/* roulang page: index */
/* ========== design variables ========== */
:root {
  --bg-primary: #0A1A2F;
  --bg-secondary: #0D2036;
  --bg-card: rgba(255,255,255,0.06);
  --bg-input: rgba(255,255,255,0.08);
  --border-card: rgba(255,255,255,0.10);
  --accent: #00C8FF;
  --accent-deep: #0072FF;
  --gold: #FFB800;
  --gold-deep: #FF8A00;
  --text-title: #F0F6FF;
  --text-body: #A8B8CC;
  --text-muted: #60758D;
  --nav-bg: #FFFFFF;
  --nav-text: #1A2A3A;
  --nav-muted: #5A6B7C;
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.30);
  --shadow-glow: 0 12px 48px rgba(0,200,255,0.12);
  --container-w: 1200px;
  --font-stack: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

/* ========== reset & base ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font-stack);
  background: var(--bg-primary);
  color: var(--text-body);
  line-height: 1.8;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s ease;
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}
ul, ol {
  list-style: none;
}
input, textarea {
  font-family: inherit;
}
h1, h2, h3, h4 {
  line-height: 1.3;
  color: var(--text-title);
  font-weight: 600;
}

/* ========== container ========== */
.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 500;
  padding: 12px 28px;
  border-radius: var(--radius-btn);
  transition: all 0.3s ease;
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  color: #FFFFFF;
  box-shadow: 0 0 24px rgba(0,200,255,0.4);
  position: relative;
  overflow: hidden;
}
.btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: 0 6px 32px rgba(0,200,255,0.55);
}
.btn-primary:active {
  filter: brightness(0.9);
  transform: translateY(0);
}
.btn-primary::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.25), transparent);
  transform: skewX(-20deg);
  transition: left 0.5s ease;
}
.btn-primary:hover::after {
  left: 150%;
}
.btn-outline {
  background: rgba(255,255,255,0.10);
  color: var(--text-title);
  border: 1px solid rgba(255,255,255,0.5);
  backdrop-filter: blur(4px);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.20);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}
.btn-outline:active {
  transform: translateY(0);
}
.btn-light {
  background: #FFFFFF;
  color: var(--nav-text);
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}
.btn-light:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0,200,255,0.25);
}
a.text-link {
  color: var(--accent);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.3s ease;
}
a.text-link:hover {
  gap: 10px;
  color: var(--text-title);
}

/* ========== header & nav ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--nav-bg);
  color: var(--nav-text);
  z-index: 1000;
  border-bottom: 1px solid rgba(0,0,0,0.06);
  box-shadow: 0 1px 12px rgba(0,0,0,0.08);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  font-size: 20px;
  box-shadow: 0 4px 12px rgba(0,200,255,0.3);
}
.brand-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--nav-text);
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-list a {
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--nav-muted);
  border-radius: var(--radius-btn);
  position: relative;
  transition: all 0.3s ease;
}
.nav-list a::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-deep));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}
.nav-list a:hover {
  color: var(--nav-text);
}
.nav-list a:hover::after,
.nav-list a.active::after {
  transform: scaleX(1);
}
.nav-list a.active {
  color: var(--nav-text);
  font-weight: 600;
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.search-box {
  position: relative;
  display: flex;
  align-items: center;
}
.search-box input {
  width: 190px;
  padding: 9px 36px 9px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(0,0,0,0.10);
  background: #F5F7FA;
  font-size: 14px;
  color: var(--nav-text);
  transition: all 0.3s ease;
  outline: none;
}
.search-box input::placeholder {
  color: #9AACBB;
}
.search-box input:focus {
  border-color: var(--accent);
  background: #FFFFFF;
  box-shadow: 0 0 0 3px rgba(0,200,255,0.15);
  width: 210px;
}
.search-box i {
  position: absolute;
  right: 14px;
  color: #9AACBB;
  font-size: 14px;
  pointer-events: none;
}
.nav-cta {
  padding: 9px 22px;
  font-size: 14px;
}
.hamburger {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  align-items: center;
  justify-content: center;
  background: #F5F7FA;
  color: var(--nav-text);
  font-size: 18px;
}
.mobile-menu {
  display: none;
  background: var(--nav-bg);
  padding: 0 24px;
  border-top: 1px solid rgba(0,0,0,0.06);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.mobile-menu.open {
  max-height: 400px;
}
.mobile-menu a {
  display: block;
  padding: 14px 8px;
  font-size: 16px;
  font-weight: 500;
  color: var(--nav-text);
  border-bottom: 1px solid rgba(0,0,0,0.05);
}
.mobile-menu a:last-child {
  border-bottom: none;
}
.mobile-menu a.active {
  color: var(--accent-deep);
}

/* ========== hero ========== */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  margin-top: 72px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,26,47,0.85) 20%, rgba(10,26,47,0.65) 60%, rgba(13,32,54,0.85) 100%);
}
.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}
.hero-glow.g1 {
  width: 400px;
  height: 400px;
  top: 10%;
  right: -80px;
  background: rgba(0,200,255,0.08);
}
.hero-glow.g2 {
  width: 300px;
  height: 300px;
  bottom: 10%;
  left: -60px;
  background: rgba(255,184,0,0.05);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
  padding: 60px 24px;
  margin: 0 auto;
  text-align: left;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  border-radius: var(--radius-pill);
  background: rgba(0,200,255,0.12);
  border: 1px solid rgba(0,200,255,0.3);
  color: var(--accent);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 20px;
  backdrop-filter: blur(4px);
}
.hero-content h1 {
  font-size: 44px;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: 1px;
}
.hero-content h1 span {
  background: linear-gradient(90deg, var(--accent), var(--gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 20px;
  color: var(--text-body);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 620px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.hero-stats {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}
.hero-stats .stat-item {
  text-align: left;
}
.hero-stats .stat-num {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-title);
  display: block;
}
.hero-stats .stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 2px;
}
.scroll-down {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  color: rgba(255,255,255,0.5);
  font-size: 20px;
  animation: bounceDown 2s infinite;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.15);
  background: rgba(255,255,255,0.05);
  transition: all 0.3s ease;
}
.scroll-down:hover {
  color: var(--accent);
  border-color: var(--accent);
}
@keyframes bounceDown {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ========== section common ========== */
.section {
  padding: 96px 0;
  position: relative;
}
.section-bg-alt {
  background: var(--bg-secondary);
}
.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}
.section-head .section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  padding: 4px 16px;
  border-radius: var(--radius-pill);
  background: rgba(0,200,255,0.10);
  margin-bottom: 12px;
}
.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-title);
}
.section-head p {
  font-size: 16px;
  color: var(--text-muted);
}

/* ========== features ========== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  padding: 32px 24px;
  border-radius: var(--radius-card);
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
  transition: all 0.35s ease;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 24px;
  right: 24px;
  height: 1px;
  background: linear-gradient(90deg, rgba(0,200,255,0.5), transparent);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
  border-color: rgba(0,200,255,0.25);
}
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(0,200,255,0.2), rgba(0,114,255,0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 22px;
  margin-bottom: 16px;
}
.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-title);
}
.feature-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ========== split section ========== */
.split-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: stretch;
}
.split-block {
  padding: 40px;
  border-radius: var(--radius-card);
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  box-shadow: var(--shadow-card);
  transition: all 0.35s ease;
}
.split-block:hover {
  border-color: rgba(0,200,255,0.25);
  box-shadow: var(--shadow-glow);
}
.split-block .block-img {
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 28px;
  height: 200px;
  background-size: cover;
  background-position: center;
}
.split-block .block-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.split-block:hover .block-img img {
  transform: scale(1.03);
}
.split-block h3 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 8px;
}
.split-block > p {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.split-block ul li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  color: var(--text-body);
  padding: 6px 0;
}
.split-block ul li i {
  color: var(--accent);
  margin-top: 4px;
  font-size: 14px;
  flex-shrink: 0;
}
.split-more {
  margin-top: 16px;
}

/* ========== scenarios ========== */
.scenarios-grid {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 48px;
  align-items: center;
}
.scenario-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.scenario-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 24px;
  border-radius: var(--radius-btn);
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  font-size: 16px;
  font-weight: 500;
  color: var(--text-body);
  transition: all 0.3s ease;
  cursor: default;
}
.scenario-item i {
  color: var(--accent);
  font-size: 18px;
}
.scenario-item:hover {
  border-color: var(--accent);
  color: var(--text-title);
  transform: translateX(6px);
  box-shadow: 0 4px 20px rgba(0,200,255,0.1);
}
.scenario-img-wrap {
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  position: relative;
}
.scenario-img-wrap::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-card);
}
.scenario-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 380px;
}

/* ========== cases ========== */
.case-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}
.case-stat-card {
  text-align: center;
  padding: 28px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-card);
  transition: all 0.3s ease;
}
.case-stat-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255,184,0,0.3);
}
.case-stat-card .num {
  font-size: 36px;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.2;
}
.case-stat-card .num i {
  font-size: 24px;
  color: var(--gold);
  font-style: normal;
}
.case-stat-card .label {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 6px;
}
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all 0.35s ease;
}
.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
  border-color: rgba(0,200,255,0.25);
}
.case-thumb {
  position: relative;
  height: 180px;
  overflow: hidden;
}
.case-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.case-card:hover .case-thumb img {
  transform: scale(1.05);
}
.case-thumb .case-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: rgba(10,26,47,0.7);
  border: 1px solid rgba(255,255,255,0.15);
  color: var(--text-title);
  font-size: 12px;
  backdrop-filter: blur(4px);
}
.case-body {
  padding: 20px 24px 24px;
}
.case-body h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
}
.case-body p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ========== pricing ========== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}
.pricing-card {
  position: relative;
  padding: 40px 32px;
  border-radius: var(--radius-card);
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  box-shadow: var(--shadow-card);
  transition: all 0.35s ease;
  display: flex;
  flex-direction: column;
}
.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
  border-color: rgba(0,200,255,0.25);
}
.pricing-card.featured {
  border-color: rgba(255,184,0,0.4);
  box-shadow: 0 12px 48px rgba(255,184,0,0.08);
}
.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--gold), var(--gold-deep));
  color: #FFFFFF;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 16px;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 12px rgba(255,184,0,0.3);
}
.pricing-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-title);
  margin-bottom: 4px;
}
.pricing-desc {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.pricing-price {
  font-size: 40px;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.2;
  margin-bottom: 4px;
}
.pricing-price small {
  font-size: 14px;
  font-weight: 400;
  color: var(--text-muted);
}
.pricing-unit {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.pricing-features {
  flex-grow: 1;
  margin-bottom: 28px;
}
.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-body);
  padding: 6px 0;
}
.pricing-features li i {
  color: var(--accent);
  font-size: 13px;
  margin-top: 5px;
}
.pricing-features li.disabled {
  color: #3A4A5C;
}
.pricing-features li.disabled i {
  color: #3A4A5C;
}
.pricing-card .btn {
  width: 100%;
}

/* ========== news / cms ========== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all 0.35s ease;
}
.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
  border-color: rgba(0,200,255,0.25);
}
.news-thumb {
  height: 180px;
  background-size: cover;
  background-position: center;
  position: relative;
}
.news-thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(10,26,47,0.5));
}
.news-body {
  padding: 20px 24px 24px;
  position: relative;
}
.news-cat {
  display: inline-block;
  font-size: 12px;
  color: var(--accent);
  background: rgba(0,200,255,0.1);
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 10px;
  font-weight: 500;
}
.news-body h3 {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 8px;
  color: var(--text-title);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-body > p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.news-time {
  font-size: 13px;
  color: var(--text-muted);
}
.news-more {
  font-size: 13px;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.3s ease;
}
.news-card:hover .news-more {
  gap: 8px;
}
.news-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 24px;
  background: var(--bg-card);
  border: 1px dashed var(--border-card);
  border-radius: var(--radius-card);
  color: var(--text-muted);
}
.news-empty .empty-icon {
  font-size: 42px;
  display: block;
  margin-bottom: 12px;
  opacity: 0.6;
}

/* ========== faq ========== */
.faq-wrap {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-card);
  margin-bottom: 16px;
  overflow: hidden;
  transition: border-color 0.3s ease;
}
.faq-item.active {
  border-color: rgba(0,200,255,0.3);
}
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 24px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-title);
  text-align: left;
  background: transparent;
  transition: color 0.3s ease;
}
.faq-q:hover {
  color: var(--accent);
}
.faq-q .faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border-card);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
  color: var(--text-muted);
  transition: all 0.3s ease;
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
  border-color: var(--accent);
  color: var(--accent);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 24px;
  color: var(--text-body);
  font-size: 15px;
  line-height: 1.8;
}
.faq-item.active .faq-a {
  max-height: 300px;
  padding: 0 24px 24px;
}

/* ========== ctq band ========== */
.cta-band {
  background: linear-gradient(135deg, rgba(0,200,255,0.12), rgba(0,114,255,0.06));
  border-top: 1px solid rgba(0,200,255,0.15);
  border-bottom: 1px solid rgba(0,200,255,0.15);
  padding: 72px 0;
  text-align: center;
}
.cta-band h2 {
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 12px;
}
.cta-band p {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 32px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ========== footer ========== */
.site-footer {
  background: #081524;
  padding: 64px 0 24px;
  border-top: 1px solid rgba(255,255,255,0.04);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  margin-bottom: 40px;
}
.footer-brand .brand-text {
  color: var(--text-title);
  font-size: 22px;
  margin-bottom: 12px;
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 300px;
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-title);
  margin-bottom: 18px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul a {
  font-size: 14px;
  color: var(--text-muted);
  transition: all 0.3s ease;
}
.footer-col ul a:hover {
  color: var(--accent);
  padding-left: 4px;
}
.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.footer-contact i {
  color: var(--accent);
  margin-top: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.04);
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
  color: #3A4A5C;
}
.footer-bottom a {
  color: #4A5A6C;
}
.footer-bottom a:hover {
  color: var(--accent);
}

/* ========== back to top ========== */
.back-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  box-shadow: 0 4px 20px rgba(0,200,255,0.4);
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: all 0.3s ease;
  z-index: 999;
}
.back-top.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.back-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(0,200,255,0.5);
}

/* ========== responsive ========== */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .case-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-card.featured {
    order: -1;
  }
  .pricing-card:last-child {
    grid-column: 1 / -1;
  }
  .scenarios-grid {
    grid-template-columns: 1fr;
  }
  .split-grid {
    grid-template-columns: 1fr;
  }
  .nav-list {
    display: none;
  }
  .search-box {
    display: none;
  }
  .hamburger {
    display: flex;
  }
  .mobile-menu {
    display: block;
  }
  .hero-content h1 {
    font-size: 34px;
  }
}
@media (max-width: 768px) {
  .section {
    padding: 56px 0;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .case-grid {
    grid-template-columns: 1fr;
  }
  .case-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .pricing-card.featured {
    order: 0;
  }
  .pricing-card:last-child {
    grid-column: auto;
  }
  .news-grid {
    grid-template-columns: 1fr;
  }
  .hero {
    min-height: auto;
    padding: 60px 0 80px;
  }
  .hero-content h1 {
    font-size: 28px;
  }
  .hero-sub {
    font-size: 17px;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .section-head h2 {
    font-size: 22px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .cta-band h2 {
    font-size: 24px;
  }
  .back-top {
    bottom: 20px;
    right: 20px;
  }
}
@media (max-width: 520px) {
  .brand-text {
    font-size: 17px;
  }
  .nav-cta {
    display: none;
  }
  .hero-content h1 {
    font-size: 24px;
  }
  .case-stats {
    grid-template-columns: 1fr 1fr;
  }
  .split-block {
    padding: 24px;
  }
  .pricing-card {
    padding: 28px 20px;
  }
}

/* roulang page: category1 */
:root {
  --bg-primary: #0A1A2F;
  --bg-secondary: #0D2036;
  --bg-footer: #081524;
  --accent: #00C8FF;
  --accent-dark: #0072FF;
  --accent-gold: #FFB800;
  --text-heading: #F0F6FF;
  --text-body: #A8B8CC;
  --text-muted: #60758D;
  --card-bg: rgba(255,255,255,0.06);
  --card-border: rgba(255,255,255,0.10);
  --card-border-hover: rgba(0,200,255,0.25);
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.30);
  --shadow-hover: 0 12px 48px rgba(0,200,255,0.12);
  --font-main: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --container: 1200px;
  --spacing-section: 96px;
  --spacing-mobile: 56px;
  --nav-height: 72px;
}
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  color: var(--text-body);
  line-height: 1.8;
  font-size: 15px;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; transition: color 0.3s ease; }
a:hover { color: #fff; }
ul, ol { list-style: none; }
button, input { font-family: inherit; font-size: inherit; border: none; outline: none; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  line-height: 1.4;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, #00C8FF, #0072FF);
  color: #fff;
  box-shadow: 0 0 24px rgba(0,200,255,0.4);
  position: relative;
  overflow: hidden;
}
.btn-primary:hover {
  color: #fff;
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: 0 0 36px rgba(0,200,255,0.55);
}
.btn-primary:active { filter: brightness(0.9); transform: translateY(0); }
.btn-primary::after {
  content: "";
  position: absolute;
  top: 0;
  left: -80%;
  width: 50%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.35), transparent);
  transform: skewX(-20deg);
  transition: left 0.5s ease;
}
.btn-primary:hover::after { left: 130%; }
.btn-outline {
  background: rgba(255,255,255,0.10);
  color: var(--text-heading);
  border: 1px solid rgba(255,255,255,0.30);
  backdrop-filter: blur(8px);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.20);
  color: #fff;
  border-color: rgba(255,255,255,0.5);
  transform: translateY(-2px);
}
.btn-outline:active { transform: translateY(0); filter: brightness(0.9); }
.btn-sm { padding: 10px 22px; font-size: 14px; }
.btn-lg { padding: 16px 40px; font-size: 16px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #FFFFFF;
  box-shadow: 0 1px 8px rgba(0,0,0,0.06);
  height: var(--nav-height);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  gap: 20px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, #00C8FF, #0072FF);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
  box-shadow: 0 4px 14px rgba(0,200,255,0.35);
}
.brand-text {
  font-size: 18px;
  font-weight: 700;
  color: #1A2A3A;
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-list a {
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 500;
  color: #1A2A3A;
  border-radius: 8px;
  position: relative;
  transition: color 0.3s, background 0.3s;
  white-space: nowrap;
}
.nav-list a::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #00C8FF, #0072FF);
  border-radius: 2px;
  transition: width 0.3s ease;
}
.nav-list a:hover { color: #0072FF; }
.nav-list a:hover::after { width: 24px; }
.nav-list a.active {
  color: #0072FF;
  background: rgba(0,200,255,0.08);
}
.nav-list a.active::after { width: 24px; }
.header-tools {
  display: flex;
  align-items: center;
  gap: 12px;
}
.header-search {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #F2F5F9;
  border-radius: var(--radius-pill);
  padding: 8px 16px;
  width: 200px;
  transition: border-color 0.3s, box-shadow 0.3s;
  border: 1px solid transparent;
}
.header-search:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,200,255,0.15);
}
.header-search i { color: var(--text-muted); font-size: 14px; }
.header-search input {
  border: none;
  background: transparent;
  font-size: 14px;
  color: #1A2A3A;
  width: 100%;
}
.header-search input::placeholder { color: #9AA8B8; }
.hamburger {
  display: none;
  background: transparent;
  font-size: 22px;
  color: #1A2A3A;
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  transition: background 0.3s;
}
.hamburger:hover { background: #F2F5F9; }
.mobile-nav {
  display: none;
  background: #FFFFFF;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  z-index: 999;
  box-shadow: 0 8px 24px rgba(0,0,0,0.10);
  padding: 12px 24px 20px;
  border-top: 1px solid #EEEFF3;
}
.mobile-nav.open { display: block; }
.mobile-nav a {
  display: block;
  padding: 14px 8px;
  font-size: 16px;
  font-weight: 500;
  color: #1A2A3A;
  border-bottom: 1px solid #F2F5F9;
}
.mobile-nav a:last-child { border-bottom: none; }
.mobile-nav a.active { color: #0072FF; font-weight: 600; }
.mobile-nav a:hover { background: #F8FAFC; }

/* Hero */
.page-hero {
  position: relative;
  min-height: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 0 100px;
  background:
    radial-gradient(ellipse 600px 300px at 85% 20%, rgba(0,200,255,0.10), transparent),
    radial-gradient(ellipse 500px 280px at 15% 80%, rgba(255,184,0,0.05), transparent),
    linear-gradient(to bottom, rgba(10,26,47,0.72), rgba(10,26,47,0.88)),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 18px;
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.18);
  color: var(--accent);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 1px;
  margin-bottom: 24px;
  backdrop-filter: blur(6px);
}
.hero-content h1 {
  font-size: 44px;
  font-weight: 700;
  color: var(--text-heading);
  line-height: 1.3;
  margin-bottom: 18px;
  letter-spacing: 1px;
}
.hero-subtitle {
  font-size: 18px;
  color: var(--text-body);
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}
.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.scroll-arrow {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.55);
  font-size: 18px;
  animation: floatDown 2.2s ease-in-out infinite;
  transition: color 0.3s;
  z-index: 2;
}
.scroll-arrow:hover { color: var(--accent); }
@keyframes floatDown {
  0%, 100% { transform: translate(-50%, 0); opacity: 0.9; }
  50% { transform: translate(-50%, 10px); opacity: 0.5; }
}

/* Sections */
.section {
  padding: var(--spacing-section) 0;
  background: var(--bg-primary);
  position: relative;
}
.section-alt {
  background: var(--bg-secondary);
}
.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}
.section-tag {
  display: inline-block;
  padding: 4px 16px;
  border-radius: var(--radius-pill);
  background: rgba(0,200,255,0.10);
  border: 1px solid rgba(0,200,255,0.25);
  color: var(--accent);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-heading);
  line-height: 1.3;
  margin-bottom: 14px;
}
.section-head p {
  font-size: 15px;
  color: var(--text-body);
  line-height: 1.8;
}

/* Tier Cards (Full-Width Vertical) */
.tier-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.tier-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 32px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-card);
  padding: 40px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(10px);
  transition: all 0.35s ease;
  position: relative;
  overflow: hidden;
}
.tier-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 40px;
  right: 40px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,200,255,0.5), transparent);
  opacity: 0;
  transition: opacity 0.35s ease;
}
.tier-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--card-border-hover);
}
.tier-card:hover::before { opacity: 1; }
.tier-icon-box {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  flex-shrink: 0;
  background: linear-gradient(135deg, rgba(0,200,255,0.15), rgba(0,114,255,0.15));
  border: 1px solid rgba(0,200,255,0.25);
  color: var(--accent);
}
.tier-card:nth-child(2) .tier-icon-box {
  background: linear-gradient(135deg, rgba(255,184,0,0.15), rgba(255,138,0,0.10));
  border-color: rgba(255,184,0,0.30);
  color: var(--accent-gold);
}
.tier-card:nth-child(3) .tier-icon-box {
  background: linear-gradient(135deg, rgba(120,140,180,0.18), rgba(60,80,120,0.12));
  border-color: rgba(180,200,255,0.28);
  color: #B8CCFF;
}
.tier-info {
  flex: 1;
  min-width: 260px;
}
.tier-info h3 {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: 6px;
}
.tier-badge {
  display: inline-block;
  padding: 3px 14px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 500;
  margin-bottom: 12px;
  background: rgba(255,255,255,0.10);
  border: 1px solid rgba(255,255,255,0.16);
  color: var(--text-body);
}
.tier-card:nth-child(2) .tier-badge {
  background: linear-gradient(135deg, rgba(255,184,0,0.18), rgba(255,138,0,0.12));
  border-color: rgba(255,184,0,0.30);
  color: #FFD166;
}
.tier-card:nth-child(3) .tier-badge {
  background: linear-gradient(135deg, rgba(120,140,200,0.18), rgba(80,100,160,0.12));
  border-color: rgba(160,190,255,0.30);
  color: #B8CCFF;
}
.tier-info p {
  font-size: 15px;
  color: var(--text-body);
  line-height: 1.8;
  margin-bottom: 14px;
}
.tier-features {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.tier-features span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.10);
  font-size: 13px;
  color: var(--text-body);
}
.tier-features i { color: var(--accent); font-size: 12px; }
.tier-action {
  flex-shrink: 0;
}

/* Benefit Cards (Full-Width Alternating) */
.benefit-list {
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.benefit-card {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(10px);
  transition: all 0.35s ease;
}
.benefit-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--card-border-hover);
}
.benefit-media {
  flex: 0 0 320px;
  min-height: 240px;
  position: relative;
  overflow: hidden;
}
.benefit-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.benefit-card:hover .benefit-media img { transform: scale(1.04); }
.benefit-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,26,47,0.35), transparent);
}
.benefit-content {
  flex: 1;
  min-width: 280px;
  padding: 36px 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.benefit-content .benefit-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  background: linear-gradient(135deg, rgba(0,200,255,0.15), rgba(0,114,255,0.15));
  border: 1px solid rgba(0,200,255,0.25);
  color: var(--accent);
  margin-bottom: 18px;
}
.benefit-content h3 {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: 10px;
}
.benefit-content p {
  font-size: 15px;
  color: var(--text-body);
  line-height: 1.8;
  margin-bottom: 16px;
}
.benefit-content ul li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 6px 0;
  font-size: 14px;
  color: var(--text-body);
}
.benefit-content ul li i {
  color: var(--accent);
  font-size: 14px;
  margin-top: 5px;
  flex-shrink: 0;
}
.benefit-card:nth-child(even) .benefit-media { order: 2; }
.benefit-card:nth-child(even) .benefit-content { order: 1; }

/* Scenarios */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.scenario-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-card);
  padding: 32px 28px;
  text-align: center;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(10px);
  transition: all 0.35s ease;
  position: relative;
  overflow: hidden;
}
.scenario-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  transition: width 0.4s ease;
}
.scenario-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--card-border-hover);
}
.scenario-card:hover::before { width: 70%; }
.scenario-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, rgba(0,200,255,0.12), rgba(0,114,255,0.12));
  border: 1px solid rgba(0,200,255,0.22);
  color: var(--accent);
}
.scenario-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: 10px;
}
.scenario-card p {
  font-size: 14px;
  color: var(--text-body);
  line-height: 1.8;
}

/* Process */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}
.process-steps::before {
  content: "";
  position: absolute;
  top: 40px;
  left: 12%;
  right: 12%;
  height: 1px;
  background: linear-gradient(90deg, rgba(0,200,255,0.4), rgba(0,114,255,0.15), rgba(0,200,255,0.4));
  opacity: 0.35;
}
.process-step {
  text-align: center;
  padding: 0 12px;
  position: relative;
}
.process-num {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 24px;
  font-weight: 700;
  color: var(--accent);
  background: var(--bg-primary);
  border: 2px solid rgba(0,200,255,0.40);
  box-shadow: 0 0 30px rgba(0,200,255,0.12);
  position: relative;
  z-index: 2;
  transition: all 0.35s ease;
}
.process-step:hover .process-num {
  background: linear-gradient(135deg, #00C8FF, #0072FF);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 0 36px rgba(0,200,255,0.35);
}
.process-step h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: 8px;
}
.process-step p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
}
.faq-item:hover { border-color: rgba(0,200,255,0.20); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 28px;
  cursor: pointer;
  user-select: none;
  transition: background 0.3s;
}
.faq-question:hover { background: rgba(255,255,255,0.03); }
.faq-question span {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-heading);
  line-height: 1.5;
}
.faq-toggle {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  background: rgba(0,200,255,0.10);
  color: var(--accent);
  border: 1px solid rgba(0,200,255,0.25);
  flex-shrink: 0;
  transition: transform 0.3s ease, background 0.3s;
}
.faq-item.active .faq-toggle {
  transform: rotate(45deg);
  background: linear-gradient(135deg, #00C8FF, #0072FF);
  color: #fff;
  border-color: transparent;
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 28px;
  color: var(--text-body);
  font-size: 14px;
  line-height: 1.8;
}
.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 28px 22px;
}

/* CTA */
.cta-section {
  padding: 80px 0;
  background:
    radial-gradient(ellipse 500px 260px at 50% 0%, rgba(0,200,255,0.10), transparent),
    var(--bg-secondary);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 80px 80px;
  pointer-events: none;
}
.cta-inner {
  position: relative;
  z-index: 2;
  max-width: 680px;
  margin: 0 auto;
  padding: 0 24px;
}
.cta-inner h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-heading);
  line-height: 1.3;
  margin-bottom: 16px;
}
.cta-inner p {
  font-size: 16px;
  color: var(--text-body);
  line-height: 1.8;
  margin-bottom: 36px;
}
.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* Footer */
.site-footer {
  background: var(--bg-footer);
  padding: 64px 0 0;
  border-top: 1px solid rgba(255,255,255,0.05);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-brand .brand-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 14px;
  display: block;
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 320px;
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: 18px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul li a {
  font-size: 14px;
  color: var(--text-muted);
  transition: color 0.3s, padding-left 0.3s;
}
.footer-col ul li a:hover {
  color: var(--accent);
  padding-left: 4px;
}
.footer-contact li {
  font-size: 14px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer-contact i {
  color: var(--accent);
  font-size: 14px;
  width: 18px;
  text-align: center;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.05);
  padding: 20px 24px;
  text-align: center;
}
.footer-bottom p {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.6;
}
.footer-bottom a {
  color: var(--text-muted);
}
.footer-bottom a:hover { color: var(--accent); }

/* Responsive */
@media (max-width: 1024px) {
  :root { --spacing-section: 72px; }
  .nav-list { display: none; }
  .header-search { display: none; }
  .hamburger { display: block; }
  .header-tools .btn-sm { display: none; }
  .benefit-media { flex-basis: 280px; }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); gap: 40px; }
  .process-steps::before { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  :root { --spacing-section: 56px; }
  .hero-content h1 { font-size: 28px; }
  .hero-subtitle { font-size: 16px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .hero-actions .btn { width: 100%; max-width: 320px; }
  .section-head h2 { font-size: 22px; }
  .section-head p { font-size: 14px; }
  .scroll-arrow { display: none; }
  .tier-card { flex-direction: column; align-items: flex-start; padding: 28px 24px; gap: 20px; }
  .tier-icon-box { width: 56px; height: 56px; font-size: 22px; border-radius: 14px; }
  .tier-info h3 { font-size: 20px; }
  .tier-action { width: 100%; }
  .tier-action .btn { width: 100%; }
  .benefit-card { flex-direction: column; }
  .benefit-media { flex-basis: auto; height: 220px; }
  .benefit-card:nth-child(even) .benefit-media { order: 0; }
  .benefit-card:nth-child(even) .benefit-content { order: 0; }
  .benefit-content { padding: 28px 24px; }
  .scenario-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; gap: 32px; }
  .cta-inner h2 { font-size: 24px; }
  .cta-actions { flex-direction: column; align-items: center; }
  .cta-actions .btn { width: 100%; max-width: 320px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .page-hero { min-height: 400px; padding: 64px 0 80px; }
}
@media (min-width: 1200px) {
  .container { padding: 0 24px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* roulang page: article */
:root{
  --primary:#00C8FF;
  --primary-dark:#0072FF;
  --accent:#FFB800;
  --accent-dark:#FF8A00;
  --bg-dark:#0A1A2F;
  --bg-dark-alt:#0D2036;
  --bg-footer:#081524;
  --card-bg:rgba(255,255,255,0.06);
  --card-border:rgba(255,255,255,0.10);
  --text-title:#F0F6FF;
  --text-body:#A8B8CC;
  --text-muted:#60758D;
  --nav-bg:#FFFFFF;
  --nav-text:#1A2A3A;
  --font-stack:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --radius:16px;
  --radius-btn:10px;
  --radius-tag:999px;
  --shadow-card:0 8px 32px rgba(0,0,0,0.30);
  --shadow-hover:0 12px 48px rgba(0,200,255,0.12);
  --container-w:1200px;
  --space-section:96px;
  --space-section-mobile:56px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font-stack);background:var(--bg-dark);color:var(--text-body);line-height:1.8;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none;transition:color .2s ease}
a:hover{color:#66dbff}
button,input,textarea{font-family:inherit}
.container{max-width:var(--container-w);margin:0 auto;padding:0 24px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;cursor:pointer;font-size:15px;font-weight:600;border-radius:var(--radius-btn);padding:12px 28px;transition:all .25s ease;text-decoration:none;line-height:1.4}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;box-shadow:0 0 24px rgba(0,200,255,0.35)}
.btn-primary:hover{filter:brightness(1.12);transform:translateY(-2px);box-shadow:0 0 36px rgba(0,200,255,0.45)}
.btn-primary:active{transform:translateY(0);filter:brightness(.9)}
.btn-primary:focus-visible{outline:3px solid rgba(0,200,255,0.5);outline-offset:3px}
.btn-ghost{background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.35);color:#F0F6FF}
.btn-ghost:hover{background:rgba(255,255,255,0.16);border-color:rgba(255,255,255,0.6);color:#fff}
.btn-sm{padding:9px 20px;font-size:14px}
.btn-lg{padding:16px 40px;font-size:17px}

body::before{content:'';position:fixed;top:-220px;right:-200px;width:620px;height:620px;background:radial-gradient(circle,rgba(0,200,255,0.07),transparent 70%);pointer-events:none;z-index:0}
body::after{content:'';position:fixed;bottom:-220px;left:-200px;width:620px;height:620px;background:radial-gradient(circle,rgba(255,184,0,0.045),transparent 70%);pointer-events:none;z-index:0}

.site-header{position:sticky;top:0;z-index:100;background:var(--nav-bg);box-shadow:0 1px 8px rgba(0,0,0,0.08);height:72px;border-bottom:1px solid rgba(0,0,0,0.04)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:100%;gap:20px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;text-decoration:none}
.brand-icon{display:flex;align-items:center;justify-content:center;width:34px;height:34px;flex-shrink:0}
.brand-text{font-size:20px;font-weight:700;color:var(--nav-text);white-space:nowrap;letter-spacing:0.5px}
.nav-list{display:flex;align-items:center;gap:6px}
.nav-list a{display:inline-block;padding:8px 16px;font-size:15px;font-weight:500;color:var(--nav-text);border-radius:8px;position:relative;text-decoration:none;transition:background .2s,color .2s}
.nav-list a:hover{background:rgba(0,200,255,0.07);color:#0072FF}
.nav-list a.active{color:var(--primary-dark);font-weight:600}
.nav-list a.active::after{content:'';position:absolute;left:16px;right:16px;bottom:2px;height:2px;background:linear-gradient(90deg,var(--primary),var(--primary-dark));border-radius:2px}
.header-actions{display:flex;align-items:center;gap:14px;flex-shrink:0}
.search-box{position:relative;display:flex;align-items:center}
.search-box i{position:absolute;left:14px;font-size:14px;color:#8aa0b5;pointer-events:none}
.search-box input{width:200px;height:40px;border:1px solid #e3e7ec;border-radius:var(--radius-btn);background:#F5F7FA;padding:0 14px 0 38px;font-size:14px;color:#1A2A3A;transition:border-color .2s,box-shadow .2s,background .2s}
.search-box input::placeholder{color:#8aa0b5}
.search-box input:focus{outline:none;border-color:var(--primary);background:#fff;box-shadow:0 0 0 3px rgba(0,200,255,0.18)}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:10px;border-radius:8px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--nav-text);margin:5px auto;transition:transform .3s,opacity .3s}
.nav-toggle:hover{background:#f0f2f5}
.nav-toggle:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.nav-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.article-cover{position:relative;background:linear-gradient(135deg,rgba(10,26,47,0.92),rgba(13,32,54,0.85)),url('/assets/images/backpic/back-1.png') center/cover;padding:44px 0 52px;overflow:hidden;border-bottom:1px solid rgba(255,255,255,0.06)}
.article-cover::before{content:'';position:absolute;top:-90px;right:-90px;width:340px;height:340px;background:radial-gradient(circle,rgba(0,200,255,0.14),transparent 70%);pointer-events:none}
.article-cover::after{content:'';position:absolute;bottom:-50px;left:-50px;width:220px;height:220px;background:radial-gradient(circle,rgba(255,184,0,0.07),transparent 70%);pointer-events:none}
.breadcrumb{position:relative;z-index:2;display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-muted);margin-bottom:32px;flex-wrap:wrap}
.breadcrumb a{color:var(--primary);text-decoration:none;transition:color .2s}
.breadcrumb a:hover{color:#66dbff}
.breadcrumb .sep{color:rgba(255,255,255,0.3)}
.breadcrumb .current{max-width:340px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--text-body)}
.article-head{position:relative;z-index:2;max-width:860px}
.article-cat-badge{display:inline-flex;align-items:center;gap:6px;padding:5px 16px;border-radius:var(--radius-tag);background:linear-gradient(135deg,rgba(0,200,255,0.18),rgba(0,114,255,0.12));border:1px solid rgba(0,200,255,0.35);color:var(--primary);font-size:13px;font-weight:600;margin-bottom:14px}
.article-head h1{font-size:38px;font-weight:700;color:var(--text-title);line-height:1.3;margin-bottom:16px;letter-spacing:0.5px}
.article-subtitle{font-size:17px;color:var(--text-muted);line-height:1.7;margin-top:8px}
.article-meta{display:flex;align-items:center;gap:24px;color:var(--text-muted);font-size:13px;flex-wrap:wrap}
.article-meta span{display:inline-flex;align-items:center;gap:7px}
.article-meta i{color:var(--primary)}

.article-section{padding:56px 0 80px;position:relative;z-index:1}
.article-section .container{max-width:860px}
.article-body{background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius);padding:48px;box-shadow:var(--shadow-card);position:relative}
.article-body::before{content:'';position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,rgba(0,200,255,0.4),rgba(255,255,255,0.03),rgba(255,184,0,0.2));border-radius:var(--radius) var(--radius) 0 0}
.article-body h2{font-size:24px;font-weight:700;color:var(--text-title);margin:36px 0 16px;padding-bottom:10px;border-bottom:1px solid rgba(255,255,255,0.07);line-height:1.4}
.article-body h3{font-size:19px;font-weight:600;color:var(--text-title);margin:28px 0 12px;line-height:1.4}
.article-body h4{font-size:16px;font-weight:600;color:var(--text-title);margin:24px 0 10px}
.article-body p{margin-bottom:16px;font-size:15px;color:var(--text-body);line-height:1.85}
.article-body a{color:var(--primary);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:#66dbff}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:26px}
.article-body li{margin-bottom:8px;font-size:15px;line-height:1.8}
.article-body li::marker{color:var(--primary)}
.article-body blockquote{border-left:4px solid var(--primary);background:rgba(0,200,255,0.06);padding:18px 22px;margin:22px 0;border-radius:0 12px 12px 0;color:var(--text-title);font-size:15px;line-height:1.8}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body pre{background:#081524;border:1px solid rgba(255,255,255,0.08);border-radius:10px;padding:18px;overflow-x:auto;margin:22px 0;font-size:13px;line-height:1.7}
.article-body code{font-family:'SFMono-Regular',Consolas,'Courier New',monospace;background:rgba(255,255,255,0.08);padding:2px 7px;border-radius:4px;font-size:13px;color:#cfe3ff}
.article-body pre code{background:transparent;padding:0;color:#e2ecf5}
.article-body img{border-radius:12px;margin:26px auto;max-height:480px;object-fit:contain}
.article-body hr{border:none;height:1px;background:rgba(255,255,255,0.08);margin:30px 0}
.article-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:14px}
.article-body th,.article-body td{border:1px solid rgba(255,255,255,0.12);padding:10px 14px;text-align:left}
.article-body th{background:rgba(0,200,255,0.1);color:var(--text-title);font-weight:600}
.article-body td{color:var(--text-body)}

.article-tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:36px;padding-top:26px;border-top:1px solid rgba(255,255,255,0.07)}
.tag{display:inline-block;padding:5px 16px;border-radius:var(--radius-tag);border:1px solid rgba(255,255,255,0.18);background:rgba(255,255,255,0.04);color:var(--text-muted);font-size:12px;text-decoration:none;transition:all .2s}
.tag:hover{border-color:var(--primary);color:var(--primary)}
.article-pagination{display:flex;gap:16px;margin-top:30px}
.article-pagination a{flex:1;display:flex;align-items:center;gap:12px;padding:16px 20px;background:rgba(255,255,255,0.04);border:1px solid rgba(255,255,255,0.08);border-radius:12px;color:var(--text-body);text-decoration:none;transition:all .25s;min-width:0}
.article-pagination a:hover{border-color:rgba(0,200,255,0.35);background:rgba(0,200,255,0.06);transform:translateY(-2px)}
.article-pagination .page-text{display:flex;flex-direction:column;gap:2px;min-width:0}
.article-pagination .page-text span{font-size:12px;color:var(--text-muted)}
.article-pagination .page-text strong{font-size:14px;color:var(--text-title);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.article-pagination a i{color:var(--primary);flex-shrink:0;font-size:16px}
.article-pagination .page-next{justify-content:flex-end;text-align:right}

.back-to-list{margin-top:28px;text-align:center}
.back-to-list a{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--text-muted);text-decoration:none;transition:color .2s}
.back-to-list a:hover{color:var(--primary)}

.content-not-found{text-align:center;padding:50px 20px;min-height:260px;display:flex;flex-direction:column;align-items:center;justify-content:center}
.content-not-found i{font-size:44px;color:rgba(0,200,255,0.5);margin-bottom:18px}
.content-not-found h2{font-size:26px;color:var(--text-title);margin-bottom:12px}
.content-not-found p{color:var(--text-muted);font-size:15px;max-width:400px;margin-bottom:26px}

.related-section{background:var(--bg-dark-alt);padding:80px 0;border-top:1px solid rgba(255,255,255,0.06);border-bottom:1px solid rgba(255,255,255,0.06);position:relative;z-index:1}
.section-head{text-align:center;margin-bottom:44px}
.section-head h2{font-size:32px;font-weight:700;color:var(--text-title);line-height:1.3;margin-bottom:10px}
.section-head p{font-size:15px;color:var(--text-muted);max-width:480px;margin:0 auto}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.related-card{display:block;background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius);overflow:hidden;text-decoration:none;transition:all .3s ease;position:relative}
.related-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(0,200,255,0.25)}
.related-card img{width:100%;height:168px;object-fit:cover;transition:transform .4s ease}
.related-card:hover img{transform:scale(1.04)}
.related-card .related-body{padding:18px 20px 22px}
.related-card .related-title{font-size:16px;font-weight:600;color:var(--text-title);line-height:1.5;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.related-card:hover .related-title{color:var(--primary)}
.related-card .related-meta{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--text-muted)}
.related-card .related-meta i{font-size:11px}

.cta-section{padding:72px 0;text-align:center;background:linear-gradient(135deg,rgba(0,200,255,0.07),rgba(13,32,54,0.4)),var(--bg-dark);position:relative;z-index:1;border-bottom:1px solid rgba(255,255,255,0.06)}
.cta-section h2{font-size:32px;font-weight:700;color:var(--text-title);margin-bottom:14px;line-height:1.3}
.cta-section p{font-size:16px;color:var(--text-muted);max-width:560px;margin:0 auto 30px}
.cta-section .btn{margin:0 auto}

.site-footer{background:var(--bg-footer);padding:64px 0 0;position:relative;z-index:1;color:var(--text-muted)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.footer-brand .brand-text{font-size:22px;font-weight:700;color:#F0F6FF;margin-bottom:16px;display:flex;align-items:center;gap:10px}
.footer-brand p{font-size:14px;line-height:1.8;margin-top:12px;max-width:340px}
.footer-col h4{font-size:16px;font-weight:600;color:#F0F6FF;margin-bottom:16px}
.footer-col ul{list-style:none;padding:0}
.footer-col li{margin-bottom:10px}
.footer-col a{color:var(--text-muted);font-size:14px;text-decoration:none;transition:color .2s}
.footer-col a:hover{color:var(--primary)}
.footer-contact li{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text-muted)}
.footer-contact i{color:var(--primary);font-size:14px;width:18px;text-align:center}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding:20px 0;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13px}
.footer-bottom a{color:var(--text-muted);text-decoration:none}
.footer-bottom a:hover{color:var(--primary)}

@media (max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .header-actions .search-box{display:none}
}
@media (max-width:768px){
  :root{--space-section:56px}
  .header-inner{gap:10px}
  .nav-toggle{display:block}
  .nav-list{position:fixed;top:72px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:12px 0;box-shadow:0 12px 32px rgba(0,0,0,0.12);transform:translateY(-120%);transition:transform .35s ease;border-bottom:1px solid rgba(0,0,0,0.06)}
  .nav-list.open{transform:translateY(0)}
  .nav-list a{padding:12px 24px;font-size:15px;border-radius:0;border-bottom:1px solid rgba(0,0,0,0.04)}
  .nav-list a.active{background:rgba(0,200,255,0.06)}
  .nav-list a.active::after{display:none}
  .header-actions .btn{display:none}
  .article-cover{padding:32px 0 40px}
  .article-head h1{font-size:28px}
  .article-body{padding:28px 22px}
  .article-body h2{font-size:21px}
  .article-body h3{font-size:17px}
  .article-meta{gap:14px}
  .article-pagination{flex-direction:column}
  .article-pagination a{justify-content:center}
  .related-grid{grid-template-columns:1fr}
  .cta-section h2{font-size:26px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;text-align:center;justify-content:center}
  .section-head h2{font-size:24px}
  .breadcrumb{margin-bottom:20px}
}
@media (max-width:520px){
  .brand-text{font-size:17px}
  .article-head h1{font-size:24px}
  .article-body{padding:20px 16px}
  .article-body p,.article-body li{font-size:14px}
  .article-meta span{font-size:12px}
  .cta-section p{font-size:14px}
  .section-head h2{font-size:22px}
  .related-card .related-title{font-size:15px}
}

/* roulang page: category2 */
:root {
  --bg-primary: #0A1A2F;
  --bg-secondary: #0D2036;
  --bg-footer: #081524;
  --accent: #00C8FF;
  --accent-dark: #0072FF;
  --accent-2: #FFB800;
  --accent-2-dark: #FF8A00;
  --card-bg: rgba(255,255,255,0.06);
  --card-border: rgba(255,255,255,0.10);
  --text-title: #F0F6FF;
  --text-body: #A8B8CC;
  --text-muted: #60758D;
  --nav-bg: #FFFFFF;
  --nav-text: #1A2A3A;
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-tag: 999px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.30);
  --shadow-hover: 0 12px 48px rgba(0,200,255,0.12);
  --transition: all 0.3s ease;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg-primary);
  color: var(--text-body);
  line-height: 1.8;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
button { cursor: pointer; font-family: inherit; }
input { font-family: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; position: relative; }
.section-alt { background: var(--bg-secondary); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head h2 { font-size: 32px; font-weight: 700; color: var(--text-title); line-height: 1.3; margin-bottom: 12px; }
.section-head p { font-size: 15px; color: var(--text-body); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; height: 48px; padding: 0 28px;
  border-radius: var(--radius-btn); font-size: 15px; font-weight: 600;
  border: none; transition: var(--transition); white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff; box-shadow: 0 0 24px rgba(0,200,255,0.35);
}
.btn-primary:hover { filter: brightness(1.1); transform: translateY(-2px); box-shadow: 0 8px 32px rgba(0,200,255,0.45); }
.btn-primary:active { filter: brightness(0.9); transform: translateY(0); }
.btn-outline {
  background: rgba(255,255,255,0.08); color: var(--text-title);
  border: 1px solid rgba(255,255,255,0.30);
}
.btn-outline:hover { background: rgba(255,255,255,0.16); border-color: var(--accent); }
.btn-outline:active { background: rgba(255,255,255,0.05); }
.btn-sm { height: 40px; padding: 0 20px; font-size: 14px; }

/* Card tags & badges */
.card-tag {
  display: inline-flex; align-items: center;
  padding: 4px 14px; border-radius: var(--radius-tag);
  background: rgba(0,200,255,0.12); border: 1px solid rgba(0,200,255,0.30);
  color: var(--accent); font-size: 12px; font-weight: 500;
  letter-spacing: 0.3px;
}
.badge-hot {
  background: linear-gradient(135deg, var(--accent-2), var(--accent-2-dark));
  color: #1A2A3A; padding: 3px 10px; border-radius: var(--radius-tag);
  font-size: 12px; font-weight: 700;
}

/* Header / Nav */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: var(--nav-bg); height: 72px;
  border-bottom: 1px solid rgba(26,42,58,0.08);
  box-shadow: 0 1px 12px rgba(26,42,58,0.06);
}
.nav-wrap { display: flex; align-items: center; height: 72px; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-icon {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 17px;
  box-shadow: 0 4px 16px rgba(0,200,255,0.35);
}
.brand-text { font-size: 18px; font-weight: 700; color: var(--nav-text); letter-spacing: 0.3px; }
.nav-list { display: flex; align-items: center; gap: 28px; flex: 1; }
.nav-list a {
  font-size: 15px; font-weight: 500; color: #6A7A8A;
  position: relative; padding: 8px 2px;
}
.nav-list a::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 0; height: 2px; border-radius: 2px;
  background: var(--accent); transition: width 0.3s;
}
.nav-list a:hover { color: var(--nav-text); }
.nav-list a:hover::after, .nav-list a.active::after { width: 100%; }
.nav-list a.active { color: var(--nav-text); font-weight: 600; }
.nav-right { display: flex; align-items: center; gap: 16px; }
.nav-search {
  display: flex; align-items: center; gap: 8px;
  background: #F3F6FA; border: 1px solid #E3E9F0;
  border-radius: 999px; padding: 8px 16px; width: 200px;
}
.nav-search input {
  border: none; outline: none; background: transparent;
  font-size: 13px; color: var(--nav-text); width: 100%;
}
.nav-search i { color: #9AABBC; font-size: 13px; }
.nav-toggle { display: none; background: none; border: none; font-size: 22px; color: var(--nav-text); }

/* Mobile nav drawer */
@media (max-width: 1024px) {
  .nav-list {
    position: fixed; top: 72px; left: 0; right: 0;
    background: var(--nav-bg); flex-direction: column;
    align-items: flex-start; gap: 0; padding: 12px 24px 24px;
    border-bottom: 1px solid rgba(26,42,58,0.08);
    box-shadow: 0 16px 32px rgba(26,42,58,0.10);
    transform: translateY(-130%); transition: transform 0.3s ease;
  }
  .nav-list.open { transform: translateY(0); }
  .nav-list a { width: 100%; padding: 14px 0; border-bottom: 1px solid #EFF3F7; }
  .nav-list a:last-child { border-bottom: none; }
  .nav-toggle { display: block; margin-left: auto; }
  .nav-right { display: none; }
}

/* Page Hero */
.page-hero {
  position: relative; padding: 168px 0 96px;
  background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
}
.page-hero::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(10,26,47,0.75) 30%, rgba(10,26,47,0.85) 70%);
}
.page-hero::after {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(600px 300px at 85% 20%, rgba(0,200,255,0.18), transparent 70%),
    radial-gradient(500px 320px at 15% 80%, rgba(255,184,0,0.10), transparent 70%);
  pointer-events: none;
}
.page-hero .container { position: relative; z-index: 2; }
.hero-tag {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--accent); font-size: 14px; font-weight: 600;
  background: rgba(0,200,255,0.10); border: 1px solid rgba(0,200,255,0.25);
  padding: 6px 16px; border-radius: 999px; margin-bottom: 20px;
  letter-spacing: 1px;
}
.page-hero h1 {
  font-size: 44px; font-weight: 700; color: var(--text-title);
  line-height: 1.25; margin-bottom: 18px; max-width: 640px;
}
.page-hero .hero-sub {
  font-size: 18px; color: rgba(168,184,204,0.9);
  max-width: 600px; margin-bottom: 32px; line-height: 1.7;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-scroll {
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
  color: rgba(255,255,255,0.6); font-size: 20px; z-index: 2;
  animation: bounce 2s infinite;
}
@keyframes bounce { 0%,100%{transform:translate(-50%,0)} 50%{transform:translate(-50%,12px)} }

/* Vertical Cards */
.vertical-card-list { display: flex; flex-direction: column; gap: 32px; }
.vertical-card {
  display: flex; align-items: stretch; border-radius: var(--radius-card);
  background: var(--card-bg); border: 1px solid var(--card-border);
  box-shadow: var(--shadow-card); overflow: hidden;
  transition: var(--transition); position: relative;
}
.vertical-card::before {
  content: ""; position: absolute; top: 0; left: 24px; right: 24px;
  height: 1px; background: linear-gradient(90deg, transparent, rgba(0,200,255,0.5), transparent);
}
.vertical-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(0,200,255,0.25);
}
.vertical-card-media { width: 46%; min-height: 300px; overflow: hidden; }
.vertical-card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
.vertical-card:hover .vertical-card-media img { transform: scale(1.03); }
.vertical-card-body {
  width: 54%; padding: 40px 48px; display: flex; flex-direction: column;
  justify-content: center; gap: 14px;
}
.vertical-card-body h3 { font-size: 22px; font-weight: 600; color: var(--text-title); line-height: 1.3; }
.vertical-card-body p { font-size: 15px; line-height: 1.8; color: var(--text-body); }
.vertical-card-list ul { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 8px 16px; margin-top: 4px; }
.vertical-card-list ul li {
  display: flex; align-items: center; gap: 8px;
  font-size: 14px; color: var(--text-body);
}
.vertical-card-list ul li i { color: var(--accent); font-size: 13px; }
.vertical-card.flip .vertical-card-media { order: 2; }
.vertical-card.flip .vertical-card-body { order: 1; }

/* Level Cards */
.level-list { display: flex; flex-direction: column; gap: 24px; }
.level-card {
  display: flex; align-items: center; gap: 32px;
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: var(--radius-card); padding: 36px 44px;
  transition: var(--transition); position: relative;
}
.level-card:hover { transform: translateY(-3px); border-color: rgba(0,200,255,0.25); box-shadow: var(--shadow-hover); }
.level-icon {
  width: 64px; height: 64px; border-radius: 18px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px; color: var(--accent);
  background: rgba(0,200,255,0.10); border: 1px solid rgba(0,200,255,0.20);
}
.level-card.highlight .level-icon {
  background: linear-gradient(135deg, rgba(255,184,0,0.2), rgba(255,138,0,0.1));
  border-color: rgba(255,184,0,0.30); color: var(--accent-2);
}
.level-info { flex: 1; }
.level-info h3 { font-size: 20px; font-weight: 600; color: var(--text-title); margin-bottom: 6px; }
.level-info p { font-size: 14px; color: var(--text-body); line-height: 1.7; }
.level-badge { flex-shrink: 0; }
.level-features {
  display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px;
}
.level-features span {
  font-size: 12px; color: var(--text-body);
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.08);
  padding: 4px 12px; border-radius: 999px;
}

/* Feature Rows */
.feature-rows { display: flex; flex-direction: column; gap: 0; max-width: 860px; margin: 0 auto; }
.feature-row {
  display: flex; align-items: flex-start; gap: 24px;
  padding: 32px 0; border-bottom: 1px solid rgba(255,255,255,0.06);
}
.feature-row:last-child { border-bottom: none; }
.feature-icon {
  width: 54px; height: 54px; border-radius: 14px; flex-shrink: 0;
  background: linear-gradient(135deg, rgba(0,200,255,0.16), rgba(0,114,255,0.08));
  border: 1px solid rgba(0,200,255,0.20);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent); font-size: 20px;
}
.feature-text h3 { font-size: 18px; font-weight: 600; color: var(--text-title); margin-bottom: 6px; }
.feature-text p { font-size: 14px; color: var(--text-body); line-height: 1.7; max-width: 600px; }

/* Journey Timeline */
.step-timeline { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
.step-timeline::before {
  content: ""; position: absolute; top: 36px; left: 10%; right: 10%;
  height: 2px; background: linear-gradient(90deg, var(--accent), rgba(0,200,255,0.2));
  border-radius: 2px;
}
.step-item { text-align: center; position: relative; padding: 0 8px; }
.step-num {
  width: 72px; height: 72px; border-radius: 50%;
  background: var(--bg-primary); border: 2px solid var(--accent);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 18px; font-size: 22px; font-weight: 700; color: var(--accent);
  position: relative; z-index: 2; box-shadow: 0 0 20px rgba(0,200,255,0.25);
}
.step-item h4 { font-size: 17px; font-weight: 600; color: var(--text-title); margin-bottom: 8px; }
.step-item p { font-size: 13px; color: var(--text-muted); line-height: 1.6; }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
.faq-item {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: var(--radius-card); overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: rgba(0,200,255,0.20); }
.faq-item details { padding: 0 28px; }
.faq-item summary {
  list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between;
  padding: 24px 0; font-size: 16px; font-weight: 600; color: var(--text-title);
  transition: var(--transition);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary i { color: var(--accent); font-size: 18px; transition: transform 0.3s ease; }
.faq-item details[open] summary i { transform: rotate(45deg); }
.faq-item .faq-body { padding: 0 0 24px; font-size: 14px; color: var(--text-body); line-height: 1.8; }

/* CTA Section */
.cta-section { position: relative; padding: 96px 0; text-align: center; }
.cta-section::before {
  content: ""; position: absolute; inset: 0;
  background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  opacity: 0.5;
}
.cta-section .container { position: relative; z-index: 2; }
.cta-section h2 { font-size: 34px; font-weight: 700; color: var(--text-title); margin-bottom: 16px; }
.cta-section p { font-size: 16px; color: var(--text-body); max-width: 560px; margin: 0 auto 36px; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* Footer */
.site-footer {
  background: var(--bg-footer);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 72px 0 0;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px;
  padding-bottom: 48px;
}
.footer-brand .brand-text { font-size: 20px; color: var(--text-title); margin-bottom: 14px; display: block; }
.footer-brand p { font-size: 14px; color: var(--text-muted); line-height: 1.7; max-width: 320px; }
.footer-col h4 { font-size: 16px; font-weight: 600; color: var(--text-title); margin-bottom: 18px; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul li a { font-size: 14px; color: var(--text-muted); transition: var(--transition); }
.footer-col ul li a:hover { color: var(--accent); }
.footer-contact li { font-size: 14px; color: var(--text-muted); display: flex; align-items: center; gap: 10px; }
.footer-contact li i { color: var(--accent); width: 18px; text-align: center; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.05);
  padding: 24px 0; text-align: center;
}
.footer-bottom p { font-size: 13px; color: var(--text-muted); }
.footer-bottom a { color: var(--accent); }

/* Focus states */
a:focus-visible, button:focus-visible, input:focus-visible, summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* Responsive */
@media (max-width: 1024px) {
  .section { padding: 72px 0; }
  .vertical-card, .vertical-card.flip { flex-direction: column; }
  .vertical-card-media, .vertical-card-body { width: 100%; }
  .vertical-card-media { min-height: 220px; }
  .vertical-card.flip .vertical-card-media { order: 1; }
  .vertical-card.flip .vertical-card-body { order: 2; }
  .vertical-card-body { padding: 28px; }
  .step-timeline { grid-template-columns: repeat(2, 1fr); gap: 40px; }
  .step-timeline::before { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .level-card { flex-direction: column; text-align: center; padding: 28px; }
  .level-features { justify-content: center; }
}
@media (max-width: 768px) {
  .page-hero { padding: 130px 0 64px; }
  .page-hero h1 { font-size: 28px; }
  .page-hero .hero-sub { font-size: 15px; }
  .section-head h2 { font-size: 22px; }
  .section-head { margin-bottom: 40px; }
  .vertical-card-list { gap: 20px; }
  .vertical-card-list ul { grid-template-columns: 1fr; }
  .step-timeline { grid-template-columns: 1fr; gap: 32px; }
  .feature-row { flex-direction: column; gap: 12px; padding: 24px 0; }
  .cta-section { padding: 64px 0; }
  .cta-section h2 { font-size: 24px; }
  .hero-actions { flex-direction: column; width: 100%; }
  .hero-actions .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .faq-item details { padding: 0 18px; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .section { padding: 56px 0; }
  .brand-text { font-size: 15px; }
  .level-card { padding: 24px 18px; }
  .level-icon { width: 52px; height: 52px; font-size: 20px; }
  .vertical-card-body { padding: 20px; }
}

/* roulang page: category3 */
/* ===== Design Tokens ===== */
:root {
  --bg-primary: #0A1A2F;
  --bg-secondary: #0D2036;
  --bg-card: rgba(255,255,255,0.06);
  --bg-card-hover: rgba(255,255,255,0.09);
  --border-card: rgba(255,255,255,0.10);
  --accent: #00C8FF;
  --accent-dark: #0072FF;
  --accent-gold: #FFB800;
  --text-title: #F0F6FF;
  --text-body: #A8B8CC;
  --text-muted: #60758D;
  --gradient-btn: linear-gradient(135deg, #00C8FF, #0072FF);
  --shadow-card: 0 8px 32px rgba(0,0,0,0.30);
  --shadow-glow: 0 0 24px rgba(0,200,255,0.4);
  --radius-card: 16px;
  --radius-btn: 10px;
  --container: 1200px;
  --spacer-section: 96px;
  --nav-height: 72px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg-primary);
  color: var(--text-body);
  line-height: 1.8;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  top: 0;
  right: 0;
  width: 560px;
  height: 560px;
  background: radial-gradient(circle, rgba(0,200,255,0.08), transparent 70%);
  z-index: -1;
  pointer-events: none;
}
body::after {
  content: "";
  position: fixed;
  bottom: 0;
  left: 0;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, rgba(255,184,0,0.05), transparent 70%);
  z-index: -1;
  pointer-events: none;
}
a {
  text-decoration: none;
  color: inherit;
  transition: color .2s ease;
}
img {
  max-width: 100%;
  display: block;
}
button, input {
  font-family: inherit;
  font-size: inherit;
}
ul {
  list-style: none;
}
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ===== Container ===== */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  cursor: pointer;
  border: none;
  transition: all .3s ease;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}
.btn-lg {
  padding: 14px 34px;
  font-size: 16px;
}
.btn-sm {
  padding: 9px 20px;
  font-size: 14px;
}
.btn-primary {
  background: var(--gradient-btn);
  color: #fff;
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover {
  filter: brightness(1.12);
  box-shadow: 0 0 32px rgba(0,200,255,0.55);
  transform: translateY(-2px);
  color: #fff;
}
.btn-primary:active {
  filter: brightness(0.9);
  transform: translateY(0);
  box-shadow: 0 0 16px rgba(0,200,255,0.3);
}
.btn-primary::after {
  content: "";
  position: absolute;
  top: 0;
  left: -80%;
  width: 50%;
  height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255,255,255,0.35), transparent);
  transform: skewX(-20deg);
  transition: left .6s ease;
}
.btn-primary:hover::after {
  left: 130%;
}
.btn-outline {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.24);
  color: var(--text-title);
  backdrop-filter: blur(6px);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.16);
  border-color: rgba(255,255,255,0.4);
  color: #fff;
  transform: translateY(-2px);
}
.btn-outline:active {
  transform: translateY(0);
  background: rgba(255,255,255,0.06);
}
.btn-outline-light {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.4);
  color: #fff;
}
.btn-outline-light:hover {
  background: rgba(255,255,255,0.12);
  border-color: #fff;
}

/* ===== Header & Navigation ===== */
.site-header {
  background: #FFFFFF;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 1px 0 rgba(16, 30, 50, 0.08);
}
.header-inner {
  height: var(--nav-height);
  display: flex;
  align-items: center;
  gap: 28px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: #1A2A3A;
}
.brand-icon {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--gradient-btn);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 15px;
  box-shadow: 0 4px 14px rgba(0,200,255,0.3);
}
.brand-text {
  font-size: 18px;
  font-weight: 700;
  color: #1A2A3A;
  letter-spacing: 0.2px;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: auto;
}
.nav-list a {
  color: #2A3A4A;
  font-size: 15px;
  font-weight: 500;
  display: inline-block;
  padding: 26px 0 24px;
  border-bottom: 2px solid transparent;
  transition: border-color .25s ease, color .25s ease;
}
.nav-list a:hover {
  color: var(--accent-dark);
  border-bottom-color: var(--accent);
}
.nav-list a.active {
  color: var(--accent-dark);
  border-bottom-color: var(--accent-dark);
  font-weight: 600;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}
.search-box {
  position: relative;
  width: 200px;
}
.search-box input {
  width: 100%;
  height: 38px;
  border-radius: 999px;
  border: 1px solid rgba(16,30,50,0.14);
  background: #F4F6F9;
  padding: 0 38px 0 16px;
  font-size: 14px;
  color: #1A2A3A;
  outline: none;
  transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
}
.search-box input::placeholder {
  color: #9AA8B8;
}
.search-box input:focus {
  border-color: var(--accent);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(0,200,255,0.15);
}
.search-box i {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: #8A98A8;
  font-size: 14px;
  pointer-events: none;
}
.hamburger {
  display: none;
  width: 38px;
  height: 38px;
  border: none;
  background: #F4F6F9;
  border-radius: 8px;
  color: #1A2A3A;
  font-size: 17px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: background .2s ease;
}
.hamburger:hover {
  background: #E8ECF1;
}
.hamburger:active {
  background: #DCE2E9;
}

/* ===== Page Hero ===== */
.page-hero {
  position: relative;
  padding: 96px 0 88px;
  background: var(--bg-primary);
  overflow: hidden;
}
.page-hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  opacity: 0.4;
  z-index: 0;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10,26,47,0.86) 0%, rgba(10,26,47,0.72) 40%, rgba(10,26,47,0.9) 100%);
  z-index: 1;
}
.page-hero::after {
  content: "";
  position: absolute;
  top: -120px;
  right: -100px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(0,200,255,0.14), transparent 65%);
  z-index: 2;
  pointer-events: none;
}
.page-hero .container {
  position: relative;
  z-index: 3;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.breadcrumb a {
  color: var(--text-muted);
  transition: color .2s ease;
}
.breadcrumb a:hover {
  color: var(--accent);
}
.breadcrumb i {
  font-size: 11px;
  color: var(--text-muted);
  opacity: 0.6;
}
.page-hero h1 {
  font-size: 44px;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.3;
  margin-bottom: 18px;
  letter-spacing: 0.4px;
}
.page-hero .hero-desc {
  font-size: 18px;
  color: var(--text-body);
  max-width: 640px;
  line-height: 1.8;
  margin-bottom: 36px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.hero-scroll {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-top: 56px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.28);
  color: rgba(255,255,255,0.55);
  font-size: 15px;
  transition: color .2s ease, border-color .2s ease, transform .2s ease;
  animation: scrollFloat 2.4s ease-in-out infinite;
}
.hero-scroll:hover {
  color: #fff;
  border-color: rgba(255,255,255,0.6);
}
@keyframes scrollFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

/* ===== Stats ===== */
.stats-section {
  padding: 64px 0;
  background: var(--bg-secondary);
  border-top: 1px solid rgba(255,255,255,0.04);
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.stat-item {
  text-align: center;
  padding: 16px 8px;
}
.stat-num {
  font-size: 40px;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.2;
  background: linear-gradient(135deg, #fff 20%, var(--accent) 90%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}
.stat-label {
  font-size: 14px;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

/* ===== Guide Layout ===== */
.guide-section {
  padding: var(--spacer-section) 0;
  background: var(--bg-primary);
  position: relative;
}
.guide-section::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 320px;
  background: linear-gradient(180deg, transparent, rgba(0,200,255,0.03));
  pointer-events: none;
}
.guide-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 48px;
  align-items: start;
  position: relative;
  z-index: 2;
}

/* Sidebar */
.guide-sidebar {
  position: sticky;
  top: calc(var(--nav-height) + 24px);
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.sidebar-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-card);
  padding: 24px;
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}
.sidebar-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 24px;
  right: 24px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.18), transparent);
}
.sidebar-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-title);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar-card ul li {
  margin-bottom: 6px;
}
.sidebar-card ul a {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-body);
  padding: 6px 10px;
  border-radius: 6px;
  transition: all .2s ease;
}
.sidebar-card ul a i {
  font-size: 13px;
  color: var(--text-muted);
  transition: color .2s ease, transform .2s ease;
}
.sidebar-card ul a:hover {
  background: rgba(0,200,255,0.08);
  color: var(--accent);
}
.sidebar-card ul a:hover i {
  color: var(--accent);
  transform: translateX(2px);
}
.sidebar-card p {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 10px;
  line-height: 1.7;
}
.sidebar-card p i {
  color: var(--accent);
  width: 20px;
}

/* Main content */
.guide-main {
  display: flex;
  flex-direction: column;
  gap: 56px;
  min-width: 0;
}
.content-block {
  scroll-margin-top: 90px;
}
.block-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.3;
  margin-bottom: 16px;
  position: relative;
  padding-left: 18px;
}
.block-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 4px;
  border-radius: 4px;
  background: var(--gradient-btn);
  box-shadow: 0 0 10px rgba(0,200,255,0.4);
}
.block-desc {
  font-size: 15px;
  color: var(--text-body);
  max-width: 720px;
  margin-bottom: 28px;
}
.overview-content {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-card);
  padding: 32px;
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}
.overview-content::before {
  content: "";
  position: absolute;
  top: 0;
  left: 24px;
  right: 24px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,200,255,0.25), transparent);
}
.overview-content p {
  font-size: 15px;
  color: var(--text-body);
  line-height: 1.9;
  margin-bottom: 16px;
}
.overview-content p:last-child {
  margin-bottom: 0;
}

/* Service Cards */
.service-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-card);
  padding: 28px 26px;
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-card);
  transition: all .3s ease;
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 24px;
  right: 24px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.16), transparent);
}
.service-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0,200,255,0.25);
  box-shadow: 0 12px 48px rgba(0,0,0,0.35), 0 0 32px rgba(0,200,255,0.08);
  background: var(--bg-card-hover);
}
.service-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(0,200,255,0.2), rgba(0,114,255,0.1));
  border: 1px solid rgba(0,200,255,0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 20px;
  margin-bottom: 18px;
  transition: all .3s ease;
}
.service-card:hover .service-icon {
  transform: scale(1.08);
  box-shadow: 0 0 20px rgba(0,200,255,0.2);
}
.service-card h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-title);
  margin-bottom: 8px;
}
.service-card p {
  font-size: 14px;
  color: var(--text-body);
  line-height: 1.8;
}

/* Flow Steps */
.flow-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-card);
  padding: 32px;
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}
.flow-wrap::before {
  content: "";
  position: absolute;
  top: 0;
  left: 24px;
  right: 24px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,200,255,0.22), transparent);
}
.flow-steps {
  position: relative;
  padding-left: 26px;
}
.flow-steps::before {
  content: "";
  position: absolute;
  left: 27px;
  top: 24px;
  bottom: 24px;
  width: 2px;
  background: linear-gradient(180deg, rgba(0,200,255,0.4), rgba(0,200,255,0.06));
  border-radius: 2px;
}
.flow-step {
  position: relative;
  display: flex;
  gap: 22px;
  padding-bottom: 32px;
}
.flow-step:last-child {
  padding-bottom: 0;
}
.step-num {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: rgba(0,200,255,0.1);
  border: 1px solid rgba(0,200,255,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  font-weight: 700;
  color: var(--accent);
  flex-shrink: 0;
  z-index: 1;
  box-shadow: 0 0 0 5px rgba(0,200,255,0.06);
}
.flow-step:nth-child(2) .step-num {
  border-color: rgba(255,184,0,0.35);
  background: rgba(255,184,0,0.08);
  color: var(--accent-gold);
}
.flow-step:nth-child(3) .step-num {
  border-color: rgba(0,200,255,0.3);
}
.flow-step:nth-child(4) .step-num {
  border-color: rgba(120,255,200,0.3);
  background: rgba(120,255,200,0.08);
  color: #78FFC8;
}
.step-body {
  padding-top: 4px;
}
.step-body h4 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-title);
  margin-bottom: 4px;
}
.step-body p {
  font-size: 14px;
  color: var(--text-body);
  line-height: 1.8;
}

/* Audience Cards */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.audience-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-card);
  overflow: hidden;
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-card);
  transition: all .3s ease;
  position: relative;
}
.audience-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0,200,255,0.25);
  box-shadow: 0 12px 48px rgba(0,0,0,0.35), 0 0 32px rgba(0,200,255,0.08);
}
.audience-img {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}
.audience-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.audience-card:hover .audience-img img {
  transform: scale(1.06);
}
.audience-img::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(10,26,47,0.85) 100%);
}
.audience-tag {
  position: absolute;
  left: 18px;
  bottom: 16px;
  z-index: 2;
  background: linear-gradient(135deg, var(--accent-gold), #FF8A00);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 999px;
  box-shadow: 0 4px 16px rgba(255,184,0,0.3);
}
.audience-body {
  padding: 20px 22px 24px;
}
.audience-body h4 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-title);
  margin-bottom: 6px;
}
.audience-body p {
  font-size: 14px;
  color: var(--text-body);
  line-height: 1.7;
  margin-bottom: 14px;
}
.audience-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag {
  display: inline-block;
  font-size: 12px;
  padding: 3px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.14);
  color: var(--text-body);
  transition: all .2s ease;
}
.tag:hover {
  border-color: rgba(0,200,255,0.35);
  color: var(--accent);
}

/* ===== FAQ ===== */
.faq-section {
  padding: var(--spacer-section) 0;
  background: var(--bg-secondary);
  border-top: 1px solid rgba(255,255,255,0.04);
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.faq-header {
  text-align: center;
  margin-bottom: 48px;
}
.faq-header h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 12px;
}
.faq-header p {
  font-size: 15px;
  color: var(--text-muted);
}
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 14px;
  backdrop-filter: blur(8px);
  transition: border-color .3s ease, box-shadow .3s ease;
  overflow: hidden;
}
.faq-item.open {
  border-color: rgba(0,200,255,0.3);
  box-shadow: 0 8px 40px rgba(0,0,0,0.25), 0 0 20px rgba(0,200,255,0.06);
}
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-title);
  transition: color .2s ease;
}
.faq-q:hover {
  color: var(--accent);
}
.faq-q i {
  font-size: 16px;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: all .3s ease;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
}
.faq-item.open .faq-q i {
  transform: rotate(45deg);
  color: var(--accent);
  border-color: rgba(0,200,255,0.4);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}
.faq-a-inner {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-body);
  line-height: 1.8;
  border-top: 1px solid transparent;
}
.faq-item.open .faq-a-inner {
  border-top-color: rgba(255,255,255,0.06);
}

/* ===== CTA ===== */
.cta-section {
  padding: var(--spacer-section) 0;
  background: var(--bg-primary);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 720px;
  height: 360px;
  background: radial-gradient(ellipse, rgba(0,200,255,0.07), transparent 70%);
  pointer-events: none;
}
.cta-inner {
  position: relative;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 36px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 24px;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
.cta-inner::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 260px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,200,255,0.6), transparent);
}
.cta-inner h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 16px;
}
.cta-inner p {
  font-size: 15px;
  color: var(--text-body);
  margin-bottom: 32px;
  line-height: 1.8;
}
.cta-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}

/* ===== Footer ===== */
.site-footer {
  background: #081524;
  border-top: 1px solid rgba(255,255,255,0.04);
  padding: 64px 0 0;
  color: var(--text-body);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-brand .brand-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 16px;
  display: block;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-muted);
  max-width: 340px;
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-title);
  margin-bottom: 18px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul a {
  font-size: 14px;
  color: var(--text-muted);
  transition: all .2s ease;
}
.footer-col ul a:hover {
  color: var(--accent);
  padding-left: 4px;
}
.footer-contact li {
  font-size: 14px;
  color: var(--text-muted);
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.footer-contact li i {
  color: var(--accent);
  width: 24px;
  margin-right: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.04);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
}
.footer-bottom p {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.footer-bottom a {
  color: var(--text-muted);
  transition: color .2s ease;
}
.footer-bottom a:hover {
  color: var(--accent);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .search-box {
    width: 160px;
  }
  .guide-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .guide-sidebar {
    position: static;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .audience-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .stat-num {
    font-size: 34px;
  }
}
@media (max-width: 860px) {
  .header-inner {
    gap: 14px;
  }
  .search-box {
    display: none;
  }
  .hamburger {
    display: inline-flex;
  }
  .nav-list {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: #FFFFFF;
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 24px 20px;
    gap: 0;
    box-shadow: 0 20px 32px rgba(16,30,50,0.15);
    border-top: 1px solid rgba(16,30,50,0.06);
    border-radius: 0 0 16px 16px;
    z-index: 999;
  }
  .nav-list a {
    width: 100%;
    padding: 12px 8px;
    border-bottom: 1px solid rgba(16,30,50,0.05);
    border-left: 3px solid transparent;
    font-size: 15px;
  }
  .nav-list a:hover {
    border-left-color: var(--accent);
    background: rgba(0,200,255,0.04);
  }
  .nav-list a.active {
    border-left-color: var(--accent-dark);
    background: rgba(0,200,255,0.06);
  }
  .nav-list.open {
    display: flex;
  }
  .header-actions .btn {
    padding: 8px 16px;
    font-size: 13px;
  }
  .page-hero {
    padding: 64px 0 56px;
  }
  .page-hero h1 {
    font-size: 30px;
  }
  .page-hero .hero-desc {
    font-size: 16px;
  }
  .block-title {
    font-size: 26px;
  }
  .service-grid {
    grid-template-columns: 1fr;
  }
  .audience-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .cta-inner {
    padding: 36px 24px;
  }
  .cta-inner h2 {
    font-size: 26px;
  }
}
@media (max-width: 520px) {
  .header-actions .btn {
    display: none;
  }
  .hamburger {
    display: inline-flex;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  .stat-num {
    font-size: 28px;
  }
  .stat-label {
    font-size: 13px;
  }
  .guide-sidebar {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-bottom {
    font-size: 12px;
  }
  .breadcrumb {
    flex-wrap: wrap;
  }
  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }
  .step-num {
    width: 46px;
    height: 46px;
    font-size: 15px;
  }
  .flow-steps {
    padding-left: 0;
  }
  .flow-steps::before {
    left: 23px;
  }
  .flow-step {
    gap: 16px;
  }
}