/* roulang page: index */
:root {
  --color-primary: #2F6BB3;
  --color-primary-dark: #1E4E8F;
  --color-primary-light: #EAF1FA;
  --color-accent: #E8862E;
  --color-accent-dark: #C96F1A;
  --color-bg: #F7F9FC;
  --color-surface: #FFFFFF;
  --color-text: #25344D;
  --color-text-secondary: #5B6B82;
  --color-border: #E1E8F0;
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-neutral: #94A3B8;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.5rem;
  --text-5xl: 3rem;
  --space-section: 6rem;
  --space-card-padding: 1.5rem;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-pill: 50px;
  --shadow-card: 0 4px 16px rgba(31, 64, 110, 0.08);
  --shadow-card-hover: 0 8px 28px rgba(31, 64, 110, 0.14);
  --bs-gutter-x: 24px;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  font-size: var(--text-base);
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--color-primary); text-decoration: none; transition: color 0.25s ease; }
a:hover { color: var(--color-primary-dark); }
img { max-width: 100%; height: auto; }

.container { max-width: 1200px; padding-left: 24px; padding-right: 24px; }

.section { padding: var(--space-section) 0; }
.section-header { margin-bottom: 3rem; }
.section-header .section-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}
.section-header .section-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* ==== 按钮 ==== */
.btn-accent,
.btn-brand,
.btn-outline-brand {
  border-radius: var(--radius-pill);
  padding: 0.75rem 2rem;
  font-weight: 600;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: none;
  line-height: 1.4;
}
.btn-accent {
  background: var(--color-accent);
  color: #fff !important;
}
.btn-accent:hover {
  background: var(--color-accent-dark);
  color: #fff !important;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(232, 134, 46, 0.25);
}
.btn-accent:focus {
  outline: 2px solid rgba(232, 134, 46, 0.4);
  outline-offset: 2px;
}
.btn-brand {
  background: var(--color-primary);
  color: #fff !important;
}
.btn-brand:hover {
  background: var(--color-primary-dark);
  color: #fff !important;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(47, 107, 179, 0.25);
}
.btn-outline-brand {
  border: 1.5px solid var(--color-primary);
  color: var(--color-primary) !important;
  background: transparent;
}
.btn-outline-brand:hover {
  background: var(--color-primary-light);
  color: var(--color-primary) !important;
  transform: translateY(-2px);
}

/* ==== 导航 ==== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow 0.3s ease;
}
.site-header.scrolled { box-shadow: var(--shadow-card); }
.navbar { padding: 0; min-height: 72px; }
.navbar-brand { display: flex; align-items: center; padding: 0; margin-right: 2rem; }
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  border-radius: 10px;
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: -0.02em;
  margin-right: 10px;
  box-shadow: 0 2px 8px rgba(47, 107, 179, 0.25);
}
.brand-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.01em;
}
.navbar-nav { gap: 0.5rem; }
.nav-link-custom {
  font-size: 0.9375rem;
  color: var(--color-text-secondary) !important;
  padding: 1.25rem 1rem !important;
  position: relative;
  font-weight: 500;
  transition: color 0.25s ease;
}
.nav-link-custom:hover,
.nav-link-custom.active { color: var(--color-primary) !important; }
.nav-link-custom::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 4px;
  border-radius: 2px;
  background: var(--color-primary);
  transition: width 0.3s ease;
}
.nav-link-custom:hover::after,
.nav-link-custom.active::after { width: 24px; }
.nav-actions { display: flex; align-items: center; gap: 1rem; margin-left: 1.5rem; }
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-pill);
  white-space: nowrap;
}
.status-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
  animation: dot-pulse 1.8s ease-in-out infinite;
}
@keyframes dot-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}
.navbar-toggler {
  border: none;
  color: var(--color-text);
  font-size: 1.25rem;
  padding: 0.5rem;
}
.navbar-toggler:focus { box-shadow: none; outline: 2px solid rgba(47, 107, 179, 0.3); }

/* ==== Hero ==== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #F0F5FC 0%, #EAF1FA 100%);
  padding: calc(72px + 3rem) 0 4rem;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  opacity: 0.12;
  pointer-events: none;
}
.hero::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -80px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: rgba(47, 107, 179, 0.05);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -60px;
  left: -40px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: rgba(232, 134, 46, 0.04);
  pointer-events: none;
}
.hero-content { position: relative; z-index: 2; }
.hero-title {
  font-size: var(--text-5xl);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  max-width: 760px;
}
.hero-title .text-brand { color: var(--color-primary); }
.hero-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 520px;
  margin-bottom: 2.5rem;
  line-height: 1.6;
}
.hero-cta { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-top: 4rem;
  padding-top: 2.5rem;
  border-top: 1px solid rgba(47, 107, 179, 0.12);
}
.hero-stat .stat-number {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}
.hero-stat .stat-number span { font-size: var(--text-base); font-weight: 600; }
.hero-stat .stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-top: 0.25rem;
}

/* ==== 流程 ==== */
.process-section { background: var(--color-bg); }
.process-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-card-padding);
  box-shadow: var(--shadow-card);
  position: relative;
  height: 100%;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  border: 1px solid transparent;
}
.process-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(47, 107, 179, 0.15);
}
.process-num {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-primary);
  opacity: 0.25;
  position: absolute;
  top: 1rem;
  right: 1.25rem;
  line-height: 1;
}
.process-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 1.25rem;
}
.process-card h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}
.process-card p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 0;
}
.process-step-line {
  position: absolute;
  top: 50%;
  right: -24px;
  width: 24px;
  border-top: 1px dashed var(--color-border);
  z-index: 1;
}
@media (min-width: 992px) {
  .process-card:not(:last-child) .process-step-line { display: block; }
}
@media (max-width: 991px) {
  .process-step-line { display: none; }
}

/* ==== 权益 ==== */
.benefit-section { background: var(--color-surface); }
.benefit-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid transparent;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
}
.benefit-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(47, 107, 179, 0.2);
}
.benefit-card .benefit-img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
  background: var(--color-primary-light);
}
.benefit-card .benefit-body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.benefit-card h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}
.benefit-card p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 1rem;
  flex: 1;
}
.benefit-tag {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 0.25rem 0.85rem;
  border-radius: var(--radius-pill);
}

/* ==== 任务进度 ==== */
.progress-section { background: var(--color-bg); }
.progress-box {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-card);
  height: 100%;
}
.progress-tracker { display: flex; gap: 8px; margin-bottom: 1.5rem; }
.progress-segment {
  flex: 1;
  height: 8px;
  border-radius: 4px;
  background: var(--color-border);
  transition: background 0.3s ease;
}
.progress-segment.completed { background: var(--color-primary); }
.progress-segment.current {
  background: transparent;
  border: 2px solid var(--color-primary);
  animation: pulse-glow 1.5s ease-in-out infinite;
}
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 4px rgba(47, 107, 179, 0.3); }
  50% { box-shadow: 0 0 14px rgba(47, 107, 179, 0.55); }
}
.progress-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}
.progress-label .stage-name { font-weight: 600; color: var(--color-text); }
.progress-label .stage-percent { font-size: var(--text-sm); color: var(--color-primary); font-weight: 600; }
.task-list { display: flex; flex-direction: column; gap: 0.75rem; }
.task-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 0.875rem 1.25rem;
  box-shadow: var(--shadow-card);
  border: 1px solid transparent;
  transition: box-shadow 0.25s ease;
}
.task-item:hover { box-shadow: var(--shadow-card-hover); }
.task-status {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6875rem;
  color: #fff;
  flex-shrink: 0;
}
.task-status.done { background: var(--color-success); }
.task-status.doing { background: var(--color-warning); }
.task-status.todo { background: var(--color-neutral); }
.task-title {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  flex: 1;
}
.task-badge {
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}
.task-badge.done { background: var(--color-success); color: #fff; }
.task-badge.doing { background: var(--color-warning); color: #fff; }
.task-badge.todo { background: var(--color-border); color: var(--color-text-secondary); }
.progress-cta { text-align: center; margin-top: 2.5rem; }

/* ==== 最新信息 ==== */
.latest-section { background: var(--color-surface); }
.article-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
  height: 100%;
  display: flex;
  flex-direction: column;
  border: 1px solid transparent;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(47, 107, 179, 0.15);
}
.article-card .tag {
  display: inline-flex;
  align-items: center;
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 0.2rem 0.75rem;
  border-radius: var(--radius-pill);
  margin-bottom: 0.75rem;
  align-self: flex-start;
}
.article-card .article-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.4;
  margin-bottom: 0.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.8em;
}
.article-card .article-title a { color: inherit; }
.article-card .article-title a:hover { color: var(--color-primary); }
.article-card .article-excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}
.article-card .article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--color-border);
  padding-top: 0.875rem;
  font-size: var(--text-xs);
  color: var(--color-neutral);
}
.article-card .article-meta .read-more {
  font-weight: 600;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.25s ease;
}
.article-card .article-meta .read-more:hover { gap: 10px; color: var(--color-primary-dark); }

.empty-state {
  text-align: center;
  padding: 3.5rem 2rem;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px dashed var(--color-border);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}
.empty-state i {
  font-size: 2.5rem;
  color: var(--color-neutral);
  margin-bottom: 1rem;
  display: block;
}
.empty-state p { margin-bottom: 0; }

/* ==== FAQ ==== */
.faq-section { background: var(--color-bg); }
.faq-sidebar .faq-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}
.faq-sidebar p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: 1.25rem;
}
.faq-sidebar .faq-contact {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
}
.faq-sidebar .faq-contact:hover { color: var(--color-primary-dark); }
.faq-accordion .accordion-item {
  background: var(--color-surface);
  border: none;
  border-radius: var(--radius-md) !important;
  box-shadow: var(--shadow-card);
  margin-bottom: 0.75rem;
  overflow: hidden;
  border-left: 4px solid transparent;
  transition: border-color 0.3s ease;
}
.faq-accordion .accordion-item.active-item {
  border-left-color: var(--color-primary);
}
.faq-accordion .accordion-button {
  font-weight: 600;
  padding: 1.25rem 1.5rem;
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: none;
  border-radius: 0 !important;
  font-size: 0.9375rem;
}
.faq-accordion .accordion-button:not(.collapsed) {
  color: var(--color-primary);
  background: var(--color-surface);
  box-shadow: none;
}
.faq-accordion .accordion-button::after {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%232F6BB3'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
  transition: transform 0.3s ease;
}
.faq-accordion .accordion-button:not(.collapsed)::after {
  transform: rotate(180deg);
}
.faq-accordion .accordion-button:focus {
  box-shadow: none;
  outline: 2px solid rgba(47, 107, 179, 0.15);
  outline-offset: -2px;
}
.faq-accordion .accordion-body {
  padding: 0 1.5rem 1.5rem;
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  line-height: 1.7;
}

/* ==== CTA ==== */
.cta-section {
  background: #1E293B;
  position: relative;
  padding: 5rem 0;
  text-align: center;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}
.cta-section .cta-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
  position: relative;
  z-index: 1;
}
.cta-section p {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--text-base);
  max-width: 560px;
  margin: 0 auto 2rem;
  position: relative;
  z-index: 1;
}

/* ==== 页脚 ==== */
.site-footer {
  background: #1E293B;
  color: #94A3B8;
  padding: 4rem 0 0;
}
.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
}
.footer-brand .footer-logo .brand-mark {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  box-shadow: none;
}
.footer-brand .footer-logo .brand-text { color: #fff; }
.footer-brand p {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
  max-width: 260px;
  margin-bottom: 0;
}
.footer-col h4 {
  font-size: var(--text-base);
  font-weight: 600;
  color: #fff;
  margin-bottom: 1.25rem;
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.footer-links a {
  color: rgba(255, 255, 255, 0.6);
  font-size: var(--text-sm);
  display: inline-block;
  transition: color 0.2s ease, transform 0.2s ease;
}
.footer-links a:hover {
  color: #fff;
  transform: translateX(-2px);
}
.footer-contact {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.6);
}
.footer-contact li i {
  width: 16px;
  margin-right: 8px;
  color: var(--color-primary);
}
.footer-bottom {
  margin-top: 3rem;
  padding: 1.5rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.45);
}
.footer-bottom a { color: rgba(255, 255, 255, 0.6); }
.footer-bottom a:hover { color: #fff; }

/* ==== 响应式 ==== */
@media (max-width: 1199px) {
  .hero-stats { gap: 1.5rem; }
}

@media (max-width: 991px) {
  :root { --space-section: 4rem; }
  .nav-actions { margin-left: 0; }
  .navbar-collapse {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: 1rem 0;
  }
  .nav-link-custom { padding: 0.75rem 0 !important; }
  .nav-link-custom::after { display: none; }
  .nav-actions { margin-top: 0.75rem; padding-top: 0.75rem; border-top: 1px solid var(--color-border); }
  .hero-title { font-size: 2.25rem; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 767px) {
  :root { --space-section: 3.5rem; }
  .hero { min-height: auto; padding: calc(60px + 2.5rem) 0 3rem; }
  .hero-title { font-size: 1.8rem; line-height: 1.25; }
  .hero-subtitle { font-size: 1rem; }
  .hero-cta { flex-direction: column; width: 100%; }
  .hero-cta .btn { width: 100%; justify-content: center; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 1.25rem; margin-top: 2.5rem; padding-top: 2rem; }
  .hero-stat .stat-number { font-size: 1.25rem; }
  .section-header .section-title { font-size: 1.6rem; }
  .process-card { margin-bottom: 1rem; }
  .benefit-card { margin-bottom: 1rem; }
  .progress-box { margin-bottom: 1.5rem; }
  .progress-tracker { flex-direction: column; gap: 6px; }
  .progress-segment { height: 6px; }
  .task-item { flex-wrap: wrap; }
  .task-badge { margin-left: auto; }
  .faq-sidebar { margin-bottom: 2rem; }
  .cta-section .cta-title { font-size: 1.6rem; }
  .section-header { margin-bottom: 2rem; }
  .footer-col { margin-bottom: 2rem; }
  .site-footer { padding-top: 3rem; }
  .navbar { min-height: 60px; }
}

/* roulang page: category1 */
:root {
      --color-primary: #2F6BB3;
      --color-primary-dark: #1E4E8F;
      --color-primary-light: #EAF1FA;
      --color-accent: #E8862E;
      --color-accent-dark: #C96F1A;
      --color-bg: #F7F9FC;
      --color-surface: #FFFFFF;
      --color-text: #25344D;
      --color-text-secondary: #5B6B82;
      --color-border: #E1E8F0;
      --color-success: #10B981;
      --color-warning: #F59E0B;
      --color-neutral: #94A3B8;
      --text-xs: 0.75rem;
      --text-sm: 0.875rem;
      --text-base: 1rem;
      --text-lg: 1.125rem;
      --text-xl: 1.25rem;
      --text-2xl: 1.5rem;
      --text-3xl: 2rem;
      --text-4xl: 2.5rem;
      --text-5xl: 3rem;
      --space-section: 6rem;
      --space-card-padding: 1.5rem;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-pill: 50px;
      --shadow-card: 0 4px 16px rgba(31, 64, 110, 0.08);
      --shadow-card-hover: 0 8px 28px rgba(31, 64, 110, 0.14);
    }

    * { box-sizing: border-box; }

    html { scroll-behavior: smooth; }

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
      color: var(--color-text);
      background: var(--color-bg);
      line-height: 1.75;
      margin: 0;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: var(--color-primary);
      text-decoration: none;
      transition: color 0.2s ease;
    }

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

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

    button, input, select, textarea { font: inherit; }

    h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; margin-top: 0; }

    p { margin-top: 0; }

    .container { max-width: 1200px; padding-left: 24px; padding-right: 24px; }

    .section-padding { padding: var(--space-section) 0; }

    @media (max-width: 767px) {
      .section-padding { padding: 3.5rem 0; }
    }

    /* ---------- 导航 ---------- */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1030;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--color-border);
      transition: box-shadow 0.3s;
    }

    .site-header.scrolled { box-shadow: var(--shadow-card); }

    .site-header .navbar {
      min-height: 72px;
      padding: 0;
    }

    .navbar-brand {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      font-weight: 700;
      font-size: 1.375rem;
      color: var(--color-primary);
      letter-spacing: -0.01em;
    }

    .navbar-brand:hover { color: var(--color-primary-dark); }

    .brand-mark {
      width: 38px;
      height: 38px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--color-primary-light);
      color: var(--color-primary);
      border-radius: 10px;
      font-size: 1.05rem;
      transition: background 0.2s, color 0.2s;
    }

    .navbar-brand:hover .brand-mark {
      background: var(--color-primary);
      color: #fff;
    }

    .navbar-nav { margin-left: 1.75rem; gap: 0.25rem; }

    .nav-link-custom {
      display: inline-flex;
      align-items: center;
      padding: 0.625rem 1rem;
      color: var(--color-text-secondary);
      font-size: 0.9375rem;
      font-weight: 500;
      position: relative;
      transition: color 0.2s;
      white-space: nowrap;
    }

    .nav-link-custom:hover { color: var(--color-primary); }

    .nav-link-custom::after {
      content: '';
      position: absolute;
      left: 1rem;
      right: 1rem;
      bottom: 0.25rem;
      height: 3px;
      border-radius: 3px;
      background: var(--color-primary);
      transform: scaleX(0);
      transition: transform 0.3s;
    }

    .nav-link-custom:hover::after,
    .nav-link-custom.active::after { transform: scaleX(1); }

    .nav-link-custom.active {
      color: var(--color-primary);
      font-weight: 600;
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 0.875rem;
      margin-left: 1rem;
    }

    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      background: rgba(16, 185, 129, 0.1);
      color: #0B8A62;
      font-size: var(--text-xs);
      font-weight: 600;
      padding: 0.375rem 0.875rem;
      border-radius: var(--radius-pill);
      line-height: 1.4;
    }

    .status-badge .dot {
      width: 6px;
      height: 6px;
      background: var(--color-success);
      border-radius: 50%;
      animation: pulse 1.8s infinite;
    }

    @keyframes pulse {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.5; transform: scale(1.3); }
    }

    .navbar-toggler {
      border: none;
      color: var(--color-text);
      padding: 0.4rem 0.6rem;
      font-size: 1.125rem;
    }

    .navbar-toggler:focus {
      box-shadow: 0 0 0 4px rgba(47, 107, 179, 0.15);
      outline: none;
    }

    /* ---------- 按钮 ---------- */
    .btn {
      border-radius: var(--radius-pill);
      font-weight: 600;
      padding: 0.75rem 2rem;
      transition: all 0.25s ease;
      border: 1.5px solid transparent;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.4rem;
    }

    .btn-brand {
      background: var(--color-primary);
      color: #fff;
      border-color: var(--color-primary);
    }

    .btn-brand:hover {
      background: var(--color-primary-dark);
      border-color: var(--color-primary-dark);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(30, 78, 143, 0.2);
    }

    .btn-accent {
      background: var(--color-accent);
      color: #fff;
      border-color: var(--color-accent);
    }

    .btn-accent:hover {
      background: var(--color-accent-dark);
      border-color: var(--color-accent-dark);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(201, 111, 26, 0.22);
    }

    .btn-outline-brand {
      background: transparent;
      color: var(--color-primary);
      border-color: var(--color-primary);
    }

    .btn-outline-brand:hover {
      background: var(--color-primary-light);
      color: var(--color-primary-dark);
      transform: translateY(-2px);
    }

    .btn:focus-visible {
      outline: none;
      box-shadow: 0 0 0 4px rgba(47, 107, 179, 0.25);
    }

    .btn-sm { padding: 0.5rem 1.25rem; font-size: 0.875rem; }
    .btn-lg { padding: 0.85rem 2.25rem; font-size: 1.0625rem; }

    /* ---------- 分类页 Hero ---------- */
    .category-hero {
      background: linear-gradient(135deg, rgba(240, 245, 252, 0.96) 0%, rgba(234, 241, 250, 0.93) 55%, rgba(227, 236, 248, 0.95) 100%), url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
      padding: 4.5rem 0 5rem;
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid rgba(47, 107, 179, 0.06);
    }

    .category-hero::before {
      content: '';
      position: absolute;
      top: -80px;
      right: -60px;
      width: 320px;
      height: 320px;
      border-radius: 50%;
      background: rgba(47, 107, 179, 0.07);
      pointer-events: none;
    }

    .category-hero::after {
      content: '';
      position: absolute;
      bottom: -70px;
      left: 18%;
      width: 220px;
      height: 220px;
      border-radius: 50%;
      background: rgba(232, 134, 46, 0.05);
      pointer-events: none;
    }

    .category-hero .container { position: relative; z-index: 2; }

    .breadcrumb-custom {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      font-size: var(--text-sm);
      color: var(--color-text-secondary);
      margin-bottom: 2.5rem;
      flex-wrap: wrap;
    }

    .breadcrumb-custom a {
      color: var(--color-text-secondary);
      transition: color 0.2s;
    }

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

    .breadcrumb-custom i {
      font-size: 0.65rem;
      color: var(--color-neutral);
    }

    .breadcrumb-custom span { color: var(--color-primary); font-weight: 500; }

    .hero-tag {
      display: inline-block;
      background: var(--color-primary-light);
      color: var(--color-primary);
      font-size: var(--text-xs);
      font-weight: 600;
      padding: 0.3rem 0.875rem;
      border-radius: var(--radius-pill);
      margin-bottom: 1rem;
      letter-spacing: 0.03em;
    }

    .category-hero h1 {
      font-size: var(--text-5xl);
      font-weight: 700;
      margin-bottom: 0.75rem;
      color: var(--color-text);
      letter-spacing: -0.02em;
    }

    .category-hero .hero-description {
      font-size: 1.125rem;
      color: var(--color-text-secondary);
      max-width: 560px;
      margin-bottom: 1.75rem;
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      gap: 0.875rem;
      flex-wrap: wrap;
    }

    /* ---------- 板块标题 ---------- */
    .section-head { text-align: center; margin-bottom: 3rem; }

    .section-tag {
      display: inline-block;
      background: var(--color-primary-light);
      color: var(--color-primary);
      font-size: var(--text-xs);
      font-weight: 600;
      padding: 0.3rem 0.9rem;
      border-radius: var(--radius-pill);
      margin-bottom: 0.75rem;
      letter-spacing: 0.04em;
    }

    .section-head h2 {
      font-size: var(--text-3xl);
      font-weight: 700;
      color: var(--color-text);
      margin-bottom: 0.5rem;
    }

    .section-head p {
      font-size: var(--text-sm);
      color: var(--color-text-secondary);
      margin-bottom: 0;
    }

    /* ---------- 内容范围卡片 ---------- */
    .category-scope { background: var(--color-bg); }

    .feature-card {
      background: var(--color-surface);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
      padding: 1.75rem 1.5rem;
      height: 100%;
      transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
      border: 1px solid transparent;
      position: relative;
      overflow: hidden;
    }

    .feature-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 4px;
      height: 0;
      background: var(--color-primary);
      transition: height 0.3s;
      border-radius: 0 4px 4px 0;
    }

    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-card-hover);
      border-color: rgba(47, 107, 179, 0.12);
    }

    .feature-card:hover::before { height: 100%; }

    .feature-icon {
      width: 52px;
      height: 52px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--color-primary-light);
      color: var(--color-primary);
      border-radius: 14px;
      font-size: 1.25rem;
      margin-bottom: 1rem;
      transition: background 0.3s, color 0.3s;
    }

    .feature-card:hover .feature-icon {
      background: var(--color-primary);
      color: #fff;
    }

    .feature-card h3 {
      font-size: 1.125rem;
      font-weight: 600;
      margin-bottom: 0.5rem;
    }

    .feature-card p {
      font-size: var(--text-sm);
      color: var(--color-text-secondary);
      margin-bottom: 0;
      line-height: 1.7;
    }

    /* ---------- 精选内容卡片 ---------- */
    .category-featured { background: var(--color-surface); }

    .content-card {
      background: var(--color-surface);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
      overflow: hidden;
      height: 100%;
      transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
      border: 1px solid transparent;
      display: flex;
      flex-direction: column;
    }

    .content-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-card-hover);
      border-color: rgba(47, 107, 179, 0.12);
    }

    .card-image {
      display: block;
      position: relative;
      aspect-ratio: 16 / 9;
      overflow: hidden;
      background: var(--color-primary-light);
    }

    .card-image img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s;
    }

    .content-card:hover .card-image img { transform: scale(1.04); }

    .card-tag {
      position: absolute;
      top: 0.875rem;
      left: 0.875rem;
      background: rgba(255, 255, 255, 0.94);
      color: var(--color-primary);
      font-size: var(--text-xs);
      font-weight: 600;
      padding: 0.25rem 0.75rem;
      border-radius: var(--radius-pill);
      box-shadow: 0 2px 8px rgba(31, 64, 110, 0.08);
      backdrop-filter: blur(4px);
    }

    .card-body {
      padding: 1.25rem 1.375rem 1.375rem;
      display: flex;
      flex-direction: column;
      flex: 1;
    }

    .card-body h3 {
      font-size: 1.125rem;
      font-weight: 600;
      margin-bottom: 0.5rem;
      line-height: 1.45;
    }

    .card-body h3 a {
      color: var(--color-text);
      transition: color 0.2s;
    }

    .card-body h3 a:hover { color: var(--color-primary); }

    .card-body > p {
      font-size: var(--text-sm);
      color: var(--color-text-secondary);
      line-height: 1.7;
      margin-bottom: 1rem;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
      flex: 1;
    }

    .card-meta {
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.8125rem;
      color: var(--color-neutral);
      border-top: 1px solid var(--color-border);
      padding-top: 0.875rem;
    }

    .card-meta i { margin-right: 0.3rem; font-size: 0.75rem; }

    .read-more {
      color: var(--color-primary);
      font-weight: 500;
      font-size: 0.875rem;
      display: inline-flex;
      align-items: center;
      gap: 0.25rem;
      transition: gap 0.2s;
    }

    .read-more:hover { color: var(--color-primary-dark); gap: 0.5rem; }

    .featured-footer {
      text-align: center;
      margin-top: 2.5rem;
    }

    /* ---------- 流程区 ---------- */
    .category-process { background: var(--color-bg); }

    .process-step {
      background: var(--color-surface);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
      padding: 1.75rem 1.5rem;
      height: 100%;
      position: relative;
      transition: transform 0.3s, box-shadow 0.3s;
      border: 1px solid transparent;
    }

    .process-step:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-card-hover);
      border-color: rgba(47, 107, 179, 0.08);
    }

    .step-number {
      font-size: var(--text-2xl);
      font-weight: 700;
      color: var(--color-primary);
      opacity: 0.15;
      line-height: 1;
      margin-bottom: 1rem;
      display: block;
    }

    .step-icon {
      width: 44px;
      height: 44px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--color-primary-light);
      color: var(--color-primary);
      border-radius: 12px;
      font-size: 1rem;
      margin-bottom: 0.875rem;
    }

    .process-step h3 {
      font-size: 1.0625rem;
      font-weight: 600;
      margin-bottom: 0.375rem;
    }

    .process-step p {
      font-size: var(--text-sm);
      color: var(--color-text-secondary);
      margin-bottom: 0;
      line-height: 1.7;
    }

    /* ---------- FAQ ---------- */
    .faq-section { background: var(--color-surface); }

    .faq-section .accordion {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-section .accordion-item {
      background: var(--color-surface);
      border: none;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
      margin-bottom: 0.875rem;
      overflow: hidden;
      transition: box-shadow 0.3s, transform 0.3s;
    }

    .faq-section .accordion-item:last-child { margin-bottom: 0; }

    .faq-section .accordion-item:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-2px);
    }

    .faq-section .accordion-button {
      background: var(--color-surface);
      color: var(--color-text);
      font-weight: 600;
      font-size: var(--text-base);
      padding: 1.25rem 1.5rem;
      border-radius: var(--radius-md) !important;
      box-shadow: none;
      position: relative;
      transition: color 0.3s, background 0.3s;
    }

    .faq-section .accordion-button::before {
      content: '';
      position: absolute;
      left: 0;
      top: 0;
      width: 4px;
      height: 100%;
      background: var(--color-primary);
      opacity: 0;
      transition: opacity 0.3s;
    }

    .faq-section .accordion-button:not(.collapsed)::before { opacity: 1; }

    .faq-section .accordion-button:not(.collapsed) {
      color: var(--color-primary);
      background: var(--color-primary-light);
    }

    .faq-section .accordion-button:focus {
      box-shadow: 0 0 0 4px rgba(47, 107, 179, 0.15);
      border-radius: var(--radius-md) !important;
    }

    .faq-section .accordion-button::after {
      background-size: 1rem;
      font-family: "Font Awesome 6 Free";
      font-weight: 900;
      content: "\f078";
      background-image: none !important;
      font-size: 0.875rem;
      width: 1.25rem;
      height: 1.25rem;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: transform 0.3s;
    }

    .faq-section .accordion-button:not(.collapsed)::after {
      transform: rotate(180deg);
    }

    .faq-section .accordion-body {
      padding: 0 1.5rem 1.375rem 1.5rem;
      color: var(--color-text-secondary);
      font-size: var(--text-sm);
      line-height: 1.8;
      border-top: 1px solid var(--color-border);
    }

    .faq-section .accordion-button:not(.collapsed) + .accordion-collapse .accordion-body {
      border-top-color: rgba(47, 107, 179, 0.1);
    }

    /* ---------- CTA ---------- */
    .cta-banner {
      background: linear-gradient(135deg, #1E293B 0%, #1A2539 100%);
      padding: 4.5rem 0;
      position: relative;
      overflow: hidden;
      background-image: url('/assets/images/backpic/back-2.png'), linear-gradient(135deg, #1E293B 0%, #1A2539 100%);
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
    }

    .cta-banner::before {
      content: '';
      position: absolute;
      top: -40px;
      right: -30px;
      width: 180px;
      height: 180px;
      border-radius: 50%;
      background: rgba(232, 134, 46, 0.08);
      pointer-events: none;
    }

    .cta-banner::after {
      content: '';
      position: absolute;
      bottom: -60px;
      left: 10%;
      width: 220px;
      height: 220px;
      border-radius: 50%;
      background: rgba(47, 107, 179, 0.1);
      pointer-events: none;
    }

    .cta-inner {
      position: relative;
      z-index: 2;
      text-align: center;
      max-width: 680px;
      margin: 0 auto;
    }

    .cta-inner h2 {
      color: #fff;
      font-size: var(--text-3xl);
      font-weight: 700;
      margin-bottom: 0.75rem;
    }

    .cta-inner p {
      color: rgba(255, 255, 255, 0.7);
      font-size: var(--text-base);
      margin-bottom: 2rem;
    }

    /* ---------- 页脚 ---------- */
    .site-footer {
      background: #1E293B;
      color: #94A3B8;
      padding: 3.5rem 0 0;
      font-size: var(--text-sm);
    }

    .site-footer .container {
      max-width: 1200px;
    }

    .footer-brand { margin-bottom: 0.5rem; }

    .footer-logo {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      font-size: 1.25rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 0.875rem;
    }

    .footer-logo .brand-mark { background: rgba(47, 107, 179, 0.35); color: #fff; }

    .footer-brand p {
      color: rgba(255, 255, 255, 0.85);
      font-size: var(--text-sm);
      line-height: 1.8;
      max-width: 320px;
      margin-bottom: 0;
    }

    .footer-col h4 {
      color: #fff;
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 1rem;
    }

    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
      display: flex;
      flex-direction: column;
      gap: 0.5rem;
    }

    .footer-links li a {
      color: #94A3B8;
      display: inline-block;
      transition: all 0.2s;
    }

    .footer-links li a:hover {
      color: #fff;
      transform: translateX(2px);
    }

    .footer-contact {
      list-style: none;
      padding: 0;
      margin: 0;
      display: flex;
      flex-direction: column;
      gap: 0.625rem;
    }

    .footer-contact li {
      display: flex;
      align-items: flex-start;
      gap: 0.5rem;
      color: #94A3B8;
    }

    .footer-contact i {
      color: var(--color-accent);
      width: 18px;
      text-align: center;
      margin-top: 0.25rem;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      margin-top: 3rem;
      padding: 1.25rem 0;
      text-align: center;
      font-size: 0.8125rem;
      color: #94A3B8;
    }

    .footer-bottom a {
      color: #94A3B8;
      transition: color 0.2s;
    }

    .footer-bottom a:hover { color: #fff; }

    /* ---------- 响应式 ---------- */
    @media (max-width: 1199px) {
      .hero-actions { margin-top: 0.5rem; }
    }

    @media (max-width: 991px) {
      .site-header .navbar { min-height: 60px; }
      .navbar-nav { margin-left: 0; margin-top: 0.75rem; gap: 0; }
      .nav-link-custom { padding: 0.75rem 1rem; }
      .nav-link-custom::after { display: none; }
      .nav-actions { margin-left: 0; margin-top: 0.875rem; margin-bottom: 0.75rem; }
      .navbar-collapse { background: rgba(255, 255, 255, 0.98); padding: 0.75rem 1rem; border-radius: var(--radius-md); box-shadow: var(--shadow-card); margin-top: 0.375rem; }
      .category-hero h1 { font-size: 2.25rem; }
      .section-head h2 { font-size: 1.75rem; }
      .cta-inner h2 { font-size: 1.75rem; }
      .category-hero { padding: 3.5rem 0 3.75rem; }
    }

    @media (max-width: 767px) {
      .navbar-brand { font-size: 1.25rem; }
      .brand-mark { width: 34px; height: 34px; font-size: 0.9375rem; }
      .category-hero h1 { font-size: 2rem; }
      .category-hero .hero-description { font-size: 1rem; }
      .hero-actions .btn { width: 100%; }
      .footer-col { margin-bottom: 1.5rem; }
      .footer-bottom { margin-top: 1.5rem; }
      .status-badge { display: none; }
      .nav-actions .btn-accent { margin-left: auto; }
      .card-meta { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
      .read-more { align-self: flex-start; }
      .section-head { margin-bottom: 2rem; }
    }

    @media (max-width: 520px) {
      .category-hero h1 { font-size: 1.75rem; }
      .section-head h2 { font-size: 1.5rem; }
      .breadcrumb-custom { margin-bottom: 1.5rem; }
      .hero-tag { font-size: 0.6875rem; }
      .cta-inner h2 { font-size: 1.5rem; }
      .footer-bottom { font-size: 0.75rem; }
    }

    /* ---------- 通用空态 ---------- */
    .empty-state {
      padding: 3rem 1rem;
      text-align: center;
      color: var(--color-text-secondary);
      font-size: var(--text-sm);
    }

    .empty-state i {
      font-size: 2rem;
      color: var(--color-neutral);
      margin-bottom: 0.75rem;
      display: block;
    }

    /* 图片占位 */
    .img-placeholder {
      background: var(--color-primary-light);
      border: 1px dashed rgba(47, 107, 179, 0.3);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--color-neutral);
      font-size: var(--text-xs);
      min-height: 120px;
      width: 100%;
    }

/* roulang page: article */
:root {
    --color-primary: #2F6BB3;
    --color-primary-dark: #1E4E8F;
    --color-primary-light: #EAF1FA;
    --color-accent: #E8862E;
    --color-accent-dark: #C96F1A;
    --color-bg: #F7F9FC;
    --color-surface: #FFFFFF;
    --color-text: #25344D;
    --color-text-secondary: #5B6B82;
    --color-border: #E1E8F0;
    --color-success: #10B981;
    --color-warning: #F59E0B;
    --color-neutral: #94A3B8;
    --color-dark: #1E293B;
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.875rem;
    --text-3xl: 2.25rem;
    --text-4xl: 2.5rem;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-pill: 50px;
    --shadow-card: 0 4px 16px rgba(31, 64, 110, 0.08);
    --shadow-card-hover: 0 8px 28px rgba(31, 64, 110, 0.14);
    --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-family);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.75;
    margin: 0;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; }
a { text-decoration: none; color: var(--color-primary); transition: color 0.2s ease; }
a:hover { color: var(--color-primary-dark); }
h1, h2, h3, h4, h5, h6 { font-weight: 600; color: var(--color-text); line-height: 1.3; margin-top: 0; }
.container { max-width: 1200px; }

.btn {
    border-radius: var(--radius-pill);
    font-weight: 600;
    padding: 0.75rem 2rem;
    border: none;
    transition: all 0.25s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}
.btn:focus, .btn:focus-visible { box-shadow: 0 0 0 4px rgba(47, 107, 179, 0.18); outline: none; }
.btn-brand { background-color: var(--color-primary); color: #fff; }
.btn-brand:hover { background-color: var(--color-primary-dark); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-card-hover); }
.btn-accent { background-color: var(--color-accent); color: #fff; }
.btn-accent:hover { background-color: var(--color-accent-dark); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-card-hover); }
.btn-outline-brand { background-color: transparent; border: 1.5px solid var(--color-primary); color: var(--color-primary); }
.btn-outline-brand:hover { background-color: var(--color-primary-light); color: var(--color-primary); transform: translateY(-2px); }
.btn-lg { padding: 0.875rem 2.5rem; font-size: 1.0625rem; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transition: box-shadow 0.3s ease;
}
.site-header.scrolled { box-shadow: var(--shadow-card); }
.navbar { padding: 0; min-height: 72px; }
.navbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0;
    margin-right: 2rem;
}
.brand-mark {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: 0 4px 12px rgba(47, 107, 179, 0.3);
    flex-shrink: 0;
}
.brand-text { font-size: 1.25rem; font-weight: 700; color: var(--color-primary); letter-spacing: 0.5px; }
.navbar-nav { gap: 0.25rem; margin-left: 0.5rem; }
.nav-link-custom {
    display: inline-block;
    padding: 0.75rem 1rem;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: 8px;
    position: relative;
    transition: color 0.25s ease;
}
.nav-link-custom:hover { color: var(--color-primary); background: rgba(47, 107, 179, 0.05); }
.nav-link-custom.active { color: var(--color-primary); font-weight: 600; }
.nav-link-custom.active::after {
    content: '';
    position: absolute;
    left: 1rem;
    right: 1rem;
    bottom: 0;
    height: 3px;
    border-radius: 3px;
    background: var(--color-primary);
}
.nav-actions { display: flex; align-items: center; gap: 1rem; }
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 0.375rem 0.875rem;
    border-radius: var(--radius-pill);
    background: rgba(16, 185, 129, 0.1);
    color: #0a8a5c;
    font-size: var(--text-sm);
    font-weight: 600;
    white-space: nowrap;
}
.status-badge .dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--color-success);
    display: inline-block;
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.5); }
    50% { opacity: 0.8; box-shadow: 0 0 0 4px rgba(16, 185, 129, 0); }
}
.navbar-toggler { border: none; font-size: 1.25rem; color: var(--color-text); padding: 0.25rem 0.5rem; }
.navbar-toggler:focus { box-shadow: none; outline: 2px solid var(--color-primary); outline-offset: 2px; }

.article-hero {
    position: relative;
    background: linear-gradient(135deg, rgba(30, 78, 143, 0.96), rgba(47, 107, 179, 0.88)), url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
    padding: 4.5rem 0 4rem;
    color: #fff;
    overflow: hidden;
}
.article-hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 82% 18%, rgba(255, 255, 255, 0.1), transparent 42%);
    pointer-events: none;
}
.article-hero .container { position: relative; z-index: 2; }
.breadcrumb-nav {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 1.5rem;
}
.breadcrumb-nav a { color: rgba(255, 255, 255, 0.85); transition: color 0.2s ease; }
.breadcrumb-nav a:hover { color: #fff; }
.breadcrumb-nav .current {
    color: #fff;
    font-weight: 500;
    max-width: 420px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.breadcrumb-nav i { font-size: 0.625rem; opacity: 0.7; }
.article-hero-title {
    font-size: var(--text-4xl);
    font-weight: 700;
    line-height: 1.25;
    color: #fff;
    margin-bottom: 1.25rem;
    max-width: 900px;
    letter-spacing: 0.5px;
}
.article-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem 0.75rem;
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.85);
}
.article-meta i { margin-right: 4px; opacity: 0.85; }
.meta-divider { color: rgba(255, 255, 255, 0.4); }

.article-body-section { padding: var(--space-section) 0; }
.article-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: 3rem 3.5rem;
    max-width: 900px;
    margin: 0 auto;
    border: 1px solid rgba(225, 232, 240, 0.6);
}
.article-content {
    max-width: 760px;
    margin: 0 auto;
    font-size: 1.0625rem;
    line-height: 1.9;
    color: var(--color-text);
}
.article-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-top: 2.25rem;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--color-primary-light);
}
.article-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-top: 1.75rem;
    margin-bottom: 0.75rem;
}
.article-content h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-top: 1.5rem;
    margin-bottom: 0.6rem;
}
.article-content p { margin-bottom: 1.5em; }
.article-content img {
    border-radius: 8px;
    width: 100%;
    height: auto;
    margin: 1.5rem 0;
    box-shadow: var(--shadow-card);
}
.article-content a { color: var(--color-primary); text-decoration: underline; text-underline-offset: 3px; }
.article-content a:hover { color: var(--color-primary-dark); }
.article-content blockquote {
    border-left: 4px solid var(--color-primary);
    background: var(--color-primary-light);
    padding: 1rem 1.5rem;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    margin: 1.5rem 0;
    color: var(--color-text-secondary);
}
.article-content ul, .article-content ol { margin-bottom: 1.5rem; padding-left: 1.75rem; }
.article-content li { margin-bottom: 0.5rem; }
.article-content code {
    background: var(--color-primary-light);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.9em;
    color: var(--color-primary-dark);
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}
.article-content pre {
    background: var(--color-dark);
    color: #e2e8f0;
    padding: 1.25rem 1.5rem;
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin-bottom: 1.5rem;
    line-height: 1.7;
}
.article-content pre code { background: transparent; color: inherit; padding: 0; font-size: 0.925rem; }
.article-content table {
    width: 100%;
    margin-bottom: 1.5rem;
    border-collapse: collapse;
    border-radius: var(--radius-sm);
    overflow: hidden;
}
.article-content table th, .article-content table td {
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    text-align: left;
}
.article-content table th { background: var(--color-primary-light); font-weight: 600; color: var(--color-text); }
.article-content hr { border: none; border-top: 1px solid var(--color-border); margin: 2rem 0; }

.article-tags {
    border-top: 1px solid var(--color-border);
    margin-top: 2.5rem;
    padding-top: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    max-width: 760px;
    margin-left: auto;
    margin-right: auto;
}
.tag {
    display: inline-block;
    padding: 0.3rem 0.875rem;
    border-radius: var(--radius-pill);
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-size: var(--text-xs);
    font-weight: 600;
    transition: all 0.2s ease;
    cursor: default;
}
.tag:hover { background: var(--color-primary); color: #fff; }

.not-found {
    text-align: center;
    padding: 3rem 1rem;
    max-width: 600px;
    margin: 0 auto;
}
.not-found-icon {
    width: 72px; height: 72px;
    border-radius: 50%;
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-size: 1.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}
.not-found h2 { font-size: 1.5rem; margin-bottom: 0.75rem; }
.not-found p { color: var(--color-text-secondary); margin-bottom: 1.75rem; }

.related-section { padding: 0 0 var(--space-section); }
.section-heading { text-align: center; margin-bottom: 2.75rem; }
.section-heading h2 { font-size: var(--text-2xl); font-weight: 700; margin-bottom: 0.5rem; }
.section-heading p { color: var(--color-text-secondary); font-size: var(--text-base); margin: 0; }
.related-card {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    height: 100%;
    border: 1px solid transparent;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-card-hover); border-color: rgba(47, 107, 179, 0.15); }
.related-thumb { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: var(--color-primary-light); }
.related-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.related-card:hover .related-thumb img { transform: scale(1.05); }
.card-cat {
    position: absolute;
    left: 12px;
    top: 12px;
    background: rgba(255, 255, 255, 0.92);
    color: var(--color-primary);
    font-size: var(--text-xs);
    font-weight: 600;
    padding: 0.3rem 0.75rem;
    border-radius: var(--radius-pill);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}
.related-body { padding: 1.25rem; }
.related-title {
    font-size: 1.0625rem;
    font-weight: 600;
    line-height: 1.5;
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: 3.1rem;
}
.related-title a { color: var(--color-text); transition: color 0.2s ease; }
.related-title a:hover { color: var(--color-primary); }
.related-date { font-size: var(--text-xs); color: var(--color-neutral); }
.related-date i { margin-right: 4px; }
.related-footer { text-align: center; margin-top: 2.5rem; }

.cta-section {
    background: linear-gradient(135deg, #1E293B, #0F172A);
    padding: 4rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
}
.cta-section .container { position: relative; z-index: 2; }
.cta-section h2 { color: #fff; font-size: 2rem; font-weight: 700; margin-bottom: 1rem; }
.cta-section p { color: rgba(255, 255, 255, 0.75); font-size: 1.0625rem; max-width: 600px; margin: 0 auto 2rem; }

.site-footer {
    background: #1E293B;
    color: #94A3B8;
    padding: 4rem 0 0;
    font-size: var(--text-sm);
}
.footer-brand .footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 1rem; }
.footer-brand .brand-mark { background: rgba(255, 255, 255, 0.15); box-shadow: none; }
.footer-brand .brand-text { color: #fff; font-size: 1.25rem; font-weight: 700; }
.footer-brand p { font-size: var(--text-sm); line-height: 1.7; max-width: 320px; color: #94A3B8; margin-bottom: 0; }
.footer-col h4 { color: #fff; font-size: 1.0625rem; font-weight: 600; margin-bottom: 1.25rem; }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: 0.75rem; }
.footer-links a { color: #94A3B8; font-size: var(--text-sm); transition: all 0.2s ease; display: inline-block; }
.footer-links a:hover { color: #fff; transform: translateX(2px); }
.footer-contact { list-style: none; padding: 0; margin: 0; }
.footer-contact li { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; font-size: var(--text-sm); color: #94A3B8; }
.footer-contact i { color: var(--color-primary-light); width: 16px; flex-shrink: 0; }
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 3rem;
    padding: 1.5rem 0;
    text-align: center;
    font-size: var(--text-xs);
    color: #94A3B8;
}
.footer-bottom a { color: #94A3B8; transition: color 0.2s; }
.footer-bottom a:hover { color: #fff; }

@media (max-width: 1199.98px) {
    :root { --space-section: 4.5rem; }
}
@media (max-width: 991.98px) {
    .navbar-expand-lg .navbar-collapse { background: #fff; border-top: 1px solid var(--color-border); margin-top: 0; padding: 1rem 0; }
    .nav-actions { margin-top: 0.75rem; padding-top: 0.75rem; border-top: 1px solid var(--color-border); }
    .article-hero-title { font-size: 2.125rem; }
    .article-card { padding: 2.5rem 2.25rem; }
    .related-grid { row-gap: 1.5rem; }
}
@media (max-width: 767.98px) {
    .navbar { min-height: 60px; }
    .article-hero { padding: 3rem 0 2.5rem; }
    .article-hero-title { font-size: 1.75rem; }
    .breadcrumb-nav .current { max-width: 200px; }
    .article-body-section { padding: 3rem 0; }
    .article-card { padding: 1.5rem 1.25rem; border-radius: var(--radius-md); }
    .article-content { font-size: 1rem; line-height: 1.85; }
    .article-content h2 { font-size: 1.375rem; }
    .article-tags { margin-top: 2rem; }
    .section-heading h2 { font-size: 1.5rem; }
    .related-section { padding-bottom: 3rem; }
    .cta-section { padding: 3rem 0; }
    .cta-section h2 { font-size: 1.5rem; }
    .cta-section p { font-size: 0.95rem; }
    .site-footer { padding-top: 3rem; }
    .footer-bottom { font-size: 0.6875rem; }
    .status-badge { display: none; }
}
@media (max-width: 520px) {
    .article-hero-title { font-size: 1.5rem; }
    .article-card { padding: 1.25rem 1rem; }
    .article-content { font-size: 0.96875rem; }
    .btn { padding: 0.625rem 1.5rem; }
    .cta-section h2 { font-size: 1.375rem; }
}