/* roulang page: index */
/* ===== 设计令牌 ===== */
:root {
  --primary: #3D5AFE;
  --primary-light: #536DFE;
  --accent: #00E5FF;
  --bg-dark: #0A0E27;
  --bg-alt: #0D1233;
  --bg-footer: #080B20;
  --text-main: #E8EDFF;
  --text-secondary: #A8B3E0;
  --text-muted: #5E6AA0;
  --success: #00E676;
  --warning: #FFB300;
  --error: #FF5252;
  --glass-bg: rgba(255,255,255,0.06);
  --glass-border: rgba(255,255,255,0.08);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 999px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.25);
  --shadow-hover: 0 16px 48px rgba(61,90,254,0.18);
  --glow-btn: 0 0 20px rgba(0,229,255,0.35), 0 0 60px rgba(61,90,254,0.15);
  --container: 1200px;
  --pad-section: 96px;
  --pad-section-mobile: 64px;
  --transition: 0.3s ease;
}

/* ===== 基础 Reset ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  background: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  color: var(--text-main);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

ul, ol {
  list-style: none;
}

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

button {
  cursor: pointer;
  border: none;
  background: none;
}

:focus-visible {
  outline: 2px dashed var(--accent);
  outline-offset: 2px;
}

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

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 15px;
  padding: 14px 32px;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  box-shadow: 0 4px 24px rgba(61,90,254,0.35);
}

.btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: var(--glow-btn);
  color: #fff;
}

.btn-secondary {
  background: transparent;
  color: var(--text-main);
  border: 1px solid rgba(255,255,255,0.3);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.08);
  color: var(--accent);
  border-color: var(--accent);
}

.btn-lg {
  padding: 16px 48px;
  font-size: 16px;
}

/* ===== 区块标题 ===== */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-header .section-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(0,229,255,0.12);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.2px;
  color: var(--text-main);
  line-height: 1.3;
}

.section-header p {
  font-size: 16px;
  color: var(--text-secondary);
  margin-top: 12px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== 导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 72px;
  background: rgba(10,14,39,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
}

.nav-inner {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

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

.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 14px;
  color: #fff;
  letter-spacing: -0.5px;
}

.logo-text {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.5px;
}

.logo-badge {
  font-size: 10px;
  color: #fff;
  background: #FF5252;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 600;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.site-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 6px 0;
  position: relative;
  transition: color 0.2s;
}

.nav-link:hover {
  color: var(--accent);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.3s;
}

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

.nav-link.active {
  color: var(--text-main);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

.nav-mobile-cta {
  display: none;
}

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border-radius: 8px;
  padding: 8px;
  background: rgba(255,255,255,0.08);
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.active span:nth-child(2) {
  opacity: 0;
}
.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  position: relative;
  background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
  overflow: hidden;
  padding-top: 72px;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(10,14,39,0.97) 0%, rgba(10,14,39,0.82) 40%, rgba(10,14,39,0.4) 75%, rgba(10,14,39,0.65) 100%);
  z-index: 1;
}

.hero::after {
  content: '';
  position: absolute;
  top: -15%;
  right: -8%;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(0,229,255,0.28) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(80px);
  z-index: 2;
}

.hero .container {
  position: relative;
  z-index: 3;
  width: 100%;
}

.hero-content {
  max-width: 680px;
  padding-top: 60px;
  padding-bottom: 100px;
}

.hero-content .hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  background: rgba(0,229,255,0.1);
  border: 1px solid rgba(0,229,255,0.2);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 28px;
  letter-spacing: 0.04em;
}

.hero-content h1 {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.5px;
  color: var(--text-main);
  margin-bottom: 20px;
}

.hero-content h1 .highlight {
  background: linear-gradient(135deg, var(--accent), var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content .hero-desc {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 560px;
}

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

.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  width: 44px;
  height: 44px;
  justify-content: center;
}

.scroll-indicator .line {
  width: 2px;
  height: 22px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollPulse 2s infinite;
}

.scroll-indicator .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: scrollPulse 2s infinite 0.3s;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: translateY(0); }
  50% { opacity: 1; transform: translateY(4px); }
}

/* ===== 数字条 ===== */
.stats-bar {
  position: relative;
  z-index: 6;
  background: var(--bg-alt);
  border-bottom: 1px solid var(--glass-border);
  padding: 24px 0;
}

.stats-bar::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.4;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.stat-item {
  padding: 8px 0;
}

.stat-number {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.2;
  letter-spacing: -1px;
}

.stat-number .accent {
  color: var(--accent);
}

.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
  letter-spacing: 0.04em;
}

/* ===== 板块通用 ===== */
.section {
  padding: var(--pad-section) 0;
  position: relative;
}

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

/* ===== 三步上手 ===== */
.steps {
  padding: var(--pad-section) 0;
  position: relative;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  position: relative;
}

.steps-grid::before {
  content: '';
  position: absolute;
  top: 48px;
  left: 12%;
  right: 12%;
  height: 2px;
  background: linear-gradient(90deg, rgba(61,90,254,0.2), rgba(0,229,255,0.5), rgba(61,90,254,0.2));
  border-radius: 2px;
  transition: background 0.4s ease;
}

.step-item {
  position: relative;
  text-align: center;
  padding: 0 16px;
}

.step-number {
  font-size: 48px;
  font-weight: 900;
  line-height: 1;
  color: rgba(255,255,255,0.15);
  letter-spacing: -2px;
  margin-bottom: 16px;
  transition: color 0.3s;
}

.step-item:hover .step-number {
  color: rgba(0,229,255,0.4);
}

.step-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: var(--accent);
  backdrop-filter: blur(8px);
  transition: all var(--transition);
}

.step-item:hover .step-icon {
  border-color: var(--accent);
  box-shadow: 0 0 24px rgba(0,229,255,0.2);
}

.step-item h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}

.step-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  max-width: 260px;
  margin: 0 auto;
}

/* ===== 案例证明 ===== */
.cases {
  padding: var(--pad-section) 0;
  background: var(--bg-alt);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.case-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  height: 100%;
}

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(0,229,255,0.25);
}

.case-cover {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.case-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.case-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,14,39,0.5), transparent 50%);
}

.case-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 2;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  background: rgba(10,14,39,0.8);
  border: 1px solid rgba(0,229,255,0.3);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  backdrop-filter: blur(8px);
}

.case-body {
  padding: 24px;
}

.case-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
}

.case-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.case-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--accent);
  font-weight: 600;
}

/* ===== FAQ ===== */
.faq {
  padding: var(--pad-section) 0;
}

.faq-container {
  max-width: 860px;
  margin: 0 auto;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  overflow: hidden;
}

.faq-item {
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: background 0.3s;
}

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

.faq-item.open {
  background: rgba(61,90,254,0.1);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
  transition: color 0.2s;
}

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

.faq-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.faq-icon::before,
.faq-icon::after {
  content: '';
  position: absolute;
  background: var(--accent);
  border-radius: 2px;
  transition: transform 0.3s ease;
}

.faq-icon::before {
  width: 14px;
  height: 2px;
}

.faq-icon::after {
  width: 2px;
  height: 14px;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-item.open .faq-answer {
  max-height: 300px;
}

.faq-answer-inner {
  padding: 0 24px 24px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ===== 最新资讯（CMS数据注入区） ===== */
.news {
  padding: var(--pad-section) 0;
  background: var(--bg-alt);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.news-card {
  display: flex;
  flex-direction: column;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 24px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(0,229,255,0.25);
}

.news-category {
  align-self: flex-start;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  background: rgba(0,229,255,0.15);
  padding: 4px 12px;
  border-radius: 4px;
  margin-bottom: 14px;
  letter-spacing: 0.03em;
}

.news-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.4;
  margin-bottom: 12px;
  transition: color 0.2s;
}

.news-card:hover .news-title {
  color: var(--accent);
}

.news-summary {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.news-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.news-date {
  font-size: 13px;
  color: var(--text-muted);
}

.news-more {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  transition: transform 0.2s;
}

.news-card:hover .news-more {
  transform: translateX(4px);
}

.news-empty {
  grid-column: 1 / -1;
  height: 200px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  background: var(--glass-bg);
  border: 1px dashed var(--glass-border);
  border-radius: var(--radius-md);
}

.news-empty .empty-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}

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

/* ===== CTA ===== */
.cta {
  padding: var(--pad-section) 0;
  position: relative;
  background: var(--bg-dark);
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  left: 20%;
  top: 20%;
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, rgba(61,90,254,0.35) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(60px);
}

.cta::after {
  content: '';
  position: absolute;
  right: 10%;
  bottom: 10%;
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(0,229,255,0.2) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(60px);
}

.cta-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: -0.3px;
}

.cta-content p {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 36px;
}

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

.cta-compliance {
  margin-top: 32px;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-footer);
  padding: 64px 0 0;
  border-top: 1px solid rgba(255,255,255,0.04);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-brand .logo {
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 340px;
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 20px;
}

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

.footer-col ul a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.2s;
}

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

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 14px;
  line-height: 1.6;
}

.footer-contact .contact-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 16px;
}

.footer-social .social-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.footer-social .social-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 16px rgba(0,229,255,0.2);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.04);
  padding: 24px 0;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

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

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

/* ===== 动画 ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.hero-content {
  animation: fadeInUp 0.6s ease both;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .cases-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .steps-grid::before {
    display: none;
  }
}

@media (max-width: 768px) {
  :root {
    --pad-section: 64px;
  }

  .site-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: rgba(10,14,39,0.98);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 99;
    transition: right 0.4s ease;
    backdrop-filter: blur(20px);
  }

  .site-nav.open {
    right: 0;
  }

  .nav-links {
    flex-direction: column;
    gap: 28px;
    text-align: center;
  }

  .nav-link {
    font-size: 20px;
    font-weight: 700;
    padding: 12px 0;
  }

  .nav-mobile-cta {
    display: block;
    margin-top: 24px;
  }

  .nav-actions .btn-primary {
    display: none;
  }

  .hamburger {
    display: flex;
    position: relative;
    z-index: 101;
  }

  .hero-content h1 {
    font-size: 32px;
  }

  .hero-content .hero-desc {
    font-size: 15px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .stat-number {
    font-size: 26px;
  }

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

  .step-item {
    padding: 0 24px;
  }

  .section-header h2 {
    font-size: 22px;
  }

  .cta-content h2 {
    font-size: 24px;
  }

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

  .faq-question {
    font-size: 15px;
    padding: 16px 20px;
  }
}

@media (max-width: 576px) {
  .container {
    padding: 0 16px;
  }

  .hero .container {
    padding: 0 20px;
  }

  .hero-content {
    padding-top: 40px;
    padding-bottom: 80px;
  }

  .hero-content h1 {
    font-size: 30px;
    line-height: 1.3;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

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

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

  .btn-lg {
    width: 100%;
    padding: 16px 32px;
  }

  .cta-actions {
    flex-direction: column;
    width: 100%;
  }

  .cta-actions .btn {
    width: 100%;
  }
}

@media (max-width: 400px) {
  .logo-text {
    font-size: 17px;
  }

  .logo-badge {
    display: none;
  }

  .status-bar {
    padding: 16px 0;
  }

  .stat-number {
    font-size: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .fade-in-up {
    opacity: 1;
    transform: none;
  }
}

/* roulang page: article */
/* ===== Design Tokens ===== */
:root {
  --primary: #3D5AFE;
  --primary-light: #536DFE;
  --accent: #00E5FF;
  --bg: #0A0E27;
  --bg-alt: #0D1233;
  --glass-bg: rgba(255,255,255,0.06);
  --glass-border: rgba(255,255,255,0.08);
  --text: #E8EDFF;
  --text-secondary: #A8B3E0;
  --text-muted: #5E6AA0;
  --success: #00E676;
  --warning: #FFB300;
  --error: #FF5252;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.25);
  --shadow-hover: 0 16px 48px rgba(61,90,254,0.18);
  --glow-btn: 0 0 20px rgba(0,229,255,0.35), 0 0 60px rgba(61,90,254,0.15);
  --border: 1px solid rgba(255,255,255,0.08);
  --space-lg: 96px;
  --space-sm: 64px;
  --container: 1200px;
  --font-stack: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-stack);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  letter-spacing: 0.03em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--accent); }
button { font-family: inherit; border: none; background: none; cursor: pointer; }
input, textarea { font-family: inherit; }
ul, ol { list-style: none; }

:focus-visible {
  outline: 2px dashed rgba(255,255,255,0.8);
  outline-offset: 2px;
}

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

/* ===== Header / Navigation ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 72px;
  background: rgba(10,14,39,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  z-index: 1000;
}

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

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

.logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 4px;
  background: linear-gradient(135deg, #3D5AFE, #00E5FF);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 15px;
  color: #fff;
  letter-spacing: 0;
}

.logo-text {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.2px;
  color: var(--text);
}

.logo-badge {
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  background: var(--error);
  padding: 2px 8px;
  border-radius: 4px;
  letter-spacing: 0.08em;
  margin-left: 2px;
}

.site-nav { display: block; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  margin: 0;
  padding: 0;
}

.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 4px;
  position: relative;
  transition: color 0.2s ease;
}

.nav-link:hover { color: var(--accent); }

.nav-link.active {
  color: var(--text);
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-mobile-cta { display: none; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  padding: 12px 28px;
  border-radius: 999px;
  transition: all 0.3s ease;
  cursor: pointer;
  letter-spacing: 0.03em;
  line-height: 1.4;
  min-height: 44px;
}

.btn-primary {
  background: linear-gradient(135deg, #3D5AFE, #00E5FF);
  color: #fff;
  border: none;
  box-shadow: 0 4px 20px rgba(61,90,254,0.3);
}

.btn-primary:hover {
  color: #fff;
  filter: brightness(1.1);
  box-shadow: var(--glow-btn);
  transform: translateY(-2px);
}

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

.btn-secondary {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.3);
  color: var(--text);
  backdrop-filter: blur(4px);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.08);
  color: var(--text);
  border-color: rgba(255,255,255,0.5);
  transform: translateY(-2px);
}

.btn-lg {
  font-size: 17px;
  padding: 16px 40px;
}

.hamburger {
  display: none;
  flex-direction: column;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 8px;
  background: rgba(255,255,255,0.05);
  padding: 0;
  transition: all 0.3s ease;
}

.hamburger:hover {
  background: rgba(255,255,255,0.12);
  border-color: var(--accent);
}

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

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

.hamburger.open span:nth-child(2) { opacity: 0; }

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

/* ===== Article Page Hero ===== */
.article-hero {
  padding: 160px 0 48px;
  position: relative;
  background: linear-gradient(180deg, #0D1233 0%, #0A0E27 100%);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  overflow: hidden;
}

.article-hero::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -80px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(61,90,254,0.25) 0%, transparent 70%);
  pointer-events: none;
}

.article-hero::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: 20%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(0,229,255,0.12) 0%, transparent 70%);
  pointer-events: none;
}

.article-hero .container {
  position: relative;
  z-index: 2;
  max-width: 900px;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

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

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

.breadcrumbs .sep {
  color: var(--text-muted);
  opacity: 0.6;
}

.breadcrumbs .current {
  color: var(--text-secondary);
  max-width: 260px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.article-hero h1 {
  font-size: 38px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.3px;
  color: var(--text);
  margin-bottom: 20px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  font-size: 13px;
  color: var(--text-muted);
}

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

.article-meta .meta-item svg {
  width: 15px;
  height: 15px;
  opacity: 0.7;
}

.category-badge {
  display: inline-flex;
  align-items: center;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  background: rgba(0,229,255,0.15);
  padding: 4px 14px;
  border-radius: 999px;
  letter-spacing: 0.05em;
}

/* ===== Article Body ===== */
.article-body {
  padding: 56px 0 72px;
}

.article-content {
  max-width: 760px;
  margin: 0 auto;
  background: var(--bg-alt);
  border-radius: 24px;
  padding: 56px 64px;
  border: 1px solid rgba(255,255,255,0.06);
  box-shadow: var(--shadow-card);
}

.article-content p {
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: 0.03em;
  color: var(--text-secondary);
  margin-bottom: 24px;
  max-width: 640px;
}

.article-content p strong {
  color: var(--text);
  font-weight: 600;
}

.article-content h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  margin: 48px 0 16px;
  letter-spacing: -0.2px;
  line-height: 1.4;
}

.article-content h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin: 36px 0 12px;
  line-height: 1.4;
}

.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: rgba(61,90,254,0.08);
  padding: 16px 24px;
  border-radius: 0 12px 12px 0;
  margin: 24px 0;
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.7;
}

.article-content ul,
.article-content ol {
  color: var(--text-secondary);
  font-size: 17px;
  line-height: 1.75;
  margin-bottom: 24px;
  padding-left: 24px;
}

.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }

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

.article-content img {
  border-radius: 12px;
  margin: 32px 0;
  border: 1px solid rgba(255,255,255,0.08);
}

.article-content code {
  background: #1a1f42;
  border-radius: 6px;
  padding: 2px 8px;
  font-size: 0.9em;
  color: var(--accent);
}

.article-content pre {
  background: #1a1f42;
  border-radius: 12px;
  padding: 20px 24px;
  overflow-x: auto;
  margin: 24px 0;
  border: 1px solid rgba(255,255,255,0.08);
}

.article-content pre code {
  background: none;
  padding: 0;
  color: var(--text);
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  background: var(--bg);
  border-radius: 12px;
  overflow: hidden;
}

.article-content th,
.article-content td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.article-content tr:nth-child(even) {
  background: rgba(255,255,255,0.03);
}

/* ===== Article Footer / Tags ===== */
.article-extras {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.tags-label {
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  font-weight: 600;
  text-transform: uppercase;
}

.tag {
  display: inline-flex;
  align-items: center;
  font-size: 13px;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.06);
  border-radius: 999px;
  padding: 6px 16px;
  transition: all 0.2s ease;
}

.tag:hover {
  color: var(--accent);
  background: rgba(0,229,255,0.12);
  border-color: rgba(0,229,255,0.2);
}

.share-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 24px;
}

.share-label {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 600;
}

.share-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  transition: all 0.2s ease;
}

.share-btn:hover {
  background: rgba(0,229,255,0.15);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0,229,255,0.15);
}

.share-btn svg {
  width: 16px;
  height: 16px;
  color: var(--text-secondary);
}

/* ===== Related Posts ===== */
.related-section {
  padding: 0 0 96px;
}

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

.related-item {
  background: var(--bg-alt);
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.related-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.related-item a {
  display: block;
}

.related-thumb {
  height: 160px;
  background: linear-gradient(135deg, #39a5dc 0%, #0D1233 100%);
  background-size: cover;
  background-position: center;
  position: relative;
}

.related-item .card-body {
  padding: 20px;
}

.related-item h4 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 10px;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 44px;
}

.related-item .date {
  font-size: 13px;
  color: var(--text-muted);
}

.back-to-list {
  text-align: right;
  margin-top: 32px;
}

.back-to-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  transition: all 0.2s ease;
}

.back-to-list a:hover {
  color: var(--accent);
  gap: 12px;
}

.back-to-list svg {
  width: 16px;
  height: 16px;
}

/* ===== Article CTA ===== */
.article-cta {
  background: #080B20;
  position: relative;
  overflow: hidden;
  padding: 80px 0;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.article-cta::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 600px;
  height: 400px;
  transform: translate(-50%, -50%);
  background: radial-gradient(ellipse, rgba(61,90,254,0.3) 0%, rgba(0,229,255,0.12) 40%, transparent 70%);
  pointer-events: none;
}

.article-cta .cta-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.article-cta h2 {
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 12px;
}

.article-cta p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

/* ===== Footer ===== */
.site-footer {
  background: #080B20;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 64px 0 0;
  margin-top: 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 16px 0 20px;
  line-height: 1.8;
  max-width: 380px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.social-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.social-btn:hover {
  background: rgba(0,229,255,0.15);
  border-color: rgba(0,229,255,0.3);
  color: var(--accent);
  transform: translateY(-2px);
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 20px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

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

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.contact-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--accent);
}

.footer-bottom {
  padding: 24px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

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

/* ===== Empty State ===== */
.empty-state {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  gap: 12px;
  font-size: 14px;
  color: var(--text-muted);
  flex-direction: column;
}

.empty-state .empty-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  :root { --space-lg: 72px; }
  
  .nav-links { gap: 20px; }
  .article-content { padding: 40px 36px; }
}

@media (max-width: 768px) {
  :root { --space-lg: 64px; --space-sm: 56px; }
  
  .site-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(10,14,39,0.97);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,0.08);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
  }
  
  .site-nav.open { max-height: 100vh; }
  
  .nav-links {
    flex-direction: column;
    gap: 0;
    padding: 24px 24px 32px;
  }
  
  .nav-links li { width: 100%; }
  
  .nav-link {
    display: block;
    padding: 14px 0;
    font-size: 17px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
  }
  
  .nav-link.active::after { display: none; }
  
  .nav-mobile-cta {
    display: block;
    margin-top: 24px;
  }
  
  .nav-mobile-cta .btn {
    width: 100%;
  }
  
  .nav-actions .btn { display: none; }
  .hamburger { display: flex; }
  
  .nav-actions { gap: 8px; }
  
  .article-hero {
    padding-top: 130px;
    padding-bottom: 36px;
  }
  
  .article-hero h1 { font-size: 26px; }
  
  .article-content {
    padding: 28px 20px;
    border-radius: 16px;
  }
  
  .related-grid { grid-template-columns: 1fr; gap: 16px; }
  
  .article-meta { gap: 12px; }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  
  .article-cta { padding: 56px 0; }
  .article-cta h2 { font-size: 24px; }
}

@media (max-width: 576px) {
  .container { padding: 0 16px; }
  .article-content p { font-size: 16px; }
  .article-hero h1 { font-size: 22px; }
  .article-meta { flex-direction: column; align-items: flex-start; gap: 8px; }
  .breadcrumbs .current { max-width: 200px; }
  .article-cta h2 { font-size: 22px; }
  .article-cta p { font-size: 14px; }
}

/* ===== Scroll reveal ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.article-hero .container {
  animation: fadeInUp 0.6s ease both;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* roulang page: category1 */
:root {
  --primary: #3D5AFE;
  --primary-light: #536DFE;
  --accent: #00E5FF;
  --bg-dark: #0A0E27;
  --bg-alt: #0D1233;
  --bg-footer: #080B20;
  --text-main: #E8EDFF;
  --text-secondary: #A8B3E0;
  --text-muted: #5E6AA0;
  --border: rgba(255,255,255,0.08);
  --glass-bg: rgba(255,255,255,0.06);
  --success: #00E676;
  --warning: #FFB300;
  --error: #FF5252;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.25);
  --shadow-hover: 0 16px 48px rgba(61,90,254,0.18);
  --shadow-glow: 0 0 20px rgba(0,229,255,0.35), 0 0 60px rgba(61,90,254,0.15);
  --font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  --container: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-family);
  background: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a { color: var(--text-main); text-decoration: none; transition: color .2s ease; }

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

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

ul, ol { list-style: none; }

input, textarea { font-family: inherit; }

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

.no-js .scroll-reveal { opacity: 1 !important; transform: none !important; }

/* ===== Header & Nav ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  z-index: 1000;
  background: rgba(10, 14, 39, 0.85);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

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

.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.02em;
  box-shadow: 0 4px 16px rgba(61, 90, 254, 0.35);
}

.logo-text {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.2px;
  color: var(--text-main);
}

.logo-badge {
  font-size: 11px;
  font-weight: 600;
  color: #fff;
  background: #FF5252;
  border-radius: 6px;
  padding: 2px 8px;
  letter-spacing: 0.06em;
  margin-left: 2px;
}

.site-nav { display: flex; align-items: center; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  position: relative;
  padding: 8px 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
  transition: color .2s ease;
}

.nav-link:hover { color: var(--text-main); }

.nav-link.active {
  color: var(--text-main);
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

.nav-actions { display: flex; align-items: center; gap: 12px; }

.nav-mobile-cta { display: none; }

.hamburger {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  transition: background .2s ease;
}

.hamburger:hover { background: rgba(255,255,255,0.1); }

.hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--text-main);
  transition: transform .3s ease, opacity .3s ease;
}

.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 700;
  padding: 14px 32px;
  border-radius: var(--radius-pill);
  border: none;
  transition: transform .2s ease, box-shadow .3s ease, background .3s ease, opacity .2s ease;
  cursor: pointer;
  line-height: 1;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  box-shadow: 0 4px 20px rgba(61, 90, 254, 0.3);
}

.btn-primary:hover {
  color: #fff;
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

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

.btn-outline {
  background: transparent;
  color: var(--text-main);
  border: 1.5px solid rgba(255,255,255,0.3);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.08);
  color: var(--text-main);
  border-color: rgba(255,255,255,0.5);
  transform: translateY(-2px);
}

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

.btn-lg { padding: 18px 48px; font-size: 16px; }

/* ===== Page Banner ===== */
.page-banner {
  position: relative;
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-image: linear-gradient(90deg, rgba(10,14,39,0.92) 0%, rgba(10,14,39,0.7) 50%, rgba(10,14,39,0.45) 100%), url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  padding: 120px 0 64px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.banner-content {
  position: relative;
  z-index: 2;
  animation: fadeInUp .6s ease both;
}

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

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

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

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

.page-banner h1 {
  font-size: 44px;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.2;
  color: var(--text-main);
  margin-bottom: 12px;
}

.banner-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===== Intro Section ===== */
.intro-section {
  padding: 96px 0;
  background: var(--bg-dark);
}

.intro-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 64px;
  align-items: center;
}

.intro-content .section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent);
  background: rgba(0, 229, 255, 0.12);
  border: 1px solid rgba(0, 229, 255, 0.2);
  border-radius: var(--radius-pill);
  padding: 6px 16px;
  margin-bottom: 20px;
}

.intro-content h2 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.4px;
  line-height: 1.3;
  margin-bottom: 20px;
  color: var(--text-main);
}

.intro-content p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 16px;
  text-align: justify;
}

.intro-content .btn { margin-top: 12px; }

.intro-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.intro-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(61,90,254,0.15), rgba(0,229,255,0.05));
  pointer-events: none;
}

.intro-media img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  transition: transform .5s ease;
}

.intro-media:hover img { transform: scale(1.03); }

/* ===== Features Section ===== */
.features-section {
  padding: 96px 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

.section-head .section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent);
  background: rgba(0, 229, 255, 0.12);
  border: 1px solid rgba(0, 229, 255, 0.2);
  border-radius: var(--radius-pill);
  padding: 6px 16px;
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.3px;
  line-height: 1.3;
  color: var(--text-main);
  margin-bottom: 14px;
}

.section-head p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
}

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

.feature-card {
  background: var(--glass-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: opacity .3s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(0, 229, 255, 0.25);
}

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

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(61,90,254,0.2), rgba(0,229,255,0.15));
  border: 1px solid rgba(0,229,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.2px;
  color: var(--text-main);
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-secondary);
}

/* ===== Process Section ===== */
.process-section {
  padding: 96px 0;
  background: var(--bg-dark);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.process-grid::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 60px;
  right: 60px;
  height: 2px;
  background: linear-gradient(90deg, rgba(61,90,254,0.4), rgba(0,229,255,0.6));
  border-radius: 2px;
  pointer-events: none;
}

.process-item {
  text-align: center;
  padding: 24px 16px;
  position: relative;
  z-index: 2;
}

.process-num {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, rgba(61,90,254,0.25), rgba(0,229,255,0.15));
  border: 1px solid rgba(0,229,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  color: var(--accent);
  box-shadow: 0 8px 32px rgba(61,90,254,0.2);
}

.process-item h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
}

.process-item p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
}

/* ===== FAQ Section ===== */
.faq-section {
  padding: 96px 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.faq-container {
  max-width: 860px;
  margin: 0 auto;
  background: var(--glass-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
}

.faq-item {
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: background .3s ease;
}

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

.faq-item.active {
  background: rgba(61, 90, 254, 0.1);
  border-radius: var(--radius-sm);
  margin: 4px 0;
  border-bottom: none;
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 8px;
  font-size: 17px;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  text-align: left;
  width: 100%;
  transition: color .2s ease;
}

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

.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--text-main);
  transition: transform .3s ease, background .3s ease, color .3s ease;
  font-size: 16px;
  font-weight: 400;
  line-height: 1;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: rgba(0, 229, 255, 0.15);
  color: var(--accent);
  border-color: var(--accent);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s ease;
}

.faq-answer-inner {
  padding: 0 8px 20px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-secondary);
}

.faq-item.active .faq-answer {
  max-height: 600px;
}

/* ===== CTA Section ===== */
.cta-section {
  position: relative;
  padding: 96px 0;
  background: linear-gradient(135deg, rgba(61,90,254,0.25), rgba(0,229,255,0.1)), var(--bg-dark);
  text-align: center;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 700px;
  height: 400px;
  background: radial-gradient(circle, rgba(61,90,254,0.25) 0%, transparent 70%);
  pointer-events: none;
}

.cta-inner {
  position: relative;
  z-index: 2;
}

.cta-inner h2 {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.4px;
  color: var(--text-main);
  margin-bottom: 16px;
}

.cta-inner p {
  font-size: 17px;
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

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

.cta-note {
  margin-top: 24px;
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-footer);
  padding: 72px 0 0;
  border-top: 1px solid var(--border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-brand .logo { margin-bottom: 20px; }

.footer-brand p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-top: 16px;
  text-align: justify;
}

.footer-social {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.social-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all .3s ease;
}

.social-btn:hover {
  background: rgba(0, 229, 255, 0.12);
  color: var(--accent);
  border-color: rgba(0, 229, 255, 0.3);
  transform: translateY(-3px);
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}

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

.footer-col ul li a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color .2s ease, padding-left .2s ease;
}

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

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
}

.contact-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  color: var(--text-muted);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 24px 0 28px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== Scroll Reveal ===== */
.scroll-reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}

.scroll-reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Focus states ===== */
a:focus-visible,
button:focus-visible {
  outline: 2px dashed #fff;
  outline-offset: 3px;
  border-radius: 4px;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .nav-links { gap: 20px; }
  .intro-grid { gap: 40px; }
  .process-grid::before { left: 40px; right: 40px; }
}

@media (max-width: 768px) {
  .container { padding: 0 16px; }

  .site-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 14, 39, 0.98);
    backdrop-filter: blur(16px);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 48px 32px 32px;
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .3s ease, transform .3s ease, visibility .3s;
    z-index: 999;
  }

  .site-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

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

  .nav-links li { width: 100%; text-align: center; }

  .nav-link {
    display: block;
    padding: 16px 0;
    font-size: 18px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
  }

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

  .nav-link.active {
    color: var(--accent);
  }

  .nav-mobile-cta {
    display: block;
    margin-top: 32px;
  }
  .nav-mobile-cta .btn { width: 100%; }

  .nav-actions .btn { display: none; }

  .hamburger { display: flex; }

  .page-banner { min-height: 260px; padding: 96px 0 48px; }
  .page-banner h1 { font-size: 32px; }

  .intro-section,
  .features-section,
  .process-section,
  .faq-section,
  .cta-section { padding: 64px 0; }

  .intro-grid { grid-template-columns: 1fr; gap: 32px; }
  .intro-content h2 { font-size: 26px; }
  .intro-media img { height: 260px; }

  .features-grid { grid-template-columns: 1fr; gap: 16px; }
  .section-head h2 { font-size: 26px; }

  .process-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .process-grid::before { display: none; }
  .process-item { padding: 16px 8px; }
  .process-num { width: 64px; height: 64px; font-size: 16px; }

  .faq-container { padding: 16px; }
  .faq-question { font-size: 15px; padding: 16px 4px; }

  .cta-inner h2 { font-size: 28px; }
  .cta-buttons { flex-direction: column; align-items: stretch; gap: 12px; }
  .cta-buttons .btn { width: 100%; }

  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom p { font-size: 12px; }
}

@media (max-width: 576px) {
  .logo-text { font-size: 16px; }
  .logo-badge { font-size: 10px; padding: 2px 6px; }

  .page-banner h1 { font-size: 28px; }
  .banner-subtitle { font-size: 14px; }

  .intro-content h2 { font-size: 22px; }
  .intro-content p { font-size: 15px; }

  .section-head h2 { font-size: 22px; }
  .section-head p { font-size: 14px; }

  .feature-card { padding: 24px 20px; }
  .feature-card h3 { font-size: 18px; }

  .process-grid { grid-template-columns: 1fr; gap: 24px; }
  .process-item { padding: 0 8px; }

  .faq-question { font-size: 14px; }

  .cta-inner h2 { font-size: 24px; }
  .cta-inner p { font-size: 15px; }
  .btn-lg { padding: 16px 32px; font-size: 15px; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .scroll-reveal {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* roulang page: category2 */
:root {
  --primary: #3D5AFE;
  --primary-light: #536DFE;
  --accent: #00E5FF;
  --bg: #0A0E27;
  --bg-alt: #0D1233;
  --card-bg: rgba(255, 255, 255, 0.06);
  --card-border: rgba(255, 255, 255, 0.08);
  --text-main: #E8EDFF;
  --text-secondary: #A8B3E0;
  --text-muted: #5E6AA0;
  --success: #00E676;
  --warning: #FFB300;
  --error: #FF5252;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.25);
  --shadow-hover: 0 16px 48px rgba(61, 90, 254, 0.18);
  --glow-btn: 0 0 20px rgba(0, 229, 255, 0.35), 0 0 60px rgba(61, 90, 254, 0.15);
  --font-sans: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  --space-section: 96px;
  --space-section-mobile: 64px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text-main);
  line-height: 1.7;
  font-size: 16px;
  letter-spacing: 0.03em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

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

ul, ol {
  list-style: none;
}

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

.section {
  padding: var(--space-section) 0;
}

@media (max-width: 768px) {
  .section {
    padding: var(--space-section-mobile) 0;
  }
}

/* ===== Header / Nav ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 72px;
  background: rgba(10, 14, 39, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--card-border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}

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

.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 4px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 14px;
  color: #fff;
  letter-spacing: 0;
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.2px;
}

.logo-badge {
  background: #FF5252;
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.08em;
  line-height: 1.4;
}

.site-nav {
  display: flex;
  align-items: center;
  flex: 1;
  justify-content: center;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 2px;
  position: relative;
  transition: color 0.2s;
}

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

.nav-links a.active {
  color: var(--text-main);
  font-weight: 600;
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 700;
  padding: 12px 32px;
  transition: all 0.3s ease;
  border: 1px solid transparent;
  cursor: pointer;
  text-align: center;
  line-height: 1.4;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  box-shadow: 0 4px 20px rgba(61, 90, 254, 0.3);
}

.btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: var(--glow-btn);
  color: #fff;
}

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

.btn-primary:focus-visible {
  outline: 2px dashed #fff;
  outline-offset: 2px;
}

.btn-secondary {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.3);
  color: var(--text-main);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all 0.3s ease;
}

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

.hamburger.open span:nth-child(2) {
  opacity: 0;
}

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

/* 移动端抽屉 */
.mobile-drawer {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 14, 39, 0.98);
  z-index: 999;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 32px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mobile-drawer.open {
  opacity: 1;
  visibility: visible;
}

.mobile-drawer a {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-main);
}

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

.mobile-drawer .btn {
  margin-top: 16px;
}

.nav-mobile-cta {
  display: none;
}

/* ===== Page Banner ===== */
.page-banner {
  position: relative;
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, rgba(10, 14, 39, 0.96), rgba(10, 14, 39, 0.75) 55%, rgba(10, 14, 39, 0.5)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding: 140px 0 60px;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.2) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.breadcrumb a {
  color: var(--text-muted);
}

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

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

.page-banner h1 {
  font-size: 40px;
  font-weight: 800;
  color: var(--text-main);
  position: relative;
  z-index: 1;
  letter-spacing: -0.2px;
}

.page-banner .banner-desc {
  max-width: 640px;
  margin: 16px auto 0;
  font-size: 16px;
  color: var(--text-secondary);
  position: relative;
  z-index: 1;
  line-height: 1.8;
}

/* ===== Intro Section ===== */
.intro-section {
  padding: var(--space-section) 0;
  background: var(--bg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.intro-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 56px;
  align-items: center;
}

.intro-text h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.4;
  margin-bottom: 20px;
  letter-spacing: -0.2px;
}

.intro-text p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.intro-text .highlight-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
}

.intro-text .highlight-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  color: var(--text-secondary);
}

.intro-text .highlight-item svg {
  flex-shrink: 0;
  margin-top: 4px;
}

.intro-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--card-border);
}

.intro-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(10, 14, 39, 0.2) 0%, transparent 60%);
}

.intro-image img {
  width: 100%;
  height: 100%;
  min-height: 320px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.intro-image:hover img {
  transform: scale(1.03);
}

/* ===== Features Section ===== */
.features-section {
  padding: var(--space-section) 0;
  background: var(--bg-alt);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.section-head {
  text-align: center;
  margin-bottom: 56px;
}

.section-head h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.2px;
  margin-bottom: 12px;
}

.section-head .section-sub {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 auto;
}

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

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  text-align: center;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(0, 229, 255, 0.2);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(61, 90, 254, 0.15), rgba(0, 229, 255, 0.15));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  transition: background 0.3s ease, transform 0.3s ease;
}

.feature-card:hover .feature-icon {
  background: linear-gradient(135deg, rgba(61, 90, 254, 0.3), rgba(0, 229, 255, 0.3));
  transform: translateY(-2px);
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}

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

/* ===== Steps Section ===== */
.steps-section {
  padding: var(--space-section) 0;
  background: var(--bg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.steps-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
  margin-top: 40px;
}

.steps-row::before {
  content: '';
  position: absolute;
  top: 32px;
  left: 8%;
  right: 8%;
  height: 2px;
  background: linear-gradient(90deg, rgba(61, 90, 254, 0.3), rgba(0, 229, 255, 0.3));
  border-radius: 2px;
  pointer-events: none;
}

.step-item {
  position: relative;
  text-align: center;
  padding: 0 8px;
}

.step-num {
  font-size: 48px;
  font-weight: 800;
  color: rgba(61, 90, 254, 0.35);
  line-height: 1;
  margin-bottom: 16px;
  display: inline-block;
  transition: color 0.3s ease;
  letter-spacing: -1px;
}

.step-item:hover .step-num {
  color: rgba(0, 229, 255, 0.7);
}

.step-item h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
}

.step-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 280px;
  margin: 0 auto;
}

/* ===== FAQ Section ===== */
.faq-section {
  padding: var(--space-section) 0;
  background: var(--bg-alt);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.faq-container {
  max-width: 860px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  overflow: hidden;
}

.faq-item {
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

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

.faq-item.active {
  background: rgba(61, 90, 254, 0.1);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  transition: color 0.2s ease;
}

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

.faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease, background 0.3s ease;
}

.faq-icon::before {
  content: '+';
  font-size: 20px;
  font-weight: 400;
  color: var(--text-secondary);
  line-height: 1;
  transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
  background: rgba(0, 229, 255, 0.15);
}

.faq-item.active .faq-icon::before {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ===== CTA Section ===== */
.cta-section {
  position: relative;
  padding: var(--space-section) 0;
  background: var(--bg);
  text-align: center;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 640px;
  height: 640px;
  background: radial-gradient(circle, rgba(61, 90, 254, 0.18) 0%, rgba(0, 229, 255, 0.08) 40%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.cta-section .container {
  position: relative;
  z-index: 1;
}

.cta-section h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 16px;
  letter-spacing: -0.2px;
}

.cta-section p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 580px;
  margin: 0 auto 32px;
  line-height: 1.8;
}

.cta-section .btn {
  padding: 16px 48px;
  font-size: 17px;
}

.cta-compliance {
  margin-top: 24px;
  font-size: 12px;
  color: var(--text-muted);
}

/* ===== Footer ===== */
.site-footer {
  background: #080B20;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-brand .logo {
  margin-bottom: 20px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 340px;
  margin-bottom: 24px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.social-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--card-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.3s ease;
}

.social-btn:hover {
  background: rgba(0, 229, 255, 0.15);
  color: var(--accent);
  transform: translateY(-2px);
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 20px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col ul a {
  font-size: 14px;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

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

.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-muted);
}

.contact-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== Animations ===== */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html {
    scroll-behavior: auto;
  }
  .fade-up {
    opacity: 1;
    transform: none;
  }
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .intro-grid {
    gap: 32px;
  }
  .features-grid {
    gap: 16px;
  }
  .nav-links {
    gap: 20px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  .site-header .nav-links {
    display: none;
  }
  .site-header .nav-actions .btn {
    display: none;
  }
  .hamburger {
    display: flex;
  }
  .mobile-drawer {
    display: flex;
  }
  .nav-mobile-cta {
    display: block;
  }
  .page-banner h1 {
    font-size: 28px;
  }
  .page-banner .banner-desc {
    font-size: 15px;
  }
  .intro-grid {
    grid-template-columns: 1fr;
  }
  .intro-image img {
    min-height: 240px;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .steps-row {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .steps-row::before {
    display: none;
  }
  .step-item {
    padding: 0;
  }
  .cta-section h2 {
    font-size: 24px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .section-head h2 {
    font-size: 22px;
  }
  .intro-text h2 {
    font-size: 22px;
  }
}

@media (max-width: 576px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .page-banner {
    min-height: 280px;
    padding: 120px 0 40px;
  }
  .page-banner h1 {
    font-size: 26px;
  }
  .cta-section .btn {
    width: 100%;
  }
  .footer-bottom {
    font-size: 12px;
  }
}