/* ============================================================
   BASE — 变量、重置、全局字体与基础元素
   ============================================================ */
:root {
  --color-primary: #0F2D3D;
  --color-accent: #E4572E;
  --color-success: #2A9D8F;
  --color-warning: #F4B942;
  --color-bg: #F5F1E8;
  --color-text: #1A1A1A;
  --color-text-light: #5A6B74;
  --color-border: #D8D2C4;
  --color-white: #FFFFFF;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", Consolas, "Courier New", monospace;
  --container-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-card: 0 1px 3px rgba(15, 45, 61, 0.08);
  --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(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-primary);
}

p {
  margin-bottom: 0.8rem;
}

figure {
  margin: 0;
}

table {
  border-collapse: collapse;
  width: 100%;
}

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

/* ============================================================
   LAYOUT — 全站容器、页头、页脚、面包屑、页面标题区
   ============================================================ */
.site-header {
  background-color: var(--color-primary);
  border-bottom: 3px solid var(--color-accent);
}

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  color: var(--color-white);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

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

.brand-name {
  font-size: 1.3rem;
}

.site-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-list li a {
  display: block;
  padding: 8px 14px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-base), color var(--transition-base);
}

.nav-list li a:hover {
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.1);
}

.nav-list li a.is-current {
  color: var(--color-white);
  background-color: rgba(228, 87, 46, 0.35);
  font-weight: 600;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
  width: 44px;
  height: 44px;
  justify-content: center;
  align-items: center;
}

.nav-toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 2px;
}

.version-chip {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  background-color: rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.9);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  white-space: nowrap;
}

.site-main {
  min-height: 60vh;
}

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

/* 内页布局外壳 */
.layout-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 56px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 40px;
  align-items: start;
}

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

.site-inner {
  background-color: var(--color-bg);
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--color-text-light);
  margin-bottom: 16px;
  flex-wrap: wrap;
}

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

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

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

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

/* 页面标题区 */
.page-header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
}

.page-title {
  font-size: 2rem;
  line-height: 1.3;
  margin-bottom: 12px;
}

.page-description {
  font-size: 1.05rem;
  color: var(--color-text-light);
  max-width: 720px;
  line-height: 1.7;
}

/* 页脚 */
.site-footer {
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.8);
  margin-top: 40px;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px 16px;
}

.footer-brand {
  margin-bottom: 28px;
}

.footer-tagline {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 6px;
}

.footer-desc {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  max-width: 560px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 28px;
}

.footer-col h3 {
  color: var(--color-white);
  font-size: 1rem;
  margin-bottom: 12px;
  font-weight: 600;
}

.footer-col ul li {
  margin-bottom: 6px;
}

.footer-col ul li a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
}

.footer-col ul li a:hover {
  color: var(--color-accent);
}

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

.footer-bottom p {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.5);
  margin: 0;
}

/* ============================================================
   COMPONENTS — 通用组件：状态标签、卡片、按钮、FAQ、表格
   ============================================================ */
.status-tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.4;
  border-radius: 20px;
  border: 1px solid transparent;
  white-space: nowrap;
}

.status-active {
  background-color: rgba(42, 157, 143, 0.12);
  color: var(--color-success);
  border-color: rgba(42, 157, 143, 0.3);
}

.status-archived {
  background-color: rgba(90, 107, 116, 0.1);
  color: var(--color-text-light);
  border-color: var(--color-border);
}

.status-superseded {
  background-color: rgba(228, 87, 46, 0.1);
  color: var(--color-accent);
  border-color: rgba(228, 87, 46, 0.25);
}

.status-pending {
  background-color: rgba(244, 185, 66, 0.12);
  color: #9A7A1E;
  border-color: rgba(244, 185, 66, 0.35);
}

.status-done {
  background-color: rgba(42, 157, 143, 0.12);
  color: var(--color-success);
  border-color: rgba(42, 157, 143, 0.3);
}

.status-current {
  background-color: rgba(42, 157, 143, 0.15);
  color: var(--color-success);
  border-color: rgba(42, 157, 143, 0.35);
}

.status-upcoming {
  background-color: rgba(244, 185, 66, 0.12);
  color: #9A7A1E;
  border-color: rgba(244, 185, 66, 0.35);
}

.status-common {
  background-color: rgba(42, 157, 143, 0.12);
  color: var(--color-success);
  border-color: rgba(42, 157, 143, 0.3);
}

.status-conditional {
  background-color: rgba(244, 185, 66, 0.12);
  color: #9A7A1E;
  border-color: rgba(244, 185, 66, 0.35);
}

/* 区块标题 */
.section-heading {
  margin-bottom: 24px;
}

.section-heading h2 {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.section-heading p {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

.section-title {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.section-intro,
.section-desc {
  color: var(--color-text-light);
  font-size: 0.95rem;
  margin-bottom: 20px;
}

/* 通用链接样式 */
.section-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.92rem;
  margin-top: 16px;
}

.section-link::after {
  content: "→";
  transition: transform var(--transition-base);
}

.section-link:hover::after {
  transform: translateX(4px);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background-color var(--transition-base), transform var(--transition-base);
  min-height: 44px;
}

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

.btn-primary:hover {
  background-color: #C94720;
  color: var(--color-white);
}

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

.faq-item summary {
  padding: 16px 20px;
  font-weight: 600;
  font-size: 0.98rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--color-primary);
}

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

.faq-item summary::after {
  content: "+";
  font-size: 1.3rem;
  color: var(--color-accent);
  flex-shrink: 0;
  font-weight: 400;
}

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

.faq-item[open] summary {
  border-bottom: 1px solid var(--color-border);
}

.faq-answer {
  padding: 16px 20px;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--color-text);
}

/* 图片容器 */
figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

figcaption {
  font-size: 0.82rem;
  color: var(--color-text-light);
  text-align: center;
  padding: 8px 0;
  line-height: 1.5;
}

/* 侧栏 */
.side-panel,
.sidebar-panel,
.info-panel,
.aside-panel {
  position: sticky;
  top: 24px;
}

.side-panel-inner,
.sidebar-inner,
.aside-inner {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.side-block,
.side-card,
.sidebar-card,
.sidebar-section,
.panel-block,
.aside-block {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.side-title,
.sidebar-title,
.panel-title,
.aside-title {
  font-size: 1rem;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-accent);
  font-weight: 600;
}

.side-list li,
.side-nav li,
.sidebar-list li,
.panel-list li,
.aside-list li {
  margin-bottom: 8px;
  font-size: 0.9rem;
}

.side-list li a,
.side-nav li a,
.sidebar-list li a,
.panel-list li a,
.aside-list li a {
  color: var(--color-text);
  display: block;
  padding: 4px 0;
  border-left: 3px solid transparent;
  padding-left: 10px;
  transition: border-color var(--transition-base), color var(--transition-base);
}

.side-list li a:hover,
.side-nav li a:hover,
.sidebar-list li a:hover,
.panel-list li a:hover,
.aside-list li a:hover {
  color: var(--color-accent);
  border-left-color: var(--color-accent);
}

.side-note,
.side-status-note,
.panel-note,
.aside-status-desc {
  font-size: 0.82rem;
  color: var(--color-text-light);
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--color-border);
}

.side-status,
.panel-status,
.sidebar-status,
.aside-status {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-success);
  display: block;
  margin-top: 8px;
}

/* ============================================================
   PAGES — 首页及各内页特有模块
   ============================================================ */

/* ---------- 首页 ---------- */
.home-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 56px;
}

/* 场景选择首屏 */
.hero-scene {
  padding: 48px 0 40px;
}

.hero-copy {
  max-width: 880px;
  margin-bottom: 24px;
}

.hero-copy h1 {
  font-size: 2.25rem;
  line-height: 1.3;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 1.1rem;
  color: var(--color-text-light);
  max-width: 720px;
  line-height: 1.7;
}

.hero-media {
  margin: 32px 0;
}

.hero-figure {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-white);
  padding: 12px;
}

.hero-figure img {
  border-radius: var(--radius-md);
}

.scene-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 32px 0;
}

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

.scene-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 12px rgba(15, 45, 61, 0.1);
}

.scene-title {
  font-size: 1.1rem;
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-accent);
}

.scene-desc {
  font-size: 0.92rem;
  color: var(--color-text-light);
  margin-bottom: 14px;
}

.scene-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 600;
  font-size: 0.9rem;
}

.scene-link::after {
  content: "→";
  transition: transform var(--transition-base);
}

.scene-link:hover::after {
  transform: translateX(4px);
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 36px;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-weight: 600;
  border-radius: var(--radius-md);
  font-size: 1rem;
  transition: background-color var(--transition-base);
  min-height: 48px;
}

.hero-cta:hover {
  background-color: #C94720;
  color: var(--color-white);
}

/* 能力阶段总览 */
.capability-overview {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
}

.capability-stages {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
}

.stage-row {
  display: grid;
  grid-template-columns: 56px 160px 1fr auto;
  align-items: center;
  gap: 16px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  transition: border-color var(--transition-base);
}

.stage-row:hover {
  border-color: var(--color-accent);
}

.stage-num {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-accent);
  text-align: center;
}

.stage-name {
  font-weight: 600;
  font-size: 0.98rem;
}

.stage-desc {
  font-size: 0.88rem;
  color: var(--color-text-light);
}

.stage-status {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 3px 10px;
  border-radius: 20px;
  background-color: rgba(42, 157, 143, 0.1);
  color: var(--color-success);
  border: 1px solid rgba(42, 157, 143, 0.3);
  white-space: nowrap;
}

.capability-figure {
  margin: 24px 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  padding: 12px;
}

/* 合作流程预览 */
.process-preview {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin: 24px 0;
}

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

.process-step:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 12px rgba(15, 45, 61, 0.08);
}

.step-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-accent);
  margin-bottom: 8px;
  font-weight: 700;
}

.step-action {
  display: block;
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 6px;
}

.step-deliverable {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-light);
}

/* 版本记录快照 */
.version-snapshot {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
}

.version-current {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-success);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.version-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text-light);
}

.version-number {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-primary);
}

.version-status {
  margin-left: 8px;
}

.version-date {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-left: auto;
}

.version-history {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.version-history li {
  display: grid;
  grid-template-columns: 120px 140px 1fr;
  gap: 16px;
  align-items: center;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 0.9rem;
}

.history-version {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.88rem;
}

.history-date {
  font-size: 0.82rem;
  color: var(--color-text-light);
}

.history-change {
  color: var(--color-text);
  font-size: 0.88rem;
}

/* 问题帮助分区 */
.help-preview {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
}

.help-layout {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 32px;
}

.help-topics {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.topic-link {
  display: block;
  padding: 10px 14px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  transition: border-color var(--transition-base), color var(--transition-base);
}

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

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

/* 下一步引导 */
.next-steps {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
}

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

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

.next-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 12px rgba(15, 45, 61, 0.1);
}

.next-card h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

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

/* 首页相关链接 */
.related-links {
  padding: 20px 0;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.related-links-label {
  font-size: 0.85rem;
  color: var(--color-text-light);
  font-weight: 600;
}

.related-links-item {
  font-size: 0.88rem;
  color: var(--color-primary);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base);
}

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

/* ---------- 新手指南页 ---------- */
.prep-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

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

.prep-card:hover {
  border-color: var(--color-accent);
}

.prep-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.prep-card-head h3 {
  font-size: 1rem;
}

.prep-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 12px;
  white-space: nowrap;
}

.prep-tag.is-required {
  background-color: rgba(228, 87, 46, 0.1);
  color: var(--color-accent);
  border: 1px solid rgba(228, 87, 46, 0.25);
}

.prep-tag.is-optional {
  background-color: rgba(90, 107, 116, 0.1);
  color: var(--color-text-light);
  border: 1px solid var(--color-border);
}

.prep-purpose {
  font-size: 0.88rem;
  color: var(--color-text);
  margin-bottom: 6px;
}

.prep-example {
  font-size: 0.82rem;
  color: var(--color-text-light);
  border-left: 3px solid var(--color-border);
  padding-left: 10px;
}

/* 五步流程时间线 */
.process-timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
  padding-left: 0;
  margin-bottom: 24px;
}

.process-timeline .process-step {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 16px;
  padding: 20px 24px;
  border-left: 3px solid var(--color-border);
  border-radius: 0;
  background-color: transparent;
  border-top: 1px solid var(--color-border);
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 12px;
  position: relative;
}

.process-timeline .process-step:last-child {
  border-bottom: 1px solid var(--color-border);
}

.step-number {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  padding-top: 4px;
}

.step-body {
  min-width: 0;
}

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

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

.step-status {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-success);
  display: inline-block;
  margin-top: 4px;
}

.process-figure {
  margin: 24px 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  padding: 12px;
}

/* 自检问题 */
.selfcheck-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

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

.selfcheck-item h3 {
  font-size: 1rem;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-accent);
}

.check-standard {
  font-size: 0.88rem;
  color: var(--color-text);
  margin-bottom: 8px;
}

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

/* ---------- 核心能力页 ---------- */
.capability-flow {
  margin-bottom: 40px;
}

.capability-table-section {
  margin-bottom: 40px;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
}

.capability-table {
  width: 100%;
  min-width: 640px;
}

.capability-table thead {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.capability-table th {
  padding: 14px 16px;
  text-align: left;
  font-size: 0.9rem;
  font-weight: 600;
  white-space: nowrap;
}

.capability-table td {
  padding: 14px 16px;
  border-top: 1px solid var(--color-border);
  font-size: 0.88rem;
  vertical-align: top;
}

.capability-table tbody tr:hover {
  background-color: rgba(245, 241, 232, 0.5);
}

.capability-details {
  margin-bottom: 40px;
}

.capability-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 16px;
}

.capability-card-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-accent);
}

.capability-num {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-accent);
}

.capability-name {
  font-size: 1.1rem;
}

.capability-meta {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.meta-row {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 12px;
  font-size: 0.9rem;
}

.meta-row dt {
  font-weight: 600;
  color: var(--color-primary);
}

.meta-row dd {
  color: var(--color-text);
}

/* 适用范围提示 */
.scope-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

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

.scope-item-title {
  font-size: 1rem;
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-border);
}

.scope-fit .scope-item-title {
  border-bottom-color: var(--color-success);
}

.scope-not-fit .scope-item-title {
  border-bottom-color: var(--color-accent);
}

.scope-ask .scope-item-title {
  border-bottom-color: var(--color-warning);
}

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

/* 相关链接列表 */
.related-link-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.related-link-list li a {
  display: block;
  padding: 10px 14px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  transition: border-color var(--transition-base);
}

.related-link-list li a:hover {
  border-color: var(--color-accent);
}

/* ---------- 适用场景页 ---------- */
.intro-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

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

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

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

.scenario-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

.scenario-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.scenario-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 12px rgba(15, 45, 61, 0.08);
}

.scenario-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background-color: var(--color-primary);
  color: var(--color-white);
}

.scenario-index {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-accent);
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  padding: 4px 10px;
}

.scenario-head h3 {
  color: var(--color-white);
  font-size: 1.05rem;
  flex: 1;
}

.scenario-body {
  padding: 16px 20px;
}

.scenario-row {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 10px;
  font-size: 0.88rem;
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
}

.scenario-row:last-child {
  border-bottom: none;
}

.scenario-row strong {
  font-weight: 600;
  color: var(--color-primary);
}

.scenario-row span {
  color: var(--color-text);
}

.media-figure {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  padding: 12px;
  margin: 24px 0;
}

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

.exclusion-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 20px;
}

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

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

/* ---------- 合作流程页 ---------- */
.checklist-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.check-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  transition: border-color var(--transition-base);
}

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

.check-item h3 {
  font-size: 0.98rem;
  margin-bottom: 6px;
}

.check-item p {
  font-size: 0.88rem;
  color: var(--color-text);
  margin-bottom: 6px;
}

.meta-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-accent);
  display: inline-block;
  padding: 2px 8px;
  background-color: rgba(228, 87, 46, 0.08);
  border-radius: 12px;
}

.process-steps .step-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.step-header h3 {
  font-size: 1rem;
}

.step-number {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-accent);
}

.version-note {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-top: 8px;
}

.section-footnote {
  font-size: 0.82rem;
  color: var(--color-text-light);
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--color-border);
}

/* ---------- 版本记录页 ---------- */
.current-version-block {
  margin-bottom: 40px;
}

.content-media {
  margin: 20px 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  padding: 12px;
}

.version-current {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-success);
  border-radius: var(--radius-md);
  padding: 24px;
}

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

.version-meta .version-number {
  font-size: 1.2rem;
}

.version-date {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-bottom: 8px;
}

.version-title {
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.version-changes {
  padding-left: 20px;
  list-style: disc;
}

.version-changes li {
  font-size: 0.9rem;
  margin-bottom: 6px;
  color: var(--color-text);
}

.version-timeline {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.version-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  transition: border-color var(--transition-base);
}

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

.version-item-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.version-item-meta .version-number {
  font-size: 0.95rem;
}

.version-date {
  font-size: 0.82rem;
  color: var(--color-text-light);
}

.version-item-desc {
  font-size: 0.88rem;
  color: var(--color-text);
  margin: 0;
}

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

.legend-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 16px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.legend-text {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin: 0;
}

/* ---------- 问题帮助页 ---------- */
.topic-anchor-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.topic-anchor {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.topic-anchor:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 12px rgba(15, 45, 61, 0.08);
}

.topic-index {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-accent);
}

.topic-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary);
}

.topic-desc {
  font-size: 0.82rem;
  color: var(--color-text-light);
}

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

.faq-topic h3 {
  font-size: 1.1rem;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-accent);
}

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

.faq-figure {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  padding: 12px;
  margin: 20px 0;
}

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

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

.next-step-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 12px rgba(15, 45, 61, 0.08);
}

.next-step-card h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.next-step-card p {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin: 0;
}

/* ---------- 关于我们页 ---------- */
.about-position-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
  align-items: start;
}

.position-text p {
  font-size: 0.95rem;
  color: var(--color-text);
  line-height: 1.8;
}

.about-figure {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  padding: 12px;
}

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

.principle-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
}

.principle-card h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.principle-card p {
  font-size: 0.88rem;
  color: var(--color-text-light);
  margin: 0;
}

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

.boundary-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
}

.boundary-item h3 {
  font-size: 0.98rem;
  margin-bottom: 6px;
}

.boundary-item p {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin: 0;
}

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

.next-links li a {
  display: block;
  padding: 14px 16px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9rem;
  text-align: center;
  transition: border-color var(--transition-base), color var(--transition-base);
}

.next-links li a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

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

.error-section {
  text-align: center;
  max-width: 560px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 4rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 12px;
}

.error-section h1 {
  font-size: 1.6rem;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 1rem;
  color: var(--color-text-light);
  margin-bottom: 24px;
}

.error-alt {
  margin-top: 16px;
  font-size: 0.9rem;
  color: var(--color-text-light);
}

.error-alt a {
  margin: 0 8px;
  font-weight: 600;
}

/* ---------- 版本记录页的页尾图片 ---------- */
.page-figure {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 24px;
}

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

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

  .side-panel,
  .sidebar-panel,
  .info-panel,
  .aside-panel {
    position: static;
    order: 2;
  }

  .scene-cards,
  .next-grid,
  .selfcheck-list,
  .topic-anchor-list,
  .next-step-list {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* 手机：768px 以下 */
@media (max-width: 768px) {
  .header-inner {
    min-height: 56px;
    padding: 0 16px;
  }

  .brand-name {
    font-size: 1.1rem;
  }

  .version-chip {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-list {
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background-color: var(--color-primary);
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    gap: 2px;
    display: none;
    z-index: 100;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
  }

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

  .nav-list li a {
    padding: 12px 16px;
    font-size: 1rem;
  }

  .layout-shell {
    padding: 24px 16px 40px;
    grid-template-columns: 1fr;
  }

  .home-main {
    padding: 0 16px 40px;
  }

  .hero-scene {
    padding: 32px 0 24px;
  }

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

  .hero-lead {
    font-size: 1rem;
  }

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

  .stage-row {
    grid-template-columns: 40px 1fr;
    gap: 8px 12px;
    padding: 12px;
  }

  .stage-num {
    font-size: 0.95rem;
  }

  .stage-desc {
    grid-column: 2;
    font-size: 0.82rem;
  }

  .stage-status {
    grid-column: 2;
    justify-self: start;
    font-size: 0.72rem;
  }

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

  .version-history li {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 12px;
  }

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

  .help-topics {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .topic-link {
    font-size: 0.85rem;
    padding: 8px 12px;
  }

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

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

  .process-timeline .process-step {
    grid-template-columns: 44px 1fr;
    gap: 10px;
    padding: 16px;
  }

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

  .capability-table {
    min-width: 560px;
  }

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

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

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

  .scenario-row {
    grid-template-columns: 80px 1fr;
    gap: 8px;
  }

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

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

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

  .topic-anchor-list {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .next-step-list {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .about-position-block {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

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

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

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

  .footer-links {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-title {
    font-size: 1.5rem;
  }

  .section-heading h2,
  .section-title {
    font-size: 1.3rem;
  }

  .version-current {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .version-date {
    margin-left: 0;
  }

  .meta-row {
    grid-template-columns: 80px 1fr;
    gap: 8px;
  }
}

/* 窄屏：480px 以下 */
@media (max-width: 480px) {
  .topic-anchor-list {
    grid-template-columns: 1fr;
  }

  .hero-cta {
    width: 100%;
  }

  .stage-row {
    grid-template-columns: 36px 1fr;
  }

  .stage-name {
    font-size: 0.9rem;
  }

  .capability-card-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .scenario-head {
    flex-wrap: wrap;
  }

  .scenario-head h3 {
    flex-basis: 100%;
  }

  .faq-item summary {
    padding: 14px 16px;
    font-size: 0.9rem;
  }

  .faq-answer {
    padding: 14px 16px;
    font-size: 0.88rem;
  }
}