/* ============================================================
   BASE — 基础变量、重置、字体、通用元素
   ============================================================ */
:root {
  --bg-paper: #F7F3E8;
  --green-field: #2F5D3A;
  --green-dark: #244A2E;
  --green-light: #3A7047;
  --wheat: #D4A843;
  --wheat-light: #E8C87A;
  --ink: #3A3A3A;
  --olive-border: #A8B78A;
  --gray-aux: #7A7A6A;
  --gray-light: #EDE9DC;
  --white: #FFFFFF;
  --font-serif: "Source Han Serif SC", "Noto Serif SC", "Songti SC", STSong, SimSun, serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "SF Mono", "Cascadia Mono", Consolas, monospace;
  --container-max: 1200px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 8px;
  --shadow-card: 0 1px 4px rgba(47, 93, 58, 0.08);
  --shadow-hover: 0 6px 18px rgba(47, 93, 58, 0.12);
  --transition-base: 0.2s 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-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background-color: var(--bg-paper);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

a:hover {
  color: var(--wheat);
}

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

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-serif);
  color: var(--green-field);
  line-height: 1.35;
  font-weight: 700;
}

p {
  margin-bottom: 0.75em;
}

/* ============================================================
   LAYOUT — 全站骨架容器、页头、页脚
   ============================================================ */

/* --- 站点根容器 --- */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--bg-paper);
}

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

/* --- 页头 --- */
.site-header {
  background-color: var(--bg-paper);
  border-bottom: 1px solid var(--olive-border);
  position: relative;
  z-index: 100;
}

.header-shell {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-link {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--green-field);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

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

.nav-list {
  display: flex;
  list-style: none;
  gap: 4px;
  margin: 0;
  padding: 0;
}

.nav-list li {
  margin: 0;
}

.nav-list a {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-base), color var(--transition-base);
  white-space: nowrap;
}

.nav-list a:hover {
  background-color: rgba(168, 183, 138, 0.18);
  color: var(--green-field);
}

.nav-list a.is-current {
  color: var(--green-field);
  font-weight: 600;
  background-color: rgba(168, 183, 138, 0.22);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 20px;
  background-color: var(--green-field);
  color: var(--white);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  transition: background-color var(--transition-base), color var(--transition-base);
}

.nav-cta:hover {
  background-color: var(--green-dark);
  color: var(--white);
}

/* --- 页脚 --- */
.site-footer {
  background-color: var(--green-dark);
  color: rgba(255, 255, 255, 0.85);
  margin-top: auto;
}

.footer-shell {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
}

.footer-brand {
  flex: 1 1 240px;
  min-width: 220px;
}

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

.footer-brand-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.65);
}

.footer-nav-group {
  flex: 1 1 160px;
  min-width: 140px;
}

.footer-nav-title {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--wheat);
  margin-bottom: 12px;
}

.footer-nav-group ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-nav-group li {
  margin-bottom: 8px;
}

.footer-nav-group a {
  color: rgba(255, 255, 255, 0.75);
  font-size: 14px;
  transition: color var(--transition-base);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding: 16px 24px;
  background-color: rgba(0, 0, 0, 0.12);
}

.footer-bottom p {
  max-width: var(--container-max);
  margin: 0 auto;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.6;
}

/* --- 内页公共骨架 --- */
.inner-main {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 24px 24px 64px;
  width: 100%;
}

/* 面包屑 */
.breadcrumb {
  font-size: 14px;
  color: var(--gray-aux);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

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

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

.breadcrumb-sep {
  color: var(--gray-aux);
  margin: 0 2px;
}

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

/* 页面标题区 */
.page-header {
  margin-bottom: 8px;
}

.page-title {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 700;
  color: var(--green-field);
  line-height: 1.3;
  margin: 0 0 8px;
}

.page-title-block,
.page-title-shell,
.page-title-area {
  margin-bottom: 24px;
}

.page-intro,
.page-title-summary,
.page-summary {
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  max-width: 760px;
}

/* ============================================================
   COMPONENTS — 通用组件：按钮、卡片、折叠、列表
   ============================================================ */

/* --- 按钮 --- */
.hero-btn,
.entry-btn,
.guide-btn,
.cta-button,
.error-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  cursor: pointer;
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
  text-decoration: none;
}

.hero-btn.primary,
.entry-btn.primary,
.guide-btn,
.cta-button,
.error-btn {
  background-color: var(--green-field);
  color: var(--white);
  border: 1px solid var(--green-field);
}

.hero-btn.primary:hover,
.entry-btn.primary:hover,
.guide-btn:hover,
.cta-button:hover,
.error-btn:hover {
  background-color: var(--green-dark);
  border-color: var(--green-dark);
  color: var(--white);
}

.hero-btn.secondary,
.entry-btn.secondary,
.guide-btn.secondary,
.cta-link {
  background-color: transparent;
  color: var(--green-field);
  border: 1px solid var(--green-field);
}

.hero-btn.secondary:hover,
.entry-btn.secondary:hover,
.guide-btn.secondary:hover,
.cta-link:hover {
  background-color: rgba(168, 183, 138, 0.18);
  color: var(--green-dark);
}

/* --- 区块标题 --- */
.section-heading {
  margin-bottom: 28px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--wheat);
  background-color: rgba(212, 168, 67, 0.12);
  padding: 2px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.section-heading h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--green-field);
  margin: 0;
}

.section-title {
  font-size: 26px;
  font-weight: 700;
  color: var(--green-field);
  margin-bottom: 20px;
}

.section-lead {
  font-size: 15px;
  color: var(--gray-aux);
  margin-bottom: 20px;
  max-width: 720px;
}

/* --- FAQ 折叠 --- */
.faq-item {
  border: 1px solid var(--olive-border);
  border-radius: var(--radius-md);
  background-color: var(--white);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--green-field);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: background-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(--wheat);
  flex-shrink: 0;
  transition: transform var(--transition-base);
}

.faq-item[open] summary {
  background-color: rgba(168, 183, 138, 0.1);
}

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

.faq-item p {
  padding: 0 20px 16px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}

/* --- 通用链接 --- */
.archive-link,
.faq-link,
.steps-link {
  display: inline-block;
  margin-top: 16px;
  font-size: 15px;
  font-weight: 600;
  color: var(--green-field);
  border-bottom: 1px solid var(--wheat);
  padding-bottom: 2px;
}

.archive-link:hover,
.faq-link:hover,
.steps-link:hover {
  color: var(--wheat);
  border-bottom-color: var(--green-field);
}

/* --- 图片容器 --- */
figure {
  margin: 0;
}

figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

figcaption {
  font-size: 13px;
  color: var(--gray-aux);
  padding: 8px 4px 0;
  line-height: 1.5;
}

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

/* --- 首屏上部：品牌定位 --- */
.hero-upper {
  background-color: var(--bg-paper);
  border-bottom: 1px solid var(--olive-border);
}

.hero-shell {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 56px 24px 48px;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.hero-archival {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--wheat);
  letter-spacing: 0.04em;
  margin-bottom: 12px;
  text-transform: uppercase;
}

.hero-copy h1 {
  font-size: 38px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--green-field);
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  max-width: 540px;
  margin-bottom: 24px;
}

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

.hero-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--olive-border);
  aspect-ratio: 4 / 3;
  background-color: var(--gray-light);
}

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

/* --- 首屏下部：服务观察摘要 --- */
.hero-lower {
  background-color: var(--white);
  border-bottom: 1px solid var(--olive-border);
}

.lower-shell {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 40px 24px;
}

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

.notes-preview-item {
  background-color: var(--bg-paper);
  border: 1px solid var(--olive-border);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

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

.notes-preview-item time {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gray-aux);
  display: block;
  margin-bottom: 8px;
}

.notes-preview-item h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.4;
}

.notes-preview-item h3 a {
  color: var(--green-field);
}

.notes-preview-item h3 a:hover {
  color: var(--wheat);
}

.notes-preview-item p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink);
  margin: 0;
}

/* --- 服务内容速览 --- */
.service-overview {
  background-color: var(--bg-paper);
}

.overview-shell {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 56px 24px;
}

.service-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 48px;
}

.service-item:last-child {
  margin-bottom: 0;
}

.service-item.reverse .service-figure {
  order: 2;
}

.service-item.reverse .service-text {
  order: 1;
}

.service-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--olive-border);
  aspect-ratio: 4 / 3;
  background-color: var(--gray-light);
}

.service-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.service-text h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}

.service-text p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  margin-bottom: 12px;
}

.service-text a {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--green-field);
  border-bottom: 1px solid var(--wheat);
  padding-bottom: 2px;
}

.service-text a:hover {
  color: var(--wheat);
  border-bottom-color: var(--green-field);
}

/* --- 服务批次档案 --- */
.batch-archive {
  background-color: var(--white);
  border-top: 1px solid var(--olive-border);
  border-bottom: 1px solid var(--olive-border);
}

.archive-shell {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 56px 24px;
}

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

.batch-card {
  background-color: var(--bg-paper);
  border: 1px solid var(--olive-border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

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

.batch-number {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--wheat);
  background-color: rgba(212, 168, 67, 0.1);
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
}

.batch-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}

.batch-scope,
.batch-status,
.batch-deliverable {
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink);
  margin-bottom: 6px;
}

.batch-status {
  color: var(--green-field);
  font-weight: 500;
}

.batch-deliverable {
  color: var(--gray-aux);
}

/* --- 合作流程四阶段（首页横排） --- */
.process-steps {
  background-color: var(--bg-paper);
}

.steps-shell {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 56px 24px;
}

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

.step-item {
  background-color: var(--white);
  border: 1px solid var(--olive-border);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.step-item:hover {
  border-color: var(--wheat);
  box-shadow: var(--shadow-hover);
}

.step-number {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  color: var(--wheat);
  margin-bottom: 8px;
}

.step-item h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.step-item p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
  margin: 0;
}

/* --- FAQ 精选（首页） --- */
.faq-preview {
  background-color: var(--white);
  border-top: 1px solid var(--olive-border);
  border-bottom: 1px solid var(--olive-border);
}

.faq-shell {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 56px 24px;
}

.faq-preview-list {
  max-width: 760px;
}

/* --- 开始合作入口（首页） --- */
.start-entry {
  background-color: var(--bg-paper);
}

.entry-shell {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 56px 24px;
  text-align: center;
}

.entry-shell h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 12px;
}

.entry-shell p {
  font-size: 15px;
  color: var(--gray-aux);
  max-width: 560px;
  margin: 0 auto 24px;
}

.entry-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* ============================================================
   PAGES — 服务内容页 service.html
   ============================================================ */

.service-detail-block {
  padding: 48px 0;
  border-bottom: 1px solid var(--olive-border);
}

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

.service-detail-alt {
  background-color: rgba(168, 183, 138, 0.06);
}

.service-detail-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.service-media {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--olive-border);
  aspect-ratio: 4 / 3;
  background-color: var(--gray-light);
}

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

.service-text .service-index {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--wheat);
  margin-bottom: 8px;
}

.service-text h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
}

.service-text h3 {
  font-size: 17px;
  font-weight: 600;
  margin: 16px 0 8px;
}

.service-text p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  margin-bottom: 12px;
}

.service-text a {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--green-field);
  border-bottom: 1px solid var(--wheat);
  padding-bottom: 2px;
}

/* 清单列表 */
.check-list,
.deliverable-list {
  list-style: none;
  padding: 0;
  margin: 0 0 16px;
}

.check-list li,
.deliverable-list li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.65;
  margin-bottom: 6px;
}

.check-list li::before,
.deliverable-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  background-color: var(--wheat);
  border-radius: 2px;
}

/* 工作流列表 */
.workflow-list {
  list-style: none;
  counter-reset: workflow;
  padding: 0;
  margin: 0 0 16px;
}

.workflow-list li {
  counter-increment: workflow;
  position: relative;
  padding-left: 32px;
  font-size: 14px;
  line-height: 1.65;
  margin-bottom: 10px;
}

.workflow-list li::before {
  content: counter(workflow);
  position: absolute;
  left: 0;
  top: 2px;
  width: 22px;
  height: 22px;
  background-color: var(--green-field);
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
}

/* 报告结构说明 */
.report-structure-block {
  padding: 48px 0;
  background-color: var(--white);
  border-top: 1px solid var(--olive-border);
  border-bottom: 1px solid var(--olive-border);
}

.report-structure-shell {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.report-structure-shell h2 {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 8px;
}

.report-structure-shell > p {
  font-size: 15px;
  color: var(--gray-aux);
  margin-bottom: 24px;
}

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

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

.structure-item h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.structure-item p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink);
  margin: 0;
}

/* 服务边界提示 */
.boundary-note {
  max-width: var(--container-max);
  margin: 32px auto 0;
  padding: 20px 24px;
  background-color: rgba(212, 168, 67, 0.08);
  border-left: 4px solid var(--wheat);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.boundary-note p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
  margin: 0;
}

/* ============================================================
   PAGES — 合作流程页 process.html
   ============================================================ */

.page-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

/* 垂直时间轴 */
.process-timeline {
  position: relative;
  padding-left: 0;
  margin: 0;
}

.process-stage-item {
  position: relative;
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 20px;
  padding-bottom: 36px;
}

.process-stage-item::before {
  content: "";
  position: absolute;
  left: 27px;
  top: 56px;
  bottom: 0;
  width: 2px;
  background-color: var(--olive-border);
}

.process-stage-item:last-child::before {
  display: none;
}

.stage-number {
  width: 56px;
  height: 56px;
  background-color: var(--green-field);
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  z-index: 1;
}

.stage-content {
  background-color: var(--white);
  border: 1px solid var(--olive-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.stage-content h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.stage-desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink);
  margin-bottom: 12px;
}

.stage-io {
  background-color: var(--bg-paper);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--gray-aux);
}

.io-line {
  display: block;
  margin-bottom: 4px;
}

.io-line:last-child {
  margin-bottom: 0;
}

/* 交付物清单 */
.deliverables-summary {
  padding-top: 8px;
}

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

.deliverable-card {
  background-color: var(--white);
  border: 1px solid var(--olive-border);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

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

.deliverable-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.deliverable-desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink);
  margin-bottom: 8px;
}

.deliverable-use {
  font-size: 13px;
  color: var(--gray-aux);
  line-height: 1.6;
}

.deliverable-use strong {
  color: var(--green-field);
  font-weight: 600;
}

/* 流程配图 */
.process-media-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--olive-border);
  aspect-ratio: 16 / 7;
  background-color: var(--gray-light);
  margin: 16px 0;
}

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

/* 开始合作引导 */
.start-guide {
  background-color: var(--white);
  border: 1px solid var(--olive-border);
  border-radius: var(--radius-md);
  padding: 32px;
}

.start-guide-content p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  margin-bottom: 20px;
}

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

/* 相关内容 */
.related-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 20px 0;
  border-top: 1px solid var(--olive-border);
  margin-top: 24px;
}

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

.related-links-item {
  font-size: 14px;
  color: var(--green-field);
  border-bottom: 1px solid var(--wheat);
  padding-bottom: 1px;
}

.related-links-item:hover {
  color: var(--wheat);
}

/* ============================================================
   PAGES — 常见问题页 faq.html
   ============================================================ */

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

.faq-answers-main {
  min-width: 0;
}

.faq-group {
  margin-bottom: 32px;
}

.faq-group h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--olive-border);
}

/* 侧栏目录 */
.faq-nav-aside {
  position: sticky;
  top: 24px;
}

.aside-inner {
  background-color: var(--white);
  border: 1px solid var(--olive-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.aside-title {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--green-field);
  margin-bottom: 12px;
}

.aside-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.aside-list li {
  margin-bottom: 8px;
}

.aside-list a {
  font-size: 14px;
  color: var(--ink);
  padding: 4px 0;
  display: inline-block;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-base), border-color var(--transition-base);
}

.aside-list a:hover {
  color: var(--green-field);
  border-bottom-color: var(--wheat);
}

/* FAQ 配图 */
.faq-image-section {
  margin: 32px 0 0;
  max-width: 760px;
}

.faq-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--olive-border);
  aspect-ratio: 16 / 7;
  background-color: var(--gray-light);
}

.faq-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ============================================================
   PAGES — 服务观察页 notes.html
   ============================================================ */

/* 归档导语 */
.archive-overview {
  margin-bottom: 32px;
}

.archive-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
  background-color: var(--white);
  border: 1px solid var(--olive-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.archive-intro-text p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  margin-bottom: 12px;
}

.archive-intro-text p:last-child {
  margin-bottom: 0;
}

.archive-intro-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--olive-border);
  aspect-ratio: 16 / 9;
  background-color: var(--gray-light);
}

.archive-intro-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 归档筛选 */
.archive-filter {
  margin-bottom: 32px;
}

.archive-filter-shell {
  background-color: var(--white);
  border: 1px solid var(--olive-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.archive-filter-title {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 600;
  color: var(--green-field);
  margin: 0;
  white-space: nowrap;
}

.archive-filter-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
}

.archive-filter-list a {
  display: inline-block;
  padding: 4px 14px;
  font-size: 14px;
  color: var(--ink);
  background-color: var(--bg-paper);
  border: 1px solid var(--olive-border);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

.archive-filter-list a:hover {
  background-color: var(--green-field);
  color: var(--white);
  border-color: var(--green-field);
}

/* 归档分组 */
.archive-groups {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.archive-group {
  background-color: var(--white);
  border: 1px solid var(--olive-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.archive-month {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 4px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--olive-border);
}

.archive-month-summary {
  font-size: 14px;
  color: var(--gray-aux);
  margin-bottom: 16px;
}

.archive-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--gray-light);
}

.archive-item:last-child {
  border-bottom: none;
}

.archive-item-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 6px;
}

.archive-item-meta time {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gray-aux);
}

.archive-item-tag {
  font-size: 12px;
  color: var(--wheat);
  background-color: rgba(212, 168, 67, 0.1);
  padding: 1px 8px;
  border-radius: var(--radius-sm);
}

.archive-item-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

.archive-item-title a {
  color: var(--green-field);
}

.archive-item-title a:hover {
  color: var(--wheat);
}

.archive-item-summary {
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink);
  margin-bottom: 6px;
}

.archive-item-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--green-field);
  border-bottom: 1px solid var(--wheat);
  padding-bottom: 1px;
}

.archive-item-link:hover {
  color: var(--wheat);
  border-bottom-color: var(--green-field);
}

/* 归档底部引导 */
.notes-footer-cta {
  margin-top: 40px;
}

.notes-cta-shell {
  background-color: var(--green-field);
  border-radius: var(--radius-md);
  padding: 32px;
  text-align: center;
}

.notes-cta-title {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 8px;
}

.notes-cta-text {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 20px;
}

.notes-cta-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

/* ============================================================
   PAGES — 开始合作页 start.html
   ============================================================ */

/* 双栏布局：侧栏在左，主内容在右 */
.page-layout.sidebar-left {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 40px;
  align-items: start;
}

.page-sidebar {
  position: sticky;
  top: 24px;
}

.sidebar-card {
  background-color: var(--white);
  border: 1px solid var(--olive-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.sidebar-title {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--green-field);
  margin-bottom: 12px;
}

.sidebar-nav {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar-nav li {
  margin-bottom: 8px;
}

.sidebar-nav a {
  font-size: 14px;
  color: var(--ink);
  padding: 4px 0;
  display: inline-block;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-base), border-color var(--transition-base);
}

.sidebar-nav a:hover {
  color: var(--green-field);
  border-bottom-color: var(--wheat);
}

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

/* 内容区块 */
.content-block {
  margin-bottom: 40px;
  background-color: var(--white);
  border: 1px solid var(--olive-border);
  border-radius: var(--radius-md);
  padding: 28px;
}

.section-index {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--wheat);
  margin-bottom: 4px;
}

.content-block .section-title {
  font-size: 22px;
  margin-bottom: 12px;
}

/* 资料准备清单 */
.prep-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.prep-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--gray-light);
}

.prep-item:last-child {
  border-bottom: none;
}

.prep-item-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--green-field);
  margin-bottom: 4px;
}

.prep-item-desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink);
  margin: 0;
}

/* 合作发起说明 */
.initiation-media {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--olive-border);
  aspect-ratio: 16 / 7;
  background-color: var(--gray-light);
  margin-bottom: 16px;
}

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

.initiation-text p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  margin-bottom: 12px;
}

.initiation-text p:last-child {
  margin-bottom: 0;
}

/* 合作前确认清单 */
.confirm-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.confirm-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--gray-light);
}

.confirm-item:last-child {
  border-bottom: none;
}

.confirm-item-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--green-field);
  margin-bottom: 4px;
  padding-left: 24px;
  position: relative;
}

.confirm-item-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 14px;
  height: 14px;
  border: 2px solid var(--wheat);
  border-radius: 3px;
  background-color: var(--white);
}

.confirm-item-desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink);
  margin: 0;
  padding-left: 24px;
}

/* 下一步引导 */
.next-step-guide {
  margin-top: 32px;
}

.next-step-card {
  background-color: var(--bg-paper);
  border: 1px solid var(--olive-border);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
}

.next-step-title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--green-field);
  margin-bottom: 8px;
}

.next-step-desc {
  font-size: 14px;
  color: var(--gray-aux);
  margin-bottom: 16px;
}

.next-step-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}

.text-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--green-field);
  border-bottom: 1px solid var(--wheat);
  padding-bottom: 2px;
}

.text-link:hover {
  color: var(--wheat);
  border-bottom-color: var(--green-field);
}

/* ============================================================
   PAGES — 404 页
   ============================================================ */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  flex: 1;
}

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

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

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

.error-desc {
  font-size: 15px;
  color: var(--gray-aux);
  margin-bottom: 24px;
}

/* ============================================================
   RESPONSIVE — 响应式断点
   ============================================================ */

/* --- 平板及以下：1024px --- */
@media (max-width: 1024px) {
  .hero-shell {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-figure {
    max-width: 640px;
  }

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

  .notes-preview-item:last-child {
    grid-column: 1 / -1;
  }

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

  .service-item.reverse .service-figure {
    order: 0;
  }

  .service-item.reverse .service-text {
    order: 0;
  }

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

  .batch-card:last-child {
    grid-column: 1 / -1;
  }

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

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

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

  .deliverable-card:last-child {
    grid-column: 1 / -1;
  }

  .faq-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .faq-nav-aside {
    position: static;
  }

  .aside-inner {
    padding: 16px;
  }

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

  .aside-list li {
    margin: 0;
  }

  .aside-list a {
    padding: 4px 12px;
    background-color: var(--bg-paper);
    border: 1px solid var(--olive-border);
    border-radius: var(--radius-sm);
  }

  .page-layout.sidebar-left {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .page-sidebar {
    position: static;
  }

  .sidebar-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }

  .sidebar-nav li {
    margin: 0;
  }

  .sidebar-nav a {
    padding: 4px 12px;
    background-color: var(--bg-paper);
    border: 1px solid var(--olive-border);
    border-radius: var(--radius-sm);
  }

  .archive-intro {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .service-detail-row {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

/* --- 手机：768px --- */
@media (max-width: 768px) {
  .header-shell {
    min-height: 60px;
    padding: 0 16px;
    gap: 12px;
  }

  .brand-name {
    font-size: 20px;
  }

  .nav-cta {
    padding: 6px 14px;
    font-size: 14px;
  }

  .nav-list {
    gap: 0;
  }

  .nav-list a {
    padding: 6px 10px;
    font-size: 14px;
  }

  .hero-shell {
    padding: 32px 16px 28px;
  }

  .hero-copy h1 {
    font-size: 28px;
  }

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

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

  .hero-btn {
    width: 100%;
  }

  .lower-shell {
    padding: 28px 16px;
  }

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

  .notes-preview-item:last-child {
    grid-column: auto;
  }

  .overview-shell,
  .archive-shell,
  .steps-shell,
  .faq-shell,
  .entry-shell {
    padding: 32px 16px;
  }

  .service-item {
    margin-bottom: 32px;
  }

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

  .batch-card:last-child {
    grid-column: auto;
  }

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

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

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

  .deliverable-card:last-child {
    grid-column: auto;
  }

  .footer-shell {
    padding: 32px 16px 24px;
    gap: 24px;
    flex-direction: column;
  }

  .footer-brand,
  .footer-nav-group {
    flex: 1 1 auto;
    min-width: 100%;
  }

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

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

  .process-stage-item {
    grid-template-columns: 44px 1fr;
    gap: 12px;
  }

  .stage-number {
    width: 44px;
    height: 44px;
    font-size: 16px;
  }

  .process-stage-item::before {
    left: 21px;
  }

  .stage-content {
    padding: 16px;
  }

  .start-guide {
    padding: 20px;
  }

  .guide-links {
    flex-direction: column;
    align-items: stretch;
  }

  .guide-btn {
    width: 100%;
  }

  .archive-filter-shell {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .archive-group {
    padding: 16px;
  }

  .archive-item-meta {
    flex-wrap: wrap;
  }

  .notes-cta-shell {
    padding: 24px 16px;
  }

  .notes-cta-links {
    flex-direction: column;
    align-items: stretch;
  }

  .cta-button,
  .cta-link {
    width: 100%;
  }

  .content-block {
    padding: 20px;
  }

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

  .entry-btn {
    width: 100%;
  }

  .related-links {
    flex-direction: column;
    align-items: flex-start;
  }

  .faq-group h2 {
    font-size: 20px;
  }

  .process-media-figure {
    aspect-ratio: 16 / 10;
  }

  .faq-figure {
    aspect-ratio: 16 / 10;
  }

  .initiation-media {
    aspect-ratio: 16 / 10;
  }
}

/* --- 小屏手机：390px --- */
@media (max-width: 390px) {
  .header-shell {
    padding: 0 12px;
  }

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

  .nav-list a {
    padding: 5px 8px;
    font-size: 13px;
  }

  .nav-cta {
    padding: 5px 10px;
    font-size: 13px;
  }

  .hero-shell,
  .lower-shell,
  .overview-shell,
  .archive-shell,
  .steps-shell,
  .faq-shell,
  .entry-shell {
    padding-left: 12px;
    padding-right: 12px;
  }

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

  .section-heading h2 {
    font-size: 24px;
  }

  .service-text h3 {
    font-size: 20px;
  }

  .batch-card {
    padding: 18px;
  }

  .step-item {
    padding: 16px;
  }

  .process-stage-item {
    grid-template-columns: 36px 1fr;
    gap: 10px;
  }

  .stage-number {
    width: 36px;
    height: 36px;
    font-size: 14px;
  }

  .process-stage-item::before {
    left: 17px;
  }

  .stage-content {
    padding: 14px;
  }

  .stage-io {
    padding: 10px 12px;
    font-size: 12px;
  }

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

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