/* roulang page: index */
:root {
  --c-primary: #2563eb;
  --c-primary-dark: #1e40af;
  --c-accent: #7c3aed;
  --c-accent-soft: #ede9fe;
  --c-deep: #0b1220;
  --c-navy: #142a4e;
  --c-bg: #f5f8fc;
  --c-bg-soft: #edf1f7;
  --c-white: #ffffff;
  --c-text: #14233d;
  --c-text-soft: #5b6b82;
  --c-border: #dfe6ef;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-xs: 0 1px 4px rgba(15, 28, 46, 0.05);
  --shadow-sm: 0 2px 12px rgba(15, 28, 46, 0.06);
  --shadow-md: 0 10px 30px rgba(15, 28, 46, 0.09);
  --shadow-lg: 0 20px 50px rgba(15, 28, 46, 0.15);
  --gradient-deep: linear-gradient(135deg, #0b1220 0%, #142a4e 65%, #1e3a8a 100%);
  --transition: 0.25s ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}

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

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

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

button {
  font-family: inherit;
}

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

.section {
  padding: 96px 0;
}

.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--c-accent-soft);
  color: var(--c-accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 18px;
}

.section-head h2 {
  font-size: 34px;
  line-height: 1.3;
  font-weight: 800;
  margin: 0 0 14px;
  color: var(--c-deep);
  letter-spacing: -0.02em;
}

.section-head p {
  font-size: 16px;
  color: var(--c-text-soft);
  margin: 0;
}

/* ===== Header & Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--c-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  gap: 24px;
}

.brand-logo {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.02em;
  white-space: nowrap;
  background: var(--gradient-deep);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--c-deep);
}

.brand-logo i {
  -webkit-text-fill-color: var(--c-primary);
  margin-right: 6px;
  font-size: 18px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--c-bg-soft);
  border: 1px solid var(--c-border);
  border-radius: 999px;
  padding: 4px 6px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--c-text-soft);
  border-radius: 999px;
  padding: 8px 20px;
  transition: all var(--transition);
}

.nav-link:hover {
  color: var(--c-primary-dark);
  background: rgba(255, 255, 255, 0.7);
}

.nav-link.active {
  background: var(--c-white);
  color: var(--c-primary-dark);
  box-shadow: var(--shadow-sm);
}

.nav-link i {
  font-size: 13px;
}

.header-cta {
  flex-shrink: 0;
}

.nav-mobile-cta {
  display: none;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  background: var(--c-white);
  color: var(--c-text);
  font-size: 18px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.menu-toggle:hover {
  background: var(--c-bg-soft);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 15px;
  padding: 12px 26px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  line-height: 1.4;
}

.btn-primary {
  background: var(--c-primary);
  color: var(--c-white) !important;
  border-color: var(--c-primary);
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
  background: var(--c-primary-dark);
  border-color: var(--c-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(37, 99, 235, 0.35);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.btn-ghost {
  background: transparent;
  color: var(--c-white) !important;
  border-color: rgba(255, 255, 255, 0.6);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
}

.btn-accent {
  background: var(--c-accent);
  color: var(--c-white) !important;
  border-color: var(--c-accent);
  box-shadow: 0 8px 24px rgba(124, 58, 237, 0.3);
}

.btn-accent:hover {
  background: #6d28d9;
  border-color: #6d28d9;
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(124, 58, 237, 0.4);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 16px;
  border-radius: 12px;
}

.btn-sm {
  padding: 9px 18px;
  font-size: 13px;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 600px;
  display: flex;
  align-items: center;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(7, 14, 30, 0.92) 0%, rgba(11, 26, 60, 0.78) 45%, rgba(30, 58, 138, 0.45) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 90px 0;
  max-width: 760px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.24);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  padding: 7px 16px;
  border-radius: 999px;
  margin-bottom: 24px;
  backdrop-filter: blur(6px);
}

.hero h1 {
  font-size: 52px;
  line-height: 1.2;
  font-weight: 900;
  color: #fff;
  margin: 0 0 20px;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 19px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.82);
  max-width: 580px;
  margin: 0 0 34px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 40px;
}

.hero-points {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 0;
  padding: 0;
}

.hero-points li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.75);
  font-size: 14px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  padding: 5px 14px;
}

.hero-points li::before {
  content: "◆";
  font-size: 9px;
  color: #93c5fd;
}

/* ===== Intro ===== */
.section-intro {
  background: var(--c-white);
  border-bottom: 1px solid var(--c-border);
}

.intro-grid {
  row-gap: 28px;
}

.intro-card {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 34px 28px;
  height: 100%;
  transition: all var(--transition);
}

.intro-card:hover {
  background: var(--c-white);
  border-color: transparent;
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.intro-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  border-radius: 14px;
  background: var(--gradient-deep);
  color: #fff;
  font-size: 22px;
  margin-bottom: 20px;
}

.intro-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--c-deep);
}

.intro-card p {
  font-size: 14px;
  color: var(--c-text-soft);
  margin: 0;
  line-height: 1.7;
}

/* ===== Category ===== */
.section-category {
  background: var(--c-bg);
}

.category-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 36px;
  align-items: stretch;
}

.category-card {
  display: block;
  position: relative;
  background: var(--c-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--c-border);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  height: 100%;
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.category-card img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  display: block;
}

.category-card-body {
  padding: 30px;
}

.category-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--c-accent-soft);
  color: var(--c-accent);
  font-size: 12px;
  font-weight: 700;
  border-radius: 999px;
  padding: 4px 13px;
  margin-bottom: 14px;
}

.category-card h3 {
  font-size: 22px;
  font-weight: 800;
  color: var(--c-deep);
  margin: 0 0 10px;
}

.category-card p {
  font-size: 14px;
  color: var(--c-text-soft);
  margin: 0 0 22px;
  line-height: 1.7;
}

.category-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 14px;
  color: var(--c-primary);
}

.category-card:hover .category-link {
  color: var(--c-primary-dark);
  gap: 12px;
}

.category-note {
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 34px 30px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  box-shadow: var(--shadow-sm);
}

.category-note i {
  font-size: 30px;
  color: var(--c-accent);
  margin-bottom: 16px;
}

.category-note h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-deep);
  margin: 0 0 10px;
}

.category-note p {
  font-size: 14px;
  color: var(--c-text-soft);
  margin: 0 0 20px;
  line-height: 1.8;
}

/* ===== News List ===== */
.section-latest {
  background: var(--c-white);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
}

.news-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  max-width: 1000px;
  margin: 0 auto;
}

.news-card {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: all var(--transition);
}

.news-card:hover {
  background: var(--c-white);
  border-color: transparent;
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.news-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.news-category {
  inline-size: fit-content;
  background: var(--c-primary);
  color: var(--c-white);
  font-size: 12px;
  font-weight: 700;
  border-radius: 999px;
  padding: 3px 12px;
}

.news-date {
  font-size: 12px;
  color: var(--c-text-soft);
  white-space: nowrap;
}

.news-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-text);
  margin: 0 0 10px;
  line-height: 1.5;
}

.news-card h3 a {
  color: inherit;
}

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

.news-card p {
  font-size: 14px;
  color: var(--c-text-soft);
  margin: 0 0 18px;
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-primary);
}

.news-empty {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--c-text-soft);
  background: var(--c-bg);
  border: 1px dashed var(--c-border);
  border-radius: var(--radius-md);
  padding: 60px 20px;
  font-size: 15px;
}

/* ===== Stats ===== */
.section-stats {
  background: var(--gradient-deep);
  color: #fff;
  padding: 70px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 36px;
  text-align: center;
}

.stat-item i {
  font-size: 30px;
  color: #93c5fd;
  margin-bottom: 11px;
  display: inline-block;
}

.stat-item strong {
  display: block;
  font-size: 40px;
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.3;
  margin-bottom: 4px;
}

.stat-item span {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
}

/* ===== Steps ===== */
.section-steps {
  background: var(--c-bg);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  counter-reset: step;
}

.step-item {
  position: relative;
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 34px 24px 28px;
  transition: all var(--transition);
  height: 100%;
}

.step-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--c-accent-soft);
  color: var(--c-accent);
  font-size: 15px;
  font-weight: 800;
  margin-bottom: 18px;
}

.step-item h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--c-deep);
  margin: 0 0 8px;
}

.step-item p {
  font-size: 13px;
  color: var(--c-text-soft);
  margin: 0;
  line-height: 1.7;
}

/* ===== Featured ===== */
.section-featured {
  background: var(--c-white);
  border-top: 1px solid var(--c-border);
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.featured-card {
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}

.featured-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-6px);
  border-color: transparent;
}

.featured-card img {
  width: 100%;
  height: 190px;
  object-fit: cover;
  display: block;
}

.featured-body {
  padding: 26px 24px 28px;
}

.tag {
  display: inline-flex;
  align-items: center;
  background: var(--c-bg-soft);
  color: var(--c-primary-dark);
  font-size: 12px;
  font-weight: 700;
  border-radius: 999px;
  padding: 4px 12px;
  margin-bottom: 12px;
}

.featured-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-deep);
  margin: 0 0 10px;
  line-height: 1.5;
}

.featured-body p {
  font-size: 14px;
  color: var(--c-text-soft);
  margin: 0 0 18px;
  line-height: 1.7;
}

.featured-more {
  font-size: 13px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ===== FAQ ===== */
.section-faq {
  background: var(--c-bg);
}

.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 6px 24px;
  transition: border-color var(--transition), box-shadow var(--transition);
  overflow: hidden;
}

.faq-item[open] {
  border-color: rgba(37, 99, 235, 0.3);
  box-shadow: var(--shadow-sm);
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 700;
  color: var(--c-deep);
  padding: 18px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 24px;
  color: var(--c-primary);
  font-weight: 400;
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

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

.faq-item p {
  margin: 0 0 22px;
  color: var(--c-text-soft);
  font-size: 14px;
  line-height: 1.8;
  border-top: 1px dashed var(--c-border);
  padding-top: 16px;
}

/* ===== CTA ===== */
.section-cta {
  background: var(--c-white);
}

.cta-panel {
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  border-radius: var(--radius-lg);
  padding: 72px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.cta-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11, 18, 32, 0.92), rgba(30, 58, 138, 0.78));
}

.cta-panel > * {
  position: relative;
  z-index: 2;
}

.cta-panel h2 {
  color: #fff;
  font-size: 34px;
  font-weight: 900;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}

.cta-panel p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 16px;
  margin: 0 auto 32px;
  max-width: 500px;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--c-deep);
  color: rgba(255, 255, 255, 0.75);
  padding: 60px 0 0;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .footer-logo {
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
  display: inline-block;
}

.footer-brand .footer-logo i {
  color: #93c5fd;
  margin-right: 6px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.6);
  max-width: 360px;
  margin: 0;
}

.footer-links h4 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin: 0 0 14px;
}

.footer-links a {
  display: block;
  color: rgba(255, 255, 255, 0.65);
  font-size: 14px;
  padding: 5px 0;
  transition: color var(--transition);
}

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

.footer-bottom {
  padding: 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.65);
}

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

/* ===== Focus States ===== */
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.4);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .category-layout {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 72px 0;
  }

  .hero h1 {
    font-size: 42px;
  }
}

@media (max-width: 768px) {
  .header-inner {
    min-height: 64px;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    left: 16px;
    right: 16px;
    background: var(--c-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 16px;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    border: 1px solid var(--c-border);
  }

  .main-nav.open {
    display: flex;
  }

  .nav-link {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    justify-content: flex-start;
  }

  .nav-link.active {
    background: var(--c-bg-soft);
  }

  .menu-toggle {
    display: inline-flex;
  }

  .header-cta {
    display: none;
  }

  .nav-mobile-cta {
    display: block;
    margin-top: 10px;
    padding-top: 12px;
    border-top: 1px solid var(--c-border);
  }

  .nav-mobile-cta .btn {
    width: 100%;
  }

  .hero {
    min-height: 480px;
  }

  .hero-content {
    padding: 60px 0;
  }

  .hero h1 {
    font-size: 36px;
  }

  .hero-subtitle {
    font-size: 17px;
  }

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

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
  }

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

  .featured-grid {
    grid-template-columns: 1fr;
    max-width: 420px;
    margin: 0 auto;
  }

  .cta-panel {
    padding: 48px 24px;
  }

  .cta-panel h2 {
    font-size: 28px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .section-head h2 {
    font-size: 28px;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }

  .section {
    padding: 56px 0;
  }

  .hero h1 {
    font-size: 30px;
  }

  .hero-actions {
    flex-direction: column;
  }

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

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

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

  .cta-panel {
    padding: 40px 20px;
  }

  .cta-panel h2 {
    font-size: 24px;
  }
}

/* roulang page: category1 */
:root {
  --primary: #172554;
  --primary-light: #1e3a8a;
  --primary-deep: #0f172a;
  --accent: #f59e0b;
  --accent-light: #fbbf24;
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --bg-deep: #0f172a;
  --text-dark: #0f172a;
  --text-body: #334155;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --border-light: #f1f5f9;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --shadow-xs: 0 1px 3px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 2px 10px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 10px 32px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 56px rgba(15, 23, 42, 0.12);
  --transition-fast: 0.22s ease;
  --transition-slow: 0.4s ease;
  --font-main: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-body);
  background: var(--bg-light);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary-light); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 88px 0; position: relative; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-tag { display: inline-block; background: rgba(245, 158, 11, 0.12); color: #b45309; font-size: 13px; font-weight: 600; letter-spacing: 2px; padding: 6px 18px; border-radius: 999px; margin-bottom: 16px; }
.section-title { font-size: 36px; line-height: 1.3; font-weight: 800; color: var(--text-dark); letter-spacing: -1px; }
.section-desc { font-size: 16px; color: var(--text-muted); margin-top: 14px; }
.text-gradient { background: linear-gradient(120deg, var(--primary-light), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 28px; border-radius: 999px; font-weight: 600; border: none; cursor: pointer; transition: all var(--transition-fast); letter-spacing: 0.3px; font-size: 15px; }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 6px 20px rgba(245, 158, 11, 0.35); }
.btn-primary:hover { background: #d97706; color: #fff; transform: translateY(-2px); box-shadow: 0 10px 28px rgba(245, 158, 11, 0.45); }
.btn-primary:focus-visible { outline: 3px solid rgba(245, 158, 11, 0.5); outline-offset: 2px; }
.btn-dark { background: var(--primary); color: #fff; box-shadow: 0 6px 20px rgba(23, 37, 84, 0.3); }
.btn-dark:hover { background: var(--primary-light); color: #fff; transform: translateY(-2px); box-shadow: 0 10px 30px rgba(30, 58, 138, 0.4); }
.btn-outline { background: transparent; color: var(--primary-light); border: 2px solid #c7d2fe; }
.btn-outline:hover { border-color: var(--primary-light); background: rgba(30, 58, 138, 0.05); color: var(--primary-light); }
.btn-lg { padding: 15px 38px; font-size: 16px; }
.btn-sm { padding: 8px 20px; font-size: 13px; }

.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,0.92); backdrop-filter: blur(14px); border-bottom: 1px solid var(--border-light); box-shadow: var(--shadow-xs); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 20px; }
.brand-logo { display: inline-flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 800; color: var(--text-dark); letter-spacing: -0.5px; }
.brand-logo i { color: var(--accent); font-size: 22px; }
.brand-logo:hover { color: var(--primary-light); }
.main-nav { display: flex; align-items: center; gap: 6px; }
.nav-link { padding: 8px 18px; border-radius: 999px; font-size: 15px; font-weight: 500; color: var(--text-body); display: inline-flex; align-items: center; gap: 7px; transition: all var(--transition-fast); }
.nav-link i { font-size: 14px; opacity: 0.7; }
.nav-link:hover { color: var(--primary-light); background: rgba(30, 58, 138, 0.06); }
.nav-link.active { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(23, 37, 84, 0.28); }
.nav-link.active:hover { color: #fff; }
.nav-link.active i { opacity: 1; }
.header-cta { margin-left: 8px; }
.menu-toggle { display: none; background: none; border: none; font-size: 22px; color: var(--text-dark); padding: 8px 12px; border-radius: var(--radius-sm); cursor: pointer; }
.menu-toggle:hover { background: var(--border-light); }
.nav-mobile-cta { display: none; }

.page-hero { position: relative; padding: 110px 0 90px; background: linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(23, 37, 84, 0.82)), url('/assets/images/backpic/back-2.png') center/cover no-repeat; color: #fff; overflow: hidden; }
.page-hero::after { content: ''; position: absolute; bottom: -60px; right: -40px; width: 320px; height: 320px; background: radial-gradient(circle, rgba(245, 158, 11, 0.22), transparent 65%); border-radius: 50%; }
.page-hero .container { position: relative; z-index: 2; }
.hero-breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: rgba(255,255,255,0.65); margin-bottom: 20px; letter-spacing: 0.5px; }
.hero-breadcrumb a { color: rgba(255,255,255,0.8); }
.hero-breadcrumb a:hover { color: var(--accent); }
.hero-breadcrumb i { font-size: 10px; color: rgba(255,255,255,0.4); }
.page-hero h1 { font-size: 44px; line-height: 1.25; font-weight: 800; letter-spacing: -1.5px; margin-bottom: 18px; max-width: 680px; }
.page-hero h1 .highlight { color: var(--accent); }
.page-hero .sub-title { font-size: 17px; line-height: 1.8; color: rgba(255,255,255,0.82); max-width: 640px; opacity: 0.9; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 28px; margin-top: 32px; }
.hero-meta-item { display: flex; align-items: center; gap: 10px; font-size: 14px; color: rgba(255,255,255,0.9); }
.hero-meta-item i { color: var(--accent); font-size: 16px; }

.guide-intro { background: var(--bg-white); }
.intro-card { background: linear-gradient(160deg, #f0f4ff, #ffffff); border: 1px solid var(--border-light); border-radius: var(--radius-lg); padding: 44px; box-shadow: var(--shadow-sm); }
.intro-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 40px; align-items: center; }
.intro-content h2 { font-size: 28px; font-weight: 800; color: var(--text-dark); margin-bottom: 16px; line-height: 1.4; letter-spacing: -0.5px; }
.intro-content p { font-size: 15px; color: var(--text-body); margin-bottom: 14px; line-height: 1.8; }
.intro-points { margin-top: 18px; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.intro-point { display: flex; align-items: center; gap: 10px; font-size: 14px; font-weight: 500; color: var(--text-dark); }
.intro-point i { color: var(--accent); background: rgba(245, 158, 11, 0.12); width: 28px; height: 28px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; font-size: 12px; }
.intro-visual { position: relative; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-md); }
.intro-visual img { width: 100%; height: 260px; object-fit: cover; }
.intro-visual .visual-tip { position: absolute; bottom: 16px; left: 16px; right: 16px; background: rgba(15, 23, 42, 0.82); backdrop-filter: blur(8px); color: #fff; font-size: 13px; padding: 12px 18px; border-radius: var(--radius-sm); display: flex; align-items: center; gap: 8px; border: 1px solid rgba(255,255,255,0.12); }

.feature-section { background: var(--bg-light); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.feature-card { background: var(--bg-white); border-radius: var(--radius-lg); padding: 34px 30px; border: 1px solid var(--border-light); box-shadow: var(--shadow-sm); transition: all var(--transition-slow); position: relative; overflow: hidden; }
.feature-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: linear-gradient(90deg, var(--accent), var(--accent-light)); transform: scaleX(0); transform-origin: left; transition: transform var(--transition-slow); }
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.feature-card:hover::before { transform: scaleX(1); }
.feature-icon { width: 56px; height: 56px; border-radius: 16px; background: linear-gradient(135deg, var(--primary), var(--primary-light)); display: flex; align-items: center; justify-content: center; margin-bottom: 20px; font-size: 22px; color: #fff; box-shadow: 0 8px 20px rgba(23, 37, 84, 0.25); }
.feature-card:nth-child(2) .feature-icon { background: linear-gradient(135deg, #b45309, #f59e0b); box-shadow: 0 8px 20px rgba(245, 158, 11, 0.3); }
.feature-card:nth-child(3) .feature-icon { background: linear-gradient(135deg, #065f46, #10b981); box-shadow: 0 8px 20px rgba(16, 185, 129, 0.3); }
.feature-card h3 { font-size: 19px; font-weight: 700; color: var(--text-dark); margin-bottom: 10px; }
.feature-card p { font-size: 14px; line-height: 1.75; color: var(--text-muted); }
.feature-link { display: inline-block; margin-top: 18px; font-size: 13px; font-weight: 600; color: var(--primary-light); }
.feature-link i { transition: transform var(--transition-fast); font-size: 11px; margin-left: 4px; }
.feature-link:hover i { transform: translateX(4px); }

.flow-section { background: var(--bg-deep); color: #fff; overflow: hidden; position: relative; }
.flow-section::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, rgba(255,255,255,0.12), transparent); }
.flow-section .section-title { color: #fff; }
.flow-section .section-desc { color: rgba(255,255,255,0.6); }
.flow-section .section-tag { background: rgba(245, 158, 11, 0.18); color: var(--accent-light); }
.flow-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 20px; }
.flow-step { background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08); border-radius: var(--radius-lg); padding: 30px 24px; position: relative; backdrop-filter: blur(6px); transition: all var(--transition-slow); }
.flow-step:hover { background: rgba(255,255,255,0.08); transform: translateY(-4px); }
.flow-num { font-size: 42px; font-weight: 800; color: transparent; -webkit-text-stroke: 1.5px rgba(245, 158, 11, 0.5); line-height: 1; margin-bottom: 16px; font-family: Georgia, serif; }
.flow-step h3 { font-size: 17px; font-weight: 700; color: #fff; margin-bottom: 8px; }
.flow-step p { font-size: 13px; line-height: 1.7; color: rgba(255,255,255,0.55); }
.flow-step .step-connect { position: absolute; top: 42px; right: -18px; color: rgba(255,255,255,0.15); font-size: 14px; z-index: 2; }

.articles-section { background: var(--bg-white); }
.article-layout { display: grid; grid-template-columns: 2fr 1fr; gap: 32px; }
.article-main { display: flex; flex-direction: column; gap: 24px; }
.article-card { display: flex; gap: 20px; background: var(--bg-white); border: 1px solid var(--border-light); border-radius: var(--radius-md); padding: 20px; transition: all var(--transition-slow); box-shadow: var(--shadow-xs); }
.article-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.article-cover { width: 140px; height: 105px; border-radius: var(--radius-sm); object-fit: cover; flex-shrink: 0; }
.article-body { flex: 1; }
.article-body h3 { font-size: 17px; font-weight: 700; color: var(--text-dark); margin-bottom: 6px; line-height: 1.5; }
.article-body h3 a { color: var(--text-dark); }
.article-body h3 a:hover { color: var(--primary-light); }
.article-body p { font-size: 13px; color: var(--text-muted); line-height: 1.7; margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.article-meta { display: flex; gap: 14px; font-size: 12px; color: #94a3b8; }
.article-meta i { margin-right: 4px; color: var(--accent); }
.side-list { background: var(--bg-light); border-radius: var(--radius-lg); padding: 28px; border: 1px solid var(--border-light); }
.side-list h3 { font-size: 17px; font-weight: 700; color: var(--text-dark); margin-bottom: 18px; padding-bottom: 12px; border-bottom: 2px solid var(--border-color); position: relative; }
.side-list h3::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 34px; height: 2px; background: var(--accent); }
.side-item { display: flex; align-items: center; gap: 12px; padding: 12px 0; border-bottom: 1px dashed var(--border-color); font-size: 14px; transition: all var(--transition-fast); }
.side-item:last-child { border-bottom: none; }
.side-item i { color: var(--accent); font-size: 13px; width: 16px; text-align: center; }
.side-item a { color: var(--text-body); flex: 1; }
.side-item a:hover { color: var(--primary-light); }
.side-tag { background: var(--accent); color: #fff; font-size: 11px; font-weight: 700; border-radius: 6px; padding: 2px 8px; }
.soft-block { margin-top: 20px; background: linear-gradient(135deg, var(--primary), var(--primary-light)); padding: 24px; border-radius: var(--radius-md); color: #fff; }
.soft-block h4 { font-size: 15px; margin-bottom: 6px; }
.soft-block p { font-size: 13px; opacity: 0.75; margin-bottom: 12px; }
.soft-block a { color: var(--accent); font-size: 13px; font-weight: 600; }

.data-section { background: var(--bg-light); }
.data-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.data-card { text-align: center; background: var(--bg-white); border-radius: var(--radius-lg); padding: 36px 20px; border: 1px solid var(--border-light); box-shadow: var(--shadow-sm); transition: all var(--transition-slow); }
.data-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.data-num { font-size: 40px; font-weight: 800; color: var(--primary-light); line-height: 1.2; letter-spacing: -1px; }
.data-num span { font-size: 20px; }
.data-label { font-size: 14px; color: var(--text-muted); margin-top: 6px; font-weight: 500; }

.faq-section { background: var(--bg-white); }
.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.faq-item { background: var(--bg-light); border-radius: var(--radius-md); padding: 26px 28px; border: 1px solid var(--border-light); transition: all var(--transition-slow); cursor: pointer; }
.faq-item:hover { border-color: var(--accent); box-shadow: var(--shadow-sm); }
.faq-item h3 { font-size: 16px; font-weight: 700; color: var(--text-dark); margin-bottom: 8px; display: flex; align-items: center; gap: 10px; }
.faq-item h3 i { color: var(--accent); font-size: 14px; }
.faq-item p { font-size: 14px; color: var(--text-muted); line-height: 1.75; padding-left: 24px; }

.cta-section { position: relative; padding: 90px 0; background: linear-gradient(135deg, rgba(15,23,42,0.94), rgba(23,37,84,0.88)), url('/assets/images/backpic/back-3.png') center/cover no-repeat; color: #fff; text-align: center; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; top: -80px; left: 50%; transform: translateX(-50%); width: 420px; height: 420px; background: radial-gradient(circle, rgba(245,158,11,0.18), transparent 70%); border-radius: 50%; }
.cta-section .container { position: relative; z-index: 2; }
.cta-section .section-title { color: #fff; }
.cta-section .section-desc { color: rgba(255,255,255,0.72); }
.cta-actions { display: flex; justify-content: center; gap: 18px; margin-top: 32px; flex-wrap: wrap; }

.site-footer { background: var(--bg-deep); color: rgba(255,255,255,0.65); padding: 64px 0 30px; border-top: 1px solid rgba(255,255,255,0.06); }
.footer-top { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 48px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-logo { display: inline-flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 800; color: #fff; margin-bottom: 12px; }
.footer-logo i { color: var(--accent); }
.footer-brand p { font-size: 14px; line-height: 1.75; max-width: 340px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links h4 { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 8px; }
.footer-links a { color: rgba(255,255,255,0.6); font-size: 14px; }
.footer-links a:hover { color: var(--accent); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 26px; font-size: 13px; flex-wrap: wrap; gap: 12px; }
.footer-bottom a { color: rgba(255,255,255,0.45); }
.footer-bottom a:hover { color: var(--accent); }

@media (max-width: 1024px) {
  .section { padding: 72px 0; }
  .section-title { font-size: 30px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .flow-steps { grid-template-columns: repeat(2, 1fr); }
  .data-grid { grid-template-columns: repeat(2, 1fr); }
  .article-layout { grid-template-columns: 1fr; }
  .intro-grid { grid-template-columns: 1fr; }
  .page-hero h1 { font-size: 36px; }
}

@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .section-title { font-size: 26px; }
  .header-inner { height: 64px; }
  .main-nav { position: fixed; top: 64px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 20px 24px 30px; box-shadow: var(--shadow-lg); border-bottom: 1px solid var(--border-light); gap: 8px; display: none; z-index: 99; }
  .main-nav.open { display: flex; }
  .nav-link { width: 100%; padding: 12px 18px; font-size: 16px; }
  .nav-mobile-cta { display: block; width: 100%; margin-top: 12px; }
  .nav-mobile-cta .btn { width: 100%; }
  .header-cta { display: none; }
  .menu-toggle { display: block; }
  .feature-grid { grid-template-columns: 1fr; }
  .flow-steps { grid-template-columns: 1fr; }
  .data-grid { grid-template-columns: 1fr 1fr; }
  .faq-grid { grid-template-columns: 1fr; }
  .page-hero { padding: 70px 0 60px; }
  .page-hero h1 { font-size: 30px; }
  .hero-meta { gap: 14px; }
  .intro-card { padding: 28px 20px; }
  .intro-points { grid-template-columns: 1fr; }
  .article-card { flex-direction: column; }
  .article-cover { width: 100%; height: 160px; }
  .footer-top { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .section { padding: 48px 0; }
  .section-title { font-size: 22px; }
  .data-grid { grid-template-columns: 1fr; }
  .feature-card { padding: 26px 22px; }
  .cta-actions .btn { width: 100%; }
  .page-hero h1 { font-size: 26px; }
  .page-hero .sub-title { font-size: 15px; }
  .hero-breadcrumb { font-size: 12px; }
  .flow-step { padding: 24px 20px; }
}

/* roulang page: article */
:root {
            --primary: #1a2a6c;
            --primary-dark: #101b47;
            --primary-light: #2d3f8f;
            --accent: #c9a961;
            --accent-dark: #b08d3d;
            --accent-light: #f0e6cc;
            --bg: #f5f7fb;
            --bg-deep: #0e1633;
            --card: #ffffff;
            --text: #1a2138;
            --text-light: #5a6275;
            --border: #e3e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 8px 30px rgba(16, 24, 64, 0.08);
            --shadow-lg: 0 16px 40px rgba(16, 24, 64, 0.14);
            --transition: 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        h1, h2, h3, h4, h5, h6 {
            line-height: 1.35;
            margin: 0 0 12px;
            color: var(--text);
        }

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

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

        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
        }

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

        /* ---------- 顶部导航 ---------- */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            position: relative;
        }

        .brand-logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.02em;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .brand-logo i {
            color: var(--accent);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-link {
            padding: 10px 18px;
            border-radius: 999px;
            font-weight: 500;
            color: var(--text-light);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.95rem;
            transition: all var(--transition);
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(26, 42, 108, 0.06);
        }

        .nav-link.active {
            color: var(--primary);
            background: rgba(26, 42, 108, 0.08);
            font-weight: 600;
        }

        .nav-mobile-cta {
            display: none;
        }

        .header-cta {
            margin-left: 12px;
        }

        .menu-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 10px;
            font-size: 1.2rem;
            width: 44px;
            height: 44px;
            cursor: pointer;
            color: var(--primary);
            align-items: center;
            justify-content: center;
            transition: all var(--transition);
        }

        .menu-toggle:hover {
            border-color: var(--primary);
            background: rgba(26, 42, 108, 0.04);
        }

        /* ---------- 按钮 ---------- */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.95rem;
            border: 2px solid transparent;
            cursor: pointer;
            transition: all var(--transition);
            line-height: 1.2;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(26, 42, 108, 0.25);
        }

        .btn-primary:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(26, 42, 108, 0.32);
            color: #fff;
        }

        .btn-accent {
            background: var(--accent);
            color: var(--primary-dark);
            box-shadow: 0 4px 16px rgba(201, 169, 97, 0.3);
        }

        .btn-accent:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            color: #fff;
            box-shadow: 0 8px 24px rgba(201, 169, 97, 0.4);
        }

        .btn-ghost-light {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.6);
            color: #fff;
        }

        .btn-ghost-light:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 8px 20px;
            font-size: 0.88rem;
        }

        .btn-block {
            width: 100%;
        }

        /* ---------- 文章页首屏 ---------- */
        .article-hero {
            position: relative;
            padding: 88px 0 72px;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }

        .article-hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(14, 22, 51, 0.86) 0%, rgba(26, 42, 108, 0.72) 55%, rgba(14, 22, 51, 0.65) 100%);
        }

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

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 36px;
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.88rem;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.8);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color var(--transition);
        }

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

        .breadcrumb-current {
            color: #fff;
            font-weight: 600;
            max-width: 420px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .breadcrumb-category-text {
            color: rgba(255, 255, 255, 0.6);
        }

        .breadcrumb-sep {
            opacity: 0.55;
            font-size: 0.7rem;
        }

        .article-hero-content {
            max-width: 860px;
        }

        .category-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(201, 169, 97, 0.18);
            border: 1px solid rgba(201, 169, 97, 0.4);
            color: var(--accent-light);
            padding: 6px 18px;
            border-radius: 999px;
            font-size: 0.82rem;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .article-hero-title {
            font-size: clamp(1.65rem, 4vw, 2.6rem);
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
            letter-spacing: 0.02em;
            margin-bottom: 18px;
        }

        .article-hero-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            color: rgba(255, 255, 255, 0.72);
            font-size: 0.9rem;
        }

        .article-hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        /* ---------- 文章正文区 ---------- */
        .article-body-section {
            padding: 64px 0;
        }

        .article-layout {
            align-items: flex-start;
        }

        .article-layout .cell {
            margin-bottom: 0;
        }

        .article-main-card {
            background: var(--card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 48px;
            border-top: 5px solid var(--accent);
            transition: box-shadow var(--transition);
        }

        .article-main-card:hover {
            box-shadow: var(--shadow-lg);
        }

        .article-body {
            font-size: 1.02rem;
            line-height: 1.9;
            color: #2a3150;
        }

        .article-body p {
            margin-bottom: 20px;
        }

        .article-body h2 {
            font-size: 1.5rem;
            color: var(--primary);
            margin: 40px 0 16px;
            font-weight: 700;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--border);
        }

        .article-body h3 {
            font-size: 1.2rem;
            color: var(--primary);
            margin: 28px 0 12px;
            font-weight: 600;
        }

        .article-body ul,
        .article-body ol {
            margin: 16px 0 20px;
            padding-left: 24px;
        }

        .article-body li {
            margin-bottom: 8px;
        }

        .article-body blockquote {
            border-left: 4px solid var(--accent);
            background: var(--accent-light);
            padding: 16px 24px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 24px 0;
            color: var(--text-light);
            font-style: italic;
        }

        .article-body img {
            border-radius: var(--radius);
            margin: 24px 0;
            box-shadow: var(--shadow);
        }

        .article-body a {
            color: var(--primary);
            border-bottom: 1px solid var(--accent);
            font-weight: 500;
        }

        .article-body a:hover {
            color: var(--accent-dark);
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
        }

        .article-body th,
        .article-body td {
            border: 1px solid var(--border);
            padding: 10px 14px;
            text-align: left;
        }

        .article-body th {
            background: rgba(26, 42, 108, 0.05);
            font-weight: 600;
        }

        .article-body code {
            background: rgba(26, 42, 108, 0.06);
            padding: 3px 8px;
            border-radius: 4px;
            font-family: "SFMono-Regular", Consolas, monospace;
            font-size: 0.9em;
        }

        .article-body pre {
            background: var(--bg-deep);
            color: #e8eaf6;
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            margin: 20px 0;
        }

        .article-body pre code {
            background: transparent;
            color: inherit;
            padding: 0;
        }

        .article-body hr {
            border: none;
            border-top: 1px solid var(--border);
            margin: 32px 0;
        }

        /* 标签与分享 */
        .article-tags {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }

        .tag-label {
            font-weight: 600;
            color: var(--text-light);
            font-size: 0.9rem;
        }

        .tag-chip {
            display: inline-block;
            background: rgba(26, 42, 108, 0.05);
            border: 1px solid var(--border);
            color: var(--text-light);
            padding: 4px 16px;
            border-radius: 999px;
            font-size: 0.82rem;
            font-weight: 500;
            transition: all var(--transition);
        }

        .tag-chip:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .article-share {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 26px;
            flex-wrap: wrap;
        }

        .share-label {
            font-weight: 600;
            color: var(--text-light);
            font-size: 0.9rem;
        }

        .share-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: rgba(26, 42, 108, 0.06);
            color: var(--primary);
            border: none;
            cursor: pointer;
            font-size: 1.05rem;
            transition: all var(--transition);
        }

        .share-btn:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
            box-shadow: 0 6px 16px rgba(26, 42, 108, 0.25);
        }

        /* 未找到内容 */
        .not-found-box {
            text-align: center;
            padding: 56px 24px;
        }

        .not-found-icon {
            width: 96px;
            height: 96px;
            margin: 0 auto 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(26, 42, 108, 0.06);
            color: var(--primary);
            font-size: 2.4rem;
        }

        .not-found-box h3 {
            font-size: 1.5rem;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .not-found-box p {
            color: var(--text-light);
            margin-bottom: 26px;
        }

        /* ---------- 侧边栏 ---------- */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: 96px;
        }

        .sidebar-card {
            background: var(--card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 28px;
            transition: box-shadow var(--transition);
        }

        .sidebar-card:hover {
            box-shadow: var(--shadow-lg);
        }

        .sidebar-card h3 {
            font-size: 1.05rem;
            color: var(--primary);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-card h3 i {
            color: var(--accent);
        }

        .sidebar-card p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.75;
        }

        .sidebar-guide-card {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            border-radius: var(--radius);
            padding: 28px;
            color: #fff;
            box-shadow: var(--shadow-lg);
        }

        .sidebar-guide-card h3 {
            font-size: 1.1rem;
            color: #fff;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-guide-card h3 i {
            color: var(--accent);
        }

        .sidebar-guide-card p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.78);
            margin-bottom: 18px;
            line-height: 1.7;
        }

        /* ---------- 探索/延伸区 ---------- */
        .explore-section {
            padding: 80px 0;
            background: var(--card);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .section-head {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
        }

        .section-kicker {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            color: var(--accent-dark);
            background: var(--accent-light);
            padding: 5px 16px;
            border-radius: 999px;
            margin-bottom: 14px;
        }

        .section-head h2 {
            font-size: clamp(1.5rem, 3vw, 2rem);
            color: var(--primary);
            font-weight: 800;
            margin-bottom: 12px;
        }

        .section-head p {
            color: var(--text-light);
            font-size: 0.98rem;
        }

        .explore-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .explore-card {
            display: block;
            background: var(--card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }

        .explore-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(26, 42, 108, 0.2);
        }

        .explore-cover {
            height: 190px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .explore-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(14, 22, 51, 0.5), transparent 60%);
        }

        .explore-body {
            padding: 26px 24px 24px;
        }

        .explore-body .tag-chip {
            margin-bottom: 12px;
        }

        .explore-body h3 {
            font-size: 1.12rem;
            color: var(--primary);
            margin-bottom: 8px;
            font-weight: 700;
        }

        .explore-body p {
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.65;
            margin-bottom: 16px;
        }

        .explore-more {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color var(--transition);
        }

        .explore-more i {
            transition: transform var(--transition);
        }

        .explore-card:hover .explore-more {
            color: var(--accent-dark);
        }

        .explore-card:hover .explore-more i {
            transform: translateX(4px);
        }

        /* ---------- CTA 区域 ---------- */
        .cta-section {
            position: relative;
            padding: 96px 0;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }

        .cta-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(14, 22, 51, 0.92), rgba(26, 42, 108, 0.78));
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 660px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            color: #fff;
            font-size: clamp(1.5rem, 3vw, 2.2rem);
            font-weight: 800;
            margin-bottom: 14px;
        }

        .cta-inner p {
            color: rgba(255, 255, 255, 0.76);
            margin-bottom: 34px;
            font-size: 1rem;
        }

        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ---------- 页脚 ---------- */
        .site-footer {
            background: var(--bg-deep);
            color: rgba(255, 255, 255, 0.7);
            padding: 64px 0 32px;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-logo {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
            transition: color var(--transition);
        }

        .footer-logo:hover {
            color: var(--accent);
        }

        .footer-logo i {
            color: var(--accent);
        }

        .footer-brand p {
            font-size: 0.92rem;
            line-height: 1.75;
            max-width: 360px;
        }

        .footer-links h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 16px;
            font-weight: 700;
        }

        .footer-links a {
            display: block;
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.9rem;
            margin-bottom: 10px;
            transition: all var(--transition);
        }

        .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 24px;
            font-size: 0.85rem;
        }

        .footer-bottom a {
            color: var(--accent);
            transition: opacity var(--transition);
        }

        .footer-bottom a:hover {
            opacity: 0.8;
        }

        /* ---------- 响应式 ---------- */
        @media (max-width: 1024px) {
            .explore-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .article-sidebar {
                position: static;
            }

            .article-layout .cell + .cell {
                margin-top: 28px;
            }
        }

        @media (max-width: 768px) {
            .main-nav {
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--card);
                padding: 18px 24px;
                display: none;
                flex-direction: column;
                align-items: stretch;
                gap: 6px;
                box-shadow: var(--shadow-lg);
                border-top: 1px solid var(--border);
                border-bottom: 1px solid var(--border);
            }

            .main-nav.open {
                display: flex;
            }

            .nav-link {
                padding: 12px 16px;
            }

            .header-cta {
                display: none;
            }

            .menu-toggle {
                display: inline-flex;
            }

            .nav-mobile-cta {
                display: block;
                padding: 12px 0 4px;
            }

            .article-hero {
                padding: 60px 0 48px;
            }

            .article-main-card {
                padding: 28px 20px;
            }

            .footer-top {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .header-inner {
                height: 64px;
            }

            .brand-logo {
                font-size: 1.15rem;
            }

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

            .article-body {
                font-size: 0.96rem;
            }

            .article-body h2 {
                font-size: 1.3rem;
            }

            .cta-buttons .btn {
                width: 100%;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .breadcrumb-current {
                max-width: 200px;
            }
        }