/* roulang page: index */
:root {
  --bg-base: #0A0F1E;
  --bg-elevated: #101A2E;
  --line-glass: rgba(255, 255, 255, 0.08);
  --bg-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.02));
  --accent: #26C6DA;
  --accent-strong: #22B8CC;
  --accent-2: #7E8AF4;
  --warning: #FFB020;
  --text-primary: #F5F7FF;
  --text-secondary: #9AA6C3;
  --text-muted: #5A6A8A;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  background: #0A0F1E;
  background-image:
    radial-gradient(ellipse at 6% 4%, rgba(38, 198, 218, 0.07), transparent 40%),
    radial-gradient(ellipse at 94% 6%, rgba(126, 138, 244, 0.06), transparent 36%);
  background-attachment: fixed;
  color: #F5F7FF;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 64px;
}

@media (min-width: 1024px) {
  body {
    padding-bottom: 0;
  }
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

@media (min-width: 1024px) {
  .container {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}

.main-content {
  margin-left: 0;
  padding-top: 56px;
  min-height: 100vh;
}

@media (min-width: 1024px) {
  .main-content {
    margin-left: 78px;
    padding-top: 0;
  }
}

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

@media (min-width: 1024px) {
  .section-pad {
    padding: 96px 0;
  }
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}

.section-eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #26C6DA;
  background: rgba(38, 198, 218, 0.08);
  border: 1px solid rgba(38, 198, 218, 0.18);
  border-radius: 999px;
  padding: 5px 16px;
  margin-bottom: 16px;
}

.section-title {
  font-size: 28px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: #F5F7FF;
  margin: 0 0 12px;
}

@media (min-width: 1024px) {
  .section-title {
    font-size: 32px;
  }
}

.section-desc {
  font-size: 15px;
  color: #9AA6C3;
  line-height: 1.8;
  margin: 0;
}

.glass-card {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.02));
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: inset 1px 1px 0 rgba(255, 255, 255, 0.06), 0 8px 30px rgba(0, 0, 0, 0.28);
  border-radius: 16px;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.glass-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.14);
  box-shadow: inset 1px 1px 0 rgba(255, 255, 255, 0.08), 0 12px 36px rgba(0, 0, 0, 0.36), 0 0 24px rgba(38, 198, 218, 0.18);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: #26C6DA;
  color: #06121A;
  font-weight: 600;
  font-size: 15px;
  border-radius: 12px;
  padding: 14px 30px;
  box-shadow: 0 0 24px rgba(38, 198, 218, 0.35);
  transition: all 0.25s ease;
  border: none;
  cursor: pointer;
  text-decoration: none;
  line-height: 1.2;
}

.btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: 0 0 34px rgba(38, 198, 218, 0.55);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0.5px);
}

.btn-primary:focus-visible {
  outline: 2px solid rgba(103, 232, 249, 0.7);
  outline-offset: 2px;
}

.btn-sm {
  padding: 10px 20px;
  font-size: 14px;
  border-radius: 10px;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #F5F7FF;
  font-weight: 500;
  font-size: 15px;
  border-radius: 12px;
  padding: 14px 30px;
  transition: all 0.25s ease;
  cursor: pointer;
  text-decoration: none;
  line-height: 1.2;
}

.btn-ghost:hover {
  border-color: rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-2px);
}

.btn-ghost:active {
  transform: translateY(0);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.04);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 12px;
  color: #C7D0E8;
  line-height: 1.2;
}

.badge::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #26C6DA;
  flex-shrink: 0;
}

.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== 左侧竖向导航 ===== */
.side-nav {
  display: none;
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: 78px;
  background: #070B16;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
  flex-direction: column;
  align-items: center;
  z-index: 60;
}

@media (min-width: 1024px) {
  .side-nav {
    display: flex;
  }
}

.side-nav-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 0 24px;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  width: 100%;
}

.brand-logo-circle {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(38, 198, 218, 0.2), rgba(38, 198, 218, 0.05));
  border: 1px solid rgba(38, 198, 218, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  color: #26C6DA;
  letter-spacing: -0.02em;
}

.brand-logo-sub {
  font-size: 11px;
  color: #9AA6C3;
  margin-top: 6px;
  letter-spacing: 0.08em;
}

.side-nav-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 20px 0;
  flex: 1;
  width: 100%;
  align-items: center;
}

.nav-item {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 48px;
  border-radius: 12px;
  color: #5A6A8A;
  transition: color 0.2s ease, background 0.2s ease;
  text-decoration: none;
}

.nav-item:hover {
  color: #C7D0E8;
  background: rgba(255, 255, 255, 0.04);
}

.nav-item.active {
  color: #26C6DA;
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: -8px;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 22px;
  background: #26C6DA;
  border-radius: 0 4px 4px 0;
}

.nav-tooltip {
  position: absolute;
  left: 52px;
  top: 50%;
  transform: translateY(-50%) translateX(-6px);
  background: #101A2E;
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #F5F7FF;
  font-size: 12px;
  padding: 5px 12px;
  border-radius: 8px;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
  z-index: 70;
  pointer-events: none;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.nav-item:hover .nav-tooltip {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) translateX(0);
}

.nav-item svg {
  width: 20px;
  height: 20px;
  stroke-width: 1.8;
}

.side-nav-bottom {
  padding-bottom: 20px;
  width: 100%;
  display: flex;
  justify-content: center;
}

/* ===== 移动端顶部导航 ===== */
.mobile-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  z-index: 55;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  background: rgba(7, 11, 22, 0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

@media (min-width: 1024px) {
  .mobile-header {
    display: none;
  }
}

.mobile-menu-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: #F5F7FF;
  cursor: pointer;
  border-radius: 10px;
  transition: background 0.2s;
}

.mobile-menu-btn:hover {
  background: rgba(255, 255, 255, 0.05);
}

.mobile-brand {
  font-size: 16px;
  font-weight: 600;
  color: #F5F7FF;
  text-decoration: none;
  letter-spacing: 0.01em;
}

.mobile-brand span {
  color: #26C6DA;
}

/* ===== 移动端抽屉 ===== */
.drawer {
  position: fixed;
  inset: 0;
  z-index: 70;
  pointer-events: none;
}

.drawer.open {
  pointer-events: auto;
}

.drawer-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.drawer.open .drawer-overlay {
  opacity: 1;
}

.drawer-panel {
  position: absolute;
  left: 0;
  top: 0;
  width: 280px;
  height: 100%;
  background: rgba(10, 15, 30, 0.97);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-right: 1px solid rgba(255, 255, 255, 0.1);
  transform: translateX(-100%);
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
  display: flex;
  flex-direction: column;
  padding: 24px 20px;
}

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

.drawer-brand {
  font-size: 18px;
  font-weight: 600;
  color: #F5F7FF;
  padding: 4px 8px 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 20px;
}

.drawer-brand span {
  color: #26C6DA;
}

.drawer-links {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
}

.drawer-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 10px;
  border-radius: 10px;
  color: #9AA6C3;
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease;
}

.drawer-link:hover {
  color: #F5F7FF;
  background: rgba(255, 255, 255, 0.04);
}

.drawer-link.active {
  color: #26C6DA;
  background: rgba(38, 198, 218, 0.08);
}

.drawer-link svg {
  width: 20px;
  height: 20px;
  stroke-width: 1.8;
}

.drawer-cta {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  overflow: hidden;
}

.hero-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(38, 198, 218, 0.35), transparent);
}

.hero-visual {
  position: relative;
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid rgba(38, 198, 218, 0.22);
  box-shadow: 0 0 40px rgba(38, 198, 218, 0.1), 0 24px 60px rgba(0, 0, 0, 0.35);
  padding: 12px;
}

.hero-visual img {
  border-radius: 16px;
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.hero-float-card {
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(16, 26, 46, 0.92), rgba(16, 26, 46, 0.75));
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
}

.dot-pulse {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #26C6DA;
  box-shadow: 0 0 0 rgba(38, 198, 218, 0.6);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(38, 198, 218, 0.5);
  }
  70% {
    box-shadow: 0 0 0 12px rgba(38, 198, 218, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(38, 198, 218, 0);
  }
}

/* ===== 图标容器 ===== */
.icon-box {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.icon-box svg {
  width: 24px;
  height: 24px;
  stroke-width: 1.6;
}

.badge-core {
  position: absolute;
  top: 14px;
  right: 14px;
  background: rgba(38, 198, 218, 0.14);
  border: 1px solid rgba(38, 198, 218, 0.28);
  color: #26C6DA;
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 999px;
  letter-spacing: 0.06em;
}

/* ===== 场景演示 ===== */
.play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(38, 198, 218, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 0 32px rgba(38, 198, 218, 0.5);
  transition: all 0.3s ease;
  z-index: 5;
}

.play-btn:hover {
  transform: translate(-50%, -50%) scale(1.08);
  background: #26C6DA;
  box-shadow: 0 0 44px rgba(38, 198, 218, 0.7);
}

.play-btn svg {
  width: 22px;
  height: 22px;
  margin-left: 2px;
  fill: #06121A;
}

/* ===== 统计卡 ===== */
.stat-card {
  text-align: center;
  padding: 28px 16px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: all 0.3s ease;
}

.stat-card:hover {
  border-color: rgba(38, 198, 218, 0.25);
  box-shadow: 0 0 24px rgba(38, 198, 218, 0.12);
  transform: translateY(-3px);
}

.stat-number {
  font-size: 40px;
  font-weight: 700;
  color: #F5F7FF;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.stat-number span {
  color: #26C6DA;
}

.stat-label {
  font-size: 14px;
  color: #9AA6C3;
  margin-top: 8px;
}

.quote-card {
  padding: 28px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  position: relative;
}

.quote-card::before {
  content: '“';
  font-size: 48px;
  font-family: Georgia, serif;
  color: rgba(38, 198, 218, 0.35);
  position: absolute;
  top: 12px;
  left: 20px;
  line-height: 1;
}

.quote-card p {
  font-size: 15px;
  color: #D5DCF0;
  line-height: 1.8;
  margin: 0 0 16px;
  padding-top: 20px;
}

.quote-source {
  font-size: 13px;
  color: #5A6A8A;
  display: flex;
  align-items: center;
  gap: 8px;
}

.quote-source::before {
  content: '';
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: #26C6DA;
}

/* ===== FAQ ===== */
.faq-item {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: background 0.2s ease;
}

.faq-item:first-child {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 24px 8px;
  text-align: left;
  font-size: 16px;
  font-weight: 500;
  color: #F5F7FF;
  transition: color 0.2s;
  font-family: inherit;
  line-height: 1.5;
}

.faq-question:hover {
  color: #26C6DA;
}

.faq-question::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #26C6DA;
  flex-shrink: 0;
  box-shadow: 0 0 8px rgba(38, 198, 218, 0.5);
}

.faq-icon {
  margin-left: auto;
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 400;
  color: #9AA6C3;
  transition: transform 0.3s ease, color 0.2s ease, border-color 0.2s ease;
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  color: #26C6DA;
  border-color: rgba(38, 198, 218, 0.3);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.22, 1, 0.36, 1), padding 0.3s ease, opacity 0.3s ease;
  opacity: 0;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  opacity: 1;
  padding: 0 8px 24px 26px;
}

.faq-answer p {
  font-size: 14px;
  line-height: 1.8;
  color: #9AA6C3;
  margin: 0;
  background: rgba(255, 255, 255, 0.02);
  padding: 16px;
  border-radius: 12px;
}

/* ===== 空态 ===== */
.empty-state {
  text-align: center;
  padding: 64px 24px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.02);
}

.empty-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(38, 198, 218, 0.1);
  border: 1px solid rgba(38, 198, 218, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.empty-icon svg {
  width: 32px;
  height: 32px;
  color: #26C6DA;
  stroke-width: 1.5;
}

.empty-state h3 {
  font-size: 20px;
  font-weight: 600;
  color: #F5F7FF;
  margin: 0 0 8px;
}

.empty-state p {
  font-size: 14px;
  color: #9AA6C3;
  margin: 0 0 24px;
}

.empty-state .btn-ghost {
  display: inline-flex;
}

/* ===== 底部固定转化条 ===== */
.convert-bar {
  position: fixed;
  bottom: 16px;
  right: 16px;
  left: 16px;
  z-index: 40;
  max-width: 1200px;
  margin: 0 auto;
}

@media (min-width: 1024px) {
  .convert-bar {
    left: 94px;
    right: 16px;
    max-width: 1200px;
  }
}

.convert-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: rgba(16, 26, 46, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(38, 198, 218, 0.18);
  border-radius: 16px;
  padding: 12px 16px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.45), 0 0 30px rgba(38, 198, 218, 0.08);
}

.convert-inner p {
  font-size: 14px;
  font-weight: 500;
  color: #F5F7FF;
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

@media (min-width: 768px) {
  .convert-inner p {
    font-size: 15px;
  }
}

.convert-inner .btn-primary {
  flex-shrink: 0;
  padding: 10px 20px;
  font-size: 14px;
}

.convert-close {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #9AA6C3;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s;
}

.convert-close:hover {
  color: #F5F7FF;
  background: rgba(255, 255, 255, 0.08);
}

/* ===== 页脚 ===== */
.site-footer {
  background: #060A14;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 64px 0 32px;
}

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

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.footer-brand-name {
  font-size: 18px;
  font-weight: 600;
  color: #F5F7FF;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-brand-name span {
  color: #26C6DA;
}

.footer-brand-desc {
  font-size: 14px;
  color: #9AA6C3;
  line-height: 1.8;
  margin: 0;
  max-width: 240px;
}

.footer-heading {
  font-size: 14px;
  font-weight: 600;
  color: #F5F7FF;
  margin: 0 0 16px;
  letter-spacing: 0.04em;
}

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

.footer-links a {
  font-size: 14px;
  color: #9AA6C3;
  text-decoration: none;
  transition: color 0.2s, padding-left 0.2s;
  display: inline-block;
}

.footer-links a:hover {
  color: #26C6DA;
  padding-left: 4px;
}

.footer-bottom {
  text-align: center;
  padding-top: 32px;
  margin-top: 48px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 13px;
  color: #5A6A8A;
}

/* ===== 图片 hover 缩放 ===== */
.group:hover .group-hover\:scale-105 {
  transform: scale(1.05);
}

.group-hover\:scale-105 {
  transition: transform 0.5s ease;
}

/* ===== 链接箭头 ===== */
.link-arrow {
  transition: gap 0.2s ease;
  gap: 4px;
}

.link-arrow:hover {
  gap: 8px;
}

/* roulang page: category1 */
:root {
  --bg-base: #0A0F1E;
  --bg-elevated: #101A2E;
  --line-glass: rgba(255,255,255,0.08);
  --bg-glass: linear-gradient(135deg, rgba(255,255,255,0.07), rgba(255,255,255,0.02));
  --accent: #26C6DA;
  --accent-strong: #22B8CC;
  --accent-2: #7E8AF4;
  --warning: #FFB020;
  --text-primary: #F5F7FF;
  --text-secondary: #9AA6C3;
  --text-muted: #5A6A8A;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  position: relative;
  padding-bottom: 0;
}
body::before {
  content: '';
  position: fixed;
  top: -200px; left: -200px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(38,198,218,0.08) 0%, transparent 70%);
  pointer-events: none; z-index: 0;
}
body::after {
  content: '';
  position: fixed;
  top: -100px; right: -100px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(126,138,244,0.06) 0%, transparent 70%);
  pointer-events: none; z-index: 0;
}
.container-main { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }

/* ===== 左侧竖向导航 ===== */
.side-nav {
  position: fixed;
  left: 0; top: 0; bottom: 0;
  width: 78px;
  background: #070B16;
  border-right: 1px solid rgba(255,255,255,0.08);
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 0 16px;
}
.side-nav-a { text-decoration: none; }
.side-nav-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 10px 0 16px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 16px;
  color: var(--accent);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -0.5px;
  line-height: 1.2;
}
.side-nav-brand small {
  font-size: 10px;
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: 1px;
  margin-top: 2px;
}
.side-nav-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
  width: 100%;
  padding: 0 12px;
}
.nav-item {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 48px;
  border-radius: 12px;
  color: var(--text-muted);
  transition: all .25s ease;
}
.nav-item svg { width: 20px; height: 20px; }
.nav-item:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.05);
}
.nav-item.active {
  color: var(--accent);
  background: rgba(38,198,218,0.08);
}
.nav-item.active::before {
  content: '';
  position: absolute;
  left: -12px; top: 50%;
  transform: translateY(-50%);
  width: 3px; height: 22px;
  background: var(--accent);
  border-radius: 0 3px 3px 0;
  box-shadow: 0 0 8px rgba(38,198,218,0.6);
}
.nav-tooltip {
  position: absolute;
  left: 60px;
  background: #0d1526;
  border: 1px solid var(--line-glass);
  color: var(--text-primary);
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 6px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s;
  white-space: nowrap;
  z-index: 60;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}
.nav-item:hover .nav-tooltip { opacity: 1; }
.side-nav-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,0.06);
  width: 100%;
}
.side-nav-footer a {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 10px;
  color: var(--text-muted);
  transition: all .25s;
  font-size: 15px;
}
.side-nav-footer a:hover {
  color: var(--accent);
  background: rgba(38,198,218,0.08);
}

/* ===== 移动端顶部导航 ===== */
.mobile-topbar {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 56px;
  background: rgba(7,11,22,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  z-index: 200;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
}
.mobile-topbar .menu-btn,
.mobile-topbar .top-cta {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.03);
  color: var(--text-primary);
  cursor: pointer;
  font-size: 18px;
  transition: all .2s;
}
.mobile-topbar .menu-btn:hover,
.mobile-topbar .top-cta:hover {
  border-color: rgba(38,198,218,0.4);
  color: var(--accent);
}
.mobile-brand-text {
  font-weight: 700;
  font-size: 16px;
  color: var(--text-primary);
}
.mobile-brand-text span { color: var(--accent); }

/* ===== 移动端抽屉 ===== */
.mobile-drawer {
  position: fixed;
  top: 0; bottom: 0; left: 0;
  width: 280px;
  background: rgba(10,15,30,0.97);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-right: 1px solid rgba(255,255,255,0.08);
  z-index: 300;
  transform: translateX(-100%);
  transition: transform .35s cubic-bezier(.22,.61,.36,1);
  display: flex;
  flex-direction: column;
  padding: 20px 0;
}
.mobile-drawer.open { transform: translateX(0); }
.drawer-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 20px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.drawer-brand {
  font-weight: 700;
  font-size: 18px;
  color: var(--text-primary);
}
.drawer-brand span { color: var(--accent); }
.drawer-close {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 16px;
  transition: all .2s;
}
.drawer-close:hover {
  color: var(--accent);
  border-color: rgba(38,198,218,0.4);
}
.drawer-links {
  display: flex; flex-direction: column;
  padding: 16px 12px;
  gap: 4px;
  flex: 1;
}
.drawer-links a {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 16px;
  border-radius: 12px;
  font-size: 15px;
  color: var(--text-secondary);
  transition: all .2s;
}
.drawer-links a i { width: 20px; text-align: center; font-size: 16px; }
.drawer-links a:hover { background: rgba(255,255,255,0.04); color: var(--text-primary); }
.drawer-links a.active {
  background: rgba(38,198,218,0.1);
  color: var(--accent);
  border-left: 3px solid var(--accent);
}
.drawer-cta {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.06);
  display: flex; flex-direction: column; gap: 10px;
}
.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(2px);
  z-index: 290;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s;
}
.drawer-overlay.show { opacity: 1; pointer-events: auto; }

/* ===== 主内容区 ===== */
.main-content {
  margin-left: 78px;
  position: relative;
  z-index: 1;
}

/* ===== 玻璃卡片 ===== */
.glass-card {
  background: linear-gradient(135deg, rgba(255,255,255,0.07), rgba(255,255,255,0.02));
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--line-glass);
  border-radius: 16px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.28);
  transition: all .3s ease;
  box-shadow: inset 1px 1px 0 rgba(255,255,255,0.12), 0 8px 30px rgba(0,0,0,0.28);
}
.glass-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255,255,255,0.14);
  box-shadow: inset 1px 1px 0 rgba(255,255,255,0.14), 0 0 24px rgba(38,198,218,0.25), 0 8px 30px rgba(0,0,0,0.28);
}

/* ===== 按钮 ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #06121A;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: 10px;
  text-decoration: none;
  transition: all .25s ease;
  box-shadow: 0 0 24px rgba(38,198,218,0.35);
  border: none;
  cursor: pointer;
  font-size: 15px;
  line-height: 1.4;
}
.btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: 0 0 34px rgba(38,198,218,0.55);
  transform: translateY(-2px);
}
.btn-primary:active { transform: translateY(0.5px); }
.btn-primary:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px rgba(38,198,218,0.7), 0 0 24px rgba(38,198,218,0.35);
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.15);
  color: var(--text-primary);
  padding: 12px 28px;
  border-radius: 10px;
  text-decoration: none;
  transition: all .25s ease;
  font-size: 15px;
  cursor: pointer;
}
.btn-ghost:hover {
  border-color: rgba(255,255,255,0.25);
  transform: translateY(-2px);
  background: rgba(255,255,255,0.08);
}
.btn-ghost:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px rgba(38,198,218,0.5);
}

/* ===== 徽章 ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(38,198,218,0.1);
  border: 1px solid rgba(38,198,218,0.2);
  color: var(--accent);
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  font-weight: 500;
  letter-spacing: 0.5px;
}
.badge-dot {
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 6px rgba(38,198,218,0.8);
}
.trust-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 999px;
  padding: 6px 16px;
  font-size: 12px;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.03);
  backdrop-filter: blur(8px);
  white-space: nowrap;
}
.trust-badge i {
  color: var(--accent);
  font-size: 12px;
}

/* ===== 标签 ===== */
.tag-pill {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 14px;
  border: 1px solid rgba(255,255,255,0.12);
  color: var(--text-secondary);
  background: rgba(255,255,255,0.03);
  cursor: pointer;
  transition: all .25s ease;
  user-select: none;
}
.tag-pill:hover {
  border-color: rgba(38,198,218,0.5);
  color: var(--text-primary);
  background: rgba(38,198,218,0.05);
}
.tag-pill.active {
  background: rgba(38,198,218,0.12);
  border-color: rgba(38,198,218,0.4);
  color: var(--accent);
  font-weight: 500;
}

/* ===== 内容卡片 ===== */
.content-card {
  overflow: hidden;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(255,255,255,0.05), rgba(255,255,255,0.01));
  border: 1px solid var(--line-glass);
  transition: all .3s ease;
  display: flex;
  flex-direction: column;
}
.content-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255,255,255,0.14);
  box-shadow: 0 0 24px rgba(38,198,218,0.25), 0 8px 30px rgba(0,0,0,0.28);
}
.content-card .card-img-wrap {
  overflow: hidden;
  position: relative;
  aspect-ratio: 16/10;
}
.content-card .card-img-wrap img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.content-card:hover .card-img-wrap img { transform: scale(1.05); }
.card-category {
  position: absolute;
  top: 12px; left: 12px;
  background: rgba(6,18,26,0.7);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(38,198,218,0.3);
  color: var(--accent);
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 999px;
  letter-spacing: 0.3px;
}
.card-body {
  padding: 18px 18px 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.card-title {
  font-size: 16px;
  font-weight: 500;
  line-height: 1.4;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  color: var(--text-primary);
  transition: color .2s;
}
.content-card:hover .card-title { color: var(--accent); }
.card-excerpt {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 12px;
  flex: 1;
}
.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
  border-top: 1px solid rgba(255,255,255,0.05);
  padding-top: 12px;
}
.card-meta .read-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--accent);
  font-weight: 500;
  transition: all .2s;
  font-size: 13px;
}
.card-meta .read-link i { transition: transform .2s; font-size: 12px; }
.card-meta .read-link:hover i { transform: translateX(3px); }

/* ===== 时间线 ===== */
.timeline-wrap {
  position: relative;
  padding-left: 28px;
}
.timeline-wrap::before {
  content: '';
  position: absolute;
  left: 8px; top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, rgba(38,198,218,0.6), rgba(38,198,218,0.05));
}
.timeline-item {
  position: relative;
  padding: 18px 0;
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -24px; top: 24px;
  width: 9px; height: 9px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 10px rgba(38,198,218,0.6);
}
.timeline-time {
  font-size: 14px;
  color: var(--accent);
  font-weight: 500;
  letter-spacing: 0.5px;
}
.timeline-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  margin-top: 2px;
}
.timeline-desc {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ===== FAQ ===== */
.faq-item {
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: background .25s;
}
.faq-item:last-child { border-bottom: none; }
.faq-question {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 22px 8px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  transition: color .2s;
  user-select: none;
}
.faq-question::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 0 6px rgba(38,198,218,0.5);
}
.faq-question .faq-icon {
  margin-left: auto;
  font-size: 16px;
  color: var(--text-muted);
  transition: transform .35s ease, color .2s;
  flex-shrink: 0;
  width: 24px; height: 24px;
  display: flex; align-items: center; justify-content: center;
}
.faq-item.open .faq-question .faq-icon {
  transform: rotate(45deg);
  color: var(--accent);
}
.faq-question:hover { color: var(--accent); }
.faq-answer {
  padding: 0 8px 20px 28px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.75;
  display: none;
  animation: fadeIn .25s ease;
}
.faq-item.open .faq-answer { display: block; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== 页脚 ===== */
.site-footer {
  background: #060A14;
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 56px 0 24px;
  position: relative;
  z-index: 10;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer-brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.3px;
}
.footer-brand-name span { color: var(--accent); }
.footer-brand-desc {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 10px;
  max-width: 240px;
  line-height: 1.6;
}
.footer-heading {
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 14px;
}
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  transition: color .2s;
}
.footer-links a:hover { color: var(--accent); }
.footer-bottom {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.06);
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
  letter-spacing: 0.5px;
}

/* ===== 底部固定转化条 ===== */
.bottom-cta-bar {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  max-width: 1200px;
  width: calc(100% - 32px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px 14px 24px;
  background: rgba(10,15,30,0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(38,198,218,0.2);
  border-radius: 16px;
  box-shadow: 0 0 30px rgba(38,198,218,0.15), 0 8px 30px rgba(0,0,0,0.4);
  z-index: 500;
  transition: transform .3s ease, opacity .3s ease;
}
.bottom-cta-bar.hidden-bar {
  transform: translateX(-50%) translateY(120%);
  opacity: 0;
  pointer-events: none;
}
.bottom-cta-text {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.bottom-cta-bar .btn-primary {
  padding: 10px 22px;
  font-size: 14px;
  flex-shrink: 0;
}
.bottom-cta-close {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 16px;
  border-radius: 8px;
  transition: all .2s;
  flex-shrink: 0;
}
.bottom-cta-close:hover {
  background: rgba(255,255,255,0.05);
  color: var(--text-primary);
}

/* ===== Hero ===== */
.hero-section {
  position: relative;
  padding: 88px 0 64px;
  overflow: hidden;
}
.hero-section::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 60%;
  height: 100%;
  background: linear-gradient(120deg, rgba(38,198,218,0.03) 0%, rgba(126,138,244,0.02) 100%);
  clip-path: polygon(25% 0, 100% 0, 100% 100%, 0% 100%);
  pointer-events: none;
}
.hero-img-wrap {
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid rgba(38,198,218,0.2);
  box-shadow: 0 0 40px rgba(38,198,218,0.1), 0 20px 60px rgba(0,0,0,0.4);
  position: relative;
  background: linear-gradient(135deg, rgba(38,198,218,0.06), rgba(10,15,30,0.9));
}
.hero-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.75;
}
.hero-img-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  padding: 20px;
  background: linear-gradient(to top, rgba(10,15,30,0.9) 0%, transparent 60%);
}
.hero-img-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-primary);
  background: rgba(10,15,30,0.7);
  border: 1px solid rgba(255,255,255,0.12);
  padding: 6px 14px;
  border-radius: 999px;
  backdrop-filter: blur(8px);
}

/* ===== 区块间距 ===== */
.section-padding { padding: 72px 0; }
@media (max-width: 1023px) {
  .section-padding { padding: 56px 0; }
}

/* ===== 分隔线 ===== */
.divider-glow {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(38,198,218,0.4), transparent);
  border: none;
}

/* ===== 响应式 ===== */
@media (max-width: 1023px) {
  .side-nav { display: none; }
  .mobile-topbar { display: flex; }
  .main-content { margin-left: 0; padding-top: 56px; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  body {
    padding-bottom: 64px;
  }
  .bottom-cta-bar {
    bottom: 0;
    width: 100%;
    max-width: 100%;
    border-radius: 0;
    padding: 12px 16px;
    border-left: none;
    border-right: none;
    border-bottom: none;
  }
}
@media (max-width: 640px) {
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .section-padding { padding: 48px 0; }
  .hero-section { padding: 48px 0 40px; }
  .container-main { padding: 0 16px; }
  .bottom-cta-text { font-size: 13px; }
  .bottom-cta-bar .btn-primary { padding: 9px 16px; font-size: 13px; }
}
@media (min-width: 640px) and (max-width: 1023px) {
  .bottom-cta-bar { border-radius: 16px; bottom: 12px; width: calc(100% - 32px); max-width: 640px; }
}

/* roulang page: article */
:root {
    --bg-base: #0A0F1E;
    --bg-elevated: #101A2E;
    --bg-deep: #070B16;
    --line-glass: rgba(255, 255, 255, 0.08);
    --bg-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.02));
    --accent: #26C6DA;
    --accent-strong: #22B8CC;
    --accent-2: #7E8AF4;
    --warning: #FFB020;
    --text-primary: #F5F7FF;
    --text-secondary: #9AA6C3;
    --text-muted: #5A6A8A;
    --radius: 16px;
    --radius-lg: 24px;
    --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.28);
    --shadow-glow: 0 0 24px rgba(38, 198, 218, 0.25);
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    background-color: var(--bg-base);
    background-image:
      radial-gradient(600px 400px at 10% 0%, rgba(38, 198, 218, 0.06), transparent 60%),
      radial-gradient(700px 500px at 90% 10%, rgba(126, 138, 244, 0.05), transparent 60%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    margin: 0;
    padding-bottom: 90px;
    -webkit-font-smoothing: antialiased;
  }

  @media (max-width: 767px) {
    body {
      padding-bottom: 76px;
    }
  }

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

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

  button,
  input {
    font-family: inherit;
  }

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

  @media (max-width: 520px) {
    .container {
      padding: 0 16px;
    }
  }

  /* ===== 左侧竖向导航（桌面） ===== */
  .side-nav {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 80px;
    background: var(--bg-deep);
    border-right: 1px solid var(--line-glass);
    z-index: 50;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 24px 0;
  }

  .side-nav-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    margin-bottom: 36px;
  }

  .brand-mark {
    font-size: 19px;
    font-weight: 800;
    color: var(--accent);
    letter-spacing: -0.5px;
    line-height: 1.1;
  }

  .brand-sub {
    font-size: 10px;
    color: var(--text-muted);
    letter-spacing: 2px;
    margin-top: 4px;
  }

  .side-nav-links {
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 100%;
    align-items: center;
  }

  .nav-item {
    position: relative;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    color: var(--text-muted);
    transition: all 0.25s ease;
  }

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

  .nav-item:hover {
    color: var(--accent);
    background: rgba(38, 198, 218, 0.08);
  }

  .nav-item.active {
    color: var(--accent);
    background: rgba(38, 198, 218, 0.1);
    box-shadow: inset 3px 0 0 var(--accent);
  }

  .nav-tooltip {
    position: absolute;
    left: 54px;
    top: 50%;
    transform: translateY(-50%) translateX(-4px);
    background: #0F1A2E;
    border: 1px solid var(--line-glass);
    color: var(--text-primary);
    font-size: 12px;
    padding: 6px 12px;
    border-radius: 8px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: all 0.2s ease;
    z-index: 60;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.35);
  }

  .nav-item:hover .nav-tooltip {
    opacity: 1;
    transform: translateY(-50%) translateX(0);
  }

  .nav-top {
    margin-top: auto;
  }

  /* ===== 移动端顶部导航 ===== */
  .mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 56px;
    background: rgba(7, 11, 22, 0.92);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line-glass);
    z-index: 60;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px;
  }

  .menu-toggle {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    border-radius: 12px;
    transition: background 0.2s;
  }

  .menu-toggle:hover {
    background: rgba(255, 255, 255, 0.06);
  }

  .menu-toggle svg {
    width: 22px;
    height: 22px;
  }

  .mobile-brand {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
  }

  .mobile-brand span {
    color: var(--accent);
  }

  .mobile-cta {
    background: var(--accent);
    color: #06121A;
    font-size: 13px;
    font-weight: 600;
    padding: 8px 14px;
    border-radius: 10px;
    box-shadow: 0 0 16px rgba(38, 198, 218, 0.3);
    transition: all 0.2s;
  }

  .mobile-cta:hover {
    filter: brightness(1.1);
  }

  /* ===== 移动端抽屉 ===== */
  .drawer-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 65;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
  }

  .drawer-overlay.open {
    opacity: 1;
    pointer-events: auto;
  }

  .drawer {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 280px;
    background: rgba(10, 15, 30, 0.97);
    backdrop-filter: blur(24px);
    z-index: 70;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    padding: 24px;
    display: flex;
    flex-direction: column;
  }

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

  .drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 32px;
  }

  .drawer-brand {
    font-size: 20px;
    font-weight: 700;
  }

  .drawer-brand span {
    color: var(--accent);
  }

  .drawer-close {
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 28px;
    line-height: 1;
    cursor: pointer;
    border-radius: 12px;
    transition: all 0.2s;
  }

  .drawer-close:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.06);
  }

  .drawer-links {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 32px;
  }

  .drawer-link {
    padding: 12px 16px;
    border-radius: 12px;
    color: var(--text-secondary);
    font-size: 15px;
    transition: all 0.2s;
  }

  .drawer-link:hover {
    background: rgba(38, 198, 218, 0.08);
    color: var(--accent);
  }

  .drawer-link.active {
    background: rgba(38, 198, 218, 0.1);
    color: var(--accent);
  }

  .drawer-btn {
    text-align: center;
  }

  @media (max-width: 1023px) {
    .side-nav {
      display: none;
    }
    .mobile-header {
      display: flex;
    }
    .site-main {
      margin-left: 0 !important;
      padding-top: 72px !important;
    }
    .site-footer {
      margin-left: 0 !important;
    }
  }

  /* ===== 主内容区 ===== */
  .site-main {
    margin-left: 80px;
    padding: 40px 24px 64px;
    min-height: calc(100vh - 200px);
  }

  @media (max-width: 767px) {
    .site-main {
      padding: 20px 16px 48px;
    }
  }

  /* ===== 文章 Hero 区块 ===== */
  .article-hero {
    position: relative;
    background:
      linear-gradient(135deg, rgba(10, 15, 30, 0.86), rgba(16, 26, 46, 0.72)),
      url('/assets/images/backpic/back-2.png') center / cover no-repeat;
    border: 1px solid var(--line-glass);
    border-radius: 24px;
    padding: 44px 36px;
    margin-bottom: 40px;
    box-shadow: var(--shadow-card), inset 0 1px 0 rgba(255, 255, 255, 0.06);
    overflow: hidden;
  }

  .article-hero::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 280px;
    height: 280px;
    background: radial-gradient(circle, rgba(38, 198, 218, 0.1), transparent 70%);
    pointer-events: none;
  }

  .breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 24px;
  }

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

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

  .breadcrumb-sep {
    color: var(--text-muted);
    opacity: 0.5;
  }

  .breadcrumb-current {
    color: var(--text-primary);
    max-width: 320px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px 20px;
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 14px;
  }

  .meta-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(38, 198, 218, 0.12);
    border: 1px solid rgba(38, 198, 218, 0.25);
    color: var(--accent);
    font-size: 12px;
    font-weight: 500;
    padding: 4px 12px;
    border-radius: 999px;
  }

  .meta-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
  }

  .article-title {
    font-size: clamp(1.75rem, 4vw, 2.6rem);
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.02em;
    margin: 8px 0 0;
    max-width: 860px;
  }

  .article-divider {
    height: 1px;
    background: linear-gradient(90deg, rgba(38, 198, 218, 0.5), rgba(255, 255, 255, 0.06) 60%, transparent);
    margin-top: 28px;
  }

  /* ===== 正文阅读区 ===== */
  .article-wrap {
    background: var(--bg-glass);
    border: 1px solid var(--line-glass);
    border-radius: var(--radius-lg);
    padding: 48px 48px 40px;
    box-shadow: var(--shadow-card), inset 1px 1px 0 rgba(255, 255, 255, 0.08);
    margin-bottom: 48px;
  }

  @media (max-width: 767px) {
    .article-wrap {
      padding: 28px 20px 24px;
    }
  }

  .article-body {
    max-width: 768px;
    margin: 0 auto;
    font-size: 16px;
    line-height: 1.85;
    color: rgba(245, 247, 255, 0.88);
  }

  @media (min-width: 1024px) {
    .article-body {
      font-size: 17px;
    }
  }

  .article-body p {
    margin-bottom: 28px;
    color: rgba(245, 247, 255, 0.88);
  }

  .article-body h2 {
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.35;
    color: var(--text-primary);
    margin: 40px 0 16px;
    letter-spacing: -0.01em;
  }

  .article-body h3 {
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.4;
    color: var(--text-primary);
    margin: 32px 0 12px;
  }

  .article-body ul,
  .article-body ol {
    margin-bottom: 28px;
    padding-left: 1.5em;
  }

  .article-body li {
    margin-bottom: 8px;
  }

  .article-body a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 2px;
  }

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

  .article-body img {
    border-radius: 12px;
    margin: 28px 0;
    box-shadow: var(--shadow-card);
  }

  .article-body blockquote {
    border-left: 3px solid var(--accent);
    background: rgba(38, 198, 218, 0.06);
    padding: 12px 20px;
    border-radius: 0 12px 12px 0;
    color: var(--text-secondary);
    margin: 28px 0;
  }

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

  .article-body code {
    background: rgba(255, 255, 255, 0.08);
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 0.9em;
  }

  .article-back {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
    justify-content: center;
    max-width: 768px;
    margin: 0 auto;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }

  /* ===== 空态 ===== */
  .empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 64px 24px;
  }

  .empty-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-glass);
    border: 1px solid var(--line-glass);
    margin-bottom: 20px;
  }

  .empty-icon svg {
    width: 24px;
    height: 24px;
    color: var(--text-muted);
  }

  .empty-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
  }

  .empty-desc {
    color: var(--text-muted);
    margin-bottom: 24px;
  }

  .related-empty {
    border: 1px dashed rgba(255, 255, 255, 0.12);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.02);
    padding: 48px 24px;
  }

  /* ===== 相关推荐 ===== */
  .related-section {
    margin-bottom: 56px;
  }

  .section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 28px;
  }

  .section-title {
    font-size: 24px;
    font-weight: 600;
    line-height: 1.35;
    margin: 0;
    position: relative;
    padding-left: 16px;
  }

  .section-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 6px;
    bottom: 6px;
    width: 4px;
    background: var(--accent);
    border-radius: 4px;
    box-shadow: 0 0 12px rgba(38, 198, 218, 0.6);
  }

  .section-sub {
    color: var(--text-muted);
    font-size: 14px;
    margin: 0;
  }

  .related-card {
    display: block;
    background: var(--bg-glass);
    border: 1px solid var(--line-glass);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all 0.3s ease;
  }

  .related-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.14);
    box-shadow: var(--shadow-glow), var(--shadow-card);
  }

  .related-cover {
    overflow: hidden;
    aspect-ratio: 16 / 10;
    background: var(--bg-elevated);
  }

  .related-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
  }

  .related-card:hover .related-cover img {
    transform: scale(1.05);
  }

  .related-body {
    padding: 20px;
  }

  .tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--accent);
    background: rgba(38, 198, 218, 0.1);
    border: 1px solid rgba(38, 198, 218, 0.2);
    padding: 3px 10px;
    border-radius: 999px;
    margin-bottom: 12px;
  }

  .related-title {
    font-size: 17px;
    font-weight: 600;
    line-height: 1.4;
    color: var(--text-primary);
    margin: 0 0 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .related-excerpt {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin: 0 0 14px;
  }

  .related-more {
    font-size: 14px;
    color: var(--accent);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: gap 0.2s ease;
  }

  .related-card:hover .related-more {
    gap: 8px;
  }

  /* ===== 按钮 ===== */
  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    color: #06121A;
    font-weight: 600;
    font-size: 15px;
    padding: 12px 24px;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.25s ease;
    box-shadow: 0 0 24px rgba(38, 198, 218, 0.35);
  }

  .btn-primary:hover {
    filter: brightness(1.1);
    box-shadow: 0 0 34px rgba(38, 198, 218, 0.55);
  }

  .btn-primary:active {
    transform: translateY(2px);
  }

  .btn-primary:focus-visible {
    outline: 2px solid rgba(103, 232, 249, 0.7);
    outline-offset: 2px;
  }

  .btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--text-primary);
    font-weight: 500;
    font-size: 15px;
    padding: 12px 24px;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.25s ease;
  }

  .btn-ghost:hover {
    border-color: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.08);
  }

  .btn-ghost:active {
    transform: translateY(0);
  }

  .btn-ghost:focus-visible {
    outline: 2px solid rgba(255, 255, 255, 0.3);
    outline-offset: 2px;
  }

  /* ===== 底部固定转化条 ===== */
  .footer-cta {
    position: fixed;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 24px);
    max-width: 1200px;
    background: rgba(16, 26, 46, 0.92);
    backdrop-filter: blur(18px);
    border: 1px solid var(--line-glass);
    border-radius: 16px;
    padding: 14px 18px;
    z-index: 55;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4), 0 0 24px rgba(38, 198, 218, 0.08);
  }

  .footer-cta-text {
    margin: 0;
    font-size: 15px;
    color: var(--text-primary);
    font-weight: 500;
    line-height: 1.4;
  }

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

  .footer-cta .btn-primary {
    padding: 10px 18px;
    font-size: 14px;
  }

  .footer-cta-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.06);
    border: none;
    color: var(--text-muted);
    font-size: 20px;
    line-height: 1;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
  }

  .footer-cta-close:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
  }

  @media (max-width: 767px) {
    .footer-cta {
      flex-direction: row;
      align-items: center;
      gap: 10px;
      bottom: 8px;
      padding: 12px 14px;
    }
    .footer-cta-text {
      font-size: 13px;
    }
  }

  /* ===== 页脚 ===== */
  .site-footer {
    background: #060A14;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    margin-left: 0;
    padding: 64px 0 32px;
    font-size: 14px;
  }

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

  @media (max-width: 900px) {
    .footer-grid {
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
  }

  @media (max-width: 520px) {
    .footer-grid {
      grid-template-columns: 1fr;
      gap: 28px;
    }
  }

  .footer-brand-name {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.01em;
  }

  .footer-brand-name span {
    color: var(--accent);
  }

  .footer-brand-desc {
    color: var(--text-muted);
    margin-top: 8px;
    max-width: 280px;
    line-height: 1.6;
  }

  .footer-heading {
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 600;
    margin: 0 0 16px;
  }

  .footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
  }

  .footer-links li {
    margin-bottom: 10px;
  }

  .footer-links a {
    color: var(--text-secondary);
    transition: color 0.2s ease;
  }

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

  .footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    margin-top: 40px;
    padding-top: 24px;
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
  }

/* roulang page: category3 */
:root {
    --bg-base: #0A0F1E;
    --bg-elevated: #101A2E;
    --line-glass: rgba(255, 255, 255, 0.08);
    --bg-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.02));
    --accent: #26C6DA;
    --accent-strong: #22B8CC;
    --accent-2: #7E8AF4;
    --warning: #FFB020;
    --text-primary: #F5F7FF;
    --text-secondary: #9AA6C3;
    --text-muted: #5A6A8A;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
    background: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
  }

  body::before,
  body::after {
    content: '';
    position: fixed;
    top: -10%;
    width: 480px;
    height: 480px;
    pointer-events: none;
    z-index: 0;
    border-radius: 50%;
  }

  body::before {
    left: -180px;
    background: radial-gradient(circle, rgba(38, 198, 218, 0.06), transparent 70%);
  }

  body::after {
    right: -180px;
    top: 20%;
    background: radial-gradient(circle, rgba(126, 138, 244, 0.05), transparent 70%);
  }

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

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

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

  /* ===== 左侧竖向导航 ===== */
  .side-nav {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: 78px;
    background: #070B16;
    border-right: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px 0 16px;
    z-index: 100;
  }

  .side-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 28px;
  }

  .side-brand-badge {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(38, 198, 218, 0.25), rgba(126, 138, 244, 0.18));
    border: 1px solid rgba(38, 198, 218, 0.35);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 15px;
    letter-spacing: 0.5px;
    color: var(--accent);
    box-shadow: 0 0 20px rgba(38, 198, 218, 0.15);
  }

  .side-brand-sub {
    font-size: 10px;
    color: var(--text-muted);
    letter-spacing: 2px;
    margin-top: 6px;
    text-transform: uppercase;
  }

  .side-nav-links {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    width: 100%;
    padding: 0 10px;
    flex: 1;
  }

  .nav-item {
    position: relative;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    color: var(--text-muted);
    transition: all 0.25s ease;
  }

  .nav-item svg {
    width: 22px;
    height: 22px;
  }

  .nav-item:hover {
    color: var(--accent);
    background: rgba(38, 198, 218, 0.08);
    box-shadow: 0 0 16px rgba(38, 198, 218, 0.12);
  }

  .nav-item.active {
    color: var(--accent);
    background: rgba(38, 198, 218, 0.1);
  }

  .nav-item.active::before {
    content: '';
    position: absolute;
    left: -10px;
    top: 14px;
    bottom: 14px;
    width: 3px;
    border-radius: 0 3px 3px 0;
    background: var(--accent);
    box-shadow: 0 0 10px rgba(38, 198, 218, 0.5);
  }

  .nav-tooltip {
    position: absolute;
    left: calc(100% + 14px);
    top: 50%;
    transform: translateY(-50%) translateX(-6px);
    white-space: nowrap;
    background: #101A2E;
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 12px;
    color: var(--text-primary);
    opacity: 0;
    pointer-events: none;
    transition: all 0.2s ease;
    z-index: 50;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
  }

  .nav-item:hover .nav-tooltip {
    opacity: 1;
    transform: translateY(-50%) translateX(0);
  }

  .side-nav-bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    margin-top: auto;
  }

  .side-toggle-btn {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.25s ease;
  }

  .side-toggle-btn:hover {
    color: var(--accent);
    border-color: rgba(38, 198, 218, 0.3);
  }

  /* ===== 移动端顶部导航 ===== */
  .mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 56px;
    background: rgba(7, 11, 22, 0.9);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
    z-index: 90;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
  }

  .mobile-header-left {
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .menu-btn {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: none;
    background: transparent;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
  }

  .menu-btn svg {
    width: 22px;
    height: 22px;
  }

  .mobile-brand-text {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.3px;
  }

  .mobile-brand-text span {
    color: var(--accent);
  }

  .mobile-header-cta a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--accent);
    color: #06121A;
    font-size: 12px;
    font-weight: 600;
    padding: 8px 14px;
    border-radius: 20px;
    transition: all 0.25s ease;
  }

  .mobile-header-cta a:hover {
    box-shadow: 0 0 20px rgba(38, 198, 218, 0.4);
  }

  /* 移动端抽屉 */
  .mobile-drawer {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 280px;
    background: rgba(7, 11, 22, 0.97);
    backdrop-filter: blur(24px);
    border-right: 1px solid rgba(255, 255, 255, 0.08);
    z-index: 200;
    padding: 24px 20px;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }

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

  .drawer-brand {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
  }

  .drawer-brand span {
    color: var(--accent);
  }

  .drawer-sub {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 28px;
  }

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

  .drawer-links a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border-radius: 12px;
    font-size: 15px;
    color: var(--text-secondary);
    transition: all 0.2s ease;
  }

  .drawer-links a:hover,
  .drawer-links a.active {
    background: rgba(38, 198, 218, 0.08);
    color: var(--accent);
  }

  .drawer-links a svg {
    width: 20px;
    height: 20px;
  }

  .drawer-cta {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .drawer-cta .btn-primary,
  .drawer-cta .btn-ghost {
    justify-content: center;
  }

  .drawer-mask {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(2px);
    z-index: 190;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
  }

  .drawer-mask.show {
    opacity: 1;
    pointer-events: auto;
  }

  /* ===== 主要内容区 ===== */
  .main-content {
    margin-left: 78px;
    position: relative;
    z-index: 1;
  }

  /* ===== 组件 ===== */
  .glass-card {
    background: var(--bg-glass);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    border: 1px solid var(--line-glass);
    border-radius: 16px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.28);
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    overflow: hidden;
  }

  .glass-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.14);
    box-shadow: 0 0 24px rgba(38, 198, 218, 0.25), 0 8px 30px rgba(0, 0, 0, 0.28);
  }

  .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--accent);
    color: #06121A;
    font-weight: 600;
    font-size: 15px;
    padding: 12px 28px;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    box-shadow: 0 0 24px rgba(38, 198, 218, 0.35);
    transition: all 0.25s ease;
    min-height: 44px;
  }

  .btn-primary:hover {
    filter: brightness(1.1);
    box-shadow: 0 0 34px rgba(38, 198, 218, 0.55);
    transform: translateY(-1px);
  }

  .btn-primary:active {
    transform: translateY(1px);
  }

  .btn-primary:focus-visible {
    outline: 2px solid rgba(38, 198, 218, 0.7);
    outline-offset: 2px;
  }

  .btn-ghost {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    font-weight: 500;
    font-size: 15px;
    padding: 12px 28px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    cursor: pointer;
    transition: all 0.25s ease;
    min-height: 44px;
  }

  .btn-ghost:hover {
    border-color: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
  }

  .btn-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--accent);
    font-weight: 500;
    font-size: 14px;
    transition: gap 0.25s ease;
  }

  .btn-link:hover {
    gap: 10px;
  }

  .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    background: rgba(255, 255, 255, 0.04);
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
  }

  .badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 8px rgba(38, 198, 218, 0.6);
  }

  .category-chip {
    display: inline-flex;
    align-items: center;
    padding: 8px 18px;
    border-radius: 999px;
    font-size: 13px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.25s ease;
    min-height: 36px;
  }

  .category-chip:hover,
  .category-chip.active {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(38, 198, 218, 0.08);
    box-shadow: 0 0 16px rgba(38, 198, 218, 0.15);
  }

  .section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--accent);
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 12px;
    font-weight: 500;
  }

  .section-title {
    font-size: 28px;
    font-weight: 600;
    line-height: 1.35;
    color: var(--text-primary);
    letter-spacing: -0.3px;
  }

  .section-desc {
    font-size: 15px;
    color: var(--text-secondary);
    margin-top: 10px;
    max-width: 640px;
  }

  .cover-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
  }

  /* FAQ 手风琴 */
  .faq-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .faq-question {
    padding: 20px 8px;
    display: flex;
    align-items: center;
    gap: 14px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-primary);
    transition: color 0.2s ease;
    min-height: 56px;
  }

  .faq-question::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 8px rgba(38, 198, 218, 0.5);
    flex-shrink: 0;
  }

  .faq-question .faq-icon {
    margin-left: auto;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--text-muted);
    transition: transform 0.3s ease;
    flex-shrink: 0;
  }

  .faq-item.open .faq-icon {
    transform: rotate(45deg);
    color: var(--accent);
  }

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

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
    padding-left: 28px;
    padding-right: 24px;
  }

  .faq-answer-inner {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    padding: 0 0 20px;
  }

  .faq-item.open .faq-answer {
    max-height: 320px;
  }

  .faq-item.open .faq-question {
    background: rgba(255, 255, 255, 0.02);
  }

  /* ===== Hero ===== */
  .category-hero {
    position: relative;
    padding: 72px 0 56px;
    background: linear-gradient(135deg, rgba(16, 26, 46, 0.6), rgba(10, 15, 30, 0.8)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  }

  .category-hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(38, 198, 218, 0.4), transparent);
  }

  .breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 16px;
    flex-wrap: wrap;
  }

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

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

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

  .breadcrumb .current {
    color: var(--text-secondary);
  }

  .hero-h1 {
    font-size: 42px;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.5px;
    color: var(--text-primary);
    margin-bottom: 16px;
  }

  .hero-desc {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    max-width: 620px;
    margin-bottom: 28px;
  }

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

  /* ===== 卡片网格 ===== */
  .support-card {
    position: relative;
    padding: 0;
    border-radius: 16px;
    overflow: hidden;
  }

  .support-card .card-img-wrap {
    height: 170px;
    overflow: hidden;
    position: relative;
  }

  .support-card .card-img-wrap::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(10, 15, 30, 0.8), transparent 60%);
  }

  .support-card .card-body {
    padding: 20px;
  }

  .support-card .card-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
  }

  .support-card .card-text {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
  }

  .step-card {
    text-align: center;
    padding: 28px 20px;
  }

  .step-number {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    background: rgba(38, 198, 218, 0.1);
    border: 1px solid rgba(38, 198, 218, 0.3);
    color: var(--accent);
    box-shadow: 0 0 20px rgba(38, 198, 218, 0.15);
    margin: 0 auto 16px;
  }

  .step-card h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
  }

  .step-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
  }

  /* CTA 区域 */
  .cta-section {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    padding: 48px;
    background: linear-gradient(135deg, rgba(38, 198, 218, 0.1), rgba(126, 138, 244, 0.08)), var(--bg-elevated);
    border: 1px solid var(--line-glass);
  }

  /* ===== 页脚 ===== */
  .site-footer {
    margin-left: 78px;
    position: relative;
    background: #060A14;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 48px;
    z-index: 1;
  }

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

  .footer-brand-name {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
  }

  .footer-brand-name span {
    color: var(--accent);
  }

  .footer-brand-desc {
    font-size: 14px;
    color: var(--text-muted);
    max-width: 260px;
    line-height: 1.7;
  }

  .footer-heading {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    letter-spacing: 0.5px;
  }

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

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

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

  .footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding: 20px 0;
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
  }

  /* 底部固定转化条 */
  .bottom-bar {
    position: fixed;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    max-width: 1200px;
    width: calc(100% - 32px);
    z-index: 80;
    background: rgba(16, 26, 46, 0.92);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45), 0 0 24px rgba(38, 198, 218, 0.08);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px 12px 24px;
  }

  .bottom-bar-text {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
  }

  .bottom-bar-text span {
    color: var(--accent);
  }

  .bottom-bar .btn-primary {
    padding: 10px 20px;
    font-size: 14px;
    min-height: 40px;
  }

  .bottom-bar-close {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-left: 10px;
    flex-shrink: 0;
  }

  .bottom-bar-close:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
  }

  /* 统计块 */
  .stat-block {
    text-align: center;
    padding: 24px 16px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: all 0.3s ease;
  }

  .stat-block:hover {
    border-color: rgba(38, 198, 218, 0.25);
    box-shadow: 0 0 20px rgba(38, 198, 218, 0.08);
  }

  .stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--accent);
    line-height: 1.2;
  }

  .stat-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 6px;
  }

  /* ===== 响应式 ===== */
  @media (max-width: 1024px) {
    .side-nav {
      display: none;
    }

    .mobile-header {
      display: flex;
    }

    .main-content {
      margin-left: 0;
      padding-top: 56px;
    }

    .site-footer {
      margin-left: 0;
    }

    body {
      padding-bottom: 64px;
    }

    .container {
      padding: 0 20px;
    }
  }

  @media (max-width: 768px) {
    .hero-h1 {
      font-size: 32px;
    }

    .section-title {
      font-size: 24px;
    }

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

    .cta-section {
      padding: 32px 20px;
    }

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

    .bottom-bar {
      bottom: 8px;
      width: calc(100% - 16px);
      padding: 10px 12px 10px 16px;
    }

    .bottom-bar-text {
      font-size: 12px;
    }

    .bottom-bar .btn-primary {
      font-size: 12px;
      padding: 8px 14px;
      min-height: 36px;
    }
  }

  @media (max-width: 520px) {
    .container {
      padding: 0 16px;
    }

    .hero-h1 {
      font-size: 26px;
    }

    .hero-desc {
      font-size: 14px;
    }

    .hero-actions {
      flex-direction: column;
      align-items: stretch;
    }

    .hero-actions .btn-primary,
    .hero-actions .btn-ghost {
      justify-content: center;
      width: 100%;
    }

    .category-chip {
      font-size: 12px;
      padding: 6px 12px;
    }

    .bottom-bar {
      padding: 8px 10px;
    }

    .bottom-bar-text {
      display: none;
    }

    .bottom-bar .btn-primary {
      flex: 1;
    }
  }

/* roulang page: category2 */
:root {
  --bg-base: #0A0F1E;
  --bg-elevated: #101A2E;
  --line-glass: rgba(255,255,255,0.08);
  --bg-glass: linear-gradient(135deg, rgba(255,255,255,0.07), rgba(255,255,255,0.02));
  --accent: #26C6DA;
  --accent-strong: #22B8CC;
  --accent-2: #7E8AF4;
  --warning: #FFB020;
  --text-primary: #F5F7FF;
  --text-secondary: #9AA6C3;
  --text-muted: #5A6A8A;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html { scroll-behavior: smooth; }
body {
  font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 0;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.ambient-glow {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 640px;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(620px 320px at 12% 6%, rgba(38,198,218,0.06), transparent 70%),
    radial-gradient(640px 340px at 88% 2%, rgba(126,138,244,0.05), transparent 70%);
}

/* 左侧竖向导航 */
.side-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 80px;
  height: 100vh;
  background: #070B16;
  border-right: 1px solid rgba(255,255,255,0.08);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 22px 0 18px;
  z-index: 50;
}
.side-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  color: var(--accent);
}
.side-brand-mark {
  font-size: 26px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
}
.side-brand-sub {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--text-secondary);
  margin-top: 2px;
}
.side-nav-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 36px;
  flex: 1;
  align-items: center;
}
.nav-item {
  position: relative;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  color: var(--text-muted);
  transition: all 0.25s ease;
}
.nav-item svg {
  width: 22px;
  height: 22px;
}
.nav-item:hover {
  color: var(--accent);
  background: rgba(38,198,218,0.08);
}
.nav-item.active {
  color: var(--accent);
  background: rgba(38,198,218,0.12);
}
.nav-item.active::before {
  content: '';
  position: absolute;
  left: -16px;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 24px;
  border-radius: 2px;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(38,198,218,0.6);
}
.nav-tooltip {
  position: absolute;
  left: 56px;
  top: 50%;
  transform: translateY(-50%) translateX(4px);
  background: var(--bg-elevated);
  border: 1px solid var(--line-glass);
  color: var(--text-primary);
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 8px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: all 0.2s ease;
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}
.nav-item:hover .nav-tooltip {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}
.side-top-btn {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  color: var(--text-muted);
  transition: all 0.25s ease;
}
.side-top-btn:hover {
  color: var(--accent);
  background: rgba(38,198,218,0.08);
}

/* 移动端顶部导航 */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  background: rgba(7,11,22,0.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line-glass);
  z-index: 60;
}
.menu-btn {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  color: var(--text-primary);
}
.menu-btn:hover {
  background: rgba(255,255,255,0.06);
}
.mobile-brand {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}
.mobile-brand span {
  color: var(--accent);
}
.mobile-cta {
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 14px;
  border-radius: 10px;
  background: var(--accent);
  color: #06121A;
  font-size: 13px;
  font-weight: 600;
  box-shadow: 0 0 18px rgba(38,198,218,0.35);
}
.mobile-cta:hover {
  background: #29d2e6;
}

/* 抽屉 */
.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(4,7,14,0.6);
  backdrop-filter: blur(4px);
  z-index: 70;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.drawer-overlay.show {
  opacity: 1;
  pointer-events: auto;
}
.drawer {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 280px;
  background: rgba(10,15,30,0.96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-right: 1px solid var(--line-glass);
  z-index: 80;
  padding: 24px 20px;
  transform: translateX(-100%);
  transition: transform 0.32s ease;
  display: flex;
  flex-direction: column;
}
.drawer.open {
  transform: translateX(0);
}
.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}
.drawer-brand {
  font-size: 19px;
  font-weight: 700;
  color: var(--text-primary);
}
.drawer-brand span {
  color: var(--accent);
}
.drawer-close {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  color: var(--text-secondary);
  font-size: 22px;
}
.drawer-close:hover {
  background: rgba(255,255,255,0.06);
  color: var(--text-primary);
}
.drawer-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}
.drawer-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 14px;
  border-radius: 12px;
  color: var(--text-secondary);
  font-size: 15px;
  transition: all 0.25s ease;
}
.drawer-link svg {
  width: 20px;
  height: 20px;
}
.drawer-link:hover {
  background: rgba(255,255,255,0.05);
  color: var(--text-primary);
}
.drawer-link.active {
  background: rgba(38,198,218,0.1);
  color: var(--accent);
}
.drawer-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 46px;
  border-radius: 12px;
  background: var(--accent);
  color: #06121A;
  font-weight: 600;
  margin-top: 16px;
  box-shadow: 0 0 24px rgba(38,198,218,0.35);
}

/* 主体 */
.site-main {
  margin-left: 80px;
  position: relative;
  z-index: 1;
  padding-bottom: 100px;
}
.section-block {
  padding: 72px 0;
}
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 40px;
}
.section-title {
  font-size: 28px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}
.section-title-line {
  display: inline-block;
  width: 4px;
  height: 22px;
  border-radius: 2px;
  background: var(--accent);
  margin-right: 12px;
  vertical-align: -3px;
  box-shadow: 0 0 10px rgba(38,198,218,0.5);
}
.section-sub {
  color: var(--text-secondary);
  font-size: 15px;
  margin-top: 6px;
}

/* Hero */
.hero-section {
  padding: 80px 0 64px;
  position: relative;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--accent);
  border: 1px solid rgba(38,198,218,0.3);
  background: rgba(38,198,218,0.08);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.hero-kicker i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
  box-shadow: 0 0 8px rgba(38,198,218,0.6);
}
.hero-title {
  font-size: 44px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}
.hero-title span {
  color: var(--accent);
}
.hero-desc {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 28px;
  max-width: 480px;
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.hero-trust {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.hero-trust-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-secondary);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 999px;
  padding: 5px 12px;
}
.hero-trust-item i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-2);
}
.hero-visual {
  position: relative;
}
.hero-glass {
  position: relative;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid rgba(38,198,218,0.25);
  box-shadow: 0 0 40px rgba(38,198,218,0.14), 0 20px 50px rgba(0,0,0,0.35);
}
.hero-glass::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(38,198,218,0.08), transparent 45%);
  pointer-events: none;
}
.hero-glass img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  display: block;
}
.hero-glass-meta {
  position: absolute;
  left: 20px;
  bottom: 20px;
  right: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(7,11,22,0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 14px;
  padding: 12px 16px;
  z-index: 2;
}
.hero-glass-meta span {
  font-size: 14px;
  color: var(--text-primary);
  font-weight: 500;
}
.hero-glass-meta small {
  font-size: 12px;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 6px;
}
.hero-glass-meta small i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse-dot 1.8s infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(38,198,218,0.6); }
  50% { opacity: 0.6; box-shadow: 0 0 0 6px rgba(38,198,218,0); }
}
.hero-line {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(38,198,218,0.6), transparent);
  margin-top: 64px;
  box-shadow: 0 0 12px rgba(38,198,218,0.4);
}

/* 按钮 */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #06121A;
  font-weight: 600;
  padding: 12px 26px;
  border-radius: 12px;
  box-shadow: 0 0 24px rgba(38,198,218,0.35);
  transition: all 0.25s ease;
  font-size: 15px;
}
.btn-primary:hover {
  background: #29d2e6;
  box-shadow: 0 0 34px rgba(38,198,218,0.55);
  transform: translateY(-1px);
}
.btn-primary:active {
  transform: translateY(1px);
}
.btn-primary:focus-visible {
  outline: 2px solid rgba(38,198,218,0.7);
  outline-offset: 2px;
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.15);
  color: var(--text-primary);
  padding: 12px 26px;
  border-radius: 12px;
  font-size: 15px;
  transition: all 0.25s ease;
}
.btn-ghost:hover {
  border-color: rgba(255,255,255,0.28);
  background: rgba(255,255,255,0.08);
  transform: translateY(-2px);
}
.btn-ghost:active {
  transform: translateY(0);
}
.btn-sm {
  padding: 8px 18px;
  font-size: 13px;
  border-radius: 10px;
}

/* 玻璃卡片 */
.glass-card {
  background: var(--bg-glass);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--line-glass);
  border-radius: 16px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.28);
  transition: all 0.3s ease;
}
.glass-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255,255,255,0.14);
  box-shadow: 0 0 24px rgba(38,198,218,0.25), 0 12px 30px rgba(0,0,0,0.3);
}

/* 统计条 */
.stats-band {
  padding: 24px 0 8px;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.stat-card {
  padding: 26px 20px;
  text-align: center;
  border-radius: 16px;
}
.stat-num {
  font-size: 30px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.stat-label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 6px;
}

/* 动态卡片 */
.dynamic-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.dynamic-card {
  border-radius: 16px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.dynamic-cover {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}
.dynamic-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}
.dynamic-card:hover .dynamic-cover img {
  transform: scale(1.05);
}
.dynamic-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  font-size: 12px;
  color: #fff;
  background: rgba(7,11,22,0.72);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.14);
  padding: 4px 12px;
  border-radius: 999px;
}
.dynamic-body {
  padding: 20px 20px 18px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.dynamic-title {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.dynamic-summary {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.dynamic-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.dynamic-date {
  font-size: 13px;
  color: var(--text-muted);
}
.dynamic-more {
  font-size: 13px;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.2s ease;
}
.dynamic-more:hover {
  gap: 8px;
}

/* 筛选条 */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 16px 20px;
  border-radius: 16px;
  margin-bottom: 40px;
}
.filter-chip {
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.12);
  font-size: 13px;
  color: var(--text-secondary);
  transition: all 0.25s ease;
  background: transparent;
}
.filter-chip:hover {
  border-color: rgba(38,198,218,0.5);
  color: var(--accent);
}
.filter-chip.active {
  background: rgba(38,198,218,0.12);
  border-color: var(--accent);
  color: var(--accent);
}

/* 多主题横向滚动 */
.topics-scroll {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  padding: 4px 4px 20px;
  scrollbar-width: thin;
  scrollbar-color: rgba(38,198,218,0.3) transparent;
}
.topics-scroll::-webkit-scrollbar {
  height: 6px;
}
.topics-scroll::-webkit-scrollbar-thumb {
  background: rgba(38,198,218,0.3);
  border-radius: 4px;
}
.topic-card {
  min-width: 260px;
  max-width: 260px;
  border-radius: 16px;
  overflow: hidden;
  flex-shrink: 0;
  background: var(--bg-glass);
  border: 1px solid var(--line-glass);
  transition: all 0.3s ease;
}
.topic-card:hover {
  transform: translateY(-4px);
  border-color: rgba(38,198,218,0.4);
  box-shadow: 0 0 20px rgba(38,198,218,0.18);
}
.topic-cover {
  height: 130px;
  overflow: hidden;
}
.topic-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}
.topic-card:hover .topic-cover img {
  transform: scale(1.05);
}
.topic-body {
  padding: 16px;
}
.topic-body h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.topic-body p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 流程 */
.flow-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
}
.flow-step {
  position: relative;
  padding: 28px 22px;
  border-radius: 16px;
  background: var(--bg-glass);
  border: 1px solid var(--line-glass);
  transition: all 0.3s ease;
}
.flow-step:hover {
  transform: translateY(-4px);
  border-color: rgba(38,198,218,0.35);
  box-shadow: 0 0 20px rgba(38,198,218,0.15);
}
.flow-num {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--accent);
  border: 1px solid rgba(38,198,218,0.3);
  background: rgba(38,198,218,0.08);
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.flow-step h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}
.flow-step p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
}
.flow-arrow {
  position: absolute;
  right: -17px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent);
  font-size: 18px;
  z-index: 2;
  background: #0A0F1E;
  border-radius: 50%;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(38,198,218,0.3);
}

/* 价值三卡 */
.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.value-card {
  position: relative;
  padding: 30px 26px;
  border-radius: 20px;
  background: var(--bg-glass);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--line-glass);
  box-shadow: 0 8px 30px rgba(0,0,0,0.28);
  transition: all 0.3s ease;
}
.value-card:hover {
  transform: translateY(-4px);
  border-color: rgba(38,198,218,0.25);
  box-shadow: 0 0 24px rgba(38,198,218,0.18);
}
.value-card .core-tag {
  position: absolute;
  top: 12px;
  right: 12px;
  font-size: 11px;
  color: #06121A;
  background: var(--accent);
  padding: 3px 8px;
  border-radius: 999px;
  font-weight: 700;
}
.value-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: rgba(38,198,218,0.1);
  color: var(--accent);
  margin-bottom: 18px;
}
.value-icon.v2 {
  background: rgba(126,138,244,0.12);
  color: var(--accent-2);
}
.value-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.value-card p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-secondary);
}

/* FAQ */
.faq-list {
  border-radius: 20px;
  padding: 8px 28px;
  background: var(--bg-glass);
  border: 1px solid var(--line-glass);
}
.faq-item {
  border-bottom: 1px solid rgba(255,255,255,0.07);
}
.faq-item:last-child {
  border-bottom: none;
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
  text-align: left;
  gap: 12px;
  transition: color 0.2s ease;
}
.faq-question:hover {
  color: var(--accent);
}
.faq-q-left {
  display: flex;
  align-items: center;
  gap: 12px;
}
.faq-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px rgba(38,198,218,0.5);
  flex-shrink: 0;
}
.faq-icon {
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  border: 1px solid rgba(255,255,255,0.12);
  color: var(--text-secondary);
  font-size: 15px;
  transition: all 0.3s ease;
  flex-shrink: 0;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
  color: var(--accent);
  border-color: rgba(38,198,218,0.4);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  color: #b8c2dd;
  font-size: 14px;
  line-height: 1.85;
}
.faq-item.open .faq-answer {
  max-height: 300px;
  padding-bottom: 22px;
}

/* CTA */
.cta-section {
  padding: 24px 0 72px;
}
.cta-card {
  position: relative;
  overflow: hidden;
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(38,198,218,0.12), rgba(126,138,244,0.08));
  border: 1px solid rgba(38,198,218,0.28);
  padding: 48px 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  box-shadow: 0 0 40px rgba(38,198,218,0.1);
}
.cta-card::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -40px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(38,198,218,0.18), transparent 70%);
  pointer-events: none;
}
.cta-copy h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}
.cta-copy p {
  font-size: 15px;
  color: var(--text-secondary);
}
.cta-actions {
  display: flex;
  gap: 12px;
  flex-shrink: 0;
}

/* 页脚 */
.site-footer {
  background: #060A14;
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 56px 0 110px;
  position: relative;
  z-index: 1;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}
.footer-brand-name span {
  color: var(--accent);
}
.footer-brand-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.footer-heading {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 14px;
  letter-spacing: 0.04em;
}
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}
.footer-links a:hover {
  color: var(--accent);
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 24px;
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
}

/* 底部固定转化条 */
.sticky-cta {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 32px);
  max-width: 1080px;
  background: rgba(14,22,40,0.86);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(38,198,218,0.25);
  border-radius: 16px;
  padding: 12px 18px 12px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.4), 0 0 24px rgba(38,198,218,0.12);
  z-index: 40;
  transition: transform 0.4s ease, opacity 0.4s ease;
}
.sticky-cta.hidden-bar {
  transform: translateX(-50%) translateY(120%);
  opacity: 0;
  pointer-events: none;
}
.sticky-cta-text {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
}
.sticky-cta-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}
.sticky-cta-close {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  color: var(--text-muted);
  font-size: 18px;
  transition: all 0.2s ease;
}
.sticky-cta-close:hover {
  background: rgba(255,255,255,0.06);
  color: var(--text-primary);
}

/* 响应式 */
@media (max-width: 1023px) {
  .side-nav {
    display: none;
  }
  .mobile-header {
    display: flex;
  }
  .site-main {
    margin-left: 0;
    padding-top: 56px;
  }
  body {
    padding-bottom: 64px;
  }
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .hero-title {
    font-size: 36px;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .dynamic-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .flow-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .flow-arrow {
    display: none;
  }
  .value-grid {
    grid-template-columns: 1fr;
  }
  .cta-card {
    flex-direction: column;
    align-items: flex-start;
    padding: 36px 28px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .section-block {
    padding: 56px 0;
  }
  .hero-section {
    padding: 48px 0 40px;
  }
}

@media (max-width: 767px) {
  .container {
    padding: 0 18px;
  }
  .hero-title {
    font-size: 30px;
  }
  .hero-desc {
    font-size: 15px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn-primary,
  .hero-actions .btn-ghost {
    justify-content: center;
  }
  .hero-glass img {
    height: 240px;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }
  .stat-card {
    padding: 20px 14px;
  }
  .stat-num {
    font-size: 24px;
  }
  .dynamic-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .flow-grid {
    grid-template-columns: 1fr;
  }
  .section-head {
    flex-direction: column;
    align-items: flex-start;
    margin-bottom: 28px;
  }
  .section-title {
    font-size: 24px;
  }
  .topic-card {
    min-width: 220px;
    max-width: 220px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .cta-actions {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
  }
  .cta-actions .btn-primary,
  .cta-actions .btn-ghost {
    justify-content: center;
  }
  .sticky-cta-text {
    font-size: 13px;
  }
  .sticky-cta {
    padding: 10px 14px;
  }
  .sticky-cta .btn-sm {
    padding: 7px 12px;
  }
}