/* roulang page: index */
/* ========== 设计变量 ========== */
:root {
  --primary: #6C5CE7;
  --primary-dark: #5546C9;
  --primary-light: #8B7FF7;
  --secondary: #00D2FF;
  --secondary-dark: #00B5E0;
  --accent: #FF6B81;
  --dark-1: #0B0E1E;
  --dark-2: #121734;
  --dark-3: #1B2140;
  --light-bg: #F5F6FC;
  --light-bg-2: #EDEFFA;
  --card-bg: #FFFFFF;
  --text-main: #161A2E;
  --text-muted: #61678B;
  --text-light: #A7AED4;
  --border: #E2E5F3;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 4px 16px rgba(22, 26, 58, 0.06);
  --shadow-md: 0 12px 36px rgba(22, 26, 58, 0.09);
  --shadow-lg: 0 24px 64px rgba(22, 26, 58, 0.14);
  --shadow-primary: 0 10px 30px rgba(108, 92, 231, 0.35);
  --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --container-width: 1200px;
}

/* ========== 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", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-main);
  background: var(--light-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; background: none; }
button { cursor: pointer; }
i { display: inline-block; }

/* ========== 容器与排版 ========== */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}
.section { padding: 96px 0; position: relative; }
.section-gray { background: var(--light-bg); }
.section-white { background: #FFFFFF; }
.section-header {
  max-width: 680px;
  margin: 0 auto 56px;
  text-align: center;
}
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--primary);
  text-transform: uppercase;
  background: rgba(108, 92, 231, 0.08);
  border-radius: 100px;
  padding: 6px 18px;
  margin-bottom: 16px;
}
.section-eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 50%;
}
.section-header h2 {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-main);
  letter-spacing: -0.02em;
}
.section-header p {
  margin-top: 16px;
  font-size: 17px;
  color: var(--text-muted);
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 13px 30px;
  transition: var(--transition);
  border: 2px solid transparent;
  line-height: 1.4;
  white-space: nowrap;
}
.btn i { font-size: 14px; }
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-primary);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 14px 40px rgba(108, 92, 231, 0.45);
}
.btn-secondary {
  background: var(--secondary);
  color: var(--dark-1);
}
.btn-secondary:hover {
  background: var(--secondary-dark);
  transform: translateY(-2px);
}
.btn-outline-light {
  border-color: rgba(255, 255, 255, 0.6);
  color: #fff;
}
.btn-outline-light:hover {
  border-color: var(--secondary);
  background: rgba(0, 210, 255, 0.12);
  color: var(--secondary);
  transform: translateY(-2px);
}
.btn-ghost {
  color: var(--text-muted);
  padding: 10px 16px;
}
.btn-ghost:hover { color: var(--primary); background: rgba(108, 92, 231, 0.07); }
.btn-sm { padding: 8px 18px; font-size: 14px; border-radius: 8px; }

/* ========== 顶部导航 ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(11, 14, 30, 0.88);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  transition: var(--transition);
}
.site-header.scrolled {
  background: rgba(11, 14, 30, 0.96);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.logo-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -0.5px;
  box-shadow: 0 6px 20px rgba(108, 92, 231, 0.4);
}
.logo-text {
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.3px;
}
.logo-text span { color: var(--secondary); }
.main-nav { margin-left: 32px; }
.main-nav ul { display: flex; gap: 4px; }
.main-nav a {
  display: block;
  padding: 10px 18px;
  font-size: 15px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.72);
  border-radius: 100px;
  transition: var(--transition);
}
.main-nav a:hover { color: #fff; background: rgba(255, 255, 255, 0.08); }
.main-nav a.active {
  color: var(--secondary);
  background: rgba(0, 210, 255, 0.1);
  font-weight: 600;
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}
.search-box {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 100px;
  padding: 0 8px 0 18px;
  height: 42px;
  width: 220px;
  transition: var(--transition);
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.search-box:focus-within {
  border-color: rgba(0, 210, 255, 0.5);
  background: rgba(255, 255, 255, 0.12);
  box-shadow: 0 0 0 3px rgba(0, 210, 255, 0.15);
}
.search-box input {
  flex: 1;
  color: #fff;
  font-size: 14px;
  background: transparent;
}
.search-box input::placeholder { color: rgba(255, 255, 255, 0.4); }
.search-box button {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.6);
  transition: var(--transition);
}
.search-box button:hover { color: var(--secondary); }
.nav-actions .btn-primary {
  padding: 10px 22px;
  font-size: 14px;
}
.nav-actions .nav-login {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  padding: 10px 12px;
}
.nav-login:hover { color: #fff; }
.mobile-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

/* ========== Hero 首屏 ========== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 120px;
  padding-bottom: 60px;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    130deg,
    rgba(10, 13, 30, 0.95) 0%,
    rgba(12, 16, 42, 0.82) 40%,
    rgba(45, 40, 100, 0.6) 72%,
    rgba(0, 210, 255, 0.25) 100%
  );
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -200px;
  right: -100px;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(108, 92, 231, 0.25) 0%, transparent 60%);
  pointer-events: none;
}
.hero-content {
  text-align: center;
  max-width: 820px;
  margin: 0 auto;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--secondary);
  background: rgba(0, 210, 255, 0.12);
  border: 1px solid rgba(0, 210, 255, 0.25);
  border-radius: 100px;
  padding: 8px 22px;
  margin-bottom: 24px;
  letter-spacing: 1px;
}
.hero-badge i { font-size: 12px; }
.hero h1 {
  font-size: 64px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 20px;
}
.hero h1 span {
  background: linear-gradient(90deg, var(--secondary), var(--primary-light));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-desc {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.8;
  max-width: 640px;
  margin: 0 auto 36px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 64px;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 800px;
  margin: 0 auto;
  padding: 28px 32px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
}
.hero-stat { text-align: center; }
.hero-stat .num {
  font-size: 34px;
  font-weight: 800;
  color: var(--secondary);
  line-height: 1.2;
}
.hero-stat .label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
  margin-top: 4px;
}

/* ========== 核心优势 ========== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}
.feature-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.feature-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-6px);
  border-color: transparent;
}
.feature-card:hover::after { transform: scaleX(1); }
.feature-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 22px;
  color: var(--primary);
  background: rgba(108, 92, 231, 0.1);
}
.feature-card:nth-child(2) .feature-icon { color: var(--secondary); background: rgba(0, 210, 255, 0.1); }
.feature-card:nth-child(3) .feature-icon { color: #FF9F43; background: rgba(255, 159, 67, 0.12); }
.feature-card:nth-child(4) .feature-icon { color: #2ED573; background: rgba(46, 213, 115, 0.12); }
.feature-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-main);
}
.feature-card p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ========== 分类入口 ========== */
.category-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.category-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 380px;
  display: flex;
  align-items: flex-end;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}
.category-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
}
.category-card img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.category-card:hover img { transform: scale(1.05); }
.category-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 14, 30, 0.1) 0%, rgba(11, 14, 30, 0.55) 60%, rgba(11, 14, 30, 0.88) 100%);
}
.category-info {
  position: relative;
  z-index: 1;
  padding: 36px 32px;
  color: #fff;
  width: 100%;
}
.category-info .cat-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--secondary);
  background: rgba(0, 210, 255, 0.15);
  border: 1px solid rgba(0, 210, 255, 0.3);
  border-radius: 100px;
  padding: 4px 14px;
  margin-bottom: 14px;
}
.category-info h3 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 10px;
}
.category-info p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.7;
  margin-bottom: 20px;
}
.category-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}
.category-tags span {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  background: rgba(255, 255, 255, 0.12);
  border-radius: 100px;
  padding: 4px 14px;
}
.category-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--secondary);
  font-size: 14px;
  font-weight: 600;
}
.category-link i { transition: transform 0.3s ease; }
.category-card:hover .category-link i { transform: translateX(5px); }

/* ========== 最新资讯 ========== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.news-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}
.news-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-6px);
  border-color: transparent;
}
.news-card-media {
  width: 100%;
  height: 170px;
  object-fit: cover;
  background: linear-gradient(135deg, var(--dark-2), var(--dark-3));
}
.news-card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.news-badge {
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(108, 92, 231, 0.08);
  border-radius: 6px;
  padding: 3px 10px;
}
.news-date { font-size: 13px; color: var(--text-muted); }
.news-card h3 {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-main);
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-card .news-excerpt {
  font-size: 14px;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 18px;
  flex: 1;
}
.news-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}
.news-more i { font-size: 13px; transition: transform 0.3s ease; }
.news-card:hover .news-more i { transform: translateX(5px); }
.empty-tip {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  font-size: 16px;
  color: var(--text-muted);
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--border);
}

/* ========== 数据看板 ========== */
.stats-band {
  position: relative;
  padding: 100px 0;
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  overflow: hidden;
}
.stats-band::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(11, 14, 30, 0.94) 0%, rgba(20, 16, 48, 0.88) 55%, rgba(0, 170, 220, 0.45) 100%);
}
.stats-band-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  position: relative;
  z-index: 1;
}
.stats-item {
  text-align: center;
  padding: 36px 20px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  transition: var(--transition);
}
.stats-item:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-4px);
}
.stats-num {
  font-size: 50px;
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
  background: linear-gradient(135deg, #fff 20%, var(--secondary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stats-label {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.65);
  margin-top: 8px;
}

/* ========== 服务流程 ========== */
.process-wrap {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  position: relative;
}
.process-wrap::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 12%;
  right: 12%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 50%, var(--primary) 100%);
  opacity: 0.2;
}
.process-step {
  text-align: center;
  position: relative;
}
.step-num {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: var(--card-bg);
  border: 2px solid var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 800;
  color: var(--primary);
  box-shadow: var(--shadow-sm);
  position: relative;
  z-index: 1;
  transition: var(--transition);
}
.process-step:hover .step-num {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 0 0 8px rgba(108, 92, 231, 0.15);
}
.process-step h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 8px;
}
.process-step p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 220px;
  margin: 0 auto;
}

/* ========== FAQ ========== */
.faq-wrap {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover {
  border-color: rgba(108, 92, 231, 0.3);
  box-shadow: var(--shadow-sm);
}
.faq-item summary {
  cursor: pointer;
  padding: 22px 28px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  transition: var(--transition);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '\f078';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  font-size: 14px;
  color: var(--primary);
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: rgba(108, 92, 231, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  flex-shrink: 0;
}
.faq-item[open] summary { color: var(--primary); }
.faq-item[open] summary::after {
  transform: rotate(180deg);
  background: var(--primary);
  color: #fff;
}
.faq-item .faq-answer {
  padding: 0 28px 24px;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ========== CTA ========== */
.cta-section {
  position: relative;
  padding: 100px 0;
  overflow: hidden;
  background: linear-gradient(135deg, var(--dark-2) 0%, #241A5E 55%, rgba(0, 160, 210, 0.6) 100%);
}
.cta-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.06);
  pointer-events: none;
}
.cta-section::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.05);
  pointer-events: none;
}
.cta-content {
  text-align: center;
  position: relative;
  z-index: 2;
  max-width: 700px;
  margin: 0 auto;
}
.cta-content h2 {
  font-size: 40px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}
.cta-content p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: 36px;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ========== 页脚 ========== */
.site-footer {
  background: var(--dark-1);
  color: rgba(255, 255, 255, 0.6);
  padding: 80px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 56px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-brand .logo { margin-bottom: 20px; }
.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.55);
  max-width: 320px;
}
.footer-social {
  display: flex;
  gap: 10px;
  margin-top: 24px;
}
.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  transition: var(--transition);
}
.footer-social a:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-3px);
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 22px;
}
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  transition: var(--transition);
}
.footer-col ul a:hover { color: var(--secondary); padding-left: 4px; }
.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 14px;
  color: rgba(255, 255, 255, 0.55);
}
.footer-contact i { color: var(--secondary); margin-top: 4px; }
.footer-bottom {
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.38);
}
.footer-bottom a { color: rgba(255, 255, 255, 0.38); }
.footer-bottom a:hover { color: var(--secondary); }

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .process-wrap { grid-template-columns: repeat(2, 1fr); gap: 40px; }
  .process-wrap::before { display: none; }
  .stats-band-inner { grid-template-columns: repeat(2, 1fr); }
  .nav-actions .search-box { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 48px; }
  .category-wrap { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .section { padding: 72px 0; }
  .section-header h2 { font-size: 30px; }
  .site-header { padding: 0 16px; }
  .main-nav {
    position: fixed;
    top: 74px;
    left: 0;
    right: 0;
    background: rgba(11, 14, 30, 0.98);
    padding: 16px 24px 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    display: none;
    margin-left: 0;
  }
  .main-nav.open { display: block; }
  .main-nav ul { flex-direction: column; gap: 4px; }
  .main-nav a { padding: 14px; }
  .nav-actions { display: none; }
  .nav-actions.open {
    display: flex;
    position: fixed;
    top: 260px;
    left: 0;
    right: 0;
    background: rgba(11, 14, 30, 0.98);
    padding: 16px 24px 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    flex-wrap: wrap;
    margin-left: 0;
  }
  .nav-actions.open .search-box { display: flex; width: 100%; margin-bottom: 8px; }
  .mobile-toggle { display: flex; }
  .hero { padding-top: 120px; }
  .hero h1 { font-size: 38px; }
  .hero-desc { font-size: 16px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 20px; padding: 24px; }
  .feature-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .stats-band-inner { grid-template-columns: 1fr; }
  .process-wrap { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-content h2 { font-size: 30px; }
  .category-card { min-height: 320px; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .logo-text { font-size: 18px; }
  .logo-icon { width: 36px; height: 36px; font-size: 13px; }
  .hero h1 { font-size: 32px; }
  .hero .btn { width: 100%; }
  .section-header h2 { font-size: 26px; }
  .news-card-media { height: 150px; }
  .category-info { padding: 24px 20px; }
  .category-info h3 { font-size: 22px; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-actions .btn { width: 100%; }
}

/* ========== 动画辅助 ========== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in-up { animation: fadeInUp 0.7s ease both; }
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }

/* roulang page: category1 */
:root {
  --primary: #00e5ff;
  --primary-dim: #009bb8;
  --primary-glow: rgba(0, 229, 255, 0.35);
  --secondary: #7b61ff;
  --secondary-glow: rgba(123, 97, 255, 0.3);
  --accent: #ff3d81;
  --bg-dark: #0a0e19;
  --bg-panel: #111827;
  --bg-card: #151d30;
  --bg-card-hover: #1b2540;
  --text-main: #eef2ff;
  --text-dim: #8b95ad;
  --border-subtle: rgba(255, 255, 255, 0.07);
  --border-glow: rgba(0, 229, 255, 0.22);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-card: 0 16px 44px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 22px 60px rgba(0, 0, 0, 0.5);
  --space-section: 96px;
  --space-block: 56px;
  --transition: 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; transition: color var(--transition); }
img { max-width: 100%; display: block; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
section { position: relative; }

/* 头部导航 */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(10, 14, 25, 0.72);
  backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border-subtle);
  transition: box-shadow 0.4s ease, background 0.4s ease;
}
.site-header.scrolled {
  background: rgba(10, 14, 25, 0.92);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.45);
}
.header-inner {
  display: flex; align-items: center; gap: 32px;
  height: 72px;
}
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-icon {
  width: 38px; height: 38px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  font-size: 14px; font-weight: 800; color: #fff;
  letter-spacing: 0.5px; box-shadow: 0 0 24px var(--primary-glow);
}
.logo-text { font-size: 20px; font-weight: 800; color: var(--text-main); letter-spacing: 0.5px; }
.logo-text span { color: var(--primary); font-weight: 400; margin-left: 2px; }
.main-nav { flex: 1; display: flex; justify-content: center; }
.main-nav ul { display: flex; gap: 8px; list-style: none; }
.main-nav a {
  display: block; padding: 8px 20px; border-radius: 20px;
  font-size: 15px; font-weight: 500; color: var(--text-dim);
  transition: all var(--transition);
}
.main-nav a:hover { color: var(--text-main); background: rgba(255, 255, 255, 0.06); }
.main-nav a.active {
  color: var(--primary);
  background: rgba(0, 229, 255, 0.1);
  box-shadow: inset 0 0 0 1px rgba(0, 229, 255, 0.25);
}
.header-actions { display: flex; align-items: center; gap: 16px; flex-shrink: 0; }
.header-search { display: flex; align-items: center; background: rgba(255, 255, 255, 0.06); border-radius: 22px; padding: 0 6px 0 16px; height: 40px; border: 1px solid transparent; transition: border-color 0.3s; }
.header-search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.14); }
.header-search input { background: transparent; border: none; outline: none; color: var(--text-main); font-size: 14px; width: 132px; }
.header-search input::placeholder { color: var(--text-dim); }
.header-search button { background: linear-gradient(135deg, var(--primary), var(--secondary)); color: #fff; border: none; width: 30px; height: 30px; border-radius: 50%; cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 13px; transition: transform 0.2s; }
.header-search button:hover { transform: scale(1.08); }
.nav-toggle { display: none; background: none; border: none; color: var(--text-main); font-size: 22px; cursor: pointer; padding: 6px; }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border-radius: 26px; padding: 10px 24px;
  font-size: 15px; font-weight: 600; letter-spacing: 0.3px;
  border: none; cursor: pointer; transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff; box-shadow: 0 6px 24px rgba(0, 229, 255, 0.28);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 34px rgba(0, 229, 255, 0.42); }
.btn-ghost {
  background: transparent; color: var(--text-main);
  border: 1px solid rgba(255, 255, 255, 0.2);
}
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); background: rgba(0, 229, 255, 0.06); }
.btn-lg { padding: 14px 38px; font-size: 16px; border-radius: 30px; }
.btn-sm { padding: 8px 18px; font-size: 13px; }

/* 页面 Banner */
.page-hero {
  min-height: 420px;
  display: flex; align-items: center;
  padding: 140px 0 80px;
  background: linear-gradient(135deg, rgba(8, 12, 24, 0.94), rgba(18, 26, 48, 0.78)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  border-bottom: 1px solid var(--border-subtle);
  overflow: hidden;
}
.page-hero::after {
  content: ''; position: absolute; right: -80px; top: -80px; width: 360px; height: 360px;
  background: radial-gradient(circle, var(--primary-glow), transparent 70%);
  pointer-events: none;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(0, 229, 255, 0.12); color: var(--primary);
  border: 1px solid rgba(0, 229, 255, 0.28);
  font-size: 13px; font-weight: 600; letter-spacing: 1px;
  padding: 6px 18px; border-radius: 30px; margin-bottom: 24px;
}
.page-hero h1 {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 800; line-height: 1.2; letter-spacing: 0.5px;
  margin-bottom: 20px;
}
.page-hero h1 em { font-style: normal; background: linear-gradient(90deg, var(--primary), var(--secondary)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.page-hero p.lead { font-size: 16px; color: var(--text-dim); max-width: 640px; margin-bottom: 34px; line-height: 1.8; }
.hero-actions { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }

/* 数据横条 */
.stats-strip {
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border-subtle);
  padding: 32px 0;
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.stat-item { text-align: center; border-right: 1px solid var(--border-subtle); padding: 8px 8px; }
.stat-item:last-child { border-right: none; }
.stat-number {
  font-size: 34px; font-weight: 800; color: var(--text-main);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  line-height: 1.2;
}
.stat-label { font-size: 14px; color: var(--text-dim); margin-top: 6px; letter-spacing: 1px; }

/* 板块通用 */
.section-block { padding: var(--space-section) 0; }
.section-tag {
  display: inline-block; background: rgba(123, 97, 255, 0.12);
  color: var(--secondary); border: 1px solid rgba(123, 97, 255, 0.22);
  font-size: 12px; font-weight: 700; letter-spacing: 2px;
  padding: 5px 16px; border-radius: 20px; margin-bottom: 16px;
}
.section-title { font-size: clamp(26px, 3.4vw, 38px); font-weight: 800; line-height: 1.3; margin-bottom: 18px; letter-spacing: 0.3px; }
.section-sub { font-size: 16px; color: var(--text-dim); max-width: 720px; line-height: 1.8; }
.section-head { margin-bottom: 52px; }
.section-head.center { text-align: center; }
.section-head.center .section-sub { margin: 0 auto; }

/* 特性卡片 */
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.feature-card {
  background: var(--bg-card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); padding: 34px 26px;
  transition: all var(--transition);
  position: relative; overflow: hidden;
}
.feature-card::before {
  content: ''; position: absolute; left: 0; top: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0; transition: opacity 0.35s;
}
.feature-card:hover { background: var(--bg-card-hover); transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: var(--border-glow); }
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 54px; height: 54px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; color: var(--primary);
  background: rgba(0, 229, 255, 0.1); margin-bottom: 22px;
  transition: transform var(--transition);
}
.feature-card:hover .feature-icon { transform: scale(1.1); }
.feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 12px; }
.feature-card p { font-size: 14px; color: var(--text-dim); line-height: 1.8; }

/* 场景卡片带图 */
.scene-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.scene-card {
  background: var(--bg-card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); overflow: hidden;
  display: flex; transition: all var(--transition);
}
.scene-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: var(--border-glow); }
.scene-img { width: 44%; min-height: 220px; overflow: hidden; position: relative; }
.scene-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
.scene-card:hover .scene-img img { transform: scale(1.06); }
.scene-img::after { content: ''; position: absolute; inset: 0; background: linear-gradient(90deg, transparent 30%, rgba(21, 29, 48, 0.55)); }
.scene-body { flex: 1; padding: 28px 26px; display: flex; flex-direction: column; justify-content: center; }
.scene-body h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; }
.scene-body p { font-size: 14px; color: var(--text-dim); line-height: 1.8; margin-bottom: 16px; }
.scene-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.scene-tags span {
  font-size: 12px; color: var(--text-dim);
  background: rgba(255, 255, 255, 0.05); border: 1px solid var(--border-subtle);
  padding: 3px 12px; border-radius: 16px;
}

/* 技术优势图文分栏 */
.split-section { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.split-media { position: relative; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-card); }
.split-media img { width: 100%; height: 100%; object-fit: cover; min-height: 380px; }
.split-media::after { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(10, 14, 25, 0.2), rgba(10, 14, 25, 0.5)); }
.media-badge {
  position: absolute; bottom: 20px; left: 20px; z-index: 2;
  background: rgba(20, 28, 48, 0.85); backdrop-filter: blur(8px);
  border: 1px solid rgba(0, 229, 255, 0.3);
  border-radius: 12px; padding: 14px 22px;
  display: flex; align-items: center; gap: 14px;
}
.media-badge i { font-size: 22px; color: var(--primary); }
.media-badge .b-text b { display: block; font-size: 16px; color: var(--text-main); }
.media-badge .b-text span { font-size: 12px; color: var(--text-dim); }
.split-content .check-list { list-style: none; margin-top: 28px; }
.split-content .check-list li {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 14px 0; border-bottom: 1px solid var(--border-subtle);
  font-size: 15px; color: var(--text-main);
}
.split-content .check-list li:last-child { border-bottom: none; }
.split-content .check-list i { color: var(--primary); margin-top: 4px; font-size: 15px; }
.split-content .check-list b { display: block; font-weight: 600; margin-bottom: 2px; }
.split-content .check-list span { font-size: 13px; color: var(--text-dim); }

/* 流程步骤 */
.process-wrap { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; counter-reset: step-counter; }
.process-card {
  background: var(--bg-card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); padding: 40px 30px;
  position: relative; transition: all var(--transition);
}
.process-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: var(--border-glow); }
.process-num {
  width: 48px; height: 48px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 800; color: var(--primary);
  background: rgba(0, 229, 255, 0.08); border: 1px solid rgba(0, 229, 255, 0.3);
  margin-bottom: 22px;
}
.process-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.process-card p { font-size: 14px; color: var(--text-dim); line-height: 1.8; }
.process-step { font-size: 12px; color: var(--accent); font-weight: 700; letter-spacing: 2px; margin-bottom: 8px; text-transform: uppercase; }

/* FAQ 区块 */
.faq-wrap { max-width: 860px; margin: 0 auto; }
.faq-item {
  background: var(--bg-card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); margin-bottom: 16px;
  overflow: hidden; transition: border-color var(--transition);
}
.faq-item:hover { border-color: var(--border-glow); }
.faq-item.open { border-color: rgba(0, 229, 255, 0.4); }
.faq-question {
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  padding: 20px 26px; cursor: pointer;
  font-size: 16px; font-weight: 600; color: var(--text-main);
  user-select: none;
}
.faq-question .faq-icon {
  flex-shrink: 0; width: 30px; height: 30px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0, 229, 255, 0.1); color: var(--primary);
  font-size: 13px; transition: transform var(--transition);
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height 0.4s ease;
}
.faq-answer-inner { padding: 0 26px 24px; font-size: 14px; color: var(--text-dim); line-height: 1.9; }

/* CTA 区块 */
.cta-section {
  padding: 80px 0; position: relative; overflow: hidden;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.08), rgba(123, 97, 255, 0.12));
  border-top: 1px solid var(--border-subtle); border-bottom: 1px solid var(--border-subtle);
}
.cta-box {
  max-width: 900px; margin: 0 auto; text-align: center;
  background: rgba(17, 24, 39, 0.7); backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle); border-radius: 28px;
  padding: 60px 40px; box-shadow: var(--shadow-card);
}
.cta-box h2 { font-size: clamp(24px, 3vw, 34px); font-weight: 800; margin-bottom: 16px; }
.cta-box p { color: var(--text-dim); font-size: 15px; max-width: 560px; margin: 0 auto 32px; line-height: 1.8; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.cta-meta { margin-top: 28px; display: flex; justify-content: center; gap: 28px; flex-wrap: wrap; font-size: 13px; color: var(--text-dim); }
.cta-meta i { color: var(--primary); margin-right: 6px; }

/* 页脚 */
.site-footer {
  background: #070b14; border-top: 1px solid var(--border-subtle);
  padding: 64px 0 24px;
}
.footer-grid { display: grid; grid-template-columns: 1.6fr 0.8fr 0.8fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-brand .logo { margin-bottom: 18px; }
.footer-brand p { font-size: 14px; color: var(--text-dim); line-height: 1.9; margin-bottom: 22px; max-width: 360px; }
.footer-social { display: flex; gap: 12px; }
.footer-social a {
  width: 38px; height: 38px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255, 255, 255, 0.06); color: var(--text-dim);
  font-size: 16px; transition: all var(--transition);
}
.footer-social a:hover { background: var(--primary); color: #0a0e19; transform: translateY(-3px); }
.footer-col h4 { font-size: 16px; font-weight: 700; color: var(--text-main); margin-bottom: 20px; letter-spacing: 0.5px; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 12px; }
.footer-col a { font-size: 14px; color: var(--text-dim); transition: all var(--transition); }
.footer-col a:hover { color: var(--primary); padding-left: 4px; }
.footer-contact li { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--text-dim); }
.footer-contact i { color: var(--primary); width: 18px; text-align: center; }
.footer-bottom {
  border-top: 1px solid var(--border-subtle); padding-top: 24px;
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  font-size: 13px; color: var(--text-dim); flex-wrap: wrap;
}
.footer-bottom a { color: var(--text-dim); }
.footer-bottom a:hover { color: var(--primary); }

/* 移动端适配 */
@media (max-width: 1024px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .stat-item:nth-child(2) { border-right: none; }
  .stat-item:nth-child(n+3) { border-top: 1px solid var(--border-subtle); }
  .scene-grid { grid-template-columns: 1fr; }
  .split-section { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .header-search { display: none; }
}
@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .main-nav {
    position: absolute; top: 72px; left: 0; right: 0;
    background: rgba(10, 14, 25, 0.98);
    border-bottom: 1px solid var(--border-subtle);
    max-height: 0; overflow: hidden; transition: max-height 0.5s ease;
  }
  .main-nav.open { max-height: 360px; }
  .main-nav ul { flex-direction: column; padding: 12px 20px 20px; gap: 4px; }
  .main-nav a { text-align: center; font-size: 15px; }
  .header-actions .btn-sm { display: none; }
  .page-hero { min-height: 360px; padding: 120px 0 56px; }
  .process-wrap { grid-template-columns: 1fr; }
  .section-block { padding: 68px 0; }
  .scene-card { flex-direction: column; }
  .scene-img { width: 100%; min-height: 180px; }
  .scene-img::after { background: linear-gradient(180deg, transparent 30%, rgba(21, 29, 48, 0.5)); }
  .cta-box { padding: 44px 20px; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .feature-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat-item { border-right: none; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .page-hero h1 { font-size: 28px; }
  .hero-actions .btn { width: 100%; }
  .cta-actions .btn { width: 100%; }
}

/* 动画 */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* 滚动条 */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #0a0e19; }
::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.15); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary-dim); }
::selection { background: rgba(0, 229, 255, 0.3); }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
:root {
  --bg-deep: #070b14;
  --bg-body: #0a0e17;
  --bg-elevated: #111a2c;
  --bg-card: #0f1728;
  --bg-card-hover: #16213a;
  --bg-input: #0d1522;
  --text-primary: #e8ecf4;
  --text-secondary: #9aa8bd;
  --text-muted: #5d6b82;
  --border: rgba(148,163,184,.12);
  --border-strong: rgba(148,163,184,.25);
  --primary: #00e5ff;
  --primary-dark: #00b8d4;
  --secondary: #a855f7;
  --accent: #ff2d95;
  --success: #00e07a;
  --warning: #ffb200;
  --danger: #ff4d6a;
  --gradient-brand: linear-gradient(135deg,#00e5ff 0%,#a855f7 100%);
  --gradient-hero: linear-gradient(135deg,rgba(0,229,255,.14) 0%,rgba(168,85,247,.12) 50%,rgba(255,45,149,.06) 100%);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;
  --shadow-sm: 0 4px 16px rgba(0,0,0,.35);
  --shadow-md: 0 10px 36px rgba(0,0,0,.45);
  --shadow-glow: 0 0 24px rgba(0,229,255,.16);
  --shadow-glow-secondary: 0 0 24px rgba(168,85,247,.16);
  --transition: all .3s cubic-bezier(.4,0,.2,1);
  --container: 1200px;
  --spacing-section: clamp(64px, 8vw, 110px);
}

/* ===== Reset / Base ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input { font-family: inherit; border: none; outline: none; background: none; color: inherit; }
::selection { background: rgba(0,229,255,.25); color: #fff; }

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

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  transition: var(--transition);
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-sm { padding: 8px 20px; font-size: 14px; }
.btn-lg { padding: 16px 40px; font-size: 16px; }
.btn i { font-size: 14px; }

.btn-primary {
  background: var(--gradient-brand);
  color: #0a0e17;
  box-shadow: 0 4px 18px rgba(0,229,255,.25);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,229,255,.35);
}
.btn-primary:active { transform: translateY(0); }

.btn-outline {
  border-color: var(--border-strong);
  color: var(--text-primary);
  background: rgba(255,255,255,.04);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(0,229,255,.08);
  transform: translateY(-2px);
}

.btn-light {
  background: #fff;
  color: #0a0e17;
}
.btn-light:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(255,255,255,.2); }

.btn-glow {
  background: var(--gradient-brand);
  color: #0a0e17;
  box-shadow: 0 0 30px rgba(0,229,255,.3);
}
.btn-glow:hover { transform: translateY(-2px) scale(1.02); box-shadow: 0 0 40px rgba(0,229,255,.45); }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10,14,23,.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.site-header.scrolled {
  box-shadow: 0 8px 30px rgba(0,0,0,.5);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 74px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 17px;
  color: #0a0e17;
  box-shadow: 0 0 16px rgba(0,229,255,.35);
}
.logo-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .5px;
  color: var(--text-primary);
  line-height: 1.1;
}
.logo-text span {
  color: var(--primary);
  font-weight: 800;
}

.main-nav { flex: 1; }
.main-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
}
.main-nav ul li a {
  display: block;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
}
.main-nav ul li a:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,.06);
}
.main-nav ul li a.active {
  color: var(--primary);
  background: rgba(0,229,255,.1);
  box-shadow: inset 0 0 0 1px rgba(0,229,255,.2);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}
.search-box {
  position: relative;
  display: flex;
  align-items: center;
}
.search-box i {
  position: absolute;
  left: 14px;
  font-size: 13px;
  color: var(--text-muted);
}
.search-box input {
  width: 180px;
  height: 38px;
  padding: 0 16px 0 38px;
  border-radius: var(--radius-pill);
  background: var(--bg-input);
  border: 1px solid var(--border);
  font-size: 13px;
  transition: var(--transition);
}
.search-box input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0,229,255,.15);
  width: 220px;
}
.search-box input::placeholder { color: var(--text-muted); }

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--text-primary);
}

/* ===== Hero / Page Banner ===== */
.hero-banner {
  position: relative;
  padding: 100px 0 90px;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  background-attachment: fixed;
  overflow: hidden;
}
.hero-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(7,11,20,.92) 30%, rgba(10,14,23,.75) 60%, rgba(10,14,23,.55) 100%);
  z-index: 1;
}
.hero-banner::after {
  content: '';
  position: absolute;
  top: -120px;
  right: -120px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0,229,255,.2) 0%, transparent 70%);
  z-index: 1;
}
.hero-banner .container { position: relative; z-index: 2; }

.page-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.page-breadcrumb a { color: var(--text-secondary); }
.page-breadcrumb a:hover { color: var(--primary); }
.page-breadcrumb i { font-size: 11px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 18px;
  border-radius: var(--radius-pill);
  background: rgba(0,229,255,.1);
  border: 1px solid rgba(0,229,255,.25);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 24px;
}
.hero-badge i { font-size: 14px; }

.hero-title {
  font-size: clamp(34px, 5vw, 58px);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 22px;
  letter-spacing: 1px;
}
.hero-title .gradient-text {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 720px;
  line-height: 1.8;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  padding: 24px 0;
  border-top: 1px solid var(--border);
  max-width: 800px;
}
.hero-stat {
  padding: 12px 8px;
}
.hero-stat .number {
  font-size: 30px;
  font-weight: 800;
  line-height: 1.2;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-stat .label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ===== 通用 Section ===== */
.section {
  padding: var(--spacing-section) 0;
  position: relative;
}
.section-header {
  max-width: 720px;
  margin-bottom: 48px;
}
.section-header.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.section-tag::before {
  content: '';
  width: 24px;
  height: 2px;
  background: var(--gradient-brand);
  border-radius: 2px;
}
.section-header.center .section-tag::after {
  content: '';
  width: 24px;
  height: 2px;
  background: var(--gradient-brand);
  border-radius: 2px;
}
.section-title {
  font-size: clamp(26px, 3.5vw, 42px);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: .5px;
}
.section-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ===== 挑战区块 ===== */
.challenges-section {
  background: var(--bg-deep);
}
.challenge-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.challenge-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  position: relative;
  transition: var(--transition);
  overflow: hidden;
}
.challenge-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-brand);
  opacity: 0;
  transition: var(--transition);
}
.challenge-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
  background: var(--bg-card-hover);
}
.challenge-card:hover::before { opacity: 1; }
.challenge-icon {
  width: 58px;
  height: 58px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 20px;
  background: rgba(0,229,255,.1);
  color: var(--primary);
}
.challenge-card:nth-child(2) .challenge-icon { background: rgba(168,85,247,.12); color: var(--secondary); }
.challenge-card:nth-child(3) .challenge-icon { background: rgba(255,178,0,.1); color: var(--warning); }
.challenge-card:nth-child(4) .challenge-icon { background: rgba(255,77,106,.1); color: var(--danger); }
.challenge-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
}
.challenge-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ===== 行业场景 ===== */
.industry-section {
  background: var(--bg-body);
}
.industry-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.industry-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}
.industry-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
  border-color: rgba(0,229,255,.2);
}
.industry-img {
  position: relative;
  height: 200px;
  overflow: hidden;
}
.industry-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .6s ease;
}
.industry-card:hover .industry-img img { transform: scale(1.05); }
.industry-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(7,11,20,.85) 0%, transparent 50%);
}
.industry-tag {
  position: absolute;
  bottom: 14px;
  left: 18px;
  z-index: 2;
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  background: rgba(0,229,255,.15);
  border: 1px solid rgba(0,229,255,.3);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  backdrop-filter: blur(8px);
}
.industry-body {
  padding: 24px 24px 28px;
}
.industry-body h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
}
.industry-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.industry-list {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.industry-list li {
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-secondary);
}

/* ===== 流程区块 ===== */
.process-section {
  background: var(--bg-deep);
}
.process-wrap {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}
.process-step {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 28px;
  transition: var(--transition);
}
.process-step:hover {
  transform: translateY(-4px);
  border-color: rgba(168,85,247,.35);
  box-shadow: var(--shadow-glow-secondary);
}
.process-number {
  font-size: 52px;
  font-weight: 800;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(0,229,255,.5);
  margin-bottom: 18px;
  font-style: italic;
}
.process-step h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
}
.process-step p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.process-line {
  position: absolute;
  top: 60px;
  right: -24px;
  width: 24px;
  height: 2px;
  background: linear-gradient(90deg, rgba(0,229,255,.4), transparent);
}
.process-step:last-child .process-line { display: none; }

/* ===== 技术优势 ===== */
.tech-section { background: var(--bg-body); }
.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.tech-card {
  background: linear-gradient(135deg, rgba(0,229,255,.05), rgba(168,85,247,.05));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  transition: var(--transition);
  display: flex;
  align-items: flex-start;
  gap: 20px;
}
.tech-card:hover {
  border-color: rgba(0,229,255,.25);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}
.tech-value {
  font-size: 30px;
  font-weight: 800;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
  white-space: nowrap;
}
.tech-body h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}
.tech-body p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== 资讯列表 ===== */
.insights-section { background: var(--bg-deep); }
.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.article-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}
.article-cover {
  position: relative;
  height: 180px;
  overflow: hidden;
}
.article-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .6s ease;
}
.article-card:hover .article-cover img { transform: scale(1.05); }
.article-cover .badge {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  background: rgba(0,229,255,.15);
  border: 1px solid rgba(0,229,255,.3);
  color: var(--primary);
  backdrop-filter: blur(8px);
}
.article-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.article-meta i { font-size: 11px; }
.article-body h3 {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 12px;
  transition: var(--transition);
}
.article-card:hover .article-body h3 { color: var(--primary); }
.article-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
}
.article-link {
  margin-top: 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.article-link i { font-size: 12px; transition: transform .3s ease; }
.article-link:hover i { transform: translateX(4px); }

/* ===== FAQ ===== */
.faq-section { background: var(--bg-body); }
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--border-strong); }
.faq-item.active {
  border-color: rgba(0,229,255,.3);
  box-shadow: 0 0 20px rgba(0,229,255,.08);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  gap: 16px;
}
.faq-question i {
  font-size: 14px;
  color: var(--text-muted);
  transition: transform .3s ease;
  flex-shrink: 0;
}
.faq-item.active .faq-question i {
  transform: rotate(45deg);
  color: var(--primary);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s ease;
}
.faq-answer-inner {
  padding: 0 24px 22px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ===== CTA ===== */
.cta-section {
  padding: 80px 0;
  position: relative;
  background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  background-attachment: fixed;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(7,11,20,.92), rgba(10,14,23,.85));
}
.cta-box {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 740px;
  margin: 0 auto;
}
.cta-box .section-tag { justify-content: center; }
.cta-title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  margin-bottom: 18px;
  line-height: 1.25;
}
.cta-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 32px;
}
.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.cta-contact {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 22px;
  font-size: 15px;
  color: var(--text-secondary);
}
.cta-contact a {
  color: var(--primary);
  font-weight: 700;
  font-size: 18px;
}
.cta-contact a:hover { text-shadow: 0 0 12px rgba(0,229,255,.5); }

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  padding: 70px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 40px;
  padding-bottom: 50px;
}
.footer-brand .logo { margin-bottom: 20px; }
.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 22px;
  max-width: 360px;
}
.footer-social {
  display: flex;
  gap: 10px;
}
.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--text-secondary);
  transition: var(--transition);
}
.footer-social a:hover {
  color: var(--primary);
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: 0 4px 16px rgba(0,229,255,.2);
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 18px;
  letter-spacing: .5px;
}
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul li a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: var(--transition);
}
.footer-col ul li a:hover {
  color: var(--primary);
  padding-left: 6px;
}
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
}
.footer-contact li i {
  color: var(--primary);
  font-size: 13px;
  width: 18px;
  text-align: center;
}
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--text-muted);
}
.footer-bottom a { color: var(--text-secondary); }
.footer-bottom a:hover { color: var(--primary); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .challenge-grid { grid-template-columns: repeat(2, 1fr); }
  .industry-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .article-grid { grid-template-columns: repeat(2, 1fr); }
  .process-wrap { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .process-line { display: none; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .search-box input { width: 140px; }
  .search-box input:focus { width: 170px; }
  .header-inner { gap: 16px; }
}

@media (max-width: 768px) {
  .header-inner { gap: 12px; }
  .main-nav {
    position: fixed;
    top: 74px;
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    transform: translateY(-120%);
    transition: transform .35s ease;
    z-index: 99;
    backdrop-filter: blur(24px);
  }
  .main-nav.open { transform: translateY(0); }
  .main-nav ul {
    flex-direction: column;
    align-items: stretch;
  }
  .main-nav ul li a {
    padding: 14px 16px;
    border-radius: var(--radius-md);
  }
  .nav-toggle { display: flex; }
  .header-actions .search-box { display: none; }
  .header-actions .btn-sm { display: none; }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .footer-brand { grid-column: span 2; }
}

@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .header-inner { height: 64px; }
  .main-nav { top: 64px; }
  .hero-banner { padding: 60px 0 50px; }
  .hero-title { font-size: 30px; }
  .hero-desc { font-size: 15px; }
  .hero-actions .btn { width: 100%; }
  .hero-stats { grid-template-columns: 1fr 1fr; gap: 12px; }
  .hero-stat .number { font-size: 24px; }
  .challenge-grid { grid-template-columns: 1fr; }
  .industry-grid { grid-template-columns: 1fr; }
  .tech-grid { grid-template-columns: 1fr; }
  .article-grid { grid-template-columns: 1fr; }
  .process-wrap { grid-template-columns: 1fr; }
  .cta-actions .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: span 1; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .section { --spacing-section: 56px; }
}

@media (max-width: 400px) {
  .hero-stats { grid-template-columns: 1fr; }
}

/* roulang page: article */
:root {
    --bg: #0B0F1A;
    --bg-soft: #101624;
    --surface: #151D2E;
    --surface-2: #1A2338;
    --border: rgba(255,255,255,0.06);
    --border-strong: rgba(255,255,255,0.14);
    --text: #E8EDF7;
    --text-strong: #FFFFFF;
    --text-weak: #8B94A7;
    --primary: #00E5FF;
    --primary-2: #00B3D6;
    --accent: #7C3AED;
    --accent-2: #A78BFA;
    --success: #34D399;
    --warning: #FBBF24;
    --radius: 16px;
    --radius-sm: 10px;
    --radius-lg: 24px;
    --shadow: 0 20px 60px rgba(0,0,0,0.45);
    --shadow-sm: 0 8px 24px rgba(0,0,0,0.25);
    --transition: all 0.25s ease;
    --container: 1200px;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-2); }
button { font-family: inherit; border: none; background: none; cursor: pointer; }
input, textarea { font-family: inherit; }
ul, ol { list-style: none; }

.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

/* ====== Header / Nav ====== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(9, 13, 24, 0.78);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
    min-height: 70px;
}
.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.logo-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 13px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    font-weight: 800;
    font-size: 16px;
    letter-spacing: 0.06em;
    box-shadow: 0 4px 20px rgba(0, 229, 255, 0.35);
}
.logo-text {
    font-size: 20px;
    font-weight: 800;
    color: var(--text-strong);
    letter-spacing: 0.02em;
    line-height: 1.2;
}
.logo-text span { color: var(--primary); }

.main-nav ul {
    display: flex;
    align-items: center;
    gap: 6px;
}
.main-nav a {
    display: inline-block;
    padding: 10px 18px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-weak);
    transition: var(--transition);
    position: relative;
}
.main-nav a:hover {
    color: var(--text-strong);
    background: rgba(255,255,255,0.04);
}
.main-nav a.active {
    color: var(--primary);
    background: rgba(0, 229, 255, 0.1);
}
.main-nav a.active::after {
    content: '';
    position: absolute;
    left: 18px;
    right: 18px;
    bottom: 4px;
    height: 2px;
    border-radius: 2px;
    background: var(--primary);
    box-shadow: 0 0 12px var(--primary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}
.search-box {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 0 14px;
    height: 40px;
    min-width: 180px;
    transition: var(--transition);
}
.search-box:focus-within {
    border-color: rgba(0, 229, 255, 0.5);
    box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.12);
}
.search-box i { color: var(--text-weak); font-size: 14px; }
.search-box input {
    background: none;
    border: none;
    outline: none;
    color: var(--text);
    font-size: 14px;
    width: 100%;
}
.search-box input::placeholder { color: var(--text-weak); opacity: 0.8; }

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    border: none;
    border-radius: 999px;
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 6px 24px rgba(0, 229, 255, 0.25);
    white-space: nowrap;
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 229, 255, 0.35);
    color: #fff;
}
.btn-primary:active { transform: translateY(0); }
.btn-primary:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 3px;
}
.btn-sm { padding: 9px 18px; font-size: 13px; }
.btn-lg { padding: 15px 34px; font-size: 16px; }
.btn-block {
    display: flex;
    width: 100%;
    justify-content: center;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border);
    padding: 0 10px;
}
.nav-toggle span {
    display: block;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: var(--transition);
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ====== Article Banner ====== */
.article-banner {
    position: relative;
    padding: 88px 0 60px;
    background-image: linear-gradient(135deg, rgba(11,15,26,0.82), rgba(15,20,38,0.66)), url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    border-bottom: 1px solid var(--border);
    overflow: hidden;
}
.article-banner::before {
    content: '';
    position: absolute;
    top: -160px;
    right: -100px;
    width: 380px;
    height: 380px;
    background: radial-gradient(circle, rgba(0,229,255,0.14), transparent 60%);
    pointer-events: none;
}
.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 14px;
    margin-bottom: 32px;
    color: var(--text-weak);
    position: relative;
    z-index: 2;
}
.breadcrumb a { color: var(--text-weak); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { opacity: 0.4; }
.breadcrumb .current {
    color: var(--text);
    max-width: 280px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.article-heading {
    max-width: 860px;
    position: relative;
    z-index: 2;
}
.cat-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(0,229,255,0.12);
    border: 1px solid rgba(0,229,255,0.35);
    color: var(--primary);
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 18px;
}
.article-heading h1 {
    font-size: clamp(30px, 4.2vw, 48px);
    line-height: 1.22;
    color: var(--text-strong);
    margin-bottom: 20px;
    font-weight: 800;
    letter-spacing: -0.01em;
}
.article-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 14px;
    color: var(--text-weak);
}
.article-meta span {
    display: inline-flex;
    align-items: center;
    gap: 7px;
}
.article-meta i { color: var(--primary); font-size: 13px; }

/* ====== Article Layout ====== */
.article-section {
    padding: 64px 0 0;
}
.article-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 48px;
    align-items: start;
}
.article-main {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 48px;
    min-width: 0;
}

/* ====== Article Body ====== */
.article-body p {
    margin-bottom: 1.6rem;
    font-size: 1.05rem;
    line-height: 1.9;
    color: var(--text);
}
.article-body h2 {
    font-size: 1.8rem;
    margin: 2.5rem 0 1.25rem;
    color: var(--text-strong);
    font-weight: 800;
    position: relative;
    padding-left: 18px;
}
.article-body h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.35em;
    width: 5px;
    height: 1.05em;
    background: var(--primary);
    border-radius: 4px;
    box-shadow: 0 0 16px var(--primary);
}
.article-body h3 {
    font-size: 1.4rem;
    margin: 2rem 0 1rem;
    color: var(--text-strong);
    font-weight: 700;
}
.article-body ul,
.article-body ol {
    margin: 1.4rem 0;
    padding-left: 1.5rem;
}
.article-body ul li {
    list-style: disc;
    margin-bottom: 0.5rem;
    color: var(--text);
}
.article-body ol li {
    list-style: decimal;
    margin-bottom: 0.5rem;
    color: var(--text);
}
.article-body blockquote {
    border-left: 4px solid var(--accent);
    background: rgba(124,58,237,0.08);
    padding: 1rem 1.2rem;
    border-radius: 0 12px 12px 0;
    margin: 1.6rem 0;
    color: var(--text-weak);
}
.article-body img {
    border-radius: 14px;
    margin: 1.6rem 0;
    box-shadow: var(--shadow);
}
.article-body a {
    color: var(--primary);
    border-bottom: 1px solid rgba(0,229,255,0.3);
}
.article-body a:hover { color: var(--primary-2); border-bottom-color: var(--primary-2); }
.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
}
.article-body table th,
.article-body table td {
    border: 1px solid var(--border-strong);
    padding: 10px 14px;
    text-align: left;
    font-size: 14px;
}
.article-body table th {
    background: var(--surface-2);
    color: var(--text-strong);
}
.article-body table tr:nth-child(even) td { background: rgba(255,255,255,0.02); }

/* ====== Not Found ====== */
.not-found {
    text-align: center;
    padding: 60px 0;
}
.not-found-icon {
    width: 80px;
    height: 80px;
    border-radius: 24px;
    background: rgba(124,58,237,0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: var(--accent-2);
    margin: 0 auto 24px;
}
.not-found h2 {
    color: var(--text-strong);
    font-size: 28px;
    margin-bottom: 12px;
}
.not-found p {
    color: var(--text-weak);
    max-width: 420px;
    margin: 0 auto 28px;
}

/* ====== Article Tags ====== */
.article-tags {
    border-top: 1px solid var(--border);
    margin-top: 40px;
    padding-top: 24px;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}
.tags-label {
    color: var(--text-weak);
    font-size: 14px;
}
.tag-chip {
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border-strong);
    border-radius: 999px;
    color: var(--text);
    padding: 5px 14px;
    font-size: 13px;
    transition: var(--transition);
}
.tag-chip:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* ====== Sidebar ====== */
.widget {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 24px;
}
.widget h3 {
    color: var(--text-strong);
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.widget h3 i {
    color: var(--primary);
    font-size: 16px;
}
.info-list {
    display: flex;
    flex-direction: column;
}
.info-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
    gap: 16px;
}
.info-list li:last-child { border-bottom: none; }
.info-list li span { color: var(--text-weak); white-space: nowrap; }
.info-list li strong {
    color: var(--text);
    font-weight: 500;
    text-align: right;
    word-break: break-all;
}
.latest-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.latest-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 10px;
    border-radius: 12px;
    transition: var(--transition);
}
.latest-item:hover {
    background: rgba(255,255,255,0.03);
    transform: translateX(4px);
}
.latest-num {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,229,255,0.08);
    border: 1px solid rgba(0,229,255,0.2);
    color: var(--primary);
    font-weight: 700;
    font-size: 13px;
}
.latest-text { min-width: 0; }
.latest-text h4 {
    color: var(--text);
    font-size: 14px;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 4px;
    transition: var(--transition);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.latest-item:hover .latest-text h4 { color: var(--primary); }
.latest-text span { color: var(--text-weak); font-size: 12px; }
.widget-contact {
    text-align: center;
    background: linear-gradient(160deg, rgba(0,229,255,0.08), rgba(124,58,237,0.1)), var(--surface);
    border: 1px solid rgba(0,229,255,0.3);
}
.widget-contact h3 { justify-content: center; }
.contact-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    font-size: 22px;
    box-shadow: 0 8px 28px rgba(0,229,255,0.3);
}
.widget-contact p {
    color: var(--text-weak);
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 20px;
}
.contact-hotline {
    display: block;
    margin-top: 16px;
    color: var(--primary);
    font-size: 15px;
    font-weight: 600;
}
.empty-tip {
    color: var(--text-weak);
    font-size: 14px;
    padding: 10px 0;
    text-align: center;
}

/* ====== Related Section ====== */
.related-section {
    padding: 72px 0 0;
}
.section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    margin-bottom: 32px;
    gap: 24px;
}
.section-head h2 {
    color: var(--text-strong);
    font-size: 28px;
    font-weight: 800;
}
.section-head p {
    color: var(--text-weak);
    font-size: 15px;
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
}
.article-card {
    display: block;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}
.article-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-strong);
    box-shadow: var(--shadow);
}
.card-img {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
}
.card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.article-card:hover .card-img img { transform: scale(1.06); }
.card-img::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(11,15,26,0.6), transparent 55%);
}
.card-cat {
    position: absolute;
    left: 14px;
    bottom: 12px;
    z-index: 2;
    background: rgba(0,229,255,0.12);
    border: 1px solid rgba(0,229,255,0.3);
    color: var(--primary);
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 12px;
    backdrop-filter: blur(8px);
}
.card-body { padding: 20px; }
.card-body h3 {
    color: var(--text-strong);
    font-size: 16px;
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: var(--transition);
}
.article-card:hover .card-body h3 { color: var(--primary); }
.card-body p {
    color: var(--text-weak);
    font-size: 14px;
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 14px;
}
.card-meta {
    color: var(--text-weak);
    font-size: 13px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* ====== CTA ====== */
.cta-section {
    padding: 80px 0 0;
    margin-top: 72px;
}
.cta-inner {
    position: relative;
    background: linear-gradient(135deg, rgba(0,229,255,0.08), rgba(124,58,237,0.14)), url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-strong);
    padding: 64px 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 48px;
    overflow: hidden;
}
.cta-inner::after {
    content: '';
    position: absolute;
    top: -120px;
    right: 60px;
    width: 320px;
    height: 320px;
    background: radial-gradient(circle, rgba(0,229,255,0.15), transparent 60%);
    pointer-events: none;
}
.cta-content {
    position: relative;
    z-index: 2;
    max-width: 560px;
}
.cta-content h2 {
    color: var(--text-strong);
    font-size: 28px;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 16px;
}
.cta-content p {
    color: var(--text-weak);
    font-size: 15px;
    line-height: 1.8;
    margin-bottom: 28px;
}
.cta-info {
    position: relative;
    z-index: 2;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.cta-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text);
    font-size: 15px;
}
.cta-item i {
    width: 44px;
    height: 44px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,229,255,0.1);
    border: 1px solid rgba(0,229,255,0.3);
    color: var(--primary);
    font-size: 16px;
    flex-shrink: 0;
}

/* ====== Footer ====== */
.site-footer {
    background: rgba(9,13,24,0.96);
    border-top: 1px solid var(--border);
    margin-top: 80px;
    padding: 56px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.2fr;
    gap: 40px;
    padding-bottom: 40px;
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p {
    color: var(--text-weak);
    font-size: 14px;
    line-height: 1.8;
    max-width: 360px;
    margin-top: 16px;
}
.footer-social {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}
.footer-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border);
    color: var(--text-weak);
    font-size: 14px;
    transition: var(--transition);
}
.footer-social a:hover {
    background: rgba(0,229,255,0.1);
    border-color: rgba(0,229,255,0.4);
    color: var(--primary);
}
.footer-col h4 {
    color: var(--text-strong);
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 18px;
}
.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.footer-col ul li { font-size: 14px; }
.footer-col ul a { color: var(--text-weak); }
.footer-col ul a:hover { color: var(--primary); }
.footer-contact li {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-weak);
    font-size: 14px;
}
.footer-contact i { color: var(--primary); font-size: 13px; }
.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    border-top: 1px solid var(--border);
    padding: 20px 0;
    color: var(--text-weak);
    font-size: 13px;
}
.footer-bottom a { color: var(--text-weak); }
.footer-bottom a:hover { color: var(--primary); }

/* ====== Responsive ====== */
@media (max-width: 1024px) {
    .nav-toggle { display: flex; }
    .main-nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-soft);
        border-bottom: 1px solid var(--border);
        padding: 16px 20px 24px;
        display: none;
        box-shadow: var(--shadow-sm);
    }
    .main-nav.open { display: block; }
    .main-nav ul {
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
    }
    .main-nav a {
        display: block;
        padding: 13px 16px;
        border-radius: 12px;
        font-size: 15px;
    }
    .main-nav a.active::after {
        left: 0;
        right: auto;
        top: 50%;
        transform: translateY(-50%);
        bottom: auto;
        width: 3px;
        height: 20px;
    }
    .article-grid {
        grid-template-columns: minmax(0, 1fr);
    }
    .article-sidebar {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
    }
    .widget { margin-bottom: 0; }
    .related-grid { grid-template-columns: repeat(2, 1fr); }
    .cta-inner {
        flex-direction: column;
        align-items: flex-start;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}
@media (max-width: 768px) {
    .search-box { display: none; }
    .article-banner { padding: 64px 0 40px; }
    .article-main { padding: 32px 24px; }
    .article-meta { gap: 12px; font-size: 13px; }
    .article-heading h1 { font-size: 30px; }
    .section-head { flex-direction: column; align-items: flex-start; gap: 8px; }
    .related-section { padding-top: 48px; }
    .cta-section { padding-top: 48px; }
    .cta-inner { padding: 40px 24px; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    .footer-bottom { flex-direction: column; align-items: flex-start; }
    .breadcrumb { font-size: 13px; margin-bottom: 24px; }
    .article-section { padding-top: 48px; }
    .article-sidebar { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
    .related-grid { grid-template-columns: 1fr; }
    .article-main { padding: 24px 16px; border-radius: 14px; }
    .article-banner { padding: 48px 0 32px; }
    .header-inner { gap: 12px; }
    .logo-text { font-size: 17px; }
    .logo-icon { width: 38px; height: 38px; font-size: 14px; }
    .article-heading h1 { font-size: 26px; }
    .article-meta { flex-direction: column; align-items: flex-start; gap: 8px; }
    .section-head h2 { font-size: 22px; }
    .cta-content h2 { font-size: 22px; }
    .cta-info { flex-direction: column; }
    .cta-item { font-size: 14px; }
    .footer-bottom { font-size: 12px; }
    .footer-col ul { gap: 10px; }
    .article-body p { font-size: 1rem; }
    .article-body h2 { font-size: 1.5rem; }
    .article-body blockquote { padding: 0.8rem 1rem; }
    .breadcrumb .current { max-width: 180px; }
}