/* roulang page: index */
/* ========== Design Variables ========== */
:root {
  --bg-root: #0B0F1A;
  --bg-card: #121A2B;
  --bg-card-hover: #162032;
  --bg-input: #0F1626;
  --primary: #22D3EE;
  --secondary: #A78BFA;
  --text-main: #F1F5F9;
  --text-sub: #94A3B8;
  --border-color: rgba(148, 163, 184, 0.18);
  --border-light: rgba(148, 163, 184, 0.12);
  --warning: #F43F5E;
  --gradient: linear-gradient(135deg, #22D3EE 0%, #A78BFA 100%);
  --gradient-soft: linear-gradient(135deg, rgba(34,211,238,0.12) 0%, rgba(167,139,250,0.12) 100%);
  --radius-card: 20px;
  --radius-medium: 12px;
  --radius-small: 10px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-card-hover: 0 14px 44px rgba(0, 0, 0, 0.5);
  --glow-cyan: 0 0 24px rgba(34, 211, 238, 0.18);
  --glow-cyan-strong: 0 0 32px rgba(34, 211, 238, 0.35);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.2s ease;
  --header-height: 72px;
  --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", sans-serif;
  --font-number: "Inter", "DIN Alternate", ui-sans-serif, "SF Pro Display", tabular-nums;
}

/* ========== Reset & Base ========== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  background: var(--bg-root);
  color: var(--text-main);
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
  cursor: pointer;
}
a:hover {
  color: #67E8F9;
}
button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
}
input, select, textarea {
  font-family: inherit;
  font-size: 14px;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section-pad {
  padding-top: 96px;
  padding-bottom: 96px;
}
.grid-container {
  max-width: 1200px !important;
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 96px;
  height: 40px;
  padding: 0 24px;
  border-radius: var(--radius-small);
  font-size: 15px;
  font-weight: 600;
  line-height: 40px;
  text-align: center;
  white-space: nowrap;
  transition: all var(--transition);
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--gradient);
  color: #FFFFFF !important;
  box-shadow: var(--glow-cyan);
}
.btn-primary:hover {
  box-shadow: var(--glow-cyan-strong);
  transform: translateY(-2px);
  color: #FFFFFF !important;
  filter: brightness(1.08);
}
.btn-primary:active {
  transform: translateY(0);
  filter: brightness(0.96);
}
.btn-ghost {
  background: transparent;
  color: var(--text-main);
  border: 1px solid rgba(34, 211, 238, 0.5);
}
.btn-ghost:hover {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--glow-cyan);
  transform: translateY(-2px);
}
.btn-ghost:active {
  transform: translateY(0);
}
.btn-lg {
  height: 46px;
  line-height: 46px;
  padding: 0 32px;
  font-size: 16px;
  border-radius: var(--radius-medium);
}
.btn-block {
  width: 100%;
}
.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ========== Header / Navigation ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(11, 15, 26, 0.85);
  border-bottom: 1px solid var(--border-light);
  transition: background 0.3s ease, backdrop-filter 0.3s ease, box-shadow 0.3s ease;
  backdrop-filter: blur(0px);
}
.site-header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, #22D3EE 30%, #A78BFA 70%, transparent 100%);
  opacity: 0.8;
}
.site-header.scrolled {
  background: rgba(11, 15, 26, 0.92);
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  position: relative;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 18px;
  color: #FFFFFF;
  box-shadow: 0 0 16px rgba(34, 211, 238, 0.3);
}
.brand-text {
  font-size: 20px;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.5px;
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-sub);
  padding: 8px 2px;
  position: relative;
  transition: color var(--transition-fast);
}
.nav-link::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 100%;
  height: 3px;
  border-radius: var(--radius-pill);
  background: var(--gradient);
  box-shadow: 0 0 12px rgba(34, 211, 238, 0.5);
  transition: transform 0.3s ease;
}
.nav-link:hover {
  color: #FFFFFF;
}
.nav-link:hover::after,
.nav-link.active::after {
  transform: translateX(-50%) scaleX(1);
}
.nav-link.active {
  color: #FFFFFF;
  font-weight: 600;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: 8px;
  background: rgba(34, 211, 238, 0.1);
  transition: background var(--transition-fast);
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.nav-toggle:hover {
  background: rgba(34, 211, 238, 0.2);
}
.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ========== Hero ========== */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--header-height) + 40px);
  padding-bottom: 60px;
  overflow: hidden;
  background: var(--bg-root);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  z-index: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(11, 15, 26, 0.95) 0%, rgba(11, 15, 26, 0.62) 50%, rgba(11, 15, 26, 0.95) 100%);
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding-top: 30px;
}
.hero-tag {
  display: inline-block;
  padding: 6px 18px;
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.3);
  border-radius: var(--radius-pill);
  font-size: 13px;
  color: var(--primary);
  letter-spacing: 1px;
  margin-bottom: 24px;
  font-weight: 500;
}
.hero-title {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.5px;
  margin-bottom: 20px;
  text-shadow: 0 0 30px rgba(34, 211, 238, 0.25);
}
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  max-width: 680px;
  margin: 0 auto 36px;
  font-size: 18px;
  line-height: 1.8;
  color: var(--text-sub);
}
.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.hero-badges {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.stat-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 160px;
  padding: 20px 24px;
  border-radius: var(--radius-card);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(8px);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.stat-badge:hover {
  border-color: var(--primary);
  box-shadow: var(--glow-cyan);
  transform: translateY(-4px);
}
.stat-num {
  font-family: var(--font-number);
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}
.stat-label {
  font-size: 13px;
  color: var(--text-sub);
  margin-top: 6px;
}
.hero-trust {
  position: absolute;
  right: 24px;
  bottom: 24px;
  z-index: 2;
  display: flex;
  gap: 10px;
}
.trust-badge {
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 12px;
  color: var(--text-sub);
  display: flex;
  align-items: center;
  gap: 6px;
}
.trust-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 8px var(--primary);
}

/* ========== Section Heading ========== */
.section-head {
  margin-bottom: 48px;
}
.section-head h2 {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 12px;
}
.section-head .section-desc {
  font-size: 15px;
  color: var(--text-sub);
  max-width: 560px;
  line-height: 1.7;
}
.section-head.center {
  text-align: center;
}
.section-head.center .section-desc {
  margin: 0 auto;
}

/* ========== Timeline ========== */
.timeline-section {
  background: var(--bg-root);
}
.timeline-wrap {
  position: relative;
  padding: 20px 0;
}
.timeline-wrap::before {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  top: 0;
  bottom: 0;
  width: 2px;
  border-left: 2px dashed rgba(148, 163, 184, 0.25);
}
.timeline-item {
  position: relative;
  width: 50%;
  padding: 0 48px 56px;
}
.timeline-item:nth-child(odd) {
  left: 0;
  text-align: right;
}
.timeline-item:nth-child(even) {
  left: 50%;
  text-align: left;
}
.timeline-item:last-child {
  padding-bottom: 8px;
}
.timeline-dot {
  position: absolute;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gradient);
  box-shadow: 0 0 12px rgba(34, 211, 238, 0.5);
  z-index: 2;
}
.timeline-item:nth-child(odd) .timeline-dot {
  right: -6px;
}
.timeline-item:nth-child(even) .timeline-dot {
  left: -6px;
}
.timeline-tag {
  display: inline-block;
  padding: 3px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--primary);
  background: rgba(34, 211, 238, 0.06);
  color: var(--primary);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}
.timeline-item h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-main);
}
.timeline-item p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  max-width: 380px;
}
.timeline-item:nth-child(odd) p {
  margin-left: auto;
}
.timeline-item:hover .timeline-dot {
  box-shadow: 0 0 20px rgba(34, 211, 238, 0.8);
}

/* ========== Features ========== */
.features-section {
  background: linear-gradient(180deg, var(--bg-root) 0%, #0E1420 100%);
}
.card-feature {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  padding: 32px;
  position: relative;
  height: 100%;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  border: 1px solid transparent;
}
.card-feature::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), var(--secondary), transparent);
  opacity: 0.6;
  transition: opacity var(--transition);
}
.card-feature:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
  background: var(--bg-card-hover);
}
.card-feature:hover::before {
  opacity: 1;
}
.feature-badge {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgba(34, 211, 238, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
  border: 1px solid rgba(34, 211, 238, 0.25);
  font-family: var(--font-number);
}
.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--gradient-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  border: 1px solid rgba(34, 211, 238, 0.15);
}
.feature-icon svg {
  width: 26px;
  height: 26px;
  stroke: var(--primary);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.card-feature h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-main);
}
.card-feature p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 24px;
}
.feature-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: gap var(--transition-fast);
}
.feature-more:hover {
  gap: 12px;
}

/* ========== Comparison ========== */
.compare-section {
  background: var(--bg-root);
}
.compare-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}
.compare-table {
  width: 100%;
  min-width: 720px;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--bg-card);
  border-radius: var(--radius-card);
  overflow: hidden;
}
.compare-table th,
.compare-table td {
  padding: 18px 20px;
  text-align: center;
  font-size: 14px;
  border-bottom: 1px solid var(--border-light);
}
.compare-table th:first-child,
.compare-table td:first-child {
  text-align: left;
  font-weight: 600;
  color: var(--text-main);
  width: 180px;
}
.compare-table thead th {
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.12), rgba(167, 139, 250, 0.12));
  color: var(--text-main);
  font-size: 15px;
  font-weight: 600;
  padding-top: 22px;
  padding-bottom: 22px;
  position: relative;
}
.compare-table tbody tr:last-child td {
  border-bottom: none;
}
.compare-table tbody tr:hover td {
  background: rgba(34, 211, 238, 0.03);
}
.compare-recommend {
  border-left: 2px solid rgba(34, 211, 238, 0.3);
  border-right: 2px solid rgba(34, 211, 238, 0.3);
  position: relative;
  background: rgba(34, 211, 238, 0.02);
}
.compare-recommend-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 2px 16px;
  border-radius: var(--radius-pill);
  box-shadow: var(--glow-cyan);
  white-space: nowrap;
  z-index: 2;
}
.check-yes {
  color: var(--primary);
  font-weight: 700;
  font-size: 16px;
}
.check-no {
  color: var(--text-sub);
  font-size: 16px;
  opacity: 0.5;
}
.compare-note {
  font-size: 13px;
  color: var(--text-sub);
  margin-top: 16px;
  text-align: center;
}

/* ========== CTA / Form ========== */
.cta-section {
  position: relative;
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.08) 0%, rgba(167, 139, 250, 0.1) 100%);
  overflow: hidden;
}
.cta-card {
  max-width: 720px;
  margin: 0 auto;
  background: var(--bg-card);
  border-radius: var(--radius-card);
  padding: 48px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border-light);
  position: relative;
}
.cta-card h2 {
  font-size: 30px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
}
.cta-sub {
  text-align: center;
  color: var(--text-sub);
  font-size: 14px;
  margin-bottom: 32px;
}
.cta-form .form-row {
  margin-bottom: 20px;
}
.cta-form label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: #FFFFFF;
  margin-bottom: 8px;
}
.cta-form input,
.cta-form select {
  width: 100%;
  height: 46px;
  padding: 0 16px;
  background: var(--bg-input);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: var(--radius-small);
  color: var(--text-main);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
}
.cta-form select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2394A3B8' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
}
.cta-form input:hover,
.cta-form select:hover {
  border-color: rgba(34, 211, 238, 0.4);
}
.cta-form input:focus,
.cta-form select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.15);
}
.cta-form input::placeholder {
  color: #64748B;
  font-size: 14px;
}
.form-privacy {
  font-size: 12px;
  color: var(--text-sub);
  text-align: center;
  margin-top: 12px;
}

/* ========== News / CMS ========== */
.news-section {
  background: var(--bg-root);
}
.news-card-col {
  margin-bottom: 24px;
}
.news-card {
  display: block;
  background: var(--bg-card);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  height: 100%;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  border: 1px solid transparent;
}
.news-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(34, 211, 238, 0.2);
}
.news-cover {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.1), rgba(167, 139, 250, 0.1));
}
.news-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.news-card:hover .news-cover img {
  transform: scale(1.04);
}
.news-cover::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 40%;
  background: linear-gradient(180deg, transparent, rgba(11, 15, 26, 0.6));
}
.news-body {
  padding: 24px;
}
.news-body .tag {
  display: inline-block;
  padding: 2px 12px;
  background: rgba(34, 211, 238, 0.1);
  border-radius: var(--radius-pill);
  font-size: 12px;
  color: var(--primary);
  margin-bottom: 12px;
  border: 1px solid rgba(34, 211, 238, 0.2);
}
.news-body h3 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  color: var(--text-main);
  transition: color var(--transition-fast);
}
.news-card:hover .news-body h3 {
  color: var(--primary);
}
.news-body p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 16px;
}
.news-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-sub);
  border-top: 1px solid var(--border-light);
  padding-top: 14px;
}
.read-more {
  color: var(--primary);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition-fast);
}
.news-card:hover .read-more {
  gap: 8px;
}
.news-empty {
  padding: 60px;
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-card);
  text-align: center;
  color: var(--text-sub);
  font-size: 15px;
}

/* ========== FAQ ========== */
.faq-section {
  background: linear-gradient(180deg, var(--bg-root) 0%, #0E1420 100%);
}
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
  background: rgba(18, 26, 43, 0.5);
}
.faq-item {
  border-bottom: 1px solid var(--border-light);
  transition: background var(--transition-fast);
}
.faq-item:last-child {
  border-bottom: none;
}
.faq-item.active {
  background: rgba(34, 211, 238, 0.04);
}
.faq-item-header {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 56px;
  padding: 16px 20px;
  cursor: pointer;
  transition: background var(--transition-fast);
  width: 100%;
  text-align: left;
}
.faq-item-header:hover {
  background: rgba(34, 211, 238, 0.03);
}
.faq-item-header .faq-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: var(--primary);
  font-weight: 700;
}
.faq-item-header .faq-title {
  flex: 1;
  font-size: 16px;
  font-weight: 600;
  color: #FFFFFF;
  line-height: 1.5;
}
.faq-item-header .faq-toggle {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  position: relative;
  transition: transform 0.3s ease;
}
.faq-item-header .faq-toggle::before,
.faq-item-header .faq-toggle::after {
  content: "";
  position: absolute;
  background: var(--primary);
  border-radius: 2px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.faq-item-header .faq-toggle::before {
  width: 14px;
  height: 2px;
}
.faq-item-header .faq-toggle::after {
  width: 2px;
  height: 14px;
  transition: transform 0.3s ease;
}
.faq-item.active .faq-toggle {
  transform: rotate(45deg);
}
.faq-body {
  display: none;
  padding: 0 20px 20px 58px;
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.75;
}
.faq-item.active .faq-body {
  display: block;
  animation: fadeIn 0.3s ease;
}
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========== Footer ========== */
.site-footer {
  background: #080B12;
  position: relative;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, #22D3EE, #A78BFA, transparent);
}
.footer-main {
  padding: 64px 0 40px;
}
.footer-col {
  margin-bottom: 32px;
}
.footer-col-title {
  font-size: 14px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 16px;
  padding-left: 10px;
  position: relative;
}
.footer-col-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 16px;
  border-radius: var(--radius-pill);
  background: var(--gradient);
}
.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-col ul li {
  line-height: 32px;
  font-size: 14px;
  color: var(--text-sub);
}
.footer-col ul li a {
  color: var(--text-sub);
  transition: color var(--transition-fast);
}
.footer-col ul li a:hover {
  color: #FFFFFF;
}
.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.footer-cert {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 4px;
}
.footer-cert span {
  display: inline-block;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(148, 163, 184, 0.2);
  background: rgba(148, 163, 184, 0.06);
  font-size: 13px;
  color: var(--text-sub);
  white-space: nowrap;
}
.footer-bottom {
  border-top: 1px solid rgba(148, 163, 184, 0.12);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: var(--text-sub);
}
.footer-bottom a {
  color: var(--text-sub);
}
.footer-bottom a:hover {
  color: var(--primary);
}
.footer-brand {
  font-size: 16px;
  font-weight: 700;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

/* ========== Scroll Reveal ========== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========== Responsive ========== */
@media screen and (max-width: 1023px) {
  .section-pad {
    padding-top: 72px;
    padding-bottom: 72px;
  }
  .hero-title {
    font-size: 42px;
  }
  .section-head h2 {
    font-size: 30px;
  }
  .timeline-item {
    padding: 0 32px 48px;
  }
}
@media screen and (max-width: 767px) {
  .section-pad {
    padding-top: 56px;
    padding-bottom: 56px;
  }
  .nav-toggle {
    display: flex;
  }
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(11, 15, 26, 0.98);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 16px 24px;
    display: none;
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(16px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    z-index: 999;
  }
  .nav-menu.open {
    display: flex;
  }
  .nav-link {
    font-size: 16px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-light);
    text-align: center;
  }
  .nav-link:last-child {
    border-bottom: none;
  }
  .nav-link::after {
    display: none;
  }
  .header-actions .btn {
    min-width: 72px;
    padding: 0 16px;
    font-size: 14px;
  }
  .hero {
    min-height: auto;
    padding-top: calc(var(--header-height) + 32px);
    padding-bottom: 80px;
  }
  .hero-title {
    font-size: 32px;
    line-height: 1.4;
  }
  .hero-subtitle {
    font-size: 16px;
    margin-bottom: 28px;
  }
  .stat-badge {
    min-width: 44%;
    padding: 14px 16px;
  }
  .stat-num {
    font-size: 24px;
  }
  .timeline-wrap::before {
    left: 12px;
    transform: none;
  }
  .timeline-item {
    width: 100%;
    left: 0 !important;
    padding: 0 0 40px 40px;
    text-align: left !important;
  }
  .timeline-item:nth-child(odd) .timeline-dot {
    right: auto;
    left: 6px;
  }
  .timeline-item:nth-child(even) .timeline-dot {
    left: 6px;
  }
  .timeline-item p {
    margin-left: 0 !important;
    max-width: 100%;
  }
  .card-feature {
    padding: 24px;
  }
  .cta-card {
    padding: 28px 20px;
  }
  .cta-card h2 {
    font-size: 24px;
  }
  .compare-table th,
  .compare-table td {
    padding: 14px 12px;
    font-size: 13px;
  }
  .hero-trust {
    position: static;
    justify-content: center;
    margin-top: 32px;
  }
  .section-head h2 {
    font-size: 26px;
  }
  .footer-main {
    padding-top: 48px;
  }
}
@media screen and (max-width: 520px) {
  .stat-badge {
    min-width: 46%;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .btn-lg {
    height: 46px;
  }
}

/* roulang page: category1 */
:root{
  --bg-root:#0B0F1A;
  --bg-card:#121A2B;
  --bg-card-hover:#162032;
  --bg-input:#0F1626;
  --primary:#22D3EE;
  --secondary:#A78BFA;
  --brand-gradient:linear-gradient(135deg,#22D3EE 0%,#A78BFA 100%);
  --text-main:#F1F5F9;
  --text-sub:#94A3B8;
  --border-color:rgba(148,163,184,0.18);
  --danger:#F43F5E;
  --radius-lg:20px;
  --radius-md:12px;
  --radius-sm:10px;
  --shadow-card:0 8px 32px rgba(0,0,0,0.35);
  --shadow-hover:0 14px 44px rgba(0,0,0,0.5);
  --glow-primary:0 0 24px rgba(34,211,238,0.18);
  --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Helvetica Neue",sans-serif;
  --font-num:"Inter","DIN Alternate",ui-sans-serif,"Helvetica Neue",sans-serif;
  --transition:all 0.25s cubic-bezier(0.4,0,0.2,1);
}
*,*::before,*::after{
  box-sizing:border-box;margin:0;padding:0;}
html{
  scroll-behavior:smooth;}
body{
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  background:var(--bg-root);
  color:var(--text-main);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;}
a{
  color:inherit;text-decoration:none;transition:var(--transition);}
img{
  max-width:100%;display:block;}
button,input,select,textarea{
  font-family:inherit;font-size:inherit;line-height:inherit;}
ul,ol{
  list-style:none;}
.grid-container{
  max-width:1200px;
  padding-left:24px;
  padding-right:24px;}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 26px;
  border-radius:var(--radius-sm);
  font-size:15px;
  font-weight:600;
  line-height:1.4;
  border:none;
  cursor:pointer;
  transition:var(--transition);
  min-width:96px;
  min-height:40px;}
.btn:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:2px;
  box-shadow:0 0 0 4px rgba(34,211,238,0.2);}
.btn:active{
  transform:scale(0.98);}
.btn-primary{
  background:var(--brand-gradient);
  color:#fff;
  box-shadow:var(--glow-primary);}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 0 32px rgba(34,211,238,0.35);}
.btn-primary:active{
  transform:scale(0.97);}
.btn-ghost{
  background:transparent;
  color:var(--text-main);
  border:1px solid rgba(34,211,238,0.5);}
.btn-ghost:hover{
  border-color:var(--primary);
  box-shadow:var(--glow-primary);
  transform:translateY(-2px);}
.btn-ghost:active{
  transform:scale(0.97);}

/* ===== 头部导航 ===== */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:1000;
  height:72px;
  background:rgba(11,15,26,0.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(148,163,184,0.08);
  transition:var(--transition);}
.site-header.scrolled{
  background:rgba(11,15,26,0.95);
  box-shadow:0 8px 32px rgba(0,0,0,0.45);}
.site-header::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:2px;
  background:linear-gradient(90deg,transparent 0%,#22D3EE 50%,#A78BFA 100%);}
.header-inner{
  height:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;}
.brand-icon{
  width:38px;height:38px;
  border-radius:10px;
  background:var(--brand-gradient);
  color:#fff;
  font-size:20px;
  font-weight:800;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-num);
  box-shadow:0 0 16px rgba(34,211,238,0.3);}
.brand-text{
  font-size:20px;
  font-weight:800;
  background:linear-gradient(135deg,#22D3EE,#A78BFA);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  white-space:nowrap;}
.nav-menu{
  display:flex;
  align-items:center;
  gap:30px;}
.nav-link{
  position:relative;
  font-size:14px;
  font-weight:500;
  color:var(--text-sub);
  padding:8px 2px;
  letter-spacing:0.3px;
  transition:var(--transition);}
.nav-link:hover{
  color:#fff;}
.nav-link::after{
  content:"";
  position:absolute;
  bottom:2px;left:50%;
  transform:translateX(-50%) scaleX(0);
  width:100%;height:2px;
  background:linear-gradient(90deg,#22D3EE,#A78BFA);
  border-radius:2px;
  transform-origin:center;
  transition:var(--transition);
  box-shadow:0 0 8px rgba(34,211,238,0.5);}
.nav-link:hover::after{
  transform:translateX(-50%) scaleX(1);}
.nav-link.active{
  color:#fff;
  font-weight:600;}
.nav-link.active::after{
  transform:translateX(-50%) scaleX(1);
  box-shadow:0 0 12px rgba(34,211,238,0.6);}
.header-actions{
  display:flex;
  align-items:center;
  gap:14px;}
.header-actions .btn{
  padding:10px 22px;
  min-height:40px;
  font-size:14px;}
.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:42px;height:42px;
  background:rgba(148,163,184,0.08);
  border:1px solid rgba(148,163,184,0.15);
  border-radius:10px;
  cursor:pointer;
  padding:10px;
  transition:var(--transition);}
.nav-toggle span{
  display:block;
  height:2px;
  width:100%;
  background:var(--text-main);
  border-radius:2px;
  transition:var(--transition);}
.nav-toggle:hover{
  border-color:var(--primary);}
.nav-toggle:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:2px;}
.nav-toggle.open span:nth-child(1){
  transform:translateY(7px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){
  opacity:0;}
.nav-toggle.open span:nth-child(3){
  transform:translateY(-7px) rotate(-45deg);}

/* ===== 分类页 Hero ===== */
.page-hero{
  position:relative;
  overflow:hidden;
  padding:140px 0 80px;
  background:linear-gradient(90deg,rgba(11,15,26,0.95) 0%,rgba(11,15,26,0.72) 50%,rgba(11,15,26,0.95) 100%),url("/assets/images/coverpic/cover-4.webp") center/cover no-repeat,linear-gradient(135deg,#0B0F1A,#121A2B);}
.page-hero::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;bottom:0;
  background:radial-gradient(ellipse at 30% 40%,rgba(34,211,238,0.14) 0%,transparent 55%),radial-gradient(ellipse at 80% 70%,rgba(167,139,250,0.12) 0%,transparent 55%);}
.page-hero .grid-container{
  position:relative;z-index:2;}
.page-hero-inner{
  max-width:880px;}
.page-hero h1{
  font-size:48px;
  font-weight:800;
  line-height:1.25;
  letter-spacing:0.5px;
  margin-bottom:18px;
  text-shadow:0 0 30px rgba(34,211,238,0.25);}
.page-hero h1 .gradient-text{
  background:linear-gradient(135deg,#22D3EE,#A78BFA);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;}
.page-hero .hero-sub{
  font-size:18px;
  line-height:1.8;
  color:var(--text-sub);
  max-width:720px;
  margin-bottom:36px;}
.hero-stats{
  display:flex;
  flex-wrap:wrap;
  gap:12px;}
.stat-badge{
  display:inline-flex;
  align-items:baseline;
  gap:8px;
  padding:12px 18px;
  border-radius:999px;
  background:rgba(255,255,255,0.06);
  border:1px solid rgba(255,255,255,0.15);
  backdrop-filter:blur(8px);
  transition:var(--transition);}
.stat-badge:hover{
  border-color:var(--primary);
  box-shadow:0 0 16px rgba(34,211,238,0.15);}
.stat-badge .num{
  font-family:var(--font-num);
  font-size:26px;
  font-weight:800;
  color:var(--primary);
  line-height:1.2;}
.stat-badge .label{
  font-size:13px;
  color:var(--text-sub);
  line-height:1.3;}

/* ===== 面包屑 ===== */
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  flex-wrap:wrap;
  font-size:14px;
  color:var(--text-sub);
  margin-bottom:20px;}
.breadcrumb a{
  color:rgba(148,163,184,0.75);}
.breadcrumb a:hover{
  color:var(--primary);}
.breadcrumb .sep{
  opacity:0.5;}
.breadcrumb .current{
  color:var(--text-main);
  font-weight:500;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
  max-width:360px;}

/* ===== 主内容区 ===== */
.page-main{
  padding:80px 0 64px;}
.main-col{
  display:flex;
  flex-direction:column;
  gap:60px;}
.section-block{
  display:flex;
  flex-direction:column;
  gap:28px;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;}
.section-head .left{
  flex:1;
  min-width:260px;}
.section-head h2{
  font-size:34px;
  font-weight:700;
  line-height:1.3;
  margin-bottom:8px;}
.section-head h2 .gradient-text{
  background:linear-gradient(135deg,#22D3EE,#A78BFA);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;}
.section-head .desc{
  font-size:14px;
  color:var(--text-sub);
  line-height:1.7;
  max-width:520px;}

/* ===== 入口路径卡片 ===== */
.entry-cards{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;}
.entry-card{
  position:relative;
  background:var(--bg-card);
  border-radius:var(--radius-lg);
  padding:32px 28px;
  overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:var(--transition);
  border:1px solid transparent;}
.entry-card::before{
  content:"";
  position:absolute;
  top:0;left:10%;right:10%;
  height:1px;
  background:linear-gradient(90deg,transparent,#22D3EE,transparent);
  opacity:0.7;
  transition:var(--transition);}
.entry-card:hover{
  transform:translateY(-3px);
  background:var(--bg-card-hover);
  border-color:rgba(34,211,238,0.15);
  box-shadow:var(--shadow-hover);}
.entry-card:hover::before{
  opacity:1;
  box-shadow:0 0 12px rgba(34,211,238,0.5);}
.card-icon{
  width:52px;height:52px;
  border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(34,211,238,0.12);
  color:var(--primary);
  font-size:22px;
  margin-bottom:20px;
  transition:var(--transition);}
.entry-card:hover .card-icon{
  background:var(--brand-gradient);
  color:#fff;
  box-shadow:0 0 20px rgba(34,211,238,0.3);}
.entry-card h3{
  font-size:20px;
  font-weight:600;
  margin-bottom:12px;
  line-height:1.4;}
.entry-card p{
  font-size:14px;
  color:var(--text-sub);
  line-height:1.75;}

/* ===== 场景图文 ===== */
.scene-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;}
.scene-card{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  background:var(--bg-card);
  box-shadow:var(--shadow-card);
  min-height:300px;
  transition:var(--transition);}
.scene-card:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow-hover);}
.scene-card .scene-img{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;}
.scene-card .scene-img img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform 0.4s ease;}
.scene-card:hover .scene-img img{
  transform:scale(1.04);}
.scene-card .scene-img::after{
  content:"";
  position:absolute;
  bottom:0;left:0;right:0;
  height:80%;
  background:linear-gradient(180deg,transparent,rgba(11,15,26,0.88));}
.scene-card .scene-body{
  padding:24px 28px 28px;}
.scene-card .scene-tag{
  display:inline-block;
  padding:4px 14px;
  border-radius:999px;
  background:rgba(34,211,238,0.12);
  color:var(--primary);
  font-size:12px;
  font-weight:600;
  margin-bottom:12px;
  letter-spacing:0.5px;}
.scene-card h3{
  font-size:20px;
  font-weight:600;
  margin-bottom:10px;
  line-height:1.4;}
.scene-card p{
  font-size:14px;
  color:var(--text-sub);
  line-height:1.75;}

/* ===== 流程步骤 ===== */
.steps-wrap{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
  position:relative;}
.step-item{
  position:relative;
  background:rgba(18,26,43,0.65);
  border-radius:var(--radius-lg);
  padding:26px 22px;
  text-align:center;
  border:1px solid rgba(148,163,184,0.12);
  transition:var(--transition);}
.step-item:hover{
  border-color:rgba(34,211,238,0.35);
  background:var(--bg-card-hover);
  transform:translateY(-3px);
  box-shadow:var(--shadow-hover);}
.step-num{
  width:44px;height:44px;
  margin:0 auto 16px;
  border-radius:50%;
  background:var(--brand-gradient);
  color:#fff;
  font-size:18px;
  font-weight:800;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 0 16px rgba(34,211,238,0.35);
  font-family:var(--font-num);}
.step-item h3{
  font-size:16px;
  font-weight:600;
  margin-bottom:8px;}
.step-item p{
  font-size:13px;
  color:var(--text-sub);
  line-height:1.65;}
.step-connect{
  position:absolute;
  top:50%;
  right:-14px;
  width:14px;
  height:2px;
  background:linear-gradient(90deg,#22D3EE,#A78BFA);
  z-index:2;}
.step-item:last-child .step-connect{
  display:none;}

/* ===== 侧栏 ===== */
.sidebar{
  display:flex;
  flex-direction:column;
  gap:28px;}
.sidebar-card{
  background:var(--bg-card);
  border-radius:var(--radius-lg);
  border:1px solid rgba(148,163,184,0.12);
  padding:28px 26px;
  box-shadow:var(--shadow-card);}
.sidebar-title{
  font-size:16px;
  font-weight:700;
  color:var(--text-main);
  padding-left:14px;
  position:relative;
  margin-bottom:22px;}
.sidebar-title::before{
  content:"";
  position:absolute;
  left:0;top:50%;
  transform:translateY(-50%);
  width:6px;height:18px;
  border-radius:4px;
  background:var(--brand-gradient);
  box-shadow:0 0 10px rgba(34,211,238,0.4);}
.sidebar-menu li{
  margin-bottom:4px;}
.sidebar-menu a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:10px 12px;
  border-radius:10px;
  font-size:14px;
  color:var(--text-sub);
  transition:var(--transition);}
.sidebar-menu a:hover{
  background:rgba(34,211,238,0.08);
  color:#fff;
  padding-left:18px;}
.sidebar-menu a.active{
  background:rgba(34,211,238,0.1);
  color:var(--text-main);
  font-weight:600;
  border-left:3px solid var(--primary);}
.sidebar-menu a .arrow{
  font-size:12px;
  opacity:0;
  transition:var(--transition);}
.sidebar-menu a:hover .arrow{
  opacity:1;
  transform:translateX(4px);}
.tag-cloud{
  display:flex;
  flex-wrap:wrap;
  gap:10px;}
.tag-cloud a{
  display:inline-block;
  padding:6px 16px;
  border-radius:999px;
  background:rgba(148,163,184,0.08);
  border:1px solid rgba(148,163,184,0.18);
  font-size:13px;
  color:var(--text-sub);
  transition:var(--transition);}
.tag-cloud a:hover{
  border-color:var(--primary);
  color:var(--primary);
  background:rgba(34,211,238,0.06);
  box-shadow:0 0 12px rgba(34,211,238,0.1);}
.tag-cloud a:active{
  transform:scale(0.96);}
.tag-cloud a:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:2px;}

/* ===== FAQ ===== */
.faq-section{
  padding:80px 0;
  background:rgba(18,26,43,0.3);}
.faq-inner{
  max-width:860px;
  margin:0 auto;}
.faq-section .section-head{
  justify-content:center;
  text-align:center;
  margin-bottom:44px;}
.faq-section .section-head .desc{
  margin:0 auto;}
.faq-list{
  border:1px solid rgba(148,163,184,0.15);
  border-radius:16px;
  overflow:hidden;
  background:rgba(11,15,26,0.6);}
.faq-item{
  border-bottom:1px solid rgba(148,163,184,0.1);}
.faq-item:last-child{
  border-bottom:none;}
.faq-question{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:20px 24px;
  min-height:56px;
  background:transparent;
  border:none;
  color:var(--text-main);
  font-size:16px;
  font-weight:600;
  text-align:left;
  cursor:pointer;
  transition:var(--transition);}
.faq-question:hover{
  background:rgba(34,211,238,0.04);}
.faq-question:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:-2px;}
.faq-icon{
  flex-shrink:0;
  width:24px;height:24px;
  position:relative;
  transition:var(--transition);}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  top:50%;left:50%;
  transform:translate(-50%,-50%);
  background:var(--primary);
  transition:var(--transition);}
.faq-icon::before{
  width:14px;height:2px;}
.faq-icon::after{
  width:2px;height:14px;}
.faq-item.open .faq-icon{
  transform:rotate(45deg);}
.faq-item.open .faq-icon::after{
  opacity:0;}
.faq-answer{
  max-height:0;
  overflow:hidden;
  transition:max-height 0.3s cubic-bezier(0.4,0,0.2,1);}
.faq-answer-inner{
  padding:0 24px 20px;
  font-size:14px;
  color:var(--text-sub);
  line-height:1.75;}
.faq-item.open .faq-question{
  background:rgba(34,211,238,0.04);}

/* ===== CTA ===== */
.cta-section{
  position:relative;
  padding:90px 0;
  background:linear-gradient(135deg,rgba(34,211,238,0.1) 0%,rgba(167,139,250,0.1) 100%);
  overflow:hidden;}
.cta-section::before{
  content:"";
  position:absolute;
  top:-40%;left:-20%;
  width:70%;height:180%;
  background:radial-gradient(ellipse at center,rgba(34,211,238,0.12) 0%,transparent 65%);
  pointer-events:none;}
.cta-section::after{
  content:"";
  position:absolute;
  bottom:-40%;right:-20%;
  width:70%;height:180%;
  background:radial-gradient(ellipse at center,rgba(167,139,250,0.12) 0%,transparent 65%);
  pointer-events:none;}
.cta-box{
  position:relative;
  z-index:2;
  max-width:760px;
  margin:0 auto;
  background:var(--bg-card);
  border-radius:var(--radius-lg);
  padding:52px 48px;
  text-align:center;
  box-shadow:var(--shadow-card);
  border-top:1px solid rgba(34,211,238,0.2);}
.cta-box h2{
  font-size:32px;
  font-weight:700;
  margin-bottom:14px;
  line-height:1.35;}
.cta-box h2 .gradient-text{
  background:linear-gradient(135deg,#22D3EE,#A78BFA);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;}
.cta-box p{
  font-size:15px;
  color:var(--text-sub);
  margin-bottom:30px;
  line-height:1.75;}
.cta-actions{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:16px;
  flex-wrap:wrap;}

/* ===== 页脚 ===== */
.site-footer{
  background:#080B12;
  position:relative;}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,#22D3EE,#A78BFA,transparent);}
.footer-main{
  padding:60px 0 40px;}
.footer-col{
  margin-bottom:24px;}
.footer-brand{
  font-size:20px;
  font-weight:800;
  background:linear-gradient(135deg,#22D3EE,#A78BFA);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  margin-bottom:16px;}
.footer-col-title{
  font-size:14px;
  font-weight:700;
  color:var(--text-main);
  padding-left:12px;
  position:relative;
  margin-bottom:16px;}
.footer-col-title::before{
  content:"";
  position:absolute;
  left:0;top:50%;
  transform:translateY(-50%);
  width:6px;height:16px;
  border-radius:4px;
  background:var(--brand-gradient);}
.footer-col ul li{
  line-height:32px;}
.footer-col ul a{
  font-size:14px;
  color:var(--text-sub);
  transition:var(--transition);}
.footer-col ul a:hover{
  color:#fff;
  padding-left:4px;}
.footer-contact li{
  font-size:14px;
  color:var(--text-sub);
  line-height:32px;}
.footer-cert{
  display:flex;
  flex-wrap:wrap;
  gap:10px;}
.footer-cert span{
  display:inline-block;
  padding:5px 14px;
  border-radius:999px;
  border:1px solid rgba(148,163,184,0.22);
  font-size:12px;
  color:rgba(148,163,184,0.85);
  background:rgba(148,163,184,0.06);
  transition:var(--transition);}
.footer-cert span:hover{
  border-color:var(--primary);
  color:var(--primary);}
.footer-bottom{
  border-top:1px solid rgba(148,163,184,0.08);
  padding:20px 0;
  text-align:center;}
.footer-bottom p{
  font-size:13px;
  color:rgba(148,163,184,0.6);}

/* ===== reveal 动画（无 JS 时保持可见） ===== */
.reveal{
  opacity:1;
  transform:none;}

/* ===== 响应式 ===== */
@media (max-width:1023.98px){
  .entry-cards{
    grid-template-columns:1fr 1fr;}
  .steps-wrap{
    grid-template-columns:1fr 1fr;
    gap:24px;}
  .step-connect{
    display:none;}
  .scene-grid{
    grid-template-columns:1fr;}
  .sidebar{
    margin-top:8px;}
  .page-main{
    padding:56px 0;}
  .page-hero{
    padding:120px 0 64px;}
  .page-hero h1{
    font-size:38px;}
  .section-head h2{
    font-size:30px;}
  .cta-box{
    padding:40px 28px;}
}
@media (max-width:639.98px){
  .nav-toggle{
    display:flex;}
  .nav-menu{
    position:fixed;
    top:72px;left:0;right:0;
    background:rgba(11,15,26,0.98);
    backdrop-filter:blur(16px);
    flex-direction:column;
    align-items:flex-start;
    gap:0;
    padding:16px 24px 24px;
    transform:translateY(-120%);
    opacity:0;
    visibility:hidden;
    transition:var(--transition);
    border-bottom:1px solid rgba(34,211,238,0.2);
    box-shadow:0 16px 40px rgba(0,0,0,0.5);}
  .nav-menu.open{
    transform:translateY(0);
    opacity:1;
    visibility:visible;}
  .nav-link{
    width:100%;
    font-size:17px;
    padding:14px 4px;
    border-bottom:1px solid rgba(148,163,184,0.08);}
  .nav-link::after{
    display:none;}
  .nav-link.active{
    color:var(--primary);
    font-weight:600;}
  .header-actions .btn{
    padding:8px 16px;
    min-height:38px;
    font-size:13px;}
  .brand-text{
    font-size:17px;}
  .brand-icon{
    width:34px;height:34px;
    font-size:17px;}
  .page-hero{
    padding:104px 0 48px;}
  .page-hero h1{
    font-size:32px;}
  .page-hero .hero-sub{
    font-size:16px;}
  .hero-stats{
    gap:8px;}
  .stat-badge{
    padding:10px 14px;}
  .stat-badge .num{
    font-size:22px;}
  .stat-badge .label{
    font-size:12px;}
  .breadcrumb .current{
    max-width:220px;}
  .entry-cards{
    grid-template-columns:1fr;}
  .steps-wrap{
    grid-template-columns:1fr;}
  .section-head{
    flex-direction:column;
    align-items:flex-start;}
  .section-head h2{
    font-size:26px;}
  .section-block{
    gap:20px;}
  .main-col{
    gap:44px;}
  .faq-section{
    padding:56px 0;}
  .faq-question{
    padding:16px 18px;
    font-size:15px;}
  .faq-answer-inner{
    padding:0 18px 18px;
    font-size:13px;}
  .cta-section{
    padding:56px 0;}
  .cta-box{
    padding:32px 20px;}
  .cta-box h2{
    font-size:26px;}
  .footer-main{
    padding:44px 0 24px;}
}

/* roulang page: article */
:root {
  --bg-root: #0B0F1A;
  --bg-card: #121A2B;
  --bg-card-hover: #162032;
  --bg-input: #0F1626;
  --primary: #22D3EE;
  --secondary: #A78BFA;
  --gradient-brand: linear-gradient(135deg, #22D3EE 0%, #A78BFA 100%);
  --text-main: #F1F5F9;
  --text-sub: #94A3B8;
  --border-color: rgba(148, 163, 184, 0.18);
  --warning: #F43F5E;
  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 14px 44px rgba(0, 0, 0, 0.5);
  --glow-primary: 0 0 24px rgba(34, 211, 238, 0.18);
  --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", sans-serif;
  --font-num: Inter, "DIN Alternate", ui-sans-serif, tabular-nums;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-cn);
  background: var(--bg-root);
  color: var(--text-main);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
  color: inherit;
}

ul, ol {
  list-style: none;
}

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

@media (max-width: 640px) {
  .grid-container {
    padding-left: 16px;
    padding-right: 16px;
  }
}

/* ===== 导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  z-index: 1000;
  background: rgba(11, 15, 26, 0.8);
  border-bottom: 1px solid transparent;
  transition: background 0.3s ease, box-shadow 0.3s ease, backdrop-filter 0.3s ease;
}

.site-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, #22D3EE, #A78BFA, transparent);
  opacity: 0.8;
}

.site-header.scrolled {
  background: rgba(11, 15, 26, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 6px 30px rgba(0, 0, 0, 0.35);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  flex-wrap: nowrap;
}

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

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 18px;
  color: #0B0F1A;
  font-family: var(--font-num);
  box-shadow: 0 0 18px rgba(34, 211, 238, 0.25);
}

.brand-text {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.5px;
  background: linear-gradient(135deg, #22D3EE 0%, #A78BFA 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: auto;
  margin-right: 28px;
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-sub);
  position: relative;
  padding: 6px 2px;
  transition: color 0.25s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #22D3EE, #A78BFA);
  border-radius: 2px;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 0 12px rgba(34, 211, 238, 0.5);
}

.nav-link:hover {
  color: #ffffff;
}

.nav-link:hover::after {
  width: 100%;
}

.nav-link.active {
  color: #ffffff;
}

.nav-link.active::after {
  width: 100%;
  box-shadow: 0 0 14px rgba(34, 211, 238, 0.6);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid transparent;
  font-size: 14px;
  padding: 10px 20px;
}

.btn-primary {
  background: var(--gradient-brand);
  color: #0B0F1A;
  min-width: 86px;
  height: 40px;
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(34, 211, 238, 0.15);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(34, 211, 238, 0.35);
  color: #0B0F1A;
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 12px rgba(34, 211, 238, 0.2);
}

.btn-primary:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.btn-outline {
  background: transparent;
  border-color: rgba(34, 211, 238, 0.5);
  color: var(--primary);
  border-radius: 999px;
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.3s ease;
}

.btn-outline:hover {
  background: rgba(34, 211, 238, 0.1);
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--glow-primary);
}

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

.btn-outline:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.nav-toggle:hover {
  background: rgba(34, 211, 238, 0.15);
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

@media (max-width: 640px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(11, 15, 26, 0.97);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 0 24px;
    margin: 0;
    border-bottom: 1px solid var(--border-color);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .nav-menu.open {
    max-height: 400px;
    padding: 12px 24px 20px;
  }

  .nav-menu .nav-link {
    display: block;
    font-size: 16px;
    line-height: 48px;
    width: 100%;
    border-bottom: 1px solid rgba(148, 163, 184, 0.1);
  }

  .nav-menu .nav-link::after {
    display: none;
  }

  .nav-menu .nav-link.active {
    color: var(--primary);
    padding-left: 8px;
    border-left: 2px solid var(--primary);
  }
}

/* ===== 主区域 ===== */
.main-content {
  padding-top: 72px;
}

/* ===== 面包屑 ===== */
.breadcrumb-wrap {
  padding: 28px 0 0;
  background: var(--bg-root);
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--text-sub);
}

.breadcrumb a {
  color: var(--text-sub);
  transition: color 0.25s ease;
}

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

.breadcrumb-sep {
  color: rgba(148, 163, 184, 0.4);
}

.breadcrumb .current {
  color: var(--text-main);
  max-width: 300px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

@media (max-width: 640px) {
  .breadcrumb .current {
    max-width: 180px;
  }
}

/* ===== 文章头部 ===== */
.article-hero {
  padding: 32px 0 20px;
  position: relative;
}

.article-hero .grid-container {
  max-width: 860px;
}

.article-title {
  font-size: 42px;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.5px;
  color: var(--text-main);
  margin: 8px 0 18px;
  word-break: break-word;
}

@media (max-width: 768px) {
  .article-title {
    font-size: 30px;
  }
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
  font-size: 13px;
  color: var(--text-sub);
}

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

.article-meta .meta-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--primary);
  display: inline-block;
}

/* ===== 正文区域 ===== */
.article-section {
  padding: 16px 0 48px;
}

.article-container {
  max-width: 860px;
}

.article-content {
  font-size: 17px;
  line-height: 1.85;
  color: rgba(241, 245, 249, 0.92);
}

.article-content > * + * {
  margin-top: 1.2em;
}

.article-content p {
  margin-bottom: 24px;
}

.article-content h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 48px;
  margin-bottom: 20px;
  line-height: 1.4;
  position: relative;
  padding-left: 4px;
}

.article-content h2::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 24px;
  background: var(--gradient-brand);
  border-radius: 4px;
  margin-right: 12px;
  vertical-align: -3px;
}

.article-content h3 {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-main);
  margin-top: 32px;
  margin-bottom: 16px;
  line-height: 1.5;
}

.article-content h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-main);
  margin-top: 24px;
  margin-bottom: 12px;
}

.article-content img {
  border-radius: 12px;
  box-shadow: 0 10px 36px rgba(0, 0, 0, 0.4);
  margin: 28px 0;
}

.article-content blockquote {
  border-left: 3px solid var(--primary);
  background: rgba(148, 163, 184, 0.06);
  padding: 18px 24px;
  border-radius: 0 12px 12px 0;
  font-size: 16px;
  color: var(--text-sub);
  margin: 28px 0;
  font-style: normal;
}

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

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 15px;
  line-height: 1.7;
  border-radius: 12px;
  overflow: hidden;
  display: block;
  overflow-x: auto;
}

.article-content table thead {
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.12), rgba(167, 139, 250, 0.12));
}

.article-content table th,
.article-content table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
  text-align: left;
  white-space: nowrap;
}

.article-content table th {
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
}

.article-content table tr:nth-child(even) td {
  background: rgba(148, 163, 184, 0.04);
}

.article-content table tr:hover td {
  background: rgba(34, 211, 238, 0.04);
}

.article-content code {
  font-family: 'Fira Code', 'Consolas', monospace;
  font-size: 14px;
  background: rgba(34, 211, 238, 0.1);
  color: var(--primary);
  padding: 2px 6px;
  border-radius: 4px;
}

.article-content pre {
  background: #0F1626;
  border: 1px solid rgba(148, 163, 184, 0.15);
  border-radius: 12px;
  padding: 20px 24px;
  overflow-x: auto;
  margin: 28px 0;
  line-height: 1.7;
}

.article-content pre code {
  background: transparent;
  color: var(--text-main);
  padding: 0;
  font-size: 14px;
}

.article-content ul,
.article-content ol {
  margin: 24px 0;
  padding-left: 24px;
}

.article-content ul li {
  position: relative;
  padding-left: 8px;
  margin-bottom: 10px;
  color: rgba(241, 245, 249, 0.88);
}

.article-content ul li::before {
  content: '';
  position: absolute;
  left: -16px;
  top: 12px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 8px rgba(34, 211, 238, 0.4);
}

.article-content ol li {
  list-style-type: decimal;
  color: var(--primary);
  padding-left: 6px;
  margin-bottom: 10px;
}

.article-content ol li::marker {
  color: var(--primary);
  font-weight: 600;
}

.article-content a {
  color: var(--primary);
  border-bottom: 1px solid rgba(34, 211, 238, 0.3);
  padding-bottom: 1px;
  transition: border-color 0.25s ease;
}

.article-content a:hover {
  border-color: var(--primary);
}

.article-content hr {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(148, 163, 184, 0.4), transparent);
  margin: 36px 0;
}

/* 文章未找到 */
.article-notfound {
  text-align: center;
  padding: 60px 24px;
  background: var(--bg-card);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-lg);
  margin: 40px 0;
}

.article-notfound .notfound-icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.article-notfound h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-main);
}

.article-notfound p {
  color: var(--text-sub);
  margin-bottom: 20px;
}

/* ===== 上一篇/下一篇 ===== */
.article-pager {
  padding: 24px 0 48px;
}

.article-pager .grid-container {
  max-width: 860px;
}

.pager-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.pager-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(34, 211, 238, 0.4);
  border-radius: 999px;
  padding: 10px 24px;
  font-size: 14px;
  color: var(--primary);
  background: transparent;
  transition: all 0.3s ease;
}

.pager-btn:hover {
  background: rgba(34, 211, 238, 0.08);
  box-shadow: var(--glow-primary);
  color: var(--primary);
}

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

.pager-btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.pager-btn.pager-next {
  margin-left: auto;
}

.pager-arrow {
  font-size: 16px;
  line-height: 1;
}

@media (max-width: 520px) {
  .pager-inner {
    flex-direction: column;
  }

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

/* ===== 相关推荐 ===== */
.related-section {
  padding: 48px 0 64px;
  background: rgba(18, 26, 43, 0.4);
  border-top: 1px solid var(--border-color);
}

.related-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 24px;
  text-align: center;
}

.related-title span {
  background: linear-gradient(135deg, #22D3EE, #A78BFA);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 768px) {
  .related-grid {
    grid-template-columns: 1fr;
  }
}

.related-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 16px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.related-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(34, 211, 238, 0.4), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.related-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(34, 211, 238, 0.3);
}

.related-card:hover::before {
  opacity: 1;
}

.related-card:active {
  transform: translateY(0);
}

.related-card:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.related-thumb {
  width: 80px;
  height: 80px;
  border-radius: 12px;
  object-fit: cover;
  flex-shrink: 0;
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.15), rgba(167, 139, 250, 0.15));
}

.related-info {
  min-width: 0;
}

.related-cat {
  display: inline-block;
  font-size: 12px;
  color: var(--primary);
  background: rgba(34, 211, 238, 0.1);
  border-radius: 999px;
  padding: 2px 10px;
  margin-bottom: 6px;
}

.related-card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0;
}

/* ===== CTA ===== */
.cta-section {
  padding: 64px 0 80px;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.08) 0%, rgba(167, 139, 250, 0.1) 100%);
  z-index: -1;
}

.cta-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 48px 40px;
  text-align: center;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.cta-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 10%;
  right: 10%;
  height: 2px;
  background: var(--gradient-brand);
  border-radius: 2px;
}

.cta-card h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #22D3EE, #A78BFA);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cta-card p {
  color: var(--text-sub);
  font-size: 15px;
  margin-bottom: 28px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.cta-card .btn {
  min-width: 160px;
  height: 48px;
  font-size: 16px;
}

@media (max-width: 640px) {
  .cta-card {
    padding: 36px 24px;
  }

  .cta-card h2 {
    font-size: 26px;
  }
}

/* ===== 返回首页 ===== */
.back-home-section {
  padding: 0 0 48px;
}

.back-home-wrap {
  text-align: center;
}

/* ===== 页脚 ===== */
.site-footer {
  background: #080B12;
  border-top: 1px solid transparent;
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, #22D3EE, #A78BFA, transparent);
}

.footer-main {
  padding: 48px 0 32px;
}

.footer-col {
  margin-bottom: 24px;
}

.footer-brand {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #22D3EE, #A78BFA);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-col-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 12px;
  padding-left: 10px;
  position: relative;
}

.footer-col-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 14px;
  border-radius: 2px;
  background: var(--gradient-brand);
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  line-height: 32px;
  font-size: 14px;
  color: var(--text-sub);
}

.footer-col ul li a {
  color: var(--text-sub);
  transition: color 0.25s ease;
}

.footer-col ul li a:hover {
  color: #ffffff;
}

.footer-contact li {
  margin-bottom: 4px;
}

.footer-cert {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-cert span {
  display: inline-block;
  font-size: 13px;
  color: var(--text-sub);
  border: 1px solid var(--border-color);
  border-radius: 999px;
  padding: 4px 14px;
  background: rgba(255, 255, 255, 0.02);
  transition: border-color 0.25s ease, color 0.25s ease;
}

.footer-cert span:hover {
  border-color: rgba(34, 211, 238, 0.4);
  color: var(--text-main);
}

.footer-bottom {
  border-top: 1px solid rgba(148, 163, 184, 0.1);
  padding: 20px 0;
}

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

@media (max-width: 768px) {
  .footer-main {
    padding-top: 32px;
  }
}

/* ===== 焦点可见 ===== */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--primary) !important;
  outline-offset: 2px !important;
}