/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #d32f2f;
  --primary-dark: #b71c1c;
  --primary-light: #ff6659;
  --accent: #ff8f00;
  --accent-light: #ffc107;
  --bg-light: #fafafa;
  --bg-white: #ffffff;
  --bg-dark: #1a1a2e;
  --bg-section: #f5f5f5;
  --text-primary: #212121;
  --text-body: #424242;
  --text-muted: #757575;
  --text-light: #bdbdbd;
  --text-white: #ffffff;
  --border-color: #e0e0e0;
  --border-light: #f0f0f0;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
  --shadow-xl: 0 16px 60px rgba(0,0,0,0.16);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  --max-width: 1200px;
  --header-height: 72px;
  --spacer-xs: 0.5rem;
  --spacer-sm: 1rem;
  --spacer-md: 2rem;
  --spacer-lg: 4rem;
  --spacer-xl: 6rem;
}

/* ===== 基础 Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-sans);
  color: var(--text-body);
  background: var(--bg-white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover, a:focus { color: var(--primary-dark); }
a:focus-visible { outline: 3px solid var(--primary-light); outline-offset: 2px; }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; font-size: inherit; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { color: var(--text-primary); line-height: 1.3; font-weight: 700; }

/* ===== 容器 ===== */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.25rem; }
.container-wide { max-width: 1360px; margin: 0 auto; padding: 0 1.25rem; }

/* ===== 导航 ===== */
.site-header {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  background: rgba(255,255,255,0.97); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  height: var(--header-height);
  transition: var(--transition);
}
.site-header.scrolled { box-shadow: var(--shadow-md); }
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--header-height); max-width: var(--max-width); margin: 0 auto;
  padding: 0 1.25rem;
}
.logo { display: flex; align-items: center; gap: 0.5rem; }
.logo-icon {
  width: 40px; height: 40px; border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1.25rem; font-weight: 900;
  flex-shrink: 0;
}
.logo-text {
  font-size: 1.35rem; font-weight: 800; color: var(--text-primary);
  letter-spacing: 0.5px; line-height: 1.2;
}
.logo-text span { color: var(--primary); }
.nav-list { display: flex; align-items: center; gap: 0.25rem; }
.nav-list a {
  display: block; padding: 0.6rem 1.1rem; border-radius: var(--radius-sm);
  color: var(--text-body); font-weight: 500; font-size: 0.95rem;
  transition: var(--transition); position: relative;
}
.nav-list a:hover { color: var(--primary); background: rgba(211,47,47,0.06); }
.nav-list a.active { color: var(--primary); font-weight: 600; }
.nav-list a.active::after {
  content: ''; position: absolute; bottom: 4px; left: 50%; transform: translateX(-50%);
  width: 20px; height: 3px; border-radius: 2px; background: var(--primary);
}
.nav-cta {
  background: var(--primary) !important; color: #fff !important;
  padding: 0.5rem 1.25rem !important; border-radius: 50px !important;
  font-weight: 600 !important; margin-left: 0.5rem;
}
.nav-cta:hover { background: var(--primary-dark) !important; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(211,47,47,0.3); }
.mobile-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--text-primary); cursor: pointer; padding: 0.25rem; }

/* ===== 移动端导航 ===== */
@media (max-width: 768px) {
  .mobile-toggle { display: block; }
  .nav-list {
    position: fixed; top: var(--header-height); left: 0; width: 100%;
    background: var(--bg-white); flex-direction: column; padding: 1rem 1.25rem;
    gap: 0.25rem; box-shadow: var(--shadow-lg); transform: translateY(-120%);
    opacity: 0; transition: var(--transition); border-top: 1px solid var(--border-light);
    pointer-events: none;
  }
  .nav-list.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-list a { width: 100%; padding: 0.8rem 1rem; border-radius: var(--radius-sm); }
  .nav-list a.active::after { display: none; }
  .nav-list a.active { background: rgba(211,47,47,0.08); }
  .nav-cta { text-align: center; margin-left: 0; margin-top: 0.5rem; }
}

/* ===== Hero 首屏 ===== */
.hero {
  position: relative; min-height: 92vh; display: flex; align-items: center;
  padding-top: var(--header-height); overflow: hidden;
  background: var(--bg-dark);
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
  filter: brightness(0.45) saturate(1.1); transform: scale(1.05);
  transition: transform 8s ease;
}
.hero:hover .hero-bg { transform: scale(1.0); }
.hero-overlay {
  position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(135deg, rgba(26,26,46,0.85) 0%, rgba(0,0,0,0.6) 50%, rgba(211,47,47,0.3) 100%);
}
.hero-content { position: relative; z-index: 2; width: 100%; padding: 3rem 0; }
.hero-inner { max-width: var(--max-width); margin: 0 auto; padding: 0 1.25rem; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: rgba(255,255,255,0.12); backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.2); padding: 0.4rem 1.2rem;
  border-radius: 50px; font-size: 0.85rem; color: var(--text-white);
  margin-bottom: 1.5rem; letter-spacing: 0.5px;
}
.hero-badge i { color: var(--accent-light); }
.hero h1 {
  font-size: clamp(2.2rem, 5.5vw, 4rem); font-weight: 800;
  color: var(--text-white); line-height: 1.2; margin-bottom: 1rem;
  max-width: 800px;
}
.hero h1 span { color: var(--accent-light); }
.hero-sub {
  font-size: clamp(1rem, 2vw, 1.3rem); color: rgba(255,255,255,0.85);
  max-width: 640px; line-height: 1.7; margin-bottom: 2rem;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; }
.btn-primary, .btn-outline {
  display: inline-flex; align-items: center; gap: 0.6rem;
  padding: 0.85rem 2.2rem; border-radius: 50px; font-weight: 600;
  font-size: 1rem; transition: var(--transition); cursor: pointer;
  border: none; text-decoration: none;
}
.btn-primary {
  background: var(--primary); color: #fff;
  box-shadow: 0 4px 20px rgba(211,47,47,0.35);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(211,47,47,0.4); color: #fff; }
.btn-outline {
  background: transparent; color: #fff;
  border: 2px solid rgba(255,255,255,0.5);
}
.btn-outline:hover { background: rgba(255,255,255,0.12); border-color: #fff; color: #fff; transform: translateY(-2px); }
.hero-stats {
  display: flex; flex-wrap: wrap; gap: 2.5rem; margin-top: 3rem;
  padding-top: 2rem; border-top: 1px solid rgba(255,255,255,0.15);
}
.hero-stat-item { text-align: left; }
.hero-stat-num { font-size: 2rem; font-weight: 800; color: #fff; line-height: 1.2; }
.hero-stat-num span { color: var(--accent-light); }
.hero-stat-label { font-size: 0.9rem; color: rgba(255,255,255,0.7); margin-top: 0.15rem; }

@media (max-width: 768px) {
  .hero { min-height: 80vh; }
  .hero-stats { gap: 1.5rem; }
  .hero-stat-num { font-size: 1.5rem; }
}

/* ===== 通用板块 ===== */
.section { padding: var(--spacer-xl) 0; }
.section-alt { background: var(--bg-section); }
.section-dark { background: var(--bg-dark); color: var(--text-white); }
.section-header {
  text-align: center; max-width: 700px; margin: 0 auto var(--spacer-lg);
}
.section-header h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem); font-weight: 800;
  margin-bottom: 0.75rem;
}
.section-header h2 span { color: var(--primary); }
.section-header p {
  color: var(--text-muted); font-size: 1.05rem; line-height: 1.7;
}
.section-dark .section-header h2 { color: #fff; }
.section-dark .section-header p { color: rgba(255,255,255,0.7); }

/* ===== 卡片 ===== */
.card {
  background: var(--bg-white); border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm); transition: var(--transition);
  overflow: hidden; border: 1px solid var(--border-light);
  height: 100%; display: flex; flex-direction: column;
}
.card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.card-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; display: block; }
.card-body { padding: 1.5rem; flex: 1; display: flex; flex-direction: column; }
.card-tag {
  display: inline-block; padding: 0.2rem 0.8rem; border-radius: 50px;
  font-size: 0.75rem; font-weight: 600; background: rgba(211,47,47,0.08);
  color: var(--primary); margin-bottom: 0.75rem; align-self: flex-start;
}
.card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 0.5rem; color: var(--text-primary); }
.card p { color: var(--text-muted); font-size: 0.95rem; line-height: 1.6; flex: 1; }
.card-footer { padding: 1rem 1.5rem; border-top: 1px solid var(--border-light); display: flex; align-items: center; justify-content: space-between; }
.card-meta { font-size: 0.85rem; color: var(--text-light); display: flex; align-items: center; gap: 0.5rem; }
.card-link { color: var(--primary); font-weight: 600; font-size: 0.9rem; display: inline-flex; align-items: center; gap: 0.25rem; }
.card-link:hover { gap: 0.5rem; }

/* ===== 服务卡片（特色） ===== */
.service-card {
  background: var(--bg-white); border-radius: var(--radius-md);
  padding: 2rem 1.75rem; text-align: center;
  box-shadow: var(--shadow-sm); transition: var(--transition);
  border: 1px solid var(--border-light); height: 100%;
}
.service-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.service-icon {
  width: 64px; height: 64px; margin: 0 auto 1.25rem;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(211,47,47,0.08), rgba(211,47,47,0.02));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.75rem; color: var(--primary);
  transition: var(--transition);
}
.service-card:hover .service-icon { background: var(--primary); color: #fff; transform: scale(1.05); }
.service-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 0.6rem; }
.service-card p { color: var(--text-muted); font-size: 0.95rem; line-height: 1.6; }

/* ===== 流程节点 ===== */
.process-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem;
  position: relative;
}
.process-step {
  text-align: center; position: relative; padding: 1.5rem 1rem;
}
.process-num {
  width: 52px; height: 52px; margin: 0 auto 1rem;
  border-radius: 50%; background: var(--primary);
  color: #fff; font-size: 1.3rem; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
  position: relative; z-index: 2;
  box-shadow: 0 4px 16px rgba(211,47,47,0.25);
}
.process-step h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 0.4rem; }
.process-step p { font-size: 0.9rem; color: var(--text-muted); }
.process-line {
  position: absolute; top: 2.6rem; left: calc(50% + 3rem);
  right: calc(50% - 1.5rem); height: 2px;
  background: repeating-linear-gradient(90deg, var(--border-color) 0, var(--border-color) 8px, transparent 8px, transparent 16px);
  z-index: 0;
}
@media (max-width: 900px) {
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .process-line { display: none; }
  .process-step { padding: 1rem 0.5rem; }
}
@media (max-width: 520px) {
  .process-grid { grid-template-columns: 1fr; gap: 1rem; }
}

/* ===== 数据统计 ===== */
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem;
  text-align: center;
}
.stat-item { padding: 1.5rem; }
.stat-number {
  font-size: 2.8rem; font-weight: 800; color: var(--primary);
  line-height: 1.1; margin-bottom: 0.3rem;
}
.stat-number span { font-size: 1.4rem; }
.stat-label { font-size: 1rem; color: var(--text-muted); font-weight: 500; }
@media (max-width: 768px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
  .stat-number { font-size: 2rem; }
}

/* ===== FAQ ===== */
.faq-list { max-width: 780px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border-color); border-radius: var(--radius-sm);
  margin-bottom: 0.75rem; overflow: hidden; transition: var(--transition);
  background: var(--bg-white);
}
.faq-item:hover { border-color: var(--primary); }
.faq-question {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.1rem 1.25rem; cursor: pointer; font-weight: 600;
  font-size: 1rem; color: var(--text-primary); background: none;
  border: none; width: 100%; text-align: left;
  transition: var(--transition);
}
.faq-question i { color: var(--primary); font-size: 0.85rem; transition: var(--transition); }
.faq-item.active .faq-question i { transform: rotate(180deg); }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height 0.35s ease;
  padding: 0 1.25rem; color: var(--text-muted); font-size: 0.95rem;
  line-height: 1.7;
}
.faq-item.active .faq-answer { max-height: 300px; padding: 0 1.25rem 1.1rem; }

/* ===== CTA 区块 ===== */
.cta-section {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  padding: var(--spacer-lg) 0; text-align: center; position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: ''; position: absolute; inset: 0;
  background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
  opacity: 0.08; pointer-events: none;
}
.cta-inner { position: relative; z-index: 1; max-width: 650px; margin: 0 auto; padding: 0 1.25rem; }
.cta-inner h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); font-weight: 800; color: #fff; margin-bottom: 0.75rem; }
.cta-inner p { color: rgba(255,255,255,0.85); font-size: 1.05rem; margin-bottom: 2rem; }
.cta-inner .btn-primary {
  background: #fff; color: var(--primary); box-shadow: 0 4px 24px rgba(0,0,0,0.2);
}
.cta-inner .btn-primary:hover { background: var(--accent-light); color: var(--text-primary); transform: translateY(-2px); }

/* ===== 资讯列表（CMS） ===== */
.post-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.post-empty {
  grid-column: 1 / -1; text-align: center; padding: 3rem 1rem;
  color: var(--text-muted); font-size: 1.05rem;
  background: var(--bg-white); border-radius: var(--radius-md);
  border: 1px dashed var(--border-color);
}
@media (max-width: 900px) {
  .post-list { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px) {
  .post-list { grid-template-columns: 1fr; }
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-dark); color: rgba(255,255,255,0.7);
  padding: var(--spacer-lg) 0 0;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 2.5rem; padding-bottom: var(--spacer-md);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .logo-text { color: #fff; margin-bottom: 0.75rem; display: inline-block; }
.footer-brand .logo-text span { color: var(--accent-light); }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 320px; }
.footer-social { display: flex; gap: 0.75rem; margin-top: 1rem; }
.footer-social a {
  width: 40px; height: 40px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.15); display: flex;
  align-items: center; justify-content: center;
  color: rgba(255,255,255,0.6); transition: var(--transition);
  font-size: 1rem;
}
.footer-social a:hover { background: var(--primary); border-color: var(--primary); color: #fff; }
.footer h4 { color: #fff; font-size: 1rem; font-weight: 700; margin-bottom: 1rem; }
.footer-links li { margin-bottom: 0.5rem; }
.footer-links a { color: rgba(255,255,255,0.6); font-size: 0.9rem; transition: var(--transition); }
.footer-links a:hover { color: var(--accent-light); padding-left: 4px; }
.footer-contact p { display: flex; align-items: center; gap: 0.65rem; font-size: 0.9rem; margin-bottom: 0.6rem; color: rgba(255,255,255,0.6); }
.footer-contact i { color: var(--accent-light); width: 1rem; }
.footer-bottom {
  padding: 1.25rem 0; text-align: center;
  font-size: 0.85rem; color: rgba(255,255,255,0.4);
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--accent-light); }
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; text-align: center; }
  .footer-brand p { max-width: 100%; }
  .footer-social { justify-content: center; }
  .footer-contact p { justify-content: center; }
}

/* ===== 工具类 ===== */
.text-center { text-align: center; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.gap-1 { gap: 1rem; }
.flex-center { display: flex; align-items: center; justify-content: center; }

/* ===== Foundation 覆盖 ===== */
.grid-container { max-width: var(--max-width); padding-left: 1.25rem; padding-right: 1.25rem; }
.cell { margin-bottom: 1.5rem; }

/* ===== 动画 ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-in { animation: fadeInUp 0.6s ease forwards; }
.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0f2a42;
            --secondary: #e85d3a;
            --secondary-light: #f07a5a;
            --accent: #f0c940;
            --bg-light: #f7f9fc;
            --bg-dark: #0f1a28;
            --bg-white: #ffffff;
            --text-dark: #1a2a3a;
            --text-body: #3a4a5a;
            --text-light: #6a7a8a;
            --text-white: #f0f4f8;
            --border-color: #dce4ec;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(26, 58, 92, 0.08);
            --shadow-md: 0 6px 24px rgba(26, 58, 92, 0.12);
            --shadow-lg: 0 12px 40px rgba(26, 58, 92, 0.16);
            --transition: 0.25s ease;
            --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --nav-height: 72px;
            --section-gap: 80px;
            --section-gap-mobile: 48px;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

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

        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        a:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-dark);
            line-height: 1.3;
            font-weight: 700;
        }

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

        .container-narrow {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--nav-height);
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(220, 228, 236, 0.6);
            z-index: 1000;
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 2px 20px rgba(26, 58, 92, 0.10);
        }

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

        .logo-text {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }
        .logo-text span {
            color: var(--secondary);
        }

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

        .nav-list a {
            padding: 8px 18px;
            border-radius: 30px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-body);
            transition: background var(--transition), color var(--transition);
        }
        .nav-list a:hover {
            background: rgba(26, 58, 92, 0.06);
            color: var(--primary);
        }
        .nav-list a.active {
            background: var(--primary);
            color: #fff;
        }
        .nav-list a.active:hover {
            background: var(--primary-light);
        }

        .nav-list a.nav-cta {
            background: var(--secondary);
            color: #fff;
            padding: 8px 24px;
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
        }
        .nav-list a.nav-cta:hover {
            background: var(--secondary-light);
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(232, 93, 58, 0.30);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--primary);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
        }
        .nav-toggle:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== 移动端导航 ===== */
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-list {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                width: 100%;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                -webkit-backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: transform 0.35s ease, opacity 0.35s ease;
                box-shadow: 0 12px 40px rgba(26, 58, 92, 0.10);
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-list a {
                width: 100%;
                padding: 12px 18px;
                border-radius: var(--radius-sm);
                font-size: 1rem;
            }
            .nav-list a.nav-cta {
                justify-content: center;
                margin-top: 6px;
            }
        }

        /* ===== Hero ===== */
        .hero-section {
            padding: calc(var(--nav-height) + 40px) 0 60px;
            min-height: 520px;
            display: flex;
            align-items: center;
            position: relative;
            background: var(--bg-dark) url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 26, 40, 0.88) 0%, rgba(26, 58, 92, 0.72) 100%);
            z-index: 1;
        }

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(240, 201, 64, 0.18);
            color: var(--accent);
            font-size: 0.85rem;
            font-weight: 600;
            padding: 6px 18px;
            border-radius: 30px;
            border: 1px solid rgba(240, 201, 64, 0.30);
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }

        .hero-title {
            font-size: 3.2rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.15;
            max-width: 780px;
            margin-bottom: 18px;
        }
        .hero-title span {
            color: var(--accent);
        }

        .hero-desc {
            font-size: 1.15rem;
            color: rgba(240, 244, 248, 0.85);
            max-width: 640px;
            line-height: 1.7;
            margin-bottom: 32px;
        }

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

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--secondary);
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 34px;
            border-radius: 40px;
            border: none;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
        }
        .btn-primary:hover {
            background: var(--secondary-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(232, 93, 58, 0.35);
        }
        .btn-primary:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: transparent;
            color: var(--text-white);
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 34px;
            border-radius: 40px;
            border: 2px solid rgba(240, 244, 248, 0.40);
            cursor: pointer;
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
        }
        .btn-outline-light:hover {
            background: rgba(240, 244, 248, 0.10);
            border-color: rgba(240, 244, 248, 0.70);
            color: var(--text-white);
            transform: translateY(-2px);
        }
        .btn-outline-light:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

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

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

        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark .section-subtitle {
            color: var(--text-white);
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-dark);
            margin-bottom: 12px;
        }
        .section-dark .section-header h2 {
            color: var(--text-white);
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-light);
            max-width: 620px;
            margin: 0 auto;
            line-height: 1.7;
        }

        .section-tag {
            display: inline-block;
            background: rgba(26, 58, 92, 0.08);
            color: var(--primary);
            font-size: 0.80rem;
            font-weight: 600;
            letter-spacing: 1px;
            padding: 4px 16px;
            border-radius: 30px;
            margin-bottom: 14px;
            text-transform: uppercase;
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

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

        @media (max-width: 640px) {
            .card-grid {
                grid-template-columns: 1fr;
            }
        }

        .service-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 28px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .service-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }

        .service-card .card-icon {
            width: 56px;
            height: 56px;
            background: rgba(26, 58, 92, 0.06);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary);
            margin-bottom: 18px;
            transition: background var(--transition), color var(--transition);
        }
        .service-card:hover .card-icon {
            background: var(--primary);
            color: #fff;
        }

        .service-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-dark);
        }

        .service-card p {
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.6;
        }

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

        @media (max-width: 900px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
        }

        .step-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 24px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            position: relative;
            text-align: center;
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            background: var(--primary);
            color: #fff;
            font-size: 1.1rem;
            font-weight: 800;
            border-radius: 50%;
            margin-bottom: 16px;
        }

        .step-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-dark);
        }

        .step-card p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ===== 场景 / 案例 ===== */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

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

        @media (max-width: 640px) {
            .scene-grid {
                grid-template-columns: 1fr;
            }
        }

        .scene-card {
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-white);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .scene-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
        }

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

        .scene-card .scene-body {
            padding: 20px 22px 24px;
        }

        .scene-card .scene-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-dark);
        }

        .scene-card .scene-body p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.6;
        }

        .scene-tag {
            display: inline-block;
            background: rgba(232, 93, 58, 0.10);
            color: var(--secondary);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 20px;
            margin-bottom: 10px;
        }

        /* ===== 统计数字 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px 20px;
            }
        }

        .stat-item .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.1;
        }

        .stat-item .stat-label {
            font-size: 0.95rem;
            color: rgba(240, 244, 248, 0.75);
            margin-top: 4px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }

        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-dark);
            text-align: left;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(26, 58, 92, 0.03);
        }
        .faq-question:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: -3px;
        }

        .faq-question .faq-icon {
            font-size: 1rem;
            color: var(--primary);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 0 24px 18px;
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            padding: 64px 0;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 12px;
        }

        .cta-section p {
            font-size: 1.05rem;
            color: rgba(240, 244, 248, 0.80);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }

        .cta-section .btn-primary {
            font-size: 1.05rem;
            padding: 16px 42px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(240, 244, 248, 0.75);
            padding: 56px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(240, 244, 248, 0.08);
        }

        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 540px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

        .footer-brand .logo-text {
            font-size: 1.2rem;
            color: var(--text-white);
        }
        .footer-brand .logo-text span {
            color: var(--secondary);
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            margin-top: 12px;
            color: rgba(240, 244, 248, 0.60);
        }

        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 16px;
        }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(240, 244, 248, 0.06);
            color: rgba(240, 244, 248, 0.60);
            font-size: 1.05rem;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .footer-social a:hover {
            background: var(--secondary);
            color: #fff;
            transform: translateY(-2px);
        }

        .site-footer h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 14px;
        }

        .footer-links li {
            margin-bottom: 8px;
        }
        .footer-links a {
            font-size: 0.9rem;
            color: rgba(240, 244, 248, 0.55);
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-contact p {
            font-size: 0.9rem;
            color: rgba(240, 244, 248, 0.55);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-contact i {
            width: 18px;
            color: var(--accent);
        }

        .footer-bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(240, 244, 248, 0.40);
        }
        .footer-bottom a {
            color: rgba(240, 244, 248, 0.55);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== 响应式断点 ===== */
        @media (max-width: 1024px) {
            .hero-title {
                font-size: 2.6rem;
            }
            .section-header h2 {
                font-size: 1.9rem;
            }
            .stat-item .stat-number {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: var(--section-gap-mobile);
            }
            .hero-section {
                min-height: 440px;
                padding: calc(var(--nav-height) + 28px) 0 44px;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-outline-light {
                justify-content: center;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.7rem;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
            .container {
                padding: 0 16px;
            }
            .hero-section {
                min-height: 380px;
                padding: calc(var(--nav-height) + 20px) 0 32px;
            }
            .stat-item .stat-number {
                font-size: 1.8rem;
            }
            .service-card,
            .step-card {
                padding: 24px 18px 20px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.95rem;
            }
            .faq-answer-inner {
                padding: 0 16px 14px;
            }
            .btn-primary,
            .btn-outline-light {
                padding: 12px 24px;
                font-size: 0.95rem;
            }
        }

        /* ===== 辅助 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .gap-12 {
            gap: 12px;
        }

        /* ===== Foundation 覆盖 ===== */
        .grid-container {
            max-width: var(--max-width);
            padding-left: 24px;
            padding-right: 24px;
        }
        @media (max-width: 520px) {
            .grid-container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0b1a2e;
            --primary-light: #132a45;
            --secondary: #0077b6;
            --accent: #f77f00;
            --accent-hover: #e67300;
            --gold: #d4af37;
            --bg-light: #f0f4f8;
            --bg-white: #ffffff;
            --text-dark: #0b1a2e;
            --text-body: #2d3748;
            --text-muted: #6b7a8f;
            --border-light: #e2e8f0;
            --shadow-sm: 0 2px 8px rgba(11, 26, 46, 0.06);
            --shadow-md: 0 8px 30px rgba(11, 26, 46, 0.1);
            --shadow-lg: 0 20px 60px rgba(11, 26, 46, 0.12);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --font-base: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --content-width: 780px;
            --nav-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-base);
            color: var(--text-body);
            background: var(--bg-white);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--secondary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        a:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

        ul,
        ol {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-dark);
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.01em;
        }

        p {
            margin-bottom: 1rem;
            color: var(--text-body);
        }

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

        button {
            cursor: pointer;
            background: none;
        }

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

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

        .section-padding {
            padding: 80px 0;
        }

        .section-padding-sm {
            padding: 56px 0;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 26, 46, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            height: var(--nav-height);
            transition: var(--transition);
        }

        .site-header.scrolled {
            background: rgba(11, 26, 46, 0.98);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
        }

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

        .logo-text {
            font-size: 1.35rem;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .logo-text span {
            color: var(--accent);
        }

        .logo-text .logo-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            background: var(--accent);
            border-radius: 50%;
            margin-left: 6px;
        }

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

        .nav-list a {
            color: rgba(255, 255, 255, 0.75);
            font-size: 0.9rem;
            font-weight: 500;
            padding: 8px 18px;
            border-radius: 100px;
            transition: var(--transition);
            position: relative;
            letter-spacing: 0.3px;
        }

        .nav-list a:hover {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.08);
        }

        .nav-list a.active {
            color: #ffffff;
            background: rgba(247, 127, 0, 0.2);
        }

        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }

        .nav-list a.nav-cta {
            background: var(--accent);
            color: #ffffff;
            padding: 8px 24px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 16px rgba(247, 127, 0, 0.3);
        }

        .nav-list a.nav-cta:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 24px rgba(247, 127, 0, 0.4);
        }

        .nav-list a.nav-cta i {
            font-size: 0.85rem;
            transition: var(--transition);
        }

        .nav-list a.nav-cta:hover i {
            transform: translateX(4px);
        }

        /* 移动端汉堡 */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 8px;
            background: none;
            border: none;
            z-index: 1001;
        }

        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: #ffffff;
            border-radius: 4px;
            transition: var(--transition);
            transform-origin: center;
        }

        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .hamburger.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }

        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== 文章 Hero ===== */
        .article-hero {
            position: relative;
            padding: 140px 0 80px;
            margin-top: var(--nav-height);
            background: var(--primary);
            overflow: hidden;
            min-height: 380px;
            display: flex;
            align-items: center;
        }

        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            opacity: 0.25;
            z-index: 0;
        }

        .article-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 26, 46, 0.92) 0%, rgba(11, 26, 46, 0.6) 100%);
            z-index: 1;
        }

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

        .article-hero .article-category {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(247, 127, 0, 0.2);
            color: var(--accent);
            padding: 6px 16px;
            border-radius: 100px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            text-transform: uppercase;
            margin-bottom: 20px;
            border: 1px solid rgba(247, 127, 0, 0.2);
        }

        .article-hero .article-category i {
            font-size: 0.75rem;
        }

        .article-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #ffffff;
            max-width: 900px;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px 28px;
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
        }

        .article-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .article-meta .meta-item i {
            color: var(--accent);
            font-size: 0.9rem;
        }

        .article-meta .meta-divider {
            width: 4px;
            height: 4px;
            background: rgba(255, 255, 255, 0.3);
            border-radius: 50%;
        }

        /* ===== 文章正文 ===== */
        .article-content-section {
            padding: 60px 0 40px;
            background: var(--bg-white);
        }

        .article-body {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-body);
        }

        .article-body p {
            margin-bottom: 1.6rem;
        }

        .article-body h2,
        .article-body h3,
        .article-body h4 {
            margin-top: 2.4rem;
            margin-bottom: 1rem;
            color: var(--text-dark);
        }

        .article-body h2 {
            font-size: 1.6rem;
        }
        .article-body h3 {
            font-size: 1.3rem;
        }

        .article-body img {
            border-radius: var(--radius-md);
            margin: 2rem 0;
            box-shadow: var(--shadow-md);
        }

        .article-body blockquote {
            border-left: 4px solid var(--accent);
            padding: 1.2rem 1.8rem;
            margin: 2rem 0;
            background: var(--bg-light);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-muted);
        }

        .article-body ul,
        .article-body ol {
            list-style: disc;
            padding-left: 1.6rem;
            margin-bottom: 1.6rem;
        }

        .article-body ul li,
        .article-body ol li {
            margin-bottom: 0.4rem;
        }

        .article-body a {
            color: var(--secondary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }

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

        /* 文章未找到 */
        .article-not-found {
            text-align: center;
            padding: 80px 20px;
        }

        .article-not-found .not-found-icon {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .article-not-found h2 {
            font-size: 1.8rem;
            margin-bottom: 12px;
        }

        .article-not-found p {
            color: var(--text-muted);
            font-size: 1.1rem;
            margin-bottom: 28px;
        }

        .btn-back-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #ffffff;
            padding: 14px 32px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
        }

        .btn-back-home:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            color: #ffffff;
        }

        /* ===== 文章导航（上下篇） ===== */
        .article-nav-section {
            background: var(--bg-light);
            padding: 32px 0;
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .article-nav-inner {
            display: flex;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }

        .article-nav-item {
            display: flex;
            flex-direction: column;
            gap: 4px;
            max-width: 45%;
        }

        .article-nav-item .nav-label {
            font-size: 0.75rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 1px;
            font-weight: 600;
        }

        .article-nav-item a {
            font-weight: 600;
            color: var(--text-dark);
            font-size: 1rem;
            transition: var(--transition);
        }

        .article-nav-item a:hover {
            color: var(--accent);
        }

        .article-nav-item.next {
            text-align: right;
            align-items: flex-end;
        }

        /* ===== 相关文章 ===== */
        .related-section {
            padding: 80px 0;
            background: var(--bg-white);
        }

        .related-section .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .related-section .section-header h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-dark);
            margin-bottom: 8px;
        }

        .related-section .section-header p {
            color: var(--text-muted);
            font-size: 1.05rem;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .related-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }

        .related-card .card-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: var(--transition);
        }

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

        .related-card .card-img .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--accent);
            color: #ffffff;
            padding: 4px 12px;
            border-radius: 100px;
            font-size: 0.7rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

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

        .related-card .card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .related-card .card-body h3 a {
            color: var(--text-dark);
        }

        .related-card .card-body h3 a:hover {
            color: var(--secondary);
        }

        .related-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            flex: 1;
            margin-bottom: 16px;
        }

        .related-card .card-body .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--text-muted);
            padding-top: 12px;
            border-top: 1px solid var(--border-light);
        }

        .related-card .card-body .card-meta i {
            margin-right: 4px;
            font-size: 0.75rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: var(--primary);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.1;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 16px;
        }

        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 640px;
            margin: 0 auto 32px;
        }

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

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: #ffffff;
            padding: 16px 36px;
            border-radius: 100px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(247, 127, 0, 0.3);
        }

        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(247, 127, 0, 0.4);
            color: #ffffff;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 255, 255, 0.1);
            color: #ffffff;
            padding: 16px 36px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 1.05rem;
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: var(--transition);
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.18);
            color: #ffffff;
            transform: translateY(-2px);
        }

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

        .faq-section .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .faq-section .section-header h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-dark);
            margin-bottom: 8px;
        }

        .faq-section .section-header p {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto;
        }

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

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

        .faq-item:hover {
            border-color: var(--secondary);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-dark);
            background: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
            gap: 16px;
        }

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

        .faq-question .faq-icon {
            font-size: 1.1rem;
            color: var(--accent);
            transition: var(--transition);
            flex-shrink: 0;
        }

        .faq-item.active .faq-question .faq-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
            padding: 0 24px;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.7);
            padding: 64px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 48px;
        }

        .footer-brand .logo-text {
            font-size: 1.5rem;
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            margin-bottom: 20px;
            max-width: 360px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.6);
            font-size: 1.1rem;
            transition: var(--transition);
        }

        .footer-social a:hover {
            background: var(--accent);
            color: #ffffff;
            transform: translateY(-3px);
        }

        .site-footer h4 {
            color: #ffffff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .site-footer h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 30px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }

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

        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

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

        .footer-contact p {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 12px;
        }

        .footer-contact p i {
            width: 16px;
            color: var(--accent);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.4);
            margin-bottom: 0;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }

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

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

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

            .article-hero h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --nav-height: 64px;
            }

            .hamburger {
                display: flex;
            }

            .nav-list {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                background: var(--primary);
                flex-direction: column;
                padding: 80px 24px 40px;
                gap: 4px;
                box-shadow: -10px 0 40px rgba(0, 0, 0, 0.3);
                transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                align-items: stretch;
                overflow-y: auto;
            }

            .nav-list.open {
                right: 0;
            }

            .nav-list a {
                padding: 14px 20px;
                font-size: 1rem;
                border-radius: var(--radius-sm);
                color: rgba(255, 255, 255, 0.7);
            }

            .nav-list a.active {
                background: rgba(247, 127, 0, 0.15);
            }

            .nav-list a.active::after {
                display: none;
            }

            .nav-list a.nav-cta {
                margin-top: 12px;
                justify-content: center;
                padding: 14px 24px;
            }

            /* 遮罩 */
            .nav-overlay {
                position: fixed;
                inset: 0;
                background: rgba(0, 0, 0, 0.5);
                z-index: 999;
                opacity: 0;
                pointer-events: none;
                transition: opacity 0.4s ease;
            }

            .nav-overlay.show {
                opacity: 1;
                pointer-events: all;
            }

            .article-hero {
                padding: 100px 0 56px;
                min-height: 280px;
            }

            .article-hero h1 {
                font-size: 1.8rem;
            }

            .article-meta {
                font-size: 0.8rem;
                gap: 12px 20px;
            }

            .article-content-section {
                padding: 40px 0 24px;
            }

            .article-body {
                font-size: 1rem;
                line-height: 1.8;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .related-section {
                padding: 56px 0;
            }

            .related-section .section-header h2 {
                font-size: 1.6rem;
            }

            .cta-section {
                padding: 56px 0;
            }

            .cta-section h2 {
                font-size: 1.6rem;
            }

            .faq-section {
                padding: 56px 0;
            }

            .faq-section .section-header h2 {
                font-size: 1.6rem;
            }

            .faq-question {
                padding: 16px 18px;
                font-size: 0.95rem;
            }

            .faq-answer {
                padding: 0 18px;
            }
            .faq-item.active .faq-answer {
                padding: 0 18px 16px;
            }

            .section-padding {
                padding: 56px 0;
            }

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

            .footer-brand p {
                max-width: 100%;
            }

            .article-nav-inner {
                flex-direction: column;
                gap: 16px;
            }

            .article-nav-item {
                max-width: 100%;
            }

            .article-nav-item.next {
                text-align: left;
                align-items: flex-start;
            }

            .article-not-found {
                padding: 56px 20px;
            }

            .article-not-found .not-found-icon {
                font-size: 3rem;
            }

            .btn-primary,
            .btn-secondary {
                padding: 14px 28px;
                font-size: 0.95rem;
                width: 100%;
                justify-content: center;
            }

            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
        }

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

            .content-container {
                padding: 0 16px;
            }

            .article-hero h1 {
                font-size: 1.5rem;
            }

            .article-hero {
                padding: 80px 0 40px;
                min-height: 220px;
            }

            .article-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }

            .article-meta .meta-divider {
                display: none;
            }

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

            .related-card .card-body {
                padding: 18px;
            }

            .related-card .card-body h3 {
                font-size: 1rem;
            }

            .logo-text {
                font-size: 1.1rem;
            }

            .footer-grid {
                gap: 24px;
            }
        }

        /* ===== 工具类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-1 {
            margin-top: 1rem;
        }
        .mt-2 {
            margin-top: 2rem;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }
        .mb-2 {
            margin-bottom: 2rem;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }