/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #1A1A3E;
  --primary-light: #2D2D6B;
  --primary-dark: #0E0E24;
  --accent: #FF6B35;
  --accent-hover: #E85A2A;
  --gold: #FFD700;
  --gold-light: #FFE44D;
  --bg-dark: #0A0A1A;
  --bg-card: #1A1A3A;
  --bg-card-hover: #222250;
  --bg-section: #0F0F25;
  --text-primary: #F5F5F5;
  --text-secondary: #C8C8D8;
  --text-muted: #8888A0;
  --border-color: rgba(255, 215, 0, 0.15);
  --border-light: rgba(255, 255, 255, 0.08);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 30px rgba(255, 215, 0, 0.15);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --container-max: 1200px;
  --nav-height: 72px;
  --spacing-section: 100px;
  --spacing-block: 60px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--gold); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--gold-light); }
a:focus-visible { outline: 2px solid var(--gold); outline-offset: 4px; border-radius: 4px; }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea, select { font-family: inherit; font-size: inherit; }
button { cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }

/* ===== 容器 ===== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}
@media (max-width: 768px) {
  .container { padding: 0 16px; }
}

/* ===== 导航 ===== */
.header {
  position: fixed;
  top: 16px;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  justify-content: center;
  pointer-events: none;
}
.nav {
  pointer-events: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(26, 26, 62, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 215, 0, 0.12);
  border-radius: 60px;
  padding: 0 32px;
  height: 60px;
  max-width: 900px;
  width: 100%;
  box-shadow: var(--shadow-md), var(--shadow-glow);
  transition: var(--transition);
}
.nav:hover {
  border-color: rgba(255, 215, 0, 0.25);
  box-shadow: var(--shadow-lg), 0 0 40px rgba(255, 215, 0, 0.1);
}
.nav-logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 1px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-logo i {
  color: var(--gold);
  font-size: 22px;
}
.nav-logo:hover { color: var(--gold); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-links a {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 18px;
  border-radius: 40px;
  transition: var(--transition);
  letter-spacing: 0.3px;
}
.nav-links a:hover {
  color: var(--text-primary);
  background: rgba(255, 215, 0, 0.08);
}
.nav-links a.active {
  color: var(--bg-dark);
  background: var(--gold);
  font-weight: 600;
}
.nav-toggle {
  display: none;
  font-size: 22px;
  color: var(--text-primary);
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.nav-toggle:hover {
  background: rgba(255,215,0,0.1);
  border-color: var(--gold);
}
@media (max-width: 768px) {
  .header { top: 12px; }
  .nav { padding: 0 20px; height: 54px; border-radius: 40px; max-width: 96%; }
  .nav-logo { font-size: 17px; gap: 8px; }
  .nav-logo i { font-size: 18px; }
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav.mobile-open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    right: 0;
    background: rgba(15, 15, 37, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 215, 0, 0.15);
    border-radius: 24px;
    padding: 16px;
    gap: 4px;
    box-shadow: var(--shadow-lg);
  }
  .nav.mobile-open .nav-links a {
    font-size: 16px;
    padding: 12px 20px;
    border-radius: 12px;
    width: 100%;
    text-align: center;
  }
}

/* ===== Hero 首屏 ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-dark);
  overflow: hidden;
  padding-top: var(--nav-height);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  opacity: 0.45;
  z-index: 0;
  animation: heroZoom 20s ease-in-out infinite alternate;
}
@keyframes heroZoom {
  0% { transform: scale(1); }
  100% { transform: scale(1.06); }
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(10,10,26,0.3) 0%, rgba(10,10,26,0.85) 80%);
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  padding: 40px 24px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 215, 0, 0.12);
  border: 1px solid rgba(255, 215, 0, 0.2);
  border-radius: 40px;
  padding: 8px 20px;
  font-size: 13px;
  color: var(--gold);
  letter-spacing: 1px;
  margin-bottom: 28px;
  backdrop-filter: blur(4px);
}
.hero-badge i { font-size: 14px; }
.hero h1 {
  font-size: clamp(42px, 7vw, 76px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -1px;
  background: linear-gradient(135deg, #FFFFFF 30%, var(--gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 20px;
}
.hero p {
  font-size: clamp(17px, 2.2vw, 22px);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 36px;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--gold), #E8B800);
  color: var(--bg-dark);
  font-weight: 700;
  font-size: 16px;
  padding: 14px 36px;
  border-radius: 60px;
  box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
  transition: var(--transition);
  border: none;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(255, 215, 0, 0.45);
  color: var(--bg-dark);
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,0.06);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 16px;
  padding: 14px 36px;
  border-radius: 60px;
  border: 1px solid rgba(255,255,255,0.12);
  transition: var(--transition);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,215,0,0.3);
  color: var(--gold);
  transform: translateY(-2px);
}
.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  color: var(--text-muted);
  font-size: 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  animation: scrollBounce 2s ease-in-out infinite;
}
@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}
.hero-scroll i { font-size: 18px; }
@media (max-width: 768px) {
  .hero { min-height: 90vh; padding-top: 70px; }
  .hero h1 { font-size: 36px; }
  .hero p { font-size: 16px; }
  .btn-primary, .btn-secondary { padding: 12px 28px; font-size: 15px; }
}

/* ===== 通用板块 ===== */
.section {
  padding: var(--spacing-section) 0;
}
.section-alt {
  background: var(--bg-section);
}
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-block);
}
.section-header h2 {
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
}
.section-header h2 span {
  background: linear-gradient(135deg, var(--gold), #FF8C00);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-header p {
  color: var(--text-secondary);
  font-size: 17px;
  max-width: 600px;
  margin: 0 auto;
}
.section-divider {
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--accent));
  border-radius: 4px;
  margin: 16px auto 0;
}
@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .section-header { margin-bottom: 40px; }
}

/* ===== 品牌理念 ===== */
.brand-section {
  position: relative;
  overflow: hidden;
}
.brand-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.brand-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.brand-image img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  transition: var(--transition);
}
.brand-image:hover img {
  transform: scale(1.03);
}
.brand-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,10,26,0.4), transparent);
}
.brand-text h3 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.3;
}
.brand-text p {
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 16px;
}
.brand-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 215, 0, 0.08);
  border: 1px solid rgba(255, 215, 0, 0.12);
  border-radius: 40px;
  padding: 6px 16px;
  font-size: 13px;
  color: var(--gold);
  transition: var(--transition);
}
.tag i { font-size: 12px; }
.tag:hover {
  background: rgba(255, 215, 0, 0.15);
  border-color: rgba(255, 215, 0, 0.25);
}
@media (max-width: 968px) {
  .brand-grid { grid-template-columns: 1fr; gap: 32px; }
  .brand-image img { height: 280px; }
  .brand-text h3 { font-size: 26px; }
}

/* ===== 分类卡片 ===== */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.cat-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}
.cat-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 215, 0, 0.25);
  box-shadow: var(--shadow-md), var(--shadow-glow);
  background: var(--bg-card-hover);
}
.cat-card-image {
  position: relative;
  height: 200px;
  overflow: hidden;
}
.cat-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}
.cat-card:hover .cat-card-image img {
  transform: scale(1.05);
}
.cat-card-image .cat-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px 20px;
  background: linear-gradient(to top, rgba(10,10,26,0.8), transparent);
}
.cat-card-image .cat-overlay span {
  display: inline-block;
  background: var(--gold);
  color: var(--bg-dark);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 40px;
  letter-spacing: 0.5px;
}
.cat-card-body {
  padding: 20px;
}
.cat-card-body h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.3;
}
.cat-card-body p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 16px;
}
.cat-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--gold);
  transition: var(--transition);
}
.cat-card-link i { font-size: 12px; transition: var(--transition); }
.cat-card-link:hover i { transform: translateX(4px); }
@media (max-width: 600px) {
  .categories-grid { grid-template-columns: 1fr; }
}

/* ===== 最新资讯 ===== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.news-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--border-color);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.news-card:hover {
  border-color: rgba(255, 215, 0, 0.2);
  box-shadow: var(--shadow-md);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
}
.news-card .news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.news-card .news-meta .news-cat {
  background: rgba(255, 215, 0, 0.1);
  color: var(--gold);
  padding: 2px 12px;
  border-radius: 40px;
  font-size: 12px;
  font-weight: 600;
}
.news-card .news-meta .news-date i { margin-right: 4px; }
.news-card h3 {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 10px;
  flex: 1;
}
.news-card h3 a {
  color: var(--text-primary);
  transition: var(--transition);
}
.news-card h3 a:hover { color: var(--gold); }
.news-card p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 16px;
}
.news-card .news-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 12px;
  border-top: 1px solid rgba(255,255,255,0.05);
}
.news-card .news-foot a {
  font-size: 13px;
  font-weight: 600;
  color: var(--gold);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.news-card .news-foot a i { font-size: 11px; }
.news-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
  font-size: 16px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px dashed rgba(255,255,255,0.08);
}
.news-empty i {
  font-size: 40px;
  display: block;
  margin-bottom: 16px;
  opacity: 0.3;
}
@media (max-width: 600px) {
  .news-grid { grid-template-columns: 1fr; }
}

/* ===== 数据统计 ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stat-item {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 32px 20px;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}
.stat-item:hover {
  border-color: rgba(255, 215, 0, 0.2);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}
.stat-item .stat-num {
  font-size: clamp(36px, 4vw, 52px);
  font-weight: 800;
  background: linear-gradient(135deg, var(--gold), #FF8C00);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
  margin-bottom: 6px;
}
.stat-item .stat-label {
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
}
@media (max-width: 968px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .stat-item { padding: 24px 16px; }
}
@media (max-width: 520px) {
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
}

/* ===== 服务流程 ===== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}
.steps-grid::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), var(--accent), var(--gold));
  opacity: 0.2;
  z-index: 0;
}
.step-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 32px 20px;
  text-align: center;
  border: 1px solid var(--border-color);
  position: relative;
  z-index: 1;
  transition: var(--transition);
}
.step-card:hover {
  border-color: rgba(255, 215, 0, 0.2);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}
.step-card .step-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(255, 215, 0, 0.08);
  border: 1px solid rgba(255, 215, 0, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 26px;
  color: var(--gold);
  transition: var(--transition);
}
.step-card:hover .step-icon {
  background: rgba(255, 215, 0, 0.15);
  border-color: rgba(255, 215, 0, 0.3);
  transform: scale(1.05);
}
.step-card .step-num {
  font-size: 13px;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 2px;
  margin-bottom: 6px;
}
.step-card h4 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}
.step-card p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.6;
}
@media (max-width: 968px) {
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid::before { display: none; }
}
@media (max-width: 520px) {
  .steps-grid { grid-template-columns: 1fr; }
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover {
  border-color: rgba(255, 215, 0, 0.15);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition);
  gap: 16px;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
}
.faq-question:hover { color: var(--gold); }
.faq-question i {
  font-size: 14px;
  color: var(--gold);
  transition: var(--transition);
  flex-shrink: 0;
}
.faq-item.active .faq-question i {
  transform: rotate(180deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
}
.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px;
}
@media (max-width: 768px) {
  .faq-question { padding: 16px 18px; font-size: 15px; }
  .faq-item.active .faq-answer { padding: 0 18px 16px; }
}

/* ===== CTA ===== */
.cta-section {
  position: relative;
  overflow: hidden;
}
.cta-box {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  border: 1px solid rgba(255, 215, 0, 0.1);
  position: relative;
  overflow: hidden;
}
.cta-box::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255,215,0,0.06), transparent);
  border-radius: 50%;
}
.cta-box::after {
  content: '';
  position: absolute;
  bottom: -40%;
  left: -20%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(255,107,53,0.05), transparent);
  border-radius: 50%;
}
.cta-box h2 {
  font-size: clamp(28px, 3.5vw, 38px);
  font-weight: 700;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}
.cta-box p {
  color: var(--text-secondary);
  font-size: 17px;
  max-width: 500px;
  margin: 0 auto 28px;
  position: relative;
  z-index: 1;
}
.cta-box .btn-primary {
  position: relative;
  z-index: 1;
}
@media (max-width: 768px) {
  .cta-box { padding: 40px 24px; border-radius: var(--radius-md); }
}

/* ===== 页脚 ===== */
.footer {
  background: var(--primary-dark);
  border-top: 1px solid rgba(255, 215, 0, 0.06);
  padding: 60px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .nav-logo {
  font-size: 22px;
  margin-bottom: 12px;
  display: inline-flex;
}
.footer-brand p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.7;
  max-width: 300px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}
.footer-col a {
  display: block;
  color: var(--text-muted);
  font-size: 14px;
  padding: 4px 0;
  transition: var(--transition);
}
.footer-col a:hover { color: var(--gold); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.04);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--text-muted);
}
.footer-bottom a { color: var(--text-muted); }
.footer-bottom a:hover { color: var(--gold); }
@media (max-width: 868px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ===== 辅助类 ===== */
.text-center { text-align: center; }
.mt-1 { margin-top: 16px; }
.mt-2 { margin-top: 32px; }
.mb-1 { margin-bottom: 16px; }
.mb-2 { margin-bottom: 32px; }
.gap-1 { gap: 16px; }
.flex-center { display: flex; align-items: center; justify-content: center; }

/* ===== 移动端微调 ===== */
@media (max-width: 768px) {
  :root { --spacing-section: 60px; --spacing-block: 36px; }
  .section-header h2 { font-size: 26px; }
  .section-header p { font-size: 15px; }
}

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: rgba(255, 215, 0, 0.2); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255, 215, 0, 0.35); }

/* ===== 选中状态 ===== */
::selection { background: rgba(255, 215, 0, 0.25); color: var(--text-primary); }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a237e;
            --primary-light: #283593;
            --primary-dark: #0d1442;
            --accent: #ff6f00;
            --accent-light: #ffa040;
            --accent-dark: #c43e00;
            --bg: #f8f9fc;
            --bg-alt: #eef0f7;
            --bg-dark: #0d1442;
            --text: #1a1a2e;
            --text-light: #5a5a7a;
            --text-white: #ffffff;
            --border: #dde0ed;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 8px 32px rgba(26, 35, 126, 0.10);
            --shadow-hover: 0 16px 48px rgba(26, 35, 126, 0.18);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul,
        ol {
            list-style: none;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border-bottom: 1px solid rgba(221, 224, 237, 0.5);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .header.scrolled {
            background: rgba(255, 255, 255, 0.96);
            box-shadow: 0 4px 20px rgba(26, 35, 126, 0.08);
        }
        .nav {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
            height: var(--nav-height);
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
            transition: color var(--transition);
        }
        .nav-logo i {
            color: var(--accent);
            font-size: 1.6rem;
        }
        .nav-logo:hover {
            color: var(--accent);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a {
            padding: 8px 18px;
            border-radius: 100px;
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
        }
        .nav-links a:hover {
            color: var(--primary);
            background: rgba(26, 35, 126, 0.06);
        }
        .nav-links a.active {
            color: var(--text-white);
            background: var(--primary);
            box-shadow: 0 4px 12px rgba(26, 35, 126, 0.25);
        }
        .nav-links a.active:hover {
            background: var(--primary-light);
            color: var(--text-white);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary);
            cursor: pointer;
            padding: 8px 12px;
            border-radius: 8px;
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(26, 35, 126, 0.06);
        }

        /* ===== Page Hero / Banner ===== */
        .page-banner {
            padding-top: calc(var(--nav-height) + 20px);
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 20, 66, 0.85) 0%, rgba(26, 35, 126, 0.70) 100%);
            z-index: 1;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            padding: 60px 24px;
        }
        .page-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
            line-height: 1.25;
        }
        .page-banner .breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.95rem;
        }
        .page-banner .breadcrumb a {
            color: rgba(255, 255, 255, 0.9);
            font-weight: 500;
        }
        .page-banner .breadcrumb a:hover {
            color: var(--accent-light);
        }
        .page-banner .breadcrumb span {
            color: rgba(255, 255, 255, 0.6);
        }
        .page-banner .meta-tag {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            padding: 4px 16px;
            border-radius: 100px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 16px;
        }

        /* ===== Article Main ===== */
        .article-main {
            padding: 60px 0 80px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: start;
        }
        .article-content {
            background: #fff;
            border-radius: var(--radius);
            padding: 48px 40px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .article-content .article-header {
            margin-bottom: 32px;
            padding-bottom: 24px;
            border-bottom: 1px solid var(--border);
        }
        .article-content .article-header .cat-badge {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            padding: 4px 16px;
            border-radius: 100px;
            font-size: 0.82rem;
            font-weight: 600;
            margin-bottom: 12px;
        }
        .article-content .article-header h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text);
            line-height: 1.35;
            margin-bottom: 12px;
        }
        .article-content .article-header .meta-line {
            display: flex;
            align-items: center;
            gap: 20px;
            color: var(--text-light);
            font-size: 0.9rem;
            flex-wrap: wrap;
        }
        .article-content .article-header .meta-line i {
            margin-right: 6px;
            color: var(--accent);
        }
        .article-content .featured-image {
            margin-bottom: 32px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
        }
        .article-content .featured-image img {
            width: 100%;
            height: auto;
            max-height: 480px;
            object-fit: cover;
        }
        .article-content .article-body {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text);
        }
        .article-content .article-body p {
            margin-bottom: 20px;
        }
        .article-content .article-body h3,
        .article-content .article-body h4 {
            margin-top: 32px;
            margin-bottom: 16px;
            font-weight: 700;
            color: var(--primary);
        }
        .article-content .article-body h3 {
            font-size: 1.4rem;
        }
        .article-content .article-body h4 {
            font-size: 1.15rem;
        }
        .article-content .article-body ul,
        .article-content .article-body ol {
            margin-bottom: 20px;
            padding-left: 24px;
        }
        .article-content .article-body ul li {
            list-style: disc;
            margin-bottom: 8px;
        }
        .article-content .article-body ol li {
            list-style: decimal;
            margin-bottom: 8px;
        }
        .article-content .article-body blockquote {
            border-left: 4px solid var(--accent);
            background: var(--bg-alt);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-light);
        }
        .article-content .article-body img {
            margin: 24px 0;
            border-radius: var(--radius-sm);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
        }
        .article-content .article-body a {
            color: var(--accent);
            font-weight: 600;
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-content .article-body a:hover {
            color: var(--accent-dark);
        }
        .article-content .article-footer-tags {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .article-content .article-footer-tags .tag {
            background: var(--bg-alt);
            color: var(--text-light);
            padding: 6px 16px;
            border-radius: 100px;
            font-size: 0.85rem;
            font-weight: 500;
            transition: all var(--transition);
        }
        .article-content .article-footer-tags .tag:hover {
            background: var(--primary);
            color: #fff;
        }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 28px 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .sidebar-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-card h3 i {
            color: var(--accent);
        }
        .sidebar-card .side-list li {
            padding: 12px 0;
            border-bottom: 1px solid var(--border);
        }
        .sidebar-card .side-list li:last-child {
            border-bottom: none;
        }
        .sidebar-card .side-list a {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            color: var(--text);
            font-weight: 500;
            transition: color var(--transition);
        }
        .sidebar-card .side-list a:hover {
            color: var(--accent);
        }
        .sidebar-card .side-list a img {
            width: 60px;
            height: 60px;
            border-radius: 8px;
            object-fit: cover;
            flex-shrink: 0;
        }
        .sidebar-card .side-list a .side-text {
            flex: 1;
        }
        .sidebar-card .side-list a .side-text .side-title {
            font-size: 0.95rem;
            font-weight: 600;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .sidebar-card .side-list a .side-text .side-date {
            font-size: 0.8rem;
            color: var(--text-light);
            margin-top: 4px;
        }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: #fff;
            border: none;
            padding: 32px 24px;
            text-align: center;
        }
        .sidebar-cta h3 {
            color: #fff;
            justify-content: center;
        }
        .sidebar-cta p {
            margin-bottom: 20px;
            font-size: 0.95rem;
            opacity: 0.9;
        }
        .sidebar-cta .btn {
            background: var(--accent);
            color: #fff;
            border: none;
            padding: 12px 32px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: all var(--transition);
            display: inline-block;
        }
        .sidebar-cta .btn:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 111, 0, 0.35);
        }

        /* ===== Not Found ===== */
        .not-found {
            text-align: center;
            padding: 80px 24px;
        }
        .not-found i {
            font-size: 4rem;
            color: var(--accent);
            margin-bottom: 24px;
        }
        .not-found h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
        }
        .not-found p {
            color: var(--text-light);
            font-size: 1.1rem;
            margin-bottom: 24px;
        }
        .not-found .btn {
            background: var(--primary);
            color: #fff;
            padding: 14px 36px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition);
            display: inline-block;
        }
        .not-found .btn:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(26, 35, 126, 0.3);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 60px 0 0;
        }
        .footer .container {
            padding-bottom: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-brand .nav-logo {
            color: #fff;
            margin-bottom: 16px;
            font-size: 1.4rem;
        }
        .footer-brand .nav-logo i {
            color: var(--accent);
        }
        .footer-brand p {
            font-size: 0.95rem;
            line-height: 1.7;
            opacity: 0.8;
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.7);
            padding: 6px 0;
            font-size: 0.9rem;
            transition: all var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent-light);
            padding-left: 4px;
        }
        .footer-col a i {
            width: 22px;
            color: var(--accent);
        }
        .footer-bottom {
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            opacity: 0.75;
        }
        .footer-bottom a {
            color: var(--accent-light);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(26, 35, 126, 0.3);
            color: #fff;
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
        }
        .btn-accent:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 111, 0, 0.35);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .article-content {
                padding: 32px 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 6px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                width: 100%;
                padding: 12px 16px;
                border-radius: 10px;
            }
            .nav-links a.active {
                background: var(--primary);
                color: #fff;
            }
            .nav-toggle {
                display: block;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .page-banner {
                min-height: 240px;
            }
            .article-content .article-header h2 {
                font-size: 1.4rem;
            }
            .article-content {
                padding: 24px 16px;
            }
            .article-content .article-body {
                font-size: 1rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .sidebar-card {
                padding: 20px 16px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .nav {
                padding: 0 16px;
            }
            .page-banner h1 {
                font-size: 1.4rem;
            }
            .page-banner .container {
                padding: 40px 16px;
            }
            .article-content .article-header h2 {
                font-size: 1.2rem;
            }
            .article-content .article-header .meta-line {
                font-size: 0.8rem;
                gap: 12px;
            }
            .article-content {
                padding: 16px 12px;
                border-radius: var(--radius-sm);
            }
            .article-main {
                padding: 32px 0 48px;
            }
            .not-found h2 {
                font-size: 1.4rem;
            }
            .not-found i {
                font-size: 3rem;
            }
        }

        /* ===== Scroll Progress ===== */
        .scroll-progress {
            position: fixed;
            top: var(--nav-height);
            left: 0;
            right: 0;
            height: 3px;
            background: rgba(221, 224, 237, 0.3);
            z-index: 999;
        }
        .scroll-progress .bar {
            height: 100%;
            background: linear-gradient(90deg, var(--accent), var(--accent-light));
            width: 0%;
            transition: width 0.1s ease;
        }

        /* ===== Fade In ===== */
        .fade-in {
            opacity: 0;
            transform: translateY(20px);
            animation: fadeInUp 0.6s ease forwards;
        }
        @keyframes fadeInUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

/* roulang page: category1 */
/* ===== :root 设计变量 ===== */
        :root {
            --primary: #1a1a2e;
            --primary-light: #16213e;
            --primary-dark: #0f0f1a;
            --accent: #e94560;
            --accent-hover: #d63850;
            --accent-light: #f06a7e;
            --gold: #f5c518;
            --gold-light: #f8d44a;
            --bg-dark: #0a0a14;
            --bg-card: #1a1a2e;
            --bg-card-hover: #222240;
            --bg-section: #111128;
            --bg-light: #f8f9fc;
            --text-white: #ffffff;
            --text-primary: #e8e8f0;
            --text-secondary: #a0a0b8;
            --text-muted: #6e6e88;
            --border-color: rgba(233, 69, 96, 0.15);
            --border-light: rgba(255, 255, 255, 0.06);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.3);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 30px rgba(233, 69, 96, 0.15);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --space-xs: 8px;
            --space-sm: 16px;
            --space-md: 24px;
            --space-lg: 40px;
            --space-xl: 64px;
            --space-2xl: 96px;
            --max-width: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-dark);
            min-height: 100vh;
        }

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: transparent;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--space-md);
        }

        /* ===== 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            padding: 12px 0;
            background: rgba(10, 10, 20, 0.72);
            backdrop-filter: blur(20px) saturate(1.4);
            -webkit-backdrop-filter: blur(20px) saturate(1.4);
            border-bottom: 1px solid var(--border-light);
            transition: background var(--transition), box-shadow var(--transition);
        }

        .header.scrolled {
            background: rgba(10, 10, 20, 0.92);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
        }

        .nav {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--space-md);
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: 0.5px;
        }

        .nav-logo i {
            color: var(--gold);
            font-size: 26px;
            filter: drop-shadow(0 0 8px rgba(245, 197, 24, 0.3));
        }

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

        .nav-links a {
            padding: 8px 20px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            position: relative;
            letter-spacing: 0.3px;
        }

        .nav-links a:hover {
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-links a.active {
            color: var(--text-white);
            background: var(--accent);
            box-shadow: 0 4px 20px rgba(233, 69, 96, 0.3);
        }

        .nav-links a.active:hover {
            background: var(--accent-hover);
        }

        .nav-toggle {
            display: none;
            font-size: 24px;
            color: var(--text-white);
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.12);
        }

        /* ===== Banner / Hero ===== */
        .category-banner {
            padding: 140px 0 80px;
            background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-section) 50%, var(--bg-dark) 100%);
            position: relative;
            overflow: hidden;
            min-height: 420px;
            display: flex;
            align-items: center;
        }

        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.18;
            z-index: 0;
        }

        .category-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(233, 69, 96, 0.10) 0%, transparent 70%),
                radial-gradient(ellipse at 70% 30%, rgba(245, 197, 24, 0.06) 0%, transparent 60%);
            z-index: 1;
        }

        .category-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .category-banner h1 {
            font-size: 48px;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            line-height: 1.2;
        }

        .category-banner h1 span {
            background: linear-gradient(135deg, var(--gold), var(--gold-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .category-banner p {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 720px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }

        .banner-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
        }

        .banner-tags .tag {
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 500;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-light);
            color: var(--text-secondary);
            transition: all var(--transition);
        }

        .banner-tags .tag:hover {
            background: rgba(233, 69, 96, 0.12);
            border-color: var(--accent);
            color: var(--text-white);
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: var(--space-2xl) 0;
        }

        .section-alt {
            background: var(--bg-section);
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-white);
            text-align: center;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }

        .section-sub {
            font-size: 17px;
            color: var(--text-secondary);
            text-align: center;
            max-width: 600px;
            margin: 0 auto var(--space-xl);
            line-height: 1.8;
        }

        .section-divider {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--gold));
            border-radius: 4px;
            margin: 0 auto var(--space-md);
        }

        /* ===== 指南卡片网格 ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .guide-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .guide-card:hover {
            transform: translateY(-6px);
            border-color: rgba(233, 69, 96, 0.25);
            box-shadow: var(--shadow-lg), var(--shadow-glow);
            background: var(--bg-card-hover);
        }

        .guide-card .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
            transition: transform 0.5s ease;
        }

        .guide-card:hover .card-img {
            transform: scale(1.03);
        }

        .guide-card .card-body {
            padding: 24px 22px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .guide-card .card-tag {
            display: inline-block;
            padding: 3px 14px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.5px;
            text-transform: uppercase;
            background: rgba(233, 69, 96, 0.12);
            color: var(--accent-light);
            margin-bottom: 12px;
            width: fit-content;
        }

        .guide-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 10px;
            line-height: 1.35;
        }

        .guide-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }

        .guide-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid var(--border-light);
            font-size: 13px;
            color: var(--text-muted);
        }

        .guide-card .card-meta i {
            margin-right: 6px;
        }

        .guide-card .card-link {
            color: var(--accent);
            font-weight: 600;
            font-size: 14px;
            transition: color var(--transition);
        }

        .guide-card .card-link:hover {
            color: var(--gold);
        }

        /* ===== 选购指南板块 ===== */
        .buy-guide-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .buy-step {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 24px 28px;
            text-align: center;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
        }

        .buy-step:hover {
            transform: translateY(-4px);
            border-color: rgba(245, 197, 24, 0.2);
            box-shadow: var(--shadow-md);
        }

        .buy-step .step-num {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), var(--accent-hover));
            color: #fff;
            font-size: 22px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            box-shadow: 0 4px 20px rgba(233, 69, 96, 0.25);
        }

        .buy-step h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 10px;
        }

        .buy-step p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== 使用技巧列表 ===== */
        .tips-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .tip-item {
            display: flex;
            align-items: flex-start;
            gap: 18px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 24px 26px;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }

        .tip-item:hover {
            border-color: rgba(233, 69, 96, 0.15);
            background: var(--bg-card-hover);
            transform: translateX(4px);
        }

        .tip-item .tip-icon {
            flex-shrink: 0;
            width: 46px;
            height: 46px;
            border-radius: 12px;
            background: rgba(233, 69, 96, 0.10);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--accent);
        }

        .tip-item h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 4px;
        }

        .tip-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(233, 69, 96, 0.12);
        }

        .faq-question {
            padding: 20px 26px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-white);
            cursor: pointer;
            transition: background var(--transition);
            gap: 16px;
        }

        .faq-question:hover {
            background: rgba(255, 255, 255, 0.02);
        }

        .faq-question i {
            font-size: 18px;
            color: var(--accent);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 26px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 26px 22px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            border-radius: var(--radius-lg);
            padding: 60px 48px;
            text-align: center;
            border: 1px solid var(--border-light);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.06;
            z-index: 0;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
        }

        .cta-section h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 12px;
        }

        .cta-section p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 28px;
        }

        .btn-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            transition: all var(--transition);
            letter-spacing: 0.3px;
        }

        .btn-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 20px rgba(233, 69, 96, 0.3);
        }

        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(233, 69, 96, 0.4);
        }

        .btn-outline {
            background: transparent;
            color: var(--text-white);
            border: 1.5px solid rgba(255, 255, 255, 0.15);
        }

        .btn-outline:hover {
            border-color: var(--accent);
            background: rgba(233, 69, 96, 0.08);
            transform: translateY(-2px);
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-dark);
            border-top: 1px solid var(--border-light);
            padding: var(--space-xl) 0 var(--space-md);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: var(--space-lg);
        }

        .footer-brand .nav-logo {
            margin-bottom: 14px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-secondary);
            padding: 5px 0;
            transition: all var(--transition);
        }

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

        .footer-col a i {
            width: 22px;
            color: var(--accent);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding-top: var(--space-md);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .footer-bottom a {
            color: var(--text-secondary);
        }

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

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .buy-guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .category-banner h1 {
                font-size: 38px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: calc(var(--nav-height) + 4px);
                left: var(--space-md);
                right: var(--space-md);
                background: rgba(10, 10, 20, 0.96);
                backdrop-filter: blur(24px);
                -webkit-backdrop-filter: blur(24px);
                border-radius: var(--radius-md);
                flex-direction: column;
                padding: 16px;
                gap: 6px;
                border: 1px solid var(--border-light);
                box-shadow: var(--shadow-lg);
            }

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

            .nav-links a {
                padding: 12px 20px;
                width: 100%;
                border-radius: var(--radius-sm);
            }

            .nav-toggle {
                display: block;
            }

            .category-banner {
                padding: 120px 0 60px;
                min-height: auto;
            }

            .category-banner h1 {
                font-size: 30px;
            }

            .category-banner p {
                font-size: 16px;
            }

            .section-title {
                font-size: 26px;
            }

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

            .buy-guide-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .tips-list {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .cta-section {
                padding: 40px 24px;
            }

            .cta-section h2 {
                font-size: 26px;
            }

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

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

            .banner-tags .tag {
                font-size: 13px;
                padding: 5px 16px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --space-xl: 40px;
                --space-2xl: 56px;
            }

            .nav-logo {
                font-size: 18px;
            }

            .nav-logo i {
                font-size: 22px;
            }

            .category-banner h1 {
                font-size: 24px;
            }

            .category-banner p {
                font-size: 14px;
            }

            .section-title {
                font-size: 22px;
            }

            .guide-card .card-body {
                padding: 18px 16px 20px;
            }

            .guide-card h3 {
                font-size: 17px;
            }

            .btn {
                padding: 12px 24px;
                font-size: 14px;
                width: 100%;
                justify-content: center;
            }

            .btn-group {
                flex-direction: column;
            }

            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }

            .faq-answer {
                padding: 0 18px;
                font-size: 14px;
            }

            .faq-item.active .faq-answer {
                padding: 0 18px 16px;
            }

            .tip-item {
                padding: 18px 18px;
                flex-direction: column;
                gap: 12px;
            }

            .buy-step {
                padding: 24px 18px 22px;
            }

            .cta-section h2 {
                font-size: 22px;
            }
        }

        /* ===== 滚动动画辅助 ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }