/* roulang page: index */
:root {
  --bg-primary: #0A0F1E;
  --bg-secondary: #0E152A;
  --bg-tertiary: #101A35;
  --bg-deep: #070C18;
  --brand-blue: #2E7CFF;
  --brand-cyan: #00E0FF;
  --brand-gold: #FFC24B;
  --brand-blue-rgb: 46, 124, 255;
  --brand-cyan-rgb: 0, 224, 255;
  --text-title: #F5F8FF;
  --text-body: #B8C0D4;
  --text-muted: #78819A;
  --border-soft: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.14);
  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-strong: rgba(12, 20, 40, 0.72);
  --glow-blue: rgba(46, 124, 255, 0.35);
  --glow-cyan: rgba(0, 224, 255, 0.25);
  --radius-card: 16px;
  --radius-btn: 10px;
  --transition-base: all .25s ease;
  --font-sans: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
}
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--bg-primary);
  color: var(--text-body);
  font-family: var(--font-sans);
  line-height: 1.7;
  font-size: 15px;
  overflow-x: hidden;
}
img {
  max-width: 100%;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color .2s ease;
}
a:hover {
  color: var(--brand-cyan);
}
.container {
  max-width: 1280px;
  padding-left: 28px;
  padding-right: 28px;
}
.btn {
  border-radius: var(--radius-btn);
  font-weight: 600;
  letter-spacing: .02em;
  padding: 10px 22px;
  border: 1px solid transparent;
  transition: var(--transition-base);
}
.btn:focus,
.btn:focus-visible,
.form-control:focus {
  box-shadow: 0 0 0 4px rgba(0, 224, 255, .18);
  outline: none;
}
.btn-primary-glow {
  background: linear-gradient(135deg, #1f66e0, var(--brand-blue) 55%, #4aa8ff);
  color: #fff;
  border: none;
  box-shadow: 0 8px 26px rgba(46, 124, 255, .35);
}
.btn-primary-glow:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 12px 34px rgba(46, 124, 255, .52);
}
.btn-outline-cyan {
  background: rgba(255, 255, 255, .03);
  color: #cfeaff;
  border: 1px solid rgba(0, 224, 255, .45);
}
.btn-outline-cyan:hover {
  background: rgba(0, 224, 255, .12);
  color: #fff;
  border-color: var(--brand-cyan);
  transform: translateY(-2px);
}
.section {
  padding: 84px 0;
  position: relative;
}
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--brand-cyan);
  background: rgba(0, 224, 255, .08);
  border: 1px solid rgba(0, 224, 255, .18);
  border-radius: 999px;
  padding: 5px 14px;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(26px, 3.4vw, 38px);
  color: var(--text-title);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 14px;
  letter-spacing: .005em;
}
.section-intro {
  color: var(--text-body);
  max-width: 720px;
  font-size: 16px;
  line-height: 1.75;
  margin-bottom: 0;
}

/* 应用外框 */
.app-shell {
  min-height: 100vh;
}

/* 左侧导航 */
.layout-side {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 248px;
  z-index: 1050;
  background: var(--bg-deep);
  border-right: 1px solid var(--border-soft);
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(10px);
}
.side-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 20px 14px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text-title);
}
.brand:hover {
  color: var(--text-title);
}
.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1e5fd6, var(--brand-blue));
  color: #fff;
  font-size: 17px;
  box-shadow: 0 6px 18px rgba(46, 124, 255, .33);
  flex-shrink: 0;
  font-weight: 800;
}
.brand .brand-text {
  font-size: 20px;
  font-weight: 800;
  color: #fff;
}
.brand .brand-sub {
  display: block;
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: .12em;
  margin-top: -2px;
}
.side-bar-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-soft);
  color: #fff;
  border-radius: 8px;
  width: 38px;
  height: 38px;
  font-size: 18px;
}
.side-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 8px 12px;
  overflow-y: auto;
}
.nav-section-label {
  font-size: 11px;
  font-weight: 500;
  color: #5b647d;
  text-transform: uppercase;
  letter-spacing: .1em;
  margin: 22px 8px 8px;
}
.side-nav {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.side-link {
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 12px 14px;
  border-radius: 10px;
  color: #9ca6be;
  font-weight: 500;
  position: relative;
  font-size: 15px;
  border: 1px solid transparent;
  transition: var(--transition-base);
}
.side-link i {
  width: 20px;
  text-align: center;
  font-size: 16px;
}
.side-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, .05);
}
.side-link.is-active {
  color: #fff;
  background: linear-gradient(90deg, rgba(46, 124, 255, .2), rgba(46, 124, 255, .03));
  border-color: rgba(46, 124, 255, .28);
}
.side-link.is-active::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 10px;
  bottom: 10px;
  width: 3px;
  border-radius: 3px;
  background: var(--brand-cyan);
  box-shadow: 0 0 14px var(--brand-cyan);
}
.side-note {
  margin-top: auto;
  padding: 16px 14px 6px;
  color: #566075;
  font-size: 12px;
  line-height: 1.7;
  border-top: 1px solid rgba(255, 255, 255, .04);
}
.side-note a {
  color: #6d7896;
}
.side-note a:hover {
  color: var(--brand-cyan);
}

/* 主内容 */
.layout-main {
  margin-left: 248px;
  min-height: 100vh;
  background: var(--bg-primary);
}

/* Hero */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  overflow: hidden;
}
.hero-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, rgba(5, 8, 18, .95) 12%, rgba(7, 12, 25, .72) 48%, rgba(5, 10, 22, .38) 100%);
}
.hero-section::after {
  content: "";
  position: absolute;
  right: -160px;
  top: 22%;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(0, 224, 255, .15), transparent 60%);
  pointer-events: none;
}
.hero-container {
  position: relative;
  z-index: 2;
  width: 100%;
  padding: 40px 28px;
}
.hero-panel {
  max-width: 560px;
  background: linear-gradient(135deg, rgba(255, 255, 255, .07), rgba(255, 255, 255, .02));
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, .13);
  border-radius: 22px;
  padding: 38px 40px 34px;
  box-shadow: 0 26px 70px rgba(0, 0, 0, .3);
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 13px;
  background: rgba(255, 194, 75, .1);
  border: 1px solid rgba(255, 194, 75, .22);
  color: var(--brand-gold);
  border-radius: 999px;
  font-size: 13px;
  margin-bottom: 20px;
}
.hero-title {
  font-size: clamp(28px, 4.7vw, 46px);
  font-weight: 800;
  color: #fff;
  line-height: 1.22;
  margin-bottom: 18px;
}
.hero-title .gradient-text {
  background: linear-gradient(90deg, #4d9eff, #35d8ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  color: #d3dbec;
  font-size: 16px;
  margin-bottom: 28px;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.hero-scroll {
  position: absolute;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255, 255, 255, .65);
  opacity: .75;
  font-size: 20px;
  animation: floatY 2.4s ease-in-out infinite;
  z-index: 3;
}
@keyframes floatY {
  0%, 100% {
    transform: translate(-50%, 0);
  }
  50% {
    transform: translate(-50%, 10px);
  }
}

/* 通用section head */
.section-head {
  margin-bottom: 46px;
}

/* 玩法介绍 */
.play-section {
  background: var(--bg-primary);
}
.play-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-top: 20px;
}
.play-visual {
  min-height: 320px;
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-soft);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.play-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.play-steps {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.play-step {
  display: flex;
  gap: 18px;
  padding: 22px 8px 22px 0;
  border-bottom: 1px solid var(--border-soft);
  transition: var(--transition-base);
  border-radius: 12px;
}
.play-step:hover {
  background: rgba(255, 255, 255, .02);
  padding-left: 12px;
  padding-right: 12px;
}
.step-no {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 15px;
  background: rgba(46, 124, 255, .14);
  border: 1px solid rgba(46, 124, 255, .3);
  color: #6db2ff;
}
.play-step:nth-child(2) .step-no {
  background: rgba(0, 224, 255, .1);
  border-color: rgba(0, 224, 255, .28);
  color: var(--brand-cyan);
}
.play-step:nth-child(3) .step-no {
  background: rgba(255, 84, 84, .08);
  border-color: rgba(255, 84, 84, .25);
  color: #ff7272;
}
.play-step:nth-child(4) .step-no {
  background: rgba(255, 194, 75, .1);
  border-color: rgba(255, 194, 75, .28);
  color: var(--brand-gold);
}
.step-body h3 {
  font-size: 17px;
  color: var(--text-title);
  margin-bottom: 4px;
  font-weight: 700;
}
.step-body p {
  margin: 0;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.7;
}

/* 焦点/奖励预览 */
.rewards-section {
  background: linear-gradient(180deg, var(--bg-primary), var(--bg-secondary) 16%, var(--bg-primary) 100%);
}
.reward-slider {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.prize-card {
  background: rgba(255, 255, 255, .035);
  border: 1px solid var(--border-soft);
  border-radius: 18px;
  overflow: hidden;
  transition: var(--transition-base);
}
.prize-card:hover {
  transform: translateY(-8px);
  border-color: rgba(0, 224, 255, .35);
  box-shadow: 0 16px 40px rgba(0, 0, 0, .28);
}
.prize-media {
  position: relative;
  aspect-ratio: 4 / 3;
  background: #0c1428;
  overflow: hidden;
}
.prize-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .45s ease;
}
.prize-card:hover .prize-media img {
  transform: scale(1.04);
}
.prize-flag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(10, 15, 30, .78);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 194, 75, .5);
  color: var(--brand-gold);
  padding: 2px 11px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}
.prize-body {
  padding: 20px 20px 22px;
}
.prize-body h3 {
  color: #fff;
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}
.prize-body p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.65;
}
.prize-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--border-soft);
}
.prize-tag {
  color: var(--brand-gold);
  font-size: 13px;
}
.prize-footer a {
  color: #fff;
  font-weight: 500;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.prize-footer a i {
  font-size: 12px;
  transition: transform .2s ease;
}
.prize-footer a:hover i {
  transform: translateX(4px);
}

/* 任务进度区 */
.task-section {
  background: var(--bg-primary);
}
.task-panel {
  background: linear-gradient(150deg, rgba(16, 23, 48, .85), rgba(10, 14, 28, .95));
  border: 1px solid var(--border-medium);
  border-radius: 24px;
  padding: 42px;
  box-shadow: 0 26px 70px rgba(0, 0, 0, .25);
}
.task-panel-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 26px;
}
.task-panel-head .panel-title {
  color: #fff;
  font-size: 21px;
  font-weight: 700;
}
.task-overview {
  background: rgba(255, 255, 255, .04);
  border: 1px solid var(--border-soft);
  border-radius: 14px;
  padding: 14px 20px;
  min-width: 220px;
}
.task-overview .progress-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.task-overview .progress-num {
  font-size: 25px;
  font-weight: 800;
  color: var(--brand-cyan);
  font-family: "Bahnschrift", "Inter", sans-serif;
}
.task-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 12px;
}
.task-item {
  display: flex;
  align-items: center;
  gap: 14px;
  background: rgba(255, 255, 255, .03);
  border: 1px solid var(--border-soft);
  border-radius: 13px;
  padding: 14px 17px;
  transition: var(--transition-base);
}
.task-item.is-hot {
  background: rgba(46, 124, 255, .08);
  border-color: rgba(46, 124, 255, .36);
}
.task-state {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid #4a5470;
  font-size: 11px;
  flex-shrink: 0;
}
.task-item.is-done .task-state {
  border-color: #18d080;
  background: rgba(24, 208, 128, .12);
  color: #18d080;
}
.task-item.is-current .task-state {
  border-color: var(--brand-cyan);
  box-shadow: 0 0 0 4px rgba(0, 224, 255, .1);
}
.task-item-body {
  flex: 1;
  min-width: 0;
}
.task-item-title {
  color: var(--text-title);
  font-weight: 600;
  font-size: 15px;
}
.task-item-desc {
  color: var(--text-muted);
  font-size: 13px;
}
.task-cta {
  flex-shrink: 0;
}
.task-progress-bar {
  height: 6px;
  background: rgba(255, 255, 255, .07);
  border-radius: 10px;
  overflow: hidden;
  margin-top: 6px;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--brand-blue), var(--brand-cyan));
  border-radius: 10px;
  box-shadow: 0 0 14px rgba(0, 224, 255, .4);
}
.empty-state {
  background: rgba(255, 255, 255, .03);
  border: 1px dashed var(--border-medium);
  border-radius: 18px;
  padding: 64px 20px;
  text-align: center;
  color: var(--text-muted);
}
.empty-state i {
  font-size: 40px;
  display: block;
  margin-bottom: 10px;
  color: #4d5972;
}
.empty-state p {
  margin: 0;
  font-size: 15px;
}

/* CTA */
.cta-band {
  padding: 60px 0 0;
}
.cta-card {
  position: relative;
  border-radius: 24px;
  overflow: hidden;
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  padding: 56px 46px;
  border: 1px solid var(--border-medium);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}
.cta-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(7, 11, 22, .92), rgba(8, 14, 28, .58));
}
.cta-card>.cta-content {
  position: relative;
  z-index: 1;
  max-width: 610px;
}
.cta-card h2 {
  font-size: clamp(23px, 3vw, 31px);
  font-weight: 800;
  color: #fff;
  margin-bottom: 10px;
}
.cta-card p {
  color: #b9c8e0;
  margin-bottom: 0;
  font-size: 15px;
}
.cta-actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 最新信息 feed */
.news-section {
  background: var(--bg-secondary);
}
.news-layout {
  display: grid;
  grid-template-columns: .8fr 1.7fr;
  gap: 40px;
}
.news-intro .fa-arrow-up-right-from-square {
  font-size: 14px;
}
.feed-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.feed-item {
  background: rgba(255, 255, 255, .035);
  border: 1px solid var(--border-soft);
  border-radius: 15px;
  padding: 18px 20px;
  transition: var(--transition-base);
  display: flex;
  align-items: flex-start;
  gap: 14px;
}
.feed-item:hover {
  border-color: rgba(46, 124, 255, .35);
  background: rgba(46, 124, 255, .05);
  transform: translateX(4px);
}
.feed-date-box {
  flex-shrink: 0;
  text-align: center;
  background: #0e172e;
  border: 1px solid var(--border-soft);
  border-radius: 12px;
  width: 58px;
  padding: 8px 4px;
}
.feed-date-box .day {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  line-height: 1.1;
}
.feed-date-box .month {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.2;
}
.feed-main {
  flex: 1;
  min-width: 0;
}
.feed-meta-line {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 5px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.feed-meta-line .dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: #46506b;
}
.feed-cat {
  color: var(--brand-gold);
}
.feed-title {
  font-size: 16px;
  font-weight: 700;
  color: #eef3ff;
  line-height: 1.5;
  display: block;
  margin-bottom: 4px;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.feed-title:hover {
  color: var(--brand-cyan);
}
.feed-excerpt {
  color: var(--text-muted);
  font-size: 14px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  margin-bottom: 8px;
}
.feed-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.feed-date {
  color: #66708d;
  font-size: 13px;
}
.feed-more {
  color: var(--brand-cyan);
  font-weight: 500;
  font-size: 13px;
}
.feed-more i {
  font-size: 12px;
  margin-left: 3px;
  transition: transform .2s;
}
.feed-more:hover i {
  transform: translateX(3px);
}

/* 优势区 */
.adv-section {
  background: var(--bg-primary);
}
.adv-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.adv-card {
  background: rgba(255, 255, 255, .027);
  border: 1px solid var(--border-soft);
  border-radius: 16px;
  padding: 26px 28px;
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}
.adv-card::after {
  content: "";
  position: absolute;
  right: -50px;
  bottom: -50px;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(46, 124, 255, .12), transparent 70%);
  border-radius: 50%;
}
.adv-card:hover {
  background: rgba(46, 124, 255, .05);
  border-color: rgba(46, 124, 255, .24);
  transform: translateY(-4px);
}
.adv-icon {
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
  border-radius: 13px;
  margin-bottom: 18px;
  background: rgba(46, 124, 255, .13);
  color: #6fb3ff;
}
.adv-card h3 {
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}
.adv-card p {
  color: var(--text-muted);
  font-size: 14px;
  margin: 0;
}

/* FAQ */
.faq-section {
  background: var(--bg-secondary);
}
.accordion-custom {
  --bs-accordion-bg: rgba(255, 255, 255, .03);
  --bs-accordion-color: var(--text-body);
  --bs-accordion-border-color: var(--border-soft);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.accordion-custom .accordion-item {
  background: rgba(255, 255, 255, .03);
  border: 1px solid var(--border-soft);
  border-radius: 14px !important;
  overflow: hidden;
}
.accordion-custom .accordion-button {
  background: transparent;
  color: #e4ebfa;
  font-weight: 600;
  font-size: 16px;
  padding: 19px 22px;
  box-shadow: none;
}
.accordion-custom .accordion-button::after {
  opacity: .6;
  filter: invert(1);
}
.accordion-custom .accordion-button:not(.collapsed) {
  background: rgba(46, 124, 255, .08);
  color: #fff;
  box-shadow: none;
}
.accordion-custom .accordion-button:focus {
  box-shadow: 0 0 0 3px rgba(0, 224, 255, .16);
}
.accordion-custom .accordion-body {
  color: var(--text-body);
  padding: 4px 22px 20px;
  line-height: 1.85;
  font-size: 14px;
}

/* 页脚 */
.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border-soft);
  padding: 46px 0 24px;
  margin-left: 248px;
  color: #93a0c0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 42px;
  margin-bottom: 32px;
}
.footer-brand {
  color: #fff;
  font-weight: 800;
  font-size: 19px;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 12px;
}
.footer-brand i {
  color: var(--brand-blue);
  font-size: 20px;
}
.footer-desc {
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.85;
  max-width: 340px;
}
.footer-title {
  color: #dbe6ff;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 14px;
}
.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.footer-links a {
  color: #7f89ac;
  font-size: 14px;
}
.footer-links a:hover {
  color: var(--brand-cyan);
}
.footer-copyright {
  border-top: 1px solid rgba(255, 255, 255, .05);
  padding-top: 20px;
  color: #5a637b;
  font-size: 12px;
}

/* 滚动条美化 */
::-webkit-scrollbar {
  width: 9px;
  height: 7px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: #232c47;
  border-radius: 12px;
}

/* 响应式 */
@media (max-width: 1199.98px) {
  .reward-slider {
    grid-template-columns: repeat(2, 1fr);
  }
  .cta-card {
    padding: 44px 32px;
  }
}

@media (max-width: 991.98px) {
  .layout-side {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: auto;
    width: auto;
    height: auto;
    max-height: 100vh;
    border-right: none;
    border-bottom: 1px solid var(--border-soft);
    background: rgba(7, 12, 24, .98);
  }
  .side-header {
    padding: 10px 16px;
  }
  .side-bar-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .side-body {
    display: none;
  }
  #siteNav.show {
    display: flex;
  }
  #siteNav.collapsing {
    display: flex;
  }
  .side-body {
    padding: 8px 16px 20px;
    background: rgba(7, 12, 24, .99);
    max-height: calc(100vh - 56px);
    overflow-y: auto;
    border-top: 1px solid rgba(255, 255, 255, .05);
  }
  .side-note {
    display: none;
  }
  .layout-main {
    margin-left: 0;
    padding-top: 56px;
  }
  .site-footer {
    margin-left: 0;
    padding-top: 34px;
  }
  .news-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

@media (max-width: 767.98px) {
  .section {
    padding: 54px 0;
  }
  .container,
  .hero-container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .hero-panel {
    padding: 28px 22px;
    border-radius: 18px;
  }
  .hero-scroll {
    display: none;
  }
  .play-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .reward-slider {
    grid-template-columns: 1fr;
  }
  .task-panel {
    padding: 22px 16px;
  }
  .cta-card {
    padding: 28px 18px;
  }
  .cta-card h2 {
    font-size: 20px;
  }
  .adv-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 26px;
  }
  .feed-item {
    padding: 12px;
  }
  .feed-date-box {
    display: none;
  }
}
@media (max-width: 520px) {
  .hero-title {
    font-size: 27px;
  }
  .section-title {
    font-size: 24px;
  }
  .hero-actions .btn {
    padding: 9px 14px;
    font-size: 14px;
  }
  .play-step {
    gap: 12px;
  }
}

/* roulang page: article */
:root{
  --bg-deep:#070C18;
  --bg-body:#0A0F1E;
  --bg-panel:#0E152A;
  --bg-panel-2:#111B36;
  --primary:#2E7CFF;
  --primary-light:#00E0FF;
  --gold:#FFC24B;
  --text:#F5F8FF;
  --text-body:#B8C0D4;
  --text-muted:#78819A;
  --border:rgba(255,255,255,.08);
  --border-strong:rgba(255,255,255,.14);
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 10px 40px rgba(0,10,30,.25);
  --sidebar-width:250px;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-en:"Inter","Bahnschrift",var(--font-cn);
}
*{
  box-sizing:border-box;
}
html{
  scroll-behavior:smooth;
}
body{
  margin:0;
  min-height:100vh;
  background:var(--bg-body);
  color:var(--text-body);
  font-family:var(--font-cn);
  font-size:15px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{
  max-width:100%;
  vertical-align:middle;
}
a{
  color:var(--primary);
  text-decoration:none;
  transition:color .2s ease;
}
a:hover{
  color:#fff;
}
h1,h2,h3,h4,h5,h6{
  font-family:var(--font-en);
  font-weight:800;
  color:var(--text);
  line-height:1.3;
}
ul,ol{
  margin-top:0;
}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
.site-shell{
  min-height:100vh;
}
.side-column{
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  z-index:1040;
  width:var(--sidebar-width);
  padding:24px 16px 18px;
  display:flex;
  flex-direction:column;
  background:linear-gradient(180deg,#0B1225 0%,#080F1E 72%);
  border-right:1px solid var(--border);
}
.brand-side{
  display:flex;
  align-items:center;
  gap:12px;
  padding:4px 8px 18px;
  margin-bottom:8px;
  border-bottom:1px solid var(--border);
  color:var(--text);
}
.brand-side:hover{
  color:var(--text);
}
.brand-icon{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:40px;
  height:40px;
  flex:0 0 40px;
  border-radius:12px;
  background:linear-gradient(135deg,var(--primary),var(--primary-light));
  color:#fff;
  font-size:19px;
  box-shadow:0 8px 26px rgba(46,124,255,.35);
}
.brand-text{
  font-size:18px;
  font-weight:800;
  letter-spacing:.01em;
  white-space:nowrap;
}
.side-nav{
  display:flex;
  flex-direction:column;
  gap:6px;
  margin-top:18px;
}
.side-link{
  display:flex;
  align-items:center;
  gap:12px;
  padding:12px 13px;
  border-radius:12px;
  color:var(--text-muted);
  font-size:15px;
  font-weight:600;
  line-height:1;
  border:1px solid transparent;
  transition:all .2s ease;
}
.side-link i{
  width:21px;
  text-align:center;
  font-size:16px;
  color:#52608a;
  transition:color .2s ease;
}
.side-link:hover{
  background:rgba(46,124,255,.10);
  color:#fff;
  border-color:rgba(46,124,255,.12);
}
.side-link:hover i{
  color:var(--primary-light);
}
.side-link.is-active{
  background:linear-gradient(90deg,rgba(46,124,255,.22),rgba(0,224,255,.04));
  border-color:rgba(46,124,255,.16);
  color:#fff;
  box-shadow:inset 3px 0 0 var(--primary),0 8px 30px rgba(46,124,255,.08);
}
.side-link.is-active i{
  color:#fff;
}
.side-note{
  margin-top:auto;
  padding:14px 12px 4px;
  border-top:1px solid var(--border);
}
.side-note small{
  color:var(--text-muted);
  font-size:12px;
  line-height:1.6;
  display:block;
}
.site-main{
  min-height:100vh;
  display:flex;
  flex-direction:column;
  margin-left:var(--sidebar-width);
  background:
    radial-gradient(900px 420px at 85% -5%,rgba(46,124,255,.08),transparent 60%),
    var(--bg-body);
}
.page-main{
  flex:1;
  width:100%;
  padding:52px 28px 72px;
}
.article-reader{
  max-width:1080px;
  margin:0 auto;
}
.breadcrumb-wrap{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  max-width:880px;
  margin:0 auto 22px;
  padding:0 4px;
  font-size:13px;
  color:var(--text-muted);
}
.breadcrumb-wrap a{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--text-muted);
}
.breadcrumb-wrap a:hover{
  color:var(--primary-light);
}
.crumb-arrow{
  font-size:11px;
  opacity:.65;
}
.article-head{
  max-width:880px;
  margin:0 auto 26px;
  text-align:left;
}
.channel-badge{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:6px 13px;
  margin-bottom:16px;
  border-radius:999px;
  background:rgba(46,124,255,.12);
  border:1px solid rgba(46,124,255,.28);
  color:#9cc2ff;
  font-size:12px;
  font-weight:700;
  letter-spacing:.02em;
}
.channel-badge i{
  color:var(--gold);
}
.article-head h1{
  font-size:42px;
  line-height:1.24;
  letter-spacing:.01em;
  margin:0 0 22px;
  color:var(--text);
}
.post-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:18px;
  color:var(--text-muted);
  font-size:13px;
}
.post-meta span{
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.post-meta i{
  color:var(--primary);
}
.cover-figure{
  max-width:880px;
  margin:0 auto 34px;
  position:relative;
}
.cover-figure img{
  width:100%;
  aspect-ratio:16 / 7;
  object-fit:cover;
  border:1px solid var(--border-strong);
  border-radius:20px;
  box-shadow:var(--shadow),0 0 0 1px rgba(255,255,255,.02);
}
.article-body{
  max-width:860px;
  margin:0 auto;
  color:var(--text-body);
  font-size:16px;
  line-height:1.85;
  word-break:break-word;
}
.article-body p{
  margin:0 0 1.5em;
  line-height:1.85;
}
.article-body h2{
  font-size:26px;
  margin:1.8em 0 .8em;
  padding-left:14px;
  border-left:4px solid var(--primary);
  line-height:1.4;
}
.article-body h3{
  font-size:20px;
  margin:1.6em 0 .65em;
  color:#dfe7ff;
}
.article-body ul,
.article-body ol{
  margin:0 0 1.5em;
  padding-left:1.4em;
}
.article-body li{
  margin-bottom:.45em;
}
.article-body a{
  color:var(--primary-light);
  border-bottom:1px solid rgba(0,224,255,.35);
}
.article-body a:hover{
  color:#fff;
  border-color:rgba(255,255,255,.5);
}
.article-body img{
  max-width:100%;
  height:auto;
  border-radius:14px;
  border:1px solid var(--border);
  margin:18px 0;
}
.article-body blockquote{
  margin:1.6em 0;
  padding:18px 22px;
  border-left:4px solid var(--primary);
  border-radius:0 14px 14px 0;
  background:rgba(46,124,255,.08);
  color:#cdd9ff;
}
.article-body blockquote p:last-child{
  margin-bottom:0;
}
.article-body code{
  padding:2px 8px;
  border-radius:6px;
  background:rgba(0,224,255,.09);
  color:var(--primary-light);
  font-size:.9em;
}
.article-body table{
  width:100%;
  margin:1.6em 0;
  border-collapse:collapse;
}
.article-body th,
.article-body td{
  padding:10px 12px;
  border:1px solid var(--border);
  text-align:left;
}
.article-body th{
  background:#0F1930;
  color:var(--text);
}
.post-tags{
  max-width:860px;
  margin:36px auto 0;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  padding-top:24px;
  border-top:1px solid var(--border);
}
.tag-label{
  color:var(--text-muted);
  font-size:13px;
  font-weight:600;
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.tag-label i{
  color:var(--gold);
}
.tag-pill{
  display:inline-block;
  padding:5px 14px;
  border-radius:999px;
  background:rgba(255,255,255,.04);
  border:1px solid var(--border);
  color:#b6c1dd;
  font-size:13px;
}
.tag-pill:hover{
  color:var(--primary-light);
  border-color:rgba(0,224,255,.4);
  background:rgba(0,224,255,.06);
}
.post-guide{
  max-width:860px;
  margin:30px auto 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding:18px 0 6px;
  border-top:1px solid rgba(255,255,255,.04);
}
.post-guide-link{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:10px 18px;
  border-radius:10px;
  background:rgba(255,255,255,.03);
  border:1px solid var(--border);
  color:var(--text-body);
  font-size:14px;
  font-weight:600;
  transition:all .2s ease;
}
.post-guide-link:hover{
  border-color:rgba(46,124,255,.4);
  color:#fff;
  transform:translateY(-2px);
  box-shadow:0 8px 24px rgba(46,124,255,.14);
}
.post-guide-link i{
  color:var(--primary-light);
}
.notfound-panel{
  max-width:680px;
  margin:9vh auto 7vh;
  padding:58px 42px;
  background:linear-gradient(180deg,rgba(46,124,255,.05),rgba(0,0,0,.12));
  border:1px solid var(--border-strong);
  border-radius:22px;
  text-align:center;
  box-shadow:var(--shadow);
}
.notfound-panel .nf-icon{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:70px;
  height:70px;
  margin-bottom:22px;
  border-radius:18px;
  background:rgba(46,124,255,.14);
  color:var(--primary-light);
  font-size:28px;
}
.notfound-panel h1{
  font-size:32px;
  margin-bottom:14px;
}
.notfound-panel p{
  color:var(--text-muted);
  max-width:420px;
  margin:0 auto 28px;
}
.btn-main{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:12px 28px;
  border-radius:12px;
  background:linear-gradient(135deg,var(--primary),#19b9ff);
  color:#fff;
  font-weight:700;
  border:none;
  box-shadow:0 10px 32px rgba(46,124,255,.35);
  transition:all .24s ease;
}
.btn-main:hover{
  transform:translateY(-2px);
  box-shadow:0 16px 40px rgba(46,124,255,.46);
  color:#fff;
}
.site-footer{
  background:#080E1B;
  border-top:1px solid var(--border);
  padding:54px 0 26px;
  width:100%;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr;
  gap:44px;
  padding-bottom:32px;
  border-bottom:1px solid rgba(255,255,255,.05);
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:18px;
  font-weight:800;
  color:#fff;
  margin-bottom:14px;
}
.footer-brand i{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:34px;
  height:34px;
  border-radius:10px;
  background:linear-gradient(135deg,var(--primary),var(--primary-light));
  color:#fff;
  font-size:15px;
  box-shadow:0 6px 16px rgba(46,124,255,.3);
}
.footer-desc{
  max-width:360px;
  color:var(--text-muted);
  font-size:14px;
  line-height:1.8;
  margin:0;
}
.footer-title{
  font-size:14px;
  font-weight:700;
  color:#dbe4ff;
  margin-bottom:18px;
  letter-spacing:.02em;
}
.footer-links{
  list-style:none;
  margin:0;
  padding:0;
}
.footer-links li + li{
  margin-top:10px;
}
.footer-links a{
  color:var(--text-muted);
  font-size:14px;
  transition:all .2s ease;
}
.footer-links a:hover{
  color:var(--primary-light);
  padding-left:4px;
}
.site-footer .footer-copyright{
  padding-top:24px;
  color:var(--text-muted);
  font-size:13px;
  line-height:1.7;
}
.site-footer .footer-copyright a{
  color:var(--text-muted);
}
.site-footer .footer-copyright a:hover{
  color:#fff;
}
::selection{
  background:rgba(46,124,255,.5);
  color:#fff;
}
::-webkit-scrollbar{
  width:10px;
  height:10px;
}
::-webkit-scrollbar-thumb{
  background:#1a2542;
  border-radius:8px;
}
::-webkit-scrollbar-thumb:hover{
  background:#2b3b63;
}
@media (max-width:991.98px){
  :root{
    --sidebar-width:100%;
  }
  .side-column{
    position:relative;
    width:100%;
    height:auto;
    padding:14px 16px 6px;
    border-right:0;
    border-bottom:1px solid var(--border);
    flex-direction:column;
  }
  .brand-side{
    padding:0 8px 10px;
    margin-bottom:0;
  }
  .side-nav{
    flex-direction:row;
    flex-wrap:nowrap;
    gap:8px;
    overflow-x:auto;
    margin:6px 0 2px;
    padding:2px;
    scrollbar-width:none;
  }
  .side-nav::-webkit-scrollbar{
    display:none;
  }
  .side-link{
    padding:9px 15px;
    flex:0 0 auto;
    white-space:nowrap;
  }
  .side-note{
    display:none;
  }
  .site-main{
    margin-left:0;
  }
  .page-main{
    padding:34px 18px 58px;
  }
  .article-head h1{
    font-size:34px;
  }
  .article-body{
    font-size:15.5px;
  }
  .footer-grid{
    grid-template-columns:1fr 1fr;
    gap:34px;
  }
}
@media (max-width:767.98px){
  .page-main{
    padding:26px 14px 48px;
  }
  .article-head h1{
    font-size:28px;
  }
  .breadcrumb-wrap{
    font-size:12px;
    gap:5px;
  }
  .post-meta{
    gap:12px;
    font-size:12.5px;
  }
  .channel-badge{
    font-size:11px;
  }
  .cover-figure img{
    aspect-ratio:16 / 10;
    border-radius:14px;
  }
  .article-body{
    font-size:15px;
  }
  .post-guide{
    flex-direction:column;
    align-items:stretch;
  }
  .post-guide-link{
    justify-content:center;
  }
  .footer-grid{
    grid-template-columns:1fr;
    gap:28px;
  }
  .notfound-panel{
    padding:42px 22px;
    margin:6vh auto 5vh;
  }
  .notfound-panel h1{
    font-size:26px;
  }
}
@media (max-width:520px){
  .brand-text{
    font-size:16px;
  }
  .article-head h1{
    font-size:24px;
  }
  .post-meta{
    flex-direction:column;
    align-items:flex-start;
    gap:7px;
  }
  .article-body{
    line-height:1.8;
  }
  .article-body blockquote{
    padding:14px 16px;
  }
}

/* roulang page: category1 */
:root {
      --bg-page: #0A0F1E;
      --bg-deep: #0B1124;
      --bg-panel: #0E152A;
      --bg-soft: #101A35;
      --accent: #2E7CFF;
      --accent-2: #00E0FF;
      --gold: #FFC24B;
      --text-title: #F5F8FF;
      --text-body: #B8C0D4;
      --text-muted: #78819A;
      --border: rgba(255, 255, 255, 0.08);
      --border-strong: rgba(255, 255, 255, 0.14);
      --glass: rgba(255, 255, 255, 0.04);
      --radius-lg: 18px;
      --radius-md: 14px;
      --radius-sm: 10px;
      --shadow: 0 20px 60px rgba(0, 10, 30, 0.28);
      --font-sans: "Inter", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: var(--font-sans);
      background: var(--bg-page);
      color: var(--text-body);
      line-height: 1.75;
      letter-spacing: 0.02em;
      overflow-x: hidden;
    }

    h1,
    h2,
    h3,
    h4,
    h5,
    h6 {
      color: var(--text-title);
      font-weight: 800;
      letter-spacing: 0.01em;
      line-height: 1.3;
      margin: 0 0 12px;
    }

    p {
      margin: 0 0 16px;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all .25s ease;
    }

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

    ul,
    ol {
      padding-left: 0;
      margin-bottom: 0;
    }

    i {
      font-style: normal;
    }

    .mobile-topbar {
      display: none;
    }

    .nav-backdrop {
      display: none;
    }

    .side-navbar {
      position: fixed;
      top: 0;
      left: 0;
      bottom: 0;
      width: 264px;
      background: linear-gradient(180deg, #0D152A 0%, #090F1F 100%);
      border-right: 1px solid rgba(255, 255, 255, 0.06);
      z-index: 1060;
      display: flex;
      flex-direction: column;
      padding: 0 14px 18px;
    }

    .side-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 26px 10px 20px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      color: var(--text-title);
      font-size: 22px;
      font-weight: 800;
      letter-spacing: 0.01em;
    }

    .side-brand:hover {
      color: #fff;
    }

    .brand-icon {
      width: 38px;
      height: 38px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 11px;
      background: linear-gradient(145deg, rgba(46, 124, 255, 0.9), rgba(0, 224, 255, 0.7));
      color: #fff;
      font-size: 18px;
      box-shadow: 0 0 24px rgba(46, 124, 255, 0.35);
    }

    .side-nav {
      display: flex;
      flex-direction: column;
      gap: 6px;
      padding: 20px 0;
    }

    .side-nav .side-link {
      position: relative;
      height: 48px;
      padding: 0 14px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      gap: 14px;
      color: var(--text-body);
      font-weight: 600;
      font-size: 15px;
      overflow: hidden;
    }

    .side-nav .side-link i {
      width: 22px;
      text-align: center;
      font-size: 16px;
      color: #6A7590;
      transition: all .25s ease;
    }

    .side-nav .side-link span {
      white-space: nowrap;
    }

    .side-nav .side-link:hover {
      color: #fff;
      background: rgba(255, 255, 255, 0.05);
    }

    .side-nav .side-link:hover i {
      color: var(--accent-2);
    }

    .side-nav .side-link.is-active {
      background: linear-gradient(90deg, rgba(46, 124, 255, 0.2), rgba(46, 124, 255, 0.02));
      color: #fff;
    }

    .side-nav .side-link.is-active::before {
      content: "";
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%);
      width: 3px;
      height: 22px;
      border-radius: 0 4px 4px 0;
      background: var(--accent-2);
      box-shadow: 0 0 14px var(--accent-2);
    }

    .side-nav .side-link.is-active i {
      color: var(--accent-2);
    }

    .side-foot {
      margin-top: auto;
      padding: 18px 10px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
    }

    .side-foot-name {
      color: var(--text-title);
      font-weight: 700;
      font-size: 14px;
      margin-bottom: 4px;
    }

    .side-foot-tip {
      font-size: 12px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .main-content {
      min-height: 100vh;
      margin-left: 264px;
      display: flex;
      flex-direction: column;
      background: var(--bg-page);
    }

    .page-wrap {
      flex: 1;
      width: 100%;
      max-width: 1260px;
      margin: 0 auto;
      padding: 30px 32px 50px;
    }

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

    .crumb a {
      color: var(--text-muted);
      transition: color .25s ease;
    }

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

    .crumb i {
      color: rgba(255, 255, 255, 0.3);
      font-size: 12px;
    }

    .crumb .is-now {
      color: var(--text-title);
      font-weight: 600;
    }

    .page-hero {
      position: relative;
      border-radius: var(--radius-lg);
      padding: 52px 48px 46px;
      margin-bottom: 26px;
      background:
        linear-gradient(100deg, rgba(10, 15, 30, 0.92) 0%, rgba(10, 15, 30, 0.72) 55%, rgba(10, 15, 30, 0.55) 100%),
        url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
      overflow: hidden;
    }

    .page-hero::after {
      content: "";
      position: absolute;
      width: 300px;
      height: 300px;
      right: 30px;
      bottom: -150px;
      border-radius: 999px;
      background: rgba(46, 124, 255, 0.18);
      filter: blur(80px);
      pointer-events: none;
    }

    .page-hero .hero-copy {
      position: relative;
      z-index: 2;
      max-width: 760px;
    }

    .hero-overline {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 5px 14px;
      border-radius: 999px;
      border: 1px solid rgba(0, 224, 255, 0.35);
      background: rgba(0, 224, 255, 0.08);
      color: var(--accent-2);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.04em;
      margin-bottom: 20px;
    }

    .page-hero h1 {
      font-size: clamp(30px, 4vw, 48px);
      font-weight: 900;
      letter-spacing: 0.03em;
      margin-bottom: 16px;
    }

    .page-hero .hero-desc {
      font-size: 16px;
      line-height: 1.9;
      color: #D4DAEA;
      max-width: 740px;
      margin-bottom: 26px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 30px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      border-radius: var(--radius-sm);
      font-weight: 700;
      padding: 12px 24px;
      font-size: 15px;
      border: none;
      text-decoration: none;
      line-height: 1;
      cursor: pointer;
      transition: all .25s ease;
      font-family: inherit;
    }

    .btn i {
      font-size: 14px;
      transition: transform .25s ease;
    }

    .btn-accent {
      background: linear-gradient(135deg, var(--accent) 0%, #0B5FE3 100%);
      color: #fff;
      box-shadow: 0 10px 26px rgba(46, 124, 255, 0.28);
    }

    .btn-accent:hover {
      transform: translateY(-2px);
      background: linear-gradient(135deg, #3C8AFF 0%, #1D6EF0 100%);
      color: #fff;
      box-shadow: 0 14px 34px rgba(46, 124, 255, 0.4);
    }

    .btn-line {
      background: rgba(46, 124, 255, 0.08);
      border: 1px solid rgba(46, 124, 255, 0.45);
      color: #AFC9FF;
    }

    .btn-line:hover {
      background: rgba(46, 124, 255, 0.2);
      color: #fff;
      border-color: var(--accent);
    }

    .btn-ghost {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border-strong);
      color: var(--text-body);
    }

    .btn-ghost:hover {
      color: #fff;
      border-color: rgba(255, 255, 255, 0.3);
      background: rgba(255, 255, 255, 0.07);
    }

    .btn-lg {
      padding: 15px 30px;
      font-size: 16px;
    }

    .btn:hover i {
      transform: translateX(3px);
    }

    .hero-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      padding-left: 0;
      list-style: none;
    }

    .hero-tags li {
      padding: 5px 13px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid var(--border);
      color: #B8C0D4;
      font-size: 13px;
      font-weight: 600;
    }

    .hero-tags li i {
      margin-right: 6px;
      font-size: 12px;
      color: var(--gold);
    }

    .cat-layout {
      display: grid;
      grid-template-columns: 220px minmax(0, 1fr);
      gap: 24px;
      align-items: start;
    }

    .cat-index {
      position: sticky;
      top: 30px;
      border-radius: var(--radius-md);
      background: var(--bg-panel);
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
      padding: 22px 18px;
    }

    .index-label {
      display: flex;
      align-items: center;
      gap: 8px;
      color: var(--text-title);
      font-weight: 700;
      font-size: 15px;
      padding-bottom: 14px;
      border-bottom: 1px solid var(--border);
      margin-bottom: 12px;
    }

    .index-label i {
      color: var(--accent-2);
    }

    .index-link {
      display: block;
      padding: 9px 12px;
      border-radius: 10px;
      font-size: 14px;
      color: var(--text-body);
      font-weight: 500;
      transition: all .25s ease;
    }

    .index-link:hover {
      background: rgba(46, 124, 255, 0.1);
      color: #fff;
      padding-left: 16px;
    }

    .index-link i {
      width: 16px;
      font-size: 12px;
      color: var(--accent);
      margin-right: 4px;
    }

    .index-note {
      margin: 16px 0 18px;
      padding: 14px 12px;
      border-radius: 12px;
      background: rgba(0, 224, 255, 0.05);
      border: 1px solid rgba(0, 224, 255, 0.12);
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .btn-block {
      width: 100%;
      justify-content: center;
    }

    .cat-container {
      min-width: 0;
    }

    .cat-section {
      border-radius: var(--radius-lg);
      background: var(--bg-panel);
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
      padding: 34px;
      margin-bottom: 24px;
      overflow: hidden;
    }

    .section-head {
      margin-bottom: 28px;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      font-weight: 800;
      color: var(--accent-2);
      letter-spacing: 0.08em;
      text-transform: uppercase;
      margin-bottom: 8px;
    }

    .eyebrow::before {
      content: "";
      width: 20px;
      height: 2px;
      background: linear-gradient(90deg, var(--accent-2), transparent);
    }

    .section-head h2 {
      font-size: clamp(23px, 2vw, 33px);
      font-weight: 900;
      margin-bottom: 12px;
    }

    .section-head .section-desc {
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.8;
      max-width: 860px;
    }

    .feature-wrap {
      display: grid;
      grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
      gap: 26px;
      align-items: center;
    }

    .feature-media {
      position: relative;
      border-radius: 16px;
      overflow: hidden;
      border: 1px solid var(--border);
      aspect-ratio: 4 / 3;
    }

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

    .feature-media::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, transparent 45%, rgba(10, 15, 30, 0.9) 100%);
    }

    .media-badge {
      position: absolute;
      z-index: 2;
      left: 16px;
      bottom: 14px;
      color: #fff;
      font-weight: 700;
      font-size: 14px;
      background: rgba(46, 124, 255, 0.18);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(255, 255, 255, 0.18);
      padding: 6px 14px;
      border-radius: 999px;
    }

    .media-badge i {
      margin-right: 6px;
      color: var(--gold);
    }

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

    .feature-item {
      display: flex;
      gap: 16px;
      padding: 16px 18px;
      border-radius: 14px;
      background: rgba(255, 255, 255, 0.025);
      border: 1px solid rgba(255, 255, 255, 0.05);
      transition: all .3s ease;
    }

    .feature-item:hover {
      background: rgba(46, 124, 255, 0.06);
      border-color: rgba(46, 124, 255, 0.28);
      transform: translateX(4px);
    }

    .feature-num {
      flex: 0 0 auto;
      width: 38px;
      height: 38px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 11px;
      background: linear-gradient(145deg, rgba(0, 224, 255, 0.15), rgba(46, 124, 255, 0.15));
      border: 1px solid rgba(0, 224, 255, 0.35);
      color: var(--accent-2);
      font-weight: 900;
      font-size: 14px;
      font-family: 'Inter', sans-serif;
    }

    .feature-item h3 {
      font-size: 17px;
      font-weight: 800;
      margin-bottom: 6px;
    }

    .feature-item p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 0;
    }

    .scene-row {
      display: grid;
      grid-template-columns: repeat(12, 1fr);
      gap: 18px;
    }

    .scene-main {
      grid-column: span 7;
      position: relative;
      border-radius: 16px;
      overflow: hidden;
      min-height: 340px;
      background:
        linear-gradient(120deg, rgba(10, 15, 30, 0.82), rgba(10, 15, 30, 0.45)),
        url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
      border: 1px solid var(--border);
      padding: 32px;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
    }

    .scene-main .top-mark {
      align-self: flex-start;
      padding: 5px 12px;
      border-radius: 999px;
      background: rgba(255, 194, 75, 0.14);
      border: 1px solid rgba(255, 194, 75, 0.35);
      color: var(--gold);
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 14px;
    }

    .scene-main h3 {
      font-size: 24px;
      font-weight: 900;
      color: #fff;
      margin-bottom: 8px;
    }

    .scene-main p {
      font-size: 15px;
      color: #CBD4E8;
      margin-bottom: 0;
      max-width: 520px;
    }

    .scene-group {
      grid-column: span 5;
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

    .scene-card {
      position: relative;
      flex: 1;
      border-radius: 16px;
      padding: 22px 24px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border);
      transition: all .3s ease;
    }

    .scene-card:hover {
      border-color: rgba(46, 124, 255, 0.3);
      background: rgba(46, 124, 255, 0.05);
      transform: translateY(-3px);
    }

    .scene-card i {
      width: 38px;
      height: 38px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 11px;
      background: rgba(0, 224, 255, 0.12);
      color: var(--accent-2);
      font-size: 16px;
      margin-bottom: 12px;
    }

    .scene-card h3 {
      font-size: 16px;
      font-weight: 800;
      margin-bottom: 6px;
    }

    .scene-card p {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 0;
    }

    .flow-panel {
      border-radius: 16px;
      background: rgba(0, 0, 0, 0.18);
      border: 1px solid var(--border);
      padding: 26px;
    }

    .flow-step {
      position: relative;
      display: flex;
      gap: 20px;
      padding-bottom: 28px;
    }

    .flow-step:not(:last-child)::after {
      content: "";
      position: absolute;
      left: 21px;
      top: 48px;
      bottom: 0;
      width: 1px;
      border-left: 1px dashed rgba(0, 224, 255, 0.35);
    }

    .flow-step:last-child {
      padding-bottom: 0;
    }

    .flow-dot {
      position: relative;
      z-index: 2;
      flex: 0 0 auto;
      width: 44px;
      height: 44px;
      border-radius: 13px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--bg-soft);
      border: 1px solid rgba(0, 224, 255, 0.3);
      color: var(--accent-2);
      font-weight: 900;
      font-family: 'Inter', sans-serif;
    }

    .flow-body h3 {
      font-size: 17px;
      font-weight: 800;
      margin-bottom: 5px;
    }

    .flow-body p {
      max-width: 720px;
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 0;
    }

    .faq-accordion {
      border: 1px solid var(--border);
      border-radius: 16px;
      overflow: hidden;
      background: rgba(255, 255, 255, 0.02);
    }

    .faq-accordion .accordion-item {
      background: transparent;
      border: none;
      border-bottom: 1px solid var(--border);
    }

    .faq-accordion .accordion-item:last-child {
      border-bottom: none;
    }

    .faq-accordion .accordion-header {
      border: none;
    }

    .faq-accordion .accordion-button {
      background: transparent;
      box-shadow: none;
      color: var(--text-title);
      font-weight: 700;
      font-size: 16px;
      padding: 20px 24px;
      transition: color .3s ease;
    }

    .faq-accordion .accordion-button:not(.collapsed) {
      background: rgba(46, 124, 255, 0.05);
      color: var(--accent-2);
    }

    .faq-accordion .accordion-button::after {
      background-image: none;
      content: '\f078';
      font-family: 'Font Awesome 6 Free';
      font-weight: 900;
      width: 20px;
      height: 20px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--text-muted);
      font-size: 14px;
      transform: none;
      transition: all .3s ease;
    }

    .faq-accordion .accordion-button:not(.collapsed)::after {
      transform: rotate(180deg);
      color: var(--accent-2);
    }

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

    .faq-accordion .accordion-body {
      padding: 4px 24px 24px 24px;
      color: var(--text-body);
      font-size: 14px;
      line-height: 1.9;
      background: rgba(255, 255, 255, 0.015);
    }

    .cta-panel {
      position: relative;
      margin-top: 8px;
      border-radius: var(--radius-lg);
      padding: 44px 42px;
      background:
        linear-gradient(120deg, rgba(10, 15, 30, 0.92), rgba(14, 28, 60, 0.84)),
        url('/assets/images/backpic/back-3.webp') center / cover no-repeat;
      border: 1px solid rgba(46, 124, 255, 0.2);
      box-shadow: var(--shadow);
      overflow: hidden;
      text-align: center;
    }

    .cta-panel::before {
      content: "";
      position: absolute;
      width: 260px;
      height: 260px;
      left: -80px;
      top: -80px;
      border-radius: 999px;
      background: rgba(46, 124, 255, 0.18);
      filter: blur(50px);
    }

    .cta-panel h2 {
      position: relative;
      z-index: 2;
      font-size: clamp(22px, 3vw, 32px);
      font-weight: 900;
      margin-bottom: 12px;
    }

    .cta-panel p {
      position: relative;
      z-index: 2;
      color: #C6CEE0;
      max-width: 620px;
      margin: 0 auto 24px;
    }

    .cta-actions {
      position: relative;
      z-index: 2;
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
    }

    .site-footer {
      background: var(--bg-deep);
      border-top: 1px solid var(--border);
      padding: 54px 0 26px;
    }

    .site-footer .container {
      max-width: 1160px;
      padding: 0 24px;
      margin: 0 auto;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 38px;
    }

    .footer-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      color: #fff;
      font-size: 20px;
      font-weight: 800;
      margin-bottom: 14px;
    }

    .footer-brand i {
      width: 32px;
      height: 32px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 9px;
      background: linear-gradient(145deg, var(--accent), var(--accent-2));
      font-size: 14px;
      color: #fff;
    }

    .footer-desc {
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.8;
      max-width: 340px;
      margin-bottom: 0;
    }

    .footer-title {
      color: var(--text-title);
      font-weight: 700;
      font-size: 15px;
      margin-bottom: 14px;
      letter-spacing: 0.03em;
    }

    .footer-links {
      display: flex;
      flex-direction: column;
      gap: 10px;
      list-style: none;
    }

    .footer-links li a {
      color: var(--text-muted);
      font-size: 14px;
      transition: color .25s ease;
    }

    .footer-links li a:hover {
      color: var(--accent-2);
    }

    .footer-copyright {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 22px;
      color: #5A6480;
      font-size: 13px;
      text-align: center;
      line-height: 1.7;
    }

    .back-to-top {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: var(--text-muted);
      font-size: 14px;
      margin-top: 8px;
    }

    .back-to-top:hover {
      color: var(--accent-2);
    }

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

    @media (max-width: 1199px) {
      .page-wrap {
        padding-left: 24px;
        padding-right: 24px;
      }

      .cat-layout {
        grid-template-columns: 190px minmax(0, 1fr);
        gap: 20px;
      }

      .feature-wrap {
        grid-template-columns: 1fr;
        gap: 22px;
      }

      .feature-media {
        max-height: 360px;
      }
    }

    @media (max-width: 991px) {
      .side-navbar {
        transform: translateX(-102%);
        transition: transform .3s ease;
        box-shadow: 30px 0 70px rgba(0, 0, 0, 0.45);
      }

      body.nav-open {
        overflow: hidden;
      }

      body.nav-open .side-navbar {
        transform: translateX(0);
      }

      .nav-backdrop {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(3, 6, 16, 0.72);
        z-index: 1055;
        opacity: 0;
        pointer-events: none;
        transition: opacity .3s ease;
        -webkit-backdrop-filter: blur(4px);
        backdrop-filter: blur(4px);
      }

      body.nav-open .nav-backdrop {
        opacity: 1;
        pointer-events: auto;
      }

      .mobile-topbar {
        position: sticky;
        top: 0;
        z-index: 1040;
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 64px;
        padding: 0 20px;
        background: rgba(11, 17, 36, 0.92);
        -webkit-backdrop-filter: blur(14px);
        backdrop-filter: blur(14px);
        border-bottom: 1px solid var(--border);
      }

      .mobile-brand {
        display: flex;
        align-items: center;
        gap: 10px;
        color: #fff;
        font-size: 19px;
        font-weight: 800;
      }

      .mobile-brand i {
        width: 34px;
        height: 34px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 10px;
        background: linear-gradient(145deg, var(--accent), var(--accent-2));
        font-size: 15px;
      }

      .nav-toggle {
        width: 42px;
        height: 42px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: rgba(255, 255, 255, 0.05);
        border: 1px solid var(--border);
        border-radius: 11px;
        color: var(--text-title);
        font-size: 18px;
        transition: all .25s ease;
      }

      .nav-toggle:hover {
        background: rgba(46, 124, 255, 0.15);
        border-color: rgba(46, 124, 255, 0.4);
        color: #fff;
      }

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

      .page-wrap {
        padding: 24px 20px 44px;
      }

      .cat-layout {
        grid-template-columns: 1fr;
      }

      .cat-index {
        position: static;
        width: 100%;
        padding: 18px;
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 10px;
      }

      .cat-index .index-label {
        width: 100%;
        margin-bottom: 4px;
        padding-bottom: 10px;
      }

      .cat-index .index-link {
        padding: 8px 15px;
        background: rgba(255, 255, 255, 0.04);
        border-radius: 999px;
        font-size: 13px;
      }

      .cat-index .index-link:hover {
        background: rgba(46, 124, 255, 0.14);
      }

      .cat-index .index-note,
      .cat-index .btn-block {
        display: none;
      }

      .scene-main {
        grid-column: span 12;
      }

      .scene-group {
        grid-column: span 12;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 18px;
      }

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

    @media (max-width: 575px) {
      .page-hero {
        padding: 36px 22px 34px;
      }

      .page-hero .hero-desc {
        font-size: 15px;
      }

      .cat-section {
        padding: 24px 20px;
      }

      .feature-item {
        flex-direction: column;
        gap: 10px;
      }

      .scene-group {
        grid-template-columns: 1fr;
      }

      .cta-panel {
        padding: 34px 20px;
      }

      .site-footer {
        padding: 40px 0 22px;
      }

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

      .footer-desc {
        max-width: 100%;
      }

      .footer-copyright {
        font-size: 12px;
      }

      .flow-panel {
        padding: 18px;
      }

      .flow-step {
        flex-direction: column;
        gap: 10px;
      }

      .flow-step:not(:last-child)::after {
        left: 21px;
        top: 54px;
        bottom: 0;
      }

      .mobile-topbar {
        padding: 0 15px;
      }
    }

/* roulang page: category2 */
:root {
      --bg: #0A0F1E;
      --bg-2: #0E152A;
      --bg-3: #111C36;
      --panel: rgba(255, 255, 255, 0.04);
      --panel-strong: rgba(255, 255, 255, 0.07);
      --border: rgba(255, 255, 255, 0.1);
      --border-light: rgba(255, 255, 255, 0.16);
      --primary: #2E7CFF;
      --primary-deep: #1758D0;
      --accent: #00E0FF;
      --gold: #FFC24B;
      --head: #F5F8FF;
      --text: #B8C0D4;
      --muted: #78819A;
      --success: #35E0A1;
      --danger: #FF6B81;
      --radius: 20px;
      --radius-md: 14px;
      --radius-sm: 10px;
      --shadow: 0 20px 60px rgba(0, 10, 30, 0.35);
      --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      min-height: 100vh;
      background: var(--bg);
      color: var(--text);
      font-family: var(--font);
      font-size: 16px;
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.25s ease, border-color 0.25s ease, background 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
    }

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

    button,
    input {
      font-family: inherit;
    }

    h1,
    h2,
    h3,
    h4,
    h5 {
      color: var(--head);
      font-weight: 700;
      line-height: 1.3;
      margin: 0 0 0.5rem;
    }

    h1 {
      font-size: clamp(2.1rem, 4vw, 3.3rem);
      font-weight: 800;
      letter-spacing: -0.01em;
    }

    h2 {
      font-size: clamp(1.6rem, 2.6vw, 2.2rem);
      font-weight: 800;
    }

    h3 {
      font-size: 1.2rem;
      font-weight: 700;
    }

    ::selection {
      background: rgba(46, 124, 255, 0.4);
      color: #fff;
    }

    ::-webkit-scrollbar {
      width: 10px;
      height: 10px;
    }

    ::-webkit-scrollbar-track {
      background: #0A0F1E;
    }

    ::-webkit-scrollbar-thumb {
      background: #22304C;
      border-radius: 12px;
      border: 2px solid #0A0F1E;
    }

    .side-nav-wrap {
      position: fixed;
      top: 0;
      left: 0;
      bottom: 0;
      z-index: 1040;
      width: 248px;
      display: flex;
      flex-direction: column;
      background: linear-gradient(180deg, #0C1226 0%, #090E1D 100%);
      border-right: 1px solid rgba(255, 255, 255, 0.07);
    }

    .side-brand {
      padding: 28px 20px 18px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .side-logo {
      display: inline-flex;
      align-items: center;
      gap: 12px;
    }

    .logo-badge {
      width: 44px;
      height: 44px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 14px;
      background: linear-gradient(160deg, rgba(46, 124, 255, 0.35), rgba(0, 224, 255, 0.15));
      color: #fff;
      font-size: 20px;
      box-shadow: 0 0 24px rgba(46, 124, 255, 0.3);
    }

    .logo-text {
      display: flex;
      flex-direction: column;
      line-height: 1.25;
    }

    .logo-text strong {
      font-size: 22px;
      font-weight: 800;
      color: var(--head);
      letter-spacing: 0.02em;
    }

    .logo-text small {
      font-size: 12px;
      color: var(--muted);
      letter-spacing: 0.06em;
      margin-top: 2px;
    }

    .side-nav {
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 6px;
      padding: 22px 14px;
    }

    .side-link {
      position: relative;
      display: flex;
      align-items: center;
      gap: 13px;
      height: 50px;
      padding: 0 16px;
      border-radius: var(--radius-md);
      color: var(--muted);
      font-weight: 600;
      font-size: 15px;
      transition: all 0.25s ease;
    }

    .side-link i {
      width: 20px;
      text-align: center;
      font-size: 16px;
      transition: transform 0.25s ease;
    }

    .side-link:hover {
      color: #E9EEF9;
      background: rgba(255, 255, 255, 0.05);
    }

    .side-link:hover i {
      transform: translateX(2px);
    }

    .side-link.is-active {
      color: #fff;
      background: linear-gradient(90deg, rgba(46, 124, 255, 0.2), rgba(46, 124, 255, 0.06));
      box-shadow: inset 3px 0 0 var(--primary);
    }

    .side-link.is-active i {
      color: var(--accent);
    }

    .side-meta {
      padding: 18px 22px;
      font-size: 12px;
      color: rgba(120, 129, 154, 0.7);
      border-top: 1px solid rgba(255, 255, 255, 0.07);
    }

    .side-meta i {
      margin-right: 4px;
      color: rgba(120, 129, 154, 0.6);
    }

    .page-shell {
      min-height: 100vh;
      margin-left: 248px;
      display: flex;
      flex-direction: column;
    }

    .page-main {
      flex: 1;
    }

    .guide-banner {
      position: relative;
      overflow: hidden;
      padding: 84px 0 110px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .banner-bg {
      position: absolute;
      inset: 0;
      background-size: cover;
      background-repeat: no-repeat;
      background-position: center;
    }

    .guide-banner::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 420px;
      height: 420px;
      background: radial-gradient(circle, rgba(0, 224, 255, 0.18), transparent 70%);
      pointer-events: none;
      z-index: 1;
    }

    .guide-banner::after {
      content: "";
      position: absolute;
      right: -160px;
      bottom: -220px;
      width: 560px;
      height: 560px;
      border-radius: 50%;
      background: rgba(46, 124, 255, 0.16);
      filter: blur(90px);
      pointer-events: none;
      z-index: 1;
    }

    .banner-inner {
      position: relative;
      z-index: 3;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 40px;
    }

    .breadcrumb {
      --bs-breadcrumb-divider: "›";
      margin-bottom: 28px;
      font-size: 14px;
      color: var(--muted);
    }

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

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

    .breadcrumb .active {
      color: #DCE4F5;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 15px;
      border-radius: 999px;
      background: rgba(46, 124, 255, 0.15);
      border: 1px solid rgba(46, 124, 255, 0.35);
      color: #D9E7FF;
      font-size: 13px;
      margin-bottom: 20px;
    }

    .hero-tag i {
      color: var(--accent);
    }

    .banner-title {
      color: #fff;
      margin-bottom: 16px;
    }

    .banner-lead {
      max-width: 720px;
      font-size: 17px;
      color: var(--text);
      line-height: 1.8;
      margin-bottom: 30px;
    }

    .banner-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-bottom: 34px;
    }

    .btn-main,
    .btn-ghost,
    .btn-line {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      height: 48px;
      padding: 0 26px;
      border-radius: 12px;
      border: 0;
      font-weight: 700;
      font-size: 15px;
      line-height: 1;
      cursor: pointer;
      transition: all 0.3s ease;
    }

    .btn-main {
      background: linear-gradient(135deg, rgba(46, 124, 255, 0.9), rgba(23, 88, 208, 0.9));
      color: #fff;
      box-shadow: 0 12px 30px rgba(46, 124, 255, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.2);
    }

    .btn-main:hover {
      background: linear-gradient(135deg, #4590ff, #2068E8);
      box-shadow: 0 14px 40px rgba(46, 124, 255, 0.45);
      transform: translateY(-2px);
    }

    .btn-ghost,
    .btn-line {
      border: 1px solid var(--border-light);
      background: rgba(255, 255, 255, 0.05);
      color: var(--head);
    }

    .btn-ghost:hover,
    .btn-line:hover {
      border-color: rgba(0, 224, 255, 0.6);
      color: var(--accent);
      background: rgba(0, 224, 255, 0.07);
      transform: translateY(-2px);
    }

    .banner-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .banner-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 14px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.08);
      color: #C2CBDF;
      font-size: 13px;
    }

    .banner-badge i {
      color: var(--gold);
    }

    .banner-scroll {
      position: absolute;
      left: 50%;
      bottom: 22px;
      transform: translateX(-50%);
      z-index: 3;
      color: rgba(255, 255, 255, 0.5);
      font-size: 13px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 4px;
    }

    .banner-scroll i {
      animation: floatDown 1.8s ease-in-out infinite;
      font-size: 14px;
    }

    @keyframes floatDown {
      0%, 100% {
        transform: translateY(0);
        opacity: 0.5;
      }
      50% {
        transform: translateY(8px);
        opacity: 1;
      }
    }

    .content-section {
      padding: 80px 0;
      position: relative;
    }

    .section-dark {
      background: linear-gradient(180deg, #0A0F1E 0%, #0C1325 100%);
    }

    .section-mid {
      background: linear-gradient(180deg, #0B1120 0%, #0D1428 100%);
    }

    .section-has-decoration::before {
      content: "";
      position: absolute;
      top: 40px;
      right: -120px;
      width: 360px;
      height: 360px;
      background: radial-gradient(circle, rgba(46, 124, 255, 0.08), transparent 70%);
      pointer-events: none;
    }

    .page-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 40px;
      position: relative;
      z-index: 2;
    }

    .section-head {
      max-width: 840px;
      margin-bottom: 46px;
    }

    .section-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--accent);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.08em;
      margin-bottom: 12px;
      text-transform: uppercase;
    }

    .section-kicker::before {
      content: "";
      width: 22px;
      height: 2px;
      background: var(--accent);
      border-radius: 20px;
    }

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

    .way-row {
      --bs-gutter-y: 1.5rem;
    }

    .way-card {
      position: relative;
      height: 100%;
      background: linear-gradient(150deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.02));
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius);
      overflow: hidden;
      transition: all 0.35s ease;
    }

    .way-card:hover {
      border-color: rgba(46, 124, 255, 0.55);
      box-shadow: 0 18px 40px rgba(0, 15, 40, 0.45);
      transform: translateY(-5px);
    }

    .way-media {
      height: 210px;
      overflow: hidden;
      position: relative;
    }

    .way-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

    .way-card:hover .way-media img {
      transform: scale(1.04);
    }

    .way-media::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(10, 15, 30, 0.05), rgba(10, 15, 30, 0.62));
    }

    .way-os-icon {
      position: absolute;
      left: 20px;
      bottom: -18px;
      z-index: 2;
      width: 54px;
      height: 54px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 16px;
      background: linear-gradient(150deg, rgba(46, 124, 255, 0.8), rgba(0, 224, 255, 0.4));
      color: #fff;
      font-size: 24px;
      border: 1px solid rgba(255, 255, 255, 0.3);
      box-shadow: 0 8px 24px rgba(0, 80, 180, 0.35);
    }

    .way-body {
      padding: 34px 24px 24px;
    }

    .way-badge-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 5px 12px;
      font-size: 12px;
      color: var(--gold);
      background: rgba(255, 194, 75, 0.1);
      border: 1px solid rgba(255, 194, 75, 0.2);
      border-radius: 999px;
    }

    .way-body h3 {
      margin-top: 12px;
      font-size: 22px;
      font-weight: 800;
    }

    .way-body p {
      margin: 8px 0 18px;
      color: var(--text);
      font-size: 15px;
      line-height: 1.75;
    }

    .way-specs {
      list-style: none;
      padding: 0;
      margin: 0 0 24px;
      display: grid;
      gap: 10px;
    }

    .way-specs li {
      position: relative;
      padding-left: 28px;
      font-size: 14px;
      color: #C0C9DC;
    }

    .way-specs li i {
      position: absolute;
      left: 0;
      top: 3px;
      width: 18px;
      text-align: center;
      color: var(--success);
    }

    .step-section {
      background: linear-gradient(160deg, rgba(14, 21, 42, 0.9), rgba(8, 13, 29, 0.9));
      position: relative;
      overflow: hidden;
    }

    .step-section::before {
      content: "";
      position: absolute;
      top: 0;
      left: 18%;
      width: 360px;
      height: 360px;
      border-radius: 50%;
      background: rgba(0, 224, 255, 0.05);
      filter: blur(80px);
    }

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

    .step-item {
      position: relative;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius);
      padding: 26px 22px 20px;
      min-height: 210px;
      transition: all 0.3s ease;
      overflow: hidden;
    }

    .step-item::after {
      content: "";
      position: absolute;
      right: -20px;
      bottom: -20px;
      width: 110px;
      height: 110px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(46, 124, 255, 0.06), transparent 70%);
      transition: all 0.35s ease;
    }

    .step-item:hover {
      border-color: rgba(46, 124, 255, 0.4);
      transform: translateY(-4px);
    }

    .step-num {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 38px;
      height: 38px;
      border-radius: 12px;
      font-size: 15px;
      font-weight: 800;
      color: var(--accent);
      background: rgba(0, 224, 255, 0.1);
      border: 1px solid rgba(0, 224, 255, 0.25);
      margin-bottom: 16px;
    }

    .step-item h3 {
      font-size: 17px;
      margin-bottom: 10px;
    }

    .step-item p {
      font-size: 14px;
      color: var(--muted);
      margin: 0;
    }

    .table-panel {
      background: linear-gradient(150deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius);
      padding: 8px;
      overflow-x: auto;
    }

    .data-table {
      width: 100%;
      min-width: 680px;
      border-collapse: collapse;
    }

    .data-table th,
    .data-table td {
      padding: 18px 20px;
      text-align: left;
      border-bottom: 1px solid rgba(255, 255, 255, 0.07);
      font-size: 15px;
    }

    .data-table th {
      color: var(--muted);
      font-size: 14px;
      font-weight: 600;
      white-space: nowrap;
      width: 150px;
    }

    .data-table td {
      color: var(--text);
      line-height: 1.6;
    }

    .data-table tr:last-child th,
    .data-table tr:last-child td {
      border-bottom: 0;
    }

    .data-table td strong {
      color: #EAF0FF;
    }

    .data-icon {
      color: var(--accent);
      margin-right: 6px;
    }

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

    .tip-card {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius);
      padding: 28px 24px;
      transition: all 0.3s ease;
    }

    .tip-card:hover {
      background: rgba(255, 255, 255, 0.07);
      border-color: rgba(255, 194, 75, 0.25);
      transform: translateY(-4px);
    }

    .tip-icon {
      width: 46px;
      height: 46px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 14px;
      background: rgba(255, 194, 75, 0.12);
      color: var(--gold);
      font-size: 19px;
      margin-bottom: 18px;
      border: 1px solid rgba(255, 194, 75, 0.18);
    }

    .tip-card h3 {
      font-size: 17px;
      margin-bottom: 10px;
    }

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

    .cta-panel {
      position: relative;
      overflow: hidden;
      border-radius: 24px;
      border: 1px solid rgba(46, 124, 255, 0.32);
      background: linear-gradient(135deg, rgba(46, 124, 255, 0.18), rgba(0, 224, 255, 0.06) 52%, rgba(10, 15, 30, 0.3));
      padding: 56px;
      text-align: center;
    }

    .cta-panel::before {
      content: "";
      position: absolute;
      top: -80px;
      left: 20%;
      width: 260px;
      height: 260px;
      background: rgba(46, 124, 255, 0.15);
      filter: blur(80px);
      border-radius: 50%;
    }

    .cta-panel h2 {
      font-size: 26px;
      margin-bottom: 14px;
      position: relative;
      z-index: 2;
    }

    .cta-panel p {
      max-width: 640px;
      margin: 0 auto 26px;
      color: #CDD5E6;
      position: relative;
      z-index: 2;
    }

    .cta-actions {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 14px;
      position: relative;
      z-index: 2;
    }

    .faq-panel {
      max-width: 920px;
    }

    .faq-panel .accordion-item {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.09);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
    }

    .faq-panel .accordion-button {
      background: transparent;
      color: var(--head);
      font-weight: 700;
      font-size: 16px;
      padding: 20px 24px;
      box-shadow: none;
      border: 0;
    }

    .faq-panel .accordion-button::after {
      background-image: none;
      content: "+";
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: rgba(0, 224, 255, 0.1);
      color: var(--accent);
      font-weight: 700;
      font-size: 18px;
      line-height: 1;
    }

    .faq-panel .accordion-button:not(.collapsed) {
      background: rgba(46, 124, 255, 0.09);
      color: var(--head);
      box-shadow: none;
    }

    .faq-panel .accordion-button:not(.collapsed)::after {
      background: rgba(0, 224, 255, 0.16);
      color: var(--accent);
      content: "−";
    }

    .faq-panel .accordion-button:focus {
      border: 0;
      box-shadow: inset 0 0 0 2px rgba(0, 224, 255, 0.35);
    }

    .faq-panel .accordion-body {
      background: transparent;
      color: var(--text);
      padding: 4px 24px 24px;
      border-top: 0;
      line-height: 1.85;
      font-size: 15px;
    }

    .site-footer {
      background: #070B16;
      border-top: 1px solid rgba(255, 255, 255, 0.07);
      padding: 60px 0 28px;
      margin-top: 30px;
    }

    .site-footer .container {
      max-width: 1320px;
      padding: 0 40px;
      margin: 0 auto;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.6fr 0.8fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      color: #fff;
      font-size: 20px;
      font-weight: 800;
      margin-bottom: 14px;
    }

    .footer-brand i {
      width: 36px;
      height: 36px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(140deg, rgba(46, 124, 255, 0.4), rgba(0, 224, 255, 0.18));
      color: #fff;
      border-radius: 10px;
    }

    .footer-desc {
      margin: 0;
      max-width: 420px;
      font-size: 14px;
      color: var(--muted);
      line-height: 1.8;
    }

    .footer-title {
      font-size: 15px;
      font-weight: 700;
      color: #D9E1F0;
      margin-bottom: 16px;
    }

    .footer-links {
      list-style: none;
      margin: 0;
      padding: 0;
      display: grid;
      gap: 10px;
    }

    .footer-links a {
      color: #8B95AC;
      font-size: 14px;
    }

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

    .footer-copyright {
      padding-top: 22px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 13px;
      color: rgba(120, 129, 154, 0.8);
      line-height: 1.7;
    }

    .footer-copy-col {
      opacity: 0.8;
    }

    @media (max-width: 991.98px) {
      .side-nav-wrap {
        position: sticky;
        top: 0;
        width: 100%;
        height: auto;
        min-height: 64px;
        flex-direction: row;
        align-items: center;
        padding: 8px 14px;
        border-right: 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        background: rgba(10, 15, 30, 0.92);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
      }

      .side-brand {
        padding: 0 14px 0 0;
        border-bottom: 0;
        flex-shrink: 0;
      }

      .side-logo {
        gap: 8px;
      }

      .logo-badge {
        width: 36px;
        height: 36px;
        font-size: 16px;
        border-radius: 10px;
      }

      .logo-text strong {
        font-size: 18px;
      }

      .logo-text small {
        display: none;
      }

      .side-nav {
        flex: 1;
        flex-direction: row;
        gap: 2px;
        padding: 0;
        overflow-x: auto;
        justify-content: flex-end;
        scrollbar-width: none;
      }

      .side-nav::-webkit-scrollbar {
        display: none;
      }

      .side-link {
        width: auto;
        height: 46px;
        padding: 0 12px;
        font-size: 14px;
        white-space: nowrap;
        border-radius: 10px;
      }

      .side-link.is-active {
        box-shadow: inset 0 -3px 0 var(--primary);
        background: rgba(46, 124, 255, 0.12);
      }

      .side-meta {
        display: none;
      }

      .page-shell {
        margin-left: 0;
      }

      .guide-banner {
        padding: 64px 0 84px;
      }

      .page-container,
      .banner-inner {
        padding: 0 24px;
      }

      .site-footer .container {
        padding: 0 24px;
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
      }
    }

    @media (max-width: 767.98px) {
      h1 {
        font-size: 38px;
      }

      h2 {
        font-size: 26px;
      }

      .content-section {
        padding: 58px 0;
      }

      .guide-banner {
        padding-top: 50px;
      }

      .banner-actions .btn-main,
      .banner-actions .btn-ghost {
        width: 100%;
      }

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

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

      .cta-panel {
        padding: 40px 22px;
      }

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

      .way-card {
        display: block;
      }

      .way-body {
        padding: 30px 20px 20px;
      }

      .data-table th,
      .data-table td {
        padding: 15px 14px;
        font-size: 14px;
      }
    }

    @media (max-width: 520px) {
      .side-nav-wrap {
        padding: 6px 8px;
        min-height: 56px;
      }

      .side-brand {
        padding: 0 6px 0 2px;
      }

      .logo-badge {
        display: none;
      }

      .logo-text strong {
        font-size: 17px;
      }

      .side-link {
        padding: 0 8px;
        font-size: 13px;
      }

      .side-link i {
        margin-right: 6px;
        font-size: 14px;
      }

      .page-container,
      .banner-inner {
        padding: 0 16px;
      }

      .site-footer .container {
        padding: 0 16px;
      }

      .guide-banner {
        padding: 40px 0 70px;
      }

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

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

      .step-grid {
        grid-template-columns: 1fr;
        gap: 14px;
      }

      .step-item {
        min-height: 0;
      }

      .cta-panel {
        padding: 32px 18px;
      }

      .cta-actions .btn-main,
      .cta-actions .btn-ghost {
        width: 100%;
        margin-bottom: 4px;
      }

      .banner-scroll {
        display: none;
      }
    }

/* roulang page: category3 */
:root {
      --bg: #0A0F1E;
      --bg-deep: #070B16;
      --bg-panel: #0E152A;
      --bg-soft: #101A35;
      --sidebar-bg: #0B1020;
      --primary: #2E7CFF;
      --cyan: #00E0FF;
      --gold: #FFC24B;
      --text: #F5F8FF;
      --body-text: #B8C0D4;
      --muted: #78819A;
      --border: rgba(255, 255, 255, 0.08);
      --border-light: rgba(255, 255, 255, 0.14);
      --glass: rgba(255, 255, 255, 0.04);
      --glass-deep: rgba(8, 12, 24, 0.72);
      --radius-lg: 18px;
      --radius-md: 14px;
      --radius-sm: 10px;
      --shadow: 0 10px 40px rgba(0, 10, 30, 0.28);
      --transition: all 0.28s ease;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      background: var(--bg);
      color: var(--body-text);
      font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Inter", sans-serif;
      font-size: 15px;
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, h5, h6 {
      color: var(--text);
      font-weight: 700;
      line-height: 1.3;
      margin-top: 0;
    }

    p {
      margin-top: 0;
    }

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

    img {
      max-width: 100%;
      height: auto;
    }

    button,
    input {
      font-family: inherit;
    }

    :focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: 3px;
      border-radius: 4px;
    }

    /* layout */
    .app-shell {
      min-height: 100vh;
    }

    .sidebar {
      position: fixed;
      top: 0;
      left: 0;
      bottom: 0;
      width: 248px;
      z-index: 1030;
      background: var(--sidebar-bg);
      border-right: 1px solid var(--border);
      padding: 26px 18px 20px;
      display: flex;
      flex-direction: column;
    }

    .sidebar-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 0 10px 22px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      margin-bottom: 16px;
    }

    .brand-icon {
      width: 38px;
      height: 38px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--primary), var(--cyan));
      color: #fff;
      font-size: 18px;
      box-shadow: 0 0 18px rgba(46, 124, 255, 0.35);
    }

    .brand-text {
      color: var(--text);
      font-size: 20px;
      font-weight: 800;
      letter-spacing: 0.02em;
    }

    .brand-text small {
      display: block;
      color: var(--muted);
      font-size: 11px;
      font-weight: 500;
      letter-spacing: 0.08em;
      margin-top: 2px;
    }

    .sidebar-label {
      font-size: 12px;
      letter-spacing: 0.14em;
      color: var(--muted);
      text-transform: uppercase;
      padding: 14px 12px 8px;
      margin: 0;
    }

    .side-nav {
      display: flex;
      flex-direction: column;
      gap: 5px;
    }

    .side-link {
      position: relative;
      display: flex;
      align-items: center;
      gap: 12px;
      height: 46px;
      padding: 0 14px;
      border-radius: 12px;
      color: var(--body-text);
      font-size: 15px;
      font-weight: 500;
    }

    .side-link i {
      width: 20px;
      text-align: center;
      color: #8c94ab;
      transition: var(--transition);
    }

    .side-link:hover {
      background: var(--glass);
      color: var(--text);
    }

    .side-link:hover i {
      color: var(--cyan);
    }

    .side-link.is-active {
      background: linear-gradient(90deg, rgba(46, 124, 255, 0.18), rgba(46, 124, 255, 0.02));
      color: var(--text);
      font-weight: 600;
    }

    .side-link.is-active::before {
      content: "";
      position: absolute;
      left: -18px;
      top: 9px;
      bottom: 9px;
      width: 3px;
      border-radius: 0 4px 4px 0;
      background: var(--primary);
      box-shadow: 0 0 14px var(--primary);
    }

    .side-link.is-active i {
      color: var(--cyan);
    }

    .sidebar-support {
      margin-top: auto;
      border-radius: 16px;
      background: rgba(255, 255, 255, 0.025);
      border: 1px solid var(--border);
      padding: 16px;
    }

    .sidebar-support strong {
      color: var(--text);
      display: block;
      margin-bottom: 4px;
      font-size: 14px;
    }

    .sidebar-support span {
      color: var(--muted);
      font-size: 13px;
    }

    .sidebar-support a {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--cyan);
      font-size: 13px;
      margin-top: 8px;
    }

    /* main area */
    .main-content {
      margin-left: 248px;
      min-height: 100vh;
      background: var(--bg);
      display: flex;
      flex-direction: column;
    }

    .content-shell {
      flex: 1;
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding-left: 42px;
      padding-right: 42px;
    }

    /* hero */
    .category-hero {
      position: relative;
      min-height: 430px;
      padding: 80px 0 64px;
      background-image: linear-gradient(100deg, rgba(7, 11, 22, 0.96) 0%, rgba(7, 11, 22, 0.74) 55%, rgba(7, 11, 22, 0.42) 100%), url('/assets/images/backpic/back-3.webp');
      background-size: cover;
      background-position: center;
      display: flex;
      align-items: center;
      border-bottom: 1px solid var(--border);
    }

    .hero-panel {
      background: rgba(16, 26, 53, 0.62);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: 22px;
      padding: 38px 42px;
      max-width: 760px;
      box-shadow: 0 18px 60px rgba(0, 0, 0, 0.34);
      position: relative;
      overflow: hidden;
    }

    .hero-panel::before {
      content: "";
      position: absolute;
      left: 0;
      top: 0;
      height: 3px;
      width: 180px;
      background: linear-gradient(90deg, var(--primary), var(--cyan));
      border-radius: 4px;
    }

    .hero-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--cyan);
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      margin-bottom: 18px;
    }

    .hero-kicker i {
      font-size: 15px;
    }

    .hero-panel h1 {
      font-size: 44px;
      font-weight: 800;
      letter-spacing: 0.01em;
      margin-bottom: 16px;
    }

    .hero-panel .hero-lead {
      color: #d6dcec;
      font-size: 16px;
      max-width: 620px;
      margin-bottom: 24px;
    }

    .hero-chip-row {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 22px;
    }

    .hero-chip {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      background: rgba(255, 255, 255, 0.07);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: 999px;
      padding: 7px 13px;
      color: #e5eaf6;
      font-size: 13px;
    }

    .hero-chip i {
      color: var(--gold);
    }

    /* buttons */
    .btn-brand {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      height: 46px;
      padding: 0 24px;
      border: none;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--primary), #1b5edb);
      color: #fff;
      font-weight: 600;
      box-shadow: 0 6px 24px rgba(46, 124, 255, 0.32);
      transition: var(--transition);
    }

    .btn-brand:hover {
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 10px 30px rgba(46, 124, 255, 0.46);
    }

    .btn-brand:active {
      transform: translateY(0);
      box-shadow: 0 4px 14px rgba(46, 124, 255, 0.3);
    }

    .btn-ghost {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      height: 46px;
      padding: 0 24px;
      border: 1px solid var(--border-light);
      border-radius: 12px;
      background: rgba(255, 255, 255, 0.02);
      color: var(--text);
      font-weight: 600;
      transition: var(--transition);
    }

    .btn-ghost:hover {
      border-color: var(--primary);
      color: var(--cyan);
      background: rgba(46, 124, 255, 0.06);
    }

    .btn-ghost i {
      color: var(--primary);
    }

    /* section */
    .section {
      padding: 76px 0;
    }

    .section-alt {
      background: rgba(16, 26, 53, 0.32);
    }

    .section-soft {
      background: var(--bg-panel);
    }

    .section-head {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 24px;
      margin-bottom: 30px;
    }

    .section-head.left {
      align-items: flex-start;
      flex-direction: column;
    }

    .section-kicker {
      color: var(--cyan);
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 0.08em;
      margin-bottom: 8px;
      display: inline-block;
      text-transform: uppercase;
    }

    .section-head h2 {
      font-size: 32px;
      font-weight: 800;
      margin-bottom: 0;
    }

    .section-head p {
      margin: 0;
      max-width: 720px;
      color: var(--muted);
    }

    /* compat section */
    .compat-grid {
      display: grid;
      grid-template-columns: 1.05fr 0.95fr;
      gap: 52px;
      align-items: center;
    }

    .compat-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-top: 24px;
    }

    .compat-item {
      display: flex;
      gap: 14px;
      padding: 16px 18px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border);
      border-radius: 14px;
      transition: var(--transition);
    }

    .compat-item:hover {
      background: rgba(46, 124, 255, 0.06);
      border-color: rgba(46, 124, 255, 0.3);
    }

    .compat-icon {
      flex: 0 0 38px;
      width: 38px;
      height: 38px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 10px;
      background: rgba(0, 224, 255, 0.1);
      color: var(--cyan);
      font-size: 16px;
    }

    .compat-item strong {
      color: var(--text);
      display: block;
      font-size: 15px;
    }

    .compat-item span {
      color: var(--muted);
      font-size: 14px;
    }

    .media-frame {
      position: relative;
      border-radius: 20px;
      overflow: hidden;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow);
    }

    .media-frame img {
      width: 100%;
      aspect-ratio: 4 / 3;
      object-fit: cover;
      display: block;
    }

    .media-float-card {
      position: absolute;
      right: 18px;
      bottom: 18px;
      background: rgba(10, 15, 30, 0.78);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      border: 1px solid rgba(255, 255, 255, 0.14);
      border-radius: 14px;
      padding: 14px 16px;
      color: var(--text);
      font-size: 13px;
      box-shadow: 0 12px 34px rgba(0, 0, 0, 0.4);
    }

    .media-float-card i {
      color: var(--gold);
      margin-right: 6px;
    }

    /* steps */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }

    .step-card {
      background: rgba(255, 255, 255, 0.035);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 26px 22px;
      height: 100%;
      transition: var(--transition);
    }

    .step-card:hover {
      transform: translateY(-5px);
      border-color: rgba(46, 124, 255, 0.34);
      background: rgba(46, 124, 255, 0.05);
      box-shadow: var(--shadow);
    }

    .step-num {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: rgba(0, 224, 255, 0.1);
      border: 1px solid rgba(0, 224, 255, 0.25);
      color: var(--cyan);
      font-weight: 700;
      margin-bottom: 18px;
    }

    .step-card h3 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-card p {
      font-size: 14px;
      color: var(--muted);
      margin: 0;
    }

    /* resource downloads */
    .resource-stack {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

    .resource-card {
      display: grid;
      grid-template-columns: 150px 1fr auto;
      gap: 22px;
      align-items: center;
      background: rgba(255, 255, 255, 0.035);
      border: 1px solid var(--border);
      border-radius: 18px;
      padding: 16px;
      transition: var(--transition);
    }

    .resource-card:hover {
      border-color: rgba(46, 124, 255, 0.4);
      background: rgba(46, 124, 255, 0.04);
      box-shadow: var(--shadow);
    }

    .resource-thumb {
      width: 150px;
      height: 100px;
      border-radius: 12px;
      overflow: hidden;
    }

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

    .resource-info h3 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .resource-info p {
      color: var(--muted);
      font-size: 14px;
      margin: 0 0 8px;
    }

    .resource-meta {
      display: flex;
      gap: 6px;
      font-size: 12px;
      color: var(--body-text);
    }

    .tag-light {
      background: rgba(0, 224, 255, 0.12);
      color: var(--cyan);
      padding: 3px 10px;
      border-radius: 999px;
      display: inline-block;
    }

    .tag-gold {
      background: rgba(255, 194, 75, 0.14);
      color: var(--gold);
      padding: 3px 10px;
      border-radius: 999px;
      display: inline-block;
    }

    .resource-action .btn-brand,
    .resource-action .btn-ghost {
      height: 40px;
      padding: 0 18px;
      white-space: nowrap;
    }

    /* version table */
    .version-wrap {
      border: 1px solid var(--border);
      border-radius: 18px;
      overflow: hidden;
      background: rgba(255, 255, 255, 0.025);
      box-shadow: var(--shadow);
    }

    .version-table {
      width: 100%;
      border-collapse: collapse;
    }

    .version-table th,
    .version-table td {
      padding: 18px 22px;
      text-align: left;
      border-bottom: 1px solid rgba(255, 255, 255, 0.07);
      font-size: 14px;
    }

    .version-table th {
      background: rgba(46, 124, 255, 0.08);
      color: var(--text);
      font-weight: 600;
      letter-spacing: 0.04em;
      font-size: 13px;
    }

    .version-table td {
      color: var(--body-text);
    }

    .version-table td strong {
      color: var(--text);
    }

    .version-table tr:last-child td {
      border-bottom: 0;
    }

    /* faq */
    .faq-wrap {
      max-width: 920px;
      margin: 0 auto;
    }

    .accordion-item {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border);
      border-radius: 16px !important;
      overflow: hidden;
      margin-bottom: 14px;
    }

    .accordion-item:last-child {
      margin-bottom: 0;
    }

    .accordion-button {
      background: transparent;
      color: var(--text);
      font-weight: 600;
      font-size: 16px;
      padding: 20px 22px;
      box-shadow: none;
      transition: var(--transition);
    }

    .accordion-button:not(.collapsed) {
      background: rgba(46, 124, 255, 0.1);
      color: #fff;
      box-shadow: none;
    }

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

    .accordion-button::after {
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2300E0FF' viewBox='0 0 16 16'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
      transition: var(--transition);
    }

    .accordion-button:not(.collapsed)::after {
      transform: rotate(180deg);
    }

    .accordion-body {
      color: var(--body-text);
      padding: 0 22px 20px;
      background: transparent;
      font-size: 15px;
    }

    /* cta */
    .cta-section {
      position: relative;
      margin-top: 70px;
      border-radius: 24px;
      overflow: hidden;
      background-image: linear-gradient(110deg, rgba(46, 124, 255, 0.24), rgba(10, 15, 30, 0.6)), url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      padding: 52px 48px;
      text-align: center;
      color: #fff;
      border: 1px solid var(--border-light);
    }

    .cta-section h2 {
      color: #fff;
      font-size: 30px;
      font-weight: 800;
      margin-bottom: 8px;
    }

    .cta-section p {
      color: #e0e7f7;
      font-size: 15px;
      margin-bottom: 22px;
    }

    .cta-actions {
      display: flex;
      justify-content: center;
      gap: 12px;
      flex-wrap: wrap;
    }

    /* footer */
    .site-footer {
      background: var(--bg-deep);
      border-top: 1px solid var(--border);
      padding: 60px 0 0;
      margin-top: 80px;
    }

    .site-footer .container {
      max-width: 1240px;
      padding-left: 40px;
      padding-right: 40px;
      margin: 0 auto;
    }

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

    .footer-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      color: var(--text);
      font-size: 20px;
      font-weight: 800;
    }

    .footer-brand i {
      color: var(--cyan);
      font-size: 24px;
    }

    .footer-desc {
      color: var(--muted);
      font-size: 14px;
      margin-top: 14px;
      max-width: 420px;
    }

    .footer-title {
      color: var(--text);
      font-weight: 600;
      margin-bottom: 16px;
      font-size: 15px;
    }

    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a {
      color: var(--body-text);
      font-size: 14px;
    }

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

    .footer-copyright {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding: 22px 0;
      color: var(--muted);
      font-size: 13px;
      text-align: center;
    }

    /* mobile header */
    .mobile-header {
      display: none;
      position: sticky;
      top: 0;
      z-index: 1090;
      background: rgba(7, 11, 22, 0.88);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border);
      align-items: center;
      justify-content: space-between;
      padding: 12px 20px;
    }

    .mobile-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      color: var(--text);
      font-weight: 800;
      font-size: 18px;
    }

    .mobile-brand .brand-icon {
      width: 30px;
      height: 30px;
      border-radius: 8px;
      font-size: 14px;
    }

    .mobile-toggle {
      border: 1px solid var(--border-light);
      background: rgba(255, 255, 255, 0.04);
      border-radius: 10px;
      color: var(--text);
      width: 40px;
      height: 40px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 17px;
    }

    .mobile-panel {
      background: var(--bg-deep);
      border-bottom: 1px solid var(--border);
      padding: 10px 18px 14px;
    }

    .mobile-panel a {
      display: flex;
      align-items: center;
      gap: 12px;
      height: 44px;
      padding: 0 12px;
      color: var(--body-text);
      border-radius: 10px;
    }

    .mobile-panel a.is-active {
      color: var(--cyan);
      background: rgba(46, 124, 255, 0.1);
    }

    .mobile-panel a i {
      width: 20px;
      text-align: center;
    }

    /* backtop */
    .back-top {
      position: fixed;
      right: 24px;
      bottom: 24px;
      z-index: 1080;
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: rgba(46, 124, 255, 0.85);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      box-shadow: 0 8px 26px rgba(46, 124, 255, 0.35);
      opacity: 0;
      visibility: hidden;
      transform: translateY(12px);
      transition: var(--transition);
    }

    .back-top.show {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }

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

    /* bootstrap smoothing */
    .btn {
      border-radius: 12px;
      font-weight: 600;
    }

    /* responsiveness */
    @media (max-width: 1200px) {
      .hero-panel {
        padding: 32px 30px;
      }

      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

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

      .mobile-header {
        display: flex;
      }

      .main-content {
        margin-left: 0;
        padding-top: 0;
      }

      .content-shell {
        padding-left: 24px;
        padding-right: 24px;
      }

      .category-hero {
        padding: 54px 0 42px;
        min-height: 0;
      }

      .compat-grid {
        grid-template-columns: 1fr;
        gap: 36px;
      }

      .resource-card {
        grid-template-columns: 118px 1fr;
      }

      .resource-action {
        grid-column: 1 / -1;
        display: flex;
        justify-content: flex-end;
      }

      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .site-footer .container {
        padding-left: 24px;
        padding-right: 24px;
      }

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

    @media (max-width: 767.98px) {
      .section {
        padding: 50px 0;
      }

      .category-hero {
        padding: 42px 0 36px;
      }

      .content-shell {
        padding-left: 18px;
        padding-right: 18px;
      }

      .hero-panel {
        padding: 28px 22px;
        border-radius: 18px;
      }

      .hero-panel h1 {
        font-size: 34px;
      }

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

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

      .steps-grid {
        grid-template-columns: 1fr;
        gap: 14px;
      }

      .resource-card {
        grid-template-columns: 1fr;
        padding: 14px;
      }

      .resource-thumb {
        width: 100%;
        height: 170px;
      }

      .version-table th,
      .version-table td {
        padding: 12px 14px;
        font-size: 13px;
      }

      .cta-section {
        padding: 36px 22px;
        border-radius: 18px;
      }

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

      .site-footer {
        margin-top: 52px;
        padding-top: 40px;
      }

      .section-head {
        flex-direction: column;
        align-items: flex-start;
      }

      .back-top {
        right: 16px;
        bottom: 16px;
      }
    }

    @media (max-width: 520px) {
      .hero-chip-row {
        gap: 8px;
      }

      .hero-chip {
        font-size: 12px;
        padding: 5px 10px;
      }

      .btn-brand,
      .btn-ghost {
        width: 100%;
        margin-bottom: 8px;
      }

      .cta-actions .btn-brand,
      .cta-actions .btn-ghost {
        width: auto;
        flex: 1;
        min-width: 150px;
      }
    }