/* roulang page: index */
/* ========== 1. Design Tokens ========== */
:root {
  --color-bg: #0F0F10;
  --color-surface: #18181A;
  --color-surface-hover: #202023;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-strong: rgba(255, 255, 255, 0.16);
  --color-text: #F5F3EF;
  --color-text-muted: #A8A5A0;
  --color-primary: #C8A060;
  --color-primary-hover: #D9B87C;
  --color-accent: #4E9F7D;
  --color-danger: #C96A55;
  --font-family: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.55);
  --transition: 0.25s ease;
  --sidebar-width: 260px;
  --topbar-height: 64px;
}

/* ========== 2. Reset & Base ========== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

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

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

img {
  max-width: 100%;
  display: block;
  object-fit: cover;
}

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

input, textarea {
  font-family: inherit;
}

h1, h2, h3, h4 {
  line-height: 1.25;
  font-weight: 600;
  color: var(--color-text);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

::selection {
  background: rgba(200, 160, 96, 0.3);
}

/* ========== 3. Layout ========== */
.side-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--color-bg);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  z-index: 1000;
}

.main-wrapper {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.main-content {
  width: 100%;
  flex: 1;
  padding-bottom: 120px;
}

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 32px;
}

.section {
  padding: 96px 0;
}

.section-label {
  display: inline-block;
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  text-transform: uppercase;
  background: rgba(200, 160, 96, 0.12);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 16px;
  font-weight: 500;
}

.section-title {
  font-size: clamp(1.75rem, 2.5vw, 2.5rem);
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.section-desc {
  color: var(--color-text-muted);
  max-width: 620px;
  font-size: 1rem;
  line-height: 1.75;
}

/* ========== 4. Sidebar Nav ========== */
.side-logo {
  height: 72px;
  display: flex;
  align-items: center;
  padding: 0 32px;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-primary);
  flex-shrink: 0;
  box-shadow: 0 0 12px rgba(200, 160, 96, 0.5);
}

.logo-text {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.side-menu {
  flex: 1;
  padding: 24px 0;
  overflow-y: auto;
}

.menu-label {
  display: block;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  padding: 20px 32px 8px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 500;
}

.menu-item {
  display: block;
  padding: 13px 32px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  position: relative;
  transition: color var(--transition), background var(--transition);
}

.menu-item:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.03);
}

.menu-item.active {
  color: var(--color-text);
  font-weight: 500;
}

.menu-item.active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-primary);
  border-radius: 0 2px 2px 0;
}

.side-footer {
  padding: 20px 32px;
  border-top: 1px solid var(--color-border);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

/* ========== 5. Mobile Header & Drawer ========== */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--topbar-height);
  background: rgba(15, 15, 16, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 1100;
}

.hamburger {
  width: 40px;
  height: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: 8px;
  transition: background var(--transition);
}

.hamburger:hover {
  background: rgba(255, 255, 255, 0.06);
}

.hamburger span {
  width: 20px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition);
}

.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1200;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}

.drawer-overlay.show {
  opacity: 1;
  visibility: visible;
}

.drawer {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 280px;
  background: var(--color-bg);
  border-right: 1px solid var(--color-border);
  z-index: 1300;
  transform: translateX(-100%);
  transition: transform 0.3s ease;
  display: flex;
  flex-direction: column;
}

.drawer.open {
  transform: translateX(0);
}

.drawer-logo {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  border-bottom: 1px solid var(--color-border);
}

.drawer-close {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--color-text-muted);
  border-radius: 8px;
  transition: color var(--transition), background var(--transition);
}

.drawer-close:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.06);
}

.drawer-menu {
  flex: 1;
  padding: 16px 0;
  overflow-y: auto;
}

/* ========== 6. Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  border: 1px solid transparent;
  line-height: 1.4;
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: #1a1a1a;
  box-shadow: 0 4px 16px rgba(200, 160, 96, 0.3);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(200, 160, 96, 0.4);
}

.btn-outline {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.3);
  color: var(--color-text);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 16px 40px;
  font-size: 1.05rem;
}

/* ========== 7. Hero ========== */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  background-color: var(--color-bg);
  background-image: linear-gradient(135deg, rgba(15, 15, 16, 0.85) 0%, rgba(15, 15, 16, 0.4) 100%), url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  padding: 80px 0;
  overflow: hidden;
}

.hero-inner {
  max-width: 720px;
  padding: 0 32px;
}

.hero .container {
  width: 100%;
}

.hero-badge {
  display: inline-block;
  font-size: 0.875rem;
  color: var(--color-primary);
  background: rgba(200, 160, 96, 0.12);
  border: 1px solid rgba(200, 160, 96, 0.25);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 24px;
  letter-spacing: 0.06em;
  animation: fadeUp 0.6s ease 0.1s both;
}

.hero-title {
  font-size: clamp(2.25rem, 4vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.02em;
  margin-bottom: 24px;
  animation: fadeUp 0.6s ease 0.2s both;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 42em;
  line-height: 1.75;
  margin-bottom: 36px;
  animation: fadeUp 0.6s ease 0.3s both;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  animation: fadeUp 0.6s ease 0.4s both;
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--color-text-muted);
  font-size: 1.25rem;
  animation: bounceDown 2s infinite;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bounceDown {
  0%, 100% {
    transform: translateX(-50%) translateY(0);
    opacity: 0.6;
  }
  50% {
    transform: translateX(-50%) translateY(10px);
    opacity: 1;
  }
}

/* ========== 8. Stats Bar ========== */
.stats-section {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 48px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.stat-item {
  text-align: center;
  padding: 16px;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: 8px;
}

/* ========== 9. Features List ========== */
.features-section {
  background: var(--color-bg);
}

.features-header {
  margin-bottom: 48px;
}

.features-list {
  border-top: 1px solid var(--color-border);
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 40px 0;
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition);
}

.feature-item:hover {
  background: rgba(255, 255, 255, 0.015);
}

.feature-num {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  width: 72px;
  flex-shrink: 0;
  opacity: 0.85;
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(200, 160, 96, 0.1);
  border: 1px solid rgba(200, 160, 96, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.feature-content {
  flex: 1;
  min-width: 0;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-desc {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  max-width: 600px;
}

.feature-link {
  color: var(--color-primary);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  transition: gap var(--transition);
}

.feature-link:hover {
  gap: 10px;
  color: var(--color-primary-hover);
}

/* ========== 10. Showcase ========== */
.showcase-section {
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-surface) 100%);
}

.showcase-row {
  display: flex;
  align-items: center;
  gap: 64px;
  margin-bottom: 96px;
}

.showcase-row:last-child {
  margin-bottom: 0;
}

.showcase-row.reverse {
  flex-direction: row-reverse;
}

.showcase-image {
  flex: 1;
  min-width: 0;
}

.showcase-image img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  aspect-ratio: 16 / 10;
  transition: transform var(--transition), box-shadow var(--transition);
}

.showcase-image img:hover {
  transform: scale(1.01);
  box-shadow: var(--shadow-hover);
}

.showcase-text {
  flex: 1;
  min-width: 0;
}

.showcase-text .section-label {
  margin-bottom: 12px;
}

.showcase-text h2 {
  font-size: clamp(1.5rem, 2vw, 2rem);
  margin-bottom: 16px;
}

.showcase-text p {
  color: var(--color-text-muted);
  margin-bottom: 24px;
  max-width: 520px;
}

.showcase-features {
  list-style: none;
  margin-bottom: 32px;
}

.showcase-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--color-text);
  font-size: 0.95rem;
  margin-bottom: 10px;
}

.showcase-features li::before {
  content: "✓";
  color: var(--color-accent);
  font-weight: 700;
  flex-shrink: 0;
}

.showcase-link {
  color: var(--color-primary);
  font-size: 1rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap var(--transition);
}

.showcase-link:hover {
  color: var(--color-primary-hover);
  gap: 10px;
}

/* ========== 11. News List ========== */
.news-section {
  background: var(--color-bg);
}

.news-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 40px;
  flex-wrap: wrap;
  gap: 16px;
}

.news-header-left {
  max-width: 600px;
}

.news-more {
  color: var(--color-primary);
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 0;
  transition: gap var(--transition);
}

.news-more:hover {
  color: var(--color-primary-hover);
  gap: 10px;
}

.news-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.news-card {
  display: flex;
  align-items: center;
  gap: 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(200, 160, 96, 0.3);
}

.news-thumb {
  width: 160px;
  height: 100px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  background: linear-gradient(135deg, rgba(200, 160, 96, 0.15), rgba(15, 15, 16, 0.8)), url('/assets/images/coverpic/cover-2.png');
  background-size: cover;
  background-position: center;
}

.news-thumb-default {
  width: 160px;
  height: 100px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  background: linear-gradient(135deg, rgba(200, 160, 96, 0.1), rgba(15, 15, 16, 0.8)), var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.news-body {
  flex: 1;
  min-width: 0;
}

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

.badge {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--color-primary);
  background: rgba(200, 160, 96, 0.12);
  padding: 4px 12px;
  border-radius: 999px;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.news-time {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.news-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 6px;
  line-height: 1.4;
}

.news-title a {
  transition: color var(--transition);
}

.news-title a:hover {
  color: var(--color-primary);
}

.news-excerpt {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-link {
  font-size: 0.85rem;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition);
}

.news-link:hover {
  gap: 8px;
  color: var(--color-primary-hover);
}

.empty-state {
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-md);
  padding: 64px;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 1rem;
  background: rgba(255, 255, 255, 0.01);
}

/* ========== 12. Testimonials ========== */
.testimonial-section {
  background: var(--color-surface);
}

.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 64px;
}

.testimonial-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(200, 160, 96, 0.2);
}

.testimonial-card::before {
  content: "“";
  position: absolute;
  top: 12px;
  left: 20px;
  font-size: 4rem;
  color: var(--color-primary);
  opacity: 0.3;
  line-height: 1;
}

.testimonial-text {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.75;
  margin: 24px 0 20px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(200, 160, 96, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  color: var(--color-primary);
  font-weight: 600;
  flex-shrink: 0;
}

.testimonial-name {
  font-size: 0.9rem;
  font-weight: 600;
}

.testimonial-role {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.partner-section {
  border-top: 1px solid var(--color-border);
  padding-top: 48px;
}

.partner-heading {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  text-align: center;
  margin-bottom: 24px;
  letter-spacing: 0.08em;
}

.partner-logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px 48px;
  align-items: center;
}

.partner-logo {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.35);
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: color var(--transition);
  cursor: default;
}

.partner-logo:hover {
  color: rgba(255, 255, 255, 0.7);
}

/* ========== 13. FAQ ========== */
.faq-section {
  background: var(--color-bg);
}

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

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
  transition: border-color var(--transition);
}

.faq-item.open {
  border-color: rgba(200, 160, 96, 0.3);
}

.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  font-size: 1rem;
  font-weight: 500;
  text-align: left;
  width: 100%;
  transition: color var(--transition);
}

.faq-q:hover {
  color: var(--color-primary);
}

.faq-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  position: relative;
  display: inline-block;
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  background: var(--color-primary);
  border-radius: 2px;
  transition: transform var(--transition);
}

.faq-icon::before {
  width: 14px;
  height: 2px;
  top: 11px;
  left: 5px;
}

.faq-icon::after {
  width: 2px;
  height: 14px;
  top: 5px;
  left: 11px;
}

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

.faq-a {
  padding: 0 24px 24px;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.75;
  display: none;
}

.faq-item.open .faq-a {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ========== 14. CTA Section ========== */
.cta-section {
  background: linear-gradient(135deg, rgba(200, 160, 96, 0.08), rgba(15, 15, 16, 0.4)), url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  border-top: 1px solid var(--color-border);
  padding: 96px 0;
  text-align: center;
}

.cta-inner {
  max-width: 700px;
  margin: 0 auto;
}

.cta-inner h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  margin-bottom: 16px;
}

.cta-inner p {
  color: var(--color-text-muted);
  margin-bottom: 32px;
  font-size: 1.05rem;
}

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

/* ========== 15. Footer ========== */
.site-footer {
  background: #0A0A0B;
  border-top: 1px solid var(--color-border);
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand h3 {
  font-size: 1.125rem;
  margin-bottom: 16px;
}

.footer-brand p {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  line-height: 1.7;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--color-text);
}

.footer-col a {
  display: block;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  padding: 4px 0;
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-copyright {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.footer-copyright a {
  color: var(--color-text-muted);
}

.footer-copyright a:hover {
  color: var(--color-primary);
}

.footer-restore {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  background: none;
  border: 1px solid var(--color-border);
  padding: 6px 14px;
  border-radius: 6px;
  transition: all var(--transition);
}

.footer-restore:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ========== 16. Fixed Bottom Bar ========== */
.fixed-cta {
  position: fixed;
  bottom: 0;
  left: var(--sidebar-width);
  right: 0;
  z-index: 1050;
  background: rgba(15, 15, 16, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-top: 1px solid var(--color-border-strong);
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 64px;
  transition: transform var(--transition);
}

.fixed-cta.hidden {
  transform: translateY(100%);
}

.fixed-cta-text {
  font-size: 0.95rem;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.fixed-cta-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.fixed-cta .btn {
  padding: 10px 24px;
  font-size: 0.9rem;
}

.fixed-cta-close {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 1rem;
  transition: color var(--transition), background var(--transition);
}

.fixed-cta-close:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.06);
}

/* ========== 17. Responsive ========== */
@media (max-width: 992px) {
  .side-nav {
    display: none;
  }

  .mobile-header {
    display: flex;
  }

  .main-wrapper {
    margin-left: 0;
    padding-top: var(--topbar-height);
  }

  .fixed-cta {
    left: 0;
  }

  .main-content {
    padding-bottom: 100px;
  }

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

@media (max-width: 768px) {
  .section {
    padding: 64px 0;
  }

  .container {
    padding: 0 16px;
  }

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

  .stat-number {
    font-size: 2rem;
  }

  .feature-item {
    flex-wrap: wrap;
    gap: 16px;
    padding: 28px 0;
  }

  .feature-num {
    width: 48px;
    font-size: 1.5rem;
  }

  .feature-link {
    margin-left: 64px;
  }

  .showcase-row {
    flex-direction: column !important;
    gap: 32px;
    margin-bottom: 64px;
  }

  .showcase-image {
    width: 100%;
  }

  .showcase-text {
    width: 100%;
  }

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

  .news-card {
    flex-direction: column;
    align-items: flex-start;
    padding: 16px;
  }

  .news-thumb,
  .news-thumb-default {
    width: 100%;
    height: 140px;
  }

  .cta-section {
    padding: 64px 0;
  }
}

@media (max-width: 576px) {
  .hero {
    min-height: 70vh;
    padding: 48px 0;
  }

  .hero-inner {
    padding: 0 16px;
  }

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

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

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

  .footer-bottom {
    flex-direction: column;
  }

  .fixed-cta {
    padding: 0 16px;
    height: auto;
    min-height: 72px;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    gap: 8px;
    padding: 12px 16px;
  }

  .fixed-cta-text {
    font-size: 0.85rem;
  }

  .fixed-cta-actions {
    width: 100%;
    justify-content: space-between;
  }

  .main-content {
    padding-bottom: 120px;
  }

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

/* roulang page: article */
:root{
  --color-bg:#0F0F10;
  --color-surface:#18181A;
  --color-surface-hover:#202023;
  --color-border:rgba(255,255,255,0.08);
  --color-border-strong:rgba(255,255,255,0.16);
  --color-text:#F5F3EF;
  --color-text-muted:#A8A5A0;
  --color-primary:#C8A060;
  --color-primary-hover:#D9B87C;
  --color-accent:#4E9F7D;
  --color-danger:#C96A55;
  --font-sans:"PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:8px;
  --shadow-card:0 12px 32px rgba(0,0,0,0.4);
  --shadow-hover:0 20px 40px rgba(0,0,0,0.55);
  --transition:0.25s ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-sans);
  background:var(--color-bg);
  color:var(--color-text);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block;object-fit:cover}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,select,textarea{font-family:inherit}
.container{max-width:1240px;margin:0 auto;padding:0 32px}
.sidebar{
  position:fixed;top:0;left:0;width:260px;height:100vh;
  background:var(--color-bg);
  border-right:1px solid var(--color-border);
  z-index:1000;
  display:flex;flex-direction:column;
}
.sidebar-logo{
  height:72px;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 24px;
  border-bottom:1px solid var(--color-border);
}
.logo-link{display:flex;align-items:center;gap:12px}
.logo-dot{
  width:10px;height:10px;border-radius:50%;
  background:var(--color-primary);
  flex-shrink:0;
  box-shadow:0 0 16px rgba(200,160,96,0.5);
}
.logo-text{
  font-size:1.05rem;font-weight:600;color:var(--color-text);
  letter-spacing:0.01em;white-space:nowrap;
}
.sidebar-close{display:none;font-size:1.25rem;color:var(--color-text-muted)}
.side-menu{
  flex:1;display:flex;flex-direction:column;
  padding:24px 0;
}
.menu-item{
  display:block;
  padding:14px 32px;
  font-size:0.95rem;
  color:var(--color-text-muted);
  position:relative;
  transition:color var(--transition),background var(--transition);
}
.menu-item:hover{color:var(--color-text);background:rgba(255,255,255,0.03)}
.menu-item.active{color:var(--color-text);font-weight:600}
.menu-item.active::before{
  content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:2px;height:20px;background:var(--color-primary);
  border-radius:0 2px 2px 0;
}
.menu-label{
  display:block;padding:14px 32px 6px;
  font-size:0.75rem;color:var(--color-text-muted);
  opacity:0.6;letter-spacing:0.08em;text-transform:uppercase;
}
.sidebar-footer{
  padding:20px 24px;
  border-top:1px solid var(--color-border);
  font-size:0.8rem;color:var(--color-text-muted);opacity:0.7;
}
.mobile-header{
  display:none;
  position:fixed;top:0;left:0;right:0;height:64px;
  background:rgba(15,15,16,0.92);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--color-border);
  z-index:999;
  padding:0 16px;
  align-items:center;justify-content:space-between;
}
.mobile-logo{display:flex;align-items:center;gap:10px;font-weight:600;font-size:1rem}
.menu-toggle{font-size:1.25rem;color:var(--color-text);padding:8px}
.overlay{
  display:none;
  position:fixed;inset:0;background:rgba(0,0,0,0.5);
  z-index:998;
}
.overlay.show{display:block}
.main-wrapper{margin-left:260px;min-height:100vh;display:flex;flex-direction:column}
.main-content{flex:1;padding-bottom:96px}
.article-page{
  max-width:1240px;margin:0 auto;padding:56px 32px 0;
}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;
  gap:10px;font-size:0.85rem;color:var(--color-text-muted);
  margin-bottom:32px;
}
.breadcrumb a{color:var(--color-text-muted);transition:color var(--transition)}
.breadcrumb a:hover{color:var(--color-primary)}
.breadcrumb-sep{opacity:0.5}
.breadcrumb-current{color:var(--color-text);max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-tag{
  display:inline-block;
  background:rgba(200,160,96,0.12);
  color:var(--color-primary);
  font-size:0.85rem;
  padding:6px 16px;
  border-radius:999px;
  margin-bottom:20px;
}
.article-h1{
  font-size:clamp(2rem,3.5vw,3rem);
  font-weight:700;
  line-height:1.2;
  letter-spacing:0.01em;
  margin-bottom:20px;
  max-width:900px;
}
.article-meta{
  display:flex;flex-wrap:wrap;gap:24px;
  font-size:0.875rem;color:var(--color-text-muted);
  padding-bottom:32px;
  border-bottom:1px solid var(--color-border);
  margin-bottom:40px;
}
.meta-item{display:flex;align-items:center;gap:8px}
.meta-item i{color:var(--color-primary);font-size:0.95rem}
.article-body-wrap{max-width:900px}
.article-prose{
  max-width:760px;
  font-size:1.0625rem;
  line-height:1.85;
  color:rgba(245,243,239,0.92);
}
.article-prose p{margin-bottom:1.6em}
.article-prose h2{
  font-size:1.6rem;font-weight:700;margin:2em 0 0.8em;
  line-height:1.3;color:var(--color-text);
}
.article-prose h3{
  font-size:1.25rem;font-weight:600;margin:1.8em 0 0.6em;
  color:var(--color-text);
}
.article-prose h4{
  font-size:1.1rem;font-weight:600;margin:1.4em 0 0.5em;
  color:var(--color-text);
}
.article-prose ul,.article-prose ol{
  margin:0 0 1.6em 1.4em;
}
.article-prose ul li,.article-prose ol li{margin-bottom:0.5em}
.article-prose ul li::marker{color:var(--color-primary)}
.article-prose ol li::marker{color:var(--color-primary)}
.article-prose blockquote{
  border-left:3px solid var(--color-primary);
  background:rgba(200,160,96,0.06);
  padding:16px 24px;
  margin:1.6em 0;
  border-radius:0 12px 12px 0;
  color:var(--color-text-muted);
  font-style:italic;
}
.article-prose a{color:var(--color-primary);border-bottom:1px solid rgba(200,160,96,0.3);transition:border-color var(--transition)}
.article-prose a:hover{border-color:var(--color-primary)}
.article-prose img{border-radius:16px;margin:32px 0;box-shadow:var(--shadow-card)}
.article-prose code{
  background:var(--color-surface);
  padding:2px 8px;
  border-radius:6px;
  font-size:0.9em;
  color:var(--color-primary);
}
.article-prose pre{
  background:var(--color-surface);
  padding:20px;border-radius:12px;
  overflow-x:auto;margin:1.6em 0;
  border:1px solid var(--color-border);
}
.article-prose pre code{background:none;padding:0;color:var(--color-text)}
.article-empty{
  background:var(--color-surface);
  border:1px dashed var(--color-border-strong);
  border-radius:var(--radius-lg);
  padding:80px 40px;
  text-align:center;
}
.article-empty i{
  font-size:3rem;color:var(--color-primary);
  margin-bottom:20px;display:block;opacity:0.6;
}
.article-empty h2{font-size:1.75rem;margin-bottom:12px}
.article-empty p{color:var(--color-text-muted);margin-bottom:28px;max-width:420px;margin-left:auto;margin-right:auto}
.article-tags{
  display:flex;flex-wrap:wrap;gap:12px;
  margin-top:48px;padding-top:32px;
  border-top:1px solid var(--color-border);
}
.tag{
  display:inline-block;
  background:var(--color-surface);
  border:1px solid var(--color-border);
  color:var(--color-text-muted);
  font-size:0.85rem;
  padding:6px 16px;
  border-radius:999px;
  transition:all var(--transition);
}
.tag:hover{border-color:var(--color-primary);color:var(--color-primary)}
.related-posts{
  max-width:1240px;margin:0 auto;padding:80px 32px 0;
}
.section-head{
  display:flex;justify-content:space-between;align-items:flex-end;
  margin-bottom:40px;
}
.section-label{
  display:inline-block;
  font-size:0.8rem;color:var(--color-primary);
  letter-spacing:0.1em;
  margin-bottom:8px;
  text-transform:uppercase;
}
.section-head h2{font-size:clamp(1.75rem,2.5vw,2.25rem);font-weight:700;line-height:1.25}
.section-more{
  display:inline-flex;align-items:center;gap:10px;
  color:var(--color-text-muted);
  font-size:0.95rem;
  transition:color var(--transition),gap var(--transition);
  white-space:nowrap;
}
.section-more:hover{color:var(--color-primary);gap:14px}
.related-grid{
  display:grid;grid-template-columns:repeat(2,1fr);
  gap:32px;
}
.related-card{
  display:flex;
  gap:20px;
  background:var(--color-surface);
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  padding:16px;
  transition:all var(--transition);
  align-items:center;
}
.related-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-color:rgba(200,160,96,0.3);
}
.related-thumb{
  width:180px;height:120px;border-radius:10px;
  overflow:hidden;flex-shrink:0;
  background:var(--color-surface-hover);
}
.related-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 0.4s ease}
.related-card:hover .related-thumb img{transform:scale(1.05)}
.related-info{flex:1;min-width:0}
.related-tag{
  display:inline-block;
  font-size:0.75rem;
  background:rgba(200,160,96,0.12);
  color:var(--color-primary);
  padding:2px 10px;
  border-radius:999px;
  margin-bottom:8px;
}
.related-title{
  font-size:1rem;font-weight:600;line-height:1.4;
  margin-bottom:8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color var(--transition);
}
.related-card:hover .related-title{color:var(--color-primary)}
.related-desc{
  font-size:0.85rem;color:var(--color-text-muted);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  margin-bottom:8px;
}
.related-date{font-size:0.8rem;color:var(--color-text-muted);opacity:0.7}
.article-faq{
  max-width:1240px;margin:0 auto;padding:80px 32px 0;
}
.faq-list{max-width:900px}
.faq-item{
  background:var(--color-surface);
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  margin-bottom:16px;
  overflow:hidden;
  transition:border-color var(--transition);
}
.faq-item.open{border-color:rgba(200,160,96,0.25)}
.faq-question{
  width:100%;
  display:flex;justify-content:space-between;align-items:center;
  padding:20px 24px;
  font-size:1rem;
  font-weight:500;
  color:var(--color-text);
  text-align:left;
  transition:background var(--transition);
}
.faq-question:hover{background:var(--color-surface-hover)}
.faq-icon{
  width:28px;height:28px;border-radius:50%;
  border:1px solid var(--color-border-strong);
  display:flex;align-items:center;justify-content:center;
  font-size:0.8rem;color:var(--color-primary);
  flex-shrink:0;
  transition:all var(--transition);
}
.faq-item.open .faq-icon{transform:rotate(45deg);border-color:var(--color-primary);background:rgba(200,160,96,0.1)}
.faq-answer{
  padding:0 24px 24px;
  max-height:0;overflow:hidden;
  transition:max-height 0.4s ease;
}
.faq-item.open .faq-answer{max-height:400px}
.faq-answer p{color:var(--color-text-muted);font-size:0.95rem;line-height:1.8}
.cta-section{
  max-width:1240px;margin:0 auto;padding:80px 32px 0;
}
.cta-card{
  background:linear-gradient(135deg,var(--color-surface) 0%,var(--color-bg) 100%);
  border:1px solid rgba(200,160,96,0.2);
  border-radius:var(--radius-lg);
  padding:64px 48px;
  text-align:center;
  position:relative;
  overflow:hidden;
}
.cta-card::before{
  content:'';position:absolute;top:-60px;right:-60px;
  width:200px;height:200px;
  background:rgba(200,160,96,0.08);
  border-radius:50%;
  filter:blur(40px);
}
.cta-card h2{
  font-size:clamp(1.75rem,3vw,2.5rem);
  font-weight:700;margin-bottom:16px;
  line-height:1.3;
}
.cta-card p{
  color:var(--color-text-muted);
  font-size:1.05rem;
  max-width:560px;margin:0 auto 36px;
}
.cta-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:14px 32px;
  font-size:0.95rem;
  border-radius:var(--radius-sm);
  transition:all var(--transition);
  font-weight:500;
  line-height:1;
  white-space:nowrap;
}
.btn-primary{
  background:var(--color-primary);
  color:#0F0F10;
}
.btn-primary:hover{
  background:var(--color-primary-hover);
  transform:translateY(-2px);
  box-shadow:0 8px 24px rgba(200,160,96,0.25);
}
.btn-ghost{
  background:transparent;
  color:var(--color-text);
  border:1px solid rgba(255,255,255,0.3);
}
.btn-ghost:hover{
  border-color:var(--color-primary);
  color:var(--color-primary);
  transform:translateY(-2px);
}
.site-footer{
  background:#0A0A0B;
  border-top:1px solid var(--color-border);
  margin-top:80px;
  padding:64px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:56px;
  padding-bottom:48px;
}
.footer-brand h3{
  font-size:1.25rem;font-weight:600;
  margin-bottom:16px;
  color:var(--color-text);
}
.footer-brand p{
  font-size:0.9rem;
  color:var(--color-text-muted);
  line-height:1.8;
  max-width:360px;
}
.footer-col h4{
  font-size:1rem;font-weight:600;
  margin-bottom:16px;
  color:var(--color-text);
}
.footer-col a{
  display:block;
  font-size:0.875rem;
  color:var(--color-text-muted);
  padding:6px 0;
  transition:color var(--transition);
}
.footer-col a:hover{color:var(--color-primary)}
.footer-restore{
  font-size:0.875rem;
  color:var(--color-text-muted);
  padding:6px 0;
  text-align:left;
  transition:color var(--transition);
}
.footer-restore:hover{color:var(--color-primary)}
.footer-bottom{
  border-top:1px solid var(--color-border);
  padding:20px 0;
  display:flex;justify-content:space-between;align-items:center;
  flex-wrap:wrap;gap:12px;
}
.footer-copyright{font-size:0.8rem;color:var(--color-text-muted)}
.footer-copyright a{color:var(--color-text-muted);transition:color var(--transition)}
.footer-copyright a:hover{color:var(--color-primary)}
.sticky-cta{
  position:fixed;bottom:0;left:260px;right:0;
  z-index:997;
  background:rgba(15,15,16,0.92);
  backdrop-filter:blur(8px);
  border-top:1px solid var(--color-border);
  padding:12px 32px;
  display:flex;align-items:center;justify-content:space-between;
  gap:20px;
  transition:transform var(--transition);
}
.sticky-cta.hidden{transform:translateY(100%)}
.sticky-cta p{
  font-size:0.95rem;color:var(--color-text);
  display:flex;align-items:center;gap:12px;
  margin:0;
}
.sticky-cta p i{color:var(--color-primary)}
.sticky-cta .btn{padding:10px 24px;font-size:0.9rem}
.sticky-close{
  color:var(--color-text-muted);
  font-size:1.25rem;
  padding:4px 8px;
  transition:color var(--transition);
}
.sticky-close:hover{color:var(--color-danger)}
@media (max-width:992px){
  .sidebar{transform:translateX(-100%);transition:transform 0.3s ease}
  .sidebar.open{transform:translateX(0)}
  .sidebar-close{display:block}
  .mobile-header{display:flex}
  .main-wrapper{margin-left:0}
  .sticky-cta{left:0}
  .article-page,.related-posts,.article-faq,.cta-section{padding-left:16px;padding-right:16px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px}
}
@media (max-width:768px){
  .related-grid{grid-template-columns:1fr}
  .related-card{flex-direction:row}
  .related-thumb{width:120px;height:100px}
  .container{padding:0 16px}
  .article-page{padding-top:40px}
  .article-h1{font-size:1.75rem}
  .article-meta{flex-direction:column;gap:12px}
  .cta-card{padding:48px 24px}
  .cta-btns{flex-direction:column;align-items:stretch}
  .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .sticky-cta{padding:12px 16px}
  .sticky-cta p{font-size:0.875rem}
  .sticky-cta .btn{padding:10px 16px;font-size:0.85rem}
}
@media (max-width:576px){
  .related-card{flex-direction:column;align-items:flex-start}
  .related-thumb{width:100%;height:140px}
  .article-h1{font-size:1.5rem}
  .breadcrumb{font-size:0.8rem}
  .faq-question{padding:16px;font-size:0.9rem}
  .faq-answer{padding:0 16px 16px}
  .cta-card{padding:40px 20px}
  .footer-bottom{flex-direction:column;text-align:center}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important}
  .btn:hover,.related-card:hover{transform:none!important}
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
:root {
  --color-bg: #0F0F10;
  --color-surface: #18181A;
  --color-surface-hover: #202023;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-strong: rgba(255, 255, 255, 0.16);
  --color-text: #F5F3EF;
  --color-text-muted: #A8A5A0;
  --color-primary: #C8A060;
  --color-primary-hover: #D9B87C;
  --color-accent: #4E9F7D;
  --color-danger: #C96A55;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --radius-pill: 999px;
  --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.4);
  --shadow-card-hover: 0 20px 40px rgba(0, 0, 0, 0.55);
  --transition: 0.25s ease;
  --nav-width: 260px;
  --font-sans: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

img {
  max-width: 100%;
  display: block;
  object-fit: cover;
}

button {
  font-family: var(--font-sans);
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input, textarea {
  font-family: var(--font-sans);
}

ul, ol {
  list-style: none;
}

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 32px;
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
}

/* ===== 左侧导航 ===== */
.side-nav {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  width: var(--nav-width);
  background: var(--color-bg);
  border-right: 1px solid var(--color-border);
  z-index: 1002;
  display: flex;
  flex-direction: column;
  padding: 0 0 24px;
}

.side-logo {
  height: 72px;
  display: flex;
  align-items: center;
  padding: 0 32px;
  border-bottom: 1px solid var(--color-border);
}

.side-logo a {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 6px;
}

.logo-dot {
  color: var(--color-primary);
  font-size: 1.5rem;
  line-height: 1;
}

.side-menu-wrap {
  flex: 1;
  padding: 24px 0;
  overflow-y: auto;
}

.menu-label {
  display: block;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  padding: 16px 32px 8px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.menu-item {
  display: block;
  padding: 14px 32px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  border-left: 2px solid transparent;
  transition: var(--transition);
}

.menu-item:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.02);
}

.menu-item.active {
  color: var(--color-text);
  border-left-color: var(--color-primary);
  background: linear-gradient(90deg, rgba(200, 160, 96, 0.08), transparent);
  font-weight: 500;
}

.side-footer {
  padding: 16px 32px;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
}

/* ===== 移动端顶部栏 ===== */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: rgba(15, 15, 16, 0.98);
  border-bottom: 1px solid var(--color-border);
  z-index: 1001;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  backdrop-filter: blur(12px);
}

.mobile-logo {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.02em;
}

.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  padding: 8px;
  transition: var(--transition);
}

.hamburger:hover {
  background: var(--color-surface);
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.drawer-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  opacity: 0;
  transition: opacity var(--transition);
}

.drawer-overlay.active {
  display: block;
  opacity: 1;
}

/* ===== 主容器 ===== */
.main-wrap {
  margin-left: var(--nav-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding-bottom: 64px;
}

.main-content {
  flex: 1;
}

/* ===== 分类 Hero ===== */
.cat-hero {
  position: relative;
  min-height: 420px;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, rgba(15, 15, 16, 0.92) 0%, rgba(15, 15, 16, 0.75) 45%, rgba(15, 15, 16, 0.4) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-bottom: 1px solid var(--color-border);
}

.cat-hero .container {
  position: relative;
  z-index: 2;
  padding-top: 96px;
  padding-bottom: 96px;
}

.breadcrumb {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

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

.cat-hero h1 {
  font-size: clamp(2.25rem, 4vw, 3.2rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.02em;
  margin-bottom: 20px;
  max-width: 640px;
  animation: fadeUp 0.6s ease both;
}

.cat-hero .subtitle {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 42em;
  line-height: 1.75;
  margin-bottom: 32px;
  animation: fadeUp 0.6s ease 0.15s both;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeUp 0.6s ease 0.3s both;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  gap: 8px;
  line-height: 1.4;
}

.btn-primary {
  background: var(--color-primary);
  color: #0F0F10;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(200, 160, 96, 0.25);
}

.btn-secondary {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: var(--color-text);
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-hover);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--color-border-strong);
  color: var(--color-text);
  padding: 10px 24px;
  border-radius: var(--radius-sm);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ===== 内容板块标题区 ===== */
.section {
  padding: 96px 0;
}

.section-label {
  display: inline-block;
  font-size: 0.8125rem;
  color: var(--color-primary);
  letter-spacing: 0.08em;
  border: 1px solid rgba(200, 160, 96, 0.3);
  border-radius: var(--radius-pill);
  padding: 6px 16px;
  background: rgba(200, 160, 96, 0.08);
  margin-bottom: 16px;
}

.section h2 {
  font-size: clamp(1.75rem, 2.5vw, 2.4rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 12px;
}

.section-intro {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 680px;
  line-height: 1.7;
}

/* ===== 核心内容卡片 ===== */
.content-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 48px;
}

.content-card {
  display: grid;
  grid-template-columns: 280px 1fr;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}

.content-card:hover {
  border-color: rgba(200, 160, 96, 0.3);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.content-card .card-img {
  height: 100%;
  min-height: 200px;
  overflow: hidden;
}

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

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

.content-card .card-body {
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.content-card h3 {
  font-size: 1.375rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--color-text);
}

.content-card p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.card-link {
  font-size: 0.875rem;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

.card-link:hover {
  color: var(--color-primary-hover);
  gap: 10px;
}

/* ===== 特色清单 ===== */
.feature-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.feature-list {
  margin-top: 48px;
}

.feature-item {
  display: grid;
  grid-template-columns: 88px 48px 240px 1fr 40px;
  align-items: center;
  gap: 24px;
  padding: 32px 16px;
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}

.feature-item:first-child {
  border-top: 1px solid var(--color-border);
}

.feature-item:hover {
  background: var(--color-surface-hover);
}

.feature-num {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-primary);
  font-family: var(--font-sans);
  letter-spacing: -0.02em;
}

.feature-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(200, 160, 96, 0.12);
  color: var(--color-primary);
}

.feature-item h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
}

.feature-item p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

.feature-arrow {
  color: var(--color-text-muted);
  font-size: 1.25rem;
  transition: var(--transition);
}

.feature-item:hover .feature-arrow {
  color: var(--color-primary);
  transform: translateX(4px);
}

/* ===== 场景演示 ===== */
.scene-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-top: 48px;
}

.scene-block:nth-child(2) {
  margin-top: 96px;
}

.scene-img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  position: relative;
}

.scene-img img {
  width: 100%;
  height: 100%;
  min-height: 320px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.scene-img:hover img {
  transform: scale(1.02);
}

.scene-content .scene-tag {
  display: inline-block;
  font-size: 0.8125rem;
  color: var(--color-primary);
  margin-bottom: 14px;
  letter-spacing: 0.05em;
}

.scene-content h3 {
  font-size: clamp(1.5rem, 2vw, 1.875rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 14px;
}

.scene-content > p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.scene-features {
  margin-bottom: 24px;
}

.scene-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--color-text);
  padding: 6px 0;
}

.scene-features li::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  flex-shrink: 0;
}

/* ===== 数据统计 ===== */
.stats-section {
  background: linear-gradient(135deg, rgba(200, 160, 96, 0.06), transparent);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-top: 48px;
}

.stat-item {
  text-align: center;
  padding: 32px 16px;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.stat-item:hover {
  border-color: rgba(200, 160, 96, 0.25);
  transform: translateY(-4px);
}

.stat-num {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* ===== 最新动态提示 ===== */
.latest-note {
  padding: 64px 0;
}

.latest-note-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px 48px;
  flex-wrap: wrap;
}

.latest-note-inner h2 {
  font-size: 1.375rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.latest-note-inner p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.faq-list {
  margin-top: 48px;
}

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

.faq-item:first-child {
  border-top: 1px solid var(--color-border);
}

.faq-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
  cursor: pointer;
  gap: 16px;
  transition: var(--transition);
}

.faq-item-header:hover .faq-question {
  color: var(--color-primary);
}

.faq-question {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
  transition: var(--transition);
  flex: 1;
}

.faq-icon {
  position: relative;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  transition: transform var(--transition);
}

.faq-icon::before,
.faq-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--color-text-muted);
  transition: background var(--transition);
}

.faq-icon::before {
  width: 14px;
  height: 2px;
}

.faq-icon::after {
  width: 2px;
  height: 14px;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-item.active .faq-icon::before,
.faq-item.active .faq-icon::after {
  background: var(--color-primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-answer-inner {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  padding: 0 40px 24px 0;
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

.faq-item.active .faq-question {
  font-weight: 600;
  color: var(--color-primary);
}

/* ===== CTA ===== */
.cta-section {
  padding: 96px 0;
}

.cta-box {
  background: linear-gradient(135deg, rgba(200, 160, 96, 0.1), transparent 70%), var(--color-surface);
  border: 1px solid rgba(200, 160, 96, 0.2);
  border-radius: var(--radius-lg);
  padding: 64px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-box h2 {
  font-size: clamp(1.75rem, 2.5vw, 2.375rem);
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-box p {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 560px;
  margin: 0 auto 32px;
  line-height: 1.7;
}

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

/* ===== 页脚 ===== */
.site-footer {
  background: #0A0A0B;
  border-top: 1px solid var(--color-border);
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 14px;
}

.footer-brand p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 360px;
}

.footer-col h4 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}

.footer-col a,
.footer-col button {
  display: block;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  padding: 6px 0;
  transition: var(--transition);
  text-align: left;
}

.footer-col a:hover,
.footer-col button:hover {
  color: var(--color-primary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copyright {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.footer-copyright a {
  color: var(--color-text-muted);
}

.footer-copyright a:hover {
  color: var(--color-primary);
}

.footer-restore {
  font-size: 0.8125rem;
  color: var(--color-primary);
  background: transparent;
  border: 1px solid rgba(200, 160, 96, 0.3);
  border-radius: var(--radius-pill);
  padding: 8px 16px;
  transition: var(--transition);
}

.footer-restore:hover {
  background: rgba(200, 160, 96, 0.1);
  border-color: var(--color-primary);
}

/* ===== 底部固定转化条 ===== */
.fixed-cta {
  position: fixed;
  bottom: 0;
  left: var(--nav-width);
  right: 0;
  z-index: 999;
  background: rgba(15, 15, 16, 0.92);
  backdrop-filter: blur(8px);
  border-top: 1px solid var(--color-border);
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  transition: var(--transition);
}

.fixed-cta span {
  font-size: 0.9375rem;
  color: var(--color-text);
}

.fixed-cta .cta-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.fixed-cta .btn {
  padding: 10px 24px;
  font-size: 0.875rem;
}

.close-cta {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 1rem;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.close-cta:hover {
  color: var(--color-text);
  border-color: var(--color-border-strong);
}

/* ===== 焦点可见性 ===== */
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

/* ===== 响应式 ===== */
@media (max-width: 1200px) {
  .feature-item {
    grid-template-columns: 64px 40px 180px 1fr 32px;
    gap: 16px;
  }
}

@media (max-width: 991px) {
  .side-nav {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.4);
  }

  .side-nav.open {
    transform: translateX(0);
  }

  .mobile-header {
    display: flex;
  }

  .drawer-overlay.active {
    display: block;
  }

  .main-wrap {
    margin-left: 0;
    padding-bottom: 80px;
  }

  .fixed-cta {
    left: 0;
    height: 80px;
    padding: 0 16px;
  }

  .fixed-cta span {
    font-size: 0.875rem;
  }

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

  .content-card .card-img {
    height: 200px;
    min-height: auto;
  }

  .scene-block {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .scene-block:nth-child(2) {
    margin-top: 64px;
  }

  .scene-img img {
    min-height: 240px;
  }

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

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

  .feature-item {
    grid-template-columns: 48px 40px 1fr 32px;
  }

  .feature-item p {
    grid-column: 2 / 5;
    margin-top: -8px;
  }
}

@media (max-width: 767px) {
  .section {
    padding: 64px 0;
  }

  .feature-item {
    grid-template-columns: 40px 32px 1fr 24px;
    padding: 24px 8px;
  }

  .feature-num {
    font-size: 1.5rem;
  }

  .feature-icon {
    width: 32px;
    height: 32px;
  }

  .latest-note-inner {
    padding: 32px 24px;
    flex-direction: column;
    align-items: flex-start;
  }

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

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

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

@media (max-width: 575px) {
  .cat-hero h1 {
    font-size: 2.25rem;
  }

  .cat-hero .subtitle {
    font-size: 1rem;
  }

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

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

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

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

  .content-card .card-body {
    padding: 24px;
  }

  .fixed-cta span {
    max-width: 45%;
  }

  .fixed-cta .btn {
    padding: 10px 16px;
    font-size: 0.8125rem;
  }

  .fixed-cta .close-cta {
    display: none;
  }
}

/* ===== 减动效 ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* roulang page: category2 */
:root {
  --color-bg: #0F0F10;
  --color-surface: #18181A;
  --color-surface-hover: #202023;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-strong: rgba(255, 255, 255, 0.16);
  --color-text: #F5F3EF;
  --color-text-muted: #A8A5A0;
  --color-primary: #C8A060;
  --color-primary-hover: #D9B87C;
  --color-accent: #4E9F7D;
  --color-danger: #C96A55;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.4);
  --shadow-card-hover: 0 20px 40px rgba(0, 0, 0, 0.55);
  --font-main: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --nav-width: 260px;
  --topbar-height: 64px;
  --transition-default: 0.25s ease;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-main);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.75;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img {
  max-width: 100%;
  display: block;
  object-fit: cover;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-default);
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}
input, textarea {
  font-family: inherit;
}
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 32px;
}
.side-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--nav-width);
  height: 100vh;
  background: var(--color-bg);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  padding: 0 0 24px;
}
.logo-area {
  height: 72px;
  display: flex;
  align-items: center;
  padding: 0 24px;
  border-bottom: 1px solid var(--color-border);
  gap: 12px;
}
.logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-primary);
  flex-shrink: 0;
}
.logo-text {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-text);
  line-height: 1.4;
}
.side-menu {
  flex: 1;
  padding: 16px 0;
  overflow-y: auto;
}
.menu-label {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding: 16px 32px 8px;
  opacity: 0.7;
}
.menu-item {
  display: block;
  padding: 13px 32px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  border-left: 2px solid transparent;
  transition: color var(--transition-default), background var(--transition-default), border-color var(--transition-default);
  position: relative;
}
.menu-item:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.02);
}
.menu-item.active {
  color: var(--color-text);
  border-left-color: var(--color-primary);
  background: linear-gradient(90deg, rgba(200, 160, 96, 0.08), transparent);
}
.side-footer {
  padding: 16px 32px;
  border-top: 1px solid var(--color-border);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  opacity: 0.6;
  line-height: 1.5;
}
.main-content {
  margin-left: var(--nav-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.top-bar {
  display: none;
}
.page-hero {
  background: linear-gradient(135deg, rgba(15,15,16,0.85) 0%, rgba(15,15,16,0.4) 100%), url(/assets/images/backpic/back-2.webp) center/cover no-repeat;
  min-height: 440px;
  display: flex;
  align-items: center;
  position: relative;
  border-bottom: 1px solid var(--color-border);
}
.page-hero .hero-inner {
  max-width: 900px;
}
.page-hero h1 {
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.02em;
  margin-bottom: 24px;
}
.page-hero h1 .highlight {
  color: var(--color-primary);
}
.page-hero p {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 42em;
  line-height: 1.7;
  margin-bottom: 32px;
}
.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  transition: all var(--transition-default);
  border: 1px solid transparent;
  line-height: 1.2;
}
.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}
.btn-primary {
  background: var(--color-primary);
  color: #111;
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(200, 160, 96, 0.25);
}
.btn-outline {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: var(--color-text);
}
.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}
.section {
  padding: 96px 0;
  border-bottom: 1px solid var(--color-border);
}
.section-header {
  margin-bottom: 56px;
  max-width: 700px;
}
.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(200, 160, 96, 0.12);
  margin-bottom: 16px;
}
.section-header h2 {
  font-size: clamp(1.75rem, 2.5vw, 2.5rem);
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: 16px;
}
.section-header p {
  color: var(--color-text-muted);
  font-size: 1rem;
  line-height: 1.75;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  border: 1px solid var(--color-border);
  transition: all var(--transition-default);
  position: relative;
}
.feature-card:hover {
  transform: translateY(-4px);
  background: var(--color-surface-hover);
  border-color: rgba(200, 160, 96, 0.3);
  box-shadow: var(--shadow-card-hover);
}
.feature-icon {
  font-size: 28px;
  margin-bottom: 20px;
  display: block;
}
.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
  line-height: 1.4;
}
.feature-card p {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}
.feature-line {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  color: var(--color-primary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: gap var(--transition-default);
}
.feature-card:hover .feature-line {
  gap: 14px;
}
.showcase {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  display: grid;
  grid-template-columns: 1fr 1fr;
  overflow: hidden;
  margin-bottom: 24px;
  transition: box-shadow var(--transition-default);
}
.showcase:hover {
  box-shadow: var(--shadow-card-hover);
}
.showcase-img {
  min-height: 300px;
}
.showcase-img img {
  width: 100%;
  height: 100%;
  min-height: 300px;
}
.showcase-body {
  padding: 48px 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.showcase-body .section-tag {
  align-self: flex-start;
}
.showcase-body h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 16px;
  line-height: 1.3;
}
.showcase-body p {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.75;
  margin-bottom: 20px;
}
.showcase-list {
  list-style: none;
  margin-bottom: 24px;
}
.showcase-list li {
  position: relative;
  padding-left: 20px;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.75;
  margin-bottom: 6px;
}
.showcase-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  opacity: 0.6;
}
.showcase.reverse .showcase-img {
  order: 2;
}
.showcase.reverse .showcase-body {
  order: 1;
}
.showcase-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-primary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: gap var(--transition-default);
}
.showcase-cta:hover {
  gap: 12px;
}
.stat-section {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding: 48px 0;
}
.stat-item {
  text-align: center;
}
.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  display: block;
  margin-bottom: 8px;
}
.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}
.steps-section {
  background: var(--color-bg);
}
.steps-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: steps;
}
.step-item {
  position: relative;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  border: 1px solid var(--color-border);
  counter-increment: steps;
  transition: all var(--transition-default);
}
.step-item:hover {
  transform: translateY(-4px);
  border-color: rgba(200, 160, 96, 0.3);
  box-shadow: var(--shadow-card);
}
.step-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  opacity: 0.6;
  display: block;
  margin-bottom: 12px;
  font-style: normal;
}
.step-item h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 10px;
}
.step-item p {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  line-height: 1.6;
}
.scene-section {
  background: var(--color-surface);
}
.scene-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.scene-card {
  background: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 32px;
  border: 1px solid var(--color-border);
  transition: all var(--transition-default);
}
.scene-card:hover {
  border-color: rgba(200, 160, 96, 0.3);
  box-shadow: var(--shadow-card);
}
.scene-card .scene-badge {
  display: inline-block;
  background: rgba(200, 160, 96, 0.12);
  color: var(--color-primary);
  font-size: 0.8rem;
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.scene-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
}
.scene-card p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
}
.faq-section {
  background: var(--color-bg);
}
.faq-list {
  max-width: 820px;
}
.faq-item {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color var(--transition-default);
}
.faq-item:hover {
  border-color: rgba(200, 160, 96, 0.25);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  text-align: left;
  font-size: 0.96rem;
  font-weight: 500;
  color: var(--color-text);
  background: transparent;
  transition: color var(--transition-default);
}
.faq-question:hover {
  color: var(--color-primary);
}
.faq-icon {
  width: 24px;
  height: 24px;
  position: relative;
  flex-shrink: 0;
  margin-left: 16px;
}
.faq-icon::before, .faq-icon::after {
  content: "";
  position: absolute;
  background: var(--color-primary);
  border-radius: 2px;
  transition: all var(--transition-default);
}
.faq-icon::before {
  width: 14px;
  height: 2px;
  top: 11px;
  left: 5px;
}
.faq-icon::after {
  width: 2px;
  height: 14px;
  top: 5px;
  left: 11px;
}
.faq-item.open .faq-icon::after {
  transform: rotate(90deg);
  opacity: 0;
}
.faq-item.open .faq-icon::before {
  background: var(--color-primary-hover);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 24px;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.75;
}
.faq-item.open .faq-answer {
  max-height: 400px;
  padding: 0 24px 24px;
}
.cta-panel {
  background: linear-gradient(135deg, rgba(200, 160, 96, 0.1), rgba(15, 15, 16, 0.8)), var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(200, 160, 96, 0.2);
  padding: 64px 48px;
  text-align: center;
}
.cta-panel h2 {
  font-size: clamp(1.75rem, 2.5vw, 2.25rem);
  font-weight: 600;
  margin-bottom: 16px;
}
.cta-panel p {
  color: var(--color-text-muted);
  max-width: 560px;
  margin: 0 auto 32px;
  font-size: 1rem;
}
.site-footer {
  background: #0A0A0B;
  border-top: 1px solid var(--color-border);
  padding: 64px 0 0;
  margin-top: auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--color-text);
}
.footer-brand p {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  line-height: 1.7;
  max-width: 340px;
}
.footer-col h4 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}
.footer-col a {
  display: block;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  padding: 4px 0;
  transition: color var(--transition-default), padding-left var(--transition-default);
}
.footer-col a:hover {
  color: var(--color-primary);
  padding-left: 4px;
}
.footer-restore {
  display: block;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  padding: 4px 0;
  transition: color var(--transition-default);
  background: none;
  border: none;
  text-align: left;
}
.footer-restore:hover {
  color: var(--color-primary);
}
.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-copyright {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}
.footer-copyright a {
  color: var(--color-text-muted);
}
.footer-copyright a:hover {
  color: var(--color-primary);
}
#restoreCtaFooter {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  background: none;
  border: none;
  cursor: pointer;
}
#restoreCtaFooter:hover {
  color: var(--color-primary);
}
.bottom-cta {
  position: fixed;
  bottom: 0;
  left: var(--nav-width);
  right: 0;
  z-index: 50;
  background: rgba(15, 15, 16, 0.92);
  backdrop-filter: blur(8px);
  border-top: 1px solid var(--color-border);
  padding: 12px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  transform: translateY(0);
  transition: transform 0.3s ease;
}
.bottom-cta.hidden {
  transform: translateY(100%);
}
.bottom-cta-text {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.bottom-cta .btn {
  padding: 10px 24px;
  font-size: 0.875rem;
  flex-shrink: 0;
}
.bottom-cta-close {
  width: 28px;
  height: 28px;
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 1.2rem;
  cursor: pointer;
  flex-shrink: 0;
  transition: color var(--transition-default);
}
.bottom-cta-close:hover {
  color: var(--color-danger);
}
.main-content .section:last-of-type {
  padding-bottom: 120px;
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html {
    scroll-behavior: auto;
  }
}
@media (max-width: 1200px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .stat-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}
@media (max-width: 991px) {
  .side-nav {
    display: none;
  }
  .main-content {
    margin-left: 0;
  }
  .top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--topbar-height);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 0 20px;
    position: sticky;
    top: 0;
    z-index: 80;
  }
  .top-bar .logo-area {
    height: auto;
    border: none;
    padding: 0;
  }
  .top-bar .logo-area .logo-dot {
    width: 8px;
    height: 8px;
  }
  .top-bar .logo-area .logo-text {
    font-size: 1rem;
    font-weight: 600;
  }
  .hamburger {
    width: 40px;
    height: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
  }
  .hamburger span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all 0.3s ease;
  }
  .bottom-cta {
    left: 0;
    padding: 10px 16px;
    height: 72px;
  }
  .mobile-drawer {
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    height: 100vh;
    background: var(--color-bg);
    z-index: 200;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--color-border);
  }
  .mobile-drawer.open {
    transform: translateX(0);
  }
  .drawer-header {
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    border-bottom: 1px solid var(--color-border);
  }
  .drawer-close {
    width: 36px;
    height: 36px;
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: 1.3rem;
    cursor: pointer;
  }
  .drawer-close:hover {
    color: var(--color-primary);
  }
  .drawer-menu {
    flex: 1;
    overflow-y: auto;
    padding: 16px 0;
  }
  .drawer-menu .menu-item {
    padding: 14px 24px;
  }
  .drawer-menu .menu-label {
    padding: 16px 24px 8px;
  }
  .drawer-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 150;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease;
  }
  .drawer-overlay.show {
    opacity: 1;
    visibility: visible;
  }
  .feature-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .steps-list {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  .scene-grid {
    grid-template-columns: 1fr;
  }
  .showcase {
    grid-template-columns: 1fr;
  }
  .showcase-img, .showcase-img img {
    min-height: 220px;
  }
  .showcase.reverse .showcase-img {
    order: 1;
  }
  .showcase.reverse .showcase-body {
    order: 2;
  }
  .showcase-body {
    padding: 32px 24px;
  }
  .section {
    padding: 64px 0;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}
@media (max-width: 767px) {
  .container {
    padding: 0 16px;
  }
  .page-hero {
    min-height: 360px;
    padding: 40px 0;
  }
  .page-hero h1 {
    font-size: 2rem;
  }
  .page-hero p {
    font-size: 1rem;
  }
  .btn {
    padding: 12px 24px;
    font-size: 0.9rem;
  }
  .stat-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    padding: 32px 0;
  }
  .stat-number {
    font-size: 1.75rem;
  }
  .steps-list {
    grid-template-columns: 1fr;
  }
  .section-header h2 {
    font-size: 1.6rem;
  }
  .cta-panel {
    padding: 40px 24px;
  }
  .feature-card {
    padding: 24px 20px;
  }
  .scene-card {
    padding: 24px 20px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .bottom-cta {
    height: 72px;
  }
  .bottom-cta-text {
    font-size: 0.8rem;
    max-width: 160px;
  }
  .bottom-cta .btn {
    padding: 8px 16px;
    font-size: 0.8rem;
  }
}
@media (max-width: 520px) {
  .container {
    padding: 0 12px;
  }
  .hero-cta {
    flex-direction: column;
    width: 100%;
  }
  .hero-cta .btn {
    width: 100%;
  }
  .stat-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  .stat-number {
    font-size: 1.5rem;
  }
  .showcase-body {
    padding: 24px 16px;
  }
  .cta-panel {
    padding: 32px 16px;
  }
  .bottom-cta-text {
    max-width: 120px;
  }
}

/* roulang page: category3 */
/* ============ 设计变量 ============ */
:root {
  --color-bg: #0F0F10;
  --color-surface: #18181A;
  --color-surface-hover: #202023;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-strong: rgba(255, 255, 255, 0.16);
  --color-text: #F5F3EF;
  --color-text-muted: #A8A5A0;
  --color-primary: #C8A060;
  --color-primary-hover: #D9B87C;
  --color-accent: #4E9F7D;
  --color-danger: #C96A55;
  --font-sans: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.55);
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

input, textarea {
  font-family: inherit;
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4 {
  line-height: 1.3;
  font-weight: 600;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

::selection {
  background: rgba(200, 160, 96, 0.3);
  color: var(--color-text);
}

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ============ 左侧导航 ============ */
.side-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 260px;
  height: 100vh;
  background: var(--color-bg);
  border-right: 1px solid var(--color-border);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  transition: transform 0.35s ease;
}

.logo-area {
  height: 72px;
  display: flex;
  align-items: center;
  padding: 0 32px;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-primary);
  display: inline-block;
  flex-shrink: 0;
  box-shadow: 0 0 0 3px rgba(200, 160, 96, 0.2);
}

.logo-text {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-text);
  white-space: nowrap;
}

.side-nav {
  flex: 1;
  padding: 24px 0;
  overflow-y: auto;
}

.menu-label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  opacity: 0.55;
  padding: 16px 32px 8px;
  font-weight: 400;
}

.menu-item {
  display: flex;
  align-items: center;
  padding: 14px 32px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  transition: all var(--transition);
  position: relative;
  border-left: 2px solid transparent;
}

.menu-item:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.03);
}

.menu-item.active {
  color: var(--color-text);
  border-left-color: var(--color-primary);
  background: linear-gradient(90deg, rgba(200, 160, 96, 0.08), transparent);
}

.menu-item.active i {
  color: var(--color-primary);
}

.menu-item i {
  width: 20px;
  margin-right: 10px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

.side-footer {
  padding: 20px 32px;
  border-top: 1px solid var(--color-border);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  opacity: 0.5;
}

/* ============ 移动端顶部栏 ============ */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: rgba(15, 15, 16, 0.95);
  backdrop-filter: blur(8px);
  z-index: 999;
  align-items: center;
  padding: 0 20px;
  border-bottom: 1px solid var(--color-border);
}

.mobile-header .logo-link {
  height: 100%;
}

.mobile-header .logo-text {
  font-size: 1rem;
}

.mobile-hamburger {
  width: 44px;
  height: 44px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  transition: background var(--transition);
}

.mobile-hamburger:hover {
  background: var(--color-surface-hover);
}

.mobile-hamburger span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.mobile-hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-hamburger.active span:nth-child(2) {
  opacity: 0;
}

.mobile-hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}

.sidebar-overlay.show {
  opacity: 1;
  visibility: visible;
}

/* ============ 主内容区 ============ */
.main-wrapper {
  margin-left: 260px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding-bottom: 80px;
}

main {
  flex: 1;
}

/* ============ Hero ============ */
.category-hero {
  position: relative;
  min-height: 72vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
}

.category-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15, 15, 16, 0.92) 0%, rgba(15, 15, 16, 0.55) 60%, rgba(15, 15, 16, 0.8) 100%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 1240px;
  width: 100%;
  margin: 0 auto;
  padding: 80px 32px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(200, 160, 96, 0.12);
  border: 1px solid rgba(200, 160, 96, 0.25);
  color: var(--color-primary);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 24px;
  letter-spacing: 0.04em;
}

.hero-badge i {
  font-size: 0.75rem;
}

.category-hero h1 {
  font-size: clamp(2.25rem, 4vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.02em;
  margin-bottom: 20px;
  color: var(--color-text);
  animation: fadeUp 0.6s ease both;
}

.category-hero h1 .brand-highlight {
  color: var(--color-primary);
}

.hero-subtitle {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--color-text-muted);
  max-width: 42em;
  margin-bottom: 36px;
  animation: fadeUp 0.6s ease 0.15s both;
}

.hero-ctas {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeUp 0.6s ease 0.3s both;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
  line-height: 1.4;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: #1a1a1a;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(200, 160, 96, 0.3);
}

.btn-outline {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.3);
  color: var(--color-text);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

.btn-large {
  padding: 16px 40px;
  font-size: 1rem;
}

/* ============ 数据条 ============ */
.stats-bar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  padding: 48px 0;
}

.stat-item {
  text-align: center;
  padding: 16px;
  position: relative;
}

.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 48px;
  background: var(--color-border);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
  display: block;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* ============ 板块共通 ============ */
.section {
  padding: 96px 0;
}

.section-header {
  margin-bottom: 48px;
  max-width: 720px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 12px;
  font-weight: 600;
  background: rgba(200, 160, 96, 0.1);
  padding: 4px 14px;
  border-radius: 999px;
  border: 1px solid rgba(200, 160, 96, 0.2);
}

.section-header h2 {
  font-size: clamp(1.75rem, 2.5vw, 2.5rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 12px;
  letter-spacing: 0.01em;
}

.section-header p {
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ============ 垂直清单式卖点 ============ */
.features-section {
  background: var(--color-bg);
}

.features-list {
  display: flex;
  flex-direction: column;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 32px;
  padding: 48px 24px;
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition);
  position: relative;
}

.feature-item:hover {
  background: rgba(255, 255, 255, 0.02);
}

.feature-item:first-child {
  border-top: 1px solid var(--color-border);
}

.feature-number {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  min-width: 56px;
  opacity: 0.85;
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(200, 160, 96, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 1.1rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.feature-content {
  flex: 1;
}

.feature-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text);
}

.feature-content p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 640px;
}

.feature-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-top: 14px;
  transition: all var(--transition);
}

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

.feature-link i {
  font-size: 0.8rem;
  transition: transform var(--transition);
}

.feature-link:hover i {
  transform: translateX(4px);
}

.feature-arrow {
  align-self: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  transition: all var(--transition);
  flex-shrink: 0;
}

.feature-item:hover .feature-arrow {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateX(4px);
}

/* ============ 内容方向（交错图文） ============ */
.directions-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.content-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 72px;
}

.content-row:last-child {
  margin-bottom: 0;
}

.content-row.reverse .row-image {
  order: 2;
}

.content-row.reverse .row-text {
  order: 1;
}

.row-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  aspect-ratio: 4 / 3;
}

.row-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.row-image:hover img {
  transform: scale(1.03);
}

.row-text .row-tag {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: 0.06em;
}

.row-text h3 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 14px;
  line-height: 1.3;
}

.row-text p {
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.row-features {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.row-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.row-features li i {
  color: var(--color-accent);
  font-size: 0.85rem;
  width: 18px;
  text-align: center;
}

.row-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.95rem;
  transition: gap var(--transition);
}

.row-link:hover {
  gap: 14px;
}

.row-link i {
  font-size: 0.8rem;
}

/* ============ 热门专题卡片 ============ */
.topics-section {
  background: var(--color-bg);
}

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

.topic-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.topic-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), rgba(200, 160, 96, 0.1));
  opacity: 0;
  transition: opacity var(--transition);
}

.topic-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(200, 160, 96, 0.3);
}

.topic-card:hover::before {
  opacity: 1;
}

.topic-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(200, 160, 96, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 1rem;
  margin-bottom: 16px;
}

.topic-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text);
}

.topic-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.topic-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  opacity: 0.7;
  border-top: 1px solid var(--color-border);
  padding-top: 14px;
}

.topic-meta i {
  font-size: 0.75rem;
  margin-right: 4px;
}

/* ============ 覆盖范围网格 ============ */
.coverage-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.coverage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.coverage-item {
  background: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.coverage-item:hover {
  border-color: rgba(200, 160, 96, 0.35);
  box-shadow: var(--shadow-card);
}

.coverage-item i {
  font-size: 1.4rem;
  color: var(--color-primary);
  margin-bottom: 14px;
  display: block;
}

.coverage-item h4 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.coverage-item p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

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

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

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
  transition: border-color var(--transition);
}

.faq-item:hover {
  border-color: rgba(200, 160, 96, 0.25);
}

.faq-item.open {
  border-color: rgba(200, 160, 96, 0.35);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 28px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  transition: color var(--transition);
  gap: 16px;
}

.faq-question:hover {
  color: var(--color-primary);
}

.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  transition: all 0.3s ease;
  flex-shrink: 0;
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-answer-inner {
  padding: 0 28px 24px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  border-top: 1px solid var(--color-border);
  padding-top: 20px;
}

/* ============ CTA ============ */
.cta-section {
  position: relative;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  padding: 120px 0;
  text-align: center;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15, 15, 16, 0.92), rgba(15, 15, 16, 0.7));
}

.cta-content {
  position: relative;
  z-index: 2;
  max-width: 640px;
  margin: 0 auto;
  padding: 0 32px;
}

.cta-content h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-content p {
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 32px;
}

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

/* ============ 底部固定转化条 ============ */
.bottom-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 997;
  height: 64px;
  background: rgba(15, 15, 16, 0.92);
  backdrop-filter: blur(8px);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  transition: transform 0.4s ease;
}

.bottom-cta.hidden {
  transform: translateY(100%);
}

.bottom-cta-inner {
  max-width: 1240px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.bottom-cta-text {
  font-size: 0.95rem;
  color: var(--color-text);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.bottom-cta-text span {
  color: var(--color-primary);
}

.bottom-cta .btn {
  padding: 10px 24px;
  font-size: 0.875rem;
  flex-shrink: 0;
}

.cta-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.8rem;
  transition: all var(--transition);
  flex-shrink: 0;
}

.cta-close:hover {
  border-color: var(--color-danger);
  color: var(--color-danger);
}

/* ============ 页脚 ============ */
.site-footer {
  background: #0A0A0B;
  border-top: 1px solid var(--color-border);
  padding: 72px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}

.footer-col a {
  display: block;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  padding: 5px 0;
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-copyright {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.footer-copyright a {
  color: var(--color-text-muted);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.footer-copyright a:hover {
  color: var(--color-primary);
}

.footer-restore {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition);
}

.footer-restore:hover {
  color: var(--color-primary);
}

/* ============ 响应式 ============ */
@media (max-width: 991px) {
  .side-menu {
    transform: translateX(-100%);
    width: 280px;
    box-shadow: 0 0 60px rgba(0, 0, 0, 0.5);
  }

  .side-menu.open {
    transform: translateX(0);
  }

  .mobile-header {
    display: flex;
  }

  .main-wrapper {
    margin-left: 0;
    padding-top: 64px;
  }

  .category-hero {
    min-height: 60vh;
  }

  .hero-inner {
    padding: 60px 24px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px 0;
    padding: 32px 0;
  }

  .stat-item:nth-child(2)::after {
    display: none;
  }

  .content-row {
    grid-template-columns: 1fr;
    gap: 32px;
    margin-bottom: 56px;
  }

  .content-row.reverse .row-image {
    order: 0;
  }

  .content-row.reverse .row-text {
    order: 0;
  }

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

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

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

@media (max-width: 767px) {
  .section {
    padding: 64px 0;
  }

  .container {
    padding: 0 16px;
  }

  .category-hero {
    min-height: 50vh;
  }

  .hero-inner {
    padding: 48px 16px;
  }

  .category-hero h1 {
    font-size: 2rem;
  }

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

  .hero-ctas .btn {
    width: 100%;
    justify-content: center;
  }

  .feature-item {
    flex-direction: column;
    gap: 16px;
    padding: 32px 16px;
  }

  .feature-number {
    font-size: 1.75rem;
  }

  .feature-arrow {
    display: none;
  }

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

  .faq-question {
    padding: 18px 16px;
    font-size: 0.95rem;
  }

  .faq-answer-inner {
    padding: 0 16px 20px;
    padding-top: 16px;
    font-size: 0.9rem;
  }

  .bottom-cta {
    height: 80px;
    padding: 0 16px;
  }

  .bottom-cta-text {
    max-width: 60%;
    font-size: 0.85rem;
  }

  .bottom-cta .btn {
    padding: 8px 16px;
    font-size: 0.8rem;
  }

  .cta-section {
    padding: 80px 0;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
    margin-bottom: 32px;
  }

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

@media (max-width: 520px) {
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .stat-number {
    font-size: 1.75rem;
  }

  .stat-label {
    font-size: 0.75rem;
  }

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

  .topic-card {
    padding: 20px;
  }

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

/* ============ 减动效 ============ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}