/* roulang page: index */
:root {
  --primary: #0A0F1E;
  --secondary: #111A2E;
  --accent-cyan: #00E0C6;
  --accent-orange: #FF6A3D;
  --text-main: #EAF0FF;
  --text-sub: #9AA8C7;
  --text-weak: #64708C;
  --border-light: rgba(255,255,255,0.12);
  --border-cyan: rgba(0,224,198,0.5);
  --card-bg: rgba(255,255,255,0.06);
  --radius-card: 18px;
  --radius-btn: 999px;
  --radius-input: 12px;
  --shadow-card: 0 10px 40px rgba(0,0,0,0.35);
  --shadow-hover: 0 20px 60px rgba(0,0,0,0.5);
  --shadow-cta: 0 0 0 1px rgba(255,106,61,0.4), 0 8px 32px rgba(255,106,61,0.35);
  --font-base: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --font-num: "Rajdhani", "DIN Alternate", sans-serif;
  --transition: all 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-base);
  background: var(--primary);
  color: var(--text-main);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: #fff;
}

button, input {
  font-family: inherit;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding-block: 96px;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 48px;
  gap: 24px;
}

.section-title-wrap {
  position: relative;
}

.section-title {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 8px;
  position: relative;
  padding-left: 18px;
}

.section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 6px;
  border-radius: 6px;
  background: var(--accent-orange);
}

.section-sub {
  color: var(--text-sub);
  font-size: 15px;
}

.link-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-cyan);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 18px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-btn);
  transition: var(--transition);
}

.link-more:hover {
  background: rgba(0,224,198,0.1);
  border-color: var(--border-cyan);
  transform: translateX(4px);
}

/* ===== 导航 ===== */
.header {
  position: fixed;
  top: 16px;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  justify-content: center;
  padding: 0 16px;
}

.nav-capsule {
  background: rgba(10,15,30,0.65);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-light);
  border-radius: 999px;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  max-width: 720px;
  width: auto;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}

.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  padding: 6px 14px;
  border-radius: 999px;
  white-space: nowrap;
}

.nav-logo strong {
  font-weight: 800;
  color: #fff;
}

.nav-logo .logo-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 12px var(--accent-cyan);
  display: inline-block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-sub);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 999px;
  transition: var(--transition);
  min-height: 40px;
}

.nav-link:hover {
  color: var(--accent-cyan);
  background: rgba(255,255,255,0.06);
}

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 16px;
  right: 16px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent-cyan), transparent);
}

.nav-cta {
  background: var(--accent-orange);
  color: #fff !important;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 20px;
  border-radius: 999px;
  box-shadow: var(--shadow-cta);
  transition: var(--transition);
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: 4px;
}

.nav-cta:hover {
  box-shadow: 0 0 24px rgba(255,106,61,0.7);
  transform: translateY(-2px);
  background: #ff7a53;
}

.nav-toggle {
  display: none;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border-light);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  color: var(--text-main);
  font-size: 16px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

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

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 140px;
  padding-bottom: 80px;
  background: linear-gradient(180deg, rgba(10,15,30,0.78), #0A0F1E 88%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: linear-gradient(rgba(0,224,198,0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(0,224,198,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: center;
}

.hero-content h1 {
  font-size: clamp(36px, 5.5vw, 64px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.hero-content h1 .text-cyan {
  color: var(--accent-cyan);
}

.hero-content h1 .text-orange {
  color: var(--accent-orange);
}

.hero-sub {
  font-size: 17px;
  color: var(--text-sub);
  margin-bottom: 32px;
  max-width: 520px;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--accent-orange);
  color: #fff;
  border: none;
  border-radius: var(--radius-btn);
  padding: 14px 36px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-cta);
  transition: var(--transition);
  min-height: 48px;
}

.btn-primary:hover {
  box-shadow: 0 0 24px rgba(255,106,61,0.7);
  transform: translateY(-2px);
  color: #fff;
  background: #ff7a53;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: transparent;
  color: var(--text-main);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-btn);
  padding: 14px 32px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  min-height: 48px;
}

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

.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 56px;
  flex-wrap: wrap;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-num {
  font-family: var(--font-num);
  font-size: 28px;
  font-weight: 700;
  color: #fff;
}

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

/* 登录卡片 */
.login-card {
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-light);
  border-radius: 24px;
  padding: 36px;
  box-shadow: var(--shadow-card), inset 0 1px 0 rgba(255,255,255,0.1);
}

.login-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}

.login-card-title {
  font-size: 22px;
  font-weight: 700;
}

.badge-group {
  display: flex;
  gap: 8px;
}

.badge-security {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(0,224,198,0.12);
  color: var(--accent-cyan);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
}

.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 8px;
  font-weight: 500;
}

.form-input {
  width: 100%;
  background: rgba(0,0,0,0.3);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-input);
  padding: 12px 16px;
  color: var(--text-main);
  font-size: 15px;
  transition: var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(0,224,198,0.15);
}

.form-input::placeholder {
  color: var(--text-weak);
}

.btn-login {
  width: 100%;
  background: var(--accent-orange);
  color: #fff;
  border: none;
  border-radius: var(--radius-input);
  padding: 14px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-cta);
  transition: var(--transition);
  margin-top: 8px;
}

.btn-login:hover {
  box-shadow: 0 0 24px rgba(255,106,61,0.7);
  background: #ff7a53;
  transform: translateY(-2px);
}

.login-links {
  display: flex;
  justify-content: space-between;
  margin-top: 18px;
}

.login-links a {
  font-size: 13px;
  color: var(--text-sub);
}

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

/* ===== 资讯卡片 ===== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 40px;
}

.article-card {
  background: var(--card-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-cyan);
  box-shadow: var(--shadow-hover);
}

.card-cover {
  position: relative;
  height: 180px;
  min-height: 180px;
  background: linear-gradient(135deg, #1a2440, #0A0F1E);
  overflow: hidden;
}

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

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

.card-category {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(255,106,61,0.9);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  z-index: 2;
}

.card-body {
  padding: 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.card-title {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text-main);
}

.card-excerpt {
  font-size: 14px;
  color: var(--text-sub);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

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

.card-time {
  font-size: 13px;
  color: var(--text-weak);
}

.card-link {
  font-size: 13px;
  color: var(--accent-cyan);
  font-weight: 600;
}

.card-link:hover {
  color: #fff;
}

/* ===== 热门服务 ===== */
.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  align-items: start;
}

.service-card {
  background: var(--card-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  padding: 32px 24px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  min-height: 260px;
  display: flex;
  flex-direction: column;
}

.service-card:nth-child(1),
.service-card:nth-child(4) {
  transform: translateY(-24px);
}

.service-card:hover {
  border-color: var(--border-cyan);
  box-shadow: var(--shadow-hover);
  transform: translateY(-30px);
}

.service-card:nth-child(2):hover,
.service-card:nth-child(3):hover {
  transform: translateY(-6px);
}

.service-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(0,224,198,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--accent-cyan);
  margin-bottom: 18px;
  transition: var(--transition);
}

.service-card:hover .service-icon {
  background: linear-gradient(135deg, rgba(0,224,198,0.2), rgba(255,106,61,0.2));
  color: var(--accent-orange);
}

.service-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

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

.service-link {
  margin-top: 18px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--accent-cyan);
  font-weight: 600;
}

.service-link i {
  transition: transform 0.25s ease;
}

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

/* ===== 评价轮播 ===== */
.testimonial-section {
  background: var(--secondary);
}

.testimonial-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border-light);
  border-radius: 20px;
  padding: 32px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  min-height: 260px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-card);
}

.testimonial-stars {
  color: var(--accent-orange);
  font-size: 16px;
  letter-spacing: 4px;
  margin-bottom: 16px;
}

.testimonial-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-main);
  flex: 1;
  margin-bottom: 20px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-orange));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: #fff;
  font-weight: 700;
}

.testimonial-name {
  font-size: 14px;
  font-weight: 600;
}

.testimonial-role {
  font-size: 12px;
  color: var(--text-weak);
}

/* ===== 保障条 ===== */
.guarantee-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  background: var(--secondary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.guarantee-item {
  padding: 32px 24px;
  text-align: center;
  position: relative;
}

.guarantee-item + .guarantee-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 25%;
  bottom: 25%;
  width: 1px;
  background: rgba(255,255,255,0.08);
}

.guarantee-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(0,224,198,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  font-size: 16px;
  margin: 0 auto 14px;
}

.guarantee-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
}

.guarantee-desc {
  font-size: 13px;
  color: var(--text-sub);
}

/* ===== CTA ===== */
.cta-section {
  position: relative;
  background: linear-gradient(180deg, rgba(10,15,30,0.85), #0A0F1E 90%), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  text-align: center;
  padding: 100px 0;
}

.cta-content h2 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  margin-bottom: 16px;
}

.cta-content p {
  font-size: 16px;
  color: var(--text-sub);
  max-width: 640px;
  margin: 0 auto 36px;
}

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

/* ===== FAQ ===== */
.faq-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border-light);
  border-radius: 14px;
  overflow: hidden;
  transition: var(--transition);
}

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

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  transition: var(--transition);
  min-height: 60px;
}

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

.faq-icon {
  width: 28px;
  height: 28px;
  min-width: 28px;
  border-radius: 50%;
  background: rgba(255,106,61,0.15);
  color: var(--accent-orange);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: var(--transition);
  margin-left: 16px;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: var(--accent-orange);
  color: #fff;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

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

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

/* ===== 页脚 ===== */
.footer {
  background: #060B16;
  border-top: 1px solid rgba(255,255,255,0.05);
  padding: 72px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 48px;
}

.footer-brand p {
  color: var(--text-sub);
  font-size: 14px;
  margin-top: 16px;
  max-width: 320px;
}

.footer-logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.footer-logo .logo-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
}

.footer-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
  color: #fff;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

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

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
  color: var(--text-sub);
  font-size: 14px;
}

.footer-contact i {
  color: var(--accent-cyan);
  width: 20px;
  margin-right: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

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

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

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .container {
    padding: 0 20px;
  }
  
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 48px;
    text-align: center;
  }
  
  .hero-sub {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .hero-stats {
    justify-content: center;
  }
  
  .login-card {
    max-width: 480px;
    margin: 0 auto;
  }
  
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .service-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .service-card:nth-child(1),
  .service-card:nth-child(4) {
    transform: none;
  }
  
  .service-card:hover,
  .service-card:nth-child(2):hover,
  .service-card:nth-child(3):hover {
    transform: translateY(-6px);
  }
  
  .guarantee-bar {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .guarantee-item:nth-child(2)::before {
    display: none;
  }
  
  .guarantee-item:nth-child(n+3)::before {
    top: 0;
    bottom: auto;
    left: 25%;
    right: 25%;
    width: auto;
    height: 1px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .section {
    padding-block: 64px;
  }
  
  .section-title {
    font-size: 26px;
  }
  
  .section-head {
    flex-direction: column;
    align-items: flex-start;
    margin-bottom: 32px;
  }
  
  .news-grid {
    grid-template-columns: 1fr;
  }
  
  .container {
    padding: 0 16px;
  }
  
  .nav-capsule {
    padding: 6px 8px;
    max-width: calc(100% - 32px);
  }
  
  .nav-logo {
    font-size: 14px;
    padding: 6px 8px;
  }
  
  .nav-links {
    display: none;
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    right: 0;
    background: rgba(10,15,30,0.95);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    border: 1px solid var(--border-light);
    padding: 16px;
    flex-direction: column;
    gap: 8px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  }
  
  .nav-links.open {
    display: flex;
  }
  
  .nav-link {
    width: 100%;
    justify-content: flex-start;
    padding: 12px 16px;
    font-size: 15px;
  }
  
  .nav-link.active::after {
    left: 16px;
    right: auto;
    width: 24px;
  }
  
  .nav-cta {
    margin-left: 0;
    width: 100%;
    justify-content: center;
    margin-top: 8px;
  }
  
  .nav-toggle {
    display: flex;
  }
}

@media (max-width: 640px) {
  .hero {
    padding-top: 120px;
    padding-bottom: 60px;
  }
  
  .hero-content h1 {
    font-size: 32px;
  }
  
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .btn-primary, .btn-ghost {
    width: 100%;
  }
  
  .hero-stats {
    gap: 24px;
    margin-top: 40px;
    justify-content: space-around;
  }
  
  .service-grid {
    grid-template-columns: 1fr;
  }
  
  .guarantee-bar {
    grid-template-columns: 1fr;
  }
  
  .guarantee-item::before,
  .guarantee-item:nth-child(2)::before,
  .guarantee-item:nth-child(n+3)::before {
    display: none;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  
  .cta-section {
    padding: 72px 0;
  }
}

/* ===== 平滑滚动进入动画 ===== */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  
  .article-card, .service-card {
    transition: none;
  }
}

/* 移动端底部固定导航（仅首页） */
@media (max-width: 640px) {
  .mobile-bottom-nav {
    display: none;
  }
}

/* roulang page: article */
:root {
  --bg-primary: #0A0F1E;
  --bg-secondary: #111A2E;
  --bg-light: #F5F7FC;
  --bg-card: rgba(255, 255, 255, 0.06);
  --accent: #00E0C6;
  --accent-orange: #FF6A3D;
  --text-primary: #EAF0FF;
  --text-secondary: #9AA8C7;
  --text-muted: #64708C;
  --text-dark: #1E2735;
  --text-dark-muted: #5A6B85;
  --border: rgba(255, 255, 255, 0.12);
  --border-light: rgba(10, 15, 30, 0.08);
  --radius: 18px;
  --radius-sm: 12px;
  --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 20px 60px rgba(0, 0, 0, 0.5);
  --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --font-num: "Rajdhani", "DIN Alternate", "Bahnschrift", sans-serif;
  --transition: all 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}
button, input {
  font-family: inherit;
  font-size: inherit;
}
ul, ol {
  list-style: none;
}
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 28px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, #FF6A3D, #FF8A5C);
  color: #0A0F1E;
  box-shadow: 0 0 0 1px rgba(255, 106, 61, 0.4), 0 8px 32px rgba(255, 106, 61, 0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 24px rgba(255, 106, 61, 0.7), 0 8px 40px rgba(255, 106, 61, 0.4);
  color: #0A0F1E;
}
.btn-primary:focus-visible {
  outline: 3px solid rgba(255, 106, 61, 0.6);
  outline-offset: 3px;
}
.btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--border);
  color: var(--text-primary);
  backdrop-filter: blur(10px);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(0, 224, 198, 0.5);
  color: var(--accent);
  transform: translateY(-2px);
}
.btn-ghost:focus-visible {
  outline: 3px solid rgba(0, 224, 198, 0.4);
  outline-offset: 3px;
}
.section-head {
  text-align: center;
  margin-bottom: 52px;
}
.section-sub {
  display: block;
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.section-head h2 {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
  position: relative;
  display: inline-block;
  padding-bottom: 16px;
}
.section-head h2::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 52px;
  height: 4px;
  transform: translateX(-50%);
  background: linear-gradient(90deg, var(--accent), var(--accent-orange));
  border-radius: 99px;
}
.section-head h2 a, .section-head h2 span {
  color: inherit;
}

/* 悬浮胶囊导航 */
.header {
  position: fixed;
  top: 16px;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  justify-content: center;
  padding: 0 20px;
  pointer-events: none;
}
.nav-capsule {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 10px 14px 10px 24px;
  background: rgba(10, 15, 30, 0.65);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: 999px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  max-width: 760px;
  width: 100%;
}
.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  font-size: 17px;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  flex-shrink: 0;
}
.nav-logo strong {
  font-weight: 800;
}
.logo-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  margin-left: 5px;
  box-shadow: 0 0 12px rgba(0, 224, 198, 0.8);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--text-primary);
  font-size: 16px;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}
.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(0, 224, 198, 0.5);
}
.nav-toggle:focus-visible {
  outline: 3px solid rgba(0, 224, 198, 0.5);
  outline-offset: 2px;
}
.nav-toggle.active i::before {
  content: "\f00d";
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  justify-content: flex-end;
}
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 999px;
  transition: var(--transition);
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-orange));
  border-radius: 99px;
  transform: translateX(-50%);
  transition: width 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.nav-link:hover {
  color: var(--accent);
  background: rgba(255, 255, 255, 0.06);
}
.nav-link:hover::after {
  width: 60%;
}
.nav-link.active {
  color: var(--accent);
  background: rgba(0, 224, 198, 0.08);
}
.nav-link.active::after {
  width: 60%;
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 8px 20px;
  border-radius: 999px;
  background: linear-gradient(135deg, #FF6A3D, #FF8A5C);
  color: #0A0F1E;
  font-size: 14px;
  font-weight: 700;
  margin-left: 4px;
  box-shadow: 0 0 0 1px rgba(255, 106, 61, 0.4), 0 6px 24px rgba(255, 106, 61, 0.35);
  transition: var(--transition);
  white-space: nowrap;
}
.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 20px rgba(255, 106, 61, 0.7), 0 8px 32px rgba(255, 106, 61, 0.4);
  color: #0A0F1E;
}
.nav-cta:focus-visible {
  outline: 3px solid rgba(255, 106, 61, 0.6);
  outline-offset: 2px;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 28px;
}
.breadcrumb a {
  color: var(--text-secondary);
  transition: var(--transition);
}
.breadcrumb a:hover {
  color: var(--accent);
}
.breadcrumb-sep {
  color: var(--text-muted);
  font-size: 12px;
}
.breadcrumb-current {
  color: var(--text-primary);
  font-weight: 500;
  max-width: 320px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 文章 Hero */
.article-hero {
  background: linear-gradient(180deg, rgba(10, 15, 30, 0.82), rgba(10, 15, 30, 0.92)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  padding: 150px 0 190px;
  position: relative;
}
.article-head {
  max-width: 860px;
}
.article-head-top {
  margin-bottom: 20px;
}
.article-category {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(0, 224, 198, 0.12);
  border: 1px solid rgba(0, 224, 198, 0.35);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.article-category i {
  font-size: 12px;
}
.article-title {
  font-size: clamp(30px, 4.4vw, 52px);
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-primary);
  margin: 0 0 18px;
  letter-spacing: 0.01em;
}
.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
  color: var(--text-secondary);
  font-size: 14px;
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}
.meta-item i {
  color: var(--accent);
  font-size: 14px;
}
.meta-item .num {
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

/* 文章卡片 */
.article-content-section {
  position: relative;
  z-index: 3;
  padding-bottom: 60px;
}
.article-card {
  max-width: 900px;
  margin: -120px auto 0;
  background: linear-gradient(180deg, var(--bg-light), #EDF1F8);
  border-radius: 24px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  padding: 48px;
  position: relative;
}
.post-cover {
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 40px;
  min-height: 220px;
  background: linear-gradient(135deg, rgba(0, 224, 198, 0.12), rgba(255, 106, 61, 0.12));
  position: relative;
}
.post-cover img {
  width: 100%;
  height: auto;
  object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.post-cover:hover img {
  transform: scale(1.02);
}
.post-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 15, 30, 0.06), rgba(10, 15, 30, 0.18));
  border-radius: 16px;
  pointer-events: none;
}

/* 正文排版 */
.post-content {
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-dark);
}
.post-content > * + * {
  margin-top: 1.2em;
}
.post-content p {
  margin-bottom: 1.6em;
}
.post-content a {
  color: #0BA58E;
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: rgba(11, 165, 142, 0.4);
  transition: var(--transition);
}
.post-content a:hover {
  color: #078F7B;
  text-decoration-color: #078F7B;
}
.post-content h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-dark);
  margin: 2em 0 0.9em;
  padding-left: 15px;
  border-left: 4px solid var(--accent-orange);
  line-height: 1.4;
}
.post-content h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-dark);
  margin: 1.8em 0 0.7em;
  line-height: 1.4;
}
.post-content h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-dark);
  margin: 1.5em 0 0.6em;
}
.post-content ul,
.post-content ol {
  padding-left: 26px;
  margin-bottom: 1.6em;
}
.post-content ul li {
  list-style: disc;
  margin-bottom: 0.55em;
}
.post-content ol li {
  list-style: decimal;
  margin-bottom: 0.55em;
}
.post-content li::marker {
  color: var(--accent-orange);
}
.post-content blockquote {
  border-left: 4px solid var(--accent-orange);
  background: rgba(255, 106, 61, 0.07);
  padding: 18px 22px;
  border-radius: 0 14px 14px 0;
  color: var(--text-dark-muted);
  margin: 1.8em 0;
  font-style: normal;
}
.post-content blockquote p {
  margin-bottom: 0;
}
.post-content img {
  border-radius: 14px;
  max-width: 100%;
  height: auto;
  box-shadow: 0 10px 36px rgba(0, 0, 0, 0.12);
  margin: 1.8em 0;
}
.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.8em 0;
  font-size: 14px;
  background: #FFF;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}
.post-content th,
.post-content td {
  border: 1px solid var(--border-light);
  padding: 13px 16px;
  text-align: left;
}
.post-content th {
  background: #EDF1F8;
  font-weight: 700;
  color: var(--text-dark);
}
.post-content td {
  color: var(--text-dark-muted);
}
.post-content tr:hover td {
  background: rgba(0, 224, 198, 0.04);
}
.post-content code {
  background: rgba(10, 15, 30, 0.06);
  padding: 2px 9px;
  border-radius: 6px;
  font-size: 14px;
  font-family: "SFMono-Regular", "Cascadia Code", Consolas, monospace;
  color: #B4532A;
}
.post-content pre {
  background: var(--bg-secondary);
  color: var(--text-primary);
  padding: 22px;
  border-radius: 14px;
  overflow-x: auto;
  margin: 1.8em 0;
  line-height: 1.6;
}
.post-content pre code {
  background: none;
  color: inherit;
  padding: 0;
  font-size: 14px;
}
.post-content hr {
  border: none;
  height: 1px;
  background: var(--border-light);
  margin: 2em 0;
}

/* 内容未找到 */
.not-found {
  text-align: center;
  padding: 80px 20px;
  background: rgba(10, 15, 30, 0.03);
  border-radius: 20px;
}
.not-found i {
  font-size: 48px;
  color: var(--accent-orange);
  margin-bottom: 20px;
}
.not-found p {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 28px;
}

/* 标签区 */
.article-tags {
  display: flex;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 40px;
  padding-top: 26px;
  border-top: 1px solid var(--border-light);
}
.tag-head {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-dark-muted);
  font-size: 14px;
  font-weight: 600;
  padding-top: 6px;
}
.tag {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 999px;
  background: #EDF1F8;
  border: 1px solid var(--border-light);
  color: var(--text-dark-muted);
  font-size: 13px;
  transition: var(--transition);
}
.tag:hover {
  background: rgba(0, 224, 198, 0.12);
  border-color: rgba(0, 224, 198, 0.35);
  color: #078F7B;
}

/* 相关推荐 */
.related-section {
  background: var(--bg-primary);
  padding: 90px 0 70px;
  position: relative;
}
.related-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 224, 198, 0.3), transparent);
}
.section-head .more-link {
  display: block;
  margin-top: 16px;
  color: var(--text-secondary);
  font-size: 14px;
  transition: var(--transition);
}
.section-head .more-link:hover {
  color: var(--accent);
}
.related-grid.row.collapse {
  max-width: 100%;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
}
.related-col {
  padding: 0 16px !important;
  margin-bottom: 36px;
}
.related-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.related-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 224, 198, 0.5);
  box-shadow: var(--shadow-hover);
}
.related-card:focus-visible {
  outline: 3px solid rgba(0, 224, 198, 0.5);
  outline-offset: 3px;
}
.related-cover {
  position: relative;
  min-height: 160px;
  background: linear-gradient(135deg, rgba(0, 224, 198, 0.15), rgba(255, 106, 61, 0.15));
  overflow: hidden;
}
.related-cover img {
  width: 100%;
  height: 170px;
  object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.related-card:hover .related-cover img {
  transform: scale(1.05);
}
.related-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 4px 13px;
  border-radius: 999px;
  background: rgba(10, 15, 30, 0.7);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.related-body {
  padding: 22px 22px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.related-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.45;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-excerpt {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 18px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}
.related-card:hover .related-more {
  gap: 12px;
  color: var(--accent-orange);
}
.related-more i {
  font-size: 12px;
}

/* 返回 CTA */
.back-cta {
  background: linear-gradient(180deg, rgba(10, 15, 30, 0.88), rgba(10, 15, 30, 0.92)), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  padding: 70px 0;
  position: relative;
}
.back-cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 44px 52px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.back-cta-text h2 {
  font-size: clamp(22px, 2.6vw, 32px);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.back-cta-text p {
  color: var(--text-secondary);
  font-size: 15px;
}
.back-cta-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* 页脚 */
.footer {
  background: #070B14;
  padding-top: 70px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.4fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand .footer-logo {
  display: inline-flex;
  align-items: center;
  font-size: 19px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 18px;
}
.footer-brand .footer-logo strong {
  font-weight: 800;
}
.footer-brand p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.8;
  max-width: 360px;
}
.footer-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 10px;
}
.footer-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-orange));
  border-radius: 99px;
}
.footer-links li {
  margin-bottom: 12px;
}
.footer-links a {
  color: var(--text-secondary);
  font-size: 14px;
  transition: var(--transition);
}
.footer-links a:hover {
  color: var(--accent);
  padding-left: 4px;
}
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.footer-contact span {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text-secondary);
  font-size: 14px;
}
.footer-contact i {
  width: 22px;
  color: var(--accent);
  font-size: 14px;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 22px 0 28px;
  color: var(--text-muted);
  font-size: 13px;
}
.footer-copy {
  color: var(--text-muted);
}

/* 响应式 */
@media (max-width: 1024px) {
  .nav-capsule {
    max-width: 100%;
    padding: 10px 12px 10px 20px;
  }
  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: calc(100% + 12px);
    left: 50%;
    transform: translateX(-50%);
    min-width: 260px;
    background: rgba(10, 15, 30, 0.96);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 12px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  }
  .nav-links.open {
    display: flex;
  }
  .nav-links .nav-link,
  .nav-links .nav-cta {
    justify-content: flex-start;
    padding: 12px 16px;
    border-radius: 12px;
    margin-left: 0;
    min-height: 44px;
  }
  .related-col {
    flex: 0 0 50%;
    max-width: 50%;
  }
  .back-cta-inner {
    padding: 36px 32px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}

@media (max-width: 767px) {
  .container {
    padding: 0 16px;
  }
  .header {
    top: 10px;
    padding: 0 12px;
  }
  .nav-capsule {
    gap: 10px;
  }
  .nav-logo {
    font-size: 15px;
  }
  .article-hero {
    padding: 130px 0 180px;
  }
  .article-title {
    font-size: 28px;
  }
  .article-meta {
    gap: 14px;
    font-size: 13px;
  }
  .article-card {
    margin-top: -110px;
    padding: 28px 20px;
    border-radius: 18px;
  }
  .post-cover {
    min-height: 160px;
    margin-bottom: 28px;
  }
  .post-content {
    font-size: 15px;
  }
  .post-content h2 {
    font-size: 21px;
  }
  .post-content h3 {
    font-size: 18px;
  }
  .post-content table {
    font-size: 12px;
  }
  .post-content th,
  .post-content td {
    padding: 10px;
  }
  .related-section {
    padding: 64px 0 40px;
  }
  .related-col {
    flex: 0 0 100%;
    max-width: 100%;
  }
  .back-cta {
    padding: 48px 0;
  }
  .back-cta-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 30px 24px;
  }
  .back-cta-actions {
    width: 100%;
  }
  .back-cta-actions .btn {
    flex: 1;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
    padding-bottom: 36px;
  }
  .footer-bottom {
    flex-direction: column;
    justify-content: center;
    text-align: center;
  }
  .breadcrumb {
    gap: 6px;
    font-size: 12px;
    margin-bottom: 20px;
  }
  .breadcrumb-current {
    max-width: 200px;
  }
}

@media (max-width: 520px) {
  .nav-links {
    min-width: calc(100vw - 40px);
    left: 50%;
    transform: translateX(-50%);
  }
  .article-head-top {
    margin-bottom: 16px;
  }
  .article-meta {
    gap: 12px;
    flex-direction: column;
    align-items: flex-start;
  }
  .not-found {
    padding: 56px 16px;
  }
  .not-found p {
    font-size: 18px;
  }
  .btn {
    padding: 10px 20px;
    font-size: 14px;
  }
}

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

/* roulang page: category1 */
:root {
  --bg-main: #0A0F1E;
  --bg-deep: #111A2E;
  --bg-glass: rgba(255,255,255,0.06);
  --accent: #00E0C6;
  --cta: #FF6A3D;
  --text-main: #EAF0FF;
  --text-sub: #9AA8C7;
  --text-dim: #64708C;
  --border: rgba(255,255,255,0.12);
  --border-bright: rgba(0,224,198,0.5);
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-pill: 999px;
  --shadow-card: 0 10px 40px rgba(0,0,0,0.35);
  --shadow-hover: 0 20px 60px rgba(0,0,0,0.5);
  --transition: all 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
  --container-max: 1280px;
  --section-pad: 96px;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  background: var(--bg-main);
  color: var(--text-main);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a {
  color: var(--accent);
  text-decoration: none;
  transition: var(--transition);
}
a:hover {
  color: #fff;
}
img {
  max-width: 100%;
  display: block;
}
button, input {
  font-family: inherit;
}
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding-block: var(--section-pad);
}
.section-head {
  text-align: center;
  margin-bottom: 56px;
}
.section-head h2 {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-main);
  position: relative;
  display: inline-block;
  padding-bottom: 14px;
}
.section-head h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 48px;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--cta), var(--accent));
}
.section-head p {
  margin-top: 14px;
  color: var(--text-sub);
  font-size: 16px;
}
h1, h2, h3, h4 {
  line-height: 1.3;
}
/* ===== Header 胶囊导航 ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  display: flex;
  justify-content: center;
  padding: 16px 24px 0;
  pointer-events: none;
}
.nav-capsule {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 760px;
  width: 100%;
  padding: 10px 14px 10px 24px;
  background: rgba(10,15,30,0.65);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  box-shadow: 0 8px 32px rgba(0,0,0,0.35);
  pointer-events: auto;
}
.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-main);
  white-space: nowrap;
}
.nav-logo strong {
  font-weight: 800;
  color: var(--text-main);
}
.nav-logo .logo-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
  margin-left: 6px;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.8); }
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-sub);
  position: relative;
  transition: var(--transition);
}
.nav-link:hover,
.nav-link.active {
  color: var(--accent);
  background: rgba(255,255,255,0.05);
}
.nav-link::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), var(--cta));
  transition: var(--transition);
}
.nav-link:hover::after,
.nav-link.active::after {
  transform: translateX(-50%) scaleX(1);
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: 8px;
  padding: 9px 20px;
  border-radius: var(--radius-pill);
  background: var(--cta);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 0 0 1px rgba(255,106,61,0.4), 0 8px 32px rgba(255,106,61,0.35);
  transition: var(--transition);
}
.nav-cta:hover {
  background: #ff7d55;
  transform: translateY(-2px);
  color: #fff;
  box-shadow: 0 0 24px rgba(255,106,61,0.7);
}
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--text-main);
  font-size: 18px;
  cursor: pointer;
  transition: var(--transition);
}
.nav-toggle:hover {
  background: rgba(255,255,255,0.14);
  color: var(--accent);
}
/* ===== Hero 分类横幅 ===== */
.hero {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  padding: 180px 0 110px;
  background:
    linear-gradient(180deg, rgba(10,15,30,0.78), #0A0F1E 88%),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
}
.hero-inner {
  max-width: 760px;
}
.hero-center {
  margin: 0 auto;
  text-align: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  border-radius: var(--radius-pill);
  background: rgba(0,224,198,0.12);
  border: 1px solid rgba(0,224,198,0.35);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(36px, 5.5vw, 64px);
  font-weight: 800;
  line-height: 1.15;
  color: var(--text-main);
  letter-spacing: 1px;
}
.hero h1 span {
  color: var(--accent);
}
.hero p {
  margin-top: 20px;
  font-size: 17px;
  line-height: 1.75;
  color: var(--text-sub);
  max-width: 620px;
}
.hero-center p {
  margin-left: auto;
  margin-right: auto;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
  justify-content: center;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 28px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}
.btn-primary {
  background: var(--cta);
  color: #fff;
  box-shadow: 0 0 0 1px rgba(255,106,61,0.4), 0 8px 32px rgba(255,106,61,0.35);
}
.btn-primary:hover {
  background: #ff7d55;
  transform: translateY(-2px);
  color: #fff;
  box-shadow: 0 0 24px rgba(255,106,61,0.7);
}
.btn-ghost {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  color: var(--text-main);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--accent);
  color: var(--accent);
}
/* ===== 分类介绍区 ===== */
.intro-section {
  background: #F5F7FC;
  color: #1a2438;
}
.intro-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: center;
}
.intro-grid h2 {
  font-size: clamp(24px, 2.6vw, 34px);
  color: #111A2E;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 20px;
}
.intro-grid p {
  font-size: 16px;
  line-height: 1.8;
  color: #44536e;
}
.intro-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  background: #fff;
  border: 1px solid #dbe2f0;
  color: #1a2438;
  font-size: 14px;
  font-weight: 500;
  box-shadow: 0 4px 16px rgba(10,15,30,0.06);
  transition: var(--transition);
}
.tag i {
  color: var(--cta);
}
.tag:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
/* ===== 卡片网格 ===== */
.cards-section {
  background: var(--bg-main);
}
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.cat-card {
  position: relative;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.cat-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-bright);
  box-shadow: var(--shadow-hover);
}
.cards-grid .cat-card:nth-child(1),
.cards-grid .cat-card:nth-child(4) {
  margin-top: 28px;
}
.card-media {
  position: relative;
  height: 190px;
  overflow: hidden;
  min-height: 190px;
}
.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.cat-card:hover .card-media img {
  transform: scale(1.05);
}
.card-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10,15,30,0), rgba(10,15,30,0.25));
}
.card-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.card-tag {
  display: inline-flex;
  align-self: flex-start;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: rgba(0,224,198,0.12);
  border: 1px solid rgba(0,224,198,0.3);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 14px;
}
.card-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
}
.card-excerpt {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 18px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
}
.card-link i {
  transition: transform 0.25s ease;
}
.card-link:hover {
  color: var(--cta);
}
.card-link:hover i {
  transform: translateX(4px);
}
/* ===== 登录流程 ===== */
.steps-section {
  background: var(--bg-deep);
  position: relative;
}
.steps-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,106,61,0.03), rgba(0,224,198,0.03));
  pointer-events: none;
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
}
.step-card {
  position: relative;
  padding: 32px 28px;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  text-align: center;
  transition: var(--transition);
}
.step-card:hover {
  border-color: var(--border-bright);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.step-num {
  width: 56px;
  height: 56px;
  margin: 0 auto 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(0,224,198,0.2), rgba(255,106,61,0.2));
  border: 1px solid rgba(0,224,198,0.4);
  color: var(--accent);
  font-size: 18px;
  font-weight: 700;
  font-family: "DIN Alternate", "Rajdhani", "PingFang SC", sans-serif;
}
.step-card h3 {
  font-size: 18px;
  color: var(--text-main);
  margin-bottom: 10px;
}
.step-card p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
}
/* ===== 保障条 ===== */
.trust-section {
  background: var(--bg-main);
}
.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.trust-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 24px;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(14px);
  transition: var(--transition);
}
.trust-item:hover {
  border-color: var(--border-bright);
}
.trust-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(0,224,198,0.12);
  color: var(--accent);
  font-size: 18px;
}
.trust-item h3 {
  font-size: 16px;
  color: var(--text-main);
  margin-bottom: 4px;
}
.trust-item p {
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.6;
}
/* ===== FAQ ===== */
.faq-section {
  background: var(--bg-deep);
}
.accordion {
  list-style: none;
  margin: 0;
  padding: 0;
  max-width: 860px;
  margin-inline: auto;
}
.accordion-item {
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: 14px;
  margin-bottom: 16px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  overflow: hidden;
  transition: var(--transition);
}
.accordion-item.is-active {
  border-color: var(--border-bright);
  background: rgba(255,255,255,0.08);
}
.accordion-title {
  position: relative;
  display: flex;
  align-items: center;
  padding: 20px 24px;
  color: var(--text-main);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  transition: var(--transition);
}
.accordion-title:hover {
  color: var(--accent);
  background: rgba(255,255,255,0.03);
}
.accordion-title::before {
  content: "\f067";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  color: var(--cta);
  font-size: 14px;
  margin-right: 16px;
  flex-shrink: 0;
  transition: transform 0.3s ease;
}
.accordion-item.is-active .accordion-title::before {
  content: "\f068";
  transform: rotate(180deg);
}
.accordion-content {
  padding: 0 24px 20px 54px;
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.75;
}
.accordion-content p {
  margin: 0;
}
/* ===== CTA区 ===== */
.cta-section {
  position: relative;
  padding: 72px 0;
  background:
    linear-gradient(180deg, rgba(10,15,30,0.88), rgba(10,15,30,0.92)),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  text-align: center;
}
.cta-inner {
  max-width: 640px;
  margin: 0 auto;
}
.cta-inner h2 {
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
}
.cta-inner h2 span {
  color: var(--accent);
}
.cta-inner p {
  font-size: 16px;
  color: var(--text-sub);
  margin-bottom: 28px;
}
.cta-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}
/* ===== Footer ===== */
.footer {
  background: #070b14;
  padding: 64px 0 0;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-logo {
  display: inline-flex;
  align-items: center;
  font-size: 18px;
  font-weight: 500;
  color: var(--text-main);
  margin-bottom: 16px;
}
.footer-logo strong {
  font-weight: 800;
}
.footer-logo .logo-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
  margin-left: 6px;
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.75;
  max-width: 340px;
}
.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 16px;
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  color: var(--text-sub);
  font-size: 14px;
  transition: var(--transition);
}
.footer-links a:hover {
  color: var(--accent);
  padding-left: 4px;
}
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-contact span {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-sub);
}
.footer-contact i {
  color: var(--accent);
  width: 18px;
  text-align: center;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 22px 0;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.footer-copy {
  font-size: 13px;
  color: var(--text-dim);
}
.footer-icp {
  font-size: 13px;
  color: var(--text-dim);
}
/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .intro-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}
@media (max-width: 768px) {
  :root {
    --section-pad: 64px;
  }
  .header {
    padding: 12px 16px 0;
  }
  .nav-capsule {
    padding: 8px 12px 8px 18px;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: rgba(10,15,30,0.96);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 12px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  }
  .nav-links.open {
    display: flex;
  }
  .nav-link {
    justify-content: center;
    padding: 12px 16px;
  }
  .nav-cta {
    margin: 8px 0 0;
    justify-content: center;
  }
  .hero {
    min-height: auto;
    padding: 140px 0 80px;
  }
  .hero-actions {
    justify-content: center;
  }
  .steps-grid {
    grid-template-columns: 1fr;
  }
  .trust-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}
@media (max-width: 640px) {
  .container {
    padding: 0 16px;
  }
  .cards-grid {
    grid-template-columns: 1fr;
  }
  .cards-grid .cat-card:nth-child(1),
  .cards-grid .cat-card:nth-child(4) {
    margin-top: 0;
  }
  .intro-tags {
    justify-content: center;
  }
  .section-head {
    margin-bottom: 36px;
  }
  .btn {
    width: 100%;
  }
  .card-media {
    height: 160px;
    min-height: 160px;
  }
}