/* roulang page: index */
:root {
  --c-bg: #0B0E19;
  --c-surface-1: #141824;
  --c-surface-2: #1C2130;
  --c-primary: #7058FF;
  --c-primary-light: #8A76FF;
  --c-accent: #27E0AE;
  --c-amber: #FFB547;
  --c-text: #F2F4FA;
  --c-text-secondary: #B0B7C7;
  --c-text-muted: #7E879E;
  --c-border: rgba(255,255,255,0.08);
  --sidebar-w: 250px;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 16px rgba(0,0,0,.18);
  --shadow-lg: 0 10px 28px rgba(0,0,0,.28);
  --transition: .2s ease;
  --font: "PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--c-primary-light);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--c-primary-light);
  text-decoration: none;
}

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

h1, h2, h3, h4, h5, h6 {
  color: var(--c-text);
  line-height: 1.35;
  margin: 0 0 .5em;
}

p {
  margin: 0 0 1rem;
}

button {
  font-family: var(--font);
}

.page-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

.main-shell {
  margin-left: var(--sidebar-w);
  min-height: 100vh;
  background:
    radial-gradient(circle at 92% 8%, rgba(112,88,255,.08), transparent 26%),
    radial-gradient(circle at 10% 82%, rgba(39,224,174,.04), transparent 28%),
    var(--c-bg);
}

/* 桌面侧栏 */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--sidebar-w);
  background: var(--c-surface-1);
  border-right: 1px solid rgba(255,255,255,.06);
  z-index: 1040;
  flex-direction: column;
  align-items: stretch;
}

.sidebar-inner {
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
  padding: 20px 14px;
  overflow-y: auto;
  height: 100%;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 4px;
  color: var(--c-text);
  border-radius: 10px;
}

.brand:hover {
  color: var(--c-text);
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--c-primary), #9570FF);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 16px;
  box-shadow: 0 6px 14px rgba(112,88,255,.24);
  flex: none;
}

.brand-name {
  font-weight: 700;
  font-size: 17px;
  line-height: 1.3;
  letter-spacing: .3px;
  white-space: nowrap;
}

.site-nav {
  margin-top: 26px;
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
}

.nav-group {
  margin: 18px 12px 6px;
  font-size: 13px;
  color: var(--c-text-muted);
  letter-spacing: .5px;
}

.nav-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  color: var(--c-text-secondary);
  font-weight: 500;
  font-size: 15px;
  transition: background var(--transition), color var(--transition);
}

.nav-item:hover {
  color: var(--c-text);
  background: rgba(255,255,255,.04);
}

.nav-item.active {
  color: var(--c-text);
  background: rgba(112,88,255,.12);
}

.nav-item.active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 20px;
  border-radius: 4px;
  background: var(--c-primary);
}

.sidebar-bottom {
  border-top: 1px solid rgba(255,255,255,.06);
  padding-top: 16px;
}

.assist-panel {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: 16px;
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}

.assist-panel strong {
  font-size: 14px;
  color: var(--c-text);
  line-height: 1.5;
}

.assist-panel span {
  font-size: 13px;
  color: var(--c-text-muted);
  line-height: 1.6;
}

.assist-panel .btn {
  margin-top: 6px;
  width: 100%;
}

/* 按钮 */
.btn {
  border-radius: var(--radius-sm);
  padding: 10px 18px;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition), color var(--transition);
  font-family: var(--font);
}

.btn-block {
  display: block;
  width: 100%;
  text-align: center;
}

.btn-lg {
  padding: 12px 26px;
  border-radius: 12px;
  font-size: 17px;
}

.btn-primary {
  background: var(--c-primary);
  border-color: var(--c-primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(112,88,255,.18);
}

.btn-primary:hover,
.btn-primary:focus {
  background: var(--c-primary-light);
  border-color: var(--c-primary-light);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(112,88,255,.34);
}

.btn-accent {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: #07130E;
  box-shadow: 0 4px 14px rgba(39,224,174,.18);
}

.btn-accent:hover,
.btn-accent:focus {
  background: #4CF0C3;
  border-color: #4CF0C3;
  color: #07130E;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(39,224,174,.3);
}

.btn-ghost {
  background: transparent;
  border: 1px solid rgba(255,255,255,.24);
  color: var(--c-text);
}

.btn-ghost:hover,
.btn-ghost:focus {
  border-color: var(--c-primary);
  color: #fff;
  transform: translateY(-2px);
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px rgba(112,88,255,.28);
}

.btn:active {
  transform: scale(.98);
}

/* 移动顶栏 */
.mobile-header {
  display: none;
}

.mobile-header-row {
  height: 64px;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 0 20px;
}

.menu-toggler {
  width: 42px;
  height: 42px;
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 0;
}

.menu-toggler span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--c-text);
  opacity: .9;
}

/* 移动抽屉 */
.offcanvas.mobile-navcanvas {
  background: #10141F;
  color: var(--c-text);
  width: 300px;
}

.offcanvas.mobile-navcanvas .offcanvas-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--c-border);
}

.offcanvas.mobile-navcanvas .offcanvas-body {
  padding: 20px;
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 24px;
}

.mobile-nav .nav-group {
  margin: 12px 12px 6px;
}

.offcanvas-note {
  font-size: 13px;
  color: var(--c-text-muted);
  line-height: 1.7;
  margin-top: 16px;
}

/* 通用区块标题 */
.section-tag {
  display: inline-block;
  padding: 5px 12px;
  background: rgba(112,88,255,.12);
  color: #A99BFF;
  font-weight: 600;
  font-size: 13px;
  border-radius: 6px;
  letter-spacing: .5px;
}

.section-head {
  max-width: 780px;
  margin-bottom: 40px;
}

.section-head h2 {
  font-size: 32px;
  line-height: 1.35;
  margin: 14px 0 10px;
  font-weight: 700;
}

.section-head p {
  color: var(--c-text-secondary);
  font-size: 16px;
  margin: 0;
  line-height: 1.8;
}

/* Hero */
.hero-sec {
  position: relative;
  padding: 104px 0 96px;
  overflow: hidden;
}

.hero-sec .page-container {
  position: relative;
  z-index: 2;
}

.hero-bg {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 46%;
  opacity: .13;
  background-size: cover;
  background-position: center;
  mix-blend-mode: screen;
  pointer-events: none;
}

.hero-stage {
  position: relative;
  border-radius: 20px;
  background: var(--c-surface-1);
  border: 1px solid var(--c-border);
  padding: 22px;
  box-shadow: var(--shadow);
}

.hero-stage::after {
  content: "";
  position: absolute;
  inset: -1px -1px auto auto;
  width: 150px;
  height: 150px;
  background: radial-gradient(circle, rgba(112,88,255,.24), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-illustration {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.06);
}

.stage-float {
  position: absolute;
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  border-radius: 14px;
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow);
}

.float-guide {
  top: -12px;
  right: 16px;
}

.float-count {
  bottom: -12px;
  left: 16px;
}

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

.float-value {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-accent);
}

.hero-badge {
  display: inline-flex;
  padding: 7px 14px;
  border: 1px solid rgba(39,224,174,.32);
  background: rgba(39,224,174,.08);
  color: var(--c-accent);
  font-size: 13px;
  font-weight: 500;
  border-radius: 999px;
  gap: 8px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-accent);
  animation: pulse 1.6s infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
    box-shadow: 0 0 0 0 rgba(39,224,174,.4);
  }
  50% {
    opacity: .7;
    box-shadow: 0 0 0 5px rgba(39,224,174,0);
  }
}

.hero-title {
  font-size: 48px;
  line-height: 1.2;
  margin: 16px 0 18px;
  font-weight: 800;
  letter-spacing: .6px;
}

.hero-lead {
  color: var(--c-text-secondary);
  max-width: 610px;
  font-size: 17px;
  line-height: 1.9;
  margin-bottom: 28px;
}

.hero-cta-group {
  row-gap: 12px;
}

.hero-note {
  color: var(--c-text-muted);
  font-size: 14px;
  margin-top: 20px;
  max-width: 520px;
  line-height: 1.7;
}

/* 痛点区 */
.pain-sec {
  background: var(--c-surface-1);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  padding: 84px 0;
}

.pain-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.pain-item {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 24px 22px;
  text-decoration: none;
  color: inherit;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.pain-item:hover {
  text-decoration: none;
  color: inherit;
  transform: translateY(-3px);
  border-color: rgba(112,88,255,.5);
  box-shadow: var(--shadow-lg);
}

.pain-index {
  flex: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(112,88,255,.14);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #A99BFF;
  font-weight: 700;
  font-size: 14px;
}

.pain-content {
  min-width: 0;
}

.pain-content h3 {
  font-size: 17px;
  line-height: 1.5;
  margin-bottom: 6px;
  font-weight: 600;
}

.pain-content p {
  margin: 0;
  color: var(--c-text-muted);
  font-size: 14px;
  line-height: 1.75;
}

.pain-action {
  display: block;
  color: var(--c-accent);
  font-size: 14px;
  margin-top: 10px;
  font-weight: 600;
}

/* 方案卡片 */
.plan-sec {
  padding: 84px 0;
}

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

.plan-card {
  position: relative;
  background: var(--c-surface-1);
  border: 1px solid var(--c-border);
  border-radius: 18px;
  padding: 28px 26px;
  overflow: hidden;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.plan-card::after {
  content: "";
  position: absolute;
  right: -70px;
  top: -70px;
  width: 150px;
  height: 150px;
  background: radial-gradient(circle, rgba(112,88,255,.18), transparent 72%);
  border-radius: 50%;
  pointer-events: none;
}

.plan-card:hover {
  transform: translateY(-4px);
  border-color: rgba(112,88,255,.42);
  box-shadow: var(--shadow-lg);
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
}

.card-index {
  color: var(--c-text-muted);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 1px;
}

.badge-plan {
  display: inline-block;
  padding: 4px 10px;
  background: rgba(255,181,71,.12);
  color: var(--c-amber);
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
}

.plan-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}

.plan-card p {
  margin-bottom: 20px;
  color: var(--c-text-secondary);
  font-size: 15px;
  line-height: 1.8;
}

.card-link {
  color: var(--c-primary-light);
  font-weight: 600;
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.card-link i {
  font-style: normal;
  transition: transform var(--transition);
}

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

/* 数据区 */
.stats-sec {
  background: var(--c-surface-1);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 48px 0;
}

.stats-container {
  max-width: 1120px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.stat-item {
  padding: 12px 28px 4px 0;
  border-right: 1px solid var(--c-border);
}

.stat-item:last-child {
  border-right: 0;
}

.stat-number {
  font-size: 38px;
  font-weight: 800;
  color: var(--c-accent);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  letter-spacing: -1px;
}

.stat-label {
  font-size: 15px;
  color: var(--c-text);
  margin-top: 8px;
  font-weight: 600;
}

.stat-desc {
  margin: 6px 0 0;
  font-size: 13px;
  color: var(--c-text-muted);
  line-height: 1.6;
}

/* 最新信息 */
.latest-sec {
  padding: 84px 0;
}

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

.news-row {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 20px 22px;
  border-radius: var(--radius);
  background: var(--c-surface-1);
  border: 1px solid var(--c-border);
  color: inherit;
  text-decoration: none;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.news-row:hover {
  transform: translateY(-2px);
  border-color: rgba(112,88,255,.45);
  box-shadow: var(--shadow);
  color: inherit;
  text-decoration: none;
}

.news-date {
  flex: none;
  width: 92px;
  min-width: 92px;
  font-size: 13px;
  color: var(--c-text-muted);
  font-variant-numeric: tabular-nums;
}

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

.news-meta {
  margin-bottom: 4px;
}

.news-meta .badge {
  background: rgba(255,181,71,.14);
  color: var(--c-amber);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 600;
}

.news-title {
  margin: 0 0 4px;
  font-size: 17px;
  line-height: 1.5;
  color: var(--c-text);
  font-weight: 600;
}

.news-summary {
  margin: 0;
  color: var(--c-text-secondary);
  font-size: 14px;
  line-height: 1.7;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
}

.news-arrow {
  color: var(--c-primary-light);
  font-size: 20px;
  flex: none;
  transition: transform var(--transition), color var(--transition);
}

.news-row:hover .news-arrow {
  transform: translateX(4px);
  color: var(--c-accent);
}

.empty-tip {
  border: 1px dashed var(--c-border);
  background: var(--c-surface-1);
  border-radius: var(--radius);
  padding: 36px 20px;
  color: var(--c-text-muted);
  text-align: center;
  font-size: 15px;
}

/* 分类图卡 */
.guide-sec {
  padding: 84px 0;
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.guide-card {
  display: block;
  background: var(--c-surface-1);
  border: 1px solid var(--c-border);
  border-radius: 18px;
  overflow: hidden;
  color: inherit;
  text-decoration: none;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.guide-card:hover {
  transform: translateY(-4px);
  border-color: rgba(112,88,255,.42);
  box-shadow: var(--shadow-lg);
  color: inherit;
  text-decoration: none;
}

.guide-thumb {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--c-surface-2);
}

.guide-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}

.guide-card:hover .guide-thumb img {
  transform: scale(1.05);
}

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

.guide-label {
  font-size: 12px;
  color: #A99BFF;
  letter-spacing: .4px;
  display: block;
  margin-bottom: 4px;
}

.guide-body h3 {
  margin: 4px 0 8px;
  font-size: 17px;
  font-weight: 700;
}

.guide-body p {
  font-size: 13px;
  color: var(--c-text-secondary);
  line-height: 1.75;
  margin-bottom: 12px;
}

.guide-link {
  color: var(--c-accent);
  font-size: 13px;
  font-weight: 600;
}

/* FAQ */
.faq-sec {
  padding: 84px 0;
  background: var(--c-surface-1);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
}

.faq-wrap {
  max-width: 920px;
  margin-left: auto;
  margin-right: auto;
}

.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-accordion .accordion-item {
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.faq-accordion .accordion-button {
  background: transparent;
  color: var(--c-text);
  font-size: 16px;
  font-weight: 600;
  padding: 18px 22px;
  box-shadow: none;
  line-height: 1.6;
}

.faq-accordion .accordion-button:not(.collapsed) {
  background: rgba(112,88,255,.1);
  color: var(--c-text);
  box-shadow: none;
}

.faq-accordion .accordion-button:focus {
  box-shadow: none;
}

.faq-accordion .accordion-button::after {
  filter: brightness(0) invert(1);
  opacity: .6;
}

.faq-accordion .accordion-button:not(.collapsed)::after {
  filter: brightness(0) invert(1);
  opacity: .9;
}

.faq-accordion .accordion-body {
  color: var(--c-text-secondary);
  font-size: 15px;
  line-height: 1.85;
  padding: 0 22px 20px;
}

/* CTA */
.cta-sec {
  padding: 84px 0;
}

.cta-panel {
  position: relative;
  border-radius: 24px;
  overflow: hidden;
  padding: 48px 44px;
  background:
    radial-gradient(circle at 12% 20%, rgba(112,88,255,.3), transparent 34%),
    radial-gradient(circle at 85% 80%, rgba(39,224,174,.16), transparent 30%),
    linear-gradient(135deg, #1A1F2F, #141824);
}

.cta-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center 50%;
  opacity: .08;
  pointer-events: none;
}

.cta-panel .row {
  position: relative;
  z-index: 2;
}

.cta-panel .section-tag {
  background: rgba(39,224,174,.12);
  color: var(--c-accent);
}

.cta-panel h2 {
  font-size: 28px;
  margin: 12px 0 12px;
  font-weight: 700;
}

.cta-panel p {
  color: var(--c-text-secondary);
  font-size: 16px;
  margin: 0;
  line-height: 1.85;
  max-width: 680px;
}

.cta-mini {
  font-size: 13px;
  color: var(--c-text-muted);
  margin-top: 10px;
  text-align: center;
}

/* 页脚 */
.site-footer {
  background: #0A0D15;
  border-top: 1px solid var(--c-border);
  padding: 48px 0 20px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.7fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(255,255,255,.06);
}

.footer-brand .brand-name {
  font-size: 18px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--c-text-muted);
  line-height: 1.8;
  margin: 12px 0 0;
  max-width: 360px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 14px;
}

.footer-col a {
  display: block;
  color: var(--c-text-secondary);
  font-size: 14px;
  line-height: 2.1;
}

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

.footer-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding-top: 20px;
  font-size: 13px;
  color: var(--c-text-muted);
  text-align: center;
}

.footer-bottom p {
  margin: 0;
}

.footer-disclaimer {
  font-size: 12px;
  color: var(--c-text-muted);
  opacity: .75;
}

/* 表单与弹窗 */
.remind-dialog {
  max-width: 540px;
}

.modal-content {
  background: var(--c-surface-1);
  border: 1px solid var(--c-border);
  border-radius: 20px;
  color: var(--c-text);
  box-shadow: 0 20px 50px rgba(0,0,0,.5);
}

.modal-header {
  border-bottom: 1px solid var(--c-border);
  padding: 20px 22px;
}

.modal-title {
  font-weight: 700;
  font-size: 20px;
}

.modal-body {
  padding: 22px;
}

.modal-backdrop.show {
  opacity: .72;
}

.btn-close {
  filter: invert(1);
  opacity: .7;
}

.btn-close:focus {
  box-shadow: 0 0 0 3px rgba(112,88,255,.2);
}

.form-label {
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 6px;
  color: var(--c-text);
}

.form-control,
.form-select {
  background: var(--c-bg);
  border: 1px solid rgba(255,255,255,.12);
  color: var(--c-text);
  padding: 10px 14px;
  border-radius: 10px;
  box-shadow: none;
  font-size: 15px;
}

.form-control:focus,
.form-select:focus {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(112,88,255,.18);
  background: var(--c-bg);
  color: var(--c-text);
}

.form-control::placeholder {
  color: var(--c-text-muted);
}

.form-select option {
  background: var(--c-surface-1);
  color: var(--c-text);
}

.form-check-input {
  background-color: var(--c-bg);
  border-color: rgba(255,255,255,.2);
  margin-top: .2em;
}

.form-check-input:checked {
  background-color: var(--c-primary);
  border-color: var(--c-primary);
}

.form-check-input:focus {
  box-shadow: 0 0 0 3px rgba(112,88,255,.18);
  border-color: var(--c-primary);
}

.form-check-label {
  font-size: 14px;
  color: var(--c-text-secondary);
}

.privacy-tip {
  font-size: 12px;
  color: var(--c-text-muted);
  line-height: 1.7;
  margin: 14px 0 0;
  text-align: center;
}

.submit-tip {
  color: var(--c-accent);
  font-size: 14px;
  font-weight: 500;
  text-align: center;
  margin-top: 12px;
  margin-bottom: 0;
}

/* 响应式 */
@media (max-width: 1199.98px) {
  .hero-title {
    font-size: 42px;
  }
  .guide-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 991.98px) {
  .mobile-header {
    display: flex;
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    height: 64px;
    background: var(--c-surface-1);
    border-bottom: 1px solid var(--c-border);
    z-index: 1035;
    padding: 0 20px;
  }

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

  .sidebar {
    display: none !important;
  }

  .hero-sec {
    padding: 72px 0 64px;
  }

  .hero-lead {
    font-size: 16px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px 16px;
  }

  .stat-item {
    border-right: 0;
    padding: 0;
  }
}

@media (max-width: 767.98px) {
  .page-container {
    padding: 0 20px;
  }

  .hero-sec,
  .pain-sec,
  .plan-sec,
  .latest-sec,
  .guide-sec,
  .faq-sec,
  .cta-sec {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .hero-title {
    font-size: 32px;
  }

  .hero-badge {
    font-size: 12px;
    padding: 6px 10px;
  }

  .hero-stage {
    margin-top: 12px;
  }

  .stage-float {
    padding: 8px 10px;
  }

  .section-head {
    margin-bottom: 30px;
  }

  .section-head h2 {
    font-size: 25px;
  }

  .pain-list {
    grid-template-columns: 1fr;
  }

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

  .pain-item {
    padding: 20px 16px;
    gap: 14px;
  }

  .plan-card {
    padding: 22px 18px;
  }

  .stats-sec {
    padding: 40px 0;
  }

  .stat-number {
    font-size: 32px;
  }

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

  .cta-panel {
    padding: 34px 24px;
  }

  .cta-panel h2 {
    font-size: 23px;
  }

  .cta-panel .text-lg-end {
    text-align: center !important;
  }

  .cta-mini {
    text-align: center;
  }

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

@media (max-width: 575.98px) {
  .hero-title {
    font-size: 29px;
  }

  .hero-cta-group .btn {
    width: 100%;
  }

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

  .news-row {
    align-items: flex-start;
    gap: 14px;
    padding: 16px 14px;
  }

  .news-date {
    width: auto;
    min-width: 72px;
    font-size: 12px;
    padding-top: 4px;
  }

  .news-summary {
    display: none;
  }

  .news-title {
    font-size: 16px;
  }

  .mobile-header-row {
    padding: 0 16px;
  }

  .brand-name {
    font-size: 15px;
  }
}

/* roulang page: article */
:root {
  --bg-deep: #0B0E19;
  --bg-panel: #141824;
  --bg-card: #1C2130;
  --bg-card-soft: #1A202E;
  --primary: #7058FF;
  --primary-hover: #8875FF;
  --accent: #27E0AE;
  --accent-dark: #16B98C;
  --amber: #FFB547;
  --text-main: #F2F4FA;
  --text-sub: #B0B7C7;
  --text-dim: #7E879E;
  --border: rgba(255, 255, 255, 0.08);
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.18);
  --shadow-hover: 0 10px 28px rgba(0, 0, 0, 0.28);
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", sans-serif;
  --sidebar-width: 250px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg-deep);
  color: var(--text-main);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  color: inherit;
}

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

button,
input,
textarea {
  font-family: inherit;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-md);
  padding: 10px 20px;
  font-size: 15px;
  line-height: 1.5;
  border: 1px solid transparent;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn:focus,
.btn:active:focus {
  box-shadow: 0 0 0 0.25rem rgba(112, 88, 255, 0.4);
  outline: none;
}

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

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

.btn-primary:active {
  background: var(--primary);
  transform: translateY(0) scale(0.98);
}

.btn-accent {
  background: var(--accent);
  border-color: var(--accent);
  color: #0B0E19;
  font-weight: 600;
}

.btn-accent:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  color: #0B0E19;
  transform: translateY(-2px);
}

.btn-outline-light-custom {
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: transparent;
  color: var(--text-main);
}

.btn-outline-light-custom:hover {
  border-color: var(--primary);
  color: #fff;
  background: rgba(112, 88, 255, 0.15);
  transform: translateY(-2px);
}

.btn-lg-custom {
  padding: 13px 28px;
  font-size: 16px;
}

.site-shell {
  min-height: 100vh;
}

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

/* ========== 左侧导航 ========== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  z-index: 1045;
  display: flex;
  flex-direction: column;
  padding: 28px 20px 24px;
  overflow-y: auto;
}

.sidebar-inner {
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 110px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 0 6px 8px;
  margin-bottom: 22px;
}

.brand-mark {
  flex: 0 0 46px;
  width: 46px;
  height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: var(--primary);
  color: #fff;
  font-size: 21px;
  font-weight: 800;
  box-shadow: 0 6px 18px rgba(112, 88, 255, 0.28);
}

.brand-name {
  font-size: 16px;
  line-height: 1.4;
  font-weight: 700;
  color: var(--text-main);
}

.brand-sub {
  display: block;
  font-size: 12px;
  font-weight: 400;
  color: var(--text-dim);
  margin-top: 2px;
}

.site-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.site-nav .nav-group {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  padding: 22px 12px 8px;
  text-transform: uppercase;
}

.nav-item {
  position: relative;
  display: block;
  padding: 11px 13px;
  font-size: 15px;
  color: var(--text-sub);
  border-radius: 8px;
  transition: all 0.18s ease;
}

.nav-item:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.04);
}

.nav-item.active {
  color: #fff;
  background: linear-gradient(90deg, rgba(112, 88, 255, 0.22), rgba(112, 88, 255, 0.04));
}

.nav-item.active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 4px;
  border-radius: 0 4px 4px 0;
  background: var(--primary);
}

.sidebar-action {
  margin-top: auto;
  padding-top: 28px;
}

.sidebar-action .btn {
  width: 100%;
}

.sidebar-note {
  font-size: 12px;
  color: var(--text-dim);
  text-align: center;
  margin: 12px 0 0;
  line-height: 1.6;
}

.sidebar-footer {
  border-top: 1px solid var(--border);
  padding-top: 16px;
  margin-top: 20px;
  text-align: center;
}

.sidebar-footer a {
  font-size: 13px;
  color: var(--text-dim);
  transition: color 0.2s;
}

.sidebar-footer a:hover {
  color: var(--accent);
}

/* ========== 移动头部 ========== */
.mobile-header {
  position: sticky;
  top: 0;
  z-index: 1030;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
  height: 64px;
}

.mobile-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.mobile-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.mobile-brand .brand-mark {
  flex-basis: 38px;
  width: 38px;
  height: 38px;
  font-size: 17px;
  border-radius: 12px;
}

.mobile-brand .brand-text {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.3;
}

.mobile-nav-toggle {
  background: transparent;
  border: 1px solid var(--border);
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
}

.mobile-nav-toggle svg {
  width: 20px;
  height: 20px;
}

.mobile-nav-toggle:active {
  transform: scale(0.95);
}

.mobile-nav-canvas {
  background: var(--bg-panel);
  width: 86%;
  max-width: 400px;
  color: var(--text-main);
}

.mobile-nav-canvas .offcanvas-header {
  padding: 20px;
  border-bottom: 1px solid var(--border);
}

.mobile-nav-canvas .offcanvas-body {
  padding: 20px 20px 32px;
}

.mobile-nav-canvas .site-nav {
  padding-bottom: 24px;
}

.mobile-nav-canvas .btn {
  width: 100%;
  margin-top: 10px;
}

.offcanvas-backdrop.show {
  opacity: 0.75;
}

/* ========== 主内容区 ========== */
.main-content {
  flex: 1;
  padding: 48px 32px 64px;
}

.page-container {
  max-width: 1180px;
  margin-inline: auto;
}

/* ========== 文章卡片容器 ========== */
.article-shell {
  max-width: 1180px;
  margin-inline: auto;
}

.article-card {
  max-width: 920px;
  margin-inline: auto;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  position: relative;
}

.article-topline {
  max-width: 920px;
  margin: 0 auto 20px;
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--text-sub);
  gap: 8px;
  margin-bottom: 16px;
}

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

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

.breadcrumb-num {
  color: var(--text-dim);
  font-size: 12px;
}

.crumb-current {
  color: var(--text-main);
}

/* ========== 文章标题区 ========== */
.article-header {
  max-width: 920px;
  margin: 0 auto 28px;
}

.article-title {
  font-size: 36px;
  line-height: 1.35;
  font-weight: 800;
  color: #fff;
  margin: 0 0 20px;
  letter-spacing: 0.01em;
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px 24px;
  color: var(--text-sub);
  font-size: 14px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
}

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

.article-meta .tag-pill {
  background: rgba(255, 181, 71, 0.14);
  border: 1px solid rgba(255, 181, 71, 0.26);
  color: var(--amber);
  border-radius: 30px;
  padding: 3px 12px;
  font-size: 13px;
  line-height: 1.6;
}

.article-meta .meta-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--text-dim);
}

.article-cover-banner {
  max-width: 920px;
  margin: 0 auto 32px;
  height: 180px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background:
    linear-gradient(105deg, rgba(11, 14, 25, 0.95) 0%, rgba(11, 14, 25, 0.72) 50%, rgba(112, 88, 255, 0.35) 100%),
    url('/assets/images/coverpic/cover-6.webp') center / cover no-repeat;
  border: 1px solid var(--border);
  display: flex;
  align-items: flex-end;
  padding: 28px 32px;
}

.article-cover-banner .cover-line {
  display: block;
  width: 56px;
  height: 3px;
  border-radius: 2px;
  background: var(--accent);
  margin-bottom: 10px;
}

.article-cover-banner .cover-title {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  line-height: 1.4;
}

.article-cover-banner .cover-desc {
  font-size: 14px;
  color: var(--text-sub);
}

/* ========== 正文 ========== */
.article-rich {
  font-size: 16px;
  color: var(--text-sub);
  line-height: 1.9;
}

.article-rich p {
  margin-bottom: 1.4em;
  color: rgba(242, 244, 250, 0.88);
}

.article-rich h2 {
  font-size: 28px;
  color: #fff;
  font-weight: 800;
  margin: 0 0 18px;
  line-height: 1.4;
}

.article-rich h3 {
  font-size: 22px;
  color: #F2F4FA;
  font-weight: 700;
  margin: 1.6em 0 0.8em;
  line-height: 1.45;
}

.article-rich ul,
.article-rich ol {
  padding-left: 1.4em;
  margin-bottom: 1.4em;
}

.article-rich li {
  margin-bottom: 0.6em;
}

.article-rich a {
  color: var(--primary-hover);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s;
}

.article-rich a:hover {
  color: var(--accent);
}

.article-rich blockquote {
  margin: 1.8em 0;
  padding: 20px 24px;
  border-left: 3px solid var(--accent);
  background: rgba(39, 224, 174, 0.08);
  border-radius: 0 12px 12px 0;
  color: var(--text-sub);
  font-size: 15px;
}

.article-rich blockquote p {
  margin-bottom: 0;
}

.article-rich img {
  border-radius: var(--radius-lg);
  margin: 1.6em 0;
  border: 1px solid var(--border);
}

.article-rich table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.8em 0;
  font-size: 15px;
  background: var(--bg-card-soft);
  border-radius: 12px;
  overflow: hidden;
}

.article-rich th {
  background: #252C3D;
  color: #fff;
  font-weight: 700;
  text-align: left;
}

.article-rich th,
.article-rich td {
  padding: 12px 16px;
  border: 1px solid var(--border);
}

.article-rich tr:last-child td {
  border-bottom: 0;
}

.article-rich code {
  background: rgba(112, 88, 255, 0.18);
  padding: 2px 8px;
  border-radius: 6px;
  color: #D9D1FF;
  font-size: 0.9em;
}

.article-rich .article-empty {
  text-align: center;
  padding: 48px 20px 56px;
}

.article-empty .empty-icon {
  width: 66px;
  height: 66px;
  margin: 0 auto 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(112, 88, 255, 0.14);
  border-radius: 50%;
  color: var(--primary-hover);
  font-size: 30px;
}

.article-empty h2 {
  font-size: 26px;
  color: #fff;
  margin-bottom: 10px;
}

.article-empty p {
  color: var(--text-sub);
  max-width: 420px;
  margin: 0 auto 26px;
}

/* 文章标签 */
.article-tags-row {
  max-width: 920px;
  margin: 26px auto -4px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.tag-badge {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
  border-radius: 30px;
  padding: 6px 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-sub);
}

.tag-badge .dot {
  width: 5px;
  height: 5px;
  background: var(--accent);
  border-radius: 50%;
}

.article-disclaimer {
  max-width: 920px;
  margin: 30px auto 0;
  padding: 16px 20px;
  border-radius: 12px;
  background: rgba(255, 181, 71, 0.07);
  border: 1px solid rgba(255, 181, 71, 0.2);
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.7;
}

.article-back-link {
  margin: 44px 0 0;
  display: flex;
  justify-content: center;
}

/* ========== 延伸分类卡片 ========== */
.related-area {
  max-width: 920px;
  margin: 70px auto 0;
}

.related-title {
  font-size: 25px;
  color: #fff;
  font-weight: 800;
  margin-bottom: 6px;
  line-height: 1.4;
}

.related-subtitle {
  color: var(--text-dim);
  font-size: 14px;
  margin-bottom: 24px;
}

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

.related-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 170px;
  border-radius: var(--radius-lg);
  padding: 22px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: all 0.25s ease;
}

.related-card:hover {
  border-color: rgba(112, 88, 255, 0.55);
  background: var(--bg-card-soft);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.related-card .rc-index {
  position: absolute;
  top: 14px;
  right: 18px;
  font-size: 44px;
  font-weight: 800;
  line-height: 1;
  color: rgba(255, 255, 255, 0.06);
}

.related-card .rc-tag {
  font-size: 12px;
  color: var(--amber);
  background: rgba(255, 181, 71, 0.1);
  border: 1px solid rgba(255, 181, 71, 0.24);
  border-radius: 30px;
  width: fit-content;
  padding: 3px 10px;
  margin-bottom: 8px;
}

.related-card h3 {
  font-size: 19px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
  line-height: 1.4;
}

.related-card p {
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.75;
  margin: 0;
}

.related-card .rc-arrow {
  position: absolute;
  right: 18px;
  bottom: 16px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(112, 88, 255, 0.18);
  color: #BDB4FF;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  transition: all 0.2s;
}

.related-card:hover .rc-arrow {
  background: var(--primary);
  color: #fff;
}

/* ========== CTA ========== */
.article-cta {
  max-width: 920px;
  margin: 56px auto 10px;
  background:
    linear-gradient(110deg, rgba(112, 88, 255, 0.16) 0%, rgba(39, 224, 174, 0.06) 50%, rgba(11, 14, 25, 0.4) 100%),
    var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.article-cta-title {
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  margin: 0 0 4px;
}

.article-cta-desc {
  font-size: 14px;
  color: var(--text-sub);
  margin: 0;
}

/* ========== 页脚 ========== */
.site-footer {
  background: #090C14;
  border-top: 1px solid var(--border);
  padding: 52px 0 28px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr;
  gap: 40px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--border);
}

.footer-brand .brand {
  margin-bottom: 14px;
}

.footer-brand p {
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.8;
  margin: 0;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
  line-height: 1.4;
}

.footer-col a {
  display: block;
  color: var(--text-sub);
  font-size: 14px;
  margin-bottom: 12px;
  transition: all 0.2s;
  width: fit-content;
}

.footer-col a:hover {
  color: var(--accent);
  transform: translateX(3px);
}

.footer-bottom {
  padding-top: 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px 30px;
  flex-wrap: wrap;
}

.footer-bottom p {
  margin: 0;
  color: var(--text-dim);
  font-size: 13px;
}

.footer-bottom .footer-disclaimer {
  text-align: right;
  line-height: 1.6;
}

/* ========== 响应式 ========== */
@media (max-width: 1199.98px) {
  .page-bottom-cta {
    padding: 26px 24px;
  }
}

@media (max-width: 991.98px) {
  .sidebar {
    display: none !important;
  }

  .main-area {
    margin-left: 0;
  }

  .main-content {
    padding: 32px 20px 56px;
  }

  .article-card {
    padding: 24px 20px;
  }

  .article-title {
    font-size: 30px;
  }

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

@media (max-width: 767.98px) {
  .main-content {
    padding: 24px 16px 44px;
  }

  .article-card {
    padding: 20px 16px;
  }

  .article-title {
    font-size: 25px;
  }

  .article-cover-banner {
    height: 150px;
    padding: 20px;
  }

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

  .related-card {
    min-height: 150px;
    padding: 18px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-bottom .footer-disclaimer {
    text-align: left;
  }

  .article-cta {
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    text-align: left;
    padding: 20px;
  }

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

@media (max-width: 520px) {
  .mobile-brand .brand-text {
    font-size: 14px;
  }

  .article-meta .meta-full {
    width: 100%;
  }

  .related-title {
    font-size: 21px;
  }

  .footer-brand p {
    max-width: 100%;
  }

  .footer-col h4 {
    margin-bottom: 12px;
  }

  .footer-col a {
    margin-bottom: 10px;
  }
}

/* roulang page: category1 */
:root {
      --primary: #7058FF;
      --primary-soft: #8572FF;
      --accent: #27E0AE;
      --accent-deep: #12B98C;
      --warning: #FFB547;
      --bg: #0B0E19;
      --panel: #141824;
      --panel-2: #1C2130;
      --text: #F2F4FA;
      --muted: #B0B7C7;
      --soft: #7E879E;
      --border: rgba(255, 255, 255, 0.08);
      --radius: 16px;
      --radius-sm: 10px;
      --shadow: 0 4px 16px rgba(0, 0, 0, 0.18);
      --shadow-lg: 0 10px 28px rgba(0, 0, 0, 0.28);
      --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      background: var(--bg);
      color: var(--text);
      font-family: var(--font-main);
      font-size: 16px;
      line-height: 1.8;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, p, ul, ol, figure {
      margin: 0;
    }

    h1, h2, h3, h4 {
      color: var(--text);
      line-height: 1.3;
    }

    ul, ol {
      padding: 0;
      list-style: none;
    }

    a {
      color: var(--accent);
      text-decoration: none;
      transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
    }

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

    img {
      max-width: 100%;
      height: auto;
      border: 0;
      display: block;
    }

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

    html, body {
      overflow-x: hidden;
    }

    .page-container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding-left: 32px;
      padding-right: 32px;
    }

    .page-shell {
      min-height: 100vh;
    }

    .site-aside {
      position: fixed;
      top: 0;
      left: 0;
      bottom: 0;
      z-index: 1040;
      width: 250px;
      background: rgba(13, 16, 28, 0.97);
      border-right: 1px solid var(--border);
      display: flex;
      flex-direction: column;
      padding: 24px 18px 18px;
      overflow-y: auto;
    }

    .aside-head {
      width: 100%;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 0 4px;
    }

    .brand-mark {
      flex: 0 0 40px;
      width: 40px;
      height: 40px;
      border-radius: 12px;
      background: var(--primary);
      color: #fff;
      font-size: 19px;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      letter-spacing: -1px;
      box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.1);
    }

    .brand-name {
      color: var(--text);
      font-size: 16px;
      font-weight: 700;
      line-height: 1.35;
      letter-spacing: 0.01em;
    }

    .site-nav {
      display: flex;
      flex-direction: column;
      margin-top: 28px;
      padding-bottom: 16px;
      flex: 0 0 auto;
    }

    .nav-group {
      color: var(--soft);
      font-size: 12px;
      letter-spacing: 0.12em;
      margin: 14px 8px 8px;
      font-weight: 600;
    }

    .nav-group:first-child {
      margin-top: 0;
    }

    .nav-item {
      position: relative;
      display: block;
      padding: 10px 12px 10px 16px;
      margin: 2px 0;
      border-radius: 10px;
      color: var(--muted);
      font-size: 15px;
      line-height: 1.5;
      transition: background 0.2s ease, color 0.2s ease;
    }

    .nav-item:hover {
      color: var(--text);
      background: rgba(255, 255, 255, 0.04);
    }

    .nav-item.active {
      color: var(--text);
      font-weight: 600;
      background: rgba(112, 88, 255, 0.08);
    }

    .nav-item.active::before {
      content: "";
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%);
      width: 4px;
      height: 18px;
      border-radius: 2px;
      background: var(--primary);
    }

    .aside-helper {
      margin-top: auto;
      border: 1px solid var(--border);
      background: rgba(255, 255, 255, 0.03);
      border-radius: 16px;
      padding: 16px 14px 14px;
    }

    .aside-helper-title {
      color: var(--text);
      font-size: 15px;
      font-weight: 600;
      margin-bottom: 6px;
    }

    .aside-helper-text {
      color: var(--soft);
      font-size: 13px;
      line-height: 1.7;
      margin-bottom: 12px;
    }

    .aside-helper .btn {
      width: 100%;
    }

    .aside-toggle {
      display: none;
    }

    .content-wrap {
      margin-left: 250px;
      display: flex;
      flex-direction: column;
      min-height: 100vh;
      background:
        radial-gradient(circle at 72% 8%, rgba(112, 88, 255, 0.14), transparent 26%),
        radial-gradient(circle at 8% 46%, rgba(39, 224, 174, 0.05), transparent 20%),
        var(--bg);
    }

    .site-main {
      flex: 1;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 46px;
      padding: 0.72rem 1.4rem;
      border-radius: var(--radius-sm);
      border: 1px solid transparent;
      font-weight: 600;
      font-size: 15px;
      line-height: 1.2;
      text-decoration: none;
      color: var(--text);
      transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
      outline: none;
    }

    .btn:focus-visible {
      box-shadow: 0 0 0 3px rgba(39, 224, 174, 0.5);
    }

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

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

    .btn-main:hover {
      background: var(--primary-soft);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: var(--shadow-lg);
    }

    .btn-accent {
      background: var(--accent);
      color: #0B0E19;
    }

    .btn-accent:hover {
      background: #5af0c7;
      color: #0B0E19;
      transform: translateY(-2px);
      box-shadow: 0 6px 22px rgba(39, 224, 174, 0.32);
    }

    .btn-ghost {
      background: rgba(255, 255, 255, 0.02);
      border-color: rgba(255, 255, 255, 0.18);
      color: var(--text);
    }

    .btn-ghost:hover {
      border-color: rgba(112, 88, 255, 0.55);
      color: #fff;
      transform: translateY(-2px);
    }

    .category-hero {
      padding: 64px 0 52px;
      border-bottom: 1px solid var(--border);
      background:
        linear-gradient(120deg, rgba(11, 14, 25, 0.92) 0%, rgba(20, 24, 36, 0.88) 48%, rgba(11, 14, 25, 0.94) 100%),
        url('/assets/images/backpic/back-2.png');
      background-position: center;
      background-size: cover;
    }

    .breadcrumb-line {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: var(--soft);
      margin-bottom: 28px;
    }

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

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

    .breadcrumb-line span {
      color: var(--soft);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
      gap: 48px;
      align-items: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(112, 88, 255, 0.12);
      color: #bdb1ff;
      border: 1px solid rgba(112, 88, 255, 0.22);
      border-radius: 999px;
      padding: 6px 14px;
      font-size: 13px;
      margin-bottom: 20px;
    }

    .hero-badge .dot {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--accent);
      box-shadow: 0 0 0 4px rgba(39, 224, 174, 0.15);
    }

    .category-hero h1 {
      font-size: 48px;
      font-weight: 800;
      letter-spacing: 0.01em;
      margin-bottom: 22px;
    }

    .hero-lead {
      color: var(--muted);
      font-size: 17px;
      max-width: 620px;
      margin-bottom: 26px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      align-items: center;
      margin-bottom: 18px;
    }

    .hero-note {
      font-size: 13px;
      color: var(--soft);
    }

    .hero-figure {
      border-radius: var(--radius);
      background: rgba(20, 24, 36, 0.8);
      border: 1px solid var(--border);
      padding: 10px;
      box-shadow: var(--shadow);
    }

    .hero-figure img {
      width: 100%;
      border-radius: 12px;
    }

    .quick-nav-section {
      padding: 22px 0;
      border-bottom: 1px solid var(--border);
    }

    .quick-nav {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 10px;
    }

    .quick-nav > span {
      display: inline-flex;
      align-items: center;
      min-height: 40px;
      padding: 0 6px;
      color: var(--soft);
      font-size: 14px;
    }

    .quick-nav a {
      display: inline-flex;
      align-items: center;
      min-height: 44px;
      padding: 8px 16px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border);
      color: var(--muted);
      font-size: 14px;
    }

    .quick-nav a:hover {
      color: var(--text);
      border-color: rgba(112, 88, 255, 0.45);
      background: rgba(112, 88, 255, 0.08);
    }

    .section-block {
      padding: 72px 0;
      border-bottom: 1px solid var(--border);
    }

    .section-head {
      max-width: 820px;
      margin-bottom: 40px;
    }

    .eyebrow {
      display: inline-block;
      color: var(--accent);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.1em;
      margin-bottom: 10px;
    }

    .section-head h2 {
      font-size: 32px;
      font-weight: 700;
      margin-bottom: 12px;
    }

    .section-head p {
      color: var(--muted);
      font-size: 16px;
    }

    .scene-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 22px;
    }

    .scene-card {
      background: var(--panel-2);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 26px 26px 22px;
      box-shadow: var(--shadow);
      transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .scene-card:hover {
      transform: translateY(-3px);
      border-color: rgba(112, 88, 255, 0.34);
      box-shadow: var(--shadow-lg);
    }

    .scene-icon {
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: rgba(112, 88, 255, 0.14);
      color: #a596ff;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
    }

    .scene-card h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .scene-card p {
      color: var(--muted);
      font-size: 15px;
      line-height: 1.8;
    }

    .route-block {
      display: grid;
      grid-template-columns: minmax(0, 1fr) minmax(340px, 0.8fr);
      gap: 44px;
      align-items: center;
    }

    .route-list {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

    .route-card {
      display: flex;
      gap: 18px;
      background: rgba(255, 255, 255, 0.025);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 22px;
    }

    .route-number {
      flex: 0 0 40px;
      width: 40px;
      height: 40px;
      border-radius: 12px;
      background: var(--primary);
      color: #fff;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 17px;
    }

    .route-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .route-card p {
      color: var(--muted);
      font-size: 15px;
    }

    .route-visual {
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
    }

    .route-visual img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      min-height: 320px;
    }

    .device-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 22px;
    }

    .device-card {
      position: relative;
      background: var(--panel);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 28px 26px 24px;
      overflow: hidden;
    }

    .device-card::after {
      content: "";
      position: absolute;
      width: 120px;
      height: 120px;
      border-radius: 50%;
      background: rgba(112, 88, 255, 0.1);
      right: -30px;
      top: -30px;
      pointer-events: none;
    }

    .device-card h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 14px;
    }

    .device-card ul li {
      position: relative;
      padding-left: 22px;
      color: var(--muted);
      font-size: 15px;
      margin-bottom: 9px;
    }

    .device-card ul li::before {
      content: "";
      position: absolute;
      left: 2px;
      top: 11px;
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--accent);
    }

    .device-tip {
      margin-top: 20px;
      background: rgba(255, 181, 71, 0.08);
      border-left: 3px solid var(--warning);
      border-radius: 12px;
      padding: 16px 18px;
      color: var(--muted);
      font-size: 15px;
      line-height: 1.8;
    }

    .check-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 20px;
    }

    .check-card {
      background: var(--panel-2);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 24px;
      transition: transform 0.2s ease, border-color 0.2s ease;
    }

    .check-card:hover {
      transform: translateY(-2px);
      border-color: rgba(39, 224, 174, 0.36);
    }

    .check-tag {
      display: inline-flex;
      align-items: center;
      font-size: 12px;
      font-weight: 700;
      color: var(--warning);
      background: rgba(255, 181, 71, 0.1);
      border-radius: 6px;
      padding: 4px 9px;
      margin-bottom: 14px;
    }

    .check-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .check-card p {
      color: var(--muted);
      font-size: 15px;
      line-height: 1.8;
    }

    .faq-section {
      background: rgba(20, 24, 36, 0.28);
    }

    .faq-wrap {
      max-width: 880px;
    }

    .faq-item {
      background: var(--panel);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      margin-bottom: 12px;
      overflow: hidden;
    }

    .faq-q {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      padding: 18px 20px;
      text-align: left;
      color: var(--text);
      font-size: 17px;
      font-weight: 600;
      line-height: 1.5;
      background: transparent;
      border-radius: 0;
      transition: background 0.2s ease;
    }

    .faq-q:hover {
      background: rgba(255, 255, 255, 0.03);
    }

    .faq-q .faq-sign {
      flex: 0 0 28px;
      width: 28px;
      height: 28px;
      margin-left: 16px;
      color: var(--accent);
      position: relative;
      display: inline-block;
    }

    .faq-q .faq-sign::before,
    .faq-q .faq-sign::after {
      content: "";
      position: absolute;
      left: 50%;
      top: 50%;
      width: 14px;
      height: 2px;
      background: var(--accent);
      transform: translate(-50%, -50%);
      border-radius: 2px;
      transition: transform 0.25s ease;
    }

    .faq-q.collapsed .faq-sign::after {
      transform: translate(-50%, -50%) rotate(90deg);
    }

    .faq-a {
      padding: 0 22px 22px;
      color: var(--muted);
      font-size: 15px;
      line-height: 1.85;
    }

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

    .cta-panel {
      position: relative;
      background: var(--panel);
      border: 1px solid var(--border);
      border-radius: 22px;
      padding: 42px 44px;
      overflow: hidden;
      box-shadow: var(--shadow);
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      gap: 32px;
      align-items: center;
    }

    .cta-panel::before {
      content: "";
      position: absolute;
      width: 260px;
      height: 260px;
      border-radius: 50%;
      background: rgba(39, 224, 174, 0.1);
      left: -60px;
      top: -120px;
      pointer-events: none;
    }

    .cta-panel h2 {
      font-size: 28px;
      font-weight: 700;
      margin-bottom: 10px;
    }

    .cta-panel p {
      color: var(--muted);
      font-size: 16px;
      max-width: 640px;
      margin-bottom: 22px;
    }

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

    .site-footer {
      background: rgba(8, 10, 18, 0.96);
      border-top: 1px solid var(--border);
      padding: 48px 0 26px;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 34px;
    }

    .footer-brand .brand {
      margin-bottom: 12px;
    }

    .footer-brand p {
      color: var(--soft);
      font-size: 14px;
      max-width: 390px;
      margin-top: 12px;
    }

    .footer-col h4 {
      color: var(--text);
      font-size: 16px;
      font-weight: 600;
      margin-bottom: 14px;
    }

    .footer-col a {
      display: block;
      color: var(--soft);
      font-size: 14px;
      padding: 4px 0;
      transition: color 0.2s ease, padding-left 0.2s ease;
    }

    .footer-col a:hover {
      color: var(--accent);
      padding-left: 3px;
    }

    .footer-bottom {
      border-top: 1px solid var(--border);
      padding-top: 22px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 8px;
      color: var(--soft);
      font-size: 13px;
    }

    .footer-disclaimer {
      font-size: 12px;
      color: var(--soft);
    }

    @media (max-width: 1199.98px) {
      .page-container {
        padding-left: 28px;
        padding-right: 28px;
      }

      .hero-grid {
        gap: 30px;
      }

      .hero-figure {
        display: none;
      }

      .hero-grid {
        grid-template-columns: minmax(0, 1fr);
      }

      .cta-panel {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 991.98px) {
      .site-aside {
        top: 0;
        left: 0;
        right: 0;
        bottom: auto;
        width: 100%;
        height: 64px;
        padding: 0;
        overflow: hidden;
        transition: height 0.25s ease;
      }

      .site-aside.menu-open {
        height: 100vh;
        overflow-y: auto;
      }

      .aside-head {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 64px;
        padding: 0 20px;
        flex: 0 0 64px;
      }

      .aside-head .brand {
        padding: 0;
      }

      .site-aside .site-nav {
        display: none;
        flex: 0 0 auto;
        margin: 8px 20px 0;
        padding-bottom: 12px;
      }

      .site-aside .aside-helper {
        display: none;
        flex: 0 0 auto;
        margin: 16px 20px 26px;
      }

      .site-aside.menu-open .site-nav {
        display: flex;
      }

      .site-aside.menu-open .aside-helper {
        display: block;
      }

      .content-wrap {
        margin-left: 0;
        padding-top: 64px;
      }

      .aside-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        color: var(--text);
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid var(--border);
        border-radius: 10px;
        height: 42px;
        padding: 0 14px;
        font-size: 14px;
        transition: background 0.2s ease, border-color 0.2s ease;
      }

      .aside-toggle:hover {
        border-color: rgba(112, 88, 255, 0.36);
      }

      .aside-toggle .toggle-lines {
        display: inline-flex;
        flex-direction: column;
        gap: 4px;
        width: 17px;
      }

      .aside-toggle .toggle-lines i {
        display: block;
        height: 2px;
        background: currentColor;
        border-radius: 2px;
      }
    }

    @media (max-width: 767.98px) {
      .page-container {
        padding-left: 20px;
        padding-right: 20px;
      }

      .category-hero {
        padding: 40px 0 34px;
      }

      .category-hero h1 {
        font-size: 32px;
        line-height: 1.25;
      }

      .hero-lead {
        font-size: 15px;
      }

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

      .quick-nav {
        flex-wrap: nowrap;
        overflow-x: auto;
        padding-bottom: 8px;
        margin-bottom: -8px;
      }

      .quick-nav > span {
        display: none;
      }

      .quick-nav a {
        flex: 0 0 auto;
      }

      .section-block {
        padding: 48px 0;
      }

      .section-head h2 {
        font-size: 24px;
      }

      .scene-grid,
      .device-grid,
      .check-grid {
        grid-template-columns: 1fr;
      }

      .scene-card,
      .device-card,
      .check-card {
        padding: 22px;
      }

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

      .route-visual img {
        min-height: 210px;
      }

      .route-card {
        flex-direction: column;
        gap: 12px;
        padding: 20px;
      }

      .route-number {
        flex-basis: 38px;
        width: 38px;
        height: 38px;
      }

      .faq-wrap {
        max-width: 100%;
      }

      .faq-q {
        padding: 16px;
        font-size: 16px;
        line-height: 1.6;
      }

      .faq-a {
        padding: 0 16px 18px;
      }

      .cta-section {
        padding: 42px 0;
      }

      .cta-panel {
        padding: 28px 22px;
        border-radius: 16px;
      }

      .cta-panel h2 {
        font-size: 23px;
      }

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

      .footer-top {
        grid-template-columns: 1fr;
        gap: 26px;
      }

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

      .hero-actions .btn-ghost {
        margin-top: 0;
      }
    }

    @media (max-width: 520px) {
      .brand-name {
        font-size: 15px;
      }

      .brand-mark {
        width: 36px;
        height: 36px;
        font-size: 17px;
      }

      .category-hero h1 {
        font-size: 28px;
      }

      .section-head p {
        font-size: 15px;
      }

      .scene-card {
        padding: 20px;
      }

      .scene-card h3 {
        font-size: 18px;
      }

      .device-card h3 {
        font-size: 18px;
      }

      .footer-top .brand {
        align-items: flex-start;
      }
    }

/* roulang page: category2 */
:root {
            --bg-primary: #0B0E19;
            --bg-panel: #141824;
            --bg-panel-2: #1C2130;
            --brand: #7058FF;
            --accent: #27E0AE;
            --amber: #FFB547;
            --text-primary: #F2F4FA;
            --text-secondary: #B0B7C7;
            --text-muted: #7E879E;
            --border: rgba(255, 255, 255, 0.08);
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-badge: 6px;
            --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.18);
            --shadow-hover: 0 10px 28px rgba(0, 0, 0, 0.28);
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --space-section: 88px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.8;
            font-size: 16px;
            min-height: 100vh;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color .25s;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
        }
        .page-wrap {
            min-height: 100vh;
        }
        .layout-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: 250px;
            height: 100vh;
            background: #12151F;
            border-right: 1px solid var(--border);
            z-index: 1040;
            display: flex;
            flex-direction: column;
            padding: 24px 18px;
            overflow-y: auto;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .brand-mark {
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: var(--brand);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 20px;
            flex-shrink: 0;
        }
        .brand-name {
            font-size: 17px;
            font-weight: 800;
            line-height: 1.35;
            letter-spacing: 0.02em;
            color: var(--text-primary);
        }
        .site-nav {
            margin-top: 36px;
            flex: 0 0 auto;
        }
        .nav-group {
            font-size: 13px;
            color: var(--text-muted);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            padding: 8px 10px 4px;
            margin-bottom: 6px;
            font-weight: 600;
        }
        .nav-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 14px;
            margin-bottom: 4px;
            border-radius: 10px;
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            line-height: 1.45;
            position: relative;
            transition: all .22s ease;
        }
        .nav-item:hover {
            background: rgba(112, 88, 255, 0.10);
            color: var(--text-primary);
        }
        .nav-item.active {
            background: rgba(112, 88, 255, 0.14);
            color: #fff;
        }
        .nav-item.active::before {
            content: "";
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 20px;
            border-radius: 4px;
            background: var(--brand);
        }
        .layout-main {
            margin-left: 250px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        .page-container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 32px;
            padding-right: 32px;
        }
        .sidebar-action {
            margin-top: auto;
            padding-top: 28px;
        }
        .btn-help-side {
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(112, 88, 255, 0.18);
            border: 1px solid rgba(112, 88, 255, 0.4);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            padding: 13px 16px;
            border-radius: var(--radius-btn);
            transition: all .25s;
            gap: 8px;
        }
        .btn-help-side:hover {
            background: var(--brand);
            border-color: var(--brand);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(112, 88, 255, 0.25);
        }
        .mobile-topbar {
            display: none;
            position: sticky;
            top: 0;
            z-index: 1030;
            background: #12151F;
            border-bottom: 1px solid var(--border);
            height: 64px;
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
        }
        .mobile-menu-panel {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            background: #12151F;
            border-bottom: 1px solid var(--border);
            z-index: 1029;
            padding: 16px 20px 24px;
            box-shadow: 0 18px 30px rgba(0, 0, 0, 0.35);
        }
        .mobile-menu-panel.open {
            display: block;
        }
        .mobile-menu-panel .nav-item {
            font-size: 16px;
            padding: 14px 12px;
        }
        .mobile-menu-backdrop {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(4, 6, 12, 0.5);
            z-index: 1028;
        }
        .mobile-menu-backdrop.show {
            display: block;
        }
        @media (max-width: 991.98px) {
            .layout-sidebar {
                display: none;
            }
            .layout-main {
                margin-left: 0;
            }
            .mobile-topbar {
                display: flex;
            }
            .page-container {
                padding-left: 20px;
                padding-right: 20px;
            }
        }
        .main-content {
            flex: 1;
            overflow-x: hidden;
        }
        .section-cat-hero {
            background:
                radial-gradient(ellipse at 10% 20%, rgba(112, 88, 255, 0.18) 0%, rgba(112, 88, 255, 0) 45%),
                radial-gradient(ellipse at 95% 20%, rgba(39, 224, 174, 0.12) 0%, rgba(39, 224, 174, 0) 45%),
                linear-gradient(90deg, #0D101C 0%, #10131F 100%);
            border-bottom: 1px solid var(--border);
            padding: 80px 0 64px;
        }
        .breadcrumb-custom {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .breadcrumb-custom a {
            color: var(--text-secondary);
        }
        .breadcrumb-custom a:hover {
            color: var(--accent);
        }
        .breadcrumb-custom .sep {
            color: var(--text-muted);
        }
        .cat-hero-title {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 18px;
            letter-spacing: 0.01em;
        }
        .cat-hero-desc {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-secondary);
            max-width: 720px;
            margin-bottom: 20px;
        }
        .cat-hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 28px;
        }
        .tag-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border);
            padding: 6px 14px;
            border-radius: 30px;
        }
        .tag-badge i {
            color: var(--brand);
        }
        .btn-primary-custom {
            background: var(--brand);
            border: 1px solid var(--brand);
            color: #fff;
            padding: 13px 28px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 16px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: all .25s;
            cursor: pointer;
        }
        .btn-primary-custom:hover {
            background: #836afa;
            border-color: #836afa;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(112, 88, 255, 0.25);
        }
        .btn-outline-custom {
            background: transparent;
            border: 1px solid var(--border);
            color: var(--text-primary);
            padding: 13px 28px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 16px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: all .25s;
            cursor: pointer;
        }
        .btn-outline-custom:hover {
            border-color: var(--brand);
            color: #fff;
            transform: translateY(-2px);
        }
        .section-cat-guide {
            padding: var(--space-section) 0;
        }
        .section-head {
            margin-bottom: 40px;
        }
        .section-eyebrow {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.08em;
            color: var(--accent);
            text-transform: uppercase;
            margin-bottom: 10px;
            padding: 4px 14px;
            border: 1px solid rgba(39, 224, 174, 0.3);
            border-radius: 30px;
            background: rgba(39, 224, 174, 0.06);
        }
        .section-title {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 14px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.8;
        }
        .security-panel {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .security-card {
            background: var(--bg-panel);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 32px;
            box-shadow: var(--shadow-card);
            transition: all .3s ease;
            position: relative;
            overflow: hidden;
        }
        .security-card::after {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: transparent;
            transition: background .3s;
        }
        .security-card:hover {
            transform: translateY(-3px);
            border-color: rgba(112, 88, 255, 0.35);
            box-shadow: var(--shadow-hover);
        }
        .security-card:hover::after {
            background: var(--brand);
        }
        .sc-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: rgba(112, 88, 255, 0.14);
            color: var(--brand);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 20px;
        }
        .security-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .security-card p {
            font-size: 14.5px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 0;
        }
        .section-steps {
            padding: var(--space-section) 0;
            background: var(--bg-panel);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .steps-wrap {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }
        .step-item {
            text-align: left;
            padding: 24px;
            border-radius: var(--radius-card);
            background: var(--bg-panel-2);
            border: 1px solid var(--border);
            position: relative;
            transition: transform .3s, box-shadow .3s;
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .step-num {
            font-size: 28px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1;
            margin-bottom: 14px;
            opacity: 0.9;
        }
        .step-item h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }
        .section-scene {
            padding: var(--space-section) 0;
        }
        .scene-layout {
            display: grid;
            grid-template-columns: 1.1fr 1fr;
            gap: 44px;
            align-items: center;
        }
        .scene-info h2 {
            font-size: 30px;
            font-weight: 800;
            line-height: 1.35;
            margin-bottom: 16px;
        }
        .scene-info p {
            font-size: 15.5px;
            color: var(--text-secondary);
            margin-bottom: 18px;
            line-height: 1.85;
        }
        .scene-list-item {
            display: flex;
            gap: 14px;
            padding: 14px 0;
            border-bottom: 1px solid var(--border);
            align-items: flex-start;
        }
        .scene-list-item:last-child {
            border-bottom: none;
        }
        .scene-list-icon {
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: rgba(255, 181, 71, 0.14);
            color: var(--amber);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            flex-shrink: 0;
            margin-top: 3px;
        }
        .scene-list-content strong {
            display: block;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 3px;
            color: var(--text-primary);
        }
        .scene-list-content span {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: block;
        }
        .scene-image-wrap {
            border-radius: 20px;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            background: var(--bg-panel);
        }
        .scene-image-wrap img {
            width: 100%;
            height: 330px;
            object-fit: cover;
        }
        .section-alert {
            padding: 30px 0 20px;
        }
        .alert-custom {
            background: rgba(255, 181, 71, 0.06);
            border: 1px solid rgba(255, 181, 71, 0.22);
            border-radius: 16px;
            padding: 24px 28px;
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }
        .alert-custom .alert-icon {
            font-size: 18px;
            color: var(--amber);
            margin-top: 4px;
            flex-shrink: 0;
        }
        .alert-custom strong {
            display: block;
            font-size: 15px;
            margin-bottom: 4px;
            color: var(--text-primary);
        }
        .alert-custom p,
        .alert-custom div {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }
        .section-faq {
            padding: var(--space-section) 0;
            background: var(--bg-panel);
        }
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-panel-2);
            border: 1px solid var(--border);
            border-radius: 14px;
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color .3s ease;
        }
        .faq-item:hover {
            border-color: rgba(112, 88, 255, 0.3);
        }
        .faq-q {
            display: flex;
            padding: 20px 24px;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            gap: 16px;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 16px;
            font-weight: 600;
            text-align: left;
            width: 100%;
            line-height: 1.5;
        }
        .faq-sign {
            color: var(--accent);
            font-size: 22px;
            font-weight: 700;
            line-height: 1;
            margin-top: -2px;
            transition: transform .3s;
            flex-shrink: 0;
        }
        .faq-item.open .faq-sign {
            transform: rotate(45deg);
        }
        .faq-a {
            display: none;
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.85;
        }
        .faq-a p {
            margin-bottom: 8px;
        }
        .section-cta {
            padding: var(--space-section) 0;
        }
        .cta-panel-custom {
            background:
                linear-gradient(135deg, rgba(112, 88, 255, 0.2) 0%, rgba(112, 88, 255, 0) 55%),
                var(--bg-panel);
            border-radius: 24px;
            padding: 56px;
            text-align: center;
            border: 1px solid var(--border);
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .cta-panel-custom::before {
            content: "";
            position: absolute;
            top: -60px;
            right: -60px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(39, 224, 174, 0.08);
        }
        .cta-panel-custom h2 {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 14px;
        }
        .cta-panel-custom p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-btns {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn-accent-custom {
            background: var(--accent);
            color: #0b0e19;
            padding: 13px 28px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 16px;
            border: 1px solid var(--accent);
            transition: all .25s;
        }
        .btn-accent-custom:hover {
            background: #32f2bf;
            color: #0b0e19;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(39, 224, 174, 0.25);
        }
        .site-footer {
            background: #0d0f17;
            border-top: 1px solid var(--border);
            padding: 56px 0 24px;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .brand {
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            max-width: 360px;
            line-height: 1.8;
            margin-bottom: 0;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 18px;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 12px;
            transition: color .25s;
        }
        .footer-col a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom p {
            margin: 0;
        }
        .footer-disclaimer {
            max-width: 480px;
        }
        @media (max-width: 1199.98px) {
            .steps-wrap {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 991.98px) {
            :root {
                --space-section: 64px;
            }
            .section-cat-hero {
                padding: 48px 0 40px;
            }
            .cat-hero-title {
                font-size: 36px;
            }
            .scene-layout {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .security-panel {
                grid-template-columns: 1fr;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }
        @media (max-width: 767.98px) {
            .cat-hero-title {
                font-size: 30px;
            }
            .page-container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .steps-wrap {
                grid-template-columns: 1fr;
            }
            .scene-list-content span {
                font-size: 13px;
            }
            .alert-custom {
                flex-direction: column;
            }
            .cta-panel-custom {
                padding: 36px 22px;
            }
            .cta-panel-custom h2 {
                font-size: 26px;
            }
            .footer-bottom {
                flex-direction: column;
            }
        }
        .scene-image-wrap .img-alt {
            background: var(--bg-panel-2);
            padding: 12px 16px;
            font-size: 13px;
            color: var(--text-muted);
            border-top: 1px solid var(--border);
        }
        .accordion-icon {
            display: inline-block;
            transition: transform .3s ease;
            color: var(--brand);
            font-weight: 700;
            font-size: 16px;
            margin-right: 8px;
        }
        .section-more {
            padding: 48px 0 0;
        }
        .link-row {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 24px;
            font-size: 14px;
            color: var(--text-secondary);
        }
        .link-row a {
            color: var(--text-secondary);
            border-bottom: 1px solid transparent;
            transition: all .2s;
        }
        .link-row a:hover {
            color: var(--accent);
            border-color: var(--accent);
        }
        .modal-content {
            background: var(--bg-panel);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 18px;
            color: var(--text-primary);
        }
        .modal-header,
        .modal-footer {
            border-color: var(--border);
        }
        .btn-close {
            filter: invert(1) grayscale(100%);
        }
        .form-control {
            background: var(--bg-panel-2);
            border: 1px solid var(--border);
            color: var(--text-primary);
            border-radius: 10px;
            padding: 11px 14px;
        }
        .form-control:focus {
            background: var(--bg-panel-2);
            border-color: var(--brand);
            color: var(--text-primary);
            box-shadow: 0 0 0 3px rgba(112, 88, 255, 0.2);
        }
        .form-check-input {
            background-color: var(--bg-panel-2);
            border-color: var(--border);
        }
        .form-check-input:checked {
            background-color: var(--brand);
            border-color: var(--brand);
        }
        .form-label {
            color: var(--text-primary);
            font-size: 14px;
            font-weight: 600;
        }
        .sidebar-action {
            margin-top: 36px;
        }
        .search-box {
            margin: 0 0 20px;
            position: relative;
        }

/* roulang page: category3 */
:root{
  --bg:#0a0d18;
  --bg-deep:#080a13;
  --panel:#131828;
  --panel-soft:#1a2033;
  --line:rgba(236,237,255,.08);
  --line-strong:rgba(236,237,255,.16);
  --font:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  --text:#eef0f8;
  --muted:#a7afc5;
  --weak:#737c9a;
  --primary:#7058ff;
  --primary-light:#8e7cff;
  --accent:#27e0ae;
  --accent-soft:#34f2c0;
  --amber:#ffb547;
  --pink:#ff79b0;
  --radius-lg:20px;
  --radius-md:14px;
  --radius-sm:9px;
  --shadow:0 10px 30px rgba(0,0,0,.22);
  --shadow-hover:0 16px 42px rgba(0,0,0,.3);
  --gutter:clamp(20px,4.5vw,64px);
}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  line-height:1.8;
  font-size:16px;
}
*,*::before,*::after{box-sizing:border-box}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,background .2s ease}
a:hover{color:var(--primary-light)}
img{max-width:100%;display:block}
button{font-family:inherit}
input,select,textarea{font-family:inherit}
.page-wrap{min-height:100vh}
.main-col{
  margin-left:252px;
  background:
    radial-gradient(circle at 84% 8%,rgba(112,88,255,.12),transparent 26%),
    radial-gradient(circle at 30% 58%,rgba(39,224,174,.07),transparent 20%),
    var(--bg);
  min-height:100vh;
  overflow:hidden;
}
.container-block{width:min(1200px,100% - var(--gutter));margin-inline:auto}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  border:1px solid rgba(112,88,255,.35);
  background:rgba(112,88,255,.12);
  padding:6px 14px;border-radius:999px;
  font-size:13px;color:#c8c4ff;letter-spacing:.04em;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:99px;background:var(--accent)}

.sidebar{
  position:fixed;inset:0 auto 0 0;width:252px;z-index:1050;
  background:var(--bg-deep);
  border-right:1px solid var(--line);
  display:flex;flex-direction:column;
  padding:0 0 18px;
}
.sidebar .sidebar-scroll{
  height:100%;display:flex;flex-direction:column;overflow-y:auto;
  padding:22px 16px 12px;
}
.sidebar-brand{
  padding:4px 10px 18px;border-bottom:1px solid var(--line);
}
.brand{
  display:inline-flex;align-items:flex-start;gap:10px;
}
.brand-mark{
  flex:none;width:36px;height:36px;border-radius:12px;
  background:linear-gradient(145deg,#7d5cff,#3f2f96);
  color:#fff;font-size:22px;font-weight:700;line-height:38px;text-align:center;
  box-shadow:0 0 0 4px rgba(112,88,255,.12);
}
.brand-name{
  display:block;font-size:16px;line-height:1.35;font-weight:700;color:#f1f2fb;
  padding-top:2px;
  white-space:normal;
}
.brand-name span{color:#bfaaff;font-weight:600}
.site-nav{
  margin:16px 0;display:block;
}
.site-nav .nav-group{
  font-size:12px;letter-spacing:.14em;color:var(--weak);
  padding:8px 14px 7px;text-transform:uppercase;
}
.site-nav .nav-item{
  position:relative;display:block;
  padding:10px 14px;font-size:15px;color:var(--muted);
  border-radius:10px;margin:4px 0;
}
.site-nav .nav-item:hover{color:#f4f3ff;background:rgba(255,255,255,.045)}
.site-nav .nav-item.active{
  color:#fff;background:rgba(112,88,255,.16);
}
.site-nav .nav-item.active::before{
  content:"";position:absolute;left:-3px;top:25%;bottom:25%;width:4px;
  background:var(--accent);border-radius:6px;
}
.sidebar-cta{
  margin-top:auto;padding:14px 6px 0;
  border-top:1px solid var(--line);
}
.sidebar-card{
  background:var(--panel);border:1px solid var(--line);border-radius:16px;
  padding:16px 16px 14px;
}
.sidebar-card strong{display:block;font-size:14px;color:#e5e2ff;margin-bottom:6px}
.sidebar-card p{font-size:12px;color:var(--weak);margin:0 0 12px;line-height:1.6}
.portal-btn{
  display:flex;align-items:center;justify-content:center;gap:8px;
  background:var(--primary);color:#fff;border:none;
  font-size:14px;font-weight:600;border-radius:10px;
  padding:11px 10px;width:100%;
}
.portal-btn:hover{background:#8a6eff;color:#fff;transform:translateY(-2px)}
.side-card-tip{font-size:11px;color:var(--weak);margin:10px 3px 0;line-height:1.6}

.mobile-header{
  display:none;
  position:sticky;top:0;z-index:1030;
  height:64px;padding:0 18px;
  align-items:center;justify-content:space-between;
  background:rgba(9,12,23,.92);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.mobile-header .brand-mark{width:32px;height:32px;line-height:34px;font-size:20px;border-radius:10px}
.mobile-header .brand-name{font-size:15px}
.m-nav-toggle{
  width:44px;height:44px;display:flex;align-items:center;justify-content:center;
  background:transparent;border:1px solid var(--line);border-radius:12px;color:#fff;font-size:19px;
}
.mobile-menu{
  position:fixed;left:0;right:0;top:64px;bottom:0;z-index:1028;
  background:var(--bg-deep);
  display:block;overflow-y:auto;
  transform:translateX(-101%);transition:transform .3s ease;
}
.mobile-menu.open{transform:translateX(0)}
.mobile-menu .site-nav{padding:18px}
.mobile-menu .site-nav .nav-item{padding:13px 14px;font-size:16px}
.mobile-menu .portal-btn{margin:20px 18px 0}
.menu-close{position:absolute;top:6px;right:10px;width:38px;height:38px;border:0;background:transparent;color:#fff;font-size:20px}

.hero{
  position:relative;
  padding:92px 0 58px;
  overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    linear-gradient(120deg,rgba(10,13,24,.88) 0%,rgba(10,13,24,.72) 48%,rgba(10,13,24,.25) 88%),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
}
.hero::after{
  content:"";position:absolute;top:-180px;right:-160px;width:440px;height:440px;
  background:radial-gradient(circle,rgba(112,88,255,.34),transparent 68%);
  pointer-events:none;filter:blur(6px);
}
.hero-inner{position:relative;z-index:2;display:grid;gap:48px;align-items:center}
.hero-copy{max-width:620px}
.page-breadcrumb{display:flex;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--weak);margin-bottom:16px}
.page-breadcrumb a{color:var(--muted)}
.page-breadcrumb a:hover{color:#fff}
.page-breadcrumb .sep{opacity:.5}
.hero h1{
  font-size:clamp(34px,5vw,52px);font-weight:800;line-height:1.16;
  margin:20px 0 18px;letter-spacing:-.01em;
}
.hero h1 em{
  font-style:normal;color:var(--primary-light);
}
.hero-lead{
  font-size:18px;color:var(--muted);line-height:1.95;
  margin-bottom:28px;
}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-note{
  display:flex;align-items:center;gap:8px;margin-top:26px;
  font-size:13px;color:var(--weak);
}
.hero-note i{color:var(--accent)}
.hero-visual-wrap{
  position:relative;
  display:flex;align-items:center;justify-content:center;
}
.hero-card{
  width:min(420px,100%);border-radius:24px;
  border:1px solid var(--line-strong);
  background:var(--panel);
  padding:12px;
  box-shadow:var(--shadow);
  transform:rotate(1.2deg);
}
.hero-card:hover{transform:rotate(0) translateY(-4px)}
.hero-card .img-frame{border-radius:18px;overflow:hidden;aspect-ratio:4/3;background:var(--panel-soft)}
.hero-card img{width:100%;height:100%;object-fit:cover}
.card-media-note{padding:14px 6px 8px}
.rank-ribbon{
  display:inline-flex;align-items:center;gap:6px;
  background:rgba(255,181,71,.15);border:1px solid rgba(255,181,71,.28);
  color:var(--amber);font-size:12px;padding:4px 9px;border-radius:8px;
}
.media-title{font-weight:700;margin:9px 0 5px}
.media-desc{font-size:12.5px;color:var(--weak);line-height:1.6;margin:0}
.ver-badge{
  position:absolute;right:-10px;bottom:18px;
  background:var(--accent);color:#071a14;
  font-size:13px;font-weight:800;border-radius:12px;
  padding:8px 15px;
  box-shadow:0 8px 20px rgba(39,224,174,.25);
}

.section{
  padding:80px 0;
}
.section.soft{
  background:var(--bg-deep);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:20px;
  margin-bottom:34px;
}
.section-head .sub{color:var(--muted);max-width:560px;margin:8px 0 0}
.heading-kicker{font-size:13px;letter-spacing:.1em;color:var(--accent);display:block;margin-bottom:8px}
.section-title{font-size:clamp(24px,3vw,34px);line-height:1.28;font-weight:800;margin:0}

.card-cover-list{
  display:grid;grid-template-columns:repeat(12,1fr);gap:22px;
}
.feature-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:28px;
  transition:transform .25s,border-color .25s,box-shadow .25s;
  position:relative;
}
.feature-card:nth-child(1){grid-column:span 7}
.feature-card:nth-child(2){grid-column:span 5}
.feature-card:nth-child(3){grid-column:span 5}
.feature-card:nth-child(4){grid-column:span 7}
.feature-card:hover{transform:translateY(-4px);border-color:rgba(112,88,255,.42);box-shadow:var(--shadow-hover)}
.feature-icon{
  width:46px;height:46px;border-radius:14px;margin-bottom:18px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(112,88,255,.17);color:#b9a9ff;
}
.feature-card:nth-child(2) .feature-icon{background:rgba(39,224,174,.15);color:var(--accent)}
.feature-card:nth-child(3) .feature-icon{background:rgba(255,181,71,.15);color:var(--amber)}
.feature-card:nth-child(4) .feature-icon{background:rgba(255,121,176,.12);color:var(--pink)}
.feature-card h3{font-size:20px;font-weight:750;margin:0 0 9px}
.feature-card p{color:var(--muted);font-size:14.5px;margin:0 0 16px}
.feature-more{
  display:inline-flex;align-items:center;gap:6px;
  color:#cbc5ff;font-size:13px;
}
.feature-more i{font-size:11px;transition:transform .2s}
.feature-more:hover{color:#fff}
.feature-more:hover i{transform:translateX(4px)}

.versions-wrap{
  border-left:1px solid var(--line-strong);
  padding-left:36px;margin-left:8px;
}
.timeline-item{
  position:relative;
  padding:0 0 34px;
}
.timeline-item::before{
  content:"";position:absolute;left:-44px;top:5px;
  width:15px;height:15px;border-radius:99px;
  background:var(--bg);
  border:3px solid var(--primary-lit,var(--primary));
  box-shadow:0 0 0 5px rgba(112,88,255,.14);
}
.timeline-item:nth-child(2)::before{border-color:var(--accent);box-shadow:0 0 0 5px rgba(39,224,174,.12)}
.timeline-item:last-child::before{border-color:var(--amber);box-shadow:0 0 0 5px rgba(255,181,71,.12)}
.version-head{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-bottom:8px}
.version-date{font-size:13px;color:var(--accent);font-weight:700}
.version-tag{
  padding:3px 10px;border-radius:999px;background:rgba(255,255,255,.05);
  color:var(--muted);font-size:12px;border:1px solid var(--line);
}
.timeline-item h3{font-size:19px;font-weight:700;margin:0 0 6px}
.timeline-item p{max-width:820px;color:var(--muted);font-size:14.5px;margin:0}
.timeline-note{margin-top:14px;background:rgba(255,181,71,.08);border:1px solid rgba(255,181,71,.2);border-radius:12px;padding:12px 16px;font-size:13px;color:#cdd0e0}

.latest-list{
  display:block;
  max-width:1120px;
}
.latest-item{
  display:grid;
  grid-template-columns:150px 1fr auto;
  gap:22px;
  align-items:center;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:13px 16px 13px 13px;
  margin-bottom:16px;
  transition:border-color .25s,box-shadow .25s,transform .25s;
}
.latest-item:hover{
  transform:translateY(-3px);
  border-color:rgba(39,224,174,.32);
  box-shadow:0 12px 30px rgba(0,0,0,.22);
}
.latest-cover{border-radius:12px;overflow:hidden;aspect-ratio:16/9;background:var(--bg)}
.latest-cover img{width:100%;height:100%;object-fit:cover}
.latest-content .micro-date{display:block;font-size:12.5px;color:var(--weak);margin-bottom:5px}
.latest-content h3{font-size:17px;font-weight:700;margin:0 0 5px}
.latest-content p{font-size:13.5px;color:var(--muted);margin:0;line-height:1.7}
.arrow-btn{
  width:40px;height:40px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:rgba(112,88,255,.16);color:#baa9ff;border:1px solid transparent;
  transition:all .2s;
}
.arrow-btn:hover{background:var(--primary);color:#fff;transform:translateX(2px)}
.empty-state{
  max-width:880px;background:var(--panel);border:1px dashed var(--line-strong);
  color:var(--muted);border-radius:16px;padding:26px;
}
.channel-grid{
  display:grid;grid-template-columns:1.05fr .95fr;gap:26px;
}
.channel-main{
  background:linear-gradient(145deg,var(--panel),#151b30);
  border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:30px;position:relative;
}
.channel-main h2{font-size:22px;font-weight:800;margin:0 0 13px}
.channel-main p{color:var(--muted);font-size:14.5px;margin:0 0 18px}
.badge-line{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.tag{
  border:1px solid rgba(255,255,255,.15);
  padding:5px 11px;font-size:12px;color:#c2c6d9;border-radius:30px;
  background:rgba(255,255,255,.02);
}
.tag-light{border-color:rgba(39,224,174,.3);color:var(--accent)}
.tag-warm{border-color:rgba(255,181,71,.28);color:#f6c47b}
.channel-aside{
  background:rgba(255,255,255,.015);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  overflow:hidden;
  display:flex;
  flex-direction:column;
}
.channel-aside img{width:100%;aspect-ratio:16/7;object-fit:cover;margin:0}
.aside-copy{padding:18px 22px 22px}
.aside-copy h3{font-size:18px;font-weight:700;margin:0 0 7px}
.aside-copy p{font-size:13px;color:var(--weak);margin:0;line-height:1.8}

.security-note{
  display:flex;flex-wrap:wrap;gap:28px;margin-top:32px;
  background:rgba(12,16,30,.75);
  border:1px solid var(--line);
  padding:22px 24px;border-radius:16px;
}
.security-note .sec-item{
  flex:1 1 230px;color:var(--muted);
  display:flex;gap:10px;font-size:13.5px;align-items:flex-start;
}
.security-note .sec-item i{
  color:var(--accent);margin-top:3px;
}

.faq-block{
  max-width:960px;
}
.faq-item{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  margin-bottom:14px;
  overflow:hidden;
}
.faq-q{
  width:100%;display:flex;justify-content:space-between;align-items:center;gap:18px;
  background:transparent;border:0;color:#e4e7f4;
  font-size:16px;font-weight:600;text-align:left;
  padding:17px 22px;
}
.faq-q i{color:var(--primary-light);font-size:17px;transition:transform .25s}
.faq-item:not(.open) .faq-i2{display:none}
.faq-item.open .faq-i1{display:none}
.faq-a{
  display:none;
  padding:0 22px 19px;color:var(--muted);font-size:14.5px;line-height:1.85;
}
.faq-item.open .faq-a{display:block}
.faq-a a{color:#b6a5ff;border-bottom:1px dashed rgba(255,255,255,.35)}
.faq-a a:hover{color:#fff;border-bottom-color:var(--primary)}

.cta-panel{
  position:relative;
  background:
    linear-gradient(120deg,rgba(10,14,28,.95),rgba(17,23,44,.8)),
    url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  border:1px solid var(--line-strong);
  border-radius:26px;
  padding:clamp(28px,5vw,64px);
  overflow:hidden;
}
.cta-panel .row-inner{position:relative;z-index:2;display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:24px}
.cta-copy h2{font-size:clamp(22px,2.6vw,30px);font-weight:800;margin:0 0 9px}
.cta-copy p{color:var(--muted);font-size:15px;margin:0;max-width:520px}
.btn-ghost-light{
  display:inline-flex;align-items:center;gap:9px;
  border:1px solid rgba(255,255,255,.32);color:#fff;
  background:rgba(255,255,255,.04);border-radius:12px;
  font-weight:600;padding:12px 22px;transition:.2s;
}
.btn-ghost-light:hover{background:rgba(255,255,255,.09);color:#fff;transform:translateY(-2px);border-color:#fff}
.btn-light-solid{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;color:#1a1e23;border:0;border-radius:12px;
  font-weight:700;padding:12px 24px;transition:.2s;
}
.btn-light-solid:hover{background:var(--accent);color:#101812;transform:translateY(-2px)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-size:15px;border-radius:12px;padding:12px 24px;font-weight:600;
  border:1px solid transparent;transition:all .22s ease;
}
.btn:hover{transform:translateY(-2px)}
.btn:focus-visible,.portal-btn:focus-visible,.arrow-btn:focus-visible,.m-nav-toggle:focus-visible{
  outline:2px solid var(--accent);outline-offset:3px
}
.btn-lavender{background:var(--primary);color:#fff}
.btn-lavender:hover{background:#866dff;color:#fff}
.btn-line{background:transparent;border-color:rgba(255,255,255,.24);color:#dfe1ef}
.btn-line:hover{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.5);color:#fff}
.btn-outline-accent{
  background:transparent;color:var(--accent);border-color:rgba(39,224,174,.5);
}
.btn-outline-accent:hover{background:rgba(39,224,174,.1);color:#4cf4c7}

.site-footer{
  margin-top:70px;
  background:var(--bg-deep);
  border-top:1px solid var(--line);
  padding:54px 0 30px;
}
.page-container{width:min(1200px,100% - var(--gutter));margin-inline:auto}
.footer-top{
  display:grid;
  grid-template-columns:1.4fr 0.8fr 0.8fr;
  gap:42px;
  padding-bottom:34px;
}
.footer-brand .brand-name{font-size:19px;font-weight:700}
.footer-brand p{margin:16px 0 0;color:var(--muted);font-size:13.5px;max-width:390px;line-height:1.9}
.footer-col h4{
  font-size:15px;font-weight:700;color:#f0f2f8;margin:4px 0 18px;
}
.footer-col a{
  display:block;padding:5px 0;font-size:13.5px;color:var(--weak);
}
.footer-col a:hover{color:#fff}
.footer-bottom{
  border-top:1px solid var(--line);
  padding-top:26px;
  display:flex;justify-content:space-between;gap:14px;
  flex-wrap:wrap;
}
.footer-bottom p{font-size:12.5px;color:var(--weak);margin:0}
.footer-disclaimer{text-align:right;flex:1 1 100%}

.modal-content{
  background:#151b2b;
  border:1px solid var(--line-strong);
  border-radius:22px;
  color:#eef0f8;
}
.modal-header,.modal-footer{border-color:var(--line)}
.modal-header{padding:20px 24px 0}
.modal-footer{padding:14px 24px 22px}
.modal-title{font-weight:800}
.btn-close{
  background:transparent;color:#fff;opacity:1;
  filter:invert(1);
}
.subscribe-form .form-label{font-size:13px;color:var(--muted)}
.subscribe-form .form-control{
  background:#090d19;
  border:1px solid var(--line-strong);
  color:#f5f6ff;
  border-radius:10px;
  padding:10px 14px;
}
.subscribe-form .form-control:focus{
  border-color:var(--primary);
  box-shadow:0 0 0 4px rgba(112,88,255,.2);
  background:#090d19;
  color:#fff;
}
.privacy-note{font-size:12px;color:var(--weak);margin-top:10px}
.footer-submit{background:var(--primary);color:#fff;border:none;padding:10px 22px;border-radius:10px;font-weight:600}
.footer-submit:hover{background:var(--accent);color:#0b1512}

@media (max-width:1199px){
  .latest-item{grid-template-columns:126px 1fr auto}
  .feature-card:nth-child(n){grid-column:span 6}
}
@media (max-width:991px){
  .sidebar{display:none}
  .main-col{margin-left:0}
  .mobile-header{display:flex}
  .hero{padding:54px 0 38px}
  .hero::before{background:
    linear-gradient(160deg,rgba(10,13,24,.95),rgba(10,13,24,.82)),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat}
  .hero-inner{grid-template-columns:1fr}
  .hero-visual-wrap{order:2}
  .hero-card{max-width:400px}
  .section{padding:56px 0}
  .feature-card:nth-child(1),.feature-card:nth-child(2),
  .feature-card:nth-child(3),.feature-card:nth-child(4){grid-column:span 12}
  .channel-grid{grid-template-columns:1fr}
}
@media(max-width:767px){
  .container-block{width:calc(100% - 40px)}
  .hero h1{font-size:33px}
  .hero-lead{font-size:16px}
  .section-head{flex-direction:column;align-items:flex-start;gap:8px}
  .versions-wrap{padding-left:24px;margin-left:0}
  .timeline-item::before{left:-33px}
  .latest-item{
    grid-template-columns:96px 1fr;
    gap:14px;align-items:start;
  }
  .arrow-btn{display:block;grid-column:2;width:100%;margin-top:2px}
  .latest-cover{aspect-ratio:1/1;grid-row:span 2}
  .latest-content h3{font-size:15.5px}
  .latest-content p{display:none}
  .legal-badge{position:static}
  .footer-top{grid-template-columns:1fr;gap:24px}
  .footer-col h4{margin-bottom:6px}
  .footer-col a{display:inline-block;margin-right:18px}
  .cta-panel{padding:26px 22px}
  .cta-panel .btn{margin-top:8px}
}
@media(max-width:480px){
  .hero,.section{padding-top:38px;padding-bottom:38px}
  .hero-visual-card{transform:none}
  .hero-actions .btn{width:100%}
  .footer-bottom{flex-direction:column}
}

/* roulang page: category4 */
:root{
      --bg-root:#0B0E19;
      --bg-deep:#0E1220;
      --bg-panel:#141824;
      --bg-soft:#1C2130;
      --bg-hover:#252B3D;
      --brand:#7058FF;
      --brand-light:#8B7AFF;
      --accent:#27E0AE;
      --accent-rgb:39,224,174;
      --warn:#FFB547;
      --text-main:#F2F4FA;
      --text-muted:#B0B7C7;
      --text-dim:#7E879E;
      --border:rgba(255,255,255,.08);
      --border-strong:rgba(255,255,255,.16);
      --radius-sm:8px;
      --radius-md:16px;
      --radius-lg:24px;
      --shadow-sm:0 4px 16px rgba(0,0,0,.18);
      --shadow-md:0 10px 28px rgba(0,0,0,.28);
      --font-sans:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Helvetica Neue",sans-serif;
    }

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

    html{
      scroll-behavior:smooth;
    }

    body{
      margin:0;
      font-family:var(--font-sans);
      background:var(--bg-root);
      color:var(--text-main);
      line-height:1.8;
      -webkit-font-smoothing:antialiased;
      overflow-x:hidden;
    }

    a{
      color:var(--brand-light);
      text-decoration:none;
      transition:color .2s ease;
    }
    a:hover{
      color:#fff;
    }
    img{
      max-width:100%;
      display:block;
    }

    .brand{
      display:flex;
      align-items:center;
      gap:12px;
      padding:26px 22px 10px;
    }
    .brand-mark{
      width:42px;
      height:42px;
      flex:0 0 42px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      background:linear-gradient(145deg,var(--brand),#5336D8);
      color:#fff;
      font-weight:800;
      font-size:21px;
      border-radius:12px;
      letter-spacing:0;
      box-shadow:0 6px 18px rgba(112,88,255,.35);
    }
    .brand-name{
      color:#fff;
      font-weight:700;
      font-size:16px;
      line-height:1.35;
      letter-spacing:.5px;
    }

    .layout-root{
      min-height:100vh;
      display:flex;
    }

    .sidebar{
      width:250px;
      flex:0 0 250px;
      background:var(--bg-deep);
      border-right:1px solid var(--border);
      position:fixed;
      inset:0 auto 0 0;
      z-index:1045;
      display:flex;
      flex-direction:column;
      overflow-y:auto;
    }

    .sidebar .brand{
      border-bottom:1px solid var(--border);
      margin-bottom:8px;
    }

    .site-nav{
      flex:1;
      padding:16px 12px 12px;
    }
    .nav-group{
      font-size:13px;
      font-weight:600;
      letter-spacing:1px;
      color:var(--text-dim);
      text-transform:uppercase;
      margin:22px 12px 8px;
    }
    .nav-group:first-child{
      margin-top:10px;
    }
    .nav-item{
      position:relative;
      display:block;
      color:var(--text-muted);
      font-size:15px;
      line-height:1.4;
      padding:12px 14px;
      border-radius:10px;
      margin:3px 0;
      transition:all .2s ease;
    }
    .nav-item::before{
      content:"";
      position:absolute;
      left:-1px;
      top:50%;
      width:4px;
      border-radius:0 4px 4px 0;
      transform:translateY(-50%);
      background:transparent;
      height:0;
      transition:height .25s ease;
    }
    .nav-item:hover{
      background:rgba(255,255,255,.05);
      color:#fff;
    }
    .nav-item.active{
      color:var(--text-main);
      background:rgba(112,88,255,.12);
      font-weight:600;
    }
    .nav-item.active::before{
      background:var(--brand);
      height:20px;
    }

    .sidebar-footer{
      padding:16px;
      border-top:1px solid var(--border);
    }
    .side-help-box{
      background:linear-gradient(150deg,var(--bg-soft),#1A1F30);
      border:1px solid var(--border);
      border-radius:var(--radius-md);
      padding:18px;
    }
    .side-help-box p{
      color:var(--text-muted);
      font-size:13px;
      margin:0 0 12px;
      line-height:1.6;
    }
    .side-help-box .btn{
      width:100%;
    }

    .content-main{
      width:calc(100% - 250px);
      margin-left:250px;
      min-height:100vh;
      background:var(--bg-root);
      position:relative;
    }

    .page-container{
      width:100%;
      max-width:1200px;
      margin:0 auto;
      padding:24px 32px 56px;
    }

    .page-hero{
      position:relative;
      border-radius:var(--radius-lg);
      padding:52px 48px;
      background:linear-gradient(140deg,#191E31 0%,#121624 65%);
      overflow:hidden;
      margin:28px 0 34px;
      isolation:isolate;
    }
    .page-hero::before{
      content:"";
      position:absolute;
      inset:0;
      background-image:
        radial-gradient(circle at 85% 20%,rgba(39,224,174,.13),transparent 46%),
        radial-gradient(circle at 15% 100%,rgba(112,88,255,.18),transparent 48%);
      z-index:-1;
    }
    .page-hero::after{
      content:"";
      position:absolute;
      top:0;left:0;right:0;height:1px;
      background:linear-gradient(90deg,transparent,rgba(255,255,255,.25),transparent);
    }
    .breadcrumb-line{
      font-size:13px;
      color:var(--text-dim);
      display:flex;
      flex-wrap:wrap;
      gap:6px;
      margin-bottom:14px;
    }
    .breadcrumb-line a{
      color:var(--text-muted);
    }
    .breadcrumb-line a:hover{
      color:#fff;
    }
    .breadcrumb-line .icon{
      font-size:12px;
      color:#5A6275;
    }
    .page-hero h1{
      font-size:44px;
      line-height:1.25;
      font-weight:800;
      margin:0 0 16px;
      color:#fff;
      letter-spacing:1px;
      display:flex;
      align-items:center;
      gap:14px;
    }
    .page-hero h1 .h1-icon{
      width:48px;
      height:48px;
      flex:0 0 48px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      background:rgba(112,88,255,.16);
      border:1px solid rgba(112,88,255,.4);
      color:var(--brand-light);
      border-radius:14px;
      font-size:22px;
    }
    .page-hero .lead{
      max-width:820px;
      font-size:16px;
      color:var(--text-muted);
      margin-bottom:28px;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
    }
    .hero-badge{
      display:inline-block;
      vertical-align:middle;
      padding:4px 12px;
      background:rgba(255,181,71,.12);
      color:var(--warn);
      font-size:13px;
      border-radius:20px;
      border:1px solid rgba(255,181,71,.25);
      margin-bottom:18px;
      letter-spacing:.5px;
    }

    .btn{
      --bs-btn-focus-box-shadow:none;
      border-radius:10px;
      font-weight:600;
      letter-spacing:.3px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      padding:11px 22px;
      transition:transform .2s ease,box-shadow .25s ease,background .2s ease,color .2s ease,border-color .2s ease;
      min-height:44px;
      border:1px solid transparent;
    }
    .btn-primary-custom{
      background:var(--brand);
      border-color:var(--brand);
      color:#fff;
      font-weight:700;
      box-shadow:0 6px 16px rgba(112,88,255,.32);
    }
    .btn-primary-custom:hover{
      background:#8272ff;
      border-color:#8b7aff;
      color:#fff;
      transform:translateY(-2px);
      box-shadow:0 10px 22px rgba(112,88,255,.45);
    }
    .btn-accent-custom{
      background:var(--accent);
      border-color:var(--accent);
      color:#0B0E19;
      font-weight:700;
    }
    .btn-accent-custom:hover{
      background:#50e8c3;
      color:#0B0E19;
      transform:translateY(-2px);
    }
    .btn-ghost{
      background:transparent;
      border-color:var(--border-strong);
      color:var(--text-main);
    }
    .btn-ghost:hover{
      border-color:var(--brand);
      color:#fff;
      transform:translateY(-2px);
      background:rgba(112,88,255,.08);
    }
    .btn:focus-visible{
      outline:2px solid var(--accent);
      outline-offset:2px;
    }
    .btn:active{
      transform:scale(.97);
    }

    .section-block{
      margin-bottom:58px;
    }
    .section-head{
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap:24px;
      margin-bottom:32px;
      flex-wrap:wrap;
    }
    .section-eyebrow{
      display:inline-block;
      color:var(--accent);
      font-size:13px;
      font-weight:700;
      letter-spacing:2px;
      margin-bottom:8px;
    }
    .section-head h2{
      font-size:32px;
      font-weight:800;
      line-height:1.3;
      margin:0;
      color:var(--text-main);
      letter-spacing:.4px;
    }
    .section-head p{
      color:var(--text-muted);
      font-size:15px;
      margin:10px 0 0;
      max-width:660px;
    }

    .quick-cards{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:20px;
    }
    .quick-card{
      background:var(--bg-panel);
      border:1px solid var(--border);
      border-radius:var(--radius-md);
      padding:24px 22px;
      display:flex;
      flex-direction:column;
      transition:all .25s ease;
      position:relative;
      overflow:hidden;
    }
    .quick-card::after{
      content:"";
      position:absolute;
      width:120px;height:120px;border-radius:50%;
      background:radial-gradient(circle,rgba(112,88,255,.18),transparent 70%);
      right:-40px;top:-40px;
      pointer-events:none;
    }
    .quick-card:hover{
      transform:translateY(-3px);
      box-shadow:var(--shadow-md);
      border-color:rgba(112,88,255,.45);
    }
    .quick-card .icon{
      width:50px;height:50px;flex:0 0 50px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      border-radius:14px;
      font-size:22px;
      margin-bottom:16px;
      background:rgba(112,88,255,.14);
      color:var(--brand-light);
      border:1px solid rgba(112,88,255,.25);
    }
    .quick-card h3{
      font-size:17px;
      font-weight:700;
      margin:0 0 6px;
      color:var(--text-main);
      line-height:1.4;
    }
    .quick-card p{
      color:var(--text-muted);
      font-size:14px;
      margin:0 0 14px;
      line-height:1.7;
      flex:1;
    }
    .quick-card .card-link{
      font-size:14px;
      color:var(--accent);
      font-weight:600;
      display:inline-flex;
      align-items:center;
      gap:6px;
    }
    .quick-card .card-link:hover{
      gap:10px;
      color:#fff;
    }

    .checklist-panel{
      background:var(--bg-panel);
      border:1px solid var(--border);
      border-radius:var(--radius-md);
      padding:36px;
      overflow:hidden;
    }
    .checklist-grid{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:28px 32px;
    }
    .check-item{
      display:flex;
      gap:16px;
      align-items:flex-start;
    }
    .check-num{
      width:38px;height:38px;flex:0 0 38px;
      background:transparent;
      border:1px solid var(--brand);
      border-radius:10px;
      color:var(--brand-light);
      display:inline-flex;
      align-items:center;
      justify-content:center;
      font-weight:800;
      font-size:16px;
    }
    .check-item h3{
      font-size:16px;
      font-weight:700;
      margin:2px 0 6px;
      color:var(--text-main);
    }
    .check-item p{
      font-size:14px;
      color:var(--text-muted);
      margin:0;
      line-height:1.75;
    }

    .process-steps{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:20px;
      counter-reset:step;
    }
    .process-card{
      background:var(--bg-soft);
      border-radius:var(--radius-md);
      border:1px solid var(--border);
      padding:24px;
      position:relative;
      transition:all .25s ease;
      counter-increment:step;
    }
    .process-card:hover{
      transform:translateY(-3px);
      border-color:var(--border-strong);
      background:var(--bg-hover);
    }
    .process-card::before{
      content:counter(step);
      font-size:42px;
      font-weight:800;
      letter-spacing:-1px;
      color:rgba(112,88,255,.35);
      line-height:1;
      position:absolute;
      right:18px;top:14px;
    }
    .process-card h3{
      font-size:18px;
      font-weight:700;
      color:var(--text-main);
      margin:0 0 10px;
    }
    .process-card h3 .pi{
      margin-right:6px;
      font-size:18px;
      color:var(--accent);
    }
    .process-card p{
      font-size:14px;
      color:var(--text-muted);
      line-height:1.8;
      margin:0;
    }

    .help-media{
      display:grid;
      grid-template-columns:0.9fr 1.1fr;
      gap:36px;
      align-items:center;
      background:var(--bg-panel);
      border:1px solid var(--border);
      border-radius:var(--radius-lg);
      padding:36px;
      overflow:hidden;
    }
    .media-figure{
      background:var(--bg-soft);
      border-radius:var(--radius-md);
      overflow:hidden;
      margin:0;
      border:1px solid var(--border);
    }
    .media-figure img{
      width:100%;
      aspect-ratio:16/11;
      object-fit:cover;
    }
    .media-text h3{
      font-size:20px;
      font-weight:700;
      margin:0 0 16px;
      color:var(--text-main);
    }
    .media-text p{
      color:var(--text-muted);
      font-size:15px;
      margin:0 0 18px;
      line-height:1.85;
    }
    .media-note{
      display:flex;
      gap:12px;
      background:rgba(39,224,174,.07);
      border:1px solid rgba(39,224,174,.22);
      border-radius:12px;
      padding:14px 18px;
      color:var(--text-muted);
      font-size:14px;
    }
    .media-note i{
      color:var(--accent);
      font-size:18px;
      flex:0 0 auto;
      margin-top:3px;
    }

    .faq-zone{
      background:var(--bg-panel);
      border-radius:var(--radius-lg);
      padding:36px;
      border:1px solid var(--border);
    }
    .accordion-item{
      background:transparent;
      border:0;
      border-bottom:1px solid var(--border);
    }
    .accordion-item:last-child{
      border-bottom:0;
    }
    .accordion-button{
      background:transparent;
      font-family:var(--font-sans);
      font-size:16px;
      font-weight:600;
      color:var(--text-main);
      padding:20px 52px 20px 6px;
      box-shadow:none;
      line-height:1.5;
    }
    .accordion-button::after{
      background:none;
      content:">";
      font-family:"PingFang SC",sans-serif;
      font-size:20px;
      font-weight:300;
      color:var(--accent);
      width:auto;height:auto;
      position:absolute;
      right:12px;
      transform:rotate(90deg);
      transition:transform .25s ease;
    }
    .accordion-button:not(.collapsed){
      color:#fff;
      background:transparent;
      box-shadow:none;
    }
    .accordion-button:not(.collapsed)::after{
      transform:rotate(270deg);
    }
    .accordion-button:focus{
      box-shadow:none;
      outline:2px solid var(--brand);
      outline-offset:2px;
    }
    .accordion-item .accordion-header{
      background:transparent;
    }
    .accordion-body{
      padding:4px 6px 24px;
      color:var(--text-muted);
      font-size:14px;
      line-height:1.9;
    }

    .cta-bottom{
      background:var(--bg-soft);
      border:1px solid var(--border);
      border-radius:var(--radius-lg);
      padding:44px;
      position:relative;
      overflow:hidden;
      text-align:center;
    }
    .cta-bottom::before{
      content:"";
      position:absolute;
      inset:0;
      background:
        linear-gradient(130deg,rgba(112,88,255,.16),transparent 40%),
        radial-gradient(circle at 90% 90%,rgba(39,224,174,.1),transparent 50%);
    }
    .cta-bottom .inner{
      position:relative;
      z-index:1;
    }
    .cta-bottom h2{
      font-size:26px;
      font-weight:800;
      color:var(--text-main);
      margin:0 0 10px;
    }
    .cta-bottom p{
      font-size:15px;
      color:var(--text-muted);
      margin:0 auto 24px;
      max-width:600px;
    }
    .cta-bottom .btn{
      margin:0 6px 10px;
    }

    .site-footer{
      background:#070912;
      border-top:1px solid var(--border);
      padding:40px 0 0;
      margin-left:0;
      width:100%;
    }
    .footer-top{
      display:grid;
      grid-template-columns:1.6fr .8fr .8fr;
      gap:36px;
      padding-bottom:28px;
      border-bottom:1px solid var(--border);
    }
    .footer-brand .brand{
      padding:0 0 14px;
    }
    .footer-brand p{
      color:var(--text-muted);
      font-size:14px;
      max-width:360px;
      margin-top:4px;
    }
    .footer-col{
      display:flex;
      flex-direction:column;
      gap:12px;
    }
    .footer-col h4{
      color:var(--text-main);
      font-size:15px;
      font-weight:700;
      margin:0 0 6px;
    }
    .footer-col a{
      color:var(--text-muted);
      font-size:14px;
      font-weight:400;
      display:inline-block;
      transition:all .2s ease;
    }
    .footer-col a:hover{
      color:var(--accent);
      transform:translateX(4px);
    }
    .footer-bottom{
      padding:20px 0 24px;
      display:flex;
      justify-content:space-between;
      gap:12px;
      flex-wrap:wrap;
      color:var(--text-dim);
      font-size:13px;
    }
    .footer-bottom p{
      margin:0;
    }
    .footer-bottom .footer-disclaimer{
      color:var(--text-dim);
      opacity:.8;
    }

    .mobile-topbar{
      display:none;
    }

    @media (max-width:1199px){
      .quick-cards{
        grid-template-columns:repeat(2,1fr);
      }
      .process-steps{
        grid-template-columns:repeat(4,1fr);
        gap:16px;
      }
      .process-card{
        padding:20px;
      }
      .process-card::before{
        font-size:32px;
      }
      .help-media{
        grid-template-columns:1fr;
      }
      .page-hero{
        padding:40px 32px;
      }
    }

    @media (max-width:991.98px){
      .sidebar{
        transform:translateX(-100%);
        transition:transform .3s ease;
        width:280px;
      }
      .mobile-topbar{
        display:flex;
        align-items:center;
        justify-content:space-between;
        height:64px;
        position:sticky;
        top:0;
        z-index:1045;
        background:var(--bg-deep);
        border-bottom:1px solid var(--border);
        padding:0 20px;
      }
      .mobile-topbar .mobile-brand{
        display:flex;
        align-items:center;
        gap:10px;
        color:#fff;
        font-weight:700;
        font-size:15px;
      }
      .menu-burger{
        width:44px;
        height:44px;
        border:1px solid var(--border);
        border-radius:10px;
        background:var(--bg-panel);
        color:var(--text-main);
        display:inline-flex;
        align-items:center;
        justify-content:center;
        font-size:21px;
        cursor:pointer;
        transition:all .2s ease;
      }
      .menu-burger:hover{
        border-color:var(--brand);
        color:var(--brand-light);
      }
      .content-main{
        width:100%;
        margin-left:0;
      }
      .page-container{
        padding:20px;
      }
      .page-hero{
        padding:28px 22px;
        margin-top:16px;
      }
      .page-hero h1{
        font-size:31px;
      }
      .page-hero .lead{
        font-size:15px;
      }
      .checklist-grid{
        grid-template-columns:1fr;
        gap:22px;
      }
      .process-steps{
        grid-template-columns:repeat(2,1fr);
      }
      .quick-cards{
        grid-template-columns:repeat(2,1fr);
        gap:16px;
      }
      .section-head h2{
        font-size:25px;
      }
      .footer-top{
        grid-template-columns:1fr 1fr;
      }
      .side-help-box{
        display:none;
      }
      body.menu-open .sidebar{
        transform:translateX(0);
        box-shadow:0 0 60px rgba(0,0,0,.5);
      }
      body.menu-open .sidebar .side-help-box{
        display:block;
      }
      body.menu-open{
        overflow:hidden;
      }
      .menu-backdrop{
        position:fixed;
        inset:0;
        background:rgba(5,6,10,.78);
        z-index:1040;
        display:none;
        backdrop-filter:blur(2px);
      }
      body.menu-open .menu-backdrop{
        display:block;
      }
    }

    @media (max-width:767px){
      .quick-cards{
        grid-template-columns:1fr 1fr;
      }
      .quick-card .icon{
        width:44px;height:44px;
        font-size:19px;
      }
      .quick-card{
        padding:18px;
      }
      .process-steps{
        grid-template-columns:1fr;
      }
      .help-media{
        padding:22px;
      }
      .faq-zone{
        padding:16px;
      }
      .footer-top{
        grid-template-columns:1fr;
      }
      .footer-col a{
        padding:5px 0;
      }
      .cta-bottom{
        padding:30px 20px;
      }
      .cta-bottom h2{
        font-size:22px;
      }
      .checklist-panel{
        padding:24px;
      }
    }

    @media (max-width:520px){
      .page-container{
        padding:16px;
      }
      .page-hero{
        padding:24px 18px;
      }
      .page-hero h1{
        flex-direction:column;
        align-items:flex-start;
        font-size:27px;
      }
      .page-hero .lead{
        line-height:1.8;
      }
      .quick-cards{
        grid-template-columns:1fr;
      }
      .check-item{
        flex-direction:column;
        gap:8px;
      }
      .hero-actions .btn{
        width:100%;
      }
      .section-head{
        display:block;
      }
      .footer-bottom{
        flex-direction:column;
        gap:6px;
        text-align:left;
      }
    }