/* roulang page: index */
:root {
  --bg: #0A0C0E;
  --panel: #14171D;
  --card: #1C2128;
  --primary: #C7FF3A;
  --primary-hover: #D9FF70;
  --accent: #8CE8B0;
  --text: #EAF0F4;
  --text-secondary: #9AA4AE;
  --text-muted: #5E6872;
  --border: #252B33;
  --success: #47D47E;
  --warning: #FFB85C;
  --error: #FF6B6B;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 8px;
  --shadow-card: 0 18px 40px rgba(0,0,0,0.35);
  --shadow-btn: 0 0 24px rgba(199,255,58,0.2);
  --transition: 0.25s cubic-bezier(0.22, 1, 0.36, 1);
  --font-main: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'Roboto Mono', 'JetBrains Mono', 'Courier New', monospace;
  --container: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul, ol {
  list-style: none;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: clamp(16px, 4vw, 40px);
  padding-right: clamp(16px, 4vw, 40px);
}

.page-section {
  padding: clamp(72px, 10vw, 128px) 0;
}

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

.section-header .section-tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 999px;
  background: rgba(199,255,58,0.1);
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 12px;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 14px 28px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition);
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--primary);
  color: #0A0C0E;
  box-shadow: var(--shadow-btn);
}

.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 0 32px rgba(199,255,58,0.3);
  transform: scale(1.02);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border-color: rgba(255,255,255,0.25);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: scale(1.02);
}

.btn-lg {
  padding: 18px 40px;
  font-size: 1.05rem;
  border-radius: 12px;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.85rem;
  border-radius: 8px;
}

.btn-link {
  background: none;
  border: none;
  padding: 8px 4px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  cursor: pointer;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color var(--transition), transform var(--transition);
}

.btn-link:hover {
  color: var(--primary);
  transform: translateX(4px);
}

.btn-link .icon {
  font-size: 0.8rem;
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text-secondary);
}

.badge-official {
  background: rgba(199,255,58,0.12);
  border-color: rgba(199,255,58,0.3);
  color: var(--primary);
}

.badge-safe {
  background: rgba(71,212,126,0.12);
  border-color: rgba(71,212,126,0.3);
  color: var(--success);
}

.badge-update {
  background: rgba(255,184,92,0.12);
  border-color: rgba(255,184,92,0.3);
  color: var(--warning);
}

/* Topbar */
.topbar {
  background: #07080A;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  height: 36px;
  display: flex;
  align-items: center;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.topbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.topbar-left .domain {
  font-family: var(--font-mono);
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.topbar-left .official-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 10px;
  border-radius: 999px;
  background: rgba(199,255,58,0.1);
  color: var(--primary);
  font-size: 0.7rem;
  font-weight: 600;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 18px;
}

.topbar-right a {
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color var(--transition);
}

.topbar-right a:hover {
  color: var(--primary);
}

.topbar-right i {
  font-size: 0.7rem;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: 64px;
  background: rgba(10,12,14,0.85);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255,255,255,0.04);
  transition: box-shadow 0.3s ease, background 0.3s ease;
}

.navbar.scrolled {
  box-shadow: 0 8px 30px rgba(0,0,0,0.4);
  background: rgba(10,12,14,0.92);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  color: #0A0C0E;
  font-size: 1rem;
  box-shadow: 0 0 16px rgba(199,255,58,0.3);
}

.logo-text {
  line-height: 1.2;
}

.logo-text .logo-main {
  font-size: 1.15rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--text);
  display: block;
}

.logo-text .logo-sub {
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  font-weight: 400;
}

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

.nav-item .nav-link {
  display: block;
  padding: 8px 16px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 8px;
  position: relative;
  letter-spacing: 0.02em;
  transition: color var(--transition), background var(--transition);
}

.nav-item .nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 16px;
  right: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.3s ease;
}

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

.nav-item .nav-link:hover::after {
  transform: scaleX(1);
}

.nav-item.active .nav-link {
  color: var(--primary);
}

.nav-item.active .nav-link::after {
  transform: scaleX(1);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.nav-hamburger {
  display: none;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: 0 6px;
}

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

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

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

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

.mobile-menu {
  display: none;
  position: fixed;
  top: 100px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10,12,14,0.98);
  backdrop-filter: blur(24px);
  z-index: 999;
  padding: 32px clamp(16px, 4vw, 40px);
  flex-direction: column;
  gap: 8px;
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu a {
  padding: 16px 12px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mobile-menu a.active {
  color: var(--primary);
}

.mobile-menu .mobile-cta {
  margin-top: 24px;
  background: var(--primary);
  color: #0A0C0E;
  border-radius: 12px;
  text-align: center;
  padding: 16px;
  border-bottom: none;
  font-weight: 700;
  justify-content: center;
}

/* Hero */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--bg);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  z-index: 0;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(10,12,14,0.92) 0%, rgba(10,12,14,0.72) 45%, rgba(10,12,14,0.45) 100%),
    radial-gradient(ellipse at 70% 50%, rgba(199,255,58,0.08) 0%, transparent 60%);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.4;
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 60px;
  padding-top: 40px;
  padding-bottom: 40px;
}

.hero-left {
  padding-right: 20px;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.hero h1 {
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  line-height: 1.12;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 20px;
}

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

.hero-subtitle {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: 32px;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  margin-bottom: 32px;
}

.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.hero-trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.hero-trust-item i {
  color: var(--success);
  font-size: 0.9rem;
}

.hero-right {
  position: relative;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-visual .main-img {
  width: 100%;
  max-width: 460px;
  border-radius: 24px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.6);
  border: 1px solid rgba(255,255,255,0.08);
  transform: perspective(1000px) rotateY(-8deg) rotateX(2deg);
  transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.hero-visual .main-img:hover {
  transform: perspective(1000px) rotateY(-3deg) rotateX(1deg);
}

.hero-float-card {
  position: absolute;
  background: rgba(20,23,29,0.9);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 14px;
  padding: 14px 18px;
  box-shadow: 0 12px 36px rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  gap: 12px;
}

.hero-float-card .card-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
}

.hero-float-card .card-icon.success {
  background: rgba(71,212,126,0.15);
  color: var(--success);
}

.hero-float-card .card-icon.warning {
  background: rgba(255,184,92,0.15);
  color: var(--warning);
}

.hero-float-card .card-text {
  line-height: 1.3;
}

.hero-float-card .card-text .title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
  display: block;
}

.hero-float-card .card-text .sub {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.float-1 {
  top: 30px;
  left: -20px;
}

.float-2 {
  bottom: 40px;
  right: -10px;
}

/* Trust Bar */
.trust-bar {
  background: #08090B;
  border-top: 1px solid rgba(255,255,255,0.04);
  border-bottom: 1px solid rgba(255,255,255,0.04);
  padding: 0;
  min-height: 48px;
  display: flex;
  align-items: center;
}

.trust-bar .container {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 40px;
  width: 100%;
  padding-top: 12px;
  padding-bottom: 12px;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.trust-item i {
  color: var(--primary);
  font-size: 0.8rem;
}

.trust-separator {
  width: 1px;
  height: 16px;
  background: var(--border);
  display: inline-block;
}

/* Value Section */
.value-section {
  background: var(--bg);
}

.value-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
}

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

.value-row.reverse .value-img {
  order: 2;
}

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

.value-img {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.08);
}

.value-img img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  transition: transform 0.6s ease;
}

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

.value-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(10,12,14,0.4) 100%);
}

.value-text h3 {
  font-size: clamp(1.3rem, 2vw, 1.6rem);
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.value-text p {
  color: var(--text-secondary);
  line-height: 1.75;
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.value-feature-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 20px;
}

.value-feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.value-feature-list li i {
  color: var(--primary);
  font-size: 0.8rem;
  margin-top: 6px;
}

/* Screenshot Carousel */
.screenshot-section {
  background: var(--panel);
  position: relative;
  overflow: hidden;
}

.screenshot-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(199,255,58,0.04) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.5;
}

.screenshot-section .container {
  position: relative;
}

.screenshot-track {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  padding: 8px 4px 24px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.screenshot-track::-webkit-scrollbar {
  height: 6px;
}

.screenshot-track::-webkit-scrollbar-track {
  background: rgba(255,255,255,0.03);
  border-radius: 3px;
}

.screenshot-track::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.12);
  border-radius: 3px;
}

.screenshot-card {
  flex: 0 0 300px;
  scroll-snap-align: start;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.08);
  background: var(--card);
  transition: transform 0.4s ease, border-color 0.4s ease;
}

.screenshot-card:hover {
  transform: translateY(-6px);
  border-color: var(--primary);
}

.screenshot-card .shot-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: #0d0f12;
}

.screenshot-card .shot-info {
  padding: 16px 18px;
}

.screenshot-card .shot-info h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}

.screenshot-card .shot-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.carousel-indicators {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 12px;
}

.carousel-indicators .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  transition: background 0.3s ease, transform 0.3s ease;
  cursor: pointer;
}

.carousel-indicators .dot.active {
  background: var(--primary);
  transform: scale(1.3);
}

/* System Requirements */
.sysreq-section {
  background: var(--bg);
}

.sysreq-panel {
  background: var(--panel);
  border-radius: 24px;
  border: 1px solid rgba(255,255,255,0.06);
  padding: clamp(32px, 6vw, 64px);
  position: relative;
  overflow: hidden;
}

.sysreq-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), transparent);
}

.sysreq-panel h3 {
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  font-weight: 700;
  margin-bottom: 8px;
}

.sysreq-panel > p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 32px;
}

.sysreq-table {
  display: flex;
  flex-direction: column;
}

.sysreq-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  gap: 20px;
  flex-wrap: wrap;
}

.sysreq-row:last-child {
  border-bottom: none;
}

.sysreq-row .req-label {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.sysreq-row .req-label i {
  color: var(--primary);
  font-size: 0.9rem;
  width: 20px;
  text-align: center;
}

.sysreq-row .req-value {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text);
}

.sysreq-row .req-support {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-left: 44px;
  display: block;
  margin-top: 4px;
}

.sysreq-note {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 32px;
  padding: 12px 16px;
  border-radius: 10px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.sysreq-note i {
  color: var(--warning);
}

/* Testimonial */
.testimonial-section {
  background: var(--panel);
}

.testimonial-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
}

.testimonial-card {
  background: var(--card);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.testimonial-card:hover {
  border-color: rgba(199,255,58,0.4);
  box-shadow: var(--shadow-card);
}

.testimonial-card.large {
  grid-row: span 2;
  padding: 40px;
}

.testimonial-card .quote-icon {
  font-size: 1.5rem;
  color: var(--primary);
  opacity: 0.5;
  margin-bottom: 16px;
}

.testimonial-card .quote-text {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text);
  flex-grow: 1;
  margin-bottom: 24px;
}

.testimonial-card .quote-footer {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.testimonial-card .quote-footer .avatar {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: rgba(199,255,58,0.12);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
}

.testimonial-card .quote-footer .name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  display: block;
  line-height: 1.3;
}

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

.stars {
  color: var(--warning);
  font-size: 0.8rem;
  margin-top: 8px;
  letter-spacing: 2px;
}

/* News Section */
.news-section {
  background: var(--bg);
}

.news-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.news-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px 24px;
  background: rgba(28,33,40,0.5);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 14px;
  transition: border-color 0.3s ease, background 0.3s ease, transform 0.3s ease;
}

.news-card:hover {
  border-color: var(--primary);
  background: rgba(28,33,40,0.8);
  transform: translateX(4px);
}

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

.news-tag {
  flex-shrink: 0;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  background: rgba(199,255,58,0.1);
  color: var(--primary);
  border: 1px solid rgba(199,255,58,0.2);
  white-space: nowrap;
}

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

.news-info h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color 0.2s ease;
}

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

.news-info p {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.5;
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

.news-date {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  white-space: nowrap;
}

.news-arrow {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: transform 0.3s ease, color 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255,255,255,0.04);
}

.news-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  background: rgba(28,33,40,0.4);
  border: 1px dashed rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  color: var(--text-muted);
  font-size: 0.9rem;
}

.news-empty i {
  font-size: 2rem;
  margin-bottom: 12px;
  opacity: 0.4;
}

.news-view-all {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.3s ease, gap 0.3s ease;
}

.news-view-all:hover {
  color: var(--primary);
  gap: 12px;
}

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

.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.faq-item.active {
  border-color: rgba(199,255,58,0.3);
  box-shadow: 0 8px 30px rgba(0,0,0,0.25);
}

.faq-item.active .faq-header h3 {
  color: var(--primary);
}

.faq-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  cursor: pointer;
  transition: background 0.3s ease;
}

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

.faq-header h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.5;
  flex: 1;
  transition: color 0.3s ease;
}

.faq-toggle {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: var(--text-secondary);
  flex-shrink: 0;
  transition: transform 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

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

.faq-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.faq-body-inner {
  padding: 0 24px 24px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
  border-top: 1px solid rgba(255,255,255,0.05);
  margin-top: 0;
  padding-top: 20px;
}

/* CTA / Download */
.download-section {
  background: var(--bg);
  position: relative;
  overflow: hidden;
}

.download-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  opacity: 0.1;
}

.download-section::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(199,255,58,0.06) 0%, transparent 70%);
}

.download-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 760px;
  margin: 0 auto;
  padding: clamp(48px, 8vw, 80px) 0;
}

.download-inner h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.download-inner p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 32px;
}

.download-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  margin-bottom: 36px;
}

.download-version {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.download-version span {
  display: flex;
  align-items: center;
  gap: 8px;
}

.download-version .ver {
  color: var(--text-secondary);
}

.download-note {
  margin-top: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.download-note i {
  color: var(--success);
}

/* Footer */
.footer {
  background: #08090B;
  border-top: 1px solid rgba(255,255,255,0.04);
  padding-top: 64px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}

.footer-brand .logo-text {
  margin-bottom: 16px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.82rem;
  line-height: 1.7;
  margin-bottom: 20px;
}

.footer-brand .btn {
  padding: 10px 20px;
  font-size: 0.82rem;
}

.footer-column h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}

.footer-column ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-column ul a {
  font-size: 0.82rem;
  color: var(--text-muted);
  transition: color 0.3s ease, padding-left 0.3s ease;
}

.footer-column ul a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.footer-contact {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.footer-contact i {
  color: var(--primary);
  margin-right: 6px;
  width: 14px;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.04);
  padding: 20px 0;
}

.footer-bottom .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom .copyright {
  font-size: 0.75rem;
  color: var(--text-muted);
}

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

.footer-bottom .footer-links {
  display: flex;
  gap: 20px;
}

.footer-bottom .footer-links a {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1), transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html {
    scroll-behavior: auto;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
  .hero-visual .main-img,
  .hero-visual .main-img:hover {
    transform: none;
  }
  .news-card:hover {
    transform: none;
  }
  .screenshot-card:hover {
    transform: none;
  }
}

/* Responsive */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-left {
    padding-right: 0;
  }
  .hero-right {
    order: 2;
  }
  .hero-visual .main-img {
    max-width: 380px;
  }
  .value-row {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .value-row.reverse .value-img {
    order: 1;
  }
  .value-row.reverse .value-text {
    order: 2;
  }
  .testimonial-grid {
    grid-template-columns: 1fr;
  }
  .testimonial-card.large {
    grid-row: span 1;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 769px) {
  .mobile-menu {
    display: none !important;
  }
}

@media (max-width: 768px) {
  .topbar-right a span {
    display: none;
  }
  .topbar-right a i {
    font-size: 0.85rem;
  }
  .nav-menu {
    display: none;
  }
  .nav-cta .btn-sm {
    display: none;
  }
  .nav-hamburger {
    display: flex;
  }
  .hero {
    min-height: auto;
    padding: 40px 0 60px;
  }
  .hero h1 {
    font-size: clamp(1.7rem, 4vw, 2.4rem);
  }
  .hero-buttons {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-buttons .btn {
    width: 100%;
  }
  .hero-float-card {
    display: none;
  }
  .trust-bar .container {
    gap: 8px 16px;
  }
  .trust-separator {
    display: none;
  }
  .value-img img {
    height: 220px;
  }
  .screenshot-card {
    flex-basis: 260px;
  }
  .sysreq-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .sysreq-row .req-support {
    margin-left: 32px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom .container {
    flex-direction: column;
    text-align: center;
  }
  .news-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .news-meta {
    width: 100%;
    justify-content: space-between;
  }
}

@media (max-width: 520px) {
  .page-section {
    padding: 56px 0;
  }
  .section-header h2 {
    font-size: 1.4rem;
  }
  .download-buttons {
    flex-direction: column;
  }
  .download-buttons .btn {
    width: 100%;
  }
  .testimonial-card.large {
    padding: 24px;
  }
  .testimonial-card {
    padding: 24px;
  }
  .faq-header h3 {
    font-size: 0.9rem;
  }
  .hero-badges {
    gap: 6px;
  }
}

/* roulang page: article */
:root {
  --bg: #0A0C0E;
  --bg-panel: #14171D;
  --bg-card: #1C2128;
  --primary: #C7FF3A;
  --primary-hover: #D9FF70;
  --accent: #8CE8B0;
  --text: #EAF0F4;
  --text-2: #9AA4AE;
  --text-3: #5E6872;
  --border: #252B33;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-pill: 999px;
  --shadow-card: 0 18px 40px rgba(0,0,0,0.35);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --topbar-h: 36px;
  --nav-h: 64px;
  --container: 1200px;
  --section-gap: clamp(56px, 8vw, 96px);
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-padding-top: 80px;
  -webkit-text-size-adjust: 100%;
}
body {
  background: var(--bg);
  color: var(--text);
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 0.95rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(10,12,14,0.94) 0%, rgba(10,12,14,1) 60%),
    url('/assets/images/backpic/back-2.webp') center top / cover no-repeat;
  opacity: 0.5;
  pointer-events: none;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}
ul, ol {
  list-style: none;
}
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: clamp(16px, 4vw, 40px);
  padding-right: clamp(16px, 4vw, 40px);
}

/* ===== Topbar ===== */
.topbar {
  height: var(--topbar-h);
  background: rgba(0,0,0,0.5);
  border-bottom: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--text-2);
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.topbar-left,
.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}
.topbar-domain {
  font-family: "Roboto Mono", "JetBrains Mono", monospace;
  letter-spacing: 0.02em;
  color: var(--text);
}
.badge-official {
  background: rgba(199,255,58,0.12);
  border: 1px solid rgba(199,255,58,0.3);
  color: var(--primary);
  font-size: 0.7rem;
  padding: 1px 10px;
  border-radius: var(--radius-pill);
  font-weight: 600;
}
.topbar-link {
  color: var(--text-2);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: color 0.25s;
}
.topbar-link:hover {
  color: var(--primary);
}
.topbar-link i {
  font-size: 0.7rem;
}

/* ===== Navbar ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: rgba(10,12,14,0.86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.35s var(--ease);
}
.navbar.scrolled {
  box-shadow: 0 12px 32px rgba(0,0,0,0.35);
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary);
  color: var(--bg);
  font-weight: 900;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px rgba(199,255,58,0.2);
}
.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.logo-main {
  font-size: 1.1rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: var(--text);
}
.logo-sub {
  font-size: 0.68rem;
  color: var(--text-3);
  letter-spacing: 0.08em;
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-item {
  position: relative;
}
.nav-link {
  display: inline-block;
  padding: 8px 14px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-2);
  border-radius: 8px;
  letter-spacing: 0.02em;
  transition: color 0.25s, background 0.25s;
}
.nav-link:hover {
  color: var(--text);
}
.nav-item.active .nav-link {
  color: var(--primary);
}
.nav-item.active .nav-link::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 14px;
  right: 14px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
}
.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.875rem;
  line-height: 1;
  padding: 11px 22px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s, border-color 0.25s;
  white-space: nowrap;
}
.btn i {
  font-size: 0.9rem;
}
.btn-primary {
  background: var(--primary);
  color: var(--bg);
  box-shadow: 0 0 24px rgba(199,255,58,0.15);
}
.btn-primary:hover {
  background: var(--primary-hover);
  transform: scale(1.02);
  box-shadow: 0 0 32px rgba(199,255,58,0.3);
}
.btn-primary:active {
  transform: scale(0.98);
}
.btn-outline {
  background: transparent;
  border-color: rgba(255,255,255,0.25);
  color: var(--text);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: scale(1.02);
}
.btn-outline:active {
  transform: scale(0.98);
}
.btn-sm {
  padding: 8px 16px;
  font-size: 0.8rem;
}
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  padding: 8px;
}
.nav-hamburger span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s, background 0.3s;
}
.nav-hamburger:hover span {
  background: var(--primary);
}
.nav-hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-hamburger.open span:nth-child(2) {
  opacity: 0;
}
.nav-hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== Breadcrumb ===== */
.breadcrumb-wrap {
  padding: 24px 0 4px;
}
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0;
  font-size: 0.85rem;
  color: var(--text-2);
}
.breadcrumb a {
  color: var(--text-2);
  display: inline-flex;
  align-items: center;
}
.breadcrumb a:hover {
  color: var(--primary);
}
.breadcrumb .sep {
  margin: 0 8px;
  color: var(--text-3);
  font-size: 0.7rem;
}
.breadcrumb .current {
  color: var(--text);
  max-width: 420px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ===== Article Layout ===== */
.article-section {
  padding: 16px 0 clamp(48px, 6vw, 72px);
}
.article-main {
  max-width: 860px;
  margin: 0 auto;
}
.article-header {
  padding: 12px 0 24px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 28px;
}
.article-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  background: rgba(199,255,58,0.08);
  border: 1px solid rgba(199,255,58,0.2);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
}
.article-header h1 {
  font-size: clamp(1.75rem, 3.4vw, 2.65rem);
  line-height: 1.25;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--text);
  margin: 16px 0 18px;
}
.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 0.82rem;
  color: var(--text-2);
}
.article-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.article-meta-item i {
  color: var(--text-3);
  font-size: 0.75rem;
}
.article-meta .divider {
  width: 1px;
  height: 14px;
  background: var(--border);
}

/* ===== Article Cover ===== */
.article-cover {
  max-width: 860px;
  margin: 0 auto 28px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 16 / 8;
  border: 1px solid var(--border);
  background: var(--bg-panel);
}
.article-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ===== Article Body ===== */
.article-body {
  max-width: 760px;
  margin: 0 auto;
}
.article-content {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--text);
  word-break: break-word;
}
.article-content > * + * {
  margin-top: 1.4em;
}
.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.4;
  margin-top: 2.2em;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}
.article-content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-top: 1.8em;
  color: var(--text);
}
.article-content p {
  color: rgba(234,240,244,0.88);
}
.article-content a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-content a:hover {
  color: var(--primary);
}
.article-content strong {
  color: var(--text);
  font-weight: 600;
}
.article-content ul,
.article-content ol {
  padding-left: 1.3em;
  color: rgba(234,240,244,0.88);
}
.article-content ul {
  list-style: disc;
}
.article-content ol {
  list-style: decimal;
}
.article-content li {
  margin-bottom: 0.6em;
  padding-left: 4px;
}
.article-content blockquote {
  border-left: 3px solid var(--primary);
  background: rgba(199,255,58,0.05);
  padding: 14px 20px;
  border-radius: 0 12px 12px 0;
  color: var(--text-2);
  font-style: normal;
}
.article-content blockquote p {
  color: inherit;
  margin: 0;
}
.article-content img {
  border-radius: 12px;
  border: 1px solid var(--border);
  margin: 24px 0;
}
.article-content pre {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  font-family: "Roboto Mono", "JetBrains Mono", monospace;
  font-size: 0.875rem;
  overflow-x: auto;
  color: var(--accent);
  line-height: 1.7;
}
.article-content code {
  font-family: "Roboto Mono", "JetBrains Mono", monospace;
  font-size: 0.875em;
  background: rgba(255,255,255,0.06);
  padding: 2px 6px;
  border-radius: 5px;
  color: var(--accent);
}
.article-content pre code {
  background: transparent;
  padding: 0;
  color: inherit;
}

/* ===== Empty State ===== */
.article-empty {
  text-align: center;
  padding: 80px 20px;
}
.empty-icon {
  font-size: 3.5rem;
  color: var(--text-3);
  margin-bottom: 18px;
  opacity: 0.7;
}
.article-empty h2 {
  font-size: 1.4rem;
  margin-bottom: 10px;
}
.article-empty p {
  color: var(--text-2);
  margin-bottom: 28px;
}

/* ===== Related Section ===== */
.related-section {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 56px;
  border-top: 1px solid var(--border);
}
.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 26px;
}
.section-head h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text);
}
.section-link {
  font-size: 0.85rem;
  color: var(--text-2);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.25s, gap 0.25s;
}
.section-link:hover {
  color: var(--primary);
  gap: 10px;
}
.related-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.related-card {
  display: flex;
  align-items: center;
  gap: 18px;
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  padding: 16px;
  transition: transform 0.3s var(--ease), border-color 0.3s, box-shadow 0.3s var(--ease);
  position: relative;
  overflow: hidden;
}
.related-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--primary);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform 0.35s var(--ease);
}
.related-card:hover {
  border-color: rgba(199,255,58,0.5);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}
.related-card:hover::before {
  transform: scaleY(1);
}
.related-thumb {
  width: 128px;
  height: 84px;
  border-radius: 10px;
  overflow: hidden;
  flex-shrink: 0;
  border: 1px solid var(--border);
}
.related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease);
}
.related-card:hover .related-thumb img {
  transform: scale(1.05);
}
.related-body {
  min-width: 0;
  flex: 1;
}
.related-body .tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--primary);
  background: rgba(199,255,58,0.08);
  border: 1px solid rgba(199,255,58,0.18);
  border-radius: var(--radius-pill);
  padding: 2px 10px;
  margin-bottom: 8px;
}
.related-body h3 {
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-body h3 a:hover {
  color: var(--primary);
}
.related-body p {
  font-size: 0.82rem;
  color: var(--text-2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-arrow {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--border);
  color: var(--text-2);
  transition: all 0.3s var(--ease);
}
.related-arrow:hover {
  background: var(--primary);
  color: var(--bg);
  border-color: var(--primary);
}

/* ===== Download CTA ===== */
.article-download {
  max-width: 1200px;
  margin: 56px auto 0;
  background:
    radial-gradient(ellipse at 80% 20%, rgba(199,255,58,0.08), transparent 50%),
    linear-gradient(135deg, var(--bg-panel) 0%, var(--bg-card) 100%);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 22px;
  padding: clamp(36px, 6vw, 56px) clamp(24px, 5vw, 48px);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.article-download::after {
  content: "";
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.webp') center top / cover no-repeat;
  opacity: 0.06;
  pointer-events: none;
}
.article-download-inner {
  position: relative;
  z-index: 1;
}
.article-download h2 {
  font-size: clamp(1.3rem, 2.4vw, 1.8rem);
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.article-download p {
  color: var(--text-2);
  max-width: 520px;
  margin: 0 auto 24px;
  font-size: 0.92rem;
}
.article-download .btn-group {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
}
.version-mono {
  display: block;
  margin-top: 20px;
  font-family: "Roboto Mono", "JetBrains Mono", monospace;
  font-size: 0.75rem;
  color: var(--text-3);
  letter-spacing: 0.04em;
}

/* ===== Back Link ===== */
.back-links {
  max-width: 1200px;
  margin: 36px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-2);
  font-size: 0.88rem;
  transition: color 0.25s, gap 0.25s;
}
.back-link:hover {
  color: var(--primary);
  gap: 12px;
}
.back-link i {
  font-size: 0.8rem;
}
.back-links-meta {
  font-size: 0.78rem;
  color: var(--text-3);
  font-family: "Roboto Mono", "JetBrains Mono", monospace;
}

/* ===== Footer ===== */
.footer {
  background: #07090B;
  border-top: 1px solid var(--border);
  margin-top: clamp(72px, 10vw, 110px);
  padding-top: 56px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 0.8fr 0.9fr 1.1fr;
  gap: 36px;
  padding-bottom: 40px;
}
.footer-brand .nav-logo {
  margin-bottom: 14px;
}
.footer-brand p {
  font-size: 0.84rem;
  color: var(--text-2);
  margin-bottom: 18px;
  max-width: 300px;
}
.footer-column h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}
.footer-column ul li {
  margin-bottom: 10px;
}
.footer-column ul a {
  font-size: 0.82rem;
  color: var(--text-2);
}
.footer-column ul a:hover {
  color: var(--primary);
}
.footer-contact p {
  font-size: 0.82rem;
  color: var(--text-2);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-contact i {
  color: var(--text-3);
  width: 16px;
  text-align: center;
}
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 18px 0;
}
.footer-bottom .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.copyright {
  font-size: 0.78rem;
  color: var(--text-3);
}
.copyright a {
  color: var(--text-3);
}
.copyright a:hover {
  color: var(--primary);
}
.footer-links {
  display: flex;
  gap: 20px;
}
.footer-links a {
  font-size: 0.75rem;
  color: var(--text-3);
}
.footer-links a:hover {
  color: var(--primary);
}

/* ===== Reveal Animation ===== */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .related-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 767px) {
  body {
    font-size: 0.9rem;
  }
  .topbar-right .topbar-link:first-child {
    display: none;
  }
  .navbar {
    height: 60px;
  }
  .nav-menu {
    position: fixed;
    inset: 96px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    background: rgba(10,12,14,0.98);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border);
    padding: 16px;
    gap: 4px;
    transform: translateY(-120%);
    transition: transform 0.4s var(--ease);
    z-index: 999;
  }
  .nav-menu.open {
    transform: translateY(0);
  }
  .nav-item {
    width: 100%;
  }
  .nav-item.active .nav-link::after {
    display: none;
  }
  .nav-item.active .nav-link {
    background: rgba(199,255,58,0.08);
  }
  .nav-link {
    display: block;
    padding: 12px 14px;
  }
  .nav-cta .btn {
    display: none;
  }
  .nav-hamburger {
    display: flex;
  }
  .breadcrumb .current {
    max-width: 200px;
  }
  .article-header h1 {
    font-size: 1.65rem;
  }
  .article-meta {
    gap: 10px;
  }
  .article-meta .divider {
    display: none;
  }
  .article-cover {
    aspect-ratio: 16 / 9;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .related-card {
    padding: 14px;
  }
  .related-thumb {
    width: 92px;
    height: 68px;
  }
  .article-download .btn-group {
    flex-direction: column;
    align-items: stretch;
  }
  .article-download .btn-group .btn {
    width: 100%;
  }
  .back-links {
    flex-direction: column;
    align-items: flex-start;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-brand p {
    max-width: 100%;
  }
}
@media (max-width: 520px) {
  .logo-sub {
    display: none;
  }
  .topbar-domain {
    font-size: 0.7rem;
  }
  .breadcrumb-wrap {
    padding-top: 18px;
  }
  .article-section {
    padding-top: 8px;
  }
  .article-header h1 {
    font-size: 1.45rem;
  }
  .article-content {
    font-size: 0.95rem;
  }
}

/* roulang page: category1 */
:root {
  --bg: #0A0C0E;
  --panel: #14171D;
  --card: #1C2128;
  --primary: #C7FF3A;
  --primary-hover: #D9FF70;
  --accent: #8CE8B0;
  --text: #EAF0F4;
  --text-secondary: #9AA4AE;
  --text-muted: #5E6872;
  --border: #252B33;
  --success: #47D47E;
  --warning: #FFB85C;
  --danger: #FF6B6B;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-pill: 999px;
  --shadow-card: 0 18px 40px rgba(0,0,0,0.35);
  --shadow-btn: 0 0 24px rgba(199,255,58,0.2);
  --transition: all .3s cubic-bezier(.22, 1, .36, 1);
  --container: 1200px;
  --space-section: clamp(72px, 10vw, 128px);
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 0.95rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
}
img {
  max-width: 100%;
  display: block;
}
button {
  font-family: inherit;
  border: none;
  cursor: pointer;
  background: none;
}
input, select, textarea {
  font-family: inherit;
}
ul, ol {
  list-style: none;
}
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: clamp(16px, 4vw, 40px);
  padding-right: clamp(16px, 4vw, 40px);
}
::selection {
  background: rgba(199,255,58,0.2);
  color: var(--text);
}
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 4px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #0A0C0E;
  box-shadow: var(--shadow-btn);
}
.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 0 36px rgba(199,255,58,0.35);
  transform: scale(1.02);
}
.btn-primary:active {
  transform: scale(0.98);
}
.btn-outline {
  border-color: rgba(255,255,255,0.18);
  color: var(--text);
  background: rgba(255,255,255,0.02);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(199,255,58,0.06);
  transform: scale(1.02);
}
.btn-outline:active {
  transform: scale(0.98);
}
.btn-sm {
  padding: 8px 18px;
  font-size: 0.875rem;
  border-radius: 8px;
}
.btn-lg {
  padding: 16px 40px;
  font-size: 1.05rem;
  border-radius: 12px;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(199,255,58,0.1);
  color: var(--primary);
  border: 1px solid rgba(199,255,58,0.2);
  border-radius: var(--radius-pill);
  padding: 3px 12px;
  font-size: 0.7rem;
  font-weight: 500;
  white-space: nowrap;
}
/* ===== Topbar ===== */
.topbar {
  background: #080A0C;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  height: 36px;
  display: flex;
  align-items: center;
  font-size: 0.75rem;
  color: var(--text-muted);
}
.topbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}
.topbar-left {
  display: flex;
  align-items: center;
  gap: 12px;
}
.topbar-domain {
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}
.topbar-right {
  display: flex;
  gap: 18px;
}
.topbar-right a {
  color: var(--text-muted);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color .3s;
  line-height: 28px;
}
.topbar-right a:hover {
  color: var(--primary);
}
.topbar-right a i {
  font-size: 0.7rem;
}
/* ===== Navbar ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 64px;
  background: rgba(10,12,14,0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: box-shadow .4s;
}
.navbar.scrolled {
  box-shadow: 0 10px 36px rgba(0,0,0,0.45);
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  width: 100%;
}
.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-mark {
  width: 34px;
  height: 34px;
  background: var(--primary);
  color: #0A0C0E;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.15rem;
  box-shadow: 0 0 18px rgba(199,255,58,0.25);
}
.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.logo-main {
  font-weight: 900;
  font-size: 1.15rem;
  color: var(--text);
  letter-spacing: 0.01em;
}
.logo-sub {
  font-size: 0.62rem;
  color: var(--text-secondary);
  letter-spacing: 0.08em;
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-item {
  position: relative;
}
.nav-link {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 8px 0;
  display: block;
  transition: color .3s;
  letter-spacing: 0.02em;
}
.nav-link:hover {
  color: var(--text);
}
.nav-item.active .nav-link {
  color: var(--primary);
}
.nav-item.active::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}
.nav-cta {
  display: flex;
  align-items: center;
  gap: 14px;
}
.nav-hamburger {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 38px;
  height: 38px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  z-index: 101;
  transition: border-color .3s;
}
.nav-hamburger:hover {
  border-color: var(--primary);
}
.nav-hamburger span {
  display: block;
  width: 16px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all .35s cubic-bezier(.22,1,.36,1);
}
.nav-hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-hamburger.active span:nth-child(2) {
  opacity: 0;
}
.nav-hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
/* ===== Page Hero ===== */
.page-hero {
  position: relative;
  min-height: 240px;
  display: flex;
  align-items: center;
  background: linear-gradient(120deg, rgba(10,12,14,0.94) 0%, rgba(20,23,29,0.82) 60%, rgba(28,33,40,0.6) 100%), url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.4;
  pointer-events: none;
}
.page-hero-inner {
  position: relative;
  z-index: 2;
  padding-top: 40px;
  padding-bottom: 40px;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}
.breadcrumb a {
  color: var(--text-secondary);
  transition: color .3s;
}
.breadcrumb a:hover {
  color: var(--primary);
}
.breadcrumb i {
  font-size: 0.6rem;
  color: var(--text-muted);
}
.page-hero h1 {
  font-size: clamp(1.8rem, 3.2vw, 2.6rem);
  font-weight: 900;
  color: var(--text);
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-bottom: 12px;
}
.page-hero h1 .highlight {
  color: var(--primary);
}
.page-hero .hero-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  max-width: 640px;
  line-height: 1.7;
}
/* ===== Category Layout ===== */
.category-layout {
  padding: var(--space-section) 0;
  position: relative;
  background: linear-gradient(180deg, var(--bg) 0%, #0D1014 100%);
}
.category-layout::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 38%;
  height: 100%;
  background: radial-gradient(ellipse at top right, rgba(199,255,58,0.035), transparent 70%);
  pointer-events: none;
}
.cat-grid {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 44px;
  align-items: start;
  position: relative;
  z-index: 2;
}
.cat-anchor-nav {
  position: sticky;
  top: 88px;
  background: var(--panel);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg);
  padding: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
}
.cat-anchor-nav h3 {
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 10px 14px 8px;
  font-weight: 600;
}
.cat-anchor-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  border-radius: 10px;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  border-left: 2px solid transparent;
  transition: all .3s;
  margin-bottom: 2px;
}
.cat-anchor-nav a i {
  width: 18px;
  text-align: center;
  color: var(--text-muted);
  transition: color .3s;
}
.cat-anchor-nav a:hover {
  background: rgba(255,255,255,0.04);
  color: var(--text);
}
.cat-anchor-nav a.active {
  background: rgba(199,255,58,0.07);
  color: var(--primary);
  border-left-color: var(--primary);
}
.cat-anchor-nav a.active i {
  color: var(--primary);
}
/* ===== Content Blocks ===== */
.content-block {
  margin-bottom: 56px;
}
.content-block:last-child {
  margin-bottom: 0;
}
.content-block-header {
  margin-bottom: 24px;
}
.content-block-header h2 {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: clamp(1.25rem, 2vw, 1.55rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.content-block-header h2::before {
  content: "";
  width: 4px;
  height: 20px;
  background: var(--primary);
  border-radius: 2px;
  flex-shrink: 0;
}
.content-block-header p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  max-width: 720px;
  line-height: 1.65;
}
.block-note {
  display: inline-block;
  font-size: 0.72rem;
  color: var(--text-muted);
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 3px 12px;
  margin-top: 6px;
}
/* Horizontal Cards */
.horizontal-card {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--card);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin-bottom: 14px;
  transition: all .35s cubic-bezier(.22,1,.36,1);
}
.horizontal-card:last-child {
  margin-bottom: 0;
}
.horizontal-card:hover {
  border-color: rgba(199,255,58,0.45);
  background: #1F252D;
  box-shadow: var(--shadow-card);
  transform: translateX(4px);
}
.horizontal-card .card-icon {
  flex-shrink: 0;
  width: 50px;
  height: 50px;
  border-radius: 14px;
  background: rgba(199,255,58,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--primary);
  border: 1px solid rgba(199,255,58,0.15);
}
.horizontal-card .card-body {
  flex: 1;
  min-width: 0;
}
.horizontal-card h3 {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}
.horizontal-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.horizontal-card .card-more {
  flex-shrink: 0;
  color: var(--text-muted);
  font-size: 0.85rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color .3s;
}
.horizontal-card:hover .card-more {
  color: var(--primary);
}
.horizontal-card .card-more i {
  transition: transform .3s;
}
.horizontal-card:hover .card-more i {
  transform: translateX(4px);
}
/* Update List */
.update-list {
  background: var(--card);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.update-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  transition: background .3s;
}
.update-item:last-child {
  border-bottom: none;
}
.update-item:hover {
  background: rgba(255,255,255,0.03);
}
.update-version {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary);
  background: rgba(199,255,58,0.08);
  border: 1px solid rgba(199,255,58,0.15);
  border-radius: var(--radius-pill);
  padding: 4px 14px;
  flex-shrink: 0;
  white-space: nowrap;
}
.update-date {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  color: var(--text-muted);
  flex-shrink: 0;
  min-width: 88px;
}
.update-info {
  flex: 1;
  min-width: 0;
}
.update-info .update-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 2px;
}
.update-info .update-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.55;
}
.update-platform {
  font-size: 0.7rem;
  color: var(--accent);
  border: 1px solid rgba(140,232,176,0.25);
  border-radius: var(--radius-pill);
  padding: 2px 12px;
  flex-shrink: 0;
  white-space: nowrap;
}
/* Hot Grid */
.hot-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.hot-card {
  background: var(--card);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all .4s cubic-bezier(.22,1,.36,1);
}
.hot-card:hover {
  border-color: rgba(199,255,58,0.4);
  box-shadow: var(--shadow-card);
  transform: translateY(-5px);
}
.hot-card .hot-cover {
  position: relative;
  height: 176px;
  overflow: hidden;
  background: #1A1E24;
}
.hot-card .hot-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s cubic-bezier(.22,1,.36,1);
}
.hot-card:hover .hot-cover img {
  transform: scale(1.05);
}
.hot-card .hot-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(10,12,14,0.85);
  color: var(--primary);
  font-size: 0.68rem;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(199,255,58,0.3);
  backdrop-filter: blur(6px);
}
.hot-card .hot-body {
  padding: 20px 22px;
}
.hot-card h3 {
  font-size: 1.02rem;
  font-weight: 600;
  margin-bottom: 6px;
}
.hot-card p {
  font-size: 0.83rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
}
.hot-card .hot-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
}
.hot-card .hot-meta i {
  color: var(--primary);
  margin-right: 4px;
}
/* Guide Steps */
.guide-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.guide-card {
  background: var(--panel);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg);
  padding: 26px 22px;
  position: relative;
  transition: all .35s cubic-bezier(.22,1,.36,1);
  overflow: hidden;
}
.guide-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 48px;
  height: 48px;
  background: radial-gradient(circle at top right, rgba(199,255,58,0.08), transparent 70%);
  pointer-events: none;
}
.guide-card:hover {
  border-color: rgba(199,255,58,0.3);
  transform: translateY(-4px);
  box-shadow: 0 14px 30px rgba(0,0,0,0.3);
}
.guide-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 2rem;
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1px rgba(199,255,58,0.45);
  line-height: 1;
}
.guide-card h3 {
  font-size: 0.92rem;
  font-weight: 600;
  margin: 14px 0 8px;
  color: var(--text);
}
.guide-card p {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.6;
}
/* News Cards */
.news-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.news-card {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--card);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg);
  padding: 18px 24px;
  transition: all .35s;
}
.news-card:hover {
  border-color: rgba(199,255,58,0.4);
  box-shadow: var(--shadow-card);
  transform: translateX(4px);
}
.news-card .news-tag {
  flex-shrink: 0;
  background: rgba(140,232,176,0.1);
  color: var(--accent);
  border: 1px solid rgba(140,232,176,0.2);
  border-radius: var(--radius-pill);
  padding: 4px 14px;
  font-size: 0.7rem;
  font-weight: 600;
  white-space: nowrap;
}
.news-card .news-body {
  flex: 1;
  min-width: 0;
}
.news-card .news-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.news-card .news-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-card .news-date {
  flex-shrink: 0;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--text-muted);
}
/* ===== FAQ ===== */
.faq-section {
  padding: var(--space-section) 0;
  background: var(--panel);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px;
}
.section-head .section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(199,255,58,0.08);
  border: 1px solid rgba(199,255,58,0.18);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 6px 18px;
  border-radius: var(--radius-pill);
  margin-bottom: 16px;
}
.section-head h2 {
  font-size: clamp(1.5rem, 2.8vw, 2.1rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.3;
  margin-bottom: 12px;
}
.section-head p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
}
.faq-list {
  max-width: 840px;
  margin: 0 auto;
}
.faq-item {
  background: var(--card);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color .3s;
}
.faq-item.open {
  border-color: rgba(199,255,58,0.35);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 26px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  user-select: none;
}
.faq-question::after {
  content: "+";
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--text-muted);
  transition: transform .35s cubic-bezier(.22,1,.36,1), color .3s;
  flex-shrink: 0;
  line-height: 1;
}
.faq-item.open .faq-question::after {
  transform: rotate(45deg);
  color: var(--primary);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s ease, padding .4s ease;
  padding: 0 26px;
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.85;
}
.faq-item.open .faq-answer {
  max-height: 400px;
  padding: 0 26px 22px;
}
.faq-answer a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.faq-answer a:hover {
  color: var(--primary-hover);
}
/* ===== CTA ===== */
.cta-section {
  padding: var(--space-section) 0;
  text-align: center;
  background: linear-gradient(180deg, var(--bg) 0%, rgba(20,23,29,0.7) 100%), url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(199,255,58,0.05), transparent 65%);
  pointer-events: none;
}
.cta-inner {
  position: relative;
  z-index: 2;
}
.cta-section h2 {
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.cta-section .cta-desc {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 640px;
  margin: 0 auto 40px;
  line-height: 1.7;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.version-note {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}
.version-note span {
  color: var(--text-secondary);
}
/* ===== Footer ===== */
.footer {
  background: #080A0C;
  border-top: 1px solid var(--border);
  padding-top: 64px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.3fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-brand .nav-logo {
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 16px 0 20px;
  max-width: 320px;
}
.footer-column h4 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 18px;
  color: var(--text);
  letter-spacing: 0.02em;
}
.footer-column ul li {
  margin-bottom: 10px;
}
.footer-column ul li a {
  color: var(--text-secondary);
  font-size: 0.84rem;
  transition: color .3s;
}
.footer-column ul li a:hover {
  color: var(--primary);
}
.footer-contact p {
  color: var(--text-secondary);
  font-size: 0.84rem;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-contact i {
  width: 16px;
  color: var(--primary);
  text-align: center;
  font-size: 0.8rem;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 20px 0;
}
.footer-bottom .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  width: 100%;
}
.copyright {
  font-size: 0.78rem;
  color: var(--text-muted);
}
.copyright a {
  color: var(--text-secondary);
  transition: color .3s;
}
.copyright a:hover {
  color: var(--primary);
}
.footer-links {
  display: flex;
  gap: 20px;
}
.footer-links a {
  color: var(--text-muted);
  font-size: 0.78rem;
  transition: color .3s;
}
.footer-links a:hover {
  color: var(--primary);
}
/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .cat-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .cat-anchor-nav {
    position: relative;
    top: auto;
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    padding: 10px;
  }
  .cat-anchor-nav h3 {
    display: none;
  }
  .cat-anchor-nav a {
    padding: 8px 14px;
    border-left: none;
    border-radius: var(--radius-pill);
    background: rgba(255,255,255,0.03);
    font-size: 0.8rem;
    margin-bottom: 0;
  }
  .cat-anchor-nav a.active {
    background: rgba(199,255,58,0.1);
  }
  .cat-anchor-nav a i {
    display: none;
  }
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: min(420px, 85vw);
    height: 100vh;
    background: var(--panel);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 0;
    padding: 100px 36px 40px;
    transition: right .45s cubic-bezier(.22,1,.36,1);
    z-index: 99;
    border-left: 1px solid var(--border);
    box-shadow: -20px 0 60px rgba(0,0,0,0.55);
    overflow-y: auto;
  }
  .nav-menu.open {
    right: 0;
  }
  .nav-item {
    width: 100%;
  }
  .nav-item.active::after {
    display: none;
  }
  .nav-link {
    display: block;
    padding: 16px 0;
    font-size: 1rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
    width: 100%;
  }
  .nav-item.active .nav-link {
    color: var(--primary);
  }
  .nav-cta .btn-primary {
    display: none;
  }
  .nav-hamburger {
    display: flex;
  }
  .guide-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 768px) {
  .topbar {
    height: auto;
    padding: 6px 0;
  }
  .topbar-right a:first-child {
    display: none;
  }
  .page-hero {
    min-height: 220px;
  }
  .page-hero-inner {
    padding-top: 32px;
    padding-bottom: 32px;
  }
  .hot-grid {
    grid-template-columns: 1fr;
  }
  .horizontal-card {
    flex-wrap: wrap;
    gap: 14px;
    padding: 18px;
  }
  .horizontal-card .card-more {
    width: 100%;
    justify-content: flex-end;
  }
  .update-item {
    flex-wrap: wrap;
    gap: 10px;
  }
  .update-version {
    order: 1;
  }
  .update-date {
    order: 2;
    margin-left: auto;
  }
  .update-platform {
    order: 3;
  }
  .update-info {
    order: 4;
    flex-basis: 100%;
  }
  .news-card {
    flex-wrap: wrap;
    gap: 10px;
  }
  .news-card .news-date {
    margin-left: auto;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .footer-brand {
    grid-column: 1 / -1;
  }
  .cta-actions .btn {
    width: 100%;
    max-width: 360px;
  }
}
@media (max-width: 520px) {
  .guide-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-brand {
    grid-column: auto;
  }
  .page-hero h1 {
    font-size: 1.6rem;
  }
  .content-block-header h2 {
    font-size: 1.15rem;
  }
  .update-item {
    padding: 16px 18px;
  }
  .btn-lg {
    padding: 14px 28px;
    font-size: 0.95rem;
  }
}
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* roulang page: category2 */
:root {
  --bg-primary:#0A0C0E;
  --bg-panel:#14171D;
  --bg-card:#1C2128;
  --accent:#C7FF3A;
  --accent-hover:#D9FF70;
  --accent-rgb:199,255,58;
  --secondary:#8CE8B0;
  --text-primary:#EAF0F4;
  --text-secondary:#9AA4AE;
  --text-muted:#5E6872;
  --border:#252B33;
  --border-light:rgba(255,255,255,0.08);
  --success:#47D47E;
  --warning:#FFB85C;
  --error:#FF6B6B;
  --radius-lg:16px;
  --radius-md:10px;
  --radius-pill:999px;
  --shadow-card:0 18px 40px rgba(0,0,0,0.35);
  --shadow-accent:0 0 24px rgba(199,255,58,0.2);
  --container:1200px;
  --space-section:clamp(72px,10vw,128px);
  --font-sans:'PingFang SC','Noto Sans SC','Microsoft YaHei',-apple-system,'Helvetica Neue',Arial,sans-serif;
  --font-mono:'JetBrains Mono','Roboto Mono',Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font-sans);background:var(--bg-primary);color:var(--text-primary);font-size:15px;line-height:1.75;min-height:100vh;overflow-x:hidden}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font-family:inherit;font-size:inherit}
ul,ol{list-style:none}
.container{max-width:var(--container);margin:0 auto;padding-left:clamp(16px,4vw,40px);padding-right:clamp(16px,4vw,40px)}
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
/* topbar */
.topbar{background:#06080A;border-bottom:1px solid var(--border);height:36px;display:flex;align-items:center;font-size:0.75rem;color:var(--text-secondary)}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:100%}
.topbar-left{display:flex;align-items:center;gap:10px;min-width:0}
.topbar-domain{font-family:var(--font-mono);letter-spacing:0.02em;white-space:nowrap}
.badge-official{display:inline-flex;align-items:center;background:rgba(199,255,58,0.12);color:var(--accent);border:1px solid rgba(199,255,58,0.3);padding:1px 8px;border-radius:var(--radius-pill);font-size:0.68rem;font-weight:600;letter-spacing:0.04em;white-space:nowrap}
.topbar-links{display:flex;gap:18px;align-items:center}
.topbar-links a{color:var(--text-secondary);transition:color 0.2s;white-space:nowrap}
.topbar-links a:hover{color:var(--accent)}
/* navbar */
.navbar{position:sticky;top:0;z-index:1000;background:rgba(10,12,14,0.85);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);height:64px;transition:box-shadow 0.3s}
.navbar.scrolled{box-shadow:0 8px 30px rgba(0,0,0,0.35)}
.navbar .container{display:flex;align-items:center;justify-content:space-between;height:64px}
.nav-logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{width:36px;height:36px;background:var(--accent);color:#0A0C0E;border-radius:10px;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:1.15rem;line-height:1;flex-shrink:0}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-main{font-weight:900;font-size:1.05rem;color:var(--text-primary);letter-spacing:-0.01em}
.logo-sub{font-size:0.65rem;color:var(--text-muted);letter-spacing:0.08em;margin-top:1px}
.nav-menu{display:flex;align-items:center;gap:2px}
.nav-item{position:relative}
.nav-link{display:block;padding:8px 14px;color:var(--text-secondary);font-size:0.9rem;border-radius:8px;transition:color 0.2s,background 0.2s}
.nav-link:hover{color:var(--text-primary);background:rgba(255,255,255,0.04)}
.nav-item.active .nav-link{color:var(--accent)}
.nav-item.active::after{content:'';position:absolute;left:14px;right:14px;bottom:-2px;height:2px;background:var(--accent);border-radius:2px}
.nav-cta{display:flex;align-items:center;gap:12px}
.nav-hamburger{display:none;flex-direction:column;justify-content:center;gap:5px;width:42px;height:42px;background:transparent;border:1px solid var(--border);border-radius:10px;cursor:pointer;padding:0 10px;transition:border-color 0.2s}
.nav-hamburger span{display:block;height:2px;background:var(--text-primary);border-radius:2px;transition:all 0.3s}
.nav-hamburger:hover{border-color:var(--accent)}
.nav-hamburger.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-hamburger.active span:nth-child(2){opacity:0}
.nav-hamburger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
/* buttons */
.btn{display:inline-flex;align-items:center;gap:8px;font-size:0.9rem;font-weight:600;padding:10px 22px;border-radius:var(--radius-md);border:none;cursor:pointer;transition:all 0.25s ease;text-decoration:none;line-height:1.4}
.btn i{font-size:0.95em}
.btn-primary{background:var(--accent);color:#0A0C0E}
.btn-primary:hover{background:var(--accent-hover);box-shadow:var(--shadow-accent);transform:scale(1.02)}
.btn-primary:active{transform:scale(0.98)}
.btn-outline{background:transparent;border:1px solid rgba(255,255,255,0.2);color:var(--text-primary)}
.btn-outline:hover{border-color:var(--accent);color:var(--accent);background:rgba(199,255,58,0.04)}
.btn-outline:active{transform:scale(0.98)}
.btn-sm{padding:8px 16px;font-size:0.85rem;border-radius:8px}
/* breadcrumb */
.breadcrumb{padding:18px 0 0;background:var(--bg-primary)}
.breadcrumb .container{display:flex;align-items:center;gap:8px;font-size:0.82rem;color:var(--text-muted)}
.breadcrumb a{color:var(--text-secondary);transition:color 0.2s}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb i{font-size:0.7rem;color:var(--text-muted)}
.breadcrumb .current{color:var(--text-secondary)}
/* page hero */
.page-hero{position:relative;padding:64px 0 56px;background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;border-bottom:1px solid var(--border)}
.page-hero::before{content:'';position:absolute;inset:0;background:linear-gradient(to bottom,rgba(10,12,14,0.78),rgba(10,12,14,0.92))}
.page-hero::after{content:'';position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,0.04) 1px,transparent 1px);background-size:24px 24px;opacity:0.4}
.page-hero .container{position:relative;z-index:2}
.page-hero h1{font-size:clamp(2rem,4vw,2.8rem);font-weight:900;color:var(--text-primary);letter-spacing:-0.02em;line-height:1.2;margin-bottom:14px}
.page-hero h1 span{color:var(--accent)}
.page-hero p{font-size:1rem;color:var(--text-secondary);max-width:600px;line-height:1.8}
/* guide wrap */
.guide-wrap{padding:var(--space-section) 0;background:var(--bg-primary)}
.guide-layout{display:grid;grid-template-columns:250px 1fr;gap:48px;align-items:start}
.guide-sidebar{position:sticky;top:88px;display:flex;flex-direction:column;gap:4px;padding:20px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius-lg)}
.guide-sidebar h3{font-size:0.75rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:0.1em;margin-bottom:10px;padding:0 8px}
.guide-sidebar a{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:8px;color:var(--text-secondary);font-size:0.88rem;transition:all 0.2s;border-left:2px solid transparent}
.guide-sidebar a i{width:16px;text-align:center;font-size:0.8rem;color:var(--text-muted);transition:color 0.2s}
.guide-sidebar a:hover{color:var(--text-primary);background:rgba(255,255,255,0.04)}
.guide-sidebar a.active{color:var(--accent);background:rgba(199,255,58,0.06);border-left-color:var(--accent)}
.guide-sidebar a.active i{color:var(--accent)}
.guide-cards{display:flex;flex-direction:column;gap:20px}
.guide-card{display:grid;grid-template-columns:132px 1fr;gap:24px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;transition:all 0.3s ease}
.guide-card:hover{border-color:rgba(199,255,58,0.4);box-shadow:var(--shadow-card);transform:translateY(-2px)}
.card-thumb{width:132px;height:132px;border-radius:12px;overflow:hidden;background:var(--bg-card);border:1px solid var(--border-light)}
.card-thumb img{width:100%;height:100%;object-fit:cover}
.card-body{display:flex;flex-direction:column;justify-content:center;gap:6px}
.card-tag{align-self:flex-start;display:inline-flex;align-items:center;padding:2px 12px;background:rgba(199,255,58,0.08);border:1px solid rgba(199,255,58,0.2);color:var(--accent);border-radius:var(--radius-pill);font-size:0.75rem;font-weight:500}
.guide-card h3{font-size:1.1rem;color:var(--text-primary);font-weight:700;line-height:1.4}
.guide-card p{font-size:0.88rem;color:var(--text-secondary);line-height:1.7;margin:0}
.card-link{margin-top:6px;display:inline-flex;align-items:center;gap:8px;color:var(--secondary);font-size:0.85rem;font-weight:500;transition:color 0.2s}
.card-link i{transition:transform 0.2s}
.guide-card:hover .card-link i{transform:translateX(4px)}
.card-link:hover{color:var(--accent)}
/* process */
.process-section{padding:var(--space-section) 0;background:var(--bg-panel)}
.section-header{text-align:center;max-width:640px;margin:0 auto 48px}
.section-header h2{font-size:clamp(1.5rem,2.6vw,2.1rem);font-weight:700;letter-spacing:-0.01em;line-height:1.3;margin-bottom:12px}
.section-header p{font-size:0.92rem;color:var(--text-secondary);line-height:1.8}
.process-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.process-item{position:relative;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px 24px 28px;overflow:hidden;transition:all 0.3s ease}
.process-item::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:var(--accent);opacity:0;transition:opacity 0.3s}
.process-item:hover::before{opacity:0.6}
.process-item:hover{transform:translateY(-4px);border-color:rgba(199,255,58,0.25);box-shadow:var(--shadow-card)}
.process-step{font-family:var(--font-mono);font-size:2rem;font-weight:700;color:var(--accent);opacity:0.75;line-height:1}
.process-item h3{font-size:1rem;color:var(--text-primary);margin:16px 0 8px;font-weight:700}
.process-item p{font-size:0.84rem;color:var(--text-secondary);line-height:1.7}
/* faq */
.faq-section{padding:var(--space-section) 0;background:var(--bg-primary)}
.faq-list{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden;transition:border-color 0.25s}
.faq-item.active{border-color:rgba(199,255,58,0.4)}
.faq-question{display:flex;justify-content:space-between;align-items:center;padding:18px 24px;cursor:pointer;font-size:0.95rem;font-weight:500;color:var(--text-primary);background:none;border:none;width:100%;text-align:left;gap:16px;transition:background 0.2s}
.faq-question:hover{background:rgba(255,255,255,0.02)}
.faq-icon{width:26px;height:26px;border-radius:50%;background:rgba(255,255,255,0.06);display:flex;align-items:center;justify-content:center;color:var(--text-secondary);transition:transform 0.3s,background 0.3s,color 0.3s;font-size:0.8rem;flex-shrink:0}
.faq-item.active .faq-icon{transform:rotate(45deg);background:rgba(199,255,58,0.12);color:var(--accent)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height 0.35s ease,padding 0.35s ease;padding:0 24px;color:var(--text-secondary);font-size:0.9rem;line-height:1.85}
.faq-item.active .faq-answer{max-height:360px;padding-bottom:22px;padding-top:2px}
/* cta */
.cta-section{padding:80px 0;background:linear-gradient(135deg,rgba(20,23,29,0.92),rgba(10,12,14,0.88)),url('/assets/images/backpic/back-2.webp') center/cover;border-top:1px solid var(--border)}
.cta-inner{text-align:center;max-width:700px;margin:0 auto}
.cta-inner h2{font-size:clamp(1.6rem,3vw,2.2rem);color:var(--text-primary);margin-bottom:12px;font-weight:700}
.cta-inner p{color:var(--text-secondary);font-size:0.95rem;margin-bottom:28px;line-height:1.8}
.cta-btns{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}
.cta-btns .btn{padding:13px 30px;font-size:0.95rem}
.cta-note{margin-top:18px;font-size:0.78rem;color:var(--text-muted);font-family:var(--font-mono)}
/* footer */
.footer{background:#06080A;border-top:1px solid var(--border)}
.footer-grid{display:grid;grid-template-columns:1.4fr 0.8fr 0.8fr 1fr;gap:40px;padding:64px 0 48px}
.footer-brand .nav-logo{margin-bottom:16px}
.footer-brand p{font-size:0.85rem;color:var(--text-secondary);line-height:1.7;margin-bottom:20px;max-width:280px}
.footer-column h4{font-size:0.85rem;font-weight:700;color:var(--text-primary);margin-bottom:16px;letter-spacing:0.04em}
.footer-column ul{display:flex;flex-direction:column;gap:10px}
.footer-column ul a{font-size:0.85rem;color:var(--text-secondary);transition:color 0.2s}
.footer-column ul a:hover{color:var(--accent)}
.footer-contact{display:flex;flex-direction:column;gap:8px}
.footer-contact p{font-size:0.82rem;color:var(--text-secondary);display:flex;align-items:center;gap:8px}
.footer-contact p i{width:16px;color:var(--accent)}
.footer-bottom{border-top:1px solid var(--border);background:#06080A}
.footer-bottom .container{display:flex;justify-content:space-between;align-items:center;padding-top:20px;padding-bottom:20px;flex-wrap:wrap;gap:12px}
.copyright{font-size:0.78rem;color:var(--text-muted)}
.copyright a{color:var(--text-muted);transition:color 0.2s}
.copyright a:hover{color:var(--accent)}
.footer-links{display:flex;gap:20px}
.footer-links a{font-size:0.78rem;color:var(--text-muted);transition:color 0.2s}
.footer-links a:hover{color:var(--accent)}
/* section divider utility */
.section-divider{height:1px;background:linear-gradient(to right,transparent,var(--border),transparent)}
/* reveal animation */
.reveal{opacity:0;transform:translateY(14px);transition:opacity 0.6s cubic-bezier(0.22,1,0.36,1),transform 0.6s cubic-bezier(0.22,1,0.36,1)}
.reveal.visible{opacity:1;transform:translateY(0)}
/* responsive */
@media (max-width:1024px){
  .guide-layout{grid-template-columns:1fr;gap:32px}
  .guide-sidebar{position:static;flex-direction:row;flex-wrap:wrap;gap:4px;padding:14px}
  .guide-sidebar h3{width:100%}
  .guide-sidebar a{padding:8px 14px}
}
@media (max-width:768px){
  .topbar-links a span{display:none}
  .topbar-links a i{font-size:1rem}
  .nav-hamburger{display:flex}
  .nav-menu{position:fixed;top:100px;left:0;right:0;background:rgba(10,12,14,0.97);flex-direction:column;align-items:stretch;padding:16px 20px 24px;border-bottom:1px solid var(--border);display:none;z-index:999;box-shadow:0 24px 40px rgba(0,0,0,0.4)}
  .nav-menu.open{display:flex}
  .nav-item.active::after{display:none}
  .nav-link{padding:12px 16px;font-size:1rem}
  .process-grid{grid-template-columns:1fr 1fr}
  .guide-card{grid-template-columns:1fr;gap:16px}
  .card-thumb{width:100%;height:auto;aspect-ratio:16/8}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding-top:48px}
  .footer-brand{grid-column:1/-1}
  .footer-bottom .container{flex-direction:column;text-align:center}
  .cta-btns{flex-direction:column;align-items:center}
  .cta-btns .btn{width:100%;max-width:320px;justify-content:center}
}
@media (max-width:520px){
  .process-grid{grid-template-columns:1fr}
  .guide-cards{gap:14px}
  .page-hero h1{font-size:1.7rem}
  .footer-grid{grid-template-columns:1fr}
  .nav-menu{top:96px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:0.01ms !important;transition-duration:0.01ms !important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}