/* roulang page: index */
:root {
  --bg-primary: #0a1628;
  --bg-secondary: #0d1b2a;
  --bg-tertiary: #102a43;
  --accent-blue: #1e90ff;
  --glow-blue: #38bdf8;
  --neon-cyan: #00d4ff;
  --text-title: #e6f1ff;
  --text-body: #b8c7d9;
  --text-muted: #7d8fa3;
  --text-light: #f0f6ff;
  --glass-bg: rgba(255,255,255,0.06);
  --glass-bg-hover: rgba(255,255,255,0.10);
  --glass-border: rgba(255,255,255,0.12);
  --glass-border-hover: rgba(255,255,255,0.22);
  --radius-card: 18px;
  --radius-btn: 50px;
  --radius-tag: 10px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.35);
  --shadow-glow: 0 0 20px rgba(56,189,248,0.6);
  --shadow-glow-lg: 0 0 32px rgba(56,189,248,0.8);
  --font-stack: "PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  --section-pad-desktop: 88px;
  --section-pad-tablet: 64px;
  --section-pad-mobile: 48px;
  --transition: all .3s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-stack);
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-body);
  background: var(--bg-primary);
  overflow-x: hidden;
}

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

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

a:hover {
  color: var(--neon-cyan);
}

button,
input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
}

.container {
  max-width: 1200px;
}

/* ===== Header ===== */
.site-header {
  background: rgba(10,22,40,0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  position: sticky;
  top: 0;
  z-index: 1030;
  padding: 0;
}

.navbar-brand {
  color: var(--text-title) !important;
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: .5px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 0;
}

.navbar-brand .logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--accent-blue), var(--neon-cyan));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: #fff;
  box-shadow: 0 0 16px rgba(30,144,255,0.5);
  flex-shrink: 0;
}

.navbar-brand span {
  color: var(--text-title);
}

.navbar {
  padding: 0;
}

.navbar-nav .nav-link {
  color: var(--text-body) !important;
  font-size: .95rem;
  font-weight: 500;
  padding: 18px 16px !important;
  position: relative;
  transition: var(--transition);
}

.navbar-nav .nav-link::after {
  content: '';
  position: absolute;
  bottom: 10px;
  left: 16px;
  right: 16px;
  height: 2px;
  background: var(--neon-cyan);
  border-radius: 2px;
  transform: scaleX(0);
  transition: transform .3s ease;
  box-shadow: 0 0 8px rgba(0,212,255,0.6);
}

.navbar-nav .nav-link:hover {
  color: var(--text-title) !important;
}

.navbar-nav .nav-link:hover::after {
  transform: scaleX(1);
}

.navbar-nav .nav-link.active {
  color: var(--neon-cyan) !important;
  font-weight: 600;
}

.navbar-nav .nav-link.active::after {
  transform: scaleX(1);
}

.navbar-toggler {
  border: 1px solid rgba(255,255,255,0.2) !important;
  border-radius: 10px;
  padding: 8px 12px;
  background: rgba(255,255,255,0.06);
  transition: var(--transition);
}

.navbar-toggler:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.3) !important;
}

.navbar-toggler:focus {
  box-shadow: 0 0 0 3px rgba(56,189,248,0.4) !important;
  border-color: var(--glow-blue) !important;
}

.navbar-toggler-icon {
  filter: invert(0.8);
}

/* ===== Hero ===== */
.hero-section {
  position: relative;
  min-height: 680px;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: var(--section-pad-desktop) 0;
  isolation: isolate;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,22,40,0.92) 0%, rgba(13,27,42,0.78) 45%, rgba(16,42,67,0.65) 100%);
  z-index: 1;
}

.hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(30,144,255,0.18) 0%, transparent 60%),
              radial-gradient(ellipse at 75% 30%, rgba(0,212,255,0.12) 0%, transparent 55%);
  z-index: 2;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, rgba(10,22,40,0.55) 0%, rgba(10,22,40,0.72) 100%);
}

.hero-content {
  position: relative;
  z-index: 3;
  padding: 40px 0;
}

.hero-badge {
  display: inline-block;
  background: rgba(56,189,248,0.15);
  border: 1px solid rgba(56,189,248,0.35);
  color: var(--neon-cyan);
  font-size: .82rem;
  font-weight: 600;
  padding: 7px 18px;
  border-radius: 30px;
  letter-spacing: 1px;
  margin-bottom: 22px;
  backdrop-filter: blur(8px);
}

.hero-title {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.25;
  margin-bottom: 22px;
  letter-spacing: .3px;
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--glow-blue), var(--neon-cyan));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: none;
}

.hero-description {
  font-size: 1.07rem;
  line-height: 1.9;
  color: var(--text-body);
  max-width: 620px;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  margin-bottom: 36px;
}

.btn-primary-glow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, #1e90ff, #00b8d4);
  color: #fff !important;
  font-weight: 600;
  font-size: 1rem;
  padding: 14px 32px;
  border-radius: var(--radius-btn);
  border: none;
  box-shadow: 0 0 22px rgba(56,189,248,0.55);
  transition: var(--transition);
  text-decoration: none;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn-primary-glow:hover {
  box-shadow: 0 0 36px rgba(56,189,248,0.85);
  transform: translateY(-2px);
  color: #fff !important;
}

.btn-primary-glow:active {
  transform: translateY(1px);
  box-shadow: 0 0 16px rgba(56,189,248,0.45);
}

.btn-primary-glow:focus-visible {
  outline: 3px solid var(--neon-cyan);
  outline-offset: 3px;
}

.btn-glass {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,0.08);
  color: var(--text-title) !important;
  font-weight: 600;
  font-size: 1rem;
  padding: 14px 32px;
  border-radius: var(--radius-btn);
  border: 1px solid rgba(255,255,255,0.22);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-glass:hover {
  background: rgba(255,255,255,0.15);
  border-color: rgba(255,255,255,0.4);
  color: var(--text-light) !important;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

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

.btn-glass:focus-visible {
  outline: 3px solid var(--glow-blue);
  outline-offset: 3px;
}

.hero-play-btn {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(255,255,255,0.10);
  border: 2px solid rgba(255,255,255,0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 0 24px rgba(0,212,255,0.4);
  backdrop-filter: blur(10px);
  flex-shrink: 0;
}

.hero-play-btn:hover {
  background: rgba(0,212,255,0.22);
  border-color: var(--neon-cyan);
  box-shadow: 0 0 36px rgba(0,212,255,0.7);
  transform: scale(1.06);
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 36px;
  margin-top: 8px;
}

.hero-stat {
  text-align: left;
}

.hero-stat .stat-num {
  font-size: 2rem;
  font-weight: 700;
  color: var(--neon-cyan);
  line-height: 1.2;
  text-shadow: 0 0 18px rgba(0,212,255,0.5);
}

.hero-stat .stat-label {
  font-size: .85rem;
  color: var(--text-muted);
}

/* ===== Pill Nav ===== */
.pill-nav-section {
  background: var(--bg-secondary);
  border-bottom: 1px solid rgba(255,255,255,0.07);
  padding: 18px 0;
  position: relative;
  z-index: 100;
}

.pill-scroll {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding: 4px 2px;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.pill-scroll::-webkit-scrollbar {
  display: none;
}

.pill-item {
  flex-shrink: 0;
  padding: 9px 22px;
  border-radius: 50px;
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.05);
  color: var(--text-body);
  font-size: .88rem;
  font-weight: 500;
  transition: var(--transition);
  white-space: nowrap;
  text-decoration: none;
}

.pill-item:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.35);
  color: var(--text-title);
}

.pill-item.active {
  background: linear-gradient(135deg, rgba(30,144,255,0.35), rgba(0,212,255,0.25));
  border-color: rgba(56,189,248,0.7);
  color: var(--text-light);
  font-weight: 600;
  box-shadow: 0 0 18px rgba(56,189,248,0.4);
}

/* ===== Section通用 ===== */
.section-block {
  padding: var(--section-pad-desktop) 0;
  position: relative;
}

.section-block.bg-alt {
  background: var(--bg-secondary);
}

.section-block.bg-tertiary {
  background: var(--bg-tertiary);
}

.section-label {
  display: inline-block;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: 1.6px;
  color: var(--neon-cyan);
  text-transform: uppercase;
  margin-bottom: 14px;
  padding: 6px 16px;
  border: 1px solid rgba(0,212,255,0.3);
  border-radius: 30px;
  background: rgba(0,212,255,0.06);
}

.section-title {
  font-size: clamp(1.5rem, 2.5vw, 2.2rem);
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.35;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text-body);
  max-width: 760px;
  margin-bottom: 40px;
}

.section-desc.text-center {
  margin-left: auto;
  margin-right: auto;
}

/* ===== Glass Card ===== */
.glass-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  padding: 28px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  height: 100%;
}

.glass-card:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.42);
}

.glass-card .card-icon {
  width: 50px;
  height: 50px;
  border-radius: 14px;
  background: rgba(56,189,248,0.15);
  border: 1px solid rgba(56,189,248,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--neon-cyan);
  margin-bottom: 18px;
  transition: var(--transition);
}

.glass-card:hover .card-icon {
  background: rgba(56,189,248,0.25);
  box-shadow: 0 0 18px rgba(56,189,248,0.35);
}

.glass-card .card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-title);
  margin-bottom: 10px;
}

.glass-card .card-text {
  font-size: .93rem;
  line-height: 1.8;
  color: var(--text-body);
  margin-bottom: 0;
}

/* ===== 痛点卡片 ===== */
.pain-point-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-card);
  padding: 26px 24px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: var(--transition);
  height: 100%;
}

.pain-point-card:hover {
  background: rgba(255,255,255,0.09);
  border-color: rgba(255,255,255,0.18);
  transform: translateY(-3px);
}

.pain-point-card .pain-icon {
  font-size: 1.6rem;
  color: var(--glow-blue);
  margin-bottom: 14px;
  display: block;
}

.pain-point-card .pain-title {
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text-title);
  margin-bottom: 8px;
}

.pain-point-card .pain-text {
  font-size: .88rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 0;
}

/* ===== 解决方案 ===== */
.solution-media {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: var(--shadow-card);
  height: 100%;
}

.solution-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 280px;
}

/* ===== 步骤 ===== */
.step-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  position: relative;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: var(--transition);
  height: 100%;
}

.step-card:hover {
  background: rgba(255,255,255,0.09);
  border-color: rgba(255,255,255,0.18);
  transform: translateY(-3px);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-blue), var(--neon-cyan));
  color: #fff;
  font-weight: 700;
  font-size: 1.15rem;
  margin-bottom: 16px;
  box-shadow: 0 0 18px rgba(56,189,248,0.5);
  flex-shrink: 0;
}

.step-card .step-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-title);
  margin-bottom: 8px;
}

.step-card .step-text {
  font-size: .9rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 0;
}

/* ===== 数据指标 ===== */
.data-card {
  text-align: center;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-card);
  padding: 32px 20px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: var(--transition);
  height: 100%;
}

.data-card:hover {
  background: rgba(255,255,255,0.09);
  border-color: rgba(56,189,248,0.4);
  box-shadow: 0 0 22px rgba(56,189,248,0.25);
  transform: translateY(-3px);
}

.data-card .data-num {
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--neon-cyan);
  line-height: 1.2;
  text-shadow: 0 0 22px rgba(0,212,255,0.55);
  margin-bottom: 6px;
}

.data-card .data-unit {
  font-size: 1rem;
  color: var(--glow-blue);
  font-weight: 500;
}

.data-card .data-label {
  font-size: .88rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ===== 证言卡片 ===== */
.testimonial-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: var(--transition);
  height: 100%;
}

.testimonial-card:hover {
  background: rgba(255,255,255,0.09);
  border-color: rgba(255,255,255,0.2);
  transform: translateY(-3px);
}

.testimonial-card .avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(30,144,255,0.3), rgba(0,212,255,0.3));
  border: 2px solid rgba(56,189,248,0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neon-cyan);
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 14px;
}

.testimonial-card .quote {
  font-size: .92rem;
  line-height: 1.8;
  color: var(--text-body);
  margin-bottom: 16px;
}

.testimonial-card .person {
  font-size: .9rem;
  font-weight: 600;
  color: var(--text-title);
}

.testimonial-card .person-role {
  font-size: .8rem;
  color: var(--text-muted);
}

.testimonial-card .stars {
  color: #ffc107;
  font-size: .85rem;
  letter-spacing: 2px;
  margin-bottom: 10px;
}

/* ===== 资讯卡片 ===== */
.news-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.news-card:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(56,189,248,0.35);
  transform: translateY(-4px);
  box-shadow: 0 12px 36px rgba(0,0,0,0.4);
}

.news-card .news-img {
  height: 180px;
  overflow: hidden;
  position: relative;
}

.news-card .news-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}

.news-card:hover .news-img img {
  transform: scale(1.06);
}

.news-card .news-body {
  padding: 20px 22px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.news-card .news-tag {
  display: inline-block;
  background: rgba(0,212,255,0.12);
  border: 1px solid rgba(0,212,255,0.3);
  color: var(--neon-cyan);
  font-size: .72rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 10px;
  align-self: flex-start;
}

.news-card .news-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-title);
  margin-bottom: 8px;
  line-height: 1.5;
}

.news-card .news-excerpt {
  font-size: .85rem;
  color: var(--text-muted);
  line-height: 1.75;
  flex-grow: 1;
  margin-bottom: 12px;
}

.news-card .news-meta {
  font-size: .78rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.news-card .news-link {
  font-size: .85rem;
  font-weight: 600;
  color: var(--glow-blue);
  transition: var(--transition);
}

.news-card .news-link:hover {
  color: var(--neon-cyan);
}

.news-empty {
  background: rgba(255,255,255,0.04);
  border: 1px dashed rgba(255,255,255,0.18);
  border-radius: var(--radius-card);
  padding: 50px 30px;
  text-align: center;
  color: var(--text-muted);
  font-size: .95rem;
}

/* ===== 专题入口 ===== */
.topic-card {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: var(--shadow-card);
  height: 100%;
  transition: var(--transition);
}

.topic-card:hover {
  border-color: rgba(56,189,248,0.5);
  transform: translateY(-4px);
  box-shadow: 0 14px 42px rgba(0,0,0,0.45);
}

.topic-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform .5s ease;
}

.topic-card:hover img {
  transform: scale(1.06);
}

.topic-card .topic-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10,22,40,0.1) 0%, rgba(10,22,40,0.85) 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px;
}

.topic-card .topic-tag {
  font-size: .75rem;
  font-weight: 600;
  color: var(--neon-cyan);
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.topic-card .topic-title {
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--text-light);
  margin-bottom: 6px;
}

.topic-card .topic-arrow {
  font-size: 1.1rem;
  color: var(--glow-blue);
  transition: var(--transition);
}

.topic-card:hover .topic-arrow {
  color: var(--neon-cyan);
  transform: translateX(5px);
}

/* ===== FAQ ===== */
.accordion-item {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 14px !important;
  margin-bottom: 14px;
  overflow: hidden;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: var(--transition);
}

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

.accordion-item:hover {
  border-color: rgba(56,189,248,0.35);
}

.accordion-button {
  background: transparent !important;
  color: var(--text-title) !important;
  font-size: .98rem;
  font-weight: 600;
  padding: 18px 22px;
  box-shadow: none !important;
  transition: var(--transition);
}

.accordion-button::after {
  filter: invert(0.75);
}

.accordion-button:not(.collapsed) {
  background: rgba(56,189,248,0.1) !important;
  color: var(--neon-cyan) !important;
}

.accordion-button:focus {
  box-shadow: 0 0 0 3px rgba(56,189,248,0.35) !important;
  border-color: var(--glow-blue) !important;
}

.accordion-body {
  background: transparent;
  color: var(--text-body);
  font-size: .9rem;
  line-height: 1.85;
  padding: 0 22px 18px;
}

/* ===== 保障徽章 ===== */
.badge-card {
  text-align: center;
  padding: 26px 18px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-card);
  transition: var(--transition);
  height: 100%;
}

.badge-card:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(56,189,248,0.3);
  transform: translateY(-3px);
}

.badge-card .badge-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(56,189,248,0.13);
  border: 2px solid rgba(56,189,248,0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--neon-cyan);
  margin: 0 auto 14px;
  box-shadow: 0 0 16px rgba(56,189,248,0.25);
}

.badge-card .badge-title {
  font-size: .98rem;
  font-weight: 600;
  color: var(--text-title);
  margin-bottom: 6px;
}

.badge-card .badge-text {
  font-size: .82rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 0;
}

/* ===== CTA Section ===== */
.cta-section {
  background: linear-gradient(135deg, #0d1b2a 0%, #102a43 55%, #0a1628 100%);
  border-top: 1px solid rgba(56,189,248,0.2);
  border-bottom: 1px solid rgba(56,189,248,0.15);
  padding: var(--section-pad-desktop) 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(56,189,248,0.15) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section .cta-title {
  font-size: clamp(1.5rem, 2.4vw, 2rem);
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 16px;
}

.cta-section .cta-text {
  font-size: 1rem;
  color: var(--text-body);
  max-width: 600px;
  margin: 0 auto 28px;
  line-height: 1.85;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-primary);
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 56px 0 30px;
}

.footer-brand {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-title);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-brand .footer-logo-icon {
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, var(--accent-blue), var(--neon-cyan));
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: .9rem;
}

.footer-desc {
  font-size: .88rem;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 380px;
}

.footer-title {
  font-size: .95rem;
  font-weight: 600;
  color: var(--text-title);
  margin-bottom: 16px;
  letter-spacing: .5px;
}

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

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

.footer-links a {
  color: var(--text-muted);
  font-size: .88rem;
  transition: var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.07);
  padding-top: 22px;
  margin-top: 36px;
}

.copyright {
  font-size: .82rem;
  color: var(--text-muted);
}

/* ===== 响应式 ===== */
@media (max-width: 991.98px) {
  .section-block {
    padding: var(--section-pad-tablet) 0;
  }
  .cta-section {
    padding: var(--section-pad-tablet) 0;
  }
  .hero-section {
    min-height: auto;
    padding: var(--section-pad-tablet) 0;
  }
  .hero-title {
    font-size: 1.8rem;
  }
  .navbar-nav {
    padding: 12px 16px;
    background: rgba(10,22,40,0.98);
    border-radius: 0 0 16px 16px;
    border: 1px solid rgba(255,255,255,0.1);
    margin-top: 8px;
  }
  .navbar-nav .nav-link {
    padding: 14px 12px !important;
  }
  .navbar-nav .nav-link::after {
    bottom: 6px;
    left: 12px;
    right: 12px;
  }
}

@media (max-width: 767.98px) {
  .section-block {
    padding: var(--section-pad-mobile) 0;
  }
  .cta-section {
    padding: var(--section-pad-mobile) 0;
  }
  .hero-section {
    padding: var(--section-pad-mobile) 0;
  }
  .hero-title {
    font-size: 1.5rem;
  }
  .hero-description {
    font-size: .95rem;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }
  .hero-stats {
    gap: 20px;
  }
  .hero-stat .stat-num {
    font-size: 1.5rem;
  }
  .news-card .news-img {
    height: 150px;
  }
  .topic-card img {
    height: 170px;
  }
  .glass-card {
    padding: 22px;
  }
  .step-card {
    padding: 22px 18px;
  }
  .data-card .data-num {
    font-size: 2rem;
  }
}

@media (max-width: 575.98px) {
  .hero-title {
    font-size: 1.3rem;
  }
  .hero-description {
    font-size: .88rem;
  }
  .section-title {
    font-size: 1.35rem;
  }
  .pill-item {
    padding: 7px 16px;
    font-size: .8rem;
  }
  .hero-play-btn {
    width: 52px;
    height: 52px;
    font-size: 1.2rem;
  }
  .news-card .news-img {
    height: 130px;
  }
  .topic-card img {
    height: 150px;
  }
}

/* ===== 辅助工具 ===== */
.mb-40 {
  margin-bottom: 40px;
}
.mt-40 {
  margin-top: 40px;
}
.text-glow {
  text-shadow: 0 0 18px rgba(56,189,248,0.45);
}
.divider-glow {
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-blue), var(--neon-cyan));
  border-radius: 3px;
  margin: 14px auto 0;
  box-shadow: 0 0 12px rgba(56,189,248,0.5);
}

/* roulang page: category1 */
:root {
    --bg-primary: #0a1628;
    --bg-secondary: #0d1b2a;
    --bg-tertiary: #102a43;
    --accent-blue: #1e90ff;
    --glow-blue: #38bdf8;
    --neon-cyan: #00d4ff;
    --text-title: #e6f1ff;
    --text-body: #b8c7d9;
    --text-muted: #7d8fa3;
    --text-light: #f0f6ff;
    --glass-bg: rgba(255,255,255,0.06);
    --glass-bg-hover: rgba(255,255,255,0.10);
    --glass-border: rgba(255,255,255,0.12);
    --glass-border-hover: rgba(255,255,255,0.22);
    --radius-card: 18px;
    --radius-btn: 50px;
    --radius-tag: 10px;
    --shadow-card: 0 8px 32px rgba(0,0,0,0.35);
    --shadow-glow: 0 0 20px rgba(56,189,248,0.6);
    --shadow-glow-lg: 0 0 32px rgba(56,189,248,0.8);
    --font-stack: "PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
    --section-pad-desktop: 88px;
    --section-pad-tablet: 64px;
    --section-pad-mobile: 48px;
    --transition: all .3s ease;
  }
  html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }
  body {
    font-family: var(--font-stack);
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-body);
    background: var(--bg-primary);
    overflow-x: hidden;
  }
  img {
    max-width: 100%;
    height: auto;
    display: block;
  }
  a {
    color: var(--glow-blue);
    text-decoration: none;
    transition: var(--transition);
  }
  a:hover {
    color: var(--neon-cyan);
  }
  button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
  }
  .container {
    max-width: 1200px;
  }

  /* ===== Header ===== */
  .site-header {
    background: rgba(10,22,40,0.92);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(255,255,255,0.08);
    position: sticky;
    top: 0;
    z-index: 1030;
    padding: 0;
  }
  .navbar-brand {
    color: var(--text-title) !important;
    font-weight: 700;
    font-size: 1.35rem;
    letter-spacing: .5px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 0;
  }
  .navbar-brand .logo-icon {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, var(--accent-blue), var(--neon-cyan));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: #fff;
    box-shadow: 0 0 16px rgba(30,144,255,0.5);
    flex-shrink: 0;
  }
  .navbar-brand span {
    color: var(--text-title);
  }
  .navbar {
    padding: 0;
  }
  .navbar-nav .nav-link {
    color: var(--text-body) !important;
    font-size: .95rem;
    font-weight: 500;
    padding: 18px 16px !important;
    position: relative;
    transition: var(--transition);
  }
  .navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: 10px;
    left: 16px;
    right: 16px;
    height: 2px;
    background: var(--neon-cyan);
    border-radius: 2px;
    transform: scaleX(0);
    transition: transform .3s ease;
    box-shadow: 0 0 8px rgba(0,212,255,0.6);
  }
  .navbar-nav .nav-link:hover {
    color: var(--text-title) !important;
  }
  .navbar-nav .nav-link:hover::after {
    transform: scaleX(1);
  }
  .navbar-nav .nav-link.active {
    color: var(--neon-cyan) !important;
    font-weight: 600;
  }
  .navbar-nav .nav-link.active::after {
    transform: scaleX(1);
  }
  .navbar-toggler {
    border: 1px solid rgba(255,255,255,0.2) !important;
    border-radius: 10px;
    padding: 8px 12px;
    background: rgba(255,255,255,0.06);
    transition: var(--transition);
  }
  .navbar-toggler:hover {
    background: rgba(255,255,255,0.12);
    border-color: rgba(255,255,255,0.3) !important;
  }
  .navbar-toggler:focus {
    box-shadow: 0 0 0 3px rgba(56,189,248,0.4) !important;
    border-color: var(--glow-blue) !important;
  }
  .navbar-toggler-icon {
    filter: invert(0.8);
  }

  /* ===== Section base ===== */
  .section-block {
    padding: var(--section-pad-desktop) 0;
    position: relative;
  }
  .section-block.bg-alt {
    background: var(--bg-secondary);
  }
  .section-block.bg-tertiary {
    background: var(--bg-tertiary);
  }
  .section-label {
    display: inline-block;
    font-size: .8rem;
    font-weight: 600;
    color: var(--neon-cyan);
    letter-spacing: 1.5px;
    margin-bottom: 14px;
    text-transform: uppercase;
  }
  .section-title {
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    font-weight: 700;
    color: var(--text-title);
    line-height: 1.35;
    margin-bottom: 18px;
  }
  .section-desc {
    font-size: 1rem;
    color: var(--text-body);
    max-width: 720px;
    line-height: 1.9;
  }

  /* ===== Buttons ===== */
  .btn-primary-glow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(135deg, #1e90ff, #00b8d4);
    color: #fff !important;
    font-weight: 600;
    font-size: 1rem;
    padding: 14px 32px;
    border-radius: var(--radius-btn);
    border: none;
    box-shadow: 0 0 22px rgba(56,189,248,0.55);
    transition: var(--transition);
    text-decoration: none;
    position: relative;
    overflow: hidden;
    white-space: nowrap;
  }
  .btn-primary-glow:hover {
    box-shadow: 0 0 36px rgba(56,189,248,0.85);
    transform: translateY(-2px);
    color: #fff !important;
  }
  .btn-primary-glow:active {
    transform: translateY(1px);
    box-shadow: 0 0 18px rgba(56,189,248,0.4);
  }
  .btn-primary-glow:focus-visible {
    outline: 3px solid rgba(56,189,248,0.55);
    outline-offset: 3px;
  }
  .btn-glass {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--glass-bg);
    color: var(--text-light) !important;
    font-weight: 500;
    font-size: 1rem;
    padding: 14px 30px;
    border-radius: var(--radius-btn);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
  }
  .btn-glass:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    color: #fff !important;
    transform: translateY(-2px);
  }
  .btn-glass:focus-visible {
    outline: 3px solid rgba(56,189,248,0.4);
    outline-offset: 3px;
  }
  .btn-outline-glow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--glow-blue) !important;
    font-weight: 500;
    font-size: .95rem;
    padding: 10px 24px;
    border-radius: var(--radius-btn);
    border: 1px solid rgba(56,189,248,0.45);
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
  }
  .btn-outline-glow:hover {
    background: rgba(56,189,248,0.12);
    border-color: var(--neon-cyan);
    color: var(--neon-cyan) !important;
    box-shadow: 0 0 14px rgba(56,189,248,0.35);
  }

  /* ===== Glass card ===== */
  .glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    transition: var(--transition);
    height: 100%;
    overflow: hidden;
  }
  .glass-card:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    transform: translateY(-4px);
    box-shadow: 0 14px 40px rgba(0,0,0,0.45), 0 0 22px rgba(56,189,248,0.25);
  }
  .glass-card:focus-within {
    outline: 2px solid rgba(56,189,248,0.5);
    outline-offset: 2px;
  }

  /* ===== Hero / Category H1 ===== */
  .category-hero {
    position: relative;
    padding: var(--section-pad-desktop) 0 72px;
    overflow: hidden;
    isolation: isolate;
  }
  .category-hero .hero-bg {
    position: absolute;
    inset: 0;
    z-index: -2;
  }
  .category-hero .hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
  }
  .category-hero .hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(10,22,40,0.93) 0%, rgba(13,27,42,0.82) 50%, rgba(16,42,67,0.7) 100%);
    z-index: 1;
  }
  .category-hero .hero-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 20% 40%, rgba(30,144,255,0.16) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 30%, rgba(0,212,255,0.1) 0%, transparent 55%);
    z-index: 2;
  }
  .category-hero .hero-overlay {
    position: absolute;
    inset: 0;
    z-index: -1;
    background: linear-gradient(180deg, rgba(10,22,40,0.45) 0%, rgba(10,22,40,0.65) 100%);
  }
  .category-hero-content {
    position: relative;
    z-index: 3;
    padding: 30px 0;
  }
  .breadcrumb-cst {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: .88rem;
    color: var(--text-muted);
    margin-bottom: 24px;
  }
  .breadcrumb-cst a {
    color: var(--text-muted);
  }
  .breadcrumb-cst a:hover {
    color: var(--neon-cyan);
  }
  .breadcrumb-cst .sep {
    color: rgba(125,143,163,0.5);
  }
  .breadcrumb-cst .current {
    color: var(--neon-cyan);
    font-weight: 500;
  }
  .category-hero-badge {
    display: inline-block;
    background: rgba(56,189,248,0.15);
    border: 1px solid rgba(56,189,248,0.35);
    color: var(--neon-cyan);
    font-size: .82rem;
    font-weight: 600;
    padding: 7px 18px;
    border-radius: 30px;
    letter-spacing: 1px;
    margin-bottom: 20px;
    backdrop-filter: blur(8px);
  }
  .category-hero-title {
    font-size: clamp(2rem, 4.5vw, 3.1rem);
    font-weight: 700;
    color: var(--text-title);
    line-height: 1.25;
    margin-bottom: 20px;
    letter-spacing: .3px;
  }
  .category-hero-title .highlight {
    background: linear-gradient(135deg, var(--glow-blue), var(--neon-cyan));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }
  .category-hero-desc {
    font-size: 1.07rem;
    line-height: 1.9;
    color: var(--text-body);
    max-width: 680px;
    margin-bottom: 28px;
  }
  .category-hero-metrics {
    display: flex;
    flex-wrap: wrap;
    gap: 28px;
    align-items: center;
    margin-top: 12px;
  }
  .hero-metric {
    display: flex;
    flex-direction: column;
  }
  .hero-metric .metric-value {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-title);
    line-height: 1.2;
  }
  .hero-metric .metric-label {
    font-size: .85rem;
    color: var(--text-muted);
  }
  .metric-divider {
    width: 1px;
    height: 42px;
    background: rgba(255,255,255,0.14);
  }

  /* ===== Overview card ===== */
  .overview-card {
    padding: 36px 40px;
    border-radius: 22px;
  }
  .overview-card p {
    margin-bottom: 14px;
    font-size: 1.02rem;
    line-height: 1.95;
    color: var(--text-body);
  }
  .overview-card p:last-child {
    margin-bottom: 0;
  }
  .overview-card .highlight-text {
    color: var(--glow-blue);
    font-weight: 500;
  }

  /* ===== Content list / CMS cards ===== */
  .content-card .content-card-img {
    position: relative;
    height: 200px;
    overflow: hidden;
  }
  .content-card .content-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .5s ease;
  }
  .content-card:hover .content-card-img img {
    transform: scale(1.05);
  }
  .content-card .content-tag {
    position: absolute;
    top: 14px;
    left: 14px;
    background: rgba(10,22,40,0.85);
    backdrop-filter: blur(8px);
    color: var(--neon-cyan);
    font-size: .76rem;
    font-weight: 600;
    padding: 5px 14px;
    border-radius: 20px;
    border: 1px solid rgba(56,189,248,0.4);
  }
  .content-card-body {
    padding: 20px 22px 22px;
  }
  .content-card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-title);
    line-height: 1.5;
    margin-bottom: 10px;
  }
  .content-card-title a {
    color: var(--text-title);
  }
  .content-card-title a:hover {
    color: var(--neon-cyan);
  }
  .content-card-summary {
    font-size: .92rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 14px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .content-card-meta {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: .82rem;
    color: var(--text-muted);
  }
  .content-card-meta span {
    display: inline-flex;
    align-items: center;
    gap: 5px;
  }
  .empty-state {
    text-align: center;
    padding: 60px 20px;
    background: var(--glass-bg);
    border: 1px dashed var(--glass-border);
    border-radius: var(--radius-card);
    color: var(--text-muted);
  }
  .empty-state i {
    font-size: 2.4rem;
    color: rgba(125,143,163,0.5);
    margin-bottom: 16px;
    display: block;
  }
  .empty-state p {
    margin-bottom: 0;
    font-size: 1rem;
  }
  .view-more-wrap {
    margin-top: 36px;
    text-align: center;
  }

  /* ===== Scene cards ===== */
  .scene-card {
    height: 100%;
  }
  .scene-card .scene-card-img {
    height: 180px;
    overflow: hidden;
  }
  .scene-card .scene-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .5s ease;
  }
  .scene-card:hover .scene-card-img img {
    transform: scale(1.05);
  }
  .scene-card-body {
    padding: 22px 24px 26px;
  }
  .scene-card-title {
    font-size: 1.08rem;
    font-weight: 600;
    color: var(--text-title);
    margin-bottom: 10px;
  }
  .scene-card-text {
    font-size: .92rem;
    color: var(--text-muted);
    line-height: 1.75;
    margin-bottom: 0;
  }
  .scene-card .icon-badge {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: rgba(56,189,248,0.15);
    border: 1px solid rgba(56,189,248,0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--neon-cyan);
    font-size: 1.2rem;
    margin-bottom: 16px;
  }

  /* ===== Data metrics ===== */
  .data-band {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: space-between;
  }
  .data-item {
    flex: 1 1 180px;
    min-width: 150px;
    text-align: center;
    padding: 28px 18px;
    background: var(--glass-bg);
    backdrop-filter: blur(14px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-card);
    transition: var(--transition);
  }
  .data-item:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    box-shadow: 0 0 18px rgba(56,189,248,0.22);
  }
  .data-number {
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--text-title);
    line-height: 1.2;
    text-shadow: 0 0 16px rgba(56,189,248,0.5);
    margin-bottom: 6px;
  }
  .data-number .unit {
    font-size: 1rem;
    color: var(--neon-cyan);
    margin-left: 3px;
  }
  .data-label {
    font-size: .88rem;
    color: var(--text-muted);
  }

  /* ===== Guarantee ===== */
  .guarantee-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
  }
  .guarantee-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 24px 26px;
    background: var(--glass-bg);
    backdrop-filter: blur(14px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-card);
    transition: var(--transition);
  }
  .guarantee-item:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    transform: translateY(-3px);
  }
  .guarantee-item .guarantee-icon {
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(30,144,255,0.25), rgba(0,212,255,0.18));
    border: 1px solid rgba(56,189,248,0.35);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--neon-cyan);
    font-size: 1.15rem;
    flex-shrink: 0;
  }
  .guarantee-item h4 {
    font-size: 1.02rem;
    font-weight: 600;
    color: var(--text-title);
    margin-bottom: 6px;
  }
  .guarantee-item p {
    font-size: .9rem;
    color: var(--text-muted);
    margin-bottom: 0;
    line-height: 1.7;
  }

  /* ===== FAQ ===== */
  .faq-accordion .accordion-item {
    background: var(--glass-bg);
    backdrop-filter: blur(14px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-card) !important;
    margin-bottom: 14px;
    overflow: hidden;
    transition: var(--transition);
  }
  .faq-accordion .accordion-item:hover {
    border-color: var(--glass-border-hover);
  }
  .faq-accordion .accordion-button {
    background: transparent;
    color: var(--text-title);
    font-size: 1rem;
    font-weight: 600;
    padding: 20px 24px;
    box-shadow: none;
    border: none;
    gap: 12px;
  }
  .faq-accordion .accordion-button:not(.collapsed) {
    background: rgba(56,189,248,0.08);
    color: var(--neon-cyan);
  }
  .faq-accordion .accordion-button:focus {
    box-shadow: 0 0 0 3px rgba(56,189,248,0.3);
  }
  .faq-accordion .accordion-button::after {
    filter: invert(0.7);
  }
  .faq-accordion .accordion-body {
    background: transparent;
    color: var(--text-body);
    font-size: .95rem;
    line-height: 1.85;
    padding: 4px 24px 20px;
  }

  /* ===== CTA ===== */
  .cta-band {
    position: relative;
    padding: 72px 0;
    border-radius: 24px;
    overflow: hidden;
    isolation: isolate;
    border: 1px solid rgba(56,189,248,0.2);
  }
  .cta-band .cta-bg {
    position: absolute;
    inset: 0;
    z-index: -2;
  }
  .cta-band .cta-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
  }
  .cta-band .cta-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(10,22,40,0.9) 0%, rgba(13,27,42,0.78) 100%);
    z-index: 1;
  }
  .cta-band .cta-overlay {
    position: absolute;
    inset: 0;
    z-index: -1;
    background: radial-gradient(ellipse at 30% 50%, rgba(30,144,255,0.16) 0%, transparent 60%),
                radial-gradient(ellipse at 75% 40%, rgba(0,212,255,0.1) 0%, transparent 55%);
  }
  .cta-band-content {
    position: relative;
    z-index: 3;
    text-align: center;
    padding: 20px 30px;
  }
  .cta-band-title {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 700;
    color: var(--text-title);
    margin-bottom: 16px;
  }
  .cta-band-desc {
    font-size: 1rem;
    color: var(--text-body);
    max-width: 560px;
    margin: 0 auto 28px;
    line-height: 1.85;
  }
  .cta-band-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
    align-items: center;
  }

  /* ===== Footer ===== */
  .site-footer {
    background: #091426;
    border-top: 1px solid rgba(255,255,255,0.07);
    padding: 64px 0 0;
    margin-top: 0;
  }
  .footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
  }
  .footer-logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--accent-blue), var(--neon-cyan));
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1rem;
    flex-shrink: 0;
  }
  .footer-brand span {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-title);
  }
  .footer-desc {
    font-size: .9rem;
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 0;
  }
  .footer-title {
    font-size: .95rem;
    font-weight: 600;
    color: var(--text-title);
    margin-bottom: 16px;
    letter-spacing: .5px;
  }
  .footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
  }
  .footer-links li {
    margin-bottom: 10px;
  }
  .footer-links a {
    color: var(--text-muted);
    font-size: .9rem;
    transition: var(--transition);
  }
  .footer-links a:hover {
    color: var(--neon-cyan);
    padding-left: 4px;
  }
  .footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.07);
    padding: 20px 0;
    margin-top: 48px;
    font-size: .84rem;
    color: var(--text-muted);
  }
  .footer-bottom .copyright {
    color: var(--text-muted);
  }

  /* ===== Responsive ===== */
  @media (max-width: 991px) {
    :root {
      --section-pad-desktop: 64px;
      --section-pad-tablet: 56px;
      --section-pad-mobile: 44px;
    }
    .section-block {
      padding: var(--section-pad-tablet) 0;
    }
    .category-hero {
      padding: var(--section-pad-tablet) 0 56px;
    }
    .site-footer {
      padding-top: 48px;
    }
    .footer-bottom {
      margin-top: 36px;
      flex-direction: column;
      gap: 8px;
      text-align: center;
    }
  }
  @media (max-width: 767px) {
    :root {
      --section-pad-mobile: 44px;
    }
    .section-block {
      padding: var(--section-pad-mobile) 0;
    }
    .category-hero {
      padding: var(--section-pad-mobile) 0 40px;
    }
    .category-hero-title {
      font-size: 1.85rem;
    }
    .category-hero-desc {
      font-size: 1rem;
    }
    .category-hero-metrics {
      gap: 16px;
    }
    .hero-metric .metric-value {
      font-size: 1.3rem;
    }
    .metric-divider {
      display: none;
    }
    .overview-card {
      padding: 26px 24px;
    }
    .cta-band-title {
      font-size: 1.5rem;
    }
    .btn-primary-glow,
    .btn-glass {
      width: 100%;
      justify-content: center;
    }
    .cta-band-actions {
      flex-direction: column;
    }
  }
  @media (max-width: 520px) {
    .category-hero-title {
      font-size: 1.6rem;
    }
    .section-title {
      font-size: 1.4rem;
    }
    .data-number {
      font-size: 2rem;
    }
    .content-card .content-card-img {
      height: 180px;
    }
  }

/* roulang page: article */
:root {
  --bg-primary: #0a1628;
  --bg-secondary: #0d1b2a;
  --bg-tertiary: #102a43;
  --accent-blue: #1e90ff;
  --glow-blue: #38bdf8;
  --neon-cyan: #00d4ff;
  --text-title: #e6f1ff;
  --text-body: #b8c7d9;
  --text-muted: #7d8fa3;
  --text-light: #f0f6ff;
  --glass-bg: rgba(255,255,255,0.06);
  --glass-bg-hover: rgba(255,255,255,0.10);
  --glass-border: rgba(255,255,255,0.12);
  --glass-border-hover: rgba(255,255,255,0.22);
  --radius-card: 18px;
  --radius-btn: 50px;
  --radius-tag: 10px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.35);
  --shadow-glow: 0 0 20px rgba(56,189,248,0.6);
  --shadow-glow-lg: 0 0 32px rgba(56,189,248,0.8);
  --font-stack: "PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  --section-pad-desktop: 88px;
  --section-pad-tablet: 64px;
  --section-pad-mobile: 48px;
  --transition: all .3s ease;
}
html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
body {
  font-family: var(--font-stack);
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-body);
  background: var(--bg-primary);
  overflow-x: hidden;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: var(--glow-blue);
  text-decoration: none;
  transition: var(--transition);
}
a:hover {
  color: var(--neon-cyan);
}
button,
input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
}
.container {
  max-width: 1200px;
}
/* ===== Header ===== */
.site-header {
  background: rgba(10,22,40,0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  position: sticky;
  top: 0;
  z-index: 1030;
  padding: 0;
}
.navbar-brand {
  color: var(--text-title) !important;
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: .5px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 0;
}
.navbar-brand .logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--accent-blue), var(--neon-cyan));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: #fff;
  box-shadow: 0 0 16px rgba(30,144,255,0.5);
  flex-shrink: 0;
}
.navbar-brand span {
  color: var(--text-title);
}
.navbar {
  padding: 0;
}
.navbar-nav .nav-link {
  color: var(--text-body) !important;
  font-size: .95rem;
  font-weight: 500;
  padding: 18px 16px !important;
  position: relative;
  transition: var(--transition);
}
.navbar-nav .nav-link::after {
  content: '';
  position: absolute;
  bottom: 10px;
  left: 16px;
  right: 16px;
  height: 2px;
  background: var(--neon-cyan);
  border-radius: 2px;
  transform: scaleX(0);
  transition: transform .3s ease;
  box-shadow: 0 0 8px rgba(0,212,255,0.6);
}
.navbar-nav .nav-link:hover {
  color: var(--text-title) !important;
}
.navbar-nav .nav-link:hover::after {
  transform: scaleX(1);
}
.navbar-nav .nav-link.active {
  color: var(--neon-cyan) !important;
  font-weight: 600;
}
.navbar-nav .nav-link.active::after {
  transform: scaleX(1);
}
.navbar-toggler {
  border: 1px solid rgba(255,255,255,0.2) !important;
  border-radius: 10px;
  padding: 8px 12px;
  background: rgba(255,255,255,0.06);
  transition: var(--transition);
}
.navbar-toggler:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.3) !important;
}
.navbar-toggler:focus {
  box-shadow: 0 0 0 3px rgba(56,189,248,0.4) !important;
  border-color: var(--glow-blue) !important;
}
.navbar-toggler-icon {
  filter: invert(0.8);
}
/* ===== Article Hero ===== */
.article-hero-section {
  position: relative;
  min-height: 420px;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 72px 0 56px;
  isolation: isolate;
}
.article-hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
}
.article-hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.article-hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(10,22,40,0.95) 0%, rgba(13,27,42,0.80) 50%, rgba(16,42,67,0.68) 100%);
  z-index: 1;
}
.article-hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 25% 40%, rgba(30,144,255,0.20) 0%, transparent 55%),
              radial-gradient(ellipse at 80% 25%, rgba(0,212,255,0.12) 0%, transparent 50%);
  z-index: 2;
}
.article-hero-content {
  position: relative;
  z-index: 3;
  max-width: 860px;
}
.article-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(56,189,248,0.14);
  border: 1px solid rgba(56,189,248,0.32);
  color: var(--neon-cyan);
  font-size: .82rem;
  font-weight: 600;
  padding: 7px 18px;
  border-radius: 30px;
  letter-spacing: 1px;
  margin-bottom: 20px;
  backdrop-filter: blur(8px);
}
.article-hero-title {
  font-size: clamp(1.7rem, 3.8vw, 2.6rem);
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.35;
  margin-bottom: 20px;
  letter-spacing: .3px;
}
.article-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
}
.article-hero-meta .meta-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--text-body);
  font-size: .92rem;
  padding: 6px 16px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: 30px;
  backdrop-filter: blur(8px);
}
.article-hero-meta .meta-item i {
  color: var(--glow-blue);
}
/* ===== Breadcrumb ===== */
.breadcrumb-section {
  padding: 22px 0;
  background: rgba(13,27,42,0.65);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.breadcrumb-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: .9rem;
  color: var(--text-muted);
}
.breadcrumb-nav a {
  color: var(--text-body);
}
.breadcrumb-nav a:hover {
  color: var(--neon-cyan);
}
.breadcrumb-divider {
  color: var(--text-muted);
  font-size: .72rem;
  opacity: .7;
}
.breadcrumb-current {
  color: var(--text-body);
}
.breadcrumb-last {
  color: var(--glow-blue);
  max-width: 420px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 500;
}
/* ===== Article Content ===== */
.article-content-section {
  padding: var(--section-pad-desktop) 0;
  background: var(--bg-primary);
}
.article-content-layout {
  max-width: 860px;
  margin: 0 auto;
}
.article-main-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-card);
  padding: 48px 56px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
  position: relative;
}
.article-main-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-card);
  background: linear-gradient(135deg, rgba(56,189,248,0.04) 0%, transparent 45%);
  pointer-events: none;
}
.article-rich-content {
  position: relative;
  z-index: 1;
  color: var(--text-body);
  font-size: 1.02rem;
  line-height: 2.0;
  word-break: break-word;
}
.article-rich-content h2,
.article-rich-content h3,
.article-rich-content h4 {
  color: var(--text-title);
  font-weight: 700;
  margin-top: 1.8em;
  margin-bottom: .8em;
  line-height: 1.4;
  letter-spacing: .3px;
}
.article-rich-content h2 {
  font-size: 1.55rem;
  padding-left: 14px;
  border-left: 4px solid var(--glow-blue);
}
.article-rich-content h3 {
  font-size: 1.28rem;
}
.article-rich-content h4 {
  font-size: 1.12rem;
}
.article-rich-content p {
  margin-bottom: 1.15em;
  color: var(--text-body);
}
.article-rich-content ul,
.article-rich-content ol {
  margin: 1em 0 1.4em;
  padding-left: 1.6em;
}
.article-rich-content li {
  margin-bottom: .55em;
  color: var(--text-body);
}
.article-rich-content li::marker {
  color: var(--glow-blue);
}
.article-rich-content blockquote {
  margin: 1.8em 0;
  padding: 18px 24px;
  background: rgba(56,189,248,0.07);
  border-left: 4px solid var(--neon-cyan);
  border-radius: 0 12px 12px 0;
  color: var(--text-light);
  font-style: normal;
  font-size: 1rem;
  line-height: 1.9;
}
.article-rich-content img {
  border-radius: 14px;
  margin: 1.6em 0;
  box-shadow: var(--shadow-card);
  max-width: 100%;
}
.article-rich-content a {
  color: var(--glow-blue);
  border-bottom: 1px dashed rgba(56,189,248,0.45);
}
.article-rich-content a:hover {
  color: var(--neon-cyan);
  border-bottom-color: var(--neon-cyan);
}
.article-rich-content > *:first-child {
  margin-top: 0;
}
.article-rich-content > *:last-child {
  margin-bottom: 0;
}
.article-empty-state {
  text-align: center;
  padding: 60px 24px;
  position: relative;
  z-index: 1;
}
.article-empty-state .empty-icon {
  font-size: 3rem;
  color: var(--glow-blue);
  margin-bottom: 18px;
  opacity: .8;
}
.article-empty-state h2 {
  color: var(--text-title);
  font-weight: 700;
  font-size: 1.5rem;
  margin-bottom: 10px;
}
.article-empty-state p {
  color: var(--text-muted);
  margin-bottom: 24px;
}
/* ===== Buttons ===== */
.btn-primary-glow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, #1e90ff, #00b8d4);
  color: #fff !important;
  font-weight: 600;
  font-size: 1rem;
  padding: 14px 32px;
  border-radius: var(--radius-btn);
  border: none;
  box-shadow: 0 0 22px rgba(56,189,248,0.55);
  transition: var(--transition);
  text-decoration: none;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  cursor: pointer;
}
.btn-primary-glow:hover {
  box-shadow: 0 0 36px rgba(56,189,248,0.85);
  transform: translateY(-2px);
  color: #fff !important;
}
.btn-primary-glow:active {
  transform: translateY(0);
  box-shadow: 0 0 16px rgba(56,189,248,0.5);
}
.btn-glass {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.18);
  color: var(--text-title) !important;
  font-weight: 500;
  font-size: 1rem;
  padding: 14px 32px;
  border-radius: var(--radius-btn);
  backdrop-filter: blur(10px);
  transition: var(--transition);
  white-space: nowrap;
}
.btn-glass:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.30);
  color: var(--text-light) !important;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}
/* ===== Article Stats ===== */
.article-stats-section {
  padding: 40px 0;
  background: var(--bg-secondary);
}
.article-stats-panel {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.09);
  border-radius: var(--radius-card);
  padding: 36px 40px;
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-block {
  text-align: center;
  padding: 18px 12px;
  border-radius: 14px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  transition: var(--transition);
}
.stat-block:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(56,189,248,0.25);
  transform: translateY(-2px);
}
.stat-number {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.2;
  text-shadow: 0 0 18px rgba(56,189,248,0.65);
  letter-spacing: .5px;
}
.stat-label {
  font-size: .88rem;
  color: var(--text-muted);
  margin-top: 6px;
}
/* ===== Related ===== */
.related-section {
  padding: var(--section-pad-desktop) 0;
  background: var(--bg-primary);
}
.section-heading {
  margin-bottom: 40px;
}
.section-heading h2 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 10px;
  letter-spacing: .3px;
}
.section-heading p {
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 600px;
  margin: 0;
}
.glass-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-card);
  overflow: hidden;
  backdrop-filter: blur(12px);
  transition: var(--transition);
  box-shadow: var(--shadow-card);
  height: 100%;
}
.glass-card:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(56,189,248,0.28);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.45);
}
.related-card-img {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}
.related-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.related-card:hover .related-card-img img {
  transform: scale(1.05);
}
.card-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(10,22,40,0.85);
  backdrop-filter: blur(8px);
  color: var(--neon-cyan);
  font-size: .75rem;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 20px;
  border: 1px solid rgba(56,189,248,0.35);
  letter-spacing: 1px;
}
.related-card-body {
  padding: 22px 24px 24px;
}
.related-card-body h3 {
  font-size: 1.08rem;
  font-weight: 600;
  color: var(--text-title);
  margin-bottom: 10px;
  line-height: 1.5;
  letter-spacing: .2px;
}
.related-card-body p {
  font-size: .9rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 14px;
}
.related-date {
  font-size: .8rem;
  color: var(--text-muted);
}
.read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .87rem;
  font-weight: 600;
  color: var(--glow-blue) !important;
}
.read-more:hover {
  color: var(--neon-cyan) !important;
}
/* ===== Article CTA ===== */
.article-cta-section {
  padding: var(--section-pad-desktop) 0;
  background: var(--bg-secondary);
}
.article-cta-panel {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-card);
  padding: 48px 56px;
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.article-cta-text h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 8px;
  letter-spacing: .3px;
}
.article-cta-text p {
  color: var(--text-muted);
  margin: 0;
  font-size: .98rem;
}
.article-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
/* ===== Footer ===== */
.site-footer {
  background: #071120;
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 64px 0 0;
  margin-top: 0;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent-blue), var(--neon-cyan));
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: #fff;
  box-shadow: 0 0 14px rgba(30,144,255,0.45);
  flex-shrink: 0;
}
.footer-brand span {
  color: var(--text-title);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: .4px;
}
.footer-desc {
  color: var(--text-muted);
  font-size: .9rem;
  line-height: 1.8;
  margin-bottom: 0;
}
.footer-title {
  color: var(--text-title);
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 18px;
  letter-spacing: .3px;
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  color: var(--text-muted);
  font-size: .9rem;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.footer-links a:hover {
  color: var(--neon-cyan);
  transform: translateX(3px);
}
.footer-bottom {
  margin-top: 48px;
  padding: 20px 0;
  border-top: 1px solid rgba(255,255,255,0.06);
  gap: 10px;
}
.copyright {
  color: var(--text-muted);
  font-size: .82rem;
}
/* ===== Responsive ===== */
@media (max-width: 991px) {
  .navbar-nav .nav-link {
    padding: 12px 0 !important;
  }
  .navbar-nav .nav-link::after {
    left: 0;
    right: 0;
    bottom: 4px;
  }
  .navbar-collapse {
    background: rgba(10,22,40,0.98);
    border-radius: 0 0 16px 16px;
    padding: 14px 18px 18px;
    border: 1px solid rgba(255,255,255,0.08);
    margin-top: 0;
  }
  .article-hero-section {
    min-height: 360px;
    padding: 56px 0 44px;
  }
  .article-main-card {
    padding: 36px 32px;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .article-cta-panel {
    padding: 36px 32px;
  }
}
@media (max-width: 767px) {
  :root {
    --section-pad-desktop: 64px;
    --section-pad-tablet: 52px;
    --section-pad-mobile: 40px;
  }
  .article-content-section,
  .related-section,
  .article-cta-section {
    padding: var(--section-pad-mobile) 0;
  }
  .article-hero-section {
    min-height: 300px;
    padding: 40px 0 32px;
  }
  .article-hero-badge {
    font-size: .75rem;
    padding: 5px 14px;
    margin-bottom: 14px;
  }
  .article-hero-title {
    font-size: 1.5rem;
    margin-bottom: 14px;
  }
  .article-hero-meta {
    gap: 10px;
  }
  .article-hero-meta .meta-item {
    font-size: .8rem;
    padding: 4px 12px;
  }
  .breadcrumb-section {
    padding: 14px 0;
  }
  .breadcrumb-nav {
    font-size: .82rem;
    gap: 5px;
  }
  .breadcrumb-last {
    max-width: 200px;
  }
  .article-main-card {
    padding: 28px 20px;
    border-radius: 14px;
  }
  .article-rich-content {
    font-size: .95rem;
    line-height: 1.9;
  }
  .article-rich-content h2 {
    font-size: 1.3rem;
    padding-left: 10px;
  }
  .article-rich-content h3 {
    font-size: 1.12rem;
  }
  .article-rich-content blockquote {
    padding: 14px 16px;
    margin: 1.2em 0;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  .article-stats-panel {
    padding: 24px 18px;
  }
  .stat-number {
    font-size: 1.8rem;
  }
  .stat-label {
    font-size: .78rem;
  }
  .section-heading h2 {
    font-size: 1.4rem;
  }
  .section-heading p {
    font-size: .9rem;
  }
  .related-card-body {
    padding: 16px 18px 18px;
  }
  .article-cta-panel {
    padding: 28px 20px;
    flex-direction: column;
    align-items: flex-start;
  }
  .article-cta-text h2 {
    font-size: 1.25rem;
  }
  .article-cta-actions {
    width: 100%;
  }
  .article-cta-actions .btn-primary-glow,
  .article-cta-actions .btn-glass {
    flex: 1;
    justify-content: center;
    padding: 12px 20px;
    font-size: .9rem;
  }
  .site-footer {
    padding: 48px 0 0;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 6px;
  }
}
@media (max-width: 520px) {
  .article-hero-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .article-hero-meta .meta-item {
    width: 100%;
    justify-content: flex-start;
  }
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .related-card-img {
    aspect-ratio: 16/10;
  }
  .article-cta-actions {
    flex-direction: column;
  }
  .article-cta-actions .btn-primary-glow,
  .article-cta-actions .btn-glass {
    width: 100%;
  }
  .navbar-brand {
    font-size: 1.15rem;
  }
  .navbar-brand .logo-icon {
    width: 32px;
    height: 32px;
    font-size: .95rem;
    border-radius: 8px;
  }
}

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}