy {
  max-width: 560px;
}

.hero-copy h1 {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
  color: var(--color-ink);
}

.hero-lead {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-copper);
  margin-bottom: 12px;
  font-family: var(--font-serif);
}

.hero-desc {
  font-size: 16px;
  color: var(--color-text-soft);
  margin-bottom: 24px;
  line-height: 1.8;
}

.hero-methods {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 28px 28px 24px;
  box-shadow: var(--shadow-card);
}

.hero-methods .section-title {
  font-size: 18px;
  margin-bottom: 16px;
}

.method-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.method-list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 15px;
  color: var(--color-ink);
  line-height: 1.6;
}

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

.method-index {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  color: var(--color-copper);
  flex-shrink: 0;
  min-width: 24px;
}

.content-media-primary {
  margin-top: 0;
  grid-column: 1 / -1;
}

.content-media-primary img {
  width: 100%;
  max-height: 380px;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.content-media-primary figcaption {
  text-align: center;
}

/* ---- 服务矩阵 ---- */
.services-grid-section {
  padding: 64px 0;
  background-color: var(--color-white);
}

.services-grid-section .section-title,
.services-grid-section .section-intro {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 8px;
}

.service-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: box-shadow var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast);
}

.service-card:hover {
  border-color: var(--color-copper);
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.service-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

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

/* ---- 交错媒体模块 ---- */
.media-alternating-section {
  padding: 64px 0;
  background-color: var(--color-cream);
}

.media-alternating-section .section-title,
.media-alternating-section .section-intro {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.media-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 32px 0;
}

.media-block.is-reversed .media-figure {
  order: 2;
}

.media-block.is-reversed .media-content {
  order: 1;
}

.media-figure {
  margin: 0;
}

.media-figure img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
}

.media-content h3 {
  font-size: 22px;
  margin-bottom: 12px;
}

.media-content p {
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.8;
  margin-bottom: 12px;
}

.media-content .text-link {
  margin-top: 8px;
}

/* ---- 合作流程预览 ---- */
.process-preview-section {
  padding: 64px 0;
  background-color: var(--color-white);
}

.process-preview-section .section-title,
.process-preview-section .section-intro {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.step-item {
  background-color: var(--color-cream);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  border-top: 3px solid var(--color-copper);
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.step-item:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.step-num {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-copper);
  margin-bottom: 8px;
}

.step-item h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.step-item p {
  font-size: 13px;
  color: var(--color-text-soft);
  line-height: 1.65;
  margin-bottom: 0;
}

.process-preview-section .btn-secondary {
  display: block;
  margin: 0 auto;
  text-align: center;
  width: fit-content;
}

/* ---- 方案模板预览 ---- */
.templates-preview-section {
  padding: 64px 0;
  background-color: var(--color-cream);
}

.templates-preview-section .section-title,
.templates-preview-section .section-intro {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.template-card-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.template-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.template-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.template-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.template-card p {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.7;
  margin-bottom: 10px;
}

.template-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-copper);
  background-color: var(--color-cream);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 8px;
}

.templates-preview-section > .container > .text-link {
  display: block;
  text-align: center;
}

/* ---- FAQ 预览 ---- */
.faq-preview-section {
  padding: 64px 0;
  background-color: var(--color-white);
}

.faq-preview-section .container {
  max-width: 800px;
}

.faq-preview-section .section-title {
  text-align: center;
}

.faq-preview-section > .container > .text-link {
  display: block;
  text-align: center;
}

/* ---- 服务原则 ---- */
.principles-section {
  padding: 64px 0;
  background-color: var(--color-cream);
  border-top: 1px solid var(--color-line);
}

.principles-section .section-title {
  text-align: center;
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 960px;
  margin: 0 auto;
}

.principle-item {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  border: 1px solid var(--color-line);
  transition: box-shadow var(--transition-fast);
}

.principle-item:hover {
  box-shadow: var(--shadow-hover);
}

.principle-item h3 {
  font-size: 17px;
  margin-bottom: 8px;
  color: var(--color-copper);
}

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

.principles-section > .container > .text-link {
  display: block;
  text-align: center;
  margin-top: 28px;
}

/* ============================================================
   PAGES — 服务能力（services.html）
   ============================================================ */

.layout-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 48px;
  align-items: start;
}

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

.sidebar-area {
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: sticky;
  top: 100px;
}

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

.sidebar-card h2 {
  font-size: 18px;
  margin-bottom: 12px;
}

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

.boundary-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.boundary-list li {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.65;
  padding-left: 20px;
  position: relative;
}

.boundary-list li::before {
  content: "·";
  position: absolute;
  left: 4px;
  color: var(--color-copper);
  font-weight: 700;
  font-size: 18px;
}

.sidebar-card.consult-card {
  background-color: var(--color-white);
  border-color: var(--color-copper);
  box-shadow: var(--shadow-card);
}

.sidebar-link {
  display: inline-block;
  padding: 10px 24px;
  background-color: var(--color-copper);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.sidebar-link:hover {
  background-color: #8A6530;
  color: var(--color-white);
}

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

.factor-list li {
  font-size: 14px;
  color: var(--color-text-soft);
  padding-left: 20px;
  position: relative;
  line-height: 1.65;
}

.factor-list li::before {
  content: "·";
  position: absolute;
  left: 4px;
  color: var(--color-copper);
  font-weight: 700;
  font-size: 18px;
}

/* ---- 服务详情块 ---- */
.service-detail-block {
  padding: 36px 0;
  border-bottom: 1px solid var(--color-line);
}

.service-detail-block:first-of-type {
  padding-top: 8px;
}

.service-detail-block:last-of-type {
  border-bottom: none;
}

.service-detail-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 16px;
}

.service-index {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-copper);
  flex-shrink: 0;
}

.service-detail-head h2 {
  font-size: 24px;
  margin-bottom: 0;
}

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

.service-detail-block h3 {
  font-size: 16px;
  margin-bottom: 8px;
  margin-top: 20px;
}

.service-detail-block h3:first-of-type {
  margin-top: 0;
}

.service-detail-block p {
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.8;
  margin-bottom: 12px;
}

.deliverable-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.deliverable-list li {
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.7;
  padding-left: 24px;
  position: relative;
}

.deliverable-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-copper);
  font-weight: 700;
}

.service-media-block {
  margin-bottom: 20px;
}

.service-figure {
  margin: 0;
}

.service-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* ============================================================
   PAGES — 合作流程（process.html）
   ============================================================ */

.content-media-inline {
  margin-top: 16px;
}

.content-media-inline img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* ---- 流程时间轴 ---- */
.process-timeline-section {
  padding: 40px 0 8px;
}

.process-timeline {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-bottom: 40px;
}

.timeline-step {
  background-color: var(--color-cream);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  text-align: center;
  border-bottom: 3px solid var(--color-copper);
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.timeline-step:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.timeline-step .step-number {
  display: block;
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-copper);
  margin-bottom: 4px;
}

.timeline-step .step-name {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink);
  line-height: 1.5;
}

/* ---- 阶段详情 ---- */
.stage-details-section {
  padding: 24px 0;
}

.stage-block {
  padding: 32px 0;
  border-bottom: 1px solid var(--color-line);
}

.stage-block:last-of-type {
  border-bottom: none;
}

.stage-block h2 {
  font-size: 22px;
  margin-bottom: 8px;
}

.stage-goal {
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.8;
  margin-bottom: 20px;
}

.stage-content {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.stage-info {
  background-color: var(--color-cream);
  border-radius: var(--radius-md);
  padding: 20px;
}

.stage-info h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-copper);
  margin-bottom: 8px;
}

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

/* ---- 客户配合要点 ---- */
.client-tasks-section {
  padding: 40px 0;
}

.client-tasks-section h2 {
  margin-bottom: 8px;
}

.task-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.task-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: box-shadow var(--transition-fast);
}

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

.task-card h3 {
  font-size: 16px;
  color: var(--color-copper);
  margin-bottom: 8px;
}

.task-card p {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.7;
  margin-bottom: 0;
}

/* ---- 时间节奏 ---- */
.time-rhythm-section {
  padding: 40px 0;
  background-color: var(--color-cream);
  border-radius: var(--radius-md);
  margin: 16px 0;
  padding: 32px 32px;
}

.time-rhythm-section h2 {
  margin-bottom: 12px;
}

.time-rhythm-section p {
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.8;
  margin-bottom: 12px;
}

/* ---- 咨询引导 ---- */
.consult-guide-section {
  padding: 40px 0 16px;
}

.consult-guide-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-copper);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-card);
}

.consult-guide-card h2 {
  margin-bottom: 12px;
}

.consult-guide-card p {
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.8;
  margin-bottom: 20px;
}

.guide-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.guide-links a {
  display: inline-block;
  padding: 10px 24px;
  border: 1px solid var(--color-copper);
  color: var(--color-copper);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.guide-links a:hover {
  background-color: var(--color-copper);
  color: var(--color-white);
}

/* ============================================================
   PAGES — 方案模板（templates.html）
   ============================================================ */

.page-layout {
  max-width: var(--container-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 48px;
  padding: 0 24px 64px;
  align-items: start;
}

.page-layout .inner-main {
  max-width: none;
  padding: 0;
  margin: 0;
}

.template-sidebar {
  position: sticky;
  top: 100px;
}

.sidebar-inner {
  background-color: var(--color-cream);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px;
}

.sidebar-inner h2 {
  font-size: 18px;
  margin-bottom: 12px;
}

.sidebar-inner p {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.7;
  margin-bottom: 12px;
}

.sidebar-inner a {
  font-size: 14px;
  color: var(--color-copper);
  font-weight: 600;
}

/* ---- 用途分类 ---- */
.usage-categories {
  padding: 24px 0;
}

.usage-categories h2 {
  margin-bottom: 20px;
}

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

.category-card {
  background-color: var(--color-cream);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--color-line);
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.category-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.category-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.category-card p {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.7;
  margin-bottom: 0;
}

/* ---- 模板列表 ---- */
.template-list-section {
  padding: 40px 0;
}

.template-list-section h2 {
  margin-bottom: 20px;
}

.template-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.template-item {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: box-shadow var(--transition-fast);
}

.template-item:hover {
  box-shadow: var(--shadow-hover);
}

.template-figure {
  margin: 0;
}

.template-figure img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.template-content h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.template-scope {
  font-size: 13px;
  color: var(--color-copper);
  font-weight: 600;
  margin-bottom: 8px;
}

.template-content p {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.7;
  margin-bottom: 8px;
}

/* ---- 更新记录 ---- */
.update-record {
  padding: 40px 0;
}

.update-record h2 {
  margin-bottom: 20px;
}

.update-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.update-item {
  background-color: var(--color-cream);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  border-left: 3px solid var(--color-copper);
}

.update-item h3 {
  font-size: 15px;
  color: var(--color-copper);
  margin-bottom: 6px;
}

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

.submit-note {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-top: 20px;
}

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

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

/* ============================================================
   PAGES — 常见问题（faq.html）
   ============================================================ */

.faq-title-area {
  border-bottom: none;
  padding-bottom: 8px;
}

.title-area-inner p {
  font-size: 16px;
  color: var(--color-text-soft);
  line-height: 1.8;
  max-width: 720px;
}

/* ---- 引导媒体区 ---- */
.faq-intro-media {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  padding: 32px 0;
  border-bottom: 1px solid var(--color-line);
  margin-bottom: 32px;
}

.faq-media-figure {
  margin: 0;
}

.faq-media-figure img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.faq-intro-text h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.faq-intro-text p {
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.8;
  margin-bottom: 0;
}

/* ---- FAQ 分类列表 ---- */
.faq-list-section {
  padding: 16px 0;
}

.faq-category-block {
  margin-bottom: 40px;
}

.faq-category-block h2 {
  font-size: 20px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
}

.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ---- 咨询引导 ---- */
.consult-guide {
  padding: 40px 0;
}

.consult-guide-inner {
  background-color: var(--color-cream);
  border-radius: var(--radius-md);
  padding: 32px;
  text-align: center;
  border: 1px solid var(--color-line);
}

.consult-guide-inner h2 {
  margin-bottom: 12px;
}

.consult-guide-inner p {
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.8;
  margin-bottom: 20px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.consult-link-btn {
  display: inline-block;
  padding: 12px 32px;
  background-color: var(--color-copper);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.consult-link-btn:hover {
  background-color: #8A6530;
  color: var(--color-white);
  box-shadow: var(--shadow-hover);
}

/* ============================================================
   PAGES — 关于我们（about.html）
   ============================================================ */

/* ---- 定位区 ---- */
.positioning-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 40px 0;
}

.positioning-text h2 {
  font-size: 24px;
  margin-bottom: 16px;
}

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

.positioning-image {
  margin: 0;
}

.positioning-image img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
}

.positioning-image figcaption {
  font-size: 13px;
  color: var(--color-silver);
  padding: 10px 4px 0;
  line-height: 1.6;
}

/* ---- 原则区 ---- */
.principles-block {
  padding: 40px 0;
  background-color: var(--color-cream);
  border-radius: var(--radius-md);
  padding: 40px 32px;
  margin: 16px 0;
}

.principles-block h2 {
  margin-bottom: 8px;
}

.section-lead {
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.8;
  margin-bottom: 24px;
}

.principle-card {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--color-line);
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.principle-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.principle-card h3 {
  font-size: 16px;
  color: var(--color-copper);
  margin-bottom: 8px;
}

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

/* ---- 服务边界 ---- */
.boundary-block {
  padding: 40px 0;
}

.boundary-block h2 {
  margin-bottom: 12px;
}

.boundary-block > p {
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.8;
  margin-bottom: 20px;
}

.boundary-note {
  font-size: 14px;
  color: var(--color-silver);
  line-height: 1.7;
  margin-top: 20px;
  padding: 16px 20px;
  background-color: var(--color-cream);
  border-radius: var(--radius-sm);
}

/* ---- 底部 CTA ---- */
.about-cta {
  padding: 40px 0;
  text-align: center;
  background-color: var(--color-cream);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-line);
}

.about-cta h2 {
  margin-bottom: 12px;
}

.about-cta p {
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.8;
  margin-bottom: 20px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.cta-button {
  display: inline-block;
  padding: 12px 32px;
  background-color: var(--color-copper);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.cta-button:hover {
  background-color: #8A6530;
  color: var(--color-white);
  box-shadow: var(--shadow-hover);
}

/* ============================================================
   PAGES — 404 页面
   ============================================================ */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  background-color: var(--color-cream);
}

.error-wrap {
  text-align: center;
  max-width: 520px;
  padding: 48px 32px;
}

.error-code {
  font-family: var(--font-serif);
  font-size: 72px;
  font-weight: 700;
  color: var(--color-copper);
  line-height: 1.2;
  margin-bottom: 8px;
}

.error-wrap h1 {
  font-size: 28px;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.8;
  margin-bottom: 24px;
}

.error-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.error-home-btn {
  display: inline-block;
  padding: 12px 28px;
  background-color: var(--color-copper);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.error-home-btn:hover {
  background-color: #8A6530;
  color: var(--color-white);
}

.error-service-link {
  display: inline-block;
  padding: 12px 28px;
  border: 1px solid var(--color-copper);
  color: var(--color-copper);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.error-service-link:hover {
  background-color: var(--color-copper);
  color: var(--color-white);
}

/* ============================================================
   RESPONSIVE — 响应式
   ============================================================ */

/* ---- 平板（≤1024px） ---- */
@media (max-width: 1024px) {
  .header-inner {
    padding: 14px 20px;
    gap: 16px;
  }

  .brand-tagline {
    display: none;
  }

  .primary-nav .nav-link {
    padding: 8px 10px;
    font-size: 14px;
  }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .process-steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .process-timeline {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }

  .layout-shell {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 32px;
  }

  .page-layout {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 32px;
  }

  .template-item {
    grid-template-columns: 220px 1fr;
    gap: 16px;
  }

  .stage-content {
    grid-template-columns: 1fr 1fr;
  }

  .stage-info:last-child {
    grid-column: 1 / -1;
  }
}

/* ---- 手机（≤768px） ---- */
@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  h1 {
    font-size: 28px;
  }

  h2 {
    font-size: 20px;
  }

  h3 {
    font-size: 16px;
  }

  .header-inner {
    flex-wrap: wrap;
    padding: 12px 16px;
    gap: 12px;
  }

  .brand-logo {
    order: 1;
  }

  .consult-btn {
    order: 2;
    margin-left: auto;
    padding: 8px 16px;
    font-size: 14px;
  }

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

  .primary-nav .nav-list {
    display: none;
    flex-direction: column;
    gap: 0;
    width: 100%;
    padding: 8px 0;
    border-top: 1px solid var(--color-line);
  }

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

  .primary-nav .nav-link {
    display: block;
    padding: 12px 8px;
    font-size: 15px;
    border-radius: 0;
    border-bottom: 1px solid var(--color-line);
  }

  .primary-nav .nav-link:last-child {
    border-bottom: none;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: none;
    border: 1px solid var(--color-line);
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--color-ink);
    font-size: 18px;
    order: 2;
  }

  .inner-main {
    padding: 0 16px 48px;
  }

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

  .page-title-area {
    padding: 20px 0 16px;
    margin-bottom: 24px;
  }

  .breadcrumb {
    padding: 16px 0 0;
    font-size: 13px;
  }

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

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

  .container {
    padding: 0 16px;
  }

  /* 首页 Hero */
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 0;
  }

  .hero-copy h1 {
    font-size: 30px;
  }

  .hero-methods {
    padding: 20px;
  }

  .content-media-primary img {
    max-height: 220px;
  }

  /* 首页服务矩阵 */
  .services-grid-section {
    padding: 40px 0;
  }

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

  .service-card {
    padding: 20px;
  }

  /* 首页交错媒体 */
  .media-alternating-section {
    padding: 40px 0;
  }

  .media-block {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 20px 0;
  }

  .media-block.is-reversed .media-figure {
    order: 1;
  }

  .media-block.is-reversed .media-content {
    order: 2;
  }

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

  /* 首页流程预览 */
  .process-preview-section {
    padding: 40px 0;
  }

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

  .step-item {
    padding: 16px;
  }

  /* 首页模板 */
  .templates-preview-section {
    padding: 40px 0;
  }

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

  .template-card {
    padding: 20px;
  }

  /* 首页 FAQ */
  .faq-preview-section {
    padding: 40px 0;
  }

  /* 首页原则 */
  .principles-section {
    padding: 40px 0;
  }

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

  .principle-item {
    padding: 20px;
  }

  /* 服务页 */
  .layout-shell {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .sidebar-area {
    position: static;
  }

  .service-detail-block {
    padding: 24px 0;
  }

  .service-detail-head {
    gap: 10px;
  }

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

  /* 流程页 */
  .process-timeline {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .timeline-step {
    padding: 16px 12px;
  }

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

  .stage-info:last-child {
    grid-column: auto;
  }

  .stage-block {
    padding: 24px 0;
  }

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

  .time-rhythm-section {
    padding: 24px 20px;
  }

  .consult-guide-card {
    padding: 24px 20px;
  }

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

  .guide-links a {
    text-align: center;
  }

  /* 模板页 */
  .page-layout {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 0 16px 48px;
  }

  .template-sidebar {
    position: static;
    order: 2;
  }

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

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

  .template-figure img {
    height: 160px;
  }

  .update-item {
    padding: 16px;
  }

  /* FAQ 页 */
  .faq-intro-media {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 24px 0;
  }

  .faq-media-figure img {
    height: 180px;
  }

  .faq-category-block h2 {
    font-size: 18px;
  }

  .consult-guide-inner {
    padding: 24px 20px;
  }

  /* 关于页 */
  .positioning-block {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 24px 0;
  }

  .positioning-image img {
    height: 200px;
  }

  .principles-block {
    padding: 24px 20px;
  }

  .boundary-block {
    padding: 24px 0;
  }

  .about-cta {
    padding: 24px 20px;
  }

  /* 404 */
  .error-code {
    font-size: 56px;
  }

  .error-actions {
    flex-direction: column;
    gap: 12px;
  }

  .error-home-btn,
  .error-service-link {
    display: block;
    width: 100%;
    text-align: center;
  }

  /* FAQ 折叠面板触达 */
  .faq-item summary {
    padding: 14px 44px 14px 16px;
    font-size: 15px;
  }

  .faq-item p,
  .faq-answer p {
    padding: 0 16px 16px;
    font-size: 14px;
  }

  /* 相关链接 */
  .related-links {
    padding: 20px 16px 0;
    gap: 8px 16px;
  }
}

/* ---- 小屏手机（≤390px） ---- */
@media (max-width: 390px) {
  .header-inner {
    padding: 10px 12px;
  }

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

  .consult-btn {
    padding: 8px 12px;
    font-size: 13px;
  }

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

  .hero-lead {
    font-size: 16px;
  }

  .hero-desc {
    font-size: 15px;
  }

  .btn-primary {
    display: block;
    text-align: center;
    padding: 12px 20px;
    font-size: 15px;
  }

  .btn-secondary {
    display: block;
    width: 100%;
    text-align: center;
  }

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

  .stage-info {
    padding: 16px;
  }

  .service-detail-head h2 {
    font-size: 20px;
  }

  .service-index {
    font-size: 16px;
  }

  .deliverable-list li {
    font-size: 14px;
  }

  .sidebar-card {
    padding: 20px 16px;
  }

  .template-card h3 {
    font-size: 16px;
  }

  .faq-item summary {
    font-size: 14px;
  }

  .footer-consult a {
    display: block;
    text-align: center;
  }
}

/* ---- 桌面端导航切换按钮隐藏 ---- */
.nav-toggle {
  display: none;
}