/* roulang page: index */
:root {
  --color-primary: #1668DC;
  --color-primary-dark: #1254B8;
  --color-primary-soft: #EDF3FC;
  --color-accent: #F5A623;
  --color-bg: #F4F7FB;
  --color-surface: #FFFFFF;
  --color-text: #1E2A3A;
  --color-text-secondary: #5A6B7E;
  --color-text-muted: #8A98A8;
  --color-border: #E5EBF2;
  --color-success: #17A672;
  --shadow-card: 0 4px 16px rgba(20, 40, 80, 0.06), 0 1px 4px rgba(20, 40, 80, 0.04);
  --shadow-card-hover: 0 12px 32px rgba(20, 40, 80, 0.10), 0 4px 8px rgba(20, 40, 80, 0.06);
  --shadow-nav: 0 1px 8px rgba(20, 40, 80, 0.06);
  --shadow-modal: 0 24px 64px rgba(20, 40, 80, 0.18);
  --radius-card: 16px;
  --radius-button: 10px;
  --radius-tag: 999px;
  --fs-display: 44px;
  --fs-h1: 36px;
  --fs-h2: 28px;
  --fs-h3: 20px;
  --fs-body: 16px;
  --fs-small: 14px;
  --fs-label: 12px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --space-7: 112px;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover {
  color: var(--color-primary-dark);
}
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 4px;
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}
ul, ol {
  list-style: none;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: var(--space-7) 0;
}
.section-head {
  text-align: center;
  margin-bottom: var(--space-5);
}
.section-head h2 {
  font-size: var(--fs-h2);
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
}
.section-head p {
  margin-top: var(--space-2);
  font-size: var(--fs-body);
  color: var(--color-text-secondary);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}
@media (max-width: 767px) {
  .section {
    padding: var(--space-6) 0;
  }
  .section-head h2 {
    font-size: 24px;
  }
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-button);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  border: 1px solid transparent;
  transition: all 0.25s ease;
  white-space: nowrap;
}
.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.btn-primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: #fff;
  box-shadow: 0 8px 24px rgba(22, 104, 220, 0.25);
  transform: translateY(-1px);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: none;
}
.btn-outline {
  background: transparent;
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.btn-outline:hover {
  background: var(--color-primary-soft);
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
}
.btn-outline-light {
  background: transparent;
  border-color: #fff;
  color: #fff;
}
.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}
.btn-lg {
  height: 54px;
  padding: 0 34px;
  font-size: 16px;
}
.btn-sm {
  height: 40px;
  padding: 0 20px;
  font-size: 14px;
}
.btn-download {
  height: 60px;
  padding: 0 24px;
  justify-content: flex-start;
  align-items: center;
  gap: 12px;
}
.btn-download .btn-dl-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  flex-shrink: 0;
}
.btn-download .btn-dl-main {
  display: block;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
}
.btn-download .btn-dl-sub {
  display: block;
  font-size: 12px;
  font-weight: 400;
  opacity: 0.8;
  line-height: 1.2;
  margin-top: 2px;
  font-variant-numeric: tabular-nums;
}
.btn-primary .btn-dl-icon {
  background: rgba(255, 255, 255, 0.15);
}
.btn-outline .btn-dl-icon {
  background: var(--color-primary-soft);
}
.badge,
.tag {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 12px;
  border-radius: var(--radius-tag);
  font-size: var(--fs-label);
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
}
.badge-blue {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}
.badge-accent {
  background: rgba(245, 166, 35, 0.14);
  color: #B67A0E;
}
.badge-green {
  background: rgba(23, 166, 114, 0.12);
  color: #128A5E;
}
.tag-outline {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  transition: all 0.2s ease;
}
.tag-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-soft);
}
.text-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  transition: color 0.2s;
}
.text-link:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-nav);
}
.top-bar {
  height: 36px;
  background: var(--color-primary-soft);
  border-bottom: 1px solid var(--color-border);
  font-size: 13px;
}
.top-bar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.top-bar-left {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}
.top-bar-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.online-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 22px;
  padding: 0 10px;
  border-radius: var(--radius-tag);
  background: rgba(23, 166, 114, 0.12);
  color: #128A5E;
  font-size: 12px;
  font-weight: 600;
}
.online-badge::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 0 0 rgba(23, 166, 114, 0.4);
  animation: pulse-dot 2s infinite;
  flex-shrink: 0;
}
@keyframes pulse-dot {
  0% { box-shadow: 0 0 0 0 rgba(23, 166, 114, 0.35); }
  70% { box-shadow: 0 0 0 6px rgba(23, 166, 114, 0); }
  100% { box-shadow: 0 0 0 0 rgba(23, 166, 114, 0); }
}
.version-label {
  color: var(--color-text-secondary);
  font-size: 13px;
  white-space: nowrap;
}
.countdown-label {
  color: var(--color-accent);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.top-bar-link {
  color: var(--color-text-secondary);
  font-size: 13px;
  transition: color 0.2s;
}
.top-bar-link:hover {
  color: var(--color-primary);
}
.top-bar-btn {
  display: inline-flex;
  align-items: center;
  height: 26px;
  padding: 0 14px;
  border-radius: 6px;
  background: var(--color-primary);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  border: none;
  transition: all 0.2s;
}
.top-bar-btn:hover {
  background: var(--color-primary-dark);
  color: #fff;
}
.main-nav {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
}
.logo-icon {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
}
.logo-text {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.02em;
  line-height: 1.2;
}
.logo-text small {
  display: block;
  font-size: 11px;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  margin: 0 auto;
}
.nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: 8px 2px;
  transition: color 0.2s;
  white-space: nowrap;
}
.nav-link:hover {
  color: var(--color-primary);
}
.nav-link.active {
  color: var(--color-primary);
  font-weight: 600;
}
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--color-primary);
}
.nav-cta {
  flex-shrink: 0;
}
.hamburger {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  transition: all 0.2s;
}
.hamburger:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
}
.hamburger svg {
  width: 20px;
  height: 20px;
  stroke: var(--color-text);
}
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background: #fff;
  flex-direction: column;
  padding: 24px;
}
.mobile-menu.open {
  display: flex;
}
.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}
.mobile-menu-close {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
}
.mobile-menu-links {
  margin-top: 48px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.mobile-menu-links a {
  display: block;
  padding: 16px 8px;
  font-size: 24px;
  font-weight: 600;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  transition: all 0.2s;
}
.mobile-menu-links a:hover,
.mobile-menu-links a.active {
  color: var(--color-primary);
}
.mobile-menu-cta {
  margin-top: auto;
  padding-bottom: 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.hero {
  position: relative;
  background: var(--color-primary-soft);
  overflow: hidden;
  padding-bottom: 80px;
}
.hero-decor {
  position: absolute;
  inset: 0;
  background-image: url("/assets/images/backpic/back-1.png");
  background-size: cover;
  background-position: center;
  opacity: 0.10;
  pointer-events: none;
}
.hero-decor-lines {
  position: absolute;
  top: 0;
  right: 0;
  width: 480px;
  height: 480px;
  pointer-events: none;
  opacity: 0.12;
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
  padding-top: 72px;
  padding-bottom: 32px;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 28px;
  padding: 0 14px;
  border-radius: var(--radius-tag);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 20px;
}
.hero-tag::before {
  content: "✓";
  font-weight: 700;
  color: var(--color-success);
}
.hero h1 {
  font-size: var(--fs-display);
  line-height: 1.25;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
  margin-bottom: 20px;
}
.hero h1 .highlight {
  color: var(--color-primary);
}
.hero-subtitle {
  font-size: 18px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
  max-width: 480px;
}
.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin-bottom: 32px;
}
.hero-trust li {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
}
.hero-trust li::before {
  content: "✓";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: rgba(23, 166, 114, 0.12);
  color: var(--color-success);
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-hint {
  margin-top: 16px;
  font-size: 14px;
  color: var(--color-text-muted);
}
.hero-visual {
  position: relative;
}
.hero-device {
  position: relative;
  border-radius: 18px;
  background: var(--color-surface);
  box-shadow: 0 20px 48px rgba(20, 40, 80, 0.14), 0 2px 8px rgba(20, 40, 80, 0.08);
  overflow: hidden;
  border: 1px solid var(--color-border);
}
.device-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 44px;
  padding: 0 16px;
  background: #F8FAFC;
  border-bottom: 1px solid var(--color-border);
}
.device-bar .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}
.device-bar .dot-r { background: #F46B5C; }
.device-bar .dot-y { background: #F5A623; }
.device-bar .dot-g { background: #17A672; }
.device-url {
  margin-left: 10px;
  flex: 1;
  height: 24px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  display: flex;
  align-items: center;
  padding: 0 10px;
  font-size: 12px;
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}
.device-bar .lock-icon {
  width: 14px;
  height: 14px;
  color: var(--color-text-muted);
  flex-shrink: 0;
}
.hero-device img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}
.hero-float-card {
  position: absolute;
  bottom: 20px;
  left: -20px;
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--color-surface);
  border-radius: 14px;
  padding: 12px 18px;
  box-shadow: var(--shadow-card-hover);
  border: 1px solid var(--color-border);
}
.hero-float-card .live-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 0 0 rgba(23, 166, 114, 0.4);
  animation: pulse-dot 2s infinite;
  flex-shrink: 0;
}
.hero-float-card strong {
  display: block;
  font-size: 16px;
  color: var(--color-text);
  line-height: 1.2;
}
.hero-float-card span {
  font-size: 12px;
  color: var(--color-text-muted);
  line-height: 1.2;
}
.hero-float-card-2 {
  position: absolute;
  top: 24px;
  right: -12px;
  border-radius: 14px;
  padding: 12px 16px;
  background: var(--color-surface);
  box-shadow: var(--shadow-card-hover);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 8px;
}
.hero-float-card-2 svg {
  width: 18px;
  height: 18px;
  color: var(--color-primary);
  flex-shrink: 0;
}
.hero-float-card-2 strong {
  font-size: 13px;
  color: var(--color-text);
}
.hero-float-card-2 span {
  font-size: 11px;
  color: var(--color-text-muted);
  display: block;
  line-height: 1.1;
}
.hero-stats {
  position: relative;
  margin-top: 24px;
}
.hero-stats-inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  background: var(--color-surface);
  border-radius: 16px;
  padding: 24px 36px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
}
.stat-item {
  text-align: center;
  flex: 1;
}
.stat-item strong {
  display: block;
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
  font-variant-numeric: tabular-nums;
}
.stat-item span {
  font-size: 13px;
  color: var(--color-text-muted);
}
.anchor-bar {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}
.anchor-bar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 8px;
  height: 56px;
  overflow-x: auto;
  scrollbar-width: none;
}
.anchor-bar-inner::-webkit-scrollbar {
  display: none;
}
.anchor-bar a {
  display: inline-flex;
  align-items: center;
  height: 34px;
  padding: 0 16px;
  border-radius: var(--radius-tag);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: transparent;
  white-space: nowrap;
  transition: all 0.2s;
}
.anchor-bar a:hover {
  color: var(--color-primary);
  background: var(--color-primary-soft);
}
.features-section {
  background: var(--color-surface);
  overflow: hidden;
}
.features-carousel {
  position: relative;
}
.carousel-viewport {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 4px 4px 24px;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.carousel-viewport::-webkit-scrollbar {
  display: none;
}
.carousel-slide {
  flex: 0 0 calc(33.333% - 16px);
  scroll-snap-align: start;
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: all 0.3s;
}
.carousel-slide:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}
.carousel-slide-img {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}
.carousel-slide-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.carousel-slide:hover .carousel-slide-img img {
  transform: scale(1.03);
}
.carousel-slide-body {
  padding: 20px 20px 24px;
}
.carousel-slide-body h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.carousel-slide-body p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}
.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 24px;
}
.carousel-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  transition: all 0.2s;
}
.carousel-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-soft);
}
.carousel-dots {
  display: flex;
  align-items: center;
  gap: 8px;
}
.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border);
  transition: all 0.3s;
  padding: 0;
  border: none;
  cursor: pointer;
}
.carousel-dot.active {
  width: 26px;
  border-radius: 4px;
  background: var(--color-primary);
}
@media (max-width: 991px) {
  .carousel-slide {
    flex-basis: calc(50% - 12px);
  }
}
@media (max-width: 640px) {
  .carousel-slide {
    flex-basis: 85%;
  }
}
.cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.cards-grid .card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}
.cards-grid .card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}
.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
}
.card-icon svg {
  width: 26px;
  height: 26px;
}
.card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--color-text);
}
.card-specs {
  margin-top: 10px;
}
.card-specs li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 0;
  font-size: 14px;
  color: var(--color-text-secondary);
  border-bottom: 1px dashed var(--color-border);
}
.card-specs li:last-child {
  border-bottom: none;
}
.card-specs li .spec-val {
  font-weight: 600;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}
.card-badge {
  position: absolute;
  top: 16px;
  right: 16px;
}
@media (max-width: 991px) {
  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 560px) {
  .cards-grid {
    grid-template-columns: 1fr;
  }
}
.reviews-section {
  background: var(--color-bg);
  position: relative;
}
.reviews-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("/assets/images/backpic/back-2.png");
  background-size: cover;
  background-position: center;
  opacity: 0.04;
  pointer-events: none;
}
.reviews-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 32px;
  align-items: start;
}
.rating-summary {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  padding: 32px 28px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
  text-align: center;
  position: sticky;
  top: 120px;
}
.rating-score {
  font-size: 56px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}
.rating-stars {
  display: flex;
  justify-content: center;
  gap: 4px;
  margin: 14px 0 10px;
}
.rating-stars svg {
  width: 20px;
  height: 20px;
  color: var(--color-accent);
}
.rating-count {
  font-size: 14px;
  color: var(--color-text-muted);
}
.rating-progress {
  margin-top: 18px;
  text-align: left;
}
.rating-progress-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  font-size: 12px;
  color: var(--color-text-muted);
}
.rating-progress-bar {
  flex: 1;
  height: 4px;
  background: var(--color-border);
  border-radius: 4px;
  overflow: hidden;
}
.rating-progress-bar span {
  display: block;
  height: 100%;
  border-radius: 4px;
  background: var(--color-primary);
}
.rating-progress-row .pct {
  width: 36px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.review-card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  padding: 26px 24px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
}
.review-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}
.review-stars {
  display: flex;
  gap: 3px;
  margin-bottom: 14px;
}
.review-stars svg {
  width: 16px;
  height: 16px;
  color: var(--color-accent);
}
.review-text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
  flex: 1;
}
.review-user {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}
.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 15px;
  flex-shrink: 0;
}
.review-user-info strong {
  display: block;
  font-size: 14px;
  color: var(--color-text);
}
.review-user-info span {
  font-size: 12px;
  color: var(--color-text-muted);
}
@media (max-width: 991px) {
  .reviews-layout {
    grid-template-columns: 1fr;
  }
  .rating-summary {
    position: static;
  }
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 640px) {
  .reviews-grid {
    grid-template-columns: 1fr;
  }
}
.faq-section {
  background: var(--color-surface);
}
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--color-border);
  transition: background 0.2s;
}
.faq-item:first-child {
  border-top: 1px solid var(--color-border);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  min-height: 56px;
  padding: 16px 8px;
  background: transparent;
  border: none;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  transition: color 0.2s;
}
.faq-question:hover {
  color: var(--color-primary);
}
.faq-icon {
  position: relative;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}
.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--color-text-muted);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.faq-icon::before {
  width: 14px;
  height: 2px;
}
.faq-icon::after {
  width: 2px;
  height: 14px;
}
.faq-item.active .faq-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}
.faq-item.active .faq-icon::before {
  background: var(--color-primary);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 8px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}
.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 8px 24px;
}
.faq-question:hover .faq-icon::before,
.faq-question:hover .faq-icon::after {
  background: var(--color-primary);
}
.cta-section {
  position: relative;
  background: var(--color-primary-soft);
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("/assets/images/backpic/back-1.png");
  background-size: cover;
  background-position: center;
  opacity: 0.12;
  pointer-events: none;
}
.cta-card {
  position: relative;
  background: var(--color-surface);
  border-radius: 24px;
  padding: 56px 56px;
  box-shadow: var(--shadow-card-hover);
  border: 1px solid var(--color-border);
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: center;
}
.cta-content h2 {
  font-size: var(--fs-h2);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 12px;
  color: var(--color-text);
}
.cta-content > p {
  font-size: 16px;
  color: var(--color-text-secondary);
  margin-bottom: 28px;
}
.download-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.cta-hint {
  margin-top: 16px;
  font-size: 14px;
  color: var(--color-text-muted);
}
.cta-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.qr-box {
  width: 172px;
  height: 172px;
  background: var(--color-text);
  border-radius: 18px;
  padding: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-card-hover);
}
.qr-box svg {
  width: 100%;
  height: 100%;
}
.cta-qr p {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
}
@media (max-width: 991px) {
  .cta-card {
    grid-template-columns: 1fr;
    padding: 40px 32px;
    text-align: center;
  }
  .download-buttons {
    justify-content: center;
  }
}
.news-section {
  background: var(--color-bg);
}
.news-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 32px;
  align-items: start;
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.news-item {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  transition: all 0.25s ease;
  overflow: hidden;
}
.news-item:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}
.news-item-link {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 24px;
  color: inherit;
  text-decoration: none;
}
.news-item-main {
  flex: 1;
  min-width: 0;
}
.news-item-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.news-item-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
  line-height: 1.4;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: color 0.2s;
}
.news-item:hover .news-item-title {
  color: var(--color-primary);
}
.news-item-summary {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-item-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  flex-shrink: 0;
  padding-top: 4px;
}
.news-date {
  font-size: 13px;
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.news-views {
  font-size: 13px;
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.news-empty {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  padding: 60px 40px;
  text-align: center;
}
.news-empty svg {
  width: 72px;
  height: 72px;
  margin: 0 auto 16px;
  color: var(--color-border);
}
.news-empty p {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}
.news-empty .sub {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}
.news-sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: sticky;
  top: 120px;
}
.side-card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  padding: 24px;
}
.side-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 14px;
  color: var(--color-text);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}
.side-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: 10px;
}
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.side-announce {
  background: var(--color-primary-soft);
  border-color: transparent;
}
.side-announce h3 {
  color: var(--color-primary);
  border-bottom-color: rgba(22, 104, 220, 0.12);
}
@media (max-width: 991px) {
  .news-layout {
    grid-template-columns: 1fr;
  }
  .news-sidebar {
    position: static;
  }
  .news-item-link {
    flex-direction: column;
    gap: 10px;
  }
  .news-item-meta {
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
  }
}
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 56px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-brand .logo {
  margin-bottom: 14px;
}
.footer-brand p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 260px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul a {
  font-size: 14px;
  color: var(--color-text-secondary);
  transition: color 0.2s, padding-left 0.2s;
  padding-left: 0;
}
.footer-col ul a:hover {
  color: var(--color-primary);
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: 18px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--color-text-muted);
}
.footer-bottom .icp {
  font-size: 13px;
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}
@media (max-width: 991px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 560px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}
@media (max-width: 1024px) {
  .nav-links {
    display: none;
  }
  .nav-cta {
    display: none;
  }
  .hamburger {
    display: flex;
  }
  .hero-inner {
    grid-template-columns: 1fr;
    padding-top: 48px;
    gap: 40px;
  }
  .hero-visual {
    order: 2;
  }
  .hero-float-card {
    left: 12px;
  }
  .hero h1 {
    font-size: 36px;
  }
}
@media (max-width: 767px) {
  .container {
    padding: 0 16px;
  }
  .top-bar-inner {
    padding: 0 16px;
  }
  .top-bar-right .top-bar-link {
    display: none;
  }
  .top-bar-right .top-bar-btn {
    display: none;
  }
  .version-label {
    display: none;
  }
  .main-nav {
    padding: 0 16px;
  }
  .logo-text {
    font-size: 19px;
  }
  .hero {
    padding-bottom: 48px;
  }
  .hero h1 {
    font-size: 30px;
    line-height: 1.3;
  }
  .hero-subtitle {
    font-size: 16px;
  }
  .hero-trust {
    gap: 8px 16px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .hero-stats-inner {
    flex-wrap: wrap;
    padding: 16px;
    gap: 16px;
  }
  .stat-item {
    flex: 1 1 40%;
  }
  .stat-item strong {
    font-size: 22px;
  }
  .btn-download {
    width: 100%;
  }
  .cta-card {
    padding: 32px 20px;
  }
  .download-buttons {
    flex-direction: column;
    align-items: stretch;
  }
  .qr-box {
    width: 140px;
    height: 140px;
  }
  .hero-float-card-2 {
    display: none;
  }
}

/* roulang page: category1 */
:root {
  --color-primary: #1668DC;
  --color-primary-dark: #1053B3;
  --color-primary-soft: #EAF1FE;
  --color-accent: #00A88B;
  --color-bg: #F4F7FB;
  --color-surface: #FFFFFF;
  --color-text: #1E2A3A;
  --color-text-secondary: #5A6B7E;
  --color-text-muted: #8A98A8;
  --color-border: #E5EBF2;
  --color-dark: #1E2A3A;
  --radius-card: 16px;
  --radius-button: 10px;
  --radius-tag: 999px;
  --shadow-card: 0 4px 16px rgba(20, 40, 80, 0.06), 0 1px 4px rgba(20, 40, 80, 0.04);
  --shadow-hover: 0 12px 32px rgba(20, 40, 80, 0.10), 0 4px 8px rgba(20, 40, 80, 0.06);
  --shadow-nav: 0 1px 8px rgba(20, 40, 80, 0.06);
  --fs-display: 44px;
  --fs-h1: 36px;
  --fs-h2: 28px;
  --fs-h3: 20px;
  --fs-body: 16px;
  --fs-small: 14px;
  --fs-label: 12px;
  --space-unit: 8px;
  --container-width: 1200px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: var(--fs-body);
  line-height: 1.65;
  background: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color 0.2s ease; }
a:hover, a:focus { color: var(--color-primary); }
a:focus, button:focus, input:focus { outline: 2px solid var(--color-primary-soft); outline-offset: 2px; }
ul, ol { list-style: none; }
.container { max-width: var(--container-width); margin: 0 auto; padding: 0 24px; }
section { padding: 80px 0; }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 48px; }
.section-head h2 { font-size: var(--fs-h2); line-height: 1.4; font-weight: 700; color: var(--color-text); margin-bottom: 12px; }
.section-head p { font-size: 16px; color: var(--color-text-secondary); line-height: 1.7; }
.section-head .section-tag { display: inline-block; background: var(--color-primary-soft); color: var(--color-primary); font-size: 13px; font-weight: 600; padding: 4px 14px; border-radius: var(--radius-tag); margin-bottom: 12px; }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-button);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.25s ease;
  white-space: nowrap;
  font-family: inherit;
}
.btn:focus { outline: 2px solid var(--color-primary-soft); outline-offset: 2px; }
.btn-primary { background: var(--color-primary); color: #fff; box-shadow: 0 4px 12px rgba(22, 104, 220, 0.25); }
.btn-primary:hover { background: var(--color-primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 6px 18px rgba(22, 104, 220, 0.32); }
.btn-primary:active { transform: translateY(0); }
.btn-secondary { background: transparent; border: 1px solid var(--color-primary); color: var(--color-primary); }
.btn-secondary:hover { background: var(--color-primary-soft); color: var(--color-primary-dark); transform: translateY(-2px); }
.btn-secondary:active { transform: translateY(0); }
.btn-light { background: #fff; color: var(--color-primary); box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12); }
.btn-light:hover { background: var(--color-primary-soft); color: var(--color-primary-dark); transform: translateY(-2px); }
.btn-sm { height: 40px; padding: 0 20px; font-size: 14px; }
.btn-lg { height: 54px; padding: 0 38px; font-size: 17px; }

/* 顶部状态条 */
.top-bar {
  background: var(--color-primary-soft);
  height: 38px;
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
}
.top-bar-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.top-bar-left { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.online-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-accent);
}
.online-badge::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0, 168, 139, 0.18);
}
.version-label { font-size: 12px; color: var(--color-text-secondary); font-variant-numeric: tabular-nums; }
.countdown-label { font-size: 12px; color: var(--color-accent); font-weight: 500; font-variant-numeric: tabular-nums; }
.top-bar-right { display: flex; align-items: center; gap: 16px; }
.top-bar-link { font-size: 13px; color: var(--color-text-secondary); }
.top-bar-link:hover { color: var(--color-primary); }
.top-bar-btn { font-size: 13px; color: var(--color-primary); font-weight: 600; padding: 4px 14px; border: 1px solid var(--color-primary); border-radius: var(--radius-button); }
.top-bar-btn:hover { background: var(--color-primary); color: #fff; }

/* 导航 */
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255, 255, 255, 0.92); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); box-shadow: var(--shadow-nav); }
.main-nav {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-icon { width: 40px; height: 40px; flex-shrink: 0; }
.logo-text { font-size: 22px; font-weight: 700; color: var(--color-text); line-height: 1; letter-spacing: 0.5px; }
.logo-text small { font-size: 11px; font-weight: 500; color: var(--color-text-muted); margin-left: 4px; letter-spacing: 1px; }
.nav-links { display: flex; align-items: center; gap: 6px; flex: 1; justify-content: center; }
.nav-link {
  position: relative;
  display: inline-block;
  padding: 10px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: 8px;
  transition: all 0.2s ease;
}
.nav-link:hover { color: var(--color-primary); background: var(--color-primary-soft); }
.nav-link.active { color: var(--color-primary); font-weight: 600; }
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-primary);
}
.nav-cta { flex-shrink: 0; }
.hamburger {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-text);
  transition: all 0.2s ease;
}
.hamburger:hover { background: var(--color-primary-soft); color: var(--color-primary); }
.hamburger svg { width: 22px; height: 22px; }

/* 移动端菜单 */
.mobile-menu {
  position: fixed;
  inset: 0;
  background: var(--color-surface);
  z-index: 200;
  display: flex;
  flex-direction: column;
  padding: 24px 32px;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}
.mobile-menu.open { transform: translateX(0); }
.mobile-menu-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 48px; }
.mobile-menu-close { width: 42px; height: 42px; border: 1px solid var(--color-border); background: var(--color-surface); border-radius: 10px; cursor: pointer; color: var(--color-text); display: flex; align-items: center; justify-content: center; }
.mobile-menu-links { display: flex; flex-direction: column; gap: 8px; }
.mobile-menu-links a { font-size: 22px; font-weight: 600; color: var(--color-text); padding: 14px 0; border-bottom: 1px solid var(--color-border); }
.mobile-menu-links a:hover { color: var(--color-primary); }
.mobile-menu-links a.active { color: var(--color-primary); }
.mobile-menu-bottom { margin-top: auto; display: flex; gap: 12px; flex-direction: column; }
.mobile-menu-bottom .btn { width: 100%; }

/* 面包屑 */
.breadcrumb-wrap { padding: 18px 0; background: var(--color-surface); border-bottom: 1px solid var(--color-border); }
.breadcrumb { font-size: 14px; color: var(--color-text-muted); display: flex; align-items: center; flex-wrap: wrap; gap: 8px; }
.breadcrumb a { color: var(--color-text-muted); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb .sep { color: var(--color-border); font-weight: 300; }
.breadcrumb .current { color: var(--color-text-secondary); font-weight: 500; }

/* Banner */
.page-banner {
  position: relative;
  background-image: url("/assets/images/backpic/back-1.png");
  background-size: cover;
  background-position: center;
  padding: 120px 0 100px;
  color: #fff;
  overflow: hidden;
}
.page-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(30, 42, 58, 0.82) 0%, rgba(30, 42, 58, 0.55) 60%, rgba(22, 104, 220, 0.35) 100%);
}
.page-banner .container { position: relative; z-index: 2; }
.page-banner-inner { max-width: 720px; }
.page-banner h1 {
  font-size: var(--fs-h1);
  line-height: 1.35;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 1px;
}
.page-banner p {
  font-size: 18px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 32px;
  max-width: 600px;
}
.anchor-nav { display: flex; flex-wrap: wrap; gap: 10px; }
.anchor-nav a {
  display: inline-flex;
  align-items: center;
  padding: 10px 22px;
  border-radius: var(--radius-tag);
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(6px);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.25s ease;
}
.anchor-nav a:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
  transform: translateY(-2px);
}

/* 功能特性 */
.features-section { background: var(--color-bg); }
.feature-list { display: flex; flex-direction: column; gap: 72px; }
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.feature-media { position: relative; }
.feature-media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.feature-row:hover .feature-media img { transform: scale(1.02); box-shadow: var(--shadow-hover); }
.feature-media::after {
  content: "";
  position: absolute;
  inset: 16px -16px -16px 16px;
  border-radius: var(--radius-card);
  background: var(--color-primary-soft);
  z-index: -1;
}
.feature-content .feature-tag {
  display: inline-block;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: var(--radius-tag);
  margin-bottom: 16px;
}
.feature-content h3 { font-size: var(--fs-h3); font-weight: 700; margin-bottom: 12px; color: var(--color-text); line-height: 1.4; }
.feature-content p { font-size: 15px; line-height: 1.8; color: var(--color-text-secondary); margin-bottom: 12px; }
.feature-content ul { margin-top: 12px; }
.feature-content ul li { position: relative; padding-left: 22px; font-size: 14px; color: var(--color-text-secondary); margin-bottom: 8px; line-height: 1.7; }
.feature-content ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--color-primary);
}
.feature-row.reverse .feature-media { order: 2; }
.feature-row.reverse .feature-content { order: 1; }

/* 版本更新 */
.versions-section { background: var(--color-surface); }
.timeline { position: relative; max-width: 840px; margin: 0 auto; padding-left: 32px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--color-border);
  border-radius: 2px;
}
.timeline-item { position: relative; padding: 0 0 40px 32px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid var(--color-surface);
  box-shadow: 0 0 0 2px var(--color-primary);
  z-index: 1;
}
.timeline-item:last-child::before { background: var(--color-accent); box-shadow: 0 0 0 2px var(--color-accent); }
.timeline-version { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.timeline-version .ver {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.5px;
}
.timeline-version .ver-tag {
  display: inline-flex;
  align-items: center;
  height: 22px;
  padding: 0 10px;
  background: var(--color-accent);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--radius-tag);
}
.timeline-date { font-size: 13px; color: var(--color-text-muted); margin-bottom: 10px; font-variant-numeric: tabular-nums; }
.timeline-item ul { margin-top: 8px; }
.timeline-item ul li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: 6px;
}
.timeline-item ul li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 10px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-border);
  border: 1.5px solid var(--color-primary);
}

/* 对比表 */
.compare-section { background: var(--color-bg); }
.compare-table-wrap {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow-x: auto;
  padding: 0;
}
.compare-table { width: 100%; border-collapse: collapse; min-width: 640px; }
.compare-table th, .compare-table td { padding: 18px 24px; text-align: center; font-size: 14px; border-bottom: 1px solid var(--color-border); }
.compare-table th { background: var(--color-primary-soft); color: var(--color-text); font-weight: 600; font-size: 15px; }
.compare-table th:first-child { text-align: left; border-radius: 0; }
.compare-table td:first-child { text-align: left; color: var(--color-text); font-weight: 500; }
.compare-table tr:last-child td { border-bottom: none; }
.compare-table td .icon-yes { color: var(--color-accent); font-weight: 700; }
.compare-table td .icon-no { color: var(--color-text-muted); }
.compare-table tr:hover td { background: rgba(234, 241, 254, 0.4); }

/* 系统要求 */
.sys-section { background: var(--color-surface); }
.sys-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.sys-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  text-align: center;
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(20, 40, 80, 0.04);
}
.sys-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); border-color: transparent; }
.sys-card .sys-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-soft);
  border-radius: 14px;
  color: var(--color-primary);
}
.sys-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 6px; }
.sys-card .sys-ver { font-size: 13px; color: var(--color-accent); font-weight: 600; margin-bottom: 16px; }
.sys-card ul { text-align: left; }
.sys-card ul li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 7px 0;
  font-size: 13px;
  color: var(--color-text-secondary);
  border-bottom: 1px dashed var(--color-border);
}
.sys-card ul li:last-child { border-bottom: none; }
.sys-card ul li span { font-variant-numeric: tabular-nums; color: var(--color-text); font-weight: 500; }

/* 下载区 */
.download-section { background: var(--color-bg); }
.download-card {
  background: var(--color-surface);
  border-radius: 24px;
  box-shadow: var(--shadow-card);
  padding: 56px;
  text-align: center;
  max-width: 960px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
}
.download-card::before {
  content: "";
  position: absolute;
  top: -40px;
  left: -40px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: var(--color-primary-soft);
  opacity: 0.5;
}
.download-card h2 { font-size: var(--fs-h2); margin-bottom: 12px; }
.download-card > p { color: var(--color-text-secondary); font-size: 16px; max-width: 560px; margin: 0 auto 32px; }
.download-btn-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 20px; }
.download-meta { font-size: 13px; color: var(--color-text-muted); }
.download-meta span { color: var(--color-primary); font-weight: 500; }
.requirements-summary {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 36px;
  border-top: 1px solid var(--color-border);
  padding-top: 32px;
}
.req-item { text-align: center; }
.req-item .req-icon { font-size: 24px; margin-bottom: 4px; }
.req-item p { font-size: 13px; color: var(--color-text-secondary); }
.req-item strong { display: block; font-size: 15px; color: var(--color-text); margin-top: 2px; font-variant-numeric: tabular-nums; }

/* FAQ */
.faq-section { background: var(--color-surface); }
.faq-list { max-width: 840px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  margin-bottom: 16px;
  background: var(--color-surface);
  overflow: hidden;
  transition: box-shadow 0.3s ease;
}
.faq-item:hover { box-shadow: var(--shadow-card); }
.faq-item[open] { box-shadow: var(--shadow-card); border-color: transparent; }
.faq-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  transition: color 0.2s ease;
}
.faq-summary::-webkit-details-marker { display: none; }
.faq-summary .icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: transform 0.3s ease, background 0.3s ease, color 0.3s ease;
}
.faq-item[open] .icon { transform: rotate(45deg); background: var(--color-primary); color: #fff; }
.faq-content { padding: 0 24px 20px; font-size: 15px; line-height: 1.8; color: var(--color-text-secondary); }

/* CTA */
.bottom-cta {
  background: var(--color-primary-soft);
  text-align: center;
  padding: 72px 0;
}
.bottom-cta h2 { font-size: 30px; font-weight: 700; margin-bottom: 12px; color: var(--color-text); }
.bottom-cta p { font-size: 16px; color: var(--color-text-secondary); margin-bottom: 28px; }
.bottom-cta .btn-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* 页脚 */
.site-footer { background: var(--color-surface); border-top: 1px solid var(--color-border); padding: 64px 0 0; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--color-border);
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p { font-size: 14px; line-height: 1.8; color: var(--color-text-secondary); max-width: 320px; }
.footer-col h4 { font-size: 15px; font-weight: 600; margin-bottom: 20px; color: var(--color-text); }
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul li a { font-size: 14px; color: var(--color-text-secondary); transition: color 0.2s ease, padding-left 0.2s ease; }
.footer-col ul li a:hover { color: var(--color-primary); padding-left: 4px; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 24px 0;
  font-size: 14px;
  color: var(--color-text-muted);
}
.footer-bottom .icp { color: var(--color-text-muted); }

/* 响应式 */
@media (max-width: 1199px) {
  .container { padding-left: 32px; padding-right: 32px; }
}
@media (max-width: 1024px) {
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .hamburger { display: flex; }
  .feature-row { gap: 40px; }
  .sys-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  section { padding: 56px 0; }
  .top-bar-inner { padding: 0 16px; }
  .top-bar-right { display: none; }
  .main-nav { padding: 0 16px; height: 64px; }
  .page-banner { padding: 72px 0 56px; }
  .page-banner h1 { font-size: 30px; }
  .page-banner p { font-size: 16px; }
  .feature-row { grid-template-columns: 1fr; gap: 40px; }
  .feature-row.reverse .feature-media { order: 1; }
  .feature-row.reverse .feature-content { order: 2; }
  .feature-media::after { inset: 10px -10px -10px 10px; }
  .timeline { padding-left: 24px; }
  .timeline-item { padding-left: 24px; }
  .timeline-item::before { left: -25px; }
  .sys-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .sys-card { padding: 20px 16px; }
  .download-card { padding: 40px 24px; }
  .requirements-summary { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .anchor-nav { gap: 8px; }
  .anchor-nav a { padding: 8px 16px; font-size: 13px; }
  .btn-group { flex-direction: column; width: 100%; }
  .btn-group .btn { width: 100%; }
  .bottom-cta h2 { font-size: 24px; }
}
@media (max-width: 520px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .top-bar-left { gap: 8px; }
  .version-label { display: none; }
  .countdown-label { font-size: 11px; }
  .page-banner h1 { font-size: 26px; }
  .section-head h2 { font-size: 24px; }
  .sys-grid { grid-template-columns: 1fr; }
  .timeline-version .ver { font-size: 16px; }
  .compare-table th, .compare-table td { padding: 14px 12px; }
  .download-btn-group { flex-direction: column; }
  .download-btn-group .btn { width: 100%; }
}

/* roulang page: article */
:root {
    --color-primary: #1668DC;
    --color-primary-dark: #1155B3;
    --color-primary-soft: rgba(22, 104, 220, 0.08);
    --color-accent: #F5A623;
    --color-bg: #F4F7FB;
    --color-surface: #FFFFFF;
    --color-text: #1E2A3A;
    --color-text-secondary: #5A6B7E;
    --color-text-muted: #8A98A8;
    --color-border: #E5EBF2;
    --shadow-card: 0 4px 16px rgba(20, 40, 80, 0.06), 0 1px 4px rgba(20, 40, 80, 0.04);
    --shadow-card-hover: 0 12px 32px rgba(20, 40, 80, 0.10), 0 4px 8px rgba(20, 40, 80, 0.06);
    --shadow-nav: 0 1px 8px rgba(20, 40, 80, 0.06);
    --radius-card: 16px;
    --radius-button: 10px;
    --radius-tag: 999px;
    --space-unit: 8px;
    --fs-body: 16px;
    --fs-small: 14px;
    --fs-label: 12px;
    --fs-h3: 20px;
    --fs-h2: 28px;
    --fs-h1: 36px;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    font-size: var(--fs-body);
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
  }

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

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

  a:focus-visible,
  button:focus-visible {
    outline: 2px solid var(--color-primary-soft);
    outline-offset: 2px;
    border-radius: 6px;
  }

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

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

  @media (max-width: 767px) {
    .container {
      padding: 0 16px;
    }
  }

  /* ========== 按钮 ========== */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 48px;
    padding: 0 24px;
    border-radius: var(--radius-button);
    font-size: 15px;
    font-weight: 600;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.25s ease;
    white-space: nowrap;
    line-height: 1;
  }

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

  .btn-primary:hover {
    background: var(--color-primary-dark);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(22, 104, 220, 0.25);
  }

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

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

  .btn-sm {
    height: 40px;
    padding: 0 20px;
    font-size: 14px;
  }

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

  .btn-light:hover {
    background: var(--color-primary-soft);
    color: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  }

  .btn-block {
    width: 100%;
  }

  /* ========== 徽章 / 标签 ========== */
  .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    height: 24px;
    padding: 0 12px;
    border-radius: var(--radius-tag);
    font-size: 12px;
    font-weight: 600;
    color: var(--color-primary);
    background: var(--color-primary-soft);
  }

  .tag {
    display: inline-flex;
    align-items: center;
    height: 26px;
    padding: 0 14px;
    border-radius: var(--radius-tag);
    font-size: 12px;
    font-weight: 600;
    color: var(--color-text-secondary);
    background: #F0F4FA;
    transition: all 0.2s ease;
  }

  .tag:hover {
    color: var(--color-primary);
    background: var(--color-primary-soft);
  }

  /* ========== 导航头部 ========== */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--shadow-nav);
  }

  .top-bar {
    background: var(--color-primary-soft);
    border-bottom: 1px solid rgba(229, 235, 242, 0.7);
    min-height: 36px;
  }

  .top-bar-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 36px;
    font-size: 13px;
  }

  .top-bar-left {
    display: flex;
    align-items: center;
    gap: 16px;
  }

  .online-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #00A88B;
    font-weight: 600;
    font-size: 12px;
  }

  .online-badge::before {
    content: "";
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #00A88B;
    box-shadow: 0 0 0 3px rgba(0, 168, 139, 0.18);
  }

  .version-label,
  .countdown-label {
    color: var(--color-text-secondary);
    font-size: 13px;
  }

  .countdown-label {
    color: var(--color-accent);
    font-weight: 600;
    font-variant-numeric: tabular-nums;
  }

  .top-bar-right {
    display: flex;
    align-items: center;
    gap: 14px;
  }

  .top-bar-link {
    font-size: 13px;
    color: var(--color-text-secondary);
    transition: color 0.2s;
  }

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

  .top-bar-btn {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary);
    padding: 4px 12px;
    border: 1px solid rgba(22, 104, 220, 0.35);
    border-radius: 999px;
    transition: all 0.2s;
  }

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

  .main-nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
  }

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

  .logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(22, 104, 220, 0.2);
  }

  .logo-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: 0.5px;
    line-height: 1;
  }

  .logo-text small {
    display: block;
    font-size: 10px;
    letter-spacing: 2.5px;
    color: var(--color-text-muted);
    font-weight: 600;
    margin-top: 3px;
  }

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

  .nav-link {
    display: inline-flex;
    align-items: center;
    height: 72px;
    padding: 0 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text-secondary);
    position: relative;
    transition: color 0.2s;
  }

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

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

  .nav-link.active::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 16px;
    right: 16px;
    height: 2px;
    background: var(--color-primary);
    border-radius: 2px 2px 0 0;
  }

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

  .hamburger {
    display: none;
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    border-radius: 8px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
  }

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

  .hamburger svg {
    width: 22px;
    height: 22px;
  }

  @media (max-width: 1024px) {
    .hamburger {
      display: flex;
    }

    .nav-links {
      position: fixed;
      inset: 0;
      background: var(--color-surface);
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 10px;
      z-index: 1001;
      display: none;
    }

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

    .nav-link {
      height: auto;
      font-size: 20px;
      padding: 14px 20px;
    }

    .nav-link.active::after {
      bottom: 6px;
      left: 20px;
      right: 20px;
      border-radius: 2px;
    }

    .nav-cta {
      margin-right: 8px;
      font-size: 13px;
      padding: 0 14px;
      height: 36px;
    }

    .top-bar-right .top-bar-link {
      display: none;
    }

    .top-bar-left .countdown-label {
      display: none;
    }
  }

  @media (max-width: 520px) {
    .top-bar-inner {
      padding: 0 12px;
    }

    .top-bar-left .version-label {
      display: none;
    }

    .main-nav {
      padding: 0 16px;
      height: 64px;
    }
  }

  /* ========== 面包屑 ========== */
  .breadcrumb {
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px 24px 0;
    font-size: 14px;
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
  }

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

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

  .breadcrumb .sep {
    color: #C3CFDC;
    margin: 0 4px;
  }

  .breadcrumb .current {
    color: var(--color-text-muted);
    max-width: 320px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-weight: 500;
  }

  @media (max-width: 767px) {
    .breadcrumb {
      padding: 20px 16px 0;
    }
  }

  /* ========== 文章两栏布局 ========== */
  .article-page .container {
    padding-top: 24px;
    padding-bottom: 72px;
  }

  .article-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 40px;
    align-items: start;
    margin-top: 24px;
  }

  .article-main {
    background: var(--color-surface);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    padding: 40px 48px 48px;
  }

  /* ========== 文章头部 ========== */
  .article-header {
    margin-bottom: 28px;
  }

  .article-header h1 {
    font-size: var(--fs-h1);
    line-height: 1.35;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 18px;
    letter-spacing: -0.3px;
  }

  .article-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px 18px;
    font-size: 14px;
    color: var(--color-text-muted);
  }

  .meta-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }

  .meta-item svg {
    width: 15px;
    height: 15px;
  }

  .article-cover {
    margin: 0 0 28px;
    border-radius: 12px;
    overflow: hidden;
    aspect-ratio: 16 / 9;
    background: var(--color-bg);
  }

  .article-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  /* ========== 正文排版 ========== */
  .article-content {
    font-size: 17px;
    line-height: 1.9;
    color: var(--color-text);
  }

  .article-content p {
    margin-bottom: 24px;
  }

  .article-content h2 {
    font-size: 24px;
    font-weight: 700;
    line-height: 1.4;
    margin: 40px 0 16px;
    padding-left: 16px;
    border-left: 4px solid var(--color-primary);
    color: var(--color-text);
  }

  .article-content h3 {
    font-size: 20px;
    font-weight: 600;
    line-height: 1.5;
    margin: 32px 0 12px;
    color: var(--color-text);
  }

  .article-content h4 {
    font-size: 17px;
    font-weight: 600;
    margin: 24px 0 10px;
    color: var(--color-text);
  }

  .article-content a {
    text-decoration: underline;
    text-underline-offset: 3px;
  }

  .article-content a:hover {
    text-decoration: none;
  }

  .article-content blockquote {
    border-left: 4px solid var(--color-primary);
    background: var(--color-primary-soft);
    padding: 20px 24px;
    border-radius: 0 8px 8px 0;
    margin: 24px 0;
    color: var(--color-text-secondary);
  }

  .article-content blockquote p:last-child {
    margin-bottom: 0;
  }

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

  .article-content ul li {
    list-style-type: square;
  }

  .article-content ul li::marker {
    color: var(--color-primary);
  }

  .article-content ol li::marker {
    font-weight: 600;
    color: var(--color-primary);
  }

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

  .article-content img {
    border-radius: 12px;
    margin: 20px 0;
    width: auto;
    max-width: 100%;
  }

  .article-content figure {
    margin: 24px 0;
  }

  .article-content figcaption {
    font-size: 14px;
    color: var(--color-text-muted);
    text-align: center;
    margin-top: 8px;
    line-height: 1.5;
  }

  .article-content pre {
    background: #1E2A3A;
    color: #DCE6F0;
    border-radius: 12px;
    padding: 20px 24px;
    overflow-x: auto;
    font-size: 14px;
    line-height: 1.7;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
    margin: 24px 0;
  }

  .article-content code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
    font-size: 0.92em;
  }

  .article-content p code,
  .article-content li code {
    background: #F0F4FA;
    padding: 2px 8px;
    border-radius: 6px;
    color: var(--color-primary-dark);
  }

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

  .article-content hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: 36px 0;
  }

  .article-content iframe {
    max-width: 100%;
    border-radius: 12px;
  }

  /* ========== 文章标签 ========== */
  .article-tags {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    padding: 24px 0 20px;
    border-top: 1px solid var(--color-border);
    margin-top: 36px;
  }

  .article-tags .tag-label {
    font-size: 14px;
    color: var(--color-text-secondary);
    font-weight: 500;
  }

  /* ========== 上一篇 / 下一篇 ========== */
  .article-pagination {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 20px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
  }

  .pagination-prev,
  .pagination-next {
    display: block;
    background: #F8FAFD;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 16px 18px;
    transition: all 0.25s ease;
    min-width: 0;
  }

  .pagination-prev:hover,
  .pagination-next:hover {
    border-color: var(--color-primary);
    background: var(--color-primary-soft);
    transform: translateY(-2px);
    box-shadow: var(--shadow-card);
  }

  .pagination-label {
    display: block;
    font-size: 12px;
    color: var(--color-text-muted);
    margin-bottom: 6px;
    font-weight: 500;
  }

  .pagination-title {
    display: block;
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.4;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .pagination-next {
    text-align: right;
  }

  @media (max-width: 640px) {
    .article-pagination {
      grid-template-columns: 1fr;
    }

    .pagination-next {
      text-align: left;
    }
  }

  /* ========== 相关推荐 ========== */
  .related-posts {
    margin-top: 40px;
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
  }

  .section-title {
    font-size: var(--fs-h3);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 20px;
  }

  .related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .related-card {
    display: block;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 14px;
    overflow: hidden;
    transition: all 0.25s ease;
  }

  .related-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
    border-color: transparent;
  }

  .related-card img {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
  }

  .related-body {
    padding: 16px 18px 18px;
  }

  .related-body h4 {
    font-size: 15px;
    font-weight: 600;
    line-height: 1.45;
    color: var(--color-text);
    margin-bottom: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .related-card:hover .related-body h4 {
    color: var(--color-primary);
  }

  .related-body p {
    font-size: 13px;
    color: var(--color-text-muted);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  /* ========== 内容未找到 ========== */
  .not-found-card {
    padding: 80px 24px;
    text-align: center;
  }

  .not-found-card h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 12px;
  }

  .not-found-card p {
    color: var(--color-text-secondary);
    margin-bottom: 28px;
    font-size: 16px;
  }

  /* ========== 侧边栏 ========== */
  .article-sidebar {
    display: flex;
    flex-direction: column;
    gap: 20px;
  }

  .sidebar-card {
    background: var(--color-surface);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 24px;
  }

  .sidebar-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .sidebar-title svg {
    width: 18px;
    height: 18px;
    color: var(--color-primary);
  }

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

  .hot-list {
    list-style: none;
    padding: 0;
    margin: 0;
  }

  .hot-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
  }

  .hot-list li:last-child {
    border-bottom: none;
    padding-bottom: 0;
  }

  .hot-num {
    width: 26px;
    height: 26px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #F0F4FA;
    color: var(--color-text-muted);
    flex-shrink: 0;
  }

  .hot-list li:nth-child(1) .hot-num {
    background: rgba(245, 166, 35, 0.16);
    color: #E08E00;
  }

  .hot-list li:nth-child(2) .hot-num {
    background: rgba(0, 168, 139, 0.14);
    color: #008A72;
  }

  .hot-list li:nth-child(3) .hot-num {
    background: var(--color-primary-soft);
    color: var(--color-primary);
  }

  .hot-list a {
    flex: 1;
    font-size: 14px;
    color: var(--color-text);
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color 0.2s;
  }

  .hot-list a:hover {
    color: var(--color-primary);
  }

  .hot-view {
    font-size: 12px;
    color: var(--color-text-muted);
    white-space: nowrap;
  }

  .cta-card {
    background: var(--color-primary);
    background-image: linear-gradient(145deg, rgba(255, 255, 255, 0.06) 0%, rgba(255, 255, 255, 0) 60%);
    color: #fff;
    position: relative;
    overflow: hidden;
  }

  .cta-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 10px;
    color: #fff;
  }

  .cta-card p {
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 18px;
    opacity: 0.88;
  }

  .cta-card .cta-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.14);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
  }

  .cta-card .cta-icon svg {
    width: 22px;
    height: 22px;
    color: #fff;
  }

  .cta-card .btn-light {
    background: #fff;
    color: var(--color-primary);
  }

  .cta-card .btn-light:hover {
    background: var(--color-primary-soft);
    color: var(--color-primary-dark);
  }

  .cta-versions {
    font-size: 12px;
    opacity: 0.72;
    margin-top: 12px;
    text-align: center;
  }

  /* ========== 页脚 ========== */
  .site-footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: 64px 0 28px;
    margin-top: 24px;
  }

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

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

  .footer-brand p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    max-width: 300px;
  }

  .footer-col h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 18px;
  }

  .footer-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
  }

  .footer-col li {
    margin-bottom: 12px;
  }

  .footer-col a {
    font-size: 14px;
    color: var(--color-text-secondary);
    transition: all 0.2s;
  }

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

  .footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
  }

  .footer-bottom p {
    font-size: 13px;
    color: var(--color-text-muted);
  }

  .icp {
    font-size: 12px;
    color: var(--color-text-muted);
  }

  @media (max-width: 900px) {
    .footer-grid {
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
  }

  @media (max-width: 520px) {
    .footer-grid {
      grid-template-columns: 1fr;
      gap: 28px;
    }
  }

  /* ========== 响应式文章布局 ========== */
  @media (max-width: 1024px) {
    .article-layout {
      grid-template-columns: 1fr;
      gap: 32px;
    }

    .article-sidebar {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      align-items: start;
    }

    .article-sidebar .cta-card {
      grid-column: 1 / -1;
    }
  }

  @media (max-width: 767px) {
    .article-page .container {
      padding-top: 0;
      padding-bottom: 48px;
    }

    .article-main {
      padding: 28px 20px 36px;
      border-radius: 0;
      box-shadow: none;
    }

    .article-header h1 {
      font-size: 28px;
      line-height: 1.4;
    }

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

    .article-sidebar {
      grid-template-columns: 1fr;
      padding: 0 16px;
    }

    .article-content {
      font-size: 16px;
    }
  }

  @media (max-width: 480px) {
    .article-header h1 {
      font-size: 24px;
    }

    .article-meta {
      flex-wrap: wrap;
      gap: 8px 12px;
    }
  }

/* roulang page: category2 */
:root {
  --color-primary: #1668DC;
  --color-primary-dark: #1154B3;
  --color-primary-soft: #EAF2FE;
  --color-accent: #F5A623;
  --color-bg: #F4F7FB;
  --color-surface: #FFFFFF;
  --color-text: #1E2A3A;
  --color-text-secondary: #5A6B7E;
  --color-text-muted: #8A98A8;
  --color-border: #E5EBF2;
  --radius-card: 16px;
  --radius-button: 10px;
  --radius-tag: 999px;
  --shadow-card: 0 4px 16px rgba(20, 40, 80, 0.06), 0 1px 4px rgba(20, 40, 80, 0.04);
  --shadow-hover: 0 12px 32px rgba(20, 40, 80, 0.10), 0 4px 8px rgba(20, 40, 80, 0.06);
  --shadow-nav: 0 1px 8px rgba(20, 40, 80, 0.06);
  --font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 26px;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color .2s ease, background .2s ease, box-shadow .2s ease; }
a:hover { color: var(--color-primary-dark); }
button { font-family: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
#env, #windows, #macos, #mobile, #network, #account, #faq, #download, #help { scroll-margin-top: 96px; }

/* ===== Header / Nav ===== */
.site-header { background: var(--color-surface); }
.top-bar {
  background: var(--color-primary-soft);
  height: 36px;
  border-bottom: 1px solid rgba(22, 104, 220, 0.08);
}
.top-bar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.top-bar-left { display: flex; align-items: center; gap: 10px; font-size: 12px; }
.online-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #E7F8F2;
  color: #00A88B;
  font-weight: 600;
  font-size: 12px;
  padding: 3px 10px;
  border-radius: var(--radius-tag);
}
.online-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #00A88B;
}
.version-label { color: var(--color-text-secondary); font-size: 12px; }
.countdown-label { color: var(--color-accent); font-size: 12px; font-weight: 600; font-variant-numeric: tabular-nums; }
.top-bar-right { display: flex; align-items: center; gap: 10px; }
.top-bar-link { color: var(--color-text-secondary); font-size: 12px; padding: 4px 6px; }
.top-bar-link:hover { color: var(--color-primary); }
.top-bar-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 600;
  height: 24px;
  padding: 0 12px;
  border-radius: 6px;
  transition: all .2s ease;
}
.top-bar-btn:hover {
  background: var(--color-primary);
  color: #fff;
}
.main-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: rgba(255, 255, 255, 0.92);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-nav);
  padding: 0 max(24px, calc((100vw - 1200px) / 2));
}
.logo { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-icon { width: 36px; height: 36px; flex-shrink: 0; }
.logo-text {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: .5px;
  white-space: nowrap;
}
.logo-text small {
  font-size: 12px;
  color: var(--color-text-muted);
  font-weight: 500;
  margin-left: 6px;
  letter-spacing: 1px;
}
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-link {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-secondary);
  white-space: nowrap;
  position: relative;
  transition: all .2s ease;
}
.nav-link:hover { color: var(--color-primary); background: var(--color-primary-soft); }
.nav-link.active { color: var(--color-primary); font-weight: 600; }
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
}
.nav-cta { flex-shrink: 0; }
.hamburger {
  display: none;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  color: var(--color-text);
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all .2s ease;
  flex-shrink: 0;
}
.hamburger:hover { background: var(--color-primary-soft); color: var(--color-primary); }
.hamburger svg { width: 22px; height: 22px; }
.mobile-menu {
  position: fixed;
  inset: 0;
  background: #fff;
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 28px;
  opacity: 0;
  visibility: hidden;
  transition: all .3s ease;
}
.mobile-menu.open { opacity: 1; visibility: visible; }
.mobile-link {
  font-size: 24px;
  font-weight: 600;
  color: var(--color-text);
  padding: 8px 20px;
  border-radius: 10px;
  transition: all .2s ease;
}
.mobile-link:hover { color: var(--color-primary); background: var(--color-primary-soft); }
.mobile-link.active { color: var(--color-primary); }
.mobile-cta { width: 220px; }
.mobile-menu-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 44px;
  height: 44px;
  border: none;
  background: var(--color-bg);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-text);
}
.mobile-menu-close:hover { background: var(--color-primary-soft); color: var(--color-primary); }
.mobile-menu-close svg { width: 22px; height: 22px; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 24px;
  border-radius: var(--radius-button);
  font-size: 16px;
  font-weight: 600;
  font-family: inherit;
  border: none;
  cursor: pointer;
  transition: all .2s ease;
  text-decoration: none;
  white-space: nowrap;
}
.btn small { font-size: 12px; font-weight: 400; opacity: .85; margin-left: 4px; }
.btn:focus { outline: 2px solid var(--color-primary-soft); outline-offset: 2px; }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover {
  background: var(--color-primary-dark);
  color: #fff;
  box-shadow: 0 6px 16px rgba(22, 104, 220, 0.3);
  transform: translateY(-1px);
}
.btn-secondary {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}
.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-soft);
}
.btn-light { background: #fff; color: var(--color-primary); }
.btn-light:hover {
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}
.btn-sm { height: 40px; padding: 0 18px; font-size: 14px; }
.btn-lg { height: 52px; padding: 0 28px; font-size: 17px; }

/* ===== Page Banner ===== */
.page-banner {
  background: var(--color-primary-soft);
  padding: 60px 0 68px;
  position: relative;
  overflow: hidden;
}
.page-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  opacity: 0.14;
}
.page-banner .container { position: relative; z-index: 1; }
.breadcrumb {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--color-text-muted); transition: color .2s ease; }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb i { font-style: normal; color: var(--color-text-muted); }
.breadcrumb strong { color: var(--color-text-secondary); font-weight: 500; }
.page-banner h1 {
  font-size: 38px;
  line-height: 50px;
  font-weight: 700;
  margin: 0 0 14px;
  color: var(--color-text);
  letter-spacing: .5px;
}
.page-banner .banner-desc {
  font-size: 17px;
  line-height: 28px;
  color: var(--color-text-secondary);
  max-width: 760px;
  margin: 0;
}

/* ===== Section Base ===== */
.section-title {
  font-size: 28px;
  line-height: 38px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--color-text);
}
.section-desc {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin: 0 0 32px;
  line-height: 26px;
}

/* ===== Steps ===== */
.steps-section { padding: 72px 0 40px; }
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
}
.step-card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 32px 28px;
  text-align: center;
  transition: all .25s ease;
}
.step-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.step-num {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
}
.step-num svg { width: 26px; height: 26px; }
.step-card h3 { font-size: 20px; font-weight: 600; margin: 0 0 10px; }
.step-card p { font-size: 14px; line-height: 23px; color: var(--color-text-secondary); margin: 0; }
.steps-preview {
  margin-top: 40px;
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  line-height: 0;
}
.steps-preview img { width: 100%; height: 280px; object-fit: cover; }

/* ===== Help Guides ===== */
.help-section { padding: 72px 0; }
.help-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 32px;
  align-items: start;
  margin-top: 12px;
}
.anchor-sidebar {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 24px;
  position: sticky;
  top: 92px;
}
.anchor-sidebar h3 { font-size: 16px; font-weight: 600; margin: 0 0 16px; color: var(--color-text); }
.anchor-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.anchor-list a {
  display: block;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 14px;
  color: var(--color-text-secondary);
  transition: all .2s ease;
}
.anchor-list a:hover {
  background: var(--color-primary-soft);
  color: var(--color-primary);
  padding-left: 18px;
}
.help-content { display: flex; flex-direction: column; gap: 24px; }
.help-card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 28px 32px;
  transition: box-shadow .25s ease;
}
.help-card:hover { box-shadow: var(--shadow-hover); }
.help-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 14px;
  color: var(--color-text);
  display: flex;
  align-items: center;
}
.help-card h3::before {
  content: "";
  width: 6px;
  height: 20px;
  border-radius: 3px;
  background: var(--color-primary);
  display: inline-block;
  margin-right: 12px;
  flex-shrink: 0;
}
.help-card p { font-size: 14px; line-height: 25px; color: var(--color-text-secondary); margin: 0 0 14px; }
.help-card ul { margin: 0; padding-left: 18px; }
.help-card li { font-size: 14px; line-height: 25px; color: var(--color-text-secondary); margin-bottom: 6px; }
.help-card li::marker { color: var(--color-primary); }
.platform-tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: var(--radius-tag);
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 600;
  margin-right: 8px;
}
.platform-tag.accent { background: rgba(245, 166, 35, 0.12); color: #B5760F; }
.step-list {
  counter-reset: step-counter;
  list-style: none;
  padding: 0;
  margin: 0;
}
.step-list li {
  counter-increment: step-counter;
  position: relative;
  padding: 8px 0 8px 42px;
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 24px;
}
.step-list li::before {
  content: counter(step-counter);
  position: absolute;
  left: 0;
  top: 8px;
  width: 26px;
  height: 26px;
  border-radius: 8px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ===== Download ===== */
.download-section { padding: 72px 0; }
.download-card {
  background: var(--color-surface);
  border-radius: 24px;
  box-shadow: var(--shadow-hover);
  padding: 48px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 44px;
  align-items: center;
}
.download-card h2 { font-size: 28px; line-height: 38px; font-weight: 700; margin: 0 0 12px; color: var(--color-text); }
.download-card .sub { font-size: 15px; line-height: 26px; color: var(--color-text-secondary); margin: 0 0 24px; }
.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 14px;
}
.download-note { font-size: 13px; color: var(--color-text-muted); margin: 0; }
.sys-req-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 28px; }
.sys-req-card { background: var(--color-bg); border-radius: 12px; padding: 20px; }
.sys-req-card h4 { margin: 0 0 8px; font-size: 16px; font-weight: 600; color: var(--color-text); }
.sys-req-card ul { list-style: none; padding: 0; margin: 0; }
.sys-req-card li { font-size: 13px; line-height: 22px; color: var(--color-text-secondary); padding: 3px 0; }
.sys-req-card li:last-child { padding-top: 8px; }
.download-visual { line-height: 0; }
.download-visual img {
  width: 100%;
  border-radius: 16px;
  object-fit: cover;
  box-shadow: var(--shadow-card);
}

/* ===== FAQ ===== */
.faq-section { padding: 72px 0; background: var(--color-bg); }
.faq-list { max-width: 860px; margin: 32px auto 0; }
.faq-item {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  margin-bottom: 16px;
  padding: 0 28px;
  transition: box-shadow .2s ease;
}
.faq-item:hover { box-shadow: var(--shadow-hover); }
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 20px 40px 20px 0;
  position: relative;
  font-weight: 600;
  font-size: 16px;
  color: var(--color-text);
  line-height: 26px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::before {
  content: "";
  position: absolute;
  right: 0;
  top: 22px;
  width: 24px;
  height: 24px;
  border-radius: 8px;
  background: var(--color-primary-soft);
  transition: all .25s ease;
}
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 19px;
  width: 24px;
  height: 24px;
  font-size: 20px;
  font-weight: 400;
  text-align: center;
  line-height: 24px;
  color: var(--color-primary);
  transition: transform .25s ease;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-answer {
  padding: 0 0 22px;
  font-size: 14px;
  line-height: 26px;
  color: var(--color-text-secondary);
}

/* ===== CTA ===== */
.cta-banner {
  background: var(--color-primary);
  padding: 56px 0;
  text-align: center;
}
.cta-banner h2 {
  color: #fff;
  font-size: 28px;
  line-height: 38px;
  font-weight: 700;
  margin: 0 0 10px;
}
.cta-banner p { color: rgba(255, 255, 255, 0.9); font-size: 15px; margin: 0 0 26px; }

/* ===== Footer ===== */
.site-footer { background: var(--color-surface); border-top: 1px solid var(--color-border); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding: 56px 0 40px;
}
.footer-brand .logo { margin-bottom: 14px; }
.footer-brand p {
  font-size: 14px;
  line-height: 23px;
  color: var(--color-text-secondary);
  max-width: 300px;
  margin: 0;
}
.footer-col h4 { font-size: 16px; font-weight: 600; margin: 0 0 16px; color: var(--color-text); }
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { color: var(--color-text-secondary); font-size: 14px; transition: color .2s ease; }
.footer-col a:hover { color: var(--color-primary); }
.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: 20px 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--color-text-muted);
}
.footer-bottom p { margin: 0; }
.icp { font-size: 13px; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .help-layout { grid-template-columns: 1fr; }
  .anchor-sidebar { position: static; }
  .steps-grid { gap: 16px; }
  .step-card { padding: 24px 20px; }
}
@media (max-width: 767px) {
  .top-bar-right { display: none; }
  .countdown-label { font-size: 12px; }
  .page-banner { padding: 44px 0 52px; }
  .page-banner h1 { font-size: 28px; line-height: 38px; }
  .page-banner .banner-desc { font-size: 15px; line-height: 25px; }
  .section-title { font-size: 24px; line-height: 34px; }
  .steps-section { padding: 56px 0 32px; }
  .steps-grid { grid-template-columns: 1fr; }
  .steps-preview img { height: 190px; }
  .help-section { padding: 56px 0; }
  .help-card { padding: 22px 20px; }
  .download-section { padding: 56px 0; }
  .download-card {
    grid-template-columns: 1fr;
    padding: 28px 24px;
    gap: 28px;
  }
  .download-actions { flex-direction: column; }
  .download-actions .btn { width: 100%; }
  .sys-req-grid { grid-template-columns: 1fr; }
  .faq-section { padding: 56px 0; }
  .faq-item { padding: 0 18px; }
  .faq-item summary { font-size: 15px; padding-right: 36px; }
  .cta-banner { padding: 44px 0; }
  .cta-banner h2 { font-size: 24px; line-height: 34px; }
  .cta-banner .btn-lg { width: 240px; display: flex; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; padding: 44px 0 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  .top-bar-left .version-label { display: none; }
  .btn-lg { width: 100%; }
  .nav-cta { display: none; }
  .main-nav { height: 64px; }
  .page-banner h1 { font-size: 24px; line-height: 34px; }
  .step-card { padding: 22px 18px; }
}