/* ============================================================
   base — 全站基础样式
   ============================================================ */

:root {
  --bg: #F5F1E8;
  --bg-soft: #EDE8DC;
  --primary: #2F4A3E;
  --primary-dark: #24382F;
  --accent: #A65E3A;
  --text: #3A3A36;
  --text-light: #6B6B63;
  --border: #E8E2D6;
  --white: #FFFFFF;
  --font-serif: "Songti SC", "STSong", "SimSun", "Noto Serif SC", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --container: 1200px;
  --content-max: 860px;
  --radius: 4px;
  --radius-card: 6px;
  --transition: 0.25s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul,
ol {
  list-style: none;
}

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

h1 {
  font-size: 2.25rem;
}

h2 {
  font-size: 1.6rem;
}

h3 {
  font-size: 1.15rem;
}

p {
  margin-bottom: 1rem;
}

/* ============================================================
   layout — 全站骨架与容器
   ============================================================ */

.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

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

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

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.02em;
}

.main-nav ul {
  display: flex;
  gap: 4px;
}

.main-nav a {
  display: block;
  padding: 8px 16px;
  font-size: 0.92rem;
  color: var(--text);
  border-radius: var(--radius);
  position: relative;
}

.main-nav a:hover {
  color: var(--primary);
  background-color: var(--bg-soft);
}

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

.main-nav a.is-current::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 2px;
  background-color: var(--accent);
}

.tool-entry {
  flex-shrink: 0;
  font-size: 0.92rem;
  padding: 8px 20px;
  border: 1px solid var(--primary);
  border-radius: var(--radius);
  color: var(--primary);
  font-weight: 500;
  transition: background-color var(--transition), color var(--transition);
}

.tool-entry:hover {
  background-color: var(--primary);
  color: var(--white);
}

/* 内页主容器 */
.inner-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* 面包屑 */
.breadcrumb {
  padding: 20px 0 0;
  font-size: 0.85rem;
  color: var(--text-light);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

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

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

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

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

/* 页面标题区 */
.page-header {
  padding: 28px 0 8px;
}

.page-title {
  font-size: 2rem;
  color: var(--primary-dark);
}

.page-title-area {
  padding: 8px 0 12px;
}

.page-lead,
.page-intro {
  font-size: 1.05rem;
  color: var(--text-light);
  max-width: var(--content-max);
  line-height: 1.8;
}

/* ============================================================
   components — 通用组件
   ============================================================ */

/* 按钮 */
.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 0.95rem;
  border-radius: var(--radius);
  font-weight: 500;
  transition: background-color var(--transition), color var(--transition), border-color var(--transition);
}

.btn-primary {
  background-color: var(--primary);
  color: var(--white);
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  color: var(--white);
}

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

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

/* 区块标题 */
.section-header {
  margin-bottom: 32px;
}

.section-index {
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.section-desc {
  color: var(--text-light);
  font-size: 0.98rem;
  max-width: var(--content-max);
}

/* 图片容器 */
.content-media,
.material-figure,
.section-figure,
.process-figure,
.hero-figure {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-card);
  background-color: var(--bg-soft);
}

.content-media img,
.material-figure img,
.section-figure img,
.process-figure img,
.hero-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.content-media figcaption,
.material-figure figcaption,
.section-figure figcaption,
.process-figure figcaption,
.hero-figure figcaption {
  padding: 10px 16px;
  font-size: 0.85rem;
  color: var(--text-light);
  background-color: rgba(245, 241, 232, 0.92);
  border-top: 1px solid var(--border);
}

.content-media-primary {
  width: 100%;
  max-height: 420px;
}

.content-media-primary img {
  height: 100%;
  min-height: 240px;
  max-height: 420px;
}

.content-media-inline {
  max-width: var(--content-max);
  margin-top: 16px;
}

.content-media-inline img {
  height: 260px;
}

/* 相关链接 */
.related-links {
  padding: 24px 0;
}

.related-links-label {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-right: 16px;
}

.related-links-item {
  display: inline-block;
  margin-right: 20px;
  font-size: 0.95rem;
  color: var(--primary);
  border-bottom: 1px solid var(--border);
  padding-bottom: 2px;
}

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

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

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px 24px 32px;
}

.footer-brand {
  margin-bottom: 24px;
}

.footer-brand-name {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 8px;
}

.footer-desc {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.7);
  max-width: 480px;
}

.footer-nav {
  margin-bottom: 32px;
}

.footer-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 28px;
}

.footer-nav a {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.9rem;
}

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

.footer-copyright {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.55);
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 24px;
}

/* ============================================================
   pages — 首页
   ============================================================ */

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

/* 首屏 */
.hero-section {
  padding: 64px 0 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

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

.hero-kicker {
  font-size: 0.9rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: 0.06em;
}

.hero-section h1 {
  font-size: 2.4rem;
  line-height: 1.3;
  margin-bottom: 20px;
}

.hero-lead {
  font-size: 1.05rem;
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-figure {
  height: 360px;
}

.hero-figure img {
  height: 100%;
}

.hero-next-hint {
  grid-column: 1 / -1;
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-light);
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.hero-next-hint::after {
  content: "↓";
  display: block;
  margin-top: 8px;
  color: var(--accent);
  font-size: 1.1rem;
}

/* 业务标签 */
.service-tags-section {
  padding: 56px 0;
  border-top: 1px solid var(--border);
}

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

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

.service-tag-item:hover {
  box-shadow: 0 4px 16px rgba(47, 74, 62, 0.08);
  transform: translateY(-2px);
}

.service-tag-item h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
  position: relative;
  padding-bottom: 12px;
}

.service-tag-item h3::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 2px;
  background-color: var(--accent);
}

.service-tag-item p {
  font-size: 0.92rem;
  color: var(--text-light);
  margin-bottom: 16px;
}

.service-tag-item a {
  font-size: 0.9rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.service-tag-item a::after {
  content: "→";
  transition: transform var(--transition);
}

.service-tag-item a:hover::after {
  transform: translateX(4px);
}

/* 单列内容流 */
.content-stream-section {
  padding: 56px 0;
  border-top: 1px solid var(--border);
}

.content-stream {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: var(--content-max);
}

.stream-item {
  display: flex;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}

.stream-item:first-child {
  padding-top: 0;
}

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

.item-number {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  color: var(--border);
  font-weight: 700;
  line-height: 1;
  flex-shrink: 0;
  width: 48px;
}

.item-body h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.item-body p {
  font-size: 0.92rem;
  color: var(--text-light);
  margin-bottom: 8px;
}

.item-cycle {
  font-size: 0.82rem;
  color: var(--accent);
  display: block;
}

/* 服务目录 */
.service-directory-section {
  padding: 56px 0;
  border-top: 1px solid var(--border);
}

.service-directory {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: var(--content-max);
}

.directory-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 20px 24px;
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  transition: border-color var(--transition), background-color var(--transition);
}

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

.directory-item h3 {
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.directory-item p {
  font-size: 0.88rem;
  color: var(--text-light);
  margin-bottom: 0;
}

.directory-item a {
  flex-shrink: 0;
  font-size: 0.9rem;
  color: var(--accent);
}

.directory-item a::after {
  content: "→";
  margin-left: 4px;
}

/* 置顶公告与规则 */
.notice-section {
  padding: 56px 0;
  border-top: 1px solid var(--border);
}

.notice-banner {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background-color: var(--white);
  border-left: 3px solid var(--accent);
  padding: 20px 24px;
  margin-bottom: 32px;
}

.notice-label {
  flex-shrink: 0;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
}

.notice-content {
  font-size: 0.95rem;
  color: var(--text);
  margin-bottom: 0;
}

.rules-block {
  max-width: var(--content-max);
}

.rules-block h2 {
  font-size: 1.3rem;
  margin-bottom: 16px;
}

.rules-block ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.rules-block li {
  position: relative;
  padding-left: 20px;
  font-size: 0.92rem;
  color: var(--text-light);
}

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

/* 常用主题链接 */
.topic-links-section {
  padding: 56px 0;
  border-top: 1px solid var(--border);
}

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

.topic-link {
  display: block;
  padding: 24px;
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.topic-link:hover {
  border-color: var(--primary);
  box-shadow: 0 4px 12px rgba(47, 74, 62, 0.06);
}

.topic-link h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
  color: var(--primary);
}

.topic-link p {
  font-size: 0.88rem;
  color: var(--text-light);
  margin-bottom: 0;
}

/* 服务对比 */
.compare-section {
  padding: 56px 0;
  border-top: 1px solid var(--border);
}

.compare-selector {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: var(--content-max);
}

.compare-option {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  cursor: pointer;
  transition: border-color var(--transition), background-color var(--transition);
}

.compare-option:hover {
  border-color: var(--primary);
}

.compare-option input[type="checkbox"] {
  accent-color: var(--primary);
  width: 18px;
  height: 18px;
  margin-bottom: 8px;
}

.compare-label {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--primary-dark);
}

.compare-desc {
  font-size: 0.85rem;
  color: var(--text-light);
}

.compare-hint {
  margin-top: 16px;
  font-size: 0.88rem;
  color: var(--text-light);
}

/* 合作流程入口 */
.process-entry-section {
  padding: 56px 0;
  border-top: 1px solid var(--border);
}

.process-preview {
  max-width: var(--content-max);
}

.process-preview .section-index {
  margin-bottom: 8px;
}

.process-preview h2 {
  font-size: 1.6rem;
  margin-bottom: 24px;
}

.process-steps {
  display: flex;
  gap: 24px;
  margin-bottom: 24px;
  counter-reset: step;
}

.process-steps li {
  flex: 1;
  text-align: center;
  position: relative;
  padding-top: 44px;
}

.process-steps li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--primary);
  color: var(--white);
  font-size: 0.9rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}

.process-steps li::after {
  content: "";
  position: absolute;
  top: 16px;
  left: calc(50% + 24px);
  right: calc(-50% + 24px);
  height: 1px;
  background-color: var(--border);
}

.process-steps li:last-child::after {
  display: none;
}

.step-num {
  font-size: 0.92rem;
  color: var(--text);
  font-weight: 500;
}

.process-note {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 24px;
}

.process-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ============================================================
   pages — 大事件跟踪
   ============================================================ */

.archive-structure {
  padding: 32px 0;
}

.archive-structure h2,
.tracking-flow h2,
.usage-scene h2,
.content-boundary h2 {
  font-size: 1.4rem;
  margin-bottom: 12px;
}

.section-intro {
  color: var(--text-light);
  font-size: 0.95rem;
  margin-bottom: 28px;
  max-width: var(--content-max);
}

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

.plaque-item {
  display: flex;
  gap: 16px;
  padding: 24px;
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
}

.plaque-number {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
  line-height: 1.2;
}

.plaque-item h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.plaque-item p {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 0;
}

.tracking-flow {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.step-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: var(--content-max);
}

.step-item {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
  position: relative;
  padding-left: 56px;
}

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

.step-number {
  position: absolute;
  left: 0;
  top: 20px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--bg-soft);
  border: 1px solid var(--primary);
  color: var(--primary);
  font-size: 0.9rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-item h3 {
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.step-item p {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 6px;
}

.step-output {
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 0;
}

.usage-scene {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

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

.scene-block {
  padding: 24px;
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
}

.scene-block h3 {
  font-size: 1.05rem;
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.scene-block p {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 0;
}

.content-boundary {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.content-boundary > p {
  color: var(--text-light);
  font-size: 0.95rem;
  max-width: var(--content-max);
}

.content-boundary .related-links {
  padding-top: 16px;
}

/* ============================================================
   pages — 会议资料
   ============================================================ */

.material-group-principle {
  padding: 24px 0;
}

.material-group-principle h2 {
  font-size: 1.4rem;
  margin-bottom: 12px;
}

.material-group-principle > p {
  color: var(--text-light);
  font-size: 0.95rem;
  max-width: var(--content-max);
}

.group-tags {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.group-tags li {
  padding: 6px 18px;
  background-color: var(--white);
  border: 1px solid var(--primary);
  border-radius: 999px;
  font-size: 0.88rem;
  color: var(--primary);
}

.material-pack {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.material-pack h2 {
  font-size: 1.3rem;
  margin-bottom: 16px;
}

.material-figure {
  max-width: var(--content-max);
  margin-bottom: 24px;
}

.material-figure img {
  height: 220px;
}

.material-pack-info {
  max-width: var(--content-max);
}

.material-pack-info h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--primary);
}

.material-pack-info p {
  font-size: 0.92rem;
  color: var(--text-light);
  margin-bottom: 16px;
}

.material-pack-info ul {
  margin-bottom: 16px;
}

.material-pack-info li {
  position: relative;
  padding-left: 18px;
  font-size: 0.9rem;
  color: var(--text);
  margin-bottom: 6px;
}

.material-pack-info li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent);
}

.usage-guide {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.usage-guide h2 {
  font-size: 1.4rem;
  margin-bottom: 16px;
}

.usage-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: var(--content-max);
}

.usage-list li {
  padding: 16px 20px;
  background-color: var(--white);
  border-left: 3px solid var(--primary);
  border-radius: var(--radius-card);
  font-size: 0.92rem;
  color: var(--text);
}

.related-links h2 {
  font-size: 1.3rem;
  margin-bottom: 12px;
}

.related-links > p {
  color: var(--text-light);
  font-size: 0.95rem;
}

.related-links ul {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.related-links ul a {
  padding: 8px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  background-color: var(--white);
  font-size: 0.9rem;
  transition: border-color var(--transition);
}

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

/* ============================================================
   pages — 参会支持
   ============================================================ */

.stage-preview,
.preparation-list,
.recording-method,
.summary-template,
.team-collaboration {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.stage-preview h2,
.preparation-list h2,
.recording-method h2,
.summary-template h2,
.team-collaboration h2 {
  font-size: 1.4rem;
  margin-bottom: 12px;
}

.section-note {
  color: var(--text-light);
  font-size: 0.95rem;
  margin-bottom: 24px;
  max-width: var(--content-max);
}

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

.stage-card {
  padding: 24px;
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  display: flex;
  flex-direction: column;
}

.stage-card h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.stage-card > p {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 16px;
}

.stage-card figure {
  margin-top: auto;
}

.stage-card img {
  height: 160px;
  width: 100%;
  object-fit: cover;
  border-radius: var(--radius-card);
}

.stage-card figcaption {
  font-size: 0.82rem;
  color: var(--text-light);
  padding: 8px 0 0;
}

.prep-items {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: var(--content-max);
}

.prep-item {
  display: flex;
  gap: 16px;
  padding: 20px;
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
}

.prep-item h3 {
  font-size: 1rem;
  margin-bottom: 6px;
  flex-shrink: 0;
  width: 140px;
}

.prep-item p {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 0;
}

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

.method-item,
.summary-item {
  padding: 24px;
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
}

.method-item h3,
.summary-item h3 {
  font-size: 1.05rem;
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.method-item p,
.summary-item p {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 0;
}

.collab-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: var(--content-max);
}

.collab-item {
  padding: 20px 24px;
  background-color: var(--white);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-card);
}

.collab-item h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.collab-item p {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 0;
}

.page-links {
  padding: 24px 0;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.page-links a {
  padding: 8px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  background-color: var(--white);
  font-size: 0.9rem;
}

.page-links a:hover {
  border-color: var(--primary);
}

/* ============================================================
   pages — 合作流程
   ============================================================ */

.process-overview,
.step-block,
.time-acceptance,
.service-boundary {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.process-overview h2,
.step-block h2,
.time-acceptance h2,
.service-boundary h2 {
  font-size: 1.4rem;
  margin-bottom: 12px;
}

.process-overview > p {
  color: var(--text-light);
  font-size: 0.95rem;
  max-width: var(--content-max);
}

.process-step-list {
  display: flex;
  gap: 16px;
  margin: 24px 0;
  counter-reset: process-step;
}

.process-step-item {
  flex: 1;
  text-align: center;
  position: relative;
  padding-top: 44px;
}

.process-step-item::before {
  counter-increment: process-step;
  content: counter(process-step);
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--accent);
  color: var(--white);
  font-size: 0.9rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}

.process-step-item::after {
  content: "";
  position: absolute;
  top: 16px;
  left: calc(50% + 24px);
  right: calc(-50% + 24px);
  height: 1px;
  background-color: var(--border);
}

.process-step-item:last-child::after {
  display: none;
}

.step-name {
  font-size: 0.92rem;
  color: var(--text);
  font-weight: 500;
}

.process-figure {
  max-width: var(--content-max);
}

.process-figure img {
  height: 220px;
}

.io-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: var(--content-max);
}

.io-client,
.io-service {
  padding: 24px;
  border-radius: var(--radius-card);
}

.io-client {
  background-color: var(--bg-soft);
  border: 1px solid var(--border);
}

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

.io-client h3,
.io-service h3 {
  font-size: 1rem;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.io-client ul,
.io-service ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.io-client li,
.io-service li {
  position: relative;
  padding-left: 18px;
  font-size: 0.9rem;
  color: var(--text);
}

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

.time-acceptance > p,
.service-boundary > p {
  color: var(--text-light);
  font-size: 0.95rem;
  max-width: var(--content-max);
}

.service-boundary .related-links {
  padding-top: 8px;
}

/* ============================================================
   pages — 常见问题
   ============================================================ */

.faq-tabs {
  padding: 24px 0;
}

.faq-tabs-inner {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
  padding-bottom: 16px;
}

.faq-tab {
  padding: 8px 20px;
  font-size: 0.92rem;
  color: var(--text);
  background-color: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font-sans);
  transition: background-color var(--transition), color var(--transition), border-color var(--transition);
}

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

.faq-tab.is-active {
  background-color: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

.faq-group {
  padding: 24px 0;
}

.faq-group h2 {
  font-size: 1.3rem;
  margin-bottom: 20px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: var(--content-max);
}

.faq-item {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.faq-item summary {
  padding: 18px 24px;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--primary-dark);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 48px;
  transition: color var(--transition);
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.2rem;
  color: var(--accent);
  transition: transform var(--transition);
}

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

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

.faq-answer {
  padding: 0 24px 20px;
  border-top: 1px solid var(--border);
}

.faq-answer p {
  font-size: 0.92rem;
  color: var(--text-light);
  margin-top: 16px;
  margin-bottom: 0;
  line-height: 1.8;
}

.faq-closing {
  padding: 24px 0;
  border-top: 1px solid var(--border);
}

.faq-closing p {
  font-size: 0.95rem;
  color: var(--text);
}

.faq-closing a {
  font-weight: 500;
  border-bottom: 1px solid var(--border);
  padding-bottom: 2px;
}

.faq-closing a:hover {
  border-color: var(--accent);
}

/* ============================================================
   pages — 服务说明
   ============================================================ */

.content-section {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.content-section h2 {
  font-size: 1.4rem;
  margin-bottom: 20px;
}

.positioning-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}

.section-figure img {
  height: 240px;
}

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

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

.principle-item h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--primary);
}

.principle-item p {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 0;
}

.boundary-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: var(--content-max);
}

.boundary-list li {
  position: relative;
  padding: 14px 20px;
  padding-left: 44px;
  background-color: var(--white);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-card);
  font-size: 0.92rem;
  color: var(--text);
}

.boundary-list li::before {
  content: "✕";
  position: absolute;
  left: 16px;
  top: 14px;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.9rem;
}

.applicable-users .section-desc {
  margin-bottom: 20px;
}

.applicable-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: var(--content-max);
  margin-bottom: 16px;
}

.applicable-list li {
  padding: 14px 20px;
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  font-size: 0.92rem;
}

.limitation-note {
  font-size: 0.88rem;
  color: var(--text-light);
  background-color: var(--bg-soft);
  padding: 14px 20px;
  border-radius: var(--radius-card);
  max-width: var(--content-max);
}

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

.method-card {
  padding: 24px;
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  transition: border-color var(--transition);
}

.method-card:hover {
  border-color: var(--primary);
}

.method-card h3 {
  font-size: 1.05rem;
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.method-card p {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 0;
}

.related-entry {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.related-entry a {
  padding: 8px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  background-color: var(--white);
  font-size: 0.9rem;
}

.related-entry a:hover {
  border-color: var(--primary);
}

.link-separator {
  color: var(--border);
}

/* ============================================================
   pages — 404
   ============================================================ */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 48px 24px;
}

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

.error-code {
  font-family: var(--font-serif);
  font-size: 4rem;
  color: var(--border);
  font-weight: 700;
  line-height: 1;
  margin-bottom: 16px;
}

.error-section h1 {
  font-size: 1.6rem;
  margin-bottom: 16px;
}

.error-desc {
  color: var(--text-light);
  margin-bottom: 24px;
}

.btn-back {
  display: inline-block;
  padding: 12px 32px;
  background-color: var(--primary);
  color: var(--white);
  border-radius: var(--radius);
  font-size: 0.95rem;
  transition: background-color var(--transition);
}

.btn-back:hover {
  background-color: var(--primary-dark);
  color: var(--white);
}

/* ============================================================
   responsive — 响应式
   ============================================================ */

/* 平板 1024px */
@media (max-width: 1024px) {
  .header-inner {
    padding: 0 20px;
  }

  .home-main,
  .inner-main {
    padding: 0 20px;
  }

  .hero-section {
    gap: 32px;
  }

  .hero-section h1 {
    font-size: 2rem;
  }

  .hero-figure {
    height: 320px;
  }

  .service-tags,
  .stage-grid,
  .method-grid,
  .summary-grid,
  .scene-group,
  .service-method-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

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

  .main-nav {
    order: 3;
    width: 100%;
    border-top: 1px solid var(--border);
    margin-top: 8px;
    padding-top: 8px;
  }

  .main-nav ul {
    flex-wrap: wrap;
    gap: 2px;
  }

  .main-nav a {
    padding: 8px 12px;
    font-size: 0.88rem;
  }

  .tool-entry {
    padding: 6px 14px;
    font-size: 0.88rem;
  }

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

  .breadcrumb {
    padding-top: 16px;
  }

  .page-title {
    font-size: 1.6rem;
  }

  .page-lead,
  .page-intro {
    font-size: 0.95rem;
  }

  .hero-section {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 40px 0 32px;
  }

  .hero-section h1 {
    font-size: 1.8rem;
  }

  .hero-figure {
    height: 240px;
    order: 2;
  }

  .hero-content {
    order: 1;
  }

  .hero-next-hint {
    order: 3;
  }

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

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

  .service-tags,
  .stage-grid,
  .method-grid,
  .summary-grid,
  .scene-group,
  .service-method-grid {
    grid-template-columns: 1fr;
  }

  .topic-links,
  .compare-selector,
  .plaque-list {
    grid-template-columns: 1fr;
  }

  .process-steps,
  .process-step-list {
    flex-direction: column;
    gap: 12px;
  }

  .process-steps li,
  .process-step-item {
    text-align: left;
    padding-top: 0;
    padding-left: 44px;
  }

  .process-steps li::before,
  .process-step-item::before {
    left: 0;
    top: 0;
    transform: none;
  }

  .process-steps li::after,
  .process-step-item::after {
    display: none;
  }

  .io-pair,
  .positioning-wrap {
    grid-template-columns: 1fr;
  }

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

  .prep-item h3 {
    width: auto;
  }

  .step-item {
    padding-left: 48px;
  }

  .footer-inner {
    padding: 32px 16px 24px;
  }

  .footer-nav ul {
    flex-direction: column;
    gap: 8px;
  }

  .notice-banner {
    flex-direction: column;
    gap: 8px;
  }

  .stream-item {
    gap: 16px;
  }

  .item-number {
    font-size: 1.3rem;
    width: 36px;
  }

  .directory-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

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

  .link-separator {
    display: none;
  }

  .faq-tabs-inner {
    gap: 6px;
  }

  .faq-tab {
    padding: 6px 14px;
    font-size: 0.85rem;
  }

  .faq-item summary {
    padding: 14px 16px;
    padding-right: 40px;
    font-size: 0.92rem;
  }

  .faq-answer {
    padding: 0 16px 16px;
  }

  .content-media-inline img {
    height: 200px;
  }

  .material-figure img,
  .process-figure img {
    height: 180px;
  }

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

  .stage-card img {
    height: 140px;
  }

  .boundary-list li {
    padding-left: 40px;
  }

  .boundary-list li::before {
    left: 14px;
  }
}

/* 小屏手机 390px 及以下 */
@media (max-width: 390px) {
  .brand-name {
    font-size: 1.1rem;
  }

  .main-nav a {
    padding: 6px 10px;
    font-size: 0.82rem;
  }

  .tool-entry {
    padding: 6px 10px;
    font-size: 0.82rem;
  }

  .hero-section h1 {
    font-size: 1.6rem;
  }

  .hero-lead {
    font-size: 0.95rem;
  }

  .section-header h2 {
    font-size: 1.3rem;
  }

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

  .item-number {
    width: auto;
  }

  .service-tag-item,
  .plaque-item,
  .scene-block,
  .method-item,
  .summary-item,
  .collab-item,
  .prep-item {
    padding: 16px;
  }

  .process-steps li,
  .process-step-item {
    padding-left: 40px;
  }

  .process-steps li::before,
  .process-step-item::before {
    width: 28px;
    height: 28px;
    font-size: 0.82rem;
  }

  .step-item {
    padding-left: 40px;
  }

  .step-number {
    width: 30px;
    height: 30px;
    font-size: 0.82rem;
    top: 20px;
  }

  .io-client,
  .io-service {
    padding: 16px;
  }

  .faq-tab {
    padding: 5px 10px;
    font-size: 0.8rem;
  }

  .faq-tabs-inner {
    gap: 4px;
  }

  .group-tags li {
    padding: 4px 14px;
    font-size: 0.82rem;
  }
}