/* roulang page: index */
:root {
  --bg-primary: #0B0E13;
  --bg-surface: #131920;
  --bg-surface-hover: #1B242E;
  --bg-sidebar: #11161D;
  --bg-input: #0F151C;
  --accent-primary: #00E5A0;
  --accent-primary-hover: #33F0B6;
  --accent-orange: #FF7A45;
  --text-primary: #E8ECEF;
  --text-secondary: #9AA7B4;
  --text-muted: #66737F;
  --border-color: rgba(255,255,255,0.08);
  --border-hover: rgba(0,229,160,0.35);
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-input: 10px;
  --radius-tag: 999px;
  --radius-icon: 12px;
  --shadow-card: 0 4px 24px rgba(0,0,0,0.25);
  --shadow-card-hover: 0 8px 32px rgba(0,0,0,0.4);
  --sidebar-width: 248px;
  --sidebar-collapsed: 76px;
  --topbar-height: 56px;
  --space-section: 90px;
  --space-section-mobile: 48px;
  --font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-family);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .3s ease, border-color .3s ease, background .3s ease; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea, select { font-family: inherit; }
ul, ol { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.main-content { margin-left: var(--sidebar-width); min-height: 100vh; overflow: hidden; }
section { padding: var(--space-section) 0; position: relative; }

/* === Sidebar === */
.sidebar {
  position: fixed;
  left: 0; top: 0; bottom: 0;
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  z-index: 130;
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  transition: width .3s ease, transform .3s ease;
}
.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px 20px;
  border-bottom: 1px solid var(--border-color);
}
.logo-icon {
  width: 46px; height: 46px;
  border-radius: var(--radius-icon);
  background: linear-gradient(135deg, var(--accent-primary) 0%, #00BFA6 60%, #00A8CC 100%);
  display: grid; place-items: center;
  font-size: 22px; font-weight: 800;
  color: #0B0E13;
  flex-shrink: 0;
  box-shadow: 0 0 20px rgba(0,229,160,.25);
}
.logo-text {
  font-size: 15.5px; font-weight: 700;
  color: var(--text-primary);
  line-height: 1.35;
  letter-spacing: .01em;
}
.sidebar-nav { flex: 1; padding: 20px 0; display: flex; flex-direction: column; gap: 2px; }
.sidebar-nav .nav-item {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-btn);
  color: var(--text-secondary);
  font-size: 15px; font-weight: 400;
  border-left: 3px solid transparent;
  transition: background .25s ease, color .25s ease, border-color .25s ease;
  position: relative;
}
.sidebar-nav .nav-item:hover { background: rgba(255,255,255,.045); color: var(--text-primary); }
.sidebar-nav .nav-item:active { background: rgba(255,255,255,.07); }
.sidebar-nav .nav-item:focus-visible { outline: 2px solid var(--accent-primary); outline-offset: 2px; color: var(--text-primary); }
.sidebar-nav .nav-item.active {
  background: rgba(0,229,160,.08);
  color: var(--accent-primary);
  border-left-color: var(--accent-primary);
  font-weight: 600;
}
.sidebar-nav .nav-icon { width: 20px; height: 20px; flex-shrink: 0; display: grid; place-items: center; }
.sidebar-nav .nav-icon svg { width: 19px; height: 19px; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.sidebar-bottom {
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.6;
}
.sidebar-bottom .version-text { display: block; margin-top: 4px; color: var(--text-muted); opacity: .75; }

/* === Topbar (mobile) === */
.topbar {
  display: none;
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--topbar-height);
  background: rgba(17,22,29,.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 150;
  align-items: center; justify-content: space-between;
  padding: 0 16px;
}
.topbar .logo-icon { width: 34px; height: 34px; font-size: 16px; border-radius: 9px; }
.topbar .logo-text { font-size: 14px; }
.menu-btn {
  width: 42px; height: 42px;
  display: grid; place-items: center;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  color: var(--text-primary);
  transition: border-color .3s ease, background .3s ease;
}
.menu-btn:hover { border-color: var(--border-hover); background: var(--bg-surface-hover); }
.menu-btn:focus-visible { outline: 2px solid var(--accent-primary); outline-offset: 2px; }
.menu-btn svg { width: 22px; height: 22px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; }

/* === Mobile drawer === */
.drawer-backdrop {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.6);
  opacity: 0; pointer-events: none;
  transition: opacity .3s ease;
  z-index: 140;
}
.drawer-backdrop.show { opacity: 1; pointer-events: auto; }
.mobile-drawer {
  position: fixed; top: 0; left: 0; bottom: 0;
  width: min(85vw, 320px);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  z-index: 160;
  transform: translateX(-100%);
  transition: transform .32s ease;
  display: flex; flex-direction: column;
  padding: 24px 16px;
}
.mobile-drawer.open { transform: translateX(0); }
.mobile-drawer .drawer-logo {
  display: flex; align-items: center; gap: 12px;
  padding: 6px 8px 18px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 16px;
}
.mobile-drawer .nav-item {
  display: flex; align-items: center; gap: 12px;
  padding: 15px 14px;
  border-radius: var(--radius-btn);
  color: var(--text-secondary);
  font-size: 16px;
  border-left: 3px solid transparent;
  transition: background .25s ease, color .25s ease;
}
.mobile-drawer .nav-item:hover { background: rgba(255,255,255,.05); color: var(--text-primary); }
.mobile-drawer .nav-item.active { background: rgba(0,229,160,.08); color: var(--accent-primary); border-left-color: var(--accent-primary); font-weight: 600; }
.mobile-drawer .drawer-nav { display: flex; flex-direction: column; gap: 4px; flex: 1; }
.mobile-drawer .drawer-bottom { border-top: 1px solid var(--border-color); padding-top: 16px; font-size: 12px; color: var(--text-muted); }

/* === Hero === */
.hero {
  min-height: 100vh;
  display: flex; align-items: center;
  background:
    linear-gradient(100deg, rgba(11,14,19,.94) 25%, rgba(11,14,19,.78) 55%, rgba(11,14,19,.45) 100%),
    url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  position: relative;
  overflow: hidden;
  padding: 100px 0 80px;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  opacity: .35;
}
.hero-inner { display: flex; flex-direction: column; align-items: flex-start; max-width: 680px; position: relative; z-index: 2; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(0,229,160,.1);
  border: 1px solid rgba(0,229,160,.3);
  color: var(--accent-primary);
  font-size: 13px; font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-tag);
  margin-bottom: 24px;
  letter-spacing: .03em;
}
.hero-badge svg { width: 15px; height: 15px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.hero-title {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: .01em;
  color: var(--text-primary);
}
.hero-title .highlight { color: var(--accent-primary); }
.hero-subtitle {
  font-size: clamp(15px, 1.6vw, 18px);
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 32px;
  max-width: 560px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin-bottom: 32px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius-btn);
  font-size: 15px; font-weight: 700;
  line-height: 1.4;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease, background .25s ease, color .25s ease;
  letter-spacing: .02em;
}
.btn:focus-visible { outline: 2px solid var(--accent-primary); outline-offset: 3px; }
.btn-primary {
  background: var(--accent-primary);
  color: #0B0E13;
  box-shadow: 0 4px 20px rgba(0,229,160,.25);
}
.btn-primary:hover { background: var(--accent-primary-hover); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(0,229,160,.35); }
.btn-primary:active { transform: translateY(0); box-shadow: 0 4px 14px rgba(0,229,160,.25); }
.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid rgba(255,255,255,.4);
}
.btn-secondary:hover { border-color: var(--accent-primary); color: var(--accent-primary); transform: translateY(-2px); }
.btn-secondary:active { transform: translateY(0); border-color: rgba(0,229,160,.5); }
.hero-trust { display: flex; flex-wrap: wrap; gap: 18px; align-items: center; }
.trust-item { display: flex; align-items: center; gap: 7px; font-size: 13px; color: var(--text-secondary); }
.trust-item svg { width: 15px; height: 15px; stroke: var(--accent-primary); fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.hero-float-card {
  position: absolute;
  right: 4%; bottom: 60px;
  background: rgba(19,25,32,.85);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(0,229,160,.2);
  border-radius: var(--radius-card);
  padding: 18px 22px;
  box-shadow: var(--shadow-card);
  z-index: 3;
  display: flex; align-items: center; gap: 14px;
  animation: floatPulse 3.2s ease-in-out infinite;
}
.hero-float-card .float-icon {
  width: 42px; height: 42px;
  border-radius: var(--radius-icon);
  background: rgba(0,229,160,.15);
  display: grid; place-items: center;
  color: var(--accent-primary);
  flex-shrink: 0;
}
.hero-float-card .float-icon svg { width: 21px; height: 21px; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.float-num { font-size: 24px; font-weight: 800; color: var(--text-primary); line-height: 1.2; }
.float-label { font-size: 12px; color: var(--text-muted); line-height: 1.4; }
@keyframes floatPulse {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* === Section title === */
.section-head { margin-bottom: 48px; }
.section-title {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  line-height: 1.3;
  padding-left: 16px;
  border-left: 4px solid var(--accent-primary);
  margin-bottom: 14px;
}
.section-desc {
  font-size: 15px;
  color: var(--text-secondary);
  max-width: 640px;
  line-height: 1.8;
  padding-left: 16px;
}

/* === Service list (numbered rows) === */
.service-section { background: var(--bg-primary); }
.service-list { display: flex; flex-direction: column; }
.service-row {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 32px 24px;
  border-bottom: 1px solid var(--border-color);
  border-left: 2px solid transparent;
  transition: background .3s ease, border-color .3s ease, transform .3s ease;
  position: relative;
  border-radius: 4px;
}
.service-row:first-child { border-top: 1px solid var(--border-color); }
.service-row:hover { background: rgba(255,255,255,.03); border-left-color: var(--accent-primary); }
.service-num {
  font-size: 34px; font-weight: 800;
  color: var(--accent-primary);
  width: 72px; flex-shrink: 0;
  transition: color .3s ease;
  line-height: 1;
  letter-spacing: .02em;
}
.service-row:hover .service-num { color: var(--accent-orange); }
.service-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-icon);
  background: rgba(0,229,160,.09);
  display: grid; place-items: center;
  color: var(--accent-primary);
  flex-shrink: 0;
  transition: background .3s ease, color .3s ease, transform .3s ease;
}
.service-row:hover .service-icon { background: rgba(255,122,69,.12); color: var(--accent-orange); transform: scale(1.05); }
.service-icon svg { width: 24px; height: 24px; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.service-content { flex: 1; }
.service-content h3 { font-size: 20px; font-weight: 600; margin-bottom: 6px; line-height: 1.4; }
.service-content p { font-size: 14.5px; color: var(--text-secondary); line-height: 1.7; max-width: 640px; }

/* === Stats === */
.stats-section { background: var(--bg-surface); border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat-item { text-align: center; padding: 24px 16px; }
.stat-item + .stat-item { border-left: 1px dashed rgba(255,255,255,.12); }
.stat-number {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 800;
  color: var(--accent-primary);
  line-height: 1.1;
  letter-spacing: .01em;
}
.stat-number em { font-style: normal; color: var(--accent-orange); font-size: .62em; margin-left: 2px; font-weight: 700; }
.stat-label { margin-top: 10px; font-size: 13px; color: var(--text-secondary); letter-spacing: .05em; }

/* === Case blocks === */
.case-section { background: var(--bg-primary); }
.case-block {
  display: flex;
  align-items: center;
  gap: 56px;
  margin-bottom: 64px;
}
.case-block:last-child { margin-bottom: 0; }
.case-block.reverse { flex-direction: row-reverse; }
.case-visual {
  flex: 1.1;
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  position: relative;
}
.case-visual img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  transition: transform .5s ease;
}
.case-block:hover .case-visual img { transform: scale(1.02); }
.case-info { flex: 1; }
.case-tag {
  display: inline-block;
  background: rgba(255,122,69,.14);
  color: var(--accent-orange);
  font-size: 12px; font-weight: 600;
  padding: 5px 14px;
  border-radius: var(--radius-tag);
  margin-bottom: 14px;
  letter-spacing: .04em;
}
.case-info h3 { font-size: 24px; font-weight: 700; margin-bottom: 14px; line-height: 1.4; }
.case-info p { font-size: 15px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 18px; }
.case-link {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--accent-primary);
  font-size: 15px; font-weight: 600;
  transition: gap .3s ease, color .3s ease;
}
.case-link:hover { gap: 14px; color: var(--accent-primary-hover); }
.case-link:focus-visible { outline: 2px solid var(--accent-primary); outline-offset: 4px; border-radius: 4px; }
.case-link svg { width: 18px; height: 18px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* === Solutions === */
.solutions-section { background: var(--bg-surface); border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); }
.solution-block {
  display: flex;
  gap: 56px;
  align-items: stretch;
  margin-bottom: 56px;
}
.solution-block:last-child { margin-bottom: 0; }
.solution-block.reverse { flex-direction: row-reverse; }
.solution-scene {
  flex: 1;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 36px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.solution-scene::before {
  content: '';
  position: absolute; top: 0; left: 0;
  width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-orange));
  opacity: .6;
}
.solution-scene h3 { font-size: 20px; font-weight: 700; margin-bottom: 16px; line-height: 1.4; }
.solution-scene p { font-size: 14.5px; color: var(--text-secondary); line-height: 1.8; }
.solution-points {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
  padding: 24px 0;
}
.solution-point {
  display: flex; align-items: flex-start; gap: 14px;
  background: var(--bg-primary);
  border-radius: var(--radius-btn);
  padding: 18px 20px;
  border: 1px solid var(--border-color);
  transition: border-color .3s ease, background .3s ease, transform .3s ease;
}
.solution-point:hover { border-color: var(--border-hover); background: var(--bg-surface-hover); transform: translateX(4px); }
.solution-point .point-icon {
  width: 32px; height: 32px;
  border-radius: 9px;
  background: rgba(0,229,160,.12);
  display: grid; place-items: center;
  color: var(--accent-primary);
  flex-shrink: 0;
}
.solution-point .point-icon svg { width: 17px; height: 17px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.solution-point .point-text { font-size: 15px; color: var(--text-primary); line-height: 1.6; font-weight: 500; }

/* === News list === */
.news-section { background: var(--bg-primary); }
.news-list { display: flex; flex-direction: column; }
.news-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px;
  border-bottom: 1px solid var(--border-color);
  border-radius: 4px;
  transition: background .3s ease;
}
.news-item:first-child { border-top: 1px solid var(--border-color); }
.news-item:hover { background: rgba(255,255,255,.03); }
.news-tag {
  flex-shrink: 0;
  background: rgba(255,122,69,.14);
  color: var(--accent-orange);
  font-size: 12px; font-weight: 600;
  padding: 5px 14px;
  border-radius: var(--radius-tag);
  letter-spacing: .04em;
  white-space: nowrap;
}
.news-body { flex: 1; min-width: 0; }
.news-body h3 { font-size: 17px; font-weight: 600; line-height: 1.45; margin-bottom: 4px; }
.news-body h3 a { color: var(--text-primary); transition: color .3s ease; }
.news-body h3 a:hover { color: var(--accent-primary); }
.news-body p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.news-time { flex-shrink: 0; font-size: 13px; color: var(--text-muted); line-height: 1.4; text-align: right; }
.news-arrow {
  flex-shrink: 0;
  width: 36px; height: 36px;
  border-radius: 50%;
  display: grid; place-items: center;
  background: rgba(255,255,255,.04);
  color: var(--text-secondary);
  transition: background .3s ease, color .3s ease, transform .3s ease;
}
.news-arrow:hover { background: rgba(0,229,160,.12); color: var(--accent-primary); transform: translateX(4px); }
.news-arrow svg { width: 17px; height: 17px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.news-empty {
  min-height: 240px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  background: var(--bg-surface);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-card);
  color: var(--text-muted);
}
.news-empty .empty-icon {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: rgba(0,229,160,.08);
  display: grid; place-items: center;
  color: var(--accent-primary);
}
.news-empty .empty-icon svg { width: 28px; height: 28px; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.news-empty p { font-size: 15px; color: var(--text-secondary); }

/* === FAQ === */
.faq-section { background: var(--bg-surface); border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); }
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color .3s ease, box-shadow .3s ease;
}
.faq-item:hover { border-color: rgba(0,229,160,.25); }
.faq-item.active { border-color: rgba(0,229,160,.35); box-shadow: 0 4px 20px rgba(0,0,0,.2); }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  transition: color .3s ease;
  background: transparent;
}
.faq-question:hover { color: var(--accent-primary); }
.faq-question:focus-visible { outline: 2px solid var(--accent-primary); outline-offset: -2px; border-radius: var(--radius-card); }
.faq-icon {
  width: 26px; height: 26px;
  border-radius: 50%;
  display: grid; place-items: center;
  background: rgba(255,255,255,.05);
  color: var(--text-secondary);
  flex-shrink: 0;
  transition: transform .35s ease, background .35s ease, color .35s ease;
}
.faq-icon svg { width: 14px; height: 14px; stroke: currentColor; fill: none; stroke-width: 2.2; stroke-linecap: round; }
.faq-item.active .faq-icon { transform: rotate(45deg); background: rgba(0,229,160,.15); color: var(--accent-primary); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s ease, padding .4s ease;
  padding: 0 24px;
  border-left: 2px solid var(--accent-primary);
  margin: 0 4px;
  background: rgba(0,229,160,.02);
}
.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 6px 24px 20px 26px;
}
.faq-answer p { font-size: 14.5px; color: var(--text-secondary); line-height: 1.85; margin-bottom: 10px; }

/* === Contact === */
.contact-section { background: var(--bg-primary); }
.contact-wrap {
  display: flex;
  gap: 48px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 48px;
  box-shadow: var(--shadow-card);
}
.contact-info { flex: 1; }
.contact-info h3 { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.contact-info .contact-desc { font-size: 14px; color: var(--text-secondary); margin-bottom: 28px; line-height: 1.8; }
.contact-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 22px;
}
.contact-item .contact-icon {
  width: 38px; height: 38px;
  border-radius: var(--radius-icon);
  background: rgba(0,229,160,.1);
  display: grid; place-items: center;
  color: var(--accent-primary);
  flex-shrink: 0;
}
.contact-item .contact-icon svg { width: 18px; height: 18px; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.contact-item .contact-text h4 { font-size: 15px; font-weight: 600; margin-bottom: 2px; }
.contact-item .contact-text p { font-size: 13.5px; color: var(--text-secondary); line-height: 1.6; }
.contact-form-wrap { flex: 1.2; }
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
}
.form-group input,
.form-group textarea {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-input);
  padding: 13px 15px;
  font-size: 15px;
  color: var(--text-primary);
  transition: border-color .3s ease, box-shadow .3s ease;
  width: 100%;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(0,229,160,.15);
}
.form-group input:hover:not(:focus),
.form-group textarea:hover:not(:focus) { border-color: rgba(255,255,255,.16); }
.form-group textarea { min-height: 120px; resize: vertical; }
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }
.contact-form .btn-primary { align-self: flex-start; }

/* === CTA band === */
.cta-band {
  background:
    linear-gradient(90deg, rgba(11,14,19,.92) 30%, rgba(11,14,19,.65) 100%),
    url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
  padding: 70px 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
}
.cta-band .container { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.cta-title { font-size: clamp(22px, 2.6vw, 30px); font-weight: 700; line-height: 1.4; margin-bottom: 6px; }
.cta-text { font-size: 15px; color: var(--text-secondary); }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* === Footer === */
.site-footer {
  background: var(--bg-sidebar);
  border-top: 1px solid var(--border-color);
  padding: 56px 0 0;
  position: relative;
}
.site-footer::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
  opacity: .5;
}
.footer-content {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  padding-bottom: 40px;
  flex-wrap: wrap;
}
.footer-brand { flex: 1.2; min-width: 260px; }
.footer-brand .footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-brand .logo-icon { width: 36px; height: 36px; font-size: 17px; border-radius: 10px; }
.footer-brand .footer-logo-text { font-size: 17px; font-weight: 700; color: var(--text-primary); }
.footer-brand p { font-size: 13.5px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 12px; }
.footer-links { flex: 2; display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.footer-col h4 { font-size: 15px; font-weight: 600; color: var(--text-primary); margin-bottom: 14px; }
.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  padding: 5px 0;
  transition: color .3s ease, padding-left .3s ease;
}
.footer-col a:hover { color: var(--accent-primary); padding-left: 6px; }
.footer-col a:focus-visible { outline: 2px solid var(--accent-primary); outline-offset: 2px; border-radius: 4px; }
.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
}
.footer-bottom a { color: var(--text-muted); transition: color .3s ease; }
.footer-bottom a:hover { color: var(--accent-primary); }

/* === Responsive === */
@media (max-width: 1023px) {
  .sidebar {
    width: var(--sidebar-collapsed);
    padding: 20px 10px;
  }
  .sidebar .logo-text,
  .sidebar .sidebar-bottom p,
  .sidebar .sidebar-bottom .version-text { display: none; }
  .sidebar-logo { justify-content: center; padding: 6px 0 16px; }
  .sidebar-nav .nav-item { justify-content: center; padding: 14px 10px; position: relative; }
  .sidebar-nav .nav-item .nav-label {
    position: absolute;
    left: calc(100% + 14px);
    top: 50%;
    transform: translateY(-50%);
    background: var(--bg-surface-hover);
    padding: 7px 14px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
    box-shadow: var(--shadow-card);
    opacity: 0;
    pointer-events: none;
    transition: opacity .22s ease;
    z-index: 300;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
  }
  .sidebar-nav .nav-item:hover .nav-label,
  .sidebar-nav .nav-item:focus .nav-label { opacity: 1; }
  .main-content { margin-left: var(--sidebar-collapsed); }
  .contact-wrap { flex-direction: column; }
  .hero-float-card { right: 20px; bottom: 30px; }
}
@media (max-width: 767px) {
  .sidebar { display: none; }
  .topbar { display: flex; }
  .main-content { margin-left: 0; padding-top: var(--topbar-height); }
  section { padding: var(--space-section-mobile) 0; }
  .hero { min-height: auto; padding: 48px 0 56px; }
  .hero-title { font-size: clamp(28px, 7vw, 36px); }
  .hero-subtitle { font-size: 15px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  .hero-float-card { display: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .stat-item + .stat-item { border-left: none; }
  .stat-item:nth-child(odd) { border-right: 1px dashed rgba(255,255,255,.12); }
  .stat-item:nth-child(n+3) { border-top: 1px dashed rgba(255,255,255,.12); }
  .case-block,
  .case-block.reverse { flex-direction: column; gap: 28px; margin-bottom: 48px; }
  .case-visual img { height: 220px; }
  .solution-block,
  .solution-block.reverse { flex-direction: column; gap: 24px; }
  .solution-scene { padding: 26px; }
  .news-item { flex-wrap: wrap; gap: 12px; padding: 18px; }
  .news-time { text-align: left; }
  .news-arrow { display: none; }
  .contact-wrap { padding: 28px 20px; gap: 32px; }
  .cta-band { padding: 44px 0; }
  .cta-band .container { flex-direction: column; text-align: center; }
  .cta-actions { justify-content: center; }
  .footer-content { flex-direction: column; gap: 32px; }
  .footer-links { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .footer-brand { min-width: 100%; }
  .faq-question { padding: 18px 18px; font-size: 15px; }
  .faq-answer { padding: 0 18px; }
  .faq-item.active .faq-answer { padding: 6px 18px 18px 20px; }
  .service-row { flex-wrap: wrap; gap: 14px; padding: 24px 16px; }
  .service-num { width: auto; font-size: 26px; }
  .service-content { flex-basis: 100%; }
}
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .form-group input,
  .form-group textarea { font-size: 16px; }
  .footer-links { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* roulang page: article */
:root {
  --bg-primary: #0B0E13;
  --bg-surface: #131920;
  --bg-nav: #11161D;
  --bg-hover: #1B242E;
  --bg-input: #0F151C;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(0, 229, 160, 0.35);
  --accent: #00E5A0;
  --accent-hover: #33F0B6;
  --orange: #FF7A45;
  --text-primary: #E8ECEF;
  --text-secondary: #9AA7B4;
  --text-muted: #66737F;
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-input: 10px;
  --radius-badge: 999px;
  --radius-icon: 12px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.25);
  --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.4);
  --font-stack: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-stack);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.75;
  font-size: 15px;
  letter-spacing: 0;
  min-height: 100vh;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color .2s ease, border-color .2s ease, background .2s ease, box-shadow .2s ease, transform .2s ease;
}
img {
  max-width: 100%;
  display: block;
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}
ul, ol {
  list-style: none;
}
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  transition: all .25s ease;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--accent);
  color: #0a1210;
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 229, 160, 0.25);
}
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.35);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* ========== 左侧导航 ========== */
.app-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 248px;
  height: 100vh;
  background: var(--bg-nav);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  z-index: 100;
  padding: 0;
}
.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 24px 20px;
  border-bottom: 1px solid var(--border-color);
}
.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-icon);
  background: linear-gradient(135deg, var(--accent), #00b37a);
  color: #07110d;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  flex-shrink: 0;
}
.logo-text {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  letter-spacing: 0;
}
.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  overflow-y: auto;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 10px;
  margin-bottom: 4px;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  position: relative;
  transition: background .2s ease, color .2s ease;
}
.nav-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}
.nav-item.active {
  background: rgba(0, 229, 160, 0.08);
  color: var(--accent);
}
.nav-item.active::before {
  content: "";
  position: absolute;
  left: -12px;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 24px;
  border-radius: 0 3px 3px 0;
  background: var(--accent);
}
.nav-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.nav-icon svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.sidebar-bottom {
  padding: 16px 20px;
  border-top: 1px solid var(--border-color);
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ========== 移动端顶栏 ========== */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 56px;
  background: var(--bg-nav);
  border-bottom: 1px solid var(--border-color);
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 120;
}
.mobile-logo {
  display: flex;
  align-items: center;
  gap: 8px;
}
.mobile-logo .logo-icon {
  width: 32px;
  height: 32px;
  font-size: 16px;
}
.mobile-logo span {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}
.hamburger-btn {
  width: 40px;
  height: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: 8px;
}
.hamburger-btn span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all .3s ease;
}

.drawer-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  z-index: 130;
  opacity: 0;
  transition: opacity .3s ease;
}
.drawer-overlay.show {
  display: block;
  opacity: 1;
}
.mobile-drawer {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 280px;
  height: 100vh;
  background: var(--bg-nav);
  z-index: 140;
  transform: translateX(-100%);
  transition: transform .3s ease;
  flex-direction: column;
  padding: 0;
}
.mobile-drawer.open {
  transform: translateX(0);
}
.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--border-color);
}
.drawer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 700;
}
.drawer-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  font-size: 22px;
  color: var(--text-secondary);
}
.drawer-close:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}
.drawer-nav {
  padding: 12px;
  flex: 1;
  overflow-y: auto;
}
.drawer-nav .nav-item {
  padding: 14px;
  font-size: 15px;
}

/* ========== 主内容区 ========== */
.main-content {
  margin-left: 248px;
  min-height: calc(100vh - 200px);
  display: flex;
  flex-direction: column;
}
.article-page {
  flex: 1;
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 36px 32px 80px;
}

/* ========== 面包屑 ========== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.breadcrumb a {
  color: var(--text-secondary);
  transition: color .2s ease;
}
.breadcrumb a:hover {
  color: var(--accent);
}
.breadcrumb .breadcrumb-sep {
  color: var(--text-muted);
}
.breadcrumb .current {
  color: var(--text-primary);
  font-weight: 500;
}

/* ========== 文章头部 ========== */
.article-header {
  margin-bottom: 36px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}
.category-badge {
  display: inline-block;
  padding: 4px 16px;
  border-radius: var(--radius-badge);
  background: rgba(255, 122, 69, 0.15);
  color: var(--orange);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 16px;
}
.article-header h1 {
  font-size: clamp(28px, 4.2vw, 38px);
  font-weight: 800;
  line-height: 1.3;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: 0;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.editorial-note {
  background: var(--bg-surface);
  border-left: 3px solid var(--accent);
  padding: 18px 22px;
  border-radius: 0 12px 12px 0;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  letter-spacing: 0.02em;
  margin: 0;
}

/* ========== 正文 ========== */
.article-body {
  max-width: 720px;
  margin: 0 auto 40px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}
.article-body h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 38px 0 18px;
  line-height: 1.4;
  padding-left: 14px;
  border-left: 4px solid var(--accent);
}
.article-body h3 {
  font-size: 19px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 30px 0 14px;
  line-height: 1.45;
}
.article-body p {
  margin-bottom: 20px;
  color: var(--text-secondary);
}
.article-body p strong {
  color: var(--text-primary);
  font-weight: 700;
}
.article-body a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-body a:hover {
  color: var(--accent-hover);
}
.article-body img {
  border-radius: 12px;
  margin: 28px 0;
  box-shadow: var(--shadow-card);
}
.article-body blockquote {
  border-left: 3px solid var(--accent);
  background: var(--bg-surface);
  padding: 18px 24px;
  border-radius: 0 12px 12px 0;
  margin: 28px 0;
  color: var(--text-secondary);
  font-style: normal;
}
.article-body ul,
.article-body ol {
  margin: 16px 0 22px;
  padding-left: 24px;
  color: var(--text-secondary);
}
.article-body ul li {
  list-style: disc;
  margin-bottom: 8px;
  padding-left: 4px;
}
.article-body ol li {
  list-style: decimal;
  margin-bottom: 8px;
  padding-left: 4px;
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 14px;
  border-radius: 8px;
  overflow: hidden;
}
.article-body th {
  background: var(--bg-surface);
  color: var(--text-primary);
  font-weight: 600;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  text-align: left;
}
.article-body td {
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}
.article-body hr {
  border: none;
  height: 1px;
  background: var(--border-color);
  margin: 32px 0;
}
.article-body code {
  background: var(--bg-surface);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 14px;
  color: var(--accent);
}
.article-body pre {
  background: var(--bg-surface);
  padding: 20px;
  border-radius: 12px;
  overflow-x: auto;
  margin: 24px 0;
  border: 1px solid var(--border-color);
  line-height: 1.6;
}
.article-body pre code {
  background: none;
  padding: 0;
  color: var(--text-primary);
}

/* ========== 相关推荐 ========== */
.related-section {
  max-width: 720px;
  margin: 0 auto;
  padding-top: 40px;
  border-top: 1px solid var(--border-color);
}
.related-section h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.related-section h2::before {
  content: "";
  width: 4px;
  height: 22px;
  background: var(--accent);
  border-radius: 4px;
}
.related-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 32px;
}
.related-card {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 16px;
  transition: all .25s ease;
  overflow: hidden;
}
.related-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.related-cover {
  width: 140px;
  height: 88px;
  border-radius: 10px;
  overflow: hidden;
  flex-shrink: 0;
  background: var(--bg-hover);
}
.related-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.related-card:hover .related-cover img {
  transform: scale(1.04);
}
.related-info {
  flex: 1;
  min-width: 0;
}
.related-info h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.5;
  margin-bottom: 6px;
  transition: color .2s ease;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card:hover .related-info h3 {
  color: var(--accent);
}
.related-date {
  font-size: 12px;
  color: var(--text-muted);
}
.article-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 8px;
}

/* ========== 内容未找到 ========== */
.not-found-box {
  max-width: 480px;
  margin: 80px auto;
  text-align: center;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 56px 40px;
  box-shadow: var(--shadow-card);
}
.not-found-icon {
  font-size: 56px;
  margin-bottom: 16px;
}
.not-found-box h1 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.not-found-box p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 24px;
}

/* ========== 页脚 ========== */
.site-footer {
  margin-left: 248px;
  background: var(--bg-nav);
  border-top: 1px solid rgba(0, 229, 160, 0.25);
  padding-top: 56px;
}
.footer-content {
  display: grid;
  grid-template-columns: 1.4fr 2fr;
  gap: 48px;
  padding-bottom: 40px;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-logo-text {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 10px;
}
.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 2.1;
  transition: color .2s ease, padding-left .2s ease;
}
.footer-col a:hover {
  color: var(--accent);
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding: 20px 24px;
  text-align: center;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
}
.footer-bottom a {
  color: var(--text-muted);
}
.footer-bottom a:hover {
  color: var(--accent);
}

/* ========== 响应式 ========== */
@media (max-width: 1023px) and (min-width: 768px) {
  .app-sidebar {
    width: 76px;
  }
  .sidebar-logo {
    justify-content: center;
    padding: 20px 0;
  }
  .logo-text {
    display: none;
  }
  .sidebar-logo .logo-icon {
    margin: 0;
  }
  .nav-item {
    justify-content: center;
    padding: 14px;
  }
  .nav-label {
    display: none;
  }
  .nav-icon {
    margin: 0;
  }
  .nav-item.active::before {
    left: -12px;
  }
  .nav-item:hover .nav-label {
    display: block;
    position: absolute;
    left: 64px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--bg-hover);
    padding: 6px 12px;
    border-radius: 8px;
    white-space: nowrap;
    z-index: 20;
    font-size: 13px;
    font-weight: 500;
    box-shadow: var(--shadow-card);
  }
  .sidebar-bottom {
    text-align: center;
    padding: 12px 0;
  }
  .sidebar-bottom p {
    font-size: 11px;
  }
  .main-content {
    margin-left: 76px;
  }
  .site-footer {
    margin-left: 76px;
  }
}

@media (max-width: 767px) {
  .app-sidebar {
    display: none;
  }
  .mobile-header {
    display: flex;
  }
  .mobile-drawer {
    display: flex;
  }
  .main-content {
    margin-left: 0;
    padding-top: 56px;
    min-height: calc(100vh - 56px);
  }
  .site-footer {
    margin-left: 0;
  }
  .article-page {
    padding: 28px 16px 48px;
  }
  .footer-content {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-left: 20px;
    padding-right: 20px;
  }
  .footer-links {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .related-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 14px;
  }
  .related-cover {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
  }
  .related-cover img {
    height: 100%;
  }
  .article-header h1 {
    font-size: 24px;
  }
  .article-body {
    font-size: 15px;
  }
  .article-body h2 {
    font-size: 20px;
  }
  .article-body h3 {
    font-size: 17px;
  }
  .not-found-box {
    margin: 48px auto;
    padding: 40px 24px;
  }
}

@media (max-width: 520px) {
  .article-page {
    padding: 20px 12px 40px;
  }
  .footer-bottom {
    padding: 16px 12px;
  }
  .footer-bottom p {
    font-size: 12px;
  }
}

/* roulang page: category1 */
:root {
  --primary: #00E5A0;
  --primary-light: #33F0B6;
  --accent: #FF7A45;
  --bg: #0B0E13;
  --bg-deep: #090C10;
  --surface: #131920;
  --surface-2: #151C24;
  --surface-hover: #1B242E;
  --border: rgba(255,255,255,0.08);
  --border-hover: rgba(0,229,160,0.35);
  --text: #E8ECEF;
  --text-secondary: #9AA7B4;
  --text-muted: #66737F;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.25);
  --shadow-hover: 0 8px 32px rgba(0,0,0,0.4);
  --font: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --sidebar-w: 248px;
  --sidebar-w-tablet: 76px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, select, textarea { font-family: inherit; font-size: inherit; color: inherit; }
ul, ol { list-style: none; }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; box-shadow: 0 0 0 4px rgba(0,229,160,0.15); }
.container { max-width: 1200px; margin: 0 auto; padding-left: 24px; padding-right: 24px; }
.text-primary { color: var(--primary); }
.text-accent { color: var(--accent); }

/* ===== Sidebar ===== */
.sidebar {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: var(--sidebar-w);
  background: #11161D;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 100;
}
.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 24px 20px 20px;
  border-bottom: 1px solid var(--border);
}
.logo-icon {
  width: 40px; height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), #00B37F);
  color: #0B0E13;
  font-size: 20px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.logo-text {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  overflow-y: auto;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 14px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 14.5px;
  font-weight: 500;
  transition: background 0.25s, color 0.25s, transform 0.15s;
  position: relative;
}
.nav-item .nav-icon {
  width: 22px; height: 22px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.nav-item .nav-icon svg {
  width: 22px; height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.nav-item:hover {
  background: var(--surface);
  color: var(--text);
}
.nav-item.active {
  background: rgba(0,229,160,0.08);
  color: var(--primary);
  font-weight: 600;
}
.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0; top: 10px; bottom: 10px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--primary);
}
.nav-item:active { transform: scale(0.98); }
.sidebar-bottom {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ===== Mobile Topbar & Drawer ===== */
.mobile-topbar {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 56px;
  background: #11161D;
  border-bottom: 1px solid var(--border);
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 200;
}
.mobile-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}
.menu-toggle {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  width: 40px; height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text);
  transition: border-color 0.25s, background 0.25s;
}
.menu-toggle:hover { border-color: var(--primary); background: rgba(0,229,160,0.06); }
.menu-toggle svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }
.mobile-drawer {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: 280px;
  background: #11161D;
  z-index: 300;
  transform: translateX(-100%);
  transition: transform 0.32s ease;
  display: flex;
  flex-direction: column;
}
.mobile-drawer.open { transform: translateX(0); }
.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 16px 12px;
  border-bottom: 1px solid var(--border);
}
.drawer-close {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 24px;
  cursor: pointer;
  width: 36px; height: 36px;
  line-height: 1;
  border-radius: var(--radius-sm);
  transition: color 0.2s, background 0.2s;
}
.drawer-close:hover { color: var(--primary); background: rgba(0,229,160,0.08); }
.drawer-nav { padding: 16px 12px; display: flex; flex-direction: column; gap: 4px; }
.drawer-nav .nav-item { padding: 14px; font-size: 16px; }
.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 250;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}
.drawer-overlay.show { opacity: 1; visibility: visible; }
body.no-scroll { overflow: hidden; }

/* ===== Main Layout ===== */
.main-content { margin-left: var(--sidebar-w); }
.section { padding: 90px 0; }
.section-header {
  margin-bottom: 48px;
  max-width: 720px;
}
.section-header .eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.section-header h2 {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  line-height: 1.3;
  position: relative;
  padding-left: 18px;
  margin-bottom: 14px;
}
.section-header h2::before {
  content: '';
  position: absolute;
  left: 0; top: 6px; bottom: 6px;
  width: 4px;
  border-radius: 4px;
  background: var(--primary);
}
.section-header p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.75;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 640px;
  display: flex;
  align-items: center;
  padding: 80px 0;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(11,14,19,0.92) 0%, rgba(11,14,19,0.78) 45%, rgba(11,14,19,0.4) 100%);
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}
.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 640px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(0,229,160,0.12);
  border: 1px solid rgba(0,229,160,0.3);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 22px;
}
.hero-badge .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--primary);
  animation: pulse 1.8s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.35); }
}
.hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 18px;
  letter-spacing: 0.01em;
}
.hero-sub {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 34px;
  max-width: 540px;
}
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s, border-color 0.2s;
  line-height: 1.4;
}
.btn-primary {
  background: var(--primary);
  color: #0B0E13;
}
.btn-primary:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0,229,160,0.3);
}
.btn-primary:active { transform: translateY(0) scale(0.98); }
.btn-ghost {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.45);
  color: var(--text);
}
.btn-ghost:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}
.btn-ghost:active { transform: scale(0.98); }
.hero-float-card {
  position: absolute;
  right: 48px;
  bottom: 48px;
  z-index: 3;
  background: rgba(17,22,29,0.88);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px 26px;
  box-shadow: var(--shadow);
  width: 240px;
}
.float-card-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 10px;
}
.float-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 10px rgba(0,229,160,0.6);
}
.float-number {
  font-size: 34px;
  font-weight: 800;
  color: var(--text);
  line-height: 1.1;
  letter-spacing: 0.02em;
}
.float-number em { font-style: normal; color: var(--primary); font-size: 20px; }
.hero-float-card p { font-size: 12.5px; color: var(--text-muted); margin-top: 6px; }

/* ===== Split Section ===== */
.split-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
}
.split-row:last-child { margin-bottom: 0; }
.split-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  position: relative;
}
.split-media::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  pointer-events: none;
}
.split-media img {
  width: 100%;
  height: 340px;
  object-fit: cover;
  transition: transform 0.5s;
}
.split-row:hover .split-media img { transform: scale(1.02); }
.split-content h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.4;
}
.split-content p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.85;
  margin-bottom: 20px;
}
.tag-list { display: flex; flex-wrap: wrap; gap: 10px; }
.tag {
  display: inline-flex;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: border-color 0.25s, color 0.25s;
}
.tag:hover { border-color: var(--border-hover); color: var(--primary); }

/* ===== Stats Strip ===== */
.stats-strip {
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 46px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-item { text-align: center; position: relative; }
.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -12px; top: 12%; bottom: 12%;
  width: 0;
  border-right: 1px dashed rgba(255,255,255,0.12);
}
.stat-item strong {
  display: block;
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
  margin-bottom: 8px;
}
.stat-item span {
  font-size: 13.5px;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
}

/* ===== Category Cards ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.category-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
  position: relative;
  overflow: hidden;
}
.category-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), rgba(0,229,160,0.1));
  opacity: 0;
  transition: opacity 0.3s;
}
.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-hover);
}
.category-card:hover::before { opacity: 1; }
.card-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: rgba(0,229,160,0.1);
  border: 1px solid rgba(0,229,160,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  color: var(--primary);
}
.card-icon svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.category-card h3 { font-size: 19px; font-weight: 600; margin-bottom: 10px; }
.category-card p { color: var(--text-secondary); font-size: 14px; line-height: 1.75; margin-bottom: 18px; }
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--primary);
  transition: gap 0.2s;
}
.card-link:hover { gap: 12px; }
.card-link svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* ===== Process Steps ===== */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}
.process-step {
  text-align: center;
  padding: 32px 18px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.process-step:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-hover);
}
.step-num {
  font-size: 42px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 16px;
  opacity: 0.85;
}
.process-step h4 { font-size: 17px; font-weight: 600; margin-bottom: 10px; }
.process-step p { font-size: 13.5px; color: var(--text-secondary); line-height: 1.7; }

/* ===== Game List ===== */
.game-list {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.game-item {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 20px 28px;
  border-bottom: 1px solid var(--border);
  transition: background 0.25s;
}
.game-item:last-child { border-bottom: none; }
.game-item:hover { background: var(--surface-hover); }
.game-index {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-muted);
  width: 40px;
  text-align: center;
  font-style: italic;
}
.game-info { flex: 1; min-width: 0; }
.game-info h4 { font-size: 16px; font-weight: 600; margin-bottom: 4px; }
.game-info .game-meta { font-size: 13px; color: var(--text-muted); display: flex; gap: 12px; flex-wrap: wrap; }
.game-rate {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--accent);
  font-weight: 700;
  font-size: 15px;
}
.game-rate svg { width: 14px; height: 14px; fill: currentColor; stroke: none; }
.game-type-tag {
  background: rgba(255,122,69,0.12);
  border: 1px solid rgba(255,122,69,0.25);
  color: var(--accent);
  border-radius: 999px;
  padding: 2px 12px;
  font-size: 12.5px;
  font-weight: 500;
}
.btn-download {
  background: rgba(0,229,160,0.12);
  border: 1px solid rgba(0,229,160,0.35);
  color: var(--primary);
  padding: 8px 20px;
  border-radius: var(--radius-md);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.25s, transform 0.15s, box-shadow 0.25s;
  white-space: nowrap;
}
.btn-download:hover {
  background: var(--primary);
  color: #0B0E13;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0,229,160,0.3);
}
.btn-download:active { transform: scale(0.96); }

/* ===== FAQ ===== */
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color 0.25s;
}
.faq-item:hover { border-color: var(--border-hover); }
.faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 26px;
  font-size: 15.5px;
  font-weight: 600;
  cursor: pointer;
  color: var(--text);
  background: transparent;
  transition: background 0.25s;
  user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { background: rgba(0,229,160,0.04); }
.faq-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px; height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 18px;
  font-weight: 400;
  flex-shrink: 0;
  transition: transform 0.3s, background 0.3s, color 0.3s, border-color 0.3s;
}
.faq-item details[open] .faq-icon {
  transform: rotate(45deg);
  background: var(--primary);
  border-color: var(--primary);
  color: #0B0E13;
}
.faq-item details[open] summary { color: var(--primary); }
.faq-answer {
  padding: 0 26px 22px 26px;
  color: var(--text-secondary);
  font-size: 14.5px;
  line-height: 1.85;
}

/* ===== CTA ===== */
.cta-section {
  background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
  position: relative;
  padding: 90px 0;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(11,14,19,0.88);
}
.cta-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
}
.cta-inner h2 {
  font-size: clamp(26px, 3.5vw, 38px);
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.3;
}
.cta-inner p {
  color: var(--text-secondary);
  font-size: 15.5px;
  line-height: 1.8;
  margin-bottom: 32px;
}

/* ===== Footer ===== */
.site-footer {
  background: #11161D;
  border-top: 1px solid var(--primary);
  margin-left: var(--sidebar-w);
  padding: 64px 0 24px;
}
.footer-content {
  display: grid;
  grid-template-columns: 1.3fr 2fr;
  gap: 48px;
  margin-bottom: 40px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-logo-text {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
}
.footer-brand p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 12px;
}
.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 14px;
  letter-spacing: 0.04em;
}
.footer-col a {
  display: block;
  color: var(--text-secondary);
  font-size: 13.5px;
  padding: 5px 0;
  transition: color 0.2s, transform 0.2s;
}
.footer-col a:hover {
  color: var(--primary);
  transform: translateX(3px);
}
.footer-col span {
  display: block;
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.9;
}
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  text-align: center;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
}
.footer-bottom a { color: var(--text-muted); transition: color 0.2s; }
.footer-bottom a:hover { color: var(--primary); }

/* ===== Back Home ===== */
.back-home {
  text-align: center;
  padding: 60px 0 80px;
}
.back-home .btn { margin: 0 auto; }

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .sidebar { width: var(--sidebar-w-tablet); }
  .main-content { margin-left: var(--sidebar-w-tablet); }
  .site-footer { margin-left: var(--sidebar-w-tablet); }
  .sidebar-logo { justify-content: center; padding: 20px 0 16px; }
  .logo-text { display: none; }
  .sidebar-nav { padding: 12px 10px; }
  .nav-item { justify-content: center; padding: 14px 0; }
  .nav-item .nav-icon { margin: 0; }
  .nav-label { display: none; }
  .nav-item.active::before { left: 0; top: auto; bottom: auto; width: 100%; height: 3px; border-radius: 0 0 3px 3px; }
  .sidebar-bottom { text-align: center; padding: 14px 8px; }
  .sidebar-bottom p:first-child { display: none; }
  .sidebar-bottom p { font-size: 11px; }
  .hero-float-card { right: 24px; bottom: 24px; }
  .split-row { gap: 36px; }
  .split-media img { height: 280px; }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 767px) {
  .sidebar { display: none; }
  .mobile-topbar { display: flex; }
  .main-content { margin-left: 0; }
  .site-footer { margin-left: 0; padding: 48px 0 20px; }
  .section { padding: 56px 0; }
  .section-header { margin-bottom: 32px; }
  .hero { min-height: auto; padding: 72px 0; }
  .hero h1 { font-size: 30px; }
  .hero-sub { font-size: 14.5px; }
  .hero-ctas .btn { padding: 12px 22px; font-size: 14px; }
  .hero-float-card { display: none; }
  .split-row {
    grid-template-columns: 1fr;
    gap: 24px;
    margin-bottom: 48px;
  }
  .split-media img { height: 220px; }
  .split-content h3 { font-size: 20px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px 16px; }
  .stat-item:nth-child(2)::after { display: none; }
  .cards-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .game-item { flex-wrap: wrap; gap: 12px; padding: 18px 16px; }
  .game-index { width: 28px; font-size: 16px; }
  .game-info { flex: 1 1 100%; }
  .btn-download { width: 100%; text-align: center; justify-content: center; }
  .faq-item summary { padding: 16px 18px; font-size: 14.5px; }
  .faq-answer { padding: 0 18px 18px; }
  .footer-content { grid-template-columns: 1fr; gap: 32px; }
  .footer-links { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .back-home { padding: 40px 0 56px; }
}
@media (max-width: 359px) {
  .footer-links { grid-template-columns: 1fr; }
  .container { padding-left: 16px; padding-right: 16px; }
}

/* roulang page: category2 */
:root {
  --primary: #00E5A0;
  --primary-hover: #33F0B6;
  --accent: #FF7A45;
  --bg: #0B0E13;
  --surface: #131920;
  --surface-hover: #1B242E;
  --surface-2: #151C24;
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(0, 229, 160, 0.35);
  --text: #E8ECEF;
  --text-secondary: #9AA7B4;
  --text-muted: #66737F;
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-icon: 12px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
  --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.4);
  --sidebar-w: 248px;
  --sidebar-w-tablet: 76px;
  --topbar-h: 56px;
  --section-gap: 90px;
  --section-gap-mobile: 48px;
}
*, *::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", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, textarea { font-family: inherit; font-size: inherit; color: inherit; }

a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(0, 229, 160, 0.15);
}

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

/* Sidebar */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-w);
  background: #11161D;
  border-right: 1px solid var(--border);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  padding: 28px 16px 20px;
  overflow-y: auto;
}
.sidebar .logo-area {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 8px 24px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}
.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), #00B37E);
  color: #08131B;
  font-size: 22px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
  letter-spacing: 0.02em;
  line-height: 1.3;
}
.sidebar-nav { display: flex; flex-direction: column; gap: 2px; flex: 1; }
.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 10px;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  position: relative;
  transition: background 0.2s ease, color 0.2s ease;
  border-left: 3px solid transparent;
}
.nav-item .nav-icon {
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.nav-item .nav-icon svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.nav-item:hover {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}
.nav-item:active { transform: scale(0.98); }
.nav-item.active {
  background: rgba(0, 229, 160, 0.08);
  color: var(--primary);
  border-left-color: var(--primary);
}
.sidebar-bottom {
  padding: 16px 8px 8px;
  border-top: 1px solid var(--border);
  margin-top: 20px;
}
.sidebar-bottom p {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Topbar mobile */
.topbar {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--topbar-h);
  background: #11161D;
  border-bottom: 1px solid var(--border);
  z-index: 1100;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
}
.topbar .logo-area {
  display: flex;
  align-items: center;
  gap: 10px;
}
.topbar .logo-icon { width: 34px; height: 34px; font-size: 18px; }
.topbar .logo-text { font-size: 15px; }
.hamburger {
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text);
}
.hamburger:hover { border-color: var(--border-hover); color: var(--primary); }
.hamburger svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }
.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 1050;
}
body.nav-open { overflow: hidden; }
body.nav-open .sidebar { transform: translateX(0); }
body.nav-open .sidebar-overlay { display: block; }

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.25s ease;
  line-height: 1.4;
}
.btn-primary { background: var(--primary); color: #08131B; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(0, 229, 160, 0.3); }
.btn-primary:active { transform: translateY(0); }
.btn-outline { background: transparent; color: var(--text); border-color: rgba(255, 255, 255, 0.45); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }
.btn-outline:active { transform: translateY(0); }
.btn-orange { background: var(--accent); color: #1A0D06; border-color: var(--accent); }
.btn-orange:hover { background: #FF8E62; border-color: #FF8E62; transform: translateY(-2px); box-shadow: 0 8px 28px rgba(255, 122, 69, 0.3); }

/* Page Hero */
.page-hero {
  position: relative;
  padding: 96px 0 80px;
  background: linear-gradient(rgba(11, 14, 19, 0.88), rgba(11, 14, 19, 0.45)), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  border-bottom: 1px solid var(--border);
}
.page-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}
.hero-content { position: relative; z-index: 2; max-width: 760px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(0, 229, 160, 0.12);
  border: 1px solid rgba(0, 229, 160, 0.3);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.page-hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 0.01em;
  margin-bottom: 18px;
}
.page-hero h1 .highlight { color: var(--primary); }
.hero-sub {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 620px;
  margin-bottom: 32px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-float-card {
  position: absolute;
  right: 0;
  bottom: 0;
  background: rgba(19, 25, 32, 0.92);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 20px 24px;
  backdrop-filter: blur(8px);
  z-index: 3;
  max-width: 220px;
  box-shadow: var(--shadow);
}
.hero-float-card .float-num { font-size: 32px; font-weight: 800; color: var(--primary); line-height: 1.1; }
.hero-float-card .float-label { font-size: 13px; color: var(--text-secondary); margin-top: 4px; }

/* Section spacing */
.section { padding: var(--section-gap) 0; }
.section-alt { background: var(--surface-2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 40px; gap: 24px; }
.section-title-wrap { display: flex; align-items: center; gap: 14px; }
.section-title-bar { width: 4px; height: 28px; background: var(--primary); border-radius: 4px; }
.section-title { font-size: clamp(24px, 3vw, 34px); font-weight: 700; line-height: 1.3; }
.section-desc { color: var(--text-secondary); font-size: 15px; max-width: 640px; margin-top: 8px; }
.section-link { color: var(--primary); font-size: 14px; font-weight: 600; white-space: nowrap; display: inline-flex; align-items: center; gap: 6px; }
.section-link:hover { color: var(--primary-hover); }

/* Intro split */
.intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.intro-media { border-radius: var(--radius-card); overflow: hidden; background: var(--surface); box-shadow: var(--shadow); }
.intro-media img { width: 100%; height: 320px; object-fit: cover; }
.intro-media.v2 img { height: 300px; }
.intro-content h3 { font-size: 24px; font-weight: 700; margin-bottom: 16px; line-height: 1.4; }
.intro-content p { color: var(--text-secondary); font-size: 15px; line-height: 1.8; margin-bottom: 16px; }
.intro-list { list-style: none; margin-top: 12px; }
.intro-list li { position: relative; padding-left: 28px; color: var(--text); font-size: 15px; margin-bottom: 10px; }
.intro-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: rgba(0, 229, 160, 0.15);
  border: 2px solid var(--primary);
}

/* Feature cards */
.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: all 0.3s ease;
  box-shadow: var(--shadow);
}
.feature-card:hover { transform: translateY(-4px); border-color: var(--border-hover); box-shadow: var(--shadow-hover); }
.feature-card .card-media { height: 180px; overflow: hidden; }
.feature-card .card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.feature-card:hover .card-media img { transform: scale(1.02); }
.feature-card .card-body { padding: 24px 24px 26px; }
.feature-card .card-tag { display: inline-block; background: rgba(255, 122, 69, 0.14); color: var(--accent); font-size: 12px; font-weight: 600; padding: 3px 12px; border-radius: 999px; margin-bottom: 12px; }
.feature-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* Stats */
.stats-panel { background: #0D1118; border: 1px solid var(--border); border-radius: var(--radius-card); padding: 48px 24px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-item { text-align: center; position: relative; padding: 12px 8px; }
.stat-item:not(:last-child)::after { content: ''; position: absolute; right: 0; top: 20%; bottom: 20%; border-right: 1px dashed rgba(255, 255, 255, 0.12); }
.stat-num { font-size: clamp(32px, 4vw, 48px); font-weight: 800; line-height: 1.1; color: var(--text); }
.stat-num em { font-style: normal; color: var(--primary); }
.stat-label { font-size: 13px; color: var(--text-secondary); margin-top: 8px; }

/* Scenario */
.scenario-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.scenario-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 32px 28px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}
.scenario-card::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 3px; background: var(--primary); opacity: 0; transition: opacity 0.3s ease; }
.scenario-card:hover { transform: translateY(-4px); border-color: var(--border-hover); box-shadow: var(--shadow-hover); }
.scenario-card:hover::before { opacity: 1; }
.scenario-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-icon);
  background: rgba(0, 229, 160, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  color: var(--primary);
}
.scenario-icon svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.scenario-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.scenario-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* Process */
.process-list { display: flex; flex-direction: column; gap: 0; }
.process-item {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  transition: background 0.3s ease;
  position: relative;
}
.process-item:first-child { border-top: 1px solid var(--border); }
.process-item:hover { background: rgba(255, 255, 255, 0.02); }
.process-item:hover .process-num { color: var(--accent); }
.process-step {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-icon);
  background: rgba(0, 229, 160, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 1px solid rgba(0, 229, 160, 0.15);
}
.process-step svg { width: 24px; height: 24px; fill: none; stroke: var(--primary); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.process-num { font-size: 28px; font-weight: 800; color: var(--primary); min-width: 48px; text-align: center; transition: color 0.3s ease; }
.process-info { flex: 1; }
.process-info h3 { font-size: 17px; font-weight: 600; margin-bottom: 4px; }
.process-info p { font-size: 14px; color: var(--text-secondary); margin: 0; }

/* Latest list */
.news-list { display: flex; flex-direction: column; }
.news-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px 16px;
  border-bottom: 1px solid var(--border);
  transition: background 0.25s ease;
  border-radius: 12px;
}
.news-item:first-child { border-top: 1px solid var(--border); }
.news-item:hover { background: rgba(255, 255, 255, 0.03); }
.news-item:hover .news-arrow { color: var(--primary); transform: translateX(4px); }
.news-tag { display: inline-block; background: rgba(255, 122, 69, 0.14); color: var(--accent); font-size: 12px; font-weight: 600; padding: 3px 12px; border-radius: 999px; white-space: nowrap; flex-shrink: 0; }
.news-main { flex: 1; min-width: 0; }
.news-main h3 { font-size: 16px; font-weight: 600; margin-bottom: 4px; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.news-main p { font-size: 13.5px; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.news-meta-right { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }
.news-date { font-size: 13px; color: var(--text-muted); }
.news-arrow { color: var(--text-muted); transition: all 0.25s ease; display: flex; }
.news-arrow svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* FAQ */
.faq-list { max-width: 860px; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius-card); background: var(--surface); margin-bottom: 14px; overflow: hidden; transition: border-color 0.3s ease; }
.faq-item:hover { border-color: rgba(0, 229, 160, 0.25); }
.faq-item[open] { border-color: var(--border-hover); }
.faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  transition: color 0.25s ease;
  user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--primary); }
.faq-icon { width: 24px; height: 24px; border-radius: 50%; background: rgba(0, 229, 160, 0.1); display: flex; align-items: center; justify-content: center; flex-shrink: 0; color: var(--primary); transition: transform 0.3s ease; }
.faq-icon svg { width: 14px; height: 14px; fill: none; stroke: currentColor; stroke-width: 2.4; stroke-linecap: round; }
.faq-item[open] .faq-icon { transform: rotate(45deg); }
.faq-answer { padding: 0 24px 20px; color: var(--text-secondary); font-size: 14.5px; line-height: 1.8; border-left: 2px solid rgba(0, 229, 160, 0.35); margin: 0 24px 0 24px; padding-left: 16px; }

/* CTA */
.cta-section {
  position: relative;
  padding: 90px 0;
  background: linear-gradient(rgba(11, 14, 19, 0.85), rgba(11, 14, 19, 0.6)), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  text-align: center;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.cta-section h2 { font-size: clamp(26px, 4vw, 40px); font-weight: 800; margin-bottom: 14px; }
.cta-section h2 .highlight { color: var(--primary); }
.cta-section p { color: var(--text-secondary); font-size: 16px; max-width: 560px; margin: 0 auto 32px; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.contact-info h3 { font-size: 22px; font-weight: 700; margin-bottom: 16px; }
.contact-info p { color: var(--text-secondary); font-size: 15px; margin-bottom: 12px; }
.contact-info .info-item { display: flex; gap: 12px; align-items: flex-start; margin-bottom: 16px; }
.contact-info .info-icon { width: 40px; height: 40px; border-radius: 10px; background: rgba(0, 229, 160, 0.08); border: 1px solid rgba(0, 229, 160, 0.15); display: flex; align-items: center; justify-content: center; color: var(--primary); flex-shrink: 0; }
.contact-info .info-icon svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.contact-form { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-card); padding: 32px; }
.contact-form .form-group { margin-bottom: 18px; }
.contact-form label { display: block; font-size: 14px; font-weight: 600; color: var(--text); margin-bottom: 8px; }
.contact-form input, .contact-form textarea {
  width: 100%;
  background: #0F151C;
  border: 1px solid var(--border);
  border-radius: var(--radius-btn);
  padding: 12px 14px;
  color: var(--text);
  font-size: 14.5px;
  transition: all 0.25s ease;
}
.contact-form input:hover, .contact-form textarea:hover { border-color: rgba(255,255,255,0.14); }
.contact-form input:focus, .contact-form textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0, 229, 160, 0.15); outline: none; }
.contact-form textarea { resize: vertical; min-height: 120px; }

/* Footer */
.site-footer {
  background: #11161D;
  border-top: 1px solid var(--primary);
  padding: 56px 0 24px;
  margin-top: auto;
}
.footer-content { display: grid; grid-template-columns: 1.2fr 2fr; gap: 48px; margin-bottom: 40px; }
.footer-brand .footer-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.footer-brand .logo-icon { width: 38px; height: 38px; font-size: 20px; }
.footer-logo-text { font-size: 18px; font-weight: 700; color: var(--text); }
.footer-brand p { font-size: 14px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 10px; max-width: 360px; }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.footer-col h4 { font-size: 15px; font-weight: 600; color: var(--text); margin-bottom: 14px; }
.footer-col a { display: block; font-size: 14px; color: var(--text-secondary); line-height: 2; transition: color 0.2s ease; }
.footer-col a:hover { color: var(--primary); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 20px; text-align: center; }
.footer-bottom p { font-size: 13px; color: var(--text-muted); }
.footer-bottom a { color: var(--text-muted); transition: color 0.2s ease; }
.footer-bottom a:hover { color: var(--primary); }

/* Back home */
.back-home { text-align: center; padding: 32px 0 0; }
.back-home .btn { margin-top: 8px; }

/* Responsive */
@media (max-width: 1023px) {
  .sidebar { width: var(--sidebar-w-tablet); padding: 20px 10px; align-items: center; }
  .sidebar .logo-area { flex-direction: column; padding: 0 0 18px; gap: 6px; text-align: center; }
  .sidebar .logo-text { display: none; }
  .sidebar-nav { width: 100%; align-items: center; }
  .nav-item { justify-content: center; padding: 12px 0; width: 100%; }
  .nav-item .nav-label { display: none; }
  .nav-item:hover .nav-label {
    display: block;
    position: absolute;
    left: 55px;
    background: var(--surface-hover);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 6px 12px;
    font-size: 13px;
    color: var(--text);
    white-space: nowrap;
    z-index: 1200;
    box-shadow: var(--shadow);
  }
  .sidebar-bottom p { display: none; }
  .main-wrapper { margin-left: var(--sidebar-w-tablet); }
  .intro-grid { gap: 40px; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 767px) {
  .sidebar { transform: translateX(-100%); transition: transform 0.3s ease; width: 280px; align-items: stretch; padding: 24px 16px; }
  .sidebar .logo-area { flex-direction: row; padding: 0 8px 20px; text-align: left; }
  .sidebar .logo-text { display: block; }
  .sidebar-nav { align-items: stretch; }
  .nav-item { justify-content: flex-start; padding: 14px; }
  .nav-item .nav-label { display: block; }
  .nav-item:hover .nav-label { position: static; background: transparent; border: none; padding: 0; box-shadow: none; display: block; }
  .sidebar-bottom p { display: block; }
  .topbar { display: flex; }
  .main-wrapper { margin-left: 0; }
  .page-hero { padding: 100px 0 56px; }
  .hero-float-card { display: none; }
  .section { padding: var(--section-gap-mobile) 0; }
  .intro-grid { grid-template-columns: 1fr; gap: 32px; }
  .feature-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 2fr 2fr; gap: 20px 12px; }
  .stat-item:not(:last-child)::after { display: none; }
  .stat-item:nth-child(2)::after { display: block; right: -6px; }
  .scenario-grid { grid-template-columns: 1fr; }
  .footer-content { grid-template-columns: 1fr; gap: 32px; }
  .footer-links { grid-template-columns: 1fr 1fr; gap: 24px; }
  .contact-grid { grid-template-columns: 1fr; }
  .process-item { flex-wrap: wrap; gap: 12px; }
  .process-num { display: none; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 12px; }
  .news-item { flex-wrap: wrap; gap: 12px; }
  .news-meta-right { width: 100%; justify-content: space-between; }
  .hero-actions .btn { width: 100%; }
  .cta-actions .btn { width: 100%; }
  .faq-item summary { padding: 16px 18px; font-size: 15px; }
  .faq-answer { padding: 0 18px 18px; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .footer-links { grid-template-columns: 1fr; gap: 20px; }
  .contact-form { padding: 20px; }
  .feature-card .card-body { padding: 18px; }
  .scenario-card { padding: 24px 18px; }
}

/* roulang page: category3 */
:root {
  --bg: #0B0E13;
  --surface: #131920;
  --surface-2: #151C24;
  --surface-hover: #1B242E;
  --brand: #00E5A0;
  --brand-light: #33F0B6;
  --accent: #FF7A45;
  --text: #E8ECEF;
  --text-2: #9AA7B4;
  --text-3: #66737F;
  --border: rgba(255,255,255,0.08);
  --border-brand: rgba(0,229,160,0.35);
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 24px rgba(0,0,0,0.25);
  --shadow-hover: 0 8px 32px rgba(0,0,0,0.4);
  --font: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, textarea, select { font: inherit; color: inherit; }
button { background: none; border: none; cursor: pointer; }
ul, ol { list-style: none; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.app-shell { display: flex; min-height: 100vh; }

/* 侧边栏 */
.sidebar {
  width: 248px;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  background: #11161D;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 100;
}
.sidebar-header { padding: 24px 20px; border-bottom: 1px solid var(--border); }
.logo-link { display: flex; align-items: center; gap: 10px; }
.logo-icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, #00E5A0, #00B376);
  color: #0B0E13;
  font-weight: 800; font-size: 20px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.logo-text { font-size: 16px; font-weight: 700; white-space: nowrap; }
.sidebar-nav { flex: 1; overflow-y: auto; padding: 14px 0; }
.nav-item {
  position: relative;
  display: flex; align-items: center; gap: 12px;
  padding: 13px 20px;
  color: var(--text-2);
  font-size: 14.5px;
  border-left: 3px solid transparent;
  transition: background .25s, color .25s;
}
.nav-item .nav-icon { width: 22px; height: 22px; flex-shrink: 0; }
.nav-item svg { width: 100%; height: 100%; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.nav-item:hover { background: rgba(255,255,255,0.04); color: var(--text); }
.nav-item.active { background: rgba(0,229,160,0.08); color: var(--brand); border-left-color: var(--brand); }
.sidebar-footer { padding: 16px 20px; border-top: 1px solid var(--border); font-size: 12px; color: var(--text-3); line-height: 1.6; }

/* 主内容 */
.main { flex: 1; margin-left: 248px; min-width: 0; display: flex; flex-direction: column; }

/* 移动端顶栏 */
.mobile-header {
  display: none;
  position: fixed; top: 0; left: 0; right: 0;
  height: 56px;
  background: #11161D;
  border-bottom: 1px solid var(--border);
  z-index: 200;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
}
.mobile-logo { display: flex; align-items: center; gap: 8px; font-size: 15px; font-weight: 700; white-space: nowrap; }
.mobile-logo .logo-icon { width: 28px; height: 28px; font-size: 14px; border-radius: 8px; }
.hamburger {
  margin-left: auto;
  width: 40px; height: 40px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: border-color .25s;
}
.hamburger:hover { border-color: var(--border-brand); }
.hamburger svg { width: 20px; height: 20px; stroke: var(--text); fill: none; stroke-width: 2; stroke-linecap: round; }
.mobile-menu {
  display: none;
  position: fixed; top: 56px; left: 0; right: 0; bottom: 0;
  background: #11161D;
  padding: 20px 16px;
  z-index: 199;
  overflow-y: auto;
}
.mobile-menu.open { display: block; }
.mobile-menu .nav-item { padding: 14px 12px; font-size: 16px; }
.mobile-menu .nav-item + .nav-item { margin-top: 4px; }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 15px; font-weight: 700;
  transition: all .25s;
  cursor: pointer;
}
.btn-primary { background: var(--brand); color: #0B0E13; }
.btn-primary:hover { background: var(--brand-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,229,160,0.3); }
.btn-outline { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,0.6); }
.btn-outline:hover { border-color: var(--brand); color: var(--brand); transform: translateY(-2px); }
.btn-accent { background: var(--accent); color: #0B0E13; }
.btn-accent:hover { filter: brightness(1.1); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,122,69,0.3); }
a.btn:focus-visible, button.btn:focus-visible, .hamburger:focus-visible, .faq-q:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(0,229,160,0.15);
}

/* Hero */
.hero {
  position: relative;
  padding: 90px 0 84px;
  background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(11,14,19,0.92) 30%, rgba(11,14,19,0.55) 100%);
}
.hero-inner { position: relative; z-index: 1; max-width: 700px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(0,229,160,0.12);
  border: 1px solid rgba(0,229,160,0.35);
  color: var(--brand);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 600;
}
.hero-title { font-size: clamp(32px, 5vw, 52px); font-weight: 800; line-height: 1.25; margin: 20px 0 14px; }
.hero-title .highlight { color: var(--brand); }
.hero-sub { font-size: 16px; color: var(--text-2); max-width: 600px; }
.hero-actions { display: flex; gap: 14px; margin-top: 28px; flex-wrap: wrap; }
.hero-stat {
  margin-top: 42px;
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 18px;
  background: rgba(11,14,19,0.8);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 13.5px;
  color: var(--text-2);
}
.hero-stat strong { color: var(--brand); font-size: 20px; margin-right: 2px; }
.hero-stat .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--brand); animation: pulse 1.6s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }

/* Section */
.section { padding: 80px 0; }
.section-head { margin-bottom: 40px; display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.section-title { font-size: clamp(24px, 3vw, 34px); font-weight: 700; line-height: 1.3; padding-left: 16px; border-left: 4px solid var(--brand); }
.section-title span { color: var(--brand); }
.section-desc { color: var(--text-2); font-size: 14.5px; max-width: 520px; }

/* 图文介绍 */
.intro-row { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.intro-row + .intro-row { margin-top: 72px; }
.intro-row.reverse .intro-media { order: 2; }
.intro-media { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); box-shadow: var(--shadow); }
.intro-media img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4/3; transition: transform .5s; }
.intro-media:hover img { transform: scale(1.03); }
.intro-content h3 { font-size: 24px; font-weight: 700; margin-bottom: 12px; }
.intro-content p { color: var(--text-2); font-size: 15px; line-height: 1.85; }
.intro-list { margin-top: 16px; }
.intro-list li { position: relative; padding-left: 22px; color: var(--text-2); font-size: 14.5px; margin-bottom: 8px; }
.intro-list li::before { content: ''; position: absolute; left: 0; top: 9px; width: 8px; height: 8px; border-radius: 2px; background: var(--brand); }

/* 模块卡片 */
.module-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.module-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  overflow: hidden;
  transition: all .3s;
}
.module-card::before {
  content: attr(data-index);
  position: absolute; right: 20px; top: 12px;
  font-size: 46px; font-weight: 800;
  color: rgba(255,255,255,0.04);
  line-height: 1;
}
.module-card:hover {
  background: var(--surface-hover);
  border-color: var(--border-brand);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.module-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: rgba(0,229,160,0.1);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.module-icon svg { width: 24px; height: 24px; fill: none; stroke: var(--brand); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.module-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.module-card p { font-size: 13.5px; color: var(--text-2); }

/* 流程 */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.step-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 24px;
  display: flex; gap: 16px;
  transition: border-color .3s, transform .3s;
}
.step-item:hover { border-color: var(--border-brand); transform: translateY(-3px); }
.step-num { font-size: 34px; font-weight: 800; color: var(--brand); line-height: 1; flex-shrink: 0; }
.step-body h4 { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
.step-body p { font-size: 13.5px; color: var(--text-2); }

/* 热门列表 */
.hot-list { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.hot-item { display: flex; align-items: center; gap: 16px; padding: 18px 20px; transition: background .25s; }
.hot-item + .hot-item { border-top: 1px solid var(--border); }
.hot-item:hover { background: var(--surface-hover); }
.hot-rank { font-size: 22px; font-weight: 800; color: var(--accent); width: 40px; text-align: center; flex-shrink: 0; }
.hot-info { flex: 1; min-width: 0; }
.hot-tag { display: inline-block; font-size: 11px; color: var(--accent); border: 1px solid rgba(255,122,69,0.4); border-radius: 999px; padding: 2px 9px; margin-bottom: 4px; }
.hot-title { font-size: 15px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hot-meta { font-size: 12.5px; color: var(--text-3); margin-top: 2px; }
.hot-arrow { color: var(--text-3); flex-shrink: 0; transition: color .2s, transform .2s; }
.hot-item:hover .hot-arrow { color: var(--brand); transform: translateX(4px); }

/* FAQ */
.faq-list { max-width: 820px; }
.faq-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 12px; overflow: hidden; transition: border-color .3s; }
.faq-item:hover { border-color: var(--border-brand); }
.faq-q {
  width: 100%;
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  padding: 18px 20px;
  font-size: 15.5px; font-weight: 600;
  text-align: left;
  cursor: pointer;
  color: var(--text);
  background: transparent;
  border: none;
  transition: color .25s;
}
.faq-q:hover { color: var(--brand); }
.faq-icon {
  flex-shrink: 0;
  width: 26px; height: 26px;
  border-radius: 8px;
  background: rgba(255,255,255,0.06);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 700;
  transition: transform .3s, background .3s, color .3s;
}
.faq-item.open .faq-icon { transform: rotate(45deg); background: rgba(0,229,160,0.15); color: var(--brand); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-a-inner {
  padding: 0 20px 18px;
  margin-left: 20px;
  padding-left: 16px;
  border-left: 2px solid var(--brand);
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.8;
}

/* CTA */
.cta-section { padding: 0 0 80px; }
.cta-box {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 52px 48px;
  text-align: center;
  overflow: hidden;
}
.cta-box::before {
  content: '';
  position: absolute; top: -50px; right: -50px;
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(0,229,160,0.13), transparent 70%);
}
.cta-box::after {
  content: '';
  position: absolute; bottom: -60px; left: -40px;
  width: 180px; height: 180px;
  background: radial-gradient(circle, rgba(255,122,69,0.1), transparent 70%);
}
.cta-box h2 { position: relative; z-index: 1; font-size: 27px; font-weight: 800; }
.cta-box p { position: relative; z-index: 1; color: var(--text-2); margin: 10px 0 26px; }
.cta-box .btn { position: relative; z-index: 1; }

/* 页脚 */
.site-footer { background: #11161D; border-top: 1px solid var(--border); padding: 56px 0 0; }
.footer-content { display: grid; grid-template-columns: 1.2fr 2fr; gap: 48px; padding-bottom: 40px; }
.footer-brand .footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.footer-logo .logo-icon { width: 36px; height: 36px; font-size: 18px; }
.footer-logo-text { font-size: 17px; font-weight: 700; white-space: nowrap; }
.footer-brand p { color: var(--text-2); font-size: 14px; line-height: 1.8; }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.footer-col h4 { font-size: 14px; font-weight: 700; margin-bottom: 12px; color: var(--text); }
.footer-col a { display: block; color: var(--text-2); font-size: 13.5px; padding: 4px 0; transition: color .2s, padding-left .2s; }
.footer-col a:hover { color: var(--brand); padding-left: 4px; }
.footer-bottom { border-top: 1px solid var(--border); padding: 18px 0; text-align: center; font-size: 13px; color: var(--text-3); }
.footer-bottom a { color: var(--text-3); transition: color .2s; }
.footer-bottom a:hover { color: var(--brand); }

/* 响应式 */
@media (max-width: 1023px) {
  .sidebar { width: 76px; }
  .main { margin-left: 76px; }
  .sidebar-header { padding: 20px 0; text-align: center; }
  .sidebar-header .logo-link { justify-content: center; }
  .logo-text, .nav-label, .sidebar-footer { display: none; }
  .nav-item { justify-content: center; padding: 14px 0; }
  .nav-item .nav-icon { width: 24px; height: 24px; }
  .nav-item:hover .nav-label {
    display: block;
    position: absolute; left: 76px; top: 50%;
    transform: translateY(-50%);
    background: var(--surface-hover);
    color: var(--text);
    padding: 6px 14px;
    border-radius: 8px;
    white-space: nowrap;
    font-size: 13.5px;
    z-index: 999;
    box-shadow: var(--shadow);
  }
  .module-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr 1fr; }
  .section { padding: 60px 0; }
  .intro-row { gap: 36px; }
}
@media (max-width: 767px) {
  .sidebar { display: none; }
  .main { margin-left: 0; padding-top: 56px; }
  .mobile-header { display: flex; }
  .section { padding: 48px 0; }
  .hero { padding: 56px 0 48px; }
  .hero-title { font-size: clamp(26px, 6vw, 34px); }
  .hero-sub { font-size: 14.5px; }
  .hero-actions .btn { width: 100%; }
  .hero-stat { width: 100%; justify-content: center; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 8px; }
  .section-title { font-size: 22px; }
  .intro-row { grid-template-columns: 1fr; gap: 24px; }
  .intro-row.reverse .intro-media { order: 0; }
  .intro-content h3 { font-size: 20px; }
  .module-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .hot-item { padding: 14px 12px; gap: 12px; }
  .hot-rank { font-size: 18px; width: 30px; }
  .hot-arrow { display: none; }
  .cta-box { padding: 36px 24px; }
  .cta-box h2 { font-size: 22px; }
  .footer-content { grid-template-columns: 1fr; gap: 32px; }
  .footer-links { grid-template-columns: 1fr 1fr; gap: 20px; }
  .footer-bottom p { font-size: 12px; }
}