/* ==========================================================================
   Base
   ========================================================================== */

*, *::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: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: #2B2F36;
  background-color: #FFF9F0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: #2E86DE;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #1F2A44;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

/* ==========================================================================
   Layout
   ========================================================================== */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

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

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

/* Header
   ========================================================================== */

.site-header {
  background-color: #FFF9F0;
  border-bottom: 1px solid #F0E6D8;
  position: relative;
  z-index: 100;
}

.header-topbar {
  background-color: #1F2A44;
  color: rgba(255, 255, 255, 0.85);
  font-size: 13px;
  padding: 6px 0;
  text-align: center;
}

.header-topbar p {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  letter-spacing: 0.01em;
}

.header-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-logo {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
  flex-shrink: 0;
}

.brand-name {
  font-size: 22px;
  font-weight: 700;
  color: #1F2A44;
  letter-spacing: 0.02em;
}

.brand-tagline {
  font-size: 12px;
  color: #8A8578;
  margin-top: 2px;
}

/* Main Nav
   ========================================================================== */

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

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border: 2px solid #1F2A44;
  border-radius: 8px;
  background-color: #FFF9F0;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: #1F2A44;
  border-radius: 2px;
}

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

.nav-list li a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: #2B2F36;
  border-radius: 6px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-list li a:hover {
  background-color: #F5EBDD;
  color: #1F2A44;
}

.nav-list li a.is-current {
  background-color: #1F2A44;
  color: #FFF9F0;
  font-weight: 600;
}

/* Breadcrumb
   ========================================================================== */

.breadcrumb {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px 0;
  font-size: 14px;
  color: #8A8578;
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb a {
  color: #8A8578;
}

.breadcrumb a:hover {
  color: #2E86DE;
}

.breadcrumb-sep {
  color: #C4BBAE;
}

.breadcrumb-current {
  color: #2B2F36;
  font-weight: 500;
}

/* Page Header
   ========================================================================== */

.page-header {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 24px 0;
}

.page-header .page-title {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.4;
  color: #1F2A44;
  margin: 0;
}

/* Footer
   ========================================================================== */

.site-footer {
  background-color: #1F2A44;
  color: rgba(255, 255, 255, 0.8);
  margin-top: 64px;
  flex-shrink: 0;
}

.footer-columns {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.footer-col h3 {
  font-size: 16px;
  font-weight: 600;
  color: #FFF9F0;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  transition: color 0.2s ease;
}

.footer-col ul li a:hover {
  color: #FF9F1C;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding: 20px 24px;
  text-align: center;
}

.footer-bottom p {
  max-width: 1200px;
  margin: 0 auto;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

/* ==========================================================================
   Components
   ========================================================================== */

/* Buttons
   ========================================================================== */

.btn-primary {
  display: inline-block;
  padding: 12px 28px;
  background-color: #FF9F1C;
  color: #1F2A44;
  font-size: 15px;
  font-weight: 600;
  border: 2px solid #1F2A44;
  border-radius: 8px;
  transition: background-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
  text-align: center;
}

.btn-primary:hover {
  background-color: #F5A623;
  color: #1F2A44;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(31, 42, 68, 0.15);
}

.btn-secondary {
  display: inline-block;
  padding: 12px 28px;
  background-color: transparent;
  color: #1F2A44;
  font-size: 15px;
  font-weight: 500;
  border: 2px solid #1F2A44;
  border-radius: 8px;
  transition: background-color 0.2s ease, transform 0.2s ease;
  text-align: center;
}

.btn-secondary:hover {
  background-color: #1F2A44;
  color: #FFF9F0;
  transform: translateY(-2px);
}

.btn-text {
  display: inline-block;
  padding: 8px 0;
  color: #2E86DE;
  font-size: 15px;
  font-weight: 500;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.btn-text:hover {
  color: #1F2A44;
  border-bottom-color: #1F2A44;
}

/* Section Title
   ========================================================================== */

.section-title {
  font-size: 24px;
  font-weight: 700;
  line-height: 1.5;
  color: #1F2A44;
  margin-bottom: 8px;
}

.section-intro {
  font-size: 15px;
  color: #6B6F76;
  margin-bottom: 28px;
  max-width: 720px;
}

/* FAQ
   ========================================================================== */

.faq-item {
  border: 2px solid #E8DECD;
  border-radius: 8px;
  background-color: #FFFFFF;
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.faq-item:hover {
  border-color: #C4BBAE;
}

.faq-item summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: #1F2A44;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  user-select: none;
}

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

.faq-item summary::after {
  content: '+';
  font-size: 22px;
  font-weight: 400;
  color: #FF9F1C;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

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

.faq-item p {
  padding: 0 20px 16px;
  font-size: 15px;
  color: #4A4F57;
  line-height: 1.7;
}

/* Related Links
   ========================================================================== */

.related-links {
  max-width: 1200px;
  margin: 48px auto 0;
  padding: 24px;
}

.related-links-label {
  font-size: 15px;
  font-weight: 600;
  color: #1F2A44;
  margin-right: 16px;
}

.related-links-item {
  display: inline-block;
  margin-right: 16px;
  font-size: 14px;
  color: #2E86DE;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.related-links-item:hover {
  color: #1F2A44;
  border-bottom-color: #1F2A44;
}

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

.related-card {
  display: block;
  padding: 20px;
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 8px;
  transition: box-shadow 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.related-card:hover {
  border-color: #FF9F1C;
  box-shadow: 0 4px 16px rgba(31, 42, 68, 0.08);
  transform: translateY(-2px);
}

.related-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: #1F2A44;
  margin-bottom: 8px;
}

.related-card p {
  font-size: 14px;
  color: #6B6F76;
  line-height: 1.6;
}

/* ==========================================================================
   Pages
   ========================================================================== */

/* Homepage
   ========================================================================== */

.home-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

/* Hero Workbench */

.hero-workbench {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 48px 0 56px;
}

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

.hero-eyebrow {
  display: inline-block;
  padding: 4px 12px;
  background-color: #FF9F1C;
  color: #1F2A44;
  font-size: 13px;
  font-weight: 600;
  border-radius: 4px;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.hero-copy h1 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.4;
  color: #1F2A44;
  margin-bottom: 12px;
}

.hero-slogan {
  font-size: 18px;
  font-weight: 500;
  color: #1F2A44;
  margin-bottom: 12px;
}

.hero-desc {
  font-size: 15px;
  color: #6B6F76;
  line-height: 1.75;
  margin-bottom: 24px;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

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

.hero-tags li {
  font-size: 13px;
  color: #4A4F57;
  background-color: #F5EBDD;
  padding: 4px 12px;
  border-radius: 4px;
  border: 1px solid #E8DECD;
}

.hero-visual {
  position: relative;
}

.hero-figure {
  background-color: #1F2A44;
  border-radius: 8px;
  overflow: hidden;
  border: 2px solid #1F2A44;
}

.hero-figure img {
  width: 100%;
  height: 340px;
  object-fit: cover;
}

.hero-figure figcaption {
  padding: 12px 16px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.8);
  background-color: #1F2A44;
}

.hero-flow-labels {
  position: absolute;
  bottom: 56px;
  left: 16px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.hero-flow-labels span {
  display: inline-block;
  background-color: #FF9F1C;
  color: #1F2A44;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 4px;
  border: 2px solid #1F2A44;
  white-space: nowrap;
}

/* Service Logic Strip */

.service-logic-strip {
  padding: 48px 0;
  border-top: 1px solid #F0E6D8;
}

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

.logic-step {
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 8px;
  padding: 24px;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.logic-step:hover {
  border-color: #FF9F1C;
  box-shadow: 0 4px 16px rgba(31, 42, 68, 0.08);
}

.step-num {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: #2E86DE;
  margin-bottom: 8px;
}

.logic-step h3 {
  font-size: 16px;
  font-weight: 600;
  color: #1F2A44;
  margin-bottom: 8px;
}

.logic-step p {
  font-size: 14px;
  color: #6B6F76;
  line-height: 1.6;
}

/* Section Entry Grid */

.section-entry-grid {
  padding: 48px 0;
}

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

.entry-card {
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 8px;
  overflow: hidden;
  transition: box-shadow 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.entry-card:hover {
  border-color: #FF9F1C;
  box-shadow: 0 4px 16px rgba(31, 42, 68, 0.08);
  transform: translateY(-2px);
}

.entry-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-bottom: 2px solid #E8DECD;
}

.entry-card-body {
  padding: 20px;
}

.entry-card-body h3 {
  font-size: 16px;
  font-weight: 600;
  color: #1F2A44;
  margin-bottom: 8px;
}

.entry-card-body p {
  font-size: 14px;
  color: #6B6F76;
  line-height: 1.6;
  margin-bottom: 12px;
}

.entry-card-body a {
  font-size: 14px;
  font-weight: 500;
  color: #2E86DE;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.entry-card-body a:hover {
  color: #1F2A44;
  border-bottom-color: #1F2A44;
}

/* Term Preview */

.term-preview-section {
  padding: 48px 0;
}

.term-preview-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

.term-preview-item {
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 8px;
  padding: 20px;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.term-preview-item:hover {
  border-color: #FF9F1C;
  box-shadow: 0 4px 16px rgba(31, 42, 68, 0.08);
}

.term-preview-item h3 {
  font-size: 17px;
  font-weight: 600;
  color: #1F2A44;
  margin-bottom: 8px;
}

.term-preview-item p {
  font-size: 14px;
  color: #6B6F76;
  line-height: 1.6;
  margin-bottom: 12px;
}

.term-preview-item a {
  font-size: 14px;
  color: #2E86DE;
  font-weight: 500;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.term-preview-item a:hover {
  color: #1F2A44;
  border-bottom-color: #1F2A44;
}

/* Cooperation Preview */

.cooperation-preview {
  padding: 48px 0;
}

.coop-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.coop-step {
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 8px;
  padding: 20px;
  text-align: center;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.coop-step:hover {
  border-color: #FF9F1C;
  box-shadow: 0 4px 16px rgba(31, 42, 68, 0.08);
}

.coop-step h3 {
  font-size: 16px;
  font-weight: 600;
  color: #1F2A44;
  margin-bottom: 8px;
}

.coop-step p {
  font-size: 14px;
  color: #6B6F76;
  line-height: 1.6;
}

.cooperation-preview .btn-primary {
  display: inline-block;
}

/* Home FAQ */

.home-faq {
  padding: 48px 0;
}

.faq-list {
  max-width: 800px;
}

/* Boundary Note */

.boundary-note {
  padding: 24px 0 48px;
}

.boundary-note p {
  font-size: 14px;
  color: #8A8578;
  background-color: #F5EBDD;
  border-left: 4px solid #FF9F1C;
  padding: 12px 16px;
  border-radius: 0 4px 4px 0;
  line-height: 1.6;
}

/* ==========================================================================
   Inner Pages
   ========================================================================== */

.inner-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

/* Page Title Sections (inner pages) */

.page-title {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.4;
  color: #1F2A44;
  margin: 0;
  padding: 24px 0 8px;
}

.page-title p {
  font-size: 15px;
  color: #6B6F76;
  line-height: 1.7;
  font-weight: 400;
  margin-top: 8px;
}

.page-intro {
  font-size: 15px;
  color: #6B6F76;
  line-height: 1.7;
  padding: 0 0 24px;
  max-width: 720px;
}

.page-title-area {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 24px 0;
}

.page-title-area p {
  font-size: 15px;
  color: #6B6F76;
  line-height: 1.7;
  margin-top: 8px;
}

.page-title-block {
  padding: 24px 0 8px;
}

.page-lead {
  font-size: 15px;
  color: #6B6F76;
  line-height: 1.7;
  max-width: 720px;
}

/* ==========================================================================
   Jichu Gainian (基础概念)
   ========================================================================== */

.layout-shell.concept-layout {
  padding: 24px 0 48px;
}

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 40px;
  align-items: start;
}

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

.aside-toc {
  position: sticky;
  top: 24px;
}

.toc-box {
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
}

.toc-box h2 {
  font-size: 16px;
  font-weight: 600;
  color: #1F2A44;
  margin-bottom: 12px;
}

.toc-box ul li {
  margin-bottom: 8px;
}

.toc-box ul li a {
  font-size: 14px;
  color: #2E86DE;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.toc-box ul li a:hover {
  color: #1F2A44;
  border-bottom-color: #1F2A44;
}

.aside-figure {
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 8px;
  overflow: hidden;
}

.aside-figure img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.aside-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: #8A8578;
  background-color: #F5EBDD;
  line-height: 1.5;
}

/* Concept Cards */

.concept-cards {
  padding: 24px 0;
}

.section-desc {
  font-size: 15px;
  color: #6B6F76;
  margin-bottom: 24px;
  max-width: 720px;
}

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

.concept-card {
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 8px;
  padding: 24px;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.concept-card:hover {
  border-color: #FF9F1C;
  box-shadow: 0 4px 16px rgba(31, 42, 68, 0.08);
}

.concept-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: #1F2A44;
  margin-bottom: 8px;
}

.concept-def {
  font-size: 15px;
  color: #4A4F57;
  line-height: 1.7;
  margin-bottom: 12px;
}

.concept-scene {
  font-size: 14px;
  color: #6B6F76;
  line-height: 1.6;
  margin-bottom: 12px;
  padding-left: 12px;
  border-left: 3px solid #FF9F1C;
}

.concept-check {
  font-size: 14px;
  color: #2E86DE;
  line-height: 1.6;
  background-color: #F0F7FF;
  padding: 8px 12px;
  border-radius: 4px;
}

/* Distinction Table */

.distinction-section {
  padding: 24px 0;
}

.distinction-group {
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 20px;
}

.distinction-group h3 {
  font-size: 16px;
  font-weight: 600;
  color: #1F2A44;
  margin-bottom: 12px;
}

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

.compare-table th,
.compare-table td {
  padding: 10px 12px;
  font-size: 14px;
  line-height: 1.6;
  text-align: left;
  border-bottom: 1px solid #F0E6D8;
  vertical-align: top;
}

.compare-table th {
  font-weight: 600;
  color: #1F2A44;
  background-color: #F5EBDD;
  width: 30%;
}

.compare-table td:last-child {
  color: #4A4F57;
}

/* Related Section */

.related-section {
  padding: 24px 0;
}

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

.related-list li a {
  display: block;
  padding: 14px 16px;
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 8px;
  font-size: 14px;
  color: #2E86DE;
  font-weight: 500;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.related-list li a:hover {
  border-color: #FF9F1C;
  box-shadow: 0 4px 16px rgba(31, 42, 68, 0.08);
  color: #1F2A44;
}

/* ==========================================================================
   Gongju Shuoming (工具说明)
   ========================================================================== */

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

.tabs-header {
  display: flex;
  gap: 8px;
  border-bottom: 2px solid #E8DECD;
  padding-bottom: 0;
  margin-bottom: 24px;
}

.tab-btn {
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 500;
  color: #6B6F76;
  background-color: transparent;
  border: 2px solid transparent;
  border-bottom: none;
  border-radius: 8px 8px 0 0;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  cursor: pointer;
}

.tab-btn:hover {
  color: #1F2A44;
  background-color: #F5EBDD;
}

.tab-btn.is-active {
  color: #1F2A44;
  font-weight: 600;
  background-color: #FFFFFF;
  border-color: #E8DECD;
  border-bottom: 2px solid #FFFFFF;
  margin-bottom: -2px;
}

.tool-guide-panel {
  display: none;
}

.tool-guide-panel.is-active {
  display: block;
}

.tool-guide {
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 8px;
  padding: 32px;
}

.tool-guide h2 {
  font-size: 20px;
  font-weight: 600;
  color: #1F2A44;
  margin-bottom: 24px;
}

.guide-block {
  padding: 20px;
  background-color: #FFF9F0;
  border-left: 4px solid #2E86DE;
  border-radius: 0 8px 8px 0;
  margin-bottom: 16px;
}

.guide-block h3 {
  font-size: 16px;
  font-weight: 600;
  color: #1F2A44;
  margin-bottom: 8px;
}

.guide-block p {
  font-size: 15px;
  color: #4A4F57;
  line-height: 1.7;
}

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

.guide-list li {
  font-size: 14px;
  color: #4A4F57;
  line-height: 1.7;
  margin-bottom: 6px;
  padding-left: 4px;
}

.deviation-tip {
  background-color: #FFF5F5;
  border: 2px solid #EF6C57;
  border-radius: 8px;
  padding: 20px;
  margin-top: 24px;
}

.deviation-tip h3 {
  font-size: 15px;
  font-weight: 600;
  color: #EF6C57;
  margin-bottom: 12px;
}

.deviation-tip ul {
  padding-left: 20px;
  list-style: disc;
}

.deviation-tip ul li {
  font-size: 14px;
  color: #4A4F57;
  line-height: 1.7;
  margin-bottom: 6px;
}

.tool-image-figure {
  margin: 24px 0;
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 8px;
  overflow: hidden;
}

.tool-image-figure img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.tool-image-figure figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: #8A8578;
  background-color: #F5EBDD;
  line-height: 1.5;
}

.fixed-tips {
  background-color: #1F2A44;
  border-radius: 8px;
  padding: 24px;
  margin: 24px 0;
}

.fixed-tips h2 {
  font-size: 16px;
  font-weight: 600;
  color: #FFF9F0;
  margin-bottom: 8px;
}

.fixed-tips p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.7;
}

.fixed-tips p a {
  color: #FF9F1C;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.fixed-tips p a:hover {
  border-bottom-color: #FF9F1C;
}

/* ==========================================================================
   Fengxian Tishi (风险提示)
   ========================================================================== */

.intro {
  font-size: 15px;
  color: #6B6F76;
  line-height: 1.7;
  padding: 0 0 24px;
  max-width: 720px;
}

.risk-list {
  padding: 24px 0;
}

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

.risk-card {
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 8px;
  padding: 24px;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.risk-card:hover {
  border-color: #FF9F1C;
  box-shadow: 0 4px 16px rgba(31, 42, 68, 0.08);
}

.risk-card-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.risk-level {
  display: inline-block;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 4px;
  white-space: nowrap;
}

.level-high {
  background-color: #EF6C57;
  color: #FFFFFF;
}

.level-medium {
  background-color: #FF9F1C;
  color: #1F2A44;
}

.risk-card-head h3 {
  font-size: 17px;
  font-weight: 600;
  color: #1F2A44;
}

.risk-scene {
  font-size: 14px;
  color: #4A4F57;
  line-height: 1.6;
  margin-bottom: 12px;
}

.risk-scene strong {
  color: #1F2A44;
  font-weight: 600;
}

.risk-features {
  padding-left: 20px;
  list-style: disc;
}

.risk-features li {
  font-size: 14px;
  color: #6B6F76;
  line-height: 1.6;
  margin-bottom: 6px;
}

.risk-figure {
  margin: 24px 0;
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 8px;
  overflow: hidden;
}

.risk-figure img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.risk-figure figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: #8A8578;
  background-color: #F5EBDD;
  line-height: 1.5;
}

.response-table {
  padding: 24px 0;
}

.table-wrap {
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 8px;
  overflow: hidden;
  overflow-x: auto;
}

.table-wrap table {
  width: 100%;
  border-collapse: collapse;
  min-width: 600px;
}

.table-wrap th,
.table-wrap td {
  padding: 14px 16px;
  font-size: 14px;
  line-height: 1.6;
  text-align: left;
  vertical-align: top;
}

.table-wrap thead th {
  background-color: #1F2A44;
  color: #FFF9F0;
  font-weight: 600;
}

.table-wrap tbody tr:nth-child(odd) {
  background-color: #FFF9F0;
}

.table-wrap tbody tr:nth-child(even) {
  background-color: #FFFFFF;
}

.table-wrap tbody td:first-child {
  font-weight: 500;
  color: #1F2A44;
}

.table-wrap tbody td:last-child {
  color: #4A4F57;
}

.notice {
  background-color: #F5EBDD;
  border-left: 4px solid #FF9F1C;
  padding: 16px 20px;
  border-radius: 0 8px 8px 0;
  margin: 24px 0;
}

.notice p {
  font-size: 14px;
  color: #6B6F76;
  line-height: 1.6;
}

/* ==========================================================================
   Anli Jiedu (案例解读)
   ========================================================================== */

.filters {
  padding: 24px 0 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: flex-start;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.filter-label {
  font-size: 14px;
  font-weight: 600;
  color: #1F2A44;
}

.filter-options {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 8px 16px;
  font-size: 14px;
  color: #4A4F57;
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 6px;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  cursor: pointer;
}

.filter-btn:hover {
  border-color: #FF9F1C;
  color: #1F2A44;
}

.filter-btn.is-active {
  background-color: #1F2A44;
  color: #FFF9F0;
  border-color: #1F2A44;
  font-weight: 500;
}

.result-count {
  font-size: 14px;
  color: #6B6F76;
  padding: 8px 0 16px;
}

.result-count strong {
  color: #1F2A44;
  font-weight: 600;
}

.case-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  padding: 16px 0;
}

.case-card {
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 8px;
  overflow: hidden;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.case-card:hover {
  border-color: #FF9F1C;
  box-shadow: 0 4px 16px rgba(31, 42, 68, 0.08);
}

.case-stage {
  padding: 12px 16px;
  background-color: #F5EBDD;
  border-bottom: 2px solid #E8DECD;
}

.stage-tag {
  display: inline-block;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 600;
  background-color: #FF9F1C;
  color: #1F2A44;
  border-radius: 4px;
}

.case-content {
  padding: 20px;
}

.case-content h2 {
  font-size: 17px;
  font-weight: 600;
  color: #1F2A44;
  margin-bottom: 16px;
}

.case-timeline {
  margin-bottom: 16px;
}

.timeline-item {
  display: flex;
  gap: 12px;
  margin-bottom: 8px;
  align-items: flex-start;
}

.timeline-time {
  font-size: 13px;
  font-weight: 600;
  color: #2E86DE;
  white-space: nowrap;
  min-width: 56px;
  padding-top: 2px;
}

.timeline-desc {
  font-size: 14px;
  color: #4A4F57;
  line-height: 1.6;
}

.case-action {
  background-color: #FFF9F0;
  border-radius: 6px;
  padding: 12px;
}

.case-action h3 {
  font-size: 14px;
  font-weight: 600;
  color: #1F2A44;
  margin-bottom: 6px;
}

.case-action p {
  font-size: 14px;
  color: #4A4F57;
  line-height: 1.6;
}

.case-tip {
  font-size: 13px;
  color: #2E86DE;
  margin-top: 8px;
  line-height: 1.6;
}

.case-figure {
  margin: 24px 0;
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 8px;
  overflow: hidden;
}

.case-figure img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.case-figure figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: #8A8578;
  background-color: #F5EBDD;
  line-height: 1.5;
}

.related {
  padding: 24px 0;
}

.related h2 {
  font-size: 20px;
  font-weight: 600;
  color: #1F2A44;
  margin-bottom: 16px;
}

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

.related-links a {
  display: inline-block;
  padding: 10px 20px;
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 6px;
  font-size: 14px;
  color: #2E86DE;
  font-weight: 500;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.related-links a:hover {
  border-color: #FF9F1C;
  color: #1F2A44;
}

/* ==========================================================================
   Shuyu Suoyin (术语索引)
   ========================================================================== */

.term-index-wrap {
  padding: 24px 0;
}

.filter-bar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.filter-bar .filter-btn {
  padding: 10px 20px;
}

.term-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  padding: 16px 0;
}

.term-item {
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 8px;
  padding: 20px;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.term-item:hover {
  border-color: #FF9F1C;
  box-shadow: 0 4px 16px rgba(31, 42, 68, 0.08);
}

.term-item h2 {
  font-size: 17px;
  font-weight: 600;
  color: #1F2A44;
  margin-bottom: 8px;
}

.term-def {
  font-size: 15px;
  color: #4A4F57;
  line-height: 1.7;
  margin-bottom: 8px;
}

.term-scene {
  font-size: 14px;
  color: #6B6F76;
  line-height: 1.6;
  margin-bottom: 12px;
  padding-left: 12px;
  border-left: 3px solid #FF9F1C;
}

.term-link {
  font-size: 14px;
  color: #2E86DE;
  font-weight: 500;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.term-link:hover {
  color: #1F2A44;
  border-bottom-color: #1F2A44;
}

.pagination {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 24px 0;
  justify-content: center;
}

.page-prev,
.page-next,
.page-number,
.page-current {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  font-size: 14px;
  border-radius: 6px;
  border: 2px solid #E8DECD;
  background-color: #FFFFFF;
  color: #4A4F57;
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

.page-prev:hover,
.page-next:hover,
.page-number:hover {
  border-color: #FF9F1C;
  color: #1F2A44;
}

.page-current {
  background-color: #1F2A44;
  color: #FFF9F0;
  border-color: #1F2A44;
  font-weight: 600;
}

.page-prev.is-disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.relation-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  padding: 32px 0;
}

.relation-copy h2 {
  font-size: 20px;
  font-weight: 600;
  color: #1F2A44;
  margin-bottom: 12px;
}

.relation-copy p {
  font-size: 15px;
  color: #4A4F57;
  line-height: 1.7;
  margin-bottom: 12px;
}

.relation-figure {
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 8px;
  overflow: hidden;
}

.relation-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.relation-figure figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: #8A8578;
  background-color: #F5EBDD;
  line-height: 1.5;
}

/* ==========================================================================
   Hezuo Zixun (合作咨询)
   ========================================================================== */

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

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

.boundary-card {
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 8px;
  padding: 24px;
}

.boundary-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: #1F2A44;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid #E8DECD;
}

.boundary-card ul li {
  font-size: 14px;
  color: #4A4F57;
  line-height: 1.7;
  padding-left: 20px;
  position: relative;
  margin-bottom: 10px;
}

.boundary-card ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.boundary-card.can-do ul li::before {
  background-color: #2E86DE;
}

.boundary-card.cannot-do ul li::before {
  background-color: #EF6C57;
}

.cooperation-steps {
  padding: 24px 0;
}

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

.step-card {
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 8px;
  padding: 24px;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.step-card:hover {
  border-color: #FF9F1C;
  box-shadow: 0 4px 16px rgba(31, 42, 68, 0.08);
}

.step-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: #1F2A44;
  margin-bottom: 12px;
}

.step-card p {
  font-size: 14px;
  color: #6B6F76;
  line-height: 1.7;
  margin-bottom: 8px;
}

.step-card p strong {
  color: #1F2A44;
  font-weight: 600;
}

.prep-list {
  padding: 24px 0;
}

.check-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  max-width: 800px;
}

.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 6px;
  padding: 14px 16px;
  font-size: 14px;
  color: #4A4F57;
  line-height: 1.6;
  transition: border-color 0.2s ease;
}

.check-list li:hover {
  border-color: #FF9F1C;
}

.check-box {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid #2E86DE;
  border-radius: 4px;
  flex-shrink: 0;
  margin-top: 2px;
}

.scene-figure {
  margin: 24px 0;
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 8px;
  overflow: hidden;
}

.scene-figure img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.scene-figure figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: #8A8578;
  background-color: #F5EBDD;
  line-height: 1.5;
}

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

.faq-section h2 {
  font-size: 20px;
  font-weight: 600;
  color: #1F2A44;
  margin-bottom: 16px;
}

.privacy-note {
  background-color: #1F2A44;
  border-radius: 8px;
  padding: 24px;
  margin: 24px 0;
}

.privacy-note h2 {
  font-size: 16px;
  font-weight: 600;
  color: #FFF9F0;
  margin-bottom: 8px;
}

.privacy-note p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.7;
}

/* ==========================================================================
   404 Page
   ========================================================================== */

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

.error-panel {
  background-color: #FFFFFF;
  border: 2px solid #E8DECD;
  border-radius: 8px;
  padding: 48px;
  text-align: center;
  max-width: 520px;
  width: 100%;
}

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: #FF9F1C;
  line-height: 1;
  margin-bottom: 16px;
}

.error-panel h1 {
  font-size: 24px;
  font-weight: 600;
  color: #1F2A44;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: #6B6F76;
  line-height: 1.7;
  margin-bottom: 24px;
}

.error-btn {
  display: inline-block;
  padding: 12px 28px;
  background-color: #1F2A44;
  color: #FFF9F0;
  font-size: 15px;
  font-weight: 600;
  border-radius: 8px;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.error-btn:hover {
  background-color: #2E86DE;
  color: #FFFFFF;
  transform: translateY(-2px);
}

.error-help {
  font-size: 14px;
  color: #8A8578;
  margin-top: 16px;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1024px) {
  .hero-workbench {
    gap: 32px;
  }

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

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

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

  .related-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

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

@media (max-width: 768px) {
  .header-main {
    flex-wrap: wrap;
    gap: 12px;
  }

  .nav-toggle {
    display: flex;
    margin-left: auto;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    width: 100%;
    gap: 0;
    padding: 12px 0;
    border-top: 2px solid #E8DECD;
  }

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

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

  .nav-list li a {
    padding: 12px 16px;
    border-radius: 6px;
  }

  .nav-list li a.is-current {
    background-color: #1F2A44;
    color: #FFF9F0;
  }

  .hero-workbench {
    grid-template-columns: 1fr;
    padding: 32px 0;
  }

  .hero-visual {
    order: 2;
  }

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

  .hero-flow-labels {
    bottom: 48px;
  }

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

  .aside-toc {
    position: static;
    order: 3;
  }

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

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

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

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

  .relation-section {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .footer-columns {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .tabs-header {
    flex-direction: column;
    gap: 0;
    border-bottom: none;
  }

  .tab-btn {
    border-radius: 6px;
    border: 2px solid #E8DECD;
    margin-bottom: 8px;
  }

  .tab-btn.is-active {
    border-color: #1F2A44;
    background-color: #1F2A44;
    color: #FFF9F0;
    margin-bottom: 8px;
  }

  .tool-guide {
    padding: 24px;
  }
}

@media (max-width: 480px) {
  .container,
  .header-main,
  .breadcrumb,
  .page-header,
  .inner-main,
  .home-main {
    padding-left: 16px;
    padding-right: 16px;
  }

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

  .brand-tagline {
    font-size: 11px;
  }

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

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

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

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

  .entry-cards {
    grid-template-columns: 1fr;
  }

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

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

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

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

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

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

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

  .filters {
    flex-direction: column;
    gap: 16px;
  }

  .filter-options {
    flex-wrap: wrap;
  }

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

  .section-title {
    font-size: 20px;
  }

  .tool-guide {
    padding: 16px;
  }

  .guide-block {
    padding: 14px;
  }

  .deviation-tip {
    padding: 14px;
  }

  .error-panel {
    padding: 32px 20px;
  }

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

/* 程序验收反馈：修复网格孤项 */
@media (min-width: 769px) {
  .related-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}