/* roulang page: index */
/* ========== 设计变量 ========== */
:root {
  --bg-deep: #070b14;
  --bg-dark: #0b1220;
  --bg-card: #121c30;
  --bg-hover: #1a2740;
  --primary: #00e0ff;
  --primary-glow: rgba(0, 224, 255, .35);
  --accent: #00ffc8;
  --accent-glow: rgba(0, 255, 200, .25);
  --text-main: #e8f1ff;
  --text-sub: #8a9bc0;
  --text-weak: #5a6b8a;
  --border: #1e2a40;
  --border-light: #2a3a55;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --shadow-card: 0 8px 32px rgba(0, 0, 0, .35);
  --shadow-glow: 0 0 24px rgba(0, 224, 255, .15);
  --trans: .3s ease;
  --max-width: 1200px;
  --header-h: 70px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-main);
  background: var(--bg-deep);
  min-height: 100vh;
  overflow-x: hidden;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--trans);
}

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

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

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

ul,
ol {
  list-style: none;
}

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

.container-wide {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ========== 导航 ========== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(7, 11, 20, .92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 24px rgba(0, 0, 0, .3);
}

.header::after {
  content: "";
  display: block;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), var(--accent), transparent);
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 1px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-main);
  white-space: nowrap;
}

.logo .logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 900;
  color: #0b1220;
  box-shadow: 0 0 16px var(--primary-glow);
}

.logo span.gradient-text {
  background: linear-gradient(90deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  display: inline-block;
  padding: 8px 18px;
  border-radius: 30px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-sub);
  transition: all var(--trans);
  border: 1px solid transparent;
  position: relative;
}

.nav-link:hover {
  color: var(--text-main);
  background: rgba(0, 224, 255, .08);
  border-color: rgba(0, 224, 255, .25);
}

.nav-link.active {
  color: var(--primary);
  background: rgba(0, 224, 255, .1);
  border-color: rgba(0, 224, 255, .3);
  box-shadow: 0 0 16px rgba(0, 224, 255, .15);
  text-shadow: 0 0 12px rgba(0, 224, 255, .4);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
  box-shadow: 0 0 8px var(--primary);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 22px;
  border-radius: 30px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #0b1220;
  font-size: 14px;
  font-weight: 700;
  transition: all var(--trans);
  box-shadow: 0 0 18px rgba(0, 224, 255, .25);
}

.nav-cta:hover {
  color: #0b1220;
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(0, 224, 255, .4);
}

.nav-cta:active {
  transform: translateY(0);
}

/* 移动端汉堡 */
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  border: 1px solid var(--border);
  cursor: pointer;
  position: relative;
  z-index: 1001;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  transition: all var(--trans);
}

.nav-toggle span::before {
  transform: translateY(-7px);
}

.nav-toggle span::after {
  transform: translateY(7px);
}

/* ========== Hero 首屏 ========== */
.hero {
  position: relative;
  min-height: 620px;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, rgba(7, 11, 20, .92), rgba(11, 18, 32, .75)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  padding: calc(var(--header-h) + 60px) 0 80px;
  border-bottom: 1px solid var(--border);
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(ellipse at 80% 20%, rgba(0, 224, 255, .12), transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  border-radius: 30px;
  background: rgba(0, 224, 255, .1);
  border: 1px solid rgba(0, 224, 255, .25);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .5px;
  margin-bottom: 24px;
}

.hero-badge i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 1.6s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .5; transform: scale(1.4); }
}

.hero-title {
  font-size: 52px;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: 1px;
  margin-bottom: 20px;
  background: linear-gradient(90deg, #fff 30%, var(--primary) 70%, var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-sub);
  margin-bottom: 36px;
  max-width: 560px;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 40px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 32px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 700;
  transition: all var(--trans);
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #0b1220;
  box-shadow: 0 4px 24px rgba(0, 224, 255, .3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 224, 255, .45);
  color: #0b1220;
}

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

.btn-outline {
  border-color: rgba(0, 224, 255, .4);
  color: var(--primary);
  background: transparent;
}

.btn-outline:hover {
  background: rgba(0, 224, 255, .1);
  border-color: var(--primary);
  transform: translateY(-2px);
  color: var(--primary);
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  padding-top: 8px;
}

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

.hero-stat .num {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-main);
  display: block;
  line-height: 1.2;
}

.hero-stat .label {
  font-size: 13px;
  color: var(--text-weak);
  margin-top: 4px;
}

.hero-stat .num i {
  font-style: normal;
  color: var(--primary);
}

/* ========== 数据统计板块 ========== */
.stats {
  padding: 70px 0;
  background: var(--bg-dark);
  position: relative;
}

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

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  text-align: center;
  transition: all var(--trans);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: opacity var(--trans);
}

.stat-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-light);
  box-shadow: var(--shadow-card);
}

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

.stat-card .stat-icon {
  font-size: 32px;
  margin-bottom: 12px;
}

.stat-card .stat-number {
  font-size: 36px;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1.1;
}

.stat-card .stat-number span {
  color: var(--primary);
}

.stat-card .stat-label {
  font-size: 14px;
  color: var(--text-sub);
  margin-top: 8px;
}

/* ========== 分类入口 ========== */
.categories {
  padding: 80px 0;
  background: var(--bg-deep);
}

.section-header {
  text-align: center;
  margin-bottom: 50px;
}

.section-kicker {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 10px;
}

.section-title {
  font-size: 34px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
  line-height: 1.3;
}

.section-desc {
  font-size: 15px;
  color: var(--text-sub);
  max-width: 600px;
  margin: 0 auto;
}

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

.category-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-card);
  transition: all var(--trans);
  display: block;
}

.category-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 224, 255, .4);
  box-shadow: 0 12px 40px rgba(0, 0, 0, .4), 0 0 24px rgba(0, 224, 255, .08);
}

.category-card .card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}

.category-card .card-body {
  padding: 24px;
}

.category-card .card-tag {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 20px;
  background: rgba(0, 224, 255, .12);
  border: 1px solid rgba(0, 224, 255, .25);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 12px;
}

.category-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.category-card p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 16px;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}

.card-link i {
  transition: transform var(--trans);
}

.card-link:hover i {
  transform: translateX(4px);
}

/* ========== 核心说明 ========== */
.about {
  padding: 80px 0;
  background: var(--bg-dark);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

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

.about-visual img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}

.about-visual .about-badge {
  position: absolute;
  bottom: 20px;
  left: 20px;
  padding: 12px 20px;
  background: rgba(7, 11, 20, .85);
  border: 1px solid rgba(0, 224, 255, .3);
  border-radius: 12px;
  backdrop-filter: blur(8px);
}

.about-visual .about-badge span {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--primary);
}

.about-visual .about-badge small {
  color: var(--text-sub);
  font-size: 13px;
}

.about-text h2 {
  font-size: 30px;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.3;
  margin-bottom: 16px;
}

.about-text p {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.8;
  margin-bottom: 24px;
}

.about-features {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.about-feature {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all var(--trans);
}

.about-feature:hover {
  border-color: rgba(0, 224, 255, .3);
  box-shadow: var(--shadow-glow);
}

.about-feature .ft-icon {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  border-radius: 10px;
  background: rgba(0, 224, 255, .12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.about-feature .ft-text h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 2px;
}

.about-feature .ft-text p {
  font-size: 13px;
  color: var(--text-sub);
  margin: 0;
  line-height: 1.5;
}

/* ========== 最新资讯列表 ========== */
.latest {
  padding: 80px 0;
  background: var(--bg-deep);
}

.latest-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.latest-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.latest-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all var(--trans);
}

.latest-item:hover {
  border-color: rgba(0, 224, 255, .35);
  background: var(--bg-hover);
  transform: translateX(4px);
  box-shadow: var(--shadow-glow);
}

.latest-item .latest-category {
  flex-shrink: 0;
  padding: 3px 12px;
  border-radius: 20px;
  background: rgba(0, 224, 255, .1);
  border: 1px solid rgba(0, 224, 255, .2);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.latest-item .latest-title {
  flex: 1;
  color: var(--text-main);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.5;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.latest-item:hover .latest-title {
  color: var(--primary);
}

.latest-item .latest-date {
  flex-shrink: 0;
  font-size: 12px;
  color: var(--text-weak);
}

.latest-empty {
  text-align: center;
  padding: 40px;
  color: var(--text-sub);
  background: var(--bg-card);
  border: 1px dashed var(--border-light);
  border-radius: var(--radius-lg);
  font-size: 15px;
}

/* ========== 精选推荐 ========== */
.featured {
  padding: 80px 0;
  background: var(--bg-dark);
}

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

.featured-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--trans);
}

.featured-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card);
  border-color: rgba(0, 224, 255, .3);
}

.featured-card .fc-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  position: relative;
}

.featured-card .fc-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 4px 14px;
  border-radius: 20px;
  background: rgba(0, 224, 255, .85);
  color: #0b1220;
  font-size: 12px;
  font-weight: 700;
  z-index: 2;
}

.featured-card .fc-body {
  padding: 22px;
}

.featured-card .fc-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
  line-height: 1.4;
}

.featured-card .fc-body p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 16px;
}

.featured-card .fc-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--text-weak);
}

/* ========== 流程说明 ========== */
.process {
  padding: 80px 0;
  background: var(--bg-deep);
}

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

.process-item {
  text-align: center;
  padding: 30px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  position: relative;
  transition: all var(--trans);
}

.process-item:hover {
  border-color: rgba(0, 224, 255, .3);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.process-step {
  width: 44px;
  height: 44px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #0b1220;
  font-size: 18px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px rgba(0, 224, 255, .3);
}

.process-item h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.process-item p {
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.7;
}

.process-item::after {
  content: "→";
  position: absolute;
  top: 50%;
  right: -18px;
  transform: translateY(-50%);
  color: var(--primary);
  font-size: 20px;
  font-weight: 700;
  opacity: .5;
  display: none;
}

/* ========== FAQ ========== */
.faq {
  padding: 80px 0;
  background: var(--bg-dark);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all var(--trans);
}

.faq-item:hover {
  border-color: rgba(0, 224, 255, .25);
}

.faq-item summary {
  padding: 18px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 50px;
  transition: color var(--trans);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
  transition: all var(--trans);
}

.faq-item[open] summary::after {
  content: "−";
  color: var(--accent);
}

.faq-item[open] summary {
  color: var(--primary);
}

.faq-item .faq-answer {
  padding: 0 24px 18px;
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.8;
  border-top: 1px solid var(--border);
  margin-top: 0;
  padding-top: 14px;
}

/* ========== CTA ========== */
.cta {
  padding: 80px 0;
  background: linear-gradient(135deg, rgba(0, 224, 255, .06), rgba(0, 255, 200, .06)), var(--bg-deep);
  border-top: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 224, 255, .15), transparent 60%);
  pointer-events: none;
}

.cta-content {
  text-align: center;
  position: relative;
  z-index: 2;
  max-width: 600px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: 34px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 16px;
}

.cta-content p {
  font-size: 15px;
  color: var(--text-sub);
  margin-bottom: 30px;
  line-height: 1.8;
}

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

/* ========== 页脚 ========== */
.footer {
  background: #05080f;
  border-top: 1px solid var(--border);
  padding: 50px 0 30px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-brand .logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 900;
  color: #0b1220;
  box-shadow: 0 0 14px rgba(0, 224, 255, .2);
}

.footer-brand .fb-text {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-main);
}

.footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 14px;
  color: var(--text-sub);
  transition: all var(--trans);
}

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

.footer-copyright {
  text-align: center;
  padding-top: 30px;
  margin-top: 40px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-weak);
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.footer-copyright a {
  color: var(--text-sub);
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  :root {
    --max-width: 100%;
  }

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

  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .featured-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

@media (max-width: 768px) {
  body {
    font-size: 15px;
  }

  .header-inner {
    padding: 0 16px;
  }

  .nav {
    position: fixed;
    top: var(--header-h);
    right: 0;
    width: 280px;
    height: calc(100vh - var(--header-h));
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    background: rgba(7, 11, 20, .98);
    padding: 24px 20px;
    border-left: 1px solid var(--border);
    transform: translateX(100%);
    transition: transform var(--trans);
    z-index: 999;
    box-shadow: -8px 0 30px rgba(0, 0, 0, .4);
    overflow-y: auto;
  }

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

  .nav-link {
    padding: 14px 18px;
    border-radius: 10px;
    font-size: 16px;
  }

  .nav-cta {
    justify-content: center;
    margin-top: 8px;
  }

  .nav-toggle {
    display: block;
  }

  .nav-toggle.active span {
    background: transparent;
  }

  .nav-toggle.active span::before {
    transform: rotate(45deg) translate(0, 0);
  }

  .nav-toggle.active span::after {
    transform: rotate(-45deg) translate(0, 0);
  }

  .hero {
    min-height: 520px;
    padding-top: calc(var(--header-h) + 40px);
    padding-bottom: 60px;
  }

  .hero-title {
    font-size: 36px;
  }

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

  .section-title {
    font-size: 28px;
  }

  .process-item::after {
    display: block;
    top: auto;
    bottom: -22px;
    left: 50%;
    transform: translateX(-50%) rotate(90deg);
  }

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

  .footer-links {
    justify-content: center;
  }
}

@media (max-width: 520px) {
  .container,
  .container-wide,
  .header-inner {
    padding: 0 14px;
  }

  .hero-title {
    font-size: 28px;
  }

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

  .btn {
    width: 100%;
  }

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

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

  .about-visual img {
    height: 260px;
  }

  .latest-item {
    flex-wrap: wrap;
    gap: 8px;
  }

  .latest-item .latest-title {
    white-space: normal;
    width: 100%;
    order: 3;
  }

  .latest-item .latest-category {
    order: 1;
  }

  .latest-item .latest-date {
    order: 2;
    margin-left: auto;
  }

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

  .footer-links {
    gap: 14px;
  }
}

/* 焦点可访问性 */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 4px;
}

/* roulang page: category1 */
:root {
            --bg-primary: #0b101b;
            --bg-secondary: #111927;
            --bg-elevated: #162030;
            --bg-card: rgba(255, 255, 255, 0.03);
            --bg-card-hover: rgba(255, 255, 255, 0.06);
            --neon-primary: #00e5a0;
            --neon-secondary: #00b4ff;
            --neon-glow: rgba(0, 229, 160, 0.35);
            --neon-glow-blue: rgba(0, 180, 255, 0.25);
            --text-primary: #eef3fc;
            --text-secondary: #a3b0cc;
            --text-muted: #62718f;
            --border-color: rgba(255, 255, 255, 0.08);
            --border-glow: rgba(0, 229, 160, 0.25);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.25);
            --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 24px rgba(0, 229, 160, 0.1);
            --content-width: 1200px;
            --space-section: 96px;
            --header-height: 72px;
            --font-stack: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 80px;
        }

        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.7;
            background: var(--bg-primary);
            color: var(--text-primary);
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }

        ul,
        ol {
            list-style: none;
        }

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

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

        /* ===== Header 导航 ===== */
        .header {
            position: sticky;
            top: 0;
            z-index: 200;
            background: rgba(11, 16, 27, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
        }

        .header-inner {
            max-width: var(--content-width);
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            padding: 0 24px;
            position: relative;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            letter-spacing: 0.02em;
            color: var(--text-primary);
            white-space: nowrap;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--neon-primary), var(--neon-secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 1.2rem;
            color: #0b101b;
            box-shadow: 0 0 16px rgba(0, 229, 160, 0.3);
            flex-shrink: 0;
        }

        .gradient-text {
            background: linear-gradient(120deg, var(--neon-primary), var(--neon-secondary));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        .nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-link {
            padding: 10px 16px;
            border-radius: 10px;
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            position: relative;
            transition: all 0.25s ease;
        }

        .nav-link:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
        }

        .nav-link.active {
            color: var(--neon-primary);
            background: rgba(0, 229, 160, 0.08);
            box-shadow: inset 0 -2px 0 var(--neon-primary), 0 0 14px rgba(0, 229, 160, 0.12);
        }

        .nav-cta {
            padding: 9px 20px;
            border-radius: 24px;
            background: linear-gradient(135deg, var(--neon-primary), var(--neon-secondary));
            color: #0b101b;
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 0 18px rgba(0, 229, 160, 0.25);
            transition: all 0.25s ease;
            white-space: nowrap;
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 229, 160, 0.35);
            color: #0b101b;
        }

        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            background: transparent;
            border: 1px solid var(--border-color);
            border-radius: 10px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            position: relative;
        }

        .nav-toggle span,
        .nav-toggle span::before,
        .nav-toggle span::after {
            content: "";
            display: block;
            width: 18px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            position: absolute;
            left: 50%;
            margin-left: -9px;
            transition: all 0.3s ease;
        }

        .nav-toggle span {
            top: 50%;
            margin-top: -1px;
        }

        .nav-toggle span::before {
            top: -6px;
        }

        .nav-toggle span::after {
            top: 6px;
        }

        .nav-toggle.open span {
            background: transparent;
        }

        .nav-toggle.open span::before {
            top: 0;
            transform: rotate(45deg);
        }

        .nav-toggle.open span::after {
            top: 0;
            transform: rotate(-45deg);
        }

        /* ===== Hero ===== */
        .page-hero {
            position: relative;
            padding: 120px 0 100px;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 16, 27, 0.92) 0%, rgba(11, 16, 27, 0.78) 45%, rgba(11, 16, 27, 0.55) 100%);
        }

        .page-hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 229, 160, 0.1);
            border: 1px solid rgba(0, 229, 160, 0.25);
            border-radius: 30px;
            padding: 7px 18px;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--neon-primary);
            letter-spacing: 0.04em;
            margin-bottom: 22px;
        }

        .hero-tag::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--neon-primary);
            box-shadow: 0 0 8px var(--neon-primary);
        }

        .page-hero h1 {
            font-size: clamp(2.2rem, 5vw, 3.6rem);
            font-weight: 900;
            line-height: 1.15;
            letter-spacing: -0.01em;
            margin-bottom: 18px;
        }

        .page-hero h1 .gradient-text {
            display: inline-block;
        }

        .page-hero .hero-desc {
            font-size: 1.08rem;
            line-height: 1.8;
            color: var(--text-secondary);
            max-width: 640px;
            margin-bottom: 34px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 52px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 0.95rem;
            cursor: pointer;
            border: none;
            transition: all 0.28s ease;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--neon-primary), #00c489);
            color: #0b101b;
            box-shadow: 0 6px 24px rgba(0, 229, 160, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(0, 229, 160, 0.4);
            color: #0b101b;
        }

        .btn-ghost {
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-primary);
            border: 1px solid rgba(255, 255, 255, 0.15);
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.3);
            transform: translateY(-3px);
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .hero-stat {
            display: flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 12px 20px;
            font-size: 0.9rem;
        }

        .hero-stat i {
            color: var(--neon-primary);
            font-size: 1.1rem;
        }

        .hero-stat strong {
            font-size: 1.3rem;
            font-weight: 800;
            margin-right: 2px;
        }

        .hero-stat .stat-label {
            color: var(--text-secondary);
            font-size: 0.82rem;
        }

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

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

        .section-tag {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.14em;
            text-transform: uppercase;
            color: var(--neon-primary);
            background: rgba(0, 229, 160, 0.08);
            border: 1px solid rgba(0, 229, 160, 0.18);
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 14px;
        }

        .section-header h2 {
            font-size: clamp(1.8rem, 3.4vw, 2.5rem);
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 14px;
        }

        .section-header p {
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.7;
        }

        /* ===== 核心指标 ===== */
        .stats-section {
            padding: 72px 0 24px;
            position: relative;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-card {
            background: var(--bg-elevated);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 30px 24px;
            text-align: center;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .stat-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--neon-primary), var(--neon-secondary));
            opacity: 0.6;
            transition: opacity 0.3s;
        }

        .stat-card:hover {
            transform: translateY(-5px);
            border-color: rgba(0, 229, 160, 0.3);
            box-shadow: var(--shadow-glow);
        }

        .stat-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: rgba(0, 229, 160, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            color: var(--neon-primary);
            font-size: 1.3rem;
        }

        .stat-card .stat-num {
            font-size: 2.1rem;
            font-weight: 900;
            line-height: 1.1;
            background: linear-gradient(120deg, var(--neon-primary), var(--neon-secondary));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        .stat-card .stat-name {
            margin-top: 8px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* ===== 使用流程 ===== */
        .process-section {
            padding: var(--space-section) 0;
        }

        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }

        .step-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            position: relative;
            transition: all 0.3s ease;
        }

        .step-item:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-glow);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
        }

        .step-item::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: 22px;
            right: 22px;
            font-size: 2rem;
            font-weight: 900;
            color: rgba(255, 255, 255, 0.06);
            line-height: 1;
        }

        .step-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(0, 229, 160, 0.15), rgba(0, 180, 255, 0.15));
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--neon-primary);
            font-size: 1.2rem;
            margin-bottom: 18px;
        }

        .step-item h3 {
            font-size: 1.08rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        .step-line {
            display: none;
        }

        /* ===== 指南卡片 ===== */
        .guides-section {
            background: var(--bg-secondary);
            padding: var(--space-section) 0;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .guides-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
        }

        .guide-card {
            background: var(--bg-elevated);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all 0.35s ease;
            display: flex;
            flex-direction: column;
        }

        .guide-card:hover {
            transform: translateY(-6px);
            border-color: rgba(0, 229, 160, 0.3);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4), var(--shadow-glow);
        }

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

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

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

        .guide-card-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(11, 16, 27, 0.6) 100%);
        }

        .guide-card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .guide-card-tag {
            align-self: flex-start;
            font-size: 0.76rem;
            font-weight: 600;
            color: var(--neon-primary);
            background: rgba(0, 229, 160, 0.08);
            border: 1px solid rgba(0, 229, 160, 0.2);
            padding: 4px 12px;
            border-radius: 16px;
            margin-bottom: 12px;
        }

        .guide-card h3 {
            font-size: 1.12rem;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .guide-card p {
            font-size: 0.87rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 18px;
            flex: 1;
        }

        .guide-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid var(--border-color);
            padding-top: 14px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .guide-card-footer i {
            color: var(--neon-primary);
            font-size: 0.85rem;
        }

        /* ===== 功能场景 ===== */
        .feature-section {
            padding: var(--space-section) 0;
        }

        .feature-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
            margin-bottom: 80px;
        }

        .feature-block:last-child {
            margin-bottom: 0;
        }

        .feature-block.reverse {
            direction: rtl;
        }

        .feature-block.reverse > * {
            direction: ltr;
        }

        .feature-media {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
        }

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

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

        .feature-media::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(0, 229, 160, 0.08), transparent 60%);
            pointer-events: none;
        }

        .feature-content h2 {
            font-size: 1.7rem;
            font-weight: 800;
            margin-bottom: 14px;
            line-height: 1.3;
        }

        .feature-content p {
            color: var(--text-secondary);
            margin-bottom: 18px;
            font-size: 0.95rem;
            line-height: 1.75;
        }

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

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 0.92rem;
            color: var(--text-primary);
        }

        .feature-list i {
            color: var(--neon-primary);
            margin-top: 3px;
            flex-shrink: 0;
        }

        .feature-list span {
            color: var(--text-secondary);
        }

        /* ===== 最新指引 ===== */
        .latest-section {
            background: var(--bg-secondary);
            padding: var(--space-section) 0;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .latest-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .latest-item {
            background: var(--bg-elevated);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            display: flex;
            gap: 20px;
            align-items: center;
            transition: all 0.3s ease;
        }

        .latest-item:hover {
            border-color: var(--border-glow);
            background: rgba(255, 255, 255, 0.05);
            transform: translateX(4px);
        }

        .latest-date {
            font-size: 0.8rem;
            color: var(--neon-primary);
            background: rgba(0, 229, 160, 0.08);
            border: 1px solid rgba(0, 229, 160, 0.15);
            padding: 4px 12px;
            border-radius: 16px;
            white-space: nowrap;
            align-self: flex-start;
            margin-top: 2px;
        }

        .latest-content {
            flex: 1;
        }

        .latest-content h3 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .latest-content p {
            font-size: 0.84rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .latest-arrow {
            color: var(--text-muted);
            font-size: 1rem;
            transition: all 0.3s ease;
        }

        .latest-item:hover .latest-arrow {
            color: var(--neon-primary);
            transform: translateX(4px);
        }

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

        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .faq-item:hover {
            border-color: var(--border-glow);
        }

        .faq-item.active {
            border-color: var(--border-glow);
            background: rgba(0, 229, 160, 0.03);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            padding: 20px 24px;
            cursor: pointer;
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1rem;
            text-align: left;
            transition: all 0.25s ease;
        }

        .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: rgba(0, 229, 160, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--neon-primary);
            font-size: 0.85rem;
            flex-shrink: 0;
            transition: transform 0.35s ease, background 0.25s;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: var(--neon-primary);
            color: #0b101b;
        }

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

        .faq-answer-inner {
            padding: 0 24px 22px;
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.75;
            border-top: 1px solid transparent;
        }

        .faq-item.active .faq-answer-inner {
            border-top-color: var(--border-color);
            padding-top: 16px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 60px 0 var(--space-section);
        }

        .cta-box {
            background: linear-gradient(135deg, #0d1b2b, #09131f);
            border: 1px solid rgba(0, 229, 160, 0.18);
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: "";
            position: absolute;
            top: -50%;
            left: -20%;
            width: 70%;
            height: 200%;
            background: radial-gradient(circle, rgba(0, 229, 160, 0.12), transparent 65%);
            pointer-events: none;
        }

        .cta-box::after {
            content: "";
            position: absolute;
            bottom: -60%;
            right: -15%;
            width: 60%;
            height: 200%;
            background: radial-gradient(circle, rgba(0, 180, 255, 0.1), transparent 65%);
            pointer-events: none;
        }

        .cta-box h2 {
            font-size: 1.9rem;
            font-weight: 800;
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }

        .cta-box p {
            color: var(--text-secondary);
            font-size: 1rem;
            max-width: 540px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 1;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        /* ===== Footer ===== */
        .footer {
            border-top: 1px solid var(--border-color);
            background: var(--bg-secondary);
            padding: 48px 0 24px;
        }

        .footer-inner {
            max-width: var(--content-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 24px;
            margin-bottom: 30px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .footer-brand .logo-icon {
            width: 36px;
            height: 36px;
            font-size: 1rem;
            border-radius: 10px;
        }

        .fb-text {
            font-size: 1.1rem;
            font-weight: 800;
        }

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

        .footer-links a {
            padding: 8px 14px;
            font-size: 0.86rem;
            color: var(--text-secondary);
            border-radius: 8px;
            transition: all 0.2s ease;
        }

        .footer-links a:hover {
            color: var(--neon-primary);
            background: rgba(0, 229, 160, 0.06);
        }

        .footer-copyright {
            max-width: var(--content-width);
            margin: 0 auto;
            padding: 20px 24px 0;
            border-top: 1px solid var(--border-color);
            text-align: center;
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            :root {
                --space-section: 72px;
            }

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

            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }

            .guides-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .feature-block {
                gap: 36px;
            }
        }

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

            .nav {
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(11, 16, 27, 0.97);
                flex-direction: column;
                align-items: flex-start;
                padding: 16px;
                gap: 4px;
                border-bottom: 1px solid var(--border-color);
                display: none;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
            }

            .nav.open {
                display: flex;
            }

            .nav-link,
            .nav-cta {
                width: 100%;
                border-radius: 10px;
            }

            .nav-toggle {
                display: flex;
            }

            .page-hero {
                padding: 80px 0 70px;
            }

            .hero-stats {
                flex-direction: column;
                align-items: flex-start;
            }

            .hero-stat {
                width: 100%;
            }

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

            .feature-block,
            .feature-block.reverse {
                grid-template-columns: 1fr;
                gap: 32px;
                direction: ltr;
            }

            .feature-media img {
                height: 240px;
            }

            .latest-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }

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

        @media (max-width: 520px) {
            :root {
                --space-section: 56px;
            }

            .container {
                padding: 0 16px;
            }

            .page-hero h1 {
                font-size: 1.9rem;
            }

            .hero-desc {
                font-size: 0.95rem;
            }

            .stats-grid,
            .guides-grid {
                grid-template-columns: 1fr;
            }

            .section-header {
                margin-bottom: 40px;
            }

            .section-header h2 {
                font-size: 1.55rem;
            }

            .cta-box {
                padding: 40px 24px;
            }

            .cta-box h2 {
                font-size: 1.5rem;
            }

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

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

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

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

            .footer-links a {
                padding: 6px 10px;
                font-size: 0.82rem;
            }
        }

        /* focus 状态 */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--neon-primary);
            outline-offset: 2px;
            border-radius: 6px;
        }

/* roulang page: article */
:root {
  --bg: #070b14;
  --bg-soft: #0c1422;
  --panel: #101b2d;
  --panel-light: #172238;
  --line: rgba(148, 184, 220, .12);
  --neon: #00e5ff;
  --neon-2: #9b6bff;
  --green: #22c55e;
  --yellow: #f5b942;
  --text: #e4ebf5;
  --text-soft: #90a5c0;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 18px 44px rgba(0, 0, 0, .4);
  --transition: .25s ease;
}
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font-family: inherit;
  cursor: pointer;
}
.container {
  width: min(1200px, 92%);
  margin: 0 auto;
}
.container-sm {
  width: min(860px, 92%);
  margin: 0 auto;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .85rem 1.8rem;
  border: 0;
  border-radius: 999px;
  font-size: .98rem;
  font-weight: 600;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  will-change: transform;
}
.btn-primary {
  background: linear-gradient(135deg, var(--neon), var(--neon-2));
  color: #061018;
  box-shadow: 0 0 22px rgba(0, 229, 255, .25);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 34px rgba(0, 229, 255, .4);
}
.btn-ghost {
  background: transparent;
  color: var(--neon);
  border: 1px solid rgba(0, 229, 255, .4);
}
.btn-ghost:hover {
  background: rgba(0, 229, 255, .08);
  border-color: var(--neon);
  transform: translateY(-2px);
}

/* ===== 导航 ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(7, 11, 20, .92);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}
.header::after {
  content: "";
  display: block;
  height: 2px;
  width: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 229, 255, .65), rgba(155, 107, 255, .5), transparent);
}
.header-inner {
  width: min(1280px, 94%);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  font-size: 1.35rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: .02em;
}
.logo-icon {
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  background: linear-gradient(135deg, var(--neon), var(--neon-2));
  border-radius: 13px;
  display: grid;
  place-items: center;
  font-weight: 900;
  font-size: 1.35rem;
  color: #061018;
  box-shadow: 0 0 28px rgba(0, 229, 255, .3);
}
.gradient-text {
  background: linear-gradient(90deg, var(--neon), var(--neon-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.nav {
  display: flex;
  align-items: center;
  gap: 2.1rem;
}
.nav-link {
  font-size: .98rem;
  font-weight: 500;
  color: var(--text-soft);
  position: relative;
  padding: .6rem .1rem;
  transition: color var(--transition);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--neon), var(--neon-2));
  box-shadow: 0 0 14px rgba(0, 229, 255, .6);
  transition: width var(--transition);
}
.nav-link:hover,
.nav-link.active {
  color: #fff;
}
.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}
.nav-cta {
  background: linear-gradient(135deg, var(--neon), var(--neon-2));
  color: #061018;
  font-weight: 700;
  font-size: .92rem;
  padding: .62rem 1.35rem;
  border-radius: 999px;
  transition: transform var(--transition), box-shadow var(--transition);
}
.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 26px rgba(0, 229, 255, .4);
}
.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  width: 40px;
  height: 40px;
  position: relative;
  z-index: 1002;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: #fff;
  position: absolute;
  left: 9px;
  transition: all .3s ease;
}
.nav-toggle span {
  top: 19px;
}
.nav-toggle span::before {
  top: -7px;
}
.nav-toggle span::after {
  top: 7px;
}
.nav-toggle.active span {
  background: transparent;
}
.nav-toggle.active span::before {
  transform: rotate(45deg);
  top: 0;
}
.nav-toggle.active span::after {
  transform: rotate(-45deg);
  top: 0;
}

/* ===== 文章页首屏 ===== */
.article-hero {
  position: relative;
  padding: 5.5rem 0 4.5rem;
  background-size: cover;
  background-position: center;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.article-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 11, 20, .88), rgba(7, 11, 20, .94) 60%, var(--bg));
}
.article-hero .container {
  position: relative;
  z-index: 2;
}
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .5rem;
  font-size: .92rem;
  color: var(--text-soft);
  margin-bottom: 2rem;
}
.breadcrumb a {
  color: var(--neon);
  transition: color var(--transition);
}
.breadcrumb a:hover {
  color: #fff;
}
.breadcrumb .sep {
  color: rgba(255, 255, 255, .3);
}
.article-title-block {
  max-width: 860px;
}
.article-title-block h1 {
  font-size: clamp(1.9rem, 4vw, 3.1rem);
  line-height: 1.3;
  font-weight: 800;
  color: #fff;
  letter-spacing: .01em;
  margin-bottom: 1.2rem;
}
.article-title-block .lead {
  font-size: 1.12rem;
  color: var(--text-soft);
  max-width: 720px;
  line-height: 1.8;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.8rem;
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-size: .9rem;
  padding: .42rem 1rem;
  background: rgba(255, 255, 255, .04);
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text-soft);
}
.meta-item strong {
  color: #d7e4f5;
  font-weight: 600;
}

/* ===== 文章主体 ===== */
.article-main {
  padding: 4rem 0 5rem;
}
.article-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 2.5rem;
  align-items: start;
}
.article-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(1.5rem, 3vw, 2.6rem);
  box-shadow: var(--shadow);
}
.article-body {
  color: var(--text);
  font-size: 1.06rem;
  line-height: 1.9;
}
.article-body h2 {
  font-size: 1.65rem;
  color: #fff;
  margin: 2.2rem 0 1rem;
  padding-left: 1rem;
  border-left: 4px solid var(--neon);
  line-height: 1.4;
}
.article-body h3 {
  font-size: 1.3rem;
  color: #fff;
  margin: 1.8rem 0 .8rem;
}
.article-body p {
  margin-bottom: 1.2rem;
}
.article-body ul,
.article-body ol {
  margin: 1rem 0 1.4rem;
  padding-left: 1.5rem;
}
.article-body li {
  margin-bottom: .6rem;
}
.article-body a {
  color: var(--neon);
  border-bottom: 1px solid rgba(0, 229, 255, .3);
  transition: border-color var(--transition);
}
.article-body a:hover {
  border-color: var(--neon);
}
.article-body blockquote {
  border-left: 3px solid var(--neon-2);
  background: rgba(155, 107, 255, .08);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 1.2rem 1.5rem;
  margin: 1.6rem 0;
  color: #d3dff0;
}
.article-body img {
  border-radius: var(--radius);
  margin: 1.8rem 0;
  box-shadow: var(--shadow);
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
}
.article-body th,
.article-body td {
  border: 1px solid var(--line);
  padding: .75rem 1rem;
  text-align: left;
}
.article-body th {
  background: var(--panel-light);
  color: #fff;
  font-weight: 600;
}
.article-bottom {
  margin-top: 2.5rem;
  padding-top: 1.8rem;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
}
.tag {
  display: inline-block;
  padding: .35rem .95rem;
  background: rgba(0, 229, 255, .08);
  border: 1px solid rgba(0, 229, 255, .22);
  border-radius: 999px;
  font-size: .85rem;
  color: var(--neon);
  font-weight: 500;
}
.not-found {
  text-align: center;
  padding: 4rem 1rem;
}
.not-found h2 {
  font-size: 2.2rem;
  color: #fff;
  margin-bottom: 1rem;
}
.not-found p {
  color: var(--text-soft);
  margin-bottom: 2rem;
}

/* ===== 侧边栏 ===== */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
}
.side-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.side-card h3 {
  font-size: 1.06rem;
  color: #fff;
  margin-bottom: 1.2rem;
  display: flex;
  align-items: center;
  gap: .6rem;
}
.side-card h3::before {
  content: "";
  width: 4px;
  height: 18px;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--neon), var(--neon-2));
}
.side-link {
  display: block;
  padding: .7rem .6rem;
  margin-bottom: .2rem;
  border-radius: var(--radius-sm);
  color: var(--text-soft);
  font-size: .98rem;
  transition: background var(--transition), color var(--transition), padding-left var(--transition);
  border-left: 2px solid transparent;
}
.side-link:hover {
  background: rgba(0, 229, 255, .05);
  color: #fff;
  padding-left: 1.1rem;
  border-left-color: var(--neon);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.side-list {
  display: flex;
  flex-direction: column;
  gap: .65rem;
}
.side-list a {
  font-size: .95rem;
  color: var(--text-soft);
  transition: color var(--transition);
  line-height: 1.5;
}
.side-list a:hover {
  color: var(--neon);
}

/* ===== 相关推荐 ===== */
.related-section {
  padding: 0 0 5.5rem;
}
.section-head {
  text-align: center;
  margin-bottom: 2.8rem;
}
.section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  color: #fff;
  letter-spacing: .02em;
}
.section-head p {
  color: var(--text-soft);
  margin-top: .6rem;
  font-size: 1.02rem;
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.related-card {
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.related-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
  border-color: rgba(0, 229, 255, .3);
}
.card-img {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}
.card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.related-card:hover .card-img img {
  transform: scale(1.05);
}
.card-body {
  padding: 1.4rem 1.5rem 1.7rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: .6rem;
}
.card-body h3 {
  font-size: 1.2rem;
  color: #fff;
  font-weight: 700;
}
.card-body p {
  color: var(--text-soft);
  font-size: .96rem;
  line-height: 1.7;
  flex: 1;
}
.badge {
  display: inline-flex;
  align-self: flex-start;
  padding: .25rem .85rem;
  background: rgba(155, 107, 255, .12);
  border: 1px solid rgba(155, 107, 255, .25);
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 600;
  color: #c7a5ff;
}

/* ===== FAQ ===== */
.faq-section {
  padding: 5.5rem 0;
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.faq-container {
  max-width: 820px;
}
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.faq-item {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem 1.6rem;
  cursor: pointer;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.faq-item:hover {
  border-color: rgba(0, 229, 255, .3);
}
.faq-item h3 {
  font-size: 1.06rem;
  color: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-weight: 600;
  line-height: 1.5;
}
.faq-item h3::after {
  content: "+";
  flex: 0 0 auto;
  font-size: 1.7rem;
  font-weight: 300;
  color: var(--neon);
  line-height: 1;
  transition: transform .3s ease;
}
.faq-item.open h3::after {
  transform: rotate(45deg);
}
.faq-item p {
  max-height: 0;
  overflow: hidden;
  color: var(--text-soft);
  font-size: .98rem;
  line-height: 1.8;
  margin: 0;
  transition: max-height .3s ease, margin .3s ease, padding .3s ease;
}
.faq-item.open p {
  max-height: 400px;
  margin-top: .8rem;
  padding-top: .4rem;
  border-top: 1px solid var(--line);
}

/* ===== CTA ===== */
.cta-section {
  padding: 5.5rem 0;
}
.cta-box {
  position: relative;
  background: linear-gradient(135deg, rgba(0, 229, 255, .08), rgba(155, 107, 255, .1));
  border: 1px solid rgba(0, 229, 255, .2);
  border-radius: calc(var(--radius) + 8px);
  padding: 3.5rem 2rem;
  text-align: center;
  overflow: hidden;
}
.cta-box::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(600px 200px at 50% 0%, rgba(0, 229, 255, .12), transparent);
}
.cta-box h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  color: #fff;
  margin-bottom: .8rem;
  position: relative;
}
.cta-box p {
  color: var(--text-soft);
  max-width: 560px;
  margin: 0 auto 2rem;
  position: relative;
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  position: relative;
}

/* ===== 页脚 ===== */
.footer {
  background: #060a12;
  border-top: 1px solid var(--line);
  padding: 3.5rem 0 2rem;
}
.footer-inner {
  width: min(1200px, 92%);
  margin: 0 auto 2.2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.8rem;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: .8rem;
}
.footer-brand .logo-icon {
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  font-size: 1.15rem;
  border-radius: 11px;
}
.fb-text {
  font-size: 1.18rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: .02em;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.8rem;
}
.footer-links a {
  color: var(--text-soft);
  font-size: .96rem;
  transition: color var(--transition);
}
.footer-links a:hover {
  color: var(--neon);
}
.footer-copyright {
  width: min(1200px, 92%);
  margin: 0 auto;
  padding-top: 1.6rem;
  border-top: 1px solid rgba(255, 255, 255, .07);
  text-align: center;
}
.footer-copyright p {
  color: rgba(144, 165, 192, .7);
  font-size: .88rem;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .article-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .article-sidebar {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 768px) {
  .header-inner {
    height: 64px;
  }
  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: min(78vw, 340px);
    height: 100vh;
    background: var(--bg-soft);
    border-left: 1px solid var(--line);
    padding: 5.5rem 2rem 2rem;
    flex-direction: column;
    gap: 1.2rem;
    align-items: stretch;
    transition: right .35s ease;
    z-index: 1001;
  }
  .nav.open {
    right: 0;
  }
  .nav-link {
    font-size: 1.05rem;
    padding: .8rem .2rem;
    border-bottom: 1px solid var(--line);
  }
  .nav-link::after {
    display: none;
  }
  .nav-cta {
    text-align: center;
  }
  .nav-toggle {
    display: block;
  }
  .article-hero {
    padding: 4rem 0 3rem;
  }
  .article-title-block h1 {
    font-size: 1.8rem;
  }
  .article-main {
    padding: 3rem 0 4rem;
  }
  .article-sidebar {
    grid-template-columns: 1fr;
  }
  .card-grid {
    grid-template-columns: 1fr;
    max-width: 460px;
    margin: 0 auto;
  }
  .cta-box {
    padding: 2.8rem 1.4rem;
  }
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
  .footer-links {
    justify-content: center;
    gap: 1.2rem;
  }
}
@media (max-width: 520px) {
  .container {
    width: 92%;
  }
  .article-card {
    padding: 1.4rem;
  }
  .article-title-block h1 {
    font-size: 1.55rem;
  }
  .article-title-block .lead {
    font-size: 1rem;
  }
  .article-meta {
    gap: .6rem;
  }
  .meta-item {
    font-size: .82rem;
    padding: .35rem .8rem;
  }
  .cta-actions {
    width: 100%;
  }
  .cta-actions .btn {
    width: 100%;
  }
  .faq-item {
    padding: 1rem 1.2rem;
  }
  .faq-item h3 {
    font-size: .98rem;
  }
}

/* roulang page: category2 */
:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-soft: #eef2f8;
  --text: #14233a;
  --muted: #5a6b82;
  --border: #e3e9f2;
  --primary: #00b8ff;
  --primary-deep: #008fd4;
  --accent: #7c4dff;
  --dark: #0a0f1c;
  --dark-card: #121b30;
  --gradient: linear-gradient(90deg, #00b8ff, #7c4dff);
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 12px 30px rgba(15, 25, 50, .08);
  --shadow-lg: 0 20px 50px rgba(15, 25, 50, .14);
  --max-width: 1200px;
  --space-section: 96px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input { font-family: inherit; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.section { padding: var(--space-section) 0; }
.section-head { max-width: 680px; margin-bottom: 48px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--primary-deep);
  background: rgba(0, 184, 255, .1);
  border: 1px solid rgba(0, 184, 255, .25);
  border-radius: 999px;
  padding: 5px 16px;
  margin-bottom: 14px;
}
.section-head h2 {
  font-size: 34px;
  line-height: 1.3;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text);
}
.section-head p { color: var(--muted); font-size: 16px; }
.section-head.light h2 { color: #fff; }
.section-head.light p { color: rgba(255, 255, 255, .7); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  transition: all .25s ease;
  border: none;
  cursor: pointer;
}
.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 8px 24px rgba(0, 184, 255, .3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 34px rgba(124, 77, 255, .38);
}
.btn-outline {
  background: transparent;
  color: #eaf6ff;
  border: 1px solid rgba(255, 255, 255, .45);
}
.btn-outline:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, .1);
  transform: translateY(-2px);
}

/* ==================== Header ==================== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: linear-gradient(90deg, #070b14, #0d1424);
  border-bottom: 2px solid transparent;
  border-image: linear-gradient(90deg, var(--primary), var(--accent)) 1;
  box-shadow: 0 4px 30px rgba(0, 0, 0, .35);
}
.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  letter-spacing: .02em;
  white-space: nowrap;
}
.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  box-shadow: 0 0 18px rgba(0, 184, 255, .5);
}
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.nav {
  display: flex;
  align-items: center;
  gap: 30px;
}
.nav-link {
  position: relative;
  color: rgba(255, 255, 255, .72);
  font-size: 15px;
  font-weight: 500;
  padding: 6px 2px;
  transition: color .25s ease;
}
.nav-link:hover {
  color: #fff;
}
.nav-link.active {
  color: #00daff;
  text-shadow: 0 0 14px rgba(0, 218, 255, .65);
}
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, #00daff, #7c4dff);
  box-shadow: 0 0 14px rgba(0, 218, 255, .8);
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 9px 22px;
  border-radius: 999px;
  background: var(--gradient);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 4px 20px rgba(0, 184, 255, .35);
  transition: all .25s ease;
}
.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(124, 77, 255, .4);
}
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: none;
  background: transparent;
  cursor: pointer;
  position: relative;
  z-index: 10;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  display: block;
  position: absolute;
  left: 50%;
  width: 24px;
  height: 2px;
  border-radius: 2px;
  background: #fff;
  transition: transform .25s ease, opacity .25s ease;
}
.nav-toggle span { top: 50%; transform: translate(-50%, -50%); }
.nav-toggle span::before { top: -7px; }
.nav-toggle span::after { top: 7px; }
.nav-toggle.open span { background: transparent; }
.nav-toggle.open span::before { top: 0; transform: rotate(45deg); }
.nav-toggle.open span::after { top: 0; transform: rotate(-45deg); }

/* ==================== Hero ==================== */
.page-hero {
  position: relative;
  padding: 120px 0 110px;
  background: linear-gradient(135deg, rgba(5, 10, 20, .88), rgba(10, 20, 40, .78)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  color: #fff;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 20% 20%, rgba(0, 184, 255, .22), transparent 55%);
  pointer-events: none;
}
.page-hero .container { position: relative; z-index: 2; }
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, .55);
  margin-bottom: 22px;
}
.breadcrumb a { color: rgba(255, 255, 255, .55); transition: color .2s; }
.breadcrumb a:hover { color: #00daff; }
.breadcrumb .sep { color: rgba(255, 255, 255, .3); }
.breadcrumb .current { color: rgba(255, 255, 255, .9); }
.page-hero h1 {
  font-size: 46px;
  line-height: 1.22;
  font-weight: 800;
  margin-bottom: 18px;
  letter-spacing: .02em;
}
.page-hero h1 .gradient-text {
  font-size: inherit;
}
.hero-desc {
  max-width: 640px;
  font-size: 17px;
  color: rgba(255, 255, 255, .75);
  margin-bottom: 34px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* ==================== Direction cards ==================== */
.direction-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.direction-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 26px;
  box-shadow: var(--shadow);
  transition: all .3s ease;
  position: relative;
  overflow: hidden;
  min-height: 220px;
}
.direction-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s ease;
}
.direction-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.direction-card:hover::before { transform: scaleX(1); }
.direction-icon {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary-deep);
  background: rgba(0, 184, 255, .08);
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  letter-spacing: -.03em;
}
.direction-card h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; }
.direction-card p { font-size: 14px; color: var(--muted); margin-bottom: 18px; }
.card-link {
  position: absolute;
  bottom: 26px;
  left: 26px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary-deep);
  transition: color .2s;
}
.card-link:hover { color: var(--accent); }
.card-hint {
  position: absolute;
  top: 28px;
  right: 24px;
  font-size: 12px;
  color: #93a4ba;
  background: var(--surface-soft);
  border-radius: 999px;
  padding: 3px 12px;
  white-space: nowrap;
}

/* ==================== Skill cards ==================== */
.skills { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.skill-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.skill-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all .3s ease;
  display: flex;
  flex-direction: column;
}
.skill-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 184, 255, .35);
}
.skill-cover {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}
.skill-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.skill-card:hover .skill-cover img { transform: scale(1.04); }
.skill-cover .badge {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
}
.badge {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(10, 15, 28, .72);
  color: #00daff;
  border: 1px solid rgba(0, 218, 255, .35);
  backdrop-filter: blur(6px);
}
.skill-body { padding: 24px 26px 28px; }
.skill-body h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; line-height: 1.45; }
.skill-body p { font-size: 14px; color: var(--muted); line-height: 1.7; }

/* ==================== Ranking ==================== */
.ranking {
  background: linear-gradient(180deg, #0a0f1c 0%, #0d1526 100%);
  color: #fff;
}
.ranking .section-tag {
  background: rgba(0, 218, 255, .1);
  border-color: rgba(0, 218, 255, .25);
  color: #00daff;
}
.ranking-list {
  list-style: none;
  max-width: 860px;
  margin: 0 auto;
}
.ranking-item {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 24px 28px;
  margin-bottom: 14px;
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: var(--radius);
  transition: all .3s ease;
}
.ranking-item:hover {
  background: rgba(255, 255, 255, .07);
  border-color: rgba(0, 218, 255, .3);
  transform: translateX(6px);
}
.ranking-num {
  font-size: 32px;
  font-weight: 800;
  font-style: italic;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(0, 218, 255, .7);
  min-width: 60px;
  text-align: center;
}
.ranking-info { flex: 1; min-width: 180px; }
.ranking-info h3 { font-size: 17px; font-weight: 600; margin-bottom: 2px; }
.ranking-info p { font-size: 13px; color: rgba(255, 255, 255, .5); }
.ranking-bar {
  width: 180px;
  height: 6px;
  background: rgba(255, 255, 255, .08);
  border-radius: 6px;
  overflow: hidden;
  flex-shrink: 0;
}
.ranking-bar span {
  display: block;
  height: 100%;
  background: var(--gradient);
  border-radius: 6px;
  box-shadow: 0 0 12px rgba(0, 184, 255, .5);
}
.ranking-heat {
  font-size: 20px;
  font-weight: 800;
  color: #00daff;
  min-width: 44px;
  text-align: right;
}

/* ==================== Myths ==================== */
.myths { background: var(--bg); }
.myth-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.myth-card {
  background: var(--surface);
  border-left: 4px solid #ff5d7f;
  border-radius: var(--radius-sm);
  padding: 30px 32px;
  box-shadow: var(--shadow);
}
.myth-card.fixed {
  border-left-color: var(--primary);
}
.myth-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: #ff5d7f;
  background: rgba(255, 93, 127, .12);
  padding: 3px 14px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.myth-card.fixed .myth-badge {
  color: var(--primary-deep);
  background: rgba(0, 184, 255, .1);
}
.myth-p { font-size: 16px; font-weight: 600; color: var(--text); margin-bottom: 14px; }
.fix-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--muted);
  margin-bottom: 4px;
}
.fix-text { font-size: 14px; color: var(--muted); line-height: 1.7; }

/* ==================== FAQ ==================== */
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color .25s, box-shadow .25s;
}
.faq-item.open {
  border-color: rgba(0, 184, 255, .45);
  box-shadow: var(--shadow);
}
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: none;
  border: none;
  padding: 22px 28px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  text-align: left;
  transition: color .2s;
}
.faq-q:hover { color: var(--primary-deep); }
.faq-icon {
  position: relative;
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 2px solid var(--primary);
  transition: transform .3s ease, background .3s ease;
}
.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  width: 10px; height: 2px;
  background: var(--primary-deep);
  border-radius: 2px;
  transform: translate(-50%, -50%);
  transition: background .2s;
}
.faq-icon::after { transform: translate(-50%, -50%) rotate(90deg); }
.faq-item.open .faq-icon {
  background: var(--primary);
  transform: rotate(180deg);
}
.faq-item.open .faq-icon::before { background: #fff; }
.faq-item.open .faq-icon::after { display: none; }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease;
}
.faq-a-inner {
  padding: 0 28px 24px;
  font-size: 15px;
  color: var(--muted);
  line-height: 1.8;
  border-top: 1px solid var(--border);
  padding-top: 18px;
}

/* ==================== CTA ==================== */
.cta {
  position: relative;
  background: linear-gradient(120deg, #0a0f1c, #101c33), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color: #fff;
  text-align: center;
  padding: 84px 0;
  border-top: 1px solid rgba(0, 218, 255, .2);
}
.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 80%, rgba(0, 184, 255, .18), transparent 60%);
  pointer-events: none;
}
.cta .container { position: relative; z-index: 2; }
.cta h2 { font-size: 34px; font-weight: 800; margin-bottom: 14px; }
.cta p { font-size: 16px; color: rgba(255, 255, 255, .68); max-width: 560px; margin: 0 auto 32px; }
.cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

/* ==================== Footer ==================== */
.footer {
  background: #070b14;
  color: rgba(255, 255, 255, .55);
  border-top: 1px solid rgba(255, 255, 255, .06);
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 30px;
  flex-wrap: wrap;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.footer-brand .logo-icon {
  width: 34px;
  height: 34px;
  font-size: 18px;
  border-radius: 8px;
}
.fb-text { font-size: 18px; font-weight: 700; color: #fff; }
.footer-links {
  display: flex;
  gap: 26px;
  flex-wrap: wrap;
}
.footer-links a {
  font-size: 14px;
  color: rgba(255, 255, 255, .6);
  transition: color .2s;
}
.footer-links a:hover { color: #00daff; }
.footer-copyright {
  border-top: 1px solid rgba(255, 255, 255, .05);
  text-align: center;
  padding: 22px 20px;
  font-size: 13px;
  color: rgba(255, 255, 255, .35);
}

/* ==================== Responsive ==================== */
@media (max-width: 1024px) {
  .direction-grid { grid-template-columns: repeat(2, 1fr); }
  .skill-grid { grid-template-columns: repeat(2, 1fr); }
  .page-hero h1 { font-size: 38px; }
}
@media (max-width: 768px) {
  :root { --space-section: 64px; }
  .nav {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #0b1220;
    border-top: 1px solid rgba(255, 255, 255, .06);
    padding: 12px 20px 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, .3);
  }
  .nav.open { display: flex; }
  .nav .nav-link {
    padding: 14px 6px;
    font-size: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, .05);
  }
  .nav-cta {
    margin-top: 16px;
    justify-content: center;
  }
  .nav-toggle { display: block; }
  .page-hero { padding: 84px 0 78px; }
  .page-hero h1 { font-size: 32px; }
  .hero-desc { font-size: 15px; }
  .section-head h2 { font-size: 28px; }
  .ranking-item { flex-wrap: wrap; gap: 12px; }
  .ranking-bar { width: 100%; order: 3; }
  .ranking-num { min-width: 44px; font-size: 26px; }
  .myth-grid { grid-template-columns: 1fr; }
  .cta h2 { font-size: 27px; }
}
@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .header-inner { padding: 0 18px; }
  .direction-grid { grid-template-columns: 1fr; }
  .skill-grid { grid-template-columns: 1fr; }
  .page-hero h1 { font-size: 27px; }
  .hero-actions .btn { width: 100%; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 20px; }
  .footer-links { gap: 16px; }
  .ranking-item { padding: 18px; }
  .cta-actions .btn { width: 100%; }
}

/* roulang page: category3 */
:root {
            --color-bg: #0a0e1a;
            --color-bg-soft: #0f1626;
            --color-surface: #131c2e;
            --color-surface-light: #1a2538;
            --color-border: #1e2c42;
            --color-border-glow: rgba(0, 212, 255, 0.35);
            --color-primary: #00d4ff;
            --color-secondary: #00ffa3;
            --color-text: #e6edf7;
            --color-text-soft: #8a9bb5;
            --color-text-dim: #5a6b85;
            --color-danger: #ff4d6d;
            --color-warning: #ffc24d;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.25);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.15);
            --space-section: 90px;
            --space-section-mobile: 50px;
            --max-width: 1240px;
            --font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            font-size: 16px;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease;
        }

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

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

        input {
            font-family: inherit;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 28px;
        }

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

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--color-primary);
            background: rgba(0, 212, 255, 0.08);
            border: 1px solid rgba(0, 212, 255, 0.2);
            padding: 6px 16px;
            border-radius: 100px;
            margin-bottom: 16px;
        }

        .section-title {
            font-size: clamp(28px, 4vw, 38px);
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.5px;
            margin-bottom: 14px;
        }

        .section-desc {
            color: var(--color-text-soft);
            font-size: 16px;
            max-width: 680px;
            line-height: 1.8;
        }

        .gradient-text {
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        /* ===== Header ===== */
        .header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(10, 14, 26, 0.92);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 212, 255, 0.15);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.45);
        }

        .header::after {
            content: "";
            display: block;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
            opacity: 0.7;
        }

        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 22px;
            font-weight: 800;
            letter-spacing: 0.5px;
            color: var(--color-text);
            flex-shrink: 0;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 900;
            color: #0a0e1a;
            box-shadow: 0 0 18px rgba(0, 212, 255, 0.3);
        }

        .logo .gradient-text {
            font-weight: 800;
        }

        .nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-link {
            position: relative;
            display: inline-block;
            padding: 8px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-soft);
            border-radius: 100px;
            transition: all 0.3s ease;
        }

        .nav-link::after {
            content: "";
            position: absolute;
            left: 50%;
            bottom: 2px;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
            border-radius: 2px;
            transform: translateX(-50%);
            transition: width 0.3s ease;
            box-shadow: 0 0 8px rgba(0, 212, 255, 0.5);
        }

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

        .nav-link:hover::after {
            width: 24px;
        }

        .nav-link.active {
            color: var(--color-primary);
            background: rgba(0, 212, 255, 0.08);
            text-shadow: 0 0 18px rgba(0, 212, 255, 0.5);
        }

        .nav-link.active::after {
            width: 24px;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-left: 14px;
            padding: 9px 24px;
            font-size: 14px;
            font-weight: 600;
            color: #0a0e1a;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            border-radius: 100px;
            box-shadow: 0 0 18px rgba(0, 212, 255, 0.3);
            transition: transform 0.25s, box-shadow 0.25s;
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 24px rgba(0, 212, 255, 0.45);
        }

        .nav-toggle {
            display: none;
            width: 48px;
            height: 48px;
            border-radius: 12px;
            border: 1px solid var(--color-border);
            background: var(--color-surface);
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 5px;
        }

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

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

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

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

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            padding: 100px 0 80px;
            background: linear-gradient(135deg, rgba(10, 14, 26, 0.92), rgba(10, 14, 26, 0.75)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            border-bottom: 1px solid var(--color-border);
        }

        .hero::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at 30% 60%, rgba(0, 212, 255, 0.08), transparent 60%);
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
        }

        .hero .section-label {
            margin-bottom: 20px;
        }

        .hero h1 {
            font-size: clamp(34px, 5vw, 52px);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -1px;
            margin-bottom: 20px;
        }

        .hero p {
            font-size: 17px;
            color: var(--color-text-soft);
            line-height: 1.9;
            max-width: 640px;
            margin-bottom: 32px;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 13px 30px;
            border-radius: 100px;
            font-size: 15px;
            font-weight: 600;
            transition: all 0.3s ease;
            border: 1px solid transparent;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            color: #0a0e1a;
            box-shadow: 0 0 24px rgba(0, 212, 255, 0.25);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 30px rgba(0, 212, 255, 0.4);
        }

        .btn-outline {
            background: transparent;
            border-color: rgba(0, 212, 255, 0.4);
            color: var(--color-primary);
        }

        .btn-outline:hover {
            border-color: var(--color-primary);
            background: rgba(0, 212, 255, 0.06);
            transform: translateY(-2px);
        }

        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-top: 40px;
            padding-top: 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        .hero-meta-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--color-text-soft);
        }

        .hero-meta-item i {
            color: var(--color-primary);
            font-size: 18px;
        }

        /* ===== Filter Bar ===== */
        .filter-bar {
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border);
            padding: 24px 0;
            position: sticky;
            top: 72px;
            z-index: 10;
            backdrop-filter: blur(12px);
            background: rgba(19, 28, 46, 0.92);
        }

        .filter-inner {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .filter-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 18px;
            border-radius: 100px;
            border: 1px solid var(--color-border);
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text-soft);
            background: transparent;
            transition: all 0.3s ease;
        }

        .filter-tag:hover {
            color: var(--color-primary);
            border-color: var(--color-border-glow);
            background: rgba(0, 212, 255, 0.04);
        }

        .filter-tag.active {
            color: var(--color-primary);
            border-color: var(--color-primary);
            background: rgba(0, 212, 255, 0.08);
            box-shadow: 0 0 16px rgba(0, 212, 255, 0.12);
        }

        /* ===== News Section ===== */
        .news-section {
            background: var(--color-bg);
        }

        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: 40px;
        }

        .news-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all 0.35s ease;
            display: flex;
            flex-direction: column;
        }

        .news-card:hover {
            transform: translateY(-6px);
            border-color: rgba(0, 212, 255, 0.25);
            box-shadow: var(--shadow-md), var(--shadow-glow);
        }

        .news-card-img {
            position: relative;
            height: 190px;
            overflow: hidden;
        }

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

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

        .news-card-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(10, 14, 26, 0.8));
        }

        .news-card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 14px;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 100px;
            background: rgba(0, 212, 255, 0.08);
            color: var(--color-primary);
            border: 1px solid rgba(0, 212, 255, 0.15);
        }

        .tag-green {
            background: rgba(0, 255, 163, 0.08);
            color: var(--color-secondary);
            border-color: rgba(0, 255, 163, 0.15);
        }

        .tag-warning {
            background: rgba(255, 194, 77, 0.08);
            color: var(--color-warning);
            border-color: rgba(255, 194, 77, 0.15);
        }

        .news-card-title {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 10px;
            color: var(--color-text);
            transition: color 0.25s;
        }

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

        .news-card-desc {
            font-size: 14px;
            color: var(--color-text-soft);
            line-height: 1.7;
            flex: 1;
        }

        .news-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 18px;
            padding-top: 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 13px;
            color: var(--color-text-dim);
        }

        .news-card-meta i {
            color: var(--color-primary);
            margin-right: 4px;
        }

        .news-card-link {
            color: var(--color-primary);
            font-size: 14px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap 0.25s;
        }

        .news-card-link:hover {
            gap: 10px;
        }

        /* ===== Knowledge Grid ===== */
        .knowledge-section {
            background: var(--color-bg-soft);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }

        .knowledge-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 44px;
        }

        .knowledge-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .knowledge-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--color-primary), transparent);
            opacity: 0.6;
            transition: opacity 0.3s;
        }

        .knowledge-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 212, 255, 0.3);
            box-shadow: var(--shadow-md);
        }

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

        .knowledge-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: rgba(0, 212, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--color-primary);
            margin-bottom: 18px;
            border: 1px solid rgba(0, 212, 255, 0.15);
        }

        .knowledge-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
        }

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

        .knowledge-card .link-text {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 16px;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            transition: gap 0.25s;
        }

        .knowledge-card .link-text:hover {
            gap: 10px;
        }

        /* ===== Stats Panel ===== */
        .stats-section {
            position: relative;
            background: linear-gradient(135deg, rgba(10, 14, 26, 0.95), rgba(15, 22, 38, 0.9)), url('/assets/images/backpic/back-1.png') center/cover no-repeat fixed;
            padding: 80px 0;
            border-bottom: 1px solid var(--color-border);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }

        .stat-item {
            text-align: center;
            padding: 32px 20px;
            background: rgba(19, 28, 46, 0.75);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            transition: all 0.3s;
        }

        .stat-item:hover {
            border-color: rgba(0, 212, 255, 0.3);
            box-shadow: var(--shadow-glow);
        }

        .stat-number {
            font-size: 38px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1.2;
            margin-bottom: 8px;
        }

        .stat-label {
            font-size: 14px;
            color: var(--color-text-soft);
        }

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

        /* ===== Steps Section ===== */
        .steps-section {
            background: var(--color-bg);
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 44px;
            counter-reset: step;
        }

        .step-card {
            position: relative;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 32px 24px 24px;
            transition: all 0.3s;
        }

        .step-card::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -18px;
            left: 24px;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            color: #0a0e1a;
            font-size: 18px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 14px rgba(0, 212, 255, 0.3);
        }

        .step-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 212, 255, 0.25);
            box-shadow: var(--shadow-md);
        }

        .step-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-top: 10px;
            margin-bottom: 10px;
        }

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

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

        .faq-grid {
            max-width: 860px;
            margin: 44px auto 0;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.3s;
        }

        .faq-item:hover {
            border-color: rgba(0, 212, 255, 0.2);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 500;
            cursor: pointer;
            list-style: none;
            transition: background 0.25s;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary:hover {
            background: rgba(0, 212, 255, 0.03);
        }

        .faq-item summary::after {
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            color: var(--color-primary);
            transition: transform 0.3s;
            flex-shrink: 0;
        }

        .faq-item details[open] summary::after {
            transform: rotate(180deg);
        }

        .faq-item[open] {
            border-color: rgba(0, 212, 255, 0.3);
            box-shadow: var(--shadow-glow);
        }

        .faq-answer {
            padding: 0 24px 22px;
            color: var(--color-text-soft);
            font-size: 15px;
            line-height: 1.8;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 16px;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            position: relative;
            background: linear-gradient(135deg, rgba(10, 14, 26, 0.92), rgba(15, 22, 38, 0.85)), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            padding: 90px 0;
            text-align: center;
        }

        .cta-content {
            max-width: 700px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: clamp(28px, 4vw, 38px);
            font-weight: 700;
            margin-bottom: 16px;
        }

        .cta-content p {
            font-size: 16px;
            color: var(--color-text-soft);
            line-height: 1.8;
            margin-bottom: 32px;
        }

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

        /* ===== Footer ===== */
        .footer {
            background: var(--color-bg);
            border-top: 1px solid var(--color-border);
            padding-top: 56px;
        }

        .footer-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 28px 32px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 24px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .footer-brand .logo-icon {
            width: 34px;
            height: 34px;
            font-size: 16px;
            border-radius: 8px;
        }

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

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

        .footer-links a {
            display: inline-block;
            padding: 6px 16px;
            font-size: 14px;
            color: var(--color-text-soft);
            border-radius: 100px;
            transition: all 0.25s;
        }

        .footer-links a:hover {
            color: var(--color-primary);
            background: rgba(0, 212, 255, 0.06);
        }

        .footer-copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 20px 24px;
            text-align: center;
            font-size: 13px;
            color: var(--color-text-dim);
        }

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

            .knowledge-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

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

            .header-inner {
                padding: 0 16px;
                height: 64px;
            }

            .nav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(10, 14, 26, 0.98);
                flex-direction: column;
                align-items: stretch;
                padding: 20px;
                gap: 12px;
                border-bottom: 1px solid var(--color-border);
                transform: translateY(-120%);
                transition: transform 0.4s ease;
                z-index: 99;
            }

            .nav.open {
                transform: translateY(0);
            }

            .nav-link {
                display: block;
                padding: 14px 20px;
                text-align: center;
                font-size: 16px;
            }

            .nav-cta {
                margin: 8px 0 0;
                justify-content: center;
            }

            .nav-toggle {
                display: flex;
            }

            .filter-bar {
                top: 64px;
                padding: 16px 0;
            }

            .filter-inner {
                flex-wrap: nowrap;
                overflow-x: auto;
                padding-bottom: 4px;
                -webkit-overflow-scrolling: touch;
            }

            .filter-tag {
                flex-shrink: 0;
            }

            .hero {
                min-height: 360px;
                padding: 70px 0 50px;
            }

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

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

            .hero-buttons .btn {
                padding: 11px 22px;
                font-size: 14px;
            }

            .hero-meta {
                gap: 16px;
                margin-top: 28px;
                padding-top: 20px;
            }

            .news-grid {
                grid-template-columns: 1fr;
                gap: 20px;
                margin-top: 28px;
            }

            .knowledge-grid {
                grid-template-columns: 1fr;
                gap: 16px;
                margin-top: 28px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .stat-number {
                font-size: 28px;
            }

            .steps-grid {
                grid-template-columns: 1fr;
                gap: 18px;
                margin-top: 36px;
            }

            .footer-inner {
                flex-direction: column;
                align-items: center;
                text-align: center;
                gap: 16px;
                padding: 0 16px 24px;
            }

            .footer-links {
                justify-content: center;
            }
        }

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

            .hero {
                padding: 56px 0 44px;
            }

            .hero h1 {
                font-size: 28px;
            }

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

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

            .hero-buttons .btn {
                justify-content: center;
            }

            .section-title {
                font-size: 25px;
            }

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

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

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

            .stat-item {
                padding: 22px 16px;
            }

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

            .cta-buttons {
                flex-direction: column;
            }

            .cta-buttons .btn {
                justify-content: center;
            }

            .filter-tag {
                font-size: 13px;
                padding: 6px 14px;
            }

            .faq-item summary {
                padding: 16px 18px;
                font-size: 15px;
            }

            .faq-answer {
                padding: 12px 18px 18px;
                font-size: 14px;
            }
        }

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