/* roulang page: index */
:root {
  --bg-deep: #060A17;
  --bg-panel: #0B1120;
  --bg-elevated: #101A30;
  --glass-bg: rgba(150, 190, 255, 0.06);
  --glass-border: rgba(170, 210, 255, 0.16);
  --glass-blur: blur(18px) saturate(140%);
  --brand: #2FB6FF;
  --brand-strong: #0088FF;
  --cyan-glow: #75E2FF;
  --text-hi: #F2F7FF;
  --text-mid: #B4C5DD;
  --text-low: #7386A5;
  --line: rgba(190, 215, 255, 0.12);
  --warn-accent: #FFB347;
  --cta-amber: #FF9F4B;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 8px;
  --shadow-card: 0 18px 50px rgba(0,0,0,0.35);
  --container: 1200px;
  --font-main: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-num: Inter, "SF Pro Display", "PingFang SC", sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background: var(--bg-deep);
  color: var(--text-hi);
  line-height: 1.75;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

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

ul {
  list-style: none;
}

::selection {
  background: rgba(47, 182, 255, 0.28);
  color: #fff;
}

:focus-visible {
  outline: 2px solid var(--cyan-glow);
  outline-offset: 3px;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section {
  padding: 96px 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 26px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: transform 0.2s ease, box-shadow 0.25s ease, background 0.25s ease, border 0.25s ease;
  white-space: nowrap;
  line-height: 1;
}

.btn-primary {
  background: linear-gradient(135deg, #006EFF 0%, #35C4FF 60%);
  color: #fff;
  box-shadow: 0 10px 34px rgba(0, 150, 255, 0.25);
}

.btn-primary:hover {
  box-shadow: 0 16px 42px rgba(0, 180, 255, 0.42);
  transform: translateY(-1px);
}

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

.btn-ghost {
  background: rgba(150, 190, 255, 0.05);
  border: 1px solid var(--glass-border);
  color: var(--text-hi);
}

.btn-ghost:hover {
  background: rgba(150, 190, 255, 0.1);
  border-color: rgba(117, 226, 255, 0.4);
  transform: translateY(-1px);
}

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

.btn-light {
  background: #fff;
  color: #0A1B3A;
}

.btn-light:hover {
  background: var(--cyan-glow);
  box-shadow: 0 12px 36px rgba(117, 226, 255, 0.32);
  transform: translateY(-1px);
}

.icon {
  width: 20px;
  height: 20px;
  flex: none;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: 76px;
  transition: background 0.35s ease, backdrop-filter 0.35s ease, border 0.35s ease;
  background: transparent;
  border-bottom: 1px solid transparent;
}

.site-header.scrolled {
  background: rgba(6, 10, 23, 0.78);
  backdrop-filter: blur(14px) saturate(150%);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  border-bottom: 1px solid var(--glass-border);
}

.nav-wrap {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: none;
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(47, 182, 255, 0.12), rgba(0, 136, 255, 0.05));
  border: 1px solid rgba(47, 182, 255, 0.26);
  color: var(--cyan-glow);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-name {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-hi);
}

.brand-tagline {
  font-size: 11px;
  color: var(--text-low);
  letter-spacing: 0.08em;
  margin-top: 2px;
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 8px;
}

.main-nav a {
  display: inline-flex;
  align-items: center;
  padding: 9px 16px;
  border-radius: 999px;
  font-weight: 500;
  color: var(--text-mid);
  transition: background 0.2s ease, color 0.2s ease;
  font-size: 14px;
  position: relative;
}

.main-nav a:hover {
  color: var(--text-hi);
  background: rgba(150, 190, 255, 0.08);
}

.main-nav a.active {
  color: var(--brand);
  background: rgba(47, 182, 255, 0.1);
}

.main-nav a.active::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--brand);
  margin-right: 7px;
  box-shadow: 0 0 8px var(--brand);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: none;
}

.nav-btn {
  height: 42px;
  padding: 0 20px;
  font-size: 13px;
}

.nav-burger {
  width: 42px;
  height: 42px;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav-burger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-hi);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

body.drawer-open .nav-burger span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

body.drawer-open .nav-burger span:nth-child(2) {
  opacity: 0;
}

body.drawer-open .nav-burger span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-drawer {
  position: fixed;
  top: 76px;
  left: 0;
  right: 0;
  height: calc(100vh - 76px);
  background: rgba(6, 10, 23, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 99;
  padding: 36px 32px 28px;
  transform: translateX(100%);
  transition: transform 0.32s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

body.drawer-open .mobile-drawer {
  transform: translateX(0);
}

.mobile-drawer ul li + li {
  margin-top: 10px;
}

.mobile-drawer a {
  display: block;
  font-size: 21px;
  font-weight: 600;
  padding: 12px 4px;
  color: var(--text-hi);
  border-bottom: 1px solid rgba(190, 215, 255, 0.06);
}

.mobile-drawer a.active {
  color: var(--brand);
}

.mobile-drawer .drawer-contact {
  color: var(--text-low);
  font-size: 13px;
  border-top: 1px solid rgba(190, 215, 255, 0.1);
  padding-top: 18px;
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 156px 0 100px;
  overflow: hidden;
  background-color: var(--bg-deep);
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% -10%, rgba(35, 160, 255, 0.22), transparent 40%), linear-gradient(180deg, rgba(6, 10, 23, 0.7) 0%, rgba(6, 10, 23, 0.82) 60%, var(--bg-deep) 100%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.2fr 0.9fr;
  gap: 72px;
  align-items: center;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan-glow);
  border: 1px solid rgba(117, 226, 255, 0.3);
  background: rgba(117, 226, 255, 0.06);
  border-radius: 999px;
  padding: 6px 16px;
  margin-bottom: 22px;
  text-transform: uppercase;
}

.hero h1 {
  font-size: 42px;
  line-height: 1.28;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--text-hi);
  margin-bottom: 18px;
}

.hero h1 .accent {
  background: linear-gradient(90deg, var(--brand), var(--cyan-glow));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-mid);
  margin-bottom: 30px;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 44px;
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  padding-top: 10px;
}

.hero-points li {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 13px;
  color: var(--text-mid);
}

.hero-points .icon {
  width: 17px;
  height: 17px;
  color: var(--brand);
}

/* Hero Visual Card */
.hero-visual {
  position: relative;
}

.glass-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: 24px;
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.preview-card .preview-head {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-mid);
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(190, 215, 255, 0.1);
  margin-bottom: 18px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan-glow);
  display: inline-block;
  box-shadow: 0 0 10px rgba(117, 226, 255, 0.7);
  animation: pulse 1.8s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.82); }
}

.preview-chip {
  margin-left: auto;
  font-size: 10px;
  letter-spacing: 0.1em;
  padding: 3px 8px;
  border-radius: 999px;
  color: var(--cyan-glow);
  background: rgba(117, 226, 255, 0.1);
  border: 1px solid rgba(117, 226, 255, 0.2);
}

.preview-numbers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 22px;
}

.preview-number {
  background: rgba(6, 10, 23, 0.38);
  border-radius: 14px;
  padding: 12px 8px;
  text-align: center;
}

.preview-number strong {
  font-family: var(--font-num);
  font-size: 22px;
  color: var(--text-hi);
  display: block;
  line-height: 1.2;
}

.preview-number span {
  font-size: 11px;
  color: var(--text-low);
}

.preview-chart {
  height: 56px;
  display: flex;
  align-items: flex-end;
  gap: 6px;
  margin-bottom: 20px;
}

.preview-chart .bar {
  flex: 1;
  border-radius: 5px 5px 0 0;
  background: linear-gradient(180deg, rgba(47, 182, 255, 0.5), rgba(47, 182, 255, 0.08));
  min-height: 6px;
}

.preview-chart .bar:nth-child(2) { height: 66%; }
.preview-chart .bar:nth-child(3) { height: 90%; }
.preview-chart .bar:nth-child(4) { height: 48%; }
.preview-chart .bar:nth-child(5) { height: 78%; }
.preview-chart .bar:nth-child(6) { height: 34%; }
.preview-chart .bar:nth-child(7) { height: 58%; }

.preview-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.preview-tags span {
  font-size: 11px;
  color: var(--text-mid);
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(150, 190, 255, 0.08);
  border: 1px solid rgba(170, 210, 255, 0.12);
}

.preview-float-icon {
  position: absolute;
  width: 64px;
  height: 64px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(47, 182, 255, 0.1);
  border: 1px solid rgba(47, 182, 255, 0.24);
  backdrop-filter: blur(10px);
  color: var(--cyan-glow);
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.3);
}

.preview-float-icon.f1 {
  top: -20px;
  right: -8px;
}

.preview-float-icon.f2 {
  bottom: -22px;
  left: -12px;
  width: 52px;
  height: 52px;
  border-radius: 16px;
}

.scroll-indicator {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-low);
  border: 1px solid rgba(190, 215, 255, 0.14);
  transition: color 0.2s, border-color 0.2s;
  animation: floatDown 2.2s infinite ease-in-out;
}

.scroll-indicator:hover {
  color: var(--brand);
  border-color: rgba(47, 182, 255, 0.4);
}

@keyframes floatDown {
  0%, 100% { transform: translate(-50%, 0); }
  50% { transform: translate(-50%, 7px); }
}

/* Stats */
.stats-section {
  padding: 30px 0;
  background: rgba(11, 17, 32, 0.6);
  border-bottom: 1px solid rgba(190, 215, 255, 0.06);
}

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

.stat-item {
  text-align: center;
  padding: 28px 16px;
}

.stat-item + .stat-item {
  border-left: 1px solid rgba(190, 215, 255, 0.08);
}

.stat-item strong {
  font-family: var(--font-num);
  font-size: 38px;
  font-weight: 700;
  display: block;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.stat-item strong i {
  font-style: normal;
  font-size: 20px;
  color: var(--brand);
  margin-left: 2px;
  vertical-align: baseline;
}

.stat-item span {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--text-low);
}

/* Section head */
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 54px;
}

.section-head h2 {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.section-head .sub {
  margin-top: 12px;
  color: var(--text-mid);
  font-size: 14px;
  max-width: 520px;
}

.section-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--brand);
  font-weight: 500;
}

.section-link:hover {
  color: var(--cyan-glow);
}

.section-link .icon {
  width: 16px;
  height: 16px;
  transition: transform 0.2s;
}

.section-link:hover .icon {
  transform: translateX(4px);
}

/* Service cards */
.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.service-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 260px;
  border: 1px solid rgba(170, 210, 255, 0.12);
  background: var(--bg-elevated);
  transition: transform 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
  isolation: isolate;
  padding: 0;
}

.service-card.wide {
  grid-column: span 2;
  min-height: 366px;
}

.service-card.wide-card {
  grid-column: span 2;
  min-height: 260px;
}

.service-card img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
  transition: transform 0.6s ease;
}

.service-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 10, 23, 0.15) 0%, rgba(6, 10, 23, 0.85) 100%);
  z-index: -1;
}

.service-card:hover {
  transform: translateY(-6px);
  border-color: rgba(117, 226, 255, 0.35);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.42);
}

.service-card:hover img {
  transform: scale(1.03);
}

.card-content {
  padding: 28px 24px 24px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.card-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  letter-spacing: 0.05em;
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(47, 182, 255, 0.14);
  color: var(--cyan-glow);
  border: 1px solid rgba(47, 182, 255, 0.22);
  margin-bottom: 16px;
}

.card-chip.amber {
  background: rgba(255, 179, 71, 0.12);
  color: var(--warn-accent);
  border-color: rgba(255, 179, 71, 0.25);
}

.card-content h3 {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--text-hi);
  margin-bottom: 8px;
}

.card-content p {
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-mid);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  max-width: 560px;
}

.card-link {
  margin-top: 18px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--brand);
  transition: color 0.2s;
}

.card-link .icon {
  width: 15px;
  height: 15px;
  transition: transform 0.2s;
}

.service-card:hover .card-link .icon {
  transform: translateX(5px);
}

/* Testimonials */
.testimonial-section {
  background: rgba(11, 17, 32, 0.5);
  border-top: 1px solid rgba(190, 215, 255, 0.05);
  border-bottom: 1px solid rgba(190, 215, 255, 0.05);
}

.testimonial-title {
  margin-bottom: 54px;
}

.testimonial-title h2 {
  font-size: 30px;
  font-weight: 700;
}

.testimonial-title p {
  color: var(--text-mid);
  font-size: 14px;
  margin-top: 10px;
}

.t-carousel {
  overflow: hidden;
}

.t-track {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  padding-bottom: 6px;
}

.t-track::-webkit-scrollbar {
  display: none;
}

.t-card {
  flex: 0 0 calc((100% - 48px) / 3);
  scroll-snap-align: start;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: 20px;
  padding: 26px;
  min-height: 260px;
  display: flex;
  flex-direction: column;
}

.t-stars {
  display: flex;
  gap: 3px;
  color: var(--warn-accent);
  font-size: 15px;
  letter-spacing: 2px;
  margin-bottom: 14px;
}

.t-card blockquote {
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-mid);
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 5;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.t-user {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid rgba(190, 215, 255, 0.1);
}

.t-avatar {
  width: 44px;
  height: 44px;
  object-fit: cover;
  border-radius: 50%;
  background: var(--bg-elevated);
}

.t-user strong {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-hi);
  display: block;
}

.t-user span {
  font-size: 12px;
  color: var(--text-low);
}

.carousel-controls {
  display: flex;
  align-items: center;
  gap: 14px;
  justify-content: center;
  margin-top: 34px;
}

.cr-btn {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--text-mid);
  transition: all 0.25s;
}

.cr-btn:hover {
  color: var(--cyan-glow);
  border-color: rgba(117, 226, 255, 0.4);
  box-shadow: 0 0 18px rgba(47, 182, 255, 0.12);
}

.cr-dots {
  display: flex;
  gap: 6px;
}

.cr-dots span {
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: rgba(190, 215, 255, 0.24);
  transition: background 0.3s, width 0.3s;
}

.cr-dots span.on {
  background: var(--brand);
  width: 22px;
}

/* Guarantee */
.guarantee-section {
  padding: 36px 0;
  background: linear-gradient(90deg, rgba(47, 182, 255, 0.05), rgba(0, 136, 255, 0.04), rgba(47, 182, 255, 0.05));
  border-bottom: 1px solid rgba(190, 215, 255, 0.05);
}

.guarantee-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.guarantee-item {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 16px 10px;
}

.guarantee-item + .guarantee-item {
  border-left: 1px solid rgba(190, 215, 255, 0.1);
}

.guarantee-item .icon {
  width: 24px;
  height: 24px;
  color: var(--brand);
}

.guarantee-item strong {
  display: block;
  font-size: 15px;
  color: var(--text-hi);
  font-weight: 600;
  line-height: 1.3;
}

.guarantee-item span {
  display: block;
  font-size: 12px;
  color: var(--text-low);
  margin-top: 2px;
}

/* News */
.news-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 48px;
  align-items: start;
}

.news-side {
  position: sticky;
  top: 110px;
}

.news-side h2 {
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 14px;
}

.news-side p {
  font-size: 14px;
  color: var(--text-mid);
  margin-bottom: 24px;
  max-width: 280px;
}

.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  border-radius: 999px;
  font-size: 12px;
  padding: 7px 14px;
  background: rgba(150, 190, 255, 0.06);
  border: 1px solid rgba(170, 210, 255, 0.14);
  color: var(--text-mid);
  cursor: default;
}

.chip.on {
  background: rgba(47, 182, 255, 0.12);
  border-color: rgba(47, 182, 255, 0.25);
  color: var(--brand);
}

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

.news-item {
  display: grid;
  grid-template-columns: 92px 1fr auto 24px;
  gap: 18px;
  align-items: center;
  border-radius: 16px;
  padding: 18px 20px;
  transition: background 0.22s, border 0.22s;
  border-bottom: 1px solid rgba(190, 215, 255, 0.08);
}

.news-item:hover {
  background: rgba(150, 190, 255, 0.04);
}

.news-item time {
  font-size: 13px;
  color: var(--text-low);
  font-family: var(--font-num);
  white-space: nowrap;
}

.news-body h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-hi);
  line-height: 1.5;
  transition: color 0.2s;
}

.news-item:hover .news-body h3 {
  color: var(--brand);
}

.news-body p {
  font-size: 13px;
  color: var(--text-mid);
  margin-top: 3px;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
}

.news-tag {
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 11px;
  background: rgba(47, 182, 255, 0.1);
  border: 1px solid rgba(47, 182, 255, 0.2);
  color: var(--brand);
  white-space: nowrap;
}

.news-arrow {
  color: var(--text-low);
  font-size: 18px;
  transition: color 0.2s, transform 0.2s;
  display: flex;
}

.news-item:hover .news-arrow {
  color: var(--cyan-glow);
  transform: translateX(4px);
}

.news-empty {
  grid-column: 1 / -1;
  text-align: center;
  border: 1px dashed rgba(190, 215, 255, 0.18);
  background: rgba(150, 190, 255, 0.03);
  border-radius: 20px;
  padding: 76px 20px;
}

.news-empty p {
  color: var(--text-mid);
  font-size: 14px;
}

/* FAQ */
.faq-section {
  background: rgba(11, 17, 32, 0.5);
}

.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
}

.faq-heading {
  text-align: center;
  margin-bottom: 48px;
}

.faq-heading .eyebrow {
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: 10px;
}

.faq-heading h2 {
  font-size: 32px;
  font-weight: 700;
}

.faq-list {
  background: rgba(6, 10, 23, 0.5);
  border-radius: 24px;
  padding: 10px 22px;
  border: 1px solid rgba(190, 215, 255, 0.1);
}

.faq-item {
  border-bottom: 1px solid rgba(190, 215, 255, 0.08);
}

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

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  width: 100%;
  padding: 20px 4px;
  font-weight: 600;
  font-size: 15px;
  color: var(--text-hi);
  text-align: left;
  transition: color 0.25s;
}

.faq-question:hover {
  color: var(--cyan-glow);
}

.faq-icon {
  width: 10px;
  height: 10px;
  position: relative;
  flex: none;
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  background: var(--brand);
  transition: transform 0.3s;
}

.faq-icon::before {
  width: 10px;
  height: 1.5px;
  top: 4px;
  left: 0;
}

.faq-icon::after {
  width: 1.5px;
  height: 10px;
  top: 0;
  left: 4px;
}

.faq-item.open .faq-icon::after {
  transform: scaleY(0);
}

.faq-answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s ease;
}

.faq-item.open .faq-answer {
  grid-template-rows: 1fr;
}

.faq-answer-inner {
  overflow: hidden;
}

.faq-answer p {
  padding: 0 32px 24px 4px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--text-mid);
}

/* CTA */
.cta-banner {
  position: relative;
  border-radius: 28px;
  overflow: hidden;
  background-color: #0B1120;
  background-image: linear-gradient(90deg, rgba(6,10,23,0.82), rgba(6,10,23,0.7)), url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  padding: 80px 48px;
  text-align: center;
}

.cta-banner::after {
  content: "";
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 120px;
  background: radial-gradient(circle, rgba(47,182,255,0.28) 0%, transparent 70%);
  filter: blur(50px);
  pointer-events: none;
}

.cta-banner h2 {
  font-size: 34px;
  line-height: 1.35;
  font-weight: 800;
  color: var(--text-hi);
  margin-bottom: 18px;
  position: relative;
}

.cta-banner p {
  color: var(--text-mid);
  font-size: 15px;
  max-width: 640px;
  margin: 0 auto 34px;
  position: relative;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  position: relative;
}

.cta-note {
  font-size: 12px;
  color: var(--text-low);
  margin-top: 22px;
  letter-spacing: 0.03em;
  position: relative;
}

/* Footer */
.site-footer {
  border-top: 1px solid rgba(190, 215, 255, 0.1);
  background: #070C19;
  padding: 72px 0 0;
  margin-top: 96px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 0.8fr 0.9fr 1.1fr;
  gap: 40px;
  padding-bottom: 56px;
}

.footer-brand p {
  font-size: 13px;
  color: var(--text-low);
  max-width: 330px;
  margin-top: 18px;
  line-height: 1.9;
}

.footer-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-hi);
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.footer-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 26px;
  height: 2px;
  background: var(--brand);
  border-radius: 2px;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--text-low);
  font-size: 14px;
  transition: color 0.2s, padding-left 0.2s;
}

.footer-links a:hover {
  color: var(--brand);
  padding-left: 5px;
}

.footer-contact li {
  color: var(--text-low);
  font-size: 14px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.65;
  margin-bottom: 14px;
}

.footer-contact .icon {
  width: 17px;
  height: 17px;
  color: var(--brand);
  margin-top: 4px;
}

.footer-contact a {
  color: var(--text-low);
  transition: color 0.2s;
}

.footer-contact a:hover {
  color: var(--brand);
}

.footer-bottom {
  border-top: 1px solid rgba(190, 215, 255, 0.08);
  padding: 18px 0;
}

.footer-bottom .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--text-low);
  font-size: 13px;
}

/* responsive */
@media screen and (max-width: 1099px) {
  .section {
    padding: 72px 0;
  }
  .service-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .service-card.wide,
  .service-card.wide-card {
    grid-column: span 2;
  }
  .service-card:not(.wide):not(.wide-card) {
    min-height: 250px;
  }
  .news-layout {
    grid-template-columns: 260px 1fr;
  }
}

@media screen and (max-width: 979px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 56px;
  }
  .main-nav {
    display: none;
  }
  .nav-actions .nav-btn {
    display: none;
  }
  .nav-burger {
    display: flex;
  }
  .news-layout {
    grid-template-columns: 1fr;
    gap: 34px;
  }
  .news-side {
    position: static;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media screen and (max-width: 819px) {
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
  .stat-item:nth-child(2) {
    border-left: none;
  }
  .stat-item:nth-child(n+3) {
    border-top: 1px solid rgba(190, 215, 255, 0.08);
  }
  .service-grid {
    grid-template-columns: 1fr;
  }
  .service-card,
  .service-card.wide,
  .service-card.wide-card {
    grid-column: auto;
    min-height: 240px;
  }
  .service-card.wide {
    min-height: 300px;
  }
  .guarantee-grid {
    grid-template-columns: 1fr 1fr;
  }
  .guarantee-item + .guarantee-item {
    border-left: none;
  }
  .guarantee-item:nth-child(3) {
    border-left: 1px solid rgba(190, 215, 255, 0.1);
  }
  .t-card {
    flex: 0 0 calc((100% - 20px) / 2);
  }
}

@media screen and (max-width: 767px) {
  .site-header {
    height: 64px;
  }
  .mobile-drawer {
    top: 64px;
    height: calc(100vh - 64px);
  }
  .brand-name {
    font-size: 15px;
  }
  .brand-tagline {
    font-size: 10px;
  }
  .hero {
    padding: 120px 0 80px;
  }
  .hero h1 {
    font-size: 30px;
  }
  .hero-sub {
    font-size: 15px;
  }
  .hero-points {
    gap: 12px;
    flex-direction: column;
  }
  .section-head h2,
  .testimonial-title h2,
  .news-side h2,
  .faq-heading h2 {
    font-size: 26px;
  }
  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    margin-bottom: 36px;
  }
  .card-content h3 {
    font-size: 18px;
  }
  .t-card {
    flex: 0 0 86%;
  }
  .news-item {
    grid-template-columns: 1fr auto;
    gap: 10px;
  }
  .news-item time {
    font-size: 12px;
  }
  .news-tag {
    display: none;
  }
  .cta-banner {
    padding: 48px 24px;
  }
  .cta-banner h2 {
    font-size: 25px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }
}

@media screen and (max-width: 519px) {
  .section {
    padding: 56px 0;
  }
  .hero-inner {
    gap: 40px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
  .stat-item strong {
    font-size: 30px;
  }
  .preview-card {
    padding: 18px;
  }
  .preview-numbers {
    gap: 8px;
  }
  .preview-number strong {
    font-size: 18px;
  }
  .guarantee-grid {
    grid-template-columns: 1fr;
  }
  .guarantee-item:nth-child(3) {
    border-left: none;
  }
  .guarantee-item + .guarantee-item {
    border-top: 1px solid rgba(190, 215, 255, 0.08);
  }
  .news-item {
    padding: 14px 4px;
    grid-template-columns: 1fr;
    gap: 6px;
  }
  .news-arrow {
    display: none;
  }
  .faq-list {
    padding: 6px 16px;
  }
  .faq-question {
    font-size: 14px;
    padding: 18px 2px;
  }
  .cta-actions .btn {
    width: 100%;
  }
  .footer-bottom .container {
    flex-direction: column;
    text-align: center;
  }
}

@media (hover: none) {
  .service-card:hover {
    transform: none;
  }
  .btn:hover {
    transform: none;
  }
}

/* roulang page: category1 */
:root{
  --bg-deep:#060A17;
  --bg-panel:#0B1120;
  --bg-elevated:#101A30;
  --glass-bg:rgba(150,190,255,0.06);
  --glass-border:rgba(170,210,255,0.16);
  --brand:#2FB6FF;
  --brand-strong:#0088FF;
  --cyan-glow:#75E2FF;
  --text-hi:#F2F7FF;
  --text-mid:#B4C5DD;
  --text-low:#7386A5;
  --line:rgba(190,215,255,0.12);
  --warn-accent:#FFB347;
  --radius-sm:6px;
  --radius-md:16px;
  --radius-lg:24px;
  --radius-pill:999px;
  --shadow-card:0 18px 50px rgba(0,0,0,0.35);
  --header-h:76px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg-deep);
  color:var(--text-hi);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none;transition:color .2s ease}
a:hover{color:var(--cyan-glow)}
img{max-width:100%;display:block}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%}
.icon{width:20px;height:20px;fill:none;stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}

/* ===== Header & Nav ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:var(--header-h);
  transition:background .3s ease,box-shadow .3s ease,border-color .3s ease;
  background:rgba(6,10,23,0.55);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid transparent;
}
.site-header.scrolled{
  background:rgba(6,10,23,0.88);
  border-bottom-color:var(--glass-border);
  box-shadow:0 8px 30px rgba(0,0,0,0.3);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:var(--header-h);gap:24px;
}
.brand{
  display:inline-flex;align-items:center;gap:12px;
  flex-shrink:0;
}
.brand-mark{
  width:42px;height:42px;border-radius:12px;
  background:linear-gradient(135deg,rgba(0,110,255,.35),rgba(53,196,255,.18));
  border:1px solid var(--glass-border);
  display:flex;align-items:center;justify-content:center;
  color:var(--brand);
  box-shadow:0 0 20px rgba(0,150,255,0.15);
}
.brand-mark svg{width:24px;height:24px}
.brand-text{display:flex;flex-direction:column;line-height:1.2;gap:2px}
.brand-name{
  font-size:18px;font-weight:800;letter-spacing:.02em;
  background:linear-gradient(120deg,#fff,var(--cyan-glow));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.brand-tagline{font-size:11px;color:var(--text-low);letter-spacing:.08em}

.main-nav ul{display:flex;align-items:center;gap:8px}
.main-nav a{
  display:inline-block;padding:8px 18px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:500;color:var(--text-mid);
  border:1px solid transparent;
  transition:all .25s ease;position:relative;
}
.main-nav a:hover{color:var(--text-hi);background:rgba(150,190,255,0.06)}
.main-nav a.active{
  color:var(--cyan-glow);
  background:rgba(46,182,255,0.1);
  border-color:rgba(117,226,255,0.22);
}
.main-nav a.active::before{
  content:"";position:absolute;left:10px;top:50%;transform:translateY(-50%);
  width:5px;height:5px;border-radius:50%;
  background:var(--cyan-glow);
  box-shadow:0 0 8px var(--cyan-glow);
}
.header-actions{display:flex;align-items:center;gap:12px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 26px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:all .25s ease;border:1px solid transparent;
}
.btn-primary{
  background:linear-gradient(135deg,#006EFF 0%,#35C4FF 100%);
  color:#fff;
  box-shadow:0 6px 24px rgba(0,140,255,0.25);
}
.btn-primary:hover{box-shadow:0 10px 34px rgba(0,150,255,0.4);transform:translateY(-1px);color:#fff}
.btn-primary:active{transform:scale(.98)}
.btn-ghost{
  background:var(--glass-bg);
  border-color:var(--glass-border);
  color:var(--text-hi);
  backdrop-filter:blur(10px);
}
.btn-ghost:hover{border-color:rgba(117,226,255,0.4);background:rgba(46,182,255,0.08)}
.btn-ghost:active{transform:scale(.98)}
.menu-toggle{display:none;width:44px;height:44px;border-radius:10px;align-items:center;justify-content:center;border:1px solid var(--glass-border)}
.menu-toggle svg{width:22px;height:22px}

/* Mobile Nav */
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(360px,86vw);z-index:200;
  background:rgba(6,10,23,0.97);
  backdrop-filter:blur(20px) saturate(140%);
  border-left:1px solid var(--glass-border);
  padding:28px 24px;
  transform:translateX(105%);
  transition:transform .35s cubic-bezier(.4,0,.2,1);
  display:flex;flex-direction:column;
}
.mobile-drawer.open{transform:translateX(0)}
.drawer-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:36px}
.drawer-head .brand-tagline{display:block}
.drawer-close{width:40px;height:40px;border-radius:10px;border:1px solid var(--glass-border);display:flex;align-items:center;justify-content:center}
.drawer-nav ul{display:flex;flex-direction:column;gap:6px}
.drawer-nav a{
  display:block;padding:14px 16px;font-size:22px;font-weight:600;
  color:var(--text-hi);border-radius:14px;transition:background .2s;
}
.drawer-nav a:hover{background:rgba(46,182,255,0.08)}
.drawer-nav a.active{color:var(--cyan-glow);background:rgba(46,182,255,0.1)}
.drawer-bottom{margin-top:auto;padding-top:24px;border-top:1px solid var(--line)}
.drawer-contact{display:flex;flex-direction:column;gap:12px;color:var(--text-mid);font-size:14px}
.drawer-contact a{color:var(--text-mid)}
.drawer-contact a:hover{color:var(--cyan-glow)}

/* ===== Page Hero ===== */
.page-hero{
  position:relative;
  padding:150px 0 80px;
  background:radial-gradient(circle at 50% -10%,rgba(35,160,255,0.14),transparent 45%),var(--bg-deep);
  overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/backpic/back-1.png') center 20% / cover no-repeat;
  opacity:.22;mix-blend-mode:luminosity;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,10,23,.75),rgba(6,10,23,.92) 80%,var(--bg-deep));
}
.page-hero .container{position:relative;z-index:2}
.breadcrumb{
  display:flex;align-items:center;gap:8px;
  font-size:13px;color:var(--text-low);margin-bottom:22px;
}
.breadcrumb a{color:var(--text-low)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{opacity:.5}
.breadcrumb .current{color:var(--text-mid)}
.page-hero h1{
  font-size:42px;font-weight:800;line-height:1.22;
  letter-spacing:.01em;margin-bottom:20px;
}
.page-hero h1 .accent{
  background:linear-gradient(120deg,#fff,var(--cyan-glow));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.page-hero .hero-desc{
  max-width:760px;font-size:16px;line-height:1.9;
  color:var(--text-mid);margin-bottom:32px;
}
.hero-feature-row{
  display:flex;flex-wrap:wrap;gap:28px;margin-top:36px;
}
.hero-feature{
  display:flex;align-items:center;gap:10px;
  font-size:13px;color:var(--text-mid);
}
.hero-feature .icon-wrap{
  width:32px;height:32px;border-radius:9px;
  background:rgba(46,182,255,.1);
  border:1px solid rgba(117,226,255,.18);
  display:flex;align-items:center;justify-content:center;
  color:var(--cyan-glow);
}
.hero-feature .icon-wrap svg{width:17px;height:17px}

/* ===== Section Common ===== */
.section{padding:88px 0;position:relative}
.section-title-row{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:32px;margin-bottom:48px;
}
.section-title-row .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.12em;
  color:var(--brand);text-transform:uppercase;
  margin-bottom:12px;
}
.eyebrow::before{
  content:"";width:24px;height:1.5px;background:linear-gradient(90deg,var(--brand),transparent);
}
.section-title-row h2{
  font-size:30px;font-weight:700;line-height:1.3;
}
.section-title-row .subline{
  font-size:15px;color:var(--text-low);
  max-width:520px;margin-top:8px;
}
.sec-link-more{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;
  color:var(--brand);padding:8px 18px;border-radius:var(--radius-pill);
  border:1px solid rgba(46,182,255,.25);transition:all .25s;
  white-space:nowrap;
}
.sec-link-more:hover{background:rgba(46,182,255,.08);border-color:rgba(117,226,255,.4)}

/* ===== Category intro grid ===== */
.intro-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
}
.intro-card{
  position:relative;
  padding:32px 28px;
  border-radius:var(--radius-lg);
  background:var(--glass-bg);
  border:1px solid var(--glass-border);
  backdrop-filter:blur(18px) saturate(140%);
  transition:all .3s ease;
  overflow:hidden;
}
.intro-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,rgba(46,182,255,.6),transparent);
  opacity:0;transition:opacity .3s;
}
.intro-card:hover{transform:translateY(-5px);border-color:rgba(117,226,255,.35);box-shadow:var(--shadow-card)}
.intro-card:hover::before{opacity:1}
.intro-card .card-icon{
  width:52px;height:52px;border-radius:15px;
  background:linear-gradient(135deg,rgba(0,110,255,.28),rgba(53,196,255,.12));
  border:1px solid rgba(117,226,255,.2);
  display:flex;align-items:center;justify-content:center;
  color:var(--cyan-glow);margin-bottom:20px;
}
.intro-card .card-icon svg{width:26px;height:26px}
.intro-card h3{font-size:19px;font-weight:700;margin-bottom:12px}
.intro-card p{font-size:14px;color:var(--text-mid);line-height:1.75;margin-bottom:20px}
.intro-card .card-tag{
  display:inline-block;padding:4px 12px;border-radius:var(--radius-pill);
  background:rgba(46,182,255,.08);color:var(--brand);
  font-size:12px;font-weight:500;
}

/* ===== Steps ===== */
.steps-section{background:var(--bg-panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.steps-section .section-title-row h2{max-width:520px}
.steps-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:24px;
}
.step-item{
  position:relative;padding:36px 20px 28px;border-radius:var(--radius-md);
  background:var(--bg-elevated);border:1px solid var(--line);
  transition:all .25s ease;
}
.step-item:hover{border-color:rgba(117,226,255,.25);transform:translateY(-4px)}
.step-num{
  position:absolute;top:20px;right:24px;
  font-family:"Inter","SF Pro Display",sans-serif;
  font-size:44px;font-weight:800;line-height:1;
  color:rgba(46,182,255,.14);
}
.step-point{
  position:relative;display:inline-flex;align-items:center;justify-content:center;
  width:56px;height:56px;border-radius:18px;margin-bottom:24px;
  background:linear-gradient(135deg,rgba(0,110,255,.4),rgba(53,196,255,.18));
  border:1px solid rgba(117,226,255,.3);
  box-shadow:0 0 22px rgba(0,150,255,.12);
}
.step-point svg{width:26px;height:26px;color:var(--cyan-glow)}
.step-item h3{font-size:17px;font-weight:700;margin-bottom:10px}
.step-item p{font-size:13px;color:var(--text-mid);line-height:1.7}
.step-link{
  display:inline-flex;align-items:center;gap:6px;margin-top:16px;
  font-size:13px;font-weight:600;color:var(--brand);transition:gap .2s;
}
.step-link:hover{gap:10px;color:var(--cyan-glow)}

/* ===== Data band ===== */
.data-band{
  padding:56px 0;
  background:radial-gradient(circle at 80% 50%,rgba(35,160,255,.08),transparent 45%);
  position:relative;
}
.data-row{
  display:grid;grid-template-columns:repeat(4,1fr);gap:32px;
  border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:44px 36px;
  background:rgba(6,10,23,.35);
}
.data-item{text-align:center;position:relative}
.data-item + .data-item::before{
  content:"";position:absolute;left:-16px;top:10%;bottom:10%;width:1px;
  background:var(--line);
}
.data-item strong{
  display:block;font-family:"Inter","SF Pro Display",sans-serif;
  font-size:38px;font-weight:800;line-height:1.2;
  background:linear-gradient(120deg,#fff,var(--cyan-glow));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  margin-bottom:6px;
}
.data-item span{font-size:13px;color:var(--text-low);letter-spacing:.04em}

/* ===== Features split ===== */
.feature-split-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center;
  margin-bottom:80px;
}
.feature-split-grid.alt{grid-template-columns:1fr 1fr;direction:ltr}
.feature-split-grid.alt .feature-visual{order:2}
.feature-split-grid .feature-content h3{
  font-size:26px;font-weight:700;line-height:1.35;margin-bottom:16px;
}
.feature-split-grid .feature-content > p{
  font-size:15px;color:var(--text-mid);line-height:1.85;margin-bottom:24px;
}
.check-list{display:grid;gap:12px;margin-top:24px;margin-bottom:28px}
.check-list li{
  display:flex;align-items:flex-start;gap:10px;
  padding:12px 16px;border-radius:12px;
  background:var(--glass-bg);border:1px solid var(--line);
  font-size:14px;color:var(--text-mid);
  transition:border .2s;
}
.check-list li:hover{border-color:rgba(117,226,255,.2)}
.check-list li svg{
  width:18px;height:18px;color:var(--brand);
  flex-shrink:0;margin-top:2px;
  stroke-width:2.2;
}
.feature-visual{
  position:relative;align-self:flex-end;
}
.visual-card{
  border-radius:var(--radius-lg);
  border:1px solid var(--glass-border);
  background:var(--glass-bg);
  backdrop-filter:blur(14px);
  padding:42px 36px 36px;
  overflow:hidden;
  box-shadow:var(--shadow-card);
}
.visual-card::after{
  content:"";position:absolute;top:-80px;right:-80px;width:180px;height:180px;
  background:radial-gradient(circle,rgba(46,182,255,.2),transparent 70%);
}
.visual-card img{
  border-radius:12px;object-fit:cover;width:100%;height:220px;
  margin-bottom:18px;
}
.visual-card p{
  font-size:13px;color:var(--text-mid);
  display:flex;align-items:center;justify-content:center;gap:8px;
}
.dot-float{
  position:absolute;width:14px;height:14px;border-radius:50%;
  background:var(--cyan-glow);box-shadow:0 0 18px var(--cyan-glow);
  animation:floaty 3s ease-in-out infinite alternate;
}
@keyframes floaty{
  from{transform:translateY(0)}
  to{transform:translateY(-14px)}
}

/* ===== Service categories ===== */
.cat-panel{
  width:100%;
  border-radius:var(--radius-lg);
  background:rgba(11,17,32,.6);
  border:1px solid var(--line);
  overflow:hidden;
  margin-top:24px;
}
.cat-table{
  width:100%;
  border-collapse:collapse;
}
.cat-table th{
  text-align:left;padding:16px 20px;
  font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--text-low);background:rgba(150,190,255,.04);
  border-bottom:1px solid var(--line);
}
.cat-table td{
  padding:18px 20px;border-bottom:1px solid rgba(190,215,255,.05);
  font-size:14px;vertical-align:middle;
}
.cat-table tr:last-child td{border-bottom:none}
.cat-table tr:hover td{background:rgba(46,182,255,.025)}
.cat-name{font-weight:600;color:var(--text-hi);display:flex;align-items:center;gap:10px}
.cat-level{
  display:inline-block;padding:3px 10px;font-size:12px;border-radius:var(--radius-pill);
  background:rgba(46,182,255,.1);color:var(--brand);
  font-weight:600;white-space:nowrap;
}
.level-amber{background:rgba(255,179,71,.1);color:var(--warn-accent)}
.status-dot::before{
  content:"";display:inline-block;width:7px;height:7px;border-radius:50%;
  background:#35C4FF;margin-right:8px;
  box-shadow:0 0 8px rgba(53,196,255,.5);
}

/* ===== Card list ===== */
.card-list{
  display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:20px;
}
.article-row-card{
  display:flex;gap:20px;align-items:center;
  padding:24px;border-radius:var(--radius-md);
  background:var(--glass-bg);border:1px solid var(--glass-border);
  transition:all .25s ease;
}
.article-row-card:hover{
  border-color:rgba(117,226,255,.35);transform:translateY(-3px);
  box-shadow:0 10px 28px rgba(0,0,0,.25);
}
.article-row-card .text-block{flex:1;min-width:0}
.article-row-card .text-block h3{
  font-size:17px;font-weight:700;line-height:1.4;margin-bottom:8px;
  overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
}
.article-row-card .text-block p{
  font-size:13px;color:var(--text-low);line-height:1.7;
  overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
}
.article-row-card .img-wrap{
  width:130px;height:92px;border-radius:12px;overflow:hidden;flex-shrink:0;
  background:linear-gradient(135deg,rgba(0,110,255,.2),transparent);
}
.article-row-card .img-wrap img{width:100%;height:100%;object-fit:cover}

/* ===== FAQ ===== */
.faq-wrap{max-width:820px;margin:20px auto 0}
.faq-item{
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  margin-bottom:14px;
  background:rgba(11,17,32,.5);
  overflow:hidden;
  transition:border-color .25s;
}
.faq-item:hover{border-color:rgba(117,226,255,.2)}
.faq-item.open{border-color:rgba(117,226,255,.4)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;
  padding:20px 24px;cursor:pointer;gap:16px;
}
.faq-q .label{
  font-weight:600;font-size:16px;color:var(--text-hi);
  transition:color .2s;
}
.faq-item.open .faq-q .label{color:var(--cyan-glow)}
.faq-q .faq-icon{
  width:28px;height:28px;border-radius:50%;
  border:1px solid rgba(117,226,255,.3);
  position:relative;flex-shrink:0;
  transition:transform .3s ease,background .3s ease;
}
.faq-q .faq-icon::before,.faq-q .faq-icon::after{
  content:"";position:absolute;top:50%;left:50%;
  background:var(--brand);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-q .faq-icon::before{width:10px;height:1.8px}
.faq-q .faq-icon::after{width:1.8px;height:10px}
.faq-item.open .faq-icon{
  background:rgba(46,182,255,.12);
  border-color:var(--brand);
  transform:rotate(45deg);
}
.faq-a{
  padding:0 24px 4px;
  color:var(--text-mid);font-size:14px;line-height:1.85;
  max-height:0;overflow:hidden;
  transition:max-height .3s ease,padding .3s ease;
}
.faq-item.open .faq-a{
  max-height:400px;padding:0 24px 20px;
}

/* ===== CTA ===== */
.cta-banner{
  position:relative;border-radius:var(--radius-lg);
  padding:72px 56px;text-align:center;overflow:hidden;
  background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;
}
.cta-banner::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(6,10,23,.92),rgba(0,80,160,.75));
}
.cta-banner .container{position:relative;z-index:2;padding:0}
.cta-banner h2{
  font-size:32px;font-weight:800;line-height:1.3;margin-bottom:14px;
}
.cta-banner p{
  font-size:15px;color:var(--text-mid);
  max-width:600px;margin:0 auto 32px;line-height:1.8;
}
.cta-actions{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
.btn-hero{
  height:52px;padding:0 36px;font-size:16px;
  background:linear-gradient(135deg,#007BFF,#49D3FF,1.5);
  box-shadow:0 10px 34px rgba(0,150,255,.35);
}
.btn-hero:hover{
  box-shadow:0 14px 44px rgba(0,150,255,.5);
  transform:translateY(-2px);
}

/* ===== Footer ===== */
.site-footer{
  background:var(--bg-panel);
  border-top:1px solid var(--line);
  padding:64px 0 28px;
  margin-top:40px;
}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:48px;margin-bottom:56px;
}
.footer-brand p{
  font-size:13px;color:var(--text-low);line-height:1.8;
  margin-top:18px;max-width:320px;
}
.site-footer .brand-name{
  background:none;-webkit-text-fill-color:var(--text-hi);
  font-size:18px;font-weight:700;
}
.footer-title{
  font-size:15px;font-weight:600;color:var(--text-hi);
  margin-bottom:18px;position:relative;
}
.footer-links{display:grid;gap:10px}
.footer-links a, .footer-contact li a{
  font-size:14px;color:var(--text-mid);transition:color .2s;
}
.footer-links a:hover,.footer-contact li a:hover{color:var(--cyan-glow)}
.footer-contact{display:grid;gap:16px}
.footer-contact li{
  display:flex;align-items:center;gap:10px;
  font-size:14px;color:var(--text-mid);
}
.footer-contact .icon{color:var(--brand);width:17px;height:17px}
.footer-bottom{
  display:flex;justify-content:space-between;align-items:center;gap:20px;
  border-top:1px solid var(--line);
  padding-top:24px;font-size:12px;color:var(--text-low);
  flex-wrap:wrap;
}
.footer-bottom a{color:var(--text-low)}

/* Scroll top */
.scroll-top{
  position:fixed;right:24px;bottom:24px;z-index:90;
  width:44px;height:44px;border-radius:50%;
  background:rgba(11,17,32,.88);
  border:1px solid var(--glass-border);
  backdrop-filter:blur(10px);
  display:flex;align-items:center;justify-content:center;
  color:var(--brand);box-shadow:0 8px 20px rgba(0,0,0,.3);
  opacity:0;pointer-events:none;
  transition:all .3s;
}
.scroll-top.show{opacity:1;pointer-events:auto}
.scroll-top:hover{border-color:var(--brand);color:var(--cyan-glow)}

@media (min-width:769px){
  .mobile-drawer{display:none}
  .drawer-overlay{display:none}
}

/* RWD */
@media(max-width:1024px){
  .intro-grid{grid-template-columns:repeat(2,1fr)}
  .steps-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .feature-split-grid{grid-template-columns:1fr;gap:48px}
  .feature-split-grid.alt .feature-visual{order:0}
  .feature-split-grid .feature-visual{align-self:auto;max-width:620px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px}
}
@media(max-width:768px){
  .site-header{height:60px}
  .header-inner{height:60px}
  .brand-mark{width:36px;height:36px;border-radius:10px}
  .brand-mark svg{width:20px;height:20px}
  .brand-name{font-size:16px}
  .brand-tagline{display:none}
  .page-hero{padding:110px 0 56px}
  .page-hero h1{font-size:29px}
  .page-hero .hero-desc{font-size:14px}
  .main-nav{display:none}
  .header-actions .btn{display:none}
  .menu-toggle{display:flex}
  .section{padding:60px 0}
  .section-title-row{flex-direction:column;align-items:flex-start;gap:16px;margin-bottom:36px}
  .section-title-row h2{font-size:25px}
  .intro-grid{grid-template-columns:1fr;gap:16px}
  .intro-card{padding:26px 22px}
  .steps-grid{grid-template-columns:1fr;gap:16px}
  .data-row{grid-template-columns:repeat(2,1fr);gap:24px 16px;padding:28px 18px}
  .data-item::before{display:none}
  .data-item strong{font-size:29px}
  .feature-split-grid{grid-template-columns:1fr;gap:36px}
  .card-list{grid-template-columns:1fr;gap:16px}
  .visual-card{padding:24px 18px 18px}
  .visual-card img{height:160px}
  .cta-banner{padding:48px 22px}
  .cta-banner h2{font-size:24px}
  .faq-q{padding:17px 18px}
  .faq-q .label{font-size:14px}
  .step-item{padding:24px 18px}
  .cat-table th,.cat-table td{padding:12px 12px;font-size:12px}
  .footer-grid{grid-template-columns:1fr;gap:36px}
  .scroll-top{right:18px;bottom:18px}
}
@media(max-width:520px){
  .intro-card{padding:22px 18px}
  .page-hero h1{font-size:25px}
  .hero-feature-row{flex-direction:column;gap:12px}
  .data-row{grid-template-columns:1fr}
  .article-row-card{flex-direction:column;align-items:flex-start}
  .article-row-card .img-wrap{width:100%;height:126px}
  .footer-bottom{flex-direction:column;justify-content:flex-start;align-items:flex-start}
}

/* roulang page: article */
:root{
  --bg-deep:#060A17;
  --bg-panel:#0B1120;
  --bg-elevated:#101A30;
  --glass-bg:rgba(150,190,255,.06);
  --glass-border:rgba(170,210,255,.16);
  --glass-blur:blur(18px) saturate(140%);
  --brand:#2FB6FF;
  --brand-strong:#0088FF;
  --cyan-glow:#75E2FF;
  --text-hi:#F2F7FF;
  --text-mid:#B4C5DD;
  --text-low:#7386A5;
  --line:rgba(190,215,255,.12);
  --warn-accent:#FFB347;
  --cta-amber:#FF9F4B;
  --grad-main:linear-gradient(135deg,#006EFF 0%,#35C4FF 60%);
  --grad-glow:linear-gradient(135deg,#007BFF,#49D3FF);
  --shadow-main:0 18px 50px rgba(0,0,0,.35), inset 0 0 0 rgba(255,255,255,.04);
  --radius-sm:6px;
  --radius-md:16px;
  --radius-lg:24px;
  --container:1200px;
  --header-h:76px;
  --font-main:PingFang SC,HarmonyOS Sans SC,Microsoft YaHei,Noto Sans SC,sans-serif;
  --font-num:Inter,"SF Pro Display",PingFang SC,Microsoft YaHei,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg-deep);color:var(--text-mid);font-family:var(--font-main);font-size:16px;line-height:1.75;min-height:100vh;-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0;background:radial-gradient(circle at 50% -10%,rgba(35,160,255,.14),transparent 42%);pointer-events:none;z-index:0}
body.nav-open{overflow:hidden}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .2s ease,opacity .2s ease}
button{font-family:inherit;border:0;background:none;cursor:pointer;color:inherit}
ul,ol{list-style:none}
.skip-link{position:absolute;left:16px;top:-70px;z-index:200;background:var(--bg-elevated);color:var(--text-hi);padding:12px 20px;border-radius:10px;transition:top .2s}
.skip-link:focus{top:14px}
.container{width:min(var(--container),100% - 48px);margin:0 auto;position:relative;z-index:1}
.icon{width:20px;height:20px;stroke:currentColor;flex:none;opacity:.9}
.site-header{position:sticky;top:0;z-index:100;height:var(--header-h);backdrop-filter:blur(16px) saturate(150%);background:rgba(6,10,23,.72);border-bottom:1px solid var(--line)}
.header-row{height:var(--header-h);display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-mark{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;color:var(--brand);background:rgba(43,182,255,.1);border:1px solid rgba(43,182,255,.28);box-shadow:0 0 24px rgba(43,182,255,.12)}
.brand-mark .icon{width:24px;height:24px}
.brand-text{display:flex;flex-direction:column;line-height:1.2;min-width:0}
.brand-name{color:var(--text-hi);font-weight:800;font-size:19px;letter-spacing:.02em;white-space:nowrap}
.brand-tagline{color:var(--text-low);font-size:11px;letter-spacing:.12em;white-space:nowrap}
.main-nav{margin-left:16px}
.main-nav ul{display:flex;align-items:center;gap:8px}
.main-nav li a{display:inline-flex;align-items:center;height:42px;padding:0 18px;border-radius:999px;color:var(--text-mid);font-size:15px;font-weight:500;transition:all .25s}
.main-nav li a:hover{color:var(--text-hi);background:rgba(150,190,255,.08)}
.main-nav li a.active{color:var(--cyan-glow);background:rgba(43,182,255,.12);box-shadow:inset 0 0 0 1px rgba(43,182,255,.22)}
.header-actions{display:flex;align-items:center;gap:12px}
.search-btn.open-mobile{display:none}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;line-height:1;border-radius:999px;transition:all .2s ease}
.btn-primary{background:var(--grad-main);color:#fff;padding:12px 22px;box-shadow:0 8px 26px rgba(0,150,255,.24)}
.btn-primary:hover{color:#fff;transform:translateY(-1px);box-shadow:0 10px 34px rgba(0,150,255,.4)}
.btn-primary:active{transform:scale(.97)}
.btn-ghost{background:rgba(150,190,255,.06);color:var(--text-hi);border:1px solid var(--glass-border);padding:11px 22px;backdrop-filter:blur(8px)}
.btn-ghost:hover{color:var(--cyan-glow);border-color:rgba(43,182,255,.45);background:rgba(43,182,255,.08)}
.btn-glow{background:var(--grad-glow);color:#fff;height:52px;padding:0 34px;font-size:16px;box-shadow:0 10px 34px rgba(0,150,255,.35)}
.btn-glow:hover{transform:translateY(-1px) scale(1.01);box-shadow:0 14px 44px rgba(0,160,255,.5);color:#fff}
.hamburger{display:none;width:42px;height:42px;border-radius:10px;align-items:center;justify-content:center;background:var(--glass-bg);border:1px solid var(--glass-border);color:var(--text-hi)}
.hamburger .bar{display:block;width:18px;height:2px;border-radius:2px;background:currentColor;transition:all .3s}
.hamburger .bar+.bar{margin-top:5px}
.nav-open .hamburger .bar:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-open .hamburger .bar:nth-child(2){opacity:0}
.nav-open .hamburger .bar:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-drawer{position:fixed;inset:0;z-index:95;background:rgba(6,10,23,.9);backdrop-filter:blur(20px);display:flex;flex-direction:column;visibility:hidden;opacity:0;transition:opacity .25s,visibility .25s}
.mobile-drawer.open{visibility:visible;opacity:1}
.mobile-drawer-inner{padding:100px 28px 40px;display:flex;flex-direction:column;flex:1}
.mobile-drawer li+li{margin-top:28px}
.mobile-drawer li a{display:flex;align-items:center;font-size:22px;font-weight:600;color:var(--text-hi);gap:10px}
.mobile-drawer li a span{width:8px;height:8px;border-radius:50%;background:var(--brand);opacity:0}
.mobile-drawer li a.active span{opacity:1;box-shadow:0 0 14px var(--brand)}
.mobile-drawer-foot{margin-top:auto;padding-top:32px;border-top:1px solid var(--line);color:var(--text-low);font-size:13px;display:grid;gap:8px}
.mobile-drawer-foot a{color:var(--text-mid)}
.article-hero{position:relative;padding:76px 0 64px;overflow:hidden}
.article-hero::before{content:"";position:absolute;inset:0;background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;opacity:.5}
.article-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(rgba(6,10,23,.78),rgba(6,10,23,.95));}
.breadcrumb{position:relative;z-index:2;margin-bottom:28px}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:14px;color:var(--text-low)}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:rgba(115,134,165,.55)}
.breadcrumb a:hover{color:var(--cyan-glow)}
.breadcrumb [aria-current="page"]{color:var(--text-mid);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:340px}
.article-hero-content{max-width:840px}
.article-eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;font-size:12px;letter-spacing:.08em;color:var(--cyan-glow);background:rgba(43,182,255,.1);border:1px solid rgba(43,182,255,.22);margin-bottom:22px}
.article-hero h1{color:var(--text-hi);font-size:38px;line-height:1.3;font-weight:800;letter-spacing:.01em;margin-bottom:20px}
.article-preview{font-size:16px;color:var(--text-mid);line-height:1.8;max-width:720px;margin-bottom:26px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 16px;color:var(--text-low);font-size:14px}
.article-meta .dot-sep{display:inline-flex;align-items:center;gap:8px}
.article-meta .dot-sep+.dot-sep::before{content:"";width:4px;height:4px;border-radius:50%;background:rgba(115,134,165,.7)}
.article-meta b{color:var(--text-mid);font-weight:600}
.article-tag-chip{display:inline-flex;padding:4px 12px;border-radius:999px;background:rgba(43,182,255,.12);color:var(--brand);font-size:12px}
.article-body-wrap{padding:64px 0}
.article-read{max-width:780px;margin:0 auto;position:relative}
.article-main-content{background:var(--bg-panel);border:1px solid var(--line);border-radius:24px;padding:48px 56px;box-shadow:var(--shadow-main)}
.article-body{color:var(--text-mid);font-size:16px;line-height:1.9}
.article-body p{margin-bottom:1.6em}
.article-body h2{margin-top:2.2em;margin-bottom:.9em;color:var(--text-hi);font-size:25px;font-weight:700;line-height:1.4;padding-left:14px;border-left:4px solid var(--brand)}
.article-body h3{margin-top:1.8em;margin-bottom:.7em;color:var(--text-hi);font-size:20px;font-weight:600}
.article-body ul,.article-body ol{margin:0 0 1.6em;padding-left:0}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:.6em}
.article-body ul li::before{content:"";position:absolute;left:2px;top:.76em;width:7px;height:7px;border-radius:2px;background:var(--brand)}
.article-body ol{counter-reset:item}
.article-body ol li{position:relative;padding-left:32px;margin-bottom:.5em;counter-increment:item}
.article-body ol li::before{content:counter(item);position:absolute;left:0;top:.2em;width:22px;height:22px;border-radius:50%;background:rgba(43,182,255,.12);color:var(--cyan-glow);font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center}
.article-body blockquote{margin:1.8em 0;padding:22px 26px;background:var(--bg-elevated);border-left:3px solid var(--brand);border-radius:0 14px 14px 0;color:var(--text-mid);font-size:15px}
.article-body img{border-radius:16px;margin:28px 0;box-shadow:var(--shadow-main)}
.article-body a{color:var(--brand);font-weight:500;border-bottom:1px solid transparent}
.article-body a:hover{color:var(--cyan-glow);border-bottom-color:rgba(117,226,255,.5)}
.article-body code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;background:rgba(150,190,255,.1);padding:2px 7px;border-radius:5px;font-size:.92em;color:var(--cyan-glow)}
.article-body pre{margin:24px 0;background:var(--bg-elevated);border:1px solid var(--line);padding:22px;border-radius:14px;overflow-x:auto}
.article-body pre code{background:none;padding:0}
.article-foot{margin-top:44px;padding-top:32px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;align-items:center;gap:14px}
.article-foot-cat{color:var(--text-low);font-size:14px}
.article-foot-actions{display:flex;flex-wrap:wrap;gap:10px;margin-left:auto}
.article-divider{margin-top:44px;padding-top:32px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;align-items:center;gap:12px}
.article-divider-text{color:var(--text-low);font-size:14px}
.empty-state{background:var(--bg-panel);border:1px solid var(--line);border-radius:24px;padding:72px 32px;text-align:center}
.empty-icon{width:72px;height:72px;border-radius:50%;display:grid;place-items:center;margin:0 auto 22px;background:var(--glass-bg);border:1px solid var(--glass-border)}
.empty-state h2{color:var(--text-hi);font-size:28px;font-weight:700;margin-bottom:8px}
.empty-state p{color:var(--text-low);margin-bottom:26px}
.continue-section{padding:0 0 70px}
.continue-head{display:flex;align-items:end;justify-content:space-between;margin-bottom:24px;gap:16px}
.continue-title{font-size:24px;font-weight:700;color:var(--text-hi)}
.continue-sub{color:var(--text-low);font-size:14px}
.continue-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.continue-card{background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:18px;overflow:hidden;display:flex;align-items:stretch;transition:all .25s ease}
.continue-card:hover{border-color:rgba(117,226,255,.42);transform:translateY(-5px)}
.continue-thumb{flex:0 0 150px;position:relative;overflow:hidden;background:var(--bg-elevated)}
.continue-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.continue-card:hover .continue-thumb img{transform:scale(1.04)}
.continue-body{flex:1;padding:22px 24px;display:flex;flex-direction:column}
.continue-body h3{color:var(--text-hi);font-size:18px;font-weight:700;margin-bottom:8px}
.continue-body p{font-size:14px;color:var(--text-low);flex:1}
.continue-link{margin-top:16px;font-size:14px;color:var(--brand);display:inline-flex;align-items:center;gap:6px}
.continue-card:hover .continue-link{color:var(--cyan-glow)}
.continue-link i{transition:transform .25s}
.continue-card:hover .continue-link i{transform:translateX(4px)}
.cta-banner{border-radius:24px;overflow:hidden;position:relative;margin-bottom:80px;padding:54px 40px;text-align:center;border:1px solid var(--line)}
.cta-banner::before{content:"";position:absolute;inset:0;background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;opacity:.35}
.cta-banner::after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(6,10,23,.92),rgba(10,20,42,.75))}
.cta-content{position:relative;z-index:2}
.cta-content h2{color:var(--text-hi);font-size:30px;font-weight:800;margin-bottom:10px}
.cta-content p{color:var(--text-mid);font-size:16px;max-width:560px;margin:0 auto 28px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
.site-footer{position:relative;z-index:2;background:rgba(8,14,28,.75);border-top:1px solid var(--line);padding:60px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:44px;margin-bottom:44px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{font-size:14px;color:var(--text-low);line-height:1.8;max-width:320px}
.footer-title{font-size:14px;color:var(--text-hi);font-weight:700;margin-bottom:18px;letter-spacing:.04em}
.footer-links li+li,.footer-contact li+li{margin-top:11px}
.footer-links a,.footer-contact a{font-size:14px;color:var(--text-low);line-height:1.55;transition:color .2s}
.footer-links a:hover,.footer-contact a:hover{color:var(--cyan-glow)}
.footer-contact li{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text-low)}
.footer-bottom{padding-top:24px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;color:var(--text-low);font-size:13px}
.footer-bottom p{color:var(--text-low)}
.footer-bottom a{color:var(--text-mid)}
.footer-bottom a:hover{color:var(--cyan-glow)}
@media (max-width:1024px){
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:32px}
}
@media (max-width:860px){
  :root{--header-h:60px}
  .main-nav{display:none}
  .search-btn.open-mobile{display:inline-flex;width:40px;height:40px;align-items:center;justify-content:center;border-radius:10px;border:1px solid var(--line);background:var(--glass-bg);color:var(--text-mid)}
  .hamburger{display:flex}
  .article-hero{padding:52px 0 42px}
  .article-main-content{padding:34px 28px}
  .article-body-wrap{padding:48px 0}
}
@media (max-width:640px){
  .container{width:min(100% - 32px,var(--container))}
  .brand-name{font-size:17px}
  .brand-tagline{display:none}
  .header-actions .btn-primary{display:none}
  .article-hero h1{font-size:28px}
  .article-meta{font-size:13px;gap:10px 12px}
  .article-preview{font-size:15px}
  .continue-grid{grid-template-columns:1fr}
  .continue-thumb{flex:0 0 120px}
  .cta-banner{padding:42px 22px;margin-bottom:56px}
  .cta-actions .btn,.cta-actions{width:100%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-bottom{flex-direction:column}
}
@media (max-width:480px){
  .article-main-content{padding:26px 20px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .continue-thumb{display:none}
  .breadcrumb li:last-child{max-width:190px}
}

/* roulang page: category2 */
:root {
  --bg-deep: #060A17;
  --bg-panel: #0B1120;
  --bg-elevated: #101A30;
  --glass-bg: rgba(150, 190, 255, 0.06);
  --glass-border: rgba(170, 210, 255, 0.16);
  --glass-blur: blur(18px) saturate(140%);
  --brand: #2FB6FF;
  --brand-strong: #0088FF;
  --cyan-glow: #75E2FF;
  --text-hi: #F2F7FF;
  --text-mid: #B4C5DD;
  --text-low: #7386A5;
  --line: rgba(190, 215, 255, 0.12);
  --warn-accent: #FFB347;
  --cta-amber: #FF9F4B;
  --gradient-main: linear-gradient(135deg, #006EFF 0%, #35C4FF 60%);
  --gradient-glow: linear-gradient(135deg, #007BFF, #49D3FF);
  --radius-sm: 6px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --container: 1200px;
  --shadow-card: 0 18px 50px rgba(0, 0, 0, 0.35), inset 0 0 0 rgba(255,255,255,0.04);
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg-deep);
  color: var(--text-mid);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
}
img {
  max-width: 100%;
  display: block;
}
button, input {
  font: inherit;
  border: none;
  outline: none;
}
ul, ol {
  list-style: none;
}
.container {
  width: min(100% - 48px, var(--container));
  margin-left: auto;
  margin-right: auto;
}
.icon {
  width: 1em;
  height: 1em;
  fill: none;
  stroke: currentColor;
}
.brand-mark {
  display: inherit;
}

/* ============ buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  line-height: 1.2;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--gradient-main);
  color: #fff;
  box-shadow: 0 10px 24px rgba(0, 128, 255, 0.25);
}
.btn-primary:hover {
  box-shadow: 0 12px 36px rgba(0, 160, 255, 0.4);
  transform: translateY(-1px);
  color: #fff;
}
.btn-primary:active {
  transform: scale(0.98);
}
.btn-ghost {
  background: rgba(150, 190, 255, 0.06);
  border: 1px solid rgba(170, 210, 255, 0.22);
  color: var(--text-hi);
}
.btn-ghost:hover {
  background: rgba(150, 190, 255, 0.12);
  border-color: rgba(117, 226, 255, 0.55);
  color: var(--cyan-glow);
}
.btn-light {
  background: rgba(255,255,255,0.94);
  color: #0B1120;
}
.btn-light:hover {
  background: #fff;
  box-shadow: 0 12px 34px rgba(0,180,255,.25);
}
.btn-glow {
  background: var(--gradient-glow);
  color: #fff;
  box-shadow: 0 10px 34px rgba(0, 150, 255, 0.35);
  min-height: 50px;
  padding: 15px 38px;
}
.btn-glow:hover {
  box-shadow: 0 18px 40px rgba(0, 170, 255, 0.5);
  transform: translateY(-2px);
  color: #fff;
}
.btn-glow:active {
  transform: scale(.98) translateY(0);
}
.btn:disabled {
  opacity: .45;
  pointer-events: none;
}

/* ============ header ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(6,10,23,.76);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom: 1px solid var(--line);
  transition: background .3s ease, border-color .3s ease;
}
.site-header.is-scrolled {
  background: rgba(6,10,23,.9);
  border-bottom-color: rgba(170,210,255,.2);
}
.header-inner {
  display: flex;
  align-items: center;
  min-height: 76px;
  gap: 28px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  flex-shrink: 0;
}
.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 13px;
  background: linear-gradient(135deg, rgba(0,110,255,.25), rgba(53,196,255,.22));
  border: 1px solid rgba(117,226,255,.4);
  color: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  box-shadow: inset 0 0 18px rgba(47,182,255,.15), 0 0 18px rgba(47,182,255,.08);
}
.brand-mark .icon {
  width: 1.2em;
  height: 1.2em;
}
.brand-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.brand-name {
  color: var(--text-hi);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: .01em;
  line-height: 1.3;
}
.brand-tagline {
  color: var(--text-low);
  font-size: 11px;
  letter-spacing: .12em;
  line-height: 1.4;
}
.main-nav {
  margin-left: auto;
}
.main-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
}
.main-nav a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  color: var(--text-mid);
  font-weight: 500;
  border-radius: 999px;
  font-size: 15px;
  transition: color .2s ease, background .2s ease;
  position: relative;
}
.main-nav a:hover {
  color: var(--text-hi);
  background: rgba(150,190,255,.05);
}
.main-nav a.active {
  color: var(--text-hi);
  background: rgba(47,182,255,.1);
}
.main-nav a.active::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 10px rgba(117,226,255,.8);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}
.header-actions .btn {
  padding: 10px 22px;
  min-height: 40px;
  font-size: 14px;
}
.link-line {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  color: var(--brand);
  transition: color .2s ease;
}
.link-line:hover {
  color: var(--cyan-glow);
}
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(150,190,255,.06);
  border: 1px solid var(--line);
  color: var(--text-hi);
  font-size: 22px;
  cursor: pointer;
}
.nav-toggle:hover {
  border-color: var(--glass-border);
  background: rgba(150,190,255,.12);
}

/* ============ page hero ============ */
.page-hero {
  position: relative;
  padding: 88px 0 76px;
  overflow: hidden;
  background:
    radial-gradient(circle at 80% 10%, rgba(47,182,255,.16), transparent 36%),
    radial-gradient(circle at 10% 30%, rgba(0,110,255,.12), transparent 30%),
    var(--bg-deep);
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  opacity: .24;
  filter: brightness(.5) saturate(.8);
}
.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6,10,23,.28) 0%, rgba(6,10,23,.72) 100%);
}
.page-hero .container {
  position: relative;
  z-index: 2;
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--text-low);
  margin-bottom: 22px;
}
.breadcrumb a {
  color: var(--text-low);
  transition: color .2s ease;
}
.breadcrumb a:hover {
  color: var(--brand);
}
.breadcrumb .sep {
  opacity: .6;
}
.hero-caption {
  max-width: 880px;
}
.page-hero h1 {
  font-size: clamp(32px, 4.2vw, 50px);
  line-height: 1.25;
  font-weight: 800;
  color: var(--text-hi);
  letter-spacing: 0.01em;
  margin-bottom: 22px;
}
.page-hero h1 .grad {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.page-hero .lead {
  font-size: 17px;
  line-height: 1.9;
  color: var(--text-mid);
  max-width: 920px;
  margin-bottom: 28px;
}
.hero-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 6px;
}
.hero-guide-chips {
  margin-top: 42px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
  background: rgba(150,190,255,.05);
  border: 1px solid var(--line);
  padding: 14px 18px;
  border-radius: 999px;
  width: fit-content;
  max-width: 100%;
}
.hero-guide-chips .chip-title {
  font-size: 13px;
  color: var(--text-low);
  padding-left: 4px;
  flex-shrink: 0;
}
.guide-chip {
  font-size: 13px;
  color: var(--text-mid);
  padding: 5px 14px;
  border-radius: 999px;
  background: rgba(47,182,255,.09);
  transition: background .2s ease, color .2s ease;
}
.guide-chip:hover {
  background: rgba(117,226,255,.15);
  color: var(--text-hi);
}

/* ============ page generic sections ============ */
.page-section {
  padding: 74px 0 84px;
}
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 30px;
  margin-bottom: 40px;
}
.section-head h2 {
  font-size: 29px;
  font-weight: 800;
  color: var(--text-hi);
  line-height: 1.4;
}
.section-head .tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--brand);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-head p {
  color: var(--text-low);
  font-size: 15px;
  max-width: 480px;
}
.section-head-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--brand);
  font-size: 14px;
  font-weight: 500;
  transition: gap .2s ease, color .2s ease;
  white-space: nowrap;
}
.section-head-link:hover {
  color: var(--cyan-glow);
  gap: 12px;
}
.panel {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  box-shadow: var(--shadow-card);
}
body.dark {
  color: var(--text-low);
}

/* ============ overview strip ============ */
.overview-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: rgba(10,20,40,.4);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 20px 0;
  margin: -12px 0 0;
  overflow: hidden;
}
.ov-item {
  padding: 16px 30px;
  display: flex;
  align-items: center;
  gap: 14px;
  border-left: 1px solid var(--line);
}
.ov-item:first-child {
  border-left: none;
}
.ov-icon {
  width: 50px;
  height: 50px;
  flex-shrink: 0;
  border-radius: 16px;
  background: rgba(47,182,255,.1);
  border: 1px solid rgba(47,182,255,.2);
  color: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}
.ov-item strong {
  display: block;
  color: var(--text-hi);
  font-size: 17px;
  margin-bottom: 5px;
}
.ov-item span {
  color: var(--text-low);
  font-size: 13px;
  line-height: 1.6;
  display: inline-block;
}

/* ============ split layout ============ */
.layout-split {
  display: grid;
  grid-template-columns: 250px minmax(0,1fr);
  gap: 40px;
  margin-top: 80px;
}
.doc-nav-wrap {
  position: sticky;
  top: 110px;
  height: fit-content;
  padding: 6px 14px;
}
.doc-nav-wrap h3 {
  font-size: 13px;
  color: var(--text-low);
  color: #6E83A8;
  font-weight: 600;
  letter-spacing: .12em;
  margin: 12px 12px 16px;
}
.doc-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-left: 1px solid rgba(190,215,255,.12);
  padding-left: 12px;
}
.doc-nav a {
  display: block;
  padding: 10px 16px;
  color: var(--text-low);
  font-size: 15px;
  font-weight: 500;
  border-radius: 12px;
  position: relative;
  transition: all .2s ease;
  border-left: 2px solid transparent;
  margin-left: -14px;
}
.doc-nav a:hover {
  color: var(--text-hi);
  background: rgba(47,182,255,.06);
}
.doc-nav a.active {
  color: var(--cyan-glow);
  border-left-color: var(--brand);
  background: rgba(47,182,255,.08);
  padding-left: 20px;
}
.doc-main {
  min-width: 0;
}
.anchor-block {
  scroll-margin-top: 120px;
  margin-bottom: 48px;
}
.anchor-block:last-child {
  margin-bottom: 0;
}
.text-block h2 {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 26px;
  font-weight: 800;
  color: var(--text-hi);
  margin-bottom: 20px;
  line-height: 1.4;
}
.text-block h2 .index-num {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--gradient-main);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  box-shadow: 0 8px 22px rgba(0,128,255,.32);
}
.text-block > p {
  margin-bottom: 26px;
  color: var(--text-mid);
  font-size: 16px;
  line-height: 1.9;
}
.text-block > p strong {
  color: var(--text-hi);
  font-weight: 600;
}

/* info cards */
.info-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 18px;
  margin-top: 18px;
}
.info-card {
  background: rgba(16,26,48,.5);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 26px 24px;
  transition: transform .25s ease, border-color .25s ease, background .25s ease;
  position: relative;
  overflow: hidden;
}
.info-card::after {
  content: "";
  position: absolute;
  right: -30px;
  top: -30px;
  width: 90px;
  height: 90px;
  border-radius: 50%;
  background: rgba(47,182,255,.1);
  filter: blur(10px);
  opacity: 0;
  transition: opacity .25s ease;
}
.info-card:hover {
  transform: translateY(-6px);
  background: rgba(20,33,60,.6);
  border-color: rgba(117,226,255,.3);
}
.info-card:hover::after {
  opacity: 1;
}
.info-card .card-icon {
  font-size: 26px;
  color: var(--brand);
  margin-bottom: 20px;
}
.info-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-hi);
  margin-bottom: 10px;
  line-height: 1.5;
}
.info-card p {
  color: var(--text-low);
  font-size: 14px;
  line-height: 1.8;
}

/* step flow */
.flow-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 18px;
}
.flow-step {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  background: rgba(16,26,48,.4);
  border: 1px solid rgba(190,215,255,.08);
  border-radius: 18px;
  padding: 20px 22px;
  transition: background .2s ease, border-color .2s ease;
}
.flow-step:hover {
  border-color: rgba(170,210,255,.2);
  background: rgba(20,34,62,.55);
}
.flow-num {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  border-radius: 12px;
  background: rgba(47,182,255,.1);
  border: 1px solid rgba(47,182,255,.24);
  color: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 15px;
}
.flow-body strong {
  display: block;
  font-size: 17px;
  font-weight: 700;
  color: var(--text-hi);
  margin-bottom: 5px;
}
.flow-body p, .flow-body span {
  color: var(--text-low);
  font-size: 14px;
  line-height: 1.8;
  max-width: 780px;
}

/* scenes grid */
.scene-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 24px;
  margin-top: 20px;
}
.scene-card {
  display: flex;
  gap: 22px;
  padding: 28px;
  background: rgba(10,20,40,.42);
  border: 1px solid rgba(190,215,255,.1);
  border-radius: 22px;
  transition: transform .25s ease, border-color .25s ease;
}
.scene-card:hover {
  border-color: rgba(117,226,255,.3);
  transform: translateY(-4px);
}
.scene-icon {
  flex: 0 0 auto;
  width: 54px;
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 25px;
  background: rgba(47,182,255,.1);
  border-radius: 16px;
  color: var(--brand);
}
.scene-info h3 {
  color: var(--text-hi);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}
.scene-info p {
  color: var(--text-low);
  font-size: 14px;
  line-height: 1.85;
}
.scene-card picture {
  margin-left: auto;
}
.media-card {
  position: relative;
  overflow: hidden;
  border-radius: 18px;
}
.media-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  filter: brightness(.62);
}

/* 2 col media split */
.media-row-cols {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 24px;
  align-items: stretch;
  max-width: none;
  margin-top: 20px;
}
.tips-box {
  padding: 28px 30px;
  border-radius: 20px;
  background: rgba(16,26,48,.42);
  border: 1px solid rgba(190,215,255,.1);
  height: 100%;
}
.tips-box h3 {
  color: var(--text-hi);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 18px;
}
.tips-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.tips-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--text-low);
  font-size: 14px;
  line-height: 1.8;
}
.tips-list .tip-check {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(47,182,255,.14);
  color: var(--brand);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 3px;
}
.tips-list .tip-check svg {
  width: 13px;
  height: 13px;
}
.visual-panel {
  border-radius: 20px;
  overflow: hidden;
  min-height: 260px;
  border: 1px solid var(--line);
  position: relative;
}
.visual-panel img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 260px;
}
.visual-panel .visual-caption {
  position: absolute;
  left: 18px; right: 18px;
  bottom: 14px;
  padding: 13px 16px;
  border-radius: 13px;
  background: rgba(6,10,23,.6);
  border: 1px solid rgba(170,210,255,.14);
  backdrop-filter: blur(10px);
  font-size: 13px;
  color: #dce8fa;
}

/* ============ FAQ ============ */
.faq-section {
  margin-top: 20px;
}
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq-accordion {
  background: rgba(10,25,45,.46);
  border: 1px solid rgba(190,215,255,.1);
  border-radius: 18px;
  overflow: hidden;
}
.faq-accordion summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 21px 24px;
  color: var(--text-hi);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  transition: background .2s ease;
}
.faq-accordion summary::-webkit-details-marker {
  display: none;
}
.faq-accordion summary:hover {
  background: rgba(150,190,255,.04);
}
.faq-accordion .acc-icon {
  width: 28px;
  height: 28px;
  flex: 0 0 auto;
  margin-left: auto;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand);
  background: rgba(47,182,255,.1);
  font-size: 18px;
  font-weight: 500;
  transition: transform .25s ease, background .25s ease, color .25s ease;
}
.faq-accordion[open] .acc-icon {
  transform: rotate(45deg);
  background: var(--brand);
  color: #fff;
}
.faq-answer {
  padding: 0 24px 24px 68px;
  color: var(--text-low);
  font-size: 15px;
  line-height: 1.9;
}
.faq-answer p:first-child {
  margin-top: 0;
}

/* ============ CTA ============ */
.cta-section {
  padding: 40px 0 96px;
}
.cta-panel {
  position: relative;
  border-radius: 28px;
  overflow: hidden;
  padding: 68px 56px;
  text-align: center;
  background: rgba(8,16,32,.94), url('/assets/images/backpic/back-2.png');
}
.cta-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  opacity: .92;
}
.cta-panel::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(2,8,22,.88), rgba(8,30,60,.75));
}
.cta-panel .cta-content {
  position: relative;
  z-index: 2;
}
.cta-panel h2 {
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 14px;
}
.cta-panel p {
  color: #B8C9E4;
  font-size: 15px;
  margin: 0 auto 30px;
  max-width: 620px;
}
.cta-panel .btn-group {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ============ footer ============ */
.site-footer {
  border-top: 1px solid rgba(190,215,255,.08);
  background: #050916;
  padding: 68px 0 30px;
}
.site-footer p {
  color: var(--text-low);
  font-size: 14px;
  line-height: 1.9;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 0.8fr 1fr 1fr;
  gap: 50px;
  margin-bottom: 54px;
}
.footer-brand .brand {
  margin-bottom: 18px;
}
.footer-brand p {
  max-width: 330px;
}
.footer-title {
  color: var(--text-hi);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 20px;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  color: var(--text-low);
  font-size: 14px;
  line-height: 1.6;
  transition: color .2s ease;
}
.footer-links a:hover {
  color: var(--cyan-glow);
}
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--text-low);
  font-size: 14px;
}
.footer-contact a {
  color: var(--text-low);
  transition: color .2s ease;
}
.footer-contact a:hover {
  color: var(--cyan-glow);
}
.footer-contact svg {
  width: 18px;
  height: 18px;
  margin-top: 3px;
  color: var(--brand);
}
.footer-bottom {
  padding-top: 28px;
  border-top: 1px solid rgba(190,215,255,.07);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  justify-content: space-between;
  align-items: center;
}
.footer-bottom p, .footer-bottom span {
  color: #4E5E76;
  font-size: 13px;
}

/* ============ scrollbar / helpers ============ */
::selection {
  background: rgba(47,182,255,.3);
  color: #fff;
}
.section-divider-line {
  background: linear-gradient(90deg, transparent, rgba(47,182,255,.18), transparent);
  height: 1px;
  width: 100%;
}

/* ============ responsive ============ */
@media (max-width: 1024px) {
  .page-section {
    padding: 62px 0 70px;
  }
  .layout-split {
    grid-template-columns: 1fr;
    gap: 32px;
    margin-top: 48px;
  }
  .doc-nav-wrap {
    position: static;
    padding: 0;
    margin-bottom: 12px;
  }
  .doc-nav-wrap h3 {
    margin: 0 0 14px;
  }
  .doc-nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px;
    border-left: none;
    border: none;
    padding-left: 0;
  }
  .doc-nav a {
    margin-left: 0;
    padding: 8px 14px;
    border: 1px solid var(--line);
  }
  .doc-nav a.active {
    border-left-color: var(--brand);
    background: rgba(47,182,255,.1);
    padding-left: 14px;
  }
  .ov-item {
    padding: 14px 22px;
  }
  .ov-item span {
    font-size: 12px;
  }
  .cta-panel {
    padding: 52px 30px;
  }
}
@media (max-width: 768px) {
  .container {
    width: min(100% - 32px, 1200px);
  }
  .header-inner {
    min-height: 64px;
    gap: 12px;
  }
  .brand-name {
    font-size: 18px;
  }
  .brand-mark {
    width: 38px;
    height: 38px;
    font-size: 18px;
  }
  .header-actions .btn {
    display: inline-flex;
    padding: 9px 14px;
    font-size: 13px;
  }
  .main-nav {
    display: none;
    position: fixed;
    top: 0;
    right: 0;
    width: min(320px, 84vw);
    height: 100vh;
    background: rgba(6,10,23,.96);
    backdrop-filter: blur(22px);
    border-left: 1px solid var(--line);
    padding: 88px 28px 40px;
    margin-left: 0;
    z-index: 90;
    overflow: auto;
  }
  .main-nav.open {
    display: block;
  }
  .main-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
  .main-nav a {
    width: 100%;
    padding: 14px 16px;
    font-size: 18px;
    justify-content: flex-start;
  }
  .main-nav a.active::before {
    content: none;
  }
  .main-nav a.active {
    box-shadow: inset 2px 0 0 var(--brand);
  }
  .nav-toggle {
    display: flex;
  }
  .toggle-backdrop {
    display: none;
  }
  .toggle-backdrop.on {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(2,5,12,.55);
    backdrop-filter: blur(4px);
    z-index: 80;
  }
  .page-hero {
    padding: 64px 0 58px;
  }
  .page-hero h1 {
    font-size: 32px;
    line-height: 1.35;
  }
  .page-hero .lead {
    font-size: 15px;
  }
  .hero-guide-chips {
    border-radius: 16px;
    padding: 14px 16px;
    width: 100%;
  }
  .overview-strip {
    grid-template-columns: repeat(2, 1fr);
    gap: 0;
  }
  .ov-item:nth-child(3) {
    border-left: none;
  }
  .ov-item {
    padding: 18px 14px;
    border-top: 1px solid var(--line);
  }
  .ov-item:nth-child(3), .ov-item:nth-child(4) {
    border-top: 1px solid var(--line);
  }
  .ov-icon {
    width: 46px;
    height: 46px;
    font-size: 20px;
  }
  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 28px;
  }
  .section-head h2 {
    font-size: 24px;
  }
  .info-grid {
    grid-template-columns: 1fr;
  }
  .scene-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .scene-card {
    flex-direction: column;
    padding: 22px;
  }
  .media-row-cols {
    grid-template-columns: 1fr;
  }
  .faq-answer {
    padding-left: 24px;
    padding-right: 18px;
  }
  .cta-panel {
    padding: 46px 20px;
  }
  .cta-panel h2 {
    font-size: 26px;
  }
  .cta-panel .btn-group .btn {
    width: 100%;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px 24px;
    margin-bottom: 30px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}
@media (max-width: 520px) {
  .page-hero h1 {
    font-size: 28px;
  }
  .page-hero .lead {
    font-size: 15px;
  }
  .hero-tools .btn {
    width: 100%;
  }
  .overview-strip {
    grid-template-columns: 1fr 1fr;
  }
  .ov-item {
    padding: 14px 12px;
    border-left: none;
    flex-direction: column;
    align-items: flex-start;
  }
  .cta-panel {
    padding: 42px 18px;
  }
  .cta-panel .btn-group {
    flex-direction: column;
  }
  .footer-bottom {
    gap: 12px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* ============ temporary render style for index nav snippet ============ */
.skip-anchor {
  display: none;
}