/* roulang page: index */
:root {
  --bg: #0B1110;
  --surface: #121A16;
  --surface-hover: #18231E;
  --primary: #3DF0B5;
  --secondary: #C4FF3D;
  --accent: #FF3DA5;
  --text: #EEF5F0;
  --text-muted: #A4B0A9;
  --border: rgba(238, 245, 240, 0.08);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 18px 40px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(61, 240, 181, 0.35);
  --transition: 200ms cubic-bezier(0.2, 0.8, 0.2, 1);
  --font-sans: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", "SF Mono", monospace;
}

*, *::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);
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

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

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

ul, ol {
  list-style: none;
}

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

.section {
  padding: clamp(64px, 8vw, 120px) 0;
  position: relative;
}

.section-head {
  max-width: 760px;
  margin-bottom: 48px;
}

.section-head h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.01em;
}

.section-head p {
  margin-top: 10px;
  color: var(--text-muted);
  font-size: 16px;
}

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

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 15px;
  line-height: 1.6;
  transition: all var(--transition);
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--primary);
  color: #0B1110;
}

.btn-primary:hover {
  background: #6BFFCD;
  box-shadow: 0 0 20px rgba(61, 240, 181, 0.25);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(1px) scale(0.98);
}

.btn-primary:focus-visible {
  outline: 2px dashed var(--primary);
  outline-offset: 3px;
}

.btn-ghost {
  background: transparent;
  border-color: rgba(238, 245, 240, 0.18);
  color: var(--text);
}

.btn-ghost:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(61, 240, 181, 0.06);
}

.btn-ghost:active {
  transform: translateY(1px) scale(0.98);
}

.btn-ghost:focus-visible {
  outline: 2px dashed var(--primary);
  outline-offset: 3px;
}

.btn-lg {
  padding: 16px 32px;
  font-size: 16px;
  border-radius: 16px;
  min-height: 56px;
}

/* ===== 徽章 / 标签 ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  line-height: 1.6;
}

.badge-progress {
  background: var(--primary);
  color: #0B1110;
}

.badge-pending {
  background: transparent;
  border: 1px solid rgba(238, 245, 240, 0.24);
  color: var(--text-muted);
}

.badge-done {
  background: var(--secondary);
  color: #0B1110;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: 4px;
  background: rgba(61, 240, 181, 0.1);
  color: var(--primary);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.6;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 17, 16, 0.92);
  backdrop-filter: saturate(120%) blur(8px);
  -webkit-backdrop-filter: saturate(120%) blur(8px);
  border-bottom: 1px solid var(--border);
}

.site-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), transparent);
  z-index: 1;
}

.header-inner {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  position: relative;
}

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

.brand-mark {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: var(--primary);
  color: #0B1110;
  font-weight: 800;
  font-size: 18px;
  box-shadow: 0 0 16px rgba(61, 240, 181, 0.3);
}

.brand-text {
  font-weight: 700;
  font-size: 17px;
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.main-nav ul {
  display: flex;
  gap: 4px;
  align-items: center;
}

.main-nav a {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  transition: color var(--transition), background var(--transition);
}

.main-nav a:hover {
  color: var(--primary);
  background: rgba(61, 240, 181, 0.04);
}

.main-nav a:hover::after {
  content: '';
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  animation: navLine 200ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

@keyframes navLine {
  from { transform: scaleX(0); opacity: 0.4; }
  to { transform: scaleX(1); opacity: 1; }
}

.main-nav a.active {
  color: var(--primary);
  background: rgba(61, 240, 181, 0.06);
}

.main-nav a.active::after {
  content: '';
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 2px;
  background: var(--primary);
  box-shadow: 0 0 8px rgba(61, 240, 181, 0.5);
  border-radius: 2px;
}

.header-cta {
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  border: 1px solid var(--border);
  color: var(--text);
  background: var(--surface);
  font-size: 18px;
  transition: all var(--transition);
}

.nav-toggle:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.nav-toggle.active {
  border-color: var(--primary);
  color: var(--primary);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 70vh;
  max-height: 88vh;
  display: flex;
  align-items: center;
  padding: 80px 0;
  overflow: hidden;
  background-image:
    linear-gradient(rgba(11, 17, 16, 0.2), var(--bg)),
    radial-gradient(ellipse at 20% 40%, rgba(61, 240, 181, 0.12), transparent 50%),
    url('/assets/images/backpic/hero.jpg');
  background-size: cover, cover, cover;
  background-position: center center;
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    120deg,
    rgba(255, 255, 255, 0.03) 0,
    rgba(255, 255, 255, 0.03) 1px,
    transparent 1px,
    transparent 28px
  );
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  width: 100%;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}

.hero-content {
  max-width: 620px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(11, 17, 16, 0.6);
  border: 1px solid rgba(61, 240, 181, 0.35);
  font-size: 13px;
  color: var(--primary);
  letter-spacing: 0.04em;
  margin-bottom: 24px;
  backdrop-filter: blur(4px);
}

.hero h1 {
  font-size: clamp(38px, 5.2vw, 58px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: 0.01em;
  margin-bottom: 20px;
  color: var(--text);
}

.hero h1 .highlight {
  color: var(--primary);
}

.hero-sub {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 460px;
  margin-bottom: 32px;
  line-height: 1.7;
}

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

.hero-trust {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.hero-trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
}

.hero-trust-item i {
  color: var(--primary);
  font-size: 15px;
}

.hero-visual {
  position: relative;
}

.hero-card {
  background: var(--surface);
  border-radius: 20px;
  padding: 14px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transform: rotate(1deg);
  transition: transform var(--transition), box-shadow var(--transition);
}

.hero-card:hover {
  transform: rotate(0deg) translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.hero-card img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: 12px;
}

.hero-card-caption {
  padding: 16px 8px 8px;
}

.hero-card-caption strong {
  display: block;
  font-size: 16px;
  margin-bottom: 4px;
}

.hero-card-caption span {
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== 登录指引 steps ===== */
.steps-section {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.steps-grid {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
  align-items: center;
}

.steps-list {
  display: flex;
  gap: 20px;
  position: relative;
}

.step-item {
  flex: 1;
  position: relative;
  padding: 24px 20px;
  background: rgba(11, 17, 16, 0.35);
  border: 1px solid var(--border);
  border-radius: 16px;
  transition: all var(--transition);
}

.step-item:hover {
  background: var(--surface-hover);
  border-color: rgba(61, 240, 181, 0.25);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.3);
}

.step-item::after {
  content: '';
  position: absolute;
  top: 52px;
  right: -21px;
  width: 21px;
  height: 1px;
  border-top: 1px dashed rgba(61, 240, 181, 0.35);
}

.step-item:last-child::after {
  display: none;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(61, 240, 181, 0.08);
  color: var(--primary);
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.step-item h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
}

.step-item p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

.steps-visual img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: 16px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.steps-footer {
  margin-top: 36px;
  border-top: 1px solid var(--border);
  padding-top: 24px;
}

.steps-footer a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  font-size: 15px;
  font-weight: 500;
  transition: gap var(--transition);
}

.steps-footer a:hover {
  gap: 12px;
  color: #6BFFCD;
}

/* ===== 会员权益 ===== */
.benefits-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  position: relative;
}

.benefit-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  transition: all var(--transition);
}

.benefit-card:hover {
  background: var(--surface-hover);
  border-color: rgba(61, 240, 181, 0.35);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.benefit-card .icon-circle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(61, 240, 181, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 16px;
}

.benefit-card h3 {
  font-size: 18px;
  font-weight: 600;
}

.benefit-value {
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.02em;
  line-height: 1.1;
}

.benefit-card p {
  font-size: 14px;
  color: var(--text-muted);
}

.benefit-new {
  position: absolute;
  top: 20px;
  right: 20px;
  background: var(--accent);
  color: #0B1110;
  font-size: 12px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  letter-spacing: 0.04em;
}

.benefits-more {
  text-align: right;
  margin-top: 20px;
}

.benefits-more a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 500;
  transition: gap var(--transition);
}

.benefits-more a:hover {
  gap: 12px;
  color: #6BFFCD;
}

/* ===== 任务进度 ===== */
.tasks-section {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.tasks-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: stretch;
}

.task-list-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

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

.task-info {
  flex: 1;
  min-width: 0;
}

.task-info h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.progress-track {
  height: 4px;
  background: rgba(238, 245, 240, 0.06);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 4px;
  transition: width 600ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.task-status {
  flex-shrink: 0;
}

.current-task-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: relative;
  overflow: hidden;
}

.current-task-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(61, 240, 181, 0.12), transparent 70%);
  pointer-events: none;
}

.current-task-card h3 {
  font-size: 20px;
  font-weight: 600;
}

.current-task-pct {
  font-family: var(--font-mono);
  font-size: 48px;
  font-weight: 700;
  line-height: 1;
  color: var(--primary);
  letter-spacing: 0.02em;
}

.current-task-card p {
  font-size: 14px;
  color: var(--text-muted);
}

.current-task-card .btn {
  align-self: flex-start;
}

/* ===== 最新资讯 ===== */
.news-wrap {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.news-card {
  display: flex;
  gap: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.news-card:hover {
  background: var(--surface-hover);
  border-color: rgba(61, 240, 181, 0.25);
  box-shadow: var(--shadow-hover);
}

.news-card:hover::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--primary);
}

.news-card-lg {
  flex-direction: row;
}

.news-card-lg .news-thumb {
  width: 280px;
  flex-shrink: 0;
}

.news-card-lg .news-thumb img {
  height: 180px;
  width: 100%;
  object-fit: cover;
  border-radius: 12px;
}

.news-card-sm {
  flex-direction: row;
  padding: 14px 20px;
}

.news-card-sm .news-thumb {
  width: 96px;
  flex-shrink: 0;
}

.news-card-sm .news-thumb img {
  width: 96px;
  height: 72px;
  object-fit: cover;
  border-radius: 8px;
}

.news-body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.news-body h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.4;
  transition: color var(--transition);
}

.news-body h3 a:hover {
  color: var(--primary);
}

.news-card-sm .news-body h3 {
  font-size: 15px;
  margin-bottom: 6px;
}

.news-card-lg .news-excerpt {
  font-size: 15px;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 14px;
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--text-muted);
}

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

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

.news-meta .detail {
  margin-left: auto;
  color: var(--primary);
  font-weight: 500;
}

.news-meta .detail:hover {
  color: #6BFFCD;
}

.news-empty {
  height: 240px;
  background: var(--surface);
  border: 1px dashed rgba(238, 245, 240, 0.15);
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  text-align: center;
  padding: 32px;
}

.news-empty .empty-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(238, 245, 240, 0.04);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 22px;
}

.news-empty strong {
  font-size: 16px;
  font-weight: 600;
}

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

/* ===== FAQ ===== */
.faq-wrap {
  max-width: 760px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-item:first-child {
  border-top: 1px solid var(--border);
}

.faq-question {
  width: 100%;
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  text-align: left;
  padding: 16px 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  transition: color var(--transition);
}

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

.faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 14px;
  transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1), background var(--transition), color var(--transition);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: #0B1110;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.7;
  transition: max-height 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.faq-item.open .faq-answer {
  max-height: 400px;
  padding-bottom: 20px;
}

/* ===== CTA ===== */
.cta-section {
  background: var(--surface);
  border-top: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 70% 50%, rgba(61, 240, 181, 0.15), transparent 60%);
  pointer-events: none;
}

.cta-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}

.cta-text h2 {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 8px;
}

.cta-text p {
  font-size: 14px;
  color: var(--text-muted);
}

/* ===== Footer ===== */
.site-footer {
  background: #080D0B;
  border-top: 1px solid var(--border);
  padding-top: 64px;
}

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

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

.footer-brand p {
  font-size: 13px;
  color: var(--text-muted);
  max-width: 260px;
  line-height: 1.8;
  margin-bottom: 16px;
}

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

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

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

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
}

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

.footer-col ul a {
  font-size: 13px;
  color: var(--text-muted);
  transition: color var(--transition);
}

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

.footer-col .contact-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.footer-col .contact-item i {
  color: var(--primary);
  width: 16px;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--text-muted);
}

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

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

/* ===== 响应式 ===== */
@media (max-width: 1199px) {
  .hero-inner {
    grid-template-columns: 1fr;
    max-width: 780px;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero-visual {
    display: none;
  }

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

  .steps-visual {
    max-width: 480px;
  }

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

@media (max-width: 767px) {
  .container {
    padding: 0 16px;
  }

  .header-inner {
    gap: 12px;
  }

  .brand-text {
    font-size: 15px;
    white-space: normal;
    line-height: 1.3;
  }

  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(11, 17, 16, 0.98);
    backdrop-filter: blur(8px);
    padding: 16px 24px 24px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 250ms cubic-bezier(0.2, 0.8, 0.2, 1);
    z-index: 99;
  }

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

  .main-nav ul {
    flex-direction: column;
    gap: 4px;
    align-items: stretch;
  }

  .main-nav a {
    display: block;
    padding: 12px 16px;
    border-radius: 8px;
    border-bottom: 1px solid var(--border);
  }

  .main-nav a::after {
    display: none !important;
  }

  .header-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    min-height: 60vh;
    align-items: flex-end;
    padding-bottom: 64px;
  }

  .hero h1 {
    font-size: clamp(30px, 8vw, 40px);
  }

  .hero-sub {
    font-size: 15px;
  }

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

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

  .hero-trust {
    gap: 12px;
  }

  .hero-trust-item {
    font-size: 13px;
  }

  .hero-trust-item.hide-mobile {
    display: none;
  }

  .steps-list {
    flex-direction: column;
    gap: 12px;
  }

  .step-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 16px;
  }

  .step-item::after {
    top: auto;
    right: auto;
    bottom: -13px;
    left: 52px;
    width: 1px;
    height: 13px;
    border-top: none;
    border-left: 1px dashed rgba(61, 240, 181, 0.35);
  }

  .step-item:last-child::after {
    display: none;
  }

  .step-number {
    width: 44px;
    height: 44px;
    font-size: 18px;
    margin-bottom: 0;
    flex-shrink: 0;
  }

  .step-item h3 {
    font-size: 16px;
  }

  .step-item p {
    font-size: 13px;
  }

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

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

  .news-card-lg {
    flex-direction: column;
    padding: 16px;
  }

  .news-card-lg .news-thumb {
    width: 100%;
  }

  .news-card-lg .news-thumb img {
    height: 160px;
  }

  .news-card-sm {
    padding: 12px 16px;
    gap: 14px;
  }

  .news-card-sm .news-thumb {
    width: 80px;
  }

  .news-card-sm .news-thumb img {
    width: 80px;
    height: 60px;
  }

  .news-card-sm .news-body h3 {
    font-size: 14px;
  }

  .cta-inner {
    flex-direction: column;
    align-items: flex-start;
  }

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

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .brand-text {
    font-size: 14px;
  }

  .brand-mark {
    width: 32px;
    height: 32px;
    font-size: 16px;
  }

  .section-head h2 {
    font-size: 24px;
  }

  .benefit-card {
    padding: 18px;
  }

  .benefit-value {
    font-size: 28px;
  }

  .current-task-card {
    padding: 24px;
  }

  .current-task-pct {
    font-size: 36px;
  }

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

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

/* roulang page: article */
:root {
  --bg: #0B1110;
  --surface: #121A16;
  --surface-hover: #18231E;
  --primary: #3DF0B5;
  --secondary: #C4FF3D;
  --accent: #FF3DA5;
  --text: #EEF5F0;
  --text-muted: #A4B0A9;
  --border: rgba(238, 245, 240, 0.08);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 18px 40px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(61, 240, 181, 0.35);
  --transition: 200ms cubic-bezier(0.2, 0.8, 0.2, 1);
  --font-sans: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", "SF Mono", monospace;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: #6BFFCD; }
button { font-family: inherit; cursor: pointer; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
@media (max-width: 767px) { .container { padding: 0 16px; } }

/* ===== 顶部霓虹线 ===== */
.site-header::before {
  content: "";
  display: block;
  height: 3px;
  background: linear-gradient(90deg, var(--primary) 0%, transparent 100%);
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
}

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 17, 16, 0.92);
  backdrop-filter: saturate(120%) blur(8px);
  -webkit-backdrop-filter: saturate(120%) blur(8px);
  border-bottom: 1px solid var(--border);
  height: 64px;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text) !important; flex-shrink: 0; }
.brand-mark {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #08130E;
  font-weight: 800;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.brand-text { font-size: 18px; font-weight: 700; letter-spacing: 0.01em; white-space: nowrap; }
.main-nav ul { display: flex; list-style: none; gap: 6px; }
.main-nav a {
  display: inline-block;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  position: relative;
  transition: color var(--transition), background var(--transition);
}
.main-nav a:hover { color: var(--primary); background: rgba(61, 240, 181, 0.06); }
.main-nav a.active {
  color: var(--primary);
  background: rgba(61, 240, 181, 0.06);
}
.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 16px; right: 16px; bottom: 2px;
  height: 2px;
  background: var(--primary);
  box-shadow: 0 0 8px rgba(61, 240, 181, 0.5);
  border-radius: 2px;
}
.header-cta .btn { margin-left: 8px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 14px;
  padding: 10px 18px;
  transition: all var(--transition);
  text-decoration: none;
}
.btn-primary { background: var(--primary); color: #08130E; }
.btn-primary:hover { background: #6BFFCD; color: #08130E; box-shadow: 0 0 20px rgba(61, 240, 181, 0.2); }
.btn-outline { background: transparent; color: var(--primary); border: 1px solid var(--primary); }
.btn-outline:hover { background: rgba(61, 240, 181, 0.08); color: #6BFFCD; }
.btn:active { transform: scale(0.98); }
.btn:focus-visible, a:focus-visible, button:focus-visible {
  outline: 2px dashed var(--primary);
  outline-offset: 3px;
}
.nav-toggle { display: none; background: none; border: none; color: var(--text); font-size: 22px; padding: 8px; border-radius: 6px; }
.nav-toggle:focus-visible { outline: 2px dashed var(--primary); outline-offset: 3px; }

@media (max-width: 991px) {
  .main-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 260px;
    height: 100vh;
    background: rgba(11, 17, 16, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 80px 20px 30px;
    transition: right 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
    z-index: 99;
    border-left: 1px solid var(--border);
  }
  .main-nav.open { right: 0; }
  .main-nav ul { flex-direction: column; gap: 8px; }
  .main-nav a { display: block; font-size: 16px; padding: 12px 16px; border-bottom: 1px solid var(--border); border-radius: 0; width: 100%; }
  .main-nav a.active::after { display: none; }
  .nav-toggle { display: block; z-index: 101; }
  .header-cta .btn { display: none; }
  .site-header::after {
    content: "";
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    pointer-events: none;
    transition: opacity 300ms;
    z-index: 98;
  }
  .site-header.nav-open::after { opacity: 1; pointer-events: auto; }
}
@media (max-width: 480px) {
  .brand-text { font-size: 15px; }
  .brand-mark { width: 32px; height: 32px; font-size: 16px; }
}

/* ===== 文章页主体 ===== */
.article-page {
  padding: 40px 0 80px;
}
.breadcrumb {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 32px;
}
.breadcrumb a { color: var(--text-muted); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { margin: 0 8px; color: rgba(164, 176, 169, 0.5); }
.breadcrumb .current { color: var(--primary); }

.article-header {
  max-width: 780px;
  margin: 0 auto 40px;
}
.article-header h1 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 0.01em;
  margin-bottom: 20px;
  color: var(--text);
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  font-size: 13px;
  color: var(--text-muted);
  align-items: center;
}
.article-meta .tag-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(61, 240, 181, 0.08);
  border: 1px solid rgba(61, 240, 181, 0.25);
}
.article-meta .meta-item { display: inline-flex; align-items: center; gap: 6px; }
.article-meta .meta-item i { color: var(--primary); font-size: 13px; opacity: 0.8; }

.article-body {
  max-width: 780px;
  margin: 0 auto;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text);
}
.article-body p { margin-bottom: 24px; }
.article-body h2 {
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 700;
  margin: 48px 0 16px;
  padding-left: 12px;
  border-left: 4px solid var(--primary);
  line-height: 1.3;
}
.article-body h3 {
  font-size: clamp(18px, 2vw, 21px);
  font-weight: 600;
  margin: 36px 0 12px;
  line-height: 1.4;
  color: var(--text);
}
.article-body blockquote {
  border-left: 3px solid var(--primary);
  background: rgba(61, 240, 181, 0.04);
  padding: 20px 24px;
  margin: 24px 0;
  border-radius: 0 12px 12px 0;
  color: var(--text-muted);
  font-style: normal;
}
.article-body blockquote p:last-child { margin-bottom: 0; }
.article-body ul, .article-body ol { margin: 0 0 24px 1.5em; line-height: 1.8; }
.article-body li { margin-bottom: 6px; }
.article-body li::marker { color: var(--primary); }
.article-body a { color: var(--primary); text-decoration: underline; text-decoration-color: rgba(61, 240, 181, 0.3); text-underline-offset: 4px; }
.article-body a:hover { text-decoration-color: var(--primary); }
.article-body img { border-radius: 12px; margin: 24px 0; box-shadow: var(--shadow-md); }
.article-body .img-caption {
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
  margin-top: -14px;
  margin-bottom: 24px;
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  border-radius: 12px;
  overflow: hidden;
  font-size: 14px;
}
.article-body table th {
  background: rgba(61, 240, 181, 0.08);
  color: var(--primary);
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid rgba(61, 240, 181, 0.2);
  font-weight: 600;
}
.article-body table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
}
.article-body table tr:last-child td { border-bottom: none; }
.article-body code {
  font-family: var(--font-mono);
  font-size: 14px;
  background: rgba(61, 240, 181, 0.08);
  color: var(--primary);
  padding: 2px 6px;
  border-radius: 4px;
}
.article-body pre {
  background: #0A0F0D;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  overflow-x: auto;
  margin: 24px 0;
}
.article-body pre code { background: none; padding: 0; color: var(--text); }

/* ===== 文章返回 + 推荐 ===== */
.article-footer-actions {
  max-width: 780px;
  margin: 48px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.article-footer-actions .back-link { font-size: 14px; font-weight: 500; color: var(--text-muted); }
.article-footer-actions .back-link i { margin-right: 6px; }
.article-footer-actions .back-link:hover { color: var(--primary); }

.related-posts {
  max-width: 780px;
  margin: 48px auto 0;
}
.related-posts h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text);
  padding-left: 12px;
  border-left: 4px solid var(--primary);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.related-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.related-card:hover {
  background: var(--surface-hover);
  border-color: rgba(61, 240, 181, 0.35);
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.related-card .thumb { width: 100%; height: 120px; object-fit: cover; }
.related-card .info { padding: 14px 16px; flex: 1; display: flex; flex-direction: column; gap: 8px; }
.related-card .info h4 { font-size: 14px; font-weight: 600; line-height: 1.5; color: var(--text); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-card .info h4 a { color: var(--text); transition: color var(--transition); }
.related-card .info h4 a:hover { color: var(--primary); }
.related-card .info .time { font-size: 12px; color: var(--text-muted); font-family: var(--font-mono); }

/* ===== 404 未找到 ===== */
.not-found-box {
  max-width: 780px;
  margin: 80px auto;
  background: var(--surface);
  border: 1px dashed rgba(238, 245, 240, 0.15);
  border-radius: var(--radius-md);
  padding: 60px 40px;
  text-align: center;
}
.not-found-box i { font-size: 40px; color: var(--accent); margin-bottom: 16px; }
.not-found-box h2 { font-size: 22px; margin-bottom: 12px; color: var(--text); }
.not-found-box p { color: var(--text-muted); margin-bottom: 24px; }

/* ===== Footer ===== */
.site-footer {
  background: #080D0B;
  border-top: 1px solid var(--border);
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .brand { margin-bottom: 16px; }
.footer-brand p { font-size: 13px; color: var(--text-muted); line-height: 1.8; margin-bottom: 16px; }
.footer-icp { font-size: 12px; color: rgba(164, 176, 169, 0.6); line-height: 1.8; }
.footer-icp a { color: rgba(164, 176, 169, 0.8); }
.footer-icp a:hover { color: var(--primary); }
.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { font-size: 13px; color: var(--text-muted); transition: color var(--transition), padding-left var(--transition); }
.footer-col ul a:hover { color: var(--primary); padding-left: 4px; }
.contact-item { font-size: 13px; color: var(--text-muted); margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
.contact-item i { color: var(--primary); font-size: 13px; width: 16px; }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: rgba(164, 176, 169, 0.7);
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom a { color: rgba(164, 176, 169, 0.8); }
.footer-bottom a:hover { color: var(--primary); }

@media (max-width: 991px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 767px) {
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .related-grid { grid-template-columns: 1fr; }
  .article-page { padding: 24px 0 60px; }
  .breadcrumb { margin-bottom: 20px; font-size: 12px; }
  .article-body { font-size: 15px; line-height: 1.8; }
  .related-posts { margin-top: 36px; }
  .article-footer-actions { flex-direction: column; gap: 12px; align-items: flex-start; }
}

@media (max-width: 480px) {
  .article-header h1 { font-size: 24px; line-height: 1.35; }
  .article-meta { gap: 8px 12px; }
  .article-body { font-size: 15px; }
  .article-body blockquote { padding: 16px 18px; }
  .related-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .related-card .info { padding: 12px; }
  .related-card .info h4 { font-size: 13px; }
}

/* roulang page: category1 */
:root {
  --bg: #0B1110;
  --surface: #121A16;
  --surface-hover: #18231E;
  --primary: #3DF0B5;
  --secondary: #C4FF3D;
  --accent: #FF3DA5;
  --text: #EEF5F0;
  --text-muted: #A4B0A9;
  --border: rgba(238, 245, 240, 0.08);
  --radius: 16px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 18px 40px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(61, 240, 181, 0.35);
  --font-cn: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", "SF Mono", monospace;
  --header-h: 64px;
  --space-section: clamp(64px, 8vw, 120px);
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-cn);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
}
a:hover {
  color: #6BFFCD;
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}
input, textarea {
  font-family: inherit;
}
ul, ol {
  list-style: none;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 15px;
  line-height: 1.4;
  transition: all 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
  border: 1px solid transparent;
}
.btn:active {
  transform: translateY(1px) scale(0.98);
}
.btn:focus-visible {
  outline: 2px dashed var(--primary);
  outline-offset: 3px;
}
.btn-primary {
  background: var(--primary);
  color: #0B1110;
  font-weight: 700;
}
.btn-primary:hover {
  background: #6BFFCD;
  color: #0B1110;
  box-shadow: 0 0 24px rgba(61, 240, 181, 0.2);
}
.btn-outline {
  background: transparent;
  color: var(--text);
  border-color: rgba(238, 245, 240, 0.2);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(61, 240, 181, 0.06);
}
.btn-lg {
  padding: 16px 34px;
  font-size: 16px;
  border-radius: var(--radius);
}
.section {
  padding-top: var(--space-section);
  padding-bottom: var(--space-section);
}
.section-head {
  margin-bottom: 40px;
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--primary);
  background: rgba(61, 240, 181, 0.08);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 16px;
  border: 1px solid rgba(61, 240, 181, 0.15);
}
.section-tag::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  display: inline-block;
}
.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.01em;
}
.section-sub {
  color: var(--text-muted);
  font-size: 16px;
  margin-top: 12px;
  max-width: 720px;
  line-height: 1.7;
}
.text-muted {
  color: var(--text-muted);
}
/* ===== header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  z-index: 1000;
  background: rgba(11, 17, 16, 0.92);
  backdrop-filter: saturate(120%) blur(8px);
  -webkit-backdrop-filter: saturate(120%) blur(8px);
  border-bottom: 1px solid var(--border);
}
.site-header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), transparent 70%);
  z-index: 1;
}
.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), #1EA67B);
  color: #0B1110;
  font-weight: 800;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px rgba(61, 240, 181, 0.3);
}
.brand-text {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text);
  white-space: nowrap;
}
.brand-text:hover {
  color: var(--text);
}
.main-nav ul {
  display: flex;
  gap: 6px;
  align-items: center;
}
.main-nav a {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  position: relative;
  transition: all 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.main-nav a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: width 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.main-nav a:hover {
  color: var(--primary);
}
.main-nav a:hover::after {
  width: 60%;
}
.main-nav a.active {
  color: var(--primary);
  background: rgba(61, 240, 181, 0.06);
}
.main-nav a.active::after {
  width: 60%;
  box-shadow: 0 0 8px rgba(61, 240, 181, 0.6);
}
.header-cta .btn {
  padding: 9px 18px;
}
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
}
.nav-toggle i {
  font-size: 18px;
}
/* ===== page hero ===== */
.page-hero {
  position: relative;
  padding: calc(var(--header-h) + 64px) 0 72px;
  min-height: 420px;
  display: flex;
  align-items: center;
  background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11,17,16,0.85) 0%, rgba(11,17,16,0.75) 40%, var(--bg) 100%);
  z-index: 1;
}
.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(61, 240, 181, 0.12), transparent 50%),
    repeating-linear-gradient(135deg, rgba(255,255,255,0.03) 0px, rgba(255,255,255,0.03) 2px, transparent 2px, transparent 12px);
  z-index: 1;
}
.page-hero .hero-content {
  position: relative;
  z-index: 2;
  max-width: 780px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  border: 1px solid rgba(61, 240, 181, 0.3);
  background: rgba(11, 17, 16, 0.6);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  color: var(--primary);
  letter-spacing: 0.04em;
  margin-bottom: 24px;
}
.hero-badge i {
  font-size: 12px;
}
.page-hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: 0.01em;
  margin-bottom: 20px;
}
.page-hero h1 .highlight {
  color: var(--primary);
}
.page-hero p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-muted);
  max-width: 640px;
  margin-bottom: 28px;
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.hero-trust {
  display: flex;
  gap: 24px;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}
.hero-trust span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
}
.hero-trust i {
  color: var(--primary);
  font-size: 14px;
}
/* ===== breadcrumb ===== */
.breadcrumb-wrap {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.breadcrumb {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.breadcrumb a {
  color: var(--text-muted);
}
.breadcrumb a:hover {
  color: var(--primary);
}
.breadcrumb .sep {
  color: rgba(238, 245, 240, 0.3);
}
.breadcrumb .current {
  color: var(--text);
}
/* ===== intro section ===== */
.intro-section {
  background: var(--bg);
  position: relative;
}
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.intro-text .section-title {
  margin-bottom: 20px;
}
.intro-text p {
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}
.intro-text .feature-list {
  margin-top: 28px;
}
.intro-text .feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  font-size: 15px;
  line-height: 1.6;
}
.intro-text .feature-list li i {
  color: var(--primary);
  font-size: 14px;
  margin-top: 4px;
  flex-shrink: 0;
}
.intro-visual {
  position: relative;
}
.intro-visual img {
  width: 100%;
  border-radius: var(--radius-lg);
  object-fit: cover;
  box-shadow: var(--shadow);
}
.intro-visual .float-badge {
  position: absolute;
  top: 20px;
  right: -10px;
  background: rgba(11, 17, 16, 0.9);
  border: 1px solid rgba(61, 240, 181, 0.3);
  border-radius: 12px;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  gap: 10px;
  backdrop-filter: blur(8px);
}
.intro-visual .float-badge i {
  color: var(--primary);
  font-size: 18px;
}
.float-badge .badge-num {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
}
.float-badge .badge-label {
  font-size: 12px;
  color: var(--text-muted);
}
/* ===== steps section ===== */
.steps-section {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  position: relative;
}
.step-item {
  padding: 40px 30px;
  position: relative;
}
.step-item:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 64px;
  right: 0;
  width: 100%;
  height: 1px;
  background: repeating-linear-gradient(90deg, rgba(61,240,181,0.4) 0px, rgba(61,240,181,0.4) 8px, transparent 8px, transparent 16px);
  z-index: 1;
}
.step-num {
  display: inline-flex;
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: rgba(61, 240, 181, 0.08);
  border: 1px solid rgba(61, 240, 181, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 18px;
}
.step-item h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: 0.01em;
}
.step-item p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.7;
  max-width: 280px;
}
.steps-cta {
  margin-top: 28px;
  text-align: center;
  font-size: 14px;
  color: var(--text-muted);
}
.steps-cta a {
  color: var(--primary);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.steps-cta a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}
/* ===== content alternating sections ===== */
.content-block {
  padding: var(--space-section) 0;
}
.content-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 80px;
}
.content-grid.reversed .content-visual {
  order: 2;
}
.content-grid.reversed .content-detail {
  order: 1;
}
.content-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.content-visual img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.content-visual:hover img {
  transform: scale(1.03);
}
.content-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(11, 17, 16, 0.6) 100%);
}
.content-detail h3 {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 18px;
}
.content-detail h3 .accent-line {
  display: inline-block;
  width: 4px;
  height: 20px;
  background: var(--primary);
  border-radius: 2px;
  margin-right: 10px;
  vertical-align: middle;
}
.content-detail p {
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}
.content-detail ul {
  margin: 20px 0;
}
.content-detail ul li {
  padding: 6px 0;
  font-size: 15px;
  line-height: 1.6;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.content-detail ul li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--primary);
  flex-shrink: 0;
  margin-top: 10px;
}
.content-detail .btn {
  margin-top: 18px;
}
/* ===== FAQ ===== */
.faq-section {
  background: var(--bg);
}
.faq-container {
  max-width: 760px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--border);
}
.faq-question {
  width: 100%;
  min-height: 56px;
  padding: 18px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  text-align: left;
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
  transition: color 0.2s;
}
.faq-question:hover {
  color: var(--primary);
}
.faq-toggle {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid rgba(61, 240, 181, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 14px;
  transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  flex-shrink: 0;
}
.faq-question[aria-expanded="true"] .faq-toggle {
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0.2, 0.8, 0.2, 1), padding 0.3s;
  padding-left: 0;
}
.faq-answer p {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.8;
  padding-bottom: 20px;
  padding-right: 32px;
}
.faq-answer.open {
  max-height: 400px;
}
/* ===== CTA ===== */
.cta-section {
  background: var(--surface);
  border-top: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 60%;
  height: 100%;
  background: radial-gradient(circle at 70% 50%, rgba(61, 240, 181, 0.12), transparent 70%);
}
.cta-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 40px;
  padding: 64px 0;
  position: relative;
  z-index: 1;
}
.cta-left h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 12px;
}
.cta-left p {
  color: var(--text-muted);
  font-size: 15px;
  max-width: 520px;
}
/* ===== footer ===== */
.site-footer {
  background: #080D0B;
  border-top: 1px solid var(--border);
  padding-top: 64px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand .brand {
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: 13px;
  line-height: 1.8;
  color: var(--text-muted);
  max-width: 280px;
  margin-bottom: 20px;
}
.footer-icp {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.8;
}
.footer-icp a {
  color: var(--text-muted);
}
.footer-icp a:hover {
  color: var(--primary);
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 18px;
  letter-spacing: 0.02em;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul a {
  font-size: 13px;
  color: var(--text-muted);
  transition: color 0.2s, padding-left 0.2s;
}
.footer-col ul a:hover {
  color: var(--primary);
  padding-left: 4px;
}
.contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.contact-item i {
  color: var(--primary);
  font-size: 14px;
  width: 16px;
}
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 10px;
}
.footer-bottom a {
  color: var(--text-muted);
}
.footer-bottom a:hover {
  color: var(--primary);
}
/* ===== back to top ===== */
.back-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(61, 240, 181, 0.1);
  border: 1px solid rgba(61, 240, 181, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 16px;
  z-index: 999;
  backdrop-filter: blur(8px);
  transition: all 0.2s;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
}
.back-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-top:hover {
  background: rgba(61, 240, 181, 0.2);
  box-shadow: 0 0 20px rgba(61, 240, 181, 0.15);
}
/* ===== responsive ===== */
@media (max-width: 1199px) {
  .container {
    max-width: 92%;
    padding-left: 16px;
    padding-right: 16px;
  }
}
@media (max-width: 767px) {
  body {
    font-size: 15px;
  }
  .container {
    max-width: 100%;
    padding-left: 16px;
    padding-right: 16px;
  }
  .site-header .header-cta {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: rgba(11, 17, 16, 0.96);
    backdrop-filter: blur(12px);
    padding: 16px 20px 24px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
    z-index: 999;
  }
  .main-nav.open {
    transform: translateY(0);
  }
  .main-nav ul {
    flex-direction: column;
    gap: 8px;
  }
  .main-nav a {
    padding: 12px 16px;
    font-size: 15px;
    border-radius: 8px;
  }
  .main-nav a::after {
    display: none;
  }
  .main-nav a.active {
    background: rgba(61, 240, 181, 0.08);
  }
  .page-hero {
    min-height: 480px;
    padding: calc(var(--header-h) + 48px) 0 48px;
  }
  .page-hero h1 {
    font-size: clamp(28px, 8vw, 38px);
  }
  .hero-trust {
    flex-direction: column;
    gap: 12px;
  }
  .intro-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .steps-grid {
    grid-template-columns: 1fr;
  }
  .step-item:not(:last-child)::after {
    top: auto;
    right: auto;
    bottom: 0;
    left: 40px;
    width: 1px;
    height: 24px;
    background: repeating-linear-gradient(180deg, rgba(61,240,181,0.4) 0px, rgba(61,240,181,0.4) 6px, transparent 6px, transparent 12px);
  }
  .content-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    margin-bottom: 56px;
  }
  .content-grid.reversed .content-visual {
    order: 1;
  }
  .content-grid.reversed .content-detail {
    order: 2;
  }
  .content-visual img {
    height: 220px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .cta-inner {
    flex-direction: column;
    padding: 48px 0;
    text-align: center;
  }
  .cta-left p {
    margin: 0 auto;
  }
  .back-top {
    bottom: 20px;
    right: 20px;
  }
}
@media (max-width: 480px) {
  .brand-text {
    font-size: 15px;
  }
  .brand-mark {
    width: 32px;
    height: 32px;
    font-size: 17px;
  }
  .btn-lg {
    padding: 14px 26px;
    font-size: 15px;
    width: 100%;
    justify-content: center;
  }
  .hero-actions {
    flex-direction: column;
  }
  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }
  .content-detail h3 .accent-line {
    display: inline-block;
  }
}
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* roulang page: category2 */
:root {
      --bg: #0B1110;
      --surface: #121A16;
      --surface-hover: #18231E;
      --primary: #3DF0B5;
      --primary-bright: #6BFFCD;
      --secondary: #C4FF3D;
      --accent: #FF3DA5;
      --text: #EEF5F0;
      --text-muted: #A4B0A9;
      --border: rgba(238, 245, 240, 0.08);
      --radius-card: 16px;
      --radius-large: 20px;
      --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.35);
      --shadow-hover: 0 18px 40px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(61, 240, 181, 0.35);
      --font-cn: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-mono: "JetBrains Mono", "Roboto Mono", "SF Mono", monospace;
      --transition: 200ms cubic-bezier(0.2, 0.8, 0.2, 1);
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-cn);
      background: var(--bg);
      color: var(--text);
      font-size: 16px;
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      padding-top: 64px;
    }

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

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

    ul,
    ol {
      list-style: none;
    }

    button,
    input {
      font-family: inherit;
      border: none;
      outline: none;
      background: none;
    }

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

    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
      background: rgba(11, 17, 16, 0.92);
      backdrop-filter: saturate(120%) blur(8px);
      -webkit-backdrop-filter: saturate(120%) blur(8px);
      border-bottom: 1px solid var(--border);
    }

    .site-header::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: linear-gradient(90deg, var(--primary), transparent 80%);
      pointer-events: none;
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 64px;
      gap: 24px;
    }

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

    .brand-mark {
      width: 36px;
      height: 36px;
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, rgba(61, 240, 181, 0.2), rgba(61, 240, 181, 0.06));
      border: 1px solid rgba(61, 240, 181, 0.4);
      color: var(--primary);
      font-weight: 800;
      font-size: 18px;
    }

    .brand-text {
      font-weight: 700;
      font-size: 18px;
      letter-spacing: 0.02em;
      white-space: nowrap;
    }

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

    .main-nav a {
      display: inline-block;
      padding: 8px 16px;
      border-radius: 8px;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-muted);
      position: relative;
      transition: color var(--transition), background var(--transition);
    }

    .main-nav a::after {
      content: "";
      position: absolute;
      left: 16px;
      right: 16px;
      bottom: 2px;
      height: 2px;
      border-radius: 2px;
      background: var(--primary);
      transform: scaleX(0);
      transform-origin: left;
      transition: transform var(--transition);
    }

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

    .main-nav a:hover::after {
      transform: scaleX(1);
    }

    .main-nav a.active {
      color: var(--primary);
      background: rgba(61, 240, 181, 0.06);
    }

    .main-nav a.active::after {
      transform: scaleX(1);
      box-shadow: 0 0 12px rgba(61, 240, 181, 0.6);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border-radius: 8px;
      font-weight: 700;
      font-size: 15px;
      padding: 10px 20px;
      cursor: pointer;
      transition: background var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition);
      line-height: 1.2;
    }

    .btn-primary {
      background: var(--primary);
      color: #0B1110;
    }

    .btn-primary:hover {
      background: var(--primary-bright);
      box-shadow: 0 0 24px rgba(61, 240, 181, 0.3);
    }

    .btn-outline {
      border: 1px solid rgba(61, 240, 181, 0.5);
      color: var(--primary);
    }

    .btn-outline:hover {
      background: rgba(61, 240, 181, 0.08);
      box-shadow: 0 0 16px rgba(61, 240, 181, 0.15);
    }

    .btn:active {
      transform: translateY(1px) scale(0.98);
    }

    .btn:focus-visible,
    .main-nav a:focus-visible,
    .faq-question:focus-visible,
    .footer-col a:focus-visible,
    .event-more:focus-visible {
      outline: 2px dashed var(--primary);
      outline-offset: 3px;
    }

    .nav-toggle {
      display: none;
      width: 40px;
      height: 40px;
      border-radius: 8px;
      border: 1px solid var(--border);
      color: var(--text);
      font-size: 18px;
      cursor: pointer;
      align-items: center;
      justify-content: center;
      transition: background var(--transition), color var(--transition);
    }

    .nav-toggle:hover {
      background: rgba(61, 240, 181, 0.08);
      color: var(--primary);
    }

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

    /* ===== Hero ===== */
    .cat-hero {
      position: relative;
      min-height: 52vh;
      display: flex;
      align-items: center;
      background: url("/assets/images/backpic/back-1.webp") center center / cover no-repeat;
      isolation: isolate;
      overflow: hidden;
    }

    .cat-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(11, 17, 16, 0.88) 0%, rgba(11, 17, 16, 0.6) 50%, rgba(11, 17, 16, 0.3) 100%);
      z-index: -1;
    }

    .cat-hero::after {
      content: "";
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 20% 60%, rgba(61, 240, 181, 0.12), transparent 55%);
      z-index: -1;
      pointer-events: none;
    }

    .cat-hero-inner {
      padding: 80px 0;
      max-width: 680px;
    }

    .cat-hero .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 14px;
      border-radius: 999px;
      background: rgba(18, 26, 22, 0.8);
      border: 1px solid rgba(61, 240, 181, 0.4);
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 24px;
    }

    .cat-hero h1 {
      font-size: clamp(38px, 6vw, 58px);
      font-weight: 800;
      line-height: 1.15;
      letter-spacing: 0.01em;
      margin-bottom: 20px;
    }

    .cat-hero .hero-desc {
      font-size: 17px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 32px;
      max-width: 560px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-bottom: 36px;
    }

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

    .trust-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: var(--text-muted);
      padding: 6px 14px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border);
    }

    .trust-item i {
      color: var(--primary);
      font-size: 13px;
    }

    /* ===== 板块通用 ===== */
    .section {
      padding: clamp(64px, 8vw, 100px) 0;
      position: relative;
    }

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

    .section-head {
      margin-bottom: 40px;
      max-width: 720px;
    }

    .section-head .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 0.1em;
      color: var(--primary);
      margin-bottom: 12px;
      text-transform: uppercase;
    }

    .section-head h2 {
      font-size: clamp(28px, 4vw, 40px);
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 12px;
    }

    .section-head p {
      color: var(--text-muted);
      font-size: 16px;
      line-height: 1.75;
    }

    /* ===== 当前活动主卡 ===== */
    .event-current-card {
      position: relative;
      border-radius: var(--radius-large);
      overflow: hidden;
      min-height: 380px;
      display: flex;
      align-items: flex-end;
      background: url("/assets/images/backpic/back-2.png") center center / cover no-repeat;
      isolation: isolate;
      box-shadow: var(--shadow-card);
    }

    .event-current-card::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(11, 17, 16, 0.92) 0%, rgba(11, 17, 16, 0.65) 60%, rgba(11, 17, 16, 0.25) 100%);
      z-index: -1;
    }

    .event-current-inner {
      padding: 48px;
      max-width: 560px;
    }

    .event-status {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 5px 14px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .event-status.live {
      background: var(--primary);
      color: #0B1110;
    }

    .event-status.live .dot {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: #0B1110;
      animation: pulse 1.6s ease-in-out infinite;
    }

    @keyframes pulse {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.4; }
    }

    .event-current-title {
      font-size: clamp(28px, 4vw, 40px);
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 10px;
    }

    .event-current-time {
      font-family: var(--font-mono);
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .event-current-time i {
      color: var(--primary);
    }

    .event-current-desc {
      color: var(--text-muted);
      font-size: 16px;
      line-height: 1.7;
      margin-bottom: 28px;
    }

    /* ===== 过往活动 ===== */
    .events-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .event-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    }

    .event-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(61, 240, 181, 0.35);
    }

    .event-cover {
      position: relative;
      height: 190px;
      overflow: hidden;
    }

    .event-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 400ms cubic-bezier(0.2, 0.8, 0.2, 1);
    }

    .event-card:hover .event-cover img {
      transform: scale(1.04);
    }

    .event-cover .event-status {
      position: absolute;
      top: 16px;
      left: 16px;
      margin: 0;
      background: rgba(11, 17, 16, 0.82);
      color: var(--text);
      border: 1px solid var(--border);
      backdrop-filter: blur(6px);
    }

    .event-body {
      padding: 24px;
    }

    .event-body h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 8px;
      line-height: 1.4;
    }

    .event-meta {
      display: flex;
      align-items: center;
      gap: 10px;
      font-family: var(--font-mono);
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 12px;
    }

    .event-meta i {
      color: var(--primary);
    }

    .event-body p {
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.65;
    }

    .event-more-wrap {
      text-align: center;
      margin-top: 40px;
    }

    /* ===== 参与流程 ===== */
    .steps-band {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
      counter-reset: step;
    }

    .step-item {
      position: relative;
      padding: 32px 24px;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
    }

    .step-item:hover {
      border-color: rgba(61, 240, 181, 0.4);
      background: var(--surface-hover);
      box-shadow: 0 8px 28px rgba(0, 0, 0, 0.3);
    }

    .step-num {
      font-family: var(--font-mono);
      font-size: 32px;
      font-weight: 800;
      color: var(--primary);
      background: rgba(61, 240, 181, 0.08);
      width: 56px;
      height: 56px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      position: relative;
      z-index: 1;
    }

    .step-item h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-item p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* ===== 权益亮点 ===== */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 32px;
      transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
    }

    .feature-card:hover {
      border-color: rgba(61, 240, 181, 0.35);
      background: var(--surface-hover);
      box-shadow: var(--shadow-hover);
    }

    .feature-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: rgba(61, 240, 181, 0.1);
      border: 1px solid rgba(61, 240, 181, 0.3);
      color: var(--primary);
      font-size: 20px;
      margin-bottom: 20px;
    }

    .feature-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
    }

    .feature-card p {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* ===== FAQ ===== */
    .faq-wrap {
      max-width: 760px;
      margin: 0 auto;
    }

    .faq-item {
      border-bottom: 1px solid var(--border);
    }

    .faq-question {
      width: 100%;
      min-height: 56px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 16px 0;
      cursor: pointer;
      text-align: left;
      font-size: 16px;
      font-weight: 600;
      color: var(--text);
      transition: color var(--transition);
    }

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

    .faq-icon {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      border: 1px solid rgba(61, 240, 181, 0.5);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 14px;
      flex-shrink: 0;
      transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1), background var(--transition), color var(--transition);
    }

    .faq-item.open .faq-icon {
      transform: rotate(45deg);
      background: var(--primary);
      color: #0B1110;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
    }

    .faq-answer-inner {
      padding: 0 0 20px;
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* ===== CTA ===== */
    .cta-banner {
      background: var(--surface);
      border-radius: var(--radius-large);
      padding: 56px 48px;
      position: relative;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 32px;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-card);
    }

    .cta-banner::after {
      content: "";
      position: absolute;
      right: -80px;
      top: 50%;
      width: 300px;
      height: 300px;
      background: radial-gradient(circle, rgba(61, 240, 181, 0.18), transparent 65%);
      transform: translateY(-50%);
      pointer-events: none;
    }

    .cta-banner h2 {
      font-size: clamp(28px, 3vw, 36px);
      font-weight: 700;
      line-height: 1.25;
      margin-bottom: 10px;
    }

    .cta-banner p {
      color: var(--text-muted);
      font-size: 15px;
    }

    .cta-banner .btn {
      height: 56px;
      padding: 0 36px;
      border-radius: 16px;
      font-size: 16px;
      flex-shrink: 0;
      position: relative;
      z-index: 1;
    }

    /* ===== Footer ===== */
    .site-footer {
      background: #080D0B;
      border-top: 1px solid var(--border);
      padding: 60px 0 0;
      margin-top: clamp(64px, 8vw, 100px);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 40px;
      padding-bottom: 40px;
    }

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

    .footer-brand p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 16px;
      max-width: 280px;
    }

    .footer-icp {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.8;
    }

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

    .footer-icp a:hover,
    .footer-bottom a:hover {
      color: var(--primary);
    }

    .footer-col h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 16px;
      letter-spacing: 0.05em;
    }

    .footer-col ul {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-col ul a {
      font-size: 14px;
      color: var(--text-muted);
      transition: color var(--transition), padding-left var(--transition);
    }

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

    .contact-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 12px;
    }

    .contact-item i {
      color: var(--primary);
      width: 16px;
      text-align: center;
    }

    .footer-bottom {
      border-top: 1px solid var(--border);
      padding: 20px 0;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      font-size: 13px;
      color: var(--text-muted);
      flex-wrap: wrap;
    }

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

    @media (max-width: 1024px) {
      .features-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .header-inner {
        gap: 12px;
      }
      .main-nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(11, 17, 16, 0.97);
        border-bottom: 1px solid var(--border);
        padding: 16px 24px;
        transform: translateY(-12px);
        opacity: 0;
        visibility: hidden;
        transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
        backdrop-filter: blur(12px);
      }
      .main-nav.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
      }
      .main-nav ul {
        flex-direction: column;
        gap: 4px;
      }
      .main-nav a {
        display: block;
        padding: 12px 16px;
        font-size: 16px;
        border-radius: 10px;
      }
      .nav-toggle {
        display: flex;
      }
      .header-cta .btn {
        padding: 8px 14px;
        font-size: 14px;
      }
      .events-grid {
        grid-template-columns: 1fr;
      }
      .steps-band {
        grid-template-columns: 1fr;
      }
      .step-item {
        padding: 24px;
      }
      .cta-banner {
        flex-direction: column;
        text-align: center;
        padding: 40px 28px;
      }
      .cta-banner .btn {
        width: 100%;
      }
      .event-current-inner {
        padding: 32px;
      }
    }

    @media (max-width: 520px) {
      body {
        font-size: 15px;
        padding-top: 56px;
      }
      .header-inner {
        height: 56px;
      }
      .brand-text {
        font-size: 15px;
      }
      .brand-mark {
        width: 30px;
        height: 30px;
        font-size: 15px;
      }
      .container {
        padding: 0 16px;
      }
      .header-cta .btn {
        display: none;
      }
      .features-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }
      .hero-trust .trust-item:nth-child(n+2) {
        display: none;
      }
      .cat-hero-inner {
        padding: 60px 0;
      }
      .cat-hero h1 {
        font-size: 32px;
      }
      .event-current-inner {
        padding: 24px;
      }
      .event-current-title {
        font-size: 26px;
      }
      .section {
        padding: 56px 0;
      }
    }