/* roulang page: index */
/* ========== 设计变量 ========== */
:root {
  --bg-primary: #0A0F1E;
  --bg-elevated: #101827;
  --bg-deep: #070B16;
  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.14);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --primary: #1B5CFF;
  --primary-dark: #1240CC;
  --accent: #02D7F2;
  --text-main: #EAEFFA;
  --text-secondary: #9AA8C3;
  --text-muted: #5D6B85;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.25);
  --shadow-hover: 0 12px 36px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(2, 215, 242, 0.25);
  --glow-primary: 0 0 24px rgba(2, 215, 242, 0.35);
  --glow-hover: 0 0 32px rgba(2, 215, 242, 0.55);
  --space-section: 110px;
  --space-section-md: 72px;
  --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
}

/* ========== Reset & Base ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-family);
  background: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: var(--accent); text-decoration: none; transition: color 0.25s ease; }
a:hover { color: #7FE9FF; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
::selection { background: rgba(2, 215, 242, 0.25); color: #fff; }

/* ========== 容器 ========== */
.grid-container { max-width: 1200px; }
.container-center { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.25s ease;
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(120deg, var(--primary) 0%, var(--accent) 130%);
  color: #fff;
  box-shadow: var(--glow-primary);
}
.btn-primary:hover {
  color: #fff;
  box-shadow: var(--glow-hover);
  transform: translateY(-2px);
}
.btn-primary:active { transform: translateY(0); box-shadow: var(--glow-primary); }
.btn-outline {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.35);
  color: var(--text-main);
}
.btn-outline:hover {
  border-color: var(--accent);
  background: rgba(2, 215, 242, 0.08);
  color: var(--accent);
}
.btn-lg { padding: 15px 34px; font-size: 16px; }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* ========== 区块标题 ========== */
.section-head {
  margin-bottom: 48px;
}
.section-tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--accent);
  background: rgba(2, 215, 242, 0.1);
  border: 1px solid rgba(2, 215, 242, 0.25);
  margin-bottom: 16px;
}
.section-title {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.01em;
  position: relative;
  padding-left: 16px;
  margin-bottom: 14px;
}
.section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  width: 4px;
  height: 26px;
  border-radius: 2px;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(2, 215, 242, 0.6);
}
.section-sub {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 640px;
}
.section-main { padding: var(--space-section) 0; }
@media (max-width: 767px) {
  .section-main { padding: var(--space-section-md) 0; }
  .section-title { font-size: 24px; padding-left: 12px; }
  .section-title::before { height: 22px; top: 4px; }
  .section-head { margin-bottom: 32px; }
}

/* ========== 顶部导航 ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  background: transparent;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(10, 15, 30, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--glass-border);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}
.logo-mark {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 16px;
  color: #fff;
  box-shadow: 0 0 18px rgba(27, 92, 255, 0.45);
}
.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: 0.01em;
  line-height: 1.2;
}
.logo-text em {
  font-style: normal;
  color: var(--accent);
}
.logo-sub {
  display: block;
  font-size: 11px;
  font-weight: 400;
  color: var(--text-muted);
  letter-spacing: 0.14em;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 34px;
}
.main-nav > a {
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  position: relative;
  padding: 8px 0;
  text-decoration: none;
  transition: color 0.25s ease;
}
.main-nav > a:hover { color: #fff; }
.main-nav > a.active { color: #fff; font-weight: 600; }
.main-nav > a.active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(2, 215, 242, 0.6);
}
.nav-carrier { display: flex; align-items: center; gap: 34px; }
.nav-cta { margin-left: 6px; }
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.05);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  font-size: 20px;
}
.nav-toggle:hover { border-color: var(--accent); color: var(--accent); }
@media (max-width: 1023px) {
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    background: rgba(10, 15, 30, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 28px;
    gap: 4px;
    border-bottom: 1px solid var(--glass-border);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  }
  .main-nav.open { transform: translateY(0); opacity: 1; visibility: visible; }
  .main-nav > a {
    display: block;
    padding: 13px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    font-size: 16px;
  }
  .main-nav > a.active::after { display: none; }
  .main-nav > a.active { color: var(--accent); }
  .nav-cta { margin-left: 0; margin-top: 14px; }
  .nav-cta .btn { width: 100%; }
}

/* ========== Hero 首屏 ========== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 150px 0 90px;
  overflow: hidden;
  background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(10, 15, 30, 0.94) 0%, rgba(10, 15, 30, 0.78) 45%, rgba(10, 15, 30, 0.4) 100%);
}
.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(180deg, transparent 0%, var(--bg-primary) 100%);
}
.hero-content { position: relative; z-index: 2; }
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  background: rgba(2, 215, 242, 0.1);
  border: 1px solid rgba(2, 215, 242, 0.3);
  margin-bottom: 26px;
}
.hero-title {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0.01em;
  margin-bottom: 22px;
  max-width: 640px;
}
.hero-title span {
  display: block;
  background: linear-gradient(120deg, #fff 10%, var(--accent) 90%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 520px;
  margin-bottom: 34px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 30px;
}
.hero-note {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 14px;
  color: var(--text-secondary);
  flex-wrap: wrap;
}
.hero-note i { color: var(--accent); margin-right: 4px; }
.hero-visual { position: relative; }
.hero-visual-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow-card);
  max-width: 420px;
  margin-left: auto;
}
.hero-visual-card img { border-radius: 12px; width: 100%; height: auto; }
.hero-visual-info {
  padding: 16px 6px 6px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.hero-visual-info span { font-size: 13px; color: var(--accent); font-weight: 600; }
.hero-visual-info strong { font-size: 16px; color: var(--text-main); }
.hero-stamp {
  position: absolute;
  top: 110px;
  right: 34px;
  writing-mode: vertical-rl;
  font-size: 14px;
  letter-spacing: 0.4em;
  color: rgba(234, 239, 250, 0.28);
  border: 1px solid rgba(234, 239, 250, 0.18);
  padding: 14px 8px;
  border-radius: 8px;
  z-index: 2;
  text-transform: uppercase;
}
.hero-scroll {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  color: var(--text-secondary);
  font-size: 18px;
  animation: bounceDown 2s infinite;
}
.hero-scroll:hover { color: var(--accent); }
@keyframes bounceDown {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 0.6; }
  50% { transform: translateX(-50%) translateY(8px); opacity: 1; }
}
@media (max-width: 1023px) {
  .hero { padding: 130px 0 70px; }
  .hero-visual-card { margin: 40px auto 0; }
  .hero-stamp { display: none; }
}
@media (max-width: 767px) {
  .hero { padding: 110px 0 60px; min-height: auto; }
  .hero-title { font-size: 32px; }
  .hero-sub { font-size: 16px; }
  .hero-actions .btn { width: 100%; }
  .hero-note { gap: 12px; font-size: 13px; }
}

/* ========== 信任指标条 ========== */
.trust-bar {
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
  padding: 28px 0;
}
.trust-item {
  text-align: center;
  padding: 12px 8px;
  border-right: 1px solid var(--border-subtle);
}
.trust-item:last-child { border-right: none; }
.trust-num {
  font-size: 30px;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}
.trust-num i {
  font-style: normal;
  color: var(--accent);
  font-size: 22px;
  margin-right: 2px;
}
.trust-label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 6px;
}
@media (max-width: 767px) {
  .trust-bar { overflow-x: auto; }
  .trust-bar .grid-x { flex-wrap: nowrap; min-width: 600px; }
  .trust-item { padding: 10px 16px; }
}

/* ========== 产品网格 ========== */
.product-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  transform: translateY(-4px);
  border-color: rgba(2, 215, 242, 0.45);
  box-shadow: var(--shadow-hover);
}
.product-card-media {
  position: relative;
  overflow: hidden;
  width: 100%;
  height: 180px;
}
.product-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.product-card:hover .product-card-media img { transform: scale(1.03); }
.product-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(2, 215, 242, 0.85);
  color: #07131C;
  box-shadow: 0 4px 14px rgba(2, 215, 242, 0.35);
}
.product-card-body {
  padding: 20px 22px 22px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.product-card-body h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: #fff;
}
.product-card-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
  margin-top: auto;
}
.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
}
.product-link {
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 4px;
}
.product-link:hover { gap: 10px; }
.product-card-featured {
  background: linear-gradient(150deg, var(--bg-elevated) 0%, #0E1B33 100%);
  border: 1px solid rgba(2, 215, 242, 0.2);
}
.product-card-featured:hover { border-color: rgba(2, 215, 242, 0.55); }
.featured-body {
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.featured-body h3 { font-size: 24px; margin-bottom: 12px; }
.featured-body p { font-size: 15px; max-width: 420px; }
.featured-media { height: 100%; min-height: 260px; }
.featured-media img { object-fit: cover; }
@media (max-width: 1023px) {
  .product-card-media { height: 200px; }
  .featured-media { min-height: 220px; }
}
@media (max-width: 767px) {
  .product-card-media { height: 190px; }
  .featured-body { padding: 22px; }
}

/* ========== 资讯列表 ========== */
.news-section { background: var(--bg-elevated); border-top: 1px solid var(--border-subtle); border-bottom: 1px solid var(--border-subtle); }
.news-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.news-card:hover {
  transform: translateY(-3px);
  border-color: rgba(2, 215, 242, 0.4);
  box-shadow: var(--shadow-hover);
}
.news-thumb {
  position: relative;
  display: block;
  width: 100%;
  height: 170px;
  overflow: hidden;
}
.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.news-card:hover .news-thumb img { transform: scale(1.04); }
.news-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(10, 15, 30, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border);
  color: var(--accent);
}
.news-body { padding: 18px 20px 20px; display: flex; flex-direction: column; flex: 1; }
.news-body h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 8px;
}
.news-body h3 a { color: var(--text-main); }
.news-body h3 a:hover { color: var(--accent); }
.news-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 14px;
}
.news-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: auto;
}
.news-meta a {
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.news-empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
  background: var(--bg-primary);
  border: 1px dashed var(--border-subtle);
  border-radius: var(--radius-md);
}
.news-empty i {
  font-size: 36px;
  color: var(--text-muted);
  opacity: 0.5;
  margin-bottom: 10px;
}
.news-empty p { font-size: 15px; }
.section-head-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 36px;
}
.section-head-row .section-head { margin-bottom: 0; }
.all-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  padding-bottom: 4px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  transition: all 0.25s ease;
}
.all-link:hover { color: var(--accent); border-bottom-color: var(--accent); gap: 12px; }

/* ========== 评价轮播 ========== */
.testimonials-section { background: var(--bg-primary); }
.orbit { max-width: 900px; margin: 0 auto; }
.testimonial-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-radius: var(--radius-lg);
  padding: 44px 48px;
  text-align: center;
  max-width: 760px;
  margin: 0 auto;
  box-shadow: var(--shadow-card);
}
.testimonial-stars {
  color: #FFC53D;
  font-size: 16px;
  letter-spacing: 4px;
  margin-bottom: 20px;
}
.testimonial-quote {
  font-size: 18px;
  line-height: 1.85;
  color: var(--text-main);
  margin-bottom: 24px;
}
.testimonial-quote::before {
  content: '“';
  display: block;
  font-size: 46px;
  color: var(--accent);
  opacity: 0.6;
  line-height: 0.6;
  margin-bottom: 10px;
}
.testimonial-author {
  font-size: 15px;
  color: var(--text-secondary);
  font-weight: 500;
}
.testimonial-author strong { color: #fff; font-weight: 600; }
.orbit-controls button {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--glass-border);
  color: var(--text-main);
  font-size: 16px;
  cursor: pointer;
  transition: all 0.25s ease;
}
.orbit-controls button:hover {
  background: rgba(2, 215, 242, 0.15);
  border-color: var(--accent);
  color: var(--accent);
}
.orbit-bullets button {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.2);
  border: none;
  padding: 0;
  transition: all 0.25s ease;
}
.orbit-bullets button.is-active {
  width: 26px;
  background: var(--accent);
  box-shadow: 0 0 10px rgba(2, 215, 242, 0.5);
}
@media (max-width: 767px) {
  .testimonial-card { padding: 30px 22px; }
  .testimonial-quote { font-size: 16px; }
}

/* ========== 服务保障条 ========== */
.guarantee-section {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}
.guarantee-item {
  text-align: center;
  padding: 28px 18px;
  border-radius: var(--radius-md);
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  transition: all 0.3s ease;
  height: 100%;
}
.guarantee-item:hover {
  border-color: rgba(2, 215, 242, 0.4);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}
.guarantee-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--accent);
  background: rgba(2, 215, 242, 0.1);
  border: 1px solid rgba(2, 215, 242, 0.2);
}
.guarantee-item h3 { font-size: 16px; font-weight: 600; color: #fff; margin-bottom: 6px; }
.guarantee-item p { font-size: 13px; color: var(--text-muted); }

/* ========== FAQ ========== */
.faq-accordion { max-width: 860px; margin: 0 auto; }
.faq-accordion .accordion-item {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.faq-accordion .accordion-item.is-active {
  border-color: rgba(2, 215, 242, 0.4);
  box-shadow: 0 0 0 1px rgba(2, 215, 242, 0.15), var(--shadow-card);
}
.faq-accordion .accordion-title {
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 16px;
  font-weight: 500;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  position: relative;
}
.faq-accordion .accordion-title::before,
.faq-accordion .accordion-title::after {
  content: '';
  width: 14px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  transition: all 0.3s ease;
  flex-shrink: 0;
}
.faq-accordion .accordion-title::after { transform: translateY(-50%) rotate(90deg); }
.faq-accordion .accordion-item:not(.is-active) .accordion-title::after { transform: translateY(-50%) rotate(0deg); }
.faq-accordion .accordion-title:hover,
.faq-accordion .accordion-title:focus {
  background: rgba(2, 215, 242, 0.04);
  color: var(--accent);
}
.faq-accordion .accordion-title {
  padding-right: 54px;
}
.faq-accordion .accordion-content {
  background: transparent;
  border: none;
  padding: 0 24px 22px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.75;
}
.faq-accordion .accordion-content p { margin-bottom: 0; }

/* ========== CTA / 咨询 ========== */
.cta-section { position: relative; padding: var(--space-section) 0; }
.cta-card {
  position: relative;
  border-radius: 20px;
  padding: 56px 60px;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(18, 25, 50, 0.92) 0%, rgba(10, 15, 30, 0.94) 100%);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
}
.cta-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}
.cta-card::after {
  content: '官方网站';
  position: absolute;
  top: 26px;
  right: 30px;
  writing-mode: vertical-rl;
  font-size: 13px;
  letter-spacing: 0.35em;
  color: rgba(234, 239, 250, 0.16);
  border: 1px solid rgba(234, 239, 250, 0.12);
  padding: 10px 6px;
  border-radius: 6px;
}
.cta-title {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 12px;
}
.cta-sub {
  font-size: 15px;
  color: var(--text-secondary);
  max-width: 460px;
  margin-bottom: 28px;
}
.cta-form { max-width: 440px; }
.cta-form .form-group { margin-bottom: 16px; }
.cta-form label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-main);
  margin-bottom: 6px;
}
.cta-form input,
.cta-form select {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: var(--text-main);
  font-size: 15px;
  outline: none;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.cta-form input:focus,
.cta-form select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(2, 215, 242, 0.15);
}
.cta-form select { appearance: none; -webkit-appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%239AA8C3'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; }
.cta-form select option { background: #101827; color: var(--text-main); }
.cta-form input::placeholder { color: var(--text-muted); }
.cta-note {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 10px;
}
@media (max-width: 767px) {
  .cta-card { padding: 36px 24px; }
  .cta-title { font-size: 24px; }
  .cta-card::after { display: none; }
}

/* ========== 页脚 ========== */
.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border-subtle);
  padding: 60px 0 0;
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 14px 0 18px;
  max-width: 300px;
}
.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
}
.footer-links li { margin-bottom: 10px; }
.footer-links a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.25s ease, padding-left 0.25s ease;
  display: inline-block;
}
.footer-links a:hover { color: var(--accent); padding-left: 4px; }
.footer-contact li {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 12px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.footer-contact i { color: var(--accent); margin-top: 4px; width: 16px; text-align: center; }
.footer-bottom {
  margin-top: 48px;
  padding: 20px 0;
  border-top: 1px solid var(--border-subtle);
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
}
.footer-bottom a { color: var(--text-muted); }
.footer-bottom a:hover { color: var(--accent); }
@media (max-width: 767px) {
  .site-footer { padding: 44px 0 0; }
  .footer-bottom { margin-top: 32px; }
}

/* ========== 补丁 ========== */
.grid-margin-x > .cell { margin-bottom: 24px; }
.grid-margin-x:last-child > .cell { margin-bottom: 0; }
.focus-visible { outline: none; }
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* roulang page: category1 */
/* ======== 设计变量 ======== */
        :root {
            --bg-body: #0A0F1E;
            --bg-elevated: #111A2C;
            --bg-card: #0F1728;
            --bg-deep: #060B16;
            --glass-bg: rgba(255, 255, 255, 0.055);
            --glass-border: rgba(255, 255, 255, 0.12);
            --card-border: rgba(255, 255, 255, 0.075);
            --primary: #1B5CFF;
            --primary-hover: #3A74FF;
            --accent: #02D7F2;
            --accent-hover: #35E4FF;
            --text-main: #EAEFFA;
            --text-secondary: #9AA8C3;
            --text-weak: #5D6B85;
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-tag: 999px;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.28);
            --shadow-card-hover: 0 14px 40px rgba(0, 0, 0, 0.38), 0 0 0 1px rgba(2, 215, 242, 0.1);
            --shadow-glow: 0 0 24px rgba(2, 215, 242, 0.35);
            --shadow-glow-hover: 0 0 34px rgba(2, 215, 242, 0.55);
            --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

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

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

        ul,
        ol {
            list-style: none;
        }

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

        :focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }

        .grid-container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section {
            padding: 100px 0;
            position: relative;
        }

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

        .section-head {
            text-align: center;
            max-width: 760px;
            margin: 0 auto 56px;
        }

        .section-eyebrow {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--accent);
            background: rgba(2, 215, 242, 0.1);
            border: 1px solid rgba(2, 215, 242, 0.2);
            border-radius: var(--radius-tag);
            padding: 4px 16px;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: 0.01em;
            color: var(--text-main);
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }

        .section-title::before {
            content: "";
            display: block;
            width: 4px;
            height: 24px;
            background: linear-gradient(180deg, var(--accent), transparent);
            border-radius: 999px;
            position: absolute;
            left: -14px;
            top: 50%;
            transform: translateY(-50%);
        }

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

        /* ======== 按钮 ======== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            border: 1px solid transparent;
            transition: var(--transition);
            line-height: 1.4;
            white-space: nowrap;
        }

        .btn-primary {
            background: linear-gradient(120deg, var(--primary), var(--accent));
            color: #fff;
            box-shadow: var(--shadow-glow);
        }

        .btn-primary:hover {
            background: linear-gradient(120deg, var(--primary-hover), var(--accent-hover));
            color: #fff;
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-2px);
        }

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

        .btn-outline {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.25);
            color: var(--text-main);
        }

        .btn-outline:hover {
            border-color: var(--accent);
            background: rgba(2, 215, 242, 0.08);
            color: var(--accent);
            transform: translateY(-2px);
        }

        .btn-lg {
            padding: 15px 34px;
            font-size: 16px;
        }

        .btn-sm {
            padding: 8px 20px;
            font-size: 14px;
        }

        /* ======== 导航 ======== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 78px;
            background: transparent;
            transition: var(--transition);
            border-bottom: 1px solid transparent;
        }

        .site-header.scrolled {
            background: rgba(8, 12, 24, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom-color: rgba(255, 255, 255, 0.06);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
        }

        .header-inner {
            height: 78px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 10px;
            font-size: 17px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            box-shadow: 0 4px 16px rgba(27, 92, 255, 0.35);
        }

        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.1;
            letter-spacing: 0.01em;
            display: flex;
            align-items: baseline;
            gap: 2px;
        }

        .logo-text em {
            font-style: normal;
            color: var(--accent);
            font-size: 22px;
        }

        .logo-sub {
            display: block;
            font-size: 11px;
            font-weight: 400;
            color: var(--text-secondary);
            letter-spacing: 0.04em;
            margin-top: 2px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .main-nav>a {
            position: relative;
            padding: 28px 12px 22px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            line-height: 1.2;
        }

        .main-nav>a::after {
            content: "";
            position: absolute;
            bottom: 14px;
            left: 12px;
            right: 12px;
            height: 2px;
            border-radius: 999px;
            background: linear-gradient(90deg, var(--accent), transparent);
            opacity: 0;
            transform: scaleX(0.4);
            transition: var(--transition);
        }

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

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

        .main-nav>a.active {
            color: #fff;
        }

        .main-nav>a.active::after {
            opacity: 1;
            transform: scaleX(1);
        }

        .nav-cta {
            margin-left: 12px;
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 10px;
            color: var(--text-main);
            font-size: 18px;
            cursor: pointer;
            background: rgba(255, 255, 255, 0.04);
            transition: var(--transition);
        }

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

        /* ======== 页头Banner ======== */
        .page-banner {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            background: url('/assets/images/backpic/back-1.webp') center center/cover no-repeat;
            padding: 140px 0 80px;
            overflow: hidden;
        }

        .page-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg,
                    rgba(6, 11, 22, 0.92) 0%,
                    rgba(10, 15, 30, 0.78) 50%,
                    rgba(10, 15, 30, 0.55) 100%);
        }

        .page-banner::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to bottom, transparent, var(--bg-body));
        }

        .page-banner .grid-container {
            position: relative;
            z-index: 2;
            width: 100%;
        }

        .banner-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }

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

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

        .banner-breadcrumb i {
            font-size: 12px;
            color: var(--text-weak);
        }

        .banner-title {
            font-size: 52px;
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: 0.02em;
            color: #fff;
            margin-bottom: 16px;
            text-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
        }

        .banner-title span {
            color: var(--accent);
        }

        .banner-desc {
            max-width: 680px;
            font-size: 17px;
            line-height: 1.8;
            color: rgba(234, 239, 250, 0.85);
        }

        .banner-shield {
            display: inline-block;
            margin-top: 28px;
            padding: 6px 18px;
            background: rgba(2, 215, 242, 0.1);
            border: 1px solid rgba(2, 215, 242, 0.25);
            border-radius: var(--radius-tag);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.02em;
        }

        /* ======== 产品系列宽幅卡片 ======== */
        .product-list {
            display: flex;
            flex-direction: column;
            gap: 40px;
        }

        .product-card {
            display: flex;
            background: var(--bg-card);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }

        .product-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(2, 215, 242, 0.25);
            transform: translateY(-4px);
        }

        .product-card-media {
            flex: 0 0 44%;
            position: relative;
            overflow: hidden;
            min-height: 280px;
        }

        .product-card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
            position: absolute;
            inset: 0;
        }

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

        .product-card-body {
            flex: 1;
            padding: 40px 36px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .product-category-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(2, 215, 242, 0.08);
            border: 1px solid rgba(2, 215, 242, 0.15);
            border-radius: var(--radius-tag);
            padding: 3px 12px;
            margin-bottom: 14px;
            width: fit-content;
        }

        .product-card-body h3 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.35;
            margin-bottom: 12px;
        }

        .product-card-desc {
            font-size: 15px;
            line-height: 1.75;
            color: var(--text-secondary);
            margin-bottom: 18px;
        }

        .product-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 24px;
        }

        .product-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: var(--radius-tag);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 13px;
            color: var(--text-secondary);
            transition: var(--transition);
        }

        .product-tag:hover {
            border-color: rgba(2, 215, 242, 0.4);
            color: var(--accent);
        }

        .product-links {
            display: flex;
            gap: 24px;
            align-items: center;
        }

        .link-arrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 15px;
            font-weight: 600;
            color: var(--accent);
            transition: var(--transition);
        }

        .link-arrow i {
            transition: transform 0.3s ease;
        }

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

        .link-arrow:hover i {
            transform: translateX(3px);
        }

        .link-quiet {
            font-size: 14px;
            color: var(--text-secondary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.15);
            padding-bottom: 2px;
        }

        .link-quiet:hover {
            color: var(--accent);
            border-bottom-color: var(--accent);
        }

        /* ======== 技术亮点网格 ======== */
        .highlight-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .highlight-card {
            background: var(--bg-card);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            padding: 34px 30px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .highlight-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }

        .highlight-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(2, 215, 242, 0.2);
        }

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

        .highlight-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--accent);
            background: rgba(2, 215, 242, 0.1);
            border: 1px solid rgba(2, 215, 242, 0.18);
            margin-bottom: 20px;
        }

        .highlight-card h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 10px;
        }

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

        /* ======== 数据带 ======== */
        .stats-band {
            background: linear-gradient(120deg, rgba(27, 92, 255, 0.12), rgba(2, 215, 242, 0.06));
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            padding: 60px 0;
        }

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

        .stat-item {
            text-align: center;
            padding: 20px 10px;
        }

        .stat-number {
            font-size: 44px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            letter-spacing: 0.01em;
            background: linear-gradient(135deg, var(--accent), var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 8px;
            letter-spacing: 0.02em;
        }

        /* ======== 选购流程 ======== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            counter-reset: step;
        }

        .process-step {
            position: relative;
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-card);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            transition: var(--transition);
        }

        .process-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }

        .step-number {
            width: 48px;
            height: 48px;
            margin: 0 auto 20px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            box-shadow: 0 0 18px rgba(2, 215, 242, 0.25);
        }

        .step-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 10px;
        }

        .step-desc {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
        }

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

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

        .faq-item.active {
            border-color: rgba(2, 215, 242, 0.3);
            background: var(--bg-elevated);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            cursor: pointer;
            text-align: left;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-main);
            background: transparent;
            transition: var(--transition);
        }

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

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.15);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--text-secondary);
            flex-shrink: 0;
            transition: transform 0.35s ease, border-color 0.35s ease, color 0.35s ease;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            border-color: var(--accent);
            color: var(--accent);
        }

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

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

        .faq-answer p {
            padding: 0 24px 24px;
            font-size: 15px;
            line-height: 1.75;
            color: var(--text-secondary);
        }

        /* ======== CTA ======== */
        .cta-section {
            position: relative;
            padding: 100px 0;
        }

        .cta-card {
            background: linear-gradient(135deg, rgba(27, 92, 255, 0.18), rgba(2, 215, 242, 0.08));
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: 24px;
            padding: 64px 56px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            position: relative;
            overflow: hidden;
        }

        .cta-card::before {
            content: "";
            position: absolute;
            top: -40px;
            right: -40px;
            width: 160px;
            height: 160px;
            background: radial-gradient(circle, rgba(2, 215, 242, 0.2), transparent 70%);
            pointer-events: none;
        }

        .cta-content {
            max-width: 520px;
        }

        .cta-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.35;
            color: #fff;
            margin-bottom: 12px;
        }

        .cta-desc {
            font-size: 16px;
            color: rgba(234, 239, 250, 0.75);
            line-height: 1.7;
        }

        .cta-actions {
            display: flex;
            gap: 16px;
            flex-shrink: 0;
            flex-wrap: wrap;
        }

        /* ======== 页脚 ======== */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 64px 0 0;
        }

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

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-secondary);
            max-width: 300px;
            margin-top: 12px;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-title::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 2px;
            background: linear-gradient(90deg, var(--accent), transparent);
            border-radius: 999px;
        }

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

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

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

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

        .footer-contact i {
            width: 18px;
            color: var(--accent);
            font-size: 14px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            margin-top: 48px;
            padding: 22px 0;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 13px;
            color: var(--text-weak);
            letter-spacing: 0.02em;
        }

        /* ======== 响应式 ======== */
        @media (max-width: 1023px) {
            .nav-toggle {
                display: inline-flex;
            }

            .main-nav {
                position: fixed;
                top: 78px;
                left: 0;
                right: 0;
                background: rgba(8, 12, 24, 0.97);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
                flex-direction: column;
                align-items: flex-start;
                padding: 16px 24px 24px;
                gap: 4px;
                transform: translateY(-12px);
                opacity: 0;
                visibility: hidden;
                transition: all 0.4s ease;
                box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
            }

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

            .main-nav>a {
                width: 100%;
                padding: 14px 12px;
                font-size: 16px;
                border-radius: 8px;
            }

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

            .main-nav>a:hover,
            .main-nav>a.active {
                background: rgba(2, 215, 242, 0.08);
                color: var(--accent);
            }

            .nav-cta {
                width: 100%;
                margin-left: 0;
                margin-top: 12px;
            }

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

            .product-card {
                flex-direction: column;
            }

            .product-card-media {
                flex: none;
                min-height: 220px;
                position: relative;
            }

            .product-card-media img {
                position: absolute;
            }

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

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

            .cta-card {
                flex-direction: column;
                padding: 48px 32px;
                text-align: center;
            }

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

            .cta-actions {
                justify-content: center;
            }
        }

        @media (max-width: 767px) {
            .section {
                padding: 64px 0;
            }

            .section-title {
                font-size: 24px;
            }

            .page-banner {
                min-height: 340px;
                padding: 110px 0 60px;
            }

            .banner-title {
                font-size: 34px;
            }

            .banner-desc {
                font-size: 15px;
            }

            .product-card-body {
                padding: 28px 22px;
            }

            .product-card-body h3 {
                font-size: 22px;
            }

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

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }

            .stat-number {
                font-size: 34px;
            }

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

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

            .cta-title {
                font-size: 24px;
            }

            .btn-lg {
                padding: 14px 24px;
                font-size: 15px;
            }

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

            .logo-text {
                font-size: 17px;
            }

            .logo-sub {
                font-size: 10px;
            }

            .logo-mark {
                width: 36px;
                height: 36px;
                font-size: 15px;
            }
        }

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

            .header-inner {
                gap: 12px;
            }

            .nav-cta {
                display: block;
            }

            .nav-cta .btn {
                font-size: 13px;
                padding: 8px 14px;
            }

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

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

            .product-links {
                flex-direction: column;
                gap: 8px;
                align-items: flex-start;
            }
        }

/* roulang page: article */
:root {
  --bg: #0A0F1E;
  --bg-deep: #060A14;
  --bg-elev: #111827;
  --glass-bg: rgba(255,255,255,0.06);
  --glass-border: rgba(255,255,255,0.14);
  --border: rgba(255,255,255,0.08);
  --primary: #1B5CFF;
  --primary-2: #02D7F2;
  --accent: #00E0C6;
  --text: #EAEFFA;
  --text-2: #9AA8C3;
  --text-3: #5D6B85;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 8px 30px rgba(0,0,0,0.25);
  --glow: 0 0 24px rgba(2,215,242,0.35);
  --font: "PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(60% 50% at 20% 0%, rgba(27,92,255,0.10), transparent 70%),
    radial-gradient(40% 40% at 90% 10%, rgba(2,215,242,0.04), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.75;
  font-size: 16px;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--primary-2);
  outline-offset: 2px;
  border-radius: 4px;
}
.grid-container { max-width: 1200px; }
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background .3s ease, border-color .3s ease, box-shadow .3s ease;
}
.site-header.scrolled {
  background: rgba(10,15,30,0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: 0 8px 30px rgba(0,0,0,0.35);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
}
.logo { display: flex; align-items: center; gap: 12px; }
.logo-mark {
  width: 42px; height: 42px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  border-radius: 10px;
  font-weight: 800; color: #fff; font-size: 16px;
  box-shadow: var(--glow);
  flex-shrink: 0;
}
.logo-text {
  font-size: 20px; font-weight: 700; color: var(--text);
  line-height: 1.15; letter-spacing: 0.02em;
}
.logo-text em { color: var(--primary-2); font-style: normal; }
.logo-sub {
  display: block; font-size: 11px; color: var(--text-3);
  font-weight: 400; letter-spacing: 0.08em; margin-top: 2px;
}
.main-nav { display: flex; align-items: center; gap: 32px; }
.main-nav a {
  color: var(--text-2); font-size: 15px; font-weight: 500;
  padding: 8px 0; position: relative;
  transition: color .2s ease;
}
.main-nav a:hover { color: #fff; }
.main-nav a.active { color: #fff; }
.main-nav a.active::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
  background: var(--primary-2);
  border-radius: 2px;
  box-shadow: var(--glow);
}
.nav-cta { margin-left: 8px; }
.nav-toggle {
  display: none;
  background: none; border: 0; color: var(--text);
  font-size: 22px; cursor: pointer;
  padding: 8px;
}
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  border-radius: var(--radius-sm);
  padding: 12px 24px;
  font-size: 15px; font-weight: 600; line-height: 1;
  text-decoration: none;
  border: 0; cursor: pointer;
  transition: all .25s ease;
}
.btn-primary {
  background: linear-gradient(120deg, var(--primary), var(--primary-2));
  color: #fff;
  box-shadow: 0 0 24px rgba(2,215,242,0.22);
}
.btn-primary:hover {
  box-shadow: 0 0 34px rgba(2,215,242,0.5);
  transform: translateY(-2px);
  color: #fff;
}
.btn-primary:active { transform: translateY(0); }
.btn-ghost {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.3);
  color: var(--text);
}
.btn-ghost:hover {
  border-color: var(--primary-2);
  background: rgba(2,215,242,0.08);
  color: var(--primary-2);
}
.btn-sm { padding: 10px 18px; font-size: 14px; }
.btn-lg { padding: 16px 32px; font-size: 17px; }
.breadcrumb-wrap {
  padding-top: 116px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
  background: rgba(6,10,20,0.45);
}
.breadcrumb {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: 8px; font-size: 14px; color: var(--text-3);
}
.breadcrumb a { color: var(--text-2); transition: color .2s; }
.breadcrumb a:hover { color: var(--primary-2); }
.breadcrumb .sep { color: var(--text-3); }
.breadcrumb .current { color: var(--text); max-width: 380px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.article-hero { padding: 52px 0 10px; }
.article-head { max-width: 860px; margin: 0 auto; text-align: center; }
.article-cat {
  display: inline-block;
  padding: 6px 18px;
  border-radius: 999px;
  font-size: 13px; font-weight: 600;
  color: var(--primary-2);
  background: rgba(2,215,242,0.1);
  border: 1px solid rgba(2,215,242,0.25);
}
.article-head h1 {
  font-size: 42px; line-height: 1.28;
  margin: 20px 0 16px;
  font-weight: 700;
  letter-spacing: 0.01em;
}
.article-meta {
  display: flex; flex-wrap: wrap;
  gap: 10px 22px; justify-content: center;
  color: var(--text-3); font-size: 14px;
}
.article-meta i { color: var(--primary-2); margin-right: 5px; }
.article-cover-wrap { max-width: 960px; margin: 36px auto 0; padding: 0 24px; }
.article-cover {
  width: 100%; border-radius: 16px;
  box-shadow: var(--shadow);
  aspect-ratio: 16/9;
  object-fit: cover;
}
.article-body {
  max-width: 820px;
  margin: 48px auto 0;
  padding: 0 24px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text);
  min-height: 300px;
}
.article-body h2 {
  font-size: 28px; margin: 44px 0 18px;
  font-weight: 700;
  display: flex; align-items: center; gap: 10px;
}
.article-body h2::before {
  content: '';
  width: 4px; height: 22px;
  background: var(--primary-2);
  border-radius: 2px;
  box-shadow: var(--glow);
  flex-shrink: 0;
}
.article-body h3 { font-size: 22px; margin: 34px 0 14px; font-weight: 600; }
.article-body h4 { font-size: 18px; margin: 28px 0 10px; font-weight: 600; }
.article-body p { margin: 0 0 22px; }
.article-body a { color: var(--primary-2); border-bottom: 1px solid rgba(2,215,242,0.3); transition: border-color .2s; }
.article-body a:hover { border-bottom-color: var(--primary-2); }
.article-body blockquote {
  margin: 28px 0; padding: 18px 22px;
  border-left: 3px solid var(--primary-2);
  background: rgba(2,215,242,0.05);
  border-radius: 0 10px 10px 0;
  color: var(--text-2);
}
.article-body img { border-radius: 12px; margin: 24px 0; }
.article-body figcaption { color: var(--text-3); font-size: 13px; text-align: center; margin: -10px 0 24px; }
.article-body ul, .article-body ol { margin: 0 0 22px; padding-left: 24px; }
.article-body li { margin-bottom: 6px; }
.article-body table {
  width: 100%; border-collapse: collapse;
  margin: 28px 0;
  display: block; overflow-x: auto;
  font-size: 14px;
}
.article-body th, .article-body td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
}
.article-body th { background: rgba(255,255,255,0.05); font-weight: 600; }
.article-body pre {
  background: #0d1420;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  overflow-x: auto;
  font-size: 14px; line-height: 1.6;
}
.article-body code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: rgba(27,92,255,0.12);
  padding: 2px 6px; border-radius: 4px;
  font-size: 14px;
}
.article-body pre code { background: transparent; padding: 0; }
.post-nav {
  max-width: 820px;
  margin: 48px auto 0;
  padding: 24px 24px 0;
  display: flex; justify-content: space-between; gap: 16px;
  border-top: 1px solid var(--border);
}
.post-nav a, .post-nav span {
  font-size: 15px; color: var(--text-2);
  display: inline-flex; align-items: center; gap: 8px;
  transition: color .2s;
}
.post-nav a:hover { color: var(--primary-2); }
.not-found {
  text-align: center;
  padding: 70px 24px;
}
.not-found i {
  font-size: 58px; color: var(--text-3);
  margin-bottom: 18px;
}
.not-found h2 { font-size: 30px; margin-bottom: 12px; }
.not-found p { color: var(--text-2); margin-bottom: 28px; }
.related-section { padding: 96px 0 30px; }
.section-head {
  display: flex; align-items: flex-end; justify-content: space-between;
  margin-bottom: 40px; gap: 16px;
}
.section-head h2 {
  font-size: 32px; font-weight: 700; margin: 0;
  display: flex; align-items: center; gap: 12px;
}
.section-head h2::before {
  content: '';
  width: 4px; height: 22px;
  background: var(--primary-2);
  border-radius: 2px;
  box-shadow: var(--glow);
}
.section-link {
  color: var(--primary-2); font-size: 15px;
  display: inline-flex; align-items: center; gap: 6px;
  transition: gap .2s;
}
.section-link:hover { gap: 10px; }
.related-card {
  display: flex; flex-direction: column;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  height: 100%;
  transition: transform .3s, border-color .3s, box-shadow .3s;
}
.related-card:hover {
  transform: translateY(-4px);
  border-color: rgba(2,215,242,0.4);
  box-shadow: var(--shadow);
}
.related-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}
.related-content { padding: 20px 22px; flex: 1; }
.related-content h3 {
  font-size: 17px; line-height: 1.45;
  margin: 0 0 12px;
  color: var(--text);
  font-weight: 600;
  transition: color .2s;
}
.related-card:hover .related-content h3 { color: var(--primary-2); }
.related-date { font-size: 13px; color: var(--text-3); display: flex; align-items: center; gap: 6px; }
.cta-section { padding: 96px 0; }
.cta-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 56px;
  border-radius: 20px;
  background:
    linear-gradient(135deg, rgba(27,92,255,0.14), rgba(2,215,242,0.04)),
    rgba(255,255,255,0.06);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  position: relative;
  overflow: hidden;
}
.cta-card::before {
  content: '官方';
  position: absolute;
  top: -30px; right: 30px;
  font-size: 130px; font-weight: 800;
  color: rgba(255,255,255,0.03);
  line-height: 1;
  pointer-events: none;
}
.cta-copy { position: relative; z-index: 1; }
.cta-copy h2 { font-size: 30px; font-weight: 700; margin: 0 0 12px; }
.cta-copy p { color: var(--text-2); font-size: 15px; margin: 0; max-width: 520px; }
.cta-actions { display: flex; gap: 16px; flex-shrink: 0; position: relative; z-index: 1; }
.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  padding: 72px 0 0;
}
.footer-brand .logo { margin-bottom: 18px; }
.footer-brand p {
  color: var(--text-3); font-size: 14px;
  margin-top: 16px; max-width: 340px;
  line-height: 1.7;
}
.footer-title {
  font-size: 16px; font-weight: 600;
  margin: 0 0 18px; color: var(--text);
}
.footer-links, .footer-contact {
  list-style: none; margin: 0; padding: 0;
}
.footer-links li { margin-bottom: 10px; }
.footer-links a {
  color: var(--text-2); font-size: 14px;
  transition: color .2s;
}
.footer-links a:hover { color: var(--primary-2); }
.footer-contact li { color: var(--text-2); font-size: 14px; margin-bottom: 10px; }
.footer-contact i { color: var(--primary-2); width: 20px; margin-right: 6px; }
.footer-bottom {
  border-top: 1px solid var(--border);
  margin-top: 56px;
  padding: 20px 0;
  text-align: center;
  color: var(--text-3);
  font-size: 13px;
}
@media (max-width: 1023px) {
  .main-nav {
    position: fixed;
    top: 0; right: 0; bottom: 0;
    width: 290px;
    background: rgba(10,15,30,0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 8px;
    padding: 100px 32px 32px;
    transform: translateX(100%);
    transition: transform .35s ease;
    box-shadow: -10px 0 30px rgba(0,0,0,0.4);
  }
  .main-nav.open { transform: translateX(0); }
  .main-nav a { font-size: 17px; padding: 12px 0; width: 100%; }
  .main-nav a.active::after { bottom: 6px; }
  .nav-cta { margin: 16px 0 0; width: 100%; }
  .nav-cta .btn { width: 100%; justify-content: center; }
  .nav-toggle { display: inline-flex; }
  .header-inner { min-height: 60px; }
}
@media (max-width: 767px) {
  .breadcrumb-wrap { padding-top: 96px; }
  .article-hero { padding: 36px 0 8px; }
  .article-head h1 { font-size: 30px; }
  .article-meta { gap: 8px 14px; font-size: 13px; }
  .article-cover-wrap { margin-top: 24px; padding: 0 16px; }
  .article-cover { aspect-ratio: 16 / 10; }
  .article-body { padding: 0 16px; margin-top: 32px; font-size: 16px; }
  .article-body h2 { font-size: 24px; }
  .article-body h3 { font-size: 20px; }
  .post-nav { padding: 20px 16px 0; flex-wrap: wrap; }
  .related-section { padding: 64px 0 20px; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 12px; }
  .section-head h2 { font-size: 26px; }
  .cta-section { padding: 64px 0; }
  .cta-card { flex-direction: column; padding: 36px 24px; text-align: center; }
  .cta-copy h2 { font-size: 24px; }
  .cta-actions { flex-direction: column; width: 100%; }
  .cta-actions .btn { width: 100%; justify-content: center; }
  .site-footer { padding-top: 56px; }
  .footer-bottom { margin-top: 40px; }
}

/* roulang page: category2 */
:root {
    --bg-page: #0A0F1E;
    --bg-section: #0D1424;
    --bg-card: #111B2E;
    --bg-lift: #16233A;
    --glass-bg: rgba(255, 255, 255, 0.06);
    --glass-border: rgba(255, 255, 255, 0.14);
    --border-card: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.16);
    --primary: #1B5CFF;
    --primary-dark: #1446C4;
    --accent: #02D7F2;
    --accent-dark: #00B8D4;
    --accent-soft: rgba(2, 215, 242, 0.14);
    --text-main: #EAEFFA;
    --text-mid: #9AA8C3;
    --text-weak: #5D6B85;
    --radius-card: 16px;
    --radius-btn: 8px;
    --radius-tag: 999px;
    --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.25);
    --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.35);
    --shadow-glow: 0 0 24px rgba(2, 215, 242, 0.35);
    --shadow-glow-hover: 0 0 36px rgba(2, 215, 242, 0.55);
    --space-section: 110px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
    background: var(--bg-page);
    color: var(--text-main);
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: 12px;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: all 0.25s ease;
}

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

.grid-container {
    max-width: 1200px;
    padding-left: 24px;
    padding-right: 24px;
}

/* ========== 头部导航 ========== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: transparent;
    transition: background 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease;
    border-bottom: 1px solid transparent;
}

.site-header.scrolled {
    background: rgba(10, 15, 30, 0.85);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom-color: var(--border-card);
    box-shadow: 0 8px 30px 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-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    background: linear-gradient(130deg, var(--primary), var(--accent));
    border-radius: 10px;
    font-size: 16px;
    font-weight: 800;
    color: #fff;
    letter-spacing: 0.02em;
    box-shadow: 0 0 18px rgba(2, 215, 242, 0.25);
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
    font-size: 18px;
    font-weight: 700;
    color: var(--text-main);
}

.logo-text em {
    display: none;
}

.logo-sub {
    font-size: 11px;
    font-weight: 400;
    color: var(--text-mid);
    letter-spacing: 0.05em;
    margin-top: 2px;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 30px;
}

.main-nav > a {
    position: relative;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-mid);
    padding: 8px 0;
    transition: color 0.25s ease;
}

.main-nav > a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
    box-shadow: 0 0 10px var(--accent);
    transition: width 0.3s ease;
}

.main-nav > a:hover,
.main-nav > a.active {
    color: var(--text-main);
}

.main-nav > a.active::after {
    width: 100%;
}

.nav-cta {
    margin-left: 8px;
}

.nav-toggle {
    display: none;
    background: none;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-btn);
    width: 42px;
    height: 42px;
    color: var(--text-main);
    font-size: 18px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    transition: background 0.25s ease, border-color 0.25s ease;
}

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

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 26px;
    border-radius: var(--radius-btn);
    font-size: 15px;
    font-weight: 600;
    line-height: 1.3;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(120deg, var(--primary), var(--accent-dark));
    color: #fff;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    box-shadow: var(--shadow-glow-hover);
    background: linear-gradient(120deg, var(--primary-dark), var(--accent));
    color: #fff;
    transform: translateY(-2px);
}

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

.btn-outline {
    background: transparent;
    border-color: var(--border-strong);
    color: var(--text-main);
}

.btn-outline:hover {
    border-color: var(--accent);
    background: var(--accent-soft);
    color: var(--accent);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 8px 20px;
    font-size: 14px;
}

.btn-lg {
    padding: 15px 36px;
    font-size: 16px;
}

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

.text-link:hover {
    color: var(--accent);
    gap: 10px;
}

/* ========== 页头横幅 ========== */
.page-banner {
    position: relative;
    min-height: 62vh;
    display: flex;
    align-items: center;
    padding: 140px 0 90px;
    overflow: hidden;
}

.banner-bg {
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-1.webp');
    background-size: cover;
    background-position: center 30%;
    z-index: 0;
}

.banner-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(10, 15, 30, 0.55) 0%, rgba(10, 15, 30, 0.75) 50%, var(--bg-page) 100%);
    z-index: 1;
}

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

.banner-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    border-radius: var(--radius-tag);
    background: var(--accent-soft);
    border: 1px solid rgba(2, 215, 242, 0.3);
    color: var(--accent);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.04em;
    margin-bottom: 22px;
}

.banner-content h1 {
    font-size: 48px;
    line-height: 1.25;
    font-weight: 800;
    letter-spacing: 0.01em;
    color: var(--text-main);
    margin-bottom: 18px;
}

.banner-content h1 span {
    color: var(--accent);
}

.banner-content > p {
    font-size: 18px;
    line-height: 1.7;
    color: var(--text-mid);
    margin-bottom: 34px;
    max-width: 600px;
}

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

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

.section-head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 56px;
}

.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    color: var(--accent);
    background: var(--accent-soft);
    border: 1px solid rgba(2, 215, 242, 0.25);
    padding: 5px 15px;
    border-radius: var(--radius-tag);
    letter-spacing: 0.06em;
    margin-bottom: 16px;
}

.section-head h2 {
    position: relative;
    font-size: 34px;
    line-height: 1.3;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 14px;
}

.section-head h2::before {
    content: "";
    display: inline-block;
    width: 4px;
    height: 26px;
    background: var(--accent);
    border-radius: 2px;
    margin-right: 10px;
    vertical-align: -3px;
    box-shadow: 0 0 12px var(--accent);
}

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

/* ========== 产品系列宽幅卡片 ========== */
.product-section {
    background: var(--bg-page);
}

.product-row-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-card);
    padding: 30px;
    margin-bottom: 32px;
    box-shadow: var(--shadow-card);
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.product-row-card:hover {
    transform: translateY(-4px);
    border-color: rgba(2, 215, 242, 0.4);
    box-shadow: var(--shadow-hover);
}

.product-img {
    border-radius: 14px;
    overflow: hidden;
    height: 100%;
    min-height: 220px;
}

.product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 14px;
    transition: transform 0.4s ease;
}

.product-row-card:hover .product-img img {
    transform: scale(1.02);
}

.product-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    height: 100%;
    padding: 8px 0;
}

.prod-sn {
    display: inline-block;
    font-family: "SF Mono", "Consolas", "Liberation Mono", monospace;
    font-size: 13px;
    font-weight: 600;
    color: var(--accent);
    background: var(--accent-soft);
    border: 1px solid rgba(2, 215, 242, 0.25);
    padding: 3px 12px;
    border-radius: var(--radius-tag);
    width: fit-content;
    margin-bottom: 12px;
    letter-spacing: 0.04em;
}

.product-content h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 10px;
}

.product-content > p {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-mid);
    margin-bottom: 16px;
    max-width: 520px;
}

.prod-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-tag);
    padding: 4px 14px;
    transition: border-color 0.25s ease, color 0.25s ease;
}

.tag:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* ========== 数据指标带 ========== */
.stats-band {
    background: linear-gradient(120deg, rgba(20, 70, 196, 0.25), rgba(2, 215, 242, 0.12));
    border-top: 1px solid var(--border-card);
    border-bottom: 1px solid var(--border-card);
    padding: 60px 0;
}

.stats-band .grid-x {
    align-items: center;
}

.stat-item {
    text-align: center;
    padding: 18px 8px;
    border-right: 1px solid rgba(255, 255, 255, 0.08);
}

.stat-item:last-child {
    border-right: none;
}

.stat-num {
    display: block;
    font-size: 40px;
    font-weight: 800;
    line-height: 1.2;
    background: linear-gradient(120deg, var(--text-main), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: var(--accent);
}

.stat-label {
    display: block;
    font-size: 14px;
    color: var(--text-mid);
    margin-top: 6px;
}

/* ========== 亮点网格 ========== */
.features-section {
    background: var(--bg-section);
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-card);
    padding: 30px 26px;
    height: 100%;
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: rgba(2, 215, 242, 0.4);
    box-shadow: var(--shadow-card);
}

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: linear-gradient(130deg, var(--primary), var(--accent));
    color: #fff;
    font-size: 22px;
    margin-bottom: 20px;
    box-shadow: 0 0 18px rgba(2, 215, 242, 0.25);
}

.feature-card h3 {
    font-size: 19px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-mid);
    margin: 0;
}

/* ========== FAQ ========== */
.faq-section {
    background: var(--bg-page);
}

.accordion {
    background: transparent;
    max-width: 800px;
    margin: 0 auto;
}

.accordion-item {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: 14px;
    margin-bottom: 16px;
    overflow: hidden;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.accordion-item:hover {
    border-color: rgba(2, 215, 242, 0.3);
}

.accordion-item.is-active {
    border-color: rgba(2, 215, 242, 0.5);
    box-shadow: 0 0 20px rgba(2, 215, 242, 0.08);
}

.accordion-title {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    background: transparent;
    padding: 22px 24px;
    font-size: 17px;
    font-weight: 600;
    color: var(--text-main) !important;
    border-bottom: none !important;
    transition: color 0.25s ease, background 0.25s ease;
}

.accordion-title:hover {
    color: var(--accent) !important;
    background: rgba(255, 255, 255, 0.03);
}

.accordion-title::before {
    display: none;
}

.accordion-title::after {
    content: "+";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    font-size: 18px;
    color: var(--accent);
    transition: transform 0.3s ease, content 0.3s ease;
    border: none !important;
    background: none !important;
    box-shadow: none !important;
    position: static;
    margin: 0;
}

.accordion-item.is-active .accordion-title::after {
    content: "\f068";
    transform: rotate(180deg);
}

.accordion-content {
    background: transparent;
    padding: 0 24px 22px;
    color: var(--text-mid);
    font-size: 15px;
    line-height: 1.75;
}

.accordion-content[aria-hidden="false"] {
    background: transparent;
}

.accordion-content p {
    margin: 0;
}

/* ========== CTA ========== */
.cta-section {
    background: transparent;
    padding-top: 0;
}

.cta-card {
    position: relative;
    border-radius: 22px;
    padding: 70px 60px;
    background: linear-gradient(210deg, rgba(27, 92, 255, 0.2), rgba(2, 215, 242, 0.08));
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.cta-card::before {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    width: 220px;
    height: 220px;
    background: radial-gradient(circle, rgba(2, 215, 242, 0.3), transparent 70%);
    pointer-events: none;
}

.cta-inner {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    flex-wrap: wrap;
}

.cta-left h2 {
    font-size: 30px;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 10px;
}

.cta-left p {
    font-size: 16px;
    color: var(--text-mid);
    margin: 0;
}

.cta-right {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

/* ========== 页脚 ========== */
.site-footer {
    background: #070B16;
    border-top: 1px solid var(--border-card);
    padding-top: 80px;
    padding-bottom: 30px;
}

.footer-brand .logo {
    margin-bottom: 18px;
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-mid);
    max-width: 300px;
    margin-bottom: 24px;
}

.footer-title {
    position: relative;
    font-size: 16px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 18px;
    padding-bottom: 10px;
}

.footer-title::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 32px;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
}

.footer-links,
.footer-contact {
    list-style: none;
    margin: 0;
    padding: 0;
}

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

.footer-links a {
    font-size: 14px;
    color: var(--text-mid);
    transition: color 0.25s ease, padding-left 0.25s ease;
}

.footer-links a:hover {
    color: var(--accent);
    padding-left: 6px;
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 14px;
    color: var(--text-mid);
    margin-bottom: 12px;
}

.footer-contact i {
    color: var(--accent);
    font-size: 14px;
    margin-top: 4px;
    width: 18px;
    text-align: center;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    margin-top: 56px;
    padding-top: 24px;
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: var(--text-weak);
    margin: 0;
}

/* ========== 响应式 ========== */
@media (max-width: 1023px) {
    :root {
        --space-section: 80px;
    }

    .product-row-card {
        padding: 24px;
    }

    .product-content {
        padding-top: 20px;
    }

    .cta-card {
        padding: 50px 36px;
    }
}

@media (max-width: 767px) {
    :root {
        --space-section: 64px;
    }

    .site-header {
        background: rgba(10, 15, 30, 0.92);
        border-bottom-color: var(--border-card);
        backdrop-filter: blur(12px);
    }

    .nav-toggle {
        display: inline-flex;
    }

    .main-nav {
        position: fixed;
        top: 74px;
        left: 0;
        right: 0;
        background: rgba(10, 15, 30, 0.97);
        backdrop-filter: blur(18px);
        -webkit-backdrop-filter: blur(18px);
        flex-direction: column;
        align-items: flex-start;
        padding: 24px 30px 30px;
        gap: 18px;
        border-bottom: 1px solid var(--border-card);
        transform: translateY(-12px);
        opacity: 0;
        visibility: hidden;
        transition: all 0.35s ease;
        z-index: 99;
    }

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

    .main-nav > a {
        width: 100%;
        font-size: 17px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        padding-bottom: 14px;
    }

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

    .nav-cta {
        width: 100%;
        margin-top: 8px;
    }

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

    .banner-content h1 {
        font-size: 34px;
    }

    .banner-content > p {
        font-size: 16px;
    }

    .page-banner {
        min-height: 70vh;
        padding: 120px 0 60px;
    }

    .section-head h2 {
        font-size: 26px;
    }

    .stat-num {
        font-size: 30px;
    }

    .stat-item {
        border-right: none;
        padding: 12px 4px;
    }

    .product-img {
        min-height: 180px;
    }

    .product-content h3 {
        font-size: 21px;
    }

    .accordion-title {
        font-size: 15px;
        padding: 18px 18px;
        flex-direction: row-reverse;
        justify-content: space-between;
    }

    .accordion-content {
        padding: 0 18px 18px;
        font-size: 14px;
    }

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

    .cta-inner {
        flex-direction: column;
        justify-content: center;
        text-align: center;
    }

    .cta-right {
        justify-content: center;
        width: 100%;
    }

    .cta-right .btn {
        flex: 1;
        min-width: 140px;
    }

    .btn-lg {
        padding: 14px 24px;
        font-size: 15px;
    }

    .footer-bottom p {
        font-size: 12px;
        line-height: 1.6;
    }
}

@media (max-width: 520px) {
    .grid-container {
        padding-left: 18px;
        padding-right: 18px;
    }

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

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

    .product-row-card {
        padding: 18px;
    }

    .prod-tags {
        gap: 6px;
    }

    .tag {
        font-size: 12px;
        padding: 3px 10px;
    }

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

    .stat-label {
        font-size: 12px;
    }

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

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

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