/* roulang page: index */
:root {
  --color-bg: oklch(97% 0.008 240);
  --color-surface: oklch(100% 0 0);
  --color-border: oklch(88% 0.012 240);
  --color-accent: oklch(52% 0.18 240);
  --color-accent-hover: oklch(44% 0.20 240);
  --color-accent-light: oklch(94% 0.04 240);
  --color-text-body: oklch(22% 0.02 240);
  --color-text-muted: oklch(52% 0.02 240);
  --color-text-inv: oklch(98% 0 0);
  --shadow-card: 0 2px 12px oklch(52% 0.18 240 / 0.08), 0 1px 3px oklch(0% 0 0 / 0.06);
  --shadow-card-hover: 0 6px 24px oklch(52% 0.18 240 / 0.14);
  --radius-card: 12px;
  --radius-btn: 8px;
  --font-stack: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-stack);
  background: var(--color-bg);
  color: var(--color-text-body);
  line-height: 1.75;
  font-size: 16px;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input { font-family: inherit; }

/* Nav */
.nav-link {
  position: relative;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-body);
  transition: color 0.15s ease-out;
  padding-bottom: 2px;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0; right: 0;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transition: transform 0.15s ease-out;
}
.nav-link:hover, .nav-link.active { color: var(--color-accent); }
.nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); }

/* Cards */
.content-card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow 0.2s ease-out, transform 0.2s ease-out;
}
.content-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}
@media (prefers-reduced-motion: reduce) {
  .content-card:hover { transform: none; }
  * { transition-duration: 0.01ms !important; }
}

/* Buttons */
.btn-primary {
  background: var(--color-accent);
  color: var(--color-text-inv);
  border-radius: var(--radius-btn);
  padding: 0.625rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background 0.15s ease-out, box-shadow 0.15s ease-out;
  display: inline-block;
}
.btn-primary:hover { background: var(--color-accent-hover); box-shadow: 0 2px 8px oklch(52% 0.18 240 / 0.3); }
.btn-primary:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.btn-outline {
  background: transparent;
  color: var(--color-accent);
  border: 1.5px solid var(--color-accent);
  border-radius: var(--radius-btn);
  padding: 0.625rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease-out, color 0.15s ease-out;
  display: inline-block;
}
.btn-outline:hover { background: var(--color-accent); color: var(--color-text-inv); }
.btn-outline:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

/* Badge */
.badge {
  display: inline-block;
  background: var(--color-accent-light);
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 999px;
  padding: 0.2rem 0.75rem;
}
.badge-hot {
  background: oklch(94% 0.04 30);
  color: oklch(45% 0.18 30);
}

/* Section spacing */
section { padding: 4rem 0; }
.section-title {
  font-size: clamp(1.4rem, 3vw, 1.875rem);
  font-weight: 700;
  color: var(--color-text-body);
  line-height: 1.3;
}
.section-sub {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-top: 0.5rem;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }

/* Timeline */
.timeline-item { border-left: 2px solid var(--color-accent); padding-left: 1.25rem; position: relative; }
.timeline-dot {
  width: 1.5rem; height: 1.5rem;
  background: var(--color-accent);
  color: white;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem; font-weight: 700;
  position: absolute; left: -0.75rem; top: 0;
}

/* FAQ */
.faq-item { border-bottom: 1px solid var(--color-border); }
.faq-q {
  width: 100%; text-align: left; background: none; border: none;
  padding: 1.1rem 0; font-size: 0.95rem; font-weight: 600;
  color: var(--color-text-body); cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
  transition: color 0.15s;
}
.faq-q:hover { color: var(--color-accent); }
.faq-a { font-size: 0.9rem; color: var(--color-text-muted); padding-bottom: 1rem; line-height: 1.75; display: none; }
.faq-item.open .faq-a { display: block; }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-icon { transition: transform 0.2s ease-out; font-size: 1.2rem; color: var(--color-accent); flex-shrink: 0; }

/* Stats */
.stat-num { font-size: 2.5rem; font-weight: 800; color: var(--color-accent); font-variant-numeric: tabular-nums; line-height: 1; }

/* Mobile nav */
#mobile-menu { display: none; }
#mobile-menu.open { display: block; }

/* Guarantee icons */
.guarantee-item {
  display: flex; align-items: flex-start; gap: 0.75rem;
  padding: 1rem; background: var(--color-surface);
  border-radius: var(--radius-card); box-shadow: var(--shadow-card);
}
.guarantee-icon {
  width: 2.5rem; height: 2.5rem; border-radius: 8px;
  background: var(--color-accent-light); color: var(--color-accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; flex-shrink: 0;
}

/* Member benefit card */
.benefit-card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 1.5rem;
  border-top: 3px solid var(--color-accent);
  transition: box-shadow 0.2s ease-out, transform 0.2s ease-out;
}
.benefit-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }

/* Latest updates table */
.update-row {
  display: flex; align-items: center; gap: 1rem;
  padding: 0.875rem 1rem;
  border-radius: 8px;
  transition: background 0.15s;
}
.update-row:hover { background: var(--color-accent-light); }

/* Footer */
footer { background: var(--color-text-body); color: var(--color-text-inv); }
.footer-link { color: oklch(75% 0.02 240); font-size: 0.875rem; transition: color 0.15s; display: block; margin-bottom: 0.5rem; }
.footer-link:hover { color: white; }

/* Input */
.form-input {
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-btn);
  padding: 0.625rem 1rem;
  font-size: 0.875rem;
  color: var(--color-text-body);
  background: white;
  outline: none;
  transition: border-color 0.15s;
  width: 100%;
}
.form-input:focus { border-color: var(--color-accent); }

/* Responsive */
@media (max-width: 768px) {
  section { padding: 2.5rem 0; }
  .stat-num { font-size: 2rem; }
  .btn-primary, .btn-outline { width: 100%; text-align: center; }
}
@media (max-width: 520px) {
  .section-title { font-size: 1.3rem; }
}

/* roulang page: category2 */
:root {
  --color-bg: oklch(97% 0.008 240);
  --color-surface: oklch(100% 0 0);
  --color-border: oklch(88% 0.012 240);
  --color-accent: oklch(52% 0.18 240);
  --color-accent-hover: oklch(44% 0.20 240);
  --color-accent-light: oklch(94% 0.04 240);
  --color-text-body: oklch(22% 0.02 240);
  --color-text-muted: oklch(52% 0.02 240);
  --color-text-inv: oklch(98% 0 0);
  --shadow-card: 0 2px 12px oklch(52% 0.18 240 / 0.08), 0 1px 3px oklch(0% 0 0 / 0.06);
  --shadow-card-hover: 0 6px 24px oklch(52% 0.18 240 / 0.14);
  --radius-card: 12px;
  --radius-btn: 8px;
  --font-stack: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font-stack); background: var(--color-bg); color: var(--color-text-body); line-height: 1.75; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.btn-primary {
  display: inline-block;
  background: var(--color-accent);
  color: var(--color-text-inv);
  border-radius: var(--radius-btn);
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  transition: background 0.15s ease-out;
  cursor: pointer;
  border: none;
}
.btn-primary:hover { background: var(--color-accent-hover); }
.btn-outline {
  display: inline-block;
  border: 1.5px solid var(--color-accent);
  color: var(--color-accent);
  border-radius: var(--radius-btn);
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  transition: background 0.15s ease-out, color 0.15s ease-out;
}
.btn-outline:hover { background: var(--color-accent); color: var(--color-text-inv); }
.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-body);
  transition: color 0.15s ease-out;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}
.nav-link:hover, .nav-link.active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}
footer { background: var(--color-text-body); }
.footer-link {
  display: block;
  font-size: 0.875rem;
  color: oklch(75% 0.02 240);
  margin-bottom: 0.5rem;
  transition: color 0.15s ease-out;
}
.footer-link:hover { color: white; }
.list-item {
  display: flex;
  gap: 1.25rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--color-border);
  align-items: flex-start;
}
.list-item:last-child { border-bottom: none; }
.list-thumb {
  width: 10rem;
  flex-shrink: 0;
  aspect-ratio: 16/9;
  border-radius: 8px;
  background: var(--color-accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 1.5rem;
}
.badge {
  display: inline-block;
  background: var(--color-accent-light);
  color: var(--color-accent);
  font-size: 0.75rem;
  border-radius: 999px;
  padding: 0.15rem 0.65rem;
  font-weight: 500;
}
.sidebar-card {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border);
}
.sidebar-thumb {
  width: 3.5rem;
  height: 2.5rem;
  border-radius: 6px;
  background: var(--color-accent-light);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 0.875rem;
}
#mobile-menu { display: none; }
#mobile-menu.open { display: block; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; transform: none !important; }
}
@media (max-width: 767px) {
  .list-thumb { width: 6rem; }
  .btn-primary, .btn-outline { width: 100%; text-align: center; }
}

/* roulang page: category1 */
:root {
  --color-bg: oklch(97% 0.008 240);
  --color-surface: oklch(100% 0 0);
  --color-border: oklch(88% 0.012 240);
  --color-accent: oklch(52% 0.18 240);
  --color-accent-hover: oklch(44% 0.20 240);
  --color-accent-light: oklch(94% 0.04 240);
  --color-text-body: oklch(22% 0.02 240);
  --color-text-muted: oklch(52% 0.02 240);
  --color-text-inv: oklch(98% 0 0);
  --shadow-card: 0 2px 12px oklch(52% 0.18 240 / 0.08), 0 1px 3px oklch(0% 0 0 / 0.06);
  --shadow-card-hover: 0 6px 24px oklch(52% 0.18 240 / 0.14);
  --radius-card: 12px;
  --radius-btn: 8px;
  --font-stack: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font-stack); background: var(--color-bg); color: var(--color-text-body); line-height: 1.75; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input { font-family: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.nav-link { font-size: 0.875rem; font-weight: 500; color: var(--color-text-body); padding-bottom: 2px; border-bottom: 2px solid transparent; transition: color 0.15s ease, border-color 0.15s ease; }
.nav-link:hover, .nav-link.active { color: var(--color-accent); border-bottom-color: var(--color-accent); }
.btn-primary { background: var(--color-accent); color: var(--color-text-inv); border-radius: var(--radius-btn); padding: 0.5rem 1.25rem; font-size: 0.875rem; font-weight: 600; transition: background 0.15s ease; box-shadow: 0 1px 4px oklch(52% 0.18 240 / 0.2); display: inline-block; }
.btn-primary:hover { background: var(--color-accent-hover); }
.btn-outline { border: 1.5px solid var(--color-accent); color: var(--color-accent); border-radius: var(--radius-btn); padding: 0.5rem 1.25rem; font-size: 0.875rem; font-weight: 600; transition: background 0.15s ease, color 0.15s ease; display: inline-block; }
.btn-outline:hover { background: var(--color-accent); color: var(--color-text-inv); }
.card { background: var(--color-surface); border-radius: var(--radius-card); box-shadow: var(--shadow-card); transition: box-shadow 0.2s ease, transform 0.2s ease; overflow: hidden; }
.card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
.badge { display: inline-block; background: var(--color-accent-light); color: var(--color-accent); font-size: 0.75rem; border-radius: 999px; padding: 0.2rem 0.65rem; font-weight: 500; }
.badge-hot { background: oklch(94% 0.04 25); color: oklch(48% 0.18 25); }
.footer-link { display: block; font-size: 0.875rem; color: oklch(75% 0.02 240); margin-bottom: 0.5rem; transition: color 0.15s ease; }
.footer-link:hover { color: white; }
footer { background: var(--color-text-body); }
#mobile-menu { display: none; }
#mobile-menu.open { display: block; }
.filter-btn { border: 1.5px solid var(--color-border); border-radius: 999px; padding: 0.3rem 0.9rem; font-size: 0.875rem; color: var(--color-text-muted); cursor: pointer; transition: background 0.15s, color 0.15s, border-color 0.15s; background: white; }
.filter-btn:hover, .filter-btn.active { background: var(--color-accent); color: white; border-color: var(--color-accent); }
.rank-num { font-family: monospace; font-size: 0.875rem; font-weight: 700; width: 1.75rem; text-align: center; }
.rank-1 { color: oklch(60% 0.18 45); }
.rank-2 { color: oklch(55% 0.12 240); }
.rank-3 { color: oklch(52% 0.10 160); }
.rank-other { color: var(--color-text-muted); }
.faq-item { border-bottom: 1px solid var(--color-border); }
.faq-q { width: 100%; text-align: left; padding: 1.1rem 0; font-weight: 600; font-size: 0.95rem; background: none; border: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; color: var(--color-text-body); }
.faq-q:hover { color: var(--color-accent); }
.faq-a { font-size: 0.9rem; color: var(--color-text-muted); line-height: 1.75; padding-bottom: 1rem; display: none; }
.faq-a.open { display: block; }
.faq-icon { transition: transform 0.2s ease; font-size: 0.8rem; color: var(--color-text-muted); }
.faq-icon.open { transform: rotate(180deg); }
@media (prefers-reduced-motion: reduce) {
  .card:hover { transform: none; }
  * { transition-duration: 0s !important; }
}
@media (max-width: 767px) {
  .btn-primary, .btn-outline { width: 100%; text-align: center; }
}